JP6583768B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device attached to a socket.

  Conventionally, incandescent bulbs and bulb-type fluorescent lamps having an E-shaped base have been used as residential lighting. In recent years, LED lighting devices using LED light sources are becoming widespread. For example, Patent Literature 1 discloses an LED lighting device including an E-shaped base.

JP 2012-230912 A

  When attaching the lighting device including the base to the socket, the user rotates the lighting device by holding the outer edge of the fixture body of the lighting device by hand. At this time, a large load (torque) is applied to the instrument body, and the base may be damaged.

  The present invention provides an illuminating device in which a base is not easily damaged when attached.

  An illumination device according to an aspect of the present invention is an illumination device that is attached to a socket by being rotated, and includes an instrument body provided with a light emitting portion on a light emission side, and the light emission side of the instrument body. A base provided on the opposite side, the base being screwed into the socket by the rotation, and a gripping part provided in a region including the center of the light emitting side of the instrument body. When viewed from the axial direction of movement, the outer shape of the grip portion is smaller than the outer shape of the instrument body.

  According to the present invention, an illuminating device in which the base is not easily damaged is realized.

FIG. 1 is a perspective view of the lighting apparatus according to Embodiment 1. FIG. FIG. 2 is an exploded perspective view of the lighting device according to Embodiment 1 as viewed from below. FIG. 3 is an exploded perspective view of the lighting device according to Embodiment 1 as viewed from above. FIG. 4 is a schematic cross-sectional view of the lighting device according to Embodiment 1 cut along a YZ plane. FIG. 5 is a conceptual diagram for explaining the force applied to the object. FIG. 6 is an external perspective view of the instrument body according to the first modification. FIG. 7 is a top view of the instrument body according to the first modification. FIG. 8 is a schematic cross-sectional view of a device main body according to Modification 1 (a schematic cross-sectional view of the device main body according to Modification 1 cut along line 8-8 in FIG. 7). FIG. 9 is an external perspective view of an instrument body having a grip portion provided with a convex portion. FIG. 10 is a schematic cross-sectional view of a lighting device according to Modification 2.

  Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings. Each figure is a schematic diagram and is not necessarily illustrated exactly.

  It should be noted that each of the embodiments described below shows a comprehensive or specific example. Numerical values, shapes, materials, components, and the like shown in the following embodiments are merely examples, and are not intended to limit the present invention. In addition, among the constituent elements in the following embodiments, constituent elements that are not described in the independent claims indicating the highest concept are described as optional constituent elements.

  Each figure is a mimetic diagram and is not necessarily illustrated strictly. In each figure, substantially the same configuration is denoted by the same reference numeral, and redundant description may be omitted or simplified.

(Embodiment 1)
First, the configuration of the lighting apparatus according to Embodiment 1 will be described in detail. FIG. 1 is an external perspective view of the lighting apparatus according to Embodiment 1. FIG. 2 is an exploded perspective view of the lighting device according to Embodiment 1 as viewed from below, and FIG. 3 is an exploded perspective view of the lighting device according to Embodiment 1 as viewed from above. FIG. 4 is a schematic cross-sectional view of the lighting device according to Embodiment 1 cut along a YZ plane. 1 to 3, the lamp axis J of the lighting device 10 (the central axis of the lighting device 10; hereinafter, also simply referred to as the axis J) is illustrated. 4 also shows a socket 80 to which the lighting device 10 according to the first embodiment is attached, and a ceiling surface 71 (the lower surface of the ceiling 70) that is an example of an installation surface on which the socket 80 is provided.

  In the following first embodiment, the Z-axis direction is, for example, the vertical direction, and the Z-axis + side may be described as the upper side (upward) or the installation surface side. Further, the Z-axis-side may be described as a lower side (downward) or a light emission side. The X-axis direction and the Y-axis direction are directions orthogonal to each other on a plane (horizontal plane) perpendicular to the Z-axis.

  As illustrated in FIGS. 1 to 4, the lighting device 10 includes a fixture body 20, a heat sink 25, a light emitting module 30, a cover 35, a base 40, and a frame body 50.

  The lighting device 10 is a ceiling light that is attached to the socket 80 by being rotated and mainly illuminates the lower part. Note that the axis of rotation when the lighting device 10 is attached to the socket 80 coincides with the lamp axis J. In the following embodiments, the axis of rotation is also referred to as axis J.

  Specifically, the lighting device 10 is attached to a socket 80 in which a base 40 is provided on the ceiling surface 71 with the cover 35 facing downward. The planar view shape (the shape seen from the direction of the axis J) of the illumination device 10 is a circle.

  The instrument body 20 is a flat, substantially cylindrical (substantially flat) member, and is attached to the socket 80 by being rotated about the axis J with the upper surface 22 (attachment surface) facing the ceiling surface 71. . The planar view shape of the instrument body 20 is a circle having a diameter of about 20 cm. The instrument body 20 is formed of a resin material such as PBT (polybutylene terephthalate), but may be formed of a metal material.

  A grip 60 is provided at the center of the lower surface 21 of the instrument body 20 (the surface on the light emission side shown in FIG. 2). The grip portion 60 is a portion that is gripped by the user when the lighting device 10 is attached to the socket 80, and is integrally formed with the instrument body 20 in the first embodiment.

  Further, a lead wire insertion hole 21 a (shown in FIG. 2) is provided on the lower surface 21 of the instrument body 20 and in the vicinity of the grip portion 60. A lead wire for electrically connecting the power circuit board accommodated in the instrument body 20 and the light emitting module 30 is inserted into the lead wire insertion hole 21a.

  A concave portion 23 that is recessed downward is provided at the central portion of the upper surface 22 (surface opposite to the light emitting side) of the instrument body 20. The planar view shape of the recess 23 is a circle having a smaller diameter than the instrument body 20. In the instrument main body 20, a convex portion 23 a that protrudes upward is provided at the center of the bottom surface that forms the concave portion 23. A base 40 is attached to the convex portion 23a.

  The side surface (outer peripheral surface) of the instrument body 20 is provided with a thread groove into which the frame body 50 is screwed. More specifically, the side surface of the instrument body 20 is intermittently provided with a ridge portion 24 composed of a plurality of protrusions that are long in the circumferential direction for forming a thread groove. The ridge portion 24 is divided into four portions and arranged at equal intervals in the circumferential direction of the side surface of the instrument body 20. The ridge portion 24 may be provided over the entire circumference on the side surface of the instrument body 20.

  Although not shown in the figure, a board (power supply circuit board) on which a power supply circuit (circuit parts constituting the power supply circuit) for supplying power to the light emitting module 30 is mounted is accommodated in the appliance body 20. That is, the instrument body 20 also functions as a housing that houses the power circuit board.

  The power circuit board converts AC power supplied via the base 40 into DC power for the light emitting module 30 to emit light. This direct current power is supplied to the light emitting module 30 (light emitting element 32) through a lead wire that is inserted into the lead wire insertion hole 21a and connects the power circuit board and the light emitting module 30.

  The heat sink 25 is an annular plate-shaped heat dissipation member, and is provided between the instrument main body 20 and the light emitting module 30. A gripper 60 is inserted into the circular opening 26 provided in the center of the heat sink 25, and the upper surface of the heat sink 25 abuts (surface contact) with the lower surface 21 of the instrument body 20. The heat sink 25 is formed of a metal member such as aluminum.

  A heat radiating member such as a heat radiating sheet or heat radiating grease may be provided between the upper surface of the heat sink 25 and the lower surface 21 of the appliance main body 20. An adhesive for bonding the heat sink 25 to the instrument body 20 may be provided between the upper surface of the heat sink 25 and the lower surface 21 of the instrument body 20.

  The light emitting module 30 includes a substrate 31 and a plurality of light emitting elements 32 mounted on the substrate 31. The light emitting module 30 is an example of a light emitting unit and functions as a light source of the illumination device 10.

  The substrate 31 is an annular plate-shaped substrate having a diameter smaller than that of the heat sink 25. The substrate 31 is provided between the heat sink 25 and the cover 35. The gripping portion 60 is inserted through the circular opening 33 provided in the center of the substrate 31. That is, the substrate 31 (the light emitting module 30) is provided so as to surround the grip portion 60 when viewed from the direction of the rotation axis J. For example, the substrate 31 is made of an electrically insulating material such as ceramic or heat conductive resin.

  The upper surface of the substrate 31 is in contact (surface contact) with the lower surface of the heat sink 25, and heat generated by light emission of the light emitting element 32 is conducted to the heat sink 25. A heat radiating member such as a heat radiating sheet or heat radiating grease may be provided between the upper surface of the substrate 31 and the lower surface of the heat sink 25. An adhesive for bonding the substrate 31 to the heat sink 25 may be provided between the upper surface of the substrate 31 and the lower surface of the heat sink 25.

  A metal film made of aluminum or copper is patterned on the lower surface of the substrate 31. Specifically, the metal film is a terminal portion 34 and wiring for supplying power to the light emitting element 32. In addition to the terminal portion 34 and the wiring, the metal film has a light reflecting metal film for efficiently emitting light emitted from the light emitting element 32 and heat emitted from the light emitting element 32 efficiently. A metal film for heat dissipation may be included. The metal film may also be provided on the upper surface of the substrate 31.

  The light emitting element 32 is a surface mount device (SMD type) LED element that emits white light, and a plurality of the light emitting elements 32 are provided on the lower surface of the substrate 31. The plurality of light emitting elements 32 are arranged in an annular shape on the lower surface of the substrate 31. The surface-mount LED element is a package-type LED element in which an LED chip is mounted in a resin-molded cavity and a phosphor-containing resin is enclosed in the cavity. The main light emission direction of each of the plurality of light emitting elements 32 is downward.

  A terminal portion 34 (shown in FIG. 2) for electrically connecting the light emitting module 30 and the above-described power supply circuit board is provided on the lower surface of the substrate 31, and the plurality of light emitting elements 32 are provided from the power supply circuit board. Light is emitted by DC power supplied through the terminal unit 34. In the first embodiment, the terminal portion 34 is, for example, a metal film (land) to which the lead wire inserted into the lead wire insertion hole 21a is soldered. However, the terminal portion 34 may be a connector (for example, female type) to which a lead wire with a connector (for example, male type) is detachably connected, and is not particularly limited.

  The cover 35 is a substantially circular dome-shaped optical member (glove) provided with a circular opening 36 in the center. The cover 35 has translucency, and covers the lower surface (light emission side) of the light emitting module 30 (substrate 31) in a state where the grip 60 is inserted through the opening 36. A plurality of claws 37 are provided on the inner edge portion of the cover 35, and the cover 35 is attached to the grip portion 60 (the instrument body 20) by engaging the claws 37 with the engagement portions 61 (recess portions) of the grip portion 60. .

  The cover 35 is formed of a translucent material such as silicone resin, acrylic resin, polycarbonate resin, and glass, for example. The cover 35 may be formed of a white resin containing a light diffusing material (fine particles) such as silica or calcium carbonate, and may have light diffusibility.

The base 40 is a power receiving unit that receives power for causing the light emitting module 30 (the light emitting element 32) to emit light from the socket 80. The base 40 is provided on the upper surface 22 (the side opposite to the light emitting side) of the instrument body 20. More specifically, the base 40 is attached to a convex portion 23 a provided in the concave portion 23 of the instrument body 20.

  The base 40 is specifically an E-type (Edison type) base, and the outer peripheral surface has a male screw shape. With such a structure, the base 40 is screwed into the socket 80. The base 40 is made of metal.

[Frame structure]
Next, the configuration of the frame 50 will be described. As shown in FIGS. 1 to 4, the frame 50 is attached to the instrument main body 20 and surrounds the end on the upper surface 22 side of the instrument main body 20 from the side. Member). The inner peripheral surface of the frame 50, and the screw groove 53 is formed over the entire periphery, the frame 50 is screw groove 53 is attached to the fixture body 20 by screwing to the ridge 2 4 above . That is, the frame body 50 is screwed into the thread groove formed by the ridge portion 24.

  As shown in FIG. 4, a part of the frame 50 is located closer to the ceiling surface 71 than the instrument body 20, and surrounds a space 81 between the upper surface 22 of the instrument body 20 and the ceiling surface 71 from the side. . The frame 50 can suppress the intrusion of dust into the space 81 and the recess 23, suppress the risk of ignition and the like caused by the intrusion of dust, and improve safety.

  In addition, as described above, the lighting device 10 is attached to the socket 80. Generally, the socket 80 is installed so as to protrude downward from the ceiling surface 71. For this reason, the space 81 is formed between the upper surface 22 of the instrument main body 20 and the ceiling surface 71, and the appearance is deteriorated.

  On the other hand, part of the frame 50 is located closer to the ceiling surface 71 than the instrument body 20, and surrounds and covers the space 81 between the upper surface 22 of the instrument body 20 and the ceiling surface 71 from the side. , Can improve the appearance (improve the design).

  Further, according to the configuration in which the frame 50 is screwed into the screw groove, the position of the frame 50 with respect to the instrument body 20 can be adjusted. By such position adjustment, as shown in FIG. 4, the frame body 50 (more specifically, the upper end of the frame body 50) is brought into contact with the ceiling surface 71 over the entire periphery, and the upper surface 22 of the instrument body 20 and the ceiling It is possible to surround the surface 71 without any gap. Thus, the effect which suppresses the penetration | invasion of dust by enclosing between the upper surface 22 of the instrument main body 20 and the ceiling surface 71 without a gap, and the effect which improves design property are high.

  Note that the frame body 50 does not necessarily need to contact the ceiling surface 71 over the entire circumference. A part of the frame 50 may be in contact with the ceiling surface 71. Even if the frame 50 is not in contact with the ceiling surface 71, at least a part of the frame body 50 only needs to be positioned closer to the ceiling surface 71 than the upper surface 22 of the instrument body 20. With such a configuration, it is possible to obtain a certain effect of suppressing the entry of dust or the like into the space 81 and the recess 23 and improving the design.

In the lighting device 10, in order to make the space 81 as small as possible, the base 40 is provided in the recess 23 of the instrument body 20, and the base 40 is entirely located in the recess 23. This also has the effect of suppressing the entry of dust and the like into the space 81 and the recess 23 and improving the design. Further, according to the configuration in which the base 40 is provided in the recess 23, the lighting device 10 can be thinned (the length (thickness) in the direction of the axis J is reduced). Note that at least a part of the base 40 may be positioned in the recess 23, and a part of the base 40 may be positioned closer to the ceiling surface 71 than the upper surface 22 of the instrument body 20. Even in such a case, it is possible to obtain a certain effect of suppressing the entry of dust and the like into the space 81 and the recess 23 and improving the design.

  In addition, the frame body 50 includes fixing portions 51 and 52 for fixing the frame body 50 to the ceiling 70 (ceiling surface 71). The fixing portion 51 is provided with a screw insertion hole 51a, and the fixing portion 52 is provided with a screw insertion hole 52a. As shown in FIG. 4, in the frame 50, a screw 91 inserted from below into the screw insertion hole 51a is screwed to the ceiling 70, and a screw 92 inserted from below into the screw insertion hole 52a is screwed to the ceiling 70. It is fixed to the ceiling 70 by being stopped.

  For example, the lighting device 10 may be attached to the socket 80 for the light bulb shaped lamp instead of the light bulb shaped lamp. However, the lighting device 10 tends to be heavier than the light bulb shaped lamp. In particular, the lighting device including the metal heat sink 25 like the lighting device 10 tends to be heavy. Therefore, the lighting device 10 attached to the socket 80 may fall off together with the socket 80.

  On the other hand, according to the fixing portions 51 and 52, a part of the weight of the lighting device 10 can be supported via the frame body 50, thereby reducing the risk of the lighting device 10 and the socket 80 dropping off. Can do.

  The method for fixing the frame 50 to the ceiling is not limited to the method using screws. The frame 50 may be fixed to the ceiling 70 with a fixing member other than a screw, such as a push rivet.

[Configuration of gripping part]
Next, the configuration of the gripper 60 will be described. The grip portion 60 is a substantially cylindrical portion provided in a region (region including the axis J) including the center of the lower surface 21 (light emission side) of the instrument body 20. In other words, the gripping portion 60 is a portion protruding downward in the central portion of the instrument body 20 on the lower surface 21 side. The gripping unit 60 is a part that the user grips to rotate the lighting device 10 when the lighting device 10 is attached to the socket 80.

  When viewed from the direction of the axis of rotation J when the lighting device 10 is attached, the outer shape of the grip portion is smaller than the outer shape of the instrument body 20. The effect obtained by such a configuration will be described with further reference to FIG. FIG. 5 is a conceptual diagram for explaining the force applied to the object.

  As shown in FIG. 5, the force F applied to the object at a position away from the rotation (rotation) center by a distance d is expressed as F = T / d using the torque T. When this equation is transformed, T = F × d.

  That is, in the lighting device 10, when the user grips the outer edge (outer peripheral portion) of the tool body 20 and rotates the lighting device 10, the distance d corresponding to the radius of the tool body 20 is applied to the force F applied by the user. Is applied to the instrument body 20. That is, even if the user rotates the lighting device 10 with a slight force F, a large torque T is applied to the fixture body 20. If it does so, it will become easy to produce breakage | damage of the nozzle | cap | die 40 (dropping of the nozzle | cap | die 40 from the instrument main body 20, etc.) for the reason of rotating the instrument main body 20 excessively with respect to the socket 80 at the time of attachment. In particular, as the outer shape of the instrument body 20 increases, the distance d in the above equation increases, and thus the base 40 is easily damaged.

  On the other hand, if the user grips the grip portion 60 and rotates the illumination device 10, the distance d of the above formula is larger than when the user grips the outer edge of the instrument body 20 and rotates the illumination device 10. Becomes smaller. Therefore, the torque T applied to the instrument body 20 is reduced, and damage to the base 40 can be suppressed.

  Hereinafter, the detailed configuration of the gripper 60 will be described. Two concave portions 62 having a substantially semicircular shape in plan view are provided on the lower surface of the grip portion 60. For example, the user inserts a thumb into one of the two recesses 62 and inserts an index finger into the other.

  Thus, if the recessed part 62 is provided, the user can rotate the illuminating device 10 easily by hooking a finger | toe to the recessed part 62. FIG. Moreover, when the recessed part 62 is provided in the holding part 60, the structure which does not protrude the holding part 60 below the cover 35 is easily realizable. That is, the lighting device 10 can be thinned (the length (thickness) in the direction of the axis J can be reduced), and the design of the lighting device 10 can be improved.

  Moreover, as FIG. 4 shows, the bottom face (the bottom face which forms the recessed part 62) of the recessed part 62 among the holding parts 60 contains a curved surface. Specifically, the boundary between the side surface of the recess 62 (the side wall surface where the recess 62 is formed) and the bottom surface of the recess 62 is a curved surface. According to such a curved surface, it is possible to improve the fit when the user puts a finger into the recess 62, and it is possible to further easily remove the lighting device 10 from the socket 80.

[Modification 1]
The form of the grip 60 as described above is an example. Hereinafter, as a first modification, a grip portion of another form will be described. FIG. 6 is an external perspective view of the instrument body according to the first modification. FIG. 7 is a top view of the instrument body according to the first modification. FIG. 8 is a schematic cross-sectional view of a device main body according to Modification 1 (a schematic cross-sectional view of the device main body according to Modification 1 cut along line 8-8 in FIG. 7). In the following description of the first modification, since the configuration is the same as that of the lighting device 10 except for the configuration of the instrument main body (gripping portion), the description is omitted.

  The grip part 60a of the instrument main body 20a according to Modification 1 shown in FIGS. 6 to 8 is different from the grip part 60 in the shape of the recess 62a. As shown in FIGS. 6 and 7, when viewed from the direction of the rotation axis J, the two recesses 62a are a pair of arches (arch-shaped) arranged so as to surround the rotation axis J. Groove). The two recesses 62 a have a symmetrical shape with respect to the axis J and are disposed at positions symmetrical with respect to the axis J. In other words, the two recesses 62 a are point symmetric with respect to the axis J.

  Similar to the gripper 60, also in the gripper 60a, the user's finger is inserted into the recess 62a. Considering that the user's finger is inserted, the width w of the recess 62a shown in FIG. 8 is preferably, for example, 10 mm or more and 20 mm or less.

  Further, as shown in FIG. 8, when the distance R from the rotation axis J to the outer edge of the instrument body 20a is not less than 75 mm and not more than 100 mm, the center in the width direction of the recess 62a from the rotation axis J The distance r is preferably 15 mm or more and 25 mm or less. That is, the distance r is preferably sufficiently small with respect to the distance R. Thereby, the torque added to the instrument main body 20a can fully be suppressed, and the nozzle | cap | die 40 can prevent the instrument main body 20a from being damaged more reliably.

  In addition, the shape of the recessed part 62 and the recessed part 62a demonstrated by said embodiment is an example, and the shape of a recessed part is not specifically limited.

  Moreover, a convex part may be provided in the holding part. FIG. 9 is an external perspective view of an instrument body having a grip portion provided with a convex portion.

  A convex portion 62b is provided on the grip portion 60b of the instrument body 20b shown in FIG. The planar view shape of the convex portion 62b is a race track shape, but may be another shape. There is no particular limitation.

  According to such a structure of the gripping portion 60b, the user can easily rotate the lighting device including the instrument main body 20b by pinching the convex portion 62b. Note that, in the lighting device using the instrument body 20 b, the gripping portion 60 b protrudes below the cover 35.

[Modification 2]
The form of the frame 50 as described above is an example. Hereinafter, as a second modification, a frame of another form will be described. FIG. 10 is a schematic cross-sectional view of a lighting device according to Modification 2. In the following description of the second modification, since the configuration is the same as that of the lighting device 10 except for the configuration of the frame body and the instrument body, the description is omitted.

  In the illumination device 10, the frame body 50 is screwed into the instrument body 20. On the other hand, in the lighting device 10c shown in FIG. 10, the attachment of the frame 50c to the instrument main body 20c is provided with the claw 54 provided on the inner peripheral surface of the frame 50c on the side surface of the instrument main body 20c. It is attached by hooking on the latching portion 24c. The locking part 24 c is provided with a plurality of locking grooves extending in the circumferential direction of the instrument body 20 c, and each locking groove has a shape corresponding to the claw 54.

  In attaching the frame 50c, the user pushes the frame 50c into the instrument main body 20c from below. Then, the claw 54 of the frame 50c bends and fits into the locking groove of the locking part 24c. In this state, since the claw 54 is caught by the locking portion 24c, the user cannot move the frame 50c downward. However, when the user further pushes the frame 50c upward from below, The nail | claw 54 bends and it fits into the latching groove located in 1 step | paragraph above the said latching groove.

  According to such a configuration, the user can easily fit the frame body 50c into the instrument body 20c by pushing the frame body 50c from below. Further, the vertical position of the frame 50c can be adjusted.

  In addition, although the nail | claw 54 is partially provided in the internal peripheral surface of the frame 50c, you may provide it over the perimeter. The same applies to the locking portion 24c, and the locking portion 24c may be provided partially on the side surface of the instrument body 20c or may be provided over the entire circumference.

(Other embodiments)
Although the lighting device according to the embodiment has been described above, the present invention is not limited to such an embodiment.

  For example, in the said embodiment, although the illuminating device 10 was attached to the ceiling surface 71, the ceiling surface 71 is an example of an installation surface. The illuminating device 10 may be attached to the surface of other structures, such as a wall surface, for example.

  Moreover, in the said embodiment, the illuminating device 10 was demonstrated as a ceiling light. However, the grip portion of the above embodiment can be applied to an illumination device other than a ceiling light that is attached by turning. For example, the present invention can also be applied to an illumination light source (for example, a light bulb shaped lamp, a light engine for downlight use) that is attached by rotation. Moreover, the frame body of the said embodiment is applicable also to the other illuminating device attached to an installation surface.

  Moreover, in the said embodiment, although the SMD type light emitting module 30 was used as an example of a light emission part, the aspect of a light emission part is not specifically limited. For example, a COB (Chip On Board) type light emitting module in which an LED chip is directly mounted on the substrate 31 may be used as the light emitting unit. Moreover, the light emitting module comprised using solid light emitting elements other than LED, such as an organic EL element (OLED) or an inorganic EL element instead of the light emitting module 30, may be used as a light emission part.

  As mentioned above, although the illuminating device which concerns on one or several aspects was demonstrated based on embodiment, this invention is not limited to this embodiment. Unless it deviates from the gist of the present invention, various modifications conceived by those skilled in the art have been made in this embodiment, and forms constructed by combining components in different embodiments are also within the scope of one or more aspects. May be included.

10, 10c Lighting device 20, 20a, 20b, 20c Instrument body 30 Light emitting module (light emitting unit)
40 Base 60, 60a, 60b Holding part 62, 62a Concave part 62b Convex part 80 Socket

Claims (9)

A lighting device attached to the socket by being rotated,
An instrument body provided with a light emitting part on the light emitting side, and provided with a first recess on the opposite side of the light emitting side;
A base at least partially located in the first recess, the base screwed into the socket by the rotation ;
A grip portion provided in a region including the center of the light emission side of the instrument body ,
When viewed from the axial direction of rotation, the illumination device has an outer shape that is smaller than the outer shape of the instrument body . The lighting device according to claim 1 , wherein the grip portion is provided with a second recess. The grip portion is provided with two second recesses,
The lighting device according to claim 2 , wherein the two concave portions have a pair of arch shapes arranged so as to surround the pivot shaft when viewed from the pivot axis direction. When viewed from the axial direction of the rotation,
The distance from the pivot axis to the end of the outer edge of the instrument body is 75 mm or more and 100 mm or less,
The lighting device according to claim 3 , wherein a distance from the axis of rotation to the center in the width direction of the second recess is 15 mm or more and 25 mm or less. The lighting device according to claim 2 , wherein a bottom surface of the second recess includes a curved surface. Wherein the gripper lighting device of claim 1 in which the convex portion is provided. The illumination device according to any one of claims 1 to 6 , wherein the light emitting unit is provided so as to surround the gripping unit when viewed from an axial direction of the rotation. The spinneret lighting device according to any one of claims 1 to 7, which is E-shaped cap. The lighting device according to any one of claims 1 to 8 , wherein the base is entirely located in the first recess.

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