Dual-purpose safety door lock device for fireproof door and anti-theft door
By designing a dual-purpose safety lock device for fireproof and anti-theft doors, an energy storage capacitor and a time-delay switch circuit are used to automatically unlock the door after a power outage. This solves the problem that bank fireproof and anti-theft door locks cannot be opened in time during a fire, ensuring unobstructed safe evacuation routes and reducing power consumption.
Patent Information
- Application Number
- CN202520647696.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2026-03-17
- Estimated Expiration
- 2035-04-08
AI Technical Summary
Existing bank fireproof and burglarproof door locks cannot be opened in time during a fire, posing a safety hazard. Furthermore, electronic locks cannot function when the power is off, consume a lot of electricity, and affect the stability of the circuit system.
A dual-purpose safety door lock device for fire doors and burglar doors was designed, comprising a power supply module, a power-on drive module, a power-off drive module, and a motor rotation module. It utilizes an energy storage capacitor and a time-delay switch circuit to achieve automatic unlocking after power failure. Combined with fire alarm linkage and temperature control switch, it ensures rapid unlocking during a fire and low power consumption operation under normal conditions.
It can be quickly unlocked in the event of a fire to ensure that evacuation routes are unobstructed. Its standby power consumption is less than 0.02W, which solves the problem of locks not being able to be opened in time during a fire and reduces power consumption.
Smart Images
Figure CN224002531U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lock technology, and in particular to a dual-purpose safety door lock device for fire doors and burglarproof doors. Background Technology
[0002] Fireproof and burglarproof doors in banking and financial systems are crucial facilities for ensuring financial security, requiring excellent fireproof and burglarproof performance. They must effectively isolate fire and maintain unobstructed evacuation routes in the event of a fire, preventing significant loss of life and property. Simultaneously, the door locks must possess reliable burglarproof capabilities. Currently, bank fireproof and burglarproof doors typically use mechanical locks, requiring manual operation to open, while some use electronic locks, requiring continuous power for opening or closing.
[0003] Existing fireproof and burglarproof door locks in banks have the following shortcomings: In the event of a fire, mechanical locks require a key to open, while electronic locks cannot be opened promptly in the event of a power outage due to a fire. Both can prevent timely evacuation, posing significant safety hazards. Numerous past fire incidents have resulted in serious casualties due to door locks failing to open in time, preventing timely escape.
[0004] Meanwhile, existing access control locks installed on security doors, such as magnetic locks, electric bolt locks, cathode locks, and smart locks, have relatively large inrush currents when working, which greatly affects the stability of the lock's circuit system. In particular, the opening and closing coils of magnetic locks and electric bolt locks require continuous power supply for a long time, resulting in high power consumption and high requirements for power supply and wiring. Uninterrupted power supply is necessary to ensure the normal operation of the lock, and the standby power consumption is also relatively high. Utility Model Content
[0005] The purpose of this utility model is to address the shortcomings in the background technology and provide a dual-purpose safety door lock device for fire doors and burglar doors. This device can be powered independently for use on fire doors, or connected to a general access control controller for burglar doors, or used on the door body of burglar doors and other embedded locks that require access control systems.
[0006] To achieve the above objectives, this utility model provides the following technical solution:
[0007] A dual-purpose safety door lock device for fire doors and burglar doors includes a lock motor for opening and closing, and further includes a power supply module for controlling the DC power supply of the device, an on-state drive power supply module for locking control when the device is normally powered on, an on-state drive module for locking drive when the device is normally powered on, a power-off drive module for unlocking drive when the device is powered off, and a motor rotation module for controlling the forward and reverse rotation of the lock motor for opening and closing.
[0008] The power supply module includes a DC power supply J1, a rectifier diode D1, and a fire-fighting linkage normally closed relay SW1, a normally closed temperature control switch SW2, and a TF metal thermal fuse SW3 connected in series.
[0009] The power-off drive module includes a drive circuit composed of diode D3, energy storage capacitor C7, transistor Q3, transistor Q2, and MOSFET U3. It is used to discharge the energy storage capacitor C3 after the device is powered off, and to provide positive voltage power to the motor steering module through MOSFET U3 to drive the lock motor to unlock.
[0010] The power-on drive module includes a drive resistor R11 and a MOSFET U4; it is used to provide a negative voltage power supply to the motor steering module after the device is powered on, so as to drive the lock motor to lock.
[0011] The power-on drive power module includes a time-delay switch circuit consisting of a timing capacitor C1, a resistor R3, and a transistor Q1, and a power-on negative power supply drive circuit consisting of a MOSFET U1 and a power management chip U2, which is used to provide negative voltage power to the power-on drive module after the device is powered on.
[0012] The motor steering module includes an interface J2 connected to the lock motor. Its input terminal is used to receive the positive voltage from the power-off drive module and the negative voltage from the power-on drive power module, and to control the lock motor to rotate forward and backward to unlock or lock.
[0013] The power supply module is connected to the power-off drive module and the power-on drive module respectively. The power-on drive module is connected to the power-on drive module. The motor steering module is connected to the power-off drive module and the power-on drive module respectively. The output terminal of the interface J2 is connected to the lock motor.
[0014] Furthermore, the timing capacitor C1 of the power-on drive power module is connected to the base of transistor Q1 through resistor R3. The collector of transistor Q1 is connected to the gate of MOSFET U1. The source of MOSFET U1 is connected to the power supply module, and the drain is connected to power management chip U2. The negative voltage output terminal of power management chip U2 is connected to the drain of MOSFET U4 of the power-on drive module.
[0015] The input terminal of the motor steering module's interface J2 is connected to the source of the MOS transistor U4 of the power-on drive module and the drain of the MOS transistor U3 of the power-off drive module, respectively.
[0016] Furthermore, the time during which the power-on drive power module provides a negative voltage supply to the power-on drive module after the device is powered on is the delay time of the delay switch circuit composed of the timing capacitor C1, resistor R3, and transistor Q1 in the power-on drive power module. When the device is normally powered on, utilizing the saturation DC blocking characteristic of the timing capacitor C1, the power supply output of the delay switch circuit is quickly turned off after the lock motor completes locking, and the standby power consumption of the device can be no more than 0.02W.
[0017] Furthermore, the delay time of the delay switch circuit composed of the timing capacitor C1, resistor R3, and transistor Q1 of the power-on drive power module is greater than 0.5s, which can ensure that the lock motor completes the opening and closing operation.
[0018] Furthermore, the energy storage capacitor C7 has a capacitance of not less than 2200uF, and is used to discharge power to the lock motor and complete the unlocking operation after the device is powered off.
[0019] Furthermore, the normally closed temperature control switch SW2 has a trigger temperature of 150°C, and the TF metal thermal fuse SW3 has a melting temperature of 155°C, which are used to cut off the power supply to the power supply module in the event of a fire.
[0020] Furthermore, the normally closed fire alarm relay SW1 is connected to the fire alarm circuit of the fire-fighting equipment. It can trigger the disconnection of the power supply module when a fire occurs, and the power disconnection drive power supply module drives the lock of the fire door or the anti-theft door to unlock.
[0021] Furthermore, the connection method of the lock motor connected to the lock clutch of the security door can be forward rotation for unlocking and reverse rotation for locking, or forward rotation for locking and reverse rotation for unlocking.
[0022] The beneficial effects of this utility model are as follows: The power supply module of this device is equipped with a fire-fighting linkage normally closed relay SW1, a normally closed temperature control switch SW2, and a TF metal thermal fuse SW3 connected in series. This triple power-off protection design ensures that the power supply module can shut off the power supply to the device in the event of a fire. The energy storage capacitor C7 of the power-off drive module is used to power the lock motor in the power-off state, enabling fire doors or security doors to unlock quickly in a fire, ensuring unobstructed evacuation routes during a fire. In the normal power-on state, the time-delay switch circuit formed by the timing capacitor C1 can quickly shut off the power output of the switch circuit after the lock motor completes the locking and unlocking process. The power consumption of the device in standby mode is no more than 0.02W, achieving low power consumption. Attached Figure Description
[0023] Figure 1 This is a circuit diagram of the present invention.
[0024] Figure 2This is a schematic diagram of the power supply module circuit of this utility model;
[0025] Figure 3 This is a schematic diagram of the power-on drive power supply module circuit of this utility model;
[0026] Figure 4 This is a schematic diagram of the power-on drive module circuit of this utility model;
[0027] Figure 5 This is a schematic diagram of the power-off drive module circuit of this utility model;
[0028] Figure 6 This is a circuit diagram of the motor steering module of this utility model. Detailed Implementation
[0029] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.
[0030] like Figure 1-6 As shown, a dual-purpose safety door lock device for fire doors and burglar doors includes a lock motor for opening and closing, a power supply module for controlling the DC power supply of the device, a power-on drive power supply module for locking control when the device is normally powered on, a power-on drive module for locking drive when the device is normally powered on, a power-off drive module for unlocking drive when the device is powered off, and a motor rotation module for controlling the forward and reverse rotation of the lock motor for opening and closing.
[0031] The power supply module includes a DC power supply J1, a rectifier diode D1, and a fire-fighting linkage normally closed relay SW1, a normally closed temperature control switch SW2, and a TF metal thermal fuse SW3 connected in series.
[0032] The power-off drive module includes a drive circuit composed of diode D3, energy storage capacitor C7, transistor Q3, transistor Q2, and MOSFET U3. It is used to discharge the energy storage capacitor C3 after the device is powered off, and to provide positive voltage power to the motor steering module through MOSFET U3 to drive the lock motor to unlock.
[0033] The power-on drive module includes a drive resistor R11 and a MOSFET U4; it is used to provide a negative voltage power supply to the motor steering module after the device is powered on, so as to drive the lock motor to lock.
[0034] The power-on drive power module includes a time-delay switch circuit consisting of a timing capacitor C1, a resistor R3, and a transistor Q1, and a power-on negative power supply drive circuit consisting of a MOSFET U1 and a power management chip U2, which is used to provide negative voltage power to the power-on drive module after the device is powered on.
[0035] The motor steering module includes an interface J2 connected to the lock motor. Its input terminal is used to receive the positive voltage power supply from the power-off drive module and the negative voltage power supply from the power-on drive power module, and to control the lock motor to rotate forward and backward to unlock or lock.
[0036] The power supply module is connected to the power-off drive module and the power-on drive module respectively. The power-on drive module is connected to the power-on drive module. The motor steering module is connected to the power-off drive module and the power-on drive module respectively. The output terminal of the interface J2 is connected to the lock motor.
[0037] In this embodiment, the timing capacitor C1 of the power-on drive power module is connected to the base of transistor Q1 through resistor R3. The collector of transistor Q1 is connected to the gate of MOSFET U1. The source of MOSFET U1 is connected to the power supply module, and the drain is connected to the power management chip U2. The output terminal of the power management chip U2 is connected to the drain of MOSFET U4 of the power-on drive module.
[0038] The input terminal of the motor steering module's interface J2 is connected to the source of the MOS transistor U4 of the power-on drive module and the drain of the MOS transistor U3 of the power-off drive module, respectively.
[0039] The time during which the power-on drive power module provides a negative voltage supply to the power-on drive module after the device is powered on is the delay time of the delay switch circuit composed of the timing capacitor C1, resistor R3, and transistor Q1 in the power-on drive power module. When the device is normally powered on, utilizing the saturation DC blocking characteristic of the timing capacitor C1, the power supply output of the delay switch circuit is quickly cut off after the lock motor completes locking, and the standby power consumption of the device can be no more than 0.02W.
[0040] The delay time of the delay switch circuit composed of the timing capacitor C1, resistor R3, and transistor Q1 in the power-on drive power module is greater than 0.5s, which can ensure that the lock motor completes the locking and unlocking operation.
[0041] The energy storage capacitor C7 has a capacitance of not less than 2200uF and is used to discharge after the device is powered off, providing sufficient positive voltage and current to the lock motor.
[0042] The normally closed temperature control switch SW2 has a trigger temperature of 150°C, and the TF metal thermal fuse SW3 has a melting temperature of 155°C.
[0043] The normally closed fire alarm relay SW1 is connected to the fire alarm circuit of the fire-fighting equipment. It can be triggered to disconnect the power supply module when a fire occurs, and the power-off drive power module drives the lock of the fire door or the anti-theft door to unlock.
[0044] Implementation process, interlocking process: The power supply module provides DC12V power supply. When the power supply passes through the timing capacitor C1 of the power-on drive power supply module, a delay is formed by utilizing the charging and DC blocking characteristics of the capacitor. During the delay time, the delay switch circuit drives the transistor Q1, which briefly turns on the MOSFET U1 to supply power to the power management chip U2. After the power management chip U2 is powered, the peripheral components form a voltage regulation circuit, which outputs a negative voltage during the delay time, providing a short-term negative operating voltage to the lock motor at the back end.
[0045] During the delay time, which is typically designed to be 0.5s to 1.5s, the power management chip U2 provides a negative voltage to the power-on drive module. The drive resistor R11 of the power-on drive module drives the MOS transistor U4 to conduct, and the interface J2 is powered by a negative voltage. The lock motor rotates forward, driving the lock of the fire door or security door to lock.
[0046] Meanwhile, when the power supply module is supplying power normally, the current passes through the diode D3 of the power-off drive power supply module to prevent reverse power supply and charges the energy storage capacitor C7. Since the positive power supply VCC is normally powered, the transistor Q3 is turned on, the transistor Q2 is turned off, the MOSFET U3 is disconnected, and there is no output voltage.
[0047] Unlocking Process: When a fire door or security door is connected to a universal access control controller, the power supply to the power supply module is disconnected through the door lock control module of the access control controller. The power-on drive power supply module stops working and has no negative voltage output. The power-off drive power supply module's transistor Q3 is cut off, the energy storage capacitor C7 discharges to provide power, transistor Q2 conducts, driving MOSFET U3 to conduct and output a positive voltage to power the motor rotation module's interface J2. The lock motor reverses, driving the security door lock to unlock. When the fire door or security door is not using access control or power supply control, the lock can be unlocked using a key.
[0048] There are three modes for quickly opening fire doors and security doors in the event of a fire:
[0049] The fire-fighting equipment immediately sends a fire alarm linkage signal to the normally closed fire linkage relay SW1. After the normally closed fire linkage relay SW1 is triggered, it disconnects and cuts off the power supply module. The device then enters the above-mentioned unlocking process to drive the lock of the fire door or security door to unlock.
[0050] When the temperature reaches 150℃, the normally closed temperature control switch SW2 is triggered and disconnected, cutting off the power supply module. The device then enters the unlocking process described above, driving the fire door or security door lock to unlock.
[0051] When the temperature reaches 155℃, the TF metal thermal fuse SW3 melts, cutting off the power supply to the power supply module, and the device enters the above-mentioned unlocking process, driving the fire door or security door lock to unlock.
[0052] The connection between the lock motor and the safety door lock clutch can be either forward rotation for unlocking and reverse rotation for locking, or forward rotation for locking and reverse rotation for unlocking, and the wiring connection can be adjusted according to actual needs.
Claims
1. A dual-purpose security door lock device for fireproof door and security door, comprising a lock motor for opening and closing the lock, characterized in that, Further comprising, a power supply module for device DC power on-off control, a power-on driving power supply module for locking control in the device normal power-on state, a power-on driving module for locking driving in the device normal power-on state, a power-off driving module for unlocking driving in the device power-off state, a motor steering module for forward and reverse locking control of the lock motor; The power supply module comprises a DC power supply J1, a rectifier diode D1, and a fire linkage normally closed relay SW1, a normally closed temperature control switch SW2, and a TF metal thermal fuse SW3 connected in series. The power-off driving module comprises a diode D3, an energy storage capacitor C7, a driving circuit composed of a triode Q3, a triode Q2, and a MOS tube U3, which is used to discharge the energy storage capacitor C3 after the device is powered off, and provide positive voltage power supply to the motor steering module through the MOS tube U3 to drive the lock motor to unlock. The power-on driving module comprises a driving resistor R11 and a MOS tube U4, which is used to provide negative voltage power supply to the motor steering module after the device is powered on to drive the lock motor to lock. The power-on driving power supply module comprises a timing capacitor C1, a resistor R3, a triode Q1, a power-on negative power supply driving circuit composed of a MOS tube U1 and a power management chip U2, which is used to provide negative voltage power supply to the power-on driving module after the device is powered on. The motor steering module comprises an interface J2 connected with the lock motor, which is used to receive positive voltage power supply from the power-off driving module and negative voltage power supply from the power-on driving power supply module, and control the lock motor to rotate forward and reverse to unlock or lock. The power supply module is connected with the power-off driving module and the power-on driving power supply module, the power-on driving power supply module is connected with the power-on driving module, the motor steering module is connected with the power-off driving module and the power-on driving module, and the output end of the interface J2 is connected with the lock motor.
2. The dual security door lock device of claim 1, wherein, The timing capacitor C1 of the power-on driving power supply module is connected with the base of the triode Q1 through the resistor R3, the collector of the triode Q1 is connected with the gate of the MOS tube U1, the source of the MOS tube U1 is connected with the power supply module, and the drain is connected with the power management chip U2. The input end of the interface J2 of the motor steering module is connected with the source of the MOS tube U4 of the power-on driving module and the drain of the MOS tube U3 of the power-off driving module.
3. The dual security door lock device of claim 1, wherein, The power supply time of the power-on driving power supply module to provide negative voltage to the power-on driving module after the device is powered on is the delay time of the delay switch circuit composed of the timing capacitor C1, the resistor R3, and the triode Q1.
4. The dual security door lock device of claim 1, wherein, The delay time of the delay switch circuit composed of the timing capacitor C1, the resistor R3, and the triode Q1 of the power-on driving power supply module is greater than 0.5s.
5. The dual security door lock device of claim 1, wherein, The capacitance of the energy storage capacitor C7 is not less than 2200uF.
6. The dual security door lock device of claim 1, wherein, The trigger temperature value of the normally closed temperature control switch SW2 is 150 DEG C, and the melting temperature value of the TF metal thermal fuse SW3 is 155 DEG C.
7. The dual security door lock device of claim 1, wherein, The fire alarm circuit of the fire-fighting linkage normally closed relay SW1 is connected with a fire-fighting equipment.
8. The dual security door lock device of claim 1 to 7, wherein, The lock motor connected with the lock clutch of the safety door can be connected in a positive rotation unlocking, reverse rotation locking mode, or a positive rotation locking, reverse rotation unlocking mode.