A brush head mounting structure of an electric toothbrush
The design of rubber bumps and spring-driven rollers solves the problem of poor sealing at the connection between the electric toothbrush head and the toothbrush handle, achieving a secure installation and waterproof effect for the toothbrush head.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- JIANGXI AISHUKOU DAILY NECESSITIES CO LTD
- Filing Date
- 2025-06-04
- Publication Date
- 2026-06-02
AI Technical Summary
Traditional electric toothbrushes often have poor sealing at the connection between the brush head and the handle, allowing water and toothpaste to easily enter the metal shaft and cause mold growth.
The toothbrush head and handle are accurately positioned and securely installed by using a rubber bump and a metal shaft, combined with a spring-driven roller and a sealing ring design. The sealing ring also enhances the waterproof effect.
It improves the secure installation and sealing of the toothbrush head, preventing water and toothpaste from entering the metal shaft and reducing mold growth.
Smart Images
Figure CN224307438U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric toothbrush technology, specifically to a toothbrush head mounting structure for an electric toothbrush. Background Technology
[0002] Electric toothbrushes use the rapid rotation or vibration of a motor to create high-frequency vibrations in the brush head, instantly breaking down toothpaste into fine foam that deeply cleans between teeth. At the same time, the vibration of the bristles promotes blood circulation in the mouth and massages the gum tissue. Electric toothbrushes typically consist of two parts: a handle and a brush head. The brush head is mounted in a set on a metal shaft at the top of the handle, making installation and removal convenient and allowing for regular replacement of the brush head, which is both environmentally friendly and hygienic.
[0003] Traditionally, the toothbrush head is installed behind the toothbrush handle, and there are tiny gaps at the connection point, which cannot guarantee a good seal. During the use of an electric toothbrush, water and toothpaste can easily enter the metal shaft at the top of the toothbrush handle through these gaps, causing dirt to accumulate on the metal shaft and leading to mold growth.
[0004] Therefore, it is necessary to provide a new toothbrush head mounting structure for electric toothbrushes to solve the above-mentioned technical problems. Utility Model Content
[0005] The purpose of this utility model is to provide a toothbrush head mounting structure for an electric toothbrush that is easy to install, increases the firmness of the toothbrush head installation, and provides better waterproofing for the metal shaft.
[0006] To solve the above-mentioned technical problems, the electric toothbrush head mounting structure provided by this utility model includes: a toothbrush handle, a metal shaft fixedly mounted on the top of the toothbrush handle, a toothbrush head disposed above the toothbrush handle, a mounting groove formed at the bottom of the toothbrush head, a connecting groove formed on the inner wall of the top of the mounting groove, rubber protrusions fixedly mounted on both inner walls of the connecting groove, both rubber protrusions contacting the metal shaft, a sealing ring fixedly mounted at the bottom of the toothbrush head, the bottom of the sealing ring contacting the top of the toothbrush handle, and the inner wall of the mounting groove... An arc-shaped groove is formed on the wall. An annular block is fixedly installed on the top of the toothbrush handle. Two side grooves are formed on the annular block. Receiving cavities are formed on the top and bottom inner walls of the two side grooves. Two sliding plates are slidably installed in the four receiving cavities. Springs are fixedly installed on the inner walls of the two side grooves that are close to each other. The two springs are in contact with the two sliding plates respectively. U-shaped blocks are fixedly installed on the two sliding plates. Rollers are rotatably installed on the two U-blocks. The two rolling wheels are slidably installed in the arc-shaped groove.
[0007] Preferably, strip blocks are fixedly installed on the inner walls of both sides of the connecting groove, and both strip blocks are adapted to the metal shaft.
[0008] Preferably, a second sealing ring is fixedly installed on the top of the annular block, and the top of the second sealing ring is in contact with the top inner wall of the mounting groove.
[0009] Preferably, a docking rod is fixedly installed between the inner walls on both sides of each of the four receiving cavities, and the four docking rods are slidably connected to the two sliding plates respectively.
[0010] Preferably, a circular rod is fixedly installed between the inner walls of the two U-shaped blocks on both sides, and the two rolling wheels are respectively rotatably sleeved on the two circular rods.
[0011] Preferably, two oblique grooves are formed on the inner wall of the mounting groove, and the corresponding oblique grooves are connected to the arc-shaped groove.
[0012] Preferably, the top and bottom of the two sliding plates are each inlaid with a plurality of rolling beads, and the plurality of rolling beads are in contact with the inner walls of the four receiving cavities respectively.
[0013] Compared with related technologies, the toothbrush head mounting structure of the electric toothbrush provided by this utility model has the following beneficial effects:
[0014] In this invention, the rubber protrusions and connecting grooves facilitate accurate alignment and quick installation of the toothbrush head and handle. Simultaneously, the rubber protrusions increase the gripping force with the metal shaft, and the strip-shaped block and the notch in the metal shaft form a mechanical latch, locking the toothbrush head in rotation. The spring-driven roller forms a dynamic locking position within the arc-shaped groove, providing elastic locking for the toothbrush head, increasing its installation stability, and reinforcing the two sealing rings with external force to prevent them from being affected by external forces, thus improving waterproofing. Attached Figure Description
[0015] Figure 1 A front view schematic diagram of a preferred embodiment of the toothbrush head mounting structure of the electric toothbrush provided by this utility model;
[0016] Figure 2 This is a frontal sectional view of the present invention.
[0017] Figure 3 for Figure 2 Enlarged schematic diagram of the toothbrush handle and toothbrush head;
[0018] Figure 4 for Figure 3 An enlarged schematic diagram of part A shown in the image;
[0019] Figure 5This is a front view assembly diagram of the toothbrush handle in this utility model;
[0020] Figure 6 This is a frontal sectional view of the toothbrush handle in this utility model;
[0021] Figure 7 This is a frontal sectional view of the toothbrush handle in this utility model;
[0022] Figure 8 for Figure 7 An enlarged schematic diagram of the ring-shaped block shown.
[0023] In the diagram: 1. Toothbrush handle; 2. Metal shaft; 3. Toothbrush head; 4. Mounting groove; 5. Connecting groove; 6. Rubber protrusion; 7. Sealing ring one; 8. Arc groove; 9. Annular block; 10. Side groove; 11. Receiving cavity; 12. Sliding plate; 13. Spring; 14. U-shaped block; 15. Roller; 16. Strip block; 17. Sealing ring two. Detailed Implementation
[0024] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0025] Please refer to the following: Figures 1-8 ,in, Figure 1 A front view schematic diagram of a preferred embodiment of the toothbrush head mounting structure of the electric toothbrush provided by this utility model; Figure 2 This is a frontal sectional view of the present invention. Figure 3 for Figure 2 Enlarged schematic diagram of the toothbrush handle and toothbrush head; Figure 4 for Figure 3 An enlarged schematic diagram of part A shown in the image; Figure 5 This is a front view assembly diagram of the toothbrush handle in this utility model; Figure 6 This is a frontal sectional view of the toothbrush handle in this utility model; Figure 7 This is a frontal sectional view of the toothbrush handle in this utility model; Figure 8 for Figure 7The diagram shows an enlarged view of the annular block. The toothbrush head mounting structure of the electric toothbrush includes: a toothbrush handle 1, a metal shaft 2 fixedly mounted on the top of the toothbrush handle 1, a toothbrush head 3 positioned above the toothbrush handle 1, the toothbrush head 3 fitting into the toothbrush handle 1, a mounting groove 4 at the bottom of the toothbrush head 3, a connecting groove 5 on the inner wall of the top of the mounting groove 4, the metal shaft 2 slidingly mounted within the mounting groove 4 and the connecting groove 5, and rubber protrusions 6 fixedly mounted on the inner walls of both sides of the connecting groove 5. Both rubber protrusions 6 are in contact with the metal shaft 2, providing a guiding function to align the toothbrush handle 1 and the toothbrush head 3, ensuring the metal shaft 2 accurately engages in the connecting groove 5. Simultaneously, the two rubber protrusions 6 abut against the metal shaft 2, increasing the firmness of the toothbrush head 3 mounted on the toothbrush handle 1. A sealing ring is fixedly mounted at the bottom of the toothbrush head 3. The bottom of sealing ring 7 contacts the top of toothbrush handle 1. An arc-shaped groove 8 is provided on the inner wall of mounting groove 4. An annular block 9 is fixedly installed on the top of toothbrush handle 1. Two side grooves 10 are provided on the annular block 9. Receiving cavities 11 are provided on the top and bottom inner walls of the two side grooves 10. Two sliding plates 12 are slidably installed in the four receiving cavities 11. Springs 13 are fixedly installed on the inner walls of the two side grooves 10 that are close to each other. The two springs 13 are in contact with the two sliding plates 12 respectively. U-shaped blocks 14 are fixedly installed on the sides of the two sliding plates 12 that are far apart from each other. Circular rods are fixedly installed between the inner walls of the two U-shaped blocks 14. Rolling wheels 15 are rotatably installed on the two circular rods. The two rolling wheels 15 are slidably installed in the arc-shaped groove 8.
[0026] To prevent the toothbrush head 3 from rotating in contact with the metal shaft 2 when it is vibrated, and to increase the stability of the toothbrush head 3 installation, in this method, strip blocks 16 are fixedly installed on both sides of the inner wall of the connecting groove 5. Both strip blocks 16 are adapted to the metal shaft 2. The tops of the two strip blocks 16 are not the same, and they are aligned with the notches on both sides of the top of the metal shaft 2 respectively.
[0027] To increase the sealing between the toothbrush handle 1 and the toothbrush head 3, in this method, a sealing ring 2 17 is fixedly installed on the top of the annular block 9, and the top of the sealing ring 2 17 contacts the top inner wall of the mounting groove 4.
[0028] To prevent the two sliding plates 12 from slipping out of the four receiving cavities 11, in this method, a connecting rod is fixedly installed between the inner walls on both sides of the four receiving cavities 11. The four connecting rods are slidably connected to the two sliding plates 12 respectively. Multiple rolling balls are embedded in the top and bottom of the two sliding plates 12. The multiple rolling balls are in contact with the inner walls of the four receiving cavities 11 respectively. The multiple rolling balls can increase the smoothness of the sliding of the two sliding plates 12 and reduce wear.
[0029] To facilitate the sliding of the two rollers 15 into and out of the arc-shaped groove 8, in this method, two oblique grooves are opened on the inner wall of the mounting groove 4, and the corresponding oblique grooves are connected to the arc-shaped groove 8.
[0030] The working principle of the toothbrush head mounting structure of the electric toothbrush provided by this utility model is as follows:
[0031] When it is necessary to install the toothbrush head 3 onto the toothbrush handle 1, align the side of the toothbrush head 3 with the side of the toothbrush handle 1 with the button. Observe the position of the two rubber protrusions 6, and align the position of the metal shaft 2 with the position of the two rubber protrusions 6. Then push the toothbrush head 3 to slide it from top to bottom onto the top of the toothbrush handle 1. The metal shaft 2 will then slide into the connecting groove 5. During the installation of the toothbrush head 3, the two rollers 15 gradually slide into the mounting groove 4. The two rollers 15 will be gradually compressed along the arc of the two inclined grooves, which will push the two sliding plates 12 closer to each other and compress the two springs 13, causing the two springs 13 to deform. Until the two rollers 15 slide into the arc groove 8, the two rollers 15 will gradually stretch out and have room to move. Under the influence of the elastic force of the two springs 13, the two rollers 15 will be locked in the arc groove 8.
[0032] Until the top of the sealing ring 17 contacts the inner wall of the top of the mounting groove 4, the toothbrush head 3 will be unable to move further. At this point, the toothbrush head 3 is installed and is firmly locked in the connecting groove 5. The cooperation of the two rolling wheels 15 further increases the firmness of the toothbrush head 3 installation. The sealing ring 7 and sealing ring 17 set between the toothbrush handle 1 and the toothbrush head 3 can improve the sealing of the connection between the toothbrush handle 1 and the toothbrush head 3, and to a greater extent prevent water and toothpaste from seeping in through the gaps.
[0033] Compared with related technologies, the toothbrush head mounting structure of the electric toothbrush provided by this utility model has the following beneficial effects:
[0034] In this invention, the rubber protrusion 6 and the connecting groove 5 work together to facilitate accurate alignment of the toothbrush head 3 and the toothbrush handle 1 and quick installation. At the same time, the rubber protrusion 6 increases the gripping force between the toothbrush head 3 and the metal shaft 2. The strip block 16 and the notch of the metal shaft 2 form a mechanical latch, which can lock the toothbrush head 3 in rotation. The rolling wheel 15 driven by the spring 13 forms a dynamic locking position in the arc groove 8, providing elastic locking for the toothbrush head 3, increasing the firmness of the toothbrush head 3 installation, and also adding external force to reinforce the two sealing rings, preventing the sealing rings from being affected by external forces and improving the waterproof effect.
[0035] It should be noted that the device structure and accompanying drawings of this utility model mainly describe the principle of this utility model. In terms of the technical aspects of this design principle, the setting of the power mechanism, power supply system and control system of the device is not fully described. However, those skilled in the art who understand the principle of the above utility model can clearly understand the specific details of its power mechanism, power supply system and control system.
[0036] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. A toothbrush head mounting structure for an electric toothbrush, comprising a toothbrush handle, characterized in that, A metal shaft is fixedly installed at the top of the toothbrush handle. A toothbrush head is positioned above the toothbrush handle. A mounting groove is formed at the bottom of the toothbrush head. A connecting groove is formed on the inner wall of the top of the mounting groove. Rubber protrusions are fixedly installed on the inner walls of both sides of the connecting groove. Both rubber protrusions are in contact with the metal shaft. A sealing ring is fixedly installed at the bottom of the toothbrush head. The bottom of the sealing ring is in contact with the top of the toothbrush handle. An arc-shaped groove is formed on the inner wall of the mounting groove. An annular block is fixedly installed at the top of the toothbrush handle. Two side grooves are formed on the annular block. Receiving cavities are formed on the inner walls of the top and bottom of the two side grooves. Two sliding plates are slidably installed in the four receiving cavities. Springs are fixedly installed on the inner walls of the two side grooves that are close to each other. The two springs are in contact with the two sliding plates respectively. U-shaped blocks are fixedly installed on the two sliding plates. Rollers are rotatably installed on the two U-shaped blocks. The two rolling wheels are slidably installed in the arc-shaped grooves.
2. The toothbrush head mounting structure of the electric toothbrush according to claim 1, characterized in that, Strip blocks are fixedly installed on both inner walls of the connecting groove, and both strip blocks are adapted to the metal shaft.
3. The toothbrush head mounting structure of the electric toothbrush according to claim 1, characterized in that, A second sealing ring is fixedly installed on the top of the annular block, and the top of the second sealing ring is in contact with the inner wall of the top of the mounting groove.
4. The toothbrush head mounting structure of the electric toothbrush according to claim 1, characterized in that, A docking rod is fixedly installed between the inner walls of the two sides of each of the four receiving cavities, and the four docking rods are slidably connected to the two sliding plates respectively.
5. The toothbrush head mounting structure of the electric toothbrush according to claim 1, characterized in that, A circular rod is fixedly installed between the inner walls of the two U-shaped blocks on both sides, and the two rolling wheels are respectively rotatably sleeved on the two circular rods.
6. The toothbrush head mounting structure of the electric toothbrush according to claim 1, characterized in that, The inner wall of the mounting groove has two oblique grooves, and the corresponding oblique grooves are connected to the arc-shaped groove.
7. The toothbrush head mounting structure of the electric toothbrush according to claim 1, characterized in that, The top and bottom of the two sliding plates are each inlaid with a plurality of rolling balls, which are in contact with the inner walls of the four receiving cavities respectively.