WO2018166352A1

WO2018166352A1 - Relay

Info

Publication number: WO2018166352A1
Application number: PCT/CN2018/077697
Authority: WO
Inventors: 邓兵; 蒋红刚; 姚保同; 汪鲁建; 刘斯源
Original assignee: 比亚迪股份有限公司
Priority date: 2017-03-15
Filing date: 2018-03-01
Publication date: 2018-09-20
Also published as: CN206650030U

Abstract

Disclosed is a relay. The relay comprises: a coil; an iron core, the coil being provided outside the iron core; a transmission shaft, wherein a lower end of the transmission shaft is connected to the iron core; first and second binding posts; a moving contact board, wherein the moving contact board is provided at an upper end of the transmission shaft, the moving contact board can be driven by the transmission shaft to move between a first position and a second position, the first and second binding posts are conducting when the moving contact board is at the first position, and an electric connection of the first and second binding posts is disconnected when the moving contact board leaves the first position; a permanent magnet, the permanent magnet being provided on the moving contact board; and a magnetically sensitive switch, wherein the magnetically sensitive switch is located at one side of the permanent magnet, the magnetically sensitive switch is switched from a first state to a second state in the process of the permanent magnet moving from down to up, and the magnetically sensitive switch is switched from the second state to the first state in the process of the permanent magnet moving from up to down. Thus, by means of the principle of magnetic induction, a high-voltage part and a low-voltage part of the relay can be completely separated, and the relay arranged in such a manner has a simple structure.

Description

Relay

The present application claims the priority of the Chinese Patent Application, filed on March 15, 2017, the disclosure of which is hereby incorporated by reference.

Technical field

The application relates to a relay.

Background technique

In the related art, the relay generally has an auxiliary contact, and the opening and conduction of the auxiliary contact can be used to judge the state of the main contact. Some relays on the market generally use the moving iron core to interfere with the magnetic field of the permanent magnet, thereby changing the state of the reed switch, but the relay structure thus arranged is complicated, the winding of the coil is difficult, and the auxiliary contact design occupies a large structure. Space, and the entire electromagnetic excitation loop leakage is more serious.

Application content

The present application aims to solve at least one of the technical problems in the related art to some extent. To this end, the present application proposes a relay that uses the principle of magnetic induction and has a simple structure.

A relay according to the present application, comprising: a coil; an iron core, the coil being disposed outside the iron core, the iron core being movable in an up and down direction under driving of the coil; a drive shaft, the drive shaft The lower end is connected to the iron core, and can be moved up and down under the driving of the iron core; a first binding post, a second binding post; a moving contact plate, the movable contact plate is disposed at an upper end of the transmission shaft, The movable contact plate is movable between the first position and the second position by the driving shaft; when the movable contact plate is in the first position, the first binding post and the second position The terminal is electrically connected, and the first terminal and the second terminal are electrically disconnected when the movable contact plate is apart from the first position; the permanent magnet, the permanent magnet is disposed on the movable contact plate The permanent magnet can be moved in the up and down direction by the movable contact plate; the magnetic sensitive switch is located at one side of the permanent magnet, and the magnetic sensitive switch is located at the permanent magnet Switching from the first state to the second state during the movement up to the top, the magnetic switch is Top-down movement of the magnet is switched from the second state to the first state.

Therefore, according to the relay of the embodiment of the present application, by using the principle of magnetic induction, by changing the position of the permanent magnet, the on-off state of the corresponding magnetic-sensitive switch can be changed, so that the high-voltage portion of the relay can be completely separated from the low-voltage portion. It can effectively prevent the high-voltage circuit of the system from entering the low-voltage circuit, thereby improving the safety of the application system. In addition, the relay thus arranged has a simple structure, the coil is simply wound, the permanent magnet and the magnetic sensitive switch occupy a small space, thereby effectively reducing the volume of the relay, and the relay thus arranged can also reduce the magnetic leakage phenomenon of the electromagnetic excitation circuit.

In some examples of the present application, when the movable touch panel is in the first position, the magnetic sensitive switch is in the first state; when the movable touch panel is away from the first position, the magnetic sensitive The switch is in the second state.

In some examples of the present application, the first state is an on state and the second state is an off state.

In some examples of the present application, the first state is an open state and the second state is a conductive state.

In some examples of the present application, the movable contact plate is provided with a movable contact for contacting or separating from the terminal.

In some examples of the present application, the permanent magnet is disposed at an edge of the moving contact.

In some examples of the present application, the permanent magnet is disposed on a lower surface of the movable contact plate.

In some examples of the present application, the relay further includes: a housing, the movable contact plate, the permanent magnet is disposed in the housing, and the magnetic sensitive switch is disposed on a sidewall of the housing.

In some examples of the present application, when the movable contact plate is in the first position, the permanent magnet and the magnetic sensitive switch are disposed in a horizontal direction.

In some examples of the present application, the permanent magnet is bonded and fixed to the movable contact plate.

In some examples of the present application, both ends of the magnetically sensitive switch are led out with a first end and a second end.

In some examples of the present application, the relay further includes: a limiting member sleeved on the transmission shaft and located in an upward and downward movement direction of the iron core, the iron core and the The drive shaft is movable relative to the limit member.

In some examples of the present application, the relay further includes a reset member that abuts between the limit member and the core to drive the core reset.

In some examples of the present application, the magnetically sensitive switch is a reed switch.

DRAWINGS

1 and 2 are cross-sectional views of a relay according to an embodiment of the present application, respectively;

Figure 3 is an enlarged view of a region A in Figure 2;

4 is a schematic structural view of a relay according to an embodiment of the present application.

Reference mark:

Relay 100;

Coil 1; iron core 2; drive shaft 3; terminal 4; movable contact plate 5; permanent magnet 6;

Magnetic sensitive switch 7; housing 9, limiting member 10; reset member 11.

detailed description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are intended to be illustrative, and are not to be construed as limiting.

The relay 100 according to an embodiment of the present application will be described in detail below with reference to FIGS.

As shown in FIGS. 1 and 2, the relay 100 according to an embodiment of the present application may include a coil 1, a core 2, a drive shaft 3, a terminal 4, a movable contact plate 5, a permanent magnet 6, and a magnetic sensitive switch 7.

The coil 1 is disposed outside the core 2, that is, the core 2 is disposed inside the coil 1, and the core 2 moves axially after the coil 1 is energized. Specifically, the iron core 2 can be moved in the up and down direction by the driving of the coil 1, wherein the axial direction is the up and down direction.

The iron core 2 is fixedly coupled to the lower end of the transmission shaft 3, and the transmission shaft 3 can be moved up and down by the iron core 2. For example, after the coil 1 is energized, the transmission shaft 3 can be moved from the bottom to the top. Moreover, by fixing the iron core 2 to the lower end of the transmission shaft 3, the transmission shaft 3 and the iron core 2 can be properly matched, and the length of the transmission shaft 3 can be made appropriate, thereby ensuring the structural reliability of the relay 100.

The terminal 4 is generally two (positive/negative), that is, a first terminal and a second terminal, and the two terminals 4 shown in FIGS. 1 and 2 are a first terminal and a second terminal.

As shown in FIGS. 1 and 2, the movable contact plate 5 is disposed at the upper end of the transmission shaft 3, and the movable contact plate 5 can be brought into contact with or separated from the terminal 4 by the drive shaft 3. Specifically, the movable contact plate 5 can be moved between the first position and the second position by the driving shaft 3; when the movable contact plate 5 is in the first position, the first binding post and the second binding post pass the moving contact plate 5 is turned on, and when the movable contact plate 5 leaves the first position, the first terminal and the second terminal are disconnected from each other.

Here, the first position is a position capable of turning on the two terminals 4, that is, the top end to which the movable contact plate 5 can move; and the second position is a position at which the two terminals are electrically disconnected, and at this time, The touch panel 5 is away from the terminal 4, and the second position is generally considered to be the lowest end at which the movable contact panel 5 can move.

It should be noted that the first terminal and the second terminal are only turned on when the movable contact plate 5 is in the first position, and the whole process of moving to the second position when the movable contact plate 5 leaves the first position. The first terminal and the second terminal are non-conducting.

As shown in FIGS. 1 and 2, the movable contact plate 5 is disposed at the upper end of the transmission shaft 3, and the movable contact plate 5 can be brought into contact with or separated from the terminal 4 by the drive shaft 3. For example, after the coil 1 is energized, the movable contact plate 5 can be moved from the bottom up until it is electrically connected to the terminal 4, so that the main contact of the relay 100 can be switched from off to on. For another example, after the coil 1 is powered off, the movable contact plate 5 is separated from the terminal 4 by the drive shaft 3 and the iron core 2, so that the main contact of the relay 100 can be switched from on to off.

As shown in FIGS. 1 and 2, the permanent magnet 6 is disposed on the movable contact plate 5, and the permanent magnet 6 can be moved in the vertical direction by the movable contact plate 5. The magnetic sensitive switch 7 is located on one side of the permanent magnet 6, and this side may be any one of the upper, lower, front, rear, left and right sides of the permanent magnet 6. The magnetic sensitive switch 7 is switched from the first state to the second state during the movement of the permanent magnet 6 from bottom to top, and the magnetic sensitive switch 7 is switched from the second state to the first state during the movement of the permanent magnet 6 from top to bottom. . That is to say, the movement of the permanent magnet 6 in the up and down direction can change the on-off state of the magnetic sensitive switch 7, and the difference in the direction of movement can cause the state change of the magnetic sensitive switch 7 to be different. It should be noted that the switching speed and position of the state of the magnetic sensitive switch 7 can be determined by factors such as the magnitude of the current applied to the coil 1 and the permanent magnet 6 and the like, which is not limited herein. Alternatively, the magnetic sensitive switch 7 may be a reed switch.

It should be noted that when the relay 100 is in operation, the movement of the movable contact plate 5 is actually very fast, and the time of one stroke is very short; therefore, as long as the permanent magnet 6 is switched during the movement, the magnetic sensitive switch 7 can be switched. To the role of the auxiliary contacts. Because the time is very short, switching and moving to the top switch during the movement, in fact, the difference is not big, does not affect its function.

Specifically, when the movable touch panel 5 is in the first position, the magnetic sensitive switch 7 is in the first state; when the movable touch panel 5 is away from the first position, the magnetic sensitive switch 7 is in the second state.

Optionally, the first state may be an on state, and the second state may be an off state. That is to say, the magnetic sensitive switch 7 is changed from the conductive state to the open state during the movement of the permanent magnet 6 from bottom to top, and the magnetic sensitive switch 7 is switched from the open state during the movement of the permanent magnet 6 from top to bottom. To the conduction state.

Alternatively, the first state may be an open state and the second state may be a conductive state. That is, the magnetic sensitive switch 7 is switched from the off state to the on state during the movement of the permanent magnet 6 from bottom to top, and the magnetic sensitive switch 7 is switched from the on state during the movement of the permanent magnet 6 from top to bottom. To the disconnected state.

It should be emphasized that the present application drives the opening and closing of the magnetic sensitive switch 7 by changing the distance between the permanent magnet 6 and the magnetic sensitive switch 7, by the influence of the magnetic field of the permanent magnet 6 on the magnetic sensitive switch 7. Specifically, when the permanent magnet 6 is relatively close to the magnetic sensitive switch 7, the action of the magnetic sensitive switch 7 can be driven; and when the permanent magnet 6 is far from the magnetic sensitive switch 7, it is not affected.

The specific magnetic induction principle is as follows: the spacing between the magnetic sensitive switch 7 and the permanent magnet 6 determines the action of the magnetic sensitive switch 7. When the magnetic sensitive switch 7 is located on the left side of the permanent magnet 6 (as shown in FIG. 1), and the movable contact plate 5 is in the first position (ie, the position where the first terminal and the second terminal are electrically connected), the permanent magnet 6 And the magnetic sensitive switch 7 is disposed in the horizontal direction (the "positive setting" here means that the permanent magnet 6 and the magnetic sensitive switch 7 are on the same horizontal line, and the spacing between the two is the entire permanent magnet 6 The minimum position during the movement), the distance between the permanent magnet 6 and the magnetic sensitive switch 7 is the smallest, the magnetic sensitive switch 7 is in the first state; and when the movable contact plate 5 is away from the first position, due to the permanent magnet 6 and the magnetic sensitive switch 7 As the pitch becomes larger, the magnetic sensitive switch 7 changes to the second state. Although it is said that it is located at the first position and the "away" first position, it is a fixed position for the movable contact plate 5. For the permanent magnet 6, due to the nature of the magnetic field itself, the magnetic sensitive switch 7 cannot be completely turned on when the permanent magnet 6 is in one position, and can be immediately disconnected when the permanent magnet 6 leaves a position because the magnetic field It is a gradual process. Therefore, in the present application, in fact, the "located" and "away" first positions have a reasonable error for the influence of the magnetic field, which may be related to the strength of the magnetic field itself, and in this application, This reasonable error is included.

Therefore, according to the relay 100 of the embodiment of the present application, by using the principle of magnetic induction, by changing the position of the permanent magnet 6, the on-off state of the corresponding magnetic-sensitive switch 7 can be changed, while monitoring the on-off state of the relay 100, The high voltage part of the relay 100 is completely separated from the low voltage part, which can effectively prevent the high voltage circuit of the system from entering the low voltage circuit, thereby improving the safety of the application system. In addition, the relay 100 thus disposed has a simple structure, the winding of the coil 1 is simple, and the permanent magnet 6 and the magnetic sensitive switch 7 occupy a small space, so that the volume of the relay 100 can be effectively reduced. Also, the relay 100 thus arranged can also reduce the magnetic flux leakage phenomenon of the electromagnetic excitation circuit.

Optionally, the movable contact plate 5 is provided with a movable contact for contacting or separating from the terminal 4 . Such a movable contact can be reliably contacted with the terminal 4, so that the operational reliability of the relay 100 can be improved.

According to a specific embodiment of the present application, as shown in FIGS. 1 and 2, the permanent magnet 6 may be disposed at the edge of the movable contact plate 5. Thus, the position of the permanent magnet 6 is appropriately arranged, so that the arrangement of the magnetic sensitive switch 7 can be facilitated, the arrangement difficulty of the magnetic sensitive switch 7 can be reduced, and the structural reliability of the relay 100 can be improved.

Optionally, as shown in FIG. 1 and FIG. 2, the permanent magnet 6 is disposed on the lower surface of the movable contact plate 5, so that mutual interference between the permanent magnet 6 and the terminal 4 can be avoided, so that the movable contact plate 5 can be made. The structural arrangement is reasonable, and the structural reliability of the relay 100 can be improved.

Optionally, as shown in FIG. 1 and FIG. 2, the relay 100 may further include: a housing 9, a movable contact plate 5, a permanent magnet 6 disposed in the housing 9, and a magnetic sensitive switch 7 disposed on a side wall of the housing 9. Above, for example, as shown in FIG. 4, the magnetic sensitive switch 7 may be disposed on the outer side wall of the housing 9. Of course, the magnetic sensitive switch 7 can also be disposed on the inner side wall of the housing 9, or the magnetic sensitive switch 7 can also be integrally formed with the side wall of the housing 9. Thereby, the magnetic sensitive switch 7 is appropriately arranged in position, and the magnetic field change of the permanent magnet 6 can be effectively perceived.

Specifically, as shown in FIG. 3, when the movable contact plate 5 is in the first position, the permanent magnet 6 and the magnetic sensitive switch 7 are disposed facing each other in the horizontal direction. This can improve the accuracy of the magnetic sensitive switch 7 sensing the change of the magnetic field of the permanent magnet 6, so that the state of the magnetic sensitive switch 7 can be switched accurately and quickly.

Alternatively, the permanent magnet 6 and the movable contact plate 5 may be bonded and fixed. Thus, the permanent magnet 6 and the movable contact plate 5 are simple in fixing, reliable in fixing, and high in efficiency.

Optionally, both ends of the magnetic sensitive switch 7 are led out with a first end and a second end. Wherein, in a specific use process, the relay 100 can connect the magnetic sensitive switch 7 to the monitoring circuit of the relay 100 through the first end and the second end of the magnetic sensitive switch 7.

According to an optional embodiment of the present application, as shown in FIG. 1 and FIG. 2, the relay 100 may further include: a limiting member 10, the limiting member 10 is sleeved on the transmission shaft 3, and the limiting member 10 is located on the iron core. In the up and down direction of movement 2, the core 2 and the drive shaft 3 are movable relative to the limit member 10. For example, the limiting member 10 can be disposed above the iron core 2. After the coil 1 is energized, the movable contact plate 5 and the terminal 4 are electrically connected, and the limiting member 10 and the iron core 2 can be stopped from each other, so that the limiting member 10 Can achieve its limit. Alternatively, it can be said that after the coil 1 is energized, the limiting member 10 stops the iron core 2, and the movable contact plate 5 and the terminal 4 are electrically connected.

Further, as shown in FIGS. 1 and 2, the relay 100 may further include a reset member 11 that is stopped between the stopper 10 and the core 2 to drive the core 2 to be reset. It can be understood that the reset member 11 has an effect of causing the core 2 to be reset. When the coil 1 is energized, the limiting member 10 can limit the position of the iron core 2. After the coil 1 is powered off, the resetting member 11 can push the iron core 2 to move downward, thereby causing the iron core 2 to return to the initial position. The contact plate 5 and the terminal 4 are disconnected, the permanent magnet 6 is moved away from the magnetic sensitive switch 7, and the magnetic sensitive switch 7 is disconnected.

Specifically, as shown in FIG. 1 and FIG. 2, the reset member 11 may be a spring, and the spring sleeve is sleeved on the drive shaft 3. The retaining member 10 is provided with a receiving groove, and a part of the spring is received in the receiving groove. By providing the accommodating groove, the reliability of the cooperation between the spring and the stopper 10 can be improved, and the internal space of the relay 100 can be effectively saved.

Alternatively, the limiting member 10 may be cylindrical, and the outer diameter of the limiting member 10 is the same as the outer diameter of the iron core 2, and the limiting member 10 is planar toward the surface of the iron core 2. In this way, the limiting member 10 and the iron core 2 can be matched, and the limiting member 10 can better stop the upper surface of the iron core 2, so that the limiting effect of the limiting member 10 can be improved.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the application. In the present specification, the schematic representation of the above terms is not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

While the embodiments of the present application have been shown and described above, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the present application. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A relay characterized by comprising:

Coil

a core, the coil being disposed outside the core, the core being movable in an up and down direction driven by the coil;

a drive shaft, the lower end of the drive shaft is connected to the iron core, and can be moved up and down under the driving of the iron core;

a movable contact plate, the movable contact plate is disposed at an upper end of the transmission shaft, and the movable contact plate is movable between the first position and the second position by the driving shaft;

a first terminal and a second terminal, wherein the first terminal and the second terminal are electrically connected when the movable contact plate is in the first position, and the movable contact plate is away from the first position The first terminal and the second terminal are disconnected from each other;

a permanent magnet, the permanent magnet is disposed on the movable contact plate, and the permanent magnet can be moved in an up and down direction by the movable contact plate;

a magnetic sensitive switch, the magnetic sensitive switch is located at one side of the permanent magnet, and the magnetic sensitive switch is switched from a first state to a second state during a movement of the permanent magnet from bottom to top, the magnetic sensitive switch The second state is switched to the first state during the movement of the permanent magnet from top to bottom.
The relay according to claim 1, wherein said magnetic sensitive switch is in said first state when said movable contact plate is in said first position; said movable contact plate is away from said first position; The magnetic sensitive switch is in the second state.
The relay according to claim 1 or 2, wherein the first state is an on state and the second state is an off state.
The relay according to claim 1 or 2, wherein the first state is an off state and the second state is an on state.
The relay according to any one of claims 1 to 4, characterized in that the movable contact plate is provided with a movable contact for contacting or separating from the terminal.
The relay according to any one of claims 1 to 4, wherein the permanent magnet is disposed at an edge of the movable contact plate.
The relay according to any one of claims 1 to 4, wherein the permanent magnet is disposed on a lower surface of the movable contact plate.
The relay according to any one of claims 1 to 7, further comprising: a housing, the movable contact plate, the permanent magnet are disposed in the housing, and the magnetic sensitive switch is disposed in the On the side wall of the housing.
The relay according to claim 8, wherein said permanent magnet and said magnetic sensitive switch are disposed to face each other in a horizontal direction when said movable contact plate is in the first position.
The relay according to any one of claims 1 to 9, wherein the permanent magnet is bonded and fixed to the movable contact plate.
The relay according to any one of claims 1 to 9, wherein both ends of the magnetic sensitive switch are led out with a first end and a second end.
The relay according to any one of claims 1 to 11, further comprising: a limiting member, the limiting member is sleeved on the transmission shaft and located in an upward and downward movement direction of the iron core The iron core and the transmission shaft are movable relative to the limiting member.
The relay of claim 12, further comprising: a reset member that abuts between the limit member and the core to drive the core reset.
A relay according to any one of claims 1 to 13, wherein the magnetically sensitive switch is a reed switch.