Contact structure of magnetic latching relay

Abstract

The utility model discloses a contact structure of a magnetic latching relay, which comprises a terminal assembly, a moving contact piece, a normally-closed contact group and a normally-open contact group which are arranged in a shell, and the normally-open contact group comprises a first contact and a second contact which are electrically connected with a first terminal and a third terminal respectively. The normally closed contact group comprises a third contact and a fourth contact which are electrically connected with the first terminal and the fourth terminal respectively, and the first contact and the third contact are oppositely arranged on the U-shaped bending part of the first connecting plate and are jointly connected with the first terminal through the first connecting plate; by designing the second connecting plate into the U-shaped structure, the arrangement requirements of the first contact and the third contact can be met, and meanwhile, the movement of the moving contact piece is avoided, so that the arrangement requirements of a group of normally open contacts and normally closed contacts can be met by only needing three terminal structures, the number of terminals is reduced, mounting parts are reduced, the mounting occupied space is small, and the mounting efficiency is improved. And the product cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of low-voltage electrical appliances, in particular to a magnetic latching relay contact structure. Background Art

[0002] A latching relay is an electronic control device that performs functions such as automatic regulation, safety protection, and circuit switching in circuits. Its normally closed or normally open state is entirely dependent on the action of a permanent magnet, and its switching state is triggered by a pulsed electrical signal of a certain width. With the national initiative for energy conservation and environmental protection, latching relays are gradually replacing conventional electromagnetic relays and are widely used in power protection, automation, motion control, remote control, measurement, and communications.

[0003] With the rapid development of low-carbon economy and energy-saving and emission reduction technologies, magnetic latching relays are currently needed in charging piles. A magnetic latching relay is installed on the control board of the charging pile. After the charging pile scans the code for payment, it will connect to the power supply and start charging. The conversion from the off-state to the energized state is all controlled by the relay switching. The existing magnetic latching relay includes a housing, an electromagnetic mechanism, a slider, and a main contact assembly for conducting or disconnecting the external main circuit. In order to achieve the switching of at least one set of contacts between normally open and normally closed functions, the main contact assembly includes at least two pairs of static reeds relatively inserted on the housing. The slider is provided with a moving reed located between the two static reeds. The driving slider, driven by the electromagnetic mechanism, drives the moving reed to contact the two pairs of static reeds respectively. These two pairs of static reeds have a total of four reed pins welded to the control board. At the same time, two pairs of terminal blocks connected to the two pairs of static reeds need to be provided on the control board. Setting a set of normally open and normally closed outputs of the relay requires at least two pairs of static reeds and two pairs of terminal blocks. The installation of many parts is large, the installation occupies a large space, the installation connection is inconvenient, and the installation cost is high. Utility Model Content

[0004] The technical problem to be solved by the present invention is to overcome the problem in the prior art that a relay setting a set of normally open and normally closed outputs requires at least two pairs of static springs and two pairs of terminal blocks, which results in many components to be installed, a large installation space and high installation costs.

[0005] In order to solve the above technical problems, the utility model provides a magnetic latching relay contact structure, comprising a terminal assembly arranged in a housing, a moving contact piece, and a normally closed contact group and a normally open contact group arranged on both sides of the moving contact piece. The moving contact piece is driven by an electromagnetic mechanism to contact the normally closed contact group or the normally open contact group. It is characterized in that: the terminal assembly comprises a first terminal, a second terminal and a third terminal arranged in the housing, the normally open contact group comprises a first contact and a second contact electrically connected to the first terminal and the second terminal respectively, and the normally closed contact group comprises a third contact and a fourth contact electrically connected to the first terminal and the third terminal respectively. The first terminal is connected to the first contact and the third contact respectively through a first connecting plate, and the first connecting plate is bent to form a U-shaped bending portion passing under the moving contact member, and the first contact and the third contact are relatively arranged on the side walls of the U-shaped bending portion, and the second contact and the fourth contact are respectively arranged on the upper sides of the first contact and the third contact, and the moving contact member extends into the U-shaped cavity in the U-shaped bending portion to move back and forth. During the reciprocating movement, the moving contact member has a normally open state in which the first contact and the second contact are in contact and conducted, and a normally closed state in which the third contact and the fourth contact are in contact and conducted.

[0006] As a preferred solution, when the movable contact member contacts the normally open contact group, a normally open circuit is formed that passes through the first terminal, the first contact, the second contact and the second terminal.

[0007] As a preferred solution, when the movable contact member contacts the normally closed contact group, a normally closed circuit is formed that passes through the first terminal, the third contact, the fourth contact and the third terminal.

[0008] As a preferred solution, the movable contact member is a bridge-shaped movable contact having two contact parts, one of which is arranged between the first contact and the third contact, and the other is arranged between the third contact and the fourth contact.

[0009] As a preferred solution, the housing includes a first mounting groove for mounting the electromagnetic mechanism and a second mounting groove arranged beside the first mounting groove, and the electromagnetic mechanism is linked to the moving contact member through a push rod structure.

[0010] As a preferred solution, a current transformer is provided in the second mounting slot, and the first connecting plate is extended in the second mounting slot and passes through the current transformer, so as to detect current information on the first connecting plate through the current transformer.

[0011] As a preferred solution, the first terminal and the third terminal are adjacently spaced apart and arranged at one end of the shell, the second terminal and the grounding terminal are adjacently spaced apart and arranged at the other end of the shell, the second terminal is connected to the second contact through a second connecting plate, and the third terminal is connected to the fourth contact through a third connecting plate, and a contact groove suitable for accommodating a normally closed contact group and a normally open contact group is provided in the shell, and the contact groove is located between the second mounting groove and the second terminal, the first connecting plate extends through the second mounting groove to the contact groove, the second connecting plate extends from one side of the second terminal to the contact groove, and the third connecting plate extends through the first mounting groove to the contact groove.

[0012] As a preferred solution, the housing is provided with a first limiting groove which forms a limiting cooperation with the first connecting plate, and the first limiting groove is provided at both ends of the second mounting groove respectively;

[0013] The housing is provided with a second limiting groove which forms a limiting fit with the second connecting plate, and the second limiting groove is provided at one end of the contact groove close to the second terminal;

[0014] The housing is provided with a third limiting groove which forms a limiting match with the third connecting plate, and the third limiting grooves are respectively provided at both ends of the first mounting groove.

[0015] As a preferred solution, the shell includes a shell cover and a shell base connected by snaps, and the shell cover is provided with a group of first connection holes corresponding to the position of the electromagnetic mechanism and a group of second connection holes corresponding to the position of the current transformer.

[0016] The technical solution of the utility model has the following advantages over the prior art:

[0017] 1. In the contact structure of the magnetic latching relay provided by the present invention, the movable contact member conducts a normally closed circuit when in contact with the normally closed contact group, and conducts a normally open circuit when in contact with the normally open contact group, thereby achieving switching control between a group of normally open circuits and a normally closed circuit. The normally open contact group includes a first contact and a second contact electrically connected to the first terminal and the third terminal, respectively. The normally closed contact group includes a third contact and a fourth contact electrically connected to the first terminal and the fourth terminal, respectively. The first contact and the third contact are relatively arranged on the U-shaped bend portion of the same first connecting plate, thereby achieving common connection with the first terminal through the first connecting plate. By adopting this technical solution, the layout requirements of the first contact and the third contact can be met by designing the second connecting plate into a U-shaped structure, while avoiding the movement of the moving contact member. The first terminal set in this way is used as a common input terminal for the normally closed circuit and the normally closed circuit, the second terminal is used as an output terminal for the normally open circuit, and the third terminal is used as an output terminal for the normally closed circuit. In this way, only three wiring terminals are needed to meet the setting requirements of a group of normally open contacts and normally closed contacts, which is beneficial to reducing the number of wiring terminals and connecting plates, simplifying the structure, reducing the installation components, and taking up less installation space, which is beneficial to reducing product costs.

[0018] 2. In the contact structure of the magnetic latching relay provided by the present invention, the current transformer is built-in and installed in the second mounting slot of the shell, so that the first connecting plate is extended and set in the second mounting slot and passes through the current transformer. The current transformer is used to detect the current information on the first connecting plate. Since the first terminal serves as the common incoming terminal of the normally closed circuit and the normally closed circuit, that is, the current of the normally closed circuit and the normally closed circuit will flow through the first connecting plate, therefore, only one current transformer is needed to meet the purpose of the relay to realize current detection for the normally open circuit and the normally closed circuit. Compared with the traditional use of two current transformers, one current transformer can be reduced, thereby saving costs. The magnetic latching relay designed using this technical solution accurately measures the magnitude of the incoming current through the current transformer and provides real-time power information. According to the power information, an early warning can be issued before a fault occurs, thereby avoiding the loss caused by circuit faults (short circuit or overload fault) to ensure the normal operation of the line and equipment.

[0019] 3. In the magnetic holding relay contact structure provided by the present invention, the first limiting groove, the second limiting groove and the third limiting groove respectively play a limiting installation role for the first connecting plate, the second connecting plate and the third connecting plate in the shell to prevent the first, second and third connecting plates from positional displacement, and the installation stability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for the specific implementation or the description of the prior art.

[0021] Figure 1 This is a schematic planar structural diagram of the contact structure of the magnetic latching relay of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the magnetic latching relay contact structure of the present invention after the housing is hidden;

[0023] Figure 3 for Figure 2 A side view of the contact structure of the magnetic latching relay shown;

[0024] Figure 4 This is a schematic diagram of the internal structure of the housing of the present utility model;

[0025] Figure 5 It is a top view of the structure of the present utility model.

[0026] Explanation of the accompanying drawings: 1. First terminal; 11. First connecting plate; 12. U-shaped bending portion; 2. Second terminal; 21. Second connecting plate; 3. Third terminal; 31. Third connecting plate; 4. Current transformer; 5. Moving contact member; 6. Normally open contact group; 61. First contact; 62. Second contact; 7. Normally closed contact group; 71. Third contact; 72. Fourth contact; 8. Electromagnetic mechanism; 80. Push rod structure; 81. Magnetic yoke; 82. Coil structure; 83. Permanent magnet; 9. Housing; 91. First mounting slot; 92. Second mounting slot; 93. Contact slot; 94. First limiting slot; 95. Second limiting slot; 96. Third limiting slot; 97. First connecting hole; 98. Second connecting hole; 901. Housing cover. DETAILED DESCRIPTION

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0028] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0029] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0030] Example

[0031] This embodiment provides Figure 1-5 The magnetic latching relay contact structure includes a terminal assembly provided in a housing 9, a moving contact piece 5, and a normally closed contact group 7 and a normally open contact group 6 relatively provided on both sides of the moving contact piece 5. The magnetic latching relay is provided with an electromagnetic mechanism 8 for driving the moving contact piece 5 to move back and forth. The moving contact piece 5 is driven by the electromagnetic mechanism 8 to contact the normally closed contact group 7 or the normally open contact group 6. The terminal assembly includes a first terminal 1, a second terminal 2, and a third terminal 3 provided in the housing 9. The normally open contact group 6 includes a first contact 61 and a second contact 62 electrically connected to the first terminal 1 and the second terminal 2, respectively. The normally closed contact group 7 includes a third contact 71 and a fourth contact 72 electrically connected to the first terminal 1 and the third terminal 3, respectively. Contact 72, the first terminal 1 is connected to the first contact 61 and the third contact 71 respectively through the first connecting plate 11, the first connecting plate 11 is bent to form a U-shaped bending portion 12 that passes under the movable contact member 5, the first contact 61 and the third contact 71 are relatively arranged on the side walls of the U-shaped bending portion 12, the second contact 62 and the fourth contact 72 are respectively arranged on the upper side of the first contact 61 and the third contact 71, and the movable contact member 5 extends into the U-shaped cavity in the U-shaped bending portion 12 and moves back and forth. During the reciprocating movement, the movable contact member 5 has a normally open state in which the first contact 61 and the second contact 62 are in contact and conducted, and a normally closed state in which the third contact 71 and the fourth contact 72 are in contact and conducted.

[0032] The above embodiment is the core technical solution of this embodiment. When the moving contact member 5 contacts the normally closed contact group 7, the normally closed circuit is conducted, and when the moving contact member 5 contacts the normally open contact group 6, the normally open circuit is conducted, thereby realizing the switching control of a group of normally open circuits and normally closed circuits. The normally open contact group 6 includes a first contact 61 and a second contact 62 electrically connected to the first terminal 1 and the third terminal 3 respectively. The normally closed contact group 7 includes a third contact 71 and a fourth contact 72 electrically connected to the first terminal 1 and the fourth terminal respectively. The first contact 61 and the third contact 71 are relatively arranged on the U-shaped bending portion 12 of the same first connecting plate 11, so that the first connecting plate 11 is connected to the first terminal 3 through the first connecting plate 11. Sub-1 realizes common connection. By adopting the technical solution, the second connecting plate 21 is designed to be a U-shaped structure to meet the layout requirements of the first contact 61 and the third contact 71, while avoiding the movement of the moving contact member. The first terminal set in this way is used as a common input terminal for the normally closed circuit and the normally closed circuit, the second terminal is used as an output terminal for the normally open circuit, and the third terminal is used as an output terminal for the normally closed circuit. In this way, only three wiring terminals are needed to meet the setting requirements of a group of normally open contacts and normally closed contacts, which is beneficial to reducing the number of wiring terminals and connecting plates, simplifying the structure, reducing the installation components, and taking up less installation space, which is beneficial to reducing product costs.

[0033] It is further preferred that the moving contact piece 5 is a bridge-shaped moving contact having two contact parts, and the two contact parts are two moving contacts arranged at both ends of the bridge-shaped moving contact, one of the contact parts is arranged between the first contact 61 and the third contact 71, and the other contact part is arranged between the second contact 62 and the fourth contact 72. With this structural arrangement, when the moving contact piece 5 contacts with the normally open contact group 6, it is connected to form a normally open circuit passing through the first terminal 1, the first contact 61, the second contact 62 to the second terminal 2, so that the relay is in a working state of connecting the normally open circuit; when the moving contact piece 5 contacts with the normally closed contact group 7, it is connected to form a normally closed circuit passing through the first terminal 1, the third contact 71, the fourth contact 72 to the third terminal 3, so that the relay is in a working state of connecting the normally closed circuit.

[0034] In this embodiment, reference Figure 1 and Figure 4The housing 9 includes a first mounting groove 91 for mounting an electromagnetic mechanism and a second mounting groove 92 arranged next to the first mounting groove 91. The electromagnetic mechanism is linked to the moving contact member 5 through a push rod structure 80. As a specific structural setting, the electromagnetic mechanism 8 includes a yoke 81, a coil structure 82, an iron core structure and a permanent magnet 83. The yoke 81 is a closed structure and forms a coil groove surrounding the coil structure 82. The iron core structure is movably arranged inside the coil structure 82 and has a driving rod extending from one end of the yoke 81 to form a linkage with the push rod structure 80. The coil structure 82 of this magnetic latching relay is connected to the push rod structure 80. Changing the direction and magnitude of the current can change the direction of the magnetic field. Therefore, the iron core moves back and forth under the action of two opposite magnetic field forces generated by the coil structure 82, and drives the moving contact piece 5 to contact the normally open contact group 6 or the normally closed contact group 7 through the push rod structure 80. The permanent magnet 83 is arranged between the coil structure 82 and the yoke 81. The iron core structure maintains attraction with one end of the yoke 81 when the moving contact piece 5 contacts the normally open contact group 6, and maintains attraction with the other end of the yoke 81 when the moving contact piece 5 contacts the normally closed contact group 7, thereby realizing the magnetic holding function of the relay that keeps the contacts connected or disconnected when the coil is de-energized.

[0035] As a preferred embodiment, a current transformer 4 is provided in the second mounting slot 92, and the first connecting plate 11 is extended in the second mounting slot 92 and passes through the current transformer 4. In this structural arrangement, the current transformer 4 is installed in the second mounting slot 92 of the housing, so that the first connecting plate 11 is extended in the second mounting slot 92 and passes through the current transformer 4. The current transformer 4 is used to detect the current information on the first connecting plate 11. According to the first terminal 1 being a common input terminal for the normally closed circuit and the normally closed circuit, that is, the current of the normally closed circuit and the normally closed circuit will be The current flows through the first connecting plate 11, so only one current transformer 4 is needed to meet the purpose of the relay to detect the current for the normally open circuit and the normally closed circuit. Compared with the traditional method of using two current transformers, one current transformer can be reduced, thereby saving costs. The magnetic latching relay designed with this technical solution accurately measures the magnitude of the incoming current through the current transformer 4, and provides real-time power information. According to the power information, it can give an early warning before a fault occurs, thereby avoiding the loss caused by circuit faults (short circuit or overload fault) to ensure the normal operation of the line and equipment.

[0036] Combine Figure 1-4As shown, the first terminal 1 and the third terminal 3 are adjacently spaced and arranged at one end of the housing 9, the second terminal 2 and the grounding terminal are adjacently spaced and arranged at the other end of the housing 9, the second terminal 2 is connected to the second contact 62 through the second connecting plate 21, and the third terminal 3 is connected to the fourth contact 72 through the third connecting plate 31. A contact groove 93 suitable for accommodating the normally closed contact group 7 and the normally open contact group 6 is provided in the housing 9, and the contact groove 93 is located between the second mounting groove 92 and the second terminal 2, and the first connecting plate 11 passes through the second mounting groove 92. The slot 92 extends into the contact slot 93 and connects the first contact 61 and the third contact 71 through the U-shaped bending portion 12; the second connecting plate 21 extends from one side of the second terminal 2 into the contact slot 93 and connects the second contact 62, and the third connecting plate 31 extends through the first mounting slot 91 to the contact slot 93 and connects the fourth contact 72. The first contact 61 and the second contact 62 are a group of upper and lower correspondingly arranged on one side of the moving contact member 5, and the third contact 71 and the fourth contact 72 are a group of upper and lower correspondingly arranged on the other side of the moving contact member 5. It is further preferred that the housing 9 is provided with a first limiting groove 94 that forms a limiting fit with the first connecting plate 11, and the first limiting groove 94 is respectively provided at both ends of the second mounting groove 92, so that the first connecting plate 11 is matched and inserted into the first limiting groove 94; the housing 9 is provided with a second limiting groove 95 that forms a limiting fit with the second connecting plate 21, and the second limiting groove 95 is provided at one end of the contact groove 93 close to the second terminal 2, so that the second connecting plate 21 is matched and inserted into the second limiting groove 95; the housing 9 is provided with a third limiting groove 96 that forms a limiting fit with the third connecting plate 31. The third limiting grooves 96 are respectively provided at both ends of the first mounting groove 91, so that the third connecting plate 31 is matched and penetrated into the second limiting groove 95. This structural arrangement, through the first limiting groove 94, the second limiting groove 95 and the second limiting groove 95, respectively plays a limiting installation role for the first connecting plate 11, the second connecting plate 21 and the third connecting plate 31 in the shell 9, so as to prevent the first, second and third connecting plates from positional displacement, and has good installation stability.

[0037] like Figure 5 As shown, the shell 9 includes a shell cover 901 and a shell base connected by snaps. The shell cover 901 is provided with a group of first connecting holes 97 corresponding to the position of the electromagnetic mechanism, so that the leads of the coil structure 82 of the electromagnetic mechanism pass through the first connecting holes 97; the shell cover 901 is provided with a group of second connecting holes 98 corresponding to the position of the current transformer 4, so that the leads of the current transformer 4 pass through the second connecting holes 98.

[0038] The magnetic latching relay provided in this embodiment is provided with two groups of normally open contact groups 6 and two groups of normally closed contact groups 7, and is also provided with two movable contact members 5 driven by an electromagnetic mechanism. This arrangement enables the magnetic latching relay to have multiple groups of normally open contacts and multiple groups of normally closed contacts, thereby improving the relay's ability to control multiple electrical circuits.

[0039] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A magnetic latching relay contact structure, comprising a terminal assembly disposed in a housing (9), a movable contact member (5), and a normally closed contact group (7) and a normally open contact group (6) disposed on opposite sides of the movable contact member (5), wherein the movable contact member (5) is driven by an electromagnetic mechanism (8) to contact the normally closed contact group (7) or the normally open contact group (6), and characterized in that: The terminal assembly includes a first terminal (1), a second terminal (2) and a third terminal (3) arranged on the housing (9); the normally open contact group (6) includes a first contact (61) and a second contact (62) electrically connected to the first terminal and the second terminal respectively; the normally closed contact group (7) includes a third contact (71) and a fourth contact (72) electrically connected to the first terminal and the third terminal respectively; the first terminal (1) is connected to the first contact (61) and the third contact (71) respectively through a first connecting plate (11); the first connecting plate (11) is bent to form a U-shaped bending portion (12) passing under the moving contact member (5); the first contact (61) and the third contact (71) are relatively arranged on the side walls of the U-shaped bending portion (12); the moving contact member (5) extends into the U-shaped cavity in the U-shaped bending portion (12) and moves back and forth.

2. The magnetic latching relay contact structure according to claim 1, characterized in that : When the movable contact piece (5) contacts the normally open contact group (6), a normally open circuit is formed through the first terminal (1), the first contact (61), the second contact (62) to the second terminal (2).

3. The magnetic latching relay contact structure according to claim 1, characterized in that : When the movable contact piece (5) contacts the normally closed contact group (7), a normally closed circuit is formed through the first terminal (1), the third contact (71), the fourth contact (72) to the third terminal (3).

4. The magnetic latching relay contact structure according to claim 1, characterized in that : The movable contact member (5) is a bridge-shaped movable contact having two contact parts, one of which is arranged between the first contact (61) and the third contact (71), and the other is arranged between the third contact (71) and the fourth contact (72).

5. The magnetic latching relay contact structure according to any one of claims 1 to 4, characterized in that The housing (9) comprises a first mounting groove (91) for mounting an electromagnetic mechanism and a second mounting groove (92) arranged beside the first mounting groove (91); the electromagnetic mechanism is linked to the moving contact member (5) via a push rod structure (80).

6. The magnetic latching relay contact structure according to claim 5, characterized in that : A current transformer (4) is provided in the second mounting groove (92), and the first connecting plate (11) is extended in the second mounting groove (92) and passes through the current transformer (4), and is used to detect current information on the first connecting plate (11) through the current transformer (4).

7. The magnetic latching relay contact structure according to claim 5, characterized in that : The first terminal (1) and the third terminal (3) are arranged adjacently and spaced apart at one end of the housing (9), and the second terminal (2) and the grounding terminal are arranged adjacently and spaced apart at the other end of the housing (9); the second terminal (2) is connected to the second contact (62) through a second connecting plate (21), and the third terminal (3) is connected to the fourth contact (72) through a third connecting plate (31); a contact slot (93) suitable for accommodating a normally closed contact group (7) and a normally open contact group (6) is provided in the housing (9); the contact slot (93) is located between the second mounting slot (92) and the second terminal (2); the first connecting plate (11) extends through the second mounting slot (92) to the contact slot (93); the second connecting plate (21) extends from one side of the second terminal (2) to the contact slot (93); and the third connecting plate (31) extends through the first mounting slot (91) to the contact slot (93).

8. The magnetic latching relay contact structure according to claim 7, characterized in that : The housing (9) is provided with a first limiting groove (94) that forms a limiting match with the first connecting plate (11), and the first limiting groove (94) is respectively provided at both ends of the second mounting groove (92); The housing (9) is provided with a second limiting groove (95) that forms a limiting fit with the second connecting plate (21); the second limiting groove (95) is provided at one end of the contact groove (93) close to the second terminal (2); The housing (9) is provided with a third limiting groove (96) which forms a limiting match with the third connecting plate (31), and the third limiting groove (96) is respectively provided at both ends of the first installation groove (91).

9. The magnetic latching relay contact structure according to claim 1, characterized in that The housing (9) comprises a housing cover (901) and a housing base connected by snap fastening, wherein the housing cover (901) is provided with a group of first connection holes (97) corresponding to the position of the electromagnetic mechanism (8) and a group of second connection holes (98) corresponding to the position of the current transformer (4).

Images