CN217853447U

CN217853447U - Electric tooth brush

Info

Publication number: CN217853447U
Application number: CN202221948006.8U
Authority: CN
Inventors: 黄少东
Original assignee: Guangdong Alpha Health Technology Co ltd
Current assignee: Guangdong Alpha Health Technology Co ltd
Priority date: 2022-07-25
Filing date: 2022-07-25
Publication date: 2022-11-22
Anticipated expiration: 2032-07-25

Abstract

The utility model relates to an electric toothbrush, which comprises a handle, a brush head, a transmission shaft extending from the handle and used for connecting the brush head, and a driving device positioned in the handle, wherein the driving device comprises a power supply, a motor, a driving piece, a driven piece and a reset piece; the motor receives the power provided by the power supply and drives the driving piece to rotate around the second rotation axis; the driving piece drives the driven piece to rotate around the first rotation axis from the first position to the second position; the driving device uses a common motor to realize the predetermined function, so that the low cost of the driving device and the effective control of the swing angle of the brush head can be realized.

Description

Electric tooth brush

Technical Field

The utility model relates to an electric toothbrush.

Background

The electric toothbrush is a common oral care appliance for people, and comprises a handle and a brush head which are combined with each other, wherein a driving device is arranged in the handle, when the electric toothbrush works, the driving device drives the brush head to reciprocate around an axis parallel to the length direction of the electric toothbrush, and bristles arranged on the brush head move along with the brush head to clean teeth.

The driving device of the existing electric toothbrush is set as a magnetic suspension motor, and when the electric toothbrush works, the magnetic field control in the magnetic suspension motor is utilized to realize the vibration of the toothbrush head and the reciprocating swing around the axis.

SUMMERY OF THE UTILITY MODEL

For realizing the low cost of the driving device in the electric toothbrush and effectively controlling the swing angle of the brush head, the utility model adopts the following technical proposal:

the electric toothbrush comprises a handle, a brush head, a transmission shaft extending from the handle and used for connecting the brush head, and a driving device positioned in the handle, wherein the driving device comprises a power supply, a motor, a driving part, a driven part and a resetting part; the motor receives the power provided by the power supply and drives the driving piece to rotate around the second rotation axis; the driving piece drives the driven piece to rotate around the first rotation axis from the first position to the second position; the reset member is coupled to one of the drive shaft and the driven member for forcing the driven member to rotate about the first axis of rotation from the second position toward the first position after the drive member is disengaged from the driven member.

In some embodiments, the first axis of rotation and the second axis of rotation are parallel to each other.

In some embodiments, the reset piece is a torsion spring sleeved outside the transmission shaft.

In some embodiments, at least one of the driving member and the driven member is provided as a cam.

In some embodiments, at least one of a portion of the driving member contacting the driven member and a portion of the driven member contacting the driving member is provided as a rod-shaped member, preferably, at least one of a portion of the driving member contacting the driven member and a portion of the driven member contacting the driving member is made of plastic, and more preferably, at least one of a portion of the driving member contacting the driven member and a portion of the driven member contacting the driving member is externally coated with an elastic member.

In some embodiments, the portion of the driving member for contact with the driven member is provided in plural numbers arranged around the rotation direction of the driving member.

In some embodiments, the driving means comprises a pair of magnets disposed at the driving member and the driven member, respectively, and the driven member is driven by a magnetic force of the pair of magnets.

As described above, the driving apparatus of the electric toothbrush according to the present invention can drive the driven member by the driving member by rotating the driving member around the rotation axis using the general motor, and then drive the driving shaft by the driven member and the brush head connected to the driving shaft to reciprocate between the first position and the second position, so that the driving apparatus can be manufactured at low cost and the effective control of the swing angle of the brush head can be realized.

Drawings

Fig. 1 is a perspective view of an electric toothbrush according to the present invention.

Fig. 2 is a perspective view of the internal components of the electric toothbrush of the present invention after the brush head and the housing are hidden.

Fig. 3 is an exploded perspective view of the inner assembly of fig. 2.

Fig. 4 is a perspective view of the electric toothbrush driving device according to the present invention.

Fig. 5A and 5B are side views of the drive unit, taken along direction AA in fig. 4, when the driven member is in the first position and the second position, respectively, and viewed in a direction perpendicular to the rotational axis of the brush head.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is a perspective view of an electric toothbrush according to the present invention; FIG. 2 is a perspective view of the internal components of the electric toothbrush of the present invention after the brush head and housing have been hidden; fig. 3 is an exploded perspective view of the inner assembly of fig. 2.

The electric toothbrush 100 includes a handle 10, a brush head 20, and a driving shaft 30 extending from the handle 10 and for connecting the brush head 20, the handle 10 includes a housing 11, a holder 50 disposed in the housing 11, a driving device 40 supported by the holder 50, and a triggering device 12 combined with the housing 11 and exposed outside the housing 11, the triggering device 12 is for triggering the driving device 40, the driving device 40 drives the driving shaft 30 to rotate about a rotation axis/first rotation axis L1 (as shown in fig. 4) of the driving shaft 30, bristles 23 are disposed on the brush head 20, and the bristles 23 can move together with the brush head 20 when the brush head 20 is driven.

For the following description of the structure to be clear, the direction of the electric toothbrush 100 is defined with respect to the state in which the electric toothbrush 100 is normally placed, in which the brush head 20 is located above the handle 10 and the electric toothbrush 100 is integrally extended in the up-down direction.

As shown in fig. 3, the driving device 40 includes a power source 41, a motor 42, a driving member 43, a driven member 44 and a reset member 45, wherein the power source 41 can be any one of a common battery and a rechargeable battery, and when the power source 41 is a rechargeable battery, the electric toothbrush 100 further includes a charging hole 13 (shown in fig. 1) penetrating the housing 11, preferably, the charging hole 13 is disposed on the bottom surface of the housing 11, and the motor 42 is electrically connected to the power source 41, such that the motor 42 can receive the power of the power source 41 to drive the driving member 43 connected to the motor 42 to rotate around the second rotation axis L2; the restoring member 45 is used for providing a restoring force to the transmission shaft 30 so that the transmission shaft 30 can rotate around the second rotation axis L2 within a predetermined angle range, for example, in some embodiments, the restoring force may be a magnetic force, in which case, the restoring member 45 is a pair of magnets, one of the magnets is installed on the transmission shaft 30, and the other magnet is installed at a position outside the transmission shaft 30, optionally, the magnetic force may be an attractive force or a repulsive force, in other embodiments, the restoring force is an elastic force, in which case, the restoring member 45 is an elastic member combined with the transmission shaft 30, specifically, a compression spring, a tension spring or a torsion spring, in which fig. 3 shows an example in which the restoring member 45 is a torsion spring, as shown in the figure, the torsion spring 45 is sleeved outside the transmission shaft 30, one end of the torsion spring 45 is positioned in the positioning ring 31 combined with the transmission shaft 30, or one end of the torsion spring 45 is combined with the follower 44, and the other end of the torsion spring 45 is abutted with the bracket 50 or the housing 11, which can reduce the space occupied by the restoring member 45, and is beneficial to the miniaturization of the driving device 40.

Further, the transmission shaft 30 and the retainer 31 are preferably integrally formed, and the bracket 50 is provided with a receiving groove 23 matching the shapes of the transmission shaft 30, the retainer 31, the power source 41 and the motor 42, so that the transmission shaft 30, the power source 41 and the motor 42 can be more stably positioned in the housing 11, and the movement of the transmission shaft 30 is more stable when the driving device 40 and the restoring member 45 drive the transmission shaft 30 to move.

FIG. 4 is a perspective view of the electric toothbrush driving device according to the present invention; fig. 5A and 5B are side views of the drive unit, taken along direction AA in fig. 4, when the driven member is in the first position and the second position, respectively, and viewed in a direction perpendicular to the rotational axis of the brush head.

As shown in the enlarged schematic view of a part R in fig. 4, one end of the torsion spring 45 enters a positioning hole preset in the positioning ring 31, the driving device 40 further includes a transmission rod 421 extending from the motor 42, the driving member 43 is combined with the transmission rod 421, the driven member 44 is combined with the transmission shaft 30, and preferably, the driving member 43 and the transmission rod 421 and the driven member 44 and the transmission shaft 30 are directly combined, which is beneficial to reducing the space of the driving device 40 on one hand and improving the transmission efficiency of the driving force on the other hand; on the contrary, in the case of space allowance or driving force transmission efficiency allowance, the driving member 43 and the transmission rod 421 and the driven member 44 and the transmission shaft 30 may be indirectly coupled, for example, the driving member 43 and the transmission rod 431 are coupled through a connecting rod, a screw thread, or the like, or a control member for controlling the moving speed/direction of the driving member 43 is provided therebetween, and similarly, the driven member 44 and the transmission shaft 30 may be indirectly coupled.

In some embodiments, the rotation axis L1 and the rotation axis L2 are not coincident, and further, the rotation axis L1 and the rotation axis L2 are arranged parallel to each other, which is achievable, the rotation axis L1 and the rotation axis L2 may also be arranged non-parallel to each other, in this case, as long as the driven member 43 can transmit the driving force to the driven member 44, obviously, the rotation axis L1 and the rotation axis L2 are parallel to each other, which is more favorable for saving space, so that the electric toothbrush 100 can be miniaturized.

In some embodiments, the driving member 43 is a cam connected to the transmission rod 421, the cam is provided with a first protrusion 431, or the first protrusion 431 protrudes from the transmission rod 421, the driven member 44 is a cam connected to the transmission shaft 30, the cam is provided with a second protrusion 441, or the second protrusion 441 protrudes from the transmission shaft 30, and the driven member 44 is configured to reciprocate between a first position and a second position under the action of the reset member 45; it is understood that one of the driving member 43 and the driven member 44 is provided as a cam, and the other is provided as a member capable of being combined with the cam and transmitting a driving force.

As shown in fig. 5A, the driven member 44 is located at the first position, when the driving member 43 is driven to rotate in the direction r1, the first protrusion 431 drives the second protrusion 441 to further drive the driven member 44 to rotate around the rotation axis L2 in the direction r2, and simultaneously, the driven member 44 drives the transmission shaft 30 to rotate in the same direction, accordingly, the brush head 20 connected to the transmission shaft 30 also rotates in the same direction, and the torsion spring 45 elastically deforms; as shown in fig. 5B, when the driven member 44 reaches the second position, the first protrusion 431 is disengaged from the second protrusion 441, the driving member 43 is driven by the motor to continue to rotate in the direction indicated by r1, the torsion spring 45 releases the elastic force/restoring force, the driving shaft 30 drives the brush head 20 to rotate in the direction opposite to the direction indicated by r2, the driven member 44 returns to the first position, when the driving member 43 moves to the first protrusion 431 and the second protrusion 441 again, the driven member 44 is driven again and moves from the first position to the second position, the torsion spring 45 elastically deforms again, when the first protrusion 431 and the second protrusion 441 are disengaged again, the driving member 43 is driven by the motor 42 to rotate around the rotation axis L1 in the direction r1, and the driven member 44 drives the driving shaft 30/brush head 20 to reciprocate between the first position and the second position around the rotation axis L2.

In some embodiments, at least one of the driving member 43 and the driven member 44 may also be configured as a rod-shaped member protruding from the transmission rod 421, as long as it can be ensured that during the rotation of the driving member 43 around the rotation axis L2 in the direction r1 driven by the motor 42, the driving member 43 can interact with the driven member 44 to force the driven member 44 to drive the transmission shaft 30 to rotate around the rotation axis L1.

As shown in fig. 5A and 5B, the point of the driven member 44 farthest from the rotation axis L1 is P, and in fig. 5A and 5B, based on the connecting line between the point P and the rotation axis L1, it can be seen that the included angle α is formed between the first position and the second position of the driven member 44, that is, the angle α is the angle that the driven member 44/the transmission shaft 30/the brush head 20 can rotate, and the angle α is determined by the time length that the driven member 44 is pushed by the driving member 43, the longer the time length that the driven member 44 is pushed by the driving member 43, the larger the angle α is, and accordingly, the larger the angle that the brush head 20 rotates is, the shorter the time length that the driven member 44 is pushed by the driving member 43 is, the smaller the angle α is, and accordingly, the smaller the angle that the brush head 20 rotates is; more specifically, the purpose of extending the period of time that the driven member 44 is driven by the driving member 43 can be achieved by arranging the driving member 43 and the driven member 44 closer to or increasing the radial dimension of the first protrusion 431 and/or the second protrusion 441.

Further, in some embodiments, the driving member 43/the first protrusions 431 are provided in plural numbers arranged around the rotation direction r1, and thus, the plural first protrusions 431 respectively pull the driven members 44 in one rotation cycle of the driving member 43, so that the frequency of the reciprocating motion of the brush head 20 around the rotation axis L1 is higher.

Preferably, in the manner of transmitting the driving force by coupling and decoupling the driving member 43 and the driven member 44, at least one of the first protrusion 431 and the second protrusion 441 is made of plastic, so that the noise generated when the electric toothbrush is operated can be reduced while the friction force between the two is reduced; further, at least one of the first protrusion 431 and the second protrusion 441 is externally coated with an elastic member in order to further reduce noise generated when the electric toothbrush operates.

In some embodiments, the driving force transmission between the driving member 43 and the driven member 44 may be performed by a pair of magnets, one of which is mounted on the driving member 43 and the other of which is mounted on the driven member 44, and as the driving member 43 approaches the driven member 44, the driven member 44 is rotated around the rotation axis L1 by the magnetic attraction or repulsion therebetween, so that the driving shaft 30/the brush head 20 is rotated along with the rotation of the driven member 44. When the driving force is transmitted by the magnet, the driving member 43 and the driven member 44 do not need to be in contact with each other, and no friction force is generated between the driving member and the driven member, which is also beneficial to reducing the noise generated when the electric toothbrush works.

As described above, during the operation of the electric toothbrush 100, the driving member 43 only needs to be driven by the motor 42 to rotate in the direction r1, so that in the electric toothbrush 100 adopting the above technical solution, the above object can be achieved by selecting the common motor 42, and the overall cost of the electric toothbrush 100 can be greatly reduced; further, the angle α of rotation of the brush head 20 can be adjusted according to the length of time the driven member 44 is moved by the driving member 43, and thus the electric toothbrush 100 has a higher degree of freedom in design.

Claims

1. An electric toothbrush comprising a handle, a head, a drive shaft extending from the handle for connection to the head, and a drive means located in the handle,

the driving device comprises a power supply, a motor, a driving part, a driven part and a resetting part;

the motor receives the power provided by the power supply and drives the driving piece to rotate around the second rotation axis;

the driving piece drives the driven piece to rotate around the first rotation axis from the first position to the second position;

the reset member is coupled to one of the drive shaft and the driven member for urging the driven member to rotate about the first axis of rotation from the second position toward the first position after the drive member is disengaged from the driven member.

2. The powered toothbrush as defined in claim 1, wherein the first axis of rotation and the second axis of rotation are parallel to each other.

3. The electric toothbrush of claim 1, wherein the return element is a torsion spring sleeved outside the drive shaft.

4. The powered toothbrush as defined in claim 1, wherein at least one of the driving member and the driven member is configured as a cam.

5. The power toothbrush of claim 1, wherein at least one of a portion where the driving member contacts the driven member and a portion where the driven member contacts the driving member is provided as a rod-shaped member.

6. The electric toothbrush according to claim 4 or 5, wherein at least one of a portion of the driving member contacting the driven member and a portion of the driven member contacting the driving member is made of plastic.

7. The powered toothbrush as claimed in claim 6, wherein an elastic member is coated outside at least one of a portion of the driving member contacting the driven member and a portion of the driven member contacting the driving member.

8. The electric toothbrush according to claim 4 or 5, wherein the portion of the driving member for contacting the driven member is provided in plural numbers around the rotational direction of the driving member.

9. The power toothbrush as claimed in claim 1, wherein the driving means includes a pair of magnets respectively provided at the driving member and the driven member, the driven member being driven by a magnetic force of the pair of magnets.