ELECTRIC TOOTHBRUSH

Abstract

The present patent specification develops an electric toothbrush comprising a battery assembly and a main body, wherein the battery assembly comprises a battery, a battery holder, a charging coil and an electrical connecting part, wherein the battery is electrically connected to the electrical connecting part, the charging coil is electrically connected to the electrical connecting part and the battery is charged by an inductive current generated by the charging coil; the main body comprises a housing, a control plate and a battery cover, the control plate and the battery assembly are provided in a cavity of the housing, the battery cover closes the opening of the cavity, and the control plate is supplied with current via the electrical connecting part and the control plate.

Description

Technical area

[0001] The present invention relates to an electric toothbrush State of the art

[0002] Currently, rechargeable electric toothbrushes are the main products on the electric toothbrush market. An electric toothbrush typically consists of a replaceable brush head, a main body that serves as the brush handle, and a battery located inside the main body.

[0003] Because the components inside the main body aren't easily damaged, the electric toothbrush has a long service life. However, the battery, which is a wearable part, only has a lifespan of 2-3 years.

[0004] Chinese patent CN1572260A discloses a dental device in which the rear end of the main body has a battery compartment that can be opened and closed using a screw thread, allowing the battery to be replaced. However, the dental device itself cannot be recharged, and the battery must be replaced frequently.

[0005] Chinese Utility Model CN207855308U and Chinese Utility Model CN2390469Y also disclose electric toothbrushes, but the electric toothbrushes are powered by removable batteries, and the electric toothbrushes themselves cannot be directly charged and require frequent battery replacement. Contents of this utility model

[0006] The purpose of this patent is to develop a rechargeable electric toothbrush with easily replaceable batteries.

[0007] The present embodiment of the patent specification develops an electric toothbrush comprising: a battery assembly, the battery assembly comprising a battery, a battery holder, a charging coil, and an electrical connecting part, the battery, the charging coil, and the electrical connecting part being electrically connected to the battery holder, the battery being electrically connected to the electrical connecting part, the charging coil and the electrical connecting part being electrically connected to charge the battery by means of an induced current generated by the charging coil; and a main body, the main body comprising a housing, a control plate, and a battery cover, the housing having a cavity, the control plate and the battery assembly being provided in the cavity, the battery cover closing the empty opening of the cavity and being electrically connected to the control plate via the electrical connecting part and the control plate to supply power to the control plate.

[0008] In one possible embodiment, the electrical connecting part comprises electrical connecting part contacts, the control plate comprises control plate contact and the control plate contact is in contact with the electrical connecting part contact, so that the control plate and the electrical connecting part are electrically connected by contact connection.

[0009] In one possible embodiment, the electrical connection part is provided in front of the battery and the charging coil is provided on the back of the battery.

[0010] Preferably, the battery cover is installed in the empty opening using a thread or an interference fit.

[0011] In one possible embodiment, the electrical connection part further comprises a socket, wherein the battery is electrically connected to a plug, and the plug and the socket can be removed and connected.

[0012] In one possible embodiment, the socket and the electrical connector contact are provided on two sides of the electrical connector in opposite directions.

[0013] In one possible embodiment, the main body further comprises an inner bracket, wherein the control plate is provided in the inner bracket, wherein the inner bracket is provided on the inner wall of the housing.

[0014] In one possible embodiment, the inner holder and the battery holder are provided with a guide structure extending along the axial direction of the electric toothbrush, wherein the guide structure causes both the inner holder and the battery holder to slide relative to each other along the axial direction.

[0015] In one possible embodiment, the inner holder is provided with a spring, the spring being a compression spring, the spring being compressed in the state in which the battery assembly is mounted in the main body, so that the battery assembly has a tendency to be ejected from the cavity.

[0016] Preferably, the control plate contact and the electrical connection part contact resist elastically.

[0017] In one possible embodiment, the control plate contact has an inclined surface inclined in the forward and backward direction with respect to the control plate, wherein the front end of the inclined surface is closer to the electrical connection part contact than the rear end.

[0018] In one possible embodiment, the main body further comprises a battery cover and a bottom cover, wherein the battery cover is in the empty opening of the housing through the bottom cover, wherein the battery cover is connected to the bottom cover by a thread.

[0019] In one possible embodiment, the battery cover is provided with a rotary actuating part in the form of a groove on the rear end surface.

[0020] By applying the above technical solution, the electric toothbrush of the present patent specification can achieve at least one of the following advantageous effects. (1) The battery assembly and the main body are connected by an electrical connecting part, the battery assembly can be removed from the main body as a whole, and the service life of the electric toothbrush can be extended by replacing the battery. (2) The spring is compressed by the installation of the battery cover, so that the battery assembly remains stable in the cavity and does not wobble during use. (3) The guide structure ensures smooth operation when inserting and removing the battery assembly and provides a better user experience. Short description of the drawing Fig. 1 shows an exploded view of an electric toothbrush of an embodiment of the present patent specification. Fig. 2 is a schematic diagram showing the structure of a battery assembly and a control board of an electric toothbrush according to an embodiment of the present specification. Fig. 3 and Fig. 4 show schematic diagrams of the structure of a battery assembly of an electric toothbrush of an embodiment of the present patent specification. Fig. 5 shows a partial sectional view of an electric toothbrush of an embodiment of the present patent specification. Fig. 6 shows a partial sectional view of another portion of an electric toothbrush of an embodiment of the present specification. Fig. Figure 7 shows a partially enlarged view of Fig. 6. Fig. 8 shows a partially enlarged view of an electric toothbrush of an embodiment of the present patent specification. Fig. 9 shows a sectional view along a cross section of an electric toothbrush of an embodiment of the present patent specification. List of reference symbols

[0021] 100 Battery assembly, 200 Housing, 201 Motor. 1 battery, 11 plugs, 2 battery holders, 21 clamping jaws, guide groove 22, 3 charging coil, 4 electrical connection part, 41 socket, 42 electrical connection part contact, 5 housing, cavity 50, empty opening 51, groove 52, 6 inner bracket, 61 lock, 62 spring, 63 guide rib, 7 control board, 71 control board contacts, 8 Battery cover, 81 Battery cover seal, 82 Polygonal groove, rotary operating part 83, 9 Base cover, 91 Base cover seal. Detailed embodiments

[0022] In the following, the detailed embodiment of the present specification will be explained in more detail in conjunction with the drawings of the specification so that the purpose, features, and advantages of the present invention will be more clearly and easily understood. Besides the various embodiments described in this section, this specification may also be implemented in other ways, and those skilled in the art can make appropriate improvements, modifications, and substitutions without affecting the spirit of this specification. Therefore, this specification is not limited to the specific embodiments disclosed in this section. The scope of this specification is determined by the claims.

[0023] As in the Fig. 1 to 9, an embodiment of the present specification develops an electric toothbrush comprising a battery assembly 100, a main body 200, and a replaceable brush head, wherein the replaceable brush head can be detachably connected to the main body 200, the main body 200 is provided with a motor 201 suitable for moving the replaceable brush head, the motor 201 can be provided on the inner bracket 6 described later, and the battery assembly 100 can be provided on the main body 200 to supply power to the components of the main body 200.

[0024] In the following description, the front end is the end where the brush head of the electric toothbrush is located (see left side of the Fig. 1 to 5), and the rear end is the handy end for holding (see right side of the Fig. 1 to 5).

[0025] As in the Fig. 1 to 4, the battery assembly 100 comprises a battery 1, a battery holder 2, a charging coil 3 and an electrical connection part 4, wherein the battery 1, the charging coil 3 and the electrical connection part 4 are all connected to the battery holder 2.

[0026] Battery 1 may be cylindrical, and battery 1 may be a rechargeable battery. The positive and negative terminals of battery 1 may be electrically connected to a connector 11 via leads, and battery 1 may be discharged or charged via connector 11.

[0027] The electrical connector 4 can be mounted in front of the battery 1. The electrical connector 4 can be provided with a socket 41 and an electrical connector contact 42, and the socket 41 and the electrical connector contact 42 can be arranged on two sides of the electrical connector 4 in opposite directions. The plug 11 and the socket 41 can be detachably connected to each other, and the closing and opening of the circuit is easily achieved by plugging and unplugging. The electrical connector contacts 42 are used to establish an electrical connection by contacting the control board contacts 71 of the control board 7.

[0028] The charging coil 3 may be electrically connected to the electrical connection part 4, and a current generated by the charging coil 3 may charge the battery 1 via the electrical connection part 4. The charging coil 3 may be provided on the back of the battery 1. Since the charging coil 3 and the electrical connection part 4 are provided at both ends of the battery 1, the internal structure of the electric toothbrush can be made compact, and the charging coil 3 provided on the back of the battery 1 facilitates charging the electric toothbrush in an upright state.

[0029] The battery holder 2 may be formed with a support or frame for holding the battery 1, both the battery 1 and the electrical connection part 4 may be fixed in the battery holder 2, and the battery holder 2 may be provided with clamping jaws 21 for capturing the battery 1.

[0030] As in the Fig. 1 and Fig. 5 to 9, the main body 200 includes a housing 5, an inner bracket 6, a control plate 7, a battery cover 8, and a bottom cover 9.

[0031] The housing 5 may be cylindrical, wherein the housing 5 has a cavity 50 for receiving the battery assembly 100, the rear end of the housing 5 includes an empty opening 51 and the battery assembly 100 can be loaded into the cavity 50 from the rear end of the housing 5.

[0032] An inner bracket 6 is provided on an inner wall of the housing 5, the inner bracket 6 may be provided with a lock 61, the inner wall of the housing 5 may be provided with a groove, the inner bracket 6 is inserted into the cavity 50 from the rear end of the housing 5, and the lock 61 may be snapped into the groove.

[0033] As in the Fig. 2 and Fig. 6, the control plate 7 can be connected to the inner bracket 6, and the control plate 7 can control the movement state of the motor 201. As shown in Fig. As shown in Figure 7, the control plate 7 may be provided with control plate contacts 71. The control plate contacts 71 and the electrical connection part contacts 42 are provided opposite each other, and in the state where the battery assembly 100 is mounted in the main body 200, the control plate 7 and the electrical connection part 4 are electrically connected by contact connection. When the battery assembly 100 is replaced, the control plate 7 and the inner holder 6 do not need to be removed from the housing 5, which facilitates battery replacement.

[0034] The control plate contact 71 and / or the electrical connection part contact 42 may be elastic, and when the control plate contact 71 and the electrical connection part contact 42 are in contact, the control plate contact 71 and / or the electrical connection part contact 42 may be elastically deformed so that both elastically resist the connection and the connection remains stable.

[0035] The control plate contact 71 may be in the form of an obliquely suspended elastomer. The control plate contact 71 may have a sloped surface 711 that slopes from front to back relative to the control plate 7, with the front end of the sloped surface 711 being closer to the electrical connector contact 42 than the rear end, facilitating charging of the battery assembly 100 from the rear end of the housing 5.

[0036] As in the Fig. 5, Fig. 6 and Fig. 8, the battery cover 8 can be attached to the empty opening 51 at the rear end of the housing 5, and the battery cover 8 closes the empty opening 51 of the cavity 50. The battery cover 8 can be attached to the housing 5, for example, by means of a bottom cover 9, wherein the bottom cover 9 is cylindrical and the outer circumference and the inner circumference of the bottom cover 9 can have different shapes, wherein the outer circumference of the bottom cover 9 is ellipsoidal or polygonal and not circular, and the inner circumference of the bottom cover 9 has the shape of a square circle. The bottom cover 9 can be connected to the housing 5 by a snap connection, the inner peripheral surface of the bottom cover 9 is provided with an internal thread, the outer peripheral surface of the battery cover 8 is provided with an external thread, and the battery cover 8 can be connected to the bottom cover 9 by a threaded lock.

[0037] As in Fig. As shown in FIG. 5, a bottom cover gasket 91 may be provided between the bottom cover 9 and the housing 5, and the bottom cover gasket 91 may seal a radial gap between the bottom cover 9 and the housing 5. A battery cover gasket 81 may be provided between the battery cover 8 and the bottom cover 9, which can seal a radial gap between the battery cover 8 and the bottom cover 9. The bottom cover gasket 91 and the battery cover gasket 81 may be made of rubber. For example, both the bottom cover gasket 91 and the battery cover gasket 81 may be rubber O-rings. In the axial direction of the electric toothbrush, the bottom cover gasket 91 and the battery cover gasket 81 are located near the thread.

[0038] As in Fig. 8, a rear end surface of the battery cover 8 may be provided with a rotation operation part such as a polygonal groove 82, and a screwdriver, a coin or other tool may be used to rotate the battery cover 8 through the rotation operation part to lock or unlock the battery cover 8 and the bottom cover 9.

[0039] The battery cover 8 and the bottom cover 9 may be provided with an indicator mark, the indicator mark of the bottom cover 9 may include a lock mark and an unlock mark, and the mark of the battery cover 8 may include a graduated mark, and it can be intuitively judged whether the battery cover 8 and the bottom cover 9 are locked or unlocked by aligning the graduated indicator mark with the lock mark and the unlock mark.

[0040] As in the Fig. As shown in Figures 5 to 7, the inner holder 6 can be provided with a spring 62, wherein the spring 62 is a compression spring and is located in front of the battery assembly 100. When the battery assembly 100 is inserted into the main body 200, the front of the battery assembly 100 presses against the spring 62, thereby compressing the spring 62. During normal use of the battery assembly 100 mounted in the main body 200, the spring 62 remains compressed, so that the battery assembly 100 tends to pop out of the cavity 50, and the spring 62 allows the battery assembly 100 to remain stable in the cavity 50 and the battery assembly 100 cannot move relative to the main body 200 during use.

[0041] When the battery assembly 100 needs to be removed, the spring 62 can eject the battery assembly 100 from the main body 200 after the battery cover 8 and the bottom cover 9 are unlocked, so that it is easy to take out the battery assembly 100 and replace the battery 1.

[0042] As in Fig.As shown in Figure 9, the inner bracket 6 and the battery holder 2 include a guide structure extending along the axial direction of the electric toothbrush, and the guide structure can allow the two inner brackets 6 and the battery holder 2 to slide relative to each other along the axial direction. For example, an inner wall surface of the inner bracket 6 may be provided with a guide rib 63, and the guide rib 63 may extend along the axial direction of the inner bracket 6. The outer peripheral surface of the battery holder 2 is provided with a guide groove 22, and the guide groove 22 may extend along the axial direction of the battery holder 2. The guide rib 63 and the guide groove 22 cooperate to allow the battery holder 2 to slide along the axial direction of the electric toothbrush, and thus allow the battery assembly 100 to slide under the guide effect.

[0043] The electric toothbrush of the present patent can be charged inductively and wirelessly using a charging coil. When the battery is worn out to the point where it needs to be replaced, the electrical connection between the battery assembly and the main body established by contact allows the battery assembly and the main body to be easily separated, the battery assembly can be removed from the main body as a whole, and the battery can be replaced, thus extending the service life of the electric toothbrush.

[0044] This patent is not limited to the above-mentioned embodiments, and those skilled in the art may develop various variations of the above-mentioned embodiments of this patent within the scope of this patent without departing from the scope of this patent. Furthermore, the following notes are provided. (1) Although the rotary operating part is a polygonal groove in the above embodiment, the present specification is not limited to this, and the rotary operating part may be a groove having other shapes such as a zigzag shape or a cross shape. (2) Although the bottom cover is fixed to the housing by a snap-in connection in the above embodiment, the present patent document is not limited to this, since the outer peripheral surface of the bottom cover and the inner peripheral surface of the housing may be circular, and the bottom cover may be connected to the housing by a thread. (3) Although the battery cover is fixed to the empty opening of the cavity by a thread in the above embodiment, the present specification is not limited to this, and the battery cover may also be fixed to the empty opening of the cavity by an interference fit. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 1572260A

[0004] CN 207855308

[0005] CN 2390469Y

[0005]

Claims

[1] Electric toothbrush, characterized by that it includes: a battery assembly (100), wherein the battery assembly (100) comprises a battery (1), a battery holder (2), a charging coil (3), and an electrical connecting part (4), wherein the battery (1), the charging coil (3), and the electrical connecting part (4) are electrically connected to the battery holder (2), wherein the battery (1) is electrically connected to the electrical connecting part (4), the charging coil (3) and the electrical connecting part (4) are electrically connected to charge the battery (1) by means of an induced current generated by the charging coil (3); and a main body (200), the main body (200) comprising a housing (5), a control plate (7) and a battery cover (8), the housing (5) having a cavity (50), the control plate (7) and the battery assembly (100) being provided in the cavity (50), the battery cover (8) closing the empty opening (51) of the cavity and being electrically connected to the control plate (7) via the electrical connecting part (4) and the control plate (7) to supply power to the control plate (7). [2] Electric toothbrush according to claim 1, characterized by that the electrical connecting part (4) comprises electrical connecting part contacts (42), the control plate (7) comprises control plate contact (71) and the control plate contact (71) is in contact with the electrical connecting part contact (42), so that the control plate (7) and the electrical connecting part (4) are electrically connected by contact connection. [3] Electric toothbrush according to claim 1, characterized by that the electrical connection part (4) is provided in front of the battery (1) and the charging coil (3) is provided on the back of the battery (1), wherein the battery cover (8) is installed in the empty opening (51) by means of a thread or an interference fit. [4] Electric toothbrush according to claim 2, characterized by in that the electrical connection part (4) further comprises a socket (41), wherein the battery (1) is electrically connected to a plug (11) and the plug (11) and the socket (41) can be removed and connected. [5] Electric toothbrush according to claim 4, characterized by that the socket (41) and the electrical connection part contact (42) are provided on two sides of the electrical connection part (4) in opposite directions. [6] Electric toothbrush according to claim 1, characterized byin that the main body (200) further comprises an inner holder (6), wherein the control plate (7) is provided in the inner holder (6), wherein the inner holder (6) is provided on the inner wall of the housing (5), wherein the inner holder (6) and the battery holder (2) are provided with a guide structure extending along the axial direction of the electric toothbrush, wherein the guide structure causes both the inner holder (6) and the battery holder (2) to slide relative to each other along the axial direction. [7] Electric toothbrush according to claim 6, characterized byin that the inner holder (6) is provided with a spring (62), the spring (62) being a compression spring, the spring (62) being compressed in the state in which the battery assembly (100) is mounted in the main body (200) so that the battery assembly (100) has a tendency to be ejected from the cavity (50), the control plate contact (71) and the electrical connection part contact (42) elastically resisting. [8] Electric toothbrush according to claim 1, characterized by in that the control plate contact (71) has an inclined surface (711) inclined in the forward and backward direction with respect to the control plate (7), the front end of the inclined surface being closer to the electrical connection part contact (42) than the rear end. [9] Electric toothbrush according to claim 4, characterized byin that the main body (200) further comprises a battery cover (8) and a base cover (9), wherein the battery cover (8) is in the empty opening (51) of the housing (5) through the base cover (9), wherein the battery cover (8) is connected to the base cover (9) by a thread. [10] Electric toothbrush according to claim 9, characterized by that the battery cover (8) is provided with a rotary actuating part (83) in the form of a groove on the rear end surface.

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