Drop-out resistant relay

Abstract

The utility model discloses an anti-falling relay, including base, the coil of setting on the base, the yoke of setting on the base, be provided with static contact on the base, be provided with armature assembly on the yoke, and the movable contact that is disconnected or closed to static contact is provided with on the movable spring leaf that is linked with armature assembly, be provided with the armature accommodating cavity of the armature assembly placement on the base, the lower part of armature limiting block subassembly is placed in the armature accommodating cavity, and the initial preset distance is defined between armature limiting block subassembly and armature assembly. When the relay falls, through the design of armature limiting block subassembly, guarantee the normal rotation of armature to armature limit, through the design of movable spring leaf angle and contact limiting block, guarantee the anti-falling height of relay, the parameter before and after falling and the complete structure function after falling.

Description

Technical Field

[0001] This utility model relates to a drop-resistant relay, and more particularly to a drop-resistant relay that can maintain a certain contact pressure for closure or conduction even after a high drop. Background Technology

[0002] With the development of new energy technologies and the popularization of new energy vehicles, on-board charging guns for emergency use are widely used. Because these on-board charging guns are flexible and casually used, they are often carelessly discarded. The relay, a core component of these guns, is not designed for this application condition, and current products lack drop-resistant designs.

[0003] Analysis of the reasons for poor relay drop performance: The main phenomena of relay failure after a drop include a decrease in pull-in and release voltages, and insufficient pressure at the pull-in contacts, resulting in complete engagement without conduction. Through internal comparison before and after the drop, the main abnormality was found to be severe deformation of the moving spring (mainly manifested as the moving spring collapsing at the terminal root and the moving spring head tilting upwards), which prevented the armature push rod from fully pushing the moving spring assembly (contacts and moving spring) to the closed state.

[0004] Further analysis reveals that the main reason for the upward tilting of the moving spring head is that when the relay falls in the Y+ direction, due to the contact mass and inertia of the moving spring head, a significant impact is generated at the bending point of the moving spring head upon impact, under the combined action of the base, causing the moving spring head to tilt upwards. The reason for the downward collapse of the moving spring at the terminal root is that the armature assembly is only fixed by a hook, which cannot completely secure it in its original position. When the impact occurs during the fall, the armature will experience a small downward displacement, transmitting this impact to the moving spring and causing deformation. Ultimately, these factors reduce the relay's anti-interference capability, leading to malfunction.

[0005] Currently available relays can only withstand a 1m drop test, and cannot withstand a 1.6m drop test with 60 cycles. In view of these problems, this invention aims to provide a relay that overcomes these limitations. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a drop-resistant relay, which has the characteristic of maintaining a certain contact pressure for closure or conduction even after the relay has been dropped from a height.

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an anti-drop relay, the innovation of which is: the anti-drop relay includes a base, a coil disposed on the base, and a yoke disposed on the base. The base is provided with a stationary contact, the yoke is provided with an armature assembly, a moving spring that is linked with the armature assembly is provided with a moving contact that is disconnected or closed with the stationary contact, the base is provided with an armature receiving cavity for the armature assembly to be placed in, the lower part of the armature limiting block assembly is placed in the armature receiving cavity, and an initial preset distance is set between the armature limiting block assembly and the armature assembly;

[0008] The movable spring is integrally bent from a sheet material. The movable spring includes at least a first part with one end fixed to the base, a second part for mounting the movable contact, and a third part connecting the first part and the second part. The first part and the third part form an angle of angle 2, and the second part and the third part form an angle of angle 3. Both angle 2 and angle 3 are obtuse angles, and angle 2 is greater than angle 3.

[0009] A contact limiting block is provided at the position of the moving contact on the base. The contact limiting block is positioned above the moving contact, and an initial distance of 1-3 mm is set between the contact limiting block and the moving contact.

[0010] Preferably, the armature limiting block assembly is disposed below the armature assembly; the first part is formed by the intersection of a first plane and a second plane, the first plane and the second plane forming an angle of angle 1, the angle 1 being an obtuse angle, and the angle 1 being greater than the angle 2.

[0011] Preferably, the armature limiting block assembly includes a first armature limiting block and a second armature limiting block located in the armature receiving cavity, the first armature limiting block being located at the connection between the armature assembly and the movable spring, and the second armature limiting block being located in the middle of the armature assembly.

[0012] Preferably, the preset distance between the first armature limiting block and the armature assembly is 0.2-1mm.

[0013] Preferably, the first armature limiting block is a strip-shaped connector distributed along the Y direction, which is perpendicular to the front plane.

[0014] Preferably, the surface of the first armature limiting block facing the armature assembly is an inclined surface with the same inclination as the armature assembly at the corresponding position.

[0015] Preferably, the second armature limiting block is disposed to the left of the first armature limiting block, and the second armature limiting block is located at the bend in the middle of the armature assembly. The second armature limiting block is a block structure.

[0016] Preferably, the surface of the second armature limiting block facing the armature assembly is a curved surface that matches the curvature of the armature assembly at the corresponding position.

[0017] Preferably, the preset distance between the second armature limiting block and the armature assembly is 1-2 mm.

[0018] Preferably, the base is provided with a receiving cavity for inserting the movable spring and having the same shape as the movable spring, and the receiving cavity is provided with the contact limiting block.

[0019] The advantages of this utility model are as follows: through the above structure, when the relay falls, the armature is limited by the armature limiting block assembly to ensure the normal rotation of the armature; through the design of the moving spring angle and the contact limiting block, the relay is guaranteed to maintain its structural and functional integrity in terms of drop height, parameters before and after the drop, and after the drop. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a perspective view of a drop-resistant relay according to this utility model.

[0022] Figure 2 This is a schematic diagram of the structure of a drop-resistant relay according to this utility model.

[0023] Figure 3 This is a schematic diagram of the base structure of a drop-resistant relay according to this utility model.

[0024] Figure 4 This is a schematic diagram of the structure of an anti-drop relay of this utility model, omitting the base portion.

[0025] Figure 5 This is a schematic diagram of the moving spring in an anti-drop relay according to this utility model.

[0026] In the diagram: 1-base, 2-coil, 3-yoke, 4-stationary contact, 5-moving spring, 51-first part, 511-first plane, 512-second plane, 52-second part, 53-third part, 6-moving contact, 7-armature receiving cavity, 8-first armature limiting block, 9-second armature limiting block, 10-sloping surface, 11-curved surface, 12-contact limiting block, 13-armature assembly. Detailed Implementation

[0027] This utility model includes a drop-resistant relay comprising a base 1, a coil 2 disposed on the base 1, and a yoke 3 disposed on the base 1. A stationary contact 4 is disposed on the base 1, and an armature assembly 13 is disposed on the yoke 3. A movable spring 5, which is linked to the armature assembly 13, is provided with a movable contact 6 that is either open or closed to the stationary contact 4. An armature receiving cavity 7 is provided on the base 1 for inserting the armature assembly. The lower part of the armature limiting block assembly is placed in the armature receiving cavity 7, and an initial preset distance is set between the armature limiting block assembly and the armature assembly.

[0028] The movable spring 5 is integrally bent from a sheet material. The movable spring includes at least a first part 51 with one end fixed to the base, a second part 52 for mounting the movable contact, and a third part 53 connecting the first part 51 and the second part 52. The first part 51 and the third part 53 form an angle 2, and the second part 52 and the third part 53 form an angle 3. Both angles 2 and 3 are obtuse angles, and angle 2 is greater than angle 3.

[0029] A contact limiting block 12 is provided at the position of the moving contact on the base 1. The contact limiting block 12 is positioned above the moving contact 6. An initial distance of 1-3mm is set between the contact limiting block 12 and the moving contact 6.

[0030] When the relay is dropped, the armature is limited by the armature limit block assembly to ensure normal rotation of the armature; the design of the moving spring angle and contact limit block ensures the integrity of the relay's structure and function in terms of drop height, parameters before and after the drop, and after the drop.

[0031] like Figure 4 As shown, one end of the movable spring 5 is fixed to the base 1, the middle part of the movable spring 5 is hinged to the armature assembly, and the other end of the movable spring 5 is provided with a movable contact 6. The movable spring 5 is as follows: Figure 5 As shown. The first part 51 is formed by the intersection of the first plane 511 and the second plane 512. The first plane 511 and the second plane 512 form an angle of angle 1, which is an obtuse angle and is greater than angle 2.

[0032] The most direct way to solve the deformation of the moving spring 5 is to limit the armature assembly 13 on the base 1. This is mainly divided into two parts: one is to limit the armature assembly 13, and the other is to limit the moving spring 5.

[0033] The armature limiting block assembly of this utility model is disposed below the armature assembly. The armature limiting block assembly includes a first armature limiting block 8 and a second armature limiting block 9 located in the armature receiving cavity 7. The first armature limiting block 8 is located at the connection between the armature assembly and the moving spring 5, and the second armature limiting block 9 is located in the middle of the armature assembly. The preset distance between the first armature limiting block 8 and the armature assembly is 0.2-1mm. The first armature limiting block 8 is a strip-shaped connector distributed along the Y direction, which is perpendicular to the front plane. The surface of the first armature limiting block 8 facing the armature assembly is an inclined surface 10 with the same slope as the armature assembly at the corresponding position. The second armature limiting block 9 is disposed to the left of the first armature limiting block 8, and the second armature limiting block 9 is located at the bend in the middle of the armature assembly. The second armature limiting block 9 is a block structure. The surface of the second armature limiting block 9 facing the armature assembly is a curved surface 11 that matches the curvature of the armature assembly at the corresponding position; the preset distance between the second armature limiting block 9 and the armature assembly is 1-2mm. When limiting the armature assembly, the preset distance ensures that the armature can rotate normally relative to the yoke 3.

[0034] The base 1 described above is provided with a receiving cavity for inserting the movable spring 5, and the cavity is shaped to match the movable spring. A contact limiting block 12 is provided on the receiving cavity, and the contact limiting block 12 is positioned above the movable contact 6. An initial distance of 1-3mm is set between the contact limiting block 12 and the movable contact 6. The contact limiting block 12 is added to the base 1 to prevent excessive deformation of the contact head of the movable spring 5 when the relay falls in the Y direction.

[0035] The base 1 of the present invention, under the compressed state of the movable spring 5, enhances the characteristics of the base 1 by conforming the shape of the head of the movable spring 5. When the relay falls in the Y+ state, the angles 2 and 3 (as shown) Figure 5 As shown, this feature protects against excessive deformation that could lead to contact pressure failure.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A drop-resistant relay, characterized in that: The anti-drop relay includes a base, a coil disposed on the base, and a yoke disposed on the base. A stationary contact is disposed on the base, and an armature assembly is disposed on the yoke. A movable spring that is linked to the armature assembly is disposed on a movable contact that is either open or closed with the stationary contact. An armature receiving cavity is disposed on the base for inserting the armature assembly. The lower part of the armature limiting block assembly is placed in the armature receiving cavity. An initial preset distance is set between the armature limiting block assembly and the armature assembly. The movable spring is integrally bent from a sheet material. The movable spring includes at least a first part with one end fixed to the base, a second part for mounting the movable contact, and a third part connecting the first part and the second part. The first part and the third part form an angle of angle 2, and the second part and the third part form an angle of angle 3. Both angle 2 and angle 3 are obtuse angles, and angle 2 is greater than angle 3. A contact limiting block is provided at the position of the moving contact on the base. The contact limiting block is positioned above the moving contact, and an initial distance of 1-3 mm is set between the contact limiting block and the moving contact.

2. The anti-drop relay as described in claim 1, characterized in that: The armature limiting block assembly is disposed below the armature assembly; the first part is formed by the intersection of a first plane and a second plane, the first plane and the second plane forming an angle of angle 1, the angle 1 being an obtuse angle, and the angle 1 being greater than the angle 2.

3. The anti-drop relay as described in claim 1, characterized in that: The armature limiting block assembly includes a first armature limiting block and a second armature limiting block located in the armature receiving cavity. The first armature limiting block is located at the connection between the armature assembly and the movable spring, and the second armature limiting block is located in the middle of the armature assembly.

4. The drop-resistant relay as described in claim 3, characterized in that: The preset distance between the first armature limiting block and the armature assembly is 0.2-1mm.

5. The anti-drop relay as described in claim 3, characterized in that: The first armature limiting block is a strip-shaped connector distributed along the Y direction, which is perpendicular to the front plane.

6. The drop-resistant relay as described in claim 5, characterized in that: The surface of the first armature limiting block facing the armature assembly is an inclined surface with the same slope as the armature assembly at the corresponding position.

7. The drop-resistant relay as described in claim 3, characterized in that: The second armature limiting block is disposed to the left of the first armature limiting block, and the second armature limiting block is located at the bend in the middle of the armature assembly. The second armature limiting block is a block structure.

8. The anti-drop relay as described in claim 7, characterized in that: The surface of the second armature limiting block that faces the armature assembly is a curved surface that matches the curvature of the armature assembly at the corresponding position.

9. A drop-resistant relay as described in claim 8, characterized in that: The preset distance between the second armature limiting block and the armature assembly is 1-2mm.

10. A drop-resistant relay as described in claim 1, characterized in that: The base is provided with a receiving cavity that accommodates the movable spring and has the same shape as the movable spring, and the receiving cavity is provided with the contact limiting block.

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