JP3500560B2 - Board connection pin - Google Patents

Description

Description: BACKGROUND OF THE INVENTION [0001] 1. Field of the Invention [0002] The present invention relates to a structure of connection pins used for connection between patterns wired on a substrate. 2. Description of the Related Art In a wiring system such as a main distribution frame (MDF) connecting a telephone exchange and a subscriber line, wiring between a dedicated line network, wiring between trunk lines, and wiring between an exchange and a transmission device. By inserting and extracting connection pins into and out of a large number of pin insertion holes formed in a fixed array on a substrate called a matrix board, a pattern in the X direction separated and wired in the matrix board and a pattern in the Y direction In this case, a specific pin insertion / removal robot is used for inserting / removing the connection pin into / from the pin insertion hole. FIG. 4 is a view showing the structure of a conventional connection pin of this type. FIG. 4A is a side view, and FIG.
FIG. 4 is a sectional view taken along line -D. In the figure, reference numeral 10 denotes an entire connection pin. The connection pin 10 has a grip portion 11a having a shape suitable for being gripped by a gripper of a pin insertion / removal robot, and a shaft portion 11b inserted into a pin insertion hole of a matrix board. And a spring terminal 12 formed of a conductive metal plate is provided on the shaft portion 11b. [0004] Here, the holding portion 11a and the shaft portion 11b are integrally formed of a mold resin.
Are provided in such a manner that they are shifted in the direction of inserting and removing the connection pins 10 with respect to the pin insertion holes of the matrix board. As shown in FIG. 4B, each spring terminal 12 is embedded and fixed to the shaft portion 11b so that the center portion penetrates the shaft portion 11b in the diameter direction, and is exposed from the shaft portion 11b. The bent portion is bent along the outer peripheral surface of the shaft portion 11b to form an S-shape as a whole. The outer diameter of each spring terminal 12 is slightly larger than the diameter of the pin insertion hole of the matrix board. It is set large. [0005] In FIG.
Is a fixed point that is in contact with the outer peripheral surface of the shaft portion 11b, and 12b is a load point that is most floating away from the shaft portion 11b,
In this structure, two fixed points 12a and load points 12b are formed, and the distance between each fixed point 12a and load point 12b is represented as a spring length L2. 5 and 6 are views showing a manufacturing process of the connection pin 10, and FIG.
2 is a perspective view of a main part before bending, FIG.
FIG. 6 is a cross-sectional view of a main part of the spring terminal 12 during bending. In manufacturing the connection pin 10, first, a conductive metal plate is punched into a required shape by press working to form a flat spring terminal 12, and the holding portion 11 is formed with a mold resin.
5A and 5B, the central part of the flat spring terminal 12 is integrated with the shaft part 11b by insert molding. 1 shown in the figure
Reference numeral 3 denotes burrs formed on one surface of the spring terminal 12 when the conductive metal plate is punched into a required shape by press working. Thereafter, the portion exposed from the shaft portion 11a of the spring terminal 12 is bent by press bending, for example, in a counterclockwise direction as shown by an arrow to form the shape shown in FIG. After processing, Fig. 4 (B)
To the shape shown in (1). When the gripping claws of the pin insertion / extraction robot grip the gripping portion 11a and insert the shaft portion 11b into the pin insertion hole of the matrix board, the connection pin 10 having such a configuration is provided for each spring terminal 12 in the pin insertion hole. The pattern in the X direction and the pattern in the Y direction come into contact with each other, and the two patterns are connected to each other. Further, when the shaft portion 11b is pulled out from the pin insertion hole of the matrix board by the pin insertion / removal robot, the two patterns are cut off. However, according to the above-mentioned prior art, since the spring terminals 12 are formed so as to form an S-shape as a whole, one side of the spring terminals 12 is punched out by press working. As shown in FIG. 6, the burrs 13 formed on the matrix board always come out on the front side. Therefore, when the burrs 13 are inserted into and removed from the pin insertion holes of the matrix board, the burrs 13 are caught by the pin insertion holes and damage the spring terminals 12. There is a problem that occurs. As shown in FIG. 4 (B), when the distance between the fixed point 12a and the load point 12b is defined as a spring length L2, the spring terminal L2 is short. There is also a problem that the internal stress is easily concentrated, so that the spring terminal 12 is deformed by repeated insertion and removal, and lacks long-term reliability. Accordingly, an object of the present invention is to realize a matrix board connection pin that can solve such a problem. [0010] Therefore, the present invention provides a spring terminal formed of a metal plate attached to the outer periphery of a shaft, and the spring terminal together with the shaft is inserted into a pin insertion hole provided in a substrate. Inserting the spring terminal into contact with a plurality of patterns provided separately on the substrate to form a connection between the patterns by punching the connection terminal into a predetermined shape.
Embed one end of the removed spring terminal into the shaft and fix it.
A portion of the spring terminal exposed from the shaft portion is outside the shaft portion.
It is characterized by being bent to form a substantially C-shape along the peripheral surface . DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a matrix board connection pin according to the present invention will be described below with reference to the drawings. 1A and 1B are views showing a structure of an embodiment, FIG. 1A is a side view, and FIG. 1B is a cross-sectional view taken along line CC of FIG. In FIG. 1, reference numeral 1 denotes an entire connection pin, and the connection pin 1 is inserted into a grip portion 2a having a shape suitable for being gripped by a gripper of a pin insertion / removal robot, and into a pin insertion hole of a matrix board. A shaft terminal 2b, and a spring terminal 3 formed of a conductive metal plate on the shaft portion 2b.
Is provided. Here, the grip 2a and the shaft 2
“b” is integrally formed of a mold resin, and two spring terminals 3 are provided so as to be shifted in a direction of inserting and removing the connection pins 1 with respect to the matrix board. As shown in FIG. 1B, one end of each spring terminal 3 is embedded and fixed to the shaft portion 2b so as to penetrate the shaft portion 2b in the diameter direction, and is exposed from the shaft portion 2b. The bent portion is bent along the outer peripheral surface of the shaft portion 2b so as to form a substantially C-shape, and the outer diameter of each spring terminal 3 is slightly larger than the diameter of the pin insertion hole of the matrix board. It is set large. In FIG. 1B, reference numeral 3a denotes a fixed point of the spring terminal 3, and 3b denotes a load point at which the spring terminal 3 floats away from the shaft portion 2b. In this structure, the fixed point 3a and the load point 3
b is one, and the distance between the fixed point 3a and the load point 3b is represented as a spring length L1. Therefore, most of the portion of the spring terminal 3 exposed from the shaft portion 2b has the spring length L1, and this spring length L1 is sufficiently longer than the spring length L2 of the spring terminal 12 of the conventional connection pin 10. , Approximately 50% or more of the circumference. FIGS. 2 and 3 are views showing a manufacturing process of the connection pin 1 according to the present embodiment, and FIG.
(B) is a cross-sectional view of the main part before bending, and FIG. 3 is a cross-sectional view of the main part of the spring terminal 3 after bending. In manufacturing the connection pin 1, first, a conductive metal plate is punched into a required shape by press working to form a flat spring terminal 3, and when the gripping portion 2a and the shaft portion 2b are molded with a mold resin, a drawing is performed by insert molding. As shown in FIGS. 2A and 2B, one end of the flat spring terminal 3 is integrated with the shaft 2b. Reference numeral 4 shown in the figure denotes burrs formed on one surface of the spring terminal 3 when the conductive metal plate is punched into a required shape by press working. Thereafter, the portion of the spring terminal 3 exposed from the shaft portion 2a is bent as shown by an arrow by press bending so that the burr 4 is on the inner side, and FIG.
As shown in FIG.
The shape shown in (B) is obtained. The connecting pin 1 having such a configuration is configured such that the gripping claws of the pin insertion / removal robot grip the gripping portion 2a and the shaft portion 2b
Is inserted into the pin insertion hole of the matrix board, the pattern in the X direction and the pattern in the Y direction contact each other for each spring terminal 3 in the pin insertion hole, and both patterns are connected. When the portion 2b is pulled out from the pin insertion hole of the matrix board, the two patterns are cut off. In this insertion and removal, the burr 4 of the spring terminal 3 is on the inner surface side, so that the burr 4 does not get caught in the pin insertion hole and the insertion and removal is performed smoothly. Also, the spring terminal 3
Since most of the portion exposed from the shaft portion 2b has a long spring length L1 from the fixed point 3a to the load point 3b, the internal stress applied when the pin is inserted into and removed from the pin insertion hole is dispersed. Also, the deformation of the spring terminal 3 is suppressed. The connection pins 1 according to the present invention are used for wiring such as a main wiring board for connecting a telephone exchange to a subscriber line, wiring between a dedicated line network, wiring between trunk lines, and wiring between an exchange and a transmission device. In addition to the system, the present invention is applicable to a case where a connection between separated patterns is performed as a short terminal or the like for short-circuiting patterns formed on the front and back surfaces of a substrate. As described above, according to the present invention, a spring terminal formed of a metal plate is mounted on the outer periphery of a shaft, and the spring terminal is mounted together with the shaft in a pin insertion hole provided in a substrate. Inserting, in a board connection pin for connecting the pattern by contacting the spring terminal with a plurality of patterns provided separately on the substrate, when the spring terminal is punched into a predetermined shape by pressing, Since the spring terminal is attached to the shaft so that the burr generated on one side of the spring terminal is on the inside, even if the spring terminal is inserted into and removed from the insertion hole of the substrate together with the shaft, the burr is not inserted into the pin insertion hole. Is prevented from being caught on the terminal, whereby the insertion and removal are performed smoothly, so that the effect of preventing breakage of the spring terminal can be obtained. Further, the spring terminal is punched into a predetermined shape by a press, and one end is embedded in the shaft portion and fixed, and a portion of the spring terminal exposed from the shaft portion is formed along the outer peripheral surface of the shaft portion. Since the spring terminal is bent so as to form a substantially C-shape, the spring terminal has a long spring length from the fixed point to the load point, and this disperses the internal stress applied when inserting and removing the pin from the pin insertion hole. Even if insertion and removal are performed repeatedly, an effect that deformation of the spring terminal can be suppressed to a minimum can be obtained.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a configuration of an embodiment according to the present invention. FIG. 2 is a diagram showing a manufacturing process of the embodiment. FIG. 3 is a diagram showing a manufacturing process of the embodiment. FIG. 4 is a diagram showing a configuration of a conventional technique. FIG. 5 is a diagram showing a manufacturing process according to the related art. FIG. 6 is a diagram showing a manufacturing process according to a conventional technique. [Description of Signs] 1 Connection pin 2a Gripping portion 2b Shaft portion 3 Spring terminal 3a Fixed point 2b Load point 4 Burr

Continuation of the front page (72) Inventor Yasuhiro Ishikawa 10213-31 Tana, Sagamihara-shi, Kanagawa Inside Union Machinery Co., Ltd. (56) References JP-A-2-242543 (JP, A) JP-A 5-74545 (JP, A) JP-A-7-153522 (JP, A) JP-A-7-22572 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H04Q 1/00-1/16 H01R 13 / 00-13/08 H01R 13/15-13/35 H01R 19/00-19/44 H01R 21/00-21/22 H01R 23/00-23/72 H01R 43/027-43/28

Claims (1)

(57) [Claim 1] A spring terminal formed of a metal plate is attached to the outer periphery of a shaft, and the spring terminal is inserted together with the shaft into a pin insertion hole provided in a substrate. One end of a spring terminal punched into a predetermined shape is embedded in a shaft portion of a board connection pin for connecting a pattern by bringing a spring terminal into contact with a plurality of patterns provided separately on the substrate.
And the portion of the spring terminal exposed from the shaft portion
Is bent along the outer peripheral surface of the shaft so as to form a substantially C-shape.
A connection pin for a substrate, which is folded .