An electromagnetic relay

Abstract

The application discloses an electromagnetic relay, which comprises a shell, a magnetic circuit assembly, a push rod, a base, a contact assembly and a bottom cover, the magnetic circuit assembly, the push rod, the base and the contact assembly are located in the shell, the bottom cover covers the open end of the shell, the armature in the magnetic circuit assembly is linked and matched with the moving spring component of the contact assembly through the push rod, wherein the base has opposite first and second sides, the contact assembly and the bottom cover are arranged on the first side of the base, the end pin of the contact assembly penetrates through the bottom cover and is exposed outward, the push rod is slidably arranged on the second side of the base along the length direction, the magnetic circuit assembly is arranged on the second side of the base, and the push rod is located between the second side of the base and the magnetic circuit assembly. The electromagnetic relay provided by the application has compact and simple overall structure, is easy to install and is beneficial to reducing the size of the relay.

Description

Technical Field

[0001] This invention relates to the field of electromagnetic relay technology, and more particularly to an electromagnetic relay. Background Technology

[0002] Chinese patent CN202110697109.5 discloses an electromagnetic relay, including a body, a magnetic circuit portion, a contact portion, and a pusher. The body includes an upper shell and a base, with the base having a retaining wall located between the moving spring portion and the magnetic circuit portion. The magnetic circuit portion is horizontally mounted on the right side of the retaining wall of the base, and the contact portion is vertically mounted on the left side of the retaining wall of the base. The end of the contact portion needs to extend downwards through the bottom surface of the base and protrude downwards. The pusher is located outside the moving spring portion. Analysis reveals the following technical problems:

[0003] (1) Assembly troublesome: During assembly, the contact part needs to be installed on the base first, and then the push card and magnetic circuit part are installed. Since the base is an integral structure and the contact part is arranged vertically, the contact part needs to be installed on the right side of the base wall and pass through the bottom surface of the base. Therefore, the end foot groove recessed from the side can only be set on the bottom surface of the base. The moving spring part and the stationary spring part are installed by horizontal insertion. This will cause the base structure to be complicated and the strength to be reduced. Moreover, the moving spring lead-out piece of the moving spring part needs to be set long enough to reach the end foot groove, which consumes a lot of material. At the same time, since the push card is installed on the outside of the moving spring part, when installing the push card, each first card slot of the push card needs to be aligned with the moving spring part of each contact part at the same time. Alignment is difficult, and complex auxiliary fixtures need to be assembled, which is inefficient and has high assembly labor and equipment costs.

[0004] (2) Large size: The base needs to leave enough thickness space on the outside of the moving spring part to accommodate the push card. Moreover, the first and second card slots in the push card are set on the same side, which will cause the push card to be too long and compress the arrangement space of the moving spring part. The overall size of the electromagnetic relay is large and the space utilization rate is low. Summary of the Invention

[0005] In order to overcome at least one of the defects described in the prior art, the present invention provides an electromagnetic relay with a compact and simple overall structure, which is easy to install and helps to reduce the size of the relay.

[0006] The technical solution adopted by this invention to solve its problem is:

[0007] An electromagnetic relay, comprising:

[0008] The system comprises a housing, a magnetic circuit assembly, a push rod, a base, a contact assembly, and a bottom cover. The magnetic circuit assembly, push rod, base, and contact assembly are all located within the housing. The bottom cover closes to the opening of the housing. The armature in the magnetic circuit assembly is linked to the moving spring component of the contact assembly via the push rod.

[0009] The base has a first side and a second side. The contact assembly and the bottom cover are both located on the first side of the base. The end of the contact assembly protrudes outward through the bottom cover. The push rod slides along its length on the second side of the base. The magnetic circuit assembly is located on the second side of the base, and the push rod is located between the second side of the base and the magnetic circuit assembly.

[0010] The electromagnetic relay provided by this invention has a push rod and a contact assembly respectively located on two opposite sides of a base. The end of the contact assembly protrudes outward through the bottom cover. The push rod is located between the second side of the base and the magnetic circuit assembly, thereby arranging the magnetic circuit assembly, push rod, base, contact assembly, and bottom cover in sequence. The space between the base and the magnetic circuit assembly is used to accommodate the push rod. In specific assembly, the push rod can be installed on the base first, and then the magnetic circuit assembly and contact assembly can be installed on the base respectively with the push rod as the alignment reference. The armature in the magnetic circuit assembly and the moving spring component of the contact assembly are linked to the push rod respectively. Then, the bottom cover is aligned with the end of the contact assembly and installed on the first side of the base. Finally, the outer shell is installed. The overall structure is compact, simple, and easy to install, which helps to reduce the size of the relay.

[0011] Furthermore, a push rod movement groove is provided on the second side of the base, and a through-hole is provided on the push rod movement groove through the two opposite sides of the base. The push rod slides in the push rod movement groove, and an insertion groove and a first locking groove are provided on the two opposite sides of the push rod, respectively. The insertion groove cooperates with the extension rib of the armature, and the first locking groove passes through the through-hole and cooperates with the moving spring component of the contact assembly.

[0012] Furthermore, two stops are provided on the side of the push rod away from the contact assembly. The two stops are arranged at intervals along the length of the push rod, and the two stops form two side walls extending into the groove.

[0013] Furthermore, a partition block is provided between the two stops, which divides the insertion groove into two sub-grooves. There are two protruding ribs, and different protruding ribs are rotatably set in different sub-grooves.

[0014] Furthermore, at least one block has a reinforcing section on its outer side.

[0015] Furthermore, the second side of the base is also provided with an elastic buckle located on the side of the push rod movement groove. The elastic buckle engages with the push rod to restrict the push rod on the push rod movement groove.

[0016] Furthermore, the push rod is provided with a first protruding rib for abutting against the elastic buckle; and / or, the push rod is provided with a second protruding rib for abutting against the bottom surface of the push rod movement groove.

[0017] Furthermore, the first rib and / or the second rib extend along the width direction of the push rod.

[0018] Furthermore, the moving spring component includes a moving spring body, a moving contact, and a pressure spring. The moving contact and the pressure spring are respectively located on two opposite sides of the moving spring body. The pressure spring includes a fixed part, a connecting part, and a deformable part connected in sequence. The fixed part is connected to the moving spring body. The deformable part maintains a distance from the moving spring body, and the cross-section of the deformable part gradually decreases in the direction away from the connecting part. The side of the moving spring body facing away from the pressure spring abuts against one side wall of the first locking groove of the push rod, and the pressure spring abuts against the other side wall of the first locking groove of the push rod.

[0019] Furthermore, the moving spring body is provided with a first riveting hole, the fixed part is provided with a second riveting hole, and the moving contact is provided with a riveting post, which passes through the first riveting hole and the second riveting hole in sequence.

[0020] In summary, the electromagnetic relay provided by this invention has the following technical effects:

[0021] 1) The push rod and contact assembly are respectively located on two opposite sides of the base. The end of the contact assembly protrudes outward through the bottom cover. The push rod is located between the second side of the base and the magnetic circuit assembly. Thus, the magnetic circuit assembly, push rod, base, contact assembly and bottom cover are arranged in sequence. The space between the base and the magnetic circuit assembly is used to accommodate the push rod. In specific assembly, the push rod can be installed on the base first. Then, the magnetic circuit assembly and contact assembly are installed on the base respectively with the push rod as the alignment reference. The armature in the magnetic circuit assembly and the moving spring component of the contact assembly are linked to the push rod respectively. Then, the bottom cover is aligned with the end of the contact assembly and installed on the first side of the base. Finally, the outer shell is installed. The overall structure is compact, simple and easy to install, which helps to reduce the size of the relay.

[0022] 2) By placing the insertion slot and the first snap-fit ​​slot on opposite sides of the push rod, the arrangement of the first snap-fit ​​slot will not be affected by the insertion slot. The entire length of the push rod can be fully utilized to arrange the first snap-fit ​​slot, resulting in high length space utilization. Moreover, the armature will not interfere or obstruct the moving spring component, ensuring that the moving spring component has sufficient stroke and reducing the length of the relay.

[0023] 3) By setting push rod movement groove and elastic buckle on the base, during assembly, the push rod pushes open the elastic buckle from top to bottom and enters the push rod movement groove. Then the elastic buckle resets and locks onto the upper side of the push rod, thereby realizing the assembly of the push rod on the base. The overall assembly has fewer parts, which can effectively simplify the assembly process and reduce the overall production cost.

[0024] 4) By setting the first and second ribs in the push rod and further forming a line-surface contact, the friction of the push rod during its movement in the base can be reduced, the life of the push rod can be improved, and the falling of plastic debris can be reduced.

[0025] 5) By gradually reducing the cross-section of the deformation part, the deformation of the deformation part can generate an elastic force that changes in a roughly curved manner (from small to large). This means that the armature needs to overcome a smaller elastic force of the deformation part in the initial stage, while the deformation part can provide a larger contact pressure after the armature is fully attracted. In this way, the electromagnetic relay can improve the contact pressure by using the shape of the deformation part under normal attraction, thereby improving its short-circuit resistance and improving the consistency of contact.

[0026] 6) The riveting pins pass through the first riveting hole and the second riveting hole in sequence, so that the moving contact and the pressure spring are riveted together to the moving spring body, thereby saving costs and simplifying the production process. Attached Figure Description

[0027] Figure 1 This is an exploded view of the electromagnetic relay according to an embodiment of the present invention;

[0028] Figure 2 This is a schematic diagram of the connection between the push rod, base, and contact assembly in an embodiment of the present invention;

[0029] Figure 3 for Figure 2 One of the exploded schematic diagrams showing the connection between the push rod, base, and contact assembly;

[0030] Figure 4 for Figure 2 The second exploded view showing the connection between the push rod, base, and contact assembly;

[0031] Figure 5 This is a schematic diagram of the push rod structure according to an embodiment of the present invention;

[0032] Figure 6 This is a cross-sectional schematic diagram showing the connection between the push rod and the base in an embodiment of the present invention;

[0033] Figure 7 A schematic diagram of the structure of the moving spring component in an embodiment of the invention;

[0034] Figure 8 An exploded view of the moving spring component according to an embodiment of the invention;

[0035] Figure 9 A schematic diagram of the structure of the pressure spring in an embodiment of the invention;

[0036] Figure 10 for Figure 2 The diagram shows a bottom view of the connection between the push rod, base, and contact assembly.

[0037] The meanings of the reference numerals in the attached figures are as follows:

[0038] 1. Outer shell; 2. Magnetic circuit assembly; 21. Armature; 211. Extending rib; 3. Push rod; 301. Insertion groove; 302. First locking groove; 303. Second locking groove; 304. Clearance groove; 31. Stop block; 32. Separator block; 33. Armature positioning protrusion; 34. Reinforcing part; 341. Vertical rib; 342. Diagonal rib; 35. Horizontal rib; 36. Drive block; 37. First protruding rib; 38. Second protruding rib; 4. Base; 41. Push rod movement groove; 42. Through opening; 43. Elastic buckle; 44. Crossbeam; 45. First locking groove; 46. First extension block; 461. Second locking groove; 47. Second extension block; 471. Third locking groove; 48. Shaft hole; 5. Contact assembly; 51. Moving spring component; 511. Moving spring body; 5111. First connecting lug; 5112. First through hole; 5113. First riveting hole; 5114. First protrusion; 512. Moving contact; 5121. Riveting post; 513. Pressure spring; 5131. Fixing part; 5132. Connecting part; 5133. Deformation part; 5134. Second riveting hole; 514. Moving spring lead-out piece; 5141. Second connecting lug; 5142. Second through hole; 5143. Second protrusion; 515. Flexible connector; 516. Rotating shaft; 52. Stationary spring component; 53. Auxiliary moving spring piece; 54. Auxiliary stationary spring piece; 6. Bottom cover; 61. End foot through hole. Detailed Implementation

[0039] To better understand and implement this invention, the technical solutions in the embodiments of this invention will be clearly and completely described below with reference to the accompanying drawings.

[0040] In the description of this invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0042] See Figure 1The present invention discloses an electromagnetic relay, which includes a housing 1, a magnetic circuit assembly 2, a push rod 3, a base 4, a contact assembly 5, and a bottom cover 6. The magnetic circuit assembly 2, the push rod 3, the base 4, and the contact assembly 5 are all located inside the housing 1, and the bottom cover 6 covers the opening end of the housing 1.

[0043] by Figure 1 The directions shown are for reference only. Specifically, the base 4 serves as a support member and has a first side and a second side (in this case, the first side of the base 4 is the lower side of the base 4, and the second side of the base 4 is the upper side of the base 4). The magnetic circuit assembly 2 and the push rod 3 are installed on the upper side of the base 4, and the contact assembly 5 and the bottom cover 6 are installed on the lower side of the base 4. The magnetic circuit assembly 2 includes a coil assembly, a yoke, a spring, and an armature 21. The coil assembly is horizontally placed, and the yoke is connected below the coil assembly and inserted into the base 4. The armature 21 is laterally swayable and is located at the knife edge on the left side of the yoke. The spring is connected between the yoke and the armature 21 to provide a restoring force for the armature 21. The armature 21 cooperates with the push rod 3. In particular, the protruding rib 211 of the armature 21 extends downward and inserts into the insertion groove 3 of the push rod 3. In section 01, push rod 3 is also horizontally positioned and slides along its length on base 4. Push rod 3 is located between base 4 and magnetic circuit assembly 2. Push rod 3 is also provided with four first engaging slots 302, which are arranged along the length of push rod 3. Among them, the insertion slot 301 is located on the upper side of push rod 3, and the first engaging slots 302 are located on the lower side of push rod 3. There are four contact assemblies 5, which are also arranged along the length of push rod 3. The contact assembly 5 includes a moving spring component 51 and a stationary spring component 52. Each moving spring component 51 engages with a first engaging slot 302, thus realizing the linkage between armature 21, push rod 3 and moving spring component 51. The ends of coil assembly and contact assembly 5 can be exposed through bottom cover 6. When the coil assembly is energized, the armature 21 swings counterclockwise relative to the yoke. Through the engagement of the protruding rib 211 and the insertion slot 301, the armature 21 swings, driving the push rod 3 to slide to the left. The push rod 3 slides and, using the four first engaging slots 302, synchronously drives the four moving spring components 51 toward the stationary spring component 52, thus making the moving and stationary contacts contact. In addition, the push rod 3 may also be provided with a second engaging slot 303, which can be used to engage with the auxiliary moving spring 53, thereby synchronously driving the auxiliary moving spring 53 toward or away from the auxiliary stationary spring 54 through the push rod 3. The second engaging slot 303 and the first engaging slot 302 are located on the same side of the push rod 3.

[0044] It should be noted that the number of contact components 5 and the first locking slot 302 can also be two, three, five, etc. The present invention does not limit the specific number of contact components 5 and the first locking slot 302, as long as the moving spring component 51 of the contact component 5 and the first locking slot 302 correspond one-to-one.

[0045] As can be seen from the above scheme, the magnetic circuit assembly 2, push rod 3, base 4, contact assembly 5 and bottom cover 6 are arranged sequentially from top to bottom, and then installed into the outer shell 1.

[0046] The electromagnetic relay provided by this invention has a push rod 3 and a contact assembly 5 respectively located on two opposite sides of a base 4. The end of the contact assembly 5 protrudes outward through the bottom cover 6. The push rod 3 is located between the second side of the base 4 and the magnetic circuit assembly 2, thereby arranging the magnetic circuit assembly 2, push rod 3, base 4, contact assembly 5 and bottom cover 6 in sequence. The space between the base 4 and the magnetic circuit assembly 2 is used to accommodate the push rod 3. In specific assembly, the push rod 3 can be installed on the base 4 first, and then the magnetic circuit assembly 2 and contact assembly 5 can be installed on the base 4 respectively with the push rod 3 as the alignment reference. The armature 21 in the magnetic circuit assembly 2 and the moving spring component 51 of the contact assembly 5 are linked to the push rod 3 respectively. Then, the bottom cover 6 is aligned with the end of the contact assembly 5 and installed on the first side of the base 4. Finally, the outer shell 1 is installed. The overall structure is compact, simple and easy to install, which helps to reduce the size of the relay.

[0047] See Figure 4 and Figure 5 In this embodiment, the insertion groove 301 and the first snap-fit ​​groove 302 are located on two opposite sides of the push rod 3. Specifically, the insertion groove 301 is located on the upper side of the push rod 3, and the first snap-fit ​​groove 302 is located on the lower side of the push rod 3. The lower side of the push rod 3 may also be provided with a second snap-fit ​​groove 303 and two clearance grooves 304.

[0048] Thus, in the above scheme, by placing the insertion slot 301 and the first snap-fit ​​slot 302 on opposite sides of the push rod 3, the arrangement of the first snap-fit ​​slot 302 will not be affected by the insertion slot 301. The entire length of the push rod 3 can be fully utilized to arrange the first snap-fit ​​slot 302, resulting in high length space utilization. Moreover, when applied to an electromagnetic relay, the armature 21 will not interfere or obstruct the moving spring component 51, ensuring that the moving spring component 51 has sufficient stroke and reducing the length of the relay.

[0049] Preferably, in order to make better use of the entire length space of the push rod 3, in this embodiment, along the length direction of the push rod 3, the position of the insertion groove 301 is between the two first locking grooves 302 or the position of the insertion groove 301 corresponds to the position of one of the first locking grooves 302.

[0050] Combination Figure 1 Specifically, there are two protruding ribs 211, and the insertion groove 301 includes two isolated sub-grooves. Different protruding ribs 211 are rotatably set in different sub-grooves, thereby avoiding or reducing the movement of the armature 21 on the insertion groove 301.

[0051] Specifically, the push rod 3 is provided with a stop block 31, a separator block 32, an armature positioning protrusion 33, a reinforcing part 34, a horizontal rib 35, a drive block 36, a first rib 37, and a second rib 38.

[0052] by Figure 5 With the indicated direction as a reference, the stop block 31, the partition block 32, the reinforcing part 34, the horizontal rib 35 and the first convex rib 37 are all located on the upper side of the push rod 3, the driving block 36 and the second convex rib 38 are located on the lower side of the push rod 3, and the first locking groove 302, the second locking groove 303 and the clearance groove 304 are all located on the driving block 36. Thus, the stop block 31, the partition block 32, the reinforcing part 34, the horizontal rib 35 and the first convex rib 37 are all located on the side of the push rod 3 facing away from the first locking groove 302.

[0053] There are two stops 31, which are arranged at intervals along the length of the push rod 3. Each stop 31 extends along the width of the push rod 3. The two stops 31 form two side walls of the groove 301, and the upper surface of the push rod 3 forms the bottom wall of the groove 301.

[0054] Two armature positioning protrusions 33 are also provided, with the two armature positioning protrusions 33 respectively located on the inner sides of the two stops 31. In use, they are combined... Figure 2 The two armature positioning protrusions 33 are located on both sides of the protruding rib 211. Preferably, the armature positioning protrusions 33 have an arc surface for linearly abutting against the protruding rib 211. The function of the armature positioning protrusions 33 is that when the armature 21 swings to drive the push rod 3, the armature positioning protrusions 33 abut against the protruding rib 211 to perform tangential motion, and its motion is smooth.

[0055] A separator 32 is provided, which is connected between two stops 31. The separator 32 can divide the insertion groove 301 into the two sub-grooves mentioned above. Preferably, one end of the separator 32 is connected to the middle of the left stop 31, and the other end of the separator 32 is connected to the middle of the right stop 31. In this way, when in use, the separator 32 is located between the two protruding ribs 211, which can restrict the movement of the protruding ribs 211 along the width direction of the push rod 3. Moreover, the separator 32 can also improve the strength of the two stops 31.

[0056] There are two reinforcing parts 34, which are respectively located on the outer sides of the two stops 31 to further improve the strength of the stops 31. Specifically, the reinforcing part 34 includes a vertical rib 341 and a diagonal rib 342. The vertical rib 341 is connected to the corner connection between the push rod 3 and the stop 31, and the diagonal rib 342 is connected to the upper end of the push rod 3, the vertical rib 341, and the stop 31. The width extension direction of the diagonal rib 342 is the same as the length extension direction of the stop 31. In this way, the connection surface between the reinforcing part 34 and the stop 31 is approximately T-shaped, thereby improving the strength of the stop 31 in both directions (vertical and horizontal).

[0057] Of course, there may be only one reinforcing part 34, or the structures of the two reinforcing parts 34 may not be completely identical. This embodiment does not limit the number of reinforcing parts 34.

[0058] One horizontal rib 35 is provided, extending along the length of the push rod 3. The horizontal rib 35 corresponds to the position of the first locking groove 302. The horizontal rib 35 is used to improve the overall strength of the push rod 3 and prevent breakage. In addition, the number of horizontal ribs 35 can also be two, three, etc., and the number or cross-sectional size of the horizontal ribs 35 can be selected according to strength calculations.

[0059] See Figure 3 and Figure 4 In this embodiment, the base 4 is provided with a push rod movement groove 41, a through opening 42, an elastic buckle 43, a crossbeam 44, a first slot 45, a first extension block 46, a second extension block 47 and a shaft hole 48.

[0060] The push rod movement groove 41 is located on the upper side of the base 4 (i.e., the second side of the base 4), and the push rod 3 slides along its length in the push rod movement groove 41. Thus, the push rod movement groove 41 restricts the sliding direction of the push rod 3. Specifically, the length of the push rod movement groove 41 is greater than the length of the push rod 3, and the two side walls along the length of the push rod movement groove 41 can be used to abut against the push rod 3, thereby restricting the sliding stroke of the push rod 3. In particular, combined with... Figure 6 The second rib 38 on the push rod 3 can abut against the bottom surface of the push rod movement groove 41. Specifically, there are four second ribs 38, which are located in pairs on two opposite sides of the drive block 36. The second ribs 38 protrude downwards to abut against the bottom surface of the push rod movement groove 41. Preferably, the second ribs 38 extend along the width direction of the push rod 3, and the second ribs 38 have a second arc surface for linearly abutting against the bottom surface of the push rod movement groove 41. In this way, the friction between the push rod 3 and the push rod movement groove 41 can be reduced, the life of the push rod 3 can be improved, and the falling of plastic debris can be reduced.

[0061] The through-hole 42 is located inside the push rod movement groove 41 and extends through the upper and lower sides of the base 4, so that the first engaging groove 302 of the push rod 3 can be exposed from below the through-hole 42 and engage with the moving spring component 51. In particular, the through-hole 42 includes three sub-through-holes, which are arranged at intervals along the length of the push rod 3. Adjacent sub-through-holes are separated by a crossbeam 44 (or, in other words, the through-hole 42 is provided with two crossbeams 44, which divide the through-hole 42 into three sub-through-holes). The crossbeam 44 is adapted to the clearance groove 304 and can improve the strength of the base 4, preventing the push rod movement groove 41 from deforming under force and affecting the sliding of the push rod 3.

[0062] The elastic buckle 43 is also located on the upper side of the base 4 (i.e., the second side of the base 4), adjacent to the push rod movement groove 41. The elastic buckle 43 can engage with the push rod 3 to restrict the push rod 3 onto the push rod movement groove 41. Specifically, there are four elastic buckles 43, arranged in pairs on opposite sides of the width direction of the push rod movement groove 41. During assembly, the push rod 3 pushes open the elastic buckle 43 from top to bottom and enters the push rod movement groove 41. Then, the elastic buckle 43 resets and engages with the upper side of the push rod 3, thereby realizing the assembly of the push rod 3 on the base 4. Compared with the prior art, this solution saves the U-shaped locking component, solves the problem of troublesome disassembly and assembly of the push rod 3, reduces the number of assembly parts, effectively simplifies the assembly process, and reduces the overall production cost. In particular, combined with Figure 6 The first protruding rib 37 on the push rod 3 can abut against the elastic buckle 43. Specifically, there are four first protruding ribs 37, which are located in pairs below different elastic buckles 43. The first protruding ribs 37 protrude upwards to abut against the elastic buckle 43. Preferably, the first protruding ribs 37 extend along the width direction of the push rod 3, and the first protruding ribs 37 have a first arc surface for linear abutting against the elastic buckle 43. In this way, the friction between the push rod 3 and the elastic buckle 43 can be reduced, further improving the life of the push rod 3 and reducing the falling of plastic debris.

[0063] It should be noted that the number of the first protruding rib 37 and the elastic buckle 43 can also be two, three, five, six, etc., with each first protruding rib 37 corresponding to one elastic buckle 43; the number of the second protruding rib 38 can also be two, three, five, six, etc. The present invention does not impose a specific limitation on the number of the first protruding rib 37, the elastic buckle 43, and the second protruding rib 38.

[0064] Four first slots 45 are provided, and the four first slots 45 are arranged in pairs on the upper side of the base 4. The first slots 45 can be used to engage with the yoke to realize the installation of the magnetic circuit assembly 2 on the base 4. Of course, the number of first slots 45 can also be two, three, five, six, etc., and the present invention does not make a specific limitation on the number of first slots 45; or, the magnetic circuit assembly 2 can also be fixed to the base 4 by screws or other means, and the present invention does not make a specific limitation on the installation method of the magnetic circuit assembly 2 on the base 4.

[0065] Four first extension blocks 46, four second extension blocks 47, and four shaft holes 48 are provided. Each first extension block 46, each second extension block 47, and each shaft hole 48 forms a group to correspond to a contact assembly 5. The first extension block 46 is used to install the stationary spring component 52, the second extension block 47 is used to install the moving spring component 51, and the shaft hole 48 provides an axial reference for the swing of the moving spring component 51. The first extension blocks 46 and the second extension blocks 47 also have another function: they can abut or be close to the bottom cover 6 to form an isolation wall, increasing the creepage distance between two adjacent contact assemblies 5 and preventing arcing.

[0066] It should be noted that the number of the first extension block 46, the second extension block 47, the shaft hole 48 and the contact assembly 5 may also be two, three, five, six, etc. The present invention does not make a specific limitation on the number of the first extension block 46, the second extension block 47, the shaft hole 48 and the contact assembly 5.

[0067] See Figures 7 to 9 In this embodiment, the moving spring component 51 includes: a moving spring body 511, a moving contact 512, a pressure spring 513, a moving spring lead-out piece 514, and a flexible connector 515. The moving spring lead-out piece 514 is mounted on the base 4, the moving spring body 511 is rotatably connected to the moving spring lead-out piece 514, and the two ends of the flexible connector 515 are respectively connected to the moving spring body 511 and the moving spring lead-out piece 514 to achieve electrical connection. The moving contact 512 and the pressure spring 513 are mounted on two opposite sides of the moving spring body 511. The moving contact 512 can abut against the stationary contact of the stationary spring component 52, the side of the moving spring body 511 facing the moving contact 512 can abut against one side of the first engaging groove 302 of the push rod 3, and the pressure spring 513 can abut against the other side of the first engaging groove 302 of the push rod 3.

[0068] In this embodiment, in order to realize the installation of the moving spring lead-out piece 514 and its external electrical conduction, refer to... Figure 4 and Figure 10 Specifically, the moving spring lead-out piece 514 is inserted into the third slot 471 of the second extension block 47, and the end of the moving spring lead-out piece 514 protrudes outward through the end hole 61 of the bottom cover 6.

[0069] In this embodiment, the first end of the movable spring body 511 is provided with a rotating part, which can be rotatably mounted on the movable spring lead-out piece 514 during installation. (See reference...) Figure 8Specifically, the rotating part includes two first connecting ears 5111 formed by bending the moving spring body 511. The first connecting ears 5111 are provided with a first through hole 5112. The moving spring lead-out piece 514 is provided with a second connecting ear 5141. The second connecting ear 5141 is provided with a second through hole 5142. A rotating shaft 516 passes through the first through hole 5112 and the second through hole 5142 to realize the hinge between the moving spring body 511 and the moving spring lead-out piece 514. In particular, the rotating shaft 516 can also be rotatably inserted into the shaft hole 48 of the base 4, thereby facilitating the positioning of the swing axis of the moving spring body 511 and improving its performance and action accuracy.

[0070] In another preferred embodiment, the moving spring body 511 can also be directly hinged to the base 4 via a rotating part.

[0071] In this embodiment, refer to Figure 8 and Figure 9 The moving contact 512 is located at the second end of the moving spring body 511. Specifically, the moving contact 512 is provided with a riveting post 5121, and the moving spring body 511 is provided with a first riveting hole 5113 for connecting with the riveting post 5121. The pressure spring 513 is located on the side of the moving spring body 511 opposite to the moving contact 512. Specifically, the pressure spring 513 includes a fixing part 5131, a connecting part 5132, and a deformable part 5133 connected in sequence. The fixing part 5131 is connected to the moving spring body 511. Importantly, there is a gap between the deformable part 5133 and the moving spring body 511, and the cross-section of the deformable part 5133 gradually decreases in the direction away from the connecting part 5132.

[0072] In the above scheme, after the coil assembly of the magnetic circuit assembly 2 is energized, the armature 21 is attracted and swings. The armature 21 drives the push rod 3 to slide. The push rod 3 pushes the pressure spring 513 to move through the first locking groove 302, so that the moving contact 512 closes with the stationary contact of the stationary spring component 52. At the same time, through the stroke design, the deformation part 5133 of the pressure spring 513 continues to deform after the contact is closed, so as to use the pressure spring 513 to provide contact pressure for the contact, and to use the gradual reduction of the cross-section of the deformation part 5133 to make the contact pressure more effective. The deformation of the deformation part 5133 can generate an elastic force that changes in a roughly curved manner (from small to large). This means that in the initial stage, the armature 21 needs to overcome a relatively small elastic force from the deformation part 5133. After the armature 21 is fully attracted, the deformation part 5133 can provide a larger contact pressure. In this way, the electromagnetic relay can increase the contact pressure by utilizing the shape of the deformation part 5133 under normal attraction conditions, thereby improving its short-circuit resistance and enhancing the consistency of contact.

[0073] Preferably, the deformable part 5133 is generally trapezoidal in shape. In particular, the deformable part 5133 is an isosceles trapezoidal in shape. The angle C between the hypotenuse of the deformable part 5133 and its extension direction is 15° to 25°. As a specific example, the angle C is 18°, so as to better control the elasticity curve of the deformable part 5133 to approach the electromagnetic attraction force of the armature 21.

[0074] More preferably, the ratio of the width H1 of the end of the deformable part 5133 to the width H2 of the connecting end of the deformable part 5133 is between 0.35 and 0.5. As a specific example, the width H1 is 3 mm and the width H2 is 6.5 mm.

[0075] Of course, in other preferred embodiments, the deformable portion 5133 may also be in the shape of an inner arc or an outer arc of a trumpet-shaped unfolded surface.

[0076] In this embodiment, refer to Figure 8 In order to simplify the installation of the pressure spring 513, the fixing part 5131 is provided with a second riveting hole 5134 for connecting with the riveting post 5121. During installation, the riveting post 5121 passes through the first riveting hole 5113 and the second riveting hole 5134 in sequence, so that the moving contact 512 and the pressure spring 513 are riveted together to the moving spring body 511, thereby saving costs and simplifying the production process.

[0077] In this embodiment, refer to Figure 7 In order for the flexible connector 515 to achieve better electrical connection, the moving spring body 511 is provided with a first protrusion 5114 corresponding to the welding of the flexible connector 515 and / or the moving spring lead-out piece 514 is provided with a second protrusion 5143 corresponding to the welding of the flexible connector 515. In particular, the first protrusion 5114 and / or the second protrusion 5143 are formed by stamping, which facilitates the production of the moving spring body 511 and / or the moving spring lead-out piece 514.

[0078] The assembly process of the electromagnetic relay provided by this invention is as follows:

[0079] Step 1, Install push rod 3: Push rod 3 is pushed from top to bottom to open the elastic buckle 43 and enter the push rod movement groove 41. Then the elastic buckle 43 is reset and locked on the upper side of push rod 3 to realize the installation of push rod 3 on base 4.

[0080] Step 2, Install the magnetic circuit assembly 2: Assemble the coil assembly, yoke, spring and armature 21 together to form the magnetic circuit assembly 2, align the protruding rib 211 of the armature 21 with the insertion groove 301 of the push rod 3, and press the four locking feet of the yoke into the four first locking grooves 45 of the base 4 to realize the installation of the magnetic circuit assembly 2 on the base 4.

[0081] Step 3, Install contact assembly 5: Insert the moving spring lead-out piece 514 of the moving spring component 51 into the third slot 471 of the second extension block 47, insert the stationary spring lead-out piece of the stationary spring component 52 into the second slot 461 of the first extension block 46, and embed the moving spring body 511 and the pressure spring 513 into the first locking slot 302 of the push rod 3. At the same time, the auxiliary moving spring piece 53 and the auxiliary stationary spring piece 54 can also be installed on the base 4, and the auxiliary moving spring piece 53 can be embedded in the second locking slot 303 of the push rod 3.

[0082] Step 4, Install the bottom cover 6: Align the multiple end holes 61 of the bottom cover 6 with the end of the moving spring lead 514, the end of the stationary spring lead, the end of the auxiliary moving spring 53, the end of the auxiliary stationary spring 54, and the end of the coil assembly, respectively, and press the bottom cover 6 toward the base 4 to achieve the installation of the bottom cover 6 relative to the base 4.

[0083] Step 5, Install housing 1: Finally, put housing 1 over the assembled components to complete the overall installation of the electromagnetic relay.

[0084] In the above steps, steps 2 and 3 can be interchanged in order.

[0085] See Figure 1 and Figure 10 The electromagnetic relay provided by this invention operates as follows: Figure 1 With the direction as a reference, the coil assembly is energized, and the armature 21 swings counterclockwise relative to the yoke. Through the cooperation of the protruding rib 211 and the insertion slot 301, the armature 21 swings and drives the push rod 3 to slide to the left; the push rod 3 slides and uses the four first locking slots 302 to synchronously drive the four moving spring components 51 to move toward the stationary spring component 52, specifically, with Figure 10 With the direction as a reference, the first locking groove 302 of the push rod 3 pushes the pressure spring 513 to move to the left. The elastic force of the pressure spring 513 acts on the moving spring body 511 and makes the moving spring body 511 rotate clockwise until the moving contact 512 closes with the stationary contact of the stationary spring component 52. The armature 21 continues to swing, the push rod 3 continues to slide to the left, and the first locking groove 302 continues to push the pressure spring 513 to move and deform. The pressure spring 513 provides a curved elastic force to act on the moving contact 512. After the coil assembly is de-energized, each component begins to reset.

[0086] In summary, the electromagnetic relay provided by this invention has the following effects:

[0087] 1) The push rod 3 and the contact assembly 5 are respectively located on two opposite sides of the base 4. The end of the contact assembly 5 protrudes outward through the bottom cover 6. The push rod 3 is located between the second side of the base 4 and the magnetic circuit assembly 2, so that the magnetic circuit assembly 2, the push rod 3, the base 4, the contact assembly 5 and the bottom cover 6 are arranged in sequence. The space between the base 4 and the magnetic circuit assembly 2 is used to accommodate the push rod 3. In specific assembly, the push rod 3 can be installed on the base 4 first, and then the magnetic circuit assembly 2 and the contact assembly 5 are installed on the base 4 with the push rod 3 as the alignment reference. The armature 21 in the magnetic circuit assembly 2 and the moving spring component 51 of the contact assembly 5 are linked to the push rod 3 respectively. Then the bottom cover 6 is aligned with the end of the contact assembly 5 and installed on the first side of the base 4. Finally, the outer shell 1 is installed. The overall structure is compact, simple and easy to install, which is conducive to reducing the size of the relay.

[0088] 2) By placing the insertion slot 301 and the first snap-fit ​​slot 302 on opposite sides of the push rod 3, the arrangement of the first snap-fit ​​slot 302 will not be affected by the insertion slot 301. The entire length of the push rod 3 can be fully utilized to arrange the first snap-fit ​​slot 302, resulting in high length space utilization. Moreover, the armature 21 will not interfere or obstruct the moving spring component 51, ensuring that the moving spring component 51 has sufficient stroke and reducing the length of the relay.

[0089] 3) By setting push rod movement groove 41 and elastic buckle 43 on the base 4, during assembly, push rod 3 pushes open elastic buckle 43 from top to bottom and enters push rod movement groove 41. Then elastic buckle 43 resets and fastens to the upper side of push rod 3, thereby realizing the assembly of push rod 3 on base 4. The overall assembly has fewer parts, which can effectively simplify the assembly process and reduce the overall production cost.

[0090] 4) By setting the first rib 37 and the second rib 38 in the push rod 3 and further forming a line-surface contact, the friction of the push rod 3 during its movement in the base 4 can be reduced, the life of the push rod 3 can be improved, and the falling of plastic debris can be reduced.

[0091] 5) By gradually reducing the cross-section of the deformation part 5133, the deformation of the deformation part 5133 can generate an elastic force that changes in a roughly curved manner (from small to large). This means that in the initial stage, the armature 21 needs to overcome a small amount of elastic force from the deformation part 5133. After the armature 21 is fully attracted, the deformation part 5133 can provide a larger contact pressure. In this way, under normal attraction conditions, the electromagnetic relay can use the shape of the deformation part 5133 to increase the contact pressure, thereby improving its short-circuit resistance and also improving the consistency of contact.

[0092] 6) The riveting post 5121 passes through the first riveting hole 5113 and the second riveting hole 5134 in sequence, so that the moving contact 512 and the pressure spring 513 are riveted together to the moving spring body 511, thereby saving costs and simplifying the production process.

[0093] The technical means disclosed in this invention are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications are also considered within the scope of protection of this invention.

Claims

1. An electromagnetic relay, characterized in that, include: The system comprises a housing, a magnetic circuit assembly, a push rod, a base, a contact assembly, and a bottom cover. The magnetic circuit assembly, the push rod, the base, and the contact assembly are all located within the housing. The bottom cover closes to the opening of the housing. The armature in the magnetic circuit assembly is linked to the moving spring component of the contact assembly via the push rod. The base has a first side and a second side. The contact assembly and the bottom cover are both located on the first side of the base. The end of the contact assembly protrudes outward through the bottom cover. The push rod slides along its length on the second side of the base. The second side of the base is provided with a push rod movement groove. The push rod movement groove is provided with a through-hole that penetrates the two opposite sides of the base. The push rod slides in the push rod movement groove. The magnetic circuit assembly is located on the second side of the base, and the push rod is located between the second side of the base and the magnetic circuit assembly.

2. The electromagnetic relay according to claim 1, characterized in that, The push rod is provided with an insertion groove and a first locking groove on two opposite sides. The insertion groove cooperates with the protruding rib of the armature, and the first locking groove passes through the through-hole and cooperates with the moving spring component of the contact assembly.

3. The electromagnetic relay according to claim 2, characterized in that, The push rod is provided with two stops on the side away from the contact assembly. The two stops are arranged at intervals along the length of the push rod, and the two stops constitute the two side walls of the insertion groove.

4. The electromagnetic relay according to claim 3, characterized in that, A partition block is provided between the two stops, which divides the insertion groove into two sub-grooves. There are two protruding ribs, and different protruding ribs are rotatably disposed in different sub-grooves.

5. The electromagnetic relay according to claim 3, characterized in that, At least one of the blocks has a reinforcing part on its outer side.

6. The electromagnetic relay according to claim 2, characterized in that, The second side of the base is also provided with an elastic buckle located on the side of the push rod movement groove. The elastic buckle engages with the push rod to restrict the push rod on the push rod movement groove.

7. The electromagnetic relay according to claim 6, characterized in that, The push rod is provided with a first protruding rib for abutting against the elastic buckle; and / or, the push rod is provided with a second protruding rib for abutting against the bottom surface of the push rod movement groove.

8. The electromagnetic relay according to claim 7, characterized in that, The first rib and / or the second rib extend along the width direction of the push rod.

9. The electromagnetic relay according to any one of claims 1 to 8, characterized in that, The moving spring component includes a moving spring body, a moving contact, and a pressure spring. The moving contact and the pressure spring are respectively located on two opposite sides of the moving spring body. The pressure spring includes a fixed part, a connecting part, and a deformable part connected in sequence. The fixed part is connected to the moving spring body. The deformable part is spaced apart from the moving spring body, and the cross-section of the deformable part gradually decreases in the direction away from the connecting part. The side of the moving spring body facing away from the pressure spring abuts against one side wall of the first locking groove of the push rod, and the pressure spring abuts against the other side wall of the first locking groove of the push rod.

10. The electromagnetic relay according to claim 9, characterized in that, The moving spring body is provided with a first riveting hole, the fixed part is provided with a second riveting hole, and the moving contact is provided with a riveting post, which passes through the first riveting hole and the second riveting hole in sequence.

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