JP2000182698A - Terminal for flexible printed board - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal capable of minimizing machining applied to a flexible printed board (FPC) and generating stable connections both mechanical and electrical. SOLUTION: A flexible printed board (FPC) 2 is placed on the installation surface 10a of a terminal 101, makes surface contact with a barrel 11 by a pressure applied by the peripheral surface of the barrel 11 in cylindrical shape, and is prevented from being damaged so that a good electrical and mechanical connections with the barrel 11 is established. The terminal 101 is connectable without cutting out the connection part of the FPC 2 in a tongue form. Because no caulking is made in the longitudinal and perpendicular directions, the spacing of terminals is not rectricted by a caulking jig in use. The terminal 101 is of simple structure, and it is easy for a number of terminals to be connected with the same FPC 2 at one time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a terminal for electrically and mechanically connecting to a flexible printed circuit board.

[0002]

2. Description of the Related Art Conventionally, a flexible printed circuit board (hereinafter abbreviated as FPC) used for a membrane switch.
As a structure for electrically and mechanically connecting an electric signal from a lead to an external line for leading out the electric signal to the outside, for example, a terminal for a flexible printed board disclosed in Japanese Patent Application Laid-Open No. 10-275624 is known. FIG. 10 shows the structure.

[0003] A terminal 9 shown in FIG.
0a has a long plate-shaped base 90 on which the FPC 2 is placed,
A male terminal 99 is attached to one end of the base 90 in the x direction (longitudinal direction).
Has a plurality of (two on each side) barrels (bend beams) 91 at the other end. The barrel 91 extends from both sides of the base 90 in the y direction substantially perpendicular to the x direction, is formed in a cylindrical shape inside, and presses the FPC 2 with an outer peripheral surface 91a. The terminal 99 is used for electrical connection with an external connector or the like. Serrations (recesses) 92 are formed in the y-direction at positions corresponding to the respective barrels 91 on the installation surface 90a of the base 90. When a tensile load acts on the FPC 2 from the outside in the x-direction, the FPC 2 is moved. The pressed barrel 91 is locked to the serration 92.

In the terminal 9 shown in FIG. 10, a contact spring (contact member) 93, a holder (locking portion) 94, and a cover (lid) 98 are provided between the barrel 91 and the terminal 99. I have. Contact spring 93
Has a plate-like shape, is formed by bending from one side of the base 90 in the y direction, and has a fixed end 95 at one end and a free end 97 at the other end. The contact spring 93 is disposed so as to face the base 90, and is bent and formed to have a convex portion 96 protruding in a “<” shape on the base 90 side. When the protrusion 96 presses the FPC 2, the FPC 2 and the terminal 9 are electrically connected. Further, in order to obtain a good electrical connection between the FPC 2 and the terminal 9, a hole (not shown) is provided in the base 90 at a position corresponding to the projection 96 of the contact spring 93. The contact spring 93 has a projection 97a on the free end 97 side for engaging with the holder 94 in the y direction. The holder 94 extends from both sides of the base 90 in the y direction and is bent substantially perpendicularly to the base 90, and is provided with a locking hole 94 a for locking the projection 97 a of the contact spring 93. Have been. The cover 98 extends from a side different from the side on which the contact spring 93 in the y direction of the base 90 extends, and is formed to be bent so as to support the contact spring 93 from a side different from the installation surface 90a.

[0005]

However, FIG.
In the structure shown in FIG. 1, barrels 9 provided on both sides of the base 90 are provided.
Due to the crimping by 1, the FPC needs to be cut into a shape in which the connection portion with the terminal 9 projects in a tongue shape. For this reason, it is easy to bend locally during handling, and there is a possibility of damage such as cracks or chips. In addition, when the barrel 91 is crimped to the FPC, a crimping device must be inserted between two adjacent tongue-shaped connecting portions. There was a limit on the interval. Further, since the crimping portion formed by the barrel 91 of the terminal is formed in the longitudinal direction of the terminal, a contact spring 93 which is an auxiliary crimping portion in which the crimping portion is formed in a direction perpendicular to the side surface is required.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to simplify the manufacturing in view of the above-mentioned problems, since it is not necessary to perform a process of forming a connecting portion of an FPC as a protruding piece. Another object is to reduce the size of the terminal by reducing the width and interval of the connection portion.

[0007]

According to a first aspect of the present invention, there is provided a base having a mounting surface on which a flexible printed circuit board is mounted, and a base comprising: The flexible printed circuit board has a bent beam portion having a strip formed in the longitudinal direction of the substrate by punching out the contour leaving one side close to the installation surface and being bent to face the installation surface. It is characterized by being fixed by crimping on the surface of the device and the installation surface. As a result, the curved beam portion comes into contact with the FPC on the surface, and stress concentration on the FPC is reduced. Since the bent beam portion is formed by bending the strip formed in the longitudinal direction, the FPC may be inserted between the bent beam portion and the installation surface, so that the FPC is not required and the manufacturing is facilitated. . In addition, since the crimping part by this surface contact is formed in a direction substantially perpendicular to the longitudinal direction of the terminal, the mechanical fixing strength is large, reliable holding and reliable electrical contact are possible, and an auxiliary crimping part is required. And not.

[0008] According to the means described in claim 2, according to claim 1,
In the terminal for a flexible printed circuit board described in the above, the bent beam portion, a strip piece is formed in a cylindrical shape inside facing the installation surface, the flexible printed circuit board is fixed by crimping on the outer peripheral surface of the bent beam portion and the installation surface It is characterized by having. That is, the same effect as the first aspect is obtained, and the outer peripheral surface of the bent beam portion comes into surface contact with the FPC, so that stress concentration on the FPC is reduced.

According to the third aspect of the present invention, a first aspect is provided.
In the terminal for a flexible printed circuit board described in (1), the bending beam portion is characterized in that the strip is turned to the installation surface side such that the surface thereof faces the installation surface. That is, the same effect as in the first aspect is obtained, and the surface before bending, which is the same side as the installation surface, is bent and formed as a bent beam portion, so that the surface contacts the FPC and stress concentration on the FPC occurs. Is alleviated.

According to the fourth aspect of the present invention, a second aspect is provided.
Alternatively, in the terminal for a flexible printed circuit board according to claim 3, the installation surface is formed to be convex in the longitudinal direction at a position corresponding to the bent beam portion on the installation surface. As a result, the FPC at the portion sandwiched between the outer peripheral surface of the bent beam portion and the installation surface is held obliquely from the horizontal plane, and when a tensile stress acts on the FPC from the outside in the longitudinal direction, the stress applied to the FPC is reduced. The concentration can be alleviated and the FPC can be effectively prevented from coming off.

According to the means described in claim 5, according to claim 2,
Alternatively, in the terminal for a flexible printed board according to the third aspect, a groove is provided at a position corresponding to the bent beam portion on the installation surface in a direction substantially perpendicular to a longitudinal direction on the installation surface. Thereby, when the FPC sandwiched between the outer peripheral surface of the bent beam portion and the groove portion of the installation surface, when tensile stress acts on the FPC from outside in the longitudinal direction,
Stress concentration on the FPC can be reduced, and the FPC can be effectively prevented from coming off.

According to the means described in claim 6, according to claim 1,
6. In the flexible printed circuit board terminal according to any one of claims 5 to 5, the portion of the installation surface pressed by the curved beam portion has a curvature substantially equal to the curvature of the outer peripheral surface of the curved beam portion. It is characterized by. Since the portion pressed by the curved beam portion on the installation surface of the terminal has a curvature substantially equal to the curvature of the outer peripheral surface of the curved beam portion, a sufficient contact area between the outer peripheral surface of the curved beam portion and the FPC can be secured. Therefore, stress concentration on the FPC can be favorably alleviated.

According to the means of claim 7, claim 1 is
7. The terminal for a flexible printed circuit board according to any one of claims 6 to 6, wherein a portion of the bent beam portion pressing the flexible printed circuit board has a convex portion toward the outer periphery. Thereby, the flexible printed circuit board can be pressed strongly.

According to the means described in claim 8, according to claim 7,
In the terminal for a flexible printed circuit board described in the above, a flexible printed circuit board having a hole for fitting the convex portion is pressure-fixed to correspond to the convex portion. By fitting the convex portion of the bent beam portion into the hole of the flexible printed board, the FPC can be effectively prevented from coming off.

According to the means of claim 9, according to claim 7,
In the terminal for a flexible printed circuit board described in (1), the installation surface for press-fitting and fixing the protrusion is provided with a hole large enough to fit the protrusion.
In the base, by forming a hole at a position facing the protrusion of the contact member, the contact surface between the terminal and the FPC is sufficiently widened on the periphery of the hole by pressing the protrusion against the FPC. As a result, the reliability of the electrical connection between the terminal and the FPC can be improved.

According to a tenth aspect of the present invention, in the terminal for a flexible printed circuit board according to any one of the first to ninth aspects, which is perpendicular to the base, the base is provided near the bent beam portion. It is characterized in that it has a wall that extends substantially vertically in the longitudinal direction and is formed in the base in a direction that is bent in the vertical direction. Thereby, it is possible to prevent interference between the wiring and the like in the vicinity of the flexible printed circuit board terminal and the bent beam portion.

According to the eleventh aspect of the present invention, in the terminal for a flexible printed circuit board according to the tenth aspect, there is provided a bent beam pressing portion extending from a wall so as to press the bent beam portion. And Thereby, the pressing force of the contact member can be effectively applied to the FPC, so that the reliability of the electrical and mechanical connection between the FPC and the contact member can be further improved.

[0018]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described based on specific embodiments. First Embodiment FIG. 1A is a schematic diagram illustrating a connection state between a terminal 101 and an FPC 2 according to a specific first embodiment of the present invention. FIG. 2 is a schematic diagram showing a cross section taken along the line AA in FIG. The FPC 2 includes a resin film 22 made of PET (polyethylene terephthalate) or PI (polyimide) and a circuit conductor 2 formed thereon.
1 and 1. As a method of forming the FPC 2,
A metal foil such as copper is formed on the resin film 22 and the metal foil is etched into a predetermined shape to form the circuit conductor 2.
1 or a method of forming the circuit conductor 21 by printing a conductor ink on the resin film 22. The FPC 2 is used, for example, to derive a detection signal of a membrane switch for detecting whether or not an occupant is on a seat when the airbag device is activated.

Next, a connection method between the FPC 2 and the terminal 101 will be described. The barrel (bent beam) 11 of the terminal 101 is formed by punching a part of the base 10 and
It is formed by bending in the connection direction with PC2. As shown in FIG. 1B, the barrel (bent beam portion) 11 is a strip formed in the longitudinal direction of the substrate by punching out a contour 11q on the base 10 leaving one side 11p close to the installation surface 10a. The piece 11r is formed by bending to face the installation surface 11a.

Before connecting the FPC 2, the FPC 2 is placed between the barrel 11 of the terminal 101 and the installation surface 10a.
Is provided with sufficient space to mount the. In this state, the circuit conductor 21 of the FPC 2 is placed on the installation surface 10a of the base 10 with the circuit conductor 21 facing upward, and the barrel 11 is caulked in a cylindrical shape. As a result, as shown in FIG.
The FPC 2 is pressed by the outer peripheral surface 11a of the FPC 1. Thereby, it is electrically and mechanically connected to the FPC 2. At this time, at the same time, the contact portion 12a of the base 10 corresponding to the outer peripheral surface 11a of the barrel 11 is extruded upward in a convex shape, and the pressure contact with the outer peripheral surface 11a of the barrel 11 is strengthened. It is desirable that the radius of curvature of the outer peripheral surface 11a of the barrel 11 and the radius of curvature of the contact portion 12a be substantially the same, that is, the same circle. The protrusion 101 including the contact portion 12a has a trapezoidal shape so that the terminal 101 and the contact portion 12a in FIGS. 1A and 2 are formed to be inclined from the horizontal plane.

The convex extruded portion 12 including the contact portion 12a
The top portion 12b may be formed such that the contact portion 12a is inclined from the horizontal plane, and the top portion 12b is desirably on the side farther from the barrel 11 than the contact portion 12a. Further, the projecting extruded portion 12 may be configured so that the contact portion 12a is inclined from the horizontal plane and is substantially perpendicular to the longitudinal direction of the terminal. In this way, the FPC 2 and the terminal 101 are electrically and mechanically connected with high performance.

FP using terminal 1 shown above
By connecting C2, the outer peripheral surface 11a of the barrel 11 is
, The barrel 11 and the FPC 2 come into surface contact with each other, so that stress concentration does not act on the FPC 2 and damage to the FPC 2 can be prevented. Installation surface 1
0a has a curvature substantially equal to the curvature of the outer peripheral surface 11a of the barrel 11, so that the contact area between the barrel 11 and the FPC 2 can be sufficiently increased, and the stress concentration can be reduced. Can be more relaxed. In addition, since the terminal 1 and the FPC 2 are in surface contact, the density of current flowing into the contact surface during energization can be reduced.
A relatively high current of the order of mA can be passed. Further, when the FPC 2 is pressed by the outer peripheral surface 11a of the barrel 11, the pressing force by the barrel 11 acts in a direction substantially orthogonal to the surface of the FPC 2, so that the thickness of the FPC 2 decreases due to a decrease in stress over time and the like. However, the elastic force can be satisfactorily applied to the FPC 2 from the barrel 11. Barrel 1
1 has a low spring constant because it has a bent beam structure,
Since the degree of decrease in elastic force due to the decrease in wall thickness of 2 is low,
The elastic pressure on the FPC 2 is stabilized over time.

Second Embodiment FIG. 3A is a schematic cross-sectional view showing a connection state between a terminal 102 and an FPC 2 according to a specific second embodiment of the present invention. The terminal 102 of this embodiment is the same as that of the first embodiment except that a groove 13 is provided, and is a perspective view similar to FIG. Also,
The FPC 2 of this embodiment is the same as that of the first embodiment.

The terminal 102 shown in FIG.
No. 0 has a groove 13 substantially perpendicular to the longitudinal direction of the terminal at a portion where the FPC 2 is crimped. A cross section taken along line BB of FIG. 3A is shown in FIG. Such a terminal 10
2 with the circuit conductor 21 of the FPC 2 on the upper side
Then, the barrel 11 is placed on the installation surface 10a, and the barrel 11 is caulked in a cylindrical shape. As a result, as shown in FIG.
The FPC 2 is pressed by the outer peripheral surface 11 a of the FPC 2 and partially buried in the groove 13. Thereby, it is electrically and mechanically connected to the FPC 2. At this time, at the same time, the contact portion 12a of the base 10 corresponding to the outer peripheral surface 11a of the barrel 11 is extruded upwardly,
As in the first embodiment, it is desirable to make the pressure contact with the outer peripheral surface 11a of the barrel 11 strong. FIG.
As described above, it is desirable that the outer peripheral surface 11a of the barrel 11 and the groove 13 have the same radius of curvature, that is, the same, and the same circular shape. However, the groove 13 may have a substantially rectangular or substantially inverted triangular cross section. In this way, the FPC 2 and the terminal 102 are electrically and mechanically connected with high performance.

Third Embodiment FIG. 4 is a schematic sectional view showing a connection state between a terminal 103 and an FPC 2 according to a third embodiment of the present invention. The terminal 103 of the present embodiment has a boss (convex portion) that is convex toward the pressing direction at a position where the terminal 103 presses the FPC 2 of the barrel 11.
14 is the same as that of the first embodiment except that
It becomes a perspective view similar to (a). In addition, the FPC of this embodiment
In the structure 2, the FPC 2 is also composed of a boss (convex portion) 14
Is the same as that of the first embodiment except that a latch hole (hole) 23 is provided at a portion corresponding to. The latch hole (hole) 23 is for fitting the boss (convex portion) 14.

The terminal 103 in FIG.
A boss 14 that is convex toward the outer periphery is provided at a position where the FPC 2 is pressed. For such a terminal 103,
The circuit conductor 21 of the FPC 2 having the latch hole 23 is placed on the installation surface 10a of the base 10 with the circuit conductor 21 facing upward, and the barrel 1
1 is crimped into a cylindrical shape. Thereby, the FPC 2 is pressed on the outer peripheral surface 11a of the barrel 11, as shown in FIG.
The boss 14 of the barrel 11 is fitted to the latch hole 23 of the FPC 2 to be electrically and mechanically connected to the FPC 2. At this time, it is preferable that the contact portion 12a of the base 10 corresponding to the outer peripheral surface 11a of the barrel 11 be simultaneously extruded upward to make the pressure contact with the outer peripheral surface 11a of the barrel 11 strong. This is the same as in the first embodiment. In this way, the FPC 2 and the terminal 103 are electrically and mechanically connected with high performance.

Fourth Embodiment FIG. 5 is a schematic sectional view showing a connection state between a terminal 104 and an FPC 2 according to a specific fourth embodiment of the present invention. The terminal 104 of the present embodiment has a boss (convex portion) that is convex toward the pressing direction at a portion where the terminal 103 presses the FPC 2 of the barrel 11.
14 except that the base 10 has a contact hole (hole) 15 at a position corresponding to the boss (convex portion) 14 of the base 10.
This is the same as the embodiment, and is a perspective view similar to FIG. The contact hole (hole) 15 is the boss (convex portion) 1
4 is a hole large enough to fit. Further, the structure of the FPC 2 of this embodiment is the same as that of the first embodiment.

The terminal 104 in FIG.
The base 10 has a boss 14 protruding toward the outer periphery at a position where the FPC 2 is pressed, and a contact hole 15 at a position corresponding to the boss 14 of the base 10. Terminal 1 like this
04 is placed on the installation surface 10a of the base 10 with the circuit conductor 21 of the FPC 2 facing upward, and the barrel 11 is caulked in a cylindrical shape. As a result, as shown in FIG.
The FPC 2 is pressed by the outer peripheral surface 11 a of the base 1, and the boss 14 of the barrel 11 is
Press 2. As a result, terminal 104 and FPC2
The contact surface between the terminal 104 and the FPC 2 can be made sufficiently wide on the peripheral edge of the contact hole 15 to improve the reliability of the electrical connection between the terminal 104 and the FPC 2. At this time, at the same time, the contact portion 1 of the base 10 corresponding to the outer peripheral surface 11a of the barrel 11
2a is extruded upward to form an outer peripheral surface 11a of the barrel 11.
It is the same as in the first embodiment that it is desirable to make the pressure contact with the substrate firm. In this way, the FPC 2 and the terminal 104 are electrically and mechanically connected with high performance.

Fifth Embodiment FIG. 6 is a schematic sectional view showing a connection state between a terminal 105 and an FPC 2 according to a specific fifth embodiment of the present invention. In the terminal 105 of this embodiment, two walls (walls) 16 facing each other so as to sandwich the barrel 11 are provided upright. The two walls (walls) 16 extend substantially perpendicularly to the longitudinal direction of the base 10 and are formed by bending the base 10 vertically. 2
The barrel 11 and the FPC 2 are formed by a single wall (wall) 16.
It is possible to prevent external wiring and the like from interfering with the vicinity of the contact surface with the external wiring.

Sixth Embodiment FIG. 7 is a schematic diagram showing a connection state between a terminal 106 and an FPC 2 according to a specific sixth embodiment of the present invention. FIG. 8 is a schematic view showing an AA cross section in FIG. F of this embodiment
The structure of the PC 2 is the same as that of the first embodiment. A clip (bent beam portion) 17 of the terminal 106 is formed by punching a part of the base 10 and bending it in the direction of connection with the FPC 2. As shown in FIG. 1B, the clip (bent beam portion) 17 has a contour 11q on the base 10, leaving a side 11p close to the installation surface 10a, as in the barrel 11 of the terminal 101 according to the first embodiment. The strip 11r formed in the longitudinal direction of the substrate by punching is bent and formed to face the installation surface 11a.

The terminal 106 shown in FIG.
Thus, the FPC 2 is sandwiched between the base 10 and the clip 17, and the clip 17 is further pressed by a spring (bending beam pressing portion) 18. The spring 18 vertically stands on the base 10 at a portion extending substantially perpendicular to the longitudinal direction of the base 10, holds the FPC 2 by the clip 17, bends the upper part in the horizontal direction, and presses the clip 17. It is like that. As a result, the contact between the terminal 106 and the FPC 2 is held by the double spring structure of the clip 17 and the spring 18, and the terminal 106 and the FP
The contact surface with C2 can be made wider. In this way, the FPC 2 and the terminal 106 are electrically and mechanically connected with high performance. Since the spring 18 extends from the wall 16, the same as in the fifth embodiment,
It is possible to prevent external wiring and the like from interfering near the contact surface with the FPC 2.

At the terminal 106, the clip 17
It is also useful to make the contact surface 17a with the FPC 2 or the contact portion 12a of the base 10 corrugated in a direction substantially perpendicular to the longitudinal direction of the terminal, so that the FPC 2 is hard to come off. In addition, the extruding portion 1 of the terminal 101 of the first embodiment
It is also effective to provide the groove 13 of the second or second embodiment in the terminal 106 of the sixth embodiment. Further, it is also effective to apply the same processing as the boss 14 or the contact hole 15 which is a feature of the terminal 104 of the fourth embodiment to the terminal 106 of the sixth embodiment.

Further, the terminal 1 of the first to fourth embodiments
01 to 104, the terminal 10 of the sixth embodiment
The terminal 101 may have a structure in which the spring 18 is provided, which is one of the features of the sixth embodiment, and may be held by a double spring structure.
To 104, the pressure bonding of the FPC 2 by the barrel 11 can be further improved.

<< Application Examples >> FIGS. 9A and 9B show a state in which a plurality of terminals 100 for a flexible printed circuit board according to the present invention, as exemplified in the first to fifth embodiments, are simultaneously connected. FIG. Now, FIG.
It is assumed that three terminals are connected to a flexible printed circuit board 200 having three lines as shown in FIG. In accordance with the distance between the three circuit conductors 21 forming each line, three flexible printed circuit board terminals 100 according to the present invention connected by a carrier 109 are prepared. This is connected to three circuit conductors 21 at three places at a time with an appropriate jig, and then, as shown in FIG.
By removing 9, three flexible printed circuit board terminals 100 connected independently to the three circuit conductors 21 can be obtained. In this step, the advantages of the present invention over the conventional example are shown in FIGS.
As is clear from FIG. 7, the pretreatment of the flexible printed circuit board having a plurality of lines is unnecessary, and the connecting end 24 does not need to be formed in a tongue for each circuit conductor 21. As described above, it is extremely easy to connect a plurality of terminals for a flexible printed circuit board according to the present invention at the same time.

In the above embodiment, the FPC 2 is mounted on the installation surface 10a with the circuit conductor 21 facing upward.
Even when the circuit conductor 21 is placed on the lower side, the electrical connection between the FPC 2 and the terminal 1 is possible. In the above embodiment, the male terminal 19 is provided. However, the terminal may have any shape corresponding to the external connector to be connected. Also, terminal 19
The electrical connection may be obtained by crimping an external conductor.

As indicated above, according to the present invention,
By pressing the FPC on the outer peripheral surface of the cylindrical curved beam portion, the curved beam portion and the FPC come into surface contact, so that stress concentration on the FPC can be reduced and damage to the FPC can be prevented. And the terminal for a flexible printed board of the present invention is:
It is not necessary to process the end to which the FPC is connected into a tongue shape, and the terminal has good productivity in the connection process.

[Brief description of the drawings]

FIG. 1A is a schematic diagram showing a connection state between a turner mill and an FPC according to a specific first embodiment of the present invention,
(B) is the schematic diagram which showed the strip piece which punched out the base which becomes a bending beam part.

FIG. 2 is a schematic cross-sectional view showing a connection state between a turner mill and an FPC according to a first specific example of the present invention.

FIG. 3A is a schematic cross-sectional view showing a connection state between a turner mill and an FPC according to a second specific example of the present invention,
(B) The cross-sectional schematic diagram of the contact part from another angle.

FIG. 4 is a schematic sectional view showing a connection state between a turner mill and an FPC according to a third specific example of the present invention.

FIG. 5 is a schematic sectional view showing a connection state between a turner mill and an FPC according to a fourth specific example of the present invention.

FIG. 6 is a schematic view showing a connection state between a turner mill and an FPC according to a fifth specific example of the present invention.

FIG. 7 is a schematic diagram showing a connection state between a turner mill and an FPC according to a specific sixth embodiment of the present invention.

FIG. 8 is a schematic cross-sectional view showing a connection state between a turner mill and an FPC according to a sixth specific example of the present invention.

FIG. 9 shows a plurality of turner mills and F according to an application example of the present invention.
FIG. 4 is a schematic view showing a connection process with a PC.

10A and 10B are a schematic perspective view and a schematic sectional view, respectively, showing a conventional structure in which a tongue-shaped FPC is fixed with a barrel extending substantially perpendicularly to the longitudinal direction of the terminal.

[Explanation of symbols]

100, 101, 102, 103, 104, 105, 1
06 Terminal 2 Flexible printed circuit board (FPC) 10 Base 10a Installation surface 109 Carrier 11 Barrel 11a Barrel outer peripheral surface 12 Extruded portion 13 Groove 14 Boss 15 Contact hole 16 Wall 17 Clip 18 Spring 19 Terminal 21 Circuit conductor 22 Resin film 23 Latch hole 24 ends

Claims (11)

[Claims] 1. A base having an installation surface on which a flexible printed circuit board is mounted, and wherein the base is formed in a longitudinal direction of the substrate by punching an outline except one side close to the installation surface. A flexible print, comprising: a bent beam portion formed by bending a strip opposing the installation surface, wherein the flexible printed circuit board is fixed by crimping between the surface of the bent beam portion and the installation surface. Terminal for substrate. 2. The bending beam portion, wherein the strip pieces are formed in a cylindrical shape inside facing the installation surface, and the flexible printed circuit board is fixed by pressure bonding between an outer peripheral surface of the bending beam portion and the installation surface. The terminal for a flexible printed circuit board according to claim 1, wherein: 3. The flexible printed circuit board terminal according to claim 1, wherein the bent beam portion is turned to the installation surface side such that the strip piece has a surface facing the installation surface. . 4. The flexible printed circuit board according to claim 2, wherein the installation surface has a convex shape in a longitudinal direction at a position corresponding to the curved beam portion on the installation surface. Terminal. 5. The groove according to claim 2, wherein a groove is provided at a position corresponding to the bent beam portion on the installation surface in a direction substantially perpendicular to a longitudinal direction on the installation surface. A terminal for a flexible printed circuit board as described in the above. 6. A part of the installation surface pressed by the curved beam portion has a curvature substantially equal to a curvature of a contact surface of the curved beam portion. 2. The terminal for a flexible printed circuit board according to claim 1. 7. The flexible device according to claim 1, wherein the bending beam portion has a convex portion in a portion pressing the flexible printed circuit board in a pressing direction. Terminal for printed circuit boards. 8. The flexible printed circuit board terminal according to claim 7, wherein the flexible printed circuit board having a hole for fitting the convex portion is pressure-fixed corresponding to the convex portion. 9. The flexible printed circuit board according to claim 7, wherein the installation surface to be fixed by crimping corresponding to the projection has a hole large enough to fit the projection. Terminal. 10. A wall near the bent beam portion, the wall extending in a direction substantially perpendicular to the longitudinal direction of the base, and formed to be bent perpendicular to the base. 10. The terminal for a flexible printed circuit board according to any one of 9. 11. The flexible printed circuit board terminal according to claim 10, further comprising a bent beam holding portion extending from the wall to hold the bent beam portion.