Toothbrush head for electric toothbrush

Abstract

A toothbrush head (1) for an electric toothbrush. The toothbrush head (1) comprises: a brush disc (10), a brush head housing (20), and a swing rod (30) swingably accommodated in the brush head housing (20); the swing rod (30) is engaged with and drives the brush disc (10); an accommodating seat (22) of the brush head housing (20) is provided with a snap member (23), and the snap member (23) is provided on a snap supporting rod (24) protruding from the middle of the accommodating seat (22); a snap guide groove (121) and a snap engagement groove (123) are formed in a mounting block (12) of the brush disc (10), and the snap guide groove (121) is in communication with the snap engagement groove (123); and the snap member (23) can be inserted into the snap guide groove (121) along a rotation axis (A1), and enters the snap engagement groove (123) after rotation. When the swing rod (30) is engaged with the brush disc (10), a part of the swing rod (30) is inserted into the snap guide groove (121), so that the snap member (23) at the accommodating seat (22) is prevented from being disengaged from the snap engagement groove (123) by means of the snap guide groove (121). By means of the toothbrush head (1), reliable rotatable connection between the brush disc (10) and the brush head housing (20) is realized, and the requirements of simple and convenient manufacturing process and low costs are also met.

Description

Toothbrush heads for electric toothbrushes Technical Field

[0001] The present invention relates to the technical field of oral care devices, and in particular to a toothbrush head for an electric toothbrush. Background Art

[0002] An electric toothbrush currently on the market uses a toothbrush head with a rotating brush disc. This type of toothbrush head is connected to the drive shaft of the electric toothbrush body. A rocker arm is provided within the toothbrush head, which is directly connected to the drive shaft. The end of the rocker arm drives the brush disc. The rocker arm is driven by the drive shaft of the electric toothbrush, transmitting the reciprocating rotation of the drive shaft about its axis of rotation to the brush disc, causing the brush disc to reciprocate about its central axis.

[0003] Another toothbrush head on the market features a metal drive shaft connected to a plastic rocker arm that passes through a hollow area in the brush disc. This shaft drives the brush disc while also preventing it from separating from the brush head housing. However, the additional metal drive shaft in this toothbrush head is relatively expensive and labor-intensive to manufacture.

[0004] To reduce the manufacturing cost of brush heads, some toothbrush heads have omitted the metal brush drive shaft and are rotatably connected only by the mating structure of the brush disc and the brush head housing. For example, the bottom surface of the brush disc is fixedly connected to a flange, the outer side of which is provided with a sliding groove. The housing of the toothbrush head is provided with a flange hook. When the brush disc is mated to the housing, the flange hook elastically deforms and snaps into the sliding groove of the flange, forming a swinging fit. However, while reducing costs, this toothbrush head design ignores the issue of brush head safety. The brush disc can easily fall out of the brush head housing. Once the plastic parts become worn and aged after prolonged use, the brush disc can easily fall out of the toothbrush head housing, which is very dangerous for the user during use.

[0005] Therefore, it is desired to have a toothbrush head that can achieve reliable assembly of the brush disc and the brush head housing at a relatively low cost.

[0006] Summary of the Invention

[0007] In order to overcome the shortcomings of the prior art, the present invention provides a toothbrush head for an electric toothbrush, comprising: a brush disc, the brush disc having a brush disc base and a mounting block formed on the lower side of the brush disc base; a brush head shell, the brush head shell forming a cavity, and one end of the brush head shell forming a accommodating seat for receiving the mounting block, the other end of the brush head shell leading to the open end of the cavity, the brush disc being arranged in the accommodating seat and rotating around a rotation axis A1; and a rocker arm, the rocker arm being swingably accommodated in the cavity, the rocker arm engaging and driving the brush disc; wherein the accommodating seat is provided with a buckle, the buckle is arranged on a buckle column protruding from the middle of the accommodating seat, and a buckle guide groove and a buckle engagement groove are formed in the mounting block of the brush disc, the buckle guide groove and the buckle engagement groove are connected, the buckle can be inserted into the buckle guide groove along the rotation axis A1, and enter the buckle engagement groove after rotation, when the rocker arm engages the brush disc, a part of the rocker arm is inserted into the buckle guide groove, preventing the buckle at the accommodating seat from disengaging from the engagement with the buckle engagement groove through the guide groove.

[0008] The upper toothbrush head is inserted through the snap guide groove by means of a buckle, and after rotation, it can be connected together in a reciprocating manner in cooperation with the snap matching groove. The cooperation between the buckle and the buckle engagement groove is locked by the rocker arm, and the buckle is kept received in the buckle engagement groove and will not fall out. Only by removing the rocker arm can the buckle be rotated to the position where the buckle guide groove is aligned, and the buckle can be disengaged from the buckle engagement groove, so that the brush disc can be disengaged from the brush head housing. Therefore, the toothbrush head of the present invention not only realizes a reliable rotatable connection between the brush disc and the brush head housing, but also meets the requirements of simple manufacturing process and low cost.

[0009] According to one aspect of the present invention, the swing arm includes an integrally formed swing arm cam, which is formed on the outer surface of one end of the swing arm adjacent to the receiving seat and is offset to one side of the swing arm's swing axis A2. The brush disc mounting block is formed with a follower recess, which engages with the swing arm cam, causing the swing arm to drive the brush disc to reciprocate about the rotation axis A1. The portion of the swing arm that is inserted into the buckle guide groove is the swing arm cam, and the buckle guide groove includes a portion of the follower recess. As a result, the swing arm cam prevents the buckle from dislodging through the buckle guide groove. The present invention utilizes the swing arm cam to prevent the buckle from dislodging, ensuring a reliable rotational connection.

[0010] According to another aspect of the present invention, the accommodating seat has an annular outer wall and a bottom wall, the buckle pillar protrudes from the bottom wall, the pair of buckles extend from opposite sides of the buckle pillar, and the buckles are spaced a distance from the bottom wall of the accommodating seat.

[0011] According to another aspect of the present invention, the accommodating seat forms a pivot hole below the buckle pillar, the pivot hole extends along a swing line A2 perpendicular to the rotation axis A1, and one end of the swing rod is pivotally connected to the pivot hole.

[0012] According to another aspect of the present invention, the mounting block of the brush plate forms a central hole for inserting the clip pillar, and the clip guide groove includes a portion of the follower recess and a recess radially recessed from the central hole along the relative rotation axis A1, and the paired clips are respectively guided through a portion of the follower recess and the recess into the clip engagement groove.

[0013] According to another aspect of the present invention, when the rocker cam is engaged with the follower recess, the swing of the rocker around the swing axis A2 drives the brush plate to rotate around the rotation axis A1 within a predetermined rotation angle range. Within the predetermined rotation angle range, the buckle is always engaged with the buckle engagement groove.

[0014] According to another aspect of the present invention, the swing arm cam is formed in the shape of a single conical tooth, and the follower recess of the brush plate correspondingly forms a conical tooth groove that receives the conical tooth. When the swing arm cam engages the follower recess, the swing arm cam occupies the portion of the follower recess that serves as the buckle guide groove, thereby preventing the buckle from disengaging from the buckle guide groove. The conical tooth drives the conical tooth groove to move. This shape matching of the cam and the follower recess is optimal. During the rotation of the brush plate, the conical tooth cam occupies the portion of the follower recess that forms the guide groove, preventing the buckle from disengaging.

[0015] According to another aspect of the present invention, the outer diameter of the brush plate base is larger than the outer diameter of the brush plate mounting block, and at least part of the outer surface of the mounting block is rotatably matched with the inner surface of the annular outer wall of the accommodating seat.

[0016] According to another aspect of the present invention, a stop sleeve is further provided in the cavity of the brush head housing. The stop sleeve is inserted into the open end of the cavity of the brush head housing to ensure that the rocker arm does not deviate from the position of the cavity of the brush head housing.

[0017] According to another aspect of the present invention, the brush plate, the rocker arm, and the brush head housing are integrally formed of resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] For a more complete understanding of the present invention, reference may be made to the following description of exemplary embodiments considered in conjunction with the accompanying drawings, in which:

[0019] FIG1 shows a cross-sectional view of a toothbrush head for an electric toothbrush according to a preferred embodiment of the present invention.

[0020] FIG2 shows a perspective view of a brush head housing of a toothbrush head according to a preferred embodiment of the present invention.

[0021] FIG3 shows a perspective view of a brush head housing of a toothbrush head according to a preferred embodiment of the present invention.

[0022] FIG4 shows a perspective view of a brush plate of a toothbrush head according to a preferred embodiment of the present invention.

[0023] FIG5 shows a bottom plan view of the brush plate of a toothbrush head according to a preferred embodiment of the present invention.

[0024] FIG6 shows a cross-sectional view of a brush plate of a toothbrush head according to a preferred embodiment of the present invention.

[0025] Reference Signs: 1 Toothbrush head 10 Brush disc 11 Brush disc base 12 Mounting block 121 Snap guide groove 121′ recess 123 Snap engagement groove 125 Follower recess 126 Center hole 20 Brush head housing 21 Cavity 210 Open end 22 Accommodating seat 23 Snap 24 Snap post 25 Pivot hole 26 Outer wall 27 Bottom wall 30 Rocker 31 Rocker cam 32 End 33 Protrusion 50 Stop sleeve 60 Cleaning element A1 Rotation axis A2 Swing axis DETAILED DESCRIPTION

[0026] The present invention is further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0027] FIG1 illustrates a toothbrush head 1 for an electric toothbrush according to a preferred embodiment of the present invention. The toothbrush head 1 primarily comprises a brush head housing 20, a brush disc 10 mounted at one end of the housing 20, and a swing arm 30 disposed within a cavity 21 of the housing 20. The swing arm 30 is internally configured to accommodate the drive shaft of an electric toothbrush. As the drive shaft reciprocates, the swing arm 30 swings back and forth about a swing axis A2, thereby driving the brush disc 10 to reciprocate about its rotation axis A1 within a predetermined rotation angle range. Cleaning elements 60, such as bristles, are mounted on the brush disc 10. These elements reciprocate with the brush disc 10, thereby cleaning the teeth.

[0028] Figures 2 and 3 respectively show a perspective view and a plan view of the brush head housing 20 of the toothbrush head 1 according to a preferred embodiment of the present invention. A receptacle 22 for receiving the brush disc 10 is formed at one end of the brush head housing 20, with a cavity 21 extending from the receptacle 22. The receptacle 22 has a generally annular outer wall 26 and a bottom wall 27 on one side of the outer wall 26. The other side of the receptacle 22 is open to accommodate the mounting block 12 of the brush disc 10. The shape and size of the cavity 21 are designed to accommodate a rocker arm 30 and allow it to reciprocate about a rocking axis A2. The cavity 21 of the brush head housing 20 communicates with the receptacle 22, allowing the rocker arm 30 to be inserted from the cavity 21 into the receptacle 22. The outer profile of the brush head housing 20 is generally conical, with a relatively small outer diameter near the front end of the receptacle 22 and a relatively large outer diameter at the open end 210.

[0029] FIG1 shows a swing lever 30 disposed within the cavity 21 of the brush head housing 20. A pivot hole 25 is integrally formed in the receptacle 22 of the brush head housing 20. The pivot hole 25 extends substantially perpendicular to the rotation axis A1, and the end of the swing lever 30 is pivotally received within the pivot hole 25. The swing lever 30 also includes a swing lever cam 31 formed near the end of the swing lever 30 received within the pivot hole 25. The swing lever cam 31 is offset to one side of the rotation axis A1; in other words, the swing lever cam 31 is offset relative to the end received within the pivot hole 25.

[0030] The rocker cam 31 is configured to engage with the follower recess 125 on the brush plate 10 and drive its rotation. Preferably, the rocker cam 31 is formed, for example, as a single tapered tooth, while the follower recess 125 on the brush plate 10 correspondingly forms a receiving groove for the tapered tooth. As the rocker 30 reciprocates about the swing axis A2, the brush plate 10 can rotate about the rotation axis A1 within a certain rotation angle range, for example, 40°-60°.

[0031] As shown in Figure 1, the brush tray 10 is connected to the receiving seat 22 of the brush head housing 20 via a snap-fit ​​structure. Specifically, as shown in Figure 2, a snap-fit ​​pillar 24 is protrudingly formed in the middle of the bottom wall 27 of the receiving seat 22 of the brush head housing 20. The top of the snap-fit ​​pillar 24 extends outward to form a snap 23. In a preferred embodiment, a pair of snaps 23 extend radially outward from both sides of the pillar in the shape of a convex piece. The snaps 23 are separated from the inner surface of the bottom wall 27 of the receiving seat 22 by a distance, and the top surface of the snap 23 is preferably flush with or slightly lower than the top surface of the annular outer wall of the receiving seat 22.

[0032] On the other hand, as shown in Figures 5 and 6, the brush plate 10 is formed with a brush plate base 11 and a mounting block 12 disposed on the lower side of the brush plate base 11. The mounting block 12 of the brush plate 10 has a center hole 126 formed in the direction of the rotation axis A1, and the outer diameter of the mounting block 12 is smaller than the outer diameter of the brush plate 10. The outer surface of the mounting block 12 has a diameter and size that matches the inner surface of the outer wall 26 of the accommodating seat 22, and is suitable for rotation within the accommodating seat 22. In order to connect to the buckle 23 provided in the middle of the accommodating seat 22 of the brush head housing 20, the mounting block 12 of the brush plate 10 is formed with a buckle guide groove 121 and a buckle engagement groove 123. The buckle guide groove 121 is farther away from the brush plate base 11 than the buckle engagement groove 123, and the buckle guide groove 121 and the buckle engagement groove 123 are connected. As shown in FIG5 , the buckle guide groove 121 is configured to allow the buckle 23 in the receiving seat 22 to be inserted and guided into the buckle engagement groove 123 and rotated into engagement with the buckle engagement groove 123. In a preferred embodiment, after the buckle 23 is inserted into the buckle guide groove 121, it moves toward the brush plate base 11 and then rotates 90 degrees to enter the buckle engagement groove 123, achieving engagement between the buckle 23 and the buckle engagement groove 123. Conversely, if the brush plate 10 is rotated 90 degrees in the opposite direction, the buckle 23 will align with the buckle guide groove 121, allowing it to pass along the buckle guide groove 121 and be disengaged from the mounting block 12 of the brush plate 10. When the buckle 23 in the accommodating seat 22 engages with the buckle engagement groove 123 of the brush disc 10, the brush disc 10 will not be able to detach from the accommodating seat 22. However, in the direction along the rotation axis A1, the thickness of the buckle 23 is less than the width of the buckle engagement groove 123, so that the buckle 23 fits loosely in the buckle engagement groove 123. Therefore, the brush disc 10 can still rotate back and forth freely relative to the accommodating seat 22.

[0033] In a preferred embodiment, as shown in FIG3 , the latch 23 on the receiving seat 22 extends from the support 24 in a direction perpendicular to the swing axis A2 and the axis A1. A portion of the follower recess 125 serves as a latch guide groove 121, and the follower recess 125 is connected to the latch engagement groove 123. Specifically, in a preferred embodiment, the latch guide groove 121 includes a portion of the follower recess 125 and a recess 121 ′ radially opposite the follower recess 125. As shown in FIG5 , the recess 121 ′ is recessed into the mounting block 12 of the brush disc 10 from the central hole 126 in a direction radially relative to the rotation axis A1. When the clips 23 on the housing 20 are inserted into the clip guide grooves 121 (i.e., the two opposing clips 23 are inserted into the recesses 121' and the follower recesses 125, respectively) and rotated 90 degrees, the clips 23 engage with the clip engagement grooves 123. At this point, the follower recesses 125 and the recesses 121' are aligned along the swing axis A2. At this point, after the swing arm 30 is inserted into the cavity, the swing cam can be inserted into the follower recesses 125. As the brush plate 10 rotates within a predetermined rotational angle range along with the swing arm 30, the clips 23 remain engaged with the clip engagement grooves 123. In particular, because the swing arm 30 occupies the portion of the follower recess 125 that serves as the clip guide groove, the clips 23 cannot escape from the mounting block 12 along the guide grooves 121. Therefore, according to the present invention, the connection between the brush plate 10 and the accommodating seat 22 is highly reliable, avoiding the safety hazard of the brush plate 10 accidentally falling out of the accommodating seat.

[0034] Therefore, in the toothbrush head 1 according to the present invention, a portion of the swing arm 23 will always occupy a portion of the buckle guide groove 121 during the swinging operation, and thus the swing arm 30 serves to lock the engagement between the accommodating seat 22 and the brush disc 10. As described above, the swing arm cam 31 of the swing arm 30 engages with the follower recess 125 on the mounting block 12 of the brush disc 10, and the buckle 23 will always be engaged with the buckle engagement groove 123, and the buckle 23 cannot enter the buckle guide groove 121. Therefore, the engagement between the swing arm cam 31 and the follower recess 125 serves to prevent the accommodating seat 22 from disengaging from the brush disc 10.

[0035] As shown in FIG1 , the lower end of the brush head housing 20 is open, and the swing arm 30 is inserted into the cavity 21 of the brush head housing 20 through the open end 210. Furthermore, a stop sleeve 50 is provided at the open end 210 of the brush head housing 20 and is also inserted into the cavity 21 of the brush head housing 20. A gap exists between the stop sleeve 50 and the swing arm 30 to allow the swing arm 30 to swing within the cavity 21 while preventing the swing arm 30 from disengaging from the cavity 21, thereby ensuring that the swing arm cam 31 does not disengage from the follower recess 125. A snap-fitting tab is provided on the outer surface of the stop sleeve 50, and a snap-fitting hole is provided on the upper surface of the brush head housing 20. After the stop sleeve 50 is inserted into the cavity 21, the snap-fitting tab engages with the snap-fitting hole, maintaining the sleeve 50 in a fixed position relative to the brush head housing 20. It should be understood that the sleeve 50 may also be secured to the brush head housing using other fixed connection structures.

[0036] In addition, as shown in Figure 1, the rocker arm 30 is integrally formed as a cantilever at a position away from the rocker arm cam 31, and a protrusion 33 is provided on the cantilever. A corresponding step portion is formed in the cavity 21 of the brush head shell 20. The cooperation between the protrusion 33 and the step portion provides auxiliary positioning of the rocker arm 30 relative to the cavity 21.

[0037] The following describes the installation method of the toothbrush head 1 according to the present invention. First, align the latch 23 in the receptacle 22 on the brush head housing 20 with the latch guide groove 121 on the mounting block 12 of the brush disc 10. Insert the brush disc 10 into the receptacle 22 along the rotation axis A1. Then, rotate the brush disc 10 90 degrees relative to the receptacle cavity, allowing the latch 23 to enter the latch engagement groove 123 to achieve a snap-on connection. Next, insert the rocker arm 30 from the open end 210 of the cavity 21 of the brush head housing 20, inserting the end 32 of the rocker arm 30 into the pivot hole 25 in the receptacle 22. At this point, the rocker arm cam 31 also engages with the follower recess 125 of the brush disc mounting block 12, while the protrusion 33 on the rocker arm abuts against the step in the cavity 21. Finally, insert the stop sleeve 50 from the open end 210 of the cavity 21, abutting against one end of the post rocker arm 30 to retain the rocker arm 30 in the cavity 21. Thus, the installation of the toothbrush head 1 is completed.

[0038] Preferably, the brush plate 10, the brush head housing 20, the rocker arm 30, and the stop sleeve 50 are all made of plastic, and these components are connected and mounted together by snap-fitting.

[0039] The toothbrush head 1 according to the present invention is reciprocally rotatably connected by engaging the buckle 23 with the buckle engagement groove 123. In the toothbrush head 1 of the present invention, the buckle 23 and the buckle engagement groove 123, respectively, with their surfaces perpendicular to the rotation axis A1, abut against each other. When the opposing surfaces abut against each other, the buckle 23 is retained within the buckle engagement groove 123 and prevents it from dislodging. Only when the buckle 23 rotates to the position where the buckle guide groove 121 is located and the opposing surfaces no longer abut against each other can the buckle 23 disengage from the buckle engagement groove 123, and the brush disc 10 can be removed from the receiving seat 22. Because the rocker arm 30 in the installed toothbrush head 1 is engaged with the brush disc 10, the rocker arm cam 31 occupies the follower recess forming part of the buckle guide groove, preventing the buckle 23 at the receiving seat 22 from passing through the buckle guide groove 121. Therefore, the buckle 23 can be reliably connected to the buckle engagement groove 123. If the rocker arm 30 is not disassembled, the brush disc 10 will not be able to be removed from the brush head housing 20. Therefore, the present invention simultaneously realizes a simple assembly process and a reliable rotatable connection between the brush disc and the brush head housing.

[0040] Although the present invention is disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent variations, and modifications made to the above embodiments in accordance with the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A toothbrush head for an electric toothbrush, comprising: A brush plate, the brush plate having a brush plate base and a mounting block formed on a lower side of the brush plate base; A brush head housing, wherein the brush head housing forms a cavity, and one end of the brush head housing forms a receiving seat for receiving the mounting block, and the other end of the brush head housing leads to the open end of the cavity, and the brush disc is arranged in the receiving seat to rotate around a rotation axis (A1); as well as a swing rod swingably received in the cavity, the swing rod engaging and driving the brush plate; It is characterized in that The receiving seat is provided with a buckle, and the buckle is arranged on a buckle pillar protruding from the middle of the receiving seat. A buckle guide groove and a buckle engagement groove are formed in the mounting block of the brush disc, the buckle guide groove and the buckle engagement groove are connected, the buckle can be inserted into the buckle guide groove along the rotation axis (A1), and enter the buckle engagement groove after rotation, When the swing rod is engaged with the brush plate, a portion of the swing rod is inserted into the buckle guide groove, preventing the buckle at the accommodating seat from being disengaged from the buckle engagement groove through the guide groove.

2. The toothbrush head according to claim 1, characterized in that The swing lever comprises an integrally formed swing lever cam, the swing lever cam being formed on an outer surface of one end of the swing lever adjacent to the accommodation seat and being offset relative to the swing axis A2 of the swing lever; The mounting block of the brush plate is formed with a follower recess, which is engaged with the rocker cam, and the rocker drives the brush plate to reciprocate around the rotation axis (A1). A part of the swing rod is the swing rod cam, the buckle guide groove includes a part of the follower recess, and the swing rod cam prevents the buckle from escaping through the buckle guide groove.

3. The toothbrush head according to claim 2, characterized in that The receiving seat has an annular outer wall and a bottom wall, and the buckle pillar protrudes from the bottom wall. The pair of buckles extend from opposite sides of the buckle pillar, and the buckle protrusions are spaced apart from the bottom wall of the accommodating seat by a distance.

4. The toothbrush head according to claim 3, characterized in that The accommodating seat forms a pivot hole below the buckle pillar, the pivot hole extends along a swing line (A2) perpendicular to the rotation axis (A1), and one end of the swing rod is pivotally connected in the pivot hole.

5. The toothbrush head according to claim 3, characterized in that: The mounting block of the brush plate forms a central hole for inserting the clip support, and the clip guide groove includes a portion of the follower recess and a recess radially recessed from the central hole relative to the rotation axis (A1), and the paired clips are respectively guided through a portion of the follower recess and the recess to enter the clip engagement groove.

6. The toothbrush head according to claim 1 or 5, characterized in that: When the rocker cam is engaged with the follower recess, the swing of the rocker around the swing axis (A2) drives the brush plate to rotate around the rotation axis (A1) within a predetermined rotation angle range, and within the predetermined rotation angle range, the buckle is always engaged with the buckle engagement groove.

7. The toothbrush head according to claim 5, characterized in that The rocker cam is formed in the shape of a single conical tooth, and the follower recess of the brush plate is correspondingly formed into a conical tooth groove for receiving the conical tooth. When the rocker cam engages the follower recess, the rocker cam occupies the portion of the follower recess that serves as the buckle guide groove to prevent the buckle from being disengaged through the buckle guide groove.

8. The toothbrush head according to claim 1, characterized in that The outer diameter of the brush disc base is greater than the outer diameter of the brush disc mounting block. Furthermore, at least a portion of the outer surface of the mounting block is rotationally matched with the inner surface of the annular outer wall of the accommodating seat.

9. The toothbrush head according to claim 1, characterized in that: A stop sleeve is also provided in the cavity of the brush head housing, and the stop sleeve is inserted into the open end of the cavity of the brush head housing.

10. The toothbrush head according to claim 1, characterized in that The brush plate, the swing rod and the brush head shell are respectively formed integrally of resin.

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