A circuit board vibration test fixture

Abstract

The utility model provides a kind of circuit board vibration test fixture, belong to tooling fixture technical field, fixture includes auxiliary mounting plate, fixed component and threaded rod;Using the fixture can improve the efficiency of circuit board environmental stress screening vibration test, fixed plate has multiple and can be assembled, multiple circuit board vibration test can be carried out once, experimental efficiency is high, solve the problem of low single test efficiency in prior art.Fixed component and auxiliary mounting plate are installed in transverse and longitudinal direction, a set of fixture can realize the vibration test of circuit board transverse and longitudinal direction.Auxiliary mounting plate is adapted with vibration table surface, and installation is simple;Clamp uses pressing plate and conventional bolt, and installation is simple, fast;Auxiliary mounting plate plate, fixed component can be used repeatedly, and fixture can be made in batches, when certain component is damaged, it can be directly replaced, and maintenance cost is low.

Description

Technical Field

[0001] This utility model belongs to the field of tooling and fixture technology, specifically relating to a circuit board vibration test fixture. Background Technology

[0002] Circuit boards are boards that carry various electronic components and enable the functions of electronic devices; they are the core components of electronic devices. After the circuit boards are manufactured, each one needs to undergo an environmental stress screening vibration test to verify whether the circuit board can achieve the expected design effect.

[0003] Existing vibration testing methods involve mounting circuit boards onto simple fixtures, allowing only one or two boards to be tested at a time. The number of boards tested depends on the size of the vibration table and the number of fixtures, resulting in low efficiency per test. For large orders, this is time-consuming and labor-intensive, making on-time delivery impossible. Furthermore, circuit boards require vibration testing in both the lateral and longitudinal directions, while existing vibration fixtures only support one direction, necessitating multiple repetitions to complete both lateral and longitudinal vibration tests. Utility Model Content

[0004] The purpose of this invention is to solve the problems of existing vibration fixtures having a small number of tests per run, low efficiency, and being time-consuming and labor-intensive, and to provide a circuit board vibration test fixture.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A circuit board vibration test fixture is provided, including an auxiliary mounting plate, a fixing assembly, and a threaded rod. Two auxiliary mounting plates are provided, each including a vertical portion and a horizontal portion forming an L-shape. The auxiliary mounting plate is mounted on the vibration table surface via the horizontal portion. The vertical portion has a first set of mounting holes in the horizontal direction and a second set of mounting holes in the vertical direction, with the first and second mounting holes coinciding after rotating 180° around the center of the vertical portion. The fixing assembly includes a clamping plate and a pressure plate. Four sets of mounting bosses and a third set of mounting holes are provided around one side surface of the clamping plate, with the third mounting holes corresponding one-to-one with the first mounting holes. The four sets of mounting bosses are symmetrically arranged in pairs along the length and width directions of the clamping plate. The mounting bosses include a low boss and a high boss, with the low boss having a first through hole. The high boss is provided with a first threaded hole, and the clamping plate is provided with a second through hole corresponding to the first through hole and the first threaded hole; the distance between the two sets of mounting bosses along the width direction of the clamping plate is greater than the width of the circuit board, and the distance between the two sets of mounting bosses along the length direction of the clamping plate is less than the length of the circuit board; the pressure plate is used to clamp and fix the two ends of the circuit board to the mounting bosses; the threaded rod selectively passes through the first mounting hole and the third mounting hole, or through the second mounting hole and the third mounting hole, so as to fix the fixing assembly parallel to the vertical part of the auxiliary mounting plate in the transverse or longitudinal direction; wherein, the fixing assembly is provided in multiple sets; the low boss on each clamping plate is aligned with the high boss on the adjacent clamping plate and connected by bolts, and the low boss located on the lowest clamping plate is fixedly connected to the vertical part of the auxiliary mounting plate by screws.

[0007] Furthermore, each set of fixing components is provided with four pressure plates, and every two pressure plates clamp the two ends of the circuit board respectively; the pressure plate is provided with a third through hole corresponding to the first through hole, and the bolt passes through the third through hole located above the circuit board, the third through hole located below the circuit board, the first through hole of the low boss, and the first threaded hole of the adjacent set of high bosses below in sequence, so that the pressure plate clamps the circuit board and fixes it on the clamping plate.

[0008] Furthermore, one of the two pressure plates located at the same end has a baffle in the middle, which is located on the side near the clamping plate and perpendicular to the pressure plate.

[0009] Furthermore, there are four third mounting holes, each located between two sets of mounting bosses; there are also four first mounting holes and four second mounting holes.

[0010] Furthermore, the vertical part of the auxiliary mounting plate is provided with second threaded holes corresponding to the first through hole in both the horizontal and vertical directions, so as to fix the low boss located at the bottom clamping plate to the vertical part of the auxiliary mounting plate in the horizontal or vertical direction by screws.

[0011] Furthermore, the high boss along the length of the clamping plate is located on one side of the low boss; after the clamping plate is rotated 180° along the vertical center, the high boss on it can be aligned with the low boss on the adjacent clamping plate.

[0012] Furthermore, the vertical portion of the auxiliary mounting plate has a mounting surface for mounting and fixing components and a reinforcing surface near the horizontal portion, with reinforcing ribs provided on the reinforcing surface and the horizontal portion.

[0013] Furthermore, the threaded rod has threads at both ends and a smooth round rod in the middle.

[0014] The advantages of this utility model are:

[0015] This utility model discloses a circuit board vibration testing fixture. Using this fixture improves the efficiency of environmental stress screening vibration testing of circuit boards. Multiple mounting plates are available and can be assembled, allowing for vibration testing of multiple circuit boards simultaneously, resulting in high experimental efficiency and solving the problem of low efficiency in single-test operations in existing technologies. The fixing components and auxiliary mounting plates are installed horizontally and vertically, enabling one fixture to perform both horizontal and vertical vibration tests on circuit boards. The auxiliary mounting plate is compatible with the vibration table surface, simplifying installation. The fixture uses pressure plates and conventional bolts, making installation simple and quick. The auxiliary mounting plates and fixing components are reusable, and the fixture can be manufactured in batches, allowing for direct replacement of damaged components, thus reducing maintenance costs. Attached Figure Description

[0016] The features and advantages of this invention will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0017] Figure 1 This is a schematic diagram of the longitudinal test installation of a circuit board vibration test fixture according to this utility model;

[0018] Figure 2 This is a front view of the auxiliary mounting plate of this utility model;

[0019] Figure 3 This is a top view of the auxiliary mounting plate of this utility model;

[0020] Figure 4 This is a front view of the circuit board assembled with a single fixed component of this utility model;

[0021] Figure 5 This is a front view of the circuit board assembled with multiple sets of fixing components according to this utility model;

[0022] Figure 6 This is a top view of the circuit board assembled with multiple sets of fixing components according to this utility model;

[0023] Figure 7 This is the main view of the clamping plate of this utility model;

[0024] Figure 8 This is a top view of the clamping plate of this utility model;

[0025] Figure 9 This is a schematic diagram of the structure of the threaded rod of this utility model;

[0026] Figure 10 This is a schematic diagram of the structure of the pressure plate of this utility model.

[0027] In the diagram: 1-Auxiliary mounting plate; 11-Reinforcing rib; 12-First mounting hole; 13-Second mounting hole; 2-Clamping plate; 21-Third mounting hole; 22-High boss; 23-Low boss; 3-Pressure plate; 31-Baffle; 4-Threaded rod; 5-Nut. Detailed Implementation

[0028] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0029] This utility model provides a circuit board vibration test fixture, such as Figure 1 As shown, it includes an auxiliary mounting plate 1, a fixing component, and a threaded rod 4.

[0030] like Figure 1 As shown, there are two auxiliary mounting plates 1, such as... Figure 2 , 3 As shown, the auxiliary mounting plate 1 includes a vertical part and a horizontal part that form an L-shaped structure. The auxiliary mounting plate 1 is mounted on the vibration table surface through the horizontal part. The vertical part has a set of first mounting holes 12 in the horizontal direction and a set of second mounting holes 13 in the vertical direction. The first mounting holes 12 and the second mounting holes 13 coincide after rotating 180° around the center of the vertical part.

[0031] like Figure 4 , 5 As shown in Figure 6, the fixing assembly includes a clamping plate 2 and a pressure plate 3; as Figure 7 , 8 As shown, four sets of mounting bosses and a third mounting hole 21 are provided around one side surface of the clamping plate 2. The third mounting hole 21 corresponds one-to-one with the first mounting hole 12. The four sets of mounting bosses are symmetrically arranged in pairs along the length and width directions of the clamping plate 2. The mounting bosses include a low boss 23 and a high boss 22. The low boss 23 is provided with a first through hole, and the high boss 22 is provided with a first threaded hole. The clamping plate 2 is provided with a second through hole corresponding to the first through hole and the first threaded hole. The distance between the two sets of mounting bosses along the width direction of the clamping plate 2 is greater than the width of the circuit board, and the distance between the two sets of mounting bosses along the length direction of the clamping plate 2 is less than the length of the circuit board. The pressure plate 3 is used to clamp and fix the two ends of the circuit board to the mounting bosses.

[0032] like Figure 1As shown, the threaded rod 4 passes through the first mounting hole 12 and the third mounting hole 21, or through the second mounting hole 13 and the third mounting hole 21, to fix the fixing assembly parallel to the vertical part of the auxiliary mounting plate 1 in the transverse or longitudinal direction.

[0033] like Figure 5 As shown, the fixing assembly consists of multiple sets; the low protrusion 23 on each clamping plate 2 is aligned with the high protrusion 22 on the adjacent clamping plate 2 and connected by bolts. The low protrusion 23 of the lowest clamping plate 2 is fixedly connected to the vertical part of the auxiliary mounting plate 1 by screws. Multiple sets of fixing assemblies can be assembled to improve the efficiency of circuit board vibration testing, and the combined fixing assembly allows for observation of the circuit board's condition during the test.

[0034] This embodiment provides a circuit board vibration testing fixture. Using this fixture improves the efficiency of environmental stress screening vibration testing of circuit boards. Multiple mounting plates are available and can be assembled, allowing for vibration testing of multiple circuit boards simultaneously, resulting in high experimental efficiency and solving the problem of low efficiency in single-test operations in existing technologies. The fixing components and auxiliary mounting plate 1 are installed horizontally and vertically, enabling one fixture to perform both horizontal and vertical vibration tests on the circuit board. The auxiliary mounting plate 1 is compatible with the vibration table surface, making installation simple. The fixture uses pressure plates 3 and conventional bolts, making installation simple and quick. The auxiliary mounting plate 1 and fixing components are reusable, and the fixture can be manufactured in batches. When a component is damaged, it can be directly replaced, resulting in low maintenance costs.

[0035] In this embodiment, most of the fixture components are made of aluminum, which reduces the weight and cost of the entire fixture.

[0036] like Figure 5 , 6 As shown, each set of fixing components has four pressure plates 3, and every two pressure plates 3 clamp both ends of the circuit board. The pressure plates 3 have third through holes corresponding to the first through holes. Bolts pass sequentially through the third through hole located above the circuit board, the third through hole located below the circuit board, the first through hole of the low boss 23, and the first threaded hole of the adjacent set of high bosses 22 below, so that the pressure plates 3 clamp the circuit board and fix it to the clamping plate 2. Spring washers are provided on the bolts between the two pressure plates 3 to improve the tightness of the two pressure plates 3 on the circuit board.

[0037] like Figure 10 As shown, a baffle 31 is provided in the middle of one of the two pressure plates 3 located at the same end. The baffle 31 is disposed on the side near the clamping plate 2 and perpendicular to the pressure plate 3. In this embodiment, the baffle 31 is integrally formed with the pressure plate 3 to prevent the circuit board from slipping between the two clamping plates 2 during vibration and damaging the circuit board.

[0038] like Figure 1 , 6As shown, a set of three mounting holes 21 has four holes, each located between two sets of mounting bosses; the first mounting holes 12 and the second mounting holes 13 also have four holes. This allows the fixing components to be more securely mounted on the auxiliary mounting plate 1.

[0039] like Figure 1 , 3 As shown, the vertical part of the auxiliary mounting plate 1 is provided with second threaded holes corresponding to the first through hole in the horizontal and vertical directions, so as to fix the low boss 23 located at the bottom clamping plate 2 to the vertical part of the auxiliary mounting plate 1 by screws in the horizontal or vertical direction.

[0040] like Figure 4 , 5 As shown, in each set of mounting bosses, the high boss 22 along the length of the clamping plate 2 is located to the right of the low boss 23; after the clamping plate 2 is rotated 180° along its vertical center, the high boss 22 on it can be aligned with the low boss 23 on the adjacent clamping plate 2; as shown Figure 6 As shown, in two adjacent sets of fixing components, one set of high protrusions 22 is located to the left of the low protrusions 23, and the other set of high protrusions 22 is located to the right of the low protrusions 23, so that the high protrusions 22 can be aligned and installed with the other set of low protrusions 23, thus saving the height of the fixing components to the maximum extent.

[0041] like Figure 2 As shown, the vertical part of the auxiliary mounting plate 1 has a mounting surface for mounting and fixing components and a reinforcing surface near the horizontal part. The reinforcing surface and the horizontal part are provided with reinforcing ribs 11 to increase the strength of the entire clamp.

[0042] like Figure 9 As shown, the threaded rod 4 has threads at both ends and a smooth round rod in the middle. The threaded section is used to mate with the nut 5 to mount the entire fixing assembly on the auxiliary mounting plate 1. The smooth round rod section makes the contact surface between the fixing assembly and the threaded rod 4 smoother, facilitating installation, etc.

[0043] The working process of the fixture is as follows:

[0044] like Figure 1 As shown, during the longitudinal vibration test:

[0045] (1) Place the circuit board between the two pressure plates 3, then align the two third through holes of the pressure plate 3 with the two first through holes of the low boss 23 on the clamping plate 2, and use bolts to pass through the pressure plate 3 from above;

[0046] (2) Fix the clamping plate 2 longitudinally to the second threaded hole reserved on the vertical mounting surface of the auxiliary mounting plate 1;

[0047] (3) Repeat step (1) and rotate it 180 degrees to fix the bolt in the first threaded hole of the high boss 22 in the clamping plate 2 in step 2;

[0048] (4) Repeat step (3) several times to assemble the fixed components;

[0049] (5) Take out another auxiliary mounting plate 1 and fit it against the high boss 22 on the outermost fixing component, so that the second mounting hole 13 on the two auxiliary mounting plates 1 is aligned with the third mounting hole 21 on the fixing component. Pass the threaded rod 4 through and fix it from both sides with the nut 5.

[0050] (6) Finally, fix the auxiliary mounting plate 1 to the tabletop.

[0051] During transverse vibration testing:

[0052] (1) Place the circuit board between the two pressure plates 3, then align the two third through holes of the pressure plate 3 with the two first through holes of the low boss 23 on the clamping plate 2, and use bolts to pass through the pressure plate 3 from above;

[0053] (2) Fix the clamping plate 2 horizontally onto the second threaded hole reserved on the vertical mounting surface of the auxiliary mounting plate 1;

[0054] (3) Repeat step (1) and rotate it 180 degrees to fix the bolt in the first threaded hole of the high boss 22 in the clamping plate 2 in step 2;

[0055] (4) Repeat step (3) several times to assemble the fixed components;

[0056] (5) Take out another auxiliary mounting plate 1 and fit it against the high boss 22 on the outermost fixing component, so that the first mounting hole 12 on the two auxiliary mounting plates 1 is aligned with the third mounting hole 21 on the fixing component. Pass the threaded rod 4 through and fix it from both sides with the nut 5.

[0057] (6) Finally, fix the auxiliary mounting plate 1 to the tabletop.

[0058] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered as included within the protection scope of the present invention.

Claims

1. A circuit board vibration test fixture, characterized in that: include: Two auxiliary mounting plates (1) are provided. Each auxiliary mounting plate (1) includes a vertical part and a horizontal part that form an L-shaped structure. The auxiliary mounting plate (1) is mounted on the vibration table surface through the horizontal part. The vertical part has a set of first mounting holes (12) in the horizontal direction and a set of second mounting holes (13) in the vertical direction. The first mounting holes (12) and the second mounting holes (13) coincide after rotating 180° around the center of the vertical part. The fixing component includes a clamping plate (2) and a pressure plate (3); four sets of mounting bosses and a third mounting hole (21) are provided around one side surface of the clamping plate (2), the third mounting hole (21) corresponds one-to-one with the first mounting hole (12), and the four sets of mounting bosses are symmetrically arranged in pairs along the length and width directions of the clamping plate (2); the mounting bosses include a low boss (23) and a high boss (22), the low boss (23) is provided with a first through hole, the high boss (22) is provided with a first threaded hole, and the clamping plate (2) is provided with a second through hole corresponding to the first through hole and the first threaded hole; The distance between the two sets of mounting bosses along the width direction of the clamping plate (2) is greater than the width of the circuit board, and the distance between the two sets of mounting bosses along the length direction of the clamping plate (2) is less than the length of the circuit board; the pressure plate (3) is used to clamp and fix the two ends of the circuit board to the mounting bosses; A threaded rod (4) is selected to pass through a first mounting hole (12) and a third mounting hole (21), or through a second mounting hole (13) and a third mounting hole (21), to fix the fixing assembly parallel to the vertical part of the auxiliary mounting plate (1) in the transverse or longitudinal direction; The fixing components are provided in multiple sets; the low boss (23) on each clamping plate (2) is aligned with the high boss (22) on the adjacent clamping plate (2) and connected by bolts; the low boss (23) of the lowest clamping plate (2) is fixedly connected to the vertical part of the auxiliary mounting plate (1) by screws.

2. The circuit board vibration test fixture according to claim 1, characterized in that: Each set of fixing components is provided with four pressure plates (3), and every two pressure plates (3) clamp the two ends of the circuit board respectively; The pressure plate (3) is provided with a third through hole corresponding to the first through hole. The bolt passes through the third through hole located above the circuit board, the third through hole located below the circuit board, the first through hole of the low boss (23), and the first threaded hole of the adjacent set of high bosses (22) below, so that the pressure plate (3) clamps the circuit board and fixes it on the clamping plate (2).

3. The circuit board vibration test fixture according to claim 2, characterized in that: A baffle (31) is provided in the middle of one of the two pressure plates (3) located at the same end. The baffle (31) is provided on the side near the clamping plate (2) and is perpendicular to the pressure plate (3).

4. The circuit board vibration test fixture according to claim 1, characterized in that: A set of three mounting holes (21) is provided with four holes, each of the three mounting holes (21) being located between two sets of mounting bosses; the first mounting hole (12) and the second mounting hole (13) are also provided with four holes.

5. The circuit board vibration test fixture according to claim 1, characterized in that: The vertical part of the auxiliary mounting plate (1) is provided with second threaded holes corresponding to the first through hole in the horizontal and vertical directions, so as to fix the low boss (23) of the lowest clamping plate (2) to the vertical part of the auxiliary mounting plate (1) by screws in the horizontal or vertical direction.

6. The circuit board vibration test fixture according to claim 1, characterized in that: The high boss (22) along the length of the clamping plate (2) is located on one side of the low boss (23); after the clamping plate (2) is rotated 180° along the vertical center, the high boss (22) on it can be aligned with the low boss (23) on the adjacent clamping plate (2).

7. The circuit board vibration test fixture according to claim 1, characterized in that: The vertical part of the auxiliary mounting plate (1) has a mounting surface for mounting and fixing components and a reinforcing surface near the horizontal part, and the reinforcing surface and the horizontal part are provided with reinforcing ribs (11).

8. The circuit board vibration test fixture according to claim 1, characterized in that: The threaded rod (4) has threads at both ends and a smooth round rod in the middle.

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