Dental handpiece pinch mechanism and dental handpiece

Abstract

The utility model discloses a dental handpiece needle clamping mechanism and dental handpiece, including the shaft core pressing piece for driving the deformation of clamping component, the machine core limiting piece for limiting the axial displacement of clamping bar, the shaft core shaft sleeve of supporting and installing effect and the shaft core needle piece for clamping clamping bar, be equipped with the mounting hole of installing limiting piece on the shaft core shaft sleeve, be equipped with the cooperation structure of adapting with limiting piece on the shaft core pressing piece. Through setting up mounting hole and installing machine core limiting piece on the shaft core shaft sleeve, utilize machine core limiting piece and the close contact of clamping bar end face, limit the axial degree of freedom of clamping bar, solve the problem of axial migration of clamping bar due to the clearance, under the premise of the smaller structure and cost change, significantly improve the service life of needle clamping mechanism and even dental handpiece, ensure the position of clamping bar when clamping each time is consistent, avoid the interference of doctor operation because of clamping bar migration, help to improve the treatment success rate and operation safety.

Description

Technical Field

[0001] This utility model relates to the field of dental medical equipment technology, specifically a dental handpiece clamping mechanism and a dental handpiece. Background Technology

[0002] Dental handpieces are key equipment in dental treatment, restoration, and oral surgery, while root canal preparation machines are core tools for root canal treatment. Both require clamping burs or root canal files to perform their treatment functions. Furthermore, burs or root canal files need to be frequently disassembled and replaced during treatment. Therefore, the bur clamping device is a core component that ensures the normal operation of such dental medical equipment.

[0003] Current dental medical equipment primarily relies on axial friction to hold burs (or root canal files, hereinafter collectively referred to as "clamping rods"), and their structures are mainly divided into two categories. The first structure includes a core pressing element, a core sleeve, a core clamping element, and a clamping rod. The second structure adds a core pressing spring to the first structure. The clamping principle of both types of devices is the same: pressing down on the core pressing element causes elastic deformation of the core clamping element, increasing its inner diameter. At this time, the clamping rod is inserted into the core clamping element. Releasing the core pressing element causes the core clamping element to return to its original shape and clamp the clamping rod; respectively as follows: Figure 3 As shown in (a) and (b) in the figure.

[0004] However, existing needle clamping devices have a significant drawback: when the core pressing member is pressed down and inserted into the clamping bar, the end face of the clamping bar initially coincides with the end face of the core pressing member. However, after releasing the core pressing member, it springs back, causing a gap to form between the end face of the core pressing member and the end face of the clamping bar. Figure 4 As shown. This gap makes the clamping rod susceptible to axial movement due to forces in all directions during actual use. On the one hand, it accelerates the wear of the needle clamping device and shortens its service life; on the other hand, it interferes with the surgeon's surgical precision and may even affect the treatment effect. Utility Model Content

[0005] To address the problem of axial movement of the clamping rod caused by the gap between the clamping rod and the driving component in existing dental handpiece clamping devices, this invention provides a dental handpiece clamping mechanism and dental handpiece. Without significantly altering the original structure and reducing costs, it effectively restricts the axial freedom of the clamping rod, prevents axial movement, extends the service life of the clamping device, and ensures the stability of the surgeon's operation.

[0006] The technical solution to achieve the purpose of this utility model is: A dental handpiece clamping pin mechanism includes a shaft core pressing member for driving the deformation of the clamping component, a mechanism limiting member for limiting the axial displacement of the clamping rod, a shaft core bushing for supporting and mounting, and a shaft core clamping pin member for clamping the clamping rod; wherein the shaft core bushing is provided with a mounting hole for mounting the limiting member, and the shaft core pressing member is provided with a mating structure adapted to the limiting member.

[0007] The mounting hole extends radially through the shaft core and bushing, and the limiting member is a columnar structure that is either interference-fitted or clearance-fitted with the mounting hole.

[0008] The mating structure is a groove or hole structure opened on the shaft core pressing member, and the limiting member can slide relative to the mating structure.

[0009] The shaft core clamping pin is made of a flexible metal material, with one end abutting against the shaft core pressing pin and the other end having a clamping part for accommodating the clamping bar.

[0010] The inner diameter of the clamping part in its natural state is smaller than the outer diameter of the clamping rod. When the driving member moves, the clamping part can undergo elastic deformation to increase its inner diameter.

[0011] The needle clamping mechanism further includes an elastic reset member, which is disposed between the shaft core pressing member and the shaft core bushing, and is used to provide an elastic force to reset the shaft core pressing member.

[0012] The elastic reset element is a spring, which is sleeved on the outside of the shaft core sleeve and its two ends abut against the shaft core pressing element and the shaft core sleeve, respectively.

[0013] The spring is made of stainless steel.

[0014] The side wall of the shaft core clamp is provided with at least one axial opening groove to enhance its elastic deformation capability.

[0015] The contact area between the shaft core pressing member and the shaft core clamping member is a tapered structure, so that the movement of the shaft core pressing member can be converted into the radial expansion of the shaft core clamping member.

[0016] The surface of the limiting member is smoothed to reduce the coefficient of friction with the mating structure.

[0017] A dental handpiece includes the dental handpiece clamping mechanism described above.

[0018] The dental handpiece clamping mechanism and dental handpiece provided by this utility model have the following beneficial effects: 1. Solved the problem of axial movement: By setting mounting holes on the shaft core and bushing and installing the mechanism limiting component, the axial freedom of the clamping bar is directly restricted by the tight contact between the mechanism limiting component and the end face of the clamping bar, thus eliminating the axial movement of the clamping bar caused by the gap in the existing device. 2. Extend service life: Avoid axial movement of the clamping rod causing wear on the needle clamping mechanism, significantly improving the service life of the needle clamping mechanism and even the dental handpiece with minimal changes in structure and cost; 3. Ensure operational precision: Ensure that the position of the clamping rod is consistent each time it is clamped, so as to avoid interference with the doctor's operation due to the movement of the clamping rod, which helps to improve the success rate of treatment and the safety of surgery. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of Example 1; Figure 2 This is a schematic diagram of the structure of Example 2; Figure 3 Prior art illustrations mentioned in the background section Figure 1 ; Figure 4 Prior art illustrations mentioned in the background section Figure 2 ; In the diagram: 1. Shaft core pressing part; 11. Lower pressing groove; 2. Mechanism limiting pin; 3. Shaft core bushing; 4. Shaft core clamping pin part; 5. Shaft core pressing spring. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this is not intended to limit the present invention.

[0021] Example 1: A dental handpiece clamping mechanism without a core compression spring

[0022] like Figure 1 As shown, the dental handpiece clamping mechanism of this embodiment includes a shaft pressing component 1, a mechanism limiting pin 2, a shaft bushing 3, and a shaft clamping component 4.

[0023] The shaft core pressing part 1 is made of stainless steel and has rectangular pressing grooves (type 1 holes) symmetrically opened on both sides to match the outer diameter of the movement limiting pin 2; the lower end of the shaft core pressing part 1 has a tapered structure to abut against the upper end of the shaft core clamping pin part 4.

[0024] The shaft core and bushing 3 is a cylindrical hollow structure with radial mounting holes on its side wall. The axis of the mounting holes is perpendicular to and intersects the axis of the shaft core and bushing 3. The position of the mounting holes corresponds to the position of the lower pressing groove 11 of the shaft core pressing part 1, ensuring that the movement limiting pin 2 can be inserted into the lower pressing groove 11 after installation.

[0025] The movement limit pin 2 is a stainless steel cylindrical pin, which is installed in the mounting hole of the shaft core bushing 3. Its surface is polished to reduce the coefficient of friction with the pressing groove 11 of the shaft core pressing part 1.

[0026] The shaft core clamping pin 4 is made of spring steel and has a conical hollow structure. It is fitted inside the shaft core bushing 3, and its upper inner wall abuts against the lower conical structure of the shaft core pressing part 1. Two evenly distributed axial opening grooves are provided on the side wall of the shaft core clamping pin 4 to improve the elastic deformation capability of the shaft core clamping pin 4.

[0027] The working process of this embodiment is as follows: When the shaft core pressing part 1 is pressed down, the shaft core pressing part 1 slides down along the movement limiting pin 2. The tapered structure at its lower end pushes the upper end of the shaft core clamping pin 4 to expand outward. The shaft core clamping pin 4 undergoes elastic deformation, and the inner diameter of the clamping hole increases. Insert the clamping bar into the clamping hole from the lower end of the shaft core clamping pin 4 until the end face of the clamping bar is in close contact with the side wall of the movement limiting pin 2. When the shaft core pressing part 1 is released, the shaft core clamping pin part 4 returns to its original shape under its own elasticity, the inner diameter of the clamping hole shrinks and clamps the clamping bar; at the same time, the shaft core pressing part 1 rebounds upward under the reaction force of the shaft core clamping pin part 4 until the top of the lower pressing groove 11 contacts the movement limiting pin 2, thus completing the clamping.

[0028] Example 2: A novel dental handpiece clamping device with a core compression spring

[0029] The novel dental handpiece clamping device of this embodiment includes a core pressing component 1, a core limiting pin 2, a core bushing 3, a core clamping component 4, and a core pressing spring 5. The structure of the core pressing component 1, the core limiting pin 2, the core bushing 3, and the core clamping component 4 is the same as that of Embodiment 1.

[0030] The shaft core pressing spring 5 is a cylindrical compression spring made of spring steel. It is sleeved on the outside of the shaft core pressing part 1, with its upper end abutting against the stepped surface of the shaft core pressing part 1 and its lower end abutting against the upper end surface of the shaft core bushing 3. It is used to provide elastic force for the rebound of the shaft core pressing part 1.

[0031] The difference between the working process of this embodiment and that of embodiment 1 is that when the shaft core pressing part 1 is released, the shaft core pressing part 1 rebounds upward under the combined action of the reaction force of the shaft core clamping needle part 4 and the elastic force of the shaft core pressing spring 5. The rebound speed is faster and the stability is higher. The remaining steps are the same as those of embodiment 1.

Claims

1. A dental handpiece clamping mechanism, characterized in that, It includes a core pressing member for driving the deformation of the clamping component, a core limiting member for limiting the axial displacement of the clamping bar, a core bushing for supporting and installing, and a core clamping pin for clamping the clamping bar. The core bushing is provided with a mounting hole for installing the limiting member, and the core pressing member is provided with a mating structure adapted to the limiting member.

2. The dental handpiece clamping mechanism according to claim 1, characterized in that, The mounting hole extends radially through the shaft core and bushing, and the limiting member is a columnar structure that is either interference-fitted or clearance-fitted with the mounting hole.

3. The dental handpiece clamping mechanism according to claim 2, characterized in that, The needle clamping mechanism further includes an elastic reset member, which is disposed between the shaft core pressing member and the shaft core bushing, and is used to provide an elastic force to reset the shaft core pressing member.

4. A dental handpiece clamping mechanism according to claim 3, characterized in that, The elastic reset element is a spring, which is sleeved on the outside of the shaft core sleeve and its two ends abut against the shaft core pressing element and the shaft core sleeve, respectively.

5. A dental handpiece clamping mechanism according to claim 4, characterized in that, The spring is made of stainless steel.

6. The dental handpiece clamping mechanism according to claim 1, characterized in that, The mating structure is a groove or hole structure opened on the shaft core pressing member, and the limiting member can slide relative to the mating structure.

7. A dental handpiece clamping mechanism according to claim 1, characterized in that, The side wall of the shaft core clamp is provided with at least one axial opening groove to enhance its elastic deformation capability.

8. A dental handpiece clamping mechanism according to claim 1, characterized in that, The contact area between the shaft core pressing member and the shaft core clamping member is a tapered structure, so that the movement of the shaft core pressing member can be converted into the radial expansion of the shaft core clamping member.

9. A dental handpiece clamping mechanism according to claim 1, characterized in that, The surface of the limiting component has been smoothed.

10. A dental handpiece, characterized in that, Includes the dental handpiece clamping pin mechanism as described in any one of claims 1-9.

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