JP2000048885A - Connector for flexible base plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector for a flexible base plate, having good operability and high reliability, and capable of withstanding repeated mounting. SOLUTION: A lever 320 is provided with a protrusion (A) 322 for pressing a flexible base plate 325 against the contact part of a contact 310 on the same straight line as the rotational center after the rotation of the lever, and a protrusion (B) to be brought into contact with a base table part (B) 304 provided on a housing 302 so as to climb over it during the rotation of the lever. No lock is necessary for the lever to be rotated in mounting of the flexible base plate, so that damages to the flexible base plate by pressing force can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector for a flexible board, and more particularly to a small connector for a flexible board which has good workability and high reliability when mounted on a printed circuit board or the like.

[0002]

2. Description of the Related Art Conventionally, a flexible board connector to be mounted on a printed circuit board or the like has been required to have high density mounting, downsizing, high workability, and high reliability. Examples of connectors for boards or flat cables are disclosed in JP-A-9-82427 and JP-A-6-77186.

FIG. 8 shows a connector described in Japanese Patent Application Laid-Open No. 9-82427, and FIGS. 8A to 8C show a process of attaching a flat cable. As shown in this figure, the connector 101 includes a housing 102 having an open top, and a contact portion 106a that extends from the front to the rear of the housing 102 and is electrically connected to a flat cable (not shown) at the tip. Provided contact portion 104a
And a plurality of contacts 103a having a lead terminal piece 105a and attached to the housing 102 from the front side, and a contact portion 106b extending forward from the rear of the housing 102 and electrically connected to a flat cable at the tip thereof.
A plurality of contacts 103b having a contact piece 104b provided with a lead terminal piece 105b and attached to the housing 102 from the rear side, and are rotatably supported above the housing 102, and are provided at a predetermined rotation position.
Lever 10 for pressing and fixing the flat cable against
8 is comprised. A line connecting the rotation center 107 of the lever 108, the contact portion 106a of the contact 103a, and the contact portion 106b of the contact 103b forms an isosceles triangle.

FIG. 9 shows a connector described in Japanese Utility Model Laid-Open No. Hei 6-77186. As shown in this figure,
The connector 201 includes a housing 202 having an open top.
A pressing member 210 for pressing and fixing the flexible substrate 209 inserted into the housing 202;
A U-shaped connecting portion 205 for connecting to the rotation supporting portion 204 and the flexible substrate 209 of the tenth portion and a contact 203 in which a lead terminal portion 206 for electrical connection to the outside is integrated with an arm portion 207. The contact 203 is attached from the rear of the housing 202, and the pressing member 210 is attached so as to rotate around the tip of the rotation support 204. The pressing protrusion 211 on the pressing member 210 is
Is located outside the line connecting the center of the tip of the rotation support portion 204 and the contact portion 208 of the contact 203 when the pressing member 210 is rotated to a predetermined position. It is set to be located in.

[0005]

FIG. 10 is a schematic diagram of Japanese Unexamined Patent Publication No.
This figure shows the operation force of the lever 108 when the flat cable of the connector described in Japanese Patent No. 82427 is mounted. The following can be said similarly in the connector described in Japanese Utility Model Application Laid-Open No. 6-77186.

In both of the above-mentioned conventional examples, the operating force of the lever 108 when the flat cable is mounted or the operating force of the pressing member 210 for mounting the flexible substrate 209 is as shown in the graph of FIG. Function is occurring. And the vertical axis of this graph is the lever 108
Can be regarded as a force for pressing the flat cable or a force for pressing the flexible substrate 209 by the pressing member 210, that is, a contact force, and it can be considered that the self-locking function is obtained by using the contact force.

The problem with these two conventional examples is that the contact force, which is the most important in securing and maintaining the characteristics as a connector and which should be set as high as possible, cannot be set when the operation of the lever 108 or the operation of the pressing member 210 is completed. Is a point.

[0008] The reason is that the contact force can be obtained from the lever 1
08 or the force at the end of the operation of the pressurizing member 210 and a force for obtaining a higher self-locking function. The two conventional examples have a structure in which the flat cable or the flexible substrate 209 is sandwiched by a contact force. The highest force during operation is a flat cable or flexible board 209
Assuming that the maximum allowable force of the flat cable or the flexible board 209 is the force for obtaining the self-locking function, that is, the highest force generated during the operation, the operation of the lever 108 or the end of the pressing unit 210 This is because the force becomes smaller.

[0009]

In order to achieve the above object, a connector for a flexible board according to the present invention has a housing in which the insertion direction of the flexible board is the front-rear direction, an opening at the top, and a rear side of the housing. A plurality of contacts extending forward and having a contact piece provided with a contact portion electrically connected to the flexible substrate at a tip thereof, and a plurality of contacts attached to the housing from the rear side having a contact piece and a lead terminal piece; And a lever that presses and fixes the flexible substrate against the housing at a predetermined rotational position, and a connector mounted with the flexible substrate when viewed from the side. The contact point of the contact, the center of rotation of the lever, and the protrusion (A) that the lever presses the flexible substrate against the contact point are the same. In the process of mounting the flexible printed circuit board on the line, in the cross section between the plurality of contacts or at both ends of the contact group, before the rotation of the lever, the protrusion (B) of the lever is located outside the straight line, and the rotation starts. And contacting the surface provided on the housing so as to get over the straight line before and after crossing the straight line, and positioned inside the straight line after the rotation is completed. Further, the lever has a protrusion (A) for pressing the flexible substrate against the contact,
A projection (B) is provided which comes into contact with the surface provided on the housing in the process of turning the lever.

Further, in the connector for a flexible board of the present invention, the insertion direction of the flexible board is the front-rear direction, and the housing is open at the top, and extends from the rear to the front of the housing. A plurality of contacts, each having a contact fixing piece provided with a contact portion to be electrically connected, a lead terminal piece, and an elastic support piece, attached to the housing from the rear side, and rotatably supported above the housing; And a lever for pressing and fixing the flexible board to the housing at a predetermined rotation position, wherein the contact has two contact portions electrically connected to the flexible board. . It is preferable that the center of rotation of the lever for pressing and fixing the flexible substrate and the two contact portions are arranged in a positional relationship of an isosceles triangle.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS. FIG. 1 is a diagram showing the overall configuration of the connector for a flexible board according to the present embodiment. A connector 301 is composed of a housing 302, a contact 310, and a lever 320. 2 is a view showing a state in which the contact 310 is assembled, FIGS. 3 and 4 are side sectional views showing a process of pressing and fixing the flexible board 325 to the connector 301, and FIG. 5 shows a pad section 326 of the flexible board 325. FIG. 6
Is a graph of the operating force of the lever 320 in the process of pressing and fixing the flexible substrate 325 to the connector 301.

As shown in FIG. 1, a housing 302 includes a base portion (A) 303 and base portions (B) provided on both sides thereof.
It is composed of 304 and a side wall 305, and has an open upper side. The base (A) 303 has a large number of slits 306 cut from the rear.

As shown in FIG. 1 and FIG.
The contact 310 is inserted into the slit portion 306 of No. 02 from the rear side of the housing 302. As shown in FIG. 2, the contact 310 includes a contact piece 311 and a fixed piece 31.
2 and a lead piece 313, an elastic support piece 314 is provided above the contact piece 311. As shown in FIG.
11 and the fixing piece 312 sandwich the projection 308 of the housing 302 from above and below. Further, the tip of the elastic support piece 314 has a smooth curved surface, and this portion rotatably supports a lever 320 described later. In addition, a contact portion 315 for making electrical contact with the pad portion 326 of the flexible substrate 325 shown in FIG.

As shown in FIGS. 1 and 4A, the lever 320 has a bearing 307 above the housing 302.
And the flexible substrate 325 is rotatably supported by the elastic support piece 314 of the contact 310 and the housing 3
After the flexible substrate 325 is set at a predetermined position on the contact 02 and rotated, the flexible substrate 325 is pressed and fixed to the contact portion 315 of the contact 310 and serves as a lid of the housing 302 that covers the flexible substrate 325. As shown in FIGS. 4A to 4C, a curved locking portion 321 is provided on the rotation center side of the lever 320, and the locking portion 321 and the tip of the elastic support piece 314 of the contact 310 are fitted. As a result, the lever 320 is
14 is rotatably supported around the tip.

[0015] On the other hand, as shown in FIG.
There are provided a number of pad portions 326 for making electrical contact.

Next, referring to FIG. 3 and FIG.
The process of pressing and fixing the flexible substrate 325 to 1 will be described in order. FIG. 3 is a cross section of both ends of the contact 310 group. First, as shown in FIG. 3A, the flexible substrate 325 is inserted with the lever 320 opened. Thereafter, as shown in FIG. 3B, the rotation of the lever 320 starts, and the projection (B) 323 contacts the base (B) 304,
After the elastic support piece 314 is bent upward and its amount reaches a peak, the bending of the elastic support piece 314 is restored, and the state shown in FIG. 3C is reached, and the mounting is completed. Figure 4 shows contact 3
10 is a cross section of FIG. First, as shown in FIG. 4A, the flexible substrate 325 is inserted with the lever 320 opened. Thereafter, as shown in FIG.
Rotation starts, the protrusion (A) 322 and the protrusion (B) 32
The elastic support piece 314 is bent upward without contacting the flexible substrate 325 from the positional relationship of FIG.
The state shown in (C) is reached and the mounting is completed.

A flexible board 325 is connected to the connector 301.
The operating force of the lever 320 in the process of pressing and fixing will be described with reference to FIGS. First, in the cross section at both ends of the group of contacts 310 shown in FIG.
0 rotation starts and the projection (B) 323 is 3 on the base (B).
When the lever (B) 323 reaches a point on the straight line connecting the center of rotation of the lever and the contact portion 315 of the contact 310, the lever operation force starts to be generated from the point of contact with the lever 04 and further starts to rise with the rotation of the lever 320. Begins to descend,
On the way, the rotation of the lever 320, that is, the mounting of the flexible substrate 325 is completed. On the other hand, in the cross section of the contact 310 shown in FIG. 4, the projection (A) 322 approaches the flexible substrate 325 with the rotation of the lever 320, but proceeds without contact due to the positional relationship with the projection (B) 323. A straight line connecting the rotation center of the lever and the contact portion 315 of the contact 310 in FIG.
Immediately before the rotation of the lever 320 ends, the protrusion (A) 322 starts to contact the flexible substrate 325,
Then, the rotation of the lever 320, that is, the mounting of the flexible substrate 325 is completed. Therefore, it can be considered that the lever operation force as the connector is a combination of the lever operation forces focused on in FIGS. 3 and 4, and is a characteristic line having a self-locking effect.

As an application of the embodiment, a base portion (B) provided on both sides of the contact group is provided between a plurality of contacts, and the projections (A) and (B) of the lever are connected to the base portion (B). It goes without saying that the same effect can be obtained even if it is provided at a position corresponding to ()).

Next, a second embodiment of the present invention will be described with reference to FIG. FIGS. 7A to 7C show the second embodiment of the present invention.
It is a sectional side view of the contact part in the process of pressing and fixing the flexible substrate 425 to the connector 401 of the connector for flexible substrates of the embodiment. As shown in FIG. 7A, the connector 401 has a plurality of contacts 410 inserted from the rear of the housing 402 and
No. 0 has a contact fixing piece 411, a lead terminal piece 412, and an elastic support piece 414 above the contact fixing piece 411. Further, the contact fixing piece 411 is provided with a contact portion (A) 415a and a contact portion (B) 415b. Have been. It is preferable that the center of the rotating shaft 416 at the tip of the elastic support piece 414, the contact point (A) 415a, and the contact point B 415b are provided in a positional relationship forming an isosceles triangle.

The lever 417 is rotatably supported on the rotation shaft 416 of the elastic support piece 414 above the housing 402. After rotation of the lever 417, the flexible board 425 is connected to the contact portions (A) 415a and the contact portions (B). It has a flat portion 418 and a protrusion 419 pressed against 415b. The flexible substrate 425 is inserted into the connector 401 with the lever 417 opened, and is an initial stage of the process of pressing and fixing. Next, as shown in FIG.
Numeral 7 rotates while bending the elastic support piece 414 upward, and the protrusion 419 becomes the contact portion (A) 415 a and the contact portion (B) 41.
After overcoming 5b, the bending of the elastic support piece 414 recovers slightly, and the state shown in FIG. 7C is reached, and a series of operations is completed. In addition, although the outer side sectional view of the contact group showing the process of pressing and fixing the flexible substrate to the connector is not shown in the second embodiment, these are shown in FIG. 3 shown in the first embodiment. Since they are the same as the side sectional views of (A) to (C), illustration and description are omitted.

[0021]

As described in detail above, a contact force is obtained by bending the elastic support piece of the contact which is the center of rotation of the lever when the flexible substrate is mounted, and the lever has a protrusion (A). ) And the projection (B) are shifted from each other in the rotation angle direction of the lever, and the projection (A) has a function of pressing the flexible substrate against the contact point of the contact.
Also, the projection (B) is provided with a function of making contact with the housing base (B) with a margin so that the lever operation characteristic line for obtaining the self-clocking effect can be set to the housing base (B). And the protrusion (B) of the lever can be obtained without using a flexible substrate.

Further, thereby, the maximum contact force allowable by the flexible substrate can be set at the end of the lever operation, and the connector characteristics can be secured and maintained at a higher level, or Even if you do not set the maximum allowable contact force,
No extra stress is applied to the flexible substrate, so that the number of repetitive mountings of the flexible substrate can be extended, and the environmental resistance can be improved.

The housing has an opening at the top, a contact fixing piece extending from the rear of the housing toward the front and a contact portion provided at the tip thereof and electrically connected to the flexible substrate, and a lead terminal piece. A plurality of contacts attached to the housing from the rear side, and a lever rotatably supported above the housing and pressing and fixing the flexible board against the housing at a predetermined rotation position, Has two contact portions electrically connected to the flexible substrate, and the rotational center of the lever for pressing and fixing the flexible substrate and the two contact portions are arranged in an isosceles triangular positional relationship, so that the rotational center is Is half of the force received by the two contact portions, that is, the contact force per contact portion depends on the positional relationship of the isosceles triangle. The self-clocking effect can be obtained by equilibrating, and even if the maximum contact force that can be tolerated by the flexible board cannot be set at the end of lever operation, two contact points per contact are provided, so that environmental resistance performance Can be greatly improved, and high reliability can be ensured.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a connector for a flexible substrate according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a state before assembling contacts to the connector according to the first embodiment of the present invention.

FIGS. 3A to 3C are side cross-sectional views showing the process of pressing and fixing a flexible substrate on the connector according to the embodiment of the present invention; FIG.

FIGS. 4A to 4C are side sectional views of a contact portion showing a process of pressing and fixing a flexible substrate to the connector according to the first embodiment of the present invention.

FIG. 5 is a rear view showing a flexible board connected to the connector of the present invention.

FIGS. 6A and 6B are diagrams showing a relationship between a lever rotation angle and a lever operation force of the connector of the present invention.

FIGS. 7A to 7C are side sectional views of a contact portion showing a process of pressing and fixing a flexible substrate to a connector according to a second embodiment of the present invention.

8 (A) to 8 (C) are cross-sectional views showing a process of mounting a flat cable of a conventional connector.

FIG. 9 is a cross-sectional view of another conventional connector.

FIG. 10 is a diagram showing a relationship between a rotation angle of a lever or a pressing member of a conventional connector and an operation force of the lever or the pressing member.

[Explanation of symbols]

 301, 401 Flexible board connector 302, 402 Housing 303 Base part (A) 304 Base part (B) 305 Side wall part 306 Slit part 307 Bearing part 308 Convex part 310, 410 Contact 311 Contact piece 312 Fixed piece 313, 412 Lead terminal piece 314,414 Elastic support piece 315 Contact part 320,417 Lever 321 Lock part 322 Projection (A) 323 Projection (B) 325,425 Flexible board 411 Contact fixing piece 415a Contact part (A) 415b Contact part (B ) 416 Rotation axis 418 Flat part 419 Projection

Claims (7)

[Claims] 1. A housing in which an insertion direction of a flexible substrate is a front-rear direction and which is open at an upper portion, and a contact portion which extends forward from the rear of the housing and is electrically connected to the flexible substrate at a tip thereof. A plurality of contacts having a contact piece, a lead terminal, and an elastic support piece attached to the housing from the rear side, and rotatably supported above the housing, and with respect to the housing at a predetermined rotation position. A flexible board connector having a lever for pressing and fixing the flexible board, wherein the lever moves over a surface provided on the housing in a process of rotating the lever and a projection for pressing the flexible board against the contact. And a locking portion curved toward the center of rotation of the lever,
A connector for a flexible substrate, characterized in that the engagement portion and the distal end of the elastic support piece of the contact are fitted to rotate around the distal end of the elastic support piece. 2. A housing in which the flexible substrate is inserted in front and rear directions and whose upper part is open, and a contact portion extending forward from the rear of the housing and electrically connected to the flexible substrate is provided at the tip thereof. A plurality of contacts, each having a contact piece, a lead terminal, and an elastic support piece, attached to the housing from the rear side, and rotatably supported above the housing, and with respect to the housing at a predetermined rotation position. A flexible board connector having a lever for pressing and fixing the flexible board, wherein the housing has a flat board portion into which the flexible board is inserted, and a board portion higher than the flat board portion provided at both ends thereof. The lever has a protrusion for pressing a flexible substrate against the contact, and the lever is rotated during the rotation process of the lever. It has a projection that comes into contact with the upper surface of the high substrate portion so as to get over it, and a locking portion that is curved toward the center of rotation of the lever, and the locking portion and the tip of the elastic support piece of the contact are fitted. Accordingly, the connector for a flexible substrate is rotated about the tip of the elastic support piece. 3. A housing in which the flexible board is inserted in the front-rear direction and which is open at the top, and a contact portion extending forward from the rear of the housing and electrically connected to the flexible board is provided at an end thereof. A plurality of contacts having a fixed contact piece, a lead terminal piece, and an elastic support piece attached to the housing from the rear side; and a plurality of contacts rotatably supported above the housing. A connector for a flexible substrate, comprising: a lever for pressing and fixing the flexible substrate with respect to the flexible substrate, wherein the contact has two contact portions electrically connected to the flexible substrate. . 4. The flexible board connector according to claim 3, wherein a center of rotation of a lever for pressing and fixing the flexible board and the two contact portions are arranged in a positional relationship of an isosceles triangle. . 5. A housing in which the insertion direction of the flexible substrate is the front-rear direction and the upper portion is open, and a contact portion extending forward from the rear of the housing and electrically connected to the flexible substrate is provided at an end thereof. A plurality of contacts having a fixed contact piece, a lead terminal piece, and an elastic support piece attached to the housing from the rear side; and a plurality of contacts rotatably supported above the housing. A lever for pressing and fixing the flexible substrate with respect to the flexible substrate, wherein the lever is provided on the housing in a process of rotating the lever and a projection for pressing the flexible substrate against the contact. And the contact fixing piece has two contact portions. A connector for a flexible substrate characterized by the following. 6. A housing having a flexible board inserted in a front-rear direction and having an open upper portion, and a contact portion extending forward from the rear of the housing and electrically connected to the flexible board at an end thereof. A plurality of contacts having a fixed contact piece, a lead terminal piece, and an elastic support piece attached to the housing from the rear side; and a plurality of contacts rotatably supported above the housing. And a lever for pressing and fixing the flexible substrate with respect to the flexible substrate connector, wherein the housing has a flat substrate portion into which the flexible substrate is inserted, and the flat substrate portions provided at both ends thereof. A substrate portion that is higher than the substrate portion, wherein the lever has a protrusion that presses the flexible substrate against the contact, and a rotation of the lever. And a projection which comes into contact with an upper surface of the high substrate portion in a moving process, and wherein the contact fixing piece has two contact portions. 7. The contact point of the contact fixing piece and the center of rotation of a lever for pressing and fixing the flexible substrate are arranged in an isosceles triangular positional relationship. The connector for a flexible substrate as described in the above.