CN215069784U - Interlock and cubical switchboard - Google Patents
Interlock and cubical switchboard Download PDFInfo
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- CN215069784U CN215069784U CN202121143151.4U CN202121143151U CN215069784U CN 215069784 U CN215069784 U CN 215069784U CN 202121143151 U CN202121143151 U CN 202121143151U CN 215069784 U CN215069784 U CN 215069784U
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Abstract
The utility model relates to an interlocking device and a switch cabinet, wherein the interlocking device is arranged on the switch cabinet and comprises a mechanical lock and a locking device, the locking device comprises a mounting seat and a locking piece, and the locking piece is arranged on the mounting seat; the locking member has a first state and a second state; when the mechanical lock is in a first state, the locking piece can lock the valve of the grounding switch at a closed position, and the locking piece can release the bolt of the mechanical lock; when the second state, the locking piece can release earthing switch's valve, and the spring bolt that the locking piece can lock mechanical lock. The utility model discloses when earthing switch is in the separating brake state, even probably manual maloperation removes the valve to the low level, nevertheless because of the valve is at the removal in-process, reset spring can produce the pulling force promptly, and the unable stable stop of valve is in the low level, therefore the locking piece can't be with the valve locking, consequently, the spring bolt of mechanical lock can be in the locking state, and the key can not be extracted, can prevent that the cabinet door of the electrified load in low reaches from opening the risk that leads to the electric shock with electricity.
Description
Technical Field
The utility model relates to an interlock technical field especially relates to an interlock and cubical switchboard.
Background
The prior art switchgear comprises: cabinet body, earthing switch, interlock and key. The key is used to open the downstream equipment of the switchgear. A mechanical lock can be mounted on the switchgear cabinet of the downstream equipment, which can be opened with the key. If the downstream equipment is opened by the key when the grounding switch is opened, the downstream equipment is electrified to be opened, and the risk of electric shock is caused. Therefore, it is necessary to interlock the key and the earthing switch by an interlock device. Through interlocking, when the grounding switch is opened, the key can be locked, so that downstream equipment cannot be opened; when earthing switch closes a floodgate, the key can not locked to the downstream equipment can be opened to the key, because earthing switch closes a floodgate, consequently, even the key opens downstream equipment, can not lead to the risk of electrocuteeing yet.
Referring to fig. 1 and 2, a prior art interlock device includes a mechanical lock 400 and a latching device. The mechanical lock 400 is used to lock a key or release a key. The latching device includes a mounting bracket 820 and a connector 800. The operation shaft of the ground switch can be linked with the shutter 300, and the shutter 300 extends to the surface of the cabinet. The locking device is installed on the cabinet at the position of the shutter 300. The mechanical lock 400 is provided at one side of the shutter 300. The shutter 300 is connected to the connector 800, and the right side of the connector 800 can slide up and down along the mounting bracket 820 through the inner bolt 810. The left side of the connecting member 800 is provided with a left side plate 830, and the left side plate 830 is provided with a long hole 831 through which the bolt 410 of the mechanical lock 400 can pass. When the grounding switch is switched on (the state shown in fig. 2), the shutter 300 is in the low position after being actuated by the linkage mechanism in the cabinet, the long hole 831 on the left side plate 830 of the connecting piece 800 is opposite to the locking tongue 410 of the mechanical lock 400, at this time, the locking tongue 410 can pass through the long hole 831, and the mechanical lock 400 can release the key, so that the key 450 can be pulled out to open the downstream equipment; when the grounding switch is opened, the shutter 300 is in the high position (the state of fig. 1), and the connecting member 800 moves upward along with the shutter 300, the long hole 831 on the left side plate 830 of the connecting member 800 is not aligned with the locking tongue 410 of the mechanical lock 400, so that the locking tongue 450 cannot extend, and the mechanical lock 400 locks the key 450, and the key 450 cannot be pulled out.
However, in the case that the earthing switch is not operated, the shutter 300 can be moved up and down by manually moving the shutter 300 (when the shutter 300 is operated manually, a certain pulling force is generated on the shutter 300 by the return spring), so in the prior art, when the earthing switch is in the opening position, as shown in fig. 1, the shutter 300 may be pressed down to the state shown in fig. 2 by a manual misoperation (but the earthing switch inside the cabinet is still in the opening position). Because the valve 300 is pressed down to the low position by misoperation, the bolt of the mechanical lock 400 can be manually extended out at the same time, and the key 450 of the mechanical lock 400 can be pulled out, so that when the grounding switch is not switched on, the cabinet door of the downstream electrified load is electrified to be opened, and the risk of electric shock is caused.
SUMMERY OF THE UTILITY MODEL
Therefore, it is necessary to provide an interlock device and a switch cabinet to solve the problem of electric shock risk caused by manual misoperation.
An interlock arrangement comprising a mechanical lock and a blocking arrangement;
the mechanical lock comprises a lock body, a lock cylinder and a lock tongue, wherein the lock cylinder is arranged in the lock body, the lock tongue is arranged in the lock body, and the lock tongue can be driven to extend or retract relative to the lock body by inserting a key into the lock cylinder and rotating the key;
the locking device comprises a mounting seat and a locking piece, and the locking piece is mounted on the mounting seat; the locking member has a first state and a second state;
when the mechanical lock is in a first state, the locking piece can lock the valve of the grounding switch at a closed position, and the locking piece can release the bolt of the mechanical lock;
when the mechanical lock is in a second state, the locking piece can release the valve of the grounding switch, and the locking piece can lock the bolt of the mechanical lock.
In one embodiment, the locking member is provided with a limiting groove, and in the first state, the valve of the earthing switch is matched with the limiting groove to lock the earthing switch at the closed position.
In one embodiment, the locking member is hinged to the mounting base, the locking member having a first angle and a second angle relative to the mounting base;
when the mechanical lock is at a first angle, the locking piece is arranged in parallel with the mounting seat, a gap is formed between one end, close to the bolt, of the locking piece and the mounting seat, and the bolt of the mechanical lock can penetrate through the gap;
when the mechanical lock is at a second angle, the locking piece is opened relative to the mounting seat, a gap between one end, close to the lock tongue, of the locking piece and the mounting seat is reduced, and the locking piece limits the lock tongue of the mechanical lock.
In one embodiment, the locking piece comprises a first locking part and a second locking part, the first locking part is positioned on one side of the second locking part close to the bolt, the connecting part of the first locking part and the second locking part is provided with lugs extending towards two sides, and the locking piece is hinged with the mounting seat through the lugs;
a gap is formed between the first locking part and the mounting seat;
and the second locking part is provided with a limiting groove, and the limiting groove is matched with a valve of the grounding switch at a first angle.
In one embodiment, the width of the first locking portion is less than the width of the gap between the first locking portion and the mount at a first angle.
In one embodiment, in the first state, the valve of the grounding switch penetrates through the limiting groove, and the single-side gap between the valve and the limiting groove is 1mm-5 mm.
In one embodiment, a stopper block for stopping the latch bolt is disposed on the first locking portion.
In one embodiment, the shape of the stop block is a semi-cylinder, the plane of the semi-cylinder is attached to the first locking portion, and the arc-shaped surface of the semi-cylinder is used for stopping the lock tongue.
In one embodiment, the second locking portion is provided with a flange facing the mounting seat.
In one embodiment, the interlocking device is included, and the mounting seat is fixed on the outer surface of the cabinet body.
Foretell interlock and cubical switchboard, interlock sets up on the cubical switchboard, interlock includes mechanical lock and blocking device, blocking device includes mount pad and locking piece, when the cubical switchboard of low reaches equipment needs to be opened, can make earthing switch be in the combined floodgate state, then the valve is in the low level, make the locking piece be in the first state this moment, thereby the locking piece locks the valve at the low level, and simultaneously, the locking piece does not lock the spring bolt of the mechanical lock on the middling pressure cabinet, the spring bolt is in free state, through the key that rotates the mechanical lock, make the spring bolt stretch out outside the lock body, can extract the key, thereby the key can be used for opening the cubical switchboard of low reaches equipment.
When the locking piece is in the second state, the locking piece does not lock the valve, namely the valve is in a free state, so that the valve can be driven to move to a high position by the grounding switch by separating the grounding switch; at this moment, the spring bolt of the mechanical lock on the counter voltage cabinet is locked to the locking piece, and the spring bolt can not stretch out outside the lock body completely, and the key can not rotate and extract, consequently when earthing switch separating brake state, can guarantee that the cubical switchboard of low reaches equipment can not be opened to can prevent that the electrified risk that leads to the electric shock of opening of cabinet door that loads is electrified in low reaches.
When the grounding switch is in the opening state, even though the valve may be moved to the low position by mistake, the reset spring generates a pulling force during the movement of the valve, the valve cannot stably stay at the low position, and therefore the locking piece cannot lock the valve, so that the locking piece can be reliably in the second state, and further the locking piece can reliably lock the latch bolt. Therefore, the spring bolt of mechanical lock can be in the locking state, and the key can not be extracted, can prevent that the electrified risk that leads to the electric shock of opening of the electrified cabinet door of low reaches load.
Drawings
FIG. 1 is a schematic structural diagram of a locking device during opening of a grounding switch in the prior art;
fig. 2 is a schematic structural diagram of a locking device when a grounding switch is switched on in the prior art;
fig. 3 is a schematic structural view of the locking device when the grounding switch is opened according to the present invention;
fig. 4 is a schematic structural diagram of the locking device when the grounding switch is switched on;
reference numerals: 100-a mounting seat; 110-a cavity;
200-a locking element; 210-a limiting groove; 220-a first locking portion; 230-a second locking portion; 240-ear; 250-a stop block; 260-flanging;
300-a shutter;
400-a mechanical lock; 410-a locking tongue; 450-a key;
800-a connector; 810-bolt; 820-a mounting bracket; 830-left side panel; 831-long hole;
Detailed Description
In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Further, the first feature "on," "above" and "beneath" the second feature may mean that the first feature is directly or obliquely higher than the second feature, or simply that the first feature is at a higher level than the second feature. A first feature "under," "lower than," and "beneath" a second feature may mean that the first feature is directly or obliquely lower than the second feature, or simply that the first feature is at a lesser level than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 3 and 4, an embodiment of the present invention provides a switch cabinet. The switch cabinet comprises a cabinet body (not shown), a grounding switch (not shown), an interlocking device and a key 450. And a grounding switch is arranged in the switch cabinet. The interlock includes a lockout device and a mechanical lock 400. The locking device and mechanical lock 400 are disposed outside the cabinet. The locking device is adapted to cooperate with the mechanical lock 400 and the earthing switch, respectively.
The valve 300 of the grounding switch is connected with the operating shaft of the grounding switch, the valve 300 can be driven to move up and down when the grounding switch is opened and closed, and the valve 300 is in a high position when the grounding switch is opened; when the ground switch is closed, the shutter 300 is at a low position.
The mechanical lock 400 includes a lock body (not shown), a lock cylinder (not shown), and a latch 410, wherein a key 450 is inserted into the lock cylinder to rotate, and can drive the latch 410 to move back and forth in a first direction, wherein the first direction is a horizontal direction. When the key 450 is turned so that the bolt 410 is fully extended out of the lock body, the key 450 can be withdrawn; the key 450 cannot be withdrawn when the locking bolt 410 cannot be fully extended out of the lock body, i.e., is blocked within the lock body, or the locking bolt 410 cannot be fully extended out of the lock body.
The locking device includes a mounting seat 100 and a locking member 200. A locking member 200 mounted on the mounting seat 100; the lock 200 has a first state and a second state; in a first state, referring to fig. 4, the locking member 200 can lock the shutter 300 of the earthing switch in the closed position, and the locking member 200 can release the latch 410 of the mechanical lock 400; in a second state, referring to fig. 3, the locking member 200 can release the shutter 300 of the earthing switch, and the locking member 200 can lock the latch 410 of the mechanical lock 400.
Specifically, the mounting seat 100 is provided with a cavity 110 for the shutter 300 to reciprocate. When the switch cabinet of the downstream equipment needs to be opened, the grounding switch can be in a closing state, the shutter 300 is in a low position, the locking piece 200 is in a first state at the moment, so that the locking piece 200 locks the shutter 300 in the low position, meanwhile, the locking piece 200 does not lock the lock tongue 410 of the mechanical lock 400 on the medium voltage cabinet, the lock tongue 410 is in a free state, the lock tongue 410 extends out of the lock body by rotating the key 450 on the mechanical lock 400, the key 450 can be pulled out, and the key 450 can be used for opening the switch cabinet of the downstream equipment.
When the locking member 200 is in the second state, the locking member 200 does not lock the shutter 300, that is, the shutter 300 is in the free state, so that the shutter 300 can be moved to the high position by the grounding switch by opening the grounding switch; at this moment, the locking piece 200 locks the lock tongue 410 of the mechanical lock 400 on the medium voltage cabinet, the lock tongue 410 cannot be completely extended out of the lock body, and the key 450 cannot be pulled out in a rotating manner, so that when the grounding switch is in a switching-off state, the switch cabinet of downstream equipment cannot be opened, and the risk of electric shock caused by the fact that the cabinet door of the downstream electrified load is electrified to be opened can be prevented.
When the earthing switch is in the open state, even though the shutter 300 may be moved to the low position by mistake, the reset spring generates a pulling force during the movement of the shutter 300, the shutter 300 cannot be stably stopped at the low position, and therefore the locking member 200 cannot lock the shutter 300, so that the locking member 200 can be reliably in the second state, and the locking member 200 can reliably lock the latch 410. Therefore, the bolt 410 of the mechanical lock 400 can be in a locked state, the key 450 cannot be pulled out, and the risk of electric shock caused by the fact that the cabinet door of a downstream electrified load is electrified to be opened can be prevented.
In some embodiments, the locking member 200 is provided with a limiting groove 210, and in the first state, the shutter 300 of the earthing switch is engaged with the limiting groove 210 to lock the earthing switch in the closed position.
Specifically, in the first state, the shutter 300 of the ground switch is limited by passing through the limiting groove 210, and when the shutter 300 passes through the limiting groove 210, a single-side gap between the shutter 300 and the limiting groove 210 is preferably 1mm to 5 mm. If the reserved single-side gap is too small (smaller than 1mm), the valve 300 and the limiting groove 210 are easily clamped, so that the locking piece 200 is difficult to open or close; if the reserved single-side gap is too large (larger than 5mm), the valve 300 has a certain moving space in the limiting groove 210, and the limiting effect cannot be realized.
In some embodiments, the locking member 200 is hingedly coupled to the mounting base 100, and the locking member 200 has a first angle and a second angle with respect to the mounting base 100. Specifically, the locking member 200 is in a flip-top shape, the mechanical lock 400 is located at one side of the locking device, and the protruding direction of the latch 410 of the mechanical lock 400 is toward the locking device. A gap is formed between one end of the locking member 200 adjacent to the latch 410 and the mounting seat 100. Referring to fig. 4, at the first angle, the locking element 200 is disposed parallel to the mounting base 100, that is, the locking element 200 is buckled on the mounting base 100. The locking tongue 410 of the mechanical lock 400 can pass through a gap between one end of the locking piece 200 close to the locking tongue 410 and the mounting seat 100; in the second angle, the locking element 200 is opened relative to the mounting seat 100, that is, the locking element 200 is disposed non-parallel to the mounting seat 100, a gap between one end of the locking element 200 close to the latch tongue 410 and the mounting seat 100 is reduced, and the latch tongue 410 cannot pass through between the locking element 200 and the mounting seat 100, that is, the locking element 200 limits the latch tongue 410 of the mechanical lock 400.
Further, the locking member 200 includes a first locking portion 220 and a second locking portion 230. The first locking portion 220 and the second locking portion 230 are fixedly connected and extend in the same direction. The first locking part 220 is located at a side of the second locking part 230 close to the latch tongue 410. The surface of the first locking portion 220 facing away from the mounting seat 100 and the surface of the second locking portion 230 facing away from the mounting seat 100 are located on the same plane, the connecting portion of the first locking portion 220 and the second locking portion 230 is provided with an ear portion 240 extending towards two sides, and the locking member 200 is hinged to the mounting seat 100 through the ear portion 240.
Specifically, the limiting groove 210 is disposed on the second locking portion 230 and located at a position near the bottom edge of the second locking portion 230, and when the grounding switch is turned on and the locking member 200 is covered on the mounting base 100 (when the locking member 200 is at the first angle), the position of the limiting groove 210 corresponds to the position of the shutter 300. At this time, the first locking portion 220 is disposed in parallel with the mount 100. The gap between the end of the locking member 200 close to the latch 410 and the mounting seat 100 is the gap between the first locking portion 220 and the mounting seat 100.
The first locking portion 220 is used for locking the latch 410 of the mechanical lock 400, when the earthing switch is opened, the locking member 200 is in an open state (when the locking member 200 is at the second angle) compared with the mounting seat 100, that is, the first locking portion 220 rotates along the hinged ear 240, the distance between the locking member 200 at the hinged position and the mounting seat 100 is reduced, that is, the gap between the first locking portion 220 and the mounting seat 100 is reduced, so that the first locking portion 220 limits the latch 410.
To facilitate the rotation of the locking member 200, the width of the first locking portion 220 is smaller than the gap between the locking member 200 and the mounting seat 100 at the first angle.
In some embodiments, a stopper block 250 for stopping the latch 410 is disposed on the first locking portion 220. Specifically, the surface of the stopping block 250 for stopping the latch 410 is an arc-shaped surface, which can prevent the first locking portion 220 from interfering with the mechanical lock 400 during rotation, and preferably, the stopping block 250 is shaped like a semi-cylinder, and the plane of the semi-cylinder is attached to the first locking portion 220.
In some embodiments, the second locking portion 230 is provided with a flange 260 facing the mounting seat 100. The second locking portion 230 has four sides, one of the four sides is fixedly connected to the first locking portion 220, and the other three sides are provided with flanges 260. When the locking member 200 is at the first angle, the locking member 200 is disposed parallel to the mounting seat 100, because the flange 260 is disposed, on one hand, the locking member 200 can be supported on the mounting seat 100, so as to ensure that the first locking portion 220 and the mounting seat 100 have a sufficient distance to allow the latch 410 to pass through when the locking member 200 covers the mounting seat 100; conveniently, when the locking member 200 is at the first angle, the locking member 200 and the mounting seat 100 wrap the shutter 300 therein, so as to protect the shutter 300.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (10)
1. An interlock device, characterized in that said interlock device comprises a mechanical lock and a blocking device;
the mechanical lock comprises a lock body, a lock cylinder and a lock tongue, wherein the lock cylinder is arranged in the lock body, the lock tongue is arranged in the lock body, and the lock tongue can be driven to extend or retract relative to the lock body by inserting a key into the lock cylinder and rotating the key;
the locking device comprises a mounting seat and a locking piece, and the locking piece is mounted on the mounting seat; the locking member has a first state and a second state;
when the grounding switch is in a first state, the locking piece can lock the valve of the grounding switch at a closed position, and the locking piece can release the bolt;
when the second state, the locking piece can release earthing switch's valve, just the locking piece can lock the spring bolt.
2. An interlock device according to claim 1, wherein the locking member is provided with a limiting groove, and in the first state the shutter of the earthing switch cooperates with the limiting groove for locking the earthing switch in the closed position.
3. The interlock of claim 1 wherein said locking member is hingedly connected to said mounting base, said locking member having a first angle and a second angle relative to said mounting base;
when the bolt is at a first angle, the locking piece is arranged in parallel with the mounting seat, a gap is formed between one end, close to the bolt, of the locking piece and the mounting seat, and the bolt can penetrate through the gap;
when the lock piece is at the second angle, the lock piece is opened relative to the mounting seat, the gap between one end of the lock piece close to the lock bolt and the mounting seat is reduced, and the lock piece limits the lock bolt.
4. The interlock device according to claim 3, wherein the locking member comprises a first locking portion and a second locking portion, the first locking portion is located at one side of the second locking portion close to the bolt, an ear portion extending to both sides is provided at a connecting portion of the first locking portion and the second locking portion, and the locking member is hinged to the mounting seat through the ear portion;
a gap is formed between the first locking part and the mounting seat;
and the second locking part is provided with a limiting groove, and the limiting groove is matched with a valve of the grounding switch at a first angle.
5. The interlock of claim 4 wherein the width of the first locking portion is less than the width of the gap between the first locking portion and the mount at the first angle.
6. The interlock device according to claim 2, wherein in the first state, the shutter of the earthing switch passes through the limit slot, and the unilateral clearance between the shutter and the limit slot is 1mm-5 mm.
7. The interlock of claim 4 wherein the first locking portion is provided with a stop block for stopping the bolt.
8. The interlock of claim 7 wherein said stop is in the form of a semi-cylinder, the plane of said semi-cylinder abutting said first locking portion, the arcuate face of said semi-cylinder serving to stop the bolt.
9. An interlock device according to claim 4, wherein the second locking portion is provided with a flange directed towards the mounting seat.
10. A switchgear cabinet comprising an interlock device according to any one of claims 1 to 9, wherein the mounting base is fixed to an outer surface of the cabinet body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121143151.4U CN215069784U (en) | 2021-05-26 | 2021-05-26 | Interlock and cubical switchboard |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121143151.4U CN215069784U (en) | 2021-05-26 | 2021-05-26 | Interlock and cubical switchboard |
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| Publication Number | Publication Date |
|---|---|
| CN215069784U true CN215069784U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121143151.4U Active CN215069784U (en) | 2021-05-26 | 2021-05-26 | Interlock and cubical switchboard |
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| CN (1) | CN215069784U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115642044A (en) * | 2022-12-09 | 2023-01-24 | 宁波耐森电气科技有限公司 | Mechanical interlocking device and power equipment |
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2021
- 2021-05-26 CN CN202121143151.4U patent/CN215069784U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115642044A (en) * | 2022-12-09 | 2023-01-24 | 宁波耐森电气科技有限公司 | Mechanical interlocking device and power equipment |
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