Contact structure and relay

Abstract

The utility model discloses a contact structure and relay. Contact structure includes: spring leaf, contact, install in spring leaf with riveting mode, and contact includes at least two successive linkages cylinder, and the cross section area of each cylinder gradually reduces to the direction away from spring leaf to make the step surface between every two adjacent cylinders. In the contact structure of the utility model, contact is installed on spring leaf through riveting mode, and contact is equipped with step surface, and the contact of contact is the contact between silver layer, avoids the situation of copper base material bare, thereby avoids the mutual bonding situation between contact.

Description

Technical Field

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

[0002] A relay is an automatic switching element that uses electromagnetic force to drive the movement of mechanical parts. It generally includes a base and a magnetic circuit part disposed on the base, a moving contact, and a stationary contact. When energized, the magnetic part generates electromagnetic force to drive the moving contact and the stationary contact to close or open. The contact material is usually copper as the base material, with a silver layer plated on the outside of the base.

[0003] In this system, the moving or stationary contact is mounted on the moving or stationary spring, and the closed side forms a column. This column has a contact surface. However, when the contact is closed, the edge of this contact surface usually contacts first. Because the silver layer is relatively thin, after long-term use, the silver layer at the edge is consumed, causing subsequent contacts to stick together when they close. This results in the inability of the contacts to disconnect effectively and quickly. Utility Model Content

[0004] To address at least one problem existing in the prior art, according to one aspect of the present invention, a contact structure is provided, comprising:

[0005] Reed;

[0006] The contact is riveted to the spring and includes at least two sequentially connected pillars. The cross-sectional area of ​​each pillar gradually decreases in the direction away from the spring so that a stepped surface is formed between each pair of adjacent pillars.

[0007] In some embodiments, the contact is provided with a slot, and the reed is engaged in the slot.

[0008] In some embodiments, the contact includes a first sub-contact and a second sub-contact located on opposite sides of the reed, both the first sub-contact and the second sub-contact including the column and the stepped surface.

[0009] In some embodiments, the cross-sectional area of ​​each column in the first sub-contact is greater than the cross-sectional area of ​​each column in the second sub-contact.

[0010] In some embodiments, the cross-sectional area of ​​each column of the first sub-contact is the same as the cross-sectional area of ​​each column at the corresponding position of the second sub-contact.

[0011] In some embodiments, the contact point has a stepped surface.

[0012] Another aspect of this utility model provides a relay, comprising:

[0013] The housing; the contact structure described above, wherein the contact structure is disposed within the housing.

[0014] In some embodiments, the spring is a stationary spring, and a limiting rib is provided on the inner wall of the housing, the limiting rib being disposed toward the stationary spring to limit the displacement of the stationary spring.

[0015] In some embodiments, the limiting ribs are provided on both sides of the contact point on the outer casing along the length direction of the stationary spring.

[0016] In summary, the contact structure and relay provided by this utility model have the following technical effects:

[0017] 1) When installing the contacts onto the spring, they are installed by riveting. During riveting, multiple pillars are formed, and a stepped surface is formed between each pair of adjacent pillars. That is, except for the pillar that contacts the spring, the other pillars are made of silver metal. When the contacts are closed, the contact is between the silver layers. The pillar that contacts the spring has a much lower chance of contacting other pillars when the contacts are closed. Therefore, copper exposure is avoided, and the contacts are prevented from sticking together.

[0018] 2) By setting limit ribs inside the housing opposite to the spring, the limit ribs can limit the movement of the spring, avoid excessive shaking of the spring and deformation, and ensure the service life of the contact structure. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the contact structure of the first embodiment of the present invention;

[0020] Figure 2 for Figure 1 Enlarged view of point I in the middle;

[0021] Figure 3 for Figure 1 A schematic diagram of the contact structure in the diagram;

[0022] Figure 4 This is a schematic diagram of the structure of the relay according to the second embodiment of the present invention;

[0023] Figure 5 This is a schematic diagram of the outer shell and spring sheet of the second embodiment of the present invention.

[0024] Attached diagram: 100-Contact structure, 10-Spring, 20-Contact, 21-Column, 22-Stepped surface, 23-Slot, 24-First sub-contact, 25-Second sub-contact, 200-Relay, 210-Housing, 220-Limiting rib. Detailed Implementation

[0025] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0026] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0028] The present invention will now be described in further detail with reference to the accompanying drawings.

[0029] The contacts in a relay are used to close or open with each other to connect or disconnect a circuit. Contacts typically consist of copper metal as the base material and a silver plating layer applied to the copper to ensure stability during closure. However, if the contacts close with their edges first, over time the silver plating may wear off, exposing the copper base material. This can lead to copper-silver adhesion when subsequent contacts close.

[0030] Please see Figures 1 to 3 The contact structure 100 provided in this embodiment of the utility model includes a reed 10 and a contact 20 disposed on the reed 10.

[0031] The contact 20 is installed on the spring 10 by riveting. The contact 20 includes at least two columns 21 connected in sequence. The cross-sectional area of ​​each column 21 gradually decreases in the direction away from the spring 10, so that a stepped surface 22 is formed between each two adjacent columns 21.

[0032] The contact structure 100 described above is installed by riveting when the contact 20 is mounted on the spring 10. At the same time, multiple pillars 21 are formed during riveting. A stepped surface 22 is formed between each pair of adjacent pillars 21. That is, except for the pillar 21 that contacts the spring 10, the material of the other pillars 21 is silver metal. When the contacts 20 are closed, the contact is between the silver layers. The chance of the pillar 21 that contacts the spring 10 coming into contact with other pillars 21 is greatly reduced when the contacts 20 are closed. Therefore, the copper is not exposed and the contacts 20 are not stuck together.

[0033] Please refer to Figure 3 In order to facilitate the riveting connection between the contact 20 and the spring 10, the contact 20 is provided with a slot 23 in the initial state, and the spring 10 is locked in the slot 23. The slot 23 can be used to initially position the contact 20 on the spring 10, ensuring the accuracy of the installation during subsequent riveting.

[0034] Furthermore, in this embodiment, the aforementioned column 21 is formed during riveting. Thus, during riveting, due to the ductility of silver, except for the column 21 that is in contact with the spring 10, the other columns 21 are all silver layers. When the contacts 20 are closed, the silver layers are consumed first, thus avoiding the silver material on the surface of the copper substrate of the column 21 that is in contact with the spring 10 being consumed and causing the contacts 20 to stick together.

[0035] In one embodiment, see Figure 3 To facilitate the forming of the contact 20, in this embodiment, the contact 20 has only one stepped surface 22. That is, the structure on one side of the spring 10 for closing with other contacts includes two pillars 21, with a stepped surface 22 formed between the two pillars 21. Thus, by having only one stepped surface 22, the contact 20 structure is simpler and easier to form. In other embodiments, three, four, or more pillars 21 can be provided as needed.

[0036] In this embodiment, the column 21 is cylindrical in shape; in other embodiments, it may also be square. Furthermore, the contact surface on the column 21 for closing can be either a plane or a sphere; there is no limitation on this.

[0037] In one embodiment, please refer to Figure 2 and Figure 3When the relay has a multi-contact structure, with one normally open contact and the other normally closed contact, the normally open and normally closed contacts are located on opposite sides of the reed 10. That is, in this embodiment, two closed points are provided on one reed. Specifically, the contact 20 includes a first sub-contact 24 and a second sub-contact 25 located on opposite sides of the reed 10. Both the first sub-contact 24 and the second sub-contact 25 include a column 21 and a stepped surface 22. The first sub-contact 24 and the second sub-contact 25 (one normally open contact and one normally closed contact) can be formed simultaneously on the reed 10 by riveting, so as to facilitate the forming of the two contacts on the reed.

[0038] In one embodiment, when two contacts 20 are formed on a reed 10, for example Figure 2 and Figure 3 As shown, the cross-sectional area of ​​each column 21 in the first sub-contact 25 is greater than the cross-sectional area of ​​each column 21 in the second sub-contact 24. This is equivalent to the cross-sectional area of ​​one contact 20 on one side of the reed 10 being greater than the cross-sectional area of ​​the contact 20 on the other side of the reed 10. The difference in cross-sectional areas on both sides ensures the stability of the contact 20 when it is locked onto the reed 10.

[0039] In another embodiment, the cross-sectional area of ​​each column 21 of the first sub-contact 25 and the cross-sectional area of ​​each column 21 at the corresponding position of the second sub-contact 24 are set to be the same, that is, the first sub-contact 25 and the second sub-contact 24 on both sides of the reed 10 have the same structural size, so as to facilitate the forming of the entire contact 20 on the reed 10.

[0040] Please see Figure 3 To ensure the molding cost and efficiency of the contact structure 100, a stepped surface 22 is provided on one side of the spring 10, that is, two pillars 21 are provided on each side of the spring 10. The material of each pillar 21 away from the spring 10 is silver. This avoids adhesion when the contacts 20 are closed together, and also facilitates the molding of the entire contact 20, ensuring the molding efficiency of the entire contact structure 100 and reducing production costs.

[0041] The aforementioned contact structure 100, by setting pillars 21 on the contacts 20 to form stepped surfaces 22 between the pillars 21, except for the pillar 21 connected to the spring 10, the other pillars 21 are made of silver. When the contacts 20 are closed, the contact is between the silver layers. The pillar 21 that contacts the spring 10 has a greatly reduced chance of contacting other pillars 21 when the contacts 20 are closed. Therefore, the copper is not exposed, and the contacts 20 are not stuck together.

[0042] Please see Figure 4 and Figure 5The relay 200 provided in the second embodiment of this utility model includes a housing 210 and the contact structure 100 described above.

[0043] The contact structure 100 is disposed inside the housing 210, and the housing 210 protects the contact structure 100 from being exposed.

[0044] It is understood that the relay 200 in this embodiment also includes a coil, an iron core, a yoke, a magnet, and structures such as coil leads and reed leads.

[0045] Furthermore, when the spring 10 in the contact structure 100 of this embodiment is a stationary spring 10 and the contact 20 is set as a stationary contact 20, since the stationary spring 10 is in a suspended state and is not fixed or limited by a structure, when the relay 200 is impacted or weakened, the stationary spring 10 will shake significantly or even deform. When the stationary spring 10 moves too many times and reaches its fatigue limit, there is a risk of breakage. Therefore, in order to protect the stationary spring 10, a limiting rib 220 is provided on the inner wall of the housing 210. The limiting rib 220 is set towards the spring 10 to limit the displacement of the spring 10. Thus, by setting the limiting rib 220, when the relay 200 is subjected to external force, if the spring 10 moves and moves in the direction of the limiting rib 220, it will resist the limiting rib 220, and the limiting rib 220 will limit the displacement of the spring 10, preventing the spring 10 from moving too much, so as to ensure the service life of the spring 10.

[0046] Furthermore, in order to enhance the limiting effect, limiting ribs 220 are provided on both sides of the contact 20 on the outer shell 210 along the length direction of the reed 10. By setting the limiting ribs 220 at multiple positions, multiple positions of the reed 10 can be limited, further enhancing the limiting effect.

[0047] The relay 200 described above has a limiting rib 220 provided inside the housing 210 opposite to the spring 10. The limiting rib 220 can limit the movement of the spring 10, preventing the spring 10 from shaking too much and causing deformation, thus ensuring the service life of the contact structure 100.

[0048] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A contact structure (100), characterized in that, include: Reed (10); Contact (20) is riveted to the spring (10). The contact (20) includes at least two sequentially connected pillars (21). The cross-sectional area of ​​each pillar (21) gradually decreases in the direction away from the spring (10) so that a stepped surface (22) is formed between each two adjacent pillars (21).

2. The contact structure (100) according to claim 1, characterized in that, The contact (20) is provided with a slot (23), and the spring (10) is engaged in the slot (23).

3. The contact structure (100) according to claim 1 or 2, characterized in that, The contact (20) includes a first sub-contact (24) and a second sub-contact (25) located on opposite sides of the reed (10). Both the first sub-contact (24) and the second sub-contact (25) include the column (21) and the stepped surface (22).

4. The contact structure (100) according to claim 3, characterized in that, The cross-sectional area of ​​each of the pillars (21) in the first sub-contact (24) is greater than the cross-sectional area of ​​each of the pillars (21) in the second sub-contact (25).

5. The contact structure (100) according to claim 3, characterized in that, The cross-sectional area of ​​each column (21) of the first sub-contact (24) is the same as the cross-sectional area of ​​each column (21) at the corresponding position of the second sub-contact (25).

6. The contact structure (100) according to claim 1 or 2, characterized in that, The contact point (20) is provided with the stepped surface (22).

7. A relay (200), characterized in that, include: Outer shell (210); The contact structure (100) as described in any one of claims 1-6 is disposed within the housing (210).

8. The relay (200) according to claim 7, characterized in that, The spring (10) is a stationary spring, and the inner wall of the outer shell (210) is provided with a limiting rib (220), which is arranged towards the stationary spring to limit the displacement of the stationary spring (10).

9. The relay (200) according to claim 8, characterized in that, Along the length of the stationary spring (10), the housing (210) is provided with limiting ribs (220) on both sides of the contact (20).

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