Magnetic latching relay

Abstract

The utility model relates to the technical field of electronic control devices, and relates to a magnetic latching relay. The magnetic latching relay comprises a magnetic circuit system and a base, wherein the magnetic circuit system is fixed on the base through a coil rack; the yoke assembly is inserted into the coil rack; an accommodating space is formed between the armature and the yoke assembly so as to place the magnetic steel, and the magnetic steel and the armature are arranged in a split manner; the armature is in contact with the magnetic steel through the arc-shaped contact surface and is rotationally arranged relative to the magnetic steel through the arc-shaped contact surface, so that the two ends of the armature are alternately in contact fit with the yoke assembly; a first limiting structure is arranged between the yoke assembly and the armature, the first limiting structure is used for limiting the relative position of the magnetic steel in a second direction, the second direction is perpendicular to the arrangement direction of the yoke assembly and the armature, and the second direction is perpendicular to the extension direction of the rotating axis of the armature. According to the magnetic latching relay, the preparation difficulty can be reduced, the preparation period can be shortened, the cost can be reduced, the assembly difficulty can be reduced, and the scraping phenomenon can be prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of electronic control devices, in particular to a magnetic latching relay. Background Art

[0002] A relay is an electronic control device that has a control system (also called an input circuit) and a controlled system (also called an output circuit). It is usually used in automatic control circuits. It is actually an "automatic switch" that uses a smaller current to control a larger current. Therefore, it plays the role of automatic regulation, safety protection, and circuit conversion in the circuit.

[0003] The existing relay armature part uses an injection molding process to mold the magnet steel and two armatures into one, so as to form an integrated injection molded magnetic circuit. The integrated injection molded magnetic circuit has a long processing cycle and high cost. At the same time, during the assembly process of the existing integrated injection molded magnetic circuit, the yoke and the base collide and easily generate scraps. Utility Model Content

[0004] The embodiment of the present application provides a magnetic latching relay, which can reduce the difficulty of preparation, shorten the preparation cycle, reduce costs, and can also reduce the difficulty of assembly and prevent scraping.

[0005] The present application provides a magnetic latching relay, comprising a magnetic circuit system and a base, wherein the magnetic circuit system comprises a coil frame, a yoke assembly, a magnetic steel and an armature, wherein the magnetic circuit system is fixed to the base through the coil frame; the yoke assembly is inserted into the coil frame; the armature and the yoke assembly are arranged relative to each other to form a first direction, and an accommodation space is formed between the armature and the yoke assembly; the magnetic steel is placed in the accommodation space, and the magnetic steel and the armature are arranged separately;

[0006] An arc-shaped contact surface is provided between the armature and the magnetic steel, the armature contacts one side magnetic pole of the magnetic steel through the arc-shaped contact surface, and the armature is rotatably arranged relative to the magnetic steel through the arc-shaped contact surface, so that the two ends of the armature are alternately contacted and matched with the yoke assembly;

[0007] A first limiting structure is provided between the yoke assembly and the armature, and the first limiting structure is used to limit the relative position of the magnetic steel in a second direction, the second direction is perpendicular to the first direction, and the second direction is perpendicular to the extension direction of the rotation axis of the armature.

[0008] According to some embodiments of the utility model, the first limiting structure includes a first protrusion provided on a side of the yoke assembly facing the armature, and the first protrusion abuts against two opposite sides of the magnetic steel in the second direction.

[0009] According to some embodiments of the utility model, a second limiting structure is provided between the yoke assembly and the armature, and the second limiting structure is used to limit the relative position of the magnetic steel in a third direction, and the third direction is perpendicular to the first direction and the second direction.

[0010] According to some embodiments of the utility model, the second limiting structure includes a second protrusion provided on a side of the yoke assembly facing the armature, and the second protrusion abuts against two opposite sides of the magnetic steel in the third direction.

[0011] According to some embodiments of the utility model, the coil frame is provided with an extension arm assembly, and the extension arm assembly includes two extension arm units arranged opposite to each other in a third direction, each of the extension arm units includes a first extension arm extending in the first direction, and the first extension arm abuts against one side end surface of the magnetic steel in the third direction, and the third direction is perpendicular to the first direction and the second direction.

[0012] According to some embodiments of the utility model, the extension arm unit further includes a second extension arm extending in the first direction, and the second extension arm is located in the third direction on a side of the first extension arm away from the magnetic steel;

[0013] The armature has a notch in the third direction, and the second extension arm is placed in the corresponding notch to serve as a rotation force axis when the armature rotates.

[0014] According to some embodiments of the utility model, along the second direction, there is a first gap between the inner wall of the armature forming the notch and the second extension arm, and the range value of the first gap is 0.03 mm to 0.05 mm.

[0015] According to some embodiments of the utility model, the extension arm unit also includes an auxiliary extension arm extending in the first direction, the auxiliary extension arm is located on the side of the first extension arm away from the magnetic steel in the third direction, and the auxiliary extension arm is located on the side of the second extension arm in the third direction, and the auxiliary extension arm and the second extension arm are placed in the same notch to serve as an auxiliary force-bearing axis when the armature rotates.

[0016] According to some embodiments of the utility model, along the second direction, a second gap is provided between the inner wall of the armature forming the notch and the auxiliary extension arm, and the range value of the second gap is 0.03 mm to 0.1 mm.

[0017] According to some embodiments of the utility model, a size of the second gap in the second direction is larger than a size of the first gap in the second direction.

[0018] According to some embodiments of the utility model, a dimension of the second extension arm in the third direction is greater than a dimension of the auxiliary extension arm in the third direction.

[0019] According to some embodiments of the utility model, the wall surface of the armature forming the notch has a horizontal extension section and an inclined extension section, and the inclined extension section is located on the side of the horizontal extension section close to the magnetic steel; along the second direction, the two horizontal extension sections are arranged opposite to each other on both sides of the second extension arm, and the two inclined extension sections are arranged opposite to each other on both sides of the second extension arm; and along the direction of the armature pointing to the magnetic steel, the distance between the two inclined extension sections arranged opposite to each other in the second direction gradually increases.

[0020] According to some embodiments of the utility model, the armature is provided with a protrusion group in the third direction, and the protrusion group includes two protrusions spaced apart in the second direction, and the gap is formed between the two protrusions.

[0021] According to some embodiments of the utility model, the magnetic circuit system also includes a coil, which is wound on the surface of the coil frame; the coil includes a first part and a second part, the second part and the first part are spaced apart along the second direction, and the coil frame is provided with a partition between the first part and the second part.

[0022] According to some embodiments of the utility model, the yoke assembly includes a first contact portion and a second contact portion arranged opposite to each other in the second direction, the first contact portion is used to contact and cooperate with one end of the armature to form a first snapping surface, and the second contact portion is used to contact and cooperate with the other end of the armature to form a second snapping surface, and the second snapping surface is arranged coplanar with the first snapping surface.

[0023] According to some embodiments of the utility model, a convex burl is provided on the side of the armature facing the magnetic steel, and the convex burl forms the arc-shaped contact surface; along the second direction, the distance between the second mating surface and the convex burl is equal to the distance between the first mating surface and the convex burl.

[0024] According to some embodiments of the utility model, the convex burl is in the shape of an elongated strip and extends in a direction parallel to the rotation axis of the armature.

[0025] According to some embodiments of the utility model, the coil frame and the base are an integrated structure.

[0026] One embodiment of the above utility model has at least the following advantages or beneficial effects:

[0027] 1. In the magnetic latching relay provided by the present application, the armature and the magnetic steel are split structures, and no integral insert injection molding is required during the preparation process, making the parts simple and easy to prepare. This structural setting can improve the production efficiency and production quality of the parts and reduce the preparation cost. Moreover, when assembling the armature and the magnetic steel, a single machine can be used for automated assembly, which reduces the difficulty of assembly and improves the efficiency of part assembly.

[0028] Moreover, the yoke assembly is fixed to the base through the coil frame, and collision between the yoke assembly and the base is not easy to occur. At the same time, since the external magnetic steel is effectively positioned and limited by the first limiting structure, the magnetic steel is not easy to scratch the base. Accordingly, when assembling the magnetic circuit system in the present application, scraping is not easy to occur between the magnetic circuit system and the base, which can reduce the risk of foreign matter in the process.

[0029] Furthermore, the magnetic latching relay provided in the present application eliminates the injection molding of the armature, exposes the magnet, and positions and limits the magnet through a first limiting structure, which can simplify parts, reduce the difficulty of preparation and assembly, shorten the preparation cycle, and reduce costs.

[0030] 2. In the magnetic latching relay provided in the present application, the armature injection molding is eliminated, and the magnet is exposed to the outside. The magnet is positioned and limited by the first extension arm and the first limiting structure on both sides of the coil frame, which can simplify the parts and reduce the cycle.

[0031] 3. In the magnetic latching relay provided in the present application, the armature, magnetic steel and yoke assembly are formed into a whole through the coil frame, which can reduce the use rate of plastic and achieve a low-cost and scraping-free design concept.

[0032] 4. In order to ensure the supporting effect of the second extension arm during the rotation of the armature, an auxiliary extension arm is provided in the magnetic holding relay provided in the present application, instead of thickening the thickness of the second extension arm in the third direction Y alone, which can ensure good assembly while strengthening the supporting strength of the rotating shaft.

[0033] 5. In the magnetic latching relay provided by the present application, a convex bulge is provided on the side of the armature facing the magnetic steel, and the convex bulge forms an arc-shaped contact surface; the second snap-fit ​​surface is coplanar with the first snap-fit ​​surface, and the distance between the two is equal to the convex bulge. This structural setting can meet the requirement of consistent armature swing arm length during armature overlap, so as to ensure the balance of initial suction and final suction of the magnetic circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 What is shown is a three-dimensional structural schematic diagram of a magnetic latching relay provided by an embodiment of the utility model;

[0035] Figure 2 It is shown that Figure 1 A schematic diagram of the three-dimensional structure of the middle part of the structure at another angle;

[0036] Figure 3 It shows Figure 2 A schematic diagram of the middle structure;

[0037] Figure 4 It shows Figure 3 Schematic diagram of the three-dimensional structure of the middle part;

[0038] Figure 5 It shows Figure 4 A schematic diagram of the three-dimensional structure of the middle structure at another angle;

[0039] Figure 6 It is shown that Figure 4 Side view of the middle structure;

[0040] Figure 7 It shows Figure 4 Schematic diagram of the three-dimensional structure of the middle armature;

[0041] Figure 8 It shows Figure 4 A schematic diagram of the three-dimensional structure of the first contact portion in the middle yoke iron assembly;

[0042] Fig. 9 It is shown that Figure 8 The enlarged schematic diagram of point B in the middle;

[0043] Fig.10 It shows Figure 4 Another schematic diagram of the three-dimensional structure of the first contact portion in the middle yoke iron assembly;

[0044] Fig.11 It is shown that Figure 2 The enlarged schematic diagram of point A in the middle;

[0045] Fig.12 It is shown that Figure 2 Schematic diagram of the planar structure of the magnetic latching relay;

[0046] Fig.13 It shows Fig.12 The enlarged schematic diagram of the center C;

[0047] Fig.14 It is shown that Figure 1 A schematic plan view of the structure;

[0048] Fig.15 It shows Fig.14 Cross-sectional view at AA in the middle.

[0049] The following are the descriptions of the reference numerals:

[0050] 100, magnetic circuit system; 110, coil frame; 111, first extension arm; 112, second extension arm; 113, auxiliary extension arm; 1131, anti-slip structure; 120, coil; 121, first part; 122, second part; 130, yoke assembly; 131, first contact portion; 1311, first protrusion; 1312, second protrusion; 132, second contact portion; 133, iron core; 140, magnet; 150, armature; 151, convex bud; 152, notch; 153, protrusion group; 1531, protrusion; 200, base; M, guide ramp; P1, horizontal extension section; P2, inclined extension section. DETAILED DESCRIPTION

[0051] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this application will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0052] The present application embodiment provides a magnetic latching relay. Figure 1 and Figure 2 As shown in the structure, the magnetic latching relay includes a magnetic circuit system 100 and a base 200, the magnetic circuit system 100 includes a coil frame 110, a yoke assembly 130, a magnet 140 and an armature 150, the magnetic circuit system 100 is fixed to the base 200 through the coil frame 110; the yoke assembly 130 is inserted into the coil frame 110; the armature 150 and the yoke assembly 130 are arranged relative to each other to form a first direction X, and an accommodating space is formed between the armature 150 and the yoke assembly 130; the magnet 140 is placed in the accommodating space, and the magnet 140 and the armature 150 are arranged separately.

[0053] It should be understood that the structure of the base 200 is not limited to Figure 1 and Figure 2 As shown, it can be configured in other forms according to the requirements. For example, the base 200 can be a shell structure with an installation cavity, so that the magnetic circuit system 100 can be installed in the shell structure.

[0054] It should be noted that the armature 150 and the magnetic steel 140 in the magnetic latching relay provided in the embodiment of the present application are split structures, and no integral insert injection molding is required during the preparation process, making the parts simple and easy to prepare. This structural setting can improve the production efficiency and production quality of the parts and reduce the preparation cost. Moreover, when assembling the armature 150 and the magnetic steel 140, a single machine can be used for automated assembly, which reduces the difficulty of assembly and improves the efficiency of assembly of parts.

[0055] Moreover, the yoke assembly 130 is fixed to the base 200 through the coil frame 110, and collision is not easy to occur between the yoke assembly 130 and the base 200. At the same time, since the external magnetic steel 140 is effectively positioned and limited by the first limiting structure, the magnetic steel 140 is not easy to scratch the base 200. Accordingly, when assembling the magnetic circuit system 100 in the embodiment of the present application, scraping is not easy to occur between the magnetic circuit system 100 and the base 200, which can reduce the risk of foreign matter in the process.

[0056] Please combine Figures 1 to 6 refer to Figure 7 In the structure shown, an arc-shaped contact surface is provided between the armature 150 and the magnet 140, and the armature 150 contacts one magnetic pole of the magnet 140 through the arc-shaped contact surface, and the armature 150 is rotated relative to the magnet 140 through the arc-shaped contact surface, so that the two ends of the armature 150 are alternately contacted and matched with the yoke assembly 130. It should be understood that the magnetic pole on the opposite side of the magnet 140 contacts the yoke assembly 130.

[0057] Specifically, the magnetic holding relay provided in the embodiment of the present application uses an armature 150 to rotate to complete the magnetic circuit overlapping problem. The armature 150 contacts the magnet 140 through an arc-shaped contact surface, and its rotating support surface is the surface of the magnet 140. The two ends of the armature 150 are alternately contacted and cooperated with the yoke assembly 130 during the rotation process.

[0058] It is worth noting that please continue to refer to Figures 1 to 3 In the structure shown, the magnetic circuit system 100 further includes a coil 120 , which is wound around the surface of the coil frame 110 .

[0059] During operation, when the coil 120 is excited, the armature 150 swings under the combined action of the magnetic steel 140 and the yoke assembly 130, so that one end of the armature 150 contacts the yoke assembly 130. At this time, the armature 150, the magnetic steel 140, and part of the yoke assembly 130 form a complete magnetic circuit. For example, the magnetic circuit is as follows: Figure 3 When the coil 120 is de-energized, the armature 150 swings in the opposite direction, so that the other end of the armature 150 contacts the other part of the yoke assembly 130. At this time, another complete magnetic circuit is formed between the armature 150, the magnet 140, and the remaining part of the yoke assembly 130. For example, the magnetic circuit is as shown in FIG. Figure 3 Indicated by the dashed arrow.

[0060] Please combine Figure 1 refer to Figures 3 to 9In the structure shown, a first limiting structure is provided between the yoke assembly 130 and the armature 150, and the first limiting structure is used to limit the relative position of the magnetic steel 140 in the second direction Z to prevent the magnetic steel 140 from moving along the second direction Z during assembly and use, so as to ensure that the magnetic latching relay functions effectively. The second direction Z is perpendicular to the first direction X, and the second direction Z is perpendicular to the extension direction of the rotation axis of the armature 150.

[0061] It should be noted that the magnetic latching relay provided in the embodiment of the present application eliminates the injection molding of the armature 150, exposes the magnet 140 to the outside, and positions and limits the magnet 140 through a first limiting structure, which can simplify parts, reduce the difficulty of preparation and assembly, shorten the preparation cycle, and reduce costs.

[0062] When the first limiting structure is provided, there are many possible forms of providing the first limiting structure.

[0063] In a specific embodiment, Figure 3 As shown, the first limiting structure includes a first protrusion 1311 disposed on a side of the yoke assembly 130 facing the armature 150 , and the first protrusion 1311 abuts against two opposite sides of the magnetic steel 140 in the second direction.

[0064] It is worth noting that Figure 8 As shown, the number of the first protrusions 1311 on the surface of the yoke assembly 130 can be set according to demand, but at least the first protrusions 1311 are relatively arranged in the second direction Z to effectively limit the magnetic steel 140 in the second direction Z.

[0065] If the magnetic latching relay provided in the embodiment of the present application is arranged horizontally, the second direction Z can be understood as a vertical direction. For example, Figure 8 Three first protrusions 1311 are arranged on the surface of the middle yoke assembly 130, one first protrusion 1311 is located near the top of the yoke assembly 130, two first protrusions 1311 are located near the bottom of the yoke assembly 130, and the two first protrusions 1311 located near the bottom are spaced apart in the third direction Y to effectively support and limit the magnetic steel 140.

[0066] In order to facilitate the assembly of the magnetic steel 140 in the limiting space formed by the first protrusion 1311, Fig. 9 As shown, a guide slope M is provided on the first protrusion 1311 to facilitate the insertion of the magnet 140 and prevent the sharp corners of the first protrusion 1311 from scratching the magnet 140 and affecting the performance of the magnet 140.

[0067] It is understandable that the magnet 140 and the armature 150 may be in direct contact or may be provided with a magnetic conductive member and indirectly contacted through the magnetic conductive member. Similarly, the magnet 140 and the yoke assembly 130 may be in direct contact or may be provided with a magnetic conductive member and indirectly contacted through the magnetic conductive member.

[0068] It is worth noting that when assembling the magnetic latching relay provided in the embodiment of the present application, after assembling the components, the magnetic steel 140 needs to be pressed and magnetized. After magnetization, the magnetic steel 140 will be adsorbed on the surface of the yoke assembly 130. At the same time, the armature 150 is attracted by the magnetic steel 140 and will not fall off. Accordingly, when the armature 150 and the magnetic steel 140 are separately arranged, the magnetic steel 140 does not need to be pressed and limited by the armature 150 in the first direction X.

[0069] In another specific embodiment, the first limiting structure includes a concave portion and a convex portion that cooperate with each other, and one of the convex portion and the concave portion is provided on the yoke assembly 130, and the other is provided on the magnetic steel 140. Exemplarily, the magnetic steel 140 is provided with a convex portion, which is inserted into the concave portion of the yoke assembly 130 to limit the relative position of the magnetic steel 140 in the second direction Z. Alternatively, the yoke assembly 130 is provided with a convex portion, which is inserted into the concave portion of the magnetic steel 140 to limit the relative position of the magnetic steel 140 in the second direction Z.

[0070] In order to further improve the stability of the magnetic steel 140 after assembly and ensure that the magnetic steel 140 is assembled to a preset position, the magnetic steel 140 may be further limited in the third direction Y.

[0071] In one embodiment, a second limiting structure is provided between the yoke assembly 130 and the armature 150, and the second limiting structure is used to limit the relative position of the magnetic steel 140 in the third direction Y, and the third direction Y is perpendicular to the first direction X and the second direction Z. Accordingly, the embodiment of the present application limits or positions the magnetic steel 140 through the first limiting structure and the second limiting structure provided on the yoke assembly 130.

[0072] When the second limiting structure is provided, there are many possible forms of providing the second limiting structure.

[0073] In a specific embodiment, please refer to Fig.10 In the structure shown, the second limiting structure includes a second protrusion 1312 disposed on the side of the yoke assembly 130 facing the armature 150, and the second protrusion 1312 abuts against two opposite sides of the magnetic steel 140 in the third direction Y. Accordingly, the embodiment of the present application limits or positions the magnetic steel 140 by means of the first protrusion 1311 and the second protrusion 1312 disposed on the yoke assembly 130.

[0074] Similarly, the number of the second protrusions 1312 on the surface of the yoke assembly 130 can be set according to the number and is not limited to Fig.10Moreover, the surface of the second protrusion 1312 can also be provided with a guide slope (not shown) with reference to the first protrusion 1311 to further reduce the difficulty of assembling the magnetic steel 140 .

[0075] In another specific embodiment, the second limiting structure includes a concave portion and a convex portion that cooperate with each other, and one of the convex portion and the concave portion is provided on the yoke assembly 130, and the other is provided on the magnetic steel 140. Exemplarily, the magnetic steel 140 is provided with a convex portion, which is inserted into the concave portion of the yoke assembly 130 to limit the relative position of the magnetic steel 140 in the third direction Y. Alternatively, the yoke assembly 130 is provided with a convex portion, which is inserted into the concave portion of the magnetic steel 140 to limit the relative position of the magnetic steel 140 in the third direction Y.

[0076] In another embodiment, please combine Figure 2 refer to Figure 11 to Figure 12 In the structure shown, the coil frame 110 is provided with an extension arm assembly, and the extension arm assembly includes two extension arm units arranged opposite to each other in the third direction Y, each extension arm unit includes a first extension arm 111 extending in the first direction X, and the first extension arm 111 abuts against one side end surface of the magnetic steel 140 in the third direction Y, and the third direction Y is perpendicular to the first direction X and the second direction Z.

[0077] Specifically, compared with the structure in another embodiment, in the embodiment of the present application, the yoke assembly 130 is only provided with the first protrusion 1311 , and thus the size of the yoke assembly 130 does not need to be too large, which can reduce the manufacturing cost and the manufacturing difficulty.

[0078] Moreover, it should be noted that in the embodiment of the present application, the injection molding of the armature 150 is eliminated, and the magnet 140 is exposed to the outside. The magnet 140 is positioned and limited by the first extension arm 111 on both sides of the coil frame 110 and the first limiting structure, which can simplify the parts and reduce the cycle.

[0079] Among them, the length of the first extension arm 111 in the first direction X can be set shorter as required to avoid the length being too long to abut against the armature 150 and affect the assembly of the armature 150. Of course, the length of the first extension arm 111 in the first direction X cannot be too short, and it is necessary to ensure that the first extension arm 111 effectively limits the magnetic steel 140. At the same time, the thickness of the first extension arm 111 in the third direction Y can be set thicker as required to ensure the limiting effect of the first extension arm 111 on the magnetic steel 140 in the third direction Y, and avoid the first extension arm 111 being too thin to apply sufficient clamping force to the magnetic steel 140.

[0080] In one embodiment, please refer to Figures 11 to 15In the structure shown, the extension arm unit also includes a second extension arm 112 extending in the first direction X, and the second extension arm 112 is located on the side of the first extension arm 111 away from the magnet 140 in the third direction Y; the armature 150 has a notch 152 in the third direction Y, and the second extension arm 112 is placed in the notch 152 corresponding to it to serve as a rotation force axis when the armature 150 rotates.

[0081] Specifically, when the armature 150 rotates, the two second extension arms 112 located on both sides of the armature 150 in the third direction Y serve as rotation force axes to limit the rotation fulcrum of the armature 150 and ensure effective rotation of the armature 150 .

[0082] It should be noted that the structural setting in the embodiment of the present application enables the armature 150, the magnet 140 and the yoke assembly 130 to form a whole through the coil frame 110, which can reduce the use rate of plastic and achieve a low-cost and scraping-free design concept.

[0083] It is worth noting that please refer to Fig.13 In the structure shown, the armature 150 and the second extension arm 112 have a first gap in the second direction Z, and the two are not interference fit, so that the armature 150 can be rotated to prevent jamming.

[0084] Of course, the first gap between the armature 150 and the second extension arm 112 in the second direction Z cannot be too large to prevent the armature 150 from shaking too much during the rotation process. Preferably, the value range of the first gap between the two is 0.03mm-0.05mm.

[0085] It is worth noting that since the armature 150 needs to swing relative to the magnetic steel 140 through the convex bulge 151, a support structure is required as a fulcrum for the swing of the armature 150. In one embodiment, an additional support structure fixed relative to the base 200 can be provided to serve as a force support axis when the armature 150 rotates. In another embodiment, please refer to Figures 11 to 15 In the structure shown, the extension arm unit also includes an auxiliary extension arm 113 extending in the first direction X. The auxiliary extension arm 113 is located on the side of the first extension arm 111 away from the magnetic steel 140 in the third direction Y, and the auxiliary extension arm 113 is located on the side of the second extension arm 112 in the third direction Y. The auxiliary extension arm 113 and the second extension arm 112 are placed in the same notch 152 to serve as an auxiliary force-bearing axis when the armature 150 rotates.

[0086] The auxiliary extension arm 113 can also be used as a rotation force axis when the armature 150 rotates. If the second extension arm 112 cannot effectively provide a supporting force during the rotation of the armature 150, the auxiliary extension arm 113 can play a role as an auxiliary force axis.

[0087] It should be noted that in order to ensure the supporting effect of the second extension arm 112 on the armature 150 during rotation, an auxiliary extension arm 113 is provided in the embodiment of the present application, instead of thickening the thickness of the second extension arm 112 in the third direction Y alone, which can ensure good assembly while strengthening the support strength of the rotating shaft.

[0088] It is worth noting that please continue to refer to Fig.13 In the structure shown, the armature 150 and the auxiliary extension arm 113 have a second gap in the second direction Z, and the two are not interference fit, so that the armature 150 can rotate and prevent the action from being stuck. Under the condition of ensuring strength, the second gap can be larger. Of course, the second gap between the armature 150 and the second extension arm 112 in the second direction Z cannot be too large to prevent the armature 150 from shaking too much during the rotation process. Preferably, the value range of the second gap between the two is 0.03mm~0.1mm.

[0089] In a specific embodiment, the dimension of the second gap in the second direction Z is greater than the dimension of the first gap in the second direction Z, so as to ensure that the second extension arm 112 plays a major supporting role in the armature 150 during the rotation process.

[0090] Please refer to Fig.15 In the structure shown, the thickness of the second extension arm 112 in the third direction Y is greater than the thickness of the auxiliary extension arm 113 in the third direction Y, so as to enhance the supporting effect of the armature 150 during the rotation process.

[0091] It is worth noting that Fig.11 As shown, along the second direction Z, the second extension arm 112 is located between the first extension arm 111 and the auxiliary extension arm 113 on the same side. At this time, it can also be arranged that along the third direction Y, the first extension arm 111 and the second extension arm 112 form a whole, so that the first extension arm 111 effectively supports the second extension arm 112.

[0092] Of course, the auxiliary extension arm 113 may be placed between the first extension arm 111 and the second extension arm 112 as required. The specific configuration may be based on the requirements and will not be described in detail herein.

[0093] Please continue to refer to Fig.11 In the structure shown, an anti-slip structure 1131 is provided at one end of the auxiliary extension arm 113 away from the coil 120 in the first direction X, and the anti-slip structure 1131 is used to prevent the armature 150 from slipping out along the first direction X. Of course, an anti-slip structure can also be provided at one end of the second extension arm 112 away from the coil 120 in the first direction X, and the details are not repeated here.

[0094] In one embodiment, please combine Fig.11 Continue to refer Fig.12 and Fig.13 In the structure shown, the wall surface of the armature 150 forming the notch 152 has a horizontal extension section P1 and an inclined extension section P2, and the inclined extension section P2 is located on the side of the horizontal extension section P1 close to the magnet 140; along the second direction Z, the two horizontal extension sections P1 are arranged opposite to each other on both sides of the second extension arm 112, and the two inclined extension sections P2 are arranged opposite to each other on both sides of the second extension arm 112; and along the direction of the armature 150 pointing to the magnet 140, the distance between the two inclined extension sections P2 arranged opposite to each other in the second direction Z gradually increases.

[0095] Specifically, when the armature 150 is in a vertical state along the second direction Z, the horizontal extension section P1 is roughly parallel to the surface of the second extension arm 112; when the armature 150 rotates relative to the magnet 140, one inclined extension section P2 approaches the second extension arm 112 along the second direction Z, and the other inclined extension section P2 moves away from the second extension arm 112 along the second direction Z.

[0096] For example, if the top end of the armature 150 in the second direction Z is close to the yoke assembly 130, the inclined extension section P2 located near the top of the two inclined extension sections P2 moves in the second direction Z toward the second extension arm 112. At this time, the bottom end of the armature 150 in the second direction Z is away from the yoke assembly 130, and the inclined extension section P2 located near the bottom of the two inclined extension sections P2 moves in the second direction Z toward the second extension arm 112.

[0097] It should be noted that when forming the armature 150 structure, a chamfering process can be performed on the surface of the armature 150 to form an inclined extension section P2. The inclined state of the inclined extension section P2 affects the rotation angle of the armature 150 and needs to be set according to needs.

[0098] When forming the notch 152 on the armature 150, there are many possible ways to form the notch 152. In one embodiment, portions may be cut on both sides of the flat armature 150 to form the notch 152. Alternatively, in another embodiment, as Figure 7 The structure shown can be configured as follows: the armature 150 is provided with a protrusion group 153 in the third direction Y, the protrusion group 153 includes two protrusions 1531 spaced apart in the second direction Z, and a notch 152 is formed between the two protrusions 1531. It is worth noting that since the protrusion group 153 protrudes from the surface of the flat armature 150, the difficulty of assembly can be reduced, and the volume and size of the armature 150 can be reduced, which is conducive to miniaturization and lightweight configuration of the magnetic circuit holding relay.

[0099] It is worth noting that there are many possible winding forms of the coil 120 on the surface of the coil frame 110. In a specific embodiment, Figures 1 to 3As shown, the coil 120 includes a first portion 121 and a second portion 122, the second portion 122 and the first portion 121 are spaced apart along the second direction Z, and the coil frame 110 is provided with a partition between the first portion 121 and the second portion 122. The extension arm unit extends from the partition position to limit the magnetic steel 140 and provide a force axis for the rotation of the armature 150.

[0100] In one embodiment, please continue to refer to Figures 1 to 6 In the structure shown, the yoke assembly 130 includes a first contact portion 131 and a second contact portion 132 which are arranged relatively to each other in the second direction Z. The first contact portion 131 is used to contact and cooperate with one end of the armature 150 to form a first snapping surface, and the second contact portion 132 is used to contact and cooperate with the other end of the armature 150 to form a second snapping surface. The second snapping surface is arranged coplanar with the first snapping surface to enhance the contact effect between the armature 150 and the yoke assembly 130.

[0101] Among them, since the first snapping surface and the second snapping surface are arranged coplanarly, the armature 150 can be roughly arranged into a flat sheet structure.

[0102] As an example, please refer to Figures 1 to 6 In the structure shown, the first contact portion 131 and the second contact portion 132 are located on opposite sides of the coil 120 in the second direction Z and are fixed relative to the coil 120; each of the first contact portion 131 and the second contact portion 132 extends from a fixed point with the coil 120 to one side of the armature 150; and at least part of the first contact portion 131 and the second contact portion 132 extends between the coil 120 and the armature 150 to be arranged opposite to the armature 150. It can be understood that Figure 1 An extension dimension of the first contact portion 131 in the second direction Z is greater than an extension dimension of the second contact portion 132 in the second direction Z.

[0103] For example, in the embodiment of the present application, the first contact portion 131 is located away from the base 200 along the second direction Z, and the magnetic steel 140 is disposed on the first contact portion 131. Of course, it can also be configured as required: the first contact portion 131 is located close to the base 200 along the second direction Z, or part of the first contact portion 131 extends from the inside of the base 200, and the details are not repeated here.

[0104] It is worth noting that when the arc-shaped contact surface between the armature 150 and the magnetic steel 140 is provided, there are many possible forms of the arc-shaped contact surface. Figure 7As shown, the armature 150 is provided with a bulge 151 on the side facing the magnet 140, and the bulge 151 forms an arcuate contact surface, and the armature 150 contacts the magnet 140 through the arcuate contact surface; or, the magnet 140 is provided with a bulge on the side facing the armature 150, and the bulge forms an arcuate contact surface, and the armature 150 contacts the magnet 140 through the arcuate contact surface.

[0105] When the convex bulge 151 is provided on the armature 150, the convex bulge 151 and the armature 150 may be an integrated structure to improve the rotation stability of the armature 150. Of course, the armature 150 and the convex bulge 151 may also be provided as a separate structure according to the requirements, and the details are not repeated here.

[0106] Similarly, the arrangement between the convex bulge and the magnetic steel 140 may refer to the arrangement between the convex bulge 151 and the armature 150 , and the details will not be repeated here.

[0107] In a specific embodiment, when the armature 150 is provided with a convex bulge 151 on the side facing the magnetic steel 140, and the convex bulge 151 forms an arc-shaped contact surface, it can be set that: along the second direction Z, the size of the second clapping surface from the convex bulge 151 is equal to the size of the first clapping surface from the convex bulge 151. It should be noted that in the embodiment of the present application, the second clapping surface is coplanar with the first clapping surface, and the sizes of the two from the convex bulge 151 are equal. This structural setting can meet the requirement of consistent length of the swing arm of the armature 150 during the overlap of the armature 150, so as to ensure the balance of the initial suction and final suction of the magnetic circuit.

[0108] In one embodiment, please continue to refer to Figures 3 to 6 In the structure shown, the yoke assembly 130 also includes an iron core 133 , which is inserted into the coil 120 , and the first contact portion 131 is fixed to one end of the iron core 133 that exposes the coil 120 , and the second contact portion 132 is fixed to the other end of the iron core 133 that exposes the coil 120 .

[0109] It is worth noting that the iron core 133 and the first contact portion 131 and the second contact portion 132 in the yoke assembly 130 can be an integrated structure or a segmented structure. For example, when the iron core 133 and the first contact portion 131 and the second contact portion 132 are a split structure, the iron core 133 can be passed through the coil frame 110, and then the first contact portion 131 and the second contact portion 132 are riveted on both sides.

[0110] Please continue to refer to Figures 3 to 7 In the structure shown, in this embodiment, the armature 150 is in line-surface contact with the magnetic steel 140. The convex bulge 151 is in the shape of an elongated strip and extends in a direction parallel to the rotation axis of the armature 150.

[0111] In one embodiment, the coil frame 110 and the base 200 are an integrated structure to improve the relative stability between the coil frame 110 and the base 200, thereby improving the stability of other structures after being assembled on the coil frame 110, thereby reducing assembly steps and improving assembly efficiency.

[0112] In addition, it is worth noting that since the coil frame 110 and the base 200 are an integrated structure, they can be prepared by casting to reduce the difficulty and cost of preparation.

[0113] Finally, it should be noted that: it is understandable that the various embodiments / implementations provided by the present utility model can be combined with each other without causing any contradiction, and will not be illustrated one by one here.

[0114] In the embodiments of the utility model, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise clearly defined. The terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the utility model can be understood according to the specific circumstances.

[0115] In the description of the utility model embodiments, it needs to be understood that the directions or positional relationships indicated by terms such as "up", "down", "left", "right", "front", and "back" are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the utility model embodiments and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, cannot be understood as a limitation on the utility model embodiments.

[0116] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model embodiment. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0117] The above are only preferred embodiments of the utility model embodiments, and are not intended to limit the utility model embodiments. For those skilled in the art, the utility model embodiments may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model embodiments shall be included in the protection scope of the utility model embodiments.

Claims

1. A magnetic latching relay, characterized in that: It comprises a magnetic circuit system and a base, wherein the magnetic circuit system comprises a coil frame, a yoke assembly, a magnetic steel and an armature, wherein the magnetic circuit system is fixed to the base through the coil frame; the yoke assembly is inserted into the coil frame; the armature and the yoke assembly are arranged opposite to each other to form a first direction, and an accommodation space is formed between the armature and the yoke assembly; The magnetic steel is placed in the accommodating space, and the magnetic steel and the armature are separately arranged; An arc-shaped contact surface is provided between the armature and the magnetic steel, the armature contacts one side magnetic pole of the magnetic steel through the arc-shaped contact surface, and the armature is rotatably arranged relative to the magnetic steel through the arc-shaped contact surface, so that the two ends of the armature are alternately contacted and matched with the yoke assembly; A first limiting structure is provided between the yoke assembly and the armature, and the first limiting structure is used to limit the relative position of the magnetic steel in a second direction, the second direction is perpendicular to the first direction, and the second direction is perpendicular to the extension direction of the rotation axis of the armature.

2. The magnetic latching relay according to claim 1, characterized in that: The first limiting structure includes a first protrusion provided on a side of the yoke assembly facing the armature, and the first protrusion abuts against two opposite sides of the magnetic steel in the second direction.

3. The magnetic latching relay according to claim 1, characterized in that: A second limiting structure is provided between the yoke assembly and the armature, and the second limiting structure is used to limit the relative position of the magnetic steel in a third direction, and the third direction is perpendicular to the first direction and the second direction.

4. The magnetic latching relay according to claim 3, characterized in that: The second limiting structure includes a second protrusion provided on a side of the yoke assembly facing the armature, and the second protrusion abuts against two opposite sides of the magnetic steel in the third direction.

5. The magnetic latching relay according to claim 1, characterized in that: The coil frame is provided with an extension arm assembly, which includes two extension arm units arranged opposite to each other in a third direction, each of which includes a first extension arm extending in the first direction, the first extension arm abuts against one side end surface of the magnetic steel in the third direction, and the third direction is perpendicular to the first direction and the second direction.

6. The magnetic latching relay according to claim 5, characterized in that: The extension arm unit further includes a second extension arm extending in the first direction, and the second extension arm is located in the third direction on a side of the first extension arm away from the magnetic steel; The armature has a notch in the third direction, and the second extension arm is placed in the corresponding notch to serve as a rotation force axis when the armature rotates.

7. The magnetic latching relay according to claim 6, characterized in that: Along the second direction, there is a first gap between the inner wall of the armature forming the notch and the second extension arm, and the range value of the first gap is 0.03 mm to 0.05 mm.

8. The magnetic latching relay according to claim 7, characterized in that: The extension arm unit also includes an auxiliary extension arm extending in the first direction, the auxiliary extension arm is located on the side of the first extension arm away from the magnetic steel in the third direction, and the auxiliary extension arm is located on the side of the second extension arm in the third direction, and the auxiliary extension arm and the second extension arm are placed in the same notch to serve as an auxiliary force-bearing axis when the armature rotates.

9. The magnetic latching relay according to claim 8, characterized in that: Along the second direction, a second gap is provided between the inner wall of the armature forming the notch and the auxiliary extension arm, and the range value of the second gap is 0.03 mm to 0.1 mm.

10. The magnetic latching relay according to claim 9, characterized in that: A size of the second gap in the second direction is greater than a size of the first gap in the second direction.

11. The magnetic latching relay according to claim 10, characterized in that: A dimension of the second extension arm in the third direction is greater than a dimension of the auxiliary extension arm in the third direction.

12. The magnetic latching relay according to claim 6, characterized in that: The wall surface of the armature forming the notch has a horizontal extension section and an inclined extension section, and the inclined extension section is located on the side of the horizontal extension section close to the magnetic steel; along the second direction, the two horizontal extension sections are arranged opposite to each other on both sides of the second extension arm, and the two inclined extension sections are arranged opposite to each other on both sides of the second extension arm; and along the direction of the armature pointing to the magnetic steel, the distance between the two inclined extension sections arranged opposite to each other in the second direction gradually increases.

13. The magnetic latching relay according to claim 12, characterized in that: The armature is provided with a protrusion group in the third direction, and the protrusion group includes two protrusions arranged at intervals in the second direction, and the gap is formed between the two protrusions.

14. The magnetic latching relay according to any one of claims 1 to 13, characterized in that: The magnetic circuit system also includes a coil, which is wound around the surface of the coil frame; the coil includes a first part and a second part, the second part and the first part are spaced apart along the second direction, and the coil frame is provided with a partition between the first part and the second part.

15. The magnetic latching relay according to any one of claims 1 to 13, characterized in that: The yoke assembly includes a first contact portion and a second contact portion arranged opposite to each other in the second direction, the first contact portion is used to contact and cooperate with one end of the armature to form a first snapping surface, and the second contact portion is used to contact and cooperate with the other end of the armature to form a second snapping surface, and the second snapping surface is arranged coplanar with the first snapping surface.

16. The magnetic latching relay according to claim 15, characterized in that: A convex bulge is provided on the side of the armature facing the magnetic steel, and the convex bulge forms the arc-shaped contact surface; along the second direction, the distance between the second mating surface and the convex bulge is equal to the distance between the first mating surface and the convex bulge.

17. The magnetic latching relay according to claim 16, characterized in that: The convex burl is in the shape of an elongated strip and extends in a direction parallel to the rotation axis of the armature.

18. The magnetic latching relay according to any one of claims 1 to 13, characterized in that: The coil frame and the base are an integrated structure.

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