JP3232155U - Fixed structure of dental handpiece - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fixing structure of a dental handpiece which avoids a problem that a curved case loosens and comes off due to vibration of operation. SOLUTION: The fixing structure of a dental handpiece includes a drive assembly member 11 in which a nose portion 14 is continuously provided, a sleeve 21 which is covered outside the drive assembly member and in which a positioning member 24 is installed. It consists of a case. The case is composed of a front case 32 and a rear case 33, the front case is covered outside the sleeve, the rear case is detachably mounted on one end of the front case, and a push member 36 is installed on the front case. , The push member is penetrated inward and abuts on the positioning member, and the positioning member is tightened with respect to the outer peripheral surface 121 of the drive assembly member, whereby the front case, the sleeve, and the drive assembly member are fixed to each other. Assembled to be done. [Selection diagram] Fig. 1

Description

The present invention relates to an assembled structure of a dental handpiece, and more particularly to a fixed structure of a dental handpiece.

Conventional dental handpieces are usually designed in the shape of a curved rod in which the case is integrally molded so that it can be easily grasped and operated by hand, but it is installed inside the case to operate the nose part. Since the arrangement of the transmission mechanism that drives the vehicle is tight, it is difficult and troublesome to install the transmission mechanism inside the case that has a curved rod shape. However, when designing as a case in which a curved case and an upright case are connected to each other, the stability of engagement between the curved case and the outer cover of the transmission mechanism must be considered, and the curved case and the transmission must be considered. The engagement structure with the outer cover of the mechanism had to be redesigned.

Therefore, the present inventor considered that the above-mentioned drawbacks could be improved, and as a result of diligent research, the curved case was stably positioned on the fixed structure on the outer cover of the transmission mechanism at a simple and high speed, and the curved case was moved by the vibration of the operation. We have found to avoid the problem of loosening and coming off.

The present invention has been developed in view of the above technical problems, and an object of the present invention is to provide a fixed structure for a dental handpiece.

In order to solve the above problems, the fixing structure of the dental handpiece according to a certain aspect of the present invention is used.
A drive assembly member with a continuous nose at one end,
A sleeve that is laid on the outside of the drive assembly member and has a positioning member installed.
It has a curved cylindrical front case and a straight cylindrical rear case, the front case being laid out of the sleeve to cover the drive assembly and the sleeve. The rear case is detachably mounted at one end of the front case that is separated from the nose portion, and a push member is installed in the front case, and the push member is directed toward the inside of the front case. The front case, the sleeve, and the drive assembly member are assembled so as to be fixed to each other by being penetrated and abutting against the positioning member and tightening the positioning member with respect to the drive assembly member. It has a case and.

In a preferred example of the present invention, the drive assembly member is composed of a jacket and a transmission shaft penetrating into the jacket, and a positioning member composed of elastic pieces is installed on the sleeve. The front case has an inner wall in which a screw hole is formed, the positioning member is directed so that the opening direction of the screw hole is inclined, and the push member is screwed into the screw hole. By doing so, one end of the pushing member comes into contact with the positioning member, and the positioning member is tightened with respect to the outer peripheral surface of the outer cover.

In a preferred example of the present invention, the drive assembly member is composed of a jacket and a transmission shaft penetrating into the jacket, the sleeve has a circumferential wall, and the peripheral wall of the sleeve is a sleeve. A sliding groove extending along the axial direction is opened, and the positioning member is internally provided in the sliding groove and is composed of a slider that slides along the sliding groove, and the positioning member has at least one. A through hole is opened, a ball is internally provided in the through hole, the front case has an inner wall, and a screw hole is opened in the inner wall, and the opening direction of the screw hole is inclined. When the positioning member is directed so as to be presented and the pushing member is screwed into the screw hole, one end of the pushing member comes into contact with the positioning member, and the positioning member is pushed into the sliding groove. The steel balls on the positioning member are interlocked with each other and tightened with respect to the inner wall of the front case and the outer peripheral surface of the outer cover.

The description of the present specification and the drawings will clarify at least the following matters.

It is an exploded schematic diagram which shows the fixing structure of the dental handpiece by 1st Embodiment of this invention. It is a schematic outside view which shows the sleeve of the 1st Embodiment of this invention. It is sectional drawing which shows the assembly completion of 1st Embodiment of this invention. It is a partially enlarged schematic diagram which shows the tightening state of 1st Embodiment of this invention. It is an exploded schematic diagram which shows the fixing structure of the dental handpiece by 2nd Embodiment of this invention. It is sectional drawing which shows the assembly completion of the 2nd Embodiment of this invention. It is a partially enlarged schematic diagram which shows the tightening state of the 2nd Embodiment of this invention. It is a partially enlarged schematic diagram which shows the tightened state of the 2nd Embodiment of this invention.

Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. The present disclosure is not limited to the following embodiments, and various forms may be adopted as long as they belong to the technical scope of the present disclosure.
[First Embodiment]

The fixing structure of the dental handpiece according to the first embodiment of the present invention is shown in FIGS. 1 to 4. It is mainly composed of a drive assembly member 11, a sleeve 21, and a case 31.

The drive assembly member 11 is composed of an outer cover 12 and a transmission shaft 13 penetrating the outer cover 12, and a nose for mounting a dental instrument (not shown) at one end of the outer cover 12. The parts 14 are connected in series. The transmission shaft 13 has a first end 131 and a second end 132 opposite to the first end 131, and the transmission shaft 13 is connected to the nose portion 14 by the first end 131 to form the transmission shaft 13. The second end 132 extends outward from the other end of the outer cover 12.

The sleeve 21 has a hollow tubular shape and has a circumferential wall 22, and the sleeve 21 is covered so that the inner peripheral surface of the circumferential wall 22 corresponds to the outer cover 12 of the drive assembly member 11. Further, a groove portion 23 having a substantially U shape is provided on the circumferential wall 22 of the sleeve 21, and the sleeve 21 is integrally molded with a positioning member 24 having an elastic member form in a region surrounded by the groove portion 23. ing.

The case 31 is configured by interconnecting a front case 32 having a curved cylindrical shape and a rear case 33 having a straight cylindrical shape, and the front case 32 is covered outside the sleeve 21. And covers the drive assembly member 11 and the sleeve 21. The front case 32 has an opening 321 that is separated from the nose portion 14, and one end of the rear case 33 is removably mounted in the opening 321 of the front case 32. A drive assembly member 34 is internally provided in the rear case 33, a drive gear disk 341 is connected to the second end 132 of the transmission shaft 13, and the drive gear disk 341 of the drive assembly member 34 is connected to the drive assembly member 34. When driven and rotated, the transmission shaft 13 of the drive assembly member 11 is also interlocked so as to rotate synchronously. The front case 32 has an inner wall 35 inside, and a screw hole 351 formed of a screw hole is opened in the inner wall 35, and the sleeve is formed so that the opening direction of the screw hole 351 is inclined. The positioning member 24 of 21 is directed. The push member 36 composed of bolts is screwed into the screw hole 351 and one end of the push member 36 is penetrated toward the inside of the front case 32 by screwing the push member 36. At the same time, the positioning member which comes into contact with the positioning member 24 and exhibits an elastic member form is tightened to the outer peripheral surface 121 of the outer cover 12 of the drive assembly member 11.

Referring to FIG. 4, when actually using the first embodiment of the present invention having the above-mentioned structure, the user screwes the push member 36 located in the front case 32. The positioning member 24 is pressed by the pushing member 36 and is tightly attached to the outer peripheral surface 121 of the outer cover 12. As a result, the user can more easily install and fix the front case 32, the sleeve 21, and the outer cover 12 of the drive assembly member 11 by fixing them to each other and assembling them. The problem that the front case 32 loosens and comes off due to the vibration of the operation is effectively avoided.
[Second Embodiment]

Further, FIGS. 5 to 8 show a second embodiment of the fixed structure of the dental handpiece according to the present invention, and the difference from the first embodiment described above is that the structural form of the positioning member is slightly different. .. In the second embodiment, the peripheral wall 22 of the sleeve 21 is provided with a sliding groove 23b extending along the axial direction of the sleeve 21, and the positioning member 41 is internally provided in the sliding groove 23b. It is composed of a slider that slides along the sliding groove 23b. At least one through hole 42 is formed in the positioning member 41, and a ball 43 is internally provided in the through hole 42. The positioning member 41 has a back surface 411 facing the rear case 33, and an engaging portion 412 is recessed at the center position of the back surface 411 toward the nose portion 14. The opening direction of the screw hole 351 of the front case 32 is directed toward the engaging portion 412 of the positioning member 41 so as to exhibit an inclined shape, and one end of the push member 36 screwed into the screw hole 351 is said. It penetrates toward the inside of the front case 32 and comes into contact with the engaging portion 412 of the positioning member 41. A fitting groove 352 is recessed in the inner wall 35 of the front case 32 with respect to the ball 43, and one end of the fitting groove 352 facing the nose portion 14 is an inclined surface 353 so that the inner wall 35 of the front case 32 is recessed. Is connected to. As shown in FIGS. 7 and 8, when the pushing member 36 is screwed, one end of the pushing member 36 pushes the positioning member 41 toward the nose portion 14 along the sliding groove 23b. The ball 43 is interlocked so as to engage with the inclined surface 353 of the fitting groove 352. Due to the pressing of the pushing member 36 and the contact of the inclined surface 353, the steel ball 43 of the positioning member 41 is brought into the fitting groove 352 of the inclined portion 122 and the front case 32 on the outer peripheral surface 121 of the outer cover 12. It is tightened with respect to a certain inclined surface 353. Similarly, by fixing and assembling the front case 32, the sleeve 21, and the outer cover 12 of the drive assembly member 11 to each other, the user can install and fix the front case 32 more easily. The problem that the front case 32 loosens and comes off due to the vibration of the operation is effectively avoided.

Further, in this embodiment, with reference to FIGS. 5 to 8, a position limiting hole 354 located in the vicinity of the screwing hole 351 is further provided in the inner wall 35 of the front case 32. Similarly, the position limiting hole 354 is also composed of screw holes, and the position limiting member is formed of bolts so that the opening direction of the position limiting hole 354 is directed toward the back surface 411 of the positioning member 41 so as to exhibit an inclined shape. 37 is screwed into the position limiting hole 354. One end of the position limiting member 37 is penetrated toward the inside of the front case 32 and is in contact with the back surface 411 of the positioning member 41. As a result, by adjusting the screwing position of the position limiting member 37, it is possible to adjust and have the effect of limiting the backward movement stroke of the positioning member 41.

The present invention can be implemented in various other forms without departing from its spirit or key characteristics. Therefore, the above embodiments are merely exemplary in all respects and should not be construed in a limited way. The scope of the present invention is shown by the scope of claims for utility model registration, and is not bound by the text of the specification. Furthermore, all modifications and changes that belong to the equivalent scope of the utility model registration claims are within the scope of the present invention.

11 Drive assembly member 12 Outer cover 121 Outer surface 122 Inclined part 13 Transmission shaft 131 First end 132 Second end 14 Nose part 21 Sleeve 22 Circumferential wall 23 Groove part 23b Sliding groove 24 Positioning member 31 Case 32 Front case 321 Opening 33 Rear Case 34 Drive assembly member 341 Drive gear disk 35 Inner wall 351 Screw hole 352 Fitting groove 353 Inclined surface 354 Position limiting hole 36 Pushing member 37 Position limiting member 41 Positioning member 42 Through hole 43 Ball 411 Back surface 412 Engaging part

Claims (6)

A drive assembly member with a continuous nose at one end,
A sleeve that is laid on the outside of the drive assembly member and has a positioning member installed.
It has a curved cylindrical front case and a straight cylindrical rear case, the front case being laid out of the sleeve to cover the drive assembly and the sleeve. The rear case is detachably mounted at one end of the front case that is separated from the nose portion, and a push member is installed in the front case, and the push member is directed toward the inside of the front case. The front case, the sleeve, and the drive assembly member are assembled so as to be fixed to each other by being penetrated and abutting against the positioning member and tightening the positioning member with respect to the drive assembly member. A fixed structure for a dental handpiece that features a case and. The drive assembly member is composed of an outer cover and a transmission shaft penetrating into the outer cover, and a positioning member composed of an elastic piece is installed on the sleeve, and the front case has a screw hole. It has an inner wall that is open, the positioning member is directed so that the opening direction of the screw hole is inclined, and the push member is screwed into the screw hole to form the push member. The fixing structure for a dental handpiece according to claim 1, wherein one end abuts on the positioning member, and the positioning member is fastened to the outer peripheral surface of the outer cover. The sleeve has a circumferential wall, the inner peripheral surface of the peripheral wall is covered so as to correspond to the outer cover of the drive assembly member, and the peripheral wall of the sleeve has a substantially U shape. The fixing structure for a dental handpiece according to claim 2, wherein the groove portion is opened, and the sleeve is integrally molded with a positioning member exhibiting an elastic member form in a region surrounded by the groove portion. .. The drive assembly member is composed of an outer cover and a transmission shaft penetrating into the outer cover, the sleeve has a circumferential wall, and the peripheral wall of the sleeve extends along the axial direction of the sleeve. The sliding groove is opened, the positioning member is internally provided in the sliding groove, and is composed of a slider that slides along the sliding groove, and at least one through hole is opened in the positioning member, and the positioning member is formed. A ball is internally provided in the through hole, the front case has an inner wall, and a screw hole is formed in the inner wall, and the positioning member is arranged so that the opening direction of the screw hole is inclined. When the pushing member is oriented and screwed into the screw hole, one end of the pushing member comes into contact with the positioning member, and the positioning member is pushed to slide along the sliding groove, and the positioning is performed. The fixing structure for a dental handpiece according to claim 1, wherein the steel balls in the member are interlocked and fastened to the inner wall of the front case and the outer peripheral surface of the outer cover. The positioning member has a back surface facing the rear case, and an engaging portion is recessed in the back surface toward the nose portion, and the opening direction of the screw hole of the front case is inclined. The engaging portion of the positioning member is directed so as to exhibit a shape, and the front case is provided with a fitting groove on the inner wall with respect to the ball, and the fitting groove has an inclined surface at one end facing the nose portion. When the pushing member pushes and slides the positioning member, the balls are interlocked and engaged with the inclined surface of the fitting groove, and are attached to the positioning member. The fixing structure for a dental handpiece according to claim 4, wherein the steel ball is fastened to the outer peripheral surface of the outer cover. A position limiting hole located in the vicinity of the screwed hole is further opened on the inner wall of the front case, and the opening direction of the position limiting hole is directed to the back surface of the positioning member so as to be inclined. The claim is characterized in that the limiting member is installed in the positioning hole, and one end of the positioning member is penetrated toward the inside of the front case and is in contact with the back surface of the positioning member. Item 5. The fixed structure of the dental handpiece according to item 5.

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