A circuit test fixture

Abstract

The utility model relates to the technical field of test fixtures, and discloses a circuit test fixture, including a bottom plate, wherein two movable plates are arranged on the top surface of the bottom plate, a fixing assembly is arranged between the two movable plates, and the fixing assembly includes two connecting plates arranged on both sides of the two movable plates close to each other, and sliding grooves are provided on both sides of the two connecting plates close to each other, and two sliding bars are arranged inside the sliding groove, and the sliding bar close to the bottom surface of the sliding groove is fixed to the bottom surface of the sliding groove. The utility model drives the connecting plate and the sliding bar to approach the two sides of the circuit board respectively by arranging two movable plates, and then rotates the first screw rod to drive the fixing bar to move horizontally according to the distribution of electronic components on the circuit board, so as to avoid the electronic components on the circuit board, and at this time, the hydraulic rod is started to make the two sliding bars drive the fixing bar to fit with the top and bottom surfaces of the circuit board, so as to achieve the clamping and fixing of the circuit board, thereby increasing the applicability of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of test fixtures, in particular to a circuit test fixture. Background Art

[0002] An integrated circuit is a miniature electronic device or component. It uses a certain process to interconnect the transistors, resistors, capacitors, inductors and other components and wiring required in a circuit. It is made on a small piece or several small pieces of semiconductor wafers or dielectric substrates, and then packaged in a tube shell to become a miniature structure with the required circuit function. All components have formed a whole in structure, making a big step forward for electronic components towards miniaturization, low power consumption, intelligence and high reliability. Now it is necessary to perform circuit testing on integrated circuit boards.

[0003] An existing integrated circuit test fixture (Announcement No.: CN220305441U) has the following defects: the above-mentioned device can drive the fixed circuit board to rotate by adopting a flip motor during use, but the fixing point of the circuit board of the fixing mechanism of the device is fixed and cannot be changed according to the position of the components on the circuit board, resulting in that the device can only fix a small number of circuit boards, resulting in insufficient applicability of the device. At the same time, the driving force of the flip mechanism of the device is unilaterally driven. If it is necessary to drive the circuit board to flip, a torque will be applied to the circuit board to flip it, which may cause damage to the circuit board. For this reason, the present utility model is proposed. Utility Model Content

[0004] The utility model aims to solve the problems existing in the prior art and provides a circuit testing fixture.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A circuit testing fixture comprises a base plate, wherein two movable plates are arranged on the top surface of the base plate, a fixing assembly is arranged between the two movable plates, the fixing assembly comprises two connecting plates arranged on both sides of the two movable plates close to each other, sliding grooves are provided on both sides of the two connecting plates close to each other, two sliding bars are provided inside the sliding groove, the sliding bar close to the bottom surface of the sliding groove is fixed to the bottom surface of the sliding groove, and the sliding bar away from the bottom surface of the sliding groove is slidably arranged inside the sliding groove, two driving grooves are provided on one side of the sliding bar, a fixing bar is slidably provided inside the driving groove, and the fixing bar is an L-shaped structure.

[0007] Preferably, the driving groove is internally rotatably connected with a first screw rod, the fixing bar is threadedly connected to the outer wall of the first screw rod, and extension waist holes are provided on the left and right sides of the connecting plate, one end of the first screw rod passes through the extension waist hole and extends to one side of the connecting plate, a hydraulic rod is fixed to the top surface of the connecting plate, one end of the hydraulic rod telescopic rod passes through the top surface of the connecting plate and extends to the inside of the sliding groove, one end of the hydraulic rod telescopic rod is fixed to the top surface of the sliding bar, a connecting groove is provided on the top surface of the bottom plate, a first motor is fixed to the front side of the bottom plate, the output shaft of the first motor passes through the front side of the bottom plate and extends to the inside of the connecting groove, a bidirectional screw rod is fixed to the output shaft of the first motor, and the movable plate is threadedly connected to the outer wall of the bidirectional screw rod.

[0008] Preferably, a rotating shaft is fixed on both sides of the two connecting plates that are away from each other, and the rotating shaft is rotatably connected to one side of the movable plate. The movable plate is a hollow structure, and a gear is fixed on the outer wall of the rotating shaft located inside the movable plate. The movable plate is rotatably connected to a linkage shaft, and a gear is fixed to the outer wall of the linkage shaft. The gear of the rotating shaft and the gear of the linkage shaft are meshed and transmitted through a toothed belt. The interior of the connecting groove is rotatably connected to a square rod, and the linkage shaft and the outer wall of the square rod are slidably arranged. A second motor is fixed to one side of the movable plate close to the front side of the base plate, and the output shaft of the second motor is fixed to one end of the rotating shaft.

[0009] Preferably, a rubber pad is fixed to one end of the fixing strip.

[0010] Preferably, a scale is engraved on one side of the sliding bar, and a finger block is fixed on the top surface of the fixed bar, with the end of the finger block pointing to the scale.

[0011] Preferably, two first limit rods are inserted through and slidably disposed on the top surface of the connecting plate, the bottom ends of the first limit rods are fixed to the top surface of the sliding bar, two second limit rods are fixed inside the connecting groove, and the movable plate and the outer walls of the second limit rods are slidably disposed.

[0012] The beneficial effects of the utility model are:

[0013] Two movable plates are arranged to drive the connecting plate and the sliding bar to approach the two sides of the circuit board respectively, and then according to the distribution of electronic components on the circuit board, the first screw is rotated to drive the fixing bar to move laterally, so as to avoid the electronic components on the circuit board. At this time, the hydraulic rod is started to make the two sliding bars drive the fixing bar to fit with the top and bottom surfaces of the circuit board, so as to achieve the clamping and fixing of the circuit board, thereby increasing the applicability of the device, and the two connecting plates are linked by a square rod to rotate synchronously, so as to prevent the unilateral connection plate from causing torque on the circuit board and damaging the circuit board, thereby achieving the protection of the circuit board from damage while rotating the circuit board during the detection process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure proposed by the utility model;

[0015] Figure 2 This is a schematic diagram of the three-dimensional split structure proposed by the utility model;

[0016] Figure 3 This is a schematic diagram of the three-dimensional structure of the connecting plate proposed by the utility model;

[0017] Figure 4 This is a schematic diagram of the three-dimensional structure of the movable plate proposed by the utility model.

[0018] In the figure: 1, bottom plate; 101, movable plate; 2, connecting plate; 201, sliding groove; 202, sliding bar; 203, driving groove; 204, fixing bar; 205, first screw rod; 206, extension waist hole; 207, hydraulic rod; 208, connecting groove; 209, two-way screw rod; 3, rotating shaft; 301, linkage shaft; 302, square rod; 4, rubber pad; 5, finger block; 6, first limit rod; 601, second limit rod. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Please see attached Figure 1 -Attached Figure 4 A circuit test fixture comprises a bottom plate 1, wherein two movable plates 101 are arranged on the top surface of the bottom plate 1, a fixing assembly is arranged between the two movable plates 101, and the fixing assembly comprises two connecting plates 2 arranged on both sides of the two movable plates 101 close to each other, sliding grooves 201 are provided on both sides of the two connecting plates 2 close to each other, and two sliding bars 202 are arranged inside the sliding groove 201, the sliding bar 202 close to the bottom surface of the sliding groove 201 is fixed to the bottom surface of the sliding groove 201, and the sliding bar 202 away from the bottom surface of the sliding groove 201 is slidably arranged inside the sliding groove 201, and two driving grooves 203 are arranged on one side of the sliding bar 202, and a fixing bar 204 is slidably arranged inside the driving groove 203, and the fixing bar 204 is an L-shaped structure.

[0022] In the embodiment, the driving groove 203 is internally rotatably connected with a first screw rod 205, the fixing bar 204 is threadedly connected to the outer wall of the first screw rod 205, and the left and right sides of the connecting plate 2 are provided with extension waist holes 206, one end of the first screw rod 205 passes through the extension waist hole 206 and extends to one side of the connecting plate 2, and a hydraulic rod 207 is fixed to the top surface of the connecting plate 2, and one end of the telescopic rod of the hydraulic rod 207 passes through the top surface of the connecting plate 2 and extends to the inside of the sliding groove 201, and one end of the telescopic rod of the hydraulic rod 207 is fixed to the top surface of the sliding bar 202, and a connecting groove 208 is provided on the top surface of the bottom plate 1, and a first motor is fixed to the front side of the bottom plate 1, and the output shaft of the first motor passes through the bottom plate 1. The front side of the plate 1 extends to the inside of the connecting groove 208, and the output shaft of the first motor is fixed with a bidirectional screw rod 209. The movable plate 101 is threadedly connected to the outer wall of the bidirectional screw rod 209. By setting two movable plates 101, the connecting plate 2 and the sliding bar 202 are driven to approach the two sides of the circuit board respectively. Then, according to the distribution of electronic components on the circuit board, the first screw rod 205 is rotated to drive the fixed bar 204 to move horizontally, so as to avoid the electronic components on the circuit board. At this time, starting the hydraulic rod 207 can make the two sliding bars 202 drive the fixed bar 204 to fit with the top and bottom surfaces of the circuit board, thereby realizing the clamping and fixation of the circuit board, thereby increasing the applicability of the device.

[0023] In the embodiment, the two sides of the two connecting plates 2 that are away from each other are fixed with a rotating shaft 3, and the rotating shaft 3 is rotatably connected to one side of the movable plate 101. The movable plate 101 is a hollow structure, and a gear is fixed on the outer wall of the rotating shaft 3 located inside the movable plate 101. The internal rotation of the movable plate 101 is connected with a linkage shaft 301, and a gear is fixed on the outer wall of the linkage shaft 301. The gear of the rotating shaft 3 and the gear of the linkage shaft 301 are meshed and transmitted through a toothed belt. The internal rotation of the connecting groove 208 is connected with a square rod 302, and the linkage shaft 301 and the outer wall of the square rod 302 are slidingly arranged. A second motor is fixed to one side of the movable plate 101 close to the front side of the base plate 1, and the output shaft of the second motor is fixed to one end of the rotating shaft 3. The two connecting plates 2 are linked to rotate synchronously by adopting the square rod 302, so as to prevent the rotation of the unilateral connecting plate 2 from causing torque to the circuit board, causing damage to the circuit board, thereby achieving the protection of the circuit board from damage while rotating the circuit board during the detection process.

[0024] In the embodiment, a rubber pad 4 is fixed to one end of the fixing strip 204. By setting and using the rubber pad 4 and taking advantage of the characteristics of the rubber pad 4 being soft and having a large friction coefficient, the circuit board can be better clamped and fixed.

[0025] In the embodiment, a scale is engraved on one side of the sliding bar 202, and a finger block 5 is fixed on the top surface of the fixed bar 204, with the end of the finger block 5 pointing to the scale. By setting the finger block 5 and pointing the end of the finger block 5 to the scale on the sliding bar 202, it is convenient for the staff to more accurately adjust the position of the fixed bar 204, so as to facilitate the clamping and fixing of circuit boards of different models.

[0026] In the embodiment, two first limiting rods 6 are inserted through and slidably provided on the top surface of the connecting plate 2, the bottom end of the first limiting rod 6 is fixed to the top surface of the sliding bar 202, two second limiting rods 601 are fixed inside the connecting groove 208, the outer wall of the movable plate 101 and the second limiting rod 601 is slidingly arranged, and the first limiting rod 6 and the second limiting rod 601 are used to limit the sliding bar 202 and the movable plate 101, so that the sliding bar 202 and the movable plate 101 are more stable during movement, thereby increasing the reliability of the device.

[0027] Working principle: When in use, the circuit board to be tested is placed between the two movable plates 101, and then the first motor is started to drive the bidirectional screw rod 209 to rotate. Under the threaded connection between the movable plate 101 and the bidirectional screw rod 209, the two movable plates 101 drive the connecting plate 2 and the sliding bar 202 to approach the two sides of the circuit board respectively. Then, according to the distribution of electronic components on the circuit board, the first screw rod 205 is rotated, and under the threaded connection between the fixed bar 204 and the first screw rod 205, the fixed bar 204 is moved laterally to avoid the electronic components on the circuit board. At this time, starting the hydraulic rod 207 can make the two sliding bars 202 drive the fixed bar 204 to fit with the top and bottom surfaces of the circuit board, thereby clamping and fixing the circuit board. When the circuit board needs to be rotated during the test, the second motor is started to drive one of the rotating shafts 3 to rotate, and the gear of the rotating shaft 3 is connected to the coupling. The gear of the moving shaft 301 is meshed with the toothed belt to drive the linkage shaft 301 to rotate the square rod 302. As the square rod 302 rotates, the two linkage shafts 301 rotate synchronously, so that the two rotating shafts 3 rotate synchronously, the two connecting plates 2 rotate synchronously, and the circuit board is driven to flip. By setting and using the rubber pad 4, the rubber pad 4 is soft and has a large friction coefficient, so that the circuit board can be better clamped and fixed. By setting the finger block 5 and pointing the end of the finger block 5 to the scale on the sliding bar 202, it is convenient for the staff to more accurately adjust the position of the fixing bar 204, so as to clamp and fix circuit boards of different models. The first limiting rod 6 and the second limiting rod 601 limit the sliding bar 202 and the movable plate 101, so that the sliding bar 202 and the movable plate 101 are more stable during movement, thereby increasing the reliability of the device.

[0028] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A circuit testing fixture, comprising a base plate (1), characterized in that: Two movable plates (101) are arranged on the top surface of the bottom plate (1), a fixing assembly is arranged between the two movable plates (101), and the fixing assembly comprises two connecting plates (2) arranged on both sides of the two movable plates (101) close to each other, sliding grooves (201) are provided on both sides of the two connecting plates (2) close to each other, two sliding bars (202) are arranged inside the sliding groove (201), the sliding bar (202) close to the bottom surface of the sliding groove (201) is fixed to the bottom surface of the sliding groove (201), and the sliding bar (202) away from the bottom surface of the sliding groove (201) is slidably arranged inside the sliding groove (201), two driving grooves (203) are arranged on one side of the sliding bar (202), and a fixing bar (204) is slidably arranged inside the driving groove (203), and the fixing bar (204) is an L-shaped structure.

2. A circuit testing fixture according to claim 1, characterized in that: The driving groove (203) is internally rotatably connected with a first screw rod (205), the fixing strip (204) is threadedly connected to the outer wall of the first screw rod (205), the left and right sides of the connecting plate (2) are both provided with extension waist holes (206), one end of the first screw rod (205) passes through the extension waist hole (206) and extends to one side of the connecting plate (2), a hydraulic rod (207) is fixed on the top surface of the connecting plate (2), and one end of the telescopic rod of the hydraulic rod (207) passes through the top of the connecting plate (2). The bottom plate (1) is provided with a connecting groove (208), and a first motor is fixed to the front side of the bottom plate (1). The output shaft of the first motor passes through the front side of the bottom plate (1) and extends to the inside of the connecting groove (208). A bidirectional screw rod (209) is fixed to the output shaft of the first motor. The movable plate (101) is threadedly connected to the outer wall of the bidirectional screw rod (209).

3. A circuit testing fixture according to claim 2, characterized in that: A rotating shaft (3) is fixed on both sides of the two connecting plates (2) that are away from each other. The rotating shaft (3) is rotatably connected to one side of the movable plate (101). The movable plate (101) is a hollow structure. A gear is fixed on the outer wall of the rotating shaft (3) located inside the movable plate (101). The movable plate (101) is rotatably connected to a linkage shaft (301). A gear is fixed on the outer wall of the linkage shaft (301). The gear of the rotating shaft (3) and the gear of the linkage shaft (301) are meshed and driven by a toothed belt. The interior of the connecting groove (208) is rotatably connected to a square rod (302). The linkage shaft (301) and the outer wall of the square rod (302) are slidably arranged. A second motor is fixed on one side of the movable plate (101) close to the front side of the bottom plate (1). The output shaft of the second motor is fixed to one end of the rotating shaft (3).

4. A circuit testing fixture according to claim 3, characterized in that: A rubber pad (4) is fixed to one end of the fixing strip (204).

5. A circuit testing fixture according to claim 4, characterized in that: One side of the sliding bar (202) is engraved with a scale, and a finger block (5) is fixed on the top surface of the fixed bar (204), with the end of the finger block (5) pointing to the scale.

6. A circuit testing fixture according to claim 5, characterized in that: Two first limiting rods (6) are inserted through and slidably disposed on the top surface of the connecting plate (2); the bottom ends of the first limiting rods (6) are fixed to the top surface of the sliding bar (202); two second limiting rods (601) are fixed inside the connecting groove (208); and the movable plate (101) and the outer wall of the second limiting rods (601) are slidably disposed.

Images