A test module and crimping fixture

Abstract

The present invention discloses a test module and a crimping jig, which belong to the field of display panel testing. The test module includes a mold core and a plurality of spring needles arranged in parallel and spaced apart; the top of the mold core has a needle tail groove, the bottom of the mold core has a avoidance protrusion, and the avoidance protrusion has a plurality of needle tip grooves; each spring needle includes a needle tail, a body, a needle arm and a needle tip connected in sequence from top to bottom, the needle arm is in a broken line shape, each needle tip and the corresponding needle tail are respectively inserted into the corresponding needle tip groove and the needle tail groove, each needle tip and each needle tail protrudes from the avoidance protrusion and the mold core respectively, and the body of each spring needle is against the side of the mold core. A test module provided by an embodiment of the present invention can not only realize the crimping of the pad point corresponding to the small screen in the middle of the silicon substrate, avoid the problem of the light-emitting area of ​​the screen being crushed, but also reduce production costs.

Description

Technical Field

[0001] The present invention belongs to the field of display panel testing, and more specifically, relates to a testing module and a crimping fixture. Background Art

[0002] With the rapid development of display technology, the requirements for circuit integration are becoming increasingly higher, the pad points of cell products are becoming smaller and smaller, and the testing difficulty is becoming increasingly greater.

[0003] Currently, the large silicon substrate corresponding to the end of the cell product includes multiple small screens. After the compression test, the large silicon substrate will be cut into multiple rows and columns of small screens. Each small screen has a screen light-emitting area and a pad point. There is a certain height difference between the screen light-emitting area and the pad point (that is, the thickness of the screen light-emitting area, for example: 0.5mm), and the pad point in the middle of the silicon substrate is located in the gap between two adjacent screen light-emitting areas (see Figure 1 and Figure 2 Furthermore, the tip of the spring needle in the test module must extend less than 0.5mm beyond the mold core to prevent bending and deformation. Therefore, the larger mold core cannot fit into the gap at the pad point corresponding to the small screen in the middle. To achieve crimped connection, the mold core often squeezes the screen's luminous area, causing damage. Summary of the Invention

[0004] In response to the above defects or improvement needs of the prior art, the present invention provides a test module and a crimping fixture, the purpose of which is not only to achieve the crimping of the pad points corresponding to the small screen in the middle of the silicon substrate, avoiding the problem of the screen's luminous area being crushed, but also to reduce production costs.

[0005] In a first aspect, the present invention provides a test module, the test module comprising a mold core and a plurality of spring pins arranged in parallel and spaced apart;

[0006] The top of the mold core is provided with a needle tail groove, the bottom of the mold core is provided with a position-avoiding protrusion, and the position-avoiding protrusion is provided with a plurality of needle tip grooves;

[0007] Each of the spring needles includes a needle tail, a body, a needle arm and a needle tip connected in sequence from top to bottom, and the needle arm is in a broken line shape. Each needle tip and the corresponding needle tail are respectively inserted into the corresponding needle tip groove and the needle tail groove, and each needle tip and each needle tail protrudes from the avoidance protrusion and the mold core respectively, and the body is against the side of the mold core.

[0008] Optionally, each needle arm includes a first transverse portion, a connecting portion and a second transverse portion connected in sequence, the first transverse portion is vertically connected to the body, the second transverse portion is vertically connected to the needle tip, the first transverse portion and the second transverse portion are arranged in parallel and spaced apart, and the second transverse portion is inserted in the corresponding needle tip groove.

[0009] Optionally, the outer peripheral walls of the main body, the first transverse portion and the connecting portion are all coated with an insulating layer.

[0010] Optionally, the needle tail is a U-shaped structure, one end of the needle tail is connected to the body, and the other end of the needle tail has a contact portion, and the contact portion protrudes from the mold core.

[0011] Optionally, the needle tail is provided with a locking boss, and the locking boss and the main body are respectively located on both sides of the mold core to clamp the mold core.

[0012] Optionally, the main body is provided with a limiting boss, and the limiting boss and the needle tail are arranged at intervals to clamp the mold core.

[0013] Optionally, a positioning platform is provided on one side of the mold core, the positioning platform is against the body, and the limiting boss and the needle tail are located on both sides of the positioning platform.

[0014] Optionally, the width of the avoidance protrusion in a direction parallel to the cross section of the spring needle is 0.7-1.5 mm.

[0015] In a second aspect, the present invention provides a crimping jig, comprising a base, a crimping head assembly, and the test module as described in the first aspect;

[0016] The base is provided with a PCB board and an FPC, the PCB board is provided with a signal input port, the PCB board and the FPC are connected, the pressure head assembly is located on the base, the mold core is located on the pressure head assembly, and the needle tails of each of the spring needles are connected to the FPC.

[0017] Optionally, the pressure head assembly includes a fixed seat and a floating platform, the fixed seat is located on the base, the floating platform is located below the fixed seat and is connected to the fixed seat through a spring, a height adjustment bolt is movably passed through the fixed seat, the top end of the height adjustment bolt has an outer flange to abut against the fixed seat, the bottom end of the height adjustment bolt is threaded with the floating platform, and the mold core is located on the floating platform.

[0018] The technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0019] For a test module provided by an embodiment of the present invention, since each needle tip and the corresponding needle tail are respectively inserted in the corresponding needle tip groove and needle tail groove, each needle tip and each needle tail protrudes from the avoidance protrusion and the mold core respectively, and the main body and the side of the mold core are abutted, thereby realizing the insertion arrangement of multiple spring needles in the mold core through the insertion of the needle tip and the needle tail.

[0020] Furthermore, the bottom of the mold core has a relief bump, and multiple needle tip grooves are located on the relief bump. This allows the relief bump and the needle tip to be inserted into the gap to achieve crimping of the pad point corresponding to the small screen located in the middle (the total length of the relief bump and the needle tip extending from the mold core is 0.5mm greater than the thickness of the screen's luminous area). At this time, the relief bump and the mold core will not squeeze the screen's luminous area. In addition, the needle tip groove in the relief bump can accommodate the needle tip. Although the needle tip is longer than that of conventional structures, it will not bend or deform because it is partially inserted into the relief bump. It can also ensure that the length of the needle tip extending from the relief bump is short (less than 0.5mm), meeting process requirements. In addition, since the needle tail, body, needle arm and needle tip are arranged in sequence from top to bottom along the crimping direction, and the needle arm is in a broken line shape, the broken line arrangement of the needle arm (including the extension in the horizontal direction and the downward direction) not only realizes the connection between the body and the needle tip, and facilitates the swing of the needle tip during the crimping process, but also can reduce the height of the needle tip in the crimping direction while keeping the length of the extended avoidance protrusion constant, thereby greatly reducing the length of the needle tip groove, which can reduce the processing difficulty of the avoidance protrusion and reduce the production cost.

[0021] That is to say, the test module provided by the embodiment of the present invention can not only realize the pressing of the pad points corresponding to the small screen in the middle of the silicon substrate, avoiding the problem of the screen's luminous area being crushed, but also reduce production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 1 is a schematic structural diagram of a silicon substrate provided by an embodiment of the present invention;

[0023] Figure 2 It is a partial side view of a silicon substrate provided by an embodiment of the present invention.

[0024] Figure 3 This is a schematic structural diagram of a test module provided by an embodiment of the present invention;

[0025] Figure 4 is a cross-sectional view of a test module provided by an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of the structure of the shrapnel needle provided by an embodiment of the present invention;

[0027] Figure 6This is a structural diagram of a crimping jig provided by an embodiment of the present invention;

[0028] Figure 7 It is a partial schematic diagram of the crimping jig provided in an embodiment of the present invention.

[0029] The symbols in the figure mean the following:

[0030] 1. Mold core; 11. Needle tail groove; 12. Avoidance protrusion; 13. Needle tip groove; 14. Positioning platform; 2. Spring pin; 21. Needle tail; 211. Contact part; 212. Positioning boss; 22. Main body; 221. Limiting boss; 23. Needle arm; 231. First horizontal part; 232. Connecting part; 233. Second horizontal part; 24. Needle tip; 3. Insulation layer; 4. Base; 41. PCB board; 42. FPC; 43. Connecting bolt; 5. Press head assembly; 51. Fixing seat; 52. Floating platform; 53. Height adjustment bolt; 54. Slide rail; 10. Test module; 100. Silicon substrate; 200. Screen luminous area; 300. Pad point. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely for the purpose of explaining the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0032] Figure 3 is a structural diagram of a test module provided by an embodiment of the present invention, Figure 4 This is a cross-sectional view of a test module provided by an embodiment of the present invention, combined with Figure 3 and Figure 4 As shown, the test module 10 includes a mold core 1 and a plurality of spring pins 2 arranged in parallel and spaced apart.

[0033] The top of the mold core 1 is provided with a needle tail groove 11 , the bottom of the mold core 1 is provided with a position-avoiding protrusion 12 , and the position-avoiding protrusion 12 is provided with a plurality of needle tip grooves 13 .

[0034] Figure 5 Schematic diagram of the structure of the shrapnel needle provided by the embodiment of the present invention, such as Figure 5 As shown, each shrapnel needle 2 includes a needle tail 21, a body 22, a needle arm 23 and a needle tip 24 connected in sequence from top to bottom. The needle arm 23 is in a broken line shape. Each needle tip 24 and the corresponding needle tail 21 are respectively inserted into the corresponding needle tip groove 13 and the needle tail groove 11. Each needle tip 24 and each needle tail 21 protrude from the avoidance protrusion 12 and the mold core 1 respectively, and the body 22 is against the side of the mold core 1.

[0035] For a test module provided by an embodiment of the present invention, since each needle tip 24 and the corresponding needle tail 21 are respectively inserted in the corresponding needle tip groove 13 and the needle tail groove 11, each needle tip 24 and each needle tail 21 protrude from the avoidance protrusion 12 and the mold core 1 respectively, and the main body 22 is against the side of the mold core 1, thereby realizing the insertion arrangement of multiple spring needles 2 in the mold core 1 through the insertion of the needle tip 24 and the needle tail 21.

[0036] Furthermore, the bottom of the mold core 1 has a avoidance protrusion 12, and a plurality of needle tip grooves 13 are located on the avoidance protrusion 12, so that for the pad point 300 corresponding to the small screen located in the middle, the avoidance protrusion 12 can be inserted into the gap together with the needle tip 24 to realize the crimping of the pad point 300 (the total length of the avoidance protrusion 12 and the part of the needle tip 24 extending out of the mold core 1 is greater than the thickness of the screen light-emitting area 200 by 0.5mm). At this time, the avoidance protrusion 12 and the mold core 1 will not squeeze the screen light-emitting area 200. In addition, the needle tip groove 13 in the avoidance protrusion 12 can accommodate the needle tip 24. Although the needle tip 24 is longer than the conventional structure, it will not bend or deform because the needle tip 24 is partially inserted in the avoidance protrusion 12, and it can be ensured that the length of the needle tip 24 extending out of the avoidance protrusion 12 is small (less than 0.5mm), which meets the process requirements. In addition, since the needle tail 21, the main body 22, the needle arm 23 and the needle tip 24 are arranged in sequence from top to bottom along the crimping direction, and the needle arm 23 is in a broken line shape, the broken line arrangement of the needle arm 23 (including the extension in the horizontal direction and the downward direction) not only realizes the connection between the main body 22 and the needle tip 24, and facilitates the swing of the needle tip 24 during the crimping process, but also reduces the length of the needle tip 24 in the crimping direction while keeping the length of the extended avoidance protrusion 12 constant, thereby greatly reducing the depth of the needle tip groove 13, and thus reducing the processing difficulty of the avoidance protrusion 12 and reducing the production cost.

[0037] That is to say, the test module provided by the embodiment of the present invention can not only realize the crimping of the pad point 300 corresponding to the small screen in the middle of the silicon substrate 100, avoiding the problem of the screen light-emitting area 200 being crushed, but also reduce production costs.

[0038] It is easy to understand that by arranging the avoidance protrusion 12 and increasing the overall length of the needle tip 24, the problem of the screen luminous area 200 being crushed can be effectively avoided. However, the shrapnel needle 2 is a flat structure and its size is relatively small, resulting in the size of the needle tip groove 13 for accommodating the needle tip 24 being also relatively small. In particular, for the depth of the needle tip groove 13, high-precision processing equipment is required (at this time, the depth of the needle tip groove 13 is about 0.9 mm, which is often difficult to complete with conventional processing equipment), resulting in increased production costs. The present invention, through the Z-shaped arrangement of the needle arm 23, can not only realize the swing of the needle tip 24 during the crimping process, but also reduce the height of the top of the needle tip 24, so that when the needle tip 24 is extended to the same length, the insertion depth of its top is reduced (about 0.6 mm), which can also greatly reduce the depth of the needle tip groove 13, so that the processing can be completed by conventional processing equipment, reducing the production cost of the test module 10.

[0039] Exemplarily, the mold core 1 may be a ceramic structure, which serves to insulate the plurality of spring pins 2 .

[0040] In one implementation of the present invention, each needle arm 23 includes a first transverse portion 231, a connecting portion 232 and a second transverse portion 233 connected in sequence, the first transverse portion 231 is vertically connected to the body 22, the second transverse portion 233 is vertically connected to the needle tip 24, the first transverse portion 231 and the second transverse portion 233 are arranged in parallel and spaced apart, and the second transverse portion 233 is inserted in the corresponding needle tip groove 13.

[0041] In the above embodiment, the connecting portion 232 is arranged vertically or at an angle, which not only connects the first transverse portion 231 and the second transverse portion 233, but also significantly reduces the height of the second transverse portion 233, thereby reducing the height of the needle tip 24. In addition, the second transverse portion 233 is inserted into the needle tip groove 13, allowing the bottom of the needle arm 23 to be inserted into the avoidance protrusion 12, which not only ensures the insulation of the bottom of the needle arm 23, but also ensures the connection strength between the needle arm 23 and the needle tip 24 during the crimping process.

[0042] Furthermore, the outer peripheral walls of the main body 22 , the first transverse portion 231 and the connecting portion 232 are all coated with an insulating layer 3 .

[0043] It's easy to understand that the tail 21 of the spring-type needle 2 is inserted into the tail slot 11, while the tip 24 and second transverse portion 233 are inserted into the tip slot 13. Therefore, the body 22, first transverse portion 231, and connecting portion 232 are completely exposed to the mold core 1 or the avoidance protrusion 12. By coating the outer circumference of the body 22, first transverse portion 231, and connecting portion 232 with an insulating layer 3, short circuits caused by swinging contact between adjacent structures during the crimping process can be effectively avoided.

[0044] Exemplarily, in the vertical direction, there is a certain distance between the second transverse portion 233 and the needle tip groove 13, so as to facilitate the swing of the needle arm 23 and avoid interference.

[0045] Continue to see Figure 5 The needle tail 21 is a U-shaped structure. One end of the needle tail 21 is connected to the body 22. The other end of the needle tail 21 has a contact portion 211. The contact portion 211 protrudes from the mold core 1.

[0046] In the above embodiment, the needle tail 21 is a U-shaped structure, and the contact portion 211 protrudes from the mold core 1, so that when the mold core 1 drives the spring needle 2 to press down, the top of the needle tail 21 can easily drive the contact portion 211 to swing.

[0047] It should be noted that the contact portion 211 is a conductive component between the spring pin 2 and the FPC.

[0048] In this embodiment, the needle tail 21 has a locking boss 212 , and the locking boss 212 and the body 22 are respectively located on two sides of the mold core 1 to clamp the mold core 1 .

[0049] In the above embodiment, the engagement of the positioning boss 212 and the body 22 can achieve the clamping and fixing of the spring needle 2 in the horizontal direction of the mold core 1 .

[0050] For example, when the spring-type needle 2 is inserted parallel to the mold core 1, the top of the mold core 1 presses against the retaining boss 212, causing the needle tail 21 to deform and swing upward. When the retaining boss 212 slides to the other side of the mold core 1, the retaining boss 212 and the mold core 1 are offset, and the needle tail 21 deforms and resets downward, thereby allowing the retaining boss 212 to cooperate with the body 22 to clamp the mold core 1.

[0051] Furthermore, the main body 22 has a limiting boss 221 , and the limiting boss 221 and the needle tail 21 are arranged at intervals to clamp the mold core 1 .

[0052] It is easy to understand that the limiting boss 221 and the needle tail 21 can achieve vertical clamping of the mold core 1. In other words, by limiting the vertical and horizontal positions of each spring needle 2, the swing of the main body 22 of the spring needle 2 can be effectively reduced, preventing two adjacent spring needles 2 from contacting each other and causing a short circuit.

[0053] Exemplarily, a positioning platform 14 is provided on one side of the mold core 1 , the positioning platform 14 abuts against the body 22 , and the limiting boss 221 and the needle tail 21 are located on both sides of the positioning platform 14 .

[0054] In the above embodiment, the mold core 1 is clamped by the limiting boss 221 and the needle tail 21 clamping the positioning platform 14, so as to avoid the clamping distance in the vertical direction being too large to affect the clamping effect.

[0055] Exemplarily, the side of the limiting boss 221 facing the mold core 1 has a chamfer, so that when the spring needle 2 is horizontally inserted, the limiting boss 221 is easily inserted under the positioning platform 14.

[0056] In addition, the width a of the avoidance protrusion 12 in the direction parallel to the cross section of the spring needle 2 is 0.7-1.5 mm (see Figure 3 ).

[0057] It should be noted that the gap between two adjacent screen luminous areas 200 is usually 1.8-2.0 mm. The width a of the avoidance bump 12 in the direction parallel to the cross section of the spring needle 2 can be 0.7-1.5 mm, which can ensure that the avoidance bump 12 can be inserted into the gap, thereby completing the conduction between the needle tip 24 and the pad point 300.

[0058] For example, the length of the needle tip 24 of each spring needle 2 protruding from the avoidance protrusion 12 may be 0.3-0.45 mm, which meets the process requirements and prevents the needle tip 24 from bending and deforming during the crimping process.

[0059] Figure 6 This is a schematic structural diagram of a crimping jig provided by an embodiment of the present invention. Figure 7 This is a partial schematic diagram of the crimping jig provided by an embodiment of the present invention, combined with Figure 6 and Figure 7 As shown, the crimping fixture includes a base 4, a crimping head assembly 5 and the above-mentioned test module 10.

[0060] The base 4 has a PCB board 41 and an FPC 42. The PCB board 41 has a signal input port. The PCB board 41 and the FPC 42 are connected. The pressure head assembly 5 is located on the base 4. The mold core 1 is located on the pressure head assembly 5, and the needle tail 21 of each spring needle 2 is connected to the FPC 42.

[0061] In the above embodiment, the base 4 is lowered by the lifting mechanism, which in turn drives the pressure head assembly 5 and the test module 10 downward, so that the needle tip 24 of the spring needle 2 is pressed against the pad point 300. At this time, by providing an electrical signal to the signal input port of the PCB board 41, the electrical signal can be transmitted to the FPC 42, the spring needle 2 and the pad point 300 in sequence, thereby ultimately illuminating the corresponding screen light-emitting area 200.

[0062] For example, the base 4 is provided with connecting bolts 43 , which serve to connect the base 4 and the lifting mechanism.

[0063] In this embodiment, the pressure head assembly 5 includes a fixed seat 51 and a floating platform 52. The fixed seat 51 is located on the base 4. The floating platform 52 is located below the fixed seat 51 and is connected to the fixed seat 51 through a spring. A height adjustment bolt 53 is movably passed through the fixed seat 51. The top of the height adjustment bolt 53 has an outer flange to abut against the fixed seat 51. The bottom end of the height adjustment bolt 53 is threadedly engaged with the floating platform 52. The mold core 1 is located on the floating platform 52.

[0064] In the above embodiment, the spring-loaded floating platform 52 allows it to float upward during the crimping process (the height adjustment bolt 53 drives the floating platform 52 upward relative to the fixed base 51), preventing excessive downward pressure from bending or deforming the needle tip 24. Furthermore, the threaded engagement of the height adjustment bolt 53 with the floating platform 52 allows the initial position of the floating platform 52 to be adjusted, thereby fine-tuning the crimping height.

[0065] For example, the fixing seat 51 has a vertically arranged slide rail 54 , and the floating platform 52 and the slide rail 54 are slidably matched, thereby guiding the floating of the floating platform 52 .

[0066] It will be easily understood by those skilled in the art that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A test module, characterized in that: The test module comprises a mold core and a plurality of spring pins arranged in parallel and spaced apart; The top of the mold core is provided with a needle tail groove, the bottom of the mold core is provided with a position-avoiding protrusion, the position-avoiding protrusion is provided with a plurality of needle tip grooves, and the position-avoiding protrusion is used to be inserted into the gap between the two screen light-emitting areas; Each of the spring needles includes a needle tail, a body, a needle arm and a needle tip connected in sequence from top to bottom, and the needle arm is in a broken line shape. Each needle tip and the corresponding needle tail are respectively inserted into the corresponding needle tip groove and the needle tail groove, and each needle tip and each needle tail protrudes from the avoidance protrusion and the mold core respectively, and the body is against the side of the mold core.

2. A test module according to claim 1, characterized in that: Each needle arm includes a first transverse portion, a connecting portion and a second transverse portion connected in sequence, the first transverse portion is vertically connected to the body, the second transverse portion is vertically connected to the needle tip, the first transverse portion and the second transverse portion are arranged in parallel and spaced apart, and the second transverse portion is inserted in the corresponding needle tip groove.

3. A test module according to claim 2, characterized in that: The outer peripheral walls of the main body, the first transverse portion and the connecting portion are all coated with an insulating layer.

4. The test module according to claim 1, wherein: The needle tail is a U-shaped structure, one end of the needle tail is connected to the body, and the other end of the needle tail has a contact portion, and the contact portion protrudes from the mold core.

5. A test module according to claim 4, characterized in that: The needle tail is provided with a positioning boss, and the positioning boss and the body are respectively located on both sides of the mold core to clamp the mold core.

6. The test module according to claim 1, wherein: The main body is provided with a limiting boss, and the limiting boss and the needle tail are arranged at intervals to clamp the mold core.

7. A test module according to claim 6, characterized in that: One side of the mold core is provided with a positioning platform, the positioning platform is against the body, and the limiting boss and the needle tail are located on both sides of the positioning platform.

8. A test module according to any one of claims 1 to 7, characterized in that: The width direction of the gap between the two screen light-emitting areas of the avoidance protrusion is 0.7-1.5 mm.

9. A crimping jig, characterized in that: The crimping jig comprises a base, a crimping head assembly, and a test module according to any one of claims 1 to 8; The base is provided with a PCB board and an FPC, the PCB board is provided with a signal input port, the PCB board and the FPC are connected, the pressure head assembly is located on the base, the mold core is located on the pressure head assembly, and the needle tails of each of the spring needles are connected to the FPC.

10. The crimping jig according to claim 9, characterized in that: The pressure head assembly includes a fixed seat and a floating platform. The fixed seat is located on the base. The floating platform is located below the fixed seat and is connected to the fixed seat through a spring. A height adjustment bolt is movably passed through the fixed seat. The top end of the height adjustment bolt has an outer flange to abut against the fixed seat. The bottom end of the height adjustment bolt is threaded with the floating platform. The mold core is located on the floating platform.

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