Note: Descriptions are shown in the official language in which they were submitted.
CA 02262229 1999-02-17
CURING DEVICE FOR LIGHT-INDUCED CURING aF DENTAL
MATERIALS
Background of the Invention
The present invention relates to curing device, especially for
light-induced curing of dental materials, having substantially a pistol-
shape with a grip whereby the grip is connected by a cable to a
supply station and whereby the supply station has a support for
supporting the curing device.
Such a light curing device, in the following referred to as
, hand-held apparatus, is known from European patent application 0
168 364 or German Gebrauchsmuster 92 12 892. These known
solutions have a cable connection between the grip of the
substantially pistol-shaped hand-held apparatus and the supply
station. For ergonomic reasons, the cable exits the hand-held
apparatus usually at the lower end of the grip in order to prevent
that the cable will be a nuisance when manipulating the device in
the vicinity of a patent's mouth.
The supply station has a supportforsupporking the hand-held
apparatus which support receives the grip of the hand-held
apparatus. While such a support for a hand-held apparatus
operated by batteries, as known from European patent application
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CA 02262229 1999-02-17
588 800, can be realized without problems) the more powerful
cable-supplied version of a hand-held apparatus, that is
- independent of battery operation, requires special measures at the
support in order to accommodate the cable connection for such
plug-in supports.
German Gebrauchsmuster 95 12 $92 therefore provides
special slots. However, this requires the cable to be inserted exactly
at this location. This complicated insertion has already been
realized in the known Gebrauchsmuster so that instead of one slot
two slots are provided which both are suitable for extending the
cable therethrough.
Even though these slots provide a plurality of insertion
possibilities) i.e.) in the case of two slots two insertion possibilities,
the insertion of the grip into this location at the support requires a
1 b relatively great manipulation precision and especially requires the
careful attention of the dentist. However, such an attention to detail
is undesirable for such hand-held apparatus because the dentist
should be able to concentrate fully on the actual dental work without
having to attend to special manipulation problems for the dental
apparatus he uses.
It is thus understandable that such hand-held apparatus are
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CA 02262229 1999-02-17
carelessly placed onto the treatment table or an auxiliary tray where
the hand-held apparatus is unprotected. The sensitive end of the
light guide is exposed) and) when accidentally catching the
connecting cable between the supply station arid the hand-held
apparatus, the apparatus can be easily pulled off the table and
damaged, especially since the surtaces of the hand-held apparatus
as well as of the table or tray are usually very smooth for reasons of
hygiene.
Accordingly, it is an object of the present invention to provide
a light curing device of the aforementioned kind which is improved
with rQSpect to manipulation and storage so as to be accepted by
dentists as welt as with n?sQect to ergonomic aspects.
Summary of the Invention
A curing device for light-induced curing of dental materials
according to the present invention is primarily characterized by:
a hand-held apparatus containing a light source;
the hand-held apparatus being pistol-shaped comprising a
main body and a grip connected to the main body;
a cable connected to the grip for connecting the hand-held
apparatus to a supply station;
a support for receiving the hand-held apparatus;
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the support detachably connectable to the supply station or
a stand such that the support in which the hand-held apparatus is
received is storable at the supply station or separate from the supply
station.
Advantageously, the support has a bracket for supporting at
least a portion of the main body in front of the grip.
Preferably, the bracket provides slanted supporting surfaces
along both sides of the main body and beneath the main body.
The bracket is preferably comprised of a bent wire and has
two ends insertable into a holder at the supply station or into the
stand.
The cable preferably has plugs for detachably connecting the
cable to the supply station and the grip.
The cable is preferably provided in different lengths such that
an appropriate length is selectable as needed.
The bracket preferably includes two lateral portions and a
curved center portion positioned between the tateral portions.
The bracket is advantageously comprised of a bent wire and
has two lower a»ds. When viewed from the ends, the bracket has
two parallel, upwardly extending legs and first transition portions
extending forwardly in a longitudinal direction of the main body. The
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CA 02262229 1999-02-17
lateral portions are connected to the first transition portions and
extends to the rear of the main body parallel to the longitudinal
direction. The bracket includes two second transition portions
extending downwardly and toward one another and connecting the
lateral portions and the central curved portion.
The lateral portions preferably have a length between the first
and second transition portions that is greater than the width of the
grip in the longitudinal direction.
The length of the valor portions is approximately half the
length of the main body. ,
The grip is preferably received and partly surrounded by the
central curved portion.
Advantageously, the hand-held apparatus is positionable in
the support only in one defined position and the hand-held
apparatus, when incorrectly placed into the support) wilt right itself
relative to the support in order to assume the defined position.
Expediently, the hand-held apparatus has a light guide
having an end portion angled downwardly. The end portion of the
light guide has an end facing the surface of the supply station and
positioned directly adjacent to that surtace when the hand-held
apparatus is received in the support inserted into the holder.
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Between the surface of the supply station and the end face
of the light guide a safety distance of 1 cm to 2 cm is provided.
The support, when inserted into the stand) is plaoeable onto
a table.
The stand has a support plate extending beneath the end
portion of the light guide of the curing device when received in the
support.
The support plate has a clamping device for securing the
support plate at a table.
The present invention also relates to an apparatus for light-
induced curing of dental materials wherein the apparatus Comprises
a supply station and a hand-held apparatus containing a light
source. Preferably, the hand-held apparatus is pistol-shaped and
includes a main body and a grip connected to the main body. A
cable connects the grip of the hand-held apparatus to the supply
station. A support for receiving tire hand-held apparatus is
provided. The support is detachably connectable to the supply
station such that the support in which the hand-held apparatus is
received is storable at the supply station or separate from the supply
station.
According to the present invention, the light curing device is
-6-
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CA 02262229 1999-02-17
supported in a support at the supply station whereby the support for
the light curing device is detachably supported at the supply station
and, when needed, can be removed therefrom. The support
together with the light curing device can thus be stored separate
from the supply station.
According to an especially advantageous embodimer tt of the
invention, the support is embodied such that the hand-held
apparatus Is supported at least partially by the support in front of the
grip whereby it is especially advantageous when the center of
gravity of the hand-held apparatus, when supported on the support,
is positioned above the support such that a vertical line through the
center of gravity is clearly spaced from the edges of the support and
Pxtends through the support. Preferably, a slanted position of the
hand-held apparatus is provided sci that the grip of the hand-held
apparatus points toward the user. However, the sensitive light guide
is well protected because it extends above the supply station. The
angled end portion of the light guide may be facing the supply
station and in this manner is especially protected.
Relative to the surface of the supply station,, the support
together with the light guide and the front end of the hand-held
apparatus thus define a triangle whereby the embodiment of the
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support as a bracket has the additional advantage that the light
curing device when famished with a vibration-sensitive halogen
- lamp as a light source is essentially dampened even when
positioned in the support rather quickly. The light source is thus
exposed to vibrations to a lesser extent as compared to a hand-held
apparatus that is placed quickly onto a hard surface or inserted with
its grip into a support with a fixed bottom portion.
A careful treatment e~f the light source is also important with
respect to dental-techniotogical reasons. It has been observed that
multiple vibrations reduce the service life of the employed halogen
light source substantiaily in the same way as the voltage-controlled
switching action of the tight source resulting in a high current peak.
Inventively) it is thus advantageous that, when a lamp-
protecting switching function for the tight source is provided, the
conventional service life of the light source can be used to the full
extent and that this service life is surprisingly not shortened by
vibrations.
Inventively, the suppcirt is detachably connected to the supply
station. This opens possibilities with respect to separating the
support ftom the supply station and to store the hand-held
' apparatus at a spacing from the supply station. The dentist is thus
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CA 02262229 1999-02-17
able to position the supply station at a remote location, for example,
in a covered location so that it is protected from dust. Within his
working range, the dentist thus has to deal only with the hand-held
apparatus and the support therefor) In this context it is especially
favorable to connect the cable by a detachable plug connection to
the hand-held apparatus and the supply station because then
cables of different lengths can be used in order to provide for a
sirnple adaptation to the respective spaclal requirements.
The support for the light curing device may have different
shapes and, for example, can be a stand made of plastic or metal.
Such a stand can be anchored, for example) in three bores within
the supply station and can then be positioned on a table surface.
The three-point design ensures secure placement onto flat surtaces.
The stand can also have three legs which are elastic and which)
when placed onto a surface, will spread. Also, the stand can be
provided with a single or multiple legs which allow placement onto
a surface.
It is furthermore especially advantageous that the inventive
hand-held apparatus can be easily manipulated by the dentist
without requiring special attention that~would be taken away from
fhe patent in order to be able t0 carry out the precise manipulation
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steps for handling the apparatus, V1lhen placing the hand-held
apparatus onto the support, without the dentist taking special
precautions, especially when the support is slanted and provides a
substantially V-shaped supporting action for the handheld
apparatus, the hand-held apparatus easily and automatically slides
due to the slanted positioning of the support into its defined end
position) even when it is placed onto the support In a slightly canted
ar laterally slightly misaligned manner.
According to a further especially advantageous embodiment
it is suggested to embody the support as a bracket which is
supported on a stand that is independent of the supply station- This
stand can then be conryected to a working surface) for example, by
clamping screws, and the supply station itself is positioned below
the working surface. it is thus out of sight, less susceptible to
95 soiling, and will also not impede other actions to be performed by
the dentist.
In this design the working surface is practically a replacement
for the surface of the supply station and thus provides due to its
arrangement a protection of the relatively sensitive end portion of
the light guide which is therefore less susceptible to soiling.
With the inventive simple and inexpensive means a
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significant improvement of the manipulation of such light curing
devices can be achieved which fulfill to a large degree the
requirements of a dental practice.
It is understood that the precise design of the inventive
bracket can be adapted as needed to a wide range of specifications.
Preferably) the bracket is comprised of two lateral portions
which extend symmetrically to one another and provide a
substantially U or V-shaped support surface which is self centering.
The design can expediently be provided such that a threading
(catching) of the light guide end portion is no longer possible at one
of the lateral portions or the central curved portion, even when the
end portion of the light guide is angled or slanted and pointed
downwardly.
Preferably, the central curved portion is positioned lower so
that the end portion of the light guide cannot catch thereon, even if
the hand-held apparatus is inserted carelessly. '
While the disclosed embodiments show a shape of the lateral
portions that is closed in the forward direction, according to a
modifred embodiment it is also possible to design the lateral
portions such that no forvvard curved transition portions are provided
or to design them such that they extend radially relative to the hand-
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CA 02262229 1999-02-17
held apparatus.
While hand-held apparatus with angled light guide end
portions conventionally have light guides that are rotatable relative
to the apparatus, so that they are useable for light polymerization in
the upper jaw as well as in the lower jaw, the fight guides at the end
of the treatment are sometimes rotated~such that the light guide end
portions face downwardly. ~ This is the most favorite position with
regard to preventing soiling, and in this most common position the
inventive design of a light curing device provides a special
protection for the end portion of the fight guide.
The spacing of the end portion of the light guide to the
surface, i.e., to the surface to the supply station or to the working
surface, is preferably such that even for a maximum spring action
of the bracket and for a respective harsh manipulation of the end
portion of the light guide, the end portion is stiN safely spaced from
the surface, while it is advantageous that in the resting and
unstressed position of the bracket the end portion of the light guide
is at most a few centimeters away from the surface in order to
provide especially good protection of the end portion.
According to a further advantageous embodiment of the
invention it is suggested that the support is comprised of wire which
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CA 02262229 1999-02-17
can be easily cleaned and disinfected and which is easily insertable
into the supply station or a stand. If needed) the bracket made of
wire can be removed and completely introduced into a disinfection
bath. Even when this is not required, the inventive support is any
case easy to clean and has no comers that are prone to soiling, as,
for example the design of German Gebrauchsmuster 92 12 $92.
According to a further especially advantageous aspect of the
invention the surface' of the supply station is curved. This
aesthetically especially pleasing design allows for an alignment of
the surface parallel to the end portion of the light guide.
The Length of the support is preferably somewhat smaller
than the length of the main body of the hand-held apparatus and
substantially smaller than the total length of the hand-held
apparatus inclusive the light guide. This size consideration allows
for a safe supporting action, but provides a compact design of the
inventive bracket.
Preferably, the supply station is a flat element having a height
so that it i:rts into the standardized drawers of dental practice
furniture. Accordingly, it is possible to position the supply station in
such drawers. When removing the cable from the plug-in
connection at the supply station, the light curing device and the
_ 33 .
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support for the sight curing device cen be completely separated from
the supply station and can be stored separately.
. Brief Description of the Drawings
The object and advantages of the present invention will
appear more clearly from the following specfication in conjunction
with the accompanying drawings in which:
Fig. 1 is a perspective view of an embodiment of the
inventnre light curing device, showing the hand-
. held apparatus inserted in the support;
Fig. 2 shows the inventive support in an embodiment
comprising a bracket made of wire;
Fig. 3 shows a perspective view of an embodiment of
the inventive light,curing device in which the
support is inserted into a separate stand.
1 ~ Description of Preferred Embodiments' '
The present invention will now described in detail with the aid
of several specific embodiments utilizing Figs. 1 through 3.
The embodiment of a light curing device 10 represented in
Fig. 1 comprises a supply station 12 and a hand-held apparatus 14
connected by cable 16. The cable 16 is provided at both ends with
plug connections and is supplied in various precut lengths.
-14-
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The hand-held apparatus is subst2~ntiatly pistol-shaped. Its
main body 18 comprises a substantially cylindrical part 20 ending in
a cone 22 and having a transition into a light guide 24.
A grip 26 extends at a slant to the rear and downwardly from
the part 20. It is furnished in a manner known per se with a switch
28 for switching on and off the light source contained in the main
body 18. The end 30 of the light guide 24 is angled and has an end
face 32 which, in the position shown in Fig. 1, points downwardly.
Inventively, a support 34 for the hand-held apparatus is provided
which, in the shown embodiment, is positioned on the supply station
12. The support 34 has a bracket 36 for receiving the hand-held
apparatus 14 whereby the bracket 36 safely supports the main body
18 at the supply station due to its special design.
The bracket 36 has tinro lateral portions 38 and 40 whereby
15~ in Fig. 1 only the lateral portion 38 can be seen while the lateral
portion 40 (shown in Fig, 2) in the representation according to Fig.
1 is covered by the main body 18 of the apparatus 14. The lateral
portions 38 and 40 are connected to one another by a central
curved portion 32. In the position represented in Fig, 1) which is the
. end position of the hand-held apparatus 14 in the support 34, the
central curved portion 42 surrounds the grip 2G on three sides and
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extends practically over the entire length of the grip, when viewed
in the axial or longitudinal direction of the light curing device.
The lateral portions in the shown embodiment are embodied
such that to the front and to the rear they have a first and a second
transitions 44 and 46, as can be seen especially in Fig. 2.
. The supply station 12 has at its surface 48 two bores spaced
from one another into which the two ends of the bracket 36 are
inserted. Since the bracket 36 during manipulation, i.e., when
removing or placing the hand-held apparatus 14, is never loaded
with respect to pulling forces, an insertion of the ends of the bracket
without snap-connection is sufficient whereby it is undet~Stood that,
if needed, such a snap-connection could be provided.
The surface 48 of the supply station 12 is of a special design.
In a plan view the surface 48 is substantially trapezoidal in shape.
The surtace 48 in the vicinity of a shorter side of the trapeze has a
greater curvature than in the vicinity of the longer side. The
curvature of the surface 48 is thus mere pronounced at the shorter
side than at the longer side whereby a harmonic and uniform
transition of the curvature from the short to the long trapeze side is
provided. The design is selected such that the supply station 12
based on its surface shape provides the impression of a
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parallelepiped that is compressed whereby this compression is
greater at one side than at the other.
This design is not only aesthetically especially pleasing) but
also advantageous in that the electric circuits and the supply for the
hand-held apparatus can be without problems housed within the
supply station 12. Furthermore) this design in connection with the
bracket 36 provides excellent protection of the end face 32. When
the bracket 36 at its rear portion is positioned adjacent to the short
trapeze side, the hand-held apparatus remains with slightly more
than its forward half above the supply station. Accordingly, the light
guide 24 does not project forwardly past the front edge 50 of the
supply station 12. Instead) the angled end 30 of the light guide 24
ends at a dawnwardly slanted area of the surface 48 so that the end
face 32 extends substantially parallel to the surface 48.
~ This design allows to position the hand-held apparatus such
that the grip 28 is easily accessible since only the supply station 12
' is below the grip 26, while the end face 32 is still well protected.
The supply station can be adapted in .wide ranges to the
respective requirements. While in the shown embodiment a plug-
connection 52 for the cable 16 is provided whereby the mains
connection 54 as well as the onJoff switch 56 are positioned
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adjacent to one another, it is understood that the arrangement of
these connections and operating elements can be provided in any
suitable design according to the specific requirements. Also, if
needed, venting slots for the optionally needed cooling of a
transformer or of the current and voltage control for supplying the
hand-held apparatus 14 may be provided) preferably at a vertical
wall of the supply station 12. Mowever, the compact design with
small surfaces of the inventive supply station 12 is especially
' preferred and easy to clean.
While the represented embodiment of the inventive light
curing device 94 shows a position in which the bracket 3~ is inserted
into the supply station 12, according to a modified embodiment it is
suggested to provide an auxiliary holder which, if needed, may also
be the only support or holder. Tt~e auxiliary holder is comprised of
a bracket 3fi according to Fig. 2 which is supported in a suitable
manner. For example, the bracket 36 can be inserted into a support
plate which extends .preferably parallel to the hand-held apparatus
14 and extends to a position below the end portion of the light
guide. A respective support plate can be embodied as a cast part
and, for example, can be fastened with clamping screws to a
treatment table while the supply station 12 is stored) preferably
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' covered, for example, in a drawer.
The preferred embodiment of the inventive bracket 36 can be
seen in Fig. 2. From one end 60 of the bracket 36 an upwardly
extending leg 62 projects. The upper end of the upwardly extending
ieg 62 is bent in the forvvard direction and extends substantially
horizontally at a slant to form a front curved transition portion 44.
Here the lateral portion 38 begins and the wire is bent by 180° to
the
rear at the this transition portion 44. The main leg of ahe lateral
portion 38 extends not horizontally but at a slant upwardly,
according to the position of the hand-held apparatus 14 of the
support 34.
At the rear end of the main leg 66, the lateral portion 38 has
a rearward curved transition portion 4C which is bent 180° so that
the wire extends again in the forward direction parallel to the main
leg 62 and provides an auxiliary leg 68 of the lateral portion 38.
The auxiliary leg 68 extends substantially into the area of the
upward portion of the leg 62 and it is then bent toward the central
curved portion 42. The central curved portion 42 extends at a slant
downwardly so that the grip 26 of the hand-held apparatus 14 is
preferably positive-lockingly, with a slight wedging action, received
between the auxiliary leg 68 of the left and the right lateral portions
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38, 40 while the central curved portion 42 provides an abutment in
the forward direction.
By lowering the central curved portion 42 below a plane
defined by the two auxiliary legs 68, it is achieved that fnr a normal
introduction of the hand-held apparatus into the support no contact
between the end portion 30 of the light guide 24 and the central
curved portion 42 is possible.
The lateral portion 40 is symmetrically embodied to the lateral
portion 38 so that bracket 36 ends' by an upwardly extending leg 70
having lower end 72.
In a modified embodiment it is suggested that the forward
transition portion 44 is bent outwardly away from the axis of the
hand-held apparatus 14. In this embodiment the transition portion
between the upward Legs 62, 70 and the forward transition portion
44 is Located at the extension of the auxiliary leg 68 and forms the
forward and lower support surtaoe for the main body 18 of the
apparatus 14. Starting at this support surface, the forward transition
portions 44) in comparison tp the representation of Fig. 2, are bent
outwardly, i.e., radially away from. the hand-held apparatus 14 so
that even for a greatly rotated introduction of the angled end portion
of the light guide there is no risk that the end wilt catch.
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Since, however, this type of introduction in practice is not
very relevant, the shown embodiment of the inventive bracket 36 of
Fig. 2 is preferred.
It is understood that the inventive bracket 36 can be inserted
in the same manner into an additional stand or into the supply
' station 12. 1f needed) it is also possible to simply provide a bracket
36 which) as desired by the customer, i.e., the dentist, can be
interchangeably inserted into the separate stand or the supply
station ~ 2.
According to a further preferred embodiment it is suggested
that the support itself is a stand. In this embodiment, no additional
stand is provided and the support can be removed from the supply
station and pieced onto any planar surface for storage. The support
can) for example, be embodied such that it has three legs arranged
such that even when the hand-held apparatus 14 is inserted, its
. stability is ensured.
Fig. 3 shows a possible embodiment of a stand 80. The
auxiliary stand 80 receives the bracket 36 in Cutouts 82 and 84
which are embodied as bores of sufficient depth in the downward
direction and provide a stable supporting action. Preferably, the
bores 82 and 84 have metallic sleeves which allow for a wear-
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resistant insertion and removal of the bracket 3f> whereby fitting with
respect to the leg 62 and 70 can be ensured without play.
In the shown embodiment the auxiliary stand 80 comprises
a substantially flat, rectangular plate extending overthe entire length
of the tight curing device 14 so that the end portion 30 of the tight
guide is positioned above the auxiliary stand 80 and does not
project in the forward direction past the plate.
The stand 80 can be placed in any suitable manner onto a
support surface. For example, it may embodied as a metal plate so
that, because of its own weight) ~ii provides suffcient stability. it is
also possible to provide the stand 80 with suction cups which
provide a secure storage on any table-tike surtace.
The present invention is, of course, in no way restricted to the
specific disclosure of the specification and drawings, but, also
encompasses~any modifications within the scope of the appended
claims.
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