JP4434877B2 - Push button switch - Google Patents

Description

  The present invention relates to a pushbutton switch that can be suitably implemented in an emergency stop pushbutton switch or the like.

Conventionally, for example, a control panel of a machine tool has been provided with a push button switch for emergency stop as a safety device. By pushing this push button switch in an emergency, the power supply to the main circuit of the machine is cut off. The operation can be stopped.
As a prior art of such an emergency stop pushbutton switch, a structure in which a cover is attached to the switch is known (Japanese Patent Laid-Open Nos. 9-19015 and 60-115423).

  The principle of the locking operation of the emergency stop pushbutton switch having a structure in which a cover is attached to this type of switch will be described with reference to FIG. During the operation of the machine tool, the cover 100 is in an open state (FIG. 11 (1)). When the machine tool is stopped, the push button 101 is pushed in, and the cover 100 is closed in this state to push the push button 101. Cover. And it locks with the padlock 102 (FIG. 11 (2)). Thereby, unless the padlock 102 is released, the machine tool does not operate, and an unexpected disaster can be prevented.

JP-A-9-19015 Japanese Utility Model Publication No. 60-115423

  However, the pushbutton switches described in Patent Documents 1 and 2 require a separate part (cover) other than the switch, which increases costs.

  In addition, when the switch is pressed for emergency stop of the machine in an emergency, if there is a cover near the switch, the cover interferes with the operability of the switch. Since the operability is inferior in this way and the operation timing of the switch is delayed, a serious accident is caused. Therefore, it is desirable that there is nothing in the vicinity of the switch.

  The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a pushbutton switch that does not require a separate part other than the switch and improves the operability of the switch. is there.

In order to achieve the above object, the invention according to claim 1 of the present invention is a push button switch including an operation button portion and an operation shaft for opening and closing a switch contact in conjunction with the operation button portion. A cylindrical casing having an insertion hole through which the operation shaft is inserted, and a lock operation that is mounted on the upper surface of the cylindrical casing and has an insertion hole through which the operation shaft is inserted, and is rotatable around the axis of the cylindrical casing The lock operation member is rotated to a predetermined position with the member and the operation shaft pushed in, and the operation shaft and the lock operation member are engaged to lock the movement of the operation shaft in the axial direction. have a, and engagement means and the engagement means and the engagement projection formed on either one of the outer peripheral surface of the inner peripheral surface or the operating shaft of the lock operation member, the inner peripheral surface of the lock operation member Or the outer peripheral surface of the operating shaft An engagement groove formed on the other, into which the engagement protrusion is fitted, and is constituted by a longitudinal groove portion and a lateral groove portion extending in the circumferential direction from the upper portion of the longitudinal groove portion; and When the operation shaft is not pushed in, the engagement protrusion is located in the vertical groove portion, and in the state where the operation shaft is pushed in, the engagement protrusion is at the same height as the lateral groove portion. And

  As described above, the movement of the operation shaft in the axial direction can be locked by rotating the lock operation member to a predetermined position while the operation shaft is pushed in. Accordingly, it is possible to prevent the operation shaft from being returned to the normal state where it is not pushed. As a result, for example, in the case of an emergency stop switch of a pull reset method, it is possible to prevent the operating axis from being erroneously returned and the machine tool or the like to be in an operating state. In order to further improve the safety, the rotation of the lock operation member may be regulated by a lock or the like.

Further, since the operation shaft and the lock operation member are engaged by the engaging means and the movement of the operation shaft in the axial direction is locked, another member such as a cover as in the conventional example. Do not need. Therefore, the cost can be reduced as compared with the conventional example, and the operability during an emergency stop is improved.
In addition, with the above configuration, when the operation shaft is pushed in while the operation shaft is not pushed in, the engagement protrusion is at the same height as the lateral groove, so that the lock operation member is allowed to rotate to a predetermined position. It becomes. Therefore, it is possible to lock the movement of the operation shaft in the axial direction by rotating the lock operation member to a predetermined position and fitting the engagement protrusion into the lateral groove.

The invention according to claim 2 is a push button switch comprising an operation button portion and an operation shaft for opening and closing a switch contact in conjunction with the operation button portion, and an insertion hole through which the operation shaft is inserted. A cylindrical casing, a lock operating member that is mounted on an upper surface of the cylindrical casing and through which the operation shaft is inserted, and that is rotatable about the axis of the cylindrical casing; and the operation shaft is pushed in And engaging means for engaging the operating shaft and the lock operating member and rotating the operating shaft in the axial direction by rotating the lock operating member to a predetermined position. The engaging means includes an engagement protrusion formed on either the inner peripheral surface of the lock operation member or the outer peripheral surface of the operation shaft, and either the inner peripheral surface of the lock operation member or the outer peripheral surface of the operation shaft. Formed on the other side, An engaging groove into which the mating protrusion is fitted, and has such a vertical groove part and a horizontal groove part extending in the circumferential direction from the lower part of the vertical groove part, and the operation shaft is pushed in When the engagement protrusion is in the same height position as the lateral groove, the lock operation member is rotated in the opposite direction from the predetermined position, and the operation shaft is pushed in, the engagement protrusion is vertical. It is located in a groove part .

With the above configuration, the movement of the operation shaft in the axial direction can be set to the locked state in a normal state where the operation button unit is not pushed in. Therefore, the present invention can be applied to a start switch or the like that needs to be locked in a normal state where the operation button unit is not depressed.
Further, with the above configuration, since the engaging projection is at the same height position as the lateral groove portion when the operation shaft is not pushed in, the lock operation member is allowed to rotate to a predetermined position. Therefore, it is possible to lock the movement of the operation shaft in the axial direction by rotating the lock operation member to a predetermined position and fitting the engagement protrusion into the lateral groove. Note that when the operation button portion is pushed in, the lock operation member is rotated in the opposite direction from the predetermined position to release the lock state of the operation shaft. Thereby, it becomes possible to push in the operation button part.

According to a third aspect of the present invention, there is provided a pushbutton switch comprising an operation button portion and an operation shaft for opening and closing a switch contact in conjunction with the operation button portion, and the insertion hole through which the operation shaft is inserted. And a lock operation member that is mounted on an upper surface of the cylindrical casing and has an insertion hole through which the operation shaft is inserted, and is rotatable around the axis of the cylindrical casing. A flange having a locking hole is formed in each of the member and the cylindrical casing, and the locking operation member is inserted into the locking operation member and each locking hole of the cylindrical casing in a state where the operation shaft is pushed in. between engaged with the operating shaft and the lock operation member by Rukoto rotate operation to a predetermined position where overlapping, by attaching the lock to the locking hole to each other in this state, the operating shaft Wherein the rotational direction, characterized in that the rotational movement in the opposite direction to the locked state.

As described above, by attaching a lock between the locking holes, the rotation of the operating shaft in the direction opposite to the rotation direction can be locked. Can also be applied.
The invention according to claim 4 is the pushbutton switch according to claim 3, wherein an engagement protrusion is formed on either the inner peripheral surface of the lock operating member or the outer peripheral surface of the operating shaft. An engagement groove into which the engagement protrusion is fitted is formed on either the inner peripheral surface of the lock operation member or the outer peripheral surface of the operation shaft. The engagement groove includes a vertical groove portion and a vertical groove portion. The engaging protrusion is positioned in the longitudinal groove when the operation shaft is not pushed in, and the engaging protrusion is the transverse groove when the operation shaft is pushed in. When the operating shaft is pushed in, the locking operation member is rotated to a predetermined position where the locking operation member and the locking holes of the cylindrical casing are overlapped with each other. Fit into the horizontal groove and lock Member is engaged, characterized in that.
The invention according to claim 5 is the pushbutton switch according to claim 3 or 4, wherein the switch contact is provided in the switch body, and the operation shaft is pushed into the switch body in the axial direction. A lock mechanism that locks the movement of the actuator is built in, and when the operation shaft is pushed in, the movement in the axial direction is locked by the lock mechanism, and when the operation shaft is returned, the operation shaft is moved to the lock operation member. By rotating in the direction opposite to the rotation direction, the locked state of movement in the axial direction is released, and the operation shaft moves in the direction opposite to the pushing direction and returns to the original state. It is characterized by.

The invention according to claim 6 is the pushbutton switch according to claim 1 or 2 , wherein the lock operation member and the cylindrical casing are respectively formed with flanges having lock holes, and the lock operation switch The flange of the member and the flange of the cylindrical casing are disposed in advance at a position where the lock holes overlap at the predetermined position when the lock operation member is rotated to the predetermined position. A lock is attached to the locking holes at predetermined positions.

  As described above, by attaching the lock to the locking holes, the rotation of the lock operating member is restricted, and thereby the push button switch is more completely locked and the safety is improved.

  According to the present invention, the operation shaft and the lock operation member are engaged by the engagement means, and the movement of the operation shaft in the axial direction is locked. No other parts such as are required. Therefore, the cost can be reduced and the operability at the time of emergency stop is improved as compared with the conventional example.

  Hereinafter, a pushbutton switch according to the present invention will be described in detail based on embodiments. Note that the present invention is not limited to the following embodiments.

(Embodiment 1)
1 is a front view showing an overall configuration of a pushbutton switch according to Embodiment 1, FIG. 2 is a plan view thereof, FIG. 3 is a sectional view taken along line AA in FIG. 1, and FIG. FIG. 5 is a developed circumferential view of an operation shaft provided in the push button switch, FIG. 5 is a longitudinal sectional view of the push button switch, and FIG. 6 is an exploded perspective view of the push button switch. In the following description, the pushbutton switch is an emergency stop pushbutton switch, and a turn reset type switch is taken as an example.

The push button switch 1 is attached to, for example, the control panel 2. The push-button switch 1 comprises a switch body 3 having a switcher switch contacts, an operation unit 4. The operation unit 4 includes an operation button unit 5 and an operation shaft 6 that is formed integrally with the operation button unit 5 and performs opening / closing operation of the switch contact. In the present embodiment, the operation button unit 5 and the operation shaft 6 are integrally formed, but may be separate members. In short, the operation shaft 6 may be configured so as to be interlocked with the pressing operation of the operation button unit 5.

  The cylindrical casing 10 formed on the control panel 2 has an insertion hole 11 through which the operation shaft 6 is inserted, and a flange 13 having a lock hole 12 is formed. In the present embodiment, the casing 10 is cylindrical, but it may be rectangular or elliptical. A lock operation member 14 for locking the operation shaft 6 is mounted on the upper surface of the cylindrical casing 10 so as to be rotatable around the axis of the cylindrical casing 10. The lock operation member 14 includes a disk-shaped main body portion 16 having an insertion hole 15 through which the operation shaft 6 is inserted, and a flange 17 protruding outward from the outer periphery of the main body portion 16. A locking hole 18 similar to the locking hole 12 of the cylindrical casing 10 is formed in the flange 17. A pair of engaging protrusions 20 and 20 are formed on the inner peripheral surface of the main body 16 with an interval of 180 degrees in the circumferential direction.

  On the other hand, a pair of engagement grooves 21 and 21 are formed on the outer peripheral surface of the operation shaft 6 at intervals of 180 degrees in the circumferential direction corresponding to the engagement protrusions 20 and 20. The engaging groove 21 is formed in a substantially inverted L shape, and includes a vertical groove portion 21A and a horizontal groove portion 21B extending in the circumferential direction from the upper portion of the vertical groove portion 21A. The width of the vertical groove 21A (the length along the circumferential direction) is the same as the width of the engaging protrusion 20 (the length along the circumferential direction). It is set to the length with the minutes added. Therefore, when the engagement protrusion 20 is positioned below the vertical groove portion 21A, the operation shaft 6 is allowed to move in the axial direction (vertical direction), and the lock operation member 14 moves in the Y1 direction. The rotation to a predetermined position is restricted. Further, when the operating shaft 6 is pushed in the axial direction and the engaging projection 20 is at the same height as the lateral groove 21B, the lock operating member 14 is allowed to rotate to a predetermined position in the Y1 direction. .

  When the locking operation member 14 is rotated in the Y1 direction and the engagement protrusion 20 is positioned in the lateral groove portion 21B, the flange 13 so that the locking hole 12 and the locking hole 18 overlap. And the operation position of the operation unit 17 are set in advance.

  The cylindrical casing 10 is formed with a storage groove 25 that opens upward, and a torsion coil spring 26 is disposed in the storage groove 25. One end of the torsion coil spring 26 is fixed to the lock operation member 14, and the other end is fixed to the bottom surface of the storage groove 25, whereby the lock operation member 14 is urged in the direction opposite to the Y1 direction.

  FIG. 7 is a diagram for explaining the operation of the push button switch, in which FIG. 7 (1) is a plan view during normal operation, operation, and locking, FIG. 7 (2) is a front view thereof, and FIG. (3) is a cross-sectional view taken along the line AA in FIG. 7 (2), and FIG. 7 (4) is a diagram showing an engagement state between the engagement protrusion 20 and the engagement groove 21.

  In a normal state in which the operation button portion 5 is not pushed in (for example, during a driving operation of the machine tool), the engagement protrusion 20 is positioned in the longitudinal groove portion 21A, so that the lock operation member 14 reaches a predetermined position in the Y1 direction. Although the rotation is prevented, the movement of the operation shaft 6 in the axial direction is allowed. In this state, in order to stop the operation of the machine tool, when the operation button unit 5 is pushed, the power supply to the main circuit of the machine tool is cut off and the operation stops. Then, when the operation button portion 5 is pushed in, the engaging protrusion 20 and the lateral groove portion 21B are at the same height position, and the lock operation member 14 is allowed to rotate to a predetermined position in the Y1 direction.

  When the lock operation member 14 is rotated in the Y1 direction against the rotational force of the torsion coil spring 26, the engagement protrusion 20 is fitted into the lateral groove portion 21B. At this time, since the locking hole 12 and the locking hole 18 are overlapped with each other, the padlock 30 is hung on the locking holes 12 and 18 and locked as shown in FIG. Thereby, the lock operation member 14 and the operation shaft 6 are restricted from rotating in the direction opposite to the Y1 direction. As a result, the stop state of the machine tool is safely maintained. In place of the padlock 30, a latch (HASP) may be used. When the padlock 30 is removed, the lock operation member 14 automatically returns to the longitudinal groove portion 21A by the rotational force of the torsion coil spring 26, and the operation button portion 5 (operation shaft 6) rotates in the direction opposite to the Y1 direction. Can be reset to normal state.

  In the present embodiment, the engagement protrusions 20 and the engagement grooves 21 are arranged in a pair with an interval of 180 degrees in the circumferential direction, so that even if an unintended operation or the like is performed in the locked state, for example, The locked state can be maintained.

  Moreover, in the pushbutton switch 1 having the above-described configuration, when an emergency stop is required in a normal state (during operation of a machine tool or the like), the operation button unit 5 (operation shaft 6) is pushed in, thereby the main circuit of the machine. The power supply to is cut off and its operation stops. Since there are no parts such as a cover in the vicinity of the operation button unit 5 at the time of the emergency stop, the operability is improved and it is possible to prevent the occurrence of a large disaster due to the operation delay.

  In the above example, the turn reset type emergency stop switch has been described. However, it can also be applied to a pull reset type emergency stop switch. In this case, as shown in FIG. The width of the vertical groove 21A in the groove 21 may be made sufficiently larger than the width of the engagement protrusion 20, and the rotation of the operation button 5 (operation shaft 6) required in the turn reset method. Since it is not necessary to consider the angle, the width of the vertical groove 21A in the engagement groove 21 may be substantially the same as the width of the engagement protrusion 20.

  Note that the locking operation of such a pull reset type emergency stop switch differs from the above-described turn reset type emergency stop switch in the following points. That is, when the locking operation member 14 is rotated in the Y1 direction so that the engaging projection 20 is positioned in the lateral groove portion 21B, the pull resetting method causes the engagement projection 20 to be engaged with the lateral groove portion 21B. Whereas the movement of the operation shaft 6 in the axial direction is restricted, in the turn reset method, regardless of the engagement of the engagement protrusion 20 with the lateral groove portion 21B, the structure of the switch body causes the operation shaft 6 to move. The movement in the axial direction is restricted.

(Embodiment 2)
FIG. 9 is a front view of the pushbutton switch according to the second embodiment, and FIG. 10 is a diagram showing an engagement state between the engagement protrusion and the engagement groove. The push button switch 1 in the present embodiment is an activation switch, and therefore, for safety measures, the push button switch 1 is brought into a locked state at a normal time when the operation button unit 5 is not pushed. Therefore, in this embodiment, the engagement groove 21 is formed in a substantially L shape. At normal times, the engagement protrusion 20 is positioned in the longitudinal groove portion 21 </ b> A of the engagement groove 21 as shown in FIG. 10 (1). Therefore, in order to lock the pushbutton switch 1, the lock operation member 14 is rotated in the Y1 direction so that the engagement groove 21 is fitted into the lateral groove portion 21B. And it locks with the padlock 30.

  For activation, when the push button is pushed, the padlock 30 is unlocked, and the lock operation member 14 is rotated in the direction opposite to the Y1 direction. As a result, the engagement protrusion 20 is positioned in the vertical groove portion 21A, and the movement of the operation shaft 6 in the axial direction is allowed. Next, when the operation button unit 5 (operation shaft 6) is pushed in, an activated state of the machine tool or the like is obtained. In this pushed-in state, the engaging protrusion 20 is positioned above the vertical groove portion 21A (FIG. 10 (2)).

  Even with such a start switch, since there are no parts such as a cover in the vicinity of the operation button unit 5 when pushed, the operability is improved.

  In the above example, as shown in FIG. 9, the width of the vertical groove 21A in the engagement groove 21 is set to be sufficiently larger than the width of the engagement protrusion 20. Similarly to the emergency stop switch, the width of the vertical groove 21A in the engagement groove 21 may be substantially the same as the width of the engagement protrusion 20.

(Other matters)
(1) In the above embodiment, the engagement protrusion 20 is formed on the inner peripheral surface of the lock operation member 14 and the engagement groove 21 is formed on the outer peripheral surface of the operation shaft 6. The engaging groove 21 may be formed on the inner peripheral surface of the lock operating member 14 formed on the outer peripheral surface of the shaft 6.

  (2) The pushbutton switch is applicable not only to the emergency stop switch and the start switch but also to the selector switch. The emergency stop switch may be any one of a turn reset method, a pull reset method, and a turn / pull reset method. In the case of a selector switch, the engagement groove 21 can be an I-shaped groove.

(3) The urging direction of the torsion coil spring 26 may be reversed, and in this way, the structure can be automatically locked when pushed.

(4) In the above embodiment, one flange 13 provided with the locking hole 12 and one flange 17 provided with the locking hole 18 are formed, but a plurality of flanges 13 and 17 are provided in the circumferential direction. A plurality of operators may be locked by the padlock 30 respectively.

  The present invention can be suitably applied to an emergency stop pushbutton switch or the like.

FIG. 1 is a front view showing an overall configuration of a pushbutton switch according to Embodiment 1. FIG. FIG. 2 is a plan view of the pushbutton switch according to the first embodiment. It is arrow AA sectional drawing of FIG. FIG. 3 is a circumferential development view of an operation shaft provided in the first embodiment. 2 is a longitudinal sectional view of a push button switch according to Embodiment 1. FIG. 3 is an exploded perspective view of the push button switch according to Embodiment 1. FIG. It is a figure for demonstrating operation | movement of a pushbutton switch, among these, FIG.7 (1) is a top view at the time of normal time, operation, and a lock | rock, FIG.7 (2) is a front view, FIG.7 (3) is a figure. FIG. 7B is a cross-sectional view taken along the line AA in FIG. 7B, and FIG. 7D is a diagram illustrating an engagement state between the engagement protrusion 20 and the engagement groove 21. It is a figure which shows the state by which the padlock 30 was hung on the locking holes 12 and 18. FIG. 6 is a front view of a pushbutton switch according to Embodiment 2. FIG. FIG. 10 is a diagram illustrating an engagement state between an engagement protrusion and an engagement groove in the pushbutton switch according to Embodiment 2. It is a figure which shows the principle of the lock operation | movement of the pushbutton switch for emergency stops of the structure which attached the cover to the conventional switch.

Explanation of symbols

1: Pushbutton switch 2: Control panel
3: Switch body 4: Operation unit
5: Operation button portion 6: Operation shaft 10: Cylindrical casing 11, 15: Insertion hole 12, 18: Lock hole 13, 17: Flange 14: Lock operation member 16: Main body portion 20: Engagement protrusion 21: Engagement Groove 21A: Vertical groove portion 21B: Horizontal groove portion 30: Padlock

Claims (6)

A pushbutton switch having an operation button part and an operation shaft for opening and closing a switch contact in conjunction with the operation button part,
A cylindrical casing having an insertion hole through which the operation shaft is inserted;
A locking operation member mounted on the upper surface of the cylindrical casing, having an insertion hole through which the operation shaft is inserted, and rotatable around the axis of the cylindrical casing;
The lock operation member is rotated to a predetermined position while the operation shaft is pushed in, thereby engaging the operation shaft and the lock operation member to lock the movement of the operation shaft in the axial direction. A means,
I have a,
The engaging means includes
An engagement protrusion formed on either the inner peripheral surface of the lock operation member or the outer peripheral surface of the operation shaft;
An engagement groove formed on either the inner peripheral surface of the lock operation member or the outer peripheral surface of the operation shaft, into which the engagement protrusion is fitted, and a vertical groove portion and a horizontal groove portion extending in the circumferential direction from the upper portion of the vertical groove portion Such an engaging groove composed of:
Have
The push button is characterized in that the engagement protrusion is positioned in the vertical groove portion when the operation shaft is not pushed in, and the engagement protrusion is at the same height as the horizontal groove portion when the operation shaft is pushed in. switch. A pushbutton switch having an operation button part and an operation shaft for opening and closing a switch contact in conjunction with the operation button part,
A cylindrical casing having an insertion hole through which the operation shaft is inserted;
A locking operation member mounted on the upper surface of the cylindrical casing, having an insertion hole through which the operation shaft is inserted, and rotatable around the axis of the cylindrical casing;
By rotating the lock operation member to a predetermined position in a state where the operation shaft is not pushed in, the operation shaft and the lock operation member are engaged, and the movement of the operation shaft in the axial direction is locked. Engagement means;
I have a,
The engaging means includes
An engagement protrusion formed on either the inner peripheral surface of the lock operation member or the outer peripheral surface of the operation shaft;
An engagement groove formed on either the inner peripheral surface of the lock operation member or the outer peripheral surface of the operation shaft and into which the engagement protrusion is fitted, and a vertical groove portion and a horizontal groove portion extending in the circumferential direction from a lower portion of the vertical groove portion Such an engaging groove composed of:
Have
In the state where the operation shaft is not pushed in, the engaging projection is at the same height position as the lateral groove portion, the lock operation member is rotated in the opposite direction from the predetermined position, and in the state where the operation shaft is pushed in, A push button switch, wherein the engaging projection is located in the longitudinal groove . A pushbutton switch having an operation button part and an operation shaft for opening and closing a switch contact in conjunction with the operation button part,
A cylindrical casing having an insertion hole through which the operation shaft is inserted;
A locking operation member mounted on the upper surface of the cylindrical casing, having an insertion hole through which the operation shaft is inserted, and rotatable around the axis of the cylindrical casing;
Have
The lock operation member and the cylindrical casing are each formed with a flange having a lock hole,
In a state where the operation shaft is pushed, the lock operation member, by engaging the operating shaft and the lock operation member by Rukoto rotate operation to a predetermined position where the locking holes between the lock operation member and the cylindrical casing overlap In this state, the push button switch is characterized in that the lock operation is performed in the direction opposite to the rotation direction of the operation shaft by attaching a lock between the lock holes. An engagement protrusion is formed on either the inner peripheral surface of the lock operation member or the outer peripheral surface of the operation shaft.
An engagement groove into which the engagement protrusion is fitted is formed on either the inner peripheral surface of the lock operation member or the outer peripheral surface of the operation shaft. The engagement groove includes a vertical groove portion and an upper portion of the vertical groove portion. From the lateral groove extending in the circumferential direction,
In the state where the operation shaft is not pushed in, the engagement projection is located in the vertical groove portion, and in the state where the operation shaft is pushed in, the engagement projection is at the same height position as the lateral groove portion,
In a state where the operation shaft is pushed in, the lock operation member is rotated to a predetermined position where the lock operation member and the locking holes of the cylindrical casing overlap each other, so that the engagement protrusion fits into the lateral groove and the operation shaft The push button switch according to claim 3, wherein the lock operating member is engaged . The switch contact is provided in the switch body, and the switch body has a built-in lock mechanism that locks the movement in the axial direction by pushing the operation shaft.
When the operation shaft is pushed in, the movement in the axial direction is locked by the lock mechanism, and when the operation shaft is returned, the operation shaft rotates in a direction opposite to the rotation direction of the lock operation member, thereby The pushbutton switch according to claim 3 or 4, wherein the lock state of the movement in the direction is released and the operation shaft moves in a direction opposite to the pushing direction to return to the original state . The lock operation member and the cylindrical casing are each formed with a flange having a lock hole,
The flange of the lock operation member and the flange of the cylindrical casing are disposed in advance at positions where the lock holes overlap at the predetermined position when the lock operation member is rotated to the predetermined position. together with the lock in the locking holes to each other at a predetermined position is attached, according to claim 1 or 2 pushbutton switch according.