Electric toothbrush handle

The present invention discloses an electric toothbrush handle, which comprises: a first housing, wherein the first housing is provided with a first mounting cavity and a first mounting hole communicated with the first mounting cavity; a drive rod, wherein one end of the drive rod extends into the first mounting cavity from the first mounting hole; a transmission mechanism, wherein the transmission mechanism is arranged in the first mounting cavity, and the transmission mechanism comprises a mounting box and a transmission assembly arranged in the mounting box; and a drive motor, wherein the drive motor is arranged in the first mounting cavity, the mounting box is further provided with a third mounting hole, and the drive motor is in driving connection with the rotating member of the transmission mechanism through the third mounting hole. The present invention effectively improves the cleaning effect of the electric toothbrush.

TECHNICAL FIELD

The present invention relates to the technical field of daily necessities, and in particular, to an electric toothbrush handle.

BACKGROUND

In the field of electric toothbrushes, the design of an electric toothbrush handle is one of the key factors affecting the cleaning effect and use experience. A conventional electric toothbrush design usually relies on the swinging of a motor shaft to drive a brush head to reciprocate for achieving the purpose of cleaning teeth. However, this design has some problems in practical applications.

Firstly, the motor shaft generally has a small swing range, which limits the motion range and cleaning ability of the brush head. Due to the limited swing range, the brush head may not be able to penetrate deep between teeth and hard-to-reach areas, resulting in poor cleaning effects.

Secondly, the swing frequency and the force of the motor shaft are difficult to achieve the ideal cleaning effect. If the swing frequency is too low or the force is insufficient, dental plaque and food residues on the surfaces of the teeth cannot be effectively removed; and if the swing frequency is too high or the force is too great, unnecessary stimulation and damage may be caused to teeth and gums.

Therefore, how to design an electric toothbrush handle capable of increasing the swing range of the motor shaft and improving the cleaning effect becomes a technical issue to be resolved urgently in the field of electric toothbrushes.

SUMMARY

A primary objective of the present invention is to provide an electric toothbrush handle, which aims to design a stable support and guide structure, so as to solve the technical problem of the poor cleaning effect of the electric toothbrush.

To achieve the above objective, the present invention provides an electric toothbrush handle. The electric toothbrush handle comprises: a first housing, wherein the first housing is provided with a first mounting cavity and a first mounting hole communicated with the first mounting cavity;a drive rod, wherein one end of the drive rod extends into the first mounting cavity from the first mounting hole;a transmission mechanism, wherein the transmission mechanism is arranged in the first mounting cavity, the transmission mechanism comprises a mounting box and a transmission assembly arranged in the mounting box, the mounting box is provided with a second mounting hole corresponding to the first mounting hole, the drive rod extends into the mounting box from the second mounting hole, the transmission assembly comprises a first transmission arm fixed on the drive rod, a second transmission arm with one end hinged to the first transmission arm and a rotating member hinged to the other end of the second transmission arm, the rotating member comprises a main body and an eccentric shaft eccentrically arranged on the main body, and the rotating member is hinged to the second transmission arm through the eccentric shaft; anda drive motor, wherein the drive motor is arranged in the first mounting cavity, the mounting box is further provided with a third mounting hole, and the drive motor is in driving connection with the rotating member of the transmission mechanism through the third mounting hole.

Optionally, the mounting box comprises a second housing and a sealing cover matched with the second housing, the rotating member further comprises a first rotating shaft and a second rotating shaft that are coaxially arranged, the first rotating shaft is fixed at one end of the eccentric shaft far away from the main body, the second rotating shaft is fixed at one side of the main body opposite to the eccentric shaft, the sealing cover and the second housing are respectively provided with first limiting grooves corresponding to the first rotating shaft and the second rotating shaft, and the first rotating shaft and the second rotating shaft are located in the first limiting grooves.

Optionally, the second transmission arm is shaped as an elongated arc.

Optionally, the transmission assembly further comprises a third rotating shaft, the second transmission arm and the first transmission arm are both provided with mounting grooves, and two ends of the third rotating shaft are respectively located in the mounting grooves of the second transmission arm and the first transmission arm.

Optionally, the first transmission arm is provided with a fourth mounting hole, a limiting block is arranged in the fourth mounting hole of the first transmission arm, the drive rod is provided with a second limiting groove matched with the limiting block, the drive rod is fixed in the fourth mounting hole, and the limiting block is located in the second limiting groove.

Optionally, a first limiting boss used to limit the drive rod is convexly provided in the second housing, a third limiting groove is formed at a top of the first limiting boss, and an end portion of the drive rod is located in the third limiting groove.

Optionally, a second limiting boss used to limit the drive rod is provided on a periphery of the second mounting hole of the sealing cover, and the second mounting hole penetrates through the second limiting boss.

Optionally, the electric toothbrush handle further comprises a sealing rubber sleeve, the sealing rubber sleeve is sleeved on an outer wall of the drive rod, one end of the sealing rubber sleeve abuts against the second limiting boss, and the other end abuts against an inner wall of the first housing.

Optionally, the electric toothbrush handle further comprises a tightening spring, and the tightening spring is sleeved on one end of the sealing rubber sleeve far away from the second limiting boss.

Optionally, a third limiting boss adapted to the third mounting hole is arranged on a periphery of a drive shaft of the drive motor, and the third limiting boss is located in the third mounting hole.

Optionally, the electric toothbrush handle further comprises a mounting frame arranged in the first mounting cavity, a second mounting cavity is formed in the mounting frame, the drive motor is arranged in the second mounting cavity, and one end of the mounting frame is fixedly connected to the mounting box.

Optionally, the electric toothbrush handle further comprises a control assembly arranged in the first mounting cavity, the control assembly comprises a main control board electrically connected to the drive motor and a battery electrically connected to the main control board, a third mounting cavity is also formed in the mounting frame, the main control board is fixed to an outer wall of the mounting frame, and the battery is arranged in the third mounting cavity.

Optionally, the control assembly further comprises a wireless charging coil electrically connected to the main control board, and the wireless charging coil is arranged near a bottom of the electric toothbrush handle.

Optionally, the electric toothbrush handle further comprises an elastic abutment member, the elastic abutment member is arranged at a bottom of the mounting frame, one side of the elastic abutment member abuts against the mounting frame, and the other side abuts against the wireless charging coil.

Optionally, the elastic abutment member comprises an elastic portion and an abutment ring, the elastic portion comprises a transverse plate and two elastic side plates connected to two ends of the transverse plate respectively, the transverse plate abuts against the mounting frame, one end of each of the two elastic side plates far away from the transverse plate is fixed to each of two opposite sides of the abutment ring, and the abutment ring abuts against the wireless charging coil.

Optionally, the elastic side plate is made of a flexible material, and the elastic side plate is in a wave shape.

Optionally, the elastic abutment member further comprises at least one positioning shaft, the mounting frame is provided with a positioning groove matched with the positioning shaft, and the positioning shaft is located in the positioning groove.

Optionally, the first housing comprises a main housing and an end cover fixedly connected to the main housing, a fourth limiting boss is convexly provided in the end cover, and the wireless charging coil and the abutment ring are both sleeved outside the fourth limiting boss.

According to the technical solution of the present invention, one end of a drive rod extends into a mounting box from a first mounting hole and a second mounting hole, a first transmission arm is fixed on the drive rod, one end of the first transmission arm is hinged to a second transmission arm, the other end of the second transmission arm is hinged to a rotating member, wherein the rotating member comprises a main body and an eccentric shaft eccentrically arranged on the main body, the rotating member is hinged to the second transmission arm through the eccentric shaft, a drive motor is arranged in a first mounting cavity, the drive motor is in driving connection with the rotating member of a transmission mechanism through a third mounting hole so as to drive the rotating member to rotate, the drive rod can receive a stronger driving force through the matching use of the first transmission arm, the second transmission arm and the rotating member in the transmission mechanism, and further drive a brush head to reciprocate in a larger range, so that the brush head can penetrate deep between teeth and hard-to-reach areas for cleaning, which effectively improves the cleaning effect of the electric toothbrush.

DESCRIPTIONS OF REFERENCE NUMERALS

The realization of the objectives, the functional features, and the advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the drawings.

DETAILED DESCRIPTION OF EMBODIMENTS

The following clearly and completely describes the technical solutions in the embodiments of the present invention with reference to drawings in the embodiments of the present invention. It is clear that the described embodiments are merely a part rather than all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear) are involved in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationships, the motion situations and the like between individual components under a certain pose (as shown in the drawings), and if the certain pose is changed, the directional indications are changed accordingly.

In addition, if there are descriptions relating to “first”, “second” and the like in the embodiments of the present invention, the descriptions of “first”, “second” and the like are for descriptive purposes only and are not to be construed as indicating or implying relative importance thereof or implicitly indicating the quantities of the indicated technical features. Thus, a feature defined by “first” or “second” may explicitly or implicitly include at least one such feature. In addition, “and/or” appearing herein is meant to include three parallel solutions, and taking “A and/or B” as an example, it includes solution A, or solution B, or both solution A and solution B. In addition, the technical solutions among various embodiments may be combined with each other, however, this combination must be based on that it can be realized by those of ordinary skill in the art. When the combination of the technical solutions is contradictory or cannot be realized, such a combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The present invention provides an electric toothbrush handle.

In an embodiment of the present invention, as shown inFIGS.1to7, the electric toothbrush handle comprises:a first housing, wherein the first housing is provided with a first mounting cavity and a first mounting hole12communicated with the first mounting cavity;a drive rod20, wherein one end of the drive rod20extends into the first mounting cavity from the first mounting hole12;a transmission mechanism, wherein the transmission mechanism is arranged in the first mounting cavity, the transmission mechanism comprises a mounting box and a transmission assembly arranged in the mounting box, the mounting box is provided with a second mounting hole811corresponding to the first mounting hole12, the drive rod20extends into the mounting box from the second mounting hole811, the transmission assembly comprises a first transmission arm91fixed on the drive rod20, a second transmission arm92with one end hinged to the first transmission arm91and a rotating member94hinged to the other end of the second transmission arm92, the rotating member94comprises a main body941and an eccentric shaft942eccentrically arranged on the main body941, and the rotating member94is hinged to the second transmission arm92through the eccentric shaft942; anda drive motor60, wherein the drive motor60is arranged in the first mounting cavity, the mounting box is further provided with a third mounting hole812, and the drive motor60is in driving connection with the rotating member94of the transmission mechanism through the third mounting hole812.

In this embodiment, the first housing is the main body941of the electric toothbrush handle and has a first mounting cavity, wherein the mounting cavity is used to accommodate the transmission mechanism and the drive motor60. Meanwhile, the first housing is provided with a first mounting hole12communicated with the first mounting cavity and configured for the drive rod20to extend therein. Specifically, one end of the drive rod20extends into the first mounting cavity from the first mounting hole12for connecting to the transmission mechanism and transmitting a driving force of the motor to the brush head. It should be noted that the brush head of the electric toothbrush is fixed to a portion of the drive rod20located outside the first housing, so that the brush head swings with the rotation of the drive rod20.

The transmission mechanism, a core part of the present invention, is arranged in the first mounting cavity and is configured to transmit the driving force of the drive motor60, so as to drive the drive rod20to swing. Specifically, the transmission assembly is arranged in the mounting box, and the transmission assembly comprises a first transmission arm91fixed on the drive rod20, a second transmission arm92hinged to the first transmission arm91, and a rotating member94hinged to the other end of the second transmission arm92. The rotating member94comprises a main body941and an eccentric shaft942eccentrically arranged on the main body941, and is hinged to the second transmission arm92through the eccentric shaft942. When driven by the drive motor60, the rotating member94can, through the action of the eccentric shaft942, enable the second transmission arm92to swing in a larger range, thereby driving the first transmission arm91and the drive rod20to swing.

The drive motor60is a power component of the electric toothbrush handle, and is configured to provide power for the swing of the drive rod20. The drive motor60is arranged in the first mounting cavity, and is in driving connection with the rotating member94of the transmission mechanism through the third mounting hole812on the mounting box. When the drive motor60is started, the driving force of the drive motor60is transmitted to the transmission assembly through the rotating member94, thereby driving the drive rod20and the brush head to swing.

According to the technical solution of the present invention, one end of a drive rod20extends into a mounting box from a first mounting hole12and a second mounting hole811, a first transmission arm91is fixed on the drive rod20, one end of the first transmission arm91is hinged to a second transmission arm92, the other end of the second transmission arm92is hinged to a rotating member94, wherein the rotating member94comprises a main body941and an eccentric shaft942eccentrically arranged on the main body941, the rotating member94is hinged to the second transmission arm92through the eccentric shaft942, a drive motor60is arranged in a first mounting cavity, the drive motor60is in driving connection with the rotating member94of a transmission mechanism through a third mounting hole812so as to drive the rotating member94to rotate, the drive rod20can receive a stronger driving force through the matching use of the first transmission arm91, the second transmission arm92and the rotating member94in the transmission mechanism, and further drive a brush head to reciprocate in a larger range, so that the brush head can penetrate deep between teeth and hard-to-reach areas for cleaning, which effectively improves the cleaning effect of the electric toothbrush.

Further, as shown inFIGS.1to3and7, the transmission assembly further comprises a driving gear97, a tooth portion943meshing with the driving gear97is arranged on a periphery of the rotating member94, and the driving gear97is fixed on the drive shaft of the drive motor60. In this embodiment, the drive motor60transmits power through a gear. When the drive motor60is started, the drive shaft of the drive motor60drives the driving gear97fixed thereon to rotate. Since the tooth portion943of the driving gear97meshes with the tooth portion943on the periphery of the rotating member94, the rotation of the driving gear97directly drives the rotating member94to rotate. The eccentric shaft942of the rotating member94moves along with the rotation of the rotating member94, and then the drive rod20and the brush head swing under the hinging action of the second transmission arm92and the first transmission arm91. In this way, stable connection and efficient transmission between the transmission mechanism and the drive motor60are further ensured, and the working efficiency and the use experience of the electric toothbrush are effectively improved.

Further, as shown inFIGS.1,5and6, the mounting box comprises a second housing82and a sealing cover83matched with the second housing82, the rotating member94further comprises a first rotating shaft95and a second rotating shaft96that are coaxially arranged, the first rotating shaft95is fixed at one end of the eccentric shaft942far away from the main body941, the second rotating shaft96is fixed at one side of the main body941opposite to the eccentric shaft942, the sealing cover83and the second housing82are respectively provided with first limiting grooves84corresponding to the first rotating shaft95and the second rotating shaft96, and the first rotating shaft95and the second rotating shaft96are located in the first limiting grooves84. In this embodiment, the first rotating shaft95and the second rotating shaft96are fixed parts of the rotating member94, and are configured to prevent the rotating member94from moving in a horizontal direction and affecting the rotation stability of the rotating member94. The first rotating shaft95and the second rotating shaft96are both arranged on the central axis of the main body941and on opposite sides of the main body941. The first rotating shaft95and the eccentric shaft942are connected and fixed by a connecting structure. Meanwhile, the sealing cover83and the second housing82are provided with first limiting grooves84fixed to the first rotating shaft95and the second rotating shaft96, and the first rotating shaft95and the second rotating shaft96are located in the first limiting grooves84, thereby effectively maintaining the rotation stability of the rotating member94.

Further, as shown inFIGS.1to3, the second transmission arm92is shaped as an elongated arc. In this embodiment, in the transmission design of the electric toothbrush, the drive rod20and the transmission mechanism need to be closely matched to achieve efficient power transmission. However, if the transmission arm is not properly designed, it may interfere with the drive rod20and limit the swing range of the drive rod. In this embodiment, the second transmission arm92with a long arc shape is adopted, so that the movement track of the drive rod20can be skillfully avoided, thereby avoiding interference and ensuring that the drive rod20can freely and smoothly swing. Meanwhile, this arc design enables the second transmission arm92to generate a larger moment when driven, which not only helps to drive the rotating member94to rotate, but also further increases the swing range of the drive rod20. A wider swing range means the brush head can cover a wider area when brushing teeth, which improves cleaning effect.

Further, as shown inFIGS.1to3, the transmission assembly further comprises a third rotating shaft98, the second transmission arm92and the first transmission arm91are both provided with mounting grooves93, and two ends of the third rotating shaft98are respectively located in the mounting grooves93of the second transmission arm92and the first transmission arm91. In this embodiment, the third rotating shaft98is configured to connect the second transmission arm92and the first transmission arm91, so that the stability of transmission is enhanced, and the structure of the whole transmission assembly is more compact.

Further, as shown inFIGS.3and4, the first transmission arm91is provided with a fourth mounting hole911, a limiting block912is arranged in the fourth mounting hole911of the first transmission arm91, the drive rod20is provided with a second limiting groove21matched with the limiting block912, the drive rod20is fixed in the fourth mounting hole911, and the limiting block912is located in the second limiting groove21. In this embodiment, the fourth mounting hole911is configured to fix the drive rod20. Specifically, the drive rod20penetrates through the first mounting hole12, and meanwhile, the limiting block912is arranged in the first mounting hole12. An outer wall of the drive rod20is provided with the second limiting groove21, and the drive rod20and the first transmission arm91are effectively fixed by the mutual matching of the limiting block912and the second limiting groove21, so that the swing stability of the drive rod20is improved. It should be noted that the first transmission arm91is combined with the drive rod20by injection molding, so that the manufacturing process is simplified, and the production efficiency is improved. Meanwhile, the injection molding process can also ensure the strength and the durability of the connecting part, thereby prolonging the service life of the electric toothbrush.

Further, as shown inFIGS.5and6, a first limiting boss821used to limit the drive rod20is convexly provided in the second housing82, a third limiting groove822is formed at a top of the first limiting boss821, and an end portion of the drive rod20is located in the third limiting groove822. In this embodiment, the first limiting boss821is configured to better limit and fix the drive rod20, as so to ensure stability and accuracy of the drive rod during operation. Specifically, a third limiting groove822is formed on the top of the first limiting boss821, and an end portion of the drive rod20is located in the third limiting groove822, so that the drive rod20is effectively prevented from horizontally moving in the swinging process, which affects the operation stability of the electric toothbrush, and the stability and the accuracy of the electric toothbrush handle are effectively improved.

Further, as shown inFIGS.1and5, a second limiting boss831used to limit the drive rod20is provided on a periphery of the second mounting hole811of the sealing cover83, and the second mounting hole811penetrates through the second limiting boss831. In this embodiment, the second limiting boss831is configured to further limit and fix the drive rod20, so that the end portion of the drive rod20is limited by the first limiting boss821, the rod body of the drive rod20is limited by the second limiting boss831, and the stability of the operation of the electric toothbrush handle is effectively improved.

Further, as shown inFIG.1, the electric toothbrush handle further comprises a sealing rubber sleeve70, the sealing rubber sleeve70is arranged on an outer wall of the drive rod20, one end of the sealing rubber sleeve70abuts against the second limiting boss831, and the other end abuts against an inner wall of the first housing. In this embodiment, the sealing rubber sleeve70is configured to improve the overall waterproof and dustproof performance of the electric toothbrush. Specifically, the sealing rubber sleeve70is closely joined to the outer wall of the drive rod20. Meanwhile, one end of the sealing rubber sleeve70abuts against the top of the second limiting boss831, so that the second limiting boss831provides support for the sealing rubber sleeve70; the other end of the sealing rubber sleeve70abuts against the inner wall of the first housing, thereby effectively preventing the liquid from entering the first mounting cavity through the first mounting hole12during the cleaning process of the user, so that the waterproof and dustproof performance and stability of the electric toothbrush handle are effectively improved. In addition, the service life and the reliability of the product are improved, and better use experience is brought to the user.

Further, as shown inFIG.1, the electric toothbrush handle further comprises a tightening spring71, and the tightening spring71is sleeved on one end of the sealing rubber sleeve70far away from the second limiting boss831. In this embodiment, the tightening spring71is configured to further enhance the sealing performance of the electric toothbrush handle. The tightening spring71is sleeved on an outer wall of a sealing rubber strip and applies a continuous tightening force to the sealing rubber sleeve70, which ensures a close joint between the sealing rubber sleeve70and the drive rod20, and effectively prevents the sealing rubber sleeve70from sliding on the drive rod20. Therefore, the intrusion of foreign matter such as moisture and dust is further effectively prevented, and the sealing performance and stability of the electric toothbrush handle are enhanced.

Further, as shown inFIGS.1to3, a third limiting boss61adapted to the third mounting hole812is arranged on a periphery of a drive shaft of the drive motor60, and the third limiting boss61is located in the third mounting hole812. In this embodiment, the third limiting boss61is configured to improve the sealing performance of the mounting box. Since the transmission assemblies are all mechanical structures, in the transmission process, friction will occur between the components to transmit force. Therefore, lubricating oil will be filled in the mounting box to ensure the smooth operation of the transmission assemblies. Since the lubricating oil is liquid, it will overflow along the mounting hole; consequently, the stability of other structures of the electric toothbrush handle is affected. In this embodiment, a third limiting boss61is provided on a drive shaft bearing of the drive motor60. The third limiting boss61seals the third mounting hole812, thereby effectively preventing the leakage of lubricating oil, so that the structural stability of the electric toothbrush handle is effectively improved.

Further, as shown inFIG.1, the electric toothbrush handle further comprises a mounting frame30arranged in the first mounting cavity, a second mounting cavity31is formed in the mounting frame30, the drive motor60is arranged in the second mounting cavity31, and one end of the mounting frame30is fixedly connected to the mounting box. In this embodiment, the mounting frame30is used to provide a mounting position for other components of the electric toothbrush handle. The drive motor60is arranged in the second mounting cavity31, thereby effectively fixing the drive motor60, and meanwhile, the drive motor60is also protected. The mounting frame30can prevent direct impact and damage of external factors to the drive motor60, thereby improving the service life of the drive motor60. In addition, one end of the mounting frame30is fixedly connected to the mounting box through a buckle, so that the mounting frame30is stably connected to the mounting box.

Further, as shown inFIG.1, the electric toothbrush handle further comprises a control assembly arranged in the first mounting cavity, the control assembly comprises a main control board41electrically connected to the drive motor60and a battery42electrically connected to the main control board41, a third mounting cavity32is also formed in the mounting frame30, the main control board41is fixed to an outer wall of the mounting frame30, and the battery42is arranged in the third mounting cavity32. In this embodiment, the control assembly is configured to control the operation mode of the electric toothbrush handle. The main control board41is a control element, the battery42is configured to supply power to the drive motor60, and the third mounting cavity32is configured to fix the battery42, thereby improving the structural stability of the electric toothbrush handle.

Further, for example, the control assembly further comprises a wireless charging coil43electrically connected to the main control board41, and the wireless charging coil43is arranged near a bottom of the electric toothbrush handle and is configured to wirelessly charge the battery42.

Further, as shown inFIGS.1and8, the electric toothbrush handle further comprises an elastic abutment member50, the elastic abutment member50is arranged at a bottom of the mounting frame30, one side of the elastic abutment member50abuts against the mounting frame30, and the other side abuts against the wireless charging coil43. In this embodiment, the elastic abutment member50is configured to fix the wireless charging coil43. Specifically, one side of the elastic abutment member50abuts against the mounting frame30, and the other side abuts against the wireless charging coil43. Therefore, the wireless charging coil43is stably fixed at the bottom of the first housing, which effectively prevents the wireless charging coil43from being displaced due to external force, affecting the charging effect of the electric toothbrush handle, and the structural stability of the electric toothbrush handle is effectively improved. It should be noted that the elastic abutment member50is at least partially made of a flexible material or an elastic material, so as to provide a continuous pressing force to the wireless charging coil43.

Further, the elastic abutment member50comprises an elastic portion51and an abutment ring52, the elastic portion51comprises a transverse plate511and two elastic side plates512connected to two ends of the transverse plate511respectively, the transverse plate511abuts against the mounting frame30, one end of each of the two elastic side plates512far away from the transverse plate511is fixed to each of two opposite sides of the abutment ring52, and the abutment ring52abuts against the wireless charging coil43.

Further, the elastic side plate512is made of a flexible material, and the elastic side plate512is in a wave shape.

Further, the elastic abutment member50further comprises at least one positioning shaft (53), the mounting frame30is provided with a positioning groove matched with the positioning shaft (53), the positioning shaft (53) is located in the positioning groove, and the position of the elastic abutment member50on the mounting frame30can be ensured to be accurate through matching of the positioning shaft (53) and the positioning groove. The stable placement of the wireless charging coil43is facilitated, and the reduction of charging efficiency or charging failure caused by position deviation can also be avoided. Therefore, the stability and reliability of the wireless charging coil43are effectively improved.

Further, as shown inFIG.1, the first housing comprises a main housing13and an end cover14fixedly connected to the main housing13, a fourth limiting boss141is convexly provided in the end cover14, and the wireless charging coil43and the abutment ring52are both sleeved outside the fourth limiting boss141. In this embodiment, the first housing is composed of the main housing13and the end cap14fixedly connected thereto. A fourth limiting boss141is protruded from the inside of the end cover14. The fourth limiting boss141plays a supporting and positioning role, which ensures that the wireless charging coil43and the abutment ring52can be stably sleeved outside of the fourth limiting boss.

The above mentioned contents are only optional embodiments of the present invention and are not intended to limit the patent scope of the present invention, and under the inventive concept of the present invention, the equivalent structural transformations made by using the contents of the specification and the drawings of the present invention, or direct/indirect applications to other related technical fields, are all included in the patent protection scope of the present invention.