A low-impedance, high-reliability relay

Abstract

The present invention relates to the field of relay technology, and in particular discloses a low-impedance and high-reliability relay, comprising an electromagnet unit and a contact unit, wherein the electromagnet unit drives the contact unit to be turned on or off by means of electromagnetic force; a shielding member is coated on the outside of the electromagnet unit, and a protective member covers and protects the electromagnet unit, the contact unit and the shielding member; the shielding member comprises a cover member and a plate member, the cover member is U-shaped, and has two plate protrusions at both ends of the cover member, and has two card slots at both ends of the plate member for respectively accommodating the two plate protrusions; the protective member comprises a shell member and a shell plate member, the cover member and the plate member are respectively arranged on the shell member and the shell plate member, and the shell plate member is used to encapsulate and cover the electromagnet unit, the contact unit, the cover member and the plate member in the shell member; with the help of the structural design of the shielding member, all-round shielding of the electromagnet unit is achieved, thereby preventing the external magnetic field from interfering with the normal use of the electromagnet unit and ensuring the high reliability and stability of the relay.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular discloses a relay with low impedance and high reliability. Background Art

[0002] Relay is one of the automatic switches commonly used in various products and equipment. There are many types of relays. For example, electromagnetic relay is one of the commonly used relay types. Electromagnetic relay mainly includes a relay body and other components that cooperate with the relay body. The relay body mainly relies on electromagnetic force to realize the conduction or disconnection of the relay. The structural design of the relay body in the existing technology is unreasonable. Although the relay body is provided with a U-shaped shielding shell in the existing technology, the external electromagnetic field can still act on the relay body through the opening of the U-shaped shielding shell, causing the relay body to be affected by external electromagnetic interference and poor use, which cannot meet the actual needs of the industry. Summary of the Invention

[0003] In order to overcome the shortcomings and deficiencies in the prior art, the purpose of the present invention is to provide a low-impedance and high-reliability relay. With the help of the structural design of the shielding part, all-round shielding of the electromagnet unit is achieved, thereby preventing external magnetic fields from interfering with the normal use of the electromagnet unit and ensuring high reliability and stability in the use of the relay.

[0004] To achieve the above-mentioned purpose, the present invention provides a low-impedance and high-reliability relay, comprising an electromagnet unit and a contact unit, wherein the electromagnet unit drives the contact unit to be turned on or off by means of electromagnetic force; further comprising a shielding member and a protective member, wherein the shielding member is wrapped around the outside of the electromagnet unit, and the protective member covers and protects the electromagnet unit, the contact unit and the shielding member; the shielding member comprises a cover member and a plate member cooperating with the cover member, the cover member is U-shaped, and has two plate protrusions at both ends of the cover member, and has two card grooves at both ends of the plate member for respectively accommodating the two plate protrusions, and the electromagnet unit is clamped between the plate member and the cover member; the protective member comprises a shell member and a shell plate member detachably connected to the shell member, the cover member and the plate member are respectively arranged on the shell member and the shell plate member, the shell member is used to accommodate the electromagnet unit, the contact unit, the cover member and the plate member, and the shell plate member is used to encapsulate and cover the electromagnet unit, the contact unit, the cover member and the plate member in the shell member.

[0005] Among them, the cover body includes a base plate and two side plates bent from both ends of the base plate. The two side plates are located on the same side of the base plate and are arranged in parallel. The two plate protrusions are respectively arranged at the free ends of the two side plates. The width of the side plate is greater than the width of the plate protrusion. The plate body is used to block the free ends of the side plates.

[0006] The shell has a blind groove and two through grooves in the blind groove. The through grooves pass through the bottom wall of the blind groove. The base plate is located in the blind groove and is pressed against the bottom wall of the blind groove. The two through grooves are used to accommodate two side panels respectively.

[0007] It also includes an armature unit located in the shielding part, the armature unit includes a first insulating part rotatably set on the bottom wall of the blind slot, a permanent magnet set on the first insulating part and two armature parts, the two armature parts are set in parallel, the N pole and S pole of the permanent magnet respectively attract the two armature parts, and the electromagnetic force of the electromagnet unit drives the armature unit to rotate so that the contact unit is turned on or off.

[0008] Among them, it also includes an insulating push piece and a second insulating part. The electromagnet unit includes an insulating frame, an iron core arranged in the insulating frame, a coil spirally wound on the outside of the insulating frame and surrounding the iron core, and two yokes respectively arranged at both ends of the iron core. The yoke has a matching part, and the matching parts of the two yokes respectively extend into between the two armature parts at both ends of the armature unit. The two ends of the first insulating part away from each other are provided with shafts, and the shafts at both ends of the first insulating part are respectively rotatably arranged on the second insulating part and the shell part; the second insulating part has a first clamping protrusion, a second clamping protrusion and a third clamping protrusion arranged in the same plane, the first clamping protrusion and the second clamping protrusion are arranged in parallel, the first clamping protrusion and the second clamping protrusion are used to clamp the matching part of one yoke, and the matching part of the other yoke is pressed on the third clamping protrusion; the first insulating part is provided with a protrusion protruding out of the shielding part, the protrusion acts on one end of the insulating push piece, and the other end of the insulating push piece acts on the contact unit, the third clamping protrusion and the protrusion are respectively located on both sides of the matching part of the other yoke.

[0009] It also includes two power conductor pins arranged on the insulating frame and protruding from the shell plate, and the two ends of the coil are respectively connected to the two power conductor pins; the shell plate has a positioning protrusion inserted into the external circuit main board, and the two power conductor pins pass through the positioning protrusion and are used to be welded on the circuit main board.

[0010] Among them, the side plate is provided with a first positioning hole, and the shell part has a first positioning column extending into the first positioning hole; the plate body is provided with a second positioning column, and the shell plate part has a second positioning hole for accommodating the second positioning column; the shell plate part has a plurality of elastic buckles, and the shell part is provided with a plurality of protrusions, and the plurality of elastic buckles respectively buckle the plurality of protrusions, and the plurality of protrusions are arranged around the central axis of the shell part.

[0011] The contact unit includes a dynamic spring and a static spring arranged in the shell part, the shell part has a partition, the partition is located between the contact unit and the shielding part, the partition has a positioning blind groove for accommodating the shielding part, the inner groove surface of the positioning blind groove blocks the side of the contact plate part away from the cover part; the static spring has two static contacts, the dynamic spring includes a fixed conductive sheet arranged on the shell part, and an elastic spring sheet arranged on the fixed conductive sheet; the elastic spring sheet includes a first spring sheet and a reinforcing spring sheet, one end of the reinforcing spring sheet is attached to one end of the first spring sheet and fixedly arranged on the fixed conductive sheet, and the other end of the reinforcing spring sheet is fixed to the fixed conductive sheet. One end is provided with two flat plate bodies and a bent body located between the two flat plate bodies, and the two moving contacts are respectively arranged at the other end of the first spring and the two flat plate bodies. The bent body has an inclined plate located between the two flat plate bodies and two bent plates arranged at the free end of the inclined plate. The angle between the inclined plate and the flat plate body is an acute angle, and the angle between the bent plate and the inclined plate is an obtuse angle. The bent plate is located between the inclined plate and the other end of the first spring; when the moving contact contacts the conductive static contact, the free end of the bent plate abuts against and presses the other end of the first spring so that the moving contact is pressed on the static contact.

[0012] Among them, the reinforcing spring has a main plate body, a flat plate body and an inclined plate are respectively arranged on the main plate body, the flat plate body and the main plate body are arranged coplanarly, and the inclined plate extends from the main plate body in a direction away from the first spring plate and away from the main plate body; the two bent plates are respectively arranged on the left and right sides of one end of the inclined plate away from the main plate body, and the inclined plate is located between the two bent plates.

[0013] Among them, it also includes a second spring, which is clamped between the first spring and the reinforcing spring. One end of the first spring, one end of the second spring, and one end of the reinforcing spring are all arranged on the fixed conductive sheet, and the moving contact is arranged at the other end of the first spring, the other end of the second spring and the flat sheet body; the middle part of the first spring, the middle part of the second spring, and the middle part of the reinforcing spring are all provided with a semicircular arch arcing piece, the semicircular arch arcing piece of the first spring, the semicircular arch arcing piece of the second spring, and the semicircular arch arcing piece of the reinforcing spring are arranged in parallel, and the semicircular arch arcing piece of the second spring is located between the semicircular arch arcing piece of the first spring and the semicircular arch arcing piece of the reinforcing spring.

[0014] The beneficial effects of the present invention are as follows: during the use of the relay, the shielding part is used to cover the shielded electromagnet unit, and the protective part is used to limit the assembly of the shielding part to prevent the shielding part from spreading out. With the help of the structural design of the shielding part, the electromagnet unit is shielded in all directions, and the external magnetic field is prevented from interfering with the normal use of the electromagnet unit, thereby ensuring the high reliability and stability of the relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0016] Figure 2 It is a schematic diagram of the decomposition structure of the present invention;

[0017] Figure 3 A schematic diagram of the decomposed structure of the present invention from another perspective;

[0018] Figure 4 This is a schematic diagram of the structure of the present invention after the shielding member and the protective member are hidden;

[0019] Figure 5 This is a schematic diagram of the exploded structure of the present invention after the shielding member and the protective member are hidden;

[0020] Figure 6 Schematic diagram of the three-dimensional structure of the dynamic spring of the present invention;

[0021] Figure 7 Schematic diagram of the exploded structure of the dynamic spring of the present invention;

[0022] Figure 8 It is a schematic diagram of the three-dimensional structure of the reinforcing spring of the present invention.

[0023] Reference numerals include:

[0024] 1—electromagnet unit 2—contact unit 3—cover

[0025] 4—plate body 5—plate protrusion 6—slot

[0026] 7—shell part 8—shell plate part 9—base plate

[0027] 11—side plate 12—blind groove 13—through groove

[0028] 14 - first positioning hole 15 - second positioning column 16 - elastic buckle

[0029] 17—protrusion 18—first insulating member 19—permanent magnet

[0030] 21 - Armature 22 - Insulation push piece 23 - Second insulation piece

[0031] 24 - shaft 25 - first locking protrusion 26 - second locking protrusion

[0032] 27 - third latch 28 - protrusion 29 - power supply pin

[0033] 31 - Positioning protrusion 32 - Dynamic spring 33 - Static spring

[0034] 34 - partition 35 - static contact 36 - fixed conductive sheet

[0035] 37 - first reed 38 - reinforcement reed 39 - flat plate

[0036] 41 - moving contact 42 - inclined piece 43 - bent piece

[0037] 44 - main plate 45 - second spring 46 - semicircular arch arc plate

[0038] 47 - perforated slot 48 - undercut piece 49 - first flat plate

[0039] 51 - second flat plate 52 - inclined plate 53 - guide hole DETAILED DESCRIPTION

[0040] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention.

[0041] See also Figures 1 to 8 As shown, a low-impedance, high-reliability relay of the present invention includes an electromagnet unit 1 and a contact unit 2. The electromagnet unit 1 drives the contact unit 2 to conduct or disconnect via electromagnetic force. The relay also includes a shielding member and a protective member. The shielding member covers the outside of the electromagnet unit 1 and is made of a magnetically conductive material, such as a metal containing iron, cobalt, or nickel, and is formed by cutting and bending. The protective member covers and protects the electromagnet unit 1, the contact unit 2, and the shielding member and is made of insulating plastic and is injection molded using an injection mold.

[0042] The shielding member includes a cover member 3 and a plate member 4 that cooperates with the cover member 3. The cover member 3 is roughly U-shaped, and has two plate protrusions 5 at both ends of the cover member 3, that is, each end of the cover member 3 has a plate protrusion 5, and the plate protrusion 5 is located at the free end of the end of the cover member 3. The two ends of the plate member 4 have two card grooves 6 for respectively accommodating the two plate protrusions 5, and the electromagnet unit 1 is clamped between the plate member 4 and the cover member 3.

[0043] The protective part includes a shell part 7 and a shell plate part 8 detachably connected to the shell part 7. The cover part 3 and the plate part 4 are respectively arranged on the shell part 7 and the shell plate part 8. The shell part 7 is used to accommodate the electromagnet unit 1, the contact unit 2, the cover part 3 and the plate part 4. The shell plate part 8 is used to encapsulate and cover the electromagnet unit 1, the contact unit 2, the cover part 3 and the plate part 4 in the shell part 7.

[0044] During the use of the relay, the shielding member is used to cover the shielded electromagnet unit 1, and the shielding member is used to limit and assemble the shielding member together to prevent the shielding member from spreading out. With the help of the structural design of the shielding member, the electromagnet unit 1 is shielded in all directions to prevent the external magnetic field from interfering with the normal use of the electromagnet unit 1, thereby ensuring the high reliability and stability of the relay.

[0045] The cover body 3 includes a base plate 9 and two side plates 11 bent from both ends of the base plate 9. The two side plates 11 are located on the same side of the base plate 9. The two side plates 11 are spaced apart and arranged in parallel with each other. The two plate protrusions 5 are respectively arranged on the free ends of the two side plates 11. The width of the side plate 11 is greater than the width of the plate protrusion 5. The plate body 4 is used to block the free ends of the side plates 11.

[0046] During the installation of the cover member 3 and the plate member 4, the inner groove surface of the locking groove 6 blocks the limit plate protrusion 5, ensuring that the cover member 3 and the plate member 4 are accurately installed together and preventing the cover member 3 from moving relative to the plate member 4. During the installation of the cover member 3 and the housing member 7, the plate member 4 blocks the free end of the side plate 11 to ensure that the two are assembled quickly and accurately, and to avoid assembly errors of the cover member 3 and the housing member 7.

[0047] The shell member 7 has a blind groove 12 and two through grooves 13 located in the blind groove 12. The blind groove 12 is recessed from the outer surface of the shell member 7. The through groove 13 is arranged on the bottom wall of the blind groove 12. The through groove 13 passes through the bottom wall of the blind groove 12. The base plate 9 is located in the blind groove 12 and is pressed against the bottom wall of the blind groove 12. The two through grooves 13 are used to respectively accommodate the two side panels 11.

[0048] During the installation of the housing 7 and the cover 3, the inner side surface of the blind groove 12 blocks and limits the cover 3, and the bottom wall of the blind groove 12 blocks and abuts the cover 3, ensuring that the cover 3 and the housing 7 are quickly and accurately installed together. The two through grooves 13 limit the two side panels 11, ensuring that the two side panels 11 are quickly and accurately assembled.

[0049] The side panel 11 is provided with a first positioning hole 14, and the shell part 7 has a first positioning column extending into the first positioning hole 14; the first positioning column is limited by the inner hole surface of the first positioning hole 14 to ensure that the cover part 3 and the shell part 7 are accurately installed together, while simplifying the installation and assembly between the cover part 3 and the shell part 7, thereby improving the assembly efficiency of the two.

[0050] The plate body 4 is provided with a second positioning column 15, and the shell plate 8 has a second positioning hole for accommodating the second positioning column 15; the second positioning column 15 is limited by the inner hole surface of the second positioning hole, so that the plate body 4 and the shell plate 8 can be installed together quickly and accurately, thereby improving the installation and alignment efficiency of the two.

[0051] The shell plate 8 has multiple elastic clips 16, and the housing 7 has multiple protrusions 17. The multiple elastic clips 16 respectively engage the multiple protrusions 17, which are arranged around the central axis of the housing 7. The multiple elastic clips 16 and the multiple protrusions 17 ensure that the shell plate 8 and the housing 7 are firmly installed together. At the same time, the elastic deformation of the elastic clips 16 allows for the removal of the two, improving the efficiency of assembly and disassembly.

[0052] The relay also includes an armature unit located in the shielding member. The armature unit includes a first insulating member 18 rotatably arranged on the bottom wall of the blind slot 12, a permanent magnet 19 arranged on the first insulating member 18, and two armature members 21. The armature member 21 is roughly a rectangular flat plate. The two armature members 21 are spaced apart and arranged parallel to each other. The permanent magnet 19 is clamped between the two armature members 21. The N pole and S pole of the permanent magnet 19 respectively attract the two armature members 21, so that the two armature members 21 have different polarities. The electromagnetic force of the electromagnet unit 1 drives the armature unit to rotate to make the contact unit 2 conductive or disconnected.

[0053] When the electromagnet unit 1 is energized, the electromagnet unit 1 generates magnetism, and the magnetic force of the electromagnet unit 1 acts on the two armature parts 21 of the armature unit. With the help of the magnetic effect of the permanent magnet 19 on the two armature parts 21, the armature unit rotates relative to the housing part 7. The rotating armature unit can drive the contact 41 assembly to be turned on or off.

[0054] It also includes an insulating push piece 22 and a second insulating part 23. The electromagnet unit 1 includes an insulating frame, an iron core arranged in the insulating frame, a coil spirally wound on the outside of the insulating frame and surrounding the iron core, and two yokes respectively arranged at the left and right ends of the iron core. The yoke has a matching part, which is flat. The matching parts of the two yokes respectively extend between the two armature parts 21 at both ends of the armature unit.

[0055] Both ends of the first insulating member 18 that are away from each other are provided with a shaft 24. The shafts 24 at both ends of the first insulating member 18 are rotatably set on the second insulating member 23 and the shell member 7 respectively. With the help of the plastic material properties of the shell member 7 and the second insulating member 23, it is convenient to quickly and efficiently injection mold the shaft hole on the second insulating member 23 and the shell member 7, and make the shaft 24 rotatably accommodated in the shaft hole, thereby improving the rotational installation efficiency of the first insulating member 18.

[0056] The second insulating member 23 has a first latching protrusion 25, a second latching protrusion 26 and a third latching protrusion 27 arranged on the same plane. The first latching protrusion 25 and the second latching protrusion 26 are arranged in parallel. The first latching protrusion 25 and the second latching protrusion 26 are used to clamp the matching part of one yoke, and the matching part of the other yoke is pressed on the third latching protrusion 27.

[0057] With the help of the structural design in which the second latching protrusion 26 and the third latching protrusion 27 are arranged in the same plane, the matching parts of the two yokes are arranged in the same plane. In actual use, the matching parts of the two yokes are respectively extended into between the two armature parts 21 at the left and right ends of the armature unit, so as to avoid the matching parts of the two yokes being relatively misaligned, resulting in inaccurate contact between the yoke and the armature unit, and ensure that the two armature parts 21 of the armature unit can accurately contact the matching parts of the two yokes, so that the magnetic flux lines can circulate in the order of the iron core, a yoke, an armature part 21, the permanent magnet 19, the other armature part 21, and the other yoke, thereby ensuring the circulation loop of the magnetic flux lines and thereby ensuring the magnetic holding stability of the relay.

[0058] The first insulating member 18 is provided with a protrusion 28 extending beyond the shield. This protrusion 28 acts on one end of the insulating push piece 22, the other end of which acts on the contact unit 2. A third latching protrusion 27 and protrusion 28 are located on either side of the mating portion of the other yoke. By virtue of the provision of protrusion 28, the insulating push piece 22 is driven by protrusion 28 to connect or disconnect the contact unit, preventing the iron core, yoke, coil, permanent magnet 19, and armature 21 from being exposed outside the shield and being interfered with by external magnetic fields, while ensuring that the shield provides all-round electromagnetic shielding for the electromagnet unit 1 and the armature unit.

[0059] It also includes two power pins 29 installed on the insulating frame and protruding from the shell plate 8, and the two ends of the coil are respectively connected to the two power pins 29; the shell plate 8 has a positioning pin 31 inserted into the external circuit main board, and the two power pins 29 pass through the positioning pin 31 and are used to be welded to the circuit main board.

[0060] With the help of the structural design of the positioning protrusion 31, the entire relay and the circuit main board can be installed quickly and accurately. The positioning protrusion 31 limits the power pin 29, so that the two can be assembled with the circuit main board at one time. On the other hand, the positioning protrusion 31 protects the power pin 29, reducing the risk of poor assembly of the power pin 29 due to being touched and bent.

[0061] The contact unit 2 includes a dynamic spring 32 and a static spring 33 mounted within the housing 7. The housing 7 includes a partition 34 positioned between the contact unit 2 and the shielding member, separating the contact unit 2 from the shielding member. The partition 34 includes a blind positioning slot 12 for accommodating the shielding member. The inner surface of the blind positioning slot 12 blocks the side of the plate member 4 away from the cover member 3. The blind positioning slot 12 helps secure the cover member 3 and the plate member 4 together, preventing them from becoming detached from each other and reducing the shielding effect.

[0062] The static spring 33 has two static contacts 35, and the dynamic spring 32 includes a fixed conductive sheet 36 provided on the housing 7 and an elastic spring provided on the fixed conductive sheet 36; the elastic spring includes a first spring 37 and a reinforcing spring 38, one end of the reinforcing spring 38 is attached to one end of the first spring 37 and fixedly provided on the fixed conductive sheet 36, and the other end of the reinforcing spring 38 is provided with two flat sheet bodies 39 and a bent body located between the two flat sheet bodies 39, and two dynamic contacts 41 are respectively provided on the other end of the first spring 37 and the two On a flat plate body 39, the bent body has an inclined plate 42 located between the two flat plates 39 and two bent plates 43 arranged on the free ends of the inclined plates 42. The angle between the inclined plate 42 and the flat plate body 39 is an acute angle, and the angle between the bent plate 43 and the inclined plate 42 is an obtuse angle. The bent plate 43 is located between the inclined plate 42 and the other end of the first spring plate 37; when the moving contact 41 contacts the conductive static contact 35, the free end of the bent plate 43 presses against the other end of the first spring plate 37 so that the moving contact 41 is pressed on the static contact 35.

[0063] When the electromagnet unit 1 drives the movable spring 32 to move so that the movable contact 41 contacts and conducts the static contact 35, the insulating push piece 22 drives the first spring piece 37 and the reinforcing spring piece 38 and causes the bent body to elastically deform, so that the free end of the bent piece 43 of the bent body contacts and presses the other end of the first spring piece 37. With the help of the elastic restoring force of the bent body, the movable contact 41 and the static contact 35 are stably contacted and conducted together, preventing the movable contact 41 and the static contact 35 from being separated from each other due to external vibration or accidental contact, thereby ensuring the stability of the relay's performance.

[0064] The reinforcing spring 38 has a main plate body 44, a flat plate body 39 and an inclined plate 42 respectively arranged on the same end of the main plate body 44, the flat plate body 39 and the main plate body 44 are arranged coplanarly, and the inclined plate 42 extends from the main plate body 44 in a direction away from the first spring 37 and away from the main plate body 44; in actual use, the reinforcing spring 38 is made of the same material sheet processed and bent, which on the one hand ensures the consistency of the structure of the reinforcing spring 38, and on the other hand improves the manufacturing efficiency of the reinforcing spring 38.

[0065] The two bent pieces 43 are respectively disposed on the left and right sides of the end of the inclined piece 42 away from the main piece 44, with the inclined piece 42 located between the two bent pieces 43. In actual use, the bent pieces 43 are directly bent from the free ends of the inclined piece 42, which improves the manufacturing efficiency of the bent pieces 43 and ensures that the two bent pieces 43 do not interfere with each other.

[0066] The second spring 45 is clamped between the first spring 37 and the reinforcing spring 38. One end of the first spring 37, one end of the second spring 45, and one end of the reinforcing spring 38 are all mounted and fixed to the fixed conductive plate 36. The movable contact 41 is disposed on the other end of the first spring 37, the other end of the second spring 45, and the flat plate body 39. The addition of the second spring 45 not only increases the strength of the dual-contact spring structure, but also prevents deformation due to low strength, ensuring the stability of the dual-contact spring structure. Furthermore, the second spring 45 ensures that the dual-contact spring structure can quickly and fully reset, improving the separation efficiency of the movable contact 41 and the static contact 35.

[0067] A semicircular arched arc piece 46 is provided in the middle of the first reed 37, the middle of the second reed 45 and the middle of the reinforcing reed 38. The semicircular arched arc piece 46 of the first reed 37, the semicircular arched arc piece 46 of the second reed 45 and the semicircular arched arc piece 46 of the reinforcing reed 38 are arranged in parallel, and the semicircular arched arc piece 46 of the second reed 45 is located between the semicircular arched arc piece 46 of the first reed 37 and the semicircular arched arc piece 46 of the reinforcing reed 38.

[0068] Through the structural setting of the semicircular arch arc-starting piece 46, the length of the spring is increased in a directionally variable manner, thereby improving the elastic performance of the double-contact spring structure. While ensuring the strength of the double-contact spring structure itself, the elastic deformation capacity of the double-contact spring structure is improved. When the moving contact 41 and the static contact 35 are in contact and conductive, the moving contact 41 can roll relative to the static contact 35 with the help of the elastic deformation of the double-contact spring structure, ensuring that the two are in stable contact and conductive.

[0069] A perforated slot 47 is provided in the middle of the first spring piece 37, the middle of the second spring piece 45, and the middle of the reinforcing spring piece 38. The perforated slot 47 passes through the semicircular arch arc-starting piece 46 along the length direction of the semicircular arch arc-starting piece 46. The two moving contacts 41 are respectively located on both sides of the perforated slot 47 of the first spring piece 37, and the two moving contacts 41 are respectively located on both sides of the perforated slot 47 of the second spring piece 45.

[0070] The provision of the perforated slot 47 helps to reduce the strength of the double-contact spring structure itself, ensuring that the double-contact spring structure can fully deform elastically; on the other hand, the perforated slot 47 helps to separate the current transmission between the two moving contacts 41 and the two static contacts 35, ensuring the stability of the signal transmission of the two moving contacts 41.

[0071] Along the length of the reinforcing spring 38, the perforated slot 47 and the flat plate 39 of the reinforcing spring 38 are spaced apart from each other, and the perforated slot 47 and the bent body of the reinforcing spring 38 are spaced apart from each other. Compared to extending the perforated slot 47 to the bent body, this avoids a reduction in the strength of the bent body, ensuring that the bent body can fully and stably contact the other end of the spring, avoiding insufficient elastic force exerted on the spring due to reduced strength of the bent body, and ensuring that the bent body can fully and stably contact the spring, thereby maintaining stable contact between the moving contact 41 and the static contact 35.

[0072] The first spring 37 further includes an undercut 48, which is bent from the first spring 37. The undercut 48 and the reinforcing spring 38 are located on either side of the first spring 37. The undercut 48 is used to prevent the insulating push piece 22 from falling off the first spring 37. When the insulating push piece 22 is assembled and mated with the dual-contact spring structure, the undercut 48 abuts against the insulating push piece 22, preventing it from falling off the dual-contact spring structure and ensuring a stable assembly of the insulating push piece 22 and the dual-contact spring structure.

[0073] The fixed conductive plate 36 includes a first plate 49, a second plate 51, and an inclined plate 52 connecting the first plate 49 and the second plate 51. The first plate 49 and the second plate 51 are arranged parallel to each other. The first plate 49 is located between the reinforcing spring 38 and the second plate 51. One end of the first spring 37, one end of the second spring 45, and one end of the reinforcing spring 38 are all riveted to the first plate 49 via rivet studs.

[0074] The second plate 51 is provided with a guide hole 53 extending therethrough, and the insulating push piece 22 is movably accommodated within the guide hole 53. The guide hole 53 ensures that the insulating push piece 22 moves in the correct direction, and the inner surface of the guide hole 53 blocks and limits the insulating push piece 22, preventing it from moving and causing improper use.

[0075] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there may be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A relay comprising an electromagnet unit and a contact unit, wherein the electromagnet unit drives the contact unit to be turned on or off by electromagnetic force; characterized in that: It also includes a shielding member and a protective member, the shielding member is coated on the outside of the electromagnet unit, and the protective member covers and protects the electromagnet unit, the contact unit and the shielding member; the shielding member includes a cover member and a plate member matched with the cover member, the cover member is U-shaped, and has two plate protrusions at both ends of the cover member, and has two card slots at both ends of the plate member for respectively accommodating the two plate protrusions, and the electromagnet unit is clamped between the plate member and the cover member; the protective member includes a shell member and a shell plate member detachably connected to the shell member, the cover member and the plate member are respectively arranged on the shell member and the shell plate member, the shell member is used to accommodate the electromagnet unit, the contact unit, the cover member and the plate member, and the shell plate member is used to encapsulate and cover the electromagnet unit, the contact unit, the cover member and the plate member in the shell member; The cover body includes a base plate and two side plates bent from both ends of the base plate. The two side plates are located on the same side of the base plate and are arranged in parallel. Two plate protrusions are respectively provided at the free ends of the two side plates. The width of the side plates is greater than the width of the plate protrusions. The plate body is used to block the free ends of the side plates. The shell has a blind groove and two through grooves located in the blind groove. The through grooves penetrate the bottom wall of the blind groove. The base plate is located in the blind groove and is pressed against the bottom wall of the blind groove. The two through grooves are used to respectively accommodate two side plates. The shield also includes an armature unit located in the shield, the armature unit including a first insulating member rotatably disposed on the bottom wall of the blind slot, a permanent magnet disposed on the first insulating member, and two armature members, the two armature members being disposed in parallel, the north pole and the south pole of the permanent magnet respectively attracting the two armature members, and the electromagnetic force of the electromagnet unit driving the armature unit to rotate so as to connect or disconnect the contact unit; The cam is provided with a plurality of cams, each of which is connected to the second insulating member by a plurality of cams, and the plurality of cams are connected to the second insulating member by a plurality of cams.

2. The relay according to claim 1, wherein: It also includes two power conductor pins arranged on the insulating frame and protruding from the shell plate, and the two ends of the coil are respectively connected to the two power conductor pins; the shell plate has a positioning protrusion inserted into the external circuit main board, and the two power conductor pins pass through the positioning protrusion and are used to be welded on the circuit main board.

3. The relay according to claim 1, wherein: The side panel is provided with a first positioning hole, and the shell member has a first positioning column extending into the first positioning hole; the plate member is provided with a second positioning column, and the shell member has a second positioning hole for accommodating the second positioning column; the shell member has a plurality of elastic buckles, and the shell member is provided with a plurality of protrusions, and the plurality of elastic buckles respectively buckle the plurality of protrusions, and the plurality of protrusions are arranged around the central axis of the shell member.

4. The relay according to claim 1, wherein: The contact unit includes a dynamic spring and a static spring arranged in the shell part, the shell part has a partition, the partition is located between the contact unit and the shielding part, the partition has a positioning blind groove for accommodating the shielding part, the inner groove surface of the positioning blind groove blocks the side of the contact plate part away from the cover part; the static spring has two static contacts, the dynamic spring includes a fixed conductive sheet arranged on the shell part, and an elastic spring sheet arranged on the fixed conductive sheet; the elastic spring sheet includes a first spring sheet and a reinforcing spring sheet, one end of the reinforcing spring sheet is attached to one end of the first spring sheet and fixedly arranged on the fixed conductive sheet, and the other end of the reinforcing spring sheet is attached to the fixed conductive sheet. The end is provided with two flat plate bodies and a bent body located between the two flat plate bodies, the two moving contacts are respectively arranged at the other end of the first spring and the two flat plate bodies, the bent body has an inclined plate located between the two flat plate bodies and two bent plates arranged at the free end of the inclined plate, the angle between the inclined plate and the flat plate body is an acute angle, the angle between the bent plate and the inclined plate is an obtuse angle, and the bent plate is located between the inclined plate and the other end of the first spring; when the moving contact contacts the conductive static contact, the free end of the bent plate presses against the other end of the first spring so that the moving contact is pressed on the static contact.

5. The relay according to claim 4, characterized in that: The reinforcing spring has a main plate body, a flat plate body and an inclined plate respectively arranged on the main plate body, the flat plate body and the main plate body are arranged coplanarly, and the inclined plate extends from the main plate body in a direction away from the first spring plate and away from the main plate body; the two bent plates are respectively arranged on the left and right sides of one end of the inclined plate away from the main plate body, and the inclined plate is located between the two bent plates.

6. The relay according to claim 4, characterized in that: It also includes a second spring, which is clamped between the first spring and the reinforcing spring. One end of the first spring, one end of the second spring, and one end of the reinforcing spring are all arranged on the fixed conductive sheet, and the moving contact is arranged on the other end of the first spring, the other end of the second spring, and the flat sheet body; the middle part of the first spring, the middle part of the second spring, and the middle part of the reinforcing spring are all provided with a semicircular arch arcing piece, the semicircular arch arcing piece of the first spring, the semicircular arch arcing piece of the second spring, and the semicircular arch arcing piece of the reinforcing spring are arranged in parallel, and the semicircular arch arcing piece of the second spring is located between the semicircular arch arcing piece of the first spring and the semicircular arch arcing piece of the reinforcing spring.

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