JPH0111217Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a composite resin that is injected into a tooth or a tooth using a strip by reciprocating a holder with a strip stretched between both ends using power. It relates to a strip head for polishing.

(Configuration of conventional example and its problems) Figure 1 shows the configuration of a conventional strip handpiece. 1 is a motor case in which an electric motor (not shown) is installed, and 2 is a motor case from which the electric motor (not shown) is installed. A motion direction conversion mechanism (not shown) that converts the transmitted rotational motion into reciprocating motion in the centerline direction
and a chuck (not shown) attached to the tip of the motion direction changing mechanism.The grip case 2 is detachably attached to the tip of the motor case 1. 3 is a U-shaped arcuate holder with tightening screws 4 attached to both ends, 5 is a shank integrally attached to the upper end of holder 3, and 6 is a holder with tightening screws 4 attached to each end. This is a band-shaped strip that is fixed to the end of the holder 3 and stretched between both ends of the holder 3.

In the conventional example configured in this way, when the electric motor is rotated, the holder 3 with the shank 5 fixed on the chuck moves back and forth in the direction of the center line of the gripping case 2 (approximately left and right direction in the figure). When the strip 6 stretched over the tooth 3 is brought into contact with the tooth or the composite resin injected into the tooth, the tooth or the composite resin is polished by the strip 6. By the way, the holder 3 to the grip case 2
Since the mounting direction of the holder 3 and the moving direction of the holder 3 are the same, when polishing between the front teeth, the gripping case 2 is positioned in front of the mouth and can be freely operated. Front teeth can be polished arbitrarily. However, when polishing the interdental space between the back teeth, the gripping case 2 is located on the side of the mouth and hits the corner of the mouth, so the gripping case 2 cannot be operated freely, and the back teeth can be polished arbitrarily. There was a defect that it could not be polished. In addition, as shown in FIG. 2, the gripping case transmits the driving force of the motor case 1 to a head 7 equipped with cutting tools, polishing tools, etc., via an internal rotating shaft (not shown). Although the grip case 8 is generally used, in this conventional example,
Since a dedicated gripping case 2 equipped with a movement direction changing mechanism must be used instead of the gripping case 8, the manufacturing cost increases, and when in use, the motor case 1 and the holder 3 must be attached and removed each time. Since it has to be done separately, it has the disadvantage of being complicated to handle.

(Purpose of the invention) The purpose of the invention is to provide a strip head that can polish back teeth as desired and is easy to handle.

(Structure of the invention) In the invention, the holder is attached to the holding case so as to be able to reciprocate in a direction perpendicular to the direction in which the holder is attached to the gripping case.

(Description of Embodiment) FIGS. 3 to 7 show the structure of an embodiment of the present invention, in which reference numeral 9 has an engaging groove 10 recessed in the center in a direction perpendicular to the direction of movement. (See Figure 4)
It also includes a U-shaped arched main body 12 with engaging parts 11 formed at both ends (see FIG. 5), and a release lever 1.
A meshing part 14 whose one end part 3 projects forward of the upper part of the main body 12 and meshes with the meshing part 11 of the main body 12.
A pair of meshing bodies 15 (see FIGS. 5 and 6) formed at the other end thereof, and a pair of meshing bodies 15 pivotally supported on the main body 12 so as to be swingable, are meshed with the meshing portion 11 of the main body 12. A holder 17 includes a compression spring 16 (see FIG. 5) that biases the engaging portion 14 of the body 15 in the direction of engaging with each other, and a gear 18 is fixed to one end, and an engaging protrusion 19 is protruded from the other end. 21 is a mounting shaft to which a rotary body 20 is fixedly mounted; 21 is a mounting shaft to which a rotating shaft 17 is rotatably mounted via a bearing 22; 23 is a mounting shaft that movably holds the main body 12 of the holder 9; This is a holding case installed in a direction perpendicular to the moving direction of the main body 12, and the mounting shaft 21 is attached to this holding case 23.
When the engaging protrusion 19 is attached to the engaging groove 10
will be involved. 24, each end is the meshing part 1
1 and 14 and stretched between both ends of the holder 9 (see Fig. 6)
It is.

In this embodiment configured in this way, first, the mounting shaft 21 is attached to the tip of the gripping case 8 (see FIG. 2), and the rotating shaft 17 is connected to the motor through the rotating shaft of the gripping case 8. Connect to the driving shaft of case 1 (see Figure 2). Next, when the electric motor is rotated and the engagement protrusion 19 is rotated together with the rotating shaft 17, the main body 12 of the holder 9 is perpendicular to the center line direction (approximately horizontal direction in the figure) of the gripping case 8. When the strip 24 stretched between both ends of the holder 9 comes into contact with the tooth or the composite resin injected into the tooth, the tooth or the composite resin is moved by the strip 24. polished. Furthermore, when one or both of the release levers 13 is pressed against the spring force of the compression spring 16 with the hand holding the grip case 8, the engaging portion 1
1 and 14 open, and the strips 24 can be attached and detached with one touch.

(Effects of the invention) As explained above, according to the invention, the direction of the center line of the rotating shaft and the direction of movement of the holder are perpendicular, so when polishing between the teeth of the front teeth, the gripping case is Although it is located on the side of the mouth, the front teeth are located at the front of the mouth, so the gripping case rarely hits the corner of the mouth, and if the gripping case does hit the corner of the mouth, the gripping case By reversing the direction of insertion into the mouth, the gripping case can be operated freely, allowing the front teeth to be polished as desired.Furthermore, when polishing the interdental space between the back teeth, the gripping case can be positioned at the front of the mouth. , so you can freely operate the grip case.
It has the advantage of being able to polish the back teeth as desired. In addition, the gripping case can be used as is by replacing the head, without using a special gripping case equipped with a movement direction main mechanism that converts rotational motion into reciprocating motion. This has the advantage of reducing the economic burden on the user. Furthermore, since the strip head of the present invention can be easily attached and detached from the grip case with a single touch, instruments can be replaced easily and quickly, and instruments can be cleaned, sterilized, and maintained easily and easily. The advantage is that it can be done quickly. Furthermore, by providing a pair of release levers for the engaging bodies that are individually swingably attached near both ends of the main body, with their tips close to each other at the front of the upper part of the main body, both engaging parts can be moved together with one hand. Alternatively, since the strips can be opened and closed individually, there is an advantage that the strips can be attached and detached easily, quickly and reliably. Further, when in use, only the head needs to be attached and detached, and the strips can be attached and detached with a single touch, so there is an advantage that handling is easy.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a conventional strip handpiece, Fig. 2 is a block diagram of a conventional handpiece, and Fig. 3 is a partially cutaway plan view of an embodiment of the present invention.
Figure 4 is a cross-sectional view taken from line A-A in Figure 3;
The figure is a side view of one embodiment of the present invention, FIG. 6 is a front view of one embodiment of the present invention, and FIG. 7 is a sectional view taken along the line B--B of FIG. 3. 1...Motor case, 2, 8...Gripping case,
3, 9...Holder, 6,24...Strips,
10... Engaging groove, 11, 14... Engaging portion, 12...
...Main body, 13...Release lever, 15...Matching body,
16... Compression spring, 17... Rotating shaft, 19... Engaging protrusion, 23... Holding case.

Claims (1)

[Claims for Utility Model Registration] When a mounting shaft is attached to the tip of the gripping case, a rotary shaft rotatably held by the mounting shaft is connected to the drive shaft of the gripping case and driven to rotate. The head includes an arcuate main body with engaging parts formed at both ends, and an engaging part formed at the lower part that engages with the engaging parts of the main body, and a shaft support for swinging in the vicinity of both ends of the main body. a pair of engaging bodies, a release lever integrally provided at the upper part of the engaging body with tips thereof close to each other in front of the upper part of the main body, and an engaging part of the main body and an engaging part of the engaging body. By urging the meshing body in the meshing direction, both ends of a band-shaped strip for polishing the outer wall of the tooth or the filling material for the tooth are connected to the meshing portion of the main body and the meshing portion of the meshing body. a holder comprising a spring member held by the mounting shaft; a holding case that holds the main body of the holder at the tip of the mounting shaft so as to be able to reciprocate in a direction perpendicular to the center line of the rotating shaft; The stripping head is further provided with a motion direction changing mechanism that reciprocates the holder in a direction perpendicular to the center line of the rotation shaft.