Door lock self-generating device and door lock

Abstract

A door lock self-power-generation device comprises a mounting base, a piezoelectric body and a shaking body capable of shaking, the piezoelectric body is arranged on the mounting base and located on the outer side of the shaking body, and the shaking body can impact the piezoelectric body when shaking so that the piezoelectric body can generate current; the piezoelectric body is connected to the charging circuit and outputs current to the charging circuit. The utility model further relates to a door lock which adopts the door lock self-generating device. The shaking body can impact the piezoelectric body along with the movement of the door so as to generate electricity, and the electric energy generated by the piezoelectric body is processed and stored through the charging circuit. In this way, after the power supply energy of the battery is used up, the stored electric energy can be output to the battery or directly supplied to the lock end, the cruising ability of the door lock can be improved, and the situation that the door cannot be opened when the battery is completely out of power can be avoided.

Description

Technical Field

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

[0002] Currently, most smart door locks on the market use batteries as a power source to provide the power required for operation. As the functions of smart locks gradually increase, their power consumption is also increasing, which causes the battery life of smart locks to become shorter and shorter, and the batteries need to be frequently removed for replacement, which is very inconvenient.

[0003] In addition, although some smart door locks on the market have a low battery reminder function, there are still situations where users forget to replace the battery and do not bring a mechanical lock, resulting in the inability to open the door. In order to deal with this situation, there are also emergency methods of using external power supplies in the prior art, such as using a power bank to temporarily power the door lock. Although it can open the door, it is not convenient for users to temporarily find an external power supply. Utility Model Content

[0004] In view of the technical problems existing in the prior art, the purpose of the utility model is to provide a door lock self-generating device and a door lock, which can improve the endurance of the door lock power supply and facilitate emergency use when the door lock battery runs out of power.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a door lock self-generating device, including a mounting seat, a piezoelectric body and a shakeable shaking body, the piezoelectric body is arranged on the mounting seat and is located on the outside of the shaking body, so that the shaking body can hit the piezoelectric body when shaking, so that the piezoelectric body generates current; the piezoelectric body is connected to a charging circuit and outputs current to the charging circuit.

[0006] After adopting this structure, the door lock self-generating device is installed on the door. When the user opens or closes the door, or when the wind blows and causes the door to vibrate, the shaking body will shake back and forth under the action of inertia and hit the piezoelectric body, thereby generating electricity (AC power supply). The electric energy generated by the piezoelectric body is processed and stored by the charging circuit. When the door lock power supply energy is exhausted, the stored electric energy can be output to the door lock power supply or the door lock electrical load to power it. This not only increases the endurance of the door lock, but also can be used as an emergency door opening when the user fails to replace the power supply in time.

[0007] As a preference, the piezoelectric body is a piezoelectric ceramic.

[0008] Preferably, the mounting seat is provided with a cavity for accommodating the shaking body, one end of the cavity is open, the shaking body is arranged in the cavity and has a gap with the cavity, and the piezoelectric body is fixedly arranged on the opening side of the cavity.

[0009] As a preference, the cavity and the shaking body are both cylindrical, one end of the shaking body faces the piezoelectric body, and the surface of the shaking body and the wall of the cavity are both smooth surfaces.

[0010] As a preferred embodiment, the mounting seat comprises a base and a top cover, a groove is formed on one side of the top cover, and the cavity for accommodating the shaking body is formed in the groove;

[0011] The piezoelectric body is arranged on the base, the piezoelectric body is in a sheet shape and is located at the opening side of the groove; the base is fixedly connected to the top cover.

[0012] As a preference, the base is provided with a plurality of first convex strips, the top cover is provided with a plurality of second convex strips, and the first convex strips and the second convex strips cooperate and interlace to surround the outer side of the piezoelectric body.

[0013] As a preferred embodiment, the top cover is provided with a wire passing hole, the piezoelectric body is connected to the charging circuit via a wire, and the wire passes through the wire passing hole.

[0014] A door lock adopts the above-mentioned door lock self-generating device.

[0015] Preferably, the charging circuit connected to the piezoelectric body includes a rectifying and filtering unit, a voltage stabilizing unit and an energy storage unit, the current output end of the piezoelectric body is connected to the input end of the rectifying and filtering unit, and the output end of the rectifying and filtering unit is connected to the energy storage unit via the voltage stabilizing unit.

[0016] As a preferred embodiment, the door lock further includes a main controller, a power detection unit and a switch unit; wherein:

[0017] The main controller is connected to the switch unit and is used to control the working state of the switch unit;

[0018] The main controller is connected to the power detection unit, detects the power of the door lock power supply through the power detection unit, and controls the state of the switch unit according to the power of the door lock power supply;

[0019] The charging circuit connected to the piezoelectric body is connected to the door lock power supply through the switch unit, and is used to charge the door lock power supply through the switch unit; and / or, the charging circuit and the door lock power supply connected to the piezoelectric body are connected to the door lock electrical load through the switch unit, and the charging circuit or the door lock power supply connected to the piezoelectric body is selected by controlling the switch unit to supply power to the door lock electrical load;

[0020] or,

[0021] The door lock also includes a switch unit, and the charging circuit and door lock power supply connected to the piezoelectric body are connected to the power supply end of the door lock electrical load through the switch unit. By operating the switch unit, the charging circuit or door lock power supply connected to the piezoelectric body is selected to power the door lock electrical load.

[0022] In general, the utility model has the following advantages: the door lock self-generating device can generate and store electricity by itself during normal use. When the battery of the door lock is exhausted, the stored electric energy can power the door lock to improve the endurance of the door lock. The electric energy stored in the energy storage unit can also be used in emergencies. Even if you forget to replace the door lock power supply after the door lock low battery alarm appears, you don’t have to worry about not being able to open the door due to lack of power, and you don’t need to carry a mechanical key or a power bank. It is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The present invention is a three-dimensional structural diagram of a door lock self-generating device.

[0024] Figure 2 A three-dimensional structural diagram of the connection between the mounting base, piezoelectric body, shaking body and circuit board.

[0025] Figure 3 An exploded view of the mount, piezoelectric body, shaking body, and circuit board.

[0026] Figure 4 This is a three-dimensional structural diagram of the top cover.

[0027] Figure 5 This is a three-dimensional structural diagram of the lock panel.

[0028] Figure 6 This is the circuit schematic diagram of the charging circuit.

[0029] Figure 7 This is a circuit diagram of the door lock in the second embodiment.

[0030] Figure 8 This is a circuit diagram of the door lock in Example 3.

[0031] Fig. 9 This is a circuit diagram of the door lock in Embodiment 4.

[0032] Among them, 1 is a base, 2 is a piezoelectric body, 3 is a shaking body, 4 is a top cover, 5 is a circuit board, 6 is a lock panel, 41 is a groove, and 42 is a wire hole. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0034] Embodiment 1

[0035] like Figure 1 to Figure 5As shown, a door lock self-generating device includes a mounting seat, a piezoelectric body 2 and a shakeable shaking body 3. The piezoelectric body 2 is arranged on the mounting seat and is located on the outside of the shaking body 3, so that the shaking body 3 can hit the piezoelectric body 2 when shaking, so that the piezoelectric body 2 generates current; the piezoelectric body 2 is connected to the charging circuit and outputs current to the charging circuit.

[0036] The piezoelectric body 2 is a piezoelectric ceramic. As a relatively sensitive piezoelectric material, piezoelectric ceramic can convert weak mechanical energy into electrical energy. In addition to opening and closing the door, the piezoelectric body can also generate electrical energy when the piezoelectric body slightly hits the door when the wind blows the door to produce a small vibration, which can ensure that it can store enough electrical energy during daily use.

[0037] The mounting seat is provided with a cavity for accommodating the shaking body 3, one end of the cavity is open, the shaking body 3 is arranged in the cavity and matches with the cavity gap, and the piezoelectric body 2 is fixedly arranged on the opening side of the cavity.

[0038] The cavity and the shaking body 3 are both cylindrical, one end of the shaking body 3 faces the piezoelectric body 2, and the surface of the shaking body 3 and the wall of the cavity are both smooth surfaces.

[0039] The shaking body 3 can slide back and forth slightly in the cavity to achieve shaking of the shaking body 3. When shaking, one end of the shaking body 3 hits the piezoelectric body 2 at the opening side of the cavity to generate electrical energy. The smooth surface of the shaking body 3 and the wall of the cavity can reduce friction resistance, thereby reducing the mechanical energy loss when the shaking body 3 slides in the cavity.

[0040] The size of the cavity is slightly larger than the size of the shaking body 3, so that the shaking body 3 can have a certain amount of space to move when shaking. Specifically, the cross-sectional diameter of the cavity is 1 to 1.5 mm larger than the cross-sectional diameter of the shaking body 3, and the length of the cavity is 1 to 1.5 mm larger than the length of the shaking body 3. In this way, it can be ensured that the shaking body can shake freely in the cavity and easily hit the piezoelectric body 2.

[0041] The mounting base includes a base 1 and a top cover 4. A groove 41 is formed on one side of the top cover 4. A cavity for accommodating the shaking body 3 is formed in the groove 41. The piezoelectric body 2 is arranged on the base. The piezoelectric body 2 is in a sheet shape and is located at the opening of the groove 41. The base 1 is fixedly connected to the top cover 4. The piezoelectric body can be stably installed between the base 1 and the top cover 4 through the connection between the two, which is convenient for assembly and can also protect the piezoelectric body 2 to avoid adverse effects of the external environment on the piezoelectric body 2.

[0042] The base 1 is provided with a plurality of first convex strips, and the top cover is provided with a plurality of second convex strips. The first convex strips and the second convex strips are coordinated and staggered to surround the outer side of the piezoelectric body.

[0043] In this embodiment, the piezoelectric body 2 is in the shape of a circular sheet, and the first convex strip and the second convex strip are in arc shape, which are staggered to form a circle, so that the piezoelectric body 2 can be limited and fixed.

[0044] When the piezoelectric body is in other shapes, the first convex strip and the second convex strip can also be set in other shapes and arrangements to match the piezoelectric body. For example, when the piezoelectric body is square, the first convex strip and the second convex strip can be L-shaped or strip-shaped and enclosed outside the piezoelectric body.

[0045] The top cover 4 is provided with a wire hole 42, and the piezoelectric body 2 is connected to the charging circuit through a wire, and the wire passes through the wire hole 42. The wire passes through the wire hole and extends out of the mounting seat, which is convenient for assembly and wiring.

[0046] Embodiment 2

[0047] A door lock comprises a door lock self-generating device in the first embodiment.

[0048] The door lock also includes a lock panel 6 and a circuit board 5. The charging circuit is arranged on the circuit board. The lock panel 6 is provided with a mounting column. The circuit board 5 is connected to the end of the mounting column by screws. The base 1 is provided with a mounting hole. The top cover 4 is provided with a mounting sleeve. The mounting hole and the mounting sleeve are sequentially mounted on the mounting column.

[0049] When the door lock is installed, the lock panel is fixedly mounted on the door, and the axis of the cavity is perpendicular to the door surface.

[0050] like Figure 6 As shown, the charging circuit connected to the piezoelectric body 2 includes a rectifying and filtering unit, a voltage stabilizing unit and an energy storage unit. The current output end of the piezoelectric body 2 is connected to the input end of the rectifying and filtering unit, and the output end of the rectifying and filtering unit is connected to the energy storage unit through the voltage stabilizing unit.

[0051] The energy storage unit may be a capacitor, such as a supercapacitor.

[0052] The self-generating process of the door lock is as follows: when the door is opened or closed or the door is vibrated by external forces such as wind, the shaking body shakes in the cavity and hits the piezoelectric ceramic. At this time, the piezoelectric ceramic generates alternating current, which is converted into unstable direct current through the rectification and filtering unit, and then obtained through the voltage stabilizing unit to obtain stable direct current, and then stored in the energy storage unit.

[0053] like Figure 7 As shown, the door lock also includes a main controller, a power detection unit and a switch unit;

[0054] Wherein: the main controller is connected to the switch unit and is used to control the working state of the switch unit;

[0055] The main controller is connected to the power detection unit, detects the power of the door lock power supply through the power detection unit, and controls the state of the switch unit according to the power of the door lock power supply;

[0056] The charging circuit connected to the piezoelectric body is connected to the door lock power supply through the switch unit, and is used to charge the door lock power supply through the switch unit.

[0057] Specifically, the main controller may be an MCU or the like, the switch unit is a relay, and the state of the relay is controlled by the main controller.

[0058] The specific working principle of the above-mentioned door lock is as follows: the power detection unit detects the power information of the door lock power supply in real time and feeds it back to the main controller. The main controller compares the acquired power information with the set threshold value. When it is lower than the set threshold value, it is determined that the power of the door lock power supply is too low. At this time, a high level (or low level) can be output to control the working state of the switch unit, so that the output end of the charging circuit is connected to the input end of the door lock power supply, so as to discharge to the door lock power supply through the energy storage unit in the charging circuit, thereby charging the door lock power supply line and extending the battery life of the door lock power supply; when the power detection unit detects that the door lock power supply has sufficient power, specifically it can be fully charged or the power is higher than a predetermined value, the main controller controls the working state of the switch unit, so that the output end of the charging circuit is disconnected from the door lock power supply port.

[0059] In this embodiment, the door lock power supply is a rechargeable battery (such as a lithium battery).

[0060] Embodiment 3

[0061] A door lock comprises the door lock self-generating device in the first embodiment.

[0062] like Figure 8 As shown, the door lock also includes a main controller, a power detection unit and a switch unit;

[0063] Wherein: the main controller is connected to the switch unit and is used to control the working state of the switch unit;

[0064] The main controller is connected to the power detection unit, detects the power of the door lock power supply through the power detection unit, and controls the state of the switch unit according to the power of the door lock power supply;

[0065] The charging circuit and door lock power supply connected to the piezoelectric body are connected to the door lock electrical load through the switch unit, and the charging circuit or door lock power supply connected to the piezoelectric body is selected by controlling the switch unit to supply power to the door lock electrical load.

[0066] The specific working principle is as follows: the power detection unit detects the power information of the door lock power supply in real time and feeds it back to the main controller. The main controller compares the acquired power information with the set threshold. When it is above the set threshold, it outputs a high level (or a low level) to control the working state of the switch unit so that the output end of the door lock power supply is connected to the power supply end of the door lock power load, that is, the power is supplied by the door lock power supply. When it is lower than the set threshold, it outputs a low level (or a high level) to control the working state of the switch unit so that the output end of the charging circuit is connected to the power supply end of the door lock power load, that is, the power is supplied by the charging circuit.

[0067] When the power information detected by the power detection unit is lower than the set threshold, the controller controls the working state of the switch unit on the one hand, and issues a low power alarm on the other hand to remind the user to replace the power supply.

[0068] Embodiment 4

[0069] A door lock comprises the door lock self-generating device in the first embodiment.

[0070] like Fig. 9 As shown, the door lock also includes a switch unit, and the charging circuit connected to the piezoelectric body and the door lock power supply are connected to the power supply end of the door lock electrical load through the switch unit. By operating the switch unit, the charging circuit connected to the piezoelectric body or the door lock power supply is selected to power the door lock electrical load.

[0071] The switch unit can be a single-pole double-throw switch, which can be manually operated to switch the power supply. The moving contact of the switch unit is connected to the power supply end of the door lock electrical load, the first static contact is connected to the output end of the door lock power supply, and the second static contact is connected to the output end of the charging circuit. The user can operate the moving contact so that the moving contact contacts the first static contact or the second static contact. The switch unit can be set in a relatively hidden position on the front panel of the door lock. When the door lock power supply is sufficient, the moving contact is connected to the first static contact and powered by the door lock power supply. When the user finds that the door lock power supply is out of power and cannot open the door, the switch unit can be operated to make the moving contact contact with the second static contact. At this time, the door lock is switched to be powered by the energy storage unit of the charging circuit, thereby realizing emergency unlocking and avoiding the situation in the prior art where a mechanical key or a power bank needs to be carried.

[0072] In this embodiment, the door lock power source can be a rechargeable battery (such as a lithium battery) or a non-rechargeable dry cell. When the door lock battery is a dry cell, the door lock can be replaced and discarded each time the dry cell is no longer able to supply power. There is no need to replace the battery in advance to avoid being unable to open the door, which can improve the battery power utilization rate and avoid resource waste and unnecessary environmental pollution.

[0073] The above embodiments are preferred implementation modes of the utility model, but the implementation modes of the utility model are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the utility model should be equivalent replacement methods and are included in the protection scope of the utility model.

Claims

1. A door lock self-generating device, characterized in that: It comprises a mounting seat, a piezoelectric body and a shaking body, wherein the piezoelectric body is arranged on the mounting seat and located outside the shaking body, so that the shaking body can hit the piezoelectric body when shaking, so that the piezoelectric body generates current; The piezoelectric body is connected to a charging circuit and outputs current to the charging circuit.

2. A door lock self-generating device according to claim 1, characterized in that: The piezoelectric body is a piezoelectric ceramic.

3. A door lock self-generating device according to claim 1, characterized in that: The mounting seat is provided with a cavity for accommodating the shaking body, one end of the cavity is open, the shaking body is arranged in the cavity and is gap-matched with the cavity, and the piezoelectric body is fixedly arranged on the open side of the cavity.

4. A door lock self-generating device according to claim 3, characterized in that: The cavity and the shaking body are both cylindrical, one end of the shaking body faces the piezoelectric body, and the surface of the shaking body and the wall surface of the cavity are both smooth surfaces.

5. A door lock self-generating device according to claim 3, characterized in that: The mounting seat comprises a base and a top cover, a groove is formed on one side of the top cover, and the cavity for accommodating the shaking body is formed in the groove; The piezoelectric body is arranged on the base, the piezoelectric body is in a sheet shape and is located at the opening side of the groove; the base is fixedly connected to the top cover.

6. A door lock self-generating device according to claim 5, characterized in that: The base is provided with a plurality of first convex strips, and the top cover is provided with a plurality of second convex strips, and the first convex strips and the second convex strips are coordinated and staggered to surround the outer side of the piezoelectric body.

7. A door lock self-generating device according to claim 5, characterized in that: The top cover is provided with a wire-through hole, the piezoelectric body is connected to a charging circuit via a wire, and the wire passes through the wire-through hole.

8. A door lock, characterized in that: The invention comprises the door lock self-generating device according to any one of claims 1 to 7.

9. The door lock according to claim 8, characterized in that: The charging circuit connected to the piezoelectric body includes a rectifying and filtering unit, a voltage stabilizing unit and an energy storage unit. The current output end of the piezoelectric body is connected to the input end of the rectifying and filtering unit, and the output end of the rectifying and filtering unit is connected to the energy storage unit through the voltage stabilizing unit.

10. The door lock according to claim 8, characterized in that: It also includes a main controller, a power detection unit and a switch unit; wherein: The main controller is connected to the switch unit and is used to control the working state of the switch unit; The main controller is connected to the power detection unit, detects the power of the door lock power supply through the power detection unit, and controls the state of the switch unit according to the power of the door lock power supply; The charging circuit connected to the piezoelectric body is connected to the door lock power supply through the switch unit, and is used to charge the door lock power supply through the switch unit; and / or, the charging circuit and the door lock power supply connected to the piezoelectric body are connected to the door lock electrical load through the switch unit, and the charging circuit or the door lock power supply connected to the piezoelectric body is selected by controlling the switch unit to supply power to the door lock electrical load; or, The door lock also includes a switch unit, and the charging circuit and door lock power supply connected to the piezoelectric body are connected to the power supply end of the door lock electrical load through the switch unit. By operating the switch unit, the charging circuit or door lock power supply connected to the piezoelectric body is selected to power the door lock electrical load.

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