Toothbrush connection structure, brush head structure and electric toothbrush

Abstract

The present invention discloses a toothbrush connection structure, a brush head structure, and an electric toothbrush, each comprising a main body, a first fixing member disposed on the main body, and a second fixing member disposed on the main body. The first fixing member is detachably connected to the brush head, and the second fixing member is used to connect to the brush handle. In this embodiment, the main body and the brush head are detachably connected together via the first fixing member, and the brush handle is connected to the main body via the fixing member. Furthermore, the brush head and the brush handle are connected together via the connection structure of this embodiment. Since the connection structure is independent of the brush head and the brush handle, the connection structure does not need to be replaced when the brush head is replaced, thereby saving costs. Moreover, during the production of the brush head, the structure of the brush head is simplified, the number of steps is reduced, and production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electric toothbrushes, and in particular to a toothbrush connection structure, a brush head structure and an electric toothbrush. Background Art

[0002] With the improvement of living standards, electric toothbrushes have gradually replaced traditional toothbrushes and become the mainstream toothbrushing tool for the public.

[0003] An electric toothbrush mainly includes a brush head and a toothbrush handle connected to the brush head. Usually, when the brush head is produced, a connecting structure connected to the brush handle is set inside the brush head and cannot be removed from the brush head. The brush head is fixed to the brush handle through the connecting structure. However, since the brush head is a component that is replaced regularly, when the brush head is replaced, the connecting structure inside the brush head also needs to be replaced at the same time, which wastes material costs. In addition, since the production process is complicated when the connecting structure is set inside the brush head, the production efficiency is low. Summary of the Invention

[0004] In view of the above problems, the present invention provides a toothbrush connection structure, a brush head structure and an electric toothbrush, which can save production costs and improve production efficiency.

[0005] According to a first aspect of the present invention, a toothbrush connection structure is provided, comprising a main body, a first fixing member arranged on the main body, and a second fixing member arranged on the main body, wherein the main body is detachably connected to the brush head via the first fixing member, and the main body is detachably connected to the brush handle via the second fixing member.

[0006] The first fixing member includes a connecting shaft. A fixing hole for fixing the connecting shaft is opened on the main body, and one end of the connecting shaft is fixedly installed in the fixing hole.

[0007] The connecting shaft is a metal shaft.

[0008] The main body is made of insulating material. An isolating portion is provided on the main body. The isolating portion is made of insulating material. The isolating portion is located at the end of the fixing hole close to the second fixing member to separate the metal shaft from the motor shaft on the brush handle.

[0009] The metal shaft is integrally formed with the main body.

[0010] The first fixing member is provided with a limiting portion for limiting the brush head from falling out.

[0011] The second fixing member is integrally formed with the main body, and a mounting hole for mounting the motor shaft is provided on the second fixing member.

[0012] A counterweight groove is provided on the main body, and the counterweight groove is used for placing a counterweight block.

[0013] According to a second aspect of the present invention, a brush head structure is provided, characterized in that it comprises a brush head and a toothbrush connecting structure as described in any of the above embodiments, wherein the brush head is detachably connected to the toothbrush connecting structure.

[0014] The first fixing member includes a connecting shaft, a fixing hole for fixing the connecting shaft is opened on the main body, one end of the connecting shaft is fixedly installed in the fixing hole, and the brush head has an axial hole for installing the connecting shaft, and the other end of the connecting shaft is fixedly installed in the axial hole.

[0015] The first fixing member is provided with a card slot or a card engaging portion, and the inner wall of the shaft hole is provided with a card engaging portion or a card slot, and the card slot is card-engaged with the card engaging portion.

[0016] According to a third aspect of the present invention, an electric toothbrush is provided, comprising a brush head, a brush handle, and a toothbrush connecting structure as described in any of the above embodiments, wherein the toothbrush connecting structure is detachably connected to the brush head, and the toothbrush connecting structure is detachably connected to the brush handle.

[0017] The second fixing member is provided with a mounting hole for mounting the motor shaft, the main body is provided with a first through hole, the first through hole passes through the mounting hole, the motor shaft is provided with a second through hole corresponding to the position of the first through hole, and the first through hole and the second through hole are connected by a fastener.

[0018] Implementing the embodiments of the present invention will have at least the following beneficial effects:

[0019] In this embodiment, the main body and the brush head are detachably connected together by a first fixing member, and the brush handle and the main body are connected together by a second fixing member. Furthermore, the brush head and the brush handle are connected together by the toothbrush connecting structure in this embodiment. Since the toothbrush connecting structure is independent of the brush head and the brush handle, there is no need to replace the toothbrush connecting structure when replacing the brush head, which saves costs. Moreover, when manufacturing the brush head, the structure of the brush head is simplified, the process is reduced, and the production efficiency is higher. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] in:

[0022] Figure 1 Schematic diagram of the exploded structure of an electric toothbrush in one embodiment;

[0023] Figure 2 is a schematic diagram of a partial structure of an electric toothbrush in one embodiment;

[0024] Figure 3 for Figure 2 Schematic diagram of the decomposition structure;

[0025] Figure 4 for Figure 2 Schematic diagram of the cutting structure;

[0026] Figure 5 Schematic diagram of the overall structure of a toothbrush connection structure in one embodiment;

[0027] Figure 6 for Figure 5 Schematic diagram of the cutting structure;

[0028] In the figure: 100, toothbrush connection structure; 110, main body; 111, isolation part; 112, first through hole; 1121, avoidance groove; 113, fastener; 114, fixing hole; 121, connecting shaft; 122, clamping groove; 130, second fixing part; 131, mounting hole; 140, counterweight groove; 141, counterweight block; 200, brush head; 210, shaft hole; 220, elastic rod; 221, clamping part; 300, brush handle; 310, motor shaft; 311, second through hole. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] In the description of the embodiments of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the embodiments of the present invention.

[0031] Reference Figures 1-6The electric toothbrush in this embodiment includes a brush head 200, a brush handle 300 and a toothbrush connecting structure 100 for connecting the brush head 200 and the brush handle 300. The brush head 200 is detachably connected to the toothbrush connecting structure 100, and the brush handle 300 is detachably connected to the toothbrush connecting structure 100. The brush head 200 has bristles for brushing teeth, and a motor for driving the brush head 200 to vibrate is installed in the brush handle 300. The toothbrush connecting structure 100 includes a main body 110 and a first fixing member and a second fixing member 130 provided on the main body 110. The second fixing member 130 and the brush handle 300 are detachably connected. Detachable connection, the first fixing part is used to connect the brush head 200, the first fixing part and the brush head 200 are detachably connected, and the brush head 200 and the brush handle 300 are connected together through the connection structure in this embodiment. Since the toothbrush connection structure 100 is independent of the brush head 200 and the brush handle 300, when replacing the brush head 200, there is no need to replace the toothbrush connection structure 100, which saves the material of the toothbrush connection structure 100 and saves costs. Moreover, when manufacturing the brush head 200, due to the simplification of the structure of the brush head 200, the production process of the brush head 200 is reduced accordingly, thereby greatly improving the production efficiency of the brush head 200.

[0032] Reference Figure 4 、 Figure 5 as well as Figure 6 In this embodiment, the first fixing member includes a connecting shaft 121, and the main body 110 has a fixing hole 114 for installing the connecting shaft 121. One end of the connecting shaft 121 is fixedly installed in the fixing hole 114. Preferably, the connecting shaft 121 and the main body 110 are integrally formed to improve production efficiency and product strength. Of course, in other embodiments, the connecting shaft 121 can also be installed in the fixing hole 114 by interference fit, or limited by a limit block to prevent the connecting shaft 121 from escaping from the fixing hole 114; the brush head 200 is provided with an axial hole 210 for installing the connecting shaft 121, and the other end of the connecting shaft 121 is installed in the axial hole 210. Preferably, the fitting tolerance of the connecting shaft 121 and the axial hole 210 is 0 to better transmit the force on the connecting shaft 121 to the brush head 200.

[0033] Specifically, when the connecting shaft 121 and the main body 110 are not integrally formed, in some embodiments, a first pin hole is provided on the main body 110 and passes vertically through the fixing hole 114, and a second pin hole is provided on the connecting shaft 121 at a position corresponding to the pin hole. When the connecting shaft 121 is installed in the fixing hole 114, the positions of the first pin hole and the second pin hole correspond to each other, and the connecting shaft 121 and the main body 110 are fixedly connected together by installing pins in the first pin hole and the second pin hole.

[0034] Specifically, when the connecting shaft 121 and the main body 110 are not integrally formed, in some other embodiments, the main body 110 includes a first main body and a second main body that are symmetrical to each other, the first main body has a fixing column, the second main body has a fixing groove that cooperates with the fixing column, the first main body and the second main body are detachably connected together through the fixing column and the fixing groove, the fixing hole 114 consists of a first fixing hole and a second fixing hole, the first fixing hole is formed on the first main body, and the second fixing hole is formed on the second main body. When the first main body and the second main body are fixed together, the first fixing hole and the second fixing hole are combined to form a fixing hole. Hole 114, the inner wall of the fixing hole 114 extends toward its center to form a limiting protrusion, and the connecting shaft 121 has a limiting groove that cooperates with the limiting protrusion. When the connecting shaft 121 is installed in the fixing hole 114, the limiting protrusion is engaged with the limiting groove, thereby preventing the connecting shaft 121 from falling out of the main body 110, and the fixation is more stable. During installation, the first main body and the second main body are separated, and the connecting shaft 121 is installed on the first main body or the second main body, and then the first main body and the second main body are connected together. Through the above installation method, the connecting shaft 121 can be conveniently installed on the main body 110.

[0035] It should be noted that when the connecting shaft 121 and the main body 110 are integrally formed, the connecting shaft 121 and the main body 110 may also be provided with a limiting protrusion and a limiting groove structure to prevent the connecting shaft 121 from being separated from the main body 110 .

[0036] Reference Figure 4 In this embodiment, the first fixing member has a limiting portion for limiting the escape of the brush head 200. Preferably, the limiting portion and the main body 110 are integrally formed. Further preferably, a slot 122 is provided on the limiting portion, and a snap-fit ​​portion 221 is provided on the inner wall of the shaft hole 210 of the brush head 200 for cooperating with the slot 122. When the connecting shaft 121 is installed in the shaft hole 210, the slot 122 is engaged with the snap-fit ​​portion 221, thereby further limiting the relative position between the connecting shaft 121 and the brush head 200, thereby preventing the connecting shaft 121 from escaping from the shaft hole 210. It should be noted that the snap-fit ​​portion can also be provided on the limiting portion, and the slot can be provided on the inner wall of the shaft hole 210.

[0037] In some embodiments, a first socket is provided on the first fixing member, and a second socket is provided on the brush head 200 at a position corresponding to the first socket. A pin or bolt is inserted between the first socket and the second socket to fix the brush head 200 and the toothbrush connection structure 100 together.

[0038] In this embodiment, the matching tolerance between the connecting shaft 121 and the shaft hole 210 is set to 0, and the matching between the shaft hole 210 and the connecting shaft 121 is mainly based on the matching between the slot 122 and the locking portion 221. The connecting shaft 121 is installed in the shaft hole 210, which is convenient for disassembly and stable for fixation.

[0039] Specifically, an elastic rod 220 is provided in the shaft hole 210, one end of the elastic rod 220 is fixedly connected to the brush head 200, and the locking portion 221 is provided at the other end of the elastic rod 220. In the natural state, there is a gap between the end of the elastic rod 220 with the locking portion 221 and the inner wall of the brush head 200. During the installation of the connecting shaft 121, the limiting portion will squeeze the elastic rod 220 to move toward the inner wall of the brush head 200 until the locking groove 122 is engaged with the locking portion 221. When the connecting shaft 121 is pulled out, the elastic rod 220 will return to its original state. The connecting shaft 121 can be installed and disassembled more conveniently through the elastic rod 220.

[0040] Preferably, the slot 122 is an arcuate slot and the engaging portion 221 has an arcuate surface to facilitate detachment of the brush head 200 from the toothbrush connection structure 100. Of course, the slot 122 or the engaging portion 221 can also be made of an elastic material that can be deformed under force to facilitate detachment.

[0041] Preferably, the brush head 200, the elastic rod 220 and the engaging portion 221 are integrally formed to facilitate manufacturing and increase strength.

[0042] It should be noted that, in this embodiment, the locking groove 122 may also be provided on the inner wall of the brush head 200 , and the locking portion 221 may be provided on the toothbrush connecting structure 100 .

[0043] Reference 1- Figure 6 Preferably, the connecting shaft 121 is a metal shaft. By making the connecting shaft 121 out of metal, the connection strength between the toothbrush connecting structure 100 and the brush head 200 can be improved, thereby increasing the service life. It should be noted that the metal material in this embodiment is a metal that is solid under normal conditions, such as aluminum, iron, steel, and copper. Preferably, the metal material in this embodiment is a metal or alloy that is stronger than aluminum.

[0044] Reference Figures 1-4 In this embodiment, a motor is installed inside the brush handle 300. Its motor shaft 310 extends from the end of the brush handle 300 connected to the toothbrush connecting structure 100. The second fixing member 130 is provided with a mounting hole 131 adapted for the motor shaft 310. The motor shaft 310 is installed in the mounting hole 131. The motor shaft 310 can be an interference fit, a transition fit, or a clearance fit with the mounting hole 131. Preferably, the fitting tolerance between the motor shaft 310 and the mounting hole 131 is 0 to better transmit the force on the motor shaft 310 to the toothbrush connecting structure 100. The force output by the motor is transmitted to the toothbrush connecting structure 100 through the motor shaft 310, and then transmitted to the brush head 200 through the connecting shaft 121 on the toothbrush connecting structure 100, thereby driving the brush head 200 to vibrate.

[0045] Reference Figure 4 In this embodiment, the central axis of the fixing hole 114 provided on the second fixing member 130 and the midline axis of the mounting hole 131 are the same axis, so as to better transmit the force output by the motor to the brush head 200 .

[0046] Reference Figure 4 、 Figure 6 In this embodiment, an isolation portion 111 is provided on the main body 110, and the isolation portion 111 is located between the fixing hole 114 and the mounting hole 131. The isolation portion 111 is made of an insulating material, and the motor shaft 310 is separated from the metal shaft by the isolation portion 111. In particular, when the connecting shaft 121 is a metal shaft, not only the strength of the connecting shaft 121 is increased, but also after the metal shaft and the motor shaft 310 are separated by the isolation portion 111, the static electricity generated on the toothbrush connecting structure 100 is not easily transmitted to the motor shaft 310 through the metal shaft and affects the operation of the motor, and can prevent human factors from causing electric shock and causing damage to the internal components of the electric toothbrush in this embodiment. In addition, it can also prevent the motor or machine from leaking electricity and transferring electricity to the metal shaft, causing unnecessary personal injury.

[0047] Preferably, the isolating portion 111 is integrally formed with the main body 110 to facilitate manufacturing and increase the connection strength between the isolating portion 111 and the main body 110. In this case, the mounting hole 131 is not connected to the fixing hole 114, and the isolating portion 111 is a part of the main body 110. Since the main body 110 is made of an insulating material, the isolating portion 111 can separate the connecting shaft 121 from the motor shaft 310 to prevent static electricity from affecting the motor.

[0048] Of course, in some other embodiments, the isolation portion 111 can be provided separately from the main body 110. Specifically, the fixing hole 114 is connected to the mounting hole 131, and the isolation portion 111 is an insulating block having a shape similar to the inner wall of the fixing hole 114 or the inner wall of the mounting hole 131. During installation, the isolation portion 111 is installed between the connecting shaft 121 and the motor shaft 310, thereby preventing the connecting shaft 121 from directly contacting the motor shaft 310, thereby preventing static electricity from affecting the motor.

[0049] Reference Figure 3-Figure 6In this embodiment, the second fixing member 130 and the main body 110 are preferably integrally formed to enhance the strength of the toothbrush connection structure 100. In this embodiment, the main body 110 has a fixing portion for fixing the motor shaft 310 to prevent the motor shaft 310 from escaping from the mounting hole 131. Preferably, the fixing portion is a first through hole 112 provided on the main body 110. The first through hole 112 passes through the mounting hole 131. The motor shaft 310 is provided with a second through hole 311 corresponding to the position of the first through hole 112. The first through hole 112 and the second through hole 311 are connected by a fastener 113. The fastener 113 can be a pin, a bolt, a fixing column, etc. Since the end of a pin or bolt is generally larger in diameter than the rod, both ends of the first through hole 112 in this embodiment extend radially outward to form an avoidance groove 1121. The avoidance groove 1121 is used to accommodate the end of the fastener 113. This can prevent the fastener 113 from being partially exposed outside the main body 110 and affecting the installation of the toothbrush connecting structure 100.

[0050] Reference Figure 2-Figure 6 In this embodiment, a counterweight groove 140 is defined on the main body 110. A counterweight block 141 is installed in the counterweight groove 140. The counterweight block 141 is used to adjust the motion of the toothbrush head 200, such as adjusting the swing amplitude of the brush head 200, and also to reduce vibration noise. Specifically, the counterweight groove 140 is an annular groove, and the central axis of the annular groove is aligned with the central axis of the connecting shaft 121. This makes it easier to calculate and adjust the counterweight of the toothbrush connection structure 100.

[0051] The above disclosure is merely a preferred embodiment of the present invention and certainly cannot be used to limit the scope of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope of the present invention.

Claims

1. A toothbrush connection structure, characterized in that: include: main body; a first fixing member, the first fixing member comprising a connecting shaft and a limiting portion; a fixing hole provided in the main body, one end of the connecting shaft being fixedly installed in the fixing hole, the limiting portion being sleeved and connected to the connecting shaft and fixed to the main body, the limiting portion being provided with a card slot, the limiting portion being used to engage with the brush head through the card slot and restrict the brush head from coming out; the main body is detachably connected to the brush head via the first fixing member; a second fixing member, the second fixing member being integrally formed with the main body and having a mounting hole for mounting a motor shaft, the main body being detachably connected to the brush handle via the second fixing member; An isolation portion is provided on the main body, and the isolation portion is an insulating block with a shape similar to the inner wall of the fixing hole or the inner wall of the mounting hole. The isolation portion is located between the fixing hole and the mounting hole, and is used to separate the connecting shaft from the motor shaft; the central axis of the fixing hole and the central axis of the mounting hole are the same axis, so that the connecting shaft and the motor shaft are coaxially arranged.

2. The toothbrush connection structure according to claim 1, characterized in that: The connecting shaft is a metal shaft.

3. The toothbrush connection structure according to any one of claims 1-2, characterized in that: A counterweight groove is provided on the main body, and the counterweight groove is used for placing a counterweight block.

4. Brush head structure, characterized in that, The toothbrush comprises a brush head and a toothbrush connecting structure as described in any one of claims 1 to 2, wherein the brush head is detachably connected to the toothbrush connecting structure.

5. The brush head structure according to claim 4, characterized in that: The first fixing member includes a connecting shaft, a fixing hole for fixing the connecting shaft is opened on the main body, one end of the connecting shaft is fixedly installed in the fixing hole, and the brush head has an axial hole for installing the connecting shaft, and the other end of the connecting shaft is fixedly installed in the axial hole.

6. The brush head structure according to claim 5, characterized in that: The first fixing member is provided with a card slot or a card engaging portion, and the inner wall of the shaft hole is provided with a card engaging portion or a card slot, and the card slot is card-engaged with the card engaging portion.

7. An electric toothbrush, characterized in that It comprises a brush head, a brush handle and a toothbrush connecting structure as described in any one of claims 1 to 2, wherein the toothbrush connecting structure is detachably connected to the brush head, and the toothbrush connecting structure is detachably connected to the brush handle.

8. The electric toothbrush according to claim 7, characterized in that The second fixing member is provided with a mounting hole for mounting the motor shaft, the main body is provided with a first through hole, the first through hole passes through the mounting hole, the motor shaft is provided with a second through hole corresponding to the position of the first through hole, and the first through hole and the second through hole are connected by a fastener.

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