JP2013134911A - Lamp with built-in light-emitting source - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lamp capable of surely preventing break of a lead wire connecting to an electrode piece of a cap part and yet easily matching rotating positions of the cap parts of either side, in one enabled to adjust the cap parts in turning against a lighting device body.SOLUTION: Each of the cap parts 13 includes a turning member 13a having a pedestal part 13aa equipped with an electrode piece 13c and a base part 13ab further expanded outward than the pedestal part 13aa, and a ring member 13b having an opening 13bd for letting the pedestal part 13aa of the turning member 13a pass through it, and an expanded diameter part 13be holding the base part 13ab of the turning member 13a by pressure-contacting it to an end face of a lighting device body 10. The turning member 13a is structured to include turning-regulating mechanisms 13ad, 13ba for limiting its turning range.

Description

  The present invention relates to an improvement of a light source built-in lamp in which a pair of bases are rotatably provided on both end faces of an illumination main body in which a light source is installed so that light distribution can be adjusted.

  In recent years, due to an increase in energy saving, a low power consumption type using a light emitting diode or the like is increasingly used instead of a conventional type lighting fixture. A straight tube fluorescent lamp is no exception, and a straight tube light source interior lamp having an appearance similar to this and having a substrate mounted with a light emitting diode mounted therein has been developed and marketed.

  However, a light emitting diode has a light emission principle different from that of a fluorescent lamp and irradiates light to a specific range rather than the entire surroundings. Therefore, when a straight tube lamp is used, only the area directly below the lamp is bright. Illuminated. However, depending on the lamp usage and grounding location, there is a desire to illuminate other than the area directly under the lamp. As an example of the prior art corresponding to such a request, the following patent document discloses an LED lamp in which a base attached to a straight tubular LED unit can be rotated with respect to the axis of the LED unit. . In this case, since the angle of the LED unit with respect to the luminaire also changes depending on the angle of the base, a desired light distribution can be obtained.

Republished Patent W2009-154162

  According to the above-mentioned patent document, the base is freely rotatable with respect to the LED unit. For such rotation, a brush mechanism is used for electrical connection between the LED unit and the base. However, if a brush mechanism or the like is employed, there is a problem that the product becomes expensive. There is also a description of a configuration in which the LED unit and the base are electrically connected by a wiring cable. However, in that case, the wiring cable may be erroneously disconnected during light distribution adjustment. Further, in a lamp with a freely rotatable base, it is difficult to match the rotational position of the base at both ends of the lamp when it is attached to a lighting fixture.

  In view of this, the present invention provides a lamp in which the base part can be pivotally adjusted with respect to the illumination main body, and a first lamp is obtained in which disconnection of the lead wire that electrically connects the electrode piece of the base part is reliably prevented. A second object is to obtain a lamp that can easily match the rotational positions of the caps on both sides.

  The light source built-in lamp according to the present invention has an illumination main body in which the light source is built, and a pair of base portions rotatably provided on both end faces of the illumination main body, each of the base portions being electrode pieces. , A rotating member having a base that extends outward from the pedestal, an opening through which the pedestal of the rotating member is inserted, and a base of the rotating member pressed against the end surface of the lighting body And a ring member having an enlarged diameter portion to be held, and the rotation member is configured to include a rotation restricting mechanism for limiting the rotation member to the rotation range.

  The rotation restricting mechanism removes a rotation limiting claw protruding from one of the rotating member and the ring member toward the other and a part of the other so as not to interfere with the rotation limiting claw. And a notch for restricting the rotation range of the rotation member.

  Each of the base parts further includes a rotation positioning means for fixing the rotation position of the rotation member, and the rotation positioning means is directed from one of the base of the rotation member and the end surface of the illumination body toward the other. A combination of the protruding positioning protrusion and a plurality of positioning recesses formed on the same circumference on the other side may be configured to selectively fit the positioning protrusion into any of the plurality of positioning recesses.

  The positioning protrusion is formed at the tip of a notch protrusion formed on one of the base of the rotating member and the end surface of the lighting body, and when the rotating member is rotated, the notching protrusion is elastically deformed into a positioning protrusion. It is preferable that the elastic force be applied.

  In the present invention, the rotating member is held in pressure contact with the end surface of the illumination main body by the ring member, and the rotation limiting mechanism is provided on the rotating member and the ring member. Since this mechanism prevents the rotation member from rotating outside the rotation range, even if a lead wire is used for electrical connection between the electrode piece of the rotation member and the illumination body, the disconnection can be reliably prevented.

  If the rotation limiting mechanism is configured by combining the rotation limiting claw formed on one of the rotating member and the ring member and the rotation preventing groove formed on the other, the number of parts does not increase, so the product is low. Can be provided at a cost.

If the rotation positioning means is provided, the rotation positions can be easily matched on both sides of the lamp. After the adjustment, the rotation position is maintained and it is not easily displaced, so that the lamp can be cleaned easily.
Positioning projections that project from one of the base of the pivoting member and the end face of the illumination body toward the other and a plurality of positioning means that are formed on the same circumference on the other side to lock the positioning projections If the concave portion is combined, the number of parts does not increase, so that the product can be provided at low cost.

  If the positioning protrusion is formed on the tip of the notch protrusion formed on one of the base of the rotating member and the end surface of the lighting body, the positioning protrusion moves smoothly back and forth due to the elastic force and the pressing force. To do. Therefore, a click feeling can be given to the rotation adjustment, and the operability is improved.

(A)-(c) is the fragmentary perspective view of the lamp | ramp by this invention, a longitudinal cross-sectional view, and the exploded view of a nozzle | cap | die part, respectively. (A) is the partial side view (grounding side) of the lamp | ramp by this invention, (b)-(c) shows the state which rotated the nozzle | cap | die part to the standard position, +25 degrees, and -25 degrees, respectively. It is a front view. (A) is the fragmentary perspective view (electric power feeding side) of the lamp | ramp by this invention, (b) is the partial side view, (c) is a front view. (A)-(d) is each a rear view of the rotation member which comprises a nozzle | cap | die part, a side surface longitudinal cross-sectional view, a front view, and a side surface cross-sectional view. (A)-(c) is a back view, side longitudinal cross-sectional view, front view, and side cross-sectional view of the ring member which comprises a nozzle | cap | die part, respectively. (A)-(c) is each a rear view, side longitudinal cross-sectional view, front view, and side cross-sectional view of the end cap which comprises the end surface of an illumination main body. (A), (b) is each a side view of the whole nozzle | cap | die part, and a side surface longitudinal cross-sectional view. (A), (b) is a perspective view of the socket for earthing | grounding and the socket for electric power feeding with which the lamp | ramp by this invention is mounted | worn.

  Referring to FIGS. 1A to 1C, 2A, 2B, 3A, and 3B, first, the basics of the light source built-in lamp according to the present invention will be described. The configuration will be described. Here, FIGS. 1A to 1C, 2A, and 2B show a grounding cap portion 13A having a grounding electrode, and FIGS. b) shows a feeding base 13B provided with a feeding electrode. In these drawings, only one base part is shown, and the other base part is omitted. Further, in FIGS. 2A to 2D, for reference, the positioning concave portions and the positioning projections that are not visible in the state shown in the figure are shown by broken lines and black circles.

  Hereinafter, a light source built-in lamp having a base similar to the G13 base will be described as an example. However, the present invention can be applied to a light source built-in lamp including a base similar to the R17d base as it is.

  In the lamp 1, the substrate 11 on which the light emitting element 11a is mounted is accommodated in a tube forming the illumination main body 10 provided with the translucent cover 12, and the base portions 13 are rotatably attached to both end faces. Has a basic structure.

  The illumination body 10 is joined to a semi-cylindrical heat radiating member 14 having a semicircular cross section and a semi-cylindrical translucent cover 12 having a semicircular cross section facing each other, and an end cap 10a is provided on each end face. The fitting is fixed. As a result, a straight pipe is formed as a whole. The heat radiating member 14 is made of a metal such as an aluminum alloy. The substrate 11 is made of epoxy or the like, and is fixed to the heat radiating member 14 so that the light emitting element 11a faces the translucent cover 12 side. The translucent cover 12 is made of resin or the like, and when the lamp 1 is arranged at a predetermined height, the Fresnel lens pattern 12a is arranged in the longitudinal direction of the outer wall surface so as to have a light distribution characteristic that illuminates the floor surface well. Carved in streaks. The translucent cover 12 may be transparent or milky white, but the amount of the diffusing agent contained therein is determined in consideration of the light distribution characteristics.

  The light emitting element 11a is generally DC driven, but the lamp 1 itself can have a configuration corresponding to DC power supply or a configuration compatible with AC power supply. In the former case, a power supply circuit may be provided on the main body side of the lighting fixture (not shown), and in the latter case, a similar power supply circuit (not shown) may be built in the lamp 1. In this case, the power supply circuit is preferably arranged behind the substrate 11.

  The base part 13 is rotatably attached to the end caps 10a on both sides of the heat radiating member 14 by a mechanism described later. In this example, as shown in FIGS. 2B to 2D, the rotation can be adjusted to the standard position, + 25 °, and −25 °.

  As shown in FIG.1 (c), the nozzle | cap | die part 13 contains the rotation member 13a and the ring member 13b holding this rotation member 13a. The rotating member 13a has a substantially columnar pedestal portion 13aa provided with a pair of electrode rods 13c protruding from the end surface, and a base portion 13ab extending outward from the pedestal portion 13aa. The ring member 13b has a substantially annular shape, and the base portion 13ab is accommodated and held in pressure contact with the end cap 10a of the illumination body 10 with the base portion 13aa of the rotating member 13a inserted through the opening. The rotating member 13a, the ring member 13b, and the end cap 10a are all made of resin or the like.

  The rotation member 13a is formed with a receiving limit protrusion 13ac protruding from the vicinity of the electrode bar 13c. Specifically, the receiving limit protrusion 13ac of the grounding cap 13A has an elliptical shape having a long axis parallel to the width direction of the substrate 11, as shown in FIGS. 1 (a) and 2 (a). On the other hand, the receiving limit protrusion 13ac of the feeding base portion 13B is formed so as to have a spread, and a long axis perpendicular to the width direction of the substrate 11 is formed as shown in FIGS. 3 (a) and 3 (b). It is formed so as to have an elliptical spread with The base portion 13 provided with such a money receiving restriction projection 13ac does not fit into a money receiving portion without the receiving hole 21b corresponding to the money receiving restriction projection 13ac. That is, the money receiving restriction protrusion 13ac prevents the light source lamp from being erroneously attached to a lighting fixture or the like using a conventional fluorescent lamp.

  In addition, the shape of the receiving limit protrusion 13ac of the grounding base portion 13A is different from that of the receiving limit projection 13ac of the feeding base portion 13B, and the receiving portion 21 of the grounding socket 2A and the receiving power of the feeding socket 2B are different. If the receiving holes 21b corresponding to the respective portions 21 are formed, it is possible to prevent erroneous mounting of the light source built-in lamp in which the grounding side and the power feeding side are misplaced. In this embodiment, the money receiving restriction protrusion 13ac is provided on both of the base parts 13, but the present invention is not limited to this, and it may be provided on only one of them.

  The money receiving restriction protrusion 13ac may be formed so that it can be easily removed from the base part 13 by fingers or the like such as folding from the base or pulling out. By doing so, when a conventional lighting device for a fluorescent lamp or the like is modified so that the lamp 1 can be used, the lamp 1 from which the receiving limit protrusion 13ac is removed fits into the socket of the lighting device. , No need to change sockets.

  In addition, a receiving groove 13ag for receiving the cap restricting protrusion 21c provided in the socket 2 may be formed in at least one of the cap portions 13 in the rotating member 13a. Here, the receiving groove 13ag is formed only in the rotating member 13a of the power supply cap 13B. At this time, since the base part 21 of the corresponding socket 2 is provided with the base restricting ridge 21c, the base part 13 without the receiving groove 13ag for receiving the base restricting ridge 21c does not fit naturally. That is, the base restricting protrusion 21c prevents the conventional fluorescent lamp from being erroneously attached to a lighting fixture or the like using the lamp 1, and the receiving groove 13ag corresponding thereto is subject to the restriction. It is something to prevent. Further, in this embodiment, as described later, the cap restricting protrusion 21c is provided only in the power feeding socket 2B, and the receiving groove 13ag corresponding thereto is provided only in the power feeding cap portion 13B. It is possible to prevent the grounding cap portion 13A and the power feeding cap portion 13B from being erroneously mounted when being mounted on. Note that the number of receiving grooves 13ag may be different between a lamp corresponding to AC driving and a lamp (not shown) corresponding to DC driving. In the lamp corresponding to the AC driving exemplified here, the receiving groove 13ag is provided at two places. Therefore, in the lamp corresponding to the DC driving, for example, the receiving groove 13ag may be provided at one place.

  Next, a detailed configuration of the grounding base part 13 </ b> A for enabling the base part 13 to rotate around the axis of the illumination main body 10 will be described. The mechanism is the same for the power supply cap 13B.

  As shown in FIGS. 4A to 4D, the rotating member 13a has a substantially cylindrical shape in which the pedestal portion 13aa does not protrude outward from a predetermined cylindrical surface, and the base portion 13ab is around the opening of the pedestal portion 13aa. It spreads in a flange shape. An electrode bar 13c and a money receiving restriction protrusion 13ac protrude from the end face of the rotating member 13a.

  On the other hand, as shown in FIGS. 5A to 5C, the ring member 13b has a substantially annular shape having an opening 13bd. The diameter of the ring member 13b on the surface side is the diameter of the column, that is, the pedestal portion 13aa. The diameter is increased so as to match the maximum diameter and to accommodate the base portion 13ab of the rotating member 13a on the back surface side. Moreover, the thickness of this enlarged diameter part 13be is made equal to the thickness of base 13ab of the rotation member 13a.

  As shown in FIGS. 6A to 6C, the end cap 10a has a disk shape in which a lead wire insertion hole 10ae is formed at the center, and the main body is inserted into the body in the shape of dividing the cylinder vertically from the rear. Part 10aa protrudes. In the end cap 10a, the first stage of the disk formed in two stages is fitted into the end of the ring member 10a, and the second stage receives the end.

  Therefore, as shown in FIG. 1C, FIG. 7A, and FIG. 7B, the ring member 13b in which the base portion 13aa of the rotating member 13a is inserted from the back side is attached to the end cap 10a of the illumination body 10. If fixed by the screw 30, the base portion 13ab of the rotating member 13a is accommodated in the ring member 13b and pressed against the end cap 10a of the illumination body 10. However, since the base portion 13ab of the rotating member 13a is not fixed to the ring member 13b or the end cap 10a of the lighting body 10, the rotating member 13a can be applied to the pedestal portion 13aa by applying a rotational force exceeding the frictional force therebetween. Can rotate, and thereby the electrode rod 13c also rotates.

  In particular, in the present invention, in order to adjust the light distribution of the luminaire, the base portion 13 is pivotally adjusted with respect to the illumination body 10, so that the pivot range is ± 30 degrees from the standard position. Practical enough. If it is about that extent, the electrode rod 13c of the base part 13 and the substrate 11 in the illumination body 10 can be simply connected by a lead wire (not shown) without using a special conduction means such as a brush.

  As a means for preventing such a lead wire from breaking, here, a rotation limiting claw 13ba protruding in the center direction is formed on the inner peripheral edge of the ring member 13b, and in the rotation range of the rotation member 13a. In order not to interfere with the rotation restricting claw 13ba, a part of the base portion 13aa and the base portion 13ab of the rotation member 13a is removed to form a cutout portion 13ad. Here, the rotation restricting claw 13ba and the notch 13ad are provided at two locations facing each other.

  The rotation restricting claw 13ba on the ring member 13b side has a shape protruding in a tongue shape from the inner peripheral edge of the ring member 13b in the center direction when the ring member 13b is viewed in a plan view. It has a thickness. A screw hole 13bb for screwing the ring member 13b to the illumination body 10 is formed at the center. On the other hand, a screw hole 10ab is also formed in the end cap 10a of the illumination body 10.

  On the other hand, the notch portion 13ad on the rotating member 13a side prevents the base portion 13aa and the base portion 13ab from interfering with the rotation restricting claw 13ba when the rotating member 13a is rotated only in the rotation range. When viewed in a plan view, an intermediate portion of the notch 13ad is an arc having a central angle equal to the rotation range of the rotation member 13a. Such a rotation member 13a formed at two locations facing each other with the notch 13ad has a conical shape narrowed on both sides, and is suitable as a knob for performing a rotation operation. Note that the bisector of this arc coincides with a straight line connecting the two electrode rods 13c.

  If such a rotation restricting claw 13ba and the notch portion 13ad are combined, when the turning member 13a is turned to the limit, the rotation restricting claw 13ba hits the boundary surface of the notch portion 13ad, and further turns. Is prevented. Here, since the rotation restricting claw 13ba is screwed to the heat radiating member 14 together with the end cap 10a, the durable product that the rotation restricting claw 13ba is not easily damaged even if the turning member 13a is strongly turned. Is obtained.

  The rotation restricting claw 13ba and the notch 13ad are not limited to the above-described configuration, and the opposite arrangement, that is, the rotation restricting claw 13ba protruding outward from the pedestal 13aa of the rotation member 13a and the rotation member 13a. In order to prevent interference with the claw in the rotation range, a combination with a notch 13ad formed by removing a part of the inner peripheral edge of the ring member 13b may be used.

  Here, the rotation position of the rotation member 13a does not need to be freely adjustable, and can be selected from a plurality of positions prepared in advance. In addition, since it is necessary to make the rotational position coincide on both sides of the lamp 1 when the product is shipped or mounted on the socket, it is more convenient to select from a plurality of rotational positions. For example, if the rotation range is ± 25 ° from the standard position, selectable positions are standard, + 25 °, and −25 °, and are adjusted before mounting on the socket, and then the rotation is performed. A configuration that maintains the position is desirable.

  In order to select the rotation position in this way, three positioning recesses 13ae are formed on the same circumference on the back surface of the base portion 13ab of the rotation member 13a. That is, one positioning recess 13ae is prepared for each of the standard positions, + 25 ° and −25 °. A positioning projection 10ac that fits into any one of the positioning recesses 13ae is formed on the surface of the end cap 10a of the illumination body 10 in accordance with the rotational position of the rotational member 13a. That is, a plurality of positioning recesses 13ae corresponding to the respective rotation positions are formed on the back surface of the rotation member 13a that is rotated with respect to the illumination main body 10, and positioning is performed on the surface of the end cap 10a fixed to the illumination main body 10. By forming the protrusion 10ac and selectively fitting the positioning protrusion 10ac into any of the positioning recesses 13ae, the rotational position is specified. When the rotation position is standard, the two electrode rods 13 c are aligned in the width direction of the substrate 11.

  The positioning protrusion 10ac is desirably formed at the tip of the end cap 10a by providing a cutout protrusion 10ad having a tongue-like cutout profile when viewed in plan. Then, the positioning protrusion 10ac smoothly moves back and forth according to the elastic force and the pressing force of the notched protrusion 10ad. Therefore, the engagement strength between the positioning projection 10ac and the positioning recess 13ae, that is, the rotational force required to rotate the rotating member 13a can be freely set, and an appropriate click feeling can be given at the time of fitting. it can. When a plurality of sets of positioning recesses 13ae and positioning protrusions 10ac are provided, the cutout protrusions 10ad may be applied to only a part thereof. Further, the positioning protrusion 10ac may be formed on the back surface of the base portion 13ab of the rotating member 13a, and the positioning recess portion 13ae may be formed on the surface of the end cap 10a.

  As described above, the rotation position of the rotation member 13a is specified by the combination of the positioning protrusion 10ac and the positioning recess 13ae, and the rotation position is held. It becomes easy to make the rotation position of 13a correspond. Therefore, it is not necessary to readjust the rotational position many times when mounting the lamp 1 in the socket. Further, since the rotation position of the lamp 1 after being mounted on the socket does not easily change, cleaning of the lamp 1 and the like can be performed easily. In order to recognize the rotation position at a glance, the ring member 13b may be provided with a position gauge 13bc for each rotation position, and the rotation member 13a may be provided with a position mark 10af indicating the position scale.

  Note that the positioning protrusion 10ac and the positioning recess 13ae may be provided on the rotating member 13a and the ring member 13b, respectively. Moreover, the screw 20 which fixes the ring member 13b and the end cap 10a to the heat radiating member 14 (illuminating body 10) is loosened, the rotating member 13a is adjusted to an arbitrary rotating position, and then the screw 20 is tightened again. Thus, the rotating member 13a may be fixed. In these cases, the ring member 13b may be provided with a position gauge 13bc for each rotation position, and the rotation member 13a may be provided with a position mark 10af indicating the position scale.

  Hereinafter, for reference, the configuration of the socket in which the lamp 1 is mounted will be described with reference to FIGS. 8 (a) and 8 (b). The cap part 13 of the lamp 1 has two types of grounding and power supply as described above. Similarly, the socket 2 has two types of grounding and power supply. Needless to say, the grounding socket 2 </ b> A and the power feeding socket 2 </ b> B are used as a pair with respect to the lamp 1. That is, they are fixed and installed on the main body of the lighting fixture or the ceiling surface of the building with the receiving portion 21 facing each other at a distance suitable for the tube length of the lamp 1.

  As shown in FIG. 8A, the grounding socket 2 </ b> A has a leg portion 22 fixed to the lighting fixture body or the ceiling surface of the building, and a metal receiving portion 21 adapted to the grounding base portion 13 </ b> A of the lamp 1. With. That is, the grounding cap portion 13A includes an insulating metal receiving member 21d in which a pair of electrode holes 21a into which the electrode rod 13c is inserted and a pair of springs housed and fixed in the back of each of the electrode holes 21a. It consists of a type electrode (not shown). The spring-type electrode is like a tweezer with a reduced size, and is housed with the opening facing the opening of the electrode hole 21a. Then, the electrode rod 13c pushed between the portions corresponding to the blades is sandwiched by an elastic force to be electrically connected. Further, the grounding socket 2A is formed with a receiving hole 21b into which the money receiving restriction protrusion 13ac provided in the grounding base portion 13A is inserted. The receiving hole 21b has an elliptical shape like the receiving limit protrusion 13ac. Note that the grounding socket 2A is accommodated in the leg portion 22 in a state where the metal receiving member 21d receives an urging force in the forward direction by an elastic body (not shown), and the metal receiving member 21d is a leg when the lamp 1 is mounted. The lamp 22 is pushed into the back of the portion 22 and moved forward again to hold the lamp 1 after being mounted.

  On the other hand, as shown in FIG. 8B, the power supply socket 2B has basically the same structure as the grounding socket 2A, and is different in the following points. That is, the metal receiving member 21d constituting the metal receiving part 21 of the grounding socket 2B has a cap restricting protrusion in addition to the electrode hole 21a into which the electrode bar 13c is inserted and the receiving hole 21b into which the metal receiving restricting protrusion 13ac is inserted. A strip 21c is formed. The base limiting protrusion 21c extends upward (from the ceiling side) from near the center of the receiving member 21d. In addition, the power receiving socket 2B is fixed so that the metal receiving member 21d cannot move with respect to the leg portion 22.

DESCRIPTION OF SYMBOLS 1 Lamp 10 Illumination main body 10a End cap 10ac Positioning protrusion 10ad Notch protrusion 11a Light emission source 13 Base part 13a Rotating member 13aa Pedestal part 13ad Notch part 13ae Positioning recessed part 13ab Base part 13b Ring member 13ba Rotation restricting claw 13bd Opening diameter part 13bd 13c electrode rod

Claims (4)

In a straight tube type light source interior lamp having an illumination body in which a light source is installed and a pair of base parts rotatably provided on both end faces of the illumination body,
Each of the clasp parts
A rotating member having a pedestal portion provided with an electrode piece, and a base extending outward from the pedestal portion;
A ring member having an opening through which the pedestal portion of the rotating member is inserted, and a diameter-enlarged portion that holds the base portion of the rotating member in pressure contact with the end surface of the lighting body;
A straight tube type light-emitting source-incorporated lamp having a rotation regulating mechanism for limiting the rotation member to the rotation range. In claim 1,
The rotation restricting mechanism is
The rotation limiting claw that protrudes from one of the rotation member and the ring member toward the other, and a part of the other is removed so as not to interfere with the rotation limitation claw, and the rotation range of the rotation member A straight tube type light source built-in lamp combined with a notch that regulates the light. In claim 1 or 2,
Each of the cap parts further includes a rotation positioning means for fixing the rotation position of the rotation member,
This rotational positioning means is
The positioning projection is formed by combining a positioning projection protruding from one of the base of the rotating member and the end face of the lighting body toward the other and a plurality of positioning recesses formed on the same circumference on the other side. A straight tube type light source built-in lamp that is configured to be selectively fitted into any of the above. In claim 3,
The positioning protrusion is formed at the tip of a notch protrusion formed on one of the base of the rotating member and the end face of the lighting body. When the rotating member is rotated, the notching protrusion is elastically deformed to elastically move to the positioning protrusion. A straight tube type light source built-in lamp that is configured to apply force.

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