Voice coil motor magnet pulling force detection device

Abstract

The utility model relates to the field of voice coil motor magnet assembly, and discloses a voice coil motor magnet pulling force detection device, which comprises a cabinet, a conveying line is arranged on the cabinet, and the conveying line is used for conveying a tray on which a long-strip-shaped jig disc, a long-strip-shaped cover plate and a magnet base assembly are placed; a cushion block is arranged on the conveying line, and a jig disc pressing plate is arranged on the cushion block. A jacking seat is arranged on the cabinet; a first linear motor is arranged on the cabinet, a second linear motor is arranged on a mover seat of the first linear motor, a third linear motor is arranged on a mover seat of the second linear motor, a magnetic pulling assembly is arranged on a mover seat of the third linear motor, and the magnetic pulling assembly is used for magnetically attracting a magnet on the base; through the arrangement of the jacking seat and the jig disc pressing plate, the base bonded with the magnet can be accurately positioned, the magnet can be accurately attracted in cooperation with the magnet pulling assembly, pulling force detection is carried out, and the pulling force detection efficiency of the magnet is improved.

Description

Technical Field

[0001] The utility model relates to the field of voice coil motor magnet assembly, in particular to a voice coil motor magnet tension detection device. Background Art

[0002] A voice coil motor is a device that uses the interaction between the magnetic field from a permanent magnet and the magnetic field generated by a powered coil conductor to produce regular motion. It is widely used in mobile phone cameras. However, the structure of a voice coil motor is complex and difficult to assemble. The base is one of the important components of a voice coil motor.

[0003] The bases are arranged at equal intervals on a long jig plate using a loading device, and then the magnets are transferred and bonded to the bases. In order to ensure product quality, it is necessary to detect whether the magnets and the bases are firmly bonded; the existing tensile testing equipment consists of a sturdy frame, a fixture, and a force sensor. By clamping the material to be tested and applying gradually increasing tensile force, the testing machine can measure the mechanical properties of the material. However, the magnets are small, and the bases with magnets are transported on the assembly line. The existing tensile testing equipment cannot carry out the testing operation. Therefore, how to accurately locate the bases with magnets and carry out tensile testing is an urgent problem to be solved. Summary of the invention

[0004] The purpose of the utility model is to provide a voice coil motor magnet tension detection device, which effectively solves the problem of how to accurately locate a base with a magnet adhered thereto and carry out tension detection proposed in the above background technology.

[0005] The technical solution adopted by the utility model is as follows: a voice coil motor magnet tension detection device, including a cabinet, a conveyor line is installed on the cabinet, the number of conveyor lines is two, the two conveyor lines are arranged in parallel, and the conveyor line is used to convey a tray with a long jig plate, a long cover plate and a magnet base assembly; a pad is installed on the conveyor line, and a jig plate pressure plate is installed on the pad, and the shape of the jig plate pressure plate is a rectangular frame. The jig plate pressure plate is used to press the long jig plate and the long cover plate on the tray, and the magnet on the base is located at the opening; the cabinet is installed with There are two lifting seats, which are distributed between the two conveyor lines. The lifting seats can raise or lower the pallet by lifting and lowering. A first linear motor is installed on the cabinet, and the moving direction of the first linear motor is longitudinal. A second linear motor is installed on the mover seat of the first linear motor, and the moving direction of the second linear motor is transverse. A third linear motor is installed on the mover seat of the second linear motor, and the moving direction of the third linear motor is vertical. A pulling magnetic assembly is installed on the mover seat of the third linear motor, and the pulling magnetic assembly is used to magnetically attract the magnet on the base.

[0006] The beneficial effect of the utility model is that: by setting a lifting seat and a fixture disk pressure plate, the application can accurately position the base with the magnet adhered, and can accurately absorb the magnet in conjunction with the magnetic pulling component to carry out tension testing, thereby improving the tension testing efficiency of the magnet. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a schematic diagram of the three-dimensional structure of the base and the magnet.

[0008] Figure 2 It is a schematic diagram of the top view of the long rectangular fixture plate and the long rectangular cover plate on the tray.

[0009] Figure 3 It is a schematic diagram of the three-dimensional structure with the long rectangular fixture plate and the long rectangular cover plate disassembled.

[0010] Figure 4 A schematic diagram of the three-dimensional structure of the cabinet.

[0011] Figure 5 It is a schematic diagram of the three-dimensional structure of the fixture plate.

[0012] Figure 6 It is a schematic diagram of the three-dimensional structure of the first linear motor, the second linear motor, and the third linear motor.

[0013] Figure 7 This is a schematic diagram of the three-dimensional structure of the conveyor line.

[0014] Figure 8 It is a schematic diagram of the three-dimensional structure of the jacking seat.

[0015] Fig. 9 It is a schematic diagram of the three-dimensional structure of the magnetic pulling component.

[0016] Fig.10 It is a schematic diagram of the side cross-sectional structure of the tension head.

[0017] Fig.11 It is a schematic diagram of the three-dimensional structure of the tension head.

[0018] Fig.12 It is a schematic diagram of the three-dimensional structure of the pull seat.

[0019] Fig.13 Schematic diagram of the top view of the first flange.

[0020] Fig.14 It is a schematic diagram of the three-dimensional structure of the second flange.

[0021] Fig.15 It is a schematic diagram of the front cross-sectional structure of the first pin rod.

[0022] Fig.16 It is a schematic diagram of the side structure of the second pin.

[0023] Fig.17 It is a schematic diagram of the main cross-sectional structure of the connection component.

[0024] Fig.18 It is a schematic diagram of the side cross-sectional structure of the airflow channel.

[0025] Fig.19 It is a schematic diagram of the main cross-sectional structure of the airflow channel.

[0026] Fig. 20 It is a schematic diagram of the main cross-sectional structure of the slider and push rod.

[0027] In the figure: 1, magnet; 2, base; 3, long strip fixture plate; 4, long strip cover plate; 5, tray; 6, cabinet; 7, conveyor line; 8, cushion block; 9, fixture plate pressure plate; 10, lifting seat; 11, first linear motor; 12, second linear motor; 13, third linear motor; 14, magnetic pull assembly; 15, support seat; 16, side plate; 17, first pulley; 18, second pulley; 19, belt; 20, connecting rod; 21, first machine base; 22, first motor; 23, first cylinder base; 24, second cylinder base; 25, first cylinder; 26, stopper; 27, U-groove; 28, position sensor; 29, second cylinder; 30, top seat; 31, Pin; 32, first carrier plate; 33, second carrier plate; 34, third carrier plate; 35, mounting hole; 36, infrared photoelectric sensor; 37, connecting assembly; 38, pull seat; 39, strip section; 40, protruding section; 41, accommodating groove; 42, positioning screw; 43, pulling head; 44, bump; 45, through hole; 46, first flange; 47, second flange; 48, first pin rod; 49, first plug hole; 50, second pin rod; 51, T-shaped swivel hole; 52, long bolt; 53, first spring; 54, sliding sleeve; 55, air flow channel; 56, slider; 57, push rod; 58, top plate; 59, groove; 60, limit sleeve; 61, second spring. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be further described in detail below in conjunction with the accompanying drawings. The following description is only used to illustrate the technical solution of the utility model rather than to limit it.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; in addition, the terms "first", "second", "third" and the like are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0030] Embodiment 1, as Figure 1 FIG. 1 is a schematic diagram of a voice coil motor magnet 1 and a base 2 after being assembled. Figure 2-3 As shown, the base 2 with the magnet 1 is clamped by the long jig plate 3 and the long cover plate 4, and the long jig plate 3, the long cover plate 4 and the base 2 with the magnet 1 are integrally located on the tray 5, and the heat-cured magnet 1 base 2 assembly is completed and transported to the tension testing device for tension testing. Figure 4 As shown, a voice coil motor magnet tension detection device is proposed, including a cabinet 6, on which a conveyor line 7 is installed, the number of conveyor lines 7 is two, and the two conveyor lines 7 are arranged in parallel. The conveyor line 7 is used to convey a tray 5 with a long strip fixture plate 3, a long strip cover plate 4 and a magnet 1 base 2 assembly; as shown Figure 5 As shown, a cushion block 8 is installed on the conveyor line 7, and a jig disk pressure plate 9 is installed on the cushion block 8. The shape of the jig disk pressure plate 9 is a rectangular frame. The jig disk pressure plate 9 is used to press the long jig disk 3 and the long cover plate 4 on the tray 5. At this time, the magnet 1 on the base 2 is located at the opening; a lifting seat 10 is installed on the cabinet 6. The number of the lifting seats 10 is 2, which are distributed between the two conveyor lines 7. The lifting seat 10 makes the tray 5 rise or fall by lifting and moving. After rising, the long jig disk 3 and the long cover plate 4 are against the jig disk pressure plate 9. At this time, the tray 5 is separated from the conveyor line 7, and the tension detection operation of the magnet 1 on the base 2 can be carried out. After completing the tension detection of one tray of magnets 1, the lifting seat 10 is lowered, and the tray 5 falls on the conveyor line 7 and is moved out; as shown Figure 6As shown, a first linear motor 11 is installed on the cabinet 6, and the moving direction of the first linear motor 11 is longitudinal. A second linear motor 12 is installed on the mover seat of the first linear motor 11, and the moving direction of the second linear motor 12 is transverse. A third linear motor 13 is installed on the mover seat of the second linear motor 12, and the moving direction of the third linear motor 13 is vertical. A pulling magnetic component 14 is installed on the mover seat of the third linear motor 13, and the pulling magnetic component 14 is used to magnetically attract the magnet 1 on the base 2. If the magnet 1 is separated from the base 2, it is unqualified. If the magnet 1 is not separated from the base 2, it is qualified. In conjunction with the movement of the first linear motor 11, the second linear motor 12 and the third linear motor 13, the 6 rows of bases 2 with magnets 1 on the two conveying lines 7 can be subjected to tension detection; the present application can accurately position the base 2 with magnets 1 by setting a lifting seat 10 and a fixture disk pressure plate 9, and can accurately attract the magnet 1 with the pulling magnetic component 14 to carry out tension detection, thereby improving the tension detection efficiency of the magnet 1.

[0031] like Figure 7 As shown, as an optimization of the first embodiment, the conveyor line 7 includes a support seat 15, the shape of the support seat 15 is an I-shaped, and the number of support seats 15 on a single conveyor line 7 is 4; the upper horizontal section of the support seat 15 is connected to a side plate 16 by a countersunk bolt, the top surface of the side plate 16 is used to install the cushion block 8, and a first pulley 17 is rotatably connected in the gap of the side plate 16; a second pulley 18 is rotatably connected to the gap of the side plate 16, and the second pulley 18 is parallel to the first pulley 17, and a belt 19 is installed on the first pulley 17 and the second pulley 18, and the surface of the belt 19 is higher than the first pulley 17 and the second pulley 18. The surface of the pulley 18 and the belt 19 are used to place the pallet 5 and transport it; a connecting rod 20 is installed between the two side panels 16, and the connecting rod 20 is perpendicular to the side panels 16, so as to limit the spacing between the side panels 16 and improve the stability of the structure; a first machine base 21 is installed on the bottom surface of the side panel 16, and a first motor 22 is installed on the first machine base 21. The first motor 22 is connected to the first pulley 17 through a belt drive. The belt drive can be replaced by a chain drive or a gear drive. The first pulley 17 is driven to rotate by the first motor 22, thereby driving the two belts 19 to rotate synchronously to transport the pallet 5.

[0032] like Figure 8As shown, as an optimization of the first embodiment, the lifting seat 10 includes a first cylinder seat 23 and a second cylinder seat 24. The first cylinder seat 23 is equipped with a first cylinder 25, and a stopper 26 is installed at the piston end of the first cylinder 25; a U-mouth groove 27 is provided on the stopper 26, and a position sensor 28 is installed in the U-mouth groove 27; the stopper 26 is used to limit the position of the pallet 5; a second cylinder 29 is installed on the second cylinder seat 24, and a top seat 30 is installed at the piston end of the second cylinder 29, and the top seat 30 is U-shaped and has a pin 31 on the top seat 30, which is adapted to the pin hole of the pallet 5, and the top seat 30 is used to carry and position the pallet 5, thereby realizing the rising and falling of the pallet 5.

[0033] like Fig. 9 As shown, as an optimization of the first embodiment, the magnetic pull component 14 includes a first carrier plate 32, the first carrier plate 32 is connected to the mover seat of the third linear motor 13 by a countersunk bolt, the first carrier plate 32 is rectangular in shape, and the first carrier plate 32 is arranged vertically downward; the end surface of the first carrier plate 32 is connected to the second carrier plate 33 by a countersunk bolt, the second carrier plate 33 is rectangular in shape, and the second carrier plate 33 is arranged vertically downward, and the bottom surface of the second carrier plate 33 is flush with the bottom surface of the first carrier plate 32; the bottom surface of the second carrier plate 33 is connected to the third carrier plate 34 by a countersunk bolt, and the shape of the third carrier plate 34 is convex The head of the third carrier plate 34 is connected to the second carrier plate 33, and the third carrier plate 34 is arranged horizontally, so that the third carrier plate 34 and the second carrier plate 33 form an inverted L shape, the length of the head of the third carrier plate 34 is less than the length of the second carrier plate 33, and the length of the shoulder of the third carrier plate 34 is greater than the length of the second carrier plate 33; the top surface of the third carrier plate 34 is provided with mounting holes 35 arranged at equal intervals, and the number of mounting holes 35 in this embodiment is 6, and the mounting holes 35 correspond to the positions of the magnets 1 on the tray 5 one by one, and the mounting holes 35 pass through the third carrier plate 34, and an infrared photoelectric sensor 36 is installed in the mounting hole 35; Fig.10 and 11 As shown, the third carrier plate 34 is connected to a pull seat 38 through a connecting component 37. The pull seat 38 is composed of a strip segment 39 and a protruding segment 40. The strip segment 39 is connected to the connecting component 37. The position of the protruding segment 40 corresponds to the position of the magnet 1 on the tray 5. Fig.12As shown, the protruding section 40 is rectangular in shape, and the bottom surface of the protruding section 40 is a plane, which is used to adhere the magnet 1, and the material of the protruding section 40 can be iron; the top surface of the strip section 39 is provided with a receiving groove 41, and the receiving groove 41 corresponds to the protruding section 40 one by one, and a tension head 43 is fixed in the receiving groove 41 by a positioning screw 42, and the tension head 43 is rectangular in shape, and the top surface of the tension head 43 protrudes above the pull seat 38, and the side wall of the tension head 43 has a protrusion 44, and a through hole 45 is provided in the center of the tension head 43, and the upper end of the through hole 45 is connected to the infrared photoelectric sensor 3 6 connection, the through hole 45 passes through the protruding section 40 of the pull seat 38 downward, and the through hole 45 is used for the red light of the infrared photoelectric sensor 36 to pass through. If the magnet 1 is pulled out, the infrared photoelectric sensor 36 will alarm; tension detection process: the lifting seat 10 lifts the tray 5, so that the elongated fixture plate 3 and the elongated cover plate 4 are against the fixture plate pressure plate 9, and then the pulling magnetic component 14 is moved downward, the protruding section 40 of the pull seat 38 is magnetically attracted to the magnet 1, and the pulling magnetic component 14 rises. If the magnet 1 is separated from the base 2, it is unqualified, and if the magnet 1 is not separated from the base 2, it is qualified, thereby realizing the tension detection of the magnet 1.

[0034] like Fig.13 As shown, as an optimization of the first embodiment, the end surface of the second carrier plate 33 has symmetrically arranged first flanges 46, and the gap between the two first flanges 46 matches the side gap of the first carrier plate 32. The installation accuracy of the second carrier plate 33 is improved by providing the first flanges 46; Fig.14 As shown, the bottom surface of the second carrier plate 33 has symmetrically arranged second flanges 47 , and the gap between the two second flanges 47 matches the side gap of the third carrier plate 34 . The second flanges 47 are provided to improve the accuracy of the installation of the third carrier plate 34 .

[0035] like Fig.15 As shown, as an optimization of the first embodiment, a first pin rod 48 is installed on the top surface of the third carrier plate 34, and the number of the first pin rods 48 is 2. A first socket 49 is provided on the bottom surface of the second carrier plate 33, and the first socket 49 is plugged and matched with the first pin rod 48. The accuracy of the installation position of the third carrier plate 34 is improved by setting the first pin rod 48.

[0036] like Fig.16 As shown, as an optimization of the first embodiment, a second pin rod 50 is installed on the top surface of the third carrier plate 34, and the number of the second pin rods 50 is 2. The side walls of the second pin rods 50 are against the end surface of the second carrier plate 33. By setting the second pin rods 50, the position of the third carrier plate 34 is further limited, and it has an anti-loosening effect (if the third carrier plate 34 is pulled for a long time, it will cause the second carrier plate 33 and the third carrier plate 34 to not fit tightly).

[0037] like Fig.17As shown, as an optimization of the first embodiment, a T-shaped rotating hole 51 is provided on the top surface of the third carrier plate 34, and the number of the T-shaped rotating holes 51 is 2, and the two T-shaped rotating holes 51 are symmetrically arranged on both sides of the mounting hole 35; the connecting component 37 includes a long bolt 52, the threaded portion of the long bolt 52 is connected to the strip section 39 of the pull seat 38, and the side wall of the long bolt 52 is sleeved with a first spring 53, and the first spring 53 is elastically connected between the third carrier plate 34 and the pull seat 38, and the side wall of the long bolt 52 is slidably connected with a sliding sleeve 54, and the sliding sleeve 54 is located in the T-shaped rotating hole 51, and the sliding sleeve 54 plays a guiding role. By setting the connecting component 37, the pull seat 38 is slidably connected to the third carrier plate 34. After the tension of the magnet 1 is detected, the first spring 53 resets the pull seat 38, thereby reducing the impact caused by the pull seat 38.

[0038] like Fig.18 and 19 As shown, embodiment 2 is different from embodiment 1 in that, considering that the magnet 1 will stick to the pull seat 38 after being pulled off the base 2, an alarm is used to remind personnel to remove the magnet 1, which affects the continuous detection of the magnet 1. An air flow channel 55 is provided on the side wall of the pull seat 38. The shape of the air flow channel 55 is L-shaped. The horizontal section of the air flow channel 55 is connected to the side wall of the strip section 39. The horizontal section is used to connect the air pump. The vertical section of the air flow channel 55 is connected to the bottom surface of the protruding section 40. A protruding section 40 is provided with at least two air flow channels 55. By setting the air flow channel 55, the magnet 1 adsorbed on the protruding section 40 can be blown off, and the magnet 1 falls into the specified position, so that the tension detection of the magnet 1 can be continuously performed.

[0039] like Fig. 20 As shown, the third embodiment is different from the second embodiment in that, considering that the above-mentioned air blowing method has a great impact on the magnet 1, the magnet 1 falls off quickly, and the magnet 1 is easily damaged, the vertical section of the air flow channel 55 is slidably connected to the slider 56, and the slider 56 is cylindrical in shape; a push rod 57 is installed at the lower end of the slider 56, and the push rod 57 is cylindrical in shape, and a top sheet 58 is installed at the lower end of the push rod 57. The material of the top sheet 58 is plastic, and the shape of the top sheet 58 is a disc. The diameter of the top sheet 58 is the same as the diameter of the air flow channel 55, and the bottom surface of the top sheet 58 is flush with the bottom surface of the protruding section 40; the lower end of the air flow channel 55 is provided with a groove 5 9. The diameter of the groove 59 is larger than the diameter of the air flow channel 55. The groove 59 is threadedly connected with a limiting sleeve 60. The limiting sleeve 60 prevents the slider 56 from slipping off the air flow channel 55. The side wall of the push rod 57 is sleeved with a second spring 61. The second spring 61 is elastically connected between the limiting sleeve 60 and the slider 56. By injecting air into the air flow channel 55, the slider 56 moves downward, the second spring 61 is compressed, and the top plate 58 pushes away the magnet 1 adsorbed on the protruding section 40. The magnet 1 falls into the specified position, and the tension detection of the magnet 1 can be continuously performed. In addition, the impact force of the magnet 1 falling is greatly reduced, the magnet 1 will not be damaged, and can be reused.

[0040] Although the present invention has been described in detail with reference to the aforementioned examples, those skilled in the art can still make and modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A voice coil motor magnet tension detection device, comprising a cabinet (6), characterized in that: A conveyor line (7) is provided on the cabinet (6), and the conveyor line (7) is used to convey a tray (5) on which a long strip jig plate (3), a long strip cover plate (4) and a magnet (1) base (2) assembly are placed; a cushion block (8) is provided on the conveyor line (7), and a jig plate pressure plate (9) is provided on the cushion block (8); a lifting seat (10) is provided on the cabinet (6); a first linear motor (11) is provided on the cabinet (6), a second linear motor (12) is provided on the mover seat of the first linear motor (11), a third linear motor (13) is provided on the mover seat of the second linear motor (12), and a magnetic pull assembly (14) is provided on the mover seat of the third linear motor (13), and the magnetic pull assembly (14) is used to magnetically attract the magnet (1) on the base (2).

2. A voice coil motor magnet tension detection device according to claim 1, characterized in that: The jig plate pressing plate (9) is in the shape of a rectangular frame and is used to press the elongated jig plate (3) and the elongated cover plate (4) on the tray (5). At this time, the magnet (1) on the base (2) is located at the opening.

3. A voice coil motor magnet tension detection device according to claim 1, characterized in that: The magnetic pull assembly (14) comprises a first carrier plate (32); a second carrier plate (33) is provided on the end surface of the first carrier plate (32); a third carrier plate (34) is provided on the bottom surface of the second carrier plate (33); the third carrier plate (34) is in a convex shape, so that the third carrier plate (34) and the second carrier plate (33) form an inverted L shape; a mounting hole (35) is provided on the top surface of the third carrier plate (34); the mounting hole (35) corresponds to the position of the magnet (1) on the tray (5) one by one, and an infrared photoelectric sensor (36) is provided in the mounting hole (35); the third carrier plate (34) is connected to a pull seat (38) through a connecting assembly (37); the pull seat (38) is composed of a strip section (39) and a protruding section (40), and the protruding section ( The position of the protruding section (40) corresponds to the position of the magnet (1) on the tray (5), the protruding section (40) is in a rectangular shape, and the bottom surface of the protruding section (40) is a plane, which is used to adhere the magnet (1); the top surface of the strip section (39) is provided with a receiving groove (41), the receiving groove (41) corresponds to the protruding section (40) one by one, a tension head (43) is fixed in the receiving groove (41) by a positioning screw (42), a through hole (45) is provided at the center of the tension head (43), an upper end of the through hole (45) is connected to the infrared photoelectric sensor (36), the through hole (45) penetrates downwardly through the protruding section (40) of the pull seat (38), and the through hole (45) is used for the red light of the infrared photoelectric sensor (36) to pass through.

4. A voice coil motor magnet tension detection device according to claim 3, characterized in that: The second carrier plate (33) is rectangular in shape, the bottom surface of the second carrier plate (33) is flush with the bottom surface of the first carrier plate (32), the end surface of the second carrier plate (33) has symmetrically arranged first flanges (46), the gap between the two first flanges (46) matches the side gap of the first carrier plate (32); the bottom surface of the second carrier plate (33) has symmetrically arranged second flanges (47), the gap between the two second flanges (47) matches the side gap of the third carrier plate (34).

5. The device for detecting the magnet tension of a voice coil motor according to claim 3, characterized in that: The top surface of the third carrier plate (34) is provided with a first pin rod (48), and the bottom surface of the second carrier plate (33) is provided with a first insertion hole (49), and the first insertion hole (49) is plugged and matched with the first pin rod (48).

6. A tension detection device for a voice coil motor magnet (1) according to claim 5, characterized in that: A second pin rod (50) is provided on the top surface of the third carrier plate (34), and a side wall of the second pin rod (50) abuts against an end surface of the second carrier plate (33).

7. A voice coil motor magnet tension detection device according to claim 3, characterized in that: The top surface of the third carrier plate (34) is provided with a T-shaped rotating hole (51); the connecting assembly (37) comprises a long bolt (52), the threaded portion of the long bolt (52) is connected to the strip section (39) of the pull seat (38), the side wall of the long bolt (52) is sleeved with a first spring (53), the first spring (53) is elastically connected between the third carrier plate (34) and the pull seat (38), the side wall of the long bolt (52) is slidably connected with a sliding sleeve (54), and the sliding sleeve (54) is located in the T-shaped rotating hole (51).

8. The device for detecting the magnet tension of a voice coil motor according to claim 7, characterized in that: The side wall of the pull seat (38) is provided with an air flow channel (55) which is L-shaped. The horizontal section of the air flow channel (55) is connected to the side wall of the strip section (39), and the vertical section of the air flow channel (55) is connected to the bottom surface of the protruding section (40).

9. The device for detecting the magnet tension of a voice coil motor according to claim 8, characterized in that: The vertical section of the airflow channel (55) is slidably connected to the slider (56); a push rod (57) is provided at the lower end of the slider (56); a top plate (58) is provided at the lower end of the push rod (57); the bottom surface of the top plate (58) is flush with the bottom surface of the protruding section (40); a groove (59) is opened at the lower end of the airflow channel (55); the diameter of the groove (59) is larger than the diameter of the airflow channel (55); a limit sleeve (60) is threadedly connected to the groove (59); a second spring (61) is sleeved on the side wall of the push rod (57); the second spring (61) is located between the limit sleeve (60) and the slider (56) in an elastically connected manner.

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