JPH0113295Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a switch equipped with a novel mechanism for bringing contact pieces into and out of contact with each other.

A conventional switch having a movable contact piece and a fixed contact piece formed of a leaf spring utilizes the elasticity of the movable contact piece to bend the contact piece in the direction of contact and separation, thereby making contact with and separating from the mating contact piece. Of course, it is OFF.
In this state, a space exists between the contact points of both contact pieces. However, it is almost impossible to maintain a constant distance between the contacts in this OFF state due to manufacturing accuracy, so it is necessary to set a large distance between the contacts in consideration of safety. Since the amount of deflection of the contact piece increases, it has been difficult to perform the contact/separation operation with a small force. Furthermore, when the contact pieces are connected and separated, no insulator is inserted between the contacts, and a gap remains as described above, so unless the structure is designed so that the contact and separation operations can be completed instantly, However, it was impossible to avoid contact failure due to arcing.

In addition, when conventional switches are equipped with multiple pairs of opposing fixed contact pieces and movable contact pieces (hereinafter referred to as opposing contact pieces), it is difficult to accurately set the timing of engagement and separation for each opposing contact piece. Another problem was that in order to change the timing of contact and separation, it was necessary to replace the switch itself.

The present invention was developed in view of the above-mentioned problems, and its purpose is to allow the contact pieces to move toward and away from each other with a small amount of force, and to greatly reduce contact failure due to arcing. To provide a switch which is equipped with a new and useful contact/detachment mechanism capable of automatically cleaning a contact part and which can accurately and easily set the contact/detach timing for each of a plurality of sets of opposing contact pieces. It is in.

In order to achieve such an object, the present invention consists of a fixed contact piece group consisting of a plurality of fixed contact pieces arranged in parallel, and a plurality of movable contact pieces that face each fixed contact piece and can freely come into contact with the fixed contact pieces. Between the movable contact pieces, the contact portions of the fixed contact pieces and the movable contact pieces that are slidable along the fixed contact piece group in a direction substantially perpendicular to the elastic contact direction of each movable contact piece and that are opposed to each other are arranged on the slide. A thin insulating plate formed with a notch that moves toward and away from the contact is inserted and removed, and the distance from the notch to the contact portion of each fixed contact piece and the movable contact piece is individually set. This is a summary of what has been done, and will be explained in detail below using examples.

Fig. 1 is a partially cutaway exploded perspective view showing one embodiment of the switch of the present invention, and Fig. 2 A and B are respectively
These are cross-sectional views of the same embodiment in an OFF state and an ON state, in which 1 indicates a bottomless switch box, and the top plate 11 of this box is transparent.

Reference numeral 2 denotes a bottom plate that is fitted and fixed to the bottom protrusion 12 of the switch box 1. A plurality of fixed contact pieces 3 constituting a group of fixed contact pieces are buried in parallel in this bottom plate 2. A contact portion 31 of each fixed contact piece 3 is exposed on the upper surface. The terminal portion 32 of each fixed contact piece 3 protrudes from the front side surface of the bottom plate 12 and is bent downward at 90 degrees. Further, concave step portions 21, 21 are provided on both left and right edges of the bottom plate 2, and when the bottom plate 2 is fitted and fixed to the bottom portion 12, the protruding stripes 14, 14 on the left and right side walls 13,
Guide grooves 15, 15 for sliding the insulating thin plate 5, which will be described later, are formed between the insulating thin plates 14 and 14.

4 is a movable contact piece, and a plurality of movable contact pieces are arranged in parallel near the bottom inside the switch box 1 to constitute a movable contact piece group. The bases of these movable contact pieces 4 are embedded and fixed in the rear wall 16 of the switch box 1, and the terminal portions 41 of each movable contact piece 4 protruding from the rear wall 16 are bent 90 degrees downward. These movable contact pieces 4 are made of leaf springs, and the distal end portions on which the grooves are formed are smoothly bent to form contact portions 42 . Thus, the contact portion 42 of each movable contact piece 4 comes into elastic contact with the contact portion 31 of the opposing stationary contact piece 3 due to the elasticity of the movable contact piece 4 when the thin insulating plate 5 described below is not inserted. It is configured.

The insulating thin plate 5 is made of a synthetic resin such as polytetrafluorothene or ceramic having excellent abrasion resistance, heat resistance, arc resistance, etc. The edges are fitted into the guide grooves 15, 15, and as described later, by operating the switch lever 6, the edges are moved along the fixed contact piece group and in a direction approximately perpendicular to the direction of elastic contact of the movable contact piece 4, that is, by operating the switch lever 6 as described later.
In this embodiment, the insulating thin plate 5 is slidable in the front and back direction along the guide grooves 15, 15.
When the switch slides backward, the thin insulating plate 5 is inserted between the contact portions 31 and 42 of both the contact pieces 3 and 4, and both the contact pieces 3 and 4 are separated to be in the OFF state. It is composed of Then, when the insulating thin plate 5 slides forward, the movable contact piece 4 is elastically restored, and the contact part 42 of the movable contact piece 4 comes into elastic contact with the contact part 31 of the fixed contact piece 3, thereby turning on the ON state. has been done.

Furthermore, a notch 51 is formed in the insulating thin plate 5, and this notch 51 is for adjusting the contact/separation timing of each movable contact piece 4 and each fixed contact piece 3. The notches are cut out in a stepwise manner so that the distances from the contact portions 42 and 31 are different. Therefore, when this insulating thin plate 5 is inserted between both contact pieces 4 and 3, as shown in FIG. It is inserted between the contact portions 42a and 31a of the movable contact piece 4a and the fixed contact piece 3a at the position, and is first turned OFF, and then the notch portion 51b having the second shortest distance from the contact portion corresponds to this. They are inserted between the contact portions 42b and 31b of the movable contact piece 4b and the fixed contact piece 3b to be in the OFF state, and in this way, they are inserted sequentially from the notch portion with the shortest distance to the contact portion.
It becomes an OFF state. When the insulating thin plate 5 is removed, contrary to the above, the notch part with the longest distance to the contact part is removed in order, resulting in an ON state, thus making it possible to achieve sequential contact/detachment timing adjustment. It can be done easily and reliably.

In this embodiment, the shape of the notch 51 is stepped, but it may be cut in a diagonal straight line or in a chevron shape as shown in FIG. It goes without saying that various cutout shapes can be obtained.

The switch lever 6 is integrally formed with shaft parts 61, 61 projecting left and right at its rear end, and the tips of the shaft parts 61, 61 are connected to the rear wall 16 of the switch box.
The shafts 61, 61 are fitted with torsion springs 62, 62, respectively. One end of the torsion springs 62, 62 is engaged with a protrusion 63, 63 of the switch lever 6, and the other end is engaged with a recess 18 of the rear wall 16 of the switch box. Then switch lever 6
is movable up and down about the shaft portions 61, 61 at the rear end, and is always biased to rotate upward by the force of torsion springs 62, 62, and under normal conditions, this switch lever A tip operation section 64 of No. 6 is locked to the front edge of the switchbox top plate 11.

A rotating body 8 is connected to the switch lever 6 via a pair of torsion springs 7, 7. This rotary body 8 has shaft parts 81, 81, arm parts 82, 82, and claw parts 83, 83 at both ends thereof, and the shaft parts 81, 81 bear the bearings of the left and right side walls 13, 13 of the switchbox. The claws 83, 83 are rotatably supported by the protruding strips 14, 1 of the left and right side walls 13, 13 of the switchbox.
4 and enters the guide grooves 15, 15, and the recessed notches 52, 5 on both left and right edges of the insulating thin plate 5.
It is engaged with 2. And the torsion springs 7, 7
One end is the pivot part 6 in the middle of the switch lever 6.
5 and 65, the other ends are pivotally supported by the tip pivot parts 84 and 84 of the arm parts 82 and 82 of the rotating body 8, respectively.

In the switch configured as described above, when the switch lever 6 is in the position shown in FIG. In this state, the claw portion 83 of the rotating body 8 tilts toward the rear as shown in the figure, and the claw portion 8
Since the insulating thin plate 5 that engages with the movable contact piece 4 and the fixed contact piece 3 is inserted between the contact portions 42 and 31 of the movable contact piece 4 and the fixed contact piece 3, the insulating thin plate 5 is in an OFF state.

Now, from this OFF state, apply an external force to the tip operating portion 64 of the switch lever 6 to rotate the lever 6 downward as shown by arrow B, thereby turning the switch lever 6, which pivots on one end of the torsion spring 7, into place. Branch 65 is
Rotator arm 8 that pivotally supports the other end of the torsion spring 7
When the switch lever 6 reaches its position below the line l connecting the tip pivot portion 84 of the rotating body 8 and the shaft portion 61 at the rear end of the switch lever 6, the expanding force of the torsion spring 7 moves the arm portion 82 of the rotating body 8 in a direction indicated by the arrow C. It acts in the direction of upward rotation, as in Therefore, the rotating body 8 rotates in the direction of arrow C until the tip of the arm 82 hits the top plate 11 of the switch box 1, as shown in FIG. 2B, and the claw 83 also rotates in the same direction. As a result, the insulating thin plate 5 engaged with the claw portion 83 slides forward (to the right in the figure) along the guide groove 15, and is moved between the movable contact piece 4 and the fixed contact piece 3. be removed from. Therefore, as described above, each movable contact piece and each fixed contact piece are brought into sequential contact.

Next, when the external force applied to the tip operating portion 64 of the switch lever 6 is removed, the switch lever 6
is rotated in the direction opposite to arrow B by the force of a torsion spring 62 fitted onto the shaft portion 61, but the pivot portion 6
5 is located above the straight line l, the expanding force of the torsion spring 7 is applied to the arm portion 82 of the rotating body 8.
The rotating body 8 rotates in the opposite direction to the arrow C direction, and the insulating thin plate 5 engaged with the claw portion 83 of the rotating body 8 rotates in the opposite direction to the arrow C direction. It slides backward and is inserted between both the contacts 42 and 31 of the movable and fixed contact pieces 4 and 3, returning to the state shown in FIG. 2A. Therefore, each movable contact piece and each fixed contact piece are sequentially separated as described above.

In this way, each movable contact piece 4... and each fixed contact piece 3...
When the contact pieces are brought into contact with and separated from each other by inserting and removing the insulating thin plate 5 between them, the distance between the contact points of the movable contact piece 4 and the fixed contact piece 3 in the OFF state is equal to that of the insulating thin plate 5. 5, and since contact can be reliably broken by the inserted insulating thin plate 5, the distance between the contacts can be greatly shortened compared to conventional switches. Therefore, since the amount of deflection of the movable contact piece 4 is reduced, less force is required for the contact/separation operation, and lighter operation and longer life can be achieved.

Furthermore, by connecting and disconnecting the contact pieces by inserting and removing the insulating thin plate 5, arc generation can be directly interrupted, so the so-called "drag" of the arc is eliminated, and contact failure is greatly reduced. In addition to this, the contact portions 31 and 42 are also cleaned at the same time by inserting and removing the insulating thin plate 5, eliminating poor contact and ensuring electrical switching.

Further, since the insulating plate 5 is formed with the notch 51 for adjusting the contact/separation timing, sequential contact/separation can be carried out reliably without any disturbance, as described above. In addition, by simply replacing the insulating thin plate with one with a different shape of the notch, the switching mode can be changed to the desired switching mode very easily, and such mode changes and maintenance can be easily handled. . Furthermore, since the thin insulating plates 5 are inserted at different times, it is possible to avoid concentration of force required for insertion at one time. In particular, if a thin insulating plate made of resin such as Teflon is used, the coefficient of friction with the contact piece is extremely small, which, together with the force required for insertion being dispersed as described above, provides a switch with extremely light operation. becomes possible.

As described above, the switch of the present invention has remarkable effects and is extremely suitable for use as, for example, a telephone switch or a switch program card insertion type deep switch.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view of an embodiment of the present invention, Fig. 2 A and B are sectional views of the embodiment in the OFF state and ON state, respectively, Fig. 3 is a perspective view of the main parts of the embodiment, and Fig. 4 Figures A and B are plan views showing other examples of insulating thin plates, respectively. 3... Fixed contact piece, 4... Movable contact piece, 5... Insulating thin plate, 51... Notch part.

Claims (1)

[Scope of utility model registration request] A fixed contact piece is installed between a fixed contact piece group consisting of a plurality of fixed contact pieces arranged in parallel and a movable contact piece group consisting of a plurality of movable contact pieces that face each fixed contact piece and can come into elastic contact with the fixed contact pieces. an insulating thin plate that is slidable along the group in a direction substantially perpendicular to the direction of elastic contact of each movable contact piece, and that has a notch formed therein for bringing the contact portions of the opposing fixed contact piece and movable contact piece into contact with and away from each other as the contact pieces slide; 1. A switch in which a switch is provided that can be freely inserted and removed, and the distances of the cutout portions from the contact portions of each of the fixed contact pieces and the movable contact pieces are individually set.