Dental handpiece anti-resorption backseat structure convenient to mount and dismount

Abstract

The utility model provides a dental handpiece anti-resorption backseat structure convenient to mount and dismount, and belongs to the technical field of dental medical instruments. Comprising a base, beads, a support, a spring, a bracket and an air return pipe, the base is used for being fixed to the rear end of a dental handpiece handle, an exhaust channel and an air inlet channel are formed in the base, and the exhaust channel is a step-shaped hole. The bead is arranged in the exhaust channel; the support is arranged in the exhaust channel and one end of the support is contacted with the bead; the bracket is of a cylindrical bracket structure, is axially and movably sleeved outside the support and is used for forming an airflow channel; the spring sleeves the bracket and is used for providing elastic force to enable the support to press the bead to seal the air flow channel; the air return pipe is detachably connected into the exhaust channel, and the support is pressed and limited. The support and the bracket are additionally arranged, so that radial swing of the beads is limited, and noise is reduced; and meanwhile, the detachable air return pipe design is adopted, and maintenance is convenient. The structure can effectively prevent the back suction phenomenon, the service life of the dental handpiece is prolonged, and the operation experience of the dental handpiece is improved.

Description

Technical Field

[0001] This utility model belongs to the field of dental medical device technology, specifically relating to a dental handpiece anti-backflow rear seat structure that is easy to install and disassemble, used to prevent backflow of the dental handpiece during operation and avoid contamination of the air passage. Background Technology

[0002] Existing dental handpiece anti-backflow devices, such as those described in patent number CN202421643496.X, rely solely on springs to support the beads, with no axial restriction. In practice, when airflow is unstable, the beads and springs tend to oscillate at high frequencies in the radial direction, generating a "buzzing" noise. This not only affects the operating experience for both doctors and patients but may also reduce the lifespan of the device. Furthermore, the existing structure is relatively complex to install and disassemble, making routine maintenance difficult.

[0003] To address the aforementioned problems, this utility model proposes an improved anti-backflow seat structure. By adding supports and brackets, the radial swing of the beads is limited, while the overall structure is optimized to facilitate installation and disassembly. Utility Model Content

[0004] The technical problem solved by this utility model is to provide a dental handpiece anti-backflow rear seat structure that is easy to install and disassemble. The purpose of this utility model is to design a dental handpiece anti-backflow rear seat structure that is simple in structure, easy to install, and can effectively reduce noise.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An easy-to-install and easy-to-remove dental handpiece anti-backflow seat structure, including a base, beads, support, spring, bracket, and return air tube;

[0007] The base is used to fix the dental handpiece handle to the rear end. The base is provided with an exhaust channel and an air inlet channel. The exhaust channel is a stepped hole.

[0008] The beads are located in the exhaust channel;

[0009] The support is located in the exhaust channel and one end of it is in contact with the bead.

[0010] The bracket is a cylindrical bracket structure, which is axially movably sleeved on the outside of the support to form an airflow channel;

[0011] The spring is sleeved on the bracket to provide elastic force so that the bracket presses the bead to seal the airflow channel;

[0012] The return air pipe is detachably connected to the exhaust channel, pressing the bracket down to limit its position.

[0013] Further defining the above scheme, the support is axially movable in the inner hole of the bracket, one end of the spring rests on the bracket and the other end rests on the support, the spring pushes the support and the bead forward to seal the exhaust channel on the base; when the airflow force is greater than the spring force, the bead moves backward to open the airflow channel.

[0014] Further defining the above scheme, the support is stepped, with a spherical groove at its larger end. The spherical groove and the contact surface of the bead are tightly fitted to reduce radial sway.

[0015] As a further limitation of the above scheme, the support has n grooves on its side for airflow, where n>2.

[0016] Further specifying the above scheme, the wire diameter of the spring is 0.1-0.5mm.

[0017] Further defining the above solution, one end of the return air pipe is threaded for detachable connection with the exhaust channel of the base, and the other end of the return air pipe is provided with a wrench.

[0018] As a further limitation of the above scheme, one end of the exhaust channel is tapered and its tapering matches the shape of the bead.

[0019] Advantages of this utility model compared to the prior art:

[0020] 1. This solution, by adding supports and brackets, avoids radial oscillation of the spring and limits the radial oscillation of the beads in the hole, effectively reducing noise; at the same time, this structure can effectively prevent back suction, improve the service life of dental handpieces and the operating experience.

[0021] 2. This solution adopts a detachable return air pipe design, which is convenient for installation and disassembly, has a simple structure, is easy to maintain, clean and replace.

[0022] 3. This solution optimizes the spring wire diameter to ensure moderate elasticity, which can effectively seal the airflow without excessively obstructing it. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of the base in this utility model;

[0025] Figure 3 This is a cross-sectional view of the base in this utility model;

[0026] Figure 4 This is a three-dimensional schematic diagram of the support in this utility model;

[0027] Figure 5 This is a cross-sectional view of the support in this utility model;

[0028] Figure 6 This is a three-dimensional schematic diagram of the bracket in this utility model;

[0029] Figure 7 This is a front view of the bracket in this utility model;

[0030] Figure 8 This is a cross-sectional view of the bracket in this utility model;

[0031] Figure 9 This is a three-dimensional schematic diagram of the return air pipe in this utility model;

[0032] Figure 10 This is a cross-sectional view of the return air pipe in this utility model. Detailed Implementation

[0033] 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 scope of protection of the present utility model.

[0034] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0035] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0036] Please see Figure 1-10 The embodiments of this utility model are described in detail below.

[0037] Example: See Figure 1As shown, the dental handpiece anti-backflow rear seat structure, which is easy to install and disassemble, includes a base 1, a bead 2, a support 3, a spring 4, a bracket 5, and a return air tube 6; see reference. Figure 2-3 As shown, the base 1 is used to fix the dental handpiece handle to the rear end. The base 1 is provided with an exhaust channel 1-1 and an air inlet channel 1-2. The exhaust channel 1-1 is a stepped hole. The bead 2 is disposed in the exhaust channel 1-1 to seal the airflow channel. The support 3 is disposed in the exhaust channel 1-1 and one end of it contacts the bead 2. The bracket 5 is a cylindrical bracket structure, which is axially movable outside the support 3 to form an airflow channel. The spring 4 is sleeved on the bracket 5 to provide elastic force so that the support 3 presses the bead 2 to seal the airflow channel. The return air pipe 6 is detachably connected to the exhaust channel 1-1 to press and limit the bracket 5.

[0038] This embodiment avoids radial oscillation of the spring by adding a support and bracket, and restricts the radial oscillation of the beads in the hole, effectively reducing noise; at the same time, this structure can effectively prevent back suction, improve the service life of the dental handpiece and the operating experience.

[0039] In one specific implementation, see Figure 1 As shown, the support 3 is axially movable in the inner hole of the bracket 5. One end of the spring 4 rests on the bracket 5 and the other end rests on the support 3. The spring 4 pushes the support 3 and the bead 2 forward to seal the exhaust channel 1-1 on the base 1. When the airflow force is greater than the spring force of the spring 4, the bead 2 moves backward to open the airflow channel.

[0040] In the above structure, the spring is sleeved on the bracket, and the bracket moves axially in the inner hole of the bracket to avoid radial swing.

[0041] In one specific implementation, see Figure 4-5 As shown, the support 3 is stepped, and its large end is provided with a spherical groove 3-1. The spherical groove 3-1 and the contact surface with the bead 2 are tightly fitted to reduce radial sway.

[0042] One end of the exhaust channel 1-1 is tapered, and its tapering matches the shape of the bead 2.

[0043] The above structure, through improvements to the exhaust channel and support structure, is well adapted to the beads, preventing radial movement of the beads.

[0044] In one specific embodiment, the support 5 has n grooves 5-1 on its side for airflow to pass through, where n>2.

[0045] The above structure, through the design of the grooves on the bracket, ensures that a smooth airflow channel can still be formed after all components are installed, facilitating exhaust.

[0046] In one specific embodiment, the wire diameter of the spring 4 is 0.1-0.5 mm.

[0047] The above structure optimizes the spring wire diameter to ensure moderate elasticity, which can effectively seal the airflow without excessively obstructing it.

[0048] In one specific embodiment, one end of the return air pipe 6 is provided with a thread for detachable connection with the exhaust channel 1-1 of the base 1, and the other end of the return air pipe 6 is provided with a wrench for easy disassembly and maintenance.

[0049] The above structure adopts a detachable return air pipe design, which is convenient for installation and disassembly, has a simple structure, is easy to maintain, and is easy to clean and replace.

[0050] Working principle:

[0051] 1. Non-working state: Spring 4 pushes support 3 and bead 2 forward. Bead 2 is in close contact with the tapered part in exhaust channel 1-1 to seal the airflow channel and is in a closed state to prevent back suction.

[0052] 2. Working state: When the dental handpiece is started, the airflow pressure acts on the bead 2, which is greater than the elastic force of the spring 4. Overcoming the elastic force of the spring 4, the bead 2 moves backward. At this time, an airflow channel is formed between the bead 2 and the taper of the exhaust channel 1-1. The airflow passes through the gap between the bead 2 and the taper, and enters the return air pipe 6 through the groove 5-1 of the bracket 5, so that the handpiece can work normally.

[0053] 3. Stop working: When the working airflow stops, the spring 4 pushes the bead 2 forward to reset under the action of elastic force, re-sealing the tapered section of the exhaust channel 1-1 and preventing back suction.

[0054] This invention, by adding a support and bracket, avoids radial oscillation of the spring and limits the radial oscillation of the beads in the hole, effectively reducing noise; the structure can also effectively prevent back suction, improve the service life and operating experience of the dental handpiece; the structure is simple, easy to install, and easy to maintain.

[0055] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A dental handpiece anti-backflow rear seat structure that is easy to install and disassemble, characterized in that: Includes base (1), beads (2), support (3), spring (4), bracket (5), and air return pipe (6); The base (1) is used to fix the dental handpiece handle to the rear end. The base (1) is provided with an exhaust channel (1-1) and an air inlet channel (1-2). The exhaust channel (1-1) is a stepped hole. The bead (2) is disposed in the exhaust channel (1-1); The support (3) is located in the exhaust channel (1-1) and one end of it is in contact with the bead (2); The bracket (5) is a cylindrical bracket structure, which is axially movably sleeved on the outside of the support (3) to form an airflow channel; The spring (4) is sleeved on the bracket (5) to provide elastic force so that the support (3) presses the bead (2) to seal the airflow channel; The return air pipe (6) is detachably connected to the exhaust channel (1-1) to press down and limit the bracket (5).

2. The dental handpiece anti-backflow rear seat structure for easy installation and disassembly according to claim 1, characterized in that: The support (3) is axially movable in the inner hole of the bracket (5). One end of the spring (4) rests on the bracket (5) and the other end rests on the support (3). The spring (4) pushes the support (3) and the bead (2) forward to seal the exhaust channel (1-1) on the base (1). When the airflow force is greater than the spring force of the spring (4), the bead (2) moves backward to open the airflow channel.

3. The dental handpiece anti-backflow rear seat structure for easy installation and disassembly according to claim 1, characterized in that: The support (3) is stepped, and its large end is provided with a spherical groove (3-1). The contact surface between the spherical groove (3-1) and the bead (2) is tightly fitted to reduce radial sway.

4. The dental handpiece anti-backflow rear seat structure for easy installation and disassembly according to claim 1, characterized in that: The support (5) has n slots (5-1) on its side for airflow to pass through, where n>2.

5. The dental handpiece anti-backflow rear seat structure for easy installation and disassembly according to claim 1, characterized in that: The wire diameter of the spring (4) is 0.1-0.5 mm.

6. The dental handpiece anti-backflow rear seat structure for easy installation and disassembly according to claim 1, characterized in that: One end of the return air pipe (6) is threaded and is used to detachably connect to the exhaust channel (1-1) of the base (1). The other end of the return air pipe (6) is provided with a wrench.

7. The dental handpiece anti-backflow rear seat structure for easy installation and disassembly according to claim 1, characterized in that: One end of the exhaust channel (1-1) is tapered and its tapering matches the shape of the bead (2).

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