KR20170090061A - Self-locking device of emergency door 24V DC input type having an improved current supply stucture - Google Patents

Self-locking device of emergency door 24V DC input type having an improved current supply stucture Download PDF

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Publication number
KR20170090061A
KR20170090061A KR1020160010438A KR20160010438A KR20170090061A KR 20170090061 A KR20170090061 A KR 20170090061A KR 1020160010438 A KR1020160010438 A KR 1020160010438A KR 20160010438 A KR20160010438 A KR 20160010438A KR 20170090061 A KR20170090061 A KR 20170090061A
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South Korea
Prior art keywords
unit
starting current
current
control module
emergency
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KR1020160010438A
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Korean (ko)
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KR101776119B1 (en
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김광태
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(주) 금강씨에스
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    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B65/00—Locks or fastenings for special use
    • E05B65/10—Locks or fastenings for special use for panic or emergency doors
    • E05B65/108—Electronically controlled emergency exits
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B47/0001—Operating or controlling locks or other fastening devices by electric or magnetic means with electric actuators; Constructional features thereof
    • H02J7/0052—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0048—Circuits, feeding, monitoring
    • E05B2047/005—Opening, closing of the circuit
    • E05B2047/0054—Opening, closing of the circuit using microprocessor, printed circuits, or the like
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0083—Devices of electrically driving keys, e.g. to facilitate opening
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
    • E05B47/00—Operating or controlling locks or other fastening devices by electric or magnetic means
    • E05B2047/0084—Key or electric means; Emergency release
    • E05B2047/0086—Emergency release, e.g. key or electromagnet
    • E05B2047/0087—Electric spare devices, e.g. auxiliary batteries or capacitors for back up

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Lock And Its Accessories (AREA)

Abstract

The present invention relates to an automatic emergency door locking device of a DC 24V input type with an improved current supply structure, and more particularly, to an automatic emergency door locking device of a DC 24V input type with an improved current supply structure, capable of closing a rooftop emergency door by restricting a rooftop entrance and exit door of a building through a magnetic force in ordinary times and securing an entrance and exit path by opening the corresponding rooftop emergency door by releasing the restriction of the rooftop entrance and exit door in an emergency situation like the occurrence of a fire, etc., and particularly, performing a starting operation through a dropped DC 12V voltage by dropping the DC 12V voltage by receiving a firefighting current of DC 24V. The automatic emergency door locking device according to the present invention includes a magnetic shutter which locks the emergency door and a control terminal which includes a control module and a power module to supply a start current.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an emergency door automatic lock device having a DC 24 V input type having an improved current supply structure,

[0001] The present invention relates to an emergency door automatic locking device of the DC 24 V input type having an improved electric current supply structure, more specifically, , The rooftop exit door is released and the corresponding rooftop exit is opened to secure the entry and exit path. In particular, when the DC 12V starting current is generated by receiving the DC 24V fire prevention current, DC 24 V input type emergency door automatic locking device having a current supply structure.

Buildings are provided for emergency situations such as fire and gas leaks, and emergency exits are provided for emergency evacuation. With the recent increase in the use of radiators, the risk of fire has risen and the balcony expansion has been legalized, structural changes have soared, The importance is growing.

Among them, the majority of apartment rooftop doors that are used as an evacuation space for emergencies are closed, which is a concern for large-scale casualties.

According to the current Fire Service Act, emergency floors that can be escaped in case of fire are opened on the 5th or higher floors, and the Emergency Gate is open at all times when a square is installed on the roof of the Building Act.

However, in most apartments, the risk of being abused as a derailment place, such as bond and gas sucking and snoozing, is high at the time of opening the roof, and it is suggested to lock the roof door or fill it with locks and access it because of the high risk of safety accidents such as suicide or falling It is true.

Accordingly, a need has arisen for an apartment management office to open a roof door opening / closing device capable of remote control, and an automatic opening facility connected to a fire detection sensor, so as to eliminate evacuation space and inconvenience to residents.

Accordingly, in recent years, there has been provided an emergency door automatic locking device which can remotely block the above-mentioned roof exit so that the emergency exit can be locked and controlled. In case of a fire, It is used as an emergency evacuation route.

The emergency door automatic locking device includes a magnetic closure device for locking the emergency door by magnetic force to lock the emergency exit door; And a control terminal including a control module for supplying a starting current to the magnetic closure device to control locking and restraining of the emergency door, and a power supply module for supplying a starting current, and is configured to lock and lock the emergency door through magnetic coupling force.

However, since the power module of the emergency door automatic locking device is configured to be driven by receiving the AC 220V current, considering the safety of electric power, the electric power module of the automatic emergency lock device is operated by the high voltage current, High probability of occurrence.

Further, since the current is always supplied to the self-closing device at the reference pulse cycle at all times, there is a problem that the current consumption is increased, and when the supply of the commercial current is interrupted, the locking and restraining of the emergency door may be released.

An object of the present invention, which is devised to solve the above-described problems, is to provide a DC 12 V starting current by receiving a DC 24 V fire protection current and operating the DC 12 V starting current to secure electrical safety,

A DC 24 V input type emergency door automatic lock device having an improved current supply structure in which the pulse period of the DC 12 V starting current is organically converted according to the situation and the current consumption due to the self restraint of the emergency door is reduced is provided.

The above object is achieved by the following constitutions provided in the present invention.

An emergency door automatic locking device of the DC 24V input type having an improved current supply structure according to the present invention,

A magnetic closure for locking the emergency gate by magnetic force to lock the emergency exit; And a control terminal including a control module for supplying a starting current to the magnetic closing device to control locking and restraining of an emergency door, and a power supply module for supplying a starting current,

The power module includes an input unit to which a driving power is inputted; A voltage conversion unit for reducing an input current of DC 24V applied through the input unit to DC 12V and a DC 12V starting current reduced through the voltage conversion unit to an auxiliary battery and supplying a DC 24V input current And an auxiliary power unit for supplying the stored DC 12V current to the control module if not supplied,

The driving current of DC 24 V supplied through the input unit is reduced through the voltage converting unit to form a starting current of DC 12 V and the reduced starting current is supplied to the control module and to the self- .

Preferably, the control module further includes a fire signal receiving unit for receiving a fire signal from a situation room or a fire detector, a keypad unit for inputting a password, a start-up current supply unit for controlling supply of a start- Unit,

When the fire signal is input through the fire signal receiving unit or the password set through the keypad is inputted through the fire signal receiving unit, the control module is configured to shut off the starting current supplied to the self-closing device through the starting current supply unit to release the locking restriction of the emergency door .

More preferably, the control module and the power module are housed in an enclosure having an opening and closing door,

The control module is provided with an opening / closing detection unit for detecting opening / closing of the housing by the opening / closing door and a horn for generating an alarm sound. When the housing is opened / closed without inputting the set password through the keypad unit, To generate an alarm sound.

A pulse period converter is added to the starting current supply unit of the control module, and if the driving current DC 12V is not supplied to the input unit, the auxiliary power unit is configured to supply the starting current stored in the auxiliary battery to the control module Meanwhile,

When the starting current stored in the auxiliary power source unit is supplied to the control module, the starting current supplying unit increases the pulse supplying period of the DC 12 V starting current supplied from the auxiliary battery through the pulse period converting unit longer than the reference pulse period, So that the amount of supply of the starting current to be supplied to the power source is reduced.

As described above, the present invention proposes a DC 24V input-type emergency door automatic lock device which is not configured to be driven by a high-voltage commercial AC 220V, and which receives DC 24V, which is a fire-prevention current, If such a configuration is adopted in which the DC 24 V is supplied and the DC 12 V is activated, electrical safety such as electric shock or short circuit can be secured.

According to the present invention, in realizing the emergency door automatic lock device, a pulse period converter is added to the starting current supply unit, and the control module organically adjusts the supply period of the starting current supplied to the magnetic closure .

Therefore, the present invention minimizes the amount of starting current consumed while stably locking the emergency gate according to the situation, and in particular, when the starting current is stored in the emergency power source unit because the driving current is not supplied, The locked state of the emergency door can be maintained constantly through the starting current stored in the unit.

FIG. 1 is a view showing an installation state of an emergency door automatic locking device of DC 24V input type having an improved current supply structure proposed by the preferred embodiment of the present invention,
FIG. 2 is a block diagram schematically showing the overall configuration of a magnetic closing device and a control terminal constituting an emergency door automatic locking device of DC 24V input type having an improved current supply structure proposed in the preferred embodiment of the present invention,
FIGS. 3 and 4 show the supplying state of the starting current through the pulse period conversion in the emergency door automatic locking device of the DC 24 V input type with the improved current supply structure proposed in the preferred embodiment of the present invention .

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an emergency door automatic locking device of DC 24V input type having an improved current supply structure proposed in the preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a view showing an installation state of an emergency door automatic locking device of DC 24V input type having an improved current supply structure proposed by the preferred embodiment of the present invention,

FIG. 2 is a block diagram schematically showing the overall configuration of a magnetic closing device and a control terminal constituting an emergency door automatic locking device of DC 24V input type having an improved current supply structure proposed in the preferred embodiment of the present invention, FIGS. 3 and 4 show the supplying state of the starting current through the pulse period conversion in the emergency door automatic locking device of the DC 24 V input type with the improved current supply structure proposed in the preferred embodiment of the present invention .

As shown in FIG. 1, the emergency door automatic locking device 1 of the DC 24V input type having the improved current supply structure proposed in the preferred embodiment of the present invention is disposed in the emergency exit 200 on the roof or the like, The emergency door 210 for opening and closing the door 200 is normally locked to prevent unauthorized entry and exit of the roof, and when a fire occurs or access authentication is performed by the administrator, the locked emergency door 210 is released, Is a fire-fighting article that allows escape to the roof or access to the roof through the fireplace 200.

As shown in FIGS. 1 and 2, the emergency door automatic locking device 1 includes a magnetic closure device 10 for locking the emergency door 210 by an electromagnetic force to lock the emergency exit door 10; And a control terminal (100) for controlling the start of the magnetic closeer (10).

The magnetic closeer 10 includes a magnetism generating module 11 disposed in a door frame of the emergency exit 200 and a ferromagnetic piece 20 disposed in the emergency door 210 closing the emergency exit, The self-generating module 10 installed in the door frame of the door 200 receives the starting current provided from the control terminal 100 and generates an electromagnetic coupling force.

The emergency door 210 closing the emergency exit 200 is self-restricted by the electromagnetic coupling force emitted from the self-generating module 10 through the ferromagnetic piece 20, so that the emergency exit is lock-locked in a state of closing the emergency exit.

2, the control terminal 100 includes a control module 110 for controlling locking and restraining of the emergency door 210 by supplying a starting current to the magnetic closure device 10; The control module 110 and the power module 120 are accommodated in a housing 130 formed with an opening and closing door 131 and connected to the outer wall of the emergency exit 200. [ .

The control module 110 constituting the control terminal 100 is provided with a fire signal receiving unit 111 for receiving a fire signal from a situation room or a fire detector, a keypad unit 112 for inputting a password, And a starting current supply unit 114 for controlling the supply of the starting current for starting the closing machine 10. [

According to the present embodiment, the control module 110 normally supplies the starting current to the magnetic shut-off device 10 through the starting current supply unit 114, and the emergency door 210, which closes the emergency exit 200, Thereby preventing unauthorized entry and exit through the emergency exit port 200. [0050] FIG.

In this process, when a fire signal is input through the fire signal receiving unit 111 or a password set through the keypad unit 112 is inputted, the start signal is supplied to the self-closing device 10 via the starting current supply unit 114 And the locking of the emergency door 210 is released.

When the emergency opening switch 115 is provided in the control module and the emergency opening / closing operation is urgently required, the emergency opening switch 15 is pressed to shut off the starting current supplied to the magnetic closing device 10, The restraint state is canceled.

At this time, the control module 110 generates a warning sound by supplying a starting current to the horn 116 and arbitrarily opens and closes the corresponding emergency exit so as to propagate around the emergency exit. In this case, So that it is prevented from entering and exiting the emergency exit 200.

The power supply module 120 includes an input unit 120a receiving an external power source. In the present invention, the power supply module 120 is connected to the input unit 121 through an input unit 121, And the DC 24V of the fire prevention current which the electric safety is ensured because the voltage is low.

In the present invention, a voltage conversion unit 122 for reducing an input current of DC 24 V applied through the input unit 121 to 12 V DC, and a DC 12 V starting current And an auxiliary power source unit 123 that supplies the DC 12V current stored in the auxiliary battery 123a to the control module 110 when the DC 24V input current is not supplied.

Accordingly, the driving current of DC 24V supplied through the input unit 121 is reduced through the voltage conversion unit 122 to form a starting current of DC 12V, and the reduced starting current is supplied to the control module 121, And is supplied to the magnetic shut-off device 10 under the control of the control module 110. [

Thus, the emergency door automatic lock device according to the present invention reduces the driving current of DC 24V to a starting current of DC 12V, converts the same, and drives the control module and the magnetic closing device by the converted DC 12V starting current. The control module 110 and the magnetic close-up device 10 are started by the starting current of DC 12V, which is secured by electric pressure lower than the commercial AC 220V at a relatively low pressure.

In this embodiment, the control module 110 and the magnetic shut-off device 10 are started by converting the driving current of DC 24V to DC 12V to secure the improved electrical safety. The module 110 converts the pulp cycle of the starting current supplied to the magnetic shut-off device 10 to reduce the amount of electric current consumed due to the lock restraint of the emergency door 210 while securing the stable locking state of the emergency door 210 .

Particularly, in a state in which a driving current of DC 24 V is not supplied through the input unit 121, locking and locking of the emergency door 210 can be more continuously performed through the amount of electric current stored in the auxiliary power source unit 123.

To this end, in this embodiment, the pulse period conversion unit 113 is added to the starting current supply unit 114 so that the starting current is set to 100, which is the reference pulse period, to 1 When the emergency locking and locking of the emergency door is completed, the pulse period conversion unit 113 outputs a starting current to the magnetic closure device 10 at a pulse period of 110 to 120, which is relatively longer than the reference pulse period, Provides a steady state of lock restraint of the door by locking-constrained emergency doors while reducing starting current consumption by 10% to 20%.

4, the auxiliary power source unit 123 supplies the starting current stored in the auxiliary battery 123a to the control module 110, and when the driving current DC 12V is not supplied to the input unit 121, The starting current supply unit 114 of the module 110 increases the pulse supplying period of the DC 12 V starting current supplied from the auxiliary battery 123a through the pulse period converting unit 113 to 120 to 150 so that the supply amount of the starting current , Thereby achieving lock arresting of the emergency door through the minimum amount of starting current.

Therefore, the starting current stored in the auxiliary battery 123a is supplied to the pulse period converting unit 113 as a starting current in a pulse cycle of 120 to 150, the supply period of which is relatively longer than the reference pulse period 100, The amount of the starting current consumed by the locking restraint is reduced by 20% to 50%, so that the auxiliary battery 123a can be reduced in cost to reduce the manufacturing cost.

In addition, in the present embodiment, since the pulse period converting unit 113 supplies the starting current in a pulse cycle relatively longer than the reference pulse period 100 to lock and lock the emergency door, the starting current is supplied in the reference pulse period, The lock binding force is lowered rather than restricting the lock, and as a result, if the passenger pushes or pulls the emergency gate strongly, if the attempt of opening or closing the emergency gate is made, the emergency gate can be opened arbitrarily.

In order to solve this problem, in the present embodiment, as shown in FIGS. 1 and 2, a human body sensing unit 117 for sensing a human body approaching the exit 200 is added to the control module 110, The pulse period conversion unit 113 supplies the starting current to the magnetic shutdown unit 10 at the reference pulse period 100 as shown in FIG.

Therefore, when the unlocking of the emergency door is anticipated, the magnetic closure device generates a normal self-locking force through the starting current supplied in the reference pulse cycle, so that the unauthorized door is strongly constrained, So that the emergency exit can be stably closed.

Here, the human body detecting unit 117 may be an optical type for detecting a human body approaching the exit 200 through an infrared ray or a laser, or a contact type for detecting a human body by physical contact with an emergency door or an emergency exit In the present invention, an optical human body detection unit 117 is adopted as an example.

Accordingly, when the human body close to the exit 200 is detected by the human body detection unit 117, the pulse-current conversion unit 113 outputs a start-up current So that any opening / closing of the emergency exit by the emergency door can be stably prevented.

In this embodiment, the electromagnetic force sensing unit 118, which measures and changes an electric field that is emitted from the self-generating module 11 of the magnetic closure device 10 and reaches the ferromagnetic piece 12, Respectively.

The control module 110 detects a change in the electromagnetic force sensed through the electromagnetic force sensing unit 118 and senses and considers in real time the opening signs of an emergency door such as a strong wind or an external shock applied to the emergency door, The pulse of the starting current supplied to the magnetic obturator 10 is organically adjusted so as to minimize the consumption of the starting current and to stabilize the self-limiting of the emergency gate.

That is, when the emergency door 11 in which the ferromagnetic body 12 is disposed is stably fixed, the electromagnetic force of a certain intensity is detected in the ferromagnetic body, but if the emergency door is shaken by the draft, shock or vibration, the electromagnetic force substantially provided to the ferromagnetic body Is changed.

At this time, the control module 110 senses a change in the electromagnetic force through the electromagnetic force sensing unit 118, and sets and supplies a pulse period of a starting current supplied to the magnetic close-up unit 10 to the magnetic close- By forming a strong magnetic closing force, stable trapping of the closed emergency doors is achieved.

However, since the emergency door 210 is disposed in the emergency door 210 spaced apart from the control module 110 due to its nature, it is difficult to supply a current according to driving and transmit a signal of the sensed electromagnetic force value. Of course, it is possible to solve the problem by installing a separate power supply line or a signal supply line, but it is difficult to make a desirable solution because it may increase the construction cost and damage it.

In order to solve this problem, in this embodiment, the induction coil members 11a and 118a are disposed between the self-generating module 11 and the electromagnetic force sensing unit 118 fixed to the emergency door 210 as shown in Figs. 2 and 5, The electromagnetic force sensing unit 118 fixed to the door 210 receives electromagnetic force induced by the electromagnetic force sensing unit 118 fixed to the door frame and drives the received electromagnetic force to sense the electromagnetic force reaching the ferromagnetic body 12, Value to the control module 110 via the transmission member 118c.

Therefore, when the emergency door is closed, the electromagnetic force sensing unit 118 drives the self-generating module 11 through the induction coil member 118 to supply the electric current to the self-generating module 11 And detects the change of the electromagnetic force reaching the ferromagnetic body 12, and the detected electromagnetic force value is transmitted via the transmission member 118c to the control module 110 provided with the radio receiving member.

For example, if the value of the electromagnetic force sensed by the external door 210, which is self-restrained due to an external impact, external vibration, or draft, is not constant or is detected to be less than the reference value, The pulse period of the starting current supplied in the period is converted into the reference pulse period to prevent the self-restraint of the emergency door from being disassembled by external shock, external vibration, or draft.

Also, it is possible to check whether the self-generating module is operating normally through the detection of the electromagnetic force.

Thus, the DC 24 V input type emergency door automatic locking device 1 normally supplies the starting current to the magnetic closing device 10 at a pulse cycle of 120 to 150, which is relatively longer than the reference pulse period 100, When the human body close to the emergency exit is detected by the human body detection unit, the emergency door is shielded by supplying the starting current to the reference pulse period of 100, so that the emergency door can be stably self- Can be prevented.

1. Emergency door automatic locking device of DC 24V input type
10. Magnetic closure 11. Self-generating module
12. Ferromagnetic Sections
100. Control terminal 110. Control module
111. Fire signal receiving unit 112. Keypad unit
113. A pulse-
114. Starting current input unit 115. Emergency opening / closing switch
116. Horn 117. Human body detection unit
118. Electromagnetic force sensing unit
120. Power module 121. Input unit
122. Voltage conversion unit 123. Auxiliary power unit
123a. Secondary battery
Emergency exit 210. Emergency door

Claims (4)

A magnetic closure for locking the emergency gate by magnetic force to lock the emergency exit; And a control terminal including a control module for supplying a starting current to the magnetic closing device to control locking and restraining of an emergency door, and a power supply module for supplying a starting current,
The power module includes an input unit to which a driving power is inputted; A voltage conversion unit for reducing an input current of DC 24V applied through the input unit to DC 12V and a DC 12V starting current reduced through the voltage conversion unit to an auxiliary battery and supplying a DC 24V input current And an auxiliary power unit for supplying the stored DC 12V current to the control module if not supplied,
The driving current of DC 24 V supplied through the input unit is reduced through the voltage converting unit to form a starting current of DC 12 V and the reduced starting current is supplied to the control module and to the self- And a DC 24 V input type emergency door automatic lock device having an improved current supply structure. The control system according to claim 1, wherein the control module further comprises a fire signal receiving unit for receiving a fire signal from a situation room or a fire detector, a keypad unit for inputting a password, an operation for controlling supply of a starting current for starting the magnetic close- A current supply unit, and a control unit for controlling driving of the fire signal receiving unit, the cap pad unit, and the starting current supply unit,
The control unit is configured to cancel the lock-up of the emergency door by shielding the starting current supplied to the magnetic closing device through the starting current supply unit when a fire signal is inputted through the fire signal receiving unit or a password set through the keypad is input An emergency door automatic locking device of DC 24V input type with an improved current supply structure. The control module according to claim 1, wherein the control module and the power module are housed in an openable / closable housing having an opening / closing door, wherein the control module includes an opening / closing detection unit for detecting opening / closing of the housing by the opening / closing door, In addition,
Wherein the control module is configured to generate a warning sound by supplying a starting current to the horn when the enclosure is arbitrarily opened and closed without inputting the set password through the keypad unit. lock. The power supply unit according to claim 1, wherein a pulse period conversion unit is added to the starting current supply unit of the control module, and if the driving current DC 12V is not supplied to the input unit, the auxiliary power supply unit supplies the starting current stored in the auxiliary battery to the control module While,
When the starting current stored in the auxiliary power source unit is supplied to the control module, the starting current supplying unit increases the pulse supplying period of the DC 12 V starting current supplied from the auxiliary battery through the pulse period converting unit longer than the reference pulse period, And a DC 24 V input type emergency door automatic lock device having an improved current supply structure.
KR1020160010438A 2016-01-28 2016-01-28 Self-locking device of emergency door 24V DC input type having an improved current supply stucture KR101776119B1 (en)

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KR1020160010438A KR101776119B1 (en) 2016-01-28 2016-01-28 Self-locking device of emergency door 24V DC input type having an improved current supply stucture

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KR1020160010438A KR101776119B1 (en) 2016-01-28 2016-01-28 Self-locking device of emergency door 24V DC input type having an improved current supply stucture

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KR101776119B1 KR101776119B1 (en) 2017-09-19

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102003331B1 (en) * 2018-02-01 2019-07-24 허성범 Door lock and door assembly having the same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102003331B1 (en) * 2018-02-01 2019-07-24 허성범 Door lock and door assembly having the same

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