阅读说明：本技术 一种外壳高强度固接式电磁继电器 (Shell high strength rigid coupling formula electromagnetic relay ) 是由 唐俊平 于 2021-02-07 设计创作，主要内容包括：本发明涉及继电器技术领域,尤其涉及一种外壳高强度固接式电磁继电器,包括固定架,固定架设置有电磁铁组件、触点组件以及推动组件,触点组件包括第一静触头与第二静触头,电磁铁组件用于驱动推动组件移动,推动组件驱动第一静触头与第二静触头导通或断开,固定架外部设置有顶壳以及与顶壳可拆卸连接的底壳,顶壳外壁设置有插接槽与卡块,底壳外壁设置有插接块与卡孔,插接块对应插接于插接槽内促使卡孔与卡块匹配卡接,顶壳外侧设置有定位块,底壳外侧设置有与定位块匹配连接的定位槽,顶壳内壁凸设有定位件,定位件与触点组件抵接,结构紧凑且设计合理,采用无螺钉固定方式以实现继电器牢固地组装在一起,提升继电器的组装效率与固接强度。(The invention relates to the technical field of relays, in particular to a high-strength fixedly-connected electromagnetic relay with a shell, which comprises a fixed frame, wherein the fixed frame is provided with an electromagnet assembly, a contact assembly and a pushing assembly, the contact assembly comprises a first fixed contact and a second fixed contact, the electromagnet assembly is used for driving the pushing assembly to move, the pushing assembly drives the first fixed contact and the second fixed contact to be connected or disconnected, the fixed frame is externally provided with a top shell and a bottom shell detachably connected with the top shell, the outer wall of the top shell is provided with an inserting groove and a fixture block, the outer wall of the bottom shell is provided with an inserting block and a fixture hole, the inserting block is correspondingly inserted into the inserting groove to enable the fixture hole to be matched and clamped with the fixture block, the outer side of the top shell is provided with a positioning block, the outer side of the bottom shell is provided, the relay is firmly assembled together by adopting a screw-free fixing mode, and the assembling efficiency and the fixing strength of the relay are improved.)

1. The utility model provides a shell high strength rigid coupling formula electromagnetic relay, includes the mount, the mount is provided with the promotion subassembly that electromagnet assembly, contact subassembly and activity set up, the contact subassembly includes first static contact and second static contact, electromagnet assembly is used for the drive to promote the subassembly and removes, and the promotion subassembly that removes drives first static contact and second static contact and switches on or break off its characterized in that: the outside of mount is provided with the epitheca and can dismantle the drain pan of being connected with the epitheca, the outer wall of epitheca is provided with inserting groove and fixture block, the outer wall of drain pan is provided with plug block and card hole, plug block corresponds to peg graft in the inserting groove in order to make card hole and fixture block match the joint, the outside of epitheca is provided with the locating piece, the outside of drain pan is provided with the constant head tank with locating piece accordant connection, the protruding setting element that is equipped with of inner wall of epitheca, setting element and contact subassembly butt.

2. The electromagnetic relay of claim 1, wherein: the setting element includes location riser block and the location crosspiece that the interval set up, location riser block all is provided with the butt cambered surface with the surface of location crosspiece, the butt cambered surface is used for contradicting the location contact subassembly.

3. The electromagnetic relay of claim 1, wherein: the outside of locating piece is provided with covers the piece, cover the piece and be used for covering the constant head tank, cover the piece and include the apron, the outside wing is formed with to the outside extension in both sides of apron, apron and outside wing integrated into one piece just wholly are U type structure.

4. The electromagnetic relay of claim 1, wherein: and mounting lugs are arranged on two sides of the bottom shell, and fastening ferrules are arranged in the mounting lugs.

5. The electromagnetic relay of claim 1, wherein: the top of the top shell is provided with a first containing hole and a second containing hole, the first static contact and the second static contact respectively penetrate through the first containing hole and the second containing hole and then protrude out of the top shell, and a separation baffle for separating the first static contact and the second static contact is arranged between the first containing hole and the second containing hole.

6. The electromagnetic relay of claim 1, wherein: the utility model discloses a solenoid assembly, including the electro-magnet subassembly, the solenoid assembly includes the skeleton and installs in the coil of skeleton, the skeleton includes integrated into one piece's first assembly plate, well hollow column and second assembly plate, the coil twines in well hollow column, first assembly plate is provided with the wiring port of being connected with external power cord, the second assembly plate is provided with the card and holds the piece, the card is held the piece and is pegged graft with the mount cooperation.

7. The electromagnetic relay of claim 1, wherein: the contact assembly is provided with a ceramic shell, the ceramic shell is provided with a first mounting hole and a second mounting hole, the first static contact and the second static contact respectively penetrate through the first mounting hole and the second mounting hole and protrude out of the ceramic shell, the outer side of the fixing frame close to the ceramic shell is respectively provided with a first magnet group and a second magnet group which are identical in structure, the first magnet group comprises a first magnet block and a second magnet block, and the first magnet block and the second magnet block are arranged at intervals and are opposite in polarity on one side close to each other.

8. The electromagnetic relay with the casing fixed on the high-strength basis as claimed in claim 6, wherein: the push assembly comprises a sealing barrel, the sealing barrel penetrates through the framework to be connected to the fixing frame, a sleeve is connected to the joint between the sealing barrel and the fixing frame, a sleeving piece is arranged in the sealing barrel, a push rod is sleeved inside the sleeving piece, an iron core is arranged on the outer sleeve of the sleeving piece, one end of the push rod stretches out of the sleeving piece suddenly and is provided with a movable contact plate, a pre-pressing spring is arranged between the movable contact plate and the sleeving piece, the other end of the push rod stretches out of the sleeving piece suddenly and is provided with an armature, the movable contact plate is arranged at an interval with the first static contact and the second static contact and is arranged relatively, the armature is arranged at an interval with the iron core and is arranged relatively, and.

9. The electromagnetic relay of claim 1, wherein: the bottom of drain pan is provided with a plurality of reference column, the bottom of mount is provided with a plurality of locating hole with reference column accordant connection.

10. The electromagnetic relay of claim 7, wherein: the first magnet block and the second magnet block are neodymium iron boron magnets.

Technical Field

The invention relates to the technical field of relays, in particular to a high-strength fixedly-connected electromagnetic relay with a shell.

Background

The relay is widely used in automatic control equipment, and is an 'automatic switch' which uses smaller current and lower voltage to control larger current and higher voltage, so that the relay plays roles of automatic regulation, safety protection, circuit conversion and the like in a circuit. At present, the relay includes that each is responsible for the subassembly assembly of different functions and forms, but the complex and complicated of assembly of each subassembly not only leads to the assembly efficiency of relay low, but also reduces the rigid coupling intensity of relay, leads to the relay often can lead to the pine to take off because of collision or vibrations, is unfavorable for relay life's extension.

Disclosure of Invention

The invention aims to provide a high-strength fixedly-connected electromagnetic relay with a shell, which is compact in structure and reasonable in design, adopts a screw-free fixing mode to firmly assemble the relay together, and improves the assembly efficiency and the fixed connection strength of the relay.

In order to achieve the above object, the invention provides a high-strength fixed connection type electromagnetic relay with a housing, which comprises a fixed frame, wherein the fixed frame is provided with an electromagnet assembly, a contact assembly and a movably arranged pushing assembly, the contact assembly comprises a first fixed contact and a second fixed contact, the electromagnet assembly is used for driving the pushing assembly to move, the moving pushing assembly drives the first fixed contact and the second fixed contact to be connected or disconnected, the fixed frame is externally provided with a top shell and a bottom shell detachably connected with the top shell, the outer wall of the top shell is provided with an insertion groove and a fixture block, the outer wall of the bottom shell is provided with an insertion block and a fixture hole, the insertion block is correspondingly inserted into the insertion groove to facilitate the fixture hole to be matched and clamped with the fixture block, the outer side of the top shell is provided with a positioning block, the outer side of the bottom shell is provided with a positioning groove matched and connected with the, the positioning piece is abutted to the contact assembly.

Preferably, the setting element includes location riser block and the location crosspiece that the interval set up, the location riser block all is provided with the butt cambered surface with the surface of location crosspiece, the butt cambered surface is used for conflicting the location contact subassembly.

Preferably, the outside of locating piece is provided with the cover spare, the cover spare is used for covering the constant head tank, the cover spare includes the apron, the outside wing that is formed with is extended outwards to the both sides of apron, apron and outside wing integrated into one piece and whole be U type structure.

Preferably, both sides of the bottom shell are provided with mounting lugs, and fastening ferrules are arranged in the mounting lugs.

Preferably, the top of the top shell is provided with a first containing hole and a second containing hole, the first static contact and the second static contact respectively pass through the first containing hole and the second containing hole and then protrude out of the top shell, and a baffle for separating the first static contact and the second static contact is arranged between the first containing hole and the second containing hole.

Preferably, electromagnet assembly includes the skeleton and installs in the coil of skeleton, the skeleton includes integrated into one piece's first assembly plate, well hollow column and second assembly plate, the coil twines in well hollow column, first assembly plate is provided with the wiring port of being connected with external power cord, the second assembly plate is provided with the card and holds the piece, the card is held the piece and is pegged graft with the mount cooperation.

Preferably, the contact assembly is provided with a ceramic shell, the ceramic shell is provided with a first mounting hole and a second mounting hole, the first static contact and the second static contact respectively penetrate through the first mounting hole and the second mounting hole and protrude out of the ceramic shell, the outer side of the fixing frame close to the ceramic shell is respectively provided with a first magnet group and a second magnet group which are identical in structure, the first magnet group comprises a first magnet block and a second magnet block, and the first magnet block and the second magnet block are arranged at intervals and have opposite polarities on the sides close to each other.

Preferably, the pushing assembly comprises a sealing barrel, the sealing barrel penetrates through the framework to be connected to the fixing frame, a sleeve is connected to a connection position between the sealing barrel and the fixing frame, a sleeving piece is arranged in the sealing barrel, a push rod is sleeved inside the sleeving piece, an iron core is sleeved outside the sleeving piece, one end of the push rod extends out of the sleeving piece suddenly to be provided with a movable contact plate, a pre-pressing spring is arranged between the movable contact plate and the sleeving piece, the other end of the push rod extends out of the sleeving piece suddenly to be provided with an armature, the movable contact plate is arranged at an interval with the first static contact and the second static contact and is arranged oppositely, the armature is arranged at an interval with the iron core and is arranged oppositely, and a reset spring is.

Preferably, the bottom of the bottom shell is provided with a plurality of positioning columns, and the bottom of the fixing frame is provided with a plurality of positioning holes in matched connection with the positioning columns.

Preferably, the first magnet block and the second magnet block are both neodymium iron boron magnets.

The invention has the beneficial effects that: a high-strength fixed-connection type electromagnetic relay with a shell comprises a fixed frame, wherein the fixed frame is provided with an electromagnet assembly, a contact assembly and a pushing assembly which is movably arranged, the contact assembly comprises a first fixed contact and a second fixed contact, the electromagnet assembly is used for driving the pushing assembly to move, the moving pushing assembly drives the first fixed contact and the second fixed contact to be connected or disconnected, the outer part of the fixed frame is provided with a top shell and a bottom shell detachably connected with the top shell, the outer wall of the top shell is provided with an inserting groove and a clamping block, the outer wall of the bottom shell is provided with an inserting block and a clamping hole, the inserting block is correspondingly inserted into the inserting groove to promote the clamping hole to be matched and clamped with the clamping block, the outer side of the top shell is provided with a positioning block, the outer side of the bottom shell is provided with a positioning groove connected with the positioning block in a matched mode, a positioning piece is arranged on the inner wall of the top shell in a protruding mode, and the positioning piece is abutted to the contact assembly.

During operation, external power cord and electromagnet assembly electric connection, electromagnet assembly drive promotion subassembly reciprocates, the promotion subassembly drive first static contact that reciprocates switches on or breaks off with the second static contact, detachable construction through between top shell and the drain pan is favorable to the convenient loading and unloading between top shell and the drain pan, when the drain pan corresponds to inserting the inserting groove through the inserted block, also make card hole and fixture block match the joint, and meanwhile, the constant head tank matches the grafting with the locating piece, through the cooperation of above each structure and connects, effectively realize all-round reliable and stable connection between drain pan and the top shell, the assembly quality is high, also be favorable to laminating conflict with the contact subassembly through the setting element, the operating position of fixed contact subassembly, high-efficient equipment is in the same place. The invention has compact structure and reasonable design, adopts a screw-free fixing mode to realize the firm assembly of the relay, and improves the assembly efficiency and the fixing strength of the relay.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural view after the top case and the bottom case are hidden in the present invention.

Fig. 3 is an exploded view of the present invention.

FIG. 4 is an exploded view of the pushing assembly of the present invention.

Fig. 5 is a schematic structural view of the support frame of the present invention.

Fig. 6 is a schematic structural view of the top case of the present invention.

Fig. 7 is a schematic structural diagram of the bottom case of the present invention.

The reference numerals include:

1-fixed frame 11-first magnet group 12-second magnet group

13-first magnet piece 14-second magnet piece 15-positioning hole

2-electromagnet assembly 21-framework 22-coil

23-first assembly plate 24-hollow column 25-second assembly plate

26-connection port 27-holding piece

3-contact component 31-first fixed contact 32-second fixed contact

33-ceramic shell 34-first mounting hole 35-second mounting hole

4-pushing assembly 41-sealing cylinder 42-sleeve

43-sleeve joint 44-push rod 45-iron core

46-moving contact plate 47-prepressing spring 48-armature

49-return spring 410-support bracket 411-base plate

412-main clip foot 413-sub clip foot 414-plug hole

415-circular reinforced hole

5-top shell 51-inserting groove 52-fixture block

53-positioning block 54-positioning vertical block 55-positioning transverse block

56-abutting cambered surface 57-cover plate 58-outer side wing

59-first containing hole 510-second containing hole 511-baffle

6-bottom shell 61-plug block 62-clamping hole

63-positioning groove 64-mounting ear 65-fastening ferrule

66-positioning post.

Detailed Description

The present invention is described in detail below with reference to the attached drawings.

As shown in fig. 1 to 7, the housing high-strength fixed electromagnetic relay of the present invention includes a fixed frame 1, the fixed frame 1 is provided with an electromagnet assembly 2, a contact assembly 3 and a movably arranged pushing assembly 4, the contact assembly 3 includes a first fixed contact 31 and a second fixed contact 32, the electromagnet assembly 2 is used for driving the pushing assembly 4 to move, the moved pushing assembly 4 drives the first fixed contact 31 and the second fixed contact 32 to be connected or disconnected, the fixed frame 1 is provided with a top housing 5 and a bottom housing 6 detachably connected to the top housing 5, the outer wall of the top housing 5 is provided with an insertion groove 51 and a fixture block 52, the outer wall of the bottom housing 6 is provided with an insertion block 61 and a fixture hole 62, the insertion block 61 is correspondingly inserted into the insertion groove 51 to facilitate the fixture hole 62 to be matched and clamped with the fixture block 52, the outer side of the top housing 5 is provided with a positioning block 53, the outer side of the bottom shell 6 is provided with a positioning groove 63 which is connected with the positioning block 53 in a matching manner, the inner wall of the top shell 5 is convexly provided with a positioning element, and the positioning element is abutted to the contact assembly 3.

During operation, external power cord and electromagnet assembly 2 electric connection, electromagnet assembly 2 drive promotion subassembly 4 reciprocates, promotion subassembly 4 that reciprocates drives first static contact 31 and second static contact 32 switch on or break off, detachable construction through between top shell 5 and the drain pan 6 is favorable to the convenient loading and unloading between top shell 5 and the drain pan 6, when the drain pan 6 corresponds to inserting groove 51 through plug 61, also make card hole 62 and fixture block 52 match the joint, meanwhile, constant head tank 63 matches the grafting with locating piece 53, through the cooperation of above each structure connection, effectively realize all-round reliable and stable connection between drain pan 6 and the top shell 5, the assembly quality is high, also be favorable to laminating conflict with contact assembly 3 through the setting element, the operating position of fixed contact assembly 3, high-efficient equipment is in the same place. The invention has compact structure and reasonable design, adopts a screw-free fixing mode to realize the firm assembly of the relay, and improves the assembly efficiency and the fixing strength of the relay.

As shown in fig. 3 and 6, the positioning element of the present embodiment includes a positioning vertical block 54 and a positioning horizontal block 55 that are arranged at intervals, the outer surfaces of the positioning vertical block 54 and the positioning horizontal block 55 are both provided with an abutting arc surface 56, and the abutting arc surface 56 is used for abutting against the positioning contact assembly 3. Specifically, protruding location riser block 54 of locating the inner wall of top shell 5 and location horizontal piece 55 all contradict location contact subassembly 3 through butt cambered surface 56, and laminating area of contact is big, and all-round location is effectual, and the packaging efficiency is high.

As shown in fig. 1, 3 and 6, a covering member is disposed on an outer side of the positioning block 53 of the present embodiment, the covering member is used for covering the positioning slot 63, the covering member includes a cover plate 57, outer side wings 58 are formed by extending two sides of the cover plate 57 outwards, and the cover plate 57 and the outer side wings 58 are integrally formed and are integrally formed into a U-shaped structure. Specifically, apron 57 and outside wing 58 integrated into one piece and whole be U type structure and be used for covering totally and close constant head tank 63, effectively avoid external dust foreign matter to enter into the inside of relay through the gap of constant head tank 63, ensure the normal function of internal element, occupation space is little, structural design is ingenious and cover effectually.

As shown in fig. 1, 3 and 7, the bottom case 6 of the present embodiment is provided with mounting ears 64 on both sides thereof, and fastening collars 65 are provided in the mounting ears 64. Specifically, the relay is integrally installed and fixed through the installation lug 64, the installation connection strength of the relay can be further improved through the fastening ferrule 65, and the shock resistance is good.

As shown in fig. 1, 3 and 6, a first accommodating hole 59 and a second accommodating hole 510 are formed in the top of the top case 5 in this embodiment, the first stationary contact 31 and the second stationary contact 32 respectively pass through the first accommodating hole 59 and the second accommodating hole 510 and then protrude out of the top case 5, and a baffle 511 for separating and separating the first stationary contact 31 and the second stationary contact 32 is disposed between the first accommodating hole 59 and the second accommodating hole 510. Specifically, the first fixed contact 31 and the second fixed contact 32 respectively pass through the first containing hole 59 and the second containing hole 510 and then protrude out of the top case 5, so that the structure design is reasonable, the space utilization rate is high, the installation is convenient, the positioning is reliable, the first fixed contact 31 and the second fixed contact 32 are prevented from being loosened and falling off due to the influence of external vibration, the baffle 511 is used for separating the first fixed contact 31 and the second fixed contact 32, the first fixed contact 31 and the second fixed contact 32 are ensured to work independently, electromagnetic interference is shielded, and normal and stable work is ensured.

As shown in fig. 2 and 3, the electromagnet assembly 2 of this embodiment includes a frame 21 and a coil 22 installed on the frame 21, the frame 21 includes a first assembly plate 23, a hollow column 24 and a second assembly plate 25 which are integrally formed, the coil 22 is wound on the hollow column 24, the first assembly plate 23 is provided with a wiring port 26 connected with an external power line, the second assembly plate 25 is provided with a clamping piece 27, and the clamping piece 27 is inserted into the fixing frame 1 in a matching manner. Specifically, the framework 21 is provided with the coil 22, the coil 22 is wound on the hollow column 24, an external power line is communicated with the coil 22 through the wiring port 26, and the framework 21 is firmly inserted into the fixed frame 1 through the clamping piece 27, so that the working stability of the electromagnet assembly 2 is ensured.

As shown in fig. 2 and 3, the contact assembly 3 of the present embodiment is provided with a ceramic shell 33, the ceramic shell 33 is provided with a first mounting hole 34 and a second mounting hole 35, the first stationary contact 31 and the second stationary contact 32 respectively pass through the first mounting hole 34 and the second mounting hole 35 and protrude out of the ceramic shell 33, the fixed frame 1 is provided with a first magnet group 11 and a second magnet group 12 which have the same structure and are respectively arranged on the outer sides close to the ceramic shell 33, the first magnet group 11 includes a first magnet block 13 and a second magnet block 14, and the first magnet block 13 and the second magnet block 14 are arranged at intervals and have opposite polarities on the sides close to each other. Specifically, the first fixed contact 31 and the second fixed contact 32 respectively pass through the first mounting hole 34 and the second mounting hole 35 and protrude out of the ceramic shell 33, so that the first fixed contact 31 and the second fixed contact 32 are stably mounted in the ceramic shell 33, an electric arc is generated in the process of conducting or disconnecting between the movable contact plate 46 and the first fixed contact 31 and the second fixed contact 32, the first magnet block 13 and the second magnet block 14 with opposite polarities attract each other, the first magnet block 13 attracts the electric arc and causes the electric arc to be elongated and extinguished towards the second magnet block 14, and the first magnet group 11 and the second magnet group 12 with the same structure can further accelerate the speed of extinguishing the electric arc, thereby effectively preventing the electric arc from damaging other elements of the relay, and prolonging the service life of the relay.

As shown in fig. 3 and 4, the pushing assembly 4 of this embodiment includes a sealing cylinder 41, the sealing cylinder 41 passes through the framework 21 and is connected to the fixed frame 1, a sleeve 42 is connected to a connection portion between the sealing cylinder 41 and the fixed frame 1, a sleeve 43 is disposed in the sealing cylinder 41, a push rod 44 is sleeved inside the sleeve 43, an iron core 45 is sleeved outside the sleeve 43, a movable contact plate 46 is disposed at one end of the push rod 44 protruding out of the sleeve 43, a pre-pressing spring 47 is disposed between the movable contact plate 46 and the sleeve 43, an armature 48 is disposed at the other end of the push rod 44 protruding out of the sleeve 43, the movable contact plate 46 is spaced from and disposed opposite to the first stationary contact 31 and the second stationary contact 32, the armature 48 is spaced from and disposed opposite to the iron core 45, and a return spring 49 is disposed between the armature 48 and the iron core 45. Specifically, the sealing cylinder 41 passes through the electromagnet assembly 2 and is connected to the fixed frame 1, a sleeve 42 is connected to a connection position between the sealing cylinder 41 and the fixed frame 1, so as to effectively improve connection stability, the sleeve 43 is sleeved inside the iron core 45, the push rod 44 is movably installed inside the sleeve 43, one end of the push rod 44 protrudes out of the sleeve 43 and is provided with a movable contact plate 46, the other end of the push rod 44 protrudes out of the sleeve 43 and is provided with an armature 48, when an external power line is connected with the electromagnet assembly 2, the electromagnet assembly 2 generates a magnetic field after being powered on, the magnetic field acts on the sealing cylinder 41, so that a magnetic circuit closed loop is formed inside the sealing cylinder 41, the iron core 45 stably attracts the armature 48 to move upwards, the armature 48 drives the movable contact plate 46 to move upwards through the push rod 44 until the movable contact plate 46 is in contact conduction with the first static contact 31 and the second static contact 32, so, when an external power line disconnects the electromagnet assembly 2, the electromagnet assembly 2 no longer generates a magnetic field, the armature 48 moves downward under the action of its own gravity to separate from the iron core 45, the return spring 49 is used for urging the armature 48 to return to the initial position, and the movable contact plate 46 is stably held on the push rod 44 by the elastic restoring force of the pre-pressing spring 47, so that the movable contact plate 46 and the push rod 44 are prevented from loosening and separating due to collision or vibration of the relay.

As shown in fig. 3 and 7, the bottom of the bottom shell 6 of the present embodiment is provided with a plurality of positioning posts 66, and the bottom of the fixing frame 1 is provided with a plurality of positioning holes 15 matching and connecting with the positioning posts 66. Specifically, the bottom shell 6 is connected with the positioning holes 15 through the positioning columns 66 in a matched manner, so that the fixing frame 1 is firmly installed in the bottom shell 6, the structure is simple, and the positioning effect is good.

As shown in fig. 2 and 3, the first magnet block 13 and the second magnet block 14 of the present embodiment are both ndfeb magnets. Specifically, the first magnet block 13 and the second magnet block 14 are both strong magnets, and sufficient magnetic attraction force is ensured between the first magnet block 13 and the second magnet block 14, so that the operation performance is stable.

As shown in fig. 4 and 5, a supporting frame 410 is disposed at the bottom of the movable contact plate 46 of this embodiment, the supporting frame 410 includes a base plate 411, two ends of the base plate 411 extend outward to form main clamping pins 412, an outer side of the base plate 411 extends outward to form sub-clamping pins 413, a plug hole 414 for inserting the push rod 44 is disposed in the middle of the base plate 411, and circular reinforcing holes 415 are disposed on two sides of the base plate 411 close to the plug hole 414. Specifically, base plate 411 passes through the firm joint in main card foot 412 and the outer fringe of movable contact spring 46, divides card foot 413 can further increase and bear the weight of the area of support, still promotes joint strength, and plug jack 414 is used for supplying push rod 44 to pass and inserts and then with movable contact spring 46 stable connection, and circular enhancement hole 415 not only effectively alleviates base plate 411's dead weight, and manufacturing and processing is convenient, but also improves base plate 411's overall structure stability.

The above description is only a preferred embodiment of the present invention, and for those skilled in the art, the present invention should not be limited by the description of the present invention, which should be interpreted as a limitation.