JP5558526B2 - Straight tube lamp - Google Patents

Description

  The present invention relates to a straight tube lamp, and more particularly to a straight tube lamp using a solid light emitting element as a light source.

  In recent years, solid state light emitting devices such as semiconductor lasers and light emitting diodes have attracted attention as new light sources that can replace incandescent bulbs and fluorescent lamps as environmental awareness increases. In particular, light-emitting diodes (hereinafter referred to as LEDs) have a long life and high light conversion efficiency, and LED lamps using LEDs as light sources are attracting attention.

  For example, Patent Document 1 discloses a straight tube lamp using an LED as a light source. In this straight tube lamp, a long rectangular substrate on which a plurality of LEDs are mounted is disposed on a thin and long heat radiating member extending along the longitudinal direction of the substrate, and is accommodated in a cylindrical case together with the heat radiating member. Become. The heat dissipating member is a member for releasing heat generated in the LED during lighting. The life of the LED can be extended by providing the heat dissipating member to release the heat of the LED. And in the said structure, in order to perform relative positioning of the board | substrate with respect to a case more correctly, the thermal radiation member is made to contact | abut to the inner surface of a case.

JP 2010-123359 A (released on June 3, 2010)

  However, the straight tube lamp of Patent Document 1 has a problem of warping. This is because the case is heated by the heat generated by the LED, but at this time, the temperature on one side in the circumferential direction of the case rises as compared with the other side, resulting in a difference in the degree of thermal expansion.

  The case is usually formed from a synthetic resin such as polycarbonate. Synthetic resin has the advantage that it is less likely to break compared to glass or the like, but is a material that is easily thermally expanded. In the straight tube lamp of Patent Document 1, since the heat radiating member is accommodated in the case, the heat of the heat radiating member is less likely to be discharged compared to the configuration in which the heat radiating member is exposed to the outside of the case. . Therefore, the temperature on one side in the circumferential direction where the heat dissipating member is arranged in the case is higher than the temperature on the other side where the heat dissipating member is not arranged, and one side is greatly expanded in comparison with the other side, Warping will occur. And in the straight tube | pipe type lamp of patent document 1, the heat radiating member is made to contact | abut to the inner surface of a case. For this reason, the thermal expansion on one side of the case where the heat dissipating member is disposed becomes remarkable, and a relatively large warp is generated.

  The warp generated in the straight tube lamp is restored by turning off the LED and lowering the temperature of the case. However, if such warping and restoration are repeated, there is a risk of falling from the lighting fixture to which the straight tube lamp is attached. That is, when a straight tube lamp is attached to a conventional fluorescent lamp luminaire, the caps at both ends in the longitudinal direction of the straight tube lamp are attached to sockets of the fluorescent lamp luminaire. Two terminals protrude from the base, and the terminals are attached by fitting the terminals into sockets. If warping and restoration are repeated, the degree of fitting between the terminal and the insertion port gradually becomes sweet, and the straight tube lamp will fall in the worst case.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a straight tube lamp that is less likely to warp.

In order to solve the above problems, a straight tube lamp of the present invention includes a plurality of solid state light emitting devices, a heat conducting member that conducts heat from the solid state light emitting device, the solid state light emitting device and the heat conducting member. A straight tube lamp including a case for housing, wherein a heat insulating member is provided between the heat conducting member and the case, and the heat conducting member has a cross section in a direction perpendicular to the longitudinal direction of the case. shape, to name a hat made from both sides of the flange portion of the shaped part and the shaped part of該Ko co, substrate to the bottom the solid light emitting element is mounted in recesses of the shaped portion of the co-attachment The heat insulating member is provided so as to form an air layer between the heat insulating member and the heat conducting member and / or between the heat insulating member and the case .

According to the said structure, since the heat insulation member is provided between the heat conductive member and the case, the heat from a heat conductive member becomes difficult to be transmitted to a case. Thereby, even if the heat conducting member is housed in the case, the temperature on the back side (opposite to the light irradiation side) where the heat conducting member is arranged in the case is difficult to rise, and the back side and light It is possible to suppress the occurrence of warpage due to the difference in the degree of thermal expansion from the irradiation side. Hereinafter, the warp due to the difference in the degree of thermal expansion between the back side and the light irradiation side is referred to as warp due to thermal expansion.
Furthermore, the heat conduction member is made into a hat shape, and a light emitting device with a low color temperature emitted from the oblique direction of the solid light emitting device is attached by attaching a substrate on which the solid light emitting device is mounted at the bottom of the hollow of the hat-shaped U-shaped portion. Can be blocked by the U-shaped portion, and the color of the irradiation light of the straight tube lamp can be made uniform.

In addition, since the air layer formed between the heat insulating member and the heat conducting member and / or between the heat insulating member and the case functions as a heat insulating layer, in the above configuration, the heat insulating layer of the heat insulating member itself. In addition to the function as described above, a heat insulating effect by the air layer is also created, and a large heat insulating effect can be obtained while reducing the weight as the heat insulating member.

  In the straight tube lamp of the present invention, the heat conducting member is held by the heat insulating member, and the heat conducting member and the case may be non-contact.

  By making the heat conductive member and the case non-contact, heat transfer from the heat conductive member to the case can be effectively suppressed, and the occurrence of warpage due to the above-described thermal expansion can be more effectively suppressed. it can.

  In the straight tube lamp of the present invention, the heat insulating member is formed on the inner surface of the case so as to form a pair in a plane parallel to the central axis of the case, or the central axis of the case. It is preferable that the projecting pieces formed so as to make a pair toward the surface are restricted from moving in the circumferential direction along the inner surface of the case and are locked to the case.

  By reducing the contact portion between the heat insulating member holding the heat conducting member and the inner surface of the case as much as possible, heat transfer from the heat insulating member to the case can also be reduced. In the above configuration, the heat insulating member is locked by the protruding piece formed on the inner surface of the case, and movement in the circumferential direction along the inner surface of the case is restricted, so that heat transfer from the heat insulating member to the case can be reduced, In addition, since the heat conducting member and the heat insulating member can be easily assembled to the case, they can be easily manufactured. In addition, it can be easily disassembled during recycling.

According to the present invention , it is possible to suppress warping due to thermal expansion of the case , and to make the color of the irradiation light of the straight tube lamp uniform.

The straight tube | pipe type lamp which concerns on one Embodiment of this invention is shown, and is sectional drawing along the longitudinal direction (along the AA line of FIG. 2). It is a perspective view which shows the external appearance of the straight tube | pipe type lamp of the said embodiment. The straight tube | pipe type lamp of the said embodiment is shown, and is sectional drawing which follows the BB line of FIG. The straight tube | pipe type lamp of the said embodiment is shown, and is sectional drawing which follows the CC line of FIG. The principal part of the straight tube | pipe type lamp of the said embodiment is shown, and it is a disassembled perspective view of the principal part of a straight tube | pipe type lamp. It is explanatory drawing which shows the irradiation area | region (irradiation range) in the straight tube | pipe lamp of the said embodiment. The modification in the straight tube | pipe lamp of the said embodiment is shown, and is explanatory drawing which shows the cross-sectional shape of the case of uneven thickness.・ The straight tube | pipe type lamp which concerns on other embodiment of this invention is shown, and it is a step surface figure which synthesize | combines and shows the cross section of a center part and an edge part along the direction perpendicular | vertical to a longitudinal direction. It is sectional drawing which shows the cross-sectional shape along the direction perpendicular | vertical to the longitudinal direction of the heat insulation member in the straight tube | pipe type lamp which concerns on the said other embodiment. The straight tube | pipe type lamp which concerns on other embodiment of this invention is shown, and is a perspective view which shows the cross-section of the one end part of a longitudinal direction.

[Embodiment 1]
Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

  1 to 6 show a straight tube lamp 100 according to this embodiment of the present invention. 2 is a perspective view showing the appearance of the straight tube lamp 100, and FIG. 1 is a sectional view taken along the line AA of FIG. 3 is a cross-sectional view taken along line BB in FIG. 1, and FIG. 4 is a cross-sectional view taken along line CC in FIG. FIG. 5 is an exploded perspective view of the main part of the straight tube lamp 100.

  As shown in FIG. 1, the straight tube lamp 100 of this embodiment includes a case 6, an LED substrate 1, a plurality of LEDs 2, a heat radiating member 3, a heat insulating member 4, a connector portion 5, and a pair of joints. It has parts 7 and 9 and a pair of bases 8 and 8.

  As shown in FIGS. 1, 2, and 3, the case 6 is a straight tubular cylinder having a circular cross section, and accommodates the LED substrate 1, the heat radiating member 3, and the heat insulating member 4 therein. . Case 6 is formed from a synthetic resin having translucency such as polycarbonate. Note that the case 6 is not limited to a straight tubular cylinder having a circular cross section, and may have an elliptical cross section.

  The LED substrate 1 is made of, for example, a glass epoxy resin. As shown in FIG. 5, the LED substrate 1 is formed in a long rectangular shape, and a plurality of LEDs 2 are mounted on the first surface 1a. Further, although not shown, wiring is formed on the LED substrate 1.

  The plurality of LEDs 2 are light sources of the straight tube lamp 100. The plurality of LEDs 2 are arranged so as to be arranged at predetermined intervals along the longitudinal direction of the LED substrate 1. These LEDs 2 are connected by wiring (not shown). In the present embodiment, a predetermined number of LEDs 2 are connected in series to form a set, and each set is connected in parallel to each other. As the LED 2, for example, a white LED configured in a surface mount package type is preferably used.

  The heat radiating member 3 is a member for releasing the heat generated in the LED 2, in other words, a member for releasing the heat of the LED substrate 1, and is an elongated member extending along the longitudinal direction of the LED substrate 1. As the material of the heat radiating member 3, aluminum which is excellent in thermal conductivity and light in weight is exclusively used. The LED substrate 1 is attached to the heat dissipation member 3 such that the second surface 1b opposite to the first surface 1a on which the LEDs 2 are mounted is laminated on the heat dissipation member 3. This attachment is performed by a technique (not shown) such as screwing or riveting, for example.

  As shown in FIG. 3, in this embodiment, the heat radiating member 3 has a U-shaped portion 3a and a flange portion extending in both sides of the U-shaped portion 3a. It is formed in a hat shape composed of 3b and 3b. And the said LED board 1 is attached to the bottom part of the hollow of the said U-shaped part 3a.

  The shape of the heat radiating member 3 is such a cross-sectional hat shape, and the LED substrate 1 is housed in the U-shaped portion 3a to shield light with a low color temperature (yellowish light) emitted from the oblique direction of the LED 2. Thus, the color of the irradiation light of the straight tube lamp 100 can be made uniform.

  This will be described in more detail. In the light emitted from the LED 2, light close to the emission center, which is also the normal direction of the LED substrate 1, is white light having a high color temperature, but light irradiated in an oblique direction farthest from the emission center is Low yellowish light. When such light is irradiated through the case 6, there is a problem that part of the irradiation light from the straight tube lamp 100 becomes yellowish.

  On the other hand, as shown in FIG. 6, the heat radiation member 3 has a cross-sectional hat shape, and the LED substrate 1 is attached to the U-shaped portion 3a, so that light with a low color temperature emitted from the oblique direction of the LED 2 can be obtained. By shielding with the side wall of the U-shaped portion 3a, it is possible to reduce light having a low color temperature irradiated through the case 6. In the present embodiment, the heat radiating member 3 is designed to have an angle range of a little over 120 degrees across the emission center where white light is guaranteed as the emission light from the LED 2.

  Further, by forming the heat radiating member 3 in such a cross-sectional hat shape and having a bent portion, it is possible to increase the strength of the heat radiating member as compared with a flat plate heat radiating member having the same thickness and no bent portion. As a result, the rigidity of the straight tube lamp 100 can be increased.

  That is, the heat radiating member 3 is a member that is disposed over almost the entire length of the case 6 along the longitudinal direction of the case 6 as shown in FIG. Therefore, the heat radiating member 3 also functions as a structural material for the straight tube lamp 100. By increasing the strength of the heat dissipating member 3 that also functions as a structural material, the rigidity of the straight tube lamp 100 itself can be increased.

  In FIG. 5, the single LED substrate 1 is shown as having a length corresponding to the longitudinal dimension of the straight tube lamp 100. It may be divided into a plurality of sheets. In the case where the LED substrate 1 is divided into a plurality of pieces, the divided substrate may be electrically connected in a state where the divided substrate is attached to the heat dissipation member 3.

  As shown in FIGS. 1, 3, and 5, the heat insulating member 4 is disposed between the heat radiating member 3 and the case 6 and suppresses heat transfer from the heat radiating member 3 to the case 6 (preferably cut off). It is a member for doing.

  As described above, since the case 6 is formed of a synthetic resin that is easily thermally expanded, such as polycarbonate, the temperature of one side in the circumferential direction of the case 6 where the heat dissipating member 3 is disposed is higher than that of the other side. When it becomes higher, a difference occurs in the degree of thermal expansion, and warping occurs. The warp of the case 6 becomes the warp of the straight tube lamp 100.

  By providing the heat insulating member 4, the heat of the heat radiating member 3 is suppressed (preferably blocked) from being transmitted to the case 6, and the side where the heat radiating member 3 is disposed in the case 6 is more thermally expanded than the other side. Invitation of a situation such as case 6 warping can be effectively avoided.

  As the material of the heat insulating member 4, it is possible to select a material having no rigidity per se. However, a material having rigidity is preferably used as the material of the heat insulating member 4. Further, considering the heat insulating effect, it is most preferable that the heat insulating member 4 is disposed over almost the entire length of the case 6 along the longitudinal direction of the case 6 similarly to the heat radiating member 3. Therefore, by disposing the rigid heat insulating member 4 over almost the entire length of the case 6 along the longitudinal direction, it can function as a structural material of the straight tube lamp 100 as with the heat radiating member 3.

  Since the heat insulating member 4 also functions as a structural material, the rigidity of the straight tube lamp 100 itself can be increased. In addition, even if the case 6 is thermally expanded due to the fact that the case 6 is provided with a member having such rigidity on the side of the case 6 that causes thermal expansion that causes warping, the case 6 may be warped. The amount of warpage can be reduced by the rigidity of the heat insulating member 4.

  Examples of the material of the heat insulating member 4 having rigidity include the same synthetic resin as polycarbonate, such as the case 6. However, unlike the case 6, since the heat insulating member 4 does not need to have translucency, any material having high heat insulating property, light weight and necessary rigidity may be used.

  Here, the shape of the heat insulating member 4 and the attachment of the heat insulating member 4, the heat radiating member 3, and the case 6 in the straight tube lamp 100 of the present embodiment will be described in detail with reference to FIGS. 1, 3, and 5. .

  As shown in FIG. 5, the heat insulating member 4 is an elongated member that extends along the longitudinal direction of the LED substrate 1, similarly to the heat radiating member 3. In the present embodiment, the heat insulating member 4 is a molded member obtained by bending a thin and long resin plate, and a cross-sectional shape cut in a direction perpendicular to the longitudinal direction is along the inner periphery (inner surface) of the case 6. It consists of a curved portion 4b and S-shaped portions 4a and 4a that are curved in an S-shape on both sides of the curved portion 4b. Such a heat insulating member 4 is formed by extruding synthetic resin such as polycarbonate.

  As shown in FIG. 3, the curved portion 4 b in the heat insulating member 4 is arranged so as to partition between the heat radiating member 3 and the case 6, and thereby, between the curved portion 4 b and the heat radiating member 3, and the curved portion 4 b. The air layers 20 and 21 are formed between the case 6 and the case 6. These air layers 20 and 21 also function as a heat insulating layer. That is, in the configuration of the heat insulating member 4 of the present embodiment, while the heat insulating member 4 itself functions as a heat insulating layer, the air layers 20 and 21 that function as a heat insulating layer are created to reduce the weight of the heat insulating member 4, It has a structure that draws out a large heat insulation effect. In addition, although the structure in which the two air layers 20 and 21 are formed is illustrated here, the air layer is at least either between the curved portion 4b and the heat radiating member 3 or between the curved portion 4b and the case 6. The structure currently formed in one side may be sufficient.

  In the present embodiment, the portion of the heat insulating member 4 that partitions the heat radiating member 3 and the case 6 is a curved portion 4 b along the inner periphery of the case 6. As a result, the case 6 becomes like a double structure at the portion where the curved portion 4b is disposed, so that the strength for preventing the warp of the case 6 is increased and the warp of the case due to thermal expansion is further increased. It can be effectively suppressed.

  Further, by arranging the U-shaped part 3a so as to protrude toward the curved part 4b side along the inner periphery of the case 6, the curved part 4b which is a curved surface and the bottom part of the U-shaped part 3a which is a flat surface The air layer 20 can be reliably formed between the LED 2 and the LED 2 is disposed at the bottom of the U-shaped portion 3a, so that the light from the LED 2 is sufficiently diffused by the case 6 to emit light uniformly. Therefore, the distance between the LED 2 and the case 6 can be ensured.

  In addition, the shape of the part which partitions off between the thermal radiation member 3 and case 6 in the heat insulation member 4 is not restricted to this, For example, it is good also considering the top part of the curved part 4b as a flat part. According to this, the air layer formed between the heat insulating member and the case 6 can be enlarged. However, the configuration of the case 6 having a double structure with the shape of the portion separating the heat radiating member 3 and the case 6 as a curved portion 4b along the inner periphery of the case 6 The strength for prevention can be increased most.

  On the other hand, although it is the S-shaped part 4a, as shown in FIG. 3, the S-shaped part 4a consists of the holding | maintenance part 4a-1 and the latching | locking part 4a-2 in detail. The locking portion 4a-2 is continuous with the bending portion 4b, and is bent in a U shape so as to protrude toward the central axis of the bending portion 4b (the central axis of the case 6 when accommodated in the case 6). It becomes. On the other hand, the holding portion 4a-1 is continuous with the locking portion 4a-2 and is bent at both ends along the longitudinal direction of the heat insulating member 4 inward toward the central axis of the bending portion 4b. It is bent in a U shape so as to protrude in a direction away from the central axis of 4b.

  The locking part 4a-2 is a state in which the heat insulating member 4 is accommodated in the case 6, and the movement of the heat insulating member 4 in the circumferential direction along the inner surface (inner periphery) of the case 6 is restricted. Is locked to the case 6. On the inner surface of the case 6, ribs (projecting pieces) 6 a and 6 a formed so as to make a pair toward the central axis of the case 6 are provided. As the ribs 6a and 6a engage with the locking portions 4a-2 and 4a-2, the heat insulating member 4 is locked to the case 6, and movement in the circumferential direction along the inner surface of the case 6 is restricted. The

  In order to minimize the transfer of heat to the case 6, it is preferable to avoid contact between the heat insulating member 4 and the case 6 as much as possible. In the present embodiment, the contact (contact) of the heat insulating member 4 with the case 6 is only the contact between the locking portions 4a-2 and 4a-2 and the ribs 6a and 6a.

  The ribs 6a and 6a may be formed to form a pair in a plane parallel to the central axis of the case 6. Further, the interval between the U-shaped portions in the locking portion 4a-2 is formed slightly smaller than the thickness of the ribs 6a and 6a to function as a leaf spring, and the ribs 6a and 6a are sandwiched between the locking portions 4a-2. It can also be configured.

  The holding portion 4a-1 carries the heat radiating member 3. Both ends of the heat radiating member 3 extending along the longitudinal direction of the case 6 are held at both ends of the heat insulating member 4 extending along the longitudinal direction. Specifically, the heat radiating member 3 is in contact with the case 6 by supporting the flange portions 3b and 3b at both ends extending along the longitudinal direction by the holding portions 4a-1 and 4a-1 of the heat insulating member 4. It is accommodated in the case 6 without doing. The size of the U-shaped portion of the holding portion 4a-1 is slightly smaller than the thickness of the flange portions 3b and 3b so as to function as a leaf spring, and the flange portions 3b and 3b are formed by the holding portions 4a-1 and 4a-1. The structure which pinches | interposes is preferable.

  By setting it as such a structure, the heat radiating member 3 and the heat insulation member 4 can be handled as one member. That is, what attached the heat radiating member 3 to the heat insulating member 4 is positioned inside the case 6 by aligning the ribs 6a and 6a formed on the inner surface of the case 6 with the locking portions 4a-2 and 4a-2. By inserting, the heat radiating member 3 and the heat insulating member 4 can be simultaneously installed in the case 6.

  And also in the heat insulation member 4, the intensity | strength of the heat insulation member 4 is raised rather than the heat insulation member of the same thickness which does not have a bending part by forming the S-shaped part 4a as mentioned above and giving a bending part. Can do. As a result, the apparent strength of the case 6 can be increased, and the rigidity of the straight tube lamp 100 can be increased.

  In addition, as described above, it is most preferable that the heat insulating member 4 is disposed over almost the entire length of the case 6 along the longitudinal direction of the case 6. However, in order to clear the problem of the total weight required for the straight tube lamp 100, there are cases where it can only be partially arranged. In such a case, it is preferable to arrange the case 6 at the center in the longitudinal direction where the force that generates the most curvature is most likely to concentrate.

  The joint portions 7 and 9 are end members attached to both ends in the longitudinal direction of the case 6 (direction parallel to the central axis of the case). The joint portions 7 and 9 are attached to both ends in the longitudinal direction of the case 6 in which the LED substrate 1, the heat radiating member 3, and the heat insulating member 4 are accommodated. In the joint portions 7 and 9, circular grooves 7a and 9a corresponding to the shape of the end face in the longitudinal direction of the case 6 are formed. The joint portions 7 and 9 are attached to the end portions of the case 6 by fitting the end portions in the longitudinal direction of the case 6 into the circular grooves 7a and 9a.

  The heat insulating member 4 to which the heat radiating member 3 is attached is restricted from moving in the longitudinal direction of the case 6 with respect to the case 6 by the joint portions 7 and 9.

  Specifically, as shown in FIGS. 1 and 4, the horizontal end surface 7 b provided in the joint portion 7 comes into contact with the holding portions 4 a-1 and 4 a-1 of the heat insulating member 4, and the longitudinal direction of the heat insulating member 4. Hold one end. Further, the vertical end surface 7 c provided in the joint portion 7 abuts against the end portions in the longitudinal direction of the heat insulating member 4 and the heat radiating member 3.

  Although not shown in FIG. 1, the joint portion 9 also comes into contact with the holding portions 4 a-1 and 4 a-1 of the heat insulating member 4 and holds one end portion in the longitudinal direction of the heat insulating member 4; The heat insulation member 4 and the part which contact | abuts so that it may contact | abut with the one end part of the longitudinal direction of the heat radiating member 3 are provided.

  Both ends in the longitudinal direction of the heat insulating member 4 and the heat radiating member 3 are formed by a horizontal end surface 7b and a vertical end surface 7c provided in the joint portion 7, and the holding portion and the abutting portion provided in the joint portion 9, respectively. The movement in the longitudinal direction of 6 is restricted, positioned and held.

  In the configuration in which the heat radiating member 3 is held by the heat insulating member 4 and fixed so as not to move with respect to the heat insulating member 4, both ends in the longitudinal direction of the heat insulating member 4 are connected to the length of the case 6 at the joint portion. The movement in the direction may be restricted, positioned, and held.

  The details of the configuration in which both end portions in the longitudinal direction of the heat insulating member 4 and the heat radiating member 3 are positioned and held by the joint portion which is an end member will be described later in Embodiment 3.

  As shown in FIG. 1, the connector portion 5 is attached to the inside of one joint portion 9 on the power feeding side. The connector part 5 and the LED board 1 are electrically connected. The joint portion 9 is formed with an opening 10 for enabling connection between the connector portion 5 and a power source provided in the lighting fixture by wiring.

  The bases 8 and 8 are attached to the joint portions 7 and 9. Each of the caps 8 and 8 is provided with two terminals 8a protruding from each other. Since the straight tube lamp 100 of the present embodiment feeds power to the LED substrate 1 using the connector portion 5, these terminals 8a and 8a are not used for feeding but are used as attachment members to a lighting fixture.

  In addition, the structure of the joint parts 7 and 9 is not restricted to this, It is good also as a structure which can be used instead of a straight tube | pipe type fluorescent lamp for the conventional fluorescent lighting fixture, without providing the connector part 5. FIG. In other words, by connecting the terminals 8a and 8a formed on the caps 8 and 8 to the socket of the fluorescent lamp lighting fixture, the straight tube lamp is mechanically attached to the lighting fixture and electrically connected. Also good. In addition, it can be applied to a type in which a power source is mounted inside a straight tube lamp.

  As described above, in the straight tube lamp of the present embodiment, a heat insulating member for suppressing (preferably blocking) heat transfer from the heat radiating member 3 to the case 6 between the case 6 and the heat radiating member 3. 4 is provided.

  Thereby, it is suppressed (preferably blocked) that the heat of the heat radiating member 3 is transmitted to the case 6, and one side in the circumferential direction of the case 6 in which the heat radiating member 3 is arranged expands greatly compared to the other side. It is possible to effectively suppress the occurrence of warpage in the case 6, and to realize the straight tube lamp 100 that is less likely to warp even if the heat dissipation member 3 is housed in the case 6.

  Note that, as a more desirable configuration, a case 6A having an uneven thickness in which the thickness on the light irradiation side is made thinner as shown in FIG. For example, the thickness on the light irradiation side is 1.0 mm, and the thickness on the back side is 1.5 mm. According to this, by reducing the wall thickness on the light irradiation side, the light on the back side has a higher rate of thermal expansion compared to the light irradiation side, while increasing the light utilization efficiency by irradiating more light. By increasing the thickness, it is possible to increase the strength and prevent warping due to thermal expansion. Further, when the thickness on the light irradiation side is reduced without changing the thickness on the back side, the light use efficiency can be increased and the weight can be reduced.

  Therefore, by providing the straight-walled lamp 100 of this embodiment with the uneven thickness case 6A having such an effect in place of the case 6, the occurrence of warpage can be more effectively suppressed. .

  In addition, as described above, in order to clear the problem of the total weight necessary for the straight tube lamp 100, such a case 6A having an uneven thickness is also employed when the heat insulating member 4 can be disposed only partially. Since the case can be reduced in weight, it may be possible to dispose the heat insulating member 4 in the entire longitudinal direction of the heat radiating member 3, which is a very effective combination.

[Embodiment 2]
Hereinafter, other embodiments of the present invention will be described in detail with reference to the drawings. For convenience of explanation, members having the same functions as those used in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

  FIG. 8 is a cross-sectional view of a straight tube lamp 100A according to another embodiment of the present invention. FIG. 8 is a cross-sectional view of the central portion of the straight tube lamp 100A provided with the LED 2 and a cross-sectional view of the joint portion 7 of the straight tube lamp 100A corresponding to FIGS. 3 and 4 of the first embodiment. Is synthesized and described.

  The main difference between the straight tube lamp 100 of the first embodiment and the straight tube lamp 100A of the present embodiment is the shape of the heat insulating member. As shown in FIG. 9, the heat insulating member 4 </ b> A of the straight tube lamp 100 </ b> A of the present embodiment is an elongated member having a semicircular sectional shape in the longitudinal direction.

  As shown in FIGS. 8 and 9, the heat insulating member 4 </ b> A is a molded member obtained by bending a thin and long resin plate. The cross-sectional shape of the heat insulating member 4A cut in the direction perpendicular to the longitudinal direction is an arc portion 4A-1 along the inner periphery (inner surface) of the case 6B, and both ends of the arc portion 4A-1 are arc portions 4A-1. The locking portions 4A-2 and 4A-2 that are horizontally bent toward the central axis, and the holding portions 4A in which the tips of the locking portions 4A-2 and 4A-2 are further bent toward the arc portion 4A-1. -3, 4A-3, holding portions 4A-5 and 4A-5 provided so as to hang down from the inner surface of the arc portion 4A-1, and locking portions 4A-2 and 4A from the inner surface of the arc portion 4A-1. -2 is provided in parallel with the holding portions 4A-6 and 4A-6, and a guide wall 4A-4 provided so as to hang down from the inner surface of the arc portion 4A-1. Such a heat insulating member 4A is formed by extruding a synthetic resin such as polycarbonate.

  As shown in FIG. 8, the arc portion 4A-1 in the heat insulating member 4A is arranged so as to partition between the heat radiating member 3 and the case 6B, and between the arc portion 4A-1 and the heat radiating member 3 and a curved portion. Air layers 20 and 21 functioning as a heat insulating layer are formed between 4b and the case 6B. However, in the present embodiment, the arc portion 4A-1 is disposed close to the inner surface of the case 6B, and thus the air layer 20 is thinner than that in the first embodiment. In addition, although the structure in which the two air layers 20 and 21 are formed is illustrated here, the air layer is between the arc portion 4A-1 and the heat radiating member 3 or between the curved portion 4b and the case 6B. The structure formed in at least any one may be sufficient.

  As shown in FIG. 8, the heat dissipating member 3 holds the flange portions 3b and 3b by a pair of holding portions 4A-3, 4A-50, and 4A-6 in the heat insulating member 4A. That is, also in this case, in the heat radiating member 3, both end portions extending along the longitudinal direction of the case 6B are held at both end portions extending along the longitudinal direction of the heat insulating member 4A.

  The guide wall 4A-4 guides the U-shaped portion 3a of the heat radiating member 3. The heat dissipating member 3 is positioned so that the flanges 3b and 3b are located in the space where the three holding portions 4A-3, 4A-5, and 4A-6 face each other from the end in the longitudinal direction of the heat insulating member 4A. The guide wall 4A-4 functions as a guide at the time of insertion.

  Further, the holding portions 4A-3, 4A-5, 4A-6 and the guide wall 4A-4 are arranged with respect to the spacer and the heat radiating member 3 positioned between the heat radiating member 3 and the heat insulating member 4A in order to form the air layer 20. It also functions as a positioning part that determines the holding position of the heat insulating member 4A. Thereby, it is possible to reliably form the air layer 20 and stably hold the heat radiating member 3 on the heat insulating member 4A.

  The heat insulating member 4A to which the heat radiating member 3 is attached is inserted into the case 6B by aligning the ribs 6Ba and 6Ba formed on the inner surface of the case 6B with the locking portions 4A-2 and 4A-2. By doing so, it is attached to the case 6B.

  Also in the heat insulating member 4B, the locking portions 4A-2 and 4A-2, the holding portions 4A-5 and 4A-5, the holding portions 4A-6 and 4A-6, and the guide wall 4A-4 are provided as described above. Thereby, the intensity | strength of 4 A of heat insulation members can be raised rather than the heat insulation member of the same thickness which does not have a bending part. Thereby, the intensity | strength for preventing curvature of case 6B can also be raised, and the rigidity of 100 A of straight tube | pipe lamps can be improved.

[Embodiment 3]
Hereinafter, still another embodiment of the present invention will be specifically described with reference to the drawings. For convenience of explanation, members having the same functions as those used in the first and second embodiments are given the same reference numerals and explanation thereof is omitted.

  FIG. 10 is a perspective view showing a cross-sectional structure of one end portion in the longitudinal direction of a straight tube lamp 100B according to another embodiment of the present invention. The joint portion 30 attached to one end portion in the longitudinal direction of the case 6 </ b> C includes a main body portion 31 and a connector case 32 fitted to the main body portion 31. The connector case 32 is a member that holds the above-described connector for supplying power, and functions as a part of the joint portion 30 by being fitted to the main body portion 31. The connector case 32 is formed with an opening 10 through which wiring for connecting a connector held inside and a power source arranged on the lighting fixture side is passed. In the present embodiment, the main body 31 and the connector case 32 made of a different member are provided to hold the connector. However, the main body 31 and the connector case 32 may be integrated. .

  Further, the joint portion 30 is attached to the case 6 </ b> C by fitting the end portion in the longitudinal direction of the case 6 </ b> C into a circular groove 31 a formed in the main body portion 31. The end in the longitudinal direction of the case 6C is partially cut away in the circumferential direction according to the shape of the portion of the main body 31 where the connector case 32 is fitted.

  In the present embodiment, the heat insulating member 4B has a cross-sectional shape cut in a direction perpendicular to the longitudinal direction, the curved portion 4Bb along the inner periphery (inner surface) of the case 6C, and “5” on both sides of the curved portion 4Bb. It consists of 5 character-shaped parts 4Ba and 4Ba bent into a character shape. Such a heat insulating member 4B is also formed by extruding synthetic resin such as polycarbonate.

  The curved portion 4Bb of the heat insulating member 4B has a function similar to that of the curved portion 4b of the heat insulating member 4 of the first embodiment, and the 5-shaped portion 4Ba of the heat insulating member 4B is also an S-shaped portion of the heat insulating member 4. It has the same function as 4a. That is, the holding part 4Ba-1 and the locking part 4Ba-2 of the 5-shaped part 4Ba correspond to the holding part 4a-1 and the locking part 4a-2 of the S-shaped part 4a, and the holding parts 4Ba on both sides. -1 · 4Ba-1 holds the flange portion 3b of the heat radiating member 3, and the engaging portions 4Ba-2 and 4Ba-2 on both sides engage with the ribs 6Ca and 6Ca formed on the case 6C.

  Thereby, the heat insulation member 4B and the heat radiating member 3 held by the heat insulation member 4B are restricted from moving in the circumferential direction along the inner surface of the case 6C. As described above, the case 6C is notched at the portion where the connector case 32 is fitted, and therefore the rib 32a serving as a substitute for the rib 6Ca formed at the notched portion of the connector case 32 is provided. Is formed. The locking portion 4Ba-2 of the heat insulating member 4B engages with the rib 32a at the portion of the joint portion 30 where the connector case 32 is fitted.

  The heat insulating member 4B and the heat radiating member 3 held by the heat insulating member 4B are held and positioned by support portions 31b, 31b, 31c and 31d, a tension portion 31e, and a contact portion 32b formed in the joint portion 30. The movement of the case 6C in the longitudinal direction is restricted.

  Specifically, the support portions 31b and 31b formed on the main body portion 31 of the joint portion 30 are connected to the holding portions 4Ba-1 on both sides of the heat insulating member 4B and the bottom side of the U-shaped portion 3a of the heat radiating member 3. Abut from the opposite side. Further, the support portions 31c and 31d formed on the main body 31 are opposite to the curved portion 4Bb in the heat insulating member 4B and the U-shaped portion 3a in the heat radiating member 3 on the side opposite to the bottom side of the U-shaped portion 3a. Abut more. And the tension part 31e formed in the main-body part 31 is between the curved part 4Bb in the heat insulation member 4B, and the U-shaped part 3a in the heat radiating member 3 so that the space between them is expanded and the heat insulation member 4B. Tension with the heat radiating member 3 is applied. Furthermore, the contact part 32b provided in the connector case 32 of the joint part 30 contact | abuts so that it may contact | abut one end part of the longitudinal direction of the heat insulation member 4B. The contact portion 32b has a flat contact surface in a direction orthogonal to the central axis of the case 6C.

  And although not shown in figure, it is the same structure as the support part 31b * 31b * 31c * 31d in the joint part 30, the tension part 31e, and the contact part 32b also at the other end part of the longitudinal direction of the straight tube | pipe 100B. The joint part which differs only in the point which does not mount the member regarding a connector part is provided, and heat insulation is carried out by pinching | interposing the case 6C in which the heat insulation member 4B and the heat radiating member 3 were accommodated in these two joint parts. Both ends of the member 4 and the heat radiating member 3 in the longitudinal direction are positioned and held.

  In the configuration in which the heat radiating member 3 is held by the heat insulating member 4B and fixed so as not to move with respect to the heat insulating member 4B, both end portions in the longitudinal direction of the heat insulating member 4B are positioned and held at the joint portion. Just do it.

  In order to solve the above problems, a straight tube lamp of the present invention contains a substrate on which a plurality of solid state light emitting devices are mounted, a heat radiating member that radiates heat from the substrate, and the substrate and the heat radiating member. A straight tube lamp including a cylindrical case, and a heat insulating member is provided between the heat radiating member and the case.

  According to the said structure, since the heat insulation member is provided between the heat radiating member and the case, the heat from a heat radiating member becomes difficult to be transmitted to a case. Thereby, even if it is the structure which accommodated the heat radiating member in the case, it becomes difficult to raise the temperature of the back side (opposite side of the light irradiation side) where the heat radiating member is arranged in the case, and the back side and the light irradiation side It is possible to suppress the occurrence of warping due to the difference in the degree of thermal expansion. Hereinafter, the warp due to the difference in the degree of thermal expansion between the back side and the light irradiation side is referred to as warp due to thermal expansion.

  In the straight tube lamp of the present invention, it is preferable that the heat dissipating member is held by the heat insulating member, and the heat dissipating member and the case are not in contact with each other.

  By making the heat radiating member and the case non-contact, heat transfer from the heat radiating member to the case can be effectively suppressed, and the occurrence of warpage due to the thermal expansion described above can be more effectively suppressed.

  For example, the heat dissipation member can be simply configured by holding both end portions extending along the longitudinal direction of the case at both end portions extending along the longitudinal direction of the heat insulating member. Can be realized.

  In the straight tube lamp of the present invention, the heat insulating member further includes a portion arranged to partition the heat radiating member and the case, and between the heat insulating member and the heat radiating member and / or Alternatively, an air layer may be formed between the heat insulating member and the case.

  Since the air layer formed between the heat insulating member and the heat radiating member and / or between the heat insulating member and the case functions as a heat insulating layer, in the above configuration, the heat insulating member itself functions as a heat insulating layer. In addition, a heat insulating effect by the air layer is also created, and a large heat insulating effect can be obtained while reducing the weight as the heat insulating member.

  In the straight tube lamp of the present invention, the heat insulating member is formed on the inner surface of the case so as to form a pair in a plane parallel to the central axis of the case or the case. It is preferable that the projecting pieces formed so as to form a pair toward the central axis are configured to be restricted from movement in the circumferential direction along the inner surface of the case and locked to the case.

  By reducing the contact portion between the heat insulating member holding the heat radiating member and the inner surface of the case as much as possible, heat transfer from the heat insulating member to the case can be reduced. In the above configuration, the heat insulating member is locked by the protruding piece formed on the inner surface of the case, and movement in the circumferential direction along the inner surface of the case is restricted, so that heat transfer from the heat insulating member to the case can be reduced, And since the assembly | attachment to the case of a heat radiating member and a heat insulation member can be performed easily, it can manufacture easily. In addition, it can be easily disassembled during recycling.

  In the straight tube lamp of the present invention, the heat insulating member is configured such that movement in the longitudinal direction relative to the case is restricted by end members attached to both ends in the longitudinal direction of the case. It is preferable that

  According to this, since the movement of the heat insulating member in the longitudinal direction of the case is regulated by being sandwiched between the end members attached to both ends of the case, the assembly is easy, and at the time of recycling It can be easily disassembled.

  In the straight tube lamp of the present invention, the portion of the heat insulating member arranged to partition the heat radiating member and the case has a shape along the inner periphery of the case. It is preferable that

  According to this, the portion of the heat insulating member arranged to partition the heat radiating member and the case makes the case look like a double structure, so that the strength of the case is increased and the occurrence of the warp is more effective. Can be suppressed.

  In the straight tube lamp of the present invention, the heat dissipating member further comprises a U-shaped portion and a flange portion on both sides of the U-shaped portion in a direction perpendicular to the longitudinal direction of the case. It is preferably a hat-shaped configuration in which the substrate is attached to the bottom of the hollow of the U-shaped portion.

  According to this, it becomes possible to block the light with a low color temperature emitted from the oblique direction of the solid state light emitting device at the U-shaped portion, so that the color of the irradiation light of the straight tube lamp can be made uniform. .

  In the straight tube lamp of the present invention, the thickness of the case may be such that the light irradiation side is thinner than the back side.

  By reducing the wall thickness on the light irradiation side, increasing the light use efficiency by irradiating more light, while increasing the wall thickness on the back side, which greatly expands compared to the light irradiation side, It is possible to increase the strength and prevent the case from warping due to thermal expansion. Further, when the thickness on the light irradiation side is reduced without changing the thickness on the back side, the light use efficiency can be increased and the weight can be reduced.

  The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope shown in the claims, and embodiments obtained by appropriately combining technical means disclosed in different embodiments. Is also included in the technical scope of the present invention.

1 LED board 2 LED
3 Heat dissipation member (heat conduction member)
3a U-shaped part 3b ridge part 4 heat insulating member 4A heat insulating member 4A-1 arc part 4A-2 locking part 4A-3 holding part 4A-4 guide wall 4A-5 holding part 4A-6 holding part 4a S-shape Part 4a-1 Holding part 4a-2 Locking part 4b Curved part 4B Heat insulating member 4Bb Curved part 4Ba Five-shaped part 4Ba-1 Holding part 4Ba-2 Locking part 4Bb Curved part 5 Connector part 6 Case 6A Case 6B Case 6Ba Rib 6a Rib 7 Joint part 7a Circular groove 9a Circular groove 7b Horizontal end face 7c Vertical end face 8 Base 8a Terminal 9 Joint part 10 Opening 20 Air layer 21 Air layer 30 Joint part 31 Main body part 31a Circular groove 31b Support part 31c Support part 31d Support Part 31e tension part 32 connector case 32a rib 32b contact part 100 straight tube lamp 100A straight tube lamp 100B straight tube lamp

Claims (3)

A plurality of solid state light emitting devices;
A heat conducting member for conducting heat from the solid state light emitting device;
A straight tube lamp comprising the solid-state light emitting element and a case for housing the heat conducting member,
While a heat insulating member is provided between the heat conducting member and the case,
The heat conducting member, direction perpendicular to the longitudinal direction of the cross-sectional shape of the case, to name a hat made from both sides of the flange portion of the shaped part and the shaped part of該Ko co, shaped the co A substrate on which the solid-state light emitting element is mounted is attached to the bottom of the recess of the part ,
The straight tube lamp, wherein the heat insulating member is provided so as to form an air layer between the heat insulating member and the heat conducting member and / or between the heat insulating member and the case . 2. The straight tube lamp according to claim 1, wherein the heat conducting member is held by the heat insulating member, and the heat conducting member and the case are not in contact with each other. The heat insulating member is formed on the inner surface of the case so as to form a pair of protruding pieces formed in a plane parallel to the central axis of the case, or a pair toward the central axis of the case. 3. The straight tube lamp according to claim 1, wherein movement of the circumferential direction along the inner surface of the case is restricted by the projecting piece and is locked to the case. 4.

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