Note: Descriptions are shown in the official language in which they were submitted.
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1 Transmission Devices for Locks with Changeable Lock Core
2 Assemblies
3 Background of the Invention
4 1. Field of the Invention
The present invention relates to transmission devices
6 for locks with changeable lock core assemblies and, more
7 particularly, to transmission devices for locks with
8 changeable lock core assemblies which allow easy, smooth
9 operation during change of the lock core assemblies and which
are simple in structures, easy in installation, and low in
11 cost.
12 2. Description of the Related Art
13 Generally, locks include different types of structures
14 responsive to different needs and different users, e.g.,
lever locks, trumpet locks, auxiliary locks, etc., wherein
16 the lever locks and the trumpet locks are primary locks while
17 the auxiliary locks provide further security in addition to
18 the lever locks and the trumpet locks.
19 The lock core assemblies of traditional locks cannot
be dismantled. Figs. 1 and 2 of the drawings illustrate a
21 conventional lever lock in which rotation of either handle
22 "A" causes rotation of a wing-like driving member "C" of a
23 tubular member "B", which, in turn, causes retraction or
24 protruding movement of a latch bolt via transmission of an
actuating member "D", thereby locking or unlocking the door
26 to which the lever lock is mounted. The lock core assembly of
27 the lever lock cannot be dismantled. Trumpet locks include
28 similar structures and, therefore, the lock core assemblies
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1 thereof are also undetachable.
2 For safety consideration, house renters and hotel
3 managers often change the locks after the previous tenants
4 and guests have returned the keys, thereby improving security
and preventing burglary and theft invents. Yet replacement of
6 the whole lock is time-consuming. In addition, frequent
7 replacements result in a decrease in the life-periods of the
8 locks.
9 Fig. 3 of the drawing illustrates a conventional
auxiliary lock which is commonly used in important
11 departments of public places. However, same problems exist,
12 especially in the case of transfer or resignation of the
13 staff or there is a change in the employees in which all of
14 the locks in the working area must be changed periodically,
thereby avoiding loss of property due to unauthorized copying
16 of the keys.
17 In view of the above-mentioned problems, locks having
18 changeable lock core assemblies have been developed to meet
19 the needs of different users, in which a lock core assembly
can be removed from or inserted into the lock via a front
21 side of the lock without detachment of any other elements of
22 the lock. Generally, a lock with a changeable lock core
23 assembly requires two keys, one of which can be operated to
24 open or close the door to which the lock is mounted, while
the other one of which is specifically used for change of the
26 lock core assembly. However, it is found that a positioning
27 protrusion of a transmission device of the lock cannot be
28 effectively positioned after removal of the lock core
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1 assembly. More specifically, the positioning protrusion
2 cannot be aligned with a hole of the lock core assembly
3 during installation as the former is deviated by an angle or
4 inclined, or due to rotation of either handle. Therefore,
manufactures often annex a pushing rod to the packaged lock
6 for users such that the user may use the pushing rod to push
7 the positioning protrusion to a position in alignment with
8 the hole of the lock core assembly for installation of the
9 later. Nevertheless, it is still inconvenient for users.
Therefore, there has been a long and unfulfilled need
11 for an improved lock with a changeable lock core assembly
12 which mitigates and/or obviates the above-mentioned problems.
13 Summary of the Invention
14 It is an object of the present invention to provide a
transmission device for a lock with a changeable lock core
16 assembly in which replacement of the lock core assembly of,
17 e.g., a lever lock or trumpet lock, can be easily, smoothly
18 accomplished.
19 It is another object of the present invention to
provide a transmission device for an auxiliary lock such that
21 the auxiliary lock may include a changeable lock core.
22 In accordance with one aspect of the invention, a
23 transmission device is provided for a lock assembly which
24 comprises a handle assembly including:
a tubular member having a first end, a second end, and
26 a longitudinal axis, the first end of the tubular member
27 including an axial hole defined therein and extending along
28 the longitudinal axis of the tubular member, the second end
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1 of the tubular member including a receptacle defined therein
2 and in communication with the axial hole, a handle being
3 formed on the second end of the tubular member, a lock core
4 assembly being removably mounted in the receptacle of the
S handle assembly and including a lock core therein, the lock
6 core including a first end, a second end, and a longitudinal
7 axis, the first end of the lock core having a key hole
8 defined therein; and
9 means for releasably retaining the lock core assembly
in the receptacle upon rotation of the lock core assembly.
11 The transmission device comprises:
12 a key driving means received in the axial hole of the
13 tubular member and including a first end and a second end,
14 the second end of the key driving means including an end face
plate extending in a direction transverse to a longitudinal
16 axis of the key driving means, two spaced positioning rods
17 projecting outwardly from the end face plate and extending
18 away from the first end along a direction parallel to the
19 longitudinal axis of the key driving means; and
the second end of the lock core having two positioning
21 holes defined therein and extending along a direction
22 parallel to the longitudinal axis of the lock core, the
23 positioning rods being removably extended through the holes
24 in the second end of the lock core, wherein the holes are
respectively aligned with the positioning rods when mounting
26 the lock core assembly into the receptacle. (Fig. 4)
27 In accordance with a further aspect of the invention,
28 a transmission device is provided for a lock assembly which
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1 comprises a handle assembly including:
2 a tubular member including therein a transverse plate
3 which extends in a direction transverse to a longitudinal
4 axis of the tubular member, the transverse plate being
movable between a first position which is partially extended
6 beyond the tubular member and a second position which is
7 retracted into the tubular member;
8 a handle including a first end, a second end, and a
9 longitudinal axis, the first end of the handle including an
l0 axial hole defined therein and extending along the
11 longitudinal axis of the handle for partially receiving the
12 tubular member, the second end of the handle including a
13 receptacle defined therein and in communication with the
14 axial hole, the handle further including a peripheral wall
having a positioning slot defined therein through which.the
16 transverse plate is partially extended to the first position
17 thereof, thereby engaging the handle with the tubular member,
18 a lock core assembly being removably mounted to the
19 receptacle of the handle assembly and including a lock core
therein, the lock core including a first end, a second end,
21 and a longitudinal axis, the first end of the lock core
22 having a key hole defined therein; and
23 means for releasably retaining the lock core assembly
24 in the receptacle upon rotation of the lock core assembly.
The transmission device comprises:
26 a key driving means including a key driving tubular
27 member and a transmission member, the key driving tubular
28 member including a first end, a second end, and a
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1 longitudinal axis, the transmission member including a first
2 end removably attached to the second end of the key driving
3 tubular member and a second end, two spaced positioning rods
4 projecting outwardly from the second end of the transmission
member; and
6 the second end of the lock core having two positioning
7 holes defined therein and extending along a direction
8 parallel to the longitudinal axis of the lock core, the
9 positioning rods being removably extended through the holes
in the second end of the lock core, wherein the holes are
11 respectively aligned with the positioning rods when mounting
12 the lock core assembly into the receptacle.
13 In one embodiment of the invention, the second end of
14 the key driving tubular member includes a plate mounted
therein and extending in a direction transverse to .the
16 longitudinal axis of the key driving tubular member. The
17 plate includes an opening defined therein, and the
18 transmission member includes a disc having a first side, a
19 second side, and a longitudinal axis. An insert plate
projects outwardly from the first side of the disc and
21 extends along the longitudinal axis of the disc. The two
22 spaced positioning rods project outwardly from the second
23 side of the disc and extend along a direction parallel to the
24 longitudinal axis of the disc. The insert plate is removably
received in the opening of the plate in the key driving
26 tubular member. (Fig. S)
27 In another embodiment of the invention, the disc
28 includes a central opening. The insert plate is releasably
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1 extended through the central opening to the second side of
2 the disc, and the positioning rods project from an end of the
3 insert plate located at the second side of the disc. The
4 insert plate further includes a stop formed on a mediate
section of each of two longitudinal sides thereof. (Fig. 14)
5 In a further embodiment of the invention, the disc
7 further includes a second plate projecting outwardly from the
8 second side thereof and extending along the longitudinal axis
9 thereof. The transverse plate in the tubular member rests on
a side of the second plate to prevent the transverse plate
11 from being moved into the tubular member due to an external
12 force, thereby preventing disengagement of the tubular member
13 from the handle. When the transmission member is rotated
14 through a pre-determined angle, the transverse plate is moved
into the second position within the tubular member such that
16 the tubular member is disengaged from the handle, thereby
17 allowing removal of the handle. (Fig. 7)
18 In a still another embodiment, the disc includes a
19 central opening, and the insert plate and the second plate
are integral and releasably extended through the central
21 opening and respectively located at the first side and the
22 second side of the disc. The integral insert plate/second
23 plate further includes a stop formed on a mediate section of
24 each of two longitudinal sides thereof. (Fig. 13)
In a yet another embodiment of the invention, the disc
26 further includes a second plate projecting outwardly from the
27 second side thereof and extending along the longitudinal axis
28 thereof, and the positioning rods project from the second
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1 plate. located at the second side of the disc. (Fig. 15)
2 In a modified embodiment of the invention, the disc
3 includes a cruciform central opening, and the insert plate
4 and the second plate are integral and releasably extended
S through the central opening and respectively located at the
6 first side and the second side of the disc. The integral
7 insert plate/second plate further includes a stop formed on a
8 mediate section of each of two longitudinal sides thereof.
9 (Fig. 16)
In a still another embodiment of the invention, the
11 second end of the key driving tubular member includes two
12 diametrically extending grooves defined therein, the two
13 grooves being perpendicular to each other. The disc includes
14 two opposed lateral sides, and two engaging blocks are
respectively formed on the two opposed lateral sides of.the
16 disc for releasably engaging one of the two diametrically
17 extending grooves in the key driving tubular member. (Fig. 9;
18 Fig. 11)
19 Preferably, the disc further includes at least one
knurl projecting from a side thereof. The transverse plate in
21 the tubular member rests on the knurl to prevent the
22 transverse plate from being moved into the tubular member due
23 to an external force, thereby preventing disengagement of the
24 tubular member from the handle. When the transmission member
is rotated through a pre-determined angle, the transverse
26 plate is moved into the tubular member such that the tubular
27 member is disengaged from the handle, thereby allowing
28 removal of the handle.
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1 In accordance with a further aspect of the invention,
2 a transmission device for a lock assembly which comprises:
3 a sleeve including a first end and a second end, the
4 sleeve further including a first hole and a second hole which
is in communication with the first hole, the first and second
6 holes together forming a receptacle for receiving a lock core
7 assembly, a bore being defined in the second end of the
8 sleeve and in communication with the second hole, a
9 protrusion section being formed along a periphery defining
l0 the bore;
11 The transmission device connects the lock core
12 assembly with the sleeve and comprises:
13 a positioning member including a plate which is
14 attached to a bottom end wall defining the second hole and
which has a central opening defined therein, the plate
16 including two spaced positioning rods projecting from two
17 opposed longitudinal sides thereof and extending away from
18 the bottom end wall defining the second hole along a
19 direction parallel to a longitudinal axis of a lock core of
the lock core assembly received in the receptacle of the
21 sleeve, the plate further including a protrusion which is
22 formed on a lateral side thereof and which is received in the
23 bore of the sleeve, the positioning rods being extended
24 through two holes defined in the lock core of the lock core
assembly and extending along a direction parallel to the
26 longitudinal axis of the lock core;
27 a transmission element having a relatively large first
28 end and a relatively small second end, the second end of the
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1 transmission element being extended through the central
2 opening of the positioning member beyond the sleeve; and
3 a rotational positioning element received in the
4 second end of the sleeve, the rotational positioning element
including an opening through which the second end of the
6 transmission element extends, and a protrusion being formed
7 around the opening and received in the bore of the sleeve.
8 The transmission element may include a stop knurl
9 formed on a lateral side thereof adjacent to the first end
thereof, and movements of the positioning member and the
11 rotational positioning element are restrained between the
12 first end of the transmission element and the stop knurl.
13 Other objects, advantages, and novel features of the
14 invention will become more apparent from the following
detailed description when taken in conjunction with,the
16 accompanying drawings.
17 Brief Description of the Drawings
18 Fig. 1 is an exploded perspective view of a
19 conventional lever lock;
Fig. 2 is a schematic side elevational view, partially
21 sectioned, of the conventional lever lock in Fig. l;
22 Fig. 3 is an exploded perspective view of a
23 conventional auxiliary lock;
24 Fig. 4 is an exploded perspective view of a first
embodiment of a transmission device in accordance with the
26 present invention applied to a lever lock;
27 Fig. 5 is an exploded perspective view of a second
28 embodiment of a transmission device in accordance with the
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1 present invention applied to trumpet lock;
a
2 Fig. 6 is a cross-sectional
view of the
trumpet lock
3 in Fig. 5;
4 Fig. 7 is an exploded perspective view of a third
embodiment of device in accordance with the
a
transmission
6 present invention applied to lever lock;
a
7 Fig. 8 is a cross-sectional view of the lever lock
in
8 Fig. 7;
9 Fig. 9 is an exploded perspective view of a fourth
embodiment of device in accordance with the
a
transmission
11 present invention applied to lever lock;
a
12 Fig. 10 a cross-sectional
is view of the
lever lock
in
13 Fig. 9;
14 Fig. 11 is an exploded perspective view of the fourth
embodiment of a t ransmission device in accordance with;the
16 present invention applied to a trumpet lock;
17 Fig. 12 is a cross-sectional view of the trumpet lock
18 in Fig. 11;
19 Fig. 13 is an exploded perspective view illustrating
a
modified embodime nt of a transmission member of the third
21 embodiment of the transmission device in accordance with the
22 present invention;
23 Fig. 14 is an exploded perspective view illustrating
a
24 modified embodime nt of a transmission member of the second
embodiment of the transmission device in accordance with the
26 present invention;
27 Fig. 15 is a perspective view of a transmission member
28 of a fifth embodiment of the transmission device in
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1 accordance with the present invention;
2 Fig. 16 is an exploded perspective view illustrating a
3 modified embodiment of the transmission rod in Fig. 15;
4 Fig. 17 is an exploded perspective view of a further
S embodiment of the transmission device in accordance with the
present invention applied to an auxiliary lock;
7 Fig. 18 is a cross-sectional view, taken along line
8 18-18 of Fig. 19, of the auxiliary lock in Fig. 17;
9 Fig. 19 is an end view of the auxiliary lock in Fig.
18; and
11 Fig. 20 is an exploded view of another embodiment of
12 the transmission device in accordance with the present
13 invention applied to an auxiliary lock.
14 Description of the Preferred Embodiments
Referring to Figs. 3 to 20 and initially to Fig. 4~ in
16 which an exploded perspective view of a first embodiment of a
17 transmission device in accordance with the present invention
18 applied to a lever lock is shown. It is appreciated that the
19 transmission device can be applied to a trumpet lock in
addition to the lever lock. As can be seen in Fig. 4, the
21 lever lock includes a handle assembly 3 and a transmission
22 device. The handle assembly 3 includes a tubular member
23 having a first end 310 and a second end 320. The first end
24 310 includes an axial hole 330 defined therein and extending
along a longitudinal axis of the tubular member, while the
26 second end 320 includes a substantially "8" shaped receptacle
27 340 defined therein and in communication with the axial hole
28 330. The second end 320 further includes an engaging means
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1 (not. shown) mounted therein and a lever-type handle (not
2 labeled) extending therefrom. The first end 310 is connected
3 to and thus actuates an actuating member (not shown) in the
4 lever lock.
S The transmission device includes a key driving means 5
6 which is cylindrical and includes a first end 510 and a
7 second end 520. The second end 520 includes an end face plate
8 530 extending in a direction transverse to a longitudinal
9 axis of the key driving means 5. Two spaced positioning rods
540 project outwardly from the end face plate 530 and extend
11 away from the first end 510 along a direction parallel to the
12 longitudinal axis of the key driving means 5.
13 A lock core assembly 1 is removably mounted in the "8"
14 shaped receptacle 340 and includes a lock core 11 therein.
The lock core 11 includes a key hole 12 to allow insertion of
16 a key 9. The lock core 11 further includes two spaced holes
17 13 which are defined in an end opposite to the key hole 12
18 and which extend along a direction parallel to a longitudinal
19 axis of the lock core assembly 1. The lock core assembly 1
further includes a protrusion 14 formed on an outer periphery
21 thereof for positioning of the lock core assembly 1 in the
22 receptacle 340.
23 In assembly, the key driving means 5 is received in
24 the axial hole 330 of the handle assembly 3, wherein the
positioning rods 540 of the key driving means 5 are extended
26 into the "8" shaped receptacle 340. Then, the lock core
27 assembly 1 is inserted into the "8" shaped receptacle 340
28 with the positioning holes 13 of the lock core assembly 1 in
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1 alignment with the positioning rods 540. Rotation of the key
2 9 for changing the lock core assembly 1 causes rotation of
3 the whole lock core assembly 1 in a direction that the
4 protrusion 14 may be engaged with an engaging means (not
S shown) of the handle assembly 3, thereby achieving
positioning of the lock core assembly 1 in the "8" shaped
7 receptacle 340. For normal locking and unlocking operation of
8 the lever lock, a different key therefor (not shown) may be
9 inserted into the key hole 12 to rotate the lock core 11,
which, in turn, actuates the actuating member (not shown) via
11 transmission of the key driving means 5, thereby locking or
12 unlocking the lever lock. When changing the lock core
i3 assembly 1 is required, the key 9 is inserted and rotated
14 through a pre-determined angle in an opposite direction to
disengage the protrusion 14 from the engaging means (not
16 shown) of the handle assembly 3, and the lock core assembly 1
17 is then removable from the "8" shaped receptacle 340, which
18 is conventional and therefore not further described.
19 The first embodiment can be modified so as to be
applied to a trumpet lock. Figs. 5 and 6 illustrate a second
21 embodiment of the present invention, in which the trumpet
22 lock includes a handle assembly and a transmission device.
23 The handle assembly comprises a tubular member 32 and a knob-
24 type handle 33. The transmission device includes a key
2S driving means which, in turn, includes a key driving tubular
26 member 51 and a transmission member 52.
27 The tubular member 32 includes therein a transverse
28 plate 321 which extends in a direction transverse to a
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1 longitudinal axis of the tubular member 32 and which is
2 located between two ends of the tubular member 32. The
3 transverse plate 321 may be partially extended beyond a wall
4 of the tubular member 32 or retracted into the tubular member
32. An elastic member (not shown) is provided to bias the
6 transverse plate 321 to make the transverse plate 321
7 partially extend beyond the wall of the tubular member 32.
8 The handle 33 includes a first end 331 and a second
9 end 332. The first end 331 includes an axial hole 333 defined
therein and extending along a longitudinal axis of the handle
11 33 for receiving an end of the tubular member 32, while the
12 second end 332 includes a substantially "8" shaped receptacle
13 334 defined therein and in communication with the axial hole
14 333. The second end 332 further includes an engaging means
(not shown) mounted therein. As shown in Fig. 6, the handle
16 33 includes a peripheral wall having a positioning slot 335
17 defined therein. The above-mentioned transverse plate 321 may
18 be partially extended through the positioning slot 335,
19 thereby engaging the handle 33 with the tubular member 32
together.
21 The key driving tubular member 51 is cylindrical and
22 includes a first end 511 and a second end 512. The second end
23 512 includes a plate 513 mounted therein and extending in a
24 direction transverse to a longitudinal axis of the key
driving tubular member 51. The plate 513 includes an opening
26 514 defined therein.
27 The transmission member 52 includes a disc 521 having
28 a first side and a second side. An insert plate 522 projects
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1 outwardly from the first side and extends along a
2 longitudinal axis of the disc 521. Two spaced positioning
3 rods 523 project outwardly from the second side and extend
4 along a direction parallel to the longitudinal axis of the
S disc 521. Preferably, the insert plate 522 and the
6 positioning rods 523 extend on the same plane. The insert
7 plate 522 is removably received in the opening 514 of the
8 plate 513 in the key driving tubular member 51. As shown in
9 Fig. 6, the transverse plate 321 in the tubular member 32
rests on a side of one of the positioning rods 523, thereby
11 preventing the transverse plate 321 from being moved into the
12 tubular member 32 due to an external force which may cause
13 disengagement of the tubular member 32 from the handle 33.
14 Yet, if the transmission member 52 is rotated through a pre-
determined angle, the transverse plate 321 is moved into, the
15 tubular member 32 such that the tubular member 32 is
17 disengaged from the handle 33, thereby allowing removal of
18 the handle 33.
19 Assembly of the second embodiment is substantially the
same as that of the first embodiment. It is appreciated that,
21 as shown in Fig. 6, the transverse plate 321 of the tubular
22 member 32 and the plate 513 in the key driving tubular member
23 51 may tightly, securely retain the disc 521 of the
24 transmission member 52 in position in a manner that the
longitudinal axes of the positioning rods 523 of the
26 transmission member 52 are substantially parallel to the
27 longitudinal axis of the tubular member 32, thereby allowing
28 easy insertion of a lock core assembly 1 into the tubular
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1 member 32 by means of the positioning rods 523 respectively
2 and smoothly received in two positioning holes 13 of a lock
3 core 11 (see Fig. 5) of the lock core assembly 1.
4 Figs. 7 and 8 illustrate a third embodiment of the
present invention, in which the substantially "8" shaped lock
6 core assembly 1 for the lever lock illustrated therein is
7 identical to the lock core assembly 1 for the trumpet lock in
8 Figs. 5 and 6, except for that there is a 90 degrees
9 difference in installation angle. The key driving tubular
member 51 and the tubular member 32 in this embodiment are
11 identical to those disclosed in Figs. 5 and 6 and therefore
12 not further described. The knob-like handle 33 in Figs. 5 and
13 6 is changed to a lever-like handle 31, and like elements
14 thereof are designated by like reference numerals except by
different leading numerals (i.e., "333" is changed to "3~3",
16 "331" is changed to "311", etc.).
17 The transmission member 53 in this embodiment includes
18 a disc 531 having a first side and a second side. An insert
19 plate 533 projects outwardly from the first side and extends
along a longitudinal axis of the disc 531. Two spaced
21 positioning rods 532 project outwardly from the second side
22 and extend along a direction parallel to the longitudinal
23 axis of the disc 531. A second plate 534 projects outwardly
24 from the second side and extends between the positioning rods
2S 532 and along the longitudinal axis of the disc 531.
26 Preferably, the insert plate 533 and the second plate 534
27 extend on the same plane, while the positioning rods 532 lie
28 on a plane perpendicular to the insert plate 533. The insert
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1 plate 533 is removably received in the opening 514 of the
2 plate 513 in the key driving tubular member 51. As shown in
3 Fig. 8, the transverse plate 321 in the tubular member 32
4 rests on a side of the second plate 534, thereby preventing
the transverse plate 321 from being moved into the tubular
6 member 32 due to an external force which may cause
7 disengagement of the tubular member 32 from the handle 31.
8 Yet, if the transmission member 53 is rotated through a pre-
9 determined angle, the transverse plate 321 is moved into the
tubular member 32 such that the tubular member 32 is
11 disengaged from the handle 31, thereby allowing removal of
12 the handle 31.
13 Assembly of the third embodiment is substantially the
14 same as that of the second embodiment, the only difference
therebetween is that the knob-like handle 33 is changed to
16 the lever-like handle 31, wherein a longitudinal plane of the
17 "8" shaped receptacle 334 of the knob-like handle 33 is
18 perpendicular to that of the "8" shaped receptacle 314 of the
19 lever-like handle 31 such that the installation degree
therefor is rotated through 90 degrees. Nevertheless, for the
21 whole transmission device, it is only required to modify the
22 transmission member 52 to the transmission member 53 which
23 has been hereinbefore described.
24 Figs. 9 to 12 illustrate a fourth embodiment of a
transmission device in accordance with the present invention,
26 in which the transmission device (i.e., the key driving
27 means) may be applied to either a lever lock (Figs. 9 and 10)
28 or a trumpet lock (Figs. 11 and 12)
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1 In Figs. 9 to 12, the transmission device (i.e., the
2 key driving means) includes a key driving tubular member 54
3 and a transmission member 55. The key driving tubular member
4 54 includes a first end 541 and a second end 542. The second
S end 542 includes two diametrically extending grooves 543
6 defined therein. The two grooves 543 are perpendicular to
7 each other. A block 544 is formed in an end of each of the
8 grooves 543. The transmission member 55 includes a disc 551
9 having two spaced positioning rods 552 projecting from two
opposed longitudinal sides thereof and extending away from
11 the second end 542 of the key driving tubular member 54 along
12 a longitudinal axis of the transmission member 55. Two
13 engaging blocks 553 are respectively formed on two opposed
14 lateral sides of the disc 551. The disc 551 further includes
two knurls 554 projecting from a side thereof along a
16 direction of which the positioning rods 552 extend.
17 When applied to a lever lock, as shown in Figs. 9 and
18 10, the two engaging blocks 553 of the disc 551 are received
19 in the horizontally extending groove 543 in Fig. 9. As shown
in Fig. 10, the transverse plate 321 in the tubular member 32
21 rests on one of the knurls 554, thereby preventing the
22 transverse plate 321 from being moved into the tubular member
23 32 due to an external force which may cause disengagement of
24 the tubular member 32 from the handle 31. Yet, if the
transmission member 55 is rotated through a pre-determined
26 angle, the transverse plate 321 is moved into the tubular
27 member 32 such that the tubular member 32 is disengaged from
28 the handle 31, thereby allowing removal of the handle 31.
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1 Furthermore, each of the longitudinal sides of the disc 551
2 is indented in a mediate portion thereof (see Fig. 9), such
3 that the disc 551 of the transmission member 55 can be
4 securely held in a space defined between the blocks 544 of
S the key driving tubular member 54 and the transverse plate
6 321 of the tubular member 32, thereby assuring that the
7 longitudinal axes of the positioning rods 552 are parallel to
8 the longitudinal axis of the tubular member 32.
9 When applied to a trumpet lock, as shown in Figs. 11
and 12, the two engaging blocks 553 of the disc 551 are
11 received in the vertically extending groove 543 in Fig. 11
12 (by means of simply rotating the transmission member 55 in
13 Fig. 9 through 90 degrees): As shown in Fig. 12, the
14 transverse plate 321 in the tubular member 32 rests on a side
1S of one of the positioning rods 552, thereby preventing.the
16 transverse plate 321 from being moved into the tubular member
17 32 due to an external force which may cause disengagement of
18 the tubular member 32 from the handle 31. Yet, if the
19 transmission member 55 is rotated through a pre-determined
angle, the transverse plate 321 is moved into the tubular
21 member 32 such that the tubular member 32 is disengaged from
22 the handle 31, thereby allowing removal of the handle 31.
23 Again, each of the longitudinal sides of the disc 551 is
24 indented in a mediate portion thereof (see Fig. 11), such
that the disc S51 of the transmission member 55 can be
26 securely held in a space defined between the blocks 544 of
27 the key driving tubular member 54 and the transverse plate
28 321 of the tubular member 32, thereby assuring that the
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1 longitudinal axes of the positioning rods 552 are parallel to
2 the longitudinal axis of the tubular member 32.
3 Fig. 13 illustrates a modified embodiment of the
4 transmission member of the third embodiment (cf. Fig. 7) of
S the transmission device, wherein the transmission member 53
6 (see Fig. 7) may comprise two parts: a connecting plate 56
7 and a transmission element 57. The connecting plate 56 is
8 substantially rectangular and includes a first end 561 and a
9 second end 562. A stop 563 is formed on a mediate section of
each of two longitudinal sides of the connecting plate 56.
11 The transmission element 57 includes a disc 571 having a
12 central opening 572 defined therein through which the second
13 end 562 of the connecting plate 56 extends. The disc 571
14 includes two spaced positioning rods 573 projecting from two
opposed longitudinal sides thereof and extending away from
16 the stops 563 of the connecting plate 56 along a direction
17 parallel to a longitudinal axis of the disc 571. The second
18 end 562 of the connecting plate 56 may be extended through
19 the central opening 572 of the disc 571 until the stops 563
bear against a periphery defining the central opening 572 of
21 the disc 571, thereby forming an integral unit.
22 Fig. 14 illustrates a modified embodiment of the
23 transmission member of the second embodiment (cf. Fig. 5) of
24 the transmission device, wherein the transmission member may
comprise two parts: a positioning disc 59 and a transmission
26 element 58. The positioning disc 59 is substantially a
2~ circular disc 591 with a central opening 592 defined therein.
28 The transmission element 58 is substantially a rectangular
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CA 02203057 1997-04-18
1 plate which includes a first end 581 and a second
end 582. A
2 stop 583 is formed on a mediate section of each of two
3 longitudinal sides of the transmission element 58.
The
4 transmission element 58 further includes two spaced
positioning rods 584 projecting from the second end
582
6 thereof and extending away from the stops 583 along
a
'7 direction parallel to a longitudinal axis of the transmission
8 element 58. The second end 582 as well as the positioning
9 rods 584 of the transmission element 58 may be extended
through the central opening 592 of the disc 5 91 until the
11 stops 583 bear against a periphery defining the central
12 opening 592 of the disc 591, thereby forming an integral
13 unit.
14 Fig. 15 illustrates a fifth embodiment of the present
invention which is modified from the transmission member 53
16 of the third embodiment. As can be seen in Fig. 15, the
17 transmission member, which is now designated by reference
18 numeral "41", includes a disc 411 having a first side and a
19 second side. A first plate 412 projects outwardly from the
first side and extends along a longitudinal axis of the disc
21 411. A second plate 413 projects outwardly from the second
22 side and extends along the longitudinal axis of the disc 411.
23 Two spaced positioning rods 414 project outwardly from the
24 second plate 413 and extend along a direction parallel to the
longitudinal axis of the disc 413. Assembly and operation of
26 the fifth embodiment are the same as those of the third
27 embodiment and are therefore not redundantly described.
28 Fig. 16 illustrates a modified embodiment of the
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CA 02203057 1997-04-18
1 transmission member of the fifth embodiment (cf. Fig. 15) of
2 the transmission device, wherein the transmission member
3 comprises two parts: a positioning disc 42 and a transmission
4 element 43. The positioning disc 42 is substantially a
circular disc 421 with a central cruciform opening 422
6 defined therein. The transmission element 43 is substantially
7 a rectangular plate which includes a first end 431 and a
8 second end 432. A stop 433 is formed on a mediate section of
9 each of two longitudinal sides of the transmission element
l0 43. The transmission element 43 further includes two spaced
11 positioning rods 434 projecting from the second end 432
12 thereof and extending away from the stops 433 along a
13 direction parallel to a longitudinal axis of the transmission
14 element 43. The second end 432 as well as the positioning
rods 434 of the transmission element 43 may be extended
16 through the central cruciform opening 422 of the disc 421
17 until the stops 433 bear against a periphery defining the
18 central cruciform opening 422 of the disc 421, thereby
19 forming an integral unit.
Figs. 17 to 19 illustrate a further embodiment of the
21 transmission device in accordance with the present invention
22 which is applied to an auxiliary lock. The transmission
23 device, which is used to connect a lock core assembly 100
24 (see Fig. 17) of an auxiliary lock with a sleeve 6 of the
auxiliary lock, includes a positioning member 7, a
26 transmission element 8, and a rotational positioning element
27 9.
28 The sleeve 6 is substantially cylindrical and includes
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i a first end 61 and a second end 62. The sleeve 6 further
2 includes a first hole 63 and a second hole 64 which is in
3 communication with the first hole 63. The first and second
4 holes 63 and 64 together form a substantially "8" shaped
S receptacle for receiving the lock core assembly 100. A bore
6 6S is defined in the second end 62 of the sleeve 6 and is in
7 communication with the second hole 64, as shown in Fig. 18. A
8 protrusion section 66 is formed along a periphery defining
9 the bore 65.
The positioning member 7 is substantially a plate
11 which is attached to a bottom end wall defining the second
12 hole 64 and which has a central opening 71 defined therein.
13 The plate includes two spaced positioning rods 72 projecting
14 from two opposed longitudinal sides thereof and extending
away from the bottom end wall defining the second hole. 64
16 along a direction parallel to a longitudinal axis of a lock
17 core 103 of the lock core assembly 100 received in the "8"
18 shaped receptacle of the sleeve 6. The plate further includes
19 a protrusion 73 which is formed on a lateral side thereof and
which is received in the bore 65 of the sleeve 6. The
21 positioning rods 72 may be extended through two holes 101
22 defined in the lock core 103 of the lock core assembly 100
23 and extending along a direction parallel to the longitudinal
24 axis of the lock core 103.
The transmission element 8 is substantially a rod
26 having a relatively large first end 81 and a relatively small
27 second end 82. The second end 82 is extended through the
28 central opening 71 of the positioning member 7 beyond the
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CA 02203057 1997-04-18
1 sleeve 6.
2 The rotational positioning element 9 is substantially
3 a disc received in the second end 62 of the sleeve 6. The
4 rotational positioning element 9 includes an opening 91
through which the second end 82 of the transmission element 8
6 extends. Nevertheless, it is appreciated that the rotational
7 positioning element 9 and the transmission element 8 can be
8 made together by fitting engagement, riveting, welding,
9 gluing, etc. A protrusion 92 is formed around the opening 91
and can be received in the bore 65 of the sleeve 6.
11 Alternatively, the protrusion 92 can be replaced by a
12 plurality of aligned knurls.
13 In assembly, the second end 82 of the transmission
14 element 8 is extended through the opening 71 of the
positioning member 7, and the first end 81 of .the
16 transmission element 8 bears against the positioning member
17 7. Then, positioning member 7 and the transmission element 8
18 are inserted into the second hole 64 of the sleeve 6, in
19 which the second end 82 of the transmission element 8 is
extended beyond the second end 62 of the sleeve 6, while the
21 protrusion 73 of the positioning member 7 is received in the
22 bore 65 of the sleeve 6. The second end 82 of the
23 transmission element 8 is fittingly extended through the
24 opening 91 of the rotational positioning element 9, and the
protrusion 92 of the rotational positioning element 9 is
26 received in the bore 65 of the sleeve 6 and spaced from the
27 protrusion 73 of the positioning member 7. Thereafter, for
28 insertion of the lock core assembly 100, the holes 101 of the
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CA 02203057 1997-04-18
1 lock.core 103 are aligned with the positioning rods 72 of the
2 positioning member 7 and moved along a longitudinal axis of
3 the lock core 103 until the lock core 103 is received in the
4 receptacle of the sleeve 6 defined by the first and second
holes 63 and 64 of the sleeve 6. When a key (not shown) for
6 locking and unlocking is inserted into a key hole (not
7 labeled) of the lock core 103 and rotated through a pre-
8 determined angle, the protrusion 73 of the positioning member
9 7 bears against the protrusion 92 of the rotational
positioning element 9 to make the rotational positioning
11 member 9 and the transmission element 8 rotate together,
12 thereby causing a portion of the second end 82 of the
13 transmission element 8 to engage with a latch bolt (not
14 shown) to move therewith.
Fig. 20 illustrates a modified embodiment of .the
16 transmission device in Fig. 17, in which a stop knurl 83 is
17 formed on the transmission element 8 adjacent to the first
18 end 81, such that the positioning member 7 and the rotational
19 positioning element 9 are restrained between the first end 81
and the stop knurl 83.
21 Although the invention has been explained in relation
22 to its preferred embodiment, it is to be understood that many
23 other possible modifications and variations can be made
24 without departing from the spirit and scope of the invention
as hereinafter claimed.
26
27
28
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