阅读说明：本技术 一种自动化智能控制配电设备 (Automatic change intelligent control distribution equipment ) 是由 霍孟蛟 于 2021-08-19 设计创作，主要内容包括：本发明属于配电领域,具体的说是一种自动化智能控制配电设备,包括断电箱,所述断电箱外表面的左侧转动连接有复位转盘,所述复位转盘的右端贯穿断电箱的内壁,所述复位转盘的外表面的右侧与断电箱的内腔转动连接,所述断电箱的上表面固定连接有接线板,所述接线板的下表面通过开口与断电箱的内腔固定连接,所述断电箱内腔的右端固定连接有主线接头。当电路发生短路事故时该装置使用扭切的方法切断电路,产生电弧与电火花极小,并且产生的操作过电压较小,可以作用在转动电机的两侧使转动电机继续进行短暂工作,进而达到消耗操作过电压的目的,从而避免了操作过电压产生的危害,并且无需加装过电压吸收装置,设备量有效减少。(The invention belongs to the field of power distribution, and particularly relates to automatic intelligent control power distribution equipment which comprises a power failure box, wherein the left side of the outer surface of the power failure box is rotatably connected with a reset rotary disc, the right end of the reset rotary disc penetrates through the inner wall of the power failure box, the right side of the outer surface of the reset rotary disc is rotatably connected with an inner cavity of the power failure box, the upper surface of the power failure box is fixedly connected with a wiring board, the lower surface of the wiring board is fixedly connected with the inner cavity of the power failure box through an opening, and the right end of the inner cavity of the power failure box is fixedly connected with a main line connector. When the circuit is in short circuit accident, the device cuts off the circuit by using a twisting method, the generated electric arc and electric spark are extremely small, and the generated operation overvoltage is small, so that the device can act on two sides of the rotating motor to enable the rotating motor to continuously work for a short time, and further the purpose of consuming the operation overvoltage is achieved, thereby avoiding the harm caused by the operation overvoltage, and effectively reducing the equipment amount without additionally arranging an overvoltage absorption device.)

1. The utility model provides an automatic change intelligent control distribution equipment, includes outage case (1), its characterized in that: the left side of outage case (1) surface is rotated and is connected with carousel (2) that resets, the right-hand member of carousel (2) that resets runs through the inner wall of outage case (1), the right side of the surface of carousel (2) that resets rotates with the inner chamber of outage case (1) and is connected, the last fixed surface of outage case (1) is connected with wiring board (3), the lower surface of wiring board (3) passes through the inner chamber fixed connection of opening and outage case (1), the right-hand member fixedly connected with thread joint (4) of outage case (1) inner chamber.

2. An automated intelligent control power distribution apparatus according to claim 1, wherein: the power-off box (1) comprises a box body (11), a circuit board (12) is fixedly connected to the top end of the inner wall of the box body (11), the upper portion of the inner cavity of the circuit board (12) is fixedly connected with the lower surface of a wiring board (3) through a groove, an air vent (13) is formed in the back portion of the inner wall of the box body (11), the air vent (13) penetrates through the outer surface of the box body (11), a reset pointer (15) is fixedly connected to the right side of the outer surface of a reset rotary disc (2), a switching module (5) is fixedly connected to the right end of the reset rotary disc (2), a conductive rod (14) is slidably connected to the left side of the outer surface of the switching module (5), the top end of the conductive rod (14) is fixedly connected with the inner cavity of the circuit board (12), a switching cylinder (16) is rotatably connected to the right side of the switching module (5), and a pulley (16) is rotatably connected to the inner wall of the switching cylinder (16), the inner wall fixedly connected with of pulley (16) rotates motor (17), the inner chamber fixed connection of leading wire and circuit board (12) is passed through on the right side of rotating motor (17) inner chamber, the right-hand member of circuit board (12) inner chamber passes through the left end fixed connection of wire and thread joint (4).

3. An automated intelligent control power distribution apparatus according to claim 2, wherein: the pulley (16) comprises a conductive metal sleeve (61), the inner wall of the conductive metal sleeve (61) is fixedly connected with the bottom end of the rotating motor (17) through a connecting wheel, a rubber key (62) is fixedly connected to the outer surface of the conductive metal sleeve (61), and a guide wheel (63) is rotatably connected to the inner wall of the rubber key (62) through a rotating rod.

4. An automated intelligent control power distribution apparatus according to claim 2, wherein: switching module (5) includes runner (7), the left side of runner (7) surface and the right-hand member sliding connection of conducting rod (14), axle center department fixedly connected with chuck (51) on runner (7) surface right side, the right side fixedly connected with reset ring (8) of chuck (51) surface, the equal fixedly connected with of left end of a switching section of thick bamboo (16) inner chamber electrically conducts telescopic link (9), the right side sliding connection of the left end of electrically conducting telescopic link (9) and runner (7) surface.

5. An automated intelligent control power distribution apparatus according to claim 4, wherein: runner (7) are including insulating wheel (71), annular (72) have been seted up to the upper surface of insulating wheel (71), joint groove (73) have evenly been seted up through annular (72) to the upper surface of insulating wheel (71), through-hole (75) have evenly been seted up through annular (72) to the upper surface of insulating wheel (71), the lower surface of insulating wheel (71) is run through to the bottom of through-hole (75), the inner chamber of insulating wheel (71) passes through-hole (75) fixedly connected with electrically conductive long barrel casing (74), the bottom of electrically conductive long barrel casing (74) and the bottom swing joint of conducting rod (14).

6. An automated intelligent control power distribution apparatus according to claim 4, wherein: the reset ring (8) comprises a fixed ferrule (81), the back of the fixed ferrule (81) is fixedly connected with the outer surface of the adapter cylinder (16), baffles (83) are symmetrically arranged on the inner wall of the fixed ferrule (81), the outer surface of each baffle (83) is fixedly connected with the inner wall of the fixed ferrule (81), a shaft lever (82) is rotatably connected to the axis of the fixed ferrule (81), rotating plates (84) are symmetrically arranged on the outer surface of the shaft lever (82), the inner wall of each rotating plate (84) is fixedly connected with the outer surface of each shaft lever (82), and the upper surface of each rotating plate (84) is movably connected with the upper surface of each baffle (83) through a tension spring belt (85).

7. An automated intelligent control power distribution apparatus according to claim 4, wherein: the telescopic rod (9) comprises a pipe sleeve (92), an expansion spring (91) is fixedly connected to the left side of the inner wall of the pipe sleeve (92), an expansion shaft (93) is fixedly connected to the right end of the expansion spring (91), and a sliding sleeve is sleeved on the right end of the outer surface of the expansion shaft (93).

Technical Field

The invention belongs to the field of power distribution, and particularly relates to automatic intelligent control power distribution equipment.

Background

The power short circuit is one of the most common phenomena in circuit failure, also is a phenomenon that harm is great, the concrete expression form is circuit element short circuit, the electric current grow in the circuit, the circuit heat production increases the temperature and rises, and then burn out the circuit, the accident of starting a fire may even take place when serious, consequently, the relay can all be installed in comparatively complicated circuit now and come the protection circuit, prevent current overload, and general circuit breaker produces the operation overvoltage easily, when breaking inductive current, the current can appear and cut the phenomenon and cause higher overvoltage, consequently, install overvoltage absorbing device additional, but can lead to the inside equipment volume of circuit breaker to increase like this, maintenance cost also can increase, the production technology is complicated.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides automatic intelligent control power distribution equipment, which solves the problems that an ordinary circuit breaker is easy to generate operation overvoltage, and higher overvoltage is caused by the phenomenon of current cutoff when inductive current is cut off.

(II) technical scheme

The technical scheme adopted by the invention for solving the technical problems is as follows: the invention relates to automatic intelligent control power distribution equipment which comprises a power failure box, wherein the left side of the outer surface of the power failure box is rotatably connected with a reset rotary disc, the right end of the reset rotary disc penetrates through the inner wall of the power failure box, the right side of the outer surface of the reset rotary disc is rotatably connected with an inner cavity of the power failure box, the upper surface of the power failure box is fixedly connected with a wiring board, the lower surface of the wiring board is fixedly connected with the inner cavity of the power failure box through an opening, and the right end of the inner cavity of the power failure box is fixedly connected with a main line connector.

The power-off box comprises a box body, the top end of the inner wall of the box body is fixedly connected with a circuit board, the upper part of the inner cavity of the circuit board is fixedly connected with the lower surface of a wiring board through a slot, the back of the inner wall of the box body is provided with a vent hole which penetrates to the outer surface of the box body, the right side of the outer surface of the reset rotary disc is fixedly connected with a reset pointer, the right end of the reset rotary disc is fixedly connected with a switching module, the left side of the outer surface of the switching module is connected with a conductive rod in a sliding way, the top end of the conductive rod is fixedly connected with the inner cavity of the circuit board, the right side of the switching module is rotationally connected with a switching cylinder, the inner wall of the switching cylinder is rotationally connected with a pulley, the inner wall fixedly connected with of pulley rotates the motor, the right side of rotating the motor inner chamber is through leading the inner chamber fixed connection of line and circuit board, the right-hand member of circuit board inner chamber passes through the left end fixed connection of wire and thread joint.

The pulley comprises a conductive metal sleeve, the inner wall of the conductive metal sleeve is fixedly connected with the bottom end of the rotating motor through a connecting wheel, a rubber key is fixedly connected to the outer surface of the conductive metal sleeve, and the inner wall of the rubber key is rotatably connected with a guide wheel through a rotating rod.

The switching module includes the runner, the left side of runner surface and the right-hand member sliding connection of conducting rod, axle center department fixedly connected with chuck on runner surface right side, the right side fixedly connected with reset ring of chuck surface, the electrically conductive telescopic link of the equal fixedly connected with in left end of a switching section of thick bamboo inner chamber, the left end of electrically conductive telescopic link and the right side sliding connection of runner surface.

The runner includes the insulating wheel, the annular has been seted up to the upper surface of insulating wheel, the joint groove has evenly been seted up through the annular to the upper surface of insulating wheel, the through-hole has evenly been seted up through the annular to the upper surface of insulating wheel, the lower surface of insulating wheel is run through to the bottom of through-hole, the electrically conductive long barrel casing of through-hole fixedly connected with is passed through to the inner chamber of insulating wheel, the bottom of electrically conductive long barrel casing and the bottom swing joint of conducting rod.

The reset ring comprises a fixed ferrule, the back of the fixed ferrule is fixedly connected with the outer surface of the adapter sleeve, baffles are symmetrically arranged on the inner wall of the fixed ferrule, the outer surface of each baffle is fixedly connected with the inner wall of the fixed ferrule, a shaft rod is rotatably connected to the axis of the fixed ferrule, rotating plates are symmetrically arranged on the outer surface of the shaft rod, the inner wall of each rotating plate is fixedly connected with the outer surface of the shaft rod, and the upper surface of each rotating plate is movably connected with the upper surface of each baffle through a tension spring band.

The telescopic rod comprises a pipe sleeve, a telescopic spring is fixedly connected to the left side of the inner wall of the pipe sleeve, a telescopic shaft is fixedly connected to the right end of the telescopic spring, and a sliding sleeve is sleeved on the right end of the outer surface of the telescopic shaft.

The invention has the following beneficial effects:

1. after the device is connected into a main circuit, when a short circuit accident occurs to the circuit, the current in the circuit is increased, the current passing through a rotating motor is also increased at the moment, the current in the circuit is increased because the rotating motor is connected in series in the circuit, so that the rotating motor is started, the rotating motor rotates a switching barrel through a pulley, a switching module cuts off the circuit inside a power-off box, and further the effect of protecting the circuit is achieved, different from the principle of a common air circuit breaker, the device cuts off the circuit by using a twisting and cutting method, electric arcs and electric sparks are not generated at the moment of cutting off the circuit, the generated operation overvoltage is smaller, the rotating motor can continue to work for a short time by acting on two sides of the rotating motor, and the purpose of consuming the operation overvoltage is achieved, so that the harm caused by the operation overvoltage is avoided, an overvoltage absorption device is not required to be additionally arranged, and the equipment amount is effectively reduced, the amount of maintenance is also reduced.

2. When the rotating motor works, the rotating shaft end of the rotating motor drives the adapter cylinder to rotate through the conductive metal sleeve, the telescopic rod on the left side of the adapter cylinder slides clockwise along the annular groove, at the moment, the telescopic shaft of the telescopic rod contracts inwards along the pipe sleeve, the telescopic rod is shortened, the telescopic rod is in contact with and separated from the conductive long cylinder sleeve, the inside of the device starts to be powered off, the telescopic rod is in a stretching state due to the fact that the telescopic rod is in clamping connection with the through hole, the pull spring belt is in a stretching state when the shaft rod rotates, the speed of the telescopic rod separating from the conductive long cylinder sleeve is higher, the power-off reaction capacity of the device is higher, compared with a bouncing type short circuit of a relatively violent air switch, the short circuit reaction of the device is relatively mild, the generated impact force is extremely small, the damage to the internal device is also small, and the service life and the stability of the device are improved; when the telescopic link slided to the inner chamber in joint groove, the telescopic shaft of telescopic link extends along the pipe box under expanding spring's effect, the insulating wheel passes through joint groove and telescopic link joint, tension spring area is in compression state this moment, the prevention rotates the motor and continues to rotate, the effect of buffering has been played, the device is static, be in the state of opening circuit completely, because there is the blockking of insulating wheel, the telescopic link breaks away from the electric arc spark of electrically conductive long barrel casing in the twinkling of an eye, can not produce similar air switch hardly, the back that the adjustment circuit finishes, the user rotates the carousel that resets, the pointer that resets rotates back, the telescopic link meets with electrically conductive long barrel casing again, the device is in the access state and continues work.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the power disconnect box of the present invention;

FIG. 3 is a schematic view of the construction of the pulley of the present invention;

FIG. 4 is a schematic structural diagram of the adapter module according to the present invention;

FIG. 5 is a schematic view of the construction of the wheel of the present invention;

fig. 6 is a schematic illustration of the reset ring of the present invention;

FIG. 7 is a schematic view of the telescopic rod of the present invention.

In the figure: the power failure box 1, the reset rotary table 2, the wiring board 3, the main line connector 4, the box body 11, the circuit board 12, the vent hole 13, the conductive rod 14, the reset pointer 15, the adapter cylinder 16, the rotating motor 17, the pulley 6, the conductive metal sleeve 61, the rubber key 62, the guide wheel 63, the adapter module 5, the chuck 51, the rotating wheel 7, the insulating wheel 71, the annular groove 72, the clamping groove 73, the conductive long cylinder sleeve 74, the through hole 75, the reset ring 8, the fixing ferrule 81, the shaft lever 82, the baffle 83, the rotating plate 84, the tension spring belt 85, the telescopic rod 9, the telescopic spring 91, the pipe sleeve 92 and the telescopic shaft 93.

Detailed Description

An automated intelligent control power distribution apparatus according to an embodiment of the present invention will be described below with reference to fig. 1 to 7.

As shown in fig. 1-7, the automatic intelligent control power distribution equipment comprises a power failure box 1, wherein a reset rotary table 2 is rotatably connected to the left side of the outer surface of the power failure box 1, the right end of the reset rotary table 2 penetrates through the inner wall of the power failure box 1, the right side of the outer surface of the reset rotary table 2 is rotatably connected with an inner cavity of the power failure box 1, a wiring board 3 is fixedly connected to the upper surface of the power failure box 1, the lower surface of the wiring board 3 is fixedly connected with the inner cavity of the power failure box 1 through an opening, and a main line connector 4 is fixedly connected to the right end of the inner cavity of the power failure box 1.

The power-off box 1 comprises a box body 11, a circuit board 12 is fixedly connected to the top end of the inner wall of the box body 11, the upper part of the inner cavity of the circuit board 12 is fixedly connected with the lower surface of a wiring board 3 through a groove, an air vent 13 is arranged on the back of the inner wall of the box body 11, the air vent 13 penetrates through the outer surface of the box body 11, a reset pointer 15 is fixedly connected to the right side of the outer surface of a reset rotary disc 2, a switching module 5 is fixedly connected to the right end of the reset rotary disc 2, a conducting rod 14 is slidably connected to the left side of the outer surface of the switching module 5, the top end of the conducting rod 14 is fixedly connected with the inner cavity of the circuit board 12, a switching cylinder 16 is rotatably connected to the right side of the switching module 5, a pulley 16 is rotatably connected to the inner wall of the switching cylinder 16, a rotating motor 17 is fixedly connected to the inner wall of the pulley 16, and the right side of the inner cavity of the rotating motor 17 is fixedly connected with the inner cavity of the circuit board 12 through a main conductor, the right end of the inner cavity of the circuit board 12 is fixedly connected with the left end of the main line connector 4 through a lead, after the device is connected into a main circuit, when a short circuit accident happens to the circuit, the current in the circuit is increased, at the moment, the current passing through the rotating motor 17 is also increased, because the rotating motor 17 is connected in series in the circuit, the current in the circuit is increased, so that the rotating motor 17 is started, the rotating motor 17 rotates the switching cylinder 16 through the pulley 6, the switching module 5 cuts off the circuit inside the power-off box 1, and further plays a role in circuit-breaking protection, and the device cuts off the circuit by using a twist-cut method, does not generate electric arcs and electric sparks at the moment of circuit-breaking, generates small operation overvoltage, can act on two sides of the rotating motor 17 to enable the rotating motor 17 to continue to work for a short time, and further achieves the purpose of consuming operation overvoltage, therefore, the damage caused by operation overvoltage is avoided, an overvoltage absorption device is not required to be additionally arranged, the equipment amount is effectively reduced, and the maintenance amount is also reduced.

The pulley 16 comprises a conductive metal sleeve 61, the inner wall of the conductive metal sleeve 61 is fixedly connected with the bottom end of the rotating motor 17 through a connecting wheel, a rubber key 62 is fixedly connected to the outer surface of the conductive metal sleeve 61, and the inner wall of the rubber key 62 is rotatably connected with a guide wheel 63 through a rotating rod.

Switching module 5 includes runner 7, the left side of runner 7 surface and the right-hand member sliding connection of conducting rod 14, the axle center department fixedly connected with chuck 51 on runner 7 surface right side, the right side fixedly connected with reset ring 8 of chuck 51 surface, the equal fixedly connected with of the left end of 16 inner chambers of switching section of thick bamboo electrically conducts telescopic link 9, the left end of electrically conductive telescopic link 9 and the right side sliding connection of runner 7 surface.

Runner 7 includes insulating wheel 71, annular 72 has been seted up to the upper surface of insulating wheel 71, joint groove 73 has evenly been seted up through annular 72 to the upper surface of insulating wheel 71, through-hole 75 has evenly been seted up through annular 72 to the upper surface of insulating wheel 71, the lower surface of insulating wheel 71 is run through to the bottom of through-hole 75, the inner chamber of insulating wheel 71 passes through the electrically conductive long barrel casing 74 of through-hole 75 fixedly connected with, the bottom of electrically conductive long barrel casing 74 and the bottom swing joint of conducting rod 14.

The reset ring 8 comprises a fixed ferrule 81, the back of the fixed ferrule 81 is fixedly connected with the outer surface of the adapter cylinder 16, baffles 83 are symmetrically arranged on the inner wall of the fixed ferrule 81, the outer surface of each baffle 83 is fixedly connected with the inner wall of the fixed ferrule 81, a shaft rod 82 is rotatably connected to the axis of the fixed ferrule 81, rotating plates 84 are symmetrically arranged on the outer surfaces of the shaft rods 82, the inner walls of the rotating plates 84 are fixedly connected with the outer surfaces of the shaft rods 82, and the upper surfaces of the rotating plates 84 are movably connected with the upper surfaces of the baffles 83 through tension spring belts 85.

The telescopic rod 9 comprises a pipe sleeve 92, a telescopic spring 91 is fixedly connected to the left side of the inner wall of the pipe sleeve 92, a telescopic shaft 93 is fixedly connected to the right end of the telescopic spring 91, a sliding sleeve is sleeved on the right end of the outer surface of the telescopic shaft 93, when the rotating motor 17 works, the rotating shaft end of the rotating motor 17 drives the adapter cylinder 16 to rotate through the conductive metal sleeve 61, the telescopic rod 9 on the left side of the adapter cylinder 16 slides clockwise along the annular groove 72, at the moment, the telescopic shaft 93 of the telescopic rod 9 contracts inwards along the pipe sleeve 92, the telescopic rod 9 is shortened, the telescopic rod 9 is separated from the conductive long cylinder sleeve 74 in a contact manner, the power failure inside the device starts to occur, as the telescopic rod 9 is separated from the through hole 75 in a clamping manner, the tension spring belt 85 is in a stretching state when the shaft rod 82 rotates, the shaft rod 82 is driven to rotate with higher speed, the telescopic rod 9 is separated from the conductive long cylinder sleeve 74, and the power failure response capability of the device is higher, compared with a relatively violent bouncing type short circuit of the air switch, the short circuit of the device has relatively mild reaction, extremely small generated impact force and little damage to an internal device, and the service life and the stability of the device are improved by phase change; when the telescopic rod 9 slides to the inner cavity of the clamping groove 73, the telescopic shaft 93 of the telescopic rod 9 extends along the pipe sleeve 92 under the action of the telescopic spring 91, the insulating wheel 71 is clamped with the telescopic rod 9 through the clamping groove 73, at the moment, the tension spring belt 85 is in a compression state, the rotation of the motor 17 is prevented from continuing, a buffering effect is achieved, the device is static and in a complete circuit-breaking state, due to the fact that the insulating wheel 71 blocks, at the moment that the telescopic rod 9 is separated from the conductive long barrel sleeve 74, electric arc sparks similar to an air switch can hardly be generated, after the circuit adjustment is completed, a user rotates the reset turntable 2, after the reset pointer 15 rotates 180 degrees, the telescopic rod 9 is connected with the conductive long barrel sleeve 74 again, and the device continues to work in a circuit-on state.

The specific working process is as follows:

after the device is connected into a main circuit, when a short circuit accident occurs to the circuit, the current in the circuit is increased, the current passing through the rotating motor 17 is also increased at the moment, because the rotating motor 17 is connected in series in the circuit, the current in the circuit is increased, so that the rotating motor 17 is started, the rotating motor 17 rotates the switching cylinder 16 through the pulley 6, the switching module 5 cuts off the circuit inside the power-off box 1, and further the effect of circuit-breaking protection is achieved, different from the principle of a common air circuit breaker, the device cuts off the circuit by using a twisting method, electric arcs and electric sparks are not generated at the moment of circuit-breaking, the generated operation overvoltage is smaller, the device can act on two sides of the rotating motor 17 to enable the rotating motor 17 to continue to work for a short time, the purpose of consuming the operation overvoltage is achieved, the harm caused by the operation overvoltage is avoided, and an overvoltage absorption device is not required to be additionally arranged, the equipment amount is effectively reduced, and the maintenance amount is also reduced.

When the rotating motor 17 works, the rotating shaft end of the rotating motor 17 drives the adapter cylinder 16 to rotate through the conductive metal sleeve 61, the telescopic rod 9 on the left side of the adapter cylinder 16 slides clockwise along the annular groove 72, at the moment, the telescopic shaft 93 of the telescopic rod 9 contracts inwards along the pipe sleeve 92, the telescopic rod 9 is shortened, the telescopic rod 9 is separated from the conductive long cylinder sleeve 74 in a contact way, the inside of the device is powered off, because the telescopic rod 9 is separated from the through hole 75 in a clamping way, the tension spring belt 85 is in a stretching state when the shaft lever 82 rotates to drive the shaft lever 82 to rotate at an accelerated speed, the speed of separating the telescopic rod 9 from the conductive long cylinder sleeve 74 is faster, the power-off reaction capability of the device is also faster, compared with the relatively violent bouncing type short circuit of an air switch, the short circuit reaction of the device is relatively mild, the generated impact force is extremely small, the damage to the internal device is also extremely small, and the service life and the stability of the device are improved through phase change; when the telescopic rod 9 slides to the inner cavity of the clamping groove 73, the telescopic shaft 93 of the telescopic rod 9 extends along the pipe sleeve 92 under the action of the telescopic spring 91, the insulating wheel 71 is clamped with the telescopic rod 9 through the clamping groove 73, at the moment, the tension spring belt 85 is in a compression state, the rotation of the motor 17 is prevented from continuing, a buffering effect is achieved, the device is static and in a complete circuit-breaking state, due to the fact that the insulating wheel 71 blocks, at the moment that the telescopic rod 9 is separated from the conductive long barrel sleeve 74, electric arc sparks similar to an air switch can hardly be generated, after the circuit adjustment is completed, a user rotates the reset turntable 2, after the reset pointer 15 rotates 180 degrees, the telescopic rod 9 is connected with the conductive long barrel sleeve 74 again, and the device continues to work in a circuit-on state.

While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.