LED lighting fixtures

Abstract

This application relates to the lighting equipment technical field and relates to an LED lighting fixture. The LED lighting fixture includes a light source unit, a power supply module electrically connected to the light source unit, a cover covering the light-emitting side of the light source unit, a ceiling hook used for external electrical connection, a mounting body with a cross-sectional difference, and multiple lamp plates, the height of which near the center of the LED lighting fixture is lower than the height of the mounting body near the periphery of the LED lighting fixture, with both ends of the lamp plates disposed at both ends of the mounting body and having different cross-sectional heights. This provides a larger light output range, reduces the dark area in the center of the LED lighting fixture, and is advantageous for uniform light output from the LED lighting fixture.

Description

[Technical Field]

[0001] The present application belongs to the technical field of lighting devices, and in particular to LED lighting fixtures. [Background technology]

[0002] LED lighting fixtures are widely used in a variety of places due to their easy installation and maintenance, power saving, high brightness and small volume. Their core component, the light-emitting diode (LED), is used as a next-generation solid-state energy source and has advantages such as a long lifespan, efficient energy saving and environmental friendliness.

[0003] However, in the prior art, the surface on which some LED lighting fixtures need to be mounted is usually via a mounting member, and the mounting member is usually located in the center of the LED lighting fixture and occupies some of the internal space of the LED lighting fixture, so the location occupied by the LED lighting fixture has insufficient illumination, leaving dark areas on the light-emitting side of the LED lighting fixture, resulting in uneven light output from the LED lighting fixture.

[0004] Furthermore, conventional LED lighting fixtures have the problem of inconvenient installation to ceiling hooks. Specifically, when installing a ceiling light to a ceiling hook, the globe must first be removed, and then the LED lighting fixture and ceiling hook are connected, and then the globe must be installed. This makes installation inconvenient, and the lamp cover may be deformed or damaged due to excessive force being applied during the installation process.

[0005] As described above, in view of the shortcomings and defects of conventional ceiling hooks, how to design an LED lighting fixture that can be installed without removing the lamp cover during the installation process, and that provides uniform light irradiation without leaving any dark areas on the light output side, is a technical problem that those skilled in the art are trying to solve. Summary of the Invention

[0006] This Abstract will describe many embodiments of the present application. However, this application is intended to describe only some of the embodiments disclosed herein (whether or not claimed in the utility model registration claims), and is not a complete description of all possible embodiments. It has been described above that several embodiments of each feature or aspect of the present invention can be integrated in different ways to form an LED lighting fixture or part thereof.

[0007] The present application provides a new LED lighting fixture and features of each aspect to solve the above problems.

[0008] The present application provides an LED lighting fixture.

[0009] An LED lighting device, characterized by comprising the following steps:

[0010] An LED lighting fixture, comprising: a mounting bottom and a housing side, the housing side surrounding the mounting bottom and forming a first storage space and a housing opening with the mounting bottom; the mounting bottom having a protrusion protruding toward the housing opening, the protrusion forming a second storage space together with a plane on which the mounting bottom is located; a mounting main body provided in the first storage space, having a gap between it and the mounting bottom and forming a third storage space, the mounting main body including a first mounting portion and a second mounting portion; a cover provided on the housing opening; and a light source provided on the mounting main body, emitting light toward the cover and configured to emit light toward the first mounting portion. The LED lighting fixture includes a light source unit including a first group of light sources provided in a mounting unit and a second group of light sources provided in the second mounting unit, a power supply module provided in a third storage space and electrically connected to the light source unit, and a hook ceiling provided in the second storage space and electrically connected to an external power source and the power supply module, suitable for fixing the LED lighting fixture to a mounting surface, wherein the first mounting unit and the mounting bottom have a first distance, and the second mounting unit and the mounting bottom have a second distance, the second mounting unit is closer to the protrusion than the first mounting unit, and the first distance is greater than the second distance.

[0011] Optionally, the mounting base has a central region and the protrusion is located in the central region.

[0012] Optionally, the mounting base is circular and the protrusion includes the center of the circle.

[0013] Optionally, the mounting body further includes a transition portion connecting the first mounting portion and the second mounting portion, and the transition portion is provided with a reflecting portion for reflecting light emitted from the light source portion toward the central region of the housing.

[0014] Optionally, the light source unit includes a lamp plate, and the first light source group and the second light source group are provided on the lamp plate and covered within the cover.

[0015] Optionally, the ramp plate is a flexible circuit sheet, and the ramp plate extends through a first mounting portion, a transition portion, and a second mounting portion.

[0016] Alternatively, the light source unit may include a first lamp plate installed on the first mounting portion and a second lamp plate installed on the second mounting portion, and the first lamp plate and the second lamp plate are annular and are installed with the protrusion portion as their center.

[0017] As an option, the first mounting portion and the second mounting portion each have one annular lamp plate, and the lamp plate in the first mounting portion and the lamp plate in the second mounting portion are arranged concentrically.

[0018] Optionally, the hook ceiling includes a base member, a cover member, and an attachment portion, the base member is connected and fixed to the cover member, and at least a portion of the attachment portion is accommodated in an internal space formed by the base member and the cover member, and at least a portion of the attachment portion protrudes from the cover member.

[0019] Optionally, the mounting portion includes a first mounting member and a second mounting member, the first mounting member and the second mounting member being connected via a locking tooth structure, and the first mounting member being at least partially received in the cover member and at least partially protruding from the cover member.

[0020] Optionally, the mounting portion may further include a third mounting member, and when the second mounting member moves toward the third mounting member and presses the third mounting member, the third mounting member moves in a direction away from the axis of the LED lighting device.

[0021] Optionally, the third mounting member includes a first limiting portion, the first limiting portion being a protrusion provided on both sides of the third mounting member, the base member having a first stopper portion and a second stopper portion, the first limiting portion being provided between the first stopper portion and the second stopper portion of the base member, and the first limiting portion being horizontally movable between the first stopper portion and the second stopper portion of the base member.

[0022] Optionally, a second elastic member may be provided between the first stopper portion and the second stopper portion, and when the third mounting member is not subjected to an external force, the second elastic member is not subjected to the external force, and the first limiting portion contacts the second stopper portion due to the elastic force of the second elastic member, and when the third mounting member is subjected to a pushing force from the second mounting member, the first limiting portion moves in a direction toward the first stopper portion.

[0023] Optionally, the first stopper portion includes a second fixing portion, the second fixing portion protruding and extending toward the second stopper portion, one end of the second elastic member is fitted onto the second fixing portion, and the other end of the second elastic member is engaged with a first engagement groove portion of the third mounting member.

[0024] Optionally, the first mounting member includes a first position limiting member, the first position limiting member contacting the cover member, and the first position limiting member engaging with the cover member.

[0025] Optionally, when installing the LED lighting fixture, the cover member includes a mounting fitting, the mounting fitting includes a plurality of first fitting members, the first fitting members extend toward the base member, there is a gap between two adjacent first fitting members, and the first position limiting member of the first mounting member is engaged between two adjacent first fitting members.

[0026] Optionally, the second mounting member includes a plurality of second engagement members, and a third engagement portion is provided at an end of the first fitting member, the third engagement portion engages with the second engagement members, the third engagement portion has a slope, and the slope angle is the same as the slope angle of the second engagement members.

[0027] Optionally, when mounting an LED lighting fixture, the first mounting member moves toward the mounting surface, generating a pushing force on the second mounting member, the second mounting member receives the force and moves toward the mounting surface, the second engaging member originally located in the third engaging portion is pushed out, and after the pushing force is removed, the second mounting member moves toward the side away from the mounting surface, and the second engaging member is engaged between the two mounting fitting members, at this time the second mounting member does not exert a pushing force on the third mounting member, and the third mounting member moves toward the axis of the LED lighting fixture.

[0028] Optionally, when mounting the LED lighting fixture, the first surface of the protrusion of the base is pressed against the first mounting member, causing the first mounting member to move in a direction toward the mounting surface, the first mounting member generating a pushing force on the second mounting member, the second mounting member receiving the force and moving toward the mounting surface, the second engaging member originally located between the two mounting fitting members being pushed out, and after the external force is removed, the second mounting member moves toward the side away from the mounting surface, and the second engaging member engages with the third engaging portion, at which time the second mounting member generates a pushing force on the third mounting member, causing the third mounting member to move in a direction away from the LED axis.

[0029] The LED lighting fixture of the present invention utilizes the height difference of the support member to install the lamp plate, which provides a larger light output range, reduces the dark area in the middle of the LED lighting fixture, and is advantageous in making the light output of the LED lighting fixture uniform.

[0030] In order to make the above objects, features and advantages of the present invention more apparent, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. [Brief explanation of the drawings]

[0031] [Figure 1] FIG. 1 is a schematic cross-sectional view of an LED lighting fixture according to the prior art. [Figure 2] 1 is a schematic diagram showing a combination of a cross-sectional view and a plan view of an LED lighting device according to the present application. [Figure 3] 1 is a schematic diagram showing a combination of a cross-sectional view and a plan view of an LED lighting device according to the present application. [Figure 4] 1 is a plan view showing a partial configuration of an LED lighting fixture according to the present application. [Figure 5] 1 is a schematic cross-sectional view showing an LED lighting fixture according to an embodiment of the present application. [Figure 6] FIG. 5B is an enlarged schematic view showing the enlarged structure of FIG. 5A. [Figure 7] 1 is a schematic cross-sectional view showing an LED lighting fixture according to an embodiment of the present application. [Figure 8] 9 is an enlarged schematic view showing the enlarged structure of B in FIG. 8. FIG. [Figure 9] FIG. 5 is a schematic diagram showing a hook ceiling structure of an LED lighting fixture. [Figure 10] FIG. 5 is a schematic diagram showing a hook ceiling structure of an LED lighting fixture. [Figure 11] 5 is an exploded perspective view showing the hook ceiling structure of the lighting fixture in the LED. [Figure 12] 12 is a schematic diagram showing the structure of a first mounting member of the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 13]12 is a schematic diagram showing the structure of a first mounting member of the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 14] 12 is a schematic diagram showing the structure of a second mounting member of the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 15] 12 is a schematic diagram showing the structure of a second mounting member of the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 16] 12 is a schematic diagram showing the structure of a third mounting member of the ceiling-mounted hooking receptacle in FIG. [Figure 17] 12 is a schematic diagram showing the structure of a third mounting member of the ceiling-mounted hooking receptacle in FIG. [Figure 18] 12 is a schematic diagram showing the structure of the cover member of the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 19] 12 is a schematic diagram showing the structure of the cover member of the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 20] 12 is a schematic diagram showing the structure of the base member of the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 21] 12 is a schematic cross-sectional view showing the cross-sectional structure of the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 22] 12 is a schematic diagram showing a state in which the cover member is removed from the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 23] 12 is a schematic diagram showing a state in which the cover member is removed from the ceiling-mounted hooking receptacle in FIG. 11. FIG. [Figure 24] FIG. 5 is a schematic diagram showing a hook ceiling structure of an LED lighting fixture. DETAILED DESCRIPTION OF THE INVENTION

[0032] To facilitate understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the present application. However, the present application may be embodied in many different forms and is not limited to the embodiments described below. On the contrary, the purpose of providing these examples is to facilitate a more thorough and comprehensive understanding of the disclosure of the present application. Hereinafter, directions such as "axial," "upward," and "downward" are used to more clearly indicate structural positional relationships and are not intended to limit the present application. In this application, the terms "vertical," "horizontal," and "parallel" are defined to include ±10% variation based on the standard definition. For example, while "vertical" typically refers to a 90-degree angle relative to a reference line, in this application, "vertical" refers to a range of 80 to 100 degrees. Furthermore, the terms "first," "second," and "third" are used for illustrative purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this application, unless otherwise clearly specified or limited, the terms "attached," "connected," and "connection" should be understood in a broad sense, and may refer to, for example, a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or internal communication between two elements. Those skilled in the art can understand the specific meanings of the above terms in this application according to specific circumstances.

[0034] In addition, the technical solutions in each embodiment may be combined with each other, but if the combination of technical solutions is mutually contradictory or cannot be realized based on what a person skilled in the art can realize, such combination of technical solutions shall be deemed to not exist and shall not fall within the scope of protection claimed by this application.

[0035] According to an embodiment of the present application, an LED lighting device is provided, and the structure and operation principle of the LED lighting device will be described in detail below with reference to FIGS.

[0036] Prior to the present invention, the structure of a conventional LED lighting fixture, such as a ceiling light, is generally as shown in FIG. 1. Specifically, the LED lighting fixture has a housing 10, which may be generally columnar, e.g., generally cylindrical. That is, the housing 10 has a closed housing side 13 and two opposing bottoms connected to the housing side 13. Here, one bottom (hereinafter referred to as the mounting bottom 12) is used for adjoining or attaching to a surface to which the LED lighting fixture needs to be attached, and the other bottom (hereinafter referred to as the light-emitting bottom 14) is used for light emission, and the housing may be understood as being open. In other words, the mounting bottom 12 may be understood as the upper bottom of the LED lighting fixture when it is installed, and the light-emitting bottom 14 may be understood as the lower bottom (i.e., the cover 14) when the LED lighting fixture is installed.

[0037] In FIG. 1 , the surface on which the LED lighting fixture needs to be mounted is typically via a ceiling hook 5. The ceiling hook 5 penetrates the mounting bottom 12, exposing at least one side of the ceiling hook 5 to the outside of the housing 10, allowing the LED lighting fixture to be mounted to the required surface via at least one of these sides. For example, it is mounted on the ceiling of a house. Meanwhile, the ceiling hook 5 exposes a portion of the interior of the cavity defined by the housing 10, and this portion occupies the space inside the housing 10. In other words, the housing 10 includes an accommodation space, and at least a portion of the ceiling hook 5 is accommodated within the accommodation space of the housing 10. At least a portion of the ceiling hook 5 may be exposed to the accommodation space of the housing 10. Referring to Figure 5, for example, the ceiling hook 5 may be column-shaped and electrically connected to a pre-installed structure on the surface where the LED lighting fixture needs to be attached. The pre-installed structure may be, for example, a hook structure, which is connected to the ceiling hook 5 to attach the LED lighting fixture to the required surface. The hook 5 may be provided in the central region of the LED lighting fixture. Specifically, for further examples, the "ceiling hook" herein may refer to, for example, Chinese Utility Model No. 217382662 and Chinese Utility Model No. 217382661.

[0038] In practical applications, taking into consideration the balance when installing an LED lighting fixture, the ceiling-mounted hook 5 is usually installed in the center of the housing 10. For example, if the mounting bottom 12 and the light-emitting bottom 14 are both concentric circles, the ceiling-mounted hook 5 may be installed based on the centers of the mounting bottom 12 and the light-emitting bottom 14. Here, "the ceiling-mounted hook 5 is installed based on the centers of the mounting bottom 12 and the light-emitting bottom 14" may be understood as follows: for example, if the ceiling-mounted hook 5 is assumed to be a cylinder or a rectangular parallelepiped, the center of gravity of the cylinder or rectangular parallelepiped ceiling-mounted hook 5 is located on an extension of the line connecting the centers of the mounting bottom 12 and the light-emitting bottom 14. As a result, the light source unit 32 is arranged around the ceiling hook 5, and the light source unit 32 cannot be arranged in the area where the ceiling hook 5 is located. When viewed from the light-emitting bottom 14 of the LED lighting fixture, the middle of the LED lighting fixture forms a relatively dark area, i.e., a dark area, and a relatively uniform light-emitting effect cannot be obtained across the entire LED lighting fixture.

[0039] In view of this, the inventors have designed an LED lighting fixture according to an embodiment of the present invention, which is used to achieve a relatively uniform light output effect and solves at least some of the technical problems. The structure and operating principle of the LED lighting fixture will be described in detail below with reference to Figures 2 and 3.

[0040] In addition, the embodiment of the LED lighting fixture described below also has a housing side 13, an attachment bottom 12, a light-emitting bottom 14, and a ceiling hook 5, as shown in Figure 1, so in the following description, the same symbols as in the embodiment of Figure 1 will be used for corresponding components in the embodiments of Figures 2 and 3.

[0041] 1 to 3 and 5, in the embodiment, the LED lighting fixture comprises a housing 10, an attachment body 18, a cover 14 (i.e., the light-emitting bottom 14), a light source unit 32, and a power supply module 36 connected by electric wires to the light source unit 32. The cover 14 (i.e., the light-emitting bottom 14 or housing opening) is provided on the light-emitting side of the light source unit 32, and a ceiling hook 5 electrically connected to the outside. The ceiling hook 5 may be provided in the center of the LED lighting fixture.

[0042] The housing 10 includes a mounting bottom 12 and housing sides 13. The housing sides 13 surround the mounting bottom 12 and together with the mounting bottom 12 form a first housing space 101 and a housing opening 102. The mounting bottom 12 has a protrusion 16 that protrudes toward the housing opening 102, and the plane on which the protrusion 16 and the mounting bottom 12 are located forms a second housing space 103. The mounting bottom 12 has a central region, and the protrusion 16 is located in the central region. The mounting bottom 12 may be circular, and the protrusion 16 includes the center of the circle.

[0043] The mounting body 18 is provided in the first housing space 101. There is a gap between the mounting body 18 and the mounting bottom 12, and a third housing space 104 is formed. The mounting body 18 includes a first mounting portion 19 and a second mounting portion 20. The mounting body 18 further includes a transition portion 21 connecting the first mounting portion 19 and the second mounting portion 20, and the transition portion 21 is provided with a reflecting portion 23 for reflecting light emitted by the light source unit 32 toward the central region of the housing 14.

[0044] The ceiling-mounted hook 5 is provided in the second accommodation space 103. The ceiling-mounted hook 5 electrically connects an external power source and the power supply module 36, and is suitable for fixing the LED lighting fixture to a mounting surface.

[0045] In some embodiments, the interior of the housing 10 of the LED lighting fixture has a mounting area surrounding the ceiling hook 5, the mounting area being substantially annular, and the annular mounting area is for mounting the light source unit 32. In some embodiments, a mounting body 18 may be provided within the mounting area; in other words, the mounting body 18 is provided on the LED lighting fixture around the ceiling hook 5. The mounting body 18 provides a mounting position for the power supply module 36 to which the light source unit 32 supplies power; here, the power supply module 36 can be understood as a "power supply unit." In other words, the mounting body 18 and the mounting bottom 12 form a third housing space 104, and the power supply module 36 is housed within the third housing space 104 formed by the mounting body 18 and the mounting bottom 12. That is, the power supply module 36 is provided within the third housing space 104. The power supply module 36 may or may not be in contact with the mounting body 18. For example, the power supply module 36 may or may not be in contact with the mounting bottom 12. The power supply module 36 may be attached to the mounting bottom 12 and connected and fixed to the mounting bottom 12. The light source unit 32 may be provided on the outside of the mounting body 18, for example, on the mounting body 18, and further, the light source unit 32 may be provided on the side of the mounting body 18 facing the light-emitting bottom 14, that is, the light-emitting bottom 14 (i.e., the cover 14) may be provided to cover the light-emitting side of the light source unit 32. It can also be said that the cover 14 is provided on the housing opening 102.

[0046] In this embodiment, the mounting body 18 may be formed as a housing having a cavity in which the power supply module 36 is mounted, and since the light source unit 32 is provided in the mounting body 18, the mounting body 18 also functions as a support member. As an example, the mounting body 18 may be formed of, for example, PC (Polycarbonate). In this embodiment, the power supply module 36 includes, for example, a battery pack formed of one or more single cells, and the battery pack is electrically connected to the light source unit 32 provided in the mounting body 18 via a circuit drilled in the mounting body 18, and can supply power to the light source unit 32. In other words, the power supply module 36 is electrically connected to the light source unit 32.

[0047] In an embodiment, the mounting body 18 may have an annular structure extending continuously within the annular mounting region, and the plurality of light source units 32 may be distributed at equal intervals along the mounting body 18. To further explain, for example, if the mounting body 18 has a circular annular structure, the plurality of light source units 32 may be distributed at equal intervals along the circumferential direction of the mounting body 18. Alternatively, there may be a plurality of mounting bodies 18, and the light source units 32 may be distributed at equal intervals along the annular mounting region, in which case each mounting body 18 may be provided with a corresponding light source unit 32.

[0048] The mounting body 18 may have a step. Specifically, in the height direction of the LED lighting fixture, the height of the mounting body 18 near the center of the LED lighting fixture is smaller than the height of the mounting body 18 near the edge of the LED lighting fixture, so that the light source unit 32 can be installed at different heights on the mounting body 18, thereby adjusting the light emission angle and reducing the dark area in the center of the LED lighting fixture.

[0049] The mounting body 18 further includes a transition portion 21 connecting the first mounting portion 19 and the second mounting portion 20, and the transition portion 21 is provided with a reflecting portion 23 for reflecting the light emitted by the light source portion 32 to the central region of the housing 14.

[0050] In an embodiment, the light source unit 32 may include a lamp plate 34 and an LED (Light-Emitting Diode), specifically, an LED chip, and the LED chip may be provided on the lamp plate 34, which may be provided on the side facing the light-emitting bottom 14 of the mounting body 18.

[0051] As shown in FIG. 3 , the light source unit 32 is provided on the mounting body 18. The light source unit 32 emits light toward the cover 14. The light source unit 32 includes a first light source group 321 and a second light source group 322 provided around the center of the LED lighting fixture. Specifically, the light source unit 32 includes the first light source group 321 provided in the first mounting portion 19 and the second light source group 322 provided in the second mounting portion 20. The light source unit includes a lamp plate 34, and the first light source group 321 and the second light source group 322 are provided on the lamp plate 34 and are provided within the cover 14 so as to be covered. Here, the first light source group 321 is arranged around the outer periphery of the second light source group 322 (or the first light source group 321 and the second light source group 322 have a first radius and a second radius, respectively, with the center point of the LED lighting fixture as the center, and the first radius is less than the second radius), and the first light source group 321 and the second light source group 322 have a step (not on the same plane) in the thickness direction of the LED lighting fixture, so that the first light source group 321 and the second light source group 322 can be installed at different heights of the mounting body 18, which can adjust the angle of light and reduce the dark area in the center of the LED lighting fixture.

[0052] In an embodiment, the lamp plate 34 may be a circuit board, such as a printed circuit board. Conductive patterns are pre-cast on the printed circuit board, and these conductive patterns are used to supply power to the LED chips. The lamp plate 34 may be made of an FPC material. In an embodiment, the circuit board (i.e., the lamp plate 34) has two opposing sides, one of which is provided with the conductive patterns for mounting the LED chips, and the other side is attached to the mounting body 18. Such a plate-like circuit board and LED chips can be pre-assembled to form a modularized module. In such a module, the plate-like circuit board occupies a smaller space in the axial direction of the LED lighting fixture.

[0053] The first light source group 321 and the second light source group 322 are provided on the lamp plate 34 and are provided in the light-emitting bottom portion 14 (ie, the cover 14) so ​​as to be covered.

[0054] In an embodiment, the circuit board may be attached to the mounting body 18, for example, by adhesive bonding. Alternatively, the circuit board may be provided with a plurality of positioning holes, and the mounting body 18 may be provided with a corresponding plurality of positioning posts, so that the circuit board can be positioned and fixed to the mounting body 18 such that the positioning posts are inserted into the corresponding positions of the positioning holes.

[0055] As an example, the lamp plate 34 may be provided with multiple LED chips. For example, the multiple LED chips may be arranged in groups, and the LED chips in each group may be arranged along the radial direction of the housing 10, or adjacent LED chip groups may be arranged at equal intervals along the circumferential direction of the housing 10. That is, the multiple LED chips may be distributed radially, or LED chip groups consisting of multiple LED chips may be distributed radially. Here, as shown in FIG. 4, to effectively ensure uniform light output from the LED lighting device, adjacent LED chip groups form the same or approximately the same imaginary angle A, and in each LED chip group, the distance between two adjacent LED chips in the radial direction of the housing 10 is the same. Here, the "imaginary angle" may be understood to mean that a line corresponding to the extension direction in which the adjacent LED chip groups are located extends to the angle formed by the center of the housing 10.

[0056] In this embodiment, the lamp plate 34 may be rectangular. Furthermore, one end of the lamp plate 34 in the longitudinal direction may face the center of the LED lighting fixture, and the other end may face the edge of the LED lighting fixture. As described above, the LED lighting fixture in this embodiment may include multiple lamp plates 34, each of which may be identical or substantially identical in size. The multiple lamp plates 34 may be mounted on the mounting body so that they are identical or substantially identical. The ends of the lamp plate 34 are respectively mounted on the stepped ends of the mounting body. That is, the ends of the lamp plate 34 are not flush with each other, thereby forming the first light source group 321 and the second light source group 322. The first light source group 321 and the second light source group 322 are positioned at different heights, thereby adjusting the light angle and reducing the dark area in the center of the LED lighting fixture.

[0057] 4, the ends of the lamp plates 34 that are closer to the center of the LED lighting fixture may be arranged on the same circumference of circle A, and the ends of the lamp plates 34 that are closer to the edge of the LED lighting fixture may be arranged on the same circumference of circle B, and circles A and B may be concentric circles. In this embodiment, each lamp plate 34 may include at least two LED chips (i.e., light source units 32 in FIG. 4).

[0058] The LED chips at both ends of the at least two LED chips may be provided at both ends of the lamp plate 34 in the longitudinal direction. Furthermore, the LED chips on each lamp plate 34 may be arranged in the same or substantially the same manner. Therefore, the LED chips closer to the center of the LED lighting fixture may be arranged on the same circumference of circle C, and the LED chips closer to the edge of the LED lighting fixture may be arranged on the same circumference of circle D, and circles C and D may be concentric circles (FIG. 4). Furthermore, the LED lighting fixture may have two light source groups, i.e., a first light source group 321 and a second light source group 322, to increase the light emission range. The LED chips may have the same or different color temperatures, thereby adjusting the color temperature of the overall light.

[0059] FIG. 2 is a schematic diagram showing a combination of a cross-sectional view and a plan view of an LED lighting fixture. The cross-sectional view of the LED lighting fixture is taken along a plane passing through the axis of the housing 10 of the LED lighting fixture, and therefore FIG. 2 shows a cross-section of the mounting body 18. Referring to FIG. 2, the mounting body 18 includes a first mounting portion 19 and a second mounting portion 20 located radially inward of the first mounting portion 19. The first mounting portion 19 and the second mounting portion 20 have a step. A first distance L1 exists between the first mounting portion 19 and the mounting bottom 12, and a second distance L2 exists between the second mounting portion 20 and the mounting bottom 12. The second mounting portion 20 is closer to the protrusion 16 than the first mounting portion 19, and the first distance L1 is greater than the second distance L2.

[0060] In the embodiment, not only is a first light source group 321 provided in the first mounting portion 19, but a second light source group 322 is also provided in the second mounting portion 20. In other words, by providing light source portions 32 on the side of both the first mounting portion 19 and the second mounting portion 20 facing the light-emitting bottom portion 14, a light source that emits light through multiple regions is provided, thereby making the light emission of the entire LED uniform.

[0061] The power supply module 36 is disposed in a third housing space 104 formed by the mounting body 18 and the mounting bottom 12. In this embodiment, the third housing space 104 includes a first section 24 and a second section 25. At least a portion of the power supply module 36 is disposed within the first section 24, thereby locating the power supply module 36 on the non-light-emitting side of the LED lighting fixture and eliminating the influence of the power supply module 36 on the LED lighting fixture. For example, the power supply module 36 may be disposed entirely within the first section 24, thereby reducing the impact of heat dissipated by the power supply module 36 on electrical components disposed on the surface of the second section 25. Alternatively, for example, a portion of the power supply module 36 may be disposed within the first section 24 and another portion within the second section 25, thereby distributing the power supply module 36 evenly and allowing for more uniform heat dissipation. In the embodiment, the light source unit 321 provided in the first mounting portion 19 and the light source unit 322 provided in the second mounting portion 20 may share the same lamp plate 34, and this lamp plate 34 may extend along the surface of the first mounting portion 19 and extend on the surface of the second mounting portion 20. The power supply module 36 is electrically connected to the lamp plate 34 and supplies power to the lamp plate 34.

[0062] As another option, in the embodiment, the first light source group 321 provided in the first mounting portion 19 and the second light source group 322 provided in the second mounting portion 20 may be arranged on two circuit boards, respectively, and these two circuit boards may be electrically connected via wiring (e.g., conductors), and both may be supplied with power from the power supply module 36.

[0063] In one embodiment, the use of the second mounting portion 20 provides an additional installation position for the additional light source unit 322 (i.e., the second light source group 322), thereby increasing the light emission range of the light source near the ceiling hook 5 and effectively reducing the dark area in the center compared to the conventional LED lighting fixture shown in Figure 1. The specific configuration of the second mounting portion 20 will be described in detail below.

[0064] Furthermore, in this embodiment, the second mounting portion 20 may be divided into different regions based on differences in the axial dimension of the housing 10 (i.e., the "height" shown in FIG. 2). Specifically, as shown in FIG. 2, the second mounting portion 20 includes a transition portion 21 and a second mounting structure portion 22. The three portions, the first mounting portion 19, the transition portion 21, and the second mounting structure portion 22, are connected in order and arranged from the radially outer side of the housing 10 toward the radially inner side of the housing 10. In other words, the three portions, the first mounting portion 19, the transition portion 21, and the second mounting structure portion 22, are installed so as to gradually approach the ceiling-mounted fixture 5. In other words, on the same side of the LED axis, the transition portion 21 is located radially inner of the first mounting portion 19, and the second mounting structure portion 22 is located radially inner of the transition portion 21, and the second mounting structure portion 22 is closest to the ceiling-mounted fixture 5. In other words, the transition portion 21 may be located between the first mounting portion 19 and the second mounting structure portion 22 .

[0065] In this embodiment, as described above, the light source unit 32 is provided not only on the surface of the first mounting portion 19 but also on the surface of the second mounting portion 20. Here, the light source unit 32 is provided on the surface of the second mounting structure 22. Here, the power supply module 36 may be at least partially provided within the third housing space 104 formed by the mounting body 18 and the mounting bottom 12. This allows the power supply module 36 to be installed on the non-light-emitting side of the LED lighting fixture, minimizing the impact of the power supply module 36 on the LED lighting fixture. In an embodiment, the first light source group 321 provided on the first mounting portion 19 and the second light source group 322 provided on the second mounting structure 22 can share the same lamp plate 34, thereby facilitating circuit installation and simplifying the structure of the LED lighting fixture. In an embodiment, the lamp plate 34 is a flexible circuit sheet that extends from the outer surface of the first mounting portion 19, straddling the outer surface of the transition portion 21, and reaching the outer surface of the second mounting structure 22. In this way, the first mounting portion 19, the transition portion 21, and the second mounting structure portion 22 may be provided with one lamp plate 34, i.e., these three portions share the same lamp plate 34. In other words, the lamp plate 34 is provided extending to the first mounting portion 19, the transition portion 21, and the second mounting portion 22. This can simplify the configuration of the LED lighting fixture.

[0066] In the embodiment, as described above, the transition portion 21 and the second mounting structure portion 22 included in the second mounting portion 20 have a height difference, specifically, the transition portion 21 and the second mounting structure portion 22 included in the second mounting portion 20 have a step in the axial direction of the housing 10, and the height of the transition portion 21 is equal to or greater than the height of the second mounting structure portion 22. In order to better bond the ramp plate 34 to the transition portion 21 and the second mounting structure portion 22, the transition portion 21 has a slope, and the ramp plate 34 can be an FPC soft ramp plate (Flexible Printed Circuit, flexible printed circuit board).

[0067] 2, the second mounting structure 22 has a height lower than that of the first mounting portion 19, i.e., the height of the second mounting structure 22 is at least partially lower than that of the first mounting portion 19. The transition portion 21 can be a transitional portion, i.e., the transition portion 21 plays a continuous transitional role between the first mounting portion 19 and the second mounting structure 22, which is advantageous for, for example, installing a lamp plate 34 of a flexible printed circuit board. In other words, the height of the transition portion 21 can be interposed between the height of the first mounting portion 19 and the height of the second mounting structure 22. As shown in FIG. 2 , the transition section 21 may have an inclined surface 211, one edge of which is connected to the side of the first mounting section 19 facing the light-emitting bottom 14, and the other edge of which is connected to the side of the second mounting structure section 22 facing the light-emitting bottom 14. The height of the inclined surface 211 gradually decreases from the first mounting section 19 to the second mounting structure section 22, thereby forming a better intermediate fit between the first mounting section 19, the transition section 21, and the second mounting structure section 22, and further allowing the lamp plate 34 to fit better with the first mounting section 19, the transition section 21, and the second mounting structure section 22.

[0068] Alternatively, the transition portion 21 may have other types of surfaces, such as curved surfaces, and may also have a gradual decrease in the height of the slope 211.

[0069] In the embodiment, a reflecting portion 23 may be provided on the inclined surface 211, and the reflecting portion 23 can reflect the light irradiated onto the reflecting portion 23 toward the side where the ceiling hook 5 is located, that is, the light is reflected toward the center of the LED lighting fixture through the reflective action of the reflecting portion 23, thereby further reducing the dark area located in the center of the housing 10 of the LED lighting fixture. In the embodiment, the light irradiated onto the reflecting portion 23 is mainly derived from the light emitted by the light source portion 32 provided in the second mounting structure portion 22, and another portion of the light irradiated onto the reflecting portion 23 is light that is diffusely reflected within the housing and heads toward the reflecting portion 23.

[0070] In an embodiment, the reflector 23 may be, for example, a reflective film, such as a highly reflective film, and the highly reflective film may be, for example, a metallic reflective film, an all-dielectric reflective film, or a metal-dielectric reflective film. Alternatively, the reflector 23 may be, for example, a white reflective coating, that is, the inclined surface 211 may be white-coated with a white reflective coating to obtain a white reflective coating. For example, the reflective coating may be a heat reflective coating.

[0071] As another option, referring to FIG. 3 , the second mounting portion 20 has a height that is lower than a portion of the first mounting portion 19. In other words, the height of the second mounting portion 20 is smaller than the height of the first mounting portion 19. As a result, the second mounting portion 20 is connected to the first mounting portion 19 and forms a stepped structure. In the example shown in FIG. 3 , the lamp plate 34 in the first mounting portion 19 and the lamp plate 34 in the second mounting portion 20 may be separate. In this case, the lamp plate 34 may be made of a hard plate. For example, a hard plate such as an aluminum substrate may be used. In one embodiment, the lamp plate 34 may be arc-shaped, i.e., extending along the circumferential direction of the LED lighting fixture. Multiple such lamp plates 34 may be arranged at equal intervals along the circumferential direction of the housing 10 of the LED lighting fixture. In this way, if some conductive patterns on a circular circuit board are damaged, the LED lighting fixture can be maintained by replacing only the lamp plate 34 where the damaged conductive pattern is located, avoiding the need to replace the entire circuit board. 3, the lamp plate 34 may be annular, i.e., one annular lamp plate 34 may be provided on each of the first mounting portion 19 and the second mounting portion 20, and the lamp plate 34 on the first mounting portion 19 and the lamp plate 34 on the second mounting portion 20 may be arranged concentrically. In other words, the light source portion 34 includes a first lamp plate 341 provided on the first mounting portion 19 and a second lamp plate 342 provided on the second mounting portion 20, and the first lamp plate 341 and the second lamp plate 342 are annular and arranged with the protrusion portion 16 as their centers. Furthermore, one annular lamp plate 34 may be provided on each of the first mounting portion 19 and the second mounting portion 20, and the lamp plate 34 on the first mounting portion 19 and the lamp plate 34 on the second mounting portion 20 may be arranged concentrically.Assuming that the distance from the center of the LED lighting fixture to the lamp plate 34 in the first mounting portion 19 is radius R1 (here, R1 is the distance between the inner edge of the lamp plate 34 in the first mounting portion 19 and the center of the LED lighting fixture, i.e., this distance is the inner diameter of the lamp plate 34 in the first mounting portion 19), and the distance from the lamp plate 34 to the center of the LED lighting fixture in the second mounting portion 20 is radius R2 (similar to R1, where R2 is the distance between the inner edge of the lamp plate 34 in the second mounting portion 20 and the center of the LED lighting fixture, i.e., this distance is the inner diameter of the lamp plate 34 in the second mounting portion 20), then R1 > R2. Alternatively, the lamp plate 34 can still adopt an FPC.

[0072] In the example shown in FIG. 3 , a step structure is formed between the first mounting portion 19 and the second mounting portion 20, so that the first mounting portion 19 is at least partially higher than the second mounting portion 20. The first mounting portion 19 has a side facing the ceiling-mounted hook 5, which may adopt an installation method similar to the inclined surface 211 described above, i.e., a reflector 23 is provided on the side. In the example shown in FIG. 3 , the reflector 23 may still be, for example, a reflective film, such as a highly reflective film, or may be selected as another material. The reflector 23 may function as, for example, a reflective coating layer, such as a white reflective coating layer. That is, the side can be painted white with white reflective paint to obtain a white reflective coating layer. This allows light emitted from the light source located at the second mounting portion 20 to be reflected by the reflector 23 and then emitted, reducing light loss when the light source emits light from the second mounting portion 20. Additionally, the light source unit 32 is provided on the second mounting portion 20, specifically, a second light source group 322 of the light source unit 32 is provided on the second mounting portion 20. The light source unit 32 is provided on the first mounting portion 19, specifically, a first light source group 321 of the light source unit 32 is provided on the first mounting portion 19. In other words, the second light source group 322 is provided on the second mounting portion 20, and the first light source group 321 is provided on the first mounting portion 19. The number of lamp chips on the light source unit 32 located on the inside in the radial direction, i.e., the second light source group 322 of the light source unit 32 on the second mounting portion 20, may be the same as the number of chips on the light source unit 32 located on the outside in the radial direction, i.e., the first light source group 321 of the light source unit 32 on the first mounting portion 19, and may be provided in one-to-one correspondence in the circumferential direction, for example. Alternatively, a larger number of light sources, such as LED chips, may be disposed radially outward, i.e., in the first light source group 321, i.e., the number of chips on the first light source group 321 is greater than the number of chips on the second light source group 322. That is, the first mounting portion 19 may be provided with a larger number of light sources.

[0073] This "arranged in one-to-one correspondence in the circumferential direction" means that when the number of chips on the light source units 32 located radially inside, i.e., the second light source group 322, is the same as the number of chips on the light source units 32 located radially outside, i.e., the second light source group 322, the light source units 32 located radially inside and the light source units 32 located radially outside are aligned in the radial direction of the housing 10, which simplifies the design and manufacturing process of the LED lighting fixture, reduces the difficulty of designing and manufacturing the LED lighting fixture, improves the design and manufacturing efficiency of the LED lighting fixture, and is advantageous in saving the cost of the LED lighting fixture.

[0074] As another option, when more light source units 32 are provided in the first mounting portion 19, the light source units 32 located radially inward (i.e., the second light source group 322) and the light source units 32 located radially outward (i.e., the first light source group 321) do not have to be aligned in the radial direction of the housing 10; that is, in the circumferential direction of the housing 10, for example, the light source units 32 located radially inward (i.e., the second light source group 322) may be located between adjacent light source units 32 located radially outward (i.e., the first light source group 321). As another option, when the number of light source units 32 located on the inside in the radial direction is the same as the number of light source units 32 located on the outside in the radial direction, the light source units 32 located on the inside in the radial direction and the light source units 32 located on the outside in the radial direction do not have to be aligned in the radial direction of the housing 10. That is, when the number of chips in the second light source group 322 is the same as the number of chips in the first light source group 321, the chips in the second light source group 322 and the chips in the first light source group 321 do not have to be aligned in the radial direction of the housing 10. In other words, the light source units 32 located on the inside in the radial direction and the light source units 32 located on the outside in the radial direction may be offset in the circumferential direction of the housing 10. That is, the corresponding chips in the second light source group 322 and the corresponding chips in the first light source group 321 may be offset in the circumferential direction of the housing 10. In this way, not performing the above-mentioned alignment is advantageous for diversifying the light distribution style of the LED lighting device, and such a circumferential offset is advantageous for further increasing the uniformity of the light emitted from the LED lighting device. In addition, the staggered arrangement is advantageous for forming air convection, which is advantageous for heat dissipation of the LED lighting fixture.

[0075] In order to effectively eliminate dark areas, the ratio of the radial distance between the second light source group 322 (i.e., the inner light source unit 32) and the first light source group 321 (i.e., the outer light source unit 32) to the radius of the LED lighting device is preferably between 0.1 and 0.5. Preferably, the ratio of the radial distance between the second light source group 322 and the first light source group 321 to the radius of the LED lighting device is 0.2 to 0.4, and more preferably, the ratio of the radial distance between the second light source group 322 and the first light source group 321 to the radius of the LED lighting device is 0.25 to 0.38.

[0076] Additionally, in order to effectively eliminate dark areas, the ratio of the distance between the radially outer side of lamp plate 34 where first light source group 321 is located and the edge of the LED lighting fixture to the radius of the LED lighting fixture is preferably 0.1 to 0.5. Preferably, the ratio of the distance between the radially outer side of lamp plate 34 where second light source group 322 is located and the edge of the LED lighting fixture to the radius of the LED lighting fixture is 0.15 to 0.4, and more preferably, the ratio of the distance between the radially outer side of lamp plate 34 where first light source group 321 is located and the edge of the LED lighting fixture to the radius of the LED lighting fixture is 0.2 to 0.3.

[0077] Additionally, in order to similarly effectively eliminate dark areas, when different lamp plates 34 are used for the first light source group 321 and the second light source group 322, the ratio of the distance between the lamp plate 34 on which the first light source group 321 is located and the lamp plate 34 on which the second light source group 322 is located and the radius of the LED lighting fixture is preferably 0.1 to 0.5. Preferably, when different lamp plates 34 are used for the first light source group 321 and the second light source group 322, the ratio of the distance between the lamp plate 34 on which the first light source group 321 is located and the lamp plate 34 on which the second light source group 322 is located and the radius of the LED lighting fixture is between 0.2 to 0.4. More preferably, when different lamp plates 34 are used for the first light source group 321 and the second light source group 322, the ratio of the distance between the lamp plate 34 on which the first light source group 321 is located and the lamp plate 34 on which the second light source group 322 is located and the radius of the LED lighting fixture is 0.25 to 0.38.

[0078] Furthermore, in order to effectively eliminate dark areas, the height of the first mounting portion 19 of the mounting body 18 is preferably 0.1 to 0.5 times the height of the LED lighting fixture. Preferably, the height of the first mounting portion 19 of the mounting body 18 is between 0.2 and 0.4 times the height of the LED lighting fixture. More preferably, the height of the first mounting portion 19 of the mounting body 18 is 0.25 to 0.38 times the height of the LED lighting fixture. Preferably, the second mounting structure 22 (FIG. 2) and the second mounting portion 20 (FIG. 3) of the mounting body 18 occupy 0.1 to 0.3 times the height of the LED lighting fixture. Preferably, the second mounting structure 22 (FIG. 2) and the second mounting portion 20 (FIG. 3) of the mounting body 18 occupy 0.15 to 0.25 times the height of the LED lighting fixture, more preferably, the second mounting structure 22 (FIG. 2) and the second mounting portion 20 (FIG. 3) of the mounting body 18 occupy 0.16 to 0.22 times the height of the LED lighting fixture.

[0079] Although not shown in the drawings, the LED lighting device according to the embodiment of the present application may be installed as follows in addition to the examples shown in FIGS.

[0080] Additionally or alternatively, a circuit board and a light source may be provided on the inclined surface of the second portion, which is advantageous in reducing a dark area in the center of the LED lighting fixture near the inner ring light source. In this example, the circuit board on the inclined surface may be integral with the circuit board on the first portion, or may be a separate circuit board that is electrically connected to the circuit board on the first portion.

[0081] Additionally or alternatively, the shape of the light source portion located radially inward may be different from the shape of the light source portion located radially outward, for example, the light source portion located radially inward may be striped having a certain length in the radial direction, in this way the light source portion located radially inward is advantageous in emitting more light to the dark region in the center, thereby reducing the dark region in the center.

[0082] Additionally or alternatively, the light source unit of the inner ring may have a higher light emission intensity than the light source unit of the outer ring, for example, the light source unit may be an LED chip, and the light source unit of the inner ring may be equipped with an LED chip with a higher power than the light source unit of the outer ring, with the same purpose as improving the overall light emission intensity of the light source unit of the inner ring.

[0083] As another option, the second mounting portion may be formed as an integral structure with the first portion. In addition, the integral structure may be formed as a convex structure that is convex outward from the light-emitting bottom portion (i.e., a convex structure with a raised center and lower sides), and a light source portion may be provided on the convex structure. The convex characteristics of the convex structure are utilized to cause the light source portion provided thereon to diverge outward, and the light source portion located radially inward emits light further radially inward, which is advantageous for reducing the dark area in the center.

[0084] Alternatively, the LED lighting device may include a light guiding unit. Here, the light guiding unit may be provided between the light source unit and the light-emitting bottom portion. In an embodiment, one end of the light guiding unit may abut or cover the light source unit, and the other end of the light guiding unit may abut a central region of the light-emitting bottom portion. In this way, the light guiding unit guides light emitted from the light source unit to the central region of the light-emitting bottom portion and then emits the light from the central region of the light-emitting bottom portion, thereby eliminating the dark region in the central region of the LED lighting device.

[0085] In an embodiment, the light guiding portion may be provided so as to abut against or cover the light source portion of the first portion. In some examples, the light guiding portion may abut against or cover the light source portion of the second mounting portion. The light guiding portion may be, for example, a light guiding member formed of a resin material. The light guiding member may have, for example, a substantially oblique cylindrical shape, with one bottom surface abutting against the light-emitting bottom portion and the other bottom surface abutting against the light source portion, and the axis of the oblique cylinder may be inclined from the bottom surface on the side where the light source portion of the oblique cylinder is located to the bottom surface on the side where the light-emitting bottom portion of the oblique cylinder is located.

[0086] Additionally or alternatively, the mounting body may further include an extension portion that extends from the first portion or the second mounting portion axially outward of the mounting member and may be suspended above the mounting member.

[0087] The extension portion may further be configured as a mounting carrier for the light source portion, i.e., an additional circuit board may be provided on the extension portion and an additional light source portion may be provided on the circuit board, which is further advantageous for the dark area in the center of the LED lighting fixture.

[0088] Additionally or alternatively, the mounting component may serve as a mounting carrier for the light source unit. That is, the side of the mounting component facing the light-emitting bottom portion may be used to mount an additional circuit board, which may then be provided with an additional light source unit. In this example, the mounting component may occupy a larger volume within the housing, allowing for the integration of a single power supply module, thereby powering the light source unit above it. As another option, the mounting component may leave its original volume and allow wiring to be pulled out from the power supply module on the first portion to access the circuit board above the mounting component, thereby supplying power to the light source unit above the circuit board. Because the mounting component faces the central area of ​​the bottom portion, the light source unit above the mounting component can thereby effectively eliminate the dark area in the center of the LED lighting fixture.

[0089] In one embodiment, the bottom of the LED lighting fixture is used to project light emitted from the light source unit out of the LED lighting fixture, so a light-transmitting material is selected for the bottom. Additionally or alternatively, the bottom may be made of multiple different materials. For example, the central region of the bottom may have optimal light transmission, i.e., a material with lower light transmission may be selected for the areas outside the central region, while the remaining areas of the bottom have the same light transmission. Because the central region of the bottom has better light transmission, even if the light irradiating intensity at the central region is lower, this can be compensated for by the better light transmission of the central region.

[0090] As shown in Figures 5 to 8, one embodiment of the present invention provides an LED lighting device. The LED lighting device includes a base 1, a light source unit 32 mounted on the base 1, a power supply unit (not shown) electrically connected to the light source unit 32, a cover 14 covering the light source unit 32 and the power supply unit, and a ceiling hook 5 for electrical connection to the outside. The base 1 and the cover 14 are connected and fixed to form a fourth housing space 105. The light source unit 32 is housed in the fourth housing space 105 formed by the base 1 and the cover 14. The power supply unit supplies the light source unit 32 with power necessary for operation.

[0091] In other embodiments, the light source section 32 may have the light source structure in FIGS.

[0092] Specifically, the base 1 includes a protrusion 11 facing the cover 14, and a second storage space 111 is formed between the protrusion 11 and the plane on which the base 1 is located, and the ceiling-mounted hook 5 is installed in the second storage space 111. The protrusion 11 may include the base 1 and a first surface 112 parallel to the base 1, and the first surface 112 may be flat. When installed, the first surface 112 contacts the ceiling-mounted hook 5.

[0093] As shown in Figures 9 to 11, the ceiling-mounted hooking receptacle 5 may be circular or approximately circular when viewed from the direction of the mounting surface. The ceiling-mounted hooking receptacle 5 includes a base member 51 and a cover member 52, and the base member 51 is connected and fixed to the cover member 52. Specifically, the base member 51 and the cover member 52 can form an internal space by being connected and fitted together via a locking member 55 (e.g., a member such as a screw or bolt). When viewed from the direction of the mounting surface, the base member 51 is circular or approximately circular, and the cover member 52 is circular or approximately circular. The ceiling-mounted hooking receptacle 5 may further include an attachment portion 53 that is at least partially accommodated in the internal space formed by the base member 51 and the cover member 52 and at least a portion of which protrudes from the cover member 52.

[0094] The ceiling-mounted hooking receptacle 5 further includes a connector 54, one end of which is provided in the internal space formed by the base member 51 and the cover member 52, and at least a portion of which protrudes from the cover member 52. The connector 54 may be inserted through the base member 51 or the cover member 52. The electrical connection of the connector 54 electrically connects the ceiling-mounted hooking receptacle 5 to an external power source.

[0095] 9 to 11 and 22 to 24, the ceiling-mounted hooking receptacle 5 may be provided with a stopper 56, which may be provided on the base member 51. The stopper 56 can restrict the relative rotation between the ceiling-mounted hooking receptacle 5 and the base 1 by its stopping action.

[0096] 11, when viewed from the direction of the mounting surface, the mounting portion 53 has a circular or approximately circular shape. The mounting portion 53 includes a first mounting member 531 and a second mounting member 532, and by operating the first mounting member 531, the second mounting member 532 and the first mounting member 531 can be rotated relative to each other. The first mounting member 531 and the second mounting member 532 are connected to each other, and more specifically, the first mounting member 531 and the second mounting member 532 can be connected and engaged via a structure such as a gear structure or a card tooth structure.

[0097] The mounting section 53 may further include the first mounting member 531 and one or more third mounting members 533. When the second mounting member 532 and the first mounting member 531 are rotated relative to each other by operating the first mounting member 531, the first mounting member 531 acts on the second mounting member 532 and the third mounting member 533. Specifically, when the second mounting member 532 moves the third mounting member 533 toward the third mounting member 533, the third mounting member 533 moves horizontally away from the axis of the LED lighting fixture. When the second mounting member 532 moves the third mounting member 533 away from the third mounting member 533, the third mounting member 533 moves horizontally toward the axis of the LED lighting fixture. In other words, the third mounting member 533 moves as the position of the second mounting member 532 changes.

[0098] The ceiling-mounted hook 5 and the LED lighting fixture are connected and fixed via the third mounting member 533. Furthermore, the ceiling-mounted hook 5 can achieve connection between the LED lighting fixture and the ceiling-mounted hook 5 by engaging the third mounting member 533 within the LED lighting fixture. Specifically, when attaching the LED lighting fixture to the ceiling-mounted hook 5, the LED lighting fixture presses the first mounting member 531, which receives an urging force and then moves toward the mounting surface (e.g., a ceiling), causing the first mounting member 531 to generate a force against the second mounting member 532, which moves the ceiling-mounted hook 5 in the height direction. When the second mounting member 532 moves in a direction approaching the mounting surface (e.g., a ceiling), it presses on the third mounting member 533, moving the third mounting member 533 in a direction away from the axis of the ceiling hook 5, and further exposing the third mounting member 533 at least partially outside the ceiling hook 5 and engaging it with the LED lighting fixture, thereby achieving connection and mounting between the ceiling hook 5 and the LED lighting fixture.

[0099] When the second mounting member 53 moves in a direction away from the mounting surface (e.g., a ceiling), the third mounting member 533 moves in the direction of the axis of the ceiling-mounted hook 5, allowing the third mounting member 533 to be retracted and stored within the ceiling-mounted hook 5, and the ceiling-mounted hook 5 can be detached from the LED lighting fixture. In this device, the third mounting member 533 moves in a direction perpendicular to the axis of the ceiling-mounted hook 5 (parallel to the ceiling), thereby connecting and detaching the LED lighting fixture. When the third mounting member 533 is completely placed inside the ceiling-mounted hook 5, the ceiling-mounted hook 5 can be completely positioned inside the LED lighting fixture, and the ceiling-mounted hook 5 can be placed on the third mounting member 533.

[0100] The mounting portion 53 may further include an elastic member 5341 and an elastic member 5342, which may be elastic members such as springs. The elastic member 5341 is connected to and engaged with the second mounting member 532, allowing the second mounting member 532 to move up and down in the height direction of the LED lighting fixture. The elastic member 5342 is connected to and engaged with the third mounting member 533, allowing the third mounting member 533 to move horizontally; specifically, the third mounting member 533 can move horizontally in a direction away from the axis of the LED lighting fixture.

[0101] As shown in FIGS. 11 to 13, the first mounting member 531 may be at least partially housed in the cover member 52. The cover member 52 may include an opening, and the first mounting member 531 may be housed in the opening with a portion exposed to the cover member 52. Specifically, the first mounting member 531 may include a cap member 5311, and when no external force is applied, the cap member 5311 may be exposed to the cover member 52. The first mounting member 531 may further include a barrel 5312, and the barrel 5312 is housed in the cover member 52. The first mounting member 531 may further include a first position limiting member 5314. The first position limiting member 5314 is in contact with the cover member 52. Specifically, the first position limiting member 5314 can engage with the cover member 52, thereby fulfilling the role of position limiting and making it difficult for relative rotation to occur between the first mounting member 531 and the cover member 52.

[0102] The first mounting member 531 further includes a plurality of first engagement portions 5313, which are located at the openings of the first mounting member 531 and may be provided facing the base member 51. Furthermore, the first engagement portions 5313 may have a toothed shape. The first mounting member 531 has a circular or approximately circular shape when viewed from the direction of the mounting surface.

[0103] As shown in FIGS. 11, 14, 15, and 21 to 23, the second mounting member 532 is provided between the base member 51 and the cover member 52. When no external force is applied, the second mounting member 532 and the cover member 52 come into contact with each other. When viewed from the direction of the mounting surface, the second mounting member 532 is circular or approximately circular. The second mounting member 532 includes a plurality of second engagement members 5320. When the first mounting member 531 receives an external force, the first engagement portion 5313 and the second engagement members 5320 come into contact with each other. The second engagement members 5320 may include an engagement surface 5321, which may have a slope. The slope angle is the same or approximately the same as the angle of the three-tooth slope of the first engagement portion 531, allowing the second engagement member 5320 to engage with the first engagement portion 5313. Specifically, when the first mounting member 531 is subjected to an external force, the engaging surface 5321 of the second engaging member 5320 contacts the tooth-shaped slope of the first engaging portion 5313. The second engaging member 5320 may further include a first groove 5322 formed on a side surface of the second engaging member 5320. By providing the first groove 5322, the second engaging member 5320 can have a constant thermal expansion / contraction variable, making it less likely that thickness differences will occur among the multiple second engaging members 5320 due to thermal expansion / contraction during the manufacturing process. Furthermore, since the thicknesses of the second engaging members 5320 on each side around the first groove 5322 are the same or approximately the same, the strength and stability of the second engaging member 5320 can be increased. The second mounting member 532 may also have a surface 5323 formed toward the first mounting member 531. Furthermore, a recess 5324 is formed on the opposite side of the surface 5323. The recess 5324 may include a first fixing portion 5325, which may be used to fix a first elastic member 5341 having elasticity, such as a spring. Specifically, the first fixing portion 5325 may extend toward the base member 52 and have a columnar protrusion, and the first elastic member 5341 may be fitted onto the first fixing portion 5325. In another embodiment, the first fixing portion 5325 may be cylindrical and protrude toward the base member 52, and one end of the first elastic member 5341 may be provided on the first fixing portion 5325.

[0104] As shown in Figures 11, 16, 17, and 21 to 23, in this embodiment, the mounting portion 53 includes two third mounting members 533, which are arranged opposite each other. The third mounting members 533 are attached to the base member 51 and contact the second mounting member 532. The third mounting member 533 may include a pressing portion 5331. When the second mounting member 532 receives an external force and moves toward the base member 51, the second mounting member 532 contacts the pressing portion 5331 of the third mounting member 533 and applies a pressing force to the pressing portion 5331. When the pressing portion 5331 receives a force, it moves in a direction away from the axis of the base member 51. Specifically, the pressing portion 5331 may have an arcuate surface that can fit the outer peripheral surface of the second mounting member 532. The third mounting member 533 may further include a rectangular surface 5335 connected to one end of the extrusion portion 5331. Specifically, the right-angled surface 5335 may be provided in the extension direction of the extrusion portion 5331. The right-angled surface 5335 serves as a stop or limit by coming into contact with the base member 51. The third mounting member 533 may further include first stopper portions 5332 as protrusions provided on both sides of the third mounting member 533. In operation, the first limiting portion 5332 may be provided between the first stopper portion and the second stopper portion of the base member 51 (the base member 51 in FIG. 20 may have a first stopper portion 517 and a second stopper portion 518), and is horizontally movable between the first stopper portion 517 and the second stopper portion 518 of the base member 51. Due to the engagement between the first limiting portion 5332 and the base member 51, the third mounting member 533 can move in a direction away from the axis of the base member after receiving a force, and the stopping action of the first limiting portion 5332 of the third mounting member 533 by the stopper portion of the base member 51 prevents the third mounting member 533 from slipping out of the base member 51. The third mounting member 533 can include a first engaging groove portion 5333, and the second elastic member 5342 can be coupled and fitted with the third mounting member 533 through the first engaging groove portion 5333. Therefore, after the external force is removed, the third mounting member 533 can be restored to its original position through the elasticity of the second elastic member 5342.The third mounting member 533 may have a chamfered surface on the side facing away from the axis of the base member. The inclination of the chamfered surface allows the ceiling hook 5 to engage with the LED lighting fixture body for easier installation. The third mounting member 533 may further include a first contact portion 5336. The first contact portion 5336 contacts the base member 51. To reduce frictional resistance and facilitate sliding of the third mounting member 533 over the base member 51, the first contact portion 5336 may have a mesh structure, thereby reducing the contact area and, therefore, the frictional resistance. The first contact portion 5336 may have another structure that reduces the contact area, thereby reducing frictional resistance and enabling the third mounting member 533 to slide more easily.

[0105] 11, 18, 19, and 21 to 23, the cover member 52 may have an attachment fitting member 522 having a plurality of first fitting members 5220. The first fitting members 5220 extend in a direction toward the base member 51. There is a gap between two adjacent first fitting members 5220, and the first position limiting member 5314 of the first attachment member 531 is locked between the two adjacent first fitting members 5220. To allow the first position limiting member 5314 to smoothly fit between the two adjacent first fitting members 5220, the distance D3 between the two adjacent first fitting members 5220 is equal to or greater than the width D4 of the first position limiting member 5314. To limit the position of the first mounting member 531, the first fitting member 5220 further includes a second groove 5222, and the width D5 of the second groove 5222 is the same or approximately the same as the distance D3 between two adjacent first fitting members 5220, thereby enabling better interaction with the first position limiting member 5314. The first fitting member 5220 includes first arm portions 5223, which are provided on both sides of the second groove 5222, and the direct distance between any two adjacent first arm portions 5223 is the same or approximately the same.

[0106] A third engagement portion 5221 is provided at an end of the first fitting member 5220, and the third engagement portion 5221 engages with the second fitting member 5320. Specifically, the third engagement portion 5221 may have a slope, and the slope angle is the same or approximately the same as the slope angle of the second fitting member 5320. When the first mounting member 531 is not subjected to an external force, the second engagement member 5320 is provided between two adjacent first fitting members 5220. When the first mounting member 531 is subjected to an external force, the second engagement member 5320 is provided in the second groove portion 5222. The width D6 of the second engagement member 5320 is equal to or less than the width D5 of the second groove portion 5222, and the width D6 of the second engagement member 5320 is equal to or less than the distance D3 between two adjacent first fitting members 5220.

[0107] The multiple mounting fitting members 522 are arranged around the center of the cover member 52 and form a first housing portion 524. A first mounting member 531 is housed in the first housing portion 524. When viewed from the direction of the mounting surface, the mounting fitting members 522 are formed in a circular or approximately circular shape with the center of the cover member 52 as the center.

[0108] The lid member 52 may further include one or more second fixing members 521. The lid member 52 is connected and fixed to the base member 51 via the second fixing members 521. In this embodiment, four second fixing members 521 are provided, and the connection between the lid member 52 and the base member 51 is made stronger by fixing at multiple points.

[0109] The cover member 52 may further include one or more first support members 525. The first support members 525 are disposed opposite the third mounting member 533. The first support members 525 are capable of contacting the third mounting member 533 and perform a fixing or supporting function. The first support members 525 do not have to contact the third mounting member 533, and therefore do not apply excessive pressure to the third mounting member 533 and are unlikely to increase the difficulty of moving the third mounting member 533.

[0110] The cover member 52 may further include a third groove portion 523, and a portion of the base member 51 may be provided in the third groove portion 523. In addition, the conducting wire of the ceiling hook 5 can be passed through the third groove portion 523, allowing electrical connection with the LED ceiling light.

[0111] The lid member 52 may further include one or more second support members 526. The second support members 526 may be provided between the two first support members 525, thereby increasing the strength of the entire lid member 52. The second support members 526 may be provided perpendicular to the first support members 525.

[0112] The cover member 52 includes a second housing portion 527. The stopper 56 may be provided in the second housing portion 527.

[0113] 11 and 20 to 23, the base member 51 may include one or more first fixing members 511, and the base member 51 is connected and fixed to the cover member 52 via the first fixing members 511. Specifically, the first fixing member 511 and the second fixing member 521 are connected and fixed by a locking member 55 such as a screw. In this embodiment, four first fixing members 511 are included.

[0114] The base member 51 may have a second arm portion 514 extending toward the cover member 52 .

[0115] The second arm portion 514 is inserted into the third groove portion 523 and cooperates with the third groove portion 523 to pull the conductor out of the ceiling-mounted hooking receptacle 5 .

[0116] As shown in FIG. 23 , the base member 51 may have four first stopper portions 517 and four second stopper portions 518. The four first position limiting portions 5332 of the third mounting member 533 move between the corresponding first stopper portions 517 and second stopper portions 518. A second elastic member 5342 may be provided between the first stopper portions 517 and the second stopper portions 518. When the third mounting member 533 is not subjected to an external force, the second elastic member 5342 is not subjected to the external force, and the first position limiting portions 5332 receive the elastic force of the second elastic member 5342 and come into contact with the second stopper portions 518. When the third mounting member 533 receives a force pushing against the second mounting member 532, the first stopper portions 5332 move toward the first stopper portions 517. To restrict the position of the second elastic member 5342 and prevent it from moving or falling off, the first stopper portion 517 is grooved, and one end of the second elastic member 5342 is sandwiched by the first stopper portion 517. Furthermore, the first stopper portion 517 may include a second fixing portion 5171, which may protrude and extend toward the second stopper portion 517. One end of the second elastic member 5342 is fitted into the second fixing portion 5171, and the other end of the second elastic member 5342 is engageable with the first engagement groove portion 5333 of the third mounting member 533, thereby fixing both ends of the elastic member 534. The second locking portion 518 may include a second engagement groove portion 5181, and the conductor inside the ceiling-mounted hook receptacle 5 may be fixed via the second engagement groove portion 5181.

[0117] 11, 18, 19, and 21 to 23, base member 51 includes recess 515, rib portion 516 is provided around the recess, and third mounting member 533 is provided on rib portion 516 and comes into contact with rib portion 516. The depression effect of the recess reduces the contact area between third mounting member 533 and base member 51, thereby reducing frictional resistance when third mounting member 533 moves.

[0118] The base member 51 includes a third fixing portion 512. The third fixing portion 512 may be used to fix the first elastic member 5341. Specifically, the third fixing portion 513 may be cylindrical and protrude toward the cover member 51. One end of the first elastic member 5341 may be provided on the third member 512, and the other end may be provided on the first fixing portion 5325 of the second mounting member 532, thereby fixing both ends of the first elastic member 5341. The third fixing portion 513 may be a columnar protrusion, and the first elastic member 5341 may be fitted onto the third fixing portion 513.

[0119] The base member 51 includes a second position restricting portion 513, which is parallel or approximately parallel to a right-angled surface 5335 of the third mounting member 533. When the third mounting member 533 is not subjected to an external force, the second position restricting member 513 comes into contact with the right-angled surface 5335 of the third mounting member 533, preventing unnecessary displacement of the third mounting member 533 due to the elastic action of other elastic members such as springs, and fulfilling the role of restricting the position of the third mounting member 533.

[0120] The base member 51 may include one or more third support members 519, which provide structural reinforcement for the base member 51. The third support members 519 may include third engagement grooves 5191, and conductive wires may be provided in the third engagement grooves 5191.

[0121] 24, when the mounting portion 53 of the ceiling-mounted hook 5 is not subjected to external force, the height of the exposed portion of the mounting portion 53 is D1, and the thickness of the ceiling-mounted hook 5 is D2. To ensure that the first and second mounting members 531 and 532 of the mounting portion 53 have sufficient vertical movement space for the ceiling-mounted hook 5, while keeping the thickness of the ceiling-mounted hook 5 as small as possible and ensuring that the thickness of the LED lighting fixture is not too thick, the relationship 0.1≦D1:D2≦0.4 is satisfied. If D1:D2<0.1, the first and second mounting members 531 and 532 of the mounting portion 53 will not have enough vertical movement space for the ceiling-mounted hook 5, resulting in insufficient pressure from the first and second mounting members 531 and 532 on the third mounting member 533. This may prevent the third mounting member 533 from moving horizontally a sufficient distance, preventing the ceiling-mounted hook 5 from achieving its desired mounting / removal effect. If D1:D2<0.5, the thickness of the ceiling hook 5 will be too thick, which will result in the thickness of the LED lighting fixture being too thick. Preferably, 0.15≦D1:D2≦0.35, and more preferably, 0.2≦D1:D2≦0.3.

[0122] As shown in Figures 6, 8, 10, 14, 16, 18 and 21, when installing an LED lighting fixture, the first mounting member 531 of the mounting portion 53 of the ceiling hook 5 is pressed directly via the first surface 112 of the protrusion 11 of the base 1, and the first mounting member 531 is moved toward the mounting surface (e.g., a ceiling), causing the first mounting member 531 to generate a pushing force on the second mounting member 532, and the second mounting member 532 receives the force and moves toward the mounting surface, thereby pushing out the second engaging member 5320 originally positioned at the third engaging portion 5221. After the external force is removed, the elastic action of the first elastic member 5341 causes the second mounting member 532 to move away from the mounting surface, and further, the second engaging member 5320 is engaged between the two mounting fitting members 522. At this time, the second mounting member 532 does not apply a pressing force to the third mounting member 533, and the elastic action of the second elastic member 5342, which is connected to the first engaging groove portion 5333, causes the third mounting member 533 to move in the direction of the axis of the LED lighting fixture, and when the third mounting member 533 is not exposed to the ceiling hook 5, the LED lighting fixture is connected to the ceiling hook 5.

[0123] Then, the first mounting member 531 is pressed again by the first surface 112 of the protrusion 11 of the base 1, and the first mounting member 531 is moved toward the mounting surface, causing the first mounting member 531 to generate a pushing force on the second mounting member 532, and the second mounting member 532 receives the force and moves toward the mounting surface, thereby pushing out the second engaging member 5320 located between the two mounting fitting members 522. After the external force is removed, the elastic action of first elastic member 5341 causes second mounting member 532 to move away from the mounting surface, and due to the structural design in which engagement surface 5321 of second engagement member 5320 engages with third engagement portion 5221, second engagement member 5320 engages with third engagement portion 5221, at which point second mounting member 532 generates a pushing force on third mounting member 533, causing third mounting member 533 to move away from the LED axis and further engage with the LED lighting fixture, connecting the LED lighting fixture to ceiling-mounted hook 5. Conventional ceiling-mounted hook structures often use a toggle switch on the surface of the ceiling-mounted hook to adjust the fixing part, which requires the cover to be removed during installation, and the cover must be attached after the LED lighting fixture itself has been installed, making operation overly complicated. With this design, there is no need to directly manipulate the ceiling-mounted hook 5 with bare hands during installation, and the effect of installing the LED lighting fixture can be achieved by installing the LED lighting fixture so that it passes through the pressed first mounting member 531. Furthermore, there is no need to remove the cover 14 for the LED lighting fixture, and by directly pressing the entire LED lighting fixture, a pressing action is achieved from the first surface of the base 1 to the first mounting member 531 of the mounting part 53 of the ceiling-mounted hook 5, making installation of the LED lighting fixture easier.

[0124] The embodiments of the LED lighting fixture of the present invention are as described above. In each embodiment, for the same LED lighting fixture, the following features may be implemented singly or together: "the ceiling hook includes a base member and a cover member, and the base member is connected and fixed to the cover member," "the ceiling hook further includes a mounting portion," "at least a portion of the mounting portion is housed within the base member and the cover member," "the mounting portion includes a first mounting member," "the first mounting member is partially exposed on the cover member," "the first position restricting member contacts the cover member," "the first mounting member further includes a first engaging portion, the first engaging portion is located in the opening of the first mounting member and faces the base member, and the support portion is located in the recess," "the second engaging member includes an engaging surface," "the engaging surface is a slope," "the slope angle is the same or approximately the same as the tooth slope angle of the first engaging portion," etc.

[0125] For example, the attachment portion may include a first attachment member, and the first attachment member may be partially exposed to the cover member.

[0126] For example, the slope angle is the same as or approximately the same as the tooth slope angle of the first engagement portion.

[0127] That is, any combination of the above-described features can be used to improve LED lighting fixtures.

[0128] It should be understood that the above description is illustrative and not limiting. Many embodiments and applications other than the examples provided will be apparent to those skilled in the art upon reading the above description. Accordingly, the scope of the present invention is defined by the claims, not the above description, and is intended to encompass all modifications within the meaning and scope of the claims. For all purposes, the disclosures, including all texts and references, of utility applications and publications are incorporated herein by reference. Omission of subject matter disclosed herein from the above utility claims is not intended to disclaim the subject matter, nor should it be interpreted as the inventor not considering the subject matter as part of the disclosed invention. [Explanation of symbols]

[0129] 1: base, 10: housing, 11: protrusion, 101: first storage space, 102: second storage space, 103: housing opening, 105: fourth storage space, 111: second storage space, 112: first surface, 12: mounting bottom, 13: housing side, 14: light-emitting bottom (cover), 16: mounting member, 18: mounting body, 19: first mounting portion, 20: second mounting portion, 21: transition portion, 211: inclined surface, 22: second mounting structure portion, 23: reflecting portion, 24: first part, 25: second part, 32: light source part, 321: first light source group, 322: second light source group, 34: circuit board, 36: power supply module, 5: hook ceiling, 51: base member, 511: first fixing member, 512: third fixing portion, 513: third fixing portion, 514: second arm portion, 515: recess, 516: rib portion, 517: first stopper portion, 518: second stopper portion, 519: third support member, 5181: second engagement groove portion, 52 : lid portion, 521: second fixing member, 522: mounting fitting member, 5220: first fitting member, 5221: third engaging member, 5222: second groove portion, 5223: first arm portion, 523: third groove portion, 524: first accommodating portion, 525: first supporting member, 526: second supporting member, 527: second accommodating portion 53: mounting portion, 531: first mounting member, 5311: cap member, 5312: barrel portion, 5313: first engaging portion, 532: second mounting member, 5320: second engaging member, 5321: engaging surface, 5322: first groove portion, 5323: surface portion, 5324: recess, 5325: first fixing portion, 533: third mounting member, 5331: pressing portion, 5332: limiting portion, 5333: first engaging groove portion, 5334: chamfered surface, 5335: right-angled surface, 5336: first contact portion, 534: elastic member, 5341: first elastic member, 5342: second elastic member, 54: connector, 56: stopper.

Claims

1. An LED lighting fixture, a housing including a mounting bottom and a housing side, the housing side surrounding the mounting bottom and forming a first storage space and a housing opening together with the mounting bottom, the mounting bottom having a protrusion protruding toward the housing opening, the protrusion forming a second storage space together with a plane on which the mounting bottom is located; an attachment body provided in the first accommodation space, spaced apart from the attachment bottom portion to form a third accommodation space, the attachment body including a first attachment portion and a second attachment portion; a cover provided on the housing opening; a light source unit provided on the mounting body, emitting light toward the cover, the light source unit including a first light source group provided on the first mounting portion and a second light source group provided on the second mounting portion; a power supply module provided in the third accommodation space and electrically connected to the light source unit; a ceiling hook provided in the second accommodation space, electrically connected to an external power source and the power supply module, and suitable for fixing the LED lighting fixture to a mounting surface; The first mounting portion and the mounting bottom portion have a first distance, the second mounting portion and the mounting bottom portion have a second distance, the second mounting portion is closer to the protrusion portion than the first mounting portion, and the first distance is greater than the second distance. An LED lighting fixture characterized by:

2. The LED lighting fixture according to claim 1 , wherein the mounting base has a central region, and the protrusion is located in the central region.

3. The LED lighting fixture according to claim 2 , wherein the mounting bottom is circular, and the protrusion includes a center of the circle.

4. 3. The LED lighting device according to claim 2, wherein the mounting body further includes a transition portion connecting the first mounting portion and the second mounting portion, and the transition portion is provided with a reflecting portion for reflecting light emitted from the light source portion toward a central region of the housing.

5. The LED lighting fixture according to claim 4 , wherein the light source unit includes a lamp plate, and the first and second light source groups are provided on the lamp plate and are covered within the cover.

6. 6. The LED lighting fixture according to claim 5, wherein the lamp plate is a flexible circuit sheet, and the lamp plate extends through a first mounting portion, a transition portion, and a second mounting portion.

7. 5. The LED lighting fixture according to claim 4, wherein the light source unit includes a first lamp plate installed in the first mounting portion and a second lamp plate installed in the second mounting portion, the first lamp plate and the second lamp plate having an annular shape and being installed with the protrusion portion as the center of their circles.

8. 8. The LED lighting fixture according to claim 7, wherein the first mounting portion and the second mounting portion each have a circular lamp plate, and the lamp plate in the first mounting portion and the lamp plate in the second mounting portion are arranged concentrically.

9. The LED lighting fixture described in claim 4, characterized in that the hook ceiling includes a base member, a lid member, and an attachment portion, the base member is connected and fixed to the lid member, and at least a portion of the attachment portion is accommodated in an internal space formed by the base member and the lid member, and at least a portion of the attachment portion protrudes from the lid member.

10. 10. The LED lighting device according to claim 9, wherein the mounting portion includes a first mounting member and a second mounting member, the first mounting member and the second mounting member being connected via a locking tooth structure, and the first mounting member being at least partially housed in a cover member and at least partially protruding from the cover member.

11. The LED lighting fixture according to claim 10, wherein the mounting portion may further include a third mounting member, and when the second mounting member moves toward the third mounting member and presses the third mounting member, the third mounting member moves in a direction away from an axis of the LED lighting fixture.

12. 12. The LED lighting device according to claim 11, wherein the third mounting member includes a first limiting portion, the first limiting portion being a protrusion provided on each side of the third mounting member; the base member has a first stopper portion and a second stopper portion, the first limiting portion being provided between the first stopper portion and the second stopper portion of the base member, and the first limiting portion being horizontally movable between the first stopper portion and the second stopper portion of the base member.

13. 13. The LED lighting device of claim 12, wherein a second elastic member is provided between the first stopper portion and the second stopper portion, and when the third mounting member is not subjected to an external force, the second elastic member is not subjected to the external force, and the first limiting portion receives the elastic force of the second elastic member and contacts the second stopper portion, and when the third mounting member receives a pushing force from the second mounting member, the first limiting portion moves in a direction toward the first stopper portion.

14. 14. The LED lighting device according to claim 13, wherein the first stopper portion includes a second fixing portion, the second fixing portion protruding and extending toward the second stopper portion, one end of the second elastic member is fitted onto the second fixing portion, and the other end of the second elastic member is engaged with a first engagement groove portion of the third mounting member.

15. 15. The LED lighting device according to claim 14, wherein the first mounting member includes a first position limiting member, the first position limiting member contacting the cover member, and the first position limiting member being engaged with the cover member.

16. 16. The LED lighting fixture of claim 15, wherein, when the LED lighting fixture is installed, the cover member includes a mounting fitting, the mounting fitting includes a plurality of first fitting members, the first fitting members extend toward the base member, there is a gap between two adjacent first fitting members, and the first position limiting member of the first mounting member is engaged between two adjacent first fitting members.

17. 17. The LED lighting fixture of claim 16, wherein the second mounting member includes a plurality of second engaging members, and the first fitting member has a third engaging portion at an end thereof, the third engaging portion engaging with the second engaging member, the third engaging portion having a sloped surface, the sloped surface angle being the same as the sloped surface angle of the second engaging member.

18. 18. The LED lighting fixture of claim 17, wherein, when mounting an LED lighting fixture, the first mounting member moves in a direction toward the mounting surface, generates a pushing force on the second mounting member, the second mounting member receives the force and moves toward the mounting surface, the second engaging member that was originally in the third engaging portion is pushed out, and after the pushing force is removed, the second mounting member moves in a direction away from the mounting surface, and the second engaging member is engaged between the two mounting fitting members, at which point the second mounting member does not exert a pushing force on the third mounting member, and the third mounting member moves in a direction toward the axis of the LED lighting fixture.

19. 19. The LED lighting fixture of claim 18, wherein, when the LED lighting fixture is mounted, a first surface of the protrusion of the base is pressed against the first mounting member, causing the first mounting member to move in a direction toward the mounting surface, the first mounting member generating a pushing force on the second mounting member, the second mounting member receiving the force and moving toward the mounting surface, the second engaging member originally located between the two mounting fitting members being pushed out, and after the external force is removed, the second mounting member moving in a direction away from the mounting surface, the second engaging member engaging with the third engaging portion, at which point the second mounting member generates a pushing force on the third mounting member, causing the third mounting member to move in a direction away from the LED axis.

Images