Magnetic blow-out microswitch with double-layer structure

Abstract

A magnetic blow-out microswitch with a double-layer structure belongs to the technical field of electrical switches. The module comprises an upper module unit and a lower module unit which are connected up and down and have the same structure, each of the upper module unit and the lower module unit comprises a substrate and a cover plate which are buckled with each other front and back, fixed contacts are fixed on two sides of the substrate, the fixed contacts are connected with plugging sheets, a guide rod is arranged in the middle of the substrate, and the upper module unit and the lower module unit are connected through the guide rod. A movable contact piece seat is fixed in the middle of the guide rod, grooves are formed in the two sides of the middle of the movable contact piece seat, movable contact pieces are arranged in the grooves in the two sides respectively, the outer ends of the movable contact pieces and the outer sides of the bottom ends of the fixed contact pieces form corresponding contacts, and a guide rod spring is arranged between the inner upper end and the inner lower end of the guide rod in a sleeved mode. And spigot limiting structures are arranged on the two sides, corresponding to the upper end of the guide rod spring, of the base plate and exposed out of the guide rod. According to the utility model, the problem that opening and closing contacts used by customers are not enough can be effectively solved, the transverse installation space is not changed, and the cost is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical switches, and particularly relates to a magnetic blow microswitch with a double-layer structure. Background Art

[0002] The magnetic blow microswitch is a commonly used switch widely applied to the operating mechanisms of various electrical equipment such as high-voltage power transmission and transformation, high-speed railways, etc. It is mainly used as a limit switch, and the magnetic blow microswitch is also an important component of the magnetic blow auxiliary switch and an important part for accurately transmitting the control loop signal. As an important control element for high-voltage switch control and linkage, it plays an extremely important role. However, most of the existing magnetic blow microswitches are single-open or single-close points, and often cannot meet the usage conditions of multiple open and multiple close of customers. Content of the Utility Model

[0003] The utility model aims at the above problems, makes up for the deficiencies of the prior art, and provides a magnetic blow microswitch with a double-layer structure; the utility model can effectively solve the situation that the customer lacks enough opening and closing contacts, and the horizontal installation space remains unchanged, while reducing the cost.

[0004] To achieve the above object, the utility model adopts the following technical solutions.

[0005] The utility model provides a magnetic blow microswitch with a double-layer structure, which is characterized in that it includes two upper module units and lower module units with the same structure connected up and down. The upper module unit and the lower module unit both include a base plate and a cover plate buckled with each other front and back. Fixed on both sides of the base plate are fixed contact pieces, the fixed contact pieces are connected with plug pieces, a guide rod is arranged in the middle of the base plate, a moving contact piece seat is fixed in the middle of the guide rod, grooves are arranged on both sides in the middle of the moving contact piece seat, moving contact pieces are respectively arranged in the two grooves on both sides, the outer ends of the moving contact pieces form corresponding contact points with the outer sides of the bottom ends of the fixed contact pieces, a guide rod spring is sleeved between the upper end and the lower end inside the guide rod, stop limit structures are arranged on both sides of the base plate corresponding to the upper ends of the guide rod spring exposed outside the guide rod. When the guide rod moves upward, the stop limit structures can hold the two sides of the upper end of the guide rod spring. A U-shaped spring is arranged below the moving contact piece seat in the hollow part of the guide rod. The U-shaped spring is arranged on the base plate, hooks are arranged at both ends of the U-shaped spring, and the hooks respectively hook the moving contact pieces at both ends. Cores are arranged on the base plate on the outer sides of the two moving contact pieces. The base plates and the cover plates of the upper module unit and the lower module unit are respectively butted with each other, and the ends of the guide rods of the upper module unit and the lower module unit are in contact with each other.

[0006] Further, the fixed contact piece includes an upper vertical plate structure, a middle inclined plate structure, and a lower L-shaped structure. The insertion piece is an L-shaped structure. The middle inclined plate structure of the fixed contact piece is connected to the insertion piece by a wiring screw. The lower L-shaped structure of the fixed contact piece is the acting part with the moving contact piece.

[0007] Further, an H-shaped opening is provided at the upper part of the guide rod, and a T-shaped opening is provided at the lower part. The moving contact seat is X-shaped. The moving contact seat is installed on the large-head end side of the T-shaped opening at the lower part of the guide rod. The guide rod spring is arranged at the H-shaped opening at the upper part of the guide rod. The upper end of the guide rod spring is sleeved on the middle convex point at the upper end of the H-shaped opening, and both sides thereof protrude from the guide rod and correspond to the stop limit structure. The lower end of the guide rod spring is sleeved on the middle convex point at the lower end of the H-shaped opening.

[0008] Furthermore, the U-shaped spring is located at the small-head end of the T-shaped opening of the guide rod. The hooks provided on the upper sides of both ends of the U-shaped spring are hooked at the opening in the middle of the moving contact piece.

[0009] Further, magnetic core retaining pieces are provided at the positions corresponding to the magnetic core on the cover plate and the substrate, and the magnetic core retaining pieces are in contact with the magnetic core.

[0010] Further, a guide wheel support assembly is also connected to the bottom of the substrate of the lower module unit. The inner side of the guide wheel support assembly contacts the lower end of the guide rod of the lower module unit. After the guide wheel support assembly is pressed upward, it can push against the guide rod of the lower module unit to move upward, and through the guide rod of the lower module unit, push against the guide rod of the upper module unit to move upward.

[0011] Furthermore, the guide wheel support assembly includes an upper support, a lower support, a round pin, a support spring, and a guide wheel. The upper support is fixed to the bottom of the substrate of the lower module unit. The lower support is hinged to the upper support through the round pin and the support spring that bypasses the round pin. The guide wheel is arranged on the lower support. When the lower support is pressed, the lower support can move upward and contact and push against the guide rod of the lower module unit to move upward.

[0012] Advantages of the present utility model.

[0013] With the double-layer structure, the present utility model can enable two pairs of contacts to work simultaneously, effectively solve the situation that the customer lacks enough opening and closing contacts, and keep the installation horizontal space unchanged while reducing the cost. Description of the drawings

[0014] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0016] Figure 2 It is a schematic diagram of the structure at the guide rod of the present utility model.

[0017] Figure 3 It is a schematic external three-dimensional structure diagram of the lower module unit of the present utility model.

[0018] Figure 4 It is a schematic three-dimensional structure diagram of the lower module unit of the present utility model after removing the cover plate and the connecting parts to the guide rod.

[0019] Markings in the figure: 1 is the substrate, 2 is the cover plate, 3 is the fixed contact piece, 4 is the plug-in piece, 5 is the guide rod, 6 is the moving contact piece seat, 7 is the moving contact piece, 8 is the guide rod spring, 9 is the rabbet limit structure, 10 is the U-shaped spring, 11 is the hook, 12 is the magnetic core, 13 is the magnetic core retaining piece, 14 is the upper bracket, 15 is the lower bracket, 16 is the round pin, 17 is the bracket spring, 18 is the guide wheel. Specific embodiments

[0020] As shown in the accompanying drawings, this embodiment provides a double-layer magnetic blow microswitch, which includes two upper module units and lower module units with the same structure connected up and down. The upper module unit and the lower module unit both include a substrate 1 and a cover plate 2 that are buckled with each other front and back. Fixed contact pieces 3 are fixed on both sides of the substrate 1. The fixed contact piece 3 includes an upper vertical plate structure, a middle inclined plate structure, and a lower L-shaped structure. The plug-in piece 4 is an L-shaped structure. The middle inclined plate structure of the fixed contact piece 3 is connected to the plug-in piece 4 through a wiring screw. The lower L-shaped structure of the fixed contact piece 3 is the acting part with the moving contact piece 7.

[0021] A guide rod 5 is arranged in the middle of the substrate 1. The upper part of the guide rod 5 is provided with an H-shaped opening, and the lower part is provided with a T-shaped opening. A moving contact piece seat 6 is fixed in the middle of the guide rod 5. The moving contact piece seat 6 is X-shaped, and the moving contact piece seat 6 is installed on the side of the large head end of the T-shaped opening at the lower part of the guide rod 5.

[0022] Grooves are arranged on both sides in the middle of the moving contact piece seat 6, and moving contact pieces 7 are respectively arranged in the two side grooves. The outer ends of the moving contact pieces 7 form corresponding contact points with the outer sides of the bottom ends of the fixed contact pieces 3.

[0023] A guide rod spring 8 is sleeved between the inner upper end and the inner lower end of the guide rod 5. The guide rod spring 8 is arranged at the H-shaped opening at the upper part of the guide rod 5. Stop limit structures 9 are arranged on both sides of the base plate 1 corresponding to the upper end of the guide rod spring 8 exposed outside the guide rod 5. The upper end of the guide rod spring 8 is sleeved on the convex point in the middle of the upper end of the H-shaped opening and the two sides are exposed from the guide rod 5 and correspond to the stop limit structure 9. The lower end of the guide rod spring 8 is sleeved on the convex point in the middle of the lower end of the H-shaped opening. When the guide rod 5 moves upward, the stop limit structure 9 can support the two sides of the upper end of the guide rod spring 8, prevent the upper end of the guide rod spring 8 from moving upward, and compress the guide rod spring 8 when the guide rod 5 moves upward.

[0024] A U-shaped spring 10 is arranged in the hollow part of the guide rod 5 below the movable contact piece seat 6. The U-shaped spring 10 is located at the small end of the T-shaped opening of the guide rod 5. The U-shaped spring 10 is arranged on the base plate 1. Hooks 11 are arranged at both ends of the U-shaped spring 10. The hooks 11 respectively hook the openings in the middle of the movable contact pieces 7 at both ends. When the guide rod 5 drives the movable contact piece seat 6 to move upward, the inner end of the movable contact piece 7 moves upward, and the U-shaped spring 10 can hook the movable contact piece 7 so that the outer end of the movable contact piece 7 moves downward and contacts with the fixed contact piece 3.

[0025] Magnetic cores 12 are arranged on the substrate 1 outside the two moving contact pieces 7 , and magnetic core blocking pieces 13 are arranged on the cover plate 2 and the substrate 1 at positions corresponding to the magnetic cores 12 , respectively. The magnetic core blocking pieces 13 are connected to the magnetic cores 12 .

[0026] The base plates 1 and the cover plates 2 of the upper module unit and the lower module unit are respectively butted against each other, and the ends of the guide rods 5 of the upper module unit and the lower module unit are in contact with each other.

[0027] A guide wheel 18 bracket assembly is also connected to the bottom of the base plate 1 of the lower module unit, and the inner side of the guide wheel 18 bracket assembly contacts the lower end of the guide rod 5 of the lower module unit. When the guide wheel 18 bracket assembly is pressed upward, it can move upward against the guide rod 5 of the lower module unit, and move upward against the guide rod 5 of the upper module unit through the guide rod 5 of the lower module unit.

[0028] The guide wheel 18 bracket assembly includes an upper bracket 14, a lower bracket 15, a round pin 16, a bracket spring 17, and a guide wheel 18. The upper bracket 14 is fixed to the bottom of the base plate 1 of the lower module unit. The lower bracket 15 is hinged to the upper bracket 14 through the round pin 16 and the bracket spring 17 bypassing the round pin 16. The guide wheel 18 is set on the lower bracket 15. When the lower bracket 15 is pressed, the lower bracket 15 can move up and contact the guide rod 5 of the lower module unit to move up.

[0029] Here’s how it works:

[0030] When the bracket of the guide wheel 18 is extruded by an external force, the guide wheel 18 bracket assembly pushes the guide rods 5 of the lower module unit and the guide rods 5 of the upper module unit to move upward simultaneously, driving the moving contact seat 6 of the upper module unit and the lower module unit to move upward, thereby driving the inner end of the moving contact 7 to move upward. When the moving contact 7 moves to the balance point, the U-shaped spring 10 hooks the outer end of the moving contact 7 and moves downward to contact the fixed contact 3, that is, reaching the trigger point of the microswitch process. At this time, if it continues to move, the normally closed switch will switch from the off state.

[0031] The switch return stroke is after the switch is triggered. When the guide wheel 18 bracket assembly is released, the guide rod 5 moves downward under the action of the guide rod spring 8. When the moving contact seat 6 reaches the balance point again, the outer end of the moving contact 7 moves upward to reset, that is, reaching the trigger point of the microswitch return stroke.

[0032] The up and down movement of the guide rods 5 of the upper module unit and the lower module unit drives the moving contact seat 6 to act, causing the bilateral moving contacts 7 to act to achieve the purpose of cutting off the current. When the bilateral moving contacts 7 act to cut off the current, there are two positions on the left and right, which can evenly share the energy to be released when cutting off the circuit. The damage to the contacts is smaller and the service life is longer. The upper module unit and the lower module unit are pressed against each other, so that the components inside the substrate 1 of the upper module unit and the lower module unit move in the same way, realizing the simultaneous movement of the upper and lower layers, and meeting the requirements of the simultaneous action of double open points or double closed points or single open point and single closed point.

[0033] It can be understood that the above specific description of the present invention is only used to illustrate the present invention and is not limited to the technical solutions described in the embodiments of the present invention. Those of ordinary skill in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as it meets the usage requirements, it is within the protection scope of the present invention.

Claims

1. A magnetic blow microswitch with a double-layer structure, characterized in that, The invention comprises two upper module units and lower module units of the same structure connected in an upper and lower manner, wherein the upper module unit and the lower module unit both comprise a substrate (1) and a cover plate (2) which are mutually buckled in front and back, fixed contact pieces (3) are fixed on both sides of the substrate (1), and the fixed contact pieces (3) are connected to the plug-in piece (4), a guide rod (5) is arranged in the middle of the substrate (1), a movable contact piece seat (6) is fixed in the middle of the guide rod (5), grooves are arranged on both sides of the middle of the movable contact piece seat (6), movable contact pieces (7) are arranged in the grooves on both sides, the outer ends of the movable contact pieces (7) and the outer sides of the bottom ends of the fixed contact pieces (3) form corresponding contacts, a guide rod spring (8) is sleeved between the inner upper end and the inner lower end of the guide rod (5), and the upper end of the substrate (1) corresponding to the guide rod spring (8) is exposed on the guide rod (5) ) are provided with stop limit structures (9) on both sides outside the guide rod (5). When the guide rod (5) moves upward, the stop limit structure (9) can support the two sides of the upper end of the guide rod spring (8). A U-shaped spring (10) is provided in the hollow part of the guide rod (5) below the movable contact piece seat (6). The U-shaped spring (10) is provided on the substrate (1). Hooks (11) are provided at both ends of the U-shaped spring (10). The hooks (11) respectively hook the movable contact pieces (7) at the two ends. Magnetic cores (12) are provided on the substrate (1) on the outer sides of the two movable contact pieces (7). The substrates (1) and the cover plates (2) of the upper module unit and the lower module unit are respectively connected to each other, and the ends of the guide rods (5) of the upper module unit and the lower module unit are in contact with each other.

2. The magnetic blow microswitch with a double-layer structure according to claim 1, characterized in that, The fixed contact piece (3) comprises an upper vertical plate structure, a middle inclined plate structure and a lower L-shaped structure; the plug-in piece (4) is an L-shaped structure; the middle inclined plate structure of the fixed contact piece (3) is connected to the plug-in piece (4) via a connecting screw; and the lower L-shaped structure of the fixed contact piece (3) is an acting part with the moving contact piece (7).

3. A magnetic blow microswitch with a double-layer structure according to claim 1, characterized in that, The guide rod (5) is provided with an H-shaped opening at the top and a T-shaped opening at the bottom. The movable contact piece seat (6) is X-shaped. The movable contact piece seat (6) is mounted on the side of the large end of the T-shaped opening at the bottom of the guide rod (5). The guide rod spring (8) is arranged at the H-shaped opening at the top of the guide rod (5). The upper end of the guide rod spring (8) is sleeved on a convex point in the middle of the upper end of the H-shaped opening and two sides are exposed from the guide rod (5) to correspond to the stop limit structure (9). The lower end of the guide rod spring (8) is sleeved on a convex point in the middle of the lower end of the H-shaped opening.

4. A magnetic blow microswitch with a double-layer structure according to claim 3, characterized in that, The U-shaped spring (10) is located at the small end of the T-shaped opening of the guide rod (5), and the hooks (11) arranged on the upper sides of both ends of the U-shaped spring (10) are hooked at the opening in the middle of the moving contact piece (7).

5. A magnetic blow microswitch with a double-layer structure according to claim 1, characterized in that, A magnetic core stopper (13) is provided at a position corresponding to the magnetic core (12) on the cover plate (2) and the base plate (1), and the magnetic core stopper (13) is connected to the magnetic core (12).

6. The magnetic blow microswitch with a double-layer structure according to claim 1, characterized in that, A guide wheel support assembly is further connected to the bottom of the substrate (1) of the lower module unit. The inner side of the guide wheel support assembly contacts the lower end of the guide rod (5) of the lower module unit. After the guide wheel support assembly is pressed upward, it can push the guide rod (5) of the lower module unit upward, and through the guide rod (5) of the lower module unit, push the guide rod (5) of the upper module unit upward.

7. The magnetic blow microswitch with a double-layer structure according to claim 6, characterized in that, The guide wheel support assembly includes an upper bracket (14), a lower bracket (15), a round pin (16), a bracket spring (17), and a guide wheel (18). The upper bracket (14) is fixed to the bottom of the substrate (1) of the lower module unit. The lower bracket (15) is hinged to the upper bracket (14) through the round pin (16) and the bracket spring (17) that bypasses the round pin (16). The guide wheel (18) is arranged on the lower bracket (15). When the lower bracket (15) is pressed, the lower bracket (15) can move upward and contact and push the guide rod (5) of the lower module unit upward.

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