JPH062579U - securing bracket - Google Patents

Abstract

(57) [Summary] [Objective] To provide a fixing metal fitting having a low profile and sufficient elasticity and strength for fixing an electric component such as an electric connector to a circuit board. [Structure] The fixing member 10 includes a base portion 20 and an L-shaped portion 30. The L-shaped portion 30 has a substantially flat plate-shaped first portion 31 having a substantially T-shaped opening 34 and a pair of elastic legs 33 having an engaging protrusion 35 at a free end thereof.
And a second portion 32 having. The T-shaped opening 34 of the first portion 31 communicates with the gap between the elastic legs 33 of the second portion 32,
The elasticity of the elastic legs 33 is reinforced. As a result, it is possible to obtain a fixture having a large elasticity despite the low-profile structure.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fixture, particularly a fixture for attaching electrical parts such as an electrical connector to a circuit board.

[0002]

[Prior art]

 It is commonly used to attach electric components such as electric connectors to a circuit board, form a part of an electronic circuit together with an active device such as an IC, and mutually connect these electronic circuits and other circuits through an electric connector. There is. For example, if the electronic circuits formed on the two circuit boards are interconnected via an electrical connector, the maintenance serviceability of electronic equipment using such electronic circuits can be improved and high-density mounting is possible.

When soldering an electrical connector, particularly a contact of an electrical connector having a large number of contacts, to a conductive pad or a through hole of a circuit board, it is necessary to temporarily fix the insulating housing of the electrical connector to the circuit board. Even after soldering, it is preferable to securely fix the insulating housing to the circuit board to prevent the soldered connection from coming off due to excessive force acting on the contact terminals when the connector is inserted or removed. .

A conventional example of such a metal fitting for an electrical connector is disclosed in, for example, Japanese Utility Model Publication No. 1-42645. That is, it is generally a substantially flat plate formed by punching an elastic metal plate. It has a pair of legs that are spaced apart from one end of the base and extend in one direction. An engaging projection is formed on the outer surface of the leg near the free end thereof, and is configured to frictionally engage with the inner wall of the opening of the circuit board. If necessary, openings are formed in the base, and engaging projections are formed on both outer sides of the opening.These engaging projections are used when the head is pressed and press-fitted into the circuit board. It is configured to engage or bite into and be fixed.

[0005]

However, in such a conventional fixing metal fitting, since the pair of legs extend in one direction like a flat plate, desired elasticity cannot be obtained unless it has sufficient dimensions. There was a drawback. In other words, it has been difficult to obtain a small-sized, low-height structure fixing metal fitting suitable for recent small-sized, particularly low-height structure electric parts or electrical connectors.

Therefore, there has been a need to realize a fixture for a circuit board, which is suitable for an electric component having a small size and excellent elasticity and a small size and a low profile.

[0007]

[Means for solving the problem]

 In order to solve the problems of the conventional fixing metal fittings described above, according to the fixing metal fitting of the present invention, the base member has a first portion and a second portion bent in a substantially L shape from one end of the base portion, and The first part is formed with a substantially T-shaped opening, and the second part is formed with a pair of elastic legs. On both sides of the free end of the elastic leg, there are engaging projections or inclined surfaces that engage with the through holes of the circuit board.

[0008]

【Example】

 Hereinafter, a preferred embodiment of the fixing bracket of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1, FIG. 2 and FIG. 3 respectively show a front view, a side view and a top (planar) view of a preferred embodiment of the fixing metal fitting according to the present invention.

The fixing member 10 is composed of a base portion 20 and an L-shaped portion 30 bent from one end thereof into a substantially L shape. As shown by the broken line in FIG. 1, the fixing member 10 is connected to a carrier 40 that integrally connects and holds a plurality of fixing members 10 punched and formed at the upper end of the base 20 at the same time. I am trying to get an individual fixing bracket 10. Although FIG. 1 shows only one fixing bracket 10, a large number of fixing brackets 10 are simultaneously formed. A reference opening 42 is formed at a position corresponding to each fixing member 10 forming position of the carrier 40.

The fixing member 10 is preferably manufactured by punching and bending a brass plate having a plate thickness of about 0.6 mm by a press. If necessary, the nickel-plated substrate may be soldered.

The base 20 is approximately 5.5 mm in a substantially square shape in a preferred embodiment, and has a circular hole 21 formed in the center thereof and protruding in one direction. A thread 22 is formed on the inner surface of the round hole 21 as shown by a broken line. Similar to the conventional fixing metal fitting, a mounting screw (not shown) for mounting an electric component such as an electric connector together with a shield plate to a panel is inserted into the screw thread 22, and the electric housing, for example, both ends of the insulating housing of the electric connector. Fixed to. The reason for forming the round hole 21 in a protruding manner is to use a thin plate of, for example, about 0.6 mm and increase the number of screw threads 22 by setting the substantial plate thickness to, for example, about 1.4 mm. Is to reinforce.

At one (lower) end of the base portion 20, a relatively flat plate-shaped first portion 31 and a second portion 32 having a pair of elastic legs 33 are formed via a relatively narrowed transition portion 23. The letter-shaped portion 30 is formed. A substantially T-shaped opening 34 is formed in the first portion 31 and is continuous with the gap between the pair of elastic legs 33 of the second portion 32. As is apparent from FIG. 1, the pair of elastic legs 33 are expanded into a substantially octagonal shape, and a substantially triangular engagement protrusion 35 is formed on the outer side of the free end.

As shown by the broken line in FIG. 1, the elastic leg 33 is press-fitted and held in the through hole 51 of the circuit board 50. The size of the through hole 51 is selected to be smaller than the size (for example, 3.3 mm) between the outer ends of the engaging projection 35. Therefore, when the fixing metal fitting 10 is press-fitted into the through hole 51 of the circuit board 50, the outer surface of the tapered engagement projection 35 comes into contact with the inner wall of the through hole 51 so that the elastic legs 33 are inward, that is, the opposite sides of each other. Be bent to. The elastic leg 33 returns outward due to its elasticity when it goes over the top of the engaging projection 35, and the slope of the engaging projection 35 and the first portion 31 (or the insulating housing of the electrical connector using the fixing bracket 10 as described later). ) Hold the circuit board 50 between the bottoms of.

As can be seen from FIGS. 1 and 3, the gap between the T-shaped opening 34 of the first portion 31 of the L-shaped portion 30 and the elastic leg 33 of the second portion 32 is continuous, so Since the effective length of the leg 33 is sufficiently longer than the thickness of the circuit board 50, which is, for example, 1.8 mm, the elasticity of the elastic leg 33 can be made extremely large. Further, the circuit board 50 is pressed against the bottom surface of the first portion 31 by the engagement projections 35 of the elastic legs 33, so that the circuit board 50 can be stably and reliably fixed to the circuit board 50. After being inserted into the through hole 51 of the circuit board 50, the elastic leg 33 of the fixing member 10 may be fixed to the plated layer (not shown) of the through hole by soldering.

4A and 4B are a front view and a sectional view taken along line BB of an electric connector 60 using the fixing fitting 10 according to the present invention.

The electrical connector 60 includes an insulating housing 61, a shield member 62 disposed on the front surface of the insulating housing 61 and having a substantially D-shaped portion 63 protruding in the center, a plurality of contacts 64 inserted and held in the insulating housing 61, and an insulating member. It consists of a pair of fasteners 10 attached to both ends of the housing 61.

Each contact 64 of the electrical connector 60 has a connection portion arranged in the D-shaped portion 63 of the shell or shield member 62 and a solder connection portion protruding from the bottom surface of the insulating housing 61. The contact portions of the contacts 64 are arranged in upper, middle, and lower three rows on the mating surface, and the solder connection portions are similarly drawn out in three rows to form through holes densely arranged on the circuit board 50 (see FIG. 1). Inserted and connected.

The fixing bracket 10 pushes the base 20 into a recess 65 formed in the rear surface near both ends of the insulating housing 61, and inserts the round hole 21 into the aligned insulating housing 61 and the shield member 62 through the through holes 66 and 67. Screwed. In this particular embodiment, the circuit board 50 is sandwiched between the bottom surface of the insulating housing 61 and the engagement projections 35 on the outer surface of the resilient legs 33 which project outwardly from the bottom surface. This elastic leg 33 is preferably located on the central row of the solder connection of the contact 64.

The fixing metal fitting of the present invention has been described above in detail with reference to a preferred embodiment, but the present invention is not limited to such an embodiment, and various modifications can be made depending on the application without departing from the gist of the present invention. It will be understood that it is possible to modify and change the.

For example, when it is not preferable that the free ends of the elastic legs 33 project from the bottom surface of the circuit board 50, the elastic legs 33 are shortened and the engagement protrusions engage with the inner surface of the through hole of the circuit board. You may ask. Further, the engaging protrusions may be formed in two or more serrated shapes for each elastic leg. Further, a serrated engagement portion may be formed on both end edges of the base portion 20 so as to be bite into and fixed to the groove inner surface of the insulating housing of the electric connector.

[0022]

[Effect of device]

 As can be understood from the above description, the fixing metal fitting of the present invention can be manufactured by punching and bending a metal plate, so that it can be manufactured inexpensively and uniformly. In particular, the elastic legs are short, and the fixing bracket has a sufficiently large elasticity despite its low profile structure with a total length of about 12 mm, and sufficient strength can be obtained.

[Brief description of drawings]

FIG. 1 is a front view of a preferred embodiment of a fixing member according to the present invention attached to a through hole of a circuit board.

FIG. 2 is a side view of the fixing bracket of FIG.

FIG. 3 is a plan view of the fixture shown in FIG.

FIG. 4 is a front view and a cross-sectional view of an electric connector using the fixing bracket of FIG.

[Explanation of symbols]

 10 Fixing bracket 20 Base portion 30 L-shaped portion 31 First portion 32 Second portion 33 Elastic leg 34 T-shaped opening 35 Engaging projection 50 Circuit board 51 Through hole

Claims (1)

[Scope of utility model registration request] 1. A substantially flat plate-shaped base portion, and an L-shaped portion having a first portion and a second portion extending in a substantially L-shape from one end of the base portion, the first portion of the L-shaped portion. Is formed with a substantially T-shaped opening, a pair of elastic legs is formed in the second portion, and an engaging portion that engages with a through hole of a circuit board is formed at a free end of each elastic leg. Fixing metal that is characterized by being.