CN212390227U - Cylinder lamp - Google Patents

Abstract

The application belongs to the technical field of lighting device, especially, relate to a down lamp. In the down lamp, the heat dissipation member comprises a cylindrical shell and an annular wall. The annular wall is arranged on the installation cylinder, the cylindrical shell extends into the installation cylinder, the light source piece is arranged on the outer wall of the closed end of the cylindrical shell, and the telescopic cylinder is slidably arranged on the installation cylinder along the axial direction of the installation cylinder. The distance between the light outlet of the telescopic cylinder and the light source part is changed by adjusting the position of the telescopic cylinder relative to the mounting cylinder, so that the adjustment of the light emitting angle is realized. The heat generated by the light source component is transferred to the external environment through the heat dissipation component, so that the influence on the driving component is reduced, and the reliability of the driving component is improved. The down lamp is simple in structure, easy to manufacture and capable of conveniently adjusting the light emitting angle.

Description

Cylinder lamp

Technical Field

The application belongs to the technical field of lighting device, especially, relate to a down lamp.

Background

The down lamp is a lighting lamp which is embedded in a ceiling and emits light downwards. The installation of down lamp is used and is had the advantage that keeps the whole unity of architectural decoration, can not destroy the unity that the furred ceiling was arranged because of the setting of lamps and lanterns. However, the down lamp in the prior art has only a single light-emitting angle, that is, the irradiation range of the light-emitting beam of the down lamp is fixed.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the application is to provide a down lamp to solve the single technical problem of luminous angle of current down lamp.

The embodiment of the application provides a down lamp which comprises a face ring, an installation cylinder, a telescopic cylinder, a heat dissipation piece, a light source piece and a driving assembly; the mounting cylinder is mounted on the face ring; one end of the telescopic cylinder is provided with a light outlet; the telescopic cylinder is mounted on the mounting cylinder in a sliding manner along the axial direction of the mounting cylinder; the heat dissipation piece comprises a cylindrical shell and an annular wall, one end of the cylindrical shell is a closed end, and the annular wall is connected to the edge of the other end of the cylindrical shell; the annular wall is connected to one end of the mounting cylinder, and the cylindrical shell extends into the mounting cylinder; the light source part is arranged on the outer wall of the closed end of the cylindrical shell, and the light emitting surface of the light source part faces the light outlet; the driving component is electrically connected with the light source component.

Optionally, the down lamp further comprises a lens, and the lens is arranged at the light outlet.

Optionally, a light reflecting cup is arranged in the telescopic cylinder, the light reflecting cup is provided with a narrow opening end and a flared end which are opposite to each other, the flared end is arranged close to the light outlet, a part of the lens is accommodated in the flared end, the light source part is arranged close to the narrow opening end of the light reflecting cup, and the cylindrical shell can extend into the narrow opening end.

Optionally, one part of the annular wall is in a shape of a circular truncated cone, and in a direction from the light source to the light outlet, the outer diameter of the circular truncated cone-shaped part of the annular wall is gradually increased.

Optionally, the cylindrical shell is in a circular truncated cone shape, and an outer diameter of the cylindrical shell gradually decreases in a direction from the light source to the light outlet.

Optionally, the light source element is fixed on the closed end of the cylindrical shell through a fixing element; the closed end of the cylindrical shell is provided with a clamping hole, the fixing piece comprises a pressing plate and a buckle arranged on the pressing plate, and the buckle is buckled in the clamping hole so that the light source piece is clamped between the pressing plate and the outer wall of the closed end of the cylindrical shell.

Optionally, the pressing plate has a through opening for passing the light of the light source unit.

Optionally, the drive assembly is at least partially disposed within the cylindrical shell.

Optionally, the oral area lid of tube-shape shell is equipped with the lid, drive assembly includes drive control panel and locates drive control panel's interface, the lid has and is used for dodging the hole of dodging of interface.

Optionally, the mounting cylinder is in threaded connection with the telescopic cylinder, and the telescopic cylinder moves relative to the mounting cylinder along the axial direction of the mounting cylinder when the telescopic cylinder rotates relative to the mounting cylinder;

or the mounting cylinder is sleeved outside the telescopic cylinder, and a damping part is arranged between the mounting cylinder and the telescopic cylinder;

or the installation cylinder is sleeved outside the telescopic cylinder, the inner wall of the installation cylinder is provided with a straight rib, the outer wall of the telescopic cylinder is provided with a straight groove, and the straight rib is matched with the straight groove;

or, the installation barrel sleeve is arranged outside the telescopic barrel, the inner wall of the installation barrel is provided with a straight groove, the outer wall of the telescopic barrel is provided with a straight rib, and the straight rib is matched with the straight groove.

One or more technical solutions in the down lamp provided by the embodiment of the application have at least one of the following technical effects: in the down lamp, the heat dissipation member comprises a cylindrical shell and an annular wall. The annular wall is arranged on the installation cylinder, the cylindrical shell extends into the installation cylinder, the light source piece is arranged on the outer wall of the closed end of the cylindrical shell, and the telescopic cylinder is slidably arranged on the installation cylinder along the axial direction of the installation cylinder. The distance between the light outlet of the telescopic cylinder and the light source part is changed by adjusting the position of the telescopic cylinder relative to the mounting cylinder, so that the adjustment of the light emitting angle is realized. The heat generated by the light source component is transferred to the external environment through the heat dissipation component, so that the influence on the driving component is reduced, and the reliability of the driving component is improved. The down lamp is simple in structure, easy to manufacture and capable of conveniently adjusting the light emitting angle.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.

Fig. 1 is a perspective assembly view of a downlight provided by an embodiment of the present application;

FIG. 2 is another perspective assembly view of the downlight of FIG. 1;

FIG. 3 is an exploded perspective view of the downlight of FIG. 2;

FIG. 4 is a further exploded perspective view of the downlight of FIG. 3;

FIG. 5 is an exploded perspective view of the mounting barrel and the telescoping barrel of the downlight of FIG. 3;

FIG. 6 is a sectional view taken along line A-A of FIG. 2;

FIG. 7 is an exploded perspective view of the cover, drive assembly, heat sink, light source and fixture of the downlight of FIG. 3;

fig. 8 is an exploded perspective view of an installation barrel and a telescopic barrel in a downlight according to another embodiment of the present application;

fig. 9 is an exploded perspective view of an installation tube and a telescopic tube in a downlight according to another embodiment of the present application.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

In the description of the embodiments of the present application, it is to be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to orientations and positional relationships illustrated in the drawings, which are used for convenience in describing the embodiments of the present application and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the embodiments of 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 the embodiments of the present application, unless otherwise specifically stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly, e.g., as meaning fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the embodiments of the present application can be understood by those of ordinary skill in the art according to specific situations.

Referring to fig. 1, 3 and 5, an embodiment of the present application provides a down lamp, which includes a surface ring 10, an installation cylinder 20, a telescopic cylinder 30, a heat sink 40, a light source unit 1 and a driving assembly. The mounting cylinder 20 is mounted to the face ring 10. One end of the telescopic tube 30 has a light outlet 31. The telescopic cylinder 30 is slidably mounted to the mounting cylinder 20 in the axial direction of the mounting cylinder 20. Referring to fig. 7, the heat sink 40 includes a cylindrical case 41 and an annular wall 42, one end of the cylindrical case 41 is a closed end 41a, and the annular wall 42 is connected to the other end edge of the cylindrical case 41. Referring to fig. 6, an annular wall 42 is attached to one end of the mounting cylinder 20, and a cylindrical shell 41 extends into the mounting cylinder 20. The light source element 1 is provided on the outer wall of the closed end 41a of the cylindrical case 41, and the light emitting surface of the light source element 1 is provided toward the light outlet 31. The driving element 80 is electrically connected to the light source device 1.

Compared with the related art, the down lamp provided by the application has the advantages that the heat dissipation member 40 comprises the cylindrical shell 41 and the annular wall 42. The annular wall 42 is provided on the mounting tube 20, the cylindrical shell 41 extends into the mounting tube 20, the light source element 1 is provided on the outer wall of the closed end 41a of the cylindrical shell 41, and the telescopic tube 30 is slidably mounted on the mounting tube 20 along the axial direction of the mounting tube 20. By adjusting the position of the telescopic cylinder 30 relative to the mounting cylinder 20, the distance between the light outlet 31 of the telescopic cylinder 30 and the light source 1 is changed, thereby realizing the adjustment of the light emitting angle. The heat generated by the light emitting of the light source element 1 is transferred to the external environment through the heat sink 40, so that the influence on the driving assembly 80 is reduced, and the reliability of the driving assembly 80 is improved. The down lamp is simple in structure, easy to manufacture and capable of conveniently adjusting the light emitting angle.

Illustratively, the light source 1 is a COB light source, which is a high light efficiency integrated surface light source with an LED chip directly attached to a mirror metal substrate with high light reflection rate. Of course, other light sources may be used as desired.

As shown in FIG. 1, two torsion springs 4 are respectively arranged at two sides of the face ring 10 for clamping and fixing the down lamp.

Referring to fig. 5 and 6, in another embodiment of the present application, the tube light further includes a lens 2, and the lens 2 is disposed at the light outlet 31. This facilitates the light beam emitted from the light source unit 1 to be concentrated at the lens 2, and then to be emitted to the outside after being condensed by the lens 2. The lens 2 is mostly accommodated in the telescopic cylinder 30, so that the outer surface of the lens 2 is approximately flush with the end surface of the telescopic cylinder 30, which is more beautiful. Illustratively, the lens 2 has a cylindrical limiting portion, the end surface of the telescopic tube 30 is provided with a limiting groove, the limiting portion is adapted to the limiting groove, and when the limiting portion is clamped into the limiting groove, the lens 2 is limited at the light outlet 31 and cannot fall out of the light outlet 31.

Referring to fig. 6, in another embodiment of the present application, a reflective cup 3 is disposed in the telescopic tube 30, the reflective cup 3 has a narrow opening end 3a and a flared end 3b opposite to each other, the flared end 3b is disposed near the light outlet 31, a portion of the lens 2 is accommodated in the flared end 3b, and the light source 1 is disposed near the narrow opening end 3a of the reflective cup 3. The reflecting cup 3 is arranged, so that the light beam emitted by the light source component 1 can be shot to the lens 2 as far as possible, and the lighting effect is improved. Illustratively, the reflector cup 3 is fixed on the end surface of the telescopic cylinder 30 by a fastener, and the edge of the flared end 3b of the reflector cup 3 blocks the limit part of the lens 2, so that the lens 2 can be fixed on the telescopic cylinder 30. The heat sink 40 is provided with a cylindrical shell 41, and the light source device 1 is arranged on the outer wall of the closed end 41a of the cylindrical shell 41, so that the cylindrical shell 41 can extend into the narrow opening end 3a, and thus the light source device 1 can be closer to the plane of the face ring 10 and is matched with the lens 2 to obtain better light efficiency.

Referring to fig. 6, in another embodiment of the present application, a portion of the annular wall 42 is in a circular truncated cone shape, and an outer diameter of the circular truncated cone-shaped portion of the annular wall 42 is gradually increased in a direction from the light source 1 to the light outlet 31. In the case where the diameter of the mounting tube 20 is not constant, a part of the annular wall 42 is formed in a circular truncated cone shape, so that the area of the annular wall 42 can be increased, the heat of the light source device 1 can be more quickly transferred from the annular wall 42 to the surrounding environment, and the heat dissipation effect can be improved. The annular wall 42 is formed in a circular truncated cone shape, so that the shape is easy to mold, and the strength of the portion can be improved to some extent.

Referring to fig. 6 and 7, in another embodiment of the present application, the cylindrical shell 41 is in a circular truncated cone shape, and the outer diameter of the cylindrical shell 41 gradually decreases in the direction from the light source 1 to the light outlet 31. The cylindrical case 41 is formed in a circular truncated cone shape, and thus the shape is easily formed. When the telescopic cylinder 30 is axially close to the mounting cylinder 20, the circular truncated cone-shaped cylindrical shell 41 easily enters the narrow opening end 3a of the reflecting cup 3, so that the distance between the light source element 1 and the lens 2 is adjusted.

Referring to fig. 6 and 7, in another embodiment of the present application, the light source device 1 is fixed to the closed end 41a of the cylindrical shell 41 by a fixing member 50. The closed end 41a of the cylindrical shell 41 is opened with a clamping hole 411, the fixing member 50 comprises a pressing plate 51 and a buckle 52 arranged on the pressing plate 51, and the buckle 52 is buckled in the clamping hole 411, so that the light source element 1 is clamped between the pressing plate 51 and the outer wall of the closed end 41a of the cylindrical shell 41. The light source element 1 can be conveniently fixed on the heat dissipation element 40 through the fixing element 50, so that the light source element 1 is reliably attached to the heat dissipation element 40 to realize heat dissipation, and the light source element 1 is prevented from being separated from a preset position when external force acts on the down lamp. Specifically, the closed end 41a of the cylindrical case 41 has a plate shape, and the engaging hole 411 is provided in the plate-shaped portion. The latch 52 includes two latch arms 521, and a latch head 522 is provided at an outer side of an end of each latch arm 521. When the two snap arms 521 extend into the snap holes 411, the two snap arms 521 can elastically deform; after the latch arm 521 extends into the latch hole 411, the latch head 522 of the latch arm 521 is latched to the closed end 41a of the cylindrical shell 41, so that the fixing member 50 cannot be separated from the heat sink 40, and the light source 1 is limited.

Further, referring to fig. 6 and 7, the pressing plate 51 has a through hole 511 through which light from the light source unit 1 passes. The pressing plate 51 having the through-hole 511 can better fix the light source element 1 to the closed end 41a of the cylindrical case 41, and the light of the light source element 1 is passed through the through-hole 511.

Referring to fig. 6 and 7, in another embodiment of the present application, at least a portion of the driving assembly 80 is disposed in the cylindrical shell 41, the cylindrical shell 41 is used to block the light source 1 from the driving assembly 80, and heat generated by light emission of the light source 1 is transmitted to the external environment through the heat sink 40, so as to reduce the influence on the driving assembly 80, improve the reliability of the driving assembly 80, and fully utilize the space in the axial direction, thereby making the structure compact.

Referring to fig. 6 and 7, in another embodiment of the present application, a cover body 90 is disposed on a mouth portion cover of the cylindrical shell 41, the driving assembly 80 includes a driving control board 81 and a port 82 disposed on the driving control board 81, and the cover body 90 has an avoiding hole 91 for avoiding the port 82. The driving assembly 80 is accommodated between the cylindrical body and the cover body 90, so that the structure is compact. When the light source device 1 is assembled, the connector of the external wiring is inserted into the interface 82, so that the driving assembly 80 can be supplied with electric energy to supply power to the light source device 1. The cover body 90 can be inserted into the insertion hole of the heat sink 40 through the insertion post, so as to be fixed.

Referring to fig. 6 and 7, in another embodiment of the present application, the heat dissipation member 40 is a metal member formed integrally. The heat sink 40 having the cylindrical shell 41 and the annular wall 42 is manufactured by integral molding, which is convenient for mass production, and may be an aluminum member formed by die casting.

There are many possible implementations of the connection of mounting cylinder 20 to telescoping cylinder 30. The first realization mode is as follows: as shown in fig. 5, the mounting tube 20 is screwed to the telescopic tube 30, and the telescopic tube 30 moves in the axial direction of the mounting tube 20 relative to the mounting tube 20 when the telescopic tube 30 rotates relative to the mounting tube 20. Such that telescoping cylinder 30 is telescopically movable relative to mounting cylinder 20. Specifically, one structural member of the mounting cylinder 20 and the telescopic cylinder 30 is provided with a male thread 32, the other structural member is provided with a thread groove 21, and the thread groove 21 is matched with the male thread 32. There is friction between the male thread 32 and the inner wall of the thread groove 21, and the telescopic cylinder 30 is maintained at the position after the position of the telescopic cylinder 30 relative to the mounting cylinder 20 is adjusted.

The second implementation mode is as follows: as shown in fig. 8, the mounting tube 20 is sleeved outside the telescopic tube 30, and the damper 5 is disposed between the mounting tube 20 and the telescopic tube 30. Such that telescoping cylinder 30 is telescopically movable relative to mounting cylinder 20. The damper 5 is provided so that a frictional force can be generated between the mounting tube 20 and the damper 5 and between the telescopic tube 30 and the damper 5, and the telescopic tube 30 can be maintained at the position after the position of the telescopic tube 30 relative to the mounting tube 20 is adjusted. The damping piece 5 can be a silica gel ring, can generate elastic deformation and generate friction force with a contact surface.

The third implementation mode is as follows: as shown in fig. 9, the installation tube 20 is sleeved outside the telescopic tube 30, the inner wall of the installation tube 20 is provided with a straight rib 24, the outer wall of the telescopic tube 30 is provided with a straight groove 33, and the straight rib 24 is matched with the straight groove 33. Such that telescoping cylinder 30 is telescopically movable relative to mounting cylinder 20. There is friction between the straight ribs 24 and the inner wall of the straight groove 33, and after the position of the telescopic cylinder 30 relative to the mounting cylinder 20 is adjusted, the telescopic cylinder 30 is maintained at the position.

The fourth implementation manner is: outside the telescopic cylinder was located to the installation section of thick bamboo cover, the inner wall of installation section of thick bamboo was equipped with the straight flute, and the outer wall of telescopic cylinder is equipped with straight rib, straight rib and straight flute looks adaptation. Thus, the telescopic cylinder can move telescopically relative to the mounting cylinder. The straight ribs and the inner wall of the straight groove have friction force, and after the position of the telescopic cylinder relative to the installation cylinder is adjusted, the telescopic cylinder is maintained at the position.

Referring to fig. 5, in another embodiment of the present application, the extended length of the male thread 32 is smaller than the extended length of the thread groove 21 when the mounting cylinder 20 is screwed with the telescopic cylinder 30. The convex thread 32 is matched with the thread groove 21, so that the sliding connection between the convex thread 32 and the thread groove 21 can be realized, and further, the threaded connection between the installation cylinder 20 and the telescopic cylinder 30 can be realized. This allows male thread 32 to be made relatively small, facilitating sliding connection of male thread 32 to thread groove 21.

Illustratively, three thread grooves 21 are formed on the mounting cylinder 20, three male threads 32 are formed on the telescopic cylinder 30, and the three male threads 32 are arranged corresponding to the three thread grooves 21, so that the telescopic cylinder 30 can stably and smoothly slide relative to the mounting cylinder 20. It will be appreciated that in other implementations, the number of thread grooves 21 and male threads 32 is the same as and greater than one, which facilitates a smooth and stable sliding of telescoping cylinder 30 relative to mounting cylinder 20.

Referring to fig. 5, in another embodiment of the present application, the pitch is the distance between two adjacent threads measured along the helical direction. When the thread groove 21 is arranged on the installation cylinder 20, the axial height H range of the installation cylinder 20 is 0.8 times to 1.2 times of the thread pitch P of the thread groove 21, namely, the axial height H range of the installation cylinder 20 is approximately equal to the thread pitch P of the thread groove 21, so that the thread pitch P of the thread groove 21 is larger, the height size of the installation cylinder 20 can be smaller, the axial position of the telescopic cylinder 30 relative to the installation cylinder 20 can be quickly adjusted by screwing the telescopic cylinder 30 to a smaller angle, the distance between the light source part 1 and the lens 2 is quickly adjusted, and the use is convenient. Illustratively, the axial height H of the mounting cylinder 20 is set to 0.9, 1 or 1.1 times the pitch P of the thread groove 21. By setting the appropriate development length and pitch of the thread groove 21, the light emission angle can be set between 40 ° and 80 °.

It will be appreciated that where the thread groove is provided in the telescopic cylinder, the axial height of the telescopic cylinder will be in the range 0.8 to 1.2 times the pitch of the thread groove. The axial height scope of a telescopic cylinder is about equal to the pitch of thread groove promptly, and the pitch of thread groove is bigger like this, and the height dimension of a telescopic cylinder can be made less moreover, through revolving the less angle of a telescopic cylinder, can adjust the axial position of a telescopic cylinder relative installation section of thick bamboo relatively fast to the interval of quick adjustment light source spare and lens, convenient to use.

Illustratively, the axial height of the mounting cylinder 20 is equal to the axial height of the telescopic cylinder 30, so that when the telescopic cylinder 30 is completely retracted into the mounting cylinder 20, the down lamp has a smaller size in the height direction and a compact structure. The height direction is the up-down direction in fig. 6.

Referring to fig. 3, 4 and 6, in another embodiment of the present application, the tube light further includes a rotating ring 60 rotatably mounted on the face ring 10 around the axis of the face ring 10, the mounting cylinder 20 is rotatably mounted on the rotating ring 60, and a predetermined included angle is formed between the rotation axis of the mounting cylinder 20 relative to the rotating ring 60 and the rotation axis of the rotating ring 60 relative to the face ring 10. The rotary ring 60 is rotatable relative to the face ring 10, thus achieving horizontal rotation of the light source unit 1. The mounting cylinder 20 can be pivoted relative to the rotary ring 60, so that the light source unit 1 can be pivoted about an axis relative to the surface ring 10. The horizontal rotation and the swing of the light source 1 are combined to realize the universal rotation of the light source 1. Illustratively, the predetermined angle between the axis of rotation of the mounting cylinder 20 relative to the rotary ring 60 and the axis of rotation of the rotary ring 60 relative to the face ring 10 is 90 °. Of course, the predetermined included angle may be set to other angles.

Referring to fig. 3, 4 and 6, in another embodiment of the present application, an annular limiting groove 11 is formed on one surface of the surface ring 10, an axis of the annular limiting groove 11 coincides with an axis of the surface ring 10, and the rotating ring 60 can rotate in the annular limiting groove 11. The outer diameter of the rotating ring 60 is smaller than the inner diameter of the annular limiting groove 11, so that the position of the rotating ring 60 is limited, and the rotating angle of the rotating ring 60 relative to the ring 10 can be adjusted manually. As shown in fig. 4, the face ring 10 has an inner bore 121. Referring to fig. 3, the rotating ring 60 is supported on the bottom surface of the annular limiting groove 11, and the rotating ring 60 is rotatably mounted on the face ring 10. The surface ring 10 is provided with a limiting member 70, and the limiting member 70 is used for limiting the rotating ring 60 in the annular limiting groove 11.

Referring to fig. 4, in another embodiment of the present application, the face ring 10 includes an annular plate 12 and a circumferential wall 13, an inner hole 121 is formed on the annular plate 12, the circumferential wall 13 is connected to a surface of the annular plate 12, and a portion of the annular plate 12 near the inner hole 121 and the circumferential wall 13 form a circumferential limiting groove 11. The face ring 10 with the ring plate 12 and the circumferential wall 13 is easy to manufacture. The annular limiting groove 11 in the face ring 10 is close to the inner hole 121. The maximum outer diameter of the rotating ring 60 is greater than the inner diameter of the inner bore 121. Referring to fig. 3, during assembly, the rotating ring 60 is placed in the annular limiting groove 11, so that the rotating ring 60 is supported on the bottom surface of the annular limiting groove 11 and cannot fall out of the inner hole 121.

Referring to fig. 3 and 4, in another embodiment of the present application, the rotating ring 60 includes a cylindrical wall 61 and a flange 62 connected to one end of the cylindrical wall 61, the flange 62 is a portion of the rotating ring 60 with the largest outer diameter, and the flange 62 abuts against the bottom surface of the annular limiting groove 11, i.e. the flange 62 is supported on the annular plate 12 near the inner hole 121. The rotating ring 60 is provided as part of the cylindrical wall 61 to facilitate the connection between the mounting cylinder 20 and the cylindrical wall 61.

Referring to fig. 3, 4 and 6, in another embodiment of the present application, the position-limiting member 70 includes a first position-limiting screw 71 mounted on the face ring 10, and the first position-limiting screw 71 is engaged with the end edge of the cylindrical wall 61 to block the rotating ring 60 from separating from the annular position-limiting groove 11. When the rotating ring 60 moves in a direction (upward direction in fig. 6) away from the inner hole 121 of the face ring 10, the first limiting screw 71 abuts against the end of the cylindrical wall 61, so that the rotating ring 60 does not separate from the annular limiting groove 11. The first limit screw 71 is disposed at a proper position to limit the rotation ring 60. Illustratively, the first limiting screw 71 may penetrate through the annular wall 13 of the face ring 10 inward in the radial direction of the face ring 10; alternatively, the circumferential wall 13 is provided with coupling arms 14, and the first stop screws 71 can pass through the coupling arms 14 radially inwardly of the face ring 10.

Referring to fig. 3, 4 and 6, in another embodiment of the present application, the position-limiting member 70 further includes a second position-limiting screw 72 mounted on the face ring 10, and the second position-limiting screw 72 cooperates with the flange portion 62 to block the rotating ring 60 from separating from the annular position-limiting groove 11. When the rotating ring 60 moves in a direction (upward direction in fig. 6) away from the inner hole 121 of the face ring 10, the second limit screw 72 abuts against the flange portion 62 at the end of the second limit screw 72, so that the rotating ring 60 does not separate from the annular limit groove 11. The second limiting screw 72 is disposed at a suitable position to limit the rotation ring 60, for example, the distance from the second limiting screw 72 to the bottom surface of the annular limiting groove 11 is greater than the thickness of the flanging part 62, and a certain space is reserved, so that the rotation ring 60 can rotate relative to the face ring 10. The distance from the first limiting screw 71 to the bottom surface of the annular limiting groove 11 is greater than the distance from the second limiting screw 72 to the bottom surface of the annular limiting groove 11, the rotating ring 60 is effectively limited on the face ring 10 through the action of the first limiting screw 71 and the second limiting screw 72, and the rotating ring 60 can flexibly rotate relative to the face ring 10.

Further, referring to fig. 3 and 4, the rotating ring 60 is provided with a blocking wall 63, and the blocking wall 63 is used for abutting and matching with the second limiting screw 72 to limit the rotating range of the rotating ring 60 relative to the face ring 10, so that the rotating ring 60 can be limited to rotate only one circle, and the winding caused by multiple rotations of the wiring position after multiple rotations of the rotating ring 60 is avoided. Illustratively, the stopper wall 63 is provided between the cylindrical wall 61 and the burring 62 at a position that can interfere with the distal end of the second stopper screw 72.

It can be understood that, when the limiting member 70 includes the first limiting screw 71 and the second limiting screw 72, only one first limiting screw 71 and one second limiting screw 72 are provided, the rotating ring 60 can be limited in the annular limiting groove 11, so that the down lamp has a simple structure and is easy to assemble. Illustratively, the first limit screw 71 is coaxially disposed with the second limit screw 72, which can reliably limit the rotating ring 60 within the annular limit groove 11.

Referring to fig. 3, 4 and 6, in another embodiment of the present application, two connection holes 611 are formed on an inner side surface of the cylindrical wall 61, and the two connection holes 611 are coaxially disposed; two connecting shafts 22 are arranged on the outer side surface of the mounting cylinder 20, and the two connecting shafts 22 are coaxially arranged. In assembling, the two connecting shafts 22 are disposed in the two connecting holes 611 in a one-to-one correspondence, so that the mounting cylinder 20 can be easily rotatably connected to the rotating ring 60.

Referring to fig. 4 and 6, in another embodiment of the present application, the mounting tube 20 is rotatably connected to the cylindrical wall 61 by two fixing screws 23 disposed opposite to each other, and the fixing screws 23 pass through the connecting holes 611 of the cylindrical wall 61 and are screwed to the connecting shaft 22 of the mounting tube 20. The fixing screw 23 penetrates through the connecting hole 611 of the cylindrical wall 61 and the connecting shaft 22 of the mounting cylinder 20 to limit the connecting shaft 22 at the connecting hole 611, and the screwed fixing screw 23 can provide a certain damping force between the contact surfaces of the mounting cylinder 20 and the cylindrical wall 61, so that after the swing angle of the mounting cylinder 20 is adjusted, the mounting cylinder 20 can be positioned at the swing angle position.

The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.

Claims (10)

1. A down lamp is characterized by comprising a surface ring, an installation cylinder, a telescopic cylinder, a heat radiating piece, a light source piece and a driving assembly; the mounting cylinder is mounted on the face ring; one end of the telescopic cylinder is provided with a light outlet; the telescopic cylinder is mounted on the mounting cylinder in a sliding manner along the axial direction of the mounting cylinder; the heat dissipation piece comprises a cylindrical shell and an annular wall, one end of the cylindrical shell is a closed end, and the annular wall is connected to the edge of the other end of the cylindrical shell; the annular wall is connected to one end of the mounting cylinder, and the cylindrical shell extends into the mounting cylinder; the light source part is arranged on the outer wall of the closed end of the cylindrical shell, and the light emitting surface of the light source part faces the light outlet; the driving component is electrically connected with the light source component.

2. A downlight according to claim 1 further comprising a lens, the lens being disposed at the light exit.

3. The downlight of claim 2, wherein the telescopic tube has a reflector cup disposed therein, the reflector cup having opposite narrow and flared ends, the flared end being disposed proximate the light exit, a portion of the lens being received in the flared end, the light source being disposed proximate the narrow end of the reflector cup, the tubular shell being capable of extending into the narrow end.

4. The downlight of claim 1, wherein a portion of the annular wall is frustoconical, and an outer diameter of the frustoconical portion of the annular wall increases in a direction from the light source element toward the light exit.

5. A downlight according to claim 1 wherein the cylindrical shell is frustoconical, the outer diameter of the cylindrical shell tapering in a direction from the light source element to the light exit port.

6. A downlight according to claim 1 wherein the light source member is secured to the closed end of the cylindrical housing by a fixing; the closed end of the cylindrical shell is provided with a clamping hole, the fixing piece comprises a pressing plate and a buckle arranged on the pressing plate, and the buckle is buckled in the clamping hole so that the light source piece is clamped between the pressing plate and the outer wall of the closed end of the cylindrical shell.

7. A downlight according to claim 6, wherein the pressure plate has a through-opening through which light from the light source element passes.

8. A downlight according to claim 1 wherein the drive assembly is at least partially disposed within the cylindrical housing.

9. The downlight of claim 1, wherein the mouth portion of the cylindrical shell is covered with a cover body, the driving assembly comprises a driving control board and an interface arranged on the driving control board, and the cover body is provided with an avoidance hole for avoiding the interface.

10. A downlight according to any one of claims 1 to 9, wherein the mounting barrel is in threaded connection with the telescopic barrel, and the telescopic barrel moves relative to the mounting barrel in the axial direction of the mounting barrel when the telescopic barrel rotates relative to the mounting barrel;

or the mounting cylinder is sleeved outside the telescopic cylinder, and a damping part is arranged between the mounting cylinder and the telescopic cylinder;

or the installation cylinder is sleeved outside the telescopic cylinder, the inner wall of the installation cylinder is provided with a straight rib, the outer wall of the telescopic cylinder is provided with a straight groove, and the straight rib is matched with the straight groove;

or, the installation barrel sleeve is arranged outside the telescopic barrel, the inner wall of the installation barrel is provided with a straight groove, the outer wall of the telescopic barrel is provided with a straight rib, and the straight rib is matched with the straight groove.

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