A multi-size interdental brush

Abstract

This utility model discloses a multi-size interdental brush, comprising: a shell; an interdental brush body assembly, including a bracket installed inside the shell and multiple interdental brush bodies of different sizes installed in sliding brackets, a first spring sleeved between the interdental brush body and the bracket; a push rod, which is installed on the upper end of the shell by a second spring, and the upper end of the push rod protrudes out of the upper end of the shell under the elastic force of the second spring; a push rod, which is oscillatingly installed between the push rod and the interdental brush body assembly, and the lower end of the push rod can swing to the upper end of any interdental brush body; when the lower end of the push rod swings to contact the upper end of an interdental brush body, the push rod is pressed down to drive the push rod to push the interdental brush body downward, so that the brush head at the lower end of the interdental brush body passes through the bracket and extends out of the lower end of the shell; when the push rod is lifted and reset by the second spring, the interdental brush body is lifted and reset by the first spring, and the push rod is also reset.

Description

Technical fields:

[0001] This utility model relates to the field of daily necessities technology, and specifically refers to a multi-size interdental brush. Background technology:

[0002] Interdental brushes are similar to regular toothbrushes, consisting of a brush head and a handle. The biggest difference lies in the design of the brush head. Interdental brushes have a cone-shaped brush head, available in different sizes to suit different widths of interdental spaces. You can choose different sizes of brush heads to clean between your teeth and the tooth surface as needed. This can remove debris and dirt from between your teeth and help clean your teeth.

[0003] Chinese utility model patent application number 202322197716.2 discloses a replaceable interdental brush with a core, comprising a handle, a screw cap, a fixing block, and a brush body. The handle end has external threads, and the screw cap has internal threads, with the external threads of the handle end matching the internal threads of the screw cap. One end of the fixing block abuts against the handle, and the other end extends out of the screw cap. The brush body includes a core and bristles. The core is made of twisted amorphous alloy wire, with one end clamped in the fixing block and the bristles connected to the periphery of the other end. This interdental brush has a simple structure, is easy to manufacture, and is environmentally friendly, making it suitable for widespread application. The fixed end of the brush body is secured to the end of the handle by the fixing block and the screw cap. This design allows for replacement of the brush body if it breaks during use, while other components can be reused.

[0004] The interdental brushes described above can be replaced with different sized brush heads to meet different usage requirements. However, the interdental brushes described above cannot simultaneously store brush heads of different sizes, nor can they be quickly replaced with brush heads of different sizes, making them extremely inconvenient to use.

[0005] In view of the above, the inventors propose the following technical solution. Utility Model Content:

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-size interdental brush.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The multi-size interdental brush includes: a shell; an interdental brush body assembly, which includes a bracket installed inside the shell and multiple interdental brush bodies of different sizes installed in the sliding brackets, and a first spring sleeved between the interdental brush body and the bracket; a push rod, which is installed on the upper end of the shell by a second spring, and the upper end of the push rod protrudes out of the upper end of the shell under the elastic force of the second spring; a push rod, which is installed between the push rod and the interdental brush body assembly in a swingable manner, and the lower end of the push rod can swing to the upper end of any interdental brush body; when the lower end of the push rod swings to contact the upper end of an interdental brush body, the push rod is pressed down to drive the push rod to push the interdental brush body downward, so that the brush head at the lower end of the interdental brush body passes through the bracket and extends out of the lower end of the shell; when the push rod is lifted and reset by the second spring, the interdental brush body is lifted and reset by the first spring, and the push rod is also reset.

[0008] Furthermore, in the above technical solution, an end cap is fitted at the lower end of the outer shell, which covers the outlet provided at the lower end of the outer shell for the brush head to extend out. The end cap can be pulled out relative to the lower end of the outer shell and then fastened to the upper end of the outer shell. The rod inside the end cap drives the press down, wherein the length of the rod is greater than or equal to the stroke of the brush head moving downward and extending out of the lower end of the outer shell.

[0009] Furthermore, in the above technical solution, a first magnetic attractor is provided inside the end cap, a second magnetic attractor is provided at the lower end of the outer shell, and a third magnetic attractor is provided at the upper end of the outer shell; when the end cap is fitted onto the lower end of the outer shell, the first magnetic attractor and the second magnetic attractor are magnetically attracted and fixed; when the end cap is fitted onto the upper end of the outer shell, the first magnetic attractor and the third magnetic attractor are magnetically attracted and fixed.

[0010] Furthermore, in the above technical solution, the end cap includes a cap body, a first magnetic suction member embedded and fixed inside the cap body, and a cap cylinder sleeved and fixed outside the upper end of the cap body. The cap body is also formed with a protruding rod.

[0011] Furthermore, in the above technical solution, the lower end of the push rod is provided with a spherical concave surface; the upper end of the push rod is provided with a spherical head, which is placed in the spherical concave surface and serves as the fulcrum for the lower end of the push rod to swing.

[0012] Furthermore, in the above technical solution, the upper periphery of the bracket is provided with a plurality of vertically spaced sliding holes, and the lower periphery of the bracket is provided with partition grooves corresponding to the sliding holes one by one; the interdental brush body is inserted into the sliding holes, and the brush head at the lower end of the interdental brush body is placed in the partition groove, and the first spring is placed in the sliding hole; the upper end of the bracket is provided with a limiting ring, which covers part of the opening at the upper end of the sliding hole to prevent the interdental brush body from being ejected from the upper end of the bracket under the elastic force of the first spring; and the lower end of the push rod is placed in the limiting ring and can be inserted into the sliding hole to drive the interdental brush body to slide downward in the sliding hole.

[0013] Furthermore, in the above technical solution, the interdental brush body includes: a slide rod, a deformable brush rod disposed at the lower end of the slide rod, and a brush head disposed at the lower end of the brush rod. The upper end of the slide rod is provided with an outwardly protruding sliding part, which is disposed in a sliding hole and at least partially contacts the inner wall of the sliding hole. The first spring is sleeved on the periphery of the slide rod, and the upper end of the first spring contacts the lower end face of the sliding part, and the lower end of the first spring contacts the bracket.

[0014] Furthermore, in the above technical solution, the upper end of the bracket is provided with several positioning holes; the lower end of the limiting ring is provided with multiple positioning posts, which are embedded and fixed with the positioning holes, so that the limiting ring is fixed to the upper end of the bracket; the lower end of the sliding hole is provided with a step, which is provided with a guide hole that connects to the sliding hole and has an inner diameter smaller than the sliding hole, the first spring contacts the step, and the sliding rod passes through the guide hole.

[0015] Furthermore, in the above technical solution, the limiting ring is also provided with several circumferentially distributed limiting ribs, which are tensioned and positioned with the inner wall of the outer shell; the push rod is also fitted with a ring body for counterweight.

[0016] Furthermore, in the above technical solution, the outer shell includes a main shell, an upper shell embedded and fixed to the upper end of the main shell, a cover ring covering the upper end of the upper shell and serving as a third magnetic attraction element, and a lower shell spirally installed at the lower end of the main shell, the lower end of which has a funnel-shaped outlet; the lower end of the pusher, the second spring, and the push rod are all disposed in the upper shell, the interdental brush body assembly is disposed in the main shell, and the lower end of the bracket and the brush head at the lower end of the interdental brush body both extend into the lower shell; the inner wall of the upper shell is provided with several guide grooves, and the lower end of the pusher is provided with several sliders, the upper end of the pusher passes through the upper shell and the cover ring and extends out of the upper end surface of the cover, and the sliders are installed in conjunction with the guide grooves, and the sliders can slide axially relative to the guide grooves; a limiting space is formed between the sliders to limit the second spring.

[0017] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: The present invention can simultaneously store / collect multiple interdental brush bodies of different sizes without exposing them, thus ensuring the cleanliness of the interdental brush bodies, making them cleaner and more hygienic to use, and extremely convenient to carry; In addition, the present invention can tilt the outer shell in different directions, so that the lower end of the push rod can swing to the upper end of the interdental brush bodies of different sizes, thereby extending the brush heads of the lower end of the interdental brush bodies of different sizes out of the outer shell to meet different usage requirements. Attached image description:

[0018] Figure 1 This is a perspective view of the present invention;

[0019] Figure 2 This is a perspective view of the present invention from another angle;

[0020] Figure 3 This is a cross-sectional view (initial state) of the present invention;

[0021] Figure 4 This is a cross-sectional view of the present invention (in use).

[0022] Figure 5 This is an exploded perspective view of the present invention;

[0023] Figure 6 This is a diagram illustrating the usage process of this utility model;

[0024] Figure 7 This is a diagram showing the usage state of this utility model;

[0025] Figure 8 This is an exploded view of the utility model in use. Detailed implementation method:

[0026] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0027] See Figure 1-8 As shown, a multi-size interdental brush includes: a housing 1, an interdental brush body assembly 200, a push button 5, and a push rod 6.

[0028] The interdental brush body assembly 200 includes a bracket 2 installed inside the outer shell 1 and multiple interdental brush bodies 3 of different sizes installed in the sliding brackets 2, and a first spring 4 sleeved between the interdental brush body 3 and the bracket 2; a pusher 5 is installed on the upper end of the outer shell 1 by a second spring 51, and the upper end of the pusher 5 protrudes out of the upper end of the outer shell 1 under the elastic force of the second spring 51; a push rod 6 is installed in a swingable manner between the pusher 5 and the interdental brush body assembly 200, and the lower end of the push rod 6 can swing to the upper end of any interdental brush body 3; when the lower end of the push rod 6 swings to contact the upper end of an interdental brush body 3, the pusher 5 is pressed down to drive the push rod 6 to push the interdental brush body 3 downward, so that the brush head 31 at the lower end of the interdental brush body 3 passes through the bracket 2 and protrudes out of the lower end of the outer shell 1; when the pusher 5 is lifted and reset by the second spring 51, the interdental brush body 3 is lifted and reset by the first spring 4, and the push rod 6 is also reset. In other words, in the normal state (i.e., the initial state), the upper end of the pusher 5 protrudes beyond the upper end of the outer shell 1 under the elastic force of the second spring 51. At the same time, each interdental brush body 3 is pushed upward by the elastic force of the first spring 4 surrounding it. At this time, the push rod 6 is positioned between the pusher 5 and the interdental brush body assembly 200, and the lower end of the push rod 6 can swing to the upper end of any interdental brush body 3. When the interdental brush is needed, the outer shell 1 is tilted so that the lower end of the push rod 6 can swing to a specific interdental space. At the top of the brush body 3, press down the button 5. The button 5 drives the push rod 6 to push the interdental brush body 3 downward, so that the brush head 31 at the lower end of the interdental brush body 3 passes through the bracket 2 and extends out of the lower end of the outer shell 1, so that the brush head 31 can be used to clean the gaps between teeth. In this way, the outer shell 1 can be tilted in different directions, so that the lower end of the push rod 6 can swing to the upper end of the interdental brush body 3 of different sizes, thereby extending the brush head 31 at the lower end of the interdental brush body 3 of different sizes out of the outer shell 1 to meet different usage requirements.

[0029] To enhance ease of use, the following design was implemented: An end cap 7 is fitted onto the lower end of the outer casing 1. This end cap 7 covers the outlet 101 at the lower end of the outer casing 1 through which the brush head 31 extends. The end cap 7 can be pulled out relative to the lower end of the outer casing 1 and then fastened to the upper end of the outer casing 1. A rod 71 inside the end cap 7 drives the push button 5 downwards. The length of the rod 71 is greater than or equal to the stroke by which the brush head 31 extends downwards beyond the lower end of the outer casing 1. That is, after the end cap 7 is fastened to the upper end of the outer casing 1, it can drive the push button 5 downwards, allowing the brush head 31 at the lower end of the interdental brush body 3 to pass through the bracket 2 and extend beyond the lower end of the outer casing 1, making it more convenient to use. The end cap 7 is fixed to the upper end of the outer shell 1. It can overcome the elastic force of the first and second springs, thus ensuring that the brush head 31 at the lower end of the interdental brush body 3 is always extended outside the lower end of the outer shell 1, making it more convenient to use. When not in use, the end cap 7 is pulled out relative to the upper end of the outer shell 1. At this time, the pusher 5 returns to its original position under the elastic force of the second spring, and the interdental brush body 3 and push rod 6 return to their original position under the elastic force of the first spring. Then, the end cap 7 is put back on the lower end of the outer shell 1. The end cap 7 covers the outlet 101 at the lower end of the outer shell 1 for the brush head 31 to extend, thereby preventing foreign objects from entering and ensuring that the invention is cleaner and more hygienic, and more convenient to use. The end cap 7 is fixedly assembled with the upper or lower end of the outer shell 1 by tensioning.

[0030] To ensure a more stable assembly between the end cap 7 and the upper or lower end of the outer shell 1, the following design is implemented: a first magnetic suction member 72 is provided inside the end cap 7, a second magnetic suction member 11 is provided at the lower end of the outer shell 1, and a third magnetic suction member 12 is provided at the upper end of the outer shell 1; when the end cap 7 is fitted onto the lower end of the outer shell 1, the first magnetic suction member 72 and the second magnetic suction member 11 are magnetically attracted and fixed; when the end cap 7 is fitted onto the upper end of the outer shell 1, the first magnetic suction member 72 and the third magnetic suction member 12 are magnetically attracted and fixed, thereby ensuring a more stable assembly between the end cap 7 and the upper or lower end of the outer shell 1. In particular, after the end cap 7 is fixedly assembled with the upper end of the outer shell 1, it can be ensured that the end cap 7 and the upper end of the outer shell 1 will not accidentally detach, thereby ensuring that the rod 71 of the end cap 7 can always keep the push button 5 in a pressed state, so that the brush head 31 at the lower end of the interdental brush body 3 always extends out of the lower end of the outer shell 1, improving the convenience of use.

[0031] In this embodiment, the first magnetic attractor 72 is a strong magnet, and both the first magnetic attractor 72 and the third magnetic attractor 12 are stainless iron, so that when the first magnetic attractor 72 comes into contact with the first magnetic attractor 72 or the third magnetic attractor 12, they can achieve a stable adsorption and fixation function.

[0032] The end cap 7 includes a cap body 73, a first magnetic suction member 72 embedded and fixed inside the cap body 73, and a cap cylinder 74 sleeved and fixed outside the upper end of the cap body 73. The cap body 73 is also formed with a protruding rod 71, which separates the cap body 73 from the cap cylinder 74. This is to better form the rod 71 on the cap body 73, improve work efficiency, and reduce production difficulty.

[0033] In this embodiment, the lower end of the push rod 5 is provided with a spherical concave surface 52; the upper end of the push rod 6 is provided with a spherical head 61, which is placed in the spherical concave surface 52 and serves as the fulcrum for the lower end of the push rod 6 to swing. The spherical head 61 can swing smoothly within the spherical concave surface 52 and serves as the fulcrum for the lower end of the push rod 6 to swing, so that the lower end of the push rod 6 swings more smoothly. At the same time, this design can also prevent the upper end of the push rod 6 from detaching from the lower end of the push rod 5, so that after the push rod 5 is pressed, the push rod 6 can be smoothly driven to move downward.

[0034] The push rod 6 is also fitted with a ring 60 for counterweight. When the outer shell 1 is tilted, the ring 60 will tilt accordingly and fall on the lower end of the push rod 6. Under the action of the weight of the ring 60, the lower end of the push rod 6 is better driven to swing, so that the lower end of the push rod 6 can swing smoothly to the upper end of one of the interdental brush bodies 3 and make contact, so that the push rod 6 can drive the interdental brush body 3 to move downward more smoothly in the later stage.

[0035] In this embodiment, the upper periphery of the bracket 2 is provided with a plurality of vertically spaced sliding holes 21, and the lower periphery of the bracket 2 is provided with partition grooves 22 corresponding to the sliding holes 21 one by one. The interdental brush body 3 passes through the sliding holes 21, and the brush head 31 at the lower end of the interdental brush body 3 is placed in the partition groove 22. The first spring 4 is placed in the sliding hole 21. The lower end of the sliding hole 21 is provided with a step 211, and the step 211 is provided with a guide hole 212 that connects to the sliding hole 21 and has an inner diameter smaller than the sliding hole 21. The first spring 4 contacts the step 211, so that the first spring 4 is more stably installed between the interdental brush body 3 and the bracket 2, thereby improving the stability of the interdental brush body 3. The sliding rod 32 passes through the guide hole 212, which allows it to slide more smoothly.

[0036] In addition, a limiting ring 23 is provided at the upper end of the bracket 2. The limiting ring 23 covers part of the opening at the upper end of the sliding hole 21 to prevent the toothbrush body 3 from being ejected from the upper end of the bracket 2 under the elastic force of the first spring 4. The lower end of the push rod 6 is placed inside the limiting ring 23 and can be inserted into the sliding hole 21 to drive the toothbrush body 3 to slide downward in the sliding hole 21, thus ensuring the quality of this utility model.

[0037] The interdental brush body 3 includes: a slide bar 32, a deformable brush rod 33 disposed at the lower end of the slide bar 32, and a brush head 31 disposed at the lower end of the brush rod 33. The upper end of the slide bar 32 is provided with an outwardly protruding sliding part 321. The sliding part 321 is disposed in the sliding hole 21 and at least partially contacts the inner wall of the sliding hole 21. The first spring 4 is sleeved around the slide bar 32, and the upper end of the first spring 4 contacts the lower end face of the sliding part 321. The lower end of the first spring 4 contacts the bracket 2, so that the first spring 4 is more stably installed between the slide bar 32 and the bracket 2, thereby improving the stable elasticity of the interdental brush body 3.

[0038] The brush handle 33 is deformable, so that after the interdental brush body 3 is pressed down, the brush handle 33 deforms so that the brush head 31 can pass smoothly through the outlet 101 and extend out of the lower end face of the outer shell 1.

[0039] The upper end of the bracket 2 is provided with a plurality of positioning holes 25; the lower end of the limiting ring 23 is provided with a plurality of positioning posts 231, which are embedded and fixed with the positioning holes 25, so that the limiting ring 23 is fixed to the upper end of the bracket 2. Its assembly structure is simple and easy to install.

[0040] The upper end of the limiting ring 23 is provided with a first spring groove, and the lower end of the second spring is embedded in the first spring groove.

[0041] The limiting ring 23 is also provided with several circumferentially distributed limiting ribs 232. These limiting ribs 232 are tensioned and positioned with the inner wall of the outer shell 1, which can make the assembly of the bracket 2 and the outer shell 1 more stable.

[0042] The outer casing 1 includes a main casing 13, an upper casing 14 embedded and fixed to the upper end of the main casing 13, a cover ring covering the upper end of the upper casing 14 and serving as a third magnetic suction element 12, and a lower casing 15 spirally installed at the lower end of the main casing 13. The lower end of the lower casing 15 has a funnel-shaped outlet 101. The lower end of the pusher 5, the second spring 51, and the push rod 6 are all disposed in the upper casing 14. The interdental brush body assembly 200 is disposed in the main casing 13, and the lower end of the bracket 2 and the brush head 31 of the interdental brush body 3 both extend into the lower casing 15. The cover ring is made of stainless iron and has a decorative function.

[0043] The inner wall of the upper housing 14 is provided with a plurality of guide grooves 141, and the lower periphery of the push button 5 is provided with a plurality of sliders 53. The upper end of the push button 5 passes through the upper housing 14 and the cover 73 and extends out of the upper end face of the cover ring. The sliders 53 are installed in cooperation with the guide grooves 141. The sliders 53 can slide axially relative to the guide grooves 141, making the assembly of the push button 5 and the outer housing 1 more stable and the axial sliding of the push button 5 smoother, which can improve the product quality of this utility model. The sliders 53 form a limiting space for limiting the second spring 51, which ensures that the second spring 51 will not move around randomly and improves the stability of the assembly structure of the second spring 51.

[0044] In summary, this invention can simultaneously store / collect multiple interdental brush bodies 3 of different sizes without exposing them, thus ensuring the cleanliness of the interdental brush bodies 3, making them cleaner and more hygienic to use, and extremely convenient to carry. In addition, this invention can tilt the outer shell 1 in different directions, allowing the lower end of the push rod 6 to swing to the upper end of interdental brush bodies 3 of different sizes, thereby extending the brush heads 31 of the lower end of the interdental brush bodies 3 of different sizes out of the outer shell 1 to meet different usage requirements.

[0045] Of course, the above description is only a specific embodiment of the present utility model and is not intended to limit the scope of the present utility model. All equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model should be included in the scope of the claims of the present utility model.

Claims

1. A multi-size interdental brush, characterized in that: It includes: Outer shell (1); The interdental brush body assembly (200) includes a bracket (2) installed in the housing (1) and multiple interdental brush bodies (3) of different sizes installed in the sliding mounting brackets (2), and a first spring (4) sleeved between the interdental brush body (3) and the bracket (2). The button (5) is mounted on the upper end of the outer shell (1) by a second spring (51), and the upper end of the button (5) protrudes out of the upper end of the outer shell (1) under the elastic force of the second spring (51). A push rod (6) is mounted in a swingable manner between the push rod (5) and the interdental brush body assembly (200), and the lower end of the push rod (6) can swing to the upper end of any interdental brush body (3); When the lower end of the push rod (6) swings to contact the upper end of a toothbrush body (3), and the push button (5) is pressed down to drive the push rod (6) to push the toothbrush body (3) downward, so that the brush head (31) at the lower end of the toothbrush body (3) passes through the bracket (2) and extends out of the lower end of the outer shell (1); when the push button (5) is lifted and reset by the second spring (51), the toothbrush body (3) is lifted and reset by the first spring (4), and the push rod (6) is also reset.

2. The multi-size interdental brush according to claim 1, characterized in that: The lower end of the outer shell (1) is fitted with an end cap (7), which covers the outlet (101) provided at the lower end of the outer shell (1) for the brush head (31) to extend out. The end cap (7) can be pulled out relative to the lower end of the outer shell (1) and then fixed to the upper end of the outer shell (1). The rod (71) inside the end cap (7) drives the pusher (5) to press down. The length of the rod (71) is greater than or equal to the stroke of the brush head (31) as it moves downward and extends out of the lower end of the outer shell (1).

3. A multi-size interdental brush according to claim 2, characterized in that: The end cap (7) is provided with a first magnetic absorbing element (72), the lower end of the outer shell (1) is provided with a second magnetic absorbing element (11), and the upper end of the outer shell (1) is provided with a third magnetic absorbing element (12). When the end cap (7) is fitted onto the lower end of the outer shell (1), the first magnetic absorbing element (72) and the second magnetic absorbing element (11) are magnetically fixed together. When the end cap (7) is fitted onto the upper end of the outer shell (1), the first magnetic absorbing element (72) and the third magnetic absorbing element (12) are magnetically fixed together.

4. A multi-size interdental brush according to claim 3, characterized in that: The end cap (7) includes a cap body (73), a first magnetic suction member (72) embedded and fixed inside the cap body (73), and a cap cylinder (74) sleeved and fixed outside the upper end of the cap body (73). The cap body (73) also has a protruding rod body (71).

5. A multi-size interdental brush according to any one of claims 1-4, characterized in that: The lower end of the push rod (5) is provided with a spherical concave surface (52); the upper end of the push rod (6) is provided with a spherical head (61), which is placed in the spherical concave surface (52) and serves as the fulcrum for the lower end of the push rod (6) to swing.

6. A multi-size interdental brush according to claim 5, characterized in that: The bracket (2) has a plurality of vertically spaced sliding holes (21) on its upper periphery, and a partition groove (22) corresponding to each sliding hole (21) on its lower periphery. The interdental brush body (3) is inserted into the sliding hole (21), and the brush head (31) at the lower end of the interdental brush body (3) is placed in the partition groove (22). The first spring (4) is placed in the sliding hole (21), and a limiting ring (23) is provided at the upper end of the bracket (2). The limiting ring (23) covers part of the opening at the upper end of the sliding hole (21) to prevent the interdental brush body (3) from being ejected from the upper end of the bracket (2) under the elastic force of the first spring (4). The lower end of the push rod (6) is placed in the limiting ring (23) and can be inserted into the sliding hole (21) to drive the interdental brush body (3) to slide downward in the sliding hole (21).

7. A multi-size interdental brush according to claim 6, characterized in that: The interdental brush body (3) includes: a slide bar (32), a deformable brush bar (33) disposed at the lower end of the slide bar (32), and a brush head (31) disposed at the lower end of the brush bar (33). The upper end of the slide bar (32) is provided with an outwardly protruding sliding part (321). The sliding part (321) is disposed in the sliding hole (21) and at least partially contacts the inner wall of the sliding hole (21). The first spring (4) is sleeved on the periphery of the slide bar (32), and the upper end of the first spring (4) contacts the lower end face of the sliding part (321). The lower end of the first spring (4) contacts the bracket (2).

8. A multi-size interdental brush according to claim 7, characterized in that: The bracket (2) has several positioning holes (25) at its upper end; the limiting ring (23) has several positioning posts (231) at its lower end, which are embedded and fixed to the positioning holes (25) so that the limiting ring (23) is fixed to the upper end of the bracket (2); the sliding hole (21) has a step (211) at its lower end, which has a guide hole (212) that connects to the sliding hole (21) and has an inner diameter smaller than that of the sliding hole (21). The first spring (4) contacts the step (211), and the sliding rod (32) passes through the guide hole (212).

9. A multi-size interdental brush according to claim 8, characterized in that: The limiting ring (23) is also provided with several circumferentially distributed limiting ribs (232), which are tensioned and positioned with the inner wall of the outer shell (1); the push rod (6) is also provided with a ring body (60) for counterweight.

10. A multi-size interdental brush according to claim 5, characterized in that: The outer shell (1) includes a main shell (13), an upper shell (14) embedded and fixed to the upper end of the main shell (13), a cover ring covering the upper end of the upper shell (14) and serving as a third magnetic suction element (12), and a lower shell (15) screwed onto the lower end of the main shell (13). The lower end of the lower shell (15) has a funnel-shaped outlet (101). The lower end of the pusher (5), the second spring (51), and the push rod (6) are all located in the upper shell (14). The interdental brush body assembly (200) is located in the main shell (13), and the lower end of the bracket (2) and the brush head (31) at the lower end of the interdental brush body (3) both extend into the lower shell (15). The inner wall of the upper housing (14) is provided with a plurality of guide grooves (141), and the lower periphery of the pusher (5) is provided with a plurality of sliders (53). The upper end of the pusher (5) passes through the upper housing (14) and the cover ring and extends out of the upper end face of the cover (73). The sliders (53) are installed in cooperation with the guide grooves (141), and the sliders (53) can slide axially relative to the guide grooves (141). A limiting space is formed between the sliders (53) to limit the second spring (51).

Images