Lighting fixtures

Abstract

A lighting fixture includes a lamp tube, a bracket, and a light-emitting unit. The lamp tube extends along a length direction and defines a central axis. The bracket extends along the length direction and is disposed within the lamp tube. The light-emitting unit includes at least one light strip disposed on the bracket and emitting light that faces away from the central axis and projects onto the lamp tube. The at least one light strip abuts against a corresponding bracket and the lamp tube. The at least one light strip does not overlap the central axis. Due to the structural design of the bracket, the light emitted by the light strip only needs to penetrate the lamp tube to reach the outside compared to conventional techniques, increasing the luminous efficiency of the lighting fixture. Furthermore, the light strip is tightly disposed on the mounting base without the need for other components for fixation, thus saving costs.

Description

[Technical Field]

[0001] This invention relates to a lamp, and more particularly to a lamp in which a light strip is built into the lamp tube. [Previous Technology]

[0002] A conventional lamp includes an outer tube made of glass, an inner tube made of plastic located inside the outer tube, a sheet-like support disposed inside the inner tube, and two lamp strips mounted on opposite sides of the support. The lamp extends along a length direction and defines a central axis. The inner surface of the inner tube forms two opposing mounting rails for mounting the support. The support extends along the length direction and overlaps with the central axis of the lamp.

[0003] However, the placement of these light strips near the central axis increases the optical path of the light from the light strips to the lamp tube, thereby reducing the light intensity transmitted through the lamp tube. Furthermore, the light emitted by these light strips must pass through two layers of material—the inner tube and the outer tube—to reach the outside, further reducing the light that can pass through the lamp tube, and the luminous efficiency still needs improvement. In addition, conventional lamps typically require the light strips to be fixed to the bracket using double-sided tape, screws, etc., which is more cumbersome to manufacture and incurs additional manufacturing costs. [Summary of the Invention]

[0004] Therefore, the object of the present invention is to provide a lamp that can at least overcome the disadvantages of the prior art.

[0005] Therefore, the lamp of the present invention includes a lamp tube, a bracket, and a light-emitting unit.

[0006] The lamp extends along a length direction and defines a central axis.

[0007] The bracket extends along the length direction and is installed inside the lamp tube.

[0008] The light-emitting unit includes at least one light strip disposed on the bracket and emitting light that faces away from the central axis and projects onto the lamp tube. The at least one light strip abuts against the corresponding bracket and the lamp tube. The at least one light strip does not overlap the central axis.

[0009] The advantages of the present invention are: by means of the structural design of the bracket, the light emitted by the light strip only needs to pass through the lamp tube to reach the outside compared with the conventional technology, which can effectively increase the luminous efficiency of the lamp. Moreover, the light strip is tightly set on the mounting base without the need for other components to fix it, which can save costs.

Implementation Method

[0011] Before the present invention is described in detail, it should be noted that similar elements are represented by the same numbers in the following description.

[0012] Referring to Figures 1 to 3, a first embodiment of the lamp fixture of the present invention includes a lamp tube 1 extending along a length direction L1, a bracket 2 disposed within the lamp tube 1, a light-emitting unit 3 disposed within the lamp tube 1 and mounted on the bracket 2, a controller 4 disposed within the lamp tube 1, a clamping unit 5 clamping the outer periphery of the lamp tube 1, and two end caps 6 disposed at both ends of the lamp tube 1. This lamp fixture can be applied to indoor lighting, table lamps, advertising light boxes, etc.

[0013] The lamp tube 1 defines a central axis C1, and its cross-section is circular. The lamp tube 1 may be made of, but is not limited to, transparent glass, polycarbonate, etc.

[0014] The bracket 2 includes four mounting seats 21 with openings facing away from the central axis C1 and extending along the length direction L1, and four connecting walls 22 adjacent to the inner wall surface of the lamp tube 1 and connected to the mounting seats 21. The mounting seats 21 and the connecting walls 22 are arranged in an alternating manner and are connected adjacently. Each mounting seat 21 has two protrusions 211 protruding from the connecting walls 22 in a direction away from the lamp tube 1, and a support portion 212 connected to the protrusions 211 and spaced apart from the lamp tube 1. The bracket 2 may be, but is not limited to, made of polycarbonate.

[0015] The light-emitting unit 3 includes four light strips 31 respectively disposed on the mounting bases 21 and abutting against the lamp tube 1 and the bracket 2. The light emitted by the light strips 31 is directed toward the opening of each of the mounting bases 21 and projected onto the lamp tube 1. Each light strip 31 abuts against the inner wall surface of the lamp tube 1 with its side opposite to the central axis C1, and abuts against the bracket 2 with its side facing the central axis C1. Each light strip 31 has a circuit board 311 extending along the length direction L1 and abutting against the corresponding support portion 212, a plurality of light-emitting elements 312 mounted on the circuit board 311, and a plurality of encapsulation materials 313 respectively covering the light-emitting elements 312. Each circuit board 311 has a first abutting portion 311a located on the side facing the central axis C1. Each of the encapsulation materials 313 abuts against the inner wall surface of the lamp tube 1 and has a second abutment portion 313a located at one end opposite to the central axis C1. The lamp strips 31 are laterally clamped and limited by the protrusions 211.

[0016] In this embodiment, each light strip 31 is pressed between the light tube 1 and the bracket 2 by the second abutting portion 313a of the encapsulation material 313 tightly abutting against the inner wall surface of the light tube 1 and the first abutting portion 311a of the circuit board 311 tightly abutting against the corresponding support portion 212 of the bracket 2. In other embodiments, each light strip 31 may also include a block that extends vertically and abuts against the light tube 1 or the bracket 2, as long as the light strip 31 can be pressed between the light tube 1 and the bracket 2.

[0017] The controller 4 is electrically connected to the light strips 31.

[0018] The clamping unit 5 includes a mounting bracket 51, two clamping pieces 52 connected to the mounting bracket 51, two guide pieces 53 extending from the clamping pieces 52 in a direction opposite to the mounting bracket 51, and two cushioning materials 54 covering the clamping pieces 52 and the guide pieces 53. The clamping pieces 52 clamp the periphery of the lamp tube 1.

[0019] In this first embodiment, the number of light strips 31 and mounting bases 21 is the same, both being four. However, in other embodiments, the number of light strips 31 and mounting bases 21 is not limited; it can be one light strip 31 and one mounting base 21, or one light strip 31 and two mounting bases 21, as long as the number of light strips 31 is less than or equal to the number of mounting bases 21. Therefore, the manufacturer can standardize the production specifications of the bracket 2, and users can use the same specification of lamps and install different numbers of light strips 31 according to actual conditions.

[0020] Referring to Figure 4, the second embodiment of the lamp of the present invention differs from the first embodiment in that the lamp tube 1 is square tube in shape and its cross-section is rectangular ring.

[0021] Referring to Figure 5, the third embodiment of the lamp of the present invention differs from the first embodiment in that: the bracket 2 has six mounting seats 21, and three light strips 31 are respectively arranged in three adjacent mounting seats 21 to concentrate the direction of light illumination, which can be applied to situations where only one side of the light needs to be emitted, such as for advertising light boxes.

[0022] Referring to Figure 6, the fourth embodiment of the lamp of the present invention differs from the first embodiment in that: the bracket 2 has two mounting seats 21, each mounting seat 21 is planar, and each mounting seat 21 is connected at both ends to two adjacent connecting walls 22.

[0023] Referring to Figure 7, a fifth embodiment of the lamp of the present invention differs from the first embodiment in that: the bracket 2 is made of an elastic material and is tightly fitted inside the lamp tube 1, providing the lamp strips 31 with a constant elastic force against the central axis C1, so that the lamp strips 31 can be stably pressed against the inner circumferential surface of the lamp tube 1. In this embodiment, the material of the bracket 2 may be, but is not limited to, foam, sponge, rubber, silicone, etc.

[0024] The feature of this fifth embodiment is that the lamp tube 1, the bracket 2 and the lamp strips 31 are pressed against each other, making them more stable and not shaking.

[0025] In summary, the lamp of the present invention, by means of the structural design of the bracket 2, allows the light emitted by the light strip 31 to reach the outside only by passing through the lamp tube 1, which is different from the conventional technology. This can effectively increase the luminous efficiency of the lamp. Furthermore, the light strip 31 is tightly set on the mounting base 21 without the need for other components for fixation, which can save costs. Therefore, the purpose of the present invention can indeed be achieved.

[0026] However, the above description is only an embodiment of the present invention and should not be construed as limiting the scope of the present invention. Any simple equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the patent specification shall still fall within the scope of the patent of the present invention. [Simplified Explanation of the Diagram]

[0010] Other features and effects of the present invention will be clearly presented in the embodiments with reference to the drawings, wherein: Figure 1 is a perspective sectional view of a first embodiment of the lamp tube of the present invention; Figure 2 is an exploded perspective view of the first embodiment with one end cap omitted; Figure 3 is a sectional view of the first embodiment; Figure 4 is a sectional view of a second embodiment of the lamp tube of the present invention; Figure 5 is a sectional view of a third embodiment of the lamp tube of the present invention; Figure 6 is a sectional view of a fourth embodiment of the lamp tube of the present invention; and Figure 7 is a sectional view of a fifth embodiment of the lamp tube of the present invention.

Claims

1. A lighting fixture, comprising: a lamp tube extending along a length direction and defining a central axis; a bracket extending along the length direction and disposed within the lamp tube, including a plurality of mounting seats extending along the length direction and a plurality of connecting walls abutting against the inner wall surface of the lamp tube and connecting the mounting seats, the mounting seats and the connecting walls being arranged alternately and adjacently; and a light-emitting unit including at least one light strip disposed on the bracket and emitting light away from the central axis and projected onto the lamp tube, the at least one light strip abutting between the mounting seat of the bracket and the lamp tube, the at least one light strip not overlapping the central axis, and the number of the at least one light strip not exceeding the number of the mounting seats.

2. The luminaire as claimed in claim 1, wherein, The at least one light strip has a first abutting portion facing the central axis and abutting against the bracket, and a second abutting portion facing away from the central axis and abutting against the inner circumferential surface of the light tube.

3. The luminaire as claimed in claim 2, wherein, The at least one light strip has a circuit board extending along the length direction, a plurality of light-emitting elements mounted on the circuit board, and a plurality of encapsulation materials respectively covering the light-emitting elements. Each encapsulation material abuts against the inner wall surface of the light tube. The circuit board has a first abutting portion located on the side facing the central axis, and the encapsulation material has a second abutting portion located at one end opposite to the central axis.

4. The luminaire as claimed in claim 1, wherein, Each of the mounting bases has two protrusions extending from the two adjacent connecting walls toward the direction of the lamp tube, and a support portion connected to the protrusions and spaced apart from the lamp tube, the support portion being used for the at least one lamp strip to abut against.

5. The luminaire as claimed in claim 1, wherein, Each of the mounting bases is planar, and each of the mounting bases is connected at both ends to two adjacent connecting walls.

6. The luminaire as claimed in claim 1, wherein, The cross-section of the lamp tube is circular and ring-shaped.

7. The luminaire as claimed in claim 1, wherein, The cross-section of the lamp tube is rectangular and ring-shaped.

8. The luminaire as claimed in claim 1, wherein, The bracket is made of an elastic material and is tightly fitted inside the lamp tube, providing the lamp strip with a constant elastic force away from the central axis.

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