JPS5931191B2 - mold jack - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a molded jack particularly suitable for being connected directly to a printed circuit.

In the prior art, jacks were typically a stack of multiple spring metal contacts separated by insulation and mounted on one end of a metal frame.

The other end of the frame forms an inlet end and is adapted to receive a plug. The artificial end is then adapted to be attached to the panel. The most common example is found in the telephone industry. As technology has evolved, these jacks have become smaller and mounted much closer to the jack panel. Printed circuit technology was introduced and it was found convenient to slide the printed circuit board into and out of the panel from the jack inlet side. Accordingly, it is common practice to position a large number of printed circuit boards alongside rows of jacks in close proximity. Connections between the jack and the printed circuit board are made with short wires. The wire must be soldered to the back of the jack and then routed to a connection point on the printed circuit board. In order to make such connections, laborious work is required9 and a lot of space is required for such connections. The present invention overcomes the disadvantages of prior art devices discussed above by using a jack in which the spring metal contacts extend laterally out of the housing for direct connection with the printed circuit board as will be described below. It's about solving. Briefly, in the present invention, the jack is formed by a molded plastic housing, and the housing is itself mounted to the side of the printed circuit board.

Small metal contacts or springs within the jack make electrical contact with a plug inserted into it. These springs have lugs that extend from the springs through holes in the jack housing directly to appropriate circuit connection holes in the printed circuit board. Therefore, there is no need for a separate wire between the printed circuit board and the jack. Configure the jack so that all springs are inserted from one side of the jack (this side is opposite the circuit board). The springs are held in position within the housing by slots formed in the side walls. These slots receive projections formed on the spring in locking relationship to hold the spring in position to receive the plug. SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a jack that not only can be mounted directly on a printed circuit board, but is also simple in construction, easy to assemble, and low cost. Hereinafter, the details of the present invention will be explained based on the drawings.

The jack housing 10 of the present invention has a longitudinal side wall 16.
and 18 and two small end surfaces 12 and 14 connected together by a wall 20.

The end surface 14 or inlet end 14 is provided with slots 22 and 24 on each side and a slot 23 at the bottom to accommodate the jack in the first
This facilitates mounting on the front panel 25 as shown in Figure 0. In FIG. 10, the jack of the present invention is shown to scale mounted to printed circuit board 26, with printed circuit board connection lugs 27 mounted through circuit board 26.

As shown in FIG. 10, the inlet end 14 has a front
It is attached to panel 25 by slots 22, 23 and 24. 1-4, the plug is inserted into jack 10 through hole 28 in inlet end 14. In FIGS. As the plug passes through hole 28, it passes through a pair of curved indentations 30.
Once the plug is in the housing, it contacts a number of springs held in slots in the housing. The position of each spring will be described later. Each spring is described according to the circuit function it normally performs in telephone jack and plug circuits.
In FIG. 5, the ring spring 34 is placed within the housing as shown in FIG. 1 in approximately the position shown in FIG. has been done. A ring spring 34 is located along the inside of the bottom wall 20 and a printed circuit board connection lug 27R is located in the hole 36.
A pair of locking tabs 38 and 40 slide into a pair of slots 42 and 44, respectively.

1 formed on tabs 38 and 40 when fully inserted.
A set of projections 45 positions and secures the ring spring.
Importantly, tabs 38 and 40 are bent slightly so that when ring spring 34 is pushed downwardly into slots 42 and 44, the ring spring moves against end surface 12 and assumes the correct position. That's what I did instead. Figures 6-9 show that all spring metal contacts have slightly inwardly bent protrusions to accomplish this locking function. When the plug is inserted into the jack housing,
The ring spring 3 comes into contact with the protrusion 47 of the ring spring 34 .
4 inward, contact 49 breaks circuit with the other contact on the bottom of tab 50 of ring right angle spring 52 shown in FIG. The ring right angle spring shown in FIG.
and 58.

Printed circuit board connection lug 27RN extends through hole 60 in bottom wall 20. Ring right angle spring 52 has tabs 57 and 58 bent forward slightly as described in connection with the ring spring tabs shown in FIG. In FIG. 6, the lower projection has surface edges 62 and 63;
These are beveled at a steep angle so that when the contacts are extended into the slots in the housing, the top edges of these slots
Initially, contact is made with the spring at the point indicated at 64 rather than at the tip indicated at 65. Therefore, this steep angle of the edges 63 and 62, combined with the forward bend described above, ensures that the spring 52 enters the slot smoothly and the corner of the protrusion 67 is against the wall of the slot. Ensures fixing. Figures 5-9 show that all of the protrusions used on all of the springs have a steep angle on the lower protrusion. The use of this slight inward bend in conjunction with... indicates the use of this slight inward bend to ensure initial full contact with the entrance end of the slot of the housing. Contact to ground can be made by the sleeve spring shown in FIG.

This spring is mounted on the opposite side of the ring spring 34 from the plug. This position allows the springs on both sides of the plug to be balanced to prevent the plug from being pushed off center. This spring balance provides the advantage that the jack maintains good contact and is well used even when the plug inlet hole wears considerably. Sleeve spring 70 is attached to side wall 18
a connecting tab 72 (having a plurality of slightly curved protrusions) that fits into a slot 74 in the side wall 16 and another tab 76 that extends into a slot 78 in the side wall 16. . Printed circuit connection lug 2 extending from the bottom of tab 76
7S passes through hole 80. The top of sleeve spring 70 forms a barb 82 for contacting the plug. In a telephone circuit, the plug may have a third circuit.

Contact for this circuit is provided by a tip spring 84 shown in FIG. 8 and a tip right angle spring 86 shown in FIG. Slightly bent mounting tabs 87 and 88 on tip spring 84 fit into slots 89 in wall 18 and lugs 27T fit into holes 90. Insertion of the plug causes the barb 92 to contact the plug and push the tip spring 84 slightly rearward, thereby causing the contact 94 to break circuit with the tip right angle spring 86 shown in FIG. Chip right angle spring 86
is the ring spring 3 in the slots 96 and 97 in the side wall 16.
It is attached above 4.

The bottom connecting lug 27TN of the tip right angle spring 86 is connected to the hole 98.
extends through. The contacts 94 of the tip right angle spring 84 are normally resting against the tabs 100 of the tip spring 86. Another set of slots 102, holes 104 are provided in the housing 10 for other springs that may be provided as desired.

A cut-out hole 106 is provided in the wall 20 to allow room for the ring spring 34 to move downwardly during insertion of the plug. A cutout window 108 for the same purpose is provided in the side wall 18 to allow the tip spring 84 to bend laterally. A small projection 110 is formed on the inside of the wall 16 on which the plug can rest under the lateral force provided by the tip spring 84. A series of three small protrusions 112...approximately ?? from circuit board 26 to facilitate soldering. An inch (approximately 0.511 inches) is formed on the outside of the bottom wall 20 to hold the jack housing 10 apart.

All mounting slots...extend substantially perpendicular to the longitudinal axis of the housing.

All slots therefore open into the top of the housing on the side opposite the printed circuit board. This provides the advantage that all spring elements can be inserted from one side of the housing, while the housing body is constructed in such a way that it can be easily molded. The slot can be shaped other than shown to accommodate a spring element.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the jack housing, Figure 2 is a perspective view of the jack housing.
3 is a sectional view taken along line 33 of FIG. 2, FIG. 4 is a bottom view of the one shown in FIG. 1, and FIGS. FIG. 10 is a perspective view of the jack housing showing the manner in which the jack is mounted directly to the front panel and to the circuit board. 10 in the figure...jack housing, 12,1
4... End surface, 28... Hole, 34,
54, 70, 84... Spring contact, 27...
...Tab, 42, 44, 54, 55, 74, 89, 96
, 97, 102... slot, 36, 60, 80,
90, 98, 104... hole.

Claims (1)

[Claims] 1. A molded jack suitable for direct connection on the bottom side to a printed circuit board, comprising an elongated molded non-conductive housing having a longitudinal axis and extending along the longitudinal axis at each end of the housing. having first and second generally parallel end faces generally perpendicular to the axis;
and a second end surface connected to each other by first and second elongated generally parallel sidewalls and a third elongated sidewall intermediate the first and second sidewalls, the first, second, and each of three side walls extending between the first end surface and the second end surface and parallel to the longitudinal axis, and the housing having an inlet hole in the first end surface. , thereby receiving by a plurality of spring metal contacts a plug inserted along the longitudinal axis into a space between the first, second, and third side walls and the first and second end faces; A plurality of spring metal contacts are mounted within the housing by a plurality of vertical slots perpendicular to the third sidewall, with at least some of the plurality of slots being in the first and second sidewalls of the housing. The plurality of slots are formed generally perpendicular to the longitudinal axis and are open at ends remote from the third sidewall to receive the spring contacts, the spring contacts having lugs extending therefrom, and the plurality of slots having lugs extending therefrom; extends through the bottom of the housing to contact the circuit board, and the plurality of spring contacts includes at least one pair of counterbalanced spring contacts, the pair of counterbalanced spring contacts including at least the first a first spring contact mounted in a vertical slot in a side wall of the housing for urging a plug inserted into the housing through the inlet hole, and a first spring contact mounted in a vertical slot in at least the second side wall of the housing; a second spring contact that forces the other side of the plug inserted into the housing through the inlet hole in a direction opposite to the force of the first contact to balance the force of the first spring contact; and the plurality of spring contacts further include a side surface of a plug mounted in at least one of the plurality of vertical slots and inserted into the housing through the inlet hole, the first and second spring contacts. In a direction perpendicular to the direction in which the contact presses the plug,
a molded jack comprising a third spring contact for pressing.