JP2596663Y2 - securing bracket - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fixture for fixing an electric component such as an electric connector to a circuit board.

[0002]

2. Description of the Related Art Generally, it is common to mount an electric component such as an electric connector on a circuit board, form a part of an electronic circuit together with an active device such as an IC, and interconnect these electronic circuits and other circuits via an electric connector. It is heavily used. For example, when electronic circuits formed on two circuit boards are interconnected via an electrical connector, maintenance serviceability of electronic equipment using such electronic circuits can be improved and high-density mounting is possible.

When an electrical connector, particularly an electrical connector having a large number of contacts, is soldered to conductive pads or through holes on a circuit board, it is necessary to temporarily secure an insulating housing of the electrical connector to the circuit board. Further, even after the solder connection, it is preferable that the insulating housing is securely fixed to the circuit board in order to prevent an excessive force from acting on the contact terminal when the connector is inserted and removed, and to prevent the connection with the solder from being disconnected.

[0004] A conventional example of such a fitting for an electric connector is disclosed in, for example, Japanese Utility Model Publication No. 1-46455.
That is, it is generally a flat plate formed by punching an elastic metal plate. It has a pair of legs extending in one direction and spaced apart from one end of the base. An engagement projection is formed on the outer surface near the free end of the leg so as to frictionally engage the inner wall of the opening of the circuit board. An opening is formed in the base as necessary, and engagement projections are formed on both side surfaces of the opening. When the head is pressed and pressed into the circuit board, the engagement projection is formed on the inner wall of the insulating housing of the electrical connector. It is formed so as to be engaged or bite into and fixed. In addition, 63-97
No. 73 discloses a metal plate having a leg piece hanging from a free end tip of a pair of arm plates extending perpendicular to the mounting plate portion and parallel to each other from both lower ends of a mounting plate portion having a mounting hole. A bent connector fitting is disclosed.

[0005]

However, in such a conventional fixing bracket, since a pair of legs extend in one direction in a flat plate shape, desired elasticity cannot be obtained unless it has sufficient dimensions. There was a disadvantage. In other words, it has been difficult to obtain a small, low-profile fixing bracket suitable for a recent small-sized electric component or electric connector having a particularly low-profile structure. Also,
In a connector mounting bracket as disclosed in Japanese Utility Model Laid-Open Publication No. 63-9773, as can be understood from the development,
Since a large area is required for forming the connector mounting bracket, the material is poor and expensive, and the use of an arm plate perpendicular to the circuit board surface makes it difficult to achieve a low profile structure. was there.

Accordingly, there is a need to realize a fixing bracket which is small, low-profile, has excellent elasticity, and can be manufactured at low cost, and which is suitable for attaching an electric component such as an electric connector to a circuit board.

The fixing bracket of the present invention is made of a metal plate which is screwed to an electric component such as an electric connector and is inserted and fixed in a through hole of a circuit board, and has a substantially flat plate shape which is substantially perpendicular to the surface of the circuit board. And a L-shaped portion consisting of a first portion and a second portion extending substantially in an L-shape from the lower end of the base, and has the following features. That is, the first portion of the L-shaped portion is wider than the second portion, a substantially T-shaped opening is formed in the first portion, and a groove is formed up to the tip of the second portion following this opening to form a L-shaped portion. A pair of elastic legs having a large effective length is formed in the letter-shaped portion, and a round hole with a thread is formed in the base portion, and is fixed to an electric component by a mounting screw.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIGS. 1, 2 and 3 show a front view, a side view and an upper (flat) view of a preferred embodiment of the fixing device according to the present invention, respectively.

[0010] The fixing bracket 10 has a base portion 20 and approximately L from one end thereof.
And an L-shaped part 30 bent in a letter shape. As shown by a broken line in FIG. 1, the fixing bracket 10 is connected to a carrier 40 that integrally connects and holds a plurality of fixing brackets 10 that are simultaneously punched and formed at the upper end of the base 20. The fixing bracket 10 is obtained. Although only one fixture 10 is shown in FIG. 1, multiple fixtures 10 are formed simultaneously. A reference opening 42 is formed corresponding to the position of each fixing bracket 10 of the carrier 40.

The fixing bracket 10 is preferably manufactured by punching and bending a brass plate having a thickness of, for example, about 0.6 mm with a press. Further, if necessary, a nickel plating base may be subjected to a solder plating finish.

The base 20 is in a preferred embodiment a substantially square of about 5.5 mm and has a centrally formed circular hole 21 projecting in one direction. A thread 22 is formed on the inner surface of the round hole 21 as shown by a broken line. As with the conventional fixing bracket, a mounting screw (not shown) for mounting an electric component, such as an electric connector, together with a shield plate to a panel or the like is inserted into the screw thread 22, and fixed to, for example, both ends of an insulating housing of the electric connector. Is done.
The reason why the round hole 21 is formed so as to protrude is to use a thin plate of, for example, about 0.6 mm and to increase the number of the threads 22 to reinforce the strength of the mounting screw by setting the substantial plate thickness to, for example, about 1.4 mm. To do that.

At one (lower) end of the base 20, a relatively flat first portion 31 and a second portion 32 formed with a pair of elastic legs 33 are formed through a relatively narrow transition portion 23. A character 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 in a substantially octagonal shape, and a substantially triangular engaging projection 35 is formed outside the free end.

As shown by a broken line in FIG.
It is press-fitted and held in 50 through holes 51. Through hole
The dimension of 51 is selected to be smaller than the dimension between both outer ends of the engagement projection 35 (for example, 3.3 mm). Therefore, the fixing bracket 10 is attached to the circuit board.
Pressing into the through hole 51 of the 50
The outer surface of 35 is in contact with the inner wall of
Are bent inward, that is, toward each other. When the top of the engaging projection 35 is exceeded, the elastic leg 33 returns outward due to its elasticity, and the slope of the engaging projection 35 and the first portion 31 (or the insulating housing of the electrical connector using the fixing fitting 10 as described later). The circuit board 50 is sandwiched between the bottom surfaces of ().

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

FIGS. 4A and 4B are a front view and a cross-sectional view taken along line BB of the electrical connector 60 using the fixture 10 according to the present invention.

The electrical connector 60 includes an insulating housing 61,
A shield member 62 disposed on the front surface thereof and having a substantially D-shaped portion 63 protruding at the center, a number of contacts 64 inserted and held in the insulating housing 61, and a pair of fixing brackets attached to both ends of the insulating housing 61. Consists of ten.

Each contact 64 of the electrical connector 60 has a connection disposed within the D-shaped portion 63 of the shell or shield member 62 and a solder connection protruding from the bottom surface of the insulating housing 61. The contact part of the contact 64 is the upper, middle and lower 3
Similarly, the solder connection portions are also drawn out in three rows, and inserted and connected to through holes arranged at high density on the circuit board 50 (see FIG. 1).

The fixing bracket 10 pushes the base 20 into a concave portion 65 formed on the rear surface near both ends of the insulating housing 61, and has a round hole.
21 is screwed through the aligned insulating housing 61 and the through holes 66 and 67 of the shield member 62. In this particular embodiment, the circuit board 50 is sandwiched between the bottom surface of the insulating housing 61 and the engaging projection 35 on the outer surface of the elastic leg 33 projecting outward from the bottom surface. This elastic leg 33 is preferably located on the center row of the solder connection of the contact 64.

As described above, the fixing fitting of the present invention has been described in detail with reference to a preferred embodiment. However, the present invention is not limited to only such an embodiment, and various modifications can be made without departing from the gist of the present invention depending on the application. It can be understood that the deformation can be changed.

For example, when it is not preferable that the free end of the elastic leg 33 protrudes from the bottom surface of the circuit board 50, the elastic leg 33 is shortened so that the engaging projection engages with the inner surface of the through hole of the circuit board. It may be. Further, the engaging projections may be formed in two or more sawtooth shapes for each elastic leg. Further, serrated engagement portions may be formed at both end edges of the base portion 20 so as to bite and fix the inner surface of the groove of the insulating housing of the electric connector.

As understood from the above description, according to the fixing bracket of the present invention, each of the fixing brackets has a base, a first part, and a second part which are substantially flat and substantially perpendicular to each other. A substantially T-shaped opening is provided to form a pair of elastic legs. Therefore, a small number of fixing brackets can be manufactured by punching and bending a large number of metal fittings from a metal plate in close proximity to each other, and a pair of elastic legs having good elasticity can be obtained. It is very suitable for electric components such as electric connectors.

[Brief description of the drawings]

FIG. 1 is a front view of a preferred embodiment of a fixture according to the present invention mounted in a through hole of a circuit board.

FIG. 2 is a side view of the fixing bracket of FIG. 1;

FIG. 3 is a plan view of the fixing bracket of FIG. 1;

FIG. 4 is a front view and a sectional view of an electric connector using the fixing fitting of FIG. 1;

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H01R 13/648-13/652 H01R 23/00 H01R 9/00

Claims (1)

(57) [Scope of request for utility model registration] 1. A metal plate fixing member screwed to an electric component such as an electric connector and inserted and fixed in a through hole of a circuit board, wherein the metal plate is a substantially flat plate that is substantially perpendicular to the circuit board surface. And a L-shaped part comprising a first part and a second part extending in a substantially L-shape from the lower end of the base, wherein the first part of the L-shaped part is the second part A pair of a large effective length is formed in the L-shaped portion by forming a substantially T-shaped opening in the first portion and forming a groove to the tip of the second portion continuously from the opening. A fixing bracket, wherein an elastic leg is formed, a round hole with a thread is formed in the base, and the base is fixed to the electric component by a mounting screw.