JPH069068U - Electrical component - Google Patents

Abstract

(57) [Abstract] [Purpose] Surface mounting can be performed reliably and the terminal spacing can be made small. [Configuration] A plurality of contact accommodating holes 2 on the front surface of the main body 21
3, the socket contacts 29 are accommodated in the respective contact accommodating holes 23 from the rear surface, and one end of the plate-shaped terminal 31 is integrally connected to the rear surface of the contact 29.
Is extended to the side of the bottom surface 21 of the main body 21, and its extended end is bent and extended backward, and the bottom edge of this terminal end portion 31b is a connection edge 32 located on a plane parallel to the bottom surface 21a. The plate surface of each part of the terminal 31 is perpendicular to the bottom surface 21a, and the terminal 31 and the contact 29 are integrally formed by pressing a metal plate. The terminal 31 is held by the terminal holding portion 24 on the back surface of the main body 21. Connection edge 32
Are soldered to the lands 14 of the wiring board 13.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to electrical components especially adapted for surface mounting.

[0002]

[Prior art]

 As shown in FIG. 4, conventional electrical components of this type have plate-shaped terminals 12 protruding from both side surfaces of a rectangular parallelepiped main body 11, and the plate-shaped terminals 12 have a plate surface parallel to the bottom surface of the main body 11 at the protruding portion. Immediately after the protrusion, they are bent and extended to the bottom surface side of the main body 11, and then extended outward to be parallel to the bottom surface of the main body to form the connection portion 12a. These connecting portions 12a are soldered onto the lands 14 on the wiring board 13.

[0003]

[Problems to be solved by the device]

 In the conventional surface mounting, the terminal end portion is parallel to the bottom surface of the main body 11, and the end plate surface of the terminal 12 is in contact with the land of the wiring board. The plate surface is bent at two points 15 and 16 at the end portion and the direction perpendicular to the bottom surface of the main body. Since the bending accuracy of these is low, the parallelism of the connecting portion 12a with the bottom surface of the main body is poor, and the wiring board The attitude toward 13 is not stable. Therefore, the soldering between the connecting portion 12a and the land 14 is not performed well, and the connection strength is weak.

Further, since the plate surface of the connecting portion 12a is connected to the land, the solder connecting surface becomes wide and there is a limit to narrowing the terminal interval.

[0005]

[Means for Solving the Problems]

 (1) According to the invention of claim 1, in the electrical component in which the plurality of plate-shaped terminals are projected from the main body, one edge of the protruding end of each terminal is parallel to the bottom surface of the main body in the vicinity of the bottom surface. The connection edges are located on a plane, and no bending of the plate surface in the direction perpendicular to the plane is formed on each terminal. In other words, the plate surface of each part of the terminal is perpendicular to the bottom surface of the main body.

(2) According to the invention of claim 2, in addition to the above item (1), the metal mounting leg provided so as to project downward from the bottom surface of the main body has a surface including the bottom surface of the main body. On the other hand, it is a cylindrical body having a vertical axis, preferably a gentle conical tubular body with the lower end being the apex side.

[0007]

【Example】

 FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows an exploded perspective view thereof. This example is a case where this invention is applied to a connector. The main body 21 of the synthetic resin material is substantially a rectangular parallelepiped, and a circular groove 22 is formed in the front surface thereof, and inside the circular groove 22, a plurality of contact receiving holes 23 are formed in the front surface of the main body 21.

The rear portion of the main body 21 is formed separately as a terminal holding portion 24. The terminal holding portion 24 has a generally plate-like body, and the connecting arms 25 projecting forward are integrally formed on both sides of the terminal holding portion 24. The projecting ends of these connecting arms 25 are integrally provided with the claws 26 inside each other. Is formed in Engagement grooves 27 are formed on both side surfaces of the main body 21 from the back surface toward the front, and engagement recesses 28 are formed at the front ends of these engagement grooves 27. The connecting arm 25 is inserted into the engaging groove 27, the claw 26 is inserted into and engaged with the engaging concave portion 28, and the terminal holding portion 24 is attached to the main body 21.

The contacts 29 are inserted and accommodated in the respective contact accommodating holes 23 from the rear. The contact 29 is a socket contact, and has a shape in which one side plate of a square tubular body is removed as a whole, and a pin contact of a mating connector can be elastically sandwiched between a pair of opposing side plates. One end of the plate-shaped terminal 31 is integrally connected to the rear end of the contact 29. The terminal 31 is slightly extended rearward from the contact 29, and is then bent to the bottom surface 21a of the main body 21 to form a vertical portion 31a. In this invention, the plate surface of each part of the terminal 31 is perpendicular to the main body bottom surface 21a, and the plate surface is not bent in a direction perpendicular to the main body bottom surface 21a. The extension end of the vertical portion 31a of the terminal 31 is bent and extended rearward so that the bottom edge of this end portion 31b is located near the bottom surface 21a of the main body and is located on a plane parallel to the bottom surface 21a. The parallel connection edges 32 are formed. The contact 29 and the terminal 31 are integrally formed by pressing a metal plate.

A groove 33 perpendicular to the bottom surface 21 a is formed on the front surface of the terminal holding portion 24, and the rear edge of the vertical portion 31 a is guided and inserted into the groove 33 for positioning and holding. In addition, a pair of holding protrusions 34 sandwiching the end 31b of each terminal 31 are integrally formed on the terminal holding part 24, and the end 31b of the terminal 31 is rearward through a groove 35 formed on the bottom surface of the terminal holding part 24. Overhangs. The front end surface of the holding protrusion 34 is in contact with the back surface of the main body 21. A restraining portion 36 is integrally formed so as to project in front of the terminal holding portion 24 so as to face each contact receiving hole 23, and each restraining portion 36 restrains the back surface of each contact 29. The vicinity of the vertical portion 31a of the end portion 31b is in contact with the bottom surface of the groove 35, and the terminal 31 is positioned above the terminal 31.

The bottom surface of the main body 21 is arranged on the wiring board 13, and the connection edges 32 of the terminals 31 are soldered to the lands 14. As shown in FIG. 3, a shield cover 38 that covers the main body 21 and the terminal holding portion 24 is covered as necessary, and the mounting legs 39 of the shield cover 38 are inserted into the through holes 41 of the wiring board 13 to connect the connection edges 32. By soldering the mounting legs 39 to the through holes 41 at the same time when the soldering is performed to the land 14, the soldering of the connection edge 32 to the land 14 can be reinforced.

As shown in FIG. 3, the main body 21 is covered with a metal shield cover 38 except for its front surface and bottom surface 21 a. In this electric component, the shield cover 38 is firmly fixed to the wiring board so that the electric component main body 21 can be firmly fixed to the wiring board. Therefore, the mounting leg 39 protruding downward from the bottom surface 21a of the electric component body 21 is integrally formed on the bottom surface of the shield cover 38.

The mounting leg 39 is a cylindrical body having an axis substantially perpendicular to a surface including the bottom surface 21a of the electric component body 21, that is, an axis substantially parallel to the protruding direction of the mounting leg. In this example, since the shield cover 38 is formed by pressing a metal plate, a part of the square shape of the metal plate is bent into a cylindrical shape to form the mounting leg 39. Accordingly, both side edges 39a and 39b of the rectangular portion are folded so as to approach each other or overlap each other.

It is preferable that the cylindrical body of the mounting leg 39 constitutes a part of a conical body whose diameter is gradually reduced downward. Further, in this example, a press-fitting claw 43 is integrally formed in the vertical middle of one side edge 39b of the cylindrical body of the mounting leg 39 that is folded. The press-fitting claw 43 is a triangular claw that projects outward from the cylinder of the mounting leg 39 and has a smaller projecting amount toward the side edge 39b toward the lower side, and is a claw that catches when pulled upward.

With such a configuration, when other electric components are surface-mounted on the wiring board 13, this electric component 20 is also arranged at the same time and the mounting legs 39 are inserted into the through holes 41 of the wiring board 13. At this time, it is preferable that the mounting leg 39 is press-fitted into the through hole 41. Even if it is not so, the outer peripheral surface of the mounting leg 39 should be as close as possible to the inner peripheral surface of the through hole 41. After that, the whole is heated to melt the solder paste. At this time, at the time of printing the solder paste, the solder paste embedded in the through hole 41 and the solder paste in the periphery thereof are melted and penetrate between the inner peripheral surface of the through hole 41 and the outer peripheral surface of the mounting leg 39 so as to penetrate both sides. The faces are glued together with solder 45. Therefore, the mounting leg 39 is firmly fixed to the through hole 41.

In the above description, the invention is applied to the connector, but it can be applied to electric parts in general. The rear extension end 31b may be omitted and the lower end edge of the vertical portion 31a may be used as the connection edge 32.

[0017]

[Effect of device]

 As described above, according to the present invention, the plate surface of each part of the terminal 31 is perpendicular to the bottom surface 21a of the main body, that is, there is no bending in the direction perpendicular to the bottom surface 21a, and the punching processing is not necessary for the bending processing. Since it can be easily performed with high accuracy, the connection edge 32 is always in the correct position and shape with respect to the main body, and is exactly parallel to the bottom surface 21a, which is stable when the main body is placed on the wiring board and the land. The connecting edge 32 is in parallel contact with 14 and stable and strong soldering can be performed.

Since the connection with the land 14 is the connection edge 32, that is, the thickness on the plate surface of the terminal, the spread of the connection solder with the land is narrow, and the terminal interval and the land interval can be narrowed. Since the mounting leg of the present invention is used to form a tubular shape, when surface mounting is performed together with other components on the wiring board, the mounting leg inserted into the through hole and the through hole are separated from each other. The solder paste melts and enters, the entire peripheral surface of the mounting leg and the through hole are soldered, and the soldering area is wide, and they firmly adhere to each other. Therefore, it is not necessary to solder the mounting legs in a separate process other than the surface mounting process, which simplifies the mounting process.

When the press-fitting claw 43 is provided on the mounting leg 39 as in the above-described embodiment, when the mounting leg is press-fitted into the through hole, the press-fitting claw is pressed even if a force in the direction of the mounting leg is removed from the electronic component. 43 is engaged with the through hole, making it more difficult to pull out. Further, by using the cylindrical mounting leg 39 of the shield cover, the cylindrical mounting leg 39 of the shield cover is attached to the through hole 41 provided in the wiring board 13 during the soldering work of the main body 21 to the wiring board 13. By press-fitting, the main body can be temporarily fixed to the wiring board and the workability of soldering work can be improved.

Further, the provisional fixing action makes it possible to easily align the connection edge 32 of the terminal with the land. By using the mounting legs 39 of the present invention, the firm fixing of the main body 21 to the wiring board is further ensured.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of FIG.

FIG. 3A is a perspective view showing an embodiment of the present invention, and B is a view shown in FIG.
2 is a plan view of a cross section taken along line AA of FIG. 3, C is a front view of FIG.

FIG. 4 is a perspective view showing a conventional electric component.

Claims (2)

[Scope of utility model registration request] 1. An electric component having a plurality of plate-shaped terminals protruding from a main body, wherein one edge of a protruding end portion of each terminal is a connecting edge located near a bottom surface of the main body and on a plane parallel to the bottom surface. The electric component is characterized in that the plate surface of each part of each terminal is a surface in a direction perpendicular to the plane. 2. A metal mounting leg for fixing the main body to a wiring board is projected downward from a bottom surface of the main body, and the mounting leg is a cylinder having an axis substantially parallel to the projecting direction. The electrical component according to claim 1, wherein the electrical component is a strip.