JPH11154445A - Operating-type switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To lessen the number of parts and shorten a trunk, also to provided an excellent clicking feel, in a switch of a key operating type or a knob operating type mounted to a control panel, etc., and used. SOLUTION: A dog 7 rotated by rotatingly operate an operating part of it is provided with a switch operating plane S which pushes in and returns a pushbutton 10a of the switch body 10, and a cam member 8 which engages and holds the dog 7 in the switch-on and the switch-off positions is equipped so that the cam member 8 can be released from the engagement, then the cam member 8 is energized by a spring 9 in the direction of the engagement with the dog 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operable switch mounted on a control panel or the like.

[0002]

2. Description of the Related Art The above-mentioned operable switch is constructed so that an operation section is turned by a key or a knob, and an example of the key-operated switch is shown in FIG.

The key-operated switch has a cylindrical main body case 21 having a flange portion 22 externally connected to an outer end portion,
A cylinder case 23 which is fitted therein so that it cannot rotate,
A cylinder body 24 whose rotation lock with respect to the cylinder case 23 is released by insertion of the key K, and a cam member 26 which is externally fitted to the inner end of the cylinder body 24 so as to be integrally rotatable therewith and fixed with screws 25. A plunger 27 that is linearly pressed and displaced along the rotation axis by a cam action accompanying the rotation of the cam member 26, and a spring 28 that slidably biases the plunger 27 in the direction of engagement with the cam member 26.
And guides and supports the plunger 27 and the spring 2
8 includes a base 29 for receiving and supporting the fixed end of the switch 8 and a switch body 30 fitted and fixed to the body case 21. The body case 21 is inserted into the control panel P from the front and the panel back. By tightening the nut 31 from the side, the control panel P is sandwiched and fixed between the flange portion 22 and the seat 32.

FIG. 6 shows a switch-off state in which a push button 30a protruding from the switch main body 30 projects to a return position, and as shown in FIG. Recess 3 provided on member 26
3, the lower end of the plunger 27 is at the upper limit. When the cylinder main body 24 is rotated in a predetermined direction from the switch-off state, the cylinder main body 24 and the cam member 26 rotate integrally, so that the slope of the recess 33 engages the plunger 27 against the spring 25. The plunger 27 is pushed by the push button 3 of the switch body 30.
Pushing 0a causes a switch-on state as shown in FIG. 7 (b). After the plunger 27 pushes and displaces the push button 30a to the maximum extent, the cam member 26 is further operated to rotate, so that FIG.
As shown in (c), the top of the plunger 27 engages with the shallow locking recess 34 formed on the lower side of the recess 33, and the switch-on state is stably maintained.

[0005]

The above-mentioned conventional operation type switch has the following problems.

A cylinder body 21 as an operation unit, a cam member 26 that is rotated integrally with the cylinder body 21, a cam member 26
The plunger 27, which is slid and displaced in accordance with the rotation of the switch, is arranged in series in the direction along the rotation axis (the vertical direction in FIG. 6), and the dimension of the entire switch along the rotation axis is large. Had become. In addition, the number of parts increases, which contributes to an increase in cost.

The push button 30 a of the switch body 30
Is engaged with the locking recess 34 formed in the cam member 26 to hold (lock) the switch-on state. Therefore, the locking recess 34 is required to push the push button 30a securely to displace. As a result, the click feeling when the plunger 27 is engaged with the locking recess 34, that is, the operation feeling to the switch-on position, is insufficient.

[0008] The switch-on state is locked only after the plunger 27 pushes and displaces the push button 30a of the switch body 30 and turns on after the switch is turned on. Therefore, the switch-on state is locked only when the plunger 27 is not operated to the lock position. If the rotation operation is stopped, the cam member 26 may return and rotate by the cam action, and may return to the switch-off state without permission.

An object of the present invention is to solve such a problem of the conventional switch.

[0010]

The invention according to claim 1 is
An operation switch for switching a contact point of a switch body by a rotation operation of an operation unit, wherein the rotation member rotates in response to the rotation operation of the operation unit, and contacts a push button of the switch body. A cam member for engaging and holding the rotating member at the ON position and the OFF position of the switch body is formed on the switch operation surface for pushing and returning the push button. It is provided so as to be displaceable.

According to a second aspect of the present invention, in the first aspect of the present invention, the rotating member has an engaging portion, and the cam member engages with the engaging member in accordance with the rotation of the rotating member. The portion has an engaging portion that disengages and engages, and the engaging depth at the on position and the engaging depth at the off position are set to be substantially the same.

The invention according to claim 3 is the invention according to claim 1 or 2
In the invention according to the first aspect, the cam member and the rotating member are stably engaged with each other in a pushed state in which a maximum pressing contact surface of the switch operating surface of the rotating member is entirely in contact with the push button. Engagement position is set.

The invention according to a fourth aspect is the invention according to the second aspect, wherein the engaging portion is formed on the outer periphery of the rotating member, while the cam member is formed in an annular shape and the engaging member is formed on the inner periphery thereof. A mating portion is formed, and the cam member is externally mounted on the rotation member so as to be displaceable only in a direction along the rotation axis of the rotation member, and is elastically biased in an engagement direction with the rotation member. Is what you do.

According to a fifth aspect of the present invention, in the invention according to the fourth aspect, the projection provided on the outer periphery of the cam member is engaged with a guide groove formed along the rotation axis formed on the inner surface of the case. To guide the cam member along the rotation axis.

The invention according to claim 6 is the invention according to claim 4 or 5.
In the invention according to the above, the rotating member has a flange on the outer periphery of the lower portion, the engaging portion is formed on the upper surface of the flange, and the lower surface of the flange is the switch operation surface, A part of the switch operation surface is cut out upward to reach the engagement portion, and the push button is returned and displaced by the switch operation surface cut out upward.

According to the first aspect of the present invention, when the operating portion is rotated, the rotating member is rotated accordingly, and the switch operation surface formed on the rotating member comes into contact with the push button of the switch body. In operation, the push-in displacement and the return displacement are performed, and the ON state and the OFF state of the switch body are provided.
On the other hand, the relative phase between the rotating member and the cam member changes due to the rotation of the rotating member, and when the rotating member is in the on position and the off position, the rotating member and the cam member engage with each other. Is stably held (locked).

According to the configuration of the second aspect, the click feeling when the rotating member is operated to the ON position of the switch body is the same as the click feeling when the rotating member is operated to the OFF position. Become.

According to the third aspect of the present invention, the cam member is stably engaged with the rotating member at the same time when the rotating member reaches the completely ON position of the switch body, and the locked state is brought about.

According to the structure of the fourth aspect, the annular cam member is arranged so as to overlap with the outer peripheral surface of the rotating member, so that a dedicated space for disposing the cam member in the direction along the rotating shaft is unnecessary.

According to the fifth aspect of the present invention, the cam member is smoothly displaced only in the direction along the rotation axis by the engagement of the projection of the cam member with the guide groove on the inner surface of the case.

According to the sixth aspect of the present invention, a part of the switch operation surface on the lower surface of the flange portion of the rotation member is formed as a switch operation surface for notching upward and displacing the push button. The length in the vertical direction can be reduced.

[0022]

1 and 2 show an example of an operable switch according to the present invention. This operable switch is a key-operated switch, and is used by being operably attached to the control panel P from the front.

The operation switch includes a cylindrical main body case 1 having a flange portion 2 externally connected to an outer end thereof, a metal cylinder case 3 non-rotatably mounted therein, and a key hole 4.
Metal cylinder body 5 whose rotation lock to the cylinder case 3 is released by inserting the key K into the cylinder body 3
And a dog 7 as a rotating member which is externally fitted to the inner end of the cylinder body 5 so as to be integrally rotatable therewith and fixed with screws 6.
An annular cam member 8 fitted externally to the dog 7 so as to be slidable in the direction along the rotation axis, and a spring 9 for urging the cam member 8 to slide toward the flange 7a at the tip (lower end) of the dog. Main body case 1 via leg 1a extending from main body case 1
The main body case 1 with the switch body 10 removed is inserted into the control panel P from the front side, and the nut 11 is tightened from the rear side of the panel. By that, rubber packing 1
The control panel P is sandwiched and fixed between the flange portion 2 having the flange 2 and the seat 13, and then the switch body 10 is fitted and connected to the body case 1.

As shown in FIG. 3, the distal end surface (lower surface) of the flange 7a of the dog 7 is a switch operation surface S facing the push button 10a of the switch body 10, and is partially formed in the circumferential direction. The state in which the push button 10a protrudes into the cam groove 14 cut out upward in the formed substantially trapezoidal shape is a switch-off state. When the cylinder body 5 is rotated in the direction A in the figure from the switch-off state, the push button 10a is pushed and displaced by the inclined surface of the cam groove 14, and is pushed by the switch operation surface S.
Is pushed and displaced, thereby bringing a switch-on state.

As described above, a part of the front end surface (lower surface) of the flange 7a at the lower portion of the dog 7 is cut out upward to form a switch operation surface extending to a lower portion of a later-described angled engagement projection 17, and this switch operation surface is provided. , The length of the dog 7 in the direction (vertical direction) along the rotation axis can be shortened, whereby the length of the operable switch can be shortened.

A pair of rectangular projections 15 are provided as engaging portions at diagonal positions on the outer periphery of the cam member 8, and a guide groove 16 for engaging the rectangular projections 15 is formed on the inner surface of the main body case 1. The cam member 8 is supported so as to be displaceable only in the direction along the rotation axis by the engagement guide action.

A pair of chevron-shaped engaging projections 17 are provided at opposite corners of the upper surface of the flange portion 7a of the dog 7 as engaging portions. A chevron engaging recess 18 as an engaging portion is provided at a pitch.

FIG. 4 shows an outline of the switch operation process.

When the dog 7 is in the switch-off position, as shown in FIG. 4 (a), the push button 10a enters the cam groove 14 formed by notching upward, and
Each chevron engaging projection 17 engages with every other chevron engaging recess 18, and this switch-off state is stably maintained (locked).
Have been.

When the dog 7 is turned by 45 ° in the direction A from the switch-off position, the push button 10a is slightly pushed by the slope of the cam groove 14 and the chevron engagement projection as shown in FIG. The cam member 8 retreats most against the spring 9 by the cam action of the 17 and the chevron engagement recess 18.

When the dog 7 is further turned in the direction A, as shown in FIG. 4C, the push button 10a is further pushed in and displaced, and each chevron engaging projection 17 is moved to the adjacent chevron engaging recess 18 as shown in FIG. Begins to engage.

When the dog 7 is turned 90 ° in the direction A from the switch-off position, as shown in FIG.
The entire push button 10a acts on the switch operation surface S and is pushed to the maximum extent to be displaced to provide a switch-on state, and each chevron engaging projection 17 engages with the adjacent chevron engaging recess 18 shifted by one pitch. At the end, this switch-on state is stably held (locked).

When the dog 7 is turned in the reverse direction from the switch-off position, the above operation is performed in reverse, and the switch 7 returns to the original switch-off state.

It should be noted that the present invention is not limited to a mode in which the operating portion of the dog 7 is rotated by a key,
As shown in FIG. 3, an operating member 19 provided with a knob 19a is connected to the dog 7 to form an operating section, and the dog 7 is directly finger-operated.
Can also be implemented with a structure that rotates.

Also, contrary to the above embodiment, the cam member 8
A pair of chevron engagement projections are provided as engagement portions on the
It is also possible to provide the dog 7 with a chevron engaging recess as an engaging portion. Further, the number of the chevron engagement protrusions and the chevron engagement recesses can be arbitrarily set in accordance with the rotation operation angle of the dog 7. For example, two switch bodies are provided, and the clockwise direction is centered on the return position. One switch body may be turned on by turning the switch body 45 degrees, and the other switch body may be turned on by turning the switch body 45 degrees counterclockwise around the return position.

[0036]

As is clear from the above description, the following effects can be expected according to the present invention.

According to the first aspect of the present invention, the rotating member and the cam member, which are in contact with the push button of the switch body, can stably hold the rotating member at each operation position. This eliminates the need for a plunger or base, thereby reducing the number of parts and reducing the overall size.

According to the second aspect of the invention, it is possible to sufficiently provide a click feeling at the time of operation, and it is possible to use the device with a suitable operation feeling.

According to the third aspect of the present invention, the lock can be applied at the same time as the switch is turned on, and there is no possibility that the operation is stopped without the lock, so that the safety is enhanced.

According to the fourth aspect of the present invention, compactness in the direction along the rotation axis, that is, so-called short body can be achieved, and the panel can be easily attached to a thin control panel having a small depth. become.

According to the fifth aspect of the present invention, the cam member can be smoothly displaced only in the direction along the rotation axis, and stable operation performance can be maintained.

According to the sixth aspect of the present invention, a part of the switch operating surface on the lower surface of the flange of the rotating member is formed as a switch operating surface for notching upward and returning the push button to return. The length in the up-down direction can be reduced, and the length of the operation type switch can be further reduced.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a switch-off state of an operation type switch according to the present invention.

FIG. 2 is an external perspective view of an operation type switch according to the present invention.

FIG. 3 is an exploded perspective view showing main components.

FIG. 4 is an explanatory diagram showing a switch operation process.

FIG. 5 is a longitudinal sectional view showing another embodiment of the operable switch according to the present invention.

FIG. 6 is a longitudinal sectional view showing a switch-off state of a conventional operable switch.

FIG. 7 is an explanatory view showing a switch operation process using a conventional operation type switch.

[Explanation of symbols]

 Reference Signs List 7 Dog (rotating member) 8 Cam member 10 Switch body 10a Push button 17 Engagement portion (angle-shaped engagement protrusion) 18 Engagement portion (angle-shaped engagement concave portion) S Switch operation surface

Claims (6)

[Claims] 1. An operation switch for switching a contact of a switch body by a rotation operation of an operation unit, wherein a rotation member that rotates in response to the rotation operation of the operation unit pushes the switch body. Forming a switch operation surface for abutting the button and pushing and displacing and returning the push button, and a cam member for engaging and holding the rotating member at an ON position and an OFF position of the switch body; An operable switch characterized by being provided on a member so as to be capable of engaging and disengaging. 2. The rotating member has an engaging portion,
The cam member has an engagement portion that engages with and disengages from the engagement portion in accordance with the rotation of the rotation member, and the engagement depth at the on position and the engagement depth at the off position are substantially the same. The operable switch according to claim 1, wherein the switch is set to: 3. The cam member and the rotating member are stably engaged with each other in a pushed state in which a maximum pressing contact surface of the rotating member on the switch operation surface is in full contact with the push button. The operable switch according to claim 1, wherein the engagement position is set to perform the engagement. 4. The cam member is formed in an annular shape and the engaging portion is formed on an inner periphery of the cam member while the engaging portion is formed on an outer periphery of the rotating member. The operable switch according to claim 2, wherein the switch is externally fitted to the rotation member so as to be displaceable only in a direction along the rotation axis of the member, and is elastically urged in an engagement direction with the rotation member. 5. The cam member is guided along the rotation axis by engaging a projection provided on the outer periphery of the cam member with a guide groove formed on the inner surface of the case and extending along the rotation axis. The operable switch according to claim 4. 6. The rotating member has a flange on a lower outer periphery thereof, the engaging portion is formed on an upper surface of the flange, and a lower surface of the flange is used as the switch operation surface. 6. The operable switch according to claim 4, wherein a part of the switch operation surface is cut out upward to reach the engagement portion, and the push button is displaced by the switch operation surface cut out upward.