Lighting device with charging recognition system

Abstract

The utility model relates to a kind of lighting device with charging identification system, including middle shaft, lamp holder and power supply component, middle shaft is equipped with installation cavity, installation cavity includes device bin and charging bin, there is conducting structure in charging bin and for accommodating rechargeable battery, rechargeable battery is electrically connected with power supply structure.Power supply component is located in device bin, including mainboard and the Hall sensor on mainboard, control chip and power supply structure, Hall sensor is used to detect the magnetic field signal on rechargeable battery, mainboard is integrated with charging circuit, control chip controls the on-off of charging circuit, mainboard is electrically connected to lamp holder by power supply structure.Hall sensor can be closed or opened to control chip to charging circuit by the magnetic field signal detected, to judge whether it is official battery and further execute charging instruction.

Description

Technical Field

[0001] This utility model relates to the field of lighting technology, and in particular to a lighting device with a charging identification system. Background Technology

[0002] Typically, lighting devices, as electrical appliances, are used to illuminate a surface. The lamp holder is connected to a battery within the supporting body via wires. To protect the charging circuitry of the lighting device and extend its lifespan, the charging compartment of a single lighting device can only accommodate rechargeable batteries within a specific range of specifications. However, users generally can only distinguish between different rechargeable batteries by their size and appearance, and cannot determine whether a battery is compatible with the lighting device based on its specifications. Utility Model Content

[0003] The present invention provides a charging compartment for a lighting device to solve the technical problem that it is not possible to directly determine whether a rechargeable battery is compatible with the lighting device to be used based on the parameters of the rechargeable battery.

[0004] This utility model discloses a lighting device, comprising:

[0005] A power supply assembly is located within the device compartment. The power supply assembly includes a motherboard and a Hall sensor, a control chip, and a power supply structure mounted on the motherboard. The Hall sensor is electrically connected to both the motherboard and the control chip. The Hall sensor is used to detect the magnetic field signal of the magnet on the rechargeable battery. The motherboard has a built-in charging circuit that charges the rechargeable battery through the conductive structure. The control chip is used to control the on / off state of the charging circuit. The motherboard is also electrically connected to the lamp holder through the power supply structure.

[0006] Specifically, when the Hall sensor detects that the magnetic field signal on the rechargeable battery is within the target magnetic field signal range, the control chip controls the charging circuit to close; conversely, when the Hall sensor detects that the magnetic field signal on the rechargeable battery is outside the target magnetic field signal range, the control chip controls the charging circuit to open.

[0007] In one embodiment, the conductive structure includes a first charging contact and a second charging contact. The charging chamber has an upper cavity wall and a bottom cavity wall along the axial direction of the central axis. The first charging contact is disposed on the upper cavity wall and electrically connected to the main board. The second charging contact is disposed on the bottom cavity wall and electrically connected to the main board. The Hall sensor is disposed at the location of the first charging contact.

[0008] When the rechargeable battery is installed in the charging compartment, the first charging contact and the second charging contact are electrically connected to the positive and negative electrodes of the rechargeable battery, respectively, and the motherboard, the first charging contact, the rechargeable battery, and the second charging contact form a current loop.

[0009] When the Hall sensor detects that the magnetic field signal on the rechargeable battery is within the target magnetic field signal range, the control chip controls the current loop to close, and the charging circuit to close.

[0010] Conversely, when the Hall sensor detects that the magnetic field signal on the rechargeable battery is outside the target magnetic field signal range, the control chip controls the current loop to disconnect and the charging circuit to open.

[0011] In one embodiment, the conductive structure includes a first elastic element disposed on the upper wall of the cavity and storing elastic force axially along the central axis; a first charging contact is disposed on the first elastic element; and the first elastic element is made of a conductive material; and / or,

[0012] The conductive structure further includes a second elastic element, which is disposed on the bottom wall of the cavity and accumulates elastic force along the central axis. The second charging contact is disposed on the second elastic element, which is made of conductive material.

[0013] In one embodiment, the power supply component includes a metal spring, the central shaft is made of conductive material and is electrically connected to the motherboard through the metal spring, and the second charging contact, the central shaft, the metal spring, and the motherboard are electrically connected in sequence.

[0014] In one embodiment, the number of metal springs is multiple and they are distributed circumferentially around the central axis between the motherboard and the cavity wall of the device compartment. The metal springs are squeezed between the motherboard and the central axis and accumulate elastic force.

[0015] In one embodiment, the conductive structure includes a first wire, and the second charging contact is electrically connected to the motherboard through the first wire.

[0016] In one embodiment, the power supply component includes a charging interface, one end of which is inserted into the device compartment and electrically connected to the motherboard, and the other end of which is exposed for external power supply.

[0017] In one embodiment, the motherboard integrates an alarm unit that, when the charging interface is connected to an external power source:

[0018] When the charging circuit is closed, the alarm unit is in the off state.

[0019] When the charging circuit is open, the alarm unit is in a closed state.

[0020] In one embodiment, the lighting device further includes a stand comprising a plurality of angled legs having movable ends and free ends opposite each other along their axial direction, the movable ends being connected to the central axis and the free ends being used to support a support surface.

[0021] In one embodiment, the lighting device further includes a movable rod having a first connecting end and a second connecting end opposite each other along its axial direction. The first connecting end is rotatably connected to the mounting end, and the second connecting end is connected to the lamp head. The first connecting end is rotatable relative to the mounting end until the movable rod is aligned with the central axis, and the lamp head is fastened to the support end.

[0022] The power supply structure includes a second wire, which passes through the movable rod. One end of the second wire is electrically connected to the motherboard, and the other end extends out of the mounting end, passes through the movable rod, and is electrically connected to the lamp holder.

[0023] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects:

[0024] This invention provides a lighting device with a charging identification system. The electrodes of the target battery (i.e., the official battery) are equipped with magnets of a fixed magnetic field strength range. The power supply component includes a Hall sensor, which detects the magnetic field signal on the rechargeable battery. The Hall sensor can use the detected magnetic field signal to cause the control chip to close or open the charging circuit, thereby determining whether it is an official battery and further executing the charging command. The charging compartment of this application only charges official batteries, thus preventing potential dangers from unofficial batteries, such as poor electrical contact or circuit burnout. Therefore, the lighting device of this application has a strong protection function for the circuit connection between the charging compartment and the official battery, further ensuring the electrical safety of the entire lighting device. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a lighting device in its stowed state according to an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the lighting device after the movable rod is switched to the extended state;

[0028] Figure 3 for Figure 2 A schematic diagram of the lighting device's legs after they have been switched to the extended state;

[0029] Figure 4 for Figure 2 A partial exploded structural diagram of the lighting device shown.

[0030] Figure 5 for Figure 3 A schematic diagram of the cross-sectional structure of the lighting device shown along the AA direction.

[0031] Figure 6 for Figure 5 A partially enlarged structural schematic diagram of the cross-sectional view shown;

[0032] Figure 7 A logic flowchart for switching the charging circuit on and off in a lighting device;

[0033] Figure 8 This is a logic flowchart for the on / off switching of the alarm unit in the lighting device.

[0034] The annotations in the attached figures are explained as follows:

[0035] 1. Lighting device with charging identification system;

[0036] 10. Central shaft; 101. Mounting end; 102. Supporting end; 11. Mounting cavity; 111. Component compartment; 112. Charging compartment; 113. Upper wall of the cavity; 114. Bottom wall of the cavity; 12. Conductive structure; 121. First charging contact; 122. Second charging contact; 123. First elastic element; 124. Second elastic element;

[0037] 20. Lamp holder;

[0038] 30. Power supply component; 31. Main board; 32. Hall sensor; 33. Power supply structure; 331. Second wire; 34. Metal spring; 35. Charging interface;

[0039] 40. Rechargeable battery; 41. Magnet; 42. First electrode; 43. Second electrode;

[0040] 50. Tripod; 51. Outrigger; 511. Movable end; 512. Free end;

[0041] 60. Movable rod; 61. First connecting end; 62. Second connecting end. Detailed Implementation

[0042] Typical embodiments embodying the features and advantages of this utility model will be described in detail in the following description. It should be understood that this utility model can have various variations in different embodiments, all of which do not depart from the scope of this utility model, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this utility model.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0044] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "setup," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] Reference Figure 1-3 This application provides a lighting device 1 with a charging identification system, which can switch between a retracted state, an unfolded state, and a stand state. In this embodiment, Figure 1 This illustration shows the lighting device 1 in its retracted state. In this state, the lighting device 1 can be held and carried by the user to provide illumination. For example, the user can obtain light by holding the lighting device 1, making it convenient for the user to move around at night. At the same time, when the lighting device 1 is in its retracted state, its size and space occupation are small, making it convenient to store and carry. Figure 2 The illustration shows the lighting device 1 in the unfolded state. In the unfolded state, the lighting device 1 has a higher illumination height and a wider illumination range. At this time, the user can hold it by hand and it can provide illumination for a wide range of mobile spaces when camping outdoors. When walking at night, it can be used as a mobile street light or a detector light, which not only facilitates wayfinding but also makes it easier for the user to observe the surrounding environment. Figure 3This illustrates that in other usage scenarios, the user can further unfold the lighting device 1 into a stand configuration, placing it on a flat or uneven support surface to provide illumination. For example, when reading or using a computer at home at night, appropriate lighting is needed to protect the eyes from strong light damage; in this case, the lighting device 1 can be supported on a desktop and used as a desk lamp. It should be noted that the usage state of the lighting device 1 in this application is not limited, as long as it can fulfill the lighting function.

[0046] Reference Figure 4-7 The lighting device 1 includes a central axis 10, a lamp head 20, and a power supply assembly 30. The central axis 10 provides support, the lamp head 20 is connected to one end of the central axis 10 for illumination, and the power supply assembly 30 is located within the central axis 10 to provide power. Specifically, the central axis 10 has a mounting end 101 and a supporting end 102 opposite to each other along its axial direction. The central axis 10 has a mounting cavity 11 located between the mounting end 101 and the supporting end 102. The mounting cavity 11 includes a device compartment 111 and a charging compartment 112. The charging compartment 112 has a conductive structure 12 and is used to accommodate a rechargeable battery 40. The rechargeable battery 40 located within the charging compartment 112 is electrically connected to the conductive structure 12. The lamp head 20 is connected to the mounting end 101. The power supply assembly 30 is located within the device compartment 111 and includes a main board 31, a Hall sensor 32, a control chip (not shown), and a power supply structure 33 mounted on the main board 31. The Hall sensor 32 is electrically connected to both the motherboard 31 and the control chip. The Hall sensor 32 is used to detect the magnetic field signal of the magnet 41 on the rechargeable battery 40. The motherboard 31 has a built-in charging circuit that charges the rechargeable battery 40 through the conductive structure 12. The control chip is used to control the on / off state of the charging circuit. The motherboard 31 is also electrically connected to the lamp holder 20 through the power supply structure 33. Figure 7 As shown, when the Hall sensor 32 detects that the magnetic field signal on the rechargeable battery 40 is within the target range (magnetic field signal matching), it determines that the rechargeable battery 40 is an official battery. The control chip then controls the charging circuit on the main board 31 to close, allowing the charging compartment 112 to charge the official battery. When the Hall sensor 32 detects that the magnetic field signal on the rechargeable battery 40 is outside the target range (magnetic field signal mismatch), it determines that the rechargeable battery 40 is a non-official battery. The control chip then controls the charging circuit on the main board 31 to open, preventing the charging compartment 112 from charging the non-official battery. In other words, when the Hall sensor 32 matches the magnetic field signal on the rechargeable battery 40, it determines that it is an official battery, allowing the control chip to execute the charging command for the charging compartment 112. Otherwise, charging is not possible, thus ensuring that the charging compartment 112 of the lighting device 1 only charges official batteries.

[0047] This invention provides a lighting device 1 with a charging identification system. The target rechargeable battery 40 (i.e., an official battery) has magnets with a fixed magnetic field strength range on its electrodes. The power supply component 30 is equipped with a Hall sensor 32, which detects the magnetic field signal on the rechargeable battery 40. The Hall sensor 32 can use the detected magnetic field signal to cause the control chip to close or open the charging circuit, thereby determining whether it is an official battery and further executing a charging command for the official battery. The charging compartment 112 of this application only charges official batteries, thus preventing potential dangers from unofficial batteries, such as poor electrical contact or circuit burnout. Therefore, the lighting device 1 of this application has a strong protection function for the circuit connection between the charging compartment 112 and the official battery, further ensuring the electrical safety of the entire lighting device 1.

[0048] Here, in conjunction with references Figure 4 and Figure 5 The rechargeable battery 40 has a first electrode 42 and a second electrode 43 on opposite sides along the central axis 10. One of the first electrode 42 and the second electrode 43 is a positive electrode, and the other is a negative electrode. Optionally, in one embodiment, the Hall sensor 32 is an omnipolar Hall switch. An omnipolar Hall switch generates a response signal to both N and S pole magnetic fields, meaning that the placement of the magnet 41 on the rechargeable battery 40 does not need to be limited; the magnet 41 can be placed on either the first electrode 42 or the second electrode 43.

[0049] Preferably, in conjunction with reference Figure 4-7 In one embodiment, the conductive structure 12 includes a first charging contact 121 and a second charging contact 122. The charging chamber 112 has an upper cavity wall 113 and a bottom cavity wall 114 along the central axis. The first charging contact 121 is located on the upper cavity wall 113 and electrically connected to the main board 31, and the second charging contact 122 is located on the bottom cavity wall 114 and electrically connected to the main board 31. The Hall sensor 32 is located at the position of the first charging contact 121. The device chamber 111 and the power supply component 30 are close to the lamp holder 20, and the main board 31 is positioned even closer to the lamp holder 20, thereby greatly reducing the wiring length of the main board 31 for supplying power to the lamp holder 20, making the wire distribution of the power supply component 30 simpler and more reasonable. It should be noted that, without considering the length of the power supply component 30 wiring, in this application, the distance between the motherboard 31 and the lamp head 20 is not limited. It is only necessary to set the Hall sensor 32 at the location of either the first charging contact 121 or the second charging contact 122. The Hall sensor 32 can detect the magnetic field signal of the rechargeable battery 40 to control the on / off state of the charging circuit on the motherboard 31.

[0050] When the rechargeable battery 40 is installed in the charging compartment 112, the first charging contact 121 and the second charging contact 122 are electrically connected to the first electrode 41 and the second electrode 42 (i.e., positive and negative electrodes) of the rechargeable battery 40, respectively. At this time, the motherboard 31, the first charging contact 121, the rechargeable battery 40, and the second charging contact 122 form a current loop. Figure 7 As shown, when the Hall sensor 32 detects that the magnetic field signal on the rechargeable battery 40 is within the target range, it determines that the rechargeable battery 40 is an official battery. The control chip controls the current loop to close, and the charging circuit to close, so that the charging compartment 112 can charge the official battery. Conversely, when the Hall sensor 32 detects that the magnetic field signal on the rechargeable battery 40 is outside the target range, it determines that the rechargeable battery 40 is an unofficial battery. The control chip controls the current loop to open, and the charging circuit to open, so that the charging compartment 112 cannot charge the unofficial battery.

[0051] Preferably, continue to refer to Figure 4-6 The conductive structure 12 includes a first elastic element 123, which is disposed on the upper wall 113 of the cavity and accumulates elastic force along the axial direction of the central axis 10. A first charging contact 121 is disposed on the first elastic element 123. The first elastic element 123 is made of conductive material to achieve electrical contact. The conductive structure 12 also includes a second elastic element 124, which is disposed on the bottom wall 114 of the cavity and accumulates elastic force along the axial direction of the central axis. A second charging contact 122 is disposed on the second elastic element 124. The second elastic element 124 is made of conductive material to achieve electrical contact. When the rechargeable battery 40 is installed in the charging compartment 112, the first elastic element 123 is located between the main board 31 and the first electrode 42, and the second elastic element 124 is located between the main board 31 and the second electrode 43. The elastic force released by the first elastic element 123 and the second electrode 43 can improve the installation stability of the rechargeable battery 40, limit the relative wobbling and misalignment between the rechargeable battery 40 and the central shaft 10, improve the electrical contact stability between the first charging contact 121 and the first electrode 42, and improve the electrical contact stability between the second charging contact 122 and the second electrode 43. Therefore, the first elastic element 123 and the second elastic element 124 not only provide an electrical connection method but also improve the installation stability of the rechargeable battery 40. It should be noted that in other embodiments, only one elastic element can be provided to achieve electrical connection and improve installation stability; or no elastic element is required, and electrical contact can be achieved through a flexible wire or conductive terminal. Therefore, in this application, the presence or absence of the first elastic element 123 and the second elastic element 124 is not limited.

[0052] Optionally, in conjunction with reference Figure 5 and 6In one embodiment, the power supply component 30 further includes a metal spring 34. The central shaft 10 is made of conductive material and is electrically connected to the motherboard 31 through the metal spring 34. The second charging contact 122, the central shaft 10, the metal spring 34, and the motherboard 31 are sequentially electrically connected to achieve the second charging contact 122 being electrically connected to the motherboard 31. At this time, the motherboard 31, the first elastic element 123, the rechargeable battery 40, the second elastic element 124, the central shaft 10, and the metal spring 34 form a current loop. When the Hall sensor 32 detects that the rechargeable battery 40 is an official battery, the charging circuit is closed, and the charging compartment 112 charges the rechargeable battery 40; otherwise, the battery compartment 112 cannot charge non-official batteries. It should be noted that in other embodiments, the central shaft 10 may also be made of insulating material, and the conductive structure 12 includes a first wire (not shown), and the second charging contact 122 is electrically connected to the motherboard 31 through the first wire.

[0053] Furthermore, in conjunction with references Figure 5 and Figure 6 Multiple metal springs 34 are arranged in a ring around the central axis 10 between the motherboard 31 and the cavity wall of the device compartment 111. The metal springs 34 are pressed between the motherboard 31 and the cavity wall of the device compartment 111, accumulating elastic force. The elastic force released by the metal springs 34 further secures the motherboard 31 against the device compartment 111, making the relative static state between the motherboard 31 and the central axis 10 more stable. It should be understood that, firstly, in this embodiment, the motherboard 31 is electrically connected to the central axis 10 via the metal springs 34. In other embodiments, the motherboard 31 can also be electrically connected to the central axis 10 and the rechargeable battery 40 via flexible wires or conductive terminals. Secondly, without considering the installation stability of the motherboard 31, the number of metal springs 34 can be multiple or a single spring, and the distribution of the metal springs 34 can be uniformly distributed circumferentially or unevenly distributed; both can achieve the electrical connection of the motherboard 31 to the central axis 10. That is, in this application, the presence, number, and distribution of the metal springs 34 are not limited.

[0054] Optionally, refer to Figure 6 In one embodiment, the power supply component 30 includes a charging interface 35. One end of the charging interface 35 is inserted into the device compartment 111 and electrically connected to the motherboard 31, while the other end of the charging interface 35 is exposed for external power supply. It should be noted that in other embodiments, the charging interface 35 is not required. A charging cable can extend directly from the motherboard 31 for external power supply charging; or charging contacts can be provided for external plug-in charging; or magnetic contacts can be used for charging. Therefore, in this application, the implementation of the charging interface 35 is not limited, nor is the presence or absence of the charging interface 35 limited; any means of external power supply should be protected.

[0055] Reference Figure 6 and Figure 8 To further protect the charging and power safety of the lighting device, in one embodiment, the mainboard 31 integrates an alarm unit (not shown). The alarm unit can issue a clear reminder when the rechargeable battery 40 installed in the charging compartment 112 is not an official battery, allowing the user to quickly determine whether the rechargeable battery 40 is an official battery. The reminder includes, but is not limited to, sound, light, and vibration alerts. When the charging interface 35 is connected to an external power source and the rechargeable battery 40 is installed in the charging compartment 112: when the Hall sensor 32 detects that the magnetic field signal on the rechargeable battery 40 is within the target range, it determines that the rechargeable battery 40 is an official battery, the charging circuit is closed, the charging compartment 112 charges the rechargeable battery 40 normally, and the alarm unit is in the off state, without issuing a reminder. Conversely, when the Hall sensor 32 detects that the magnetic field signal on the rechargeable battery 40 is outside the target range, it determines that the rechargeable battery 40 is an unofficial battery, the charging circuit is open, the alarm unit is in the closed state, and a clear reminder is issued to remind the user to remove the unofficial battery in time to avoid the safety hazards caused by the unofficial battery to the power consumption of the entire lighting device 1. It should be noted that in other embodiments, the lighting device 1 itself has a light-up reminder whether it is charging normally or not, so in this application, the setting of an alarm unit is not limited.

[0056] Preferably, refer to Figure 3 In one embodiment, the lighting device 1 includes a stand 50, which includes multiple angled legs 51. Each leg 51 has a movable end 511 and a free end 512 opposite to each other along its axial direction. The movable end 511 is connected to the support end 102 of the central shaft 10, and the free end 512 is used to support a support surface. Optionally, the stand 50 can be in an unfolded state (…). Figure 3 (as shown) and storage status ( Figure 2 Switching between (as shown). It should be noted that in other embodiments, the tripod 50 may not be provided, and the user can hold the central axis 10 to use the lighting device 1. Therefore, in this application, whether the tripod 50 is folded down is not limited, nor is whether the lighting device 1 is provided with a tripod 50.

[0057] Preferably, in conjunction with reference Figure 1 and Figure 2In one embodiment, the lighting device 1 further includes a movable rod 60, which has a first connecting end 61 and a second connecting end 62 opposite each other along its axial direction. The first connecting end 61 is rotatably connected to the mounting end 101, and the second connecting end 62 is connected to the lamp head 20. The first connecting end 61 can rotate relative to the mounting end 101 until the movable rod 60 is parallel to the central axis 10, and the lamp head 20 is fastened to the support end 102. At this time, the entire lighting device 1 is housed in its smallest volume. Here, the movable rod 60 allows for more flexible adjustment of the lighting position of the lamp head 20, making the lighting device 1 suitable for more scenarios. Figure 4 and Figure 5 The power supply structure 33 includes a second conductor 331, which passes through the movable rod 60. One end of the second conductor 331 is electrically connected to the main board 31, and the other end extends out of the mounting end 101, passes through the movable rod 60, and is electrically connected to the lamp holder 20. The main board 31 is electrically connected to the lamp holder 20 through the second conductor 331. It should be noted that in other embodiments, the movable rod 60 and the second conductor 331 may not be provided, and the lamp holder 20 may also be electrically connected to the main board through contact terminals, plug interfaces, etc.

[0058] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A lighting device with a charging identification system, characterized in that, include: A central shaft has a mounting end and a support end opposite to each other along its axial direction. The central shaft is provided with a mounting cavity, which includes a device compartment and a charging compartment. The charging compartment is provided with a conductive structure and is used to accommodate a rechargeable battery. The rechargeable battery located in the charging compartment is electrically connected to the conductive structure. The lamp holder is connected to the mounting end; A power supply assembly is located within the device compartment. The power supply assembly includes a motherboard and a Hall sensor, a control chip, and a power supply structure mounted on the motherboard. The Hall sensor is electrically connected to both the motherboard and the control chip. The Hall sensor is used to detect the magnetic field signal of the magnet on the rechargeable battery. The motherboard has a built-in charging circuit that charges the rechargeable battery through the conductive structure. The control chip is used to control the on / off state of the charging circuit. The motherboard is also electrically connected to the lamp holder through the power supply structure. Specifically, when the Hall sensor detects that the magnetic field signal on the rechargeable battery is within the target magnetic field signal range, the control chip controls the charging circuit to close; conversely, when the Hall sensor detects that the magnetic field signal on the rechargeable battery is outside the target magnetic field signal range, the control chip controls the charging circuit to open.

2. The lighting device according to claim 1, characterized in that, The conductive structure includes a first charging contact and a second charging contact. The charging chamber has an upper cavity wall and a bottom cavity wall along the axial direction of the central axis. The first charging contact is located on the upper cavity wall and electrically connected to the main board. The second charging contact is located on the bottom cavity wall and electrically connected to the main board. The Hall sensor is located at the position of the first charging contact. When the rechargeable battery is installed in the charging compartment, the first charging contact and the second charging contact are electrically connected to the positive and negative electrodes of the rechargeable battery, respectively, and the motherboard, the first charging contact, the rechargeable battery, and the second charging contact form a current loop. When the Hall sensor detects that the magnetic field signal on the rechargeable battery is within the target magnetic field signal range, the control chip controls the current loop to close, and the charging circuit to close. Conversely, when the Hall sensor detects that the magnetic field signal on the rechargeable battery is outside the target magnetic field signal range, the control chip controls the current loop to disconnect and the charging circuit to open.

3. The lighting device according to claim 2, characterized in that, The conductive structure includes a first elastic element, which is disposed on the upper wall of the cavity and accumulates elastic force along the central axis. The first charging contact is disposed on the first elastic element, and the first elastic element is made of a conductive material. And / or, The conductive structure further includes a second elastic element, which is disposed on the bottom wall of the cavity and accumulates elastic force along the central axis. The second charging contact is disposed on the second elastic element, which is made of conductive material.

4. The lighting device according to claim 2, characterized in that, The power supply component includes a metal spring, the central shaft is made of conductive material and is electrically connected to the motherboard through the metal spring, and the second charging contact, the central shaft, the metal spring, and the motherboard are electrically connected in sequence.

5. The lighting device according to claim 4, characterized in that, The number of metal springs is multiple and they are distributed in a ring around the central axis between the motherboard and the cavity wall of the device compartment. The metal springs are squeezed between the motherboard and the central axis and accumulate elastic force.

6. The lighting device according to claim 2, characterized in that, The conductive structure includes a first wire, and the second charging contact is electrically connected to the motherboard through the first wire.

7. The lighting device according to claim 1, characterized in that, The power supply component includes a charging interface. One end of the charging interface is inserted into the device compartment and electrically connected to the motherboard, while the other end of the charging interface is exposed for external power supply.

8. The lighting device according to claim 7, characterized in that, The motherboard integrates an alarm unit. When the charging interface is connected to an external power source: When the charging circuit is closed, the alarm unit is in the off state. When the charging circuit is open, the alarm unit is in a closed state.

9. The lighting device according to claim 1, characterized in that, The lighting device also includes a stand, which includes multiple angled legs. Each leg has a movable end and a free end that are opposite each other along its axial direction. The movable end is connected to the central axis, and the free end is used to support a support surface.

10. The lighting device according to claim 1, characterized in that, The lighting device further includes a movable rod having a first connecting end and a second connecting end opposite each other along its axial direction. The first connecting end is rotatably connected to the mounting end, and the second connecting end is connected to the lamp head. The first connecting end can rotate relative to the mounting end until the movable rod is parallel to the central axis and close together, and the lamp head is fastened to the support end. The power supply structure includes a second wire, which passes through the movable rod. One end of the second wire is electrically connected to the motherboard, and the other end extends out of the mounting end, passes through the movable rod, and is electrically connected to the lamp holder.

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