Magnetic latching relay

Abstract

A magnetic latching relay comprises a base, an electromagnetic system, an armature, a push rod, a magnetic steel part and a main contact assembly, the electromagnetic system, the armature, the push rod, the magnetic steel part and the main contact assembly are installed on the base, the electromagnetic system is connected with the armature, the armature is connected with the push rod, the push rod is connected with the main contact assembly, and the magnetic steel part is arranged beside the main contact assembly. The switch further comprises an auxiliary contact assembly installed on the base, the auxiliary contact assembly comprises an auxiliary movable reed and an auxiliary static reed which are oppositely arranged, the push rod comprises an auxiliary contact push part, and the auxiliary contact push part is matched with the auxiliary movable reed to drive the auxiliary movable reed to make contact with or be separated from the auxiliary static reed. The auxiliary contact assembly further comprises an auxiliary contact protective cover, and the auxiliary movable reed and the auxiliary static reed are arranged in the auxiliary contact protective cover. The auxiliary contact protective cover can protect the auxiliary movable reed and the auxiliary static reed, and improves the contact reliability of the auxiliary contact.

Description

Technical Field

[0001] The utility model relates to the field of electrical technology, in particular to a magnetic latching relay. Background Art

[0002] The magnetic latching relay, a new type of relay developed in recent years, is also a type of automatic switch. Like other electromagnetic relays on the market, 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. Its switching state is triggered by a pulsed electrical signal of a certain width, and its contacts are maintained in the open and closed state by the magnetic force generated by the 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. Normally, 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. A magnetic latching relay uses a pulse signal to activate the relay and maintain its current state. In the event of a circuit fault, the relay's contact state cannot be determined externally.

[0003] In the prior art, auxiliary contacts comprising an auxiliary moving spring and an auxiliary static spring are often provided in a magnetic latching relay. The opening and closing states of the main contacts in the circuit breaker are determined by the opening and closing states of the auxiliary contacts. However, the auxiliary contacts in the prior art lack a protective structure and are easily contaminated by arc erosion from the main contacts during use, thus affecting the connection reliability of the auxiliary contacts. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of the prior art and provide a magnetic latching relay with an auxiliary contact protection cover.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The present application provides a magnetic latching relay, comprising a base, an electromagnetic system, an armature, a push rod, a magnetic steel portion, and a main contact assembly mounted on the base, wherein the electromagnetic system is connected to the armature, the armature is connected to the push rod, the push rod is connected to the main contact assembly, and the magnetic steel portion is placed beside the main contact assembly.

[0007] The auxiliary contact assembly is mounted on the base, wherein the auxiliary contact assembly includes an auxiliary moving spring and an auxiliary static spring arranged opposite to each other, and the push rod includes an auxiliary contact pushing portion, which cooperates with the auxiliary moving spring to drive the auxiliary moving spring to contact or separate from the auxiliary static spring.

[0008] The auxiliary contact assembly further includes an auxiliary contact protective cover, and the auxiliary moving reed and the auxiliary static reed are placed in the auxiliary contact protective cover.

[0009] In one possible implementation, the auxiliary moving reed and the auxiliary static reed are arranged parallel to the height direction of the magnetic latching relay, the upper end of the auxiliary moving reed is provided with an auxiliary moving contact on one side of the auxiliary static reed, and the upper end of the auxiliary static reed is provided with an auxiliary static contact on one side of the auxiliary moving reed. The auxiliary moving contact and the auxiliary static contact are arranged opposite to each other, and the auxiliary moving reed and the auxiliary static reed respectively include a first lead-out portion and a second lead-out portion extending downward, the auxiliary moving reed is higher than the auxiliary static reed, and the raised area forms an auxiliary contact actuated portion, the auxiliary contact pushing portion of the push rod includes a first groove, the first groove is higher than the auxiliary static reed, the auxiliary contact actuated portion is placed in the first groove, and the push rod drives the auxiliary moving reed to move through the first groove.

[0010] In one possible implementation, the auxiliary contact protective cover includes a first mounting structure, and a second mounting structure is provided on the base to cooperate with the first mounting structure; the base is provided with a baffle along the height direction of the magnetic holding relay, and the auxiliary contact protective cover is in the shape of a box with an open side, and a space for accommodating the auxiliary contact assembly is formed in the auxiliary contact protective cover, the auxiliary contact protective cover is connected to the base, and the baffle blocks the opening of the auxiliary contact protective cover, and the baffle and the auxiliary contact protective cover cooperate to wrap the auxiliary moving reed and the auxiliary static reed.

[0011] In a possible implementation, a second groove cooperating with the push rod is formed on a side of the auxiliary contact protection cover, and the auxiliary contact pushing portion of the push rod partially extends into the second groove.

[0012] In one possible implementation, the push rod also includes a main contact pushing portion, which is a plate-like structure. The main contact pushing portion is lower than the auxiliary contact pushing portion, and the main contact pushing portion includes a first mounting hole, a second mounting hole and a third mounting hole. A support arm is protruding from the lower part of the armature, and the main contact assembly includes a moving contact piece, a moving spring piece and a static contact piece. The support arm is placed in the first mounting hole, the bottom end of the moving contact piece is placed in the second mounting hole, and the bottom end of the moving spring piece is placed in the third mounting hole.

[0013] In one possible implementation, the auxiliary contact pushing portion includes a first connecting arm and a second connecting arm, the first connecting arm is connected to the side of the main contact pushing portion and is vertically arranged to extend upward to connect to the second connecting arm, the second connecting arm is horizontally arranged and a driving boss is provided on the side of the second connecting arm away from the main contact pushing portion, the driving boss extends into the auxiliary contact protective cover and is provided with the first groove.

[0014] In one possible implementation, the moving contact piece includes a moving contact piece mounting portion, and the moving spring piece includes a moving spring piece mounting portion that is installed in cooperation with the moving contact piece mounting portion; the moving spring piece includes at least one moving contact; the static contact piece of the main contact assembly is installed on the base, and the static contact piece includes at least one static contact, and the static contact is arranged corresponding to the moving contact.

[0015] In one possible implementation, the moving contact piece and the moving reed piece are provided with protrusions at both ends along the width direction of the magnetic holding relay, and the protrusions are respectively engaged with the edges of the second mounting hole and the third mounting hole of the push rod and are limited by them; the base is provided with strip bosses along the length direction on the inner sides of both sides along the length direction of the magnetic holding relay, and the two sides of the second mounting hole are placed on the strip bosses, and the protrusions of the moving contact piece and the moving reed piece and the strip bosses on the base clamp the push rod along the height direction of the magnetic holding relay.

[0016] In one possible implementation, the electromagnetic system includes a coil, a coil frame, and two yokes. The coil is wound around the coil frame, and the two yokes are respectively installed at two ends of the coil frame.

[0017] In one possible implementation, the coil frame includes a coil bone shaft, which is placed inside the coil frame, and coil bone shaft mounting parts are provided at both ends of the coil bone shaft. The yoke is provided with a yoke mounting part that is installed in cooperation with the coil bone shaft mounting part.

[0018] In one possible implementation, the yoke mounting portion is a hole-shaped structure, and the coil bone shaft mounting portion is a columnar structure. The columnar structure is composed of multiple cylinders with different diameters. The multiple cylinders are stepped from the center of the coil bone shaft mounting portion to the center away from the coil bone shaft mounting portion, and the diameter gradually decreases.

[0019] In one possible implementation, the yoke includes a control part with one end bent toward the coil frame, and the control part has protruding structures on both sides. The base is provided with a first sliding groove that cooperates with the protruding structure of the control part along the height direction of the magnetic holding relay on both sides.

[0020] In a possible implementation, the upper and lower parts of the armature are provided with third grooves that cooperate with the control portion of the yoke, and the control portion is located in the third grooves.

[0021] In one possible implementation, a fifth mounting structure is provided on the armature, and a sixth mounting structure that cooperates with the fifth mounting structure is provided in the middle of the first sliding groove of the base.

[0022] In one possible implementation, the device further includes a shell, which is installed in cooperation with the base, and the electromagnetic system, armature, push rod, magnetic steel part, main contact assembly and auxiliary contact assembly are placed inside the shell; a seventh mounting structure is provided on the shell, and an eighth mounting structure is provided on the base to be installed in cooperation with the seventh mounting structure.

[0023] In one possible implementation, it also includes two groups of magnetic steel parts with opposite magnetic properties located beside the main contact assembly, and the two groups of magnetic steel parts are arranged opposite to each other along the width direction of the magnetic holding relay. The magnetic steel parts include stacked arc-blowing magnetic steel and magnetic isolation plates, and the magnetic isolation plates half-wrap one side of the magnetic isolation plates. Two groups of first baffle walls with a semi-enclosed structure are provided on the base, and the magnetic steel parts are inserted into the first baffle walls. The magnetic steel parts are interference fit with the first baffle walls. After the outer shell is installed on the base, the magnetic isolation plates cooperate with the first baffle walls to wrap the corresponding arc-blowing magnetic steel.

[0024] In one possible implementation, a first sliding groove is provided on the back side of the baffle for installing a yoke of the electromagnetic system.

[0025] Compared with the prior art, the magnetic latching relay provided by the present application is provided with an auxiliary contact assembly on the base, and the opening and closing state of the main contact in the relay is judged by the opening and closing state of the auxiliary contact assembly. The auxiliary contact assembly includes an auxiliary moving spring and an auxiliary static spring arranged relatively to each other, and an auxiliary contact protective cover. The auxiliary moving spring and the auxiliary static spring can be placed in the auxiliary contact protective cover. By providing the auxiliary contact protective cover, the auxiliary moving spring and the auxiliary static spring can be protected, reducing the contamination of the auxiliary moving spring and the auxiliary static spring during use, and improving the contact reliability of the auxiliary contact. Since the smoke caused by the arc erosion generated by the switching of the main contact assembly will affect the connection performance of the auxiliary contact, the provision of the auxiliary contact protective cover can also avoid contamination of the auxiliary contact.

[0026] Furthermore, the auxiliary moving spring and the auxiliary static spring of the present application are arranged in parallel, so that the auxiliary moving spring is higher than the auxiliary static spring, and the raised area forms an auxiliary contact actuated part. At the same time, the present application also includes a pushing rod cooperating with the auxiliary contact assembly, and the auxiliary contact pushing part of the pushing rod includes a first groove, and the first groove is higher than the auxiliary static spring, so that the auxiliary contact actuated part is placed in the first groove. The first groove is driven by the movement of the pushing rod, so that the first groove pushes the auxiliary moving spring and the auxiliary static spring to contact or separate. The outstanding effect of this design is that there is no need to separately set up an auxiliary lead-out piece that extends into the interior of the magnetic latching relay and is connected to the auxiliary moving spring, and the structure is compact, which saves space inside the magnetic latching relay and is more convenient to install.

[0027] Furthermore, unlike the prior art, the auxiliary moving contact and the auxiliary static contact in the present application are respectively arranged at the upper ends of the auxiliary moving spring and the auxiliary static spring, and the first lead-out portion and the second lead-out portion are respectively arranged at the lower ends. The structure is more compact, beautiful and simple, and installation is also more convenient.

[0028] Furthermore, by arranging a baffle on the base, the baffle cooperates with the auxiliary contact protection cover to completely wrap the auxiliary moving spring and the auxiliary static spring, which can play a better protective role.

[0029] Furthermore, by providing a main contact pushing portion on the pushing rod and providing a third groove, a fourth groove and a fifth groove on the main contact pushing portion, the armature, the movable contact piece, the movable spring and the pushing rod are connected as a whole. The movement of the armature drives the movement of the pushing rod, and then drives the movement of the movable contact piece and the movable spring, so that they contact or disconnect with the static contact piece. At the same time, the movement of the pushing rod also drives the movement of the auxiliary contact pushing portion, and then drives the movement of the auxiliary movable spring, so that the auxiliary movable spring contacts or disconnects with the auxiliary static spring, thereby realizing the opening and closing state conversion of the auxiliary contact.

[0030] Furthermore, by arranging protrusions at both ends of the moving contact piece and the moving reed piece along the width direction of the magnetic holding relay, strip bosses are arranged on the inner sides of both sides of the base along the length direction of the magnetic holding relay, so that the protrusions of the moving contact piece and the moving reed piece and the strip bosses on the base clamp the push rod along the height direction of the magnetic holding relay, and the push rod is limited and fixed by them in the height direction of the magnetic holding relay.

[0031] Furthermore, compared with a circular coil bone shaft, the coil formed by a wire of the same length has a square structure, which can increase the space from the yoke to the outer diameter of the coil, so that the armature installed on the yoke has sufficient room to move. In this case, the size from the axis of the coil bone shaft to the yoke can be further shortened, thereby reducing the overall length of the electromagnetic system.

[0032] Furthermore, by relatively arranging two groups of magnetic steel parts with opposite magnetic properties beside the main contact assembly, the magnetic steel parts include stacked arc-blowing magnetic steel and magnetic isolation plates, the magnetic isolation plates half-wrap one side of the magnetic isolation plates, the shell is provided with two groups of first baffle walls with semi-enclosed structures, the base is provided with two groups of second baffle walls with semi-enclosed structures, the first baffle walls and the second baffle walls are correspondingly arranged in the vertical direction of the magnetic holding relay, one end of the magnetic steel part is placed in the first baffle wall, and the other end is placed in the second baffle wall, the two ends of the magnetic steel part are respectively interference fit with the first baffle wall and the second baffle wall, after the shell is installed on the base, the magnetic isolation plates cooperate with the first baffle wall and the second baffle wall to wrap the corresponding arc-blowing magnetic steel. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1a This is a schematic diagram of the structure of the magnetic latching relay of the utility model;

[0034] Figure 1b This is a schematic diagram of the internal structure of the magnetic latching relay of the utility model;

[0035] Figure 1c This is a schematic diagram of the structure of the electromagnetic system, armature, push rod, main contact assembly and auxiliary contact assembly of the magnetic latching relay of the utility model after installation;

[0036] Figure 1d yes Figure 1c The main view;

[0037] Figure 2 This is a structural diagram of the auxiliary contact assembly of the utility model;

[0038] Figure 3 This is a schematic structural diagram of the push rod of the utility model;

[0039] Figure 4 This is a structural diagram of the auxiliary contact protective cover of the utility model;

[0040] Figure 5 It is a structural diagram of the armature of the utility model;

[0041] Figure 6 It is a structural diagram of the main contact assembly of the utility model;

[0042] Figure 7 It is a structural diagram of the base of the utility model;

[0043] Figure 8 It is a structural diagram of the electromagnetic system of the utility model;

[0044] Figure 9 It is a structural diagram of the shell of the utility model;

[0045] In the figure: base 100; electromagnetic system 1; armature 2; push rod 3; magnetic steel part 4; main contact assembly 5; auxiliary contact assembly 6; auxiliary moving spring 61; auxiliary static spring 62; auxiliary contact driven part 63; auxiliary contact pushing part 31; first groove 32; auxiliary moving contact 611; auxiliary static contact 621; first lead part 612; second lead part 622; auxiliary contact protective cover 64; first mounting structure 641; second mounting structure 642; second groove 643; main contact pushing part 33; first Mounting hole 331; second mounting hole 332; third mounting hole 333; support arm 21; moving contact piece 51; moving spring piece 52; moving spring piece mounting portion 521; static contact piece 53; strip boss 334; coil skeleton 11; yoke 12; coil bone shaft 13; coil bone shaft mounting portion 131; yoke mounting portion 121; control portion 122; first slide groove 123; third groove 24; fifth mounting structure 22; sixth mounting structure 23; housing 101; arc blowing magnet 41; magnetic isolation sheet 42; first retaining wall 43. DETAILED DESCRIPTION

[0046] The following embodiments are given in conjunction with the accompanying drawings to further illustrate the specific implementation of the present utility model. The protection scope of the present utility model is not limited to the description of the following embodiments.

[0047] like Figure 1a and Figure 1b As shown, the present application provides a magnetic latching relay, comprising a base 100, and an electromagnetic system 1, an armature 2, a push rod 3, a magnetic steel portion 4, and a main contact assembly 5 mounted on the base 100. The electromagnetic system 1 is connected to the armature 2, the armature 2 is connected to the push rod 3, the push rod 3 is connected to the main contact assembly 5, and the magnetic steel portion 4 is placed next to the main contact assembly 5, wherein: Figure 1a This is a schematic diagram of the structure of the magnetic latching relay of this application. Figure 1b This is a schematic diagram of the internal structure of the magnetic latching relay of this application. Figure 1c The figure shows the structure of the electromagnetic system 1, armature 2, push rod 3, main contact assembly 5 and auxiliary contact assembly 6 of the magnetic latching relay after installation; Figure 1d Shown Figure 1c main view.

[0048] like Figure 1b 、 Figure 2 and Figure 3 As shown, the magnetic latching relay further includes an auxiliary contact assembly 6 mounted on the base 100, the auxiliary contact assembly 6 including an auxiliary moving reed 61 and an auxiliary static reed 62 arranged opposite to each other, the push rod 3 including an auxiliary contact pushing portion 31, the auxiliary contact pushing portion 31 cooperates with the auxiliary moving reed 61 to drive the auxiliary moving reed 61 to contact or separate from the auxiliary static reed 62,

[0049] The auxiliary contact assembly 6 further includes an auxiliary contact protective cover 64 , and the auxiliary movable spring 61 and the auxiliary static spring 62 are placed in the auxiliary contact protective cover 64 .

[0050] The magnetic latching relay provided in the present application is provided with an auxiliary contact assembly 6 on the base 100, and the opening and closing state of the main contact in the relay is judged by the opening and closing state of the auxiliary contact assembly 6. The auxiliary contact assembly 6 includes an auxiliary moving spring 61 and an auxiliary static spring 62 arranged relatively to each other, and an auxiliary contact protective cover 64. The auxiliary moving spring 61 and the auxiliary static spring 62 can be placed in the auxiliary contact protective cover 64. By providing the auxiliary contact protective cover 64, the auxiliary moving spring 61 and the auxiliary static spring 62 can be protected, thereby reducing the contamination of the auxiliary moving spring 61 and the auxiliary static spring 62 during use, and improving the contact reliability of the auxiliary contact. Since the smoke caused by the arc erosion generated by the switching of the main contact assembly 5 will affect the connection performance of the auxiliary contact, the provision of the auxiliary contact protective cover 64 can also avoid contamination of the auxiliary contact.

[0051] Preferably, Figure 1b 、 Figure 2 and Figure 3 As shown, the auxiliary movable spring 61 and the auxiliary static spring 62 are arranged parallel to the height direction of the magnetic latching relay. The auxiliary movable spring 61 is higher than the auxiliary static spring 62, and the raised area forms an auxiliary contact actuated portion 63. The push rod 3 includes an auxiliary contact pushing portion 31, and the auxiliary contact pushing portion 31 includes a first groove 32. The first groove 32 is higher than the auxiliary static spring 62. The auxiliary contact actuated portion 63 is placed in the first groove 32. The push rod 3 drives the auxiliary movable spring 61 to move through the first groove 32, so that the auxiliary movable spring 61 contacts or separates from the auxiliary static spring 62.

[0052] The auxiliary moving spring 61 of the present application is arranged in parallel with the auxiliary static spring 62, so that the auxiliary moving spring 61 is higher than the auxiliary static spring 62, and the raised area forms an auxiliary contact actuated portion 63. At the same time, the present application also includes a push rod 3 cooperating with the auxiliary contact assembly 6, and the auxiliary contact pushing portion 31 of the push rod 3 includes a first groove 32, and the first groove 32 is higher than the auxiliary static spring 62, so that the auxiliary contact actuated portion 63 is placed in the first groove 32. The first groove 32 is driven by the movement of the push rod 3, so that the first groove 32 pushes the auxiliary moving spring 61 and the auxiliary static spring 62 to contact or separate. The outstanding effect of this design is that there is no need to separately set an auxiliary lead-out piece that extends into the interior of the magnetic latching relay and is connected to the auxiliary moving spring 61, and the structure is compact, which saves space inside the magnetic latching relay and is more convenient to install.

[0053] Preferably, Figure 2As shown, the auxiliary dynamic spring 61 and the auxiliary static spring 62 respectively include a first lead-out portion 612 and a second lead-out portion 622 extending downward.

[0054] The first lead-out portion 612 and the second lead-out portion 622 are preferably rod-shaped structures for external connection leads. The first lead-out portion 612 and the second lead-out portion 622 can be connected to the central control panel. When the magnetic holding relay receives an action signal, the coil is powered on and is in an action state, the auxiliary moving reed 61 contacts the auxiliary static reed 62, and the auxiliary contact is in a closed state. At this time, the signal will be transmitted to the central control panel. The central control panel can display the word "1" or "closed" to remind the staff that the magnetic holding relay is in a working closed state. When the central control panel displays the word "0" or "open", it means that the auxiliary contact is in an open state, the magnetic holding relay is not working and is in a disconnected state, there may be a fault problem, and the electrical equipment needs to be checked. In other embodiments, the first lead-out portion 612 and the second lead-out portion 622 may also be a plate-like structure, and the first lead-out portion 612 and the second lead-out portion 622 may be extensions of the auxiliary movable spring piece 61 and the auxiliary static spring piece 62, respectively. This saves the time of making the first lead-out portion 612 and the second lead-out portion 622 on the auxiliary movable spring piece 61 and the auxiliary static spring piece 62, thereby improving production efficiency.

[0055] Further, such as Figure 2 As shown, an auxiliary moving contact 611 is provided at the upper end of the auxiliary moving spring 61, facing one side of the auxiliary static spring 62. An auxiliary static contact 621 is provided at the upper end of the auxiliary static spring 62, facing one side of the auxiliary moving spring 61. The auxiliary moving contact 611 and the auxiliary static contact 621 are arranged opposite each other. The auxiliary moving contact 611 and the auxiliary static contact 621 are collectively referred to as auxiliary contacts. The auxiliary contacts have two states: open and closed. When the auxiliary moving contact 611 and the auxiliary static contact 621 are disconnected, the auxiliary contact is in the open state. When the auxiliary static contact 621 and the auxiliary moving contact 611 are in contact, the auxiliary contact is in the closed state. The auxiliary moving spring 61 and the auxiliary static spring 62 can be plate-shaped or rod-shaped, and are preferably made of copper. Materials such as steel and copper-based alloys (such as tin-phosphor bronze and beryllium bronze) are also possible but not limited to these. The auxiliary moving contact 611 and the auxiliary static contact 621 described in this application are respectively arranged at the upper ends of the auxiliary moving spring piece 61 and the auxiliary static spring piece 62, and the first lead-out portion 612 and the second lead-out portion 622 are respectively provided at the lower ends. The structure is more compact, beautiful and simple, and the installation is also more convenient.

[0056] Further, such as Figure 1b 、 Figure 2 and Figure 4As shown, the auxiliary contact shield 64 includes a first mounting structure 641, and a second mounting structure 642 is provided on the base 100 for cooperating with the first mounting structure 641. In other preferred embodiments, the second mounting structure 642 can be provided on the auxiliary movable spring 61 and the auxiliary static spring 62; or a third mounting structure can be provided on the auxiliary movable spring 61 and the auxiliary static spring 62, and the auxiliary contact shield 64 also includes a fourth mounting structure for cooperating with the third mounting structure. The combination of the first mounting structure 641 and the second mounting structure 642, and the third mounting structure and the fourth mounting structure, ensures a more secure and stable installation of the auxiliary contact shield 64. The first mounting structure 641 can be a slide rail on the inner edge of the auxiliary contact shield 64, and the second mounting structure 642 can be a slide groove provided on the base 100. The slide rail extends into the slide groove, allowing the auxiliary contact shield 64 to be slidably mounted on the base 100.

[0057] Further, such as Figure 7 As shown, the base 100 is provided with a baffle 65 along the height direction of the magnetic latching relay. The auxiliary contact shield 64 is in the shape of a box with one side open. A space is formed in the auxiliary contact shield 64 to accommodate the auxiliary contact assembly 6. The auxiliary contact shield 64 is connected to the base 100, and the baffle 65 blocks the opening of the auxiliary contact shield 64. The baffle 65 and the auxiliary contact shield 64 cooperate to wrap the auxiliary dynamic spring 61 and the auxiliary static spring 62. The wrapping structural design provides better protection for the auxiliary dynamic spring 61 and the auxiliary static spring 62. Preferably, the back of the baffle 65 is provided with a first slide groove 123 for installing the yoke 12. That is, the baffle 65 serves to install the yoke 12 and protect the auxiliary contact assembly 6 at the same time.

[0058] Further, such as Figure 2 and Figure 4 As shown, a second groove 643 cooperating with the push rod 3 is formed on the side of the auxiliary contact protection cover 64 , and the auxiliary contact pushing portion 31 of the push rod 3 partially extends into the second groove 643 .

[0059] Specifically, a second groove 643 is defined on one side of the auxiliary contact shield 64. One side of the auxiliary contact push portion 31 of the push rod 3's rod-shaped structure can be positioned within the second groove 643. As the push rod 3 moves, the auxiliary contact push portion 31 can move within the second groove 643. The auxiliary contact push portion 31 is a bent "L"-shaped structure. The auxiliary contact push portion 31 includes a first connecting arm and a second connecting arm. The first connecting arm is connected to a side of the main contact push portion 33 and extends vertically upward to connect to the second connecting arm. The second connecting arm is horizontally disposed and has a drive boss on the side of the second connecting arm away from the main contact push portion 33. The drive boss extends into the auxiliary contact shield 64 and is defined by the first groove 32.

[0060] Preferably, Figure 3 As shown, the push rod 3 further includes a main contact pushing portion 33 , which is a plate-shaped structure. The main contact pushing portion 33 is lower than the auxiliary contact pushing portion 31 in the height direction of the magnetic latching relay.

[0061] One end of the auxiliary contact pushing portion 31 is bent and connected to a corner of the main contact pushing portion 33 to form a "Z" shape, so that one side of the "L"-shaped structure of the auxiliary contact pushing portion 31 is parallel to the main contact pushing portion 33.

[0062] Further, such as Figure 1c 、 Figure 3 、 Figure 5 and Figure 6 As shown, the main contact pusher 33 includes a first mounting hole 331, a second mounting hole 332, and a third mounting hole 333. The arm 21 protrudes from the lower portion of the armature 2. The main contact assembly 5 includes a movable contact piece 51, a movable spring piece 52, and a stationary contact piece 53. The arm 21 is positioned within the first mounting hole 331, the bottom end of the movable contact piece 51 is positioned within the second mounting hole 332, and the bottom end of the movable spring piece 52 is positioned within the third mounting hole 333. In other embodiments, the first mounting hole 331, the second mounting hole 332, and the third mounting hole 333 may also be groove structures.

[0063] By providing a main contact pushing portion 33 on the pushing rod 3, and providing a first mounting hole 331, a second mounting hole 332 and a third mounting hole 333 on the main contact pushing portion 33, the armature 2, the movable contact piece 51, the movable spring piece 52 and the pushing rod 3 are connected as a whole. The movement of the armature 2 drives the pushing rod 3 to move, and then drives the movable contact piece 51 and the movable spring piece 52 to move, so that they contact or disconnect with the static contact piece 53. At the same time, the movement of the pushing rod 3 also drives the auxiliary contact pushing portion 31 to move, and then drives the auxiliary movable spring piece 61 to move, so that the auxiliary movable spring piece 61 contacts or disconnects with the auxiliary static spring piece 62, thereby realizing the opening and closing state conversion of the auxiliary contact.

[0064] Further, such as Figure 6 As shown, the movable contact piece 51 includes a movable contact piece mounting portion, and the movable spring piece 52 includes a movable spring piece mounting portion 521 that cooperates with the movable contact piece mounting portion. The movable spring piece 52 includes at least one movable contact point. The stationary contact piece 53 of the main contact assembly 5 is mounted on the base 100. The stationary contact piece 53 includes at least one stationary contact point, which is arranged corresponding to the movable contact point. The movable contact piece mounting portion can be a hole-shaped structure, and the movable spring piece mounting portion 521 can be a rivet, and the hole-shaped structure and the rivet cooperate to achieve riveting, or it can be a screw and nut cooperate, both of which can enable the movable spring piece 52 to be mounted on the movable contact piece 51.

[0065] Further, such as Figure 1c 、 Figure 6 and Figure 7 As shown, the moving contact piece 51 and the moving reed piece 52 are provided with protrusions at both ends along the width direction of the magnetic latching relay, and the protrusions are respectively engaged with the edges of the second mounting hole 332 and the third mounting hole 333 of the push rod 3 and are limited by them; the base 100 is provided with strip bosses 334 along the length direction on the inner sides of both sides along the length direction of the magnetic latching relay, and both sides of the second mounting hole 332 are placed on the strip bosses 334. The protrusions of the moving contact piece 51 and the moving reed piece 52 and the strip bosses 334 on the base 100 clamp the push rod 3 along the height direction of the magnetic latching relay, so that the push rod 3 is limited and fixed in the height direction of the magnetic latching relay.

[0066] Preferably, Figure 8 As shown, the electromagnetic system 1 includes a coil, a coil frame 11 and two yokes 12 . The coil is wound around the coil frame 11 , and the two yokes 12 are respectively installed at both ends of the coil frame 11 .

[0067] Furthermore, the coil frame 11 includes a coil bone shaft 13, which is placed inside the coil frame 11. Coil bone shaft mounting portions 131 are provided at both ends of the coil bone shaft 13, and a yoke mounting portion 121 is provided on the yoke 12 to cooperate with the coil bone shaft mounting portion 131.

[0068] Specifically, the yoke 12 is a plate-like structure, the coil bone shaft 13 is a square structure, the coil bone shaft mounting portion 131 is a columnar structure, the yoke mounting portion 121 is a hole-like structure, or the yoke mounting portion 121 is a columnar structure raised on the surface of the yoke 12, the coil bone shaft mounting portion 131 is a hole-like structure, and the installation of the coil bone shaft mounting portion 131 and the yoke mounting portion 121 presents a mortise and tenon structure. In order to achieve a better installation effect, the columnar structure of the coil bone shaft mounting portion 131 can be composed of multiple cylindrical structures with different diameters. The multiple cylinders are stepped from the center close to the coil bone shaft mounting portion 131 to the center away from the coil bone shaft mounting portion 131, and the diameter gradually decreases. Compared with the circular coil bone shaft 13, the coil is surrounded by wires of the same length. The coil bone shaft 13 has a square structural design, which can increase the space from the yoke 12 to the outer diameter of the coil, so that the armature 2 installed on the yoke 12 has sufficient room to move. In this case, the size from the axis of the coil bone shaft 13 to the yoke 2 can be further shortened, thereby reducing the overall length of the electromagnetic system 1.

[0069] Further, such as Figure 7 and Figure 8 As shown, the yoke 12 includes a control portion 122 with one end bent toward the coil bobbin 11. The control portion 122 has protruding structures on both sides. First sliding grooves 123 are provided on both sides of the base 100 along the height direction of the magnetic latching relay, which cooperate with the protruding structures of the control portion 122. The yoke 12 can be restrained by the first sliding grooves 123 through the cooperation between the protruding structures and the first sliding grooves 123. The base 100 does not need to be provided with a separate baffle 65. The auxiliary contact shield 64 can cooperate with the back of the first sliding grooves 123 to cover the auxiliary dynamic spring 61 and the auxiliary static spring 62.

[0070] Further, such as Figure 5 and Figure 8 As shown, the upper and lower parts of the armature 2 are provided with a third groove 24 that cooperates with the control part 122 of the yoke 12. The control part 122 is located in the third groove 24. The third groove 24 can be formed by respectively providing two strip-shaped bosses on the upper and lower surfaces of the armature 2. The two strip-shaped bosses are spaced apart to form the third groove 24. Through the cooperation between the control part 122 and the third groove 24, the electromagnetic system 1 drives the armature 2 to rotate.

[0071] Further, such as Figure 5 and Figure 7 As shown, a fifth mounting structure 22 is provided on the armature 2 , and a sixth mounting structure 23 is provided in the middle of the first sliding groove 123 of the base 100 to cooperate with the fifth mounting structure 22 .

[0072] Specifically, the fifth mounting structure 22 is a mounting shaft in the middle of both sides of the armature 2, and the sixth mounting structure 23 is a mounting hole, which is installed through the shaft hole so that the armature 2 can be rotatably installed on the base 100, or the fifth mounting structure 22 can also be a mounting hole opened on the armature 2, and the sixth mounting structure 23 is a protrusion arranged in the middle of the first slide groove 123, all of which fall within the scope of protection of this application.

[0073] Preferably, Figure 1b and Figure 9 As shown, the magnetic latching relay of the present application also includes a housing 101, which is installed in conjunction with the base 100. The electromagnetic system 1, armature 2, push rod 3, magnetic steel part 4, main contact assembly 5 and auxiliary contact assembly 6 are placed inside the housing 101 and are wrapped by it; a seventh mounting structure is provided on the housing 101, and an eighth mounting structure is provided on the base 100 to be installed in conjunction with the seventh mounting structure. Through the cooperation of the seventh mounting structure and the eighth mounting structure, the housing 101 and the base 100 are fixedly installed.

[0074] Furthermore, the seventh mounting structure includes a protruding portion of a snap-fit structure, and the eighth mounting structure includes a recessed portion of a snap-fit structure. The protruding portion cooperates with the recessed portion to enable the shell 101 and the base 100 to be snap-fitted. The installation is simple and the disassembly is convenient. There is no need to set up separate mounting parts, which reduces the process steps. The seventh mounting structure and the eighth mounting structure are interchangeable, that is, the seventh mounting structure is a recessed portion, and the eighth mounting structure is a protruding portion; or in other preferred embodiments, the shell 101 includes both a protruding portion and a recessed portion, and the base 100 is provided with corresponding recessed portions and protruding portions to achieve snap-fit installation, so that the structure is more firmly installed.

[0075] Furthermore, the seventh mounting structure is a raised portion provided on the edges of the housing 101 , and the eighth mounting structure is a recessed portion provided on the edges of the base 100 and matched with the raised portion.

[0076] Furthermore, the outer edge of the base 100 is a groove, and the edge of the shell 101 can be placed in the groove, so that the installation sealing performance of the shell 101 and the base 100 is better.

[0077] In addition, the inner surface of the shell 101 also includes multiple limiting structures, and the multiple limiting structures correspond to the internal structures on the base 100, so that the shell 101 fixes and limits the multiple components in the base 100 to prevent the components from shaking or falling off during use, affecting the electrical life of the magnetic holding relay.

[0078] Preferably, Figure 1b As shown, the magnetic holding relay of the present application also includes two groups of magnetic steel parts 4 with opposite magnetic properties located beside the main contact assembly 5, and the two groups of magnetic steel parts 4 are arranged opposite to each other along the width direction of the magnetic holding relay, and the magnetic steel parts 4 include stacked arc-blowing magnetic steels 41 and magnetic isolation plates 42, and the magnetic isolation plates 42 half-wrap one side of the magnetic isolation plates 42. Two groups of first baffle walls 43 with a semi-enclosed structure are provided on the base 100, and the magnetic steel parts 4 are inserted into the first baffle walls 43. The magnetic steel parts 4 are interference fit with the first baffle walls 43. After the shell 101 is installed on the base 100, the magnetic isolation plates 42 cooperate with the first baffle walls 43 to wrap the corresponding arc-blowing magnetic steel 41.

[0079] Furthermore, two groups of first retaining walls 43 may be provided on the base 100, and two groups of second retaining walls may be provided on the shell 101. One first retaining wall 43 and one second retaining wall cooperate to wrap a group of magnetic steel parts 4 along the height direction of the magnetic holding relay. The two ends of the magnetic steel part 4 are respectively inserted into the first retaining wall 43 and the second retaining wall. The two ends of the magnetic steel part 4 are respectively interference fit with the first retaining wall 43 and the second retaining wall. After the shell 101 is installed on the base 100, the magnetic isolation sheet 42 cooperates with the first retaining wall 43 and the second retaining wall to wrap its corresponding arc-blowing magnetic steel 41.

[0080] Furthermore, the first retaining wall 43 and the second retaining wall are integrally formed with the housing 101 and the base 100 respectively.

[0081] In other possible implementations, the magnetic steel portion 4 only includes the arc-blowing magnetic steel 41, and a first retaining wall 43 of a semi-enclosed structure is provided in the outer shell 101, and the first retaining wall 43 and the side wall of the outer shell 101 form an upper slot with an opening facing downward, and the base 100 is provided with a second retaining wall of a semi-enclosed structure, and the second retaining wall and the side wall of the base 100 form a lower slot; the upper end of the arc-blowing magnetic steel 41 is inserted into the upper slot, and the lower end of the arc-blowing magnetic steel 41 is inserted into the lower slot, and the upper slot and the lower slot are correspondingly arranged along the height direction of the magnetic holding relay. After the outer shell 101 is installed on the base 100, the upper slot and the lower slot completely wrap the arc-blowing magnetic steel 41.

[0082] Furthermore, the upper slot and the lower slot can be set separately, and are not surrounded by the first side wall and the side wall of the shell 101, the second side wall and the side wall of the base 100. Such a setting can also achieve the same technical effect.

[0083] Furthermore, in one feasible manner, the base 100 is provided with two groups of lower slots along the width direction of the magnetic holding relay, and the magnetic steel part 4 is inserted therein with interference fit, or, in another feasible manner, the housing 101 is provided with two groups of upper slots along the width direction of the magnetic holding relay, and the magnetic steel part 4 is inserted therein with interference fit, both of which fall within the scope of protection of the present application.

[0084] Furthermore, in other embodiments, two sets of first retaining walls 43 or second retaining walls may be provided only on the base 100 or the housing 101, and the first retaining walls 43 may be provided integrally with the housing 101, or the second retaining walls may be provided integrally with the base 100; or the first retaining wall 43 may be provided on one side of the housing 101, and the second retaining wall may be provided on one side of the base 100, and the first retaining wall 43 and the second retaining wall may be provided opposite to each other along the width direction of the magnetic latching relay.

[0085] When the magnetic latching relay is closed or disconnected, the moving spring 52 in the main contact assembly 5 contacts or disconnects with the static contact 53, generating an arc. The arc burns between the contacts of the switch. To reduce the damage caused by the arc to the contacts, a magnetic arc extinguishing device is generally used. Relying on the effect of the magnetic field, the magnetic field can affect the arc and guide the arc into a special divergent arc angle, thereby lengthening the arc. The movement and lengthening of the arc help cool the arc column and deionize it. In the magnetic latching relay of the present application, a magnetic steel portion 4 with mutually attracting polarities is provided beside the main contact assembly 5. The magnetic field generated by the magnetic steel portion 4 acts on the arc, affecting the movement of the arc.

[0086] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are conventionally placed directions or positional relationships during use. They are intended solely for ease of description and do not imply that the devices or components referred to must have a specific direction. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used solely for distinction and description and should not be construed as indicating relative importance.

[0087] The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and the specific implementation of the present invention cannot be considered to be limited to these descriptions. For those skilled in the art of the present invention, without departing from the concept of the present invention, several simple deductions or substitutions can be made, which should be considered to fall within the scope of protection of the present invention.

Claims

1. A magnetic latching relay, comprising a base (100), an electromagnetic system (1), an armature (2), a push rod (3), a magnetic steel portion (4), and a main contact assembly (5) mounted on the base (100), wherein the electromagnetic system (1) is connected to the armature (2), the armature (2) is connected to the push rod (3), the push rod (3) is connected to the main contact assembly (5), and the magnetic steel portion (4) is placed beside the main contact assembly (5), characterized in that: The auxiliary contact assembly (6) is mounted on the base (100), wherein the auxiliary contact assembly (6) includes an auxiliary movable spring (61) and an auxiliary static spring (62) arranged opposite to each other, and the push rod (3) includes an auxiliary contact pushing portion (31), wherein the auxiliary contact pushing portion (31) cooperates with the auxiliary movable spring (61) to drive the auxiliary movable spring (61) to contact or separate from the auxiliary static spring (62). The auxiliary contact assembly (6) further comprises an auxiliary contact protective cover (64), and the auxiliary movable spring (61) and the auxiliary static spring (62) are placed in the auxiliary contact protective cover (64).

2. The magnetic latching relay according to claim 1, wherein: The auxiliary moving spring (61) and the auxiliary static spring (62) are arranged in parallel along the height direction of the magnetic latching relay. The upper end of the auxiliary moving spring (61) is provided with an auxiliary moving contact (611) on one side relative to the auxiliary static spring (62). The upper end of the auxiliary static spring (62) is provided with an auxiliary static contact (621) on one side relative to the auxiliary moving spring (61). The auxiliary moving contact (611) and the auxiliary static contact (621) are arranged opposite to each other. The auxiliary moving spring (61) and the auxiliary static spring (62) respectively include a downwardly extending The auxiliary movable spring (61) is higher than the auxiliary static spring (62), and the raised area forms an auxiliary contact actuated portion (63). The auxiliary contact pushing portion (31) of the pushing rod (3) includes a first groove (32), the first groove (32) is higher than the auxiliary static spring (62), and the auxiliary contact actuated portion (63) is placed in the first groove (32). The pushing rod (3) drives the auxiliary movable spring (61) to move through the first groove (32).

3. The magnetic latching relay according to claim 1, wherein: The auxiliary contact protective cover (64) includes a first mounting structure (641), and a second mounting structure (642) is provided on the base (100) and is mounted in cooperation with the first mounting structure (641); the base (100) is provided with a baffle (65) along the height direction of the magnetic latching relay, the auxiliary contact protective cover (64) is in the shape of a box with one side open, and a space for accommodating the auxiliary contact assembly (6) is formed in the auxiliary contact protective cover (64), the auxiliary contact protective cover (64) is connected to the base (100), and the baffle (65) blocks the opening of the auxiliary contact protective cover (64), and the baffle (65) cooperates with the auxiliary contact protective cover (64) to wrap the auxiliary moving spring (61) and the auxiliary static spring (62).

4. The magnetic latching relay according to claim 1, wherein: A second groove (643) cooperating with the push rod (3) is provided on the side of the auxiliary contact protection cover (64), and the auxiliary contact pushing portion (31) of the push rod (3) partially extends into the second groove (643).

5. The magnetic latching relay according to claim 2, wherein: The push rod (3) also includes a main contact pushing portion (33), the main contact pushing portion (33) is a plate-shaped structure, and the main contact pushing portion (33) is lower than the auxiliary contact pushing portion (31); the main contact pushing portion (33) includes a first mounting hole (331), a second mounting hole (332) and a third mounting hole (333); a support arm (21) is protruding from the lower part of the armature (2); the main contact assembly (5) includes a moving contact piece (51), a moving spring piece (52) and a stationary contact piece (53); the support arm (21) is placed in the first mounting hole (331), the bottom end of the moving contact piece (51) is placed in the second mounting hole (332), and the bottom end of the moving spring piece (52) is placed in the third mounting hole (333).

6. The magnetic latching relay according to claim 5, wherein: The auxiliary contact pushing portion (31) includes a first connecting arm and a second connecting arm, the first connecting arm being connected to the side of the main contact pushing portion (33) and being vertically arranged to extend upward and be connected to the second connecting arm, the second connecting arm being horizontally arranged and being provided with a driving boss on a side of the second connecting arm away from the main contact pushing portion (33), the driving boss extending into the auxiliary contact protective cover (64) and being provided with the first groove (32).

7. The magnetic latching relay according to claim 5, wherein: The movable contact piece (51) includes a movable contact piece mounting portion, and the movable spring piece (52) includes a movable spring piece mounting portion (521) mounted in cooperation with the movable contact piece mounting portion; the movable spring piece (52) includes at least one movable contact point; the stationary contact piece (53) of the main contact assembly (5) is mounted on a base (100), and the stationary contact piece (53) includes at least one stationary contact point, and the stationary contact point is arranged corresponding to the movable contact point.

8. The magnetic latching relay according to claim 7, wherein: The moving contact piece (51) and the moving reed piece (52) are provided with protrusions at both ends along the width direction of the magnetic holding relay, and the protrusions are respectively engaged with the edges of the second mounting hole (332) and the third mounting hole (333) of the push rod (3) and are limited by them; the base (100) is provided with strip-shaped bosses (334) along the length direction on the inner sides of both sides along the length direction of the magnetic holding relay, and both sides of the second mounting hole (332) are placed on the strip-shaped bosses (334), and the protrusions of the moving contact piece (51) and the moving reed piece (52) and the strip-shaped bosses (334) on the base (100) clamp the push rod (3) along the height direction of the magnetic holding relay.

9. The magnetic latching relay according to claim 1, wherein: The electromagnetic system (1) comprises a coil, a coil frame (11) and two yokes (12); the coil is wound around the coil frame (11); and the two yokes (12) are respectively mounted on both ends of the coil frame (11).

10. The magnetic latching relay according to claim 9, wherein: The coil frame (11) comprises a coil bone shaft (13), the coil bone shaft (13) is placed inside the coil frame (11), both ends of the coil bone shaft (13) are provided with coil bone shaft mounting portions (131), and the yoke (12) is provided with a yoke mounting portion (121) which is mounted in cooperation with the coil bone shaft mounting portion (131).

11. The magnetic latching relay according to claim 10, wherein: The yoke mounting portion (121) is a hole-shaped structure, and the coil bone shaft mounting portion (131) is a columnar structure. The columnar structure is composed of a plurality of cylinders with different diameters, and the plurality of cylinders are stepped from the center close to the coil bone shaft mounting portion (131) to the center away from the coil bone shaft mounting portion (131), and the diameters gradually decrease.

12. The magnetic latching relay according to claim 9, wherein: The yoke (12) includes a control portion (122) with one end bent toward one side of the coil frame (11), and both sides of the control portion (122) are protruding structures. First sliding grooves (123) that cooperate with the protruding structures of the control portion (122) are provided on both sides of the base (100) along the height direction of the magnetic latching relay.

13. The magnetic latching relay according to claim 12, wherein: The upper and lower parts of the armature (2) are provided with third grooves (24) that cooperate with the control part (122) of the yoke (12), and the control part (122) is located in the third grooves (24).

14. The magnetic latching relay according to claim 12, wherein: A fifth mounting structure (22) is provided on the armature (2), and a sixth mounting structure (23) is provided in the middle of the first sliding groove (123) of the base (100) and is mounted in cooperation with the fifth mounting structure (22).

15. The magnetic latching relay according to claim 1, wherein: The invention also includes a shell (101), wherein the shell (101) is mounted in cooperation with the base (100), and the electromagnetic system (1), the armature (2), the push rod (3), the magnetic steel part (4), the main contact assembly (5) and the auxiliary contact assembly (6) are placed inside the shell (101); a seventh mounting structure is provided on the shell (101), and an eighth mounting structure is provided on the base (100) and is mounted in cooperation with the seventh mounting structure.

16. The magnetic latching relay according to claim 15, wherein: The invention also includes two groups of magnetic steel parts (4) with opposite magnetic properties located beside the main contact assembly (5), and the two groups of magnetic steel parts (4) are arranged opposite to each other along the width direction of the magnetic holding relay. The magnetic steel parts (4) include stacked arc-blowing magnetic steel (41) and magnetic isolation plates (42), and the magnetic isolation plates (42) half-wrap one side of the magnetic isolation plates (42). The base (100) is provided with two groups of first baffle walls (43) with a semi-enclosed structure, and the magnetic steel parts (4) are inserted into the first baffle walls (43). The magnetic steel parts (4) and the first baffle walls (43) are interference-fitted. After the shell (101) is installed on the base (100), the magnetic isolation plates (42) cooperate with the first baffle walls (43) to wrap the corresponding arc-blowing magnetic steel (41).

17. The magnetic latching relay according to claim 3, wherein: A first sliding groove (123) is provided on the back of the baffle (65) for mounting the yoke (12) of the electromagnetic system (1).

Images