JPH1074566A - Connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connector which enables electrical conductivity by assuring a contact between wiring patterns. SOLUTION: Flexible printed boards 1 and 2, or the flexible printed board and a pressure-contact connection part thereof are covered with an elastic pressing member 3 formed of elastic material. The elastic pressing member 3 is elastically deformed by the presence of keeping members 4, 5 and 6 to generate pressing force in the pressure-contact connection part. A pressing surface is formed between the elastic pressing member 3 and the pressure- contact connection part elastically deformed by the generation of the definite pressing force so as to uniformly distribute weight therein.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connector used for an electronic device such as a camera, and more particularly to a connector for connecting a plurality of wiring patterns of a flexible printed circuit board to a wiring pattern of another flexible printed circuit board or a printed circuit board. It is about connectors.

[0002]

2. Description of the Related Art Conventionally, as a method of connecting a plurality of wiring patterns of a flexible printed circuit board (hereinafter referred to as FPC) or of an FPC and a hard printed circuit board, for example, a method of connecting by pressing an elastic member such as silicon rubber is used. FIG. 7 shows a conventional example. FIG. 7 shows the FP
It is sectional drawing showing the state at the time of connecting the wiring pattern of C.

In FIG. 1, reference numeral 31 denotes a camera main body, 32 denotes a first FPC, 33 denotes a second FPC, 34 denotes a connect rubber, 35 denotes a pressing plate for pressing the connect rubber 34, and 36 denotes a screw. First FP provided on camera body 31
A plurality of wiring patterns 32-1 and 33-1 are formed on the C32 and the second FPC 33, respectively, and are arranged in an orderly manner so that the respective wiring patterns are connected to each other. 1 and 33-
A connection rubber 34 sized so as to completely cover an area to which the connection rubber 1 is connected is provided.
A press plate 35 set to lock and press the cover 4 is covered, and the press plate 35 is pulled into the camera main body 31 by a screw 36, whereby the connect rubber 34 is compressed to connect the wiring pattern.

[0004] The connecting rubber 34 is a wiring pattern 3.
When the 2-1 and 33-1 are pressed, the wiring patterns 32-1 and 33-1 are completely covered and the cross section CC ′ is taken.
As shown in FIG. 8, the pressing is performed on the flat surface 34-1.

[0005] The wiring patterns 32-1 and 32-3 shown in FIG.
3-1 are arranged so as to face each other as independent wiring patterns on the left and right from the substantially central portion of the press-contact portion, so that a flat portion is formed on the connect rubber 34 with respect to a region pressing the wiring patterns, At the center thereof, a concave portion 34-2 is formed so as to be pushed along the wiring pattern portion.

[0006]

However, in the above-mentioned conventional example, since the silicone rubber, which is an elastic body, is compressed and used, there are the following disadvantages.

First, in order to make the contact pressure of each of the wiring patterns to be connected uniform and complete conduction, it is necessary to manage the amount of deformation which is the amount of crushing of the silicon rubber. The distance between the screw 36 shown in FIG. 7 from the screw stopper at the center and the end of the wiring pattern changes, so that the repulsive force when pressed by the pressing member 35 changes. The repulsive force of the rubber is increased, and the contact pressure between the center portion and the end portion is changed, thereby causing a conduction failure of the wiring pattern to be pressed and connected.

When the silicon rubber is pressed and compressed by the pressing plate 35, this compressive force is applied not only in the direction of bringing the wiring patterns into contact with each other but also in the lateral direction perpendicular to the force. The contact pressure between the center and the end of the wiring pattern changes due to the escape. For example, when three or more FPCs are pressed against each other with connect rubber, the pressing surfaces of the FPCs become uneven due to a coverlay film, an adhesive, or the like. As a result, poor conduction of the wiring pattern easily occurs.

An object of the invention according to the present application is to provide a connector that can surely make contact between wiring patterns and achieve electrical conduction.

[0010]

A first structure for realizing the object of the present invention according to the present invention is formed of an elastic member applied to flexible printed circuit boards or a press-fit connection between the flexible printed circuit boards and the printed circuit board. Elastic pressing member, and a pressing member that elastically deforms the elastic pressing member to apply a pressing force to the press-connecting connection portion, wherein the elastic pressing member is elastically deformed by applying a predetermined pressing force. A connector characterized in that a pressing surface with a press-connecting portion is formed to be a uniform load surface.

According to a second configuration for realizing the object of the invention according to the present application, in the first configuration, the elastic pressing member is formed such that a pressing surface is formed in a convex shape at a distal end portion of the elastic pressing member main body. Connector.

According to a third configuration for realizing the object of the invention according to the present application, in the first configuration described above, the elastic pressing member has an arc-shaped pressing surface formed entirely on a distal end portion of the elastic pressing member main body. A connector having a projection formed thereon.

[0013] A fourth structure for realizing the object of the invention according to the present invention is the above-mentioned first or second structure, wherein the elastic pressing member has a pressing surface with a concave portion provided on the contact side as a boundary. Is formed, and at least one of the pressing surfaces is formed so that the pressure contact surface of the divided pressing surface is smaller than the divided width.

According to a fifth configuration for realizing the object of the invention according to the present application, in the first or second configuration, the elastic pressing member has a pressing surface with a concave portion provided on the contact side as a boundary. Are formed, and at least one of the pressing surfaces is positioned at a position corresponding to a substantially central portion of the wiring pattern to be pressed.
A connector characterized in that a projection such as a shape is formed.

A sixth configuration for realizing the object of the invention according to the present application is a connector in any of the above configurations, wherein the elastic pressing member is formed of a rubber member.

According to a seventh configuration for realizing the object of the invention according to the present application, in each of the above-described configurations, the pressing surface of the elastic pressing member is substantially the same as the opening of the cover lay film of the flexible printed circuit board to be pressed and connected. The connector is characterized in that it has the same size and is formed in an R shape having a vertex substantially at the center in the longitudinal direction.

In the above configuration, the pressing surface of the connect rubber as the elastic pressing member for pressing the FPC or the hard printed board has a point contacting surface such as a protruding portion. When the connect rubber is deformed and pressed, first, the point contact surface or the protruding portion contacts the wiring pattern, and when a certain amount of deformation is exceeded, the peripheral portion of the contact surface of the connect rubber is deformed and compressed. Works. Thus, in the portion where the wiring pattern is first pressed, the reliability of conduction is improved because the wiring patterns try to make point contact with each other, and conduction can be performed even if the pressing force of the pressing member is small.

The pressing surface of the connect rubber as the elastic pressing member for pressing the FPC or the hard printed board is as follows:
Since the R surface is formed with the longitudinal center portion of the connect rubber as the vertex, when the connecting rubber is deformed by the pressing member, as the pressure is sequentially applied to the wiring pattern from the center portion and approaches the end portion, For example, by being close to the screw tightening portion for attaching the pressing member, the pressure of the pressing member is increased, the force of the central portion and the end portion is balanced, and it is possible to press the wiring patterns uniformly, and the reliability of conduction is improved. improves.

[0019]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIGS. 1 to 3 show a first embodiment of the present invention. In these figures, 1 is the first F
PC, 2 is a second FPC, 3 is a connect rubber, 4 is a camera body, and a part thereof is shown in the figure. Reference numeral 5 denotes a holding plate, and reference numeral 6 denotes a screw for fixing these components to the camera body.

The first FPC1 and the second FPC2 have a plurality of wiring patterns 1-1 and 2-1 formed on a base film such as a polyimide film, and a plurality of wiring patterns 1-1 and 2-1 for protecting these electrically and mechanically. Coverlay films 1-2 and 2-2 are formed on the wiring pattern.

The connecting portion of the wiring pattern for electrically connecting the first FPC 1 and the second FPC 2 is connected to the connecting portion of the wiring pattern for connecting on the cover lay films 1-2 and 2-2. , The coverlay films 1-2 and 2
-2, the openings 1-3 and 2-3 of the coverlay film having substantially the same size are formed at the portions to be the connecting portions on
An exposed portion for connecting the wiring patterns 1-1 and 2-1 is formed, and the surface thereof is subjected to a surface treatment of Ni-Au, so that electrical continuity is established by the wiring pattern connecting portions 1-4 and 2-4. Will be In the vicinity of the openings 1-3 and 2-3, an FPC
1-5 and 2-5 penetrating through the camera body 4
Are positioned on the camera body 4 by engaging with the positioning shafts 4-1 provided at the two positions.

The first FPC 1 and the second FPC 1
The shape of the connect rubber 3 arranged on the upper part of the PC 2 is shown in FIG.
The shape is as shown in FIG. FIG. 2 is an arrow A in FIG.
It is a side view of the connect rubber 3 seen from the direction.

A concave portion 3-1 is formed in the center of the connect rubber 3 corresponding to the wiring pattern portion which is disposed so as to face and be pressed and connected to the two pressing portions 3-2 distributed to the left and right. On the other hand, the rubber itself is formed so as to be easily deformed. The pressing unit 3-2, to the width L apportioned, and is formed such that the width L ₁ of the flat portion 3-3 is a relationship of L> L _1.

The connect rubber 3 formed as shown in FIG.
It is disposed above the first FPC 1 and the second FPC 2 and is pressed by the holding plate 5. The holding plate 5 is formed with a hole 5-1 for engaging with the positioning shaft 4-2 provided on the camera body 4 and a hole 5-2 for screwing the camera body 4 with a screw. After the hole 5-1 is engaged with the positioning shaft 4-2 of the camera body 4, it is screwed into the screw self-tap hole 4-3 of the camera body 4 with a screw 6 so that the first FPC 1 The second FPC 2 is connected rubber 3
By pressing and joining, electrical conduction can be achieved.

FIG. 3 shows that the connection rubber 3 is a first FP.
It is a figure which presses the wiring pattern 1-1 and 2-1 of C1 and 2nd FPC2. First FPC1 and second FPC
2, the connected wiring patterns 1-1 and 2-1 are
Wiring pattern connecting parts 1-4 and 2-4 are formed in the opening areas 1-3 and 2-3 of the coverlay films 1-2 and 2-2.
The exposed part of is electrically connected.

At this time, the opening 1 of the cover lay film
The second FPC 2 disposed on the upper side is deformed by the connection rubber 3 with reference to the opening areas 3 and 2-3. The surface 3-3 to be pressed by the connect rubber 3 is smaller than the area of the openings 1-3 and 2-3 of the coverlay film and mainly presses the substantially central part of the wiring pattern connection parts 1-4 and 2-4. As a result, it is possible to push the wiring patterns that cause the silicon rubber 3 itself to interfere with the step D caused by the coverlay film of the first FPC 1 and the second FPC 2.

As described above, the portion where the connecting rubber 3 presses the wiring pattern is made smaller than the entire width, and the connection rubber 3 is deformed by pressing the wiring pattern connecting portions 1-4 and 2-4 at the center thereof. By completely transmitting the pressure by the amount to the wiring pattern connection portion, it is possible to connect the connector with higher reliability.

(Second Embodiment) FIG. 4 shows a second embodiment of the present invention.
An embodiment will be described. This embodiment shown in FIG. 4 is a modification of the shape of the pressing portion of the connect rubber 11.

The change in the shape of the connect rubber 11 in FIG. 4 corresponds to the wiring pattern portion disposed so as to oppose, forming a concave portion 11-1 in the center of the connect rubber 11 and distributing it to the left and right. R at the center of the two regions
The only difference is that a projection 11-2 having a shape is formed. Other use states and effects are all the same as those of the first embodiment. In addition, since the concave part formed in the connect rubber of the first embodiment and the second embodiment is an auxiliary part for performing the deformation more smoothly, even if the connect rubber is formed without being particularly formed. No problem.

(Third Embodiment) FIGS. 5 and 6 show a third embodiment of the present invention.

FIG. 5 shows the shape of the connect rubber of the present invention best, and is a side view as viewed from the direction B in FIG. 6, and FIG. 6 is a perspective view when the FPCs are pressed and connected to each other using this connect rubber. is there.

In FIG. 5, reference numeral 21 denotes a connect rubber;
Is a holding plate. In FIG. 6, reference numeral 23 denotes a first FP.
C and 24 are a second FPC, 25 is a camera body, and 26 is a screw.

Connect rubber 21 in the present embodiment
As shown in FIG. 5, this connect rubber 21 is pressed on a pressing surface 21-1 which is a surface pressing an FPC or a printed circuit board.
Has an R shape having a center substantially at the center in the longitudinal direction.
As a result, the thickness of the central portion and the end portion of the connect rubber 21 is set so as to change. Next, the holding plate 22 for holding the connection rubber 21 is set so as to cover the connection rubber 21 in order to make the deformation of the connection rubber 21 as uniform as possible. The deformation of the connect rubber 21 is set as much as possible by the wall 22-2 that presses the connecting rubber 21.

The connect rubber 21 set as described above
Will be described with reference to FIG.

A plurality of wiring patterns 23-1 and 24-1 are formed on the first FPC 23 and the second FPC 24, and a coverlay film for protecting the wiring patterns is provided above the wiring patterns 23-1 and 24-1. The wiring patterns are exposed by 23-2 and 24-2, and electrical conduction can be achieved by pressing them together.

An R-shaped pressing surface 21-1 set to have a size substantially equal to or smaller than the size of the openings 23-2 and 24-2 of the cover lay film formed at this time.
Is provided from above. The first FPC 23 and the second FPC 24 have a positioning shaft 25-1 of the camera body 25 and a screw fixing hole 25-2, respectively.
Through holes 23-3, 23-4, 24-3, 24 corresponding to
-4 are formed and positioned and screwed to the camera body 25.

These FPCs 23 and 24 and connect rubber 2
After arranging 1, the pressing plate 22 is covered so as to cover them from above. Holes 22-3 and 22-4 are formed on the holding plate 22 so as to correspond to the positioning shaft 25-1 and the screw hole 25-2 of the camera body 25 described above.

This positioning hole 22-3 is inserted into the camera body 25.
The screw 26 is engaged with the positioning shaft 25-1
By screwing the components related to the pressure contact portion with, electrical connection by pressure connection becomes possible. At the time when the screws are screwed, the connect rubber 21 is set so that the loads at the center and the ends are more uniform.

As described above, the R-shape is formed such that the height of the center portion and the end portion of the connect rubber is changed, and the screws are fixed from both ends, so that the load is uniformly applied, and the electrical connection of the press-connecting portion is performed. Can be improved in reliability.

[0040]

As described above, according to the present invention,
The simple shape of the elastic pressing member such as the connect rubber improves the reliability of the press-connecting portion, and the pressing member such as a press plate for pressing the connect rubber does not need to particularly consider the deformation of the connect rubber. effective.

Further, an R-shape is provided at the apex at the center in the longitudinal direction of the pressing surface of the connect rubber as an elastic pressing member for press-connecting the FPCs to each other or the FPC and the printed circuit board. By deforming the connect rubber with the holding member, the load on the FPC applied to the center and the end of the connect rubber itself is made uniform,
The reliability of the press-connecting portion is improved, and the pressing surface is formed on one surface, so that the connect rubber can be made with a simpler shape.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of a connector according to the present invention.

FIG. 2 is a side view of the connect rubber as viewed from A in FIG. 1;

FIG. 3 is a cross-sectional view of the connector according to the first embodiment of the present invention, in a state where FPCs are pressed against each other by connect rubber.

FIG. 4 is a view showing a pressing surface of a connect rubber according to a second embodiment of the connector according to the present invention.

FIG. 5 is a view showing a pressing surface of a connect rubber according to a third embodiment of the connector according to the present invention.

FIG. 6 is an exploded perspective view of a connector according to a third embodiment of the present invention.

FIG. 7 is a sectional view of a conventional connector.

FIG. 8 is a sectional view taken along line C-C ′ of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... 1st FPC 2 ... 2nd FPC 3 ... Connect rubber 4 ... Camera body 5 ... Holding plate 6 ... Screw

Claims (7)

[Claims] An elastic pressing member formed of an elastic member applied to a press-connecting portion between flexible printed boards or between a flexible printed board and a printed board; and an elastic pressing member formed by elastically deforming the elastic pressing member. A pressing member for applying a pressing force, wherein the elastic pressing member is formed such that a pressing surface with the press-contacting portion elastically deformed by applying a predetermined pressing force becomes a uniform load surface. And connectors. 2. The connector according to claim 1, wherein the elastic pressing member has a pressing surface formed in a convex shape at a distal end portion of the elastic pressing member main body. 3. The connector according to claim 1, wherein the elastic pressing member has a convex portion having a generally arc-shaped pressing surface formed at a distal end portion of the main body of the elastic pressing member. 4. The elastic pressing member according to claim 1, wherein the elastic pressing member has a pressing surface formed by a concave portion provided on the contact side, and at least one of the pressing surfaces is formed by the divided pressing surface. A connector characterized in that the pressure contact surface of the surface is formed to be smaller than the divided width. 5. The wiring pattern according to claim 1, wherein the elastic pressing member has a pressing surface formed by a recess provided on the contact side, and is pressed against at least one of the pressing surfaces. A connector having an R-shaped projection formed at a position substantially corresponding to a central portion of the connector. 6. The connector according to claim 1, wherein the elastic pressing member is formed of a rubber member. 7. The elastic member according to claim 1, wherein the pressing surface of the elastic pressing member has substantially the same size as the opening of the cover lay film of the flexible printed circuit board to be pressed and connected. A connector characterized by being formed in an R shape having a vertex at a substantially central portion in a longitudinal direction.