JPS6316096Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a reversible changeover switch, in which an actuating body that rapidly rotates a terminal plate is forced to stop at a predetermined position to prevent excessive displacement via a reversal spring. The purpose is to provide a switch that can improve performance.

An example of a conventional reversible change-over switch is shown in Fig. 1. In the figure, a switch 1 has a case 2 (having three side plate portions 2a to 2c), and four vertical grooves 3 in a thick bottom plate portion 3 of the case 2.
a each have a spring-type operating plate 4 and three spring-type terminal plates 5
The terminal plates 5 to 7 are fitted into the case 2. The operating plate 4 has a recess 4a and a U-shaped tip 4b, and a resin operating body 8 is fixed near the tip.
It protrudes from the bottom surface and is connected to other circuits.
They each have contacts 5a to 7a at their upper ends, and the central terminal plate 6 in particular has a protruding portion 6b at its tip.

The reversing spring 9 is a semicircular plate spring member, and the engagement recess 9a at one end is connected to the tip of the U-shaped portion 4b of the actuating plate 4.
The hole 9b at the other end is engaged with the pair of engagement protrusions 4c.
is fitted into the convex portion 6b of the central terminal plate 6, and is secured and secured between both 4 and 6. At this time, the reversal spring 9
Due to the spring force, the central terminal plate 6 is rotated to the right in the figure, and the contacts 6a and 7a come into contact (contacts 6a, 7a).
5a is non-contact) The terminal plates 6 and 7 are electrically connected to each other.

The side plate 10 is made of resin and is fixed to the bottom plate part 3 and side plate parts 2a and 2c on one side of the case 2 with an adhesive. In this case, each groove 3a is provided with a large part in the middle to form a gap on each side of the actuating plate 4 and the terminal plates 5 to 7, and at the same time, the actuating plate 4 has adhesive poured into this gap as well. , the terminal plates 5 to 7 are fixed to the bottom plate portion 3. The switch 1 is assembled and fixed to another board or the like using bolts inserted through a pair of holes 2d provided in the case 2.

When operating the switch 1, the actuating body 8 is
When pressed in the direction of the arrow in the figure, the actuating body 8 is displaced in the same direction with rotational displacement of the actuating plate 4 to the right in the figure, and at a predetermined position, the reversing spring 9 is reversed and its lower end is rotated to the right in the figure. Rapid displacement to the left. As a result, the center terminal plate 6 is also rapidly rotated in the same direction, and the contact 6
A releases contact with contact 7a and switches to contact with contact 5a, and terminal plates 5 and 6 switch to conduction. Note that the lower end of the reversing spring 9 is kept out of contact with the actuating plate 4 and has a concave portion 4a.
The displacement stroke of the terminal plate 6 is increased accordingly to ensure contact switching.

Subsequently, when the pushing force of the actuating body 8 is released, the actuating body 8 returns to its rotational displacement due to the spring force of the actuating plate 4.
During this time, the reversing spring 9 returns to its inverted state. As a result, the terminal plate 6 rapidly returns to its rotational displacement, and its contact 8a releases contact with the contact 5a and switches to contact with the contact 7a.

However, according to the above-mentioned conventional example, when the actuating body 8 is pressed in the direction of the arrow, there is no means for stopping the actuating body 8 at the displacement limit position, and the actuating body 8 is not excessively displaced. This has the disadvantage that the actuating plate 4 may be permanently deformed, which may impede the displacement operation, or the terminal plates 5, 6 may be damaged, resulting in malfunction in contact switching.

The present invention eliminates the above-mentioned drawbacks, and each embodiment thereof will be described below with reference to the drawings.

2 and 3 are partially cutaway perspective views of an embodiment of the reversible changeover switch according to the present invention before and after operation, respectively. In the figure, reversible changeover switch 2
1 has a case 22, and the case 22 is shown in FIG.
As shown in FIGS. 4 and 6 A to C, the three side plate parts 23 to 25 and the thick bottom plate part 26 are integrated, and the side plate parts 23 and 25 each have a hole in a protrusion provided at the outer lower end. 23a, 25a, and leg portions 23b, 25b that protrude further downward from the lower surface of the bottom plate portion 26 are integrally formed, and step portions 23c, 25c are provided on the upper front end surface, respectively.
have. Further, the side plate portion 23 is integrally formed with a convex portion 23d on the outer upper end and a convex portion 23e on the inner side,
Further, the side plate portion 25 is integrally formed with a convex portion 25d inside. Further, the side plate portion 24 is integrally formed with a protrusion portion 24a that faces the protrusion portion 25d and is spaced apart from the protrusion portion 25d.

As shown in FIG. 4 and FIGS. 6A to 6C, the bottom plate portion 26 has a recess 26b on the front side surface 26a, and three grooves 26c in the vertical direction. 24, and a convex portion 26d is formed on the bottom surface of the concave portion 26b. Further, a hole 26e is formed through the convex portion 26d.

27 to 29 are three terminal boards, and the terminal board 27 has a terminal portion 2 at the lower end of the long spring board as shown in FIG.
7a, has a notch 27b, and has a roughly U-shaped hole 27c in the center with a tongue-shaped terminal plate 27d (having a contact 27e) remaining therein, so that a U-shaped actuator is provided relatively outwardly. A plate portion 27f is formed, and an engagement hole 27g is further provided at the upper end. After the terminal plate 27 is engaged with the actuating body 30, which will be described later, in the engagement hole 27g,
It is fitted into the groove 26c on the left side in the figure of the case 22, and the notch 27b is engaged with the protrusion 26d to be attached. The center terminal plate 28 similarly has a terminal portion 28a and a cutout portion 28b, and also has contacts 28c on both upper surfaces and a claw portion 28d at the upper end, and is fitted into a groove 26c at the center of the case 22 in the figure. The portion 28b is engaged with and attached to the protrusion 26d. The other terminal board 29 similarly has a terminal part 29a, a notch part 29b, and a contact point 29c at the upper part.
Groove 26c and both convex portions 24a, 25d on the right side in the figure
The notch 29b is commonly fitted into the gap between the protrusions 2 and 2.
6d and is attached. Therefore, terminal board 2
Since the plate 9 is supported at two places in the thickness direction, the structure is stabilized and the contact switching described later becomes reliable.

Reference numeral 30 denotes a moving body made of resin, which is integrally formed with a pair of engaging recesses 30a on the upper part, an engaging protrusion 30b and a stopper protruding part 30c on one side, and a locking part 30d having a U-shaped cross section on the other side. So, as above, case 22
The convex portion 30b is engaged with the engagement hole 27g to be attached and fixed to the terminal plate 27 before attachment.

Reference numeral 31 denotes a semicircular reversing spring, which has a pair of engagement protrusions 31a at one end and a pair of engagement holes 31b at the other end, as shown in FIG. The portion 31a is engaged with each concave portion 30a of the actuating body 30, and the engagement hole 31b is inserted into the claw portion 28d of the central terminal plate 28.
28 and 30, and is fixedly secured between the two 28 and 30. At this time, as shown in FIG. 2, the actuating plate portion 27f of the terminal plate 27 and the actuating body 30 are rotated and biased to the left in the figure by the spring force of the reversing spring 31.
It is stopped by bringing one side of f into contact with the convex portion 23e of the case 22 and by bringing the convex portion 30c of the actuating body 30 into contact with the inner surface of the side plate portion 23 of the case 22, and the center terminal plate 28 is located on the right side in the figure. The contact point 28c is brought into contact with the contact point 29c of the other terminal board 29, and thereby the terminal boards 28 and 29 are electrically connected.

32 is a side plate made of resin, and as shown in FIGS. 4 and 5, a pair of recesses 32 are formed approximately in the upper half of the inner surface 32a.
A pair of convex portions 32d and 32e (a groove 32f therebetween) are provided at the bottom of the convex portions 32d and 32c, and a pin portion 32g is integrally provided on the convex portion 32d. As shown in FIG. 4 and FIG.
6b, the pin portion 32g is inserted into the hole 26e, and the inner surface 32a is brought into contact with the front surface 26a of the bottom plate portion 26, and the pair of recesses 32b, 32
The bottom surface of c is connected to each stepped portion 23c of the side plate portions 23 and 25, respectively.
25c, and then the portion of the pin portion 32g protruding from the hole 26e is fixed together. At this time, the central terminal plate 28 is fitted into the groove 32f of the side plate 32, and the pair of protrusions 32d and 32e are fitted between the terminal plates 27 and 28 and between the terminal plates 28 and 29, respectively. Therefore, the position of the terminal plates 27 to 29 in the thickness direction is controlled by the grooves formed on both inner surfaces of the recess 26b and between the protrusions 32d and 32e, even in the recess 26b other than the grooves 26c. This results in a stable and strong mounting structure. In addition, since the side plate 32 is substantially fixed to the case 22 only by the pin portion 32g, and the upper part of the side plate 32 is merely in contact with the case 22, there is a risk that it will be bent and deformed outward by external force. However, the upper part of the inner surface 32a forms a rib portion between the recesses 32b and 32c, thereby preventing the above-mentioned bending deformation.

Before attaching the switch 21 to another board, etc., each terminal part 2 is positioned by bringing the lower surfaces of the pair of legs 23b and 25b in FIG. 2 into contact with the board as necessary.
Predetermined wiring is performed to 7a to 29a. If the front or rear surface of the switch 21 is to be directly attached to a board or the like, bolts may be inserted through the holes 23a and 25a.

Next, the operation of the switch 21 will be further explained using FIGS. 7A and 7B. When the actuating body 30 is pressed in the direction of the arrow in FIGS. 2 and 7A, the actuating body 30 is rotated to the right in the figure with the spring displacement of the actuating plate portion 27f of the terminal plate 27. The remaining terminal plate portion 27d remains in its original position with almost no displacement. Subsequently, the reversing spring 31 is reversed at a predetermined rotational position of the actuating body 30, and its lower end is rapidly displaced to the left in the figure, and the terminal plate 27 is moved as shown in FIGS. 3 and 7B.
is inserted through the U-shaped hole 27c without contacting the U-shaped hole 27c. As a result, the center terminal plate 28 is also rapidly rotated in the same direction, and its contact 28c releases contact with the contact 29c and is switched into contact with the contact 27e, and the terminal plate 2
7 and 28 are switched conductive. Subsequently, as the operating body 30 is rotated, the U-shaped locking portion 30d engages the side plate portion 23 of the case 22, as shown in FIGS. 3 and 7B.
is brought into abutment engagement with the outer upper end convex portion 23d, and further rotational displacement is forcibly stopped.

Therefore, according to this, the actuating body 30 is connected to the locking portion 30
d. Because the engagement of the convex portion 23d forcefully stops and prevents excessive rotation, the actuating plate portion 27f may be permanently deformed and the terminal plate portion 27d and other terminal plates 28, 29 may be permanently deformed.
It will not be damaged due to excessive force being applied to it.

Next, when the pressing force of the actuating body 30 is released, the actuating body 30 returns to its rotational displacement due to the spring force of the actuating plate portion 27f, and during this time, the lower end of the reversing spring 31 slips out of the U-shaped hole 27c and returns to being inverted. . As a result, the center terminal plate 28 rapidly returns to its rotational displacement, and its contact 28c releases contact with the contact 27e and switches back to the contact 29c.

8A and 8B show another embodiment of the reversible changeover switch of the present invention, in which the same parts as in FIGS. 7A and 7B are given the same reference numerals, and their explanation will be omitted. In the above-mentioned switch 21, the actuating body 30 has no relative positional restriction with respect to the case 22 during rotational displacement.
When the actuating plate part 27f vibrates laterally due to some external force other than the pressing direction, the lower end of the reversing spring 31 comes into contact with the actuating plate part 27f, causing the terminal plates 27 and 28 to become conductive or switching operation before the contacts 28c and 27e come into contact. There is a problem that it becomes unstable.

Therefore, in this embodiment, as shown in FIG. The position of the operating body 30 is regulated so as not to oscillate laterally by the guides of both 30e and 23f until after the switching operation shown in FIG. Therefore, even if an external force is applied to the actuating body 30 in a direction other than the normal pressing direction, the actuating plate portion 27f will not oscillate laterally and the above-mentioned problem will not occur.

9A and 9B show still another embodiment of the above-mentioned switch. In this case, contrary to the other embodiments described above, a long hole 30f is provided in the locking portion 30d of the actuating body 30, and the convex portion of the case 22 is provided with a long hole 30f. A narrow protrusion 23g integrally protruding from the portion 23c is inserted, and the same effects as in the other embodiments described above are produced.

In each of the above embodiments, three terminal boards 27 to 29 are provided, but the terminal boards 27 and 28 are not limited to this.
The contact may be turned ON and OFF by using only two sheets.

As described above, according to the reversible changeover switch of the present invention, the actuating body is forcibly stopped and abutted at a predetermined position after the contact is switched during its displacement, so that the actuating plate is not displaced any further. It has the advantage of not causing permanent deformation of the terminals or damage to each terminal board due to excessive displacement, and that it can always perform good and stable contact switching and improve switch performance.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional example of a reversible changeover switch with the side plate removed, and Figs. 2 and 3 are views of an embodiment of the reversible changeover switch of the present invention before and after operation, respectively. 4 is an exploded perspective view of the switch, FIG. 5 is a perspective view of the case and side plate of the switch, and FIGS. 6A to 6C are front views of the case, respectively. -B line and C
7A and 7B are partially cutaway views showing the state of the actuating body of the switch before and after the operation, respectively. FIGS. 9A and 9B are partially cutaway views showing the operating body before and after operation of another embodiment of the above-mentioned switch, respectively. FIG. 1, 21...Reversing type changeover switch, 2, 22...
...Case, 3, 26...Bottom plate part, 4...Operation plate,
5-7, 27-29...Terminal board, 23d...Convex portion, 8,30...Operating body, 9,31...Reversing spring, 10,32...Side plate, 23f, 30f...Long hole, 23g , 30e... Protrusion, 27c... U-shaped hole, 27d... Terminal plate part, 27f... Actuation plate part, 30d... Locking part.

Claims (1)

[Scope of utility model registration request] As the actuating body attached to the actuating plate is displaced, one of the plurality of terminal plates fixed to the case is rapidly displaced via a reversing spring located on the case, and is switched into contact with the other terminal plate. In the reversible changeover switch, a convex portion is formed at the upper end of the case to protrude outward, and the other terminal plate is attached and fixed to the actuating body, and the convex portion is provided at a position facing the case. forming a locking portion having a substantially U-shaped cross section so as to cover the reversing spring, and locking one end of the reversing spring to the one terminal plate and attaching the other end to the actuating body;
A reversible changeover switch configured such that, after the one terminal plate comes into switching contact with the other terminal plate as the operating body is displaced, the locking portion abuts and engages with the convex portion.