Electric toothbrush replacement head

Abstract

The utility model discloses an electric toothbrush replacement head, which belongs to the technical field of electric toothbrushes and comprises a tail cover, a motor and a brush head body. The tail cover is provided with a fixing part, a limiting part connected with the fixing part and an inserting part connected with the limiting part, the other end of the inserting part is connected with a tail cover elastic wall, a connecting block is arranged between the tail cover elastic wall and the limiting part, and two grooves are formed in the end, close to the tail cover elastic wall, of the connecting block; a second elastic wall is arranged between the two grooves, a first elastic wall is arranged at the position, on the opposite side of the second elastic wall, of the limiting part, and an inserting groove is formed in the position, on the connecting block, of the inner side of the inserting part; two first limiting strips matched with the grooves are arranged in the brush head body. The replacement head of the electric toothbrush can solve the problems that toothpaste on the head of the toothbrush splashes before tooth brushing and foam splashes during tooth brushing.

Description

Technical Field

[0001] The utility model relates to the technical field of electric toothbrushes, in particular to a replacement head of an electric toothbrush. Background Art

[0002] Traditional manual toothbrushes are difficult to completely remove dental plaque, and improper brushing methods limit the cleaning effect of brushing. With the development of science and technology, toothbrushes are also being updated, from manual toothbrushes to electric toothbrushes, which has become an inevitable trend.

[0003] The original intention of electric toothbrushes was to design and develop for those who are unable to move or lazy. Later, they gradually became popular and anyone can use them. Just turn on the electric toothbrush button to automatically clean your teeth. There are multiple cleaning modes, which is very convenient. Experiments have proved that electric toothbrushes can remove 38% more dental plaque than manual toothbrushes, and the cleaning effect is better.

[0004] A normal electric toothbrush has an interference fit between the brush head and the output shaft. The brush head moves synchronously with the reciprocating vibration of the motor to clean the teeth. However, this type of brush head, that is, an electric toothbrush in normal working mode, can easily cause toothpaste splashing before brushing, and foam splashing after the brush head of the electric toothbrush is extended out of the mouth after foam is generated during brushing, resulting in a poor user experience. Utility Model Content

[0005] The utility model aims to provide a replacement head for an electric toothbrush, which can solve the problems of toothpaste splashing on the toothbrush head before brushing teeth and foam splashing during brushing teeth.

[0006] To achieve the above-mentioned purpose, the utility model provides an electric toothbrush replacement head, including a tail cover, a motor and a brush head body;

[0007] The tail cover is provided with a fixing portion, a limiting portion connected to the fixing portion, and a plug-in portion connected to the limiting portion, the other end of the plug-in portion is connected to the tail cover elastic wall, a connecting block is provided between the tail cover elastic wall and the limiting portion, two grooves are provided at one end of the connecting block close to the tail cover elastic wall, a second elastic wall is provided between the two grooves, a first elastic wall is provided on the limiting portion on the opposite side of the second elastic wall, and a plug-in groove is provided on the connecting block on the inner side of the plug-in portion;

[0008] Two first limiting strips matching the grooves are arranged inside the brush head body.

[0009] Preferably, the limiting portion comprises a first limiting ring and a second limiting ring arranged on the upper side of the first limiting ring, and bumps are evenly arranged on the circumference of the second limiting ring.

[0010] Preferably, elastic protrusions are arranged on the inner sides of the first elastic wall and the second elastic wall.

[0011] Preferably, a metal spring is provided on the elastic wall of the tail cover.

[0012] Preferably, the diameter of the fixing portion is larger than the diameter of the first limiting ring, and the diameter of the first limiting ring is larger than the diameter of the second limiting ring.

[0013] Preferably, two second limiting strips are arranged above the first limiting strip inside the brush head body, and the two second limiting strips are symmetrically arranged.

[0014] Preferably, a third limiting strip is provided inside the brush head body in the middle of the two second limiting strips, and the third limiting strip is located on the opposite side of the first limiting strip.

[0015] Preferably, a motor output shaft is provided at the output end of the motor.

[0016] Preferably, a buckle point is provided on the motor output shaft.

[0017] Preferably, a clamping block is provided on the second limiting ring at the opposite side of the first elastic wall, and the clamping block corresponds to the buckle point.

[0018] Therefore, the utility model adopts the above-mentioned electric toothbrush replacement head, and its technical effects are as follows:

[0019] (1) The first elastic wall and the second elastic wall are provided, which have a longer lifespan than pure plastic replacement brush heads, and have elastic compensation to fill the gaps in structural wear, so that the user will not experience the bad experience of loud noise due to the end of lifespan;

[0020] (2) The utility model can also set a metal spring on the elastic wall of the tail cover, and use the continuous elastic force of the metal spring to press the motor output shaft, thereby eliminating the high-frequency torque of the motor output shaft, causing the tail cover and the brush head to be driven by inertia to open and close the working mating surfaces to form a gap, thereby absorbing excess noise and making the user experience more comfortable;

[0021] When fully charged, the toothbrush head vibrates with a large amplitude, and the metal shrapnel can absorb excess or redundant energy by slowing down the vibration, which will not cause tingling in the gums and prevent toothpaste from splashing. After the toothbrush is taken out of the mouth, the generated foam will not splash, making the user's brushing experience more comfortable.

[0022] The technical solution of the utility model is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of an electric toothbrush replacement head of the utility model;

[0024] Figure 2 This is a schematic diagram of the tail cover structure of an electric toothbrush replacement head according to the utility model;

[0025] Figure 3 It is a structural schematic diagram of another perspective of the tail cover structure of the electric toothbrush replacement head of the utility model;

[0026] Figure 4 This is a schematic diagram of the motor structure of an electric toothbrush replacement head of the utility model;

[0027] Figure 5 The utility model is a top view of a brush head body of an electric toothbrush replacement head.

[0028] Reference numerals

[0029] 1. Tail cover; 11. Fixing part; 12. Limiting part; 121. First limiting ring; 122. Second limiting ring; 123. Protrusion; 13. Inserting part; 14. Tail cover elastic wall; 15. Connecting block; 16. First elastic wall; 17. Second elastic wall; 18. Block;

[0030] 2. Motor; 201. Motor output shaft; 202. Buckle point;

[0031] 3. Brush head body; 301. First limiting strip; 302. Second limiting strip; 303. Third limiting strip. DETAILED DESCRIPTION

[0032] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0033] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] Embodiment 1

[0035] like Figure 1 As shown, a schematic structural diagram of an electric toothbrush replacement head of the utility model comprises a tail cover 1, a motor 2 and a brush head body 3.

[0036] like Figure 4 The motor 2 is provided with a motor output shaft 201 at the output end thereof; a buckle point 202 is provided on the motor output shaft 201;

[0037] like Figure 2 The tail cover 1 comprises a fixing portion 11 , a limiting portion 12 connected to the fixing portion 11 , and a plug-in portion 13 connected to the limiting portion 12 .

[0038] The limiting part 12 includes a first limiting ring 121 and a second limiting ring 122 disposed on the upper side of the first limiting ring 121. The circumference of the second limiting ring 122 is evenly provided with protrusions 123. In this embodiment, four protrusions 123 are provided. When the tail cover 1 is inserted into the brush head body 3, the first limiting ring 121 and the protrusions 123 are pressed against the inside of the brush head body 3, generating greater friction force and playing a fixing role.

[0039] The diameter of the fixing part 11 is larger than the diameter of the first limiting ring 121, and the diameter of the first limiting ring 121 is larger than the diameter of the second limiting ring 122. The diameter of each component matches the inner diameter of the brush head body 3.

[0040] The plug-in portion 13 includes a first elastic wall 16, a second elastic wall 17 and a connecting block 15. The other end of the plug-in portion 13 is connected to the tail cover elastic wall 14, and the connecting block 15 is arranged between the tail cover elastic wall 14 and the limiting portion 12. The connecting block 15 is provided with two grooves at one end close to the tail cover elastic wall 14, and the second elastic wall 17 is arranged between the two grooves. The first elastic wall 16 is arranged on the limiting portion 12 on the opposite side of the second elastic wall 17, and a plug-in groove is arranged on the connecting block inside the plug-in portion 13.

[0041] The motor output shaft 201 is placed in the socket.

[0042] The first elastic wall 16 and the second elastic wall 17 are arranged opposite to each other, and elastic convex points are arranged on the first elastic wall 16 and the second elastic wall 17. When the motor output shaft 201 is inserted into the tail cover 1, the elastic convex points will pre-press the motor output shaft 201, and when the motor output shaft 201 is inserted, elastic deformation will occur, thereby achieving the purpose of fastening the output shaft. After the tail cover 1 is inserted into the brush head body 3, the first elastic wall 16 and the second elastic wall 17 are squeezed by the inner wall of the brush head body 3, and will further squeeze the motor output shaft 201, thereby achieving the purpose of secondary fastening of the output shaft.

[0043] like Figure 3, which is a schematic diagram of the structure of the tail cover from another perspective. A block 18 is provided on the second limiting ring 122 on the opposite side of the first elastic wall 16. The block 18 matches the buckle position 202 on the motor output shaft 201. When the motor 2 is inserted into the plug-in slot, the motor 2 presses the block 18 outward. When the motor 2 reaches the specified position, the block 18 falls into the buckle position 202 to ensure the stability of the plug-in.

[0044] like Figure 5 The figure shows a top view of the brush head body. Two first limit strips 301 matching the grooves are arranged inside the brush head body 3. When the tail cover 1 is inserted into the brush head body 3, the two grooves on the tail cover 1 are inserted inward along the two first limit strips 301. At this time, the first limit strips 301 play a guiding role for the tail cover 1. When the tail cover 1 is fully inserted into the brush head body 3, the first limit strip 301 can prevent the tail cover 1 from rotating. At this time, the first limit strip 301 plays a limiting role for the tail cover 1.

[0045] Two second limit bars 302 are arranged above the first limit bar 301 inside the brush head body 3, and the two second limit bars 302 are arranged symmetrically. The distance between the two second limit bars 302 matches the width of the motor output shaft 201. After the motor output shaft 201 is inserted, the motor output shaft 201 is squeezed inward to fix the motor output shaft 201, thereby preventing the motor output shaft 201 from rotating during operation.

[0046] A third limiting strip 303 is provided in the middle of the two second limiting strips 302 inside the brush head body 3, and the third limiting strip 303 is located on the opposite side of the first limiting strip 301. When the motor output shaft 201 is inserted, the third limiting strip 303 at the end close to the tail cover 1 will support the top of the motor output shaft 201, thereby limiting the motor output shaft 201 in the longitudinal direction of the brush head body 3.

[0047] The first limiting strip 301 , the second limiting strip 302 , and the third limiting strip 303 cooperate with each other to fix the tail cover 1 and the motor output shaft 201 .

[0048] On the basis of the above, the tail cover elastic wall 14 can also be provided with a metal spring, which embraces the tail cover elastic wall 14, and through the elastic structure of the metal spring itself and the tail cover elastic wall 14 stacked together, a fit force is achieved to the motor output shaft 201. When the tail cover 1 is installed in the brush head body 3, the metal spring and the brush head form a combined force to embrace the motor output shaft 201, achieving the purpose of force transmission and tightening the motor output shaft 201.

[0049] The metal spring holds the elastic wall 14 of the tail cover to increase the strength and durability of the elastic deformation.

[0050] Therefore, the utility model adopts the above-mentioned electric toothbrush replacement head, and is provided with a metal spring sheet. The continuous elastic force of the metal spring sheet is used to press the motor output shaft, thereby eliminating the high-frequency torque of the motor output shaft, causing the tail cover and the brush head to be driven by inertia to open and close the working mating surfaces to form a gap, thereby absorbing excess noise and making the user experience more comfortable; when fully charged, the toothbrush head vibrates with a large amplitude, and the metal spring sheet can absorb excess or redundant energy with slow vibration, will not cause a tingling sensation in the gums, prevent toothpaste from splashing, and will not cause the generated foam to splash after the toothbrush is taken out of the mouth, making the brushing experience more comfortable; the first elastic wall and the second elastic wall are provided, which have a longer lifespan than pure plastic replacement brush heads, and have elastic compensation to fill the gaps in the structural wear, and will not cause the unpleasant experience of loud noise due to the approaching end of life.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. An electric toothbrush replacement head, characterized in that: Including tail cover, motor and brush head body; The tail cover is provided with a fixing portion, a limiting portion connected to the fixing portion, and a plug-in portion connected to the limiting portion, the other end of the plug-in portion is connected to the tail cover elastic wall, a connecting block is provided between the tail cover elastic wall and the limiting portion, two grooves are provided at one end of the connecting block close to the tail cover elastic wall, a second elastic wall is provided between the two grooves, a first elastic wall is provided on the limiting portion on the opposite side of the second elastic wall, and a plug-in groove is provided on the connecting block on the inner side of the plug-in portion; Two first limiting strips matching the grooves are arranged inside the brush head body.

2. The electric toothbrush replacement head according to claim 1, characterized in that: The limiting portion includes a first limiting ring and a second limiting ring arranged on the upper side of the first limiting ring, and bumps are evenly arranged on the circumference of the second limiting ring.

3. The electric toothbrush replacement head according to claim 2, characterized in that: Elastic protrusions are arranged on the inner sides of the first elastic wall and the second elastic wall.

4. The electric toothbrush replacement head according to claim 3, characterized in that: A metal spring is arranged on the elastic wall of the tail cover.

5. The electric toothbrush replacement head according to claim 4, characterized in that: The diameter of the fixing portion is larger than the diameter of the first limiting ring, and the diameter of the first limiting ring is larger than the diameter of the second limiting ring.

6. The electric toothbrush replacement head according to claim 5, characterized in that: Two second limiting strips are arranged above the first limiting strip inside the brush head body, and the two second limiting strips are arranged symmetrically.

7. The electric toothbrush replacement head according to claim 6, characterized in that: A third limiting strip is arranged in the middle of the two second limiting strips inside the brush head body, and the third limiting strip is located on the opposite side of the first limiting strip.

8. The electric toothbrush replacement head according to claim 7, characterized in that: The output end of the motor is provided with a motor output shaft.

9. The electric toothbrush replacement head according to claim 8, characterized in that: A buckle point is arranged on the motor output shaft.

10. The electric toothbrush replacement head according to claim 9, characterized in that: A clamping block is arranged on the second limiting ring at the opposite side of the first elastic wall, and the clamping block corresponds to the buckling point.

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