JP2000243492A - Circuit board and mounting connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an FPC from being detached accidentally by providing a local stress generating portion for generating a local stress on the end to be mounted on a mounting connector. SOLUTION: The front end rim of the near area of a notch 21 to be a local stress generating portion 19 is pressed upward by respective bevels of a plurality of pressing part and bent forcefully and locally to have a camber. The reaction force of this camber force is a part of or the entire crimping force of a first crimping portion 7 and a slider 11 and is also a part of cramping force when the slider 11 and a circuit board (FPC) 12 are cramped between the first crimping portion 7 and a second crimping portion 8. The flexibility of the FPC 12 is created as a local stress and the holding force of a connector to the FPC 12 is stabilized. This holding force is stable regardless of large or small. Specifically, a projection 18 has a locking effect and can enhance the stability.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit board and a mounting connector, and more particularly to a circuit board and a mounting connector for mounting a flexible circuit board on another circuit board via a connector.

[0002]

2. Description of the Related Art A circuit board is surface-mounted on another circuit device. As the circuit board, a flexible circuit board (Fl
An exible printed circuit (hereinafter, referred to as FPC) is known. Other circuit devices may also be circuit boards. 2. Description of the Related Art Devices are known in which a circuit board is connected to another circuit board via a connector and mounted. As such a device, as a signal transmission method for transmitting an electric signal between the FPC and another circuit board, the FPC having a degree of freedom to bend to some extent is applied to a FPC with a connector. Various types of connectors for mounting a flexible circuit board, which are connected to each other and locked, are known.

As such a connector, Japanese Unexamined Patent Publication No. 9-2
A connector for mounting a circuit board as shown in JP-A-83236 is known. This known connector comprises a main body, a spring that is bent and mounted in the main body, and a slider (retainer) that is removably inserted into the main body, and connects the end of the circuit board to the main body and the spring. The spring is provided with a sufficient holding force by inserting the slider into the gap and press-fitting the slider, thereby holding the circuit board on the main body.

[0004] Even if the holding force between the two objects is designed to be large enough, if the engagement relationship between the two objects is lost due to some trigger, the strong holding force will instead become stronger. The force is changed to a force for positively canceling the engagement. As described above, there has been a problem that the lock between the FPC and the connector for the FPC cannot be successfully performed, and the FPC is canceled.

[0005] It is desired that the FPC does not come off the connector for the FPC. In particular, it is preferable that a sufficient holding force that does not come off is provided between the FPC and the FPC connector. It is particularly desirable that the sufficient holding force does not lead to the release of the holding. This is particularly desirable where the circuit board being held is flexible.

[0006]

An object of the present invention is to provide an FP
C is to provide a circuit board and a mounting connector which are not detached from the circuit board by any chance. Another object of the present invention is to provide F
It is an object of the present invention to provide a circuit board and a mounting connector in which a retaining force that does not separate from the PC is applied to the FPC. Still another object of the present invention is to provide a holding force to the FPC that does not deviate from the FPC, the holding force does not cause the cancellation of the holding, the interaction force between the connector and the FPC is harmonized, and An object of the present invention is to provide a low-cost circuit board and a mounting connector.

[0007]

Means for solving the problem are described as follows. The technical matters corresponding to the claims in the expression are appended with numbers, symbols, etc. in parentheses (). The number, the symbol, etc. are at least one of the technical matters corresponding to the claims and the plurality of embodiments.
Although the agreement / correspondence with the technical matters of the two forms is clarified, it is not intended to show that the technical matters corresponding to the claims are limited to the technical matters of the embodiment.

The circuit board according to the present invention is provided with a local stress generating portion (19) for generating a local stress at an end mounted on the mounting connector (1). The mounted circuit board has a local stress generating portion (1).
It is stably held on the mounting connector (1) via the stress of 9). It is preferable in terms of cost that the local stress generating portion is formed as a notch (21). There are a plurality of notches (21), and the plurality of notches (21) are provided at a plurality of positions, and the plurality of notches (21) are formed by connecting the end of the circuit board (12) to the mounting connector (1). It is particularly preferred that they are arranged approximately symmetrically with respect to the centerline of the end of the end which faces in the direction of movement when mounted.

A mounting connector according to the present invention is a mounting connector for mounting such a circuit board, and includes a main body (2) and a slider (11) inserted into the main body (2).
And an elastic element (5) having a lead portion (9) and fixed to the main body (2). The elastic element (5) guides sliding of the slider (11), and A first crimping portion (7) for crimping on the slider (11) and a second crimping portion (8) for crimping on one side (13) of the above-mentioned end of the circuit board (12), the end of which is provided. The part is the slider (11) and the second crimping part (8)
The other surface (14) of the end slides with respect to the slider (11), and the elastic element (5) further presses the local stress generating portion (19) to remove it. Is provided with a pressing portion (16) for deforming.

The circuit board (12) to be mounted is stably held by the mounting connector (1) via the stress of the local stress generating portion (19) and inserted into the connector (1). The local stress generating portion (1) of the circuit board (12)
9) is deformed by the pressing portion (16) to generate the stress.

The first crimping portion (7) has a crimping surface on which the slider (11) is crimped, and the second crimping portion (8) has one surface (13) of the above-mentioned end of the circuit board (12). ) Is preferably provided with a projection portion (18) which is pressed in a point-like manner for generating stress and stabilizing the stress, and the structure is simple. The pressing portion (16) has a slope (16a) for pressing the local stress generating portion (19), thereby simplifying its shape.

The local stress generating portion (19) is formed as a notch (21), and the slope (16a) generates the stress by locally bending the above-mentioned end near the notch (21). Can be done. There are a plurality of notches (21), and a plurality of notches (21) are provided at a plurality of locations,
The plurality of notches (21) are arranged at substantially symmetrical positions with respect to the center line (22) of the end of the end, which is oriented in the direction of movement when the end is mounted on the connector (1), The pressing portions (16) are arranged at a plurality of positions as a plurality of pressing portions (16), and the plurality of pressing portions (16) are arranged in a plurality of notches corresponding to the positions (21).

In the case where a circuit board called a flexible circuit board is used as the circuit board, the above-described stress works particularly effectively. In a mounting method in which such a flexible circuit board is mounted on another circuit board via a connector (also called a socket) and an electric signal is propagated between the two circuit boards, local stress generation of the FPC body occurs. By providing the portion, the FPC holding force of the connector can be increased, the detachment / disconnection of the FPC from the connector can be reduced, and the propagation of the electric signal can be stabilized.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Corresponding to the drawings, an embodiment of a mounting connector according to the present invention is provided with a connector. The connector 1 is, as shown in FIG.
It has. As shown in FIG. 2, the main body 2 is formed from a ceiling wall 3, a floor wall 4, and side walls (not numbered). The ceiling wall 3, the floor wall 4, and the side wall are integrally formed of resin. The floor wall 4 is formed in a comb shape, and the floor wall 4 is formed with through grooves into which the leads sink, corresponding to positions of a plurality of leads to be described later.

An elastic element 5 is fixed to the main body 2. The elastic element 5 is joined to the back surface (inner surface) of the ceiling wall of the main body 2 by an appropriate joining means such as an appropriate adhesive. The elastic element 5 can also be joined to the side wall of the main body 2. As shown in FIG. 3, the elastic element 5 includes a base 6, a first crimping portion 7, a second crimping portion 8, and a lead portion 9.

Base 6, first crimping portion 7, and second crimping portion 8
In the case where the metal lead portion 9 is integrally formed by resin molding, the metal lead portion 9 can be embedded and integrated into the resin body by insert injection molding. The second crimping portion 8
It can be a lead part. Furthermore, the base portion 6, the first crimping portion 7, the second crimping portion 8, and the lead portion 9
All of these can be integrally formed of metal. In this case, a plurality of metal bodies corresponding to the number of leads are used.

The second crimping portions 8 are respectively formed as a plurality of elements corresponding to the number of leads, and are respectively connected to the base 6. The number of lead portions 9 that are leads is the number of leads. The first crimping portion 7 can be formed as a single plate. The plurality of / second crimping portions 8 extend inwardly in a direction substantially perpendicular to the inner surface of the base 6.

Between the first crimping portion 7 and the second crimping portion 8, the slider 11 and the flexible circuit board (hereinafter, referred to as "the flexible circuit board") are provided.
FPC) 12 is inserted. The slider 11 is mounted between the first crimping portion 7 and the FPC 12. FPC
12 is mounted between the second crimping portion 8 and the slider 11. The first crimping portion 7 guides the sliding of the slider 11 and presses against the slider 11.

As shown in FIG. 5, the second crimping portion 8 is crimped to one surface 13 of the end 12a of the FPC 12. The end 12a is sandwiched between the slider 11 and the second crimping portion 8. The other surface 14 of the end 12a slides on the slider 11 as shown in FIG. 2 and is pressed against the lower surface 15 of the slider 11 as shown in FIG.

The elastic element 5 is, as shown in FIGS.
A plurality of pressing portions 16 are provided for pressing and deforming a local stress generating portion described later. Multiple / Pressing part 1
6 are integrally formed as a part of the elastic element 5 at two places. As shown in FIG. 6, the plural / pressing portions 16
The PC 12 has a slope 16a that is inclined with respect to the direction in which the PC 12 moves. The slope 16a faces the front end of the FPC 12.

As shown in FIG. 3, the first crimping portion 7 has a crimping surface 17 on which the slider 11 is crimped. As shown in FIG. 4, at the time of mounting and assembling, the moving element 11 is flatly crimped to the crimping face 17. At the time of such pressure bonding, as shown in FIG. 7, the second pressure bonding portion 8 is pressure-bonded to the one surface 13 of the FPC 12 by point contact via the projection 18 shown in FIG.

FIG. 8 shows a local stress generating portion 19 provided in an end region of the FPC 12. A notch 21 is formed to generate a local stress in the local stress generating portion 19. The notches 21 are provided at a plurality of locations, particularly at two locations. The two locations are oriented in a direction orthogonal to the direction in which the FPC 12 moves, and are symmetrically disposed with respect to the center line 22 of the FPC 12.

The shape of the notch 21 is free. FIG.
The notch 21 shown in FIG. 9 is a rectangular hole opened at both ends of the FPC 12, the notch 21 shown in FIG. 9 is a sharp hole inside, and the notch 21 shown in FIG.
Is a rounded hole inside, and the notch 21 shown in FIG. 11 is a hole that is not opened at both ends of the FPC 12. One of the plurality / notches 21 shown in FIG. 11 overlaps the above-described center line.

As shown in FIG. 7, the front edge of the local stress generating portion 19 in the vicinity of the local stress generating hole 21 is formed by the slopes 16a of the plurality of pressing portions 16 at the time of mounting and assembling. It is pushed up and is forcibly locally bent and warped. The reaction force of the warping force is all or a part of the crimping force of the first crimping portion 7 and the slider 11, and the slider 11 and the FPC 12 form the first crimping portion 7.
It is also a part of the clamping force when sandwiched between the second crimping portion 8 and the second crimping portion 8. The flexibility of the FPC 12 is generated as local stress, and stabilizes the holding force between the connector 1 and the FPC 12. This holding force is stable regardless of its magnitude. In this case, in particular, the projection 18 has a locking action, and its stability can be enhanced.

The connector 1 is of a surface mounting type, and is mounted on another circuit board. Thus, FPC1
2 is mounted on another circuit board via the connector 1, and the lead portion 9 is electrically connected to the other circuit board by soldering or the like. The protrusion 18 can also serve as a terminal for connecting the lead portion 9 and an electrical connection terminal of the FPC 12.

[0026]

According to the circuit board and the mounting connector of the present invention, the local stress generating portion of the flexible FPC interacts with the connector body to increase the holding force of the FPC and to stabilize the holding force. In addition, more reliable and highly reliable FPC mounting connection can be realized.

[Brief description of the drawings]

FIG. 1 is a plan view showing an embodiment of a mounting connector according to the present invention.

FIG. 2 is a sectional view taken along line II-II of FIG. 1 before mounting.

FIG. 3 is a sectional view showing an elastic element.

FIG. 4 is a sectional view taken along line II-II of FIG. 1 after mounting.

FIG. 5 is a sectional view taken along line VV of FIG. 1 before mounting.

FIG. 6 is a cross-sectional view showing the elastic element in a cross section at another position.

FIG. 7 is a sectional view taken along line VV of FIG. 1 after mounting.

FIG. 8 is a plan view showing an embodiment of a circuit board.

FIG. 9 is a plan view showing another embodiment of the circuit board.

FIG. 10 is a plan view showing still another embodiment of the circuit board.

FIG. 11 is a plan view showing still another embodiment of the circuit board.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... (mounting) connector 2 ... Main body 5 ... Elastic element 7 ... 1st crimping part 8 ... 2nd crimping part 9 ... Lead part 11 ... Slider 12 ... Circuit board 13 ... One surface 14 ... Other surface 16 ... Pressing part 16a ... Slope surface 17 ... Crimping surface 18 ... Protrusion 19 ... Local stress generating part 21 ... Notch 22 ... Center line

Claims (8)

[Claims] A circuit board having a local stress generating portion for generating a local stress at an end mounted on a mounting connector. 2. The circuit board according to claim 1, wherein the local stress generating portion is formed as a notch. 3. The plurality of notches according to claim 2, wherein the plurality of notches are provided at a plurality of positions, and the plurality of notches are provided when the ends are attached to the mounting connector. A circuit board, wherein the circuit board is disposed substantially symmetrically with respect to a center line of an end of the circuit board which faces in a moving direction. 4. A mounting connector for mounting the circuit board according to claim 1, wherein: a main body; a slider inserted into the main body; and an elastic element having a lead portion and fixed to the main body. A first crimping portion that guides the sliding of the slider and crimps the slider, and a second crimping portion that crimps one side of the end of the circuit board. The end portion is sandwiched between the slider and the second crimping portion, the other surface of the end portion slides on the slider, and the elastic element further comprises: A mounting connector comprising a pressing portion for pressing the local stress generating portion to deform it. 5. The circuit according to claim 4, wherein the first crimping portion has a crimping surface on which the slider is crimped, and the second crimping portion is point-wise crimped to the one surface of the end of the circuit board. A mounting connector characterized in that it has a protruding portion. 6. The mounting connector according to claim 5, wherein the pressing portion has a slope for pressing the local stress generating portion. 7. The mounting connector according to claim 6, wherein the local stress generating portion is formed as a notch, and the inclined surface locally bends the end portion near the notch. 8. The plurality of notches according to claim 7, wherein the plurality of notches are provided at a plurality of positions, and the plurality of notches are provided when the ends are mounted on the mounting connector. The pressing portion is disposed at a plurality of positions as a plurality of pressing portions, and the plurality of pressing portions are disposed at a plurality of positions as a plurality of pressing portions. A mounting connector characterized by being arranged corresponding to a position of a notch.