JPH1186988A - Reinforcing bracket for electric parts and electric parts with reinforcing bracket - Google Patents

Abstract

PROBLEM TO BE SOLVED: To fix electric parts to a printed board, etc., at or near the four corners of a housing, make a mounting area compact, restrain the increase of a cost, improve wrench strength and separation strength and housing rigidity and put the fixed portion nearer the four corners of the housing. SOLUTION: A reinforcing backet, which is provided for electric parts having terminals 20 on two opposite sides of a housing 10 formed in almost rectangular shape in a plane view, has a mainbody 31 internally provided in the housing along the remaining two sides and mounting part 32 with tip end faces almost flush with each other continuously provided near both ends of the mainbody along at least remaining sides and protruded to the bottom side of the housing. The housing is formed to be press fitted into a vertical through-hole, with the locking edge 35 formed in an area, held between continuously provided areas to the mounting part in the mainbody to be locked to a contact portion 17 to connect the inner wall of the through-hole to the remaining sides in the crossing direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of an electric component having terminals, as exemplified by a connector mounted on a printed circuit board. In particular, this electric component is fixed on a surface with high strength. Metal fittings, and an electric component with a reinforcing fitting using the same.

[0002]

2. Description of the Related Art As a connector mounted on a printed circuit board, for example, as shown in FIG. 8, terminals 52 are arranged side by side on two opposite sides of a housing 51 having a substantially rectangular shape in plan view. It has been known. This connector is fixed to the printed circuit board 53 by soldering the terminals 52... To each part of the pattern. Then, by fitting the housing of the mating connector into the housing 51, the terminals of both connectors can be brought into pressure contact with each other to achieve electrical connection between the terminals. An external force is applied to such a connector, for example, in connection with the detaching operation of the mating connector. If this acts on the terminals 52, the soldered portions of the terminals 52 may be damaged, causing various problems. There is. That is, when a force is applied to push or pull the housing 51 against the printed board 53, the soldered portion of the terminal 52 or the like is damaged, and the connector is separated from the printed board 53. Further, when a “torsion force” such as rolling the housing 51 against the printed circuit board 53 is applied, some of the terminals 52
The soldered part of the device may be damaged, resulting in poor connection.

Conventionally, reinforcing brackets 5 are provided on the remaining two sides (two sides without terminals 52...) Of the housing 51.
4, 54 have been provided facing each other. The reinforcing metal fitting 54 is attached to the housing 51 along the remaining side.
And a mounting portion 56 connected to the main body portion 55 and having a substantially flush front end surface and protruding toward the bottom surface side of the housing 51. When the mounting portion 56 is soldered to the printed circuit board 53, the housing 51 is firmly fixed to the printed circuit board 53 via the reinforcing metal fitting 54, and most of the external force acting on the connector is received by the reinforcing metal fitting 54. Therefore, the peeling strength and the prying strength of the connector with respect to the printed circuit board 53 can be enhanced. In this case, the attachment of the reinforcing member 54 to the housing 51 is performed, for example, by press-fitting the reinforcing member 54 from above into a through hole 57 penetrating the housing 51 in the height direction. The position where the press-fitting of the reinforcing metal fitting 54 into the housing 51 is completed is determined, for example, by the locking portion 5 that protrudes outside the portion of the main body 55 that is connected to the mounting portion 56.
9 is received by the contact portion 58 formed on the inner wall of the through-hole 57, whereby the distal end surface of the reinforcing metal fitting and each terminal is adjusted to be flush.

[0004]

In the above-mentioned conventional connector, since the reinforcing metal fittings 54, 54 are provided on both sides of the housing 51 so as to face each other, for example, the two reinforcing metal fittings 54, 54 are connected to the housing 51. When a "prying force" is applied around the axis, the housing 51 easily rolls around the reinforcing metal fittings 54, 54, and a high prying strength cannot be expected.

[0005] Further, as the limit design such as making the entire connector compact is advanced, the reinforcing metal fittings 54, 5
In some cases, it is not possible to secure a sufficient peeling strength by merely providing No. 4, and there is a demand for obtaining a higher peeling strength.

[0006] The above-mentioned reinforcing metal fitting 54 is a so-called I-butt type. On the other hand, a so-called gull-wing type in which the tip of the mounting portion is bent outward in an L-shape.
There is a type of reinforcing metal, which seems to improve the peel strength and the prying strength to some extent. However, since the tip of the mounting portion comes out of the housing in plan view, the area occupying the printed circuit board in plan view is correspondingly increased.
That is, there is a disadvantage that the mounting area becomes large. Also,
During manufacturing, a step of bending the tip of the mounting portion outward in an L-shape and a step of adjusting the bending angle are required, which causes an increase in cost. In addition, a step of adjusting the front end face of the mounting portion, which comes into contact with the printed circuit board, and the front end face of each terminal is also required, which further increases the cost.

The present invention has been made in view of such a point, and an object of the present invention is to provide two opposite sides of a housing which is substantially rectangular in plan view as exemplified by the above-described connector. By fixing the housing to a mating member such as a printed circuit board at least at a portion near four corners in a plan view as a reinforcing bracket provided on an electric component having a terminal on the side, the mounting area of the electric component is reduced and the cost is increased. It is an object of the present invention to provide a reinforcing member having a higher torsion strength in all directions and a higher peeling strength than a conventional product, while suppressing the conventional product, and to provide an electric component provided with the reinforcing member.

In the case where the reinforcing bracket is attached to the housing by press-fitting the reinforcing bracket into the through-hole of the housing, the through-hole tends to have a laterally long cross section whose major axis extends in the direction along the remaining side. However, at this time, the housing rigidity in the direction of the short diameter of the through-hole is reduced, and the housing may be damaged, or the through-hole may be deformed after the press-fitting is completed, and the reinforcing bracket may come off.

Therefore, in the present invention, the inner wall of the through hole is connected to reinforce the housing, and a reinforcing bracket is press-fitted so as to straddle the reinforcing portion, thereby increasing the housing rigidity in the short diameter direction of the through hole. In addition to preventing damage to the housing and detachment of the reinforcing fitting, the press-fitting completion position of the reinforcing fitting with respect to the housing can be determined without providing the locking portion and the contact portion, and the fixing position of the reinforcing fitting to the mating member is further increased. The object is to approach the four corners of the housing to further improve the prying strength and to reduce the size of the reinforcing bracket and the electric components.

[0010]

In order to achieve the above object, an electric component reinforcing bracket according to claim 1 is provided on an electric component having terminals on two opposite sides of a housing having a substantially rectangular shape in plan view. And a main body portion provided in the housing along the remaining two sides and at least near both ends of the main body portion along the remaining sides, and having a substantially flush distal end surface. And a mounting portion protruding from the bottom surface of the housing.

If the reinforcing metal fitting is provided on the other two sides of the housing of the electric component and the mounting portion is soldered to the mating member, the electric component is fixed to the mating member. In this case, since the mounting portion is provided at least near both ends along the remaining side of the main body, at least four mounting brackets are used.
The two mounting portions will be located at approximately four corners of the housing. Therefore, even if a "prying force" is applied around any axis, the housing is unlikely to roll, and a high prying strength is obtained. Further, since the distance from the mounting portion to the terminal is shortened, even if the housing is rolled, the displacement of the terminal is reduced, which contributes to the enhancement of the torsion strength.

Also, since there are at least four mounting portions,
The entire length of the fillet formed by soldering on the peripheral edge of the end face of the mounting portion is increased, and high peel strength is obtained.

According to a second aspect of the present invention, the reinforcing member for an electric component is configured so as to be press-fittable into a through-hole penetrating the housing in the height direction in the configuration of the first aspect, and is connected to each mounting portion in the main body. At a portion sandwiched between the provided portions, a locking edge portion is formed to lock an inner wall of the through hole with a contact portion that connects the inner wall of the through hole in a direction crossing the remaining side.

According to this structure, since the inner walls of the through holes are connected by the abutting portions, the rigidity of the housing in the direction intersecting with the remaining sides, that is, in the short diameter direction of the through holes, is increased, and the damage of the housing and the reinforcing metal fittings are reduced. Dropout is prevented. Further, when the reinforcing metal is press-fitted into the through hole, the locking edge of the reinforcing metal main body is locked to the abutting portion of the housing and positioned, so that the press-fitting completed position of the reinforcing metal in the housing is determined. As a result, it is not necessary to provide the locking portion and the contact portion, so that the mounting portion can be closer to the four corners of the housing, the prying strength is further increased, and the reinforcing bracket and the electric component can be made compact. .

According to a third aspect of the present invention, there is provided an electric component with a reinforcing bracket, a housing having a substantially rectangular shape in a plan view, terminals provided on two opposite sides of the housing, and reinforcement provided on the remaining two sides. A metal fitting is provided, and the reinforcing metal fitting is connected to the main body portion provided in the housing along the remaining two sides and at least near both ends of the main body portion along the remaining sides, and is substantially flush. And a mounting portion having a front end surface and protruding toward the bottom surface side of the housing.

The electric component with the reinforcing metal fitting is fixed to the mating member by soldering the mounting portion to the mating member. In this case, since the mounting portions are provided at least near both ends along the remaining sides of the main body, at least four mounting portions are arranged at substantially four corners of the housing by the two reinforcing metal fittings. Therefore, even if a "prying force" is applied around any axis, the housing is unlikely to roll, and a high prying strength is obtained. Further, since the distance from the mounting portion to the terminal is shortened, even if the housing is rolled, the displacement of the terminal is reduced, which contributes to the enhancement of the torsion strength.

Further, since there are at least four mounting portions,
The total length of the fillet formed around the end surface of the mounting portion by soldering is increased, and high peel strength is obtained.

According to a fourth aspect of the present invention, there is provided the electric component with the reinforcing member, wherein the housing is formed with a through-hole through which the reinforcing member is press-fitted in the height direction.
A contact portion that connects the inner wall of the through hole in a direction intersecting with the remaining sides is formed, and a portion of the main body of the reinforcing bracket that is sandwiched between the connection portions with the mounting portions includes the above-described portion. A locking edge for locking to the contact portion is formed.

According to this structure, the inner wall of the through hole is connected at the contact portion, so that the rigidity of the housing in the direction intersecting with the remaining sides, that is, the short diameter direction of the through hole is increased, and the damage to the housing and the reinforcing metal fitting are reduced. Dropout is prevented. Further, when the reinforcing metal is press-fitted into the through hole, the locking edge of the reinforcing metal main body is locked to the abutting portion of the housing and positioned, so that the press-fitting completed position of the reinforcing metal in the housing is determined. As a result, it is not necessary to provide the locking portion and the contact portion, so that the mounting portion can be closer to the four corners of the housing, the prying strength is further increased, and the reinforcing bracket and the electric component can be made compact. .

[0020]

Embodiments of the present invention will be described below with reference to the drawings. Here, a connector mounted on a printed circuit board is exemplified as an electric component. However, any electric component including a housing having a substantially rectangular shape in plan view and having terminals on two opposite sides thereof is an object of the present invention. .
Also, the mating member on which the electric component is mounted is not limited to the printed circuit board, and a member having a surface is widely applicable.

FIG. 1 shows a reinforcing metal fitting of the connector according to the embodiment, and FIG. 2 shows a connector provided with the reinforcing metal fitting. The connector includes a housing 10 having a substantially rectangular shape in a plan view.
For example, it is formed of an insulating material such as a synthetic resin. Conductive terminals 20 are arranged side by side on two opposing sides 11 and 13 of the housing 10 specified in plan view in FIG. This connector is fixed to the printed circuit board P by soldering the terminals 20 to each part of the pattern. Then, by fitting the housing of the mating connector into the housing 10, the terminals of both connectors can be brought into pressure contact with each other to achieve electrical connection between the terminals.

The housing 10 is provided with two reinforcing metal fittings 30, 30 along the remaining two sides 12, 14 specified in a plan view of FIG. This reinforcing bracket 3
Reference numeral 0 denotes a main body 31 provided inside the housing 10 along the remaining two sides 12 and 14, and at least near both ends of the main body 31 along the remaining sides 12 and 14, which are substantially continuous. Mounting portions 32, 32 having a single distal end surface and protruding toward the bottom surface of the housing 10.

As shown in FIG. 3, the housing 10 has a through hole 1 passing therethrough in the height direction (vertical direction in FIG. 3).
5 are formed, and the reinforcing fitting 30 is press-fitted into the through hole 15. The through-hole 15 has a contact portion 17 that connects the inner wall of the through-hole 15 in a direction intersecting the remaining sides 12 and 14 in a plan view (for example, the direction A1 in FIG. 5). On the other hand, a locking edge 35 is formed at a portion of the main body 31 of the reinforcing metal fitting 30 that is sandwiched between the connecting portions 32, 32, and the locking edge 35 is formed by the abutting portion. It is configured to be locked to the upper edge of the reference numeral 17.

At the end of the main body 31, locking portions 33, 33 projecting outward from portions connected to the mounting portions 32, 32 are formed. On the other hand, the inner wall of the through hole 15 has a contact portion 1 for receiving the locking portions 33, 33.
6 and 16 are formed. The contact portion 16 has a horizontal surface 16a facing in the penetrating direction (vertical direction) of the through hole 15.
And a vertical surface 16b substantially along the penetrating direction. The horizontal surface 16a stops the locking portion 33 from moving in the vertical direction, and the vertical surface 16b controls the horizontal direction of the locking portion 33. The movement in the direction is stopped. A projection 34 is provided on the end surface of the locking portion 33 in the direction along the remaining sides 12 and 14.
Are formed, and the projections 34 correspond to the vertical surface 16b of the contact portion 16.
To prevent the reinforcement fitting 30 from coming out upward.

The reinforcing bracket 30 is a plate-like body and is formed by, for example, press working. As a specific example, as shown in FIG. 4, a plurality of reinforcing metal fittings 30 are punched out of a plate material B, excluding, for example, a central portion of the main body portion 31, and this is punched out of a plurality of housings 10.・ Press it into
After that, a method of cutting off the central portion of the main body 31 that is connected only from the rest of the plate material B is exemplified.
In this case, depending on the configuration of the production line, if the reinforcing brackets 30 are bent perpendicularly to the rest of the plate material B as shown in FIG. It is only necessary to move the end portions on the sides of the remaining sides 12 and 14, thereby facilitating the work. In addition, since the reinforcing metal of the present invention can be manufactured by other manufacturing processes, the upper end of the main body of the reinforcing metal does not always have a bent shape.

Therefore, the connector is fixed to the printed circuit board P by pressing the reinforcing fitting 30 of the above embodiment into the through hole 15 of the connector housing 10 and soldering the mounting portions 32, 32 to the printed circuit board P. In this case, since the mounting portions 32, 32 are provided near both ends of the main body 31 along the remaining sides 12, 14, the four mounting portions 32,.
0 will be arranged at almost four corners. Therefore, FIG.
Any axis A1, A2, A
3. Even if a "torsion force" is applied around A4..., The housing 10 is hard to roll, and a high torsion strength is obtained. Further, as shown in FIG. 5, the distance D from the mounting portion 32 to the terminal 20 is shorter than that of the conventional one, so that even if the housing 10 is rolled, the displacement of the terminal 20 becomes small, and the torsion strength is reduced. Contribute to reinforcement.

As shown in FIG. 6, a fillet F is formed by soldering at the periphery of the end face of the mounting portion 32. Since the connector has four mounting portions 32, the fillet F
Has a longer overall length, and high peel strength can be obtained.

Further, since the reinforcing bracket 30 is basically a so-called I-bat type I, the mounting area of the connector can be made smaller than that of a so-called gull-wing type reinforcing bracket, and the reinforcing bracket can be reinforced. Hardware 3
In addition, it is possible to reduce the bending process at 0 and to reduce the time and effort for adjusting the surface of the reinforcing bracket 30 and the terminal 20, thereby suppressing an increase in cost.

Further, since the inner wall of the through hole 15 is connected by the abutting portion 17, the rigidity of the housing in the direction intersecting with the remaining sides 12, 14, ie, the short diameter direction of the through hole, is increased, and the short diameter of the through hole 15 is reduced. The deformation that expands in the direction is prevented, so that damage to the housing 10 and detachment of the reinforcing bracket 30 can be prevented. Further, when the reinforcing fitting 30 is press-fitted into the through hole 15,
Since the locking edge 35 of the reinforcing member main body 31 is positioned by being locked to the abutting portion 17 of the housing 10, the press-fitting completion position of the reinforcing member 30 in the housing 10 is determined.
As a result, it is not always necessary to provide the locking portion 33 and the contact portion 16, and the mounting portion 32 is further attached to the housing 1.
0 can be made closer to the four corners, the prying strength is further improved, and the reinforcement fitting 30 and the electric component can be made compact.

Further, since the engaging portion 33 is formed on the reinforcing member 30 and is received by the contact portion 16 of the housing 10, the positioning of the reinforcing member 30 with respect to the housing 10 in the vertical direction and the horizontal direction is more reliably performed.

Further, as described above, a plurality of reinforcing brackets 30 are punched out of the plate material B,
When the method of press-fitting into the through-holes 15 of... And then cutting off the central portion of the main body 31 that is connected only from the rest of the plate material B is adopted,
.. Can be assembled into a plurality of housings 10... In a state where the surfaces of... Are aligned, so that a large number of connectors with reinforcing fittings can be simultaneously manufactured with high quality, and productivity can be increased.

The present invention is not limited by the embodiment described above. For example, an embodiment in which the reinforcing fitting 30 is configured to be press-fittable into the through hole 15 of the housing 10, the locking portion 33 and the contact portion 16 are provided, and the locking edge 35 and the contact portion 17 are not provided. Further, the reinforcement fitting 30 is configured to be press-fittable into the through hole 15 of the housing 10, and the locking portion 33 and the contact portion 16 are not provided.
Further, the embodiment includes an embodiment in which the locking edge portion 35 and the contact portion 17 are provided.

Further, the remaining sides 12, 1 of the locking portion 33
The projection 34 is formed on the end face in the direction along the direction 4 and is made to bite into the vertical surface 16b of the contact portion 16, but as shown in FIG. 1
A projection 34 may be formed on the outer end face in the direction along the lines 2 and 14, and may be made to bite into the inner wall of the through-hole 15. Alternatively, as shown in FIG. A protrusion 3 is provided on the inner end face in the direction along the remaining sides 12 and 14.
4 may be formed and this may be bitten into the contact portion 17. Further, the protrusion 34 of the embodiment of FIG.
The protrusion 34 of the embodiment of FIG. 7A and the protrusion 34 of the embodiment of FIG. 7B may be appropriately combined. In any case,
When the projections 34 bite into the respective portions I of the housing 10, the reinforcement fittings 30 can be prevented from coming off. In particular, when the housing 10 is formed of, for example, a material having high hardness and the projections 34 are difficult to penetrate deeply, if the number of the projections 34 is increased by combining the projections 34 of the above-described three embodiments, the reinforcing metal fitting 30 can be attached to the housing 10. It can be fixed securely.

Further, in the above embodiment, the reinforcing fitting 3
Although 0 is a plate-like body, it may be a molded body having irregularities, for example. In the above-described embodiment, the attachment portions 32, 32 are provided near both ends of the main body 31 along the remaining sides 12, 14, but in addition, the third portion is provided between both ends of the main body 31. The mounting portions 32 may be provided, and more mounting portions 32 may be provided. Then, the peel strength and the pry strength are further increased. Further, in the above-described embodiment, the reinforcing fitting 30 is press-fitted into the through-hole 15 of the housing 10. However, the through-hole 15 is provided in the housing 10 by, for example, installing the reinforcing fitting 30 in a mold of the housing 10 and molding the same at the same time. The reinforcing fitting 30 may be buried in the housing 10 without using it. At that time, the contact portion 16 and the locking portion 3
3 and an embodiment in which neither the contact portion 17 nor the locking edge portion 35 is provided, and the through hole 15 and the projection 34 are not included.

[0035]

As described above, according to the electric component reinforcing bracket of the first aspect, since at least four mounting portions are arranged at substantially four corners of the housing, "prying force" is applied around any axis. In addition, the housing is difficult to roll, and the distance from the mounting part to the terminal is short, so even if the housing is rolled, the displacement of the terminal is small, so that the twisting strength of the electric component is omnidirectional compared to the conventional product. Can be strengthened. In addition, since there are at least four attachment portions, the total length of the fillet becomes longer, and the peel strength of the electric component can be enhanced as compared with the conventional product. Furthermore, the mounting area of the electric component can be made smaller than that of the so-called gull-wing type reinforcing bracket,
The cost of processing and adjustment can be reduced and the cost can be reduced.

According to the second aspect of the present invention, the housing rigidity in the direction of the short diameter of the through-hole can be enhanced, and the damage of the housing and the detachment of the reinforcing metal can be reliably prevented, and the housing can be provided without providing the locking portion and the contact portion. Since the press-fitting completion position of the reinforcing metal fitting in (1) can be determined, the mounting portion can be further brought closer to the four corners of the housing, the prying strength can be further increased, and the reinforcing metal fitting and the electric component can be made compact.

According to the third aspect of the present invention, since at least four mounting portions are arranged at substantially four corners of the housing, the housing is not easily rolled even if a "twisting force" is applied around any axis. Since the distance from the mounting portion to the terminal is shortened, the displacement of the terminal is reduced even if the housing is rolled, so that the twisting strength of the electric component can be omnidirectionally enhanced as compared with the conventional product.
In addition, since there are at least four attachment portions, the total length of the fillet becomes longer, and the peel strength of the electric component can be enhanced as compared with the conventional product. Furthermore, the mounting area can be made smaller as compared with the use of a so-called gull-wing type reinforcing metal fitting, and the cost for processing and adjustment can be reduced.

According to the present invention, the rigidity of the housing in the direction of the short diameter of the through-hole can be increased, and the damage of the housing and the detachment of the reinforcing bracket can be reliably prevented. Since the press-fitting completion position of the reinforcing metal fitting in (1) can be determined, the mounting portion can be further brought closer to the four corners of the housing, the prying strength can be further increased, and the reinforcing metal fitting and the electric component can be made compact.

[Brief description of the drawings]

FIG. 1 shows a reinforcing bracket according to an embodiment, wherein (a) is a front view,
(B) is a side view.

FIG. 2 is a reduced perspective view of the connector with a reinforcing fitting of the embodiment.

FIGS. 3A and 3B show a main part of a connector with a reinforcing bracket of the embodiment, and FIG.
(B) is a side view in which a part of the housing is sectioned.

FIGS. 4A and 4B show a state before the reinforcing bracket of the embodiment is separated from a plate material. FIG. 4A is a bottom view, and FIG. 4B is a side view in an inverted state, based on the reinforcing bracket.

FIG. 5 is a plan view of the connector with a reinforcing fitting of the embodiment.

FIG. 6 is an enlarged front view showing a fillet formed on a mounting portion of the reinforcing fitting of the embodiment.

FIG. 7 is a front view showing a reinforcing bracket according to a modified example of the embodiment.

8A and 8B show a conventional example, in which FIG. 8A is a front view in which a part of a housing is sectioned, and FIG. 8B is a side view in which a part of the housing is sectioned.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Housing 11, 13 Opposite side 12, 14 Remaining side 15 Through-hole 16 Contact part 17 Contact part 20 Terminal 30 Reinforcement metal fitting 31 Main body part 32 Attachment part 33 Locking part 35 Locking edge P Printed circuit board B Plate material A1 Axis A2 Axis A3 Axis A4 Axis D Distance F Fillet

Claims (4)

[Claims] 1. A reinforcing member provided on an electric component having terminals on two opposite sides of a housing having a substantially rectangular shape in a plan view, wherein the main body is provided inside the housing along the remaining two sides. And an attachment part which is provided at least near both ends of the main body along the remaining side, has a substantially flat front end surface, and protrudes toward the bottom surface side of the housing. Metal fittings. 2. An inner wall of the through-hole, which is configured to be press-fittable into a through-hole penetrating the housing in the height direction and that is sandwiched between portions of the main body that are connected to the respective mounting portions. The reinforcing metal fitting for an electric component according to claim 1, wherein a locking edge portion that locks with a contact portion connected in a direction crossing the remaining sides is formed. 3. A housing having a substantially rectangular shape in a plan view, a terminal provided on two opposite sides of the housing, and a reinforcing metal provided on the remaining two sides. A main body portion provided in the housing along the remaining two sides, and a bottom surface of the housing having a substantially flush distal end surface provided at least near both ends of the main body portion along the remaining sides. An electric component with a reinforcing fitting, comprising: a mounting portion protruding to the side. 4. The housing has a through-hole through which the reinforcing metal fitting is press-fitted through the housing in a height direction, and a contact portion connecting an inner wall of the through-hole in a direction intersecting with the remaining side. The locking edge part which locks with the said contact part is formed in the site | part pinched | interposed with the connection part with each attachment part in the main-body part of a reinforcement metal fitting while being formed. Electrical parts with reinforcement fittings.