WO2021073024A1

WO2021073024A1 - Oscillating electric toothbrush

Info

Publication number: WO2021073024A1
Application number: PCT/CN2020/076808
Authority: WO
Inventors: 郑云兵
Original assignee: 郑云兵
Priority date: 2019-10-17
Filing date: 2020-02-26
Publication date: 2021-04-22
Also published as: CN112674900A

Abstract

An electric toothbrush, composed of a toothbrush body (1) and a toothbrush head (2), the toothbrush head (2) being combined with the toothbrush body (1) by means of being connected to an oscillating rod (5); the toothbrush body (1) is composed of an outer shell (19), a battery (6), a circuit board (12), an electric motor (7), a crank mechanism, the oscillating rod (5), a fulcrum apparatus, and a transmission member (17); the motor (7) is rotated by means of the electric energy of the battery (6), and drives the oscillating rod (5) by means of the crank mechanism, and the oscillating rod (5) restores the planetary motion of the crank mechanism by means of the action of the fulcrum apparatus, such that the toothbrush head (2) also makes a planetary motion to clean the teeth.

Description

Swing electric toothbrush

Technical field

The invention relates to an electric toothbrush, which is a toothbrush with a large movement of the toothbrush head during operation.

Background technique

Currently known electric toothbrushes of this kind are mainly recognized as a rotary electric toothbrush. This rotary electric toothbrush is composed of a toothbrush main body and a toothbrush head. The toothbrush main body is composed of a housing, a motor, a transmission mechanism, a battery, and a control. The motor is connected to the transmission mechanism, and the battery is connected to the motor through the control module; the toothbrush head is composed of a convolute brush, a toothbrush arm and a linkage mechanism. The whirl brush and linkage mechanism are installed on the toothbrush arm, and the whirl brush is connected to the linkage mechanism. ; The toothbrush head is connected with the toothbrush main body by the toothbrush arm, and the rotating hair brush of the toothbrush head is connected with the transmission mechanism of the toothbrush main body through the linkage mechanism. In the existing revolving electric toothbrush, the rotating action of the motor passes through the transmission mechanism and then through the linkage mechanism, so that the revolving hair brush performs a revolving action to work. In order to support the smooth circling movement of the circumflex brush on the toothbrush arm, there is a large movable gap between the circumflex brush and the toothbrush arm. During use, the movable gap will be in the oral cavity, and the movable gap becomes a relatively large gap. Big health dead corner. It can be seen from the above that the existing rotary electric toothbrush has a complicated structure of the toothbrush head and a relatively large sanitary corner in the oral cavity during use.

technical problem

In order to overcome the disadvantages of the existing revolving electric toothbrushes that the structure of the toothbrush head is complicated and there are large sanitary corners, the present invention provides an electric toothbrush. The toothbrush head of the electric toothbrush has a simple structure and is not in use. Will be in a larger sanitary corner in the oral cavity.

Technical solutions

The technical solution adopted by the present invention to solve its technical problems is: the electric toothbrush is composed of a toothbrush head and a toothbrush main body, the toothbrush head is composed of toothbrush bristles fixed on the toothbrush arm, and the toothbrush main body is composed of a casing, a battery, a circuit board, a motor, a crank mechanism, It consists of a swing rod, a fulcrum device, a transmission part and a seal. In the toothbrush main body, the battery converts electric energy into rotational power through the motor. The rotational power is transmitted to the toothbrush head through the crank mechanism and then through the swing rod; in the toothbrush main body, The battery is connected to the circuit board via wires, and the circuit board is connected to the motor via wires. Transmission parts are connected to the main shaft of the motor and the central shaft of the crank mechanism. The main shaft of the motor is connected to the crank mechanism through the transmission parts. The crank mechanism uses a swinging rod shaft and a swinging rod. The swing rod is connected with the housing via a fulcrum device, the battery, circuit board and the motor are fixed in the housing, the crank mechanism is connected with the housing by the central axis, and the seal is connected with the housing and the swing rod; the toothbrush head is connected with the toothbrush host through the toothbrush The arm is connected with the swing rod, and the connection between the toothbrush head and the toothbrush main body is locked by a buckle. The said motor can also connect the main shaft and the central shaft or directly replace the central shaft, so that the motor is connected with the crank mechanism. The crank mechanism is composed of a central shaft, a swinging rod shaft and a crank. The central shaft and the swinging rod shaft are different in axis. The crank and the central shaft, and the crank and the swinging rod shaft can be fixed as a whole or in a mutually connected relationship. , The main function of the crank mechanism is to drive, and make the crank rotate with the central axis as the rotation axis, and make the swing rod shaft connected to the crank rotate around the central axis. The fulcrum device is provided with a fulcrum or rotating shaft. The fulcrum device mainly includes a horizontal shaft type and a top block type. In the horizontal shaft type fulcrum device, there are a horizontal shaft and a slideway. The horizontal axis is the fulcrum or The shaft, the horizontal axis is located in the slideway, the horizontal axis and the slideway are in a cross state, the diameter of the horizontal axis contacting the slideway section is slightly smaller than the height of the slideway, the horizontal axis can be other non-cylindrical shapes; at the top block type fulcrum In the device, the top block and/or the top block arm are the fulcrums, and there are two or more top blocks and the slide, the top surface of the top block is in contact with the slide, and the top surfaces of the two top blocks are round The curved surface is the best, and the top block is connected to the housing or the swing rod via the top block arm, and the top block arm is an elastic body. In the relationship between the swing rod and the shell connected by the fulcrum device, the function of the fulcrum device is to enable the swing rod to perform the reciprocating swing of the lateral factor and the reciprocating movement of the longitudinal factor in the shell, but it can also limit the entire horizontal direction of the swing rod in the same direction. Shaking. The lateral element of the swing rod in the housing swings back and forth, which is a seesaw movement or a reciprocating swing movement of a rocker arm. The longitudinal direction of the swing lever is the direction in which the swing lever is connected to one end of the toothbrush head, and the swing lever is connected to the swing lever shaft or horizontal axis and the top block arm and one end of the top block; the horizontal direction of the swing lever is perpendicular to the end of the top block. The longitudinal direction of the swing lever. The transmission member is mainly an external gear, and the transmission member can be integrated with the crank, that is, the crank is in the shape of an external gear, and the transmission member and the transmission member are connected in a meshing manner. The circuit board has a circuit switch and a charging interface, as well as a battery charging and management circuit. The function of the circuit board is to open or close the circuit between the battery and the motor, and to charge and manage the battery. The reciprocating oscillation of the lateral factor is hereinafter referred to as reciprocating oscillation; the reciprocating movement of the longitudinal factor is hereinafter referred to as reciprocating movement. In the arrangement where the top block arm and the top block are integrated, the top block arm is also the top block. The sealing element is a soft rubber sleeve.

In the working process of the electric toothbrush, when the switch in the circuit board is pressed to close the circuit switch, the battery and the motor are connected to the circuit to make the motor energize and rotate. The motor drives the crank to rotate with the central axis as the rotation axis through the transmission member. For the rotation of the shaft, the swing rod shaft is made to move around the central axis, and the swing rod connected with the swing rod shaft is made to reciprocate and reciprocate to form a circular motion. At the same time, the swing rod is through the function of the fulcrum device, Then make the end of the swing rod connected with the toothbrush head make the same circular motion, so that the toothbrush head connected to the swing rod also makes the same circular motion, and then use the toothbrush bristles in the toothbrush head to make a circle motion. The teeth are cleaned.

It can be seen from the above that the toothbrush head of the electric toothbrush of the present invention has only the toothbrush bristles and the toothbrush arm, and does not have a large sanitary corner in the oral cavity during use and has a simple structure.

Beneficial effect

The beneficial effects of the present invention are that the toothbrush head of the electric toothbrush has a simple structure, and there is no large sanitary dead corner in the oral cavity during use.

Description of the drawings

The present invention will be further described below in conjunction with the drawings and embodiments.

Figure 1 is an external view of the electric toothbrush of the present invention when the brush head (2) and the toothbrush main body (1) are separated.

Figure 2 is an internal view of the first embodiment, the toothbrush head (2) and the toothbrush main body (1) are in a connected state, the slide (16) in the figure is a groove on the housing (19); the swing lever (5) in the figure ) One end of the toothbrush head (2) is connected, and the direction in which the swing rod (5) is connected to one end of the swing rod shaft (11) is the longitudinal direction of the swing rod (5).

Figure 3 is a view from the direction of the arrow (20) in Figure 2, in which the swing lever shaft (11) is rotated to the upright position in a circle, at this time the toothbrush head (2) is also pushed to the upright position; The left and right directions in is the lateral direction of the swing lever.

Fig. 4 is a view from the direction of arrow (20) in Fig. 2, in which the swing lever shaft (11) is rotated to the right position in a circle, at this time the toothbrush head (2) is shaken to the left.

Fig. 5 is a view from the direction of arrow (20) in Fig. 2, in which the swing lever shaft (11) is rotated to the position directly below one circle, and the toothbrush head (2) is also pulled to the position directly below.

Fig. 6 is a view from the direction shown by the arrow (20) in Fig. 2, in which the swing lever shaft (11) is rotated to the left position in a circle, at this time the toothbrush head (2) is rocked to the right.

Figure 7 is a view of the crank mechanism, in which the crank (9) is an external gear.

Fig. 8 is a view in the direction of arrow (20) in Fig. 7.

Figure 9 is an internal visual view of the second embodiment; the swing lever (5) in the figure is connected to one end of the toothbrush head (2), and the swing lever shaft (11) and the horizontal shaft (8) are connected to the swing lever (5) The direction of one end is the longitudinal direction of the swing rod (5).

Figure 10 is a view from the direction of arrow (20) in Figure 9. In this figure, the swing lever shaft (11) is rotated to the upright position in a circle, and the toothbrush head (2) is also pushed to the upright position at this time; The left-right direction in the figure is the lateral direction of the swing lever.

Figure 11 is a view from the direction of arrow (20) in Figure 9. In this figure, the swing lever shaft (11) is rotated to the right position in a circle, and the toothbrush head (2) is now rocked to the right.

Fig. 12 is an internal visual view of the third embodiment.

Figure 13 is a view from the direction shown by the arrow (20) in Figure 12, in which the swing lever shaft (11) is rotated to the upright position in a circle, at this time the toothbrush head (2) is also pushed to the upright position; In the figure, the swing rod (5) is connected to one end of the toothbrush head (2), and the direction in which the swing rod (5) is connected to the top block (14) and one end of the swing rod shaft (11) is the longitudinal direction of the swing rod (5). ; The left-right direction in the figure is the lateral direction of the swing lever.

Fig. 14 is a view from the direction of the arrow (20) in Fig. 12, in this figure, the swing lever shaft (11) is rotated to the right position in a circle, and the toothbrush head (2) is shaken to the left at this time.

Fig. 15 is an internal visual view of the fourth embodiment.

Figure 16 is a view from the direction of arrow (20) in Figure 15. In this figure, the swing lever shaft (11) is rotated to the upright position in a circle, and the toothbrush head (2) is also pushed to the upright position at this time; In the figure, the swing rod (5) is connected to one end of the toothbrush head (2), and the direction in which the swing rod (5) is connected to the swing rod shaft (11) and one end of the top block arm (15) is the direction of the swing rod (5). Longitudinal; the left-right direction in the figure is the horizontal direction of the swing lever.

Fig. 17 is a view from the direction of arrow (20) in Fig. 15. In this figure, the swing lever shaft (11) is rotated to the left position in a circle, and the toothbrush head (2) is now shaken to the left.

Figure 18 is a view of the horizontal axis (8) and the slideway (16) in Figure 2 as shown by the arrow (21); at the same time, the horizontal axis (8) can be moved back and forth in the slideway (16) In the schematic diagram, the rotation of the horizontal axis (8) in the slideway (16) refers to the rotation of the horizontal axis (8) itself as the rotation axis.

In the figure, 1. Toothbrush host, 2. Toothbrush head, 3. Toothbrush arm, 4. Toothbrush bristles, 5. Swing lever, 6. Battery, 7. Motor, 8. Horizontal axis, 9. Crank, 10. Central axis, 11. Swing rod shaft, 12. Circuit board, 13. Switch, 14. Top block, 15. Top block arm, 16. Slide, 17. Transmission parts, 18. Motor spindle, 19. Housing, 20. Arrow, 21 The reciprocating direction of the horizontal axis indicates the arrow.

In the figure, the external gear type crank (9) and the transmission member (17) do not show the gear teeth and the meshing state of the gear teeth, but for the convenience of drawing, there are gear teeth and the meshing state in practice.

The best mode of the present invention

In the first embodiment shown in Figure 2, the battery (6), the circuit board (12) and the motor (7) are fixed in the housing (19), and the switch (13) button on the circuit board (12) extends To the outside of the housing (19), the circuit board (12) is connected to the battery (6) and the motor (7) via electrical wires. The motor shaft (18) of the motor (7) is connected to a transmission member (17), and the transmission member ( 17) It is a circular external gear, the central shaft (10) in the crank mechanism is connected with the housing, the crank (9) in the crank mechanism is a circular external gear, the crank (9) and the transmission member (17) are geared In meshing connection, the swing lever shaft (11) in the crank mechanism is connected with one end of the swing lever (5), the middle of the swing lever (5) is connected to the horizontal shaft (8), and the two ends of the horizontal shaft (8) are located in the housing (19) In the upper slideway (16), the other end of the swing rod (5) extends out of the housing (19) and is connected to the toothbrush head (2). In this embodiment, the crank (9), the central shaft (10) and the swing lever shaft (11) are integrated. When the switch (13) connects the circuit between the battery (6) and the motor (7), the motor (7) rotates and passes through the motor shaft (18), driving the transmission member (17) to rotate, and the rotating transmission member (17) passes through the wheel The teeth drive the crank (9) to rotate about the central axis (10). The rotating crank (9) drives the swing lever shaft (11) to rotate around the central axis (10), and then the swing lever shaft (11) drives the swing lever (5), a circular motion formed by reciprocating swing and reciprocating movement; at the same time, the end of the swing rod (5) connected with the toothbrush head (2) moves back and forth in the slideway (16) via the connected horizontal shaft (8) , And the reciprocating rotation of the horizontal shaft (8) in the slideway (16), or the reciprocating rotation of the horizontal shaft (8) in the swing lever (5) to make the same or close to the swing lever axis (11) ), the swing lever (5) simultaneously drives the toothbrush head (2) to make a circular motion, and the toothbrush head (2) performs a circular motion to clean the teeth. The rotation of the swing rod shaft (11) is a planetary motion around the central shaft (10). The horizontal axis (8) is the axis or fulcrum for the reciprocating swing of the swing lever (5), as well as the support and limit for the reciprocating movement of the swing lever (5); when the horizontal axis (8) is set to reciprocate in the slideway (16) , The horizontal axis (8) is the axis of reciprocating swing of the swing lever (5); when the horizontal axis (8) is set to reciprocate in the swing lever (5), the horizontal axis (8) is the swing lever (5) The fulcrum of reciprocating swing; the horizontal axis (8) is also the axis of rotation or the fulcrum described in the claims.

In this embodiment, it can be seen that the toothbrush head (2) of the electric toothbrush of the present invention has only the toothbrush bristles (4) and the toothbrush arm (3). It does not have a large sanitary corner in the oral cavity during use and has a simple structure. The invention achieved its purpose.

Embodiments of the present invention

In the second embodiment shown in Figure 9, the battery (6), the circuit board (12) and the motor (7) are fixed in the housing (19), and the switch (13) button on the circuit board (12) extends To the outside of the housing (19), the circuit board (12) is connected to the battery (6) and the motor (7) via electrical wires. The motor shaft (18) of the motor (7) is connected to the crank (9) in the crank mechanism, and the motor shaft (18) At the same time, instead of the central shaft (10) in the crank mechanism, the swing rod shaft (11) is connected to the middle of the swing rod (5), and one end of the swing rod (5) has a slide (16), the slide ( 16) It is a long strip hole penetrating both sides of the swing rod (5). The slideway (16) is connected with the horizontal shaft (8), and the horizontal shaft (8) is connected with the housing. The other end of the swing rod (5) extends The outer shell (19) is connected to the toothbrush head (2), the horizontal shaft (8) cannot move radially in the shell, and the horizontal shaft (8) and the shell can also be fixedly connected. When the switch (13) connects the circuit between the battery (6) and the motor (7), the motor (7) rotates and passes through the motor shaft (18), driving the crank (9) to rotate, and the rotating crank (9) drives the swing lever shaft (11) Rotate around the motor main shaft (18), the swing rod shaft (11) drives the connected swing rod (5) to make a circular motion formed by reciprocating swing and reciprocating movement, and at the same time through the slide (16) on the horizontal axis (8) Under the action of the reciprocating movement and reciprocating rotation, the end of the swing rod (5) connected with the toothbrush head (2) makes a circular motion that is the same as or close to the swing rod shaft (11), and the swing rod ( 5) At the same time, it drives the toothbrush head (2) to make a circular motion, and the toothbrush head (2) performs a circular motion to clean the teeth. The fulcrum device uses the slideway (16) to move and rotate on the horizontal axis (8) to support one end of the swing rod (5) to drive the other end to make the same or close circular motion. The rotation of the swing rod shaft (11) is a planetary motion around the motor shaft (18). The horizontal axis (8) is the fulcrum of the reciprocating swing of the swing lever (5) and the support and limit of the reciprocating movement of the swing lever (5), and the horizontal axis (8) is also the fulcrum described in the claims.

In this embodiment, the forward or reverse rotation of the motor can be controlled to make the circle-drawing action of the toothbrush head forward or reverse, and the forward or reverse rotation of the motor can be controlled through the switch and the electronic components in the circuit board to change The positive and negative poles of the input electrodes of the motor are realized.

In the third embodiment shown in Figure 12, the battery (6), the circuit board (12) and the motor (7) are fixed in the housing (19), and the switch (13) button on the circuit board (12) extends To the outside of the housing (19), the circuit board (12) is connected to the battery (6) and the motor (7) via electrical wires. The motor shaft (18) of the motor (7) is connected to a transmission member (17), and the transmission member ( 17) It is a circular external gear, the central shaft (10) in the crank mechanism is connected with the housing, one end of the central shaft (10) is connected with a transmission member (17), the transmission member (17) is also circular External gear, meshing connection between the two transmission parts (17), the swing rod shaft (11) is connected with one end of the swing rod (5), and the other end of the swing rod (5) extends out of the housing (19) and is attached to the toothbrush The head (2) is connected, the middle of the swing rod (5) is connected with the top block (14) on the shell (19), and the top block (14) is connected with the shell (19) through the top block arm (15). When the switch (13) connects the circuit between the battery (6) and the motor (7), the motor (7) rotates and passes through the motor shaft (18), driving the two transmission parts (17) to rotate, the rotating transmission part (17) The crank (9) is driven to rotate by the central shaft (10), the rotating crank (9) drives the swing rod shaft (11) to rotate around the central shaft (10), and the swing rod shaft (11) drives the swing rod (5) to reciprocate The circular motion formed by swinging and reciprocating movement. At the same time, under the action of the reciprocating movement and reciprocating swing of the top block (14) via the slide (16), the end of the swing rod (5) connected with the toothbrush head (2) is made The swinging rod (5) simultaneously drives the toothbrush head (2) to make a circular motion, and the toothbrush head (2) performs a circular motion to clean the teeth. The slideway (16) described in this embodiment is the outer side of the swing rod (5). The top block arm (15) is an elastic member, which elastically supports the top block (14) to abut on the swing rod (5) and supports the adjustment of the gap between the top block (14) and the swing rod (5). The top block (14) is the fulcrum of the reciprocating swing of the swing rod (5) and the support and limit of the reciprocating movement, and the top block (14) is also the fulcrum described in the claims.

In the fourth embodiment shown in Figure 15, the battery (6), the circuit board (12) and the motor (7) are fixed in the housing (19), and the switch (13) button on the circuit board (12) extends To the outside of the housing (19), the circuit board (12) is connected to the battery (6) and the motor (7) via electrical wires. The motor shaft (18) of the motor (7) is connected to the crank (9) in the crank mechanism, and the motor shaft (18) At the same time, instead of the central shaft (10) in the crank mechanism, the swing rod shaft (11) is connected to the middle of the swing rod (5), and one end of the swing rod (5) is connected to the top block arm (15), the top block arm (15) Connect the top block (14), the top block (14) is connected with the casing (19), the casing (19) that the top block (14) touches is the slideway (16) in the fulcrum device, the swing lever (5) The other end of) extends out of the housing (19) and is connected to the toothbrush head (2). When the switch (13) connects the circuit between the battery (6) and the motor (7), the motor (7) rotates and passes through the motor shaft (18), driving the crank (9) to rotate, and the rotating crank (9) drives the swing lever shaft (11) Make planetary motion around the motor main shaft (18), and then the swing rod shaft (11) drives the swing rod (5) to make a circular motion formed by reciprocating swing and reciprocating movement, and at the same time pass the top block (14) in the slideway (16) Under the action of reciprocating movement and reciprocating swing, the end of the swing rod (5) connected with the toothbrush head (2) makes a circular motion that is the same as or close to the swing rod shaft (11), and the swing rod (5) At the same time, the toothbrush head (2) is driven to perform a circular motion, and the toothbrush head (2) performs a circular motion to clean the teeth. The top block arm (15) is an elastic member, which elastically supports the top block (14) to abut against the casing (19), and supports the adjustment of the gap between the top block (14) and the casing (19). The top block (14) is the fulcrum of the reciprocating swing of the swing rod (5) and the support and limit of the reciprocating movement, and the top block (14) is also the fulcrum described in the claims.

Industrial applicability

The oscillating electric toothbrush of the present invention can be produced with existing materials and equipment.

Claims

An electric toothbrush is composed of a toothbrush head connected to a toothbrush main body. There are toothbrush bristles in the toothbrush head. In the toothbrush main body, the battery is connected to the circuit board, the circuit board is connected to the motor, and the circuit board is connected to the switch. The toothbrush head is characterized in that the toothbrush main body (1) has a fulcrum device, a swing rod (5), a transmission member (17) and a crank mechanism. In the crank mechanism, there are a crank (9), a center The shaft (10) and the swing rod shaft (11); the crank mechanism is connected with the motor (7), the swing rod (5) is connected with the crank mechanism, and the swing rod (5) is connected with the housing (19) via the fulcrum device; the motor (7) The power is connected to the swing lever (5) via the crank mechanism, and then connected to the toothbrush head (2) by the swing lever (5); the swing lever (5) is set to perform reciprocating movement and reciprocating swing action in the main body (1), and to The reciprocating movement and reciprocating swinging action form the turning action of the swinging rod (5); in the fulcrum device, a fulcrum or rotating shaft for the swinging rod to perform reciprocating swinging action is provided, and a sliding groove (16) is provided, and at the same time, the fulcrum The fulcrum or shaft mentioned above is the reciprocating support and limit for the swing rod.
The electric toothbrush according to claim 1, characterized in that: the fulcrum in the fulcrum device can be a horizontal axis (8), a top block (14), or a top block arm (15), or other geometric shapes Object; the axis of rotation in the fulcrum device can be a horizontal axis (8) or an object of other geometric shapes.
The electric toothbrush according to claim 1, characterized in that: the crank mechanism can be integrated or split, and the integrated crank mechanism is the crank (9), the central shaft (10) and the swing rod shaft ( 11) A whole fixed together, which also includes one-piece casting; the split crank mechanism is a crank mechanism formed by connecting the crank (9), the central shaft (10) and the swing rod shaft (11) together .
The electric toothbrush according to claim 1, characterized in that: the top block (14) and the top block arm (15) can be integrated, and the top block (14) and the top block arm (15) can also be combined with the housing (19) Or the swing lever (5) is integrated, and the top block arm (15) is an elastic body.
The electric toothbrush according to claim 1, characterized in that: the horizontal axis (8) in the fulcrum device can be a non-circular geometric shape except where rotation is needed, and the horizontal axis (8) can be connected to the swing The rod (5) is a whole.
The electric toothbrush according to claim 1, characterized in that the swing lever (5) performs reciprocating movement and reciprocating swing action in the host (1), and the reciprocating movement and reciprocating swing action form the swing lever (5) The circling movement is the direction of action under the same viewing angle; the reciprocating movement is the reciprocating movement of the longitudinal factor, and the reciprocating movement is the reciprocating movement of the lateral factor; the longitudinal direction of the swing lever (5) is the swing lever (5) Connect one end of the toothbrush head (2) to the swing lever (5) to connect the swing lever shaft (11) or the horizontal shaft (8) and the direction of the top block arm (15) and one end of the top block (14); The transverse direction of the swinging rod (5) is a direction perpendicular to the longitudinal direction of the swinging rod (5); the radial direction of the turning motion of the swinging rod (5) is in a staggered state with the axial direction of the toothbrush bristles. The axial direction is the direction from one end of the toothbrush bristles to the other end.
The electric toothbrush according to claim 1, characterized in that: the crank (9) can be an external gear or other geometric shapes, and the crank (9) can be directly connected with the motor shaft (18) to obtain the motor (7) power.
The electric toothbrush according to claim 1, characterized in that: the slideway (16) can be indirectly connected with the fulcrum and the rotating shaft, and the slideway (16) can pass through the wear-resistant parts and/or drag reducing parts, and then connect with the fulcrum and the shaft. connection.
The electric toothbrush according to claim 1, characterized in that: the chute (16) in the fulcrum device can be located in the housing (19) or on the swing rod (5), the swing rod (5) and the housing (19) can be a slide; the slide groove (16) is connected to the horizontal shaft (8), or connected to the top block (14), or an integral piece with the top block (14) and the top block arm (15) connection.
The fulcrum according to claim 1, characterized in that: the swing rod (5) is directly or indirectly connected to the toothbrush head (2), one end of the swing rod (5) is in the housing (19), and the other end is in the housing ( 19) Outside.