Spring structure and relay

Abstract

This application discloses a spring structure and a relay, relating to the field of relay technology. The spring structure includes a main body, a first deformation part, and a second deformation part. The first deformation part is disposed on the main body and forms a first angle with the main body. The first deformation part is configured to change the size of the first angle through its own deformation. The second deformation part is disposed on the main body and forms a second angle with the main body. The second deformation part is configured to change the size of the second angle through its own deformation. The first and second deformation parts are located on the same side of the main body, and the second angle is larger than the first angle. In the technical solution provided by the embodiments of this application, by setting two deformation parts, the reaction torque is further increased, preventing the movable terminal part from contacting the fixed terminal part at a relatively fast speed, thus avoiding collision and wear between the two. This also prevents the movable terminal part from engaging with the fixed terminal part and breaks the arc generated between them, improving the armature reset speed and ensuring the reliability of the relay.

Description

Technical Field

[0001] This application relates to the field of relay technology, and in particular to a spring structure and a relay. Background Technology

[0002] A relay is an automatic switch that uses a small-current electromagnetic coil to control a large-current circuit. When the coil is energized and generates a magnetic field, it attracts the armature and drives the contacts to close or open, thereby realizing the functions of isolating, amplifying, converting and protecting weak current from strong current. It is widely used in charging piles, automobiles, home appliances and industrial automation.

[0003] In related technologies, relays generate a magnetic field through coils to drive the armature to rotate, thereby causing the movable terminal to contact or disconnect from the fixed terminal, thus controlling the on / off state of external circuits. When no current flows through the coil, the armature needs to be reset. This is usually achieved by using a spring structure to press the armature against the knife edge of the yoke, so that the armature is reset under the elastic force of the spring structure.

[0004] The spring-loaded structure undergoes elastic deformation under stress, generating an initial reaction force. However, due to the single elastic arm, only a single-segment reaction force can be generated, resulting in a limited reaction torque. This can lead to excessively high collision speeds between the movable and fixed terminals, adversely affecting the terminals. Furthermore, the arc generated after the movable and fixed terminals engage is not easily broken. Utility Model Content

[0005] This application discloses a spring structure and a relay, which aims to provide a spring structure with a multi-segmented reaction torque, which can generate a larger reaction torque after the movable terminal part and the fixed terminal part are attracted together, so as to break the electric arc between the two.

[0006] One embodiment of this application proposes a spring-loaded structure, including:

[0007] main body;

[0008] A first deformation part is disposed on the main body and forms a first angle with the main body. The first deformation part is configured to change the size of the first angle by deforming itself.

[0009] A second deformation part is disposed on the main body and forms a second angle with the main body. The second deformation part is configured to change the size of the second angle by deforming itself.

[0010] The first deformed portion and the second deformed portion are located on the same side of the main body, and the second included angle is greater than the first included angle.

[0011] In one embodiment, the first deformable portion includes a first bent section and a first straight section, the first straight section being disposed on the main body via the first bent section, and the first straight section being used to abut against the armature.

[0012] In one embodiment, the spring structure further includes a second straight section, which is disposed at the end of the first bent section away from the first straight section, and the first bent section is disposed in the main body through the second straight section;

[0013] The second straight segment is coplanar with the main body.

[0014] In one embodiment, the first deformable part includes two first deformable arms and a first crossbeam. Each first deformable arm includes a first straight section, a first bent section and a second straight section connected in sequence, and the second straight section is connected to the main body.

[0015] The ends of the two first straight sections away from the first bent section are connected by the first crossbeam.

[0016] In one embodiment, the second deformable portion includes a second bent section and a third straight section, the third straight section being disposed on the main body via the second bent section, and the third straight section being used to abut against the armature.

[0017] In one embodiment, the spring structure further includes a fourth straight section, which is disposed at the end of the second bent section away from the third straight section, and the second bent section is disposed in the main body through the fourth straight section;

[0018] The fourth straight segment is coplanar with the main body.

[0019] In one embodiment, the spring structure further includes a back plate disposed on the main body and located on the side of the second deformation portion opposite to the first deformation portion.

[0020] In one embodiment, the back plate is provided with a latch, the latch being disposed at an angle to the back plate, and the latch being configured to change the angle between the latch and the back plate by deforming itself.

[0021] The back plate has a locking part on the side facing away from the latch, which is used to lock with the armature.

[0022] In one embodiment, the first included angle is 70° to 83°; and / or

[0023] The second included angle is 88° to 90°.

[0024] An embodiment of this application also provides a relay, including a housing, a fixed terminal portion, a movable terminal portion, an electromagnet, and a spring structure as described above. The housing forms a receiving cavity, and the fixed terminal portion and the movable terminal portion are disposed in the receiving cavity. The electromagnet includes a coil, an armature, and a yoke. The yoke is disposed on the side of the coil facing the movable terminal portion, and the armature is rotatably disposed on the yoke and abuts against the movable terminal portion.

[0025] The main body is in contact with the yoke, and at least a portion of the structure of the first deformable part and the second deformable part abuts against the yoke.

[0026] The present application provides several embodiments of a spring-loaded structure and a relay using the spring-loaded structure. The spring-loaded structure mainly includes a main body, a first deformation part, and a second deformation part. The first deformation part and the second deformation part are integral with the main body and are located on the same side of the main body. The first deformation part forms a first angle with the main body, and the second deformation part forms a second angle with the main body. The second angle is greater than the first angle. In practical use, the main body is in contact with the yoke, and the first deformation part is in contact with the armature. At this time, since the angle of the second deformation part is greater than that of the first deformation part, it has not yet come into contact with the armature. The reaction force on the armature at this time comes from the elastic force generated by the deformation of the first deformation part. When the coil is energized and generates a magnetic field, the armature rotates under the action of magnetic force until it comes into contact with the second deformation part. At this time, the reaction force on the armature comes from the superposition of the elastic forces generated by the deformation of the first and second deformation parts. The reaction torque is further increased, which avoids the movable terminal part from contacting the fixed terminal part at a faster speed, causing them to collide and wear. In addition, the larger reaction force can also prevent the movable terminal part from being attracted to the fixed terminal part and break the arc generated between them, improve the armature reset speed, and ensure the reliability of the relay. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of an embodiment of the spring-loaded structure provided in this application;

[0029] Figure 2 for Figure 1 A schematic diagram of the shrapnel structure from another angle;

[0030] Figure 3This is a schematic diagram of the internal structure of an embodiment of the relay provided in this application;

[0031] Figure 4 This is a schematic diagram of the structure of the armature and spring in the relay provided in this application.

[0032] Figure 5 This is a vector diagram of the moment of the spring structure proposed in this application.

[0033] Explanation of icon numbers:

[0034] 100. Spring structure; 1. Main body; 2. First deformation part; 21. First deformation arm; 211. First bending section; 212. First straight section; 213. Second straight section; 22. First crossbeam; 2a. First included angle; 3. Second deformation part; 31. Second deformation arm; 311. Second bending section; 312. Third straight section; 313. Fourth straight section; 32. Second crossbeam; 3a. Second included angle; 4. Back plate; 41. Snap-fit ​​part; 5. Snap tongue. Detailed Implementation

[0035] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of several embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0036] It should be noted that if directional indications (such as up, down, left, right, front, back, etc.) are involved in multiple embodiments of this application, the directional indications are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0037] Furthermore, if multiple embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0038] In related technologies, relays generate a magnetic field through coils to drive the armature to rotate, thereby causing the movable terminal to contact or disconnect with the fixed terminal, thus controlling the on / off state of external circuits. When no current flows through the coil, the armature needs to be reset. This is usually achieved by using a spring structure 100 to press the armature against the knife edge of the yoke, so that the armature is reset under the elastic force of the spring structure 100.

[0039] The spring structure 100 will undergo elastic deformation under stress, generating an initial reaction force. Since there is only a single elastic arm, it can only generate a single-segment reaction force with limited torque. This may lead to excessively high collision speed between the movable terminal and the fixed terminal, adversely affecting the terminal. Furthermore, the arc generated after the movable terminal and the fixed terminal are attracted together is not easily broken.

[0040] To address the aforementioned problems, this application proposes a spring clip structure 100 to solve the technical issues mentioned above.

[0041] Please see Figure 1 In one embodiment of this application, the spring structure 100 includes a main body 1, a first deformation part 2, and a second deformation part 3. The first deformation part 2 is disposed on the main body 1 and forms a first angle 2a with the main body 1. The first deformation part 2 is configured to change the size of the first angle 2a by deforming itself. The second deformation part 3 is disposed on the main body 1 and forms a second angle 3a with the main body 1. The second deformation part 3 is configured to change the size of the second angle 3a by deforming itself. The first deformation part 2 and the second deformation part 3 are located on the same side of the main body 1, and the second angle 3a is greater than the first angle 2a.

[0042] It is understandable that the first deformation part 2, the second deformation part 3, and the main body 1 are all integral structures, formed by stamping aluminum alloy blanks. Specifically, after continuous stamping processes such as blanking, punching, bending, and shaping, the aluminum alloy strip undergoes deburring, aging, and surface passivation treatments to complete the integral spring sheet forming. Using the same continuous die, the aluminum alloy strip can be directly stamped into an integral structure with the main body 1, the first deformation part 2, and the second deformation part 3, eliminating the need for subsequent welding or riveting, ensuring stable dual-stage reaction force characteristics, and reducing the number of parts and assembly processes. The integral stamping process eliminates weld points or riveting between the main body 1, the first deformation part 2, and the second deformation part 3, eliminating reaction force drift caused by loose connections and significantly improving overall rigidity and fatigue life; it also reduces the number of parts and assembly processes, lowers manufacturing costs, and ensures the consistency and long-term stability of the dual-stage reaction force characteristics.

[0043] The present application provides several embodiments of a spring structure 100 and a relay using the spring structure 100. The spring structure 100 mainly includes a main body 1, a first deformation part 2 and a second deformation part 3. The first deformation part 2 and the deformation part are integral with the main body 1 and are located on the same side of the main body 1. The first deformation part 2 forms a first angle 2a with the main body 1 and the second deformation part 3 forms a second angle 3a with the main body 1. The second angle 3a is greater than the first angle 2a. In practical use, the main body 1 is in contact with the yoke, and the first deformation part 2 is in contact with the armature. At this time, since the angle of the second deformation part 3 is greater than that of the first deformation part 2, it has not yet come into contact with the armature. The reaction force on the armature at this time comes from the elastic force generated by the deformation of the first deformation part 2. When the coil is energized and generates a magnetic field, the armature rotates under the action of the magnetic force until it comes into contact with the second deformation part 3. At this time, the reaction force on the armature comes from the superposition of the elastic forces generated by the deformation of the first deformation part 2 and the second deformation part 3. The reaction torque is further increased, which avoids the movable terminal part from contacting the fixed terminal part at a faster speed, causing them to collide and wear. In addition, the larger reaction force can also prevent the movable terminal part from being attracted to the fixed terminal part and break the arc generated between them, improve the armature reset speed, and ensure the reliability of the relay.

[0044] To ensure reliable deformation of the first deformation section 2, the first deformation section 2 includes a first bent section 211 and a first straight section 212. The first straight section 212 is provided on the main body 1 through the first bent section 211 and is used to abut against the armature. For details, please refer to further reading. Figure 1 The first deformation section 2 is composed of a first bent section 211 and a first straight section 212: the first bent section 211 lifts the first straight section 212 from one side of the main body 1 to form an elastic cantilever; when the armature rotates, the first straight section 212 contacts and is compressed first, and the bent section then undergoes bending deformation. This structure converts linear displacement into angular deformation at the bend, and the stress is concentrated at the root of the bent section, which not only improves the elastic stroke but also reduces the wear of the contact surface between the straight section and the armature; at the same time, the bending angle determines the magnitude of the initial reaction force, which makes it easy to obtain a precise first-stage torque in one molding process without the need for additional shims or adjusting parts.

[0045] Correspondingly, the second deformation section 3 includes a second bent section 311 and a third straight section 312. The third straight section 312 is provided on the main body 1 through the second bent section 311. When the armature moves to the preset contact position, it abuts against the second straight section 213, increasing the reaction torque. The specific structure of the second deformation section 3 is the same as that of the first deformation section 2, and will not be described again here.

[0046] Furthermore, the spring structure 100 also includes a second straight section 213, which is located at the end of the first bent section 211 away from the first straight section 212. The first bent section 211 is located in the main body 1 via the second straight section 213. For details, please refer to further documentation. Figure 1 The second straight section 213 is coplanar with and welded to the main body 1, forming a "short bridge" that connects the root of the first bent section 211 to the plane of the main body 1. This allows the stress point of the first deformed part 2 to fall directly on the edge of the main body 1, increasing the support rigidity of the bent section, preventing tearing at the root, and keeping the whole structure in the same plane. This eliminates the need for additional shims and simplifies assembly. Furthermore, when the first deformed part 2 deforms, the second straight section 213 also partially deforms along with the main body 1, thereby extending the deformation path.

[0047] Correspondingly, the second deformation part 3 also includes a fourth straight section 313. The second bending section 311 is connected to one side of the main body 1 through the fourth straight section 313. The fourth straight section 313 of the second deformation part 3 is spaced apart from the second straight section 213 of the first deformation part 2. Since the specific structure of the second deformation part 3 is the same as that of the first deformation part 2, it will not be described again here.

[0048] In another embodiment of this application, the first deformable part 2 includes two first deformable arms 21 and a first crossbeam 22. Each first deformable arm 21 includes a first straight section 212, a first bent section 211, and a second straight section 213 connected in sequence. The second straight section 213 is connected to the main body 1. The ends of the two first straight sections 212 away from the first bent section 211 are connected by the first crossbeam 22. For details, please refer to further reading. Figure 1 The two first deformation arms 21 and the first crossbeam 22 form a "gate"-shaped whole. The two arms are subjected to force synchronously and are interlocked by the crossbeam, resulting in consistent deformation and doubled stiffness. This improves the stability of the reaction force and avoids unilateral load. The crossbeam also acts as a limiting surface, limiting the maximum deflection and preventing over-bending. It can be formed by a single stamping blank without the need for additional parts. The second deformation part 3 includes two second deformation arms 31 and a second crossbeam 32. The specific structure can be referred to the specific structure of the first deformation part 2, which will not be repeated here.

[0049] To fix the spring clip structure 100, the spring clip structure 100 also includes a back plate 4. The back plate 4 is disposed on the main body 1 and located on the side of the second deformation part 3 facing away from the first deformation part 2. The back plate 4 is in close contact with the yoke. For details, please refer to further reference. Figure 2The back plate 4 provides a stable support surface for the main body 1 and the two deformation parts, ensuring that the direction of the elastic force is always perpendicular to the yoke and preventing the spring from swaying. At the same time, the back plate 4 increases the contact area, disperses stress, prevents local indentation or loosening, and ensures that the reaction force characteristics are consistent over a long period of time. The back plate 4 is provided with a latch 5, which is set at an angle to the back plate 4. The latch 5 is configured to change the angle between the latch 5 and the back plate 4 by its own deformation. The back plate 4 has a locking part 41 on the side facing away from the latch 5. The locking part 41 is used to lock with the armature. The latch 5 and the back plate 4 form an elastic hook at an angle. During assembly, it can be automatically locked by pressing it into the groove of the housing without screws. After the locking part 41 locks with the armature, a locking structure is formed, which not only ensures that the spring is firmly fixed, but also allows the armature to self-adjust slightly during rotation, reducing friction and improving the reset speed and service life.

[0050] In one embodiment of this application, the spring structure 100 has multiple deformation states. In the initial unassembled state, the first included angle 2a of the spring structure 100 is 70° to 83°, and the second included angle 3a is 88° to 90°. After the spring structure 100 is assembled, the first elastic part will abut against the armature to generate deformation and provide preload. At this time, the first included angle 2a is 85°, and the second included angle 3a is still 88° to 90°. When the movable terminal part and the fixed terminal part just come into contact, the first included angle 2a is equal to the second included angle 3a, which is 90°. When the movable terminal part and the fixed terminal part are completely closed, the first included angle 2a is equal to the second included angle 3a, which is 92°.

[0051] As the relay begins to rotate under electromagnetic attraction until the movable and fixed terminals just come into contact, the distance between the second elastic part and the armature continuously decreases until they come into contact, after which elastic deformation occurs. Before the second elastic part comes into contact with the armature, the armature reaction force is provided by the first elastic part; after the second elastic part comes into contact with the armature, the armature reaction force is provided by both the first and second elastic parts. Therefore, the reaction force of the new reaction spring on the armature is two-stage. Combined with the reaction force of another spring in the overtravel range after the movable and fixed terminals come into contact, the relay will have three stages of reaction force during the entire activation process. The reaction force characteristic curve of the spring structure 100 is as follows: Figure 5As shown. δ0 is the initial position of the armature after the reaction spring is installed in the relay, and F0 is the initial reaction force of the first elastic part on the armature. When the armature rotates to δ1, the second elastic part just contacts the armature, and F1 is the armature reaction force at this moment. At this time, the second elastic part has not yet undergone elastic deformation, and the armature reaction force is still provided solely by the first elastic part. After the armature 2 rotates beyond δ1, the second elastic part undergoes elastic deformation, thereby generating a reaction force on the armature. Within the range of δ1 to δ2, the armature reaction force is provided jointly by the first and second elastic parts. Therefore, the absolute value of the slope of the reaction force torque in this range is greater than that within the range of δ0 to δ1, that is, the line segment becomes "steeper". After the armature rotates beyond δ2, it enters the overtravel range. In this range, the movable terminal and the fixed terminal contact, and the spring above the contact will undergo elastic deformation to provide a certain contact pressure. The increase in the rotational reaction force of the armature assembly reduces the collision speed between the movable and fixed terminals of the relay, thus slowing down the wear of the contacts. On the other hand, the relay releases more quickly, and the release time is shorter, which is more conducive to breaking the arc. At the same time, the breaking force of the relay is also improved, which is beneficial for breaking both the movable and fixed terminals. The new reaction spring improves the electrical life of the relay in these three aspects.

[0052] This application also discloses a relay comprising a housing, a fixed terminal portion, a movable terminal portion, an electromagnet, and a spring-loaded structure 100 as described above. For details, please refer to... Figure 3 and Figure 4 The housing has a receiving cavity, and a fixed terminal portion and a movable terminal portion are disposed in the receiving cavity. The electromagnet includes a coil, an armature, and a yoke. The yoke is disposed on the side of the coil facing the movable terminal portion, and the armature is rotatably disposed on the yoke and abuts against the movable terminal portion. The main body 1 is in contact with the yoke, and at least a portion of the structure of the first deformation portion 2 and the second deformation portion 3 abuts against the yoke. The specific structure of the spring structure 100 is as described in the above embodiments. Since this relay adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0053] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A sheet structure, characterized by, include: Main body (1); A first deformation part (2) is provided on the main body (1) and forms a first angle (2a) with the main body (1). The first deformation part (2) is configured to change the size of the first angle (2a) by deforming itself. A second deformation part (3) is provided on the main body (1) and forms a second included angle (3a) with the main body (1). The second deformation part (3) is configured to change the size of the second included angle (3a) by deforming itself. The first deformable part (2) and the second deformable part (3) are located on the same side of the main body (1), and the second included angle (3a) is greater than the first included angle (2a).

2. The gusset structure of claim 1, wherein, The first deformable part (2) includes a first bent section (211) and a first straight section (212). The first straight section (212) is disposed on the main body (1) through the first bent section (211) and is used to abut against the armature.

3. The gusset structure of claim 2, wherein, The spring structure further includes a second straight section (213), which is located at the end of the first bent section (211) away from the first straight section (212). The first bent section (211) is located on the main body (1) through the second straight section (213). The second straight segment (213) is coplanar with the main body (1).

4. The gusset structure of claim 1, wherein, The first deformation part (2) includes two first deformation arms (21) and a first crossbeam (22). Each first deformation arm (21) includes a first straight section (212), a first bent section (211) and a second straight section (213) connected in sequence. The second straight section (213) is connected to the main body (1). The ends of the two first straight sections (212) away from the first bent section (211) are connected by the first crossbeam (22).

5. The gusset structure of any one of claims 1 to 4, wherein, The second deformable part (3) includes a second bent section (311) and a third straight section (312). The third straight section (312) is provided on the main body (1) through the second bent section (311) and is used to abut against the armature.

6. The gusset structure of claim 5, wherein, The spring structure further includes a fourth straight section (313), which is located at the end of the second bent section (311) away from the third straight section (312). The second bent section (311) is located on the main body (1) through the fourth straight section (313). The fourth straight segment (313) is coplanar with the main body (1).

7. The gusset structure of any one of claims 1 to 4, wherein, The spring structure also includes a back plate (4), which is disposed on the main body (1) and located on the side of the second deformation part (3) facing away from the first deformation part (2).

8. The gusset structure of claim 7, wherein, The back plate (4) is provided with a latch (5), the latch (5) is set at an angle to the back plate (4), and the latch (5) is configured to change the angle between the latch (5) and the back plate (4) by its own deformation; The back plate (4) has a locking part (41) on the side opposite to the latch (5), which is used to lock with the armature.

9. The gusset structure of any one of claims 1 to 4, wherein, The first included angle (2a) is 70° to 83°; and / or The second included angle (3a) is 88° to 90°.

10. A relay characterized by comprising: The device includes a housing, a fixed terminal portion, a movable terminal portion, an electromagnet, and a spring structure as described in any one of claims 1 to 9. The housing has a receiving cavity, the fixed terminal portion and the movable terminal portion are disposed in the receiving cavity, the electromagnet includes a coil, an armature and a yoke, the yoke is disposed on the side of the coil facing the movable terminal portion, and the armature is rotatably disposed on the yoke and abuts against the movable terminal portion. The main body (1) is in contact with the yoke, and at least a portion of the structure of the first deformable part (2) and the second deformable part (3) abuts against the yoke.

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