JPH0348635B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a soldering grounding structure between a SURF S-mount connector and a printed circuit board.

[Prior Art] In recent years, as a means of mounting connectors on printed circuit boards of electrical and electronic equipment, the legs of the contacts arranged on the connector are directly soldered to pads formed on the printed circuit board, and electrical There has been an increase in the number of so-called surf S-mount connectors that can be used for physical connection and mechanical fixation at the same time. That is, Figure 4a
As shown in the figure, the surf S mount connector (hereinafter referred to as the connector) 5 has contacts 7 arranged in two rows along both sides of the insulator 6 in the longitudinal direction and fixed by insert molding, and the same contacts 7 are arranged on the bottom surface of the insulator 6. It is constructed by attaching a fixing plate 8 shown in FIG. b. The fixing plate 8 is made by punching a metal plate into a predetermined shape and then bending the metal plate. That is, the fixing plate 8 is formed into a rectangular shape with dimensions slightly smaller than the bottom surface dimension of the insulator 6, and extends upward from one longitudinal side edge 8a at right angles to the plate surface of the fixing plate 8. A plurality of locking legs 9 are cut and raised, and the locking legs 9 are arranged in a line parallel to the side edge 8a. A locking piece 9a that protrudes toward the side edge 8a is provided at approximately the center of the locking leg 9.
The fixing plate 8 is locked and fixed within the insulator 6, which will be described later, by means of a. The insulator 6 is formed into a rectangular block made of an insulating material, and a through hole 10 is formed in the center of the upper surface of the insulator 6 so as to pass through the lower surface of the insulator 6.

The through hole 10 is provided with a locking step portion 10a for engaging the locking piece 9a of the locking leg 9.

The contact 7 is located on the upper surface of the insulator 6 through the through hole 10.
Contact portions 7a are arranged on both sides of the insulator 6, and leg portions 7b are arranged on both sides of the insulator 6. Next, in order to attach the fixing plate 8 to the insulator 6, the locking leg 9 is directed upward, and the locking piece 9a of the locking leg 9 is aligned to face the locking step 10a of the through hole 10. , insert the locking piece 9a of the locking leg 9 into the through hole 10 from the lower surface of the insulator 6 while bending it. When the upper surface of the fixing plate 8 is inserted until it contacts the lower surface of the insulator 6, the locking piece 9a of the locking leg 9 elastically returns to engage with the locking step 10a of the through hole 10, and is fixed. Plate 8 is fixed to insulator 6. In this state, the lower surface of the fixed plate 8 and the insulator 6
The dimensions of each part are set so that they are on the same plane as the lower surface of the flat part 7c formed on the leg part 7b of each contact 7 that protrudes from both sides of the contact.

On the other hand, as shown in FIG. 3, the printed circuit board 11 has
Fixing pads 11a and 11b are formed for soldering connection to the fixing plate 8 attached to the connector 5 and the flat portions 7c of the contacts 7, respectively. Therefore, the connector 5 is connected to the printed circuit board 1.
1, the lower surfaces of the fixing plate 8 and the flat portions 7c of the contacts 7 are overlapped so that they are in close contact with the fixing pads 11a and 11b of the printed circuit board 11, and then the soldering connections are made and electrical connections are made at the same time. It was mechanically fixed.

[Problems to be Solved by the Invention] As described above, the soldered connection portion of the connector 5 to the printed circuit board 11, which is described on the printed circuit board 11, is subject to an insertion/extraction force when inserted into or removed from a mating connector (not shown). In addition, external force such as twisting is applied during mating, but the fixing pad 1 of the printed circuit board 11
By soldering the fixing plate 8 to 1a, the connection strength between the connector 5 and the printed circuit board 11 is increased. However, in the conventional soldering connection structure, the connector 5 is mounted on a printed circuit board to which the fixing pad 11a is wired to the ground circuit, and the connector 5 is connected to the mating connector attached to the cable including the ground wire and the ground circuit of the printed circuit board. 5, the ground wiring of the connector was extremely troublesome.

The present invention has been made for the purpose of solving the above-mentioned drawbacks, and by providing a grounding contact that contacts the grounding contact of the mating connector integrally on the fixed plate, the mechanical connection between the connector and the printed circuit board is improved. The objective of the present invention is to provide a SURF S-mount connector that not only provides excellent connection strength but also simplifies ground wiring.

[Means for solving the problem] According to the present invention, a contact protrudes from an insulator and is soldered to a printed circuit board, and a contact that is attached to the lower surface of the insulator and soldered to a fixing pad provided on the printed circuit board. In the surf S mount connector, the fixing plate has a grounding contact that protrudes from the top surface of the insulator and comes into contact with the grounding contact of the mating connector, which is bent at right angles to the plate surface and integrated. It was formed.

With the above configuration, when the connector is mounted on a printed circuit board and mated to a mating connector, the mating connector is connected to the fixing plate due to the contact between the grounding contact of the mating connector and the grounding contact of the fixing plate. Connected to the ground circuit of the printed circuit board via. For this reason, when a cable containing a grounding wire is attached to the mating connector, the grounding wire can be easily connected by connecting the grounding wire and the grounding contact, and the mechanical connection between the connector and the printed circuit board can be strengthened. There is also a Surf S mount connector available.

[Example] Hereinafter, an example of the present invention will be described based on the drawings.

FIG. 1 shows a connector 14 as an embodiment of the invention. Most of the configuration of the connector 14 except for the fixing plate 12 is the same as the connector 5 shown in FIG. 4, so the same or corresponding parts as in FIG. 4 will be given the same reference numerals and their explanation will be omitted. That is, the fixed plate 12
1 is the distal end portion of the locking leg 9 of the fixed plate 8 of the conventional example extended further upward, and the extended portion becomes a ground contact 13 having the same shape as the contact portion 7a of the contact 7. Therefore, by incorporating the fixed plate 12 with the grounding contact 13 into the insulator 6,
A contact 7 is located in the longitudinal center of the upper surface of the insulator.
Similarly to the contact portions 7a, the grounding contacts 13 of the fixed plate 12 are arranged in a protruding manner. The connector 14 configured as described above is mounted on the printed circuit board 11 on which the fixing pad 11a is wired to the ground circuit, and a mating connector (not shown) is fitted into the connector 14. Therefore, the grounding contact of the mating connector can be connected to the grounding circuit on the printed circuit board 11 side via the grounding contactor 13, that is, the fixing plate 12. By providing the grounding contact 13 on the fixed plate 12 in this manner, the fixed plate 12 not only has the function of fixing and holding the connector 14 on the printed circuit board, but also has the function of a grounding plate as described above. It turns out.

FIG. 2 shows a connector 22 as another embodiment. The fixing plate 15 attached to the connector 22 is formed by bending both sides of the fixing plate 15 at right angles in the longitudinal direction to form a vertical portion 16 extending upward, as shown in FIG. Furthermore, at the upper end of the vertical part 16,
A plurality of grounding contacts 17 having the same size and shape as the contact portion 7'a of the contact 7' match the arrangement pitch of the contact portion 7'a of the contact 7' provided on the insulator 18, and It is integrally protruded at a position corresponding to the grounding contact of the connector. Furthermore, the opposing distances between the opposing vertical portions 16 of the fixing plate 15 and the opposing distances between the grounding contact portions 17 connected to the vertical portions 16 are also made equal to the row spacing of the contact portions 7'a protruding from the upper surface of the insulator 18. There is.

On the other hand, the lower surface of the insulator 18 is formed with a recess 19 into which the fixing plate 15 is fitted and fixed. The depth of the recess 19 is approximately equal to the thickness of the fixed plate 15, and the recess 19 has holes along both longitudinal walls.
A groove 20 into which the vertical portion 16 of the fixed plate 15 fits is formed. On the upper surface of the insulator 18, contact portions 7'a of the contacts 7' are arranged in two rows in the longitudinal direction, as in the previous embodiment. In that case, a grounding contact 17 is inserted in place of the contact 7' at a location within the row of contact portions 7'a on the upper surface of the insulator 18 and corresponding to the grounding contact 17 of the fixed plate 15. A through hole 21 is provided to penetrate the groove 20 of the recess 19. Therefore, by incorporating the fixing plate 15 into the insulator 18, the grounding contact 17 is arranged on the upper surface of the insulator 18 in the same line as the contact portion 7'a of the contact 7'. Furthermore, the lower surface of the fixing plate 15 fitted into the recess 19 of the insulator 18 is on the same plane as the lower surface of the insulator 18, or slightly protrudes from the lower surface of the insulator 18, and the leg portion 7'b protrudes from the side surface of the insulator 18. It is on the same plane as the lower surface of the flat portion 7'c. The connector 22 configured as described above is fixed to the printed circuit board 11 on which the fixing pad 11a is connected to the ground circuit, and is mated with the mating connector, similar to the fixing plate 12 of the connector 14 described in the previous embodiment. , fixing plate 15
performs a grounding function. It goes without saying that the mechanical connection strength of the connectors 14 and 22 having such a soldered connection structure with the printed circuit board 11 is improved by providing the fixing plates 12 and 15 on the lower surfaces of the insulators 6 and 18. Furthermore, when mating with a mating connector connected to a flat cable or the like containing a grounding wire, the grounding contacts of the mating connector are connected to the grounding contacts 13 and 17 of the fixing plates 12 and 15. By bringing these into contact with each other, the mating connector is connected to the ground circuit on the printed circuit board 11 via the fixing plates 12 and 15. In the above embodiment, the fixing plate 1
Although the grounding contacts 13 and 17 of No. 2 and 15 have the same size and shape as the contact portions 7a and 7'a of the contacts 7 and 7', of course, the grounding contacts 13 and 17 of the mating connectors are contacts 13, 17
can be changed to various dimensions and shapes. Also, the contact portions 7a, 7'a of the contacts 7, 7' and the fixing plates 12, 1
Although the grounding contacts 13 and 17 of No. 5 are pin-shaped, they can be changed to socket shapes.
Furthermore, regarding the mounting structure of the insulators 6, 18 and the fixing plates 12, 15, it is also possible to insert mold the fixing plates 12, 15 together with the contacts 7, 7', for example, and various modifications may be made without departing from the spirit of the present invention. changes can be made.

[Effects of the Invention] As is clear from the above description, the present invention improves the connection strength between the connector and the printed circuit board by attaching the fixing plate to the lower surface of the insulator, and also provides a grounding contact on the fixing plate. As a result, the grounding contacts of the mating connector can be connected to the grounding circuit of the printed circuit board through the fixing plate, so it is possible to provide a SURF S-mount connector that can simplify the grounding wiring.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a surf S mount connector which is an embodiment of the present invention, Fig. 2 a and b are perspective views and sectional views showing other embodiments of the invention, and Fig. 3 is an explanation of a printed circuit board. Figure 4a is a sectional view of a conventional Surf S mount connector, Figure 4b
is a perspective view of a fixed plate. 5, 14, 22; Surf S mount connector, 6, 18; Insulator, 7, 7'; Contact,
11; Printed circuit board, 8, 12, 15; Fixed plate,
11a; Fixed pad; 13, 17; Contactor.

Claims (1)

[Claims] 1. A surf S mount connector having contacts that protrude from an insulator and are soldered to a printed circuit board, and a fixing plate that is attached to the lower surface of the insulator and soldered to a fixing pad provided on the printed circuit board, A surf S-mount connector characterized in that the fixing plate has a grounding contact that protrudes from the upper surface of the insulator and comes into contact with a grounding contact of a mating connector, and is bent at right angles to the plate surface and formed integrally with the grounding contact.