A toothbrush head connection structure for an electric toothbrush

Abstract

This application relates to a toothbrush head connection structure for an electric toothbrush, used to form an elastic snap-fit ​​connection between the toothbrush head and the motor shaft, comprising: a fixing member, which is extended outward from the inside of the toothbrush head, and has two symmetrical reserved grooves to form a first elastic part and a second elastic part; a positioning bone, which is disposed inside the toothbrush head and extends to the second elastic part; a stop block, which is disposed inside the toothbrush head and abuts against the first elastic part, and / or, the stop block and the first elastic part have a preset distance; and a limiting block, which is disposed at the open end of the fixing member. The toothbrush head is snapped onto the motor shaft by the fixing member, the positioning bone, the stop block, and the limiting block, thus completing the direct connection between the toothbrush head and the motor shaft, avoiding the use of a decorative ring, reducing the number of parts used, and lowering costs.

Description

Technical Field

[0001] This application belongs to the field of electric toothbrush technology and relates to a toothbrush head connection structure for an electric toothbrush. Background Technology

[0002] The connection structure between the brush head and handle of a traditional electric toothbrush directly affects the product's reliability, user experience, and functional expandability. Currently, the most common connection method on the market is the plug-in type, using a decorative ring as a connector to the brush handle. However, using a decorative ring requires first connecting the ring to the brush head, and then connecting the assembled brush head to the handle. This involves both the production of the decorative ring, incurring manufacturing costs, and the cumbersome assembly process.

[0003] Therefore, how to provide a toothbrush head connection structure for electric toothbrushes that enables quick assembly and disassembly and low maintenance costs has become an urgent technical problem to be solved. Utility Model Content

[0004] To overcome the problems existing in the related technologies, this application aims to provide a toothbrush head connection structure for an electric toothbrush that enables quick disassembly and low maintenance costs.

[0005] This application is achieved through the following technical solution.

[0006] This technical solution provides a toothbrush head connection structure for an electric toothbrush, used to form an elastic snap-fit ​​connection between the toothbrush head and the motor shaft, including:

[0007] A fixing member is formed extending outward from the inside of the toothbrush head, and the fixing member has two symmetrical reserved grooves to form a first elastic part and a second elastic part;

[0008] Positioning bone, which is located inside the toothbrush head and extends to the second elastic part;

[0009] A stop block is disposed inside the toothbrush head and abuts against the first elastic part, and / or, there is a preset distance between the stop block and the first elastic part;

[0010] A limiting block, wherein the limiting block is disposed at the open end of the fixing member;

[0011] When the toothbrush head is engaged with the motor shaft, the stop block is used to limit the insertion depth of the motor shaft, the positioning bone and the first elastic part form a radial engagement with the D-shaped shaft part of the motor shaft, and the limiting block is engaged with the annular groove of the motor shaft.

[0012] This technical solution uses a toothbrush head fixing component, positioning bone, stop block, and limit block to engage with the motor shaft, completing the direct connection between the toothbrush head and the motor shaft. This avoids the use of decorative rings, reduces the number of parts used, reduces assembly steps, and lowers costs.

[0013] The present invention is further configured such that at least one of the first elastic part and the second elastic part is provided with a limiting block, and the number of limiting blocks is at least one.

[0014] The present invention is further configured such that the end of the reserved groove away from the toothbrush head opening is covered with a thin wall, the thin wall being used to limit the maximum range of elastic deformation of the first elastic part and the second elastic part, thereby maintaining the structural stability of the fixing member.

[0015] The present invention is further configured to include a first reinforcing rib and a second reinforcing rib;

[0016] The second reinforcing rib is used to connect the toothbrush head and the second elastic part. The second reinforcing rib is elastic to cooperate with the elastic deformation of the second elastic part.

[0017] The first reinforcing rib is used to connect the toothbrush head and the first elastic part.

[0018] The present invention is further configured such that the first reinforcing rib is a rigid structure used to support the first elastic part.

[0019] The present invention is further configured such that the first reinforcing rib is elastic and is used to cooperate with the first elastic part to undergo elastic deformation.

[0020] The present invention is further configured such that the stop block has a stop surface, the stop surface is a plane, and / or the stop surface corresponds to the structure of the D-shaped shaft portion to form a stop fit.

[0021] The present invention is further configured such that there are two positioning bones, which are symmetrically arranged about the second elastic part and both abut against the abutment surface of the D-shaped shaft part.

[0022] The present invention is further configured such that the fixing member is an annular column structure, and the fixing member is integrally formed with the toothbrush head.

[0023] The present invention is further configured such that the limiting block corresponds to the annular groove structure, and the limiting block and the positioning bone have a preset distance in the axial direction.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0025] The above and other objects, features and advantages of this application will become more apparent from the more detailed description of exemplary embodiments thereof in conjunction with the accompanying drawings, wherein the same reference numerals generally represent the same components in the exemplary embodiments thereof.

[0026] Figure 1 This is a schematic diagram of the structure shown in one embodiment of this application;

[0027] Figure 2 This is a cross-sectional view shown in one embodiment of this application;

[0028] Figure 3 This is a connection diagram shown in one embodiment of this application;

[0029] Figure 4 This is a schematic diagram of a toothbrush head connection structure shown in one embodiment of this application;

[0030] Figure 5 This is a cross-sectional view of a toothbrush head shown in one embodiment of this application.

[0031] Reference numerals: 1. Toothbrush head; 2. Motor shaft; 21. D-shaped shaft; 211. Abutment surface; 22. Annular groove; 3. Fixing component; 4. Reserved groove; 41. Thin wall; 5. First elastic part; 51. Second elastic part; 6. First reinforcing rib; 7. Second reinforcing rib; 8. Positioning bone; 81. Stop block; 811. Stop surface; 9. Limiting block. Detailed Implementation

[0032] The technical solutions of some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0033] The technical solutions of the embodiments of this application are described in detail below with reference to the accompanying drawings.

[0034] This embodiment discloses a toothbrush head connection structure for an electric toothbrush, used to form an elastic snap-fit ​​connection between the toothbrush head 1 and the motor shaft 2, such as... Figures 1-5 As shown, it includes:

[0035] The fixing member 3 is formed by extending it inside the toothbrush head 1. The fixing member 3 has two symmetrical reserved grooves 4 to form a first elastic part 5 and a second elastic part 51.

[0036] Positioning bone 8 is located inside the toothbrush head 1 and extends to the second elastic part 51;

[0037] A stop block 81 is disposed inside the toothbrush head 1 and abuts against the first elastic part 5, and / or, there is a preset distance between the stop block 81 and the first elastic part 5.

[0038] Limiting block 9 is located at the open end of the fixing member 3;

[0039] When the toothbrush head 1 is engaged with the motor shaft 2, the stop block 81 is used to limit the insertion depth of the motor shaft 2, the positioning bone 8 and the first elastic part 5 form a radial engagement with the D-shaped shaft part 21 of the motor shaft 2, and the limiting block 9 is engaged with the annular groove 22 of the motor shaft 2.

[0040] It should be noted that the fixing part 3, the positioning bone 8, the stop block 81 and the limiting block 9 are integrally formed with the toothbrush head 1. The positioning bone 8 has a contact surface that abuts against the D-shaped shaft part 21, which can limit the circumferential position of the D-shaped shaft part 21. The tail end of the positioning bone 8 is provided with a guide surface that matches the inclined surface of the middle part of the motor shaft 2. By forming a contact fit between the guide surface and the inclined surface, the axial position of the motor shaft 2 can be limited. The limiting block 9 connected to the second elastic part 51 can move radially with the second elastic part 51, thereby allowing the motor shaft 2 to pass through and be locked inside its annular groove 22.

[0041] The first elastic part 5 and the second elastic part 51 formed by the elastically separable fastener 3 can cooperate with the positioning bone 8 to complete the radial engagement of the motor shaft 2. The limiting block 9 can be directly engaged with the annular groove 22 of the motor shaft 2 to limit the axial position of the motor shaft 2, realize the assembly of the toothbrush head 1, and complete the direct connection between the toothbrush head 1 and the motor shaft 2. This avoids the use of decorative rings, reduces the use of parts, reduces assembly steps, and reduces costs.

[0042] like Figure 4 and Figure 5 As shown, at least one of the first elastic part 5 and the second elastic part 51 is provided with a limiting block 9, and the number of limiting blocks 9 is at least one.

[0043] It should be noted that the limiting block 9 engages with the annular groove 22, which can limit the axial position of the motor shaft 2. When it is only provided in the second elastic part 51, it can move with the second elastic part 51 to facilitate the insertion of the motor shaft 2 into the toothbrush head 1, making assembly easier. When it is provided in the first elastic part 5, the first elastic part 5 is more difficult to deform elastically than the second elastic part 51, which makes the limiting block 9 restrict the insertion of the motor shaft 2 and not convenient for the assembly of the toothbrush head 1. However, the structural stability between the toothbrush head 1 and the motor shaft 2 is high after assembly.

[0044] like Figure 4 and Figure 5As shown, the end of the reserved groove 4 away from the opening of the toothbrush head 1 is covered with a thin wall 41. The thin wall 41 is used to limit the maximum range of elastic deformation of the first elastic part 5 and the second elastic part 51, and maintain the structural stability of the fixing member 3.

[0045] It should be noted that by opening the reserved groove, the fastener 3 can be radially separated into the first elastic part 5 and the second elastic part 51. The thin wall 41 can limit the maximum range of elastic deformation of the first elastic part 5 and the second elastic part 51, and maintain the structural stability of the fastener 3.

[0046] like Figure 4 and Figure 5 As shown, it also includes a first reinforcing rib 6 and a second reinforcing rib 7;

[0047] The second reinforcing rib 7 is used to connect the toothbrush head 1 and the second elastic part 51. The second reinforcing rib 7 is elastic to cooperate with the second elastic part 51 to undergo elastic deformation.

[0048] The first reinforcing rib 6 is used to connect the toothbrush head 1 and the first elastic part 5.

[0049] It should be noted that the first reinforcing rib 6 and the second reinforcing rib 7 are used to connect the fastener 3 and the toothbrush head 1, thereby improving the structural stability.

[0050] like Figures 1-5 As shown, the first reinforcing rib 6 is a rigid structure used to support the first elastic part 5.

[0051] like Figures 1-5 As shown, the first reinforcing rib 6 is elastic and is used to cooperate with the first elastic part 5 to undergo elastic deformation.

[0052] like Figure 2 , Figure 4 and Figure 5 As shown, the stop block 81 has a stop surface 811, which is a plane, and / or the stop surface 811 corresponds to the structure of the D-shaped shaft portion 21 to form an abutment fit. It should be noted that the stop block 81 is used to limit the position of the motor shaft 2.

[0053] like Figure 2 , Figure 4 and Figure 5 As shown, there are two positioning bones 8, which are symmetrically arranged about the second elastic part 51 and both abut against the abutment surface 211 of the D-shaped shaft part 21. It should be noted that the positioning bones 8 can restrict the circumferential rotation of the motor shaft 2 and cooperate with the first elastic part 5 to radially limit the motor shaft 2.

[0054] like Figure 4 and Figure 5 As shown, the fixing member 3 is a ring-shaped column structure, and the fixing member 3 is integrally formed with the toothbrush head 1.

[0055] like Figure 4 and Figure 5 As shown, the limiting block 9 corresponds to the annular groove 22 structure, and there is a preset distance between the limiting block 9 and the positioning bone 8 in the axial direction.

[0056] Working principle: The first elastic part 5 and the second elastic part 51 formed by the fixing part 3 can be elastically separated and can be used with the positioning bone 8 to complete the radial engagement of the motor shaft 2. The limiting block 9 is directly engaged with the annular groove 22 of the motor shaft 2, which can limit the axial position of the motor shaft 2. The limiting block 9 limits the insertion depth of the motor shaft 2. The toothbrush head 1 and the motor shaft 2 are directly assembled, avoiding the use of a decorative ring to connect the two, reducing the use of parts, reducing assembly steps, and reducing costs.

[0057] The various embodiments of this application have been described above. These descriptions are exemplary and not exhaustive, nor are they limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or improvement of the technology in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A toothbrush head connection structure of an electric toothbrush for forming a resilient clamping between a toothbrush head (1) and a motor shaft (2), characterized in that, include: The fixing member (3) is formed on the inside of the toothbrush head (1). The fixing member (3) has two symmetrical reserved grooves (4) to form a first elastic part (5) and a second elastic part (51). Positioning bone (8), the positioning bone (8) is disposed inside the toothbrush head (1) and extends to the second elastic part (51); A stop block (81) is provided inside the toothbrush head (1) and abuts against the first elastic part (5), and / or, there is a preset distance between the stop block (81) and the first elastic part (5); Limiting block (9), the limiting block (9) is provided at the open end of the fixing member (3); When the toothbrush head (1) is engaged with the motor shaft (2), the stop block (81) is used to limit the insertion depth of the motor shaft (2), the positioning bone (8) and the first elastic part (5) form a radial engagement of the D-shaped shaft part (21) of the motor shaft (2), and the limiting block (9) is engaged with the annular groove (22) of the motor shaft (2).

2. The brush head connection structure of the electric toothbrush according to claim 1, wherein At least one of the first elastic part (5) and the second elastic part (51) is provided with a limiting block (9), and the number of limiting blocks (9) is at least one.

3. The brush head connection structure of the electric toothbrush according to claim 1, wherein The reserved groove (4) is covered with a thin wall (41) at one end away from the opening of the toothbrush head (1). The thin wall (41) is used to limit the maximum range of elastic deformation of the first elastic part (5) and the second elastic part (51) to maintain the structural stability of the fixing member (3).

4. The brush head connection structure of the electric toothbrush according to claim 1, wherein It also includes a first reinforcing rib (6) and a second reinforcing rib (7); The second reinforcing rib (7) is used to connect the toothbrush head (1) and the second elastic part (51). The second reinforcing rib (7) is elastic to cooperate with the second elastic part (51) to undergo elastic deformation. The first reinforcing rib (6) is used to connect the toothbrush head (1) and the first elastic part (5).

5. The brush head connection structure of the electric toothbrush according to claim 4, wherein The first reinforcing rib (6) is a rigid structure used to support the first elastic part (5).

6. The brush head connection structure of the electric toothbrush according to claim 4, wherein The first reinforcing rib (6) is elastic and is used to cooperate with the first elastic part (5) to undergo elastic deformation.

7. The brush head connection structure of the electric toothbrush according to claim 1, wherein The stop block (81) is provided with a stop surface (811), the stop surface (811) is a plane, and / or the stop surface (811) corresponds to the structure of the D-shaped shaft portion (21) to form a stop fit.

8. The brush head connection structure of the electric toothbrush according to claim 1, wherein Two positioning bones (8) are provided, and the two positioning bones (8) are symmetrically arranged about the second elastic part (51), and both abut against the abutment surface (211) of the D-shaped shaft part (21).

9. The brush head connection structure of the electric toothbrush according to claim 1, wherein The fixing member (3) is a ring-shaped column structure, and the fixing member (3) is integrally formed with the toothbrush head (1).

10. The brush head connection structure of the electric toothbrush according to claim 1, wherein The limiting block (9) corresponds to the annular groove (22) structure, and the limiting block (9) and the positioning bone (8) have a preset distance in the axial direction.

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