An actuator having an externally integrated circuit board

Abstract

An actuator with external integrated circuit board, comprising: an actuator housing containing a mounting inner cavity; a driving device mounted on the housing; a gear transmission mechanism arranged in the mounting inner cavity and in transmission cooperation with the driving device; an output member mounted on the lower end of the housing and in transmission cooperation with the gear transmission mechanism; a first position sensing mechanism fixed on the upper end of the housing, the gear transmission mechanism being provided with a first position feedback member adapted thereto; an integrated circuit board located on the upper end of the first position sensing mechanism; a second position sensing mechanism fixed on the upper end of the integrated circuit board, the output member extending upward beyond the housing, and the output member being provided with a second position feedback member adapted thereto; and the integrated circuit board being electrically connected with the driving device, the first position sensing mechanism and the second position sensing mechanism respectively. The actuator has high detection precision, compact and reasonable structure, convenient maintenance and overload protection function.

Description

Technical Field

[0001] This utility model relates to the field of actuator technology, specifically to an actuator with an external integrated circuit board, which is particularly suitable for transmission control scenarios that require precise detection of position information. Background Technology

[0002] Actuators, as key components in the field of automation control, are widely used in machinery manufacturing, smart homes, and the automotive industry. Their main function is to transmit the power of the drive device to the output component through a transmission mechanism to achieve the predetermined mechanical action.

[0003] Example 1 of the prior art, referring to patent document CN208381442U, discloses a small electric actuator with good sealing performance, including a housing, a gear reduction assembly and a motor disposed in the housing. The input gear of the gear reduction assembly is connected to the motor for transmission, and the output gear of the gear reduction assembly is connected to an output shaft for controlling the opening and closing of a valve. The housing is also provided with a partition, which divides the housing into an independent motor chamber and a reduction chamber. The motor is located in the motor chamber, and the gear reduction assembly is located in the reduction chamber. The partition is provided with two microswitches spaced 90 degrees apart. A guide groove is opened on the partition and is located between the two microswitches. A switch lever is protruding on the output gear of the gear reduction assembly. The switch lever passes through the guide groove and is in contact with the microswitches.

[0004] Example 2 of the prior art, referring to patent document CN215806651U, discloses an actuator with an external photoelectric positioning device, including a housing, an actuator main body component, and a photoelectric positioning device. The interior of the housing is divided into a first mounting area and a second mounting area. The actuator main body component is located in the first mounting area, and the photoelectric positioning device is located in the second mounting area, with the photoelectric positioning device being drively connected to the actuator main body component. This utility model rationally divides the internal space of the housing, forming a first mounting area and a second mounting area. It abandons the original positioning gear structure, placing the complete actuator main body component in the first mounting area and the photoelectric positioning device in the second mounting area. The division between the two is clearer, and the installation and connection relationship is simpler and more reliable. Furthermore, the combination of a photoelectric encoder and a photoelectric sensor replaces the function of the positioning gear, reducing requirements for size and installation, and providing higher detection accuracy during use.

[0005] In summary, existing actuators typically integrate the position sensing mechanism and control circuit board inside the housing, which has the following shortcomings: 1. Limited position detection accuracy, mostly using a single sensing method, making it difficult to meet the position feedback requirements of different transmission stages; 2. The built-in circuit board results in a compact structure, making maintenance and replacement inconvenient, and limiting heat dissipation performance; 3. The design of the cooperation between the sensing mechanism and transmission components is unreasonable, which can easily lead to signal delay or false detection; 4. The lack of an effective clutch protection mechanism makes the internal transmission structure easily damaged when the output component is subjected to excessive external force.

[0006] To address the aforementioned problems, this invention proposes an actuator with an external integrated circuit board, which improves position detection accuracy and equipment reliability by optimizing the layout of the sensing mechanism and the circuit integration method. Summary of the Invention

[0007] In order to overcome the above-mentioned shortcomings of the prior art, this utility model aims to provide an actuator with an external integrated circuit board that is compact in structure, has high detection accuracy, is easy to maintain, and has overload protection function.

[0008] The technical solution of this utility model to solve its technical problem is: an actuator with an external integrated circuit board, comprising:

[0009] Actuator housing having an internal mounting cavity;

[0010] The drive unit is mounted on the actuator housing;

[0011] A gear transmission mechanism is configured within the mounting cavity and forms a transmission engagement with the drive device.

[0012] The output component is installed at the lower end of the actuator housing, and the output component forms a transmission engagement with the gear transmission mechanism.

[0013] It also includes:

[0014] The first position sensing mechanism is fixed to the upper end of the actuator housing. The gear transmission mechanism is provided with a first position feedback element, which is adapted to the first position sensing mechanism.

[0015] An integrated circuit board is located at the upper end of the first position sensing mechanism;

[0016] The second position sensing mechanism is fixed to the upper end of the integrated circuit board. The output component extends upward and extends to the top of the actuator housing. The output component is provided with a second position feedback component, which is adapted to the second position sensing mechanism.

[0017] The integrated circuit board is electrically connected to the driving device, the first position sensing mechanism, and the second position sensing mechanism.

[0018] In some preferred embodiments of the present invention, the first position sensing mechanism includes two first contact position sensors spaced 180 degrees apart, the first position feedback element can contact any one of the first contact position sensors, and the first position sensing mechanism is located on the right side of the output element.

[0019] The second position sensing mechanism includes two second contact position sensors spaced 180 degrees apart. The second position feedback element can contact any one of the second contact position sensors, and the second position sensing mechanism is located on the left side of the output element.

[0020] The first contact position sensor is mounted upside down on the integrated circuit board using a first fastener, and the second contact position sensor is mounted upright on the integrated circuit board using a second fastener.

[0021] In some preferred embodiments of this utility model, the second position feedback element is sleeved on the output element, and the second position feedback element is located above the integrated circuit board, and the second position feedback element and the output element rotate synchronously.

[0022] The second position feedback element has a first contact protrusion and a second contact protrusion, and the two second contact position sensors are divided into a front second contact position sensor and a rear second contact position sensor.

[0023] The first contact protrusion can contact the front second contact position sensor, but the first contact protrusion cannot contact the rear second contact position sensor.

[0024] The second contact protrusion can contact the rear second contact position sensor, but the second contact protrusion cannot contact the front second contact position sensor.

[0025] In some preferred embodiments of this utility model, the second position feedback element has a center line, and the first contact protrusion and the second contact protrusion are symmetrically distributed on both sides of the center line.

[0026] When the second position feedback device rotates to the foremost position, a front gap is formed between the center line and the front second contact position sensor. The size of the first contact protrusion is larger than the size of the front gap, so that the first contact protrusion contacts the front second contact position sensor.

[0027] When the second position feedback device rotates to the rearmost position, a rear gap is formed between the center line and the rear second contact position sensor. The size of the second contact protrusion is larger than the size of the rear gap, so that the second contact protrusion contacts the rear second contact position sensor.

[0028] The foremost and rearmost positions are 180 degrees apart.

[0029] In some preferred embodiments of this utility model, the first position feedback element is located below the integrated circuit board, and the integrated circuit board has an observation slot located directly above the contact point between the first position feedback element and the first contact position sensor.

[0030] In some preferred embodiments of this utility model, the actuator housing is provided with a track groove, the first position feedback member passes through the track groove from bottom to top and extends out of the actuator housing, and the first position feedback member can move along the track groove.

[0031] In some preferred embodiments of this utility model, a clutch mechanism is further provided between the gear transmission mechanism and the output component, and the gear transmission mechanism and the output component form a separable transmission engagement through the clutch mechanism;

[0032] The gear transmission mechanism includes an input gear, several reduction gears and an output gear, and the clutch mechanism includes an output turntable and a transmission rod;

[0033] The input gear transmission is connected to the output shaft of the drive device;

[0034] The reduction gear transmission is connected between the input gear and the output gear;

[0035] The transmission rod is fixed on the output turntable, the output gear forms a transmission engagement with the output turntable through the transmission rod, and the first position feedback component is fixed on the output gear;

[0036] The output turntable is tightly fitted with the output component to form a transmission engagement, and the output gear is clearance-fitted with the output component.

[0037] In some preferred embodiments of this utility model, the output gear is provided with a clutch groove, the transmission rod extends into the clutch groove, and the size of the clutch groove is larger than the size of the transmission rod;

[0038] When the transmission rod abuts against the side wall of the clutch groove, the transmission rod and the output gear form a transmission engagement.

[0039] When the transmission rod separates from the side wall of the clutch groove, the transmission rod and the output gear form a transmission disengagement engagement.

[0040] The working process of this utility model is as follows:

[0041] 1. Electric Drive and Monitoring Process: When the system issues an electric valve opening / closing command, the drive unit starts, driving the input gear to rotate; the power is transmitted to the output gear through the first reduction gear and the second reduction gear, and the output gear drives the transmission rod to rotate synchronously; the side wall of the transmission rod abuts against the side wall of the clutch groove of the output turntable, pushing the output turntable and output components to rotate, thereby driving the valve to move; the first position feedback component slides along the track groove with the output gear, and when the valve reaches the "fully open" or "fully closed" position, the first position feedback component abuts against the corresponding first position sensing mechanism, the sensor outputs an electrical signal, which is transmitted to the control system to complete the electric position monitoring.

[0042] 2. Manual Drive and Monitoring Process: When manual operation of the valve is required, an external force (such as a wrench) rotates the lower end of the output component; the output component drives the output disc to rotate. Since the clutch groove is 90° arc-shaped and its size is larger than the transmission rod, when the output disc rotates, the side wall of the clutch groove separates from the transmission rod, and the gear transmission mechanism (input gear, reduction gear, output gear) does not move accordingly, resulting in low resistance to manual operation; the second position feedback component rotates synchronously with the output component. When the valve reaches the "fully open" or "fully closed" position, the second position feedback component abuts against the corresponding second position sensing mechanism, and the sensor outputs an electrical signal, which is transmitted to the control system to complete the manual position monitoring.

[0043] The beneficial effects of this utility model are as follows:

[0044] 1. High detection accuracy: By setting up two sets of position sensing mechanisms, the position information of the gear transmission mechanism and the output component are detected respectively, realizing multi-stage position feedback and improving control accuracy;

[0045] II. Compact and reasonable structure: The integrated circuit board is placed externally, optimizing the internal space layout, while the symmetrically distributed sensing structure is adopted to reduce signal interference;

[0046] 3. Easy maintenance: The integrated circuit board is located at the top of the actuator, which is convenient for disassembly, maintenance and replacement. The design of the observation slot makes it easy to check the working status of the sensing mechanism.

[0047] IV. Overload protection: The gear transmission mechanism and the output component can be separated through the clutch mechanism. When the output component is subjected to excessive external force, the transmission rod separates from the output turntable to avoid damage to the internal structure.

[0048] V. High reliability: The installation method of the contact sensor (combination of inverted and upright positions) and the protruding point design of the feedback element ensure the accuracy and stability of position detection. Attached Figure Description

[0049] Figure 1 This is a schematic diagram of the structure of this utility model.

[0050] Figure 2This is a side view of the present invention.

[0051] Figure 3 This is a split diagram of the present invention.

[0052] Figure 4 This is a top view of the present invention.

[0053] Figure 5 This is a structural schematic diagram of the second position feedback component.

[0054] Figure 6 This is a comparative diagram showing the first position feedback component before and after its movement.

[0055] Figure 7 This is a comparative diagram showing the second position feedback component before and after its movement.

[0056] In the diagram: 1. Actuator housing; 11. Mounting cavity; 12. Track groove; 2. Drive unit; 21. Output shaft; 3. Gear transmission mechanism; 31. Input gear; 32. Reduction transmission gear; 33. Output gear; 4. Output component; 5. First position sensing mechanism; 51. First position feedback component; 52. First contact position sensor; 6. Clutch mechanism; 61. Output turntable; 611. Clutch groove; 62. Transmission rod; 7. Integrated circuit board; 71. Observation slot; 8. Second position sensing mechanism; 81. Second position feedback component; 811. First contact protrusion; 812. Second contact protrusion; 81L. Center line; 82. Second contact position sensor; 821. Front second contact position sensor; 8211. Front clearance; 822. Rear second contact position sensor; 8221. Rear clearance. Detailed Implementation

[0057] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments are merely specific descriptions of the present invention, and their purpose is to enable those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limitations on the present invention.

[0058] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0059] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0060] Example 1

[0061] Reference Figures 1 to 7 An actuator with an external integrated circuit board includes: an actuator housing 1 having a mounting cavity 11; a drive device 2 mounted on the actuator housing 1; a gear transmission mechanism 3 disposed within the mounting cavity 11 and forming a transmission engagement with the drive device 2; an output member 4 mounted at the lower end of the actuator housing 1 and forming a transmission engagement with the gear transmission mechanism 3; and a first position sensing mechanism 5 fixed at the upper end of the actuator housing 1. A first position feedback member 51 is provided on the gear transmission mechanism 3. A position feedback element 51 is adapted to the first position sensing mechanism 5; an integrated circuit board 7 is located at the upper end of the first position sensing mechanism 5; a second position sensing mechanism 8 is fixed at the upper end of the integrated circuit board 7; the output element 4 extends upward and extends above the actuator housing 1; a second position feedback element 81 is provided on the output element 4; the second position feedback element 81 is adapted to the second position sensing mechanism 8; the integrated circuit board 7 is electrically connected to the drive device 2, the first position sensing mechanism 5, and the second position sensing mechanism 8.

[0062] The above describes the basic structural design of this utility model, which features dual position monitoring functions. First, there is an electric operation monitoring function, which, through the cooperation of the first position sensing mechanism 5 and the first position feedback component 51, detects the rotational speed / angle of the gear transmission mechanism 3 and provides feedback on the position signal of the gear transmission mechanism 3. Second, there is a manual operation monitoring function, which, through the cooperation of the second position sensing mechanism 8 and the second position feedback component 81, directly detects the final position / displacement of the output component 4 and provides feedback on the position signal of the output component 4.

[0063] It needs to be emphasized that, referring to Figure 2An external integrated circuit board 7 is used, located on the top of the actuator (external type) rather than embedded inside the housing. This eliminates the need to disassemble the entire actuator housing 1 during subsequent maintenance; only the circuit board or sensing mechanism needs to be maintained / replaced, reducing maintenance costs and downtime. Furthermore, the electrical connections between the drive unit 2 and the two sensing mechanisms are centralized on a single circuit board, reducing the interference risk from distributed wiring. Simultaneously, the circuit board can integrate overcurrent protection, overtemperature protection, and fault alarm functions, improving the overall reliability of the actuator.

[0064] There are many options for position sensing mechanisms, such as optical position sensors and Hall effect position sensors. However, since both the first position sensing mechanism 5 and the second position sensing mechanism 8 in this invention are located outside the actuator housing 1, they may be subject to more external interference factors (light, magnetic field), leading to monitoring errors. In the preferred embodiment, refer to... Figures 6-7 The first position sensing mechanism 5 includes two first contact position sensors 52 spaced 180 degrees apart. The first position feedback element 51 can contact either of the first contact position sensors 52, and the first position sensing mechanism 5 is located on the right side of the output element 4. The second position sensing mechanism 8 includes two second contact position sensors 82 spaced 180 degrees apart. The second position feedback element 81 can contact either of the second contact position sensors 82, and the second position sensing mechanism 8 is located on the left side of the output element 4. The first contact position sensors 52 are mounted upside down on the integrated circuit board 7 using first fasteners, and the second contact position sensors 82 are mounted upright on the integrated circuit board 7 using second fasteners. The detection accuracy of contact sensors is easily affected by interference and distance deviation. Furthermore, a left-right separation layout is adopted: this reduces mechanical collisions between the two sets of sensors caused by vibration and avoids "false triggering" during contact feedback; and the inverted / upright installation ensures that the "contact distance" between each sensor and the feedback element is consistent (no excessively close squeezing or excessively far without contact), avoiding position signal lag or signal loss due to detection distance deviation, and ensuring the accuracy of the feedback signal.

[0065] Furthermore, referring to Figure 3 The actuator housing 1 is provided with a track groove 12. The first position feedback element 51 extends out of the actuator housing 1 from bottom to top through the track groove 12, and the first position feedback element 51 can move along the track groove 12. The shape of the track groove 12 strictly limits the movement direction of the first position feedback element 51, ensuring that it can only move along the preset track, and avoiding misalignment between the first position feedback element 51 and the first position sensing mechanism 5 due to gear vibration or assembly deviation.

[0066] Preferably, refer to Figure 3 , Figures 6-7A clutch mechanism 6 is also provided between the gear transmission mechanism 3 and the output component 4, and the gear transmission mechanism 3 and the output component 4 form a separable transmission engagement through the clutch mechanism 6. Specifically, the gear transmission mechanism 3 includes an input gear 31, several reduction transmission gears 32, and an output gear 33. The clutch mechanism 6 includes an output turntable 61 and a transmission rod 62. The input gear 31 is driven to the output shaft 21 of the drive device 2. The reduction transmission gears 32 are driven to the input gear 31 and the output gear 33. The transmission rod 62 is fixed on the output turntable 61. The output gear 33 forms a transmission engagement with the output turntable 61 through the transmission rod 62. The first position feedback component 51 is fixed on the output gear 33. The output turntable 61 and the output component 4 are tightly fitted and form a transmission engagement. The output turntable 61 and the output component 4 are rigidly connected (without relative rotation) through interference fit or other means, and finally the power is transmitted to the output component 4. Furthermore, the output gear 33 and the output component 4 form a clearance fit, and there is no direct transmission relationship between the output gear 33 and the output component 4 (there is a clearance, and no torque is transmitted). Power must be indirectly transmitted through the clutch mechanism 6. Further, the output gear 33 has a clutch groove 611, and the transmission rod 62 extends into the clutch groove 611, with the size of the clutch groove 611 being larger than the size of the transmission rod 62. When the transmission rod 62 abuts against the side wall of the clutch groove 611, the transmission rod 62 and the output gear 33 form a transmission engagement fit; when the transmission rod 62 separates from the side wall of the clutch groove 611, the transmission rod 62 and the output gear 33 form a transmission disengagement fit.

[0067] The core of the clutch mechanism 6 is to switch power transmission on and off by changing the engagement relationship between the transmission rod 62 and the output turntable 61. Here are some applicable scenarios: 1. When the output component 4 encounters abnormal resistance (such as jamming), and the torque exceeds a preset threshold, the output gear 33 continues to rotate with the transmission chain, but power cannot be transmitted to the output turntable 61 through the transmission rod 62. The output component 4 stops moving, and the gear transmission mechanism 3 idles, preventing damage to the drive device 2 and gears due to overload. 2. In the disengaged state, the drive device 2 drives the gear transmission mechanism 3, but the output component 4 is unaffected by power. The position of the output component 4 can be manually adjusted. This is particularly useful when the drive device 2 (usually a motor) or the gear transmission mechanism 3 malfunctions, providing temporary emergency opening, closing, and adjustment of the output component 4.

[0068] Example 2

[0069] Reference Figures 1-3 , Figure 5 , Figure 7In this embodiment, the second position feedback element 81 is sleeved on the output element 4, and the second position feedback element 81 is located above the integrated circuit board 7. The second position feedback element 81 rotates synchronously with the output element 4. The second position feedback element 81 has a first contact protrusion 811 and a second contact protrusion 812. The two second contact position sensors 82 are divided into a front second contact position sensor 82182 and a rear second contact position sensor 82282. The first contact protrusion 811 can contact the front second contact position sensor 82182, but cannot contact the rear second contact position sensor 82282. The second contact protrusion 812 can contact the rear second contact position sensor 82282, but cannot contact the front second contact position sensor 82182.

[0070] The two contact protrusions and the contact position sensor use a one-to-one triggering logic, which avoids the confusion of the two sensors triggering at the same time and ensures that the position determination is unambiguous.

[0071] In some preferred embodiments of this utility model, reference is made to Figure 5 The second position feedback element 81 has a center line 81L, and the first contact protrusion 811 and the second contact protrusion 812 are symmetrically distributed on both sides of the center line 81L. When the second position feedback element 81 rotates to the foremost position, a front gap 8211 is formed between the center line 81L and the front second contact position sensor 82182. The size of the first contact protrusion 811 is larger than the size of the front gap 8211, so that the first contact protrusion 811 contacts the front second contact position sensor 82182. The existence of the front gap 8211 is a guarantee of the reliability of the front contact. Even if there are assembly errors (such as the feedback element installation misalignment) or manufacturing tolerances (such as the gap being slightly larger than the design value), the first contact protrusion 811 can still cover the front gap 8211 and form effective contact with the front sensor, avoiding the risk of failure where the sensor is in position but not triggered. When the second position feedback component 81 rotates to the rearmost position, a rear gap 8221 is formed between the center line 81L and the rear second contact position sensor 82282. The size of the second contact protrusion 812 is larger than the size of the rear gap 8221, so that the second contact protrusion 812 can contact the rear second contact position sensor 82282. The existence of the rear gap 8221 ensures the reliability of the rear contact. Even if there are assembly errors (such as misalignment of the feedback component) or manufacturing tolerances (such as the gap being slightly larger than the design value), the second contact protrusion 812 can still cover the rear gap 8221 and form effective contact with the rear sensor, avoiding the risk of failure due to being in position but not triggered. The 180-degree interval between the foremost and rearmost positions perfectly matches the rotation angle of the output component 4.

[0072] Example 3

[0073] Reference Figure 4 In this embodiment, the first position feedback element 51 is located below the integrated circuit board 7, and the integrated circuit board 7 has an observation slot 71 located directly above the contact point between the first position feedback element 51 and the first contact position sensor 52. The design of the observation slot 71 is based on maintenance considerations, solving the blind spot problem of the contact monitoring system and realizing multiple functions such as rapid fault diagnosis, accurate assembly calibration, and wear-preventive maintenance.

[0074] It is worth noting that the other technical solutions of this utility model are all existing technologies, and therefore will not be described in detail.

[0075] 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 concept 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. An actuator with an external integrated circuit board, comprising: Actuator housing (1) having a mounting cavity (11); A drive unit (2) is mounted on the actuator housing (1); A gear transmission mechanism (3) is configured in the mounting cavity (11) and forms a transmission engagement with the drive device (2); Output component (4) is installed at the lower end of actuator housing (1), and output component (4) forms a transmission engagement with the gear transmission mechanism (3); Its features are, It also includes: The first position sensing mechanism (5) is fixed on the upper end of the actuator housing (1). The gear transmission mechanism (3) is provided with a first position feedback component (51), which is adapted to the first position sensing mechanism (5). An integrated circuit board (7) is located at the upper end of the first position sensing mechanism (5); The second position sensing mechanism (8) is fixed on the upper end of the integrated circuit board (7). The output component (4) extends upward and extends above the actuator housing (1). The output component (4) is provided with a second position feedback component (81), which is adapted to the second position sensing mechanism (8). The integrated circuit board (7) is electrically connected to the drive device (2), the first position sensing mechanism (5), and the second position sensing mechanism (8).

2. The actuator with an external integrated circuit board according to claim 1, characterized in that: The first position sensing mechanism (5) includes two first contact position sensors (52) spaced 180 degrees apart. The first position feedback element (51) can contact any one of the first contact position sensors (52), and the first position sensing mechanism (5) is located on the right side of the output element (4). The second position sensing mechanism (8) includes two second contact position sensors (82) spaced 180 degrees apart. The second position feedback element (81) can contact any one of the second contact position sensors (82), and the second position sensing mechanism (8) is located on the left side of the output element (4). The first contact position sensor (52) is mounted upside down on the integrated circuit board (7) by a first fastener, and the second contact position sensor (82) is mounted upright on the integrated circuit board (7) by a second fastener.

3. The actuator with an external integrated circuit board according to claim 2, characterized in that: The second position feedback element (81) is sleeved on the output element (4), and the second position feedback element (81) is located above the integrated circuit board (7). The second position feedback element (81) and the output element (4) rotate synchronously. The second position feedback element (81) has a first contact protrusion (811) and a second contact protrusion (812), and the two second contact position sensors (82) are divided into a front second contact position sensor (821)(82) and a rear second contact position sensor (822)(82). The first contact protrusion (811) can contact the front second contact position sensor (821)(82), and the first contact protrusion (811) cannot contact the rear second contact position sensor (822)(82). The second contact protrusion (812) can contact the rear second contact position sensor (822)(82), but the second contact protrusion (812) cannot contact the front second contact position sensor (821)(82).

4. The actuator with an external integrated circuit board according to claim 3, characterized in that: The second position feedback element (81) has a center line (81L), and the first contact protrusion (811) and the second contact protrusion (812) are symmetrically distributed on both sides of the center line (81L). When the second position feedback element (81) rotates to the foremost position, a front gap (8211) is formed between the center line (81L) and the front second contact position sensor (821)(82). The size of the first contact protrusion (811) is larger than the size of the front gap (8211) so that the first contact protrusion (811) contacts the front second contact position sensor (821)(82). When the second position feedback element (81) rotates to the last side position, a rear gap (8221) is formed between the center line (81L) and the rear second contact position sensor (822)(82). The size of the second contact protrusion (812) is larger than the size of the rear gap (8221) so that the second contact protrusion (812) contacts the rear second contact position sensor (822)(82). The foremost and rearmost positions are 180 degrees apart.

5. The actuator with an external integrated circuit board according to claim 2, characterized in that: The first position feedback element (51) is located below the integrated circuit board (7), and the integrated circuit board (7) has an observation slot (71) located directly above the contact point between the first position feedback element (51) and the first contact position sensor (52).

6. The actuator with an external integrated circuit board according to claim 2, characterized in that: The actuator housing (1) is provided with a track groove (12). The first position feedback member (51) passes through the track groove (12) from bottom to top and extends out of the actuator housing (1). The first position feedback member (51) can move along the track groove (12).

7. The actuator with an external integrated circuit board according to claim 1, characterized in that: A clutch mechanism (6) is also provided between the gear transmission mechanism (3) and the output component (4), and the gear transmission mechanism (3) and the output component (4) form a separable transmission engagement through the clutch mechanism (6); The gear transmission mechanism (3) includes an input gear (31), several reduction transmission gears (32) and an output gear (33), and the clutch mechanism (6) includes an output turntable (61) and a transmission rod (62); The input gear (31) is connected to the output shaft (21) of the drive device (2); The reduction gear (32) is connected between the input gear (31) and the output gear (33); The transmission rod (62) is fixed on the output turntable (61), and the output gear (33) is connected to the output turntable (61) through the transmission rod (62). The first position feedback element (51) is fixed on the output gear (33). The output turntable (61) is tightly fitted with the output component (4) to form a transmission fit, and the output gear (33) is clearance fitted with the output component (4).

8. The actuator with an external integrated circuit board according to claim 7, characterized in that: The output gear (33) is provided with a clutch groove (611), the transmission rod (62) extends into the clutch groove (611), and the size of the clutch groove (611) is larger than the size of the transmission rod (62); When the transmission rod (62) abuts against the side wall of the clutch groove (611), the transmission rod (62) and the output gear (33) form a transmission engagement. When the transmission rod (62) separates from the side wall of the clutch groove (611), the transmission rod (62) and the output gear (33) form a transmission separation engagement.

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