JPH0142645Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a fixing pin for fixing one member to another member.

[Conventional technology]

Japanese Utility Model Application No. 51-83793 discloses a fixture for mounting a connector on a printed circuit board. The fixture has a pair of elastic arms having locking shoulders at their free ends and a wide head-shaped portion interconnecting the other ends of the elastic arms. The housing of the connector is formed with a wide and narrow two-stage through hole, the head portion is disposed in the wide hole, and an elastic arm is inserted through the narrow hole portion with its free end extending outward. It extends in the direction. Although the fixture is configured to capture the connector and printed circuit board between its wide head and locking shoulder, no means are provided for securing the fixture to the connector. For this reason, for example, when the terminals and fixtures inside the connector are immersed in a solder bath during the soldering process of soldering them to the printed circuit board, the reaction force from the molten solder with high surface tension is applied to the locking shoulders and the printed circuit board. There was a problem in that the fixing tool became unlatched, and the fixing tool rose upward in the through hole due to the solder pressure, and could no longer function as a fixing tool.

[Summary of the idea]

This invention was made based on the above circumstances,
It is an object of the present invention to provide a fixture that can securely, easily, and quickly fix a member such as a connector to another member, such as a printed circuit board, and that can also be securely fixed within the connector. .

[Example of idea]

An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a fixture 1 according to the present invention. Although two fixtures with slightly different shapes are shown in the figure, they have the same configuration and will be described using the same reference numerals.

The fixture 1 consists of a base 5 and a pair of elastic legs 7 extending downward from the base 5. Each leg 7 has a serrated locking projection 6 on its outer surface.

The base 5 has a cavity 3 and a pair of arms 8 facing each other with the cavity 3 in between.

The upper ends of both arms 8 are interconnected by a chevron-shaped head 2. Each arm 8 has an external projection 4 on its outer surface.

The connector 10 has a through hole 41 that receives the fixture 1.
has. As shown in FIG. 4, the through hole 41 consists of a wide first hole 42 for receiving the base 5 and a narrow second hole 43 through which the leg 7 passes.

FIG. 2 shows another embodiment of the fixture, and this fixture 11 differs from the fixture 1 in that the base 15 integrally has a body 16, and the base 11 is arranged horizontally. 15 and the body 16, the legs 7 extend perpendicularly from the body 16. With such an arrangement, the fixture 11 can be applied to a connector 20 having a horizontally extending insertion hole 51.

Although FIG. 3 shows yet another embodiment, the leg portion 7 is omitted because it is the same as in FIG. 1. In the fixture 21 shown in the figure, a base 25 has a pair of arms 28 with a space 23 in between, and the upper ends of both arms 28 are connected to each other by a hexagonal head 22. An inner protrusion 27 that projects into the cavity 23 is provided on the inner surface of each arm 28 .
The connecting portion 26 between the head 22 and the arm portion 28 is thin and detachable. Thus, by striking the top surface of the head 22 with a hammer, for example, the head 22 can be separated from the arm 28 and removed from the cavity 23.
The connecting portion 26 is recessed inward so that the end of the connecting portion 26 engages with the inner protrusion 27 to press each arm portion 28 outward.

The fixture 31 has a wedge-shaped head 3 connected to one end of a pair of arms 38 and extending above the cavity 23.
It has 2. The connecting portion 36 of the head 32 is formed to be thin and detachable, and is separated from the arm portion 38 by driving the head 32 into the cavity 33 in the same manner as described above. The distance between the vertical surfaces 39 of the head 32 is larger than the distance between the opposing inner protrusions 37 of the arms 38. Therefore, when the head 32 is driven in, the vertical surface 39 is aligned with the inner protrusions 37. When engaged, both arm portions 38 are displaced outward.

Next, an example of the use of the above fixture will be explained with reference to FIG. 4.

As shown in FIG.
protrude outward.

The inner diameter of the through hole 11 of the connector 10 is approximately equal to the dimension between the outer protrusions 4 of the fixture 1.

Next, as shown in FIG.
Push it into. In this case, the inner diameter of the mounting hole 12a is formed slightly smaller than the outer diameter of the leg 7, and the fixture 1 and the printed circuit board 12 are fixed by the pushing force of the leg 7 that tends to expand outward. . In addition, in the above state, since the fixing tool 1 is inserted by hand, the connector 1
A gap G is formed between the shoulder portion 44 of the through hole 11 of No. 0 and the lower surface of the base portion 5 of the fixture 1.
As shown in Figure C, by hitting the depression head 2 with a tool such as a hammer to cause it to collapse, the gap G disappears due to the downward component of force, and the arm part 2 as shown in Figure D 8 is pushed outward and the external protrusions 4 provided on both sides bite into the inner wall surface of the through hole 11.

In this way, the fixing tool 1 and the connector 10 are reliably fixed, and the connector 10 and the printed circuit board 12 are connected by the engagement between the locking protrusion 6 of the leg part 7 of the fixing tool 1 and the mounting hole 12a of the printed circuit board 12. Reliable fixation is possible.

In the case of the fixture shown in FIG. 2, the function is similar to that described above except that the external protrusion 4 of the arm portion 8 bites into the upper and lower inner wall surfaces of the insertion hole 11 of the connector 10.
Furthermore, the fixtures 21 and 23 shown in FIGS. 3A and 3B are
As described above, the heads 22, 32 are struck with a tool such as a hammer to separate them from the arms 28, 38, and the empty spaces 23, 3 are separated from the arms 28, 38.
By driving along the inner wall surface of arm part 2
8, 38 are pushed outward and the external protrusion 2 of the arm is expanded.
4 and 34 bite into the inner wall surface of the through hole 11 of the connector 10.

In the above embodiment, the connector 10 was explained as the fixture 1 for fixing it to the printed circuit board 12, but of course the use is not limited to this.
It can be widely used as a fixing device for members.

[Effect of idea]

Since the present invention is configured as described above, one member and another member can be fixed simply, quickly, and reliably.

Particularly when used to temporarily fix a connector to a printed circuit board, the fixture is integrally fixed to the connector by its external protrusion, which reliably prevents the fixture from lifting off from the connector during the soldering process. As a result, the connector can be securely fixed onto the printed circuit board.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing a part of a fixture and a connector showing one embodiment of the present invention; FIGS. 2A and B are perspective views similar to the above showing another embodiment of the present invention; FIG.
Figures A and B are perspective views similar to those described above showing still other embodiments of the present invention, and Figures 4A to 4D are sectional views for explaining how to use the fixture in the above embodiment. 1, 11, 21, 31...Fixing tool, 2, 22,
32... Head, 3, 23, 33... Blank space, 4, 2
4, 34... External process, 5, 25, 35... Base,
6... Locking protrusion, 7... Leg portion.

Claims (1)

[Scope of utility model registration request] In order to lock one member to another member, it is fixed in an opening formed in the former member, and the base part is accommodated in the opening and the other member projects outwardly from the opening. a pair of opposing arms in which the base defines a cavity; and a head extending from a free end of at least one of the arms above the cavity. and at least one of the arm portions is provided with a locking protrusion on a side surface opposite to the side surface facing the void space, and the head portion is pressed and deformed or moved toward the void space, so that the arm portion The fixture is characterized in that the locking projection is moved toward the inner wall surface of the opening and the locking protrusion bites into the inner wall surface to be integrally fixed to the inner wall surface.