CN220287182U - Straight tube lamp - Google Patents

Abstract

The application discloses a straight tube lamp, which comprises a lamp tube with two end parts; the luminous component is arranged in the lamp tube; the end covers are plugged at two end parts of the lamp tube and comprise a tube wall and an end wall, the end wall is provided with a conductive piece electrically connected with the light-emitting component, and the inner surface of the tube wall is provided with a plurality of axial limiting parts with different diameters. This application prevents crooked straight tube lamp of end cover assembly, sets up a plurality of axial spacing portions that support the radial dimension of fluorescent tube tip different at the section of thick bamboo wall internal surface of end cover, and the fluorescent tube of different diameters supports the spacing portion that radial dimension is closest during the equipment to reduce even eliminate the contained angle between the central axis of post-assembly fluorescent tube and end cover, thereby improve the levelness of fluorescent tube and end cover equipment.

Description

Straight tube lamp

Technical Field

The application relates to the technical field of illumination, in particular to a straight tube lamp for improving assembly levelness of an end cover and a lamp tube.

Background

The straight tube lamp is a common lamp, has the advantage of wide illumination range, and is commonly used in places with larger areas such as office places, exhibition halls, restaurants and the like. The existing straight tube lamp is usually composed of end covers at two ends, a lamp tube in the middle and a luminous component, and the existing straight tube lamp is also matched with a corresponding lamp holder when in use. Typically, the wall of the end cap has a draft angle and the tube has a tolerance. If the actual diameter of the lamp tube and the actual inner diameter of the end cover are too large in value, an included angle is often formed between the lamp tube and the central axis of the end cover after the lamp tube and the end cover are assembled, and the end cover and the lamp tube are assembled to form a 'head-tilting', so that the whole lamp is difficult to be installed in a lamp holder.

Disclosure of Invention

In order to solve the above technical problem, the present application discloses a straight tube lamp that can improve end cover and fluorescent tube assembly levelness, include:

a lamp tube having two ends;

the luminous component is arranged in the lamp tube;

the end cover is sleeved at the end part of the lamp tube and comprises a cylinder wall and an end wall, a conductive piece electrically connected with the light-emitting component is arranged on the end wall, and a plurality of axial limiting parts which are propped against the end part and have different radial sizes are arranged on the inner surface of the cylinder wall.

The following provides several alternatives, but not as additional limitations to the above-described overall scheme, and only further additions or preferences, each of which may be individually combined for the above-described overall scheme, or may be combined among multiple alternatives, without technical or logical contradictions.

Optionally, the plurality of axial limiting portions are arranged from large to small in radial dimension along a direction approaching the end wall.

Optionally, the axial limiting portion extends along the circumference of the cylinder wall.

Optionally, the axial limiting part is an annular step located on the inner circumferential surface of the cylinder wall.

Optionally, the radial width of the annular step is 0.1-0.2 mm.

Optionally, the height difference of the adjacent two-stage annular step surfaces is 0.2-0.4 mm.

Optionally, the number of the axial limiting parts is 2-6.

Optionally, the inner surface of the cylinder wall has a draft angle.

This application prevents crooked straight tube lamp of end cover assembly, sets up a plurality of axial spacing portions that support the radial dimension of fluorescent tube tip different at the section of thick bamboo wall internal surface of end cover, and the fluorescent tube of different diameters supports the spacing portion that radial dimension is closest during the equipment to reduce even eliminate the contained angle between the central axis of post-assembly fluorescent tube and end cover, thereby improve the levelness of fluorescent tube and end cover assembly.

Drawings

FIG. 1 is a schematic view of a straight tube lamp (partially omitted) with end cap assembly prevented from being skewed in accordance with one embodiment of the present application;

FIG. 2 is a schematic structural view of an end cap according to an embodiment of the present disclosure;

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

FIG. 4 is a right side view of an end cap according to one embodiment provided herein;

FIG. 5 is a schematic view of an assembled structure of a lamp tube and an end cap (partially omitted);

fig. 6 is an enlarged view at B in fig. 5.

Reference numerals in the drawings are described as follows:

10. a lamp tube; 11. an end portion; 12. a light emitting assembly; 13. an axial limit part; 14. a conductive member; 20. an end cap; 21. a cylinder wall; 22. an end wall; 23. a limiting surface; 24. an abutment surface; 25. demoulding inclination; l, radial width of the annular step; h. the height difference of two adjacent annular steps.

Detailed Description

The following description of the technical solutions in the embodiments of the present application will be made clearly and completely with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

The reason for the problem is that the lamp tube is linear after the straight tube lamp is assembled, the mold process of the end cover has demolding inclination in the production process, and the central axis of the lamp tube and the demolding inclination of the end cover have an included angle; meanwhile, the diameter of the lamp tube has tolerance in production, the end cover has tolerance in production, the tolerance of the lamp tube is different from the tolerance of the end cover and has discrete shape, so that the lamp tube and the end cover have gaps after assembly, the lamp tube of each straight tube lamp and the end cover have different gaps, the lamp tube cannot be concentric and parallel after assembly, and an included angle always exists, so that the end cover and the lamp tube have a 'head-tilting' phenomenon.

In order to solve the above problems, the present application provides a straight tube lamp for preventing an end cap assembly from being skewed, as shown in fig. 1-2, including a lamp tube 10 and an end cap 20. The lamp vessel 10 has two ends 11, and a light emitting assembly 12 is arranged inside the lamp vessel 10. The end cover 20 is sleeved at the end part 11 of the lamp tube 10, the end cover 20 comprises a cylinder wall 21 and an end wall 22, the outer edge of the end wall 22 extends to one side parallel to the central axis direction to form the cylinder wall 21, a plurality of axial limiting parts 13 which are abutted against the end part 11 and have different radial sizes are arranged on the inner surface of the cylinder wall 21, and a conductive part 14 which is electrically connected with the light-emitting component 12 is arranged on the end wall 22.

The axial limiting parts 13 with different radial dimensions are arranged at the contact positions of the end parts 11 of the lamp tubes 10 and the end covers 20, and the lamp tubes 10 with different diameters are abutted against the axial limiting parts 13 with the closest dimensions when assembled with the end covers 20, so that the lamp tubes 10 are coaxial with the end covers 20 as much as possible, the included angles between the central axes of the lamp tubes 10 and the end covers 20 are reduced or even eliminated, and the assembly levelness of the lamp tubes 10 and the end covers 20 is improved.

In some embodiments, as shown in fig. 2, the plurality of axial restraint portions 13 are arranged in a radial dimension from large to small in a direction approaching the end wall 22. The axial limiting part 13 with the smallest radial dimension is positioned close to the end wall 22, and the axial limiting part 13 with the largest radial dimension is positioned far away from the end wall 22, so that the lamp tubes 10 with different diameters can be conveniently inserted into the end cover 20, and along with the increase of the insertion depth of the lamp tube 10, the lamp tubes are abutted against the axial limiting part 13 with the nearest radial dimension to the lamp tube 10, and the different axial limiting parts 13 independently play roles according to the diameter of the lamp tube 10 and cannot interfere with each other.

In some embodiments, as shown in fig. 3-4, the axial stop 13 extends circumferentially along the barrel wall 21, perpendicular to the end wall 22 and centered coaxially with the end wall 22. The axial limiting portion 13 is an annular step having a limiting surface 23 parallel to the inner side surface of the cylinder wall 21 and an abutment surface 24 perpendicular to the inner side surface of the cylinder wall 21. When the lamp 10 is inserted into the end cap 20, the abutment surface 24 abuts against the vertical surface of the end 11 of the lamp 10, so that the lamp 10 is perpendicular to the end wall 22. The limiting surface 23 abuts against the horizontal surface of the end part 11, so that the lamp tube 10 is parallel to the inner side surface of the end cover 20, and the lamp tube 10 is concentric with the end cover 20 as much as possible, thereby improving the levelness of the assembly of the lamp tube 10 and the end cover 20.

In some embodiments, the specific dimensions of the annular steps may be determined according to the diameter tolerance of the lamp tube 10 and the tolerance of the end cap 20, in which the outer diameter of the lamp tube 10 is 25.4mm, the tolerance is ±0.4mm, and the tolerance of the end cap 20 is ±0.1mm during the production process, so that the radial width L of the annular steps is set to 0.1 to 0.2mm, the height difference h of the adjacent two-stage annular steps is 0.2 to 0.4mm, and the number of the axial limiting parts 13 is 2 to 6. The number of the axial limit portions 13 may be selected according to actual needs, and 4 are selected as illustrative examples in the present embodiment.

In some embodiments, as shown in fig. 5-6, the inner surface of the barrel wall 21 has a draft angle 25, which draft angle 25 is provided not only to facilitate demolding but also to extend the useful life of the mold. The axial stoppers 13 are provided near the release slope 25 and the end wall 22, and the vertical surface of the end 11 of the lamp tube 10 is in contact with the abutment surface 24, and neither the horizontal surface of the end 11 is in contact with the stopper surface, nor the surface having the release slope 25. Thereby eliminating the angle between the lamp tube 10 and the central axis of the end cap 20 due to the draft angle 25. Thereby improving levelness of the assembly of the lamp tube 10 and the end cap 20. Thereby eliminating the phenomenon of head tilting.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description. When technical features of different embodiments are embodied in the same drawing, the drawing can be regarded as a combination of the embodiments concerned also being disclosed at the same time.

The above examples merely represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the utility model. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.

Claims (8)

1. Straight tube lamp, its characterized in that includes:

a lamp tube having two ends;

the luminous component is arranged in the lamp tube;

the end cover is sleeved at the end part of the lamp tube and comprises a cylinder wall and an end wall, a conductive piece electrically connected with the light-emitting component is arranged on the end wall, and a plurality of axial limiting parts which are propped against the end part and have different radial sizes are arranged on the inner surface of the cylinder wall.

2. The straight tube lamp of claim 1 wherein the plurality of axial restraint portions are arranged from large to small in radial dimension in a direction proximate the end wall.

3. The straight tube lamp of claim 1 wherein the axial stop is disposed extending circumferentially along the barrel wall.

4. A straight tube lamp according to claim 3, wherein the axial limiting portion is an annular step located on the inner peripheral surface of the cylinder wall.

5. A straight tube lamp according to claim 4, wherein the radial width of the annular step is 0.1-0.2 mm.

6. A straight tube lamp according to claim 4, wherein the difference in height between the adjacent two annular steps is 0.2 to 0.4mm.

7. The straight tube lamp according to claim 1, wherein the number of the axial limiting portions is 2 to 6.

8. The straight tube lamp of claim 1 wherein the inner surface of the barrel wall has a draft angle.