Contact protection device below lock hook of ground lock type rolling gate

Abstract

The invention discloses a touch protection device below a lock hook of a ground lock type rolling gate. The invention aims to solve the problems that when a ground lock type rolling gate is used, a user forgets to open a lock hook box cover at first and directly walks after a remote controller is pressed to close the door, theft prevention of a portal is unsafe, an electric rolling gate is damaged, and the feasibility of the prior art is poor. According to the technical scheme, the device comprises a lock hook sheath, a touch switch and a signal wireless transmission circuit board, wherein the lock hook sheath tightly sleeves the outer side of a lock hook mechanism shell on a lower beam of the ground lock type rolling gate and extends to the lower side of a lock hook; the touch switch is mounted in the lock hook sheath; the signal wireless transmission circuit board is mounted on the lower beam of the ground lock type rolling gate; a signal transmission wire of the probing switch is connected with the signal wireless transmission circuit board, a probing switch installation groove is formed in the outward side of the lower portion in the lock hook sheath, a vertical lower through hole is formed in the bottom face of the probing switch installation groove, the probing switch is provided with a probing head stretching out and drawing back in the vertical direction, and the probing head is connected with the signal wireless transmission circuit board. And the probe switch is mounted in the probe switch mounting groove, and a probe head of the probe switch extends out of the latch hook sheath downwards from the lower through hole.

Description

Technical Field

[0001] The invention relates to a safety protection device for a ground-lock type rolling shutter door, in particular to a detection protection device under a lock hook of a ground-lock type rolling shutter door. Background Art

[0002] A rolling shutter door is a series of metal curtains with multiple articulated hinges. The left and right sides slide within fixed guideways, and the doors rotate up and down, pivoting around a reel above the door. Electric rolling shutters are a common type of rolling shutter door. Their structural characteristic is that the reel above the door is driven by a motor, often controlled by a remote control. A ground-locked rolling shutter door features a hook box buried in the ground. The lock and hook mechanism are mounted on the lower beam of the rolling shutter door, with the hooks extending from the underside. Left and right hooks enter the hook box and latch onto the fixed rod, locking the door. The hook box has a lid at the top. When closed, the lid is roughly flush with the ground to avoid any indentations. To close the door, the lid must be opened first, allowing the left and right hooks to enter the hook box and lock the door, securing the lower beam to the ground. At present, due to the habits of some users, when using the ground-locked rolling shutter door, they often forget to open the cover of the lock hook box first, and press the remote control to close the door, and then leave directly. The left and right lock hooks are pressed on the cover, resulting in the lock hooks not being locked, which creates an anti-theft safety problem for the door; when the motor limit mechanism is not good, the electric rolling shutter door will continue to press down, causing damage to the electric rolling shutter door, and the maintenance cost of the electric rolling shutter door is high, which reduces the durability of the ground-locked rolling shutter door and increases the cost of use.

[0003] Chinese Patent Publication No. CN207048653U discloses a new type of rolling shutter door, comprising symmetrically arranged guide rails and curtain strips arranged between the guide rails and slidingly cooperating with the guide rails, characterized in that: a guide wheel is provided at the top of the guide rail, an infrared stop sensor probe is provided in the middle of the guide rail, an electronic latch is provided at the bottom of the guide rail, lock buckles cooperating with the electronic latch are provided at both ends of the bottom of the curtain strip, a resistance rebound safety device is provided at the center of the bottom of the curtain strip, the top of the curtain strip is a reel, one end of the reel is connected to a motor, a PLC controller is provided at the end of the motor away from the reel, and the motor, infrared stop sensor probe, electronic latch, and resistance rebound safety device are all connected to the PLC controller. However, this solution does not solve the problem of the lock hook box cover of the ground-locked rolling shutter door not being opened, because the cover of the ground-locked rolling shutter door is at the same height as the ground when it is not opened, so the resistance rebound safety device perceives the lock hook box cover in the same way as the ground, and cannot perceive any abnormality in the cover, and the infrared stop sensor probe detects whether someone passes through the door opening, not the situation on the ground under the door, so this solution is not suitable for solving the problem of the lock hook box cover of the ground-locked rolling shutter door not being opened.

[0004] Chinese patent announcement No. CN210422435U discloses an electric rolling shutter door ground hook lock capable of protecting a face cover, comprising a lock head, an embedded box, and a trench box; the lock head is arranged at the bottom of the rolling shutter door, the embedded box is arranged and fixed in the ground, the trench box is connected to the embedded box by screws at the bottom, openings are provided on the two side walls of the upper end of the trench box, and limit rods are riveted in the openings, a magnetic sensor is provided on the inner side of the bottom of the lock head, the magnetic sensor is connected to the controller, the controller is connected to the motor driver, the motor driver is connected to the motor, the face cover is hinged to the trench box body, and a magnet is fixed on the surface of the face cover on the trench box, and the position of the magnet is arranged directly below the magnetic sensor. The disadvantages of this solution are: since the magnetic sensor is arranged on the inner side of the bottom of the lock head, but the bottom of the lock head is the left and right lock hooks, the left and right lock hooks cannot be installed with magnetic sensors, and the signal transmission wires of the magnetic sensors from the left and right lock hooks that perform the swinging action must be connected to the controller, which is even more unreliable, so the feasibility of this solution is poor; if the magnetic sensor is installed on the lock hook mechanism housing located on the outer side of the upper middle part of the lock hook, the left and right lock hooks will have already pressed against the trench box cover when the magnetic sensor on the lock hook mechanism housing has not yet sensed the magnet on the trench box cover, and the magnetic induction purpose cannot be achieved. Summary of the Invention

[0005] In order to overcome the problem that people often forget to open the cover of the lock hook box when closing the door when using the ground lock type rolling shutter door, and leave directly after pressing the remote control to close the door, resulting in the lock hook not being locked, causing the door anti-theft safety problem, and causing damage to the electric rolling shutter door, reducing the durability of the ground lock type rolling shutter door and increasing the cost of use, as well as the poor feasibility of the existing solution to prevent the lock box cover from being opened, the purpose of the present invention is to provide a detection protection device under the lock hook of the ground lock type rolling shutter door, which can overcome the defects of the prior art.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a detection protection device under the lock hook of a ground-locked rolling shutter door, characterized in that it includes a lock hook cover that is tightly sleeved on the outside of the lock hook mechanism shell on the lower beam of the ground-locked rolling shutter door and extends to the lower side of the lock hook, a detection switch installed in the lock hook cover and a signal wireless transmission circuit board installed on the lower beam of the ground-locked rolling shutter door, wherein the signal transmission wire of the detection switch is connected to the signal wireless transmission circuit board, a detection switch mounting groove is provided on the lower outward side of the lock hook cover, a vertical lower through hole is provided on the bottom surface of the detection switch mounting groove, a detection head is provided on the detection switch that is telescopic along the vertical direction, the detection switch is installed in the detection switch mounting groove and its detection head extends downward from the lower through hole to outside the lock hook cover.

[0007] The width of the tactile switch mounting groove of the above technical solution can be greater than the width of the tactile switch, and the tactile switch mounting groove is provided with a transverse positioning hole on the outer side wall in the width direction of the tactile switch, and the tactile switch is provided with a transverse positioning column on the outer side in the width direction of the tactile switch. The tactile switch is installed in the tactile switch mounting groove by fitting the positioning column in the positioning hole and inserting the plug into the inner side surface of the tactile switch in the width direction and the inner side wall of the tactile switch mounting groove in the width direction with a transition fit, so that the tactile switch is fixed in the tactile switch mounting groove, so that the tactile switch can be more stably and reliably installed in the tactile switch mounting groove.

[0008] In the above technical solution, the tactile switch mounting slot may be provided with two positioning holes, and the tactile switch may be provided with two positioning posts corresponding to the two positioning holes.

[0009] The lower through hole of the tactile switch mounting slot in the above technical solution may be a long hole extending along the width direction of the tactile switch mounting slot, so as to facilitate the positioning post on the tactile switch to fit into the positioning hole on the tactile switch mounting slot.

[0010] The main body of the lock hook sheath described in the above technical solution can be in a forked shape with the inner sides of the two legs being open, providing a channel for the left and right lock hooks to swing toward the middle.

[0011] The tactile switch described in the above technical solution can be a direct-acting travel switch or a micro-actuating travel switch.

[0012] The top side of the locking hook sheath in the above technical solution can be connected to a foldable fixing plate, and two screw locking seats are provided on the fixing plate. The fixing plate is fixed to the lower beam by rotating the screws on the lower beam to cooperate with the screw holes of the screw locking seats. The fixing plate is used to hang the locking hook sheath to prevent the locking hook sheath from moving downward and detaching from the locking hook mechanism housing.

[0013] The circuit structure on the signal wireless transmission circuit board described in the above technical solution may include a microcontroller and its peripheral startup circuit, working display circuit, signal transmission circuit, touch switch connection circuit and running program input circuit, and the startup circuit, working display circuit, signal transmission circuit, touch switch connection circuit and running program input circuit are respectively connected to the corresponding I / O terminals of the microcontroller.

[0014] The power supply for the microcontroller, starting circuit, signal transmitting circuit, touch switch connection circuit and running program input circuit described in the above technical solution can be provided by the battery of the signal wireless transmission circuit board, or by the working power supply of the lock hook mechanism on the lower beam of the ground lock type rolling shutter door.

[0015] The microcontroller described in the above technical solution can be an 8-bit 14-pin PIC16F506-I / SL model or a CSU32P10-SOP14 model microcontroller.

[0016] The signal transmission circuit described in the above technical solution can be composed of transistors 1 to 2, a voltage-stabilizing integrated circuit, resistors 1 to 4, capacitors 1 to 3, an inductor and an antenna; wherein one end of resistor 1 is connected to the corresponding I / O terminal of the microcontroller, the other end of resistor 1 is connected to the base of transistor 1, the collector of transistor 1 is connected to the emitter of transistor 2, the emitter of transistor 1 is connected to one end of resistor 2, the other end of resistor 2 is connected to one end of resistor 3, and the other end of resistor 3 is grounded; one path of the base of transistor 2 is connected to one end of the inductor, the other path is connected to one end of capacitor 2 and then to one end of capacitor 3, the other end of capacitor 3 is connected to the antenna, the other end of the inductor is connected to a power supply VCD, the other path is connected to the other end of capacitor 2, the other path is connected to one end of resistor 4, then to the Vin terminal of the voltage-stabilizing integrated circuit, and then to one end of capacitor 1, the other end of capacitor 1 is connected to the +Vo terminal of the voltage-stabilizing integrated circuit, then to the other end of resistor 4, and then to the base of transistor 2, and the GND terminal of the voltage-stabilizing integrated circuit is grounded.

[0017] The beneficial effects of the present invention are as follows: first, a lock hook sheath is sleeved on the outer side of the lock hook mechanism housing on the lower beam of the ground lock type rolling shutter door, and the lock hook sheath extends to the lower sides of the left and right lock hooks, the touch switch is installed in the lock hook sheath, and the touch head vertically telescopic on the touch switch extends downward from the lower through hole of the lock hook sheath to the outside of the lock hook sheath, and a signal wireless transmission circuit board is installed on the lower beam of the ground lock type rolling shutter door, and the signal transmission line of the touch switch is connected to the signal wireless transmission circuit board, so when the ground lock type rolling shutter door is closed, the lower beam moves downward, and when the box cover of the lock hook box is not opened in advance, the touch switch first touches the top surface of the box cover of the lock hook box, and the touch switch will touch The signal is transmitted to the signal wireless transmission circuit board, which is then wirelessly sent to the rolling shutter motor control circuit of the ground-locked rolling shutter door. The rolling shutter motor control circuit can control the rolling shutter motor to stop working, or reverse to control the lower beam of the rolling shutter door to rise. At the same time, an alarm is triggered to remind the user to lift the lid of the lock hook box and then close the door again to ensure the anti-theft safety of the door and protect the electric ground-locked rolling shutter door from damage due to user error. The touch switch is set on the outside of the left and right lock hooks through the lock hook cover, so the touch switch will not affect the normal working action of the left and right lock hooks, nor will it hinder the left and right lock hooks from entering and exiting the lock hook box. The installation structure of the touch switch is ingenious and reasonable. Secondly, since a signal wireless transmission circuit board is provided on the lower beam of the ground-locked rolling shutter door, and the lock hook cover and the tactile switch inside it are also on the lower beam, a wired connection is adopted between the tactile switch and the signal wireless transmission circuit board to simplify the structure of the tactile switch device to the greatest extent. The use of wireless signal transmission in the space between the signal wireless transmission circuit board on the lower beam and the rolling shutter motor control circuit, which has a constantly changing distance, can basically eliminate the failure of the signal transmission line that is easily damaged and ensure the control quality of the ground-locked rolling shutter door.

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a cross-sectional schematic diagram of an embodiment of the present invention.

[0020] Figure 2 yes Figure 1 An enlarged diagram of the shackle cover, tactile switch, and plug separated.

[0021] Figure 3 yes Figure 2 Schematic diagram of the lock hook cover and the touch switch in the direction of A.

[0022] Figure 4 yes Figure 1 Schematic diagram of the circuit structure on the circuit board for wireless signal transmission.

[0023] Figure 5 yes Figure 4A schematic diagram of a circuit principle.

[0024] In the figure: 1. Lower beam; 2. Lock hook mechanism housing; 3. Left and right lock hooks; 4. Lock hook cover; 5. Tactile switch; 6. Signal wireless transmission circuit board; 7. Signal transmission wire; 8. Tactile switch mounting slot; 9. Lower through hole; 10. Tactile head; 11. Width of the Tactile switch mounting slot; 12. Width of the Tactile switch; 13. Positioning hole; 14. Positioning column; 15. Block; 16. Sleeve body; 17. Inner side; 18. Fixing plate; 19. Screw locking seat. DETAILED DESCRIPTION

[0025] Reference Figures 1 to 3 , a detection protection device for the lower part of the lock hook of the local lock type rolling shutter door is characterized in that it includes a lock hook cover 4 that is tightly sleeved on the outside of the lock hook mechanism housing 2 on the lower beam 1 of the ground lock type rolling shutter door and extends to the lower sides of the left and right lock hooks 3, a detection switch 5 installed in the lock hook cover 4 and a signal wireless transmission circuit board 6 installed on the lower beam 1 of the ground lock type rolling shutter door, wherein the signal transmission wire 7 of the detection switch 5 is connected to the signal wireless transmission circuit board 6, a detection switch mounting groove 8 is provided on the lower part of the lock hook cover 4 facing outward, a vertical lower through hole 9 is provided on the bottom surface of the detection switch mounting groove 8, a detection head 10 that is telescopic along the vertical direction is provided on the detection switch 5, the detection switch 5 is installed in the detection switch mounting groove 8 and its detection head 10 extends downward from the lower through hole 9 to the outside of the lock hook cover 4.

[0026] In addition, the width 11 of the tactile switch mounting groove 8 is greater than the width 12 of the tactile switch 5. The tactile switch mounting groove 8 is provided with a transverse positioning hole 13 on the outer side wall in the width direction, and the tactile switch 5 is provided with a transverse positioning post 14 on the outer side surface in the width direction. The tactile switch 5 is installed in the tactile switch mounting groove 8 by the positioning post 14 being engaged with the positioning hole 13 and being inserted with a plug 15 in a transitional fit between the inner side surface of the tactile switch 5 in the width direction and the inner side wall of the tactile switch mounting groove 8 in the width direction, so that the tactile switch 5 is fixed in the tactile switch mounting groove 8, so that the tactile switch 5 can be more firmly and reliably installed in the tactile switch mounting groove 8.

[0027] like Figure 3 As shown, there are two positioning holes 13 on the tactile switch mounting slot 8 , and two positioning posts 14 on the tactile switch 5 are provided to correspond to the two positioning holes 13 .

[0028] The lower through hole 9 of the tactile switch mounting slot 8 is a long hole extending along the width direction of the tactile switch mounting slot 8 .

[0029] The main body 16 of the lock hook sheath 4 is in a forked shape, and the inner side surfaces 17 of the two legs are open, providing a channel for the left and right lock hooks to swing toward the middle.

[0030] The tactile switch 5 is a direct-acting travel switch or a micro-actuating travel switch.

[0031] A foldable fixing plate 18 is connected to the top side of the sleeve body 16 of the locking hook sleeve 4, and two screw locking seats 19 are provided on the fixing plate 18. The fixing plate 18 is fixed to the lower beam 1 by rotating the screws on the lower beam 1 to cooperate with the screw holes of the screw locking seats 19.

[0032] Reference Figure 4 The circuit structure on the signal wireless transmission circuit board 6 includes a microcontroller and its peripheral startup circuit, a working display circuit, a signal transmission circuit, a touch switch connection circuit and a running program input circuit. The startup circuit, the working display circuit, the signal transmission circuit, the touch switch connection circuit and the running program input circuit are respectively connected to the corresponding I / O terminals of the microcontroller.

[0033] The power supply for the microcontroller, starting circuit, signal transmitting circuit, touch switch connection circuit and running program input circuit is provided by the battery of the signal wireless transmission circuit board, or by the working power supply of the lock hook mechanism on the lower beam of the ground lock type rolling shutter door.

[0034] Reference Figure 5 The microcontroller IC1 adopts an 8-bit 14-pin PIC16F506-I / SL model microcontroller, wherein pin 1 of the microcontroller IC1 is a power supply terminal, pin 14 is a ground terminal, and pins 2 to 13 are I / O terminals.

[0035] The signal transmission circuit is composed of transistors T1 to T2, an M7805 voltage regulator integrated circuit IC2, resistors R1 to R4, capacitors C1 to C3, an inductor L and an antenna W; wherein one end of the resistor R1 is connected to the corresponding I / O terminal 6 pin of the microcontroller IC1, the other end of the resistor R1 is connected to the base of the transistor T1, the collector of the transistor T1 is connected to the emitter of the transistor T2, the emitter of the transistor T1 is connected to one end of the resistor R2, the other end of the resistor R2 is connected to one end of the resistor R3, and the other end of the resistor R3 is grounded; One path of the base of the transistor T2 is connected to one end of the inductor L, and the other path is connected to one end of the capacitor C2 and then to one end of the capacitor C3. The other end of the capacitor C3 is connected to the antenna W. The other end of the inductor L is connected to the power supply VCD, another path is connected to the other end of the capacitor C2, and yet another path is connected to one end of the resistor R4, and then to the Vin terminal of the voltage regulator integrated circuit IC2, and then to one end of the capacitor C1. The other end of the capacitor C1 is connected to the +Vo terminal of the voltage regulator integrated circuit IC2, and then to the other end of the resistor R4, and then to the base of the transistor T2. The GND terminal of the voltage regulator integrated circuit IC2 is grounded.

[0036] The startup circuit is composed of a resistor R5 and a switch K1 with elastic return, wherein one end of the resistor R5 is connected to the power supply VCD, the other end of the resistor R5 is connected to the corresponding I / O terminal 11 pin of the microcontroller IC1, and the other end is connected to one end of the switch K1, and the other end of the switch K1 is grounded.

[0037] The working display circuit is composed of a light emitting diode D and a resistor R6, wherein the positive electrode of the light emitting diode D is connected to the corresponding I / O terminal 7 pin of the microcontroller IC1, the negative electrode of the light emitting diode D is connected to one end of the resistor R6, and the other end of the resistor R6 is grounded.

[0038] The touch switch connection circuit is composed of an input interface J1, resistors R7 to R9, and capacitors C4 to C5. Among them, terminal 1 of input interface J1 is connected to the corresponding I / O terminal 3 pin of the microcontroller IC1, and the other terminal is connected to one end of resistor 9 and then to one end of capacitor C5. The other ends of resistor 9 and capacitor C5 are both grounded. Terminal 2 of input interface J1 is connected to one end of resistor R8 and the other terminal is connected to one end of capacitor C4. The other end of resistor R8 is connected to one end of resistor R7, and the other end of resistor R7 is connected to power supply VCD. The other end of capacitor C4 is grounded.

[0039] The running program input circuit is composed of an input interface J2, a resistor R10, a capacitor C6 and a switch K2 with elastic return, wherein terminal 1 of the input interface J2 is connected to the corresponding I / O terminal pin 3 of the microcontroller IC1, terminal 2 of the input interface J2 is connected to the corresponding I / O terminal pin 12 of the microcontroller IC1 on one path, and the other path is connected to one end of the switch K2, one end of the capacitor C6, and one end of the resistor R10, the other end of the switch K2 is connected to the power supply VCD, the other ends of the capacitor C6 and the resistor R10 are both grounded, terminal 3 of the input interface J2 is connected to the corresponding I / O terminal pin 13 of the microcontroller IC1, terminal 4 of the input interface J2 is grounded, and terminal 5 of the input interface J2 is connected to the power supply VCD.

[0040] One pin of the power supply terminal 1 of the microcontroller IC1 is connected to the power supply VCD, and the other pin is connected to one end of the capacitor C7, and the other end of the capacitor C7 is grounded; the 8th, 9th and 10th pins of the microcontroller are all grounded.

[0041] When in use, press the switch K2 on the signal wireless transmission circuit board 6 to start the program input function of the microcontroller IC1, and then input the running program to the microcontroller IC1 from the input interface J2, and the touch protection device under the lock hook of the local lock type rolling shutter door can start working; press the switch K1, and the light-emitting diode D of the working display circuit will light up, indicating that the touch protection device under the lock hook of the local lock type rolling shutter door has entered the working state; when the local lock type rolling shutter door is closed, the lower beam 1 moves downward. When the lid of the lock hook box is forgotten to be opened first, the touch head 15 of the touch switch 5 on the lower beam 1 first contacts the top surface of the lid, and the power supply VCD of the touch switch connection circuit inputs a high level to the I / O terminal 3 pin of the microcontroller IC1 through the resistor R7, the resistor R8, the 2nd terminal of the input interface J1, the touch switch 5, and the 1st terminal of the input interface J1. The microcontroller IC1 controls its I / O terminal 6 pin to input a high level, the transistor T1 of the signal transmitting circuit is turned on, so that the transistor T2 is turned on and the level signal of the power supply VCD is amplified, and then sent from the antenna W to the shutter motor control circuit. The shutter motor control circuit can control the shutter motor to stop working, or reverse to control the lower beam of the shutter door to rise, and at the same time alarm to remind the user to lift the lid of the lock hook box and then close the door again to ensure the security of the portal and protect the electric ground lock type shutter door from damage caused by user error; when the ground lock type shutter door is closed without forgetting to lift the lid of the lock hook box first, the cover body 16 of the lock hook sheath 4 enters the lock hook box with the left and right lock hooks 3, and the detection head 15 of the detection switch 5 is not touched. The left and right lock hooks 3 swing to the middle respectively, buckle the fixed rod in the lock hook box, and the ground lock type shutter door is closed and locked normally.

Claims

1. A protection device for detecting contact below the lock hook of a ground-locked rolling shutter door, characterized by: It includes a lock hook cover that is tightly mounted on the outside of the lock hook mechanism shell on the lower beam of the ground lock type rolling shutter door and extends to the lower side of the lock hook, a touch switch installed in the lock hook cover and a signal wireless transmission circuit board installed on the lower beam of the ground lock type rolling shutter door, wherein the signal transmission wire of the touch switch is connected to the signal wireless transmission circuit board, a touch switch installation groove is provided on the outward side of the lower part of the lock hook cover, a vertical lower through hole is provided on the bottom surface of the touch switch installation groove, a vertically retractable touch head is provided on the touch switch, the touch switch is installed in the touch switch installation groove and its touch head extends downward from the lower through hole to outside the lock hook cover.

2. The protection device for detecting contact below the lock hook of a floor-locked rolling shutter door according to claim 1 is characterized in that: The width of the tactile switch mounting groove is greater than the width of the tactile switch. The tactile switch mounting groove is provided with a transverse positioning hole on an outer side wall in the width direction. The tactile switch is provided with a transverse positioning post on an outer side surface in the width direction. The tactile switch is installed in the tactile switch mounting groove by fitting the positioning post in the positioning hole and inserting a plug with a transition fit between the inner side surface of the tactile switch in the width direction and the inner side wall of the tactile switch mounting groove in the width direction, so that the tactile switch is fixed in the tactile switch mounting groove.

3. The protection device for detecting contact below the lock hook of a floor-locked rolling shutter door according to claim 2, characterized in that: There are two positioning holes on the installation slot of the tactile switch, and two positioning posts on the tactile switch are correspondingly matched with the two positioning holes.

4. The protection device for detecting contact below the lock hook of a floor-locked rolling shutter door according to claim 2 or 3, characterized in that: The lower through hole of the tactile switch installation slot is a long hole extending along the width direction of the tactile switch installation slot.

5. The protection device for detecting contact below the lock hook of a floor-locked rolling shutter door according to claim 1, 2 or 3, characterized in that: The main body of the lock hook sheath is in a forked shape, and the inner sides of the two legs are open, providing channels for the left and right lock hooks to swing toward the middle.

6. The protection device for detecting contact below the lock hook of a floor-locked rolling shutter door according to claim 1, 2 or 3, characterized in that: The top side of the locking hook sheath is connected to a foldable fixing plate, and two screw locking seats are provided on the fixing plate. The fixing plate is fixed to the lower beam by rotating the screws on the lower beam to cooperate with the screw holes of the screw locking seats.

7. The device for detecting and protecting the bottom of the lock hook of a floor-locked rolling shutter door according to claim 1 is characterized in that: The circuit structure on the signal wireless transmission circuit board includes a microcontroller and its peripheral startup circuit, a working display circuit, a signal transmission circuit, a touch switch connection circuit and a running program input circuit. The startup circuit, working display circuit, signal transmission circuit, touch switch connection circuit and running program input circuit are respectively connected to the corresponding I / O terminals of the microcontroller.

8. The device for detecting and protecting the bottom of the lock hook of a floor-locked rolling shutter door according to claim 7 is characterized in that: The power supply for the microcontroller, starting circuit, signal transmitting circuit, touch switch connection circuit and running program input circuit is provided by the battery of the signal wireless transmission circuit board, or by the working power supply of the lock hook mechanism on the lower beam of the ground lock type rolling shutter door.

9. The protection device for detecting contact below the lock hook of a floor-locked rolling shutter door according to claim 7 or 8, characterized in that: The signal transmission circuit is composed of transistors 1 to 2, a voltage-stabilizing integrated circuit, resistors 1 to 4, capacitors 1 to 3, an inductor and an antenna; wherein one end of resistor 1 is connected to the corresponding I / O terminal of the microcontroller, the other end of resistor 1 is connected to the base of transistor 1, the collector of transistor 1 is connected to the emitter of transistor 2, the emitter of transistor 1 is connected to one end of resistor 2, the other end of resistor 2 is connected to one end of resistor 3, and the other end of resistor 3 is grounded; one path of the base of transistor 2 is connected to one end of the inductor, the other path is connected to one end of capacitor 2 and then to one end of capacitor 3, the other end of capacitor 3 is connected to the antenna, the other end of the inductor is connected to a power supply VCD, the other path is connected to the other end of capacitor 2, the other path is connected to one end of resistor 4, then to the Vin terminal of the voltage-stabilizing integrated circuit, then to one end of capacitor 1, the other end of capacitor 1 is connected to the +Vo terminal of the voltage-stabilizing integrated circuit, then to the other end of resistor 4, then to the base of transistor 2, and the GND terminal of the voltage-stabilizing integrated circuit is grounded.

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