Electric toothbrush and brush head

Abstract

The utility model discloses an electric toothbrush and a brush head, the electric toothbrush comprises the brush head, a toothbrush main body and a shaft sleeve, the top of the toothbrush main body is provided with an output shaft, and the shaft sleeve is provided with a shaft sleeve channel. The shaft sleeve is arranged on the top of the toothbrush body in the mode that the output shaft is kept in the shaft sleeve channel of the shaft sleeve in a vibratable mode, a gap is formed between the shaft sleeve and the output shaft, and the top of the shaft sleeve is lower than the top of the output shaft so that the top of the output shaft can be exposed. Wherein the brush head is detachably mounted at the top of the output shaft, so that the vibration amplitude of the shaft sleeve can be greatly reduced, and when a user uses the electric toothbrush to brush teeth, the teeth do not feel uncomfortable even if the teeth are in contact with the shaft sleeve.

Description

Technical Field

[0001] The utility model relates to a toothbrush, in particular to an electric toothbrush and a brush head. Background Art

[0002] In recent years, electric toothbrushes have become increasingly popular. A Chinese utility model patent with authorization announcement number CN218739216U discloses an electric toothbrush, which includes a connecting shaft, a brush head and a buckle assembly, wherein the brush head is detachably connected to one end of the connecting shaft, the brush head includes a brush head body and a scrubbing part, the brush head body includes a head and a rod connected to the head, in the axial direction of the rod, the length of the rod is less than or equal to the length of the head, and the maximum width W1 of the cross section of the rod is less than the maximum width W2 of the cross section of the head; the scrubbing part is fixedly mounted on the head; the buckle assembly includes an elastic buckle and A metal buckle sleeve is sleeved on the periphery of the elastic buckle, the elastic buckle comprises a main body and a buckle portion connected to the main body, the main body is arranged in a clearance on the side of the buckle portion away from the metal buckle sleeve; a deformation space is formed between the buckle portion and the metal buckle sleeve; the brush head body is injection-molded and covered on the periphery of the metal buckle sleeve, and the buckle assembly is at least partially located on the rod; an insert hole is provided on the end surface of the rod away from the head, the insert hole is arranged corresponding to the elastic buckle, and the connecting shaft extends into the clearance of the main body through the insert hole and is clamped with the buckle portion. The defects of the electric toothbrush in the prior art are: first, the connecting shaft is directly exposed. Since the connecting shaft transmits power to the brush head by high-frequency vibration, when the user uses the electric toothbrush to brush his teeth, if the connecting shaft touches the teeth, the high-frequency vibration of the connecting shaft will cause the connecting shaft to repeatedly collide with the teeth, which will not only cause discomfort to the teeth but also cause damage to the health of the teeth; secondly, the structure of the buckle assembly of the electric toothbrush in the prior art is complex, and it is required to configure the metal buckle sleeve, otherwise the deformation space cannot be formed between the elastic buckle and the brush head body, and then the connection between the elastic buckle and the connecting shaft cannot be achieved. Utility Model Content

[0003] One purpose of the utility model is to provide an electric toothbrush and a brush head, wherein the electric toothbrush has a sleeve sleeved on the outside of an output shaft to hide the output shaft and prevent the output shaft from directly contacting the user's teeth. Since the output shaft is vibrably held in the sleeve channel of the sleeve and there is a gap between the sleeve and the output shaft, the vibration of the sleeve can be greatly reduced. Therefore, when the user brushes his teeth with the electric toothbrush of the utility model, the teeth will not feel discomfort even if the teeth contact the sleeve, thereby achieving the purpose of protecting the teeth.

[0004] One object of the utility model is to provide an electric toothbrush and a brush head, wherein the electric toothbrush has a flexible waterproof ring sealingly sleeved on the top of the output shaft and the outer edge of the waterproof ring sealingly connected to the top of the sleeve, in this way, on the one hand, the waterproof ring can prevent water or a mixture of water and toothpaste from entering the sleeve channel of the sleeve, thereby improving the waterproofness and hygiene of the electric toothbrush, and on the other hand, the waterproof ring can absorb vibrations and prevent the vibrations generated by the output shaft from being transmitted to the sleeve through the waterproof ring, thereby reducing the vibrations of the sleeve.

[0005] One purpose of the present invention is to provide an electric toothbrush and a brush head. Compared with the electric toothbrush in the prior art, the brush head of the electric toothbrush of the present invention does not need to be configured with a metal snap sleeve, but only needs to be configured with a fixing element and an elastic element, which makes the electric toothbrush of the present invention more concise in structure, thereby helping to reduce the cost of the electric toothbrush and improve the reliability of the electric toothbrush.

[0006] According to one aspect of the present invention, the present invention provides an electric toothbrush, comprising:

[0007] Brush head;

[0008] a toothbrush body, wherein the top of the toothbrush body has an output shaft; and

[0009] A sleeve, wherein the sleeve has a sleeve channel, the sleeve is arranged on the top of the toothbrush body in a manner that the output shaft is vibrably held in the sleeve channel of the sleeve, a gap is provided between the sleeve and the output shaft, and the top of the sleeve is lower than the top of the output shaft to expose the top of the output shaft, wherein the brush head is detachably mounted on the top of the output shaft.

[0010] According to an embodiment of the present invention, the shaft sleeve integrally extends upward from the top of the outer shell of the toothbrush body, so as to set the shaft sleeve on the toothbrush body.

[0011] According to one embodiment of the utility model, the electric toothbrush includes a flexible waterproof ring, which has a ring body channel. The top of the output shaft passes through the ring body channel of the waterproof ring to seal the waterproof ring on the top of the output shaft, and the outer edge of the waterproof ring is sealedly connected to the top of the sleeve.

[0012] According to an embodiment of the utility model, the outer edge of the waterproof ring is bonded to the top of the shaft sleeve; or the waterproof ring is integrally formed on the top of the shaft sleeve through a rubber encapsulation process.

[0013] According to one embodiment of the utility model, the electric toothbrush includes a cover body, the cover body has a cover body through hole, the top of the output shaft passes through the cover body channel of the cover body to sleeve the cover body on the top of the output shaft, wherein the cover body is fixedly connected to the top of the sleeve, and the outer edge of the waterproof ring is clamped between the cover body and the sleeve.

[0014] According to one embodiment of the utility model, the cover body has an annular cover body groove, and the sleeve has an annular sleeve groove, wherein the outer edge of the waterproof ring has a top boss and a bottom boss, the top boss of the waterproof ring protrudes into the cover body groove of the cover body, and the bottom boss of the waterproof ring protrudes into the sleeve groove of the sleeve.

[0015] According to one embodiment of the utility model, the cover body is bonded to the top of the sleeve; or the cover body is ultrasonically welded to the top of the sleeve; or the cover body is clamped to the top of the sleeve; or the cover body is screwed to the top of the sleeve.

[0016] According to one embodiment of the utility model, the top of the output shaft has a snap-in groove, wherein the brush head includes a head, a rod portion extending downward from the head integrally, and a snap-in portion arranged in the rod groove of the rod portion, the snap-in portion includes a fixing element and an elastic element, the fixing element has a snap-in through-hole passing through the opposite ends of the fixing element and a side channel connected to the snap-in through-hole, the elastic element has a first extension arm and a second extension arm, the first extension arm and the second extension arm extend in a "V" shape, the end of the first extension arm and the end of the second extension arm are fixedly connected to the outer wall of the fixing element, and the connecting end of the first extension arm and the second extension arm are fixedly connected to the outer wall of the fixing element. The connecting end of the arm extends to the snap-in through hole through the side channel of the fixing element, wherein when the output shaft begins to be inserted into the snap-in through hole of the fixing element, the output shaft pushes the connecting end of the first extension arm and the connecting end of the second extension arm outwardly, so that the elastic element is elastically deformed and accumulates elastic potential energy, and when the position of the output shaft inserted into the snap-in groove corresponds to the position of the connecting end of the first extension arm and the connecting end of the second extension arm, the elastic element begins to restore its initial state and allows the connecting end of the first extension arm and the connecting end of the second extension arm to protrude into the snap-in groove of the output shaft for installing the brush head on the top of the output shaft.

[0017] According to one embodiment of the utility model, the end of the first extension arm and the end of the second extension arm of the elastic element are clamped between the outer wall of the fixing element and the inner wall of the rod portion to fixedly connect the end of the first extension arm and the end of the second extension arm to the outer wall of the fixing element.

[0018] According to one embodiment of the utility model, the outer wall of the fixing element has a receiving groove, the receiving groove is connected to the side channel, the depth dimension of the receiving groove is equal to the dimension of the end of the first extension arm and the end of the second extension arm, and the end of the first extension arm and the end of the second extension arm are received in the receiving groove of the fixing element.

[0019] According to another aspect of the present invention, the present invention further provides a brush head, which includes:

[0020] head;

[0021] a stem extending integrally downwardly from the head; and

[0022] A clamping portion is arranged in the rod groove of the rod part, and the clamping portion includes a fixing element and an elastic element. The fixing element has a clamping through hole passing through the opposite ends of the fixing element and a side channel connected to the clamping through hole. The elastic element has a first extension arm and a second extension arm, and the first extension arm and the second extension arm extend in a "V" shape. The ends of the first extension arm and the second extension arm are fixedly connected to the outer wall of the fixing element, and the connecting ends of the first extension arm and the second extension arm extend to the clamping through hole through the side channel of the fixing element.

[0023] According to one embodiment of the utility model, the end of the first extension arm and the end of the second extension arm of the elastic element are clamped between the outer wall of the fixing element and the inner wall of the rod portion to fixedly connect the end of the first extension arm and the end of the second extension arm to the outer wall of the fixing element.

[0024] According to one embodiment of the utility model, the outer wall of the fixing element has a receiving groove, the receiving groove is connected to the side channel, the depth dimension of the receiving groove is equal to the dimension of the end of the first extension arm and the end of the second extension arm, and the end of the first extension arm and the end of the second extension arm are received in the receiving groove of the fixing element.

[0025] According to another aspect of the present invention, the present invention further provides an electric toothbrush, comprising:

[0026] A toothbrush body, wherein the top of the toothbrush body has an output shaft, and the top of the output shaft has a snap-in groove; and

[0027] A brush head, wherein the brush head comprises a head, a rod portion integrally extending downward from the head, and a clamping portion arranged in a rod groove of the rod portion, the clamping portion comprises a fixing element and an elastic element, the fixing element has a clamping through hole penetrating through opposite ends of the fixing element and a side channel connected to the clamping through hole, the elastic element has a first extension arm and a second extension arm, the first extension arm and the second extension arm extend in a "V" shape, the ends of the first extension arm and the second extension arm are fixedly connected to the outer wall of the fixing element, and the connecting end of the first extension arm and the connecting end of the second extension arm are connected through the fixing element The side channel extends to the snap-in through hole, wherein when the output shaft begins to be inserted into the snap-in through hole of the fixing element, the output shaft pushes the connecting end of the first extension arm and the connecting end of the second extension arm outward to cause the elastic element to elastically deform and accumulate elastic potential energy, and when the output shaft is inserted into the snap-in groove at a position corresponding to the position of the connecting end of the first extension arm and the connecting end of the second extension arm, the elastic element begins to restore its initial state and allows the connecting end of the first extension arm and the connecting end of the second extension arm to protrude into the snap-in groove of the output shaft for installing the brush head on the top of the output shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional schematic diagram of an electric toothbrush according to a preferred embodiment of the utility model.

[0029] Figure 2 It is a cross-sectional schematic diagram of the electric toothbrush according to the above preferred embodiment of the utility model.

[0030] Figure 3 It is a three-dimensional schematic diagram of a toothbrush body of the electric toothbrush according to the above preferred embodiment of the present utility model.

[0031] Figure 4 It is a schematic diagram of the exploded view of the toothbrush body of the electric toothbrush according to the above preferred embodiment of the present utility model.

[0032] Figure 5 A three-dimensional schematic diagram of a brush head of the electric toothbrush according to the preferred embodiment of the present invention.

[0033] Figure 6 It is a schematic diagram of the decomposition of the brush head of the electric toothbrush according to the above preferred embodiment of the present utility model.

[0034] Figure 7 It is a cross-sectional schematic diagram of a partial position of one of the processes in which the brush head of the electric toothbrush according to the above preferred embodiment of the present utility model is installed on the toothbrush body.

[0035] Figure 8 It is a cross-sectional schematic diagram of a partial position of the second process of installing the brush head of the electric toothbrush on the toothbrush body according to the above preferred embodiment of the present utility model.

[0036] Fig. 9 It is a cross-sectional schematic diagram of a partial position of the third process of installing the brush head of the electric toothbrush on the toothbrush body according to the above preferred embodiment of the present utility model.

[0037] Fig.10 It is a cross-sectional schematic diagram of a modified example of the electric toothbrush according to the above preferred embodiment of the utility model.

[0038] Fig.11 It is a cross-sectional schematic diagram of another modified example of the electric toothbrush according to the above preferred embodiment of the utility model. DETAILED DESCRIPTION

[0039] Before describing in detail any embodiment of the utility model, it should be understood that the utility model is not limited to the construction and arrangement details of the components described below or illustrated in the following figures in its application. The utility model can have other embodiments and can be practiced or carried out in various ways. In addition, it should be understood that the words and terms used here are for the purpose of description and should not be considered as restrictive. The use of "including" or "having" and its variations herein is intended to cover the items and their equivalents and additional items displayed below. Unless otherwise specified or limited, the terms "install", "connect", "support" and "couple" and their variations are widely used and cover direct installation and indirect installation, connection, support and connection. In addition, "connect" and "couple" are not limited to physical or mechanical connections or connections.

[0040] Furthermore, on the first aspect, in the disclosure of the present invention, the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore the above terms cannot be understood as limitations on the present invention; on the second aspect, the term "one" should be understood as "at least one" or "one or more", that is, in one embodiment, the number of an element may be one, while in another embodiment, the number of the element may be multiple, and the term "one" cannot be understood as a limitation on the quantity.

[0041] Refer to the attached drawings of the specification of this utility model Figures 1 to 9In the following description, an electric toothbrush according to a preferred embodiment of the present invention will be disclosed and explained, wherein the electric toothbrush includes a toothbrush body 10 , a sleeve 20 and a brush head 30 .

[0042] Specifically, the toothbrush body 10 includes a shell 11, a motor assembly 12, a battery 13, a circuit board 14, a control switch 15, a bracket 16 and a charging port 17, wherein the shell 11 has a shell space 111 and a top opening 112, a side opening 113 and a bottom opening 114 respectively connected to the shell space 111, the motor assembly 12 includes a power part 121 and an output shaft 122 connected to the power part 121, the power part 121 is accommodated in the shell space 111 of the shell 11, and the output shaft 122 extends to the outside of the shell 11 through the top opening 112 of the shell 11, The battery 13 and the circuit board 14 are both accommodated in the housing space 111 of the housing 11, and the battery 13 and the power part 121 are respectively connected to the circuit board 14, the control switch 15 is arranged at the side opening 113 of the housing 11, and the control switch 15 is connected to the circuit board 14, and the user can control the working state of the power part 121 through the control switch 15, the charging port 17 is arranged at the bracket 16, and the charging port 17 is connected to the circuit board 14, the bracket 16 is arranged at the bottom opening 114 of the housing 11, and the user can charge the battery 13 through the charging port 17. That is, the toothbrush body 10 has the output shaft 122.

[0043] The sleeve 20 has a sleeve channel 21, and the sleeve 20 is arranged on the top of the toothbrush body 10 in such a way that the output shaft 122 is vibrably held in the sleeve channel 21 of the sleeve 20, there is a gap between the sleeve 20 and the output shaft 122, and the top of the sleeve 20 is lower than the top of the output shaft 122 so that the top of the output shaft 122 is exposed, so that the brush head 30 can be installed on the top of the output shaft 122 of the toothbrush body 10. When the battery 13 supplies power to the power part 121 of the motor assembly 12 through the circuit board 14, the power part 121 can drive the output shaft 122 to generate high-frequency vibrations, thereby driving the brush head 30 to generate high-frequency vibrations to help the user brush their teeth. Since the sleeve 20 is sleeved on the outside of the output shaft 122 and there is a gap between the sleeve 20 and the output shaft 122, the vibration of the sleeve 20 is greatly reduced. Therefore, when the user uses the electric toothbrush to brush his teeth, even if the sleeve 20 contacts the teeth, the teeth will not feel uncomfortable, thereby achieving the purpose of protecting the teeth.

[0044] Preferably, in the attached Figures 1 to 9 In the specific example of the electric toothbrush of the present invention shown, the sleeve 20 integrally extends upward from the top of the shell 11 of the toothbrush body 10 to set the sleeve 20 on the toothbrush body 10. That is, the sleeve 20 and the shell 11 are an integrated structure, which is not only conducive to reducing the assembly cost of the electric toothbrush, but also can improve the sealing of the electric toothbrush, and prevent water or a mixture of water and toothpaste from entering the housing space 111 of the shell 11.

[0045] Continue to refer to the attached Figures 1 to 9 The electric toothbrush includes a flexible waterproof ring 40, which has a ring channel 41. The top of the output shaft 122 passes through the ring channel 41 of the waterproof ring 40, so that the waterproof ring 40 is sealed on the top of the output shaft 122. The outer edge of the waterproof ring 40 is sealed and connected to the top of the sleeve 20. In this way, on the one hand, the waterproof ring 40 can prevent water or a mixture of water and toothpaste from entering the sleeve channel 21 of the sleeve 20, thereby improving the waterproofness and hygiene of the electric toothbrush. On the other hand, the waterproof ring 40 can absorb vibrations and prevent the vibrations generated by the output shaft 122 from being transmitted to the sleeve 20 through the waterproof ring 40, thereby reducing the vibrations of the sleeve 20, which is crucial for users to protect their dental health when brushing their teeth with the electric toothbrush.

[0046] In the attached Figures 1 to 9In this specific example of the electric toothbrush shown, the electric toothbrush further includes a cover body 50, the cover body 50 has a cover body through hole 51, the top of the output shaft 122 passes through the cover body through hole 51 of the cover body 50, so as to sleeve the cover body 50 on the top of the output shaft 122, wherein the cover body 50 is fixedly connected to the top of the sleeve 20, and the outer edge of the waterproof ring 40 is clamped between the cover body 50 and the sleeve 20 to seal the outer edge of the waterproof ring 40 to the top of the sleeve 20.

[0047] It is worth mentioning that the specific manner in which the cover 50 is fixedly connected to the top of the sleeve 20 is not limited in this specific example of the electric toothbrush of the utility model. Figures 1 to 9 In this specific example of the electric toothbrush shown, the cover 50 and the sleeve 20 are fixedly connected by ultrasonic welding, thereby ensuring that the outer edge of the waterproof ring 40 is sealedly connected to the top of the sleeve 20. Optionally, in other specific examples of the electric toothbrush of the present invention, the cover 50 can be bonded to the top of the sleeve 20, or the cover 50 is clamped to the top of the sleeve 20, or the cover 50 is screwed to the top of the sleeve 20.

[0048] Reference Figure 2 The cover body 50 has an annular cover body groove 52, and the sleeve 20 has an annular sleeve groove 22, wherein the outer edge of the waterproof ring 40 has a top boss 42 and a bottom boss 43, wherein the top boss 42 of the waterproof ring 40 protrudes into the cover body groove 52 of the cover body 50, and the bottom boss 43 of the waterproof ring 40 protrudes into the sleeve groove 22 of the sleeve 20. In this way, on the one hand, the outer edge of the waterproof ring 40 can be reliably clamped between the cover body 50 and the sleeve 20 to prevent the outer edge of the waterproof ring 40 from falling off from between the cover body 50 and the sleeve 20, and on the other hand, the sealing performance of the combined position of the cover body 50, the waterproof ring 40 and the sleeve 20 can be further increased.

[0049] Attached Fig.10 A modified example of the electric toothbrush of the utility model is shown, and the attached Figures 1 to 9 The electric toothbrush shown is different in that Fig.10 In the specific example of the electric toothbrush shown, the waterproof ring 40 is integrally formed on the cover 50 by a rubber encapsulation process, and the cover 50 is fixedly connected to the top of the sleeve 20 in a manner that the outer edge of the waterproof ring 40 is clamped between the cover 50 and the sleeve 20, thereby sealingly connecting the outer edge of the waterproof ring 40 to the top of the sleeve 20. Figures 1 to 10 The electric toothbrush shown is the same as that in the attached Figure 7 In the specific example of the electric toothbrush shown, the cover 50 and the sleeve 20 can be welded by ultrasonic welding.

[0050] Attached Fig.11 A modified example of the electric toothbrush of the utility model is shown, and the attached Figures 1 to 9 The electric toothbrush shown is different in that Fig.11 In the specific example of the electric toothbrush shown, the electric toothbrush may not be configured with the cover 50, and the waterproof ring 40 may be integrally formed on the top of the sleeve 20 by a rubber encapsulation process to seal the outer edge of the waterproof ring 40 to the top of the sleeve 20. Alternatively, in other examples of the electric toothbrush, the outer edge of the waterproof ring 40 and the top of the sleeve 20 may be bonded by glue.

[0051] Continue to refer to the attached Figure 2 , Figures 5 to 9 The top of the output shaft 122 of the toothbrush body 10 has a snap-in groove 1221, so that the brush head 30 can be fixedly mounted on the top of the output shaft 122. Figure 5 and Figure 6 The brush head 30 includes a head 31, a rod 32 and a clamping portion 33. The rod 32 integrally extends downward from the head 31 and has a rod groove 321. The clamping portion 33 is disposed in the rod groove 321 of the rod 32. When the top of the output shaft 122 of the toothbrush body 10 is inserted into the clamping portion 33 of the brush head 30, the clamping portion 33 clamps the clamping groove 1221 of the output shaft 122, so that the brush head 30 is fixedly mounted on the top of the output shaft 122.

[0052] More specifically, the clamping portion 33 includes a fixing element 331 and an elastic element 332, wherein the fixing element 331 has a clamping through hole 3311 and a lateral channel 3312, the clamping through hole 3311 passes through the opposite ends of the fixing element 331, and the lateral channel 3312 is connected to the clamping through hole 3311 at the side of the fixing element 331, and the fixing element 331 is embedded in the rod groove 321 of the rod portion 32 to set the clamping portion 33 in the rod groove 321 of the rod portion 32. The elastic element 332 has a first extension arm 3321 and a second extension arm 3322, the first extension arm 3321 and the second extension arm 3322 extend in a "V" shape, the ends of the first extension arm 3321 and the second extension arm 3322 are fixedly connected to the outer wall of the fixed element 331, and the connecting ends of the first extension arm 3321 and the second extension arm 3322 extend to the snap-in through hole 3311 through the side channel 3312 of the fixed element 331. When the output shaft 122 of the toothbrush body 10 begins to insert into the snap-fitting through hole 3311 of the fixing element 331, the output shaft 122 pushes the connecting end of the first extension arm 3321 and the connecting end of the second extension arm 3322 outward, so that the elastic element 332 is elastically deformed and accumulates elastic potential energy. When the output shaft 122 is inserted into the snap-fitting groove 1221 at a position corresponding to the position of the connecting end of the first extension arm 3321 and the connecting end of the second extension arm 3321, the elastic element 332 begins to restore the initial state and allows the connecting end of the first extension arm 3321 and the connecting end of the second extension arm 3322 to protrude into the snap-fitting groove 1221 of the output shaft 122, so as to install the brush head 30 on the top of the output shaft 122. Figures 7 to 9 .

[0053] Preferably, in a specific example of the electric toothbrush of the present invention, the shape and size of the fixing element 331 match the shape and size of the rod portion 32, so that after the fixing element 331 is inserted into the rod groove 321 of the rod portion 32, based on the friction force generated between the inner wall of the rod portion 32 and the outer wall of the fixing element 331, the fixing element 331 is reliably set in the rod groove 321 of the rod portion 32.

[0054] Furthermore, the ends of the first extension arm 3321 and the second extension arm 3322 of the elastic element 332 are clamped between the outer wall of the fixing element 331 and the inner wall of the rod portion 32 to fixedly connect the ends of the first extension arm 3321 and the second extension arm 3322 to the outer wall of the fixing element 331. In this way, the connecting ends of the first extension arm 3321 and the second extension arm 3322 are maintained at positions protruding into the snap-fitting through hole 3311 of the fixing element 331, so that when the output shaft 122 of the toothbrush body 10 is inserted into the snap-fitting groove 1221 at a position corresponding to the positions of the connecting ends of the first extension arm 3321 and the connecting ends of the second extension arm 3322, the connecting ends of the first extension arm 3321 and the second extension arm 3322 can automatically protrude into the snap-fitting groove 1221 of the output shaft 122, so that the brush head 30 is reliably mounted on the top of the output shaft 122.

[0055] Furthermore, the outer wall of the fixing element 331 has a receiving groove 3313, and the receiving groove 3313 is connected to the side channel 3312. The depth dimension of the receiving groove 3313 is equal to the dimension of the end of the first extension arm 3321 and the end of the second extension arm 3322, and the end of the first extension arm 3321 and the end of the second extension arm 3322 are received in the receiving groove 3313 of the fixing element 331. In this way, after the fixing element 331 is inserted into the rod groove 321 of the rod portion 32, the brush head 30 prevents the generation of a gap between the inner wall of the rod portion 32 and the outer wall of the fixing element 331, which is crucial for ensuring the hygiene of the electric toothbrush.

[0056] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A brush head, characterized in that: include: head; a stem extending integrally downward from the head; as well as A clamping portion is arranged in the rod groove of the rod part, and the clamping portion includes a fixing element and an elastic element. The fixing element has a clamping through hole passing through the opposite ends of the fixing element and a side channel connected to the clamping through hole. The elastic element has a first extension arm and a second extension arm. The first extension arm and the second extension arm extend in a "V" shape. The ends of the first extension arm and the second extension arm are fixedly connected to the outer wall of the fixing element. The connecting ends of the first extension arm and the second extension arm extend to the clamping through hole through the side channel of the fixing element.

2. A brush head according to claim 1, wherein the end of the first extension arm and the end of the second extension arm of the elastic element are clamped between the outer wall of the fixed element and the inner wall of the rod portion to fixedly connect the end of the first extension arm and the end of the second extension arm to the outer wall of the fixed element.

3. The brush head according to claim 2, wherein the outer wall of the fixing element has a receiving groove, the receiving groove is connected to the side channel, the depth dimension of the receiving groove is equal to the dimension of the end of the first extension arm and the end of the second extension arm, and the end of the first extension arm and the end of the second extension arm are received in the receiving groove of the fixing element.

4. An electric toothbrush, characterized in that: include: A toothbrush body, wherein the top of the toothbrush body is provided with an output shaft, and the top of the output shaft is provided with a clamping groove; and A brush head, wherein the brush head comprises a head, a rod portion integrally extending downward from the head, and a clamping portion arranged in a rod groove of the rod portion, the clamping portion comprises a fixing element and an elastic element, the fixing element has a clamping through hole penetrating through opposite ends of the fixing element and a side channel connected to the clamping through hole, the elastic element has a first extension arm and a second extension arm, the first extension arm and the second extension arm extend in a "V" shape, the ends of the first extension arm and the second extension arm are fixedly connected to the outer wall of the fixing element, and the connecting end of the first extension arm and the connecting end of the second extension arm are connected through the fixing element The side channel extends to the snap-in through hole, wherein when the output shaft begins to be inserted into the snap-in through hole of the fixing element, the output shaft pushes the connecting end of the first extension arm and the connecting end of the second extension arm outward to cause the elastic element to elastically deform and accumulate elastic potential energy, and when the output shaft is inserted into the snap-in groove at a position corresponding to the position of the connecting end of the first extension arm and the connecting end of the second extension arm, the elastic element begins to restore its initial state and allows the connecting end of the first extension arm and the connecting end of the second extension arm to protrude into the snap-in groove of the output shaft for installing the brush head on the top of the output shaft.

5. An electric toothbrush according to claim 4, wherein the end of the first extension arm and the end of the second extension arm of the elastic element are clamped between the outer wall of the fixed element and the inner wall of the rod portion to fixedly connect the end of the first extension arm and the end of the second extension arm to the outer wall of the fixed element.

6. An electric toothbrush according to claim 5, wherein the outer wall of the fixing element has a receiving groove, the receiving groove is connected to the side channel, the depth dimension of the receiving groove is equal to the dimension of the end of the first extension arm and the end of the second extension arm, and the end of the first extension arm and the end of the second extension arm are received in the receiving groove of the fixing element.

7. An electric toothbrush according to claim 4, wherein the electric toothbrush comprises a sleeve having a sleeve channel, the sleeve being arranged at the top of the toothbrush body in such a manner that the output shaft is vibrably retained in the sleeve channel of the sleeve, a gap being provided between the sleeve and the output shaft, and the top of the sleeve being lower than the top of the output shaft to expose the top of the output shaft, wherein the brush head is detachably mounted on the top of the output shaft.

8. The electric toothbrush according to claim 7, wherein the sleeve integrally extends upward from the top of the outer shell of the toothbrush body to set the sleeve on the toothbrush body.

9. An electric toothbrush according to claim 8, wherein the electric toothbrush comprises a flexible waterproof ring, the waterproof ring having a ring channel, the top of the output shaft passes through the ring channel of the waterproof ring to seal the waterproof ring on the top of the output shaft, and the outer edge of the waterproof ring is sealedly connected to the top of the sleeve.

10. The electric toothbrush according to claim 9, wherein an outer edge of the waterproof ring is bonded to the top of the sleeve.

11. The electric toothbrush according to claim 9, wherein the waterproof ring is integrally formed on the top of the sleeve by a rubber encapsulation process.

12. An electric toothbrush according to claim 9, wherein the electric toothbrush comprises a cover body, the cover body has a cover body through hole, the top of the output shaft passes through the cover body channel of the cover body to sleeve the cover body on the top of the output shaft, wherein the cover body is fixedly connected to the top of the sleeve, and the outer edge of the waterproof ring is clamped between the cover body and the sleeve.

13. An electric toothbrush according to claim 12, wherein the cover body has an annular cover body groove, and the sleeve has an annular sleeve groove, wherein the outer edge of the waterproof ring has a top boss and a bottom boss, the top boss of the waterproof ring protrudes into the cover body groove of the cover body, and the bottom boss of the waterproof ring protrudes into the sleeve groove of the sleeve.

14. The electric toothbrush according to claim 12, wherein the cover is bonded to the top of the sleeve.

15. The electric toothbrush according to claim 12, wherein the cover is ultrasonically welded to the top of the sleeve.

16. The electric toothbrush according to claim 12, wherein the cover is snap-fitted to the top of the sleeve.

17. The electric toothbrush according to claim 12, wherein the cover is screwed onto the top of the sleeve.

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