CN211289289U - Lifting closed circuit television system with shaking prevention structure - Google Patents

Abstract

The lifting type closed circuit television system with the shaking prevention structure of the utility model has a structure of winding or unwinding a steel wire rope to a winding drum to lift a closed circuit television camera, and comprises a body which is arranged at a specified height and is provided with the winding drum and a first driving motor for providing a rotating force to the winding drum; a lifting body which is hung on the steel wire rope and is provided with a closed circuit television camera; a receiving structure with an open lower part for combining with the lifting body; a limiting part which is clamped by the clamping part of the lifting body and provides the function of preventing the lifting body from falling; an upper contact part and a lower contact part which are respectively arranged on the body and the lifting body and are contacted with each other under the condition that the lifting body is combined with the body; at least one guide roller arranged on the side and upper part of the winding drum for supporting the wire rope unwound from the winding drum and guiding the wire rope to the inside of the accommodating structure; and a fixing device for applying pressure to any one of the upper contact part and the lifting body in a state that the lifting body is lifted and combined with the main body. The utility model discloses can prevent that the closed circuit television camera from rocking.

Description

Lifting closed circuit television system with shaking prevention structure

Technical Field

The present invention relates to a lift type Closed Circuit Television (CCTV) system, and more particularly, to a lift type closed circuit television system having a structure of winding or unwinding a wire rope to a drum to lift a camera of the closed circuit television.

Background

In general, a cctv camera is mounted on a pillar of a dedicated road or the like for automobiles such as an expressway to collect current data of a traffic jam and various traffic data related to the running of the vehicle or to check the overspeed of the vehicle. Such cctv cameras are fixed in a certain direction to ensure that a particular location can be photographed.

However, since the cctv camera has a characteristic of being installed at a high place, there is a problem that the function is frequently degraded due to external environmental changes such as dust deposition and wind in the case of long-term use. In addition, in the case of maintaining or cleaning the closed circuit television camera, expensive equipment such as a High altitude (High place) aerial ladder car, a ship crane, and the like must be rented, which requires a large amount of maintenance and management costs, and the equipment occupies a lane, which may hinder traffic.

As an alternative, there is disclosed a technique for a lifting type cctv camera in which a lifting device is provided to the cctv camera, and the cctv camera is lowered to the ground as necessary to repair the state of the cctv camera or perform a replacement operation. A related art is disclosed in korean patent laid-open publication No. 10-1193373.

The lifting closed circuit television camera comprises a lifting body, a steel wire rope, a winding drum and a driving motor, wherein the lower part of the lifting body is combined with the closed circuit television camera, the steel wire rope is used for lifting the lifting body, and the winding drum is used for winding the steel wire rope. The lifting type closed circuit television camera has the characteristic that the closed circuit television camera is arranged at a high position, so that the main body is designed to be compact as much as possible.

When the lifting type closed circuit television is set, the lifting body is kept in a fixed state by a specified limiting piece at the lower end of the lifting body. However, in this structure, since a predetermined play space exists in the upper portion of the elevating body in a state where the elevating body is supported by the stopper, the elevating body is liable to shake due to external force such as wind and vibration. Here, the free space is a space that is provided for the upper end of the elevating body to move by the stopper after the upper end engaging table passes through the stopper and then descends by a predetermined distance to be engaged with the stopper.

Under the condition that the lifting body shakes due to wind and the like, the camera can also shake at the same time, so that the function of the closed circuit television can be reduced, and the problem that the camera falls off under the condition of strong wind can also occur.

SUMMERY OF THE UTILITY MODEL

Technical problem

The present invention is directed to solve the above problems, and an object of the present invention is to provide a lift type Closed Circuit Television (CCTV) system having a structure for stably fixing a camera of a closed circuit television so as to prevent the camera and a lift body from shaking due to external forces such as wind in a set state.

Another object of the present invention is to provide a lift type closed circuit television system which simplifies the structure of the driving motor for driving the fixing device for fixing the lift body and can prevent the idling of the motor main body when the driving motor is operated.

Technical scheme

In order to achieve the above object, the present invention provides a lift type closed circuit television system with shaking prevention structure, which is characterized in that it comprises: a body provided at a predetermined height and provided with a drum capable of winding a wire rope and a first driving motor for supplying a rotational force to the drum; a lifting body which is hung on the steel wire rope, and the lower part of the lifting body is provided with a closed circuit television camera; a receiving structure located at a lower portion of the body and having an open lower portion to be combined with the elevating body; the limiting part is arranged on the accommodating structure and clamped by the clamping part arranged on the lifting body so as to provide a function of preventing the lifting body from falling; an upper contact portion and a lower contact portion which are provided in the main body and the lifting body, respectively, and which are in contact with each other when the lifting body is lifted and coupled to the main body by the winding up of the wire rope; at least one guide roller which is arranged on the side and upper part of the winding drum, supports the steel wire rope unwound from the winding drum and guides the steel wire rope to the interior of the containing structure; and a fixing device for pressing the lifting body against the stopper by applying pressure to one of the upper contact portion and the lifting body in a state where the lifting body is coupled to the body by being wound up by the wire, the fixing device including a second driving motor provided inside a tubular housing and a bolt capable of being rotated by the second driving motor and being coupled to a nut to advance and retreat, the lifting body or a portion coupled to the lifting body being pressed when the bolt advances to push the lifting body downward to be coupled to the stopper, an inner wall peripheral surface of the tubular housing having a first surface curved and at least one second surface connected to the first surface and having a flat shape, the second driving motor being provided inside the tubular housing in a longitudinal direction of the tubular housing so as to be capable of advancing integrally with the bolt, And a retreating part having an outer circumferential surface including a first portion bent corresponding to an inner wall circumferential surface of the tubular casing and at least one second portion connected to the first portion and having a flat shape to prevent idling inside the tubular casing at the time of driving.

Preferably, a plurality of the fixing tools are arranged on the side of the body symmetrically with respect to the center of the body and work simultaneously.

Preferably, the fixing means drives the second driving motor by the first power of high power to lower and start the bolt at an instant when the elevating body is fixed, then lowers the bolt by the second power of relatively low power to press the elevating body, drives the second driving motor by the first power of high power to raise and start the bolt at an instant when the elevating body is released from being fixed, and then raises and resets the bolt by the second power of relatively low power.

Technical effects

The utility model discloses a lift type closed circuit television system with prevent rocking structure has following effect.

First, the lifting body is attached to the limiting part through the fixing device under the condition that the closed circuit television camera is lifted, so that the closed circuit television camera can be prevented from shaking, and the potential performance decline or falling hazard of the closed circuit television camera can be reduced.

Second, since the fixing tool prevents the lifting body from shaking, the contact reliability between the upper contact portion and the lower contact portion can be improved.

Third, the driving motor of the driving bolt includes a portion curved corresponding to the circumference of the hollow inner wall of the tube-shaped housing and a flat portion, and thus can be prevented from idling inside the hollow of the tube-shaped housing.

Fourth, since the driving motor for driving the bolt is configured to be integrally lifted and lowered with the bolt in the hollow interior of the tubular housing, a complicated transmission device can be omitted to simplify the apparatus.

Drawings

The following attached drawings illustrate the preferred embodiments of the present invention, and together with the detailed description of the following invention, serve to help understand the technical idea of the present invention, and therefore, the present invention should not be limited to these drawings for explanation.

Fig. 1 is a side view showing the constitution of a lifting type closed circuit television system of a preferred embodiment of the present invention;

fig. 2 is a side view showing a state where the bolt in fig. 1 is retracted and restored;

fig. 3 is a side view showing a state where the elevating body in fig. 2 is lowered;

fig. 4 is a side view showing the constitution of a lifting type closed circuit television system according to another embodiment of the present invention;

fig. 5 is a side view showing a state where the bolt in fig. 4 is retracted and reset;

fig. 6 is a side view showing a state where the elevating body in fig. 5 is lowered;

fig. 7 is a perspective view schematically showing a structure of a tube-shaped housing and a second driving motor of the present invention;

FIG. 8 is an incorporated perspective view of FIG. 7;

fig. 9 is a perspective view illustrating a state in which the second driving motor in fig. 8 advances integrally with the bolt.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The sizes of the respective components or specific portions constituting the components in the drawings are expanded or omitted or are shown in brief for convenience of explanation and clarity. The size of each component does not completely reflect the actual size. When it is determined that a detailed description of a related known function or configuration may obscure the gist of the present invention, such a description will be omitted.

In the following description, terms indicating positional relationships such as front, rear, left, right, upper, lower, front, and side surfaces are used, but it is needless to say that the terms indicating such positional relationships may be changed when the reference direction is changed.

Fig. 1 is a side view showing the constitution of a lifting type closed circuit television system according to a preferred embodiment of the present invention.

Referring to fig. 1, the lift type cctv system according to a preferred embodiment of the present invention includes a body 100 provided at a predetermined height and having a winding drum 101 therein, a coupling portion located at a lower portion of the body 100 and having a stopper 106 capable of catching a lifting body 200, the lifting body 200 hung on a wire 1 wound around the winding drum 101 and having a cctv camera 10 mounted at a lower portion thereof, an upper contact portion 109 provided at the body 100, a lower contact portion 202 disposed at an upper portion of the lifting body 200 and contacting the upper contact portion 109 when the lifting body 200 is lifted up and coupled to the body 100 through the coupling portion, a plurality of guide rollers 103 supporting and guiding the wire 1, and a fixture 120 provided at the body 100 and tightly holding the lifting body 200 to the stopper 106.

The body 100 is disposed at a high position of a predetermined height at an upper end of a support structure such as a building ceiling or a street lamp. To provide the body 100, the upper end of the body 100 has a mounting part 111 constituted by, for example, a ring bolt. Alternatively, a designated support bracket (not shown) that can be coupled to a designated H-beam provided at a ceiling of a building or the like may be connected to the body 100.

The body 100 is provided inside with a drum 101 capable of winding the wire 1 and a first driving motor (not shown) coupled to the drum 101 through a designated gear assembly to provide forward and reverse rotational forces. The first driving motor is preferably a gear motor (gear motor). A technical construction for transmitting a rotational force of a first driving motor to a horizontally arranged drum 101 using a gear assembly is described in detail in korean patent application No. 10-2013 and 0072 filed by the present applicant.

The spool 101 is a cylindrical reel that can wind and unwind the wire 1. Although the drawing shows a structure in which the drum 101 is disposed upright, the main body 100 may be provided so as to be rotatable in a lying state in which the hollow portion is substantially opened in the vertical direction with respect to the floor.

The lower portion of the main body 100 has a coupling portion having a hollow receiving structure 105 formed therein in order to mediate the coupling between the main body 100 and the elevating body 200.

The coupling portion is located at a lower portion of the body 100 and serves as a medium for coupling the lifting body 200 to an accurate position of the body 100 when the lifting body 200 is lifted to a predetermined position by winding the wire 1. Specifically, the coupling portion includes a receiving structure 105 having a predetermined shape for guiding the vertically movable body 200 to be aligned with the lower portion of the center of the main body 100, and a stopper 106 for fixing the coupled state of the vertically movable body 200 to the main body 100 by selectively engaging with an engaging portion 201 in the form of an engaging portion formed at the upper end of the vertically movable body 200.

The housing structure 105 has a cylinder shape with an open lower portion and an internal space into and out of which at least an upper portion of the vertically movable body 200 can be inserted and removed. The receiving structure 105 may be formed integrally with the body 100, or alternatively, may be formed as a separate component from the body 100 and detachably coupled to the lower portion of the body 100.

The stopper 106 is provided to be accessible to ensure that it can selectively protrude from the inner wall of the housing structure 105 to fix the position of the elevating body 200 caught on the housing structure 105. A pair of stoppers 106 may be provided so as to face each other with reference to the center of the housing structure 105, or a plurality of stoppers 106 may be provided at equal intervals in the circumferential direction.

The stopper 106 has a wedge-shaped body inclined below the front end, and is provided to selectively protrude from the inner wall surface of the housing structure 105 by a driving mechanism such as a solenoid.

The lifting body 200 is suspended by the wire 1 and is lifted up and down while being wound up and wound down by the wire 1. The closed circuit television camera 10 is installed at the lower portion of the elevating body 200.

The upper end of the outer circumference of the lifting body 200 is formed with a clamping portion 201 corresponding to the stopper 106. The position of the elevating body 200 is fixed by the position limiting member 106 coupled to the groove portion of the catching portion 201.

The wire 1 unwound from the reel 101 is extended toward the lower portion of the body 100 and connected to the elevating body 200. For this purpose, a plurality of guide rollers 103 for guiding the wire 1 unwound from the spool 101 to the lower portion of the body 100 are disposed around the spool 101.

The fixture 120 functions to apply a force to one of the upper contact portion 109 and the vertically movable body 200 so that the vertically movable body 200 is in close contact with the stopper 106 in a state where the vertically movable body 200 is coupled to the main body 100 by winding up the wire 1. To this end, a metal plate 210 is fixed to the periphery of the elevating body 200, and the fixing tool 120 includes a second driving motor 121 accommodated in the tubular housing 122 and fixed to the main body 100, and a bolt 124 which is rotated by the second driving motor 121 and is coupled to the nut 123 to advance and retract in the vertical direction to be elevated.

The bolt 124 advances (descends) by the forward rotation of the second drive motor 121 and presses the vertically movable body 200 or a portion connected to the vertically movable body 200 at a predetermined point to push the vertically movable body 200 downward to be in close contact with the stopper 106. Fig. 1 shows a structure in which the bolt 124 pushes the vertically movable body 200 in a direction by pressing a metal plate 210 as a portion connected to the vertically movable body 200.

When the bolt 124 is retreated (raised) by the reverse rotation of the second driving motor 121, the bolt 124 is separated from the metal plate 210 and removes the force originally applied to the elevating body 200 to release the fixation.

As a modification of the present invention, the bolt 124 may be configured to move forward and backward in the left-right direction to selectively press the lifting body 200 so that the lifting body 200 is closely attached to the stopper 106. Alternatively, a predetermined wedge structure having an inclined surface formed at a front portion thereof may be used instead of the bolt 124 to push the lifting body 200 to be closely attached to the stopper 106 when advancing.

The fixing means 120 are fixed to the side of the body 100, and it is preferable that a plurality of fixing means 120 are arranged around the side symmetrically with respect to the center of the body 100 while working to uniformly press the elevating body 200 from four directions.

The fixing tool 120 instantaneously drives the second driving motor 121 by the first power of high power to lower the starting bolt 124 when fixing the elevating body 200, and then performs an action of pressing the metal plate 210 by the second power-down bolt 124 of relatively low output. Similarly, when the fixing of the vertically movable body 200 is released, the second driving motor 121 is driven by the first power of high output at the moment to raise the starter bolt 124, and then the second power raising bolt 124 of relatively low power is used to reset the starter bolt 124. Here, it is preferable that the first power is about 2 times the second power. When the first power is set to be higher than the second power, the bolt 124 is instantaneously rotated strongly to move up and down against the friction force with the nut 123 without being caught by the nut 123.

The bolt 124 is connected to a rotation shaft of the second driving motor 121 and is disposed to be vertical with respect to the ground. In order to omit a gear assembly for transmitting a load of a rotational force between the second driving motor 121 and the bolt 124, it is preferable that the second driving motor 121 ascends and descends integrally with the bolt 124 when the fixture 120 operates. Therefore, the nut 123 is fixed to a lower portion of the pipe-shaped casing 122 provided at a side portion of the body 100, the second driving motor 121 and the bolt 124 are disposed inside the pipe-shaped casing 122, and the bolt 124 is coupled to the nut 123 to move forward and backward integrally. In order to prevent the second driving motor 121 from idling inside the tubular casing 122, it is preferable that the outer circumferential surface of the second driving motor 121 is non-circular. Fig. 2 shows an example in which the second drive motor 121 ascends integrally with the bolt 124.

As shown in fig. 7, the tubular outer shell 122 includes an inner peripheral surface having a first surface 122a curved along a periphery of the hollow inner wall and at least one or more second surfaces 122b continuous with the first surface 122a and having a flat shape. Preferably, the second surface 122b of the tubular casing 122 extends in a flat shape to the longitudinal direction of the tubular casing 122 by an amount corresponding to a predetermined section on both sides of the inner wall of the tubular casing 122 facing each other, so that the second driving motor 121 can be more stably supported and housed.

Correspondingly, the second driving motor 121 includes an outer circumferential surface having a first portion 121a curved corresponding to the circumferential surface of the hollow inner wall of the tubular housing 122 and a second portion 121b connected to the first portion 121a and having a flat shape. Preferably, the second portion 121b of the second driving motor 121 is configured to extend in the longitudinal direction flatly by an amount corresponding to a predetermined section on both sides facing each other. The main body of the second driving motor 121 is prevented from idling in the hollow interior of the tubular housing 122 due to the reaction of the motor rotation at the time of driving of the rotation bolt 124.

The second driving motor 121 is provided inside the tubular casing 122 to move forward and backward integrally with the bolt 124 in the longitudinal direction. The second driving motor 121 is inserted into the inner space of the tube-shaped housing 122 as shown in fig. 8, and integrally advances with the bolt 124 along the longitudinal direction of the tube-shaped housing 122 as shown in fig. 9 when the bolt 124 is driven. In the case where the second driving motor 121 is moved while the bolt 124 is lifted and lowered as described above, the coupling structure between the second driving motor 121 and the bolt 124 can be simplified.

Fig. 4 to 6 show an example in which the fixing tool 120 is provided inside the main body 100 to apply a force to the upper contact portion 109 so that the vertically movable body 200 is in close contact with the stopper 106. In the present embodiment, the bolt 124 of the fixing tool 120 presses the upper contact portion 109 to push the vertically movable body 200 downward together with the lower contact portion 202 contacting the lower portion of the upper contact portion 109 so as to be in close contact with the stopper 106. Here, it is preferable that the upper contact portion 109 is provided at the lower end of the main body 100 and elastically moves up and down in a range corresponding to at least G by a predetermined elastic body. That is, the upper contact portion 109 is provided so that the elastic force acts in the direction of returning when pressed by the bolt 124 and moved downward.

The fixture 120 includes a second driving motor 121 accommodated in a tubular housing 122 and fixed to the body 100, and a bolt 124 which is rotated by the second driving motor 121 and is coupled to a nut 123 to advance and retract in the vertical direction and to be lifted and lowered. Alternatively, the bolt 124 may be configured to advance and retract in the left-right direction to selectively press the upper contact portion 109 so that the vertically movable body 200 is brought into close contact with the stopper 106. As another alternative, a prescribed wedge structure having an inclined surface formed at the front portion may be used instead of the bolt 124 to push the upper contact portion 109 when advancing so that the elevating body 200 is closely attached to the stopper 106.

According to the lifting type cctv system of the preferred embodiment of the present invention configured as above, the upper contact portion 109 and the lower contact portion 202 contact each other when the lifting body 200 is lifted and coupled to the body 100 by the winding up of the wire 1, thereby supplying power to the cctv camera 10 mounted to the lifting body 200.

The winding operation of the wire 1 is performed by the drum 101 which is rotated in the forward direction by the first driving motor provided in the main body 100. Here, the wire 1 is pulled up while passing through the hollow of the housing structure 105, and then is turned by the guide roller 103 to be wound around the drum 101.

When the vertically movable body 200 is lifted up to a predetermined position by the winding up of the wire 1, the arrival state is sensed by a predetermined limit switch (not shown), the rotation of the drum 101 is stopped in accordance with the sensing signal, and the engagement portion 201 provided at the upper end of the outer peripheral surface of the vertically movable body 200 is engaged with the stopper 106 protruding from the inner wall of the housing structure 105 of the coupling portion, so that the vertically movable body 200 is fixed to the main body 100.

When the lifting body 200 has reached a predetermined position by being wound up by the wire 1, as shown in fig. 2 or 5, the wire 1 receives a load from the lifting body 200, and the stopper 106 advances at an interval G while the wire 1 is kept in a tensioned state and is engaged with the engaging portion 201.

Thereafter, as shown in fig. 1 or 4, the fixing tool 120 advances the bolt 124 downward to directly/indirectly press the vertically movable body 200 downward to bring the engaging portion 201 of the vertically movable body 200 into close contact with the stopper 106. Therefore, the lifting body 200 can be prevented from shaking, and the potential for performance degradation or falling of the cctv camera 10 can be reduced. Here, the bolt 124 advances downward while being rotated with respect to the nut 123 by the rotational force provided by the second drive motor 121 of the fixture 120, and the second drive motor 121 descends along the longitudinal direction inside the tubular housing 122 integrally with the bolt 124. The second driving motor 121 has an outer circumferential surface including a first portion 121a curved corresponding to a circumferential surface of a hollow inner wall of the tubular housing 122 and a second portion 121b formed flat, thereby preventing the idle rotation in a circumferential direction in the hollow interior of the tubular housing 122.

The lifting body 200 is inserted and fixed into the housing structure 105, and the upper contact portion 109 and the lower contact portion 202 are in contact with each other and are energized. Here, the upper contact portion 109 and the lower contact portion 202 are in contact with each other in the hollow of the housing structure 105.

When the cctv camera 10 is to be cleaned or replaced, first, the bolt 124 of the reset fixture 120 is retracted upward as shown in fig. 2 or 5 to release the force that originally presses the lifting body 200.

After the stopper 106 is retracted to release the locked state of the stopper 106 with respect to the vertically movable body 200, the drum 101 is rotated in the reverse direction to unwind the wire 1 through the hollow of the housing structure 105, and the vertically movable body 200 may be lowered to the ground as shown in fig. 3. To release the jammed state of the stopper 106, the drum 101 may be driven to rotate slightly forward to pull up the elevating body 200 by an amount corresponding to a prescribed interval in small steps. Through this process, the stopper 106 is disengaged from the engaging portion 201 of the lifting body 200 and returned to the original position, and thus the lifting body 200 can be switched to a freely-lowerable state.

According to the above-mentioned the utility model discloses a lift type closed circuit television system, the body 200 that goes up and down is pressed down through bolt 124 of fixing device 120 to the essence after the closed circuit television camera 10 rises and makes joint portion 201 of the body 200 upper end hug closely locating part 106, consequently can prevent that the body 200 that goes up and down from rocking, has the apparent effect that can reduce decline or the tenesmus hidden danger of closed circuit television camera 10 performance.

Although the present invention has been described above with reference to the embodiments and drawings, the present invention is not limited thereto, and those skilled in the art can make various modifications and variations within the scope of the present invention.

Claims (3)

1. A lift type closed circuit television system with shaking prevention structure, comprising:

a body provided at a predetermined height and provided with a drum capable of winding a wire rope and a first driving motor for supplying a rotational force to the drum;

a lifting body which is hung on the steel wire rope, and the lower part of the lifting body is provided with a closed circuit television camera;

a receiving structure located at a lower portion of the body and having an open lower portion to be combined with the elevating body;

the limiting part is arranged on the accommodating structure and clamped by the clamping part arranged on the lifting body so as to provide a function of preventing the lifting body from falling;

an upper contact portion and a lower contact portion which are provided in the main body and the lifting body, respectively, and which are in contact with each other when the lifting body is lifted and coupled to the main body by the winding up of the wire rope;

at least one guide roller which is arranged on the side and upper part of the winding drum, supports the steel wire rope unwound from the winding drum and guides the steel wire rope to the interior of the containing structure; and

a fixing device for applying pressure to either the upper contact portion or the lifting body so that the lifting body is brought into close contact with the stopper in a state where the lifting body is lifted and coupled to the main body by winding up the wire, the fixing device including a second driving motor provided inside a tubular housing and a bolt which is rotatable by the second driving motor and coupled to a nut so as to advance and retreat,

the fixing tool presses the elevating body or a portion connected to the elevating body when the bolt advances to push the elevating body downward so as to be closely attached to the stopper,

the inner wall peripheral surface of the tubular casing has a curved first surface and at least one second surface which is connected with the first surface and has a flat shape,

the second driving motor is provided inside the tubular housing to be capable of moving forward and backward integrally with the bolt in a longitudinal direction of the tubular housing, and has an outer circumferential surface including a first portion curved corresponding to an inner wall circumferential surface of the tubular housing and at least one second portion connected to the first portion and having a flat shape to prevent idling inside the tubular housing during driving.

2. The lift-type closed circuit television system with shaking prevention structure as set forth in claim 1, wherein:

the plurality of fixtures are arranged on the side of the body symmetrically with respect to the center of the body and operate simultaneously.

3. The lift-type closed circuit television system with shaking prevention structure as set forth in claim 2, wherein:

the fixing device drives the second driving motor to descend and start the bolt through the first power with high power at the moment when the lifting body is fixed, and then descends the bolt through the second power with relatively low power to press the lifting body,

when the lifting body is released from being fixed, the second driving motor is driven by the first power with high power instantly to lift and start the bolt, and then the bolt is lifted by the second power with relatively low power so as to reset.

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