Relay

Abstract

The invention 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. Certain heat can be generated after the contact group provided with a plurality of mutually spaced lug bosses is conducted, so that the temperature of the interior of the relay is increased, and then ice layers on other contacts are melted, contacted and conducted, so that the contact reliability of the contacts is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and 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. Summary of the invention

[0006] The object of the present invention is to overcome the deficiencies of the prior art and to provide a relay which generates a certain amount of heat after being turned on by a contact group having a plurality of mutually spaced protrusions, thereby raising the temperature inside the relay and causing the ice layer on other contacts to melt and become conductive, thereby improving the contact reliability of the contacts.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a relay, including a first housing and N groups of non-series contact groups accommodated in the first housing, wherein N≥2, each group of contact groups includes at least one pair of contact pairs, and each pair of contact pairs includes 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 multiple mutually spaced protrusions, and the moving contacts in all 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 a structure in which intersecting grid-like gaps are formed on the contact surface of the contact, or a structure in which a plurality of intersecting gap strips are formed on the surface of the contact; the N groups of non-series contact groups are respectively connected in parallel.

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

[0013] It also includes a second shell that is sleeved on the outside of the relay, and the second shell has an opening; the relay is installed in the second shell through the opening of the second shell, and the lead pins of the relay extend out of the opening; a sealing structure is provided between the opening of the second shell and the relay, and a corresponding sealing structure is formed between the relay and the second shell by a sealant, so that an airtight cavity is formed between the first shell and the second shell of the relay.

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

[0015] The sealing structure is a sealing adhesive layer that covers the entire opening of the second shell.

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

[0017] At the four corners of the bottom surface of the second shell, there are bosses serving as positioning structures, and the relay installed in the second shell rests on the bosses to form a corresponding airtight cavity between the first shell of the relay and the bottom surface of the second shell; and / or; on the four sides of the second shell, there are convex ribs serving as positioning structures, and the side surfaces of the relay installed in the second shell rest against the convex ribs to form a corresponding airtight cavity between the side surfaces of the first shell of the relay and the second shell.

[0018] A closable vent hole is also provided in the second shell.

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

[0020] 1. In the present invention, in N-1 groups of contact groups, the contact surfaces of the moving contacts and / or the stationary contacts in each contact pair in at least one group of contact groups are set as a plurality of mutually spaced protrusions, so that the contact group provided with a plurality of mutually spaced protrusions can achieve preliminary conduction by breaking the ice layer on the contacts by the protrusions, and after conduction, a certain amount of heat is generated, so that the temperature inside the relay rises and the ice layer on other contacts melts and the contacts are conducted, thereby improving the contact reliability of the contacts.

[0021] 2. The grid-type contact structure forms grid-like gaps on the contact surface of the contact, or the grid-type contact structure forms multiple gap strips that intersect vertically and horizontally on the surface of the contact. When N groups of contacts are connected in parallel, current diversion is achieved to reduce contact wear. In addition, this method will not consume a certain group of contacts when the contacts are electrically worn, and the contact groups can be consumed in rotation, which has a stronger resistance to electrical wear and thus ensures electrical durability.

[0022] 3. The present invention also includes a second shell that is sleeved on the outside of the relay. The relay is installed in the second shell through the mouth of the second shell. The second shell prevents the first shell of the relay from bulging outward and causing cracks between the first shell and the sealant, thereby reducing the problem of thickening of the ice layer at the contact position due to external environmental factors. A sealing structure is provided between the mouth of the second shell and the relay to further enhance the sealing.

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

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments; however, a relay of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

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

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

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

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

[0033] Fig. 9is a current schematic diagram of a relay according to a fifth embodiment of the present invention;

[0034] Fig.10 is a current schematic diagram of a relay according to a sixth embodiment of the present invention;

[0035] Fig.11 is a cross-sectional schematic diagram of a relay according to a seventh embodiment of the present invention;

[0036] Fig.12 yes Fig.11 A magnified schematic diagram of point A;

[0037] Fig.13 It is a schematic structural diagram of the second housing of the seventh embodiment of the present invention. DETAILED DESCRIPTION

[0038] Embodiment 1

[0039] See also Figure 1-Figure 4 As shown, a relay of the present invention comprises a first housing 21 and two groups of non-series contact groups contained in the first housing 21, each group of contact groups comprises a pair of contact pairs, each pair of contact pairs comprises corresponding moving contacts and static contacts; in the two groups of contact groups, the contact surface of the moving contact in the contact pair in one of the contact groups is set as a plurality of mutually spaced protrusions, and the moving contacts in all the contact groups are driven by the same action component and move toward the static contact at the same time, and the protrusions are used to break the ice layer on the contact surface when the contacts are in contact. The plurality of mutually spaced protrusions are arranged into a grid-type contact structure.

[0040] In this embodiment, the moving contacts in all contact groups are driven by the same action component and move toward the static contact at the same time. In other embodiments, it can be

[0041] In this embodiment, two groups of contact groups are connected in parallel, wherein the contact surface of the moving contact 11 of one group of contact groups is set to an arc surface, and the contact surface of the static contact 12 is set to a plane; one contact in the other group of contact groups is a grid-type contact structure 10, and the grid-type contact structure 10 is arranged on the moving contact 13, and the contact surface of the moving contact 13 is an arc surface; the contact surface of the static contact 14 in the other group of contact groups is set to a plane.

[0042] In the present embodiment, the grid-type contact structure 10 on the moving contact 13 forms a grid-like grid of intersecting gaps on the contact surface of the contact. Specifically, the grid-type contact structure 10 forms a plurality of vertically and horizontally intersecting gap bars on the surface of the contact, i.e., a plurality of vertical gap bars 101 and a plurality of horizontal gap bars 102, and the vertical gap bars 101 and the horizontal gap bars 102 intersect vertically; in other embodiments, the vertical gap bars 101 and the horizontal gap bars 102 intersect to form an angle less than 90 degrees.

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

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

[0045] A relay of the present invention has a plurality of mutually spaced protrusions in each contact pair in at least one of the N-1 contact groups, so that the contact group provided with the plurality of mutually spaced protrusions can achieve first conduction by breaking the ice layer on the contacts by the protrusions, and after conduction, a certain amount of heat is generated, so that the temperature inside the relay rises and the ice layer on other contacts melts to achieve contact conduction, thereby improving the contact reliability of the contacts.

[0046] A relay of the present invention, wherein the grid-type contact structure is a structure in which gaps intersecting each other in a grid shape are formed on the contact surface of the contact, or the grid-type contact structure is a structure in which a plurality of gap strips intersecting vertically and horizontally are formed on the surface of the contact, and when N groups of contacts are connected in parallel, current shunting is achieved to reduce contact wear; in addition, in this manner, when the contacts are electrically worn, a certain group of contacts will not be consumed in a fixed manner, and the contact groups can be consumed in rotation, so that the electrical wear resistance is stronger, thereby ensuring electrical durability.

[0047] Embodiment 2

[0048] See also Figure 5 As shown, a relay of the present invention is different from the first embodiment in that a grid-type contact structure 10 is provided on the static contact 14 .

[0049] Embodiment 3

[0050] See also Figure 6 As shown, a relay of the present invention is different from the first embodiment in that a grid-type contact structure 10 is provided on corresponding matching moving contacts 13 and stationary contacts 14.

[0051] Embodiment 4

[0052] See also Figure 7 As shown, a relay of the present invention is different from the first embodiment in that it includes four groups of parallel contact points, namely, a moving contact 11, a stationary contact 12, a moving contact 13, a stationary contact 14, a moving contact 15, a stationary contact 16, a moving contact 17, and a stationary contact 18; a grid-type contact structure 10 is arranged on one of the stationary contacts 18. The actuating component is a non-loaded reed 7.

[0053] Embodiment 5

[0054] See also Figure 8-Figure 9As shown, a relay of the present invention is different from the first embodiment in that it includes two groups of parallel contact groups, the two ends of the two groups of contact groups are led out through the same lead-out pin, and each group of contact groups 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 and the moving contact 17, the static contact 18 are connected in series, the moving contact 13, the static contact 14 and the moving contact 15, the static contact 16 are connected in series, and the moving contact 11, the static contact 12, the moving contact 17, the static contact 18 and the moving contact 13, the static contact 14, the moving contact 15, the static contact 16 are connected in parallel; the grid-type contact structure 10 is arranged on the static contact of each pair of contacts in one of the contact groups, that is, the static contact 12 and the static contact 18, and of course, it can also be on the moving contact of each pair of contacts, or it can be a combination. The action component is a non-loaded flow reed 8.

[0055] Embodiment 6

[0056] See also Fig.10 As shown, a relay of the present invention is different from 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.

[0057] Embodiment 7

[0058] See also Figure 11-13 As shown, a relay of the present invention is different from the above embodiment in that it further includes a second housing 3 sleeved on the outside of the relay 2, and the second housing 3 has an opening 31. The relay is installed in the second housing 3 through the opening 31 of the second housing 3, and the lead pins 22 of the relay 2 extend 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 a sealant. The sealing structure is a sealant layer 5 covering the entire opening 31 of the second housing 3. Since the present invention adopts the sealant layer covering the entire opening of the second housing as the sealing structure, the bonding strength between the first housing and the glue, and between the pin and the glue of the plastic sealed relay body can be strengthened, and water vapor in the air can be prevented from entering the interior of the relay.

[0060] In this embodiment, the second housing 3 is also provided with a positioning structure for the first housing 21 of the relay 2, so that the airtight cavity 4 is formed between the first housing 21 of the relay 2 and the bottom surface of the second housing 3 and between the four side walls. Specifically, at the four corners of the bottom surface of the second housing 3, bosses 32 as positioning structures are also provided, and the relay 2 installed in the second housing 3 rests on the bosses 32, so that a corresponding airtight cavity 4 is formed between the first housing 21 of the relay 2 and the bottom surface of the second housing 3. On the four sides of the second housing 3, convex ribs 33 as positioning structures are also provided, and the side surfaces of the relay 2 installed in the second housing 3 rest on the convex ribs 33, so that a corresponding airtight cavity 4 is formed between the first housing 21 of the relay 2 and the side surfaces of the second housing 3.

[0061] In this embodiment, a closable vent hole 34 is further provided in the second housing 3. The present invention adopts a closable vent hole in the second housing. With this structure of the present invention, when the gas pressure inside the plastic sealed relay body increases due to heat, the gas in the airtight cavity can be discharged through the vent hole, thereby ensuring the reliability of the sealing structure of the mouth.

[0062] A relay of the present invention further includes a second shell 3 which is sleeved on the outside of the relay 2. The relay 2 is installed in the second shell 3 through the mouth 31 of the second shell 3. The second shell 3 prevents the first shell 21 of the relay 2 from bulging outward and causing cracks between the first shell 21 and the sealant, thereby reducing the problem of thickening of the ice layer at the contact position due to external environmental factors. A sealing structure is provided between the mouth 31 of the second shell 3 and the relay 2 to further enhance the sealing performance.

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

[0064] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A relay comprising a first housing and N groups of non-series contact groups accommodated in the first housing, wherein: N≥2, each contact group includes at least one contact pair, and each contact pair includes corresponding moving contacts and static contacts; it is characterized in that: in the N-1 contact groups, the contact surface of the moving contact and / or the static contact in each contact pair in at least one contact group is set as a plurality of mutually spaced protrusions, and the moving contacts in all contact groups are driven by the actuating parts to move toward the static contacts, and the protrusions are used to break the ice layer on the contact surface to achieve conduction.

2. The relay according to claim 1, characterized in that: The action component is a moving reed that is driven by the magnetic circuit part of the relay.

3. The relay according to claim 1, characterized in that: 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.

4. The relay according to claim 1, characterized in that: The plurality of mutually spaced protrusions are arranged to form a grid-type contact structure.

5. The relay according to claim 4, characterized in that: The grid-type contact structure is a structure in which intersecting grid-like gaps are formed on the contact surface of the contact, or a structure in which a plurality of intersecting gap strips are formed on the surface of the contact; the N groups of non-series 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 point of the grid-type contact point structure is a plane or a curved surface.

7. The relay according to claim 1, characterized in that: It also includes a second shell that is sleeved on the outside of the relay, and the second shell has an opening; the relay is installed in the second shell through the opening of the second shell, and the lead pins of the relay extend out of the opening; a sealing structure is provided between the opening of the second shell and the relay, and a corresponding sealing structure is formed between the relay and the second shell by a sealant, so that an airtight cavity is formed between the first shell and the second shell of the relay.

8. The relay according to claim 1 or 7, characterized in that: The N groups of non-series contact groups are sealed in the first housing by sealant; the contact pairs in each contact group are connected in series.

9. The relay according to claim 8, characterized in that: The sealing structure is a sealing adhesive layer that covers the entire opening of the second shell.

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

11. The relay according to claim 10, characterized in that: At the four corners of the bottom surface of the second shell, there are bosses serving as positioning structures, and the relay installed in the second shell rests on the bosses to form a corresponding airtight cavity between the first shell of the relay and the bottom surface of the second shell; and / or; on the four sides of the second shell, there are convex ribs serving as positioning structures, and the side surfaces of the relay installed in the second shell rest against the convex ribs to form a corresponding airtight cavity between the side surfaces of the first shell of the relay and the second shell.

12. The relay according to claim 10, characterized in that: A closable vent hole is also provided in the second shell.

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