Portable emergency escape device

Abstract

The invention discloses a portable emergency escape device, which is provided with a shell, a winding drum rotatably arranged in the shell and wound with a wire rod, a reduction gear connected to the winding drum, a DC motor with a rotating shaft connected to the reduction gear, and a safety belt worn by a user. A braking resistor part for determining the descending speed is connected between two ends of a terminal of the DC motor, the resistance value of the braking resistor part is adjustable, and a constant speed control part is connected to the braking resistor part and changes the resistance value of the braking resistor part according to the body weight of a user so as to constantly maintain the descending speed irrespective of the body weight.

Description

[0001] This application is a divisional application of the patent application with application number 2021800898465 filed on December 9, 2021 and invention name “Portable Emergency Escape Device”.

[0002] This application claims priority to Korean Patent Application No. 10-2021-0006359 and Korean Patent Application No. 10-2021-0006360 filed on January 15, 2021, and all contents described in the application specifications and drawings of those applications are incorporated into this specification. Technical Field

[0003] The present invention relates to a portable emergency escape device, and more particularly to a portable emergency escape device that helps users to safely escape by descending to the ground through a building window or the like using a wire when an emergency such as a high-rise building fire occurs. Background Art

[0004] Typically, in the event of an emergency such as a fire in a building such as an apartment or a high-rise building, emergency escape strategies include evacuating using a fire ladder or jumping onto an air cushion installed on the ground.

[0005] However, escape using a ladder has a site limitation in that a wide space is required to install the ladder, and has the disadvantage that the ladder becomes useless in the case of a high-rise building that the ladder cannot reach.

[0006] Furthermore, the air cushion has the limitation of requiring a large number of personnel and a spacious space for installation, and has the problem that in the case of high-rise buildings, the escape time is delayed due to the anxiety of the escapee, and the wind makes it difficult to jump onto the air cushion accurately.

[0007] Therefore, an emergency escape device is proposed, which includes a reel rotatably arranged inside a shell and wound with a wire, a reduction gear connected to the reel to reduce the rotation speed of the reel during emergency escape, a hook connected to the end of the wire and hung and fixed on a pillar of a high-rise building, and a safety belt connected to the lower end of the shell and tied to the user's body.

[0008] Emergency escape devices using wires like these have the advantage of being able to quickly descend through a window in the event of a fire, allowing for emergency escape. However, since the descent speed is reduced solely by a reduction gear, the descent speed is inconsistent, causing users to feel uneasy and unable to use the emergency escape device reliably.

[0009] As an alternative, Korean Patent Publication No. 2018-0119180 proposes an emergency escape device for super high-rise buildings that uses a flow control valve in a speed adjustment part to allow the device to descend at a constant speed according to the weight of the escapee, and can reduce the descent speed as needed.

[0010] The Korean Patent Publication No. 2018-0119180 discloses an emergency escape system for super-high-rise buildings that regulates the rotation speed of the wire reel by adjusting the flow rate. To achieve this, a flow control valve is installed between the first and second piston cylinders to adjust the flow rate. As the amount of fluid moving within the first and second piston cylinders increases, the volume of the first and second piston cylinders changes significantly, increasing the rotation speed of the wire reel and the speed at which the escapee descends.

[0011] However, as mentioned above, the method of controlling the descent speed by fluid has the disadvantages of being bulky and heavy, complicated, and inconvenient to use. In addition, if the fluid transfer pipeline or piston cylinder is exposed to high temperature and causes fluid leakage, there is a concern that misoperation may occur or the device may become inoperable. Summary of the Invention

[0012] Technical issues

[0013] The present invention is proposed to solve the above-mentioned problems. Its purpose is to provide a portable emergency escape device that uses the braking resistor of a DC motor to perform braking during descent and automatically controls the descent speed according to the user's weight, thereby being able to safely descend at a constant speed regardless of the user's weight.

[0014] Another object of the present invention is to provide a portable emergency escape device having a function of starting a stable descent while correctly adjusting the user's posture before descending.

[0015] Another object of the present invention is to provide a portable emergency escape device having a structure that allows the descent speed to be freely adjusted according to the needs of the user during descent.

[0016] Another object of the present invention is to provide a portable emergency escape device having a structure that prevents the wire from causing the user's body to rotate during descent.

[0017] Yet another object of the present invention is to provide a portable emergency escape device having an improved structure capable of supporting high loads.

[0018] Technical Solution

[0019] In order to achieve the above-mentioned purpose, the present invention is a portable emergency escape device comprising a shell, a reel rotatably arranged inside the shell and wound with a wire, a reduction gear connected to the reel, a DC motor whose rotating shaft is connected to the reduction gear, and a safety belt worn by a user. The device is characterized in that a braking resistor part that determines the descent speed is connected between the two ends of the terminals of the DC motor, the resistance value of the braking resistor part is adjustable, and a uniform speed control part is connected to the braking resistor part to change the resistance value of the braking resistor part according to the weight of the user, thereby maintaining the descent speed constantly regardless of the weight.

[0020] The constant speed control unit may change the resistance value of the braking resistor unit by physically moving or deforming at least a portion of the component according to the weight of the user.

[0021] Alternatively, the constant speed control unit may change the resistance value of the braking resistor by sensing mechanical deformation of the reel shaft or the guide roller contacted by the wire differently according to the weight of each user through a spring disposed on one side of the housing.

[0022] Alternatively, the constant speed control unit may change the resistance value of the braking resistor unit by checking at least one of a voltage and a current generated between terminals of the DC motor during descent according to different weights of the users.

[0023] Alternatively, the constant speed control unit may change the resistance value of the brake resistor by checking the rotation amount of any one selected from the DC motor, the drum, the reduction gear, and the guide roller according to the weight of each user during descent.

[0024] As another alternative, the constant speed control unit may include a range selection depth switch that allows the user to select a range to which the user's weight belongs.

[0025] The constant speed control unit may perform PWM control on a voltage applied to the braking resistor unit.

[0026] The braking resistor unit may be configured by connecting a plurality of resistor elements in parallel or in series.

[0027] The braking resistor unit may be composed of a variable resistor.

[0028] The braking resistor unit may also be composed of a plurality of LEDs or a motor.

[0029] Short-circuiting both terminals of the DC motor provides a braking function.

[0030] A portable emergency escape device is provided, characterized in that a start switch is provided in the shell for starting the descending movement by switching from a first state in which the two ends of the DC motor terminals are short-circuited to a second state in which the two ends of the DC motor terminals are connected to the braking resistor part.

[0031] The start switch can be configured as an on / off button, a handle, or a rope with a safety pin.

[0032] The housing may be fixed to a side of the building and the safety belt may be connected to an end portion of the wire unwound from the drum.

[0033] The wire may be covered with a fire-resistant coating or protective tube over a portion of its length or over its entire length.

[0034] A portable emergency escape device is provided, characterized in that at least two or more reels are arranged in series or in parallel in the shell, and when in use, at least two or more wires are unwound to the outside of the shell and descend.

[0035] The safety belt may be formed in a loop shape into which the user's arm can be inserted, and two of the safety belts may be attached to the housing so that two users can use the safety belt together.

[0036] The wires unwound from the two or more drums may be connected to a hook and loop.

[0037] Furthermore, the apparatus may further include a roller or ring-shaped guide component fixed to the periphery of each reel to constantly maintain the position of the unwinding of the wire.

[0038] The end portion of the wire may be connected to a hook that is hooked on a rod-shaped support fixed to the building, or the wire may be hooked on the wire in a state where the wire is wound around a pillar of the building.

[0039] Technical Effects

[0040] The portable emergency escape device according to the present invention has the following effects.

[0041] First, the DC motor's braking resistor is used to brake during descent, automatically controlling the descent speed according to the user's weight, allowing the vehicle to safely descend at a constant speed regardless of weight.

[0042] Second, before descending, the user applies weight to tighten the wires secured to the building, and after stabilizing themselves by placing their feet on the building's railings, the rope can be smoothly untied and lowered with a simple button press. This prevents shock loads on the wires, preventing damage and potentially accidents.

[0043] Third, before descending, the wire will not loosen even if it is tightened, so the descent can begin after the user has made the descending posture or mental preparation.

[0044] Fourth, unlike existing descenders that require one person to wait and escape in turn in an emergency situation when a fire occurs in a high-rise building and every second counts, most users can use their own portable emergency escape devices to escape quickly.

[0045] Fifth, when two or more wires are untied from the housing at the same time, the user's body can be prevented from rotating during the descent.

[0046] Sixth, high loads can be supported by more than two wires, so in an emergency escape, children and parents can hang on their respective safety belts and descend at the same time.

[0047] Seventh, when the emergency escape device is used for descent operations during wartime, the user's body will not rotate, so the user can maintain balance and can stably support heavy military uniforms and combat equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] Figure 1 A perspective view showing the appearance of a portable emergency escape device according to a preferred embodiment of the present invention;

[0049] Figure 2 It is from Figure 1 A perspective view showing the internal structure of the separated shell;

[0050] Figure 3 yes Figure 2 Front view of

[0051] Figure 4 It shows Figure 1 A perspective view of a modified example of a descent start switch;

[0052] Figure 5 is a perspective view showing the appearance of a portable emergency escape device with a safety handle according to one embodiment of the present invention;

[0053] Figure 6 is a perspective view showing an example of a safety belt connected to a wire according to an embodiment of the present invention;

[0054] Figure 7 and Figure 8 is a perspective view showing an installation example of a portable emergency escape device;

[0055] Figure 9 This is a wiring diagram that briefly shows the structure for braking and stopping a DC motor.

[0056] Figure 10is a perspective view showing an example of use of a portable emergency escape device according to a preferred embodiment of the present invention;

[0057] Figure 11 is a perspective view showing the appearance of a portable emergency escape device according to another embodiment of the present invention;

[0058] Figure 12 It is from Figure 1 A perspective view showing the internal structure of the separated shell;

[0059] Figure 13 yes Figure 12 Front view of

[0060] Figure 14 It shows Figure 13 A partially enlarged front view of an example of a guide member in the form of an additional roller;

[0061] Figure 15 is a perspective view showing the appearance of a portable emergency escape device according to another embodiment of the present invention;

[0062] Figure 16 It is from Figure 15 A perspective view showing the internal structure of the separated shell;

[0063] Figure 17 This is a wiring diagram that briefly shows the structure for braking and stopping a DC motor.

[0064] Figure 18 This is a circuit diagram illustrating a configuration in which a constant speed control unit performs PWM control. DETAILED DESCRIPTION

[0065] Figure 1 This is a perspective view showing the appearance of a portable emergency escape device according to a preferred embodiment of the present invention. Figure 2 It is from Figure 1 The detached shell shows a perspective view of the internal structure. Figure 3 yes Figure 2 Front view of .

[0066] See also Figures 1 to 3 According to a preferred embodiment of the present invention, the portable emergency escape device includes a housing 100 of a predetermined shape, a reel 101 rotatably disposed inside the housing 100 and for winding a wire 103, a reduction gear 109 connected to the reel 101 and configured to reduce the rotation speed of the reel 101 during emergency escape, a DC motor 102 having a rotating shaft connected to the reduction gear 109, a braking resistor 106 connected to the DC motor 102, and a constant speed control unit (see FIG. 1 ) for maintaining a constant descending speed regardless of body weight. Figure 9115), a safety belt 104 connected to the lower end of the housing 100 to fix the upper body of the escapee, and a hook 105 connected to the end portion of the wire 103 and hung and fixed to a predetermined supporting structure fixed to a high-rise building.

[0067] The reel 101 is provided in the housing 100 and is passively rotated by the force of the escapee's descent pulling the wire 103. Preferably, both ends of the rotating shaft of the reel 101 are supported in the housing 100 to prevent the user's load from deviating to one side of the reduction gear 109.

[0068] Wire 103 can be a conventional rope or rope made of various materials. Furthermore, wire 103 may be partially or entirely coated with a fire-resistant coating or protective tube to ensure flame resistance in the event of a fire. Furthermore, at least a portion of wire 103 may be provided with a light-emitting component (not shown), such as an LED or EL wire, to ensure visibility for identifying the descent posture in the event of a fire, on cloudy days, or at night.

[0069] The reduction gear 109 reduces the descent speed of the escapee according to a set gear ratio and transmits the speed to the rotating shaft. The reduction gear 109 can be composed of various well-known gear assemblies.

[0070] The DC motor 102 is rotated by an external force to generate braking force. The DC motor 102 is not actively rotated by an external power source, but is passively rotated together with the drum 101 by the force of pulling the wire 103 generated by the descent of the escapee (free fall).

[0071] A braking resistor 106 connected between the terminals of the DC motor 102 determines the speed of descent. Controlling the braking resistor 106 allows the vehicle to descend while maintaining a constant descent speed regardless of weight, provided its resistance value matches the weight of the evacuee during an emergency escape. Furthermore, short-circuiting the terminals of the DC motor 102 into direct contact with each other provides a braking function. The terminals are electrically connected to a separate short-circuiting switch 107. When the short-circuiting switch 107 is turned on, the DC motor 102 is short-circuited and a braking action is applied. The short-circuiting switch 107 is exposed on the exterior of the housing 100.

[0072] The braking force generated by the power generation of DC motor 102 varies depending on the resistance value of brake resistor 106. Specifically, when the resistance value of brake resistor 106 connected to DC motor 102 is relatively large, the energy consumed by brake resistor 106 as Joule heat is large, and the braking force of DC motor 102 is weak, thus increasing the descent speed. When the resistance value is relatively small, the energy consumed as Joule heat is small, and the braking force of DC motor 102 is large, thus slowing the descent speed. When the resistance value is 0, it is a short-circuit state, resulting in a large braking force and a virtual halt in descent.

[0073] For example, when the resistance value of the braking resistor portion 106 is 100 ohms (Ω) degree, the braking force generated by the DC motor 102 is large, and the reel 101 connected to the rotating shaft of the DC motor 102 slowly rotates so that the speed at which the wire rod 103 is untied is slow, so the descent is carried out slowly. On the contrary, when the resistance value of the braking resistor portion 106 is adjusted to 200Ω, 300Ω, 400Ω etc. gradually increase, the braking force generated by the DC motor 102 gradually decreases, so the descent is gradually accelerated. The resistance value of the braking resistor portion 106 as described above determines the descent speed, and therefore the resistance value corresponding to the weight of the user is controlled to enable the user (escaper) to obtain a sense of safety.

[0074] like Figure 9 As shown, both ends of the terminals of the DC motor 102 are selectively connected to start switches 112 and 113 for starting braking (short-circuit state), and between the two ends of the terminals, a braking resistor part 106 composed of multiple resistance elements with different resistance values ​​connected in parallel or in series and a uniform speed control part 115 for changing the resistance value of the braking resistor part 106 to keep the descent speed constant is connected in parallel with the start switches 112 and 113, which are used to adjust the descent speed.

[0075] Alternatively, the brake resistor unit 106 may be composed of a conventional rotary or sliding variable resistor (potentiometer). In this case, the descent speed can be reduced or increased by moving the handle of the variable resistor. The handle of the variable resistor may be combined with a predetermined spring to provide an elastic restoring force. The function of increasing or decreasing the descent speed by adjusting the variable resistor as needed can be used for military training or wartime landing operations, etc.

[0076] As another alternative, the braking resistor unit 106 may also be composed of a plurality of LEDs or motors. In addition, the braking resistor unit 106 may also be composed of various electrical / electronic components (or devices) capable of adjusting the overall resistance value.

[0077] The uniform speed control unit 115 physically moves or deforms at least a portion of the components according to the user's weight to change the resistance value of the brake resistor unit 106. Preferably, the uniform speed control unit 115 can sense the mechanical deformation of the axis of the reel 101 or the predetermined guide roller (not shown) in contact with the wire 103 according to the weight of each user by a spring or plate-shaped spring (not shown) provided on one side of the housing 100 to change the resistance value of the brake resistor unit 106. Specifically, when the uniform speed control unit 115 is a user with a weight of, for example, 100 kg, and the axis of the reel 101 or the axis of the guide roller undergoes a mechanical deformation of a first displacement corresponding to the weight, the spring physically moves or deforms a first length accordingly to automatically set the resistance value of the brake resistor unit 106 to, for example, 100 Ω. Therefore, when the DC motor 102 generates a relatively large braking force, the wire 103 is slowly unwound while the user is driven to descend. In addition, the uniform speed control unit 115 is a mechanical deformation of the amount of the second displacement of the shaft of the reel 101 or the shaft of the guide roller corresponding to the weight, and accordingly the spring physically moves or deforms the second length so that the resistance value of the brake resistor 106 is automatically set to, for example, 400Ω. Therefore, a relatively small braking force occurs at the DC motor 102, so the wire 103 is relatively quickly untied and drives the user to descend compared to the situation of 100kg. In this way, the uniform speed control unit 115 controls so that different braking forces occur according to the weight of the user, so anyone can descend at a constant speed regardless of the weight of the user. If there is no speed control function of the uniform speed control unit 115 as described above, the situation that the user's weight is 100kg applies a significantly larger rotational force (torque) to the rotating shaft of the DC motor 102 than the situation of 50kg, causing a significant decline at a significantly faster speed.

[0078] As an alternative, the constant speed control unit 115 can check at least one of the voltage and current generated between the terminals of the DC motor 102 according to the weight of each user during descent to change the resistance value of the brake resistor unit 106. To this end, the constant speed control unit 115 may include a general current sensing sensor or a voltage sensing sensor. For the constant speed control unit 115, for example, if the user is an adult, the weight is heavier than that of a child, and therefore a relatively high power is generated between the terminals of the DC motor 102, the constant speed control unit 115 changes the resistance value of the brake resistor unit 106 by checking at least one of the voltage and current generated, and sensing the power generation of the DC motor 102 according to the weight of each user. By changing the resistance value of the brake resistor unit 106, the process of maintaining a constant descent speed regardless of the weight of the user is the same as the above-mentioned method.

[0079] Alternatively, the constant speed control unit 115 may change the resistance value of the brake resistor unit by varying the rotation amount of any one selected from the DC motor, the drum, the reduction gear, and the guide roller according to each user's weight during descent. The process of maintaining a constant descent speed by changing the resistance value of the brake resistor unit 106 regardless of the user's weight is the same as described above.

[0080] Alternatively, the constant speed control unit 115 may include a range selection depth switch that allows the user to select a weight range. In this case, the range selection depth switch may be divided into, for example, "Adult" and "Children," or may be divided into predetermined weight ranges such as "10-30 kg," "31-60 kg," "61-90 kg," and "91-120 kg." The process of maintaining a constant descent speed regardless of the user's weight by varying the resistance value of the braking resistor 106 is the same as described above.

[0081] More preferably, the uniform speed control unit 115 can perform PWM (Pulse Width Modulation) control by utilizing a predetermined switching element 115d connected to the braking resistor unit 106, thereby maintaining a constant descent speed regardless of the user's weight. When PWM control is performed, substantially the same effect as changing the resistance value of the braking resistor unit 106 by changing the duty ratio (Duty Ratio) of the pulse width of the voltage applied to the braking resistor unit 106 according to the weight of each user can be obtained. The pulse control is not limited to the PWM method, and a variety of well-known pulse modulation methods or electrical signal control methods can be adopted and executed. The following describes in detail the structure of the uniform speed control unit 115 with the example of performing pulse control using the PWM method as the center.

[0082] Specifically, Figure 18 As shown, the constant speed control unit 115 includes an SMPS (Switching Mode Power Supply) regulator 115a, a voltage detection unit 115b, a PWM control microcomputer 115c, a switching element 115d and a B-contact relay 115f.

[0083] The SMPS regulator 115 a switches and controls the electromotive force generated in the DC motor 102 to output a rated voltage for driving the PWM control microcomputer 115 c and the B-contact relay 115 f.

[0084] The voltage detection unit 115 b detects the voltage of the electromotive force generated in the DC motor 102 and transmits the detected voltage to the PWM control microcomputer 115 c .

[0085] PWM control microcomputer 115c senses the user's weight from the voltage detected by voltage detector 115b and, based on this, performs PWM control to change the resistance of brake resistor 106, which is physically connected to both ends of DC motor 102. PWM control microcomputer 115c controls the duty cycle of the pulse width by driving a switching element 115d, such as a FET (Field Effect Transistor), connected to brake resistor 106. The FET can be replaced by various known semiconductor switching elements.

[0086] B-contact relay 115f also functions as a safety device to prevent a fall caused by a failure to brake the DC motor 102 by connecting a braking resistor 106 to both ends of the DC motor 102 when at least one of the SMPS regulator 115a, PWM control microcomputer 115c, and switching element 115d fails. Specifically, B-contact relay 115f has a switch structure (Normally Closed) that is normally open (on) (when no control signal is input) and closed (off) when a control signal is input. Therefore, even if at least one of the SMPS regulator 115a, PWM control microcomputer 115c, or FET fails, B-contact relay 115f switches to the open state, connecting the braking resistor 106 to both ends of the DC motor 102.

[0087] The PWM control microcomputer 115c inputs a control signal to the B contact relay 115f during normal PWM control operation, so that the contacts of the B contact relay 115f are in a closed state, isolated from each other. The PWM control microcomputer 115c is connected between the source terminal of the FET serving as the switching element 115d and the shunt resistor 115e (see Figure 18 116) to measure the current flowing through switching element 115d. PWM control microcomputer 115c detects a malfunction in switching element 115d by measuring the current value. Normal PWM control cannot be performed if no current is flowing or the switching element is short-circuited. Therefore, B-contact relay 115f is switched to the on state, where its contacts are in contact, to connect brake resistor 106 to both ends of DC motor 102. To this end, B-contact relay 115f is connected in parallel with switching element 115d and shunt resistor 115e, and in series with brake resistor 106.

[0088] The start switches 112 and 113 start the descent by switching from a first state in which the terminals of the DC motor 102 are short-circuited to a second state in which the terminals of the DC motor 102 are connected to the brake resistor 106. The user can also operate the start switches 112 and 113 to stop at a desired location if necessary during descent.

[0089] The start switches 112 and 113 are formed as buttons with cables of predetermined length extending to the interior of the housing 100. As an alternative, the start switches 112 and 113 can also be formed as Figure 4 A predetermined safety pin (not shown) inserted into the housing 100 is connected to the end portion of the cord. Here, the safety pin can be configured to be linked to the short-circuit switch 107. As another alternative, the start switches 112 and 113 can also be configured as handles, knobs, or on / off buttons provided on the exterior of the housing 100 without an extension cable.

[0090] The safety belt 104 is formed into a loop shape that the user's arms can be inserted into. Preferably, the safety belt 104 is worn under the user's armpits on both sides.

[0091] The safety belt 104 may be connected or detached to each other at the chest portion through a predetermined joint piece while the user's arms are inserted into the safety belt 104 .

[0092] like Figure 5 As shown, a circular safety handle can be attached to one side of the safety belt 104 so that the user can grab and hang it with his hands when in use. In addition, when the housing 100 is fixed to one side of a building, as shown in FIG. Figure 6 The safety belt 104 shown may be connected to the end portion (lower end) of the wire 103 unwound from the reel 101 .

[0093] During emergency escape, the hook 105 connected to the end portion of the wire 103 is hung on the side of the pillar and fixed, and the safety belt 104 is hung on the user's upper body, that is, tied under the armpit. Figure 7 As shown, the hook 105 in the form of a hook and loop is hung on a rod-shaped support 1 arranged on a balcony or rooftop of a building, or as shown in FIG. Figure 8 The wire 103 is wound around the building pillar or the rod-shaped support 1 and then hung and bound.

[0094] In the event of an emergency such as a fire in a high-rise building, users (escapers) should Figure 10 As shown, the hook 105 in the form of a hook and ring is hung on a rod-shaped support 1 set on a pillar of a building or a balcony, rooftop, etc., and the user applies weight to tighten the wire fixed to the building while stepping on the building railing to prepare for descending.

[0095] Afterward, when start switches 112 and 113 are correctly operated, such as by pressing a button or pulling a rope, the first state, in which the terminals of DC motor 102 are short-circuited, is switched to the second state, in which the terminals of DC motor 102 are connected to braking resistor 106. This weakens the braking force generated by DC motor 102, allowing the machine to descend while the rope unwinds smoothly. This prevents impact loads on the wires, thus preventing safety incidents such as wire breakage.

[0096] The descent speed can be maintained constant regardless of the user's weight by the constant speed control unit 115. The constant speed control unit 115 performs PWM control to change the resistance value of the brake resistor unit 106 by physically moving or deforming at least a portion of the component according to the user's weight, or by checking the amount of power generated between the terminals of the DC motor 102 differently for each weight during descent, or by selecting a weight range setting value for the depth switch according to a range set by the user. For example, when used by a relatively heavy adult, the resistance value of the brake resistor unit 106 is reduced to an appropriate value to reduce the descent speed, while when used by a relatively light child, the resistance value of the brake resistor unit 106 is increased to an appropriate value to increase the descent speed. This allows the descent speed to be maintained constant regardless of weight.

[0097] When the user almost reaches the ground and wants to stop at the desired position, he or she operates the start switches 112 and 113 to short-circuit the terminals of the DC motor 102. The forced power generated by the DC motor 102 suppresses the rotation of the reel 101, so that the wire 103 cannot continue to unwind, thereby stopping the descent.

[0098] Figure 11 is a perspective view showing the appearance of a portable emergency escape device according to another embodiment of the present invention, Figure 12 It is from Figure 1 The detached shell shows a perspective view of the internal structure. Figure 13 yes Figure 12 Front view of .

[0099] See also Figures 11 to 13According to a preferred embodiment of the present invention, a portable emergency escape device includes a shell 100 of a predetermined shape, at least two reels 101 rotatably arranged inside the shell 100 and used to wind wires 103, a reduction gear 109 connected to each reel 101 and reducing the rotation speed of the reel 101 during emergency escape, a DC motor 102 whose rotating shaft is connected to each reduction gear 109, a braking resistor part 106 connected to the DC motor 102, a hook 105 connected to the end portion of each wire 103 and hung and fixed on a predetermined supporting structure fixed to a high-rise building, and a safety belt 104 connected to the lower end of the shell 100 to fix the upper body of the escapee.

[0100] At least two reels 101 are arranged in series or in parallel within housing 10. The following description focuses on an embodiment in which two reels 101 are arranged in series within housing 100. Reels 101 can be passively rotated by the force generated by a descent pulling on wire 103. Preferably, both ends of the rotation axis of each reel 101 are supported within housing 100 to prevent the user's load from being biased toward one side of reduction gear 109.

[0101] Wire 103 can be made of various materials, such as conventional ropes. Furthermore, wire 103 can be partially or entirely coated with a fire-resistant coating or protective tube to ensure its incombustibility in the event of a fire. Furthermore, at least a portion of wire 103 can be provided with a light-emitting component (not shown), such as an LED or EL wire, to ensure visibility for identifying the descent posture in the event of a fire, on cloudy days, or at night.

[0102] like Figure 14 As shown, it is preferred that a guide member 110 consisting of a pair of rollers is fixed to the housing 100 via a predetermined bracket 111 around each reel 101 to constantly maintain the position at which the wire 103 is unwound. Alternatively, the guide member 110 may be replaced by a single roller or a ring-shaped guide member 110 through which the wire 103 passes. According to this configuration, even if the positions of the wires 103 unwound from the two reels 101 are different, the wires 103 are always unwound from a predetermined position (preferably, a middle position) based on the longitudinal direction of the reel 101, thereby preventing the escapee from being disturbed when hanging.

[0103] like Figure 15 and Figure 16 As shown, the wires 103 unwound from the two drums 101 can also be connected in a hook and loop.

[0104] The reduction gear 109 reduces the descent speed of the escapee according to a determined gear ratio and transmits the speed to the rotating shaft. The reduction gear 109 can be composed of various well-known gear components.

[0105] The DC motor 102's shaft rotates by external force to generate braking force. The DC motor 102's shaft rotates passively with the drum 101 by the force of the escapee's descent (free fall) pulling the wire 103, rather than actively rotating by an external power source.

[0106] At least one braking resistor 106 is connected between the terminals of the DC motor 102 to determine the descent speed. Therefore, during an emergency escape, the braking resistor allows the vehicle to maintain a constant descent speed regardless of the weight of the evacuee. Short-circuiting the terminals of the DC motor 102 directly into contact with each other provides a braking function. The terminals are electrically connected to a switch 107. Turning on switch 107 short-circuits the DC motor 102, thereby providing a braking effect. Switch 107 is positioned so as to be exposed externally from the housing 100.

[0107] The braking force generated by the power generation of DC motor 102 varies depending on the resistance value of brake resistor 106. Specifically, if the resistance value of brake resistor 106 connected to DC motor 102 is relatively high, the energy consumed by brake resistor 106 as Joule heat is high, and the braking force of DC motor 102 is weak, thus accelerating the descent speed. If the resistance value is relatively low, the energy consumed as Joule heat is low, and the braking force of DC motor 102 is high, thus slowing the descent speed. A resistance value of 0 indicates a short circuit, resulting in a high braking force and a virtual halt in descent.

[0108] For example, when the resistance value of the braking resistor portion 106 is smaller than 100Ω, the braking force generated by the DC motor 102 is large, and the reel 101 connected to the rotating shaft of the DC motor 102 rotates slowly, and the speed at which the wire rod 103 is untied is slow, so it slowly descends. On the contrary, when the resistance value of the braking resistor portion 106 is adjusted to gradually large, as in the case of 200Ω, 300Ω, 400Ω, etc., the braking force generated by the DC motor 102 gradually weakens, so it gradually descends rapidly. The resistance value of the braking resistor portion 106 as described above determines the descent speed, so it is preferably set to an appropriate resistance value so that the escapee can obtain a sense of safety.

[0109] like Figure 17 As shown, a switch 107 for starting braking (short-circuit state) is selectively connected to both ends of the terminal of the DC motor 102. In order to be connected in parallel with the switch 107, a speed adjustment unit 108 can be connected between the two ends of the terminal to select a specific resistor from the multiple resistors included in the braking resistor unit 106 to adjust the descending speed. The speed adjustment unit 108 can be configured in various forms such as a button, a knob, or a rotary handle. Although Figure 17Although not shown, similarly to the above-mentioned embodiment, the braking resistor unit 106 is connected to the constant speed control unit 115 for maintaining the descending speed constant independently of the user's weight and independently of the speed adjustment unit 108 .

[0110] The safety belt 104 is formed into a ring shape that the user's arm part can be inserted into, and preferably two are attached to the housing 100 so that two users can use it together. This safety belt 104 is worn in an X-shaped or vertical shape under the user's armpits on both sides.

[0111] The two safety belts 104 can be configured to have the same shape and size so that they can be attached to the housing 100 and used in an overlapping manner. Furthermore, the safety belts 104 on both sides can be connected or detached at the chest portion by a predetermined joint piece while the user's arms are inserted into the safety belts 104.

[0112] When the housing 100 is fixed to one side of a building during use, the safety belt 104 can be connected to the end portion of the wire 103 unwound from the reel 101. In addition, a circular safety handle can be attached to one side of the safety belt 104 so that the user can grab it and hang it during use.

[0113] During an emergency escape, the carabiner hooks 105 connected to the ends of the two wires 103 are attached to the side of a support column, and the safety belt 104 is clipped to the upper body of the user (escaper), i.e., secured under the armpits. Specifically, the carabiners are attached to a rod-shaped support such as a rooftop of the building, or the wires 103 are wrapped around a building support column or the rod-shaped support and secured to the wires 103. With two safety belts 104 attached to the housing 100, children and adults can also descend together.

[0114] As described above, when a user steps out of a building in a ready state to escape, the two reels 101 are slowly rotated by a braking force inversely proportional to the braking resistance value of the DC motor 102 while the two wires 103 are untied, so that the escapee can descend safely at a set descent speed.

[0115] When the user is about to reach the ground and wants to stop at the desired position, the user adjusts the start switches 112 and 113 to short-circuit the terminals of the DC motor 102. The forced power generated by each DC motor 102 suppresses the rotation of the reel 101, resulting in the wire 103 being unable to untie, and thus stopping the descent.

[0116] Although the present invention has been described above with reference to limited embodiments and drawings, the present invention is not limited thereto. Obviously, a person skilled in the art in the art to which the present invention pertains can make various modifications or variations within the scope equivalent to the technical concept of the present invention and the scope of the appended claims.

[0117] Industrial Availability

[0118] With this invention, multiple users can quickly escape from a high-rise building fire using their own portable emergency escape devices. During descent, the DC motor's braking resistor provides braking, automatically controlling the descent speed based on the user's weight regardless of their weight, enabling safe descent at a constant speed.

Claims

1. A portable emergency escape device comprising a housing, a reel rotatably disposed within the housing and wound with a wire, a reduction gear connected to the reel, a DC motor with a rotating shaft connected to the reduction gear, and a safety belt worn by a user, characterized in that: include: A braking resistor connected between the terminals of the DC motor to determine the descending speed; as well as A constant speed control unit is connected to the braking resistor unit, and changes the resistance value of the braking resistor unit according to the user's weight to keep the descending speed constant regardless of the weight. The constant speed control unit is used to: detecting the amount of power generated by the electromotive force generated by the DC motor during descent, or detecting the amount of rotation of any one selected from the group consisting of the DC motor, the drum, the reduction gear, and the guide roller during descent, wherein the amount of power generation or the amount of rotation varies according to the weight of the user; By changing the resistance value of the braking resistor according to the amount of power generation or the amount of rotation, a constant descending speed is maintained for any user regardless of the user's weight; The constant speed control unit includes an SMPS voltage regulator, a PWM control microcomputer and a switching element. The SMPS regulator outputs a constant voltage by switching and controlling the electromotive force generated by the DC motor. The PWM control microcomputer is driven by a constant voltage output from the SMPS regulator, and performs PWM control to change a resistance value of the braking resistor portion.

2. The portable emergency escape device according to claim 1, characterized in that: When at least one of the SMPS regulator, the PWM control microcomputer, and the switching element fails, the basic resistor connected to both terminals of the DC motor is activated to prevent a fall accident caused by failure of braking.

3. The portable emergency escape device according to claim 1, characterized in that: When at least one of the SMPS regulator, the PWM control microcomputer, and the switching element fails, the braking resistor is automatically connected to both terminals of the DC motor to prevent a falling accident caused by failure of braking.

4. The portable emergency escape device according to claim 1, characterized in that: The constant speed control unit further includes a voltage detection unit that detects the voltage of the electromotive force generated by the DC motor. The PWM control microcomputer performs PWM control on the switching element according to the voltage value detected by the voltage detection unit to change the resistance value of the braking resistor unit.

5. The portable emergency escape device according to claim 1, characterized in that: The braking resistor portion is composed of a variable resistor and is used to increase or decrease the descending speed.

6. The portable emergency escape device according to claim 1, characterized in that: A braking function is provided when both terminals of the DC motor are short-circuited.

7. The portable emergency escape device according to claim 1, characterized in that: Part of the length or the entire length of the wire is covered with a fire-resistant coating or a protective tube.

8. The portable emergency escape device according to claim 1, characterized in that: The end portion of the wire is connected with a hook, and the hook can be hung on a rod-shaped support fixed to a building, or hung on the wire when the wire is wound around a column of a building.

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