Direct-current driving motor and electric toothbrush

Abstract

The utility model discloses a direct-current driving motor and an electric toothbrush, and relates to the technical field of driving devices, the direct-current driving motor comprises a shell, a coil assembly, a rotating structure and an induction component, the shell is of an upper side and / or lower side opening structure, a containing cavity is formed in the shell, a winding frame is arranged in the containing cavity, and the two ends of the winding frame are connected with the two sides of the shell respectively; a through hole is formed in one end of the shell, and a slot is formed in the other end of the shell; the coil group is wound on the reel; the rotating structure is rotatably inserted into the shell from the through hole, a magnetic assembly is arranged on the surface, located in the containing cavity, of the rotating structure, an elastic tail connecting piece is arranged at the end, located in the containing cavity, of the rotating structure, and the rotating structure is inserted into the inserting groove through the tail connecting piece; the sensing part is arranged on the tail connecting piece and used for sensing the pressure condition of the end, located outside the shell, of the rotating structure. According to the invention, the pressure condition of the rotating structure can be detected, so that the use flexibility is improved.

Description

Technical Field

[0001] The present application relates to the technical field of drive devices, and in particular to a direct current sonic motor and an electric toothbrush. Background Art

[0002] As a common form of DC drive motor, the vibration motor realizes the vibration function through the alternating forward and reverse motion of the drive shaft. In the current electric toothbrush market, vibrating toothbrushes occupy a place. Their working principle is mainly to drive the brush head to vibrate through the vibration motor, so as to achieve the effect of cleaning teeth and oral cavity. However, if the user applies too much force when using the electric toothbrush and the vibration motor continues to work, this may cause potential damage to the user's teeth.

[0003] Unfortunately, most DC sonic motors are not equipped with pressure detection. In order to prevent potential damage to teeth caused by excessive pressure, manufacturers need to install additional pressure sensors in the internal space of the electric toothbrush. The working principle of this pressure sensor is to achieve pressure sensing by squeezing the drive shaft outside the DC sonic motor. However, this external pressure sensor method not only takes up internal space, but also may cause damage to the pressure sensor when the drive shaft is subjected to excessive pressure. Utility Model Content

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a DC drive motor and an electric toothbrush, which can detect the pressure condition of the rotating structure by itself, thereby improving the flexibility of use.

[0005] In a first aspect, the present application provides a DC drive motor, comprising:

[0006] A shell, wherein the shell is an upper and / or lower opening structure and is provided with a receiving cavity inside, wherein a winding frame is provided in the receiving cavity, wherein two ends of the winding frame are respectively connected to two sides of the shell and are arranged close to one of the opening structures, wherein one end of the shell is provided with a through hole, and the other end is provided with a slot;

[0007] A coil group, wherein the coil group is wound on the winding frame;

[0008] A rotating structure, the rotating structure is rotatably inserted into the shell through the through hole, a magnetic component is provided on the surface of the rotating structure located in the accommodating cavity, an elastic tail connector is provided at one end of the rotating structure located in the accommodating cavity, and the rotating structure is inserted into the slot through the tail connector;

[0009] A sensing component is disposed on the tail connector and is used to sense the pressure condition of one end of the rotating structure located outside the shell.

[0010] According to the DC drive motor of the first aspect of the present application, at least the following beneficial effects are achieved: the DC drive motor provided by the present application provides a positive and negative alternating voltage to the coil group at a higher frequency through an external drive module, so that the coil group generates a magnetic field, and the magnetic component on the rotating structure generates a torque under the action of the magnetic field generated by the coil group, so that the rotating structure rotates forward and reverse at a high frequency to achieve the purpose of vibration. The induction component is arranged on the tail connector, and when the end of the rotating structure outside the shell is subjected to external pressure, the through hole of the shell is used as a fulcrum to transmit the force to the elastic tail connector located inside, and the tail connector will have a tendency to deform slightly, thereby generating stress, and the induction component located on the tail connector detects the stress to obtain the pressure condition of the end of the rotating structure outside the shell. The present application also has a winding frame in the shell, which provides a fixed winding position for the coil group, keeps it neat and orderly, and also ensures that a certain distance is maintained between the coil group and the magnetic component. In addition, the shell is an upper and lower opening structure, which saves consumables and reduces the overall production cost without affecting the normal use of the motor, making the motor lighter as a whole. Finally, the present application arranges the sensing component inside the accommodating cavity and on the tail connector connected to the rotating structure. There is no need to add additional sensing components on the outside to sense the pressure condition of the end of the rotating structure outside the shell, thereby reducing the space occupied by additional external sensing components. The DC drive motor itself can sense the force on the drive shaft, thereby improving the convenience of using the DC drive motor and enabling it to be more flexibly applied to different application scenarios.

[0011] According to some embodiments of the first aspect of the present application, a bearing is provided in the through hole, and the rotating structure passes through the bearing and is rotatably inserted in the shell.

[0012] According to some embodiments of the first aspect of the present application, the rotating structure includes a drive shaft and a colloid, the colloid is located in the accommodating cavity, the drive shaft passes through the bearing and is connected to one end of the colloid, the tail connector is arranged at the other end of the colloid, and the magnetic component is arranged on the colloid.

[0013] According to some embodiments of the first aspect of the present application, the magnetic assembly includes a first permanent magnet and a second permanent magnet, the first permanent magnet is arranged on a side of the colloid close to the coil group, and the second permanent magnet is arranged on a side of the colloid opposite to the first permanent magnet, and the magnetic poles of the opposing surfaces of the first permanent magnet and the second permanent magnet are opposite.

[0014] According to some embodiments of the first aspect of the present application, a flat portion is provided at one end of the drive shaft away from the colloid, and the flat portion is used to prevent external connection from being fooled.

[0015] According to some embodiments of the first aspect of the present application, a protrusion is extended outwardly from the other end of the shell, and the slot is arranged at the protrusion.

[0016] According to some embodiments of the first aspect of the present application, the tail connector is flat, and the shape of the slot matches the tail connector.

[0017] According to some embodiments of the first aspect of the present application, the sensing component is a pressure sensor.

[0018] In a second aspect, the present application also provides an electric toothbrush, comprising a DC drive motor as described in any embodiment of the first aspect.

[0019] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0021] Figure 1 A schematic diagram of the structure of a DC drive motor provided in some embodiments of the first aspect of the present application;

[0022] Figure 2 An internal schematic diagram of a DC drive motor provided in some embodiments of the first aspect of the present application;

[0023] Figure 3 A schematic diagram of the structure of a housing provided in some embodiments of the first aspect of the present application;

[0024] Figure 4 A schematic structural diagram of a rotating structure provided for some embodiments of the first aspect of the present application.

[0025] The figures are as follows:

[0026] Shell 100; accommodating cavity 110; winding frame 120; through hole 130; slot 140; protrusion 150; bearing 160; coil assembly 200; drive shaft 300; flat portion 301; colloid 310; tail connector 320; first permanent magnet 330; second permanent magnet 340; induction component 400. DETAILED DESCRIPTION

[0027] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0028] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0029] In the description of this application, if there is a description of first or second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0030] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0031] Vibration motors, as a common form of DC drive motors, achieve vibration function through the alternating forward and reverse motion of the drive shaft. In the current electric toothbrush market, vibrating toothbrushes occupy a place. Their working principle is mainly to drive the brush head to vibrate through a vibration motor, so as to achieve the effect of cleaning teeth and oral cavity. However, if the user applies too much force when using the electric toothbrush and the vibration motor continues to work, this may cause potential damage to the user's teeth. Unfortunately, most DC sonic motors are not equipped with pressure detection function. In order to prevent potential damage to teeth caused by excessive pressure, manufacturers need to install additional pressure sensors in the internal space of the electric toothbrush. The working principle of this pressure sensor is to achieve pressure sensing by squeezing it through the drive shaft outside the DC sonic motor. However, this external pressure sensor method not only takes up internal space, but also may cause damage to the pressure sensor when the drive shaft is subjected to excessive pressure.

[0032] Based on this, the present application provides a DC drive motor and an electric toothbrush to solve the above-mentioned technical problems. The technical solutions provided by the present application are described in detail one by one below.

[0033] First, refer to Figures 1 to 3The present application provides a DC drive motor, comprising: a shell 100, a coil group 200, a rotating structure and an induction component 400. The shell 100 is an upper and / or lower opening structure and is provided with a receiving chamber 110 inside. A winding frame 120 is provided in the receiving chamber 110. The two ends of the winding frame 120 are respectively connected to the two sides of the shell 100 and are arranged near one of the opening structures. A through hole 130 is provided at one end of the shell 100, and a slot 140 is provided at the other end. The coil group 200 is wound on the winding frame 120. The rotating structure can be rotatably inserted into the shell 100 through the through hole 130. The rotating structure is provided with a magnetic component on the surface of the rotating structure located in the receiving chamber 110. An elastic tail connector 320 is provided at one end of the rotating structure located in the receiving chamber 110. The rotating structure is inserted into the slot 140 through the tail connector 320. The induction component 400 is arranged on the tail connector 320 to sense the pressure condition of the end of the rotating structure located outside the shell 100. It should be noted that the tail connector 320 has a certain deformation ability so that the rotating structure can rotate alternately in a small amplitude in the forward and reverse directions to produce a vibration effect. The tail connector 320 can be a spring. In addition, in the embodiment provided in the present application, the upper and lower sides of the shell 100 are both open structures.

[0034] The DC drive motor provided by the present application provides the coil group 200 with a positive and negative alternating voltage at a higher frequency through an external drive module, so that the coil group 200 generates a magnetic field, and the magnetic component on the rotating structure generates a torque under the action of the magnetic field generated by the coil group 200, so that the rotating structure rotates forward and reverse at a high frequency to achieve the purpose of vibration. The induction component 400 is arranged on the tail connector 320. When the end of the rotating structure outside the shell 100 is subjected to external pressure, the through hole 130 of the shell 100 is used as a fulcrum to transmit the force to the elastic tail connector 320 located inside. The tail connector 320 will have a tendency to deform slightly, thereby generating stress. The induction component 400 located on the tail connector 320 detects the stress to obtain the pressure condition of the end of the rotating structure outside the shell 100. The present application also has a winding frame 120 in the shell 100, which provides a fixed winding position for the coil group 200, keeps it neat and orderly, and also ensures that a certain distance is maintained between the coil group 200 and the magnetic component. In addition, the housing 100 is an open structure on the upper and lower sides, which saves consumables and reduces the overall production cost without affecting the normal use of the motor, making the motor lighter as a whole. Finally, the present application sets the sensing component 400 inside the accommodating cavity 110 and on the tail connector 320 connected to the rotating structure. There is no need to add an additional sensing component 400 to the outside to sense the pressure at one end of the rotating structure outside the housing 100, which reduces the position occupied by the additional sensing component 400. The DC drive motor itself can sense the force on the drive shaft 300, which improves the convenience of using the DC drive motor and enables it to be more flexibly applied to different application scenarios.

[0035] Reference Figure 2 and Figure 4 It can be understood that a bearing 160 is provided in the through hole 130, and the rotating structure passes through the bearing 160 and can be rotatably inserted in the housing 100. The driving shaft 300 passes through the bearing 160 to improve the rotation effect of the rotating structure. A protrusion can be provided at one end of the housing 100, and the through hole 130 is provided on the protrusion. The protrusion can be used to position the bearing 160, thereby improving the stability of the rotating structure during operation.

[0036] Reference Figure 2 and Figure 4The rotating structure includes a driving shaft 300 and a colloid 310. The colloid 310 is located in the accommodating chamber 110. The driving shaft 300 passes through the bearing 160 and is connected to one end of the colloid 310. The tail connector 320 is arranged at the other end of the colloid 310, and the magnetic component is arranged on the colloid 310. Specifically, the driving shaft 300 is connected to the colloid 310 after passing through the bearing 160. The cross section of the driving shaft 300 is circular, and the cross section of the colloid 310 is square, which is conducive to better installation of the magnetic component on the surface of the colloid 310. When the front end of the driving shaft 300 is subjected to a positive load force, the bearing 160 acts as a fulcrum to transmit the force to the tail connector 320, causing the tail connector 320 to move upward. Since the rear end of the tail connector 320 is fixed, a reverse force is generated to balance the positive load force. The above reverse force is sensed by the sensing component 400 to convert the force condition of the front end of the driving shaft 300.

[0037] Reference Figure 1 , Figure 2 and Figure 4 It can be understood that the magnetic assembly includes a first permanent magnet 330 and a second permanent magnet 340. The first permanent magnet 330 is arranged on the side of the colloid 310 close to the coil assembly 200, and the second permanent magnet 340 is arranged on the side of the colloid 310 opposite to the first permanent magnet 330. The magnetic poles of the opposing surfaces of the first permanent magnet 330 and the second permanent magnet 340 are opposite. During operation, a high-frequency positive and negative alternating voltage is input to the coil assembly 200. During the positive and negative alternating voltage process, the direction of the magnetic field generated by the coil assembly 200 will also change rapidly in the positive and negative directions, thereby providing forces in different directions to the first permanent magnet 330 and the second permanent magnet 340, so as to achieve the purpose of vibration through high-speed positive and negative rotation.

[0038] Reference Figure 1 , Figure 2 and Figure 4 It can be understood that the end of the driving shaft 300 away from the colloid 310 is provided with a flat portion 301, and the flat portion 301 is used to prevent the external connection. The flat portion 301 is provided at the end of the driving shaft 300 away from the colloid 310, so that the external connection piece and the driving shaft 300 can be accurately connected, thereby improving the user experience, wherein the external connection piece can be a brush head of an electric toothbrush.

[0039] Reference Figures 1 to 3 It can be understood that the other end of the housing 100 is provided with a protrusion 150 extending outward, and the slot 140 is arranged at the protrusion 150. The protrusion 150 provides sufficient depth for the slot 140 so that the tail connector 320 can be deeply inserted into the slot 140, so as to prevent the tail connector 320 from falling off from the slot 140 during operation, causing the rotating structure to fall and cause abnormal operation.

[0040] Reference Figure 2 and Figure 4 It can be understood that the tail connector 320 is flat, and the shape of the slot 140 matches the tail connector 320. The slot 140 can better limit the rotation range of the tail connector 320. Since the tail connector 320 has a certain elasticity and a certain deformation ability, the drive shaft 300 can only achieve positive and negative rotation at a small angle, and the high-frequency positive and negative rotation allows the drive shaft 300 to achieve the purpose of vibration.

[0041] It is understandable that the sensing component 400 is a pressure sensor. The pressure sensor detects the stress generated by the slight deformation of the tail connector 320. It should be noted that the main force of the vibration generated by the drive shaft 300 connected to the mover assembly is torsion. The pressure sensor in this application is more sensitive to axial force, so the vibration generated by the drive shaft 300 itself causes less interference to the pressure sensor.

[0042] In a second aspect, the present application further provides an electric toothbrush, comprising a DC drive motor as in any one of the embodiments of the first aspect. The electric toothbrush provided in the second aspect is based on the technical solution of the DC drive motor, and the technical effect produced is the same as that of the DC drive motor, and no further description will be wasted here.

[0043] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present application.

Claims

1. A DC drive motor, characterized in that: include: A shell, wherein the shell is an upper and / or lower opening structure and is provided with a receiving cavity inside, wherein a winding frame is provided in the receiving cavity, wherein two ends of the winding frame are respectively connected to two sides of the shell and are arranged close to one of the opening structures, wherein one end of the shell is provided with a through hole, and the other end is provided with a slot; A coil group, wherein the coil group is wound on the winding frame; A rotating structure, the rotating structure is rotatably inserted into the shell through the through hole, a magnetic component is provided on the surface of the rotating structure located in the accommodating cavity, an elastic tail connector is provided at one end of the rotating structure located in the accommodating cavity, and the rotating structure is inserted into the slot through the tail connector; A sensing component is disposed on the tail connector and is used to sense the pressure condition of one end of the rotating structure located outside the shell.

2. The DC drive motor according to claim 1, characterized in that: A bearing is arranged in the through hole, and the rotating structure passes through the bearing and is rotatably inserted in the shell.

3. The DC drive motor according to claim 2, characterized in that: The rotating structure includes a driving shaft and a colloid, the colloid is located in the accommodating cavity, the driving shaft passes through the bearing and is connected to one end of the colloid, the tail connector is arranged at the other end of the colloid, and the magnetic component is arranged on the colloid.

4. The DC drive motor according to claim 3, characterized in that: The magnetic assembly includes a first permanent magnet and a second permanent magnet. The first permanent magnet is arranged on a side of the colloid close to the coil group, and the second permanent magnet is arranged on a side of the colloid opposite to the first permanent magnet. The magnetic poles of the opposing surfaces of the first permanent magnet and the second permanent magnet are opposite.

5. The DC drive motor according to claim 3, characterized in that: A flat portion is provided at one end of the driving shaft away from the colloid, and the flat portion is used to prevent external connection from being fooled.

6. The DC drive motor according to claim 1, characterized in that: The other end of the shell is extended outwardly to be provided with a protrusion, and the slot is arranged at the protrusion.

7. The DC drive motor according to claim 6, characterized in that: The tail connector is flat, and the shape of the slot matches that of the tail connector.

8. The DC drive motor according to claim 1, characterized in that: The sensing component is a pressure sensor.

9. An electric toothbrush, characterized in that: It comprises a DC drive motor as described in any one of claims 1 to 8.

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