JP4872756B2 - External operation handle device for switch - Google Patents

Description

  The present invention relates to an external operation handle device for operating a switch such as a circuit breaker or an earth leakage circuit breaker incorporated in a control panel or the like from the outside of the front surface of the panel, and in particular, regardless of the presence or absence of a disconnect function of the switch, When the contact of the switch is welded, the device is improved so that it cannot be locked in the OFF position.

  When an electric circuit is opened and closed by a switch, in order to maintain the open (OFF) or closed (ON) state of the electric circuit, for example, a handle lock device or the like is attached to the tilting handle of the switch It is known to restrain the operation of the switch. This is used, for example, to secure the safety of inspection work on the load side of the switch by restraining to the OFF state, or securing the power supply so that the important circuit is not turned off by restraining to the ON state. On the other hand, as an external operation handle device, when the switch is installed on a control panel, for example, the switch is stored on the back side of the panel for convenience of wiring, and the tilting handle is not exposed on the front of the panel. May be configured. In such a configuration, an external operation handle device is added to the switch itself so that it can be operated from the outside of the front of the panel. Further, in the case of a control panel in which the front surface of the control panel is a door, an external operation handle device is provided on the door, and when the door is closed, the external operation handle device can be engaged with the tilting handle for operation. The thing of the structure made like this is known.

  Since this external operation handle device is generally provided with a rotating handle portion that can be operated manually, it is in a so-called rotational motion. On the other hand, as for the switch, it is general that it is a linear motion as can be seen from the name “upside down type”. In other words, it is indispensable to convert the rotary motion into a linear motion for the linkage between the external operation handle device and the switch. As one means, an operating shaft extending from the handle (rotating handle portion) is used. An arm having a rotation center different from the rotation center (that is, the operating shaft) of the crank plate (corresponding to the second rotation member described in the claims) connected via It is known that a tilting handle is connected to a square hole of this arm (for example, see Patent Document 1). As a result, the operation of the switch by the rotary handle part, or when the switch is a wiring breaker, the trip operation is displayed on the rotary handle part. In the configuration disclosed in Document 1, the linear motion of the tilting handle is temporarily converted into a rotational motion by the arm, and this rotational motion is transmitted to another rotational motion by the crank plate. Is referred to as “rotation / rotation motion” for convenience.

  The talk is returned to “restraint”, but it goes without saying that there are cases where the operation of the switch is restrained even when the external operation handle device is mounted as described above. Therefore, a lock plate is attached so that it can be inserted into and removed from the rotating handle part, and when the lock plate is pulled out, the rotating handle part is prevented from rotating, and an operation lock is applied to the extracted part. There is known one provided with a lock hole for attaching a lock (for example, a padlock). That is, an external operation handle device having a configuration in which an operation lock is attached to the lock hole of the lock plate to restrain the operation of the switch is widely distributed.

  By the way, if an overcurrent flows through a switch that is in an energized state, if the switch breaks down and does not trip, the main contact will melt due to the heat generated by the overcurrent energization and remain in the energized state. An abnormal situation occurs. At this time, if the rotating handle part is turned in the OFF direction in an attempt to turn off the circuit breaker without knowing the welding of the main contact, it is inevitable that the tilting handle will fall in the OFF direction. However, it must be avoided that the rotary handle portion reaches the OFF position. As long as the main contact corresponds to the ON state, it is needless to say that the lock plate is not locked in the OFF position, and in particular, to ensure the safety of the load side inspection work. .

  Therefore, paying attention to the fact that the slide base engaged with the tilting handle is restrained together with the tilting handle by the welding in front of the OFF position, this operation is performed when the operation knob is turned to be locked at the OFF position. The lock lever pushed by the turn base connected to the knob engages with the stopper of the body as the slide base is constrained as described above, and prevents further rotation of the operation knob ( For example, see Patent Document 2). In addition, by interposing a handle base between the operation handle and the rotating shaft and providing a biasing spring that always urges the operation handle in the ON direction, even when the operation handle is turned from the ON position to the OFF position during welding, The handle base is restrained by the rocker handle, and is not allowed to follow the operation handle by the urging spring. Thereby, even if it tries to pull out the lock plate, it is blocked by the peripheral wall of the handle base and cannot be locked at the OFF position (for example, see Patent Document 3).

Japanese Patent No. 2946858 (page 3, left column, lines 29-35, FIG. 2) JP 2005-26106 A (page 5, line 32 to line 41, FIGS. 1 and 2) JP 2005-302537 A (page 5, line 38 to line 47, FIGS. 1 to 3)

  Thus, although OFF lock prevention at the time of welding by the external operation handle device is well known, the structure is dealt with according to the operation after considering the operation of the switch at the time of welding. It is a fact. That is, in the external operation handle device of Patent Document 2, the external operation handle device is mounted by mounting on a switch (this is referred to as a non-isolation circuit breaker) in which the tilting handle reaches a trip position when welding. In contrast, the external operation handle device disclosed in Patent Document 3 is a switch that locks the open / close mechanism and forcibly stops the tilting handle in the ON position during welding ( Even if this is combined with an isolation breaker here, it is intended to satisfy the isolation. As used herein, “satisfying isolation (or disconnection function)” means that, when the main contact of the switch is welded, the OFF lock by the external operation handle device is avoided. This is also specified in International Standard (IEC) 60947-1.

  Therefore, in order to satisfy the isolation, it is difficult to say that preparing an external operation handle device according to the characteristics of the switch is a good idea in view of the design / manufacturing of the device or standardization from the viewpoint of distribution inventory. . Further, as a further problem, whether it is Patent Document 2 or 3, it cannot be denied that the structure is complicated in order to satisfy the isolation. That is, the configurations disclosed in Patent Documents 2 and 3 lead to an increase in the size of the members (slide base and slider) that are engaged with the tilting handle, and these members move in the same manner as the tilting handle. Therefore, in order to convert it into a rotational motion in the rotary handle portion, it is necessary to use some conversion mechanism, and naturally this conversion mechanism must be provided in the external operation handle device ( Note that this movement is referred to as “rotational / linear motion” in contrast to the “rotational / rotational motion” referred to in Patent Document 1. In other words, the “rotation / linear motion” external operation handle device has the merit of being easy to cope with the isolation because of the “linear motion”, but it has the disadvantage that the device itself is complicated and the cost is increased accordingly. I had it.

  The present invention has been made to solve the above-described problems. Even in the case of an external operation handle device of “rotation / rotation motion”, the present invention satisfies the isolation and opens and closes in response to the isolation. It is intended to be obtained without depending on the characteristics of the vessel.

  An external operation handle device for a switch according to the present invention is manually operated from a front surface of the control panel, a first rotating member that engages with a tilting handle of the switch incorporated in a control panel and the like. A rotating handle portion protruding from the control panel and a second rotating member interlocking with the rotation of the rotating handle portion, the first and second rotating members responding to each other. And the center of rotation is different, and the first and second rotating members are not fitted in a normal opening / closing operation by the rotating handle portion, and The main contact is configured to be fitted only when a load in the OFF direction is applied to the rotary handle at the time of welding of the main contact.

  As described above, the present invention can provide a highly safe external operation handle device that is compatible with international standards while being a general-purpose product with reduced manufacturing costs.

Embodiment 1 FIG.
1 is an exploded perspective view of an external operation handle device (hereinafter referred to as a device) according to Embodiment 1 of the present invention, FIG. 2 is a side view of the device attached to a switch, and FIG. It is a figure which shows only a rotation type handle | steering-wheel part, (a) shows before pressing down of a locking plate, (b) shows after pressing down of a locking plate, respectively. 4 is a rear perspective view (that is, a view A in FIG. 1) showing only the cam and the handle in FIG. 1, and (a) is an ON state, and (b) is a main switch. The middle of turning to OFF at the time of welding of the contact is shown.

  FIG. 5 is a view showing the turning trajectory of the cam and the handle, and corresponds to the plan view of FIG. FIG. 6 is a graph showing the characteristics of the leaf spring.

  In FIG. 1, the apparatus 101 is roughly composed of the following parts. That is, the rotary handle portion 1 provided with an operation handle 11 for manually opening and closing the switch 102 (see FIG. 2) from the outside of the panel, and the spacer 12 of the rotary handle portion 1 can be rotated. A frame 2 having a bearing 2a that supports the shaft, a cam 3 that is fixed to the spacer 12 with a screw 6, and a hook-shaped protrusion 4a that engages with one end 7a of the hinel spring 7 that is inserted into the column 2b of the frame 2 are provided. Similarly, the handle plate 4 is pivotally attached to the support column 2 b, and the mounting plate 5 is fixed to the frame 2 by screws 8, and includes a mounting projection 5 a that fits into the mounting recess 2 c of the frame 2. The “first rotating member” and the “second rotating member” described in the claims are the handle hook 4 and the cam 3 described above, respectively.

  Subsequently, an assembly procedure of the apparatus 101 will be described. A locking plate 13 is inserted into a groove (not shown) of the operation handle 11 from the lower direction on the paper surface, and a screw spring 14 is engaged between the spring receiving projection 13a of the locking plate 13 and the spring receiving 12a of the spacer 12, and a screw. By fixing the operation handle 11 and the spacer 12 by 15, the rotary handle portion 1 is formed. In this state, since the locking plate 13 is urged upward by the pressing spring 14, the locking hole 11a is closed by the shutter portion 13b (see also FIG. 3A).

  Since the diameter of the spacer 12 is slightly smaller than the diameter of the bearing 2a, by loosely fitting the rotary handle portion 1 to the bearing 2a, coupled with the above-described upward biasing of the locking plate 13, The rotating handle 1 can be rotated in the clockwise and counterclockwise directions around the bearing 2a as the center of rotation, but when the rotating handle 1 is pivotally supported, the bottom surface of the spacer 12 (not shown). The concave portion 3 a of the cam 3 is fitted to the convex portion and fixed with a screw 6. Here, the cam 3 is provided with a collar portion 3b. As a result, the pivoting operation of the operation handle 11 causes the collar portion 3b to collide with the support column 2b, thereby limiting the rotation range. Become.

  After the hinge spring 7 is inserted into the column 2b, the handle hook 4 is pivotally mounted. At this time, one end 7a is engaged with the hook-shaped projection 4a, and the pin-shaped projection 3c of the cam 3 is inserted into the long hole 4b. Loosely fit in. The other end 7b is urged clockwise and engaged with a lock lever (not shown) inserted from the opening 2d of the frame 2. As a result, the handle hook 4 is urged counterclockwise on the paper surface, and the cam 3 that engages and moves through the long hole 4b, and thus the rotary handle portion 1, is similarly urged counterclockwise. FIG. 1 is an exploded perspective view in the biased state, that is, in the OFF position. The lock lever described above is one of the members constituting a well-known door lock function for preventing the door from being opened when the switch is in the ON position when the board is a door, for example. Since it is not the main part, the illustration and description thereof are omitted as described above.

  Finally, the device 101 is formed by fitting the mounting convex portion 5a and the mounting concave portion 2c and fixing them with screws 8. As shown in FIG. 2, in order to mount the device 101 on the switch 102, the tilting handle 102a of the switch 102 is temporarily turned counterclockwise to the OFF state, and the tilting handle 102a is attached to the tilting handle 102a. The engagement surface 5b of the attachment plate 5 may be brought into contact with the cover 102b while the opening 4c of the handle 4 is engaged, and the switch 102 and the switch 102 may be fastened to the panel, for example, with a mounting screw (not shown). The operation of the apparatus 101 from the OFF state to the ON state shown in FIG. 2 will be described with reference to FIG.

  In the OFF state, the operation handle 11 is pointed at the 9 o'clock position, for example, a clock hand, and is rotated clockwise from here to the ON state at the 12 o'clock position, that is, about 90 degrees of rotation. To do. When the operation handle 11 is at the 9 o'clock position, the pin-like protrusion 3c is located on the depth side on the paper surface of the long hole 4b, and the pin-like protrusion 3c is rotated in accordance with the clockwise rotation of the operation handle 11 described above. Once reaches the depth side of the long hole 4b, and heads to the front side from there. That is, the pin-like protrusion 3c appears to move left and right in the long hole 4b. This is because the rotation center of the cam 3 is the center point (screw 6) of the spacer 12, whereas The center of rotation 4 is different from the center of rotation of the column 2b. In response to the movement to the left and right, in other words, the pin-shaped protrusion 3c rotates in the clockwise direction, the pin-shaped protrusion 3c rotates the elongated hole 4b in the clockwise direction, whereby the ON-direction protrusion 4d of the opening 4c. 2 pushes the tilting handle 102a clockwise in FIG. 2, and the switch 102 goes over a known dead point (not described in detail) to shift to the ON state shown in FIG. As is clear from FIG. 2, the opening 4c has a backlash, as described above, because the handle wall 4 is urged in the OFF direction by the hinge spring 7 as described above. is there.

  Note that when the device 101 is mounted on the switch 102, the switch 102 is once turned OFF, but remains ON, and the device 101 is rotated to the ON position (as described above, the operation handle 11 is moved to the 12 o'clock position). And may be attached to the switch 102 in a state in which the switch 102 is rotated. Further, when the operation handle 11 is rotated counterclockwise from 12 o'clock to 9 o'clock from the ON state in FIG. 2, the OFF-direction protrusion 4e (see also FIG. 1) of the opening 4c is raised and lowered. The shape handle 102a is rotated counterclockwise, and further, the dead point is exceeded and the state is shifted to the OFF state.

  This restriction with ON or OFF, that is, a lock mechanism will be described with reference to FIG. As described above, the locking plate 13 is urged upward by the push spring 14, but as shown in (a), in the ON state, the portion corresponding to the lower portion on the paper surface of the hook-shaped lock portion 13 c is hollow ( This cavity is equivalent to the ON locking hole 2e (see also FIG. 1). Therefore, as shown in (b), the lock part 13c can enter the ON lock hole 2e, and the lock hole 11a is released from being closed by the shutter part 13b by the depression of the operation part 13d. By releasing the closure, the lock hole 11a is locked with the padlock 103, so that a so-called "ON lock" is possible.

  The “OFF lock” after the OFF operation described above is also substantially the same as the “ON lock” described above, but the OFF locking hole 2f is clockwise in the radial direction of the frame 2 as can be seen from FIG. A protrusion 2f1 is provided at the end portion. In other words, in the case of “OFF lock”, the “ON lock” is locked at the position of 12 o'clock, whereas it is further rotated counterclockwise from the 9 o'clock position by a slight amount of this protrusion 2f1. The reason for this will be described later. If the lock portion 13c is pushed down after the protrusion 2f1 is rotated, the operation handle 11 can be returned to the OFF position, that is, the 9 o'clock position. This is because, as described above, the lock portion 13c has a bowl shape. For example, when the padlock 103 is released, the lock hole 11a is closed immediately when the lock hole 11a is closed. Although the release of the closure continues, in order to close the locking hole 11a, it is necessary to rotate again by the protrusion 2f1 (this rotation corresponds to a reset operation to be described later). For self-recovery, the OFF lock is self-holding).

  Returning to FIG. 2 again, when the switch 102 is a circuit breaker, there is a trip mode due to overcurrent or short-circuit current interruption (for convenience, 102 is hereinafter referred to as a breaker). In this trip mode, the raising / lowering handle 102a is positioned approximately in the middle of ON and OFF, and the turning of the raising / lowering handle 102a is also rotated slightly counterclockwise by the rotation of the raising / lowering handle 102a. The “slight amount of rotation” urges counterclockwise rotation to reach a so-called “trip” position between ON and OFF of the operation handle 11. At this time, if it is in the “ON lock” state, it is needless to say that the operation handle 11 is stationary (restrained) at the ON position, but this constraint has some influence on the trip mode operation of the circuit breaker 102. As is well known, there is no.

  In order to return from the trip position to the ON position, the operation handle 11 is once rotated to the OFF position, and then driven further counterclockwise. A so-called enabling state (generally, this is called a reset operation) is performed, and thereafter, the above-described ON operation may be performed.

  Here, in addition to the event described in the background art (see paragraph 0005), for example, a pulsed current flows through the circuit breaker 102, and the main contact of the circuit breaker 102 is rarely welded. As described in paragraph 0008, if the circuit breaker 102 is a non-isolation type, the upright handle 102a indicates a trip position, and if it is an isolation type, it indicates an ON position. Thus, the operation handle 11 is also turned on or indicates a trip. From this state, the essence of the present invention will be described, in which the operation handle is turned to the OFF position without knowing the fact of welding, and is prevented from being “OFF-locked” at this OFF position. In the non-isolation type, that is, in the stationary state at the trip position, the difference from the rotation to the trip position by the normal trip mode cannot be distinguished, and is accompanied by the OFF lock in the first place. It must be said that it is insufficient to let the worker know the welding of the material. In this regard, in the isolation-compatible type, when the hand is released from the operation handle 11 after being rotated to the front of the OFF position without the OFF lock, the tilting handle 102a returns to the ON position, so that the operation handle 11 Will also return. Therefore, the operator can detect any abnormality of the circuit breaker 102 by this abnormal operation.

  In order to realize this “OFF lock prevention”, the long hole 4b and the pin-shaped protrusion 3c have been devised. That is, for example, as can be seen from FIG. 1, the long hole 4b of the handle wall 4 which is a resin molded product is obtained by dropping the long side on the counterclockwise direction side, that is, the side on which the load in the OFF direction is applied, The long hole 4b extends from the near side to the depth side on the paper surface, and widens starting from a slightly middle point on the left long side. A groove is provided substantially perpendicularly to the direction in which the load in the OFF direction is applied from this starting point, and a substantially L-shaped leaf spring 41 whose starting point is the bending point 41a is attached to the groove by means such as press fitting. To do. That is, as shown in FIG. 4A, from the bending point 41a to the tip 41b of the leaf spring 41, as described above, the long side of the long hole 4b in the clockwise direction is equivalent to the drop of the flesh of the long hole 4b. It functions as a long side on the counterclockwise side (reference to FIG. 1) substantially parallel to (reference to FIG. 1).

  Therefore, in the transition from ON to OFF, the bending point 41a to the tip 41b serve as a part of the long hole 4b to support the movement of the pin-like protrusion 3c to the left and right within the long hole 4b. Become. Here, in the OFF operation and the reset operation, the leaf spring 41 is naturally bent, but the load and the bending allowance are lighter than the isolation load and the bending allowance described later, as shown in FIG. It can be seen that there is little change because of the load.

  On the other hand, for example, the pin-like protrusion 3c of the cam 3 which is a resin molded product is formed with a concave portion 3c1 by dropping the flesh on the side where the load in the OFF direction is applied to the head (corresponding to the lower part in FIG. 1). Keep it. Here, as described above, the rotation centers of the cam 3 and the handle hook 4 are different from each other. However, for the so-called “rotation / rotation motion” of the present invention, as shown in FIG. 5, the arrangement position of the column 2 b is set so as to intersect at a point where there are two rotation trajectories. Further, at this “certain point”, the flesh corresponding to the concave portion 3c1 described above is formed as a convex portion 4f on the long side of the long hole 4b in the counterclockwise direction (reference to FIG. 1). The tip 41b of the leaf spring 41 is a narrow portion 41b1 so as not to interfere with the convex portion 4f. Note that the concave portion 3c1, the convex portion 4f, and the narrow portion 41b1 described so far are not involved at all in normal ON, OFF, and reset operations.

  The concave portion 3c1, the convex portion 4f, and the narrow portion 41b1 function at the time of OFF operation by the device 101 at the time of welding the main contact of the circuit breaker 102. That is, when the circuit breaker 102 in the welded state is turned off without knowing the welding, a considerable load is not applied before the normal OFF position, regardless of whether or not the circuit breaker is compatible with isolation. The tilting handle 102a does not reach the OFF position. However, the apparatus 101 of the present invention uses this property to set the spring load of the leaf spring 41 so that the leaf spring 41 bends below the load to reach the OFF position, and the leaf spring 41 bends. In this case, the concave portion 3c1 and the convex portion 4f were immediately fitted (see FIG. 4B). As is apparent from the above description, this fitting has a certain point where two rotation trajectories intersect as a starting point of bending of the leaf spring 41 and hinders the fitting itself. This is nothing but the narrow portion 41b1.

  By fitting two members having different rotation trajectories, the force acts in the direction in which the two members are coupled to each other, so that further rotation of the operation handle 11 is prevented. Therefore, when the main contact is welded, the operation handle 11 cannot be rotated to the reset position, so that the OFF lock is inevitably prevented. Consisted of). Since the OFF position of the operation handle 11 and the fitting point of the two members are close to each other due to variations in the opening / closing mechanism of the circuit breaker 102, the OFF lock is set not at the OFF position but at the reset position. Yes. This is the reason why the protrusion 2f1 is provided in the OFF locking hole 2f described above.

  As described above, the present invention is a so-called well-known member in which the two turning loci of the cam 3 and the handle hook 4 are different from each other in order to transmit the mutual movements of the raising and lowering handle 102 a and the rotating handle portion 1. In particular, focusing on the handle hook 4 and a simple device for engaging with the center of rotation and the cam 3 (the aforementioned concave portion 3c1, convex portion 4f, and The disconnect function was satisfied only by setting the narrow portion 41b1. In general, welding is said to be a rare event, but in combination with the apparatus 101, it is assumed that the probability of occurrence further decreases. It is difficult to say that it is a good idea from the viewpoint of cost reduction of the apparatus to adopt the complicated configuration of “rotation / linear motion” and satisfy the disconnection function only for the low probability. In this respect, the device 101 according to the present invention realizes the disconnect function without affecting the normal ON / OFF operation only by adding the leaf spring 41 by the “rotation / rotation motion” as described above. Therefore, the cost reduction of the apparatus 101 can be greatly expected.

  Further, as a secondary effect more than cost reduction, the disconnect function by the device 101 is not dependent on the characteristics of the combined switch or circuit breaker. As apparent from the above description, the OFF lock position is set slightly counterclockwise (reference to FIG. 1) from the OFF position (that is, the reset position) in consideration of variations in the switching mechanism of the switch or circuit breaker. However, the mechanism that does not allow the OFF lock position to be reached at the time of welding is obtained by the inability to operate the operation handle 11 by fitting in the apparatus 101 immediately after the heavy load is generated by the tilting handle 102a. That is, in operating this mechanism, the trigger is only on the circuit breaker side (the heavy load generated by the above-described tilting handle 102a), but a series of subsequent operations are completed in the apparatus 101. As a result, the circuit breaker depends on the circuit breaker, that is, it is not linked to the operation due to the heavy load of the raising / lowering handle 102a caused by welding. The disconnect function by the device 101 can be provided to the user without questioning whether or not. In particular, whether or not this isolation is supported is not limited to the standardization of the device. Of course, even if the isolation is not considered on the user side, only the device 101 is attached, Since the OFF lock prevention is implemented as if it were a standard function, the positive impact on ensuring the safety of the inspection work on the load side is immeasurable.

  Furthermore, since the operation due to the heavy load of the raising / lowering handle 102a due to welding is not interlocked, it is possible to set the fitting point before the OFF position. Accordingly, it is not necessary to extremely separate the OFF position and the reset position, and the user can operate the reset operation after the trip or the OFF lock operation without a sense of incongruity, so that the operability can be improved.

  Although the characteristics of the leaf spring 41 are shown in FIG. 6 as described above, it is important in the present invention to set the fitting point lower than the bending allowance due to the isolation load, as can be seen from this graph. It is an important point. That is, this also realizes the above-described “deflecting the leaf spring 41 under a load that is about to reach the OFF position”. Regarding the isolation function, the above-mentioned IEC 60947-1 determines that “the actuator is not restrained at the OFF position even when an operation force three times the OFF load is applied”. Therefore, based on this standard, the device 101 according to the present invention allows the leaf spring 41 to have a bending allowance with an isolation load of three times or more of the OFF load, and as described above, the fitting point is lower than this bending allowance. Since it is set, it also satisfies the IEC isolation function. Therefore, it is possible to provide the user with a safer, cheaper and more versatile device (external operation handle).

It is a disassembled perspective view of the apparatus in Embodiment 1 of this invention. It is a side view of the state which attached the apparatus of FIG. 1 to the switch. It is a figure which shows only a rotation type handle part in FIG. It is a back surface perspective view which shows only a cam and a handle pocket in FIG. It is a figure which shows the rotation locus | trajectory in FIG. It is a graph which shows the characteristic of the leaf | plate spring of the apparatus of FIG.

Explanation of symbols

1 rotating handle part, 3 cam, 3c pin-like protrusion, 3c1 recess,
4 Handle Uke, 4b Long Hole, 4c Opening, 4f Convex, 41 Leaf Spring,
41a bending point, 41b tip, 41b1 narrow portion, 101 external operation handle device,
102 Switch (breaker), 102a Upside down handle.

Claims (6)

A first rotating member that is configured to open and close a switch incorporated in the control panel by manual operation from the front surface of the control panel, and the like, and that engages with a tilting handle of the switch; A rotating handle portion projecting from the control panel, and a second rotating member interlocking with the rotation of the rotating handle portion, wherein the first and second rotating members are responsive to each other. In the external operation handle device of the switch that is configured to match the center of rotation,
The first and second rotating members are not fitted in a normal opening / closing operation by the rotating handle portion, and are turned in the OFF direction at the rotating handle portion when the main contact of the switch is welded. An external operation handle device for a switch, which is configured to be fitted only when a load is applied. When the pin-shaped protrusion provided on the second rotating member engages and moves in the long hole provided on the first rotating member, the second rotating member is interlocked with the rotation of the rotating handle portion. The external operation handle device for a switch according to claim 1, wherein: By removing a part of the side of the long hole to which the load is applied in the OFF direction and attaching a substantially L-shaped leaf spring to the side, the bending spring to the tip of the leaf spring is used as the side. The external operation handle device for a switch according to claim 2, wherein the external operation handle device is operated. The first and second rotating members can be fitted by providing a concave portion on the side to which the load in the OFF direction of the pin-shaped projection is applied and a convex portion that fits the concave portion on the side portion of the long hole. The external operation handle device according to claim 3. 5. The external operation handle device according to claim 4, wherein when the concave portion and the convex portion are fitted, a part from the bending point to the tip of the leaf spring is omitted so that the leaf spring does not intervene. The external spring according to any one of claims 3 to 5, wherein the leaf spring bends when the main contact of the switch is welded by more than three times the load in the OFF direction at the rotary handle portion. Operation handle device.

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