CN215251799U - Switch box - Google Patents

Abstract

The utility model relates to a household electrical appliances accessory field specifically is a switch box, including casing and locking piece. A sliding block is arranged in the shell, a locking sliding groove is arranged on the sliding block, and the locking sliding groove is a one-way rotation double-locking-point track groove; the upper part of the sliding block is provided with a swinging steel wire which is U-shaped, one end of the swinging steel wire is fixedly connected with the shell on the upper part of the sliding block, and the other end of the swinging steel wire is abutted against the locking sliding groove; the bottom surface of the sliding block is provided with a rotating steering column; a fixed steering column, a front fixed terminal and a rear fixed terminal are arranged behind the sliding block, memory alloy wires are wound on the fixed steering column and the movable steering column, and two ends of each memory alloy wire are fixedly and electrically connected with the front fixed terminal and the rear fixed terminal; after the memory alloy wire is electrified, the sliding block is pulled backwards to drive the locking block to slide, so that the door lock is locked. The utility model has the advantages of simple structure, small volume, light weight and low power consumption.

Description

Switch box

Technical Field

The utility model relates to a household electrical appliances accessory field specifically is a switch box.

Background

In the safety protection of the washing machine, the washing machine can be started only by locking the door of the washing machine so as to avoid danger. The electromagnetic lock is adopted to lock the door lock in the prior art, the size of the door lock structure is large when the electromagnetic coil is used as power, meanwhile, the power consumption is large, the production cost is high, the use cost is high, and therefore the design of a light and low-power-consumption switch box is an urgent requirement.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is: a switch box with simple structure, low cost and low power consumption is provided.

The to-be-solved technical problem of the utility model is that: the utility model provides a switch box, includes casing, locking piece, its characterized in that: a slide way is arranged in the shell, a slide block is arranged on the slide way in a sliding manner, a locking sliding groove is arranged on the slide block, and the locking sliding groove is a unidirectional rotation double-locking-point track groove; the bottom surface of the sliding block is provided with a rotating steering column; the sliding block drives the locking block to slide; the upper part of the sliding block is provided with a swinging steel wire which is U-shaped, one end of the swinging steel wire is fixedly connected with the shell on the upper part of the sliding block, and the other end of the swinging steel wire is abutted against the locking sliding groove; a fixed steering column, a front fixed terminal and a rear fixed terminal are arranged behind the sliding block, and the front fixed terminal and the rear fixed terminal are positioned in front of and behind the fixed steering column; the fixed steering column and the movable steering column are wound with memory alloy wires, and two ends of each memory alloy wire are fixedly connected and electrically connected with the front fixed terminal and the rear fixed terminal; the memory alloy wire pulls the sliding block backwards after being electrified, and a return spring for driving the sliding block to pull forwards is arranged between the sliding block and the shell.

Preferably, the sliding block is provided with a pin block, and the pin block is fixedly connected with the position, close to the end, of the memory alloy wire.

Preferably, the upper part of the rotary steering column and/or the fixed steering column is sleeved with a pulley.

Preferably, a shifting block is arranged on the side surface of the sliding block, and a rotating cam is arranged on one side, close to the shifting block, in the shell;

one side of the rotating cam, which is close to the shifting block, is provided with two swinging protrusions, and the two swinging protrusions are inserted between the two shifting blocks; the rotating cam is provided with a driving protrusion, and the driving protrusion drives the locking block to pop up or retract.

Preferably, the number of the rotating steering columns is two.

Preferably, the housing is provided with a lead terminal, and a PTC protection module is connected in series between the rear fixing terminal and the lead terminal.

Preferably, a spiral chute is arranged on the periphery of the driving protrusion, a shifting block is arranged on one surface of the locking block facing the rotating cam, and the shifting block is inserted in the spiral chute; the rotating cam drives the locking block to slide in the axial direction of the rotating cam;

the shell is provided with a lock hole corresponding to the sliding direction of the lock block.

Preferably, the driving protrusion includes a push-out protrusion and a pull-back protrusion, the push-out protrusion is provided with a space in both the axial direction and the circumferential direction of the rotating cam, and a spiral sliding groove is formed between the push-out protrusion and the pull-back protrusion.

Preferably, the device also comprises a main loop control contact, the lead terminals comprise a power-on terminal, a common terminal and a control terminal,

the power-on terminal is electrically connected with the rear fixed terminal, or the power-on terminal is electrically connected with the rear fixed terminal through the PTC protection module;

the main loop control contact comprises a U-shaped conducting strip, the closed end of the U-shaped conducting strip is electrically connected and fixedly connected with the common terminal, and the moving direction of the open end of the U-shaped conducting strip is the same as the axial direction of the rotating cam;

a first movable terminal and a second movable terminal are respectively arranged on two sides of the opening end of the U-shaped conducting plate; the front fixed terminal is arranged on the terminal fixed seat, and the first movable terminal is electrically connected with the front fixed terminal;

the upper part of the second movable terminal is connected with the bottom of the locking block;

the lower part of the locking block is provided with a static contact which is fixedly connected with the shell and electrically connected with the control terminal;

a movable contact is arranged on the second movable terminal corresponding to the position of the fixed contact; when the sliding block drives the locking block to slide out of the shell, the moving contact and the static contact are combined.

Preferably, the device comprises a main circuit control contact which is a position switch.

The utility model has the advantages that:

1. the memory alloy wire has low cost, and compared with a coil wound by a copper wire, the memory alloy wire can greatly reduce the cost, and simultaneously reduce the volume and the quality, so that the household appliance is lighter and more exquisite.

2. The utility model discloses can realize accomplishing locking and unblock under circular telegram 40 ms's state, all the other states are non-conductive state, and the power consumption that can greatly reduced with solenoid keeps conducting state.

3. Through setting up the control contact, can realize the shutting of lock and major loop control, only after the lock locking, can start major loop and start motor rotates, consequently improved the security greatly.

Drawings

Fig. 1 is a schematic view of an embodiment of the present invention.

Fig. 2 is an inner top view of an embodiment of the present invention.

Fig. 3 is a schematic side sectional view of an internal structure of an embodiment of the present invention.

Fig. 4 is a schematic diagram of the internal structure of an embodiment of the present invention.

Fig. 5 is a schematic view of a slider according to an embodiment of the present invention.

In the figure:

1011. a rear chute; 1013. a front slideway; 1012. a reversing lane; 41. a terminal holder; 105. a slideway; 104. a lock hole; 9022. pulling back the projection; 9021. pushing out the protrusion; 12. a movable contact; 13. a stationary contact; 142. a second movable terminal; 141. a first movable terminal; 111. a shifting block; 6. a rear fixed terminal; 4. a front fixed terminal; 2. swinging the steel wire; 18. a control terminal; 17. a common terminal; 16. a power-on terminal; 7. a PTC protection module; 901. swinging the boss; 902. a drive boss; 11. a locking block; 10. a pin block; 3. memorizing alloy wires; 5. a steering column; 9. rotating the cam; 103. rotating the steering column; 102. shifting blocks; 101. locking the chute; 1. a slider;

Detailed Description

In order to make the technical solution and the beneficial effects of the present invention clearer, the following is a further detailed explanation of the embodiments of the present invention.

A switch box comprises a shell, a locking block 11 and a driving mechanism for driving the locking block 11 to slide. As shown in fig. 1, a lock hole 104 is provided on the housing, and the lock block 11 protrudes out of the lock hole after being driven to achieve locking. The utility model discloses an actuating mechanism adopts memory alloy silk 3 characteristic that length changes under the on-state, realizes the drive to locking piece 11.

In order to realize the position movement, a slide way 105 is arranged in the shell, as shown in fig. 2, the slide way 105 is arranged at the left front part of the shell, the slide way 105 comprises two protrusions with the length direction being the front-back direction to form a slide way, a protrusion with the length direction being the front-back direction is arranged at a position close to the edge of the shell, and the protrusion and the shell form a slide way. The rear part of the sliding block 1 is provided with a bulge embedded in the slideway for limiting the sliding direction. A locking slide groove 101 is provided at a front portion of the slider 1, and a swing wire 2 is provided at an upper portion of the locking slide groove 101 in order to lock and fix the slider 1. The swing steel wire 2 is U-shaped, a fixing seat is arranged at the front end of the slide way 105, and the other end of the swing steel wire 2 is inserted into the locking chute 101 in the fixing seat fixedly installed at one end of the swing steel wire 2. The swinging wire 2 applies a downward force to the slider 1 to ensure that the slider 1 does not come off the slide 105.

The overall shape of the locking chute 101 is a circular heart shape, and includes a rear chute 1011, a reversing chute 1012, and a front chute 1013. The depth of the rear ramp is less than the depth of the turnaround 1012, the depth of the lower end of the front ramp 1013 is less than the depth of the lower end of the rear ramp 1011, and the depth of the upper end of the front ramp 1013 is greater than the depth of the turnaround 1012. In a normal state, the rear end of the swing wire 2 is inserted into the rear end of the rear rail 1011, and the swing wire 2 has elasticity and can apply a force to the slider 1 toward the front rail 1013 side. When the slider 1 is forced to move backwards, the lower end of the swing steel wire 2 slides forwards in the back slideway 1011 relative to the slider 1, the backward pulling force is lost when the slider slides to the position of the reversing track 1012, the slider 1 receives a forward pulling force under the action of the return spring, as shown in fig. 5, a locking concave part is arranged at the front end of the front slideway 1013, and the rear end of the swing steel wire 2 is clamped in the concave part to realize the locking of the position of the slider 1. When a backward acting force is applied again, the rear end of the swing wire 2 jumps out of the recess and slides down into the front slide 1013 on the left side of the recess under its own elastic force, and after the backward pulling force is lost, the slider slides forward under the forward acting force of the return spring, and the rear end of the swing wire 2 moves toward the rear end of the slider in the lock slide 101 and is finally caught at the rear end of the rear slide 1011.

Through the structure, the slider 1 can be switched between two positions, and then the slider 1 can drive the locking block 11 to slide, so that the locking block 11 extends into the lock hole or is pulled out of the lock hole.

In order to apply a forward pulling force to the sliding block 1, a return spring for driving the sliding block 1 to pull forward is arranged between the sliding block 1 and the shell. Reset spring can be the pressure spring, and reset spring sets up in the rear end of slider 1, receives the pulling force after the compression, loses and resets after the pulling force, and then can order about 1 antedisplacement of slider. At this time, a stop piece is required to be arranged at the rear part of the sliding block 1 for installing the return spring.

In order to apply a rearward pulling force to the slider 1, a steering column 103 is provided on the slider 1. The steering column 103 in this embodiment is provided on the bottom surface of the lower part of the slider, and may be provided on the side surface of the upper part or rear part of the slider 1. The rotating steering column 103 is mounted on the slider 1 through a rotating shaft.

The rear of the slider 1 is provided with a fixed steering column 5, a front fixed terminal 4 and a rear fixed terminal 6, and the front fixed terminal 4 and the rear fixed terminal 6 are positioned in front of and behind the fixed steering column 5. As shown in the drawing, the rear fixed terminal 6 is located at the rear left of the steering column 5, i.e., at the rear left corner of the housing. The front fixed terminal 4 is provided at the front right of the steering column 5 at a position in the middle of the housing. Two ends of the memory alloy wire 3 are respectively fixedly connected and electrically connected with the front fixed terminal 4 and the rear fixed terminal 6. The memory alloy wire 3 is wound on the fixed steering column 5 and the movable steering column 103, and then the memory alloy wire 3 contracts and shortens after being electrified, and the movable steering column 103 acts as a movable pulley and slides downwards under the action of contraction force.

Preferably, in order to reduce the influence of the pulling force on the front fixed terminal 4, a memory alloy wire fixing device is arranged on the sliding block 1, and the memory alloy wire fixing device comprises a pin block 10 and a clamping part arranged on the sliding block 1. The pin block 10 is fixedly connected with the position of the memory alloy wire 3 close to the end part. As shown in the figure, the memory alloy wire 3 is embedded in the middle of the pin block 10, the clamping portion is plate-shaped and provided with a groove, the pin block 10 is arranged at the front portion of the groove, the memory alloy wire 3 penetrates through the groove, and the pin block 10 and the clamping portion are fixed through the tensioned memory alloy wire 3. Common wires can be used between the pin block 10 and the front fixed terminal 4, and memory alloy wires with redundant lengths can also be arranged between the pin block and the front fixed terminal, so that the normal sliding of the sliding block 1 is not influenced.

Preferably, two steering columns 103 may be provided in order to reduce the tensile force or the space for movement. The memory alloy wire 3 is wound on the two rotating steering columns 103 and the fixed steering column 5 to form an M-shaped broken line. The memory metal wire has a certain expansion ratio, so that the memory alloy wire 3 with a certain length needs to be arranged, the requirement of the expansion ratio can be met, and the action effect of the tensile force can be improved.

Further, in order to reduce the influence of the frictional force and reduce the degree of wear of the memory alloy wire 3, a pulley is provided on the steering column 103 or the steering column 5. Meanwhile, pulleys may be provided to the steering column 103 and the fixed steering column 5 at the same time. In this case, the wear is reduced and the friction is reduced.

Furthermore, the sliding block 1 can be directly connected with the locking block 11, the sliding block 1 can also be directly used as the locking block 11, and meanwhile, a reversing mechanism can be arranged to control the locking block 11 at different positions or in a square shape. At the moment, a shifting block 102 is arranged on the side surface of the sliding block 1, and a rotating cam 9 is arranged on one side, close to the shifting block 102, in the shell;

one side of the rotating cam 9, which is close to the shifting block 102, is provided with two swinging protrusions 901, and the two swinging protrusions are inserted between the two shifting blocks 102; the rotating cam 9 is provided with a driving protrusion 902, and the driving protrusion 902 drives the locking piece 11 to eject or retract.

Further, in order to drive the locking block 11 in different directions, the periphery of the driving protrusion 902 is provided with a spiral sliding groove. The driving protrusion 902 is a protrusion provided outside the rotating cam 9, and may have a fan shape. The spiral sliding groove is arranged on the side surface of the periphery and is a part of a spiral line similar to a spring and arranged on the outer side of the periphery. One surface of the locking block 11 facing the rotating cam 9 is provided with a toggle block 111, and the toggle block 111 is inserted in the spiral chute; during the rotation of the driving protrusion 902, the rotating cam 9 drives the lock piece 11 to slide in the axial direction of the rotating cam 9.

At this time, a lock hole 104 is formed in the housing in a direction corresponding to the sliding direction of the lock block 11. The inner side of the lock hole 104 is provided with a slide pipe or a slide way for installing the lock block 11.

Preferably, the driving protrusion 902 includes a push-out protrusion 9021 and a pull-back protrusion 9022, the push-out protrusion 9021 has a distance in both the axial direction and the circumferential direction of the rotating cam 9, and a spiral sliding groove is formed between the push-out protrusion 9021 and the pull-back protrusion 9022.

Or specifically, as shown in fig. 4, a shifting block 111 is disposed in the middle of the front side surface of the lock block 11, the push-out protrusion 9021 is located at the upper portion of the shifting block 111, the pull-back protrusion 9022 is located at the lower portion of the shifting block 111, the upper portion of the shifting block 111 is an inclined surface, the push-out protrusion 9021 abuts against the inclined surface, when the slider 1 slides backwards, the rotating cam 9 rotates counterclockwise, the push-out protrusion 9021 pushes the lock block 11 downwards through the inclined surface, so that the lock block 11 protrudes out of the housing, and the lock block 11 abuts against the pull-back protrusion 9022. Similarly, when the slider 1 slides forward, the pull-back projection 9022 pulls the lock piece 11 back to the original position and abuts against the push-out projection 9021.

Preferably, in order to protect the overload, a lead terminal is provided on the housing, and a PTC protection module 7 is connected in series between the rear fixing terminal 6 and the lead terminal. Under the normal state, a voltage of 40ms is applied to the memory alloy wire 3, and if the voltage is too high or the duration is too long, the PTC protection module 7 can play a protection role.

Preferably, in order to fix the rear fixing terminal 6, the rear fixing terminal 6 is sheet-shaped, the end part of the rear fixing terminal is provided with a fixing end of the memory alloy wire 3, the rear fixing terminal 6 is abutted against or fixedly connected with the inner side wall of the shell, the PTC protection module 7 is arranged on one side of the rear fixing terminal 6, a spring is arranged between the rear fixing terminal 6 and the PTC protection module 7, and the spring realizes abutting and fixing effects so as to ensure the stability of the rear fixing terminal 6 and the PTC protection module 7.

Furthermore, the above functions can realize the door lock function, but the control function of the main loop control power supply cannot be realized, so that a control switch needs to be arranged in the door lock structure, and in the main loop connected in series with the control switch, after the door lock structure is locked, the main loop of the power supply is conducted, thereby ensuring the safety.

To achieve this function, a main circuit control contact, which is a position switch, may be provided inside the housing. The position switch can be a travel switch or an inductive switch, can be arranged at a position close to the slide block or the rotating cam 9, and when the slide block slides to enable the locking block 11 to be in a locking state, the position switch is triggered, and a main contact of the position switch is connected in series in a main loop. At the moment, only after the door lock is closed, the main loop can be conducted, and the safety is improved.

Further, the main loop control contact comprises a U-shaped conductive strip. The case is provided with lead terminals including a current supply terminal 16, a common terminal 17, and a control terminal 18. The energizing terminal 16 is electrically connected to the rear fixed terminal 6, or the energizing terminal 16 is electrically connected to the rear fixed terminal 6 via the PTC protection module 7.

The closed end of the U-shaped conductive plate is electrically and fixedly connected with the common terminal 17, and the open end of the U-shaped conductive plate can move freely, in this embodiment, the second movable terminal 142 is linked with the lower part of the lock block 11, and the moving direction of the end of the U-shaped conductive plate is the same as the axial direction of the rotating cam 9.

The two sides of the opening end of the U-shaped conductive sheet are respectively a first movable terminal 141 and a second movable terminal 142. The front fixed terminal 4 is installed on the terminal fixing seat 41, and the terminal fixing seat 41 is fixedly connected with the inner wall of the shell. As shown in fig. 2, the front fixed terminal 4 is a horizontally disposed conductive pillar, and terminal fixing seats 41 are disposed on two sides of the conductive pillar to define or fix the first movable terminal 141. Alternatively, the first movable terminal 141 is directly electrically connected to the front fixed terminal 4.

The upper part of the second movable terminal 142 is fixedly connected with the bottom of the locking block 11. The lower part of the locking piece 11 is provided with a stationary contact 13 which is fixedly connected with the housing and electrically connected with a control terminal 18.

A movable contact 12 is arranged on the second movable terminal 142 corresponding to the position of the fixed contact 13; when the sliding block 1 drives the locking block 11 to slide out of the shell, the moving contact and the static contact are combined. At the moment, when the sliding block controls the door lock to be locked, the movable contact 12 and the fixed contact 13 are combined, the movable contact 12 and the fixed contact 13 are connected in series in the main loop, and the main loop is conducted after the door lock is closed.

The working principle is as follows:

from the open to the locked state, a pulse voltage of 40ms is applied to the energizing terminal 16 and the common terminal 17. In the open state, the slide block 1 is positioned at the rear part, after the power is on, the slide block 1 slides backwards to unlock the swing steel wire 2 from the locking chute 101, the slide block slides forwards under the action of the return spring and is locked to the locking position at the front part, at the moment, the locking block 11 moves downwards and the end part of the locking block stretches out of the shell to realize the locking function, simultaneously, the movable contact 12 and the fixed contact 13 are closed, and the main circuit is conducted. After the main loop is conducted, the washing machine obtains a working power supply and enters a working state. The power-on terminal 16 is connected with the live wire of the commercial power, and the common terminal 17 is connected with the zero line of the commercial power. Meanwhile, the common terminal 17 serves as a common point and 18 to form a switch, the control terminal 18 is electrically connected with the fixed contact 13, and the movable contact 12 is electrically connected with the common terminal 17, so that the locking of the door lock can be guaranteed, the door lock can be switched on when locked, a main loop is not electrified when the door lock is opened, and the injury to a user due to abnormal starting cannot be caused. When the locked state is switched to the open state, a pulse voltage is applied to the energizing terminal 16 and the common terminal 17, and at this time, the slider 1 slides backward again to unlock the swing wire 2 from the lock chute 101, and moves downward to another lock position and then is held in the rear lock position.

In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and various changes and modifications can be made by workers in the field without departing from the technical spirit of the present invention. The technical scope of the present invention is not limited to the content of the specification, and all the equivalent changes and modifications of the shape, structure, characteristics and spirit according to the scope of the present invention should be included in the scope of the claims of the present invention.

Claims (10)

1. A switch box, includes casing, locking piece (11), its characterized in that:

a slide way (105) is arranged in the shell, a slide block (1) is arranged on the slide way (105) in a sliding manner, a locking slide groove (101) is arranged on the slide block (1), and the locking slide groove (101) is a one-way rotating double-locking-point track groove; the bottom surface of the sliding block (1) is provided with a rotating steering column (103); the sliding block (1) drives the locking block (11) to slide;

the upper part of the sliding block (1) is provided with a swinging steel wire (2), the swinging steel wire (2) is U-shaped, one end of the swinging steel wire (2) is fixedly connected with a shell on the upper part of the sliding block (1), and the other end of the swinging steel wire is abutted to the locking sliding groove (101);

a fixed steering column (5), a front fixed terminal (4) and a rear fixed terminal (6) are arranged behind the sliding block (1), and the front fixed terminal (4) and the rear fixed terminal (6) are positioned in front of and behind the fixed steering column (5); the memory alloy wire (3) is wound on the fixed steering column (5) and the movable steering column (103), and two ends of the memory alloy wire (3) are fixedly and electrically connected with the front fixed terminal (4) and the rear fixed terminal (6); a memory alloy wire fixing device is arranged on the sliding block (1), and the memory alloy wire fixing device fixes the memory alloy wire (3) on the sliding block (1);

the memory alloy wire (3) pulls the sliding block (1) backwards after being electrified, and a return spring for driving the sliding block (1) to be pulled forwards is arranged between the sliding block (1) and the shell.

2. A switch box according to claim 1, characterized in that:

memory alloy silk fixing device includes pin piece (10) and the joint portion of setting on slider (1), position fixed connection that pin piece (10) and memory alloy silk (3) are close to the tip, pin piece (10) joint is on joint portion.

3. A switch box according to claim 1, characterized in that:

pulleys are sleeved on the upper parts of the movable steering column (103) and/or the fixed steering column (5).

4. A switch box according to any one of claims 1-3, characterized in that:

a shifting block (102) is arranged on the side surface of the sliding block (1), and a rotating cam (9) is arranged on one side, close to the shifting block (102), in the shell;

one side, close to the shifting block (102), of the rotating cam (9) is provided with two swinging protrusions (901), and the two shifting blocks (102) are inserted between the two shifting blocks (102); the rotating cam (9) is provided with a driving protrusion (902), and the driving protrusion (902) drives the locking block (11) to pop up or retract.

5. A switch box according to claim 4, characterized in that:

the number of the rotating steering columns (103) is two.

6. A switch box according to claim 5, characterized in that:

the shell is provided with a lead terminal, and a PTC protection module (7) is connected between the rear fixed terminal (6) and the lead terminal in series.

7. A switch box according to claim 5 or 6, characterized in that:

a spiral chute is formed in the periphery of the driving protrusion (902), a poking block (111) is arranged on one surface, facing the rotating cam (9), of the locking block (11), and the poking block (111) is inserted into the spiral chute; the rotating cam (9) drives the locking block (11) to slide in the axial direction of the rotating cam (9);

the shell is provided with a lock hole (104) corresponding to the sliding direction of the lock block (11).

8. A switch box according to claim 5 or 6, characterized in that:

the driving protrusion (902) comprises a push-out protrusion (9021) and a pull-back protrusion (9022), the push-out protrusion (9021) is provided with a distance in the axial direction and the circumferential direction of the rotating cam (9), and a spiral sliding groove is formed between the push-out protrusion (9021) and the pull-back protrusion (9022).

9. A switch box according to claim 6, characterized in that:

also comprises a main loop control contact, the lead terminals comprise a power-on terminal (16), a common terminal (17) and a control terminal (18),

the electrified terminal (16) is electrically connected with the rear fixed terminal (6), or the electrified terminal (16) is electrically connected with the rear fixed terminal (6) through the PTC protection module (7);

the main loop control contact comprises a U-shaped conducting strip, the closed end of the U-shaped conducting strip is electrically connected and fixedly connected with a common terminal (17), and the moving direction of the open end of the U-shaped conducting strip is the same as the axial direction of the rotating cam (9);

the two sides of the opening end of the U-shaped conducting strip are respectively provided with a first movable terminal (141) and a second movable terminal (142); the front fixed terminal (4) is arranged on the terminal fixed seat (41), and the first movable terminal (141) is electrically connected with the front fixed terminal (4);

the upper part of the second movable terminal (142) is connected with the bottom of the locking block (11);

a static contact (13) is arranged at the lower part of the lock block (11), and the static contact is fixedly connected with the shell and electrically connected with a control terminal (18);

a movable contact (12) is arranged on the second movable terminal (142) corresponding to the position of the fixed contact (13); when the sliding block (1) drives the locking block (11) to slide out of the shell, the moving contact and the static contact are combined.

10. A switch box according to claim 5, characterized in that:

the device comprises a main loop control contact which is a position switch.

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