An electric toothbrush with a low-voltage sonic motor

Abstract

This utility model relates to the field of electric toothbrush technology, and more particularly to an electric toothbrush with a low-voltage sonic motor that offers good cleaning performance, a slim structure, and portability. It includes a brush head and a handle. The handle houses a motor assembly, a fixing device, and a battery. The motor assembly drives the brush head, and the fixing device secures the motor assembly and battery. The motor assembly includes a low-voltage sonic motor, and the battery supplies power to the low-voltage sonic motor. The low-voltage sonic motor and the battery are arranged axially along the handle. By applying a low-voltage sonic motor to the electric toothbrush, this utility model reduces the circumferential size of the motor assembly within the handle, avoids the need for a large rechargeable battery and corresponding charging equipment, further simplifying the space occupied by the motor assembly. This results in a lightweight, slim, neat, and aesthetically pleasing handle that is easy to carry.

Description

Technical Field

[0001] This utility model relates to the field of electric toothbrush technology, and in particular to an electric toothbrush with a low-pressure sonic motor. Background Technology

[0002] Currently, electric toothbrushes using alkaline batteries typically employ a hollow cup motor as the brush head driver. While hollow cup motors are relatively inexpensive, they suffer from weak brush head vibration and high operating noise. Some existing technologies incorporate sonic motors as the brush head driver. Sonic motors offer stronger brush head vibration, higher frequency, better cleaning, and lower operating noise, but they are more expensive and bulkier, usually requiring a large rechargeable battery and corresponding charging equipment, making the electric toothbrush less lightweight. Therefore, it is necessary to develop an electric toothbrush that provides effective vibration cleaning and has a lightweight and slim design. Utility Model Content

[0003] This utility model provides an electric toothbrush with a low-voltage sonic motor that offers good cleaning performance, a slim structure, and portability. It includes a brush head and a handle. A motor assembly, a fixing device, and a battery are installed within the handle. The motor assembly drives the brush head, and the fixing device secures the motor assembly and the battery. The motor assembly includes a low-voltage sonic motor, and the battery supplies power to the low-voltage sonic motor. The low-voltage sonic motor and the battery are arranged axially along the handle.

[0004] Furthermore, the fixing device includes an upper housing and a lower housing, which together form a cavity for accommodating and fixing the low-pressure acoustic motor, and the upper housing and the lower housing are connected as one unit.

[0005] Furthermore, the motor assembly also includes a motor shaft, which is disposed on the side of the low-pressure acoustic motor near the brush head. The two ends of the motor shaft are respectively connected to the low-pressure acoustic motor and the brush head. The end of the motor shaft connected to the brush head protrudes out of the upper housing. The motor shaft is used to transmit the power generated by the low-pressure acoustic motor to the brush head.

[0006] Furthermore, the motor assembly also includes a shock-absorbing unit, which is sleeved on the circumferential outer side of the motor shaft and is axially disposed between the handle and the brush head. The shock-absorbing unit is used to reduce the noise generated during the operation of the low-pressure acoustic motor.

[0007] Furthermore, the motor assembly also includes an electrical connection device disposed below the low-voltage acoustic motor. The electrical connection device is used to accommodate and fix the battery and is electrically connected to the battery. The electrical connection device includes a positive electrode spring and a negative electrode spring. The positive electrode spring is mounted on the fixing device. A rear cover is connected to the lower part of the handle. The positive electrode spring extends axially along the handle. The negative electrode spring is mounted on the rear cover. The positive electrode spring and the negative electrode spring are respectively used to connect to two contacts of the battery. The rear cover is snapped together with the fixing device by a snap-fit ​​structure.

[0008] Furthermore, the positive electrode spring is fixed to the fixing device by a hot-melt column.

[0009] Furthermore, the fixing device also includes a connecting rib, which extends axially from the lower part of the lower housing along the handle portion, and the connecting rib is provided with a heat-fusion connection point for heat-fusion fixing with the positive electrode spring.

[0010] Furthermore, the motor assembly also includes a circuit board, which is electrically connected to the low-voltage acoustic motor, and the circuit board is fixed to the outer side of the fixing device in the circumferential direction and the inner side of the handle portion.

[0011] Furthermore, the circuit board is fixed to the fixing device by a hot-melt post.

[0012] Furthermore, the circuit board is also fixed relative to the fixing device by a barbed snap fastener protruding from the fixing device.

[0013] The electric toothbrush with a low-voltage sonic motor provided by this utility model reduces the circumferential size of the motor assembly in the handle by applying a low-voltage sonic motor to the electric toothbrush. In addition, by avoiding the placement of a large rechargeable battery and corresponding charging device in the handle, the space occupied by the motor assembly is further reduced, making the handle lightweight, slim, neat and beautiful, and easy to carry. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model.

[0015] Figure 2 This is a schematic diagram of a motor assembly and a fixing device according to an embodiment of the present invention.

[0016] Figure 3 This is an exploded view of a motor assembly according to an embodiment of the present invention.

[0017] Figure 4 This is a schematic diagram of a fixing device according to an embodiment of the present invention. Detailed Implementation

[0018] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended purpose of the invention, the present utility model will be described in detail below with reference to the accompanying drawings and preferred embodiments.

[0019] It should be noted that the terms "first," "second," "third," "fourth," etc., in the specification and claims of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0020] The directional terms used in the specification and claims of this utility model, such as "above" and "below", are based on the structure of electric toothbrushes commonly used in the art, with the brush head above and the handle below.

[0021] Please see Figures 1 to 4 The electric toothbrush with a low-voltage sonic motor provided by this utility model includes a brush head 1, a handle 2, and a rear cover 6. The brush head 1 is connected to the upper part of the handle 2, and the rear cover 6 is connected to the lower part of the handle 2. A motor assembly 3, a fixing device 4, and a battery 5 are installed in the handle 2. The motor assembly 3 is used to drive the brush head 1, and the fixing device 4 is used to fix the motor assembly 3 and the battery 5. The motor assembly 3 includes a low-voltage sonic motor 31, and the battery 5 can supply power to the low-voltage sonic motor 31. The low-voltage sonic motor 31 and the battery 5 are configured to be distributed along the axial direction of the handle 2.

[0022] Specifically, in this embodiment, the low-voltage acoustic motor 31 is configured to drive the brush head 1 with a low voltage of 1.5V, and therefore can be driven by a battery 5, more specifically by an alkaline AA battery. The electromagnet and permanent magnet of the low-voltage acoustic motor 31 are arranged along the axial direction of the handle portion 2. The low-voltage acoustic motor 31 and the battery 5 are respectively arranged at the upper and lower parts of the handle portion 2 along the axial direction of the handle portion 2.

[0023] This invention applies a low-voltage sonic motor 31 to an electric toothbrush, which reduces the circumferential size of the motor assembly 3 inside the handle 2. Furthermore, by avoiding the placement of a large rechargeable battery and corresponding charging equipment inside the handle 2, the space occupied by the motor assembly 3 and battery 5 is further simplified, making the handle 2 lightweight, slim, neat, and beautiful, and easy to carry.

[0024] In one embodiment, combined with Figure 2 and Figure 4 The fixing device 4 includes an upper housing 41 and a lower housing 42, which together form a cavity for accommodating and fixing the low-pressure acoustic motor 31. The upper housing 41 and the lower housing 42 are connected as one unit.

[0025] Specifically, in this embodiment, the upper housing 41 and the lower housing 42 are distributed along the axial direction, and the upper housing 41 and the lower housing 42 respectively wrap around the upper and lower parts of the low-pressure acoustic motor 31 to fix the low-pressure acoustic motor 31.

[0026] Specifically, in this embodiment, such as Figure 4 As shown, the fixing device 4 also includes a connecting rib 43, which extends from the lower housing 42 along the axial direction of the handle portion 2 towards the rear cover portion 6. A snap-fit ​​structure for connecting and assembling with the rear cover portion 6 is also provided below the connecting rib 43. The snap-fit ​​structure is connected to one end of the lower housing 42 near the rear cover portion 6, and... Figure 3 The snap-fit ​​structure can engage with the corresponding structure on the rear cover 6 to connect the rear cover 6 and the fixing device 4 as a whole. This utility model fixes the motor assembly 3 inside the handle part 2 through the upper housing 41 and the lower housing 42, which is simple in structure and low in cost.

[0027] In one embodiment, combined with Figure 2 and Figure 4 The motor assembly 3 also includes a motor shaft 32, an electrical connection device 34 and a circuit board 35. One end of the motor shaft 32 is connected to the side of the motor assembly 3 near the brush head 1, and the other end extends out of the upper housing 41 and is connected to the brush head 1 in a transmission manner. The motor shaft 32 is used to transmit the power generated by the low-pressure acoustic motor 31 to the brush head 1.

[0028] The shock-absorbing unit 33 is sleeved on the circumferential outer side of the motor shaft 32 and is located between the handle part 2 and the motor shaft 32. The shock-absorbing unit 33 is located between the handle part 2 and the brush head 1 along the axial direction of the motor shaft 32. The shock-absorbing unit 33 is used to reduce the noise generated during the operation of the low-pressure acoustic motor 31.

[0029] An electrical connection device 34 is disposed below the low-voltage acoustic motor 31. The electrical connection device 34 is used to accommodate and fix the battery 5 and is electrically connected to the battery 5.

[0030] The circuit board 35 is electrically connected to the low-voltage acoustic motor 31. The circuit board 35 is fixed to the outside of the upper housing 41 and the lower housing 42, and the inside of the handle part 2.

[0031] Specifically, in this embodiment, the low-voltage acoustic motor 31, the electrical connection device 34, and the circuit board 35 are electrically connected, and the circuit board 35 can control the low-voltage acoustic motor 31 to start and stop under the drive of the button on the handle 2.

[0032] Specifically, in this embodiment, the shock-absorbing unit 33 is a soft rubber shock-absorbing material that is loosely fitted on the motor shaft 32. The periphery of the shock-absorbing unit 33 abuts against the handle part 2 to absorb the noise generated when the low-pressure sonic motor 31 is working, and also avoids the "hard-to-hard" noise generated by the rigid parts of the fixing device 4 (upper housing 41 and lower housing 42) and the handle part 2.

[0033] Specifically, in this embodiment, such as Figure 3 As shown, the electrical connection device 34 includes a positive electrode spring 341 and a negative electrode spring 342. The positive electrode spring 341 is mounted on the fixing device 4 and extends axially along the handle portion 2 towards the rear cover portion 6. The negative electrode spring 342 is mounted on the rear cover portion 6. The positive electrode spring 341 and the negative electrode spring 342 are respectively connected to two contacts of the battery 5, thus connecting... Figure 4 The connecting rib 43 is provided with several hot-melt connection points 4b, and the positive electrode spring 341 is fixed to the fixing device 4 through the hot-melt column and the hot-melt connection points 4b.

[0034] Specifically, in this embodiment, such as Figure 2 As shown, the upper housing 41 is provided with a barbed buckle 4a for fixing the circuit board 35. The upper part of the circuit board 35 is fixed to the fixing device 4 by the barbed buckle 4a, and the lower part of the circuit board 35 is fixed to the lower housing 42 by a hot melt column. That is, a hot melt connection point is also provided on the area of ​​the lower housing 42 corresponding to the circuit board 35. The processing is simple and the cost is low.

[0035] In summary, the electric toothbrush with a low-voltage sonic motor of this invention reduces the circumferential size of the motor assembly 3 inside the handle 2 by applying the low-voltage sonic motor 31 to the electric toothbrush. In addition, by avoiding the placement of a large rechargeable battery and corresponding charging device inside the handle 2, the space occupied by the motor assembly 3 is further simplified, making the handle 2 lightweight, slim, neat and beautiful, and easy to carry.

[0036] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. An electric toothbrush with a low-voltage sonic motor, characterized in that: The device includes a brush head (1) and a handle (2). The handle (2) houses a motor assembly (3), a fixing device (4), and a battery (5). The motor assembly (3) drives the brush head (1), and the fixing device (4) fixes the motor assembly (3) and the battery (5). The motor assembly (3) includes a low-voltage acoustic motor (31), and the battery (5) supplies power to the low-voltage acoustic motor (31). The low-voltage acoustic motor (31) and the battery (5) are arranged along the axial direction of the handle (2).

2. The electric toothbrush with a low-voltage sonic motor as described in claim 1, characterized in that: The fixing device (4) includes an upper housing (41) and a lower housing (42). The upper housing (41) and the lower housing (42) together form a cavity for accommodating and fixing the low-pressure acoustic motor (31). The upper housing (41) and the lower housing (42) are connected as one unit.

3. The electric toothbrush with a low-voltage sonic motor as described in claim 2, characterized in that: The motor assembly (3) also includes a motor shaft (32), which is located on the side of the low-pressure acoustic motor (31) near the brush head (1). The two ends of the motor shaft (32) are respectively connected to the low-pressure acoustic motor (31) and the brush head (1). The end of the motor shaft (32) connected to the brush head (1) protrudes out of the upper housing (41). The motor shaft (32) is used to transmit the power generated by the low-pressure acoustic motor (31) to the brush head (1).

4. The electric toothbrush with a low-voltage sonic motor as described in claim 3, characterized in that: The motor assembly (3) also includes a shock-absorbing unit (33), which is sleeved on the circumferential outer side of the motor shaft (32). The shock-absorbing unit (33) is axially disposed between the handle part (2) and the brush head (1). The shock-absorbing unit (33) is used to reduce the noise generated during the operation of the low-pressure acoustic motor (31).

5. The electric toothbrush with a low-voltage sonic motor as described in claim 2, characterized in that: The motor assembly (3) further includes an electrical connection device (34), which is located below the low-voltage acoustic motor (31). The electrical connection device (34) is used to accommodate and fix the battery (5) and is electrically connected to the battery (5). The electrical connection device (34) includes a positive electrode spring (341) and a negative electrode spring (342). The positive electrode spring (341) is mounted on the fixing device (4). A rear cover (6) is connected below the handle part (2). The positive electrode spring (341) extends along the axial direction of the handle part (2). The negative electrode spring (342) is mounted on the rear cover (6). The positive electrode spring (341) and the negative electrode spring (342) are respectively connected to two contacts of the battery (5).

6. The electric toothbrush with a low-voltage sonic motor as described in claim 5, characterized in that: The positive electrode spring (341) is fixed to the fixing device (4) by a hot melt column.

7. The electric toothbrush with a low-voltage sonic motor as described in claim 6, characterized in that: The fixing device (4) also includes a connecting rib (43), which extends axially from the lower housing (42) along the handle portion (2). The connecting rib (43) is provided with a hot-melt connection point (4b) for cooperating with the hot-melt column of the positive electrode spring (341).

8. The electric toothbrush with a low-voltage sonic motor as described in claim 1, characterized in that: The motor assembly (3) also includes a circuit board (35), which is electrically connected to the low-pressure acoustic motor (31). The circuit board (35) is fixed to the outer side of the fixing device (4) in the circumferential direction and the inner side of the handle (2).

9. The electric toothbrush with a low-voltage sonic motor as described in claim 8, characterized in that: The circuit board (35) is fixed to the fixing device (4) by a hot melt column.

10. The electric toothbrush with a low-voltage sonic motor as described in claim 8, characterized in that: The circuit board (35) is also fixed relative to the fixing device (4) by a barb buckle (4a) protruding from the fixing device (4).

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