A miniaturized magnetic latching relay with double changeover switch

Abstract

The application discloses a miniaturized magnetic latching relay with double conversion switches, comprising a base, a magnetic circuit part, a main contact part, an auxiliary contact part, a main push block and an auxiliary push block; the magnetic circuit part and the main contact part are arranged in an up-down mode, wherein the armature in the magnetic circuit part is arranged along the axial direction of the coil and presents a cantilevered plate type action above the coil; the main push block and the auxiliary push block are respectively arranged outside the two ends of the coil, the upper ends of the main push block and the auxiliary push block are respectively hung at the two ends of the armature; the lower ends of the main push block and the auxiliary push block are respectively matched with the corresponding main contact part and auxiliary contact part in the lower part of the base; the main driving spring in the main contact part is arranged along the length direction of the armature, and the auxiliary driving spring of the auxiliary contact part is arranged along the width direction of the armature. The application can realize the miniaturization of the relay product, and improve the electrical insulation capacity of the contact system of the relay and the anti-falling capacity of the product.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of relays, in particular to a miniaturized magnetic latching relay with double switching. BACKGROUND

[0002] As an electronic control device, the relay is used to control large current by small current, and is widely used in automatic control circuit, and plays a role of automatic adjustment, safety protection and switching in the circuit. The magnetic latching relay is one of the relays, and its feature is that the opening and closing state of the contact is completely dependent on the action of the permanent magnet. When the opening and closing state of the contact needs to be switched, only a pulse electrical signal of a certain width needs to be applied to the coil to complete the switching, and then the permanent magnet keeps the state of the contact.

[0003] In the field of power supply application, the magnetic latching relay is a low-energy device, and is widely used in power management modules. With the urgent demand for the reliability and self-protection of the circuit, a magnetic latching relay with two switching switches is usually selected, the main switch is responsible for opening and closing the main load circuit, and the auxiliary switch is responsible for diagnosing the contact state of the main load circuit. When the main contact part is abnormal, the auxiliary contact system can judge the opening or closing state of the main contact, and feed back the signal, and the device can take corresponding action according to the signal to protect the safe operation of the device.

[0004] In the prior art magnetic latching relay with double switching, in one case, the moving spring of the auxiliary contact part is fixed on the armature support, and this structure of the magnetic latching relay causes the magnetic circuit part and the auxiliary contact part to have a small electrical insulation distance, so that the application range of the auxiliary contact part is limited. In another case, the main contact part and the auxiliary contact part are driven by the pushing blocks arranged on both sides of the relay, and the main contact part and the auxiliary contact part are designed in the lower part of the base in sequence. Although this relay can improve the electrical insulation capability of the contact system and the magnetic circuit system, and can realize the narrow width of the relay, the disadvantage is that since the two switching switches are arranged in the lower cavity of the base, the low height and miniaturization design of the relay cannot be realized. Therefore, the magnetic latching relay with two switching switches in the prior art cannot achieve both high electrical strength and small size, and the demand for small size and high electrical strength of the magnetic latching relay with double switching is very urgent in the market. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art, and provides a miniaturized magnetic latching relay with double switching. Through structural improvement, the miniaturization of the relay product can be realized, and the electrical insulation capability of the contact system of the relay and the drop resistance of the product can be improved.

[0006] The technical solution adopted by the present invention to solve the technical problem is: a miniaturized magnetic latching relay with a double-changeover switch, comprising a base, a magnetic circuit part, a main contact part, an auxiliary contact part, a main push block and an auxiliary push block; the magnetic circuit part, the main contact part and the auxiliary contact part are respectively installed in the base, and the magnetic circuit part and the main contact part are distributed up and down, wherein the axis of the coil in the magnetic circuit part is arranged in a horizontal direction, the armature in the magnetic circuit part is arranged along the axis of the coil and moves in a seesaw-like manner above the coil; the length of the armature exceeds out of the two ends of the coil, the main pushing block and the auxiliary pushing block are respectively outside the two ends of the coil, and the upper ends of the main pushing block and the auxiliary pushing block are respectively hung on the two ends of the armature; the lower ends of the main pushing block and the auxiliary pushing block are respectively matched with the corresponding main contact part and auxiliary contact part at the lower part of the base; the auxiliary contact part is arranged below the end outside one end of the coil corresponding to the auxiliary pushing block, the active spring in the main contact part is distributed along the length direction of the armature, and the auxiliary moving spring of the auxiliary contact part is distributed along the width direction of the armature.

[0007] The base is provided with a first retaining wall for isolating the magnetic circuit part and the main contact part, so as to utilize the first retaining wall to isolate the upper cavity and the lower cavity in the base; the magnetic circuit part is mounted on the first retaining wall, and the position of the armature of the magnetic circuit part is higher than the base.

[0008] The base is also provided with a second retaining wall for isolating the coil of the magnetic circuit part from the main pushing block, and a third retaining wall for isolating the coil of the magnetic circuit part from the auxiliary pushing block, so as to utilize the second retaining wall and the third retaining wall to isolate a first side cavity and a second side cavity in the base, and the bottom of the first side cavity is connected to the lower cavity.

[0009] The two ends of the armature are respectively provided with an I-shaped slot, and the upper ends of the main push block and the auxiliary push block are respectively provided with a notch-shaped slot; the notch-shaped slots at the upper ends of the main push block and the auxiliary push block are respectively twisted and matched with the I-shaped slots at the two ends of the armature, so that the upper ends of the main push block and the auxiliary push block are respectively hung at the two ends of the armature.

[0010] The active spring in the main contact part is composed of a first spring and a second spring stacked together, one end of the first spring and the second spring stacked together is set as a root, and the other end is set as a moving contact fixing part; the first spring and the second spring are respectively provided with small protrusions protruding outward at the ends of the other ends; the lower end of the main pushing block is provided with a convex groove, and the small protrusions of the first spring and the second spring are respectively fitted in the convex grooves of the main pushing block.

[0011] In the stacked first and second reeds, the second reed is arranged on the top and the first reed is arranged on the bottom, and the small protrusions of the first reed and the small protrusions of the second reed are also in a stacked position; the width of the small protrusion of the first reed is A, the width of the small protrusion of the second reed is B, and they satisfy the following relationship: B<A1<A<B1, wherein the width of the top surface of the convex groove is A1, and the width of the step surface in the middle of the convex groove is B1.

[0012] The end of the small protrusion of the first spring is also provided with a bent portion bent downward at 45° to 90°, and the bent portion is hooked outside the convex groove of the main pushing block; a U-shaped bent portion is also provided in the middle of the first spring.

[0013] The auxiliary movable spring is L-shaped, and the horizontal side of the L-shape of the auxiliary movable spring is distributed along a direction perpendicular to the axis of the coil, and the vertical side of the L-shape is installed in the base; the free end of the horizontal side of the L-shape of the auxiliary movable spring is set as an auxiliary movable contact fixing part, and a square through groove is provided in the horizontal side of the L-shape of the auxiliary movable spring corresponding to the inner section of the auxiliary movable contact fixing part, and the lower end of the auxiliary pushing block is provided with a step and a hook head; the hook head at the lower end of the auxiliary pushing block passes through the square through groove of the auxiliary movable spring and hooks under the horizontal side of the auxiliary movable spring, and the step of the auxiliary pushing block is limited above the horizontal side of the auxiliary movable spring.

[0014] The magnetic circuit part also includes an iron core, left and right yokes and an armature rotating block combination containing the armature; the coil includes a coil frame and an enameled wire wound on the coil frame; the iron core is installed in the iron core mounting hole of the coil frame, and the left and right yokes are respectively fixed to the two ends of the iron core outside the two ends of the coil frame; a protrusion is also provided in the middle of the coil frame, and the armature rotating block combination is provided with a central rotating shaft, and the central rotating shaft of the armature rotating block combination is installed in the protrusion of the coil frame, so that the two ends of the armature of the armature rotating block combination can be adapted to the left and right yokes, thereby realizing a seesaw-like action.

[0015] The armature rotating block combination includes the armature and a rotating block made of plastic material; the rotating block is installed in the middle of the armature, and the central rotating shaft is provided on the rotating block; the rotating block is in an inverted U-shape, and the central rotating shaft is provided at the two side walls of the inverted U-shape of the rotating block; the inverted U-shaped top wall of the rotating block is also provided with an extension plate, and a through hole is provided in the middle of the extended flat plate of the rotating block, and a square oblique convex bud is provided in the middle of the armature corresponding to the through hole of the extended flat plate, and the rotating block is assembled on the armature and the through hole of the rotating block is engaged with the square oblique convex bud of the armature.

[0016] The magnetic circuit part also includes a magnet, and the protruding part of the coil frame is provided with a magnet mounting hole, which is connected to the iron core mounting hole; the magnet is installed in the magnet mounting hole and contacts the iron core in the iron core mounting hole; a convex tip is provided in the middle of the bottom surface of the armature, which is supported by the magnet; the convex tip is coaxially distributed with the central rotating shaft.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. The present invention employs a configuration in which the magnetic circuit and main contact portions are arranged vertically, the axis of the coil in the magnetic circuit portion is arranged horizontally, and the armature in the magnetic circuit portion is arranged along the axis of the coil and moves in a seesaw-like manner above the coil. The armature extends beyond the ends of the coil at both ends, and the main and auxiliary pusher blocks are positioned outside the ends of the coil, with their upper ends suspended from the ends of the armature. The lower ends of the main and auxiliary pusher blocks engage with the corresponding main and auxiliary contact portions at the bottom of the base, respectively. The auxiliary contact portion is positioned below and outside one end of the coil corresponding to the auxiliary pusher block. The active spring in the main contact portion is arranged along the length of the armature, while the auxiliary active spring in the auxiliary contact portion is arranged along the width of the armature. This structure of the present invention utilizes two pusher blocks for power transmission, while the main and auxiliary contact portions are arranged vertically. This structure not only achieves product miniaturization but also improves the electrical insulation and drop resistance of the contact portion.

[0019] 2. The present invention adopts the method of distributing the magnetic circuit part and the main contact part in an upper and lower manner, the axis of the coil in the magnetic circuit part is arranged in a horizontal direction, the armature in the magnetic circuit part is arranged along the axis of the coil and moves in a seesaw-like manner above the coil; the two ends of the length of the armature respectively exceed the two ends of the coil, the main push block and the auxiliary push block are respectively outside the two ends of the coil, and the upper ends of the main push block and the auxiliary push block are respectively suspended at the two ends of the armature; the lower ends of the main push block and the auxiliary push block respectively cooperate with the corresponding main contact part and auxiliary contact part at the lower part of the base. This structure of the present invention adopts the method of symmetrically and vertically distributing the main push block and the auxiliary push block on both sides of the coil. This structure can achieve the balance of the holding force of the magnetic holding relay in the setting and reset states, making the product performance more stable, and can also reduce the operating noise of the relay and enhance the customer experience.

[0020] 3. The present invention employs a design in which the active reed in the main contact portion is composed of a first reed and a second reed stacked together, with small protrusions extending outward from the distal ends of the first and second reeds, respectively. The lower end of the main push block is provided with a convex groove, and the small protrusions of the first and second reeds fit into the convex grooves of the main push block. This structure of the present invention ensures that the reed reaction force remains constant at the beginning of the main push block's stroke, but increases at the end. This increases the pressure between the moving and static contacts, and simultaneously creates a shifting effect during contact between the moving and static contacts. This ensures reliable operation of the relay within the normal coil excitation voltage range and enables reliable connection and rapid disconnection of the contacts, thereby significantly improving the reliability of the relay.

[0021] 4. The present invention utilizes a free end portion of the L-shaped horizontal side of the auxiliary movable spring as the auxiliary movable contact fixing portion, a square through-slot is provided in the L-shaped horizontal side of the auxiliary movable spring corresponding to the inner section of the auxiliary movable contact fixing portion, and a step and a hook are provided at the lower end of the auxiliary push block. The hook at the lower end of the auxiliary push block passes through the square through-slot of the auxiliary movable spring and hooks under the horizontal side of the auxiliary movable spring, while the step of the auxiliary push block is positioned above the horizontal side of the auxiliary movable spring. This structure has the beneficial effects of a small number of parts, a simple structure, contactless assembly of the auxiliary push block and auxiliary movable spring, reducing assembly debris, and high part assembly efficiency. After assembly, the push block can be positioned in six directions. Combined with the push block head and the armature I-shaped slot, the push block can be positioned in all directions, thereby improving the product's resistance to impact and drops.

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments; however, the miniaturized magnetic latching relay with a dual-changeover switch of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the exploded three-dimensional structure of an embodiment of the present invention;

[0024] Figure 2 is a structural cross-sectional view of an embodiment of the present invention;

[0025] Figure 3 1 is a schematic diagram of a three-dimensional structure of a partial structure (excluding the outer shell) of an embodiment of the present invention;

[0026] Figure 4 It is a front view of a partial structure (with the outer shell removed) of an embodiment of the present invention;

[0027] Figure 5 It is a right side view of a partial structure (with the outer shell removed) of an embodiment of the present invention;

[0028] Figure 6 It is a left side view of a partial structure (with the outer shell removed) of an embodiment of the present invention;

[0029] Figure 7 1 is a schematic diagram of a three-dimensional structure of a partial structure (excluding the housing and the base) of an embodiment of the present invention;

[0030] Figure 8 It is a front view of a partial structure of an embodiment of the present invention (excluding the housing and the base);

[0031] Figure 9 is a schematic diagram of the three-dimensional structure of a base according to an embodiment of the present invention;

[0032] Figure 10 1 is a schematic diagram of the three-dimensional structure of the base of an embodiment of the present invention (flipped at an angle);

[0033] Figure 11 is a front view of a base according to an embodiment of the present invention;

[0034] Figure 12 is a top view of a base according to an embodiment of the present invention;

[0035] Figure 13 is a cross-sectional view of a base according to an embodiment of the present invention;

[0036] Figure 14 1 is a schematic exploded perspective view of the magnetic circuit portion of an embodiment of the present invention;

[0037] Figure 15 1 is a schematic diagram of the three-dimensional structure of the main push block of an embodiment of the present invention;

[0038] Figure 16 This is a front view of the main push block of an embodiment of the present invention;

[0039] Figure 17 1. It is a schematic diagram of the three-dimensional structure of the active spring and the main push block in cooperation with each other according to an embodiment of the present invention;

[0040] Figure 18 This is a front view of the active reed and the main push block in cooperation with each other in an embodiment of the present invention;

[0041] Figure 19 1 is a schematic diagram of the three-dimensional structure of the active reed according to an embodiment of the present invention;

[0042] Figure 20 is a front view of an active reed according to an embodiment of the present invention;

[0043] Figure 21 is a schematic diagram of the three-dimensional structure of the first reed of the active reed according to an embodiment of the present invention;

[0044] Figure 22is a schematic diagram of the three-dimensional structure of the second reed of the active reed according to an embodiment of the present invention;

[0045] Figure 23 is a schematic exploded perspective view of the active spring portion of an embodiment of the present invention;

[0046] Figure 24 is a schematic diagram of the three-dimensional structure of the auxiliary movable spring and the auxiliary pushing block in the state of cooperation according to an embodiment of the present invention;

[0047] Figure 25 is a schematic diagram of the three-dimensional structure of the auxiliary movable spring and the auxiliary pushing block in an unmatched state according to an embodiment of the present invention;

[0048] Figure 26 2. It is a schematic diagram of the three-dimensional structure of the armature rotating block assembly according to an embodiment of the present invention;

[0049] Figure 27 1 is a schematic diagram of the structure of the armature of the armature rotating block assembly according to an embodiment of the present invention;

[0050] Figure 28 Schematic diagram of the structure of the armature of the armature rotating block assembly according to an embodiment of the present invention (flipped at an angle);

[0051] Figure 29 1 is a schematic structural diagram of a rotating block of an armature rotating block assembly according to an embodiment of the present invention;

[0052] Figure 30 1 is a schematic diagram of the structure of the rotating block of the armature rotating block assembly according to an embodiment of the present invention (flipped at an angle);

[0053] Figure 31 Schematic diagram of the relationship between force and displacement during the reset process of an embodiment of the present invention. DETAILED DESCRIPTION

[0054] Example

[0055] See also Figures 1 to 30As shown, a miniaturized magnetic latching relay with a dual-changeover switch of the present invention comprises a housing 10, a base 1, a magnetic circuit portion 2, a main contact portion 3, an auxiliary contact portion 4, a main push block 5, and an auxiliary push block 6; the magnetic circuit portion 2, the main contact portion 3, and the auxiliary contact portion 4 are respectively mounted in the base 1, and the magnetic circuit portion 2 and the main contact portion 3 are arranged in an upper and lower direction, wherein the axis of the coil 21 in the magnetic circuit portion 2 is arranged in a horizontal direction, and the armature 22 in the magnetic circuit portion 2 is arranged along the axis of the coil 21 and moves in a seesaw-like manner above the coil 21; the length of the armature 22 exceeds the coil 21 at both ends. At both ends of the coil 21, the main pushing block 5 and the auxiliary pushing block 6 are respectively located outside the two ends of the coil 21, and the upper ends of the main pushing block 5 and the auxiliary pushing block 6 are respectively hung on the two ends of the armature 22; the lower ends of the main pushing block 5 and the auxiliary pushing block 6 are respectively matched with the corresponding main contact part 3 and auxiliary contact part 4 at the lower part of the base 1; the auxiliary contact part 4 is provided below the outside of one end of the coil 21 corresponding to the auxiliary pushing block 6, the active spring 31 in the main contact part 3 is distributed along the length direction of the armature 22, and the auxiliary moving spring 41 of the auxiliary contact part 4 is distributed along the width direction of the armature 22.

[0056] In this embodiment, Figures 9 to 13 As shown, the base 1 is provided with a first retaining wall 11 for isolating the magnetic circuit portion 2 and the main contact portion 3, so as to utilize the first retaining wall 11 to isolate an upper cavity 12 and a lower cavity 13 in the base; the magnetic circuit portion 2 is mounted on the first retaining wall 11, and the position of the armature 22 of the magnetic circuit portion 2 is higher than the base 1.

[0057] In this embodiment, the base 1 is further provided with a second retaining wall 14 for isolating the coil 21 of the magnetic circuit part 2 from the main pushing block 5, and a third retaining wall 15 for isolating the coil 21 of the magnetic circuit part 2 from the auxiliary pushing block 6, so as to utilize the second retaining wall 14 and the third retaining wall 15 to isolate a first side cavity 16 and a second side cavity 17 in the base 1, and the bottom of the first side cavity 16 is connected to the lower cavity.

[0058] In this embodiment, I-shaped slots 221 are respectively provided at both ends of the armature 22, and notch-shaped slots 51 and 61 are respectively provided at the upper ends of the main push block 5 and the auxiliary push block 6; the notch-shaped slots 51 and 61 at the upper ends of the main push block 5 and the auxiliary push block 6 are respectively twisted and matched with the I-shaped slots 221 at both ends of the armature 22, so that the upper ends of the main push block 5 and the auxiliary push block 6 are respectively hung at the two ends of the armature 22.

[0059] In the embodiment, the main contact part 3 comprises a main active spring part 32 and a main passive spring part 33. The main active spring part 32 comprises the main active spring leaf 31, a main active contact 34 and an active spring lead-out leaf 35. The main passive spring part 33 comprises a main passive spring leaf 331 and a main passive contact 332 fixed on the main passive spring leaf 331. The main passive spring leaf 331 and the active spring lead-out leaf 35 are respectively installed in the lower cavity 13 of the base 1. The active spring lead-out leaf 35 is in a substantially L-shaped form. The vertical side 351 of the L-shaped form of the active spring lead-out leaf 35 leads outwards. The end of the horizontal side 352 of the L-shaped form of the active spring lead-out leaf 35 is riveted to the main active spring leaf 31 and fixed, so that the main active contact 34 installed on the main active spring leaf 31 is correspondingly matched with the main passive contact 332 installed on the main passive spring leaf 331. The main active spring leaf 31 is composed of a first spring leaf 311 and a second spring leaf 312 stacked together. The one end of the first spring leaf 311 and the second spring leaf 312 stacked together is provided as a root part and is riveted to the end of the horizontal side 352 of the L-shaped form of the active spring lead-out leaf 35. The other end of the first spring leaf 311 and the second spring leaf 312 stacked together is provided as an active contact fixing part for fixing the main active contact 34. The first spring leaf 311 and the second spring leaf 312 are respectively provided with small tabs at the end of the other end, i.e. the first spring leaf 311 is provided with a small tab 3111 at the end of the other end, and the second spring leaf 312 is provided with a small tab 3121 at the end of the other end. The lower end of the main push block 5 is provided with a convex groove 52, and the small tab 3111 of the first spring leaf 311 and the small tab 3121 of the second spring leaf 312 are respectively matched in the convex groove 52 of the main push block 5.

[0060] In the embodiment, the first spring leaf 311 and the second spring leaf 312 stacked together are arranged with the second spring leaf 312 on top and the first spring leaf 311 on bottom, and the small tab 3111 of the first spring leaf 311 and the small tab 3121 of the second spring leaf 312 are also arranged in a stacked position. The width of the small tab 3111 of the first spring leaf 311 is A, the width of the small tab 3121 of the second spring leaf 312 is B, and the following relationship is satisfied: B

[0061] In the first reed 311, a U-shaped slot 3112 is arranged around the moving contact at a position beside the fixed contact, and the opening of the U shape is arranged at the side of the end of the other end of the first reed 311, so that the end of the other end of the first reed 311 can be separated and deformed relative to the moving contact. The end of the small tab 3111 of the first reed 311 is also provided with a bending part 3113 bent downward by 45° to 90°, which is hooked outside the convex slot 52 of the main push block 5; and the middle of the first reed 311 is also provided with a U-shaped bending part 3114.

[0062] When the main push block 5 moves downward, the stepped surface 522 in the middle of the convex slot 52 of the main push block 5 first contacts the upper surface of the small tab 3111 of the first reed 311, pushes the other end of the first reed 311 and the second reed 312 stacked together, i.e. the end containing the moving contact 34, to move downward, so that the moving and stationary contact gap gradually decreases, the reed reaction force is small in this process, and the part outside the moving contact of the other end of the first reed 311 and the second reed 312 does not change significantly from the initial flat state; when the moving and stationary contacts start to contact, the first reed 311 continues to move downward, and the second reed 312 does not move any more because the moving and stationary contacts have completely contacted, so that the end of the other end of the first reed 311 and the part outside the moving contact of the other end of the second reed 312 gradually separate, i.e. the small tabs 3111 and 3121 of the first reed 311 and the second reed 312 gradually separate, and at the same time, because the main push block 5 continues to move downward, the top surface 521 of the convex slot 52 of the main push block 5 gradually approaches the small tab 3121 of the second reed 312 until they contact, in this stage, the first reed 311 changes the deformation support point of the reed from the head of the moving reed to the contact point, so that the reed reaction force is large; when the main push block 5 continues to move downward, the top surface 521 of the convex slot 52 and the stepped surface 522 in the middle of the convex slot 52 of the main push block 5 simultaneously push the first reed 311 and the second reed 312 to contact and move, compared with the previous stage, the part outside the moving contact of the other end of the second reed 312 also deforms, so that the reaction force in this stage is large again, so that there are three slope sections in the whole stroke, and at the same time, because the end of the second reed 312 is also subjected to the pushing force, the deformation of the reed 312 will twist the moving contact, and the moving and stationary contacts will obviously misalign, which can easily cause the problem of contact sticking for large inrush current, and the contact misalignment of this mode can obviously improve the problem of contact sticking, so that the reliability of the relay is obviously improved.

[0063] In this embodiment, the auxiliary contact portion 4 includes an auxiliary dynamic spring portion 42 and an auxiliary static spring portion 43, the auxiliary dynamic spring portion 42 includes the auxiliary dynamic spring piece 41 and the auxiliary dynamic contact 44; the auxiliary static spring portion 43 includes an auxiliary static spring piece 431 and an auxiliary static contact 432 fixed on the auxiliary static spring piece 431; the auxiliary static spring piece 431 and the auxiliary dynamic spring piece 41 are respectively installed in the second side cavity 17 of the base 1; the auxiliary dynamic spring piece 41 is L-shaped, and the horizontal side 411 of the L-shaped shape of the auxiliary dynamic spring piece 41 is distributed along a direction perpendicular to the axis of the coil 21, and the vertical side 412 of the L-shaped shape is installed on the bottom In the second side cavity 17 of the seat 1; the free end of the L-shaped horizontal side 411 of the auxiliary moving spring 41 is set as an auxiliary moving contact fixing portion for fixing the auxiliary moving contact 44, and a square through groove 413 is provided in the L-shaped horizontal side 411 of the auxiliary moving spring 41 corresponding to the inner section of the auxiliary moving contact fixing portion, and the lower end of the auxiliary pushing block 6 is provided with a step 62 and a hook head 63; the hook head 63 at the lower end of the auxiliary pushing block 6 passes through the square through groove 413 of the auxiliary moving spring 41 and hooks under the horizontal side 411 of the auxiliary moving spring 41, and the step 62 of the auxiliary pushing block 6 is limited above the horizontal side 411 of the auxiliary moving spring 41. When the auxiliary pushing block 6 moves downward, the step 62 of the auxiliary pushing block 6 pushes the end of the horizontal side 411 of the auxiliary moving spring 41 to move downward. When the auxiliary pushing block 6 moves upward, the hook head 63 of the auxiliary pushing block 6 pushes the end of the horizontal side 411 of the auxiliary moving spring 41 to move upward. This matching structure of the auxiliary moving spring 41 and the auxiliary pushing block 6 is simple to assemble. The auxiliary pushing block 6 realizes six-directional (up and down, left and right, front and back) limiting, which can prevent the auxiliary pushing block 6 from escaping from the auxiliary moving spring 41, thereby improving the relay's ability to resist impact and fall.

[0064] In this embodiment, the magnetic circuit part 2 also includes an iron core 23, left and right yokes 24 and an armature rotating block assembly 25 containing the armature 22; the coil 21 includes a coil frame 211 and an enameled wire 212 wound on the coil frame; the iron core 23 is installed in the iron core mounting hole 213 of the coil frame 211, and the left and right yokes 24 are respectively fixed to the two ends of the iron core 23 outside the two ends of the coil frame 21; a protrusion 214 is also provided in the middle of the coil frame 211, and the armature rotating block assembly 25 is provided with a central rotating shaft 251, and the central rotating shaft 251 of the armature rotating block assembly 25 is installed in the protrusion 214 of the coil frame 211, and enables the two ends of the armature 22 of the armature rotating block assembly 25 to adapt to the left and right yokes 24, thereby realizing a seesaw-like action.

[0065] In this embodiment, the armature rotating block assembly 25 includes the armature 22 and a rotating block 26 made of plastic material; the rotating block 26 is installed in the middle of the armature 22, and the central rotating shaft 251 is provided on the rotating block 26; the rotating block 26 is in an inverted U-shape, and the central rotating shaft 251 is provided at the two side walls 261 of the inverted U-shape of the rotating block 26; the inverted U-shaped top wall 262 of the rotating block 26 is also provided with an extended plate 263, and a through hole 264 is provided in the middle of the extended plate 263 of the rotating block 26, and a square oblique convex bud 222 is provided in the middle of the armature 22 corresponding to the through hole of the extension plate, and the rotating block 26 is assembled on the armature 22 and the through hole 264 of the rotating block 26 is engaged with the square oblique convex bud 222 of the armature 22. The present invention realizes the limitation of the armature 22 and the rotating block 26 in six directions by reasonably matching the square oblique convex bract 222 of the armature 22 with the through hole 264 of the rotating block 26, thereby eliminating the conventional fixing method by glue dispensing.

[0066] In this embodiment, the magnetic circuit portion 2 also includes a magnet 27, and the protrusion 214 of the coil frame 211 is provided with a magnet mounting hole 215, and the magnet mounting hole 215 is connected to the iron core mounting hole 213; the magnet 27 is installed in the magnet mounting hole 215 and contacts the iron core 23 in the iron core mounting hole 213; a convex portion 223 is provided in the middle of the bottom surface of the armature 22, and the convex portion 223 is supported by the magnet 27; the convex portion 223 is coaxially distributed with the central rotating shaft 251.

[0067] See also Figure 31As shown in the figure, M1 is the suction force curve during the setting process, M2 is the suction force curve during the reset process, M3 is the reaction force curve of the active spring of the main contact part, M4 is the reaction force curve of the auxiliary spring of the auxiliary contact part, and M5 is the combined reaction force curve of the main and auxiliary springs of the main and auxiliary contact parts. Adding the auxiliary contact part (i.e., the auxiliary switch) can improve the balance of reaction forces: in the reset state, the suction force of the coil voltage excitation and the magnetic force of the permanent magnet are zero (point C), so the armature movement relies on the reaction force of the spring. Without the auxiliary switch, the reaction force value is point A, with a certain degree of reaction force. After adding the auxiliary switch, the reaction force value increases to point B. The larger reaction force value can reduce the armature movement time (improve sensitivity), quickly connect the main contact part contacts, and quickly disconnect the auxiliary contact part contacts, reducing the arc burning time between the contacts and improving contact reliability. In the set state, applying the reset voltage, because the reaction force of the auxiliary spring is relatively small at this time, has little effect on the disconnection of the main contact part contacts. Because the return suction force D is much greater than the reaction force B, it has little effect on the connection of the auxiliary contact portion. Compared to a system with only the main contact portion, the addition of the auxiliary contact portion increases the reaction force in the return state (point B). While the return suction remains unchanged, the combined force of the suction and reaction forces (DA becomes DB) decreases, reducing the impact force between the armature and the yoke in the return state, thereby reducing noise and improving the customer experience. The main function of the coordinated structure of the main push block and the dynamic spring is to improve the reliability of the main contact. Because this structure can increase the reaction force, it also has the effect of increasing the sensitivity of the return action.

[0068] A miniaturized magnetic latching relay with a dual-changeover switch according to the present invention employs a configuration in which a magnetic circuit portion 2 and a main contact portion 3 are arranged vertically. The axis of a coil 21 in the magnetic circuit portion 2 is arranged horizontally. An armature 22 in the magnetic circuit portion 2 is arranged along the axis of the coil 21 and moves in a seesaw-like manner above the coil 21. The armature 22 extends beyond the ends of the coil 21 at both ends. The main push block 5 and the auxiliary push block 6 are respectively located outside the ends of the coil 21. The upper ends of the main push block 5 and the auxiliary push block 6 are respectively suspended from the ends of the armature 22. The lower ends of the main push block 5 and the auxiliary push block 6 respectively engage with the corresponding main contact portion 3 and auxiliary contact portion 4 at the lower portion of the base 1. The auxiliary contact portion 4 is located below and outside one end of the coil 21 corresponding to the auxiliary push block 6. The active spring 31 in the main contact portion 3 is arranged along the length of the armature 22, and the auxiliary active spring 41 of the auxiliary contact portion 4 is arranged along the width of the armature 22. The structure of the present invention uses two pushing blocks for power transmission, and the main contact part and the auxiliary contact part are arranged in a vertical direction. This structure can not only achieve miniaturization of the product, but also improve the electrical insulation capability of the contact part and the product's anti-drop capability.

[0069] The present invention discloses a miniaturized magnetic latching relay with a dual-switch configuration. The magnetic circuit portion 2 and the main contact portion 3 are arranged vertically. The axis of the coil 21 in the magnetic circuit portion 2 is arranged horizontally. The armature 22 in the magnetic circuit portion 2 is arranged along the axis of the coil 21 and moves in a seesaw-like manner above the coil 21. The armature 22 extends beyond the ends of the coil 21 at both ends. The main push block 5 and the auxiliary push block 6 are located outside the ends of the coil 21, and the upper ends of the main push block 5 and the auxiliary push block 6 are suspended from the ends of the armature 22. The lower ends of the main push block 5 and the auxiliary push block 6 respectively engage with the corresponding main contact portion 3 and the auxiliary contact portion 4 at the bottom of the base 1. This structure of the present invention utilizes symmetrical and vertical distribution of the main push block and the auxiliary push block on both sides of the coil. This structure can achieve a balance between the holding force of the magnetic latching relay in the set and reset states, making the product performance more stable, while also reducing the relay's operating noise and improving the customer experience.

[0070] The present invention discloses a miniaturized magnetic latching relay with a dual-switch configuration. The active reed 31 in the main contact portion 3 is designed to be composed of a first reed 311 and a second reed 312 stacked together. The first reed 311 and the second reed 312 each have small protrusions 3111 and 3121 extending outward from their respective ends. The lower end of the main push block 5 is provided with a convex groove 52, and the small protrusions 3111 and 3121 of the first reed 311 and the second reed 312 respectively fit into the convex groove 52 of the main push block 5. This structure of the present invention ensures that the reed reaction force remains constant at the beginning of the main push block's stroke and increases at the end, increasing the pressure between the moving and static contacts and causing a shifting effect during contact. This ensures reliable operation of the relay within the normal coil excitation voltage range and enables reliable connection and rapid disconnection of the contacts, thereby significantly improving the reliability of the relay.

[0071] The present invention discloses a miniaturized magnetic latching relay with a dual-changeover switch. The free end of an L-shaped horizontal side 411 of an auxiliary movable spring 41 serves as an auxiliary movable contact fixing portion. A square through-slot 413 is provided in the L-shaped horizontal side of the auxiliary movable spring, corresponding to the inner portion of the auxiliary movable contact fixing portion. The lower end of the auxiliary pusher 6 is provided with a step 62 and a hook 63. The hook 63 passes through the square through-slot 413 of the auxiliary movable spring 41 and hooks under the horizontal side 411 of the auxiliary movable spring 41. The step 62 of the auxiliary pusher 6 is positioned above the horizontal side 411 of the auxiliary movable spring 41. This structure has the advantages of a small number of parts, a simple structure, contactless assembly of the auxiliary pusher and auxiliary movable spring, reducing assembly debris, and high component assembly efficiency. After assembly, the pusher can be positioned in six directions. The combination of the pusher head and the armature I-shaped slot allows for full positioning of the pusher, improving the product's resistance to impact and drops.

[0072] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent equivalent embodiment. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A miniaturized magnetic latching relay with a dual-changeover switch, comprising a base, a magnetic circuit portion, a main contact portion, an auxiliary contact portion, a main push block, and an auxiliary push block; characterized in that: The magnetic circuit part, main contact part and auxiliary contact part are respectively installed in the base, and the magnetic circuit part and the main contact part are distributed up and down, wherein the axis of the coil in the magnetic circuit part is arranged in a horizontal direction, and the armature in the magnetic circuit part is arranged along the axis direction of the coil and moves in a seesaw-like manner above the coil; the two ends of the length of the armature respectively exceed the two ends of the coil, and the main pushing block and the auxiliary pushing block are respectively outside the two ends of the coil, and the upper ends of the main pushing block and the auxiliary pushing block are respectively hung on the two ends of the armature; the lower ends of the main pushing block and the auxiliary pushing block are respectively matched with the corresponding main contact part and auxiliary contact part at the lower part of the base; the auxiliary contact part is arranged below the end outside one end of the coil corresponding to the auxiliary pushing block, the active spring in the main contact part is distributed along the length direction of the armature, and the auxiliary moving spring of the auxiliary contact part is distributed along the width direction of the armature.

2. The miniaturized magnetic latching relay with a double changeover switch according to claim 1, characterized in that: The base is provided with a first retaining wall for isolating the magnetic circuit part and the main contact part, so as to utilize the first retaining wall to isolate the upper cavity and the lower cavity in the base; the magnetic circuit part is mounted on the first retaining wall, and the position of the armature of the magnetic circuit part is higher than the base.

3. The miniaturized magnetic latching relay with a double changeover switch according to claim 2, characterized in that: The base is also provided with a second retaining wall for isolating the coil of the magnetic circuit part from the main pushing block, and a third retaining wall for isolating the coil of the magnetic circuit part from the auxiliary pushing block, so as to utilize the second retaining wall and the third retaining wall to isolate a first side cavity and a second side cavity in the base, and the bottom of the first side cavity is connected to the lower cavity.

4. The miniaturized magnetic latching relay with a double changeover switch according to claim 1, characterized in that: The two ends of the armature are respectively provided with an I-shaped slot, and the upper ends of the main push block and the auxiliary push block are respectively provided with a notch-shaped slot; the notch-shaped slots at the upper ends of the main push block and the auxiliary push block are respectively twisted and matched with the I-shaped slots at the two ends of the armature, so that the upper ends of the main push block and the auxiliary push block are respectively hung at the two ends of the armature.

5. The miniaturized magnetic latching relay with a double changeover switch according to claim 1, characterized in that: The active spring in the main contact part is composed of a first spring and a second spring stacked together, one end of the first spring and the second spring stacked together is set as a root, and the other end is set as a moving contact fixing part; the first spring and the second spring are respectively provided with small protrusions protruding outward at the ends of the other ends; the lower end of the main pushing block is provided with a convex groove, and the small protrusions of the first spring and the second spring are respectively fitted in the convex grooves of the main pushing block.

6. The miniaturized magnetic latching relay with a double changeover switch according to claim 5, characterized in that: In the stacked first and second reeds, the second reed is arranged on the top and the first reed is arranged on the bottom, and the small protrusions of the first reed and the small protrusions of the second reed are also in a stacked position; the width of the small protrusion of the first reed is A, the width of the small protrusion of the second reed is B, and they satisfy the following relationship: B<A1<A<B1, wherein the width of the top surface of the convex groove is A1, and the width of the step surface in the middle of the convex groove is B1.

7. The miniaturized magnetic latching relay with a double changeover switch according to claim 6, characterized in that: The end of the small protrusion of the first spring is also provided with a bent portion bent downward at 45° to 90°, and the bent portion is hooked outside the convex groove of the main pushing block; a U-shaped bent portion is also provided in the middle of the first spring.

8. The miniaturized magnetic latching relay with a double changeover switch according to claim 1, characterized in that: The auxiliary movable spring is L-shaped, and the horizontal side of the L-shape of the auxiliary movable spring is distributed along a direction perpendicular to the axis of the coil, and the vertical side of the L-shape is installed in the base; the free end of the horizontal side of the L-shape of the auxiliary movable spring is set as an auxiliary movable contact fixing part, and a square through groove is provided in the horizontal side of the L-shape of the auxiliary movable spring corresponding to the inner section of the auxiliary movable contact fixing part, and the lower end of the auxiliary pushing block is provided with a step and a hook head; the hook head at the lower end of the auxiliary pushing block passes through the square through groove of the auxiliary movable spring and hooks under the horizontal side of the auxiliary movable spring, and the step of the auxiliary pushing block is limited above the horizontal side of the auxiliary movable spring.

9. The miniaturized magnetic latching relay with a double changeover switch according to claim 1, characterized in that: The magnetic circuit part also includes an iron core, left and right yokes and an armature rotating block combination containing the armature; the coil includes a coil frame and an enameled wire wound on the coil frame; the iron core is installed in the iron core mounting hole of the coil frame, and the left and right yokes are respectively fixed to the two ends of the iron core outside the two ends of the coil frame; a protrusion is also provided in the middle of the coil frame, and the armature rotating block combination is provided with a central rotating shaft, and the central rotating shaft of the armature rotating block combination is installed in the protrusion of the coil frame, so that the two ends of the armature of the armature rotating block combination can be adapted to the left and right yokes, thereby realizing a seesaw-like action.

10. The miniaturized magnetic latching relay with a double changeover switch according to claim 9, characterized in that: The armature rotating block combination includes the armature and a rotating block made of plastic material; the rotating block is installed in the middle of the armature, and the central rotating shaft is provided on the rotating block; the rotating block is in an inverted U-shape, and the central rotating shaft is provided at the two side walls of the inverted U-shape of the rotating block; the inverted U-shaped top wall of the rotating block is also provided with an extension plate, and a through hole is provided in the middle of the extended flat plate of the rotating block, and a square oblique convex bud is provided in the middle of the armature corresponding to the through hole of the extended flat plate, and the rotating block is assembled on the armature and the through hole of the rotating block is engaged with the square oblique convex bud of the armature.

11. The miniaturized magnetic latching relay with a double changeover switch according to claim 10, characterized in that: The magnetic circuit part also includes a magnetic steel, and the protruding portion of the coil frame is provided with a magnetic steel mounting hole, and the magnetic steel mounting hole is connected to the iron core mounting hole; The magnet is installed in the magnet mounting hole and contacts the iron core in the iron core mounting hole; a convex tip is provided in the middle of the bottom surface of the armature, and the convex tip is supported by the magnet; the convex tip is coaxially distributed with the central rotating shaft.

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