Relay contact structure and relay
By designing a high-voltage contact element on the surface of the relay contacts, the problem of ice film formation in low-temperature environments is solved, enabling reliable contact of the contacts under low-temperature conditions and improving the reliability and stability of the relay in specific applications.
Patent Information
- Application Number
- CN202420944479.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-30
- Publication Date
- 2025-11-11
- Estimated Expiration
- 2034-04-30
AI Technical Summary
Existing relays are prone to forming ice film on their contact surfaces in low-temperature environments, leading to poor contact and an inability to effectively monitor equipment operation. This is especially true in applications such as rail transit, electric vehicle charging stations, photovoltaic energy storage, and 5G base stations, where conventional relays cannot effectively break through the ice film, resulting in equipment failure.
Design a relay contact structure that increases contact pressure by setting a high-voltage contacting part on the contact surface and using mechanical force to break the ice film. This includes setting grooves, ribs, or protrusions on the contact surface to ensure reliable contact of the contacts under low-temperature conditions.
This improves the reliability and stability of the relay under low-temperature conditions, ensuring that the contacts can effectively conduct under small loads and preventing equipment failure.
Smart Images
Figure CN223539529U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of relay technology, specifically to a relay contact structure and a relay. Background Technology
[0002] A type of relay uses contacts to switch small load voltage and current signals to monitor the operating status of equipment and provide safety feedback control signals. When used in applications such as rail transit, electric vehicle charging stations, photovoltaic energy storage, and 5G base stations, these relays often need to withstand harsh outdoor conditions, such as extremely low temperatures in winter and changes in ambient humidity. Conventional relays typically contain some moisture, which is even higher in high-humidity environments. When moisture is present inside the relay and the temperature drops below freezing, the moisture condenses on the contact surface, forming an ice film. At low load voltages, this ice film cannot be broken down, and at low load currents, the heat generated inside the relay is insufficient to melt it. This leads to increased contact resistance at the relay contacts, and may even result in contact failure, preventing effective monitoring of equipment operation and causing equipment malfunction. Utility Model Content
[0003] To address the shortcomings of existing technologies, this utility model provides a relay contact structure that primarily solves the technical problem that existing relays using contacts to switch small load voltage and current signals are prone to failure due to the formation of ice film on the contact surface in low-temperature environments.
[0004] To achieve the above objectives, this utility model is implemented through the following technical solution:
[0005] A relay contact structure includes a first contact and a second contact disposed opposite to each other, wherein the first contact and / or the second contact are provided with a high-pressure abutment part for increasing the contact pressure between the first contact and the second contact.
[0006] Furthermore, the contact surface of the first contact has a spherical structure, and a groove is provided only at the center of the contact surface of the first contact. The contact surface of the second contact has a spherical or planar structure, and a high-pressure abutment part is formed at the edge of the opening end of the groove to cooperate with the contact surface of the second contact.
[0007] Furthermore, a protruding annular rib is provided at the center or edge of the contact surface of the first contact point, and the annular rib forms a high-pressure abutment part for cooperating with the contact surface of the second contact point.
[0008] Furthermore, the contact surface of the first contact point has a spherical or planar structure, and the contact surface of the second contact point also has a spherical or planar structure.
[0009] Furthermore, a protruding protrusion is provided at the center of the contact surface of the first contact and / or the center of the contact surface of the second contact, forming a high-pressure contact part. The contact surface of the first contact is spherical or planar, and the contact surface of the second contact is spherical or planar.
[0010] Furthermore, a protruding elongated rib is provided at the center of the contact surface of the first contact, and a groove corresponding to the elongated rib is provided at the center of the contact surface of the second contact. A high-pressure contact part is formed by the elongated rib and the edge of the opening end of the groove. When the first contact and the second contact are closed, the elongated rib on the first contact presses against the edge of the opening end of the groove of the second contact.
[0011] Furthermore, a protruding elongated rib is provided at the center of the contact surface of the first contact, and a corresponding protrusion is provided at the center of the contact surface of the second contact. The elongated rib and the protrusion form a high-pressure contact part. When the first contact and the second contact are closed, the elongated rib on the first contact and the protrusion on the second contact form a contact engagement.
[0012] Furthermore, a protruding elongated rib is provided at the center of the contact surface of the first contact, and an annular rib corresponding to the elongated rib is provided at the center of the contact surface of the second contact. The elongated rib and the annular rib form a high-pressure contact part. When the first contact and the second contact are closed, the elongated rib on the first contact and the annular rib on the second contact form a contact engagement.
[0013] Furthermore, the first contact is one of a static contact structure and a moving contact structure, and the second contact is the other of a static contact structure and a moving contact structure. The high-pressure abutment part is configured to produce a mechanical ice-breaking effect on the ice film formed on the contact surface of the first contact and / or the second contact.
[0014] Based on the same inventive concept, this utility model also provides a relay, including any of the relay contact structures described above.
[0015] The above technical solution has the following advantages or beneficial effects:
[0016] In the relay contact structure and relay described in this utility model, when the first contact and the second contact are closed, the high-voltage contact action part increases the contact pressure when the first contact and the second contact are closed, thereby using the high-voltage contact action part to break the ice film on the contact surface, thereby improving the reliability and stability of the relay product in low temperature and low load applications. Attached Figure Description
[0017] Figure 1 This is a three-dimensional structural diagram of the first contact point in Embodiment 1 of this utility model.
[0018] Figure 2 This is a cross-sectional view of the structure when the first contact and the second contact are closed according to Embodiment 1 of this utility model.
[0019] Figure 3 This is a three-dimensional structural diagram of the first contact point in Embodiment 2 of this utility model.
[0020] Figure 4 This is a side view of the first contact point in Embodiment 2 of this utility model.
[0021] Figure 5 This is a cross-sectional view of the structure when the first contact and the second contact are closed according to Embodiment 2 of this utility model.
[0022] Figure 6 This is a three-dimensional structural diagram of the first contact point in Embodiment 3 of this utility model.
[0023] Figure 7 This is a side view of the first contact point in Embodiment 3 of this utility model.
[0024] Figure 8 This is a cross-sectional view of the structure when the first contact and the second contact are closed in Embodiment 3 of this utility model.
[0025] Figure 9 This is a cross-sectional view of the structure when the first contact and the second contact are closed in Embodiment 4 of this utility model.
[0026] Figure 10 This is a three-dimensional structural diagram of the first contact point in Embodiment 5 of this utility model.
[0027] Figure 11 This is a three-dimensional structural diagram of the second contact point in Embodiment 5 of this utility model.
[0028] Figure 12 This is a cross-sectional view of the structure when the first contact and the second contact are closed in Embodiment 5 of this utility model (symmetrically divided along the extension direction of the long rib).
[0029] Figure 13 This is a cross-sectional view of the structure of the first contact point and the second contact point when they are closed in Embodiment 5 of this utility model (symmetrically divided perpendicular to the extension direction of the long rib).
[0030] Figure 14 This is a three-dimensional structural diagram of the first contact point in Embodiment Six of this utility model.
[0031] Figure 15 This is a three-dimensional structural diagram of the second contact point in Embodiment Six of this utility model.
[0032] Figure 16This is a cross-sectional view of the structure when the first contact and the second contact are closed in Embodiment Six of this utility model.
[0033] Figure 17 This is a three-dimensional structural diagram of the first contact point in Embodiment Seven of this utility model.
[0034] Figure 18 This is a three-dimensional structural diagram of the second contact point in Embodiment Seven of this utility model.
[0035] Figure 19 This is a cross-sectional view of the structure of the first contact and the second contact when they are closed in Embodiment 7 of this utility model (symmetrically divided along the extension direction of the long rib).
[0036] Figure 20 This is a cross-sectional view of the structure of the first contact point and the second contact point when they are closed in Embodiment 7 of this utility model (symmetrically divided perpendicular to the extension direction of the long rib).
[0037] Figure 21 This is a three-dimensional structural diagram of the first contact point in Embodiment 8 of this utility model.
[0038] Figure 22 This is a side view of the first contact point in Embodiment 8 of this utility model.
[0039] Figure 23 This is a cross-sectional view of the structure when the first contact and the second contact are closed in Embodiment 8 of this utility model.
[0040] Label Explanation:
[0041] 1. First contact point, 2. Second contact point, 3. Groove, 4. Annular rib, 5. Protrusion, 6. Long rib. Detailed Implementation
[0042] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0043] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., 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.
[0044] Example 1
[0045] Please refer to the appendix. Figure 1 Appendix Figure 2One embodiment of this utility model provides a relay contact structure, including a first contact 1 and a second contact 2 disposed opposite to each other. The first contact 1 and / or the second contact 2 are provided with a high-pressure abutment portion for increasing the contact pressure between the first contact 1 and the second contact 2. The high-pressure abutment portion is configured to mechanically break up an ice film formed on the contact surface of the first contact 1 and / or the second contact 2. In this embodiment, preferably, the contact surface of the first contact 1 has a spherical structure, and a groove 3 is formed only at the center of the contact surface of the first contact 1. The contact surface of the second contact 2 has a spherical structure or a planar structure. In this embodiment, preferably, the contact surface of the second contact 2 has a spherical structure (arc surface), and a high-pressure abutment portion for cooperating with the contact surface of the second contact 2 is formed at the edge of the opening end of the groove 3. It is understood that in this embodiment, since the contact surface of the first contact 1 has a spherical structure and the edge of the opening of the groove 3 forms a relatively sharp protruding structure, when it comes into contact with the contact surface of the second contact 2, a high contact pressure will be generated at the contact point. This will better achieve the function of mechanically breaking the ice film on the contact while ensuring that the first contact 1 and the second contact 2 are in contact and conducting, thereby improving the reliability and stability of the relay product in low temperature and low load applications.
[0046] In one preferred embodiment, the first contact 1 is one of a stationary contact structure and a moving contact structure, and the second contact 2 is the other of a stationary contact structure and a moving contact structure. That is, when the first contact 1 is configured as a stationary contact structure, the second contact 2 is configured as a moving contact structure; and when the first contact 1 is configured as a moving contact structure, the second contact 2 is configured as a stationary contact structure.
[0047] One embodiment of this utility model also provides a relay, including the relay contact structure of any of the above embodiments.
[0048] Example 2
[0049] Please refer to the appendix. Figure 3 To be continued Figure 5 The difference between this embodiment and Embodiment 1 is that a protruding annular rib 4 is provided at the center of the contact surface of the first contact 1. The annular rib 4 forms a high-pressure abutment part for cooperating with the contact surface of the second contact 2. When the first contact 1 and the second contact 2 are closed, the protruding tip of the annular rib 4 on the first contact 1 will abut against the contact surface of the second contact 2, thereby increasing the contact pressure at the contact point between the first contact 1 and the second contact 2. This better achieves the function of mechanically breaking the ice film on the contacts while ensuring the contact and conduction between the first contact 1 and the second contact 2, thereby improving the reliability and stability of the relay product in low temperature and low load applications.
[0050] Please refer to the appendix. Figure 3 To be continued Figure 5 In one preferred embodiment, the contact surface of the first contact 1 is spherical or planar, and the contact surface of the second contact 2 is also spherical or planar. Preferably, in this embodiment, both the contact surfaces of the first contact 1 and the second contact 2 are spherical. However, those skilled in the art will understand that in other embodiments, the contact surfaces of the first contact 1 and the second contact 2 may both be planar, or one contact may be spherical while the other is planar.
[0051] Example 3
[0052] Please refer to the appendix. Figure 6 To be continued Figure 8 The difference between this embodiment and Embodiment 1 is that a protruding protrusion 5 is provided at the center of the contact surface of the first contact 1 or the center of the contact surface of the second contact 2. This protrusion 5 forms a high-pressure contact part. The contact surface of the first contact 1 is either spherical or planar, as is the contact surface of the second contact 2. When the first contact 1 and the second contact 2 are closed, the protruding tip of the protrusion 5 on the first contact 1 will abut against the contact surface of the second contact 2. This increases the contact pressure at the contact point between the first contact 1 and the second contact 2, thereby better achieving the mechanical breaking of the contact ice film while ensuring the contact and conduction between the first contact 1 and the second contact 2. This improves the reliability and stability of the relay product under low temperature and low load conditions. In this embodiment, preferably, both the contact surfaces of the first contact 1 and the second contact 2 are spherical. However, those skilled in the art will understand that in other embodiments, the contact surfaces of the first contact 1 and the second contact 2 may both be planar, or one of the contacts may be spherical while the other is planar.
[0053] Example 4
[0054] Please refer to the appendix. Figure 9 The difference between this embodiment and embodiment three is that protruding protrusions 5 are provided at the center of the contact surface of the first contact 1 and the center of the contact surface of the second contact 2. The protrusions 5 form a high-pressure contact part, and the contact surface of the first contact 1 is a spherical structure or a planar structure, while the contact surface of the second contact 2 is a spherical structure or a planar structure.
[0055] Example 5
[0056] Please refer to the appendix. Figure 10 To be continued Figure 13The difference between this embodiment and Embodiment 1 is that a protruding elongated rib 6 is provided at the center of the contact surface of the first contact 1, and a groove 3 corresponding to the elongated rib 6 is provided at the center of the contact surface of the second contact 2. A high-pressure contact part is formed by the elongated rib 6 and the edge of the opening end of the groove 3. When the first contact 1 and the second contact 2 are closed, the elongated rib 6 on the first contact 1 presses against the edge of the opening end of the groove 3 of the second contact 2. When the first contact 1 and the second contact 2 are closed, by making the elongated rib 6 on the first contact 1 press against the edge of the opening end of the groove 3 of the second contact 2, the contact pressure at the contact part of the first contact 1 and the second contact 2 is increased. This better achieves the function of mechanically breaking the ice film on the contacts while ensuring the contact and conduction between the first contact 1 and the second contact 2, thereby improving the reliability and stability of the relay product in low temperature and low load applications. In this embodiment, preferably, the contact surfaces of the first contact 1 and the second contact 2 are both spherical.
[0057] Example 6
[0058] Please refer to the appendix. Figure 14 To be continued Figure 16 The difference between this embodiment and Embodiment 1 is that a protruding elongated rib 6 is provided at the center of the contact surface of the first contact 1, and a corresponding protrusion 5 is provided at the center of the contact surface of the second contact 2. The elongated rib 6 and the protrusion 5 form a high-pressure contact area. When the first contact 1 and the second contact 2 are closed, the elongated rib 6 on the first contact 1 and the protrusion 5 on the second contact 2 form an abutting contact engagement. When the first contact 1 and the second contact 2 are closed, by making the elongated rib 6 on the first contact 1 and the protrusion 5 on the second contact 2 form an abutting contact engagement, the contact pressure at the contact area of the first contact 1 and the second contact 2 is increased. This better achieves the function of mechanically breaking the ice film on the contacts while ensuring the contact and conduction between the first contact 1 and the second contact 2, thereby improving the reliability and stability of the relay product in low temperature and low load applications. In this embodiment, preferably, the contact surfaces of the first contact 1 and the second contact 2 are both spherical.
[0059] Example 7
[0060] Please refer to the appendix. Figure 17 To be continued Figure 20The difference between this embodiment and Embodiment 1 is that a protruding elongated rib 6 is provided at the center of the contact surface of the first contact 1, and a corresponding annular rib 4 is provided at the center of the contact surface of the second contact 2. The elongated rib 6 and the annular rib 4 form a high-pressure contact area. When the first contact 1 and the second contact 2 are closed, the elongated rib 6 on the first contact 1 and the annular rib 4 on the second contact 2 form abutting contact. When the first contact 1 and the second contact 2 are closed, by making the protruding ends of the elongated rib 6 on the first contact 1 and the annular rib 4 on the second contact 2 form abutting contact, the contact pressure at the contact area of the first contact 1 and the second contact 2 is increased. This better achieves the function of mechanically breaking the ice film on the contacts while ensuring the contact and conduction between the first contact 1 and the second contact 2, thereby improving the reliability and stability of the relay product in low temperature and low load applications. In this embodiment, preferably, the contact surfaces of the first contact 1 and the second contact 2 are both spherical. However, those skilled in the art will understand that in other embodiments, the contact surfaces of the first contact 1 and the second contact 2 may both be planar, or one of the contacts may be spherical while the other is planar.
[0061] Example 8
[0062] Please refer to the appendix. Figure 21 To be continued Figure 23 The difference between this embodiment and embodiment two is that a protruding annular rib 4 is provided at the edge of the contact surface of the first contact point 1.
[0063] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model. Therefore, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
Claims
1. A relay contact structure, characterized in that: It includes a first contact (1) and a second contact (2) arranged opposite to each other, and the first contact (1) and / or the second contact (2) are provided with a high-pressure abutment part for increasing the contact pressure between the first contact (1) and the second contact (2).
2. The relay contact structure according to claim 1, characterized in that: The contact surface of the first contact (1) is spherical, and a groove (3) is provided only at the center of the contact surface of the first contact (1). The contact surface of the second contact (2) is spherical or planar, and a high-pressure contacting part is formed at the edge of the opening end of the groove (3) to cooperate with the contact surface of the second contact (2).
3. The relay contact structure according to claim 1, characterized in that: An annular rib (4) is provided at the center or edge of the contact surface of the first contact (1), and the annular rib (4) forms a high-pressure contact part for cooperating with the contact surface of the second contact (2).
4. The relay contact structure according to claim 3, characterized in that: The contact surface of the first contact (1) is spherical or planar, and the contact surface of the second contact (2) is spherical or planar.
5. The relay contact structure according to claim 1, characterized in that: A protruding protrusion (5) is provided at the center of the contact surface of the first contact (1) and / or the center of the contact surface of the second contact (2), forming a high-pressure contact part. The contact surface of the first contact (1) is a spherical structure or a planar structure, and the contact surface of the second contact (2) is a spherical structure or a planar structure.
6. The relay contact structure according to claim 1, characterized in that: A protruding elongated rib (6) is provided at the center of the contact surface of the first contact (1), and a groove (3) corresponding to the elongated rib (6) is provided at the center of the contact surface of the second contact (2). A high-pressure contact part is formed by the elongated rib (6) and the edge of the opening end of the groove (3). When the first contact (1) and the second contact (2) are closed, the elongated rib (6) on the first contact (1) presses against the edge of the opening end of the groove (3) of the second contact (2).
7. The relay contact structure according to claim 1, characterized in that: A protruding elongated rib (6) is provided at the center of the contact surface of the first contact (1), and a corresponding protrusion (5) is provided at the center of the contact surface of the second contact (2). The elongated rib (6) and the protrusion (5) form a high-pressure contact part. When the first contact (1) and the second contact (2) are closed, the elongated rib (6) on the first contact (1) and the protrusion (5) on the second contact (2) form a contact engagement.
8. The relay contact structure according to claim 1, characterized in that: A protruding elongated rib (6) is provided at the center of the contact surface of the first contact (1), and an annular rib (4) corresponding to the elongated rib (6) is provided at the center of the contact surface of the second contact (2). The elongated rib (6) and the annular rib (4) form a high-pressure contact part. When the first contact (1) and the second contact (2) are closed, the elongated rib (6) on the first contact (1) and the annular rib (4) on the second contact (2) form a contact engagement.
9. The relay contact structure according to any one of claims 1 to 8, characterized in that: The first contact (1) is one of the static contact structure and the moving contact structure, and the second contact (2) is the other of the static contact structure and the moving contact structure. The high-pressure contact part is configured to generate a mechanical ice-breaking effect on the ice film formed on the contact surface of the first contact (1) and / or the second contact (2).
10. A relay, characterized in that: Includes the relay contact structure as described in any one of claims 1 to 9.