Reciprocating type swing motor with stroke detection function and hair trimmer

Abstract

The utility model relates to the technical field of swing motors, and discloses a reciprocating type swing motor with stroke detection and a hair trimmer, the reciprocating type swing motor with stroke detection comprises a body, the body is provided with a swing frame which swings back and forth, the swing frame has a first limit position and a second limit position in the swing process, the swing frame changes the swing direction between the first limit position and the second limit position, a detection mechanism used for detecting the swing stroke of the swing frame is arranged on the body and comprises a first sensor and a second sensor, the first sensor is used for detecting whether the swing frame is located at the first limit position or not, and the second sensor is used for detecting whether the swing frame is located at the second limit position. The second sensor is used for detecting whether the swing frame is located at a second limit position. The reciprocating type swing motor with the stroke detection function is simple in structure and low in production cost; the detection mechanism is arranged, the swing stroke of the swing frame can be detected, the swing frame is controlled to swing in place through the control chip, and then it is guaranteed that the blade on the swing frame has enough shearing force.

Description

Technical Field

[0001] This utility model relates to the field of swing motor technology, and more specifically, to a reciprocating swing motor with stroke detection. Background Technology

[0002] In hair trimmers such as shavers and electric clippers, the blades need to perform high-frequency reciprocating motion, a process that requires a motor and transmission structure. In existing technology, the commonly used transmission structure typically involves a motor driving an eccentric wheel to rotate at high speed. This eccentric wheel is connected to the end of the blade holder, thus achieving the high-frequency reciprocating motion of the blades. To solve the aforementioned technical problems, manufacturers have designed brushless magnetic levitation motors. When energized, this type of motor generates a magnetic field through a coil assembly. The direction of the magnetic field is continuously changed by the motor's commutation, which in turn drives a self-aligning oscillating frame. The oscillating frame, through a drive rod, moves the blades. The oscillating frame contains magnets, and the magnetic field alternates between positive and negative directions. When subjected to a positive magnetic field, the oscillating frame oscillates in one direction. When the positive magnetic field ends and the magnetic field reverses, the oscillating frame immediately returns to center and continues oscillating in the opposite direction. When the magnetic field switches back to positive, the oscillating frame oscillates in the first direction again, continuously repeating this cycle to complete the operation.

[0003] Some existing reciprocating oscillating motors have blades connected to their drive rods that have manufacturing errors, resulting in differences in the weight of the blades produced. When the drive rod drives a heavier blade (compared to a normal-weight blade) to oscillate, the oscillation resistance increases, which can easily lead to a smaller oscillation amplitude and insufficient blade shearing force, thus causing poor shaving performance in these hair trimmer products. Utility Model Content

[0004] To address at least one of the aforementioned problems, this utility model provides a reciprocating oscillating motor with stroke detection, comprising: a main body, on which a reciprocating oscillating frame is mounted, the oscillating frame having a first limit position and a second limit position during oscillation, the oscillating frame changing its oscillation direction at the first limit position and the second limit position; the main body is provided with a detection mechanism for detecting the oscillation stroke of the oscillating frame, the detection mechanism including a first sensor and a second sensor, the first sensor detecting whether the oscillating frame is at the first limit position, and the second sensor detecting whether the oscillating frame is at the second limit position; the main body is connected to a useful... The control chip controls the swing frame to change its swing direction. Both the first and second sensors are electrically connected to the control chip. When the first sensor detects that the swing frame has swung to the first limit position, the control chip controls the swing frame to change its swing direction. When the second sensor detects that the swing frame has swung to the second limit position, the control chip controls the swing frame to change its swing direction. This utility model features a reciprocating swing motor with stroke detection, which has a simple structure and low production cost. It is equipped with a detection mechanism that can detect the swing stroke of the swing frame and control the swing frame to swing into position via the control chip, thereby ensuring that the blades on the swing frame have sufficient shearing force.

[0005] Optionally, both the first sensor and the second sensor are photoelectric sensors.

[0006] Optionally, both the first sensor and the second sensor are reflective photoelectric sensors. The swing frame is provided with a reflective part. When the swing frame swings to the first limit position, the swing frame moves the reflective part to the detection area of ​​the first sensor, so that the reflective part is detected by the first sensor. When the swing frame swings to the second limit position, the swing frame moves the reflective part to the detection area of ​​the second sensor, so that the reflective part is detected by the second sensor.

[0007] Optionally, the first sensor and the second sensor are disposed on the same side of the reflective part, and the reflective part is a first smooth reflective plane.

[0008] Optionally, a first circuit board is provided on one side of the body, and both the first sensor and the second sensor are electrically connected to the first circuit board.

[0009] Optionally, the first circuit board is connected to the body by bolts.

[0010] Optionally, the first sensor and the second sensor are respectively placed on both sides of the swing frame, and the reflective part includes a second smooth reflective plane and a third smooth reflective plane, which are respectively disposed on both sides of the swing frame; when the swing frame swings to the first limit position, the swing frame drives the second smooth reflective plane to the detection area of ​​the first sensor, so that the second smooth reflective plane is detected by the first sensor; when the swing frame swings to the second limit position, the swing frame drives the third smooth reflective plane to the detection area of ​​the second sensor, so that the third smooth reflective plane is detected by the second sensor.

[0011] Optionally, the swing frame is provided with a protrusion, and the second smooth reflective plane and the third smooth reflective plane are respectively provided on the two side end faces of the protrusion.

[0012] Optionally, the main body is provided with a second circuit board and a third circuit board, which are respectively placed on both sides of the protrusion. The first sensor is electrically connected to the side of the second circuit board near the second smooth reflective surface, and the second sensor is electrically connected to the side of the third circuit board near the third smooth reflective surface.

[0013] Compared with existing technologies, the reciprocating swing motor with stroke detection in this utility model has a simple structure and low production cost; it is equipped with a detection mechanism that can detect the swing stroke of the swing frame and control the swing frame to swing into position through a control chip, thereby ensuring that the blades on the swing frame have sufficient shearing force; the swing stroke of the swing frame is detected by a photoelectric sensor, which is a non-contact detection method, avoiding contact with the swing frame and thus avoiding weakening of the swing force; the sensor selection is reasonable; the reflective part is formed on the swing frame, eliminating the need for other components, resulting in a simple structure and low production cost.

[0014] This utility model also provides a hair trimmer, including the above-mentioned reciprocating oscillating motor with stroke detection. This hair trimmer also has the beneficial effects of the above-mentioned reciprocating oscillating motor with stroke detection, which will not be described in detail here. Attached Figure Description

[0015] Figure 1 This is a perspective view of Embodiment 1 of the present utility model;

[0016] Figure 2 This is a schematic diagram of the reflective part in Embodiment 1 of the present invention;

[0017] Figure 3 This is a schematic diagram of the structure of the first circuit board in Embodiment 1 of this utility model;

[0018] Figure 4This is a circuit diagram of the motor commutation circuit according to Embodiment 1 of this utility model;

[0019] Figure 5 The circuit diagram shows the power supply circuit for the first and second sensors in Embodiment 1 of this utility model.

[0020] Figure 6 This is a pin diagram of the control chip in Embodiment 1 of this utility model;

[0021] Figure 7 This is a perspective view of Embodiment 2 of the present invention;

[0022] Figure 8 This is a schematic diagram of the structure of the third smooth reflective plane in Embodiment 2 of this utility model;

[0023] Figure 9 This is a schematic diagram of the structure of the second circuit board in Embodiment 2 of this utility model;

[0024] The component names corresponding to the various reference numerals in the figure are as follows: 1 is the main body, 101 is the positioning protrusion, 2 is the swing frame, 21 is the protrusion, 3 is the first sensor, 4 is the second sensor, 5 is the reflective part, 51 is the second smooth reflective surface, 52 is the third smooth reflective surface, 6 is the first circuit board, 61 is the bolt hole, 71 is the second circuit board, 711 is the positioning hole, and 72 is the third circuit board. Detailed Implementation

[0025] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0026] In the description of this utility model, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship when the product is in normal use.

[0027] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

[0028] Example 1:

[0029] See Figures 1-6 The first embodiment of this utility model provides a reciprocating swing motor with stroke detection, including: a body 1, a swing frame 2 for reciprocating swing on the body 1, and the swing frame 2 having a first limit position and a second limit position during the swing process; Figure 1 and Figure 2In the middle, the first limit position is the left swing limit position, and the second limit position is the right swing limit position; the swing frame 2 changes the swing direction at the first limit position and the second limit position. The main body 1 is provided with a detection mechanism for detecting the swing stroke of the swing frame 2. The detection mechanism includes a first sensor 3 and a second sensor 4. The first sensor 3 is used to detect whether the swing frame 2 is at the first limit position, and the second sensor 4 is used to detect whether the swing frame 2 is at the second limit position. The main body 1 is connected to a control chip for controlling the swing frame 2 to change the swing direction. The control chip can be set on the main body or on an external product part. The control chip is electrically connected to the control circuit (commutation circuit) of this swing motor; the first Both sensor 3 and sensor 4 are electrically connected to the control chip; the electrical connection can be wired or wireless, and the control chip is a microcontroller or other chip capable of being programmed; when the first sensor 3 detects that the swing frame 2 swings to the first limit position, the control chip controls the swing frame 2 to change its swing direction; when the second sensor 4 detects that the swing frame 2 swings to the second limit position, the control chip controls the swing frame 2 to change its swing direction; this utility model is a reciprocating swing motor with stroke detection, which has a simple structure and low production cost; it is equipped with a detection mechanism that can detect the swing stroke of the swing frame and control the swing frame to swing into place through the control chip, thereby ensuring that the blades on the swing frame have sufficient shearing force.

[0030] Specifically, when the load on the swing frame 2, such as the blades, is heavy, the swing amplitude of the swing frame 2 will decrease. At this time, the first sensor 3 and the second sensor 4 cannot detect that the swing frame has reached its swing position. The first sensor 3 and the second sensor 4 transmit the information that the swing frame has not reached its swing position to the control chip. The control chip controls and extends the commutation time of the commutation circuit of the swing frame 2, thus delaying the commutation of the swing frame 2, that is, delaying the time for the swing frame 2 to change its swing direction. When the first sensor 3 and the second sensor 4 detect that the swing frame has reached its swing position, the first sensor 3 and the second sensor 4 transmit the information that the swing frame has reached its swing position to the control chip. At this time, the control chip controls the swing frame 2 to change its swing direction. Conversely, when the load on the swing frame 2, such as the blades, is heavy, the swing amplitude will decrease. In cases of lighter impact, the control chip advances the time for the swing frame 2 to change its swing direction, thus preventing excessive swing amplitude. The swing stroke of the swing frame 2 is controlled in a closed loop by the first sensor 3, the second sensor 4, and the control chip to ensure that the swing frame 2 can swing to the correct position during operation, thereby ensuring that the blades connected to the swing frame have sufficient shearing force and improving the shaving experience of the hair trimmer. The control chip has a preset control program that delays or advances the time for the swing frame 2 to change its swing direction. The delay or advance time can be increased in units of time. For example, if the swing frame 2 still cannot swing to the correct position after being delayed or advanced by one unit of time, it will be delayed or advanced by another unit of time until the swing frame 2 swings to the correct position.

[0031] SeeFigures 1-3 Both the first sensor 3 and the second sensor 4 are photoelectric sensors, used to detect the swing stroke of the swing frame 2. The photoelectric sensors are non-contact sensors, avoiding contact with the swing frame 2 which would weaken its swing force. The sensor selection is appropriate. Alternatively, Hall effect sensors or other non-contact sensors could be used for the first sensor 3 and the second sensor 4. A switch is electrically connected to the first sensor 3 and the second sensor 4. When the swing motor is not working, the switch controls the first sensor 3 and the second sensor 4 to cut off power, reducing energy consumption. Both the first sensor 3 and the second sensor 4 are reflective photoelectric sensors, and the swing frame 2 is equipped with... The device is equipped with a reflective part 5. When the swing frame 2 swings to the first limit position, the swing frame 2 moves the reflective part 5 to the detection area of ​​the first sensor 3, so that the reflective part 5 can be detected by the first sensor 3. When the swing frame 2 is not located at the first limit position, the reflective part 5 is not located in the detection area of ​​the first sensor 3 and cannot be detected by the first sensor 3. When the swing frame 2 swings to the second limit position, the swing frame 2 moves the reflective part 5 to the detection area of ​​the second sensor 4, so that the reflective part 5 can be detected by the second sensor 4. When the swing frame 2 is not located at the second limit position, the reflective part 5 is not located in the detection area of ​​the second sensor 4 and cannot be detected by the second sensor 4.

[0032] See Figure 1 and Figure 2 The first sensor 3 and the second sensor 4 are disposed on the same side of the reflective part 5. The reflective part 5 is a first smooth reflective plane and is formed on the swing frame 2. No other parts are required, the structure is simple and the production cost is low. The first smooth reflective plane is rectangular. The first sensor 3 and the second sensor 4 emit light towards the reflective part 5. When the swing frame 2 swings to the first limit position, the reflective part 5 reflects the light emitted by the light emitting element of the first sensor 3 back to the light receiving element of the first sensor 3. When the swing frame 2 swings to the second limit position, the reflective part 5 reflects the light emitted by the light emitting element of the second sensor 4 back to the light receiving element of the second sensor 4. The reflective part 5 can also be divided into two separate, unconnected planes, with each plane corresponding to one of the two sensors for detection.

[0033] See Figures 1-3 A first circuit board 6 is provided on one side of the main body 1. The first sensor 3 and the second sensor 4 are both electrically connected to the first circuit board 6. The first circuit board 6 is located on one side of the main body 1 in the X-axis direction. Bolts connect the first circuit board 6 to the main body 1, fixing the first circuit board 6 to the main body 1. The first circuit board 6 has bolt holes 61 for mounting the bolts. The first circuit board 6 is easy to install, has a simple structure, and low production cost. The first circuit board 6 is electrically connected to the control chip, and the first and second sensors transmit signals to the control chip through the first circuit board 6. Figure 4 and Figure 5The circuit diagrams shown are for the H-bridge commutation circuit of the motor and the power supply circuits for the first and second sensors of this utility model. These are existing technologies and will not be described in detail here.

[0034] Example 2:

[0035] See Figures 7-9 The difference between this second embodiment and the first embodiment is that: the first sensor 3 and the second sensor 4 are respectively placed on both sides of the swing frame 2; the reflective part 5 includes a second smooth reflective plane 51 and a third smooth reflective plane 52, which are respectively disposed on both sides of the swing frame 2 in the Y-axis direction, that is, the swing frame 2 swings between the second smooth reflective plane 51 and the third smooth reflective plane 52; when the swing frame 2 swings to the first limit position, the swing frame 2 drives the second smooth reflective plane 51 to the detection area of ​​the first sensor 3, so that the second smooth reflective plane 51 is detected by the first sensor 3; when the swing frame 2 swings to the second limit position, the swing frame 2 drives the third smooth reflective plane 52 to the detection area of ​​the second sensor 4, so that the third smooth reflective plane 52 is detected by the second sensor 4; this second embodiment provides another installation method for the first sensor 3 and the second sensor 4, which can be determined according to the installation space and components inside the hair trimmer product housing. The layout is chosen to select a suitable installation method; the swing frame 2 is provided with a protrusion 21, and the second smooth reflective plane 51 and the third smooth reflective plane 52 are respectively provided on the two side end faces of the protrusion 21. The protrusion 21 is integrally set on the swing frame 2, which has a simple structure and low production cost; the length of the protrusion 21 can be designed according to the swing stroke of the swing frame; the body 1 is provided with a second circuit board 71 and a third circuit board 72, which are electrically connected to the control chip; the second circuit board 71 and the third circuit board 72 are respectively placed on both sides of the protrusion 21, the first sensor 3 is electrically connected to the side of the second circuit board 71 near the second smooth reflective plane 51, and the second sensor 4 is electrically connected to the side of the third circuit board 72 near the third smooth reflective plane 52; the body 1 is provided with a number of positioning protrusions 101, and the second circuit board 71 is provided with positioning holes 711 that engage with the positioning protrusions 101; the third circuit board 72 is also provided with corresponding positioning holes for installation and positioning.

[0036] The reciprocating swing motor with stroke detection in this utility model has a simple structure and low production cost. It is equipped with a detection mechanism that can detect the swing stroke of the swing frame and control the swing frame to swing into position through a control chip, thereby ensuring that the blades on the swing frame have sufficient shearing force. The swing stroke of the swing frame is detected by a photoelectric sensor. The photoelectric sensor is a non-contact detection method, which avoids contact with the swing frame and thus avoids weakening the swing force of the swing frame. The sensor selection is reasonable. The reflective part is formed on the swing frame, eliminating the need for other parts. The structure is simple and the production cost is low.

[0037] This utility model also provides a hair trimmer, including the above-mentioned reciprocating oscillating motor with stroke detection. This hair trimmer also has the beneficial effects of the above-mentioned reciprocating oscillating motor with stroke detection, which will not be described in detail here.

[0038] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A reciprocating oscillating motor with stroke detection, comprising: The body (1) is provided with a reciprocating swing swing frame (2), the swing frame (2) has a first limit position and a second limit position in the swing process, the swing frame (2) changes the swing direction at the first limit position and the second limit position, characterized in that the body (1) is provided with a detection mechanism for detecting the swing stroke of the swing frame (2), the detection mechanism comprises a first sensor (3) and a second sensor (4), the first sensor (3) is used for detecting whether the swing frame (2) is located at the first limit position, the second sensor (4) is used for detecting whether the swing frame (2) is located at the second limit position, the body (1) is connected with a control chip for controlling the swing frame (2) to change the swing direction, the first sensor (3) and the second sensor (4) are electrically connected with the control chip; when the first sensor (3) detects that the swing frame (2) swings to the first limit position, the control chip controls the swing frame (2) to change the swing direction; when the second sensor (4) detects that the swing frame (2) swings to the second limit position, the control chip controls the swing frame (2) to change the swing direction.

2. The reciprocating oscillating motor with stroke detection according to claim 1, characterized in that The first sensor (3) and the second sensor (4) are both photoelectric sensors.

3. The reciprocating oscillating motor with stroke detection of claim 1, wherein, The first sensor (3) and the second sensor (4) are both reflective photoelectric sensors, the swing frame (2) is provided with a reflective part (5), when the swing frame (2) swings to the first limit position, the swing frame (2) drives the reflective part (5) to the detection area of the first sensor (3), so that the reflective part (5) is detected by the first sensor (3); when the swing frame (2) swings to the second limit position, the swing frame (2) drives the reflective part (5) to the detection area of the second sensor (4), so that the reflective part (5) is detected by the second sensor (4).

4. The reciprocating oscillating motor with stroke detection according to claim 3, characterized in that The first sensor (3) and the second sensor (4) are arranged on the same side of the reflective part (5), and the reflective part (5) is a first smooth reflective plane.

5. The reciprocating oscillating motor with stroke detection of claim 1, wherein, One side of the body (1) is provided with a first circuit board (6), and the first sensor (3) and the second sensor (4) are electrically connected with the first circuit board (6).

6. The reciprocating oscillating motor with stroke detection according to claim 5, characterized in that The first circuit board (6) and the body (1) are connected by a bolt.

7. The reciprocating oscillating motor with stroke detection according to claim 3, characterized in that, The first sensor (3) and the second sensor (4) are respectively arranged on two sides of the swing frame (2), the reflective part (5) comprises a second smooth reflective plane (51) and a third smooth reflective plane (52), the second smooth reflective plane (51) and the third smooth reflective plane (52) are respectively arranged on two side end faces of the convex block (21); when the swing frame (2) swings to the first limit position, the swing frame (2) drives the second smooth reflective plane (51) to the detection area of the first sensor (3), so that the second smooth reflective plane (51) is detected by the first sensor (3); when the swing frame (2) swings to the second limit position, the swing frame (2) drives the third smooth reflective plane (52) to the detection area of the second sensor (4), so that the third smooth reflective plane (52) is detected by the second sensor (4).

8. The reciprocating oscillating motor with stroke detection according to claim 7, characterized in that The swing frame (2) is provided with a convex block (21), and the second smooth reflective plane (51) and the third smooth reflective plane (52) are respectively arranged on two side end faces of the convex block (21).

9. The belt stroke detected reciprocating swing motor according to claim 8, characterized by, The body (1) is provided with a second circuit board (71) and a third circuit board (72), the second circuit board (71) and the third circuit board (72) are respectively arranged on two sides of the convex block (21), the first sensor (3) is electrically connected to one side of the second circuit board (71) close to the second smooth reflective plane (51), and the second sensor (4) is electrically connected to one side of the third circuit board (72) close to the third smooth reflective plane (52).

10. A hair trimmer characterized by The reciprocating swing motor with stroke detection comprises the reciprocating swing motor and the stroke detection device.

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