Dental low-speed handpiece
By incorporating a septum and cooling water channels into the dental low-speed handpiece, the problem of overheating in the handpiece handle was solved, achieving effective cooling of the actuator and improving handheld comfort, actuator performance, and lifespan.
Patent Information
- Application Number
- CN202520014051.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-04
- Publication Date
- 2026-01-06
- Estimated Expiration
- 2035-01-04
AI Technical Summary
The temperature of the dental low-speed handpiece handle rises, affecting the operator's grip comfort and the performance and lifespan of the actuator.
A spacer is installed inside the driver and handle of the dental low-speed handpiece. The spacer has a spiral channel, and the handle has water inlet and outlet channels. An external cooling water pipe is connected through an end cap, and the cooling water circulates through the spiral channel to cool the driver.
Effective heat dissipation from the driver prevents heat buildup on the handle, improving hand comfort and extending the driver's lifespan.
Smart Images
Figure CN223759900U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of medical device technology, specifically to a dental low-speed handpiece. Background Technology
[0002] Dental handpieces are important medical instruments in clinical dentistry, used to perform operations such as drilling, grinding, and polishing on patients' teeth. Depending on the rotation speed, dental handpieces can be divided into high-speed dental handpieces and low-speed dental handpieces. High-speed dental handpieces have a rotation speed of 300,000 to 500,000 rpm, while low-speed dental handpieces have a rotation speed of several thousand to 30,000 rpm.
[0003] The actuators used in dental low-speed handpieces are usually pneumatic motors or electric motors. Since the actuators are located inside the handpiece handle, the heat generated during operation cannot be dissipated in time, which can easily cause the handpiece handle temperature to rise, affecting the operator's grip on the handpiece as well as the performance and lifespan of the actuators. Therefore, it is necessary to make technical improvements to them. Utility Model Content
[0004] The purpose of this invention is to provide a low-speed dental handpiece to solve the problem in the prior art where the handpiece handle temperature rises, affecting the operator's grip on the handpiece and the performance and lifespan of the actuator.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a dental low-speed handpiece, including a handle, one end of which is connected to a head, a bur rotating inside the head, a driver for driving the bur to rotate inside the handle, and an end cap connected to the other end of the handle. A spacer is provided between the driver and the inner wall of the handle, a spiral channel is provided in the side wall of the spacer, and a water inlet channel and a water outlet channel are provided in the side wall of the handle. The inlet end of the water inlet channel is connected to the inlet end of the spiral channel, and the outlet end of the water outlet channel is connected to the outlet end of the spiral channel. The end cap has a through hole communicating with the water inlet channel and the water outlet channel.
[0006] As a preferred embodiment of this technical solution, a raised strip is provided on the side of the end cap facing the handle, an external thread is provided on the outer side of the raised strip, and a corresponding internal thread is provided on the inner side wall of the handle. The end cap is threadedly connected to the handle through the raised strip, and the raised strip abuts against the end of the spacer.
[0007] As a preferred embodiment of this technical solution, the end cap is provided with a sealing ring at the connection between the through hole and the water inlet channel and the water outlet channel.
[0008] As a preferred embodiment of this technical solution, a sealing ring II is provided at the connection between the inlet end of the water inlet channel and the spiral channel, and at the connection between the outlet end of the water outlet channel and the spiral channel.
[0009] As a preferred embodiment of this technical solution, the through hole of the end cap is configured as an internally threaded hole.
[0010] As a preferred embodiment of this technical solution, the handle and the head are threaded together.
[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model sets a spacer between the driver and the handle, and a spiral channel is set in the side wall of the spacer. A water inlet channel and a water outlet channel are set in the side wall of the handle. The inlet end of the water inlet channel and the spiral channel are connected, and the outlet end of the water outlet channel and the spiral channel are connected. The end cap is provided with a through hole that communicates with the water inlet channel and the water outlet channel. Cooling water can be introduced into the spiral channel from the outside to cool the driver and carry away the heat dissipated by the driver in a timely manner, so as to avoid the heat generated by the driver being transferred to the handle, which would affect the handholding of the mobile phone and the performance and service life of the driver. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of the structure of this utility model.
[0013] Figure 2 This is a partial cross-sectional view of the handle of this utility model.
[0014] In the diagram: 1. Handle; 2. Machine head; 3. Needle; 4. Driver; 5. Spacer; 6. Spiral channel; 7. Water inlet channel; 8. Water outlet channel; 9. End cap; 9.1. Through hole; 9.2. Raised strip; 10. Sealing ring one; 11. Sealing ring two. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] Please see Figure 1-2 This utility model discloses a low-speed dental handpiece, comprising a handle 1, one end of which is connected to a head 2, a bur 3 rotating inside the head 2, a driver 4 for driving the bur 3 to rotate inside the handle 1, an end cap 9 connected to the other end of the handle 1, a spacer 5 between the driver 4 and the inner wall of the handle 1, a spiral channel 6 inside the side wall of the spacer 5, a water inlet channel 7 and a water outlet channel 8 inside the side wall of the handle 1, the inlet end of the water inlet channel 7 and the spiral channel 6 being connected, and the outlet end of the water outlet channel 8 and the spiral channel 6 being connected, and a through hole 9.1 on the end cap 9 communicating with the water inlet channel 7 and the water outlet channel 8.
[0017] In a specific implementation of this utility model, the handle 1 is a hollow cylinder, and the handle 1 and the head 2 are threaded together for easy disassembly. The spacer 5 is a hollow cylinder with open ends. The end cap 9 has a raised strip 9.2 on the side facing the handle 1. The raised strip 9.2 is an annular raised strip with external threads on its outer side and corresponding internal threads on the inner wall of the handle 1. The end cap 9 is threaded to the inner wall of the handle 1 through the raised strip 9.2. That is, after the end cap 9 is screwed tight, the raised strip 9.2 presses against the end of the spacer 5, and the end cap 9 covers the end of the handle 1. The end cap 9 has a sealing ring 10 at the connection between the through hole 9.1 and the water inlet channel 7 and the water outlet channel 8. That is, the sealing ring 10 is provided at the end of the handle 1 near the through hole 9.1 to prevent water leakage in the channel. Sealing ring 2 11 is provided at the inlet end connection of water inlet channel 7 and spiral channel 6, and at the outlet end connection of water outlet channel 8 and spiral channel 6. That is, sealing ring 2 11 is provided at the connection between the spacer 5 and the inner wall of handle 1 near the connection between the two, which is also to prevent water leakage. The through hole 9.1 of end cover 9 is a threaded hole for easy connection with external water pipes.
[0018] When this utility model is in use, the end cap is connected to an external water pipe through a through hole. A wire hole for connecting to the driver can also be opened on the end cap for starting the driver. The driver drives the needle to rotate, and the external cooling water is circulated and cooled through the water pipe into the inlet channel, spiral channel and outlet channel in sequence to remove the heat generated by the driver.
[0019] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.
Claims
1. A dental low-speed handpiece, comprising a handle, a handpiece connected to one end of the handle, a bur rotating in the handpiece, a driver arranged in the handle to drive the bur to rotate, and an end cover connected to the other end of the handle, characterized in that: The spacer sleeve is arranged between the driver and the inner wall of the handle, a spiral channel is arranged in the side wall of the spacer sleeve, a water inlet channel and a water outlet channel are arranged in the side wall of the handle, the water inlet channel is communicated with the inlet end of the spiral channel, the water outlet channel is communicated with the outlet end of the spiral channel, and the end cover is provided with through holes communicated with the water inlet channel and the water outlet channel.
2. The dental low-speed handpiece of claim 1, wherein: A convex strip is arranged on the side of the end cover facing the handle, an outer thread is arranged on the outer side of the convex strip, a corresponding inner thread is arranged on the inner side wall of the handle, the end cover is threadedly connected with the handle through the convex strip, and the convex strip is pressed against the end of the spacer sleeve.
3. The dental low-speed handpiece of claim 1, wherein: The end cover is provided with a sealing ring I at the positions where the through holes are communicated with the water inlet channel and the water outlet channel.
4. The dental low-speed handpiece of claim 1, wherein: The inlet end of the water inlet channel and the outlet end of the water outlet channel are both provided with a sealing ring II.
5. The dental low-speed handpiece of claim 1, wherein: The through hole of the end cover is an inner threaded hole.
6. The dental low-speed handpiece of claim 1, wherein: The handle and the machine head are threadedly connected.