CN220381950U - Relay and electronic equipment - Google Patents

Abstract

The application provides a relay and electronic equipment, the relay includes: a stationary contact; a moving contact; the rotating mechanism is connected with the moving contact; the transmission mechanism is connected with the rotating mechanism and used for moving the rotating mechanism and the moving contact towards the direction of the fixed contact in response to a first control signal and moving the rotating mechanism and the moving contact away from the direction of the fixed contact in response to a second control signal; the rotating mechanism is used for responding to the moving contact to move in the direction away from the fixed contact, so that the moving contact rotates on the contact surface between the moving contact and the fixed contact. The relay can reduce the probability of relay adhesion.

Description

Relay and electronic equipment

Technical Field

The application relates to the technical field of relays, in particular to a relay and electronic equipment.

Background

The relay is a common electric control device, after a certain voltage is applied to the relay, a moving contact of the relay can move towards a fixed contact to realize closing, and after the voltage is removed, the moving contact of the relay can separate from the fixed contact to realize closing. When the relay is turned off, an arc is generated between the movable contact and the fixed contact, and the arc current in the contact is overlarge, so that fusion welding of alloy materials of the contact can be caused, and the relay adhesion problem is caused.

Disclosure of Invention

An objective of the embodiments of the present application is to provide a relay and an electronic device, which are used for alleviating a problem that relay adhesion may occur when the relay is turned off in the related art.

The embodiment of the application provides a relay, which comprises: a stationary contact; a moving contact; the rotating mechanism is connected with the moving contact; the transmission mechanism is connected with the rotating mechanism and used for moving the rotating mechanism and the moving contact towards the direction of the fixed contact in response to a first control signal and moving the rotating mechanism and the moving contact away from the direction of the fixed contact in response to a second control signal; the rotating mechanism is used for responding to the moving contact to move in the direction away from the fixed contact, so that the moving contact rotates on the contact surface between the moving contact and the fixed contact.

Based on the relay provided by the embodiment of the application, in the process of switching off the relay (namely, in the process that the moving contact moves in the direction away from the fixed contact), the moving contact can rotate on the contact surface between the moving contact and the fixed contact, so that the contact point position of the moving contact and the fixed contact is continuously changed in the switching-off process. The electric arc is generated at the contact point, and when the contact point position of the moving contact and the fixed contact is changed, the electric arc at the original contact point position is extinguished, and the electric arc is generated at the new contact point position again. Then, the contact point position of the movable contact and the fixed contact is continuously changed in the turn-off process, so that the duration time of the electric arc generated each time can be effectively reduced, the damage capability of the electric arc is reduced, and the probability of relay adhesion is reduced.

Further, the surface of the static contact facing one side of the moving contact is an arc-shaped surface.

The magnitude of the current when an arc is generated is related to the cross-sectional area and material of the contact. The smaller the cross-sectional area of the contact, the greater the current that passes after arcing, and thus the greater the probability of relay sticking. In the implementation manner, on one hand, the surface of the fixed contact facing one side of the moving contact is an arc surface, so that the moving contact can conveniently rotate on the contact surface between the fixed contact and the moving contact, and on the other hand, the moving contact can be correspondingly arranged to be in a shape adapting to the arc surface, such as a round shape, a circular shape, a semicircular shape, a polygonal shape and the like, so that compared with the traditional sheet-shaped moving contact, the thickness is thicker, the corresponding sectional area is larger, the current passing efficiency is higher, and the probability of the situation of relay adhesion is lower.

Further, the section of the moving contact is one of the following: circular, annular, semi-circular, semi-annular, and polygonal.

In the implementation mode, the movable contact is one of a circle, a circular ring, a semicircle ring, a polygon and the like, so that compared with the traditional sheet-shaped movable contact, the sectional area is larger, the current passing efficiency is higher, and the probability of the relay adhesion is lower.

Further, the relay further comprises a roller; the movable contact is fixedly arranged on the roller; the rotating mechanism is rotatably connected with the moving contact through the roller.

In the implementation mode, the roller is arranged to drive the moving contact to rotate, so that the moving contact can be arranged smaller, the cost is reduced, and the moving contact is also convenient to replace after being damaged.

Further, the roller acts as an armature in the relay.

In the implementation manner, the roller is used as the armature in the relay, so that the armature does not need to be arranged separately, and the cost of the relay can be reduced.

Further, the movable contact is made of a nonmetallic conductive material.

In the implementation manner, compared with the traditional metal conductive material, the non-metal conductive material is not easy to generate fusion welding, so that the probability of relay adhesion can be further reduced.

Further, the movable contact is made of graphene.

Graphene is a nonmetallic conductive material with good conductivity, and has high stability, and the melting point is as high as more than three thousand DEG C, so that fusion welding is not easy to occur, and the probability of relay adhesion can be further reduced.

Further, the rotating mechanism comprises a rotating plate and a torsion spring; the rotating piece is rotatably connected with the transmission mechanism through the torsion spring; the rotating piece is rotatably connected with the moving contact.

In the above implementation manner, by arranging the rotating piece and the torsion spring, when the transmission mechanism moves the rotating mechanism and the moving contact towards the direction of the fixed contact, the torsion spring is compressed after the moving contact contacts the fixed contact, so that the rotating piece is driven to shift, and the moving contact rotates on the contact surface between the rotating piece and the fixed contact. Correspondingly, when the transmission mechanism moves the rotating mechanism and the moving contact to a direction far away from the fixed contact, the torsion spring releases elasticity, so that the rotating piece is driven to shift, and the moving contact rotates on a contact surface between the rotating piece and the fixed contact. Through the implementation mode, the moving contact can be easily rotated on the contact surface between the moving contact and the fixed contact, and the structure is simple, so that the implementation is facilitated.

Further, the rotating mechanism comprises a connecting piece and a motor; the connecting piece is fixedly connected with the movable contact and is rotatably connected with the transmission mechanism; the motor is connected with the connecting piece.

In the implementation mode, through the arrangement of the motor, the moving contact can rotate on the contact surface between the moving contact and the fixed contact, and the same structure is simple and beneficial to implementation.

The embodiment of the application also provides electronic equipment, which comprises the relay of any one of the above.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments of the present application will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application, and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings for a person having ordinary skill in the art.

Fig. 1 is a schematic structural diagram of a relay according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a comparison of a circular cross section, a semicircular cross section and a sheet-like cross section provided in an embodiment of the present application;

FIG. 3 is a schematic diagram showing a comparison of a circular cross section, a semi-circular cross section and a sheet-like cross section according to an embodiment of the present application;

fig. 4 is a schematic diagram of an assembly position among a roller, a moving contact and a fixed contact according to an embodiment of the present application;

FIG. 5 is a schematic illustration of an alternative transmission mechanism provided in an embodiment of the present application;

fig. 6 is a schematic view of a relay structure with another transmission mechanism according to an embodiment of the present disclosure;

fig. 7 is a schematic view of a relay structure according to an embodiment of the present application.

Detailed Description

The technical solutions in the embodiments of the present application will be described below with reference to the drawings in the embodiments of the present application.

In order to alleviate the problem that relay adhesion probably appears when the relay is turned off, provided a relay in this application embodiment, it is through the mode that constantly changes the contact point position between moving contact and the stationary contact at relay turn-off in-process, reduces the duration of electric arc, reduces the destructive power of electric arc to reach the purpose that reduces the probability of the condition of appearance relay adhesion.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a relay provided in an embodiment of the present application, including: the device comprises a fixed contact 1, a moving contact 2, a rotating mechanism 3 and a transmission mechanism 4.

Wherein the rotating mechanism 3 is connected with the moving contact 2. The transmission mechanism 4 is connected with the rotating mechanism 3 and is used for moving the rotating mechanism 3 and the moving contact 2 towards the direction of the fixed contact 1 in response to a first control signal and moving the rotating mechanism 3 and the moving contact 2 away from the fixed contact 1 in response to a second control signal. The rotation mechanism 3 is configured to rotate the moving contact 2 on a contact surface with the fixed contact 1 when the moving contact 2 moves in a direction away from the fixed contact 1.

During the switching-off process of the relay (i.e. during the moving of the moving contact 2 in a direction away from the fixed contact 1), the moving contact 2 rotates on the contact surface with the fixed contact 1, so that the contact point position of the moving contact 2 and the fixed contact 1 is continuously changed during the switching-off process. And the electric arc is generated at the contact point, the contact point position of the movable contact 2 and the fixed contact 1 is changed, the electric arc at the original contact point position is extinguished, and the electric arc is generated at the new contact point position again. The position of the contact point of the movable contact 2 and the fixed contact 1 is continuously changed in the turn-off process, so that the duration of the electric arc generated each time can be effectively reduced, the damage capability of the electric arc is reduced, and the probability of relay adhesion is reduced.

In the embodiment of the application, the fixed contact 1 refers to a contact fixed in a relay, the position of which is not changed, and the moving contact 2 refers to a contact which is contacted with or separated from the fixed contact 1 by the driving of the transmission mechanism 4 in the relay so as to realize the closing or opening of the relay.

In the embodiment of the present application, the stationary contact 1 may be made of a metal conductive material, for example, copper, aluminum or other conductive alloy. In addition, the stationary contact 1 may also be made of a non-metal conductive material, for example, graphene, but not limited thereto.

The movable contact 2 may also be made of a metal conductive material, for example, copper, aluminum or other conductive alloys. Or, the relay can also be made of a non-metal conductive material, for example, graphene can be used for reducing the risk of fusion welding of the moving contact 2, and further reducing the probability of relay adhesion. In addition to the materials listed above, the moving contact may be made of other possible materials.

In this embodiment, as shown in fig. 1, a surface of the fixed contact 1 facing the moving contact 2 may be an arc surface, so that the moving contact 2 rotates on a contact surface with the fixed contact 1.

In the embodiment of the present application, the section of the moving contact 2 may be one of the following: circular, annular, semi-circular, semi-annular, and polygonal.

For example, as shown in fig. 1, the moving contact 2 has a cylindrical shape, and its cross section is a circle or a ring.

In the above-described embodiment, by providing the movable contact 2 to fit the shape of the arc surface, for example, one of a circle, a ring shape, a semicircle, a polygon, etc., it is possible to have a larger sectional area than the conventional sheet-shaped movable contact 2. For example, as shown in fig. 2, in the case where the contact widths are uniform, the thickness of the circular section is equal to the contact width, and the thickness of the semicircular section is equal to 1/2 of the contact width, which is much larger than the conventional sheet-like movable contact 2, and thus has a larger sectional area. For another example, as shown in fig. 3, when the contact width and the upper and lower edge thicknesses are uniform, the cross-sectional area of the circular cross-section is larger than twice the cross-sectional area of the sheet-like moving contact 2, and the cross-sectional area of the semicircular cross-section is also larger than the cross-sectional area of the sheet-like moving contact 2, and thus has a larger cross-sectional area. For another example, for a polygonal interface, such as regular polygons like regular triangles, squares, regular pentagons, etc., the thickness of the contact is also larger than that of the conventional sheet-like movable contact 2 in the case of uniform contact width, so that the contact has a larger cross-sectional area.

The larger the sectional area of the movable contact 2 is, the higher the current passing efficiency is, so that the probability of the relay adhesion is lower.

In the embodiment of the present application, as shown in fig. 4, the relay may further include a roller 5. The moving contact 2 is fixedly arranged on the roller 5, and the rotating mechanism 3 is rotatably connected with the moving contact 2 through the roller 5. Like this, the rotation of gyro wheel 5 just drives moving contact 2 and rotates, can make moving contact 2 set up to have aforesaid ring or semicircle ring isoperimetric section, compare in setting up the moving contact of whole cylinder or semicircle cylinder, the cross-section is the required material of moving contact of ring or semicircle ring less, has reduced moving contact 2 and has set up the cost, and also does benefit to the change after moving contact 2 damages.

In the embodiment of the present application, the roller 5 and the moving contact 2 may be fixed by, but not limited to, adhesion, mortise and tenon structure, screws, and the like.

In the embodiment of the present application, the rotatable connection may be, but is not limited to, a connection by a rotating shaft, a sliding rail, or the like. For example, the two parts which are rotatably connected can be respectively sleeved on the same rotating shaft, so that the rotatable connection between the two parts is realized.

In one possible implementation manner of the embodiment of the application, the roller 5 may be made of a material such as soft iron, a magnet, and the like that can be absorbed by the magnet, and the roller 5 may be used as an armature in the relay, so that the armature is not required to be separately arranged in the relay, and the cost of the relay may be reduced.

In another possible implementation of the embodiment of the present application, instead of using the roller 5 as the armature in the relay, a dedicated armature may be separately provided at other positions of the relay while the roller is provided. In this case, the arrangement of the armature may be realized by referring to the arrangement of the armature in each of the relays in the related art.

In one possible implementation of the embodiment of the present application, as shown in fig. 5, the rotation mechanism 3 may include a rotation piece 31 and a torsion spring 32. Wherein the rotating piece 31 is rotatably connected with the transmission mechanism 4 through a torsion spring 32; the rotating piece 31 is rotatably connected with the moving contact 2.

As shown in fig. 5, the torsion spring 32 includes a first spring arm 321 and a second spring arm 322, the first spring arm 321 may be fixed to the transmission mechanism 4, and the second spring arm 322 may be fixed to the rotation piece 31, so that the rotation piece 31 is rotatably connected to the transmission mechanism 4 through the torsion spring 32. When the transmission mechanism 4 moves the rotating mechanism 3 and the moving contact 2 towards the direction of the fixed contact 1, after the moving contact 2 contacts with the fixed contact 1, the torsion spring 32 is compressed, so that the rotating piece 31 is driven to shift, and the moving contact 2 rotates on the contact surface with the fixed contact 1. Accordingly, when the transmission mechanism 4 moves the rotating mechanism 3 and the moving contact 2 away from the fixed contact 1, the torsion spring 32 releases the elastic force, so as to drive the rotating piece 31 to shift, and further, the moving contact 2 rotates on the contact surface with the fixed contact 1.

In one possible implementation of the present embodiment, as shown in fig. 6, the rotation mechanism 3 may include a connection 34 and a motor 33. The connecting piece 34 is fixedly connected with the movable contact 2 and is rotatably connected with the transmission mechanism 4; the motor 33 is connected to the connector 34.

For example, in some relays, a processing unit (e.g., a microprocessor or a single-chip microcomputer, etc.) may be provided to control the transmission mechanism 4. In the above implementation, the motor 33 may be connected to the processing unit, and the processing unit controls the motor 33 to operate while outputting the second control signal, so that the motor 33 can move in response to the moving contact 2 in a direction away from the fixed contact 1 to control the rotation of the connection member, thereby realizing the rotation of the moving contact 2 on the contact surface with the fixed contact 1.

In the embodiment of the application, the transmission mechanism 4 can be realized by adopting the transmission structure of various existing relays.

For example, in the present embodiment, as shown in fig. 7, the transmission mechanism 4 may include a push rod 41, a coil 42, and a magnet 44 disposed above an armature 43. When the relay needs to be closed, a current is output to the coil 42 to generate an electromagnetic induction effect so that the armature 43 carries an electromagnetic force, and the push rod 41 is moved upwards. And the rotating mechanism 3 is connected with the push rod 41, so that the movable contact 2 and the fixed contact 1 are closed. Accordingly, when the relay needs to be turned off, the coil 42 can be stopped from outputting current, and at this time, the electromagnetic force is lost, and the push rod 41 moves down.

It will be appreciated that in the above implementation, the first control signal is the current input to the coil 42, and the second control signal is the current vanishing.

It will be appreciated that in the above implementation, the relay may also have a processing unit therein, and in this case the transmission mechanism 4 may also have a power supply and a switching device, the coil 42 being connected to the power supply via the switching device, and the control end of the switching device being connected to the processing unit. Thus, in case the relay needs to be closed, the processing unit causes the switching device to be closed by outputting a first control signal to the switching device, and the power supply outputs a current to the coil 42. In case the relay needs to be opened, the processing unit causes the switching device to be closed by outputting a second control signal to the switching device, and the power supply outputs a current to the coil 42. The first control signal and the second control signal are the electric signals required by the switching device when the switching device is closed and opened respectively. For example, the switching device may be an NMOS transistor, and the first control signal is a high level signal, and the second control signal is a low level signal. It is understood that the switching device may be a PMOS transistor, a triode, an optocoupler, or the like, in addition to an NMOS transistor, to implement a controlled switching device.

In this embodiment of the present application, as shown in fig. 7, the transmission mechanism may further have a spring 45, where one end of the spring 45 abuts against an inner wall of the relay, and the other end abuts against the push rod 41, so that after the power supply to the coil 42 is stopped, the downward moving process of the push rod 41 is accelerated by the elastic force of the spring 45, so as to accelerate the separation speed of the moving contact and the static contact, further reduce the arc generating duration, and reduce the probability that the relay may adhere when the relay is turned off.

The embodiment provides electronic equipment, which comprises the relay provided by the embodiment of the application.

In this embodiment of the present application, other devices besides the relay may be further included in the electronic device, for example, a battery pack and a load may be further included, where the battery pack is electrically connected to one of the moving contact 2 and the fixed contact 1 of the relay, and the load is electrically connected to the other of the moving contact 2 and the fixed contact 1 of the relay.

In the embodiment of the application, when the battery pack is connected with the moving contact 2, the battery pack can also be used as a power supply source for the coil 42 in the transmission mechanism 4.

In the embodiments provided herein, it should be understood that the connections shown or discussed may be direct or indirect via some device or circuit, whether electrical, mechanical, or otherwise.

Herein, "multiple" means greater than 2.

In this context, the embodiments and the technical features of the embodiments can be combined with each other to obtain new embodiments without conflict.

The foregoing is merely exemplary embodiments of the present application and is not intended to limit the scope of the present application, and various modifications and variations may be suggested to one skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims (10)

1. A relay, comprising:

a stationary contact;

a moving contact;

the rotating mechanism is connected with the moving contact;

the transmission mechanism is connected with the rotating mechanism and used for moving the rotating mechanism and the moving contact towards the direction of the fixed contact in response to a first control signal and moving the rotating mechanism and the moving contact away from the direction of the fixed contact in response to a second control signal;

the rotating mechanism is used for responding to the moving contact to move in the direction away from the fixed contact, so that the moving contact rotates on the contact surface between the moving contact and the fixed contact.

2. The relay according to claim 1, wherein a surface of the stationary contact facing the movable contact is an arc-shaped surface.

3. The relay of claim 1, wherein the moving contact has a cross-section that is one of:

circular, annular, semi-circular, semi-annular, and polygonal.

4. A relay according to any of claims 1-3, wherein the relay further comprises a roller; the movable contact is fixedly arranged on the roller;

the rotating mechanism is rotatably connected with the moving contact through the roller.

5. The relay of claim 4, wherein the roller acts as an armature in the relay.

6. A relay according to any one of claims 1 to 3, wherein the moving contact is made of a non-metallic conductive material.

7. The relay of claim 6, wherein the moving contact is made of graphene.

8. A relay according to any one of claims 1 to 3, wherein the rotation mechanism comprises a rotation plate and a torsion spring;

the rotating piece is rotatably connected with the transmission mechanism through the torsion spring;

the rotating piece is rotatably connected with the moving contact.

9. A relay according to any one of claims 1 to 3, wherein the rotating mechanism comprises a connector and a motor;

the connecting piece is fixedly connected with the movable contact and is rotatably connected with the transmission mechanism;

the motor is connected with the connecting piece.

10. An electronic device comprising a relay according to any one of claims 1-9.