Mechanical test fixture for electronic devices
By designing a multi-faceted cubic fixture and a rounded corner structure, the problem of insufficient loading capacity of existing fixtures was solved, enabling efficient batch mechanical testing of electronic components, reducing the risk of device damage, and improving testing efficiency and data reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NO 24 RES INST OF CETC
- Filing Date
- 2025-09-11
- Publication Date
- 2026-07-31
AI Technical Summary
Existing fixtures are difficult to load a large number of devices simultaneously when conducting batch mechanical tests on electronic components, resulting in low testing efficiency and the devices being easily damaged by non-testing factors during the test.
Design a multi-faceted cubic fixture with a recessed groove on each face and a rectangular array of placement slots. Combined with a rounded corner structure, it can achieve full-load loading. The cover plate is fixed by screws to ensure that the device is not scratched or impacted during the test.
It increases the single loading capacity, reduces repetitive operations, ensures the continuity of the test process, reduces the risk of device damage, and improves testing efficiency and data reliability.
Smart Images
Figure CN224575495U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of electronic device testing technology, specifically relating to a mechanical testing fixture for electronic devices. Background Technology
[0002] Vibration and shock tests are essential components of environmental stress screening and reliability testing for electronic components. To verify whether electronic components can withstand severe vibration or shock, they must be placed on mechanical testing equipment for evaluation.
[0003] Surface mount devices (SMD packages) and chip-scale packaged devices (CSP packages) in electronic components are small in size and flat in shape, and most of them have no exposed leads. In mass production and quality inspection, the number of devices that need to be tested by mechanical tests is extremely large (a single test often needs to examine dozens to hundreds of devices). However, existing fixtures can only load a small number of devices at a time, which is difficult to meet the needs of batch testing, resulting in low testing efficiency. Utility Model Content
[0004] In view of the technical problems existing in the prior art, this utility model provides a mechanical testing fixture for electronic devices.
[0005] To achieve the above objectives, the present invention adopts the following technical solution:
[0006] A mechanical testing fixture for electronic devices includes a multi-faceted fixture body, a plurality of placement slots disposed on each face of the multi-faceted fixture body for placing devices, and a plurality of cover plates. The plurality of cover plates are detachably connected to each face of the multi-faceted fixture body in a one-to-one correspondence. When the cover plate is connected to the multi-faceted fixture body, the cover plate can cover all the placement slots.
[0007] Furthermore, each face of the multifaceted clamp body has a recessed groove, which is formed by the indentation of the corresponding outer surface of the multifaceted clamp body towards the interior of the multifaceted clamp body. The bottom plane of each recessed groove is defined as a setting surface for arranging the placement groove. Several placement grooves are distributed at intervals on each setting surface, and the opening of the placement groove is aligned with the opening direction of the corresponding recessed groove.
[0008] Furthermore, the area on each side of the multifaceted clamp body where the sink groove is not provided is defined as a holding area. When the cover plate is connected to the setting surface of the corresponding side of the multifaceted clamp body and completely covers all the placement grooves on that surface, the height of the outer surface of the cover plate is lower than the top surface of the holding area at the adjacent position, so as to form a height difference between the outer surface of the cover plate and the top surface of the holding area.
[0009] Furthermore, the mounting surface is provided with a plurality of first screw holes arranged at intervals, and the cover plate is provided with a plurality of second screw holes whose positions correspond one-to-one with the first screw holes. The first screw holes and the second screw holes are fixed by bolts.
[0010] Furthermore, the multifaceted fixture body has a cubic structure.
[0011] Furthermore, all corners of the multifaceted fixture body are rounded.
[0012] Furthermore, all corners of the cover plate are rounded.
[0013] Furthermore, each corner of the placement groove is provided with a rounded corner recess that is recessed in a direction away from the geometric center of the placement groove. The rounded corner recess is recessed in a direction away from the center of the placement groove. An arc-shaped protrusion is formed between every two adjacent rounded corner recesses. The protrusion is formed by the groove wall of the placement groove protruding horizontally in a direction close to the geometric center of the placement groove.
[0014] Furthermore, the placement slots are arranged in a rectangular array on the end face of the corresponding multifaceted fixture body.
[0015] In summary, the beneficial effects of this utility model are as follows: 1. Increased single-load capacity and reduced repetitive operations. The fixture adopts a cubic multi-faceted structure (6 mutually perpendicular rectangular faces), with each face designed with a recessed groove and a rectangular array of placement slots arranged within the recessed groove, achieving "full-load" loading. Compared with traditional fixtures with single-face placement, it can load dozens to hundreds of SMD / CSP devices at a time, directly matching the batch testing quantity requirements. There is no need for multiple batches of fixture loading and unloading, or equipment start-up and shutdown, significantly reducing repetitive operations and shortening the single-batch testing time, making it particularly suitable for quality screening scenarios in large-scale mass production. 2. Convenient multi-face switching without adjusting equipment parameters. After completing the test on a single face, simply rotating the cubic multi-faceted fixture body is sufficient to switch the test face, without needing to readjust parameters such as the platform positioning and stress application angle of the mechanical testing equipment. Devices on all faces bear the same mechanical stress under the same equipment parameters, avoiding efficiency losses caused by multiple batch adjustments, while ensuring the continuity of the testing process and further improving overall testing efficiency. 3. The recessed slot "embeds" the device into the multi-faceted fixture body. The slot wall isolates the device from external scratches and impacts, avoiding device damage caused by "non-testing factors" (such as package scratches and pin bending) before / during the test. The rounded corners of the slot provide a spacious space for device removal. The rounded corners of the cover plate and the multi-faceted fixture body reduce collision damage during disassembly and assembly, and reduce fixture deformation. Attached Figure Description
[0016] Figure 1This is a structural schematic diagram of a mechanical testing fixture for electronic devices provided by this utility model.
[0017] Figure 2 yes Figure 1 A three-dimensional structural diagram of the multi-faceted fixture body.
[0018] Figure 3 yes Figure 2 The front view.
[0019] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.
[0020] In the figure, 100-multifaceted fixture body, 110-sunken groove, 111-setting surface, 120-pressing area, 200-cover plate, 210-second screw hole, 300-placement groove, 310-rounded corner recess, 320-protrusion, 400-first screw hole. Detailed Implementation
[0021] The present invention will be further illustrated below with reference to specific figures.
[0022] Please see Figure 1 This utility model provides a mechanical testing fixture for electronic devices, including a multi-faceted fixture body 100, a plurality of placement slots 300 disposed on each face of the multi-faceted fixture body 100 for placing devices, and a plurality of cover plates 200. The cover plates 200 are detachably connected to each face of the multi-faceted fixture body 100. When the cover plate 200 is connected to the multi-faceted fixture body 100, the cover plate 200 can cover all placement slots 300. A batch of SMD packaged devices or CSP packaged devices are placed one by one in the placement slots 300, and then the cover plates 200 are installed to cover and protect the devices. Then, the multi-faceted fixture body 100 is fixed on the table of the mechanical testing equipment. The fixture is subjected to mechanical stress for testing. After the tested face is tested, the multi-faceted fixture body 100 is rotated to change the tested face. Each face is subjected to the same mechanical stress for testing in sequence in the aforementioned manner. After the test is completed, the cover plates 200 are removed and the electronic devices are taken out. Because each face of the multi-faceted fixture body 100 is equipped with several placement slots 300, it can hold more electronic devices to be tested at once compared to traditional fixtures with placement slots 300 on only one face, reducing the number of fixture loading and unloading operations and the number of test equipment start-ups and shutdowns. The integrated multi-faceted structure design eliminates the need for multiple independent fixtures, reducing fixture storage and management costs, while also lowering the complexity of manual operation. Changing the test face only requires rotating the fixture, significantly shortening the test time for a single batch, making it particularly suitable for quality inspection scenarios in large-scale mass production.
[0023] The multifaceted fixture body 100 has a cubic structure, consisting of six mutually perpendicular rectangular faces. Its overall mechanical structure is symmetrical and stable, and it can evenly distribute stress when subjected to mechanical stresses such as vibration and impact (avoiding localized stress concentration that could lead to fixture deformation). Compared to asymmetric polyhedra (such as pentahedrons and heptahedrons), the cube has higher edge and face-to-face connection strength, effectively preventing discrepancies between the actual stress on the device and the set stress due to fixture deformation, thus ensuring the accuracy and reliability of test data.
[0024] All edges and corners of the multi-faceted fixture body 100 are rounded. By replacing sharp right angles with smooth arcs, the rounded corner structure eliminates the safety hazard of sharp edges. Even if an operator accidentally comes into contact with a corner, the smooth arc surface can disperse the contact pressure, preventing direct cuts or scratches to the skin, significantly reducing the risk of personal injury during operation. This is especially suitable for batch testing scenarios involving high-frequency manual operations. Right-angled edges are prone to hard collisions with surrounding objects (such as the edge of the test bench, storage racks, and other tooling), which can cause minor issues like paint peeling and metal oxidation and rust, or even severe issues like edge deformation. Therefore, the arc surface of the rounded corner structure acts as a buffer against collision forces. During a collision, the arc surface makes surface contact with the object (rather than point contact at a right angle), which disperses the collision energy and reduces impact damage to the fixture's edges and corners.
[0025] Please see Figure 2Each face of the multifaceted fixture body 100 has a recessed groove 110, which is formed by a depression from the corresponding outer surface of the multifaceted fixture body 100 towards the interior of the multifaceted fixture body 100. The bottom plane of each recessed groove 110 is defined as a setting surface 111 for setting the placement slots 300. Several placement slots 300 are distributed at intervals on each setting surface 111. If the same number of placement slots 300 are designed on each face, the three-dimensional space of the cubic fixture can be maximized, directly meeting the requirement of "tens to hundreds of pieces for batch testing", and the loading of each face is uniform, avoiding space waste caused by some faces being idle. The opening of the placement slot 300 is aligned with the opening direction of the corresponding recessed groove 110. The recessed groove 110 retracts the mounting surface 111 of the placement groove 300 within the multi-faceted fixture body 100. The friction from the disassembly and assembly of the cover plate 200 mainly acts on the edge of the groove opening of the recessed groove 110 (rather than the outer surface of the multi-faceted fixture body 100), reducing the wear of the fixture. Simultaneously, the bottom mounting surface 111 is not directly exposed to the external environment, preventing dust, oil, and other impurities from accumulating directly within the placement groove 300, reducing the difficulty of cleaning the fixture and extending its service life. The recessed groove 110 "embeds" the device inside the multi-faceted fixture body 100 (rather than exposing it to the fixture surface), and its groove walls act like a "protective shell," isolating it from direct external impacts. Even if the fixture surface is slightly scratched, the impact will only be felt on the groove walls of the recessed groove 110, not the device itself, significantly reducing the probability of damage to the device before / during testing due to "non-testing factors" (such as scratches or impacts), and reducing unnecessary material waste.
[0026] The area on each side of the multi-faceted fixture body 100 without the recessed groove 110 is defined as the holding area 120. When the cover plate 200 is connected to the corresponding setting surface 111 of the multi-faceted fixture body 100 and completely covers all the placement grooves 300 on that surface, the height of the outer surface of the cover plate 200 is lower than the top surface of the adjacent holding area 120, thus forming a height difference between the outer surface of the cover plate 200 and the top surface of the holding area 120. On the mechanical testing equipment, the component held by the fixture on the table is held on the holding area 120, avoiding the cover plate 200. This allows the cover plate 200 to maintain a flat state for a long time without bearing additional holding force, ensuring its stable and reliable fixing effect on the device and reducing test interruptions or data deviations caused by damage to the cover plate 200. If the holding component presses directly onto the cover plate 200, the repeated clamping pressure can easily cause the edge of the cover plate 200 to warp and the surface to dent (especially plastic or thin metal materials), which will damage the fit and seal between the cover plate 200 and the setting surface 111. During the vibration test, the failure of the seal will cause the device to shake in the placement groove 300, resulting in uneven stress transmission.
[0027] The mounting surface 111 has several spaced-apart first screw holes 400, and the cover plate 200 has several second screw holes 210 whose positions correspond one-to-one with the first screw holes 400. The first screw holes 400 and the second screw holes 210 are fixed together by bolts. The screwed cover plate 200 is easy to install and remove and can be reused, which is suitable for the loading and unloading needs of batch components.
[0028] Each mounting surface 111 has several placement slots 300 arranged in a rectangular array. Along the length of the mounting surface 111, multiple placement slots 300 are arranged in a single row with equal spacing (the center-to-center distance between adjacent placement slots 300 is the same), forming several parallel rows of placement slots 300. Along the width of the mounting surface 111, multiple rows of placement slots 300 are also equally spaced (the center-to-center distance between adjacent rows of placement slots 300 is the same), and all rows of placement slots 300 are parallel and aligned, ultimately filling the entire mounting surface 111. This arrangement increases the number of placement slots 300 on each mounting surface 111 and achieves "full coverage" loading, doubling the number of devices per test. When loading devices in batches, operators need to quickly place dozens to hundreds of devices into the placement slots 300; the regularity of the rectangular array significantly reduces operational complexity.
[0029] Please see Figure 3 and Figure 4 Each corner of the placement groove 300 is provided with a rounded corner recess 310 that is recessed away from the geometric center of the placement groove 300. The rounded corner recess 310 is an arc-shaped recessed structure at the corner of the placement groove 300. The rounded corner recess 310 is recessed away from the center of the placement groove 300. Between every two adjacent rounded corner recesses 310, an arc-shaped protrusion 320 is formed. The protrusion 320 is formed by horizontally protruding from the groove wall of the placement groove 300 towards the geometric center of the placement groove 300. The rounded corner recesses 310 can provide a more spacious picking space, allowing operators to complete the picking action more quickly and smoothly.
[0030] One of the core functions of the cover plate 200 is to cover the placement slot 300 and ensure the stability of the device during testing. If the corners of the cover plate 200 are right angles, they are prone to deformation after long-term use (such as warping caused by impacts), which increases the gap between the cover plate 200 and the recessed slot 110. During vibration testing, this gap will cause the device to be subjected to additional airflow impacts, affecting the test data; during impact testing, the cover plate 200 may become loose. Therefore, all corners of the cover plate 200 are designed with rounded corners. The rounded corners reduce the risk of corner deformation, maintain the flatness of the cover plate 200 over a long period of time, ensure that the cover plate 200 and the recessed slot 110 of the fixture are always properly fitted, ensure the stability of the test environment, and improve the reliability of the data.
[0031] This mechanical testing fixture offers the following advantages: 1. Increased single-load capacity and reduced repetitive operations. The fixture employs a cubic multi-faceted structure (six mutually perpendicular rectangular faces). Each face features a recessed groove 110 and a rectangular array of placement slots 300 arranged within the recessed grooves 110, achieving "full-load" loading. Compared to traditional fixtures with single-face placement, it can load dozens to hundreds of SMD / CSP devices at a time, directly matching the batch testing requirements. It eliminates the need for multiple batches of fixture loading / unloading and equipment start / stop, significantly reducing repetitive operations and shortening single-batch testing time, making it particularly suitable for quality screening scenarios in large-scale mass production. 2. Convenient multi-face switching without adjusting equipment parameters. After completing the test on a single face, simply rotating the cubic multi-faceted fixture body 100 switches to the test face, eliminating the need to readjust parameters such as the mechanical testing equipment's table positioning and stress application angle. Devices on all faces experience the same mechanical stress under the same equipment parameters, avoiding efficiency losses caused by multiple batch adjustments, while ensuring the continuity of the testing process and further improving overall testing efficiency. 3. The recessed groove 110 "embeds" the device into the multi-faceted fixture body 100. The groove wall isolates the device from external scratches and impacts, avoiding damage to the device caused by "non-evaluation factors" before / during the test (such as package scratches and pin bending). The rounded corners of the placement groove 300 provide a spacious space for picking up and putting down electronic devices, making it convenient and quick. The rounded corners of the cover plate 200 and the multi-faceted fixture body 100 can reduce collision damage during disassembly and assembly, and reduce fixture deformation.
[0032] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structure made using the contents of this utility model specification and drawings, whether directly or indirectly applied to other related technical fields, shall also be within the patent protection scope of this utility model.
Claims
1. A mechanical test fixture for electronic devices, characterized by: The device includes a multi-faceted clamp body, several placement slots on each face of the multi-faceted clamp body for placing devices, and several cover plates. The cover plates are detachably connected to each face of the multi-faceted clamp body. When the cover plate is connected to the multi-faceted clamp body, the cover plate can cover all the placement slots.
2. The mechanical test fixture for electronic devices of claim 1, wherein: Each face of the multifaceted clamp body has a recessed groove. The recessed groove is formed by a depression from the corresponding outer surface of the multifaceted clamp body towards the interior of the multifaceted clamp body. The bottom plane of each recessed groove is defined as a setting surface for arranging the placement groove. Several placement grooves are distributed at intervals on each setting surface. The opening of the placement groove is aligned with the opening direction of the corresponding recessed groove.
3. The mechanical test fixture for electronic devices of claim 2, wherein: The area on each side of the multifaceted clamp body where the sink groove is not provided is defined as a holding area. When the cover plate is connected to the setting surface of the corresponding side of the multifaceted clamp body and completely covers all the placement grooves on that surface, the height of the outer surface of the cover plate is lower than the top surface of the holding area at the adjacent position, so as to form a height difference between the outer surface of the cover plate and the top surface of the holding area.
4. The mechanical test fixture for electronic devices of claim 2, wherein: The mounting surface is provided with a plurality of first screw holes arranged at intervals, and the cover plate is provided with a plurality of second screw holes whose positions correspond one-to-one with the first screw holes. The first screw holes and the second screw holes are fixed by bolts.
5. The mechanical test fixture for electronic devices of claim 1, wherein: The multifaceted fixture body has a cubic structure.
6. The mechanical test fixture for electronic devices of claim 1, wherein: All corners of the multifaceted fixture body are rounded.
7. The mechanical test fixture for electronic devices of claim 1, wherein: All corners of the cover plate are rounded.
8. The mechanical test fixture for electronic devices of claim 1, wherein: Each corner of the placement groove is provided with a rounded corner recess that is recessed in a direction away from the geometric center of the placement groove. The rounded corner recess is recessed in a direction away from the center of the placement groove. An arc-shaped protrusion is formed between every two adjacent rounded corner recesses. The protrusion is formed by the groove wall of the placement groove protruding horizontally in a direction closer to the geometric center of the placement groove.
9. The mechanical test fixture for electronic devices according to any one of claims 1-8, wherein: The placement slots are arranged in a rectangular array on the end face of the corresponding multi-faceted fixture body.