CN111668069A

CN111668069A - Electromagnetic relay

Info

Publication number: CN111668069A
Application number: CN202010452973.4A
Authority: CN
Inventors: 朱永安; 沈金鹏; 陈刚
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-09-15

Abstract

The invention belongs to the technical field of relays, and particularly relates to an electromagnetic relay which comprises a relay main body, a display screen and a wiring board, wherein the display screen is arranged on the relay main body; a rear cover, an upper cover and a lower cover are arranged on the outer sides of the relay main body and the wiring board; the left end and the right end of the rear cover are symmetrically provided with U-shaped sliding chutes; a fixed block with a built-in cavity is arranged at the end part of the lower end of the U-shaped chute, and an inserting module arranged in the cavity of the fixed block is used for movably connecting the lower cover; the invention can more conveniently disassemble or replace the protective device of the relay, is not easy to damage the protective device in the replacement process, and has the functions of improving the safety of the maintenance process and the like.

Description

Electromagnetic relay

Technical Field

The invention belongs to the technical field of relays, and particularly relates to an electromagnetic relay.

Background

An electromagnetic relay is an electronic control device having a control system (also called an input circuit) and a controlled system (also called an output circuit), and is generally applied to an automatic control circuit, and actually is an "automatic switch" for controlling high voltage and high current by switching on and off low voltage and weak current circuits. Therefore, the circuit has the functions of automatic adjustment, safety protection, circuit conversion and the like; the electromagnetic relay protection device is mainly characterized in that a protection shell is installed through bolts to fix a relay, when the relay is maintained or replaced after being connected with electricity, the bolts are easy to rust due to the fact that the bolts are not dismounted for a long time, so that dismounting is troublesome, the relay is easy to damage in the opening process, a large amount of overhaul time is consumed when the shell is dismounted, and the problem that a circuit is broken down and the sensitivity of a control system is reduced due to the fact that timely maintenance and overhaul cannot be achieved in part of overhaul periods is solved; in addition, in the prior art, the relay is usually overhauled in a live way, and in the process of line overhauling, line changing or wiring of a wiring board in the relay, electric shock danger is usually caused by misoperation; therefore, in order to improve the convenience of relay maintenance, the invention provides an electromagnetic relay.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention aims to provide an electromagnetic relay, which can be used for conveniently disassembling or replacing a protective device of the relay, is not easy to damage the protective device in the replacement process, improves the safety of the maintenance process and the like, and effectively solves the problems in the background art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to an electromagnetic relay, which comprises a relay main body, a display screen and a wiring board, wherein the display screen is arranged on the relay main body; a rear cover, an upper cover and a lower cover are arranged on the outer sides of the relay main body and the wiring board; the left end and the right end of the rear cover are symmetrically provided with U-shaped sliding chutes; a fixed block with a built-in cavity is arranged at the end part of the lower end of the U-shaped chute, and an inserting module arranged in the cavity of the fixed block is used for movably connecting the lower cover;

the plug-in module comprises a locking rod, a first limiting plate, a telescopic spring, a second limiting plate and a clamping rod; the first limiting plate and the second limiting plate are respectively arranged at two ends of the telescopic spring; round holes and rectangular grooves are respectively formed in two sides of the cavity; a clamping groove is formed in the other side of the rectangular groove; one end of the locking rod is fixedly connected with a pull ring, and the other end of the locking rod is inserted into one end, far away from the relay main body, of the fixing block, sequentially penetrates through the clamping groove, the rectangular groove, the first limiting plate, the telescopic spring and the second limiting plate and extends into the round hole; the clamping rod is positioned in the clamping groove and is fixedly connected with the locking rod;

sliding plates are arranged on the left side and the right side of the lower cover; the sliding plate is provided with a sliding through groove and a linkage shaft; the linkage shaft is used for connecting the sliding plate in the U-shaped sliding chute in a sliding manner; the other end of the sliding plate is provided with a first clamping hole; a second clamping hole is formed in the transverse groove at the end part of the lower end of the U-shaped sliding groove; the first clamping hole, the second clamping hole and the round hole are correspondingly arranged and used for limiting the locking rod; the outer side wall is sleeved with an upper rotating shaft and a lower rotating shaft, the lower rotating shaft is respectively connected with the U-shaped sliding grooves in a sliding mode, and the upper rotating shaft is connected with the sliding holes of the two sliding plates in a sliding mode.

The relay main body is installed in a coating mode through the rear cover, the upper cover and the lower cover, so that the relay main body and the wiring board are fully protected, and the relay main body and the wiring board are prevented from being exposed in the air and easily infected with dust and water vapor to cause danger in the use process of the relay; the lower cover is matched with the U-shaped sliding groove arranged on the rear cover through the sliding plates arranged on the two sides, so that the lower cover can slide up and down relative to the upper cover, the lower cover is opened to expose the wiring board, and a good protection effect is achieved on the wiring terminal in the use process while the wiring or wire changing operation is carried out by workers; because the lower cover and the sliding plate are usually plastic pieces, and the upper rotating shaft and the lower rotating shaft rotate, the friction force of the sliding plate in the U-shaped sliding chute is effectively reduced, so that the sliding fluency of the sliding plate is improved, the condition that the plastic pieces are broken due to the long-term large friction force in the moving process is avoided, and the service lives of the lower cover and the sliding plate are effectively prolonged; meanwhile, when the maintenance line changing operation of the relay is carried out at night, the lower cover can be quickly pulled up to a stable placing state, the complex operation of disassembling the shell by workers is omitted, and the maintenance efficiency is improved; the work load of the staff after wiring is finished is effectively reduced, the wiring efficiency is improved, and meanwhile, the omission of the protection work on the wiring board is avoided, so that the use safety of the relay is improved, and the service life is prolonged;

preferably, the upper cover is mounted in the upper half area of the front end of the rear cover, and the lower cover is movably mounted in the lower half area of the front end of the rear cover body; a plurality of groups of wiring holes are formed in the straight plate extending from the rear cover to the bottom end of the lower cover; the upper cover and the lower cover are both made of transparent plastic materials; the transverse width of the lower cover is greater than that of the upper cover; a sealing gasket is arranged on the lower end face of the upper cover and is in contact sealing with the upper end face of the lower cover; and a transverse L-shaped supporting plate is arranged at the lower part of the front end of the upper cover and is used for supporting the lower cover which moves upwards. Parameters displayed on the display screen can be visually seen through the upper cover and the lower cover made of transparent plastic materials, so that the using condition of the terminal on the wiring board can be conveniently observed, and the wiring board can be overhauled in time; the transverse width of the lower cover is larger than that of the upper cover, so that wiring boards with different sizes can be conveniently placed in the lower cover, and meanwhile, the sealing effect of connection between the upper cover and the lower cover is effectively improved and the use safety of the wiring boards is improved by matching with the sealing gasket arranged between the upper cover and the lower cover; the lower cover sliding to the outer side of the upper cover is supported by the L-shaped supporting plate arranged transversely on the upper cover, so that the influence of the lower cover sliding off in the maintenance process on the work of workers is further avoided, and the safety of the worker wiring is improved;

preferably, a gap is formed between the bracket arranged on the inner side of the upper cover and the relay main body, and a wiring protection module is connected in the gap in a sliding manner through the bracket; the wiring protection module is used for realizing that a terminal of a wiring board and the relay main body are in a power-off state while the lower cover slides upwards to the surface of the upper cover, and the wiring protection module is electrically connected with the relay main body and the wiring board respectively; the L-shaped supporting plate penetrates through the upper cover and is connected with the wiring protection module, and a moving groove is formed in the part, penetrating through the upper cover, of the L-shaped supporting plate; the protection plates are symmetrically arranged on the two groups of the protection plates relative to the rear cover, the protection plates are provided with protection grooves for inserting the sliding plates, and heteropolar magnets are respectively arranged on the inner walls of the protection grooves corresponding to the insertion ends of the sliding plates. In the installation process, the upper cover forms a gap with the relay main body through the arranged bracket, plays the roles of fixing the limit relay main body and increasing the heat dissipation effect of the relay main body, is convenient for installing the wiring protection module in the bracket, the wiring protection module is respectively electrically connected with the relay main body and the wiring board, so that when the lower cover slides to the surface of the upper cover, the protection groove of the protection plate is matched with the absorption function of the heteropolar magnets arranged on the corresponding insertion ends of the sliding plate, and the L-shaped supporting plate plays a role in supporting and limiting the lower cover, so that the upper cover cannot fall off to interrupt the wiring operation process when the lower cover is required to be pushed to the surface of the upper cover, the terminal of the wiring board can be absolutely ensured to be in a power-off state in the whole wiring process, the stability of the power-off state is effectively improved, and professional or non-professional wiring personnel can be ensured to be safely powered on;

preferably, the wiring protection module comprises a reset button, a sliding rod and two connecting electrode plates; the reset button is arranged in a through hole formed in the upper part of the upper cover in a sliding manner and is used for driving the sliding rod to move so as to disconnect the electric connection state between the two connecting electrode plates; the connecting electrode plate is used for electrically connecting the wiring board and the relay main body. Along with the upward sliding of the lower cover, the reset button is gradually attached to the surface of the upper cover, the reset button is extruded by the lower cover to drive the sliding rod to move so as to disconnect the electric connection state between the two connecting electrode plates, so that after the lower cover is manually opened, the terminal of the wiring board and the relay main body are in a power-off state, the terminal wiring position is powered off when a worker manually performs wiring, and the wiring safety is ensured; after wiring is finished, the lower cover is pulled down by hands, so that the terminal of the wiring board and the relay main body can be in a power connection state, the situation that the wiring board after wiring is exposed in the air and corroded by dust and water vapor due to the fact that workers forget to put down the lower cover and the use of the relay is influenced is avoided, the protection effect on the wiring board is effectively improved, and the use safety of the relay is improved;

preferably, the reset button consists of a first spring, a columnar button with one end provided with an inclined plane and a baffle ring; the columnar button sequentially penetrates through the first spring and the baffle ring; one end of the first spring, which is close to the inclined plane, is fixedly connected to the columnar button, and the other end of the first spring is fixedly connected to the baffle ring; the baffle ring is fixedly connected at a port of the through hole close to the outside; the columnar button is used for driving the sliding rod to move up and down; the slide bar runs through sliding connection on the support, and the upper end of the second spring that the cover was established on the slide bar links firmly on the slide bar, and the lower extreme of second spring then links firmly the upper surface at the support, and the inclined plane that corresponds the column button on the slide bar is equipped with V type groove, and the slide bar passes the one end of connecting L shape layer board on the lower part of support, and the slide bar is through being equipped with the insulator between one of connecting electrode piece and the body of connecting on the terminal surface down, between slide bar and the electrode piece. The structures of the reset button, the sliding rod and the connecting electrode plate and the mode of connecting the reset button, the sliding rod and the connecting electrode plate to the upper cover are easily assembled in the prior art, and when the upper cover is disassembled, the connection stability of the internal connecting structure can be ensured, scattering is avoided, and the maintenance efficiency is effectively improved; when the lower cover is manually opened, the reset button is extruded by a sliding plate on the lower cover in the process of sliding and inserting the sliding plate into the protection plate along the U-shaped sliding groove, the inclined plane of the columnar button is matched with the V-shaped groove on the sliding rod to realize the up-and-down lifting of the sliding rod, the L-shaped supporting plate is automatically lifted to support and limit the lower cover while the bottom connecting electrode plate is driven to be separated from the connecting electrode plate at the upper end of the wiring board, the lower cover is stably stopped on the surface of the upper cover, the stability of power loss of a terminal of the wiring board is ensured, and the safety of wiring is; when the lower cover needs to be closed, the L-shaped supporting plate automatically descends to leave out a moving path of the lower cover while the lower cover is pulled out, smoothness of the lower cover in the original position returning process is guaranteed, the lower cover is convenient to close and protect the wiring terminal, and the service life of the lower cover is prolonged.

The connecting electrode plate is provided with an electric connecting column, a rubber bulge and a slot; the rubber bulge wraps an electric connection pole vertically connected to the electric connection pole piece; the slot and the electric pole are arranged at intervals; the two connecting poles, the rubber bulges and the slots on the two connecting pole pieces are arranged in a staggered mode, and the slot on one connecting pole piece corresponds to the connecting pole on the other connecting pole piece. The inserting grooves and the electric connecting poles which are connected in a matched mode are arranged on the two connecting pole pieces, so that electric arcs are effectively prevented from being generated between the two connecting pole pieces due to staggered friction generated when the two connecting pole pieces are contacted, and the safety of the two connecting pole pieces at the moment of power failure is further improved; meanwhile, the rubber protrusions are used for wrapping the electric connection poles, so that the stability of the electric connection poles when entering the slots is enhanced, the electric connection poles are effectively prevented from being broken and damaged, the service life of the electric connection poles is prolonged, electric arcs can be rapidly absorbed through the rubber protrusions to eliminate the electric arcs, and the instant safety of the two electric connection poles when being powered off is further improved.

The invention has the following beneficial effects:

1. according to the invention, the relay main body is installed in a coating manner through the rear cover, the upper cover and the lower cover, so that the relay main body and the wiring board are fully protected, and the relay main body and the wiring board are prevented from being exposed in the air and easily infected with dust and water vapor to cause danger in the use process of the relay; the lower cover is matched with the rear cover through the sliding plates arranged on two sides to form the U-shaped sliding groove, so that the lower cover can slide up and down relative to the upper cover, the lower cover is opened to expose the wiring board, and when workers perform wiring or wire replacement operation, the lower cover is convenient to play a good protection effect on the wiring terminals in the using process.

2. The lower cover and the sliding plate used in the invention are usually plastic pieces, and under the rotating action of the upper rotating shaft and the lower rotating shaft, the friction force of the sliding plate in the U-shaped sliding chute is effectively reduced, so that the sliding fluency of the sliding plate is improved, the condition that the plastic pieces are broken due to large friction force for a long time in the moving process is avoided, and the service lives of the lower cover and the sliding plate are effectively prolonged.

3. The lower cover can be quickly pulled up to a stable placing state, and when the maintenance and line changing operation of the relay is carried out at night, the complex operation of disassembling the shell by workers is omitted, and the maintenance efficiency is improved; and effectively alleviate the ending work load of the installation dismantled piece after the staff wiring is accomplished, when improving wiring efficiency, more help avoiding omitting the protection work to the wiring board to improve the safety in utilization of relay, and the life of extension.

4. The invention has the advantages that the gap is formed between the bracket arranged on the upper cover and the relay main body, the functions of fixing the limit relay main body and increasing the heat dissipation effect of the relay main body are achieved, meanwhile, the wiring protection module is convenient to be arranged in the bracket, the wiring protection module is respectively electrically connected with the relay main body and the wiring board, so that when the lower cover slides to the surface of the upper cover, the protection groove of the protection plate is matched with the absorption function of the heteropolar magnets arranged on the corresponding insertion ends of the sliding plate, and the L-shaped supporting plate plays a role in supporting and limiting the lower cover, so that the upper cover cannot fall off to interrupt the wiring operation process when the lower cover is required to be pushed to the surface of the upper cover, can absolutely guarantee this moment that the terminal department of whole wiring process wiring board all is in the outage state, effectively improve the stability of outage state to guarantee that professional or non-professional wiring personnel all can connect the electricity safely.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a schematic view of the overall structure of the protection device of the present invention;

FIG. 2 is a side view of FIG. 1;

FIG. 3 is a cross-sectional view A-A of FIG. 2;

FIG. 4 is a schematic view of the connection of the sliding plate, the linkage shaft and the U-shaped chute of the present invention;

FIG. 5 is an enlarged view of a portion of FIG. 2 at B;

FIG. 6 is a state diagram of the use of FIG. 2;

FIG. 7 is an enlarged view of a portion of FIG. 6 at C;

in the figure: the relay comprises a relay main body 1, a display screen 2, a wiring board 3, a rear cover 4, an upper cover 5, a lower cover 6, a U-shaped sliding groove 7, a second clamping hole 71, a plugging module 8, a locking rod 81, a first limiting plate 82, a telescopic spring 83, a second limiting plate 84, a clamping rod 85, a sliding plate 9, a sliding through groove 91, a linkage shaft 92, a first clamping hole 93, an upper rotating shaft 94, a lower rotating shaft 95, a sealing gasket 10, an L-shaped supporting plate 11, a support 12, a wiring protection module 13, a reset button 131, a sliding rod 132, a connecting electrode sheet 133, a through hole 134, a first spring 135, a columnar button 136, a baffle ring 137, a second spring 138, a V-shaped groove 139, a moving groove 14, a protection plate 15, a power connection post 16, a rubber bulge 17 and a slot 18;

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 7, an electromagnetic relay according to the present invention includes a relay main body 1, a display screen 2 and a wiring board 3, wherein the display screen 2 is mounted on the relay main body 1, and the wiring board 3 is located below the relay main body 1; a rear cover 4, an upper cover 5 and a lower cover 6 are arranged on the outer sides of the relay main body 1 and the wiring board 3; the left end and the right end of the rear cover 4 are symmetrically provided with U-shaped sliding chutes 7; a fixed block 8 with a built-in cavity is arranged at the end part of the lower end of the U-shaped chute 7, and an inserting module 8 arranged in the cavity of the fixed block 8 is used for movably connecting the lower cover 6;

the plugging module 8 comprises a locking rod 81, a first limit plate 82, a telescopic spring 83, a second limit plate 84 and a clamping rod 85; the first limit plate 82 and the second limit plate 84 are respectively installed at two ends of the extension spring 83; round holes and rectangular grooves are respectively formed in two sides of the cavity; a clamping groove is formed in the other side of the rectangular groove; one end of the locking rod 81 is fixedly connected with a pull ring, and the other end of the locking rod 81 is inserted into one end of the fixing block 8, which is far away from the relay main body 1, sequentially passes through the clamping groove, the rectangular groove, the first limiting plate 82, the telescopic spring 83 and the second limiting plate 84 and extends into the circular hole; the clamping rod 85 is positioned in the clamping groove and is fixedly connected with the locking rod 81;

sliding plates 9 are arranged on the left side and the right side of the lower cover 6; the sliding plate 9 is provided with a sliding through groove 91 and a linkage shaft 92; the linkage shaft 92 is used for connecting the sliding plate 9 in the U-shaped sliding chute 7 in a sliding manner; the other end of the sliding plate 9 is provided with a first clamping hole 93; a second clamping hole 71 is formed in the transverse groove at the lower end part of the U-shaped sliding groove 7; the first clamping hole 93, the second clamping hole 71 and the round holes are correspondingly arranged for limiting the locking rod 81; the outer side wall is sleeved with an upper rotating shaft 94 and a lower rotating shaft 95, the lower rotating shaft 95 is respectively connected with the U-shaped sliding chutes 7 in a sliding manner, and the upper rotating shaft 94 is connected with the sliding holes of the two groups of sliding plates 9 in a sliding manner; when the relay protection device works, the relay main body 1 is installed in a coating mode through the rear cover 4, the upper cover 4 and the lower cover 6, so that the relay main body 1 and the wiring board 3 are fully protected, and the relay main body and the wiring board 3 are prevented from being exposed in air and easily infected with dust and water vapor to cause danger in the use process of the relay; the lower cover 6 is matched with the U-shaped sliding groove 7 arranged on the rear cover 4 through the sliding plates 9 arranged on two sides, so that the lower cover 6 can slide up and down relative to the upper cover 5, the lower cover 6 is opened to expose the wiring board 3, and when workers carry out wiring or wire changing operation, the lower cover is convenient to play a good protection effect on the wiring terminals in the using process.

As shown in fig. 1 to 2, an upper cover 5 is mounted on the upper half area of the front end of the rear cover 4, and a lower cover 6 is movably mounted on the lower half area of the front end of the rear cover 4; a plurality of groups of wiring holes are formed in a straight plate extending from the rear cover 4 to the bottom end of the lower cover 6; the upper cover 5 and the lower cover 6 are both made of transparent plastic materials; the transverse width of the lower cover 6 is larger than that of the upper cover 5; a sealing gasket 10 is arranged on the lower end face of the upper cover 5, and the sealing gasket 10 is in contact sealing with the upper end face of the lower cover 6; the lower part of the front end of the upper cover 5 is provided with a transverse L-shaped supporting plate 11, and the L-shaped supporting plate 11 is used for supporting the lower cover 6 which moves upwards. When the terminal box works, parameters displayed on the display screen 2 can be visually seen through the upper cover 5 and the lower cover 6 made of transparent plastic materials, so that the use condition of the terminal on the wiring board 3 can be conveniently observed, and the terminal box is favorable for timely overhauling the wiring board 3; the transverse width of the lower cover 6 is larger than that of the upper cover 5, so that wiring boards 3 with different sizes can be conveniently placed in the lower cover 6, and meanwhile, the sealing effect of connection between the upper cover 5 and the lower cover 6 is effectively improved and the use safety of the wiring boards 3 is improved by matching with the sealing gasket 10 arranged between the upper cover 5 and the lower cover 6; through the L-shaped supporting plate 11 transversely arranged on the upper cover 5, the lower cover 6 sliding to the outer side of the upper cover 5 is supported, the influence of the lower cover 6 sliding in the maintenance process on the work of workers is further avoided, and the wiring safety of the workers is improved.

As shown in fig. 2, 5 and 6, a gap is formed between a bracket 12 arranged on the inner side of the upper cover 5 and the relay main body 1, and a wiring protection module 13 is connected in the gap in a sliding manner through the bracket 12; the wiring protection module 13 is used for realizing that the terminal of the wiring board 3 and the relay main body 1 are in a power-off state while the lower cover 6 slides upwards to the surface of the upper cover 5, and the wiring protection module 13 is respectively electrically connected with the relay main body 1 and the wiring board 3; the L-shaped supporting plate 11 penetrates through the upper cover 5 to be connected with the wiring protection module 13, and a moving groove 14 is formed in the part, penetrating through the upper cover 5, of the L-shaped supporting plate 11; the end part of the upper end of the U-shaped sliding chute 7 is also provided with two groups of protection plates 15, the protection plates 15 are symmetrically arranged relative to the rear cover 4, the protection plates 15 are provided with protection grooves for inserting the sliding plates 9, and the inner walls of the protection grooves are respectively provided with heteropolar magnets corresponding to the inserting ends of the sliding plates 9. When the device works, in the installation process, the upper cover 5 forms a gap with the relay main body 1 through the arranged support 12 to play roles of fixing the limit relay main body 1 and increasing the heat dissipation effect of the relay main body 1, meanwhile, the wiring protection module 13 is convenient to be arranged in the support 12, the wiring protection module 13 is respectively electrically connected with the relay main body 1 and the wiring board 3, when the lower cover 6 slides up to the surface of the upper cover 5, the upper cover 6 can not fall down to interrupt the wiring operation process when the lower cover 6 is pushed to the surface of the upper cover 5 by matching with the adsorption effect of heteropolar magnets respectively arranged on the insertion ends of the corresponding sliding plates 9 in the protection grooves of the protection plates 15, and the L-shaped supporting plate 11 plays a supporting and limiting role on the lower cover 6, namely, the terminal of the wiring board 3 in the whole wiring process can be absolutely ensured to be in a power-off state at the moment, and the stability of the, so as to ensure that professional or non-professional wiring personnel can safely connect the power.

As shown in fig. 5, the wiring protection module 13 includes a reset button 131, a sliding rod 132, and two connecting electrode plates 133; the reset button 131 is slidably disposed in a through hole 134 formed in the upper portion of the upper cover 5, and the reset button 131 is used for driving the sliding rod 132 to move so as to disconnect the electrical connection state between the two electrode connecting pieces 133; the connecting electrode piece 133 is used to electrically connect the wiring board 3 and the relay main body 1. When the relay connector works, along with the upward sliding of the lower cover 6, the lower cover 6 is gradually attached to the surface of the upper cover 5, the reset button 131 is extruded by the lower cover 6 to drive the sliding rod 132 to move so as to break the electric connection state between the two connecting electrode plates 133, so that after the lower cover 6 is manually opened, the terminal of the wiring board 3 and the relay main body 1 are in a power-off state, the power of a terminal wiring position is cut off when a worker manually performs wiring, and the wiring safety is guaranteed; and after wiring is accomplished, only through pulling down lower cover 6 with the hand, just can realize reaching the state of being connected with the electricity between terminal of wiring board 3 and the relay main part 1, avoid forgetting to put down lower cover 6 because of the staff, lead to wiring board 3 after the wiring to expose and receive the erosion of dust and steam in the air, influence the use of relay to effectively improved the protective effect to wiring board 3, improved the safety in utilization of relay.

As shown in fig. 5, the reset button 131 is composed of a first spring 135, a cylindrical button 136 with an inclined surface at one end, and a stop ring 137; the columnar button 136 sequentially penetrates through the first spring 135 and the baffle ring 137; one end of the first spring 135 close to the inclined plane is fixedly connected to the columnar button 136, and the other end of the first spring 135 is fixedly connected to the retaining ring 137; the baffle ring 137 is fixedly connected to a port of the through hole 134 close to the outside; the column button 136 is used for driving the sliding rod 132 to move up and down;

the slide bar 132 runs through sliding connection on support 12, the upper end of a second spring 138 sleeved on the slide bar 132 is fixedly connected on the slide bar 132, the lower end of the second spring 138 is fixedly connected on the upper surface of support 12, a V-shaped groove 139 is arranged on the slide bar 132 corresponding to the inclined plane of the columnar button 136, the slide bar 132 passes through the lower part of support 12 and is connected with one end of the L-shaped supporting plate 11, the slide bar 132 is electrically connected with the body through a connecting electrode plate 133 connected on the lower end face, and an insulator is arranged between the slide bar 132 and the connecting electrode plate 133. During operation, the structures of the reset button 131, the sliding rod 132 and the connecting electrode plate 133 and the connection mode of the reset button, the sliding rod and the connecting electrode plate 133 are easily assembled in the prior art, and when the upper cover 5 is disassembled, the connection stability of the internal connection structure can be ensured, scattering is avoided, and the maintenance efficiency is effectively improved; when the lower cover 6 is manually opened, the reset button 131 is pressed by the sliding plate 9 on the lower cover 6 in the process of sliding along the U-shaped sliding groove 7 and inserting into the protective plate 15, the inclined plane of the columnar button 136 is matched with the V-shaped groove 139 on the sliding rod 132 to realize the up-and-down lifting of the sliding rod 132, the bottom connecting electrode piece 134 is driven to be separated from the connecting electrode piece 134 at the upper end of the wiring board 3, the L-shaped supporting plate 11 is automatically lifted to support and limit the lower cover 6, the lower cover 6 is stably stopped on the surface of the upper cover 5, the stability of power loss of the terminal of the wiring board 3 is ensured, and the wiring safety is improved; when the lower cover 6 needs to be closed, the L-shaped supporting plate 11 automatically descends to leave a moving path of the lower cover 6 while the lower cover 6 is pulled out, so that the fluency of the lower cover 6 in the process of returning to the original position is ensured, the lower cover 6 is convenient to close and protect the wiring terminal, and the service life of the lower cover 6 is prolonged.

As shown in fig. 6 and 7, the connecting electrode sheet 133 is provided with a connecting post 16, a rubber protrusion 17 and a slot 18; the rubber bulge 17 wraps the electric connecting column 16 vertically connected to the electric connecting pole piece 133; the slot 18 is arranged at a distance from the electric connecting column 16; the electric connecting columns 16, the rubber bulges 17 and the slots 18 on the two electric connecting pole pieces 133 are arranged in a staggered mode, and the slot 18 on one electric connecting pole piece 133 is arranged corresponding to the electric connecting column 16 on the other electric connecting pole piece 133. The inserting grooves 18 and the electric connecting poles 16 which are connected in a matched mode are arranged on the two electric connecting pole pieces 133, so that electric arcs are effectively prevented from being generated between the two electric connecting pole pieces 133 due to dislocation friction generated when the two electric connecting pole pieces 133 are contacted, and the safety of the two electric connecting pole pieces 133 at the moment of power failure is further improved; meanwhile, the rubber bulge 17 is used for wrapping the electric connecting column 16, so that the stability of the electric connecting column 16 entering the slot 18 is enhanced, the breakage and damage of the electric connecting column 16 are effectively avoided, the service life of the electric connecting column 16 is prolonged, even if electric arcs are generated between the two connecting electrode pieces 133, the electric arcs can be quickly absorbed through the rubber bulge 17 to be eliminated, and the safety of the two connecting electrode pieces 133 at the moment of power failure is further improved.

The specific working mode is as follows:

when the relay protection device works, the relay main body 1 is installed in a coating mode through the rear cover 4, the upper cover 4 and the lower cover 6, so that the relay main body 1 and the wiring board 3 are fully protected, and the relay main body and the wiring board 3 are prevented from being exposed in the air and easily infected with dust and water vapor to cause danger in the use process of the relay; wherein, the U-shaped spout 7 that sets up on the sliding plate 9 cooperation back lid 4 that lower cover 6 set up through both sides for lower cover 6 can slide from top to bottom relatively upper cover 5, exposes wiring board 3 with the realization is opened lower cover 6, and when the staff of being convenient for carries out the wiring or trades the line operation, is convenient for again play good protection effect in the terminal use of being convenient for, and concrete operation is as follows:

(1) when the relay is connected or replaced, the locking rod 81 is pulled out by pulling the pull ring, the clamping rod 85 is clamped in the clamping groove, the locking rod 81 moves into the circular hole from the second clamping hole, the first limiting plate 82 is attached to the inner side wall of the cavity, at the moment, the locking rod 81 relieves the limitation on the sliding plate 9, a worker can conveniently open the lower cover 6 for overhauling quickly, the timeliness of accident treatment is improved, and the probability of danger is reduced;

(2) then, the sliding plate 9 slides upwards along the U-shaped sliding groove 7 under the matching action of the upper rotating shaft 94 and the lower rotating shaft 95 to slide to the position of the transverse groove at the upper end part of the U-shaped sliding groove 7, at the moment, the inner surface of the lower cover 6 is attached to the outer surface of the upper cover 5, and the lower rotating shaft 95 is limited by the transverse groove at the upper end part of the U-shaped sliding groove 7, so that the sliding plate 9 is stably placed above a wiring board, hands occupied by supporting the lower cover 6 in the wiring process of workers are released, and the wiring operation of the relays by the workers is facilitated, and the wiring efficiency and stability are improved; because the lower cover 6 and the sliding plate 9 are usually plastic pieces, and the upper rotating shaft 94 and the lower rotating shaft 95 rotate, the friction force of the sliding plate 9 in the U-shaped sliding chute 7 is effectively reduced, so that the sliding fluency of the sliding plate 9 is improved, the situation that the plastic pieces are broken due to the fact that the plastic pieces are subjected to large friction force for a long time in the moving process is avoided, and the service lives of the lower cover 6 and the sliding plate 9 are effectively prolonged; meanwhile, when the maintenance line changing operation of the relay is carried out at night, the lower cover 6 can be quickly pulled up to a stable placing state, the complex operation of disassembling the shell by workers is omitted, and the maintenance efficiency is improved;

(3) after the wiring, the lower cover 6 is directly pulled along the U-shaped sliding groove 7, the sliding plate 9 on the lower cover 6 is made to return to the plugging module 8, the locking rod 81 is recycled to fix the sliding plate 9, the lower cover 6 can be coated on the wiring board, the wiring board is protected, the ending workload after the wiring of workers is finished is effectively reduced, the wiring efficiency is improved, the protection work of the wiring board is avoided, the use safety of the relay is improved, and the service life is prolonged.

In the description of the present invention, it is to be understood that the terms "center", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be taken as limiting the scope of the present invention.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides an electromagnetic relay, includes relay main part (1), display screen (2) and wiring board (3), and install on relay main part (1) display screen (2), and wiring board (3) are located the below of relay main part (1), its characterized in that: a rear cover (4), an upper cover (5) and a lower cover (6) are arranged on the outer sides of the relay main body (1) and the wiring board (3); the left end and the right end of the rear cover (4) are symmetrically provided with U-shaped sliding chutes (7); a fixed block (8) with a built-in cavity is arranged at the end part of the lower end of the U-shaped chute (7), and an inserting module (8) arranged in the cavity of the fixed block (8) is movably connected with the lower cover (6);

the plug-in module (8) comprises a locking rod (81), a first limiting plate (82), a telescopic spring (83), a second limiting plate (84) and a clamping rod (85); the first limiting plate (82) and the second limiting plate (84) are respectively arranged at two ends of the telescopic spring (83); round holes and rectangular grooves are respectively formed in two sides of the cavity; a clamping groove is formed in the other side of the rectangular groove; one end of the locking rod (81) is fixedly connected with a pull ring, and the other end of the locking rod (81) is inserted into one end, far away from the relay main body (1), of the fixing block (8), sequentially penetrates through the clamping groove, the rectangular groove, the first limiting plate (82), the telescopic spring (83) and the second limiting plate (84) and extends into the round hole; the clamping rod (85) is positioned in the clamping groove and is fixedly connected with the locking rod (81);

sliding plates (9) are arranged on the left side and the right side of the lower cover (6); the sliding plate (9) is provided with a sliding through groove (91) and a linkage shaft (92); the linkage shaft (92) is used for connecting the sliding plate (9) in the U-shaped sliding chute (7) in a sliding manner; the other end of the sliding plate (9) is provided with a first clamping hole (93); a second clamping hole (71) is formed in the transverse groove at the lower end part of the U-shaped sliding groove (7); the first clamping hole (93), the second clamping hole (71) and the round hole are correspondingly arranged for limiting the locking rod (81); the outer side wall is sleeved with an upper rotating shaft (94) and a lower rotating shaft (95), the lower rotating shaft (95) is respectively connected with the U-shaped sliding groove (7) in a sliding mode, and the upper rotating shaft (94) is connected with the sliding holes of the two sliding plates (9) in a sliding mode.

2. An electromagnetic relay according to claim 1, characterized in that: an upper cover (5) is arranged in the upper half area of the front end of the rear cover (4), and a lower cover (6) is movably arranged in the lower half area of the front end of the rear cover (4); a plurality of groups of wiring holes are formed in a straight plate extending from the rear cover (4) to the bottom end of the lower cover (6); the upper cover (5) and the lower cover (6) are both made of transparent plastic materials; the transverse width of the lower cover (6) is greater than that of the upper cover (5); a sealing gasket (10) is arranged on the lower end face of the upper cover (5), and the sealing gasket (10) is in contact sealing with the upper end face of the lower cover (6); the lower part of the front end of the upper cover (5) is provided with a transverse L-shaped supporting plate (11), and the L-shaped supporting plate (11) is used for supporting the lower cover (6) which moves upwards.

3. An electromagnetic relay according to claim 2, characterized in that: a gap is formed between a bracket (12) arranged on the inner side of the upper cover (5) and the relay main body (1), and a wiring protection module (13) is connected in the gap in a sliding manner through the bracket (12); the wiring protection module (13) is used for realizing that the terminal of the wiring board (3) and the relay main body (1) are in a power-off state while the lower cover (6) slides upwards to the surface of the upper cover (5), and the wiring protection module (13) is electrically connected with the relay main body (1) and the wiring board (3) respectively; the L-shaped supporting plate (11) penetrates through the upper cover (5) and is connected with the wiring protection module (13), and a moving groove (14) is formed in the part, penetrating through the upper cover (5), of the L-shaped supporting plate (11); the protection device is characterized in that the end part of the upper end of the U-shaped sliding groove (7) is further provided with two groups of protection plates (15), the protection plates (15) are symmetrically arranged relative to the rear cover (4), the protection plates (15) are provided with protection grooves for inserting the sliding plates (9), and heteropolar magnets are arranged on the inner walls of the protection grooves corresponding to the insertion ends of the sliding plates (9).

4. An electromagnetic relay according to claim 3, characterized in that: the wiring protection module (13) comprises a reset button (131), a sliding rod (132) and two connecting electrode plates (133); the reset button (131) is arranged in a through hole (134) formed in the upper portion of the upper cover (5) in a sliding mode, and the reset button (131) is used for driving the sliding rod (132) to move so as to disconnect the electric connection state between the two electrode connecting pieces (133); the connecting electrode piece (133) is used for electrically connecting the wiring board (3) and the relay main body (1).

5. An electromagnetic relay according to claim 4, characterized in that: the reset button (131) consists of a first spring (135), a columnar button (136) with one end provided with an inclined plane and a stop ring (137); the columnar button (136) penetrates through the first spring (135) and the baffle ring (137) in sequence; one end of the first spring (135) close to the inclined plane is fixedly connected to the columnar button (136), and the other end of the first spring (135) is fixedly connected to the retaining ring (137); the baffle ring (137) is fixedly connected to a port of the through hole (134) close to the outside; the columnar button (136) is used for driving the sliding rod (132) to move up and down;

the sliding rod (132) penetrates through and is connected to the support (12) in a sliding mode, the upper end of a second spring (138) sleeved on the sliding rod (132) is fixedly connected to the sliding rod (132), the lower end of the second spring (138) is fixedly connected to the upper surface of the support (12), a V-shaped groove (139) is formed in the sliding rod (132) and corresponds to a slope of the columnar button (136), the sliding rod (132) penetrates through the lower portion of the support (12) to be connected with one end of the L-shaped supporting plate (11), the sliding rod (132) is electrically connected with the body through a connecting electrode piece (133) connected to the lower end face, and an insulator is arranged between the sliding rod (132) and the connecting electrode piece (133).

6. An electromagnetic relay according to claim 5, characterized in that: the connecting electrode piece (133) is provided with an electric connecting column (16), a rubber bulge (17) and a slot (18); the rubber bulge (17) wraps an electric connecting column (16) vertically connected to the electric connecting pole piece (133); the slot (18) and the electric connecting column (16) are arranged at intervals; the electric connecting columns (16), the rubber bulges (17) and the slots (18) on the two electric connecting pole pieces (133) are arranged in a staggered mode, and the slot (18) on one electric connecting pole piece (133) is arranged corresponding to the electric connecting column (16) on the other electric connecting pole piece (133).