JP3121799B2 - Electrical connector for flexible board - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an electrical connector for a flexible board.

[0002]

2. Description of the Related Art Japanese Patent Laid-Open No.
There is an electrical connector for a flexible board disclosed in Japanese Patent No. 142130. This connector is shown in FIGS.
As shown in FIG. 2, a housing 1 formed of an insulating material
The front half of the opening in the depth direction has an opening 2 facing upward. At the both ends of the opening 2 in the width direction of the housing 1, flange-shaped holding portions 3 are integrally formed. A shaft support 4 which forms a semicircular recess is formed on the innermost end face of each of the holding portions 3.

[0003] A pressure member 5 for opening and closing the opening 2 is rotatably mounted on the shaft support 4 while a shaft 6 protruding from the left and right side surfaces thereof is housed therein. Between the holding parts 3 of the housing 1, holding grooves 8 for accommodating a plurality of contacts 7 in the depth direction and ridges 9 for separating the adjacent holding grooves 8, 8 are alternately provided in parallel. A support 10 for projecting the distal end of the flexible substrate F to the pressing member 5 side is provided on the upper surface of the deep portion of the mountain portion 9. In the drawing, reference numeral 11 denotes a substantially U-shaped fixing bracket, which is fixed by inserting one upright portion into the holding portion 3 into a slot 12 formed in the depth direction from the front end face thereof. This is for fixing the housing 1 to the printed circuit board by soldering at the fixing bracket 11.

Therefore, a flexible board F is inserted through the opening 2 into the housing 1 fixed to the printed circuit board, and the pressing member 5 is closed in the closing direction (FIG. By pivoting to the left, the contact portion 7A of the contact 7 and the support portion 10 of the housing 1 are rotated.
Are formed so that two supporting points are formed on the lower surface side of the flexible substrate F, and the pressing corner 5A of the pressing member 5 presses the flexible substrate F between the two supporting points 7A and 10 from the upper surface side. I have.

[0005]

However, when the pressing member 5 is rotated in the closing direction (left direction in the drawing) and the flexible substrate F is pressed from the upper surface by the pressing corner 5A. The pressing member 5 receives an upward reaction force, but this reaction force is received only by the shaft portion 6 and the shaft support portion 4 of the pressing member 5, so that the force for pressing the flexible substrate F from the upper surface side. Is weak. Therefore, the flexible substrate F and the contact 7
When the contact pressure with the contact portion 7A becomes low, there is a problem in terms of reliability from the viewpoint of electrical contact only with this one-point contact.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and has a high contact pressure between a flexible substrate and an electric contact so that electric contact is reliable. It is an object of the present invention to provide a connector having a large structural strength. The gist of the present invention is to provide a housing having an opening in the upper part of the front half and a lower electric contact arm having a contact part which is upwardly convex on the top surface of the tip. And an electrical connector mounted on the housing formed in a U-shape by connecting at the rear end an upper support arm having a substantially circular projection on the lower surface of the tip, and provided on both side surfaces of the housing And a lid-shaped pressing member that opens and closes the opening provided with a rotation groove that is rotatably engaged with the projection on the top surface on the tip side when the holding part is rotatably mounted on the shaft. For electrical connectors for flexible substrates The upper surface of the electric contact arm portion of the electric connector is formed as an inclined surface which is inclined downward from the rear end toward the front end, and the pressurizing member is turned around the shaft mounting portion and the protrusion to close the pressurizing member. At the time, the pressing corner formed on the lower surface on the distal end side of the pressing member presses the flexible board inserted into the opening downward between the contact portion and the base of the electric contact arm portion, and An electrical connector for a flexible substrate, characterized in that it is configured to be connected at two points of a contact portion and a base portion of an electrical contact arm portion.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the embodiments shown in FIGS. 1 to 9. In the drawings, reference numeral 11 denotes a rectangular parallelepiped housing which is formed of a resin insulating material. The upper surface of the front half of the housing 11 from the center in the depth direction has an opening 12. Further, on both side surfaces of the housing 11 in the width direction, the holding portions 1 each having a prism shape are provided.
3 are integrally formed in the depth direction.
At the center of 13, there is formed a slot 14 having a rectangular shape in cross section, which is open from the front end face to the lower face in the depth direction.

Further, on both sides of the housing 11,
At the depth end of the upper position of the holding portion 13, a rectangular parallelepiped convex portion 15 is provided in parallel with the holding portion 13, and the depth between the holding portions 13 of the housing 11 is small. A plurality of electrical connectors 1 having a structure to be described later in the direction
Receiving grooves 17 for accommodating the individual 6 are provided in parallel with each other via a ridge portion 18.

The electric connector 16 is formed of a conductive metal plate having an elastic force. As shown in FIG. 3, a lower electric contact arm 19, an upper support arm 20 and A connecting portion 21 provided at a rear end for connecting the two arm portions 19 and 20 in parallel and integrally, protruding out of the housing 11 from the connecting portion 21, and soldered to a circuit wiring portion BW on the circuit board B. And a connection portion 22.

The upper and lower surfaces 19A and 19B of the electric contact arm 19 are connected to the base 23 on the connecting portion 21 side.
The contact portion 24 is formed on the upper surface of the distal end portion of the electric contact arm portion 19 to project upward. On the other hand, a substantially circular projection 25 is provided on the lower surface of the distal end of the support arm 20, and the projection 25 is
4 is provided at a position slightly behind.

The electric connector 16 is provided in the housing 1.
1 is inserted into the receiving groove 17 from the rear portion thereof and is fixed. At this time, the upper surface 19A of the electric contact arm portion 19 near the contact portion 24 and the base portion 23 is located between the receiving grooves 17, 17. It is located at a position higher than the upper surface of the projecting mountain portion 18, and the tip of the electric contact arm portion 19 is separated from the bottom surface 17 </ b> A of the receiving groove 17 so that the tip can be lowered. .

Reference numeral 26 denotes an upright metal support plate having a substantially rectangular shape mounted on the holding portion 13 of the housing 11, and an upper edge 26A in the longitudinal direction is mounted on the holding portion 13 as shown in FIG. When the pressure member 33 is bent outwardly, it is bent at an obtuse angle so that the pressure member 33 to be described later can easily enter when closed. An arm 27 inserted into the slot 14 of the holder 13 is provided below the support plate 26.
6, a long groove 2 opening from the near side to the rear end along the longitudinal direction
8.

A short groove 29 is formed in the support plate 26 in parallel with a position above the long groove 28 so as to fit into the convex portion 15 protruding from both sides of the housing 11. At the rear position of the groove 29, a pressing member 33 described later is provided.
The shaft hole 30 in which the support shaft 34 is rotatably supported is opened. When the support plate 26 is mounted on the holding portion 13 of the housing 11, the shaft hole 30 is located coaxially with the projection 25 of the electric connector 16 fixed to the receiving groove 17.

Numeral 31 denotes a rectangular locking hole provided in the support plate 26, which is formed by half blanking, and is formed at a position behind the shaft hole 30, that is, at a front side of the support plate 26. . Reference numeral 32 denotes a fixing portion provided at the center of the lower end of the arm portion 27 of the support plate 26. When the housing 11 is mounted on the holding portion 13, the circuit board B stands upright through the lower surface of the holding portion 13 to the outside. It is soldered to a predetermined upper part. 26B is a holding portion 1 of the housing 11.
3 is a locking claw for fixing the support plate 26 to the support plate 3.

Reference numeral 33 denotes a pressure member which is formed in a lid shape for opening and closing the opening 12 of the housing 11.
An end surface of each of the support shafts 34 is formed by an inclined surface 34A whose lower half is inclined downward from the center thereof when the pressurizing member 33 is erected. Metal support plate 2 fixed to left and right
The work of mounting the pressure member 33 from above is facilitated between 6 and 26.

On the top surface of the distal end of the pressing member 33, a turning groove 35 is formed in the width direction to be rotatably engaged with the projection 25 of each of the support arms 20 of the electric connector 16. On the opposite surface facing the rotation groove 35, an obtuse pressing corner portion 36 is formed in the width direction at a joint portion between the adjacent flat surfaces 33A and 33B. Further, locking holes 3 of the support plate 26 are provided on the left and right side surfaces of the pressing member 33.
1 is provided with a locking projection 37 that can be fitted therein, and this locking projection 37 is formed in a chevron shape to facilitate engagement with the locking hole 31.

Next, the operation of the connector according to the present invention will be described. An electric connector for a flexible board according to the present invention is placed on a mounting portion on a circuit board B, and then the fixing portion 32 is attached to a metal part on the circuit board B. The connection portion 22 of the electrical connector 16 is soldered to the portion M and connected to the circuit wiring portion BW on the circuit board B by soldering. Then, as shown in FIG. 2, in order to open the opening 12 of the housing 11, the pressing member 33 is moved by its support shaft 34 and the rotation groove 35.
Is rotated rightward in the drawing around the projection 25 with which the engaging member 25 is engaged, and the surface of the pressing member 33 on the side of the rotation groove 35 is brought into contact with the front edge 11A of the rear upper surface of the housing 11. Upright. At this time, even if the pressing member 33 is rotated excessively, there is no possibility that the shaft hole 30 which is a bearing portion of the support shaft 34 is made of the metal support plate 26, so that the shaft hole 30 is not damaged.

After the pressure member 33 is rotated as described above to open the opening 12 of the housing 11 to the state shown in FIG. 2, the lower end of the pressure member 33 is opened as shown in FIG. A flexible board F is inserted from the insertion space between the contact point 33B and the contact section 24 of the electric contact arm section 19 so that its circuit section faces downward. The base 23 is made to enter until it comes into contact with the upper surface 19A of the base 23 which gradually ascends toward the rear end.

Next, as shown in FIG. 7, the projecting portion 25 with which the support shaft 34 and the rotating groove 35 are engaged so that the opening 12 of the housing 11 is closed by the pressing member 33. When the pressure member 33 rotates rightward in the drawing (the direction of the arrow) as the rotation center, the pressure corner 36 of the pressure member 33 contacts the upper surface of the flexible substrate F, and presses the flexible substrate F downward. Thereby, the electric contact arm portion 19
Is elastically deformed downward with its base 23 as a fulcrum.

At the same time, the support shaft 34 of the pressing member 33 receives an upward force due to the reaction force, and most of the reaction force is connected to the electric connector engaged with the rotation groove 35 of the pressing member 33. 1
6 is eliminated by the protruding portion 25 provided on the support arm portion 20, and the load applied to the support shaft 34 and the shaft hole 30 of the pressing member 33 is small. Therefore, while the support shaft 34 and the shaft hole 30 are not much damaged, the reaction force at the engaging portion between the rotation groove 35 and the projection 25 causes the pressing corner portion 36 of the pressing member 33 to move. , The pressing force on the flexible substrate F increases.

Further, when the rotation of the pressing member 33 is continued, the pressing corner 36 of the pressing member 33 slides on the upper surface of the flexible substrate F, as shown in FIG. The pressing member 33 is moved to the depth direction of the housing 11 from the center of the protruding portion 25 of 20 and the pressing member 33 is set at a predetermined rotation position shown in FIG.

When the pressing member 33 is set in this state, the lower surface side of the flexible substrate F is electrically connected to two points of the electric contact arm portion 19, the contact portion 24 thereof, and the upper surface 19A of the base portion 23, respectively. At the same time, the flexible substrate F is pressed from the upper surface side thereof by the reaction force of the rotating groove 35, the projection 25 and the engaging portion, so that the flexible substrate F and the electric contact arm portion 19 are The contact portion 24 and the upper surface 19A of the base portion 23 are firmly pressed against each other,
Electrical connection is made in a stable state.

At the same time, when the opening 12 of the housing 11 is stopped in a state in which the opening 12 is completely closed by the pressing member 33, the locking projection 37 provided on the pressing member 33 engages with the locking hole 31 of the support plate 26. Since the locking member is locked together, the pressing member 33 does not rotate and the opening 12 of the housing 11 is not opened carelessly.

[0024]

As described above, the electrical connector for a flexible board according to the present invention has a housing having an opening above the front half and a lower electrical contact arm having a contact portion which is upwardly convex on the top surface of the tip. And an electrical connector mounted on the housing formed in a U-shape by connecting at the rear end an upper support arm having a substantially circular projection on the lower surface of the tip, and provided on both side surfaces of the housing And a lid-shaped pressing member that opens and closes the opening provided with a rotation groove that is rotatably engaged with the projection on the top surface on the tip side when the holding part is rotatably mounted on the shaft. In the electric connector for a flexible substrate, the upper surface of the electric contact arm portion of the electric connector is inclined downward from the rear end toward the front end, and the pressing member is turned around the shaft mounting portion and the protrusion. Moved and closed A pressing corner formed on the lower surface on the distal end side of the pressing member presses the flexible substrate inserted into the opening downward between the contact portion and the base of the electric contact arm, thereby forming the electric contact arm. Since the contact portion of the portion and the base portion are connected at two points, by closing the opening by the pressurizing member, the flexible substrate and the electrical connector are electrically connected to the contact portion of the electrical contact arm portion. When two contact points are made with the base, there is an effect that the reliability is improved because the contact pressure of the contact part is high.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a connector for a flexible substrate according to the present invention.

FIG. 2 is a perspective view at the time of assembly.

FIG. 3 is a perspective view of an electric connector.

FIG. 4 is a perspective view of a support plate.

FIG. 5 is a sectional view taken along the line II-II of FIG. 2;

FIG. 6 is a cross-sectional view in a state where a pressing member is opened.

FIG. 7 is a cross-sectional view of the pressing member in the course of rotation.

FIG. 8 is a cross-sectional view of the pressing member during rotation.

FIG. 9 is a cross-sectional view illustrating a state in which the pressing member is closed.

FIG. 10 is an exploded perspective view of a conventional flexible board connector.

FIG. 11 is a perspective view of the connector when it is assembled.

FIG. 12 is a sectional view showing an operation state of the connector.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 11 Housing 12 Opening part 13 Holding part 16 Electric connector 19 Electric contact arm part 19A Same upper surface 20 Support arm part 23 Base part 24 Contact part 25 Projection part 33 Pressing member 34 Support shaft 35 Rotating groove 36 Pressing corner part F Flexible substrate

Claims (1)

(57) [Claims] 1. A housing having an opening above the front half, a lower electric contact arm having an upwardly projecting contact on the top of the tip, and an upper having a substantially circular projection on the bottom of the tip. An electric connector mounted on the housing formed in a U-shape by connecting the supporting arm portions at the rear end, and a rotatable shaft mounted on holding portions provided on both side surfaces of the housing. An electric connector for a flexible substrate comprising: a lid-shaped pressing member that opens and closes the opening provided with a rotation groove rotatably engaged with the protrusion on an upper surface; The upper surface of the pressing member is inclined downward from the rear end toward the front end, and when the pressing member is turned around the shaft mounting portion and the protrusion to be closed, the lower surface on the tip side of the pressing member The pressing corner formed at the Between the contact portion and the base portion of the arm portion, and characterized in that the flexible board inserted into the opening is pressed down, and configuration to connect with a two-dot contact portion and the base portion of the electrical contact arms Electrical connector for flexible substrates.