Electronic circuit board inspection device

Abstract

This utility model discloses an electronic circuit board testing device. A support base is fixedly located at the middle of the rear top of a base. A push-pull clamp is fixedly located at the upper front of the support base. A lower pressure plate is fixedly connected to the bottom of the displacement rod of the push-pull clamp. A base plate is fixedly located at the top of the base, directly below the lower pressure plate. An upper mold is fixedly connected to the bottom of the lower pressure plate, and a lower mold is fixedly connected to the top of the base plate. Locking devices are fixedly provided at the four bottom corners of the lower pressure plate and the four top corners of the base plate. Each locking device includes a limiting block, a rotating component, and a pressing block. Each limiting block is fixedly connected to the four corners of its corresponding lower pressure plate and the four corners of the base plate. Each rotating component is rotatably connected to its corresponding limiting block with clearance fit. Each pressing block is fixedly connected to its corresponding rotating component. This utility model has the advantages of cost-saving and convenient replacement of the upper and lower molds according to the size of the electronic circuit board.

Description

Technical Field

[0001] This utility model relates to the field of electronic circuit board testing, and in particular to an electronic circuit board testing device. Background Technology

[0002] When testing electronic circuit boards, test fixtures are required. By pulling down the push-pull clamps, the probes at the bottom of the pressure plate contact the solder pads at the top of the circuit board, thereby measuring the circuit board's function. However, due to the wide variety of electronic circuit boards and their varying sizes, test fixtures cannot be adapted to all sizes of circuit boards. Adding more test fixtures would further increase costs. Utility Model Content

[0003] The purpose of this invention is to provide an electronic circuit board testing device, which has the advantages of saving costs and facilitating the replacement of upper and lower molds according to the size of the electronic circuit board.

[0004] The above-mentioned technical objective of this utility model is achieved through the following technical solution: An electronic circuit board testing device includes a base, a support base, a push-pull clamp, a lower pressure plate, a bottom plate, an upper mold, and a lower mold; The support base is fixedly located at the middle position of the top rear side of the base, the push-pull clamp is fixedly located at the upper front side of the support base, the lower pressure plate is fixedly connected to the bottom of the displacement rod of the push-pull clamp, the base plate is fixedly located at the top of the base, the base plate is located directly below the lower pressure plate, the upper mold is fixedly connected to the bottom of the lower pressure plate, and the lower mold is fixedly connected to the top of the base plate. Locking devices are fixedly provided at the four bottom corners of the lower pressure plate and the four top corners of the base plate; Each of the locking devices includes a limiting block, a rotating component, and a pressing block. Each limiting block is fixedly connected to the four corners of its corresponding lower pressure plate and the four corners of its base plate. Each rotating component is rotatably connected to its corresponding limiting block with clearance fit. Each pressing block is fixedly connected to its corresponding rotating component.

[0005] The preferred option is as follows: Preferably, the limiting block of the locking device located on the left front side of the lower pressure plate is in the shape of a trapezoid, and the distance from the front side to the rear side of the limiting block is 1.5 times the distance from the left side to the right side.

[0006] Preferably, the top of the limiting block is provided with a first circular placement groove; The rotating assembly of the locking device located on the left front side of the lower pressure plate includes a rotating block, a rotating shaft, a pressure block, and a spring; The rotating block is in the shape of a circular plate and is rotatably connected to the first circular placement groove with a clearance fit. The rotating shaft is vertically fixed at the top of the rotating block. The pressure block is a rectangular block with a first circular through hole at the top center. The pressure block is fitted onto the rotating shaft through the first circular through hole. The bottom of the pressure block abuts against the top of the rotating block. The pressure block is fixedly connected to the top of the limiting block. The bottom of the pressure block has an annular groove with the same center as the first circular through hole. The spring is fitted into the annular groove, and the bottom of the spring abuts against the top of the rotating block.

[0007] Preferably, square limiting plates are fixedly provided on the front and rear sides of the upper end of the rotating shaft, and both limiting plates are located above the pressure block. The upper end of the rotating shaft and the two limiting plates are fixedly inserted into the pressure block. The top front and rear sides of the pressure block are provided with square through holes, and each square through hole corresponds to its corresponding limiting plate.

[0008] Preferably, the clamping block of the locking device located on the left front side of the lower pressure plate is a square block, a cylinder is fixedly provided at the top center of the clamping block, and a vertically placed lever is fixedly provided at the top center of the clamping block. The clamping block, cylinder and lever are integrally formed. The bottom center of the clamping block is provided with a second circular placement groove, and the front and rear sides of the bottom of the clamping block are provided with square sliding grooves. The two square sliding grooves correspond to the two square through holes respectively. The rotating shaft is inserted into the second circular placement groove, and the two limiting plates are inserted into the two square sliding grooves respectively.

[0009] Preferably, the left side of the clamping block is provided with a second circular through hole, and the left and rear sides of the second circular through hole of the clamping block are both provided with a first chamfer; The upper left side of the rotating shaft is provided with a threaded through hole corresponding to the second circular through hole. Each second circular through hole is provided with a first countersunk bolt, and each first countersunk bolt is threadedly connected to the threaded through hole.

[0010] Preferably, the limiting block has threaded holes at the top four corners, the pressure block has third circular through holes at the top four corners, each third circular through hole has a second chamfer at the top, each third circular through hole has a second countersunk bolt inside, and each second countersunk bolt is threadedly connected to its corresponding threaded hole.

[0011] Preferably, the vertical cross-sections of the upper and lower molds are both convex, and the steps of the upper and lower molds are provided with openings corresponding to the limiting blocks and pressure blocks. The limiting blocks and pressure blocks are located in the openings, and there is a gap of 0-0.5mm between each pressure block and the opening of its corresponding opening.

[0012] In summary, this utility model has the following beneficial effects: 1. By setting up upper and lower molds, it is possible to change the upper and lower molds when changing electronic circuit boards of different sizes, thereby adapting to the effect of electronic circuit boards of different sizes; 2. The locking device allows for quick and easy fixing of the upper and lower molds when changing them. Attached Figure Description

[0013] Fig. 1 This is a schematic diagram of the overall structural design of the embodiment; Fig. 2 This is a partial cross-sectional view of an embodiment; Fig. 3 This is an exploded view of the locking device on the left front side of the lower pressure plate in the embodiment.

[0014] In the diagram, 1. Base; 2. Support seat; 3. Push-pull clamp; 4. Lower pressure plate; 5. Base plate; 6. Upper mold; 7. Lower mold; 8. Locking device; 9. Rotating assembly; 811. Limiting block; 812. Pressing block; 813. Cylinder; 814. Pulley; 815. First countersunk bolt; 911. Rotating block; 912. Rotating shaft; 913. Pressure block; 914. Spring; 915. Limiting plate; 916. Second countersunk bolt. Detailed Implementation

[0015] The present invention will be further described in detail below with reference to the accompanying drawings.

[0016] Identical components are indicated by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings.

[0017] Electronic circuit board testing equipment, such as Figs. 1-3 As shown, it includes a base 1, a support base 2, a push-pull clamp 3, a lower pressure plate 4, a bottom plate 5, an upper mold 6, and a lower mold 7; The support base 2 is fixedly located at the middle position of the rear top of the base 1. The push-pull clamp 3 is fixedly located at the upper front part of the support base 2. The lower pressure plate 4 is fixedly connected to the bottom of the displacement rod of the push-pull clamp 3. The base plate 5 is fixedly located at the top of the base 1 and is located directly below the lower pressure plate 4. The upper mold 6 is fixedly connected to the bottom of the lower pressure plate 4, and the lower mold 7 is fixedly connected to the top of the base plate 5. Locking devices 8 are fixedly installed at the four bottom corners of the lower pressure plate 4 and the four top corners of the base plate 5; Each locking device 8 includes a limiting block 811, a rotating component 9, and a pressing block 812. Each limiting block 811 is fixedly connected to the four corners of its corresponding lower pressure plate 4 and the four corners of its base plate 5. Each limiting block 811 is integrally formed with its corresponding lower pressure plate 4 and base plate 5. Each rotating component 9 is rotatably connected to its corresponding limiting block 811 with clearance fit. Each pressing block 812 is fixedly connected to its corresponding rotating component 9.

[0018] The vertical cross-sections of the upper mold 6 and the lower mold 7 are both convex. A clamping rod and a probe are provided at the bottom of the upper mold 6, and an electronic circuit board placement slot is provided at the top of the lower mold 7. The upper mold 6 and the lower mold 7 are fixed by a locking device 8 at the steps.

[0019] Specifically, the locking device 8 located on the left front side of the lower pressure plate 4 is described; The locking device 8 located on the left front side of the lower pressure plate 4 has a limiting block 811 in the shape of a trapezoid. The distance from the front to the rear of the limiting block 811 is 1.5 times the distance from the left to the right. This distance difference facilitates the rotation and clamping of the pressing block 812, and the trapezoidal shape ensures sufficient limiting.

[0020] The rotating assembly 9 of the locking device 8 located on the left front side of the lower pressure plate 4 includes a rotating block 911, a rotating shaft 912, a pressure block 913, and a spring 914; a first circular placement groove is provided on the top of the limiting block 811; the rotating block 911 is in the shape of a circular plate and is rotatably connected to the first circular placement groove with clearance fit; the rotating shaft 912 is vertically fixed on the top of the rotating block 911 and can drive the rotating block 911 to rotate in the first circular placement groove through the rotating shaft 912; The pressure block 913 is a rectangular block. The distance from the front to the rear of the pressure block 913 is the same as the distance from the front to the rear of the top of the limiting block 811. The distance from the left to the right of the pressure block 913 is the same as the distance from the left to the right of the top of the limiting block 811. A first circular perforation is provided at the center of the top of the pressure block 913. The pressure block 913 is fitted onto the rotating shaft 912 through the first circular perforation. The bottom of the pressure block 913 abuts against the top of the rotating block 911. The pressure block 913 is fixedly connected to the top of the limiting block 811. A circular groove with the same center as the first circular perforation is provided at the bottom of the pressure block 913. The spring 914 is fitted into the circular groove. The bottom of the spring 914 abuts against the top of the rotating block 911. At this time, the spring 914 is compressed and rebounds. Since the rotating block 911 is inserted into the limiting block 811 with a clearance fit, and there is a tolerance gap of 0-1mm, it will wobble slightly in the first placement groove. In order to ensure that the pressing block 812 is pressed tightly, the rotating block 911 can be pushed in the opposite direction and fixed by the rebound of the spring 914.

[0021] Square limiting plates 915 are fixedly provided on the front and rear sides of the upper end of the rotating shaft 912. Both limiting plates 915 are located above the pressure block 913. The distance from the left side to the right side of the limiting plate 915 is half the diameter of the rotating shaft 912. The upper end of the rotating shaft 912 and the two limiting plates 915 are fixedly inserted into the pressure block 812. The rotating shaft 912, the rotating block 911, and the two limiting plates 915 are integrally formed to increase the stability of their connection. The top front and rear sides of the pressure block 913 are provided with square through holes, and each square through hole corresponds to its corresponding limiting plate 915. During installation, the spring 914 is first placed in the circular groove. Then, from the bottom of the pressure block 913, the upper end of the rotating shaft 912 and the two limiting plates 915 are first passed through the square through holes of the pressure block 913, and the lower end of the rotating shaft 912 is located in the first circular through hole. The limit block 811 has threaded holes at the top four corners, and the pressure block 913 has third circular through holes at the top four corners. Each third circular through hole has a second chamfer at the top and a second countersunk bolt 916 inside each third circular through hole. Each second countersunk bolt 916 is threadedly connected to its corresponding threaded hole. The rotating block 911 is placed in the first circular placement groove of the limit block 811, and then the pressure block 913 is fixed by the second countersunk bolt 916. At this time, the spring 914 is compressed and the rotating block 911 is pressed against.

[0022] The locking device 8 located on the left front side of the lower pressure plate 4 has a square block 812 with a cylinder 813 fixed at the top center of the locking block 812 and a vertically placed lever 814 fixed at the top center of the locking block 812. The locking block 812, cylinder 813 and lever 814 are integrally formed. A second circular placement groove is provided at the bottom center of the clamping block 812. Square sliding grooves are provided on the front and rear sides of the bottom of the clamping block 812. The two square sliding grooves correspond to the two square through holes respectively. The rotating shaft 912 is inserted into the second circular placement groove, and the two limiting plates 915 are inserted into the two square sliding grooves respectively.

[0023] The left side of the clamping block 812 is provided with a second circular through hole, and the left and rear sides of the second circular through hole of the clamping block 812 are provided with a first chamfer. The upper left side of the rotating shaft 912 is provided with a threaded through hole corresponding to the second circular through hole. Each second circular through hole is provided with a first countersunk bolt 815, and each first countersunk bolt 815 is threadedly connected to the threaded through hole.

[0024] The distance from the front side to the rear side of the clamping block 812 is nine-tenths of the distance from the front side to the rear side of the clamping block 913, and the distance from the left side to the right side of the clamping block 812 is three-fifths of the distance from the left side to the right side of the clamping block 913; After the pressure block 913 is fixed, the clamping block 812 is fitted onto the rotating shaft 912 and the two limiting plates 915, and then fixed by the first countersunk bolt 815. The upper mold 6 and the lower mold 7 have openings corresponding to the limiting block 811 and the pressure block 913 at the step. The limiting block 811 and the pressure block 913 are both located in the openings. Each pressure block 913 has a gap of 0-0.5mm at the opening of its corresponding opening, that is, the pressure block 913 is sunk into its corresponding opening by 0-0.5mm, which makes it easy for the clamping block 812 to clamp.

[0025] Specific implementation process: Step 1: The upper mold 6 and the lower mold 7 need to be replaced. The operator rotates the clamping block 812 to change it from horizontal to vertical, thereby removing the upper mold 6 and the lower mold 7 respectively. Step 2: Place the lower mold 7 that needs to be replaced on top of the base plate 5, and fit the four through holes of the lower mold 7 onto the limiting block 811 respectively. Step 3: The operator pinches the lever 814 and pulls the clamping block 812 upward. The top of the rotating block 911 abuts against the bottom of the pressure block 913. Then, the operator rotates the clamping block 812 from the longitudinal direction to the transverse direction. The clamping block 812 presses against the lower mold 7. The spring 914 rebounds slightly to prevent the clamping block 812 from loosening, thereby completing the fixation of the lower mold 7. Step 4: The operator places the upper mold 6 to be replaced on the bottom top of the lower pressure plate 4. The four through holes of the upper mold 6 are respectively fitted onto the corresponding limit blocks 811. The operator lifts the upper mold 6 upwards. Step 5: The operator pinches the lever 814 and pulls down the pressing block 812. The bottom of the rotating block 911 abuts against the top of the pressing block 913. Then, the operator rotates the pressing block 812 from the longitudinal direction to the transverse direction. The pressing block 812 presses against the upper mold 6. The spring 914 rebounds slightly to prevent the pressing block 812 from loosening, thus completing the fixation of the upper mold 6.

[0026] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. An electronic circuit board inspection apparatus characterized by comprising: Includes base (1), support base (2), push-pull clamp (3), lower pressure plate (4), bottom plate (5), upper mold (6), and lower mold (7); The support base (2) is fixedly located at the middle position of the rear top of the base (1), the push-pull clamp (3) is fixedly located at the upper front part of the support base (2), the lower pressure plate (4) is fixedly connected to the bottom of the displacement rod of the push-pull clamp (3), the base plate (5) is fixedly located at the top of the base (1), the base plate (5) is located directly below the lower pressure plate (4), the upper mold (6) is fixedly connected to the bottom of the lower pressure plate (4), and the lower mold (7) is fixedly connected to the top of the base plate (5). Locking devices (8) are fixedly provided at the bottom four corners of the lower pressure plate (4) and the top four corners of the base plate (5). Each of the locking devices (8) includes a limiting block (811), a rotating component (9), and a pressing block (812). Each limiting block (811) is fixedly connected to the four corners of its corresponding lower pressure plate (4) and the four corners of its base plate (5). Each rotating component (9) is rotatably connected to its corresponding limiting block (811) with clearance fit. Each pressing block (812) is fixedly connected to its corresponding rotating component (9).

2. The electronic circuit board inspection apparatus according to claim 1, characterized by: The locking device (8) located on the left front side of the lower pressure plate (4) has a limiting block (811) in the shape of a trapezoid, and the distance from the front side to the rear side of the limiting block (811) is 1.5 times the distance from the left side to the right side.

3. The electronic circuit board inspection apparatus according to claim 2, characterized by: The top of the limiting block (811) is provided with a first circular placement groove; The rotating assembly (9) of the locking device (8) located on the left front side of the lower pressure plate (4) includes a rotating block (911), a rotating shaft (912), a pressure block (913), and a spring (914). The rotating block (911) is in the shape of a circular plate. The rotating block (911) is rotatably connected to the first circular placement groove with a clearance fit. The rotating shaft (912) is vertically fixed at the top of the rotating block (911). The pressure block (913) is a rectangular block. A first circular perforation is provided at the top center of the pressure block (913). The pressure block (913) is sleeved on the rotating shaft (912) through the first circular perforation. The bottom of the pressure block (913) abuts against the top of the rotating block (911). The pressure block (913) is fixedly connected to the top of the limiting block (811). A circular groove with the same center as the first circular perforation is provided at the bottom of the pressure block (913). The spring (914) is sleeved in the circular groove. The bottom of the spring (914) abuts against the top of the rotating block (911).

4. The electronic circuit board inspection apparatus according to claim 3, characterized by: Square limiting plates (915) are fixedly provided on the front and rear sides of the upper end of the rotating shaft (912). Both limiting plates (915) are located above the pressure block (913). The upper end of the rotating shaft (912) and the two limiting plates (915) are fixedly inserted into the pressure block (812). The pressure block (913) has square perforations on its top front and rear sides, and each square perforation corresponds to its corresponding limiting plate (915).

5. The electronic circuit board inspection apparatus according to claim 4, characterized by: The clamping block (812) of the locking device (8) located on the left front side of the lower pressure plate (4) is a square block. A cylinder (813) is fixedly provided at the top center of the clamping block (812). A vertically placed lever (814) is fixedly provided at the top center of the clamping block (812). The clamping block (812), cylinder (813) and lever (814) are integrally formed. The bottom center of the clamping block (812) is provided with a second circular placement groove. The front and rear sides of the bottom of the clamping block (812) are provided with square sliding grooves. The two square sliding grooves correspond to the two square through holes respectively. The rotating shaft (912) is inserted into the second circular placement groove. The two limiting plates (915) are inserted into the two square sliding grooves respectively.

6. The electronic circuit board inspection apparatus according to claim 5, characterized by: The left side of the clamping block (812) is provided with a second circular through hole, and the left and rear sides of the second circular through hole of the clamping block (812) are provided with a first chamfer. The upper left side of the rotating shaft (912) is provided with a threaded through hole corresponding to the second circular through hole. Each second circular through hole is provided with a first countersunk bolt (815), and each first countersunk bolt (815) is threadedly connected to the threaded through hole.

7. The electronic circuit board inspection apparatus according to claim 6, characterized by: The limiting block (811) has threaded holes at the top four corners, and the pressure block (913) has third circular through holes at the top four corners. Each third circular through hole has a second chamfer at the top and a second countersunk bolt (916) inside each third circular through hole. Each second countersunk bolt (916) is threadedly connected to its corresponding threaded hole.

8. The electronic circuit board inspection apparatus according to claim 6, characterized by: The vertical cross-sections of the upper mold (6) and the lower mold (7) are both convex. The upper mold (6) and the lower mold (7) have openings at the steps corresponding to the limiting block (811) and the pressure block (913). The limiting block (811) and the pressure block (913) are both located in the openings. Each pressure block (913) has a gap of 0-0.5mm at the opening of its corresponding opening.

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