Magnetic latching relay

Abstract

Provided in the present application is a magnetic latching relay, including a bottom plate, a housing, a first lead-out pin, a second lead-out pin, a coil lead-out pin, a magnetic circuit system and a contact system, wherein the contact system uses a double-contact anti-short-circuit structure; the housing and the bottom plate enclose the magnetic circuit system and the contact system in an internal space; and the first lead-out pin, the second lead-out pin and the coil lead-out pin penetrate the bottom surface of a base so as to be led out downwards, so that subsequent mounting and wiring of an electromagnetic relay can be facilitated, thereby also facilitating mounting and use by a customer. Moreover, the housing is mounted and fitted with the base, so that a closed space can be formed, thereby better protecting internal devices, and improving the adaptability of the electromagnetic relay to severe external environments. In addition, after the housing is mounted and fitted with the base, an adhesive can be dispensed on the bottom surface of the base to perform sealing, thereby further improving the leakproofness of the electromagnetic relay and the adaptability to external environments.

Description

A magnetic latching relay

[0001] This application claims priority to the Chinese patent application filed with the Patent Office of China on November 1, 2023, with application number 202322960959.7 and application name “A Magnetic Latching Relay”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the field of switching electrical appliances, and in particular to a magnetic latching relay. Background Art

[0003] Relays, as electronic control devices, control large currents using small ones. They are widely used in automatic control circuits, providing functions such as automatic regulation, safety protection, and circuit switching. A type of relay, the magnetic latching relay, is characterized by its contact open / close state being completely dependent on the action of a permanent magnet. To switch the contact open / close state, a pulsed electrical signal of a certain width is simply applied to the coil, and the contact state is then maintained by the permanent magnet. Consequently, magnetic latching relays, as low-energy components, are attracting increasing market attention.

[0004] The current magnetic latching relay product line includes newly developed DC magnetic latching relays specifically designed for DC meters in the new energy industry, primarily used in metering applications for new energy DC charging stations. Existing magnetic latching relays, used in standard household electricity meters, do not require adhesive sealing. Their short-circuit-resistant structure, with lead tabs extending from both sides, makes them difficult to seal and inconvenient for customers. Existing magnetic latching relays are used in applications such as new energy DC charging stations, which are subject to harsher operating environments than standard household meters. With the existing magnetic latching relay structure, the dynamic and static lead tabs extend from the side walls of the base, making adhesive sealing impossible.

[0005] Application Contents

[0006] To this end, in response to the above-mentioned problems, the present application provides a magnetic latching relay.

[0007] This application is implemented using the following solution:

[0008] The present application proposes a magnetic holding relay, comprising a base, a shell, a first lead pin, a second lead pin, a magnetic circuit system and a contact system; the contact system connects the first lead pin and the second lead pin; the magnetic circuit system is used to actuate the contact system, thereby making the first lead pin and the second lead pin conductive or disconnected; the magnetic circuit system and the contact system are installed on the base; the shell and the base are installed and matched to form an internal space within the shell and the base, and the shell and the base enclose the magnetic circuit system and the contact system in the internal space; wherein, the contact system adopts an anti-short-circuit structure, and the first lead pin and the second lead pin extend out of the internal space through the bottom plate of the base.

[0009] In one embodiment, the shell has a shell side wall, and the base has a base side surface. After the shell and the base are installed and matched, the shell side wall completely covers the base side surface, and a glue groove is formed adjacent to the shell side wall and the bottom surface of the base.

[0010] In one embodiment, the magnetic latching relay further includes a coil lead-out pin, the magnetic circuit system is connected to the coil lead-out pin, the coil lead-out pin extends downward through the bottom plate and out of the internal space, and a glue groove is formed around the coil lead-out pin on the bottom plate.

[0011] In one embodiment, two pin slots are provided on the bottom plate of the base, and the first lead pin and the second lead pin pass through the two pin slots respectively and then come out.

[0012] In one embodiment, glue dispensing grooves are formed on the bottom plate around the first lead pin and the second lead pin respectively.

[0013] In one embodiment, the contact system includes a first lead-out piece, a first movable spring, a second lead-out piece and a second movable spring; the first lead-out piece and the second lead-out piece are fixedly mounted on the base, and the first lead-out piece and the second lead-out piece are respectively connected to the first lead-out pin and the second lead-out pin, and the first movable spring and the second movable spring are arranged in parallel and side by side, so that the first movable spring and the second movable spring form a parallel movable spring assembly; the first lead-out piece is fixedly connected to one end of the first movable spring, and the second lead-out piece is fixedly connected to one end of the second movable spring, and the first lead-out piece and the second lead-out piece are respectively located at different ends of the parallel movable spring assembly.

[0014] In one embodiment, a first mounting slot and a second mounting slot are provided on the base, the first mounting slot is used to install the contact system, and the second mounting slot is used to install the magnetic circuit system; the first mounting slot and the second mounting slot are arranged side by side on the base; the first movable spring and the second movable spring are arranged in parallel and side by side in the first mounting slot and are located on the side of the first mounting slot away from the second mounting slot, and a pin slot is provided on the bottom surface of the first mounting slot, and the pin slot is arranged on the side of the bottom surface of the first mounting slot away from the second mounting slot.

[0015] In one embodiment, the first movable spring has a first fixed end and a first cantilever end, and the first fixed end of the first movable spring is fixedly connected to the first lead-out piece; the second movable spring has a second fixed end and a second cantilever end, and the second fixed end of the second movable spring is fixedly connected to the second lead-out piece; the first fixed end of the first movable spring is opposite to the second cantilever end of the second movable spring, and the first cantilever end of the first movable spring is opposite to the second fixed end of the second movable spring; the first fixed end and the second cantilever end are respectively provided with a first static contact and a second movable contact facing each other, and the second fixed end and the first cantilever end are respectively provided with a second static contact and a first movable contact facing each other.

[0016] In one embodiment, the magnetic circuit system includes a coil, an armature assembly, a first push card, and a second push card, and the armature assembly is rotatably mounted on the base; the coil is connected to a coil lead-out pin, and the coil lead-out pin passes through the bottom surface of the base and is led downward; the first push card and the second push card are movably mounted on the base, and the two ends of the armature assembly are respectively connected to one end of the first push card and one end of the second push card; the other end of the first push card is connected to the first cantilever end of the first movable spring sheet, and the other end of the second push card is connected to the second cantilever end of the second movable spring sheet.

[0017] In one embodiment, the first lead-out piece and the second lead-out piece are integrally formed with the first lead-out pin and the second lead-out pin, respectively.

[0018] The technical solution provided by this application has the following technical effects:

[0019] 1. The first lead pin, second lead pin, and coil lead pin of the present application are led downward through the bottom surface of the base, which can facilitate the subsequent installation and wiring of the electromagnetic relay, thereby facilitating installation and use by customers. In addition, the housing and the base are installed and matched to form an enclosed space, thereby improving the protection of internal components and improving the adaptability of the electromagnetic relay to harsh external environments. The closed structure formed by the housing and the base makes the contact system with an anti-short-circuit structure less affected by harsh external environments, which can improve the anti-short-circuit performance of the contact system.

[0020] 2. After the housing of the present application is assembled and matched with the base, glue can be applied on the bottom surface of the base for sealing, thereby further improving the airtightness of the electromagnetic relay and its adaptability to the external environment.

[0021] 3. After the electromagnetic relay housing is assembled and matched with the base, glue is applied around the pins to seal them, thereby further improving the airtightness and adaptability of the electromagnetic relay to the external environment, and improving the insulation performance between the first lead pin and the second lead pin. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG1 is a perspective view of a magnetic latching relay;

[0023] FIG2 is a perspective view of the magnetic latching relay in the direction of the base;

[0024] FIG3 is a front view of the magnetic latching relay with the housing removed;

[0025] FIG4 is a perspective view of the base;

[0026] FIG5 is a perspective view of a magnetic circuit system and a contact system;

[0027] FIG6 is a perspective view of the magnetic circuit system and the contact system from another direction. Specific embodiments

[0028] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0029] It should be understood that references throughout this specification to "one embodiment" or "an embodiment" mean that a particular feature, structure, or characteristic associated with the embodiment is included in at least one embodiment of the present application. Therefore, the appearances of "in one embodiment" or "in an embodiment" throughout this specification do not necessarily refer to the same embodiment. Furthermore, these particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

[0030] To further illustrate various embodiments, this application includes accompanying drawings. These drawings form part of the disclosure and are primarily used to illustrate the embodiments and, in conjunction with the relevant description in the specification, to explain the operating principles of the embodiments. By referring to these drawings, those skilled in the art will understand other possible implementations and the advantages of this application. The components in the figures are not drawn to scale, and similar reference numerals are generally used to represent similar components.

[0031] The present application will now be further described with reference to the accompanying drawings and specific implementation methods.

[0032] As shown in Figures 1-6, the present application provides a magnetic latching relay comprising a base 20, a housing 10, a first lead pin 30, a second lead pin 40, a coil lead pin 50, a magnetic circuit system 60, and a contact system 70. The contact system 70 connects the first lead pin 30 and the second lead pin 40. The magnetic circuit system 60 is used to actuate the contact system 70, enabling the contact system 70 to connect or disconnect the first lead pin 30 and the second lead pin 40. The magnetic circuit system 60 is connected to the coil lead pin 50, which is used to connect a control circuit to control the actuation of the contact system 70 by the magnetic circuit system 60. The magnetic circuit system 60 and the contact system 70 are mounted on the base 20. The housing 10 and the base 20 are mounted and matched to form an internal space within the housing 10 and the base 20, and the housing 10 and the base 20 enclose the magnetic circuit system 60 and the contact system 70 within the internal space. The contact system 70 adopts an anti-short circuit structure, and the first lead pin 30, the second lead pin 40, and the coil lead pin 50 extend downward and out of the internal space through the bottom surface of the base 20. As shown in Figure 1, in this application, the shape of the first lead pin 30 and the shape of the second lead pin 40 can both be sheet-shaped.

[0033] The first lead pin 30, the second lead pin 40, and the coil lead pin 50 are led downward through the bottom surface of the base 20, which can facilitate the subsequent installation and wiring of the electromagnetic relay, thereby facilitating installation and use by customers. In addition, after the first lead pin 30, the second lead pin 40, and the coil lead pin 50 are led downward through the bottom surface of the base 20, it is easier to install and match the housing 10 with the base 20, forming an enclosed space, thereby improving the protection of internal components and improving the adaptability of the electromagnetic relay to harsh external environments. In addition, the closed structure formed by the housing 10 and the base 20 makes the contact system 70 with an anti-short-circuit structure less affected by harsh external environments, which can improve the anti-short-circuit performance of the contact system 70.

[0034] As shown in Figures 1-3, the shell 10 has a shell side wall 11, and the base 20 has a base side surface 24. After the shell 10 and the base 20 are installed and matched, the shell side wall 11 completely covers the base side surface 24, and a glue groove 25 is formed adjacent to the shell side wall 11 and the bottom surface of the base 20, as shown in Figure 2; the glue groove is provided so that glue can be sealed between the bottom surface of the base 20 and the shell side wall 11, thereby further improving the airtightness of the electromagnetic relay and its adaptability to the external environment.

[0035] As shown in Figures 2-4, two pin slots 21 are provided on the bottom plate of the base 20. The first lead pin 30 and the second lead pin 40 extend through the two pin slots 21 and then exit. Glue dispensing grooves 26 are formed on the bottom plate around the first lead pin 30 and the second lead pin 40, as shown in Figure 2. These dispensing grooves allow for adhesive sealing between the first lead pin 30 and the second lead pin 40 and the pin slots 21, further improving the electromagnetic relay's airtightness and adaptability to external environments, and enhancing the insulation performance between the first lead pin 30 and the second lead pin 40.

[0036] In addition, as shown in Figure 2, a glue dispensing groove 27 is also formed around the coil lead pin 50 on the bottom plate of the base 20; the glue dispensing groove is provided so that glue can be dispensed and sealed between the coil lead pin 50 and the bottom plate of the base 20, thereby further improving the airtightness and adaptability of the electromagnetic relay to the external environment, and improving the insulation performance between the coil lead pins 50.

[0037] As shown in Figure 3, the contact system 70 employs a dual-contact short-circuit-resistant structure. Specifically, the contact system 70 includes a first lead-out piece 71, a first movable spring piece 73, a second lead-out piece 72, and a second movable spring piece 74. The first lead-out piece 71 and the second lead-out piece 72 are fixedly mounted on the base 20, and the first movable spring piece 73 and the second movable spring piece 74 are arranged parallel to the base 20. The first lead-out piece 71 and the second lead-out piece 72 are connected to the first lead pin 30 and the second lead pin 40, respectively. Optionally, the first lead-out piece 71 and the second lead-out piece 72 can be integrally formed with the first lead pin 30 and the second lead pin 40, respectively.

[0038] As shown in Figures 2-4, the base 20 is provided with a first mounting slot 220 and a second mounting slot 230. The first mounting slot 220 is used to mount the contact system 70, and the second mounting slot 230 is used to mount the magnetic circuit system 60. The first mounting slot 220 and the second mounting slot 230 are arranged side by side on the base 20. A first movable spring 73 and a second movable spring 74 are arranged parallel and side by side within the first mounting slot 220 and located on the side of the first mounting slot 220 away from the second mounting slot 230. The first movable spring 73 and the second movable spring 74 form a parallel movable spring assembly. The bottom surface of the first mounting slot 220 is provided with a pin slot 21, which is located on the side of the bottom surface of the first mounting slot 220 away from the second mounting slot 230. A first lead tab 71 is fixedly connected to one end of the first movable spring 73, and a second lead tab 72 is fixedly connected to one end of the second movable spring 74. The first lead tab 71 and the second lead tab 72 are located at different ends of the parallel movable spring assembly. Because the first and second movable springs 73, 74 are arranged parallel and side by side within the first mounting slot 220, and the first and second lead pieces 71, 72 are located at opposite ends of the parallel movable spring assembly, this structure facilitates the arrangement of the first and second lead pins 30, 40, respectively connected to the first and second lead pieces 71, 72, so that they extend downward through the bottom surface of the base 20. This facilitates subsequent installation and wiring of the electromagnetic relay, making it easier for customers to install and use it. Furthermore, it further improves the sealing performance of the electromagnetic relay.

[0039] As shown in Figure 3, specifically, in this embodiment, the first movable spring 73 has a first fixed end and a first cantilever end. The first fixed end of the first movable spring 73 is fixedly connected to the first lead-out piece 71, so that the first movable spring 73 is in a cantilevered state. The second movable spring 74 has a second fixed end and a second cantilevered end. The second fixed end of the second movable spring 74 is fixedly connected to the second lead-out piece 72, so that the second movable spring 74 is in a cantilevered state. The first fixed end of the first movable spring 73 is opposite to the second cantilevered end of the second movable spring 74, and the first cantilevered end of the first movable spring 73 is opposite to the second fixed end of the second movable spring 74.

[0040] A first static contact 75 and a first movable contact 78 are respectively provided on the first fixed end and the first cantilever end of the first movable spring 73. A second static contact 77 and a second movable contact 76 are respectively provided on the second fixed end and the second cantilever end of the second movable spring 74. The first static contact 75 and the second movable contact 76 are arranged opposite each other, while the first movable contact 78 and the second static contact 77 are arranged opposite each other. After the housing 10 and the base 20 are assembled and mated, a glue seal is applied to the bottom surface of the base 20 to improve the airtightness of the electromagnetic relay. The contact system 70 adopts a dual-contact short-circuit resistant structure. This dual-contact short-circuit resistant structure is less susceptible to external environmental influences, further enhancing the overall short-circuit resistance of the electromagnetic relay.

[0041] As shown in Figure 3, the magnetic circuit system 60 includes a coil 61, an armature assembly 62, a first push clip 63, and a second push clip 64. The armature assembly 62 is rotatably mounted on the base 20. The coil 61 is connected to the coil lead pin 50, which extends downward through the bottom surface of the base 20. The coil 61 is installed horizontally within the second mounting slot 230, making it easier to position the coil lead pin 50 downward through the bottom surface of the base 20. A permanent magnet is positioned in the center of the armature assembly 62. The armature assembly 62 can be actuated by the variable-polarity coil 61, thereby rotating on the base 20. The first push clip 63 and the second push clip 64 are movably mounted on the base 20. The ends of the armature assembly 62 are connected to one end of the first push clip 63 and one end of the second push clip 64, respectively, so that rotation of the armature assembly 62 causes the first push clip 63 and the second push clip 64 to move in opposite directions. The other end of the first push card 63 is connected to the first cantilever end of the first movable spring 73, and the other end of the second push card 64 is connected to the second cantilever end of the second movable spring 74, so that the first push card 63 and the second push card 64 move in opposite directions, respectively, so that the two sets of movable and static contacts, namely the first static contact 75 and the second movable contact 76, and the first movable contact 78 and the second static contact 77, are connected or disconnected together.

[0042] The contact system 70 adopts a double-contact anti-short-circuit structure. Compared with a single-contact structure, when a large current flows through the contact point, an electric force will be generated on the contact surface of the contact point. This electric force will cause loss on the contact surface and contact adhesion. In order to prevent the above problems from occurring, a double-contact anti-short-circuit structure is adopted. When a large current flows through the contact, the current is diverted to each contact point of the double contact point, making the current passing through a single contact point smaller. At this time, the electric force generated by the contact surface of the contact point becomes smaller, thereby achieving the purpose of reducing contact consumption and preventing adhesion. Therefore, the double-contact structure is resistant to short circuits and has better lightning strike performance than the single-contact structure.

[0043] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0044] Although alternative embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including alternative embodiments and all changes and modifications that fall within the scope of the present invention.

[0045] The above is a detailed introduction to the technical solution provided by the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. At the same time, for those skilled in the art, according to the principles and implementation methods of the present application, there may be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present application.

Claims

1. A magnetic latching relay, comprising a base, a housing, a first lead pin, a second lead pin, a magnetic circuit system and a contact system; the contact system connects the first lead pin and the second lead pin; the magnetic circuit system is used to actuate the contact system, thereby connecting or disconnecting the first lead pin and the second lead pin; the magnetic circuit system and the contact system are installed on the base; the housing is installed and matched with the base, so that an internal space is formed in the housing and the base, and the housing and the base cover the magnetic circuit system and the contact system in the internal space; wherein, The contact system adopts an anti-short circuit structure, and the first lead pin and the second lead pin extend through the bottom plate of the base and extend out of the internal space.

2. The magnetic latching relay according to claim 1, wherein: The shell has a shell side wall, and the base has a base side surface. After the shell and the base are installed and matched, the shell side wall completely covers the base side surface, and a glue groove is formed at the junction of the shell side wall and the bottom surface of the base.

3. The magnetic latching relay according to claim 1, wherein: The magnetic latching relay also includes a coil lead pin, the magnetic circuit system is connected to the coil lead pin, the coil lead pin extends downward through the bottom plate and out of the internal space, and a glue groove is formed on the bottom plate around the coil lead pin.

4. The magnetic latching relay according to claim 1, wherein: Two pin grooves are arranged on the bottom plate of the base, and the first lead pin and the second lead pin respectively pass through the two pin grooves and then come out.

5. The magnetic latching relay according to claim 1, wherein: Glue dispensing grooves are formed on the bottom plate around the first lead pin and the second lead pin respectively.

6. The magnetic latching relay according to claim 1, wherein: The contact system includes a first lead-out piece, a first movable spring piece, a second lead-out piece and a second movable spring piece; the first lead-out piece and the second lead-out piece are fixedly mounted on the base, and the first lead-out piece and the second lead-out piece are respectively connected to the first lead-out pin and the second lead-out pin, the first movable spring piece and the second movable spring piece are arranged in parallel and side by side, so that the first movable spring piece and the second movable spring piece form a parallel movable spring piece assembly; the first lead-out piece is fixedly connected to one end of the first movable spring piece, the second lead-out piece is fixedly connected to one end of the second movable spring piece, and the first lead-out piece and the second lead-out piece are respectively located at different ends of the parallel movable spring piece assembly.

7. The magnetic latching relay according to claim 6, wherein: A first mounting groove and a second mounting groove are provided on the base, the first mounting groove is used to install the contact system, and the second mounting groove is used to install the magnetic circuit system; the first mounting groove and the second mounting groove are arranged side by side on the base; the first movable spring piece and the second movable spring piece are arranged in parallel and side by side in the first mounting groove and are located on a side of the first mounting groove away from the second mounting groove, and a pin groove is provided on the bottom surface of the first mounting groove, and the pin groove is arranged on a side of the bottom surface of the first mounting groove away from the second mounting groove.

8. The magnetic latching relay according to claim 6, wherein: The first movable spring piece has a first fixed end and a first cantilever end, and the first fixed end of the first movable spring piece is fixedly connected to the first lead-out piece; the second movable spring piece has a second fixed end and a second cantilever end, and the second fixed end of the second movable spring piece is fixedly connected to the second lead-out piece; the first fixed end of the first movable spring piece is opposite to the second cantilever end of the second movable spring piece, and the first cantilever end of the first movable spring piece is opposite to the second fixed end of the second movable spring piece; the first fixed end and the second cantilever end are respectively provided with a first static contact and a second moving contact facing each other, and the second fixed end and the first cantilever end are respectively provided with a second static contact and a first moving contact facing each other.

9. The magnetic latching relay according to claim 8, wherein: The magnetic circuit system includes a coil, an armature assembly, a first push card, and a second push card. The armature assembly is rotatably mounted on the base. The coil is connected to a coil lead-out pin, and the coil lead-out pin passes through the bottom surface of the base and is led downward. The first push card and the second push card are movably mounted on the base, and the two ends of the armature assembly are respectively connected to one end of the first push card and one end of the second push card; the other end of the first push card is connected to the first cantilever end of the first moving spring sheet, and the other end of the second push card is connected to the second cantilever end of the second moving spring sheet.

10. The magnetic latching relay according to claim 6, wherein: The first lead-out piece and the second lead-out piece are integrally formed with the first lead-out pin and the second lead-out pin, respectively.

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