An electric toothbrush

Abstract

The present application provides a kind of electric toothbrush, the electric toothbrush includes brush head assembly and handle body assembly connected with each other, the brush head assembly includes brush head and brush rod connected with each other, the brush rod is connected with handle body assembly, the handle body assembly includes main shell, driving device and input arm, the driving device is arranged in main shell, for the driving force of motion provided to input arm, the input arm is used to transmit driving force to brush rod, the brush rod includes inner shell and outer shell, part of the input arm is arranged in main shell, another part extends out of main shell and extends into the inner shell, the outer shell covers the inner shell electric toothbrush is further provided with adjusting assembly, the adjusting assembly is used to adjust the switch of brush head relative to main shell in rotation mode or swing mode;User can adjust the cleaning mode of the electric toothbrush according to personal use habit.

Description

Technical Field

[0001] This invention relates to the field of oral care technology, and more particularly to an electric toothbrush. Background Technology

[0002] As an oral care device, an electric toothbrush works by using the rapid rotation or vibration of a motor to cause the brush head to oscillate or rotate at high frequency. This instantly breaks down toothpaste into fine foam, allowing for deep cleaning between teeth. Simultaneously, the bristle vibrations promote blood circulation in the mouth and massage the gum tissue. During the development of electric toothbrushes, engineers explore different technologies to enable the brush head to clean teeth using various motion modes, aiming for better cleaning results. While electric toothbrushes that allow the brush head to switch between different motion modes already exist, there is still room for exploration and improvement in this design aspect. Summary of the Invention

[0003] To address the aforementioned technical problems, this invention provides an electric toothbrush whose brush head can switch between two different motion modes: a rotation mode and a oscillating mode. Users can adjust the electric toothbrush to suit their personal habits. Furthermore, when replacing the bristles, users only need to discard a small portion connected to the bristles to obtain new bristles, thus saving resources. The technical solution adopted by this invention is as follows:

[0004] This invention provides an electric toothbrush, comprising a brush head assembly and a handle assembly connected to each other. The brush head assembly includes a brush head and a brush handle connected to each other. The brush handle is connected to the handle assembly. The handle assembly includes a main housing, a drive device, and an input arm. The drive device is disposed within the main housing and is used to provide a driving force for the input arm. The input arm is used to transmit the driving force to the brush handle. The brush handle includes an inner shell and an outer shell. A portion of the input arm is disposed within the main housing, and another portion extends out of the main housing and into the inner shell. The outer shell covers the inner shell. The electric toothbrush is also provided with an adjustment component for adjusting the brush head relative to the main housing to switch between a rotation mode and a swing mode.

[0005] Specifically, along the length of the electric toothbrush, the adjustment assembly is disposed between the inner shell and the main shell, and the outer shell covers at least a portion of the adjustment assembly. The adjustment assembly can be adjusted to connect or disconnect the outer shell from the inner shell. Further, the adjustment assembly includes a first adjustment assembly and a second adjustment assembly coupled to each other along the length of the electric toothbrush. The first adjustment assembly is used to connect or disconnect with the inner shell, or to connect or disconnect with the outer shell, and the second adjustment assembly is used to connect or disconnect with the outer shell, or to connect or disconnect with the main shell. Further, the first adjustment assembly includes a first shell, a first pushing member, and at least one first forced pushing member. The first forced pushing member is mounted on the first shell in a radially movable manner relative to the first shell, and the first shell restricts the circumferential movement of the first forced pushing member. The first pushing member is disposed within the first shell and is used to force the first forced pushing member to move radially towards or away from the inner shell.

[0006] Further, the second adjustment assembly includes a second housing, a second pusher, and at least one second forced pusher. The second forced pusher is mounted on the second housing in a radially movable manner relative to the second housing, and the second housing restricts the circumferential movement of the second forced pusher. The second forced pusher is disposed within the second housing and is used to force the second forced pusher to move radially closer to or away from the housing. The first pusher includes a first driven portion, a first guide rail portion, and a first spacer portion for separating the first driven portion and the first guide rail portion. The first driven portion and the first guide rail portion are disposed opposite to each other on the first spacer portion. The first driven portion is used to receive a transmission force to rotate the first pusher. The first spacer portion is configured as an annular structure with an inner circle and an outer circle sharing a common center. Along a clockwise or counterclockwise direction viewed from above, the distance from a point on the first guide rail portion to the center of the first spacer portion gradually increases.

[0007] Furthermore, the adjustment assembly also includes at least one operable member disposed between the first adjustment assembly and the second adjustment assembly. The operable member includes a force receiving part and a transmission part. The force receiving part is used to receive the rotational force applied by the user to make the operable member rotate. The transmission part is used to be connected to the first push member and the second push member respectively. After the operable member rotates, the transmission part drives the first push member and the second push member to rotate.

[0008] Furthermore, an eccentric rod is provided between the inner shell and the brush head. The eccentric rod is detachably installed on the inner shell to connect the inner shell and the brush head. The eccentric rod is non-coaxially connected to the inner shell.

[0009] In some implementations, the brush head is detachably mounted on the brush handle.

[0010] In some embodiments, the brush head is provided with a sensor that sends a stop signal to the electric toothbrush when it comes into contact with the brush head, causing the electric toothbrush to stop working. Attached Figure Description

[0011] Figure 1 This is an overall view of the electric toothbrush that relates to the present invention.

[0012] Figure 2 This is an exploded view of the electric toothbrush that relates to the present invention.

[0013] Figure 3A This is an exploded view of the adjustment component involved in the present invention.

[0014] Figure 3B This is an exploded view of the adjustment assembly of the present invention after the first and second housings are concealed.

[0015] Figure 4A This is a perspective view of the first thrust member involved in the present invention.

[0016] Figure 4B This is a top view of the first thrust member involved in the present invention, viewed from above.

[0017] Figure 5A This is a schematic diagram of the electric toothbrush in rotation mode according to the present invention.

[0018] Figure 5B This is a schematic diagram of the electric toothbrush in oscillating mode according to the present invention.

[0019] Figure 5C This is a perspective view showing the disassembled long brush head and brush handle of the invention. Detailed Implementation

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] Figure 1 This is an overall view of the electric toothbrush that relates to the present invention; Figure 2 This is an exploded view of the electric toothbrush that relates to the present invention.

[0022] like Figure 1 and Figure 2As shown, the present invention provides an electric toothbrush 100, including a brush head assembly 101 and a handle assembly 102 connected to each other. The brush head assembly 101 includes a brush head 10 and a brush handle 20 connected to each other. The brush handle 20 is connected to the handle assembly 102. The brush head 10 includes a bristle portion 11 provided with bristles. Preferably, the brush head 10 is detachably mounted on the brush handle 20. This design allows the user to obtain new bristles for the electric toothbrush 100 simply by replacing the brush head 10. Compared with the traditional design that replaces the brush head and brush handle as a whole, the design of the present invention is more conducive to saving resources. The extension direction of the bristles on the brush head 10 is not on the same straight line as the extension direction of the brush handle 20. Preferably, the extension direction of the bristles is perpendicular to the extension direction of the brush handle 20. In addition, the user can adjust the electric toothbrush 100 to switch between rotation mode and oscillation mode relative to the main housing 104 described below. The meanings of the rotation mode and oscillation mode of the brush head 10 / electric toothbrush 100 are as follows.

[0023] To better illustrate the present invention, the orientations involved in the following description are first defined as follows: the length direction of the electric toothbrush 100 is the vertical direction, wherein the side where the brush head 10 is located is the upper direction, and the side opposite to the side where the brush head 10 is located is the lower direction; the front-back direction is the direction intersecting with the vertical direction. Preferably, the front-back direction is perpendicular to the vertical direction. Specifically, the front-back direction is the direction in which the bristles of the brush head 10 extend, and the side of the brush head 10 with bristles is the front, and the side opposite to the side where the bristles are located is the rear.

[0024] like Figure 2 As shown, the brush head 10 also includes a brush head assembly portion 12, which is disposed behind the bristle portion 11 and extends away from the brush head 11. The brush head 10 is mounted on the brush handle 20 via the brush head assembly portion 12. The brush handle 20 includes a housing 21 and an inner housing 22. The housing 21 covers the inner housing 22 and the brush head assembly portion 12 of the brush head 10 for protection.

[0025] The handle assembly 102 includes a main housing 104, a drive unit (not shown), and an input arm 103. The drive unit is disposed within the main housing 104 and provides a driving force for the input arm 103. The input arm 103 then transmits the driving force to the brush handle 20, which in turn transmits the driving force to the brush head 10, thereby enabling the brush head 10 to perform cleaning operations. The main housing 104 and the outer shell 21 of the brush handle 20 are connected to each other along the length of the electric toothbrush 100. The main housing 104 has a central axis 104a extending in the vertical direction. A portion of the input arm 103 is disposed within the main housing 104, and another portion extends out of the main housing 104 and into the inner shell 22 of the brush handle 20. The input arm 103 has a central axis 103a coaxial with the central axis 104a. During movement, the input arm 103 reciprocates and rotates relative to the main housing 104 within a certain angle range around the central axis 103a / 104a. More specifically, when viewed from above, the movement trajectory of the outer edge of the input arm 103 during rotation is an arc.

[0026] The inner shell 22 also has a central axis 22a. Since the input arm 103 is located inside the inner shell 22 and is coaxially fixedly connected to the inner shell 22, the three central axes 104a / 103a / 22a are collinear. That is, the inner shell 22 can reciprocate and rotate around the central axis 104a / 103a / 22a relative to the main shell 104 as the input arm 103 rotates.

[0027] Furthermore, the brush head assembly part 12 of the brush head 10 is cylindrical and has a central axis 10a extending in the front-rear direction. In order to enable the brush head 10 to be detachably mounted on the brush rod 20, the outer surface of the brush head assembly part 12 is provided with a circumferentially extending assembly groove 121. The upper part of the outer shell 21 of the brush rod 20 is provided with a brush head mounting part 211. The brush head mounting part 211 can cover the brush head assembly part 12 to provide protection. Specifically, the brush head mounting part 211 includes a recessed cylindrical mounting hole 213. The brush head assembly part 12 can enter the mounting hole 213. The mounting hole 213 can guide the brush head 10 to reciprocate and rotate relative to the outer shell 21 around the central axis 10a of the brush head assembly part 12 within a certain angle range. The brush head mounting part 211 is provided with an assembly hole 212, which is connected to the assembly groove 121 in the vertical direction. A fixing member 124 is inserted into the assembly groove 121 and the assembly hole 212 to ensure that the brush head 10 does not fall off the outer shell 21. The fixing member 124 can be a pin, screw, etc. Furthermore, an elastic element 123 is provided at the rear of the brush head assembly 12, and a sensor 122 is provided at the bottom of the mounting hole 213. When the electric toothbrush 100 is cleaning, the bristles 11 of the brush head 10 are subjected to a rearward force, and the entire brush head 10 moves backward. The elastic element 123 is compressed or stretched to adjust the force on the bristles 11, thereby improving the force on the teeth. When the force on the bristles 11 exceeds the elastic limit of the elastic element 123, the brush head assembly 12 contacts the sensor 122, and the sensor 122 sends a stop signal to the electric toothbrush 100, thereby stopping the electric toothbrush 100. The elastic element 123 can be a commonly used elastic part in the prior art, such as a tension spring, a spring, or a sponge.

[0028] Furthermore, an eccentric rod 28 is provided between the inner shell 22 and the brush head 10. The eccentric rod 28 is detachably mounted on the inner shell 22 for connecting the inner shell 22 and the brush head 10. The eccentric rod 28 and the inner shell 22 are non-coaxially connected. The eccentric rod 28 includes a first part 281 and a second part 282 connected at an angle. Preferably, the first part 281 and the second part 282 are perpendicular to each other. The first part 281 extends vertically and is used for non-coaxial connection with the inner shell 22. The first part 281 has a central axis 28a. Preferably, the central axis 28a of the first part 281 is located behind the central axis 22a of the inner shell 22. This design makes the layout of internal parts more reasonable and helps to reduce the size of the outer shell 21. Furthermore, the central axis 28a of the first part 281 is aligned with the central axis 22a of the inner shell 22 in the front-back direction. With this design, when the inner shell 22 rotates around the central axis 104a / 103a / 22a, the eccentric rod 28 rotates around the central axis 28a. The second part 282 extends in the front-back direction and is used for connection with the brush head 10. Specifically, the brush head assembly part 12 is provided with an opening or slot, and the second part 282 extends into the opening or slot to realize the connection between the brush head 10 and the eccentric rod 28.

[0029] Figure 3A This is an exploded view of the adjustment component involved in the present invention; Figure 3B This is an exploded view of the adjustment assembly of the present invention after the first and second housings are concealed; Figure 4A This is a perspective view of the first thrust member involved in the present invention; Figure 4B This is a top view of the first thrust member involved in the present invention, viewed from above.

[0030] Furthermore, such as Figure 2 As shown, the electric toothbrush 100 is provided with an adjustment component 23, which the user can adjust to switch the brush head 10 between rotation mode and oscillation mode relative to the main housing 104. Specifically, the adjustment component 23 is disposed on the brush handle 20 along the vertical direction. The adjustment component 23 is located between the inner shell 22 and the main shell 104. The outer shell 21 covers at least a portion of the adjustment component 23. The user can adjust the adjustment component 23 to connect or disconnect the outer shell 21 from the inner shell 22. This allows the input arm 103, the inner shell 22, and the outer shell 21 to reciprocate and rotate relative to the main shell 104 around the central axis 104a / 103a / 22a under the drive of the input arm 103. At this time, the electric toothbrush 100 is in the swing mode. Alternatively, the input arm 103 and the inner shell 22 reciprocate and rotate relative to the outer shell 21 / main shell 104 around the central axis 104a / 103a / 22a, while the brush head 10 reciprocates and rotates relative to the outer shell 21 around the central axis 10a. At this time, the electric toothbrush 100 is in the rotation mode.

[0031] Specifically, the adjustment assembly 23 includes a first adjustment assembly 24 and a second adjustment assembly 25 that are connected to each other in the vertical direction. The first adjustment assembly 24 is used to connect or disconnect from the inner shell 22, or to connect or disconnect from the outer shell 21. Preferably, in order to increase the connection position between the first adjustment assembly 24 and the inner shell 22 and make the connection between the two more stable, the first adjustment assembly 24 is configured as a ring structure, and the lower end of the inner shell 22 extends into the ring of the first adjustment assembly 24. The second adjustment assembly 25 is used to connect or disconnect from the outer shell 21, or to connect or disconnect from the main shell 104. Similarly, the second adjustment assembly 25 is also configured as a ring structure, and at least a part of the main shell 104 extends into the ring of the second adjustment assembly 25.

[0032] The structures of the first adjustment component 24 and the second adjustment component 25 are largely the same. The structure of the first adjustment component 24 will be described first: (e.g.) Figure 3A and Figure 3B As shown, the first adjustment assembly 24 includes a first housing 241, a first pushing member 242, and at least one first forced pushing member 243. The first housing 241 and the first pushing member 242 are annular structures. The first forced pushing member 243 is mounted on the first housing 241 in a radially movable manner relative to the first housing 241, while the first housing 241 restricts the circumferential rotation of the first forced pushing member 243. Further, a portion of the first forced pushing member 243 is covered by the first housing 241, and another portion is exposed from the first housing 241. The first pushing member 242 is disposed inside the first housing 241 and is used to push the first forced pushing member 243 to move in the radial direction to approach or move away from the inner housing 22, or approach or move away from the outer housing 21, thereby contacting and connecting with the inner housing 22 or the outer housing 21.

[0033] Specifically, the first pushing member 242 includes a first driven portion 2421, a first guide rail portion 2422, and a first spacer portion 2423 for separating the first driven portion 2421 and the first guide rail portion 2422. The first driven portion 2421 and the first guide rail portion 2422 are disposed opposite to each other on the first spacer portion 2423. The first driven portion 2421 is used to receive the transmission force to rotate the first pushing member 242, thereby causing the first guide rail portion 2422 to rotate simultaneously, and applying a pushing force to the first pushing member 243 during the rotation. The first driven portion 2423 is configured as a ring-shaped rack. Further, as... Figure 4A As shown, the first guide rail portion 2422 is formed by one or more arc-shaped strips. Preferably, the first guide rail portion 2422 is formed by a continuous first arc-shaped strip 2422a disposed on the first spacing portion 2423. Specifically, as shown... Figure 4BAs shown, the first spacing portion 2423 is a ring structure, and the inner and outer circles of the first spacing portion 2423 are concentric circles sharing a common center o1. The first arc-shaped strip 2422a is spirally arranged on the first spacing portion 2423. More specifically, along the counterclockwise direction viewed from top to bottom, the first arc-shaped strip 2422a gradually moves away from the inner circle of the first spacing portion 2423 and gradually moves closer to the outer circle of the first spacing portion 2423, and the first arc-shaped strip 2422a rotates at least two 360°, thereby forming a first groove 2422b between radially adjacent portions of the first arc-shaped strip 2422a. Along the clockwise direction viewed from top to bottom, the radial dimension of the first groove 2422b gradually decreases. Figure 4B As shown, points e1 and e2 are arbitrarily selected on the first guide rail 2422 along the counterclockwise direction observed from top to bottom, and the two are connected to the center o1 respectively to obtain radii R1 and R2. Point e2 is downstream of point e1, so the radius R2 is greater than the radius R1. Therefore, it can be concluded that along the counterclockwise direction observed from top to bottom, the distance from the point on the first guide rail 2422 to the center o1 gradually increases.

[0034] Furthermore, the first forced push member 243 is generally a cuboid structure, and includes a first connecting portion 2431, a second connecting portion 2432, a first force-bearing portion 2433, and at least one first assembly portion 2434. The first connecting portion 2431 and the second connecting portion 2432 are arranged radially spaced apart from each other. The first connecting portion 2431 faces the inner shell 22 and is used for contact connection with the inner shell 22 (such as abutment, snap-fit, adhesive, or magnetic connection). The second connecting portion 2432 is exposed from the first shell 241. And facing the outer shell 21, for contact and connection with the outer shell 21; the first assembly part 2433 is adjacent to the first force-bearing part 2434. The first assembly part 2433 is used to enable the first forced push member 243 to be radially movable and mounted on the first housing 241. Preferably, the first forced push member 243 is engaged with the first housing 241 through the first assembly part 2434. In order to make the first forced push member 243 move radially more stably, two first assembly parts 2434 are provided on the first forced push member 243 at relative intervals along the circumferential direction.

[0035] The first force-receiving part 2433 is used to receive the pushing force from the first pushing member 242. Specifically, the first force-receiving part 2433 is engaged with the first guide rail part 2422 of the first pushing member 242. Preferably, at least one protrusion is provided on the first force-receiving part 2433, and the protrusion is engaged with the first groove 2422b of the first guide rail part 2422. Since the first pushing member 243 is restricted from circumferential movement by the first housing 241, when the first pushing member 242 rotates in a counterclockwise direction viewed from top to bottom, the radial dimension of the groove at the engagement point of the first groove 2422b with the first pushing member 243 gradually decreases. The engagement point is closer to the inner shell 22 than the engagement point before rotation. That is, the first groove 2422b will apply a squeezing force to the first forced push member 243, causing it to move radially toward the inner shell 22. Similarly, if the first forced push member 242 rotates clockwise when viewed from top to bottom, the radial dimension of the groove on the first groove 2422b that engages with the first forced push member 243 gradually increases. At this time, the engagement point is further away from the inner shell 22 than the engagement point before rotation. That is, the first groove 2422b will apply a squeezing force to the first forced push member 243, causing it to move radially away from the inner shell 22.

[0036] In other embodiments, the first arc-shaped strip 2422a may also gradually move away from the inner circle of the first interval portion 2423 and gradually move closer to the outer circle of the first interval portion 2423 in a clockwise direction viewed from top to bottom. At this time, the distance from the point on the first guide rail portion 242 to the center o1 gradually increases in a clockwise direction viewed from top to bottom. When the first pusher 242 of this embodiment is rotated according to the above description, the technical effect opposite to the above description will occur.

[0037] like Figure 3A and Figure 3BAs shown, the second adjustment assembly 25 includes a second housing 251, a second pushing member 252, and at least one second forced pushing member 253. The second forced pushing member 252 is mounted on the second housing 251 in a radially movable manner relative to the second housing 251, and the second housing 251 restricts the circumferential movement of the second forced pushing member 253. The second forced pushing member 253 is disposed within the second housing 251 and is used to push the second forced pushing member 253 radially to move closer to or away from the outer shell 21 or the main housing 104, thereby contacting and connecting with the outer shell 21 or the main housing 104. The second adjustment assembly 25 and the first adjustment assembly 24 have a symmetrical plane 45 extending in a direction perpendicular to the vertical direction. Along the vertical direction, the structure of the second adjustment assembly 25 is symmetrically arranged with the structure of the first adjustment assembly 24, that is, the second adjustment assembly 25 viewed from below has the same structure as the first adjustment assembly 24 viewed from above. This design simplifies the processing steps of the adjustment assembly 23, thereby improving production efficiency. The structure of the second adjustment assembly 25 will not be described in detail here. In other embodiments, the second adjustment component 25 and the first adjustment component 24 may also be arranged asymmetrically, that is, the second adjustment component 25 viewed from bottom to top has more or fewer parts than the first adjustment component 24 viewed from top to bottom, that is, the two have different structures, as long as the adjustment component 23 can achieve the technical effect described in this specification.

[0038] Furthermore, the adjustment assembly 23 also includes at least one operable element 26 disposed between the first adjustment assembly 24 and the second adjustment assembly 25. A portion of the operable element 26 is housed within the first housing 241 and the second housing 251, while another portion is exposed from the first housing 241 and the second housing 251. The operable element 26 includes a force receiving portion 261 and a transmission portion 262. The force receiving portion 261, exposed from the first housing 241 and the second housing 251, is used to receive rotational force applied by the user to rotate the operable element 26. The force receiving portion 261 may be configured as a protrusion or a groove. The transmission portion 262 is used to drively connect with the driven portions on the first push member 252 and the second push member 252, respectively. When the operable element 26 rotates, the transmission portion 262 can drive the first push member 242 and the second push member 252 to rotate. Preferably, the transmission portion 262 is configured as a helical gear. After the operated component 26 is rotated, the first forced push component 243 and the second forced push component 253 can move radially. In order for the user to better observe the process and adjust the adjustment component 23, the operated component 26, the first forced push component 243 and the second forced push component 253 are arranged side by side at intervals along the vertical direction, that is, the three are on a line along the vertical direction.

[0039] To ensure stable operation of the adjustment assembly 23, the first adjustment assembly 24 includes three first forced pushers 243, which are evenly spaced along the circumferential direction on the first housing 241. The second adjustment assembly 25 also includes three second forced pushers 253, which are evenly spaced along the circumferential direction on the second housing 251. The adjustment assembly 23 has three operated members 26, which are evenly spaced along the circumferential direction between the first housing 241 and the second housing 251. Furthermore, a support member 27 is provided between adjacent operated members 26. The support member 27 fills the structural gap between the first forced pushers 242 and the second forced pushers 252, making the structure of the adjustment assembly 23 more stable.

[0040] Figure 5A This is a schematic diagram of the electric toothbrush in rotation mode according to the present invention. Figure 5B This is a schematic diagram of the electric toothbrush in oscillating mode according to the present invention; Figure 5C This is a perspective view showing the disassembled long brush head and brush handle of the invention.

[0041] The following describes how a user operates the electric toothbrush 100 to switch the brush head 10 between rotation mode and oscillation mode.

[0042] Rotation mode: When the user faces any of the operated components 26 of the adjustment assembly 23 and rotates the operated component 26 counterclockwise from that viewing angle, the operated component 26 drives the first pusher 242 to rotate clockwise from top to bottom. This causes the first pusher 242 to drive the first forced pusher 243 to move radially towards the outer casing 21 until the second connecting part 2432 of the first forced pusher 243 contacts and connects with the outer casing 21. At this point, the user stops rotating the operated component 26. During this process, the operated component 26 drives the second pusher 252 to move radially from top to bottom. The toothbrush rotates counterclockwise, causing the second forced pusher 252 to drive the second forced pusher 253 to move radially toward the main housing 104. Finally, the connecting part of the second forced pusher 253 contacts and connects with the main housing 104. After the above adjustment, the adjustment component 23 acts as a bridge. Inside the electric toothbrush 100, the first adjustment component 24 and the second adjustment component 25 connect the outer shell 21 to the main housing 104, and the outer shell 21 and the inner shell 22 are not connected. That is, the movement trend of the outer shell 21 can be consistent with the movement trend of the main housing 104.

[0043] Turn on the power in this state, such as Figure 5A As shown, the electric toothbrush 100 enters rotation mode, that is, the brush head 10 reciprocates and rotates relative to the outer casing 21 around the central axis 10a, i.e. Figure 5AThe brush head 10 rotates along the r1 or r2 direction, but the outer shell 21 and the central axis 10a remain stationary relative to the main shell 104. Specifically, the input arm 103 drives the inner shell 22 to reciprocate around the central axis 104a / 103a / 22a relative to the main shell 104 and the outer shell 21. At the same time, the inner shell 22 drives the eccentric rod 28 to reciprocate around the central axis 28a. Thus, under the drive of the eccentric rod 28, the brush head 10 has a tendency to move. However, since the outer shell 21 is stationary, the outer shell 21 restricts the brush head 10 from rotating around the central axis 104a / 103a / 22a relative to the main shell 104. Guided by the mounting hole 213 on the outer shell 21, the brush head 10 reciprocates around the central axis 10a within a certain angle range relative to the outer shell 21. Furthermore, the mounting groove 121 on the brush head assembly part 12 also guides the rotation of the brush head 10. In this mode, the brush head 10 rotates back and forth on a flat surface, which facilitates cleaning of the tooth surface; at the same time, in this mode, using... Figure 5A The circular brush head described above enables users to obtain better results.

[0044] Oscillating Mode: When switching the electric toothbrush 100 to oscillating mode, to provide a better user experience, the user can replace the toothbrush with a suitable replacement material. Figure 5C The long brush head is described above. When switching to the oscillating mode, the user needs to rotate the operated component 26 clockwise from a perspective facing the operated component 26. After the operated component 26 rotates, it drives the first pushing component 242 to rotate counterclockwise from a top-down view. Then, the first pushing component 242 drives the first forced pushing component 243 to move radially towards the inner shell 22 until the first connecting part 2431 of the first forced pushing component 243 contacts and connects with the inner shell 22. At this time, the user stops rotating the operated component 26. During this process, the operated component 26 drives the second pushing component... The second pusher 252 rotates clockwise when viewed from top to bottom, thereby driving the second forced pusher 253 to move radially toward the outer shell 21. Finally, the connecting part of the second forced pusher 253 contacts and connects with the outer shell 21. After the above adjustment, the adjustment component 23 acts as a bridge. Inside the electric toothbrush 100, the first adjustment component 24 and the second adjustment component 25 connect the inner shell 22 and the outer shell 21, that is, the movement trend of the outer shell 21 can be consistent with the movement trend of the inner shell 22.

[0045] Turn on the power in this state, such as Figure 5BAs shown, the electric toothbrush 100 enters the oscillation mode, meaning the brush head 10 and the outer shell 21 reciprocate and rotate relative to the main housing 104 around the central axis 104a / 103a / 22a. Specifically, the input arm 103 drives the inner shell 22, which in turn drives the eccentric rod 28 and the outer shell 21 to oscillate reciprocally relative to the main housing 104 around the central axis 104a / 103a / 22a. Thus, the brush head 10, driven simultaneously by the outer shell 21 and the eccentric rod 28, moves like... Figure 5B As shown, the brush head 100 oscillates back and forth, while its central axis 10a also oscillates relative to the main housing 104. This oscillation pattern of the electric toothbrush 100 facilitates the cleaning of the interdental spaces between teeth by the brush head 10.

[0046] Thus, the electric toothbrush 100 enables the brush head 10 to switch between the two aforementioned motion modes, allowing users to choose a motion mode for teeth cleaning based on their own usage habits.

[0047] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. It should be noted that those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features without departing from the principles of the present invention; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An electric toothbrush, comprising a brush head assembly and a handle assembly connected to each other, the brush head assembly comprising a brush head and a brush handle connected to each other, the brush handle being connected to the handle assembly, the handle assembly comprising a main housing, a drive device, and an input arm, the drive device being disposed within the main housing for providing a driving force for movement to the input arm, the input arm being used to transmit the driving force to the brush handle, characterized in that, The brush handle includes an inner shell and an outer shell. A portion of the input arm is disposed within the main shell, and another portion extends out of the main shell and into the inner shell. The outer shell covers the inner shell. The electric toothbrush is also provided with an adjustment component, which is used to adjust the brush head relative to the main shell to switch between a rotation mode and a swing mode. Along the length of the electric toothbrush, the adjustment component is disposed between the inner shell and the main shell. The outer shell covers at least a portion of the adjustment component. The adjustment component can be adjusted to connect or disconnect the outer shell from the inner shell. The adjustment assembly includes a first adjustment assembly and a second adjustment assembly coupled to each other along the length of the electric toothbrush, and at least one operable element disposed between the first adjustment assembly and the second adjustment assembly. The first adjustment assembly includes a first housing, a first pushing member, and at least one first forced pushing member. The first forced pushing member is mounted on the first housing in a radially movable manner relative to the first housing, and the first housing restricts the circumferential movement of the first forced pushing member. The first pushing member is disposed within the first housing and is used to push the first forced pushing member radially to move closer to or away from the inner housing. The second adjustment assembly includes a second housing, a second pushing member, and at least one second forced pushing member. The second forced pushing member is mounted on the second housing in a radially movable manner relative to the second housing, and the second housing restricts the circumferential movement of the second forced pushing member. The second pushing member is disposed within the second housing and is used to push the second forced pushing member radially to move closer to or away from the outer housing. The operable element includes a force receiving part for receiving a rotational force applied by the user and a transmission part for being drivenly connected to the first pushing member and the second pushing member, respectively. In rotation mode, the operated component drives the first pusher to rotate, and the first pusher drives the first forced pusher to move radially toward the outer shell until the second connecting part of the first forced pusher contacts and connects with the outer shell. At the same time, the operated component drives the second pusher to rotate, and the second pusher drives the second forced pusher to move radially toward the main shell until the first connecting part of the second forced pusher contacts and connects with the main shell. At this time, the outer shell is connected to the main shell. In the swing mode, the operated member drives the first push member to rotate, and the first push member drives the first forced push member to move radially towards the inner shell until the first connecting part of the first forced push member contacts and connects with the inner shell. At the same time, the operated member drives the second push member to rotate, and the second push member drives the second forced push member to move radially towards the outer shell until the second connecting part of the second forced push member contacts and connects with the outer shell. At this time, the outer shell and the inner shell are connected. The first connecting portion of the first forced push member and the second connecting portion of the first forced push member are arranged at a distance from each other in the radial direction, and the first connecting portion of the second forced push member and the second connecting portion of the second forced push member are arranged at a distance from each other in the radial direction.

2. The electric toothbrush according to claim 1, characterized in that, The first adjustment component and the second adjustment component are arranged along the length of the electric toothbrush, with the first adjustment component located above the second adjustment component.

3. The electric toothbrush according to claim 2, characterized in that, The first pusher includes a first driven part, a first guide rail part, and a first spacer part for separating the first driven part and the first guide rail part. The first driven part and the first guide rail part are arranged facing away from each other on the first spacer part. The first driven part is used to receive the transmission force to make the first pusher rotate. The first spacer part is configured as an annular structure with an inner circle and an outer circle sharing a common center. Along the clockwise or counterclockwise direction viewed from top to bottom, the distance from a point on the first guide rail part to the center of the first spacer part gradually increases.

4. The electric toothbrush according to any one of claims 1-3, characterized in that, An eccentric rod is provided between the inner shell and the brush head. The eccentric rod is detachably installed on the inner shell to connect the inner shell and the brush head. The eccentric rod is non-coaxially connected to the inner shell.

5. The electric toothbrush according to any one of claims 1-3, characterized in that, The brush head is detachably mounted on the brush handle.

6. The electric toothbrush according to any one of claims 1-3, characterized in that, The brush head is equipped with a sensor, which is used to send a stop signal to the electric toothbrush when it comes into contact with the brush head, so that the electric toothbrush stops working.

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