Patent Description:
Each of documents <CIT> and <CIT> discloses a lighting device of the generic type defined above.

A lighting device is a lighting tool. With the rapid development of technology, increasingly high requirements are put on the brightness of the lighting device in various fields. With increasingly high requirements on the brightness of a portable lighting device, a problem emerges that the endurance of the lighting device becomes shorter and shorter. Moreover, the overall weight of a high-power lighting device is relatively large and the operation convenience of the high-power lighting device is relatively low. At present, how to provide a lighting device with long endurance, a wide use range, strong environment adaptiveness, and convenient operation is a technical problem to be solved urgently.

Document <CIT> discloses an LED multipurpose movie and TV light filling lamp including the lamp body, the lamp body encircled by several LED flatboard annular luminescent plates of articulated formation all around and equipped with a power supply for the annular luminescent plates, one annular luminescent plate or two annular luminescent plates are fixed in the lamp body.

Document <CIT> discloses a folding work lamp, including a work light base member, a center rotation axis, a panel rotation axis, a fixed base, and detachable lamp shade and work light panel. A top of the work light base member is provided with a handle and is equipped with a fixing base in its bottom. The work light base member is equipped with an adjust knob outward. Power connection and central rotation axis are equipped with a control module, and the center rotation axis passes through the panel rotation axis and connects the work light panel. The fixing base includes an H type support and a connector.

Document <CIT> discloses a collapsible work light including a support and having a lamp holder installed on the support. The lamp holder, a left lamp holder and a right lamp holder may be folded upwards and include a middle lamp holder to be folded down at a center of the lamp holder, and the middle lamp holder is down fixed on the support.

Document <CIT> discloses a maintenance lamp comprising a body and at least one first lamp body. An accommodating groove corresponding to the at least one first lamp body is provided on a side wall of the body. The at least one first lamp body is rotatably provided on the side wall of the body to be accommodated in the accommodating groove. Each first lamp body comprises a light source assembly, and each first lamp body further comprises an extension state of rotating towards a direction away from the body so as to light and an accommodated state of rotating towards the accommodating groove so that the light source assembly is accommodated in the accommodating groove.

Document <CIT> discloses a handheld turnover lamp. The handheld turnover lamp comprises a light-emitting part and a lamp body part. The light-emitting part comprises at least one light source body. The lamp body part comprises a lamp body shell, a handheld shell arranged on the lamp body shell and at least one light source shell arranged on the lamp body shell in a turnover mode. Each light source body is installed in the corresponding light source shell. The radiation direction of light rays generated by each light source body is adjusted in the mode that each light source shell overturns relative to the lamp body shell.

Document <CIT> discloses a folding lamp including a main body, a rotating member, and side light emitting members, the rotating member being rotatably connected to the main body via a bottom cap, and the side light emitting members being rotatably connected to the bottom cap.

To solve deficiencies in the existing art, an object of the present invention is to provide a lighting device.

To achieve the preceding object, the present disclosure provides a lighting device according to claim <NUM> attached. Preferred embodiments of the invention are defined in claims attached and dependent upon claim <NUM>.

A lighting device <NUM> shown in <FIG> includes a base <NUM>, a panel assembly <NUM>, and a power supply assembly <NUM>, where the panel assembly <NUM> and the power supply assembly <NUM> are both disposed on the base <NUM>. The panel assembly <NUM> includes a main panel <NUM> and multiple auxiliary panels, where the multiple auxiliary panels include a first auxiliary panel <NUM>, a second auxiliary panel <NUM>, and a third auxiliary panel <NUM>. The main panel <NUM> is fixedly connected to the base <NUM>, the first auxiliary panel <NUM> is rotatably connected to the main panel <NUM>, the second auxiliary panel <NUM> is rotatably connected to the first auxiliary panel <NUM>, the third auxiliary panel <NUM> is rotatably connected to the first auxiliary panel <NUM>, and the second auxiliary panel <NUM> and the third auxiliary panel <NUM> are respectively disposed on two sides of the first auxiliary panel <NUM>. In the case where the main panel <NUM>, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> are all disposed in the same plane, the panel assembly <NUM> can emit light in the same direction. In the case where the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> rotate to different positions relative to the main panel <NUM>, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> can emit light in their respective planes. Therefore, the lighting device <NUM> may be configured to emit light in any direction at the same time or may be configured to focus on one direction to emit light. The lighting device <NUM> further includes a first illumination mode and a second illumination mode. Specifically, in the case where only local lighting is required in an operation environment, the lighting device <NUM> may be operated to control one panel in the panel assembly <NUM> to light up. In this example, in the case where the lighting device <NUM> is in the first illumination mode, the first auxiliary panel <NUM> lights up, and the main panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> are off. In this case, the first auxiliary panel <NUM> may also be adjusted to output different lumens. Specifically, according to environmental requirements, the first auxiliary panel <NUM> may output four lumens. In the case where ambient lighting is required, that is, when an entire region needs to be illuminated, the lighting device <NUM> may be operated to control all panels to light up, so as to provide omni-directional illumination for the environment in which the lighting device <NUM> is currently located. In this case, the lighting device <NUM> is in the second illumination mode, the main panel <NUM>, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> all light up, that is, the lighting device <NUM> can illuminate a region within a <NUM>° range. In the case where the lighting device <NUM> is in the second illumination mode, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> may also be operated to rotate around their respective rotation axes, thereby adjusting the lighting device <NUM> to be in the best illumination state. The lighting device <NUM> further has a brightness adjustment device. When the lighting device <NUM> is in different illumination modes, the panel assembly <NUM> may be adjusted to output different lumens so that the lighting device <NUM> emits light of different intensities. In addition, the lighting device <NUM> further includes a third illumination mode, a fourth illumination mode, and a fifth illumination mode. Specifically, in the case where the lighting device <NUM> is in the third illumination mode, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> light up, and the main panel <NUM> is off. In this case, the lighting device <NUM> can illuminate a high and far place. In the case where the lighting device <NUM> is in the fourth illumination mode, the main panel <NUM>, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> all light up, and the panel assembly <NUM> flashes twice or three times per second, thereby providing an alarm function. In the case where the lighting device <NUM> is in the fifth illumination mode, the main panel <NUM>, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> all light up, and the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> may each be adjusted to output a maximum lumen. In this case, the lighting device <NUM> illuminates the environment in a strongest illumination state and can output, at a maximum power, a lumen greater than a lumen in the second illumination mode.

Specifically, in this example, the first auxiliary panel <NUM> is connected above the main panel, and the second auxiliary panel <NUM> and the third auxiliary panel <NUM> are disposed on left and right sides of the first auxiliary panel so that the unfolded lighting device <NUM> is T-shaped. Further, the first auxiliary panel <NUM> may also be disposed on a left or right side of the main panel <NUM>, and when folded, the first auxiliary panel <NUM> overlaps with the main panel <NUM>. Furthermore, more auxiliary panels may be connected to the second auxiliary panel <NUM> and the third auxiliary panel <NUM>, or the third auxiliary panel <NUM> may not be provided.

In the case where the panel assembly <NUM> includes only <NUM> or <NUM> auxiliary panels, or only <NUM> or <NUM> auxiliary panels of at least three auxiliary panels in the panel assembly <NUM> light up, a luminous flux of light emitted by the panel assembly <NUM> at the maximum power is greater than or equal to <NUM> lm is less than or equal to <NUM> lm. The luminous flux of the light emitted by the panel assembly <NUM> at the maximum power is greater than or equal to <NUM> lm and less than or equal to <NUM> lm. Optionally, the luminous flux of the light emitted by the panel assembly <NUM> at the maximum power is within a range formed by one or more of <NUM> lm, <NUM> lm, <NUM> lm, <NUM> lm, <NUM> lm, <NUM> lm, <NUM> lm, <NUM> lm, <NUM> lm, <NUM> lm, and <NUM> lm. A luminous flux of light emitted by the main panel <NUM> or the auxiliary panel at the maximum power is greater than or equal to <NUM> lm and less than or equal to <NUM> lm. The panel assembly <NUM> includes a shell for light to pass through. In the case where the shell is made of a transparent material, all of light from a luminous body in the panel assembly <NUM> basically passes through the shell and is projected to an outside of the lighting device <NUM>. In this case, the luminous flux of the light emitted by the panel assembly <NUM> at the maximum power is greater than or equal to <NUM> lm and less than or equal to <NUM> lm. In the case where the shell is made of a translucent material, the luminous flux of the light emitted by the panel assembly at the maximum power is greater than or equal to <NUM> Im and less than or equal to <NUM> lm. The translucent material here may refer to all materials that cause a loss of a luminous flux of the luminous body or refer to materials that are between a completely transparent material and a completely opaque material. A color temperature of the panel assembly <NUM> is greater than or equal to <NUM> and less than or equal to <NUM>. A color rendering index of the panel assembly <NUM> is greater than or equal to <NUM>, and a test result shows that a color rendering index of the lighting device <NUM> in this example may be greater than <NUM>. Further, a rated voltage of the power supply assembly <NUM> is greater than or equal to <NUM> V. Preferably, the rated voltage is greater than or equal to <NUM> V. The present invention further defines an illuminance efficiency coefficient of the lighting device. The illuminance efficiency coefficient is a ratio of the luminous flux of the light emitted by the panel assembly <NUM> at the maximum power to a volume of the lighting device in a folded state. The illuminance efficiency coefficient is greater than or equal to <NUM> lm/dm<NUM> and less than or equal to <NUM> lm/dm<NUM> and, in particular, may be greater than or equal to <NUM> lm/dm<NUM> and less than or equal to <NUM> lm/dm<NUM>.

The power supply assembly <NUM> includes a battery pack for storing energy, the battery pack includes a battery pack housing and a plurality of cells arranged in the battery pack housing, and the plurality of cells are lithium-ion cells. In some examples, the plurality of cells are pouch-type cells and each of the plurality of cells is a flat bag-like structure.

The lighting device <NUM> includes an unfolded state shown in <FIG> and the folded state shown in <FIG>. The lighting device <NUM> is further provided with a cover plate <NUM> covering at least part of the power supply assembly <NUM>. The cover plate <NUM> may expand to cover at least part of the power supply assembly <NUM>. To clearly illustrate technical solutions of the present invention, a front side, a rear side, a left side, a right side, an upper side, and a lower side shown in <FIG> are further defined. When the lighting device <NUM> is in the folded state shown in <FIG>, the power supply assembly <NUM> may be inserted into or detached from the main panel <NUM> along an up-and-down direction. In fact, the power supply assembly <NUM> may also be inserted into or detached from the base <NUM>, and a weight of the power supply assembly <NUM> is directly added to the base <NUM> so that the base <NUM> supports other structures more stably. The preceding detachment mechanism may also be disposed on a back of the main panel <NUM>, where the back refers to a side opposite to an illumination region. After the power supply assembly <NUM> is connected to a casing on the back of the main panel <NUM>, a side of the power supply assembly <NUM> may be in contact with a surface of the base or a gap exists between the side of the power supply assembly <NUM> and the surface of the base <NUM>. In this case, the weight of the power supply assembly <NUM> is added to the main panel <NUM> so that the main panel is more stable as a main light source. When the power supply assembly <NUM> is installed on the main panel <NUM>, the lighting device <NUM> has a first center of gravity, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> may rotate to any position, and the lighting device <NUM> does not overturn. An orthographic projection of the power supply assembly <NUM> on a plane where the base is located is within the base <NUM> or basically within the base <NUM> so that an orthographic projection of the first center of gravity on the plane where the base <NUM> is located is in a middle of the base. When a power supply device is detached from the main panel <NUM>, the lighting device <NUM> has a second center of gravity, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> may rotate to any position, and the lighting device <NUM> does not overturn. Along a front-and-rear direction, a distance between the first center of gravity and the second center of gravity is less than or equal to <NUM>.

The base <NUM> is a bottom base extending substantially along a first plane P1, and the main panel <NUM> extends substantially along a second plane P2. The first auxiliary panel <NUM> is rotatably connected to the main panel <NUM> about a first axis 100a, and the first axis 100a is substantially parallel to the first plane P1 and is substantially parallel to the second plane P2. The second auxiliary panel <NUM> is rotatably connected to the first auxiliary panel <NUM> about a second axis 100b, and the second axis 100b is substantially perpendicular to the first axis 100a. The third auxiliary panel <NUM> is rotatably connected to the first auxiliary panel <NUM> about a third axis 100c, and the third axis 100c is substantially perpendicular to the first axis 100a and is substantially parallel to the second axis 100b.

When the lighting device <NUM> is in the folded state shown in <FIG>, the first auxiliary panel <NUM> is operated to rotate to the front side of the main panel <NUM>, the power supply assembly <NUM> is disposed at the rear side of the main panel <NUM>, the main panel <NUM> is disposed between the main panel <NUM> and the first auxiliary panel <NUM>, the second auxiliary panel <NUM> is operated to rotate backward and disposed at right side of the power supply assembly <NUM>, and the third auxiliary panel <NUM> is operated to rotate backward and disposed at left side of the power supply assembly <NUM>. When the lighting device <NUM> is in the folded state, the main panel <NUM>, the second auxiliary panel <NUM>, and third auxiliary panel <NUM> are surrounded to form a U-shaped area 100d, and the power supply assembly <NUM> is arranged at least partially in the U-shaped area 100d.

A direction in which the power supply assembly <NUM> is coupled to the main panel <NUM> is substantially perpendicular to the first plane P1.

Specifically, a control device is further disposed inside the base <NUM> and basically disposed on a rear side of the base <NUM> in the front-and-rear direction so that when the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> rotate to the foremost side, the lighting device <NUM> can also maintain stability without overturning. It is to be understood that when the lighting device <NUM> is in the folded state, the panel assembly <NUM> at least partially covers the power supply assembly <NUM> so as to protect the power supply assembly. More specifically, in the case where the lighting device <NUM> is in the unfolded state, a volume of the lighting device <NUM> is greater than or equal to <NUM> dm<NUM> and less than or equal to <NUM> dm<NUM>; and in the case where the lighting device <NUM> is in the folded state, the volume of the lighting device <NUM> is greater than or equal to <NUM> dm<NUM> and less than or equal to <NUM> dm<NUM>. In this example, power of the lighting device <NUM> is configured to be greater than or equal to <NUM> W and less than or equal to <NUM> W. Therefore, a power-to-volume ratio of the lighting device <NUM> is configured to be greater than or equal to <NUM> W/dm<NUM> and less than or equal to <NUM> W/dm<NUM>. Further, in the case where the power-to-volume ratio of the lighting device <NUM> is configured to be greater than or equal to <NUM> W/dm<NUM> and less than or equal to <NUM> W/dm<NUM>, the lighting device <NUM> has the best transportation, storage, and use states.

The lighting device <NUM> further includes a first handle <NUM> and a second handle <NUM>. The first handle <NUM> is disposed on the first auxiliary panel <NUM> and the second handle <NUM> is disposed on the main panel <NUM>. In the case where the lighting device <NUM> is in the unfolded state, the first handle <NUM> may be operated so as to transport the lighting device <NUM>. In the case where the lighting device <NUM> is in the folded state, the second handle <NUM> may be operated so as to transport the lighting device <NUM>. The first handle <NUM> and the second handle <NUM> are provided so that the lighting device <NUM> can be quickly transported in any state, and no interference exists between the handles and the lighting device <NUM> during transportation.

In this example, the base <NUM> is further provided with a positioning groove <NUM>, and each of the second auxiliary panel <NUM> and the third auxiliary panel <NUM> is further provided with a positioning protrusion <NUM>. In the case where the lighting device <NUM> is in the folded state, the positioning protrusion <NUM> on each of the second auxiliary panel <NUM> and the third auxiliary panel <NUM> mates with the positioning groove <NUM> on the base <NUM>. In this manner, when the lighting device <NUM> is in the folded state, the lighting device <NUM> can maintain stability so that the following case is avoided: the second auxiliary panel <NUM> or the third auxiliary panel <NUM> is detached from the base when the lighting device <NUM> shakes. The base <NUM> is made of a flexible anti-drop material so that the drop resistance of the lighting device <NUM> can be effectively increased. In addition, the positioning protrusion <NUM> is made of a rigid material and installed on the second auxiliary panel <NUM> and the third auxiliary panel <NUM>, so as to effectively ensure the stability of the lighting device <NUM> in the folded state.

The base <NUM> is provided with a circuit board and a button circuit board, where the circuit board is disposed in a middle of the base <NUM>, and the button circuit board and a corresponding button region <NUM> are disposed on a side of the base <NUM>. Related lines connected to the circuit board extend in the casing of the main panel <NUM>, and some lines are connected to the button circuit board. It is conceivable that the button circuit board and the circuit board form a modular connection. As shown in <FIG>, the button region <NUM> includes a main button <NUM>, a first button <NUM>, a second button <NUM>, a third button <NUM>, and a function position <NUM>. The main button <NUM> is configured to turn on and off the lighting device <NUM>. The lighting device <NUM> is further provided with a wireless module for communicating with an external device. When the main button <NUM> is continuously pressed for more than a set time, the wireless module is turned on. Specifically, the main button <NUM> is further provided with an indicator light, which can switch light display according to the preceding states such as startup, shutdown, or a connection to the wireless module. The first button <NUM> and the second button <NUM> are respectively configured to increase and decrease a brightness value of the panel assembly <NUM>. Further, when the first button <NUM> or the second button <NUM> is continuously pressed for more than a set time, the brightness value of the panel assembly <NUM> directly jumps to a lowest or highest brightness of the panel assembly <NUM>. The third button <NUM> is operated so as to switch the on and off of the main panel and the multiple auxiliary panels. Further, when the third button <NUM> is continuously pressed for more than a set time, the panel assembly <NUM> enters the fourth illumination mode. The function position <NUM> includes a connecting slot and a cover for closing the connecting slot, where the connecting slot is configured to be in a shape for being connected to an external line, such as a universal serial bus (USB) interface.

As shown in <FIG>, in this example, the main panel <NUM>, the first auxiliary panel <NUM>, the second auxiliary panel <NUM>, and the third auxiliary panel <NUM> are all configured to have basically the same heat dissipation structure. The main panel <NUM> is configured to include a casing <NUM> and a light board <NUM>, and the luminous body in this example is the light board <NUM> integrated with multiple light sources. The casing <NUM> is formed with an accommodation space 1213c, and the light board <NUM> is disposed in the accommodation space 1213c. Specifically, the casing <NUM> includes a first casing portion <NUM> and a second casing portion <NUM>, where the first casing portion <NUM> and the second casing portion <NUM> are connected so as to form the accommodation space 1213c. The light board <NUM> is provided with light beads 1214a. To quickly dissipate heat generated by the light beads 1214a, the light board <NUM> is configured to be made of an aluminum plate. A heat sink <NUM> is further provided on a side of the light board <NUM> facing away from the light beads 1214a. The heat sink <NUM> is fixedly connected to the light board <NUM> and can dissipate the heat generated by the light beads 1214a on the light board <NUM>. A reflector cup <NUM> is further provided on a side of the light board <NUM> facing towards the light beads 1214a, and the reflector cup <NUM> mates with the light beads 1214a. Specifically, to reduce the weight of the entire panel and maintain a relatively good heat dissipation effect, the entire heat sink <NUM> is a thin sheet, thereby effectively reducing the weight of the heat sink <NUM>. Further, a heat conducting member <NUM> is further provided between the heat sink and the first casing portion <NUM>, and the heat conducting member <NUM> can transfer heat of the heat sink <NUM> to the first casing portion <NUM> from which the heat is dissipated.

The light board <NUM> or the circuit board is a waterproof structure with a waterproof layer on its surface. The waterproof layer covers at least part of a whole composed of an insulating layer and a first-type electronic component with basically the same thickness through vapor deposition. The waterproof layer covers the entire light board <NUM> through plasma-enhanced chemical vapor deposition. Therefore, the light board <NUM> will not come into contact with external dust and water vapor, so as to achieve dustproof, waterproof, and corrosion-proof effects.

As an implementation manner, the heat conducting member <NUM> is supported by a heat conducting silicone pad with a thermal conductivity greater than or equal to <NUM> W/(m·K) so that the heat of the heat sink <NUM> can be quickly dissipated. It is to be understood that the heat conducting member <NUM> may also be made of heat conducting materials described below. In the case where the heat conducting member <NUM> is made of a carbon nanotube composite material, the carbon nanotube composite material is added to an inside of a rubber elastomer, and the carbon nanotube composite material and a heat conductor with excellent uniformity and a high thermal conductivity are achieved through a high thermal conductivity of the carbon nanotube composite material. In the case where the heat conducting member <NUM> is made of a composite material of multilayer graphene and its derivative (graphene oxide), a heat dissipation effect of the light body is enhanced through an excellent Young's modulus, excellent thermal stability, and an excellent thermal conductivity (<NUM> W/(m·K) to <NUM> W/(m K)) of graphene. A ceramic layer with a high thermal conductivity may also be attached to the surface of the light board <NUM>. No adhesive is provided between the light board <NUM> and the ceramic layer. The light board <NUM> is bonded to the ceramic layer through an atomic force between the light board <NUM> and crystal grains of the ceramic layer so that a thermal resistance between the light board <NUM> and the ceramic layer can be reduced, and thus heat of the light beads 1214a is quickly transferred from the light board <NUM> to the ceramic layer and then a surface of the first casing portion <NUM>. The heat conducting member <NUM> may also configured to be other materials with an excellent heat conducting effect and excellent thermal stability, which is not repeated herein.

When the heat conducting member <NUM> transfers heat to the first casing portion <NUM>, in order that the heat is quickly dissipated, the first casing portion <NUM> is further provided with heat dissipation ribs 1212a. The heat dissipation ribs 1212a are distributed around an outer surface of the first casing <NUM> so that a surface area of the outer surface of the first casing portion <NUM> can be effectively increased, thereby increasing heat dissipation efficiency. It is to be understood that the heat dissipation ribs 1212a may also be disposed on an outer surface of the second casing portion <NUM>, so as to further increase the heat dissipation efficiency of the panel. In fact, through the preceding heat dissipation structure, in the case where the light beads 1214a inside the panel is in operation, the heat generated by the light beads 1214a can be quickly transferred to the heat conducting member <NUM> through the heat sink <NUM> and quickly transferred to the first casing portion <NUM> through the heat conducting member <NUM>, thereby quickly dissipating heat in the accommodation space 1213c. In this example, the heat generated by the light beads 1214a is dissipated through heat transfer and air cooling, and the casing <NUM> does not need to be provided with separate heat dissipation air ports, thereby effectively increasing the leakproofness of the panel. To further increase the leakproofness of the panel, a sealing structure is further provided.

A material of the casing <NUM> includes plastic, or the material of the casing includes resin or similar polymers. A material of at least the second casing portion <NUM> includes plastic. A proportion of the plastic in the casing <NUM> or the second casing portion <NUM> should exceed <NUM>%. In the existing art, aluminum sheets are used as the main heat dissipation elements of the heat dissipation structure, and even the casing made of aluminum is directly used. However, an aluminum sheet structure is bulky in volume and heavy in weight and is inconvenient in many aspects in actual use. In this example, the material of the casing is the plastic. After multiple tests, while the overall mass of the panel is reduced by <NUM>% and the overall thickness of the panel is reduced by <NUM>%, it is ensured that the heat dissipation effect is better than that of an existing structure. In the test of the heat dissipation effect, the temperature of an outer edge of the heat dissipation rib 1212a is at least between <NUM> and <NUM>, ensuring that the temperature is within a safe touch range of a user, the temperature of a peripheral side and other positions of the casing <NUM> is also maintained between <NUM> and <NUM>. Based on the heat dissipation structure in this example, a thickness D of the panel assembly <NUM> may be configured to be greater than or equal to <NUM> and less than or equal to <NUM>, and, in particular, may be configured to be greater than or equal to <NUM> and less than or equal to <NUM> so that the entire panel assembly is lighter. The aluminum sheet structure is replaced with plastic heat dissipation ribs 1212a, and the heat sink <NUM> and the heat conducting member <NUM> sequentially transfer heat to the heat dissipation ribs 1212a through heat conduction. The combination of multiple materials and the multilayer structure has both portability and the heat dissipation effect.

Specifically, the first casing portion <NUM> and the second casing portion <NUM> are provided with a slot structure. As an implementation manner, the first casing portion <NUM> is formed with a groove 1212b, and the second casing portion <NUM> is formed with a protrusion 1213a. In the case where the first casing portion <NUM> and the second casing portion <NUM> are connected to form a whole, the protrusion 1213a mates with the groove 1212b, thereby forming a first layer of sealing structure. It is to be understood that it is also feasible that the first casing portion <NUM> is formed with a protrusion, the second casing portion <NUM> is formed with a groove, and the protrusion mates with the groove so as to achieve leakproofness, which is not limited herein. In this example, the second casing portion <NUM> is further formed with an opening 1213b which can allow light to be emitted out. Over the opening 1213b, a transparent cover 1213d is further provided for light to pass through, and the transparent cover 1213d closes the opening 1213b. In this example, the transparent cover 1213d and the second casing portion <NUM> are also provided with a slot structure basically the same as the slot structure provided on the first casing portion <NUM> and the second casing portion <NUM>, which is not repeated herein. In fact, the slot structure provided on the first casing portion <NUM> and the second casing portion <NUM> and the slot structure provided on the transparent cover 1213d and the second casing portion <NUM> together form the first layer of sealing structure for the accommodation space 1213c.

A sealing ring <NUM> that mates with the transparent cover 1213d is further provided in the accommodation space 1213c. Specifically, the first casing portion <NUM> is formed with or connected to a first limiting portion 1212c that mates with the sealing ring <NUM>, and the sealing ring <NUM> is formed with a second limiting portion 1218a that mates with the first limiting portion 1212c. When the first limiting portion 1212c mates with the second limiting portion 1218a, the sealing ring <NUM> mates with the first casing portion <NUM> and is at least partially fixed to the first casing portion <NUM>. A sealing groove 1218b is further provided on a side of the sealing ring <NUM> facing away from the second limiting portion 1218a, and the transparent cover 1213d can be at least partially disposed in the sealing groove 1218b, thereby achieving secondary sealing. The transparent cover 1213d is also compressed by the second casing portion <NUM> and further compressed into the sealing groove 1218b, thereby enhancing a sealing effect.

As shown in <FIG>, a hook assembly <NUM> is further provided on a lower side of the base <NUM> of the lighting device <NUM>. The hook assembly <NUM> is rotatably connected to the base <NUM> and can rotate to a storage position and a hanging position. When the hook assembly <NUM> is in the storage position, in the up-and-down direction, a hook is located on an inner side of the base <NUM>, that is, the hook does not protrude from a plane where a lowermost side of the base <NUM> is located. When the hook assembly <NUM> is in the hanging position, the hook can rotate out and protrude from the plane where the lowermost side of the base <NUM> is located. In this case, the lighting device <NUM> may be hung at a suitable position. <FIG> further shows a sliding groove <NUM> that may connect the lighting device <NUM> to another tool, that is, another accessory may be connected to the sliding groove <NUM> of the lighting device <NUM> and fixed to another tool. In addition, the base <NUM> is further formed with or connected to a nut <NUM> to be connected to another tool, where the nut <NUM> is configured to fix the lighting device <NUM> to other tools or other places.

As shown in <FIG>, the first auxiliary panel <NUM> is rotatably connected to the main panel <NUM>, and a damping mechanism is provided. Specifically, the first auxiliary panel <NUM> is connected to or formed with a pivot <NUM> with a hollow interior and formed with a first pivot portion <NUM>. The main panel <NUM> is connected to or formed with a first sleeve 121a and a second sleeve 121c for connecting the pivot <NUM>. Each of the first sleeve 121a and the second sleeve 121c is formed with a through hole through which the first pivot portion <NUM> may pass. The first sleeve 121a is further formed with a channel 121b through which wires may pass. In this example, the wires pass out of the main panel <NUM> through the channel 121b of the first sleeve 121a, are distributed around the first pivot portion <NUM>, and are wound out of an opening 1213b of the pivot <NUM> and then wound into the first auxiliary panel <NUM>. Therefore, in the case where the first auxiliary panel <NUM> and the main panel <NUM> rotate relative to each other, the wires do not interfere with the pivot <NUM>. More specifically, the lighting device <NUM> includes a retaining ring <NUM> for at least partially enclosing the wires and the retaining ring <NUM> is distributed around a second pivot portion <NUM>. The second pivot portion <NUM> is at least partially inserted into an inner side of the first pivot portion <NUM> so that the wires are enclosed by the retaining ring <NUM> and prevented from being detached from the first pivot portion <NUM>. The lighting device <NUM> further includes a first knob <NUM> for fixing the second pivot portion <NUM>, where the first knob <NUM> is formed with an accommodation groove for accommodating at least part of the second pivot portion <NUM>. The accommodation groove is clamped or threaded to the second pivot portion <NUM>, which is not repeated herein. The first knob <NUM> is also clamped to the first sleeve 121a so that the first knob <NUM> can be fixed to the first sleeve 121a. The lighting device <NUM> further includes a damper piece <NUM> detachably connected to the pivot <NUM>. When the first auxiliary panel <NUM> rotates relative to the main panel <NUM>, the damper piece <NUM> can implement a damping effect between the pivot <NUM> and the second sleeve 121c so that the first auxiliary panel <NUM> is fixed at a preset position relative to the main panel <NUM>. The lighting device <NUM> further includes an adjustment member <NUM> that adjusts a magnitude of a damping force of the damper piece <NUM>. The adjustment member <NUM> is formed with or connected to an adjustment rod <NUM>. The damper piece <NUM> is formed with a connecting hole <NUM> that mates with the adjustment rod <NUM>. When the adjustment rod <NUM> is inserted into the connecting hole <NUM>, the adjustment rod <NUM> can adjust the magnitude of the damping force of the damper piece <NUM> so that the following case is avoided: the first auxiliary panel <NUM> is loosened when rotating to the preset position relative to the main panel <NUM> and cannot be fixed at the preset position.

As shown in <FIG>, the second auxiliary panel <NUM> is rotatably connected to the first auxiliary panel <NUM>, and a damping device <NUM> is formed at a connecting portion so that the second auxiliary panel <NUM> can rotate to any position relative to the first auxiliary panel <NUM> and be fixed at a current position. It is to be understood that the third auxiliary panel <NUM> is rotatably connected to the first auxiliary panel <NUM>, and the damping device <NUM> is formed at the connecting portion so that the third auxiliary panel <NUM> can rotate to any position relative to the first auxiliary panel <NUM> and be fixed at a current position.

As shown in <FIG>, the position and attitude of each panel during use are shown in the example. To satisfy requirements of the user, the attitude of the lighting device <NUM> may be adjusted so as to form a main illumination region and an auxiliary illumination region. The main illumination region refers to the case where the panel assembly directly illuminates a target position or a large part of light can illuminate the target position at a current power, and the auxiliary illumination region refers to the case where the panel assembly indirectly illuminates the target position or part of the light does not illuminate the target position at the current power. The auxiliary illumination region forms background light or ambient light. It is to be understood that a distance at which the lighting device <NUM> in this example is used is not limited. However, since the lighting device <NUM> in this example is more suitable for an illumination requirement for operation in a large space, the formation of the preceding auxiliary illumination region is based on that an illuminated target is located in front of and at a certain distance from the lighting device <NUM>. Since the main panel <NUM> is fixed to the base <NUM>, the main illumination region includes at least light emitted by the main panel <NUM> so as to ensure the brightness required for operation. Specifically, a surface of the main panel <NUM> forms a main illumination plane <NUM> from which the light is emitted. In the case where at least part of the auxiliary panels are located on a front side of the main illumination plane <NUM>, this part forms the main illumination region; and in the case where at least part of the auxiliary panels are located on a rear side of the main illumination plane <NUM>, this part forms the auxiliary illumination region. In another manner of description, when an included angle α between the first auxiliary panel and the main illumination plane is ≤ <NUM>°, part of the multiple auxiliary panels forms the main illumination region; when α ≥ <NUM>°, part of the multiple auxiliary panels forms the auxiliary illumination region. In another manner of description, the lighting device has a projection plane <NUM> that receives light and is parallel to the main illumination plane <NUM>, and it is assumed that the projection plane <NUM> is a target that actually receives illumination. Light emitted by the multiple auxiliary panels is projected on the projection plane <NUM> so as to form an actual illumination area. In the case where the multiple auxiliary panels are parallel to the projection plane <NUM>, the light emitted by the multiple auxiliary panels is projected on the projection plane <NUM> so as to form a maximum illumination area. In the case where a ratio of the actual illumination area to the maximum illumination area is less than or equal to <NUM>, the multiple auxiliary panels form the auxiliary illumination region.

Further, in the second manner of description, the first auxiliary panel has a first illumination plane from which light is emitted, the second auxiliary panel has a second illumination plane from which light is emitted, and an angle β is formed between the first illumination plane and the second illumination plane. In the case where <NUM>° ≤ α ≤ <NUM>° and β ≥ <NUM>°, both the first auxiliary panel <NUM> and the second auxiliary panel <NUM> form the main illumination region. In the case where α ≥ <NUM>° and β ≥ <NUM>°, in addition to the first auxiliary panel <NUM>, part of the second auxiliary panel <NUM> can also form the auxiliary illumination region. In the case where α ≥ <NUM>° and β ≤ <NUM>°, the first auxiliary panel <NUM> and the second auxiliary panel <NUM> form the auxiliary illumination region. Normally, for a better illumination effect, the user does not configure the first auxiliary panel <NUM> to be in a state where α ≤ <NUM>°. For this special case where α ≤ <NUM>°, except the main panel, all the auxiliary panels form the auxiliary illumination region. In the example, when the third auxiliary panel <NUM> is further provided, the third auxiliary panel <NUM> is configured in the same manner as the second auxiliary panel <NUM>.

<FIG> show the case where an accessory <NUM> connected to the sliding groove <NUM> is hung outside. The lighting device <NUM>, the accessory <NUM>, and an external structure <NUM> form a lighting system. Of course, in other examples, if the external structure <NUM> is provided with a corresponding structure for connecting the sliding groove <NUM>, the accessory <NUM> may not be provided, and the external structure <NUM> may be directly connected to the lighting device <NUM>.

One end of the accessory <NUM> is detachably connected to the external structure <NUM> and the other end of the accessory <NUM> is detachably connected to the base <NUM>. The external structure <NUM> may be a rod or handle of another tool or may be a structure in an external environment, which is not limited herein. The accessory <NUM> includes a first connecting portion <NUM> and a second connecting portion <NUM>, where the first connecting portion <NUM> and the second connecting portion <NUM> are connected to the external structure <NUM> and the base <NUM>, respectively.

The first connecting portion <NUM> at least partially covers the external structure <NUM> so as to form a stable and reliable connection. In other words, the first connecting portion <NUM> includes a casing at least provided with an opening <NUM>, and the opening <NUM> places a connected part of the external structure <NUM> and connects the connected part to the casing. As a manner of connection to a common external structure, this example provides a schematic view of connection to a rod-shaped external structure. Specifically, the first connecting portion <NUM> may be configured to be a ring, a hook, or a claw-shaped structure hung on or connected to the rod-shaped external structure <NUM>. In other examples, the first connecting portion <NUM> may also be other common connecting structures. It is to be understood that the first connecting portion <NUM> may be configured to be a detachable and replaceable structure to adapt to various different external structures <NUM>.

The second connecting portion <NUM> is directly or indirectly connected to the first connecting portion <NUM>, and the second connecting portion <NUM> is formed with a sliding portion <NUM> connected to the sliding groove <NUM>. The sliding groove <NUM> includes a first cavity <NUM> for buffering movement of the sliding portion <NUM> and a second cavity <NUM> connected to the sliding portion <NUM>. A diameter of the first cavity <NUM> is greater than or equal to a maximum diameter of the sliding portion <NUM>. The first cavity <NUM> accommodates the sliding portion <NUM> to be connected to the second cavity <NUM>. The sliding portion <NUM> moves in the first cavity <NUM> and enters the second cavity <NUM> until the sliding portion <NUM> is connected to the second cavity <NUM>.

The sliding portion <NUM> is formed with a first sliding portion <NUM> and a second sliding portion <NUM> with a diameter greater than a diameter of the first sliding portion <NUM>. The second cavity <NUM> includes a first connecting groove 1122a and a second connecting groove 1122b. After the sliding portion <NUM> is connected to the sliding groove <NUM>, the first connecting groove 1122a is connected to the first sliding portion <NUM> correspondingly, and the second connecting groove 1122b is connected to the second sliding portion <NUM> correspondingly. In other words, the first connecting groove 1122a and the first sliding portion <NUM> are at least partially the same in diameter, and the second connecting groove 1122b and the second sliding portion <NUM> are at least partially the same in diameter.

The base <NUM> is further provided with an accommodation cavity <NUM> for accommodating and placing the sliding groove <NUM>. Specifically, the sliding groove <NUM> is detachably connected to the accommodation cavity <NUM> by a fastener.

The accessory <NUM> further includes an extension portion <NUM> connected to the first connecting portion <NUM> and the second connecting portion <NUM>. In this example, the extension portion <NUM> is a fixed support structure. In other examples, it is conceivable that the extension portion <NUM> may be provided with an adjustment mechanism that can adjust relative positions or orientations of the first connecting portion <NUM> and the second connecting portion <NUM>.

The accessory <NUM> includes a tensioning device <NUM> configured to lock the connection to the external structure <NUM>. The tensioning device <NUM> includes an operating member <NUM>, a locking member <NUM>, and a transmission member <NUM>. The operating member <NUM> is operated by an operator. The operating member <NUM> drives the transmission member <NUM> to move so that the locking member <NUM> locks the accessory <NUM> and the external structure <NUM>. Specifically, the locking member <NUM> is provided at one end of the transmission member <NUM>, and the operating member <NUM> is connected at the other end of the transmission member <NUM>. The transmission member <NUM> passes through the first connecting portion <NUM> so that the locking member <NUM> is located on an inner side of the first connecting portion <NUM> and in contact with the external structure <NUM>, and the operating member <NUM> is located on an outer side of the first connecting portion <NUM>. The locking member <NUM> may be made of a rigid material or a flexible and elastic material such as rubber.

As shown in <FIG>, in another example of the present solution, a lighting device <NUM> is provided, and the structure the same as or corresponding to the structure in the previous example is not repeated herein. For brevity, only differences between example two and example one are described.

A first auxiliary panel <NUM> and a main panel <NUM> of the lighting device <NUM> are rotatably connected, and a locking damping mechanism <NUM> is provided. Specifically, the first auxiliary panel <NUM> is connected to or formed with a pivot <NUM> with a hollow interior. The main panel <NUM> is connected to or formed with a sleeve <NUM> for connecting the pivot <NUM>, where the sleeve <NUM> has a hollow interior and two open ends. When the first auxiliary panel <NUM> switches between a folded state and a use state, the pivot <NUM> rotates relative to the sleeve <NUM> around an adjustment axis 330a. The sleeve <NUM> includes a first sleeve 311a and a second sleeve 311b connected to two ends of the pivot <NUM>, respectively.

The locking damping mechanism <NUM> is provided between the pivot <NUM> and the sleeve <NUM> and provides a first resistance for the relative movement of the first auxiliary panel <NUM>. In the case where the first resistance is large enough, the locking damping mechanism can lock the first auxiliary panel <NUM> and the main panel <NUM>. The first resistance being large enough means that the first resistance is greater than a preset value determined by a specific structure of the locking damping mechanism <NUM>. Specifically, in the case where the first resistance is greater than the preset value, a rotation force provided by the user and an additional force from the outside on the lighting device <NUM> are much less than the resistance so that the locking damping mechanism <NUM> locks the first auxiliary panel <NUM> and the main panel <NUM>.

The locking damping mechanism <NUM> includes an adjustment member <NUM> configured to adjust a magnitude of the resistance provided by the locking damping mechanism <NUM>. The adjustment member <NUM> is disposed at one end of the first sleeve 311a or one end of the second sleeve 311b. The adjustment member <NUM> is formed with an operating portion <NUM> disposed on an outside of the sleeve and an abutting portion <NUM> extending into the sleeve <NUM>. The operating portion <NUM> may be a knob, a wrench, or similar operable members. The abutting portion <NUM> may abut against other structures of the sleeve <NUM> in a certain state. In this example, the adjustment member <NUM> is disposed at an outer end of the second sleeve 311b and can close an opening of the second sleeve 311b. The adjustment member <NUM> is connected to or formed with an adjustment rod <NUM> that can move according to the rotation of the adjustment member <NUM>. Specifically, one end of the adjustment rod <NUM> is fixed in the abutting portion <NUM> and the other end of the adjustment rod <NUM> passes through the second sleeve 311b and extends into the pivot <NUM>.

The locking damping mechanism <NUM> further includes a damper piece, where the damper piece includes a first damper piece <NUM> and a second damper piece <NUM>. The first damper piece <NUM> mates with the adjustment piece <NUM> for the user to adjust a resistance between the main panel <NUM> and the first auxiliary panel <NUM>. Specifically, the first damper piece <NUM> includes a first fixed member <NUM> and a first driven member <NUM> that mate with each other. A first end of the first fixed member <NUM> is connected to a second end of the second sleeve 311b, and a second end of the first fixed member <NUM> passes through an opening of the second end of the second sleeve 311b and is fixedly connected to one end of the pivot <NUM>. Specifically, the second end of the first fixed member <NUM> is fixedly connected to the pivot <NUM> by a fastener. The first end of the first fixed member <NUM> abuts against the abutting portion <NUM> of the adjustment member <NUM> in a certain state. The first driven member <NUM> is movably disposed in one end of the hollow pivot <NUM>. The first end of the first fixed member <NUM> is disposed in a hollow part of the pivot <NUM>, and the second end of the first fixed member <NUM> is close to an edge of the second sleeve 311b and the first fixed member <NUM>. Specifically, the second end of the second sleeve 311b is formed with a convex edge, that is, a diameter of the opening of the second end is less than a diameter of the second sleeve 311b so that part of the first fixed member <NUM> and the first driven member <NUM> can clamp the convex edge. Through and aligned connecting holes <NUM> are provided in the middle of the first fixed member <NUM> and the first driven member <NUM>, the adjustment rod <NUM> passes through the connecting holes <NUM>, and an end of the adjustment rod <NUM> is connected to the first driven member <NUM>. The end of the adjustment rod <NUM> is formed with a thread, and correspondingly, the connecting hole <NUM> of the first driven member <NUM> is formed with a thread or connected to an accessory with a thread so that the first driven member <NUM> is connected to the adjustment rod <NUM> and rotates as the adjustment rod <NUM> rotates. A gasket <NUM> is further provided between the first fixed member <NUM> and the first driven member <NUM> and the convex edge and may especially be made of a flexible material so as to improve friction damping. The specific use process is as follows: the user operates the operating portion <NUM> of the adjustment member <NUM> to rotate so that the adjustment member <NUM> advances along the adjustment axis 330a toward the sleeve <NUM>, and the adjustment member <NUM> drives the adjustment rod <NUM> to rotate; when the abutting portion <NUM> moves and abuts against the first fixed member <NUM>, or when the operating portion <NUM> abuts against the edge of the second sleeve 311b, the adjustment member <NUM> and the adjustment rod <NUM> stop moving along the adjustment axis 330a and can only move around the adjustment axis 330a at a fixed position. At this time, the first driven member <NUM> moves on the adjustment rod <NUM> along the thread and the adjustment axis 330a toward the adjustment member <NUM> so that the first driven member <NUM> slowly approaches the first fixed member <NUM>, and the first driven member <NUM> and the first fixed member <NUM> clamp the second sleeve 311b and the pivot <NUM>, thereby achieving the damping effect between the main panel <NUM> and the first auxiliary panel <NUM>.

The pivot <NUM> is formed with a first cavity <NUM> and a second cavity <NUM>, where the first damper piece <NUM> and the second damper piece <NUM> are disposed in the first cavity <NUM> and the second cavity <NUM>, respectively, and the first cavity <NUM> and the second cavity <NUM> may be interconnected or divided. The first cavity <NUM> is provided with a connecting portion 3211a, the connecting portion 3211a is formed with a special-shaped groove, the first fixed member <NUM> is connected to the connecting portion 3211a through a groove in a corresponding shape, and the groove of the first fixed member <NUM> is fixedly connected to the groove of the connecting portion 3211a by a fastener. The fixed connection here is described relative to the first driven member <NUM> rather than a connection and assembly relationship in which members are never detachable or are integrally formed. In fact, the first fixed member <NUM> is a detachable member which is a fixed structure connected via another member. In other examples, the first fixed member <NUM> and the connecting portion 3211a may be connected in other manners, which is not limited herein.

The second damper piece <NUM> is at least partially disposed in the second cavity <NUM> and configured to provide a second resistance for the rotation of the first auxiliary panel <NUM> relative to the main panel <NUM> in normal use, where the resistance can hinder, to a certain degree, the smooth and rapid rotation between the first auxiliary panel <NUM> and the main panel <NUM>, but does not completely lock the first auxiliary panel <NUM> and the main panel <NUM>. It is to be understood that the second resistance is always less than the preset value. The second damper piece <NUM> can provide the resistance for the rotation of the first auxiliary panel during daily use and ensure that the first auxiliary panel stops at a position. In conjunction with the first damper piece <NUM>, the second damper piece <NUM> can increase the service life and increase and adjust the stability of the first auxiliary panel <NUM> at this position in a special scenario, where the special scenario refers to situations such as external vibration or the whole machine in motion. In this example, the second resistance is constant and cannot be easily adjusted. A resistance value of the second damper piece <NUM> can be adjusted separately after the entire device is disassembled, but an adjustment device is not provided after the lighting device <NUM> is assembled.

The second damper piece <NUM> includes a second fixed member <NUM> and a second driven member <NUM>. The second fixed member <NUM> and the second driven member <NUM> can move relative to each other, and an elastic piece <NUM> provides the second resistance for the relative movement. The second fixed member <NUM> and the second driven member <NUM> are connected to the sleeve <NUM> and the pivot <NUM>, respectively, thereby converting the second resistance into a resistance between the sleeve <NUM> and the pivot <NUM> and then into the resistance between the first auxiliary panel <NUM> and the main panel <NUM>. Specifically, the second fixed member <NUM> is connected to the first sleeve 311a, and the second driven member <NUM> is connected to the pivot <NUM>. In this example, the second fixed member <NUM> is provided with a connecting hole, and the first sleeve <NUM> is also provided with a connecting hole at a corresponding position. A fastener passes through the connecting holes of the second fixed member <NUM> and the first sleeve <NUM> and connects the second fixed member <NUM> to the first sleeve <NUM>. In other examples, the second fixed member <NUM> may be detachably connected to the first sleeve <NUM>, which is not limited herein. To enhance the stability of the connection, an intermediate member <NUM> is further provided between the second driven member <NUM> and the pivot <NUM>. In this example, the second driven member <NUM> is provided with a connecting hole, and the intermediate member <NUM> is also provided with a connecting hole at a corresponding position. A fastener passes through the connecting holes of the second driven member <NUM> and the intermediate member <NUM> and connects the second driven member <NUM> to the intermediate member <NUM>. In other examples, the second driven member <NUM> may be detachably connected to the intermediate member <NUM>, which is not limited herein. Further, a through hole <NUM> is formed in a middle of the second driven member <NUM>. The second damper piece <NUM> further includes a sleeve <NUM>, and the second fixed member <NUM> and the second driven member <NUM> are sleeved on the sleeve <NUM> and rotate relative to the sleeve <NUM>. The sleeve <NUM> is further provided with multiple fixing rings, and one of the multiple fixing rings is disposed between the second fixed member <NUM> and the second driven member <NUM> so that an interval exists between the second fixed member <NUM> and the second driven member <NUM>. One of the multiple fixing rings is disposed at one end of the sleeve <NUM>, and the elastic piece <NUM> is disposed between a resistance piece and the fixing ring.

The intermediate member <NUM> and the pivot <NUM> are connected and, in particular, detachably connected. The pivot <NUM> is provided with multiple connecting ribs <NUM>, and the connecting ribs <NUM> are protrusions formed on an inner wall of the pivot <NUM>. Correspondingly, multiple connecting grooves <NUM> corresponding to the connecting ribs <NUM> in shape are provided on the intermediate member <NUM>. When the intermediate member <NUM> is connected to the pivot <NUM>, the connecting grooves <NUM> are sleeved on the connecting ribs <NUM>. At least two or three connecting ribs <NUM> are provided. In this example, five connecting ribs <NUM> are provided and evenly distributed on the inner wall of the pivot <NUM>. Further, a through hole <NUM> is formed in a middle of the intermediate member <NUM>, the through hole <NUM> corresponds to the through hole <NUM> in position, and a channel formed by the through holes <NUM> and <NUM> is used for a cable <NUM> in the lighting device <NUM> to pass through. In this example, since the cable extends from a middle of the pivot <NUM> to a peripheral side of the first auxiliary panel <NUM>, the through hole <NUM> further has an upward opening, making the through hole <NUM> closer to a groove in shape. Specifically, the second driven member <NUM> may further be provided with notches <NUM>, where the notches <NUM> have the same shape as the connecting ribs <NUM> and are connected to the connecting ribs <NUM> so that the second driven member <NUM> and the pivot <NUM> are connected more stably.

In this example, a biasing member <NUM> is further provided between the intermediate member <NUM> and the pivot <NUM> and configured to assist in the assembly of the second damper piece <NUM> and the intermediate member <NUM>. Specifically, one end of the biasing member <NUM> abuts against the intermediate member <NUM>, and the other end of the biasing member <NUM> abuts against the inner wall of the pivot <NUM>. The biasing member <NUM> provides the second damper piece <NUM> a force that makes the second damper piece <NUM> move toward the first sleeve 311a so that it is ensured that when the second damper piece <NUM> is installed in the pivot <NUM>, the second fixed member <NUM> is close to the first sleeve 311a and is convenient for connection. In this example, a partition is provided between the first cavity <NUM> and the second cavity <NUM>, and one end of the biasing member <NUM> abuts against the partition.

A first end of the first sleeve 311a is connected to the second damper piece <NUM>, and a second end of the first sleeve 311a is provided with an end cover <NUM> for closing the first sleeve 311a. The end cover <NUM> is formed with an accommodation cavity <NUM>, and the accommodation cavity <NUM> at least partially extends into a hollow part of the first sleeve 311a. The accommodation cavity <NUM> is provided with a terminal <NUM>. The cable <NUM> is segmented. One section of the cable <NUM> extends in the pivot <NUM> and is connected to a first end of the terminal <NUM>. Another section of the cable <NUM> is connected to a second end of the terminal <NUM>, enters the first sleeve 311a from the accommodation cavity <NUM>, and finally is connected to the circuit board in the base through the main panel <NUM>.

The main panel <NUM> is further connected to or formed with a second handle <NUM> which may particularly be used for transporting the lighting device <NUM> in a folded state. The second handle <NUM> may rotate relative to the main panel <NUM>. The second handle <NUM> includes two connecting arms <NUM> and a grip connected to the connecting arms <NUM>. The connecting arm <NUM> is in a shape of a sleeve. A first connecting arm of the two connecting arms <NUM> is provided between the adjustment member <NUM> and the second sleeve 311b. Moreover, the adjustment member <NUM> can also lock the rotation of the second handle <NUM>. A second connecting arm of the two connecting arms <NUM> is provided between the end cover <NUM> and the first sleeve 311a.

Claim 1:
A lighting device (<NUM>), comprising:
a base (<NUM>) extending substantially along a first plane (P1);
a panel assembly (<NUM>) at least partially connected to the base (<NUM>) and comprising a luminous body; and
a power supply assembly (<NUM>) configured to power the panel assembly (<NUM>);
wherein the panel assembly (<NUM>) comprises a main panel (<NUM>) extending substantially along a second plane (P2), a first auxiliary panel (<NUM>), a second auxiliary panel (<NUM>), and a third auxiliary panel (<NUM>), the main panel (<NUM>) is fixedly connected to the base (<NUM>), the first auxiliary panel (<NUM>) is rotatably connected to the main panel (<NUM>) about a first axis (100a), the second auxiliary panel (<NUM>) is rotatably connected to the first auxiliary panel (<NUM>) about a second axis (100b), and the third auxiliary panel (<NUM>) is rotatably connected to the first auxiliary panel (<NUM>) about a third axis (100c);
wherein each of the main panel (<NUM>), the first auxiliary panel (<NUM>), the second auxiliary panel (<NUM>), and the third auxiliary panel (<NUM>) is configured for emitting light; and
wherein the first axis (100a) is substantially parallel to the first plane (P1) and is substantially parallel to the second plane (P2), and wherein the second axis (100b) is substantially perpendicular to the first axis (100a);
characterized in that
the third axis (100c) is substantially perpendicular to the first axis (100a) and is substantially parallel to the second axis (100b).