JP2013077489A - Straight tube lamp, manufacturing method of straight tube lamp, and lighting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a sheet to be easily arranged on the outer circumference of a straight tube cover.SOLUTION: The straight tube lamp has a light source unit 20 with a light source portion 21 arranged, a straight tube cover 10 which has a translucent part 10a in at least one part, and houses the light source unit 20 so that emission light may be emitted from the translucent part 10a, and bases 30, 40 which are fixed respectively to both ends of the straight tube cover 10. Further, a sheet 50 of translucency is arranged at least on the outer circumferential surface of the translucent part 10a, and a tube 60 which covers the straight tube cover 10 from the outside of the sheet 50 is disposed.

Description

  Embodiments described herein relate generally to a straight tube lamp and a lighting device in which a sheet is disposed on the outer periphery.

  In general, a straight tube fluorescent lamp having G13 type caps at both ends from which a pair of cylindrical lamp pins protrude and a lighting device using a socket to which the fluorescent lamp is connected are often used.

  Further, a straight tube LED lamp having an external shape similar to that of a conventional fluorescent lamp and using an LED as a light source is known (for example, see “Patent Document 1”). The outer tube of these straight tube LED lamps is generally made of a resin such as glass or polycarbonate. The brightness of the LED is suppressed by imparting diffusibility to the outer tube.

JP 2006-17841 A

  However, for example, when such a straight tube LED lamp is used in a lighting fixture mounted on a railway vehicle, it is necessary to satisfy a railway vehicle standard that is stricter than the flame retardance standard that is a standard related to building materials. is there. The railway vehicle standards are also becoming stricter, and the materials used for vehicle lighting equipment at this time are the new combustion regulations issued by the Ministry of Land, Infrastructure, Transport and Tourism regarding vehicle interior materials issued on December 27, 2004. Must meet the standards (JNR 124 and 125).

  This standard defines two types of tests (combustion test and cone calorimeter combustion heat generation test), and interior materials that have cleared both tests are certified as “non-combustible materials” based on the standard. For this reason, when a straight tube lamp using a resin such as polycarbonate is used for a lighting fixture mounted on a railway vehicle, a non-combustible sheet that satisfies the above standards is arranged in the straight tube lamp. It will be a challenge.

  On the other hand, when glass is used as the straight tube cover of the straight tube lamp, it has been costly to provide the straight tube cover with light diffusibility.

  The problem to be solved by the present invention is to provide a straight tube lamp, a method for manufacturing a straight tube lamp, and an illumination device that can easily arrange a sheet on the outer periphery of the straight tube cover.

  The straight tube lamp of the embodiment includes a light source unit in which a light source unit is disposed and a light transmitting unit at least partially, and a straight tube that houses the light source unit so that emitted light is emitted from the light transmitting unit. A cover and a base fixed to each end of the straight pipe cover are provided. In addition, a translucent sheet is disposed at least on the outer peripheral surface of the translucent part, and a tube that covers the straight pipe cover is provided from the outside of the sheet.

  According to the present invention, it can be expected that the sheet is easily disposed on the outer periphery of the straight pipe cover.

It is a front view of the straight tube | pipe type lamp which shows 1st Embodiment. It is sectional drawing of a straight tube | pipe type lamp same as the above. It is a perspective view which shows a mode when a straight tube | pipe type lamp | ramp is inserted in a tube. It is a front view which shows a mode when a straight tube | pipe type lamp is inserted in a tube. It is a front view of the straight tube | pipe type lamp which shows 2nd Embodiment. It is a side view of the illuminating device using a straight tube | pipe type lamp. It is a perspective view of an illuminating device same as the above.

  Hereinafter, a first embodiment will be described with reference to FIGS. 1 and 2. FIG. 2 is a cross-sectional view taken along the line AA in FIG. 1, and the base configuration is omitted.

  As shown in FIG. 1 and FIG. 2, the straight tube lamp 1 is formed in a straight tube shape with a tube length and a tube diameter comparable to those of the arc tube of a straight tube fluorescent lamp, and as a straight tube cover having a translucent portion. The translucent cover 10, the light source unit 20 accommodated in the translucent cover 10, and the caps 30 and 40 fixed to both ends of the light source unit 20, respectively.

  The base 30 on one end of the straight tube lamp 1 is a power supply side attached to the socket on the power supply side, and the base 40 on the other end side of the straight tube lamp 1 is on the non-power supply side attached to the socket on the ground side. There is a certain earth side. The base 40 on the ground side may be either attached to the socket or may be attached only to the socket.

  A pair of lamp pins 31 that are electrically connected to the light source unit 20 protrude from the end face of the base 30 on the power supply side. These lamp pins 31 are formed of a flat plate having a quadrangular cross section, projecting along the longitudinal direction of the straight tube lamp 1, and the leg 31a from the tip of the leg 31a to the other leg 31a. It is bent and formed in an L shape having a protruding portion 31b protruding outward so as to be separated from each other. The plate thickness of the lamp pin 31 is 1 mm, the distance between the centers of the leg portions 31a of the pair of lamp pins 31 is 16 mm, and the distance between the leg portions 31a of the pair of lamp pins 31 is 15 mm. In contrast, the G13 type base has a pair of lamp pins with a diameter of 2.29 to 2.67 mm, a distance between the centers of the pair of lamp pins of 12.7 mm, and a distance between the outside of the pair of lamp pins of 15.17 mm. Therefore, the pair of lamp pins 31 of the base 30 on the power supply side are different in shape from the pair of lamp pins of the G13-type base and are wider than the pair of lamp pins of the G13-type base, and are compatible with the G13-type base. There is no sex.

  The end face of the base 40 is provided with a cylindrical base 41a and a ground pin 41 having a substantially elliptical engaging portion 41b at the tip of the base 41a.

The translucent cover 10 is, for example, transparent polycarbonate (PC), and the entire translucent cover 10 has a translucent portion 10a. In addition, a translucent resin or glass may be used. A pair of locking projections 10b are provided on the inner surface of the translucent cover 10.

  The light source unit 20 includes a long substrate 22 on which a plurality of LEDs 21 as a light source unit are mounted with a predetermined interval in the longitudinal direction, and a support 23 to which the substrate 22 is attached.

  As the LED 21, a COB (Chip On Board) system in which a plurality of semiconductor light emitting elements such as LED elements and EL elements are mounted on the substrate 22 can be used. For example, a blue semiconductor light emitting element mounted on the substrate 22 is converted into yellow fluorescent light. It can be configured to emit white light by covering with a body layer. Further, the LED 21 may be a system in which a plurality of SMD (Surface Mount Device) packages with connection terminals on which LED chips are mounted on a substrate 22 are mounted.

  As the substrate 22, a ceramic substrate, a glass epoxy substrate, a metal substrate, or the like can be used.

  The support 23 is formed by extrusion molding of a metal having good thermal conductivity, such as an aluminum material. The support 23 has a mounting surface 23a on which the substrate 22 is disposed on one side, a back surface 23b formed in a semi-cylindrical shape that is substantially the same shape as the inner surface of the translucent cover 10, and both side edges of the support 23. Engagement portions 23c and 23c provided along the longitudinal direction, and an attachment groove 23d provided in a groove shape in the longitudinal direction of the attachment surface 23a. Further, a through hole 23e communicating with the longitudinal direction is provided at the center of the support 23. The engaging portion 23c, the mounting groove 23d, and the through hole 23e are formed in the longitudinal direction when the support 23 is extruded.

  The substrate 22 is fixed to the mounting surface 23a of the support 23 by mounting fixing means such as screws and rivets (not shown) in the mounting groove 23d.

  As shown in FIG. 2, the light source unit 20 is accommodated in the translucent cover 10 so that the engaging portion 23c enters the engaging protrusion 10b. The position of the light source unit 20 in the translucent cover 10 is regulated by the engagement between the engagement portion 23c and the engagement protrusion 10b. Specifically, the movement of the light source unit 20 in the light emission direction and the movement in the rotation direction about the longitudinal direction of the lamp are restricted.

  The bases 30 and 40 are attached to the support 23 by fixing means (not shown). That is, the caps 30 and 40 are fixed to both ends of the light source unit 20 by fixing means such as screws and rivets. At this time, the bases 30 and 40 are fixed by attaching the fixing means to the through hole 23e from the outside of the base. In other words, both ends of the light source unit 20 are supported by the caps 30 and 40. Therefore, when the locking projection 10b is not formed on the inner surface of the translucent cover 10, the support 23 may be supported only by the caps 30 and 40 and held at a predetermined position in the translucent cover 10. .

  A non-combustible sheet 50 as a translucent sheet is disposed over the outer peripheral surface of the translucent cover 10, in this embodiment, the entire circumference. The incombustible sheet is configured to transmit at least light, and the incombustible sheet of this embodiment has incombustibility and light diffusibility.

  In addition, a flame-retardant heat-shrinkable tube 60 serving as a tube covers the translucent cover 10 from the outside of the non-combustible sheet 50 on the outermost periphery. The tube 60 is configured to be colorless and transparent, and the non-combustible sheet 50 is held on the outer peripheral surface of the translucent cover 10 by the tube 60.

  The non-combustible sheet 50 is preferably made of, for example, a glass cloth or a non-combustible material obtained by impregnating a glass cloth with a resin. In the non-combustible sheet 50 of this embodiment, the thickness of the glass cloth impregnated with silicon is 0.11 to 0.36 mm, and the total light transmittance defined in JIS K7375-2008 is 25% to 65%. Non-combustible materials that meet the standards of the new combustion regulations (Ministry of National Railways Nos. 124 and 125) of the Ministry of Land, Infrastructure, Transport and Tourism regarding vehicle interior materials issued on December 27 are used. This standard defines two types of tests (combustion test and cone calorimeter combustion heat generation test), and interior materials that have cleared both tests are certified as “non-combustible materials” based on the standard.

  Next, two types of tests of this standard will be described. The test method of the combustion test is as follows.

  A sample of B5 size (182 mm × 257 mm) is held in an inclined state of 45 °. Place the fuel container on a base made of a material having low thermal conductivity such as cork, and place the fuel container so that the center of the bottom of the fuel container is located 25.4 mm (ie, 1 inch) below the center of the sample. . In this state, add 0.5 ml of ethanol fuel to the fuel container, ignite, and leave it until the fuel is burned out.

  The combustion determination in this combustion test is performed separately during and after ethanol combustion. During combustion, the sample is observed for ignition, ignition, smoke generation, flame condition, and the like, and after combustion, after flame, residual dust, carbonization, and deformation are observed. In addition, the non-combustible level for railway vehicles in this combustion determination is divided into five stages: combustible, slow-combustible, flame-retardant, extreme flame-retardant, and non-combustible.

  Moreover, the test method of the corn calorimeter combustion exothermic test is as follows.

  Heating is performed for 10 minutes with a radiant heat of 50 kW / m 2 by a method according to ISO 5660-1: 2002.

  The sample size is a square of about 100 mm and has a thickness of up to 50 mm, and a sample having this size and a flat surface is used.

  In this test, it was confirmed that the difference between the average value of the maximum heat generation rates of the three samples and the maximum heat generation rate of each sample was less than 10%. The test of the sheet is added, and the data of the four samples excluding the maximum value and the minimum value of the maximum heat generation rate among the six samples in total are adopted for the combustion determination.

  Combustion determination in this test is performed based on the values of total calorific value (unit: MJ / m2), maximum heat generation rate (unit: kW / m2), and ignition time (unit: seconds) measured during the test time. The determination of the ignition time is considered to be ignition when a flame is present for 10 seconds or more after the flame is confirmed from the sample. In this case, the time from the start of the test until the first ignition is confirmed is referred to as the ignition time. To do. And by satisfying the standard values of non-combustibility (total heating value 8-30 kW / m2, maximum heating rate 300 kW / m2, ignition time 60 seconds or less), the cone calorimeter Judged to have passed the combustion heat test.

  The tube 60 is formed up to the entire circumference of the incombustible sheet 50 and a part of the end face of the base. Thus, the straight tube lamp 1 is hermetically sealed to ensure waterproofness. The tube 60 is preferably made of a flame retardant material having heat shrinkability and having a UL-2 standard V-2 grade or higher, for example, a fluorine tube.

  Next, a method for manufacturing a straight tube lamp will be described with reference to FIGS.

  First, a tube 60 made of a cylindrical heat shrink resin is prepared. The tube 60 is folded in two places in the longitudinal direction to form a sheet. And the incombustible sheet 50 folded in two is inserted inside the tube 60. Further, the straight tube lamp 1 is inserted inside the tube 60 and the incombustible sheet 50 which is folded in two. The non-combustible sheet 50 is slightly shorter than the total length of the straight tube lamp 1, and the tube 60 is longer than the total length of the straight tube lamp 1. Further, the inner peripheral dimension of the non-combustible sheet 50 is larger than the outer peripheral dimension of the translucent cover 10.

  FIG. 4 shows a state in which the straight tube lamp 1 is inserted into the tube 60. When the tube 60 is heated from the outside of the tube 60 at a predetermined temperature, for example, about 180 ° C. for about 1 minute, the tube 60 contracts, A tube 60 is coated on the outer peripheral surface of the straight tube lamp 1. At this time, it is comprised so that a part of end surface of a nozzle | cap | die may be coat | covered. The non-combustible sheet 50 is held together by the outer peripheral surface of the straight tube lamp 1 and the tube 60. That is, the non-combustible sheet 50 can be held on the outer peripheral surface of the straight tube lamp 1 without being bonded to the outer peripheral surface of the straight tube lamp 1 using an adhesive or the like.

  A glass cloth or a non-combustible sheet obtained by impregnating a glass cloth with a resin is difficult to be three-dimensionally processed, and costly to form three-dimensionally. On the other hand, when the non-combustible sheet is bonded to the outer peripheral surface of the straight tube lamp with an adhesive or the like, the non-combustible sheet is likely to be bent during the drying process of the adhesive. When the non-combustible sheet is bent, there arises a problem that when the lamp is turned on, it becomes a dark part and the appearance is deteriorated. On the other hand, it has been found that when the non-combustible sheet is held on the outer peripheral surface of the straight tube lamp by the tube, bending is less likely to occur. Furthermore, a non-combustible sheet and a straight tube lamp are inserted into a tube made of heat-shrinkable material. In this state, the tube is overheated and the tube is covered on the outer peripheral surface of the straight tube lamp. In one step of covering the straight tube lamp, two steps of covering the tube and holding the noncombustible sheet on the outer peripheral surface of the straight tube lamp can be performed simultaneously.

  In addition, since a non-combustible sheet is interposed between the tube and the translucent cover, the non-combustible sheet acts as a heat insulating material when the tube is heated, reducing the thermal influence on the translucent cover, A material having a relatively low heat resistance such as polycarbonate (PC) can be used for the light cover.

  Furthermore, since the non-combustible cover of this embodiment has a linear transmittance of 25% to 65% and can function as a diffusion film, the brightness of the light source module is lowered even if the translucent cover is a transparent material. It can make it difficult to feel dazzling.

  The translucent cover may be made of glass. In this case, the tube of this embodiment can function as a scattering prevention film. Further, when the translucent cover is made of glass, it is necessary to form a diffusion film or the like in order to reduce the luminance of the light source module. As means for forming a diffusion film on glass, hydrofluoric acid treatment and frost processing are conceivable, but both are expensive. In contrast, in the case of this embodiment, the sheet can function as a diffusion film, and the sheet can be easily held on the outer peripheral surface of the translucent cover in the step of covering the tube.

  In the above embodiment, the non-combustible sheet is used as the sheet. However, any sheet that is translucent can be used, and according to the present embodiment, the sheet can be easily arranged on the outer peripheral surface of the translucent cover. Can be set.

  Next, a second embodiment will be described with reference to FIG. In the second embodiment, the non-combustible sheet is provided only on the light emission side of the light source unit, and the other configurations are the same as those in the first embodiment, and thus detailed description thereof is omitted.

  In the present embodiment, the incombustible sheet 50 is formed only on the light emitting side of the light source unit 20, and the tube 60 covers the entire outer periphery of the lamp as in the first embodiment. Also in this case, the non-combustible sheet 50 can be held on the translucent cover 10 without using an adhesive or the like. Further, since the non-combustible sheet 50 is provided only on the light emitting side, the amount of non-combustible sheet used can be reduced and the luminance of the light source can be suppressed.

  Next, the illuminating device of this embodiment is demonstrated with reference to FIG. 6, FIG. FIGS. 6 and 7 show an illuminating device 11 which is an embedded illuminating device of the type for two straight tube fluorescent lamps, and the two illuminating devices 11 use two straight tube lamps 1.

  The illuminating device 11 is a long open device main body 15 that is embedded in a ceiling surface, and is disposed opposite to both ends in the longitudinal direction of the device main body 15 so that the end portions of the respective straight tube lamps 1 are respectively mounted. Two sets of sockets 16 and 17 and a lighting device 18 which is arranged in the device main body 15 and lights up the straight tube lamp 1. The socket 16 on one end to which one end of the straight tube lamp 1 is attached is a power supply side, and the socket 17 on the other end to which the other end of the straight tube lamp 1 is attached is a non-power supply side and is on the ground side. is there. Note that the socket 17 on the ground side may be used for both ground connection and attachment of the straight tube lamp 1, or only the straight tube lamp 1 may be attached.

  In the straight tube lamp 1, the direction in which the pair of power supply pins 31 are aligned and the longitudinal direction of the holding portion 41b of the ground pin 41 coincide with each other, and the surface parallel to these directions and the semiconductor light emission of the light source unit 20 The light emitting surface of the element 21 is provided in parallel. That is, the straight tube lamp 1 is provided so that light from the light emitting surface of the semiconductor light emitting element 21 of the light source unit 20 can be irradiated in a predetermined irradiation direction in a state where the straight tube lamp 1 is correctly mounted between the sockets 16 and 17.

  As shown in FIG. 6, the sockets 16 and 17 have a pair of power supply pins 31 and a ground pin 41 inserted into predetermined mounting positions from the front end surfaces of the sockets 16 and 17, and the tube axis of the straight tube lamp 1 is the center. A rotation mounting type that is mounted at a predetermined mounting position by rotating 90 ° is used.

  The lighting device 18 shown in FIG. 7 receives a commercial AC power supply, converts AC power into DC power, and converts the DC power into a pair of terminals of the socket 16 on the power supply side and a pair of power supplies of the straight tube lamp 1. The light source unit 20 is supplied through the pin 31.

  Next, when the straight tube lamp 1 is connected in the illuminating device 11 configured as described above, a pair of power feeds of the straight tube lamp 12 from the front end surfaces of the sockets 16 and 17 as shown in FIG. The straight tube lamp 1 is mounted between the sockets 16 and 17 by inserting the pin 31 and the ground pin 41 and rotating by 90 ° about the tube axis of the straight tube lamp 1.

  These embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

  1 ... straight tube lamp, 10 ... straight tube cover, 20 ... light source unit, 21 ... light source unit, 30, 40 ... base, 50 ... sheet, 60 ... tube, 11 ... lighting device, 15 ... Main unit

Claims (5)

A light source unit provided with a light source unit;
A straight tube cover that has a light-transmitting part at least in part and accommodates the light source unit so that the emitted light is emitted from the light-transmitting part;
A translucent sheet disposed on at least the outer peripheral surface of the translucent portion;
A tube covering the straight pipe cover from the outside of the sheet;
A base fixed to each end of the straight pipe cover;
A straight tube lamp characterized by comprising:   The straight tube lamp according to claim 1, wherein the tube is a flame-retardant heat-shrinkable resin.   2. The sheet according to claim 1, wherein the sheet has a total light transmittance of 25% to 65% specified in JIS K7375-2008, and is nonflammable that satisfies the standards of JNR 124 and 125. 2. The straight tube lamp according to 2.   Inserting a sheet having light diffusibility inside the tube made of tubular heat-shrinkable resin, inserting a straight tube lamp inside the tube, and then shrinking the tube at a predetermined temperature, A method of manufacturing a straight tube lamp, wherein the tube is covered with a straight tube cover of a straight tube lamp from the outside of the sheet so that the sheet is held on the outer peripheral surface of the straight tube lamp. The device body;
A straight tube lamp of claim 1 or 2 attached to the apparatus body;
An illumination device comprising:

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