A small relay that simplifies assembly

Abstract

The present invention discloses a small relay that can be simplified in assembly, including a base, a coil frame, an iron core and a yoke; the coil frame includes flanges at both ends, a winding window between the two flanges and a through hole that penetrates the two flanges; the iron core and the yoke are L-shaped respectively; the horizontal side of the L-shaped iron core is inserted into the through hole of the coil frame from the outside of one of the flanges of the coil frame, the bottom of the vertical side of the L-shaped iron core is plugged and fixed on the base, and the part of the vertical side of the L-shaped iron core exposed outside one of the flanges of the coil frame is set as the pole surface of the iron core; the bottom of the vertical side of the yoke is plugged and fixed on the base. The present invention can simplify assembly, and can reduce the volume of the relay and the height of the relay on the basis of ensuring that the iron core has a sufficiently large pole surface, so as to meet the small space installation and use of the relay.

Description

Technical Field

[0001] The invention relates to the technical field of relays, and in particular to a small relay which can be assembled in a simplified manner. 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 adjustment, safety protection, and circuit conversion in the circuit. Since the control function of relays has been widely used in various fields, with the continuous expansion of the application field of relays, the requirements for relays are also getting higher and higher. A relay in the prior art requires the size of the relay to be as small as possible due to the limitation of the installation space. However, since it is necessary to ensure that the relay has certain performance indicators, such as a certain large iron core pole surface, the size of the relay cannot be reduced, which affects the installation and use of the relay. On the other hand, the relay of the prior art includes a magnetic circuit part, which includes components such as an iron core, a yoke and a coil frame. The iron core is a straight-line structure, and the yoke is an L-shaped structure. During assembly, the straight-line iron core is usually passed through the through hole of the coil frame, one end of the iron core is set as the pole face, and the other end is fixed to one side of the L-shaped yoke by riveting, and the other side of the L-shaped yoke is matched with the outer side of the winding window of the coil frame. Then, this assembly is installed on the base. The yoke and the coil frame need to be positioned during installation, which causes the disadvantage of complicated assembly. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a small relay that can be simplified in assembly. Through structural improvement, the assembly can be simplified and the volume and height of the relay can be reduced on the basis of ensuring that the iron core has a sufficiently large pole surface, so as to meet the needs of the relay for installation and use in a small space.

[0004] The technical solution adopted by the present invention to solve the technical problem is: a small relay that can be simplified in assembly, comprising a base, a coil frame, an iron core and a yoke; the coil frame comprises flanges at both ends, a winding window between the flanges at both ends and a through hole penetrating the flanges at both ends; the iron core and the yoke are respectively L-shaped; the coil frame is arranged horizontally; the horizontal side of the L-shaped iron core is inserted into the through hole of the coil frame from the outside of one of the flanges of the coil frame, the bottom of the vertical side of the L-shaped iron core is plugged and fixed on the base, and the L-shaped side of the iron core is inserted into the through hole of the coil frame. The portion of the vertical side of the L-shaped iron frame exposed outside one of the flanges of the coil frame is set as the pole surface of the iron core to cooperate with the armature of the relay; the horizontal side of the yoke iron is matched on the top of the coil frame and pressed on the flanges at both ends of the coil frame respectively, the vertical side of the yoke iron passes through the slot provided on the other flange of the coil frame and contacts with the end of the horizontal side of the L-shaped iron core, and the bottom of the vertical side of the yoke iron is plugged and fixed on the base; the coil frame is fixed to the base through the iron core and the yoke iron.

[0005] The end of the L-shaped horizontal side of the iron core has an extended section relative to the through hole of the coil frame, and the vertical side of the yoke is provided with a slot extending upward from the bottom end so that the two sides of the slot form plug-in arms; the slots of the other flange of the coil frame are two and are respectively arranged on the two sides corresponding to the width of the vertical side of the yoke, and the two plug-in arms of the vertical side of the yoke respectively pass through the slots on the two sides of the other flange of the coil frame, and their bottoms are respectively plugged and fixed on the base; the upper wall of the slot on the vertical side of the yoke is in contact with the extended section at the end of the L-shaped horizontal side of the iron core.

[0006] Furthermore, a magnetic steel is clamped between the upper wall surface of the slot on the vertical side of the yoke and the upper surface of the extended section at the end of the L-shaped horizontal side of the iron core, so that the relay becomes a magnetic latching relay.

[0007] A magnetic steel fixing part is also installed at the place where a magnetic steel is clamped; the magnetic steel fixing part includes a sleeve part and a clamping part; the sleeve part is provided with a sleeve mouth matched with the cross-sectional size of the iron core, and the clamping part is provided with two clips; the magnetic steel fixing part is fixed to the protruding section at the end of the horizontal side of the L-shape of the iron core through the sleeve mouth, and the two clips of the magnetic steel fixing part are respectively against the left and right sides of the magnetic steel; the two ends of the head of the armature are respectively provided with hooks for hooking on the yoke outside the two side edges corresponding to the width of the reset spring.

[0008] The portion of the L-shaped vertical side of the iron core exposed outside one of the flanges of the coil frame also protrudes to both sides and is provided with protruding parts for enlarging the magnetic pole surface of the iron core.

[0009] The relay also includes a movable spring armature component, which includes a reset spring, a movable spring part and an armature; the reset spring is bent into an L-shape, one side of the L-shape of the reset spring is provided with a yoke connecting part for fixing to a horizontal side of the yoke, the other side of the L-shape of the reset spring is bent downward relative to the one side of the L-shape of the reset spring, the other side of the L-shape of the reset spring is fixed to the armature and the head of the armature is matched with the blade of the yoke; the movable spring part includes a bridge-type movable spring and a movable contact, two movable contacts are respectively fixed to the two ends of the bridge-type movable spring, and the middle of the bridge-type movable spring is fixed to the armature so that the two movable contacts are located outside the two sides of the armature.

[0010] The bridge-type movable spring piece is composed of a spring piece, and the reset spring piece and the bridge-type movable spring piece are an integrated structure. The bridge-type movable spring piece is located at the end of the other side of the L-shape of the reset spring piece, so that the reset spring piece and the bridge-type movable spring piece form a T-shaped movable spring component, and the movable spring component is fixed to the horizontal side of the yoke through the yoke connecting part of the L-shape of the reset spring piece and the other side of the L-shape of the reset spring piece of the movable spring component is fixed to the armature through the middle of the bridge-type movable spring piece.

[0011] The bridge-type moving spring piece is composed of a plurality of spring pieces stacked together; the plurality of spring pieces stacked together and the other side of the L-shape of the reset spring piece are riveted and fixed to the armature at the same position of the armature, so that the moving contacts at both ends of the bridge-type moving spring piece are located on opposite sides of the riveted position of the reset spring piece and the armature.

[0012] The other side of the L-shape of the reset spring is between the bridge-type movable spring and the armature; the multiple stacked springs are respectively provided with bending portions on the outer sides of both sides corresponding to the width of the corresponding parts of the other side of the L-shape of the reset spring, and the bending direction of the bending portions is toward the armature; the bending portions of the multiple springs are staggered, and the distance between the two bending portions of the multiple springs gradually increases in the direction away from the armature.

[0013] In the bridge type moving spring piece, a strip groove which does not connect the two moving contacts is provided between the two moving contacts.

[0014] Both ends of the head of the armature are provided with hooks for hanging on the yoke outside the two side edges corresponding to the width of the reset spring.

[0015] In one side of the L-shape of the reset spring, a middle slot is provided extending from the bend to the yoke connection part, and the middle slot gradually increases from the bend to the yoke connection part, so that the reset spring body parts on both sides of the middle slot gradually decrease from the bend to the yoke connection part.

[0016] Two moving contacts are connected to the two ends of the bridge-type moving spring respectively, and the four moving contacts are on the same straight line. A slit is provided between the two moving contacts at the same end of the bridge-type moving spring, one end of the slit passes through the bridge-type moving spring, and the other end of the slit extends toward the middle of the bridge-type moving spring, so that the two moving contacts at the same end of the bridge-type moving spring are in parallel relationship; the two slits extending toward the middle from the two ends of the bridge-type moving spring do not intersect in the middle, so that the moving contacts at the two ends of the bridge-type moving spring are connected in series.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. The present invention sets the iron core and the yoke to be L-shaped; the horizontal side of the L-shaped iron core is inserted into the through hole of the coil frame from the outside of one of the flanges of the coil frame, the bottom of the vertical side of the L-shaped iron core is plugged and fixed on the base, the horizontal side of the yoke is matched on the top of the coil frame and pressed on the two end flanges of the coil frame respectively, the vertical side of the yoke passes through the slot provided on the other flange of the coil frame and contacts with the end of the horizontal side of the L-shaped iron core, and the bottom of the vertical side of the yoke is plugged and fixed on the base; the coil frame is fixed to the base through the iron core and the yoke. In the structure of the present invention, the iron core is designed to be L-shaped, and the bottom of the vertical side of the L-shape of the iron core is fixed to the base, so that the iron core is fixed. The yoke passes through the slot of the coil frame and is fixedly matched with the base, so that during the assembly process of the magnetic circuit, there is no need to rivet the iron core and the yoke to achieve a closed magnetic circuit loop, and there is no need to fix and limit the coil frame, thereby simplifying the production process and improving product performance. Since most of the vertical side of the L-shape of the iron core is outside the coil frame, the area in contact with the armature is increased, thereby solving the problem of small pole surface on the basis of miniaturization.

[0019] 2. The present invention uses a magnetic steel clamped between the upper wall surface of the slot on the vertical side of the yoke and the upper surface of the extended section at the end of the L-shaped horizontal side of the iron core, so that the relay becomes a magnetic latching relay. In this structure of the present invention, since the iron core and the yoke are fixed by the base, that is, the yoke and the iron core are limited by the base, the magnetic steel can be clamped between the yoke and the iron core to fix the magnetic steel, so that the relay can be easily made into a magnetic latching relay.

[0020] 3. The present invention introduces a bridge-type moving spring piece into the snap-on moving spring armature component, and fixes the middle of the bridge-type moving spring piece on the armature so that the moving contacts at both ends of the bridge-type moving spring piece are located outside the armature on both sides. This structure of the present invention enables the contacts to be located on opposite sides of the armature, thereby reducing the height of the relay.

[0021] 4. The present invention adopts an integrated structure of the reset spring and the bridge-type movable spring, and the bridge-type movable spring is located at the end of the other side of the L-shaped reset spring, so that the reset spring and the bridge-type movable spring form a T-shaped movable spring component, and the movable spring component is fixed to the horizontal side of the yoke through the yoke connection part of the L-shaped side of the reset spring, and the other side of the L-shaped reset spring of the movable spring component is fixed to the armature through the middle of the bridge-type movable spring. This structure of the present invention can increase the distance from the contact to the riveting point, lengthen the effective length of the deformation of the movable spring, increase the swing force arm of the contact, and improve flexibility, thereby solving the problem of poor second suction or small overtravel caused by the short deformation length of the reset spring in a limited height space, and solving the flexibility and deformation length problems of the movable spring in the low height problem due to the transfer of the force arm from the longitudinal direction to the lateral direction.

[0022] 5. The present invention adopts a bridge-type movable spring piece composed of a plurality of stacked spring pieces, and the plurality of stacked spring pieces and the other side of the L-shape of the reset spring piece are riveted and fixed to the armature at the same position of the armature, so that the movable contacts at both ends of the bridge-type movable spring piece are located on the opposite sides of the riveted position of the reset spring piece and the armature; and the bridge-type movable spring piece is provided with bending portions on the outer sides of the two sides corresponding to the width of the corresponding part of the other side of the L-shape of the reset spring piece, and the bending portions of the plurality of spring pieces are staggered. The structure of the present invention can, on the one hand, achieve the same beneficial effect as the fourth point above, and on the other hand, can improve the load capacity by using a plurality of reeds. By staggering and bending the plurality of reeds, rebound caused by a heavy load and a strong magnetic attraction can be avoided. Compared with the existing conductive sheets, contact adhesion can be avoided under high current conditions, and contact disconnection is facilitated. At the same time, the contact pressure can be adjusted easily. Due to the heavy load, a plurality of reeds generate a lot of heat. By staggering and bending the plurality of reeds to form gaps, the heat of the reeds can be reduced by convection, thereby solving the problem of temperature rise.

[0023] 7. The present invention adopts a structure in which a slot that does not connect the two moving contacts is provided between the two moving contacts in the bridge-type moving reed. With this structure of the present invention, the two moving contacts form a shunt in the bridge-type moving reed, which can reduce the heat generated by the moving reed. The slot increases air convection, which can also reduce the heat of the moving reed, thereby solving the temperature rise problem. At the same time, this structure can also increase the reaction force of the moving reed.

[0024] 8. The present invention adopts a structure in which hooks are provided at both ends of the armature head corresponding to the width of the reset spring for hooking on the yoke of the relay. This structure of the present invention can improve the impact resistance of the relay and prevent the armature from rotating.

[0025] 9. The present invention adopts a middle slot extending from the bend to the yoke connection part in one side of the L-shaped reset spring, and the middle slot gradually increases from the bend to the yoke connection part, so that the reset spring body parts on both sides of the middle slot gradually decrease from the bend to the yoke connection part. This structure of the present invention can not only ensure the anti-drop strength of the relay, but also improve the flexibility of the spring and reduce the reaction force.

[0026] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, the small relay that can be assembled in a simplified manner of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the external structure of the first embodiment of the present invention;

[0028] Figure 2 is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention (excluding the housing);

[0029] Figure 3 is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention (without the housing and rotated at an angle);

[0030] Figure 4 It is a schematic diagram of the exploded three-dimensional structure of the first embodiment of the present invention (rotated at an angle);

[0031] Figure 5 It is a three-dimensional structural schematic diagram of the first embodiment of the present invention (without the housing and the movable spring armature component installed);

[0032] Figure 6 is along Figure 5 The cross-sectional view of line AA in the figure;

[0033] Figure 7 is a schematic diagram of the three-dimensional structure of the iron core of the first embodiment of the present invention;

[0034] Figure 8 is a three-dimensional structural schematic diagram of a movable spring armature component according to the first embodiment of the present invention;

[0035] Fig. 9 yes Figure 8 A magnified schematic diagram of part A in FIG.

[0036] Fig.10 1 is a schematic diagram of the three-dimensional structure of the movable spring armature component of the first embodiment of the present invention (the bottom is turned upside down);

[0037] Fig.11 yes Fig.10 A magnified schematic diagram of part B in FIG.

[0038] Fig.12is a side view of a movable spring armature component according to the first embodiment of the present invention;

[0039] Fig.13 is a schematic diagram of the exploded three-dimensional structure of the movable spring armature component of the first embodiment of the present invention;

[0040] Fig.14 1 is a schematic diagram of one of the bridge-type moving spring leaves of the moving spring armature component according to the first embodiment of the present invention;

[0041] Fig.15 1 is a schematic diagram of the structure of a return spring of a movable spring armature component according to the first embodiment of the present invention;

[0042] Fig.16 is a schematic diagram of the three-dimensional structure of the movable spring armature component of the second embodiment of the present invention;

[0043] Fig.17 1 is a schematic diagram of the three-dimensional structure of the movable spring armature component of the second embodiment of the present invention (rotated at an angle);

[0044] Fig.18 is a schematic diagram of the three-dimensional structure of the second embodiment of the present invention (excluding the housing);

[0045] Fig.19 is a schematic diagram of the three-dimensional structure of the third embodiment of the present invention (excluding the housing);

[0046] Fig. 20 It is a schematic diagram of the three-dimensional structure of the movable spring armature component (without movable contact) of the third embodiment of the present invention. DETAILED DESCRIPTION

[0047] Embodiment 1

[0048] See also Figures 1 to 15As shown, a small relay that can be simply assembled according to the present invention comprises a housing 10, a static spring 20, a base 1, a coil frame 2, an iron core 3 and a yoke 4; the coil frame 2 comprises flanges 21 and 22 at both ends, a winding window 23 between the flanges at both ends and a through hole 24 (i.e., an iron core mounting hole) penetrating the flanges at both ends; the iron core 3 and the yoke 4 are respectively L-shaped; the coil frame 2 is arranged horizontally; the L-shaped horizontal side 31 of the iron core 3 is inserted into the through hole 24 of the coil frame 2 from the outside of one of the flanges 21 of the coil frame, and the bottom of the L-shaped vertical side 32 of the iron core 3 is plugged and fixed on the base 1, and the L-shaped vertical side 32 of the iron core 3 is inserted and fixed on the base 1. The portion 33 of the vertical side 32 of the L-shaped coil exposed outside one of the flanges 21 of the coil frame is set as the pole surface of the iron core to cooperate with the armature of the relay; the horizontal side 41 of the yoke 4 is matched on the top of the coil frame 2 and pressed on the flanges 21 and 22 at both ends of the coil frame 2 respectively, the vertical side 42 of the yoke 4 passes through the slot 25 provided on the other flange 22 of the coil frame 2 and contacts with the end of the L-shaped horizontal side 31 of the iron core 3, and the bottom of the vertical side 42 of the yoke 4 is plugged and fixed on the base 1; the coil frame 2 is fixed to the base 1 through the iron core 3 and the yoke 4.

[0049] In this embodiment, the end of the L-shaped horizontal side 31 of the iron core 3 has an extended section 34 relative to the through hole 24 of the coil frame 2, and the vertical side 42 of the yoke 4 is provided with a slot 43 extending upward from the bottom end so that the two sides of the slot form a plug-in arm 44; the slot 25 of the other flange 22 of the coil frame 2 is two and is respectively arranged on both sides corresponding to the width of the vertical side 42 of the yoke 4, and the two plug-in arms 44 of the vertical side 42 of the yoke 4 respectively pass through the slots 25 on both sides of the other flange 22 of the coil frame 2, and the bottoms of the two plug-in arms 44 are respectively plugged and fixed on the base 1; the upper wall 431 of the slot 43 of the vertical side 42 of the yoke 4 is in contact with the extended section 34 at the end of the L-shaped horizontal side 31 of the iron core 3.

[0050] In this embodiment, further, a magnetic steel 40 is clamped between the upper wall surface 431 of the slot 43 of the vertical side 42 of the yoke 4 and the upper surface of the extended section 34 at the end of the L-shaped horizontal side 31 of the core 3, so that the relay becomes a magnetic latching relay. Of course, the magnetic steel may not be installed.

[0051] In this embodiment, a magnetic steel fixing part 5 is also installed at the place where a magnetic steel 40 is clamped; the magnetic steel fixing part 5 includes a sleeve portion 51 and a clamping portion 52; the sleeve portion 51 is provided with a sleeve mouth adapted to the cross-sectional size of the iron core 3, and the clamping portion 52 is provided with two clips; the magnetic steel fixing part 5 is fixed to the protruding section 34 at the end of the horizontal side 31 of the L-shaped iron core through the sleeve mouth, and the two clips of the magnetic steel fixing part 5 are respectively against the left and right sides of the magnetic steel 40.

[0052] In this embodiment, a portion 33 of an L-shaped vertical side 32 of the core 3 exposed outside one of the flanges of the coil frame is also provided with protruding portions 35 protruding toward both sides for enlarging the magnetic pole surface of the core.

[0053] In this embodiment, the relay also includes a movable spring armature component, which includes a reset spring 6, a movable spring part 7 and an armature 8; the reset spring 6 is bent into an L-shaped shape by a bending portion 61, and one side 62 of the L-shaped reset spring 6 is arranged approximately horizontally, and one side 62 of the L-shaped reset spring 6 is provided with a yoke connecting portion 621 for fixing to the horizontal side 41 of the yoke 4, and the other side 63 of the L-shaped reset spring 6 is bent downward relative to the one side 62 of the L-shaped reset spring, and the other side 63 of the L-shaped reset spring 6 is fixed to the armature 8 and makes the head 81 of the armature 8 fit at the edge of the yoke 4; the movable spring part 7 includes a bridge-type movable spring 71 and a movable contact 72, and the two movable contacts 72 are respectively fixed at the two ends of the bridge-type movable spring 71, and the middle of the bridge-type movable spring 71 is fixed on the armature 8 so that the two movable contacts 72 are located outside the two sides of the armature 8.

[0054] In this embodiment, the bridge-type moving spring 71 is composed of three stacked springs 711, 712, and 713; the three stacked springs 711, 712, and 713 and the other side 63 of the L-shape of the reset spring 6 are riveted and fixed to the armature 8 at the same position of the armature 8, so that the moving contacts 72 at both ends of the bridge-type moving spring 71 are located on opposite sides of the riveted position of the reset spring 6 and the armature 8.

[0055] In this embodiment, the armature 8 is provided with a convex bulge 82, and the bridge movable spring 71 and the other side 63 of the L-shape of the reset spring 6 are respectively provided with through holes 73 and 631, that is, the three springs 711, 712, and 713 are respectively provided with through holes 73, and the through holes 73 of the three springs 711, 712, and 713 and the through hole 631 of the other side 63 of the L-shape of the reset spring 6 are respectively matched at the convex bulge 82 of the armature 8 and the armature 8, the reset spring 6 and the bridge movable spring 71 are fixed together by riveting.

[0056] In this embodiment, the other side 63 of the L-shape of the reset spring 6 is located between the bridge-type movable spring 71 and the armature 8; the three stacked springs 711, 712, and 713 are respectively provided with bending portions 74 on the outer sides of the two sides corresponding to the width of the corresponding part of the other side 63 of the L-shape of the reset spring 6, and the bending direction of the bending portion 74 is toward the armature 8; the bending portions 74 of the three springs 711, 712, and 713 are staggered, and the distance between the two bending portions 74 of the three springs 711, 712, and 713 gradually increases in the direction away from the armature, thereby forming a certain gap between the springs at the position corresponding to the bending portion to facilitate heat dissipation. The shape of the bent portion 74 is roughly Z-shaped, the reed 711 is closest to the reset reed 6, the reed 711, the reed 712 and the reed 713 are stacked in sequence, the two bent portions 74 of the reed 711 are arranged on the outside of the width of the corresponding part of the other side 63 of the L-shaped reset reed 6, and the bend of the bent portion 74 of the reed 711 is close to the armature 8; the reed 712 is stacked outside the reed 711, and the two bent portions 74 of the reed 712 are stacked on the outside of the reed 711. The distance between the two bent portions 74 of the reed 711 is greater than the distance between the two bent portions 74 of the reed 711, and the bent portion of the bent portion 74 of the reed 712 is in contact with the reed 711; the reed 713 is stacked on the outside of the reed 712, and the distance between the two bent portions 74 of the reed 713 is greater than the distance between the two bent portions 74 of the reed 712, and the bent portion of the bent portion 74 of the reed 713 is in contact with the reed 712; in this way, a gap 75 is formed at the position of the bent portion 74.

[0057] In this embodiment, a bar groove 76 that does not connect the two moving contacts is further provided between the two moving contacts 72 in the bridge type moving reed 71. Since the bridge type moving reed 71 is composed of three reeds 711, 712, and 713 stacked together, the reed 711, the reed 712, and the reed 713 are all provided with a bar groove 76. In this embodiment, the bar groove 76 is one, and the bar groove 76 can be provided as a plurality of bars according to the need for balancing the suction and reaction forces.

[0058] In this embodiment, hooks 83 for hooking onto the yoke of the relay are respectively provided at both ends of the head of the armature 8 outside the two side edges corresponding to the width of the reset spring 6 .

[0059] In this embodiment, an intermediate slot 64 is provided in one side 62 of the L-shape of the reset spring 6, extending from the bending portion 61 toward the yoke connecting portion 621, and the intermediate slot 64 gradually increases from the bending portion 61 toward the yoke connecting portion 621, so that the reset spring body portion 65 on both sides of the intermediate slot gradually decreases from the bending portion 61 toward the yoke connecting portion 621.

[0060] A small relay that can be simply assembled according to the present invention adopts the method of setting the iron core 3 and the yoke 4 to be both L-shaped; inserting the L-shaped horizontal side 31 of the iron core 3 into the through hole 24 of the coil frame 2 from the outside of one of the flanges 21 of the coil frame 2, plugging and fixing the bottom of the L-shaped vertical side 32 of the iron core on the base 1, fitting the horizontal side 41 of the yoke 4 on the top of the coil frame 2 and pressing on the flanges 21 and 22 at both ends of the coil frame 2 respectively, allowing the vertical side 42 of the yoke 4 to pass through the slot 25 provided on the other flange 22 of the coil frame 2 and contact with the end of the L-shaped horizontal side 31 of the iron core 3, and plugging and fixing the bottom of the vertical side 42 of the yoke 4 on the base 1; the coil frame 2 is fixed to the base 1 through the iron core 3 and the yoke 4. In the structure of the present invention, the core 3 is designed to be L-shaped, and the bottom of the vertical side 32 of the L-shape of the core 3 is fixed to the base 1, so that the core 3 is fixed. The yoke 4 passes through the slot 25 of the coil frame 2 and is fixedly matched with the base 1, so that during the assembly process of the magnetic circuit, there is no need to rivet the core and the yoke to achieve a closed magnetic circuit loop, and there is no need to fix and limit the coil frame, which simplifies the production process and improves product performance. Since most of the vertical side of the L-shape of the core is outside the coil frame, the area in contact with the armature is increased, thereby solving the problem of small pole surface on the basis of miniaturization.

[0061] The present invention is a small relay that can be assembled in a simplified manner. A magnetic steel 40 is clamped between the upper wall surface 431 of the slot 43 of the vertical side 42 of the yoke 4 and the upper surface of the extended section 34 at the end of the L-shaped horizontal side 31 of the core 3, so that the relay becomes a magnetic latching relay. In this structure of the present invention, since the core 3 and the yoke 4 are both fixed by the base 1, that is, the yoke 4 and the core 3 are both limited by the base 1, the magnetic steel 40 can be clamped between the yoke 4 and the core 3, so that the magnetic steel 40 is fixed, so that the relay can be easily made into a magnetic latching relay.

[0062] The present invention is a small relay that can be assembled in a simplified manner. A bridge-type dynamic spring piece 71 is introduced into a snap-on dynamic spring armature component, and the middle of the bridge-type dynamic spring piece 71 is fixed to the armature 8 so that the dynamic contacts 72 at both ends of the bridge-type dynamic spring piece 71 are located outside the armature 8 on both sides. This structure of the present invention allows the contacts to be located on opposite sides of the armature, thereby reducing the height of the relay.

[0063] The present invention is a small relay that can be assembled in a simplified manner. The bridge-type moving spring 71 is composed of three stacked springs 711, 712, and 713. The three stacked springs 711, 712, and 713 are riveted and fixed to the armature 8 at the same position of the armature 8 as the other side 63 of the L-shape of the reset spring 6, so that the moving contacts 72 at both ends of the bridge-type moving spring 71 are located on opposite sides of the riveted position between the reset spring 6 and the armature 8; and the bridge-type moving spring 71 is provided with bending portions 74 on the outer sides of the two sides corresponding to the width of the corresponding part of the other side 63 of the L-shape of the reset spring 6, and the bending portions 74 of the three springs are staggered. The structure of the present invention, on the one hand, can increase the distance from the contact to the riveting point, lengthen the effective length of the deformation of the movable spring, increase the contact swing force arm, and improve the flexibility, thereby solving the problem of poor secondary suction or small overtravel due to the short deformation length of the reset spring in a limited height space, and solving the flexibility and deformation length problems of the movable spring in the low height problem due to the transfer of the force arm from the longitudinal direction to the lateral direction; on the other hand, the load capacity can be improved by using multiple springs, and the multiple springs can be staggered and bent to avoid rebound caused by heavy load and strong magnetic attraction. Compared with the existing conductive sheets, contact adhesion can be avoided under high current conditions and easy to disconnect; at the same time, it is convenient to adjust the contact pressure; multiple springs generate a lot of heat due to the heavy load, and gaps are formed by staggered bending of multiple springs, and the heat of the springs can be reduced by convection, thereby solving the temperature rise problem.

[0064] The present invention is a small relay that can be assembled in a simplified manner. In the bridge-type moving reed 71, a slot 76 that does not connect the two moving contacts 72 is provided. In this structure of the present invention, the two moving contacts form a shunt in the bridge-type moving reed, which can reduce the heat generated by the moving reed. Since the slot increases air convection, the heat of the moving reed is reduced, thereby solving the temperature rise problem. At the same time, this structure can also increase the reaction force of the moving reed.

[0065] The present invention is a small relay that can be assembled in a simplified manner, wherein hooks 83 for hooking on the yoke of the relay are provided at both ends of the head 81 of the armature 8 on the two sides corresponding to the width of the reset spring. This structure of the present invention can improve the impact resistance of the relay and prevent the armature from rotating.

[0066] The present invention is a small relay that can be assembled in a simplified manner. The L-shaped side 62 of the reset spring 6 is provided with a middle slot 64 extending from the bend to the yoke connection part 621, and the middle slot 64 gradually increases from the bend to the yoke connection part 621, so that the reset spring body parts 65 on both sides of the middle slot 64 gradually decrease from the bend to the yoke connection part. This structure of the present invention can not only ensure the anti-drop strength of the relay, but also improve the flexibility of the spring and reduce the reaction force.

[0067] Embodiment 2

[0068] See also Figures 16 to 18 As shown, a small relay that can be simplified in assembly of the present invention is different from the first embodiment in that the reset spring piece 6 and the bridge type movable spring piece 71 are an integrated structure, and the bridge type movable spring piece 71 is located at the end of the other side 63 of the L-shaped reset spring piece 6, so that the reset spring piece 6 and the bridge type movable spring piece 71 form a T-shaped movable spring component 70. In this way, the bridge type movable spring piece 71 is only one piece. In order to improve the current carrying capacity of the movable spring, in this embodiment, a current-carrying copper wire 77 is further connected to the back of the bridge type movable spring piece 71 corresponding to the movable contact 72, and the two ends of the current-carrying copper wire 77 are respectively connected to the backs of the two movable contacts 72; the movable spring component 70 is fixed to the yoke 4 through the yoke connecting portion 621 of the L-shaped side 62 of the reset spring piece 6, and the other side 63 of the L-shaped reset spring piece of the movable spring component 70 is fixed to the armature 8 through the middle of the bridge type movable spring piece 71.

[0069] The invention discloses a small relay which can be assembled in a simplified manner, which can increase the distance between the contact and the riveting point, lengthen the effective deformation length of the movable spring, increase the swing force arm of the contact, and improve the flexibility, thereby solving the problem that the reset spring has a short deformation length in a limited height space, resulting in poor secondary suction or a small overtravel, and solving the problem of flexibility and deformation length of the movable spring in the low height problem due to the force arm being transferred from the longitudinal direction to the lateral direction.

[0070] Embodiment 3

[0071] See also Figure 19 to Figure 20As shown, a small relay that can be simplified in assembly of the present invention is different from the first embodiment in that two ends of the bridge-type movable spring piece 71 are respectively connected to two movable contacts 72, and the four movable contacts 72 are all on the same straight line. A slit 78 is further provided between the two movable contacts 72 at the same end of the bridge-type movable spring piece 71, one end of the slit 78 passes through the bridge-type movable spring piece 71, and the other end of the slit 78 extends toward the middle of the bridge-type movable spring piece 71, so that the two movable contacts 72 at the same end of the bridge-type movable spring piece 71 are in parallel relationship; the two slits 78 extending toward the middle from the two ends of the bridge-type movable spring piece 71 do not intersect in the middle, so that the movable contacts 72 at the two ends of the bridge-type movable spring piece 71 are connected in series.

[0072] The present invention provides a small relay that can be assembled in a simplified manner. Two moving contacts 72 on one side are connected in parallel to achieve a shunting effect and reduce the contact resistance. The moving contacts 72 on the left and right sides are connected in series, and the equivalent contact resistance of the four moving contacts 72 is equal to the contact resistance of one moving contact. The two moving contacts 72 on one side are connected in parallel to achieve shunting, reduce temperature rise, and thus reduce contact loss and extend contact life; it is beneficial to arc breaking, so the contact gap can be reduced, the coil suction requirement can be reduced, and the coil ampere-turn value can be reduced.

[0073] 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 a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with the art can make many possible changes and modifications to the technical solution of the present invention by using the technical content disclosed above, or modify it into an equivalent equivalent embodiment without departing from the scope of the technical solution of the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to 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 small relay that can be simplified in assembly, comprising a base, a coil frame, an iron core and a yoke; the coil frame comprises flanges at both ends, a winding window between the flanges at both ends and a through hole penetrating the flanges at both ends; characterized in that: The iron core and the yoke are respectively L-shaped; the coil frame is arranged horizontally; the horizontal side of the L-shape of the iron core is inserted into the through hole of the coil frame from the outside of one of the flanges of the coil frame, and the bottom of the vertical side of the L-shape of the iron core is plugged and fixed on the base, and the part of the vertical side of the L-shape of the iron core exposed outside one of the flanges of the coil frame is set as the pole surface of the iron core to cooperate with the armature of the relay; the horizontal side of the yoke is matched on the top of the coil frame and pressed on the two end flanges of the coil frame respectively, the vertical side of the yoke passes through the slot provided on the other flange of the coil frame and contacts with the end of the horizontal side of the L-shape of the iron core, and the bottom of the vertical side of the yoke is plugged and fixed on the base; the coil frame is fixed to the base through the iron core and the yoke.

2. The small relay capable of simplified assembly according to claim 1, characterized in that: The end of the L-shaped horizontal side of the iron core has an extended section relative to the through hole of the coil frame, and the vertical side of the yoke is provided with a slot extending upward from the bottom end so that the two sides of the slot form plug-in arms; the slots of the other flange of the coil frame are two and are respectively arranged on the two sides corresponding to the width of the vertical side of the yoke, and the two plug-in arms of the vertical side of the yoke respectively pass through the slots on the two sides of the other flange of the coil frame, and their bottoms are respectively plugged and fixed on the base; the upper wall of the slot on the vertical side of the yoke is in contact with the extended section at the end of the L-shaped horizontal side of the iron core.

3. The small relay capable of simplified assembly according to claim 2, characterized in that: Furthermore, a magnetic steel is clamped between the upper wall surface of the slot on the vertical side of the yoke and the upper surface of the extended section at the end of the L-shaped horizontal side of the iron core, so that the relay becomes a magnetic latching relay.

4. The small relay capable of simplified assembly according to claim 3, characterized in that: A magnetic steel fixing part is also installed at the place where a magnetic steel is clamped; the magnetic steel fixing part includes a sleeve part and a clamping part; the sleeve part is provided with a sleeve mouth matched with the cross-sectional size of the iron core, and the clamping part is provided with two clips; the magnetic steel fixing part is fixed to the protruding section at the end of the horizontal side of the L-shape of the iron core through the sleeve mouth, and the two clips of the magnetic steel fixing part are respectively against the left and right sides of the magnetic steel.

5. The small relay capable of simplified assembly according to claim 1, characterized in that: The portion of the L-shaped vertical side of the iron core exposed outside one of the flanges of the coil frame also protrudes to both sides and is provided with protruding parts for enlarging the magnetic pole surface of the iron core.

6. The small relay capable of simplified assembly according to any one of claims 1 to 5, characterized in that: The relay also includes a movable spring armature component, which includes a reset spring, a movable spring part and an armature; the reset spring is bent into an L-shape, one side of the L-shape of the reset spring is provided with a yoke connecting part for fixing with a horizontal side of the yoke, the other side of the L-shape of the reset spring is bent downward relative to the one side of the L-shape of the reset spring, the other side of the L-shape of the reset spring is fixed with the armature and the head of the armature is matched with the edge of the yoke; the movable spring part includes a bridge-type movable spring and a movable contact, two movable contacts are respectively fixed at the two ends of the bridge-type movable spring, the middle of the bridge-type movable spring is fixed on the armature so that the two movable contacts are located outside the two sides of the armature; the two ends of the head of the armature are respectively provided with hooks for hooking on the yoke outside the two side edges corresponding to the width of the reset spring.

7. The small relay capable of simplified assembly according to claim 6, characterized in that: The bridge-type movable spring piece is composed of a spring piece, and the reset spring piece and the bridge-type movable spring piece are an integrated structure. The bridge-type movable spring piece is located at the end of the other side of the L-shape of the reset spring piece, so that the reset spring piece and the bridge-type movable spring piece form a T-shaped movable spring component, and the movable spring component is fixed to the horizontal side of the yoke through the yoke connecting part of the L-shape of the reset spring piece and the other side of the L-shape of the reset spring piece of the movable spring component is fixed to the armature through the middle of the bridge-type movable spring piece.

8. The small relay capable of simplified assembly according to claim 6, characterized in that: The bridge-type moving spring piece is composed of a plurality of spring pieces stacked together; the plurality of spring pieces stacked together and the other side of the L-shape of the reset spring piece are riveted and fixed to the armature at the same position of the armature, so that the moving contacts at both ends of the bridge-type moving spring piece are located on opposite sides of the riveted position of the reset spring piece and the armature.

9. The small relay capable of simplified assembly according to claim 8, characterized in that: The other side of the L-shape of the reset spring is between the bridge-type movable spring and the armature; the multiple stacked springs are provided with bending portions on the outer sides of both sides corresponding to the width of the corresponding parts of the other side of the L-shape of the reset spring, and the bending direction of the bending portions is toward the armature; the bending portions of the multiple stacked springs are staggered, and the distance between the two bending portions of the multiple stacked springs gradually increases in the direction away from the armature.

10. The small relay capable of simplified assembly according to claim 6, characterized in that: In the bridge type moving spring piece, a strip groove which does not connect the two moving contacts is provided between the two moving contacts.

11. The small relay capable of simplified assembly according to claim 6, characterized in that: In one side of the L-shape of the reset spring, a middle slot is provided extending from the bend to the yoke connection part, and the middle slot gradually increases from the bend to the yoke connection part, so that the reset spring body parts on both sides of the middle slot gradually decrease from the bend to the yoke connection part.

12. The small relay capable of simplified assembly according to claim 6, characterized in that: Two moving contacts are connected to the two ends of the bridge-type moving spring respectively, and the four moving contacts are on the same straight line. A slit is provided between the two moving contacts at the same end of the bridge-type moving spring, one end of the slit passes through the bridge-type moving spring, and the other end of the slit extends toward the middle of the bridge-type moving spring, so that the two moving contacts at the same end of the bridge-type moving spring are in parallel relationship; the two slits extending toward the middle from the two ends of the bridge-type moving spring do not intersect in the middle, so that the moving contacts at the two ends of the bridge-type moving spring are connected in series.

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