JP2008307248A - Connector and dental handpiece device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connector and a dental handpiece device, where the connector is easily applicable to not only an existing handpiece but a handpiece of the type that installs an LED at its head. <P>SOLUTION: The connector 1 is provided with a base-side connector 1A connected to a tube C equipped with a driving medium passage, a tip-side connector 1B for connecting a dental handpiece body 2 where a driving medium passage 4a for driving a dental treatment tool 3 installed on a tip head 2A is incorporated in it, the dental handpiece body 2 being connected so as to be detachable and rotatable around the axis center, and a driving medium communication passage 1a to communicate with the driving medium passage in the tube with the driving medium passage 4a in the handpiece body. An electric socket 7 is provided at the tip-side connector. A structure is used that a cylindrical contact member 8 including a lamp unit 16 and an electric ring contact 8a can be replaceably installed on the socket 7. The dental handpiece device A is made up by fitting the cylindrical contact member with this connector and connecting the handpiece body with an LED 5 provided near the head. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a connecting member for connecting a tube having a drive medium passage and a dental handpiece main body provided with a dental medical tool, and a dental handpiece device configured using the connecting member.

  A dental handpiece has a dental medical tool (cutting tool, scaler, etc.) attached to the distal end head portion, and this tool is applied to teeth to perform medical care. For this reason, a driving medium for operating the tool ( Air, electricity, etc.) is supplied to the tool driver (air turbine, micromotor, ultrasonic oscillator, etc.) through the body of the dental handpiece. More specifically, a flexible tube in which the drive medium passage is built, a connecting member connected to the tube, and a dental handpiece main body detachably connected to the front side of the connecting member. Composed. A passage for supplying a drive medium for operating the dental medical tool is formed in the dental handpiece body, and both drive media are connected to the connecting member when the tube and the handpiece body are connected. A drive medium communication passage for communicating the passage is formed. In addition, the connection part of the handpiece main body part to the connection member is connected in a state where the handpiece main body part can be rotated around the axis in consideration of the handleability of the handpiece main body part which is a grasping part of the operator. It is configured to be.

And in the hand piece as described above, there is often used one provided with illumination means for illuminating the vicinity of the tip of the tool from the vicinity (neck) of the tip head. Patent Documents 1 to 3 disclose examples of dental handpieces equipped with such illumination means. In the dental handpiece disclosed in Patent Document 1 and Patent Document 2, a light source (lamp, light-emitting diode (hereinafter, referred to as LED), etc.) is disposed on the front side of a member corresponding to the above-described connecting member. The light is guided to the vicinity of the head portion through a light guide incorporated in the handpiece main body portion, and irradiated from the neck portion toward the medical purpose site (tip portion of the tool). In addition, the dental handpiece disclosed in Patent Document 3 has an LED arranged on the neck of the head so as to illuminate the medical purpose site, and the LED electric wire built into the handpiece main body is a connecting member (coupling). It is comprised so that it may be electrically connected with the electric wire of a power supply side in the connection part.
Japanese Utility Model Publication No. 4-48175 JP 7-328032 A JP 10-337292 A

  In the case of the dental handpiece disclosed in Patent Document 1 and Patent Document 2, the light from the light source disposed on the connection member is guided to the vicinity of the tip head portion by the light guide, and from the neck portion to the target site. Since it is made to irradiate, there is not a little light loss in the light guide, and the cost is high. In addition, in the case of the handpiece of Patent Document 3, an LED is disposed in the vicinity of the head portion of the head portion, and the target portion is irradiated directly from the LED without using a light guide, so that light loss due to light guide is reduced. In addition, the cost is not high, and its versatility is increasing recently. However, since the former handpiece (light guide type) and the latter handpiece (neck LED installation type) are not compatible with each other, the user who uses the former handpiece is the latter. If you want to introduce a new handpiece, you must replace the handpiece body and connection member as a set, and you must remove the connection member and handpiece body from the tube and replace them. In the case where the member and the tube are connected and integrated, the tube and the tube must be replaced, and there is a problem in that the replacement part cost increases and the replacement handling is complicated.

  The present invention has been made in view of the above, and a connection member that can easily apply an existing handpiece device to a handpiece of a neck LED installation type, and a dental hand configured using the connection member An object is to provide a piece device.

  A connecting member according to a first aspect of the present invention is a dental hand in which a base side connecting portion to which a tube in which a driving medium passage is installed is connected, and a driving medium passage for a dental medical tool attached to a distal end head portion is provided. A drive medium communication for communicating the front side connection part for connecting the piece main body part detachably and rotatably about the axis, and the drive medium path in the tube and the drive medium path in the handpiece main body part. A connecting member having a passage, wherein the front-side connecting portion is provided with an electrical socket portion for a lighting fixture, and a cylindrical contact member having a lamp unit and an electrical ring contact is attached to and detached from the socket portion. It is configured to be replaceable. The ring contact is formed on the peripheral surface or the tip surface of the cylindrical contact member.

  The connection member according to the present invention connects the handpiece main body portion, in which the cylindrical contact member is mounted to the socket portion, and an LED electric wire provided in the vicinity of the head portion is installed to the front side connection portion. In this case, the ring contact of the cylindrical contact member and the electric wire can be electrically connected.

  In addition, a dental handpiece device according to a second aspect of the present invention is a dental handpiece connected to any one of the above connecting members and to the front side connecting portion of the connecting member so as to be detachable and rotatable about an axis. A dental handpiece device comprising a main body, wherein the handpiece main body includes a driving medium passage for a driving body for driving a dental medical tool attached to a distal end head, and a vicinity of the head A light-emitting diode wire provided on the base, and a base-side input contact portion of the wire, and the cylindrical contact member is mounted on the socket portion of the connection member, and the handpiece body portion is attached to the front-side connection portion. Are connected, the drive medium communication path in the connection member and the drive medium path in the handpiece body are connected in communication, and the ring contact of the cylindrical contact member and the input contact portion are electrically connected. This Accordingly, characterized in that it is configured to power supply to supply and the LED driving medium to said drive member is performed.

  According to the dental handpiece device according to the first invention and the dental handpiece device according to the second invention, the front-side connection is performed in a state in which the tube having the drive medium passage is connected to the base-side connection portion of the connection member. When the dental handpiece main body with the drive medium passage installed therein is connected, the drive medium passage in the tube and the drive medium passage in the handpiece main body are connected to each other by the drive medium communication passage in the connecting member. The Therefore, a supply system for the drive medium to the drive body of the dental care tool attached to the distal end head portion of the handpiece main body is established, and the desired drive of the dental care tool is enabled by the switch operation. In addition, the handpiece main body is connected to the connecting member so as to be pivotable about the axis, so that when carrying out dental treatment by gripping this, the handpiece body portion is good in handling and accurate dental treatment even in a narrow oral cavity. Can perform medical work. In the case of an existing handpiece device in which a lamp unit is attached to the socket portion and a light guide that extends in the vicinity of the head portion is built in and connected to the front side connection portion, the lamp unit is used. Since the light from the light passes through the light guide and is irradiated from the vicinity of the head portion to the vicinity of the tip portion of the dental care tool, the above-mentioned dental care work is more accurately performed.

  Further, instead of the lamp unit, a cylindrical contact member having an electrical ring contact can be mounted on the socket part. Therefore, an LED is provided in the neck part near the head part, and the electric wire for the LED is installed. The handpiece main body portion can be used by connecting to the front side connection portion. In this case, similarly to the above, the drive medium communication path in the connection member and the drive medium path in the handpiece body are connected in communication, and a supply system of the drive medium to the drive body of the dental medical tool is established. At the same time, the ring contact of the cylindrical contact member and the input contact portion of the electric wire in the handpiece main body are electrically connected, and an energization supply system to the LED is established. Light irradiation to the vicinity is possible. In particular, since the LED is miniaturized, it can be provided in the vicinity of the head portion. Therefore, it is possible to irradiate the medical target site directly from the closest position, and the light guide loss as in the case of using the light guide. There is no need to use an expensive member such as a light guide, and the light guide is used in the handpiece main body. There is no need to secure a large space.

  In this way, instead of the lamp unit, a cylindrical contact member is attached to the socket portion, and the handpiece body portion in which the LED is provided at the neck portion in the vicinity of the head portion is connected to the front side connection portion of the connection member, thereby The light guide type handpiece can be replaced with a neck LED installation type handpiece. The replacement operation is not troublesome, and the replacement part cost can be significantly reduced as compared with the case where the connection member and the tube are also replaced as a set. Therefore, for the user who uses the light guide type handpiece, the switching to the neck LED installation type handpiece is performed smoothly, which is extremely beneficial.

  Hereinafter, the best mode of the present invention will be described with reference to the drawings. 1 is a cross-sectional view of an embodiment of the dental handpiece device of the present invention, FIG. 2 is an enlarged view of a portion X in FIG. 1, FIG. 3 is an enlarged view of a Y portion in FIG. FIG. 5 is a cross-sectional view of a connecting member in the dental handpiece device, and FIG. 6 is a conceptual diagram illustrating an example of a lamp unit attached to the connecting member. FIGS. 7A and 7B are diagrams conceptually showing an example of a cylindrical contact member mounted on the connection member, FIG. 7A is a sectional view, and FIG. 7B is a plan view. . FIGS. 8A and 8B are views conceptually showing another example of a cylindrical contact member, where FIG. 8A is a plan view and FIG. 8B is a right side view thereof. FIGS. 9A and 9B are views conceptually showing still another example of the cylindrical contact member, where FIG. 9A is a plan view and FIG. 9B is a right side view thereof.

  A dental handpiece device A shown in FIGS. 1 to 3 is an air turbine handpiece, and is a connecting member 1 and a dental hand that is detachably connected to the connecting member 1 and pivotable about an axis. It consists of a piece body 2. As shown in FIG. 3, the connecting member 1 includes a base-side connecting portion 1A to which a tube C in which an air supply conduit (driving medium passage, not shown) is internally connected, and a dental practice attached to the distal head portion 2A. A dental handpiece main body 2 in which an air pipe (driving medium passage) 4a for an air turbine (driving body) 4 for driving the tool 3 is mounted is detachably connected to be rotatable about an axis. A front connection portion 1B for the purpose, and an air (drive medium) communication passage 1a for communicating the air supply conduit in the tube C and the air conduit 4a in the handpiece main body 2. The air communication path 1a is formed in the cylindrical base body 1C of the connecting member 1 along the longitudinal direction, and the front side thereof communicates with a circumferential groove 1b formed on the peripheral surface of the front end portion of the base body 1C. When the portion 2 is connected, the air passage 4a in the handpiece main body 2 is communicated with the peripheral groove 1b. Also, an air supply plug 1c that is inserted into and connected to the air supply conduit in the tube C via the socket C1 to the base side connection 1A of the connection member 1 on the base side of the air communication path 1a. Is installed.

  The handpiece main body 2 incorporates an air turbine 4 in its head portion 2A, and a dental medical tool (such as a cutting tool) 3 is detachably attached to a chuck portion (not shown) provided in the air turbine 4. The handpiece body 2 is internally provided with the air conduit 4a for driving the air turbine 4 as described above. However, the water injection conduit 4b or the cooling air conduit for cooling and washing the medical site to be treated is provided. (Not shown) is also furnished. The cooling / cleaning water and cooling air discharge ports (not shown) are common or close to each other so that they can be discharged from the bottom surface of the head portion 2A toward the medical treatment target at the tip of the dental medical tool 3. It is provided so that both are discharged at the same time to form a mist or individually discharged. Further, an LED 5 for illumination is installed near the head of the head portion 2A so that its optical axis is directed to the vicinity of the tip of the dental medical tool 3, and an electric wire 6 for supplying power to the LED 5 is also provided. The handpiece body 2 is internally provided. The space portion excluding the turbine driving air pipe 4 a, the water injection (cooling air) pipe 4 b and the electric wires 6 in the handpiece main body 2 is a return air passage (driving medium) of used air in the air turbine 4. (Passage) 2a.

  When the handpiece main body 2 is connected to the connection member 1, the water injection (cooling air) pipe line 4b includes a circumferential groove 1d (1d ') formed on the front peripheral surface of the base 1C of the connection member 1 and Water (cooling air) supply plug attached to the base side connection portion 1A of the connection member 1 through a water supply (cooling air) communication path (not shown) formed in the base body 1C along the longitudinal direction. It leads to the plug 1e (1e '). By inserting and connecting this plug 1e (1e ') to a water (cooling air) supply pipe (not shown) in the tube C via a socket C2, water (cooling air) is supplied from the tube C. A system is formed. Further, when the handpiece body 2 is connected to the connection member 1, the return air passage 2a is dug along the longitudinal direction in the circumferential groove 1f formed in the front peripheral surface of the base body 1C and the base body 1C. A return air plug (not shown) attached to the base side connection portion 1A of the connection member 1 is communicated through the formed return air communication passage (drive medium communication passage, not shown). This plug is inserted into and connected to a return air pipe (drive medium path, not shown) in the tube C via a socket (not shown), so that used air is discharged outside the apparatus via the tube C. An exhaust system is formed. O-rings 1g are mounted on both sides of each of the circumferential grooves 1b, 1d (1d '), 1f to prevent leakage of each medium and the like when the handpiece body 2 is connected to the connecting member 1, and so on. A supply system and an exhaust system are established.

  The electric wire 6 for the LED 5 built in the handpiece main body 2 is composed of plus and minus two electric wires, and the base side input contact portion 6a is formed concentrically on the base side of the handpiece main body 2. A cylindrical wall portion of the cylindrical portion 2b is pierced in the radial direction, and its input contact terminal 6aa is provided in an elastically biased state in the centripetal direction of the cylindrical portion 2b by a compression coil spring 6ab. When the handpiece body 2 is connected to the connecting member 1, the cylindrical portion 2 b is mounted on the electrical socket 7 provided concentrically with the front-side connecting portion 1 B of the connecting member 1 and the socket 7. The cylindrical contact member 8 is formed so as to be received. The connection relationship between the handpiece body 2 and the connection member 1 is such that both are concentric and the handpiece body 2 is rotatable about its axis. Accordingly, the cylindrical portion 2b is also rotatable around the axis of the cylindrical contact member 8, and the two input contact terminals 6aa and 6aa are formed on the peripheral surface of the cylindrical contact member 8 by this rotation. The two ring contacts 8a, 8a are always elastically contacted to maintain an electrically conductive state.

The electrical socket portion 7 is provided concentrically at the distal end portion of the base 1C in the front side connection portion 1B of the connection member 1, and faces the cylindrical socket portion main body 7a and the inner cylinder portion of the socket portion main body 7a. Two positive and negative output terminals 7b having a spring property are provided, and two electric wires 7c are electrically connected to the output terminal 7b. The electric wire 7c is inserted into the base 1C of the connecting member 1 and fixedly connected to an electric plug terminal 7d attached to the base side connecting portion 1A of the connecting member 1. The electrical plug terminal 7d can be electrically connected to an electric wire (not shown) built in the tube C via a socket C3. A male thread ring 1Aa is fitted and fixed to the periphery of the base body 1C in the base side connection section 1A of the connection member 1, and the female thread section of the female thread ring C4 provided at the tip of the tube C is screwed to the male thread section of the male thread ring 1Aa. By connecting, the connection member 1 and the tube C are detachably connected.
Note that a battery may be built in the connecting member 1 and the electric wire 7c may be connected to the battery so that the LED 5 is supplied with electricity. In this case, the electric wire for LED5 in the tube C becomes unnecessary.

  Next, a connection structure between the connection member 1 and the handpiece main body 2 will be described. As shown in FIG. 3, a ball holding ring 9 having a plurality of ball holding holes 9a spaced in the circumferential direction is screwed and fixed to the base body 1C of the front side connecting portion 1B of the connecting member 1, and each ball holding hole 9a is screwed. A plurality of balls 9b are held so as to be able to appear and retract in the radial direction of the base 1C. An operation sleeve 10 is loosely fitted on the outer side of the ball holding ring 9 by a compression coil spring 11 toward the front side of the connection member 1 in an elastically biased state. The compression coil spring 11 is elastically mounted between a ball regulating protrusion 10a formed on the inner circumferential surface of the operation sleeve 10 along the circumferential direction and an adjustment nut ring 12 screwed and fixed to the base 1C. Normally, the operating sleeve 10 is elastically biased toward the front side of the connecting member 1 by the elasticity of the compression coil spring 11 and is stopped against the stopper portion 9c of the ball holding ring 9. In this stopped state, the ball 10b is regulated by the ball regulating ridge 10a and is prevented from being pulled out in the centrifugal direction. When the operation sleeve 10 is operated to the base side of the connection member 1 against the elasticity of the compression coil spring 11, the operation sleeve 10 is formed on the front side of the operation sleeve 10 adjacent to the ball regulating protrusion 10a. The large-diameter step portion 10b moves to the outer peripheral portion of the held ball 9b, and the ball 9b is released from the restriction and is allowed to be extracted in the centrifugal direction.

  A connection ring 13 having a circumferential groove 13 a formed on the outer peripheral surface thereof is locked and fixed to the base side end of the handpiece main body 2 by screwing of an attachment fixing screw ring 14. The connection ring 13 is formed in a shape and size that can be fitted into a gap between the inner peripheral surface of the ball holding ring 9 and the outer peripheral surface of the base 1C. The cylindrical portion 2b of the handpiece main body 2 is further extended with a fitting cylindrical portion 2c extending to the base side, and the fitting cylindrical portion 2c has an inner diameter at the front side connecting portion 1B of the connecting member 1. The outer diameter of the base 1C is substantially the same as or slightly larger.

  When the handpiece main body 2 is connected to the connecting member 1, the operation sleeve 10 is operated to push the base side against the elasticity of the compression coil spring 11, and the connecting ring 13 is connected to the ball holding ring of the connecting member 1. 9 is fitted into the gap between the base body 1C and the fitting cylindrical portion 2c is externally fitted to the base body 1C. At this time, the ball 9b held by the ball holding ring 9 is in a state of being released from the restriction by the ball restricting protrusion 10a of the operation sleeve 10, so that the ball 9b is moved along with the fitting of the connecting ring 13. It is pushed out in the centrifugal direction and moves to the stepped portion 10b side of the operation sleeve 10. Therefore, when the fitting of the connection ring 13 into the gap is not hindered, and then the operation of the operation sleeve 10 is stopped, the operation sleeve 10 returns to the original state position by the restoring action of the compression coil spring 11. With the return of the operation sleeve 10, the ball 9 b is pushed back in the centripetal direction by the restriction of the ball restricting protrusion 10 a, and a part of the ball 9 b is fitted in the circumferential groove 13 a of the connection ring 13. Thus, since the ball 9b is held in the ball holding hole 9a of the ball holding ring 9 and part of the ball 9b is fitted in the circumferential groove 13a of the connection ring 13, the ball 9b The connection state in which the connecting member 1 and the handpiece main body 2 are not removable is established by the occlusal action on both of the two. Since the ball 9b is in a state in which a part of the ball 9b is fitted in the circumferential groove 13a, the ball 9b is held in a state in which relative rolling is possible along the groove direction of the circumferential groove 13a. A contact buffer ring 15 is fitted to the base body 1C located at the front end of the connection ring 13 in the fitting direction, and the contact buffer ring 15 is elastically biased toward the front side of the connection member 1 by a compression coil spring 15a. When the connection ring 13 is fitted, the tip of the connection ring abuts to absorb the impact at the time of fitting.

  At the time of the connection, the fitting cylindrical portion 2c of the handpiece main body portion 2 is concentrically fitted to the base body 1C in the front side connection portion 1B of the connecting member 1, and each of the circumferences is formed by this fitting. The grooves 1b, 1d (1d ′), 1f are sealed by O-rings 1g interposed on both sides thereof. At the same time, the socket part 7 and the cylindrical contact member 8 attached to the socket part 7 are concentrically received in the cylindrical part 2b, and the input terminal 6aa of the LED 5 electric wire 6 in the handpiece body part 2 is cylindrical. The ring-shaped contact member 8 is elastically contacted with the ring contact 8a to establish an electrically conductive state. The handpiece body 2 is pivoted with respect to the connecting member 1 by concentric fitting of the fitting cylindrical part 2c with the base body 1C and the above-described occlusal relationship of the ball 9b and a state in which the ball 9b can roll relative to the circumferential groove 13a. The connection relationship is maintained so that it can rotate around the center and cannot be removed. In this connected state, since the input terminal 6aa and the ring contact 8a of the cylindrical contact member 8 are in an elastic sliding contact state, the above-described electrical conduction state is maintained, and the communication state of each drive medium passage and the like is also maintained. The When removing the handpiece main body 2, the ball 9 b is released from the above regulation if the handpiece main body 2 is pulled out with the operation sleeve 10 pushed out to the base side. Is simple and one-touch.

  In the dental handpiece device B shown in FIG. 4, the handpiece main body 20 in which the lamp unit 16 made of a halogen lamp is mounted on the connection member 1 common to the above and the light guide 17 is built in is connected to the connection member 1. On the other hand, it is connected so as to be detachable and rotatable about an axis. The proximal end portion 17a of the light guide 17 faces the light output portion of the lamp unit 16, the distal end portion 17b extends to the neck near the head portion 20A, and the light from the lamp unit 16 guided by the light guide 17 is Irradiation is made from the distal end portion 17b toward the vicinity of the distal end portion of the dental medical tool 3 (medical purpose site).

  A cylindrical portion 2b is formed concentrically on the base side of the handpiece main body portion 20. When the handpiece main body portion 20 is connected to the connecting member 1, the cylindrical portion 2b is the front side of the connecting member 1 as described above. An electrical socket portion 7 concentrically provided in the connection portion 1B and the lamp unit 16 mounted on the socket portion 7 can be received. The cylindrical contact portion 2b has the input contact portion 6a. Not provided. The cylindrical portion 2b is further extended with a fitting cylindrical portion 2c extending to the base side. The inner diameter of the fitting cylindrical portion 2c is the same as the outer diameter of the base 1C in the front side connecting portion 1B of the connecting member 1. They are substantially the same or slightly larger, and are configured to be fitted and connected to the base 1C in the same manner as described above. Since other configurations are the same as described above, the same reference numerals are given to common portions, and descriptions thereof are omitted.

  The dental handpiece device A shown in FIGS. 1 to 3 and the dental handpiece device B shown in FIG. 4 share the connection member 1 and have a neck LED installation type (the former) and a light guide type (the latter). Are compatible with each other. FIG. 5 shows the mounting relationship between the common connecting member 1 and the latter lamp unit 16 and the former cylindrical contact member 8. A cylindrical socket mounting portion 1Ca is concentrically provided at the front end of the base 1C in the connection member 1, and a male screw portion 1Cb is formed on the outer periphery of the socket mounting portion 1Ca. The socket main body 7a is fitted and fixed to the inner cylindrical portion of the socket mounting portion 1Ca, and the two output terminals 7b arranged opposite to each other in the socket main body 7a are soldered to the electric wire 7c housed in the base 1C. Etc. are electrically connected.

  The lamp unit 16 used in the light guide type handpiece device B (example in FIG. 4) includes a halogen lamp 16A and a cover nut 16B. A part of the pair of lamp terminals 16Ab is exposed on the surface of the insertion portion 16Aa of the halogen lamp 16A, and when the insertion portion 16Aa is concentrically inserted and attached to the inner cylinder portion of the socket portion main body 7a. The pair of lamp terminals 16Ab and the two output terminals 7b of the socket part 7 are joined to each other, and are brought into an electrically conductive state. Further, a cover nut 16B is fitted so as to cover the halogen lamp 16A, and a female screw portion 16Ba formed on the inner peripheral surface of the cover nut 16B is screwed into the male screw portion 1Cb, thereby preventing the halogen lamp 16A from coming off. Fixed. A compression coil spring 16Bb is housed in the front side portion of the cover nut 16B, and when the cover nut 16B is screwed, this compression is performed between the front side portion of the halogen lamp 16A and the front side inner surface of the cover nut 16B. The coil spring 16Bb is elastically mounted, whereby the halogen lamp 16A is stably mounted and fixed. The front end portion of the cover nut 16B is open. When the handpiece main body 20 shown in FIG. 4 is connected to the connecting member 1, the opening 16Bc faces the base end portion 17a of the light guide 17, and a halogen lamp The light from 16A enters the proximal end portion 17a of the light guide 17 through the opening 16Bc, is guided to the distal end portion 17b, and can irradiate the medical target site from the distal end portion 17b.

  Instead of the halogen lamp 16A of the lamp unit 16, an LED lamp 16C as shown in FIG. 6 can be used. This LED lamp 16C is constructed by incorporating four LED elements 16Ca as light emitters, and having an insertion portion 16Cb and a lamp terminal 16Cc for the socket portion 7 configured in the same manner as described above. Therefore, it can be used in the same manner as described above by attaching it to the socket portion 7 as described above and screwing the cover nut 16B shown in FIG. Is.

  The cylindrical contact member 8 used in the neck LED installation type handpiece device A (the example of FIGS. 1 to 3) has two rows of parallel ring contacts 8a and 8a on its peripheral surface as described above, A part of the pair of terminals 8b fixed to the ring contact 8a is exposed on the surface of the insertion portion 8c (see also FIGS. 7A and 7B). When the insertion part 8c is inserted concentrically into the inner cylinder part of the socket part body 7a, the exposed part of the pair of terminals 8b and the two output terminals 7b of the socket part 7 are joined to each other. Are in an electrically conductive state. Further, by covering the cylindrical contact member 8 with a cover nut-like cover member 8A, the internal thread portion 8Aa formed on the inner peripheral surface of the cover member 8A is screwed into the external thread portion 1Cb. The cylindrical contact member 8 is fixed to prevent it from coming off. That is, the cylindrical contact member 8 is formed with a flange 8d, the tip of the cover member 8A is opened, and the opening 8Ab is formed with an inward flange 8Ac. When the cover member 8A is screwed and attached, the site where the ring contact 8a is formed protrudes forward from the opening 8Ab of the cover member 8A, and the inward flange 8Ab of the cover member 8A Engaging with the flange portion 8d, the cylindrical contact member 8 is stably attached and secured. Although not shown, a ring contact can be provided on the tip surface of the cylindrical contact member 8. In this case, the ring contact is provided concentrically with respect to the axial center of the cylindrical contact member 8. Further, the input contact portion in the handpiece main body 2 is provided so as to abut on these concentric ring contacts from the axial direction in a connected state of the handpiece main body 2 and the connecting member 1.

  The cylindrical contact member 8 is made of a molded body made of an insulating material. During this molding, the ring contact 8a and the conductive member for the terminal 8b are embedded in the insulating material so that a part of each is exposed. (A) It is integrally formed into a shape as shown in (b). In this case, when the insertion portion 8c and the flange portion 8d are partly cut in a facing relationship, a part of the terminal 8b is exposed at the cut portion, and the cylindrical contact member 8 is mounted on the socket portion 7. The exposed portion is joined to the output terminal 7b.

  1 and 2 show a state in which the cylindrical contact member 8 is mounted and fixed to the socket portion 7 as described above, and the handpiece body portion 2 is connected to the connection member 1, and in this connection state, FIG. The base side input contact portion 6a of the electric wire 6 in the handpiece main body 2 is elastically contacted with the ring contact 8a in an electrically conductive state, and the LED 5 disposed on the neck portion in the vicinity of the head portion 2A leads to the medical purpose site. Can be irradiated.

  8 and 9 show another example of a cylindrical contact member. In general, an LED is required to be supplied with plus / minus DC power because of its characteristics. Therefore, the pair of terminals 8b of the cylindrical contact member 8 needs to be joined correspondingly to the two output terminals 7b of the socket portion 7 which are distinguished from each other. Therefore, in the example of FIG. 8, a cut portion 8 e is formed in a part of the flange portion 8 d, and a shape portion (not shown) that matches the cut portion 8 e is formed in the socket portion 7. When the cylindrical contact member 8 is mounted, the cut portion 8e and the shape portion are aligned and mounted. In the example shown in FIG. 9, a protrusion 8 f is provided on the periphery of the insertion portion 8 c, and a groove-shaped portion (not shown) that matches the protrusion 8 f is formed on the socket portion 7. When the cylindrical contact member 8 is mounted, the projection 8f and the groove-shaped portion are aligned and mounted.

  Moreover, in the example of FIG.8 and FIG.9, the parallel cut part 8ca facing the outer peripheral part of the cylindrical insertion part 8c is formed, and a part of terminal 8b is exposed to this cut part 8ca. The appropriate mounting direction of the cylindrical insertion portion 8c with respect to the socket portion 7 is uniquely determined by the geometric combination of the cut portion 8ca and the cut portion 8e of the flange portion 8d or the protrusion 8f of the insertion portion 8c. In this way, by configuring the cylindrical contact member 8 so that it can be attached to the socket portion 7 with a certain direction, correct plus / minus power supply suitable for the characteristics of the LED can be provided.

  In addition, although white LED is desirably used as said LED5, red, blue, and green LED can be arrange | positioned and it can be made to light-emit simultaneously and it can also be set as white light. Moreover, it is also possible to make these emit light individually. In the above embodiment, an example in which the driving body 4 is an air turbine has been described. However, a micro motor may be used. In this case, the drive medium is electricity. Furthermore, although the example in which the dental medical tool 3 is a cutting tool has been described, a scaler may be used, and in the case of a scaler, an ultrasonic oscillator or the like is used as a driver. Further, the connection between the connection member 1 and the tube C is not limited to the detachable connection structure as in the embodiment, but may be a connection structure that is integrated so as not to be detachable.

It is sectional drawing of one Embodiment of the dental handpiece apparatus of this invention. It is an enlarged view of the X section in FIG. It is an enlarged view of the Y section in FIG. It is the same figure as FIG. 1 which shows the example from which the usage type of the dental handpiece apparatus differs. It is a figure which shows the relationship between the connection member in the dental handpiece apparatus, and the lamp unit or cylindrical contact member with which it is mounted | worn. It is sectional drawing which shows notionally an example of the lamp unit with which the connection member is mounted | worn. (A) (b) is a figure which shows notionally an example of the cylindrical contact member with which the connection member is mounted | worn, (a) is sectional drawing, (b) is a top view. (A) (b) is a figure which shows the other example of a cylindrical contact member notionally, (a) is a top view, (b) is the right view. (A) and (b) are the figures which show notionally another example of a cylindrical contact member, (a) is a top view, (b) is the right view.

Explanation of symbols

1 Connection member 1a Air communication path (drive medium communication path)
1A Base side connection part 1B Front side connection part 2 Dental handpiece main body part 2a Air return path (drive medium path)
2A Head part 3 Dental examination tool 4 Air turbine (driving body)
4a Air pipeline (drive medium passage)
5 LED (light emitting diode)
6 Electric wire 6a Base side input contact portion 7 Electrical socket portion 8 Cylindrical contact member 8a Ring contact 16 Lamp unit A Dental handpiece device C Tube

Claims (3)

A base-side connecting portion to which a tube having a drive medium passage is connected and a dental handpiece main body having a drive medium passage for a dental medical tool attached to the distal end head portion are detachable and around an axis. A connecting member having a front-side connecting portion for pivotally connecting the driving medium passage and a driving medium communicating passage for communicating the driving medium passage in the tube and the driving medium passage in the handpiece main body. ,
The front-side connection portion is provided with an electrical socket portion for a lighting fixture, and is configured such that a cylindrical contact member having a lamp unit and an electrical ring contact can be attached to the socket portion in a removable manner. A connection member characterized by that. The connection member according to claim 1,
When the cylindrical contact member is attached to the socket portion and a handpiece body portion in which an electric wire for a light emitting diode provided in the vicinity of the head portion is connected is connected to the front connection portion, a cylindrical shape is obtained. A connecting member, wherein the ring contact of the contact member and the electric wire are electrically connected. A dental handpiece device comprising: the connecting member according to claim 1; and a dental handpiece main body connected to a front side connecting portion of the connecting member so as to be detachable and rotatable about an axis. There,
The handpiece main body includes a driving medium passage for a driving body for driving a dental medical tool attached to the distal end head portion, an electric wire for a light emitting diode provided in the vicinity of the head portion, A base-side input contact portion, and when the cylindrical contact member is attached to the socket portion of the connection member and the handpiece body portion is connected to the front-side connection portion, the drive medium communication path in the connection member and The drive medium passage in the handpiece body is connected in communication, and the ring contact of the cylindrical contact member and the input contact portion are electrically connected, thereby supplying the drive medium to the drive body and A dental handpiece device configured to supply power to a light emitting diode.

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