Oral care device and drive arrangement

Abstract

The utility model relates to oral care equipment and a driving device.The oral care equipment comprises a handle and a brush head, the handle comprises a shell and the driving device, and the brush head is arranged at the end of the handle; the driving device comprises a supporting seat, an output shaft, a resonance unit, a power unit and a limiting unit. The output shaft extends along the first axis and is rotationally connected to the supporting base. The resonance unit comprises a first resonance part and a second resonance part which are arranged at an interval along a first axis, and a connecting shaft for connecting the first resonance part and the second resonance part; when the power unit excites the second resonance part to rotate, the first resonance part is driven by the connecting shaft to rotate in different directions, so that the first resonance part and the second resonance part resonate; the output shaft is driven by the first resonance part to rotate back and forth relative to the supporting seat; the limiting unit is arranged on the resonance unit and / or the power unit and / or the supporting base and used for limiting the rotational degree of freedom of the output shaft relative to the supporting base.

Description

Technical Field

[0001] This disclosure relates to the field of oral care equipment technology, specifically to an oral care device and a drive mechanism. Background Technology

[0002] As living standards improve, people are becoming more aware of oral care, and the variety of oral cleaning tools on the market is increasing. Taking electric toothbrushes as an example, the drive mechanism in the handle can drive the brush head to swing or vibrate. When brushing their teeth, users hold the handle and press the brush head onto their teeth to clean them.

[0003] In existing technologies, the drive device can drive the brush head to reciprocate and twist based on the principle of resonance. For this type of drive device, if the brush head is rotated excessively when manually rotated, it will not be able to return to its normal position, resulting in a loss of power in the drive device, damaging the electric toothbrush and preventing it from continuing to work normally. Utility Model Content

[0004] This disclosure provides an oral care device and a drive mechanism to address the problems existing in the prior art.

[0005] According to a first aspect of this disclosure, an oral care device is provided, including a handle and a brush head, the handle including a housing and a drive mechanism, the brush head being disposed at an end of the handle; the drive mechanism comprising:

[0006] The support base is installed inside the housing;

[0007] An output shaft extends along a first axis and is configured to be rotatably connected to the support; the brush head is configured to be connected to the output shaft;

[0008] A resonant unit is disposed on the support base. The resonant unit includes a first resonant portion and a second resonant portion spaced apart along the first axis, and a connecting shaft for connecting the first resonant portion and the second resonant portion. The first resonant portion is configured to be connected to the output shaft.

[0009] A power unit is disposed on the support base, and the power unit is disposed on the side of the resonance unit away from the output shaft and connected to the second resonance part; when the power unit excites the second resonance part to rotate, the first resonance part is driven to rotate in the opposite direction through the connecting shaft, so that the first resonance part and the second resonance part resonate; the output shaft is configured to reciprocate relative to the support base under the driving action of the first resonance part;

[0010] A limiting unit is disposed on the resonant unit and / or the power unit and / or the support base, and is configured to limit the rotational degree of freedom of the output shaft relative to the support base.

[0011] In one embodiment of this disclosure, the power unit includes a coil and a stator assembly fixed on the support base. The stator assembly includes a first stator and a second stator spaced apart along a second axis, the second axis being perpendicular to the first axis in a horizontal plane. A rotor assembly is rotatably connected between the first stator and the second stator. The rotor assembly includes a rotor body connected to the second resonant part, and a first permanent magnet and a second permanent magnet with opposite magnetic poles are provided on opposite sides of the rotor body.

[0012] When the coil is not energized, the first permanent magnet and the second permanent magnet are symmetrical along the first axis and correspond to the first stator and the second stator, respectively; when the coil is energized, the first stator and the second stator are configured to generate opposite magnetic poles so as to drive the rotor body to reciprocate through the first permanent magnet and the second permanent magnet.

[0013] In one embodiment of this disclosure, when the limiting unit is at least provided in the power unit, the limiting unit is configured to restrict the rotational degree of freedom of the rotor body relative to the stator assembly.

[0014] In one embodiment of this disclosure, the limiting unit is a flange disposed on the rotor body; when the coil is not energized, the flange does not contact the first stator or the second stator, and in the circumferential direction, the flange is equidistant from the first stator or the second stator; the flange is configured to rotate to abut against the first stator or the second stator to restrict the rotational freedom of the rotor body relative to the stator assembly.

[0015] In one embodiment of this disclosure, two flanges are provided, which are symmetrically arranged on opposite sides of the rotor body along a first axis; when one of the flanges rotates to abut against the first stator, the other flange is configured to abut against the second stator.

[0016] In one embodiment of this disclosure, the first resonant part includes a first elastic element and a first mass block fixedly connected together, the first mass block being configured to be connected to the output shaft; the second resonant part includes a second elastic element and a second mass block fixedly connected together, the second mass block being configured to be connected to the power unit; the first elastic element is connected to the second elastic element through the connecting shaft.

[0017] In one embodiment of this disclosure, when the limiting unit is at least disposed on the resonant unit, the limiting unit is configured to restrict the rotational degrees of freedom of the first mass block and / or the second mass block relative to the support.

[0018] In one embodiment of this disclosure, the limiting unit includes an arcuate groove disposed on the first mass block and / or the second mass block, and a mating member disposed on the support base; two arcuate grooves are disposed on the same mass block, and in a static state, the two arcuate grooves are symmetrical along the first axis; the mating member is configured to extend into each of the arcuate grooves respectively; the first mass block and / or the second mass block is configured to abut against the mating member when rotated to the maximum rotation angle.

[0019] In one embodiment of this disclosure, the support base includes a first support frame having a first through hole extending along the first axis; a bearing is installed in the first through hole, and at least a portion of the output shaft is rotatably supported in the first through hole by the bearing.

[0020] In one embodiment of this disclosure, the limiting unit is disposed on the inner wall of the bearing and / or the first through hole to restrict the rotational degree of freedom of the output shaft.

[0021] In one embodiment of this disclosure, the output shaft is configured to reciprocate relative to the support base along a first direction and a second direction; the limiting unit is configured to restrict the rotational degrees of freedom of the output shaft in the first direction and the second direction respectively; the maximum rotation angle of the output shaft in the first direction and the second direction are equal.

[0022] In one embodiment of this disclosure, the limiting unit is configured to limit the maximum rotation angle of the output shaft relative to the support to 80°.

[0023] In one embodiment of this disclosure, the limiting unit is configured to limit the maximum rotation angle of the output shaft relative to the support to 30°.

[0024] According to a second aspect of this disclosure, a driving device is also provided, comprising:

[0025] Support base;

[0026] An output shaft extends along a first axis and is configured to be rotatably connected to the support.

[0027] A resonant unit is disposed on the support base. The resonant unit includes a first resonant portion and a second resonant portion spaced apart along the first axis, and a connecting shaft for connecting the first resonant portion and the second resonant portion. The first resonant portion is configured to be connected to the output shaft.

[0028] A power unit is disposed on the support base, and the power unit is disposed on the side of the resonance unit away from the output shaft and connected to the second resonance part; when the power unit excites the second resonance part to rotate, the first resonance part is driven to rotate in the opposite direction through the connecting shaft, so that the first resonance part and the second resonance part resonate; the output shaft is configured to reciprocate relative to the support base under the driving action of the first resonance part;

[0029] A limiting unit is disposed on the resonant unit and / or the power unit and / or the support base, and is configured to limit the rotational degree of freedom of the output shaft relative to the support base.

[0030] According to a third aspect of this disclosure, an oral care device is also provided, including a handle and a brush head, the handle including a housing and a drive mechanism, the brush head being disposed at an end of the handle; the drive mechanism comprising:

[0031] The support base is installed inside the housing;

[0032] An output shaft extends along a first axis and is configured to be rotatably connected to the support; the brush head is configured to be connected to the output shaft; a hollow flow channel extending along the first axis is provided within the output shaft;

[0033] A resonant unit is disposed on the support base. The resonant unit includes a first resonant portion and a second resonant portion spaced apart along the first axis, and a connecting shaft for connecting the first resonant portion and the second resonant portion. The first resonant portion is configured to be connected to the output shaft.

[0034] A power unit is disposed on the support base, and the power unit is disposed on the side of the resonance unit away from the output shaft and connected to the second resonance part; when the power unit excites the second resonance part to rotate, the first resonance part is driven to rotate in the opposite direction through the connecting shaft, so that the first resonance part and the second resonance part resonate; the output shaft is configured to reciprocate relative to the support base under the driving action of the first resonance part;

[0035] A limiting unit is disposed on the resonant unit and / or the power unit and / or the support base, and is configured to limit the rotational degree of freedom of the output shaft relative to the support base.

[0036] In one embodiment of this disclosure, the housing is provided with a liquid storage chamber and a pump communicating with the liquid storage chamber; the pump is configured to communicate with the hollow flow channel and is configured to pump liquid in the liquid storage chamber through the hollow flow channel to the brush head.

[0037] One beneficial effect of this disclosure is that by setting a limiting unit, the rotational freedom of the output shaft relative to the support can be restricted. When the brush head is manually rotated, or accidentally rotated under external force, the limiting device can limit and stop the brush head and output shaft from excessive rotation, thereby preventing power failure of the drive device and extending the service life of the oral care device and its drive device. In addition, this disclosure sets the limiting unit in the resonance unit and / or the power unit and / or the support. These structures are all original components of the drive device. It can be seen that this disclosure achieves the limiting function based on the original parts, through the cooperation between the parts, thereby avoiding the complexity of the process caused by adding new parts.

[0038] Other features and advantages of this disclosure will become clear from the following detailed description of exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0039] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments of the present disclosure and, together with their description, serve to explain the principles of the present disclosure.

[0040] Figure 1 This is a schematic diagram of the structure of an oral cleaning device provided in an embodiment of the present disclosure;

[0041] Figure 2 This is a schematic diagram of the structure of a driving device provided in an embodiment of this disclosure;

[0042] Figure 3 yes Figure 2 A magnified view of a portion of point A in the middle;

[0043] Figure 4 This is a top view of a driving device provided in an embodiment of the present disclosure;

[0044] Figure 5 A cross-sectional view of a driving device provided in an embodiment of this disclosure;

[0045] Figure 6 This is an exploded view of a driving device provided in an embodiment of this disclosure;

[0046] Figure 7 This is a schematic diagram of the internal structure of an oral cleaning device provided in an embodiment of the present disclosure.

[0047] Figures 1 to 7 The one-to-one correspondence between the component names and the reference numerals in the figures is as follows:

[0048] 100. Handle; 101. Housing; 102. Liquid storage chamber; 103. Pump; 200. Brush head; 300. Drive device; 1. Support base; 10. Base; 11. First support frame; 12. Second support frame; 13. Bearing; 2. Output shaft; 21. Hollow flow channel; 31. First resonant part; 311. First elastic element; 312. First mass block; 32. Second resonant part; 321. Second elastic element; 322. Second mass block; 33. Connecting shaft; 41. Coil; 421. First stator; 422. Second stator; 430. Rotor body; 431. First permanent magnet; 432. Second permanent magnet; 5. Flange; 61. Arc groove; 62. Mating part. Detailed Implementation

[0049] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present disclosure.

[0050] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this disclosure or its application or use.

[0051] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0052] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0053] In this article, terms such as "up," "down," "front," "back," "left," and "right" are used only to indicate the relative positional relationship between related parts, rather than to define the absolute position of these related parts.

[0054] In this article, "first," "second," etc., are used only to distinguish one another, and not to indicate degree of importance, order, or prerequisite for each other.

[0055] In this document, terms such as “equal” and “same” are not strict mathematical and / or geometric limitations, but also include errors that are understandable to those skilled in the art and permissible in manufacturing or use.

[0056] This disclosure provides an oral care device, which can be an electric toothbrush, a water flosser / flushing device, or other oral hygiene appliances. (See reference...) Figure 1 , Figure 2 and Figure 7The oral care device includes a handle 100 and a brush head 200. The handle 100 includes a housing 101 and a drive unit 300, and the brush head 200 is disposed at the end of the handle 100. Users can hold the housing 101 of the handle 100 to operate the oral care device. The housing 101 may have an inner cavity to accommodate various components of the handle 100.

[0057] like Figure 2 As shown, the drive unit 300 includes: a support base 1, an output shaft 2, a resonance unit, a power unit, and a limiting unit. The support base 1 is installed within the housing 101, and other components of the drive unit 300 can be installed within the housing 101 via the support base 1. The output shaft 2 extends along a first axis and is configured to be rotatably connected to the support base 1. The brush head 200 of the oral care device is configured to be connected to the output shaft 2. The first axis is... Figure 2 In the X-axis direction shown, the drive device 300 can output oscillating power through the output shaft 2. The output shaft 2 is configured to reciprocate relative to the support base 1 about the first axis and along the first and second directions, thereby outputting oscillating power. The free end of the output shaft 2 extends out of the housing 101 and connects to the brush head 200 to drive the brush head 200 to vibrate. Taking an electric toothbrush as an example of an oral care device, users can easily clean their teeth without swinging their wrists while brushing, ensuring a cleaning effect.

[0058] In one embodiment of this disclosure, reference is made to Figure 2 and Figure 6 The support base 1 includes a base 10, a first support frame 11, and a second support frame 12. The first support frame 11 and the second support frame 12 are respectively fixed to the base 10. The first support frame 11 can be used to mount the output shaft 2, and the second support frame 12 can be used to mount the power unit. (Reference) Figure 5 and Figure 6 The first support frame 11 has a first through hole extending along a first axis, and a bearing 13 is installed in the first through hole. At least a portion of the output shaft 2 is rotatably supported in the first through hole by the bearing 13. Specifically, the output shaft 2 passes through the bearing 13 and the first through hole along the first axis. The bearing 13 can limit the output shaft 2 to rotate only about the first axis and prevent it from displacing relative to the support 1 in other directions.

[0059] refer to Figure 2 , Figures 4 to 6The resonant unit is disposed on the support base 1. The resonant unit includes a first resonant part 31 and a second resonant part 32 spaced apart along a first axis, and a connecting shaft 33 for connecting the first resonant part 31 and the second resonant part 32. The first resonant part 31 is configured to be connected to the output shaft 2. Specifically, the first resonant part 31 includes a first elastic member 311 and a first mass block 312 fixedly connected. The first mass block 312 is configured to be connected to the output shaft 2. One end of the output shaft 2 is connected to the first mass block 312, and the other end passes through the bearing 13 and is connected to the brush head 200. It can be seen that the brush head 200, the output shaft 2, and the first mass block 312 are fixed together. During the rotation of the first mass block 312, the brush head 200 can be driven to rotate through the output shaft 2; and when the brush head 200 rotates under the action of external force, it can also drive the first mass block 312 to rotate together.

[0060] Furthermore, the second resonant part 32 includes a second elastic element 321 and a second mass block 322 fixedly connected together. The second mass block 322 is configured to be connected to the power unit. The first elastic element 311 is connected to the second elastic element 321 via a connecting shaft 33. In a direction gradually moving away from the output shaft 2, the first mass block 312, the first elastic element 311, the connecting shaft 33, the second elastic element 321, and the second mass block 322 are arranged sequentially on the first axis. The connecting shaft 33 connects the first resonant part 31 and the second resonant part 32 together, thereby enabling resonance between them. Both the first resonant part 31 and the second resonant part 32 are suspended relative to the support base 1, allowing them to rotate relative to the support base 1.

[0061] A power unit is mounted on the support base 1, located on the side of the resonance unit away from the output shaft 2, and connected to the second resonance part 32. When the power unit excites the second resonance part 32 to rotate, it drives the first resonance part 31 to rotate in the opposite direction via the connecting shaft 33, so that the first resonance part 31 and the second resonance part 32 resonate. The output shaft 2 is configured to reciprocate relative to the support base 1 under the driving action of the first resonance part 31. The power unit can be connected to the second mass block 322, thereby driving the second mass block 322 and the second elastic element 321 to rotate about the first axis. During rotation, the second elastic element 321 undergoes torsional deformation. Force can be transmitted along the connecting shaft 33 to the first elastic element 311, causing the first elastic element 311 to undergo opposite torsional deformation. The elastic force generated during the opposite torsional deformation of the first elastic element 311 can drive the first mass block 312 to rotate in the opposite direction to the second mass block 322.

[0062] The resonance unit of this disclosure vibrates in a torsional mode. The first elastic element 311 and the second elastic element 321 can rotate in opposite directions, with a 180° phase difference between their directions of motion. That is, when the second elastic element 321 rotates clockwise, the first elastic element 311 can rotate counterclockwise under resonance, and vice versa. Therefore, when the power unit drives the second resonance part 32 to reciprocate, the first resonance part 31 can reciprocate in the opposite direction to the second resonance part 32 under resonance, driving the output shaft 2 to reciprocate as well, thus realizing the sweeping vibration function of the brush head 200. In the resonance unit used in this disclosure, the torques of the first resonance part 31 and the second resonance part 32 can cancel each other out, thereby reducing harmful vibrations of the drive device 300. Furthermore, this disclosure does not impose specific restrictions on the shape of the first mass block 312 and the second mass block 322, nor does it impose specific requirements on the dimensions of the first elastic element 311 and the second elastic element 321. Their specific parameters need to be designed to match the actual resonant frequency.

[0063] In one embodiment of this disclosure, reference is made to Figure 2 , Figure 4 and Figure 6 The power unit includes a coil 41 fixed on a support base 1 and a stator assembly. The stator assembly includes a first stator 421 and a second stator 422 spaced apart along a second axis. The second axis is perpendicular to the first axis in a horizontal plane. Figure 2 The Y-axis direction is shown. Specifically, the stator assembly can be installed and fixed by the second support frame 12. A rotor assembly is rotatably connected between the first stator 421 and the second stator 422. The rotor assembly includes a rotor body 430 connected to the second resonant part 32. A first permanent magnet 431 and a second permanent magnet 432 with opposite magnetic poles are provided on opposite sides of the rotor body 430. Specifically, the rotor body 430 can be an iron core or a rotor made of other magnetizable materials, and the first permanent magnet 431 and the second permanent magnet 432 can be two magnets with opposite magnetic poles. When the coil 41 is not energized, the first permanent magnet 431 and the second permanent magnet 432 are symmetrical along the first axis and correspond to the first stator 421 and the second stator 422 respectively; when the coil 41 is energized, the first stator 421 and the second stator 422 are configured to generate opposite magnetic poles to drive the rotor body 430 to reciprocate through the first permanent magnet 431 and the second permanent magnet 432.

[0064] The first permanent magnet 431 and the second permanent magnet 432 are artificially endowed with opposite magnetic poles; for example, the first permanent magnet 431 is the N pole and the second permanent magnet 432 is the S pole. The first stator 421 and the second stator 422 are respectively connected to the coil 41. When the coil 41 is energized by the DC power supply of the battery, according to the principle of electromagnetism, the first stator 421 and the second stator 422 can generate opposite magnetic poles, thereby generating tangential force and forming torque, which in turn drives the first permanent magnet 431 and the second permanent magnet 432 to drive the rotor body 430 to reciprocate around the first axis. The rotor body 430 is connected to the second resonant part 32, thereby driving the output shaft 2 to reciprocate through the driving resonant unit.

[0065] As described in the background section of this disclosure, when the brush head 200 is rotated by human intervention or external force, the brush head 200 drives the output shaft 2, the first resonant part 31, the second resonant part 32, the rotor body 430, and other structures to rotate synchronously. If the rotation is excessive (e.g., 360°), the above components will not be able to reset properly, causing the drive device 300 to fail. To solve this problem, this disclosure provides a limit unit.

[0066] Specifically, the limiting unit is disposed in the resonance unit and / or the power unit and / or the support base 1, and is configured to limit the rotational degree of freedom of the output shaft 2 relative to the support base 1. This disclosure, by providing the limiting unit, can limit the rotational degree of freedom of the output shaft 2 relative to the support base 1. When the brush head 200 is manually rotated, or accidentally rotated under external force, the limiting device can play a limiting and stopping role, preventing the brush head 200 and the output shaft 2 from rotating excessively, thereby avoiding power failure of the drive device 300 and extending the service life of the oral care device and its drive device 300. Furthermore, this disclosure places the limiting unit in the resonance unit and / or the power unit and / or the support base 1. These structures are all original components of the drive device 300. Therefore, this disclosure achieves the limiting function based on the existing parts through the cooperation between the parts, thereby avoiding the complexity of the process caused by adding new parts.

[0067] The following will detail the specific settings and structures of the three limiting units. It should be noted that the following three specific structures are only examples. The limiting unit can also be any other structure known to those skilled in the art that can restrict the rotational degrees of freedom of the output shaft 2.

[0068] In one embodiment of this disclosure, when the limiting unit is provided at least in the power unit, the limiting unit is configured to restrict the rotational degree of freedom of the rotor body 430 relative to the stator assembly. When the brush head 200 rotates under the action of an external force, it can drive the resonant unit and the rotor body 430 to rotate together. When the rotor body 430 rotates to the limit position relative to the stator assembly, the rotor body 430 cannot continue to rotate under the action of the limiting unit, and the resonant unit and the output shaft 2 also cannot continue to rotate, thereby realizing the restriction of the rotational degree of freedom of the output shaft 2 relative to the support 1.

[0069] In one specific embodiment of this disclosure, reference is made to Figure 2 and Figure 6 The limiting unit is a flange 5 disposed on the rotor body 430. When the coil 41 is not energized, the flange 5 does not contact the first stator 421 or the second stator 422, and the distance between the flange 5 and the first stator 421 and the second stator 422 is equal in the circumferential direction. The flange 5 is configured to rotate to abut against the first stator 421 or the second stator 422 to restrict the rotational freedom of the rotor body 430 relative to the stator assembly. The flange 5 is fixed to the surface of the rotor body 430, or the flange 5 can be integrally formed with the device body 430, and the flange 5 can rotate synchronously with the rotor body 430. During normal operation, the rotor body 430 can reciprocate and rotate at a small angle, and the flange 5 will not come into contact with the first stator 421 or the second stator 422. However, when the rotor body 430 rotates abnormally by too large an angle under the action of external force, the flange 5 will abut against the first stator 421 or the second stator 422, thereby realizing the limiting function and preventing the rotor body 430 from rotating by too large an angle.

[0070] A single flange 5 can be provided. When the rotor body 430 rotates to its limit angle in the first direction, the flange 5 can abut against one of the first stator 421 and the second stator 422; and when the rotor body 430 rotates to its limit angle in the second direction, the flange 5 can abut against the other of the first stator 421 and the second stator 422. Thus, this disclosure can achieve a limiting function in two rotational directions by providing only one flange 5.

[0071] Preferably, such as Figure 6As shown, two flanges 5 can be provided, symmetrically arranged on opposite sides of the rotor body 430 along the first axis. When one flange 5 rotates to abut against the first stator 421, the other flange 5 is configured to abut against the second stator 422. The two flanges 5 can have identical shapes and structures, symmetrically arranged on opposite sides of the rotor body 430. In the initial state without power, one flange 5 is exposed above the middle of the two stators, and the other flange 5 is exposed below the middle of the two stators. When rotation occurs, one flange 5 can rotate away from the first stator 421 and towards the second stator 422, and the other flange 5 can rotate towards the first stator 421 and away from the second stator 422. When rotated to the limit position, the two flanges 5 abut against the two stators respectively, with one flange 5 abutting the upper side of the first stator 421 or the second stator 422, and the other flange 5 abutting the lower side of the other stator. This disclosure ensures that the center of gravity of the rotor body 430 is centered by symmetrically setting two flanges 5, thereby improving the rotational stability of the rotor body 430.

[0072] In another embodiment of this disclosure, when the limiting unit is at least provided in the resonant unit, the limiting unit is configured to restrict the rotational degrees of freedom of the first mass block 312 and / or the second mass block 322 relative to the support base 1. When the brush head 200 rotates under the action of an external force, it can drive the first mass block 312, the first elastic element 311, the second elastic element 321, and the second mass block 322 to rotate together. When the first mass block 312 and / or the second mass block 322 rotates to the limit position relative to the support base 1, the first mass block 312 and / or the second mass block 322 cannot continue to rotate under the action of the limiting unit, and also prevents other components of the resonant unit and the output shaft 2 from continuing to rotate, thereby achieving the restriction of the rotational degrees of freedom of the output shaft 2 relative to the support base 1.

[0073] In one specific embodiment of this disclosure, reference is made to Figures 2 to 4 and Figure 6 The limiting unit includes an arc-shaped groove 61 disposed on the first mass block 312 and / or the second mass block 322, and a mating part 62 disposed on the support base 1, wherein, as Figure 3As shown, the mating component 62 can be a flanged structure on the support base 1. Two arc-shaped grooves 61 are provided on the same mass block, and in the static state, the two arc-shaped grooves 61 are symmetrical along the first axis. The mating component 62 is constructed to extend into each arc-shaped groove 61, and the first mass block 312 and / or the second mass block 322 are configured to abut against the mating component 62 when rotated to the maximum rotation angle. Specifically, the arc-shaped groove 61 can be provided only on the first mass block 312, only on the second mass block 322, or simultaneously on both. The curvature of the arc-shaped groove 61 can be set according to the actual rotation path, and the depth of the arc-shaped groove 61 can be set according to the dimensions of the mating component 62.

[0074] refer to Figure 3 , Figure 4 and Figure 6 Taking the case where the arc-shaped groove 61 is provided on the first mass block 312 as an example, the first mass block 312 is provided with two arc-shaped grooves 61 symmetrically arranged along the first axis. The two arc-shaped grooves 61 can be located on the side of the first mass block 312 away from the first elastic member 311. Two mating members 62 are correspondingly provided on the support base 1. The two mating members 62 extend into their respective corresponding arc-shaped grooves 61. In the unpowered state or in the normal working state, the mating members 62 do not contact the first mass block 312, and there is a movable gap between them, so that the mating members 62 will not cause resistance to the normal rotation of the first mass block 312. When rotated to the limit position, the first mass block 312 rotates so that the inner wall surface of the arc-shaped groove 61 abuts against the mating member 62. Specifically, when rotated to the limit angle in the first direction, one side of the mating member 62 abuts against the inner wall surface of its corresponding arc-shaped groove 61; while when rotated to the limit angle in the second direction, the other side of the mating member 62 abuts against the inner wall surface of its corresponding arc-shaped groove 61. This disclosure achieves a limiting effect in two rotational directions by opening symmetrically arranged arc-shaped grooves 61.

[0075] In another embodiment of this disclosure, the limiting unit may also be disposed on the inner wall of the bearing 13 and / or the first through hole to restrict the rotational degree of freedom of the output shaft 2. For example, the bearing 13 has an inner ring and an outer ring that rotate relative to each other. The output shaft 2 can be fixed relative to the inner ring, and the support seat 1 can be fixed relative to the outer ring. In this case, the limiting unit can be configured to limit the maximum rotation angle between the inner and outer rings of the bearing 13, thereby limiting the rotational degree of freedom of the output shaft 2 relative to the support seat 1. In another specific embodiment, the bearing 13 can rotate relative to the support seat 1, so the limiting unit can be disposed on the inner wall of the first through hole to restrict the rotational degree of freedom of the bearing 13, thereby restricting the rotational degree of freedom of the output shaft 2 relative to the support seat 1.

[0076] In one embodiment of this disclosure, the limiting unit is configured to restrict the rotational degrees of freedom of the output shaft 2 in a first direction and a second direction, respectively, and the maximum rotation angle of the output shaft 2 in the first direction and the second direction are equal. As mentioned above, when the limiting unit is a flange 5 on the rotor body 430, whether there is one or two flanges 5, it can restrict the rotational degrees of freedom of the rotor body 430 in the first direction and the second direction, thereby restricting the rotational degrees of freedom of the output shaft 2. When the limiting unit is an arc groove 61 and a mating part 62, two arc grooves 61 are symmetrically arranged on the same mass block, and two mating parts 62 are correspondingly arranged on the support base 1, thereby restricting the rotational degrees of freedom of the first mass block 312 and / or the second mass block 322 in the first direction and the second direction, respectively, thereby restricting the rotational degrees of freedom of the output shaft 2.

[0077] The maximum rotation angle of the output shaft 2 in the first direction and the second direction are equal. Therefore, regardless of which direction the brush head 200 is subjected to rotational external force, the limiting unit can stop the rotation in time, avoiding power failure of the drive device 300. Specifically, the limiting unit is configured to limit the maximum rotation angle of the output shaft 2 relative to the support base 1 to 80°. Preferably, the limiting unit is configured to limit the maximum rotation angle of the output shaft 2 relative to the support base 1 to 30°.

[0078] This disclosure also provides a drive device 300, including: a support base 1, an output shaft 2, a resonance unit, a power unit, and a limiting unit. The output shaft 2 extends along a first axis and is configured to be rotatably connected to the support base 1; the resonance unit is disposed on the support base 1, and the resonance unit includes a first resonance portion 31 and a second resonance portion 32 spaced apart along the first axis, and a connecting shaft 33 for connecting the first resonance portion 31 and the second resonance portion 32; the first resonance portion 31 is configured to be connected to the output shaft 2; the power unit is disposed on the support base 1, and is disposed on the side of the resonance unit away from the output shaft 2 and connected to the second resonance portion 32; when the power unit excites the second resonance portion 32 to rotate, the connecting shaft 33 drives the first resonance portion 31 to rotate in the opposite direction, so that the first resonance portion 31 and the second resonance portion 32 resonate; the output shaft 2 is configured to reciprocate relative to the support base 1 under the driving action of the first resonance portion 31; the limiting unit is disposed on the resonance unit and / or the power unit and / or the support base 1, and is configured to limit the rotational freedom of the output shaft 2 relative to the support base 1.

[0079] The drive device 300 can be the drive device 300 in the oral care equipment described above. However, the drive device 300 can be used not only in oral care equipment, but also in other electrical equipment that requires limiting the rotational freedom of the output shaft 2. The specific structure and operation of each component in the drive device 300 have been described in detail above and will not be repeated here.

[0080] This disclosure also provides an oral care device, referenced Figure 7 Specifically, this oral care device can be an integrated flushing machine. The main difference between this device and the aforementioned embodiment is that a hollow flow channel 21 extending along the first axis is provided within the output shaft 2. Further, as... Figure 7 As shown, a liquid storage chamber 102 is provided inside the housing 101, and a pump 103 is connected to the liquid storage chamber 102. The pump 103 is configured to connect to the hollow flow channel 21 and is configured to pump the liquid in the liquid storage chamber 102 to the brush head 200 through the hollow flow channel 21.

[0081] Specifically, the brush head 200 may include bristle clusters for brushing teeth and nozzles located between the bristle clusters. The nozzles are connected to the hollow flow channel 21 of the output shaft 2 to form a water channel, allowing liquid to be ejected through the nozzles to clean between teeth. A liquid storage chamber 102 is disposed within the housing 101 and can be used to store fluids such as water, mouthwash, and oral care solution. The liquid in the storage chamber 102 can be pumped to the brush head 200 through the hollow flow channel 21 by the pump 103, thereby forming an impact fluid with a certain initial velocity at the nozzle. In this embodiment, the output shaft 2 not only outputs oscillating power to drive the bristle clusters on the brush head 200 to reciprocate during brushing, improving the brushing effect, but also provides a fluid passage during the rinsing process by providing the hollow flow channel 21.

[0082] The various embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical application, or technical improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein. The scope of this disclosure is defined by the appended claims.

Claims

1. An oral care device, characterized in that, Includes a handle (100) and a brush head (200), the handle (100) including a housing (101) and a drive device (300), the brush head (200) being disposed at the end of the handle (100); the drive device (300) including: A support base (1) is installed inside the housing (101); An output shaft (2) extends along a first axis and is configured to be rotatably connected to the support (1); the brush head (200) is configured to be connected to the output shaft (2); A resonance unit is disposed on the support base (1). The resonance unit includes a first resonance part (31) and a second resonance part (32) disposed at intervals along the first axis, and a connecting shaft (33) for connecting the first resonance part (31) and the second resonance part (32); the first resonance part (31) is configured to be connected to the output shaft (2). A power unit is disposed on the support base (1). The power unit is disposed on the side of the resonance unit away from the output shaft (2) and connected to the second resonance part (32). When the power unit excites the second resonance part (32) to rotate, the first resonance part (31) is driven to rotate in the opposite direction through the connecting shaft (33) so that the first resonance part (31) and the second resonance part (32) resonate. The output shaft (2) is configured to reciprocate relative to the support base (1) under the driving action of the first resonance part (31). A limiting unit is disposed on the resonant unit and / or the power unit and / or the support base (1) and is configured to limit the rotational degree of freedom of the output shaft (2) relative to the support base (1).

2. The oral care device according to claim 1, characterized in that, The power unit includes a coil (41) fixed on the support base (1) and a stator assembly. The stator assembly includes a first stator (421) and a second stator (422) spaced apart along a second axis, which is perpendicular to the first axis in a horizontal plane. A rotor assembly is rotatably connected between the first stator (421) and the second stator (422). The rotor assembly includes a rotor body (430) connected to the second resonant part (32). A first permanent magnet (431) and a second permanent magnet (432) with opposite magnetic poles are provided on opposite sides of the rotor body (430). When the coil (41) is not energized, the first permanent magnet (431) and the second permanent magnet (432) are symmetrical along the first axis and correspond to the first stator (421) and the second stator (422) respectively; when the coil (41) is energized, the first stator (421) and the second stator (422) are configured to generate opposite magnetic poles so as to drive the rotor body (430) to reciprocate through the first permanent magnet (431) and the second permanent magnet (432).

3. The oral care device according to claim 2, characterized in that, When the limiting unit is provided at least in the power unit, the limiting unit is configured to restrict the rotational degree of freedom of the rotor body (430) relative to the stator assembly.

4. The oral care device according to claim 3, characterized in that, The limiting unit is a flange (5) disposed on the rotor body (430); when the coil (41) is not energized, the flange (5) does not contact the first stator (421) or the second stator (422), and in the circumferential direction, the flange (5) is equidistant from the first stator (421) or the second stator (422); the flange (5) is configured to rotate to abut against the first stator (421) or the second stator (422) to restrict the rotational freedom of the rotor body (430) relative to the stator assembly.

5. The oral care device according to claim 4, characterized in that, Two flanges (5) are provided, and the two flanges (5) are symmetrically arranged on opposite sides of the rotor body (430) along the first axis; when one of the flanges (5) rotates to abut against the first stator (421), the other flange (5) is configured to abut against the second stator (422).

6. The oral care device according to claim 1, characterized in that, The first resonant part (31) includes a first elastic element (311) and a first mass block (312) fixedly connected, the first mass block (312) being configured to be connected to the output shaft (2); the second resonant part (32) includes a second elastic element (321) and a second mass block (322) fixedly connected, the second mass block (322) being configured to be connected to the power unit; the first elastic element (311) is connected to the second elastic element (321) through the connecting shaft (33).

7. The oral care device according to claim 6, characterized in that, When the limiting unit is at least provided on the resonant unit, the limiting unit is configured to restrict the rotational degrees of freedom of the first mass block (312) and / or the second mass block (322) relative to the support (1).

8. The oral care device according to claim 7, characterized in that, The limiting unit includes an arcuate groove (61) disposed on the first mass block (312) and / or the second mass block (322), and a mating member (62) disposed on the support base (1); two arcuate grooves (61) are disposed on the same mass block, and in the static state, the two arcuate grooves (61) are symmetrical along the first axis; the mating member (62) is configured to extend into each of the arcuate grooves (61); the first mass block (312) and / or the second mass block (322) are configured to abut against the mating member (62) when rotated to the maximum rotation angle.

9. The oral care device according to claim 1, characterized in that, The support base (1) includes a first support frame (11) having a first through hole extending along the first axis; a bearing (13) is installed in the first through hole, and at least a portion of the output shaft (2) is rotatably supported in the first through hole by the bearing (13).

10. The oral care device according to claim 9, characterized in that, The limiting unit is disposed on the inner wall of the bearing (13) and / or the first through hole to restrict the rotational freedom of the output shaft (2).

11. The oral care device according to any one of claims 1-10, characterized in that, The output shaft (2) is configured to reciprocate relative to the support base (1) in a first direction and a second direction; the limiting unit is configured to restrict the rotational degrees of freedom of the output shaft (2) in the first direction and the second direction respectively; the maximum rotation angle of the output shaft (2) in the first direction and the second direction is equal.

12. The oral care device according to claim 11, characterized in that, The limiting unit is configured to limit the maximum rotation angle of the output shaft (2) relative to the support (1) to 80°.

13. The oral care device according to claim 12, characterized in that, The limiting unit is configured to limit the maximum rotation angle of the output shaft (2) relative to the support (1) to 30°.

14. A driving device, characterized in that, include: Support base (1); The output shaft (2) extends along the first axis and is configured to be rotatably connected to the support (1); A resonance unit is disposed on the support base (1). The resonance unit includes a first resonance part (31) and a second resonance part (32) disposed at intervals along the first axis, and a connecting shaft (33) for connecting the first resonance part (31) and the second resonance part (32); the first resonance part (31) is configured to be connected to the output shaft (2). A power unit is disposed on the support base (1). The power unit is disposed on the side of the resonance unit away from the output shaft (2) and connected to the second resonance part (32). When the power unit excites the second resonance part (32) to rotate, the first resonance part (31) is driven to rotate in the opposite direction through the connecting shaft (33) so that the first resonance part (31) and the second resonance part (32) resonate. The output shaft (2) is configured to reciprocate relative to the support base (1) under the driving action of the first resonance part (31). A limiting unit is disposed on the resonant unit and / or the power unit and / or the support base (1) and is configured to limit the rotational degree of freedom of the output shaft (2) relative to the support base (1).

15. An oral care device, characterized in that, Includes a handle (100) and a brush head (200), the handle (100) including a housing (101) and a drive device (300), the brush head (200) being disposed at the end of the handle (100); the drive device (300) including: A support base (1) is installed inside the housing (101); An output shaft (2) extends along a first axis and is configured to be rotatably connected to the support (1); the brush head (200) is configured to be connected to the output shaft (2); a hollow flow channel (21) extending along the first axis is provided inside the output shaft (2). A resonance unit is disposed on the support base (1). The resonance unit includes a first resonance part (31) and a second resonance part (32) disposed at intervals along the first axis, and a connecting shaft (33) for connecting the first resonance part (31) and the second resonance part (32); the first resonance part (31) is configured to be connected to the output shaft (2). A power unit is disposed on the support base (1). The power unit is disposed on the side of the resonance unit away from the output shaft (2) and connected to the second resonance part (32). When the power unit excites the second resonance part (32) to rotate, the first resonance part (31) is driven to rotate in the opposite direction through the connecting shaft (33) so that the first resonance part (31) and the second resonance part (32) resonate. The output shaft (2) is configured to reciprocate relative to the support base (1) under the driving action of the first resonance part (31). A limiting unit is disposed on the resonant unit and / or the power unit and / or the support base (1) and is configured to limit the rotational degree of freedom of the output shaft (2) relative to the support base (1).

16. The oral care device according to claim 15, characterized in that, The housing (101) is provided with a liquid storage chamber (102) and a pump (103) communicating with the liquid storage chamber (102); the pump (103) is configured to communicate with the hollow flow channel (21) and is configured to pump the liquid in the liquid storage chamber (102) through the hollow flow channel (21) to the brush head (200).

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