JP3207694B2 - Key type selector switch - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is mounted on a control panel for controlling a motor or the like, and is used for turning on / off a switch.
More particularly, the present invention relates to a key-type selector switch which can be turned on / off only by inserting a key.

[0002]

2. Description of the Related Art FIG. 5 is an elevational view including a partial sectional view of a key type selector switch showing a conventional example. In this figure, the key type selector switch is the key unit 1 in the figure.
0 and the lower contact unit 16. When the key unit 10 is mounted on the control panel, the key unit 10 goes out of the wall of the control panel and the contact unit 16 is in the wall. The key unit 10 and the contact unit 16 are mechanically connected by a connection fitting (not shown). In this figure, the contact unit 16
Although only one is described, a plurality may be connected in series. The contact unit 16 is provided with two screw terminals 17, a lead wire is connected to the screw terminal 17, and a contact which is provided inside the contact unit 16 and which is turned on and off in accordance with the rotation angle of the connection fitting is provided. Is provided.

The key unit 10 is provided with a rotor case 15 inside a cover 13 and a rotor 12 at the center. The above-mentioned connecting fitting is mechanically connected to the rotor 12. Although the key 11 is shown inserted into the rotor 12, the key 11 can be freely inserted and removed. On the inner diameter side of the rotor case 15, a groove plate 14, which will be described in detail later, is provided.

FIG. 6 shows the rotor case 15 and the groove plate 14 shown in FIG.
FIG. 6A is a perspective view showing three groove plates 14.
FIG. 6B shows the rotor case 15. The rotor case 15 is provided with three sets of grooves 151 provided at 180 ° in the circumferential direction with respect to each other. The groove plate 14 shown in FIG.
Is inserted into this groove 151. As shown, the cross-sectional shape of the groove plate 14 is arcuate on the outer diameter side and the inner diameter side, and the width is the same in the radial direction. The reason this shape is adopted is
This is because the groove plate 14 can be inserted into the groove 151 from the inner diameter side of the rotor case 15.

As can be seen from FIG. 5, when the groove plate 14 is inserted into the groove 151 of the rotor case 15, the groove plate 14 easily comes off toward the inner diameter side. However, the rotor 12
Is not obstructed by the rotor 12 and does not fall off. FIG. 7 is a horizontal sectional view of a portion where the rotor 12 of FIG. 5 is provided. In this figure, a fitting called a tumbler is provided in the rotor 12. Tumbler 12
Reference numeral 1 denotes a sheet metal stamped into a shape as shown in the figure, and a plurality of sheets are provided so as to overlap in a direction perpendicular to the paper surface. This figure shows only one of them, and each tumbler 121 has a different size depending on the unevenness of the key 11. A key hole 123 is provided in the center of the tumbler 121, and the key 11 is inserted into the key hole 123. The tumbler 121 exerts a force to move the tumbler 121 downward always by the spring 122. In this figure, the lower groove plate 14 is in the way, so that the tumbler 121 cannot move downward. Although there is a slight gap in the figure, the tumbler 121 is actually in a state of hitting the lower groove plate 14. As described above, the key 11 cannot be inserted into the keyhole 123 when the tumbler 121 cannot move due to being obstructed by the groove plate 14. When the position of the tumbler 121 is at the position of the groove 151 where the groove plate 14 is not inserted, the tumbler 121
The key 11 can be inserted by moving with the force of 22. The position is set so that the on / off state of the contact of the contact unit 16 is determined at that position.

[0006]

As can be seen from FIG. 7, the groove plate 14 does not fall off to the inner diameter side due to the presence of the rotor 12 and the tumbler 121.
In the manufacturing process of the first embodiment, in the step of incorporating the groove plate 14 into the rotor case 15 and thereafter inserting the rotor 12, there is no structural support for the groove plate 14 before the rotor 12 is inserted. A troublesome operation such as inserting the rotor 12 while pressing the groove plate 14 is required. Therefore, there is a problem that work is time-consuming and efficiency is poor. Further, as schematically shown by the groove plate 14 at the top of the figure, when the groove plate 14 is inclined and protrudes from the groove 151, the tip of the rotor 12 may hit and hinder the rotational movement of the rotor 12. There may be a problem.

An object of the present invention is to solve such a problem and to provide a key type selector switch which can prevent the groove plate from falling off the groove.

[0008]

According to the present invention, in order to solve the above-mentioned problems, a plurality of grooves provided on an inner diameter surface of a rotor case, which is formed of a cylinder and in which a rotor is rotatably housed, are provided. In a key type selector switch provided with a groove plate inserted in these grooves to fill the grooves, at least one engaging portion is provided at each of both circumferential ends of the groove plate, and the groove plate is provided in the groove. It is assumed that an engaging portion that engages with the engaging portion is provided. Further, the engaging portion of the groove plate is a projection, and the engaging portion of the groove is an engaging groove. In addition, the groove plate has a projection provided at a tip end in the insertion direction of the groove plate and protruding in the insertion direction, and the groove has a small groove into which these protrusions are inserted. Further, in a key type selector switch having a plurality of grooves provided on an inner diameter surface of a rotor case which is formed of a cylinder and in which a rotor is rotatably housed, and a groove plate inserted in these grooves to fill the grooves. The shape of the groove plate inserted into the groove of the rotor case and both side surfaces of the groove are formed narrower from the outer diameter side toward the inner diameter side.

[0009]

In the structure of the present invention, at least one projection is provided on each end of the groove plate on both sides in the circumferential direction. Since the movement of the projection is restricted by the engagement groove, as a result, the groove plate itself does not move in the radial direction and comes out of the groove. Also, if two projections of the groove plate are provided at each end on both sides in the circumferential direction, it is the same as a long projection connecting the two projections, and the groove plate is stably inserted into the groove. Will remain.
Further, the groove plate has a projection provided at a tip end in the insertion direction of the groove plate, and a projection provided in a direction opposite to the tip end, and a projection provided in a circumferential direction provided on a tip side opposite to the tip end. When the groove is provided with a small groove into which these protrusions are inserted, and in accordance with this, a small groove into which the protrusion is inserted is provided, the protrusion in the insertion direction restricts the movement of the lower portion of the groove plate, and the circumferential direction is restricted. Since the protrusion restricts the movement of the upper part, the groove plate is stable as in the case where two sets of circumferential protrusions are provided.

Since the opening on the inner diameter side of the groove is narrower than the outer diameter side, the groove plate inserted into the groove of the rotor case does not fall off as in the case of providing the projection as described above.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a perspective view of a rotor case and a groove plate showing a first embodiment of the present invention. FIG. 1A shows three groove plates 1.
4A, the groove plate 14A has a shape in which four protrusions 141 are provided on a rectangular parallelepiped. The projection 141 is the groove plate 14
A is provided at an end in the circumferential direction of A and protrudes in the circumferential direction. Since the protrusion 141 is formed by crushing the portion of the protrusion 141 by pressing, a cutout portion occurs. As described above, this notch is formed at the time of pressing, and if another manufacturing method is adopted, the notch may not be formed. FIG.
In the groove 151A of the rotor case 15A of (b), small grooves 152 into which the protrusions 141 of the groove plate 14A are inserted are provided at both ends in the circumferential direction at the back. The groove plate 14A is
When inserting the groove plate 51A, the groove plate 14A is inserted from above the groove 151A. At this time, the protrusion 141 is inserted into the small groove 152. In the inserted groove plate 14A, the protrusion 141 has the small groove 15.
2, it does not fall off in the radial direction. The two sets of the protrusions 141 are provided in one set.
May be oblique. Therefore, 2
A configuration in which one projection 141 is connected to provide long projections on both sides may be employed.

FIG. 2 is a perspective view of a rotor case and a groove plate showing a second embodiment of the present invention. FIG. 2A shows three groove plates 14B. The groove plate 14B is formed of a rectangular parallelepiped, and has two protrusions 141B protruding on both side surfaces and one protrusion 142 protruding at the lower end. FIG.
The groove 151B of the rotor case 15B is provided with small grooves 152 at both ends in the circumferential direction in the same manner as the groove 151 of FIG. 1, and a protrusion 142 of a groove plate 14B shown in FIG. A small groove 153 is provided. The projection 141B of the groove plate 14B is fitted in the small groove 152, and the projection 142 is fitted in the small groove 153. The protrusion 141B is the small groove 15
2, the groove plate 14B can be prevented from falling down to the inner diameter side, and the projection 142 can be fitted into the small groove 153 to prevent the lower end of the groove plate 14B from shifting.

Although the groove plate 14B having such a shape can be cut out by cutting, it is more appropriate to manufacture it as a casting. Pressing projection 141 as in FIG.
If B and 142 are formed, a notch will occur. FIG. 3 is a vertical sectional view showing a state in which the groove plate 14B of FIG. 2 is fitted into the groove 151B. In this figure, the projection 142 at the lower end of the groove plate 14B is fitted into the small groove 153 so as not to come off. Although there is no gap between the projection 142 and the small groove 153 in the drawing, the projection 142 is actually made smaller than the size of the small groove 153 in consideration of manufacturing errors and the like.

FIG. 4 is a perspective view of a rotor case and a groove plate showing a third embodiment of the present invention. FIG. 4A shows three groove plates 14C, and the groove plate 14C has a fan-shaped cross section and has no protrusion. Rotor case 1 of FIG.
The groove 151C of 5C has a fan-shaped cross section whose inner diameter side is narrow and whose outer diameter side is wide according to the cross-sectional shape of the groove plate 14C. Groove 151
When the groove plate 14C is inserted into C from above, the groove plate 14C does not fall on the inner diameter side because the inner diameter side is narrow.

The cross-sectional shape of the groove plate 14C may be trapezoidal in addition to the fan shape. When the groove plate 14C has a fan shape, a cylindrical material can be easily cut into a narrow shape on the inner diameter side by cutting along a radial direction, and a long and thin rod-like material is alternately inclined. By changing the direction of the cutting, one groove plate can be formed for each cutting. There are various shapes of the groove plate that can achieve the same object in addition to the above three examples, but in any case, in consideration of the ease of manufacturing the groove plate itself and the grooves and small grooves of the rotor case. You just have to choose the right one.

[0016]

As described above, the present invention employs a structure in which the groove plate does not fall out of the groove of the rotor case, so that after the groove plate is inserted into the groove, the operator does not press the groove plate by hand. Even if the groove plate does not come off, work becomes easier,
The effect that the efficiency of the assembling work of the key type selector switch is improved is obtained. Further, there is no possibility that the groove plate protrudes from the groove and hits the rotor to alienate its rotation.

As a structure in which the groove plate does not fall out of the groove,
A configuration in which a protrusion is provided on the groove plate and a small groove into which the protrusion fits is provided in the groove of the rotor case, or the cross-sectional shape of the groove plate is a fan-shaped or trapezoidal shape with a narrow inner diameter side, and the groove of the rotor case also corresponds to this. A configuration such as a cross-sectional shape can be adopted.

[Brief description of the drawings]

FIG. 1 is a perspective view of a rotor case and a groove plate showing a first embodiment of the present invention.

FIG. 2 is a perspective view of a rotor case and a groove plate showing a second embodiment of the present invention.

FIG. 3 is a vertical sectional view showing a state where the groove plate of FIG. 2 is inserted into a groove of a rotor case.

FIG. 4 is a perspective view of a rotor case and a groove plate showing a third embodiment of the present invention.

FIG. 5 is an elevation view including a partial cross-sectional view of a conventional key type key type selector switch.

FIG. 6 is a perspective view showing the rotor case and the groove plate of FIG. 5;

FIG. 7 is a horizontal sectional view of a portion where the rotor of FIG. 5 is present;

[Explanation of symbols]

11 ... key, 12 ... rotor, 14, 14A, 14B, 14
C: groove plate, 141, 141B, 142: protrusion, 15, 1
5A, 15B, 15C ... rotor case, 151, 151
B, 151 ... groove, 152, 153 ... small groove,

──────────────────────────────────────────────────続 き Continuation of the front page (72) Inventor Takehisa Takeuchi 755-1, Ogano, Ogano-machi, Chichibu-gun, Saitama Prefecture Examiner, Chichibu Fujiuchi Co., Ltd. Examiner Takaaki Ishii (56) References JP-A-1-122527 (JP, A) Hikaru 4-92352 (JP, U) (58) Fields surveyed (Int. Cl. ⁷ , DB name) H01H 27/06-27/10

Claims (4)

(57) [Claims] 1. A key type comprising a plurality of grooves provided on an inner diameter surface of a rotor case, which is formed of a cylinder and in which a rotor is rotatably housed, and a groove plate inserted in these grooves to fill the grooves. In the selector switch, at least one engaging portion is provided at each end on both sides in the circumferential direction of the groove plate, and the groove is provided with an engaging portion that engages with the engaging portion of the groove plate. Key type selector switch. 2. The key-type selector switch according to claim 1, wherein said engaging portion of said groove plate is a projection, and said engaging portion of said groove is an engaging groove. 3. The groove plate has projections provided at the tip end of the groove plate in the insertion direction, the projections projecting in the insertion direction, and the grooves have small grooves into which these projections are inserted. A key-type selector switch according to claim 1. 4. A key type comprising a plurality of grooves provided on an inner diameter surface of a rotor case, which is formed of a cylinder and in which a rotor is rotatably housed, and a groove plate inserted into these grooves to fill the grooves. In the selector switch, a shape of a groove plate inserted into the groove of the rotor case and both side surfaces of the groove are formed narrower from an outer diameter side toward an inner diameter side.