A rotating toothbrush head and an electric toothbrush

Abstract

This utility model discloses a rotary toothbrush head and an electric toothbrush, including a drive unit, a brush head, and a housing. The brush head is located on the side of the top of the housing, and the drive unit is located inside the housing and connected to the brush head. The drive unit moves linearly to drive the brush head to rotate. The drive unit includes a connector, a drive rod, and a first elastic member. One end of the first elastic member abuts against the connector, and the other end abuts against the inside of the housing. The brush head includes a brush disc, and the brush disc has a connecting shaft at one end near the drive rod. Through the cooperation of the connector and the first elastic member, the connector maintains contact with the output part on the electric toothbrush handle under the elastic action of the first elastic member. At the same time, when the connector receives the thrust from the output part on the electric toothbrush handle, the elastic force superimposed by the first elastic member can increase the frequency of reciprocating movement of the connector and the force of each movement, allowing the brush disc to output a higher frequency of rotation and a more stable rotational torque.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrushes, and more particularly to a rotary toothbrush head and an electric toothbrush. Background Technology

[0002] Rotary electric toothbrushes clean teeth by driving a brush head that rotates around its center of rotation. This method differs from common vibrating electric toothbrushes.

[0003] For example, the rotary electric toothbrush with application number 2023228374556 uses a meshing method to drive the brush head to rotate through a reciprocating output shaft. This transmission method is inefficient, resulting in a low rotation frequency of the brush disc. Utility Model Content

[0004] This invention provides a rotary toothbrush head and an electric toothbrush, aiming to solve the problem of low efficiency in existing rotary toothbrush head transmission methods.

[0005] According to an embodiment of this application, a rotary toothbrush head is provided, including a drive unit, a brush head, and a housing. The brush head is disposed on the side of the top of the housing and is rotatably connected to the housing. The drive unit is disposed inside the housing and is connected to the brush head. The drive unit moves linearly to drive the brush head to rotate. The drive unit includes a connector, a drive rod, and a first elastic member. One end of the first elastic member abuts against the connector, and the other end abuts against the inside of the housing. One end of the drive rod is fixedly connected to the top of the connector, and the other end is connected to the brush head. The brush head includes a brush disc. The brush disc has a connecting shaft at one end near the drive rod. The connecting shaft is eccentrically positioned and rotatably connected to the drive rod. The housing also has a protruding hook on its inner surface.

[0006] Preferably, the drive rod includes a head block and a rod body, one end of the rod body being fixedly connected to the connector; the head block is located at the end of the rod body away from the connector, and the head block extends laterally in the linear movement direction of the rod body; the head block is sleeved on the connecting shaft, and the head block and the connecting shaft rotate relative to each other.

[0007] Preferably, the rod body and the head block are integrally formed and connected, and both the head block and the rod body are made of metal; the outer periphery of the head block and the rod body is provided with an injection molding layer.

[0008] Preferably, the housing includes an outer cover and a fixing part, a cavity is formed between the end of the connector away from the drive rod and the end of the outer cover, and the fixing part is positioned in the cavity; the hook is disposed on the inner side of the fixing part.

[0009] Preferably, the hook includes a hook rod and a hook head, one end of the hook rod is connected to the fixing part and extends towards the bottom of the fixing part, and the other end of the hook rod is connected to the hook head; the hook rod is elastic; the surface of the hook head has a slope, and the slope is inclined in a direction away from the hook rod.

[0010] Preferably, the brush head further includes a rotating shaft, which is located at the rotation center of the brush disc; the rotating shaft is rotatably connected to the outer casing.

[0011] Preferably, the brush head further includes a limiting rod and a limiting groove. The limiting rod is positioned on the side of the rotating shaft, and the limiting groove is formed at both ends in the moving direction of the limiting rod, and the limiting groove is fixedly connected to the brush disk; the limiting rod moves within the limiting groove.

[0012] This utility model also provides an electric toothbrush, including the rotary toothbrush head described in any of the above claims, and further including a housing, a connector, and a power unit. The power unit is located inside the connector, and the housing is connected to the connector. The power unit contacts the end of the connector away from the drive rod, and the power unit pushes the connector to move linearly.

[0013] Preferably, the power unit includes a motor and a second elastic element, and the connector is a hollow cylindrical structure; the motor moves within the connector, and one end of the motor contacts the bottom of the connector; one end of the second elastic element abuts against the housing, and the other end abuts against the motor.

[0014] Preferably, the connector has a bayonet, and the hook is hooked into the bayonet.

[0015] Compared with the prior art, the rotary toothbrush head and electric toothbrush provided by this utility model have the following beneficial effects: 1. By cooperating with the first elastic element, the connector that drives the brush head to rotate achieves elastic linear movement, ensuring that the connector remains in contact with the output part on the electric toothbrush handle under the elastic action of the first elastic element. Simultaneously, when the connector receives the thrust from the output part of the electric toothbrush handle, the elastic force superimposed by the first elastic element increases the frequency and force of the connector's reciprocating movement, resulting in a higher frequency and more stable rotational torque of the brush plate.

[0016] 2. The offset head block ensures that the connecting shaft is always away from the position of the rod's linear movement, thus ensuring the stability of the connecting shaft's movement.

[0017] 3. By integrally molding the rod body and the head block, and since both the head block and the rod body are made of metal, the strength of the drive rod is improved, making it less prone to deformation. At the same time, forming an injection-molded layer on the outer periphery of the drive rod can reduce rigid collisions between the head block and the connecting shaft, increase the pull-out force of the head block on the connecting shaft, and prevent the head block from accidentally falling out.

[0018] 4. By incorporating a flexible hook and a beveled surface on the hook head, the brush head can be securely held in place during use to prevent it from falling out. When disassembling, the brush head can be pulled out with the help of the beveled surface, making removal easier. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the rotary toothbrush head provided in the first embodiment of this utility model.

[0021] Figure 2 This is a cross-sectional structural diagram of the rotary toothbrush head provided in the first embodiment of this utility model.

[0022] Figure 3 This is a schematic diagram of the connection between the drive unit and the brush head in the rotary toothbrush head provided in the first embodiment of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the fixing part in the rotary toothbrush head provided in the first embodiment of this utility model.

[0024] Figure 5 This is a schematic diagram of the structure of the electric toothbrush provided in the second embodiment of this utility model.

[0025] Figure 6 This is an exploded structural diagram of the electric toothbrush provided in the second embodiment of this utility model.

[0026] Figure 7 This is a cross-sectional structural diagram of the electric toothbrush provided in the second embodiment of this utility model.

[0027] Figure 8 This is a schematic diagram of the motor structure in the electric toothbrush provided in the second embodiment of this utility model.

[0028] Figure 9 This is a cross-sectional structural diagram of the motor in the electric toothbrush provided in the second embodiment of this utility model.

[0029] Label Explanation: 1. Drive unit; 11. Connector; 12. Drive rod; 121. Head block; 122. Rod body; 13. First elastic element; 2. Brush head; 21. Brush disc; 22. Connecting shaft; 23. Rotating shaft; 24. Limiting rod; 25. Limiting groove; 3. Outer shell; 31. Cover section; 32. Fixing section; 100. Hook; 101. Hook rod; 102. Hook head; 103. Inclined surface; 300. Electric toothbrush; 301. Housing; 302. Connector; 3021. Bayonet; 303. Power unit; 3031. Motor; 3032. Second elastic element; 400. Outer casing; 401. Coil; 402. Spring; 403. First magnetic component; 404. First mover; 405. Second magnetic component; 406. Second mover; 407. Third magnetic component; 408. Stator. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0031] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the scope of the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0032] It should also be further understood that the term "and / or" as used in this specification and the appended claims refers to any combination of one or more of the associated listed items and all possible combinations, and includes such combinations.

[0033] Please combine Figure 1 , Figure 2 and Figure 3 The first embodiment of this utility model discloses a rotary toothbrush head, including a drive unit 1, a brush head 2, and a housing 3. The brush head 2 is disposed on the side of the top of the housing 3 and is rotatably connected to the housing 3. The drive unit 1 is disposed inside the housing 3 and is connected to the brush head 2. The drive unit 1 moves linearly to drive the brush head 2 to rotate.

[0034] It is understood that the rotary toothbrush head disclosed in this embodiment is a detachable and replaceable toothbrush head. The outer shell 3 is used to house the drive unit 1 and the brush head 2, and is also used to connect the handle of the electric toothbrush, so that the power output of the handle to the drive unit 1 drives the brush head 2 to rotate.

[0035] The drive unit 1 includes a connector 11, a drive rod 12 and a first elastic member 13. One end of the first elastic member 13 abuts against the connector 11 and the other end abuts against the inside of the outer shell 3. The first elastic member 13 causes the connector 11 to move elastically linearly within the outer shell 3.

[0036] The outer casing 3 is also provided with a protruding hook 100 on its inner surface for fastening and fixing to the corresponding area of ​​the brush handle.

[0037] Please continue to combine Figure 2 and Figure 3 One end of the drive rod 12 is fixedly connected to the top of the connector 11, and the other end is connected to the brush head 2. The drive rod 12 drives the brush head 2 to rotate by reciprocating linear movement.

[0038] It can be understood that the first elastic element 13 is a spring, and the first elastic element 13 is sleeved on the outer periphery of the connector 11. The tail of the connector 11 is provided with a step b (such as...). Figure 3 As shown), the first end of the first elastic member 13 abuts against the step, and the other end abuts against the outer shell 3, so that the connector 11 can move elastically and linearly within the outer shell 3.

[0039] Specifically, the brush head 2 includes a brush disc 21. The brush disc 21 has a connecting shaft 22 and a rotating shaft 23 at one end near the drive rod 12. The rotating shaft 23 is located at the rotation center of the brush disc 21. The connecting shaft 22 is eccentrically arranged. The connecting shaft 22 is rotatably connected to the drive rod 12, and the rotating shaft 23 is rotatably connected to the outer casing.

[0040] It is understood that the brush plate 21 has bristles on one side away from the connecting shaft 22, and the rotation of the brush plate 21 enables the brush bristles to perform a rotating cleaning action on the teeth.

[0041] Please continue to combine Figure 2 and Figure 3 The drive rod 12 includes a head block 121 and a rod body 122, one end of which is fixedly connected to the connector 11. The head block 121 is located at the end of the rod body 122 away from the connector 11, and extends laterally in the linear direction of movement of the rod body 122. The head block 121 is sleeved on the connecting shaft 22, and the head block 121 and the connecting shaft 22 rotate relative to each other.

[0042] It can be understood that the offset head block 121, combined with the eccentric connecting shaft 22, enables the linearly moving rod 122 to rotate the brush disk 21 through the head block 121.

[0043] It is understood that in this embodiment, the rod 122 is aligned with the rotating shaft 23, and the offset head block 121 allows the connecting shaft 22 to always be away from the position of the rod 122 in linear motion, so as to ensure the stability of the movement of the connecting shaft 22.

[0044] It is understood that in this embodiment, the rod 122 and the head block 121 are integrally formed and connected. Both the head block 121 and the rod 122 are made of metal, and a layer of injection molding (not shown) is provided on the outer periphery of the head block 121 and the rod 122. The metal material can be iron, stainless steel, etc. The injection molding layer can reduce the rigid collision between the head block 121 and the connecting shaft 22, increase the pull force of the head block 121 on the connecting shaft 22, and prevent the head block 121 from accidentally falling out.

[0045] Please continue to combine Figure 2 and Figure 4 The outer casing 3 includes an outer cover portion 31 and a fixing portion 32. A cavity a is formed between the end of the connector 11 away from the drive rod 12 and the end position of the outer cover portion 31 (e.g., Figure 2 As shown in region a), the fixing part 32 is positioned inside the cavity a, and the hook 100 is disposed on the inner side of the fixing part 32.

[0046] It is understood that the fixing part 32 can be embedded into the outer cover part 31 by means of a snap-fit. For example, a notch is provided on the side wall of the outer cover part 31, and a corresponding snap-fit ​​is provided on the fixing part 32 at the notch position. When the fixing part 32 is placed into the cavity a, the snap-fit ​​is engaged with the notch to achieve fixation. The cavity a is used to install the fixing part 32, and also to accommodate the connection part of the electric toothbrush handle, that is, to be fixed by the hook 100.

[0047] Specifically, such as Figure 4 As shown, the hook 100 includes a hook rod 101 and a hook head 102. One end of the hook rod 101 is connected to the fixing part 32 and extends towards the bottom of the fixing part 32. The other end of the hook rod is connected to the hook head 102. The hook rod 101 is elastic. The surface of the hook head 102 has a slope 103, which is inclined away from the hook rod 101.

[0048] Please continue to combine Figure 2 and Figure 3The brush head 2 also includes a limiting rod 24 and a limiting groove 25. The limiting rod 24 is positioned on the side of the rotating shaft 23. The limiting groove 25 is formed at both ends of the limiting rod 24 in the moving direction and is fixedly connected to the brush disk 21. The limiting rod 24 moves within the limiting groove 25.

[0049] It is understood that the limiting rod 24 rotates synchronously with the rotating shaft 23, and the rotation angle of the rotating shaft 23 is limited by the two ends of the limiting groove 25, thereby improving the stability of the reciprocating rotation of the brush disk 21.

[0050] Please combine Figure 5 , Figure 6 and Figure 7 The second embodiment of this utility model provides an electric toothbrush 300, which includes the rotary toothbrush head of the first embodiment described above, and further includes a housing 301, a connector 302, and a power unit 303. The power unit 303 is located inside the connector 302, and the housing 301 is connected to the connector 302. The power unit 303 contacts the end of the connector 11 away from the drive rod 12, and the power unit 303 pushes the connector 11 to move linearly. Figure 7 The image shows reciprocating linear motion in the c direction and the opposite direction.

[0051] like Figure 7 As shown, the power unit 303 includes a motor 3031 and a second elastic member 3032. The connecting member 302 is a hollow cylindrical structure. The motor 3031 moves within the connecting member 302. One end of the motor 3031 contacts the bottom of the connector 11, and the linear motion output by the motor 3031 is directly transmitted to the connector 11. One end of the second elastic member 3032 abuts against the housing 301, and the other end abuts against the motor 3031. The second elastic member 3032 is a spring.

[0052] It can be understood that motor 3031 is a linear motor, which can output linear power. Specifically, it uses its internal magnetic field to make the internal mover reciprocate linearly, thereby driving the motor as a whole to form a short-distance reciprocating linear motion.

[0053] Please combine Figure 8 and Figure 9Specifically, motor 3031 is a linear motor, comprising an outer casing 400 and a mover assembly, a stator 408, and a coil 401 disposed within the outer casing 400. The mover assembly is located within the stator 408, and the stator is fixedly connected to the outer casing 400. The coil 401 is wound around the outer periphery of the stator 408. The stator 408 has spring pieces 402 at both ends in the moving direction of the mover assembly. The mover assembly includes a first magnetic element 403, a first mover 404, a second magnetic element 405, a second mover 406, and a third magnetic element 407 stacked sequentially, with the magnetic poles of the first magnetic element 403, the second magnetic element 405, and the third magnetic element 407 arranged symmetrically. The coil 401 has two turns, with the two turns wound in opposite directions and symmetrically arranged with the second magnetic element 405 as the center. The first mover 404 extends through the first magnetic element 403 and is positioned with the upper spring piece 402, and the second mover 406 extends through the third magnetic element 407 and is positioned with the lower spring piece 402.

[0054] It is understandable that the coil 401 is electrically connected to the external power supply equipment through the wire. When the power is on, the moving part will form a reciprocating linear motion based on the magnetic field. Under the action of the spring 402, the outer cover 400 also performs a reciprocating linear motion, which ultimately causes the motor 3031 to form a reciprocating linear motion and output it outward.

[0055] It is understood that in this embodiment, the electric toothbrush 300 is an electric device based on a built-in battery. It is a common technical means to set up a battery in the housing 301 of the electric toothbrush and supply power to the motor 3031 (such as wire connection), so it will not be described in detail here.

[0056] Please continue reading. Figure 4 and Figure 6 The connector 302 has a latch 3021 for engaging the hook 100. Specifically, the hook head 102 of the hook 100 is engaged within the latch 3021. When the user installs the brush head, the hook head 102 slides along the side wall of the connector 302 due to the elasticity of the hook rod 101. When it moves to the position of the latch 3021, it can enter and engage due to the elasticity of the hook rod 101. When the user needs to remove the brush head, they apply force in the opposite direction to pull the brush head out. At this time, the inclined surface 103 of the hook head 102 can guide the latch 3021 to slide out.

[0057] Compared with the prior art, the rotary toothbrush head and electric toothbrush provided by this utility model have the following beneficial effects: 1. By cooperating with the first elastic element, the connector that drives the brush head to rotate achieves elastic linear movement, ensuring that the connector remains in contact with the output part on the electric toothbrush handle under the elastic action of the first elastic element. Simultaneously, when the connector receives the thrust from the output part of the electric toothbrush handle, the elastic force superimposed by the first elastic element increases the frequency and force of the connector's reciprocating movement, resulting in a higher frequency and more stable rotational torque of the brush plate.

[0058] 2. The offset head block ensures that the connecting shaft is always away from the position of the rod's linear movement, thus ensuring the stability of the connecting shaft's movement.

[0059] 3. By integrally molding the rod body and the head block, and since both the head block and the rod body are made of metal, the strength of the drive rod is improved, making it less prone to deformation. At the same time, forming an injection-molded layer on the outer periphery of the drive rod can reduce rigid collisions between the head block and the connecting shaft, increase the pull-out force of the head block on the connecting shaft, and prevent the head block from accidentally falling out.

[0060] 4. By incorporating a flexible hook and a beveled surface on the hook head, the brush head can be securely held in place during use to prevent it from falling out. When disassembling, the brush head can be pulled out with the help of the beveled surface, making removal easier.

[0061] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in this utility model, and these modifications or substitutions should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A rotary toothbrush head, characterized in that: It includes a drive unit, a brush head, and a housing. The brush head is located on the side of the top of the housing and is rotatably connected to the housing. The drive unit is disposed inside the housing and is connected to the brush head. The drive unit moves linearly to drive the brush head to rotate. The drive unit includes a connector, a drive rod, and a first elastic member, one end of which abuts against the connector and the other end of which abuts against the housing. One end of the drive rod is fixedly connected to the top of the connector, and the other end is connected to the brush head; The brush head includes a brush disc, and the brush disc has a connecting shaft at one end near the drive rod. The connecting shaft is eccentrically positioned and rotatably connected to the drive rod. The outer casing also has protruding hooks on its inner surface.

2. The rotary toothbrush head according to claim 1, characterized in that: The drive rod includes a head block and a rod body, with one end of the rod body fixedly connected to the connector. The head block is located at the end of the rod away from the connector, and the head block extends laterally in the straight-line movement direction of the rod. The head block is sleeved on the connecting shaft, and the head block and the connecting shaft rotate relative to each other.

3. The rotary toothbrush head according to claim 2, characterized in that: The rod body and the head block are integrally formed and connected, and both the head block and the rod body are made of metal. The head block and the outer periphery of the rod body are provided with an injection molding layer.

4. The rotary toothbrush head according to claim 1, characterized in that: The housing includes an outer cover and a fixing part. A cavity is formed between the end of the connector away from the drive rod and the end of the outer cover. The fixing part is positioned inside the cavity. The hook is disposed on the inner side of the fixing part.

5. The rotary toothbrush head according to claim 4, characterized in that: The hook includes a hook rod and a hook head. One end of the hook rod is connected to the fixing part and extends towards the bottom of the fixing part. The other end of the hook rod is connected to the hook head. The hook rod is elastic; The hook head surface has a bevel, which is inclined in a direction away from the hook rod.

6. The rotary toothbrush head according to claim 1, characterized in that: The brush head also includes a rotating shaft, which is located at the rotation center of the brush disk; The rotating shaft is rotatably connected to the outer casing.

7. The rotary toothbrush head according to claim 6, characterized in that: The brush head also includes a limiting rod and a limiting groove. The limiting rod is positioned on the side of the rotating shaft, and the limiting groove is formed at both ends of the limiting rod in the direction of movement. The limiting groove is fixedly connected to the brush disk. The limiting rod moves within the limiting groove.

8. An electric toothbrush, comprising the rotary toothbrush head as described in any one of claims 1-7, characterized in that: It also includes a housing, a connector, and a power unit, wherein the power unit is located inside the connector, and the housing is connected to the connector; The power unit contacts the end of the connector that is away from the drive rod, and the power unit pushes the connector to move linearly.

9. The electric toothbrush according to claim 8, characterized in that: The power unit includes a motor and a second elastic element, and the connecting element is a hollow cylindrical structure; The motor moves within the connector, with one end of the motor contacting the bottom of the connector. One end of the second elastic member abuts against the housing, and the other end abuts against the motor.

10. The electric toothbrush according to claim 8, characterized in that: The connector has a bayonet, and the hook is hooked into the bayonet.

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