CN218385015U

CN218385015U - Small electromagnetic relay with high contact travel

Info

Publication number: CN218385015U
Application number: CN202222411497.9U
Authority: CN
Inventors: 朱军; 洪泽钊; 林煜博
Original assignee: Zhejiang Meishuo Electric Technology Co ltd
Current assignee: Zhejiang Meishuo Electric Technology Co ltd
Priority date: 2022-09-09
Filing date: 2022-09-09
Publication date: 2023-01-24
Anticipated expiration: 2032-09-09

Abstract

The utility model discloses a small-size electromagnetic relay of high contact stroke, including the bed frame that is provided with cavity and lower cavity, and relative movable contact spring and the static contact that set up in last cavity, and install the magnetic circuit assembly in cavity down, but the wobbling is provided with the armature structure relative with movable contact spring in penetrating the cavity on the magnetic circuit assembly, one of armature structure is served and is provided with the protruding drive arch of stretching to movable contact spring one side, movable contact spring and static contact that adopt this technical scheme can do contact stroke interval great in last cavity, contact electrical clearance has been increased, and utilize the drive arch to shorten the trigger distance between armature structure and the movable contact spring, occupation space is little, the swing range is big again, transmission structure has been simplified, this kind of drive arch can realize the integral type installation on the bed frame with structure equipment together, the action reliability is high, the simple to operate is swift, the installation effectiveness is high.

Description

Small electromagnetic relay with high contact stroke

Technical Field

The utility model relates to a low-voltage apparatus technical field specifically is a small-size electromagnetic relay who relates to a high contact stroke.

Background

An electromagnetic relay is an electronic control device having a control system (also called an input loop) and a controlled system (also called an output loop), which is usually applied in an automatic control circuit, and which is actually an "automatic switch" that uses a smaller current and a lower voltage to control a larger current and a higher voltage. Therefore, the circuit plays the roles of automatic regulation, safety protection, circuit conversion and the like.

The existing small electromagnetic relay generally comprises a base, a magnetic circuit part, a contact part and a push rod, wherein the contact part consists of a moving contact and a fixed contact which are inserted on the base, the push rod is movably arranged between an armature of the magnetic circuit part and the moving contact, the push rod is driven to move when the armature is attracted and swung by the magnetic circuit part, and then the moving contact is driven by the push rod to contact with the fixed contact. Therefore, an optimized product transmission structure is urgently needed to be developed at the present stage, the increase of the contact electrical clearance is facilitated, and the electromagnetic relay product with high action reliability is required.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art to provide an optimize product transmission structure, increase contact electrical clearance, small-size electromagnetic relay that the action reliability is high.

In order to solve the above problem, the utility model provides a small-size electromagnetic relay of high contact stroke, include:

the pedestal is provided with an installation cavity formed by connecting an upper cavity and a lower cavity;

the contact assembly comprises a movable spring plate and a static contact plate, wherein the movable spring plate extends in the length direction of the base frame and penetrates through the upper cavity, the static contact plate is erected above the movable spring plate and connected to the top of the base frame, and one end of the movable spring plate, which is opposite to the static contact plate, is correspondingly provided with a group of contacts;

the driving device is arranged in the mounting cavity and comprises a magnetic circuit component arranged in the lower cavity and an armature structure which can be arranged on the magnetic circuit component in a swinging mode, the armature structure penetrates into the upper cavity and is arranged opposite to the movable reed, one end of the armature structure is provided with a driving bulge protruding towards one side of the movable reed, and the armature structure drives the driving bulge to push the movable reed to be in contact with a group of contacts of the static contact piece when swinging towards one side of the movable reed.

In the above-mentioned miniature electromagnetic relay, the open cavity opening of the mounting cavity is disposed on the front side of the base frame, so that the magnetic circuit assembly and the armature structure are laterally loaded into the mounting cavity through the open cavity opening, and the side of the movable spring facing the open cavity opening is formed with a guiding bevel edge which tilts and tilts corresponding to the driving protrusion.

In the above-mentioned small-size electromagnetic relay, the armature structure includes the armature body and sets up the piece is moulded to the insulation on armature body one end, the bed frame is including extending the baffle structure between movable spring and the armature body, the one end of baffle structure is provided with the inclined plane structure, protruding integrated into one piece of drive or fixing is moulded to the insulation is last to be located the inclined plane structure outside.

In the small-sized electromagnetic relay, the driving protrusion is a U-shaped raised line clamped on the insulating plastic part, and the U-shaped raised line extends in a certain radian.

Among the foretell small-size electromagnetic relay, the shaping has the installation base on the insulating piece of moulding, and extends to set up along the length direction of installation base spacing slot on the installation base, spacing slot is including extending to the open end of installation base one end, and be subject to the closed end of the installation base other end, and set up in the spacing slot with the spacing lug that the closed end links to each other, the open end is the bell-mouth shape towards open accent, U-shaped sand grip is gone into from opening end department side direction card in the spacing slot and the encirclement is pressed from both sides tightly spacing lug, be provided with the joint structure that keeps the two relative position fixed between U-shaped sand grip and the spacing slot.

In the small-size electromagnetic relay, the joint structure including set up in the closed end just is located two first draw-in grooves of spacing lug both sides with set up in two second draw-in grooves of open end both sides lateral wall are still including setting up two fixed buckles of U-shaped sand grip one end and cooperation joint in two first draw-in grooves to and be the slope form setting and be in two elastic buckle of U-shaped sand grip other end and cooperation joint in two second draw-in grooves.

In the small-sized electromagnetic relay, two strip-shaped clamping grooves are formed in the mounting boss of the insulating plastic part, and two sides of the U-shaped raised line are vertically clamped in the two strip-shaped clamping grooves respectively.

In the small electromagnetic relay, the driving protrusion is a circular boss riveted on the insulating plastic part; or the driving bulge is a V-shaped inserting sheet which is tightly matched and inserted on the insulating plastic part.

In the above-mentioned small electromagnetic relay, the magnetic circuit assembly includes an electromagnetic coil and a yoke installed in the lower chamber, the armature structure is connected to one end of the yoke in a swinging manner, a reed structure is provided between the yoke and the armature structure, and the reed structure applies a biasing force to the armature structure in a swinging manner towards a side away from the movable reed; the upper side of the lower chamber is provided with a plurality of upper limiting grooves for positioning the yoke, and the lower side of the lower chamber is provided with two lower limiting grooves suitable for two terminal pins of the electromagnetic coil to penetrate through.

In the small electromagnetic relay, the movable contact spring and the static contact spring respectively comprise a movable conductive plate and a static conductive plate which are bent and extend to the rear side surface of the base frame, and the movable conductive plate and the static conductive plate extend out of the bottom of the base frame in parallel; and two groups of positioning block assemblies for positioning and connecting the movable conductive plate and the static conductive plate are arranged on the rear side surface of the base frame.

Compared with the prior art, the technical scheme of the utility model have following advantage:

1. the utility model provides an among the electromagnetic relay, movable contact spring and static contact are relative to set up in the last cavity at bed frame top, and magnetic circuit component installs under in the cavity, and have the armature structure relative with the movable contact spring in penetrating the cavity, through serve to be provided with the protruding drive arch that stretches to movable contact spring one side at armature structure, when magnetic circuit component circular telegram produced electromagnetic force actuation armature structure swing, make the drive arch under the drive of armature structure the movable contact spring contact with a set of contact of static contact, the benefit of adopting this technical scheme lies in, this kind of movable contact spring and static contact are located the cavity and can be done contact stroke interval greatly, with increase contact electrical clearance, and utilize the drive arch to shorten the trigger distance between armature structure and the movable contact spring, occupation space is little, the swing range is big again, thereby traditional push rod structure set up mode has been replaced, the transmission structure has been simplified, rationally optimize product inner structure overall arrangement, this kind of drive arch is the armature structure of preassembleing in advance and forms integrative linkage cooperation, and realize the installation on armature structure, the action reliability is high, the quick, the accuracy of triggering, the simple to operate, the product installation, the integral type promotes the performance, the product utilization efficiency of following with.

2. The utility model provides an among the electromagnetic relay, correspond on movable reed one side the protruding shaping of drive has the bevel edge that leads that the slope perk, and the bevel edge that leads is towards the open accent of installation cavity, and this kind of structure setting drives the drive arch according to armature structure and inserts the last cavity of installation cavity from development mouth position side direction, is favorable to guiding the protruding more light supreme cavity of smoothly packing into of drive through the bevel edge that leads, avoids simultaneously taking place the scratch phenomenon between movable reed's the side and the drive arch.

3. The utility model provides an among the electromagnetic relay, the armature structure is moulded the piece by armature body and insulation and is constituteed, and this kind of drive arch both can integrated into one piece on the piece is moulded to the insulation, also can be fixed on the piece is moulded to the insulation, consequently has multiple installation and sets up the mode, and it is more nimble convenient to use to, this drive arch has increased self mounting height to utilize and set up the big characteristics of amplitude of oscillation that have with armature structure linkage, thereby can promote realize the contact of big stroke between movable contact spring piece and the static contact piece, thereby satisfy the requirement of relay product to increase contact electrical clearance.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below.

Fig. 1 is a schematic perspective view of a small electromagnetic relay according to the present invention;

fig. 2 is a schematic view of the rear perspective structure of the miniature electromagnetic relay of the present invention;

fig. 3 is a schematic plan view of the base frame of the present invention;

fig. 4 is a schematic view of the installation structure of the driving protrusion of the present invention;

fig. 5 is a schematic view of a split structure of the U-shaped raised line and armature structure of the present invention;

FIG. 6 is a schematic view of a split structure of another variation of the U-shaped rib shown in FIG. 5;

FIG. 7 is a schematic view of another installation of the driving protrusions of the present invention;

description of reference numerals: 1. a base frame; 11. an upper chamber; 12. a lower chamber; 13. a bevel structure; 14. an upper limiting groove; 15. a lower limiting groove; 2. a movable spring plate; 21. a movable conductive plate; 3. a static contact sheet; 31. a static conductive plate; 4. a magnetic circuit component; 41. an electromagnetic coil; 42. a yoke iron; 43. a reed structure; 5. an armature structure; 51. an insulating plastic part; 52. mounting a boss; 53. a strip-shaped clamping groove; 6. a drive boss; 61. a U-shaped convex strip; 62. fixing a buckle; 62. elastic buckle; 7. a hypotenuse guide; 8. a positioning block assembly; 9. limiting slots; 91. an open end; 92. a closed end; 93. a limiting bump; 94. and a second card slot.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood as a specific case by those skilled in the art.

Example 1

The present embodiment provides a small electromagnetic relay with a high contact stroke as shown in fig. 1 to 7, comprising:

a base frame 1 having an installation cavity formed by connecting an upper chamber 11 and a lower chamber 12;

the contact assembly comprises a movable contact spring 2 extending in the length direction of the base frame 1 and penetrating through the upper chamber 11, and a static contact spring 3 erected above the movable contact spring 2 and connected to the top of the base frame 1, wherein one end of the movable contact spring 2, which is opposite to the static contact spring 3, is correspondingly provided with a group of contacts;

the driving device is arranged in the mounting cavity and comprises a magnetic circuit component 4 mounted in the lower cavity 12 and an armature structure 5 which can be arranged on the magnetic circuit component 4 in a swinging mode, the armature structure 5 penetrates into the upper cavity 11 and is arranged opposite to the movable spring piece 2, a driving protrusion 6 protruding towards one side of the movable spring piece 2 is arranged at one end of the armature structure 5, and the armature structure 5 drives the driving protrusion 6 to swing towards one side of the movable spring piece 2 to push the movable spring piece 2 to be in contact with a group of contacts of the static contact piece 3.

The above embodiment is a core technical scheme of this embodiment, according to that the movable spring piece 2 and the static contact piece 3 are relatively arranged in an upper chamber at the top of the base frame, and the magnetic circuit component 4 is arranged in a lower chamber and has an armature structure 5 penetrating into the upper chamber 11 and opposite to the movable spring piece 2, by arranging the driving protrusion 6 protruding to one side of the movable spring piece on one end of the armature structure 5, when the magnetic circuit component 4 is electrified to generate electromagnetic force to attract the armature structure 5 to swing, the driving protrusion 6 is driven by the armature structure 5 to push the movable spring piece 2 to contact with a group of contacts of the static contact piece 3.

As shown in fig. 1-3, the open accent of installation cavity sets up at the leading flank of bed frame 1, and the design makes drive arrangement adopt the mode of side direction installation to assemble to the bed frame like this, pack into to through open accent side direction after magnetic circuit subassembly and armature structure assemble an organic whole structure in the installation cavity, movable contact spring piece 2 corresponds on the side of open accent the protruding shaping of drive has the guide hypotenuse 7 of slope perk, and this kind of structural setting drives in the last chamber 11 of installation cavity according to armature structure 5, is favorable to guiding drive arch 6 and more easily smoothly packs into to supreme chamber through guide hypotenuse 7, avoids taking place the scratch phenomenon between movable contact spring piece's side and the drive arch simultaneously.

The specific arrangement of the driving protrusions is described in detail below with reference to fig. 1 and 4-7:

armature structure 5 includes the armature body and sets up an insulating piece 51 of moulding on one end of armature body, bed frame 1 is including extending diaphragm structure between movable reed 2 and the armature body, the one end of diaphragm structure is provided with inclined plane structure 13, and this kind of inclined plane structure 13 sets up and is favorable to the increase the amplitude of oscillation of armature structure 5, drive arch 6 is located the inclined plane structure outside, drive arch 6 both can integrated into one piece mould 51 on insulating, also can fix on moulding 51 insulating, the design makes drive arch 6 and armature structure 5 realize as an organic whole structure integral installation on bed frame 1 to have multiple installation setting mode, it is more nimble convenient to use. And this drive arch 6 has increased self mounting height to utilize and have the big characteristics of amplitude of oscillation with armature structure 5 linkage setting, thereby can promote realize the contact of big stroke between movable contact spring and the static contact, thereby satisfy the requirement of relay product to increase contact electric clearance.

As a preferred embodiment, referring to fig. 4-5, the driving protrusion 6 is a U-shaped protruding strip 61 clamped on the plastic insulating member 51, the U-shaped protruding strip 61 extends in a certain arc, and the U-shaped protruding strip with an arc design is beneficial to increase the supporting contact surface with the movable spring. In order to reliably realize the installation of U-shaped sand grip on insulating plastic part 51 is fixed, the shaping has installation base 52 on insulating plastic part 51, and the length direction extension setting along installation base is in spacing slot 9 on the installation base, spacing slot 9 is including extending to the open end 91 of installation base one end, and be subject to the closed end 82 of the installation base other end, and set up in spacing lug 93 that links to each other with the closed end in the slot, open end 91 is the horn mouth shape towards open mouth, U-shaped sand grip 61 is gone into from the lateral direction card of open end department in spacing slot 9 and the enclosure is pressed from both sides tightly spacing lug 93, be provided with the joint structure that keeps the two fixed relative position between U-shaped sand grip 61 and the spacing slot, this kind of mounting structure sets up, the mode card that the U-shaped sand grip adopted the side direction installation is gone into in spacing slot to through the joint structure with spacing slot forms the joint cooperation, thereby play installation limiting displacement to the inside and outside face of U-shaped sand grip respectively through spacing slot and spacing lug, the installation is comparatively convenient, effectively prevents the U-shaped sand grip from in the fastening the slot, the installation is more reliable.

As shown in fig. 5, the joint structure including set up in closed end 92 just is located two first draw-in grooves of spacing lug 93 both sides with set up in two second draw-in grooves 94 of open end 91 both sides lateral wall, still including setting up two fixed buckles 62 of U-shaped sand grip 61 one end and cooperation joint in two first draw-in grooves to and be the slope form setting and be in two elastic buckle 63 of U-shaped sand grip other end and cooperation joint in two second draw-in grooves, elastic buckle 63 is in the U-shaped sand grip inserts spacing slot in-process pressurized elastic deformation works as the U-shaped sand grip inserts the back that targets in place, just in time makes fixed buckle card supports in first draw-in groove, makes simultaneously elastic buckle deformation opens the card and supports in the second draw-in groove to be in the U-shaped sand grip play spacing installation effect in the spacing slot, the installation fastening is reliable, design all carry out reliable installation spacing with the U-shaped sand grip all around, make spacing slot with form many spacing stuck point positions between the U-shaped sand grip, increase the installation contact surface, avoid taking place the pine and take off the phenomenon, installation stability is good.

As a deformation mounting means of U-shaped sand grip, refer to fig. 6, the shaping has installation boss 52 on the insulating piece 51, and is direct be in be provided with two bar draw-in grooves 53 on the installation boss 52, two side joints of U-shaped sand grip 61 are two in the bar draw-in groove 53, this kind of joint mounting means is simple, and the cooperation is fixed reliable.

Although the driving protrusion is preferably arranged in the U-shaped protruding strip, obviously, the driving protrusion is not limited to the U-shaped protruding strip, and other different arrangement manners are possible, referring to fig. 7, the driving protrusion 6 is a circular protrusion riveted on the insulating plastic 51, the insulating plastic 51 is correspondingly provided with a riveting hole for connecting the circular protrusion, the top of the circular protrusion is provided with an arc surface, and the circular protrusion is fixed on the insulating plastic 51 by adopting a riveting process, so that the advantages of high connection strength and good tightness are achieved. In addition, the driving protrusion 6 may preferably be a V-shaped insertion piece (not shown in the drawings) inserted into the insulating plastic part 51, and two insertion slots for tightly inserting the V-shaped insertion piece are also formed in the mounting boss of the insulating plastic part, so that the two pins of the V-shaped insertion piece are fixed in the two insertion slots, and the mounting and the fixing can be realized. Those skilled in the art can select a specific arrangement manner of the driving protrusion according to the above description, and further description of other equivalent embodiments is omitted here.

The specific arrangement of the magnetic circuit assembly is described in detail below with reference to fig. 1-3:

the magnetic circuit assembly 4 comprises an electromagnetic coil 41 and a yoke 42 which are installed in the lower chamber 12, the armature structure is connected to one end of the yoke 42 in a swinging mode, a reed structure 43 is arranged between the yoke 42 and the armature structure 5, the reed structure 43 applies a biasing force to the armature structure to swing towards the side far away from the movable reed 2, and when the magnetic circuit assembly 4 is powered off and loses the electromagnetic force, the armature structure 5 is driven by the movable reed 2 to swing in a resetting mode, so that the driving protrusion 6 is driven to swing towards the side far away from the movable reed 2. In order to ensure the stability and reliability of the installation of the magnetic circuit assembly 4 in the lower chamber 12, the upper side of the lower chamber 12 is provided with a plurality of upper limit grooves 14 for positioning the yoke 42, the lower side of the lower chamber 12 is provided with two lower limit grooves 15 suitable for two terminal pins of the electromagnetic coil 41 to penetrate out of the bottom of the pedestal, and the magnetic circuit assembly 4 is subjected to limit installation in the lower chamber 12 through the matching of the upper limit grooves and the yoke and the lower limit grooves and the terminal pins, so that the position shaking and the offset of the magnetic circuit assembly are prevented, and the installation is stable and reliable.

As shown in fig. 2, the movable contact piece 2 and the static contact piece 3 respectively include a movable conductive plate 21 and a static conductive plate 31 which are bent to extend to the rear side surface of the base frame 1, the movable conductive plate 21 and the movable contact piece 2 are riveted together by rivets, the static conductive plate 31 and the static contact piece 3 are integrally formed by bending, the movable conductive plate 21 and the static conductive plate 31 extend in parallel to the bottom of the base frame 1, the rear side surface of the base frame 1 is provided with two sets of positioning block assemblies 8 for positioning and connecting the movable conductive plate 21 and the static conductive plate 31, and the movable conductive plate 21 and the static conductive plate 31 are respectively and correspondingly provided with positioning holes which are matched with the positioning block assemblies to stably and reliably position and install the movable conductive plate and the static conductive plate on the rear side surface of the base frame.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. A small-sized electromagnetic relay with a high contact stroke is characterized by comprising:

the pedestal (1) is provided with an installation cavity formed by connecting an upper cavity (11) and a lower cavity (12);

the contact assembly comprises a movable spring (2) extending in the length direction of the base frame (1) and penetrating through the upper chamber (11), and a static contact piece (3) erected above the movable spring (2) and connected to the top of the base frame (1), wherein one end of the movable spring (2) opposite to the static contact piece (3) is correspondingly provided with a group of contacts;

the driving device is arranged in the mounting cavity and comprises a magnetic circuit component (4) arranged in the lower cavity (12) and an armature structure (5) capable of being arranged on the magnetic circuit component (4) in a swinging mode, the armature structure (5) penetrates into the upper cavity (11) and is arranged opposite to the movable contact spring (2), one end of the armature structure (5) is provided with a driving protrusion (6) protruding towards one side of the movable contact spring (2), and the armature structure (5) drives the driving protrusion (6) to push the movable contact spring to be in contact with a group of contacts of the static contact spring when swinging towards one side of the movable contact spring.

2. The high contact stroke miniature electromagnetic relay of claim 1, wherein: the opening of the mounting cavity is formed in the front side face of the base frame (1), so that the magnetic circuit assembly and the armature structure are laterally installed into the mounting cavity through the opening, and the side edge, facing the opening, of the movable spring piece (2) is provided with a guide bevel edge (7) which tilts and tilts corresponding to the driving protrusion.

3. The high contact stroke small electromagnetic relay according to claim 2, characterized in that: armature structure (5) include the armature body and set up armature body one end on insulating piece (51) of moulding, bed frame (1) is including extending movable reed (2) and armature body between the baffle structure, the one end of baffle structure is provided with inclined plane structure (13), drive protruding (6) integrated into one piece or fix on insulating piece (51) of moulding to be located the inclined plane structure outside.

4. A high contact stroke small electromagnetic relay according to claim 3, characterized in that: the drive protrusion (6) is in a clamped connection with a U-shaped raised line (61) on the insulating plastic part (51), and the U-shaped raised line (61) extends in a certain radian.

5. The high contact stroke miniature electromagnetic relay of claim 4, wherein: insulating mould piece (51) go up the shaping and have installation base (52), and the length direction extension setting along installation base is in spacing slot (9) on the installation base, spacing slot (9) are including extending to the open end (91) of installation base one end, and be subject to the closed end (92) of the installation base other end, and set up in spacing lug (93) that link to each other with the closed end in the spacing slot, open end (91) are horn mouth shape towards open chamber mouth, U-shaped sand grip (61) are gone into from open end department side direction card in spacing slot (9) and surround and press from both sides tightly spacing lug (93), be provided with between U-shaped sand grip (61) and the spacing slot and keep the fixed joint structure of the two relative position.

6. The high contact travel miniature electromagnetic relay of claim 5, wherein: the joint structure including set up in closed end (92) and be located two first draw-in grooves of spacing lug (93) both sides with set up in two second draw-in grooves (94) of open end (91) both sides lateral wall, still including setting up U-shaped sand grip (61) one end and two fixed buckles (62) of cooperation joint in two first draw-in grooves to and be the slope form and set up U-shaped sand grip other end and two elasticity buckle (63) of cooperation joint in two second draw-in grooves.

7. The high contact travel miniature electromagnetic relay of claim 4, wherein: two strip-shaped clamping grooves (53) are formed in a mounting boss (52) of the insulating plastic part (51), and two side edges of the U-shaped raised line (61) are vertically clamped in the two strip-shaped clamping grooves (53) respectively.

8. A high contact stroke small electromagnetic relay according to claim 3, characterized in that: the driving bulge (6) is a circular boss riveted on the insulating plastic part (51); or the driving bulge (6) is a V-shaped inserting sheet which is tightly matched and inserted on the insulating plastic part (51).

9. A small-sized electromagnetic relay with a high contact stroke according to any one of claims 1 to 8, characterized in that: the magnetic circuit assembly (4) comprises an electromagnetic coil (41) and a yoke iron (42) which are installed in the lower chamber (12), the armature structure is connected to one end of the yoke iron (42) in a swinging mode, a reed structure (43) is arranged between the yoke iron (42) and the armature structure (5), and the reed structure (43) applies a biasing force to the armature structure in a swinging mode towards the side far away from the movable reed (2); the upper side of the lower chamber (12) is provided with a plurality of upper limiting grooves (14) for positioning the yoke (42), and the lower side of the lower chamber (12) is provided with two lower limiting grooves (15) suitable for two terminal pins of the electromagnetic coil (41) to penetrate out of the bottom of the base frame.

10. The high contact travel miniature electromagnetic relay of claim 9, wherein: the movable contact spring (2) and the static contact spring (3) respectively comprise a movable conductive plate (21) and a static conductive plate (31) which are bent and extend to the rear side surface of the base frame (1), and the movable conductive plate (21) and the static conductive plate (31) extend out of the bottom of the base frame (1) in parallel; and the rear side surface of the base frame (1) is provided with two groups of positioning block assemblies (8) which are connected with the movable conductive plate (21) and the static conductive plate (31) in a positioning manner.