Quick-action switch with normally-closed end

Abstract

The utility model relates to the technical field of switches for control systems, and discloses a quick-action switch with a normally-closed end, which comprises a back plate, a first fixing plate is fixedly mounted at the bottom of the front side of the back plate, a static contact is fixedly mounted in the first fixing plate, a second fixing plate is fixedly mounted at the top of the front side of the back plate, and the static contact is fixedly mounted in the second fixing plate. And a boss is fixedly mounted at the bottom of the second fixing plate. According to the utility model, through the arrangement of the breaking reed and the position difference between the rectangular block and the connecting block, the moving contact and the static contact are abutted against each other in a default state, so that the switch is always in a communication device, the guide rod is pressed downwards, the position of the rectangular block is changed, the moving contact is further enabled to bounce upwards quickly, and the switch is closed. Compared with a traditional device, the device has the advantages that the switch-on and switch-off functions of the switch can be realized only through one group of the static contact and the moving contact, materials are effectively saved, and the cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the control system switch technical field, more specifically, the utility model relates to a normally closed end's quick -acting switch. BACKGROUND

[0002] As the core component of locomotive various signal feedback and signal control, quick -acting switch plays an indispensable role. It is particularly suitable for low voltage electrical appliance control loop and auxiliary loop, can work stably in complex electrical environment, ensures the accuracy and reliability of signal transmission, in various locomotives, high speed rail, subway and shielded door etc. track transportation field, quick -acting switch is popular because of its excellent performance and wide applicability.

[0003] In the signal system of locomotive and other track transportation equipment, the switch of some positions needs to carry out signal feedback when the switch is closed and opened, to ensure that the system can obtain the switch state in real time, so as to make correct control decision, in order to meet this demand, quick -acting switch needs to have two contacts of normally closed end and normally open end, so as to provide two kinds of signal states at the same time when the switch acts, however, in actual application, the switch of many positions only needs a normally closed end to meet the requirement of signal transmission, and the normally open end is in idle state, this design not only increases the manufacturing cost of switch, but also causes the waste of resources.

[0004] More importantly, because the moving contact and static contact of the switch are pure silver or silver alloy such as noble metal, the idle normally open end contact will cause the waste of resources and increase the manufacturing cost, therefore, a quick -acting switch with only normally closed end is needed. UTILITY MODEL CONTENTS

[0005] In order to overcome the defects of prior art, the utility model provides a normally closed end's quick -acting switch, which has the advantages of only normally closed end and fast on-off.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme: a normally closed end's quick -acting switch, including backplate, the front side bottom of backplate is fixedly installed with first fixed plate, the inside of first fixed plate is fixedly installed with static contact, the front side top of backplate is fixedly installed with second fixed plate, the bottom of second fixed plate is fixedly installed with boss;

[0007] The top of backplate is movably sleeved with guide rod, the bottom of guide rod is fixedly installed with rectangular block, the bottom of rectangular block is fixedly installed with transmission block, the bottom of transmission block is fixedly installed with moving column, the front side bottom of backplate is fixedly installed with support seat, the inside of support seat is movably installed with moving column;

[0008] The inner wall of the back plate is provided with a limiting groove on the left and right sides, a fixed frame is movably installed at the upper and lower ends of the limiting groove, a connecting block is fixedly installed between the two fixed frames, the connecting block is provided with two sides and located at the left and right ends of the fixed frame, a second V-shaped groove is formed at one end of the rectangular block facing the two connecting blocks, a first V-shaped groove is formed at the left and right ends of the rectangular block, the second V-shaped groove and the first V-shaped groove are elastically connected through a break spring, a limiting plate is fixedly installed between the upper fixed frame and the connecting block, the limiting plate is provided with two groups and located at the left and right ends of the fixed frame, and a movable contact is fixedly installed between the lower fixed frame and the connecting block.

[0009] As a preferred technical scheme of the utility model, the arc-shaped grooves are formed at the left and right sides of the support seat, and two break blocks are rotatably installed in the arc-shaped grooves.

[0010] As a preferred technical scheme of the utility model, the left and right ends of the transmission block are provided with protrusions, and the protrusions are located above the two break blocks.

[0011] As a preferred technical scheme of the utility model, the thickness of the break spring is 0.12 mm, the left and right ends of the break spring are stressed after assembly, and the rectangular block and the connecting block compress the break spring.

[0012] As a preferred technical scheme of the utility model, the two movable contacts and the two static contacts abut against each other, and the two limiting plates are located below the protrusions.

[0013] As a preferred technical scheme of the utility model, the support seat is internally provided with a guide groove, the outer wall of the moving column is provided with a guide block, the guide block is movably installed in the guide groove, and the moving column and the support seat are elastically connected through a spring.

[0014] As a preferred technical scheme of the utility model, the distance between the protrusions and the limiting plates is 1.3-1.4 mm.

[0015] Compared with the prior art, the utility model has the beneficial effects as follows:

[0016] The utility model discloses a break spring and a rectangular block and a connecting block are arranged, the movable contact and the static contact abut against each other in the default state, the switch is always in the communication device, the position of the rectangular block is changed by pressing the guide rod downward, the movable contact is quickly popped up upward and abuts against the static contact, compared with the traditional device, the switch closing and opening functions can be realized through the static contact and the movable contact, material is saved, and the cost is reduced. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the guide rod structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the fixed frame structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the moving contact structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the guide groove structure of this utility model.

[0022] In the diagram: 1. Back plate; 2. First fixed plate; 3. Stationary contact; 4. Second fixed plate; 5. Boss; 6. Support base; 7. Guide rod; 8. Rectangular block; 9. Transmission block; 10. Moving column; 11. Spring; 12. Guide block; 13. Guide groove; 14. Arc groove; 15. Breaking block; 16. Limiting groove; 17. Fixed frame; 18. Connecting block; 19. Moving contact; 20. First V-groove; 21. Second V-groove; 22. Breaking spring; 23. Limiting plate. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] like Figures 1 to 5 As shown, this utility model provides a normally closed quick-acting switch, including a back plate 1, a first fixing plate 2 fixedly installed on the bottom front side of the back plate 1, a stationary contact 3 fixedly installed inside the first fixing plate 2, a second fixing plate 4 fixedly installed on the top front side of the back plate 1, and a boss 5 fixedly installed on the bottom of the second fixing plate 4.

[0025] A guide rod 7 is movably sleeved on the top of the back plate 1. A rectangular block 8 is fixedly installed at the bottom of the guide rod 7. A transmission block 9 is fixedly installed at the bottom of the rectangular block 8. A moving column 10 is fixedly installed at the bottom of the transmission block 9. A support seat 6 is fixedly installed at the bottom of the front side of the back plate 1. The moving column 10 is movably installed inside the support seat 6.

[0026] The inner wall of the back plate 1 is provided with a limiting groove 16 on the left and right sides, the upper and lower ends of the limiting groove 16 are movably provided with a fixed frame 17, the upper and lower groups of fixed frames 17 are fixedly provided with a connecting block 18, the connecting block 18 has two sides and is located at the left and right ends of the fixed frame 17, one end of the two groups of connecting blocks 18 facing the rectangular block 8 is provided with a second V-shaped groove 21, the left and right ends of the rectangular block 8 are provided with a first V-shaped groove 20, the second V-shaped groove 21 and the first V-shaped groove 20 are elastically connected through a broken spring piece 22, the upper fixed frame 17 and the connecting block 18 are fixedly provided with a limiting plate 23, the limiting plate 23 has two groups and is located at the left and right ends of the fixed frame 17, and the lower fixed frame 17 and the connecting block 18 are fixedly provided with a moving contact 19, the moving contact 19 has two groups and is located at the left and right ends of the fixed frame 17.

[0027] After the device is assembled, in the default state, the spring 11 elastically supports the guide rod 7 because the moving column 10 and the supporting seat 6 are elastically connected through the spring 11, and at this time the height of the rectangular block 8 is higher than that of the connecting block 18, further, the broken spring piece 22 is in an inclined state because the rectangular block 8 and the connecting block 18 are elastically connected through the broken spring piece 22, and the broken spring piece 22 always gives the connecting block 18 a downward force, at this time the moving contact 19 at the bottom of the connecting block 18 and the static contact 3 abut each other, the limiting plate 23 and the boss 5 are separated, the switch is in a conducting state, and the force applied to the connecting block 18 by the broken spring piece 22 makes the moving contact 19 in a stable state, ensuring the stability of the switch, when it is necessary to close the switch, the worker presses the guide rod 7 downward, further the guide rod 7 drives the rectangular block 8, the transmission block 9 and the moving column 10 to displace downward, so that the spring 11 is compressed, as the rectangular block 8 continues to displace downward, the broken spring piece 22 gradually recovers from the inclined state to the horizontal state, and because the linear distance between the connecting block 18 and the rectangular block 8 becomes shorter, the left and right ends of the broken spring piece 22 are further compressed by the rectangular block 8 and the connecting block 18 to accumulate energy, when the height of the rectangular block 8 is lower than that of the connecting block 18, the connecting block 18 quickly displaces upward through the elastic potential energy of the broken spring piece 22, further the connecting block 18 drives the fixed frame 17 to move upward along the limiting groove 16, and the moving contact 19 and the static contact 3 are separated from each other, so that the switch is turned off, completing the switching process from conduction to turn-off, after the worker releases the guide rod 7, the moving column 10 is reset upward along the guide groove 13 through the elastic potential energy of the spring 11, further the rectangular block 8 is reset to a position higher than the connecting block 18, further based on the above principle, the connecting block 18 is reset downward, so that the limiting plate 23 and the boss 5 are separated from each other, and the static contact 3 and the moving contact 19 are in contact, realizing the whole process of the switch.

[0028] By the setting of the breaking spring 22 and the gap of the position of the rectangular block 8 and the connecting block 18, the moving contact 19 and the stationary contact 3 are in abutment with each other in the default state, the switch is connected, and by pressing the guide rod 7 downward, the position of the rectangular block 8 is changed, the moving contact 19 is further quickly popped up, and is separated from the stationary contact 3, compared with the traditional device, the device is always in the connected state in the free state, and the closing and opening functions of the switch can be realized by only one set of stationary contact 3 and moving contact 19, the material is effectively saved, and the cost is reduced.

[0029] Wherein, the left and right sides of the support base 6 are provided with arc-shaped grooves 14, and the inside of the two groups of arc-shaped grooves 14 is rotatably installed with breaking blocks 15, and the rotating shaft of the breaking block 15 is located in the middle of the breaking block 15.

[0030] When the guide rod 7 is pressed downward, the transmission block 9 will be displaced downward synchronously, and the left and right ends of the transmission block 9 will extrude the one end of the two groups of breaking blocks 15 facing the inside during the movement, further making the breaking blocks 15 rotate, at this time, the one end of the breaking blocks 15 facing the outside is raised, and the fixed frame 17 at the bottom is lifted upward, this step is to forcibly lift the fixed frame 17, avoiding the adhesion between the limiting plates 23 on the left and right sides of the fixed frame 17 and the boss 5 caused by the long-time abutment between them, avoiding the jamming of the guide rod 7.

[0031] Wherein, the left and right ends of the transmission block 9 are provided with protrusions, and the protrusions are located above the left and right groups of breaking blocks 15.

[0032] Wherein, the thickness of the breaking spring 22 is 0.12mm, and the left and right ends of the breaking spring 22 are stressed after assembly, and the rectangular block 8 and the connecting block 18 compress the breaking spring 22.

[0033] The force applied to the connecting block 18 by the breaking spring 22 makes the moving contact 19 in a stable state, ensuring the stability of the switch.

[0034] Wherein, the two groups of moving contacts 19 and the two groups of stationary contacts 3 are in abutment with each other, and the two groups of limiting plates 23 are located below the boss 5.

[0035] Wherein, the inside of the support base 6 is provided with a guide groove 13, and the outer wall of the moving column 10 is provided with a guide block 12, the guide block 12 is movably installed in the inside of the guide groove 13, and the moving column 10 and the support base 6 are elastically connected through the spring 11.

[0036] After the staff releases the guide rod 7, the moving column 10 will be reset upward along the guide groove 13 through the elastic potential energy of the spring 11.

[0037] Wherein, the distance between the boss 5 and the limiting plate 23 is 1.3-1.4mm.

[0038] The distance between the boss 5 and the limiting plate 23 is small, facilitating quick starting of the switch.

[0039] The working principle and use process of the utility model are as follows:

[0040] After the device is assembled, in the default state, the spring 11 is elastically supported for the guide rod 7 due to the elastic connection between the moving column 10 and the support base 6, and at this time, the height of the rectangular block 8 is higher than that of the connecting block 18; further, the connecting block 18 is in an inclined state due to the elastic connection between the rectangular block 8 and the connecting block 18 through the disconnecting spring piece 22, and the disconnecting spring piece 22 always gives the connecting block 18 a downward force; at this time, the moving contact 19 at the bottom of the connecting block 18 and the stationary contact 3 abut against each other, the limiting plate 23 is separated from the boss 5, the switch is in a conduction state, and the moving contact 19 is in a stable state due to the force applied to the connecting block 18 by the disconnecting spring piece 22, ensuring the stability of the switch; when it is necessary to close the switch, the worker presses downward the guide rod 7, and further, the guide rod 7 drives the rectangular block 8, the transmission block 9 and the moving column 10 to downwardly displace, so that the spring 11 is compressed; along with the downward displacement of the rectangular block 8, the disconnecting spring piece 22 gradually recovers from the inclined state to the horizontal state, and further, the left and right ends of the disconnecting spring piece 22 are further compressed by the rectangular block 8 and the connecting block 18, and energy is accumulated; when the rectangular block 8 continuously downwardly displaces and the height of the rectangular block 8 is lower than that of the connecting block 18, the connecting block 18 quickly upwardly displaces through the elastic potential energy of the disconnecting spring piece 22, further, the connecting block 18 drives the fixed frame 17 to upwardly along the limiting slot 16, and the moving contact 19 separates from the stationary contact 3, so that the switch is turned off, and the switching process from conduction to turn-off is completed; after the worker releases the guide rod 7, the moving column 10 is upwardly reset along the guide slot 13 through the elastic potential energy of the spring 11, further, the rectangular block 8 is reset to a position higher than the connecting block 18, and further, based on the above principle, the connecting block 18 is downwardly reset, so that the limiting plate 23 and the boss 5 are separated from each other, and the stationary contact 3 and the moving contact 19 are in contact, realizing the whole process of the switch.

[0041] It should be noted that, in the present document, the terms“first”,“second”, etc. are used merely to differentiate one entity or action from another, and do not necessarily require or imply any actual relationship or order between such entities or actions. Also, the terms“include”,“comprise” or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or device including a list of elements does not only include those elements, but also includes other elements not explicitly listed, or inherent to such process, method, article or device.

[0042] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A normally closed snap action switch comprising a back plate (1) characterised in that: The front side bottom of the back plate (1) is fixedly installed with a first fixed plate (2), the inside of the first fixed plate (2) is fixedly installed with a static contact (3), the front side top of the back plate (1) is fixedly installed with a second fixed plate (4), the bottom of the second fixed plate (4) is fixedly installed with a boss (5), the top of the back plate (1) is movably sleeved with a guide rod (7), the bottom of the guide rod (7) is fixedly installed with a rectangular block (8), the bottom of the rectangular block (8) is fixedly installed with a transmission block (9), the bottom of the transmission block (9) is fixedly installed with a moving column (10), the front side bottom of the back plate (1) is fixedly installed with a support seat (6), and the moving column (10) is movably installed in the inside of the support seat (6). The left and right sides of the inner wall of the back plate (1) are both provided with a limiting groove (16), the upper and lower ends of the limiting groove (16) are both movably installed with a fixed frame (17), a connecting block (18) is fixedly installed between the two groups of fixed frames (17), the two sides of the connecting block (18) are located at the left and right ends of the fixed frame (17), one end of the two groups of connecting blocks (18) facing the rectangular block (8) is provided with a second V-shaped groove (21), the left and right ends of the rectangular block (8) are both provided with a first V-shaped groove (20), the second V-shaped groove (21) and the first V-shaped groove (20) are elastically connected through a disconnecting spring piece (22), a limiting plate (23) is fixedly installed between the upper fixed frame (17) and the connecting block (18), the two groups of limiting plates (23) are located at the left and right ends of the fixed frame (17), and a dynamic contact (19) is fixedly installed between the lower fixed frame (17) and the connecting block (18).

2. A normally closed snap action switch according to claim 1, characterised in that: The left and right sides of the support seat (6) are both provided with an arc-shaped groove (14), and the two groups of arc-shaped grooves (14) are rotatably installed with a disconnecting block (15), and the rotating shaft of the disconnecting block (15) is located in the middle of the disconnecting block (15).

3. A normally closed snap action switch according to claim 1, wherein: The left and right ends of the transmission block (9) are provided with protruding blocks, and the protruding blocks are located above the two groups of disconnecting blocks (15).

4. A normally closed snap action switch according to claim 1, wherein: The thickness of the disconnecting spring piece (22) is 0.12mm, the left and right ends of the disconnecting spring piece (22) are stressed after assembly, and the rectangular block (8) and the connecting block (18) compress the disconnecting spring piece (22).

5. A normally closed snap action switch according to claim 1, wherein: The two groups of dynamic contacts (19) and the two groups of static contacts (3) abut against each other, and the two groups of limiting plates (23) are located below the boss (5).

6. A normally closed snap action switch according to claim 1, wherein: The inside of the support seat (6) is provided with a guide groove (13), the outer wall of the moving column (10) is provided with a guide block (12), the guide block (12) is movably installed in the inside of the guide groove (13), and the moving column (10) and the support seat (6) are elastically connected through a spring (11).

7. A normally closed snap action switch according to claim 1, wherein: The distance between the boss (5) and the limiting plate (23) is 1.3-1.4mm.

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