Rubber-coated brush head of electric toothbrush
By introducing bristle plates and raised guide positioning structures into the electric toothbrush head, and using ultrasonic welding to fix the cover plate, the problems of brush head displacement and warping during injection molding were solved, improving production yield and product quality.
Patent Information
- Application Number
- CN202423261949.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-30
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2034-12-30
AI Technical Summary
Traditional electric toothbrush heads are prone to displacement, deformation, and warping during the secondary injection molding process, affecting production yield. Furthermore, the soft rubber can easily enter pores, leading to a decline in processing quality.
The brush head adopts an injection-molded bristle plate and a raised guide positioning structure, combined with ultrasonic welding of the cover plate and brush handle. It uses ABS or PP material brush handle and TPU or TPE material brush head, and ensures the stability of the brush head during the injection molding process through hot melt and ultrasonic welding technology.
It improves production yield, prevents brush head misalignment and warping, avoids soft glue entering pores, and enhances product quality and lifespan.
Smart Images
Figure CN223715836U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electric toothbrush technical field, specifically point to a kind of electric toothbrush rubber-coated brush head. BACKGROUND
[0002] Electric toothbrush is a modern oral cleaning tool, compared with traditional manual toothbrush, electric toothbrush has higher cleaning efficiency and more convenient use experience. Its brush head is generally designed smaller, can flexibly clean each part in oral cavity, including inaccessible area, such as posterior dental area and dental crevice. After using for a period of time, bristle can lose cleaning effect because of wear and deformation, because brush head needs to be replaced regularly.
[0003] The rubber-coated brush head used traditionally is generally made of TPE or soft material such as silicone, which is molded by secondary injection molding of injection molding machine, but during secondary rubber-coated injection molding, the brush head is prone to deviation and deformation due to injection pressure, reducing production yield, and the soft glue of secondary injection molding is prone to enter the inside of the hair hole, further affecting processing quality. UTILITY MODEL CONTENT
[0004] I. Technical problems to be solved
[0005] The utility model solves the technical problems of overcoming the above technical difficulties, providing a brush head guiding and positioning device, which can effectively prevent the brush head from deviating and deforming under injection pressure, greatly improve production yield, avoid cover plate warping, displacement deviation and other problems, effectively avoid the risk of soft glue entering the inside of the hair hole, and improve overall product quality.
[0006] II. Technical scheme
[0007] To solve the above technical problems, the utility model provides a technical scheme of an electric toothbrush rubber-coated brush head, which comprises a brush handle and further comprises:
[0008] Brush wire and protrusion; the brush handle is provided with an injection-molded brush wire plate, the brush wire passes through the brush handle hole of the brush handle and is fixedly connected with the brush wire plate, and the protrusion is arranged at the top end of the brush handle;
[0009] Cover plate and brush head; the bottom surface of the cover plate is sunk into the brush head through steps on both sides, and is directly welded on the brush handle, and the brush head wraps one end of the brush handle.
[0010] As an improvement, the distance between the top end of the protrusion and the top end of the brush handle is between 0.5mm and 1.2mm, and the distance from the brush handle hole edge is between 0.5mm and 1.0mm, for guiding and positioning.
[0011] As improvement, the distance of the step sinking into the brush head is between 0.4-0.8mm, and the step is provided with ultrasonic line outside the circumference, for fixing the cover plate on the brush handle 1 through ultrasonic welding.
[0012] As improvement, the brush handle and the brush head are both formed through injection molding machine.
[0013] As improvement, the brush handle and the cover plate are both made of ABS or PP material, the brush wire is made of nylon or PBT material, and the brush head is made of TPU or TPE material.
[0014] As improvement, the brush wire and the brush wire plate are fixed and formed through hot melting.
[0015] Three, beneficial effects
[0016] The utility model has the advantages that compared with prior art:
[0017] 1. The boss can be used for guiding and positioning when the brush head is placed into the soft glue mold, and can effectively prevent the brush head from being deformed due to the injection pressure during secondary encapsulation injection molding, thereby greatly improving the production yield.
[0018] 2. The cover plate is fixed on the brush handle through ultrasonic welding, and the cover plate is prevented from being warped, displaced or offset due to the injection pressure during secondary encapsulation injection molding, thereby effectively avoiding the risk of soft glue entering the inside of the hair hole. BRIEF DESCRIPTION OF DRAWINGS
[0019] Figure 1 is a three-dimensional schematic diagram of the encapsulated brush head of the electric toothbrush Figure 1 .
[0020] Figure 2 is a three-dimensional schematic diagram of the encapsulated brush head of the electric toothbrush Figure 2 .
[0021] Figure 3 is an exploded schematic diagram of the encapsulated brush head of the electric toothbrush Figure 1 .
[0022] Figure 4 is an exploded schematic diagram of the encapsulated brush head of the electric toothbrush Figure 2 .
[0023] Figure 5 is a cover plate structure schematic diagram of the encapsulated brush head of the electric toothbrush.
[0024] Figure 6 is a top view schematic diagram of the encapsulated brush head of the electric toothbrush.
[0025] Figure 7It is a side view schematic diagram of the rubber-coated brush head of the electric toothbrush.
[0026] As shown in the figure: 1, brush handle; 2, brush head; 3, brush wire; 4, protrusion; 5, cover plate; 6, step; 7, ultrasonic line; 8, brush wire plate. DETAILED DESCRIPTION
[0027] In the description of the utility model, it needs to understand that the orientation or position relation indicated by the terms "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or position relation based on the orientation or position relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, unless otherwise specified, the meaning of "multiple" is two or more. In addition, the term "includes" and any variation thereof is intended to cover non-exclusive inclusion.
[0028] The utility model will be further described in detail below in combination with the drawings.
[0029] In combination with the drawings Figure 1 , the drawings Figure 3 and the drawings Figure 4 , a rubber-coated brush head of an electric toothbrush comprises a brush handle 1, further comprising: brush wire 3 and protrusion 4; The brush handle 1 is provided with an injection-molded brush wire plate 8, the brush wire 3 passes through the brush handle hole on the brush handle 1 and is fixedly integrated with the brush wire plate 8, the protrusion 4 is arranged at the top end of the brush handle 1, the brush wire 3 and the brush wire plate 8 are fixedly formed by heat melting, the brush handle (1) is directly injection-molded by an injection molding machine, and the brush wire 3 is implanted into the brush handle hole and fixedly formed by heat melting under the assistance of special hair implanting equipment, the overall structure is simple, and the operation is convenient.
[0030] In combination with the drawings Figure 6 and the drawings Figure 7 , the distance between the top end of the protrusion 4 and the top end of the brush handle 1 is between 0.5mm-1.2mm, and the distance from the brush handle hole edge is between 0.5mm-1.0mm, for guiding and positioning, so that the overall brush head can be guided and positioned when being placed into the soft rubber mold, and the brush head can be effectively prevented from deviating and deforming when being subjected to injection molding pressure during secondary rubber-coated injection molding, thereby greatly improving the production yield.
[0031] In combination with the drawings Figure 4 and the drawingsFigure 5 The cover plate 5 and the brush head 2 are fixed on the brush handle 1 by ultrasonic welding through the step 6 sinking into the brush head 2 and the ultrasonic wire 7 outside the step 6, the distance of the step 6 sinking into the brush head 2 is 0.4-0.8mm, and the cover plate 5 is prevented from being warped, displaced and offset by the injection pressure during the secondary injection molding, and the risk of the soft glue entering the inside of the hair hole is effectively avoided.
[0032] The utility model discloses a toothbrush Figure 2 The brush handle 1 and the cover plate 5 are made of ABS or PP material, and have the characteristics of high strength and high hardness, the brush wire 3 is made of nylon or PBT material, has good toughness and wear resistance, and has a long service life, and the brush head 2 is made of TPU or TPE material, has good elasticity and softness, and can reduce the stimulation and damage to teeth and gums.
[0033] In the specific implementation of the utility model:
[0034] Firstly, the brush handle 1 (hard glue) is injection molded by an injection molding machine, and the brush wire plate 8 is integrally formed in the brush handle 1, then the brush wire 3 is planted into the brush handle hair hole by using special hair planting equipment, and is fixed and formed by heat melting with the brush wire plate 8.
[0035] Then, the cover plate 5 is fixed on the brush handle 1 by ultrasonic welding through the ultrasonic wire 7, and the brush handle is placed into the injection molding machine, and the brush head 2 is formed by secondary injection molding (soft glue) of the injection molding machine, and the whole is injection molded.
[0036] The distance from the top end of the convex 4 to the top end of the brush handle 1 is 0.5mm-1.2mm, and the distance from the brush handle hair hole edge is 0.5mm-1.0mm, which is used for guiding and positioning, the whole brush head can be guided and positioned when being placed into the soft glue mold, and the brush head can be effectively prevented from being deformed and offset when being subjected to the injection pressure during the secondary injection molding, the cover plate 5 is fixed on the brush handle 1 by ultrasonic welding, the cover plate 5 is prevented from being warped, displaced and offset by the injection pressure during the secondary injection molding, and the risk of the soft glue entering the inside of the hair hole is effectively avoided.
[0037] Although the embodiments of the utility model have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the utility model, and the scope of the utility model is defined by the appended claims and their equivalents.
[0038] The above has described the utility model and its implementation mode, which is not restrictive, and the drawings only show one of the implementation modes of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are not creatively designed, which should belong to the protection scope of the utility model.
Claims
1. An encapsulated brush head of an electric toothbrush, comprising a brush handle (1), characterized in that, Also include: Brush wire (3) and convex (4); the brush handle (1) is provided with injection molded integral brush wire plate (8), brush wire (3) passes through the brush handle (1) on the brush handle hole, and is fixed integral with brush wire plate (8), convex (4) is arranged at the top end of brush handle (1); Cover plate (5) and brush head (2); the bottom surface of cover plate (5) is sunk into brush head (2) through step (6) on both sides, and is directly welded on brush handle (1), and brush head (2) wraps one end of brush handle (1).
2. The encapsulated brush head of an electric toothbrush according to claim 1, wherein: The distance from the top end of the convex (4) to the top end of the brush handle (1) is between 0.5mm-1.2mm, and the distance from the brush handle hole margin is between 0.5mm-1.0mm, for guiding and positioning.
3. The encapsulated brush head of an electric toothbrush according to claim 1, wherein: The step (6) is sunk into the brush head (2) and the distance is between 0.4-0.8mm, and the periphery of the step (6) is provided with ultrasonic line (7), for fixing cover plate (5) on brush handle (1) by ultrasonic welding.
4. The encapsulated brush head of an electric toothbrush according to claim 1, wherein: The brush handle (1) and brush head (2) are both injection molded by injection molding machine.
5. The encapsulated brush head of an electric toothbrush according to claim 1, wherein: The brush handle (1) and cover plate (5) are both ABS or PP material, the brush wire (3) is nylon or PBT material, and the brush head (2) is TPU or TPE material.
6. The encapsulated brush head of an electric toothbrush according to claim 1, wherein: The brush wire (3) and brush wire plate (8) are fixed and formed by hot melting.