Door lock protection device and door lock control system

Abstract

The utility model provides a door lock protection device and a door lock control system, and relates to the technical field of door locks, the door lock protection device comprises a door lock relay, a first suppressor and a second suppression assembly, the door lock, the power supply, the door lock relay and the first suppressor are annularly connected, the first suppressor is connected with a common end of the door lock relay and the first target device, the first target device comprises the door lock or the power supply, and the door lock is connected with the power supply; the second restraining assembly is connected with the releasing target and the door lock; the first suppressor and the second suppression assembly are used for providing a backflow path for surge current generated by the power supply; the second suppression assembly and the discharge target are used for providing a discharge path for surge voltage generated by the door lock. According to the utility model, a contact coating in the door lock relay can be prevented from being damaged by surge voltage and surge current, and the service life of the door lock relay is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of door locks, in particular to a door lock protection device and a door lock control system. Background Art

[0002] Currently, door lock control circuits are implemented using transistor-driven relays. The relay has three terminals: a common terminal (COM), a normally open terminal (NO), and a normally closed terminal (NC). The transistor's drive state switches the common terminal's connection state between the normally open terminal (NO) and the normally closed terminal (NC). For example, when not driven, the common terminal (COM) is connected to the normally closed terminal (NC) and disconnected from the normally open terminal (NO). When driven, the common terminal (COM) is connected to the normally open terminal (NO) and disconnected from the normally closed terminal (NC). Switching the relay's connection state generates surge voltage in the door lock and surge current in the power supply. While the relay's inherent properties allow it to withstand short-term surge currents and voltages, frequent surges can damage the relay's contact plating, causing the contacts to stick and become inoperable. This can disrupt the door lock's proper operation and pose a safety hazard. Utility Model Content

[0003] The utility model provides a door lock protection device and a door lock control system, which are used to solve the defect in the prior art that frequent surge current and surge voltage will damage the contact plating at each end of the relay, causing the contacts at each end to stick and be unable to move, making the door lock unable to work normally, and posing certain safety hazards.

[0004] The utility model provides a door lock protection device, comprising: a door lock relay, a first suppressor and a second suppressor assembly;

[0005] The door lock, the power supply, the door lock relay and the first suppressor are connected in a ring shape, the first suppressor is respectively connected to the common end of the door lock relay and a first target device, the first target device includes the door lock or the power supply, and the door lock is connected to the power supply;

[0006] The second suppression component is respectively connected to the discharge target and the door lock;

[0007] The first suppressor and the second suppression component are used to provide a return path for the surge current generated by the power supply; the second suppression component and the discharge target are used to provide a discharge path for the surge voltage generated by the door lock.

[0008] According to the door lock protection device provided by the present invention, the second suppression component includes a second suppressor, or a second suppressor and a third suppressor;

[0009] In the case where the second suppression component includes only the second suppressor, the first suppressor and the second suppressor are used to provide a return path for the surge current generated by the power supply, and the second suppressor and the discharge target are used to provide a discharge path for the surge voltage generated by the door lock;

[0010] When the second suppression component includes the second suppressor and the third suppressor, the first suppressor and the second suppressor are used to provide a return path for the surge current generated by the power supply, and the third suppressor and the discharge target are used to provide a discharge path for the surge voltage generated by the door lock.

[0011] According to the door lock protection device provided by the present invention, when the second suppression component only includes the second suppressor, the first end of the second suppressor is respectively connected to the positive pole of the power supply and the first end of the first suppressor, the negative pole of the power supply is connected to the negative pole of the door lock, and the second end of the second suppressor is respectively connected to the first target end of the door lock relay and the positive pole of the door lock, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay.

[0012] According to the door lock protection device provided by the present invention, when the second suppression assembly includes the second suppressor and the third suppressor, the first end of the second suppressor is respectively connected to the positive electrode of the power supply and the first end of the first suppressor, the negative electrode of the power supply is connected to the negative electrode of the door lock, and the second end of the second suppressor is respectively connected to the first target end of the door lock relay and the positive electrode of the door lock, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay;

[0013] A first end of the third suppressor is connected to the positive electrode of the door lock and the first target end of the door lock relay respectively, and a second end of the third suppressor is connected to the ground end.

[0014] According to the door lock protection device provided by the present invention, when the second suppression assembly includes the second suppressor and the third suppressor, the first end of the second suppressor is respectively connected to the negative electrode of the power supply and the first end of the first suppressor, the positive electrode of the power supply is connected to the positive electrode of the door lock, and the second end of the second suppressor is respectively connected to the first target end of the door lock relay and the negative electrode of the door lock, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay;

[0015] A first end of the third suppressor is connected to the negative electrode of the door lock and the first target end of the door lock relay respectively, and a second end of the third suppressor is connected to the ground end.

[0016] According to the door lock protection device provided by the present invention, when the second suppression component includes the second suppressor and the third suppressor, the first end of the second suppressor, the negative pole of the door lock, the first end of the first suppressor and the first end of the third suppressor are connected, the positive pole of the door lock is connected to the positive pole of the power supply, and the second end of the second suppressor is respectively connected to the first target end of the door lock relay and the negative pole of the power supply, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay; the second end of the third suppressor is connected to the ground end.

[0017] According to the door lock protection device provided by the present invention, when the second suppression component includes the second suppressor and the third suppressor, the first end of the second suppressor, the positive pole of the door lock, the first end of the first suppressor and the first end of the third suppressor are connected, the negative pole of the door lock is connected to the negative pole of the power supply, and the second end of the second suppressor is respectively connected to the first target end of the door lock relay and the positive pole of the power supply, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay; the second end of the third suppressor is connected to the ground end.

[0018] The door lock protection device provided by the present invention further includes a suppression capacitor, which is connected in parallel with the second suppressor.

[0019] According to the door lock protection device provided by the present invention, the common end of the door lock relay is connected to the first target end.

[0020] The present invention further provides a door lock control system, comprising: a door lock, a power supply and a door lock protection device as described in any one of the above items, wherein the door lock, the power supply and the door lock protection device are connected in a ring shape.

[0021] The door lock protection device and door lock control system provided by the present invention are ring-connected in which the door lock, power supply, door lock relay and first suppressor are respectively connected. The first suppressor is respectively connected to the common end of the door lock relay and the first target device. The first target device includes a door lock or a power supply, and the door lock is connected to the power supply. The second suppression component is respectively connected to the discharge target and the door lock. After the power supply generates a surge current, the first suppressor and the second suppression component provide a return path for the surge current to prevent the surge current from flowing through the door lock relay and damaging the contact plating. After the door lock generates a surge voltage, the surge voltage can be discharged to the discharge target through the discharge path formed by the second suppression component, to prevent the surge voltage from damaging the contact plating in the door lock relay, thereby greatly extending the service life of the door lock relay. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is one of the connection diagrams of the door lock protection device provided in an embodiment of the present utility model.

[0024] Figure 2 This is a waveform diagram of the surge voltage provided by an embodiment of the present utility model.

[0025] Figure 3 This is a waveform diagram of the surge current provided by an embodiment of the present utility model.

[0026] Figure 4 This is the second connection diagram of the door lock protection device provided by the embodiment of the present utility model.

[0027] Figure 5 This is the third connection diagram of the door lock protection device provided by the embodiment of the present utility model.

[0028] Figure 6 This is the fourth connection diagram of the door lock protection device provided by the embodiment of the present utility model.

[0029] Figure 7 This is the fifth connection diagram of the door lock protection device provided by the embodiment of the present utility model.

[0030] Figure 8 This is the sixth connection diagram of the door lock protection device provided by the embodiment of the present utility model.

[0031] Figure 9 This is the seventh connection diagram of the door lock protection device provided in the embodiment of the present utility model.

[0032] Figure 10 This is the eighth connection diagram of the door lock protection device provided by the embodiment of the present utility model.

[0033] Figure 11 This is the ninth connection diagram of the door lock protection device provided in the embodiment of the present utility model.

[0034] Figure 12 This is the tenth connection diagram of the door lock protection device provided by the embodiment of the present utility model.

[0035] Figure 13 This is the eleventh connection diagram of the door lock protection device provided in the embodiment of the present utility model.

[0036] Figure 14 This is a voltage waveform diagram of the door lock relay provided by the embodiment of the present utility model when it vibrates.

[0037] Figure 15 This is the twelfth connection diagram of the door lock protection device provided in an embodiment of the present utility model.

[0038] Reference numerals:

[0039] 100: Door lock protection device; 110: Door lock relay; 120: First suppressor; 130: Second suppression assembly; 131: Second suppressor; 132: Third suppressor; 200: Door lock; 300: Power supply; 400: Discharge target. DETAILED DESCRIPTION

[0040] To make the purpose, technical solutions, and advantages of the present invention more clear, the following will be combined with the accompanying drawings to clearly and completely describe the technical solutions of the present invention. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] In order to solve the problem in the prior art that frequent surge currents and surge voltages can damage the contact plating at each end of the relay, causing the contacts at each end to stick and become unable to operate, thus preventing the door lock from operating normally and posing certain safety hazards, the present invention provides a door lock protection device. The door lock protection device 100 includes: a door lock relay 110, a first suppressor 120, and a second suppression assembly 130;

[0042] The door lock 200, the power supply 300, the door lock relay 110 and the first suppressor 120 are connected in a ring shape. The first suppressor 120 is respectively connected to the common terminal COM of the door lock relay 110 and the first target device, the first target device includes the door lock 200 or the power supply 300, and the door lock 200 is connected to the power supply 300;

[0043] The second suppression assembly 130 is connected to the discharge target 400 and the door lock 200 respectively;

[0044] The first suppressor 120 and the second suppressor component 130 are used to provide a return path for the surge current generated by the power supply 300 ; the second suppressor component 130 and the discharge target 400 are used to provide a discharge path for the surge voltage generated by the door lock 200 .

[0045] Specifically, in the embodiment of the present invention, the first suppressor 120 is connected in series in the ring connection path of the door lock 200, the power supply 300 and the door lock relay 110, forming a ring connection between the door lock 200, the power supply 300, the door lock relay 110 and the first suppressor 120, and the second end of the first suppressor 120 is connected to the common end COM of the door lock relay 110, and the first end of the first suppressor 120 is connected to the door lock 200 or the power supply 300. The door lock 200 and the power supply 300 are connected, thereby limiting the first target end of the door lock relay 110 to be connected to the power supply 300 or the door lock 200. For example, Figure 1 This is one of the connection diagrams of the door lock protection device provided by the embodiment of the present utility model, such as Figure 1 As shown, when the first end of the first suppressor 120 is connected to the power source 300, the first target end of the door lock relay 110 is connected to the door lock 200. Alternatively, when the first end of the first suppressor 120 is connected to the door lock 200, the first target end of the door lock relay 110 is connected to the power source 300. Furthermore, in this embodiment of the present invention, a second suppressor component 130 is provided, with its two ends connected to the door lock 200 and the discharge target 400, respectively. When the power source 300 generates a surge current, the first suppressor 120 limits the surge current. Combined with the second suppressor component 130, it provides a return path for the surge current, preventing the surge current from flowing through the door lock relay 110 and damaging the contact plating therein. When a surge voltage is generated in the door lock 200, the surge voltage can be discharged to the discharge target 400 through the second suppressor component 130, preventing the surge voltage from damaging the door lock relay 110.

[0046] It should be noted that the door lock relay 110 includes a common terminal COM, a normally open terminal NO, and a normally closed terminal NC, and the first target terminal includes either the normally open terminal NO or the normally closed terminal NC. The common terminal COM of the door lock relay 110 is connected to the first target terminal. The door lock relay 110 functions as a switch for the door lock 200. Specifically, the connection state of the common terminal COM with the normally open terminal NO and the normally closed terminal NC, respectively, in the door lock relay 110 determines the on / off state of the door lock 200. Depending on the type of door lock relay 110, the connection state of the common terminal COM with the normally open terminal NO and the normally closed terminal NC, respectively, indicates different on / off states of the door lock 200. For example, in a first type of door lock relay 110, the door lock 200 is closed when the common terminal COM is connected to the normally closed terminal NC, and is opened when the common terminal COM is connected to the normally open terminal NO. In a second type of door lock relay 110, the door lock 200 is closed when the common terminal COM is connected to the normally open terminal NO, and is opened when the common terminal COM is connected to the normally closed terminal NC.

[0047] It should be noted that if Figure 1 As shown, the discharge target 400 includes the power supply 300 or the ground terminal GND. After the door lock 200 generates a surge voltage, the second suppression component 130 can discharge the surge voltage to the power supply 300 or the ground terminal GND. The specific discharge to the power supply 300 or the ground terminal GND depends on the number of suppressors included in the second suppression component 130.

[0048] It should be noted that Figure 2 This is a waveform diagram of the surge voltage provided by the embodiment of the present utility model, such as Figure 2 As shown, when the power supply 300 is disconnected, a large reverse voltage will be generated due to the characteristics of the door lock 200 itself, that is, Figure 2 The voltage on the negative half of the voltage axis shown in FIG is a reverse voltage, which is a surge voltage. This surge voltage can damage the contact plating of the door lock relay 110, causing the door lock relay 110 to fail to operate, thereby preventing the door lock 200 from switching between on and off states, i.e., the door lock 200 cannot be opened or closed.

[0049] It should be noted that Figure 3 This is a waveform diagram of the surge current provided by the embodiment of the present utility model, such as Figure 3 As shown, when the power supply 300 is closed, due to the characteristics of the door lock 200 itself, the power supply 300 will generate a large forward current, that is, Figure 3 The current in the positive half of the current axis shown in FIG is the surge current. The surge current can also damage the contact plating of the door lock relay 110, causing the door lock relay 110 to fail to operate.

[0050] Optionally, the first suppressor 120 may be a PTC (Positive Temperature Coefficient) thermistor or other type of resistor, which is not limited in this embodiment of the present invention. When the power supply 300 generates a positive inrush current, the first suppressor 120 can limit the inrush current, minimizing damage to the door lock relay 110.

[0051] Further, the second suppression assembly 130 includes a second suppressor 131 , or the second suppressor 131 and a third suppressor 132 ;

[0052] In the case where the second suppression component 130 includes only the second suppressor 131 , the first suppressor 120 and the second suppressor 131 are used to provide a return path for the surge current generated by the power supply 300 , and the second suppressor 131 and the discharge target 400 are used to provide a discharge path for the surge voltage generated by the door lock 200 ;

[0053] When the second suppression component 130 includes a second suppressor 131 and a third suppressor 132, the first suppressor 120 and the second suppressor 131 are used to provide a return path for the surge current generated by the power supply 300, and the third suppressor 132 and the discharge target 400 are used to provide a discharge path for the surge voltage generated by the door lock 200.

[0054] It should be noted that when the second suppression component 130 includes only the second suppressor 131, the discharge target 400 is the power supply 300. When the second suppression component 130 includes the second suppressor 131 and the third suppressor 132, the discharge target 400 is the ground terminal GND.

[0055] Specifically, when the second suppression assembly 130 includes only the second suppressor 131, the surge current generated by the power supply 300 can flow back through the first suppressor 120 and the second suppressor 131, while the surge voltage generated by the door lock 200 can be discharged to the power supply 300 through the second suppressor 131. When the second suppression assembly 130 includes the second suppressor 131 and the third suppressor 132, the surge current generated by the power supply 300 still flows back through the first suppressor 120 and the second suppressor 131, but the surge voltage generated by the door lock 200 is discharged to the ground terminal GND through the third suppressor 132.

[0056] Further, in the case where the second suppression component 130 only includes the second suppressor 131, the first end of the second suppressor 131 is respectively connected to the positive pole of the power supply 300 and the first end of the first suppressor 120, the negative pole of the power supply 300 is connected to the negative pole of the door lock 200, and the second end of the second suppressor 131 is respectively connected to the first target end of the door lock relay 110 and the positive pole of the door lock 200, the first target end includes the normally closed end NC or the normally open end NO of the door lock relay 110, and the first target end is determined based on the type of the door lock relay 110.

[0057] For example, Figure 4 This is the second connection diagram of the door lock protection device provided by the embodiment of the present utility model, such as Figure 4 As shown, when the door lock relay 110 is of the first type, the first end of the second suppressor 131 is connected to the positive electrode of the power supply 300 and the first end of the first suppressor 120, respectively. The second end of the second suppressor 131 is connected to the normally closed terminal NC of the door lock relay 110 and the positive electrode of the door lock 200, respectively. When the power supply 300 is disconnected, the door lock 200 generates a reverse surge voltage that acts on the normally closed terminal NC. In this case, the reverse surge voltage can be discharged to the power supply 300 through the second suppressor 131. When the power supply 300 is closed, the power supply 300 generates a forward surge current that also acts on the normally closed terminal NC. In this case, the first suppressor 120 can limit this surge current. In this case, the second suppressor 131 is not turned on. Until the first suppressor 120 reaches the current limiting limit, the voltage divider across the first suppressor 120 and the door lock relay 110 increases due to the surge current, that is, the voltage divider across the parallel second suppressor 131 also increases, thereby turning on the second suppressor 131. At this time, the first suppressor 120 and the door lock relay 110 are short-circuited by the second suppressor 131, and the surge current can flow back through the second suppressor 131, avoiding flowing through the door lock relay 110 and damaging the contact plating of the common terminal COM and the normally closed terminal NC in the door lock relay 110.

[0058] For example, Figure 5 This is the third connection diagram of the door lock protection device provided by the embodiment of the present utility model, as shown in FIG. Figure 5 As shown, when the door lock relay 110 is of the second type, Figure 4 The door lock protection device shown here differs in that a second suppressor 131 is connected in parallel between the first terminal of the first suppressor 120 and the normally open terminal (NO) of the door lock relay 110. The surge voltage generated by the door lock 200 and the surge current generated by the power supply 300 both act on the normally open terminal (NO) of the door lock relay 110. The first suppressor 120 and the second suppressor 131 prevent damage to the contact plating of the common terminal COM and the normally open terminal (NO) of the door lock relay 110.

[0059] It should be noted that the second suppressor 131 may be a TVS (Transient Voltage Suppressor) or a TSS (Thyristor Surge Suppressors).

[0060] Furthermore, in the case where the second suppression assembly 130 includes a second suppressor 131 and a third suppressor 132, a first end of the second suppressor 131 is connected to the positive electrode of the power supply 300 and the first end of the first suppressor 120, respectively, a negative electrode of the power supply 300 is connected to the negative electrode of the door lock 200, and a second end of the second suppressor 131 is connected to a first target terminal of the door lock relay 110 and the positive electrode of the door lock 200, respectively, the first target terminal includes the normally closed terminal NC or the normally open terminal NO of the door lock relay 110, and the first target terminal is determined based on the type of the door lock relay 110;

[0061] A first end of the third suppressor 132 is connected to the positive electrode of the door lock 200 and the first target end of the door lock relay 110 , respectively. A second end of the third suppressor 132 is connected to the ground end GND.

[0062] For example, Figure 6 This is the fourth connection diagram of the door lock protection device provided by the embodiment of the present utility model, as shown in FIG. Figure 6 As shown, when the door lock relay 110 is of the first type, the second suppressor 131 in the second suppression assembly 130 is connected in parallel between the first suppressor 120 and the normally closed terminal NC of the door lock relay 110. The third suppressor 132 in the second suppression assembly 130 has a first end connected to the normally closed terminal NC of the door lock relay 110, and a second end connected to the ground terminal GND. When the power supply 300 generates a surge current, the first suppressor 120 and the second suppressor 131 provide a return path for the surge current, preventing the surge current from acting on the common terminal COM and the normally closed terminal NC of the door lock relay 110. The specific operating principle is the same as described above and will not be further described in detail in the embodiments of the present invention. When the door lock 200 generates a surge voltage, the third suppressor 132 discharges the surge voltage to the ground terminal GND, preventing the surge voltage from acting on the normally closed terminal NC of the door lock relay 110.

[0063] For example, Figure 7 This is the fifth connection diagram of the door lock protection device provided by the embodiment of the present utility model, such as Figure 7 As shown, when the door lock relay 110 is of the second type, Figure 6The door lock protection device shown differs in that a second suppressor 131 is connected in parallel between the first terminal of the first suppressor 120 and the normally open terminal (NO) of the door lock relay 110. The surge voltage generated by the door lock 200 and the surge current generated by the power supply 300 both act on the normally open terminal (NO) of the door lock relay 110. The first suppressor 120, the second suppressor 131, and the third suppressor 132 prevent damage to the contact plating of the common terminal COM and the normally open terminal (NO) of the door lock relay 110.

[0064] It should be noted that the third suppressor 132 may be a TVS (Transient Voltage Suppressor) or a TSS (Thyristor Surge Suppressors).

[0065] Furthermore, in the case where the second suppression assembly 130 includes a second suppressor 131 and a third suppressor 132, a first end of the second suppressor 131 is connected to the negative electrode of the power supply 300 and the first end of the first suppressor 120, respectively, a positive electrode of the power supply 300 is connected to the positive electrode of the door lock 200, and a second end of the second suppressor 131 is connected to a first target terminal of the door lock relay 110 and the negative electrode of the door lock 200, respectively, the first target terminal includes the normally closed terminal NC or the normally open terminal NO of the door lock relay 110, and the first target terminal is determined based on the type of the door lock relay 110;

[0066] A first end of the third suppressor 132 is connected to the cathode of the door lock 200 and the first target end of the door lock relay 110 , respectively. A second end of the third suppressor 132 is connected to the ground end GND.

[0067] For example, Figure 8 This is the sixth connection diagram of the door lock protection device provided by the embodiment of the present utility model, such as Figure 8 As shown, when the door lock relay 110 is of the first type, Figure 6 The difference between the door lock protection device shown is that the connection method of the power supply 300 and the door lock 200 is different. The specific working principle is the same as above, and the embodiment of the utility model will not be repeated here.

[0068] For example, Figure 9 This is the seventh connection diagram of the door lock protection device provided by the embodiment of the present utility model, as shown in FIG. Figure 9 As shown, when the door lock relay 110 is of the second type, Figure 7 The difference between the door lock protection device shown is that the connection method of the power supply 300 and the door lock 200 is different. The specific working principle is the same as above, and the embodiment of the utility model will not be repeated here.

[0069] Further, in the case where the second suppression component 130 includes a second suppressor 131 and a third suppressor 132, the first end of the second suppressor 131, the negative pole of the door lock 200, the first end of the first suppressor 120 and the first end of the third suppressor 132 are connected, the positive pole of the door lock 200 is connected to the positive pole of the power supply 300, and the second end of the second suppressor 131 is respectively connected to the first target end of the door lock relay 110 and the negative pole of the power supply 300, the first target end includes the normally closed end NC or the normally open end NO of the door lock relay 110, and the first target end is determined based on the type of the door lock relay 110; the second end of the third suppressor 132 is connected to the ground end GND.

[0070] For example, Figure 10 This is the eighth connection diagram of the door lock protection device provided by the embodiment of the present utility model, as shown in FIG. Figure 10 As shown, when the door lock relay 110 is of the first type, Figure 6 The door lock protection device shown here differs in that the power supply 300 and the terminals of the door lock 200 are connected differently, and the first terminal of the third suppressor 132 is connected to the negative terminal of the door lock 200, allowing the surge voltage to be discharged directly to the ground terminal GND along the third suppressor 132, thereby preventing it from affecting the door lock relay 110. The specific operating principle is the same as described above, and the present embodiment will not be repeated here.

[0071] For example, Figure 11 This is the ninth connection diagram of the door lock protection device provided by the embodiment of the present utility model. Figure 11 As shown, when the door lock relay 110 is of the second type, Figure 7 The door lock protection device shown here differs in that the power supply 300 and the terminals of the door lock 200 are connected differently, and the first terminal of the third suppressor 132 is connected to the negative terminal of the door lock 200, allowing the surge voltage to be discharged directly to the ground terminal GND along the third suppressor 132, thereby preventing it from affecting the door lock relay 110. The specific operating principle is the same as described above, and the present embodiment will not be repeated here.

[0072] Further, in the case where the second suppression component 130 includes a second suppressor 131 and a third suppressor 132, the first end of the second suppressor 131, the positive pole of the door lock 200, the first end of the first suppressor 120 and the first end of the third suppressor 132 are connected, the negative pole of the door lock 200 is connected to the negative pole of the power supply 300, and the second end of the second suppressor 131 is respectively connected to the first target end of the door lock relay 110 and the positive pole of the power supply 300, the first target end includes the normally closed end NC or the normally open end NO of the door lock relay 110, and the first target end is determined based on the type of the door lock relay 110; the second end of the third suppressor 132 is connected to the ground end GND.

[0073] For example, Figure 12 This is a tenth connection diagram of the door lock protection device provided by the embodiment of the present utility model, as shown in FIG. Figure 12 As shown, when the door lock relay 110 is of the first type, Figure 10 The difference between the door lock protection device shown is that the connection method of the power supply 300 and the door lock 200 is different. The specific working principle is the same as above, and the embodiment of the utility model will not be repeated here.

[0074] For example, Figure 13 This is the eleventh connection diagram of the door lock protection device provided by the embodiment of the present utility model, as shown in FIG. Figure 13 As shown, when the door lock relay 110 is of the second type, Figure 11 The difference between the door lock protection device shown is that the connection method of the power supply 300 and the door lock 200 is different. The specific working principle is the same as above, and the embodiment of the utility model will not be repeated here.

[0075] Furthermore, the door lock protection device 100 further includes a suppression capacitor C, which is connected in parallel to the second suppressor 131 .

[0076] Specifically, when the door lock relay 110 vibrates, the contact states of the contacts at each end of the door lock relay 110 frequently change, causing the internal resistance inside the door lock relay 110 to change, thereby causing the voltage across the door lock relay 110 to change rapidly. Figure 14 This is a voltage waveform diagram of the door lock relay 110 when it vibrates according to an embodiment of the present invention. Figure 14 As shown, when the door lock relay 110 vibrates, the voltage across the door lock relay 110 fluctuates. That is, the voltage across the door lock relay 110 fluctuates. Because the door lock 200 and the door lock relay 110 are connected in series, the voltage across the door lock 200 also fluctuates. When the voltage across the door lock relay 110 decreases rapidly, the voltage across the door lock 200 increases rapidly. The voltage across the door lock 200 remains above the rated value, allowing the door lock 200 to maintain its current on / off state. However, when the voltage across the door lock relay 110 increases rapidly, the voltage across the door lock 200 decreases rapidly. When the voltage across the door lock relay 110 falls below the rated value, the door lock 200 cannot maintain its current on / off state and may malfunction. That is, the door lock 200 may switch from an open state to a closed state, or vice versa, posing a safety risk. Therefore, in the embodiment of the present invention, a suppression capacitor C is connected in parallel at both ends of the second suppressor 131. The voltage change caused by vibration is absorbed by charging and discharging of the suppression capacitor C, thereby preventing the door lock 200 from malfunctioning.

[0077] For example, Figure 15This is a twelfth schematic diagram of the connection of the door lock protection device provided by the embodiment of the present utility model, as shown in FIG. Figure 15 As shown, in Figure 6 On the basis of the door lock protection device shown, a suppression capacitor C is connected in parallel at both ends of the second suppressor 131. When the voltage across the door lock relay 110 decreases and the voltage divider across the door lock 200 increases, the power supply 300 charges the suppression capacitor C. When the voltage across the door lock relay 110 increases and the voltage divider across the door lock 200 decreases, the suppression capacitor C discharges the door lock 200. When the voltage across the door lock relay 110 increases, the suppression capacitor C can absorb part of the increased voltage, suppress the increasing trend of the voltage across the door lock relay 110, and at the same time, suppress the decreasing trend of the voltage divider across the door lock 200, thereby absorbing the voltage changes caused by vibration, preventing the door lock 200 from malfunctioning, and thereby improving the safety of the door lock relay 110.

[0078] The door lock protection device provided by the embodiment of the present invention is a ring-shaped connection of the door lock 200, the power supply 300, the door lock relay 110 and the first suppressor 120. The first suppressor 120 is respectively connected to the common terminal COM of the door lock relay 110 and the first target device. The first target device includes the door lock 200 or the power supply 300, and the door lock 200 is connected to the power supply 300. The second suppression component 130 is respectively connected to the discharge target 400 and the door lock 200. After the power supply 300 generates a surge current, the first suppressor 120 and the second suppression component 130 provide a return path for the surge current to prevent the surge current from flowing through the door lock relay 110 and damaging the contact plating. After the door lock 200 generates a surge voltage, the surge voltage can be discharged to the discharge target 400 through the discharge path formed by the second suppression component 130, to prevent the surge voltage from damaging the contact plating in the door lock relay 110, thereby greatly extending the service life of the door lock relay 110.

[0079] An embodiment of the present invention further provides a door lock control system, comprising: a door lock, a power supply, and a door lock protection device as described above, wherein the door lock, the power supply, and the door lock protection device are connected in a ring shape.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A door lock protection device, characterized in that: include: door lock relay, first suppressor, and second suppressor assembly; The door lock, the power supply, the door lock relay and the first suppressor are connected in a ring shape, the first suppressor is respectively connected to the common end of the door lock relay and a first target device, the first target device includes the door lock or the power supply, and the door lock is connected to the power supply; The second suppression component is respectively connected to the discharge target and the door lock; The first suppressor and the second suppression component are used to provide a return path for the surge current generated by the power supply; the second suppression component and the discharge target are used to provide a discharge path for the surge voltage generated by the door lock.

2. The door lock protection device according to claim 1, characterized in that: The second suppression assembly includes a second suppressor, or a second suppressor and a third suppressor; In the case where the second suppression component includes only the second suppressor, the first suppressor and the second suppressor are used to provide a return path for the surge current generated by the power supply, and the second suppressor and the discharge target are used to provide a discharge path for the surge voltage generated by the door lock; When the second suppression component includes the second suppressor and the third suppressor, the first suppressor and the second suppressor are used to provide a return path for the surge current generated by the power supply, and the third suppressor and the discharge target are used to provide a discharge path for the surge voltage generated by the door lock.

3. The door lock protection device according to claim 2, characterized in that: In the case where the second suppression component only includes the second suppressor, the first end of the second suppressor is respectively connected to the positive pole of the power supply and the first end of the first suppressor, the negative pole of the power supply is connected to the negative pole of the door lock, and the second end of the second suppressor is respectively connected to the first target end of the door lock relay and the positive pole of the door lock, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay.

4. The door lock protection device according to claim 2, characterized in that: In a case where the second suppression assembly includes the second suppressor and the third suppressor, the first end of the second suppressor is connected to the positive electrode of the power supply and the first end of the first suppressor respectively, the negative electrode of the power supply is connected to the negative electrode of the door lock, and the second end of the second suppressor is connected to the first target end of the door lock relay and the positive electrode of the door lock respectively, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay; A first end of the third suppressor is connected to the positive electrode of the door lock and the first target end of the door lock relay respectively, and a second end of the third suppressor is connected to the ground end.

5. The door lock protection device according to claim 2, characterized in that: In a case where the second suppression assembly includes the second suppressor and the third suppressor, the first end of the second suppressor is connected to the negative pole of the power supply and the first end of the first suppressor respectively, the positive pole of the power supply is connected to the positive pole of the door lock, and the second end of the second suppressor is connected to the first target end of the door lock relay and the negative pole of the door lock respectively, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay; A first end of the third suppressor is connected to the negative electrode of the door lock and the first target end of the door lock relay respectively, and a second end of the third suppressor is connected to the ground end.

6. The door lock protection device according to claim 2, characterized in that: In the case where the second suppression component includes the second suppressor and the third suppressor, the first end of the second suppressor, the negative pole of the door lock, the first end of the first suppressor and the first end of the third suppressor are connected, the positive pole of the door lock is connected to the positive pole of the power supply, and the second end of the second suppressor is respectively connected to the first target end of the door lock relay and the negative pole of the power supply, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay; the second end of the third suppressor is connected to the ground end.

7. The door lock protection device according to claim 2, characterized in that: In the case where the second suppression component includes the second suppressor and the third suppressor, the first end of the second suppressor, the positive pole of the door lock, the first end of the first suppressor and the first end of the third suppressor are connected, the negative pole of the door lock is connected to the negative pole of the power supply, and the second end of the second suppressor is respectively connected to the first target end of the door lock relay and the positive pole of the power supply, the first target end includes the normally closed end or the normally open end of the door lock relay, and the first target end is determined based on the type of the door lock relay; the second end of the third suppressor is connected to the ground end.

8. The door lock protection device according to any one of claims 2 to 7, characterized in that: The device further includes a suppression capacitor connected in parallel with the second suppressor.

9. The door lock protection device according to any one of claims 3 to 7, characterized in that: The common terminal of the door lock relay is connected to the first target terminal.

10. A door lock control system, characterized in that: include: A door lock, a power supply and a door lock protection device as described in any one of claims 1 to 9, wherein the door lock, the power supply and the door lock protection device are connected in a ring shape.

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