JP3184154B2 - Flexible board connector - Google Patents

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 connection portion 205 for connecting to the rotation support portion 204 and the flexible substrate 209 of the ten 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 a 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 fixing piece provided with a contact portion electrically connected to the flexible substrate at a tip thereof, a lead terminal piece, and an elastic support piece attached to the housing from the rear side. If, rotatably supported above said housing, and a lever for pressing and fixing the flexible substrate relative to the housing at a predetermined rotational position
The contact is electrically connected to the flexible substrate.
It has two contact portions that are electrically connected. Flexiv
The center of rotation of the lever that presses and fixes the
The contact points are preferably arranged in a positional relationship of an isosceles triangle.
New

According to the present invention, the insertion direction of the flexible substrate is the front-rear direction, and the housing is open at the top and extends forward from the rear of the housing and is electrically connected to the flexible substrate at the tip. A plurality of contacts, each having a contact fixing piece provided with a contact portion to be provided, a lead terminal piece, and an elastic supporting piece, attached to the housing from the rear side, and rotatably supported above the housing; frame and a lever for pressing and fixing the flexible substrate relative to the housing in rotational position
In the connector for a kibble board, the housing includes:
A flat base into which the flexible board is inserted, and both
A base portion higher than the flat base portion provided at the end portion;
The lever has a portion facing the flat base portion
To press the flexible substrate against the contact.
And the high base in the process of turning the lever at both ends
And a projection that contacts the upper surface of the
The contact fixing piece has two contact portions.
A connector for a printed circuit board is obtained. The flexible substrate
The center of rotation of the lever to be pressed and fixed and the contact fixing piece
Contact points are arranged in an isosceles triangle
It is characterized by the following.

[0011]

About an embodiment of the DETAILED DESCRIPTION OF THE INVENTION Hereinafter the present invention
This will be described with reference to the drawings . Embodiments of the present invention
7 and its description, but to facilitate understanding of the present invention.
For ease of explanation, first, the related art prior to the present invention
This will be described with reference to FIGS. FIG. 1 precedes the invention
FIG. 1 is a view showing the overall configuration of a connector for a flexible substrate according to a related art, in which a connector 301 is composed of members 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. FIGS. 6 and 7 are graphs showing 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.

The bases (B) provided on both sides of the contact group are provided between the plurality of contacts, and the projections (A) and (B) of the lever are located at positions corresponding to the bases (B). It goes without saying that the same effect can be obtained even if it is provided.

Next, an embodiment of the present invention will be described with reference to FIG. The connector for the flexible substrate of the present embodiment
FIG. 1 of the related art shown in FIG.
Housing 402, contacts 41
0 and a lever 417. This implementation
The main difference between the contact form and the related art is that the contact
In the structure. Figure 7 (A) ~ (C) is a side sectional view of the contact part of a process of the flexible board 425 is pressed and fixed to the connector 401 of the flexible substrate connector according to an embodiment of the present invention, prior related the above Technical
FIG. 5 is a diagram corresponding to FIGS. 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 the lever 417 rotates, 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. Incidentally, an embodiment of the present invention, does not show cross-sectional side view of an outer contact group showing a process for pressing and fixing the flexible substrate to the connector, these are indicated in the relevant prior art to the present invention FIG.
Since it is the same as the side sectional view of (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 the overall configuration of a connector for a flexible substrate according to a related art prior to the present invention.

FIG. 2 is a perspective view showing a state before assembling a contact to a connector of a related art prior to the present invention.

FIGS. 3A to 3C are related arts prior to the present invention.
FIG. 10 is a side sectional view of the outside of a contact group showing a process of pressing and fixing a flexible substrate to the connector of FIG.

4 (A) to 4 (C) are related arts prior to the present invention.
FIG. 7 is a side sectional view of a contact portion showing a process of pressing and fixing a flexible substrate to the connector of FIG.

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

FIGS. 6A and 6B are related arts prior to the present invention.
FIG. 6 is a diagram showing the relationship between the rotation angle of the lever of the connector and the operating force of the lever.

FIGS. 7A to 7C show an embodiment of the present invention.
FIG. 3 is a side sectional view of a contact portion showing a process of pressing and fixing a flexible substrate to a connector.

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.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) H01R 12/28

Claims (5)

(57) [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 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. . Wherein said flexible substrate connector according to claim 1, wherein a rotation center of the lever the flexible substrate to press-fixed two contact portions are arranged in a positional relationship of an isosceles triangle . 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 having a lever for pressing and fixing the flexible substrate with respect to said lever, flexible base to be inserted
A portion that opposes the plate has a protrusion that presses the flexible substrate against the contact, and is contacted at both ends so as to ride on the upper surface of a base portion provided on the housing during the rotation of the lever. A connector for a flexible board, comprising a projection and the contact fixing piece has two contact portions. 4. A housing in which the flexible board is inserted in the front-rear direction and whose upper part is open, 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 flexible board connector having a lever for pressing and fixing the flexible board with respect to the housing, wherein the housing has a flat base portion into which the flexible board is inserted, and the flat base portions provided at both ends thereof. A base portion that is higher than the base portion;
A portion opposing the flat base portion has a protrusion for pressing the flexible substrate against the contact, and is provided at both ends so as to get over the upper surface of the high base portion in the process of rotating the lever. A connector for a flexible substrate, comprising: a projection for contact; and the contact fixing piece has two contact portions. 5. A method according to claim 3 or 4, wherein the two contact portions of the flexible substrate and the center of rotation of the lever for pressing and fixing the contact fixing piece which is arranged in a positional relationship of an isosceles triangle The connector for a flexible substrate as described in the above.