Mechanism for linkage between open state of device containment apparatus and electrical switch

Abstract

A mechanism for linkage between the open state of a device containment apparatus and an electrical switch, relating to the technical field of electrical and electromechanical technology, comprising: a switch shaft (1-1), which is rotatably arranged on a side wall of a box, case, cabinet or enclosure; a lock hook (1-2), which is arranged inside the box, case, cabinet or enclosure, one end thereof being fixed at an inner end of the switch shaft (1-1); a hook head (1-3), which is mounted at the other end of the lock hook (1-2) via a hook head rotating shaft (1-6), the hook head (1-3) rotating around the hook head rotating shaft (1-6) through a limited angle; a spring (1-4), which is mounted between the lock hook (1-2) and the hook head (1-3); a lock pin (2-1), which is fixed on the inner side of a door or cover of the box, case, cabinet or enclosure, the rotation axis thereof being parallel or perpendicular to that of the hook head (1-3); and a switch block (1-10), which is fixed on the lock hook (1-2), controlling an electrical switch (1-5) to turn on or off during rotation of the lock hook (1-2). When the switch shaft (1-1) is rotated to a locked position, since the hook head (1-3) is rotatable, the hook head (1-3) does not obstruct closing of the door or cover, thereby preventing the problem of component damage due to improper use, and preventing the problem of linkage failure between the open state of the box, case, cabinet or enclosure and the electrical switch.

Description

A mechanism for linking the open state of an equipment holding device with an electrical switch. Technical Field

[0001] This invention relates to the fields of electrical and electromechanical technology, and in particular to a mechanism that links the open state of an equipment holding device with an electrical switch. Background Technology

[0002] Electrical or electromechanical equipment typically requires protection and is therefore housed in enclosures such as boxes, cabinets, and shells. Because regular inspection, maintenance, and repair are necessary, these enclosures typically have doors or lids that can be opened to provide access for observation, maintenance, and repair. For safety, some equipment requires the power supply to be disconnected from all or part of the internal circuitry when the door or lid is opened; others require the lighting circuit to be switched on when the door or lid is opened for observation. In summary, the opening status of the equipment enclosure needs to be linked to an electrical switch.

[0003] Existing solutions mostly use rotatable mechanical parts (referred to as hooks) installed on boxes, cabinets, and shells to hook onto fixed mechanical parts (referred to as pins) on doors or covers, linking the hooks with electrical switches, and using the hooks to control the on or off of the electrical switches.

[0004] During maintenance or inspection, it may be necessary to change the state of the linked electrical switch, that is, to change the position of the locking hook. If the position of the locking hook is not adjusted to the open state when the door or cover of the equipment is closed, the locking hook or pin may be damaged, causing the linkage between the open state of the box, cabinet, or shell and the electrical switch to fail. Summary of the Invention

[0005] In view of the defects of the prior art, the present invention provides a mechanism that links the open state of the equipment holding device with the electrical switch, thereby solving the existing problems.

[0006] The present invention adopts the following technical solution:

[0007] This invention provides a mechanism for linking the open state of a device holding apparatus with an electrical switch. The device holding apparatus is a box, container, cabinet, or shell, and an electrical switch is installed inside it. The mechanism for linking the open state of the device holding apparatus with the electrical switch includes at least:

[0008] The switch shaft is rotatably mounted on the side wall of the box, cabinet, and shell, with its inner end extending into the interior of the box, cabinet, and shell, and its outer end extending into the exterior of the box, cabinet, and shell.

[0009] Locking hooks are installed inside boxes, cabinets, and shells, with one end fixed to the inner end of the switch shaft;

[0010] The hook head is mounted on the other end of the lock hook via a hook head pivot, and the hook head can rotate around the hook head pivot at a limited angle.

[0011] A spring is installed between the lock hook and the hook head. When the lock hook and the hook head rotate relative to each other, the spring generates or releases elastic force.

[0012] Locking pins are fixed to the inside of the doors or lids of boxes, cabinets, and shells, and their axis of rotation is parallel or perpendicular to the axis of rotation of the hook head.

[0013] The switch block is fixed on the lock hook and controls the electrical switch to be turned on or off during the rotation of the lock hook.

[0014] Preferably, the switch shaft is a key switch, which is turned with a matching key. A locking hook is fixed on its rotating body. The key switch itself has a contact switch, which can replace the electrical switch or be connected in series with the electrical switch.

[0015] Preferably, the hook head is block-shaped with a hole at one end. The hook head pivot passes through the hole and rotates around the axis of the hole. The side that contacts the lock hook has a fan-shaped groove, and the side of the lock hook that contacts the hook head has a boss located in the fan-shaped groove of the hook head. The spring is located in the fan-shaped groove.

[0016] Preferably, the spring is a torsion spring, which is sleeved on the hook head shaft, with one torsion arm engaged in the wall of the fan-shaped groove and the other torsion arm engaged in the side of the boss.

[0017] Preferably, the hook head is block-shaped with a hole at one end. The hook head pivot passes through the hole and rotates around the axis of the hole. The side that is in contact with the lock hook has a boss, and the side of the lock hook that is in contact with the hook head has a fan-shaped groove. The boss is located in the fan-shaped groove, and the spring is located in the fan-shaped groove.

[0018] Preferably, the end of the hook head away from the hole is an arc surface, and the axis of the arc surface is the axis of the hole where the hook head shaft is installed.

[0019] Compared with the prior art, the above-mentioned at least one technical solution adopted by the present invention can achieve the following beneficial effects:

[0020] This invention features a hook head at the end of the locking hook that can rotate at a limited angle. This hook head limits the locking pin on the inside of the door or cover of a box, cabinet, or shell. This structure ensures that the door or cover of the box, cabinet, or shell cannot be opened arbitrarily after being closed and locked by the hook head. The door or cover can only be opened after the switch shaft is rotated from the locked position to the free position. During the rotation of the switch shaft, the electrical switch installed inside the box, cabinet, or shell is controlled to open or close according to regulations. Even if the locking hook position is forgotten to be aligned with the open position after the switch shaft is rotated to the locked position, the rotatable hook head will not obstruct the closing of the door or cover, preventing damage to parts due to improper use and avoiding the problem of the linkage between the open state of the box, cabinet, or shell and the electrical switch malfunctioning. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 is a schematic diagram of the installation position of the equipment holding device and the split electrical switch of the present invention; wherein, when the switch shaft is in the locked position, the electrical switch is in the on state;

[0023] Figure 2 is a schematic diagram showing the position of the external switch shaft of the equipment holding device;

[0024] In Figure 2(a): Schematic diagram of the locked position switch shaft position; Figure 2(b): Schematic diagram of the free position switch shaft position;

[0025] Figure 3 is a schematic diagram of the electrical switch in the open state when the switch shaft of the present invention is in the free position;

[0026] Figure 4 is a schematic diagram of the installation position of another equipment holding device linked with a split electrical switch;

[0027] Figure 4(a): Schematic diagram of the electrical switch in the off state when the switch shaft of the present invention is in the locked position; Figure 4(b): Schematic diagram of the electrical switch in the on state when the switch shaft of the present invention is in the free position.

[0028] Figure 5 shows two forms of the switch shaft of the present invention;

[0029] Among them, Figure 5(a): a schematic diagram of the switch shaft end having a lever structure and being locked in the locked position using a padlock; Figure 5(b): a schematic diagram of the position of the key switch shaft.

[0030] Figure 6 is a schematic diagram of the present invention when the equipment holding device and the integrated electrical switch linkage shaft are in the locked position.

[0031] Figure 7 is a schematic diagram of the present invention when the equipment holding device and the integrated electrical switch linkage shaft are in a free position.

[0032] Figure 8 is an exploded view of the first hook installation position according to the present invention;

[0033] Among them, Figure 8(a): the first type of hook head, and Figure 8(b): the installation diagram of the first type of hook head;

[0034] Figure 9 is an exploded view of the second hook installation position of the present invention;

[0035] Among them, Figure 9(a): the second type of hook, and Figure 9(b): the installation diagram of the second type of hook;

[0036] Figure 10 is a schematic diagram of the hook head rotation position of the present invention;

[0037] Among them, Figure 10(a): schematic diagram of the position where the locking pin presses down and the hook head starts to rotate; Figure 10(b): schematic diagram of the initial position where the locking pin disengages from the hook head and resets; Figure 10(c): schematic diagram of the final position where the hook head rotates and resets.

[0038] In the diagram: 1-1-Switch shaft, 1-2-Locking hook, 1-3-Hook head, 1-4-Spring, 1-5-Electrical switch, 1-6-Hook head rotating shaft, 1-7-Hook head fastener, 1-8-Electrical switch fastener, 1-9-Locking hook fastener, 1-10-Switch block, 1-11-Fan-shaped groove, 1-12-Boss, 1-13-Static contact, 1-14-Moving contact, 2-1-Locking pin, 2-2-Locking pin fastener, 4-1-Upper locking buckle, 4-2-Upper locking buckle fixing shaft, 5-1-Machine cover, 5-2-Machine housing. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0040] Referring to Figure 1, this invention provides a mechanism for linking the open state of a device holding device with an electrical switch. Specifically, it relates to a mechanism for linking the open state of a box, cabinet, or shell with a separate electrical switch, used to disconnect the electrical switch when the box, cabinet, or shell is open. The opening power-off device includes a switch shaft 1-1, a locking hook 1-2, and a hook head 1-3. The switch shaft 1-1 is rotatable at a certain angle and passes through the housing 5-2 and the locking hook 1-2 from the outside to the inside. It is then fastened with a locking hook fastener 1-9, fixing the locking hook to the switch shaft. At this time, the locking hook 1-2 can swing at a certain angle following the rotation of the switch shaft 1-1. The hook head 1-3 is rotatably mounted on one side of the top of the locking hook 1-2 via a movable component. A switch block 1-10 is fixedly mounted on the locking hook 1-2. A moving contact 1-14 is fixed on the switch block. When the moving contact 1-14 and the stationary contact 1-13 contact, the safety switch closes. Rotating the switch shaft 1-1 in a certain direction can disconnect the normally connected moving and stationary contacts, thereby achieving the purpose of power-off. Only after the power is off can the cover be opened for operation, effectively protecting personnel safety. Based on this function, considering the possibility of abnormal operating procedures, such as maintenance personnel turning the switch shaft 1-1 to the locked position before closing the cover 5-1 after maintenance, a function to prevent damage to the opening power-off mechanism during the closing action has been added. The mechanism of this invention, linking the open state of the equipment holding device with the electrical switch, includes an opening power-off device and a cover 5-1 locking pin module. An electrical switch is installed inside the equipment holding device. This electrical switch is normally on; it must be disconnected after the equipment holding device is opened, or it is normally off; it must be turned on after the equipment holding device is opened.

[0041] Furthermore, the locking pin module of the cover 5-1 consists of locking pin 2-1 and locking pin fastener 2-2. The locking pin cooperates with the hook to control whether the cover 5-1 can be opened. Locking pin 2-1 is installed through the side wall of the cover 5-1 of the equipment holding device, extending from the outside to the inside of the cover 5-1, and is locked and fixed to the side wall of the cover 5-1 by locking pin fastener 2-2. After the cover is closed, the hook 1-3 of the cover opening and power-off device hooks the part of locking pin 2-1 inside the cover 5-1, at which time the cover 5-1 will be restricted from opening. The opening and closing process of the cover 5-1 has no risk of movement interference with other components except for interference with the hook 1-3 of the cover opening and power-off device; it can be ensured that the cover 5-1 can only be opened smoothly when the cover 5-1 is closed, by first rotating the switch shaft 1-1 by a certain angle to disengage the hook 1-3 from the pin shaft 2-1.

[0042] Referring to Figure 2, the end of the switch shaft 1-1 exposed outside the equipment holding device has a lever and a limiting structure. The locking buckle 4-1 is installed on the side wall of the equipment holding device housing via a locking buckle fixing shaft. The locking buckle 4-1 can rotate a certain angle, without restriction on whether it rotates with or around the shaft. When the switch shaft 1-1 is in the locked position, rotating the locking buckle 4-1 presses against the lever structure of the switch shaft 1-1 and locks the lever structure connecting the locking buckle 4-1 and the lever structure of the switch shaft 1-1, thus locking the switch shaft 1-1 in the locked position and preventing its position from changing. To open and remove the lock, rotating the locking buckle 4-1 away from the lever structure of the switch shaft 1-1 allows the switch shaft 1-1 to be moved to the free position.

[0043] Referring to Figure 3, the hook head 1-3 is rotatably mounted on one side of the top of the locking hook 1-2 via a movable component. When the switch shaft is in the free position, the electrical switch is off, and the hook head 1-3 rotates with the locking hook 1-2 to a position that does not restrict the movement of the locking pin. The opening or closing of the cover 5-1 is not affected by the hook head. When the switch shaft rotates to the locked position, the electrical switch is on, and the hook head 1-3 rotates with the locking hook 1-2 to a position that restricts the movement of the locking pin. The locking pin is blocked by the hook head, and the cover 5-1 cannot be opened.

[0044] Furthermore, as shown in Figure 4, this invention presents another installation position diagram of the linkage between the equipment holding device and the separate electrical switch; the switch block 1-10 can be installed at different positions of the locking hook 1-2, rotating with the switch shaft 1-1 to connect or disconnect with the stationary contact, controlling the on / off state of the internal circuit. When the switch shaft is in the locked position, the electrical switch is off, and the hook head restricts the movement of the locking pin; when the switch shaft is in the free position, the electrical switch is on, and the hook head does not restrict the movement of the locking pin.

[0045] Furthermore, as shown in Figure 5(a), the switch shaft end has a lever structure, which is locked in the locked position using a padlock. As shown in Figure 5(b), the switch shaft 1-1 is a key switch, which is turned with a matching key. The rotating body has a fixed locking hook 1-2. Furthermore, the key switch itself has a contact switch, which can replace the electrical switch or be connected in series with the electrical switch.

[0046] Furthermore, as shown in Figures 6 and 7, the separate electrical switch is replaced with an integrated electrical switch 1-5 that operates with contacts. The switch block 1-10 controls the movement of the contacts during the movement of the switch shaft or the locking hook, thus opening or closing the integrated electrical switch 1-5. Figure 6 shows the switch block actuating the contacts when the hook restricts the movement of the pin shaft, and Figure 7 shows the switch block releasing the contacts when the hook does not restrict the movement of the pin shaft. Furthermore, the relationship between the release or actuation of the contacts by the switch block and whether the hook restricts the movement of the pin shaft can be the opposite of that shown in Figures 6 and 7. Furthermore, the integrated electrical switch can be normally open or normally closed. Furthermore, the integrated electrical switch can have both normally open and normally closed contacts simultaneously.

[0047] This invention is not limited to the linkage between the on / off state of the electrical switch and the open state of the equipment holding device. The integrated contact can be either a normally open contact or a normally closed contact to meet the circuit on / off control requirements. Ultimately, the open state of the equipment holding device is associated with the on or off state of the electrical switch.

[0048] Furthermore, as shown in Figure 8, the hook head 1-3 and the locking hook 1-2 are connected by a spring 1-4, a hook head pivot 1-6, and a hook head fastener 1-7 to form a rotatable structure. The hook head pivot 1-6 passes through the locking hook 1-2 and the hook head 1-3, and the two are fixed by the hook head fastener 1-7. A spring 1-4 is provided between the hook head 1-3 and the locking hook 1-2. The hook head 1-2 has a fan-shaped groove 1-11, and the spring 1-4 is installed in the fan-shaped groove 1-11. The locking hook 1-2 has a boss 1-12. One arm of the spring is engaged with the boss 1-12, and the other arm is engaged with the edge of the fan-shaped groove 1-11. This allows the hook head 1-3 to have a certain rotation angle. When the hook head 1-3 is not subjected to external force, the torque generated by the torsion spring causes the hook head 1-3 to rotate until the wall of the fan-shaped groove 1-11 is in close contact with the boss 1-12 of the locking hook 1-2. When the door or cover of the box, cabinet, or shell is closed, and the switch shaft 1-1 is in the locked position, directly opening the door or cover causes the pin to push the hook head in the direction of rotation, making the wall of the fan-shaped groove 1-11 continuously press against the boss 1-12 of the locking hook. The hook head is mechanically blocked and cannot rotate, so the door or cover of the box, cabinet, or shell cannot be opened. When the door or cover of the box, cabinet, or shell is opened, and the switch shaft is in the locked position, closing the door or cover causes the pin to push the hook head in the direction of rotation, making the wall of the fan-shaped groove 1-11 continuously move away from the boss 1-12 of the locking hook. The hook head rotates and twists the torsion spring until the pin and the hook head disengage. Under the torque of the torsion spring, the hook head rotates until the wall of the fan-shaped groove 1-11 is pressed against the boss 1-12 of the locking hook.

[0049] Furthermore, referring to Figure 9, spring 1-4 is a torsion spring, which is sleeved on hook head pivot 1-6. One torsion arm is engaged with the wall of the fan-shaped groove 1-11 of the hook head, and the other torsion arm is engaged with the side of the boss 1-12 of the lock hook. Referring to Figure 9, hook head 1-3 is block-shaped with a hole at one end. Hook head pivot 1-6 passes through the hole and rotates around the axis of the hole. The side that is in contact with lock hook 1-2 has a boss 1-12. The side of lock hook 1-2 that is in contact with hook head 1-3 has a fan-shaped groove 1-11. The boss 1-12 is located in the fan-shaped groove 1-11, and spring 1-4 is located in the fan-shaped groove 1-11.

[0050] Furthermore, the electrical switch consists of a stationary contact and an independent moving contact, forming a separate structure. When the moving contact moves to the appropriate position, the electrical switch is turned on, and when it moves to the appropriate position, the electrical switch is turned off. The switch block 1-10 controls the electrical switch to be turned on or off as it rotates with the locking hook 1-2. The moving contact of the electrical switch is fixed on the switch block 1-10 and moves with the switch block 1-10 to turn the electrical switch on or off.

[0051] Furthermore, the electrical switch is an integrated structure containing a stationary contact and a moving contact. The mechanism that controls the movement of the moving contact extends out of the electrical switch and controls the position of the contact to connect or disconnect the electrical switch. As the switch block rotates with the locking hook 1-2, the switch block touches or releases the contact to generate a certain stroke, thereby controlling the electrical switch to connect or disconnect.

[0052] This invention is not limited to the rotation angle shown; the initial position and rotatable angle can be set at any angle according to actual needs.

[0053] Furthermore, Figure 10 is a schematic diagram of the hook head anti-accidental closing function position. The radius of the locking pin 2-1 is R1, the radius of the arc at the upper end of the locking hook 1-2 is R2, and the movement radius of the locking pin 2-1 when the cover 5-1 is closed is R3. The relationship between R1, R2 and R3 is: R3 = R2 + R1 + reserved movement gap Y (Y>0mm).

[0054] Hook 1-3 is connected to locking hook 1-2 via hook shaft 1-6 as its rotation axis and fasteners. An internal spring allows it to swing at a certain angle. When the switch shaft is in the locked position, the position of hook 1-3 interferes with the locking pin 2-1 during the lid closing action. To prevent the locking pin from damaging the hook during lid closing in this situation, an anti-accidental lid closing function is added to the hook to avoid damage to the lid opening and power-off mechanism. During the closing process of the lid 5-1, the locking pin 2-1 on the lid 5-1 can apply pressure to the outer contour surface of hook 1-3 after contacting it. The spring inside hook 1-3 is compressed, and hook 1-3 rotates with the locking pin 2-1. After the hook 1-3 rotates a certain angle, the displacement of locking pin 2-1 exceeds the outer contour length of hook 1-3, and hook 1-3 resets using the spring. Hook 1-3 can smoothly lift up the instant it disengages from the locking pin 2-1 of the lid 5-1, without any dead point. At this time, the lid 5-1 will be restricted and cannot be opened.

[0055] The working principle of this invention is as follows:

[0056] The rotation of switch shaft 1-1 is restricted, allowing it to rotate only within a certain range. It is typically in one of two extreme positions: a restricted position called the locked position (see Figure 2(a)) and a restricted position called the free position (see Figure 2(b)). When switch shaft 1-1 is in the locked position, it can be mechanically locked and cannot rotate freely; it can only be rotated when the mechanical lock is released.

[0057] If the door or cover of the box, cabinet, or shell is closed, after rotating the switch shaft 1-1 from the free position to the locked position, the hook head 1-3 will restrict the pin from moving with the door or cover in the direction of opening, preventing the door or cover from being opened. Only when the lock of the switch shaft 1-1 is released and the switch shaft 1-1 is rotated to the free position will the pin be freed from the restriction of the hook head and can rotate with the door or cover in the direction of opening. Whether the door or cover is closed or not, the switch shaft can rotate freely from the free position to the locked position. If the door or cover is closed, after the switch shaft rotates from the free position to the locked position, the hook head rotates with the switch shaft into the path of the pin as the door or cover opens, blocking the pin from moving in the direction the door or cover opens. If the door or cover is not closed after the switch shaft rotates from the free position to the locked position, and then the door or cover is closed, the hook head is already in the path of the pin as the door or cover closes. However, the spring between the hook head and the lock hook can deform, causing the hook head to rotate under the pressure of the pin until the pin and the hook head disengage. There is no force between them, and since the hook head is no longer compressed by the pin, the spring force drives the hook head back to the limit position, in the path of the pin as the door or cover opens, thus restricting the opening of the door or cover.

[0058] As can be seen, when the door or cover of the equipment holding device is closed, and the pin on it is restricted from moving in the direction of opening the door or cover by the hook, the switch shaft must be rotated to release the restriction of the hook on the pin's movement in the direction of opening the door or cover, so that the door or cover can be opened. The opposite direction is not restricted. In other words, the closing of the door or cover is not restricted by the hook. This realizes the correlation between the open state of the equipment holding device and the position of the switch shaft (hook).

[0059] During the rotation of the switch shaft, the switch block rotates accordingly. The rotation of the switch block changes the on / off state of the electrical switch. As needed, when the switch shaft is in the locked position, the switch block controls the electrical switch to be on; when it is in the free position, the switch block controls the electrical switch to be off. Alternatively, when the switch shaft is in the locked position, the switch block controls the electrical switch to be off; when it is in the free position, the switch block controls the electrical switch to be on. Ultimately, the open state of the equipment's container lid is associated with the on / off state of the electrical switch.

[0060] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0061] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A mechanism for linking the open state of an equipment holding device with an electrical switch, wherein the equipment holding device is a box, container, cabinet, or shell, and an electrical switch is installed inside it, the mechanism for linking the open state of the equipment holding device with the electrical switch includes at least: The switch shaft (1-1) is rotatably mounted on the side wall of the box, cabinet, and shell, with its inner end extending into the interior of the box, cabinet, and shell, and its outer end extending into the exterior of the box, cabinet, and shell. Locking hooks (1-2) are installed inside boxes, cabinets, and shells, with one end fixed to the inner end of the switch shaft (1-1); The hook head (1-3) is mounted on the other end of the locking hook (1-2) via the hook head pivot (1-6), and the hook head (1-3) rotates around the hook head pivot (1-6) at a limited angle; A spring (1-4) is installed between the lock hook (1-2) and the hook head (1-3). When the lock hook (1-2) and the hook head (1-3) rotate relative to each other, the spring (1-4) generates or releases elastic force. Locking pin (2-1) is fixed on the inside of the door or cover of a box, cabinet, or shell, and its axis of rotation is parallel or perpendicular to the axis of rotation of the hook (1-3). The switch block (1-10) is fixed on the lock hook (1-2) and controls the electrical switch to be turned on or off during the rotation of the lock hook (1-2).

2. The mechanism for linking the open state of the equipment holding device with an electrical switch as described in claim 1, characterized in that, The switch shaft (1-1) is a key switch, which is turned with a matching key. A locking hook (1-2) is fixed on its rotating body. The key switch itself has a contact switch, which can replace the electrical switch or be connected in series with the electrical switch.

3. The mechanism for linking the open state of the equipment holding device with an electrical switch as described in claim 1, characterized in that, The hook head (1-3) is block-shaped with a hole at one end. The hook head pivot (1-6) passes through the hole and rotates around the axis of the hole. The side that is in contact with the lock hook (1-2) has a fan-shaped groove (1-11). The side that is in contact with the hook head (1-3) has a boss (1-12). The boss (1-12) is located in the fan-shaped groove (1-11) of the hook head (1-3). The spring (1-4) is located in the fan-shaped groove (1-11).

4. The mechanism for linking the open state of the equipment holding device with an electrical switch as described in claim 3, characterized in that, The spring (1-4) is a torsion spring, which is sleeved on the hook head shaft (1-6). One torsion arm is locked on the wall of the fan-shaped groove (1-11), and the other torsion arm is locked on the side of the boss (1-12).

5. The mechanism for linking the open state of the equipment holding device with an electrical switch as described in claim 1, characterized in that, The hook head (1-3) is block-shaped with a hole at one end. The hook head pivot (1-6) passes through the hole and rotates around the axis of the hole. There is a boss (1-12) on the side that is in contact with the lock hook (1-2). There is a fan-shaped groove (1-11) on the side that is in contact with the hook head (1-3). The boss (1-12) is located in the fan-shaped groove (1-11). The spring (1-4) is located in the fan-shaped groove (1-11).

6. The mechanism for linking the open state of the equipment holding device with an electrical switch as described in claim 5, characterized in that, The end of the hook (1-3) away from the hole is an arc surface, and the axis of the arc surface is the axis of the hole where the hook shaft (1-6) is installed.

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