Relay with large-distance switching mechanism

Abstract

A relay with a large-open-distance switching mechanism comprises a relay base, a coil assembly, a magnetic steel assembly, a static assembly and a movable assembly. The static assembly comprises a positive plate and a static contact. The movable assembly comprises a negative plate, a movable spring frame, a movable spring sheet, a movable contact and a flexible piece. The movable spring frame comprises a frame body, a socket, a connecting end, a partition plate, a rotating shaft and a torsional spring. A frame main body is rotatably arranged in the relay base and is connected with the swing arm through a connecting piece. And the rotating shaft is arranged close to one side of the connecting end. When the permanent magnet drives the frame main body to swing along the switch rotating shaft hole, the swing amplitude of the moving contact is larger than the swing amplitude of the connecting end under the same rotating angle, so that a larger opening distance between the moving contact and the static contact can be realized in the same space, and the stability is higher in a power-off state.

Description

Technical Field

[0001] The invention relates to the technical field of magnetic latching relays, in particular to a relay with a large-opening-distance switch mechanism. Background Art

[0002] The magnetic latching relay is a new type of relay developed in recent years, which is used to automatically connect and disconnect the circuit. The normally closed or normally open state of the magnetic latching relay is completely dependent on the action of the permanent magnet, and the conversion of its switch state is completed by triggering a pulse electrical signal of a certain width. Therefore, the magnetic latching relay adopts a bistable structure, relying on the internal permanent magnet to provide suction to maintain the on and off state, and does not require additional energy to maintain the on and closed state. The magnetic latching relay is mainly used in automatic control and remote control occasions, such as smart meters, LED lighting, air conditioners and automobiles.

[0003] The existing magnetic latching relays mainly have the following defects. The opening distance is too small. At present, when this type of relay is turned on, the opening distance between the moving and static contacts is about 1 mm, and most products have an opening distance of 0.8 mm. For switches used for terminal power distribution main circuit control, the national standard has mandatory requirements for contact opening distance and dielectric properties. The existing magnetic latching relays cannot fully meet these requirements due to the small opening distance, and the dielectric properties are poor and do not have isolation function. In particular, after the electrical life or other types of experiments, when the contacts are contaminated, the dielectric properties will further decrease. Due to the limitations of the contact opening distance and dielectric properties, the application scope of this relay is limited. Moreover, due to the limitations of the existing relay structure, it is also very difficult to further increase the opening distance. This existing relay has a complex structure and high process difficulty, which easily leads to poor consistency in product production, resulting in unstable product performance.

[0004] Chinese patent CN204857593U discloses a magnetic latching relay with a large contact opening distance, which includes a rotating mechanism, a stationary magnetic conductor, a moving contact assembly, a stationary contact assembly and a coil. The rotating mechanism rotates due to the force generated by the reverse magnetic field formed by the current passing through the coil. The magnetic latching relay also includes a flexible conductor, which is connected to the moving contact assembly, and the moving contact assembly is directly fixed to the rotating mechanism and forms an integral body with the rotating mechanism.

[0005] The above solution increases the distance between contacts to a certain extent, but the space utilization is low, so the distance is still small, and it cannot effectively prevent the contacts from sticking or failing to disconnect normally, that is, it is still possible to cause failures caused by contact sticking. Summary of the invention

[0006] In view of this, the present invention provides a relay with a large-opening distance switch mechanism to solve the above technical problems.

[0007] A relay with a large-opening switch mechanism, comprising a relay base, a static component arranged in the relay base, and a dynamic component arranged in the relay base, wherein the static component comprises a positive electrode sheet fixedly arranged at one end in the relay base, and at least one static contact arranged on the positive electrode sheet facing the dynamic component, the dynamic component comprises a negative electrode sheet inserted in the relay base, a dynamic spring frame rotatably arranged in the relay base between the positive electrode sheet and the negative electrode sheet, at least one dynamic spring sheet arranged in the dynamic spring frame, at least one dynamic contact respectively arranged on the end of the dynamic spring sheet facing the static contact, and at least one flexible member respectively connected between the dynamic spring sheet and the negative electrode sheet, wherein one end face of the negative electrode sheet is arranged in close contact with one end face of the relay base and is in contact with the positive electrode sheet. The plates are arranged at intervals, and the dynamic spring frame includes a frame body, a socket arranged on one end of the frame body facing the arc extinguishing assembly, a connecting end arranged on the other end of the frame body, a partition arranged along the long axis of the frame body, two rotating shafts respectively arranged on the end surfaces on both sides of the partition, and two torsion springs respectively sleeved on the two rotating shafts, the dynamic spring plate passes through the socket and is located between the positive plate and the negative plate, the two rotating shafts are arranged on one side close to the connecting end, the distance between the central axis of the rotating shaft and the connecting end is smaller than the distance between the central axis of the rotating shaft to the moving contact, one end of the torsion spring abuts on the frame body, and the other end abuts on the dynamic spring plate, and the torsion spring is used to fix the relative position between the dynamic spring plate and the socket and to provide abutting force for the static contact and the moving contact.

[0008] Furthermore, the relay base includes a base body, a coil mounting portion arranged in the base body, a magnetic shaft hole arranged on one side of the coil mounting portion, and a switch shaft hole arranged on the side of the magnetic shaft hole away from the coil mounting portion.

[0009] Furthermore, the coil base is provided with a coil assembly and a magnetic steel assembly located on one side of the coil assembly.

[0010] Furthermore, the coil assembly includes a coil frame embedded in the coil mounting portion, an electromagnetic coil wound on the coil frame, and two yokes arranged on both sides of the coil frame.

[0011] Furthermore, the coil assembly includes a coil frame embedded in the coil mounting portion, an electromagnetic coil wound on the coil frame, and two yokes arranged on both sides of the coil frame.

[0012] Furthermore, the magnetic steel assembly includes a permanent magnet rotatably disposed in the magnetic steel shaft hole, and a swing arm disposed on a side of the permanent magnet facing away from the arc extinguishing assembly.

[0013] Furthermore, the end of the positive electrode sheet provided with the static contact is arranged close to the yoke, and one end of the positive electrode sheet extends to the outside of the relay base.

[0014] Furthermore, the negative electrode sheet and the positive electrode sheet are arranged parallel to each other.

[0015] Furthermore, the connecting end is movably connected to the swing arm via a connecting piece.

[0016] Furthermore, one end of the torsion spring abuts against the movable spring frame, and the other end abuts against an end surface of the movable spring sheet close to the rotating shaft.

[0017] Furthermore, a rotating shaft is rotatably disposed in the relay base.

[0018] Compared with the prior art, the relay with a large-opening distance switch mechanism provided by the present invention is provided with a frame body rotatably arranged in the relay base, and a connecting end is arranged on one side of the frame body, which is connected to the swing arm through a connecting piece. The rotating shaft is arranged close to one side of the connecting end. When the permanent magnet drives the frame body to swing along the switch rotating shaft hole, the swing amplitude of the moving contact is much larger than the swing amplitude of the connecting end at the same distance between the positive electrode sheet and the negative electrode sheet and at the same rotation angle, thereby achieving a larger opening distance between the moving contact and the static contact in the same space, thereby preventing the contacts from sticking or failing to disconnect normally as much as possible, and avoiding failures caused by contact sticking. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic structural diagram of a relay with a large-opening-distance switch mechanism provided by the present invention.

[0020] Figure 2 for Figure 1 Schematic diagram of the structure of the moving component of a relay with a large-opening switching mechanism.

[0021] Figure 3 for Figure 2 A schematic structural diagram of the dynamic component from another perspective.

[0022] Figure 4 for Figure 2 A schematic structural diagram of a dynamic spring frame having a dynamic component.

[0023] Figure 5 for Figure 1A structural schematic diagram of a relay base of a relay with a large-opening distance switching mechanism. DETAILED DESCRIPTION

[0024] The specific embodiments of the present invention are further described in detail below. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0025] like Figures 1 to 5 As shown, it is a schematic diagram of the structure of a relay with a wide-opening switch mechanism provided by the present invention. The relay with a wide-opening switch mechanism includes a relay base 10, a coil assembly 20 arranged in the relay base 10, a magnetic steel assembly 30 arranged in the relay base 10 and located on one side of the coil assembly 20, a static assembly 40 arranged in the relay base 10, and a dynamic assembly 50 arranged in the relay base 10. It can be imagined that the relay with a wide-opening switch mechanism also includes some other functional structures, such as wiring terminals, fixing components, assembly components, etc., which are well known to those skilled in the art and will not be repeated here.

[0026] See also Figure 5 The relay base 10 includes a base body 11, a coil mounting portion 12 disposed in the base body 11, a magnetic steel shaft hole 13 disposed on one side of the coil mounting portion 12, and a switch shaft hole 14 disposed on the side of the magnetic steel shaft hole 13 away from the coil mounting portion 12. The relay base 10 is a common workpiece in the relay industry, so it is not described here. The coil mounting portion 12 is used to assemble the coil assembly 20, the magnetic steel shaft hole 13 is used to assemble the magnetic steel assembly 30, and the switch shaft hole 14 is used to assemble the following movable spring frame 52 in the movable assembly 50, which will be described in detail below.

[0027] The coil assembly 20 includes a coil frame 21 embedded in the coil mounting portion 12, an electromagnetic coil 22 wound around the coil frame 21, and two yokes 23 arranged on both sides of the coil frame 21. The coil frame 21 is connected to an external device to energize the electromagnetic coil 22, so that positive and negative poles are generated at both ends of the electromagnetic coil 22. After being energized, the electromagnetic coil 22 generates a magnetic field that interacts with the magnetic steel assembly 30, so that the magnetic steel assembly 30 rotates. The two yokes 23 are L-shaped and symmetrically arranged on both sides of the magnetic steel shaft hole 13, so that the magnetic steel shaft hole 13 is located between the two yokes 23.

[0028] See also Figure 5The magnetic steel assembly 30 includes a permanent magnet 31 rotatably arranged in the magnetic steel shaft hole 13, and a swing arm 32 arranged on the side of the permanent magnet 31 facing away from the static assembly 40. The permanent magnet 31 interacts with the electromagnetic coil 22 and rotates around the magnetic steel shaft hole 13. When the permanent magnet 31 rotates to a certain angle, it will collide with the yoke 23 to avoid excessive rotation and contact with the electromagnetic coil 22.

[0029] The swing arm 32 is connected to one end of the moving component 50 , and drives the moving component 50 through the force generated by the interaction of the magnetic field between the permanent magnet 31 and the electromagnetic coil 22 , which will be described below in conjunction with the moving component 50 .

[0030] The static component 40 and the dynamic component 50 are combined to form a switch mechanism, and include a positive electrode sheet 41 with one end fixedly disposed in the relay base 10, and at least one static contact 42 disposed on the end of the positive electrode sheet 41 facing the dynamic component 20. The end of the positive electrode sheet 41 provided with the static contact 42 is disposed close to the yoke 23, and one end of the positive electrode sheet 41 extends to the outside of the relay base 10 to connect to an electrical device. The number of the static contacts 42 is set according to actual needs. In this embodiment, two are provided. The static contact 42 is used in conjunction with the dynamic component 50, and will be described below in conjunction with the dynamic component 50.

[0031] The moving assembly 50 includes a negative electrode sheet 51 inserted in the relay base 10, a moving spring frame 52 rotatably arranged in the relay base 10 between the positive electrode sheet 41 and the negative electrode sheet 51, two moving spring sheets 53 arranged in the moving spring frame 52, two moving contacts 54 respectively arranged on the ends of the two moving spring sheets 53 facing the static contact 42, and two flexible parts 55 respectively connecting the moving spring sheets 53 and the negative electrode sheet 51.

[0032] One end face of the negative electrode sheet 51 is arranged close to one end face of the relay base 10, and is spaced apart from the positive electrode sheet 41. The negative electrode sheet 51 and the positive electrode sheet 41 are arranged parallel to each other to fit the internal structure of the relay base 10, increase space utilization and provide space for increasing the opening distance of the switch mechanism, and the spacing distance between the positive electrode sheet 41 and the negative electrode sheet 51 in the relay base 10 remains the same. One end of the negative electrode sheet 51 extends to the outside of the relay base 10, and is connected to an electrical device together with the positive electrode sheet 41. It should be noted here that the names of the positive electrode sheet 41 and the negative electrode sheet 51 are only used to distinguish the components, and do not limit the polarity of the external device to which they are connected.

[0033] like Figure 2As shown, the dynamic spring frame 52 includes a frame body 521, a socket 522 arranged on one end of the frame body 521 facing the static component 40, a connecting end 523 arranged on the other end of the frame body 521, a partition 524 arranged along the long axis of the frame body 521, two rotating shafts 525 respectively arranged on the end surfaces on both sides of the partition 524, and two torsion springs 526 respectively mounted on the two rotating shafts 525.

[0034] The connection end 523 and the swing arm 32 can be movably connected through a connection member 56. When the permanent magnet 31 rotates, it can pull the connection end 523 to move, so that the dynamic spring frame 52 rotates around the rotating shaft 525. The partition 524 divides the socket 522 into two independent accommodating spaces. The two dynamic springs 53 are respectively inserted in the socket 522 and placed on both sides of the partition 524. When the two dynamic springs 53 are inserted into the socket 522, one end of the dynamic spring 53 extends and crosses the rotating shaft 525. The ends of the dynamic spring 53 close to the rotating shaft 525 are respectively connected to the flexible member 55, so as to be connected to the negative electrode 51. It can be imagined that the flexible member 55 is a conductive material, such as a copper wire with an insulating outer layer, so that when the dynamic spring 53 moves under the drive of the dynamic spring frame 52, it will not drive the negative electrode 51 to move, that is, the dynamic spring 53 can move independently.

[0035] The two rotating shafts 525 are arranged near one side of the connecting end 523, and the rotating shafts 525 are arranged so that the distance between the central axis of the rotating shaft 525 and 523 is as far smaller as possible than the distance between the central axis of the rotating shaft 525 and the moving contact 54, so that when the connecting end 523 swings at a small angle, the other end of the frame body 521 can have a larger swing range, so that the moving contact 54 can swing along an arc with a larger angle, thereby increasing the opening distance between the moving contact 54 and the static contact 42. Of course, the opening distance can be determined by the distance between the positive electrode sheet 41 and the negative electrode sheet 51, because the moving spring sheet 53 is located between the positive electrode sheet 41 and the negative electrode sheet 51. As we all know, the volume of the relay is constrained and cannot be increased indefinitely. Therefore, how to achieve a large opening distance in a limited space is one of the considerations for measuring the quality of a relay. It is conceivable that the swing amplitude of the moving contact 54 can be changed by changing the spacing distance between the rotating shaft 525 and the connecting end 523 , thereby changing the opening distance between the moving contact 54 and the stationary contact 42 .

[0036] One end of the torsion spring 526 abuts against the movable spring frame 521, and the other end abuts against the end surface of the movable spring piece 53 facing the rotating shaft 525, so as to provide necessary holding force between the movable spring piece 53 and the movable spring frame 52, and also provide sufficient abutting force between the movable contact 54 and the static contact 42. Specifically, when the movable spring piece 53 is inserted into the socket 522, it is difficult for the movable spring piece 53 and the socket 522 to maintain a fixed relative position without external force. Due to the existence of the torsion spring 526, the movable spring piece 43 is pinned in the socket 522, so that it will not move relative to the socket 522.

[0037] When the moving contact 54 and the stationary contact 42 are closed, the permanent magnet 32 ​​pushes the movable spring frame 521 to move toward the stationary contact 42 until the stationary contact 42 abuts against the moving contact 54 . At this time, the permanent magnet 32 ​​continues to push the movable spring frame 521 to move toward the static contact 42, and one side of the socket 522 will contact and squeeze the end face of the movable spring piece 53 facing away from the movable contact 54, so that the end of the movable spring piece 53 provided with the movable contact 54 is bent in the opposite direction, thereby making the two contact surfaces of the movable contact 54 and the static contact 42 tend to be parallel, so that the surface contact between the movable contact 54 and the static contact 42 is increased. At the same time, when the movable spring frame 521 continues to move toward the static contact 42, since the abutment of the torsion spring 526 mounted on the rotating shaft 525 at one end of the movable spring frame 521 will no longer change, the abutment of the torsion spring 526 at one end of the movable spring piece 53 will be further squeezed, so that the movable spring piece 53 can provide a stronger abutment and preload force, further making the two contact surfaces of the movable contact 54 and the static contact 42 tightly abut together to avoid poor contact, thereby improving the quality of the entire relay.

[0038] When in use, the electromagnetic coil 22 is energized to generate a magnetic field, which interacts with the magnetic field of the permanent magnet 31 itself, so that the permanent magnet 31 rotates until it contacts the yoke 23 on one side. The permanent magnet 31 drives the swing arm 32 to swing while rotating, and then drives the connecting end 523 connected to the swing arm 32 to swing. Because the rotating shaft 525 is arranged close to one side of the connecting end 523, after the connecting end 523 swings a certain distance, the swing distance of one end of the moving contact 54 is greater than the swing distance of the connecting end 523, thereby increasing the opening distance between the moving contact 54 and the static contact 42.

[0039] Compared with the prior art, the relay with a large-opening distance switch mechanism provided by the present invention is provided with a frame body 521 rotatably arranged in the relay base 10, and a connecting end 523 is arranged on one side of the frame body 521, which is connected to the swing arm 32 through a connecting piece 56. The rotating shaft 525 is arranged close to one side of the connecting end 523. When the permanent magnet 31 drives the frame body 521 to swing along the switch rotating shaft hole 14, the swing amplitude of the moving contact 54 is much larger than the swing amplitude of the connecting end 523 at the same distance between the positive electrode sheet 41 and the negative electrode sheet 51 and at the same rotation angle, and thus a larger opening distance can be achieved between the moving contact 54 and the static contact 42 in the same space, so that the contact can be prevented from sticking or being unable to disconnect normally as much as possible, and the fault caused by the contact sticking can be avoided.

[0040] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention is included in the scope of the claims of the present invention.

Claims

1. A relay having a large-opening distance switch mechanism, characterized in that: The relay with a large-opening switch mechanism includes a relay base, a static component arranged in the relay base, and a dynamic component arranged in the relay base, the static component includes a positive electrode sheet fixedly arranged in the relay base at one end, and at least one static contact arranged on the positive electrode sheet facing the dynamic component, the dynamic component includes a negative electrode sheet inserted in the relay base, a dynamic spring frame rotatably arranged in the relay base between the positive electrode sheet and the negative electrode sheet, at least one dynamic spring sheet arranged in the dynamic spring frame, at least one dynamic contact respectively arranged on the end of the dynamic spring sheet facing the static contact, and at least one flexible member respectively connected between the dynamic spring sheet and the negative electrode sheet, one end face of the negative electrode sheet is arranged in close contact with one end face of the relay base, and the positive electrode sheet is in contact with the positive electrode sheet. The movable spring frame includes a frame body, a socket arranged on one end of the frame body facing the arc extinguishing assembly, a connecting end arranged on the other end of the frame body, a partition arranged along the long axis of the frame body, two rotating shafts respectively arranged on the end surfaces on both sides of the partition, and two torsion springs respectively sleeved on the two rotating shafts, the movable spring sheet passes through the socket and is located between the positive electrode sheet and the negative electrode sheet, the two rotating shafts are arranged on one side close to the connecting end, the distance between the center axis of the rotating shaft and the connecting end is smaller than the distance between the center axis of the rotating shaft to the moving contact, one end of the torsion spring abuts against the frame body, and the other end abuts against the movable spring sheet, and the torsion spring is used to fix the relative position between the movable spring sheet and the socket and to provide abutting force for the static contact and the moving contact.

2. The relay with a large-opening distance switch mechanism according to claim 1, characterized in that: The relay base includes a base body, a coil mounting portion arranged in the base body, a magnetic steel shaft hole arranged on one side of the coil mounting portion, and a switch shaft hole arranged on a side of the magnetic steel shaft hole away from the coil mounting portion.

3. The relay with a large-opening distance switch mechanism as claimed in claim 2, characterized in that: The coil base is provided with a coil assembly and a magnetic steel assembly located on one side of the coil assembly.

4. The relay with a large-opening distance switch mechanism as claimed in claim 3, characterized in that: The coil assembly comprises a coil frame embedded in the coil mounting portion, an electromagnetic coil wound on the coil frame, and two yokes arranged on both sides of the coil frame.

5. The relay with a large-opening distance switch mechanism according to claim 2, characterized in that: The magnetic steel component includes a permanent magnet rotatably arranged in the magnetic steel rotating shaft hole, and a swing arm arranged on the side of the permanent magnet facing away from the arc extinguishing component.

6. The relay with a large-opening distance switch mechanism according to claim 1, characterized in that: The end of the positive electrode sheet provided with the static contact is arranged close to the yoke, and one end of the positive electrode sheet extends to the outside of the relay base.

7. The relay with a large-opening distance switch mechanism according to claim 1, characterized in that: The negative electrode sheet and the positive electrode sheet are arranged parallel to each other.

8. The relay with a large-opening distance switch mechanism according to claim 6, characterized in that: The connecting end is movably connected to the swing arm via a connecting piece.

9. The relay with a large-opening distance switch mechanism according to claim 1, characterized in that: One end of the torsion spring abuts against the movable spring frame, and the other end abuts against an end surface of the movable spring sheet close to the rotating shaft.

10. The relay with a large-opening distance switch mechanism according to claim 1, characterized in that: One of the rotating shafts is rotatably disposed in the relay base.

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