CN210056312U

CN210056312U - Electric toothbrush of oral cavity sight glass

Info

Publication number: CN210056312U
Application number: CN201920482351.9U
Authority: CN
Inventors: 陈柱根
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-02-14
Anticipated expiration: 2029-04-11

Abstract

The utility model discloses an oral cavity speculum electric toothbrush, which comprises a handle, a brush head and an oral cavity speculum assembly, wherein a power supply and a motor are arranged in the handle; the brush head and the oral cavity sight glass component are separately and detachably arranged on the handle, wherein the brush head is mechanically connected with the electric motor when in work, and the oral cavity sight glass component is electrically connected with the power supply when in work. Through setting up brush head and oral cavity speculum subassembly into equal independent detachably and installing on the handle to the brush head of assurance and the independence of oral cavity speculum subassembly, compare with current with endoscope head setting on the plug (camera is installed on electric toothbrush handle promptly) technique, this oral cavity speculum electric toothbrush has avoided the brush head during operation, drives the vibration of oral cavity speculum subassembly and leads to the not hard up scheduling problem of oral cavity speculum subassembly circuit, thereby has improved the functional stability of product, has improved the life of oral cavity speculum subassembly.

Description

Electric toothbrush of oral cavity sight glass

Technical Field

The utility model belongs to the technical field of articles for daily use, in particular to an electric toothbrush of an oral cavity sight glass.

Background

The oral endoscopes on the market are mainly divided into two types: one is a stand alone individual product and the other is integral with the electric toothbrush and not separable. The first medium-high grade is expensive, the second low grade is inconvenient to carry, most of the electric toothbrush needs to be matched with a computer or a special display screen for checking, only a small part of the electric toothbrush is provided with a battery, the WIFI of the port endoscope can be directly connected with a mobile phone for opening the APP for checking, and if a user buys the electric toothbrush and simultaneously wants to check teeth, the user needs to go to another platform to buy the oral endoscope; the second oral cavity endoscope and the electric toothbrush are integrated into a whole and divided into four types:

1) the camera is placed on the back of the brush head, so that a user can conveniently check teeth, and the service life is short (the camera is integrated with the brush hair, and the camera is easily damaged by vibration of the brush head when the toothbrush is used; completely cleaning the window foam of the camera);

2) the camera is arranged on the handle, and the diameter of the handle is large, so that the camera is not suitable for being placed in an oral cavity to be checked, is extremely inconvenient and is easy to have dead corners.

3) The camera is integrated on the motor rotor mandrel, and this kind of form, the structure is complicated, and is with high costs, and finished product stability is not high, shakes easily and shakes the camera bad during the tooth brushing.

4) The camera is integrated on the handle plug, and the motor is inlayed to brush inside, and this kind of form brush head is the consumptive material, and the cost is higher, and production technology is complicated, and the structure is complicated, and the cost of maintenance of after-sale maintenance is high.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

In order to solve the above problems, the utility model provides an oral cavity speculum electric toothbrush, which can effectively improve the functional stability of the product so as to prolong the service life of the product, and comprehensively reduce the purchase cost of users and the after-sale maintenance cost of the product.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: an electric toothbrush with an oral cavity speculum comprises a handle, a brush head and an oral cavity speculum assembly, wherein a power supply and a motor are arranged in the handle; the brush head and the oral cavity sight glass component are separately and detachably arranged on the handle, wherein the brush head is mechanically connected with the electric motor when in work, and the oral cavity sight glass component is electrically connected with the power supply when in work.

Preferably, oral cavity speculum subassembly includes oral cavity speculum handle, first connecting piece and camera subassembly, and the camera subassembly sets up in oral cavity speculum handle upper portion, and first connecting piece is fixed in oral cavity speculum handle bottom, and first connecting piece axial is equipped with first fixed slot, and the motor includes motor stator and rotor dabber, and inside the motor stator is fixed in the handle, and the rotor dabber stretches out handle upper portion, and first connecting piece realizes dismantling through first fixed slot and rotor dabber and is connected.

Preferably, rotor dabber upper portion is equipped with first locating plane, and first fixed slot is equipped with the second locating plane of laminating mutually with first locating plane.

Preferably, the bottom of the first connecting piece is provided with a first conductive contact electrically connected with the camera assembly, the upper part of the handle is provided with a second conductive contact electrically connected with the power supply, and when the first connecting piece is connected with the rotor mandrel, the first conductive contact and the second conductive contact are communicated so that the camera assembly is electrified with the power supply.

Preferably, a first control board used for controlling the camera assembly to work is arranged in the oral speculum handle, the first control board is electrically connected with the first conductive contact, a second control board used for controlling the motor to work is arranged in the handle, the second control board is electrically connected with the power supply and the second conductive contact, and when the first connecting piece is mechanically connected with the rotor mandrel, the first conductive contact and the second conductive contact are communicated so that the first control board is electrified with the power supply.

Preferably, the handle is further provided with a shooting key for controlling the camera assembly, the shooting key is electrically connected with the second control panel, the second conductive contact comprises three male pins which are connected with the positive pole of the power supply, are grounded and are connected with a shooting signal, the first conductive contact is provided with three female sockets which are correspondingly arranged with the three male pins of the second conductive contact, and the on-off instruction of the shooting key is butted with the female sockets through the male pins and the female sockets which are used for conducting the shooting signal to realize the shooting control of the first control panel.

Preferably, the brush head includes the brush head handle, brush and second connecting piece, the brush sets up in brush head handle upper portion, the second connecting piece is connected in brush head handle lower part, second connecting piece axial is equipped with the second fixed slot, be equipped with buckle spare in the second fixed slot, buckle spare is the elasticity material, the motor includes motor stator and rotor mandrel, motor stator is fixed in inside the handle, the rotor mandrel stretches out handle upper portion, the rotor mandrel is equipped with the draw-in groove, the rotor mandrel stretches into in the second fixed slot and realizes the buckle through buckle spare and draw-in groove joint and be connected.

Preferably, the side wall of the second connecting piece is provided with at least one window, the window is communicated with the second fixing groove, one end of the clamping piece is connected with the upper end of the window, the other end of the clamping piece extends downwards along the axis direction, the bottom of the clamping piece is provided with a protruding part protruding outwards towards the second fixing groove, and when the rotor mandrel extends into the second fixing groove, the protruding part is clamped with the clamping groove.

Preferably, the upper side surface and the lower side surface of the protruding part are inclined surfaces towards the middle, and the cross section of the clamping groove is matched with the shape of the protruding part.

(III) advantageous effects

Compared with the prior art, the beneficial effects of the utility model are that:

on one hand, the brush head and the oral cavity speculum assembly are arranged to be detachably arranged on the handle independently, so that the independence of the brush head and the oral cavity speculum assembly is ensured, compared with the prior art that the endoscope head is arranged on the plug (namely the camera head is arranged on the electric toothbrush handle), the electric toothbrush of the oral cavity speculum avoids the problems that the circuit of the oral cavity speculum assembly is loosened and the like due to the fact that the oral cavity speculum assembly is driven to vibrate when the brush head works, thereby improving the functional stability of a product, and prolonging the service life of the oral cavity speculum assembly, on the other hand, because the brush head needs to be frequently replaced, the electric toothbrush belongs to consumable material, compared with the prior art that the camera head is arranged on the handle plug and the motor is arranged on the brush head, the technical scheme can reduce the manufacturing cost of the brush head, thereby integrally reducing the purchase cost of a user, and also avoiding the problem of motor, meanwhile, the handle, the brush head and the oral cavity speculum component are arranged in a modularized mode, when a product breaks down, the broken module can be maintained or replaced, and therefore the oral cavity speculum electric toothbrush reduces maintenance cost in after-sale maintenance.

Drawings

The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention,

in the drawings:

fig. 1 shows a schematic overall structure diagram of an embodiment of the present invention;

FIG. 2 shows a partial enlarged view of A in FIG. 1;

FIG. 3 shows an exploded view of an oral scope assembly;

FIG. 4 is a schematic structural view of the first connector of FIG. 3;

FIG. 5 shows a cross-sectional view of FIG. 4;

FIG. 6 shows an exploded view of the brush head;

FIG. 7 shows a schematic structural view of the second connector of FIG. 6;

FIG. 8 shows a cross-sectional view of FIG. 7;

fig. 9 shows an exploded view of the handle and its internal mechanism.

In the figure: 1 handle, 10 rotor spindles, 100 clamping grooves, 11 second conductive contacts, 12 shooting keys, 13 motor keys, 14 power supplies, 15 second control plates, 101 first positioning planes, 2 brush heads, 20 brush head handles, 21 brushes, 22 second connecting pieces, 220 second fixing grooves, 221 buckling pieces, 2210 protrusions, 222 windows, 3 oral cavity endoscope components, 30 oral cavity endoscope handles, 31 first connecting pieces, 310 first fixing grooves, 3100 second positioning planes, 32 camera components, 33 first conductive contacts and 34 first control plates.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to the attached drawings 1-9, the utility model discloses an oral cavity speculum electric toothbrush, which comprises a handle 1, a brush head 2 and an oral cavity speculum assembly 3, wherein a power supply 14 and a motor are arranged in the handle 1, the brush head 2 and the oral cavity speculum assembly 3 are separately and detachably arranged on the handle 1, the brush head 2 is in driving connection with the motor when working, and the oral cavity speculum assembly 3 is in electric connection with the power supply 14 when working; specifically, brush head 2 during operation,

brush head

2 and 1 mechanical connection of handle, motor drive brush head 2 vibration to realize the clear function in oral cavity, 3 during operation of oral cavity speculum subassembly, will brush head 2 and dismantle from handle 1, and be connected to handle 1 with oral cavity speculum subassembly 3 on, power supply 14 supplies power for oral cavity speculum subassembly 3, and oral cavity speculum subassembly 3 observable is inside the oral cavity.

On one hand, because the brush head 2 and the oral cavity speculum assembly 3 are separately and detachably mounted on the handle 1, the independence of the brush head 2 and the oral cavity speculum assembly 3 is ensured, compared with the prior art that the endoscope head is arranged on the plug (namely the camera head is mounted on the handle of the electric toothbrush), the electric toothbrush of the oral cavity speculum avoids the problems that the brush head 2 drives the oral cavity speculum assembly 3 to vibrate to cause the circuit of the oral cavity speculum assembly 3 to be loosened and the like when in work, thereby improving the functional stability of the product and prolonging the service life of the oral cavity speculum assembly 3; on the other hand, the brush head 2 needs to be frequently replaced and belongs to consumable materials, compared with the prior art that the camera is arranged on the handle plug and the motor is arranged on the brush head, the technical scheme can reduce the manufacturing cost of the brush head, thereby reducing the overall purchase cost and avoiding the problem that the motor is wasted when the brush head is discarded; meanwhile, the handle 1, the brush head 2 and the oral cavity speculum assembly 3 are arranged in a modularized mode, when a product breaks down, the broken module can be maintained or replaced, and therefore the oral cavity speculum electric toothbrush also reduces maintenance cost in after-sale maintenance.

Specifically, referring to fig. 1 to 5, the oral cavity speculum assembly 3 includes an oral cavity speculum handle 30, a first connecting member 31 and a camera assembly 32, the camera assembly 32 is disposed on the upper portion of the oral cavity speculum handle 30, the first connecting member 31 is fixed on the bottom of the oral cavity speculum handle 30, the first connecting member 31 is axially provided with a first fixing groove 310, the motor includes a motor stator and a rotor spindle 10, the motor stator is fixed inside the handle 1, the rotor spindle 10 extends out of the upper portion of the handle 1, the first connecting member 31 is detachably connected with the rotor spindle 10 by the first fixing groove 310, thereby realizing the detachable connection of the oral cavity sight glass component 3 and the handle 1, of course, the oral cavity sight glass component 3 and the handle 1 can also realize the detachable connection through threaded connection, in order to facilitate and fast installation, in the embodiment, the oral cavity mirror assembly 3 and the handle 1 are detachably connected through the above-mentioned first fixing groove 310 and the rotor spindle 10.

Further, referring to fig. 1, fig. 2 and fig. 5, in order to facilitate positioning, the upper portion of the rotor core shaft 10 is provided with a first positioning plane 101, and the first fixing groove 310 is provided with a second positioning plane 3100 attached to the first positioning plane 101, so that a foolproof design can be implemented, and the rotor core shaft can be conveniently installed in place each time.

Specifically, referring to fig. 1 and fig. 2, a first conductive contact 33 electrically connected with the camera assembly 32 is arranged at the bottom of the first connecting member 31, a second conductive contact 11 electrically connected with a power supply is arranged at the upper part of the handle 1, when the first connecting member 31 is connected with the rotor core shaft 10, the first conductive contact 33 is communicated with the second conductive contact 11 to enable the camera assembly 32 to be electrically connected with the power supply 14, and the camera assembly 32 is electrically connected with the power supply 14 through the first conductive contact 33 and the second conductive contact 11, so that the camera assembly is convenient to detach and mount, on the other hand, the problem that the wire connection is easy to loosen can be avoided, mass production is easy, and after-sale maintenance cost is reduced.

In order to modularize the oral cavity speculum assembly 3 and facilitate the product development and serialization, the oral cavity speculum assembly 3 and the control circuit of the motor are independently arranged, specifically, a first control board 34 for controlling the operation of the camera assembly 32 is arranged in the oral cavity speculum handle 30, the first control board 34 is electrically connected with the first conductive contact 33, a second control board 15 for controlling the operation of the motor is arranged in the handle 1, the second control board 15 is electrically connected with the power supply 14 and the second conductive contact 11, when the first connecting piece 31 is connected with the rotor spindle 10, the first conductive contact 33 is communicated with the second conductive contact 11 to enable the first control board 34 to be electrically connected with the power supply 14, wherein the second control board 15 is electrically connected with the power supply 14, at this time, the second control board 15 serves as an electric connection medium of the power supply 14 and the first control board 34, so that the oral cavity speculum assembly 3 has the characteristic of being independent of the handle 1 and capable of independently operating after being connected with the power supply, the situation that the cleaning and shooting functions of the product are invalid after the second control board 15 of the oral speculum electric toothbrush is damaged is avoided, so that the loss of a user is reduced, and the after-sales cost of maintenance is reduced.

Further, for convenience of use, referring to fig. 1, a shooting key 12 for controlling the camera assembly 32 is further disposed on the handle 1, the shooting key 12 is electrically connected to the second control board 15, the first conductive contact 33 is a power-on female socket, the second conductive contact 11 is a power-on male socket, specifically, the second conductive contact 11 includes three male pins for conducting a power source anode, grounding and shooting signals, the first conductive contact 33 is provided with three female sockets corresponding to the three male pins of the second conductive contact 11, and an on-off command of the shooting key 12 is in signal connection with the camera assembly 32 through butt-joint of the male pins and the female sockets for conducting the shooting signals, so as to achieve shooting control of the first control board 34.

Certainly, the handle 1 is further provided with a motor button 13 for controlling the motor, and the motor button 13 is electrically connected with the second control board 15 to control the start and the stop of the motor.

Referring to fig. 1, fig. 2 and fig. 6 to fig. 8, the brush head 2 includes a brush head handle 20, a brush 21 and a second connecting member 22, the brush 21 is disposed on the upper portion of the brush head handle 20, the second connecting member 22 is connected to the lower portion of the brush head handle 20, the second connecting member 22 is axially provided with a second fixing groove 220, a fastening member 221 is disposed in the second fixing groove 220, the fastening member 221 is made of an elastic material, the motor includes a motor stator and a rotor spindle 10, the motor stator is fixed inside the handle 1, the rotor spindle 10 extends out of the upper portion of the handle 1, the rotor spindle 10 is provided with a fastening groove 100, the rotor spindle 10 extends into the second fixing groove 220 and is fastened with the fastening groove 100 through the fastening member, thereby realizing the detachable connection of the brush head 2 and the handle 1, of course, the brush head 2 and the handle 1 can also realize the detachable connection through the threaded connection, for convenient and fast installation, in this embodiment, the brush head 2 and the handle 1 are detachably connected by the above-mentioned snap connection. The locking member 221 may be a metal elastic sheet or a plastic member integrally formed with the second connecting member 22.

When the brush head 2 needs to be used, the brush head 2 is connected to the rotor mandrel 10 through the second connecting piece 22, and the motor drives the second connecting piece 22 to vibrate through the rotor mandrel 10, so that the brush is driven to vibrate, and the function that the brush head 2 is used for cleaning teeth is achieved.

Referring to fig. 2, 7 and 8, further, the fastening member 221 and the second connecting member 22 are made of a plastic material and are integrally formed, at least one window 222 is formed in a side wall of the second connecting member 22, the window 222 is communicated with the second fixing groove 220, one end of the fastening member 221 is connected to an upper end of the window 222, the other end of the fastening member extends downward along the axial direction, a protrusion 2210 protruding outward toward the second fixing groove is formed at the bottom of the fastening member 221, and when the rotor core shaft 10 extends into the second fixing groove 220, the protrusion 2210 is fastened to the fastening groove 100.

Further, referring to fig. 2 and 8, the upper and lower sides of the protrusion 2210 are inclined toward the middle, and the cross section of the locking groove 100 matches with the shape of the protrusion 2210 (i.e., is also provided as an inclined surface). Through the inclined plane setting of boss 2210 and draw-in groove 100, make things convenient for under the exogenic action, make boss 2210 slide in or roll-off draw-in groove 100 to convenient installation and dismantlement.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An oral cavity endoscope electric toothbrush comprises a handle (1), wherein a power supply (14) and a motor are arranged in the handle (1); the toothbrush is characterized by further comprising a brush head (2) and an oral cavity sight glass assembly (3), wherein the brush head (2) and the oral cavity sight glass assembly (3) are independently and detachably mounted on the handle (1), the brush head (2) is mechanically connected with a motor when working, and the oral cavity sight glass assembly (3) is electrically connected with a power supply (14) when working.

2. The electric toothbrush with the oral speculum according to the claim 1, wherein the oral speculum assembly (3) comprises an oral speculum handle (30), a first connecting piece (31) and a camera assembly (32), the camera assembly (32) is arranged on the upper portion of the oral speculum handle (30), the first connecting piece (31) is fixed on the bottom of the oral speculum handle (30), the first connecting piece (31) is axially provided with a first fixing groove (310), the motor comprises a motor stator and a rotor mandrel (10), the motor stator is fixed inside the handle (1), the rotor mandrel (10) extends out of the upper portion of the handle (1), and the first connecting piece (31) is detachably connected with the rotor mandrel (10) through the first fixing groove (310) in an opposite insertion mode.

3. The electric toothbrush according to claim 2, wherein a first positioning plane (101) is disposed on the upper portion of the rotor spindle (10), and a second positioning plane (3100) attached to the first positioning plane (101) is disposed on the first fixing groove (310).

4. The oral endoscope electric toothbrush is characterized in that a first conductive contact (33) electrically connected with the camera assembly (32) is arranged at the bottom of the first connecting piece (31), a second conductive contact (11) electrically connected with the power supply (14) is arranged at the upper part of the handle (1), and when the first connecting piece (31) is connected with the rotor mandrel (10), the first conductive contact (33) is communicated with the second conductive contact (11) so as to enable the camera assembly (32) to be electrified with the power supply (14).

5. An electric toothbrush with an oral cavity endoscope as claimed in claim 4, wherein a first control board (34) for controlling the operation of the camera assembly (32) is arranged in the handle (30), the first control board (34) is electrically connected with the first conductive contact (33), a second control board (15) for controlling the operation of the motor is arranged in the handle (1), the second control board (15) is electrically connected with the power supply (14) and the second conductive contact (11), when the first connecting piece (31) is mechanically connected with the rotor spindle (10), the first conductive contact (33) and the second conductive contact (11) are connected to electrify the first control board (34) and the power supply (14).

6. The electric toothbrush with the oral speculum according to the claim 5, wherein the handle (1) is further provided with a shooting button (12) for controlling the camera assembly (32), the shooting button (12) is electrically connected with the second control board (15), the second conductive contact (11) comprises three male pins for connecting the positive pole of the power supply, grounding and shooting signals, the first conductive contact (33) is provided with three female sockets corresponding to the three male pins of the second conductive contact (11), and the on-off command of the shooting button (12) realizes the shooting control of the first control board by the butt joint of the male pins and the female sockets for conducting the shooting signals.

7. An oral speculum electric toothbrush according to claim 1, wherein said brush head (2) comprises a brush head handle (20), a brush (21) and a second attachment (22), the brush (21) is arranged at the upper part of the brush head handle (20), the second connecting piece (22) is connected with the lower part of the brush head handle (20), a second fixing groove (220) is axially arranged on the second connecting piece (22), a buckle piece (221) is arranged in the second fixing groove (220), the fastener (221) is made of elastic material, the motor comprises a motor stator and a rotor mandrel (10), the motor stator is fixed inside the handle (1), the rotor mandrel (10) extends out of the upper part of the handle (1), the rotor core shaft (10) is provided with a clamping groove (100), and the rotor core shaft (10) extends into the second fixing groove (220) and is connected with the clamping groove (100) in a clamping mode through a clamping piece (221) in a clamping mode to achieve clamping connection.

8. The electric toothbrush with the oral cavity endoscope as claimed in claim 7, wherein the second connecting member (22) has at least one window (222) on a side wall thereof, the window (222) is connected to the second fixing groove (220), one end of the latch (221) is connected to the upper end of the window (222), the other end of the latch extends downward along the axial direction, a protrusion (2210) protruding outward toward the second fixing groove (220) is provided at the bottom of the latch (221), and when the rotor core shaft (10) extends into the second fixing groove (220), the protrusion (2210) is engaged with the engaging groove (100).

9. The electric toothbrush with an oral cavity endoscope as claimed in claim 8, wherein the upper and lower sides of the protrusion (2210) are inclined surfaces towards the middle, and the cross section of the slot (100) matches with the shape of the protrusion (2210).