Electric toothbrush

Abstract

Disclosed in the present invention is an electric toothbrush. The electric toothbrush comprises a handle housing, a rear cover, and a frame. The frame is statically arranged in a handle accommodating cavity relative to the handle housing, and is provided with a battery receiving part. The electric toothbrush further comprises an electrical connection assembly having a support and an electrically conductive member mounted on the support. The electrical connection assembly is arranged adjacent to the battery receiving part of the frame, and is attached to the frame by means of a sliding mechanism. The sliding mechanism is configured to allow the electrical connection assembly to be slidable between a first position and a second position relative to the frame. In the first position, the electrically conductive member of the electrical connection assembly is located at one end of the battery receiving part to allow electrical connection. In the second position, the electrical connection assembly allows the electrically conductive member to move away from the battery receiving part, so as to form a passage allowing a battery to be mounted / dismounted relative to the battery receiving part. With the electric toothbrush according to the present invention, after the rechargeable battery is damaged or attenuated, a common consumer can conveniently replace the rechargeable battery without a specialized tool, so as to continue using the electric toothbrush.

Description

electric toothbrush Technical Field

[0001] The present invention relates to an electric toothbrush, and more particularly to an electric toothbrush with a replaceable battery. In addition, the present invention also relates to a power supply assembly suitable for the electric toothbrush. Background Art

[0002] Electric toothbrushes are widely used, and most commonly found on the market include rechargeable batteries. However, most rechargeable batteries are inconvenient to replace. The conductive components of existing electric toothbrushes' rechargeable batteries are electrically connected to the printed circuit board (PCB) via soldering. To replace the battery, one must use tools to remove the entire mechanism from the handle housing, then use a soldering iron to disconnect the battery from the PCBA. After removing the battery, the new battery is soldered to the PCBA using a soldering iron, and then the entire mechanism is reinstalled into the handle housing. This process is complex, and the mechanism also includes a transducer and switch mechanism. Removing and reinstalling the mechanism from the handle housing is a complex process, making it difficult for the average consumer to easily replace the battery. Professionals are usually required to perform the replacement to prevent degradation of the electric toothbrush's performance. In summary, these drawbacks of battery removal and replacement can lead consumers to forgo battery replacement, which is detrimental to environmental protection and a low-carbon approach.

[0003] Therefore, it is expected that there will be improvements to the electric toothbrush so that ordinary consumers can easily replace the rechargeable battery after the rechargeable battery is attenuated or damaged to continue using the electric toothbrush.

[0004] Summary of the Invention

[0005] In order to overcome the shortcomings of the existing technology, the present invention provides an electric toothbrush, comprising: a handle shell, a handle accommodating chamber is formed inside the handle shell, and an opening is formed at the rear end of the handle accommodating chamber; a back cover, which is detachably attached to the opening of the handle accommodating chamber, and a back cover accommodating chamber is formed inside the back cover; and a frame, which is stationarily arranged in the handle accommodating chamber relative to the handle shell, and has a battery receiving portion; wherein, it also includes an electrical connection assembly having a bracket and a conductive member mounted on the bracket, the electrical connection assembly is arranged adjacent to the battery receiving portion of the frame, and the electrical connection assembly is attached to the frame by a sliding mechanism, and the sliding mechanism is configured to allow the electrical connection assembly to slide relative to the frame between a first position and a second position, in the first position, the conductive member of the electrical connection assembly is located at one end of the battery receiving portion to allow electrical connection, and in the second position, the electrical connection assembly moves the conductive member away from the battery receiving portion to form a channel allowing the battery to be installed and removed relative to the battery receiving portion.

[0006] According to another aspect of the present invention, the electrical connection assembly further comprises a charging coil wound on the bracket, the charging coil can slide with the electrical connection assembly between a first position and a second position, and the battery receiving portion receives a rechargeable battery.

[0007] According to another aspect of the present invention, the electric toothbrush further comprises a PCB board mounted on the frame, wherein the PCB board forms a stop portion configured to abut the electrical connection assembly when the electrical connection assembly is in the second position to prevent it from being detached from the bracket.

[0008] According to another aspect of the present invention, the handle housing has an elongated cylindrical body with a longitudinal axis extending through the opening, and the sliding mechanism is configured to move the electrical connection assembly relative to the opening in a direction transverse to or perpendicular to the longitudinal axis.

[0009] According to another aspect of the present invention, the conductive member is fixedly connected to the PCB board or the motor via a flexible connecting wire, and the length of the flexible connecting wire is set to be sufficient to allow the electrical connection assembly to slide to the second position.

[0010] According to another aspect of the present invention, the electrical connection assembly protrudes from the opening of the handle housing, and the rear cover forms a rear cover accommodating cavity. When the rear cover is installed on the handle housing, the electrical connection assembly is accommodated in the rear cover accommodating cavity.

[0011] According to another aspect of the present invention, the sliding mechanism includes: a first sliding member, which is arranged on a bracket of the electrical connection assembly; and a second sliding member, which is arranged on a frame or a handle housing; the first sliding member and the second sliding member are arranged to allow the first sliding member and the second sliding member to slide relative to each other but prevent the electrical connection assembly and the frame from separating.

[0012] According to another aspect of the present invention, the electric toothbrush is provided with a stop portion, the stop portion being configured to limit movement of the sliding mechanism beyond the range of the first position and the second position, the stop portion being disposed on a bracket of the electrical connection assembly, a PCB board disposed on the frame, the frame, and / or the handle housing. Preferably, the stop portion includes: a first stop portion for limiting the first position, the first stop portion being disposed on the bracket and being stopped by the frame in the first position; and a second stop portion for limiting the second position, the second stop portion being disposed on the PCB board and being stopped by the bracket of the assembly in the second position.

[0013] According to another aspect of the present invention, a PCB board is provided on the frame, and the sliding mechanism is configured to move radially toward a side where the PCB board is provided to the second position.

[0014] According to another aspect of the present invention, an electric toothbrush includes a rechargeable battery and a charging coil. The charging coil is wound on a frame, and the inner diameter of the charging coil is larger than the outer diameter of the battery.

[0015] When the rechargeable battery of the electric toothbrush according to the present invention is damaged or decayed, ordinary consumers can conveniently replace the rechargeable battery without special tools to continue using the electric toothbrush. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] For a more complete understanding of the present invention, reference may be made to the following description of exemplary embodiments considered in conjunction with the accompanying drawings, in which:

[0017] FIG1 shows a perspective view of an electric toothbrush according to a preferred embodiment of the present invention.

[0018] FIG2 shows a perspective view of a partial internal structure of an electric toothbrush according to a preferred embodiment of the present invention.

[0019] FIG3 shows another perspective view of a partial internal structure of an electric toothbrush according to a preferred embodiment of the present invention.

[0020] FIG4 shows a perspective view of a rear cover of an electric toothbrush according to a preferred embodiment of the present invention.

[0021] FIG5 shows a perspective view of the rear cover and the handle housing of the electric toothbrush according to a preferred embodiment of the present invention, wherein the handle housing is cut away.

[0022] FIG6 shows a partial perspective view of a frame assembly in an electric toothbrush according to a preferred embodiment of the present invention.

[0023] FIG7 shows a perspective view of an electrical connection assembly of an electric toothbrush according to a preferred embodiment of the present invention.

[0024] FIG8 shows a partially cutaway perspective view of a frame of an electric toothbrush according to a preferred embodiment of the present invention.

[0025] FIG9 shows a perspective view of a housing assembly in an electric toothbrush according to a preferred embodiment of the present invention, wherein the electrical connection assembly slides to an open position.

[0026] 10 shows an end view of the electric toothbrush according to a preferred embodiment of the present invention with the rear cover open and the electrical connection assembly slid to the open position.

[0027] FIG11 shows a perspective view of the housing assembly of the electric toothbrush according to a preferred embodiment of the present invention from another perspective, wherein the electrical connection assembly slides to an open position.

[0028] FIG12 shows a perspective view of the housing assembly in the electric toothbrush according to a preferred embodiment of the present invention from another perspective, wherein the electrical connection assembly slides to the open position.

[0029] Reference Signs List

[0030] 100 electric toothbrush

[0031] 1 Handle housing

[0032] 11 Handle compartment

[0033] 12 Protrusion inside the handle housing

[0034] 2 Back cover

[0035] 21 Cantilever

[0036] 22 Back cover cavity

[0037] 3 toothbrush heads

[0038] 4 racks

[0039] 41 Rack protrusion

[0040] 45 V-shaped protrusion

[0041] 47 Frame stop groove

[0042] 5 PCB board

[0043] 51 PCB protrusion

[0044] 6 Electrical connection components

[0045] 61 bracket

[0046] 62 conductive parts

[0047] 621 connecting cable

[0048] 63 Charging Coil

[0049] 631 Charging coil lead

[0050] 66 V-shaped slot

[0051] 67 Stop Block

[0052] 7 Rechargeable batteries

[0053] 9 Switchgear

[0054] L longitudinal axis DETAILED DESCRIPTION

[0055] The present invention is further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can obviously be implemented in a variety of other ways different from the description herein. Those skilled in the art can make similar generalizations and deductions based on actual application situations without violating the connotation of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0056] In the following description, “front” generally refers to a side or direction of the electric toothbrush 100 close to the toothbrush head, and “rear” generally refers to a side or direction of the electric toothbrush 100 far from the toothbrush head.

[0057] Figure 1 shows a perspective view of an electric toothbrush 100 according to a preferred embodiment of the present invention. As shown in Figure 1 , electric toothbrush 100 comprises a handle and a toothbrush head 3, which is replaceably connected to a drive shaft within the handle. The handle internally houses a drive mechanism for driving the toothbrush head 3, a power supply assembly for supplying power to the drive mechanism, and a control device. The drive mechanism typically includes a motor, a transducer, and other components.

[0058] The handle portion has an elongated, generally cylindrical outer profile. It includes a handle housing 1 and a rear cover 2. The handle housing 1 defines a handle accommodating cavity 11, with an opening at its rear end. The rear cover 2 defines a rear cover accommodating cavity 22. When the handle housing 1 and rear cover 2 are attached together, the handle accommodating cavity 11 and the rear cover accommodating cavity 22 communicate, forming the entire accommodating cavity of the handle portion.

[0059] The rear cover 2 is typically removably attached to the opening at the rear end of the handle housing 1 by means of a snap-on or threaded connection, forming a watertight, sealed connection. In this embodiment, as shown in Figures 4 and 5, the rear cover 2 is provided with two cantilevers 21, which are arranged spaced apart from each other near the inner side of the circumferential wall of the rear cover 2. The free ends of the cantilevers 21 are provided with hooks, and correspondingly, two matching grooves are formed on the inner surface of the rear end of the handle housing 1. Through the snap-on fit of the hooks and the grooves, the rear cover 2 can be locked into the opening of the handle housing 1, so that the rear cover 2 is constrained in the direction of the longitudinal axis L of the handle housing 1 of the electric toothbrush 100. By rotating the rear cover 2 relative to the handle housing 1, the two cantilevers 21 in the rear cover 2 can be disengaged from the grooves, thereby allowing the rear cover 2 to be removed relative to the handle housing 1.

[0060] In addition, the handle housing 1 is provided with a switch device 9 and several display components for switch operation and status indication.

[0061] Figure 2 shows the internal structure of the handle portion of the electric toothbrush 100 according to a preferred embodiment of the present invention, and Figure 3 shows the partial internal structure of the handle portion of the electric toothbrush 100 according to a preferred embodiment of the present invention, in which a portion of the frame 4 including the battery accommodating portion and the electrical connection assembly 6 located at the rear end of the frame 4 for electrical connection of the battery accommodating portion are particularly enlarged.

[0062] As shown in Figures 2 and 3, a frame 4 is disposed within the housing cavity of the handle portion of the electric toothbrush 100. The frame 4 is stationary within the handle housing 1. A frame protrusion 41 is provided on the frame 4, and correspondingly, an inner protrusion 12 is provided within the handle housing 1. When the frame 4 is installed within the handle housing 1, the frame protrusion 41 on the frame 4 is restrained by the inner protrusion 12, thereby constraining the frame 4 within the handle housing 1 and preventing it from moving rearward away from the toothbrush head 3.

[0063] The chassis 4 has a battery receptacle for holding the battery 7 in place (see Figure 12). The battery receptacle is located in the portion of the chassis 4 closest to the rear cover 2. In the preferred embodiment, the battery receptacle is a rechargeable battery 7, but it should be understood that the rechargeable battery 7 can also be replaced with a non-rechargeable battery. In addition to the battery 7, the chassis 4 is also configured to hold other components, such as a PCB 5, a motor, and a transducer. As shown in Figure 3, at least one PCB 5 is attached to the outer surface of a side wall of the battery receptacle, for example, using screw fasteners.

[0064] According to the present invention, in particular, the electric toothbrush 100 is further provided with an electrical connection assembly 6 inside its handle portion. Along the direction of the longitudinal axis L of the handle portion extending through the rear end opening of the handle housing 1 in Figures 1 and 2, the electrical connection assembly 6 is arranged adjacent to the end of the battery receiving portion close to the rear cover 2. The electrical connection assembly 6 mainly includes a bracket 61 and a plate-shaped conductive member 62 mounted on the bracket 61. As shown in Figure 7, the conductive member 62 is retained at one side end of the bracket 61 close to the frame 4 by, for example, a slot structure. Preferably, the conductive member 62 is stamped from sheet-like conductive metal, and a protrusion is formed in the approximate middle position toward the direction of the rechargeable battery 7 to provide a more reliable electrical connection. When the electric toothbrush 100 is installed, the plate-shaped conductive member 62 is located at one end of the battery receiving portion close to the rear cover 2, and the protrusion of the conductive plate 62 abuts against an electrode portion of the battery 7 located in the battery receiving portion to achieve electrical connection.

[0065] Another conductive member is provided at the opposite end of the battery receiving portion, electrically connecting to the other electrode of the battery 7, thereby enabling power supply and charging of the battery. The conductive member at the end of the battery receiving portion, distal from the rear cover 2, is fixed, i.e., disposed on the chassis 4 and electrically connected to the PCB 5 in a fixed manner, for example, by welding. Typically, this conductive member is a coil spring.

[0066] The electrical connection assembly 6 also includes a charging coil 63 wound around the bracket 61. This charging coil 63 is used to charge the rechargeable battery 7 and moves with the bracket 61 relative to the chassis 4. Specifically, the charging coil 63 is wound around one end of the bracket 61, adjacent to the rear cover 2, to generate an induced current. The bracket 61 is integrally formed with two flanges, separated by a distance, between which the charging coil 63 is wound and retained. As shown in Figure 6, two leads 631 extend from the charging coil 63, which are electrically connected to the PCB 5. In a preferred embodiment, the ends of the coil leads 631 are soldered to the PCB 5. The leads 631 of the charging coil 63 should be sufficiently long to remain unaffected by the sliding movement of the assembly 6 and to prevent the soldered ends of the coil leads 631 from being negatively affected by stress.

[0067] As shown in Figures 6 and 9, the electrical connection assembly 6 is attached to the rear end of the housing 4 via a sliding mechanism. The sliding member is configured to allow the electrical connection assembly 6 to slide between a connected position and an open position relative to the housing 4. Figure 6 shows the connected position (first position), in which the conductive member 62 of the electrical connection assembly 6 is located at one end of the battery receiving portion and abuts against the electrode portion of the battery 7. Figure 9 shows the open position (second position), in which the electrical connection assembly 6, with the conductive member 62, is moved away from the battery receiving portion to form a passageway that allows the battery 7 to be installed and removed from the battery receiving portion.

[0068] In a preferred embodiment, the sliding mechanism primarily comprises a first sliding member integrally formed with the bracket 61 and a second sliding member integrally formed with the frame 4, with the first and second sliding members matching in shape. As shown in Figure 7, the first sliding member on the bracket 61 is configured as a V-shaped slot 66 with a V-shaped cross-section. Two slots 66 are arranged in pairs, parallel to each other, on either side of a flange portion of the bracket 61. As viewed from the longitudinal axis L in Figure 10, the paired first sliding members are positioned radially outward from the battery. Correspondingly, at the rear end of the frame, strip-shaped V-shaped projections 45 are provided along the rear ends of two parallel, spaced-apart sidewalls of the battery receiving portion. The V-shaped projections 45 are matingly connected to the V-shaped slots 66. The V-shaped projections 45 and the V-shaped slots 66 extend a predetermined length perpendicular to the longitudinal axis of the handle housing 1, allowing the electrical connector assembly 6 to move radially relative to the frame 4 relative to the battery 7 and creating a fully accessible access for battery installation and removal. At the same time, the matching shapes of the protrusion 45 and the slot 66 are set to always keep the electrical connection assembly 6 and the frame 4 attached during the sliding process of the two, and the assembly 6 and the frame 4 will not separate along the longitudinal axis L direction.

[0069] It should be understood that the cooperating sliding members of the sliding mechanism may also form other cooperating shapes. In other alternative embodiments, only one sliding mechanism may be provided, disposed on one radial side of the battery. Furthermore, a second sliding member of the sliding mechanism may be integrally disposed within the rear end opening of the handle housing 1 to allow the electrical connection assembly to slide relative to the opening, thereby forming a passage for installing and removing the battery 7.

[0070] Furthermore, to limit the range of movement of the sliding mechanism, a stopper is provided in the handle portion to prevent the sliding mechanism from sliding beyond the range defined by the first and second positions. Since the coil 63 and conductive member 64 of the electrical connection assembly 6 are soldered to the PCB 5 via flexible electrical cables, movement of the sliding mechanism beyond either the first or second position could damage the soldered connections, a factor that should be avoided.

[0071] To this end, in a preferred embodiment, protrusions 51 are provided on the PCB 5 as stops to restrict the second position. Preferably, these protrusions 51 are arranged in pairs. As shown in Figure 9, the protrusions 51 extend from the rear edge of the PCB 5 facing the rear cover 2 toward the electrical connection assembly 6. Corresponding recesses are provided on the bracket 61 to accommodate the protrusions 51 on the PCB 5. When the electrical connection assembly 6 moves to the second position, the protrusions 51 abut against the stop on the bracket 61 of the electrical connection assembly 6 in the sliding direction, thereby restricting the electrical connection assembly 6 from sliding beyond the second position.

[0072] Furthermore, two stops 67 are provided on the bracket 61 of the electrical connection assembly 6, acting as retaining members for limiting the first position. The stops 67 are positioned adjacent to the two V-shaped slots 66. Preferably, the slots 66 and stops 67 are integrally formed with the bracket 61. When the electrical connection assembly 6 slides to the first position, the stops 67 abut against the frame retaining grooves 47 on the frame 4 or the PCB 5 on the frame 4, thereby securing the electrical connection assembly 6 in a position where the conductive member 62 can abut against the battery 7.

[0073] It should be understood that in other alternative embodiments, the stop portion can be set at other positions. For example, the stop portion that limits the end position of the travel of both ends of the sliding mechanism can be set on the frame 4, or on the bracket 61 of the electrical connection component 6. In some other embodiments, it can also be set to be integrally formed on the inner side of the handle housing 1.

[0074] Furthermore, to minimize the impact of the electrical connection assembly 6 sliding to the second position shown in Figures 9 and 10 on the connection between the lead wire 631 of the coil 63 and the flexible connection wire 621 of the conductive member 62 on the PCB board 5, in this embodiment, the sliding mechanism is configured to move radially toward the side where the PCB board 5 is located to the second position. However, it should be understood that other sliding directions are also possible, such as a sliding direction of the sliding mechanism parallel to the plane of the PCB board 5 on a side wall of the battery accommodating portion.

[0075] To allow the electrical connection assembly 6 to extend to the open position in the radial direction relative to the handle portion, the electrical connection assembly 6, including the sliding mechanism, is arranged to protrude from the rear end opening of the handle housing 1. That is, as shown in FIG2 , when the rear cover 2 is mounted on the handle housing 1, the electrical connection assembly 6 is at least partially accommodated in the rear cover accommodating cavity 22 when viewed in the direction of the longitudinal axis of the handle portion.

[0076] According to the first embodiment, the disassembly process of the rechargeable battery 7 is as follows.

[0077] First, the rear cover 2 is rotated relative to the handle housing 1 and removed, exposing the rear opening of the handle housing 1. At this point, at least a portion of the electrical connection assembly 6 is exposed behind the rear opening. Subsequently, the electrical connection assembly 6 is moved radially relative to the handle housing 1 to a second, open position using a sliding mechanism, allowing access to the battery 7, as shown in FIG10 . This allows the rechargeable battery 7 to be removed along the longitudinal axis L of the electric toothbrush 100. A new rechargeable battery 7 is then inserted, and the electrical connection assembly 6 is slid in the opposite direction to the first, connected position. The rear cover 2 is then locked, completing the replacement of the battery 7. Because the charging coil 63 and conductive member 62 soldered to the PCB 5 are each provided with leads 631 or connecting wires 621 of sufficient length, when the assembly 6 is slid to the open position, as shown in FIG9 , the charging coil 63 and conductive member 62 maintain electrical connection to the PCB 5, maintaining the original fixed electrical connection. This makes replacement of the rechargeable battery 7 in the electric toothbrush 100 simple and reliable.

[0078] The present invention may also have other variations. In an alternative embodiment, the electrical connection assembly 6 does not include a charging coil. Instead, the charging coil is wound on the frame 4, typically adjacent to the rear cover 2, and the inner diameter of the charging coil (i.e., the diameter of the hollow portion) is larger than the outer diameter of the rechargeable battery 7. The electrical connection assembly only includes a bracket and a conductive member for abutting the electrode portion of the rechargeable battery. The assembly is slidably attached to the rear end of the frame 4. In this way, the assembly drives the conductive member to slide to an open position to expose the battery installation and removal channel, so that the rechargeable battery can be removed from the handle housing 1 through the hollow portion of the charging coil. During this process, the conductive member always maintains an electrical connection with the PCB board through a flexible connecting line.

[0079] The above embodiments are all described in conjunction with rechargeable batteries. It should be understood that the above solutions can also be applied to non-rechargeable batteries. When non-rechargeable batteries are used, the charging coil can be omitted.

[0080] In the above embodiment, a PCB board 5 is provided on the frame 4, for example, by a threaded connection, and the conductive members at both ends of the battery accommodating portion are welded to the PCB board. However, in other alternative embodiments, the conductive members may also be directly electrically connected to the motor provided in the handle portion.

[0081] When the rechargeable battery of the electric toothbrush according to the present invention is damaged or decayed, ordinary consumers can conveniently replace the rechargeable battery without special tools to continue using the electric toothbrush.

[0082] Although the present invention is disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art may make possible changes and modifications without departing from the spirit and scope of the present invention. Therefore, any modifications, equivalent variations, and modifications made to the above embodiments in accordance with the technical essence of the present invention without departing from the content of the technical solution of the present invention shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. An electric toothbrush comprising: A handle housing, wherein a handle accommodating cavity is formed inside the handle housing, and an opening is formed at the rear end of the handle accommodating cavity; a rear cover, the rear cover being detachably attached to the opening of the handle receiving cavity, and a rear cover receiving cavity being formed inside the rear cover; as well as A frame, the frame being statically arranged in the handle accommodating cavity relative to the handle housing, the frame having a battery receiving portion; It is characterized in that The electric toothbrush further comprises an electrical connection assembly having a bracket and a conductive member mounted on the bracket, the electrical connection assembly being arranged adjacent to the battery receiving portion of the frame, and the electrical connection assembly being attached to the frame via a sliding mechanism, The sliding mechanism is configured to allow the electrical connection assembly to slide between a first position and a second position relative to the frame, wherein in the first position, the conductive member of the electrical connection assembly is located at one end of the battery receiving portion to allow electrical connection, and in the second position, the electrical connection assembly moves the conductive member away from the battery receiving portion to form a channel that allows the battery to be installed and removed relative to the battery receiving portion.

2. The electric toothbrush according to claim 1, characterized in that The electrical connection assembly further comprises a charging coil wound on the bracket, and the charging coil can slide between the first position and the second position along with the electrical connection assembly. The battery receiving portion receives the rechargeable battery.

3. The electric toothbrush according to claim 2, characterized in that A PCB board is arranged on the frame, and leads of the charging coil are welded to the PCB board. The length of the leads is set to be sufficient to allow the electrical connection assembly to slide to the second position.

4. The electric toothbrush according to claim 1, characterized in that The electrical connection assembly protrudes from the opening of the handle housing. The rear cover forms a rear cover accommodating cavity. When the rear cover is mounted on the handle housing, the electrical connection assembly is accommodated in the rear cover accommodating cavity.

5. The electric toothbrush according to claim 1 or 2, characterized in that: The handle housing has an elongated cylindrical body with a longitudinal axis extending through the opening, The sliding mechanism is configured to move the electrical connection assembly relative to the battery receiving portion in a direction transverse to or perpendicular to the longitudinal axis.

6. The electric toothbrush according to claim 1, characterized in that The conductive member is fixedly connected to the PCB board or the motor via a flexible connecting wire, and the length of the flexible connecting wire is set to be sufficient to allow the electrical connection assembly to slide to the second position.

7. The electric toothbrush according to claim 1, characterized in that The sliding mechanism comprises: a first sliding member, the first sliding member being disposed on the bracket of the electrical connection assembly; and a second sliding member, the second sliding member being disposed on the frame or the handle housing; The matching shapes of the first slide member and the second slide member are configured to allow the first slide member and the second slide member to slide relative to each other but prevent the electrical connection assembly from being separated from the frame.

8. The electric toothbrush according to claim 1 or 7, characterized in that: The electric toothbrush is provided with a stopper, the stopper being configured to limit the sliding mechanism from moving beyond the range of the first position and the second position, the stopper being provided in one or two of the following positions: on the bracket of the electrical connection assembly; On a PCB board on the frame; on said frame; and on the handle housing.

9. The electric toothbrush according to claim 8, characterized in that The stopper comprises: a first stopper for limiting a first position, wherein the first stopper is disposed on the bracket and is stopped by the frame at the first position; and A second stop portion for limiting a second position, wherein the second stop portion is disposed on the PCB board, and when in the second position, the second stop portion is stopped by the bracket of the component.

10. The electric toothbrush according to claim 1, characterized in that: The electric toothbrush comprises a rechargeable battery, the charging coil is wound on the frame, and the inner diameter of the charging coil is greater than the outer diameter of the battery.

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