JPS6343731Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention uses a short and small coil spring movable contact piece, and has a mechanism in which the coil surface of the movable contact piece is directly brought into contact with and separated from a fixed contact piece by means of an insertion plug.
In addition to extremely simplifying the jack structure, it absolutely guarantees reliable and stable switching performance of the movable contact piece to the fixed contact piece, and also eliminates unstable fitting to the plug, and simplifies the mechanism. The object of the present invention is to provide an ultra-compact jack that has excellent performance and can be mass-produced at low cost by simplifying assembly and manufacturing and making ultra-miniaturization possible.

The movable contact piece of a jack using a conventional coil movable contact piece has a movable line portion formed with a bent shape such as a chevron shape, which is extended from the coiled portion to the tip end, and the tip of the extended movable line portion Since only the movable contact piece has a switching effect on the fixed contact piece when the plug is operated, the bending of the movable contact piece requires precision, and manufacturing is troublesome and workability is poor. Failure to connect and disconnect the contact piece is likely to occur, making the switch performance unstable, and the coil contact piece that extends the movable wire portion is long and large, so the mounting space becomes large, and the jack case becomes large and extremely large. A small product is not available, and there are other drawbacks such as unstable switch performance due to slight deformation or misalignment of the movable contact piece or loosening of the spring. Therefore, the present invention reliably eliminates all of the above-mentioned drawbacks of the conventional switch. This will achieve the above objectives.

An example of implementing the present invention will be described below with reference to the drawings.

The plug is open at the rear and has a circular or square hole inside (in the figure, the cavity 1 is a circular hole, the front wall 2 is used as a partition wall, and the insertion hole 3 into which the plug electrode rod a is inserted is provided in the center). A male hook is provided with a circular hole 6 extending from the insertion part 4 of a rectangular insulating case 5 having a protruding insertion part 4 to the outer periphery of the case 5 and opening into the insertion hole 3 at the center of the front part. A male hook-shaped earthing fitting 10 is formed by forming small window holes 8, 8' for locking the rear part to the upper and lower opposing locking protrusions 7, 7' of the case 5, and having a bent terminal leg 9. , each small window hole 8,
8' to fix the wire to the center of the front wall 2, and pass through the small circular hole 11 through which the wire is passed from the insertion hole 3 to the cavity 1, and to one side of the cavity 1. narrow jugular groove 12
A slender groove 13 that partially opens on the bottom of the case is bored outwardly from the opening, and a slender neck 1 is formed on one side.
4 and a donut-shaped fixed contact piece 17 formed by bending a flat plate part 16 that fits into the elongated groove 13 with a terminal leg 15 provided below on the outside thereof, is attached to the back surface of the front wall part 2.
The thin neck portion 14 is fitted into the narrow neck groove 12 and the flat plate portion 16 is fitted into the elongated groove 13 and fixed, and the tip of the conductive coil is erected in the empty space 1 with a part of the tip facing the center of the ring. Bend it, and then turn its tip forward to form a horizontal line portion 18 with a required length that protrudes into the insertion hole 3 through the small circular hole 11 of the front wall 2, and the rear end. A coil spring movable contact piece 21 is formed by bending each terminal leg 20 that passes through the through hole 19 at the bottom of the case.
, the horizontal line part 18 penetrates and protrudes from the small circular hole 11 into the insertion hole 3, and the terminal leg 20 penetrates through the through hole 19, and the front circular ring surface 22 of the coil part is inserted into the fixed contact piece 1.
The opening of the case 5 is covered with a cover plate 23, which is fitted with a spring so as to make spring contact with the case 7.

In addition, as another example, as shown in the example diagram of FIG. 9, the movable contact piece 21 does not have the terminal leg 20, but has only the horizontal line part 18 and the coil part at the front, and has a terminal leg 24 attached. It may be configured to be covered with a metal cover plate 25.

Further, the fixed contact piece 17 is also free to be deformed in various ways depending on the shape of the fitting groove except for the donut portion.

Furthermore, the male hook-shaped grounding fitting 10 does not have to be extended to the case 5, but may be in the form of a short cover that is attached to the outer periphery of the insertion portion 4, if necessary. The fixing means is also not limited.

And the plug P for the jack of the present invention.
As shown by the imaginary line in FIG. 4, there is a female hook-shaped electrode fitting 26 that fits into the head of the male hook-shaped grounding fitting 10, and a movable contact piece 22 that is inserted into the insertion hole 3 of the jack. An electrode rod a having a length that pushes against the tip of the horizontal line portion 18 is provided in the center.

In the figure, reference numerals 27 and 27' indicate locking protrusions provided on the side surface facing the case for locking the small window hole 28 of the cover plate 23. However, any other deposition configuration may be used.

Furthermore, the case 5 is not of the rear-opening type, but can be applied even if the case 5 has an opening on one circumferential side surface, as long as the lid plate is attached in a form corresponding to the opening.

Since the present invention is constructed as described above, the coil spring movable contact piece 21 is inserted into the cavity 1 from the rear opening of the insulating case 5, and the horizontal line portion 18 at the tip is inserted into the small space at the center of the front wall portion 2. If the terminal leg 20 at the rear end is passed through the circular hole 11 to the outside of the case through the through hole 19 and the case opening is covered with the cover plate 23, the movable contact piece 21 can be connected to its coil portion. The front circular ring surface 22 of the front ring surface 22 is in direct spring contact with the fixed contact piece 17 over a wide area due to the force of the coil spring. Therefore, even if there are some differences in the length of the coil spring or the spring pressure, there is no possibility of poor contact. completely disappeared, and the horizontal line part 1 at the tip
8 passes through the small circular hole 11 and protrudes into the insertion hole 3 of the insertion portion 4 by a required length. Moreover, the jack of the present invention has a structure in which the case 5 is inserted from the insertion portion 4.
Since the ground fitting 10 with a male hook-shaped head is attached to the outer periphery of the part, if this head is fitted to the corresponding female hook-shaped electrode fitting 26 on the side of the plug P, The hook-shaped metal fittings 10 and 26 are tightly fitted to each other in the same manner as hook fitting,
The fitted state is secure and strong, and no loose play occurs at all. Therefore, the plug electrode rod a at the center of the plug P side is accurately inserted into the insertion hole 3 on the jack side without any loose movement, so that the tip of the horizontal line portion 18 of the movable contact piece 21 inside the insertion hole 3 is pushed up. When the coil portion of the movable contact piece 21 is pressed, the coil portion of the movable contact piece 21 is contracted by the spring, and the front circular ring surface 22 is reliably separated from the fixed contact piece 17 (see FIG. 8). The switching action of the piece 21 is completely reliable. At this time, since the horizontal line portion 18 is penetrated through the small circular hole 11, there is no fear that the horizontal line portion 18 will be guided by the hole 11 and bent when pushed.

Then, when you remove the plug from the P side, the horizontal line part 1
8 is released, and the coil spring portion comes into reliable contact with the fixed contact piece 17 due to the spring force. Note that removal from the plug P is also easy and easy since it involves hook-fitting.

As a result, the present invention allows the coil spring movable contact piece 21 to be inserted into the empty space 1 of the case 5 in a depressed manner and the male hook-shaped grounding fitting 10 to be attached to the outer periphery of the insertion portion 4, so that the plug P side In addition to reliable mating and unmating, the switch performance is reliable and stable.
The mechanism is simple and easy to assemble and manufacture, and the work efficiency is good.The coil part of the movable contact piece 21 comes into direct spring contact with the fixed contact piece 17, so the coil spring part does not need to be short. The horizontal line portion 18 of the movable contact piece 21 is also short, so that the entire case 5 can be made extremely compact, and furthermore, the movable contact piece 21 can be processed somewhat roughly. Also, since the front circular ring surface 22 is in direct spring contact with the wide fixed contact piece 17, it is convenient without affecting the switch performance, and the parts manufacturing and assembly costs are reduced, making it possible to mass produce ultra-compact products with good performance at low cost. Since it involves the expansion and contraction of the coil portion, the spring does not relax over a long period of time, resulting in extremely high durability.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention; Fig. 1 is a front view, Fig. 2 is a right side view, Fig. 3 is a rear view with the cover plate removed, and Fig. 4 is a state in which it is fitted with the plug side. FIG. 5 is a front view of the coil spring movable contact piece, FIG. 6 is a side view of the fixed contact piece, FIG. 7 is a right side view of FIG. 6, FIG. 8 is a partially omitted side sectional view showing a state in which the movable contact piece is pushed by the plug electrode rod, and FIG. 9 is a side sectional view of the cover portion of another example in the case of a movable contact piece without terminal legs. 1... Vacancy, 2... Front wall, 3... Insertion hole, 4
... Insertion part, 5 ... Insulation case, 6 ... Circular hole, 1
0...Male hook-shaped grounding fitting, 11...Small circular hole, 17...Fixed contact piece, 18...Horizontal line part, 21
...Coil spring movable contact piece, 23...Lid plate.

Claims (1)

[Scope of utility model registration request] The insertion part 4 for plug insertion is defined in the front wall part 2. From the insertion part 4 of the insulating case 5 to the outer periphery of the case 5, the space 1 is a circular or square hole in the rear opening protruding from the insertion part 4. A male hook-shaped grounding fitting 10 having a circular hole 6 that opens into the insertion hole 3 of the insertion part 4 is attached,
A small circular hole 11 passing through the wire body is provided in the center of the front wall 2, and a donut-shaped fixed contact piece 17 is fitted through the fitting groove to the back surface of the front wall 2, and a hole 11 is inserted into the cavity 1. On the other hand, the tip of the conductive coil is bent upright at the center of the ring, and the tip is moved forward to the horizontal line portion 18.
The coil spring movable contact piece bent into the small circular hole 1
The horizontal line part 18 is penetrated and protruded into the insertion hole 3 from 1, and the front surface of the coil part is inserted into the fixed contact piece 17 with a spring, and the opening of the case 5 is inserted into the cover plate 2.
A small jack covered with 3 parts.