Roller brush head manufacturing method, roller brush head, electric toothbrush and mold
By combining bristle bundles with a metal shaft to form a roller brush head, the problems of complex and costly production in existing technologies are solved, achieving the effects of simplified production and convenient replacement.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-29
- Publication Date
- 2026-03-13
AI Technical Summary
The manufacturing process for existing electric toothbrush roller brush heads is complex and costly, leading to frequent replacements.
The process involves heating a metal shaft to the melting temperature of the bristles, causing the ends of the bristle bundles to fuse to the outer periphery of the metal shaft to form a plastic matrix, which together form a roller brush head, simplifying the production process and reducing costs.
It simplifies the production process of roller brush heads, reduces production costs, and makes roller brush heads detachable and easy to replace.
Smart Images
Figure CN121647460A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of electric toothbrush technology, and in particular to a method for manufacturing a roller brush head, the roller brush head, the electric toothbrush, and the mold. Background Technology
[0002] As technology permeates all aspects of life, personal daily care has also become more intelligent and efficient. Electric toothbrushes, as a technological iteration of traditional manual toothbrushes, have become widely recommended oral hygiene tools by dental professionals.
[0003] Currently, some electric toothbrushes use roller brush heads, which are consumable parts that need to be replaced regularly. However, the manufacturing process for roller brush heads is relatively complex and costly. Summary of the Invention
[0004] The technical problem to be solved by this application is to provide a method for manufacturing a roller brush head, a roller brush head, an electric toothbrush, and a mold, in order to address the above-mentioned deficiencies of the prior art.
[0005] A method for manufacturing a roller brush head, the method comprising:
[0006] Heat the metal shaft to above the melting temperature of the brush bristles;
[0007] One end of the bristle bundle is brought into contact with a metal shaft, causing the end of the bristle bundle to be heated and melted by the metal shaft. After the end material of the bristle bundle melts, it is fused together to form a plastic matrix covering the outer periphery of the metal shaft. Furthermore, the plastic matrix of the bristle bundle and the metal shaft are combined to form a roller brush head.
[0008] Optionally, the metal shaft is made of stainless steel.
[0009] Optionally, the metal shaft is made of a metal material other than stainless steel; the cross-sectional profile of the metal shaft is non-circular.
[0010] Optionally, the metal shaft may be made of a metal material other than stainless steel;
[0011] The outer peripheral surface of the metal shaft is provided with a recessed structure;
[0012] Alternatively, the outer peripheral surface of the metal shaft may be provided with a protruding structure;
[0013] Alternatively, the outer peripheral surface of the metal shaft may be provided with both recessed and raised structures.
[0014] Optionally, the metal shaft is made of a metal material other than stainless steel; the metal shaft is composed of one or more metal sheets.
[0015] This application also provides a method for manufacturing a roller brush head, the method comprising:
[0016] Heat the metal shaft to above the melting temperature of the brush bristles;
[0017] One end of the bristle bundle is brought into contact with the metal shaft, so that the end of the bristle bundle is heated and melted by the metal shaft; after the end material of the bristle bundle melts, it is fused together to form a plastic matrix covering the outer periphery of the metal shaft.
[0018] The metal shaft is extracted from the plastic matrix; the plastic matrix and the bristle bundles around its outer periphery constitute the roller brush head.
[0019] Optionally, the cross-sectional profile of the metal shaft is non-circular.
[0020] This application also provides a roller brush head, which is manufactured using any of the above-described manufacturing methods.
[0021] This application also provides an electric toothbrush, which includes the roller brush head described above, and the roller brush head is installed in a detachable manner.
[0022] This application also provides a mold for manufacturing the above-mentioned roller brush head;
[0023] A central hole for inserting a metal shaft is formed in the center of the mold; a plurality of mold blocks are arranged circumferentially around the central hole, and a gap space is formed between adjacent mold blocks for extending the bristle bundle into the central hole to contact the metal shaft; a baffle structure is arranged on each side of the mold block along the extension direction of the central hole, and at least one of the baffle structures on both sides is assembled in a detachable manner.
[0024] This application improves the manufacturing process of roller brush heads and provides a new process for producing roller brush heads that is simple and low in cost. Attached Figure Description
[0025] Figure 1 This is one of the flowcharts for the manufacturing method of the roller brush head in the embodiments of this application.
[0026] Figure 2 This is the second flowchart of the method for manufacturing the roller brush head in the embodiments of this application.
[0027] Figure 3 This is a schematic diagram of the structure of the roller brush head in the embodiments of this application.
[0028] Figure 4 This is a schematic diagram of the mold structure in the embodiments of this application.
[0029] Figure 5This is an exploded structural diagram of the mold in the embodiments of this application.
[0030] Figure 6 This is a schematic diagram of the mold used to make the roller brush head in an embodiment of this application.
[0031] Reference numerals: metal shaft 101, bristle bundle 102, mold 200, shaft hole 201, mold block 202, gap space 203, baffle structure 204. Detailed Implementation
[0032] The following are specific embodiments of this application, described in conjunction with the accompanying drawings, to further illustrate the technical solutions of this application. However, this application is not limited to these embodiments. In the following description, specific details such as particular configurations and components are provided merely to aid in a comprehensive understanding of the embodiments of this application. Therefore, those skilled in the art should understand that various changes and modifications can be made to the embodiments described herein without departing from the scope of protection of this application. Furthermore, for clarity and brevity, descriptions of known functions and structures have been omitted.
[0033] It should be noted that, where there is no conflict, the embodiments and features described in this application can be combined with each other.
[0034] Currently, some electric toothbrushes use roller brush heads, which are consumable parts and need to be replaced regularly. However, the manufacturing process for roller brush heads is relatively complex and costly. Therefore, this application improves the manufacturing process of roller brush heads and provides a new, simple, and low-cost process.
[0035] Example 1
[0036] refer to Figure 1 This embodiment provides a method for manufacturing a roller brush head, which includes steps S101 and S102.
[0037] Step S101: Heat the metal shaft to above the brush melting temperature.
[0038] In step S102, one end of the bristle bundle is brought into contact with the metal shaft so that the end of the bristle bundle is heated and melted by the metal shaft; after the end material of the bristle bundle melts, it is fused together to form a plastic matrix covering the outer periphery of the metal shaft, and the plastic matrix of the bristle bundle and the metal shaft are combined together to form a roller brush head.
[0039] In step S101, a heating device is used to heat the metal shaft to above the brush bristle melting temperature. In step S102, when one end of the brush bristle bundle touches the high-temperature metal shaft, the heat emitted by the metal shaft melts the brush bristle bundle. The liquid material produced by the melting of the brush bristle bundle coats the outer periphery of the metal shaft, and finally solidifies and combines with the metal shaft to form a roller brush.
[0040] In use, the metal shaft of the roller brush head is mounted on the electric toothbrush, and the drive mechanism inside the toothbrush rotates the metal shaft. As the drive mechanism rotates the metal shaft, the bristles rotate synchronously to brush the tooth surface. With continued use of the electric toothbrush, the roller brush head needs to be replaced periodically.
[0041] In some alternative embodiments, the metal shaft is made of stainless steel. Since stainless steel has no oxide layer, the plastic matrix formed by the melting and fusing of the bristle end materials can bond to the stainless steel. Therefore, when the metal shaft rotates, it can drive the plastic matrix and the bristle bundle to rotate synchronously. In this embodiment, the metal shaft can be designed in various shapes as needed, and its cross-section can be designed as circular, polygonal, or various irregular shapes.
[0042] In some alternative embodiments, the metal shaft is made of a metal material other than stainless steel; the cross-sectional profile of the metal shaft is non-circular. Because the surface of metal materials other than stainless steel has an oxide layer, the liquid material generated by the melting of the bristles is difficult to reliably bond with the metal material. In this embodiment, designing the cross-sectional profile of the metal shaft as non-circular restricts the relative rotation between the plastic substrate and the metal shaft through physical shape, allowing the metal shaft to drive the plastic substrate and the bristles to rotate synchronously. In this embodiment, the cross-section of the metal shaft can be designed in various non-circular shapes as needed, such as polygons and various irregular shapes.
[0043] In some alternative embodiments, the metal shaft is made of a metal material other than stainless steel, and a recessed structure is provided on the outer peripheral surface of the metal shaft. In this embodiment, by means of the recessed structure, the metal shaft can physically restrict the relative rotation between the plastic substrate and the metal shaft, so that the metal shaft can drive the plastic substrate and the bristle bundle to rotate synchronously.
[0044] In some alternative embodiments, the metal shaft is made of a metal material other than stainless steel, and a raised structure is provided on the outer peripheral surface of the metal shaft. In this embodiment, with the help of the raised structure, the metal shaft can physically restrict the relative rotation between the plastic substrate and the metal shaft, so that the metal shaft can drive the plastic substrate and the bristle bundle to rotate synchronously.
[0045] In some alternative embodiments, the metal shaft is made of a metal material other than stainless steel, and its outer peripheral surface has both recessed and raised structures. In this embodiment, the recessed and raised structures allow the metal shaft to physically restrict relative rotation between the plastic substrate and the metal shaft, enabling the metal shaft to drive the plastic substrate and the bristle bundle to rotate synchronously.
[0046] In some alternative embodiments, the metal shaft is made of a metal material other than stainless steel and is composed of one or more metal sheets. In this embodiment, by means of the shape of the metal sheets, the metal shaft can physically restrict the relative rotation between the plastic substrate and the metal shaft, so that the metal shaft can drive the plastic substrate and the bristle bundle to rotate synchronously.
[0047] In this embodiment, the roller brush head includes a metal shaft with bristles arranged around it. When the electric toothbrush is in operation, the drive device drives the metal shaft to rotate, and the bristles rotate synchronously to brush the tooth surface. With continued use of the electric toothbrush, the roller brush head needs to be replaced periodically.
[0048] Example 2
[0049] refer to Figure 2 This embodiment provides a method for manufacturing a roller brush head, which includes steps S201-S203.
[0050] Step S201: Heat the metal shaft to above the brush melting temperature.
[0051] In step S202, one end of the bristle bundle is brought into contact with the metal shaft so that the end of the bristle bundle is heated and melted by the metal shaft; after the end material of the bristle bundle melts, it is fused together to form a plastic matrix covering the outer periphery of the metal shaft.
[0052] Step S203: The metal shaft is extracted from the plastic substrate; the plastic substrate and the bristle bundles on the outer periphery of the plastic substrate constitute the roller brush head.
[0053] In step S201, a heating device is used to heat the metal shaft to above the bristle melting temperature. In step S202, when one end of the bristle bundle touches the high-temperature metal shaft, the heat emitted by the metal shaft melts the bristle bundle, and the resulting liquid material coats the outer periphery of the metal shaft to form a plastic matrix. In step S203, the metal shaft is extracted from the plastic matrix, and the plastic matrix and the bristle bundles surrounding it constitute a roller brush head. In this embodiment, the metal shaft no longer constitutes part of the roller brush head, but rather acts as a mold for forming the plastic matrix. When the heat emitted by the metal shaft melts the bristle bundle, the resulting liquid material coats the outer periphery of the metal shaft to form a plastic matrix with a shape consistent with the surface of the metal shaft. Finally, the metal shaft is extracted from the plastic matrix, and the plastic matrix and the bristle bundles surrounding it constitute a roller brush head.
[0054] During use, the plastic base of the roller brush head is mounted on the rotating shaft of the electric toothbrush, and the drive unit inside the toothbrush drives the shaft to rotate. When the drive unit rotates the shaft, the plastic base and the bristle bundles rotate synchronously to brush the tooth surface. With continued use of the electric toothbrush, the roller brush head needs to be replaced periodically.
[0055] In some alternative embodiments, the cross-sectional profile of the metal shaft is non-circular. Correspondingly, a non-circular inner hole is formed on the plastic substrate molded from the metal shaft. It should be understood that the electric toothbrush shaft is adapted to the plastic substrate, and when the plastic substrate of the roller brush head is mounted on the electric toothbrush shaft, the non-circular inner hole allows the plastic substrate to generate power with the electric toothbrush shaft.
[0056] In this embodiment, the roller brush head includes a plastic substrate and bristle bundles around the outer periphery of the plastic substrate. When the driving device drives the rotating shaft to rotate, the plastic substrate and bristle bundles rotate synchronously to brush the tooth surface.
[0057] Example 3
[0058] This embodiment provides a roller brush head, which is manufactured using any of the manufacturing methods provided in Embodiment 1 or Embodiment 2.
[0059] One manufacturing method involves heating a metal shaft to above the bristle melting temperature. One end of a bristle bundle is brought into contact with the metal shaft, causing the end of the bristle bundle to melt. The melted material from the bristle bundle fuses together to form a plastic matrix covering the outer periphery of the metal shaft. The plastic matrix of the bristle bundle and the metal shaft are then combined to form a roller brush head. In this embodiment, the roller brush head includes a metal shaft with bristles arranged around it. When the electric toothbrush is in operation, a drive unit drives the metal shaft to rotate, and the bristles rotate synchronously to brush the tooth surface.
[0060] One manufacturing method includes: heating a metal shaft to above the bristle melting temperature; contacting one end of a bristle bundle with the metal shaft, causing the end of the bristle bundle to melt; the melted material of the bristle bundle fuses together to form a plastic matrix covering the outer periphery of the metal shaft; removing the metal shaft from the plastic matrix; the plastic matrix and the bristle bundles surrounding the plastic matrix constitute a roller brush head. In this embodiment, the roller brush head includes a plastic matrix and bristle bundles surrounding the plastic matrix. When a drive device drives the shaft to rotate, the plastic matrix and bristle bundles rotate synchronously to brush the tooth surface.
[0061] The roller brush head provided in this embodiment is manufactured using either the manufacturing method provided in Embodiment 1 or Embodiment 2. For more detailed descriptions, please refer to Embodiment 1 and Embodiment 2.
[0062] Example 4
[0063] This embodiment provides an electric toothbrush, which includes the aforementioned roller brush head, and the roller brush head is detachably installed. The electric toothbrush has a drive device, such as a motor, that can drive the roller brush head to rotate to brush the tooth surface.
[0064] The electric toothbrush provided in this embodiment includes the roller brush head described above. For a more detailed description, please refer to Embodiment 3 of the roller brush head in the previous section, which will not be repeated here.
[0065] Example 5
[0066] This embodiment provides a mold 200, for reference. Figures 3-6 The mold 200 is used to make the roller brush head; a central hole 201 for inserting a metal shaft 101 is formed in the center of the mold 200; a plurality of mold blocks 202 are arranged circumferentially around the central hole 201, and a gap space 203 is formed between adjacent mold blocks 202 for extending the bristle bundle 102 into the central hole 201 and contacting the metal shaft 101; along the extension direction of the central hole 201, a baffle structure 204 is arranged on each side of the mold block 202, and at least one of the baffle structures on both sides is assembled in a detachable manner.
[0067] When manufacturing a roller brush head using mold 200, one manufacturing method includes the following steps: heating a metal shaft to above the bristle melting temperature and inserting it into the shaft hole 201 of mold 200; extending a bristle bundle 102 through the gap space 203 between adjacent mold blocks 202 into the shaft hole 201 to contact the metal shaft 101. The ends of the bristle bundle are heated and melted by the metal shaft, and the melted material of the bristle bundle fuses together to form a plastic matrix covering the outer periphery of the metal shaft. The plastic matrix of the bristle bundle and the metal shaft are combined to form a roller brush head. Finally, the baffle structure 204 is removed to take out the roller brush head.
[0068] When manufacturing a roller brush head using mold 200, one manufacturing method includes the following steps: heating a metal shaft to above the bristle melting temperature and inserting it into the shaft hole 201 of mold 200; extending the bristle bundle 102 through the gap space 203 between adjacent mold blocks 202 into the shaft hole 201 to contact the metal shaft 101. The ends of the bristle bundle are heated and melted by the metal shaft, and the melted material of the bristle bundle fuses together to form a plastic matrix covering the outer periphery of the metal shaft. The metal shaft is then removed from the plastic matrix, and the plastic matrix and the bristle bundles surrounding the plastic matrix constitute the roller brush head. Finally, the baffle structure 204 is removed to take out the roller brush head.
[0069] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.
[0070] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.
[0071] The specific embodiments described herein are merely illustrative examples of the technical solutions of this application. Those skilled in the art to which this application pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, but without departing from the scope defined by the claims of this application.
Claims
1. A method for manufacturing a roller brush head, characterized in that, The method for manufacturing the roller brush head includes: Heat the metal shaft to above the melting temperature of the brush bristles; One end of the bristle bundle is brought into contact with a metal shaft, causing the end of the bristle bundle to be heated and melted by the metal shaft. After the end material of the bristle bundle melts, it is fused together to form a plastic matrix covering the outer periphery of the metal shaft. Furthermore, the plastic matrix of the bristle bundle and the metal shaft are combined to form a roller brush head.
2. The method for manufacturing a roller brush head according to claim 1, characterized in that, The metal shaft is made of stainless steel.
3. The method for manufacturing a roller brush head according to claim 1, characterized in that, The metal shaft is made of a metal material other than stainless steel; the cross-sectional profile of the metal shaft is non-circular.
4. The method for manufacturing a roller brush head according to claim 1, characterized in that, The metal shaft is made of a metal material other than stainless steel; The outer peripheral surface of the metal shaft is provided with a recessed structure; Alternatively, the outer peripheral surface of the metal shaft may be provided with a protruding structure; Alternatively, the outer peripheral surface of the metal shaft may be provided with both recessed and raised structures.
5. The method for manufacturing a roller brush head according to claim 1, characterized in that, The metal shaft is made of a metal material other than stainless steel; the metal shaft is composed of one or more metal sheets.
6. A method for manufacturing a roller brush head, characterized in that, The method for manufacturing the roller brush head includes: Heat the metal shaft to above the melting temperature of the brush bristles; One end of the bristle bundle is brought into contact with the metal shaft, so that the end of the bristle bundle is heated and melted by the metal shaft; after the end material of the bristle bundle melts, it is fused together to form a plastic matrix covering the outer periphery of the metal shaft. The metal shaft is extracted from the plastic matrix; the plastic matrix and the bristle bundles around its outer periphery constitute the roller brush head.
7. The method for manufacturing a roller brush head according to claim 6, characterized in that, The cross-sectional profile of the metal shaft is non-circular.
8. A roller brush head, characterized in that, The roller brush head is manufactured using the manufacturing method described in any one of claims 1-5, or the manufacturing method described in any one of claims 6-7.
9. An electric toothbrush, characterized in that, The electric toothbrush includes a roller brush head as described in claim 8, and the roller brush head is installed in a detachable manner.
10. A mold, characterized in that, The mold is used to manufacture the roller brush head as described in claim 8; A central hole for inserting a metal shaft is formed in the center of the mold; a plurality of mold blocks are arranged circumferentially around the central hole, and a gap space is formed between adjacent mold blocks for extending the bristle bundle into the central hole to contact the metal shaft; a baffle structure is arranged on each side of the mold block along the extension direction of the central hole, and at least one of the baffle structures on both sides is assembled in a detachable manner.