Shell for long and thin lamp and lamp

Abstract

The utility model discloses a shell for a long and thin lamp and the lamp. The shell for the long and thin lamp is in a tubular shape extending in the longitudinal direction, the wall thickness of the shell is larger than 2.5 mm, the shell is formed by winding and bonding multiple layers of paper, the multiple layers of paper comprise at least one inner side layer, at least one middle layer and at least one outer side layer, and at least one opening is further formed in the side wall of the shell and serves as a light emitting window of the lamp. A luminaire including the housing for an elongated luminaire is also disclosed.

Description

Technical Field

[0001] The present application relates to a shell for a slender lamp and a lamp using the paper tube as the shell, and in particular to a slender paper lamp. Background Art

[0002] A method for manufacturing kraft paper tube 10 is shown in Figure 3 , is to spirally wind the paper tape 12 (14, 16) on the core shaft 1 in multiple layers, and use adhesive to bond the layers. After the adhesive dries, it is removed from the core shaft and cut into appropriate sizes. In order to improve the mechanical strength, adjacent parts of the spiral paper tape may overlap. In order to ensure the smooth appearance of the paper tube, the adjacent parts of the paper tape in each layer do not overlap, but the paper tapes of adjacent layers are staggered. The winding method shown in the figure is carried out simultaneously in multiple layers. Of course, there are other methods for making paper tubes, such as wrapping the paper layer by layer on the core shaft 1, pressing, gluing and then drying.

[0003] Because such paper tubes are biodegradable and inexpensive, they are widely used, for example, as mailing packages or internal structural supports for furniture. For the purpose of a circular economy, some people have proposed using such paper tubes as the outer shell of lamps. However, in actual applications, there are many technical problems that need to be solved. For example, it is well known that paper is flammable. As an electrical product, fire resistance is an important consideration for whether such paper tubes can be used in lamps. The vast majority of paper tubes made of paper on the market cannot meet the fire rating requirements of lighting equipment, and adding additional fireproof materials to paper tubes increases the complexity of manufacturing and increases costs.

[0004] China's national standard GB7000.1-2015 and the International Electrotechnical Commission standard IEC60598-1:2014 specify the requirements for the fire protection level of lighting equipment. Utility Model Content

[0005] After a lot of experiments, the inventor of the present application found a specific paper material, and the paper tube made of the paper material is used as the lamp housing, which can meet the fire protection requirements of the lighting equipment without adding additional materials such as fire extinguishing agents and flame retardants.

[0006] Based on the above understanding, the purpose of the present application is to provide a shell for a slender lamp, which is in the shape of a tube extending in the longitudinal direction, with a wall thickness greater than 2.5 mm, and is formed by winding and bonding multiple layers of paper, wherein the multiple layers of paper include at least one inner layer, at least one middle layer and at least one outer layer. The side wall of the shell is also provided with at least one opening serving as a light emitting window of the lamp.

[0007] For example, for a slender lamp of about one meter in length, its shell is generally a round tube with a diameter of about 40-80mm, or a rectangular tube with a cross-section of 40-80mm side length. In this case, the wall thickness is preferably 3mm. When a rectangular tube is used as the shell, a light exit window is opened on one side thereof. The area of ​​the light exit window can account for at least 90% of the area of ​​the side.

[0008] The inner layer, the middle layer and the outer layer may be made of one layer of paper or multiple layers of paper. For example, the outer layer may be made of two layers of paper that are staggered and overlapped to ensure a smooth and flat appearance. The middle layer may be made of three or more layers of paper to provide sufficient strength. Similarly, the inner layer may also be made of two layers of paper that are staggered and overlapped because it needs to be equipped with light sources, optical components and even driving components, and has high surface requirements.

[0009] In a preferred embodiment, the outer layer comprises kraft paper or cardboard; the middle layer comprises tube paper; and the inner layer comprises kraft paper or cardboard.

[0010] In another preferred embodiment, the outer layer comprises kraft paper or cardboard; the middle layer and the inner layer both comprise tube paper.

[0011] In another preferred embodiment, the outer layer comprises kraft paper or cardboard; the middle layer and the inner layer both comprise kraft paper or cardboard.

[0012] In a specific embodiment, the paper tube constituting the shell includes 6 layers of tube paper and an outer layer of kraft paper or cardboard, with a total wall thickness of about 3 mm.

[0013] In another specific embodiment, the paper tube constituting the shell includes 7 layers of kraft paper or cardboard, with a total wall thickness of about 2.6 mm.

[0014] Kraft paper, see GBT22865-2008; (white) cardboard, see GB / T22806-2008; this type of paper (kraft) has a smoother surface and a relatively dense structure. Bobbin paper, see QBT1457-1992, this type of paper (bobbin) is tough and wear-resistant, has good water resistance, can resist edge depression and withstand lathe processing when used. In the embodiment of the present application, when kraft paper or cardboard is used as one layer of the multi-layer paper, the specification of the kraft paper or cardboard is a ring crush strength index ≥8.5N·m / g and a gram weight range of 150-280g / m 2 When the tube paper is used as one layer of the multi-layer paper, the specification of the tube paper is a ring compression strength index ≥ 14N·m / g and a gram weight ≥ 360g / m 2The test methods for the above specifications can be found in Chinese national standards such as GB / T451.2-2002, GB / T2679.8-2016 or international organization standards such as ISO15754-2009.

[0015] In some embodiments, the at least one inner layer and / or the at least one outer layer further comprises a metal foil layer, such as aluminum foil.

[0016] The inner layer with aluminum foil is conducive to opening a light exit window on the side wall of the shell. The pure paper tube wall is mainly composed of wood fiber. When cutting, especially when cutting from the outside to the inside, the cutter will inevitably pull out the fiber on the inner edge of the paper tube wall, resulting in a brushed edge on the cut surface. However, aluminum foil does not contain fiber. When cutting the opening to make the light exit window, the cutter can leave a smooth cut surface on the aluminum foil layer, making the edge of the opening smooth and clean.

[0017] The outer layer with aluminum foil is fireproof and waterproof. Metal conducts heat quickly and is not easy to catch fire. It is also difficult for water vapor to penetrate the metal foil and penetrate into the shell.

[0018] In the specific manufacturing process, the aluminum foil layer can be attached to the surface of the corresponding paper layer; after the paper tube is wound and formed, the aluminum foil layer can be located at the outermost or innermost surface, or at the second layer from the outside (or inside). When the aluminum foil layer is located at the outermost surface, the paper tube has a metallic color, and when it is located at the second layer from the outside, the paper tube still has the original color of the paper.

[0019] In other specific manufacturing processes, a section of aluminum foil may be connected to the end of the paper before winding, and then the paper strip with the aluminum foil may be wound according to a common process so that the innermost or outermost layer of the paper roll is the aluminum foil.

[0020] In another aspect, the present application seeks to provide a lamp, which includes the aforementioned housing for a slender lamp; a light source component and an optical component are arranged inside the housing.

[0021] Preferably, the light source component includes a plurality of LED chips mounted on a strip substrate; the optical component includes a reflector and a diffuser; wherein the reflector surrounds the bottom and both sides of the light source component to form an optical cavity; the diffuser is arranged in the light emitting direction of the light source component and covers the opening of the side wall of the shell.

[0022] The paper tube of the present application is made of paper of specific specifications, and the manufactured lamp housing does not need to be additionally added with flame retardant. The manufactured lamp meets the fire protection grade specification of lighting equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 This is a schematic diagram of the appearance of the shell of this application;

[0025] Figure 2 A schematic diagram showing the (partial) appearance of the lamp of the present application; and

[0026] Figure 3 The paper tube manufacturing method of the prior art is illustrated. DETAILED DESCRIPTION

[0027] The principles of the present application will now be described with reference to the various exemplary embodiments shown in the accompanying drawings. It should be understood that the description of these embodiments is only to enable those skilled in the art to better understand and further implement the present application, and is not intended to limit the scope of the present application in any way. It should be noted that similar or identical reference numerals can be used in the figures where feasible, and similar or identical reference numerals can represent similar or identical functions. Those skilled in the art will readily recognize that, from the following description, alternative embodiments of the structures and methods described herein can be adopted without departing from the principles of the present application described herein.

[0028] As used herein, the term "including" and its various variations may be understood as open-ended terms, which mean "including but not limited to". The term "based on" may be understood as "based at least in part on". The term "one embodiment" may be understood as "at least one embodiment". The term "another embodiment" may be understood as "at least one other embodiment".

[0029] In the description of the embodiments of the present utility model, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Unless otherwise clearly specified and limited, the terms "connected", "associated", "connected", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances.

[0030] Figure 1A lamp housing 10 made of a paper tube according to the present application is shown, which extends along a longitudinal axis X, and has an opening 11 on its side wall.

[0031] See also Figure 2 A light source component 21 is installed in the housing 10, and a reflector 26 made of reflective paper can be arranged around it. The light source component 21 includes a strip-shaped substrate 22 and a plurality of LED chips 24 mounted on the substrate. The opening 11 on the side wall of the housing 10 is the light outlet window of the lamp. A diffuser (not shown) can also be arranged at the light outlet window to improve the uniformity of the light emitted by the lamp. End caps (not shown) can also be arranged at both ends of the housing 10 to close the two ends of the paper tube.

[0032] The multi-layer paper constituting the paper tube (ie, the housing 10 for the elongated lamp) can be divided into the multi-layer paper inner layer 12, the middle layer 14 and an outer layer 16 (see Figure 3 Mark). Each layer can include one or more layers of paper. Specifically, the paper used for each layer can include kraft paper, cardboard or tube paper. Among them, kraft paper and cardboard have smooth surfaces and are suitable for use on the inner and outer surfaces of paper tubes; tube paper has a strong structure and is made of recycled pulp with low cost, so it is suitable for use in the inner core of paper tubes. However, such a configuration is not absolute. All layers of the entire paper tube can also be made of kraft paper or cardboard, or all layers can be made of tube paper; it is also possible to use kraft paper or cardboard only on the outer layer and tube paper on the other layers.

[0033] It should be noted that the paper specifications that can make paper tubes meet the fire protection requirements of lighting products are: the ring compression strength index of kraft paper or cardboard is ≥8.5N·m / g and the gram weight range is 150-280g / m 2 ; Ring compression strength index of tube paper ≥14N·m / g and gram weight ≥360g / m 2 . The following Tables 1 and 2 list the composition of kraft paper or cardboard (collectively referred to as kraft cardboard) and tube paper. Glue is applied between the multiple layers of paper constituting the paper tube and then dried. The composition of the glue is listed in Table 3. The specifications of some tube paper and kraft cardboard are shown in Tables 4 and 5. According to the above requirements, suitable paper products can be selected from them to produce the paper tube with sufficient fire resistance involved in this application as the lamp housing.

[0034] Table 1: Composition of Kraft Paper

[0035] Ingredients Content (%wt) Plant cellulose 94.9 Fatty acid esters 0.1 Alkane oil 0.2 Aluminum oxide 1.0 Calcium carbonate 3.7 Magnesium Oxide 0.1

[0036] Table 2: Composition of tube paper

[0037] Ingredients Content (%wt) Plant cellulose 81.7 Fatty acid esters 0.3 Aluminum oxide 2.1 Calcium carbonate 9.4 Iron Oxide 0.4 Magnesium Oxide 0.6 Titanium Dioxide 0.2 Silicon dioxide 5.3

[0038] Table 3: Glue ingredients

[0039]

[0040] Table 4: Specifications of bobbin paper above Grade B

[0041]

[0042]

[0043] Table 5: Specifications of Kraft Paper

[0044]

[0045] In a specific embodiment, the length of the slender lamp is about one meter, and its shell is a round paper tube with a diameter of about 60 mm. In an alternative embodiment, the shell is a rectangular paper tube with a cross-sectional side length of about 60 mm. The corresponding paper tube is made of 6 layers of tube paper and 1 layer of kraft paper on the outside, with a total wall thickness of about 3 mm. In an alternative embodiment, the paper tube is made of 7 layers of kraft paper, with a total wall thickness of about 2.6 mm.

[0046] Kraft paperboard is made of sulfate pulp and treated with sodium sulfide during the production process, so it has a high sulfur content. Coil paper is made of recycled paper, not to mention that it also has a high sulfur content. When the lamps made of these materials are turned on, the temperature rises, which will cause trace sulfides to volatilize, and react with the silver electrode or reflective layer of the LED in the light source to cause it to turn black, resulting in a decrease in the light efficiency of the LED and even shortening the service life of the lamp. To this end, a certain baking process can be used to volatilize part of the sulfide first. Then, in normal use of the lamp, the amount of sulfide that is volatilized will be significantly reduced, achieving the purpose of extending the product life. Specifically, after the paper tube is formed, it can be cut to the required length and then placed in a baking device such as an oven. Bake the paper tube at a temperature of about 80°C for 2-4 hours, take it out, open the light outlet window, and finally trim, drill holes and install other components.

[0047] Metal foil can also be added to paper tubes to further improve their mechanical properties and fire and water resistance. For example, aluminum foil can be covered on the inner and outer surfaces of the paper tube, or embedded in multiple layers of paper below the surface. In specific production, the aluminum foil can be attached to the surface of the paper, or connected to the end of the paper, and then it is pressed, glued, and dried on the core shaft in the same way as normal paper winding or wrapping.

[0048] When the metal foil is on the outer surface of the paper tube, it can make the lamp appear metallic.

[0049] When the metal foil is located on the inner surface of the paper tube, it is conducive to opening a smooth and flat light outlet window.

[0050] When the metal foil is embedded in the paper tube interlayer, it not only maintains the original color of the paper tube, but also increases the performance of preventing water or water vapor from penetrating. At the same time, its extremely high thermal conductivity is beneficial to improving the fire resistance level of the paper tube.

[0051] Although some specific embodiments of the present application have been shown in detail by examples, it should be understood by those skilled in the art that the above examples are intended to be exemplary only and not to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments can be modified without departing from the scope and essence of the present application. The scope of the present application is defined by the appended claims. In the specification and the following claims, unless the context otherwise requires, the terms "include" and "comprise" are understood to include the components or groups of components described, but do not exclude any other components or groups of components. References to any prior art in this specification are not and should not be regarded as admitting that these prior arts constitute common knowledge.

Claims

1. A housing (10) for an elongated lamp, characterized in that: The shell is in the shape of a tube extending in the longitudinal direction (X) and has a wall thickness greater than 2.5 mm. It is formed by winding and bonding multiple layers of paper, wherein the multiple layers of paper include at least one inner layer (12), at least one middle layer (14) and at least one outer layer (16). The side wall of the shell is also provided with at least one opening serving as a light exit window of the lamp.

2. The housing (10) for an elongated lamp according to claim 1, characterized in that: The outer layer (16) comprises kraft paper or cardboard.

3. The housing (10) for an elongated lamp according to claim 2, characterized in that: The middle layer (14) comprises tube paper.

4. The housing (10) for an elongated lamp according to claim 3, characterized in that: The inner layer (12) comprises kraft paper or cardboard.

5. The housing (10) for an elongated lamp according to claim 2, characterized in that: The middle layer (14) and the inner layer (12) both comprise tube paper.

6. The housing (10) for an elongated lamp according to claim 2, characterized in that: The middle layer (14) and the inner layer (12) both comprise kraft paper or cardboard.

7. The housing (10) for an elongated lamp according to any one of claims 2 to 6, characterized in that: When kraft paper or cardboard is used as one layer of the multi-layer paper, the specification of the kraft paper or cardboard is that the ring crush strength index is ≥8.5N·m / g and the gram weight range is 150-280g / m 2 When the tube paper is used as one layer of the multi-layer paper, the specification of the tube paper is a ring compression strength index ≥ 14N·m / g and a gram weight ≥ 360g / m 2 .

8. The housing (10) for an elongated lamp according to claim 1, characterized in that: The at least one inner layer (12) and / or the at least one outer layer (16) further comprises a metal foil layer.

9. A lamp, characterized in that: It comprises a housing (10) for a slender lamp according to any one of claims 1 to 8; a light source component (21) and an optical component are arranged inside the housing.

10. The lamp according to claim 9, characterized in that: The light source component (21) comprises a plurality of LED chips (24) mounted on a strip substrate (22); the optical component comprises a reflector (26) and a diffuser; wherein the reflector (26) surrounds the bottom and both sides of the light source component (21) to form an optical cavity; and the diffuser is arranged in the light emitting direction of the light source component (21) and covers the opening of the side wall of the housing.

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