CN218514555U

CN218514555U - Brightness adjusting device and lamp

Info

Publication number: CN218514555U
Application number: CN202222399389.4U
Authority: CN
Inventors: 伍传基
Original assignee: Shenzhen Yingzhiqi Technology Co ltd
Current assignee: Shenzhen Yingzhiqi Technology Co ltd
Priority date: 2022-09-08
Filing date: 2022-09-08
Publication date: 2023-02-21
Anticipated expiration: 2032-09-08
Also published as: WO2024051744A1

Abstract

The application discloses brightness adjusting device and lamp relates to lighting equipment technical field. The brightness adjusting device comprises a base, a rotating ring and a circuit board; an accommodating cavity is formed in the base, a magnetic induction assembly is arranged in the base, and the magnetic induction assembly comprises at least two magnetic inductors which are arranged in a staggered mode in the radial direction of the accommodating cavity; the rotating ring is sleeved on the outer peripheral surface of the base and is in running fit with the base, a preset number of first magnet pieces are distributed on the inner wall surface of the rotating ring along the circumferential direction, and the first magnet pieces are used for being in induction fit with the magnetic inductor; the circuit board is arranged in the accommodating cavity, a control unit electrically connected with the magnetic inductor is integrated on the circuit board, and the control unit is configured to acquire the change information of the magnetic flux in the magnetic inductor and adjust the brightness of the lamp according to the change information of the magnetic flux. The utility model discloses a brightness control device realizes the nimble control of accent of lamps and lanterns luminance and dim, and easy operation promotes user experience.

Description

Brightness adjusting device and lamp

Technical Field

The application relates to the technical field of lighting equipment, in particular to a brightness adjusting device and a lamp.

Background

The lamp is a common tool in people's daily life, and is usually used in scenes such as study, work, make-up or shooting. However, different usage scenarios have different brightness requirements for the lighting. In the prior art, brightness adjustment of a lamp is usually performed by switching different brightness gears set when the lamp leaves a factory through a key switch or a touch switch, so as to control the brightness of the lamp. However, the control mode is easy to be touched by mistake in the use process of the lamp, and particularly, the touch switch can only be used for shifting up. From this, bump the fender position of having skipped suitable luminance when the user mistake, then need to shift up to the highest gear and just can return to minimum gear, then shift up step by step from minimum gear again, complex operation, user use experience is poor.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a brightness adjusting device and a lamp, which are used for solving the defects in the prior art.

To achieve the above object, in a first aspect, the present application provides a brightness adjusting device applied to a lamp, the brightness adjusting device including:

the magnetic induction device comprises a base, a magnetic induction component and a magnetic sensor, wherein an accommodating cavity is formed in the base, the magnetic induction component is arranged in the base and comprises at least two magnetic inductors which are arranged in a staggered mode along the radial direction of the accommodating cavity;

the rotating ring is sleeved on the outer peripheral surface of the base and is in running fit with the base, a preset number of first magnet pieces are distributed on the inner wall surface of the rotating ring along the circumferential direction, and the first magnet pieces are used for being in induction fit with the magnetic inductor; and

the circuit board is arranged on the base and located in the accommodating cavity, a control unit electrically connected with the magnetic inductors is integrated on the circuit board, and the control unit is configured to acquire change information of magnetic fluxes in at least two magnetic inductors and adjust the brightness of the lamp according to the change information of the magnetic fluxes.

As a further improvement of the technical scheme:

with reference to the first aspect, in one possible implementation manner, the magnetic inductor is a hall sensor.

With reference to the first aspect, in one possible embodiment, a predetermined number of the first magnet pieces are evenly distributed in the circumferential direction on the inner wall surface of the rotating ring.

With reference to the first aspect, in one possible embodiment, the first magnet member is bonded to or fitted on an inner wall surface of the rotating ring.

With reference to the first aspect, in one possible embodiment, a plurality of second magnet pieces for magnetically cooperating with the first magnet piece are uniformly arranged on the inner wall surface of the base in the circumferential direction, and the polarities of the second magnet pieces on the opposite sides to the first magnet piece are opposite.

With reference to the first aspect, in one possible implementation manner, an inner wall surface of the rotating ring is provided with a first limit shoulder, an outer peripheral surface of the base is provided with a second limit shoulder, and the first limit shoulder is abutted against the second limit shoulder so as to limit the rotating ring from moving in the axial direction of the base.

With reference to the first aspect, in one possible embodiment, the outer circumferential surface of the rotating ring is provided with anti-slip threads.

With reference to the first aspect, in one possible embodiment, the outer circumferential surface of the rotating ring is provided with an anti-slip rubber mat.

With reference to the first aspect, in a possible implementation manner, a power interface and a display screen are provided on the base.

In order to achieve the above object, in a second aspect, the present application further provides a lamp, including a light emitting device and the brightness adjusting device provided according to the above first aspect, where the brightness adjusting device is configured to adjust the brightness of the light emitted by the light emitting device.

Compare in prior art, the beneficial effect of this application:

the application provides a brightness control device and lamps and lanterns, wherein, brightness control device includes base, rotatory ring and circuit board, is equipped with the magnetic inductor subassembly in the base, and the magnetic inductor subassembly includes two at least magnetic inductors of radially staggering the arranging along holding the chamber, and rotatory ring cover is located the outer peripheral face of base, and with base normal running fit, the internal face of rotatory ring distributes along circumference has the first magnet piece of predetermineeing quantity, first magnet piece be used for with the magnetic inductor response cooperation. Therefore, the brightness adjusting device disclosed by the application can change the magnetic flux passing through each magnetic inductor by rotating the rotating ring, and at least two magnetic inductors are arranged along the radial direction of the accommodating cavity in a staggered manner, so that the magnetic flux passing through each magnetic inductor is different when the rotating ring is rotated in the forward and reverse directions, and the control unit is configured to acquire the change information of the magnetic flux in at least two magnetic inductors and adjust the brightness of the lamp according to the change information of the magnetic flux. From this, through with the control unit with rotatory just reversing of circle and the accent and the dim of lamps and lanterns carry out relevance, realize the nimble control of the accent of lamps and lanterns luminance and dim, easy operation has greatly promoted user experience.

Additional features and advantages of the present application will be described in detail in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate certain embodiments of the application and together with the description serve to explain the application, it will be understood that the following drawings illustrate only some embodiments of the application and are therefore not to be considered limiting of scope, for those skilled in the art to which the invention pertains and that other related drawings may be devised without departing from the inventive concepts herein. In the drawings:

fig. 1 is a schematic perspective view illustrating a lamp provided with a lampshade according to an embodiment of the present application;

fig. 2 is an exploded schematic view of a lamp provided in an embodiment of the present application;

FIG. 3 is an exploded view of the heat sink of the lamp of FIG. 2;

FIG. 4 shows a front view of the light fixture of FIG. 1 with the lamp enclosure hidden;

FIG. 5 showsbase:Sub>A cross-sectional view along A-A of FIG. 4;

FIG. 6 shows an enlarged partial schematic view at B in FIG. 5;

FIG. 7 is an exploded view of the dimming device of the lamp of FIG. 2;

fig. 8 is a schematic diagram illustrating a structure of a brightness adjusting device according to an embodiment of the present disclosure.

Description of reference numerals:

100. a light emitting device; 110. a lamp socket; 120. a light emitting assembly; 130. a lamp shade; 200. a heat sink; 210. a heat sink; 211. an air inlet; 212. an air outlet; 220. a heat-dissipating medium; 230. a first connecting seat; 240. a fan assembly; 300. a power supply device; 310. installing a shell; 311. a battery compartment; 320. a power supply battery; 330. a second connecting seat; 400. a brightness adjusting device; 410. a base; 411. an accommodating chamber; 412. a base body; 4120. a second limit shoulder; 4121. a second accommodating groove; 413. mounting a plate; 414. a fixing ring; 420. a rotating ring; 421. a first limit shoulder; 422. anti-skid lines; 430. a circuit board; 440. a magnetic inductor; 450. a first magnet piece; 460. a second magnet piece; 470. a power interface; 480. and a display screen.

Detailed Description

The following detailed description of embodiments of the present application will be made with reference to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the embodiments of the application, are given by way of illustration and explanation only, not limitation.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict.

In the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

The present application will now be described in detail with reference to the accompanying drawings in conjunction with exemplary embodiments.

Referring to fig. 1 and 2, the present embodiment provides a lamp. The lamp comprises a light emitting device 100, a heat dissipation device 200, a power supply device 300 and a brightness adjusting device 400, wherein the light emitting device 100, the heat dissipation device 200, the power supply device 300 and the brightness adjusting device 400 are sequentially arranged in a linear direction and are detachably connected with each other.

The light emitting device 100 is used to emit light; in the present embodiment, the side of the light emitting device 100 emitting the light is a light emitting side, and the side facing away from the light emitting side is a backlight side. The heat sink 200 is detachably disposed on the backlight side of the light emitting device 100 for dissipating heat of the light emitting device 100. The power supply device 300 is detachably connected to the heat sink 200 for supplying power. The brightness adjustment device 400 is detachably connected to the power supply device 300, and is used for controlling the brightness of the light emitting device 100.

Specifically, the light emitting device 100 includes a lamp socket 110 and a light emitting element 120, the light emitting element 120 is disposed in the lamp socket 110, the light emitting element 120 is used for emitting light, and the light emitting element 120 is electrically connected to the power supply device 300 and the brightness adjusting device 400.

Further, a lamp cover 130 is further disposed on the lamp socket 110, wherein the lamp cover 130 is detachably connected to the lamp socket 110 and is located on the light emitting side of the light emitting device 100.

Optionally, the lamp cover 130 is snap-fit, screw-fit, interference fit, or screw-fit with the lamp socket 110.

Referring to fig. 2 and 3, the heat dissipating device 200 includes a heat dissipating base 210, a heat dissipating medium 220, a first connecting base 230 and a fan assembly 240. The heat sink 210 is a hollow structure, and an external thread is disposed at one end of the outer peripheral surface of the heat sink 210, which is connected to the lamp socket 110. The heat sink 210 is provided with an air inlet 211 and an air outlet 212, and the air inlet 211 and the air outlet 212 can allow air to enter and exit the heat sink 210, so as to dissipate heat.

The heat dissipation medium 220, the fan assembly 240, and the first connection seat 230 are sequentially arranged in an axial direction of the heat dissipation seat 210. The heat dissipation medium 220 is disposed in the heat dissipation base 210 and abuts against the light emitting element 120 of the light emitting device 100, so that the heat dissipation medium 220 exchanges heat with the light emitting device 100 and fixes the light emitting element 120. The first connecting seat 230 is disposed on a side of the heat sink 210 away from the heat dissipating medium 220, and the first connecting seat 230 is used for detachably connecting the power device 300. The fan assembly 240 is disposed on the first connection seat 230 and located between the heat dissipation medium 220 and the first connection seat 230, and the fan assembly 240 is configured to form an airflow flowing from the air inlet 211 to the air outlet 212 in the heat dissipation seat 210 to take away heat on the heat dissipation medium 220, so as to achieve a heat dissipation purpose.

Referring to fig. 2, 4 and 5, the power supply device 300 includes a mounting housing 310, a power supply battery 320 and a second connecting seat 330. The mounting housing 310 is a long cylinder structure, one end of the mounting housing 310 is detachably connected to the heat dissipation device 200, specifically, the mounting housing 310 is sleeved on the first connection seat 230 and detachably connected to the first connection seat 230. The detachable connection mode comprises clamping connection or threaded connection.

Further, a battery compartment 311 is provided in the mounting case 310. The power supply battery 320 is disposed in the battery compartment 311 of the mounting housing 310, and the power supply battery 320 can provide power for the light-emitting device 100, the heat dissipation device 200, and the brightness adjustment device 400.

The second connecting seat 330 is disposed at an end of the mounting housing 310 away from the heat sink 200, and the second connecting seat 330 is connected to the mounting housing 310 by screws. The second connecting seat 330 is also used for detachably connecting with the brightness adjusting device 400.

Referring to fig. 2, 5, 6, 7 and 8, the brightness adjusting apparatus 400 includes a base 410, a rotating ring 420 and a circuit board 430. The base 410 is detachably connected to the second connecting base 330, for example, by being snapped or screwed. The base 410 is provided with an accommodating cavity 411 inside, and a magnetic induction assembly is arranged in the base 410 and comprises at least two magnetic inductors 440. In the present embodiment, the magnetic induction assembly includes two magnetic inductors 440, and the two magnetic inductors 440 are disposed along the radial direction of the accommodating cavity 411 in a staggered manner, that is, the two magnetic inductors 440 are not on the same straight line passing through the radial direction (see fig. 8). In the present embodiment, the two magnetic inductors 440 are respectively close to the inner wall surface of the base 410.

The rotating ring 420 is sleeved on the outer peripheral surface of the base 410, and the rotating ring 420 is rotatably engaged with the base 410, so that the rotating ring 420 can freely rotate around the base 410. A predetermined number of first magnet pieces 450 are circumferentially distributed on an inner wall surface of the rotating ring 420, and the first magnet pieces 450 are adapted to be in induction fit with the magnetic inductor 440.

The circuit board 430 is disposed on the base 410 and located in the accommodating cavity 411, a control unit (not shown) is integrated on the circuit board 430, the control unit is electrically connected to the two magnetic inductors 440 respectively, and the control unit is configured to obtain variation information of magnetic fluxes in the two magnetic inductors 440 and adjust brightness of the lamp according to the variation information of the magnetic fluxes.

Further, in the present embodiment, both the magnetic inductors 440 are hall sensors.

Alternatively, a predetermined number of the first magnet pieces 450 are evenly distributed in the circumferential direction on the inner wall surface of the rotating ring 420.

In some embodiments, the first magnet piece 450 is bonded to the inner wall surface of the rotating ring 420, specifically, glue is applied to the side of the first magnet piece 450 that is bonded to the rotating ring 420, and then the first magnet piece 450 is bonded to the inner wall surface of the rotating ring 420.

In other embodiments, the first magnet piece 450 is embedded on the inner wall surface of the rotating ring 420, specifically, a first receiving groove (not shown) is formed on the inner wall surface of the rotating ring 420, the first magnet piece 450 is clamped into the corresponding first receiving groove, and the first magnet piece 450 and the first receiving groove are in interference fit, so as to prevent the first magnet piece 450 from falling off from the first receiving groove, and the installation is more stable.

It can be understood that, since the two magnetic inductors 440 are disposed in a staggered manner along the radial direction of the accommodating cavity 411, that is, the two magnetic inductors 440 are disposed asymmetrically, when the rotating ring 420 is rotated, the control unit generates corresponding control signals according to the variation of the magnetic fluxes in the two magnetic inductors 440 to adjust the brightness of the light emitted from the light emitting assembly 120, so as to achieve the purpose of brightness adjustment, due to the different magnetic fluxes in the two magnetic inductors 440. Further, in the present embodiment, the rotation direction (normal and reverse rotation) of the rotating ring 420 is associated with the dimming and dimming in the brightness adjustment manner. And defines that clockwise rotation of the rotating ring 420 is forward rotation and counterclockwise rotation is reverse rotation. Taking the viewing angle shown in fig. 8 as an example, in order to more clearly describe the technical solution of the present embodiment, the following examples are given:

when the rotating ring 420 is rotated clockwise, the magnetic flux detected by the magnetic inductor 440 positioned above meets the preset value condition, and meanwhile, the magnetic flux detected by the magnetic inductor 440 positioned below is smaller than the preset value or is 0, the rotating ring 420 is defined to be turned on in a positive rotation mode; when the rotating ring 420 is rotated counterclockwise, the magnetic flux detected by the upper magnetic sensor 440 satisfies the predetermined condition, and the magnetic flux detected by the lower magnetic sensor 440 also satisfies the predetermined condition, the rotating ring 420 is defined to be reversed to be dimmed. It should be noted that the condition for satisfying the clockwise or counterclockwise rotation is not unique, and the manner of the brightness adjustment corresponding to the rotation direction of the rotating ring 420 is not unique, and the above conditions can be set according to actual situations or requirements. Therefore, it should be understood that the above description is intended to be illustrative only and should not be taken as limiting the scope of the present application.

It is also understood that the accuracy of the luminance adjustment is solved by the number of the first magnet pieces 450, and the more the number of the first magnet pieces 450 is, the higher the adjustment accuracy is. Thus, the number of the first magnet pieces 450 is not limited in the present embodiment.

Further, in the present embodiment, the base 410 includes a base body 412, a mounting plate 413 and a fixing ring 414, the base body 412 is a cylindrical shape, the accommodating cavity 411 is disposed to penetrate along an axial direction of the base, and the base body 412 is detachably connected to the second connecting seat 330 in the power device 300. The mounting plate 413 is disposed at an end of the base 412 away from the second connecting seat 330, and the mounting plate 413 is received in the receiving cavity 411 and blocks an opening end of the receiving cavity 411 away from the second connecting seat 330. The fixing ring 414 is detachably disposed at an end of the base 412 away from the second connecting seat 330, and the fixing ring 414 abuts against a side of the mounting plate 413 opposite to the second connecting seat 330, so as to fix the mounting plate 413 on the base 412 and prevent the mounting plate 413 from being removed.

Referring to fig. 8, in some embodiments, two magnetic sensors 440 are fixedly mounted on the mounting plate 413 and extend along a direction of the mounting plate 413 close to the circuit board 430. An included angle formed by a vertical connection line from each of the two magnetic inductors 440 to the axis O of the base 410 is C, wherein the included angle C is smaller than 180 °.

Referring to fig. 7, the inner wall of the rotating ring 420 is provided with a first limit shoulder 421, the first limit shoulder 421 is annular, the outer circumferential surface of the base 410 is provided with a second limit shoulder 4120, and the first limit shoulder 421 abuts against the second limit shoulder 4120 to limit the axial movement of the rotating ring 420 along the base 410.

Specifically, a stepped shaft structure is machined on the outer peripheral surface of the seat body 412, and a second limit shoulder 4120 is formed at an abrupt change of the outer diameter of the stepped shaft structure. Similarly, a stepped hole structure is axially machined on the inner wall of the rotating ring 420, and a first limit shoulder 421 is formed at the abrupt change of the inner diameter of the stepped hole structure.

Thus, when the rotating ring 420 is mounted, the end of the base body 412 having a smaller outer diameter is fitted in until the first stopper shoulder 421 abuts against the second stopper shoulder 4120, and the rotating ring 420 is mounted in place.

Referring to fig. 7 and 8, further, a plurality of second magnet pieces 460 are uniformly arranged on the inner wall surface of the base 412 along the circumferential direction, the second magnet pieces 460 are used for magnetically matching with the first magnet piece 450, and the polarities of the opposite sides of the second magnet pieces 460 and the first magnet piece 450 are opposite, for example, the opposite sides of the first magnet piece 450 and the second magnet piece 460 are respectively an N pole and an S pole. The two magnetic inductors 440 are respectively located between two adjacent second magnet pieces 460, so as to prevent the magnetic inductors 440 from being interfered by the second magnet pieces 460 after installation.

It can be understood that when the rotating ring 420 is rotated to the predetermined position, the rotating ring 420 is released, and the first magnet piece 450 of the rotating ring 420 and the second magnet piece 460 of the housing 412 in the free state are attracted to each other by the opposite attraction of the magnets, so that the rotating ring 420 is automatically aligned and maintained at its original position. The magnetic force between the first and

second magnet pieces

450 and 460 can provide a certain rotational resistance to the rotating ring 420, so as to prevent the rotating ring 420 from being rotated by non-human factors, and improve the user experience.

In some embodiments, the second magnet piece 460 is bonded to the inner wall surface of the base 412, specifically, glue is applied to the surface of the second magnet piece 460 bonded to the base 412, and then the second magnet piece 460 is bonded to the inner wall surface of the base 412.

In other embodiments, the second magnet piece 460 is embedded on the inner wall surface of the base 412, specifically, the second receiving groove 4121 is formed on the inner wall surface of the base 412, the second magnet piece 460 is clamped into the corresponding second receiving groove 4121, and the second magnet piece 460 and the second receiving groove 4121 are in interference fit, so as to prevent the second magnet piece 460 from falling off from the second receiving groove 4121, and the installation is more stable.

In some embodiments, the inner wall surface of the rotating ring 420 is uniformly provided with click teeth (not shown) along the circumferential direction, the elastic piece (not shown) is mounted on the outer circumferential surface of the seat body 412, the elastic piece abuts against the tooth tops of the click teeth, when the rotating ring 420 is rotated, the elastic piece vibrates to give out a click sound through the contact between the elastic piece and the click teeth, and meanwhile, the contact between the elastic piece and the tooth tops of the click teeth brings certain resistance to the rotation of the rotating ring 420, so that the rotating ring 420 is prevented from continuing to rotate due to non-human factors, and the use experience of a user is improved.

In some embodiments, the outer circumferential surface of the rotating ring 420 is provided with anti-slip threads 422 to facilitate rotation of the rotating ring 420. Optionally, the anti-slip pattern 422 is a bar-like ridge extending along the axis of the rotating ring 420; or the antiskid thread 422 is an annular rib formed around the axial direction of the rotating ring 420; or alternatively, criss-crossed ribs.

In other embodiments, the non-slip threads 422 may be replaced with a non-slip rubber pad.

In some embodiments, the mounting plate 413 of the base 410 is provided with a power interface 470 and a display screen 480. The power interface 470 may be used to charge the power supply battery 320 in the power supply apparatus 300, and may also be used to supply power to an external device. The display screen 480 may display the brightness adjustment level and may also display the power condition of the power supply battery 320.

Further, the present embodiment also provides a brightness adjustment apparatus 400, wherein the brightness adjustment apparatus 400 is described in detail above and is not described herein again.

The brightness adjusting device 400 provided by this embodiment can change the magnetic fluxes passing through the two magnetic inductors 440 by rotating the rotating ring 420, and because the two magnetic inductors 440 are arranged along the radial direction of the accommodating cavity 411 in a staggered manner, when the rotating ring 420 is rotated in the forward and reverse directions, the magnetic fluxes passing through the two magnetic inductors 440 are different, so that the forward and reverse rotation of the rotating ring 420 is associated with the brightness adjustment and dimming of the lamp by the control unit, thereby realizing the flexible control of the brightness adjustment and dimming of the lamp, having simple operation, and greatly improving the user experience.

In addition, the number of the first magnet pieces 450 in the rotating ring 420 can be increased, so that high-precision brightness adjustment can be realized, requirements of different users on different brightness can be met, and user experience can be further improved.

Alternative embodiments of the present application are described in detail above with reference to the drawings, however, the embodiments of the present application are not limited to the specific details in the embodiments, and within the technical idea of the embodiments of the present application, many simple modifications may be made to the technical solution of the embodiments of the present application, and these simple modifications all belong to the protection scope of the embodiments of the present application.

It should be noted that, in the foregoing embodiments, various features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not separately described in the embodiments of the present application.

In addition, any combination of various different implementation manners of the embodiments of the present application can be performed, and the embodiments of the present application should be considered as disclosed in the embodiments of the present application as long as the combinations do not depart from the spirit of the embodiments of the present application.

Claims

1. A brightness adjusting device is applied to a lamp, and the brightness adjusting device (400) comprises:

the magnetic induction type magnetic induction device comprises a base (410), wherein an accommodating cavity (411) is formed in the base (410), a magnetic induction assembly is arranged in the base (410), and the magnetic induction assembly comprises at least two magnetic inductors (440) which are arranged in a staggered mode along the radial direction of the accommodating cavity (411);

the rotating ring (420) is sleeved on the outer peripheral surface of the base (410) and is in running fit with the base (410), a preset number of first magnet pieces (450) are distributed on the inner wall surface of the rotating ring (420) along the circumferential direction, and the first magnet pieces (450) are used for being in induction fit with the magnetic inductor (440); and

the circuit board (430) is arranged on the base (410) and located in the accommodating cavity (411), a control unit electrically connected with the magnetic inductors (440) is integrated on the circuit board (430), and the control unit is configured to acquire variation information of magnetic fluxes in at least two of the magnetic inductors (440) and adjust the brightness of the lamp according to the variation information of the magnetic fluxes.

2. Brightness adjustment device according to claim 1, characterized in that the magnetic sensor (440) is a hall sensor.

3. A luminance adjustment device as defined in claim 1, wherein a predetermined number of the first magnet pieces (450) are uniformly distributed in a circumferential direction on an inner wall surface of the rotating ring (420).

4. A luminance adjusting apparatus as set forth in claim 1, wherein the first magnet member (450) is bonded or fitted on an inner wall surface of the rotating ring (420).

5. A luminance adjusting apparatus as claimed in claim 1, wherein a plurality of second magnet pieces (460) are uniformly arranged on an inner wall surface of the base (410) in a circumferential direction, the second magnet pieces (460) are for magnetic force engagement with the first magnet piece (450), and polarities of opposite sides of the second magnet pieces (460) to the first magnet piece (450) are opposite.

6. The luminance adjusting apparatus as claimed in claim 1, wherein an inner wall surface of the rotating ring (420) is provided with a first limit shoulder (421), an outer peripheral surface of the base (410) is provided with a second limit shoulder (4120), and the rotating ring (420) is restricted from moving in the axial direction of the base (410) by the first limit shoulder (421) abutting against the second limit shoulder (4120).

7. A brightness adjustment device according to claim 1, characterized in that the outer peripheral surface of said rotating ring (420) is provided with an anti-slip thread (422).

8. A brightness adjustment device according to claim 1, characterized in that the outer peripheral surface of said rotating ring (420) is provided with an anti-slip rubber mat.

9. A brightness adjusting device according to claim 1, characterized in that said base (410) is provided with a power interface (470) and a display screen (480).

10. A luminaire comprising a light-emitting device (100) and a brightness adjustment device (400) according to any one of claims 1-9, wherein the brightness adjustment device (400) is configured to adjust the brightness of the emitted light of the light-emitting device (100).