EP2393092A1 - A switching device - Google Patents
A switching device Download PDFInfo
- Publication number
- EP2393092A1 EP2393092A1 EP11354029A EP11354029A EP2393092A1 EP 2393092 A1 EP2393092 A1 EP 2393092A1 EP 11354029 A EP11354029 A EP 11354029A EP 11354029 A EP11354029 A EP 11354029A EP 2393092 A1 EP2393092 A1 EP 2393092A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- recess
- adjustable member
- switching device
- shaft
- protraction
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/28—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member
- H01H9/281—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock
- H01H9/282—Interlocking, locking, or latching mechanisms for locking switch parts by a key or equivalent removable member making use of a padlock and a separate part mounted or mountable on the switch assembly and movable between an unlocking position and a locking position where it can be secured by the padlock
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
- H01H11/0006—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches
- H01H2011/0043—Apparatus or processes specially adapted for the manufacture of electric switches for converting electric switches for modifying the number or type of operating positions, e.g. momentary and stable
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/08—Turn knobs
Definitions
- the present invention broadly relates to a switching device, and particularly relates to a switching device used for motor controls and the like.
- a switch to operate an electrical device such as motor control, circuit breaker or the like is typically often mounted outside a chassis encasing the electrical device to operate the device. Some form of locking is necessary in order to prevent accidental or unauthorized operation of the switch and /or accidental or unauthorized opening of a door of the chassis.
- the present invention is a switching device operable between different set-points comprising a rotary control handle adapted to switch between set-points, a sliding element adapted for protraction from a resting position to an elevated position to lock the control handle at any set-point and retraction from the elevated position to the resting position to unlock the control handle, a locking member comprising a shaft and a recess, said shaft is movable in response to the protraction and retraction of the sliding element and respectively into and out the recess so as to correspondingly lock and unlock the control handle, and means for selectively disabling the protraction of the sliding element at a designated set-point in a normal course of operation and selectively enabling the protraction when required.
- the means may be an adjustable member for selectively preventing entry of the shaft into the recess and selectively allowing entry of the shaft into the recess.
- the adjustable member may be insertable into the recess to block the entry of the recess and removable to unblock the entry.
- the adjustable member may include a cylindrical rod or a tubular rod.
- the adjustable member may also be slidable into a first position to block the entry of the recess and a second position that unblocks the entry. Yet, the adjustable member may be rotatable into a first position to block the entry of the recess and a second position that unblocks the entry.
- the adjustable member may further comprise a retractable protruding member adapted for releasably securing within the recess.
- the recess may further comprise a retractable protruding member and the adjustable member may further comprise a latching recess adapted for receiving the retractable protruding member.
- the shaft of the switching device may comprise an aperture adapted for selectively wedging and unwedging the shaft.
- the present invention is also a switching device operable between different set-points comprising a rotary control handle adapted to switch between set-points, a sliding element adapted for protraction from a resting position to an elevated position to lock the control handle at any set-point and retraction from the elevated position to the resting position to unlock the control handle, a locking member comprising a shaft and a recess, said shaft is movable in response to the protraction and retraction of the sliding element and respectively into and out the recess so as to correspondingly lock and unlock the control handle, and a channel in communication with the recess or the shaft in which an external adjustable member is insertable to disable the protraction of the sliding element at a designated set-point in a normal course of operation.
- the switching device may further comprise a storage recess adapted for receiving the adjustable member.
- An embodiment of the invention is a switching device with a locking feature and a reversible operation of a padlocking feature at a designated set-point, wherein the switching device is preferably a rotary switch.
- FIG. 1 shows a switching device 100 comprising a rotary control handle 102, a sliding element 104 and a housing 106.
- This switching device 100 may be mounted on the external surface of a chassis of an electric device such as a motor control or a circuit breaker (not shown in the drawings) and adapted to connect to the electric device.
- the rotary control handle 102 is rotatable between a first set-point (as shown in Figure 1 ) and a second set-point, wherein the handle is orientated at 90° clockwise with respect to that shown in Figure 1 .
- the first and second set-points correspond to an "ON" position and an "OFF" position of the switching device 100.
- Figure 1 shows the control handle 102 positioned to a designated set-point of the "ON" position.
- the cross-sectional perspective view of the switching device 100 with the control handle 102 positioned to the designated "ON" position shows an arrangement of the sliding element 104 coupled to an actuator 200 which is in turn coupled to a shaft 202.
- the shaft 202 Upon pushing the sliding element 104 in a downward direction as indicated by a directional arrow 20, the shaft 202 is retracted out of a recess 204 via the actuation of the actuator 200.
- the recess 204 is formed in the housing 106.
- the present invention of a switching device allows a user to have a choice to hinder or disallow the ability to lock a sliding element of the switching device with a padlock by disabling the protraction of a shaft, which is in communication with sliding element, into a recess.
- the user can also choose to allow this ability to lock a sliding element of the switching device with a padlock again using the same switching device by enabling the protraction of the shaft into the recess.
- the disabling-enabling of the protraction of the shaft depends on the user's requirements and is reversible, that is to say, the user can toggle between disabling and enabling, and vice versa.
- Such a switching device provides a convenient, user-selectable and reversible way of choosing the function of padlocking at a designated set-point, more specifically at the "ON" position.
- Figures 4a-4d show an embodiment of the invention to reversibly disable and enable the protraction of the shaft 202 (not shown in Figure 4a ).
- the bottom view of the embodiment shows the housing 106 comprising the recess 204, which runs through to the back of the housing 106.
- a means to disable the protraction of the shaft 202 which includes an adjustable member 400 is insertable into and removable from the recess 204 (not shown in Figure 4b ), accessing from the back of the housing 106.
- An embodiment of the adjustable member 400 is preferably a cylindrical rod as shown in Figure 4d .
- the adjustable member 400 of the cylindrical rod comprises a body 402 with a ring 404 positioned axially along the body 402 and a head 406 which is located at one end of the body 402.
- the head 406 and the ring 404 each has a circumference larger than the circumference of the body 402.
- the body 402 is insertable into the recess 204 (not shown in Figure 4c ). Upon full insertion, the body 402 comes into contact with the shaft 202; thereby blocking the shaft 202 and disabling the protraction of the shaft 202.
- the ring 404 is used to wedge the adjustable member 400 against the housing 106.
- the head 406 facilitates easy insertion and extraction of the adjustable member 400 into and out the recess 204 (not shown in Figure 4c ).
- the body 402 of the adjustable member 400 has an overall height that is comparable the total length of the recess 204. Upon full insertion into the recess 204, the head 406 of the adjustable member 400 is flushed with the back surface of the housing 106.
- the recess 204 may also be in communication with a channel or may form part of a channel (not shown).
- the channel allows the adjustable member 400 to be inserted to disable the protraction of the sliding element 104 at the designated set-point in a normal course of operation.
- the adjustable member 400 may be an external adjustable member.
- adjustable member 400 may preferably be a tubular rod (not shown in the drawings).
- Figures 5a-5e show another embodiment of the invention to reversibly disable and enable the protraction of the shaft 202 (not shown in Figure 5a ).
- the bottom view of the embodiment shows the housing 106 comprising a means to disable and enable the protraction of the shaft 202 (not shown in Figure 5a ) which is an adjustable member 500.
- An embodiment of the adjustable member 500 is a U-shaped element as shown in Figure 5b .
- the adjustable member 500 of the U-shaped element comprises a top blocking plate 504 and a bottom blocking plate 506.
- a plate recess 502 is disposed on the bottom blocking plate 506.
- the adjustable member 500 is slidable in an outward direction as indicated by a directional arrow 50 to a first position where the top blocking plate 504 is not placed along the path of the shaft 202 and the recess 204.
- the protraction of the shaft 202 is enabled with the lifting of the sliding element 104; thereby allowing padlocking of the switching device 100 (not shown in Figure 5c ).
- the adjustable member 500 is slidable in an inward direction as indicated by a directional arrow 52 to a second position where the top blocking plate 504 is placed along the path of the shaft 202 and the recess 204.
- the protraction of the shaft 202 is disabled as the top blocking plate 504 is in contact with the shaft 202 and therefore blocks the shaft 202 from entering into the recess 204; thereby disallowing the sliding element 104 to be lifted and correspondingly hindering the padlocking of the switching device 100 (not shown in Figure 5e ).
- the plate recess 502 is to facilitate easy handling of the adjustable member 500, more specifically, to allow the user to slide the adjustable member 500 without much difficulty, for example by using a flat screw driver to push on the plate recess 502.
- the plate recess 502 may also be used to wedge against the housing 106.
- another embodiment of the present invention may comprise a rotatable adjustable member having a top blocking plate.
- the adjustable member may be rotatable axially to bring its top blocking plate into a first position to block the entry of the recess and a second position that unblocks the entry.
- Figures 6a-6f show yet another embodiment of the invention to reversibly disable and enable the protraction of the shaft 202 (not shown in Figure 6a ).
- the bottom view of the embodiment shows the housing 106 comprising a recess 204, and a storage 602 which includes a storage recess 604.
- the housing 106 further accommodates a means to disable and enable the protraction of the shaft 202 (not shown in Figure 6a ) which is an adjustable member 600.
- Figure 6b shows the adjustable member 600 disposed within the storage recess 604 in a stored-away configuration.
- the adjustable member 600 being relatively small in size and removable from the switching device 100 may be easily misplaced during use.
- the adjustable member 600 may be stored safely within the switching device 100 for future use. This would advantageously reduce the risk of losing the adjustable member 600.
- the adjustable member 600 comprises a body 606, a head 608 at one end of body 606 and a plurality of protruding members 610.
- the head 608 have a circumference larger than the circumference of the body 606 to facilitate easy insertion and extraction of the adjustable member 600 into and out the recess 204 (not shown in Figure 6c ).
- the protruding members 610 (not shown in Figure 6b ) allow the adjustable member 600 to be wedged to the housing 106 in the storage recess 604 (not shown in Figure 6b ).
- the protruding members 610 are spring-biased or are made of a resilient material.
- Figure 6d illustrates that in the stored-away configuration, upon lifting the sliding element 104, the shaft 202 is protracted into the recess 204 (not shown in Figure 6d ) as indicated by a directional arrow 60.
- Figures 6e and 6f show the adjustable member 600 disposed within the recess 204 (not shown in Figures 6e and 6f ).
- the body 606 is insertable into the recess 204.
- the body 606 (not shown in Figures 6e and 6f ) of the adjustable member 600 comes into contact with the shaft 202; thereby blocking the shaft 202 and disabling the protraction of the shaft 202 in a direction as indicated by a directional arrow 62 when attempting to lift the sliding element 104.
- the protruding members 610 (not shown in Figures 6e and 6f ) allow the adjustable member 600 to be wedged within the recess 204.
- Figures 7a-7f show another embodiment of the invention to reversibly disable and enable the protraction of the shaft 202 (not shown in Figure 7a ).
- the bottom view of the embodiment shows the housing 106 comprising a storage 702 which includes a storage recess 704.
- the housing 106 further accommodates a means to disable and enable the protraction of the shaft 202 (not shown in Figure 6a ), the means being an adjustable member 700.
- the adjustable member 700 is disposed within the recess 204 (not shown in Figure 7a ) in a first position and rotatable along a direction as indicated by a directional arrow 70.
- Figure 7b shows the adjustable member 700 being rotated to a second position.
- the adjustable member 700 may be removed from the recess 204 and disposed within the storage recess 704 in a stored-away configuration (not shown).
- the adjustable member 700 comprises a body 706, a head 708 at one end of body 706 and a retractable protruding element 710.
- the head 708 have a circumference larger than the circumference of the body 706 to facilitate easy insertion and extraction of the adjustable member 700 into and out the recess 204 (not shown in Figure 7c ).
- the head 708 further comprises a slit 712 which allows the insertion of an external tool (not shown) such as a flat-head screwdriver to facilitate easy rotational action to the adjustable member 700.
- the adjustable member 700 is inserted into the recess 204 in the orientation as shown in Figure 7a .
- Figure 7d shows the cross-sectional side view of the inserted adjustable member 700.
- the adjustable member 700 is then rotated to the orientation as shown in Figure 7b .
- Figure 7e shows the cross-sectional side view of the rotated adjustable member 700 wherein the retractable protruding element 710 is positioned aligned with a latching edge 714 of the housing 106 (not shown in Figure 7e ).
- Such an arrangement of the latching edge 714 and the retractable protruding element 710 prevents the adjustable member 700 from accidental dropping off during delivery of the switching device 100 or when a person handling the switching device 100 starts pulling the sliding element 104 before installing the switching device 100 onto a door of the chassis encasing an electrical device (not shown in Figure 7 ).
- the switching device is usually delivered with the adjustable member 700 inserted into the recess 204; thereby disabling the protraction of the shaft 202 and preventing entry into the recess 204.
- a user may choose to disable the protraction of the shaft 202 (not shown) as illustrated in Figure 7b or enable the protraction of the shaft 202 (not shown) by performing the steps as illustrated in Figure 7f .
- the adjustable member 700 is rotated in a direction as indicated by a directional arrow 72 to an orientation as shown in Figure 7f(ii) . At this orientation, the adjustable member 700 is removable from the recess 204 (not shown) and placeable into the storage recess 704 as seen in Figure 7f(iii) .
- the adjustable member 700 By rotating the adjustable member 700 in a direction as indicated by a directional arrow 74, the adjustable member 700 is secured within the storage recess 704 as seen in Figure 7f(iv) , whereby the retractable protruding element 710 (not shown in figure 7f ) is latched within the storage recess 704.
- the switching device 100 is now in the stored-away configuration, wherein the protraction of the shaft 202 is enabled with the lifting of the sliding element 104 (not shown).
- the arrangement of the latching edge 714 and the retractable protruding element 710 to prevent the adjustable member 700 from accidental dropping off or unintentional removal as described in Figure 7 may be realized in another embodiment (not shown in the drawings), wherein a latching edge or latching recess may be located on an adjustable member while a retractable protruding element may be located on a recess receiving the adjustable member instead.
- the adjustable member may be releasably securable within the recess by performing similar steps as described in Figure 7f .
- Figures 8a-8b show yet another embodiment of the invention to reversibly disable and enable the protraction of the shaft 202.
- the shaft 202 comprises two apertures 804, 806.
- Adjustable members such as wedging pins 800, 802 encased within the switching device 100 (not shown in Figures 8a and 8b ) are inserted into the corresponding apertures 804, 806 in directions as indicated by respective directional arrows 80, 82.
- the shaft 202 is prevented from entry into the recess 204; thereby hindering the lifting of the sliding element 104 (not shown in Figures 8a and 8b ).
- Figures 9a-9b show another embodiment of the invention to reversibly disable and enable the protraction of the shaft 202, based on the similar working principle of the embodiment of Figures 8a-8b .
- the shaft 202 comprises a through-hole aperture 902.
- An adjustable member such as a wedging pin 900 is inserted through the through-hole aperture 902 in a direction as indicated by a directional arrow 90.
- the wedging pin 900 prevents the shaft 202 from entry into the recess 204.
- Figure 9b shows the wedging pin 900 removed from the through-hole aperture 902 in a direction as indicated by a directional arrow 92. In this case, the shaft is now allowed to enter the recess 204 upon lifting the sliding element 104 (not shown).
- the embodiments described in Figures 8 and 9 may further comprise a channel in communication with the shaft 202.
- the aperture may form part of the channel.
- the channel allows the adjustable member to be inserted to disable the protraction of the sliding element 104 at the designated set-point in a normal course of operation.
- the adjustable member may be an external adjustable member.
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- Mechanical Control Devices (AREA)
- Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
- Switches With Compound Operations (AREA)
- Switch Cases, Indication, And Locking (AREA)
Abstract
A switching device operable between different set-points comprising a rotary control handle adapted to switch between set-points, a sliding element adapted for protraction from a resting position to an elevated position to lock the control handle at any set-point and retraction from the elevated position to the resting position to unlock the control handle, a locking member comprising a shaft and a recess, said shaft is movable in response to the protraction and retraction of the sliding element and respectively into and out the recess so as to correspondingly lock and unlock the control handle, and means for selectively disabling the protraction of the sliding element at a designated set-point in a normal course of operation and selectively enabling the protraction when required.
Description
- The present invention broadly relates to a switching device, and particularly relates to a switching device used for motor controls and the like.
- A switch to operate an electrical device such as motor control, circuit breaker or the like is typically often mounted outside a chassis encasing the electrical device to operate the device. Some form of locking is necessary in order to prevent accidental or unauthorized operation of the switch and /or accidental or unauthorized opening of a door of the chassis.
- In a prior art, Singapore Patent Application No.
200906594-7 - For such switches similar to the one disclosed in Singapore Patent Application No.
200906594-7 - Currently, a deformable or breakable piece is incorporated into the design of such a switch available in the market. The user would deform or break the piece to enable padlocking at the "ON" position. However this process is irreversible. That is to say, the padlocking at the "ON" position cannot be disabled thereafter.
- Generally, the use of a deformable or breakable piece leads to an irreversible process for disabling the padlocking function. As such, a user does not have a choice as he or she desires to manipulate the padlocking function at a designated set-point depending on the requirements of operation. This often causes inconvenience and undeniably sets limitations to a user with respect to the padlocking function; thereby lacking user-friendliness.
- Therefore, there is a need for an improved switching device to address any one of the problems mentioned above.
- The present invention is a switching device operable between different set-points comprising a rotary control handle adapted to switch between set-points, a sliding element adapted for protraction from a resting position to an elevated position to lock the control handle at any set-point and retraction from the elevated position to the resting position to unlock the control handle, a locking member comprising a shaft and a recess, said shaft is movable in response to the protraction and retraction of the sliding element and respectively into and out the recess so as to correspondingly lock and unlock the control handle, and means for selectively disabling the protraction of the sliding element at a designated set-point in a normal course of operation and selectively enabling the protraction when required.
- In the switching device, the means may be an adjustable member for selectively preventing entry of the shaft into the recess and selectively allowing entry of the shaft into the recess. The adjustable member may be insertable into the recess to block the entry of the recess and removable to unblock the entry. The adjustable member may include a cylindrical rod or a tubular rod.
- In the switching device, the adjustable member may also be slidable into a first position to block the entry of the recess and a second position that unblocks the entry. Yet, the adjustable member may be rotatable into a first position to block the entry of the recess and a second position that unblocks the entry.
- The adjustable member may further comprise a retractable protruding member adapted for releasably securing within the recess. Alternatively, the recess may further comprise a retractable protruding member and the adjustable member may further comprise a latching recess adapted for receiving the retractable protruding member.
- The shaft of the switching device may comprise an aperture adapted for selectively wedging and unwedging the shaft.
- The present invention is also a switching device operable between different set-points comprising a rotary control handle adapted to switch between set-points, a sliding element adapted for protraction from a resting position to an elevated position to lock the control handle at any set-point and retraction from the elevated position to the resting position to unlock the control handle, a locking member comprising a shaft and a recess, said shaft is movable in response to the protraction and retraction of the sliding element and respectively into and out the recess so as to correspondingly lock and unlock the control handle, and a channel in communication with the recess or the shaft in which an external adjustable member is insertable to disable the protraction of the sliding element at a designated set-point in a normal course of operation.
- The switching device may further comprise a storage recess adapted for receiving the adjustable member.
- Embodiments of the invention will be better understood and readily apparent to one of ordinary skill in the art from the following written description, by way of example only, with reference to the accompanying drawings, in which:
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Figure 1 shows a plan view of an embodiment of the invention. -
Figure 2 shows a cross-sectional perspective view of the embodiment as seen from line A-A' ofFigure 1 with a sliding element (a) retracted; and (b) extended. -
Figure 3a shows a cross-sectional perspective view of the embodiment as seen from line A-A' ofFigure 1 with the sliding element extended and a padlock (in ghost). -
Figure 3b shows a plan view of the embodiment as seen from line D-D' ofFigure 3a with the padlock (in ghost). -
Figure 4 shows a bottom perspective view of an embodiment as seen from line C-C' ofFigure 2b : (a) without an adjustable member; and (b) with an adjustable member. -
Figure 4c shows a cross-sectional perspective view of the embodiment as seen from line E-E' ofFigure 4b with the adjustable member. -
Figure 4d shows a perspective view of an embodiment of the adjustable member inFigure 4b . -
Figure 5a shows a bottom perspective view of another embodiment of the invention as seen from line C-C' ofFigure 2b with an adjustable member at a first position. -
Figure 5b shows a perspective view of an embodiment of the adjustable member inFigure 5a . -
Figure 5c shows an expanded cross-sectional perspective view of the embodiment of the invention as seen from line F-F' of anencircled area 51 inFigure 5a . -
Figure 5d shows a bottom perspective view of the embodiment of the invention as seen from line C-C' ofFigure 2b with the adjustable member at a second position. -
Figure 5e shows an expanded cross-sectional perspective view of the embodiment of the invention as seen from line G-G' of anencircled area 53 inFigure 5d . -
Figure 6 shows a bottom perspective view of yet another embodiment of the invention as seen from line C-C' ofFigure 2b (orientated 90° clockwise) with an adjustable member (a) removable from the embodiment; and (b) at a first position. -
Figure 6c shows a perspective view of an embodiment of the adjustable member inFigure 6a or 6b . -
Figure 6d shows an expanded cross-sectional view of the embodiment of the invention as seen from line H-H' of anencircled area 61 inFigure 6b . -
Figure 6e shows a bottom perspective view of the embodiment of the invention as seen from line C-C' ofFigure 2b (orientated 90° clockwise) with the adjustable member.at a second position. -
Figure 6f shows an expanded cross-sectional view of the embodiment of the invention as seen from line I-I' of anencircled area 63 inFigure 6e . -
Figure 7 shows a bottom view of yet another embodiment of the invention as seen from line C-C' ofFigure 2b (orientated 90° clockwise) with an adjustable member rotated (a) to a first position; and (b) to a second position. -
Figure 7c shows a perspective view of an embodiment of the adjustable member inFigure 7a or7b . -
Figure 7d shows an expanded cross-sectional side view of the embodiment of the invention as seen from line J-J' of anencircled area 71 inFigure 7a . -
Figure 7e shows an expanded cross-sectional side view of the embodiment of the invention as seen from line K-K' of anencircled area 73 inFigure 7b . -
Figure 7f shows a flow diagram containing the bottom view of the embodiment of the invention as seen from line C-C' ofFigure 2b (orientated 90° clockwise) with the adjustable member (i) rotated to the second position at a first location; (ii) rotated to the first position at the first location; (iii) rotated to the first position at a second location; and (iv) rotated to the second position at the second location. -
Figure 8 shows an expanded cross-sectional side view of yet another embodiment of the invention as seen from line B-B' of anencircled area 11 inFigure 1 with a shaft (a) wedged; and (b) unwedged. -
Figure 9 shows an expanded cross-sectional side view of yet another embodiment of the invention as seen from line B-B' of anencircled area 11 inFigure 1 with a shaft (a) wedged; and (b) unwedged. - An embodiment of the invention is a switching device with a locking feature and a reversible operation of a padlocking feature at a designated set-point, wherein the switching device is preferably a rotary switch. With reference to the drawings,
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Figure 1 shows aswitching device 100 comprising arotary control handle 102, asliding element 104 and ahousing 106. Thisswitching device 100 may be mounted on the external surface of a chassis of an electric device such as a motor control or a circuit breaker (not shown in the drawings) and adapted to connect to the electric device. - In the preferred embodiment, the
rotary control handle 102 is rotatable between a first set-point (as shown inFigure 1 ) and a second set-point, wherein the handle is orientated at 90° clockwise with respect to that shown inFigure 1 . The first and second set-points correspond to an "ON" position and an "OFF" position of theswitching device 100. In this embodiment,Figure 1 shows thecontrol handle 102 positioned to a designated set-point of the "ON" position. - In a preferred embodiment of
Figure 2a , the cross-sectional perspective view of theswitching device 100 with thecontrol handle 102 positioned to the designated "ON" position shows an arrangement of thesliding element 104 coupled to anactuator 200 which is in turn coupled to ashaft 202. Upon pushing thesliding element 104 in a downward direction as indicated by adirectional arrow 20, theshaft 202 is retracted out of arecess 204 via the actuation of theactuator 200. In this embodiment, therecess 204 is formed in thehousing 106. - When the sliding
element 104 is lifted in an upward direction as indicated by adirectional arrow 22, theshaft 202 is protracted into therecess 204 as seen inFigure 2b . In this configuration, the control handle 102 is locked at the designation "ON" position; thereby disabling switching to a different set-point. A padlock 300 (as shown in ghost inFigure 3a ) may be used to maintain the protraction of theshaft 202 into therecess 204 and correspondingly keep the control handle 102 in the locked position.Figure 3b shows a top view of theswitching device 100 with the slidingelement 104 locked by the padlock 300 (in ghost). - The present invention of a switching device allows a user to have a choice to hinder or disallow the ability to lock a sliding element of the switching device with a padlock by disabling the protraction of a shaft, which is in communication with sliding element, into a recess. The user can also choose to allow this ability to lock a sliding element of the switching device with a padlock again using the same switching device by enabling the protraction of the shaft into the recess. The disabling-enabling of the protraction of the shaft depends on the user's requirements and is reversible, that is to say, the user can toggle between disabling and enabling, and vice versa. Such a switching device provides a convenient, user-selectable and reversible way of choosing the function of padlocking at a designated set-point, more specifically at the "ON" position.
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Figures 4a-4d show an embodiment of the invention to reversibly disable and enable the protraction of the shaft 202 (not shown inFigure 4a ). InFigure 4a , the bottom view of the embodiment shows thehousing 106 comprising therecess 204, which runs through to the back of thehousing 106. InFigure 4b , a means to disable the protraction of the shaft 202 (not shown inFigure 4b ) which includes anadjustable member 400 is insertable into and removable from the recess 204 (not shown inFigure 4b ), accessing from the back of thehousing 106. - As illustrated in
Figure 4c , with theadjustable member 400 inserted into the recess 204 (not shown inFigure 4c ), theshaft 202 is blocked from entering into therecess 204 by theadjustable member 400. This, in turn, prevents the slidingelement 104 from being lifted in an upward direction as indicated by adirectional arrow 40. Failure to lift the slidingelement 104 away from the control handle 102 would result in having insufficient space to accommodate the padlock 300 (not shown inFigure 4c ). - An embodiment of the
adjustable member 400 is preferably a cylindrical rod as shown inFigure 4d . Theadjustable member 400 of the cylindrical rod comprises abody 402 with aring 404 positioned axially along thebody 402 and a head 406 which is located at one end of thebody 402. The head 406 and thering 404, each has a circumference larger than the circumference of thebody 402. Together with reference toFigure 4c , thebody 402 is insertable into the recess 204 (not shown inFigure 4c ). Upon full insertion, thebody 402 comes into contact with theshaft 202; thereby blocking theshaft 202 and disabling the protraction of theshaft 202. - The
ring 404 is used to wedge theadjustable member 400 against thehousing 106. The head 406 facilitates easy insertion and extraction of theadjustable member 400 into and out the recess 204 (not shown inFigure 4c ). Thebody 402 of theadjustable member 400 has an overall height that is comparable the total length of therecess 204. Upon full insertion into therecess 204, the head 406 of theadjustable member 400 is flushed with the back surface of thehousing 106. - The
recess 204 may also be in communication with a channel or may form part of a channel (not shown). The channel allows theadjustable member 400 to be inserted to disable the protraction of the slidingelement 104 at the designated set-point in a normal course of operation. Theadjustable member 400 may be an external adjustable member. - Another embodiment of the
adjustable member 400 may preferably be a tubular rod (not shown in the drawings). -
Figures 5a-5e show another embodiment of the invention to reversibly disable and enable the protraction of the shaft 202 (not shown inFigure 5a ). InFigure 5a , the bottom view of the embodiment shows thehousing 106 comprising a means to disable and enable the protraction of the shaft 202 (not shown inFigure 5a ) which is anadjustable member 500. - An embodiment of the
adjustable member 500 is a U-shaped element as shown inFigure 5b . Theadjustable member 500 of the U-shaped element comprises atop blocking plate 504 and abottom blocking plate 506. Aplate recess 502 is disposed on thebottom blocking plate 506. - With reference to
Figure 5c , theadjustable member 500 is slidable in an outward direction as indicated by adirectional arrow 50 to a first position where thetop blocking plate 504 is not placed along the path of theshaft 202 and therecess 204. As such, the protraction of theshaft 202 is enabled with the lifting of the slidingelement 104; thereby allowing padlocking of the switching device 100 (not shown inFigure 5c ). - In
Figures 5d and 5e , theadjustable member 500 is slidable in an inward direction as indicated by adirectional arrow 52 to a second position where thetop blocking plate 504 is placed along the path of theshaft 202 and therecess 204. As such, the protraction of theshaft 202 is disabled as thetop blocking plate 504 is in contact with theshaft 202 and therefore blocks theshaft 202 from entering into therecess 204; thereby disallowing the slidingelement 104 to be lifted and correspondingly hindering the padlocking of the switching device 100 (not shown inFigure 5e ). - The
plate recess 502 is to facilitate easy handling of theadjustable member 500, more specifically, to allow the user to slide theadjustable member 500 without much difficulty, for example by using a flat screw driver to push on theplate recess 502. Theplate recess 502 may also be used to wedge against thehousing 106. - Based on a similar concept, instead of the slidable adjustable member, another embodiment of the present invention (not shown in the drawings) may comprise a rotatable adjustable member having a top blocking plate. In this embodiment, the adjustable member may be rotatable axially to bring its top blocking plate into a first position to block the entry of the recess and a second position that unblocks the entry.
-
Figures 6a-6f show yet another embodiment of the invention to reversibly disable and enable the protraction of the shaft 202 (not shown inFigure 6a ). InFigure 6a , the bottom view of the embodiment shows thehousing 106 comprising arecess 204, and astorage 602 which includes astorage recess 604. Thehousing 106 further accommodates a means to disable and enable the protraction of the shaft 202 (not shown inFigure 6a ) which is anadjustable member 600. -
Figure 6b shows theadjustable member 600 disposed within thestorage recess 604 in a stored-away configuration. Theadjustable member 600, being relatively small in size and removable from theswitching device 100 may be easily misplaced during use. In the stored-away configuration, theadjustable member 600 may be stored safely within theswitching device 100 for future use. This would advantageously reduce the risk of losing theadjustable member 600. - An embodiment of the
adjustable member 600 is shown inFigure 6c . Theadjustable member 600 comprises abody 606, ahead 608 at one end ofbody 606 and a plurality of protrudingmembers 610. Thehead 608 have a circumference larger than the circumference of thebody 606 to facilitate easy insertion and extraction of theadjustable member 600 into and out the recess 204 (not shown inFigure 6c ). In the stored-away configuration ofFigure 6b , the protruding members 610 (not shown inFigure 6b ) allow theadjustable member 600 to be wedged to thehousing 106 in the storage recess 604 (not shown inFigure 6b ). Preferably, the protrudingmembers 610 are spring-biased or are made of a resilient material. -
Figure 6d illustrates that in the stored-away configuration, upon lifting the slidingelement 104, theshaft 202 is protracted into the recess 204 (not shown inFigure 6d ) as indicated by adirectional arrow 60. -
Figures 6e and 6f show theadjustable member 600 disposed within the recess 204 (not shown inFigures 6e and 6f ). Thebody 606 is insertable into therecess 204. Upon full insertion, the body 606 (not shown inFigures 6e and 6f ) of theadjustable member 600 comes into contact with theshaft 202; thereby blocking theshaft 202 and disabling the protraction of theshaft 202 in a direction as indicated by adirectional arrow 62 when attempting to lift the slidingelement 104. The protruding members 610 (not shown inFigures 6e and 6f ) allow theadjustable member 600 to be wedged within therecess 204. -
Figures 7a-7f show another embodiment of the invention to reversibly disable and enable the protraction of the shaft 202 (not shown inFigure 7a ). InFigure 7a , the bottom view of the embodiment shows thehousing 106 comprising astorage 702 which includes astorage recess 704. Thehousing 106 further accommodates a means to disable and enable the protraction of the shaft 202 (not shown inFigure 6a ), the means being anadjustable member 700. InFigure 7a , theadjustable member 700 is disposed within the recess 204 (not shown inFigure 7a ) in a first position and rotatable along a direction as indicated by adirectional arrow 70.Figure 7b shows theadjustable member 700 being rotated to a second position. Theadjustable member 700 may be removed from therecess 204 and disposed within thestorage recess 704 in a stored-away configuration (not shown). - An embodiment of the
adjustable member 700 is shown inFigure 7c . Theadjustable member 700 comprises abody 706, ahead 708 at one end ofbody 706 and a retractableprotruding element 710. Thehead 708 have a circumference larger than the circumference of thebody 706 to facilitate easy insertion and extraction of theadjustable member 700 into and out the recess 204 (not shown inFigure 7c ). Thehead 708 further comprises aslit 712 which allows the insertion of an external tool (not shown) such as a flat-head screwdriver to facilitate easy rotational action to theadjustable member 700. - For example, in a factory where the switching device 100 (not shown) is prepared for delivery purposes, the
adjustable member 700 is inserted into therecess 204 in the orientation as shown inFigure 7a .Figure 7d shows the cross-sectional side view of the insertedadjustable member 700. Theadjustable member 700 is then rotated to the orientation as shown inFigure 7b .Figure 7e shows the cross-sectional side view of the rotatedadjustable member 700 wherein the retractableprotruding element 710 is positioned aligned with a latchingedge 714 of the housing 106 (not shown inFigure 7e ). Such an arrangement of the latchingedge 714 and the retractableprotruding element 710 prevents theadjustable member 700 from accidental dropping off during delivery of theswitching device 100 or when a person handling theswitching device 100 starts pulling the slidingelement 104 before installing theswitching device 100 onto a door of the chassis encasing an electrical device (not shown inFigure 7 ). The switching device is usually delivered with theadjustable member 700 inserted into therecess 204; thereby disabling the protraction of theshaft 202 and preventing entry into therecess 204. - For use, a user may choose to disable the protraction of the shaft 202 (not shown) as illustrated in
Figure 7b or enable the protraction of the shaft 202 (not shown) by performing the steps as illustrated inFigure 7f . Theadjustable member 700 is rotated in a direction as indicated by adirectional arrow 72 to an orientation as shown inFigure 7f(ii) . At this orientation, theadjustable member 700 is removable from the recess 204 (not shown) and placeable into thestorage recess 704 as seen inFigure 7f(iii) . By rotating theadjustable member 700 in a direction as indicated by adirectional arrow 74, theadjustable member 700 is secured within thestorage recess 704 as seen inFigure 7f(iv) , whereby the retractable protruding element 710 (not shown infigure 7f ) is latched within thestorage recess 704. Theswitching device 100 is now in the stored-away configuration, wherein the protraction of theshaft 202 is enabled with the lifting of the sliding element 104 (not shown). - The arrangement of the latching
edge 714 and the retractableprotruding element 710 to prevent theadjustable member 700 from accidental dropping off or unintentional removal as described inFigure 7 , may be realized in another embodiment (not shown in the drawings), wherein a latching edge or latching recess may be located on an adjustable member while a retractable protruding element may be located on a recess receiving the adjustable member instead. In this embodiment, the adjustable member may be releasably securable within the recess by performing similar steps as described inFigure 7f . -
Figures 8a-8b show yet another embodiment of the invention to reversibly disable and enable the protraction of theshaft 202. InFigure 8a , theshaft 202 comprises twoapertures pins Figures 8a and 8b ) are inserted into the correspondingapertures directional arrows shaft 202 is prevented from entry into therecess 204; thereby hindering the lifting of the sliding element 104 (not shown inFigures 8a and 8b ). - In
Figure 8b , the wedging pins 800, 802 are moved away from theshaft 202 in directions as indicated by respectivedirectional arrows recess 204. -
Figures 9a-9b show another embodiment of the invention to reversibly disable and enable the protraction of theshaft 202, based on the similar working principle of the embodiment ofFigures 8a-8b . InFigure 9a , theshaft 202 comprises a through-hole aperture 902. An adjustable member such as awedging pin 900 is inserted through the through-hole aperture 902 in a direction as indicated by adirectional arrow 90. The wedgingpin 900 prevents theshaft 202 from entry into therecess 204.Figure 9b shows the wedgingpin 900 removed from the through-hole aperture 902 in a direction as indicated by adirectional arrow 92. In this case, the shaft is now allowed to enter therecess 204 upon lifting the sliding element 104 (not shown). - The embodiments described in
Figures 8 and9 may further comprise a channel in communication with theshaft 202. The aperture may form part of the channel. The channel allows the adjustable member to be inserted to disable the protraction of the slidingelement 104 at the designated set-point in a normal course of operation. The adjustable member may be an external adjustable member. - It will be appreciated by a person skilled in the art that numerous variations and/or modifications may be made to the present invention as shown in the specific embodiments without departing from the spirit or scope of the invention as broadly described. The present embodiments are, therefore, to be considered in all respects to be illustrative and not restrictive.
Claims (12)
- A switching device operable between different set-points comprising:a rotary control handle adapted to switch between set-points;a sliding element adapted for protraction from a resting position to an elevated position to lock the control handle at any set-point and retraction from the elevated position to the resting position to unlock the control handle;a locking member comprising a shaft and a recess, said shaft is movable in response to the protraction and retraction of the sliding element and respectively into and out the recess so as to correspondingly lock and unlock the control handle; andmeans for selectively disabling the protraction of the sliding element at a designated set-point in a normal course of operation and selectively enabling the protraction when required.
- The switching device as claimed in claim 1, wherein the means is an adjustable member for selectively preventing entry of the shaft into the recess and selectively allowing entry of the shaft into the recess.
- The switching device as claimed in claim 2, wherein the adjustable member is insertable into the recess to block the entry of the recess and removable to unblock the entry.
- The switching device as claimed in claim 3, wherein the adjustable member includes a cylindrical rod.
- The switching device as claimed in claim 3, wherein the adjustable member includes a tubular rod.
- The switching device as claimed in claim 2, wherein the adjustable member is slidable into a first position to block the entry of the recess and a second position that unblocks the entry.
- The switching device as claimed in claim 2, wherein the adjustable member is rotatable into a first position to block the entry of the recess and a second position that unblocks the entry.
- The switching device as claimed in any one of claims 2-7, wherein the adjustable member further comprises a retractable protruding member adapted for releasably securing within the recess.
- The switching device as claimed in any one of claims 2-7,
wherein the recess further comprises a retractable protruding member; and
wherein the adjustable member further comprises a latching recess adapted for receiving the retractable protruding member. - The switching device as claimed in any one of the preceding claims, wherein the shaft comprises an aperture adapted for selectively wedging and unwedging the shaft.
- A switching device operable between different set-points comprising:a rotary control handle adapted to switch between set-points;a sliding element adapted for protraction from a resting position to an elevated position to lock the control handle at any set-point and retraction from the elevated position to the resting position to unlock the control handle;a locking member comprising a shaft and a recess, said shaft is movable in response to the protraction and retraction of the sliding element and respectively into and out the recess so as to correspondingly lock and unlock the control handle; anda channel in communication with the recess or the shaft in which an external adjustable member is insertable to disable the protraction of the sliding element at a designated set-point in a normal course of operation.
- The switching device as claimed in any one of claims 2-11, further comprising a storage recess adapted for receiving the adjustable member.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SG2010039402A SG176346A1 (en) | 2010-06-04 | 2010-06-04 | A switching device |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2393092A1 true EP2393092A1 (en) | 2011-12-07 |
Family
ID=44512242
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11354029A Withdrawn EP2393092A1 (en) | 2010-06-04 | 2011-05-26 | A switching device |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2393092A1 (en) |
CN (1) | CN102280295B (en) |
SG (1) | SG176346A1 (en) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2806445A1 (en) * | 2013-05-21 | 2014-11-26 | R. Stahl Schaltgeräte GmbH | Operating attachment for operating a push button and/or switch |
WO2015119775A1 (en) * | 2014-02-06 | 2015-08-13 | Eaton Corporation | Disconnect operating handles suitable for circuit breakers and related bucket assemblies and handle interlocks |
USD762593S1 (en) | 2014-03-24 | 2016-08-02 | Eaton Corporation | Switch handle for circuit breakers |
USD765045S1 (en) | 2014-03-24 | 2016-08-30 | Eaton Corporation | Switch handle for circuit breakers |
US9484163B2 (en) | 2014-02-06 | 2016-11-01 | Eaton Corporation | Disconnect operating handles suitable for circuit breakers and related bucket assemblies |
EP3208819A1 (en) * | 2016-02-16 | 2017-08-23 | Siemens Aktiengesellschaft | Electric switch assembly |
WO2019102068A1 (en) * | 2017-11-22 | 2019-05-31 | Abb Schweiz Ag | A rotary handle construction of an electrical switch |
DE102018205453A1 (en) * | 2018-04-11 | 2019-10-17 | Siemens Aktiengesellschaft | Door unit for a control cabinet and control cabinet with such a door unit |
GB2620804A (en) * | 2022-07-19 | 2024-01-24 | Eaton Intelligent Power Ltd | Actuation knob with integrated padlocking link |
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JPH10134693A (en) * | 1996-10-31 | 1998-05-22 | Fuji Electric Co Ltd | External operating handle device of circuit breaker |
DE19939717A1 (en) * | 1999-08-21 | 2001-02-22 | Moeller Gmbh | Manual operating device electrical switching device, has rotary handle connected to drive plate within ridge with edge segments forming circle when in off position |
EP1271585A1 (en) * | 2001-06-25 | 2003-01-02 | Legrand | Manually-operated switch |
EP1729313A1 (en) * | 2005-06-02 | 2006-12-06 | Schneider Electric Industries SAS | Device for actuating an electric switching device with locking device. |
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- 2011-05-26 EP EP11354029A patent/EP2393092A1/en not_active Withdrawn
- 2011-06-03 CN CN201110148652.6A patent/CN102280295B/en active Active
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JPH10134693A (en) * | 1996-10-31 | 1998-05-22 | Fuji Electric Co Ltd | External operating handle device of circuit breaker |
DE19939717A1 (en) * | 1999-08-21 | 2001-02-22 | Moeller Gmbh | Manual operating device electrical switching device, has rotary handle connected to drive plate within ridge with edge segments forming circle when in off position |
EP1271585A1 (en) * | 2001-06-25 | 2003-01-02 | Legrand | Manually-operated switch |
EP1729313A1 (en) * | 2005-06-02 | 2006-12-06 | Schneider Electric Industries SAS | Device for actuating an electric switching device with locking device. |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2806445A1 (en) * | 2013-05-21 | 2014-11-26 | R. Stahl Schaltgeräte GmbH | Operating attachment for operating a push button and/or switch |
US9496101B2 (en) | 2014-02-06 | 2016-11-15 | Eaton Corporation | Disconnect operating handles suitable for circuit breakers and related bucket assemblies and handle interlocks |
WO2015119775A1 (en) * | 2014-02-06 | 2015-08-13 | Eaton Corporation | Disconnect operating handles suitable for circuit breakers and related bucket assemblies and handle interlocks |
US9859070B2 (en) | 2014-02-06 | 2018-01-02 | Eaton Corporation | Disconnect operating handles suitable for circuit breakers and related bucket assemblies and handle interlocks |
US9484163B2 (en) | 2014-02-06 | 2016-11-01 | Eaton Corporation | Disconnect operating handles suitable for circuit breakers and related bucket assemblies |
USD809468S1 (en) | 2014-03-24 | 2018-02-06 | Eaton Corporation | Switch handle for circuit breakers |
USD765045S1 (en) | 2014-03-24 | 2016-08-30 | Eaton Corporation | Switch handle for circuit breakers |
USD762593S1 (en) | 2014-03-24 | 2016-08-02 | Eaton Corporation | Switch handle for circuit breakers |
USD900043S1 (en) | 2014-03-24 | 2020-10-27 | Eaton Intelligent Power Limited | Switch handle for circuit breakers |
EP3208819A1 (en) * | 2016-02-16 | 2017-08-23 | Siemens Aktiengesellschaft | Electric switch assembly |
WO2019102068A1 (en) * | 2017-11-22 | 2019-05-31 | Abb Schweiz Ag | A rotary handle construction of an electrical switch |
CN111357070A (en) * | 2017-11-22 | 2020-06-30 | Abb瑞士股份有限公司 | Rotating handle structure of electric switch |
US11222758B2 (en) | 2017-11-22 | 2022-01-11 | Abb Schweiz Ag | Rotary handle construction of an electrical switch |
CN111357070B (en) * | 2017-11-22 | 2022-05-10 | Abb瑞士股份有限公司 | Rotating handle structure of electric switch |
DE102018205453A1 (en) * | 2018-04-11 | 2019-10-17 | Siemens Aktiengesellschaft | Door unit for a control cabinet and control cabinet with such a door unit |
DE102018205453B4 (en) * | 2018-04-11 | 2020-03-12 | Siemens Aktiengesellschaft | Door unit for a control cabinet and control cabinet with such a door unit |
GB2620804A (en) * | 2022-07-19 | 2024-01-24 | Eaton Intelligent Power Ltd | Actuation knob with integrated padlocking link |
Also Published As
Publication number | Publication date |
---|---|
CN102280295B (en) | 2014-08-13 |
SG176346A1 (en) | 2011-12-29 |
CN102280295A (en) | 2011-12-14 |
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