CN111478076B

CN111478076B - Flexible circuit board

Info

Publication number: CN111478076B
Application number: CN202010320569.1A
Authority: CN
Inventors: 孙志永
Original assignee: Jiangsu Ha Ha She Information Technology Co Ltd
Current assignee: Jiangsu Ha Ha She Information Technology Co Ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2021-10-26
Anticipated expiration: 2040-04-22
Also published as: CN111478076A

Abstract

The invention belongs to the technical field of circuit boards, and particularly relates to a flexible circuit board which comprises a circuit board main body, wherein an electronic component is arranged in the circuit board main body; mounting plates are fixedly mounted at two ends of the circuit board main body; fixing bolts are inserted at two ends of the mounting plate; the front surface of one of the mounting plates is provided with a mounting groove; the back of the inner wall of the mounting groove is fixedly connected with a metal pin; the invention solves the problem that the connecting plug-in unit is inconvenient to align with the metal pin during manual operation by workers by arranging the positioning groove, the supporting chute, the supporting groove, the limiting groove, the sliding groove, the T-shaped sliding block, the T-shaped supporting plate and the protective baffle, reduces the difficulty of plugging the connecting plug-in unit by the workers, avoids the problem that the metal pin is damaged due to the fact that the connecting plug-in unit is not aligned with the metal pin, plays a role of indirectly protecting the metal pin and avoids causing unnecessary loss.

Description

Flexible circuit board

Technical Field

The invention belongs to the technical field of circuit boards, and particularly relates to a flexible circuit board.

Background

The flexible circuit board is a high-reliability and flexible printed circuit board, which is called a flexible board for short, has the characteristics of high wiring density, light weight and thin thickness, and is mainly used in products such as mobile phones, notebook computers, PDA (personal digital assistant), digital cameras, liquid crystal display modules LCM (liquid crystal display module) and the like.

Some technical solutions of flexible circuit boards also appear in the prior art, for example, a chinese patent with application number 201711304482.X discloses a flexible circuit board, which includes a flexible substrate film, a plurality of metal wires disposed on the substrate film, a cover film covering a portion of the metal wires, and a gold finger exposing an edge portion of the metal wires; and one side of the golden finger is provided with a mark point for pressing and pointing.

In the prior art, when a worker manually connects the metal pin of the connecting plug-in and the flexible circuit board, the situation of inaccurate butt joint is easily caused, the connecting plug-in can generate large extrusion force to the metal pin, and the worker is not aware of the fact that the metal pin is excessively damaged by force, so that unnecessary loss is caused.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems that in the prior art, when a worker manually connects a connecting plug-in with a metal pin of a flexible circuit board in the installation process, the butt joint is prone to being inaccurate, the connecting plug-in can generate large extrusion force on the metal pin, and the metal pin is damaged due to excessive force without being realized by the worker, so that unnecessary loss is caused.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to a flexible circuit board, which comprises a circuit board main body, wherein an electronic component is arranged in the circuit board main body; mounting plates are fixedly mounted at two ends of the circuit board main body; fixing bolts are inserted at two ends of the mounting plate; the front surface of one of the mounting plates is provided with a mounting groove; the back of the inner wall of the mounting groove is fixedly connected with a metal pin; a connecting plug-in unit matched with the metal plug pin is arranged in front of the mounting groove; both sides of the connecting plug-in are connected with wires; the rear ends of the metal pins are electrically connected with the electronic assembly; positioning grooves matched with the connecting plug-in units are formed in the two sides of the inner wall of the mounting groove; supporting sliding grooves are formed in the two ends of the bottom of the inner wall of the mounting groove; the supporting sliding groove comprises a supporting groove, a sliding groove and a limiting groove; the inner wall of the supporting groove is connected with a T-shaped sliding block in a sliding manner; the top of the T-shaped sliding block penetrates into the sliding groove and the limiting groove from bottom to top in sequence; the surface of the T-shaped sliding block is sleeved with a spring; the inner wall of the positioning groove is connected with a T-shaped supporting plate in a sliding manner; the T-shaped supporting plate is connected to the surface of the T-shaped sliding block in a sliding mode; two ends of the spring are respectively and fixedly connected to the top of the T-shaped sliding block base and the bottom of the T-shaped supporting plate; the top end of the T-shaped supporting plate penetrates out of the limiting groove; the tops of the two T-shaped supporting plates are fixedly connected with a protective baffle together; the front surface of the protective baffle is provided with an L-shaped positioning surface; when the connector is in work, if the connector is directly and manually sleeved on the surface of the metal pin, the connector is easy to be misaligned, the metal pin can generate larger extrusion force, and because workers do not realize that the metal pin is damaged due to excessive force, unnecessary loss is caused, when the connector is connected by plugging, the workers can not directly contact the metal pin by arranging the L-shaped positioning surface, the workers need to be placed on the L-shaped positioning surface of the protective baffle firstly and then press the L-shaped positioning surface, so that the two ends of the protective baffle press the T-shaped supporting plate, the T-shaped supporting plate slides on the surface of the T-shaped sliding block and synchronously compresses the spring, the T-shaped supporting plate is connected to the inner wall of the sliding groove in a sliding manner, at the moment, the two ends of the connector can be just connected to the inner wall of the positioning groove and then slide along the inner wall of the positioning groove, and the connector is accurately sleeved on the surface of the metal pin, the problem of alignment not convenient for when having solved staff manual operation has reduced staff plug-in components's the degree of difficulty of plug-in components, avoids participating in the problem that the metal is participated in because connecting plug-in components and metal are participated in the misalignment, has played the effect that indirect protection metal is participated in, avoids causing the unnecessary loss.

Preferably, the positions of the two sides of the top of the mounting plate, which correspond to the edges of the mounting groove, are fixedly connected with connecting pins; the surface of the connecting pin is sleeved with a spring; a connecting plate is connected to the surface of the connecting pin in a sliding manner; two ends of the spring are respectively and fixedly connected to the bottom of the connecting plate and the top of the mounting plate; the bottom of the connecting plate is fixedly connected with a positioning pin at a position corresponding to the mounting groove; the bottom end of the positioning pin is provided with an inclined plane; the during operation, participate in with the metal at the connection plug-in components and be connected the completion back, can be promoted mounting groove inner wall rear side when guard flap, if not advance line location to guard flap, in the practical application process, guard flap can take place to rock, the rear side to connecting plug-in components produces the effort, influence the stability that connection plug-in components and metal participate in the connection, through setting up the locating pin, when guard flap passes through the locating pin, guard flap can push through the locating pin along the inclined plane of locating pin bottom, under the reset action of spring, the locating pin openly carries on spacingly to guard flap, guard flap prevents to cross the locating pin, thereby can prevent that guard flap from producing the problem of collision at circuit board practical application in-process to connecting plug-in components, thereby avoid influencing the stability that connection plug-in components and metal participate in the connection.

Preferably, a positioning bolt is inserted at the front end of the top of the connecting plate, a support sleeve is fixedly connected to the top of the mounting plate corresponding to the positioning bolt, the support sleeve is communicated with the inside of the positioning groove, and the positioning bolt is in threaded connection with the inner wall of the support sleeve; when the mobile phone or the computer is in operation, the whole circuit board can shake along with the mobile phone or the computer body in the actual application process, the connecting plug-in and the metal pins can be separated from each other in the long-term shaking process, the unstable connection condition is caused, and the normal operation of the mobile phone or the computer is influenced; and positioning bolt has carried out the location to the connecting plate, avoids the connecting plate to upwards squint at the in-process that rocks, and then maintains the locating pin and spacing to the guard flap is stable.

Preferably, a drive plate is sleeved on the surface of the positioning bolt, a circuit clamping plate is fixedly connected to the bottom of the drive plate, circuit fixing seats are fixedly connected to the two sides of the front surface of the mounting plate, corresponding to the positions of the circuit clamping plates, and the back surface of the circuit clamping plate is connected with the top of the circuit fixing seat through an elastic telescopic mechanism; the during operation, the side of connecting plug-in components can be connected with the wire, if do not have the mounting to arrange, the wire can be in disorder very much, need the staff to adopt insulating tape to bind the location, and is comparatively troublesome, through setting up circuit splint and circuit fixing base, when the in-process that the positioning bolt was screwed up, can promote the drive plate and move down, the drive plate drives circuit splint and the laminating of circuit fixing base top in step, arranges the wire, need not the staff and adjusts easy to assemble with the help of insulating tape.

Preferably, the elastic telescopic mechanism comprises a supporting rod, the supporting rod is fixedly connected to the top of the line fixing seat, a connecting sleeve is connected to the surface of the supporting rod in a sliding mode, the connecting sleeve is fixedly connected to the back face of the line clamping plate, a spring is sleeved on the surface of the supporting rod, and two ends of the spring are fixedly connected to the bottom of the connecting sleeve and the top of the line fixing seat respectively; the during operation, in the process of taking apart the connecting plug-in components and participating in with the metal, the wire still centre gripping needs the staff to dial manually between circuit splint and circuit fixing base, just can take out the wire, comparatively troublesome, through setting up the bracing piece, the adapter sleeve, a spring, it carries out elastic support to circuit splint to have played, at the in-process of unscrewing positioning bolt, under the supporting role of spring, circuit splint can upwards be promoted by the adapter sleeve, automatically separate circuit splint and circuit fixing base, make things convenient for the staff to pull down the wire, made things convenient for the staff to insert connecting plug-in components from the metal and pulled down.

Preferably, the inner wall of the groove at the bottom of the circuit clamping plate and the inner wall of the groove at the top of the circuit fixing seat are both glued with rubber clamping pads; during operation, the wire can't be fixed a position between circuit splint and circuit fixing base, can take place to rock in the centre gripping space, causes the unstability of wire link easily, through setting up the rubber centre gripping pad, can avoid rocking of wire with the flexible centre gripping of wire, maintains the stability that wire and connecting plug-in components are connected.

The invention has the following beneficial effects:

1. according to the flexible circuit board, the positioning groove, the supporting chute, the supporting groove, the limiting groove, the sliding groove, the T-shaped sliding block, the T-shaped supporting plate and the protective baffle are arranged, so that the problem that a connecting plug-in and a metal pin are not convenient to align when a worker manually operates is solved, the difficulty of inserting and connecting the plug-in by the worker is reduced, the problem that the metal pin is damaged due to the fact that the connecting plug-in and the metal pin are not aligned is avoided, the function of indirectly protecting the metal pin is achieved, and unnecessary loss is avoided.

2. According to the flexible circuit board, the connecting pin, the connecting plate, the positioning pin, the positioning bolt and the supporting sleeve are arranged, so that the problem that the protective baffle collides with the connecting plug-in the actual application process of the circuit board can be prevented, and the connection stability of the connecting plug-in and the metal pins is prevented from being influenced; the positioning bolt can move downwards under the action of the internal thread of the supporting sleeve and is in close contact with the top of the connecting plug-in unit to position, so that the connecting plug-in unit is prevented from sliding in the working process, and the stability of connection between the connecting plug-in unit and the metal pin is maintained.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is an enlarged view of a portion A of FIG. 1;

FIG. 3 is a perspective view of the protective shield, T-shaped slider and T-shaped support plate of the present invention after being connected in partial cross-section;

FIG. 4 is a perspective view of the connection insert of the present invention;

FIG. 5 is a perspective view of the circuit board body of the present invention partially in section;

FIG. 6 is a partial enlarged view of portion B of FIG. 5;

FIG. 7 is a side view of the present invention;

FIG. 8 is an enlarged view of a portion C of FIG. 7;

in the figure: the circuit board comprises a circuit board main body 1, an electronic component 2, a mounting plate 3, a mounting groove 4, a metal pin 5, a connecting plug-in 6, a positioning groove 7, a supporting sliding groove 8, a supporting groove 81, a limiting groove 82, a sliding groove 83, a T-shaped sliding block 9, a T-shaped supporting plate 10, a protective baffle plate 11, a connecting pin 12, a connecting plate 13, a positioning pin 14, a positioning bolt 15, a supporting sleeve 16, a driving plate 17, a circuit clamping plate 18, a circuit fixing seat 19, an elastic telescopic mechanism 20, a supporting rod 201, a connecting sleeve 202 and a rubber clamping pad 21.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 8, the flexible circuit board according to the present invention includes a circuit board main body 1, wherein an electronic component 2 is disposed inside the circuit board main body 1; the two ends of the circuit board main body 1 are fixedly provided with mounting plates 3; fixing bolts are inserted at two ends of the mounting plate 3; the front surface of one of the mounting plates 3 is provided with a mounting groove 4; the back of the inner wall of the mounting groove 4 is fixedly connected with a metal pin 5; a connecting plug-in 6 matched with the metal pin 5 is arranged in front of the mounting groove 4; both sides of the connecting plug-in 6 are connected with wires; the rear ends of the metal pins 5 are electrically connected with the electronic component 2; positioning grooves 7 matched with the connecting plug-in units 6 are formed in the two sides of the inner wall of the mounting groove 4; two ends of the bottom of the inner wall of the mounting groove 4 are both provided with supporting sliding grooves 8; the supporting chute 8 comprises a supporting groove 81, a sliding groove 82 and a limiting groove 83; the inner wall of the supporting groove 81 is connected with a T-shaped sliding block 9 in a sliding manner; the top of the T-shaped sliding block 9 sequentially penetrates into the sliding groove 82 and the limiting groove 83 from bottom to top; a spring is sleeved on the surface of the T-shaped sliding block 9; the inner wall of the positioning groove 7 is connected with a T-shaped supporting plate 10 in a sliding manner; the T-shaped supporting plate 10 is connected on the surface of the T-shaped sliding block 9 in a sliding mode; two ends of the spring are respectively and fixedly connected to the top of the base of the T-shaped sliding block 9 and the bottom of the T-shaped supporting plate 10; the top end of the T-shaped support plate 10 penetrates through the limiting groove 83; the tops of the two T-shaped supporting plates 10 are fixedly connected with a protective baffle plate 11; the front surface of the protective baffle 11 is provided with an L-shaped positioning surface; when the connector 6 is directly and manually sleeved on the surface of the metal pin 5, the connector 6 is easily misaligned, the metal pin 5 generates a large extrusion force, and the worker is unaware of the fact that the metal pin 5 is damaged due to excessive force, which causes unnecessary loss, by providing the L-shaped positioning surface, the worker cannot directly contact the metal pin 5 when inserting the connector 6, the worker needs to first lay the L-shaped positioning surface of the guard baffle 11 and then press the L-shaped positioning surface, so that the two ends of the guard baffle 11 press the T-shaped support plate 10, the T-shaped support plate 10 slides on the surface of the T-shaped slider 9 and synchronously compresses the spring, so that the T-shaped support plate 10 is slidably connected to the inner wall of the sliding groove 82, at the moment, the two ends of the connector 6 can be slidably connected to the inner wall of the positioning groove 7 exactly, and then slide along the inner wall of the positioning groove 7, the connecting plug-in unit 6 is accurately sleeved on the surface of the metal plug-in unit 5, the problem that the metal plug-in unit 6 is not convenient to align when being manually operated by a worker is solved, the difficulty of inserting the connecting plug-in unit 6 by the worker is reduced, the problem that the metal plug-in unit 5 is damaged due to the fact that the connecting plug-in unit 6 and the metal plug-in unit 5 are not aligned is avoided, the effect of indirectly protecting the metal plug-in unit 5 is achieved, and unnecessary loss is avoided.

As an embodiment of the invention, the positions of the two sides of the top of the mounting plate 3 corresponding to the edges of the mounting groove 4 are both fixedly connected with connecting pins 12; a spring is sleeved on the surface of the connecting pin 12; a connecting plate 13 is connected on the surface of the connecting pin 12 in a sliding way; two ends of the spring are respectively and fixedly connected to the bottom of the connecting plate 13 and the top of the mounting plate 3; the bottom of the connecting plate 13 is fixedly connected with a positioning pin 14 corresponding to the position of the mounting groove 4; the bottom end of the positioning pin 14 is provided with an inclined plane; in operation, after the connecting plug 6 is connected with the metal pins 5, when the guard 11 is pushed to the rear side of the inner wall of the installation groove 4, if the protective baffle 11 is not positioned, in the practical application process, the protective baffle 11 will shake, acting on the rear side of the connection insert 6, affecting the stability of the connection insert 6 with the metal pins 5, by providing the positioning pins 14, when the guard plate 11 passes through the positioning pin 14, the guard plate 11 will push through the positioning pin 14 along the slope of the bottom end of the positioning pin 14, under the reset action of the spring, the positioning pin 14 limits the front surface of the protective baffle plate 11, so as to prevent the protective baffle plate 11 from crossing over the positioning pin 14, therefore, the problem that the protective baffle 11 collides with the connecting plug-in unit 6 in the actual application process of the circuit board can be prevented, and the connection stability of the connecting plug-in unit 6 and the metal pins 5 is prevented from being influenced.

As an embodiment of the present invention, a positioning bolt 15 is inserted into the front end of the top of the connecting plate 13, a support sleeve 16 is fixedly connected to the top of the mounting plate 3 at a position corresponding to the positioning bolt 15, the support sleeve 16 is communicated with the inside of the positioning slot 7, and the positioning bolt 15 is in threaded connection with the inner wall of the support sleeve 16; when the mobile phone or computer plug-in connector works, the whole mobile phone or computer body can shake in the practical application process of the circuit board, the connecting plug-in component 6 and the metal plug-in pin 5 can be separated from each other in the long-term shaking process, so that unstable connection can be caused, and the normal operation of the mobile phone or computer can be influenced, by arranging the positioning bolt 15, after the plugging is completed, the positioning bolt 15 is screwed, the positioning bolt 15 can move downwards under the action of the internal thread of the supporting sleeve 16 until the positioning bolt is in close contact with the top of the connecting plug-in component 6, the positioning is completed, the connecting plug-in component 6 is prevented from sliding in the working process, and the connection stability of the connecting plug-in component 6 and the metal plug-in pin 5 is maintained; and positioning bolt 15 has fixed a position connecting plate 13, avoids connecting plate 13 upwards squinting at the in-process of rocking, and then maintains that locating pin 14 is stable spacing to guard flap 11.

As an embodiment of the present invention, a driving plate 17 is sleeved on a surface of the positioning bolt 15, a circuit clamping plate 18 is fixedly connected to a bottom of the driving plate 17, circuit fixing seats 19 are fixedly connected to positions, corresponding to the circuit clamping plate 18, of two sides of a front surface of the mounting plate 3, and a back surface of the circuit clamping plate 18 is connected to a top of the circuit fixing seat 19 through an elastic telescopic mechanism 20; the during operation, the side of connecting plug-in components 6 can be connected with the wire, if there is not the mounting when arranging, the wire can be in disorder very much, need the staff to adopt insulating adhesive tape to bind the location, it is comparatively troublesome, through setting up circuit splint 18 and circuit fixing base 19, in-process when positioning bolt 15 is screwed up, can promote drive plate 17 and remove downwards, drive plate 17 drives circuit splint 18 and the laminating of circuit fixing base 19 top in step, arrange the wire, need not the staff and adjust with the help of insulating adhesive tape, easy to assemble.

As an embodiment of the present invention, the elastic telescopic mechanism 20 includes a supporting rod 201, the supporting rod 201 is fixedly connected to the top of the line fixing seat 19, a connecting sleeve 202 is slidably connected to the surface of the supporting rod 201, the connecting sleeve 202 is fixedly connected to the back of the line clamping plate 18, a spring is sleeved on the surface of the supporting rod 201, and two ends of the spring are respectively and fixedly connected to the bottom of the connecting sleeve 202 and the top of the line fixing seat 19; the during operation, in the process of taking apart connecting plug-in components 6 and participating in 5 with the metal, the wire still centre gripping is between circuit splint 18 and circuit fixing base 19, need the staff manual to dial open, just can take out the wire, it is comparatively troublesome, through setting up bracing piece 201, adapter sleeve 202, a spring, it carries out elastic support to circuit splint 18 to have played, at the in-process of unscrewing positioning bolt 15, under the supporting role of spring, circuit splint 18 can upwards be promoted by adapter sleeve 202, separate circuit splint 18 and circuit fixing base 19 automatically, make things convenient for the staff to pull down the wire, made things convenient for the staff to pull down connecting plug-in components 6 from participating in 5 from the metal.

As an embodiment of the present invention, the inner wall of the bottom groove of the line clamping plate 18 and the inner wall of the top groove of the line fixing seat 19 are both glued with rubber clamping pads 21; during operation, the wire can't be fixed a position between circuit splint 18 and circuit fixing base 19, can take place to rock in the centre gripping space, causes the unstability of wire link easily, through setting up rubber centre gripping pad 21, can avoid rocking of wire with the flexible centre gripping of wire, maintains the stability that wire and connecting plug-in components 6 are connected.

The specific working process is as follows:

when the connector 6 is directly and manually sleeved on the surface of the metal pin 5, the connector 6 is easily misaligned, the metal pin 5 generates a large extrusion force, and the worker is unaware of the fact that the metal pin 5 is damaged due to excessive force, which causes unnecessary loss, by providing the L-shaped positioning surface, the worker cannot directly contact the metal pin 5 when inserting the connector 6, the worker needs to first lay the L-shaped positioning surface of the guard baffle 11 and then press the L-shaped positioning surface, so that the two ends of the guard baffle 11 press the T-shaped support plate 10, the T-shaped support plate 10 slides on the surface of the T-shaped slider 9 and synchronously compresses the spring, so that the T-shaped support plate 10 is slidably connected to the inner wall of the sliding groove 82, at the moment, the two ends of the connector 6 can be slidably connected to the inner wall of the positioning groove 7 exactly, and then slide along the inner wall of the positioning groove 7, the connecting plug-in unit 6 is accurately sleeved on the surface of the metal plug-in unit 5, the problem that the metal plug-in unit 6 is not convenient to align when being manually operated by a worker is solved, the difficulty of inserting the connecting plug-in unit 6 by the worker is reduced, the problem that the metal plug-in unit 5 is damaged due to the fact that the connecting plug-in unit 6 and the metal plug-in unit 5 are not aligned is avoided, the effect of indirectly protecting the metal plug-in unit 5 is achieved, and unnecessary loss is avoided.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A flexible circuit board comprises a circuit board main body (1), characterized in that an electronic component (2) is arranged inside the circuit board main body (1); mounting plates (3) are fixedly mounted at two ends of the circuit board main body (1); fixing bolts are inserted into the two ends of the mounting plate (3); the front surface of one of the mounting plates (3) is provided with a mounting groove (4); the back of the inner wall of the mounting groove (4) is fixedly connected with a metal pin (5); a connecting plug-in (6) matched with the metal plug pin (5) is arranged in front of the mounting groove (4); both sides of the connecting plug-in (6) are connected with wires; the rear ends of the metal pins (5) are electrically connected with the electronic component (2); positioning grooves (7) matched with the connecting plug-in units (6) are formed in the two sides of the inner wall of the mounting groove (4); two ends of the bottom of the inner wall of the mounting groove (4) are provided with supporting sliding grooves (8); the supporting sliding groove (8) comprises a supporting groove (81), a sliding groove (82) and a limiting groove (83); the inner wall of the supporting groove (81) is connected with a T-shaped sliding block (9) in a sliding way; the top of the T-shaped sliding block (9) penetrates into a sliding groove (82) and a limiting groove (83) from bottom to top in sequence; a spring is sleeved on the surface of the T-shaped sliding block (9); the inner wall of the positioning groove (7) is connected with a T-shaped supporting plate (10) in a sliding manner; the T-shaped supporting plate (10) is connected to the surface of the T-shaped sliding block (9) in a sliding mode; two ends of the spring are respectively and fixedly connected to the top of the base of the T-shaped sliding block (9) and the bottom of the T-shaped supporting plate (10); the top end of the T-shaped support plate (10) penetrates through the limiting groove (83); the tops of the two T-shaped supporting plates (10) are fixedly connected with a protective baffle (11) together; the front surface of the protective baffle (11) is provided with an L-shaped positioning surface.

2. A flexible circuit board according to claim 1, wherein: the positions of the two sides of the top of the mounting plate (3) corresponding to the edges of the mounting groove (4) are fixedly connected with connecting pins (12); a spring is sleeved on the surface of the connecting pin (12); a connecting plate (13) is connected to the surface of the connecting pin (12) in a sliding manner; two ends of the spring are respectively and fixedly connected to the bottom of the connecting plate (13) and the top of the mounting plate (3); the bottom of the connecting plate (13) is fixedly connected with a positioning pin (14) corresponding to the position of the mounting groove (4); the bottom end of the positioning pin (14) is provided with an inclined plane.

3. A flexible circuit board according to claim 2, wherein: the front end of the top of the connecting plate (13) is inserted with a positioning bolt (15), the top of the mounting plate (3) is fixedly connected with a support sleeve (16) corresponding to the positioning bolt (15), the support sleeve (16) is communicated with the inside of the positioning groove (7), and the positioning bolt (15) is in threaded connection with the inner wall of the support sleeve (16).

4. A flexible circuit board according to claim 3, wherein: the surface of positioning bolt (15) has cup jointed drive plate (17), the bottom fixedly connected with circuit splint (18) of drive plate (17), the equal fixedly connected with circuit fixing base (19) in position that mounting panel (3) positive both sides correspond circuit splint (18), the back of circuit splint (18) is passed through elastic telescoping mechanism (20) and is connected with circuit fixing base (19) top.

5. The flexible circuit board of claim 4, wherein: elastic telescoping mechanism (20) includes bracing piece (201), bracing piece (201) fixed connection is at circuit fixing base (19) top, sliding connection has adapter sleeve (202) on the surface of bracing piece (201), adapter sleeve (202) fixed connection is at the circuit splint (18) back, the spring has been cup jointed on the surface of bracing piece (201), fixed connection is respectively at adapter sleeve (202) bottom and circuit fixing base (19) top at the both ends of spring.

6. The flexible circuit board of claim 4, wherein: and rubber clamping pads (21) are respectively glued on the inner wall of the groove at the bottom of the line clamping plate (18) and the inner wall of the groove at the top of the line fixing seat (19).