JP2540067Y2 - Mounting jig for press-fit type power supply terminal - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a mounting jig for mounting a power supply terminal to be press-fitted into a through hole of a printed circuit board.

B. Prior Art For example, a printed circuit board generally called a motherboard for industrial equipment on which a large number of electrical components such as connectors are mounted is widely known. In FIG. 5, a number of connectors 5 are mounted on a printed circuit board or motherboard 51.
One example of a conventional motherboard assembly on which several power supply terminals 40 are mounted, such as 3, 54, 55, etc., is shown. The conventional power supply terminal 40 will be described with reference to FIG.
Has a function of supplying power to the printed circuit board 51 by screwing the power supply terminal lug 66 of the power supply wire with the male screw 65 and the female screw 42 of the power supply terminal (FIG. 4). I can understand that there is. Although various types of power supply terminals are commercially available, press-fit type power supply terminals shown in FIG. 4 are also known and will be briefly described below.

The press-fit type six-pole power supply terminal 40 shown in FIG. 4 is provided with six press-fit legs 41 facing each other, and press-fits into corresponding through holes 47 of the printed circuit board to supply power. Attach the terminals to the printed circuit board. A female screw 42 to be screwed with a male screw 65 for attaching to the power terminal lug 66 shown in FIG. Male thread for mounting
When the screw 65 is screwed into the female screw 42 of the power supply terminal 40 and tightened, the escape hole 48 (see FIGS. 4 and 6) of the male screw is provided on the printed circuit board so that the tip of the male screw does not collide with the surface of the printed circuit board. Is provided at the center of the mounting position of the power supply terminal.

Generally, the pitch of the through hole of the circuit board is, for example, JIS standard or a commonly used pitch (for example, 2.
54 mm). The connection legs (including press-fit type and soldering type) of many electrical components including connectors are made of pitches that match the conventional pitches of printed circuit boards. The spacing is also designed as a multiple of the conventional pitch (or JIS standard).

Among the electrical components for press-fitting to be mounted on a printed circuit board, a method of mounting the connector on a printed circuit board and a jig thereof will be briefly described below, taking a connector as an example.

Many of the press-fit connectors mounted on the motherboard 51 shown in FIG. 5 have multi-pole connectors, such as 30 poles or 100 poles, which are juxtaposed and mounted, and the pitch of the connectors is generally used. Is made to a certain size (for example, a 2.54-mm pitch or a JIS connector pitch), the connector mounting jig must be made of a hard synthetic resin (for example, Delrin) slightly larger in area than the printed circuit board. ) Inside a printed circuit board (eg, about
A honeycomb-like connector mounting jig is used, in which a number of fine holes (escape holes at the tip of the press-fitting leg) are regularly and vertically drilled with the same pitch as the pitch of the through hole of 35 cm x 40 cm). I have. Place such a connector mounting jig, also called the cradle, on the base of the press machine,
Place the printed circuit board on this mounting jig, align the through hole for mounting the connector on the printed circuit board with the hole of this mounting jig, and then insert the tip of the press-fitting leg of the press-fitting connector. After being inserted into the through holes, the contacts of the connector are strongly pressed by a press machine, and the multi-pole connector is mounted on the printed circuit board. From the above, these pores prevent the tip of the press-fitting leg (which may be considerably long for wire wrapping) from protruding further from the back surface of the printed circuit board during the press-fitting operation of the connector. It can be seen that it functions as a relief hole at the tip of the press-fitting leg to allow it.

On the other hand, unlike the case of the connector, the pitch of the through hole 47 provided on the printed circuit board for mounting the press-fit type power supply terminal 40 generally has a different dimension from the above-mentioned conventional pitch. Therefore, the press-fit leg of the power supply terminal is also made of a pitch different from the conventional pitch. Also, while the size of the printed circuit board and the mounting layout of electronic components are designed to have a certain pattern for mass production, the mounting layout of the power supply terminals is
It often has various patterns, and the work of mounting the power supply terminals tends to be small and versatile. Therefore, the above-described honeycomb-shaped connector mounting jig cannot be used for mounting the power supply terminal. Furthermore, a large number of power supply terminals mounted on the printed circuit board are provided around the periphery of the board,
Alternatively, some are provided concentrated in the center of the substrate, and the mounting positions are different, and the distance between the power supply terminals is not a multiple of the above-mentioned conventional pitch. Therefore, the work of press-fitting the power supply terminals is manually performed one by one, and a dedicated jig for mounting the power supply terminals is used.

Referring to FIG. 6, a power supply terminal 40 is connected to a printed circuit board,
That is, a method of press-fitting the mother board 51 and the mounting jig 67 thereof will be described below. 6, the power supply terminal lug 66 for supplying power to the power supply terminal 40 and a female screw 42 for mounting provided on the power supply terminal for fastening the terminal lug to the power supply terminal are screwed. A male screw 65 is shown, and a stud is provided on the upper surface of the power supply terminal mounting jig 67.
It is shown that 68 is fixed and a relief hole 62 at the tip of the press-fit leg 41 of the power supply terminal 40 is provided.

The conventional method for mounting the power supply terminal 40 on the printed circuit board 51 will be described. First, the escape hole 48 of the male screw provided on the printed circuit board 51 is fitted into the stud 68 of the mounting jig 67.
Next, the through hole 47 of the printed circuit board 51 and the escape hole 62 at the tip of the press-fitting leg provided on the mounting jig 67 are aligned using a pin-shaped aligning jig, and the press-fitting leg of the power supply terminal is aligned. After manually inserting 41 into the through hole 47 of the printed circuit board 51, the press-fit leg 41 is pressed by pressing the shoulder 43 (FIG. 4) of the power supply terminal 40 with a press machine.
Into the through hole 47. Thereafter, in order to mount another power supply terminal 40, the printed board is moved to make another male screw escape hole 48 at the mounting position of the power supply terminal on the printed circuit board 51 a stud 68 of the mounting jig 67. After fitting, the through hole 47 of the printed circuit board 51 and the escape hole 62 at the tip of the press-fitting leg provided on the mounting jig 67 are made to coincide with each other using a needle-shaped jig in the same manner as described above. . Subsequent operations are the same as those described above. Thus, the same operation is repeated for each power supply terminal by the number of mounting positions of the power supply terminal on the printed circuit board.

The step of mounting the power supply terminal to the motherboard may be performed before mounting the connector, or may be performed after mounting the connector.

C. Problems to be Solved by the Invention As described above, the work of mounting the press-fit type power supply terminal on the printed circuit board has to rely on manual work, and is performed by printing on the power supply terminal mounting jig described above. The task of aligning circuit boards is not easy. In particular, for the mounting position of the power supply terminal provided near the center of the printed circuit board,
Since the mounting jig 67 cannot be seen from the upper surface of the printed circuit board 51, the work of matching the mounting jig to the mounting position has to waste a considerable amount of time, which has a problem in work efficiency.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a power supply terminal mounting jig which can be easily arranged on a power supply terminal mounting portion of a printed circuit board.

D. Means for Solving the Problems The conventional method is to match the through hole for press-fitting the power supply terminal on the printed circuit board with the relief hole at the tip of the press-fit terminal press-fitting leg on the surface of the jig for mounting the power supply terminal. In contrast to searching for an appropriate position while moving the printed circuit board back and forth and left and right using a pin-shaped alignment jig, the power supply terminal mounting jig according to the present invention has a power supply terminal lug mounting male screw on the printed circuit board. After inserting a stud with the elastic O-ring of the power supply terminal mounting jig into the relief hole, and temporarily temporarily fixing the printed board and the mounting jig with the O-ring, the press-fitting leg of the power supply terminal on the substrate In order to match the through hole with the terminal tip relief hole on the mounting jig, rotate the power supply terminal mounting jig appropriately around the studs and adjust the proper position using a pin-shaped alignment jig. Characteristic in searching Furthermore,
In another embodiment of the present invention, the provision of the positioning rod simplifies the work of aligning the through hole of the printed circuit board with the escape hole of the tip end of the press-fitting leg, and furthermore, a plurality of power feeds. The terminal can be press-fitted in a single press process.

E. Embodiment FIG. 1 is a perspective view of a mounting jig 10 of the present invention used for press-fitting a conventional power supply terminal (of the same type as FIG. 4) to a printed circuit board, and FIG. FIG. 2 is a cross-sectional view of the mounting jig of FIG. 1 taken along the line AA. Second
In the drawing, the escape hole 48 of the male screw for attaching the printed circuit board 51 and the power terminal lug is indicated by a two-dot broken line. As shown in FIG. 1, a jig for mounting a power supply terminal
The base body 10 has a hexahedral shape made of a hard synthetic resin, and a stud 11 is fixed perpendicularly to the upper surface thereof.

As shown in FIG. 1, the stud 11 has a flange 14 provided integrally therewith, and the upper part of the flange is fitted with the inner diameter (FIG. 4) of the female screw 42 of the power supply terminal. It has a diameter and the head is made in a rounded shape. An elastic O-ring 12 having elasticity such as rubber is fitted between the lower surface of the flange 14 and the upper surface of the base 19, and the outer diameter of the flange 14 is larger than the outer diameter of the elastic O-ring 12. It is made small and holds the O-ring 12. The outer diameter of the elastic O-ring 12 has such a size as to elastically engage with a male screw relief hole 48 (see FIGS. 4 and 6) provided on the printed circuit board. On the upper surface of the base 19, six relief holes 13 for receiving the distal end portions of the press-fitting legs 41 of the power supply terminals 40 are provided.

As can be seen from the cross-sectional view of FIG. 2, the stud 11 is inserted into the hole 18 so that the O-ring 12 fitted from below is retained by the flange 14, and then is attached to the base 19 by the set screw 17. It is fixed.

The guide opening 15 provided on the side surface of the base 19 is inserted into a positioning rod 32 (described later) shown in FIG. The magnetic body 16 provided on the bottom of the base 19 has a function of fixing the power supply terminal mounting jig to a steel base of a press machine (not shown) by its magnetic force.

Next, a method of using the power supply terminal mounting jig 10 of the present invention will be described. As can be seen from FIGS. 2 and 3, the elastic O-ring 12 of the mounting jig 10 is fitted into the escape hole 48 of the printed circuit board 51, and the through hole 47 of the printed circuit board is formed by using a pin-shaped jig.
And the relief hole 13 of the press-fitting leg. Elastic O-ring
With the elasticity of 12, the mounting jig 10 is temporarily fixed to the printed circuit board in this state. Next, as shown in FIG. 3, the press-fit leg 41 of the power supply terminal 40 is inserted into the through hole 47, and the mounting jig 10 is placed on a base (not shown) of the press machine. The machine presses the shoulder 43 of the power supply terminal to complete the mounting operation.

In the above example, one power supply terminal is individually mounted. For example, as shown in FIG. 5, a plurality of power supply terminals (for example, 40 ', 40 ", 40) are arranged in a line. In the case where the power supply terminals are arranged side by side, a plurality of power supply terminals can be mounted in one press-fitting mounting process.
Can be temporarily fixed to the circuit board by the elasticity of the elastic O-ring. Therefore, a plurality of power supply terminals are temporarily fixed to the board, and then these power supply terminals are strongly pressed at once by a press machine. , Can be installed. Further, in the method of mounting a plurality of power supply terminals in one press step, as shown in FIG. 3, by using positioning rods 32 provided in parallel with the surface of the substrate, the mounting work can be made more efficient. Can be measured. That is, the guide holes 15 of the mounting jig 10 are fitted into the positioning rods 32, and the distance between the jigs 10 is determined according to the mounting position of the substrate. If the jig is fixed to the base of the press machine, a pin-shaped jig is used to make the through hole 47 of the printed circuit board and the escape hole of the press-fit leg.
It is not necessary to align the mounting jig 10 with the through-hole 47 and the relief hole 13 easily.In addition, if the mounting jig 10 is once positioned on the base of the press machine by the positioning rod 32,
There is no need to individually adjust the mounting jig for the same type of printed circuit board that follows.

F. Effects of the Invention As described above, the mounting jig for the press-fit power supply terminal of the present invention can extremely efficiently perform the mounting operation.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the mounting jig of the present invention, FIG. 2 is a cross-sectional view of the embodiment of FIG. 1, and FIG. 3 is the present invention when mounting a press-fit type power supply terminal on a printed circuit board. 4A and 4B for explaining how to use the mounting jig of the embodiment of FIG.
FIG. 5 is a perspective view showing a conventional press-fit type power supply terminal, FIG. 5 is a perspective view of a conventional printed circuit board on which a press-fit type power supply terminal and a multi-pole connector are mounted, and FIG. It is a figure for explaining the conventional mounting jig used for press fitting. 10 ... Power supply terminal mounting jig, 11 ... Stud, 12 ... Elastic O-ring, 13, 62 ... ... Relief hole at the tip of press-fitting leg, 15 ...
Guide opening, 16: Magnetic material, 40: Power supply terminal, 41: Press-fit leg, 42: Female screw for attaching power terminal lug, 47: Through hole in printed circuit board, 48: Escape hole for male screw, 51 ... printed circuit board, 53, 54, 55 ... connector, 65 ... male screw for attaching power terminal lug, 66 ... power terminal lug, 67 ...
… Conventional mounting jig.

Claims (1)

(57) [Scope of request for utility model registration] A power supply terminal having a plurality of press-fitting legs for press-fitting into a through hole of a printed circuit board and a female screw screwed with a male screw for attaching a power terminal lug is provided in an escape hole of the male screw, and A press-fitting jig for press-fitting the printed circuit board having the through-hole, comprising: a base portion having an upper surface, a side surface, and a bottom surface; and a relief hole formed at a top surface of the base portion, the tip portion of the press-fit leg portion. A stud fixed vertically to the upper surface of the base, and an elastic O-ring having an elasticity and an outer diameter elastically engaging with the escape hole of the male screw, the base of the stud. A mounting jig for a press-fit type power supply terminal, wherein the mounting jig is mounted on a terminal.