Circuit board test tool

Abstract

The utility model discloses a circuit board testing tool which comprises a substrate, at least one clamping unit is arranged on the substrate, each clamping unit comprises four clamping pieces, arc-shaped clamping surfaces are formed on the side surfaces of the clamping pieces, the clamping pieces are hinged to the substrate through hinges and can rotate relative to the substrate, and the clamping pieces are arranged on the substrate. The connecting lines of the rotating axes of the four clamping pieces form a rectangle; the distance from one end of the arc-shaped clamping face of the clamping piece to the rotating axis is larger than the distance from the other end of the arc-shaped clamping face to the rotating axis. According to the circuit board testing tool, the clamping pieces with the arc-shaped clamping surfaces are arranged, and the distances from the two ends of the arc-shaped clamping surfaces to the rotating axis are different, so that the placing space formed between the clamping pieces changes when the clamping pieces rotate, the circuit board testing tool is suitable for circuit boards to be tested with different sizes, the design and manufacturing cost is saved, and the circuit board testing tool is simple and convenient to use.

Description

TECHNICAL FIELD

[0001] The utility model relates to circuit board detection technical field, concretely relates to a circuit board test frock. BACKGROUND

[0002] The utility model discloses a kind of circuit board test fixture and testing device, the test fixture is relatively arranged two L-shaped clamping pieces on base plate, rectangular space is formed between two L-shaped clamping pieces, for placing the circuit board to be measured, and using L-shaped clamping piece clamps and fixes circuit board.The technical problem existing in the scheme is that the space between two L-shaped clamping pieces is fixed, and cannot be adjusted at will, so test device must be specially designed and manufactured for the circuit board to be measured, and cannot be suitable for multiple sizes of circuit board simultaneously. UTILITY MODEL CONTENTS

[0003] The utility model solves the technical problem to provide a kind of circuit board test frock, and multiple sizes of circuit board to be measured can be simultaneously suitable.

[0004] In order to solve the above technical problem, the utility model provides a kind of circuit board test frock, including base plate, at least one clamping unit is provided on the base plate, each clamping unit includes four clamping pieces, the side of the clamping piece is formed with arc clamping surface, the clamping piece is hinged to the base plate and can rotate relative to the base plate, and the connecting line of the rotation axis of four clamping pieces is rectangle;The distance from the one end of the arc clamping surface of the clamping piece to rotation axis is greater than the distance from the other end of the arc clamping surface to rotation axis.

[0005] Further, the arc clamping surface of the clamping piece is covered with rubber layer.

[0006] Further, the distance from the one end of the arc clamping surface of the clamping piece to rotation axis is twice the distance from the other end of the arc clamping surface to rotation axis.

[0007] Further, one end of the hinge is fixed relative to the clamping piece, the other end of the hinge passes through the base plate and is fixed with first gear relative to the base plate, and the adjacent first gears constituting the short side of the rectangle are directly engaged with each other or are engaged with each other through a pair of first transition gears;The adjacent first gears constituting the long side of the rectangle are engaged with each other through a pair of second transition gears.

[0008] Further, one of the first gear, the first transition gear or the second transition gear is provided with operating handle.

[0009] Further, at least one of the first gear, the first transition gear or the second transition gear is provided with a locking pin, one end of the locking pin penetrating a threaded hole on the gear and abutting against the base plate.

[0010] Further, one of the first gear, the first transition gear or the second transition gear is provided with a driving gear engaging with the gear, the driving gear being provided with an operating handle.

[0011] Further, the driving gear is provided with a locking pin, one end of the locking pin penetrating a threaded hole on the driving gear and abutting against the base plate.

[0012] The circuit board testing tool has the advantages that the clamping pieces are provided with arc-shaped clamping surfaces, the distances from the two ends of the arc-shaped clamping surfaces to the rotating shaft are different, the placing space formed between the clamping pieces changes when the clamping pieces rotate, different sizes of the circuit boards to be tested can be accommodated, the design and manufacturing costs are saved, and the circuit board testing tool is simple to use. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a top view of a first use state of the first embodiment of the circuit board testing tool.

[0014] Figure 2 is a top view of a second use state of the first embodiment of the circuit board testing tool.

[0015] Figure 3 is a bottom view of the first embodiment of the circuit board testing tool.

[0016] Figure 4 is a side view of the first embodiment of the circuit board testing tool.

[0017] Figure 5 is a bottom view of the second embodiment of the circuit board testing tool.

[0018] In the drawings: 1, base plate; 2, clamping piece; 3, arc-shaped clamping surface; 4, hinge; 5, circuit board to be tested; 6, first gear; 7, second transition gear; 8, locking pin; 9, operating handle; 10, first transition gear; 11, driving gear. DETAILED DESCRIPTION

[0019] The utility model will be further described in connection with the drawings and specific embodiments, so that the person skilled in the art can better understand the utility model and can be implemented, but the embodiment is not as the limitation of the utility model.

[0020] As Figures 1-2As shown in the utility model in one embodiment, the circuit board testing tool comprises a base plate 1, and a clamping unit is arranged on the base plate 1; each clamping unit comprises four clamping pieces 2, arc clamping surfaces 3 are formed on the side surfaces of the clamping pieces 2, the clamping pieces 2 are hingedly connected to the base plate 1 and can rotate relative to the base plate 1, and the connecting line of the rotation axes of the four clamping pieces 2 is a rectangle; the distance from one end of the arc clamping surface 3 of the clamping piece 2 to the rotation axis is greater than the distance from the other end of the arc clamping surface 3 to the rotation axis. Since the clamping pieces 2 are provided with the arc clamping surfaces 3, the arc clamping surfaces 3 all face the inner side of the clamping unit, and the distances from the two ends of the arc clamping surface 3 to the rotation axis are different, so that the placing space formed between the clamping pieces 2 changes when the clamping pieces 2 rotate, thereby adapting to circuit boards 5 of different sizes to be tested, and the design and manufacturing costs are saved and the use is simple.

[0021] As shown in the utility model in one embodiment, the circuit board testing tool comprises a base plate 1, and a clamping unit is arranged on the base plate 1; each clamping unit comprises four clamping pieces 2, arc clamping surfaces 3 are formed on the side surfaces of the clamping pieces 2, the clamping pieces 2 are hingedly connected to the base plate 1 and can rotate relative to the base plate 1, and the connecting line of the rotation axes of the four clamping pieces 2 is a rectangle; the distance from one end of the arc clamping surface 3 of the clamping piece 2 to the rotation axis is greater than the distance from the other end of the arc clamping surface 3 to the rotation axis. Since the clamping pieces 2 are provided with the arc clamping surfaces 3, the arc clamping surfaces 3 all face the inner side of the clamping unit, and the distances from the two ends of the arc clamping surface 3 to the rotation axis are different, so that the placing space formed between the clamping pieces 2 changes when the clamping pieces 2 rotate, thereby adapting to circuit boards 5 of different sizes to be tested, and the design and manufacturing costs are saved and the use is simple. Figure 1 As shown in the utility model in one embodiment, the circuit board testing tool comprises a base plate 1, and a clamping unit is arranged on the base plate 1; each clamping unit comprises four clamping pieces 2, arc clamping surfaces 3 are formed on the side surfaces of the clamping pieces 2, the clamping pieces 2 are hingedly connected to the base plate 1 and can rotate relative to the base plate 1, and the connecting line of the rotation axes of the four clamping pieces 2 is a rectangle; the distance from one end of the arc clamping surface 3 of the clamping piece 2 to the rotation axis is greater than the distance from the other end of the arc clamping surface 3 to the rotation axis. Since the clamping pieces 2 are provided with the arc clamping surfaces 3, the arc clamping surfaces 3 all face the inner side of the clamping unit, and the distances from the two ends of the arc clamping surface 3 to the rotation axis are different, so that the placing space formed between the clamping pieces 2 changes when the clamping pieces 2 rotate, thereby adapting to circuit boards 5 of different sizes to be tested, and the design and manufacturing costs are saved and the use is simple. Figure 2 As shown in the utility model in one embodiment, the circuit board testing tool comprises a base plate 1, and a clamping unit is arranged on the base plate 1; each clamping unit comprises four clamping pieces 2, arc clamping surfaces 3 are formed on the side surfaces of the clamping pieces 2, the clamping pieces 2 are hingedly connected to the base plate 1 and can rotate relative to the base plate 1, and the connecting line of the rotation axes of the four clamping pieces 2 is a rectangle; the distance from one end of the arc clamping surface 3 of the clamping piece 2 to the rotation axis is greater than the distance from the other end of the arc clamping surface 3 to the rotation axis. Since the clamping pieces 2 are provided with the arc clamping surfaces 3, the arc clamping surfaces 3 all face the inner side of the clamping unit, and the distances from the two ends of the arc clamping surface 3 to the rotation axis are different, so that the placing space formed between the clamping pieces 2 changes when the clamping pieces 2 rotate, thereby adapting to circuit boards 5 of different sizes to be tested, and the design and manufacturing costs are saved and the use is simple.

[0022] In other embodiments, a plurality of clamping units can be arranged on the same base plate 1, so that a plurality of circuit boards 5 to be tested can be clamped at the same time, and the plurality of circuit boards 5 to be tested can be tested at the same time. The sizes of the circuit boards 5 to be tested clamped by the plurality of clamping units on the same base plate 1 can be the same or different. In implementation, the distance between the four clamping pieces 2 constituting the clamping unit can be set according to the size of the circuit board 5 to be clamped.

[0023] Preferably, a rubber layer (not shown in the figure) can be covered on the arc clamping surface 3 of the clamping piece 2. Since the rubber layer has elasticity, when the arc clamping surface 3 of the clamping piece 2 contacts the circuit board 5 to be tested, the rubber layer is compressed to a certain extent, so that a certain clamping force is provided while the circuit board 5 to be tested is protected from being damaged.

[0024] In the utility model, the distance from one end of the arc clamping surface 3 of the clamping piece 2 to the rotation axis is greater than the distance from the other end of the arc clamping surface 3 to the rotation axis, but when the difference is too large, the arc of the arc clamping surface 3 is too small (i.e. the radius of the arc is too large), and it is difficult to clamp the to-be-tested circuit board 5. Therefore, the distance from one end of the arc clamping surface 3 of the clamping piece 2 to the rotation axis is preferably twice the distance from the other end of the arc clamping surface 3 to the rotation axis.

[0025] As an embodiment of the utility model, as shown in Figure 3 and Figure 4 One end of the hinge 4 is fixedly connected with the clamping piece 2, and the other end of the hinge 4 penetrates through the base plate 1 and is fixedly connected with the first gear 6, the adjacent first gears 6 forming the short side of the rectangle directly mesh with each other or mesh with each other through the pair of first transition gears 10, and the adjacent first gears 6 forming the long side of the rectangle mesh with each other through the pair of second transition gears 7. In the embodiment shown in Figure 3 , the adjacent first gears 6 forming the short side of the rectangle directly mesh with each other. Through the meshing gears, the four clamping pieces 2 can be simultaneously rotated in opposite directions in operation, that is, the rotating directions of the clamping pieces 2 at the two ends of any side are opposite. The operation is convenient, and the clamping position can also be guaranteed to be accurate. It should be noted that when the transition gears are arranged between the first gears, the transition gears must be arranged in pairs, so that the clamping pieces can be rotated in the correct direction.

[0026] In the embodiments shown in Figure 3 and Figure 4 , an operation handle 9 is arranged on one of the first gears 6. The operation handle 9 is used for rotating by the user to drive the first gear 6 and rotate the clamping piece 2. In other embodiments, the operation handle 9 can also be arranged on any one of the first transition gears 10 and the second transition gears 7. Since the gears are directly or indirectly meshed with each other, the rotating force applied to any gear can drive all the gears and the clamping pieces 2 to rotate simultaneously, and the effect is the same.

[0027] In the embodiments shown in Figure 3 and Figure 4 , a locking pin 8 is arranged on one of the first gears 6, one end of the locking pin 8 penetrating through the threaded hole on the gear and abutting against the base plate 1. The locking pin 8 is matched with the threaded hole on the gear through the thread, when the gear is rotated to the position where the clamping piece 2 clamps the to-be-tested circuit board 5, the locking pin 8 is rotated, and the end of the locking pin 8 abuts against the base plate 1, the gear is locked by the frictional force between the locking pin 8 and the base plate 1 so as to be unable to rotate, thereby ensuring that the clamping piece 2 stably clamps the to-be-tested circuit board 5. After the test is completed, the locking pin 8 is reversely rotated to release the abutting force of the end of the locking pin 8 against the base plate 1, and the gear can be rotated, so that the clamping of the clamping piece 2 to the to-be-tested circuit board 5 can be released, and then the to-be-tested circuit board 5 can be taken out.

[0028] In other embodiments, the locking pin 8 may also be provided on the first transition gear 10 or the second transition gear 7. The locking pin 8 may be provided on only one gear or on multiple gears at the same time to ensure higher reliability.

[0029] like Figure 5 In the illustrated embodiment, a drive gear 11 is provided on one side of one of the second transition gears 7, meshing therewith. The drive gear 11 is provided with an operating handle 9. In other words, the present invention can also include a dedicated drive gear 11, with the operating handle 9 located on the drive gear 11, to apply rotational force to the various gears. Of course, in other embodiments, the drive gear 11 can also be provided on the side of the first gear 6 or the first transition gear 10, meshing therewith, with the same effect. Furthermore, the locking pin 8 can also be provided on the drive gear 11.

[0030] The above-described embodiments are merely preferred embodiments for the purpose of fully illustrating the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are within the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

Claims

1. A test fixture for a circuit board, the test fixture comprising: The invention discloses a substrate with at least one clamping unit, each clamping unit comprising four clamping pieces, the side of the clamping pieces is formed with an arc-shaped clamping surface, the clamping pieces are hinged to the substrate through a hinge and can rotate relative to the substrate, the connecting line of the rotation axes of the four clamping pieces is a rectangle; the distance from one end of the arc-shaped clamping surface to the rotation axis is greater than the distance from the other end of the arc-shaped clamping surface to the rotation axis.

2. The test fixture of claim 1, wherein, The arc-shaped clamping surface of the clamping piece is covered with a rubber layer.

3. The test fixture of claim 1, wherein the plurality of test points are arranged in a pattern on the test board. The distance from one end of the arc-shaped clamping surface to the rotation axis is twice the distance from the other end of the arc-shaped clamping surface to the rotation axis.

4. The test fixture of claim 1, wherein the plurality of test points are arranged in a pattern on the test board. One end of the hinge is fixed relative to the clamping piece, the other end of the hinge penetrates through the substrate and is fixed with a first gear, the adjacent first gears constituting the short side of the rectangle directly mesh with each other or mesh with each other through a pair of first transition gears; the adjacent first gears constituting the long side of the rectangle mesh with each other through a pair of second transition gears.

5. The test fixture of claim 4, wherein the plurality of test points are arranged in a pattern on the test board. One of the first gears, the first transition gears or the second transition gears is provided with an operating handle.

6. The test tool for a circuit board as claimed in claim 4 or 5, wherein At least one of the first gears, the first transition gears or the second transition gears is provided with a locking pin, one end of the locking pin penetrates through a threaded hole on the gear and abuts against the substrate.

7. The test fixture of claim 4, wherein the plurality of test points are arranged in a pattern on the test board. One side of one of the first gears, the first transition gears or the second transition gears is provided with a driving gear meshing therewith, the driving gear is provided with an operating handle.

8. The test fixture of claim 7, wherein the plurality of test points are arranged in a pattern on the test board. The driving gear is provided with a locking pin, one end of the locking pin penetrates through a threaded hole on the driving gear and abuts against the substrate.

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