A dental ultrasonic osteotome working tip force limiting wrench

Abstract

This invention relates to the field of dental medical devices and discloses a dental ultrasonic bone scalpel working tip limiting wrench, comprising a wrench locking block, a wrench tightening block, a rubber pad, a tightening screw, and a rotating assembly. When it is necessary to install or remove the working tip, the operator aligns the wrench slot with and fits it onto the wrench part of the bone scalpel working tip. At this time, the clamping slot on the rubber pad is inserted into the working tip. Due to the elasticity of the rubber pad, its clamping slot expands elastically during insertion and generates a radial contraction clamping force, thereby stably and elastically clamping the working tip inside the wrench and preventing the working tip from falling off freely. When the working tip is completely removed from the handle, due to the continuous action of the elastic clamping force of the rubber pad, the working tip is held inside the wrench and will not accidentally slip to the ground or hard surface due to gravity, thereby effectively avoiding deformation or damage to the working tip caused by falling.

Description

Technical Field

[0001] This invention relates to the field of dental medical device technology, and in particular to a dental ultrasonic bone scalpel working tip limiter wrench. Background Technology

[0002] A dental ultrasonic bone scalpel is a medical device that uses high-frequency ultrasonic vibration to precisely cut hard dental tissues. Used in dentistry and plastic surgery, it is suitable for delicate procedures such as wisdom tooth extraction and dental implantation. It mainly consists of a main unit, a handle, a foot switch, and other accessories, including a working tip and a torque wrench. The working tip is threaded onto the handle. The rear of the working tip is cylindrical, with four (or six) opposing flat surfaces designed for tightening and loosening using the torque wrench. In actual use, the working tip needs frequent loading, unloading, and replacement to adapt to different surgical needs. After use, the working tip should be removed from the handle and sterilized at high temperature. To effectively load and unload the working tip and protect the user from scratches during the process, a torque wrench is used to control the tightening force.

[0003] A torque limiter wrench is usually a round structure with a small hole at the bottom. The working tip is inserted into the hole, and the wrench is turned to tighten the working tip. Turning the wrench in the opposite direction removes the working tip. It usually consists of a cover plate, a wrench cover, a wrench seat, and a ratchet body. A retaining ring or a shaft elastic retainer is needed to fix the ratchet body between the cover plate and the wrench cover. Special tools, such as retaining ring pliers, are required for installation, making installation inconvenient. In addition, the overall structure of the wrench is complex and the manufacturing cost is high.

[0004] Existing torque limiters only consider the case of tightening the working tip. When the working tip is removed from the handle, because the torque limiter does not have a corresponding clamping device, the working tip may slip out of the small hole at the bottom of the wrench and fall to the ground or a hard surface, which can easily cause the working tip to be deformed or damaged. Summary of the Invention

[0005] The purpose of this invention is to provide a dental ultrasonic bone scalpel working tip force limiting wrench, which solves the problems of existing force limiting wrenches having complex structures, inconvenient assembly, high processing costs, and lack of effective clamping when disassembling the working tip, which easily leads to the working tip slipping and being damaged.

[0006] To achieve the above objectives, the present invention provides a dental ultrasonic bone scalpel working tip limiting wrench, comprising a wrench locking block, a wrench tightening block, a rubber pad, a tightening screw, and a rotating assembly. The rubber pad is disposed between the wrench locking block and the wrench tightening block, and is located at the upper end of the wrench locking block. The tightening screw passes through the wrench locking block and the rubber pad and is threadedly connected to the wrench tightening block, pressing and fixing the rubber pad to the upper end face of the wrench locking block. The wrench locking block has a wrench opening for engaging with the working tip wrench portion. The rubber pad has a clamping opening for elastically holding the working tip. The clamping opening and the wrench opening are coaxially arranged. The rotating assembly is rotatably sleeved on the outer periphery of the wrench locking block and the wrench tightening block, for receiving external rotation operations and transmitting torque to the wrench locking block.

[0007] The rotating assembly includes a wrench housing, a ratchet, and a cover plate. The ratchet is sleeved on the outer periphery of the wrench locking block. The wrench housing is rotatably sleeved on the outer periphery of the ratchet. The cover plate is sleeved on the wrench tightening block, and the ratchet is located between the cover plate and the wrench locking block.

[0008] The ratchet has multiple ratchet pawls, and the inner wall of the wrench housing is provided with an inner ratchet hole that mates with the ratchet pawls. The ratchet pawls engage with the inner ratchet hole to transmit torque.

[0009] The clamping opening consists of a square hole at the center and multiple strip-shaped notches located outward from the center. The strip-shaped notches extend radially along the square hole and are connected to the square hole.

[0010] The number of strip-shaped notches is four, which are evenly distributed around the square hole to form a cross-shaped structure.

[0011] The ratchet is made of plastic.

[0012] The wrench locking block and the wrench tightening block are provided with mutually cooperating flat parts for axial limiting.

[0013] The wrench tightening block has a locating pin at its bottom, and the wrench locking block has a locating hole that mates with the locating pin.

[0014] This invention provides a force-limiting wrench for the working tip of a dental ultrasonic bone scalpel. When installing or removing the working tip, the operator aligns the wrench opening with and fits it onto the wrench portion of the bone scalpel's working tip. At this time, the clamping opening on the rubber pad is inserted into the working tip. Due to the elasticity of the rubber pad, the clamping opening elastically expands and generates a radially contracting clamping force during insertion, thereby stably and elastically clamping the working tip inside the wrench and preventing it from falling off freely. Subsequently, the operator holds the rotating component and performs a rotation operation, causing the rotating component to... External torque is transmitted to the wrench locking block. Since the wrench locking block and the wrench tightening block are fixedly connected by the tightening screw, the wrench locking block rotates synchronously, thereby driving the clamped working tip to rotate synchronously, realizing the tightening or loosening operation of the working tip. When the working tip is completely removed from the handle, due to the continuous action of the elastic clamping force of the rubber pad, the working tip is kept in the wrench and will not accidentally slip to the ground or hard table due to gravity, thus effectively avoiding deformation or damage to the working tip caused by falling.

[0015] Compared with the prior art, the present invention uses the rubber pad with the clamping position in the center as the component and method for clamping the working tip. Compared with the clamping method of spring clips and magnetic metal, the structure is simpler and the cost is lower. It is still safe and effective after repeated high-temperature sterilization.

[0016] Because the rubber pad can stably hold the working tip inside the torque limiter, it can effectively prevent the user's hand from being scratched by the working tip during the installation and removal process; and it can also hold the working tip to prevent it from being lost while removing it. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0018] Figure 1 This is an exploded view of the working tip limiter wrench of the dental ultrasonic bone scalpel of the present invention.

[0019] Figure 2 This is a top view of the dental ultrasonic bone scalpel working tip limiting wrench of the present invention.

[0020] Figure 3 This is a schematic diagram of the ratchet mounting structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the internal ratchet hole of the present invention.

[0022] In the diagram: 1-Wrench locking block, 2-Wrench tightening block, 3-Rubber pad, 4-Tightening screw, 5-Rotating assembly, 6-Wrench housing, 7-Ratchet, 8-Cover plate, 9-Ratchet pawl, 10-Inner ratchet hole, 11-Positioning pin, 12-Positioning hole, 13-Wrench position opening, 14-Clamping position opening. Detailed Implementation

[0023] The embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0024] This invention provides a force-limiting wrench for the working tip of a dental ultrasonic bone scalpel, comprising a wrench locking block 1, a wrench tightening block 2, a rubber pad 3, a tightening screw 4, and a rotating assembly 5. The rotating assembly 5 includes a wrench housing 6, a ratchet 7, and a cover plate 8. By setting a rubber pad 3 with a clamping opening 14 and pressing it firmly between the wrench locking block 1 and the wrench tightening block 2, the rubber pad 3 can elastically clamp the working tip. This solves the problems of existing force-limiting wrenches having complex structures, inconvenient assembly, high processing costs, and the working tip being prone to slippage and damage during disassembly due to the lack of a clamping device. It is understood that the aforementioned solution can be used in the loading and unloading scenarios of dental ultrasonic bone scalpel working tips.

[0025] In this specific embodiment, the rubber pad 3 is disposed between the wrench locking block 1 and the wrench tightening block 2. The rubber pad 3 is located at the upper end of the wrench locking block 1. The tightening screw 4 passes through the wrench locking block 1 and the rubber pad 3 and is threadedly connected to the wrench tightening block 2, pressing and fixing the rubber pad 3 to the upper end face of the wrench locking block 1. The wrench locking block 1 has a wrench opening 13 for engaging with the working tip wrench part. The rubber pad 3 has a clamping opening 14 for elastically clamping the working tip. The clamping opening 14 and the wrench opening 13 are coaxially arranged. The rotating component 5 is rotatably sleeved on the outer periphery of the wrench locking block 1 and the wrench tightening block 2, for receiving external rotation operations and transmitting torque to the wrench locking block 1. The wrench opening 13 has the same shape as the working tip part of the dental ultrasonic bone scalpel, which is a square hole. When it is necessary to install or remove the working tip, the operator aligns the wrench opening 13 and sleeves it. Hold the wrench part of the working tip of the bone scalpel machine, and then let the clamping port 14 on the rubber pad 3 fit onto the working tip. Because the rubber pad 3 is elastic, its clamping port 14 expands elastically and generates a radial contraction clamping force during the fitting process, thereby stably and elastically clamping the working tip inside the wrench and preventing the working tip from falling off freely. Subsequently, the operator holds the rotating component 5 and rotates it. The rotating component 5 transmits the external torque to the wrench locking block 1. Since the wrench locking block 1 and the wrench tightening block 2 are fixedly connected by the tightening screw 4, the wrench locking block 1 rotates synchronously, thereby driving the clamped working tip to rotate synchronously, realizing the tightening or loosening operation of the working tip. When the working tip is completely removed from the handle, due to the continuous action of the elastic clamping force of the rubber pad 3, the working tip is kept inside the wrench and will not accidentally slip to the ground or hard table due to gravity, thereby effectively avoiding deformation or damage to the working tip caused by falling.

[0026] The ratchet 7 is sleeved on the outer periphery of the wrench locking block 1; the wrench housing 6 is rotatably sleeved on the outer periphery of the ratchet 7; the cover plate 8 is sleeved on the wrench tightening block 2, and the ratchet 7 is located between the cover plate 8 and the wrench locking block 1.

[0027] Secondly, the ratchet 7 has multiple ratchet pawls 9, and the inner wall of the wrench housing 6 is provided with an inner ratchet hole 10 that cooperates with the ratchet pawls 9. The ratchet pawls 9 engage with the inner ratchet hole 10 to transmit torque.

[0028] The rubber pad 3 is disposed at the upper end of the wrench locking block 1. The inner ring hole of the ratchet 7 is fitted onto the outer ring of the boss of the wrench locking block 1. The wrench locking block 1 and the ratchet 7 are limited and fixed by a flat part. The wrench tightening block 2 is mounted from the top inside the wrench housing 6, and the wrench locking block 1, the rubber pad 3, the ratchet 7, and the cover plate 8 are fixed together by the tightening screw 4. The bottom of the wrench tightening block 2 is provided with a positioning pin 11, which is positioned with the positioning hole 12 of the wrench locking block 1, and at the same time increases the rotational tangential force of the wrench locking block 1, the wrench tightening block 2, and the ratchet 7.

[0029] The wrench housing 6 is annular in shape, and its bottom inner wall is designed with an inner ratchet hole 10. The inner ratchet hole 10 is composed of multiple claw holes that match the shape of the ratchet pawl 9. The outer wall of the wrench housing 6 is provided with axially extending grooves to facilitate hand grip and force application rotation. The ratchet 7 is provided with multiple ratchet pawls 9. The ratchet 7 is made of metal or hard plastic material. However, considering that the force-limiting wrench needs to be sterilized at high temperature, in order to avoid rusting, the ratchet 7 of this invention is made of plastic material. The cover plate 8 is thin annular in shape, and the inner hole of the cover plate 8 fits into the lower end of the wrench tightening block 2.

[0030] Meanwhile, the clamping opening 14 consists of a square hole located in the center and multiple strip-shaped notches located outward from the center. The strip-shaped notches all extend along the radial direction of the square hole and are connected to the square hole.

[0031] In addition, there are four strip-shaped notches, which are evenly distributed around the square hole to form a cross-shaped structure.

[0032] The rubber pad 3 is a thin, circular sheet-shaped pad. A through hole, namely the clamping position 14, is opened at the center of the rubber pad 3. The clamping position 14 is coaxially opposite to the wrench position 13 of the wrench locking block 1. Since the rubber pad 3 clamps the working tip through the friction between the clamping position 14 and the working tip, and the friction between the rubber pad 3 and the working tip is closely related to its material, the rubber pad 3 can be made of rubber, silicone, or other materials. In the embodiment of the present invention, the rubber pad 3 is made of rubber.

[0033] The clamping opening 14 of the rubber pad 3 is shaped to match the working tip, thus stably fixing the working tip within the clamping opening 14 of the rubber pad 3. Considering that different models or types of working tips may have different sizes, the clamping opening 14 of this invention consists of a square hole in the center and multiple strip-shaped notches arranged outward from the center. The strip-shaped notches extend radially along the square hole and are connected to it. This structure of the clamping opening 14 has a certain degree of flexibility, thus it is suitable for more specifications of working tips. The strip-shaped notches are all straight and evenly distributed radially outward from the square hole. In order to facilitate the restoration of the clamping opening 14, in this embodiment of the invention, four strip-shaped notches are provided on the outer side of the square hole, and these four strip-shaped notches form a cross shape.

[0034] When using the dental ultrasonic bone scalpel working tip limiting wrench of the present invention, the wrench position 13 of the wrench locking block 1 is fitted onto the wrench part of the bone scalpel working tip, and the clamping position 14 at the center of the rubber pad 3 is fitted onto the working tip of the bone scalpel; rotating the wrench housing 6, the ratchet 7 transmits the torque of the wrench housing 6 to the wrench locking block 1, and the wrench locking block 1 rotates synchronously, realizing the installation and removal of the working tip. Since the rubber pad 3 can stably clamp the working tip in the limiting wrench, it can effectively prevent the user's hand from being scratched by the working tip during the installation and removal of the working tip, withstand multiple high-temperature sterilization, and clamp the working tip to prevent loss when it is removed.

[0035] The above-disclosed embodiments are merely one or more preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art can understand that all or part of the processes for implementing the above embodiments and equivalent changes made in accordance with the claims of this application still fall within the scope of this application.

Claims

1. A dental ultrasonic osteotome tip force-limiting wrench, characterized by, The device includes a wrench locking block, a wrench tightening block, a rubber pad, a tightening screw, and a rotating assembly. The rubber pad is disposed between the wrench locking block and the wrench tightening block, and is located at the upper end of the wrench locking block. The tightening screw passes through the wrench locking block and the rubber pad and is threadedly connected to the wrench tightening block, pressing and fixing the rubber pad to the upper end face of the wrench locking block. The wrench locking block has a wrench opening for engaging with the working tip of the wrench. The rubber pad has a clamping opening for elastically holding the working tip. The clamping opening and the wrench opening are coaxially arranged. The rotating assembly is rotatably sleeved on the outer periphery of the wrench locking block and the wrench tightening block, and is used to receive external rotation operations and transmit torque to the wrench locking block.

2. The dental ultrasonic bone scalpel working tip limiting wrench as described in claim 1, characterized in that, The rotating assembly includes a wrench housing, a ratchet, and a cover plate. The ratchet is sleeved on the outer periphery of the wrench locking block. The wrench housing is rotatably sleeved on the outer periphery of the ratchet. The cover plate is sleeved on the wrench tightening block, and the ratchet is located between the cover plate and the wrench locking block.

3. The dental ultrasonic bone scalpel working tip limiting wrench as described in claim 2, characterized in that, The ratchet has multiple ratchet pawls, and the inner wall of the wrench housing is provided with an inner ratchet hole that mates with the ratchet pawls. The ratchet pawls engage with the inner ratchet hole to transmit torque.

4. The dental ultrasonic bone scalpel working tip limiting wrench as described in claim 1, characterized in that, The clamping opening consists of a square hole in the center and multiple strip-shaped notches located outward from the center. The strip-shaped notches all extend radially along the square hole and are connected to the square hole.

5. The dental ultrasonic bone scalpel working tip limiting wrench as described in claim 4, characterized in that, There are four strip-shaped notches, which are evenly distributed around the square hole to form a cross-shaped structure.

6. The dental ultrasonic bone scalpel working tip limiting wrench as described in claim 2, characterized in that, The ratchet is made of plastic.

7. The dental ultrasonic bone scalpel working tip limiting wrench as described in claim 1, characterized in that, The wrench locking block and the wrench tightening block are provided with mutually cooperating flat parts for axial limiting.

8. The dental ultrasonic bone scalpel working tip limiting wrench as described in claim 1, characterized in that, The bottom of the wrench tightening block is provided with a positioning pin, and the wrench locking block is provided with a positioning hole that cooperates with the positioning pin.

Images