JP2003308756A - Operation switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a control switch with high level safety. <P>SOLUTION: In a separated control switch using under condition that an operation part and a contact part 2 are connected and locked each other with a lock mechanism, a contact of the contact part 2 operates normally only when the contact part 2 is surely locked on the operation part by switching open/close of the contact of the contact part 2 with operating together with action of the lock mechanism (lock lever 4) when the lock mechanism (for example, action of a lock lever 4 or the like) is operated from a unlock position to a lock position and from the lock position to the unlock position. The switch is provided with a mean (for example, blocking member 7 and locking piece 52 of a lock ring) allowing operation of the lock mechanism only under a condition that the operation part 1 is engaged in the contact part 2 and arranged at a fixed position of the contact part 2 and blocking move of the lock mechanism under other conditions. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a separation type operation switch having a structure in which an operating portion and a contact portion are separated, and used in a state where the operating portion and the contact portion are connected and fixed to each other.

[0002]

2. Description of the Related Art Heretofore, a separation type operation switch has been known in which an operation portion and a contact portion are connected and fixed to each other by operating a lock mechanism.

In such a separation type operation switch, for example, as shown in FIGS. 18 and 19, an operation portion 201 having a push button or the like is fitted into an attachment hole (not shown) of the attachment panel 101 from the panel surface side, The operation portion 201 is fixed to the attachment panel 101 using the lock nut 203 from the rear surface side of the attachment panel 101, and then the contact portion 202 is attached to the operation portion 2.
01, the contact part 202 is fixed to the operation part 201 by operating the lock mechanism to the lock position with the operation part 201 inserted to the fixed position of the contact part 202.

In the separation type operation switch, a lock mechanism for fixing the operation portion and the contact portion to each other has been conventionally known.
As shown in FIGS. 20A and 20B, by rotating the lock lever 204 provided on the contact portion 202 to the lock position side, the lock ring 205 is rotated, and the lock ring 205 is provided on the lock ring 205. The lock claw 251 is the operation unit 2
There is a mechanism for fixing (locking) the contact portion 202 to the operation portion by fitting it into the lock groove 211d of No. 01 (see FIG. 18).

Further, as shown in FIG. 21, the contact portion 202
There is also a mechanism in which the lock claw 251 is likewise fitted into the lock groove of the operating portion by rotating itself with respect to the operating portion (not shown) to fix the contact portion 202 to the operating portion.

Further, as shown in FIG. 22, a lock piece 321 having a lock claw 322 at its tip is provided on the contact portion 302 side, while a locking recess 311 is provided on the operating portion 301 side to operate the contact portion 302. When it is fitted into the part 301,
There is a mechanism (one-touch method) that fixes the contact portion 302 to the operation portion 301 by hooking the lock claw 322 of the lock piece 321 on the locking recess 311 of the operation portion 301.

[0007]

By the way, according to the above-mentioned locking mechanism shown in FIGS. 20 to 22, there remains a problem that it is difficult to secure reliability in locking the contact portion to the operating portion. .

That is, in the lock mechanism shown in FIG.
There is a possibility that the operator forgets to operate the lock lever 204 (forgets to lock) due to an operator's mistake during the work of mounting the operation switch. In addition, since the lock mechanism of FIG. 22 is a one-touch type, the mounting work may be terminated with the lock being incomplete, and the lock mechanism of FIG. 21 may be incomplete. is there.

Further, according to the lock mechanism shown in FIGS. 20 to 22, after the mounting work is completed (after the lock is completed),
Lock lever 204, contact portion 202 or lock piece 3
There is a possibility that some kind of external force, for example, a force due to catching of wiring or the like may be applied to 21 to release the lock.

When the lock is forgotten, the lock is incomplete, or the lock is released after completion of unintentional work as described above, for example, as shown in FIG. There is a problem that 202 will fall out. In particular, in an emergency stop switch that uses a B contact (normally closed) for the contact portion, it is extremely dangerous if the contact that should be opened due to an emergency operation is not opened.

As a measure for solving the above problems, a method of forming a lock lever or the like of the lock mechanism into a shape and structure that makes it easy to confirm the locked state, or preventing the lock mechanism from being unlocked after the lock is completed. There are methods such as adding a part that has a function to enable it and a function to confirm that it is locked securely, but these methods are completely dependent on the will of the operator. It is insufficient in terms of various safety measures.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a separation type operation switch which has good workability at the time of mounting and high safety.

[0013]

An operation switch according to the present invention comprises a contact portion having a contact, an operation portion for opening and closing the contact of the contact portion, and a lock mechanism provided on the operation portion or the contact portion. The operation section and the contact section are fitted together and the operation section is placed at a fixed position of the contact section, and the operation section and the contact section are fixed to each other by operating the lock mechanism from the unlocked position to the locked position. In the separation type operation switch, the operation of the lock mechanism is allowed only when the operation portion and the contact portion are fitted to each other and the operation portion is arranged at a fixed position of the contact portion, It is sometimes characterized by the fact that means are provided to prevent movement of the locking mechanism.

According to the operation switch of the present invention, the lock mechanism can be operated only when the operation portion and the contact portion are fitted to each other and the operation portion is arranged at the fixed position of the contact portion. The contact portion can be locked to the operation portion by operating the lock release position to the lock position. On the other hand, before the contact part is attached to the operation part, the operation of the lock mechanism is restricted by the blocking means, so that the lock mechanism does not move even if some external force acts on the lock mechanism, and the lock mechanism is always locked. It is held in the release position. Therefore, at the time of mounting, it is not necessary for the operator to confirm whether or not it is in the unlocked position, and workability at the time of mounting is improved.

The operation switch of the present invention comprises a contact portion having a contact, an operation portion for opening and closing the contact of the contact portion, and a lock mechanism provided at the contact portion, and the operation portion and the contact portion are fitted to each other. In a state where the operating portion is also arranged at a fixed position of the contact portion, a separate type operation switch for fixing the operating portion and the contact portion to each other by operating the lock mechanism from the unlocked position to the locked position, Means for switching the opening / closing of the contacts of the contact portion in conjunction with the operation of the lock mechanism when the lock mechanism is operated from the unlocked position to the locked position and from the locked position to the unlocked position; The operation of the lock mechanism is permitted only when the operation portion is placed in a fixed position of the contact portion by fitting the contact portion, and the movement of the lock mechanism is prevented in other states. And means (e.g. the engaging piece 52 of the blocking member 7 and the locking ring 5) to is characterized by being provided.

According to the operation switch of the present invention, when the lock mechanism is operated from the lock release position to the lock position and from the lock position to the lock release position, the opening / closing of the contact of the contact portion is interlocked with the operation of the lock mechanism. Since the configuration is such that the contact is closed, the contact of the contact operates normally only when the contact is reliably locked in the operation part. Therefore, it becomes possible to electrically monitor the quality of the locked state.

When the B contact is used as the contact portion, the B contact is in the ON state only when the lock mechanism is set to the lock position, and in other cases, for example, the lock is forgotten or the lock is incomplete. Alternatively, when a lock failure such as unlocking after completion of work occurs, the B contact of the contact portion is always opened. Therefore, the safety can be confirmed in advance.

Further, in the operation switch of the present invention, the lock mechanism can be operated only when the operation portion and the contact portion are fitted to each other and the operation portion is arranged at a fixed position of the contact portion, and in other states. In this case, the movement of the lock mechanism is blocked, so if, for example, the contact part is unlocked → the contact part comes off from the operating part after the contact part has been attached, The locking mechanism of the dropped contact portion is fixed at the unlocked position. Therefore, even if some external force acts on the lock mechanism of the contact portion that has fallen off the operation portion, the lock mechanism does not move and the contact of the contact portion does not switch.

For example, when the B contact is used as the contact, the B contact of the contact is opened when the lock of the contact is released, and then the contact is dropped for some reason. Also, the B contact is kept open. further,
Even if an external force is applied to the locking mechanism of the dropped contact portion, the locking mechanism does not move, and the B contact of the contact portion is kept in the open state, so that there is no risk of danger.

[0020]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

First, a separate type emergency stop switch to which the present invention is applied will be described with reference to FIGS.

The emergency stop switch shown in FIG. 1 comprises an operating portion 1, a contact portion 2 and a lock nut 3.

The operation unit 1 includes a cylindrical operation unit body 11 and
An operating shaft (not shown) having an operating plate 12 is provided,
The operation shaft is slidably fitted in the operation portion main body 11. The operating shaft is biased forward by a return spring (not shown), and the push button 13 is attached to the front end of the operating shaft.
Is provided.

A flange portion 11a and a male screw portion 11b are formed on the operation portion main body 11, and the flange portion 11 is formed.
A rubber washer (not shown) is provided on the rear end surface of a.

When mounting the operating portion 1, the front side (front side in the figure) is inserted into the mounting hole 102 of the mounting panel 101, and the rear end surface (rubber washer) of the flange portion 11a of the operating body 11 is attached to the surface of the mounting panel 101. The lock nut 3 is fixed to the mounting panel 101 by screwing the lock nut 3 into the male screw portion 11b from the back surface side of the mounting panel 101 and tightening the male screw portion 11b. Male screw part 1 of operation part main body 11
A plurality of fixed guide grooves 11c and a lock groove 11d communicating with the fixed guide grooves 11c and extending in the circumferential direction are formed on the rear side of 1b.

The contact portion 2 is composed of a connecting unit 21 and a contact unit 22.

The connecting unit 21 is provided with a substantially cylindrical fitting recess 20 into which the distal end portion of the operating portion main body 11 can be inserted. Inside the connection unit 21,
A plurality of protrusions 21a, ..., 21a fitted in the fixed guide groove 11c of the operation portion 1 and a lock ring 5 rotatable about the unit central axis are provided. Lock ring 5
A lock lever 4 is integrally formed with the lock lever 4 protruding outside the connecting unit 21. Further, on the inner peripheral portion of the lock ring 5, lock claws 51 that can be fitted into the lock groove 11d of the operation portion 1 are integrally formed.

The lock claws 51, ...
It is provided in a number / positional relationship corresponding to the internal projections 21a, and each lock claw 51 corresponds to each other when the lock lever 4 is placed in the unlocked position (the position shown by the chain double-dashed line in FIG. 2). When the lock lever 4 is rotated to the lock position in conformity with the protrusion 21a, the protrusion 21a moves to a position displaced in the rotational direction with respect to the protrusion 21a.

The contact unit 22 has a B contact 23 (see FIG. 5).
(Refer to FIG. 3) is built in, and the tip of the holder (contact opening / closing actuator) 24 of the B contact 23 projects to the front side of the connecting unit 21 (FIG. 3). The holder 24 is
The operation portion 1 is provided in a positional relationship corresponding to the operation plate 12, and the tip of the holder 24 faces or abuts the operation plate 12 in a state where the contact portion 2 is connected and fixed to the operation portion 1.

The lock lever 4 is provided with an operation hole 4a. For example, when there is not enough space near the lock lever 4 for operating the lock lever 4 with a finger at the time of mounting, the operation hole 4a is fitted with a tool such as a screwdriver into the operation hole 4a to lock the lock lever 4a. Is for rotating.

The above-mentioned emergency stop switch is attached to the panel 10
The procedure for attaching to No. 1 will be described.

First, the operating portion 1 is fitted into the mounting hole 102 of the mounting panel 101 from the front surface side of the mounting panel 101, and the lock nut 3 is screwed into the male screw portion 11b from the rear surface side of the mounting panel 101 to mount the operating portion 1 on the mounting panel 101. Fixed to.

Next, the contact portion 2 in which the lock lever 4 is arranged in the unlocked position is arranged on the rear surface side of the mounting panel 101, and the projection 21a of the connecting unit 21 is positioned in the fixed guide groove 11c of the operation portion 1. In the state where the contact portion 2 is inserted into the operation portion main body 11 while being slid by and the contact portion 2 is connected to the operation portion 1, the lock lever 4 in the unlocked position is rotated toward the lock position. By this rotation operation of the lock lever 4, the lock claw 5 of the lock ring 5
1 is fitted in the lock groove 11d of the operation portion 1 to contact the contact portion 2
Is fixed (locked) to the operation unit 1. When the push button 13 of the operation unit 1 is pressed in the above-described connected / locked state, the holder 24 of the contact unit 2 is pressed by the operation plate 12 of the operation shaft, and the B contact 23 built in the contact unit 22 is released. O
The state becomes FF.

Next, the characteristic part of this embodiment will be described with reference to FIGS.
Will be described with reference to.

FIG. 4 and FIG. 5 are views showing the configuration of the characteristic portion of this embodiment. FIG. 6 is an enlarged view of the X portion of FIG. 5A and 5B show an unlocked state and a locked state, respectively.

First, in this embodiment, the contact portion 2
The cam 6 is formed on the lock ring 5 provided in the connecting unit 21 so that the B contact point 23 in the contact point unit 22 is opened when the lock lever 4 is in the unlocked position. The details will be described below.

The cam 6 is for pressing the holder 24 of the B contact 23 arranged at the contact portion 2 against the elastic force of the compression coil spring 25, and the cam 6 and the holder 24 of the B contact 23. The positional relationship with the operation plate 12 is as shown in FIG.

The cam 6 has the lock ring 5 as described above.
It is formed in the
When the cam 6 rotates in conjunction with this and the lock lever 4 is placed in the unlocked position, the holder 24 of the B contact 23 is pushed by the pushing surface 61 of the cam 6 as shown in FIG. 5 (A). As a result, the B contact 23 is set to the open state (OFF state). On the other hand, when the lock lever 4 is rotated from the unlocked position to the locked position, the cam 6 is rotated in conjunction with this, and when the lock lever 4 reaches the completely locked position, the holder of the B contact 23 is locked. 24 is the pressing surface 6 of the cam 6
After being completely deviated from 1, the B contact 23 is switched from the OFF state to the ON state as shown in FIG. 5 (B).

In addition, such a completely locked state (see FIG. 5)
From (state of (B)), when the lock lever 4 is rotated toward the unlocked position in the direction opposite to the locked state, the tip end surface of the holder 24 is moved by the inclined surface 62 of the cam 6 to the compression coil spring 25. When pressed against the elastic force, the B contact 23 is opened and switched to the OFF state in the pressing process, and when the lock lever 4 is rotated to the unlocked position, the state shown in FIG. Return.

Next, the operation of this embodiment will be described with reference to FIGS.
Will be described with reference to.

First, as shown in FIG. 7A, the contact portion 2
In the state in which is not attached to the operation unit 1 (lock release state), the B contact 23 in the contact unit 22 is always kept in the open state (OFF state). Therefore, even if the contact unit 22 is connected to the wiring to be in the energizable state, no safety problem occurs.

Next, as shown in FIG. 7B, the operation unit 1
When the lock lever 4 is firmly rotated to the lock position (completely locked position) with the contact portion 2 fitted in the operation portion main body 11, the contact portion 2 is fixed to the operation portion 1 (lock).
At the same time, the tip of the holder 24 of the B contact 23 is completely removed from the pressing surface 61 of the cam 6, and the B contact 23 becomes OF.
The F state switches to the ON state.

As described above, in this embodiment, the B contact point 23 in the contact point unit 22 is turned on only when the lock lever 4 is placed in the lock position in the normal state.

On the other hand, if the operation of the lock lever 4 is forgotten (forgetting to lock) after the contact portion 2 is fitted into the operation portion main body 11 of the operation portion 1, or the operation of the lock lever 4 is performed, for some reason. When the locked state becomes incomplete due to the contact unit 22 as shown in FIG.
The inside B contact 23 is kept in the open state (OFF state). Therefore, it is possible to electrically check the lock failure in advance, for example, at the time of confirming the operation after finishing the mounting work and the wiring work in the lock failure state, so that there is no danger.

Further, when some external force acts on the lock lever 4 after the lock is completed (completely locked) in the normal state as shown in FIG. 7B, for example, a force due to a catch of wiring or the like acts. When the lock lever 4 moves, the cam 6 rotates with the movement of the lock lever 4, and the B contact 23 in the contact unit 22 is opened. Therefore, also in this case, there is no problem in terms of safety.

As described above, in this embodiment,
Only in the completely locked state, that is, when the contact portion 2 is reliably locked to the operation portion 1, the B contact 23 in the contact portion 2 operates normally, so that the quality of the locked state is electrically monitored. It will be possible. Moreover, the B contact 23 of the contact portion 2 is turned on only when the lock position is set to the normal lock position. In other cases, for example, the lock is forgotten, the lock is incomplete, or the lock is released after the work is completed. If a lock failure such as
Since the contact 23 is always opened, safety can be sufficiently ensured.

In this embodiment, the lock mechanism is provided on the contact portion side, but the present invention is not limited to this and is also applicable to an operation switch having a lock mechanism on the operation portion side.

Next, the characteristic portion related to the operation lock of the lock lever will be described with reference to FIGS.

In this embodiment, the connecting unit 21
The blocking member 7 is provided in the lower part of the. The blocking member 7 is housed in a guide recess 21b formed in the coupling unit 21, and can be slid along the guide recess 21b in the front-rear direction of the coupling unit 21 (the insertion / removal direction of the operation unit 1). ing. A stopper 21 for restricting the forward movement of the blocking member 7 is provided on the front side of the guide recess 21b.
c is provided.

The blocking member 7 includes a main body 70 having a spring accommodating portion 71 formed therein, a restricting piece 72 projecting forward from the tip of the main body 70, and an inner side of the connecting unit from the rear end of the main body 70. The hook piece 73 protruding to the front is integrally formed.

A compression coil spring 8 is arranged in the spring accommodating portion 71 of the blocking member 7, and the blocking member 7 is pressed forward by the elastic force of the compression coil spring 8.
Also, as shown in FIG. 10, the restriction piece 72 of the blocking member 7 projects in front of the stopper 21c. And the stopper 21
The restricting piece 72 protruding from c hits the locking piece 52 formed integrally with the lock ring 5 to
Is prevented from rotating.

Further, as shown in FIGS. 11 and 14, the positional relationship between the blocking member 7 and the operating portion 1 to be inserted into the connecting unit 21 is such that the distal end of the operating portion main body 11 is in the process of inserting the operating portion 1. The positional relationship is such that it hits the hook piece 73 of the blocking member 7.

With the operation of the blocking member 7 having the above structure,
The operation of this embodiment will be described.

First, when the contact portion 2 is not attached to the operation portion 1, the restricting piece 72 of the blocking member 7 is moved forward of the stopper 21c by the elastic force of the compression coil spring 8 as shown in FIGS. The restriction piece 72 restricts the movement of the locking piece 52 of the lock ring 5 to prevent the lock lever 4 from moving.

Next, when the contact portion 2 is attached, as shown in FIG.
As shown in, the operation unit 1 fixed to the mounting panel 101.
With the connecting unit 21 of the contact portion 2 positioned in,
The contact portion 2 is slid forward and the operation portion 1 is inserted into the connecting unit 21 of the contact portion 2. In this insertion process, the tip of the operation portion main body 11 hits the hook piece 73 of the blocking member 7 arranged in the coupling unit 21, and from this time point, the blocking member 7 resists the elastic force of the compression coil spring 8 and is located behind the coupling unit 21. Pushed to the side.

Then, at the time when the tip portion of the operation portion main body 11 is inserted to the fixed position of the connecting unit 21, FIG.
As shown in FIG. 14, the tip of the restricting piece 72 of the blocking member 7 is located rearward of the tip of the engaging piece 52 of the lock ring 5, and the restricting piece 72 restricts (locks) the engaging piece 52. Is released, and the lock lever 4 can be operated.
In this state, the lock lever 4 is rotated from the unlocked position toward the locked position to fix the contact portion 2 to the operation portion 1.

After the above-mentioned mounting work (complete lock) is completed, when some external force acts on the lock lever 4, for example, a force due to catching of wiring or the like acts to move the lock lever 4 to the unlocked position and to make contact. When the lock of the part 2 is released, the contact part 2 may drop off from the operation part 1. Even if such a drop occurs, the B contact 23 of the contact part 2 is opened as described above. There is no safety problem because it will be in a state.

In addition, when the contact portion 2 falls off, that is, when the operating portion 1 comes off from the contact portion 2, the blocking member 7 is restricted by the elastic force of the compression coil spring 8 as shown in FIG. Returning to 10), the rotation of the lock ring 5 is restricted, and the lock lever 4 is fixed to the unlocked position, so that the lock lever 4 moves even if an external force acts on the lock lever 4 of the dropped contact portion 2. Without contact point 2
The B contact 23 is maintained in the open state. Therefore, even if the contact portion 2 comes off, no danger occurs, and the safety can be further improved.

In the above embodiment, an example of the operation switch to which the lock mechanism having the lock lever is applied has been shown, but the present invention is not limited to this, and for example, a slide type lock using a lock plate is used. The present invention can also be applied to an operation switch equipped with various lock mechanisms that are generally used for this type of separation type operation switch, such as a mechanism.

For example, in the case of a lock mechanism using a lock plate, as shown in FIGS. 16A and 16B, the lock plate 114 is provided with a locking recess 114a,
The lock plate 114 is engaged with the locking recess 114a.
The blocking member 117 for blocking the movement of the blocking member 117 is slidably provided on the contact portion 2, and the blocking member 117 is inserted only when the tip portion of the operation portion main body 11 is inserted to the fixed position of the contact portion 2.
Comes off the lock plate 114 and the lock plate 11
4 can be operated, and in other states, the blocking member 117 can block the movement of the lock plate 114.

As another structure, as shown in FIGS. 17A and 17B, a blocking member 127 having a sliding recess 127a into which the end of the lock plate 124 can be fitted is provided as a contact portion. 2 is slidably provided, and when the tip portion of the operation portion main body 11 is inserted to the fixed position of the contact portion 2, the slide recess 127a is aligned with the lock plate 124 and the lock plate 124 can be operated. In other cases, the blocking member 12
7, the lock plate 124 may be prevented from moving.

In the above embodiment, the number of blocking members is one, but the present invention is not limited to this, and a plurality of blocking members may be provided at the contact portion.

Further, by devising the number and arrangement position of the blocking members and the shape of the tip portion of the operating portion main body (the shape of the pressing portion of the blocking member), the operating portion and the contact portion which can be connected / locked. Since it is possible to specify the combination of, the blocking member can have a key function.

In the above embodiment, an example in which the contact point is provided with the B contact point has been described, but the present invention is not limited to this.
It can also be applied to an operation switch having an A contact (normally open) on the contact part.

Further, the present invention is applicable to push-lock turn-reset type push button switches used for emergency stop, as well as various separated type operation switches such as illuminated push button switches or selector switches.

[0066]

As described above, according to the operation switch of the present invention, the lock mechanism can be operated only when the operation portion and the contact portion are fitted to each other and the operation portion is arranged at the fixed position of the contact portion. Since the lock mechanism is prevented from moving in any other state, the lock mechanism does not move even if some external force is applied to the lock mechanism before the contact part is attached to the operation part. It is always held in the unlocked position. Therefore, it is not necessary for the operator to confirm whether or not it is in the unlocked position at the time of mounting the contact portion, and workability at the time of mounting is improved.

In the operation switch of the present invention, when the lock mechanism for fixing the operation portion and the contact portion is operated, the contact of the contact portion is opened / closed in conjunction with the operation of the lock mechanism. Therefore, the contact of the contact portion operates normally only when the contact portion is securely locked in the operation portion. Therefore, it becomes possible to electrically monitor the quality of the locked state. Further, when the B contact is used as the contact portion, the B contact is turned on only when the lock mechanism is set to the lock position, and in other cases, for example, forgetting to lock, incomplete lock or work. When a lock failure such as unlocking after completion occurs, the B contact of the contact portion is always opened, so that a safety problem does not occur.

Further, the lock mechanism can be operated only when the operation portion is arranged at a fixed position of the contact portion, and the movement of the lock mechanism is prevented in other states, so that the attachment of the contact portion is completed. After that, even if the contact part comes off from the operating part for some reason,
The locking mechanism of the dropped contact portion is fixed at the unlocked position. Therefore, even if an external force acts on the locking mechanism of the contact part that has fallen off, the contacts of the contact part do not switch, and the safety can be improved. In particular, when the B contact is used as the contact part, the B contact of the dropped contact part is maintained in the open state, so that the safety can be further enhanced.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a structure of a separation type emergency stop switch to which the present invention is applied.

FIG. 2 is a front view of a contact portion that constitutes the emergency stop switch of FIG.

FIG. 3 is a side view showing only a contact unit of a contact portion that constitutes the emergency stop switch of FIG.

FIG. 4 is a perspective view showing a main part structure of the embodiment of the present invention.

FIG. 5 is a diagram schematically showing a main part structure of the same embodiment.

6 is an enlarged view of a portion X in FIG.

FIG. 7 is an explanatory view of the operation of the embodiment of the present invention.

FIG. 8 is a diagram for explaining the operation of the embodiment.

FIG. 9 is a perspective view showing a main part structure of the embodiment of the present invention.

FIG. 10 is a perspective view showing a main part structure of the same embodiment.

FIG. 11 is a diagram schematically showing a main part structure of the same embodiment.

FIG. 12 is a perspective view showing a main part structure of the same embodiment.

FIG. 13 is a perspective view showing a main part structure of the same embodiment.

FIG. 14 is a side view showing a main part structure of the same embodiment.

FIG. 15 is a side view showing a main part structure of the same embodiment.

FIG. 16 is a diagram schematically showing a main part structure of another embodiment of the present invention.

FIG. 17 is a diagram schematically showing a structure of a main part of another embodiment of the present invention.

FIG. 18 is an exploded perspective view showing an example of a separation type operation switch.

FIG. 19 is a side view showing the operation switch of FIG. 12 in a mounted state.

FIG. 20 is a diagram schematically showing an example of a lock mechanism of a separation type operation switch.

FIG. 21 is a diagram schematically showing another example of the lock mechanism of the separation type operation switch.

FIG. 22 is a view schematically showing another example of the lock mechanism of the separation type operation switch.

FIG. 23 is an explanatory diagram of a problem of the separation type operation switch.

[Explanation of symbols]

1 Operation part 11 Operation unit body 11a Flange part 11b Male thread 11c Fixed guide groove 11d lock groove 12 Operation plate 13 push button 2 contact points 21 Connection unit 21a protrusion 21b Guide recess 21c Stopper 22 contact units 23 B contact 24 holder 25 Compression coil spring 3 lock nuts 4 Lock lever 5 lock ring 51 lock claws 52 Locking piece 6 cams 61 Pressing surface 62 Inclined surface 7 Blocking member 70 Main body 71 Spring housing 72 Restricted piece 73 hook pieces 8 compression coil spring 101 mounting panel 102 mounting holes

Claims (2)

[Claims] 1. A contact part having a contact, an operating part for opening and closing the contact of the contact part, and a lock mechanism provided on the operating part or the contact part, and the operating part and the contact part are fitted to each other. With the operating part in place at the contact part,
In a separation type operation switch for fixing the operation unit and the contact unit to each other by operating the lock mechanism from the unlocked position to the lock position, the operation unit and the contact unit are fitted to each other to connect the operation unit to the contact unit. An operation switch comprising means for allowing the operation of the lock mechanism only when the lock mechanism is in the fixed position and for preventing the lock mechanism from moving in the other states. 2. A contact part having a contact, an operating part for opening and closing the contact of the contact part, and a lock mechanism provided in the contact part, and the operating part is fitted with the operating part to fit the operating part. In a separation type operation switch that locks the operation unit and the contact unit with each other by operating the lock mechanism from the unlocked position to the locked position in a state where the lock mechanism is arranged at the fixed position. When operating from the release position to the lock position and from the lock position to the lock release position, the operation section and the contact section are fitted with a means for switching the opening / closing of the contact of the contact section in conjunction with the operation of the lock mechanism. In addition, means for permitting the operation of the lock mechanism only when the operation portion is arranged at a fixed position of the contact portion and for preventing the movement of the lock mechanism in other states are provided. Operation switches, characterized in that there.