CN212390236U - Annular lamp tube and ceiling lamp - Google Patents

Abstract

The application discloses annular lamp tube and ceiling lamp. The ceiling lamp comprises a rear cover, a light source plate arranged on the inner side wall of the rear cover, a diffusion cover connected with the rear cover, and a light guide plate arranged between the rear cover and the diffusion cover; the light guide plate is provided with a light incident surface and a light emergent surface; the light incident surface is opposite to the light source plate; the light-emitting surface is opposite to the diffusion cover; the light incident surface and the light emergent surface form a preset angle. The light emitted by the light source plate on the inner side wall of the rear cover is emitted to the light incident surface of the light guide plate, and the light enters the light guide plate, is transmitted to all parts of the light emergent surface by the light guide plate and is emitted outwards through the light emergent surface. And further, the light source plate side light emitting mode is realized, and finally, light can be transmitted downwards in a straight line. Because the light rays which are transmitted downwards in the straight line are not directly emitted by the light source plate, but are indirectly transmitted under the action of the light guide plate, the light rays which are finally emitted downwards in the straight line are more uniform.

Description

Annular lamp tube and ceiling lamp

Technical Field

The application relates to the field of lighting equipment, in particular to an annular lamp tube and a ceiling lamp.

Background

Traditional ceiling lamps all are built-in annular fluorescent tube, and when built-in fluorescent tube reached life, other parts can also continue to use. Only the built-in ring-shaped lamp tube needs to be replaced. With the aging of LED (light emitting diode) lighting application, the LED module can replace the traditional fluorescent lamp tube, can achieve longer service life, and meet the requirements of customers. However, the existing annular lamp tubes are all direct-type to emit light, so that the problem of non-uniformity of light emission exists, and the granular sensation is obvious.

SUMMERY OF THE UTILITY MODEL

One of the objectives of the present application is to provide an annular lamp tube, which aims to solve the problem of uneven light emission of the annular lamp tube in the prior art.

To achieve the purpose, the embodiment of the application adopts the following technical scheme:

the annular lamp tube comprises a rear cover, a light source plate arranged on the inner side wall of the rear cover, a diffusion cover connected with the rear cover, and a light guide plate arranged between the rear cover and the diffusion cover; the light guide plate is provided with a light incident surface and a light emergent surface; the light incident surface is opposite to the light source plate; the light-emitting surface is opposite to the diffusion cover; the light incident surface and the light emergent surface form a preset angle.

In one embodiment, the annular lamp tube further comprises a reflective paper arranged in the rear cover, and the reflective paper is positioned on one side of the light guide plate, which faces away from the diffusion cover.

In one embodiment, the inner side wall of the rear cover is provided with a first mounting groove, and the diffusion cover is provided with a second mounting groove opposite to the first mounting groove; one side of the light source plate is inserted into the first mounting groove, and the other side of the light source plate is inserted into the second mounting groove.

In one embodiment, the rear cover has a first inner side wall and a second inner side wall which are oppositely arranged; the first inner side wall is provided with a first mounting table, and the second inner side wall is provided with a first limiting groove; the light guide plate is abutted against the first mounting table, and the light guide plate is abutted against the groove bottom of the first limiting groove.

In one embodiment, the diffusion cover is provided with a third inner side wall and a fourth inner side wall which are oppositely arranged; the first inner side wall is provided with the first mounting groove, the third inner side wall is provided with the second mounting groove, the third inner side wall is provided with a second mounting table, and the fourth inner side wall is provided with a second limiting groove; the light emitting surface of the light guide plate is abutted against the second mounting table, and the light guide plate is abutted against the groove bottom of the second limiting groove.

In one embodiment, the first inner side wall is provided with a first connecting bulge extending into the second mounting groove, and the second inner side wall is provided with a second connecting bulge extending into the second limiting groove; the first inner side wall is connected with the third inner side wall through ultrasonic welding, and the second inner side wall is connected with the fourth inner side wall through ultrasonic welding.

In one embodiment, the ring-shaped light tube further comprises a driving board electrically connected with the light source board; the rear cover is provided with a connecting column, a threaded hole is formed in the connecting column, a connecting through hole is formed in the driving plate, and a connecting screw is arranged between the driving plate and the connecting column; the connecting screw penetrates through the connecting through hole and is in threaded connection with the threaded hole; the light source board is characterized in that a first connecting wire is arranged between the driving board and the light source board, a connecting copper needle is arranged on the rear cover, and a second connecting wire is arranged between the connecting copper needle and the driving board.

In one embodiment, a supporting plate is arranged in the rear cover, and the reflective paper is mounted on the supporting plate.

Another object of the application is to provide a ceiling lamp, which is characterized by comprising a chassis, a lampshade and the annular lamp tube in any one of the above embodiments; the annular lamp tube is arranged on the chassis, and the lampshade is connected with the chassis and covers the annular lamp tube.

In one embodiment, a plurality of U-shaped clamping rings are arranged on the chassis, and the annular lamp tube is clamped in the U-shaped clamping rings.

The beneficial effects of the embodiment of the application are as follows: the light emitted by the light source plate on the inner side wall of the rear cover is emitted to the light incident surface of the light guide plate, and the light enters the light guide plate, is transmitted to all parts of the light emergent surface by the light guide plate and is emitted outwards through the light emergent surface. And further, the light source plate side light emitting mode is realized, and finally, light can be transmitted downwards in a straight line. Because the light rays which are transmitted downwards in the straight line are not directly emitted by the light source plate, but are indirectly transmitted under the action of the light guide plate, the light rays which are finally emitted downwards in the straight line are more uniform.

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 without creative efforts.

FIG. 1 is a schematic structural diagram of a circular lamp tube in an embodiment of the present application;

FIG. 2 is a cross-sectional view of an annular light tube at a light source board in an embodiment of the present application;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view of a portion of FIG. 2 at B;

FIG. 5 is a cross-sectional view of the circular light tube at the driving plate in an embodiment of the present application;

FIG. 6 is a schematic diagram illustrating an internal structure of the circular lamp at the driving board according to the embodiment of the present application;

FIG. 7 is a schematic structural view of a ceiling lamp according to an embodiment of the present application;

FIG. 8 is a schematic view of the internal structure of the ceiling lamp according to the embodiment of the present application;

in the figure:

1. a diffusion cover; 101. a second mounting groove; 102. a third inner side wall; 1021. a second mounting table; 103. a fourth inner side wall; 1031. a second limit groove;

2. a rear cover; 201. a first inner side wall; 2011. a first mounting table; 2012. a first connecting projection; 202. a second inner side wall; 2021. a first limit groove; 2022. a second connecting projection; 203. a first mounting groove; 204. connecting columns; 205. a support plate;

3. a light source plate;

4. a light guide plate; 401. a light incident surface; 402. a light-emitting surface;

5. reflective paper; 6. a drive plate; 7. a connecting screw; 8. a first connecting wire; 9. connecting a copper needle; 10. a chassis; 11. a lamp shade; 12. a terminal wire; 13. a U-shaped snap ring; 14. a second connecting wire.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further 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.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, refer to an orientation or positional relationship illustrated in the drawings for convenience in describing the present application and to simplify description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus 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.

The following detailed description of implementations of the present application is provided in conjunction with specific embodiments.

As shown in fig. 1 to 3, an embodiment of the present application provides an annular lamp tube, which includes a rear cover 2, a light source plate 3 mounted on an inner sidewall of the rear cover 2, a diffusion cover 1 connected to the rear cover 2, and a light guide plate 4 mounted between the rear cover 2 and the diffusion cover 1; the light guide plate 4 has a light incident surface 401 and a light emitting surface 402; the light incident surface 401 is arranged opposite to the light source plate 3; the light-emitting surface 402 is arranged opposite to the diffusion cover 1; the light incident surface 401 and the light emitting surface 402 form a predetermined angle (e.g., about 90 degrees, and may be two surfaces perpendicular to each other).

In the embodiment of the present application, the ring-shaped light tube emits light by a light emitting element such as a light emitting diode (led) on the light source plate 3 (which may be ring-shaped) located on the inner sidewall of the rear cover 2 to the light incident surface 401 of the light guide plate 4, and the light enters the light guide plate 4, is transmitted to all parts of the light emitting surface 402 by the light guide plate 4, and is emitted out through the light emitting surface 402. And then realize the luminous mode of light source board 3 side, finally can also the straight line downwardly propagating light. Because the light that the straight line propagated downwards is not by the direct outgoing of light source board 3, but through the effect of light guide plate 4, the indirect propagation of realization, consequently the light that final straight line jetted out downwards is comparatively gentle, and the light-emitting is even, and the graininess is not obvious, and illuminating effect is better.

In the embodiment of the present application, the light source board 3 may be a flexible light bar of FPC (flexible circuit board). It can be understood that the rear cover 2, the diffusion cover 1 and the light guide surface of the circular lamp are all ring-shaped. The light source plate 3 may be annular, or may be formed in an annular shape by surrounding the intermittent light source plate 3. The light source plate 3 may be in direct contact with the light incident surface 401 of the light guide plate 4, or may be disposed with a slight gap.

Referring to fig. 2, as another embodiment of the annular lamp tube provided in the present application, the annular lamp tube further includes a reflective paper 5 disposed in the rear cover 2, and the reflective paper 5 is located on a side of the light guide plate 4 opposite to the diffusion cover 1 (i.e., the reflective paper 5 is located on a back surface of the light emitting surface 402). The reflective paper 5 can reflect the light propagating back to the light emitting surface 402 and emit the light from the light emitting surface 402, so as to improve the utilization rate of the light source.

Referring to fig. 2-4, as another embodiment of the annular lamp provided by the present application, a first mounting groove 203 is formed on an inner side wall of the rear cover 2, and a second mounting groove 101 opposite to the first mounting groove 203 is formed on the diffusion cover 1; one side of the light source plate 3 is inserted into the first mounting groove 203, and the other side of the light source plate 3 is inserted into the second mounting groove 101. Therefore, after back lid 2 links to each other with diffusion cover 1, relative first mounting groove 203 and second mounting groove 101 can be with the spacing fixed of light source board 3, and then effectively fixed light source board 3. Of course, the back of the light source plate 3 may be glued so that the light source plate 3 is further fixed between the rear cover 2 and the diffusion cover 1 by gluing.

Referring to fig. 2-4, as another embodiment of the circular lamp provided by the present application, the rear cover 2 has a first inner sidewall 201 and a second inner sidewall 202 opposite to each other; the first inner side wall 201 is provided with a first mounting table 2011, and the second inner side wall 202 is provided with a first limit groove 2021; the inner edge of the light guide plate 4 abuts against the first mounting table 2011, and the outer edge of the light guide plate 4 abuts against the bottom of the first limit groove 2021. Therefore, the first mounting table 2011 supports the light guide plate 4, the groove bottom of the first limiting groove 2021 supports the light guide plate 4, and the inner side wall of the first limiting groove 2021 limits the light guide plate 4, so that the light guide plate 4 is prevented from sliding on a horizontal plane relative to the rear cover 2.

Referring to fig. 2-4, as another embodiment of the circular lamp provided by the present application, the diffusion cover 1 has a third inner sidewall 102 and a fourth inner sidewall 103 disposed oppositely; the first inner side wall 201 is provided with a first mounting groove 203, the third inner side wall 102 is provided with a second mounting groove 101, the third inner side wall 102 is provided with a second mounting platform 1021, and the fourth inner side wall 103 is provided with a second limiting groove 1031; the inner edge of the light emitting surface 402 of the light guide plate 4 abuts against the second mounting platform 1021, and the outer edge of the light emitting surface 402 of the light guide plate 4 abuts against the bottom of the second limiting groove 1031. And then realize after lid 2 links to each other with diffusion cover 1, fix the spacing with light guide plate 4, need not external mounting and can accomplish the installation of light guide plate 4. Meanwhile, the light source plate 3 is fixedly mounted after being connected with the diffusion cover 1 through the rear cover 2, so that the stability of connection between the rear cover 2 and the diffusion cover 1 is ensured, and the stability of the relative position between the light source plate 3 and the light guide plate 4 can be ensured. Because the relative stability in position between light source board 3 and the light guide plate 4, the light that consequently light source board 3 sent can be better outwards propagated, can guarantee the effect of light-emitting to promote the utilization ratio of light source. In particular, when the rear cover 2 is coupled to the diffusion cover 1 by ultrasonic welding, the position can be maintained stable for a long time.

Referring to fig. 2-4, as another embodiment of the annular lamp provided by the present application, a first connecting protrusion 2012 extending into the second mounting groove 101 is disposed on the first inner sidewall 201, and a second connecting protrusion 2022 extending into the second limiting groove 1031 is disposed on the second inner sidewall 202, so as to limit the diffusion cover 1 and the rear cover 2, which are not easily moved relative to each other after connection. The diffusion cover 1 and the rear cover 2 can be fixedly connected through ultrasonic welding between the first inner side wall 201 and the third inner side wall 102 and ultrasonic welding between the second inner side wall 202 and the fourth inner side wall 103. For example, the first connecting protrusion 2012 is connected to the bottom of the second mounting groove 101 by ultrasonic welding, so that the connecting position of the rear cover 2 and the diffusion cover 1 is not exposed, and the aesthetics of the lamp is ensured.

Referring to fig. 5-6, as another embodiment of the ring-shaped lamp provided by the present application, the ring-shaped lamp further includes a driving board 6 electrically connected to the light source board 3; the rear cover 2 is provided with a connecting column 204, a threaded hole is formed in the connecting column 204, a connecting through hole is formed in the driving plate 6, and a connecting screw 7 is arranged between the driving plate 6 and the connecting column 204; the connecting screw 7 penetrates through the connecting through hole and is in threaded connection with the threaded hole; a first connecting wire 8 is arranged between the driving plate 6 and the light source plate 3 to realize electric connection, a connecting copper needle 9 is arranged on the rear cover 2, and a second connecting wire 14 is arranged between the connecting copper needle 9 and the driving plate 6 to realize electric connection. The annular lamp tube also comprises a terminal wire 12 which is in plug fit with the connecting copper needle 9.

Referring to fig. 2-4, as another embodiment of the annular lamp tube provided in the present application, a supporting plate 205 is disposed in the rear cover 2, and the reflective paper 5 is mounted on the supporting plate 205, so that the reflective paper 5 can be tightly attached to a side surface of the light guide plate 4 opposite to the light exit surface 402, thereby ensuring the light exit efficiency of the light exit surface 402 of the light guide plate 4.

As shown in fig. 7-8, an embodiment of the present application provides a ceiling lamp, which includes a chassis 10, a lampshade 11, and a circular lamp tube according to any one of the embodiments described above; the circular lamp tube is installed on the chassis 10, and the lampshade 11 is connected with the chassis 10 and covers the circular lamp tube.

Referring to fig. 8, as another embodiment of the ceiling lamp provided by the present application, a plurality of U-shaped clasps 13 are disposed on the chassis 10, and the annular lamp is clamped in the U-shaped clasps 13. The annular lamp tube can be quickly assembled and disassembled with the chassis 10 through the U-shaped clamping ring 13, and when the annular lamp tube is damaged, the annular lamp tube is convenient for a user to replace.

It is to be understood that aspects of the present invention may be practiced otherwise than as specifically described.

It should be understood that the above examples are merely examples for clearly illustrating the present application, and are not intended to limit the embodiments of the present application. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims (10)

1. The annular lamp tube is characterized by comprising a rear cover, a light source plate arranged on the inner side wall of the rear cover, a diffusion cover connected with the rear cover and a light guide plate arranged between the rear cover and the diffusion cover; the light guide plate is provided with a light incident surface and a light emergent surface; the light incident surface is opposite to the light source plate; the light-emitting surface is opposite to the diffusion cover; the light incident surface and the light emergent surface form a preset angle.

2. The circular lamp tube according to claim 1, further comprising a reflective paper disposed in the rear cover, wherein the reflective paper is located on a side of the light guide plate facing away from the diffusion cover.

3. The circular lamp tube as claimed in claim 1, wherein the inner sidewall of the rear cover defines a first mounting groove, and the diffuser defines a second mounting groove opposite to the first mounting groove; one side of the light source plate is inserted into the first mounting groove, and the other side of the light source plate is inserted into the second mounting groove.

4. The circular tube of claim 3, wherein said rear cover has a first inner sidewall and a second inner sidewall disposed opposite to each other; the first inner side wall is provided with a first mounting table, and the second inner side wall is provided with a first limiting groove; the light guide plate is abutted against the first mounting table, and the light guide plate is abutted against the groove bottom of the first limiting groove.

5. The circular lamp tube according to claim 4, wherein said diffusion cover has a third inner sidewall and a fourth inner sidewall oppositely disposed; the first inner side wall is provided with the first mounting groove, the third inner side wall is provided with the second mounting groove, the third inner side wall is provided with a second mounting table, and the fourth inner side wall is provided with a second limiting groove; the light emitting surface of the light guide plate is abutted against the second mounting table, and the light guide plate is abutted against the groove bottom of the second limiting groove.

6. The circular lamp tube according to claim 5, wherein the first inner sidewall has a first connecting protrusion extending into the second mounting groove, and the second inner sidewall has a second connecting protrusion extending into the second limiting groove; the first inner side wall is connected with the third inner side wall through ultrasonic welding, and the second inner side wall is connected with the fourth inner side wall through ultrasonic welding.

7. The circular light tube according to any of claims 1-6, further comprising a driving board electrically connected to the light source board; the rear cover is provided with a connecting column, a threaded hole is formed in the connecting column, a connecting through hole is formed in the driving plate, and a connecting screw is arranged between the driving plate and the connecting column; the connecting screw penetrates through the connecting through hole and is in threaded connection with the threaded hole; the light source board is characterized in that a first connecting wire is arranged between the driving board and the light source board, a connecting copper needle is arranged on the rear cover, and a second connecting wire is arranged between the connecting copper needle and the driving board.

8. The circular lamp tube according to claim 2, wherein a supporting plate is provided in the rear cover, and the reflective paper is mounted on the supporting plate.

9. Ceiling lamp, characterized in that it comprises a chassis, a lamp shade, and a circular lamp tube according to any of claims 1-8; the annular lamp tube is arranged on the chassis, and the lampshade is connected with the chassis and covers the annular lamp tube.

10. The ceiling lamp of claim 9, wherein the chassis is provided with a plurality of U-shaped snap rings, and the annular lamp tube is snapped in the U-shaped snap rings.

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