Auxiliary limit detection fixture for flexible circuit board

Abstract

The present invention discloses an auxiliary limit detection fixture for a flexible circuit board, comprising a fixed base plate, a product base plate is installed on the fixed base plate in parallel, a sliding piece is arranged between the product base plate and the fixed base plate, a groove is arranged at the front end of the product base plate, a pendulum device is arranged at a position on the fixed base plate corresponding to the groove at the front end of the product base plate, an alarm device is arranged at an adjacent position of the pendulum device, a clamper pad is also arranged on the fixed base plate, a clamper is arranged above the clamper pad, and the clamper is used to drive the product base plate to translate on the sliding piece. The present invention is a detection fixture designed for the high-precision requirements in the manufacturing process of flexible circuit boards in display module products, which can easily and quickly detect the accuracy of products and whether the products are qualified, and the overall structure is simple, easy to form, compact and portable, avoiding the great labor intensity of manual detection, effectively saving working hours, improving work efficiency, and also improving detection accuracy to ensure product quality.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit board detection, and in particular to an auxiliary limit detection fixture for a flexible circuit board. Background Art

[0002] Flexible printed circuits (FPCs) are made by forming circuit patterns on polyimide or polyester film substrates. They are widely used in different electronic products due to their thinness and flexibility, such as laptops, smart phones, digital cameras, and display screens. When flexible printed circuits are used in display module products, there are often strict requirements on the distance between the FPC bending position and the edge of the display module cover. The general method is to control the distance accuracy manually or use a 2.5-dimensional measuring instrument for measurement. However, this method is time-consuming and labor-intensive in actual application, which seriously reduces the production efficiency of the product. Summary of the invention

[0003] In view of the above problems, the present invention proposes an auxiliary limit detection fixture for a flexible circuit board, which mainly solves the problems in the background technology.

[0004] The present invention proposes an auxiliary limit detection fixture for a flexible circuit board, comprising a fixed base plate, a product base plate is installed parallel to the fixed base plate, a sliding member is arranged between the product base plate and the fixed base plate, a groove is provided at the front end of the product base plate, a pendulum device is arranged at a position on the fixed base plate corresponding to the groove at the front end of the product base plate, the pendulum device comprises a pendulum part and a fixed part, the fixed part is provided with an insulating support, a conductive contact part, a limit part and a fixed base, the insulating support is connected to the pendulum part, the fixed base is connected to the fixed base, the limit part is located between the insulating support and the fixed base, and is used to receive the product to be detected having a flexible circuit board and limit its position, and the pendulum part can be pushed to contact or separate from the conductive contact part.

[0005] A further improvement is that an alarm device is provided at an adjacent position of the pendulum device, a clamper pad is provided on the fixed base plate, a clamper is provided above the clamper pad, and the clamper is used to drive the product base plate to translate on the sliding member.

[0006] A further improvement is that the pendulum part includes a metal paddle and a paddle mounting block, the pendulum device also includes a pendulum device fixing seat and a fine-tuning part, the pendulum device fixing seat is fixedly mounted on the fixed base plate and the fixed base is fixedly mounted on the pendulum device fixing seat, the fixing part is L-shaped, the fixing part is provided with a boss, the boss is provided with an insulating support member, the insulating support member is two insulating columns, the paddle mounting block is rotatably mounted between the two insulating columns through a rotating shaft, and the front end surface of the paddle mounting block is provided with a metal paddle.

[0007] A further improvement is that the fixed base is provided with a U-shaped hole, the fixed base is adjustable and limitedly mounted on the pendulum device fixing base through the U-shaped hole, and a fine-tuning piece is provided at the rear end of the fixed base.

[0008] A further improvement is that the fine-tuning part is a Misumi micrometer head.

[0009] A further improvement is that the thickness of the metal pick is 0.4 mm.

[0010] A further improvement is that the metal paddle and the paddle mounting block are both conductors, and the paddle mounting block is connected to the negative pole of the power supply through a wire, the fixed base is connected to the positive pole of the power supply through a wire, and the alarm device is connected in series to the circuit of the power supply, the paddle mounting block and the fixed base.

[0011] A further improvement is that the alarm device includes an alarm light and a buzzer.

[0012] A further improvement is that the number of the sliding parts is 2, and the sliding parts are respectively arranged on the two side edges of the fixed base plate, the sliding parts include a guide shaft, a guide sleeve sliding block and a guide shaft fixing block, the guide shaft fixing block is installed on the fixed base plate, the guide shaft is fixedly penetrated on the guide shaft fixing block, the guide shaft is provided with the guide sleeve sliding block on the sliding sleeve, and the guide sleeve sliding block is fixedly installed on the product base plate.

[0013] A further improvement is that a limiting groove is provided on the bottom plate of the product, the limiting groove is used to place the display module product, and placement grooves are provided on both sides of the limiting groove, which facilitate manual placement of the display module product in the limiting groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The present invention is a testing fixture designed for the high-precision requirements in the production process of flexible circuit boards in display module products. It can easily and quickly detect product accuracy and whether the product is qualified. The overall structure is simple and easy to form. It is small and portable, avoiding the great labor intensity of manual inspection, effectively saving working hours, improving work efficiency, and also improving detection accuracy to ensure product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings are only used for illustrative purposes and should not be construed as limitations on this patent. In order to better illustrate this embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0017] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0018] Figure 2 It is a schematic diagram of a top view structure of an embodiment of the present invention;

[0019] Figure 3 It is a schematic structural diagram of a pendulum device according to one embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of a display module product according to one embodiment of the present invention;

[0021] Among them: 1. Fixed base plate; 2. Product base plate; 3. Guide shaft fixing block; 4. Guide shaft; 5. Guide sleeve sliding block; 6. Clamp pad; 7. Metal pick; 8. Insulating column; 9. Fixed base; 10. Pick mounting block; 11. Pendulum device fixing seat; 12. Fine-tuning part; 13. Rotating shaft; 14. Limiting groove; 15. Placement groove; 16. Display module; 17. FPC board; 18. FPC bending position; 19. Cover plate; 20. Cover plate groove; 21. The distance between the FPC bending position and the cover plate edge. DETAILED DESCRIPTION

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be said that the internal connection of two components is connected. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The technical solution of the present invention is further explained below in conjunction with the accompanying drawings and embodiments.

[0023] Reference Figure 4In the display module 16 (such as a liquid crystal display module) product, an FPC board 17 is often used. Due to the requirement for process accuracy, the distance between the FPC bending position 18 and the edge of the cover plate 19 of the display module 16 becomes an important indicator for considering product accuracy. Figure 4 As shown, the display module 16 has a groove on the cover plate 19 at the FPC bending position 18, so that the FPC bending position 18 is exposed, and the distance measurement from the exposed FPC bending position 18 to the edge of the cover plate 19 becomes a difficult problem to solve during the manufacturing process of the display module 16. Based on this, the present application specifically proposes an auxiliary limit detection fixture for a flexible circuit board.

[0024] Reference Figure 1-3 , an auxiliary limit detection fixture for a flexible circuit board, comprising a fixed base plate 1, a product base plate 2 is mounted on the fixed base plate 1 in parallel, a sliding member is arranged between the product base plate 2 and the fixed base plate 1, a groove is provided at the front end of the product base plate 2, a pendulum device is arranged at a position corresponding to the groove at the front end of the product base plate 2 on the fixed base plate 1, an alarm device is arranged at an adjacent position of the pendulum device, a clamp pad 6 is also arranged on the fixed base plate 1, a clamp is arranged above the clamp pad 6, and the clamp is used to drive the product base plate 2 to translate on the sliding member. The front end of the product base plate 2 refers to the front when the product base plate 2 moves close to the pendulum device.

[0025] As an embodiment, the clamp has a fixing frame mounted on the clamp pad 6, and the fixing frame has an L-shaped flat shape. Specifically, the fixing frame has a bottom fixed to the clamp pad 6 and a vertically arranged support wall connected to the bottom, and the support wall faces the side of the rear end of the product base plate 2. A guide cylinder is provided on the support wall and is aligned with an opening opened in the support wall. A push rod coaxial with the guide cylinder is sleeved in the hollow tube core of the guide cylinder. The clamp also has a shaking handle, which is provided on a protrusion at one end of the fixing frame away from the support wall. One end of the shaking handle is connected to the protrusion by a hinged manner, so that the free end of the shaking handle can be shaken back and forth in the direction of the support wall. The end of the push rod away from the protrusion extends out of the sleeve for a certain length, and the end of the push rod close to the protrusion passes through the support wall. The clamp is also provided with a long connecting piece, which is provided between the supporting wall and the protrusion, one end of which is hinged to the end of the push rod close to the protrusion, and the other end of which is hinged to the shaking handle at a position near the hinge between the push rod and the protrusion. The push rod is provided with a connecting piece at one end away from the clamp pad 6 in the direction toward the product bottom plate 2, and the connecting piece is used to be fixed to the side of the product bottom plate 2 away from the pendulum device (i.e., the rear end of the product bottom plate 2).

[0026] A vertical opening is provided at a location of the product bottom plate 2 close to the clamp, and a through hole is provided at a side of the product bottom plate 2 facing the clamp, the through hole is connected to the vertical opening, the connecting member can pass through the through hole, and the connecting member also has mounting nuts respectively provided at the vertical opening and the side of the product bottom plate 2, the mounting nuts clamp the wall of the product bottom plate 2 provided with the through hole, so that the connecting member is fixed to the product bottom plate 2. In this way, the product bottom plate 2 can be translated forward and backward by controlling the shaking handle.

[0027] The pendulum device includes a pendulum part and a fixed part, the pendulum part is pivotally connected to the fixed part, the pendulum device is firmly installed on the fixed base plate 1 through the fixed part, and the pivot axis of the pendulum part is perpendicular to the translation direction of the product base plate 2. The fixed part also includes an insulating support, a conductive contact part, a limit part and a fixed base 9. The fixed base 9 is connected to the fixed base plate 1 and supports the insulating support, the conductive contact part and the limit part installed thereon. The pendulum part is connected to the insulating support, specifically, the pendulum part can pivot relative to the fixed part. The limit part is located between the insulating support and the fixed base 9. The conductive contact part is located between the limit part and the insulating support. The insulating support, the conductive contact part and the limit part are arranged vertically to each other when viewed from the side direction, that is, they are arranged vertically substantially perpendicular to the fixed base plate 1. The fixed base 9 is connected to the fixed base plate 1 in a flat shape and supports the rest of the fixed part. The fixed part is L-shaped as a whole. The limiting portion is used to receive a product to be detected having a flexible circuit board and limit the position of the product to be detected, and the pendulum portion can be pushed to contact or separate from the conductive contact portion.

[0028] From a top view, the size of the groove is large enough for the product bottom plate 2 to move horizontally without colliding with the pendulum device. Under the action of the sliding member, the product bottom plate 2 moves horizontally to make the pendulum device leave the groove, and the user can place or take away the product to be tested at this time. After placing the product to be tested, the product bottom plate 2 can be moved toward the pendulum device. Furthermore, the groove is two connected openings, the width of the front opening is greater than the width of the rear opening, and the groove is in a "convex" shape.

[0029] As a preferred embodiment of the present invention, the pendulum part includes a metal paddle 7 and a paddle mounting block 10. The pendulum device also includes a pendulum device fixing seat 11, which is fixedly mounted on the fixed bottom plate 1, and a fixed base 9 is installed on the pendulum device fixing seat 11.

[0030] The fixing portion is provided with a boss, and an insulating support is provided on the boss. Preferably, the insulating support is two insulating columns 8, and the paddle mounting block 10 is rotatably mounted between the two insulating columns 8 via a rotating shaft 13, and a metal paddle 7 is provided on the front end surface of the paddle mounting block 10.

[0031] Specifically, the boss may be the conductive contact portion, or the conductive contact portion may be provided on a side of the boss facing the product bottom plate 2. The metal paddle 7 is in a long flat shape and is arranged to extend downward from the paddle mounting block 10. One end of the metal paddle 7 is mounted on the paddle mounting block 10, and the other end is a free end, and this arrangement allows the metal paddle 7 to be suspended approximately vertically. Preferably, the metal paddle 7 extends downward so that the horizontal position of its free end falls into or even exceeds the horizontal position of the conductive contact portion. Preferably, the metal paddle 7 extends downward to a certain length so that the moving trajectory of the free end passes through the conductive contact portion when the pendulum portion is pushed to pivot.

[0032] The clamper translates the product bottom plate 2 to a specific limit position, which may be a position where the display module 16 and a side surface of the boss of the fixing base 9 are in the same vertical plane.

[0033] As a preferred embodiment of the present invention, the limiting portion is located between the conductive contact portion and the fixed base 9, and provides a side wall to limit the further forward movement of the product to be detected. The side wall is parallel to a side surface of the product bottom plate 2 facing the boss, and is offset relative to the side surface, that is, the side wall of the limiting portion is farther away from the product bottom plate 2 than the side surface of the boss.

[0034] As a preferred embodiment of the present invention, the position of the side wall is adjustable along the translation direction of the product bottom plate 2, which can be achieved by installing an adjustment mechanism on the limiting portion. For example, the limiting portion includes a main body connected to the fixed portion (the main body is connected to the boss and the fixed base 9 respectively), and an adjustable portion including the side wall, and the side wall is adjustable forward and backward in the direction of the product bottom plate 2 through an adjustment mechanism provided between the adjustable portion and the main body. The side wall of the limiting portion can be adjusted according to different styles of display products to be tested and test requirements, especially the horizontal distance between the side wall and the side of the convex surface.

[0035] As a preferred embodiment of the present invention, the pendulum device further comprises a fine-tuning member 12, and the fine-tuning member 12 is arranged at the rear end of the fixed base (9). For the pendulum device, the rear end refers to the end away from the product bottom plate 2.

[0036] As a preferred embodiment of the present invention, the fixed base 9 is provided with a U-shaped hole, and the fixed base 9 is adjustable and limitedly mounted on the pendulum device fixing base 11 through the U-shaped hole, and a fine-tuning part 12 is provided at the rear end of the fixed base 9.

[0037] Specifically, the fine adjustment member 12 is used to accurately measure and adjust the displacement of the fixed base 9 on the pendulum device fixed base 11 to improve the measurement accuracy. More specifically, assuming that the preset threshold is 1.6mm and the metal pick 7 is 0.4mm, the fixed distance of the metal pick should be adjusted to 1.2mm.

[0038] As a preferred embodiment of the present invention, the fine adjustment member 12 is a Misumi micrometer head. Specifically, the Misumi micrometer head can accurately adjust the micro distance, and the adjustable range is between 0-6.5 (±3.25) mm.

[0039] As a preferred embodiment of the present invention, the thickness of the metal pick 7 is 0.4 mm.

[0040] As a preferred embodiment of the present invention, the metal pick 7 and the pick mounting block 10 are both conductors, and the pick mounting block 10 is connected to the negative pole of the power supply through a wire, and the fixing portion (such as a conductive contact portion) is connected to the positive pole of the power supply through a wire, and the alarm device is connected in series to the circuit of the power supply, the pick mounting block 10 and the fixed base 9. As a preferred embodiment of the present invention, the boss (plus the conductive contact portion) is a conductor.

[0041] As a preferred embodiment of the present invention, the alarm device includes an alarm light and a buzzer.

[0042] Specifically, the metal pick 7 touches the conductive contact portion to complete the circuit connection, and then the buzzer sounds and the alarm light is turned on.

[0043] As a preferred embodiment of the present invention, the number of the sliding members is 2, and the sliding members are respectively arranged on both sides of the fixed bottom plate 1, and the sliding members include a guide shaft 4, a guide sleeve sliding block 5 and a guide shaft fixing block 3, the guide shaft fixing block 3 is installed on the fixed bottom plate 1, the guide shaft 4 is fixedly penetrated on the guide shaft fixing block 3, the guide shaft 4 is slidably sleeved with the guide sleeve sliding block 5, and the guide sleeve sliding block 5 is fixedly installed on the product bottom plate 2. The use of the sliding members is to enable the clamper to smoothly move the product bottom plate 2, and smoothly move the display module 16 to the pendulum device structure at the detection end.

[0044] As a preferred embodiment of the present invention, a limiting groove 14 is provided on the product base plate 2, and the limiting groove 14 is used to place the display module 16 product. Placement grooves 15 are provided on both sides of the limiting groove 14, and the placement grooves 15 facilitate manual placement of the display module 16 product in the limiting groove 14.

[0045] Specifically, the specific method of using the auxiliary limit detection fixture of the present application is as follows:

[0046] The display module 16 is placed in the limiting groove 14 of the product bottom plate 2, and the clamp is driven to push the display module 16 to the pendulum device with the help of the sliding member. If the distance between the FPC bending position 18 and the cover plate 19 is less than the preset threshold, the FPC bending position 18 will push the metal paddle 7 to touch the fixed base 9, connect the alarm circuit and alarm. If the distance between the FPC bending position 18 and the cover plate 19 is greater than the preset threshold, the FPC bending position 18 cannot push the metal paddle 7 to touch the fixed base 9, and the alarm circuit is not connected. In practical applications, the alarm circuit alarm can be determined to determine whether the product is qualified based on whether the actual product needs to be greater than or less than the preset threshold.

[0047] Compared with the prior art, the present invention has the following beneficial effects:

[0048] The present invention is a testing fixture designed for the high-precision requirements in the production process of flexible circuit boards in display module 16 products. It can easily and quickly detect product accuracy and whether the product is qualified. The overall structure is simple and easy to shape. It is small and portable, avoiding the great labor intensity of manual inspection, effectively saving working hours, improving work efficiency, and also improving detection accuracy to ensure product quality.

[0049] In the figure, the description of the positional relationship is only for illustrative purposes and should not be understood as a limitation on this patent; obviously, the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. 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 claims of the present invention.

Claims

1. An auxiliary limit detection fixture for a flexible circuit board, characterized in that: The invention comprises a fixed base plate (1), a product base plate (2) is mounted on the fixed base plate (1) in parallel, a sliding member is arranged between the product base plate (2) and the fixed base plate (1), a groove is arranged at the front end of the product base plate (2), a pendulum device is arranged at a position on the fixed base plate (1) corresponding to the groove at the front end of the product base plate (2), the pendulum device comprises a pendulum part and a fixed part, the fixed part is provided with an insulating support part, a conductive contact part, a limiting part and a fixed base (9), the insulating support part is connected to the pendulum part, the fixed base (9) is connected to the fixed base plate (1), the limiting part is used to receive a product to be detected having a flexible circuit board and limit its position, and the pendulum part can be pushed to contact or separate with the conductive contact part; The pendulum part comprises a metal paddle (7) and a paddle mounting block (10), the pendulum device further comprises a pendulum device fixing seat (11) and a fine-tuning member (12), the pendulum device fixing seat (11) is fixedly mounted on the fixing base plate (1) and the fixing base (9) is fixedly mounted on the pendulum device fixing seat (11), the fixing part is L-shaped, the fixing part is provided with a boss, an insulating support member is provided on the boss, the insulating support member is two insulating columns (8), the paddle mounting block (10) is rotatably mounted between the two insulating columns (8) via a rotating shaft (13), and the front end surface of the paddle mounting block (10) is provided with the metal paddle (7); A limiting groove (14) is provided on the product bottom plate (2), and the limiting groove (14) is used to place a display module (16) product. Placement grooves (15) are provided on both sides of the limiting groove (14), and the placement grooves (15) facilitate manual placement of the display module (16) product in the limiting groove (14).

2. The auxiliary limit detection fixture for a flexible circuit board according to claim 1, characterized in that: An alarm device is arranged at an adjacent position of the pendulum device, and a clamp pad (6) is also arranged on the fixed base plate (1). A clamp is arranged above the clamp pad (6), and the clamp is used to drive the product base plate (2) to translate on the sliding member.

3. The auxiliary limit detection fixture for a flexible circuit board according to claim 1, characterized in that: The fixed base (9) is provided with a U-shaped hole, and the fixed base (9) is installed on the pendulum device fixing base (11) in an adjustable manner through the U-shaped hole. A fine-tuning member (12) is provided at the rear end of the fixed base (9).

4. The auxiliary limit detection fixture for a flexible circuit board according to claim 1, characterized in that: The fine-tuning component (12) is a Misumi micrometer head.

5. The auxiliary limit detection fixture for a flexible circuit board according to claim 1, characterized in that: The thickness of the metal pick (7) is 0.4 mm.

6. The auxiliary limit detection fixture for a flexible circuit board according to claim 2, characterized in that: The metal pick (7) and the pick mounting block (10) are both conductors, and the pick mounting block (10) is connected to the negative pole of the power supply via a wire, and the fixed base (9) is connected to the positive pole of the power supply via a wire, and the alarm device is connected in series to the circuit of the power supply, the pick mounting block (10) and the fixed base (9).

7. The auxiliary limit detection fixture for a flexible circuit board according to claim 2, characterized in that: The alarm device comprises an alarm light and a buzzer.

8. The auxiliary limit detection fixture for a flexible circuit board according to claim 1, characterized in that: The number of the sliding parts is two, and the sliding parts are respectively arranged on the two side edges of the fixed base plate (1), and the sliding parts include a guide shaft (4), a guide sleeve sliding block (5) and a guide shaft fixing block (3). The guide shaft fixing block (3) is installed on the fixed base plate (1), the guide shaft (4) is fixedly penetrated on the guide shaft fixing block (3), the guide shaft (4) is provided with a guide sleeve sliding block (5) on the sliding sleeve, and the guide sleeve sliding block (5) is fixedly installed on the product base plate (2).

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