CN117276014A - Control and protection switch electric appliance - Google Patents

Abstract

The invention relates to a control and protection switch electrical appliance, which comprises an operating mechanism, an electromagnetic system and a base, wherein a moving contact and a fixed contact which are opposite are arranged in the base, the operating mechanism and the electromagnetic system are arranged on the base, the operating mechanism and the electromagnetic system are both in linkage connection with the moving contact, the operating mechanism can prop against the moving iron core to block the moving iron core to move inwards to control the electromagnetic system when a stop cam arranged on the inner side of the moving iron core rotates to an inward angle, and the interlocking between two modules is realized.

Description

Control and protection switch electric appliance

Technical Field

The invention relates to a control and protection switch electric appliance.

Background

The control and protection switch electric appliance is the best substitute product of low-voltage electric appliances such as a breaker, a contactor, a thermal relay, a fuse and the like. Along with the development of digitalization and the Internet of things, various information is queried in real time, even various devices are controlled, intelligent power distribution is rapidly developed, and intelligent cloud power distribution is based on control and protection switch products.

The existing control and protection switch electrical appliance has complex structure, various components are not assembled in a modularized way, the assembly is complex, the volume is large, the production cost is high, the automatic assembly is inconvenient, and the production efficiency is low.

Disclosure of Invention

In view of the above, the present invention is directed to a control and protection switch device that adopts a modular design and can be assembled between modules conveniently.

In order to achieve the above purpose, the invention adopts a control and protection switch electrical appliance, which comprises an operating mechanism, an electromagnetic system and a base, wherein the base is internally provided with a moving contact and a fixed contact which are opposite, the operating mechanism and the electromagnetic system are arranged on the base, the operating mechanism and the electromagnetic system are both connected with the moving contact in a linkage way, the electromagnetic system comprises a shell, an electromagnetic coil, a fixed iron core, a moving iron core and a contact connecting rod which are arranged in the shell, the moving iron core and the fixed iron core respectively penetrate through the inner end and the outer end of the electromagnetic coil, the contact connecting rod is hinged on the inner side of the shell, the contact connecting rod is in linkage connection with the moving iron core, the moving iron core is in linkage connection with the moving contact through the contact connecting rod, the operating mechanism comprises a knob, a manual shaft and a stop cam, the knob is coaxially connected on the upper end of the manual shaft, the stop cam is coaxially connected on the lower end of the manual shaft, the stop cam is arranged on the inner side of the moving iron core, and the shell forms a stop opening between the stop cam and the moving iron core, and the moving iron core can be propped against the moving iron core to stop inward movement when the stop cam rotates to an inward angle.

The technical scheme has the beneficial effects that the operating mechanism controls the movable iron core of the electromagnetic system through the stop cam to realize manual control of starting or stopping of the electromagnetic system, the linkage connection between the stop cam and the movable iron core is in touch blocking type, a connecting device is not required to be arranged for linkage connection, and the position of the operating mechanism and the position of the electromagnetic system are only required to be fixed during assembly, so that the electromagnetic system is convenient to assemble and stable and reliable to connect.

The invention is further arranged that a contact push rod is arranged above the movable contact of the base, the outer end of the contact connecting rod is arranged above the contact push rod, the contact push rod is pushed to move downwards when the contact connecting rod is pressed down, the operating mechanism further comprises a support, a contact crank arm, an interlocking shaft, a linkage rod and an electromagnetic tripping device, the contact crank arm is hinged in the support, a main spring for pulling the contact crank arm to rotate unidirectionally is connected between the contact crank arm and the support, a locking part and a contact driving part are formed on the contact crank arm, the top end of the contact driving part is arranged above the contact push rod and can push the contact push rod to move downwards, the interlocking shaft and the linkage rod are coaxially hinged in the support, the interlocking shaft is provided with an interlocking spring for pulling the interlocking shaft to rotate in the opposite direction, a blocking part, a linkage part and a tripping part of the interlocking shaft can form blocking fit with the locking part of the contact crank arm, the blocking contact crank arm rotates unidirectionally, the interlocking part of the interlocking shaft is connected with the linkage rod, and the electromagnetic tripping device is arranged on one side of the support and is connected with the tripping part of the interlocking shaft.

The technical scheme has the beneficial effects that the operating mechanism and the electromagnetic system control the action of the moving contact by touching the push rod of the extrusion contact, each module is convenient to assemble, the operating mechanism can drive the moving contact of the base to act through the electromagnetic release, and the functions are comprehensive.

The invention further provides an overcurrent release arranged on the base, the overcurrent release comprises a magnetic yoke, an armature and a rocker, the rocker is hinged above the magnetic yoke, the armature is arranged in the rocker, a rocker spring for pulling one end of the rocker upwards is arranged on the rocker, a drag hook is formed on the upper side face of the rocker, the upper end of the drag hook is arranged on one side of the lower end of a linkage rod, the rocker realizes linkage with the linkage rod through the drag hook, a linkage table is formed on one side of the upper end of the linkage rod, and a linkage part of the linkage shaft is pressed on the linkage table.

The technical scheme has the beneficial effects that the operating mechanism is connected with the overcurrent release in a linkage way, so that the overcurrent protection function is realized, the overcurrent release is connected with the lower end of the linkage rod of the operating mechanism in a touch type way, and the assembly is convenient.

The electromagnetic system further comprises a micro switch, the micro switch is arranged on the upper side of the shell, the operating mechanism further comprises a shaft sleeve and a driving bent rod, the shaft sleeve is fixedly sleeved on the manual shaft, a section of driving groove is formed in the shaft sleeve, the driving bent rod is hinged to a support on one side of the shaft sleeve, the tail end of the driving bent rod is in linkage connection with the contact crank arm, the front end of the driving bent rod is correspondingly arranged at the triggering position of the micro switch, a linkage frame is arranged on the driving bent rod, one end of the linkage frame is in yielding fit with the driving groove of the shaft sleeve, a bent rod spring is arranged between the linkage frame and the driving bent rod, and a linkage spring is arranged between the linkage frame and the support.

The technical scheme has the beneficial effects that the operating mechanism is connected with the micro switch of the electromagnetic system, so that the switch position can be indicated.

The invention is further arranged that the moving contact is connected with a moving contact supporting piece, the moving contact supporting piece extends out of the base upwards, a moving contact spring for pushing the moving contact upwards is arranged below the moving contact, the contact push rod is arranged above the moving contact supporting piece, and the contact push rod can drive the moving contact to move downwards by pushing the moving contact supporting piece to move downwards.

The invention further provides that the base is provided with the guide rod upwards, and the contact push rod is sleeved on the guide rod and moves up and down along the guide rod.

The invention further provides that the contact push rod forms a third step from outside to inside, the lowest step is arranged at the outermost side of the contact push rod and is in linkage connection with the contact connecting rod in a touching way, the highest step is arranged at the middle part of the contact push rod and is in linkage connection with the contact driving part of the contact crank arm in a touching way, a guide hole is formed in the middle step, and the guide rod on the base penetrates through the guide hole.

The electromagnetic release further comprises a release frame, an electromagnetic coil, a release crank arm and a pushing frame, wherein the release frame is connected to the outer side of the support, the electromagnetic coil is arranged in the release frame, the release crank arm is hinged to the release frame in front of the electromagnetic coil, an iron core part and a blocking block are respectively formed on the release crank arm, the iron core part is arranged at the front end of the center of the electromagnetic coil, the pushing frame is arranged in the release frame and moves back and forth towards the release part of the interlocking shaft, a release spring is arranged between the pushing frame and the release frame, a blocking hook is formed on the pushing frame, and a torsion spring is arranged on the release crank arm to push the blocking block into the blocking hook of the pushing frame so as to limit the pushing frame.

The electromagnetic system comprises an auxiliary connecting rod, the auxiliary connecting rod is hinged to the bottom of the outer side of the shell, a linkage rod is arranged on the auxiliary connecting rod and connected with the auxiliary connecting rod and the contact connecting rod, and the top end of the auxiliary connecting rod extends into the auxiliary module to control the opening and closing of the auxiliary module.

The invention further provides that the control and protection switch electric appliance further comprises a shell, the shell is connected to the base, the operating mechanism, the electromagnetic system and the auxiliary module are arranged in the shell, the wiring terminal of the auxiliary module extends out of the shell, wiring terminals are arranged at two ends of the base, and the wiring terminals are arranged outside the shell.

The invention has the beneficial effects that the modularized design is adopted, the linkage connection among the operating mechanism, the electromagnetic system, the auxiliary module and the base is in a touch type connection mode, the fixed connection is carried out in different modes, the assembly is convenient, the production efficiency is high, and the automatic production is convenient.

Drawings

Fig. 1 is a schematic perspective view of an embodiment of the present invention.

Fig. 2 is a side view of an embodiment of the invention with the housing removed.

Fig. 3 is a cross-sectional view of an embodiment of the invention with the housing removed.

Fig. 4 is a top view of an embodiment of the invention with the housing removed.

Fig. 5 is a schematic view of a base of an embodiment of the present invention.

Fig. 6 is a schematic diagram of an electromagnetic system in accordance with an embodiment of the present invention.

Fig. 7 is a schematic illustration of an electromagnetic system with a housing removed in accordance with an embodiment of the present invention.

Fig. 8 is an exploded view of an electromagnetic system in accordance with an embodiment of the present invention.

FIG. 9 is a schematic illustration of an operating mechanism according to an embodiment of the present invention.

Fig. 10 is a perspective view of an actuator with a bracket removed in accordance with an embodiment of the present invention.

FIG. 11 is a top view of an actuator with a bracket removed according to an embodiment of the invention.

FIG. 12 is a schematic illustration of an actuator mechanism with a bracket and a manual mechanism removed in accordance with an embodiment of the present invention.

Fig. 13 is a partial schematic view of an operating mechanism according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1 to 13, a specific embodiment of the present invention is a control and protection switch, which includes an operating mechanism 1, an electromagnetic system 2, an auxiliary module 3, a base 4 and a housing 5, wherein the operating mechanism 1, the electromagnetic system 2 and the auxiliary module 3 are all disposed on the base 4, the housing 5 is connected to the base 4, the operating mechanism 1, the electromagnetic system 2 and the auxiliary module 3 are disposed in the housing 5, a terminal 31 of the auxiliary module 3 extends out of the housing 5, two ends of the base 4 are provided with connection terminals 41, and the connection terminals 41 are disposed outside the housing 5. The base 4 is internally provided with a moving contact 42 and a fixed contact 43 which are opposite, the fixed contact 43 is arranged above two sides of the moving contact 42, the moving contact 42 is connected with a moving contact supporting piece 44, the moving contact supporting piece 44 extends upwards out of the base 4, a moving contact spring 45 for pushing the moving contact 42 upwards is arranged below the moving contact 42, a contact push rod 6 is arranged above the moving contact supporting piece 44, the contact push rod 6 can push the moving contact supporting piece 44 to move downwards so as to drive the moving contact 42 to move downwards to realize the breaking of the moving contact and the fixed contact, the base 4 is upwards provided with a guide rod 46, the contact push rod 6 is sleeved on the guide rod 46 and moves up and down along the guide rod 46, the contact push rod 6 forms a third step from outside to inside, the lowest step is arranged at the outermost side of the contact push rod 6, the highest step is arranged at the middle of the contact push rod 6, a guide hole 61 is formed on the middle step, and the guide rod 46 on the base 4 is penetrated in the guide hole 61.

The electromagnetic system 2 comprises an electromagnetic coil 21, a static iron core 22, a movable iron core 23, a back seat 24 and a front cover 25, wherein the static iron core 22 and the movable iron core 23 respectively penetrate through two ends of the electromagnetic coil 21, the back seat 24 and the front cover 25 are spliced to form a shell, the back seat 24 is connected with the back end of the static iron core 22, the back end of the back seat 24 forms a static iron core groove 241, the back side of the static iron core 22 is arranged in the static iron core groove 241, a convex fixing part 221 is formed on the static iron core 22, a fixing hole 242 corresponding to the fixing part 221 is formed on the side wall of the static iron core groove 241 of the back seat 24, an elastic buckle 243 is arranged at the back end of the fixing hole 242, the fixing part 221 of the static iron core 22 is clamped in the fixing hole 242 through the elastic buckle 243 to realize the fixed connection of the back seat 24 and the static iron core 22, two sides of the back seat 24 form a plurality of heat dissipation ports 244, the front cover 25 is connected with the front end of the back seat 24, the front cover 25 is connected with the back seat 24 through the buckle 251, the upper end of the front cover 25 forms a switch buckle 252, a micro switch 26 is arranged in the switch buckle 252, the lower end of the front cover 25 is hinged with a contact connecting rod 27, a push plate 231 is arranged on the movable iron core 23 in a penetrating way, the contact connecting rod 27 forms a push plate linkage part 271 facing the push plate 231 in the front cover 25, the push plate linkage part 271 is arranged at the inner side of the push plate 231, the contact connecting rod 27 is connected with a contact spring 272 in the front cover 25, the front end of the contact spring 272 is connected with the lower end of the contact connecting rod 27, the rear end of the contact spring 272 is connected with a rear seat 24, the push plate linkage part 271 of the contact connecting rod 27 moves towards the push plate 231 under the elastic force of the contact spring 272, the movable iron core 23 is pushed to the outer side, the top end of the contact connecting rod 27 is pressed on the lowest step of the contact push rod 6 to form linkage connection with the contact push rod 6, the top end of the push plate linkage part 271 of the contact connecting rod 27 forms an indication groove 273, the front cover 25 is hinged with an indication rod 28, the lower extreme of instruction pole 28 is pegged graft in instruction groove 273, and the rear side lower extreme of back lid 24 articulates has auxiliary link 29, is provided with the gangbar 291 on the auxiliary link 29, and the gangbar 291 is connected between auxiliary link 29 and contact connecting rod 27, realizes the gangbar connection of auxiliary link 29 and contact connecting rod 27, and auxiliary link 29's top stretches into auxiliary module 3, controls auxiliary module 3's switching.

The operating mechanism 1 comprises a support 11, a contact crank arm 12, an interlocking shaft 13, an interlocking rod 14, an electromagnetic release 15 and a manual mechanism 16, wherein the contact crank arm 12 is hinged in the support 11, a main spring 17 for pulling the contact crank arm 12 to rotate unidirectionally is connected between the contact crank arm 12 and the support 11, the outer end of the main spring 17 is connected to a shaft erected in the support 11, a locking part 121 and a contact driving part 122 are formed on the contact crank arm 12, the top end of the contact driving part 122 of the contact crank arm 12 is pressed on the highest step of the contact push rod 6 to form linkage connection with the contact push rod 6, the contact push rod 6 can be pushed to move downwards when the contact crank arm 12 rotates, the interlocking shaft 13 and the interlocking rod 14 are coaxially hinged in the support 11, an interlocking spring 131 for pulling the interlocking shaft 13 to rotate in the opposite direction of the contact crank arm 12 is arranged on the interlocking shaft 13, a blocking part 132, a tripping part 133 and a tripping part 134 are formed on the interlocking shaft 13, the blocking part 132 on the interlocking shaft 13 is a protrusion of a semi-cylindrical body, the circumferential surface of the semi-cylindrical body is contacted with the locking part 121 of the contact crank arm 12 to realize linkage connection with the contact crank arm 12, the interlocking part 121 of the interlocking part 12 is contracted in the direction of the interlocking shaft 13, and the interlocking shaft 13 is contracted in the interlocking direction of the interlocking shaft 13, and the interlocking shaft 13 is arranged on one side, and the interlocking shaft 13 is contracted in the interlocking direction, and the interlocking part is 13.

The manual mechanism 16 comprises a manual shaft 161, a stop cam 162, a shaft sleeve 163 and a knob 160, wherein the knob 160 is sleeved at the upper end of the manual shaft 161, the stop cam 162 is fixedly connected at the lower end of the manual shaft 161, the stop cam 162 is arranged at the inner side of the movable iron core 23, a stop opening 253 is formed between the stop cam 162 and the movable iron core 23 by the front cover 25, the movable iron core 23 is blocked from moving inwards by the stop cam 162 when the stop cam 162 rotates to an inward angle, the shaft sleeve 163 is fixedly sleeved on the manual shaft 161, a torsion spring 164 is arranged between the shaft sleeve 163 and the bracket 11, a section of driving groove 1631 is formed on the shaft sleeve 163, a driving bent rod 165 is hinged on the bracket 11 at one side of the shaft sleeve 163, an upper driving part 123 is formed on the contact bent arm 12, the upper driving part 123 is in linkage connection with the tail end of the driving bent rod 165 and correspondingly pushes the driving bent rod 165 to act, a linkage frame 166 is arranged on the driving bent rod 165, a bent rod spring 167 is arranged between the linkage frame 166 and the driving bent rod 165 when one end of the stop frame 166 and the driving groove 1631 of the shaft sleeve 163 form a yielding fit, a bent rod spring 168 is arranged between the linkage frame 166 and the driving bent rod 165, a bent rod 168 is arranged between the frame 168 and the bracket 11, a linkage bent rod 168 is arranged, and the linkage bent rod 168 is arranged at the end and the bracket 11, and the driving bent rod 165 when the driving bent rod 165 is in a micro-motion position.

The electromagnetic release 15 includes a release frame 151, a release coil 152, a release lever 153, and a push frame 154, the release frame 151 is connected to the outside of the support 11, the release coil 152 is disposed in the release frame 151, the release lever 153 is hinged to the release frame 151 in front of the release coil 152, an iron core portion 1531 and a blocking block 1532 are formed on the release lever 153, the iron core portion 1531 is disposed at the front end of the center of the release coil 152 and opposite to the movable iron core, the push frame 154 is disposed in the release frame 151 and moves back and forth toward the release portion 134 of the interlocking shaft 13, a release spring 155 is disposed between the push frame 154 and the release frame 151, a blocking hook 1541 is formed on the push frame 154, a release torsion spring is disposed on the release lever 153 to push the blocking block 1532 into the blocking hook 1541 of the push frame 154 to limit the push frame 154, and when the movable iron core portion 1531 of the release lever 153 is moved forward by the movable iron core portion 153152, the blocking block 1532 of the release lever 153 is moved out from the blocking hook 1541 and contacts the limit of the push frame 154 to push the push frame 154 to move forward, so that the push frame 154 moves forward toward the blocking hook 134 to push the blocking portion 134.

Be provided with overcurrent release 47 on the base 4, overcurrent release 47 includes yoke 471, armature 472 and wane 473, and wane 473 articulates in yoke 471 top, and armature 472 sets up in wane 473, is provided with the wane spring 474 with wane 473 one end upwards pull-up on the wane 473, and the side forms drag hook 475 on the wane 473, and the upper end setting of drag hook 475 is in one side of gangbar 14 lower extreme, and wane 473 realizes the linkage with gangbar 14 through drag hook 475.

The present invention is not limited to the specific embodiments described and illustrated herein, and other modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention. All such modifications and variations are intended to be within the scope of the present invention. Moreover, all the components described herein may be replaced by other technically equivalent elements.

Claims (10)

1. The utility model provides a control and protection switch electrical apparatus, includes operating device, electromagnetic system and base, is provided with relative moving contact and static contact in the base, operating device and electromagnetic system set up on the base, operating device and electromagnetic system all are connected its characterized in that with the moving contact linkage: the electromagnetic system comprises a shell, an electromagnetic coil, a static iron core, a movable iron core and a contact connecting rod, wherein the electromagnetic coil, the static iron core, the movable iron core and the static iron core are arranged in the shell, the movable iron core and the static iron core penetrate through the inner end and the outer end of the electromagnetic coil respectively, the contact connecting rod is hinged to the inner side of the shell, the contact connecting rod is in linkage connection with the movable iron core, the movable iron core is in linkage connection with the movable contact through the contact connecting rod, the operating mechanism comprises a knob, a manual shaft and a stop cam, the knob is coaxially connected to the upper end of the manual shaft, the stop cam is coaxially connected to the lower end of the manual shaft, the stop cam is arranged on the inner side of the movable iron core, a stop opening is formed between the stop cam and the movable iron core, and the stop cam can prop against the movable iron core to stop the inward movement when rotating to an inward angle.

2. The control and protection switching device according to claim 1, wherein: the movable contact of base top is provided with the contact push rod, the outer end setting of contact connecting rod is in contact push rod top, the contact push rod moves down when pushing down, operating device still includes the support, contact turning arm, the interlocking axle, the gangbar, electromagnetic release, the contact turning arm articulates in the support, be connected with the main spring that pulls the unidirectional rotation of contact turning arm between contact turning arm and the support, form locking part and contact drive portion on the contact turning arm, the top of contact drive portion sets up in contact push rod top, can promote contact push rod and move down, interlocking axle and gangbar coaxial articulated in the support, be provided with the interlocking spring that pulls the opposite direction rotation of interlocking axial contact turning arm on the interlocking axle, form blocking part on the interlocking axle, linkage part, trip portion, the blocking part of interlocking axle can constitute with the locking part of contact turning arm and block the unidirectional rotation of contact turning arm, the linkage part and the gangbar linkage connection, electromagnetic release sets up the trip and is connected with the trip part of interlocking axle in support one side.

3. The control and protection switching device according to claim 2, wherein: the base is provided with the overcurrent release, the overcurrent release includes yoke, armature and wane, and the wane articulates in the yoke top, and armature setting is in the wane, is provided with the wane spring that upwards draws wane one end on the wane, and the side forms the drag hook on the wane, and the upper end of drag hook sets up in one side of gangbar lower extreme, and the wane passes through the drag hook to be realized with the linkage of gangbar, and gangbar upper end one side forms the linkage platform, and the linkage portion of interlocking axle is pressed on the linkage platform.

4. A control and protection switching device according to claim 2 or 3, characterized in that: the electromagnetic system further comprises a micro switch, the micro switch is arranged on the upper side of the shell, the operating mechanism further comprises a shaft sleeve and a driving bent rod, the shaft sleeve is fixedly sleeved on the manual shaft, a section of driving groove is formed in the shaft sleeve, the driving bent rod is hinged to a support on one side of the shaft sleeve, the tail end of the driving bent rod is connected with a contact crank in a linkage mode, the front end of the driving bent rod is correspondingly arranged at the triggering position of the micro switch, a linkage frame is arranged on the driving bent rod, one end of the linkage frame is in abdicating fit with the driving groove of the shaft sleeve, a bent rod spring is arranged between the linkage frame and the driving bent rod, and a linkage spring is arranged between the linkage frame and the support.

5. A control and protection switching device according to claim 2 or 3, characterized in that: the movable contact is connected with a movable contact supporting piece, the movable contact supporting piece extends out of the base upwards, a movable contact spring for pushing the movable contact upwards is arranged below the movable contact, a contact push rod is arranged above the movable contact supporting piece, and the movable contact can be driven to move downwards by pushing the movable contact supporting piece.

6. The control and protection switching device according to claim 5, wherein: the base is upward provided with a guide rod, and the contact push rod is sleeved on the guide rod and moves up and down along the guide rod.

7. The control and protection switching device according to claim 6, wherein: the contact push rod is formed into a third-step ladder from outside to inside, the lowest step is arranged at the outermost side of the contact push rod and is in linkage connection with the contact connecting rod in a touching manner, the highest step is arranged at the middle of the contact push rod and is in linkage connection with the contact driving part of the contact crank arm in a touching manner, a guide hole is formed in the middle step, and the guide rod on the base penetrates through the guide hole.

8. The control and protection switching device according to claim 2, wherein: the electromagnetic release comprises a release frame, an electromagnetic coil, release crank arms and a pushing frame, wherein the release frame is connected to the outer side of the support, the electromagnetic coil is arranged in the release frame, the release crank arms are hinged to the release frame in front of the electromagnetic coil, an iron core part and a blocking block are respectively formed on the release crank arms, the iron core part is arranged at the front end of the center of the electromagnetic coil, the pushing frame is arranged in the release frame and moves back and forth towards the release part of the interlocking shaft, a release spring is arranged between the pushing frame and the release frame, a blocking hook is formed on the pushing frame, and a torsion spring is arranged on the release crank arms to push the blocking block into the blocking hook of the pushing frame to limit the pushing frame.

9. The control and protection switching device according to claim 1 or 2, characterized in that: the control and protection switch electrical appliance further comprises an auxiliary module, the electromagnetic system comprises an auxiliary connecting rod, the auxiliary connecting rod is hinged to the outer bottom of the shell, a linkage rod is arranged on the auxiliary connecting rod and connected with the auxiliary connecting rod and the contact connecting rod, the top end of the auxiliary connecting rod stretches into the auxiliary module, and the auxiliary module is controlled to be opened and closed.

10. The control and protection switching device according to claim 9, wherein: the control and protection switch electrical appliance further comprises a shell, the shell is connected to the base, the operating mechanism, the electromagnetic system and the auxiliary module are arranged in the shell, the wiring end of the auxiliary module extends out of the shell, wiring terminals are arranged at two ends of the base, and the wiring terminals are arranged outside the shell.