JP2002270271A - Pressure-contact connector and its connection mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure-contact connector and its connection mechanism by which connection with a low load with reduced height and shortened conductive passage is made possible. SOLUTION: Penetrating holes 4 fitted in parallel with a housing 1, conductive toe-pins 9 exposed from the bottom face of the housing 1 inserted into each penetrating hole 4, and conductive head-pins 11 inserted into each conductive toe-pin 9 and protruding from the top face of the housing 1 in free sliding are provided. Flanges 10.12 are made protruded outward from the periphery face of each conductive toe-pin and conductive head-pin 11, a bottom face 13 of the flange 12 is made slanted at a given angle against the plane orthogonal to the axis line of the penetrating holes 4, conductive head-pins are clamped and biased toward upside of the housing 1 with a coil spring 14 interposed between the flanges 10.12 of each conductive toe-pin 9 and conductive head-pin 11 to have the conductive head-pin 11 contacted in a slanting state inside each conductive toe-pin 9, and these pins 9.11 are to be a conductive passage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a mobile phone and a PDA.
Electrical connection between liquid crystal panels (COG, COF) used for the display unit of small communication equipment such as, and other electronic equipment and circuit boards, or electrical connection between circuit boards inside equipment
The present invention relates to a pressure contact type connector used for (FPC-PCB, PCB-PCB) and the like, and a connection structure thereof.

[0002]

2. Description of the Related Art Conventionally, when a circuit board for a cellular phone and a liquid crystal module are electrically connected to each other, a pressure contact type in which a plurality of conductive metal wires are arranged on a surface of an elastic elastomer having a substantially semi-oval cross section is provided. You are using a connector. Specifically, a press-fit connector is sandwiched between the circuit board and the liquid crystal module, the liquid crystal module is pressed against the circuit board to compress the press-fit connector, and a conductive metal wire connects the circuit board and the liquid crystal module. ing.

[0003]

By the way, in recent years, portable telephones have been intensively reduced in thickness, size, and weight, and accordingly, it is necessary to reduce the height of the press-connecting connector. However, since the conventional press-connecting connector is configured as described above, the height dimension (5 m
m) is extremely difficult to reduce, so that the conduction path cannot be shortened. Further, there is a strong demand for press-connecting connectors to be connected with a low load.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and has as its object to provide a press-contact type connector which can be connected even with a low load by shortening a height dimension to shorten a conduction path and a connection structure thereof. I have.

[0005]

According to the first aspect of the present invention, in order to achieve the above object, a plurality of through holes provided side by side in a housing, and each of the through holes is inserted and exposed from one surface of the housing. A hollow conductive toe pin, and a conductive head pin that is fitted into each conductive toe pin and protrudes slidably from the other surface of the housing, from the outer peripheral surface of each of the conductive toe pins and the conductive head pin. Each of the conductive toe pins has a flange protruding outwardly, and an opposite surface of the flange of the conductive head pin facing the flange of the conductive toe pin is inclined at a predetermined angle with respect to a plane perpendicular to the axis of the through hole. A spring member is interposed between the flange of the conductive head pin and the flange of the conductive head pin to bias at least the conductive head pin toward the other surface of the housing. It was, together are contacted in an inclined state the conductive head pin in the respective conductive Topin, is characterized in that the these contact with conductive Topin and the conductive head pin was set as the conduction path.

According to another aspect of the present invention, in order to achieve the above object, a plurality of through holes provided side by side in a housing, and a hollow conductive toe pin inserted into each through hole and exposed from one surface of the housing. And a conductive head pin fitted into each conductive toe pin and slidably protruding from the other surface of the housing, wherein a flange is respectively removed from the outer peripheral surface of each of the conductive toe pins and the conductive head pin. Projecting in the direction, a step is formed on the opposite surface of the flange of the conductive head pin facing the flange of each conductive toe pin, and a spring member is interposed between the flange of each conductive toe pin and the flange of the conductive head pin. At least the conductive head pins were urged toward the other surface of the housing, and the conductive head pins were inclined in the respective conductive toe pins. Together are contacted in state is characterized in that so as to these contact with conductive Topin and the conductive head pin and the conduction path.

Further, in the invention according to claim 3,
In order to achieve the above object, the present invention is characterized in that a press-connecting connector according to claim 1 or 2 is interposed between electrodes facing each other to conduct electricity.

Here, the housing in the claims can be freely changed to a rectangle, a square, an oval or the like. The conductive toe pin may protrude as long as it is exposed from one surface of the housing, or may protrude and be slidable by a spring member. The spring member is mainly a coil spring, but if a similar function can be expected, other types of springs can be selected. Further, as an electrical joint having electrodes, at least various types of circuit boards (for example, printed boards, flexible boards, build-up wiring boards, inspection circuit boards), liquid crystal displays, electro-acoustic components (for example, speakers and various microphones) ), Various IC packages, and the like.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to the accompanying drawings. A housing 1 interposed between the first and second electrical joints, a plurality of through holes 4 juxtaposed in the housing 1, and inserted into each of the through holes 4 to be exposed from the lower surface of the housing 1. A hollow conductive toe pin 9 and a conductive head pin 11 fitted into each conductive toe pin 9 and slidably protruding from the upper surface of the housing 1 are provided.
12 are projected, and the opposing surface of the flange 12 of the conductive head pin 11 facing the flange 10 of the conductive toe pin 9 is inclined, and a coil spring 14 is interposed between each conductive toe pin 9 and the flanges 10 and 12 of the conductive head pin 11. Thus, the conductive head pin 11 is elastically urged toward the upper surface of the housing 1.

Although not shown, for example, a circuit board of a mobile phone is used as the first electrical joint. Although not shown, for example, a liquid crystal module of a mobile phone is used as the second electric junction. Opposing electrodes are formed side by side on the opposing surfaces of the first and second electric joints, and the conductive toe pins 9 and the conductive head pins 11 come into contact with the plurality of opposing electrodes, thereby providing electrical conduction. Is secured.

As shown in FIGS. 1 to 3, the housing 1 is formed in a flat rectangular shape by laminating a pair of thin and thin plate plates 2 and 3 one above the other, and has a small diameter penetrating in the longitudinal direction. The holes 4 have a predetermined pitch (for example, 0.
5 to 1.27 mm).
Positioning pins (not shown) pointing downward are selectively implanted at both ends of the housing 1, and each positioning pin is inserted into a positioning hole of the first electric joint, The housing 1 is positioned and fixed. Each of the plate plates 2 and 3 is formed into a plate shape using a general-purpose engineering plastic excellent in heat resistance, dimensional stability, moldability, etc., specifically, ABS resin, polycarbonate, polypropylene, PVC, polyethylene, or the like. I have.
Among these materials, ABS with excellent workability and cost
Resin is best.

As shown in FIGS. 1 and 2, each through hole 4
A diameter-reduced hole 5 drilled in the lower plate 2, a diameter-increased hole 6 continuous above the diameter-reduced hole 5 via a step, and a hole of the lower plate 2 drilled in the upper plate 3. A large diameter hole 7 is formed continuously with the large diameter hole 6, and a small diameter hole 8 is formed above the large diameter hole 7 and continues through a step.

As shown in FIGS. 1 and 2, each conductive toe pin 9 is made of a gold-plated conductive material such as copper, brass, or the like.
It is formed in a bottomed cylindrical shape having a substantially U-shaped cross section using aluminum or the like. The flat bottom surface of this hollow conductive toe pin 9 is slightly (for example, from the bottom surface of the plate plate 2 below).
(0.1 to 1.5 mm, preferably about 0.1 to 1.0 mm).
It is fixed via F or the like to ensure conduction. A ring-shaped flange 10 protrudes radially outward from a lower portion of the outer peripheral surface of the conductive toe pin 9.
The lowering and dropping of the conductive toe pin 9 is effectively restricted by locking the stepped portion between the reduced diameter hole 5 and the enlarged diameter hole 6.

Each of the conductive head pins 11 is shown in FIGS.
As shown in FIG. 2, the conductive material is basically formed in a cylindrical shape using a gold-plated conductive material such as copper, brass, and aluminum. A ring-shaped flange 12 projects radially outward from the outer peripheral surface of the conductive head pin 11, and this flange 12 is engaged with a stepped portion between the large-diameter hole 7 and the small-diameter hole 8 of the plate plate 3, so that the conductive head pin 11 becomes conductive. The detachment of the head pin 11 is restricted.

The lower surface 13 of the flange 12 has a through hole 4 and a conductive head pin 11 as shown in FIGS.
Are inclined at a predetermined angle θ with respect to a plane perpendicular to the axis of the axis. Specifically, an angle θ of 3 ° to 30 °, preferably 1
It is obliquely inclined at an angle θ of 0 ° to 20 °, more preferably at an angle θ of about 15 °. The upper portion of the conductive head pin 11 is curved in a semicircular or hemispherical shape and protrudes from the upper plate 3 (for example, about 0.1 to 1.5 mm, preferably about 0.1 to 1.0 mm). It resiliently contacts the electrodes of the second electrical joint to ensure continuity.

Further, each coil spring 14 is made of phosphor bronze,
It is formed using copper, stainless steel, beryllium copper, piano wire, or a thin metal wire obtained by plating these wires with gold, and is inserted between the conductive toe pin 9 and the conductive head pin 11 to be provided between these flanges 10 and 12. Intervened. The coil spring 14 is made of a thin metal wire having a diameter of 30 to 100 μm, preferably 30 to 80 μm, for example, 50 μm.
It is formed into a simple structure by being wound at an equal pitch of m, and generates a load of 30 to 60 g at the time of compression of 0.5 mm, for example. The diameter of the coil spring 14 is 30 to 100 μm
The reason is that if this range is selected, low cost and low load connection can be easily realized. The load at the time of compression of the coil spring 14 is appropriately selected according to the connection status.

The length of each coil spring 14 is 0.5
が 3.0 mm, preferably about 1.0-1.5 mm. This is because, within this range, adverse effects due to external noise can be avoided and elastic characteristics can be maintained.

In the above configuration, when the first and second electric joints are conducted, the press-connecting type connector is positioned and fixed to the first electric joint, and the first and second electric joints are positioned between the first and second electric joints. The press-connecting connector may be sandwiched, and the second electric joint may be slightly pressed against the first electric joint. Then, the conductive head pin 11 descends against the coil spring 14, and comes into contact with the inner peripheral surface of the conductive toe pin 9 in a state where the peripheral surface of the conductive head pin 11 is slightly inclined (see the arrow in FIG. 2). The conductive toe pin 9 and the conductive head pin 11 form a current conduction path without passing through the coil spring 14 which causes a high resistance, thereby conducting the first and second electric joints.

According to the above configuration, the conductive head pin 11 and the coil spring 14 are integrated, and the conductive head pin 11 is fitted into the conductive toe pin 9 so as to be able to reciprocate. Therefore, the height dimension is extremely small (for example, 1.50). (About 2.00 mm)
And thereby the conduction path can be shortened. In addition, by inclining the flange 12 of the conductive head pin 11 at a predetermined angle θ, the conductive head pin 11 is brought into contact with the conductive toe pin 9 at the time of connection, not perpendicularly, but in a state where the center of gravity is moved.
The conductive toe pin 9 and the conductive head pin 11 can form a low-resistance conductive path. Therefore, unlike the case where the long coil spring 14 wound spirally is used as the conduction path, the conduction path is shortened to significantly reduce the inductance,
That is, excellent high-frequency characteristics can be realized. Specifically, a stable low resistance and low load connection (for example, about 30 to 60 g / pin) of about 1/3 of the conventional one can be greatly expected.

Further, if the lower surface 13 of the flange 12 is inclined at a predetermined angle θ, the rotation of each conductive head pin 11 can be restricted, and irregularity of the pitch can be effectively suppressed and prevented.
This point will be described with reference to FIG. 7. If the upper end surface of the conductive head pin 11 is formed obliquely without tilting the lower surface 13 of the flange 12 at a predetermined angle θ, each conductive head pin 11 It is easy to rotate in the direction of the arrow. Accordingly, with the rotation of the conductive head pin 11, the sharp uppermost end is displaced forward, backward, left and right, and as a result, the pitch with the upper end surface of the adjacent conductive head pin 11 changes,
There are many possibilities that the conduction may be inconvenient.

On the other hand, according to the present embodiment, the lower surface 13 of the flange 12 is inclined in one direction to give directionality, and the end of the coil spring 14 is strongly pressed against the lower surface 13 along the oblique direction. Therefore, each conductive head pin 11 is less likely to slip and rotate. Therefore, the conductive head pin 1
There is no risk that the sharp uppermost end is displaced in the front-rear and left-right directions, so that there is no possibility that the pitch between adjacent conductive head pins 11 changes and that there is no inconvenience in conduction.

Also, since the conductive head pin 11 rubs inside the conductive toe pin 9 in contact with the conductive toe pin 9, a cleaning effect of quickly removing dust and oxide film adhered to the contact portion can be obtained with a simple configuration. In addition, since the coil spring 14 is supported by the flanges 10 and 12 of the conductive toe pin 9 and the conductive head pin 11, assembly is extremely easy. Further, since the housing 1 is interposed between the first and second electric joints, the press-connecting connector can be easily incorporated or mounted on the first electric joint itself,
It becomes possible to greatly improve positioning accuracy and assemblability. Furthermore, since the press-contact type connector is assembled by sandwiching the conductive portion between the pair of plate plates 2 and 3 from above and below, the conductive toe pin 9 and the conductive head pin 1 have a simple configuration.
1. It is possible to very effectively suppress and prevent displacement, drop-out, dropout and the like of the coil spring 14.

FIGS. 8 to 13 show a preferred embodiment of the second aspect of the present invention. In this case, the press-connecting type connector and its connection structure are provided between the first and second electric joints. , A small-diameter through-hole 4 arranged side by side in a row in the housing 1, a bottomed cylindrical conductive toe pin 9 inserted into each through-hole 4 and exposed from the lower surface of the housing 1. A conductive head pin 11 fitted into each conductive toe pin 9 and slidably protruding from the upper surface of the housing 1.

From the lower part of the outer peripheral surface of each conductive toe pin 9 and the outer peripheral surface of the conductive head pin 11, ring-shaped flanges 10 and 12 protrude outward in the radial direction, respectively, and the flanges of the conductive head pin 11 facing the flange 10 of each conductive toe pin 9. A step 15 having a substantially Z-shaped cross section is formed on the lower surface 13 of the partition 12 (see FIGS. 11 to 13). Step portion 15 between flange 10 and flange 12 of each conductive toe pin 9
A coil spring 14 is interposed therebetween, and the coil spring 14 urges the conductive head pin 11 toward the upper surface of the housing 1.

In the above configuration, when conducting the first and second electric joints, the conductive head pins 11 are slightly inclined (see arrows in FIG. 9) into the respective conductive toe pins 9 and contact each other. Contacted conductive toe pin 9 and conductive head pin 11
Form a current conduction path. The other parts are the same as in the embodiment of the first aspect of the present invention, and a description thereof will be omitted.

Also in this embodiment, the same operation and effect as those of the above embodiment can be expected. An uneven step 15 is formed on the lower surface 13 of the flange 12, and the end of a coil spring 14 is strongly pressed against this 15. Since the conductive head pins 11 are engaged with each other, the conductive head pins 11 are less likely to slip and rotate. Therefore,
When the top end of the conductive head pin 11 is inclined and pointed as shown in FIG. 7, the top end does not shift in the front, rear, left and right directions, and the pitch with the adjacent conductive head pin 11 changes or the conduction is inconvenient. There is no risk of occurrence. Further, this is extremely useful when the lower surface 13 of the flange 12 cannot be inclined at a predetermined angle θ.

In the above embodiment, the through holes 4 are arranged in a row in the longitudinal direction of the housing 1. However, the arrangement can be freely changed to two rows, three rows, four rows, or the like. Further, the number of the conductive toe pins 9 and the conductive head pins 11 can be appropriately increased or decreased. In addition, although the conductive toe pin 9 having a U-shaped cross section and a bottomed cylindrical shape is shown, the present invention is not limited to this. For example, the hollow conductive toe pin 9 can be formed into a bottomed rectangular tube or the like, or the bottom of the conductive toe pin 9 can be appropriately changed to a conical shape, a truncated conical shape, a substantially semicircular cross section, or the like. Further, when a hole is formed in the bottom of the conductive toe pin 9 during manufacturing and the inside of the conductive toe pin 9 is plated with gold using this hole, the gold plating can be easily performed.

Further, the flange 10 may be protruded outward from an upper portion of the outer peripheral surface of the conductive toe pin 9 or the like. Further, the conductive head pin 11 may be formed in a prismatic shape or the like, or may be formed in a hollow shape instead of a solid shape. Furthermore, the conductive head pin 11
When the upper end face, which is the tip of the head, is inclined, the angle between the plane perpendicular to the axis of the through hole 4 and the conductive head pin 11 is 3 ° to 30 °.
It is preferable to incline at an angle θ of 0 °, preferably at an angle θ of 10 ° to 20 °, and more preferably at an angle θ of about 15 °.

[0029]

As described above, according to the present invention, there is an effect that the conductive path can be shortened by reducing the height dimension, and a stable connection state can always be maintained even under a low load.

[Brief description of the drawings]

FIG. 1 is a partially sectional explanatory view showing an embodiment of a press-contact type connector and a connection structure thereof according to the first aspect of the present invention.

FIG. 2 is an explanatory sectional view of FIG. 1;

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is a front view showing a conductive head pin in the embodiment of the press-connecting connector and the connection structure according to the first aspect of the present invention.

FIG. 5 is a plan view of FIG. 4;

FIG. 6 is a side view showing a conductive head pin in the embodiment of the press-connecting connector and the connection structure according to the first aspect of the present invention.

FIG. 7 is a view for explaining a problem in the embodiment of the press-connecting type connector and the connection structure according to the first aspect of the present invention.

FIG. 8 is a partially sectional explanatory view showing an embodiment of a press-contact type connector and a connection structure thereof according to the second aspect of the invention.

FIG. 9 is an explanatory sectional view of FIG. 8;

FIG. 10 is a plan view of FIG. 8;

FIG. 11 is a front view showing a conductive head pin in an embodiment of the press-connecting connector and the connection structure according to the second aspect of the present invention.

FIG. 12 is a plan view of FIG.

FIG. 13 is a side view showing a conductive head pin in an embodiment of the press-connecting connector and the connection structure according to the invention described in claim 2;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Housing 4 Through-hole 9 Conductive toe pin 10 Flange 11 Conductive head pin 12 Flange 13 Lower surface (opposite surface) 14 Coil spring (spring member) 15 Step part

Claims (3)

[Claims] 1. A plurality of through holes provided side by side in a housing, a hollow conductive toe pin inserted into each through hole and exposed from one surface of the housing, and another surface of the housing fitted into each conductive toe pin. A press-fit connector including a conductive head pin slidably protruding from said conductive toe pin and a flange protruding outward from an outer peripheral surface of said conductive toe pin and an outer peripheral surface of said conductive head pin to face a flange of each of said conductive toe pins. The opposing surface of the flange of the conductive head pin is inclined at a predetermined angle with respect to a plane perpendicular to the axis of the through hole, and at least a spring member is interposed between the flange of each conductive toe pin and the flange of the conductive head pin. The conductive head pins are urged toward the other surface of the housing, and the conductive head pins are contacted with the conductive head pins in an inclined state. Causes the press-contact type connector, characterized in that the with these contact with conductive Topin and the conductive head pin so as to conduction path. 2. A plurality of through holes provided side by side in a housing, a hollow conductive toe pin inserted into each through hole and exposed from one surface of the housing, and another surface of the housing fitted into each conductive toe pin. A press-fit connector including a conductive head pin slidably protruding from said conductive toe pin and a flange protruding outward from an outer peripheral surface of said conductive toe pin and an outer peripheral surface of said conductive head pin to face a flange of each of said conductive toe pins. A step is formed on the surface of the conductive head pin opposite to the flange, and a spring member is interposed between the flange of each conductive toe pin and the flange of the conductive head pin to force at least the conductive head pin toward the other surface of the housing. The conductive head pin is brought into contact with each of the conductive toe pins in an inclined state, and Insulation displacement connector which is characterized in that so as to the emissions and the conductive head pin in a conductive pathway. 3. The method according to claim 1, wherein the electrodes are opposed to each other.
A connection structure for a press-connecting connector, wherein the connection is made via the press-connecting connector described above.