Motor drive device and swing device thereof

Abstract

The present invention discloses a motor drive device and its swinging device. The motor drive device includes a housing and a transmission shaft. The transmission shaft is connected to the motor shaft, and a portion of the transmission shaft is located within the housing. The motor drive device also includes an optical base and an optical reflector assembly built into the housing. The optical reflector assembly has an optical reflective element. The transmission shaft extends through the optical base, with a rotational gap between the transmission shaft and the optical base. A group of optical sensors is provided on each side of the optical base, each group of optical sensors having a transmitting end and a receiving end. After extending from the optical base, the transmission shaft is connected to the optical reflector assembly. When the transmission shaft rotates relative to the optical base in a first direction, it drives the optical reflector assembly to rotate synchronously. The present invention also discloses its swinging device.

Description

Technical Field

[0001] The present invention relates to a swing device, in particular to a motor drive device and a swing device thereof. Background Art

[0002] The swing device for infants and young children has the functions of both a sleeping bed and a rocking bed. It can provide infants and young children with a place to sleep and a place for them to rock, and is therefore popular among consumers.

[0003] The control of the swing device is achieved through the swinging of the swing arm of the swing device, and the swing arm is controlled by a motor drive device. Therefore, the motor drive device that controls the swing arm is very important. The motor drive device must be able to ensure that the swing amplitude of the swing arm of the swing device reaches the preset swing angle, and be able to detect the swing amplitude of the swing arm so that the swing amplitude of the swing device meets the requirements.

[0004] Most existing motor drive devices of swing devices use grating plates to control the swing angle. The use of grating structures not only makes the motor drive device complex and bulky, but also cannot accurately control the swing angle. Summary of the Invention

[0005] The object of the present invention is to provide a motor driving device that uses an optical sensor to transmit and receive light and an optical reflective element to reflect light to control the rotation angle of the motor, thereby achieving the purpose of controlling the swing angle.

[0006] The above-mentioned object of the present invention is achieved through the following technical solution: a motor drive device, comprising a housing and a transmission shaft, the transmission shaft being connected to the motor shaft, and a partial shaft section of the transmission shaft being located in the housing, characterized in that: the motor drive device also includes an optical seat and an optical reflection assembly built into the housing, the optical reflection assembly having an optical reflection element, the transmission shaft passing through the optical seat and extending out, and a rotation gap being provided between the transmission shaft and the optical seat, a group of optical sensors being provided on the left and right sides of the optical seat, each group of optical sensors having a transmitting end and a receiving end, the transmission shaft being connected to the optical reflection assembly after extending out of the optical seat, when the transmission shaft rotates relative to the optical seat in a first direction, the optical reflection assembly is driven to rotate synchronously, and when the optical reflection element rotates to the position where the optical sensor is located, the light emitted by the transmitting end of the optical sensor is reflected back to the receiving end, and the signal is transmitted to the motor, driving the motor to rotate in a second direction opposite to the first direction.

[0007] The motor drive device of the present invention uses optical elements to sense the rotation angle of a drive shaft. An optical mount with an optical sensor and an optical reflective element connected to the drive shaft are provided. The drive shaft serves as the motor output shaft. The rotation angle of the drive shaft relative to the optical mount is detected by light emission and reception from the optical sensor and light reflection from the optical reflective element. By controlling the rotation angle of the motor, the swing angle of the drive shaft and the swing arm of a swing mechanism fixedly connected to the drive shaft are controlled. Unlike existing swing mechanisms that use gratings to control the swing angle, this motor drive device replaces the traditional grating structure with an optical sensor and an optical reflective element, eliminating the need for a grating, resulting in a simple structure and precise control.

[0008] In the present invention, the optical base is a component, including an upper optical base located above and a lower optical base located below. The upper optical base and the lower optical base are mounted on the transmission shaft in series. The two groups of optical sensors are respectively arranged on the outer circumferences of the upper optical base and the lower optical base, and the two groups of optical sensors are staggered in the height direction.

[0009] The optical mount of the present invention adopts a split structure, which facilitates adjustment of the upper and lower optical mounts, thereby adjusting the angle between the two sets of optical sensors, allowing the motor drive device to achieve multi-level control at different angles. The upper and lower optical mounts can be adjusted independently or synchronously.

[0010] As a preferred embodiment of the present invention, the upper optical seat and the lower optical seat adopt a synchronous adjustment design, and the adjustment angle is more accurate: the motor drive device also includes an angle rotation rod for controlling multiple rotation angles, and the angle rotation rod is inserted into the housing. One end of the angle rotation rod is located in the housing and engages with the upper optical seat and the lower optical seat respectively, and the other end of the angle rotation rod extends out of the housing. Rotating the angle rotation rod can drive the upper optical seat and the lower optical seat to rotate synchronously in opposite directions, thereby adjusting the angle between the two groups of optical sensors, that is, adjusting the swing amplitude of the transmission shaft.

[0011] Multiple gears refer to multiple different angle gears with different left and right swing angles. For example, in the first gear, the left and right swing amplitudes are both 10 degrees, and the total swing amplitude is 20 degrees; in the second gear, the left and right swing amplitudes are both 20 degrees, and the total swing amplitude is 40 degrees; in the third gear, the left and right swing amplitudes are both 30 degrees, and the total swing amplitude is 60 degrees, and so on.

[0012] In the present invention, the angle rotation rod is engaged with the upper optical seat and the lower optical seat respectively, and the angle rotation rod synchronously drives the upper optical seat and the lower optical seat to rotate in opposite directions, thereby bidirectionally and synchronously adjusting the angle between the two groups of optical sensors.

[0013] During use, in order to ensure that the swing amplitude of the swing arm of the swing device reaches the preset angle of each gear, it is necessary to detect the swing amplitude of the swing arm to ensure that the swing amplitude of the swing arm reaches the preset angle. The multi-speed adjustment of the present invention, a group of adjustment mechanisms composed of an upper optical seat, a lower optical seat and an angle rotation rod, can realize the monitoring of the swing arms of different gears with only two groups of optical sensors and an optical reflective element, using fewer devices and low cost, and the multi-speed adjustment greatly expands the use space of the motor drive device. As a preferred embodiment of the present invention, the upper optical seat and the lower optical seat are symmetrically arranged on both sides of the axial direction of the angle rotation rod, and the upper optical seat and the lower optical seat both have obliquely arranged bevel teeth. The angle rotation rod is located at one end of the shell and also has obliquely arranged bevel teeth. The angle rotation rod is engaged with the upper optical seat and the lower optical seat through the bevel teeth.

[0014] The present invention adopts a bevel gear meshing structure, which has a strong bite force, prevents slipping during the force transmission process, and enhances the accuracy of the transmission.

[0015] In the present invention, a mounting frame is disposed within the housing, and the upper and lower optical mounts are both mounted within the mounting frame. The end of the angle rotation rod that engages with the upper and lower optical mounts is located within the mounting frame. The mounting frame serves as a mounting support for the optical mount and is fixedly disposed within the housing.

[0016] In the present invention, the mounting frame is cylindrical, and the middle part of the mounting frame has two hollow seat cylinders located at upper and lower positions separated by an intermediate horizontal partition, the two seat cylinders are respectively used to fit the upper optical seat and the lower optical seat, and the transmission shaft passes through the two seat cylinders; the side of the mounting frame is provided with a rod hole and two arc-shaped angle control windows located at upper and lower positions and with the same structure, the meshing part of the upper optical seat, the lower optical seat and the angle rotation rod is located in the mounting frame, the parts of the upper optical seat and the lower optical seat away from the bevel teeth pass through and extend out of the angle control window, the window angle of the angle control window limits the rotation angle of the upper optical seat and the lower optical seat, and the maximum rotation angle is when the upper optical seat and the lower optical seat rotate and hit the angle control window; the angle rotation rod is inserted into the rod hole.

[0017] In the present invention, the outer side of the mounting frame is further provided with ears, which are hooked in the shell through the ears; the inner wall of the shell is further provided with a rotating rod support piece, which supports the angle rotating rod.

[0018] As an improvement of the present invention: one end of the angle rotating rod extending out of the housing is further fixedly connected to a knob, and the angle rotating rod is driven to rotate by the knob.

[0019] In the present invention, the optical sensor is preferably an LED optical sensor, but other optical sensors may also be used.

[0020] As a preferred embodiment of the present invention, the optical reflective element is a lens. The optical reflective element may also be replaced by a reflective metal sheet or a reflective plastic sheet.

[0021] In the present invention, when the controller is in an initial non-operating state, the optical reflective element is located between the two groups of optical sensors, and the center lines of the two groups of optical sensors on the vertical plane coincide with the center line of the optical reflective element on the vertical plane.

[0022] In the present invention, the optical reflector assembly further includes a lens holder, to which the lens is fixed. The lens holder is fixedly mounted on the end of the transmission shaft extending from the optical holder. When the transmission shaft rotates, the lens holder and the lens rotate synchronously. In this structure, the transmission shaft is directly and fixedly connected to the lens holder, resulting in a simple structure and clear force transmission.

[0023] The swing device including the above-mentioned motor drive device also includes a base, a frame and a motor, and is characterized in that: the motor drive device is installed on the base, the frame has a swing arm, the swing arm is connected to the transmission shaft, the transmission shaft serves as the motor output shaft, and is connected to the motor shaft of the motor. The motor has a built-in control unit, and the control unit can receive the light signal transmitted by the optical sensor to drive the motor to rotate.

[0024] In the present invention, the motor is a forward and reverse micro motor, which is built into the upper space of the housing, and the motor shaft of the motor is connected to the middle and upper shaft section of the transmission shaft. The micro motor is small in size and compact in structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Figure 1 Schematic diagram of the overall structure of the motor drive device of the present invention;

[0027] Figure 2 An exploded view of the motor drive device of the present invention;

[0028] Figure 3 An assembly diagram of some parts of the motor drive device of the present invention after removing the outer shell;

[0029] Figure 4 A parts diagram of a housing in a motor drive device of the present invention;

[0030] Figure 5 A diagram showing the parts of the mounting frame in the motor drive device of the present invention;

[0031] Figure 6 A diagram showing the parts of a rotating rod in the motor drive device of the present invention;

[0032] Figure 7 A parts diagram of the upper optical seat in the motor drive device of the present invention;

[0033] Figure 8 A parts diagram of the lower optical seat in the motor drive device of the present invention;

[0034] Figure 9 A parts diagram of a lens holder in the motor drive device of the present invention;

[0035] Figure 10 This is a parts diagram of the LED optical sensor in the motor drive device of the present invention.

[0036] In the figure: 1. Shell; 2. Upper LED circuit board; 3. Mounting frame; 31. Base tube; 32. Angle control window; 33. Rod hole; 34. Ear; 4. Upper optical seat; 5. Rotating rod; 6. Knob; 7. Lower optical seat; 8. Lower LED circuit board; 9. Rotating rod support plate; 10. Lens; 11. Lens seat; 12. Transmission shaft; 13. Bottom shell; 14. LED optical sensor. DETAILED DESCRIPTION

[0037] like Figures 1 to 10 The motor drive device shown includes a housing and a transmission shaft 12. The housing includes a shell 1 and a bottom shell 13. The transmission shaft 12 is connected to the motor shaft, with a portion of the transmission shaft 12 located within the housing. The transmission shaft 12 serves as the output shaft of the motor. The motor drive device also includes an optical base and an optical reflector assembly built into the housing. The optical base is supported within a mounting frame 3 disposed within the housing. The optical reflector assembly includes an optical reflector element. The transmission shaft 12 extends through the optical base, with a rotational clearance between the transmission shaft 12 and the optical base. A set of optical sensors is provided on each side of the optical base, each set of optical sensors having a transmitting end and a receiving end. After extending from the optical base, the transmission shaft 12 connects to the optical reflector assembly. The optical sensor in this embodiment is an LED optical sensor 14, but other optical sensors may also be used.

[0038] Drive shaft 12 rotates under the influence of a motor. When drive shaft 12 rotates relative to the optical base in a first direction, it drives the optical reflective assembly to rotate synchronously. Specifically, when drive shaft 12 and the optical reflective assembly rotate, the optical base remains stationary. When the optical reflective element rotates to the position of the optical sensor, light emitted by the optical sensor's transmitting end is reflected back to the receiving end, and this signal is transmitted to the motor, which drives the motor to rotate in a second direction opposite to the first direction, thereby controlling drive shaft 12. The swinging of drive shaft 12 drives the swing arm of a swing mechanism fixedly connected thereto to swing synchronously. The swing arm of the swing mechanism is fixedly connected to the end of drive shaft 12 that extends out of the housing. The first and second directions herein are simply used to indicate opposite directions of rotation.

[0039] In this embodiment, the optical base is an assembly comprising an upper optical base 4 positioned above and a lower optical base 7 positioned below. The upper and lower optical bases 4 and 7 are attached in series to a transmission shaft 12. Two sets of optical sensors are positioned on the outer circumferences of the upper and lower optical bases 4 and 7, respectively, and are offset in height to create a height difference. The split structure of the optical base facilitates manipulation of the upper and lower optical bases 4 and 7 to adjust the rotational angle between the two sets of optical sensors. This rotational angle is the swing angle of the swing arm of the swing mechanism.

[0040] The motor drive device also includes an angle rotation lever 5 for adjusting multiple rotation angles. The angle rotation lever 5 is inserted into the housing. One end of the angle rotation lever 5, located within the housing, engages with the upper optical base 4 and the lower optical base 7, respectively. The other end of the angle rotation lever 5 extends out of the housing. Rotating the angle rotation lever 5 causes the upper and lower optical bases 4 and 7 to rotate synchronously in opposite directions, thereby adjusting the angle between the two sets of optical sensors, and thus adjusting the rotation angle of the transmission shaft 12. One of the two sets of LED optical sensors 14 is soldered to the upper LED circuit board 2 with wires, then installed in a slot in the upper optical base 4 and secured with screws. The other set is soldered to the lower LED circuit board 8 with wires, then installed in a slot in the lower optical base 7 and secured with screws.

[0041] Multiple gears refer to multiple different angle positions, allowing for different left and right swing angles. Once the angle rotation lever 5 adjusts the position of the upper optical base 4 and lower optical base 7, the gear position is determined. Once the gear position is determined, the upper optical base 4 and lower optical base 7 remain stationary. When the motor is operating, the transmission shaft 12 drives the optical reflector assembly to rotate relative to the upper optical base 4 and lower optical base 7.

[0042] In this embodiment, the specific positions and connection relationship between the upper optical base 4, the lower optical base 7, and the angle rotation rod 5 are as follows: the upper optical base 4 and the lower optical base 7 are arranged symmetrically on either side of the axial direction of the angle rotation rod 5. The upper optical base 4 and the lower optical base 7 each have obliquely arranged bevel teeth. The angle rotation rod 5 is located at one end of the housing and also has obliquely arranged bevel teeth. The angle rotation rod 5 engages with the upper optical base 4 and the lower optical base 7 through the bevel teeth. The angle rotation rod 5 can adjust the upper optical base 4 and the lower optical base 7 simultaneously. When the angle rotation rod 5 rotates, the upper optical base 4 and the lower optical base 7 rotate synchronously in opposite directions, which is convenient for operation. The angles of the upper and lower optical bases 4 and 7 are adjusted to the same, allowing for precise control.

[0043] In this embodiment, the mounting frame 3 provided in the housing is cylindrical with a side opening. The middle portion of the mounting frame 3 has two hollow seat tubes 31 located in upper and lower positions separated by an intermediate transverse partition. The two seat tubes 31 are used to respectively set the upper optical seat 4 and the lower optical seat 7. The upper optical seat 4 and the lower optical seat 7 are accommodated in the two seat tubes 31 of the mounting frame 3. One end of the angle rotation rod 5 that engages with the upper optical seat 4 and the lower optical seat 7 is also located in the mounting frame 3. The intermediate transverse partition is provided with a center hole for the transmission shaft 12 to pass through. The transmission shaft 12 passes through the two seat tubes 31 from the middle and is connected to the seat tubes 31. There is a rotation gap between them; a rod hole 33 and two arc-shaped angle control windows 32 with the same structure are opened on the side of the mounting frame 3; the meshing part of the upper optical seat 4, the lower optical seat 7 and the angle rotation rod 5 is located inside the mounting frame 3; the upper optical seat 4 and the lower optical seat 7 away from the bevel teeth pass through and extend out of the angle control window 32; the opening angle of the angle control window 32 limits the rotation angle of the upper optical seat 4 and the lower optical seat 7; when the upper optical seat 4 and the lower optical seat 7 rotate, they contact the angle control window 32, which is the maximum rotation angle; the angle rotation rod 5 is inserted into the rod hole 33.

[0044] The mounting bracket 3 is also provided with an ear portion 34 on its exterior, which allows it to be hooked into the housing. A rotation rod support piece 9 is also provided on the inner wall of the housing. This support piece 9 is screwed to the inner wall of the housing 1 and supports the angle rotation rod 5, enhancing its stability. A knob 6 is fixedly connected to the end of the angle rotation rod 5 that extends beyond the housing, which drives the rotation of the angle rotation rod 5. The angle rotation rod 5 and knob 6 are glued together.

[0045] The optical reflective element in this embodiment is a lens 10. The optical reflective element can also be a reflective metal sheet or a reflective plastic sheet. When the motor drive device is in an initial state where it is not working, the lens 10 is located between the two groups of optical sensors. The center lines of the two groups of optical sensors on the vertical plane coincide with the center line of the lens 10 on the vertical plane, that is, the center line of the lens 10 coincides with the swing origin of the transmission shaft 12. The two groups of optical sensors are distributed left and right with the swing origin of the transmission shaft 12 as the center, and the angles between the two groups of optical sensors and the swing origin of the transmission shaft 12 are the same.

[0046] In this embodiment, the optical reflective assembly further includes a lens holder 11, on which a lens 10 is fixed. The lens 10 is glued into a slot in the lens holder 11 by means of glue to form a whole. The lens holder 11 is fixed with a drive shaft 12 extending from the protruding end of the optical holder. The drive shaft 12 is directly and fixedly connected to the lens holder 11. When the drive shaft 12 rotates, it drives the lens holder 11 and the lens 10 to rotate synchronously.

[0047] The swing device includes the motor drive device, which also includes a base, a frame and a motor. The motor drive device is installed on the base. The frame has a swing arm, which is connected to the transmission shaft 12 and to the end of the transmission shaft 12 away from the lens seat 11. The transmission shaft 12 serves as the motor output shaft and is connected to the motor shaft of the motor. The motor has a built-in control unit, which can receive the light signal transmitted by the optical sensor and drive the motor to rotate.

[0048] In this embodiment, the motor is a forward and reverse micromotor. The motor is built into the upper space of the housing and is located above the mounting frame 3. The motor shaft of the motor is connected to the middle and upper shaft section of the transmission shaft 12. The transmission shaft 12 is driven by the motor to rotate. The two ends of the transmission shaft 12 are fixedly connected to the lens holder 11 and the swing arm of the swing device, respectively. Therefore, when the transmission shaft 12 rotates, the lens holder 11 and the swing arm of the swing device are synchronously driven to swing. The rotation angle of the lens holder 11 and its lens 10, the rotation angle of the swing arm of the swing device, and the rotation angle of the transmission shaft 12 are the same.

[0049] As a variation of this embodiment, the motor may also be arranged outside the housing, as long as the motor is able to drive the transmission shaft 12 to rotate.

[0050] The present invention does not require a grating plate, but instead relies directly on the emission and reception of infrared LEDs and the reflection of lenses to achieve the purpose of controlling the swing angle. During use, in order to ensure that the swing amplitude of the swing arm of the swing device accurately reaches the preset angle for each gear, it is necessary to detect the swing amplitude of the swing arm to ensure that the swing amplitude reaches the preset angle. The present invention adopts multi-level adjustment, using a single adjustment mechanism consisting of an upper optical base 4, a lower optical base 7, and an angle rotation rod 5. Only two sets of LED optical sensors 14 and a lens 10 are used to monitor the swing arm in different gears. This reduces the number of components used, has a simple structure, and provides precise control.

[0051] The working principle of the motor drive device of the present invention for controlling the angle is as follows:

[0052] When the motor drive device is in an initial state without working, the lens 10 is located between the two groups of LED optical sensors 14, the center lines of the two groups of LED optical sensors 14 on the vertical plane coincide with the center lines of the lens 10 on the vertical plane, and the angle between the two groups of LED optical sensors 14 is zero.

[0053] Manually rotating the knob 6 to different positions drives the angle rotation rod 5 to rotate. Because the upper optical base 4 and the lower optical base 7 are respectively engaged with the angle rotation rod 5 via obliquely arranged bevel teeth, the rotation of the angle rotation rod 5 causes the upper and lower optical bases 4 and 7 to rotate synchronously in opposite directions. When the angle rotation rod 5 rotates clockwise, it drives the upper optical base 4 to rotate counterclockwise and the lower optical base 7 to rotate clockwise. The angle between the two sets of LED optical sensors 14 changes from zero to Angle A. Angle A is the effective rotation angle. This Angle A is the angle that the motor drive device controls the transmission shaft 12 to rotate, which is also the swing angle of the swing arm of the swing device. When the knob 6 is adjusted to different positions, the angle A also changes accordingly, thereby adjusting multiple rotation angles.

[0054] When the motor rotates, the motor shaft drives the transmission shaft 12 to rotate. The transmission shaft 12 serves as the motor output shaft. When the transmission shaft 12 rotates, the lens holder 11 and the lens 10 rotate. When the transmission shaft 12 rotates, the mounting frame 3 and the upper optical holder 4 and the lower optical holder 7 are all stationary.

[0055] When the lens 10 rotates to the position of the LED optical sensor 14 in the slot of the lower optical base 7, the light emitted by the transmitting end of the LED optical sensor 14 is reflected by the lens 10 and returned to the receiving end. The light signal is then transmitted back through the LED optical sensor 14 to the control unit in the motor. The control unit then transmits a signal back to the motor, driving the motor to rotate in the reverse direction. The reverse rotation of the motor also drives the lens 10 to rotate in the reverse direction.

[0056] After the motor rotates in the reverse direction, when the lens 10 rotates to the position of the LED optical sensor 14 in the slot of the upper optical seat 4, the light emitted by the transmitting end of the LED optical sensor 14 is reflected back to the receiving end through the lens 10, and the light signal is transmitted back to the control unit in the motor through the LED optical sensor 14. The control unit then transmits a signal back to the motor, driving the motor to rotate in the reverse direction again.

[0057] Since an angle A is formed between the LED optical sensor 14 on the slot of the lower optical seat 7 and the LED optical sensor 14 on the upper optical seat 4, when the lens 10, which is fixed and rotates in the same direction as the transmission shaft 12 serving as the motor output shaft, reaches the position of the LED optical sensor 14 on the slot of the lower optical seat 7 or the LED optical sensor 14 on the slot of the upper optical seat 4, the LED optical sensor 14 completes the output and reception of light and transmits it back to the control unit of the motor. The control unit drives the motor to change the direction of rotation, and the motor can rotate back and forth between the angles A, driving the transmission shaft 12 to rotate back and forth at the angle A, so that the swing arm of the swing device fixedly connected to the transmission shaft 12 swings back and forth at the angle A, ensuring that the swing amplitude of the swing arm of the swing device exactly reaches the preset angle A corresponding to different gears.

Claims

1. A motor drive device comprising a housing and a transmission shaft (12), wherein the transmission shaft (12) is connected to a motor shaft, and a portion of the transmission shaft (12) is located within the housing, characterized in that: The motor drive device also includes an optical seat and an optical reflection component built into the shell, the optical reflection component has an optical reflection element, the transmission shaft (12) passes through the optical seat and extends out, and there is a rotation gap between the transmission shaft (12) and the optical seat, a group of optical sensors are arranged on the left and right sides of the optical seat, each group of optical sensors has a transmitting end and a receiving end, the transmission shaft (12) is connected to the optical reflection component after extending out of the optical seat, and the transmission shaft (12) drives the optical reflection component to rotate synchronously when it rotates relative to the optical seat around a first direction, and when the optical reflection element rotates to the position where the optical sensor is located, the light emitted by the transmitting end of the optical sensor is reflected back to the receiving end, and the signal is transmitted to the motor, driving the motor to rotate around a second direction opposite to the first direction.

2. The motor drive device according to claim 1, wherein: The optical seat is a component, comprising an upper optical seat (4) located above and a lower optical seat (7) located below. The upper optical seat (4) and the lower optical seat (7) are mounted on the transmission shaft (12) in a series manner. The two optical sensors are respectively arranged on the outer circumferences of the upper optical seat (4) and the lower optical seat (7), and the two optical sensors are staggered in the height direction.

3. The motor drive device according to claim 2, wherein: The motor drive device further comprises an angle rotation rod (5) for regulating the multi-speed rotation angle, wherein the angle rotation rod (5) is inserted into the housing, and one end of the angle rotation rod (5) located in the housing is respectively engaged with the upper optical seat (4) and the lower optical seat (7), and the other end of the angle rotation rod (5) extends out of the housing. Rotating the angle rotation rod (5) can drive the upper optical seat (4) and the lower optical seat (7) to rotate synchronously in opposite directions, thereby adjusting the angle between the two optical sensors, that is, adjusting the swing amplitude of the transmission shaft (12).

4. The motor drive device according to claim 3, wherein: The upper optical seat (4) and the lower optical seat (7) are symmetrically arranged on both sides of the axial direction of the angle rotation rod (5), and the upper optical seat (4) and the lower optical seat (7) both have obliquely arranged bevel teeth. The angle rotation rod (5) is located at one end of the housing and also has obliquely arranged bevel teeth. The angle rotation rod (5) is engaged with the upper optical seat (4) and the lower optical seat (7) through the bevel teeth.

5. The motor drive device according to claim 4, characterized in that: A mounting frame (3) is provided in the housing, the upper optical seat (4) and the lower optical seat (7) are both mounted in the mounting frame (3), and one end of the angle rotation rod (5) that engages with the upper optical seat (4) and the lower optical seat (7) is located in the mounting frame (3).

6. The motor drive device according to claim 5, characterized in that: The mounting frame (3) is cylindrical, and the middle part of the mounting frame (3) has two hollow seat cylinders (31) located at upper and lower positions separated by an intermediate transverse partition. The two seat cylinders (31) are used to respectively fit the upper optical seat (4) and the lower optical seat (7). The transmission shaft (12) passes through the two seat cylinders (31). A rod hole (33) and two arc-shaped angle control windows (32) with the same structure located at upper and lower positions are opened on the side of the mounting frame (3). The upper optical seat (4), The meshing portion of the lower optical seat (7) and the angle rotation rod (5) is located inside the mounting frame (3). The portions of the upper optical seat (4) and the lower optical seat (7) away from the bevel teeth pass through and extend out of the angle control window (32). The opening angle of the angle control window (32) limits the rotation angle of the upper optical seat (4) and the lower optical seat (7). When the upper optical seat (4) and the lower optical seat (7) rotate, the maximum rotation angle is when they contact the angle control window (32). The angle rotation rod (5) is inserted into the rod hole (33).

7. The motor drive device according to claim 6, characterized in that: The outer side of the mounting frame (3) is further provided with an ear portion (34); the inner wall of the shell is further provided with a rotating rod support piece (9), and the rotating rod support piece (9) supports the angle rotating rod (5).

8. The motor drive device according to claim 4, characterized in that: One end of the angle rotating rod (5) extending out of the housing is also fixedly connected to a knob (6), and the angle rotating rod (5) is driven to rotate by the knob (6).

9. The motor drive device according to claim 2, wherein: The optical sensor is an LED optical sensor (14).

10. The motor drive device according to claim 2, wherein: The optical reflective element is a lens (10).

11. The motor drive device according to any one of claims 2 to 10, characterized in that: When the motor drive device is in an initial non-operating state, the optical reflective element is located between the two groups of optical sensors, and the center lines of the two groups of optical sensors on the vertical plane coincide with the center line of the optical reflective element on the vertical plane.

12. The motor drive device according to claim 11, characterized in that: The optical reflection assembly further comprises a lens seat (11), the optical reflection element is fixed on the lens seat (11), and the lens seat (11) is fixedly sleeved with the transmission shaft (12) extending out of the end portion of the optical seat, and when the transmission shaft (12) rotates, the lens seat (11) and the optical reflection element are driven to rotate synchronously.

13. An oscillating device comprising the motor drive device according to any one of claims 1 to 12, further comprising a base, a frame and a motor, characterized in that: The motor drive device is installed on the base, the frame has a swing arm, the swing arm is connected to the transmission shaft, the transmission shaft serves as the motor output shaft, and is connected to the motor shaft of the motor. The motor has a built-in control unit, and the control unit can receive the light signal transmitted by the optical sensor to drive the motor to rotate.

14. The oscillating device according to claim 13, characterized in that: The motor is a forward and reverse micromotor, which is built into the upper space of the housing, and the motor shaft of the motor is connected to the middle upper shaft section of the transmission shaft (12).

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