A magnetic latching relay with arc extinguishing magnetic steel

Abstract

The application discloses a magnetic latching relay with arc-extinguishing magnetic steel, which comprises a shell, a base and an arc-extinguishing magnetic steel assembly. The bottom of the shell is surrounded outside the base and is fixed with the base to form a cavity between the shell and the base for assembling main components of the magnetic latching relay. The inner side of the side wall of the shell is provided with a slot, the arc-extinguishing magnetic steel assembly is assembled in the slot of the shell and the position of the arc-extinguishing magnetic steel assembly is in the position corresponding to the cooperation of the moving contact and the static contact in the main components. The arc-extinguishing magnetic steel assembly is composed of laminated arc-extinguishing magnetic steel and laminated magnetic separation sheet. The arc-extinguishing magnetic steel assembly is fixed in the slot of the shell through interference fit. The application can improve the available space of the product and reduce the production cost of the product without sacrificing the function of arc-extinguishing by the magnetic steel.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, in particular to a magnetic latching relay with arc-extinguishing magnetic steel. Background Art

[0002] The magnetic latching relay, a new type of relay developed in recent years, also functions as an automatic switch. Like other electromagnetic relays, it automatically connects and disconnects circuits. However, the normally closed or normally open state of a magnetic latching relay relies entirely on the action of a permanent magnet, and its switching state is triggered by a pulsed electrical signal of a certain width. The contacts of a magnetic latching relay are normally held open or closed by the magnetic force generated by a permanent magnet. To open or close the relay contacts, the coil is energized with a positive (or negative) DC pulse voltage, and the relay switches between open and closed states instantly. When the contacts are in the latching state, the coil does not need to be energized; the magnetic force of the permanent magnet alone maintains the relay's state.

[0003] With the continuous expansion of relay applications, especially in the field of communication networks, driven by the miniaturization of equipment, relays with small size and large load have become a development trend. The trend of small size and large load also requires that the product can not only interrupt the arc in a limited space, but also ensure that there is enough space inside the product to set up other relay components. The magnetic latching relays of the prior art are usually equipped with two kinds of magnets, one is the magnetic latching magnet for magnetic holding, which is usually installed together with the armature to form the drive part, and the other is the arc extinguishing magnet for arc extinguishing. In order to ensure sufficient space inside the product, most magnetic latching relays in the prior art set the arc extinguishing magnet on the outside of the casing. At the same time, in order to position the arc extinguishing magnet and form effective protection, the arc extinguishing magnet is fixed by glue. This method sacrifices the external space of the product, increases the installation distance between multiple products, and is not conducive to the miniaturization of the equipment. Some magnetic latching relays also add parts similar to magnetic steel brackets inside the product to position the arc-extinguishing magnet. If the arc-extinguishing magnet and the magnetic latching magnet are magnetized after being assembled into the relay, there will be mutual influence. If the magnets are assembled after magnetization, it is necessary to distinguish the polarity of the magnets to ensure the effectiveness of arc extinguishing, which increases the difficulty of subsequent assembly. Moreover, this in-shell assembly method also increases the cost of parts and assembly costs due to the addition of parts positioning magnets. Summary of the Invention

[0004] The purpose of the present invention is to overcome the shortcomings of the existing technology and provide a magnetic latching relay with arc-extinguishing magnet. Through structural improvement, it can increase the available space of the product while reducing the production cost of the product without sacrificing the product's arc extinguishing function through the magnet.

[0005] The technical scheme adopted by the present application to solve its technical problems is: a magnetic latching relay with arc extinguishing magnetic steel, comprising a shell, a base and an arc extinguishing magnetic steel assembly; the bottom of the shell surrounds the base and is fixed with the base to form a cavity between the shell and the base for assembling main components of the magnetic latching relay; the inner side of the side wall of the shell is provided with a slot, and the arc extinguishing magnetic steel assembly is assembled in the slot of the shell and the position of the arc extinguishing magnetic steel assembly is in the position corresponding to the cooperation of the moving and static contacts in the main components; the arc extinguishing magnetic steel assembly is composed of laminated arc extinguishing magnetic steel and laminated magnetic shunt; the arc extinguishing magnetic steel assembly is fixed in the slot of the shell by interference fit.

[0006] The slot is provided at the side wall of the shell and is composed of the side wall at the corresponding position of the shell and the U-shaped surrounding wall in cross section.

[0007] The side wall of the shell is composed of the first side wall close to the outside and the second side wall close to the inside, and the bottom end of the second side wall is along the inner step of the side wall of the shell, which is lapped on the base; in the second side wall, a removal part is provided at the position corresponding to the slot to form a part of the slot.

[0008] In the base, a boss is also provided at the position corresponding to the position of the shell assembled with the arc extinguishing magnetic steel assembly, and the top surface of the boss abuts against the bottom end of the arc extinguishing magnetic steel assembly.

[0009] The slot depth of the slot is less than the height of the arc extinguishing magnetic steel assembly, so that the lower section of the arc extinguishing magnetic steel assembly is exposed towards the inside of the shell; the boss of the base is also provided with a retaining wall, and the top end of the retaining wall abuts against the bottom end of the surrounding wall to block the direction of the arc extinguishing magnetic steel assembly exposed to the inside of the shell.

[0010] The upper end of the retaining wall is also provided with a bevel on the side facing the arc extinguishing magnetic steel assembly.

[0011] The thickness of the bottom end of the surrounding wall is respectively provided with a circular arc shape on both sides.

[0012] In the laminated arc extinguishing magnetic steel and magnetic shunt, the arc extinguishing magnetic steel is provided on the inner side, and the magnetic shunt is provided on the outer side.

[0013] The thickness size of the arc extinguishing magnetic steel is greater than the thickness size of the magnetic shunt.

[0014] The width of the magnetic shunt is respectively provided with a folded edge on both sides, and the width of the magnetic shunt is respectively wrapped around the width of the arc extinguishing magnetic steel on both sides.

[0015] Compared with the prior art, the present application has the following beneficial effects:

[0016] 1. The present invention utilizes a slot provided on the inner side of the housing's sidewall, allowing the arc-extinguishing magnetic steel assembly to be assembled within the slot and positioned to align with the moving and static contacts in the main body. The arc-extinguishing magnetic steel assembly is comprised of a thin, laminated arc-extinguishing magnetic steel and a thin, laminated magnetic shielding sheet, and secured within the housing's slot by an interference fit. This structure, through its thinner magnetic steel design and the arc-extinguishing magnetic steel assembly embedded within the housing, as well as its laminated arc-extinguishing magnetic steel and magnetic shielding sheet, which are interference-fitted within the housing, increases available space and reduces production costs without sacrificing the product's arc extinguishing function. Furthermore, during assembly, the arc-extinguishing magnetic steel contained in the housing and the holding magnetic steel contained in the relay main body can be magnetized separately, effectively retaining the magnetic steel during magnetization. Furthermore, the housing's independent magnetization does not affect the magnetic steel in the magnetic circuit or other components within the product. The magnetization of the housing eliminates the need for additional polarity differentiation, further reducing assembly costs. The assembly process also eliminates unnecessary parts like magnetic brackets, further reducing component costs.

[0017] 2. The present invention employs a boss in the base, corresponding to the position on the housing where the arc-extinguishing magnetic steel assembly is mounted. The top surface of the boss abuts the bottom end of the arc-extinguishing magnetic steel assembly. Furthermore, a retaining wall is provided on the boss of the base to block the arc-extinguishing magnetic steel assembly from protruding into the housing. This structure ensures the strength of the product base while providing a larger internal space. The housing only partially encloses the magnetic steel portion, and the corresponding retaining wall is provided at the base of the product to abut the housing. The combination of the housing and the base blocks the contact between the magnetic steel and the relay, somewhat reducing the thermal degradation of the magnetic steel.

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the magnetic latching relay with arc-extinguishing magnetic steel of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention;

[0020] Figure 2 This is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention (rotated at one angle);

[0021] Figure 3 1 is a schematic structural diagram of the housing and the base in cooperation with each other in an embodiment of the present invention;

[0022] Figure 4 1 is a schematic diagram of the three-dimensional structure of the housing and arc-extinguishing magnetic steel assembly of an embodiment of the present invention;

[0023] Figure 5 1. It is a schematic structural diagram of the housing and the arc-extinguishing magnetic steel assembly in accordance with an embodiment of the present invention;

[0024] Figure 6 It is a cross-sectional view of the matching housing and arc-extinguishing magnetic steel assembly of an embodiment of the present invention. DETAILED DESCRIPTION

[0025] Example

[0026] See also Figures 1 to 6 As shown, a magnetic latching relay with an arc-extinguishing magnet of the present invention includes a housing 1, a base 2 and an arc-extinguishing magnet assembly 3; the bottom of the housing 1 is surrounded by the base 2 and fixed to the base 2, so as to form a cavity 10 between the housing 1 and the base 2 for assembling the main components of the magnetic latching relay, the main components of the magnetic latching relay include a contact part 51, a push card 52, an armature part 53, a magnetic circuit part 54, etc., the base 2 is also equipped with a bottom cover plate 55, and the magnetic latching relay is also equipped with an auxiliary contact part 56; a slot 4 is provided on the inner side of the side wall of the housing 1, the arc-extinguishing magnet assembly 3 is assembled in the slot 4 of the housing 1 and the position of the arc-extinguishing magnet assembly 3 is at a position corresponding to the matching position of the moving and static contacts in the main component; the arc-extinguishing magnet assembly 3 is composed of a thin sheet of arc-extinguishing magnet 31 and a thin sheet of magnetic isolation sheet 32 ​​stacked together; the arc-extinguishing magnet assembly 3 is fixed in the slot 4 of the housing 1 by an interference fit.

[0027] In this embodiment, the slot 4 is provided at the side wall 11 of the housing 1 and is composed of the side wall at the corresponding position of the housing 1 and a surrounding wall 12 with a U-shaped cross section.

[0028] In this embodiment, the side wall 11 of the outer shell 1 is composed of a first side wall 111 on the outside and a second side wall 112 on the inside, and the bottom end of the second side wall 112 is along the inner step 113 of the side wall 11 of the outer shell 1, and the inner step 113 of the side wall 11 of the outer shell 1 is placed on the base 2; in the second side wall 112, a removal portion 1121 is provided at a position corresponding to the slot 4 to constitute a part of the slot 4.

[0029] In this embodiment, a boss 21 is further provided in the base 2 at a position corresponding to the position of the housing 1 where the arc-extinguishing magnetic steel assembly 3 is assembled, and the top surface of the boss 21 abuts against the bottom end of the arc-extinguishing magnetic steel assembly 3 .

[0030] In this embodiment, the depth of the slot 4 is smaller than the height of the arc-extinguishing magnetic steel assembly 3, so that the lower section of the arc-extinguishing magnetic steel assembly 3 is exposed toward the inside of the outer shell 1; a retaining wall 22 is also provided on the boss 21 of the base 2, and the top of the retaining wall 22 reaches the bottom end of the surrounding wall 12 to block the arc-extinguishing magnetic steel assembly 3 from being exposed toward the inside of the outer shell.

[0031] In this embodiment, the upper end of the retaining wall 22, facing the arc-extinguishing magnetic steel assembly, is provided with an inclined surface 221. The inclined surface 221 is provided to facilitate assembly. The present invention utilizes the relatively low height of the retaining wall 22 to monitor contact gaps and detect overtravel between contacts.

[0032] In this embodiment, the thickness of the bottom end of the surrounding wall 12 is formed into arc shapes 121 on both sides.

[0033] In this embodiment, in the arc-extinguishing magnetic steel 31 and the magnetic isolation plate 32 stacked together, the arc-extinguishing magnetic steel 31 is arranged on the inner side facing the contact position of the moving and static contacts, and the magnetic isolation plate 32 is arranged on the outer side.

[0034] In this embodiment, the thickness of the arc-extinguishing magnetic steel 31 is greater than the thickness of the magnetic isolation plate 32 .

[0035] In this embodiment, two sides of the width of the magnetic isolation plate 32 are respectively provided with folded edges 321 , and the two folded edges 321 of the width of the magnetic isolation plate 32 respectively wrap around two sides of the width of the arc-extinguishing magnetic steel 31 .

[0036] The present invention provides a magnetic latching relay with an arc-extinguishing magnet, which has a slot 4 provided on the inner side of the side wall 11 of the housing 1. The arc-extinguishing magnet assembly 3 is assembled in the slot 4 of the housing 1 so that the position of the arc-extinguishing magnet assembly 3 is in a position corresponding to the position of the moving and static contacts in the main body. The arc-extinguishing magnet assembly 3 is composed of a thin arc-extinguishing magnet 31 and a thin magnetic isolation sheet 32 ​​stacked together. The arc-extinguishing magnet assembly 3 is fixed in the slot 4 of the housing 1 by an interference fit. This structure of the present invention, by adopting a thinner magnetic steel design and the form of the arc-extinguishing magnet assembly embedded in the housing, and the arc-extinguishing magnet assembly is composed of the arc-extinguishing magnet and the magnetic isolation sheet stacked together and interference fit in the housing, can increase the available space of the product while reducing the production cost of the product without sacrificing the product's arc extinguishing function through the magnetic steel. During assembly, the arc-extinguishing magnets contained in the housing and the latching magnets contained in the relay body can be magnetized separately. This effectively holds the magnets in place during magnetization, and magnetizing the housing independently prevents any impact on the magnets in the magnetic circuit or other components within the product. Magnetizing the housing eliminates the need for additional polarity verification, further reducing assembly costs. The assembly process also eliminates unnecessary components like magnet brackets, further reducing component costs.

[0037] The present invention provides a magnetic latching relay with an arc-extinguishing magnet. A boss 21 is provided in the base 2 at a position corresponding to the position of the housing 1 where the arc-extinguishing magnet assembly 3 is mounted. The top surface of the boss 21 abuts against the bottom end of the arc-extinguishing magnet assembly 3. A retaining wall 22 is also provided on the boss 21 of the base 2 to block the arc-extinguishing magnet assembly 3 from protruding into the housing. This structure of the present invention ensures the strength of the product base while providing a larger internal space. The housing only partially encloses the magnet. The housing is abutted against the housing by providing a corresponding retaining wall at the product base. The combination of the housing and the base blocks the contact between the magnet and the relay, reducing the thermal decay of the magnet to a certain extent.

[0038] 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 above in terms of a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the art can use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modifications, equivalent changes and modifications made to the above embodiments based on 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 magnetic latching relay with an arc-extinguishing magnet, comprising a housing, a base, and an arc-extinguishing magnet assembly; the bottom of the housing surrounds and is fixed to the base, thereby forming a cavity between the housing and the base for assembling the main body of the magnetic latching relay; characterized in that: A slot is provided on the inner side of the side wall of the shell, and the arc-extinguishing magnetic steel assembly is assembled in the slot of the shell and the position of the arc-extinguishing magnetic steel assembly is at a position corresponding to the matching position of the moving and static contacts in the main body component; the arc-extinguishing magnetic steel assembly is composed of thin-sheet arc-extinguishing magnetic steel and thin-sheet magnetic isolation sheets stacked together; the arc-extinguishing magnetic steel assembly is fixed in the slot of the shell by interference fit; the slot is provided at the side wall of the shell, and is composed of the side wall at the corresponding position of the shell and the surrounding wall with a U-shaped cross-section; the side wall of the shell is composed of a first side wall on the outside and a second side wall on the inside, and the bottom end of the second side wall is along the inner step of the side wall of the shell, and the inner step of the side wall of the shell is placed on the base; in the second side wall, a removal portion is provided at a position corresponding to the slot to constitute a part of the slot.

2. The magnetic latching relay with arc-extinguishing magnet according to claim 1, characterized in that: In the base, a boss is provided at a position corresponding to the position of the shell where the arc-extinguishing magnetic steel component is assembled, and the top surface of the boss abuts against the bottom end of the arc-extinguishing magnetic steel component.

3. The magnetic latching relay with arc-extinguishing magnet according to claim 2, characterized in that: The depth of the slot is smaller than the height of the arc-extinguishing magnetic steel assembly, so that the lower section of the arc-extinguishing magnetic steel assembly is exposed toward the inside of the shell; a retaining wall is also provided on the boss of the base, and the top of the retaining wall abuts against the bottom end of the surrounding wall to block the arc-extinguishing magnetic steel assembly from being exposed toward the inside of the shell.

4. The magnetic latching relay with arc-extinguishing magnet according to claim 3, characterized in that: The upper end of the retaining wall is further provided with an inclined surface on a side facing the arc-extinguishing magnetic steel assembly.

5. The magnetic latching relay with arc-extinguishing magnet according to claim 3, characterized in that: The thickness of the bottom end of the surrounding wall is respectively set to be in an arc shape on both sides.

6. The magnetic latching relay with arc-extinguishing magnet according to claim 1, characterized in that: In the arc-extinguishing magnetic steel and magnetic isolation plate stacked together, the arc-extinguishing magnetic steel is arranged on the inner side, and the magnetic isolation plate is arranged on the outer side.

7. The magnetic latching relay with arc-extinguishing magnet according to claim 6, characterized in that: The thickness of the arc-extinguishing magnetic steel is greater than the thickness of the magnetic isolation sheet.

8. The magnetic latching relay with arc-extinguishing magnet according to claim 7, characterized in that: Folding edges are respectively provided on both sides of the width of the magnetic isolation plate, and the two folding edges of the width of the magnetic isolation plate are respectively wrapped around both sides of the width of the arc-extinguishing magnetic steel.

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