FPC board anti-fracture structure

Abstract

The embodiment of the utility model provides an anti-fracture structure of an FPC (Flexible Printed Circuit) board, and relates to the field of FPC boards. Comprising an FPC circuit board and a heat dissipation plate, and the FPC circuit board is arranged above the heat dissipation plate; positioning blocks are arranged at the four corners of the top of the heat dissipation plate, limiting grooves are formed in the inner sides of the positioning blocks, and the four corners of the FPC extend into the limiting grooves and are matched with the limiting grooves; a plurality of metal reinforcing strips arranged side by side are embedded in the middle of the heat dissipation plate. The top of the metal reinforcing strip extends upwards and abuts against the bottom face of the FPC circuit board. Elastic supporting blocks are respectively arranged at the positions, opposite to the edges of the positioning blocks, of the two sides of the metal reinforcing strip; the elastic supporting block is arc-shaped, and the top of the elastic supporting block is in point-surface contact with the FPC circuit board. According to the invention, the supporting performance, the pulling resistance and the bending fracture resistance of the FPC circuit board can be improved, and meanwhile, the heat dissipation performance of the FPC circuit board is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of flexible circuit board, in particular to a FPC board anti -break structure. BACKGROUND

[0002] FPC flexible circuit board is with polyimide or polyester film as base material makes a kind of with highly reliable, excellent flexible printed circuit board, with the characteristics of high wiring density, light weight, thin, good bending.

[0003] The utility model discloses a kind of anti-breaking structures of FPC circuit board, including heat sink and circuit board, the circuit board is installed in the top of heat sink, heat sink is equipped with pad between circuit board, the upper end of heat sink is located at the four around of circuit board and is equipped with positioning block, the inner side of positioning block is equipped with limit slot, the corner of circuit board is inserted into limit slot and is compatible therewith, heat sink, circuit board and pad are all equipped with multiple sets of mutually aligned heat dissipation holes.

[0004] The device supports the circuit board by the pad between heat sink and circuit board, prevents the center of circuit board from being bent under external force. Although the pad in the device is provided with through holes for heat dissipation, most of the surface area of the pad is still attached to the circuit board and the pad, which affects heat dissipation. The anti-stretching, bending and breaking performance of the pad still needs to be improved. UTILITY MODEL CONTENTS

[0005] In view of the above problems, the present utility model embodiment is proposed to provide a FPC board anti-breaking structure that overcomes the above problems or at least partially solves the above problems.

[0006] A FPC board anti-breaking structure includes a FPC circuit board and a heat sink, the FPC circuit board is arranged above the heat sink;

[0007] The top four corners of the heat sink are provided with positioning blocks, the inner side of the positioning block is provided with a limit slot, the four corners of the FPC circuit board are inserted into the limit slot and are compatible therewith;

[0008] A plurality of metal reinforcing strips are embedded in the middle of the heat sink and arranged side by side; the top of the metal reinforcing strip extends upward and abuts against the bottom surface of the FPC circuit board;

[0009] Elastic support blocks are arranged at positions opposite to the edges of the positioning blocks on both sides of the metal reinforcing strip; the elastic support blocks are arc-shaped, and the top of the elastic support blocks is in point-plane contact with the FPC circuit board.

[0010] Preferably, the FPC circuit board is provided with positioning columns at four corners; the positioning block is provided with positioning slots at the bottom, which are opposite to the positioning columns and adapted to the positioning columns.

[0011] Preferably, the positioning block is provided with connecting holes at positions opposite to the positioning slots at the top, which are communicated with the positioning slots.

[0012] Preferably, the metal reinforcing strips are provided with shaping strips between adjacent metal reinforcing strips.

[0013] Preferably, the bottom of the metal reinforcing strip penetrates the heat dissipation plate and is flush with the bottom surface of the heat dissipation plate, and the metal reinforcing strip is provided with a plurality of through holes.

[0014] Preferably, the FPC circuit board is provided with a first threaded hole penetrating the positioning block near the positioning block; the top of the positioning block is provided with a second threaded hole, which is opposite to the first threaded hole and has the same inner diameter.

[0015] Preferably, the heat dissipation plate is provided with stepped bosses at both ends, and the positioning block is arranged on the stepped bosses.

[0016] Preferably, the elastic supporting block comprises an arc-shaped block and a compression spring, one end of the compression spring is fixedly connected to the inner top center point of the arc-shaped block, and the other end of the compression spring is fixedly connected to the heat dissipation plate; the arc-shaped block is provided with limiting blocks at both ends; the heat dissipation plate is provided with sliding grooves at positions opposite to both ends of the arc-shaped block, and the limiting blocks are slidingly limited in the sliding grooves.

[0017] Preferably, the inner top of the positioning block is provided with a buffer pad at the contact surface of the FPC.

[0018] The application specifically includes the following advantages:

[0019] In the embodiment of the application, through the FPC circuit board and the heat dissipation plate, the FPC circuit board is arranged above the heat dissipation plate, the top four corner positions of the heat dissipation plate are provided with positioning blocks, the inner side of the positioning block is provided with a limiting groove, the four corners of the FPC circuit board extend into the limiting groove and are matched with the limiting groove; the middle part of the heat dissipation plate is embedded with a plurality of metal reinforcing strips arranged side by side; the top of the metal reinforcing strip extends upward and abuts against the bottom surface of the FPC circuit board; the positions opposite to the edges of the positioning block on the two sides of the metal reinforcing strip are respectively provided with elastic supporting blocks; the elastic supporting block is arc-shaped, and the top of the elastic supporting block is in point-plane contact with the FPC circuit board. By arranging the positioning blocks at the four corner positions of the heat dissipation plate and opening the limiting grooves for limiting and fixing the FPC circuit board, the FPC circuit board is connected with the heat dissipation plate as a whole; by embedding the plurality of metal reinforcing strips arranged side by side in the middle part of the heat dissipation plate, on the one hand, the FPC circuit board can be supported, and on the other hand, the FPC circuit board can be prevented from being broken in the stretching and bending process; by arranging the four elastic supporting blocks on the two sides of the metal reinforcing strip, the elastic supporting blocks are respectively opposite to the edges of the positioning block, the fixing of the FPC circuit board is not affected, at the same time, the stress on the FPC circuit board can be reduced through elasticity, the characteristics of the FPC circuit board against pulling and bending breakage are strengthened, and the elastic supporting blocks are arranged in an arc shape, the elastic supporting blocks are in point-plane contact with the FPC circuit board, and the elastic supporting blocks and the metal reinforcing strips are matched with each other, so that the heat dissipation space of the FPC circuit board can be increased, and the heat dissipation performance can be improved. The application can improve the support of the FPC circuit board and the performance of resisting pulling and bending breakage, and improve the heat dissipation performance of the FPC circuit board. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the application, the following will briefly introduce the drawings needed to be used in the description of the application. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Fig. 1 is a sectional view of the edge of the FPC board anti-breakage structure of the utility model;

[0022] Fig. 2 is a sectional view of the middle part of the FPC board anti-breakage structure of the utility model;

[0023] Fig. 3 is a structural schematic view of the heat dissipation plate of the utility model;

[0024] Mark: 10, FPC circuit board; 11, first threaded hole; 20, heat sink; 21, metal reinforcing strip; 211, through hole; 22, shaping strip; 23, elastic support block; 231, arc block; 232, compression spring; 233, limiting block; 24, positioning column; 25, second threaded hole; 26, stepped boss; 27, sliding groove; 30, positioning block; 31, limiting groove; 32, positioning groove; 33, connecting hole; 34, buffer pad. DETAILED DESCRIPTION

[0025] To make the purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below in combination with the drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0026] Referring to Figs. 1-3 , a structure diagram of a FPC board anti-breaking structure of the utility model is shown, which can specifically include the following structures: an FPC circuit board 10 and a heat sink 20, the FPC circuit board 10 is arranged above the heat sink 20, the heat sink 20 is provided with a positioning block 30 at the top of four corners, a limiting groove 31 is formed in the inner side of the positioning block 30, and the four corners of the FPC circuit board 10 extend into the limiting groove 31 and fit with it;

[0027] A plurality of metal reinforcing strips 21 are embedded in the middle of the heat sink 20 and arranged side by side; the top of the metal reinforcing strip 21 extends upward and abuts against the bottom surface of the FPC circuit board 10.

[0028] The two sides of the metal reinforcing strip 21 are respectively provided with elastic support blocks 23 at positions opposite to the edges of the positioning block 30; the elastic support blocks 23 are arc-shaped, and the top of the elastic support blocks 23 is in point-plane contact with the FPC circuit board 10.

[0029] In the embodiment of the present application, through the FPC circuit board 10 and the heat dissipation plate 20, the FPC circuit board 10 is arranged above the heat dissipation plate 20, the top four corner positions of the heat dissipation plate 20 are provided with positioning blocks 30, the inner side of the positioning block 30 is provided with a limiting groove 31, and the four corners of the FPC circuit board 10 extend into the limiting groove 31 and are adapted thereto; a plurality of metal reinforcing strips 21 arranged side by side are embedded in the middle of the heat dissipation plate 20; the top of the metal reinforcing strip 21 extends upward and abuts against the bottom surface of the FPC circuit board 10; the two sides of the metal reinforcing strip 21 are respectively provided with elastic supporting blocks 23 at positions opposite to the edges of the positioning block 30; the elastic supporting block 23 is arc-shaped, and the top of the elastic supporting block 23 is in point-plane contact with the FPC circuit board 10. By arranging the positioning block 30 at the four corner positions of the heat dissipation plate 20 and providing the limiting groove 31 for limiting and fixing the FPC circuit board 10, the FPC circuit board 10 is connected with the heat dissipation plate 20 as a whole; by embedding a plurality of metal reinforcing strips 21 arranged side by side in the middle of the heat dissipation plate 20, on the one hand, the FPC circuit board 10 can be supported, and on the other hand, the FPC circuit board 10 can be pulled or bent to play a reinforcing role, preventing the FPC circuit board 10 from being broken in the stretching and bending process; by arranging four elastic supporting blocks 23 on the two sides of the metal reinforcing strip 21, which are respectively opposite to the edges of the positioning block 30, the fixation of the FPC circuit board 10 is not affected, and at the same time, the stress on the FPC circuit board 10 can be reduced through elasticity, the properties of the FPC circuit board 10 against pulling and bending breakage are strengthened, and the elastic supporting block 23 is arranged in an arc shape, which is in point-plane contact with the FPC circuit board 10, cooperates with the metal reinforcing strip 21, can increase the heat dissipation space of the FPC circuit board 10, and thus improves the heat dissipation performance. The present application can improve the support of the FPC circuit board 10 and the properties of the FPC circuit board 10 against pulling and bending breakage, and at the same time, improves the heat dissipation performance of the FPC circuit board 10.

[0030] In the following, the FPC board anti-breaking structure in the present exemplary embodiment will be further described.

[0031] In the embodiment of the present application, the top four corner positions of the heat dissipation plate 20 are provided with positioning blocks 30, and the inner side of the positioning block 30 is provided with a limiting groove 31, and the four corners of the FPC circuit board 10 extend into the limiting groove 31 and are adapted thereto. The positioning block 30 is composed of a top plate and two vertically connected vertical plates, and the limiting groove 31 limiting the FPC circuit board 10 is formed between the top plate and the two vertical plates, so that after the FPC circuit board 10 is installed between the four positioning blocks 30, it is not easy to be separated therefrom.

[0032] As an example, the FPC circuit board 10 is provided with positioning columns 24 at the four corners; the positioning block 30 is provided with positioning grooves 32 at the bottom, which are opposite to and adapted to the positioning columns 24. By adapting and inserting the positioning columns 24 and the positioning grooves 32, the positioning block 30 can be quickly fixed and limited during installation.

[0033] As an example, the positioning block 30 is provided with connecting holes 33 at the top, which are opposite to the positioning grooves 32 and communicate with the positioning grooves 32. After the positioning grooves 32 of the positioning block 30 are inserted into the positioning columns 24, connecting members can be inserted through the connecting holes 33, so as to connect and fix the positioning block 30 with the heat dissipation plate 20. The connecting members can be bolts.

[0034] As an example, the inner top of the positioning block 30 is provided with a buffer pad 34, which facilitates the abutting and extruding between the FPC circuit board 10 and the top plate of the positioning block 30, and improves the installation stability between the FPC circuit board 10 and the positioning block 30.

[0035] In the embodiment, the middle part of the heat dissipation plate 20 is embedded with a plurality of metal reinforcing strips 21 arranged side by side; the top of the metal reinforcing strip 21 extends upward and abuts against the bottom surface of the FPC circuit board 10. By arranging the metal reinforcing strips 21 in the middle part of the heat dissipation plate 20, the middle part of the FPC circuit board 10 can be supported, so as to prevent the center of the circuit board from being easily bent under external force. Meanwhile, the metal reinforcing strips 21 do not completely contact the bottom surface of the FPC circuit board 10, so that the heat dissipation performance of the FPC circuit board 10 is good. In addition, the metal reinforcing strips 21 can strengthen the pulling or bending area. When the metal reinforcing strips 21 are bent to a certain degree, they cannot be stretched any more. At this time, the metal reinforcing strips 21 will limit the continuous bending of the FPC circuit board 10, so as to prevent the FPC circuit board 10 from being further bent and damaged or broken, thereby avoiding the tearing or breaking of the FPC circuit board 10.

[0036] As an example, a shaped strip 22 is arranged between adjacent metal reinforcing strips 21. By arranging the shaped strips 22 between the metal reinforcing strips 21, the shape of the FPC circuit board 10 can be adjusted and fixed through the shaped strips 22 during the installation of the FPC circuit board 10, so as to avoid the deformation and breakage of the FPC circuit board 10 during use, which affects the use.

[0037] As an example, the bottom of the metal reinforcing strip 21 penetrates through the heat dissipation plate 20 and is flush with the bottom surface thereof, and the metal reinforcing strip 21 is provided with a plurality of through holes 211. Through the above structural design, the metal reinforcing strip 21 and the heat dissipation plate 20 form an integrated structure, and the through holes 211 penetrate through the heat dissipation plate 20, which can further improve the heat dissipation performance of the FPC circuit board 10.

[0038] In the embodiment of the present application, the two sides of the metal reinforcing strip 21 are respectively provided with elastic supporting blocks 23 at positions opposite to the edges of the positioning block 30. The elastic supporting blocks 23 are arranged at positions opposite to the edges of the positioning block 30, so that the elastic supporting blocks 23 can support the FPC circuit board 10 at the four corner positions without blocking the installation. The elastic supporting blocks 23 are arc-shaped, and the top of the elastic supporting blocks 23 is in point-surface contact with the FPC circuit board 10. The arc-shaped elastic supporting blocks 23 are in point-surface contact with the FPC circuit board 10, which can greatly reduce the contact area with the FPC circuit board 10 without affecting the support, thereby improving the heat dissipation performance of the FPC circuit board 10.

[0039] As an example, the elastic supporting block 23 includes an arc-shaped block 231 and a compression spring 232, one end of the compression spring 232 is fixedly connected to the inner top center point of the arc-shaped block 231, and the other end of the compression spring 232 is fixedly connected to the heat dissipation plate 20, i.e., the compression spring 232 is opposite to the stress point of the arc-shaped block 231, which can improve the support of the FPC circuit board 10 and reduce the stress through elastic force, thereby strengthening the anti-pulling and bending fracture characteristics of the FPC circuit board 10. The two ends of the arc-shaped block 231 are provided with limiting blocks 233; the heat dissipation plate 20 is provided with a sliding groove 27 at positions opposite to the two ends of the arc-shaped block 231, and the limiting blocks 233 are slidingly limited in the sliding groove 27. By arranging the limiting blocks 233 and the sliding groove 27, the arc-shaped block 231 can be limited in the sliding groove 27, so that the arc-shaped block 231 is not separated from the heat dissipation plate 20; at the same time, the limiting blocks 233 are slidingly connected in the sliding groove 27, and the length of the limiting blocks 233 is slightly smaller than the length of the sliding groove 27. When the arc-shaped block 231 is stressed, the arc-shaped block 231 is compressed downward, and the limiting blocks 233 at the two ends of the arc-shaped block 231 can move in the sliding groove 27.

[0040] As an example, the FPC circuit board 10 is provided with a first threaded hole 11 near the positioning block 30, which penetrates through the positioning block 30; the top of the positioning block 30 is provided with a second threaded hole 25, which is opposite to the first threaded hole 11 and has the same inner diameter. By arranging the first threaded hole 11 and the second threaded hole 25, the FPC circuit board 10 and the heat dissipation plate 20 can be connected and fixed by penetrating bolts, thereby improving the connection stability between the FPC circuit board 10 and the heat dissipation plate 20.

[0041] As an example, the two ends of the heat dissipation plate 20 are stepped bosses 26, and the positioning blocks 30 are arranged on the stepped bosses 26. By arranging the stepped bosses 26 at the two ends, a groove is formed in the middle of the heat dissipation plate 20, and the elastic supporting blocks 23 and the metal reinforcing strips 21 are arranged in the groove, so that the height of the two can be increased, especially the elastic height of the elastic supporting blocks 23, thereby improving the elastic force and the bending fracture resistance.

[0042] Although the preferred embodiments of the present application have been described, those skilled in the art, once they know the basic creative concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to include the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0043] Finally, it should also be noted that in this paper, relational terms such as first and second are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or terminal device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or terminal device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or terminal device including the element.

[0044] The above provides a detailed introduction to the FPC board anti-fracture structure provided by the present application, and the principles and implementation modes of the present application are described in this paper. The above description of the embodiments is only used to help understand the method of the present application and its core idea; at the same time, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed; in view of the above, the content of the specification should not be understood as a limitation of the present application.

Claims

1. An FPC board breakage prevention structure characterized by comprising: The FPC circuit board is arranged above the heat dissipation plate. The top of the heat dissipation plate is provided with positioning blocks at four corners. The middle of the heat dissipation plate is embedded with a plurality of metal reinforcing strips arranged side by side. The top of the metal reinforcing strip extends upward and abuts against the bottom surface of the FPC circuit board.

2. The FPC board breakage prevention structure according to claim 1, characterized by, The two sides of the metal reinforcing strip are respectively provided with elastic supporting blocks opposite to the edges of the positioning blocks.

3. The FPC board breakage prevention structure according to claim 2, characterized by, The top of the elastic supporting block is in point-plane contact with the FPC circuit board.

4. The FPC board breakage prevention structure according to claim 1, characterized by The four corners of the FPC circuit board are provided with positioning columns.

5. The FPC board breakage prevention structure according to claim 1, characterized by, The bottom of the positioning block is provided with a positioning slot opposite to the positioning column.

6. The FPC board breakage prevention structure according to claim 1, characterized by The top of the positioning block is provided with a connecting hole opposite to the positioning slot.

7. The FPC board breakage prevention structure according to claim 1, characterized by The connecting hole is in communication with the positioning slot.

8. The FPC board breakage prevention structure according to claim 1, characterized by, The metal reinforcing strips are provided with a plurality of through holes.

9. The FPC board breakage prevention structure according to claim 1, characterized by, The FPC circuit board is provided with a first threaded hole penetrating the positioning block. The top of the positioning block is provided with a second threaded hole opposite to the first threaded hole. The two ends of the heat dissipation plate are provided with stepped bosses. The elastic supporting block is provided with an arc-shaped block and a compression spring. The top of the positioning block is provided with a buffer pad.

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