JP2002117926A - Spring pin connector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a surface mountable spring pin connector capable of shortening a manufacturing process and enhancing the mounting density. SOLUTION: This spring pin connector is provided with an insulated body 10 formed with a plurality of small diameter holes 11 opened in one face and a plurality of large diameter holes 12 communicated with the small diameter holes and opened in another face parallel to the one face, conductive pins 2 penetrating the small diameter holes and arranged movably in an axial direction, large diameter parts 3 with diameters smaller than diameters of the large diameter holes integrally formed on end parts on large diameter hole sides of the conductive pins, holes formed on end faces of the large diameter parts, compression springs 4 engaged to one ends of the holes formed on the large diameter parts and applying deflecting force to the conductive pins, locking conductors 5A having pairs of legs bent in U-shapes compressively deforming and locking the compression springs pressed in grooves formed axially along the large diameter holes by the pairs of legs, and outward facing projecting parts 53A provided in substantially center parts of terminal parts 56A which are faces of the locking conductors coupling the pairs of legs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a spring pin connector mounted on a surface of a printed circuit board.

[0002]

2. Description of the Related Art (Prior Art 1) FIG. 3 is a cross-sectional view of a spring pin connector of Conventional Example 1, and FIG. 4 is a configuration diagram in which the spring pin connector is mounted between printed wiring boards. FIG.
2 shows a perspective view in which five spring pin connectors are integrated with an insulating covering portion. Conventional Example 1 will be described with reference to FIGS.

As shown in FIG. 3, a spring pin connector 1 has a compression spring made of a conductor material in a cylindrical conductor pin 30 which is drawn into one end portion so as to have a smaller diameter than the other portion to form a mounting base 31. 4, the conductive pin 2 having a conical tip is inserted into the cylindrical conductor pin, and is resiliently supported by the compression spring so that the conical tip is formed at the other end of the cylindrical conductor pin. It is designed to be able to move forward and backward while projecting from the opening. The diameter of the base of the conductive pin 2 is made larger than that of the middle body, and the base is engaged with an inward flange 32 formed at the opening edge of the cylindrical conductor pin and is prevented from being pulled out. One end of the compression spring is engaged with a step surface formed at the boundary between the small-diameter mounting base and the middle body in the cylindrical conductor pin.

[0004] As shown in FIG. 4, the spring pin connector 1 stands up by inserting the mounting base 31 of the cylindrical conductor pin of the spring pin connector into a hole provided on one printed wiring board 40, and soldering the conductive pattern 45 to the conductive pattern 45. After fixing
This printed wiring board is screwed (screw insertion hole 47, screw hole 61, screw 62) to the lower surface side of the frame-shaped chassis 60. Also, by overlapping the wiring terminals 42 of the other printed wiring board 41 so as to face inward and contacting the tip of the conductive pin,
The two printed wiring boards are connected by a spring pin connector.

[0005] As shown in FIG. 5, a plurality of spring pin connectors are covered with an insulating cover portion 35 so that the conductive pins 2 and the mounting base 31 are protruded and integrated to form a plurality of conductive members of two printed wiring boards. Connect between the pattern and the wiring terminals. With the above configuration, even when there is a dimensional error due to deflection or the like in the wiring interval between the printed wiring boards, good electrical connection can be performed without causing a contact failure, and assembly and disassembly can be easily performed. FIG. 6 is a sectional view of a spring pin connector of Conventional Example 2 taken along the line 10D-D, FIG. 7 is a bottom view of the insulating body, and FIG.
9 is a perspective view of a locking conductor, FIG. 9 is a perspective view of a thin plate spring, and FIG. 10 is a front view of a spring pin connector.

Conventional Example 2 will be described with reference to FIGS.
As shown in FIG. 6, the spring pin connector 1 has a small-diameter hole 11 formed on one surface of an insulating body 10 and a large-diameter hole 12 formed in communication with the small-diameter hole. The large diameter hole is opened to the other surface of the insulating body. The conductive pin 2 is inserted through the small diameter hole 11. One end of the conductive pin has a large-diameter portion 3 which is housed in a large-diameter hole formed in the insulating body. The large-diameter hole has four grooves 13 on the side of the circular hole as shown in FIG.

As shown in FIG. 8, the locking conductor 5 is provided with a pair of legs 51 formed by bending a conductive plate into a U-shape. Close the opening surface. A protrusion 55 is formed on the side of the pair of legs, and the protrusion cuts into the side edge of the groove to prevent the locking conductor from coming off. Further, a tongue piece 52 protrudes inward substantially at the center of the surface of the engagement conductor 5 connecting the pair of legs, and a terminal formed integrally and extended.
53 will be provided. As shown in FIG. 9, the thin plate spring 6 has a pair of legs 61 formed by bending in a U-shape similarly to the locking conductor. The leg forms a fold 62 so as to open wide in the middle.

A thin leaf spring 6 is inserted between a pair of legs of the locking conductor. By inserting this thin leaf spring between the legs of the locking conductor, the leg of the thin leaf spring is mounted in a state where the fold portion is expanded inward as shown in FIG. The tongue provided on the locking conductor projects into the large diameter portion through a hole 63 formed in the surface between the legs of the thin plate spring 6. The tongue is engaged with the end of the compression spring 4 to hold the end of the compression spring at the center of the large diameter hole.

FIG. 10 shows the overall shape of the spring pin connector. By providing the above configuration, the conductive pin and the locking conductor mutually conduct through the thin plate spring, so that a piano wire having a higher spring pressure than phosphor bronze can be used as a compression spring. Since a large spring pressure can be applied, the overall shape can be reduced. (Refer to JP-A-8-88040)

[0010]

(1) In the conventional example 1, when a spring pin connector is mounted, a hole is formed in a printed wiring board, and a mounting base is fitted into the hole and fixed by soldering. I do. Therefore, a process of forming a hole in the printed wiring board, a process of providing a mounting base on the cylindrical conductive pin to fit into the hole, and
Inward flange processing for preventing the large diameter portion of the conductive pin from coming off is required, and the processing steps are complicated.

Further, as shown in FIG. 4, a separate step of integrating a plurality of individually assembled spring pin connectors with an insulating coating is required. (2) In Conventional Example 2, the locking conductor and the thin leaf spring can be produced by press working without requiring high precision, and the spring having a plurality of conductive pins by press-fitting the locking conductor into the insulating body. The pin connector can be assembled and the process can be shortened.However, it is not possible to increase the mounting density by inserting the terminal formed integrally from the locking conductor into the hole of the printed wiring board and soldering it. Can not.

Further, in the above-mentioned prior arts 1 and 2, there is no structure for mounting the spring pin connector on the surface of the printed wiring board. An object of the present invention is to provide a spring pin connector which can increase the mounting density by changing a part of the configuration of the spring pin connector of Conventional Example 2 and enables surface mounting.

[0013]

In order to solve the above-mentioned problems, a first aspect of the present invention is to provide a plurality of small-diameter holes which are opened on one surface and communicate with the small-diameter holes so as to be parallel to the one surface. An insulating body formed with a plurality of large-diameter holes opened on the other surface; a conductive pin penetrating the small-diameter hole and movably arranged in the axial direction; and the large-diameter hole of the conductive pin. A large-diameter portion having a diameter smaller than the diameter of the large-diameter hole, and a hole formed on an end surface of the large-diameter portion,
One end engages the hole formed in the large diameter portion, and has a compression spring that applies a biasing force to the conductive pin, and a pair of legs bent in a U-shape. A spring pin connector having a locking conductor press-fit into a groove formed in an axial direction along a large-diameter hole and locking the compression spring by compressively deforming the surface, the surface connecting the pair of legs of the locking conductor. Is a terminal portion, and an outwardly protruding portion is provided substantially at the center.

According to a second aspect of the present invention, in the spring pin connector of the first aspect, the spring pin connector is interposed between the locking conductor and the compression spring, and is disposed along the U-shaped leg of the locking conductor. A thin plate spring for electrically connecting the locking conductor and the conductive pin is provided.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention provides a spring pin connector which can increase the mounting density by changing the configuration of the locking conductor of the spring pin connector described in the prior art example 2 and enables surface mounting. I do. . Conventional example 2
In the spring pin connector shown in (1), terminals are formed extending from the side of the surface connecting the legs of the locking conductor, and these terminals are inserted into the holes of the printed wiring board and soldered. In the spring pin connector, a convex portion is provided by pressing or the like using a surface of the locking conductor to which the leg is coupled as a terminal portion, and the terminal portion provided with the convex portion is soldered to a printed wiring board.

1 and 2 show one embodiment of the present invention. 1 and 2, portions corresponding to those in FIGS. 6 to 10 are denoted by the same reference numerals. FIG. 1 shows a sectional view and a bottom view of a spring pin connector of the present invention. 1 (a) is a sectional view taken along line AA of FIG. 1 (c), FIG. 1 (b) is a sectional view taken along line BB of FIG. 1 (c), and FIG. Figure viewed from the direction)
It is. The insulating body, conductive pins, compression coil springs, and thin plate springs of the present invention are the same as those of the conventional example 2 shown in FIGS.

FIG. 2 shows the configuration of the locking conductor 5A of the present invention.
2A is a front view, and FIG. 2B is a cross-sectional view taken along the line CC of FIG. 2A. As shown in FIG. 2, the locking conductor 5A has a pair of legs 51A formed by bending a conductive plate into a U-shape and a terminal portion 56A connecting the legs, and press-fits the pair of legs into the groove 13. A protrusion 55A is formed on the side of the leg, and the protrusion cuts into the side edge of the groove to prevent the locking conductor from coming off. In addition, a convex portion 53A protruding outward by a press or the like is provided on the terminal portion of the locking conductor.

As shown in FIGS. 1 (a) and 1 (b), the spring pin connector 1 is vertically arranged on the conductive pattern 45 of the printed wiring board 44, and is soldered and fixed to the terminal portion 56A. In soldering, by forming a gap of a constant thickness between the soldering surface and the conductive pattern by the convex portion provided on the terminal portion, a large amount of solder is interposed in this gap and the bonding area between the terminal portion and the solder is increased. The bonding strength can be extremely increased. In addition, the convex portion can be easily processed by a press or the like without requiring a special member in the terminal portion. The convex portion is not limited to a hemispherical shape, and may have any shape such as a conical shape, a pyramid shape, a prism shape, and the like.

With such a configuration, a spring pin connector having a height higher than the bottom area can be mounted on the surface of the printed wiring board.

[0020]

Since the present invention is configured as described above, the following effects can be obtained. (1) The dimensions of the individual components constituting the spring pin connector do not require such a high degree of precision, and can be produced by press working capable of producing in a high cycle, so that the component prices can be reduced. (2) Since the terminal portion (soldering portion) of the spring pin connector to the printed wiring board can be accommodated below the connector in the axial direction, the mounting area can be reduced, and furthermore, flux or solder flows into the connector contact portion. Absent. (3) As in the conventional example 2, a step of incorporating other components directly into the insulating body can be taken, and the steps can be shortened. (4) A convex portion is formed integrally with the terminal portion of the locking conductor, which is a component for fixing all components at predetermined positions in the insulating body. It can be easily processed. Further, the terminal portion and the printed wiring board can be firmly fixed by the convex portion.

[Brief description of the drawings]

FIG. 1 is a sectional view and a bottom view of a spring pin connector of the present invention.

FIGS. 2A and 2B are a front view and a cross-sectional view illustrating a configuration of a locking conductor of the present invention.

FIG. 3 is a cross-sectional view of a spring pin connector of Conventional Example 1.

FIG. 4 is a view showing a mounting state of a printed wiring board of a spring pin connector of Conventional Example 1.

FIG. 5 is a perspective view showing an example in which a plurality of spring pin connectors of Conventional Example 1 are integrated with an insulating coating portion.

FIG. 6 is a sectional view of a spring pin connector of Conventional Example 2.

FIG. 7 is a bottom view of an insulating body of Conventional Example 2.

FIG. 8 is a perspective view of a locking conductor of Conventional Example 2.

FIG. 9 is a perspective view of a thin plate spring of Conventional Example 2.

FIG. 10 is a front view of a spring pin connector of Conventional Example 2.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Spring pin connector 2 Conductive pin 4 Compression spring 5, 5A Locking conductor 6 Thin spring 44 Printed wiring board 45 Conductive pattern 46 Solder part 53A Convex part 56A Terminal part

Claims (2)

[Claims] 1. An insulating body in which a plurality of small-diameter holes opened on one surface and a plurality of large-diameter holes communicated with the small-diameter hole and opened on the other surface parallel to the one surface are formed. And a conductive pin that penetrates the small-diameter hole and is disposed so as to be movable in the axial direction, and is integrally formed at an end of the conductive pin on the large-diameter hole side,
A large-diameter portion having a diameter smaller than the diameter of the large-diameter hole, a hole formed in an end face of the large-diameter portion, and one end engaged with the hole formed in the large-diameter portion, biasing the conductive pin A compression spring for applying a force, and a pair of legs bent in a U-shape. The pair of legs is press-fitted into a groove formed in the axial direction along the large-diameter hole. A spring pin connector, characterized in that a locking conductor that is compressed and deformed and locked, and a surface connecting the pair of legs of the locking conductor is a terminal portion, and an outwardly protruding portion is provided at a substantially central portion. 2. The spring pin connector according to claim 1, wherein said spring pin connector is interposed between said locking conductor and a compression spring, and is disposed along a U-shaped leg of said locking conductor. A spring pin connector comprising a thin plate spring for electrically connecting a conductor to the conductive pin.