A dental handpiece

Abstract

The utility model discloses a dental handpiece, including the head and handle still include optical fiber light pipe and protection shell, and one end of optical fiber light pipe installs in the head and extends along the length direction of the head and penetrates handle, and protection shell movably installs in the head and is used for shielding part optical fiber light pipe or make part optical fiber light pipe expose, and handle and head detachable cooperation and with protection shell limit cooperation. The utility model provides a brand -new structure's dental handpiece, and this dental handpiece sets up the protection shell on the basis of traditional dental handpiece, and the protection shell can shield and protect optical fiber light pipe, and protection shell movably installs in the head and is convenient for realizing the disassembly to make optical fiber light pipe expose, and it is convenient to change or repair and so on operation, and in the operation process, only need to disassemble handle shell, need not to disassemble other parts, can effectively reduce operation procedure, save time and cost.

Description

Technical Field

[0001] This utility model relates to the field of dental handpiece technology, and in particular to a dental handpiece. Background Technology

[0002] Existing dental handpieces with lights typically use LED beads to directly illuminate the surgical site at the head of the handpiece. After each surgery, the handpiece must be sterilized with high-temperature and high-pressure steam. As a result, the LEDs on the handpiece are prone to failure (not lighting up) after repeated sterilization. Repairing or replacing the LEDs located at the head of the handpiece requires special tooling and materials, making repairs inconvenient, costly, and time-consuming.

[0003] As shown in patent documents such as CN 221980914 U, a standard quick-connect fiber optic press-type dental handpiece is disclosed. Its principle is that after the LED light emits light, the light is guided through the fiber optic cable to achieve the lighting effect when using the dental handpiece. It can effectively solve the problem of difficult maintenance of LED lights, but it also has a drawback: its fiber optic cable is fixedly installed inside the body, which is inconvenient to disassemble and maintain. Utility Model Content

[0004] The purpose of this invention is to provide a dental handpiece that can at least solve some of the problems in the prior art.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A dental handpiece includes a head and a handle, as well as an optical fiber guide tube and a protective shell. One end of the optical fiber guide tube is mounted on the head and extends along the length of the head and through the handle. The protective shell is movably mounted on the head and is used to partially block the optical fiber guide tube. The handle is detachably engaged with the head and is limited by the protective shell.

[0007] In some embodiments, the handle includes a handle housing that is detachably coupled to the head, the head including a head housing and a movement assembly disposed inside the head housing.

[0008] In some implementations, the handle housing is detachably connected to the head housing.

[0009] In some embodiments, the end of the head housing away from the movement assembly is provided with a first threaded connection structure, and the inner wall of the handle housing near the head housing is provided with a second threaded connection structure that mates with the first threaded connection structure.

[0010] In some embodiments, the head housing is provided with a first limiting groove that cooperates with the protective shell, the first threaded connection structure is provided with a first clearance groove that cooperates with the optical fiber guide tube, and the second threaded connection structure is provided with a second clearance groove that cooperates with the optical fiber guide tube.

[0011] In some embodiments, a guide strip is provided on the outer periphery of the protective shell, and a guide groove that cooperates with the guide strip is provided on the side wall of the first limiting groove.

[0012] In some embodiments, the handle also includes an inner handle housing disposed within the outer handle housing, and the outer wall of the inner handle housing has a second limiting groove that cooperates with the optical fiber guide tube.

[0013] In some embodiments, the handle also includes a connector, which is located at the end of the handle housing away from the head, and the connector has a limiting hole that mates with the optical fiber guide tube.

[0014] In some embodiments, the dental handpiece further includes a transmission mechanism and a bur. The bur is detachably mounted to the mechanism assembly, which is connected to the transmission mechanism. The transmission mechanism includes a plug, a linkage shaft, a first gear transmission assembly, a drive shaft, and a second gear transmission assembly. The plug, linkage shaft, and first gear transmission assembly are mounted inside the handle housing, while the drive shaft and second gear transmission assembly are mounted inside the head housing. One end of the linkage shaft is fixedly connected to the plug, and the other end is connected to the first gear transmission assembly. One end of the drive shaft is connected to the first gear transmission assembly, and the other end is connected to the second gear transmission assembly. The second gear transmission assembly is connected to the mechanism assembly. Thus, the plug serves as the drive shaft for an external motor. When the motor starts, the plug drives the linkage shaft to rotate. When the linkage shaft rotates, the first gear transmission assembly drives the drive shaft to rotate. When the drive shaft rotates around its own axis, it drives the second gear transmission assembly. Through the action of the second gear transmission assembly, the mechanism assembly can rotate around its own axis, thereby driving the bur to rotate around its own axis for treatment operations.

[0015] In some embodiments, the front end of the protective shell has an opening that fits into the optical fiber guide tube.

[0016] The beneficial effects of this utility model are:

[0017] This invention provides a novel dental handpiece structure. Based on the traditional dental handpiece, this handpiece incorporates a protective shell that shields and protects the fiber optic light guide tube. The protective shell is movably mounted on the handpiece head for easy disassembly, exposing the fiber optic light guide tube for easy replacement or repair. During operation, only the handle shell needs to be disassembled, without disassembling other parts, effectively reducing operational steps and saving time and costs. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the dental handpiece of this utility model;

[0019] Figure 2 for Figure 1 The diagram shows the exploded structure of a dental handpiece.

[0020] Figure 3 for Figure 1 The diagram shows the three-dimensional structure of a dental handpiece after omitting some of its structural components.

[0021] Figure 4 for Figure 1 The diagram shown is a top-view structural diagram of a dental handpiece;

[0022] Figure 5 for Figure 4 The diagram shows a cross-sectional view of a dental handpiece along the AA direction.

[0023] Figure 6 This is a three-dimensional structural diagram of the handle shell of this utility model.

[0024] Wherein: 1-Headpiece; 2-Handle; 3-Fiber optic guide tube; 4-Protective shell; 5-Transmission mechanism; 11-Headpiece shell; 12-Mechanical core assembly; 21-Handle outer shell; 22-Handle inner shell; 23-Connecting seat; 41-Guide strip; 42-Opening; 51-Plug; 52-Linkage shaft; 53-First gear transmission assembly; 54-Transmission shaft; 55-Second gear transmission assembly; 111-First threaded connection structure; 112-First limiting groove; 113-First clearance groove; 114-Guide slide groove; 121-Pin sleeve; 211-Second threaded connection structure; 212-Second clearance groove; 213-Pattern; 221-Second limiting groove; 231-Limiting hole. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] refer to Figures 1 to 6 The present invention illustratively discloses a dental handpiece of one embodiment.

[0027] Specifically, the dental handpiece includes a head 1 and a handle 2, as well as an optical fiber guide tube 3 and a protective shell 4. One end of the optical fiber guide tube 3 is installed on the head 1 and extends along the length of the head 1 and passes through the handle 2. The protective shell 4 is movably installed on the head 1 and is used to partially block the optical fiber guide tube 3. The handle 2 is detachably engaged with the head 1 and is limited by the protective shell 4.

[0028] Preferably, the front end of the protective shell 4 is provided with an opening 42 that fits into the optical fiber guide tube 3.

[0029] Preferably, the handle 2 includes a handle housing 21 that is detachably coupled to the head 1, and the head 1 includes a head housing 11 and a movement assembly 12 disposed inside the head housing 11.

[0030] Preferably, the handle housing 21 is detachably connected to the head housing 11.

[0031] As a further preferred embodiment, the end of the head housing 11 away from the movement assembly 12 is provided with a first threaded connection structure 111, and the inner wall of the handle housing 21 near the end of the head housing 1 is provided with a second threaded connection structure 211 that cooperates with the first threaded connection structure 111.

[0032] Preferably, the head housing 11 is provided with a first limiting groove 112 that cooperates with the protective housing 4, the first threaded connection structure 111 is provided with a first clearance groove 113 that cooperates with the optical fiber guide tube 3, and the second threaded connection structure 211 is provided with a second clearance groove 212 that cooperates with the optical fiber guide tube 3.

[0033] Preferably, the outer periphery of the protective shell 4 is provided with a guide strip 41, and the side wall of the first limiting groove 112 is provided with a guide groove 114 that cooperates with the guide strip 41 for limiting.

[0034] Preferably, the handle 2 also includes a handle inner shell 22 disposed inside the handle outer shell 21, and the outer wall of the handle inner shell 22 is provided with a second limiting groove 221 that cooperates with the optical fiber guide tube 3.

[0035] Preferably, the handle 2 also includes a connecting seat 23, which is located at the end of the handle housing 21 away from the head 1. The connecting seat 23 has a limiting hole 231 that cooperates with the optical fiber guide tube 3.

[0036] Preferably, the dental handpiece also includes a transmission mechanism 5 and a bur, the bur being detachably mounted on the mechanism assembly 12, the mechanism assembly 12 being connected to the transmission mechanism 5 in a transmission connection.

[0037] The mechanism assembly 12 is existing technology and may specifically include a press-type mechanism and a needle sleeve 121. The press-type mechanism is rotatably installed in the head cavity of the head of the machine head 1 and is fixedly sleeved on the outside of the needle sleeve 121. The needle sleeve 121 is used to install the bur. When the press-type mechanism rotates, it can drive the bur to rotate, thereby performing surgical operations. The specific installation method of the press-type mechanism in the head of the machine head 1 is not limited. In this embodiment, preferably, the upper and lower ends of the press-type mechanism are rotatably installed in the head cavity of the head of the machine head 1 through bearings.

[0038] Preferably, the transmission mechanism 5 includes a plug 51, a linkage shaft 52, a first gear transmission assembly 53, a transmission shaft 54, and a second gear transmission assembly 55. The plug 51, linkage shaft 52, and first gear transmission assembly 53 are installed inside the handle housing 21, and the transmission shaft 54 ​​and second gear transmission assembly 55 are installed inside the head housing 11. One end of the linkage shaft 52 is fixedly connected to the plug 51 by fasteners such as screws or rivets, and the other end is connected to the first gear transmission assembly 53. One end of the transmission shaft 54 ​​is connected to the first gear transmission assembly 53, and the other end is connected to the second gear transmission assembly 55. The second gear transmission assembly 55 is connected to the mechanism assembly 12. Therefore, the connector 23 is used to quickly connect the output end of the electric motor, and the plug 51 can be connected to the output shaft of the electric motor. When the motor starts, the plug 51 drives the linkage shaft 52 to rotate. When the linkage shaft 52 rotates, the first gear transmission assembly 53 drives the transmission shaft 54 ​​to rotate. When the transmission shaft 54 ​​rotates around its own axis, it drives the second gear transmission assembly 55 to run. Through the action of the second gear transmission assembly 55, the movement assembly 12 can be driven to rotate around its own axis, thereby driving the needle to rotate around its own axis for treatment operation.

[0039] As a further preferred embodiment, both the first gear transmission assembly 53 and the second gear transmission assembly 55 include at least two meshing gears.

[0040] Preferably, the outer wall of the handle housing 21 is provided with a pattern 213.

[0041] The working principle of this dental handpiece is as follows:

[0042] When the fiber optic tube 3 needs repair or replacement, the handle housing 21 and the connector 23 are removed together by turning the handle housing 21. At this time, the handle housing 21 can no longer block the protective shell 4, and the protective shell 4 can slide away from the end of the head 1. The sliding is guided by the cooperation of the guide strip 41 and the guide groove 114. Since the fiber optic tube 3 is made of soft material, it will slide out of the opening 42 during the sliding process of the protective shell 4. After the protective shell 4 slides to the end, it can be directly removed, and the fiber optic tube 3 is exposed. This facilitates maintenance and replacement. After replacement, the fiber optic tube 3 is assembled into place, and then the protective shell 4 is reinstalled so that the front end of the fiber optic tube 3 is inserted into the opening 42 of the protective shell 4. Then, the handle housing 21 is screwed back on. After assembly, the handle housing 21 can cover the fiber optic tube 3 located on the outer wall of the inner shell of the handle, while the protective shell 4 can cover the fiber optic tube 3 located on the outer wall of the head housing 11. Only the front end of the entire fiber optic tube 3 is exposed from the opening 42, which serves as an illumination function, combining aesthetics and practicality.

[0043] This invention provides a novel dental handpiece structure. Based on a traditional dental handpiece, this handpiece incorporates a protective shell 4. This protective shell 4 shields and protects the fiber optic tube 3. The protective shell 4 is movably mounted on the handpiece head 1 for easy disassembly, exposing the fiber optic tube 3 for easy replacement or repair. During operation, only the handle housing 21 needs to be disassembled, without disassembling other parts, effectively reducing operational steps and saving time and costs.

[0044] The above description only discloses some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and these all fall within the protection scope of this utility model.

Claims

1. A dental handpiece, comprising a head (1) and a handle (2), characterized in that, It also includes an optical fiber guide tube (3) and a protective shell (4). One end of the optical fiber guide tube (3) is installed on the head (1) and extends along the length of the head (1) and passes through the handle (2). The protective shell (4) is movably installed on the head (1) and is used to partially block the optical fiber guide tube (3). The handle (2) is detachably engaged with the head (1) and is limited by the protective shell (4).

2. The dental handpiece according to claim 1, characterized in that, The handle (2) includes a handle housing (21) that is detachably coupled to the head (1), and the head (1) includes a head housing (11) and a movement assembly (12) disposed inside the head housing (11).

3. The dental handpiece according to claim 2, characterized in that, The handle housing (21) is detachably connected to the head housing (11).

4. The dental handpiece according to claim 3, characterized in that, The head housing (11) is provided with a first threaded connection structure (111) at the end away from the movement assembly (12), and the handle housing (21) is provided with a second threaded connection structure (211) on the inner wall of the end near the head (1) that cooperates with the first threaded connection structure (111).

5. The dental handpiece according to claim 4, characterized in that, The head housing (11) is provided with a first limiting groove (112) that cooperates with the protective shell (4), the first threaded connection structure (111) is provided with a first clearance groove (113) that cooperates with the optical fiber guide tube (3), and the second threaded connection structure (211) is provided with a second clearance groove (212) that cooperates with the optical fiber guide tube (3).

6. The dental handpiece according to claim 5, characterized in that, The outer periphery of the protective shell (4) is provided with a guide strip (41), and the side groove wall of the first limiting groove (112) is provided with a guide groove (114) that cooperates with the guide strip (41) for limiting.

7. The dental handpiece according to claim 5, characterized in that, The handle (2) also includes a handle inner shell (22) disposed inside the handle outer shell (21), and the outer wall of the handle inner shell (22) is provided with a second limiting groove (221) that cooperates with the optical fiber guide tube (3).

8. The dental handpiece according to claim 7, characterized in that, The handle (2) also includes a connecting seat (23), which is located at the end of the handle housing (21) away from the head (1). The connecting seat (23) has a limiting hole (231) that cooperates with the optical fiber guide tube (3).

9. The dental handpiece according to any one of claims 2-8, characterized in that, It also includes a transmission mechanism (5) and a needle, the needle being detachably mounted on the movement assembly (12), the movement assembly (12) being drivenly connected to the transmission mechanism (5), the transmission mechanism (5) including a plug (51), a linkage shaft (52), a first gear transmission assembly (53), a transmission shaft (54), and a second gear transmission assembly (55), the plug (51), the linkage shaft (52), and the first gear transmission assembly (53) being mounted inside the handle housing (21), the transmission shaft (54) and the second gear transmission assembly (55) being mounted inside the head housing (11), one end of the linkage shaft (52) being fixedly connected to the plug (51), and the other end being drivenly connected to the first gear transmission assembly (53), one end of the transmission shaft (54) being drivenly connected to the first gear transmission assembly (53), and the other end being drivenly connected to the second gear transmission assembly (55), the second gear transmission assembly (55) being drivenly connected to the movement assembly (12).

10. The dental handpiece according to any one of claims 1-8, characterized in that, The protective shell (4) has an opening (42) at the front end that is matched with the optical fiber guide tube (3).

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