A dental handpiece with quick assembly and disassembly function

Abstract

This utility model discloses a dental handpiece with quick assembly and disassembly function, including a handle and a head. The head includes a head shell and a core assembly disposed on the head shell. The handle includes a handle shell detachably fitted to the head shell. The outer wall of the head shell away from the core assembly is provided with a first snap-fit ​​connection structure, and the inner wall of the handle shell near the head shell is provided with a second snap-fit ​​connection structure that limits the engagement with the first snap-fit ​​connection structure. This dental handpiece uses a snap-fit ​​connection to connect the handle shell and the head shell, which is more secure and faster than a threaded connection, facilitating quick assembly and disassembly. A positioning mechanism is provided to effectively lock the handle shell and head shell after assembly, ensuring accurate assembly each time and further improving stability. Therefore, this dental handpiece has a quick assembly and disassembly function, is convenient and quick to assemble and disassemble, has accurate positioning, and is easy to use.

Description

Technical Field

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

[0002] Dental handpieces used in clinical dentistry are precision miniature devices and are commonly used in dental medical equipment. Currently, most dental handpieces use a threaded connection between the handle housing and the head housing for assembly.

[0003] However, in actual use, when the dental handpiece's drive head and connecting shaft are in operation, they vibrate. Under such prolonged high-frequency vibration, the connection between the head housing and the handle housing can become loose, and in severe cases, the housing and handle can detach, causing medical accidents. In addition, because threaded connections cannot be precisely positioned and have a high degree of randomness, if the handle housing has special patterns or decorations, it is impossible to guarantee that the patterns or decorations will be in the same position after each assembly. Utility Model Content

[0004] The purpose of this invention is to provide a dental handpiece with quick assembly and disassembly functions, which 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 with quick assembly and disassembly function includes a handle and a head. The head includes a head housing and a core assembly disposed on the head housing. The handle includes a handle housing that is detachably fitted to the head housing. The outer wall of the head housing at the end away from the core assembly is provided with a first snap-fit ​​connection structure, and the inner wall of the handle housing at the end near the head housing is provided with a second snap-fit ​​connection structure that limits and engages with the first snap-fit ​​connection structure.

[0007] In some embodiments, the first snap-fit ​​connection structure includes multiple sets of first snap-fit ​​groups spaced apart along the outer periphery of the head housing, each set of first snap-fit ​​groups including multiple first protrusions spaced apart along the length direction of the head housing, the first protrusions extending circumferentially along the head housing.

[0008] In some embodiments, the second snap-fit ​​connection structure includes multiple sets of second snap-fit ​​groups spaced apart along the outer periphery of the handle housing. Each set of second snap-fit ​​groups includes multiple second protrusions spaced apart along the length direction of the handle housing. The second protrusions extend circumferentially along the handle housing. When the handle housing and the head housing are assembled in place, all the second snap-fit ​​groups correspond one-to-one with all the first snap-fit ​​groups, and the second protrusions abut against the first protrusions.

[0009] In some embodiments, the dental handpiece with quick assembly and disassembly function also includes a positioning mechanism. The positioning mechanism includes a positioning element disposed on the head housing and a positioning hole disposed on the handle housing and limited to the positioning element. When the handle housing and the head housing are assembled in place, the positioning element is precisely inserted into the positioning hole.

[0010] In some embodiments, the positioning element is disposed in the gap between two adjacent sets of the first snap-fit ​​groups, and the positioning hole is disposed in the gap between two adjacent sets of the second snap-fit ​​groups.

[0011] In some embodiments, the outer wall of the handle housing is patterned.

[0012] In some embodiments, the pattern includes a first side pattern and a second side pattern. When the positioning member is inserted into the positioning hole, the first side pattern and the second side pattern are symmetrically distributed on both sides of the handle housing with the central axis of the handle housing as the center.

[0013] In some implementations, the dental handpiece with quick-release function also includes a water supply pipe that is mounted on the head housing.

[0014] In some embodiments, the dental handpiece with quick-release function also includes a transmission mechanism and a bur. The bur is detachably mounted on 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 transmission shaft, and a second gear transmission assembly. The plug, linkage shaft, and first gear transmission assembly are mounted inside the handle housing, while the transmission 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 transmission 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.

[0015] The beneficial effects of this utility model are:

[0016] This utility model provides a dental handpiece with a novel structure. The handpiece uses a snap-fit ​​connection to connect the handle housing and the head housing, which is more secure and faster than the threaded connection, and facilitates quick assembly and disassembly.

[0017] It is equipped with a positioning mechanism that can effectively lock the handle housing and the head housing after assembly, ensuring that each assembly is accurate and error-free, and further improving stability.

[0018] Therefore, this dental handpiece has a quick disassembly and assembly function, is easy and quick to assemble and disassemble, and has precise positioning, making it convenient to use. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the dental handpiece with quick assembly and disassembly function of this utility model;

[0020] Figure 2 for Figure 1 The diagram shows the exploded structure of a dental handpiece.

[0021] Figure 3 for Figure 2 The diagram shows the structure of a dental handpiece from another angle;

[0022] Figure 4 This is a three-dimensional structural diagram of the handle shell of this utility model;

[0023] Figure 5 for Figure 1 The diagram shows a top view of the dental handpiece.

[0024] Figure 6 for Figure 5 The diagram shows a cross-sectional view of a dental handpiece along the AA direction.

[0025] Wherein: 1-Head; 2-Handle; 3-Positioning mechanism; 4-Water supply pipe; 5-Transmission mechanism; 11-Head housing; 12-Mechanical core assembly; 21-Handle outer shell; 22-Handle inner shell; 23-Connecting seat; 31-Positioning component; 32-Positioning hole; 51-Plug; 52-Linkage shaft; 53-First gear transmission assembly; 54-Transmission shaft; 55-Second gear transmission assembly; 111-First snap-fit ​​connection structure; 211-Second snap-fit ​​connection structure; 212-Pattern; 212a-First side pattern; 212b-Second side pattern; 1111-First snap-fit ​​group; 2111-Second snap-fit ​​group; 1111a-First protrusion; 2111a-Second protrusion. Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] refer to Figures 1 to 6 The illustration discloses a dental handpiece with quick assembly and disassembly function in one embodiment of the present invention.

[0028] Specifically, the dental handpiece with quick assembly and disassembly function includes a handle 2 and a head 1. The head 1 includes a head shell 11 and a core assembly 12 disposed on the head shell 11. The handle 2 includes a handle housing 21 that is detachably fitted to the head shell 11. The outer wall of the head shell 11 away from the core assembly 12 is provided with a first snap-fit ​​connection structure 111. The inner wall of the handle housing 21 near the head shell 11 is provided with a second snap-fit ​​connection structure 211 that is limited and fitted by the first snap-fit ​​connection structure 111.

[0029] Preferably, the first snap-fit ​​connection structure 111 includes multiple sets of first snap-fit ​​groups 1111 distributed at intervals along the outer periphery of the head housing 11. Each set of first snap-fit ​​groups 1111 includes multiple first protrusions 1111a distributed at intervals along the length direction of the head housing 11. The first protrusions 1111a extend circumferentially along the head housing 11.

[0030] Preferably, the second snap-fit ​​connection structure 211 includes multiple sets of second snap-fit ​​groups 2111 distributed at intervals along the outer periphery of the handle housing 21. Each set of second snap-fit ​​groups 2111 includes multiple second protrusions 2111a distributed at intervals along the length direction of the handle housing 21. The second protrusions 2111a extend circumferentially along the handle housing 21. When the handle housing 21 and the head housing 11 are assembled in place, all the second snap-fit ​​groups 2111 correspond one-to-one with all the first snap-fit ​​groups 1111, and the second protrusions 2111a abut against the first protrusions 1111a.

[0031] As a further preferred embodiment, the first buckle group 1111 in this embodiment consists of four groups, each of which includes three first protrusions 1111a, and the second buckle group 2111 consists of four groups, each of which includes three second protrusions 2111a.

[0032] Preferably, the dental handpiece with quick assembly and disassembly function also includes a positioning mechanism 3. The positioning mechanism 3 includes a positioning element 31 disposed on the head housing 11 and a positioning hole 32 disposed on the handle housing 21 and limited to the positioning element 31. When the handle housing 21 and the head housing 11 are assembled in place, the positioning element 31 is precisely inserted into the positioning hole 32.

[0033] As a further preferred embodiment, the positioning member 31 can be a limiting screw that can be detachably connected to the head housing 11 by means of threaded connection or other means, or it can be an elastic pin or an elastic limiting ball or other structures.

[0034] Preferably, the positioning element 31 is disposed in the gap between two adjacent sets of first buckle groups 1111, and the positioning hole 32 is disposed in the gap between two adjacent sets of second buckle groups 2111.

[0035] Preferably, the handle 2 also includes a handle inner shell 22 disposed within the handle outer shell 21.

[0036] Preferably, the handle 2 also includes a connector 23, which is located at the end of the handle housing 21 away from the head 1.

[0037] Preferably, the dental handpiece with quick assembly and disassembly function in this embodiment also includes a transmission mechanism 5 and a bur. The bur is detachably mounted on the mechanism assembly 12, and the mechanism assembly 12 is connected to the transmission mechanism 5.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] Preferably, the outer wall of the handle housing 21 is provided with a pattern 212.

[0042] As a further preferred embodiment, the pattern 212 includes a first side pattern 212a and a second side pattern 212b. When the positioning member 31 is engaged with the positioning hole 32, the first side pattern 212a and the second side pattern 212b are exactly aligned with the plane containing the central axis of the handle housing 21 (e.g., ...). Figure 5 The plane in the AA direction is symmetrically distributed on both sides of the handle housing 21.

[0043] Preferably, the dental handpiece with quick assembly / disassembly function in this embodiment also includes a water supply pipe 4, which is installed on the head housing 11. The water supply pipe 4 is connected to an external water source to provide cooling water.

[0044] The working principle of this dental handpiece with quick assembly and disassembly function is as follows:

[0045] When it is necessary to disassemble the handle housing 21, unscrew the positioning piece 31 and then rotate the handle housing 21 to a certain angle so that the second latch group 2111 of the handle housing 21 disengages from the first latch group 1111 of the head housing 11. At this time, the handle housing 21 can be detached relative to the head housing 11, which facilitates subsequent replacement of parts or maintenance work. After the replacement of parts or maintenance work is completed, reassemble the handle housing 21, the knob handle housing 21 is in the limit position, and then screw the positioning piece 31 back on.

[0046] This utility model provides a dental handpiece with a novel structure. The handpiece uses a snap-fit ​​connection to connect the handle housing 21 and the head housing 11, which is more secure and faster than the threaded connection, and facilitates quick assembly and disassembly.

[0047] The positioning mechanism 3 is provided, which can effectively lock the handle housing 21 and the head housing 11 after assembly, ensuring that each assembly is accurate and error-free, and further improving stability.

[0048] Therefore, the dental handpiece of this invention has a quick disassembly and assembly function, is easy and quick to disassemble and assemble, and has precise positioning and is convenient to use.

[0049] 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 with quick assembly / disassembly function, comprising a handle (2) and a head (1), the head (1) comprising a head housing (11) and a core assembly (12) disposed on the head housing (11), the handle (2) comprising a handle housing (21) detachably fitted to the head housing (11), characterized in that, The outer wall of the head housing (11) away from the movement assembly (12) is provided with a first snap-fit ​​connection structure (111), and the inner wall of the handle housing (21) near the head housing (11) is provided with a second snap-fit ​​connection structure (211) that is limited and cooperates with the first snap-fit ​​connection structure (111).

2. The dental handpiece with quick assembly / disassembly function according to claim 1, characterized in that, The first snap-fit ​​connection structure (111) includes multiple sets of first snap-fit ​​groups (1111) spaced apart along the outer periphery of the head shell (11). Each set of first snap-fit ​​groups (1111) includes multiple first protrusions (1111a) spaced apart along the length direction of the head shell (11). The first protrusions (1111a) extend circumferentially along the head shell (11).

3. The dental handpiece with quick assembly / disassembly function according to claim 2, characterized in that, The second snap-fit ​​connection structure (211) includes multiple sets of second snap-fit ​​groups (2111) spaced apart along the outer periphery of the handle housing (21). Each set of second snap-fit ​​groups (2111) includes multiple second protrusions (2111a) spaced apart along the length direction of the handle housing (21). The second protrusions (2111a) extend circumferentially along the handle housing (21). When the handle housing (21) and the head housing (11) are assembled in place, all the second snap-fit ​​groups (2111) correspond one-to-one with all the first snap-fit ​​groups (1111), and the second protrusions (2111a) abut against the first protrusions (1111a).

4. The dental handpiece with quick assembly / disassembly function according to claim 3, characterized in that, It also includes a positioning mechanism (3), which includes a positioning element (31) disposed on the head shell (11) and a positioning hole (32) disposed on the handle shell (21) and limited to the positioning element (31). When the handle shell (21) and the head shell (11) are assembled in place, the positioning element (31) is precisely inserted into the positioning hole (32).

5. The dental handpiece with quick assembly / disassembly function according to claim 4, characterized in that, The positioning element (31) is disposed in the gap between two adjacent sets of the first buckle group (1111), and the positioning hole (32) is disposed in the gap between two adjacent sets of the second buckle group (2111).

6. The dental handpiece with quick assembly / disassembly function according to claim 4, characterized in that, The outer wall of the handle housing (21) is provided with a pattern (212).

7. The dental handpiece according to claim 6, characterized in that, The pattern (212) includes a first side pattern (212a) and a second side pattern (212b). When the positioning member (31) is inserted into the positioning hole (32), the first side pattern (212a) and the second side pattern (212b) are symmetrically distributed on both sides of the handle housing (21) with the plane containing the central axis of the handle housing (21) as the center.

8. The dental handpiece according to any one of claims 1-7, characterized in that, It also includes a water supply pipe (4), which is installed on the machine head housing (11).

9. The dental handpiece with quick-release function according to any one of claims 1-7, 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 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).

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