A snap-on electromagnetic relay with a horizontal magnetic circuit structure

Abstract

The present invention discloses a snap-on electromagnetic relay with a horizontal magnetic circuit structure, comprising a base, a coil, an iron core, an armature, a movable spring portion, a static spring portion, and a pusher block. The coil is mounted horizontally, with the armature mounted above the coil. The movable spring portion comprises a movable spring leaf, an overtravel spring leaf, and a movable contact. The head of the movable spring leaf is configured as a bridge spring leaf, which is positioned below the coil. The overtravel spring leaf is positioned inside the head of the movable spring leaf and extends obliquely above the head of the movable spring leaf. Two movable contacts are respectively positioned at opposite ends of the bridge spring leaf. Two static spring portions are respectively mounted on the base, with the static contacts of the static spring portions correspondingly mating with the movable contacts of the movable spring portion. The pusher block is connected between the head of the armature and the movable spring portion, with the top end of the overtravel spring leaf of the movable spring portion abutting against the bottom end of the pusher block. The present invention can reduce the height and length of the relay, thereby miniaturizing the relay product. Furthermore, the relay has the advantages of simple assembly and good product consistency.

Description

Technical Field

[0001] The present invention relates to the technical field of relays, and in particular to a snap-on electromagnetic relay with a horizontal magnetic circuit structure. Background Art

[0002] Electromagnetic relays are electromechanical components widely used in various household appliances, office equipment, and industrial control systems. Electromagnetic relays typically consist of a contact element, a magnetic circuit element, a pusher element, and a base. The contact element includes a moving spring element and a stationary spring element. The pusher element connects the moving spring element and the magnetic circuit element. When the magnetic circuit element is operating, the pusher element drives the moving spring element, causing the moving contact of the moving spring element to contact (i.e., the contacts are closed) or separate (i.e., the contacts are open) from the stationary contact of the stationary spring element. As the application of electromagnetic relays continues to expand, in many applications, such as automotive applications, the installation space for the relays is very limited, which requires reducing the size of the relays. A snap-on electromagnetic relay in the prior art has a horizontal magnetic circuit structure, that is, the axis of the coil of the magnetic circuit structure is parallel to the base. This type of electromagnetic relay can greatly reduce the height of the electromagnetic relay product compared to a magnetic circuit structure in which the axis of the coil is perpendicular to the base, forming a low-height electromagnetic relay, thereby reducing the installation space of the electromagnetic relay product in the height direction. However, since the contact gap of the snap-on electromagnetic relay with this horizontal magnetic circuit structure is also in the height direction of the relay product, due to the requirements of the product's breaking capacity, the gap between its moving and static contacts must have a certain range, and the coil of the relay must also meet a certain power consumption, which limits the further reduction of the relay product in the height direction. At the same time, considering the requirement that the coil provide power, the further reduction of the relay product in the height direction is also limited. In addition, since the push block is arranged outside the length direction of the iron core, this will increase the length direction size of the relay, which is not conducive to further miniaturization of the product. Summary of the Invention

[0003] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a snap-on electromagnetic relay with a horizontal magnetic circuit structure. Through structural improvements, the distribution between the various components of the relay can be made more compact, thereby further reducing the height dimension of the electromagnetic relay and reducing the length dimension of the relay, thereby realizing the miniaturization of the relay product, and having the characteristics of simple assembly and good product consistency.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a horizontal magnetic circuit structure snap-on electromagnetic relay, including a base, a coil, an iron core, an armature, a movable spring part, a static spring part and a push block; the coil is mounted horizontally on the base, the iron core fits in the through hole of the coil, the armature is mounted on the top of the coil, and the head of the armature fits with the head of the iron core with a pole surface extending out of the through hole in the iron core; the characteristic is that the movable spring part includes a movable spring piece, an overtravel spring piece and a movable contact, wherein the head of the movable spring piece is set as a bridge spring piece, and the two movable contacts are respectively set on the bridge spring piece. at both ends, the movable spring piece is arranged below the coil, and the tail of the movable spring piece is fixed to the base so that the head of the movable spring piece can swing up and down relative to the base, and the overtravel spring piece is arranged on the inner side of the head of the movable spring piece and extends obliquely above the head of the movable spring piece; the static spring part is divided into two, and the two static spring parts are respectively provided with static contacts, and the two static spring parts are respectively mounted on the base, and the static contacts of the static spring parts correspond to the moving contacts of the dynamic spring part; the pushing block is connected between the head of the armature and the movable spring part, and the top end of the overtravel spring piece of the movable spring part is against the bottom end of the pushing block.

[0005] The movable spring is of an extended type, and its length is along the axial direction of the coil. The tail of the movable spring is fixed on a base at an inner position of a flange at one end of the coil frame corresponding to the coil, and the head of the movable spring extends to below a position corresponding to the outer position of the flange at the other end of the coil frame corresponding to the core pole surface, so as to achieve a compact distribution between the movable spring and the coil.

[0006] The movable spring is composed of three springs stacked together, and a U-shaped bending structure is provided at a position where the movable spring is fixed to the base near the tail to improve the flexibility of the movable spring.

[0007] The base is provided with a first groove of a U-shaped bent structure for accommodating the movable spring.

[0008] The overtravel spring is a separate part, one end of which is fixed to the position of the movable spring close to the movable contact in the length direction, and the other end of which is arranged in an arc structure to abut against the bottom end of the pushing block.

[0009] The overtravel spring is composed of two integrally formed anti-warping sheet bodies of the topmost layer of the three spring leaves of the dynamic spring. One end of the anti-warping sheet body is integrally connected to the inner position of the bridge spring corresponding to the dynamic contact point, and the other end of the anti-warping sheet body is bent into a roughly horizontal shape and rests against the bottom end of the pushing block.

[0010] The pushing block is a cage-type structure, including a bottom structure and side plates extending upward from both sides of the bottom structure. The two side plates of the pushing block respectively surround the two sides of the head of the iron core corresponding to the width of the iron core. The bottom structure of the pushing block corresponds to the bottom of the head of the iron core. The top ends of the two side plates of the pushing block respectively cooperate with the two sides of the head of the armature corresponding to the width of the armature; the bottom end of the bottom structure of the pushing block cooperates with the top end of the overtravel spring.

[0011] A second groove is respectively provided at the top of the two side plates of the pushing block, and a convex portion is respectively provided outward on both sides of the head of the armature corresponding to the width of the armature, and the two convex portions of the head of the armature are respectively fitted in the corresponding second grooves at the top of the two side plates of the pushing block.

[0012] The bottom structure of the pushing block includes a bottom plate and several reinforcing plates, the two ends of the bottom plate of the pushing block are respectively fixed to the bottom ends of the two side plates of the pushing block; the several reinforcing plates are distributed side by side in a roughly vertical manner, and the bottom end of each reinforcing plate is fixed to the bottom plate of the pushing block, and the two ends of each reinforcing plate are respectively fixed to the two side plates of the pushing block; the top end of the overtravel spring rests on the lower surface of the bottom plate of the pushing block.

[0013] The iron core is plate-shaped and is provided with a first bending portion so that the head of the iron core deviates above the through-hole position of the coil; widening portions are also provided on both sides of the head of the armature corresponding to the width of the armature, and the convex portion is provided on the outside of the widening portion.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. This invention employs a horizontal coil mounting on a base, with the head of the movable spring configured as a bridge spring to mate with two stationary springs, creating a dual-contact structure. The movable spring utilizes an overtravel spring to mate with the pusher. This structure reduces the height of the relay by utilizing the horizontal placement of the coil. The bridge-type dual-contact structure achieves a higher breaking capacity than a single contact at the same voltage and current. Specifically, at the same voltage and current, the contact gap is halved compared to a single contact for the same breaking capacity, and the armature travel is also halved, thereby reducing the relay's power consumption and further reducing the height of the electromagnetic relay.

[0016] 2. The present invention employs an extended movable spring, with its tail fixed to a base located inside the flange of one end of the coil bobbin, and its head extending below the core pole surface, outside the flange of the other end of the coil bobbin. This achieves a compact arrangement between the movable spring and the coil. Furthermore, a U-shaped bend is provided near the location where the tail of the movable spring is fixed to the base. This structure provides the movable spring with sufficient flexibility, minimizing its reaction force and the corresponding suction force. This significantly reduces the amount of enameled wire used, reduces the volume of the coil, and ultimately miniaturizes the relay.

[0017] 3. The present invention adopts an overtravel spring that is formed as two inverted leaf bodies of the top layer of the three leaf springs of the moving spring. One end of the inverted leaf body is integrally connected to the inner position of the bridge spring corresponding to the moving contact, and the other end of the inverted leaf body is bent into a roughly horizontal shape to rest against the bottom end of the push block. In this structure of the present invention, the overtravel spring is the two inverted leaf bodies of the top layer of the three leaf springs, and is arranged on both sides of the head of the moving spring. Its pushing force is greater than that of a single leaf spring, which can further reduce the height size of the relay, thereby achieving the purpose of miniaturization of the product. Moreover, the inverted leaf body and the top layer of the three leaf springs are an integrated structure with fewer parts and simpler assembly. The inverted angle of the inverted leaf body can be controlled by the mold, and the product consistency is better.

[0018] 4. The present invention employs a cage-like structure for the pusher block, comprising a bottom structure and side plates extending upward from either side of the bottom structure. The side plates of the pusher block respectively surround the two sides of the core head corresponding to the core width, and the top ends of the side plates of the pusher block respectively mate with the two sides of the armature head corresponding to the armature width. The bottom end of the pusher block's bottom structure mates with the overtravel spring. This structure of the present invention allows the pusher block to mate with the armature head on either side corresponding to the core width, eliminating the need for the armature to extend from the length of the core to mate with the pusher block. This reduces the relay's length, thereby miniaturizing the relay. Furthermore, since the pusher block mates with the armature at two points, the gap between the armature and the core is effectively balanced.

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments; however, the snap-on electromagnetic relay of the horizontal magnetic circuit structure of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 1 is a schematic diagram of the three-dimensional structure of the first embodiment of the present invention (excluding the housing);

[0021] Figure 2This is a front view of the first embodiment of the present invention (excluding the housing);

[0022] Figure 3 is a side view of embodiment 1 of the present invention (excluding the housing);

[0023] Figure 4 is a cross-sectional view of embodiment 1 of the present invention;

[0024] Figure 5 1 is a schematic diagram of the three-dimensional structure of the push block and the armature in the first embodiment of the present invention;

[0025] Figure 6 This is a front view of the push block and the armature in the first embodiment of the present invention;

[0026] Figure 7 1. It is a schematic diagram of the three-dimensional structure of the push block and the overtravel spring in the first embodiment of the present invention;

[0027] Figure 8 This is a schematic diagram of the three-dimensional structure of the push block and the overtravel spring in the first embodiment of the present invention (flipped at an angle);

[0028] Figure 9 This is a front view of the push block and the overtravel spring in the first embodiment of the present invention;

[0029] Figure 10 1 is a schematic diagram of the three-dimensional structure of the movable spring portion of the first embodiment of the present invention;

[0030] Figure 11 This is a front view of the movable reed portion of the first embodiment of the present invention;

[0031] Figure 12 1 is a schematic diagram of the three-dimensional structure of the movable spring in the first embodiment of the present invention;

[0032] Figure 13 1 is a schematic diagram of the three-dimensional structure of the overtravel spring according to the first embodiment of the present invention;

[0033] Figure 14 1 is a schematic diagram of the three-dimensional structure of the push block according to the first embodiment of the present invention;

[0034] Figure 15 This is a schematic diagram of the three-dimensional structure of the push block and the dynamic spring part in the second embodiment of the present invention;

[0035] Figure 16 This is a front view of the push block and the movable spring portion in the second embodiment of the present invention;

[0036] Figure 17 2 is a schematic diagram of the three-dimensional structure of the movable spring and the overtravel spring in the second embodiment of the present invention;

[0037] Figure 18 This is a front view of the movable spring and the overtravel spring in the second embodiment of the present invention;

[0038] Figure 19 It is a schematic diagram of the three-dimensional structure of the pushing block of the second embodiment of the present invention. DETAILED DESCRIPTION

[0039] Example 1

[0040] See also Figures 1 to 14 As shown, a snap-on electromagnetic relay with a horizontal magnetic circuit structure of the present invention comprises a housing 1, a base 2, a coil 3, an iron core 4, an armature 5, a moving spring portion 6, a static spring portion 7 and a push block 8; the coil 3 is mounted horizontally on the base 2, the coil 3 comprises a coil frame 31 and an enameled wire wound on the coil frame 31, the iron core 4 fits in the through hole of the coil 3 (i.e., the through hole of the coil frame 31), the armature 5 is mounted on the top of the coil 3, and the head 51 of the armature 5 fits with the head 41 of the iron core with a pole surface extending out of the through hole in the iron core 4; the moving spring portion 6 comprises a moving spring piece 61, an overtravel spring piece 62 and a moving contact 64, wherein the head of the moving spring piece 61 is set as a bridge spring piece 63, and the two moving contacts 64 are respectively set at At both ends of the bridge spring 63, the movable spring 61 is arranged below the coil 3, and the tail of the movable spring 61 is fixed to the base 2 so that the head 63 of the movable spring 61 can swing up and down relative to the base 2, and the overtravel spring 62 is arranged on the inner side of the head of the movable spring 61 and extends obliquely above the head of the movable spring; the static spring part 7 is two, and the two static spring parts are respectively provided with static contacts 71. The two static spring parts 7 are respectively mounted on the base 2, and the static contacts 71 of the two static spring parts 7 respectively match the movable contacts 64 at both ends of the upper bridge spring 63; the pushing block 8 is connected between the head 51 of the armature and the movable spring part 6, and the top of the overtravel spring 62 of the movable spring part is against the bottom end of the pushing block 8.

[0041] In this embodiment, the movable spring 61 is of an extended type. The length of the movable spring 61 is along the axial direction of the coil 3 (which is also the axial direction of the through hole of the coil frame 31). The tail of the movable spring 61 is fixed to the base 2 at a position corresponding to the inner side of the flange 32 at one end of the coil frame, and the head 63 of the movable spring extends to a position corresponding to the outer side of the flange 33 at the other end of the coil frame and below the position corresponding to the pole surface of the iron core 4 (i.e., the head of the iron core), so as to achieve a compact distribution between the movable spring 61 and the coil 3.

[0042] In this embodiment, the movable spring 61 is composed of three springs stacked together. A U-shaped bent structure 65 is provided near the tail of the movable spring 61 where it is fixed to the base to improve the flexibility of the movable spring 61.

[0043] In this embodiment, the base 2 is provided with a first groove 21 of a U-shaped bent structure for accommodating the movable spring.

[0044] In this embodiment, the overtravel spring 62 is a separate part, one end of the overtravel spring 62 is fixed to the position of the dynamic spring 61 close to the dynamic contact 64 in the length direction, and the other end of the overtravel spring 62 is set into an arc structure 621 to abut the bottom end of the pushing block 8.

[0045] In this embodiment, the pushing block 8 is a cage-type structure, including a bottom structure 82 and side plates 81 extending upward from both sides of the bottom structure. The two side plates 81 of the pushing block 8 are respectively surrounded by the two sides of the head 41 of the iron core corresponding to the width of the iron core. The bottom structure 82 of the pushing block 8 corresponds to the bottom of the head 41 of the iron core, and the top ends of the two side plates 81 of the pushing block are respectively matched with the two sides of the head 51 of the armature corresponding to the width of the armature; the bottom end of the bottom structure 82 of the pushing block 8 is matched with the top end of the overtravel spring 62.

[0046] In this embodiment, a second groove 811 is respectively provided at the top of the two side plates 81 of the pushing block 8, and a protrusion 52 is respectively provided outward on both sides of the head 51 of the armature 5 corresponding to the width of the armature, and the two protrusions 52 of the head 51 of the armature are respectively engaged in the corresponding second grooves 811 at the top of the two side plates 81 of the pushing block 8.

[0047] In this embodiment, the groove walls on both sides of the second groove 811 are set to an inclined state, and the second groove 811 is gradually enlarged from the inside to the outside of the groove; a boss 812 is provided at the bottom of the second groove 811, and the bottom surface of the protrusion 52 of the head 51 of the armature 5 is against the boss 812 of the second groove 811 of the pushing block 8.

[0048] In this embodiment, the bottom structure 82 of the pushing block 8 includes a bottom plate 821 and several reinforcing plates 822. In this embodiment, there are three reinforcing plates 822. The two ends of the bottom plate 821 of the pushing block are respectively fixed to the bottom ends of the two side plates 81 of the pushing block 8; the three reinforcing plates 822 are distributed side by side in a roughly vertical manner, and the bottom end of each reinforcing plate 822 is fixed to the bottom plate 821 of the pushing block, and the two ends of each reinforcing plate 822 are respectively fixed to the two side plates 81 of the pushing block; the overtravel spring 62 at the head of the dynamic spring part is against the lower surface of the bottom plate 821 of the pushing block 8.

[0049] In this embodiment, the lower surface of the bottom plate 821 of the pushing block 8 is further provided with an upwardly recessed third groove 823 , and the arc structure 621 of the overtravel spring leaf 62 of the dynamic spring portion abuts against the third groove 823 of the bottom plate of the pushing block 8 .

[0050] In this embodiment, the iron core 4 is plate-shaped, and the iron core 4 is provided with a first bending portion 42 to make the head 41 of the iron core deviate above the through-hole position of the coil frame; the head 51 of the armature 5 is also provided with widening portions 53 on both sides corresponding to the width of the armature, and the protrusion 52 is provided on the outside of the widening portion 53.

[0051] The present invention employs a snap-action electromagnetic relay with a horizontal magnetic circuit structure. The coil 3 is mounted horizontally on a base 2. The head 53 of the movable spring 61 is configured as a bridge spring to mate with two stationary spring portions 7, forming a dual-contact structure. The movable spring portion 6 utilizes an overtravel spring 62 to mate with a pusher block 8. This structure, utilizing the horizontal placement of the coil 3, reduces the relay's height. The bridge-type dual-contact structure enables a higher breaking capacity than a single contact at the same voltage and current. Specifically, at the same voltage and current, the contact gap is reduced by half compared to a single contact for the same breaking capacity, and the armature travel is also reduced by half, thereby reducing the relay's power consumption and further reducing the electromagnetic relay's height.

[0052] The present invention employs a horizontal magnetic circuit structure with a snap-on electromagnetic relay. The movable spring 61 is designed as an extended shape. The tail of the movable spring 61 is fixed to the base 2 at a position corresponding to the inner side of the flange 32 of the coil bobbin at one end. The head 63 of the movable spring extends to a position corresponding to the outer side of the flange 33 of the coil bobbin at the position corresponding to the pole surface of the iron core 4, thereby achieving a compact arrangement between the movable spring 61 and the coil 3. A U-shaped bend structure 65 is also provided near the location where the tail of the movable spring 61 is fixed to the base. This structure of the present invention provides sufficient flexibility for the movable spring 61, reducing its reaction force and the corresponding suction force. This significantly reduces the amount of enameled wire used, the volume of the coil, and the overall miniaturization of the relay.

[0053] The present invention discloses a snap-on electromagnetic relay with a horizontal magnetic circuit structure, wherein the push block 8 is configured as a cage structure, including a bottom structure 82 and side plates 81 extending upward from both sides of the bottom structure. The side plates 81 of the push block 8 respectively surround the two sides of the head 41 of the iron core 4 corresponding to the width of the iron core, and the top ends of the side plates 81 of the push block 8 respectively cooperate with the two sides of the head 51 of the armature 5 corresponding to the width of the armature; the bottom end of the bottom structure 82 of the push block 8 cooperates with the overtravel spring 62. In this structure of the present invention, since the push block 8 cooperates with the head 51 of the armature on both sides corresponding to the width of the iron core, the armature does not need to extend from the length direction of the iron core to cooperate with the push block, and the length of the relay can be reduced in the length direction to achieve miniaturization of the relay. In addition, since there are two points of cooperation between the push block and the armature, the gap between the armature and the iron core can be better balanced.

[0054] Example 2

[0055] See also Figures 15 to 19 As shown, a snap-on electromagnetic relay with a horizontal magnetic circuit structure of the present invention is different from the embodiment 1 in that the overtravel spring is composed of two integrally formed anti-warping sheet bodies 66 of the topmost layer of the three spring sheets of the moving spring sheet 61, and one end of the anti-warping sheet body 66 is integrally connected to the inner side position of the bridge spring corresponding to the moving contact, and the other end of the anti-warping sheet body 66 is bent into a roughly horizontal shape and abuts against the bottom end of the pushing block 8, and the bottom end of the pushing block 8 is flat.

[0056] The present invention discloses a snap-on electromagnetic relay with a horizontal magnetic circuit structure, which uses an overtravel spring formed as two pieces of an inverted flap body 66 integrally formed on the top layer of the three-leaf spring of the moving spring. One end of the inverted flap body 66 is integrally connected to the inner position of the bridge spring corresponding to the moving contact, and the other end of the inverted flap body 66 is bent into a roughly horizontal shape and abuts against the bottom end of the push block. In this structure of the present invention, the overtravel spring is the two inverted flap bodies 66 of the top layer of the three-leaf spring, and is arranged on both sides of the head of the moving spring. Its pushing force is greater than that of a single spring, which can further reduce the height of the relay, thereby achieving the purpose of miniaturization of the product. Moreover, the inverted flap body 66 and the top layer of the three-leaf spring are an integrated structure with fewer parts and simpler assembly. The inverted flap angle of the inverted flap body can be controlled by the mold, and the product consistency is better.

[0057] The above is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as above in terms of a preferred embodiment, it is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the technical solution of the present invention, use the technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent equivalent embodiment. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A snap-on electromagnetic relay with a horizontal magnetic circuit structure, comprising a base, a coil, an iron core, an armature, a movable spring portion, a stationary spring portion, and a pusher block; the coil is mounted horizontally on the base, the iron core fits within a through hole of the coil, and the armature is mounted above the coil, with the armature head engaging the head of the iron core having a pole surface extending out of the through hole of the iron core; and characterized in that: The dynamic spring part includes a dynamic spring piece, an overtravel spring piece and a dynamic contact, wherein the head of the dynamic spring piece is set as a bridge spring piece, and the two dynamic contacts are respectively arranged at the two ends of the bridge spring piece, the dynamic spring piece is arranged below the coil, and the tail of the dynamic spring piece is fixed to the base so that the head of the dynamic spring piece can swing up and down relative to the base, and the overtravel spring piece is arranged on the inner side of the head of the dynamic spring piece and extends obliquely above the head of the dynamic spring piece; the static spring part is two, and the two static spring parts are respectively provided with static contacts, and the two static spring parts are respectively installed on the base, and the static contacts of the static spring part correspond to the dynamic contacts of the dynamic spring part; the push The block is connected between the head of the armature and the dynamic spring part, and the top end of the overtravel spring of the dynamic spring part abuts against the bottom end of the pushing block; the pushing block is a cage structure, including a bottom structure and side plates extending upward from both sides of the bottom structure, and the two side plates of the pushing block respectively surround the two sides of the head of the iron core corresponding to the width of the iron core, and the bottom structure of the pushing block corresponds to the bottom of the head of the iron core, and the top ends of the two side plates of the pushing block respectively cooperate with the two sides of the head of the armature corresponding to the width of the armature; the bottom end of the bottom structure of the pushing block cooperates with the top end of the overtravel spring.

2. The snap-on electromagnetic relay with a horizontal magnetic circuit structure according to claim 1, characterized in that: The movable spring is of an extended type, and its length is along the axial direction of the coil. The tail of the movable spring is fixed on a base at an inner position of a flange at one end of the coil frame corresponding to the coil, and the head of the movable spring extends to below a position corresponding to the outer position of the flange at the other end of the coil frame corresponding to the core pole surface, so as to achieve a compact distribution between the movable spring and the coil.

3. The snap-on electromagnetic relay with a horizontal magnetic circuit structure according to claim 1 or 2, characterized in that: The movable spring is composed of three springs stacked together, and a U-shaped bending structure is provided at a position where the movable spring is fixed to the base near the tail to improve the flexibility of the movable spring.

4. The snap-on electromagnetic relay with a horizontal magnetic circuit structure according to claim 3, characterized in that: The base is provided with a first groove of a U-shaped bent structure for accommodating the movable spring.

5. The snap-on electromagnetic relay with a horizontal magnetic circuit structure according to claim 1, characterized in that: The overtravel spring is a separate part, one end of which is fixed to the position of the movable spring close to the movable contact in the length direction, and the other end of which is arranged in an arc structure to abut against the bottom end of the pushing block.

6. The snap-on electromagnetic relay with a horizontal magnetic circuit structure according to claim 3, characterized in that: The overtravel spring is composed of two integrally formed anti-warping sheet bodies of the topmost layer of the three spring leaves of the dynamic spring. One end of the anti-warping sheet body is integrally connected to the inner position of the bridge spring corresponding to the dynamic contact point, and the other end of the anti-warping sheet body is bent into a roughly horizontal shape and rests against the bottom end of the pushing block.

7. The snap-on electromagnetic relay with a horizontal magnetic circuit structure according to claim 1, characterized in that: A second groove is respectively provided at the top of the two side plates of the pushing block, and a convex portion is respectively provided outward on both sides of the head of the armature corresponding to the width of the armature, and the two convex portions of the head of the armature are respectively fitted in the corresponding second grooves at the top of the two side plates of the pushing block.

8. The snap-on electromagnetic relay with a horizontal magnetic circuit structure according to claim 1, characterized in that: The bottom structure of the pushing block includes a bottom plate and several reinforcing plates, the two ends of the bottom plate of the pushing block are respectively fixed to the bottom ends of the two side plates of the pushing block; the several reinforcing plates are distributed side by side in a roughly vertical manner, and the bottom end of each reinforcing plate is fixed to the bottom plate of the pushing block, and the two ends of each reinforcing plate are respectively fixed to the two side plates of the pushing block; the top end of the overtravel spring rests on the lower surface of the bottom plate of the pushing block.

9. The snap-on electromagnetic relay with a horizontal magnetic circuit structure according to claim 7, characterized in that: The iron core is plate-shaped and is provided with a first bending portion so that the head of the iron core deviates above the through-hole position of the coil; widening portions are also provided on both sides of the head of the armature corresponding to the width of the armature, and the convex portion is provided on the outside of the widening portion.

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