Test fixture with product positioning function

Abstract

The utility model provides a test fixture with a product positioning function. The device comprises a lower plate module and an upper plate module, the lower plate module is provided with a signal adapter plate, a floating spring and a floating block equal-height screw, the signal adapter plate is provided with an elastic sheet needle group, the floating spring supports a floating block which floats above the elastic sheet needle group, the floating block equal-height screw penetrates through the floating block, the floating block is provided with a product groove, and the product groove is connected with the floating spring. The periphery of the product groove protrudes to form a positioning block, the positioning block is provided with a guide face inclining towards the interior of the product groove, the upper plate module is provided with a pressing plate piece used for pushing the floating block to descend, and the pressing plate piece is provided with a receding opening used for allowing the positioning block to enter; according to the utility model, when the power-on test is carried out on a product, false test of the product caused by the fact that the elastic sheet needle group cannot be contacted with a test point of the product can be avoided, the false test rate of the product can be reduced, and meanwhile, the elastic sheet needle group is prevented from being crushed by a convex part of the product and the insertion loss of the product caused by the elastic sheet needle group is also avoided; the utility model belongs to the technical field of trays.

Description

Technical Field

[0001] The utility model belongs to the technical field of trays, and in particular relates to a testing fixture with a product positioning function. Background Art

[0002] When performing performance testing on small electronic products, due to their small size, products placed in the carrier may often shift during loading due to carrier vibration, feeding mechanism vibration, or worker fatigue. This may cause the product to not be completely placed in a specific position in the carrier, making it impossible for the probe to contact the product, resulting in poor product misdetection or a high product misdetection rate. The probe assembly may even be crushed by the product or the product may be damaged by the probe. Utility Model Content

[0003] The purpose of the present invention is to provide a test fixture with a product positioning function to solve the technical defects described in the background art.

[0004] The test fixture with product positioning function includes a lower plate module and an upper plate module, the lower plate module is installed with a signal adapter plate, a floating spring and a floating block and contour screws, a spring pin group is provided on the signal adapter plate, the floating spring supports a floating block floating above the spring pin group, the floating block and contour screws pass through the floating block, the floating block is provided with a product slot, when the floating block descends, the spring pin group penetrates into the product slot and contacts the product to be energized, the peripheral protrusion of the product slot is provided with a positioning block, the positioning block is provided with a guide surface inclined toward the product slot, the upper plate module is provided with a pressure plate component for pushing the floating block down, and the pressure plate component is provided with an avoidance opening for allowing the positioning block to enter.

[0005] According to the technical solution, the utility model can achieve the following beneficial effects:

[0006] 1. When the product is placed in the product slot by the feeding mechanism or manually, the positioning block guides the product into the product slot through the guide surface inclined toward the product slot, so that the conductive point of the product is aligned with the spring needle group. This can avoid the spring needle group and the test point of the product from not contacting each other during the power-on test, thus preventing the product from being mis-tested and reducing the product mis-test rate. At the same time, it can also prevent the spring needle group from being crushed by the protruding part of the product and causing insertion damage to the product.

[0007] 2. When testing the product, the power module on the test device drives the upper plate module to descend, and the upper plate module drives the pressure plate to descend. The pressure plate contacts the floating block and pushes the floating block down. At this time, the spring needle group penetrates into the product slot and contacts the product to energize, thereby testing the product. Therefore, during the period when the product is not being tested, that is, when placing the product into the product slot, taking the product out of the product slot, and adjusting the product position, the spring needle group does not contact the product, thereby protecting the spring needle group and preventing the spring needle group from wearing the product;

[0008] 3. When the pressure plate is in contact with the floating block, the positioning block enters the avoidance opening, so that the pressure plate can stably push the floating block down horizontally.

[0009] In order to further optimize the above technical solution, it can be optionally combined with one or more of the following implementation methods without conflict.

[0010] In some embodiments, when the product is placed in the product slot, the top of the product is higher than the product slot, and the pressing plate is provided with a product opening for being sleeved onto the top of the product. The top wall of the product opening is provided with an anti-scratch layer that contacts the top of the product and can push the product down. The periphery of the product opening can push the product to the center of the product slot.

[0011] According to the technical solution, when the four sides of the product are arc surfaces, after the pressure plate and the floating block are attached, the product mouth uses the peripheral part to push the product to the center of the product groove, so that the conductive point of the product is further aligned with the spring needle group. In addition, the product mouth is sleeved to the top of the product to fix the position of the product, so that the spring needle group can accurately contact the conductive point of the product and be energized.

[0012] In some embodiments, the lower plate module is equipped with a needle block. When the floating block descends, the top of the needle block can enter the product groove and contact and support the bottom of the product. The end of the spring needle group that contacts and is energized with the product is located at the top of the needle block.

[0013] According to the technical solution, after the spring needle assembly contacts the conductive point of the product, the product is supported by the top of the needle block, thereby preventing damage to the spring needle assembly due to excessive downward pressure on the product.

[0014] In some embodiments, the top of the needle block is provided with an oblique guide portion located around the spring needle group and facing the spring needle group, and the oblique guide portion is used to guide the conductive point of the product to align with the spring needle group;

[0015] According to the technical solution, when the spring needle group penetrates the product slot and contacts the product to be energized, the inclined guide part can push the product to move, so that the product can be adjusted in position for the second time, thereby further ensuring that the conductive point of the product is aligned with the spring needle group.

[0016] In some embodiments, the top of the spring needle assembly is provided with an inclined portion for inserting into the conductive point of the product;

[0017] According to the technical solution, the risk of the spring pin group being crushed when it contacts the conductive point of the product is reduced. At the same time, the contact area between the spring pin group and the conductive point of the product can be increased, while the contact impedance is reduced, so as to improve the test stability and test yield.

[0018] In some embodiments, the top end of the spring needle assembly passes through the needle block and can slide within the needle block, so that the needle block restricts the vertical rise and fall of the spring needle assembly;

[0019] According to the technical solution, when the spring needle assembly is pressed down by the product, it can ensure that the spring needle assembly rises and falls vertically, thereby preventing the spring needle assembly from being deformed and shifted.

[0020] In some embodiments, the signal transfer board is equipped with a static electricity extraction needle that passes through the needle block and contacts the product. After the floating block descends, the static electricity extraction needle is in contact with the product in advance.

[0021] According to the technical solution, before the product is powered on for testing, static electricity can be discharged from the product using an electrostatic lead-out needle, thereby preventing the product from being damaged.

[0022] In some embodiments, the lower plate module is mounted with a boss mounting plate, the boss mounting plate is mounted with a product positioning column and an upper spring, the product positioning column penetrates into the product slot and contacts the product, and the upper spring supports a floating boss, the top of the floating boss is located in the product slot to lift the product;

[0023] According to the technical solution, after the product is placed in the product slot, it is necessary to press the product down so that the conductive point of the product can contact the spring needle group and be energized, thereby further protecting the spring needle group.

[0024] In some embodiments, the upper plate module is installed with a guide sleeve and a pressure plate height screw, the pressure plate member is fixed to the bottom end of the pressure plate height screw, a buffer spring is provided between the pressure plate member and the upper plate module, and the pressure plate member is installed with a guide column passing through the guide sleeve;

[0025] According to the technical solution, when the pressure plate pushes the floating block down, the buffer spring can buffer the impact force at the moment the pressure plate and the floating block contact, and at the same time, can also buffer the downward force when the pressure plate excessively presses the floating block.

[0026] In some embodiments, the lower plate module is provided with a positioning hole, and the pressing plate member is provided with a positioning post for entering the positioning hole;

[0027] According to the technical solution, after the pressure plate and the floating block are attached, the positioning post enters the positioning hole so that the avoidance opening can be aligned with the positioning block and the product opening can be aligned with the product groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation of the present invention, the following is a brief description of the drawings and reference numerals required to be used in the description of the specific implementation.

[0029] Figure 1 It is a structural diagram of the utility model;

[0030] Figure 2 This is a structural diagram of the lower plate module of the utility model;

[0031] Figure 3 It is a structural schematic diagram of the needle block of the utility model;

[0032] Figure 4 It is a cross-sectional view of the position of the floating block of the utility model;

[0033] Figure 5 It is a cross-sectional view of the location of the floating boss of the utility model;

[0034] Figure 6 This is a schematic diagram of the bottom structure of the upper plate module of the present invention;

[0035] Figure 7 This is a cross-sectional view of the upper plate module of the present invention;

[0036] Figure 8 This is a schematic diagram of the operation of the utility model when the inclined portion contacts the product and is energized.

[0037] Reference numerals:

[0038] 1. Lower plate module; 11. Floating spring; 12. Floating block and contour screws; 13. Floating block; 14. Product slot; 15. Positioning block; 16. Guide surface; 17. Positioning hole; 2. Signal adapter board; 21. Needle block; 22. Shrapnel needle assembly; 221. Inclined portion; 23. Oblique guide portion; 24. Electrostatic lead-out needle; 3. Boss mounting plate; 31. Product positioning column; 32. Top spring; 33. Floating boss; 4. Upper plate module; 41. Pressure plate and contour screws; 42. Buffer spring; 43. Guide sleeve; 44. Guide column; 45. Pressure plate component; 46. Avoidance port; 47. Product port; 48. Anti-scratch layer; 49. Positioning column. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with specific implementation methods and with reference to the accompanying drawings.

[0040] like Figures 1 to 8As shown, this specific embodiment provides a test fixture with a product positioning function, which includes a lower plate module 1 and an upper plate module 4.

[0041] The lower plate module 1 is installed with a floating spring 11 , a floating block equal height screw 12 , a signal adapter plate 2 and a boss mounting plate 3 ; the lower plate module 1 is provided with a positioning hole 17 .

[0042] The floating spring 11 supports a floating block 13 floating above the signal adapter board 2. The floating block equal height screw 12 passes through the floating block 13. The floating block 13 is provided with a product slot 14. The peripheral protrusion of the product slot 14 is provided with a positioning block 15. The positioning block 15 is provided with a guide surface 16 inclined toward the product slot 14. When the product is placed in the product slot 14, the top of the product is higher than the product slot 14.

[0043] The signal adapter board 2 is equipped with a spring needle group 22, a needle block 21 and an electrostatic lead-out needle 24. The end of the spring needle group 22 that contacts the product and is energized is located at the top of the needle block 21. The top of the spring needle group 22 passes through the needle block 21 and can slide inside the needle block 21, so that the needle block 21 limits the vertical rise and fall of the spring needle group 22. The top of the spring needle group 22 is provided with an inclined portion 221 for inserting the conductive point of the product. The spring needle group 22 can be a bow-shaped copper sheet. The electrostatic lead-out needle 24 passes through the needle block 21 and contacts the product; when the floating block 13 descends, the electrostatic lead-out needle 24 contacts the product in advance. Thereafter, the top of the needle block 21 can enter the product slot 14 and contact the bottom of the product for support. The spring needle group 22 penetrates the product slot 14 and contacts the product and is energized; the top of the needle block 21 is provided with an inclined guide portion 23 located around the spring needle group 22 and facing the spring needle group 22. The inclined guide portion 23 is used to guide the conductive point of the product to align with the spring needle group 22.

[0044] The boss mounting plate 3 is installed with a product positioning column 31 and an upper push spring 32. The product positioning column 31 penetrates into the product groove 14 and contacts the product. The upper push spring 32 supports a floating boss 33. The top of the floating boss 33 is located in the product groove 14 to lift the product.

[0045] The upper plate module 4 is installed with a guide sleeve 43 and a pressure plate contour screw 41, and the bottom end of the contour screw is fixed with a pressure plate component 45, which is used to push the floating block 13 down, and a buffer spring 42 is arranged between the pressure plate component 45 and the upper plate module 4, and the pressure plate component 45 is installed with a positioning column 49 and a guide column 44, the positioning column 49 is used to enter the positioning hole 17, and the guide column 44 passes through the guide sleeve 43; the pressure plate component 45 is provided with an avoidance port 46 and a product port 47, the avoidance port 46 is used to allow the positioning block 15 to enter, and the product port 47 is used to be mounted on the top of the product, and the top wall of the product port 47 is provided with an anti-scratch layer 48 that contacts the top of the product and can push the product down, and the periphery of the product port 47 can push the product to the center of the product groove 14.

[0046] The following is the working process of the test fixture described in this specific embodiment:

[0047] The product can be placed in the product slot 14 through the loading mechanism or manually. When the product is placed in the product slot 14, the positioning block 15 guides the product into the product slot 14 through the guide surface 16 inclined toward the product slot 14, so that the conductive point of the product is initially aligned with the spring needle group 22; thereafter, the upper plate module 4 is driven down by the power module, and the upper plate module 4 drives the pressure plate member 45 to descend. At this time, the positioning column 49 enters the positioning hole 17, and the positioning block 15 enters the avoidance opening 46, so that the product opening 47 is aligned with the product slot 14; thereafter, the pressure plate member 45 is attached to the floating block 13. At this time, the product opening 47 is sleeved to the top of the product and the product opening 47 uses the peripheral part to push the product to the center of the product slot 14 to position the product. The sheet needle group 22 is further aligned with the conductive point of the product; thereafter, the pressure plate 45 pushes the floating block 13 down, so that the top of the needle block 21 enters the product groove 14, and the inclined guide portion 23 of the needle block 21 pushes the product to move, so that the product is adjusted for the second time. At the same time, the anti-scratch layer 48 on the top wall of the product opening 47 contacts the top of the product, and the top wall of the product opening 47 pushes the product down to fix the product, while the floating boss 33 is pressed down by the product. As the floating boss 33 is lower than the product positioning column 31, the product positioning column 31 re-positions the descending product; thereafter, the static electricity lead-out needle 24 contacts the product in advance to discharge static electricity for the product, and then the spring needle group 22 contacts the conductive point of the product and energizes it, thereby testing the product.

[0048] After completing the product test, the power module drives the upper plate module 4 to rise and reset, and the plate module drives the pressure plate component 45 to rise and reset. At this time, the pressure plate component 45 is separated from the floating block 13; thereafter, the floating spring 11 pushes the floating block 13 to rise and reset. At this time, the needle block 21, the spring needle group 22 and the electrostatic lead-out needle 24 all descend and move out of the product slot 14; thereafter, the tested product can be taken out of the product slot 14.

Claims

1. A test fixture with a product positioning function, comprising a lower plate module (1) and an upper plate module (4), characterized in that: The lower plate module (1) is installed with a signal transfer plate (2), a floating spring (11) and a floating block height screw (12); a spring needle group (22) is provided on the signal transfer plate (2); the floating spring (11) supports a floating block (13) floating above the spring needle group (22); the floating block height screw (12) passes through the floating block (13); the floating block (13) is provided with a product slot (14); when the floating block (13) descends The spring needle group (22) penetrates into the product groove (14) and contacts the product to be energized. A positioning block (15) is protruded on the periphery of the product groove (14). The positioning block (15) is provided with a guide surface (16) inclined toward the inside of the product groove (14). The upper plate module (4) is provided with a pressure plate (45) for pushing the floating block (13) down. The pressure plate (45) is provided with an avoidance opening (46) for allowing the positioning block (15) to enter.

2. The test fixture with product positioning function according to claim 1, characterized in that: When the product is placed in the product slot (14), the top of the product is higher than the product slot (14), the pressing plate (45) is provided with a product opening (47) for being sleeved on the top of the product, the top wall of the product opening (47) is provided with an anti-scratch layer (48) that contacts the top of the product and can push the product down, and the periphery of the product opening (47) can push the product to the center of the product slot (14).

3. The test fixture with product positioning function according to claim 1, characterized in that: The lower plate module (1) is equipped with a needle block (21). When the floating block (13) descends, the top of the needle block (21) can enter the product groove (14) and contact and support the bottom of the product. The end of the spring needle group (22) that contacts and is energized with the product is located at the top of the needle block (21).

4. The test fixture with product positioning function according to claim 3, characterized in that: The top of the needle block (21) is provided with an oblique guide portion (23) located around the spring needle group (22) and facing the spring needle group (22), and the oblique guide portion (23) is used to guide the conductive point of the product to be aligned with the spring needle group (22).

5. The test fixture with product positioning function according to claim 4, characterized in that: The top end of the spring needle assembly (22) is provided with an inclined portion (221) for inserting into the conductive point of the product.

6. The test fixture with product positioning function according to claim 4, characterized in that: The top end of the spring needle group (22) passes through the needle block (21) and can slide inside the needle block (21), so that the needle block (21) limits the vertical lifting of the spring needle group (22).

7. The test fixture with product positioning function according to claim 3, characterized in that: The signal transfer board (2) is equipped with an electrostatic lead-out needle (24) that passes through the needle block (21) and contacts the product. After the floating block (13) descends, the electrostatic lead-out needle (24) contacts the product in advance.

8. The test fixture with product positioning function according to claim 2, characterized in that: The lower plate module (1) is installed with a boss mounting plate (3), and the boss mounting plate (3) is installed with a product positioning column (31) and an upper push spring (32). The product positioning column (31) penetrates into the product groove (14) and contacts the product. The upper push spring (32) supports a floating boss (33). The top of the floating boss (33) is located in the product groove (14) to lift the product.

9. The test fixture with product positioning function according to claim 1, characterized in that: The upper plate module (4) is installed with a guide sleeve (43) and a pressure plate equal height screw (41) mounted thereon, the pressure plate component (45) is fixed to the bottom end of the pressure plate equal height screw (41), a buffer spring (42) is provided between the pressure plate component (45) and the upper plate module (4), and the pressure plate component (45) is installed with a guide column (44) passing through the guide sleeve (43).

10. The test fixture with product positioning function according to claim 2, characterized in that: The lower plate module (1) is provided with a positioning hole (17), and the pressing plate member (45) is provided with a positioning column (49) for entering the positioning hole (17).

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