Large-gap relay

Abstract

The invention discloses a large-gap relay, which comprises a shell, a coil, magnetic steel, a movable arm, a pushing sheet, a first conductive strip, a second conductive strip and a movable contact spring, and is characterized in that the first conductive strip and the second conductive strip are fixed on the shell, and part of each of the first conductive strip and the second conductive strip extends into the shell; the second conductive strip is fixed with a movable contact spring located in the shell, the movable contact spring is located below the first conductive strip, a static contact is arranged on the lower end face of the first conductive strip, and a movable contact matched with the static contact is arranged on the upper end face of the movable contact spring; the magnetic steel is matched with the movable arm, and the magnetic steel and the pushing piece are close to the two opposite inner side walls of the shell respectively, so that the pushing piece driven by the movable arm can have a large stroke, and the movable contact spring driven by the pushing piece can be greatly bent; therefore, a large gap can be kept when the movable contact and the static contact are separated, and the use safety of the relay is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, in particular to the technical field of large gap relays. Background Art

[0002] In recent years, with the rapid development of the electronic information industry, relays as basic components have been widely used in the fields of automation control such as home appliances, communications, automobiles, instruments and meters, machinery and equipment, aerospace, etc. Recent statistics show that among electronic component products, relays have become the largest product in terms of annual sales. The existing relays have a small gap between the moving contact and the static contact ports. When the voltage is high, they are prone to automatic attraction or gap breakdown, which is not safe to use. Summary of the invention

[0003] The purpose of the present invention is to solve the problems in the prior art and to provide a large gap relay, which can make the moving contact and the static contact of the relay have a larger gap when they are separated, and is safer to use.

[0004] To achieve the above-mentioned purpose, the present invention proposes a large gap relay, including a housing, a coil, a magnet, a movable arm, a push piece, a first conductive strip, a second conductive strip, and a movable reed. The housing is fixed with the first conductive strip and the second conductive strip, and a portion of the first conductive strip and the second conductive strip extends into the housing. The second conductive strip is fixed to a movable reed located inside the housing, and the movable reed is located below the first conductive strip. A static contact is provided on the lower end surface of the first conductive strip, and a movable contact matching the static contact is provided on the upper end surface of the movable reed. A horizontally arranged coil is provided inside the housing, and a magnet is installed inside the housing, and the magnet is located above the coil. A rotating shaft passes through the center of the magnet, which is perpendicular to the central axis of the coil and is fixed inside the shell. The magnet rotates around the rotating shaft, and the N pole and S pole of the magnet are respectively located at the upper and lower ends of the magnet. Magnetic conductive sheets are fixed at both ends of the coil, and second limit blocks are provided on the mutually close sides of the magnetic conductive sheets. Two first limit blocks distributed up and down are provided on the two side walls of the magnet close to the magnetic conductive sheets, and the second limit block is located between the two first limit blocks on the same side of the magnet. A movable arm is fixed on the magnet, and the end of the movable arm is connected to a vertically arranged push sheet, which is connected to the moving spring sheet, and the magnet and the push sheet are respectively close to two opposite inner side walls of the shell.

[0005] Preferably, a vertically arranged guide groove is provided inside the shell, the lower part of the push piece is inserted into the guide groove, a limit plate is provided on the movable spring piece, the limit plate and the inner wall of the shell form a limit gap, and the push piece passes through the limit gap.

[0006] Preferably, a first plug hole is provided on the push plate, and the end of the movable arm is an insertion head, which is inserted into the first plug hole, and the length of the insertion head in the vertical direction is smaller than the length of the first plug hole in the vertical direction.

[0007] Preferably, a second socket is provided on the push plate, an elastic sheet is fixed at the bottom of the moving spring sheet, the spring end of the elastic sheet automatically tilts downward, the end of the moving spring sheet and the elastic sheet are inserted into the second socket, and when the static contact and the moving contact are in contact, the bottom wall of the second socket presses against the elastic sheet and the elastic sheet is in an upwardly pressed state.

[0008] Preferably, there are two static contacts and two moving contacts, and the static contacts and the moving contacts correspond to each other one by one. A separation groove is provided on the moving spring, which opens at the end of the moving spring and passes through the upper and lower ends of the moving spring. The length direction of the separation groove is the same as the length direction of the moving spring, and the two moving contacts are respectively located on both sides of the separation groove.

[0009] Preferably, the second conductive strip is located below the first guide strip, the movable spring is located between the first conductive strip and the second conductive strip, and portions of the first conductive strip and the second conductive strip located outside the housing are located on the same side of the housing.

[0010] Preferably, when the static contact and the movable contact are in contact, the second conductive bar and the movable arm are in a crossed state, and a avoidance area for avoiding the movable arm is provided on the second conductive bar.

[0011] Beneficial effects of the present invention: The present invention matches the magnetic steel and the movable arm, and the magnetic steel and the push piece are respectively close to the two opposite inner walls of the shell, so that the push piece driven by the movable arm can have a larger stroke, and then the movable spring piece driven by the push piece can bend greatly, so that the moving contact and the static contact can maintain a larger gap when separated, thereby ensuring the safety of the relay; the second conductive strip and the movable arm are cross-arranged, so that the relay structure is compact and has a smaller volume.

[0012] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a front view of the closed state of the large gap relay of the present invention; Figure 2 It is a schematic diagram of a moving spring of a large gap relay of the present invention; Figure 3 It is a front view of the open state of the large gap relay of the present invention; Figure 4 is a cross-sectional view of a first jack of a large gap relay of the present invention; Figure 5 It is an exploded view of the large gap relay of the present invention.

[0014] In the figure: 1-housing, 2-first conductive strip, 3-second conductive strip, 4-moving spring, 5-magnetic steel, 6-pushing sheet, 10-coil, 11-second limit block, 12-guide groove, 15-magnetic conductive sheet, 20-static contact, 40-moving contact, 41-separation groove, 42-limiting plate, 45-elastic sheet, 50-rotating shaft, 51-first limit block, 52-movable arm, 53-insertion head, 61-first jack, 62-second jack. DETAILED DESCRIPTION

[0015] Embodiment 1: See also Figure 1 and Figure 3 The large gap relay of the present invention comprises a housing 1, a coil 10, a magnetic steel 5, a movable arm 52, a push piece 6, a first conductive strip 2, a second conductive strip 3, and a movable spring piece 4. The housing 1 is fixed with the first conductive strip 2 and the second conductive strip 3. Parts of the first conductive strip 2 and the second conductive strip 3 extend into the housing 1. The second conductive strip 3 is fixed to a movable spring piece 4 located inside the housing 1. The movable spring piece 4 is located below the first conductive strip 2. The lower end surface of the first conductive strip 2 is provided with a static contact 20, and the upper end surface of the movable spring piece 4 is provided with a movable contact 40 that matches the static contact 20.

[0016] A horizontally arranged coil 10 is provided inside the shell 1. A magnet 5 is installed inside the shell 1. The magnet 5 is located above the coil 10. A rotating shaft 50 passes through the center of the magnet 5. The rotating shaft 50 is perpendicular to the central axis of the coil 10. The rotating shaft 50 is fixed inside the shell 1. The magnet 5 rotates around the rotating shaft 50. The N pole and S pole of the magnet 5 are respectively located at the upper and lower ends of the magnet 5. Magnetic conductive sheets 15 are fixed at both ends of the coil 10. Second limit blocks 11 are provided on the sides of the magnetic conductive sheets 15 that are close to each other. Two first limit blocks 51 distributed up and down are provided on the two side walls of the magnet 5 that are close to the magnetic conductive sheet 15. The second limit block 11 is located between the two first limit blocks 51 on the same side of the magnet 5.

[0017] A movable arm 52 is fixed on the magnetic steel 5 , and the end of the movable arm 52 is connected to a vertically arranged push piece 6 , and the push piece 6 is connected to the movable spring piece 4 .

[0018] In order to ensure that the length of the movable wall 52 is longer and thus the stroke of the push piece 6 is larger, the magnet 5 and the push piece 6 are respectively close to the two opposite inner walls of the outer shell 1, specifically, the magnet 5 and the push piece 6 are distributed close to the right inner wall and the left inner wall of the outer shell 1.

[0019] In order to ensure that the push piece 6 moves vertically, a vertically arranged guide groove 12 is provided inside the shell 1, and the lower part of the push piece 6 is inserted into the guide groove 12. A limit plate 42 is provided on the movable spring piece 4, and the limit plate 42 and the inner wall of the shell 1 form a limit gap, and the push piece 6 passes through the limit gap.

[0020] See also Figure 4 A first plug hole 61 is provided on the push sheet 6, and an insertion head 53 is provided at the end of the movable arm 52. The insertion head 53 is inserted into the first plug hole 61, and the length of the insertion head 53 in the vertical direction is smaller than the length of the first plug hole 61 in the vertical direction.

[0021] In order to provide an upward thrust to the moving contact 40 when the moving contact 40 and the static contact 20 are attracted, and ensure the reliability of the attraction of the moving contact 40 and the static contact 20, a second plug hole 62 is provided on the push sheet 6, and an elastic sheet 45 is fixed to the bottom of the moving reed 4. The elastic sheet 45 tilts downward at the end of the automatic reed 4, and the end of the moving reed 4 and the elastic sheet 45 are inserted into the second plug hole 62. When the static contact 20 and the moving contact 40 are in contact, the bottom wall of the second plug hole 62 presses against the elastic sheet 45 and the elastic sheet 45 is in an upwardly pressed state.

[0022] Embodiment 2: See also Figure 2 In order to ensure that each static contact 20 and the corresponding moving contact 40 can be effectively attracted and reduce the contact resistance, there are two static contacts 20 and two moving contacts 40, and the static contacts 20 and the moving contacts 40 correspond to each other. A separation groove 41 is provided on the moving spring 4. The separation groove 41 opens at the end of the moving spring 4 and passes through the upper and lower ends of the moving spring 4. The length direction of the separation groove 41 is the same as the length direction of the moving spring 4. The two moving contacts 40 are respectively located on both sides of the separation groove 41. At this time, the two moving contacts 20 are relatively independent and the two are in a parallel structure. The repulsive force generated when the corresponding static contacts 20 and the moving contacts 40 are in contact will not affect the attraction of the other set of static contacts 20 and the moving contacts 40. The structure is simple and reliable.

[0023] Embodiment three: See also Figure 1 In order to prevent the moving contact 40 and the static contact 20 from being easily separated after being attracted, the second conductive bar 3 is located below the first guide bar, the moving spring 4 is located between the first conductive bar 2 and the second conductive bar 3, and the parts of the first conductive bar 2 and the second conductive bar 3 located outside the housing 1 are both located on the same side of the housing 1.

[0024] When the moving contact 40 and the stationary contact 20 are attracted, the current direction between the second conductive strip 3 and the moving reed 4 will generate a repulsive force between the second conductive strip 3 and the moving reed 4, and the repulsive force will generate an upward thrust on the moving reed 4, making it difficult for the moving contact 40 and the stationary contact 20 to separate after being attracted.

[0025] Embodiment 4: In order to make the structure of the relay more compact and the relay have a smaller volume, on the basis of the third embodiment, when the static contact 20 and the movable contact 40 are in contact, the second conductive bar 3 and the movable arm 52 are in a crossed state, and an avoidance area for avoiding the movable arm 52 is provided on the second conductive bar 3.

[0026] Working process of the present invention: During operation of the large gap relay of the present invention, when the coil 10 is energized to make the magnet 5 rotate clockwise, the movable arm 52 also rotates clockwise. When the movable arm 52 rotates clockwise, it drives the push piece 6 to move upward, and the push piece 6 drives the movable spring piece 4 to move. When the magnet 5 rotates a certain angle, the first limit block 51 on the magnet 5 will be resisted by the second limit block 11. At this time, the magnet 5 stops rotating. At this position, the moving contact 40 is tightly fitted with the static contact 20, and the first conductive strip 2 and the second conductive strip 3 are in a conducting state.

[0027] When the coil 10 is energized to make the magnet 5 rotate counterclockwise, the movable arm 52 also rotates counterclockwise. When the movable arm 52 rotates counterclockwise, it drives the push piece 6 to move downward, and the push piece 6 drives the movable spring piece 4 to move. The moving contact 40 is separated from the static contact 20. At this time, the first conductive strip 2 and the second conductive strip 3 are in an open circuit state. When the magnet 5 rotates a certain angle, the first limit block 51 on the magnet 5 will be resisted by the second limit block 11, and the magnet 5 stops rotating.

[0028] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention belongs to the protection scope of the present invention.

Claims

1. Large gap relay, characterized by: The invention comprises a housing (1), a coil (10), a magnetic steel (5), a movable arm (52), a push piece (6), a first conductive strip (2), a second conductive strip (3), and a movable spring piece (4). The housing (1) is fixed with the first conductive strip (2) and the second conductive strip (3). Parts of the first conductive strip (2) and the second conductive strip (3) extend into the housing (1). The second conductive strip (3) is fixed to a movable spring piece (4) located inside the housing (1). The movable spring piece (4) is located below the first conductive strip (2). A static contact point (20) is provided on the lower end surface of the first conductive strip (2). A movable contact point (40) matching with the static contact point (20) is provided on the upper end surface of the movable spring piece (4). A horizontally arranged coil (10) is provided inside the housing (1). A magnetic steel (5) is installed inside the housing (1). The magnetic steel (5) is located above the coil (10). A rotating shaft is passed through the center of the magnetic steel (5). (50), the rotating shaft (50) is perpendicular to the central axis of the coil (10), the rotating shaft (50) is fixed inside the housing (1), the magnet (5) rotates around the rotating shaft (50), the N pole and the S pole of the magnet (5) are respectively located at the upper and lower ends of the magnet (5), the two ends of the coil (10) are fixed with magnetic conductive sheets (15), the sides of the magnetic conductive sheets (15) close to each other are provided with second limit blocks (11), two side walls of the magnetic conductive sheets (5) close to the magnetic conductive sheets (15) are each provided with two first limit blocks (51) distributed up and down, the second limit block (11) is located between the two first limit blocks (51) on the same side of the magnetic steel (5), a movable arm (52) is fixed on the magnetic steel (5), the end of the movable arm (52) is connected to a vertically arranged push sheet (6), the push sheet (6) is connected to the movable spring sheet (4), the magnetic steel (5) and the push sheet (6) are respectively close to two opposite inner side walls of the housing (1).

2. The large gap relay according to claim 1, characterized in that: A vertically arranged guide groove (12) is provided inside the housing (1), and the lower part of the push piece (6) is inserted into the guide groove (12). A limit plate (42) is provided on the movable spring piece (4), and the limit plate (42) and the inner wall of the housing (1) form a limit gap, and the push piece (6) passes through the limit gap.

3. The large gap relay according to claim 1, characterized in that: The push plate (6) is provided with a first insertion hole (61), the end of the movable arm (52) is an insertion head (53), the insertion head (53) is inserted into the first insertion hole (61), and the length of the insertion head (53) in the vertical direction is smaller than the length of the first insertion hole (61) in the vertical direction.

4. The large gap relay according to claim 1, characterized in that: The push plate (6) is provided with a second insertion hole (62), an elastic sheet (45) is fixed at the bottom of the movable spring sheet (4), the end of the elastic sheet (45) is tilted downward, the end of the movable spring sheet (4) and the elastic sheet (45) are inserted into the second insertion hole (62), and when the static contact (20) and the movable contact (40) are in contact, the bottom wall of the second insertion hole (62) abuts against the elastic sheet (45) and the elastic sheet (45) is in an upwardly pressed state.

5. The large gap relay according to claim 1, characterized in that: There are two static contacts (20) and two moving contacts (40), and the static contacts (20) and the moving contacts (40) correspond to each other one by one. A separation groove (41) is provided on the moving spring (4), and the separation groove (41) opens at the end of the moving spring (4) and passes through the upper and lower ends of the moving spring (4). The length direction of the separation groove (41) is the same as the length direction of the moving spring (4), and the two moving contacts (40) are respectively located on both sides of the separation groove (41).

6. The large gap relay according to claim 1, characterized in that: The second conductive strip (3) is located below the first guide strip, the movable spring (4) is located between the first conductive strip (2) and the second conductive strip (3), and the portions of the first conductive strip (2) and the second conductive strip (3) located outside the housing (1) are both located on the same side of the housing (1).

7. The large gap relay according to claim 6, characterized in that: When the static contact (20) and the movable contact (40) are in contact, the second conductive strip (3) and the movable arm (52) are in a crossed state, and a clearance area for avoiding the movable arm (52) is provided on the second conductive strip (3).

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