Auxiliary contact system of relay

Abstract

The utility model discloses an auxiliary contact system of a relay, and relates to the technical field of electromagnetic relays, in particular to the auxiliary contact system of the relay, which comprises a base; the auxiliary static spring and the base are fixedly installed, and an auxiliary static contact is arranged in the auxiliary static spring; the auxiliary movable spring and the base are fixedly installed in a cantilever beam mode, and an auxiliary movable contact is arranged at the position, corresponding to the auxiliary static contact, in the free end of the auxiliary movable spring; and the magnetic steel assembly is rotatably installed with the base, a movable end of the magnetic steel assembly is provided with a boss, the boss abuts against the auxiliary movable spring, and when the magnetic steel assembly rotates, the boss can drive the auxiliary movable spring to deform so as to change the contact conduction state of the auxiliary movable contact and the auxiliary static contact. According to the auxiliary contact system of the relay, the magnetic steel assembly is adopted to replace an independent push rod, integration of the push rod and the magnetic steel assembly is achieved, space occupation of an action element is reduced, and miniaturization and compactness of an electromagnetic relay product are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of electromagnetic relays, and more specifically to an auxiliary contact system of a relay. Background Art

[0002] A relay is an electronic control device, usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current, so it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] In the prior art, the internal contacts are operated by a separate push rod, which occupies a large space. However, with the high degree of integration of electrical equipment, the volume requirements of relays are continuously reduced, and the internal space is greatly compressed. There are many restrictive factors in the spatial arrangement of the traditional separate push rod, which gradually increases the design difficulty.

[0004] In summary, how to provide a relay auxiliary contact system that can reduce the space occupied by the internal action elements of the relay, reduce the size of the relay, and reduce the difficulty of relay design is a problem that needs to be urgently solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide an auxiliary contact system of a relay, which adopts a magnetic steel assembly instead of a separate push rod, realizes the integration of the push rod and the magnetic steel assembly, reduces the space occupied by the actuating element, and is conducive to the miniaturization and compactness of the electromagnetic relay product.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An auxiliary contact system of a relay, comprising:

[0008] Pedestal;

[0009] An auxiliary static spring is fixedly mounted on the base and has an auxiliary static contact point arranged inside;

[0010] An auxiliary moving spring is fixedly mounted on the base in the form of a cantilever beam, and an auxiliary moving contact is arranged at a position in the free end corresponding to the auxiliary static contact;

[0011] The magnetic steel component is rotatably mounted with the base, and a boss is provided at the movable end, the boss abuts against the auxiliary dynamic spring, and when the magnetic steel component rotates, the boss can drive the auxiliary dynamic spring to deform to change the contact conduction state of the auxiliary dynamic contact and the auxiliary static contact.

[0012] Preferably, two groups of fixing plates are provided on the side of the base in the form of cantilever beams, the two groups of fixing plates are arranged in parallel, and mounting holes are coaxially provided inside, and a rotating shaft rotatably mounted with the mounting holes is provided inside the magnetic steel assembly.

[0013] Preferably, a guide groove is provided on the surface of the fixing plate for guiding the movement trajectory of the rotating shaft during installation, and the guide groove is connected to the installation hole and the free end of the fixing plate.

[0014] Preferably, the bottom of the guide groove is a wedge-shaped surface, the groove depth at one end close to the mounting hole is smaller than the other end, and the groove width at one end close to the mounting hole is smaller than the other end.

[0015] Preferably, the auxiliary dynamic spring and the auxiliary static spring are located on both sides of the fixed plate with the magnetic steel assembly, the boss passes through the fixed plate, and the boss is an insulator.

[0016] Preferably, a limiting gap is provided in the base, and the boss is inserted into the limiting gap to limit the maximum rotation angle of the magnetic steel assembly.

[0017] Preferably, the surface of the boss is provided with a penetrating slot, and the auxiliary dynamic spring penetrates the slot.

[0018] Preferably, a plurality of mounting grooves are provided in the base for fixing the auxiliary static spring and the auxiliary dynamic spring, and at least two groups of clamping points are provided in the mounting grooves.

[0019] Preferably, the parts of the auxiliary static spring and the auxiliary dynamic spring located in the installation groove are provided with Z-shaped bends, and a matching Z-shaped bending groove is provided in the installation groove.

[0020] Preferably, an elastic support arm is provided in the magnetic steel assembly in the form of a cantilever beam, the length direction of the elastic support arm is perpendicular to the axis of the magnetic steel assembly, and the free end of the elastic support arm abuts against the base.

[0021] Compared with the prior art, the auxiliary contact system of the relay provided by the utility model has at least the following beneficial effects:

[0022] 1. A magnetic steel assembly is used to replace the traditional independent push rod, that is, the magnetic steel assembly integrates the function of the push rod. Through the swing of the magnetic steel assembly, the on-off control of the auxiliary moving contact and the auxiliary static contact is realized, thereby effectively reducing the internal active components and reducing the space occupied, which is conducive to reducing the overall volume of the relay.

[0023] 2. The auxiliary moving contact is arranged on the auxiliary moving spring. When the magnetic steel assembly drives it to undergo elastic deformation, elastic potential energy can be accumulated inside it. When the driving force of the magnetic steel assembly disappears, the elastic potential energy is released, and the auxiliary moving contact and the magnetic steel assembly can be reset, thus realizing the power-off reset function of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0025] Figure 1 A schematic diagram of the structure of the auxiliary contact system of the relay provided by the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the base provided by the utility model;

[0027] Figure 3 This is a schematic diagram of the structure of the magnetic steel assembly provided by the utility model;

[0028] Figure 4 This is a schematic structural diagram of a magnetic steel assembly in another embodiment provided by the utility model;

[0029] Figure 5 Provided by the utility model Figure 1 Enlarged view of point A in the middle.

[0030] Figure 1-Figure 5 middle:

[0031] 1. Base; 101. Fixing plate; 1011. Mounting hole; 1012. Guide groove; 102. Mounting groove; 1021. Z-shaped bending groove; 1022. Cavity in the groove; 103. Limiting seam; 104. Mounting surface;

[0032] 2. Magnetic steel assembly; 201. Rotating shaft; 202. Elastic support arm; 203. Boss; 2031. Slot;

[0033] 3. Auxiliary static spring; 301. Auxiliary static contact;

[0034] 4. Auxiliary moving spring; 401. Auxiliary moving contact. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] The core of the utility model is to provide an auxiliary contact system of a relay, which adopts a magnetic steel component instead of a separate push rod to realize the integration of the push rod and the magnetic steel component, reduce the space occupied by the action element, and facilitate the miniaturization and compactness of the electromagnetic relay product.

[0037] Please refer to Figure 1-Figure 5 , an auxiliary contact system of a relay, comprising:

[0038] Base 1;

[0039] An auxiliary static spring 3 is fixedly mounted on the base 1 and has an auxiliary static contact 301 disposed therein;

[0040] The auxiliary dynamic spring 4 is fixedly mounted on the base 1 in the form of a cantilever beam, and an auxiliary dynamic contact 401 is arranged at a position corresponding to the auxiliary static contact 301 in the free end;

[0041] The magnetic steel assembly 2 is rotatably mounted with the base 1, and a boss 203 is provided at the movable end, and the boss 203 abuts against the auxiliary movable spring 4. When the magnetic steel assembly 2 rotates, the boss 203 can drive the auxiliary movable spring 4 to deform, so as to change the contact and conduction state of the auxiliary movable contact 401 and the auxiliary static contact 301;

[0042] During the design, the auxiliary static spring 3 is installed in an integrally fixed manner, and the auxiliary dynamic spring 4 is installed in the form of a cantilever beam. When the electromagnetic coil is energized, the magnetic steel assembly 2 can swing to one side. During the swinging process, the auxiliary dynamic spring 4 is driven to deform, thereby changing the conduction relationship between the auxiliary static contact 301 and the auxiliary dynamic contact 401.

[0043] In some embodiments, the auxiliary moving contact 401 and the auxiliary static contact 301 are normally closed contacts, that is, when the electromagnetic coil is not energized, the magnetic steel assembly 2 is not subjected to external force, and the auxiliary moving spring 4 is not deformed, the auxiliary moving contact 401 is in contact with the auxiliary static contact 301 and is connected; when the electromagnetic coil is energized, the magnetic steel assembly 2 is rotated by force, which drives the auxiliary moving spring 4 to deform, and drives the auxiliary moving contact 401 to separate from the auxiliary static contact 301 and not conduct; when the electromagnetic coil loses power again, the auxiliary moving spring 4 is reset, driving the magnetic steel assembly 2 to reset synchronously, and the auxiliary moving contact 401 is closed and connected with the auxiliary static contact 301;

[0044] In other embodiments, the auxiliary moving contact 401 and the auxiliary static contact 301 are normally open contacts, that is, when the electromagnetic coil is not energized, the magnetic steel assembly 2 is not affected by external force, and the auxiliary moving spring 4 is not deformed, the auxiliary moving contact 401 and the auxiliary static contact 301 are separated and not conductive; when the electromagnetic coil is energized, the magnetic steel assembly 2 is rotated under force, driving the auxiliary moving spring 4 to deform, driving the auxiliary moving contact 401 and the auxiliary static contact 301 to contact and conduct; when the electromagnetic coil loses power again, the auxiliary moving spring 4 resets, driving the magnetic steel assembly 2 to reset synchronously, and the auxiliary moving contact 401 and the auxiliary static contact 301 are separated and not conductive.

[0045] Meanwhile, in some embodiments, the auxiliary static spring 3 is also installed in the form of a cantilever beam, such as Figure 1 As shown, the auxiliary static contact 301 is arranged at the free end of the auxiliary static spring 3. When the auxiliary static contact 301 and the auxiliary moving contact 401 are working, if a large current passes through their interior, adhesion will occur when the two are separated, that is, the auxiliary moving contact 401 drives the auxiliary static contact 301 to move synchronously. At this time, the auxiliary static spring 3 will also undergo a certain deformation. When the force generated by the elastic potential energy inside the auxiliary static spring 3 is greater than the acting force between the auxiliary moving contact 401 and the auxiliary static contact 301, the auxiliary static spring 3 can be quickly reset, that is, the auxiliary static contact 301 and the auxiliary moving contact 401 are quickly separated, reducing arcing, thereby reducing the contact burning phenomenon of the auxiliary static contact 301 and the auxiliary moving contact 401 and extending their service life.

[0046] In some embodiments, the magnetic steel assembly 2 is disposed inside the base 1, but in some embodiments, such as Figure 2 As shown, two sets of fixing plates 101 are arranged in the form of cantilever beams on the sides of the base 1. The two sets of fixing plates 101 are arranged in parallel and have mounting holes 1011 coaxially arranged inside. A rotating shaft 201 rotatably mounted with the mounting holes 1011 is arranged inside the magnetic steel assembly 2.

[0047] The fixing plate 101 for mounting the magnetic steel assembly 2 is arranged on the side of the base 1 to facilitate the assembly of the magnetic steel assembly 2, and the side wall of the base 1, namely the mounting surface 104, can limit the rotation angle of the magnetic steel assembly 2. During assembly, it is only necessary to expand the distance between the free ends of the two sets of fixing plates 101 to insert the magnetic steel assembly 2 until the rotating shaft 201 and the mounting hole 1011 are completely rotated and installed.

[0048] In order to further improve the assembly efficiency of the magnetic steel assembly 2, a guide groove 1012 is provided on the surface of the fixing plate 101 for guiding the movement trajectory of the rotating shaft 201 during installation. The guide groove 1012 communicates with the installation hole 1011 and the free end of the fixing plate 101.

[0049] Compared with the design without the guide groove 1012, when installing the magnetic steel assembly 2, it is only necessary to slightly expand the distance between the free ends of the two sets of fixed plates 101 so that the rotating shaft 201 enters the guide groove 1012, and then continue to push the magnetic steel assembly 2 inward, and the rotating shaft 201 can enter the mounting hole 1011 along the direction of the guide groove 1012. During the process, there is no need to use auxiliary tools to ensure the installation relationship between the rotating shaft 201 and the mounting hole 1011, which can further improve the installation efficiency.

[0050] In order to further improve the assembly efficiency of the magnetic steel assembly 2, the bottom of the guide groove 1012 is a wedge-shaped surface, the groove depth at one end close to the mounting hole 1011 is smaller than the other end, and the groove width at one end close to the mounting hole 1011 is smaller than the other end;

[0051] That is, the opening size of the guide groove 1012 near the free end of the fixing plate 101 is enlarged to facilitate the entry of the rotating shaft 201, thereby reducing the precision requirement during the assembly of the magnetic steel assembly 2 and facilitating the improvement of assembly efficiency.

[0052] In some embodiments, Figure 1 As shown, the auxiliary dynamic spring 4 and the auxiliary static spring 3 are located on both sides of the fixed plate 101 with the magnetic steel assembly 2, and the boss 203 passes through the fixed plate 101, and the boss 203 is an insulator;

[0053] The auxiliary dynamic spring 4 and the auxiliary static spring 3 are separated from the magnetic steel assembly 2 by the fixing plate 101, thereby increasing the physical distance between the magnetic steel assembly 2 and the other two and reducing the interference of the internal magnetism of the magnetic steel assembly 2 on the movement of the auxiliary dynamic spring 4 and the auxiliary static spring 3.

[0054] Furthermore, a limiting slot 103 is provided in the base 1, and the boss 203 is inserted into the limiting slot 103, so as to limit the maximum rotation angle of the magnetic steel assembly 2;

[0055] By designing the distance between the mounting hole 1011 and the mounting surface 104, and the maximum turning radius of the magnetic steel assembly 2, the maximum rotation angle of the magnetic steel assembly 2 in the base 1 can be limited. This requires that relays of different specifications be designed with dedicated magnetic steel assemblies 2 and base 1 molds, which is costly. Therefore, by providing a limiting gap 103 in the base 1, only the width or length of the limiting gap 103 is limited, so that the maximum displacement of the boss 203 can be limited, thereby limiting the maximum rotation angle of the magnetic steel assembly 2. Compared with the previous design, this can reduce the cost of the product, ensure the consistency of the magnetic steel assembly 2, and improve its maintenance convenience during subsequent use.

[0056] In some embodiments, Figure 3 and Figure 4 As shown, the surface of the boss 203 is provided with a through slot 2031, and the auxiliary dynamic spring 4 passes through the slot 2031;

[0057] A slot 2031 is provided at the top of the boss 203, and the auxiliary dynamic spring 4 passes through the slot 2031, which can ensure that when the boss 203 moves to either side, it can drive the auxiliary dynamic spring 4 to deform, and when the auxiliary dynamic spring 4 is reset, it can synchronously drive the boss 203 to move, and then drive the magnetic steel assembly 2 to rotate. At the same time, the auxiliary dynamic spring 4 can be pulled in the slot 2031, that is, when the rotation axis of the boss 203 is inconsistent with the bending axis of the auxiliary dynamic spring 4, the two can be relatively pulled along the length direction of the auxiliary dynamic spring 4, so as to avoid getting stuck.

[0058] In some embodiments, Figure 5 As shown, a plurality of mounting grooves 102 are provided in the base 1 for fixing the auxiliary static spring 3 and the auxiliary dynamic spring 4, and at least two groups of clamping points are provided in the mounting grooves 102;

[0059] The auxiliary static spring 3 and the auxiliary dynamic spring 4 are installed in the form of a cantilever beam. In order to avoid the problem of loosening or falling off of the fixed end when it is deformed, at least two groups of clamping points are set in the installation groove 102 for fixing, so as to ensure its fixing stability. At the same time, in view of the characteristic that the auxiliary dynamic spring 4 needs to be deformed, an in-groove cavity 1022 is set between the two groups of support points, that is, space is reserved in the in-groove cavity 1022 for the auxiliary dynamic spring 4 at this end to deform along the normal direction. This is mainly for the auxiliary dynamic spring 4 between the two groups of clamping points to be able to deform appropriately when the free end of the auxiliary dynamic spring 4 is greatly deformed, so as to avoid the relay failure problem caused by plastic deformation of its free end.

[0060] Furthermore, in order to ensure the installation stability of the auxiliary static spring 3 and the auxiliary dynamic spring 4, the parts of the auxiliary static spring 3 and the auxiliary dynamic spring 4 in the installation groove 102 are provided with a Z-shaped bend, and a matching Z-shaped bend groove 1021 is provided in the installation groove 102;

[0061] By setting a Z-shaped bend in the clamping part of the auxiliary static spring 3 and the auxiliary dynamic spring 4, and setting a corresponding Z-shaped bend groove 1021 in the installation groove 102, the displacement of the auxiliary static spring 3 and the auxiliary dynamic spring 4 in the length direction thereof can be limited, especially to prevent the auxiliary dynamic spring 4 from twitching in the length direction when deformed.

[0062] In some embodiments, to ensure that the magnetic steel assembly 2 can be quickly reset after the electromagnetic coil is powered off, Figure 4 As shown, an elastic support arm 202 is provided in the form of a cantilever beam in the magnetic steel assembly 2, the length direction of the elastic support arm 202 is perpendicular to the axis of the magnetic steel assembly 2, and the free end of the elastic support arm 202 abuts against the base 1;

[0063] After the electromagnetic coil is powered off, the elastic potential energy in the auxiliary dynamic spring 4 is released, driving the magnetic steel assembly 2 to reset. However, after long-term use, the metal fatigue inside the auxiliary dynamic spring 4 increases, and the problem of incomplete reset may occur. In order to avoid the relay failure problem caused by this problem, an elastic support arm 202 is added to the magnetic steel assembly 2. When the electromagnetic coil is powered on and the magnetic steel assembly 2 is in motion, the elastic support arm 202 is compressed and deformed to store energy. When the electromagnetic coil is powered off, the elastic potential energy of the elastic support arm 202 is released, causing the magnetic steel assembly 2 to reset, thereby reducing the dependence on the elastic potential energy of the auxiliary dynamic spring 4 and extending the service life of the auxiliary dynamic spring 4.

[0064] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0065] The auxiliary contact system of the relay provided by the utility model is introduced in detail above. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. An auxiliary contact system of a relay, characterized in that: include: Base (1); An auxiliary static spring (3) is fixedly mounted on the base (1) and is provided with an auxiliary static contact (301) inside; An auxiliary moving spring (4) is fixedly mounted on the base (1) in the form of a cantilever beam, and an auxiliary moving contact (401) is provided at a position in the free end corresponding to the auxiliary static contact (301); The magnetic steel component (2) is rotatably mounted on the base (1), and a boss (203) is provided at the movable end, the boss (203) abuts against the auxiliary movable spring (4), and when the magnetic steel component (2) rotates, the boss (203) can drive the auxiliary movable spring (4) to deform, thereby changing the contact and conduction state of the auxiliary movable contact (401) and the auxiliary static contact (301).

2. The auxiliary contact system of the relay according to claim 1, characterized in that: Two groups of fixing plates (101) are arranged on the side of the base (1) in the form of cantilever beams. The two groups of fixing plates (101) are arranged in parallel and have mounting holes (1011) coaxially arranged inside. A rotating shaft (201) is arranged inside the magnetic steel assembly (2) and is rotatably mounted with the mounting hole (1011).

3. The auxiliary contact system of the relay according to claim 2, characterized in that: A guide groove (1012) is provided on the surface of the fixing plate (101) for guiding the movement trajectory of the rotating shaft (201) during installation, and the guide groove (1012) is connected to the installation hole (1011) and the free end of the fixing plate (101).

4. The auxiliary contact system of the relay according to claim 3, characterized in that: The groove bottom of the guide groove (1012) is a wedge-shaped surface, the groove depth at one end close to the mounting hole (1011) is smaller than the groove width at the other end, and the groove width at one end close to the mounting hole (1011) is smaller than the groove width at the other end.

5. The auxiliary contact system of the relay according to claim 2, characterized in that: The auxiliary dynamic spring (4) and the auxiliary static spring (3) are located on both sides of the fixed plate (101) with the magnetic steel assembly (2); the boss (203) passes through the fixed plate (101); and the boss (203) is an insulator.

6. The auxiliary contact system of the relay according to claim 5, characterized in that: A limiting slot (103) is provided in the base (1), and the boss (203) is inserted into the limiting slot (103) to limit the maximum rotation angle of the magnetic steel assembly (2).

7. The auxiliary contact system of the relay according to claim 5, characterized in that: The surface of the boss (203) is provided with a penetrating slot (2031), and the auxiliary dynamic spring (4) penetrates the slot (2031).

8. The auxiliary contact system of the relay according to claim 1, characterized in that: The base (1) is provided with a plurality of groups of mounting grooves (102) for fixing the auxiliary static spring (3) and the auxiliary dynamic spring (4), and the mounting grooves (102) are provided with at least two groups of clamping points.

9. The auxiliary contact system of the relay according to claim 8, characterized in that: The portions of the auxiliary static spring (3) and the auxiliary dynamic spring (4) located in the installation groove (102) are provided with a Z-shaped bend, and a matching Z-shaped bend groove (1021) is provided in the installation groove (102).

10. The auxiliary contact system of a relay according to any one of claims 1 to 9, characterized in that: An elastic support arm (202) is arranged in the form of a cantilever beam in the magnetic steel component (2); the length direction of the elastic support arm (202) is perpendicular to the axis of the magnetic steel component (2); and the free end of the elastic support arm (202) abuts against the base (1).

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