JPS6214615Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a jack having a spring that reinforces the springiness of the movable contact piece.

Some jacks have a structure in which a movable portion of a movable contact piece is driven to be deflected by insertion and removal of a plug into and from the main body, and a reinforcing spring is provided to reinforce the springiness of the movable contact piece. Fig. 1 shows the structure of a conventionally used jack equipped with this type of reinforcing spring. It is made as a molded product. One end of the case 1 is integrally closed with a front plate 2, and a center hole 3 is formed around the center of the front plate 2.
A metal tube 4 into which a plug is inserted is attached to the. That is, a part of the metal tube 4 is inserted into the center hole 3,
The inner end portion thereof is pushed outward and caulked, and at the same time, the ground plate 5 arranged on the front side of the front plate 2 is held between the metal tube 4 and the front plate 2. A ground terminal 6 is extended to the ground plate 5.

A movable contact piece 7 bent into a substantially U-shape is disposed within the case 1. One leg of the movable contact piece 7 is disposed, for example, along the bottom plate 8 of the housing 1, in contact therewith as necessary, and is formed on opposite sides of the side plates 9 and 10 of the housing 1. guide groove 11,
12, both side edges 13 and 14 of the contact piece 7 are guided through the contact piece 7. A fixed contact 16 is provided that is in elastic contact with the other leg of the movable contact piece 7 on the side opposite to the bottom plate 8, that is, on the side of the top plate 15. The fixed contact 16 is, for example, a metal plate bent into an L-shape, one end of which is inserted into a guide groove 17 formed in the rear end of the side plate 9 of the case 1, and formed in the side plate 10 at the bent position. The fixed contact 16 is inserted into the cut groove 18 and held in the case 1 across the grooves 17 and 18, and the fixed contact 16 is led out to the outside.
The ends of the terminals 19 are bent at right angles on the outer surface of the side plate 10 to form terminals 19. A coil spring 20 is interposed at a position on the bottom plate 8 between the legs of the movable arm 7, so that the legs of the movable arm 7 are biased apart from each other and opened.

A stopper 23 for holding the movable contact piece 7 to the case 1 is attached to the bottom plate 8 at a position substantially opposite to the fixed contact 16, and a coil spring 20 is attached to the stopper 23.
Means are provided for positioning one end of the. 1st
In the embodiment shown in FIGS.
3, an insertion hole 24 is formed at a position in the bottom plate 8 of the case 1 where the movable contact piece 7 faces, and a hole 25 is formed in the movable contact piece 7 opposite to this. These holes 24 and 25 are, for example, rectangular, and the stopper 23
are fitted into the holes 24 and 25. At the inner end of the stopper 23, retainers 26 and 27 protrude on both sides to prevent it from coming off from the hole 25. In this way, the stopper 23 is fitted and attached to the casing 1. Due to this attachment, the movable contact piece 7 cannot be displaced at least along the bottom plate 8, and its position is maintained. Also, as in this example, the guide grooves 11, 12
When the edges 13 and 14 are passed through, the surface of the bottom plate 8 is also positioned in the vertical direction, and the movable contact piece 7
is fixed to the housing 1 so that it cannot move. Further, a positioning protrusion 28 is integrally formed in the center of the inner end of this stopper 23, and one end of the coil spring 20 is wound around this protrusion 28, that is, the inner end of the coil spring 20 is wound inside the ring. A protrusion 28 is inserted into the coil spring 20 to position the coil spring 20 and prevent it from coming off. At the other end of the coil spring 20, the locking part 29 pushed out from the movable end of the movable contact piece 7 is inserted into the ring at the end of the coil spring 20 and positioned in the same way, and is prevented from coming off. It is configured.

However, in this conventional jack, the springiness of the movable contact piece 7 is reinforced with a coil spring;
If the plug is repeatedly inserted and removed, the movable contact piece 7 may be deflected and twisted. If such displacement and twisting occurs in the movable contact piece 7, there is a possibility that the movable contact piece 7 will eventually become displaced due to this displacement and twisting, and the normal switching operation between the movable contact piece 7 and the fixed contact will not be performed.

This invention solves the problems with conventional jacks with reinforcing springs, and a piece to prevent excessive deflection of the movable contact piece is integrally formed with the reinforcing spring, making it possible to realize smooth operation and long-life operation. It provides a jack.

According to this invention, the movable part of the movable contact piece of the jack is deflected and driven when the plug is inserted into and removed from the main body. The main body holds an auxiliary body integrally formed with a vertical piece that prevents the displacement of the movable part of the movable contact piece from exceeding a predetermined value.

Hereinafter, the jack of this invention will be explained in detail based on its embodiments using the drawings.

FIG. 4 shows the structure of an embodiment of this invention, in which the movable contact piece 7 is positioned on the bottom plate 8 of the case 1, as in the case of the conventional example shown in FIG. The edges on both sides of the part are the guide grooves 11 of the casing 1.
and 12 to fix the movable contact piece 7 to the case 1, and the auxiliary body 30 is attached between the movable contact piece 7 and the bottom plate 8. This auxiliary body 30 has a shape, for example, as shown in FIG.
The end of the other side bent at right angles to the vertical piece 31 is bent toward the vertical piece 31 to form an inclined portion 32 . The width of this inclined portion 32 in the longitudinal direction is set to be slightly narrower than the width of the vertical piece 31 in the longitudinal direction. The auxiliary body 3 is located approximately at the center of the vertical piece 31 of this auxiliary body 30 on the inclined part 32 side.
A reinforcing rib 33 is formed so as to straddle the bent portion of the vertical piece 31, and the vertical piece 31 is reinforced in its length direction and in the direction of rotation around the periphery of the bent portion to provide a rigid structure.

At a position facing the inclined portion 32 of the auxiliary body 30, the width of the auxiliary body 30 is expanded at both side edges to form insertion pieces 34-1 and 34-2. Ends of the insertion pieces 34-1 and 34-2 on the vertical piece 31 side are respectively slightly extended outward to form projecting engagement pieces 35-1 and 35-2. Grooves 36-1 and 36-2 are formed at positions corresponding to the insertion pieces 34-1 and 34-2 of the side plates 9 and 10, respectively.
At the side end, grooves are formed at positions corresponding to the engaging pieces 35-1 and 35-2, respectively.
The shape is deepened so as to be engageable with the engagement piece 5-2 and engageable with the engagement piece 35.

Insert the insertion pieces 34-1 and 34-2 into the grooves 36-1 and 36-2, respectively, and insert the engagement pieces 35-1 and 35-2 into the ends of the grooves 36-1 and 36-2 on the front plate 2 side, respectively. Grooves 36-1 and 36-2 in the section
The auxiliary body 30 is engaged with the deepened groove of the auxiliary body 30.
is fixedly disposed between the bottom plate 8 and the movable contact piece 7. In this arrangement state, the inclined portion 32 of the auxiliary body 30 comes into contact with a part of the movable contact piece 7, reinforcing the spring action of the movable contact piece 7, and fixing the movable contact piece 7 when the plug is not inserted. It is deviated toward the contact 16 side.

When the plug is inserted into the jack, the tip of the plug pushes the movable contact piece 7 down toward the bottom plate 8 side.
Therefore, the movable contact piece 7 applies its own spring force to the auxiliary body 30.
moves toward the bottom plate 8 against the biasing force reinforced by the elasticity of the inclined portion 32, and the movable contact piece 7 and the fixed contact 16 release their contact.

The height of the vertical piece 31 of the auxiliary body 30 from the movable contact piece 7 located on the bottom plate 8 is the height of the movable contact piece 7 at the position where the movable contact piece 7 moves and the movable contact piece 7 and the fixed contact 16 are separated. It is set so as to be in contact with the surface on the bottom plate 8 side of 7. Therefore, when the plug is inserted, the movable contact piece 7 moves a predetermined distance, and the movable contact piece 7 and the fixed contact 1
6 are dissociated from each other, further displacement of the movable contact piece 7 is prevented. At the same time, the movement of the inclined portion of the auxiliary body 30 is also stopped at that position.

In this way, in the jack of this invention, the movement of the movable contact piece 7 and the inclined portion of the auxiliary body 30 does not occur beyond the position where the switch operation is performed. High-precision operation is possible without the occurrence of lag, and its operating life is significantly extended. Furthermore, since the vertical piece 31 and the inclined part 32 are integrally formed on the auxiliary body 30, the entire body can be made smaller and a more rigid structure can be realized.

In the embodiment shown in FIG. 4, a structure is shown in which the movable contact piece 7 and the auxiliary body 30 are each independently fixed to the side plates 9 and 10 of the case 1, but only the auxiliary body 30 is attached to the side plate. As a structure that can be fixed to the side plates 9 and 10, it is also possible to realize a structure in which the auxiliary body 30 is fixedly disposed on the side plates 9 and 10 so that the movable contact piece 7 is held down on the bottom plate 8.

In FIG. 7, the same parts as in FIG. 6 are denoted by the same reference numerals, and the configuration thereof is shown. This is an auxiliary body 30 used in the second embodiment of this invention, and in this example, a substantially rectangular plate is shown. A shaped spring material is bent at right angles to the plate surface at both edges, and its ends are further extended along the bent surfaces, and the extended ends are formed into a roughly semicircular shape. Vertical pieces 31-1, 31-2
It is said that

The auxiliary body 30 consists of these vertical pieces 31-1, 31
On the side opposite to -2, the width is slightly narrowed and bent toward the vertical pieces 31-1 and 31-2 to form an inclined portion 32. This inclined portion 32
An insertion piece 34- is formed by cutting out the vicinity of the side edge of the surface of the auxiliary body 30 facing the end of the auxiliary body 30 and bending it outward at right angles to the surface on which the vertical pieces 31-1 and 31-2 are formed. 1 and 34-2 are formed. When the insertion pieces 34-1 and 34-2 are cut and bent outward, the surface located on the bottom plate 8 side is on the same plane as the surface located on the bottom plate 8 side of the auxiliary body 30. Set. These insertion pieces 34-1, 34
-2's vertical piece portions 31-1, 31-2 side ends are further extended outward to engage the engaging pieces 35-1, 35-2.
It is said that

The auxiliary body 30 having the shape shown in FIG. By being fixed at 10,
The movable contact piece 7 is pressed down and fixed to the case 1 together with the auxiliary body 30.

FIG. 8 shows an auxiliary body 30 used in the third embodiment of this invention, with the same reference numerals attached to the same parts as in the other embodiments. A shaped spring material is cut and raised on the plate surface. That is, a rectangular plate-shaped spring material is cut into a substantially rectangular shape with one edge connected on its surface. The part side of the cut-up piece connected to the plate-like spring material is an inclined part 32,
The end side of the cut and raised piece is bent at a substantially right angle to the plate surface of the rectangular plate-shaped spring material to form a vertical piece 31. In this third embodiment, the vertical piece 31 is pushed in by inserting the plug, and the end of the vertical piece 31 comes into contact with the fixed part of the main body, thereby performing a stopper operation.

Reinforcing ribs 33 are formed at approximately the center of this vertical piece 31 so as to sandwich the bent portion, and the vertical piece 31 is reinforced and solid in its length direction and in the direction of rotation around the periphery of the bent portion. It is said to have a unique structure. Approximately at the center of both outer side edges of the rectangular plate-shaped spring material, a portion of the plate surface is extended outward to form engaging pieces 35-1 and 35-2.

The width in the longitudinal direction of the plate surface on which the cut-out portion of the rectangular plate-shaped spring material is formed is set to be slightly larger than the inner circumferential interval of the bottom plate 8 of the case 1. The side plates 9 and 10 of the case 1 are provided with both side edges of a rectangular plate-shaped spring material and engaging pieces 35-1 and 35 formed on the side edges.
-2 is inserted into the groove, and the auxiliary body 30 is fixed to the case 1 by this groove. The movable contact piece 7 is fixed to the case 1 independently, or is fixed to the case 1 by being held down on the bottom plate 8 by an auxiliary body 30.

The shapes of the insertion pieces and engagement pieces formed on the auxiliary body 30 that fix the auxiliary body 30 and the side plates 9 and 10 of the casing 1, and the grooves formed on the casing 1 into which these are inserted and engaged are determined by each implementation. The present invention is not limited to the example shown, and for example, only an engaging piece may be formed on the auxiliary body 30, and this engaging piece may be engaged with a corresponding groove of the case 1.

As explained in detail above, according to this invention, due to the existence of the auxiliary body, excessive deflection strain on the movable contact piece does not occur when inserting the plug.
In addition, the spring action of the movable contact piece is reinforced by the auxiliary body, so that the pressing force against and separation from the fixed contact is strong, enabling high precision operation over a long period of time, and significantly extending its operating life. As described above, this invention makes it possible to reduce the number of component parts, simplify the manufacturing process, and provide a jack that can operate with high precision and has a compact and robust structure.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing the structure of a conventionally used jack, FIG. 3 is a perspective view showing the structure of a movable contact piece used in a conventionally used jack, and FIGS. Figure 5 shows the structure of an embodiment of the jack of this invention, Figure 6 shows the structure of an auxiliary body used in the embodiment of the jack of this invention, and Figures 7 and 8 respectively FIG. 6 is a diagram showing the structure of an auxiliary body used in the second and third embodiments of the jack. 1: Case, 7: Movable contact piece, 8: Bottom plate, 16: Fixed contact, 30: Auxiliary body, 31: Vertical piece, 32:
Slope.

Claims (1)

[Scope of Utility Model Registration Claims] A jack in which a movable contact piece is fixed to a main body, and a movable part of the movable contact piece is driven to be deflected by insertion and removal of a plug into the main body, wherein an auxiliary body is connected to the main body and the movable part. The auxiliary body includes an inclined part having elasticity that reinforces the spring action of the movable part of the movable contact piece, and a biasing part of the movable part of the movable contact piece due to insertion of the plug. 1. A jack, characterized in that it is integrally formed with a vertical piece that prevents the position from exceeding a predetermined value.