JP2018063823A - LED lamp - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an LED lamp capable of lowering luminance while securing light quantity.SOLUTION: An LED lamp includes: a long LED substrate on which an LED element is mounted; a translucent cover in which the LED substrate is stored so as to have a translucent surface part opposing to a mounting surface of the LED element; and a support cover for supporting the LED substrate and the translucent cover. The translucent surface part extends in the width direction orthogonal to the longer direction of the LED substrate in the support cover including a portion opposing to the LED substrate. The support cover includes a cover part extending in the width direction in the support cover including a portion opposing to the LED substrate. The maximum width of the translucent surface part is wider than the width of the cover part.SELECTED DRAWING: Figure 7

Description

  The present invention relates to an LED lamp using an LED element as an illumination light source.

  2. Description of the Related Art Conventionally, a straight tube type LED lamp in which an LED element, which is a semiconductor light emitting element, is mounted on an LED substrate extending in the longitudinal direction as an illumination light source is known.

  Moreover, such an LED lamp has a base part for mounting on a socket of a lighting fixture at both ends, and a main body part including an LED substrate between the base parts at both ends.

  The main body portion has a substantially circular cylindrical shape with a cross-sectional shape orthogonal to the longitudinal direction, and is substantially transparent on the illumination side of the LED substrate on which the LED element is mounted. The mainstream has a support cover having a heat dissipation function in which both ends of the light-transmitting cover are joined (see, for example, Patent Documents 1 and 2).

  At this time, the light quantity of the illumination light beam (total light flux) irradiated as a whole of the LED lamp as the LED element emits light, particularly in the case of a straight tube type as general illumination, has a wide spread in the plane perpendicular to the longitudinal direction. It is desirable to do.

  At this time, if the LED element is moved closer to the translucent cover than the tube axis in the translucent cover as in Patent Document 1 due to the recent increase in brightness of the LED element, the LED element is transparent. Since the illumination light which permeate | transmits a light-transmitting cover will permeate | transmit a light-transmitting cover before fully diffusing, there existed a problem of feeling dazzling.

  On the other hand, in Patent Document 2, the cylindrical cover is formed so that the illumination light transmitted from the LED element through the translucent cover is diffused by moving the arrangement of the LED elements closer to the support cover than the tube axis, and the diffusion angle is further expanded. The uneven thickness part is formed.

  In Patent Document 2, the cover is placed at a position closer to the LED element than the center of the arc of the inner wall surface of the cover in a cross section orthogonal to the tube axis of the translucent cover, that is, a position offset to the opposite side to the irradiation direction of the LED element. The wall has an arc center. And, the wall thickness of the translucent cover is larger than the circle of the cover inner wall surface based on the arc center of the cover inner wall surface, and the circle of the cover outer wall surface based on the arc center of the cover outer wall surface is larger in diameter. Thus, a thick uneven portion is formed.

JP 2013-254663 A JP 2013-214390 A

  However, in such an LED lamp disclosed in the prior art document, the cross-sectional shape orthogonal to the longitudinal direction of the main body is a cylindrical shape with a substantially circular shape as a reference.

  For this reason, with the recent increase in the brightness of LED elements, the brightness of the illumination is too high. For example, even if the LED elements are brought close to the support cover, the LED board has a certain width, so However, there is a problem that the glare when the user looks directly at the translucent cover cannot be sufficiently reduced.

  In order to solve the above-described problems, an object of the present invention is to provide an LED lamp capable of reducing the luminance while securing the light amount.

  In order to achieve the above object, an LED lamp according to the present invention has a long LED substrate on which an LED element is mounted and a light-transmitting property in which the LED substrate is accommodated so as to have a light-transmitting surface portion facing the mounting surface of the LED element. A cover, and a support cover that supports the LED substrate and the translucent cover, and the translucent surface portion extends in a width direction orthogonal to the longitudinal direction of the LED substrate in the support cover including a portion facing the LED substrate, The support cover includes a cover portion extending in the width direction of the support cover including a portion facing the LED substrate, and the maximum width of the translucent surface portion is wider than the width of the cover portion.

  According to the present invention, it is possible to reduce the luminance while securing the amount of light.

It is a disassembled perspective view of an LED lamp. It is a side view of an LED lamp. It is sectional drawing of the principal part along the width direction of a LED lamp. It is sectional drawing of the principal part along the longitudinal direction of an LED lamp. (A) is a side view of the LED lamp, (B) is a plan view of one end of the LED lamp. (A) is a front view of a cap, (B) is a rear view of a cap. It is explanatory drawing which shows the dimensional relationship of the principal part of an LED lamp. The example which attached the LED lamp to the lighting fixture is shown, (A) is explanatory drawing which shows the relationship between a U-shaped umbrella part and two LED lamps, (B) is a mountain-shaped umbrella part and two LED Explanatory drawing which shows the relationship with a lamp | ramp, (C) is explanatory drawing which shows the relationship between an M-shaped umbrella part and two LED lamps. The example which made the nozzle | cap | die part unrotatable with a cap is shown, (A) is a side view of an LED lamp, (B) is a top view of one edge part of an LED lamp. It is the side view of the state which showed the example which made the nozzle | cap | die part non-rotatable with a cap, and removed the cap of the LED lamp. The example which made the nozzle | cap | die part non-rotatable with a cap is shown, (A) is a front view of a cap, (B) is a rear view of a cap. It is the side view of the state which showed the example which made the nozzle | cap | die part unrotatable with a screw | thread, and removed the cap of the LED lamp. It is sectional drawing of the principal part which shows the example which made the nozzle | cap | die part unrotatable with the screw | thread, and follows the longitudinal direction of a LED lamp.

  Next, an embodiment according to the present invention will be described with reference to the drawings. In the following description, the amount of the total luminous flux emitted from the LED element (hereinafter sometimes referred to as “illumination light source”) in all directions is lumen (lm), and the LED element is irradiated in a specific direction. Let the amount of light intensity be a candela (cd), and the amount of brightness of a certain surface illuminated by the light emitted from the LED element be lux (lx).

  As shown in FIGS. 1 and 2, the LED lamp 1 includes a long LED substrate 10 on which the LED element 11 is mounted, a translucent cover 20 that faces the mounting surface of the LED element 11, and the LED substrate 10 and the transparent LED substrate 10. A support cover 30 that supports the light-sensitive cover 20, a lid body portion 40 that closes both ends of the translucent cover 20 and the support cover 30, and a power supply terminal 51 that protrudes from the lid body portion 40. A projecting cylindrical base part 50; a cap 60 that is detachably attached to the lid part 40 and surrounds a part of the base part 50; and a power supply unit 70 connected to the one base part 50. ing.

  In FIG. 2, reference symbol P <b> 1 is a tube axis with the center of the cylindrical cap 50 as a reference. That is, the tube axis P1 passes through the intersection of a line segment connecting the centers of the pair of terminals 51 adjacent to each other in the depth direction of the page, and a line segment passing through the center between the pair of terminals 51 with respect to this line segment. It is a line segment. The tube axis P1 corresponds to, for example, the tube axis of an existing straight tube fluorescent lamp having a perfect circular cylindrical shape.

  In the following description, the direction along the tube axis P1 is referred to as “tube axis direction” or “longitudinal direction”, and the horizontal direction perpendicular to the tube axis P1 is referred to as “width direction” or “left-right direction”. A vertical direction orthogonal to the axis P1 is referred to as a “height direction”, “vertical direction”, or “vertical direction”. In addition, these directions are used as the reference for the upper, lower, left, and right directions. In particular, the upper and lower in the height direction is, for example, the upper and lower (upper and lower) when the LED lamp 1 is mounted on a lighting fixture body (not shown) installed on the ceiling of the building. To match.

  As shown in FIGS. 3 and 4, the LED substrate 10 has, for example, a large number of LED elements 11, which are semiconductor light emitting elements, mounted on the irradiation surface side (lower surface side).

  The LED element 11 is an LED substrate 10 that is arranged in a sheet form during manufacture (see FIG. 1). However, the mounting method does not matter, such as fixing a large number of LED elements 11 to the LED substrate 10 individually by solder welding. The shape or the like of the LED element 11 is not particularly limited, but a rectangular light emitting surface that is a square or a rectangle having a long side extending in the width direction perpendicular to the longitudinal direction along the tube axis P1 in a front view. Use what you have. In the example shown in FIG. 1, the LED elements 11 have rectangular light emitting surfaces with long sides extending in the width direction perpendicular to the longitudinal direction along the tube axis P <b> 1, along the longitudinal direction in one row on the LED substrate 10. Are mounted at approximately equal intervals. The LED element 11 is supplied with electric power by connecting a power supply terminal (not shown) to the connection connector 12 provided at the end of the LED substrate 10.

  The LED substrate 10 is covered with a sheet 13 opened so that the LED elements 11 are exposed. The sheet 13 has a surface having a high reflectance such as white, and has a function of diffusing and reflecting the illumination light of the LED element 11. The sheet 13 is fixed to the support cover 30 via the holder block 14 at a plurality of positions in the longitudinal direction. In the following description, a unit including the LED substrate 10, the LED element 11, the sheet 13, the holder block 14, and the like may be referred to as a “light source unit”.

  The translucent cover 20 is formed of, for example, a white transparent translucent resin, and has lid portions 40 fitted into both ends in the longitudinal direction. The translucent cover 20 has a translucent surface portion 21 extending in the width direction perpendicular to the longitudinal direction of the LED substrate 10 in the support cover 30 including a portion facing the LED substrate 10. Moreover, the translucent cover 20 has integrally the connection part 22 which inclined in the direction which mutually approaches in the both ends of the cross-sectional direction orthogonal to the pipe axis P1 of the translucent surface part 21. As shown in FIG. Further, the translucent cover 20 integrally has an engaging portion 23 that engages with the support cover 30 at the end edge of the connecting portion 22. In addition, the more specific shape, dimension, etc. of the translucent cover 20 are mentioned later.

  The engagement portion 23 is formed by bending both edges of the connection portion 22 inwardly, a plate-like engagement piece 24 that extends in the longitudinal direction at the tip and protrudes in the vertical direction, and outward from the engagement piece 24. And a rib 25 protruding into the body.

  The support cover 30 is, for example, an extrusion-molded product made of a metal such as aluminum, and has an irregular cylindrical shape that is closed in a cross section orthogonal to the tube axis P1. The support cover 30 has a cover portion 31 having a circular cross-section in the width direction facing the translucent surface portion 21 in the outer shape. Further, the support cover 30 integrally includes connection portions 32 that are inclined in directions away from each other at both ends in a cross-sectional direction orthogonal to the tube axis P1 of the cover portion 31. Further, the support cover 30 integrally has an engaged portion 33 that engages with the translucent cover 20 at the end edge of the connection portion 32. Further, the support cover 30 includes a flat support portion 34 for fixing the LED substrate 10 on the outer surface side, a partition wall portion 35 rising from both end edges along the longitudinal direction of the support portion 34 toward the connection portion 32, and A female screw portion 36 for screwing a set screw 2 for connecting the support cover 30 to the lid body portion 40 is integrally provided at a boundary portion between the support portion 34 and the partition wall portion 35.

  The engaged portion 33 has a slit-shaped guide groove 37 that engages with the engaging piece 24 and the rib 25 with the partition wall portion 35 as a bottom wall.

  As shown in FIGS. 4 and 5A, the lid 40 has a base 41 that has a fan shape in a front view. The base 41 integrally includes an insertion recess 42, an abutting flange 43, a flange 44, a rib-shaped flange 45, an engagement claw 46, and a pair of locking claws 47. The lid part 40 has a base part having a pair of terminals 51 for supplying power for lighting the LED element 11 at both ends of the translucent cover 20 and the support cover 30 as shown in FIGS. 50 is closed in a state of protruding so as to be relatively rotatable.

  The insertion recess 42 protrudes toward the back surface side of the base portion 41 and opens to the front surface side so that the base side of the base portion 50 can be inserted (or press-fit) into a cylindrical hole portion 42a, A pair of screw hole portions 42b extending in the normal direction from the cylindrical hole portion 42a and fixing the support cover 30 to the lid body portion 40 via the set screw 2 are provided.

  The abutting flange portion 43 projects inward (inner side of the tube) from the projecting end of the insertion recess 42 and abuts the base side of the base portion 50, and covers the base portion 50 via the screw 16 and the fixing block 17. The part 40 is fixed.

  The flange portion 44 extends a part of the abutting flange portion 43 as it is on the top side of the base portion 41 and supports the end portion in the longitudinal direction of the cover portion 31 in abutting state.

  The rib-shaped flange portion 45 protrudes inward on the skirt side of the base portion 41 and supports the end portion in the longitudinal direction of the translucent cover 20 in an abutting state.

  The engaging claw portion 46 protrudes outward at the center of the skirt portion side of the base portion 41 and expands outward as shown in FIG.

  The base part 50 has a cylindrical main body part 52 in which a pair of terminals 51 protrude from the end faces, and an operation part 53 that protrudes from the outer wall surface of the main body part 52. The operation unit 53 includes an operation lever 54 extending from the base unit 50 in a direction perpendicular to the tube axis direction, and a knob 55 provided at the tip of the operation lever 54. As shown in FIG. 5A, the operation unit 53 is in a use state (indicated by a solid line and a broken line) in which a pair of terminals 51 are arranged in the horizontal direction in the figure, that is, a state in which the LED lamp 1 is mounted on the luminaire body. The pair of terminals 51 can be rotated between an operation state (indicated by a chain line) in which the terminals 51 are arranged in the vertical direction, that is, a state in which the LED lamp 1 is attached to or detached from the lighting fixture body. When the lid 40 is the main body, only the base 50 is supported by the lid 40 so as to be rotatable relative to the lid 40, and the light source unit and the power supply unit 70 are attached to the lid 40. It is fixed to it. Therefore, even if the base part 50 is rotated, the light source unit and the power supply unit 70 do not rotate around the tube axis. For this reason, the cap part 50 and the power supply unit 70 are electrically connected by a wiring cord (not shown).

  Specifically, the base part 50 extends along the tube axis direction with respect to the lid part 40 so that the direction of the terminal 51 protruding from the end surface is changed between the use position and the operation position by the operation of the operation part 53. Rotate in the same plane without changing the length. Therefore, the lid 40 supports the base 50 rotatably at both ends in the longitudinal direction so that the orientation of the terminal 51 allows and regulates the rotation between the use position and the operation position. At this time, the lid portion 40 supports the support cover 30 and the translucent cover 20 on the inner surface, and supports the base portion 50 so as to be rotatable in the same plane at a position close to the support cover 30 on the outer surface. At the same time, a cap 60 surrounding the periphery of the base part 50 is detachably supported at a position close to the translucent cover 20 on the outer surface.

  For example, when the socket of the luminaire main body is a push-in type, the rotation of the base part 50 with the tube axis P1 as the central axis is difficult to see due to the wide translucent cover 20. By changing the translucent cover 20 in the vertical direction, the relative positional relationship between the socket and the base part 50 can be easily seen. On the other hand, when the socket is a rotation type, the base is rotated so that the terminal orientation matches the terminal insertion direction of the socket, and after inserting the terminal into the socket, the terminal is rotated (returned) to the use state. ) Can be easily mounted.

  As shown in FIGS. 5 and 6, the cap 60 regulates the rotation angle of the base part 50 and detachably attaches to the lid body part 40 to surround a part of the base part 50. Accordingly, the cap 60 is removed from the lid 40 before the LED lamp 1 is mounted (before mounting) with respect to the luminaire main body installed on the ceiling of the building or the like, and the lid 60 is mounted after the LED lamp 1 is mounted (after mounting). By fitting into the body part 40, the base part 50 is covered from below and the appearance is improved.

  The cap 60 opens the inner side of the tube facing the lid portion 40. As shown in FIG. 5A, a substantially lower half region when the side surface (end surface) of the LED lamp 1 is fan-shaped is formed. The LED lamp 1 covers the entire width of the LED lamp 1 and has a length (depth) that covers the lower portion of the base portion 50 in the length direction along the tube axis P1.

  The cap 60 includes an outer peripheral wall 61 that forms a fan-shaped outer shell, a partition wall 62 that is located in the middle of the outer peripheral wall 61 in the depth direction and that is located in the vicinity of the boundary between the body portion 52 of the base portion 50 and the terminal 51, and the inner side of the peripheral wall And a plurality of ribs 64 that stand at a predetermined height from at least one of the upper surface of the inner bottom wall 63 and the inner wall surface of the partition wall 62 and extend inward of the pipe, and are spaced apart in the width direction. And a holding portion 66 that holds the pair of leaf spring portions 65.

  The outer peripheral wall 61 extends from the bottom surface to the side surface of the cap 60, and an engagement recess 61a (see FIG. 4) that engages with the engagement claw portion 46 is formed at the opening edge of the bottom surface. In addition, since the engagement recessed part 61a is the same shape as the engagement nail | claw part 46, only the code | symbol of the engagement claw part 46 is illustrated in FIG.5 (B), and the code | symbol 61a is illustrated only in FIG. At this time, the engaging claw 46 and the engaging recess 61a are narrowed toward the opening edge, and prevent the cap 60 from coming off in the tube direction. The inner surface of the outer peripheral wall 61 that extends from the outer side in the width direction to the inner side also serves as an abutting surface that abuts the locking claw portion 47. As a result, the cap 60 is supported by the lid body portion 40 according to the contact state with the pair of locking claws 47 and the engagement state with the engagement recess 61 a with respect to the engagement claw portion 46.

  The partition wall 62 is formed with an arc-shaped recess 62 a that supports the lower surface of the base portion 50 at the center thereof.

  As shown in FIG. 6 (B), the leaf spring portion 65 is bent in a substantially L shape in front view and is engaged with the lower end support portion 66a of the holding portion 66 on the lower end side. The support portion 65a bent in a shape is integrally bent, and the contact portion 65b bent inwardly at the upper end side, that is, with a vertex in a direction approaching each other, is integrally bent. Have to. Thereby, the contact portion 65 b can be engaged with the operation portion 53 of the base portion 5. Therefore, the contact portion 65b has a function as a fixing portion that fixes the base portion 50 at the use position.

  By adopting such a configuration, before the cap part 50 is attached to the lid body part 40 and the LED lamp 1 is attached to the luminaire main body installed on the ceiling of the building, for example, When the socket that engages with the terminal 51 provided in the lighting fixture main body is a rotary type, the operation unit 53 is operated to position the pair of terminals 51 vertically (positions indicated by chain lines in FIG. 5A). Thus, the terminal 51 can be inserted into the terminal insertion groove (not shown) of the socket. In the conventional fluorescent lamp, in this state, the entire fluorescent lamp is rotated to hold the fluorescent lamp in the luminaire main body, and at the same time, the operation that is in a transcriptional energized state is operated by operating the operation unit 53 to operate the base unit. 50 may be returned and rotated so that the pair of terminals 51 are positioned to the left and right (positions indicated by solid lines in FIG. 5A). Then, the cap 60 is attached to the lid 40 from this state. Thus, the base part 50 can be attached to the luminaire main body by rotating the operation part without rotating the entire LED lamp 1. Therefore, when the LED lamp 1 is attached to the luminaire main body, the LED lamp 1 can be attached even in a narrow installation place without interfering with the luminaire main body.

  Further, the cap 60 is a plate for restricting the rotation position of the base portion 50 by restricting the rotation of the operation portion 53 beyond the contact of the operation portion 53 with the contact portion 65 b of the leaf spring portion 65. A spring portion 65 is arranged. Thereby, when attaching cap 60 to lid part 40, when base part 50 is rotating too much, ie, the whole LED lamp 1 except base part 50 is inclined and attached to a lighting fixture main part. In this case, since the cap 60 cannot be mounted on the lid body 40, erroneous attachment (tilt mounting) of the LED lamp 1 to the luminaire body can be suppressed. In addition, since it is necessary to provide the cap part 50 of the same structure in the both ends of the LED lamp 1, the direction of the operation part 53 in the both ends of the LED lamp 1 becomes reverse direction (refer the dashed line of FIG. 5 (A)). Therefore, by disposing the leaf spring portions 65 at both ends of the cap 60, it is possible to contribute to the common use of the cap 60, and the user can easily perform the attaching / detaching operation of the cap 60 without erroneous attachment.

  In addition, when the socket of a lighting fixture main body is a pushing type, the rotation operation of the said nozzle | cap | die part 50 is unnecessary. At this time, for example, when the ceiling position of the lighting fixture body is near the wall, the LED lamp 1 may be fan-shaped, so that the position of the terminal hole of the socket may be difficult to see. Therefore, even in such a case, if the base part 50 is rotated and the entire LED lamp 1 excluding the base part 50 is vertically oriented, the position of the terminal 51 can be easily confirmed. In this case, after engaging the base part 50 with the socket, instead of rotating the base part 50, the entire LED lamp 1 except the base part 50 is rotated downward.

  As shown in FIGS. 1 and 3, the power supply unit 70 includes a power supply board 71 and a power supply cover 73 that covers various electronic components 72 related to power supply control mounted on the power supply board 71.

  The power supply substrate 71 is located on the surface opposite to the mounting surface of the LED element 11 with respect to the support portion 34 of the support cover 30, and is connected to the base portion 50 via the bracket 15. The bracket 15 is an integrally molded product of resin. As shown in FIG. 4, the bracket 15 is supported by the lid body portion 40 after the lid body portion 40 is fixed to the base portion 50 via the screw 16 and the fixing block 17.

  The power supply cover 73 and the partition wall 35 are opposed to each other with a space, and a wiring cord 3 for electrically connecting the power supply substrate 71 and the LED substrate 10 is arranged in the space. (See FIG. 3).

  In the above basic configuration, a specific example will be described. Here, when a straight tube type LED lamp is mounted instead of a straight tube type fluorescent lamp mounted on an existing lighting fixture body, at least the size of the base, in particular, the distance between a pair of terminals needs to be the same. . Moreover, since the socket of a general lighting fixture main body is a push-in type, the outer diameter of the base (the outer diameter of the tube part depending on the push-in degree) should not be trapezoidal than the outer diameter of the socket.

  Generally, existing LED lamps have different lengths, cap diameters, and tube diameters depending on their use. For example, in the case of a lighting fixture installed on the ceiling of a building, the distance between a pair of terminals A G13 base having a diameter of 12.7 mm is widely used. At this time, the outer diameter of the LED lamp of the G13 base is 20 mm, the outer diameter of the tube part is 25 mm to 28 mm, and the light emitting surface of the LED element is about 1.6 to 3 mm × 0.8 to 1.4 mm. . Here, the G13 base is taken as an example, but is not limited to this base standard, and other base standards (for example, JEL801 standard, etc.) or various base standards that will be adopted in the future are as follows. It is possible to apply the configuration.

  Therefore, in the following description of various dimensional relationships, the case where the LED lamp 1 is replaced with the above-described lighting fixture body for the G13 base and the fluorescent lamp will be described.

  As shown in FIG. 7, the outer cover of the translucent cover 20 and the support cover 30 functions as the cover C of the LED lamp 1 in substantially the whole along the tube axis direction of the LED lamp 1. Therefore, in the following description, the cover function of the LED lamp 1 as a whole will be referred to as a cover C. In other words, the cover C has the connecting portions 22 and 32 as the enlarged diameter portions having a width equal to or larger than the diameter of the base portion 50 in the width direction perpendicular to the tube axis direction.

  Here, first, the LED lamp 1 includes a long LED substrate 10 on which the LED element 11 is mounted, a translucent cover 20 that faces the mounting surface of the LED element 11, and the LED substrate 10 and the translucent cover 20. The translucent cover 20 includes a translucent surface portion 21 extending in the width direction perpendicular to the longitudinal direction of the LED substrate 10 in the support cover 30 including a portion facing the LED substrate 10. The support cover 30 includes an arc-shaped cover portion 31 extending in the width direction of the support cover 30 including a portion facing the LED substrate 10, and the maximum width W <b> 1 of the translucent surface portion 21 is wider than the maximum width W <b> 4 of the cover portion 31. It is said. More specifically, the maximum width W1 of the translucent surface portion 21 is wider than the maximum width W3 of the support cover 30.

  In FIG. 7, symbol W <b> 1 is the maximum width of the translucent surface portion 21, symbol W <b> 2 is the maximum width of the support cover 30, symbol W <b> 3 is the internal width of the support portion 34 of the support cover 30, and symbol W <b> 4 is the maximum width of the cover portion 31. , W5 is the width of the power supply board 71, and W6 is the width of the LED board 10. The maximum width W1 is the same as the maximum width of the LED lamp 1.

  In FIG. 7, reference numeral H <b> 1 is the height (maximum separation distance) from the irradiation surface of the LED element 11 to the ridge line of the support cover 30, and reference numeral H <b> 2 is from the irradiation surface of the LED element 11 to the ridge line of the translucent cover 20. Height (maximum separation distance). As described above, the widths W1 to W5 are set to be narrow with a predetermined size or ratio in that order. A detailed description of each width will be described later. Similarly, the height H1 is set lower than the height H2. That is, the LED lamp 1 is in a state of being separated from the LED element 11 over the entire translucent surface portion 21 having the maximum width W1 wider than the diffusion angle θ1 (= 120 °) in the width direction of the LED element 11, for example. ing.

  Further, in FIG. 7, reference numeral P1 is a tube axis, reference numeral P2 is an intersection between a circle of a perfect circle S2 having the maximum width W2 of the support cover 30 as an inscribed circle, and immediately below the center of the LED element 11, and reference numeral P3 is a support cover. 30 is a boundary point between the cover portion 31 and the connection portion 32, P4 is a boundary point between the translucent surface portion 21 and the connection portion 22 of the translucent cover 20, and P5 is a diffusion angle of the LED element 11 of 120 °. The intersection with the light-transmitting surface portion 21 in the case. The intersection point P2 is larger than the tube diameter of the existing fluorescent lamp, and the maximum separation distance from the LED element 11 when the LED lamp 1 is a cylindrical tube, that is, illumination by the translucent cover. This corresponds to the maximum separation distance at which light can be diffused. On the other hand, the translucent cover 20 is shaped like a fan and the height H2 is secured, so that a maximum distance from the center of the LED element 11 can be secured.

  Further, at least one of the translucent cover 20 and the support cover 30 (both in the illustrated example) connects the translucent surface portion 21 and the cover portion 31 and extends in the width direction from the cover portion 31 toward the translucent surface portion 21. The cover C that expands in diameter has connection portions 22 and 32 as a whole.

  Furthermore, the cover part 31 is an arc narrower than the maximum width W2 in the width direction of the support cover 30, and the connection part 32 is continuously continuous from both ends in the width direction of the arc. In FIG. 7, the arc of the cover portion 31 indicates that it is a part of the perfect circle S1, and the connection portion 32 indicates a portion that deviates from this perfect circle S1. In FIG. 7, reference numeral S <b> 2 is an example of a perfect circle including the entire internal structure described later. Incidentally, the diameter of the perfect circle S <b> 2 is an inscribed circle with the maximum width W <b> 2 of the support cover 30, and is approximately equal to or greater than the maximum width W <b> 2 of the support cover 30. In other words, each part disposed inside the LED lamp 1 is within the range of the maximum width W2 of the support cover 30 in the width direction. The perfect circle S1 is larger in diameter than the diameter of the base part 50 and is equal to the tube diameter of an existing G13 base type fluorescent lamp.

  The translucent surface portion 21 has an arc shape, a semi-elliptical shape, a parabola shape, or a polygonal shape (for example, three faces of regular hexagons, three faces or five faces of regular octahedrons) reaching both ends in the width direction, It is desirable to adopt either of these. At this time, it is preferable that both ends in the width direction are the connection portions 22 whose outer surfaces continue straight from the connection portions 32 as they are. In FIG. 7, reference numeral S <b> 3 is an example of an ellipse including the translucent surface portion 21.

  The translucent cover 20 takes into account the maximum width W1 in the width direction, the diffusion angle θ1 in the width direction of the illumination light irradiated from the LED element 11, and the maximum separation distance between the LED element 11 and the light-transmitting surface portion 21. The brightness of the illumination light transmitted through the light transmitting surface portion 21 is set.

  The cover 31 has a cross-sectional maximum width W4 wider than the width W6 of the LED substrate 10 and a perfect circle S2 having the maximum width of the support cover 30 as an inscribed circle is the maximum width of the power supply substrate 71. By adopting a trapezoidal shape rather than W5, the power supply unit 70 can be stored in the support cover 30 without difficulty.

  In the LED lamp 1 having such a dimensional relationship, the cover portion 31 is a circular arc (a part of the perfect circle S1) having a maximum width W4 that is narrower than the maximum width W2 in the width direction of the support cover 30 in the cross-sectional shape. The connection portions 22 and 32 of the cover C as a whole are gently continuous from both ends in the width direction of the arc. At this time, the translucent surface portion 21 has an arc shape, a semi-elliptical shape, a parabolic shape, or a polygonal shape in cross section extending to both ends in the width direction, so that the translucent surface portion 21 and the connection portion 22 at the boundary point P4. Can be continued without difficulty. Similarly, also in the cover part 31 and the connection part 32 of the support cover 30, by making the cover part 31 into a circular arc in cross section, it can be reasonably continued at the boundary point P3.

  Accordingly, the cover C has a cross-sectional shape orthogonal to the tube axis direction, and a cover portion 31 whose cross section in the width direction facing the back surface opposite to the mounting surface of the LED substrate 10 is arcuate, and the width direction of the cover portion 31. Connecting portions 22 and 32 that connect the both ends of the light-transmitting surface portion 21 and the both ends of the translucent surface portion 21 in the direction of the maximum width W1 in an inclined manner, and the cover C is between the boundary point P3 and the boundary point P4. The connecting portions 22 and 32 that are positioned are diameter-increased portions in which imaginary line segments connecting both ends of the cover portion 31 in the width direction and both ends of the translucent surface portion 21 in the maximum width W1 direction are inclined linearly. Can do.

  Note that the virtual line segment is caused by the fact that the connecting portions 22 and 23 connecting the boundary point P3 and the boundary point P4 are preferably continuous on a straight line in the cross-sectional shape (details will be described later). However, there is no denying that the line segment connecting the boundary point P3 and the boundary point P4 has, for example, a shape bulging outward or a shape recessed inward. In particular, since the translucent surface portion 21 is substantially semi-elliptical and the cover portion 31 is on an arc, the connection portions 22 and 23 can be reasonably continued at the boundary points P3 and P4. It does not prevent it from being non-linear.

  Further, the inclination angle of the imaginary line segment is wider than the diffusion angle θ1 of the illumination light irradiated from the LED lamp 1 by positioning the boundary point P4 at the intersection with the angle θ2 wider than the diffusion angle of the LED element 11. And the diffusion effect of illumination light can be secured. The boundary point P4 is at a position closer to the LED element 11 in the direction along the height H2 than the intersection point P2.

  Thus, by making the LED lamp 1 fan-shaped and making the translucent surface portion 21 wider than the LED substrate 10, it is possible to reduce the luminance while ensuring the amount of light. Table 1 shows the comparison results of the luminance between the LED lamp 1 of the present embodiment and various conventional lighting devices.

  At this time, the maximum width W1 of the LED lamp 1 is such that, for example, as shown in FIG. 8A, a pair of (two) fluorescent lamps are attached when the umbrella 4 of the existing lighting fixture body is used as a reference. Even if it is what made it, the two LED lamps 1 can be attached now. Further, as shown in FIG. 8B and FIG. 8C, even if the shape of the umbrella 4 is a mountain shape or an M shape in order to secure the reflection function, The widened portion of the LED lamp 1 can be attached to the inclined portion, ensuring versatility.

  Here, although the operation part 53 disclosed what controlled the rotation position of the nozzle | cap | die part 50 with the cap 60, depending on the structure of the cap 60, the rotation control structure of the nozzle | cap | die part 50 is not limited above. .

  For example, as illustrated in FIGS. 9 to 11, the configuration of the LED substrate 10, the translucent cover 20, and the support cover 30 is not changed, and the rotation position of the operation unit 53 on the outer wall surface side of the lid body 40, that is, Alternatively, the above-described leaf spring portion 65 may be eliminated by providing a restriction protrusion 48 as a positioning portion for restricting (positioning) the rotational position of the base portion 50. At this time, although the rotational positions of both ends of the base part 50 can be restricted by contacting the restriction projection 48, the rotation of the base part 50 itself cannot be restricted by the restriction protrusion 48.

  Therefore, a slit 56 along the tube axis P1 is formed at a position that becomes a bottom surface when the cap 50 is in use, and a pair of engaging ribs 67 spaced apart in the width direction and a center in the width direction are formed in the cap 60. One engaging tongue 68 is formed. Thus, the unexpected rotation of the base part 50 is restricted by engaging the engaging rib 67 and the engaging tongue piece 68 with the slit 56. Note that either the engagement rib 67 or the engagement tongue piece 68 may be used.

  Further, as shown in FIGS. 12 and 13, a screw system may be used instead of the engagement rib 67. In this case, the lid portion 40 is integrally provided with a flange portion 49 for fixing the cap 60 near the center of the base portion 41. A screw insertion hole 49 a is formed in the flange portion 49. A slit 56 is formed in the base part 50 in the same manner as described above.

  On the other hand, the cap 60 is formed with a notch 61 b (see FIG. 13) on the opening end side of the outer peripheral wall 61, and a screw support portion 69 is integrally formed near the opening edge of the inner bottom wall 63. The screw support portion 69 is thicker than the wall thickness of the inner bottom wall 63, and forms a screw through hole 69a extending in the vertical direction. The upper surface of the screw support portion 69 comes into contact with the bottom surface of the flange portion 49. A nut 81 is embedded in the upper surface of the screw support portion 69 so as to surround the screw through hole 69a. A screw 82 is screwed onto the nut 81 so that the tip end faces upward, that is, toward the slit 56, and the screw 82 is held.

  The tip end of the screw 82 is screwed with an engaging head 83 that engages with the slit 56 at the upper surface side of the flange portion 49, that is, a position that sandwiches the flange portion 49 with the nut 81. The engaging head 83 is integrally provided with an annular flange 84 that engages with a groove 41 a formed on the outer surface of the base 41 and above the flange 49.

  Even in such a configuration, when the base portion 50 is rotated, the cap 60 is matched with the lid portion 40 after the engaging head 83 is engaged with the slit 56 after returning to the use position. Then, the unexpected rotation of the base part 50 can be restricted by screwing the tip of the screw 82 into the engaging head 83.

  By the way, the LED lamp 1 of the present invention is not limited to the above-described example, and the technical scope described in the claims includes various design changes within the scope not departing from the gist of the invention. included.

  For example, in addition to the light source disclosed in the above embodiment, for example, a laser diode or an organic light emitting diode can be used, and the type of the light source is not particularly limited.

  Moreover, although the LED lamp 1 demonstrated the case where the power supply circuit which mounted the electronic component 72 for the lighting control of the LED element 11 on the power supply board 71 was provided in the LED lamp 1, this power supply circuit is a lighting fixture main body which is not shown in figure It may be provided inside. In addition, you may divide | segment and arrange | position a power supply circuit into the lighting fixture main body and the LED lamp 1 as needed.

  Furthermore, the various dimensions described above are merely examples, and are not intended to be strictly numerically limited. For example, when the LED lamp 1 is mounted on an existing lighting fixture body instead of the fluorescent lamp, The size can be made in accordance with the base size of the fluorescent lamp attached to the target lighting fixture body.

  As described above, the LED lamp according to the present invention has an effect that the luminance can be lowered while securing the light amount, and is useful for all LED lamps using an LED element as an illumination light source.

DESCRIPTION OF SYMBOLS 1 LED lamp 10 LED board 11 LED element 20 Translucent cover 21 Translucent surface part 30 Support cover 31 Cover part

Claims (6)

A long LED substrate mounted with LED elements;
A translucent cover that houses the LED substrate so as to have a translucent surface portion facing the mounting surface of the LED element;
A support cover for supporting the LED substrate and the translucent cover;
With
The translucent surface portion is
Extending in the width direction perpendicular to the longitudinal direction of the LED substrate in the support cover including the portion facing the LED substrate,
The support cover is
A cover portion extending in the width direction in the support cover including a portion facing the LED substrate;
The maximum width of the translucent surface portion is wider than the width of the cover portion,
LED lamp. At least one of the translucent cover and the support cover includes
The light transmitting surface portion and the cover portion are connected, and a connecting portion that expands in the width direction from the cover portion toward the light transmitting surface portion is provided.
The LED lamp according to claim 1. The cover part is
An arc that is narrower than the maximum width in the width direction of the support cover;
The connecting portion is
Gently continues from both ends of the arc in the width direction,
The LED lamp according to claim 2. The translucent surface portion is
The cross-sectional shape that reaches both ends in the width direction is an arc shape, a semi-elliptical shape, a parabolic shape, or a polygonal shape,
The LED lamp according to claim 2 or claim 3, wherein The translucent cover and the support cover are:
Openings at both ends in the longitudinal direction are closed by a lid part that projects a base part for power supply for lighting the LED element so as to be relatively rotatable,
The lid portion is
A rotation angle of the base part is regulated, and a cap is provided to surround at least a part of the base part.
The LED lamp according to any one of claims 1 to 4, wherein: The translucent surface portion is
Luminance of illumination light transmitted in consideration of the maximum width in the width direction, the diffusion angle in the width direction of illumination light emitted from the LED element, and the maximum separation distance between the LED element and the light-transmitting surface portion Set
The LED lamp according to any one of claims 1 to 5, wherein:

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