Screw-in lead terminal and quick switch

Abstract

The application provides a screw type lead-out terminal and a quick-action switch, the screw type lead-out terminal comprising a lead-out end, a screw and a nut; the lead-out end has a lead-out part and a penetrating part which are connected and arranged at an angle, a connecting hole is formed in the lead-out part, the screw passes through the connecting hole and is screwed with the nut to fix the lead-out end; the penetrating part of the lead-out end is provided with a space opening for accommodating the nut. The lead-out end is provided with the space opening to provide space for accommodating the nut, so as to adapt to the cramped internal space of the quick-action switch and other devices, meanwhile, the thread hole of the lead-out end is transferred to the nut to avoid thread slipping or thread production error to cause the lead-out end to be scrapped.

Description

Technical Field

[0001] This invention relates to the field of switch technology, and more specifically, to a screw-type lead-out terminal and a snap-action switch having the screw-type lead-out terminal. Background Technology

[0002] As is well known, electronic components such as relays and low-voltage switches have leads for connecting to external devices. These leads come in various forms, such as screw-type, quick-connect type, PCB type, and wire type. Screw-type leads are widely used in quick-action switches due to their strong resistance to shock and vibration and high connection reliability. Their connection methods to external devices include... Figure 1 As shown, the external device's connection terminal 3 is fixed by the mating connection of screw 2 and lead-out end 1. Existing screw-type lead-out ends generally have two designs, the first being as follows... Figure 2 As shown, it comprises two parts: a screw 4 and a lead-out end 5. The lead-out end 5 has a threaded hole, and the screw 4 and the threaded hole form a mating connection. The advantage of the first type is that it requires less space; the disadvantage is that the thread and the lead-out end are integrated, and if the thread strips or there is a manufacturing error, the entire lead-out end will be scrapped. Furthermore, the lead-out end has silver contacts, making the component expensive. The second type... Figure 3 As shown, it includes three parts: screw 6, lead-out end 8, and nut 7. The threaded holes of screw 6 and nut 7 form a mating connection. The disadvantage of the second type is that the nut requires more space; the advantage is that the thread and lead-out end are separate, so if the thread strips or there is a manufacturing error, the entire lead-out end will not be scrapped. Summary of the Invention

[0003] To address this, the present invention provides a screw-type lead-out terminal and a quick-acting switch having the screw-type lead-out terminal. This screw-type lead-out terminal can adapt to confined internal spaces and reduce the cost of scrapping the lead-out terminal.

[0004] To achieve the above objectives, the technical solution provided by the present invention is as follows:

[0005] A screw-type lead-out terminal includes: a lead-out end, a screw, and a nut; the lead-out end has a lead-out portion and an extension portion that are connected and angled to each other, the lead-out portion has a connecting hole, the screw passes through the connecting hole and is screwed into the nut to fix the lead-out end; the extension portion of the lead-out end has a clearance opening to accommodate the nut.

[0006] Furthermore, the lead-out portion of the lead-out end extends in the direction of the clearance opening and has a support portion for supporting nuts.

[0007] A quick-acting switch includes a housing, a lead-out terminal disposed within the housing, a moving contact corresponding to the lead-out terminal, and a push rod for controlling the movement of the moving contact, wherein the lead-out terminal is a screw-type lead-out terminal as described above.

[0008] Further, the lead-out terminal has a C-shaped structure, comprising a first part, a second part and a third part connected in sequence, the first part and the third part are oppositely arranged, and the second part is connected between the first part and the third part; the first part serves as the lead-out part; the second part and the third part serve as the insertion part; the giving opening is formed on the second part, and the end of the third part is provided with a static contact point corresponding to the dynamic contact point.

[0009] Further, the shell comprises a front shell and a rear shell which are combined, the front shell and the rear shell form a working cavity, the lead-out terminal is fixed between the front shell and the rear shell, the insertion part of the lead-out terminal extends into the working cavity and is provided with a static contact point, and the dynamic contact point and the push rod are arranged in the working cavity.

[0010] Further, the shell is provided with a receiving groove, and the lead-out terminal is fixedly assembled in the receiving groove; the front shell and the rear shell each extend a top block, and the top blocks of the front shell and the rear shell abut the front and rear sides of the nut respectively; the shell is further provided with a retaining wall around the lead-out terminal.

[0011] Further, the front shell and the rear shell have the same structure, and the assembly structure for assembling the lead-out terminal is arranged in left-right symmetry.

[0012] Further, the lead-out terminal and the dynamic contact point have four groups of matched contacts, which are two groups of normally open contacts and two groups of normally closed contacts, and the two groups of normally open contacts and the two groups of normally closed contacts are arranged in left-right symmetry.

[0013] Further, the quick-action switch further comprises a first dynamic spring sheet, a second dynamic spring sheet and a flap, the first dynamic spring sheet and the second dynamic spring sheet are fixed on a fixed frame, the dynamic contact points of the two groups of normally open contacts are arranged at the two ends of the first dynamic spring sheet, the dynamic contact points of the two groups of normally closed contacts are arranged at the two ends of the second dynamic spring sheet, and the middle part of the flap is rotatably arranged on the outer shell, the first end of the flap corresponds to the fixed frame, and the second end of the flap corresponds to the trigger protrusion of the push rod; when the push rod is pressed into place, the trigger protrusion acts on the second end of the flap, and the first end of the flap acts on the fixed frame; finally, the normally closed contacts which are accidentally bonded are separated.

[0014] Further, the front shell and the rear shell are provided with corresponding grooves, the middle part of the flap is provided with a boss, the flap is inserted into the grooves of the front shell and the rear shell through the bosses on both sides of the middle part to realize rotatable arrangement, and the front shell and the rear shell are provided with protrusions around the grooves.

[0015] Further, the front shell and the rear shell are provided with abutting top columns.

[0016] Further, the front shell and the rear shell are provided with corresponding guide posts and guide post holes, the guide posts are inserted into the guide post holes to achieve insertion fixation.

[0017] Further, the front shell and the rear shell are provided with welding structures, and the welding structures are used for welding fixation.

[0018] The technical scheme provided by the application has the following beneficial effects:

[0019] The lead-out end is provided with a space opening to accommodate the nut, so as to adapt to the cramped internal space in the quick-action switch and the like, and the threaded hole of the lead-out end is transferred to the nut to avoid thread slipping or thread production error to cause the lead-out end to be scrapped. The structure is simple and ingenious, and the advantages of the two schemes can be combined without large changes, and the disadvantages of the two schemes can be effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure shows the use of the lead-out terminal in the background art.

[0021] Figure 2 The figure shows the structure of the first lead-out terminal in the background art.

[0022] Figure 3 The figure shows the structure of the second lead-out terminal in the background art.

[0023] Figure 4 The figure shows the structure of the screw type lead-out terminal in the embodiment.

[0024] Figure 5 The figure shows Figure 4 The cross-sectional view of line A-A in the figure.

[0025] Figure 6 The figure shows the exploded view of the structure of the screw type lead-out terminal in the embodiment.

[0026] Figure 7 The figure shows the three-dimensional structure of the lead-out end in the embodiment.

[0027] Figure 8 The figure shows the assembly structure of the screw type lead-out terminal with a support part in the embodiment.

[0028] Figure 9 The figure shows the abnormal structure of the screw type lead-out terminal without a support part in the embodiment.

[0029] Figure 10 The figure shows the appearance of the quick-action switch in the embodiment.

[0030] Figure 11 Fig. 1 shows a structural exploded view of the snap-action switch in an embodiment;

[0031] Figure 12 Fig. 2 shows a schematic view of the internal structure of the snap-action switch in an embodiment in a normal state;

[0032] Figure 13 Fig. 3 shows a schematic view of the internal structure of the snap-action switch in an embodiment when pressed;

[0033] Figure 14 Fig. 4 shows a schematic view of the internal structure of the snap-action switch in an embodiment when pressed to the position;

[0034] Figure 15 Fig. 5 shows a front view of the snap-action switch in an embodiment; part of the internal structure is shown in dotted lines;

[0035] Figure 16 Fig. 6 shows a sectional view along line B-B in an embodiment; Figure 15

[0036] Fig. 7 shows a sectional view along line C-C in an embodiment; Figure 17 Figure 15 Fig. 8 shows a schematic view of part of the internal structure of the snap-action switch in an embodiment;

[0037] Figure 18 Fig. 9 shows a schematic view of the front housing of the snap-action switch in an embodiment;

[0038] Figure 19 Fig. 10 shows a schematic view of the D region in an embodiment;

[0039] Figure 20 Figure 19 Fig. 11 shows a schematic view of the assembly structure of the rocker in an embodiment;

[0040] Figure 21 Fig. 12 shows a schematic view of the structure of the snap-action switch in an embodiment with a top post;

[0041] Figure 22 Fig. 13 shows a schematic view of the structure of the snap-action switch in an embodiment without a top post, which is squeezed and deformed.

[0042] Figure 23 Fig. 14 shows a schematic view of the structure of the snap-action switch in an embodiment without a top post, which is squeezed and deformed. DETAILED DESCRIPTION

[0043] To further illustrate the embodiments, the present application provides accompanying drawings. These drawings are part of the disclosure of the present application, and mainly serve to illustrate the embodiments, and can be used to explain the operating principles of the embodiments in conjunction with the relevant descriptions in the specification. Those of ordinary skill in the art should be able to understand other possible implementations and advantages of the present application in conjunction with these. The components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components. ​​

[0044] The orientation words such as "front", "back", "left", "right" and the like involved in the present embodiment are relative to a reference position, and do not represent the lower position in the use state.

[0045] The present application will be further described in conjunction with the drawings and specific embodiments.

[0046] Referring to Figures 4 to 7 As shown in the drawings, the present embodiment provides a screw type lead-out terminal 10, which comprises a lead-out end 13, a screw 11 and a nut 12; the lead-out end 13 has a lead-out part 131 and a penetrating part 132 which are connected and arranged at an angle, specifically, in the present embodiment, the lead-out end 13 is in a C-shaped structure, comprising a first part, a second part 1321 and a third part 1322 which are connected in sequence, the first part and the third part 1322 are oppositely arranged, the first part is below the third part 1322, and the second part 1321 is connected between the first part and the third part 1322; the first part serves as the lead-out part 131; the second part 1321 and the third part 1322 serve as the penetrating part 132, i.e. the second part 1321 and the third part 1322 are similar to a "Г" shaped structure. The second part 1321 of the penetrating part 132 and the lead-out part 131 (i.e. the first part) are at an angle of 90°. Of course, in other embodiments, the lead-out end 13 is not limited to this, but can also be in an "L" shape, a "Z" shape, etc., and the angle between the penetrating part 132 and the lead-out part 131 can also be selected to be other angles.

[0047] A connecting hole 1303 is formed on the lead-out part 131, the screw 11 passes through the connecting hole 1303 and is screwed with the nut 12 to cooperate, thereby fixing the external connecting terminal; the penetrating part 132 (specifically the second part 1321 of the penetrating part 132 in the present embodiment) of the lead-out end 13 is provided with a clearance opening 1301 for accommodating the nut 12. After assembly, the nut 12 can be accommodated in the clearance opening 1301, so that the lead-out end 13 can accommodate the nut 12 in a small volume, so that the overall volume is effectively controlled; the internal space in the device such as the quick-action switch is adapted, at the same time, the thread hole of the lead-out end 13 is transferred to the nut 12 to avoid thread slipping or thread production error causing the entire lead-out end to be scrapped. It has the characteristics of simple structure, ingenious design, etc.

[0048] Further, in order to prevent the part of the nut 12 beyond the lead-out part 131 from being unable to be effectively supported, causing the nut 12 to be easily deformed and the lead-out end 13 to be unable to be fixed, the penetrating part 132 of the lead-out end 13 is provided with a supporting part 1322, which is arranged at an angle with the penetrating part 132 and the lead-out part 131, and is arranged on the side of the penetrating part 132 away from the lead-out part 131. Figure 9The nut 12 is shown to be twisted; in this embodiment, the extension part 131 of the lead-out terminal 13 extends in the direction of the accommodating opening 1302 and supports the nut 12, so that the part of the nut 12 that exceeds the extension part 131 can also be supported by the supporting part 1302, effectively preventing the nut from being twisted, making the connection more reliable and stable, as shown in Figure 8

[0049] Referring back to Figures 10 to 22 In this embodiment, a quick-action switch is also provided, which comprises a housing 20, a lead-out terminal arranged in the housing 20, movable contacts (the normally-open movable contact 412 and the normally-closed movable contact 422 described below) corresponding to the lead-out terminal, and a push rod 31 for controlling the action of the movable contacts, wherein the lead-out terminal is the screw-type lead-out terminal 10 described above.

[0050] The screw-type lead-out terminal 10 described above is used in the quick-action switch, which can adapt to the cramped internal space of the quick-action switch, without the need to increase the volume of the quick-action switch, making the stability of the quick-action switch better.

[0051] Further, in order to facilitate assembly, the housing 20 comprises a front housing 21 and a rear housing 22 that are combined, and the front housing 21 and the rear housing 22 enclose a working cavity (not shown), so that the lead-out terminal 10 and other components can be pre-fixed on the front housing 21 or the rear housing 22 before being combined, facilitating assembly. The working cavity is used to accommodate the push rod 31 and other components (such as movable contacts) that need to act, i.e., the movable contacts and the push rod 31 are arranged in the working cavity; the lead-out terminal 10 is fixed between the front housing 21 and the rear housing 22; the extension part 132 of the lead-out terminal 10 extends into the working cavity and is provided with stationary contacts (the normally-open stationary contact 411 and the normally-closed stationary contact 421 described below), so that the stationary contacts correspond to the movable contacts.

[0052] An accommodating groove (not shown) is formed on the housing 20, and specifically, the accommodating groove is enclosed by the front housing 21 and the rear housing 22, and the lead-out terminal 10 is fixedly assembled in the accommodating groove, facilitating the assembly of the lead-out terminal 10, and more specifically, facilitating the assembly of the screw 11 in the lead-out terminal 10.

[0053] At the client end, the customer will repeatedly tighten and loosen the screw 11 according to the needs, which is easy to cause the nut 12 to abut against the edge of the opening 1301 of the lead-out terminal 13, causing the lead-out terminal 13 to deform and then causing abnormal contact of the contacts; therefore, in this embodiment, the housing 20 has a top block 203 (as shown in Figure 16 ​The top block 203 is extended from the front shell 21 and the rear shell 22, and the top block 203 of the front shell 21 and the rear shell 22 abuts the front and rear sides of the nut 12 respectively to achieve fixation. Of course, in other embodiments, the top block 203 can limit the left and right sides of the nut 12, or limit the four sides of the nut 12.

[0054] In order to prevent the nut 12 from falling off and being lost when the screw 11 is unscrewed, such as falling out of the accommodation opening 1301 of the lead-out end 13, the housing 20 is further provided with a retaining wall 204 (as shown in the figure) around the lead-out end 10 in the embodiment. Specifically, in the embodiment, because the front and rear sides of the nut 12 are limited by the top block 203, the retaining wall 204 corresponds to the left and right sides of the nut 12 and plays a good limiting role. Of course, in other embodiments, if the top block 203 limits the left and right sides of the nut 12, the retaining wall 204 corresponds to the front and rear sides of the nut 12; if the top block 203 limits the four sides of the nut 12, the structure of the retaining wall 204 can be cancelled, etc. Figure 18

[0055] Specifically, the quick-action switch further includes a first moving spring 34, a second moving spring 35, and a cantilever plate 36. The lead-out end 10 and the moving contact cooperate to form four groups of contacts, two groups of normally open contacts 401 and two groups of normally closed contacts 402. The two groups of normally open contacts 401 and the two groups of normally closed contacts 402 are symmetrically arranged left and right, and the two groups of normally open contacts 401 are located on the left and right sides of the upper side, and the two groups of normally closed contacts 402 are located on the left and right sides of the lower side. As shown in the figure, the definition is as follows: the lead-out end 10 cooperating to form the normally open contact 401 is a normally open lead-out end 101, and the static contact and the moving contact cooperating to form the normally open contact 401 are a normally open static contact 411 and a normally open moving contact 412 respectively; the lead-out end 10 cooperating to form the normally closed contact 402 is a normally closed lead-out end 102, and the static contact and the moving contact cooperating to form the normally closed contact 402 are a normally closed static contact 421 and a normally closed moving contact 422 respectively. Figure 12

[0056] The first moving spring 34 and the second moving spring 35 are fixed on a fixed frame 38, and the moving contacts of the two groups of normally open contacts 401 (i.e. the normally open moving contacts 412) are arranged at the two ends of the first moving spring 34; the moving contacts of the two groups of normally closed contacts 402 (i.e. the normally closed moving contacts 422) are arranged at the two ends of the second moving spring 35.

[0057] The lead-out end 13 of the lead-out end 10 has a C-shaped structure, and the third part 1322 can extend horizontally into the working cavity and is provided with a static contact to realize corresponding moving contacts. The structure is as shown in the figure. Figure 12 ​​As shown; in this way, the C-shaped normally open lead-out terminal 101 can greatly reduce the volume and provide sufficient space for the normally closed lead-out terminal 102 compared to the Z-shaped normally open lead-out terminal disclosed in the sealing structure of a mechanical switch and the mechanical switch with the same disclosed in the application No. 201920015621.5.

[0058] Further, as shown, Figures 12 to 14 As shown, the normally closed lead-out terminal 102 also adopts the C-shaped lead-out terminal 13, which can be well arranged in the space vacated by the normally open lead-out terminal 101 and staggered with the flap 36, so as not to interfere with the flap 36, i.e. the lead-out terminal does not need to be moved downward to avoid the flap 36, which further reduces the height of the closed lead-out terminal 102; in addition, the space occupied by the lead-out terminal in the transverse direction can be saved, the structure is compact, the product height is low, and the product is low. Of course, in other embodiments, even if it is applied to other switches, the C-shaped lead-out terminal 13 can further reduce the overall size and realize the application of small-size switches.

[0059] The push rod 31 is inserted into the working cavity, the middle position thereof is supported by the elastic sheets 32 on both sides, and the bottom position thereof abuts against a spring 33. The side edge of the push rod 31 further protrudes a trigger protrusion 311.

[0060] The middle position of the flap 36 is rotatably arranged on the shell 20, the first end thereof corresponds to a fixed frame 38, and the second end thereof corresponds to the trigger protrusion 311 of the push rod 31, as shown, Figures 12 to 14 As shown, the push rod 31 is pressed downward, the elastic sheets 32 are deformed, the fixed frame 38 is moved upward, the contact points are moved upward, the normally open contact point 401 is closed, and the normally closed contact point 402 is disconnected; at the same time, in order to ensure that the normally closed contact point 402 which is accidentally bonded can be disconnected; when the push rod 31 is pressed to the position, the trigger protrusion 311 acts on the second end of the flap 36, and the first end of the flap 36 acts on the fixed frame 38, so that the fixed frame 38 is moved upward and the contact points are moved upward; finally, the normally closed contact point 402 which is accidentally bonded is forced to separate.

[0061] Further, as shown, Figures 19 to 21As shown, the front housing 21 and the rear housing 22 are provided with corresponding grooves 205. A boss 361 protrudes from the center of the rocker arm 36. The rocker arm 36 is rotatably mounted by inserting the bosses 361 on both sides of its center position into the grooves 205 of the front housing 21 and the rear housing 22. The grooves 205 constrain the bosses 361 on the rocker arm 36, thereby constraining the rocker arm 36 to move within a certain range. Compared to the raised support structure used in existing technologies, such as the rocker arm type contact control switch with application number 201920663418.9, the grooves 205 provide more space for the normally closed lead-out terminal 102, which is more conducive to product miniaturization.

[0062] The front housing 21 and the rear housing 22 have raised ribs 206 around the groove 205. The raised ribs 206 contact the rocker arm 36, avoiding large-area contact and friction between the rocker arm 36 and the outer housing 20. Of course, in other embodiments, the hinge structure of the rocker arm 36 is not limited to this.

[0063] The front housing 21 and the rear housing 22 are provided with abutting top posts 207, such as... Figure 22 As shown, the front housing 21 and the rear housing 22 are interlocked, and the top post 207 is aligned, preventing the outer shell 20 from deforming under external pressure and thus hindering the sliding of the push rod 31. Figure 23 As shown, without the structure of the top column 207, the outer shell 20 is easily deformed inward by external pressure, and the outer shell 20 comes into direct contact with the push rod 31, increasing friction and affecting the movement of the push rod 31. Of course, in other embodiments, other reinforcing structures such as reinforcing ribs can also be used to enhance the resistance of the front shell 21 and the rear shell 22 to extrusion deformation.

[0064] The front housing 21 and the rear housing 22 are provided with corresponding guide posts 202 and guide post holes 201. The guide posts 202 are interference-fitted into the guide post holes 201 for insertion and fixation. Furthermore, for further stability, in this embodiment, the front housing 21 and the rear housing 22 are also provided with a welding structure, and welding fixation is achieved through the welding structure. Figure 15 and Figure 17 As shown, both the front housing 21 and the rear housing 22 are provided with welding strips 37. After the front housing 21 and the rear housing 22 are closed to achieve the insertion and fixation of the guide post 202 and the guide post hole 201, they are fixed by welding using the welding strips 37. More specifically, the welding strips 37 are distributed around the lead-out terminal 10 and have a pointed tip. The pointed tip facilitates the conduction of welding heat, resulting in a better welding effect. Of course, in other embodiments, the fixing structure of the front housing 21 and the rear housing 22 is not limited to this.

[0065] Further, the front shell 21 and the rear shell 22 are the same structure, and the assembly structure (such as the accommodating groove, the top block 203, and the retaining wall 204) for assembling the lead-out terminal 10 is arranged symmetrically left and right. In this way, when the front shell 21 and the rear shell 22 are closed, the assembly structure for assembling the lead-out terminal 10 can also be one-to-one corresponding. Moreover, the top column 207 and the welding structure are also arranged symmetrically left and right. At the same time, as shown in Figure 12 and Figure 19 the same shell (such as the front shell 21, the rear shell 22 is the same) on the guide column 202 and the guide column hole 201 are also symmetrically left and right, the left side of the front shell 21 is provided with the guide column hole 201, and the guide column 202 is arranged at the symmetric position on the right side. In this way, when the front shell 21 and the rear shell 22 are closed, the guide column 202 and the guide column hole 201 can be buckled. It can be understood that: when the front shell 21 and the rear shell 22 are buckled, in addition to the corresponding guide column 202 and guide column hole 201, other structures are mirror-symmetrical structures. In this way, the front shell and the rear shell can be directly molded with a mold, which can save development costs.

[0066] Of course, in other embodiments, the structure of the front shell 21 and the rear shell 22 can also be different.

[0067] The quick-action switch in the embodiment is taken as an example of the cantilever structure to illustrate the application. Of course, in other embodiments, the quick-action switch can also not be limited to the cantilever structure, and can also be applied to the suspended structure disclosed in the application number 201920663221.5, etc.

[0068] Although the application is specifically shown and introduced in combination with the preferred embodiments, it should be understood by those skilled in the art that various changes can be made to the application in form and detail without departing from the spirit and scope of the application defined by the appended claims, and all such changes are within the protection scope of the application.

Claims

1. A screw-out terminal comprising: The utility model discloses a screw type lead-out terminal, which comprises a lead-out terminal, a movable contact, a push rod and a shell.

2. A quick-action switch comprising a housing, a lead-out terminal provided in the housing, a movable contact corresponding to the lead-out terminal, and a push lever for controlling the operation of the movable contact, characterized by: The lead-out terminal is the screw type lead-out terminal of claim 1.

3. The quick break switch of claim 2, wherein: The lead-out terminal of the lead-out terminal is a C-shaped structure, comprising a first part, a second part and a third part connected in sequence, the first part and the third part are oppositely arranged, and the second part is connected between the first part and the third part; the first part serves as the lead-out part; the second part and the third part serve as the extension part; the accommodation opening is formed on the second part, and the static contact is arranged at the end of the third part corresponding to the movable contact.

4. The quick break switch of claim 2, wherein: The shell comprises a front shell and a rear shell which are hinged together, and the front shell and the rear shell enclose a working cavity, the lead-out terminal is fixed between the front shell and the rear shell, the extension part of the lead-out terminal extends into the working cavity and is provided with a static contact, and the movable contact and the push rod are arranged in the working cavity.

5. The quickbreak switch of claim 4 wherein: The shell is provided with a receiving groove, and the lead-out terminal is fixedly assembled in the receiving groove; the front shell and the rear shell each extend a top block which abuts against the front and rear sides of the nut respectively; and the shell is further provided with a retaining wall around the lead-out terminal.

6. The quick break switch of claim 4, wherein: The front shell and the rear shell are identical in structure, and the assembly structure for assembling the lead-out terminal is arranged in left-right symmetry; the lead-out terminal and the movable contact are matched in four groups, which are two groups of normally open contacts and two groups of normally closed contacts arranged in left-right symmetry respectively.

7. The quick break switch of claim 6, wherein: The quick-action switch further comprises a first movable spring plate, a second movable spring plate and a rocker, the first movable spring plate and the second movable spring plate are fixed on a fixed frame, the movable contacts of the two groups of normally open contacts are arranged at the two ends of the first movable spring plate, the movable contacts of the two groups of normally closed contacts are arranged at the two ends of the second movable spring plate, and the middle part of the rocker is rotatably arranged on the outer shell, the first end of the rocker corresponds to the fixed frame, the second end of the rocker corresponds to the trigger protrusion of the push rod, when the push rod is pressed into place, the trigger protrusion acts on the second end of the rocker, thereby driving the first end of the rocker to act on the fixed frame, and finally driving the normally closed contacts which are accidentally bonded to be separated.

8. The quick break switch of claim 7, wherein: The front shell and the rear shell are provided with corresponding grooves, the middle part of the rocker is provided with a boss, the rocker is inserted into the grooves of the front shell and the rear shell through the bosses on both sides of the middle part to realize rotatable arrangement, and the front shell and the rear shell are provided with protrusions around the grooves.

9. A quickbreak switch according to claim 4 or claim 7, wherein: The front shell and the rear shell are provided with abutting top columns; the front shell and the rear shell are provided with corresponding guide columns and guide column holes, the guide columns are inserted into the guide column holes to realize insertion and fixation; the front shell and the rear shell are provided with welding structures and are welded and fixed through the welding structures.

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