CN108269703B

CN108269703B - External operating handle

Info

Publication number: CN108269703B
Application number: CN201711439116.5A
Authority: CN
Inventors: 葛江波; 胡吉庆
Original assignee: Zhejiang Chint Electrics Co Ltd; SEARI Electric Technology Co Ltd
Current assignee: Zhejiang Chint Electrics Co Ltd; SEARI Electric Technology Co Ltd
Priority date: 2017-12-26
Filing date: 2017-12-26
Publication date: 2024-09-10
Anticipated expiration: 2037-12-26
Also published as: WO2019128289A1; CN108269703A

Abstract

The external operating handle comprises a connecting shaft connected with a switching device and a linkage piece connected with the connecting shaft, wherein the linkage piece is arranged in a shell, the top side of the shell is provided with a handle piece connected with the linkage piece, the bottom side of the linkage piece is provided with a linkage shaft groove in sliding fit with the connecting shaft, the linkage shaft groove is provided with a linkage key groove in sliding fit with a connecting key on the connecting shaft, the lower part of the linkage piece is provided with a movable locking piece and an unlocking piece connected with the locking piece, the locking piece is provided with a locking shaft hole corresponding to the linkage shaft groove, the locking shaft hole is provided with a locking key hole corresponding to the linkage key groove, the unlocking piece can drive the locking piece to move so that the locking key hole is staggered and overlapped with the linkage key groove, and the locking mechanism can realize locking and emergency release of the connecting shaft through a simple structure by arranging the locking piece matched with the connecting key on the bottom side of the linkage piece.

Description

External operating handle

Technical Field

The invention relates to the field of piezoelectric devices, in particular to an external operating handle.

Background

At present, an external operating handle is widely used for manually operating a switching apparatus such as a circuit breaker, and can be directly installed on the switching apparatus in a switch cabinet or installed on a cabinet door of the switch cabinet through a connecting shaft. The external operating handle is typically provided with a coupling shaft which is fixedly coupled at one end to the switching device and at one end to the handle means for effecting switching of the switching device between an off (off) position and a closed (on) position by operating the rotary handle means. In addition, in some situations (e.g., maintenance) the user may need to lock the rotary handle in an off position, and the handle assembly may be locked to the off assembly by a padlock to inhibit operation of the switching device. In addition, under the normal use condition, when the external operation rotary handle is in an on state (namely, the switch electrical appliance in the switch cabinet is in a closed state), the cabinet door of the switch cabinet is not allowed to be opened, and only when the handle is in an off state, the cabinet door can be opened; in an emergency, the external operating handle is required to have a cabinet door emergency release function in an on state. The dust-proof and water-proof performance of the external operating handle used by the connecting shaft directly influences the electrical safety of the switch cabinet and the switch electric appliance.

But the existing emergency release device of the external operating handle is complex in design, more in parts, high in cost and difficult to meet the requirements of dustproof and waterproof effects.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provides an external operating handle with simple structure and high reliability.

In order to achieve the above purpose, the invention adopts the following technical scheme:

The external operating handle comprises a connecting shaft 101 connected with a switching device 3 and a linkage piece 410 connected with the connecting shaft 101, wherein the linkage piece 410 is arranged in a shell, a handle piece 300 connected with the linkage piece 410 is arranged on the top side of the shell, a linkage shaft slot 411 in sliding fit with the connecting shaft 101 is arranged on the bottom side of the linkage piece 410, a linkage key slot 412 in sliding fit with a connecting key 102 on the connecting shaft 101 is arranged in the linkage shaft slot 411, a movable locking piece 420 and an unlocking piece 430 connected with the locking piece 420 are arranged below the linkage piece 410, a locking shaft hole 421 corresponding to the linkage shaft slot 411 is arranged on the locking piece 420, a locking key hole 422 corresponding to the linkage key slot 412 is arranged in the locking shaft hole 421, and the unlocking piece 430 can drive the locking piece 420 to move so that the locking key hole 422 is dislocated and overlapped with the linkage key slot 412.

Optionally, the coupling key 102 is provided with a pushing surface 104 that is matched with the locking member 420, and the pushing surface 104 can push the locking member 420 to move along the moving direction of the unlocking member 430, where the moving direction of the unlocking member 430 is set corresponding to the OFF position.

Optionally, a cylindrical locking sleeve 1212 and an unlocking sleeve 1213 are disposed in the housing and are communicated between the side wall of the housing and the locking sleeve 1212, the locking member 420 is disposed inside the locking sleeve 1212, and the unlocking member 430 is disposed inside the unlocking sleeve 1313; the inner side of the locking sleeve 1212 is correspondingly provided with two guide plates 423b arranged opposite to each other at two sides of the locking member 420, and the two sides of the locking member 420 are respectively provided with guide arms 423a in sliding fit with the guide plates 423 b.

Optionally, the locking member 420 is provided with a locking groove 432b that is matched with the unlocking member 430, one end of the unlocking member 430 is provided with a locking head 432a that is matched with the locking groove 432b, the locking head 432a includes a locking plate 432d and a locking rod 432e connected between the locking plate 432d and the unlocking member 430, the locking plate 432d is clamped into the locking groove 432b, and a avoiding hole 432c that is matched with the locking rod 432e is provided on the top side of the locking groove 432 b.

Optionally, the unlocking member 430 is provided with a unlocking head 431 at one end far away from the locking member 420, a spring retainer 434 spaced from the unlocking head 431, an unlocking seal ring 437 is provided between the unlocking head 431 and the spring retainer 434, and a locking spring 433 connected with the housing is provided at the other side of the spring retainer 434.

Optionally, a linkage bottom hole 1211 matched with the linkage piece 410 is formed in the shell, an annular limit blocking groove 413b is formed at the edge of the linkage bottom hole 1211, and a limit check ring 413a in sliding fit with the limit blocking groove 413b is formed at the bottom side of the linkage piece 410; the groove wall of the limit stop groove 413b is provided with limit stops 413c corresponding to the closed position and the open position respectively, the side surface of the limit stop ring 413a is provided with limit bosses 413d matched with the limit stops 413c, and the included angle between the two limit stops 413c and the connecting line of the axis of the connecting shaft 101 is larger than 90 degrees.

Optionally, a reaction spring 330 is disposed between the handle member 300 and the housing, two ends of the reaction spring 330 are connected to the handle member 300 and the housing respectively, and the acting force of the reaction spring 330 is the same as the direction in which the handle member 300 rotates toward the closed position.

Optionally, a handle cover 320 matched with the housing is arranged at the bottom side of the handle piece 300, a limiting groove 310b is arranged at the inner side of the handle piece 300, a limiting piece 310 capable of moving along the axial direction of the coupling shaft 101 is arranged in the limiting groove 310b, a limiting spring 312 is arranged between the limiting piece 310 and the handle cover 320, and a stop hole 310c matched with the limiting piece 310 is arranged on the side wall of the limiting groove 310 b; the restriction member 310 has a restriction lever 311 provided at the bottom side thereof, a handle restriction hole 311b for engaging with the restriction lever 311 is provided in the handle cover 320, and a housing restriction hole 311c for engaging with the restriction lever 311 is provided in the housing.

Optionally, the unlocking member 430 is cylindrical, and includes an unlocking head 431 disposed at a left end and a locking head 432a disposed at a right end, where the locking head 432a includes a locking plate 432d and a locking rod 432e connected between the locking plate 432d and the unlocking member 430, a spring retainer 434 is disposed at a right side of the unlocking head 431 at intervals, an annular unlocking seal groove 436 is formed by the left side of the spring retainer 434 and the unlocking head 431, an unlocking seal ring 437 matched with the housing is disposed in the unlocking seal groove 436, a locking spring 433 is disposed on a right side of the spring retainer 434, the left end of the locking spring 433 is abutted against the right side of the spring retainer 434 on the unlocking member 430, and the right end of the locking spring 433 is abutted against a spring ring 435 on an inner wall of the unlocking sleeve 1213.

Optionally, the locking member 420 is in a flat cylindrical shape, two guide arms 423a are disposed at the upper and lower ends of the locking member 420, the thickness of the guide arms 423a is smaller than that of the locking member 420, a guide groove 423c is formed at the top side of the locking member 420, a locking shaft hole 421 matched with the coupling shaft 101 is disposed in the middle of the locking member 420, a locking key hole 422 matched with the coupling key 102 on the coupling shaft 101 is disposed on the bottom wall of the locking shaft hole 421, a locking groove 432b connected with the unlocking member 430 is disposed at the left side of the locking member 420, the locking groove 432b is arc-shaped, and a avoiding hole 432c matched with the unlocking member 430 is disposed on the left wall of the locking groove 432 b; the coupling key 102 is hemispherical, an arc-shaped pushing surface 104 is provided at the bottom side of the coupling key 102, an arc-shaped guiding surface 105 is provided at the top side, the pushing surface 104 can push the locking member 420 along the radial direction of the coupling shaft 101, the locking member 420 can only move correspondingly along the moving direction of the unlocking member 430, and the moving direction of the unlocking member 430 is set corresponding to the OFF position.

Optionally, the linkage member 410 is in a rectangular parallelepiped shape, cambered surfaces are disposed on the left and right sides of the linkage member 410, a linkage groove 410b matched with the linkage member 410 is disposed on the bottom side of the handle member 300, a linkage boss 414 is disposed on the top side of the linkage member 410, the linkage boss 414 is fixedly connected with the handle member 300, a linkage shaft slot 411 matched with the linkage shaft 101 is disposed on the bottom side of the linkage member 410, a linkage key slot 412 matched with the linkage key 102 on the linkage shaft 101 is disposed on the left slot wall of the linkage shaft slot 411, a limit retainer ring 413a matched with the housing is disposed around the bottom side of the linkage member 410, and a limit boss 413d protruding along the radial direction is disposed on the left side of the limit retainer ring 413 a.

Optionally, the casing includes a base 110 and a cover 120, a threaded sleeve 130 is disposed at the bottom side of the base 110, the base 110 is in a flat plate shape, a base sleeve 111 matched with the threaded sleeve 130 is disposed in the middle of the bottom side, external threads are disposed at the outer side of the base sleeve 111, a fixing piece 112 is disposed at the inner side of the base sleeve 111, a fixing through hole 113 matched with the coupling shaft 101 is disposed on the fixing piece 112, the cross section of the coupling shaft 101 is rectangular, the cross section of the fixing through hole 113 is circular, a mounting through hole 114 and a release through hole 115 are disposed on the wall of the fixing through hole 113, and the mounting through hole 114 and the release through hole 115 are respectively matched with the coupling key 102 corresponding to the closing and opening positions; the four vertex angle positions of the base 110 are provided with assembling grooves 116, and the bottom side of the cover 120 is provided with assembling bosses 116b corresponding to the assembling grooves 116; the screw sleeve 130 is cylindrical, an internal thread matched with an external thread on the base sleeve 111 is arranged on the inner side of the screw sleeve 130, a sleeve retainer ring 131 is arranged at one end of the screw sleeve 130, the sleeve retainer ring 131 is arc-shaped, and a holding arm 132 is arranged on one side of the sleeve retainer ring 131.

Optionally, a handle cover 320 matched with the housing is provided on the bottom side of the handle member 300, a limiting groove 310b is provided on the inner side of the handle member 300, and a limiting member 310 capable of moving along the axial direction of the coupling shaft 101 is provided in the limiting groove 310 b; Handle cover 320 includes a cylindrical cover wall 321, and a cover plate 322 provided on the top side of cover wall 321 to be coupled to the bottom side of handle member 300, cover plate 322 having an upwardly convex arc shape, cover plate 322 constituting the bottom of limiting groove 310b, the top side of cover plate 322 being provided with a handle boss 410c at a position corresponding to the bottom of limiting groove 310b, lower spring shafts 312b provided on both sides of handle boss 410c, limiting springs 312 coupled to limiting member 310 provided on lower spring shafts 312b, a linking groove 410b provided on the inner side of handle boss 410c to be coupled to linking member 410, linking groove 410b communicating with the bottom side of cover plate 322, the bottom side of the cover plate 322 is provided with a handle spring shaft 332 and a handle limiting hole 311b, the handle spring shaft 332 and the handle limiting hole 311b are oppositely arranged at two sides, the handle spring shaft 332 is provided with a counter-force spring 330 connected with the shell, and the handle limiting hole 311b is matched with the limiting rod 311 on the limiting piece 310; The handle member 300 includes two opposite handle cheeks 318a, one end of the left side of the two handle cheeks 318a is connected by a handle short plate 318b, the other end of the right side is connected by a handle long plate 318c, the two handle cheeks 318a, the handle short plate 318b and the handle long plate 318c enclose a limiting groove 310b, one of the handle cheeks 318a is provided with a stop hole 310c at the top side thereof, the handle short plate 318b has a smaller height than the handle long plate 318c, the handle long plate 318c has the same height as the handle cheeks 318a, one end of the handle cheeks 318a connected with the handle short plate 318b is provided with a relief notch 313b, A stop arm 314 matched with the limiting piece 310 is arranged on the top side of the avoidance notch 313b, a limiting guide through hole 316bb is arranged on the handle long plate 318c, and a limiting guide shaft 316a matched with the limiting piece 310 is arranged in the limiting guide through hole 316 bb; The limiting guide shaft 316a comprises a limiting guide head 316d and a limiting guide rod 316e, one end of the limiting guide rod 316e is connected with the limiting guide head 316d, the other end of the limiting guide rod 316e stretches into the limiting guide groove 316c to be matched with the limiting guide head, and a fixing rib 316f in interference fit with the limiting guide through hole 316bb is arranged on the outer side of the limiting guide rod 316 e; The top side of the right end of the limiting piece 310 is provided with a limiting arm 313 matched with the handle piece 300, the bottom side of the limiting arm 313 is provided with a limiting arm 314b matched with the handle piece 300, the bottom side of the right end of the limiting piece 310 is provided with a limiting rod 311 matched with the handle cover 320 and the housing 120, the bottom side of the left end of the limiting piece 310 is provided with a sliding arm 315 in sliding fit with the limiting groove 310b, the left side wall of the sliding arm 315 is provided with a limiting guide groove 316c, the bottom side of the limiting piece 310 is correspondingly provided with an upper spring shaft 312a between the sliding arm 315 and the limiting rod 311, and the upper spring shaft 312a is provided with a limiting spring 312 connected with the handle cover 320.

Optionally, the cover 120 of the shell includes four side walls connected in sequence and a top wall connected to the top side of the side walls, a cover boss 122 is arranged at the bottom side of the top wall of the cover 120, a cover groove 321b is arranged at the top side of the top wall of the cover 120 corresponding to the cover boss 122, and the cover boss 122 is a flat cylinder; the middle part of the top wall of the housing 120 is provided with a linkage bottom hole 1211 matched with the linkage piece 410, the top side of the linkage bottom hole 1211 is communicated with the bottom of the housing boss 122, the bottom side of the linkage bottom hole 1211 is communicated with the bottom side of the housing boss 122, the bottom side of the housing boss 122 is correspondingly provided with a limit stop groove 413b at the outer side of the linkage bottom hole 1211, the limit stop groove 413b is matched with a limit stop 413a at the bottom side of the linkage piece 410, the side wall of the limit stop groove 413b is provided with a limit stop 413c in limit fit with the limit stop 413a, the bottom side of the housing boss 122 is correspondingly provided with a cylindrical locking sleeve 1212 at the outer side of the limit stop groove 413b, the inner side of the locking sleeve 1212 is provided with a locking piece 420, the inner side wall of the locking sleeve 1212 is provided with two guide plates 423b matched with the locking piece 420, the guide plates 423b are oppositely arranged at two sides of the locking piece 420, the left and right ends at the outer side of the locking sleeve 1212 are respectively provided with an unlocking sleeve 1213 and a limit boss 311d, the unlocking sleeve 1213 is connected with the locking sleeve 1212, the unlocking sleeve is internally provided with the limit stop 413c in limit stop 311c connected with the limit boss 311c at the side of the limit sleeve 311; the bottom of the cover groove 321b is provided with a cover spring shaft 331 and a cover restricting hole 311c, the cover spring shaft 331 is provided with a reaction spring 330 connected with the handle cover 320 of the handle member 300, the cover restricting hole 331c is matched with the restricting rod 311c of the restricting member 310 on the handle member 300, and a restricting convex rib 311e which is in sliding fit with the restricting rod 311c is arranged between the cover spring shaft 331 and the cover restricting hole 311 c.

According to the external operating handle, the locking piece 420 matched with the connecting key 101a is arranged on the bottom side of the linkage piece 410, so that the locking mechanism 420 can lock and release the connecting shaft 101 in an emergency manner through a simple structure, other structures do not need to be machined on the connecting shaft 101, the manufacturing cost is reduced, and the reliability of the connecting shaft 101 is ensured. In addition, the cooperation of the guide arms 423a and the guide plates 423b provides guiding and limiting functions for the movement of the locking piece 420, so that the moment applied to the locking piece 420 can be balanced when the locking piece 420 stops the connecting key 102, and reliability and safety are improved. In addition, the restoring force of the external operation handle to be turned off can be enhanced by the reaction spring 330, and the reliability of the normal operation of the external operation handle can be ensured.

Drawings

FIG. 1 is a schematic view of the structure of an external operating handle of the present invention;

FIG. 2 is an exploded view of the handle assembly of the present invention;

FIG. 3 is a cross-sectional view of the handle assembly of the present invention;

FIG. 4 is a schematic view of the structure of the coupling shaft of the present invention;

FIG. 5 is a locking position of the locking element of the present invention when closed;

FIG. 6 is an unlocked position of the locking member when the present invention is closed;

FIG. 7 is a schematic view of the engagement of the locking member with the linkage member when the present invention is turned off;

FIG. 8 is a schematic view of the underside of the housing of the present invention;

FIG. 9 is a schematic view of the top side of the closure of the present invention;

FIG. 10 is a schematic view of the structure of the top side of the linkage of the present invention;

FIG. 11 is a schematic view of the structure of the underside of the linkage of the present invention;

FIG. 12 is a schematic view of the top side of the locking element of the present invention;

FIG. 13 is a schematic view of the structure of the underside of the locking element of the present invention;

FIG. 14 is a schematic view of the structure of the unlocking member of the present invention;

FIG. 15 is another schematic view of the structure of the unlocking member of the present invention;

FIG. 16 is a schematic view of the construction of the reaction spring of the present invention;

FIG. 17 is a schematic view of the top side of the handle member of the present invention;

FIG. 18 is another schematic view of the top side of the handle member of the present invention;

FIG. 19 is a schematic view of the underside of the handle member of the present invention;

FIG. 20 is a schematic view of the mating of the handle cover and the housing of the present invention;

FIG. 21 is a schematic view of the structure of the underside of the limiter of the present invention;

FIG. 22 is a schematic view of the structure of the top side of the limiter of the present invention;

FIG. 23 is a schematic illustration of the engagement of the limiter with the handle member of the present invention;

FIG. 24 is a schematic view of the structure of the restraining guide shaft of the present invention;

FIG. 25 is a schematic view of the structure of the underside of the base of the present invention;

FIG. 26 is a schematic view of the structure of the top side of the thread form of the present invention;

FIG. 27 is a schematic view of the structure of the bottom side of the thread form of the present invention;

FIG. 28 is a schematic view of the structure of the housing seal ring of the present invention;

FIG. 29 is a compensating schematic view of the coupling device of the present invention;

FIG. 30 is a schematic view of the structure of the connector of the present invention;

FIG. 31 is a schematic view of another angle of the connector of the present invention;

FIG. 32 is a schematic view of the structure of the bracket plate of the present invention;

FIG. 33 is a schematic view of the structure of the calibration plate of the present invention;

FIG. 34 is a schematic view of a second buckle of the present invention;

FIG. 35 is a schematic view of the first buckle of the present invention;

Fig. 36 is a schematic structural view of the switching device of the present invention.

Detailed Description

Embodiments of the external operating handle of the present invention are further described below with reference to the examples shown in fig. 1 to 36. The external operating handle of the present invention is not limited to the description of the following embodiments.

As shown in fig. 1, the external operating handle of the present invention includes a coupling device 1 and a handle device 2, and a coupling shaft 101 connected between the coupling device 1 and the handle device 2, the coupling device 1 is connected with a switching device 3 (for example, a handle of a circuit breaker or an isolator) installed inside a switchgear, the handle device 2 is installed outside a cabinet door 4 of the switchgear for manual operation, and normally, the switching device 3 can be operated, for example, switched between an OFF (OFF) position and a closed (ON) position, directly through the handle device 2 without opening the cabinet door 4 of the switchgear. In addition, in order to ensure the safety inside the switchgear, when the switching device 3 is in the closed state, the connection shaft 101 is kept locked with the handle device 2, ensuring that the cabinet door 4 of the switchgear cannot be opened, and the cabinet door 4 of the switchgear is allowed to be opened only when the switching device 3 is in the off position, but in an emergency, even if the switching device 3 is in the closed state, the cabinet door 4 of the switchgear still needs to be opened rapidly, so that personnel can observe and operate the inside of the switchgear.

As shown in fig. 2-4, the handle device 2 comprises a housing formed by a base 110 and a cover 120, a handle 300 for manual screwing operation is arranged on the top side of the cover 120, a threaded sleeve 130 matched with a cabinet door 4 of the switch cabinet to form a cylinder shape is arranged on the bottom side of the base 110, a linkage piece 410 is fixedly connected with the handle 300, a connecting shaft 101 passes through the threaded sleeve 130 from the bottom side and extends into the linkage piece 410 to be connected, and the handle 300 drives the connecting shaft 101 to rotate around the axis of the connecting shaft 101 through the linkage piece 410.

The bottom side of the linkage piece 410 is provided with a linkage shaft slot 411 in sliding fit with the linkage shaft 101, the side of the linkage shaft 101 connected with the linkage piece 410 is provided with a linkage key 102, the slot wall of the linkage shaft slot 411 is integrally provided with a linkage key slot 412 in sliding fit with the linkage key 102 (fig. 11), and the linkage shaft 101 can axially slide in and slide out of the linkage piece 410;

As shown in fig. 5 to 6, a movable locking member 420 and an unlocking member 430 connected with the locking member 420 are provided below the linkage member 410, a locking shaft hole 421 corresponding to the linkage shaft slot 411 is provided in the middle of the locking member 420, a locking key hole 422 corresponding to the linkage key slot 412 is provided on the wall of the locking shaft hole 421, the linkage shaft 101 passes through the locking member 420 from the base 110 at the bottom side to extend into the linkage member 410, and the unlocking member 430 can drive the locking member 420 to move along the radial direction of the linkage shaft 101, so that the locking key hole 422 is dislocated and overlapped with the linkage key slot 412;

as shown in fig. 5, when the locking key hole 422 is misaligned with the linkage key groove 412, the locking member 420 can abut against the bottom side of the coupling key 102 to lock the coupling shaft 101 with the linkage member 410, as shown in fig. 6, when the locking key hole 422 coincides with the linkage key groove 412, the locking member 420 has no restraining effect on the coupling shaft 101, and the coupling shaft 101 can freely pass through the locking key hole 422 and the linkage key groove 412 to achieve rapid unlocking of the coupling shaft 101.

According to the external operating handle, the locking piece 420 matched with the connecting key 101a is arranged on the bottom side of the linkage piece 410, so that the locking mechanism 420 can lock and unlock the connecting shaft 101 through the structure, other structures do not need to be processed and manufactured on the connecting shaft 101, the manufacturing cost is reduced, the reliability of the connecting shaft 101 is ensured, and the design is ingenious.

Of course, the locking member 420 may not be provided with the locking shaft hole 421, the linkage shaft 101 does not need to pass through the locking member 420, the locking member 420 may be provided on one side of the linkage shaft 101 to directly block and avoid the coupling key 102, or a groove body may be machined on the coupling shaft 101, and the locking member 420 is embedded in and separated from the groove body to lock and unlock the coupling shaft 101, which falls into the protection scope of the present invention.

Fig. 7 is a schematic diagram of the linkage member 410 when rotated to a closing (OFF) position, the linkage member 102 is hemispherical, an arc-shaped pushing surface 104 is provided at the bottom side of the linkage member 102, an arc-shaped guiding surface 105 is provided at the top side, the guiding surface 105 is capable of facilitating the locking of the linkage member 102 into the locking member 420, the pushing surface 104 is capable of pushing the locking member 420 away from the linkage shaft 101 along the connection line direction of the axis of the linkage member 101, namely, along the radial direction of the linkage shaft 101, and the locking member 420 is capable of moving correspondingly along the movement direction of the unlocking member 430 under the action of the locking sleeve 1212, the guide plate 423b and the unlocking member 430, namely, the movement direction of the locking member 420 is the same as the movement direction of the unlocking member 430, the movement direction of the unlocking member 430 is set corresponding to the closing (OFF) position, and driving the linkage member 102 to move to the movement direction of the unlocking member 430 only when the linkage shaft 101 rotates to the closing position, so that the locking member 420 is pushed along the radial direction of the linkage member 101 to overcome the action of the linkage member 430, and the linkage member 420 is capable of moving away from the linkage member 101 along the direction of the axis 101, and the linkage member 101 is easy to be mounted, and the linkage member is easy to realize, and the linkage member is easy to be free from the operation and the linkage member has a long-service life when the linkage structure is required to be mounted and easy when the linkage member is opposite to the linkage member and the linkage member is mounted.

Referring to fig. 8 and 10, a linkage bottom hole 1211 is formed in the middle of the casing 120 and cooperates with the linkage member 410, an annular limit stop slot 413b is formed at the edge of the linkage bottom hole 1211 on the bottom side of the casing 120, and a limit retainer 413a slidably cooperates with the limit stop slot 413b is integrally formed on the bottom side of the linkage member 410, so as to prevent the linkage member 410 from being separated from the casing from the top side of the casing 120.

Further, the groove wall of the limit stop groove 413b is provided with limit stops 413c corresponding to the ON and OFF positions respectively, the side surface of the limit stop ring 413a is provided with limit bosses 413d protruding radially and matching with the limit stops 413c, the limit bosses 413d are stopped by the limit stops 413c to limit the limit rotation position of the linkage member 410, and further limit the limit rotation position of the handle member 300, and the limit bosses 413d are preferably arranged at one side close to the linkage key groove 412 (fig. 11).

Furthermore, the included angle between the two limit stops 413c and the axis line of the connecting shaft 101 is greater than 90 degrees, and the included angle between the two limit stops 413c and the axis line of the connecting shaft 101 is preferably 110 degrees, so that the installation clearance between the internal parts of the external operating handle and the installation clearance between the external operating handle and the switching device 3 can be compensated, the reliability is improved, and the assembly error of the parts, the requirement of the actual use place and the abrasion of each part at the later stage are considered.

Referring to fig. 8 and 12, the bottom side of the cover 120 is provided with a cylindrical locking sleeve 1212 outside the limit stop slot 413b, and an unlocking sleeve 1213 connected between the side wall of the cover 120 and the locking sleeve 1212, the locking member 420 is disposed inside the locking sleeve 1212, the unlocking member 430 is disposed inside the unlocking sleeve 1313, one end of the unlocking member 430 extends into the locking sleeve 1212 to be connected with the locking member 420, the other end is exposed out of the cover 120 to be matched with an external power source, and the external power source can be provided by manual pressing or can be a remote control machine.

Further, two opposite guide plates 423b are disposed on the side walls of the locking sleeve 1212 corresponding to the two sides of the locking member 420, one opposite side of the guide plates 423b is a rectangular plane, the opposite side is a cambered surface, the length direction of the rectangular plane is set along the moving direction of the locking member 420, the distance between the two rectangular planes is greater than the outer diameter of the limit stop groove 413b, guide arms 423a slidably engaged with the guide plates 423b are disposed on the two sides of the locking member 420, the thickness of the guide arms 423a is smaller than that of the locking member 420, guide grooves 423c are formed on the top side of the locking member 420, chamfers are disposed on the two ends of the guide arms 423a, the cooperation of the guide arms 423a and the guide plates 423b provides guiding and limiting effects for the movement of the locking member 420, the moment received on the locking member 420 can be balanced when the locking member 420 stops the connecting key 102, and reliability and safety are improved, wherein one guide arm 423a is preferably disposed on one side close to the locking key hole 422.

Referring to fig. 12 and 14, an unlocking head 431 exposing the cover 120 for a person to operate is provided at one end of the unlocking member 430, a knife slot 4311 matching with a tool (such as a screwdriver) is provided at an end surface of the unlocking head 431, a locking head 432a connected with the locking member 420 is provided at the other end, and a locking groove 432b matching with the locking head 432a is provided at the locking member 420. The cross section of the locking head 432a is T-shaped, which comprises a locking plate 432d and a locking rod 432e connected between the locking plate 432d and the unlocking member 430, wherein the locking plate 432d is clamped into the locking groove 432b, a avoiding hole 432c matched with the locking rod 432e is arranged at the top side of the groove wall of the locking groove 432b, and the locking rod 432e is clamped into the avoiding hole 432c, so that the integral structure of the external operating handle of the invention can be reduced, the contact area between the unlocking member 430 and the locking member 420 can be increased, and the matching reliability is improved.

Further, a locking spring 433 (fig. 2) connected with the housing 120 is arranged on the unlocking member 430, the locking spring 433 can drive the unlocking member 430 to drive the locking member 420 to move towards the locking coupling shaft 101, a spring retainer 434 matched with one end of the locking spring 433 is arranged on the unlocking member 430, a spring ring table 435 (fig. 8) matched with the other end of the locking spring 433 is arranged on the inner wall of the unlocking sleeve 1213, an unlocking seal groove 436 is formed by the spring retainer 434 and an unlocking head 431 of the unlocking member 430 at intervals, an unlocking seal ring 437 (fig. 2) matched with the inner wall of the unlocking sleeve 1213 is arranged in the unlocking seal groove 436, and the waterproof property and the dustproof property of the shell can be improved by matching the unlocking seal ring 437 with the unlocking sleeve 1213; the locking piece 420 can be unlocked to the coupling shaft 101 by pressing the unlocking head 431 against the action of the locking spring 433, and after the pressing force disappears, the locking spring 433 drives the unlocking piece 430 and the locking piece 420 to reset, so that the unlocking device is simple in structure, low in cost, reliable in action and high in unlocking speed. Of course, the locking spring 433 may also be disposed on the locking member 420 and connected to the locking member 420, which is also included in the protection scope of the present invention.

Fig. 14-15 show an embodiment of the unlocking member 430, wherein the unlocking member 430 is cylindrical, and comprises an unlocking head 431 arranged at the left end and a locking head 432a arranged at the right end, the locking head 432a comprises a locking plate 432d and a locking rod 432e connected between the locking plate 432d and the unlocking member 430, a spring retainer 434 is arranged at the right side of the unlocking head 431 at intervals, an annular unlocking seal groove 436 is formed by the left side of the spring retainer 434 and the unlocking head 431, an unlocking seal ring 437 matched with an unlocking sleeve 1213 of the housing 120 is arranged in the unlocking seal groove 436, a locking spring 433 is arranged at the right side of the spring retainer 434, the left end is abutted against the right side of the spring retainer 434 on the unlocking member 430 in a sleeved mode, and the right end is abutted against a spring ring table 435 on the inner wall of the unlocking sleeve 1213.

Fig. 12 shows a top side view angle of the locking member 420, fig. 13 shows a bottom side view angle of the locking member 420, the locking member 420 is in a flat cylindrical shape, two guide arms 423a are arranged at the upper and lower ends of the locking member 420, the thickness of the guide arms 423a is smaller than that of the locking member 420, a guide groove 423c is formed at the top side of the locking member 420, a locking shaft hole 421 matched with the coupling shaft 101 is arranged in the middle part of the locking member 420, a locking key hole 422 matched with the coupling key 102 on the coupling shaft 101 is arranged on the bottom side hole wall of the locking shaft hole 421, a locking groove 432b connected with the unlocking member 430 is arranged at the left side of the locking member 420, the locking groove 432b is in an arc shape, and a dodging hole 432c matched with the unlocking member 430 is arranged on the left side groove wall of the locking groove 432 b.

Fig. 10 shows a top side view angle of the linkage member 410, fig. 11 shows a bottom side view angle of the linkage member 410, the linkage member 410 is in a rectangular shape, cambered surfaces are arranged on the left side and the right side of the linkage member 410, a linkage groove 410b (fig. 3) matched with the linkage member 410 is arranged on the bottom side of the handle member 300, a linkage boss 414 is arranged on the top side of the linkage member 410, a linkage top hole 416 matched with the linkage boss 414 is arranged on the top side of the linkage groove 410b, the linkage boss 414 penetrates through the linkage top hole 416 to be fixedly connected with the handle member 300 through a combination screw 415, the shape of the linkage groove 410b is matched with that of the linkage member 410, a linkage shaft slot 411 matched with the linkage shaft 101 is arranged on the bottom side of the linkage member 410, a limit retainer 413a matched with the shell is arranged on the wall on the left side of the linkage shaft slot 411, and a limit boss 413d protruding along the radial direction is arranged on the left side of the limit retainer 413 a.

Further, the top side of the linkage member 410 is provided with a linkage boss 414, the linkage boss 414 is provided with a threaded hole matched with the combined screw 415, the top side of the linkage groove 410b of the handle member 300 is provided with a linkage top hole 416 (fig. 3) matched with the linkage boss 414, the rod portion of the combined screw 415 can penetrate through the linkage top hole 416 to be connected with the linkage boss 414, the head of the combined screw 415 abuts against the edge of the top side of the linkage top hole 416 to form a connection, and linkage sealing rings 417 matched with the inner wall of the linkage top hole 416 are arranged around the linkage boss 414, so that the tightness of the external operating handle can be effectively improved through the linkage sealing rings 417. Of course, the linkage boss 414 may not be provided, the linkage top hole 416 may be directly matched with the top side of the linkage member 410, and the linkage sealing ring 417 may be directly provided around the top side of the linkage member 410, which falls within the protection scope of the present invention.

16-18, The underside of the handle member 300 is provided with a handle cover 320 which mates with the housing 120, the handle cover 320 mates with the top side of the housing 120 to prevent dust and moisture from entering the housing, particularly through the cooperating top aperture 416; a restricting groove 310b is provided on the inner side of the handle member 300, a restricting piece 310 which is movable in the axial direction of the coupling shaft 101 is provided in the restricting groove 310b, the restricting piece 310 is rotatable with the handle member 300, and the restricting piece 310 can lock the handle member 300 when the handle member 300 is rotated to the OFF position, so that the handle member 300 cannot be rotated.

Referring to fig. 19, the handle cover 320 includes a cylindrical cover wall 321, and a cover plate 322 disposed on the top side of the cover wall 321 and connected to the bottom side of the handle member 300, wherein the cover plate 322 forms the bottom of the limiting groove 310b, a cover groove 321b for accommodating the cover wall 321 is disposed on the top side of the cover 120, the cover groove 321b is slidably engaged with the cover wall 321, and the top side of the linkage top hole 416 is communicated with the bottom side of the cover groove 321b (fig. 9);

The bottom side of the cover groove 321b is provided with a plurality of lower seal cylinders 323a (fig. 9) corresponding to the outer side of the linkage top hole 416, the plurality of lower seal cylinders 323a are coaxially arranged and are in a ripple shape with gradually increased radius, a lower seal groove 324b is formed between two adjacent lower seal cylinders 323a, the bottom side of the cover plate 322 is provided with a plurality of upper seal cylinders 324a corresponding to the lower seal groove 324b, an upper seal groove 323b matched with the lower seal cylinder 323a is formed between two adjacent upper seal cylinders 324a, and a labyrinth structure (fig. 19) formed between the lower seal cylinders 323a, the lower seal groove 324b, the upper seal cylinders 324a and the upper seal groove 323b in a layer-by-layer manner can effectively improve the tightness in the shell and prevent dust and water vapor from entering the shell.

Further, the cover shell 120 is provided with the cover shell drain grooves 325a communicated between the cover shell 321b and the outer wall of the cover shell 120 around the cover shell 321b, and the cover shell 321 is provided with the handle drain grooves 325b corresponding to the cover shell drain grooves 325a, so that water vapor can be effectively discharged out of the shell, the waterproof effect is improved, the structure is simple, the assembly is convenient, and the cost is low.

Further, the housing drain grooves 325a and the handle drain grooves 325b are provided in the housing 120 and the handle cover 120 in the same number and center symmetry, and each time the handle member 300 is rotated in either direction, the handle drain grooves 325b can communicate with the housing drain grooves 325a which are not rotated to form a channel for draining the water vapor in the housing, thereby enabling a smoother draining effect.

Still further, the handle drain groove 325b is opened towards the bottom side of the cover groove 321b in a semicircular shape, and the opening of the handle drain groove 325b abuts against the cover groove 321b to be spliced with the cover 120 to form a drain channel, so that the drain channel has the characteristic of being convenient for manufacturing and processing, and the shape of the cover drain groove 325a is preferably matched with that of the handle drain groove 325b, so that the drain effect is better.

Referring to fig. 16, 9, and 19, a reaction spring 330 is disposed between the handle cover 320 and the housing 120, two ends of the reaction spring 330 are respectively connected with the handle cover 320 and the housing 120, the acting force of the reaction spring 330 is the same as the direction of the handle member 300 from the closed (ON) position to the OFF (OFF) position, and since the OFF restoring forces of different switching devices 3 are different, it is possible that the switching devices 3 rotate back to the OFF (OFF) position with the handle member 300 being fixed, the restoring force of the external operation handle can be enhanced by the reaction spring 330, and the reliability of the normal operation of the external operation handle is ensured.

Further, the reaction spring 330 is a compression spring or a tension spring, a housing spring shaft 331 is disposed at the bottom side of the housing groove 321b of the housing 120, a handle spring shaft 332 is disposed at the bottom side of the housing plate 322, the housing spring shaft 331 and the handle spring shaft 332 are L-shaped and are disposed opposite to each other, and two ends of the reaction spring 330 are respectively sleeved on the housing spring shaft 331 and the handle spring shaft 332. Of course, the reaction spring 330 may be connected to other positions between the handle cover 320 and the cover 120, or a torsion spring may be used.

Referring to fig. 22, the bottom side of the limiting member 310 is provided with a limiting rod 311, the cover plate 322 of the handle cover 320 is provided with a handle limiting hole 311b (fig. 19) corresponding to the bottom side of the limiting groove 310b, the bottom side of the cover groove 321b of the cover 120 is provided with a cover limiting hole 311c corresponding to the limiting rod 311, the cover 120 does not rotate with the handle 300 and the limiting member 310, the cover limiting hole 311c is correspondingly arranged at a position corresponding to the limiting rod 311 when the handle 300 is at the OFF position, and when the handle 300 is at the OFF position, the limiting member 310 is pressed to drive the limiting rod 311 to sequentially pass through the handle limiting hole 311b and the cover limiting hole 311c, so that the handle 300 cannot rotate relative to the cover 120;

The handle 300 is provided with a stop hole 310c for inserting a stop member (not shown) on the side wall of the limit slot 310b, when the limit member 310 is pressed down, the stop member can be inserted above the limit member 310 through the stop hole 310c, and the stop member can block the limit rod 311 from leaving the housing limit hole 311c on the housing 120, so that the limit member 310 keeps the locking state of the handle 300, the stop hole 310c is preferably in a waist-round shape, and the stop member is preferably a padlock, and the padlock can be one or a plurality of padlocks.

Further, a limiting spring 312 (fig. 2) is disposed between the limiting member 310 and the handle cover 320, an upper spring shaft 312a is disposed at the bottom side of the limiting member 310, a lower spring shaft 312b (fig. 21) corresponding to the upper spring shaft 312a is disposed at the top side of the handle cover 320, both ends of the limiting spring 312 are respectively sleeved on the upper spring shaft 312a and the lower spring shaft 312b and abut against the limiting member 310 and the handle cover 320, the acting force of the limiting spring 312 pushes the limiting rod 311 of the limiting member 310 along the axial direction of the coupling shaft 101 to leave a cover limiting hole 311c on the cover 120, limiting arms 313 are disposed at the left side and the right side of the limiting member 310, a relief notch 313b which is matched with the limiting arm 313 is disposed at one side of the limiting groove 310b, the relief notch 313b comprises a relief transverse surface 313c which is matched with the bottom side of the limiting arm 313, and a relief longitudinal surface 313d which is disposed at a certain distance on one side of the limiting arm 313, a stop arm 313 extending toward the top side of the limiting member 313 is disposed at the top side of the limiting transverse surface 313d, a stop arm 314 extending toward the limiting arm 313 is disposed at the top side of the limiting member 314b, and the bottom side of the limiting arm 314b can be prevented from being separated from the limiting arm 314b by the limiting member 310. Preferably, the thickness of the limiting arm 314b is equal to that of the limiting arm 313, so that the assembly is more attractive and the assembly difficulty can be reduced.

Further, a sliding arm 315 slidably engaged with the limiting slot 310b is provided on the bottom side of the limiting member 310 far from the other end of the limiting arm 313, so as to perform a moment balancing function on the limiting rod 311, a limiting guide slot 316c is provided on the outer side of the sliding arm 315, a limiting guide shaft 316a extending into the limiting guide slot 316c is provided on the side wall of the limiting slot 310b, the limiting guide shaft 316a is tangential to the side wall of the limiting guide slot 316c, and a guiding and limiting function can be provided for the movement of the limiting member 310 through the limiting guide shaft 316 a. Preferably, the two sides of the limiting guide groove 316c are provided with process through holes 317, and the process through holes 317 can play roles of uniform thickness, material saving and weight saving.

Referring to fig. 24 showing an embodiment of the restricting guide shaft 316a, the restricting guide shaft 316a includes a restricting guide head 316d and a restricting guide rod 316e, one end of the restricting guide rod 316e is connected with the restricting guide head 316d, the other end extends into the restricting guide groove 316c to cooperate, the handle member 300 is provided with a restricting guide blind hole 316b (fig. 18) on the sidewall of the restricting groove 310b to cooperate with the restricting guide head 316d, a restricting guide through hole 316bb cooperating with the restricting guide rod 316e is provided in the restricting guide blind hole 316a, and a fixing rib 316f in interference fit with the restricting guide through hole 316bb is provided on the outer side of the restricting guide rod 316 e.

As shown in fig. 17, in one embodiment of the handle member 300, a handle cover 320 is provided on the bottom side of the handle member 300 to be engaged with the cover case 120, a restricting groove 310b is provided on the inner side of the handle member 300, and a restricting piece 310 movable in the axial direction of the coupling shaft 101 is provided in the restricting groove 310 b;

Handle cover 320 includes a cylindrical cover wall 321, and a cover plate 322 provided at the top side of cover wall 321 to be coupled to the bottom side of handle member 300, cover plate 322 having an upwardly convex arc shape, cover plate 322 constituting the bottom of limiting groove 310b, the top side of cover plate 322 being provided with a handle boss 410c at a position corresponding to the bottom of limiting groove 310b, lower spring shafts 312b provided at both sides of handle boss 410c, limiting springs 312 coupled to limiting member 310 provided on lower spring shafts 312b, a linking groove 410b provided at the inner side of handle boss 410c to be coupled to linking member 410, linking groove 410b communicating with the bottom side of cover plate 322, the bottom side of cover plate 322 being provided with a plurality of upper seal cylinders 324a corresponding to the outer side of linking groove 410b, the plurality of upper seal cylinders 324a are coaxially arranged and are in a ripple shape with gradually increased radius, an upper seal groove 323b is formed between two adjacent upper seal cylinders 324a, the upper seal cylinders 324a and the upper seal groove 323b are matched with the housing 120, a handle spring shaft 332 and a handle limiting hole 311b are arranged between the upper seal cylinder 324a at the outermost side of the bottom side of the cover plate 322 and the housing wall 321, the handle spring shaft 332 and the handle limiting hole 311b are oppositely arranged at two sides of the upper seal cylinder 324a, a counter force spring 330 connected with the housing 120 is arranged on the handle spring shaft 332, the handle limiting hole 311b is matched with the limiting rod 311 on the limiting piece 310, and a handle drainage groove 325b matched with the housing 120 is arranged at the bottom side of the housing wall 321;

The handle 300 includes two opposite handle cheeks 318a, one end of the left side of the two handle cheeks 318a is connected by a handle short plate 318b, the other end of the right side is connected by a handle long plate 318c, the two handle cheeks 318a, the handle short plate 318b and the handle long plate 318c enclose a limiting groove 310b, a stop hole 310c is arranged at the top side of one handle cheek 318a, the height of the handle short plate 318b is smaller than that of the handle long plate 318c, the handle long plate 318c is the same as that of the handle cheek 318a, a avoidance notch 313b is respectively arranged at one end of the handle cheek 318a connected with the handle short plate 318b, a stop arm 314 matched with the limiting piece 310 is arranged at the top side of the avoidance notch 313b, a limiting guide through hole 316bb is arranged on the handle long plate 318c, and a limiting guide shaft 316a matched with the limiting piece 310 is arranged in the limiting guide through hole 316 bb.

Referring to fig. 22, an embodiment of the restriction member 310 is shown, a restriction arm 313 engaged with the handle member 300 is provided at a top side of a right end of the restriction member 310, a restriction arm 314b engaged with the handle member 300 is provided at a bottom side of the restriction arm 313, a restriction lever 311 engaged with the handle cover 320 and the housing 120 is provided at a bottom side of a right end of the restriction member 310, a slide arm 315 slidably engaged with the restriction groove 310b is provided at a bottom side of a left end of the restriction member 310, a restriction guide groove 316c is provided at a left side wall of the slide arm 315, an upper spring shaft 312a is provided at a bottom side of the restriction member 310 corresponding to between the slide arm 315 and the restriction lever 311, and a restriction spring 312 connected to the handle cover 320 is provided at the upper spring shaft 312 a.

Referring to fig. 25, the base 110 is in a flat plate shape, the middle part of the bottom side is provided with a base sleeve 111 matched with the thread bush 130, the outer side of the base sleeve 111 is provided with external threads, the inner side of the base sleeve 111 is provided with a fixing piece 112, the fixing piece 112 is provided with a fixing through hole 113 matched with the coupling shaft 101, the cross section of the coupling shaft 101 is rectangular, the cross section of the fixing through hole 113 is circular, the wall of the fixing through hole 113 is provided with a mounting through hole 114 and a release through hole 115, the mounting through hole 114 is matched with the coupling key 102 corresponding to the OFF position, the coupling shaft 101 is convenient to pass through and be connected with the linkage piece 410, the release through hole 115 is matched with the coupling key 102 corresponding to the ON position, and the coupling shaft 101 can leave the shell when in emergency release;

The four vertex angle positions of the base 110 are provided with assembly grooves 116, the bottom side of the housing 120 is provided with assembly bosses 116b (fig. 8) corresponding to the assembly grooves 116, the assembly bosses 116b are matched with the assembly grooves 116 to prevent the base 110 from being misplaced, the bottom side of the base 110 is respectively provided with base blind holes 117 at the inner side positions of the four assembly grooves 116, the base blind holes 117 are provided with base threaded holes 117b, the bottom side of the housing 120 is provided with housing threaded holes 117c corresponding to the base threaded holes 117b, and the base threaded holes 117b and the housing threaded holes 117c are matched with screws to enable the base 110 and the housing 120 to form fixed connection.

Referring to fig. 26, the screw sleeve 130 is cylindrical, an internal thread matching with an external thread on the base sleeve 111 is provided on the inner side of the screw sleeve 130, a sleeve retainer 131 is provided at one end of the screw sleeve 130, a holding arm 132 is provided on one side of the sleeve retainer 131, the holding arm 132 can increase the reliability and convenience of mounting the hand-held rotary screw sleeve 130 when screwing the screw sleeve 130, reduce the difficulty of mounting, and the sleeve retainer 131 is arc-shaped, and plays a role in guiding the coupling shaft 101 during mounting.

Fig. 8 is a bottom side view of the housing 120, fig. 9 is a top side view of the housing 120, the housing 120 includes four side walls connected in sequence and a top wall connected to the top side of the side walls, the bottom side of the top wall of the housing 120 is provided with a housing boss 122, the top side of the top wall of the housing 120 is provided with a housing groove 321b corresponding to the housing boss 122, the housing boss 122 is in a flat cylinder, the housing boss 122 is connected with the side wall of the housing 120 at the nearest position to the side wall of the housing 120, a housing drain groove 325a communicated with the housing groove 321b is provided at the connection position of the housing boss 122 and the side wall of the housing 120, the housing boss 122 is provided with a housing thread boss 117d at the farthest position to the side wall of the housing 120, the housing thread boss 117d is provided with a housing thread hole 117c, and the housing thread hole 117c is fixedly connected with the base 110 by a screw;

The middle part of the top wall of the housing 120 is provided with a linkage bottom hole 1211 matched with the linkage piece 410, the top side of the linkage bottom hole 1211 is communicated with the bottom of the housing groove 321b, the bottom side of the linkage bottom hole 1211 is communicated with the bottom side of the housing boss 122, the bottom side of the housing boss 122 is correspondingly provided with a limit stop groove 413b at the outer side of the linkage bottom hole 1211, the limit stop groove 413b is matched with a limit stop 413a at the bottom side of the linkage piece 410, the side wall of the limit stop groove 413b is provided with a limit stop 413c in limit fit with the limit stop 413a, the bottom side of the housing boss 122 is correspondingly provided with a cylindrical locking sleeve 1212 at the outer side of the limit stop groove 413b, the inner side of the locking sleeve 1212 is provided with a locking piece 420, the inner side wall of the locking sleeve 1212 is provided with a guide plate 423b matched with the locking piece 420, the guide plate 423b is oppositely arranged at two sides of the locking piece 420, the left and right ends at the outer side of the locking sleeve 1212 are respectively provided with an unlocking sleeve 1213 and a limit boss 311d, the unlocking sleeve 1213 is connected with the locking sleeve 1212, the unlocking sleeve 1212 is internally provided with a limit stop 413c in limit stop 311c connected with the limit boss 311c at the side of the limit sleeve 311c;

The top side of the top wall of the housing 120 is correspondingly provided with an ON position mark and an OFF position mark ON the outer side of the housing groove 321b, the bottom of the housing groove 321b is correspondingly provided with a plurality of lower sealing drums 323a ON the outer side of the linkage bottom hole 1211, the plurality of lower sealing drums 323a are coaxially arranged and are in a ripple shape with gradually increased radius, a lower sealing groove 324b is formed between two adjacent lower sealing drums 323a, the lower sealing drums 323a and the lower sealing groove 324b are matched with the handle cover 320 ON the handle piece 300, the bottom of the housing groove 321b is correspondingly provided with a housing spring shaft 331 and a housing limiting hole 311c ON the outer side of the lower sealing drum 323a, the housing spring shaft 331 is provided with a counter force spring 330 connected with the handle cover 320 of the handle piece 300, the housing limiting hole 331c is matched with the limiting rod 311c of the limiting piece 310 ON the handle piece 300, a limiting convex rib 311e which is in sliding fit with the limiting rod 311c is arranged between the housing spring shaft 331 and the housing limiting hole 311c, the limiting convex rib 311e is in an arc shape corresponding to the movement track of the housing limiting rod 311c, the structural strength of the housing 120 can be improved, and the wear between the top wall 311c of the limiting rod 120 and the wear can be reduced;

The bottom side of the lateral wall of the housing 120 is provided with a housing sealing groove 123, a housing sealing ring 124 (fig. 28) matched with the cabinet door 4 of the switch cabinet is arranged in the housing sealing groove 123, the cross section of the housing sealing ring 124 is in a T shape (fig. 2), the tightness between the housing 120 and the cabinet door 4 of the switch cabinet can be improved, dust and water vapor are prevented from entering the shell, the connecting part of the lateral wall of the housing 120 is provided with an assembling boss 116b matched with the base 110, the assembling boss 116b is provided with a cabinet door threaded hole 116c, and the cabinet door threaded hole 116c enables the housing 120 and the cabinet door 4 to form fixed connection through a screw.

As shown in fig. 1, the coupling device 1 includes a connecting member 140 and a calibration member 150, one end of a coupling shaft 101 is coupled to the handle device 2, the other end is connected to the handle of the switching device 3 through the connecting member 140, and the calibration member 150 is disposed on one side of the coupling shaft 101 and is engaged with the middle of the coupling shaft 101.

Referring to fig. 32, the calibration member 150 includes a support plate 151 and a calibration arm 152 that are disposed perpendicular to each other, one end of the support plate 151 is connected to the housing of the switching device 3, the other end is connected to the calibration arm 152, the calibration arm 152 is provided with a support hole 153 that mates with the coupling shaft 101, and the coupling shaft 101 passes through the support hole 153 to be connected to the connecting member 140 on the switching device 3;

An adjusting hole 154 communicated with the bottom side of the supporting hole 153 is arranged at the bottom side of the supporting hole 153, an adjusting screw 155 matched with the bottom side of the connecting shaft 101 is arranged in the adjusting hole 154, the length extending into the adjusting hole 154 is adjusted by screwing the adjusting screw 155, and the middle part of the connecting shaft 101 is jacked up to compensate the position deviation of the connecting shaft 101 in the vertical direction, so that the connecting shaft 101 can be aligned with the handle device 2.

According to the external operating handle, the position of the connecting shaft 101 in the vertical direction is compensated through the calibration piece 150 provided with the adjusting screw 155, so that the connecting shaft 101 can be aligned with the handle device 2, the mounting difficulty is reduced, and the connecting shaft 101 is more reliable in transmission.

Further, the edges of the supporting hole 153 and the alignment arm 152 are respectively provided with a supporting boss 153a and an alignment boss 153a extending along the axial direction of the coupling shaft 101, the bottom of the supporting boss 153a is connected with the inner side of the alignment boss 153a, the contact area between the supporting boss 153a and the coupling shaft 101 is larger, and the structural strength and compensation effect of the supporting hole 153 can be improved.

Furthermore, the calibration arm 152 is provided with a plurality of support holes 153, the distance between the axes of two adjacent support holes 153 is equal to the thickness of the spliced additional module on the switching device 3, the additional module can be an under-voltage release or a shunt release, and after the additional module is spliced on the switching device 3, the connecting shaft 101 only needs to pass through the corresponding support hole 153, so that the structure is simple and the universality is strong.

Still further, be equipped with on the mounting plate 151 with the casing of switching apparatus 3 link to each other connecting plate 155, connecting plate 155 be with the side wall matched with shape of the casing of switching apparatus 3, like protruding font, be equipped with first buckle 1551a and the second buckle 1552a of being connected with the casing of switching apparatus 3 on connecting plate 155, be equipped with on the casing of switching apparatus 3 with first buckle 1551a and the corresponding first draw-in groove 1551b of second buckle 1552a respectively and second draw-in groove 1552b (fig. 36), mounting plate 151 links to each other with the casing of switching apparatus 3 through the mode of buckle, have simple structure, the characteristics of being convenient for loading and unloading.

Specifically, the number of the first clips 1551a is two, and the two first clips 1551a are oppositely arranged at two sides of the top end of the connecting plate 155, the two first clips 1551a are respectively protruded outwards, and the first clamping grooves 1551b are arranged at two sides of the wiring terminal of the switching device 3 and are matched with the first clips 1551 a; the number of the second clamping buckles 1552a is two, the two second clamping slots 1552b are arranged on two sides of the bottom end of the connecting plate 155 in parallel, the two sides of the wiring terminal of the switching device 3 are also matched with the second clamping buckles 1552a, and the second clamping slots 1552b are arranged below the first clamping slots 1551 b.

Referring to fig. 32, the support plate 151 is formed into a thin plate shape to reduce weight and avoid sinking, a reinforcing rib is disposed on the support plate 151 in a cross manner, a connection plate 155 connected with a casing of the switching device 3 is disposed on a bottom side of the support plate 151, the connection plate 155 is in a convex shape, a top side of the connection plate 155 is connected with the support plate 151, two ends of a top side of the connection plate 155 are respectively provided with a first buckle 1551a, two ends of a bottom side of the connection plate 155 are respectively provided with a second buckle 1552a, a top side of the support plate 151 is provided with a calibration arm 152 perpendicular to the coupling shaft 101, at least one supporting hole 153 is disposed on the calibration arm 152, an adjusting hole 154 communicated with the bottom side of the supporting hole 153 is disposed, and an adjusting screw 155 matched with the bottom side of the coupling shaft 101 is disposed in the adjusting hole 154.

As shown in fig. 30-31, the handle seat 141 and the connecting seat 142 are integrally formed with the connecting member 140, the handle seat 141 and the connecting seat 142 are respectively provided with a handle slot 143 and a connecting slot 144 on a side far away from each other, the handle slot 143 and the connecting slot 144 are respectively used for accommodating the handle and the connecting shaft 101 of the switching device 3, one sides of the handle slot 143 and the connecting slot 144 are respectively provided with a handle locking hole 145 and a connecting locking hole 146, screws are respectively arranged in the handle locking hole 145 and the connecting locking hole 146, one end of the connecting shaft 101 connected with the connecting member 140, namely, one end far away from the connecting key 101 is provided with a connecting threaded hole 103 corresponding to the connecting locking hole 146, and the handle and the connecting shaft 101 of the switching device 3 are fixed in the handle locking hole 145 and the connecting locking hole 146 by the screws.

Further, the handle seat 141 is in a rectangular parallelepiped shape, the connecting seat 142 is in a cylindrical shape, the top side of the connecting seat 142 is provided with a connecting groove 144, the connecting groove 144 is in a rectangle matched with the section of the connecting shaft 101, the bottom side of the connecting seat 142 is connected with the top side of the handle seat 141 through a middle plate 147 in a flat cylindrical shape, the left side of the connecting seat 142 is provided with a connecting locking boss 1461, the connecting locking boss 1461 is internally provided with a connecting locking hole 146, the periphery of the connecting locking boss 1461 is provided with a connecting reinforcing rib 1462 connected with the outer side of the connecting seat 142, and the connecting reinforcing rib 1462 is in a trapezoid shape; the top side of the handle seat 141 is connected with the middle plate 147, the bottom side is provided with a handle groove 143, the handle groove 143 is rectangular matched with the handle of the switching device 3, one side of the handle seat 141 is provided with a handle locking boss 1451, the inner side of the handle locking boss 1451 is provided with a handle locking hole 145, the outer side of the handle locking boss 1451 is provided with a handle reinforcing rib 1452 connected with the outer side of the handle seat 141, and the handle reinforcing rib 1452 is triangular or trapezoidal. The cross section of the coupling shaft 101 of the present invention is rectangular, but it is needless to say that the cross section of the coupling shaft 101 may be circular or have other shapes, and the shape of the coupling groove 144 of the coupling seat 142, the coupling shaft groove 411 of the coupling member 410, and the locking shaft hole 421 of the locking member 420 are matched with the cross section of the coupling shaft 101.

As a specific embodiment:

The external operating handle device comprises a housing 120, a handle piece 300, a limiting piece 310, a base 110, a threaded sleeve 130, a linkage piece 410, a locking piece 420, an unlocking piece 430, a T-shaped housing sealing ring 124, a locking spring 433, a limiting spring 312, a linkage sealing ring 417, an unlocking sealing ring 437, a limiting guide shaft 316a and the like, wherein the external operating handle device can drive a switching device 3 to switch between a closed (ON) position and an OFF (OFF) position so as to realize the operation of the switching device 3. The linkage member 410 passes through the linkage bottom hole 1211 of the housing 120 and is fixedly connected with the handle member 300 through the combination screw 415, the handle member 300 can be operated to drive the linkage member 410 to rotate around the central axis of the housing 120 together, namely, the curved surface on the outer side of the housing wall 321 of the handle housing 320 rotates around the curved surface on the outer side of the housing groove 321b of the housing 120, the top side of the linkage member 410 is provided with the linkage boss 414, the linkage boss 414 is provided with the linkage sealing ring 417, and when the handle member 300 and the linkage member 410 are screwed together through the combination screw 415 to form a connection, the linkage sealing ring 417 generates compression deformation to enhance the sealing effect of the connection part.

The limit boss 413d on the limit collar 413a at the bottom side of the linkage piece 410 is matched with the limit stop 413c in the limit stop groove 413b of the housing 120, and when the side surface of the limit boss 413d is contacted with the side surface of the limit stop 413c (fig. 8) at the right side, the external operation handle is in an off state; when the side surface of the limit boss 413d contacts with the side surface of the limit stop 413c (fig. 8) on the left side, the external operation handle is in the on state, that is, the rotation limit position of the linkage member 410 is limited by the limit stops 413c on the left and right sides of the housing 120, and the rotation limit position of the handle member 300 in the off and on states is further limited, and the angle between the right side surface of the limit stop 413c on the left side of the housing 120 and the left side surface of the limit stop 413c on the right side (fig. 8) is designed with a margin, which is greater than 90 °, so that the installation gap between the external handle and the switching device 3 can be compensated. The cover 120 is provided with a cover drain groove 325a in cooperation with the handle cover 320 at the bottom side of the handle member 300, and the handle cover 320 at the bottom side of the handle member 300 is provided with a handle drain groove 325b corresponding to the cover drain groove 325a, so that the drain of the external operation handle can be increased, and the waterproof effect of the whole handle device can be increased.

The limiting member 310 is provided with an upper spring shaft 312a for fixing the limiting spring 312, the other end of the limiting spring 312 is fixed by a lower spring shaft 312b of the handle member 300, the limiting member 310 can move up and down in the vertical direction in the handle member 300, the limiting member 310 is provided with a limiting rod 311, and when the cylindrical end surface at the bottom end of the limiting rod 311 moves into the limiting hole 311c of the housing 120 to contact with the bottom surface of the limiting hole 311, the external operating handle can be locked at the off position by one or more stopping members (such as a padlock) passing through the oval stopping hole 310c on the handle member 300. When the restriction member 310 moves vertically upward, the top side of the restriction member 310 is level with the top side of the restriction groove 310b of the handle member 300, the restriction arms 314b on both sides of the restriction member 310 are restricted by the restriction arms 314b on the handle member 300, and at the same time, the external operation handle locking function is disabled, and the handle member 300 can be rotated to the on position around the center of the housing 120; in order to prevent the handle member 300 from being inclined to one side when moving in the vertical direction, the limiting member 310 is guided and limited in the vertical direction by the cylindrical surface 141 of the end of the limiting guide shaft 316a being tangent to the sliding arm 315 on the limiting member 310. The periphery of the limiting guide shaft 316a is provided with a fixing rib 316f, the fixing rib 316f is in interference fit with a limiting guide through hole 316bb on the handle piece 300, a limiting guide blind hole 316b is arranged on the outer side of the limiting guide through hole 316bb, and the limiting guide blind hole 316b is in contact with a limiting guide head 316d of the limiting guide shaft 316a and used for limiting the limiting guide shaft 316 a.

The outer cylindrical surface of the unlocking member 430 passes through the locking sleeve 1212 of the housing 120 to be connected with the locking member 420, the locking spring 433 is a compression spring, one end of the locking spring is limited by the right side of the spring retainer 434 and the other end of the locking spring is limited by the spring ring 435 on the inner wall of the unlocking sleeve 1213 of the housing 120, the locking rod 432e of the unlocking member 430 is contacted with the avoiding hole 432c of the locking member 420, the locking plate 432d is contacted with the locking groove 432b, and the guide arm 423a of the locking member 420 is placed on the guide plate 423b of the housing 120 to move in a certain displacement along the horizontal direction (as shown in fig. 14). The spring retainer 434 of the unlocking member 430 is provided with an unlocking seal ring 437 at a side far from the locking spring 433, enhancing the sealing effect of the connection thereto.

Fig. 14 shows an emergency release device for a cabinet door, fig. 5 is a schematic structural view of the external operating handle device in an on state, and fig. 6 is a schematic structural view of the external operating handle device in an internal state when the cabinet door 4 needs to be opened in an emergency. The end surface of the unlocking member 430 is provided with a knife slot 4311 matched with a tool, so that when the switch 3 is in an on state and the cabinet door 4 needs to be opened in an emergency, the unlocking member 430 can be pressed by the tool (such as a screwdriver), the right end surface of the locking plate 432d of the unlocking member 430 is contacted with the right side wall (fig. 12) of the locking slot 432b of the locking member 420, the locking member 420 is pushed to move from fig. 5 to the position in fig. 6, namely, the locking key hole 422 of the locking member 420 and the linkage key slot 412 of the linkage member 410 are overlapped, the arc-shaped convex 210-shaped linkage key 102 (fig. 14) of the linkage shaft 101 can be separated from the linkage key slot 412 of the linkage member 410 and the locking key hole 422 of the locking member 420, the cabinet door 4 is opened, and when the unlocking member 430 withdraws pressure, the unlocking member 430 returns the unlocking member 430 and the locking member 420 to the position in fig. 5 by the reset force generated by the locking spring 433.

The housing screw hole 117c of the base 110 is fixedly connected with the four housing screw bosses 117d of the housing 120 by screws. The assembly groove 116 of the base 110 is matched with the assembly boss 116b of the cover 120, and has an error-proof installation function. The base 110 is provided with a base sleeve 111 matched with the thread bush 130, an external thread is arranged on the outer side of the base sleeve 111 and matched with an internal thread on the inner side of the thread bush 130, one end of the thread bush 130 is provided with a sleeve retainer ring 131, the sleeve retainer ring 131 is arc-shaped, the sleeve retainer ring 131 has a guiding function on the inside of an external operation handle device for guiding the connecting shaft 101, one side of the sleeve retainer ring 131 is provided with a holding arm 132, and the holding arm 132 increases the reliability and convenience of the installation of the handheld rotation thread bush 130 when the thread bush 130 is screwed. The mounting through hole 114 of the base 110 is led into the handle device corresponding to the coupling shaft 101 in the off state of the external operation handle device, and the release through hole 115 is led out from the handle device when the door 4 needs to be opened in an emergency corresponding to the coupling shaft 101 in the on state of the external operation handle device.

The T-shaped cover sealing ring 124 is matched with the cover sealing groove 123 of the cover 120, the cross section of the cover sealing groove 123 is U-shaped, and when the external operating handle device is installed on the cabinet door 4, the T-shaped cover sealing ring 124 is extruded and deformed by the panel of the cabinet door 4 and the cover 120, so that the sealing effect of the connection between the cabinet door 4 and the cover 120 is enhanced.

The external operating handle device has the following advantages:

a. the handle 300, the limiting member 310 and the handle housing 320 are simple in structure, few in parts and low in cost;

b. The linkage member 410 is designed with allowance corresponding to the off and on positions, so that the installation clearance between the external operation handle and the switching device 3 can be compensated;

c. The labyrinth seal structure, the T-shaped housing seal ring 124, the round unlocking seal ring 437 and the linkage seal ring 417 are adopted to ensure that the external operation of the invention achieves high dustproof and waterproof effects;

d. the cover 120 is provided with the cover drain groove 325a, which can effectively improve the waterproof effect.

Further, the coupling device 1 includes a coupling shaft 101, a connector 140, a bracket plate 151, and a threaded sleeve 130. One side of the connecting piece 140 is provided with a profiled connecting groove 144, the connecting groove 144 is connected with the connecting shaft 101, the other side is provided with a handle groove 143, the handle groove 143 is connected with a handle of the switching device 3, and the handle locking hole 145 is respectively in screw thread fastening connection with a screw thread in the connecting locking hole 146, so that the switching device 3 and the connecting shaft 101 do not have relative movement along the axial direction relative to the connecting piece 140. The other end of the coupling shaft 101 provided with the coupling key 102 is introduced into the inside of the housing along the screw bush 130 of the external operating handle to be coupled. The adjusting screw 155 on the adjusting bracket plate 151 compensates the sagging displacement of the coupling shaft 101 in the vertical direction, and integrally improves the guiding function of the coupling device 1 together with the threaded sleeve 130, so that the coupling shaft 101 can be smoothly guided into the threaded sleeve 130 for internal coupling. The holder plate 151 is provided with a first catch 1551a and a second catch 1552a, and the first catch 1551a and the second catch 1552a are respectively connected with a first catch groove 1551b and a second catch groove 1552b (which are in catch connection) on the switching device 3.

In the switching device 3 having the coupling device of the present patent, the switching device 3 may be installed in a power distribution cabinet or a control cabinet, the handle device 2 may be installed on a cabinet door 4, and a person transmits force to the coupling device 1 by operating the handle device 2, thereby driving the switching device 3 to perform a circuit connection/disconnection operation. The external operating handle of the invention has the following characteristics:

a. The structure is simple, the parts are few, and the cost is low;

b. the calibration arm 152 of the coupling device 1 has a fine adjustment function in the vertical direction, so that the coupling shaft 101 is centered with the threaded sleeve 130, and the coupling device is convenient and practical;

c. the screw bush 130 has a guide centering function for the coupling shaft 101.

The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.

Claims

1. The utility model provides an external operating handle, includes coupling axle (101) of being connected with switching apparatus (3) to and link (410) of being connected with coupling axle (101), link (410) set up in the casing, be equipped with handle piece (300) of being connected with link (410) in the top side of casing, handle piece (300) drive coupling axle (101) through link (410) around the axis rotation of coupling axle (101), its characterized in that: a linkage shaft groove (411) which is in sliding fit with the linkage shaft (101) is formed in the bottom side of the linkage member (410), a linkage key groove (412) which is in sliding fit with a linkage key (102) on the linkage shaft (101) is formed in the linkage shaft groove (411), a movable locking member (420) and an unlocking member (430) which is connected with the locking member (420) are arranged below the linkage member (410), a locking shaft hole (421) which corresponds to the linkage shaft groove (411) is formed in the locking member (420), a locking key hole (422) which corresponds to the linkage key groove (412) is formed in the locking shaft hole (421), the linkage shaft (101) penetrates through the locking member (420) to extend into the linkage member (410), the unlocking member (430) can drive the locking member (420) to move so that the locking key hole (422) is dislocated and overlapped with the linkage key groove (412), when the locking key hole (422) is dislocated with the key groove (412), the locking member (420) is abutted against the bottom side of the linkage key (102), the linkage shaft (101) is locked with the linkage member (410), and when the locking key hole (422) is coincident with the linkage key groove (412), and the linkage shaft (101) can be freely locked through the linkage key groove (412); the connecting key (102) is provided with a pushing surface (104) matched with the locking piece (420), when the connecting shaft (101) rotates to the OFF position, the pushing surface (104) can push the locking piece (420) to move along the moving direction of the unlocking piece (430), the locking effect on the connecting shaft (101) is relieved, and the moving direction of the unlocking piece (430) is arranged corresponding to the OFF position.

2. The external operating handle according to claim 1, wherein: the unlocking piece (430) is provided with an unlocking head (431) at one end far away from the locking piece (420), the locking spring (433) can drive the unlocking piece (430) to drive the locking piece (420) to move towards the direction of the locking connecting shaft (101), and the locking piece (420) can unlock the connecting shaft (101) by overcoming the action of the locking spring (433) through pressing the unlocking head (431).

3. The external operating handle according to claim 1, wherein: a cylindrical locking sleeve (1212) and an unlocking sleeve (1213) which is communicated between the side wall of the shell and the locking sleeve (1212) are arranged in the shell, the locking piece (420) is arranged on the inner side of the locking sleeve (1212), and the unlocking piece (430) is arranged on the inner side of the unlocking sleeve (1313); the inner side of the locking sleeve (1212) is correspondingly provided with two guide plates (423 b) which are oppositely arranged at the two sides of the locking piece (420), and the two sides of the locking piece (420) are respectively provided with guide arms (423 a) which are in sliding fit with the guide plates (423 b).

4. The external operating handle according to claim 1, wherein: the locking piece (420) is provided with a locking groove (432 b) matched with the unlocking piece (430), one end of the unlocking piece (430) is provided with a locking head (432 a) matched with the locking groove (432 b), the locking head (432 a) comprises a locking plate (432 d) and a locking rod (432 e) connected between the locking plate (432 d) and the unlocking piece (430), the locking plate (432 d) is clamped into the locking groove (432 b), and an avoidance hole (432 c) matched with the locking rod (432 e) is formed in the top side of the locking groove (432 b).

5. The external operating handle according to claim 1, wherein: the unlocking piece (430) is provided with an unlocking head (431) at one end far away from the locking piece (420), a spring retainer ring (434) is arranged between the unlocking head (431) and the spring retainer ring (434), an unlocking sealing ring (437) is arranged between the unlocking head (431) and the spring retainer ring (434), and a locking spring (433) connected with the shell is arranged at the other side of the spring retainer ring (434).

6. The external operating handle according to claim 1, wherein: the shell is provided with a linkage bottom hole (1211) matched with the linkage piece (410), an annular limit blocking groove (413 b) is formed in the edge of the linkage bottom hole (1211), and a limit check ring (413 a) in sliding fit with the limit blocking groove (413 b) is arranged on the bottom side of the linkage piece (410); the groove wall of the limit stop groove (413 b) is provided with limit stops (413 c) corresponding to the closed position and the open position respectively, the side surface of the limit stop ring (413 a) is provided with limit bosses (413 d) matched with the limit stops (413 c), and the included angle between the two limit stops (413 c) and the connecting line of the axis of the connecting shaft (101) is larger than 90 degrees.

7. The external operating handle according to claim 1, wherein: a counter-force spring (330) is arranged between the handle piece (300) and the shell, two ends of the counter-force spring (330) are respectively connected with the handle piece (300) and the shell, and the acting force of the counter-force spring (330) is the same as the direction of rotation of the handle piece (300) to the closing position.

8. The external operating handle according to claim 1, wherein: a handle cover (320) matched with the shell is arranged at the bottom side of the handle piece (300), a limiting groove (310 b) is formed in the inner side of the handle piece (300), a limiting piece (310) capable of moving along the axial direction of the connecting shaft (101) is arranged in the limiting groove (310 b), a limiting spring (312) is arranged between the limiting piece (310) and the handle cover (320), and a stop hole (310 c) matched with the limiting piece (310) is formed in the side wall of the limiting groove (310 b); a limiting rod (311) is arranged at the bottom side of the limiting piece (310), a handle limiting hole (311 b) matched with the limiting rod (311) is arranged on the handle cover (320), and a housing limiting hole (311 c) matched with the limiting rod (311) is arranged on the housing.

9. The external operating handle according to any one of claims 1-8, wherein: the unlocking piece (430) is cylindrical, the unlocking piece comprises an unlocking head (431) arranged at the left end and a locking head (432 a) arranged at the right end, the locking head (432 a) comprises a locking plate (432 d) and a locking rod (432 e) connected between the locking plate (432 d) and the unlocking piece (430), a spring retainer (434) is arranged at the right side of the unlocking head (431) at intervals, an annular unlocking seal groove (436) is formed between the left side of the spring retainer (434) and the unlocking head (431), an unlocking seal ring (437) matched with a shell is arranged in the unlocking seal groove (436), a locking spring (433) is arranged on the right side of the spring retainer (434), the left end of the locking spring (433) is sleeved on the unlocking piece (430) to be abutted against the right side of the spring retainer (434), and the right end of the locking spring retainer (435) is abutted against a spring ring table (435) on the inner wall of the unlocking sleeve (1213).

10. The external operating handle according to any one of claims 2-8, wherein: the locking piece (420) is in a flat cylindrical shape, two guide arms (423 a) which are oppositely arranged are arranged at the upper end and the lower end of the locking piece (420), the thickness of the guide arms (423 a) is smaller than that of the locking piece (420), a guide groove (423 c) is formed at the top side of the locking piece (420), a locking shaft hole (421) matched with the connecting shaft (101) is formed in the middle part of the locking piece (420), a locking key hole (422) matched with the connecting key (102) on the connecting shaft (101) is formed in the bottom side hole wall of the locking shaft hole (421), a locking groove (432 b) connected with the unlocking piece (430) is formed in the left side of the locking piece (420), and a avoiding hole (432 c) matched with the unlocking piece (430) is formed in the left side groove wall of the locking groove (432 b); the connecting key (102) is hemispherical, an arc-shaped pushing surface (104) is arranged at the bottom side of the connecting key (102), an arc-shaped leading-in surface (105) is arranged at the top side of the connecting key (102), the pushing surface (104) can push the locking piece (420) along the radial direction of the connecting shaft (101), the locking piece (420) can only correspondingly move along the moving direction of the unlocking piece (430), and the moving direction of the unlocking piece (430) is correspondingly arranged with the OFF (OFF) position.

11. The external operating handle according to any one of claims 1-8, wherein: the linkage piece (410) is in a cuboid shape, cambered surfaces are arranged on the left side and the right side of the linkage piece (410), a linkage groove (410 b) matched with the linkage piece (410) is formed in the bottom side of the handle piece (300), a linkage boss (414) is arranged on the top side of the linkage piece (410), the linkage boss (414) is fixedly connected with the handle piece (300), a linkage shaft groove (411) matched with the linkage shaft (101) is formed in the bottom side of the linkage piece (410), a linkage key groove (412) matched with a linkage key (102) on the linkage shaft (101) is formed in the wall of the left side of the linkage shaft groove (411), a limit check ring (413 a) matched with a shell is arranged on the periphery of the bottom side of the linkage piece (410), and a limit boss (413 d) protruding along the radial direction is arranged on the left side of the limit check ring (413 a).

12. The external operating handle according to any one of claims 1-8, wherein: the shell comprises a base (110) and a housing (120), a thread bush (130) is arranged at the bottom side of the base (110), the base (110) is in a flat plate shape, a base sleeve (111) matched with the thread bush (130) is arranged in the middle of the bottom side, external threads are arranged on the outer side of the base sleeve (111), a fixing piece (112) is arranged on the inner side of the base sleeve (111), a fixing through hole (113) matched with a connecting shaft (101) is arranged on the fixing piece (112), the cross section of the connecting shaft (101) is rectangular, the cross section of the fixing through hole (113) is circular, a mounting through hole (114) and a release through hole (115) are formed in the hole wall of the fixing through hole (113), and the mounting through hole (114) and the release through hole (115) are respectively matched with the connecting keys (102) corresponding to the closing and opening positions; four vertex angle positions of the base (110) are provided with assembly grooves (116), and the bottom side of the housing (120) is provided with assembly bosses (116 b) corresponding to the assembly grooves (116); the threaded sleeve (130) is cylindrical, an inner thread matched with an outer thread on the base sleeve (111) is arranged on the inner side of the threaded sleeve (130), a sleeve retainer ring (131) is arranged at one end of the threaded sleeve (130), the sleeve retainer ring (131) is in a cambered surface shape, and a holding arm (132) is arranged on one side of the sleeve retainer ring (131).

13. The external operating handle according to any one of claims 1-8, wherein: the bottom side of the handle piece (300) is provided with a handle cover (320) matched with the shell, the inner side of the handle piece (300) is provided with a limiting groove (310 b), and the limiting groove (310 b) is provided with a limiting piece (310) capable of moving along the axial direction of the connecting shaft (101); The handle cover (320) comprises a cylindrical cover wall (321) and a cover plate (322) arranged on the top side of the cover wall (321) and connected with the bottom side of the handle piece (300), wherein the cover plate (322) is in an upward protruding cambered surface shape, the cover plate (322) forms the bottom of the limiting groove (310 b), a handle boss (410 c) is arranged on the top side of the cover plate (322) at the bottom position corresponding to the limiting groove (310 b), lower spring shafts (312 b) are arranged on two sides of the handle boss (410 c), limiting springs (312) connected with the limiting piece (310) are arranged on the lower spring shafts (312 b), a linkage groove (410 b) matched with the linkage piece (410) is arranged on the inner side of the handle boss (410 c), The linkage groove (410 b) is communicated with the bottom side of the cover plate (322), a handle spring shaft (332) and a handle limiting hole (311 b) are arranged at the bottom side of the cover plate (322), the handle spring shaft (332) and the handle limiting hole (311 b) are oppositely arranged at two sides, a counter force spring (330) connected with the shell is arranged on the handle spring shaft (332), and the handle limiting hole (311 b) is matched with a limiting rod (311) on the limiting piece (310); The handle member (300) includes two oppositely disposed handle cheeks (318 a), one end of the left side of the two handle cheeks (318 a) is connected through a handle short plate (318 b), the other end of the right side is connected through a handle long plate (318 c), the two handle cheeks (318 a), the handle short plate (318 b) and the handle long plate (318 c) enclose a limiting groove (310 b), a stop hole (310 c) is arranged on the top side of one handle cheeks (318 a), the height of the handle short plate (318 b) is smaller than that of the handle long plate (318 c), the height of the handle long plate (318 c) is the same as that of the handle cheeks (318 a), The handle cheek plate (318 a) and the handle short plate (318 b) are connected with each other, one end of the handle cheek plate is provided with an avoidance notch (313 b), the top side of the avoidance notch (313 b) is provided with a stop arm (314) matched with the limiting piece (310), the handle long plate (318 c) is provided with a limiting guide through hole (316 bb), and the limiting guide through hole (316 bb) is internally provided with a limiting guide shaft (316 a) matched with the limiting piece (310); The limiting guide shaft (316 a) comprises a limiting guide head (316 d) and a limiting guide rod (316 e), one end of the limiting guide rod (316 e) is connected with the limiting guide head (316 d), the other end of the limiting guide rod extends into the limiting guide groove (316 c) to be matched with the limiting guide head, and a fixing rib (316 f) in interference fit with the limiting guide through hole (316 bb) is arranged on the outer side of the limiting guide rod (316 e); The top side of the right end of the limiting piece (310) is provided with a limiting arm (313) matched with the handle piece (300), the bottom side of the limiting arm (313) is provided with a limiting arm (314 b) matched with the handle piece (300), the bottom side of the right end of the limiting piece (310) is provided with a limiting rod (311) matched with the handle cover (320) and the cover (120), the bottom side of the left end of the limiting piece (310) is provided with a sliding arm (315) in sliding fit with the limiting groove (310 b), the left side wall of the sliding arm (315) is provided with a limiting guide groove (316 c), the bottom side of the limiting piece (310) is correspondingly provided with an upper spring shaft (312 a) between the sliding arm (315) and the limiting rod (311), the upper spring shaft (312 a) is provided with a limiting spring (312) connected with the handle cover (320).

14. The external operating handle according to any one of claims 1-8, wherein: the cover (120) of the shell comprises four side walls which are sequentially connected and a top wall which is connected to the top side of the side walls, a cover boss (122) is arranged on the bottom side of the top wall of the cover (120), a cover groove (321 b) is formed in the top side of the top wall of the cover (120) corresponding to the cover boss (122), and the cover boss (122) is a flat cylinder; the middle part of the top wall of the housing (120) is provided with a linkage bottom hole (1211) matched with the linkage piece (410), the top side of the linkage bottom hole (1211) is communicated with the bottom of the housing groove (321 b), the bottom side of the linkage bottom hole (1211) is communicated with the bottom side of the housing boss (122), the bottom side of the housing boss (122) is correspondingly provided with a limit stop groove (413 b) at the outer side of the linkage bottom hole (1211), the limit stop groove (413 b) is matched with a limit check ring (413 a) at the bottom side of the linkage piece (410), the side wall of the limit stop groove (413 b) is provided with a limit stop (413 c) in limit fit with the limit check ring (413 a), the bottom side of the housing boss (122) is correspondingly provided with a cylindrical locking sleeve (1212) at the outer side of the limit stop groove (413 b), the inner side of the locking sleeve (1212) is provided with a locking piece (420), the inner side of the locking sleeve (1212) is provided with two guide plates (423 b) matched with the locking piece (420), the guide plates (423 b) are oppositely arranged at the two sides of the locking piece (420), the left side and the right side of the locking sleeve (1212) is provided with the unlocking sleeve (1213) and the unlocking sleeve (430) at the two ends (1213) are respectively connected with the unlocking sleeve (430), the limiting boss (311 d) is also connected with the locking sleeve (1212), and a housing limiting hole (311 c) matched with a limiting rod (311 c) of a limiting piece (310) on the handle piece (300) is arranged on the top wall of the housing (120) correspondingly to the top side of the limiting boss (311 d); the bottom of the cover groove (321 b) is provided with a cover spring shaft (331) and a cover limiting hole (311 c), the cover spring shaft (331) is provided with a counter force spring (330) connected with a handle cover (320) of the handle piece (300), the cover limiting hole (331 c) is matched with a limiting rod (311 c) of a limiting piece (310) on the handle piece (300), and a limiting convex rib (311 e) which is in sliding fit with the limiting rod (311 c) is arranged between the cover spring shaft (331) and the cover limiting hole (311 c).