CN210984640U - Pushing mechanism of relay - Google Patents

Abstract

The utility model relates to the technical field of relays, in particular to a pushing mechanism of a relay with low production cost and high assembly efficiency, which comprises a shell, a movable contact bridge, an insulating sleeve, a pressure spring and a pushing rod, wherein the shell is provided with a containing groove, and a limiting convex rib is arranged in the containing groove; the movable contact bridge is accommodated in the accommodating groove and is abutted against the limiting convex rib, and a through hole is formed in the movable contact bridge; insulating cover includes base, loop bar and stopper, and the both ends of loop bar are connected with base and stopper respectively, and the opening of the neighbouring storage tank of base and with the internal surface looks butt of storage tank, loop bar and stopper wear to establish the through-hole according to the preface and with movable contact bridge sliding connection, the length of stopper is greater than the width of through-hole, the stopper be used for the atress produce rotate and with the movable contact bridge on the one side looks butt of the bottom of neighbouring storage tank. The pressure spring is sleeved on the loop bar and is respectively abutted with the base and the movable contact bridge. The catch bar is connected with the base and is used for driving the insulating sleeve to move or rotate relative to the movable contact bridge.

Description

Pushing mechanism of relay

Technical Field

The utility model relates to a relay technical field especially relates to a pushing mechanism of relay.

Background

A relay is also called a relay, and is an electronic control device having an input circuit and an output circuit, which is usually applied in an automatic control circuit to control a larger current through a smaller current, so as to achieve the functions of automatic adjustment, safety protection, and switching circuit of the circuit. The direct-current relay is a relay which works by adopting direct current, is mainly applied to protecting an interlocking system, can trigger a protection loop even if a station-service alternating-current power supply loses power, and certainly, a contact of the direct-current relay can also be a direct-current system; the direct current relay is also applied to high-power occasions, and the electromagnetic force generated by the direct current relay is larger, so that the control of a main loop is facilitated; in addition, the dc relay is also applied to some occasions where only dc current can be used, such as automobile power utilization, to realize the effective operation of equipment.

However, the conventional dc relay mainly includes dc relays of the following two types of structures, one type of dc relay mainly includes a movable contact bridge, a push rod, an insulating sleeve, a pressure spring, a guide piece, an upper stop motion piece and a movable iron core, wherein the push rod, the guide piece and the insulating sleeve are an integral structure formed in an integrated injection molding manner, the upper stop motion piece is inserted after the pressure spring and the movable contact bridge are sequentially installed, and then the upper stop motion piece is riveted, the structure of the type of dc relay is complex, many parts are provided, so that the production cost of the dc relay is high, and the riveting process requirement of the upper stop motion piece and the guide piece is high, the overall assembly efficiency of the dc relay is not high, and further the production efficiency of the dc relay is influenced. Another kind of direct current relay mainly includes parts such as movable contact bridge, catch bar, insulating cover and compression spring, and wherein the integral structure that catch bar and insulating cover formed for integrative injection moulding mode through pack into the insulating cover with the movable contact bridge earlier, pack into insulating cover with compression spring and with movable contact bridge looks butt afterwards, realize direct current relay's assembly promptly, the insulating cover volume of this kind of direct current relay is less, has increased compression spring's the assembly degree of difficulty, direct current relay's whole assembly efficiency is not high.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide a pushing mechanism for a relay, which aims at the technical problems of high production cost and low assembly efficiency.

The utility model provides an actuating mechanism of relay, this actuating mechanism of relay include casing, movable contact bridge, insulating cover, pressure spring and catch bar, the storage tank has been seted up to the casing, be provided with spacing protruding muscle in the storage tank, spacing protruding muscle is followed the depth direction of storage tank sets up. The movable contact bridge is contained in the containing groove and is abutted against the limiting convex rib, and a through hole is formed in the movable contact bridge. The insulation sleeve comprises a base, a sleeve rod and a limiting block, the base is connected with one end of the sleeve rod, the limiting block is connected with the other end of the sleeve rod, the base is adjacent to the opening of the accommodating groove and is abutted to the inner surface of the accommodating groove, the movable contact bridge sequentially penetrates through the limiting block and the sleeve rod and is slidably connected with the sleeve rod, the width of the through hole is smaller than the length of the limiting block, and the movable contact bridge is stressed to rotate relative to the limiting block and is abutted to the limiting block. The pressure spring is sleeved on the loop bar and is respectively abutted against the base and one surface of the movable contact bridge, which is back to the bottom of the accommodating groove. The pushing rod is connected with one surface, back to the containing groove, of the base, the tail end of the pushing rod is used for being connected with an external movable iron core, and the pushing rod is used for bearing force and driving the movable contact bridge to be close to or far away from an external static contact bridge.

In one embodiment, the base is provided with a guide piece, and the guide piece is inserted into the accommodating groove and is respectively abutted against the limiting convex rib and the inner surface of the accommodating groove.

In one embodiment, the number of the limiting convex ribs is at least two, and the guide piece is positioned between two adjacent limiting convex ribs and is respectively abutted against the two limiting convex ribs.

In one embodiment, the number of the limiting convex ribs is four, two of the limiting convex ribs are arranged on the same inner side surface of the shell in parallel, the other two of the limiting convex ribs are arranged on the shell in parallel and located on opposite surfaces of the inner side surface, two sides of the base are respectively provided with one guide piece, one guide piece is located between the two limiting convex ribs and is respectively abutted against the two limiting convex ribs, and the other guide piece is located between the other two limiting convex ribs and is respectively abutted against the other two limiting convex ribs.

In one embodiment, the guide plate is integrally injection molded with the base.

In one embodiment, the through hole is opened in the center of the movable contact bridge.

In one embodiment, the cross-sectional structure of the limiting block is adapted to the hole shape of the through hole.

In one embodiment, a limiting ring is arranged on the base, and the pressure spring is sleeved on the limiting ring and abuts against the base.

In one embodiment, a pair of lugs is symmetrically arranged on two sides of the base, and the two lugs are respectively abutted against the inner surface of the accommodating groove.

In one embodiment, the base and the push rod are integrally injection molded.

According to the pushing mechanism of the relay, the pressure spring and the movable contact bridge sequentially penetrate through the loop bar, then the movable contact bridge is rotated, the movable contact bridge is twisted relative to the limiting block, so that the limiting block is abutted to the edge of the through hole of the movable contact bridge, and the limiting block is always connected with the movable contact bridge under the constraint of the edge of the through hole, so that the movable contact bridge and the insulating sleeve are assembled in the shell, the assembling process is simple and easy, the assembling efficiency and the production efficiency of the relay are effectively improved, and the market competitiveness of a product is further improved; in addition, this pushing mechanism is only by part subassemblies such as casing, movable contact bridge, insulating cover, pressure spring and catch bar, and its simple structure, spare part are less, are favorable to reducing the manufacturing cost of relay to the market competition of product has further been improved.

Drawings

FIG. 1 is a schematic diagram of a pushing mechanism of a relay in one embodiment;

FIG. 2 is an exploded view of the pushing mechanism of the relay in one embodiment;

FIG. 3 is a schematic diagram of another perspective of the pushing mechanism of the relay in the embodiment of FIG. 1;

FIG. 4 is a schematic cross-sectional view taken along the direction A-A in the embodiment shown in FIG. 3;

FIG. 5 is a schematic structural view of a housing in one embodiment;

FIG. 6 is a schematic diagram showing a positional relationship among the movable contact bridge, the insulating sleeve, the pressure spring, and the rotating lever in a first state according to an embodiment of the present invention;

FIG. 7 is a schematic diagram showing the positional relationship among the movable contact bridge, the insulating sleeve, the pressure spring, and the rotating lever in another state according to an embodiment;

fig. 8 is a schematic structural view of an insulating sheath in another embodiment.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 to 7, the present invention provides a relay pushing mechanism 10, in which the relay pushing mechanism 10 includes a housing 100, a movable contact bridge 200, an insulating sleeve 300, a pressure spring 400 and a pushing rod 500, the housing 100 has a receiving groove 110, a limiting protruding rib 120 is disposed in the receiving groove 110, and the limiting protruding rib 120 is disposed along a depth direction of the receiving groove 110. The movable contact bridge 200 is accommodated in the accommodating groove 110 and is abutted to the limiting convex rib 120, and a through hole 210 is formed in the movable contact bridge 200. The insulating sleeve 300 comprises a base 310, a sleeve rod 320 and a limiting block 330, wherein the base 310 is connected with one end of the sleeve rod 320, the limiting block 330 is connected with the other end of the sleeve rod 320, the base 310 is adjacent to the opening of the accommodating groove 110 and is abutted against the inner surface of the accommodating groove 110, the movable contact bridge 200 sequentially penetrates through the limiting block 330 and the sleeve rod 320 and is slidably connected with the sleeve rod 320, the width of the through hole 210 is smaller than the length of the limiting block 330, and the movable contact bridge 200 is stressed to rotate relative to the limiting block 330 and is abutted against the limiting block 330. The pressure spring 400 is sleeved on the sleeve rod 320 and is respectively abutted against the base 310 and one surface of the movable contact bridge 200, which is back to the bottom of the accommodating groove 110. The push rod 500 is connected to a surface of the base 310 opposite to the receiving groove 110, the end of the push rod 500 is used for connecting to an external movable iron core, and the push rod 500 is used for receiving a force and driving the movable contact bridge 200 to approach or leave the external stationary contact bridge.

According to the pushing mechanism 10 of the relay, the pressure spring 400 and the movable contact bridge 200 sequentially penetrate through the sleeve rod 320, then the movable contact bridge 200 is rotated, the movable contact bridge 200 is twisted relative to the limiting block 330, so that the limiting block 330 is abutted to the edge of the through hole 210 of the movable contact bridge 200, the limiting block 330 is always connected with the movable contact bridge 200 under the constraint of the edge of the through hole 210, and the assembly of the movable contact bridge 200 and the insulating sleeve 300 in the shell 100 is realized, the assembly process is simple and easy to implement, the assembly efficiency and the production efficiency of the relay are effectively improved, and the market competitiveness of products is further improved; in addition, the pushing mechanism is only composed of the shell 100, the movable contact bridge 200, the insulating sleeve 300, the pressure spring 400, the pushing rod 500 and other components, the structure is simple, the number of parts is small, the production cost of the relay is reduced, and the market competitiveness of products is further improved.

The assembly process of the pushing mechanism of the relay comprises the following steps: the pressure spring 400 is sleeved on the loop bar 320 of the insulating sleeve 300, one end of the pressure spring 400 abuts against the base 310, then the through hole 210 of the movable contact bridge 200 is penetrated through the limit block 330 of the insulating sleeve 300 sleeved with the pressure spring 400, so that the movable contact bridge 200 is sleeved on the loop bar 320, the other end of the pressure spring 400 abuts against one surface, adjacent to the base 310, of the movable contact bridge 200, in the process, the pressure spring 400 is compressed under the co-extrusion action of the base 310 and the movable contact bridge 200, and the elastic potential energy of the pressure spring 400 gradually rises. By rotating the movable contact bridge 200, the movable contact bridge 200 rotates relative to the limiting block 330 until the limiting block 330 abuts against the edge of the through hole 210 of the movable contact bridge 200, and then the movable contact bridge 200 is released, under which the elastic potential energy of the pressure spring 400 is converted into the kinetic energy of the pressure spring 400, or it can be understood that the pressure spring 400 recovers the elastic deformation and abuts against the base 310 and the movable contact bridge 200 respectively, so that the movable contact bridge 200 compresses the limiting block 330, that is, the stable connection between the movable contact bridge 200 and the insulating sleeve 300 is realized. After the movable contact bridge 200 and the insulating sleeve 300 are assembled, a connecting body formed by the movable contact bridge 200 and the insulating sleeve 300 is inserted into the accommodating groove 110 of the casing 100, and the side surface of the base 310 is abutted to the limiting convex rib 120, so that the base 310 is difficult to rotate in the horizontal direction under the constraint of the limiting convex rib 120, and it can also be understood that the insulating sleeve 300 is difficult to further rotate relative to the movable contact bridge 200, thereby ensuring the stability and reliability of the connection between the movable contact bridge 200 and the insulating sleeve 300.

The housing 100 is used for accommodating the movable contact bridge 200, the insulating sleeve 300, the pressure spring 400 and other components, and the movable contact bridge 200, the insulating sleeve 300, the pressure spring 400 and other components are encapsulated, so that the integration of the relay is improved, the overall volume of the relay is reduced, the components can be separated from the environment, the arc generated in the working process of the relay is prevented from transferring, even a fire is caused, and the safety protection of the movable contact bridge 200, the insulating sleeve 300, the pressure spring 400 and other components and environmental elements is realized. It should be noted that, by providing the limiting convex rib 120 on the inner surface of the housing 100, after the movable contact bridge 200 is inserted into the accommodating groove 110, the outer surface of the movable contact bridge 200 is difficult to rotate in the horizontal direction under the constraint of the limiting convex rib 120, that is, the limiting convex rib 120 is used for limiting the rotational freedom of the movable contact bridge 200 in the horizontal direction, so that the stability of connecting the movable contact bridge 200 and the housing 100 is improved.

The movable contact bridge 200 is an important component of the relay device, and is used for being connected with or disconnected from a stationary contact bridge of the relay device under a stress condition to realize the connection and disconnection of a line at the position of the relay device, so that the purpose of controlling a circuit is achieved. It should be noted that, through the through hole 210 formed in the movable contact bridge 200, a path is provided for the penetration of the insulating sleeve 300, that is, the movable contact bridge 200 is facilitated to penetrate the limiting block 330 and the sleeve rod 320 until the movable contact bridge 200 rotates under stress and abuts against the limiting block 330, that is, the installation and the setting of the movable contact bridge 200 on the insulating sleeve 300 are realized. In an embodiment, the through hole 210 is disposed at the center of the movable contact bridge 200, so that when the insulating sleeve 300 is inserted into the through hole 210 and the limiting block 330 of the insulating sleeve 300 abuts against the edge of the through hole 210, the mass of two sides of the movable contact bridge 200 centering on the insulating sleeve 300 is the same, so that the moment generated at the abutting position of the movable contact bridge 200 and the insulating sleeve 300 at two sides of the movable contact bridge 200 centering on the insulating sleeve 300 is the same, and the stress at the connecting position of the movable contact bridge 200 and the insulating sleeve 300 is balanced, thereby ensuring the stability of the connection of the movable contact bridge 200 and the insulating sleeve 300.

The insulating sleeve 300 is used for connecting the push rod 500 and the movable contact bridge 200 and blocking electric charges on the movable contact bridge 200 from migrating to the push rod 500, so as to ensure the insulation of the push rod 500 and the reliability of the control function of the relay circuit. The base 310 is used for installing the push rod 500 and receiving the loop bar 320 and the pressure spring 400 respectively, so as to implement the installation of the above components. In one embodiment, the base 310 is provided with a limiting ring 311, and the pressure spring 400 is sleeved on the limiting ring 311 and abuts against the base 310. Through set up spacing ring 311 on base 310, spacing ring 311 can be injectd pressure spring 400's mounted position, prevents that pressure spring 400 cover from locating behind loop bar 320 for loop bar 320 produce the skew or rock, when guaranteeing pressure spring 400 and loop bar 320 stable connection, has promoted pressure spring 400's installation effectiveness. In addition, through setting up spacing ring 311 on base 310, in pushing mechanism's assembling process, pressure spring 400 cover only with insulating cover 300's base 310 butt behind the spacing ring 311, pressure spring 400 does not produce relative motion with base 310 under the restraint of spacing ring 311, avoided producing the piece because of the corner scraping insulating cover 300 of pressure spring 400, that is to say, eliminated because of insulating cover 300 piece adheres to the contact on the contact the electric conductive property decline problem of contact that arouses to guaranteed the effective use of relay.

Referring to fig. 6, 7 and 8, in an embodiment, the base 310 is provided with a guide piece 312, and the guide piece 312 is inserted into the accommodating groove 110 and abuts against the limiting convex rib 120 and the inner surface of the accommodating groove 110. By arranging the guide piece 312 on the base 310, in the process of assembling the connecting body of the movable contact bridge 200 and the insulating sleeve 300 to the housing 100, the connecting body of the movable contact bridge 200 and the insulating sleeve 300 is only inserted along the gap between the limiting convex rib 120 adapted to the width of the guide piece 312 and the inner surface of the accommodating groove 110, that is, the installation path of the connecting body of the movable contact bridge 200 and the insulating sleeve 300 is uniquely determined, so that the problem of assembly error of the pushing mechanism is avoided, and the assembly efficiency of the pushing mechanism is improved. In one embodiment, the guide piece 312 and the base 310 are integrally injection molded. Through making the guide vane 312 and base 310 integral type injection moulding, improved the stability that guide vane 312 and base 310 are connected, the guide vane 312 is difficult for droing from base 310 to the reliability of guide vane 312 has been guaranteed and its life has been prolonged.

In one embodiment, the number of the limiting ribs 120 is at least two, and the guiding piece 312 is located between two adjacent limiting ribs 120 and is abutted to the two limiting ribs 120 respectively. Preferably, the number of the limiting convex ribs 120 is four, two limiting convex ribs 120 are arranged on the same inner side surface of the casing 100 in parallel, the other two limiting convex ribs 120 are arranged on the casing 100 in parallel and located on opposite surfaces of the inner side surface, two sides of the base 310 are respectively provided with a guide piece 312, one guide piece 312 is located between the two limiting convex ribs 120 and respectively abutted to the two limiting convex ribs 120, and the other guide piece 312 is located between the other two limiting convex ribs 120 and respectively abutted to the other two limiting convex ribs 120. It can be understood that the plurality of limiting ribs 120 are uniformly and symmetrically disposed on two opposite inner surfaces of the receiving groove 110, so that, in the assembling process of the movable contact bridge 200 and the insulating sleeve 300 connector, the guide piece 312 is only abutted against the limiting ribs 120, thereby preventing the guide piece 312 from wearing the housing 100, and being beneficial to prolonging the service life of the housing 100. And the guide piece 312 on one side of the base 310 is respectively abutted against the two limiting convex ribs 120, so that the guide piece 312 on the other side of the base 310 is respectively abutted against the other two limiting convex ribs 120, the connection area of the two side surfaces of the base 310 and the limiting convex ribs 120 is the same, that is, the acting force of the two side surfaces of the base 310 facing the inner surface of the shell 100 is the same, thereby ensuring the stability of the connection of the insulating sleeve 300 and the shell 100.

Referring to fig. 6, 7 and 8, in an embodiment, a pair of protruding lugs 313 are symmetrically disposed on two sides of the base 310, and the two protruding lugs 313 are respectively abutted against the inner surface of the receiving groove 110. Preferably, the two lugs 313 are respectively abutted against the limiting ribs 120 disposed on the inner surface of the receiving groove 110. By symmetrically arranging the pair of lugs 313 on the two sides of the base 310, when the connecting body of the movable contact bridge 200 and the insulating sleeve 300 is assembled on the casing 100, the two lugs 313 respectively abut against the limiting convex ribs 120 on the two opposite inner side surfaces in the accommodating groove 110, that is, the limiting convex ribs 120 limit the rotation of the base 310 in the horizontal direction, in other words, the limiting convex ribs 120 limit the rotation of the insulating sleeve 300 in the horizontal direction, so that the stability of the structure of the pushing mechanism is ensured.

The loop bar 320 is used for penetrating the pressure spring 400 and limiting the pressure spring 400, so that the pressure spring 400 is prevented from shaking in the horizontal direction, and the stability of the structure of the pushing mechanism is improved. The limiting block 330 is used for limiting the position of the moving contact bridge 200 after rotation, that is, after the limiting block 330 abuts against the edge of the through hole 210 of the moving contact bridge 200, the moving contact bridge 200 can be prevented from further moving, so that the connection between the insulating sleeve 300 and the moving contact bridge 200 is realized, and thus, the moving contact bridge 200 is difficult to move along the depth direction of the accommodating groove 110 under the constraint of the limiting block 330, that is, the degree of freedom of the moving contact bridge 200 along the depth direction of the accommodating groove 110 is limited, and the stability of the structure of the pushing mechanism is further improved. In one embodiment, the cross-sectional configuration of the stop 330 is adapted to the shape of the through-hole 210. It can also be understood that the outer contour of the limiting block 330 is identical to the inner surface of the through hole 210, so that the scraping of the limiting block 330 and the inner surface of the through hole 210 can be reduced in the process that the limiting block 330 penetrates through the through hole 210, that is, the resistance of the limiting block 330 penetrating through the through hole 210 is reduced, thereby reducing the installation difficulty of the insulating sleeve 300. It should be noted that, in actual production, it is not necessary to require that the hole shape of the through hole 210 is completely the same as the cross sectional structure of the limiting block 330, that is, the hole shape of the through hole 210 is the same as the cross sectional structure of the limiting block 330, which is only a preferred embodiment of the present invention, it is only necessary to ensure that the length of the limiting block 330 is greater than the width of the through hole 210, that is, under the condition that the edge of the through hole 210 of the movable contact bridge 200 after rotation is abutted against the limiting block 330, the transverse dimension and the longitudinal dimension of the limiting block 330 are smaller than the transverse dimension and the longitudinal dimension of the through hole 210, so as to facilitate the through hole 210 to be penetrated by the limiting block 330, the shape of the limiting block 330 and the hole shape of the through hole 210 can be determined according to production conditions and production habits.

It should be noted that, in one embodiment, the base 310, the sleeve 320 and the limiting block 330 are integrally formed. Through making base 310 and loop bar 320 and stopper 330 integral type shaping, increased the stability that base 310 and loop bar 320 and stopper 330 are connected, prevent in the assembling process of insulating cover 300 and movable contact bridge 200, too big because of the effort of pressure spring 400 to movable contact bridge 200, and then make movable contact bridge 200 exceed the effort between stopper 330 and the loop bar 320 to the thrust of stopper 330, cause the emergence of the stopper 330 condition of droing from loop bar 320. In other words, the stability of the structure of the insulating sleeve 300 and the firmness of the assembly of the insulating sleeve 300 and the movable contact bridge 200 are improved, and the effective use of the relay is ensured.

The pressure spring 400 is used for pressing the movable contact bridge 200 under a pressed condition, so that the movable contact bridge 200 is abutted to the limit block 330 of the insulating sleeve 300, and the movable contact bridge 200 is limited along the length direction of the sleeve rod 320. That is, the movable contact bridge 200 is always connected to the insulating sleeve 300 under the common constraint of the limiting block 330 and the pressure spring 400, and the movable contact bridge 200 is not easy to deflect relative to the insulating sleeve 300, so that the reliability of assembling the movable contact bridge 200 and the insulating sleeve 300 is ensured. The push rod 500 is used for bearing force and driving the insulating sleeve 300 to move straightly so as to drive the movable contact bridge 200 to be close to or far away from an external static contact bridge, so that the on-off of a circuit is realized. In an embodiment, the end of the push rod 500 is used for being fixedly connected with an external movable iron core in a welding or riveting manner, so that when the movable iron core is acted by an external electromagnetic force, the movable iron core drives the push rod 500 to move towards a direction close to the movable contact bridge 200 or away from the movable contact bridge 200, so as to facilitate the connection or disconnection of the movable contact bridge 200 and a static contact bridge of a relay device, thereby realizing the connection or disconnection of a circuit. In one embodiment, the base 310 and the push rod 500 are integrally injection molded. The base 310 and the push rod 500 are integrally injection-molded, so that the connection stability of the base 310 and the push rod 500 is improved, and thus, the movable iron core and the push rod 500 can only control the movement mode of the trolley bridge 200 under the condition that the movable iron core moves by adjusting external electromagnetic force, thereby ensuring the reliability of the push mechanism.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A pushing mechanism of a relay is characterized by comprising a shell, a movable contact bridge, an insulating sleeve, a pressure spring and a pushing rod,

the shell is provided with a containing groove, a limiting convex rib is arranged in the containing groove, and the limiting convex rib is arranged along the depth direction of the containing groove;

the movable contact bridge is accommodated in the accommodating groove and is abutted against the limiting convex rib, and a through hole is formed in the movable contact bridge;

the insulation sleeve comprises a base, a sleeve rod and a limiting block, the base is connected with one end of the sleeve rod, the limiting block is connected with the other end of the sleeve rod, the base is adjacent to the opening of the accommodating groove and is abutted against the inner surface of the accommodating groove, the movable contact bridge sequentially penetrates through the limiting block and the sleeve rod and is in sliding connection with the sleeve rod, the width of the through hole is smaller than the length of the limiting block, and the movable contact bridge is used for being stressed to rotate relative to the limiting block and is abutted against the limiting block;

the pressure spring is sleeved on the loop bar and is respectively abutted against the base and one surface of the movable contact bridge, which is back to the bottom of the accommodating groove;

the pushing rod is connected with one surface, back to the containing groove, of the base, the tail end of the pushing rod is used for being connected with an external movable iron core, and the pushing rod is used for bearing force and driving the movable contact bridge to be close to or far away from an external static contact bridge.

2. The relay pushing mechanism as claimed in claim 1, wherein the base is provided with a guide piece, and the guide piece is inserted into the receiving groove and abuts against the limiting rib and the inner surface of the receiving groove respectively.

3. The relay pushing mechanism as claimed in claim 2, wherein the number of the limiting ribs is at least two, and the guide piece is located between two adjacent limiting ribs and is abutted against the two limiting ribs respectively.

4. The pushing mechanism of the relay according to claim 2, wherein the number of the limiting ribs is four, two of the limiting ribs are arranged in parallel on the same inner side surface of the housing, the other two limiting ribs are arranged in parallel on the housing and located on opposite surfaces of the inner side surface, two sides of the base are respectively provided with one of the guide pieces, one of the guide pieces is located between the two limiting ribs and respectively abutted against the two limiting ribs, and the other guide piece is located between the other two limiting ribs and respectively abutted against the other two limiting ribs.

5. The relay pushing mechanism according to any one of claims 2 to 4, wherein the guide piece is integrally injection-molded with the base.

6. The relay pushing mechanism according to claim 1, wherein the through hole is opened in a central portion of the movable contact bridge.

7. The relay pushing mechanism according to claim 1, wherein the cross-sectional structure of the stopper corresponds to the hole shape of the through hole.

8. The relay pushing mechanism as claimed in claim 1, wherein a limiting ring is disposed on the base, and the pressure spring is sleeved on the limiting ring and abuts against the base.

9. The relay pushing mechanism as claimed in claim 1, wherein a pair of lugs are symmetrically disposed on two sides of the base, and the two lugs are respectively abutted against the inner surfaces of the receiving grooves.

10. The relay push mechanism as claimed in claim 1, wherein the base is injection molded integrally with the push rod.

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