Relay

Abstract

The utility model discloses a relay, which comprises a first shell and N non-series contact groups accommodated in the first shell, N is greater than or equal to 2, each contact group comprises at least one contact pair, and each contact pair comprises a movable contact and a static contact which are correspondingly matched with each other; the circuit breaker is characterized in that in the N-1 contact groups, the contact surfaces of the movable contacts and / or the static contacts in each contact pair in at least one contact group are provided with a plurality of mutually spaced convex parts, the movable contacts in all the contact groups are driven by the action component to act towards the static contacts, and the convex parts are used for pushing against ice layers on the surfaces of the contacts to realize conduction. According to the utility model, certain heat is generated after the contact group provided with the plurality of mutually spaced protruding parts is conducted, so that the temperature inside the relay is raised, and then ice layers on other contacts are melted, contacted and conducted, thereby improving the contact reliability of the contacts.

Description

Technical Field

[0001] The utility model relates to the technical field of relays, in particular to a relay. Background Art

[0002] In the prior art, relay contacts may freeze due to condensation of water vapor in a low temperature environment, which may affect the closing effect between the contact groups and the switching ability of the corresponding circuit.

[0003] At present, there are two main types of conventional contact combinations for relays, which have the following problems:

[0004] 1. Arc contact and flat contact: When the contacts of this combination are in contact, the pressure at the contact point is small, and the ability to penetrate the ice on the contact surface is weak, so the contacts cannot conduct through the ice layer;

[0005] 2. Arc surface contacts and arc surface contacts: This combination has relatively low silver content in the contacts, poor resistance to electrical wear, and relatively poor electrical life. At the same time, the ability to penetrate ice on the contact surface is also relatively weak, and the contacts cannot conduct through the ice layer. Utility Model Content

[0006] The utility model aims to overcome the deficiencies of the prior art and to provide a relay, which generates a certain amount of heat after a contact group with a plurality of mutually spaced protrusions is turned on, so that the temperature inside the relay rises and the ice layer on other contacts melts and the contacts are turned on, thereby improving the contact reliability of the contacts.

[0007] The technical solution adopted by the utility model to solve its technical problems is: a relay, comprising a first housing and N groups of non-series contact groups contained in the first housing, wherein N≥2, each group of contact groups comprises at least one pair of contact pairs, and each pair of contact pairs comprises corresponding matching moving contacts and static contacts; it is characterized in that: among the N-1 groups of contact groups, the contact surfaces of the moving contacts and / or static contacts in each pair of contact pairs in at least one group of contact groups are set as a plurality of mutually spaced protrusions, and the moving contacts in all the contact groups are driven by the action components to move toward the static contacts, and the protrusions are used to break the ice layer on the contact surface to achieve conduction.

[0008] The action component is a moving reed which is driven by the magnetic circuit part of the relay.

[0009] The moving contacts in all contact groups are driven by the same action component and move toward the static contact at the same time; the action component is a load-carrying reed or a non-load-carrying reed.

[0010] The plurality of mutually spaced protrusions are arranged to form a grid-type contact structure.

[0011] The grid-type contact structure is formed with voids that intersect each other in a grid pattern on the contact surface of the contact, or the grid-type contact structure is formed with a plurality of void strips that intersect vertically and horizontally on the surface of the contact; the N groups of non-series-connected contact groups are respectively connected in parallel.

[0012] The contact surface of the contact of the grid-type contact structure is a plane or a curved surface.

[0013] It further includes a second housing sleeved outside the relay, and the second housing has an opening; the relay is inserted into the second housing through the opening of the second housing, and the lead-out pins of the relay extend out of the opening; a sealing structure is provided between the opening of the second housing and the relay, and a corresponding sealing structure is formed between the relay and the second housing through a sealant, so that an airtight cavity is formed between the first housing and the second housing of the relay.

[0014] The N groups of non-series-connected contact groups are sealed in the first housing through a sealant; the contact pairs in each group of contact groups are connected in series.

[0015] The sealing structure is a whole-layer sealant layer covering the opening of the second housing.

[0016] The second housing is further provided with a positioning structure for the first housing of the relay, so that an airtight cavity is formed between the bottom surface and / or the four side walls of the first housing and the second housing of the relay.

[0017] At the four corners of the bottom surface of the second housing, there are also bosses as the positioning structure, and the relay inserted into the second housing is placed on the bosses, so that an airtight cavity is formed between the bottom surface of the first housing and the second housing of the relay; and / or; on the four side surfaces of the second housing, there are also ribs as the positioning structure, and the side surface of the relay inserted into the second housing abuts against the ribs, so that an airtight cavity is formed between the side surface of the first housing and the second housing of the relay.

[0018] In the second housing, there is also a closable vent hole.

[0019] Compared with the prior art, the beneficial effects of the present utility model are:

[0020] 1. In the N - 1 groups of contact groups of the present utility model, in at least one group of contact groups, the contact surfaces of the moving contacts and / or the static contacts in each pair of contact pairs are set as a plurality of mutually spaced convex portions, so that the contact group provided with the plurality of mutually spaced convex portions first conducts through the convex portions crushing the ice layer on the contact, and after conduction, a certain amount of heat will be generated, causing the temperature inside the relay to rise, and then melting the ice layer on other contacts to achieve contact conduction, thereby improving the contact reliability of the contacts.

[0021] 2. The grid-type contact structure is formed with voids that intersect each other in a grid pattern on the contact surface of the contact, or the grid-type contact structure is formed with multiple void strips that intersect vertically and horizontally on the surface of the contact. When N groups of contact groups are connected in parallel, current shunting is achieved, reducing contact wear. In addition, in this way, when the contacts are electrically worn, a certain group of contacts will not be consumed fixedly, and the contact groups can be consumed alternately, with stronger anti-electric wear ability, thereby ensuring the electrical durability life.

[0022] 3. The present invention further includes a second outer casing sleeved outside the relay. The relay is inserted into the second outer casing through the mouth of the second outer casing. The second outer casing prevents the first casing of the relay from bulging and deforming outward, and thus prevents cracking between the first casing and the sealant, further reducing the problem of ice layer thickening at the contact position due to external environmental factors. A sealing structure is provided between the mouth of the second outer casing and the relay to further enhance the sealing performance.

[0023] 4. An airtight cavity is formed between the first outer casing and the second outer casing of the relay of the present invention, so as to utilize the heat insulation property of the gas to melt the ice layer on the contacts of the internal traditional structure as soon as possible, ensuring connection as soon as possible.

[0024] The present invention will be further described in detail below with reference to the drawings and embodiments; however, a relay of the present invention is not limited to the embodiments. Description of the Drawings

[0025] Figure 1 is a schematic structural diagram of the relay according to Embodiment 1 of the present invention;

[0026] Figure 2 is a schematic structural diagram of the contact group according to Embodiment 1 of the present invention;

[0027] Figure 3 is a schematic structural diagram of the grid-type contact structure of the contact group according to Embodiment 1 of the present invention;

[0028] Figure 4 is a schematic current diagram of the relay according to Embodiment 1 of the present invention;

[0029] Figure 5 is a schematic structural diagram of the contact group according to Embodiment 2 of the present invention;

[0030] Figure 6 is a schematic structural diagram of the contact group according to Embodiment 3 of the present invention;

[0031] Figure 7 is a schematic structural diagram of the contact group according to Embodiment 4 of the present invention;

[0032] Figure 8 is a schematic structural diagram of the contact group according to Embodiment 5 of the present invention;

[0033] Figure 9 It is a schematic diagram of the current of the relay according to the fifth embodiment of the present utility model;

[0034] Figure 10 It is a schematic diagram of the current of the relay according to the sixth embodiment of the present utility model;

[0035] Figure 11 It is a schematic cross-sectional view of the relay according to the seventh embodiment of the present utility model;

[0036] Figure 12 is Figure 11 an enlarged schematic view of part A;

[0037] Figure 13 It is a schematic structural view of the second housing according to the seventh embodiment of the present utility model. Detailed implementation manners

[0038] Embodiment 1

[0039] Referring to Figures 1-4 As shown, a relay of the present utility model includes a first housing 21 and two groups of non - series contact groups accommodated in the first housing 21. Each group of contact groups includes a pair of contact pairs, and each pair of contact pairs includes a movable contact and a static contact that are correspondingly matched; among the two groups of contact groups, the contact surface of the movable contact in one of the contact groups is provided with a plurality of mutually spaced convex portions, and the movable contacts in all contact groups are driven by the same actuating member to move towards the static contacts simultaneously, and the convex portions are used to break the ice layer on the contact surface of the contacts when the contacts come into contact. The plurality of mutually spaced convex portions are arranged in a grid - type contact structure.

[0040] In this embodiment, the movable contacts in all contact groups are driven by the same actuating member to move towards the static contacts simultaneously. In other embodiments, it can be

[0041] In this embodiment, the two groups of contact groups are in parallel. The contact surface of the movable contact 11 in one of the contact groups is an arc surface, the contact surface of the static contact 12 is a plane, and in the other group of contact groups, one contact is a grid - type contact structure 10. The grid - type contact structure 10 is provided on the movable contact 13, the contact surface of this movable contact 13 is an arc surface, and the contact surface of the static contact 14 in the other group of contact groups is a plane.

[0042] In this embodiment, the grid - type contact structure 10 on the movable contact 13 forms voids that intersect with each other in a grid shape on the contact surface of the contact. Specifically, the grid - type contact structure 10 forms a plurality of void strips that intersect vertically and horizontally on the surface of the contact, that is, a plurality of longitudinal void strips 101 and a plurality of transverse void strips 102, and the longitudinal void strips 101 and the transverse void strips 102 intersect perpendicularly; in other embodiments, the longitudinal void strips 101 and the transverse void strips 102 intersect to form an angle less than 90 degrees.

[0043] In this embodiment, the moving component is a moving reed that is driven by the magnetic circuit part of the relay, and the moving component is the current-carrying moving reed 6.

[0044] In this embodiment, the above two groups of parallel contact groups are sealed in the first housing 21 with sealant.

[0045] For a relay of the present utility model, in N - 1 groups of contact groups, on at least one group of contact groups, the contact surfaces of each pair of moving and / or static contacts in each pair of contacts are provided with a plurality of mutually spaced convex portions, so that the contact group provided with the plurality of mutually spaced convex portions first conducts through the convex portions crushing the ice layer on the contacts. After conduction, a certain amount of heat will be generated, causing the temperature inside the relay to rise, and then melting the ice layer on other contacts to achieve contact conduction, thereby improving the contact reliability of the contacts.

[0046] For a relay of the present utility model, the grid - type contact structure is to form voids that intersect with each other in a grid shape on the contact surface of the contact, or the grid - type contact structure is to form a plurality of intersecting void strips in the vertical and horizontal directions on the surface of the contact. When N groups of contact groups are in parallel, it realizes current shunting and reduces contact wear; in addition, in this way, when the contacts are electrically worn, a certain group of contacts will not be fixedly consumed, and the contact groups can rotate and consume each other, with stronger anti - electrical wear ability, thereby ensuring the electrical endurance life.

[0047] Embodiment Two

[0048] See Figure 5 As shown, for a relay of the present utility model, the difference from Embodiment One is that the grid - type contact structure 10 is provided on the static contact 14.

[0049] Embodiment Three

[0050] See Figure 6 As shown, for a relay of the present utility model, the difference from Embodiment One is that the grid - type contact structure 10 is provided on the corresponding moving contact 13 and static contact 14.

[0051] Embodiment Four

[0052] See Figure 7 As shown, for a relay of the present utility model, the difference from Embodiment One is that it includes four groups of parallel contact groups, namely moving contact 11, static contact 12, moving contact 13, static contact 14, moving contact 15, static contact 16, moving contact 17, static contact 18; the grid - type contact structure 10 is provided on one of the static contacts 18. The moving component is a non - current - carrying moving reed 7.

[0053] Embodiment Five

[0054] See Figures 8-9As shown, a relay of the present utility model is different from that of the first embodiment in that it includes two sets of contact groups connected in parallel. The two ends of the two contact groups are respectively led out through the same lead-out pin, and each contact group includes two pairs of contact pairs, and the two pairs of contact pairs in each group are connected in series. Specifically, the moving contact 11, the static contact 12, the moving contact 17, and the static contact 18 are connected in series, and the moving contact 13, the static contact 14, the moving contact 15, and the static contact 16 are connected in series. The moving contact 11, the static contact 12, the moving contact 17, the static contact 18, the moving contact 13, the static contact 14, the moving contact 15, and the static contact 16 are connected in parallel; the grid-type contact structure 10 is arranged on the static contacts of each pair of contacts in one of the contact groups, that is, the static contact 12 and the static contact 18. Of course, it can also be arranged on the moving contacts of each pair of contacts, or it can be a combination. The actuating member is a non-current-carrying moving reed 8.

[0055] Embodiment Six

[0056] See Figure 10 As shown, a relay of the present utility model is different from that of the fifth embodiment in that the two contact groups can be connected in parallel outside the first housing 21 of the relay 2, or can be two independent circuits respectively.

[0057] Embodiment Seven

[0058] See Figures 11-13 As shown, a relay of the present utility model is different from the above embodiments in that it further includes a second housing 3 sleeved outside the relay 2, and the second housing 3 has an opening 31. The relay is inserted into the second housing 3 through the opening 31 of the second housing 3, and the lead-out pin 22 of the relay 2 extends out of the opening 31. A sealing structure 5 is provided between the opening 31 of the second housing 3 and the relay, so that an airtight cavity 4 is formed between the first housing 21 of the relay 2 and the second housing 3.

[0059] In this embodiment, a corresponding sealing structure is formed between the relay 2 and the second housing 3 by sealant. The sealing structure is a whole-layer sealant layer 5 covering the opening 31 of the second housing 3. Since the present utility model adopts the sealing structure of the whole-layer sealant layer covering the opening of the second housing, the bonding strength between the first housing of the plastic-sealed relay body, the glue, and the pins and the glue can be enhanced, and moisture in the air can be prevented from entering the relay interior.

[0060] In this embodiment, the second housing 3 is further provided with a positioning structure for the first housing 21 of the relay 2, so as to form the airtight cavity 4 between the bottom surface and the four side walls of the first housing 21 of the relay 2 and the second housing 3. Specifically, at the four corners of the bottom surface of the second housing 3, there are also provided bosses 32 as the positioning structure. The relay 2 installed in the second housing 3 is placed on the bosses 32, so as to form a corresponding airtight cavity 4 between the bottom surface of the first housing 21 of the relay 2 and the second housing 3. On the peripheral side surfaces of the second housing 3, there are also provided ribs 33 as the positioning structure. The side surface of the relay 2 installed in the second housing 3 abuts against the ribs 33, so as to form a corresponding airtight cavity 4 between the side surface of the first housing 21 of the relay 2 and the second housing 3.

[0061] In this embodiment, in the second housing 3, there is also provided a closable vent hole 34. Since the present utility model adopts the structure that there is also provided a closable vent hole in the second housing. With this structure of the present utility model, when the pressure of the gas inside the plastic-sealed relay body becomes larger due to heat, the gas in the airtight cavity can be discharged through the vent hole, ensuring the reliability of the sealing structure at the mouth part.

[0062] For a relay of the present utility model, since it further includes a second housing 3 sleeved outside the relay 2, the relay 2 is installed in the second housing 3 through the mouth part 31 of the second housing 3. By means of the second housing 3, it is avoided that the first housing 21 of the relay 2 bulges and deforms outward, resulting in cracking between the first housing 21 and the sealant, thereby reducing the problem of the ice layer at the contact position thickening due to external environmental factors. And a sealing structure is provided between the mouth part 31 of the second housing 3 and the relay 2 to further enhance the sealing performance.

[0063] For a relay of the present utility model, an airtight cavity 4 is formed between the first housing 21 of the relay 2 and the second housing 3, so as to utilize the heat insulation of the gas to quickly melt the ice layer on the contacts of the internal traditional structure and ensure quick connection.

[0064] The above is only the preferred embodiment of the present utility model, and does not impose any form of limitation on the present utility model. Although the present utility model has been disclosed above with the preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make many possible changes and modifications to the technical solution of the present utility model by using the disclosed technical content above, or modify it into an equivalent equivalent embodiment. Therefore, any simple modification, equivalent change and modification made to the above embodiment according to the technical essence of the present utility model without departing from the technical solution of the present utility model shall fall within the scope of the technical solution protected by the present utility model.

Claims

1. Relay, comprising a first housing and N groups of non - series contact groups accommodated within the first housing, wherein, N≥2, each set of contact groups includes at least one pair of contact pairs, and each pair of contact pairs includes a movable contact and a stationary contact that cooperate with each other; characterized in that: in N - 1 sets of contact groups, in at least one set of contact groups, the contact surfaces of the movable contacts and / or the stationary contacts in each pair of contact pairs are provided with a plurality of spaced - apart convex portions, and the movable contacts in all contact groups are driven by an actuating member to move towards the stationary contacts, and the convex portions are used to crush the ice layer on the contact surface to achieve conduction.

2. The relay according to claim 1, wherein: The actuating member is a movable reed that is driven to move by the magnetic circuit part of the relay.

3. The relay according to claim 1, characterized in that: The movable contacts in all contact groups are driven by the same actuating member to move towards the stationary contacts simultaneously; the actuating member is a current - carrying reed or a non - current - carrying reed.

4. The relay according to claim 1, wherein: The plurality of spaced - apart convex portions are arranged in a grid - type contact structure.

5. The relay according to claim 4, wherein: The grid - type contact structure is formed with voids that cross each other in a grid pattern on the contact surface of the contact, or the grid - type contact structure is formed with a plurality of void strips that intersect vertically and horizontally on the surface of the contact; the N sets of non - series - connected contact groups are respectively connected in parallel.

6. The relay according to claim 4 or 5, characterized in that: The contact surface of the contact of the grid - type contact structure is a plane or a curved surface.

7. The relay according to claim 1, characterized in that: It further includes a second housing sleeved outside the relay, and the second housing has an opening; the relay is inserted into the second housing through the opening of the second housing, and the lead - out pins of the relay extend out of the opening; a sealing structure is provided between the opening of the second housing and the relay, and a corresponding sealing structure is formed between the relay and the second housing through a sealing glue, so that an airtight cavity is formed between the first housing and the second housing of the relay.

8. The relay according to claim 1 or 7, characterized in that: The N sets of non - series - connected contact groups are sealed in the first housing through a sealing glue; the contact pairs in each set of contact groups are connected in series.

9. The relay according to claim 7, wherein: The sealing structure is a whole - layer sealing glue layer covering the opening of the second housing.

10. The relay according to claim 7, wherein: The second housing is further provided with a positioning structure for the first housing of the relay, so that an airtight cavity is formed between the bottom surface and / or the four side walls of the first housing and the second housing of the relay.

11. The relay according to claim 10, wherein: At the four corners of the bottom surface of the second housing, there are also provided bosses as positioning structures, and the relay inserted into the second housing is placed on the bosses, so that an airtight cavity is formed between the bottom surface of the first housing and the second housing of the relay; and / or; on the four side surfaces of the second housing, there are also provided ribs as positioning structures, and the side surface of the relay inserted into the second housing abuts against the ribs, so that an airtight cavity is formed between the side surface of the first housing and the second housing of the relay.

12. The relay according to claim 10, characterized in that: In the second housing, there is also provided a closable ventilation hole.

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