CN114823238B - An electromagnetic switch with overload protection - Google Patents

Abstract

The present invention provides an electromagnetic switch with overload protection, which includes a protective shell, an electromagnetic adsorption device, a protective device, and a capacitor. The electromagnetic adsorption device, the protective device, and the capacitor are all fixedly accommodated in the protective shell. At the power output end, the protection device includes a first fixing shell, a connecting component, and a conductive member. When the circuit is powered normally, the electromagnetic adsorption device adsorbs the connecting component so that the connecting component contacts the conductive member and forms an electrical connection. When the circuit is overloaded and powered, the electromagnetic The increased magnetic force of the adsorption device adsorbs a part of the connection component into the electromagnetic adsorption device, so that the connection component is disconnected from the contact with the conductive member and electrically connected; the present invention maintains the circuit in the circuit and prevents the external power supply from being used when low voltage occurs intermittently. The adverse effects caused by electrical appliances; capacitors are used to provide power supplements for electrical appliances when the external power supply is intermittently low-voltage, which is beneficial to protect the safe use of electrical appliances.

Description

An electromagnetic switch with overload protection

technical field

The invention relates to the technical field of electric switches, in particular to an electromagnetic electric switch with overload protection.

Background technique

When the equipment and the power supply line fail during operation or the load of the equipment is too large and do not match, the current (or voltage) will exceed the allowable range and limit of the equipment and the power supply line, and overload will occur at this time. At present, the electrical control system is generally used For overload protection, the thermal element of the thermal relay is connected in series between the equipment and the power supply line, and the normally closed contact of the thermal relay is connected in series in the control circuit of the coil of the AC contactor. When the circuit is over-current, the thermal element generates heat so that The normally closed contact is separated from or disconnected from the coil circuit of the AC contactor, thereby releasing the contactor, and then cutting off the power supply line of the equipment to achieve the purpose of overload protection. Although these protections are simple, the heating and bending of the thermal element of the thermal relay requires a certain amount of time. Time will cause the problem that the action is not timely enough. At the same time, the influence of instantaneous large current and ambient temperature may also easily cause the malfunction of the thermal element and affect the normal operation of the equipment.

Therefore, it is necessary to propose an electromagnetic switch with overload protection to solve the above problems.

Contents of the invention

In order to solve the above problems, the present invention proposes an electromagnetic switch with overload protection to solve the above problems.

The present invention is realized through the following technical solutions:

The present invention proposes an electromagnetic electric switch with overload protection, including a protective shell, an electromagnetic adsorption device, a protective device, and a capacitor. The electromagnetic adsorption device, the protective device, and the capacitor are all fixedly accommodated in the protective shell. The protective shell is provided with a power input end and a power output end, the protection device is electrically connected to the power output end, the capacitor is connected in parallel with the power output end, and the protection device includes a first fixed shell, a connection assembly , a conductive member, the first fixed shell is fixedly connected to one end of the electromagnetic adsorption device, and one side of the first fixed shell is provided with a first positive pole access position, a first positive pole output position, and a first negative pole connection part, so The connecting component is slidably connected to one end of the first fixed shell and faces the electromagnetic adsorption device, the conductive member is fixedly connected to the other end of the first fixed shell and extends to the connecting component, and one end of the connecting component is connected to the connecting component. The first positive pole access position is electrically connected, the first positive pole output position is electrically connected to the conductive member, and the first positive pole access position and one end of the first negative pole connection part are both connected to the electromagnetic adsorption The device is electrically connected, the first positive output bit and the other end of the first negative connection part are electrically connected to the output end of the power supply. The connection component is in contact with the conductive member and forms an electrical connection. When the circuit is overloaded and powered, the increased magnetic force of the electromagnetic adsorption device will attract a part of the connection component into the electromagnetic adsorption device so that the connection component is broken. contact and electrical connection with the conductive member.

Further, the connection assembly includes an iron ring, a sliding rod, a sliding shell, a first elastic member, a conductive rod, and a rear cover, the iron ring is fixedly connected to one end of the sliding shell, and the sliding rod is accommodated in the sliding inside the shell and is slidably connected with the sliding shell and runs through the iron ring, the sliding rod is in contact with the iron ring, one end of the first elastic member is in contact with the sliding shell, and one end of the sliding rod is provided with A supporting ring, the other end of the first elastic member abuts against the supporting ring, the conductive rod is inserted into the sliding rod, the conductive rod passes through the rear cover, and the rear cover and the sliding shell are separately One end is fixedly connected and covers the sliding rod, and the conductive rod is in contact with the conductive member.

Further, the sliding shell is provided with a first placement groove, a first sliding groove, and a second placement groove, and the first sliding groove is respectively connected with the first placement groove and the second placement groove, so that The iron ring is accommodated in the first placement groove, the sliding rod is accommodated in the first sliding groove, the first elastic member is accommodated in the second placement groove and one end is placed in the second placement groove. The groove wall of the groove abuts, the support ring is aligned with the second placing groove, and the other end of the second elastic member abuts against the support ring.

Further, the groove wall of the second placement groove is evenly distributed with a plurality of anti-skid lines in the circumferential direction.

Further, the sliding rod includes an iron rod and an insulating rod, the iron rod is fixedly connected to one end of the insulating rod and is in contact with the iron ring, an insertion hole is provided in the insulating rod, and a part of the conductive rod is inserted into the insertion hole.

Further, the conductive rod is provided with a first electrical connection position and a second electrical connection position, the first electrical connection position is in contact with the conductive member, and the second electrical connection position is in contact with the first positive electrode access position electrical connection.

Further, a contact piece is provided on the conductive member, and the contact piece is located below the first electrical connection position and is in contact with the first electrical connection position to form an electrical connection.

Further, the electromagnetic adsorption device includes a second fixed shell and an electromagnet, and the second fixed shell is provided with a second positive pole access position, a second positive pole output position, and a second negative pole connection part, and the electromagnet is horizontally Fixedly connected in the second fixed shell and facing the protection device, the electromagnet is provided with a positive pole connection position and a negative pole connection position, and the positive pole connection position is electrically connected with the second positive pole connection position, so The negative pole connection position is electrically connected to the second negative pole connection part, the second positive pole connection position is electrically connected to the second positive pole output position, the second positive pole connection position, the second negative pole connection part They are respectively electrically connected to the power supply input end, and the second positive output bit and the second negative connection part are respectively electrically connected to the protection device.

Further, an avoidance hole for accommodating the connection assembly is provided on the axis of the electromagnet.

Further, one end of the connection assembly is provided with a toggle rod, and the toggle rod passes through the first fixed shell, and the electromagnetic electric switch with overload protection also includes a push button, and the protective shell is provided with a second Two sliding slots, the push button passes through the second sliding slot and is fixedly connected with one end of the toggle rod.

Beneficial effects of the present invention:

The present invention uses an electromagnetic adsorption device to magnetically adsorb the protection device, so that the loop in the circuit can be maintained; when the power input terminal is connected to an external power supply, since the protection device is not in contact with the electromagnetic adsorption device, that is, the connecting component is not in contact with the conductive At this time, the electromagnetic adsorption device does not generate magnetic force, and the push button needs to be manually pushed, so that the protection device is pushed toward the electromagnetic adsorption device and close to the electromagnetic adsorption device to form a circuit. At this time, the electromagnetic adsorption device will continue to magnetically adsorb the protection device, that is, at this time, the connecting component contacts the conductive part and forms an electrical connection. When the voltage of the external power supply is too low, the magnetic force of the electromagnetic adsorption device on the protective device cannot be maintained. Then it is reset under the action of the second elastic member, and the electrical connection formed when the connecting component is out of contact with the conductive member, that is, the circuit is no longer formed, so that it can prevent the adverse effects on the electrical appliances caused by the intermittent low voltage of the external power supply;

The invention adopts the increase of the magnetic force of the electromagnetic adsorption device when the circuit is overloaded to supply power, and then magnetically adsorbs the connecting components, so that the sliding rod slides towards the inside of the electromagnetic adsorption device, that is, the sliding rod protrudes and staggers with the iron ring, and the supporting ring after the staggering into the second placement groove, and the anti-skid pattern on the groove wall of the second placement groove clamps and fixes the support ring, that is, the sliding rod keeps extending into the electromagnetic adsorption device, thereby making the connection component out of contact with the conductive part In this way, the circuit connection can be disconnected in time when the circuit is overloaded, which effectively protects the safe use of electricity for electrical appliances;

The present invention uses a capacitor to provide power supplement for electrical appliances when the external power supply intermittently presents low voltage; when the external power supply intermittently presents low voltage, the protection device resets under the action of the second elastic member, that is, the circuit loop has been disconnected, and the capacitor It can supply power to electrical appliances within a period of time, providing users with a buffer time to cut off the electricity consumption of electrical appliances, which is conducive to protecting the safe use of electrical appliances;

To sum up, the electromagnetic electric switch with overload protection can maintain the loop in the circuit and prevent the adverse effects on the electrical appliances caused by the intermittent low voltage of the external power supply; the electromagnetic adsorption device is used to increase the magnetic force when the circuit is overloaded for power supply. Furthermore, magnetic adsorption is carried out on the connecting components, which effectively protects the safe use of electricity for electrical appliances; capacitors are used to provide power supplements for electrical appliances when the external power supply intermittently appears low voltage, which is conducive to protecting the safe use of electricity for electrical appliances.

Description of drawings

Fig. 1 is the overall schematic diagram of the electromagnetic switch with overload protection of the present invention;

Fig. 2 is a schematic diagram of another angle of the electromagnetic switch with overload protection of the present invention;

3 is a schematic diagram of an electromagnetic adsorption device with an electromagnetic switch with overload protection according to the present invention;

4 is a schematic diagram of another angle of the electromagnetic adsorption device of the electromagnetic electric switch with overload protection of the present invention;

Fig. 5 is an exploded view of the connection assembly of the electromagnetic switch with overload protection of the present invention;

Fig. 6 is an exploded view of the protection device of the electromagnetic switch with overload protection of the present invention;

Fig. 7 is a cross-sectional view of the protection device of the electromagnetic switch with overload protection of the present invention;

Fig. 8 is a perspective view of the protection device of the electromagnetic switch with overload protection of the present invention;

Fig. 9 is a schematic diagram of another angle of the protection device of the electromagnetic switch with overload protection according to the present invention;

Fig. 10 is a schematic diagram of a conductive rod of an electromagnetic switch with overload protection according to the present invention;

Fig. 11 is a schematic diagram of the conductive parts of the electromagnetic switch with overload protection of the present invention;

Fig. 12 is a schematic diagram of a sliding bar of an electromagnetic switch with overload protection according to the present invention;

FIG. 13 is a schematic diagram of a sliding case of an electromagnetic switch with overload protection according to the present invention.

The reference signs are as follows:

Protective shell 1; power input terminal 11; first positive connection position 111; first negative connection position 112; power output terminal 12; second positive connection position 121; second negative connection position 122; second sliding groove 13; first flag 14; second flag 15;

Electromagnetic adsorption device 2; second fixed shell 21; second positive pole access position 211; second positive pole output position 212; second negative pole connection part 213; second negative pole access position 2131; second negative pole output position 2132; fixed position 214; Electromagnet 22; Positive pole connection position 221; Negative pole connection position 222; Avoidance hole 223;

Protection device 3; first fixed shell 31; first positive pole access position 311; first positive pole output position 312; first negative pole connection part 313; first negative pole access position 3131; first negative pole output position 3132; fixing plate 314 ; Sliding cavity 315; Connecting assembly 32; Iron ring 321; Sliding rod 322; Support ring 3221; Iron rod 3222; Two placement grooves 3233; anti-slip lines 32331; first elastic member 324; conductive rod 325; first electrical connection position 3251; second electrical connection position 3252; the second elastic member 34;

Capacitor 4;

Push button 5.

Detailed ways

In order to describe the technical solution of the present invention more clearly and completely, the present invention will be further described below in conjunction with the accompanying drawings.

Please refer to Figures 1-13, the present invention proposes an electromagnetic switch with overload protection, including a protective case 1, an electromagnetic adsorption device 2, a protection device 3, and a capacitor 4. The electromagnetic adsorption device 2, the protection device 3, and the capacitor 4 are all Fixedly stored in the protective case 1, the protective case 1 is provided with a power input terminal 11 and a power output terminal 12, the protection device 3 is electrically connected to the power output terminal 12, the capacitor 4 is connected in parallel with the power output terminal 12, and the protection device 3 includes a first fixed Shell 31, connection assembly 32, conductive member 33, the first fixed shell 31 is fixedly connected to one end of the electromagnetic adsorption device 2, and one side of the first fixed shell 31 is provided with a first positive pole access position 311, a first positive pole output position 312, a second A negative connection part 313, the connection assembly 32 is slidably connected to one end of the first fixed shell 31 and faces the electromagnetic adsorption device 2, the conductive member 33 is fixedly connected to the other end of the first fixed shell 31 and extends to the connection assembly 32, one end of the connection assembly 32 is connected to the The first positive pole access position 311 is electrically connected, the first positive pole output position 312 is electrically connected to the conductive member 33, and one end of the first positive pole access position 311 and the first negative pole connection part 313 is electrically connected with the electromagnetic adsorption device 2, the first The positive output position 312 and the other end of the first negative connection part 313 are electrically connected to the power supply output terminal 12. When the circuit is normally powered, the electromagnetic adsorption device 2 absorbs the connecting component 32 so that the connecting component 32 contacts the conductive member 33 and forms an electrical connection. , when the circuit is overloaded for power supply, the increased magnetic force of the electromagnetic adsorption device 2 will attract a part of the connection assembly 32 into the electromagnetic adsorption device 2 so that the connection assembly 32 breaks the contact and electrical connection with the conductive member 33 .

In this embodiment:

The protective shell 1 is used to provide a protective structure for the electromagnetic adsorption device 2, the protective device 3, and the capacitor 4;

The power input terminal 11 is used to connect to an external circuit. The power input terminal 11 includes a first positive connection position 111 and a first negative connection position 112. The first positive connection position 111 is connected to the positive line of the external circuit, and the first negative connection position 112 Access the negative pole line of the external circuit, the first positive pole connection position 111 and the second positive pole access position 211 on the electromagnetic adsorption device 2 are electrically connected through a conductive wire, and the first negative pole connection position 112 is connected to the second negative pole on the electromagnetic adsorption device 2 The connecting part 213 is electrically connected through a conductive wire;

The power supply output terminal 12 is used to connect to external electrical appliances. The power supply output terminal 12 includes a second positive pole connection position 121 and a second negative pole connection position 122. The second positive pole connection position 121 is connected to the first positive pole on the protection device 3 through a conductive wire. The position 312 is electrically connected, the second negative connection position 122 is electrically connected to the first negative connection part 313 through a conductive wire, the capacitor 4 is connected in parallel with the second positive connection position 121 and the second negative connection position 122, the second positive connection position 121, the second The two negative pole connection positions 122 are respectively connected to the positive pole and the negative pole of the external electrical appliance;

The electromagnetic adsorption device 2 is used to adsorb the protection device 3 by electromagnetic force;

The protection device 3 is used in conjunction with the electromagnetic adsorption device 2 to disconnect the circuit circuit when the circuit is overloaded;

The first fixed shell 31 is used to provide a sliding support structure for the connecting assembly 32;

The first positive pole access position 311 is used to connect the second positive pole output position 212 in the electromagnetic adsorption device 2 through a conductive wire;

The first positive output position 312 is used to connect the second positive connection position 121 on the output terminal 12 of the power supply through a conductive wire;

The first negative connection part 313 is used to respectively connect the second negative connection part 213 and the second negative connection position 122 on the power output terminal 12 through conductive wires. The first negative connection part 313 includes a first negative connection position 3131, a first The negative pole output position 3132, the first negative pole access position 3131 is electrically connected to the second negative pole connection part 213 through a conductive line, and the first negative pole output position 3132 is electrically connected to the second negative pole connection position 122 through a conductive line;

The connecting component 32 is used for being attracted by the magnetic force of the electromagnetic adsorption device 2, and after being attracted by the magnetic force of the electromagnetic adsorption device 2, it slides relative to the first fixed shell 31 and contacts with the conductive member 33 to form an electrical connection;

The conductive member 33 is used to form an electrical connection with the connection assembly 32, and the conductive member 33 is electrically connected to the first positive output position 312 through a conductive wire;

Capacitor 4 is used to provide power supplement for electrical appliances when the external power supply intermittently presents low voltage;

Specifically, the first fixed shell 31 is provided with a sliding cavity 315, and the connecting component 32 runs through the sliding cavity 315;

The protection device 3 also includes a second elastic member 34 through which the connecting assembly 32 passes. One end of the second elastic member 34 abuts against the first fixed shell 31 , and the other end of the second elastic member 34 abuts against the connecting assembly 32 . The second elastic member 34 is a spring, which is used to provide elastic supporting force for the reset of the connecting assembly 32;

When the power input terminal 11 is connected to an external power source, since the protection device 3 is not in contact with the electromagnetic adsorption device 2, that is, the connecting component 32 is not in contact with the conductive member 33 and forms an electrical connection, the electromagnetic adsorption device 2 does not generate magnetic force at this time. , it is necessary to manually push the push button 5, so that the protection device 3 is pushed towards the electromagnetic adsorption device 2 and close to the electromagnetic adsorption device 2 to form a circuit. When the circuit is formed, the electromagnetic adsorption device 2 continues to magnetically adsorb the protection device. 3. That is, at this time, the connection assembly 32 is in contact with the conductive member 33 and forms an electrical connection. When the voltage of the external power supply is too low, the magnetic force of the electromagnetic adsorption device 2 to the protection device 3 cannot be maintained. At this time, the connection assembly 32 is in the second elastic state. Reset under the action of part 34, after reset, the electrical connection formed when the connecting component 32 is out of contact with the conductive part 33, that is, the circuit is no longer formed, so that it can prevent the external power supply from intermittently appearing low voltage.

When the circuit is overloaded, the magnetic force of the electromagnetic adsorption device 2 increases when the circuit is overloaded and supplies power, and the increased magnetic force can perform excessive magnetic adsorption on the connection assembly 32, so that a part of the structure in the connection assembly 32 is inserted into the electromagnetic adsorption device. 2, and then make the electrical connection formed when the connection assembly 32 and the conductive member 33 are out of contact, so that the circuit connection can be disconnected in time when the circuit is overloaded to supply power, effectively protecting the safe use of electricity of the consumer;

When low voltage occurs intermittently in the external power supply, the protection device 3 is reset under the action of the second elastic member 34, that is, the circuit loop has been disconnected, and the capacitor 4 can supply power to the electrical appliances for a period of time, providing the user with a cut-off function. The buffer time of electrical appliances is beneficial to protect the safe use of electrical appliances.

Further, the connection assembly 32 includes an iron ring 321, a sliding rod 322, a sliding housing 323, a first elastic member 324, a conductive rod 325, and a rear cover 326. The iron ring 321 is fixedly connected to one end of the sliding housing 323, and the sliding rod 322 is accommodated in the sliding The shell 323 is slidingly connected with the sliding shell 323 and runs through the iron ring 321. The sliding bar 322 is in contact with the iron ring 321. One end of the first elastic member 324 is in contact with the sliding shell 323. One end of the sliding bar 322 is provided with a supporting ring 3221. The other end of the elastic member 324 abuts against the supporting ring 3221, the conductive rod 325 is inserted into the sliding rod 322, the conductive rod 325 penetrates the rear cover 326, the rear cover 326 is fixedly connected with the other end of the sliding shell 323 and blocks the sliding rod 322, the conductive rod 325 and The conductive member 33 contacts; the sliding shell 323 is provided with a first placement groove 3231, a first sliding groove 3232, and a second placement groove 3233, and the first sliding groove 3232 is respectively connected with the first placement groove 3231 and the second placement groove 3233, The iron ring 321 is accommodated in the first placement groove 3231, the sliding rod 322 is accommodated in the first sliding groove 3232, the first elastic member 324 is accommodated in the second placement groove 3233 and one end abuts against the groove wall of the second placement groove 3233 , the support ring 3221 is aligned with the second placement groove 3233, and the other end of the second elastic member 34 abuts against the support ring 3221; the groove wall of the second placement groove 3233 is evenly distributed with a plurality of anti-slip lines 32331 in the circumferential direction; the sliding rod 322 includes an iron rod 3222, insulating rod 3223, the iron rod 3222 is fixedly connected to one end of the insulating rod 3223 and is in contact with the iron ring 321, the insulating rod 3223 is provided with an insertion hole 32231, and a part of the conductive rod 325 is inserted into the insertion hole 32231; the conductive rod 325 is provided with a second One electrical connection position 3251, the second electrical connection position 3252, the first electrical connection position 3251 is in contact with the conductive member 33, the second electrical connection position 3252 is electrically connected with the first positive access position 311; the conductive member 33 is provided with a contact piece 331 , the contact piece 331 is located under the first electrical connection position 3251 and is in contact with the first electrical connection position 3251 to form an electrical connection.

In this embodiment:

The iron ring 321 is used to be adsorbed by the electromagnetic adsorption device 2;

The sliding rod 322 is used to slide into the electromagnetic adsorption device 2;

The supporting ring 3221 is used to be stuck in the second placement groove 3233 when the sliding rod 322 slides toward the end of the electromagnetic adsorption device 2, so that the sliding rod 322 can stay in the extended position. Meanwhile, the supporting ring 3221 is also used to give The first elastic member 324 provides an elastic support structure. When the circuit is powered normally, the connecting assembly 32 is magnetically attracted, and the first elastic member 324 supports the support ring 3221, so that the sliding bar 322 will not be magnetically attracted by the normal power supply. Enter the electromagnetic adsorption device 2;

The iron rod 3222 is used to be adsorbed by the electromagnetic adsorption device 2;

The insulating rod 3223 is used to isolate the electrical connection between the iron rod 3222 and the conductive rod 325;

The insertion hole 32231 is used to provide a space for the conductive rod 325 to be inserted and fixed;

The sliding shell 323 is used to provide a stable support structure for the iron ring 321 and the sliding rod 322;

The first placement groove 3231 is used to provide a placement space for the iron ring 321;

The first sliding groove 3232 is used to provide a sliding space for the sliding bar 322;

The second placement groove 3233 is used to provide a placement space for the first elastic member 324, and also provide a storage space for the support ring 3221 when sliding;

The anti-skid pattern 32331 is used to increase the friction between the support ring 3221 and the groove wall of the second placement groove 3233, so that the support ring 3221 can stay in the second placement groove 3233;

The first elastic member 324 is a spring, which is used to provide an elastic supporting force for the sliding bar 322 when it is reset, so that the sliding bar 322 will not be attracted into the electromagnetic adsorption device 2 by the magnetic force of the normal power supply;

The conductive rod 325 is used for conducting electricity;

The first electrical connection position 3251 is used to contact the contact piece 331 and form an electrical connection;

The second electrical connection position 3252 is used to form an electrical connection with the first positive access position 311 through a conductive wire;

The rear cover 326 is used to prevent the sliding bar 322 from sliding out of the first sliding groove 3232;

The contact piece 331 is a copper piece, which is used to contact the first electrical connection position 3251 and form an electrical connection;

Specifically, the magnetic force of the electromagnetic adsorption device 2 will increase instantaneously when the circuit is overloaded for power supply, and the magnetic force will magnetically adsorb the connecting component 32. In this case, the sliding rod 322 slides toward the inside of the electromagnetic adsorption device 2, that is, the sliding rod 322 stretches out and contacts with the iron. The ring 321 is staggered, and after the staggering, the support ring 3221 enters into the second placement groove 3233, and the anti-skid pattern 32331 on the groove wall of the second placement groove 3233 clamps and fixes the support ring 3221, that is, the sliding rod 322 will be maintained at In the state of protruding into the electromagnetic adsorption device 2, the electrical connection formed when the first electrical connection position 3251 on the conductive rod 325 is out of contact with the contact piece 331 on the conductive member 33, the electromagnetic adsorption device 2 is then turned off after the power is turned off. No magnetic force is generated, the connection assembly 32 is reset, the first electrical connection position 3251 is still not in contact with the contact piece 331 after the reset, and the elastic force of the first elastic member 324 is not enough to push the support ring 3221 to reset, and the sliding rod 322 is still in the position of In the state of protruding into the electromagnetic adsorption device 2, the circuit connection can be disconnected in time when the circuit is overloaded to supply power, effectively protecting the safe power consumption of the electrical appliance.

Further, the electromagnetic adsorption device 2 includes a second fixed shell 21 and an electromagnet 22. The second fixed shell 21 is provided with a second positive pole access position 211, a second positive pole output position 212, and a second negative pole connection part 213. The electromagnet 22 is horizontally fixedly connected in the second fixed shell 21 and faces the protection device 3. The electromagnet 22 is provided with a positive connection position 221 and a negative connection position 222. The positive connection position 221 is electrically connected to the second positive connection position 211, and the negative connection position The position 222 is electrically connected to the second negative connection part 213, the second positive connection position 211 is electrically connected to the second positive output position 212, and the second positive connection position 211 and the second negative connection part 213 are electrically connected to the power input terminal 11 respectively. connection, the second positive output position 212 and the second negative connection part 213 are respectively electrically connected to the protection device 3; the axis of the electromagnet 22 is provided with an avoidance hole 223 for accommodating the connection assembly.

In this embodiment:

The second fixed shell 21 is used to provide a stable support structure for the electromagnet 22;

The second positive connection position 211 is used to connect the first positive connection position 111 on the power input terminal 11 through a conductive wire;

The second positive pole output position 212 is used to connect the first positive pole access position 311 on the protection device 3 through a conductive wire;

The second negative connection part 213 is used to connect the first negative connection part 112 on the power input terminal 11 and the first negative connection part 313 on the protection device 3 through a conductive wire, and the second negative connection part 213 includes the second negative connection part 2131, the second negative output position 2132, the second negative access position 2131 is electrically connected to the first negative connection position 112 through a conductive wire, and the second negative output position 2132 is electrically connected to the first negative connection position 3131 through a conductive line;

The electromagnet 22 is used to absorb the connecting component 32 through magnetic force;

The positive connection position 221 is used to electrically connect with the second positive connection position 211 through a conductive wire;

The negative electrode connection position 222 is used to electrically connect with the second negative electrode connection part 213 through a conductive wire;

The escape hole 223 is used to provide a place for the iron rod 3222;

Specifically, one end of the second fixed shell 21 is provided with a fixed position 214, one end of the first fixed shell 31 is provided with a fixed plate 314, and the fixed plate 314 is fixedly connected with the fixed position 214;

When the circuit is powered normally, the magnetic force produced by the electromagnet 22 is only enough to attract the connecting assembly 32, but not enough to suck out the iron rod 3222. When the circuit is overloaded for power supply, the magnetic force produced by the electromagnet 22 increases and increases The magnetic force can quickly suck out the iron rod 3222, so that the iron rod 3222 enters the avoidance hole 223, and after the iron rod 3222 enters the avoidance hole 223, the conductive rod 325 located at the other end of the sliding rod 322 is separated from the conductive member 33. contacts, thereby de-energizing the circuit.

Further, one end of the connecting assembly 32 is provided with a toggle lever 327, the toggle lever 327 runs through the first fixed shell 31, the electromagnetic switch with overload protection also includes a push button 5, and the side of the protective shell 1 is provided with a second sliding groove 13 , the push button 5 passes through the second sliding groove 13 and is fixedly connected with one end of the toggle rod 327 .

In this embodiment:

The toggle lever 327 is used to provide a structure for the connection assembly 32 to be easily toggled by the user;

The push button 5 is used to provide the user with a structure that facilitates the sliding of the toggle lever 327;

The second sliding groove 13 is used to push the button 5 to provide a sliding space;

Specifically, a first mark 14 and a second mark 15 are provided on one side of the second sliding groove 13. The first mark 14 is when the connecting assembly 32 is adsorbed on the electromagnet 22 and the sliding rod 322 does not extend into the electromagnet 22. The corresponding position of the push button 5 in the avoidance hole 223 on the top, that is, the push button 5 is located above the first mark 14 at this time; The corresponding position of the push button 5, that is, the push button 5 is located above the second sign 15 at this time; when the user is in use, after turning on the power, the push button 5 is pushed to the top of the first sign 14, and the internal circuit of the present invention then conduction, when the circuit is overloaded for power supply, the toggle lever 327 will slide under the drive of the connecting component 32, thereby driving the push button 5 to the top of the second sign 15, and the user can judge by the position where the push button 5 stays The power outage situation of the present invention.

Certainly, the present invention may also have other various implementation modes. Based on this implementation mode, other implementation modes obtained by those skilled in the art without any creative work shall fall within the protection scope of the present invention.

Claims (10)

1. The utility model provides an electromagnetic electric switch who possesses overload protection, its characterized in that, includes protective housing, electromagnetism adsorption equipment, protection device, condenser, electromagnetism adsorption equipment the protection device the condenser all fixed accept in the protective housing, the protective housing is equipped with power input end, power output end, protection device with power output end electricity is connected, the condenser with power output end is parallelly connected, protection device includes first set casing, coupling assembling, electrically conductive piece, first set casing with electromagnetism adsorption equipment one end fixed connection, first set casing one side is equipped with first positive pole and inserts position, first positive pole output position, first negative pole connecting portion, coupling assembling with first set casing one end sliding connection and orientation electromagnetism adsorption equipment, electrically conductive piece fixed connection in the first set casing other end and extend to coupling assembling, coupling assembling one end with first positive pole inserts the position electricity and connects, first positive pole output position with the electricity is connected, first positive pole insert the position, first negative pole one end all with electromagnetism adsorption equipment electricity is connected, first positive pole output position with the one end of first negative pole connecting portion all with electromagnetism adsorption equipment electricity is connected when the electromagnetism adsorption equipment gets into the coupling assembling, the magnetism power supply circuit electricity is connected with the adsorption equipment electricity, the electricity is connected with the magnetism connection assembly that adsorbs the electricity, makes the electromagnetism adsorption equipment get into the electricity and adsorb the magnetism connection assembly that the electricity is connected in the magnetism connection assembly that adsorbs the electricity.

2. The electromagnetic switch with overload protection as claimed in claim 1, wherein the connecting assembly includes an iron ring, a sliding rod, a sliding casing, a first elastic member, a conductive rod, and a rear cover, the iron ring is fixed to one end of the sliding casing, the sliding rod is received in the sliding casing, slidably connected to the sliding casing, and penetrates through the iron ring, the sliding rod contacts with the iron ring, one end of the first elastic member abuts against the sliding casing, one end of the sliding rod is provided with a supporting ring, the other end of the first elastic member abuts against the supporting ring, the conductive rod is inserted into the sliding rod, the conductive rod penetrates through the rear cover, the rear cover is fixed to the other end of the sliding casing, and shields the sliding rod, and the conductive rod contacts with the conductive member.

3. The electromagnetic switch with overload protection according to claim 2, wherein a first placement groove, a first sliding groove, and a second placement groove are provided in the slider case, the first sliding groove is respectively in conduction with the first placement groove and the second placement groove, the iron ring is housed in the first placement groove, the sliding bar is housed in the first sliding groove, the first elastic member is housed in the second placement groove, one end of the first elastic member abuts against a groove wall of the second placement groove, the support ring is aligned with the second placement groove, and the other end of the first elastic member abuts against the support ring.

4. The electromagnetic switch with overload protection as claimed in claim 3, wherein the groove wall of the second placement groove is circumferentially provided with a plurality of anti-slip threads.

5. The electromagnetic switch with overload protection as claimed in claim 2, wherein the sliding rod includes an iron rod and an insulating rod, the iron rod is fixedly connected to one end of the insulating rod and contacts with the iron ring, an insertion hole is formed in the insulating rod, and a portion of the conductive rod is inserted into the insertion hole.

6. The electromagnetic switch with overload protection as claimed in claim 2, wherein the conductive rod is provided with a first electrical connection site and a second electrical connection site, the first electrical connection site contacts with the conductive member, and the second electrical connection site is electrically connected with the first positive access site.

7. The electromagnetic switch with overload protection as claimed in claim 6, wherein the conductive member has a contact piece thereon, the contact piece being located below the first electrical connection site and contacting and making electrical connection with the first electrical connection site.

8. The electromagnetic electric switch with overload protection as claimed in claim 1, wherein the electromagnetic absorption device includes a second fixed housing and an electromagnet, the second fixed housing is provided with a second positive electrode connection position, a second positive electrode output position and a second negative electrode connection portion, the electromagnet is transversely and fixedly connected in the second fixed housing and faces the protection device, the electromagnet is provided with a positive electrode connection position and a negative electrode connection position, the positive electrode connection position is electrically connected with the second positive electrode connection position, the negative electrode connection position is electrically connected with the second negative electrode connection portion, the second positive electrode connection position is electrically connected with the second positive electrode output position, the second positive electrode connection position and the second negative electrode connection portion are respectively electrically connected with the power input end, and the second positive electrode output position and the second negative electrode connection portion are respectively electrically connected with the protection device.

9. The electromagnetic switch with overload protection as claimed in claim 8, wherein the electromagnet has an axial hole for receiving the connecting assembly.

10. The electromagnetic switch with overload protection as claimed in claim 1, wherein the connecting member has a pulling rod at one end, the pulling rod passes through the first fixed casing, the electromagnetic switch with overload protection further includes a push button, a second sliding slot is provided at one side of the protective casing, and the push button passes through the second sliding slot and is fixedly connected to one end of the pulling rod.

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