Fine adjustment mechanism, fine adjustment device and PCB testing device

Abstract

The utility model belongs to the technical field of PCB testing, and relates to a fine tuning mechanism, a fine tuning device and a PCB testing device. The fine adjustment mechanism comprises a base, a driving part, a first linkage seat, a second linkage seat and a rotating seat, the driving part is installed on the base, the first linkage seat is slidably connected to the base in the first direction, and the driving part is used for driving the first linkage seat to slide relative to the base in the first direction; the second linkage seat is slidably connected to the first linkage seat along a second direction, the rotating seat is rotatably connected to the second linkage seat around a preset rotating axis, the rotating seat is used for being connected with a floating layer of a test fixture, and the preset rotating axis extends along a third direction; the first direction, the second direction and the third direction are not parallel in pairs and are not collinear. The fine tuning mechanism can realize fine tuning of the floating layer of the test fixture, and can avoid damage to the floating layer.

Description

Technical Field

[0001] The utility model belongs to the technical field of PCB board testing systems, and particularly relates to a fine-tuning mechanism, a fine-tuning device and a PCB board testing device. Background Art

[0002] The PCB tester tests the PCB by detecting the circuit formed by the contact between the test pin and the test pad. When testing, the arrangement position of the test pin on the test fixture is converted according to the production data of the PCB. During the production process of the PCB, due to the control problem of the production process, there is often a deviation between the drilling and the printed circuit. According to the provisions of the IPC (International Electronics Industry Association, formerly known as the Institute of Printed Circuits, IPC for short) standard, it is allowed to have a deviation between the drilling and the printed circuit within a certain range. However, when conducting / insulating tests on this type of PCB, there will be a deviation between the test pin of the test fixture and the test point of the PCB to be tested, which will cause the PCB to fail to be tested normally, and it is easy to have a false open circuit / short circuit, and the test result may be distorted, and it is easy to test a normal PCB as a waste PCB. Utility Model Content

[0003] The technical problem to be solved by the utility model is: to provide a fine-tuning mechanism, a fine-tuning device and a PCB board testing device in view of the technical problem that a deviation may occur between a test pin of an existing test fixture and a test point of a PCB board to be tested.

[0004] In order to solve the above technical problems, the embodiment of the utility model provides a fine-tuning mechanism, including a base, a driving component, a first linkage seat, a second linkage seat and a rotating seat, wherein the driving component is installed on the base, the first linkage seat is slidably connected to the base along a first direction, and the driving component is used to drive the first linkage seat to slide relative to the base along the first direction;

[0005] The second linkage seat is slidably connected to the first linkage seat along a second direction, the rotating seat is rotatably connected to the second linkage seat around a preset rotation axis, and the rotating seat is used to connect to the floating layer of the test fixture;

[0006] The preset rotation axis extends along a third direction, and the first direction, the second direction and the third direction are not parallel or collinear with each other.

[0007] According to the fine-tuning mechanism of the embodiment of the utility model, the base, the first linkage base, the second linkage base and the rotating base are connected in sequence, and the rotating base can be connected to the floating layer of the test fixture, so that the first linkage base and the base are slid together to adjust the position of the second linkage base and the rotating base along the first direction. Since the second linkage base and the first linkage base are slid together, and the rotating base and the second linkage base are rotatably matched, when the first linkage base and the base are slid together and the center position of the floating layer of the test fixture remains unchanged, the position of the second linkage base relative to the first linkage base and the rotation angle of the rotating base relative to the second linkage base can be adaptively and automatically adjusted to avoid rigid connection and damage to the test fixture. The fine-tuning mechanism can achieve fine-tuning of the floating layer of the test fixture and avoid damage to the floating layer.

[0008] Optionally, the driving component includes a driving motor and a lead screw, the lead screw includes a lead rod and a nut, and the nut is mounted on the first linkage seat and is threadedly connected to the lead rod;

[0009] The nut is in limited rotation cooperation with the base; and / or the first linkage seat is in limited rotation cooperation with the base;

[0010] The driving motor is mounted on the base, and is used to drive the screw to rotate, so as to drive the nut to move along the axial direction of the screw, thereby driving the first linkage seat to move along the axial direction of the screw;

[0011] The axial direction of the screw rod is parallel to the first direction.

[0012] Optionally, the fine-tuning mechanism further includes a screw rod mounting seat, the screw rod mounting seat is mounted on the base, the screw rod is rotatably connected to the screw rod mounting seat, and the screw rod mounting seat is used to support the screw rod.

[0013] Optionally, a rotating bearing is provided between the rotating seat and the second linkage seat, an outer ring of the rotating bearing is connected to the rotating seat, and an inner ring of the rotating bearing is connected to the second linkage seat.

[0014] Optionally, the fine-tuning mechanism further includes a first slide rail and a first slider, the first slide rail is mounted on the base along the first direction, and the first slider is slidably connected to the first slide rail and connected to the first linkage seat;

[0015] The fine-tuning mechanism further includes a second slide rail and a second slider, wherein the second slide rail is mounted on the first linkage seat along the second direction, and the second slider is slidably connected to the second slide rail and connected to the second linkage seat.

[0016] Optionally, a fixture mounting block is provided on the rotating seat, and two first connection holes are provided on the fixture mounting block and are spaced apart from each other. The two first connection holes are used to connect with the floating layer of the test fixture.

[0017] Optionally, the fine-tuning mechanism further includes a sensing member and a sensor, wherein the sensor is mounted on the base, a sensing space is provided on the sensor, and the sensing member is mounted on the first linkage seat;

[0018] The first linkage seat can drive the sensing element to move back and forth along the first direction, so that the sensing element can approach or move away from the sensing space.

[0019] On the other hand, an embodiment of the utility model provides a fine-tuning device, which includes a base plate and four of the above-mentioned fine-tuning mechanisms, wherein the four fine-tuning mechanisms are respectively a first fine-tuning mechanism, a second fine-tuning mechanism, a third fine-tuning mechanism and a fourth fine-tuning mechanism, wherein the first fine-tuning mechanism, the second fine-tuning mechanism, the third fine-tuning mechanism and the fourth fine-tuning mechanism are sequentially installed on the base plate along the edge of the base plate; the first fine-tuning mechanism and the third fine-tuning mechanism are spaced apart along a first straight line direction, and the second fine-tuning mechanism and the fourth fine-tuning mechanism are spaced apart along a second straight line direction;

[0020] The first straight line direction intersects with the second straight line direction;

[0021] The movement direction of the first linkage seat of the first fine-tuning mechanism and the movement direction of the first linkage seat of the third fine-tuning mechanism are parallel to the second straight line direction;

[0022] The movement direction of the first linkage seat of the second fine-tuning mechanism and the movement direction of the first linkage seat of the fourth fine-tuning mechanism are parallel to the first straight line direction.

[0023] According to the fine-tuning device of the embodiment of the utility model, its fine-tuning mechanism connects the base, the first linkage seat, the second linkage seat and the rotating seat in sequence, and enables the rotating seat to be connected to the floating layer of the test fixture, so that the first linkage seat and the base slide in cooperation, and the position of the second linkage seat and the rotating seat along the first direction is adjusted. Since the second linkage seat and the first linkage seat slide in cooperation, and the rotating seat and the second linkage seat rotate in cooperation, when the first linkage seat and the base slide in cooperation, and the center position of the floating layer of the test fixture remains unchanged, the position of the second linkage seat relative to the first linkage seat and the rotation angle of the rotating seat relative to the second linkage seat can be adaptively and automatically adjusted, so as to avoid rigid connection and damage to the test fixture. Its fine-tuning device can realize the fine adjustment of the floating layer of the test fixture, and can avoid damage to the floating layer.

[0024] Optionally, the bottom plate is a rectangular bottom plate, and the bottom plate has four edges connected end to end; the first fine-tuning mechanism, the second fine-tuning mechanism, the third fine-tuning mechanism and the fourth fine-tuning mechanism are sequentially connected to the four edges of the bottom plate;

[0025] The driving component of the first fine-tuning mechanism is located on the side of the first linkage seat of the first fine-tuning mechanism facing the second straight line direction;

[0026] The driving component of the third fine-tuning mechanism is located on the side of the first linkage seat of the third fine-tuning mechanism that is opposite to the second straight line direction;

[0027] The driving component of the second fine-tuning mechanism is located on the side of the first linkage seat of the second fine-tuning mechanism facing the first straight line direction;

[0028] The driving component of the fourth fine-tuning mechanism is located on a side of the fourth fine-tuning mechanism that is opposite to the first straight line direction of the first linkage seat.

[0029] Optionally, the four edges of the bottom plate include a first edge, a second edge, a third edge and a fourth edge connected end to end in sequence;

[0030] The first fine-adjustment mechanism is connected to the first edge, the second fine-adjustment mechanism is connected to the second edge, the third fine-adjustment mechanism is connected to the third edge, and the fourth fine-adjustment mechanism is connected to the fourth edge;

[0031] The rotating seat of the first fine-tuning mechanism is located in the middle of the first edge, the rotating seat of the second fine-tuning mechanism is located in the middle of the second edge, the rotating seat of the third fine-tuning mechanism is located in the middle of the third edge, and the rotating seat of the fourth fine-tuning mechanism is located in the middle of the fourth edge.

[0032] Optionally, the first direction is a length direction of the base, the second direction is a width direction of the base, and the third direction is a height direction of the base;

[0033] The first straight line direction is the length direction of the bottom plate, and the second straight line direction is the width direction of the bottom plate.

[0034] On the other hand, the embodiment of the utility model provides a PCB board testing device, characterized in that it includes a test fixture and the above-mentioned fine-tuning device, the test fixture includes an interlayer, a floating layer and a test needle, the interlayer is installed on the bottom plate, the floating layer can be floated on the interlayer, the test needle is installed on the floating layer, and the test needle is used to be electrically connected to the PCB board;

[0035] The rotating seats of the fine-tuning mechanisms are respectively connected to the floating layers.

[0036] Optionally, the floating layer is provided with four notches at its edge, a connection block is installed at each notch, the connection block is provided with two second connection holes spaced apart from each other, and the two second connection holes are used to connect with the rotating seat;

[0037] The rotating seats of the four fine-tuning mechanisms are connected to the four connecting blocks in a one-to-one correspondence.

[0038] According to the PCB board test device of the embodiment of the utility model, its fine adjustment mechanism connects the base, the first linkage seat, the second linkage seat and the rotating seat in sequence, and enables the rotating seat to be connected to the floating layer of the test fixture, so that the first linkage seat and the base are slid together to adjust the position of the second linkage seat and the rotating seat along the first direction. Since the second linkage seat and the first linkage seat are slid together, and the rotating seat and the second linkage seat are rotatably matched, when the first linkage seat and the base are slid together and the center position of the floating layer of the test fixture remains unchanged, the position of the second linkage seat relative to the first linkage seat and the rotation angle of the rotating seat relative to the second linkage seat can be adaptively and automatically adjusted to avoid rigid connection and damage to the test fixture. The PCB board test device can realize the fine adjustment of the floating layer of the test fixture and avoid damage to the floating layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of a PCB board testing device provided by an embodiment of the utility model;

[0040] Figure 2 is a schematic diagram of the test fixture;

[0041] Figure 3 It is a schematic diagram of the fine-tuning mechanism.

[0042] The reference numerals in the specification are as follows:

[0043] 1. test fixture; 11. interlayer; 12. floating layer; 121. notch; 13. test pin; 14. connection block; 141. second connection hole;

[0044] 2. bottom plate; 21. first edge; 22. second edge; 23. third edge; 24. fourth edge;

[0045] 3. Fine adjustment mechanism; 31. Base; 32. Driving component; 321. Driving motor; 322. Lead screw; 3221. Lead screw; 3222. Nut; 33. First linkage seat; 34. Second linkage seat; 35. Rotating seat; 36. First slide rail; 37. First slider; 38. Second slide rail; 39. Second slider; 310. Fixture mounting block; 3101. First connecting hole; 311. Lead screw mounting seat; 312. Induction member; 313. Sensor; 314. Coupling;

[0046] 3a, first fine-tuning mechanism; 3b, second fine-tuning mechanism; 3c, third fine-tuning mechanism; 3d, fourth fine-tuning mechanism;

[0047] x, first direction; y, second direction; z, third direction; X, first straight line direction; Y, second straight line direction. DETAILED DESCRIPTION

[0048] In order to make the technical problems, technical solutions and beneficial effects solved by the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0049] like Figures 1 to 3 As shown, the PCB board testing device provided by the embodiment of the utility model includes a test fixture 1 and a fine-tuning device, the test fixture 1 includes an interlayer 11, a floating layer 12 and a test needle 13, the fine-tuning device includes a base plate 2 and four fine-tuning mechanisms 3, the interlayer 11 is installed on the base plate 2, the floating layer 12 can be floated on the interlayer 11, the test needle 13 is installed on the floating layer 12, the test needle 13 is used to be electrically connected to the PCB board, and the rotating seat 35 of each fine-tuning mechanism 3 is respectively connected to the floating layer 12.

[0050] Four fine-adjustment mechanisms 3 are sequentially installed on the base plate 2 along the edge of the base plate 2 .

[0051] like Figure 3 As shown, the fine-tuning mechanism 3 includes a base 31, a driving component 32, a first linkage seat 33, a second linkage seat 34 and a rotating seat 35. The driving component 32 is installed on the base 31, and the first linkage seat 33 is slidably connected to the base 31 along the first direction x. The driving component 32 is used to drive the first linkage seat 33 to slide relative to the base 31 along the first direction x.

[0052] The second linkage seat 34 is slidably connected to the first linkage seat 33 along the second direction y. The rotating seat 35 is rotatably connected to the second linkage seat 34 around a preset rotation axis. The rotating seat 35 is used to connect with the floating layer 12 of the test fixture 1 .

[0053] The preset rotation axis extends along the third direction z, and the first direction x, the second direction y and the third direction z are not parallel to each other and are not collinear.

[0054] The movement directions of the first linkage seats 33 of two adjacent fine-tuning mechanisms 3 are perpendicular, and the preset rotation axes of the rotating seats 35 of each fine-tuning mechanism 3 are parallel to each other.

[0055] The PCB board testing device provided by the embodiment of the utility model has a fine adjustment mechanism 3 that sequentially connects the base 31, the first linkage seat 33, the second linkage seat 34 and the rotating seat 35, and enables the rotating seat 35 to be connected to the floating layer 12 of the test fixture 1, so that the first linkage seat 33 and the base 31 cooperate and slide, and the position of the second linkage seat 34 and the rotating seat 35 along the first direction x is adjusted. Since the second linkage seat 34 and the first linkage seat 33 cooperate and slide, and the rotating seat 35 and the second linkage seat 34 cooperate in rotation, when the first linkage seat 33 and the base 31 cooperate and slide, and the center position of the floating layer 12 of the test fixture 1 remains unchanged, the position of the second linkage seat 34 relative to the first linkage seat 33 and the rotation angle of the rotating seat 35 relative to the second linkage seat 34 can be adaptively and automatically adjusted, so as to avoid rigid connection and damage to the test fixture 1. The fine adjustment mechanism 3 can realize the fine adjustment of the floating layer 12 of the test fixture 1, and can avoid damage to the floating layer 12.

[0056] In one embodiment, if Figure 2 As shown, four notches 121 are arranged at the edge of the floating layer 12 , and a connecting block 14 is installed at each notch 121 .

[0057] The rotating seats 35 of the four fine-tuning mechanisms 3 are connected to the four connecting blocks 14 in a one-to-one correspondence to realize the connection between the test fixture 1 and the fine-tuning device. At the same time, the fine-tuning of the test fixture 1 is realized through the cooperation of the four fine-tuning mechanisms 3.

[0058] In one embodiment, if Figure 3 As shown, each rotating seat 35 is provided with a fixture mounting block 310, and each fixture mounting block 310 is connected to each connecting block 14 one by one, so that the rotating seats 35 of the four fine-tuning mechanisms 3 are connected to the four connecting blocks 14 one by one, thereby realizing the connection between each rotating seat 35 and the floating layer 12 of the PCB test fixture 1.

[0059] In one embodiment, if Figure 2 and Figure 3As shown, each fixture mounting block 310 is provided with two first connection holes 3101 arranged at intervals, and the two first connection holes 3101 are used to connect with the floating layer 12 of the test fixture 1. Each connection block 14 is provided with two second connection holes 141 arranged at intervals, and the two second connection holes 141 are used to connect with the rotating seat 35; the rotating seats 35 of the four fine-tuning mechanisms 3 are connected to the four connection blocks 14 in a one-to-one correspondence. The two second connection holes 141 can be matched and connected with the two first connection holes 3101 on the corresponding fixture mounting block 310, so as to realize the one-to-one corresponding connection between each fixture mounting block 310 and each connection block 14.

[0060] In one embodiment, if Figure 3 As shown, the first direction x is the length direction of the base 31 , the second direction y is the width direction of the base 31 , and the third direction z is the height direction of the base 31 . The first direction x, the second direction y and the third direction z are perpendicular to each other.

[0061] In one embodiment, if Figure 3 As shown, the driving component 32 includes a driving motor 321 and a screw 322, the screw 322 includes a screw rod 3221 and a nut 3222, the nut 3222 is installed on the first linkage seat 33 and is threadedly connected to the screw rod 3221, and the nut 3222 is matched with the base 31 to limit rotation; and / or, the first linkage seat 33 is matched with the base 31 to limit rotation to ensure that the first linkage seat 33 can only slide relative to the base 31.

[0062] The driving motor 321 is mounted on the base 31 , and is used to drive the screw rod 3221 to rotate, so as to drive the nut 3222 to move axially along the screw rod 3221 , and further drive the first linkage seat 33 to move axially along the screw rod 3221 along with the nut 3222 .

[0063] The axial direction of the screw rod 3221 is parallel to the first direction x, so as to realize the movement of the first linkage seat 33 along the first direction x.

[0064] In an embodiment not shown in the figure, the nut and the base can also be matched to limit rotation to ensure that the first linkage seat can only slide relative to the base.

[0065] In an embodiment not shown in the figure, the screw can also include a screw rod, a nut and a plurality of balls. The nut is sleeved on the screw rod and connected to the first linkage seat. A raceway is formed between the nut and the screw rod. The plurality of balls are arranged in sequence in the raceway to form a corresponding screw structure.

[0066] In an embodiment not shown in the figure, the driving component may also only include a driving motor and a screw rod, the first linkage seat is threadedly connected to the screw rod, and the first linkage seat and the base are limited in rotation to ensure that the first linkage seat can only slide relative to the base. The driving motor is installed on the base, and the driving motor is used to drive the screw rod to rotate, so as to drive the first linkage seat to move along the axial direction of the screw rod.

[0067] The axial direction of the screw rod is parallel to the first direction, so as to realize the movement of the first linkage seat along the first direction.

[0068] In one embodiment, if Figure 3 As shown, the fine-tuning mechanism 3 also includes a screw mounting seat 311, which is mounted on the base 31, and the screw 3221 is rotatably connected to the screw mounting seat 311. The screw mounting seat 311 is used to support the screw 3221 to ensure the driving of the first linkage seat 33 along the first direction x.

[0069] In one embodiment, a screw bearing may be provided between the screw mounting seat 311 and the screw 3221 , the outer ring of the screw bearing is connected to the screw mounting seat 311 , and the inner ring of the screw bearing is connected to the screw 3221 to ensure the rotational connection between the screw mounting seat 311 and the screw 3221 .

[0070] In one embodiment, if Figure 3 As shown, the fine-tuning mechanism 3 further includes a coupling 314 , which is connected between the output shaft of the driving motor 321 and the screw rod 3221 to realize the rotational driving of the screw rod 3221 by the driving motor 321 .

[0071] In one embodiment, if Figure 3 As shown, a rotating bearing is arranged between the rotating seat 35 and the second linkage seat 34 , the outer ring of the rotating bearing is connected to the rotating seat 35 , and the inner ring of the rotating bearing is connected to the second linkage seat 34 to ensure the rotating connection between the rotating seat 35 and the second linkage seat 34 .

[0072] In one embodiment, if Figure 3 As shown, the fine-tuning mechanism 3 also includes a first slide rail 36 and a first slider 37. The first slide rail 36 is installed on the base 31 along the first direction x. The first slider 37 is slidably connected to the first slide rail 36 and connected to the first linkage seat 33 to achieve a sliding connection between the first linkage seat 33 and the base 31.

[0073] In one embodiment, if Figure 3 As shown, the fine-tuning mechanism 3 also includes a second slide rail 38 and a second slider 39. The second slide rail 38 is installed on the first linkage seat 33 along the second direction y. The second slider 39 is slidably connected to the second slide rail 38 and connected to the second linkage seat 34, thereby realizing a sliding connection between the second linkage seat 34 and the first linkage seat 33.

[0074] In one embodiment, if Figure 3 As shown, the fine-tuning mechanism 3 also includes a sensing member 312 and a sensor 313. The sensor 313 is mounted on the base 31. The sensor 313 is provided with a sensing space. The sensing member 312 is mounted on the first linkage seat 33. The first linkage seat 33 can drive the sensing member 312 to move back and forth along the first direction x, so that the sensing member 312 can approach or move away from the sensing space. When the sensing member 312 approaches the sensing space of the sensor 313, the first linkage seat 33 returns to the calibrated origin position.

[0075] In one embodiment, if Figure 1 As shown, the four fine-tuning mechanisms 3 are respectively a first fine-tuning mechanism 3a, a second fine-tuning mechanism 3b, a third fine-tuning mechanism 3c and a fourth fine-tuning mechanism 3d, which are sequentially mounted on the bottom plate 2 along the edge of the bottom plate 2, the first fine-tuning mechanism 3a and the third fine-tuning mechanism 3c are arranged at intervals along the first straight line direction X, and the second fine-tuning mechanism 3b and the fourth fine-tuning mechanism 3d are arranged at intervals along the second straight line direction Y. The first straight line direction X intersects with the second straight line direction Y.

[0076] The movement direction of the first linkage seat 33 of the first fine-tuning mechanism 3a and the movement direction of the first linkage seat 33 of the third fine-tuning mechanism 3c are parallel to the second straight line direction Y.

[0077] The movement direction of the first linkage seat 33 of the second fine-tuning mechanism 3 b and the movement direction of the first linkage seat 33 of the fourth fine-tuning mechanism 3 d are parallel to the first straight line direction X.

[0078] In one embodiment, if Figure 1 As shown, the bottom plate 2 is a rectangular bottom plate, the bottom plate 2 has four edges connected end to end, the first straight line direction X is the length direction of the bottom plate 2, the second straight line direction Y is the width direction of the bottom plate 2, and the first straight line direction X is perpendicular to the second straight line direction Y.

[0079] In one embodiment, if Figure 1 As shown, the first fine-adjustment mechanism 3a, the second fine-adjustment mechanism 3b, the third fine-adjustment mechanism 3c and the fourth fine-adjustment mechanism 3d are connected to the four edges of the base plate 2 in sequence.

[0080] The driving component 32 of the first fine-tuning mechanism 3a is located on the side of the first linkage seat 33 of the first fine-tuning mechanism 3a facing the second straight line direction Y, the driving component 32 of the third fine-tuning mechanism 3c is located on the side of the first linkage seat 33 of the third fine-tuning mechanism 3c facing the opposite side of the second straight line direction Y, the driving component 32 of the second fine-tuning mechanism 3b is located on the side of the first linkage seat 33 of the second fine-tuning mechanism 3b facing the first straight line direction X, and the driving component 32 of the fourth fine-tuning mechanism 3d is located on the side of the first linkage seat 33 of the fourth fine-tuning mechanism 3d facing the opposite side of the first straight line direction X, thereby forming a fine-tuning device.

[0081] When the movement direction of the first linkage seat 33 of the first fine-tuning mechanism 3a is opposite to the movement direction of the first linkage seat 33 of the third fine-tuning mechanism 3c, and the second fine-tuning mechanism 3b and the fourth fine-tuning mechanism 3d are not working, the floating layer 12 can be driven to move along the second straight line direction Y. When the movement direction of the first linkage seat 33 of the second fine-tuning mechanism 3b is opposite to the movement direction of the first linkage seat 33 of the fourth fine-tuning mechanism 3d, and the first fine-tuning mechanism 3a and the third fine-tuning mechanism 3c are not working, the floating layer 12 can be driven to move along the first straight line direction X.

[0082] When the movement direction of the first linkage seat 33 of the first fine-tuning mechanism 3a is opposite to the movement direction of the first linkage seat 33 of the third fine-tuning mechanism 3c, and the movement direction of the first linkage seat 33 of the second fine-tuning mechanism 3b is opposite to the movement direction of the first linkage seat 33 of the fourth fine-tuning mechanism 3d, if the first linkage seat 33 of the first fine-tuning mechanism 3a moves along the second linear direction Y, the first linkage seat 33 of the third fine-tuning mechanism 3c moves in the reverse direction of the second linear direction Y, the first linkage seat 33 of the second fine-tuning mechanism 3b moves along the first linear direction X, and the first linkage seat 33 of the fourth fine-tuning mechanism 3d moves in the reverse direction of the first linear direction X, the floating layer 12 can be driven to rotate counterclockwise; if the first linkage seat 33 of the first fine-tuning mechanism 3a moves in the reverse direction of the second linear direction Y, the first linkage seat 33 of the third fine-tuning mechanism 3c moves in the second linear direction Y, the first linkage seat 33 of the second fine-tuning mechanism 3b moves in the reverse direction of the first linear direction X, and the first linkage seat 33 of the fourth fine-tuning mechanism 3d moves in the first linear direction X, the floating layer 12 can be driven to rotate clockwise.

[0083] In one embodiment, if Figure 1 As shown, the four edges of the bottom plate 2 include a first edge 21, a second edge 22, a third edge 23 and a fourth edge 24 which are connected end to end in sequence.

[0084] The first fine-adjusting mechanism 3 a is connected to the first edge 21 , the second fine-adjusting mechanism 3 b is connected to the second edge 22 , the third fine-adjusting mechanism 3 c is connected to the third edge 23 , and the fourth fine-adjusting mechanism 3 d is connected to the fourth edge 24 .

[0085] The rotating seat 35 of the first fine-tuning mechanism 3a is located in the middle of the first edge 21, the rotating seat 35 of the second fine-tuning mechanism 3b is located in the middle of the second edge 22, the rotating seat 35 of the third fine-tuning mechanism 3c is located in the middle of the third edge 23, and the rotating seat 35 of the fourth fine-tuning mechanism 3d is located in the middle of the fourth edge 24, forming a fine-tuning device.

[0086] The rotating seat 35 and above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fine-tuning mechanism, characterized in that: It comprises a base, a driving component, a first linkage seat, a second linkage seat and a rotating seat, wherein the driving component is mounted on the base, the first linkage seat is slidably connected to the base along a first direction, and the driving component is used to drive the first linkage seat to slide relative to the base along the first direction; The second linkage seat is slidably connected to the first linkage seat along a second direction, the rotating seat is rotatably connected to the second linkage seat around a preset rotation axis, and the rotating seat is used to connect to the floating layer of the test fixture; The preset rotation axis extends along a third direction, and the first direction, the second direction and the third direction are not parallel or collinear with each other.

2. The fine adjustment mechanism according to claim 1, characterized in that: The driving component includes a driving motor and a lead screw, the lead screw includes a lead rod and a nut, the nut is installed on the first linkage seat and is threadedly connected to the lead rod; The nut is in limited rotation cooperation with the base; and / or the first linkage seat is in limited rotation cooperation with the base; The driving motor is mounted on the base, and is used to drive the screw to rotate, so as to drive the nut to move along the axial direction of the screw, thereby driving the first linkage seat to move along the axial direction of the screw; The axial direction of the screw rod is parallel to the first direction.

3. The fine adjustment mechanism according to claim 2, characterized in that: The fine-tuning mechanism also includes a screw rod mounting seat, which is mounted on the base. The screw rod is rotatably connected to the screw rod mounting seat, and the screw rod mounting seat is used to support the screw rod.

4. The fine adjustment mechanism according to claim 1, characterized in that: A rotating bearing is arranged between the rotating seat and the second linkage seat, the outer ring of the rotating bearing is connected to the rotating seat, and the inner ring of the rotating bearing is connected to the second linkage seat.

5. The fine adjustment mechanism according to claim 1, characterized in that: The fine-tuning mechanism further includes a first slide rail and a first slider, wherein the first slide rail is mounted on the base along the first direction, and the first slider is slidably connected to the first slide rail and connected to the first linkage seat; The fine-tuning mechanism further includes a second slide rail and a second slider, wherein the second slide rail is mounted on the first linkage seat along the second direction, and the second slider is slidably connected to the second slide rail and connected to the second linkage seat.

6. The fine adjustment mechanism according to claim 1, characterized in that: A fixture mounting block is arranged on the rotating seat, and two first connection holes arranged at intervals are arranged on the fixture mounting block. The two first connection holes are used to connect with the floating layer of the test fixture.

7. The fine adjustment mechanism according to claim 1, characterized in that: The fine-tuning mechanism further comprises a sensing element and a sensor, wherein the sensor is mounted on the base, a sensing space is provided on the sensor, and the sensing element is mounted on the first linkage seat; The first linkage seat can drive the sensing element to move back and forth along the first direction, so that the sensing element can approach or move away from the sensing space.

8. A fine-tuning device, characterized in that: The invention comprises a bottom plate and four fine-adjustment mechanisms according to any one of claims 1 to 7, wherein the four fine-adjustment mechanisms are respectively a first fine-adjustment mechanism, a second fine-adjustment mechanism, a third fine-adjustment mechanism and a fourth fine-adjustment mechanism, wherein the first fine-adjustment mechanism, the second fine-adjustment mechanism, the third fine-adjustment mechanism and the fourth fine-adjustment mechanism are sequentially mounted on the bottom plate along the edge of the bottom plate; the first fine-adjustment mechanism and the third fine-adjustment mechanism are spaced apart along a first straight line direction, and the second fine-adjustment mechanism and the fourth fine-adjustment mechanism are spaced apart along a second straight line direction; The first straight line direction intersects with the second straight line direction; The movement direction of the first linkage seat of the first fine-tuning mechanism and the movement direction of the first linkage seat of the third fine-tuning mechanism are parallel to the second straight line direction; The movement direction of the first linkage seat of the second fine-tuning mechanism and the movement direction of the first linkage seat of the fourth fine-tuning mechanism are parallel to the first straight line direction.

9. The fine-tuning device according to claim 8, characterized in that: The bottom plate is a rectangular bottom plate, and the bottom plate has four edges connected end to end; the first fine-tuning mechanism, the second fine-tuning mechanism, the third fine-tuning mechanism and the fourth fine-tuning mechanism are connected to the four edges of the bottom plate in sequence; The driving component of the first fine-tuning mechanism is located on the side of the first linkage seat of the first fine-tuning mechanism facing the second straight line direction; The driving component of the third fine-tuning mechanism is located on the side of the first linkage seat of the third fine-tuning mechanism that is opposite to the second straight line direction; The driving component of the second fine-tuning mechanism is located on the side of the first linkage seat of the second fine-tuning mechanism facing the first straight line direction; The driving component of the fourth fine-adjusting mechanism is located on the side of the fourth fine-adjusting mechanism opposite to the first straight line direction of the first linkage seat.

10. The fine-tuning device according to claim 9, characterized in that: The four edges of the bottom plate include a first edge, a second edge, a third edge and a fourth edge connected end to end in sequence; The first fine-adjustment mechanism is connected to the first edge, the second fine-adjustment mechanism is connected to the second edge, the third fine-adjustment mechanism is connected to the third edge, and the fourth fine-adjustment mechanism is connected to the fourth edge; The rotating seat of the first fine-tuning mechanism is located in the middle of the first edge, the rotating seat of the second fine-tuning mechanism is located in the middle of the second edge, the rotating seat of the third fine-tuning mechanism is located in the middle of the third edge, and the rotating seat of the fourth fine-tuning mechanism is located in the middle of the fourth edge.

11. The fine-tuning device according to claim 9, characterized in that: The first direction is the length direction of the base, the second direction is the width direction of the base, and the third direction is the height direction of the base; The first straight line direction is the length direction of the bottom plate, and the second straight line direction is the width direction of the bottom plate.

12. A PCB board testing device, characterized in that: The invention comprises a test fixture and a fine-tuning device as claimed in any one of claims 8 to 11, wherein the test fixture comprises an interlayer, a floating layer and a test needle, the interlayer is mounted on the bottom plate, the floating layer can be floated on the interlayer, the test needle is mounted on the floating layer, and the test needle is used to be electrically connected to a PCB board; The rotating seats of the fine-tuning mechanisms are respectively connected to the floating layers.

13. The PCB board testing device according to claim 12, characterized in that: The floating layer is provided with four notches at its edge, each of which is provided with a connection block, and the connection block is provided with two second connection holes spaced apart from each other, and the two second connection holes are used to connect with the rotating seat; The rotating seats of the four fine-tuning mechanisms are connected to the four connecting blocks in a one-to-one correspondence.

Images