Force sensing structure applied to electric toothbrush

Abstract

The utility model discloses a force sensing structure applied to an electric toothbrush, and belongs to the technical field of force sensing. Comprising a main control PCB, a force sensor, a deformation piece, a first fixing part and a second fixing part, the force sensor is attached to the surface of the deformation piece, and the force sensor is electrically connected with the main control PCB; one end of the deformation piece is fixedly connected with the first fixing part, the other end of the deformation piece is fixedly connected with the second fixing part, and a deformation gap is further formed in the side, away from the force sensor, of the deformation piece. Compared with the prior art, the force sensor of the force sensing structure does not need to be arranged on a toothbrush rod of the electric toothbrush, the technology is better achieved, and the force sensing structure can be suitable for the electric toothbrush rotating by 360 degrees; meanwhile, the force sensor is installed through the deformation sheet with the deformation gap, micro deformation is triggered more easily, and the sensitivity of the force sensor can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of force sensing, and particularly relates to a force sensing structure applied to an electric toothbrush. Background Art

[0002] Electric toothbrushes mainly use the rapid rotation or vibration of the electric motor to make the brush head vibrate at high frequencies, instantly breaking down the toothpaste into fine foam and deeply cleaning the gaps between teeth. Electric toothbrushes are usually equipped with sensors to detect the force of the toothbrush head on the teeth. When the user presses the toothbrush head against the teeth and prepares to start brushing, the brush head will be subject to the reaction force of the teeth. The main control unit controls the start or stop of the electric toothbrush based on the real-time pressure value collected by the pressure sensor, thereby realizing the control of the start and stop of the electric toothbrush without the need for physical buttons.

[0003] The sensor of an existing electric toothbrush is usually installed on the toothbrush rod (motor output shaft), which is connected to the output end of the motor, and the sensor is installed by making a groove on the toothbrush rod. Since the toothbrush rod is usually thin, it is difficult to install the sensor in the middle of the groove. In addition, for an electric toothbrush whose toothbrush head needs to rotate 360 ​​degrees, it is impossible to install the sensor on the toothbrush rod. Utility Model Content

[0004] In order to solve the above problems, the purpose of the utility model is to provide a force sensing structure applied to an electric toothbrush, which has strong adaptability and reduces the process difficulty.

[0005] Another object of the utility model is to provide a force sensing structure for an electric toothbrush, which is easier to trigger and has high sensitivity.

[0006] To achieve the above purpose, the technical solution of the utility model is as follows:

[0007] The utility model provides a force sensing structure applied to an electric toothbrush, comprising: a main control PCB board, a force sensor, a deformation piece, a first fixing part, and a second fixing part, wherein the force sensor is in contact with the surface of the deformation piece, and the force sensor is electrically connected to the main control PCB board; one end of the deformation piece is fixedly connected to the first fixing part, and the other end is fixedly connected to the second fixing part, and a deformation gap is further provided on the side of the deformation piece away from the force sensor.

[0008] Furthermore, the force sensing structure also includes a motor and a fixed bracket, the first fixed portion is arranged on the outer surface of the motor, the second fixed portion is arranged on the fixed bracket, the deformable sheet is arranged at an angle, and the deformation gap is formed between the deformable sheet and the motor.

[0009] Compared with the prior art, the force sensor of the present force sensing structure does not need to be provided with a groove on the toothbrush rod of the electric toothbrush, which is easier to implement in terms of technology and can be applied to an electric toothbrush that rotates 360 degrees. At the same time, by arranging a deformation sheet with a deformation gap to install the force sensor, it is easier to trigger micro-deformation and improve the sensitivity of the force sensor. Brief Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the force sensing structure. Detailed Description of the Embodiment

[0011] In order to make the objectives, technical solutions and advantages of the present utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0012] To achieve the above objective, the technical solution of the present utility model is as follows:

[0013] Refer to Figure 1 As shown, the present embodiment provides a force sensing structure applied to an electric toothbrush, including: a main control PCB board (not shown in the figure), a force sensor 1, a deformation sheet 2, a first fixing part 3, and a second fixing part 4. The force sensor 1 is attached to the surface of the deformation sheet 2, and the force sensor 1 is electrically connected to the main control PCB board. One end of the deformation sheet 2 is fixedly connected to the first fixing part 3, and the other end is fixedly connected to the second fixing part 4. A deformation gap 7 is further provided on the side of the deformation sheet 2 facing away from the force sensor 1.

[0014] Further, the force sensing structure further includes a motor 5 and a fixing bracket 6. The first fixing part 3 is disposed on the outer surface of the motor 5, and the second fixing part 4 is disposed on the fixing bracket 6. The deformation sheet 2 is inclined, and the deformation gap 7 is formed between the deformation sheet 2 and the motor 5. In this embodiment, a fixing bracket 6 can be provided on the inner side of the outer housing 8 or the outer side of the inner housing 9 of the electric toothbrush to fix the deformation sheet 2, or the main control PCB board outside the inner housing 9 can be used as the fixing bracket 6 to fix the deformation sheet 2.

[0015] When the user uses the electric toothbrush, a force is applied from above or below the toothbrush rod 10. According to the principle of leverage, the motor has a tendency to slightly tilt. The force is transmitted to the deformation sheet 2 through the motor 5, and the deformation sheet 2 will undergo micro-deformation. The force sensor 1 detects the force applied by the user by sensing the micro-deformation of the deformation sheet 2 and controls the start and stop of the electric toothbrush. The formation of the deformation gap 7 between the deformation sheet 2 and the motor 5 can provide a deformation space for the deformation sheet 2, making it easier for the deformation sheet 2 to trigger deformation and improving the sensitivity of the force sensor 1.

[0016] The above are only the preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A force sensing structure for an electric toothbrush, characterized in that: include: A main control PCB board, a force sensor, a deformation piece, a first fixing part, and a second fixing part, wherein the force sensor is in contact with the surface of the deformation piece, and the force sensor is electrically connected to the main control PCB board; one end of the deformation piece is fixedly connected to the first fixing part, and the other end is fixedly connected to the second fixing part, and a deformation gap is also provided on the side of the deformation piece away from the force sensor.

2. A force sensing structure for an electric toothbrush as claimed in claim 1, characterized in that: The force sensing structure also includes a motor and a fixing bracket. The first fixing portion is arranged on the outer surface of the motor, and the second fixing portion is arranged on the fixing bracket. The deformable sheet is arranged at an angle, and the deformation gap is formed between the deformable sheet and the motor.

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