JP2024166350A - Lighting fixtures - Google Patents

Abstract

To improve workability of fitting work of a seal member.SOLUTION: A luminaire A1 comprises: a light source unit comprising an LED; an appliance body 1 formed in a cylindrical shape, and houses the light source unit; and a seal member 6 sealing a gap between the appliance body 1 and the light source unit. The seal member 6 comprises a first contact part in contact with the appliance body 1, a second contact part in contact with the light source unit, one or more protrusion parts 63 protruding toward the appliance body 1 from the first contact part, and one or more fitting tools 8 for fitting the appliance body 1 to a building material. The appliance body 1 comprises one or more insertion holes 13 into which the protrusion parts 63 are inserted. The protrusion parts 63 comprise hook claws 64 hooked on edges of the insertion holes 13 in the appliance body 1. The fitting tools 8 are fitted to fitting parts 12 provided in the appliance body 1. The protrusion parts 63 is prevented from being pulled out with respect to the insertion holes 13 by the fitting tools 8 fitted to the fitting parts 12.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a lighting fixture, and more specifically, to a lighting fixture having a sealing member.

As an example of a conventional lighting fixture, the lighting fixture described in Patent Document 1 is given. The lighting fixture described in Patent Document 1 (hereinafter referred to as the conventional example) is a so-called downlight. The conventional example comprises a lighting fixture body that holds an LED module, and a power supply unit that is disposed on top of the lighting fixture body and turns on the LED module. The conventional example is attached to a building material such as a ceiling board by embedding the power supply unit and most of the lighting fixture body in an embedding hole provided in the building material.

In addition to the LED module, the lamp body has a pair of mounting springs, an LED holder, a first reflector, a shade, an O-ring, and a second reflector. The O-ring is formed, for example, from a synthetic rubber sheet material, and is positioned so as to be interposed between the inner periphery of the second reflector and the periphery of the shade. The O-ring ensures airtightness of the indoor space by suppressing air flow between the second reflector and the shade.

JP 2015-210880 A

The O-ring (sealing member) in the above conventional example is formed in a circular ring shape and is inserted into a circular groove provided in the second reflector, and is attached to the lamp body by attaching the shade to the second reflector via the first reflector.

On the other hand, with the above conventional structure, it was difficult to improve the workability of installing the O-ring (sealing member).

The objective of this disclosure is to provide a lighting fixture that can improve the workability of installing a sealing member.

A lighting fixture according to one aspect of the present disclosure includes a light source unit having a light source, a fixture body formed in a cylindrical shape to house the light source unit, and a seal member that seals a gap between the fixture body and the light source unit. The seal member has a first contact portion that contacts the fixture body, a second contact portion that contacts the light source unit, one or more protrusions that protrude from the first contact portion toward the fixture body, and one or more mounting fixtures for attaching the fixture body to a construction material. The fixture body has one or more insertion holes through which the protrusions are inserted. The protrusions have hooks that hook onto the edges of the insertion holes in the fixture body. The mounting fixture is attached to an attachment portion provided on the fixture body. The protrusions are prevented from falling out of the insertion holes by the attachment fixture attached to the attachment portion.

The lighting fixture disclosed herein has the advantage of improving the workability of installing the sealing member.

FIG. 1 is a perspective view of a lighting fixture according to an embodiment of the present disclosure, viewed obliquely from below. FIG. 2 is a perspective view of the lighting fixture as viewed obliquely from above. FIG. 3 is an exploded perspective view of the above lighting fixture. FIG. 4 is a half cross-sectional view of the above lighting fixture. FIG. 5 is an exploded perspective view of a lamp body in the above lighting fixture. Fig. 6A is a front view of the sealing member in the lighting fixture of the same, Fig. 6B is a bottom view of the sealing member of the same, Fig. 6C is a right side view of the sealing member of the same, and Fig. 6D is a cross-sectional view taken along line X1-X1 of Fig. 6A. FIG. 7 is a cross-sectional view of the above lighting fixture with some parts omitted. FIG. 8 is a perspective view of a modified example of the seal member in the lighting fixture. FIG. 9 is a cross-sectional view of a modification of the above seal member, with some parts omitted.

The lighting device according to the embodiment of the present disclosure will be described in detail below with reference to the drawings. However, each figure described in the following embodiment is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. Note that the configuration described in the following embodiment is merely one example of the present disclosure. The present disclosure is not limited to the following embodiment, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

(1) Overview of the Lighting Device According to the Embodiment The lighting device A1 according to the embodiment includes a light source unit 3 having a light source (LED 30), a device body 1 formed in a cylindrical shape to house the light source unit 3, and a sealing member 6 that seals the gap between the device body 1 and the light source unit 3.

The sealing member 6 has a first contact portion 61 that contacts the device body 1, a second contact portion 62 that contacts the light source unit 3, and one or more protrusions 63 that protrude from the first contact portion 61 toward the device body 1.

The device body 1 has one or more insertion holes 13 through which the protrusions 63 are inserted. The protrusions 63 have hooks 64 that hook onto the edges of the insertion holes 13 in the device body 1.

In the lighting fixture A1 according to the embodiment, the seal member 6 is attached to the fixture body 1 by inserting the protrusion 63 into the insertion hole 13 provided in the fixture body 1 and hooking the hook 64 of the protrusion 63 onto the edge of the insertion hole 13 in the fixture body 1. In other words, the lighting fixture A1 according to the embodiment can be attached to the fixture body 1 by the seal member 6 alone without using another member, thereby improving the workability of attaching the seal member 6.

(2) Details of the Lighting Fixture According to the Embodiment The lighting fixture A1 according to the embodiment (hereinafter, abbreviated as lighting fixture A1) is a downlight that is disposed so as to be embedded in an indoor ceiling of, for example, a commercial facility, a hospital, a care facility, an accommodation facility, etc. As shown in Figs. 1 to 4, the lighting fixture A1 includes a fixture body 1, a light body 2, a seal member 6, a holding member 7, and three mounting fixtures 8.

(2-1) Instrument Body The instrument body 1 has a cylindrical portion 10 having a bottom and a ring-shaped frame portion 11 that protrudes outward from the lower end of the cylindrical portion 10 around the entire circumference of the lower end of the cylindrical portion 10. The cylindrical portion 10 and the frame portion 11 are integrally formed, for example, by drawing a metal plate material. However, the cylindrical portion 10 and the frame portion 11 may be formed separately and then joined together by an appropriate method such as welding.

A circular opening 14 is provided at the bottom of the cylindrical portion 10 (see FIG. 4). Three protrusions 15 are provided on the periphery of the upper surface of the bottom of the cylindrical portion 10 (see FIG. 2). Each protrusion 15 is formed in an arc shape. The three protrusions 15 are arranged at equal intervals along the circumferential direction of the bottom of the cylindrical portion 10.

Three mounting parts 12 are provided on the circumferential surface (side surface) of the cylindrical part 10 (see FIG. 2). Each mounting part 12 has a pair of insertion pieces 120 and a locking groove 121. The pair of insertion pieces 120 are formed in a hook shape (L-shape) when viewed in the axial direction (up-down direction) of the cylindrical part 10. The pair of insertion pieces 120 face each other with a gap between them along the circumferential direction of the cylindrical part 10. The pair of insertion pieces 120 are formed by cutting out a part of the cylindrical part 10 (see FIG. 2).

The locking groove 121 of each mounting portion 12 is provided between a pair of insertion pieces 120 on the circumferential surface of the cylindrical portion 10 (see FIG. 2). The locking groove 121 is formed in a rectangular shape by cutting and raising a part of the cylindrical portion 10 toward the inside of the cylindrical portion 10 (see FIG. 2).

(2-2) Light Body The light body 2 has a light source unit 3 and a support block 4. The light body 2 is housed in the fixture main body 1 (see Figs. 3 and 4).

(2-2-1) Light Source Unit The light source unit 3 includes an LED 30, a lens 31, a holder 32, a lens cover 33, and a unit body 34 (see Figs. 3 to 5). The LED 30 is a COB (Chip on Board) type white LED for illumination. The light emitting surface of the LED 30 (the surface from which illumination light is emitted) is formed in a circular shape.

The lens 31 has a disk-shaped base 310, a number of cylindrical lenses 311 formed on one surface (top surface) of the base 310, and a Fresnel lens 312 formed on the other surface (bottom surface) of the base 310. The multiple cylindrical lenses 311 are arranged in a line so that their axes are parallel (see Figure 4).

The holder 32 holds the LED 30 and the lens 31. The holder 32 has a cylindrical peripheral wall 320, a truncated cone-shaped bottom wall 321 protruding upward from the inner peripheral surface of the peripheral wall 320, a mounting base 322 protruding in a truncated cone shape from the center of the bottom wall 321, and a wiring section 323 (see Figures 4 and 5). The peripheral wall 320, the bottom wall 321, the mounting base 322, and the wiring section 323 are integrally formed as a molded body of a synthetic resin material such as polybutylene terephthalate. The LED 30 is supported by the holder 32 so as to cover the window 3220 opening on the upper surface of the mounting base 322. The lens 31 is supported by the holder 32 so as to cover the opening at the lower end of the peripheral wall 320. The wiring section 323 holds the three electric wires (positive electric wire, negative electric wire, and ground wire) of the power cable C1. These three wires are electrically connected to the LED 30 inside the holder 32.

The unit body 34 is made of a metal material and has a cylindrical shape with a bottom. A part of the holder 32 (bottom wall 321 and mounting base 322) and the LED 30 are housed inside the unit body 34. A base 340 that protrudes toward the inside of the unit body 34 is provided at the center of the bottom surface (top surface) of the unit body 34. The base 340 contacts the back surface of the LED 30 held by the holder 32. In other words, the heat generated by the LED 30 is conducted from the base 340 to the entire unit body 34 and dissipated. In addition, an insertion hole 341 through which a part of the wiring part 323 of the holder 32 is inserted is provided at the end of the bottom surface of the unit body 34 (see FIG. 5). The unit body 34 and the holder 32 are joined by screwing.

The lens cover 33 forms the outer shell of the light source unit 3. The lens cover 33 has a main portion 330, an edge portion 331, a rib 332, a reflecting portion 333, and a pair of bosses 334. The main portion 330, the edge portion 331, the rib 332, the reflecting portion 333, and the pair of bosses 334 are integrally formed as a molded body of a synthetic resin material.

The main part 330 is formed in a shape obtained by cutting out a portion of a spherical shell between a first plane including the center of the spherical shell and a second plane parallel to the first plane. In other words, the outer peripheral surface of the main part 330 is a spherical surface. The edge part 331 is formed in a shape combining a part of a ring and a truncated cone, and is connected to the lower end of the main part 330. The reflecting part 333 is formed in a truncated cone shape and protrudes upward from the lower end of the edge part 331 and toward the inside of the edge part 331. The rib 332 is formed in a shape obtained by cutting out a cylinder with a plane inclined to the axis, and protrudes upward from the upper end of the main part 330. The pair of bosses 334 are each formed in a cylindrical shape and are formed integrally with the main part 330 so as to extend upward along the inner peripheral surface of the edge part 331. The pair of bosses 334 are arranged in opposing positions across the reflecting part 333.

(2-2-2) Support Block The support block 4 has a fixed member 40, a first movable member 41, a second movable member 42, and four shaft portions 43 (see FIG. 5).

The fixing member 40 has a rectangular fixing piece 400 and a pair of support pieces 401 that rise from both ends of the longitudinal direction of the fixing piece 400 in the thickness direction (upward) of the fixing piece 400. Each of the pair of support pieces 401 is provided with an internal thread 402. The fixing piece 400 and the pair of support pieces 401 are integrally formed into a U-shape by bending a single rectangular metal plate.

The fixing member 40 is fixed to the unit body 34 by screwing the fixing piece 400 to the top surface of the unit body 34 with two mounting screws 404. In addition, a screw insertion hole 403 is provided at each end of the longitudinal direction of the fixing piece 400. Then, a fixing screw 44 consisting of a tapping screw is inserted into each of the two screw insertion holes 403. These two fixing screws 44 are screwed into two bosses 334 of the lens cover 33 one by one through holes (not shown) provided in the bottom surface of the unit body 34. In other words, the fixing member 40 is also fixed to the lens cover 33.

The first movable member 41 has a first main piece 410, a pair of first leg pieces 411, and a pair of second leg pieces 412. The first main piece 410 is formed in a rectangular flat plate shape. The pair of first leg pieces 411 are each formed in a rectangular flat plate shape and hang down from both ends of the first main piece 410 in the thickness direction (downward) of the first main piece 410 in the longitudinal direction. The pair of second leg pieces 412 are formed in a rectangular flat plate shape and hang down from both ends of the first main piece 410 in the thickness direction (downward) of the first main piece 410 in the lateral direction. The first main piece 410, the pair of first leg pieces 411, and the pair of second leg pieces 412 are integrally formed by bending a single rectangular metal plate.

A rectangular insertion groove 414 is provided at the center of the first main piece 410 in the longitudinal direction and at both ends of the first main piece 410 in the lateral direction. Each first leg piece 411 is provided with a circular first shaft hole 413. Each second leg piece 412 is provided with a circular second shaft hole 415.

The first movable member 41 is attached to the fixed member 40 so as to be able to swing by two shafts 43. Each shaft 43 is composed of a stepped screw 430, a flat washer 431, and a corrugated washer 432. The pair of first legs 411 of the first movable member 41 are respectively arranged outside the pair of support pieces 401 of the fixed member 40. The stepped screw 430 of the shaft 43 is inserted into the first shaft hole 413 of the first leg piece 411 via the corrugated washer 432 and the flat washer 431, and is screwed into the female thread 402 of the support piece 401. Here, the cylindrical portion 4300 of the stepped screw 430 is fitted into the first shaft hole 413, so that the first movable member 41 is attached to the fixed member 40 so as to be able to swing about the cylindrical portion 4300 of the stepped screw 430 as an axis.

The second movable member 42 has a second main piece 420 formed in a rectangular flat plate shape, and a pair of third leg pieces 421 formed in a rectangular flat plate shape and extending downward from both ends of the second main piece 420 in the thickness direction (downward) of the second main piece 420. The second main piece 420 and the pair of third leg pieces 421 are integrally formed by bending a single rectangular metal plate. A circular screw insertion hole 423 is provided at one end of the second main piece 420 in the longitudinal direction. A female screw 422 is provided at the lower end of each of the third leg pieces 421.

The second movable member 42 is attached to the first movable member 41 so as to be able to swing with the two shafts 43. The pair of third leg pieces 421 of the second movable member 42 are inserted one by one into a pair of insertion grooves 414 provided in the first main piece 410 of the first movable member 41, and are arranged inside the pair of second leg pieces 412 of the first movable member 41. The stepped screw 430 of the shaft 43 is inserted into the second shaft hole 415 of the second leg piece 412 via the corrugated washer 432 and the flat washer 431, and is screwed into the female thread 422 of the third leg piece 421. Here, the cylindrical portion 4300 of the stepped screw 430 is fitted into the second shaft hole 415, so that the second movable member 42 is attached to the first movable member 41 so as to be able to swing with the cylindrical portion 4300 of the stepped screw 430 as an axis.

(2-3) Holding Member The holding member 7 rotatably holds the support block 4 (lamp body 2) relative to the fixture body 1. The holding member 7 has a holding plate 70, three pressing portions 71, and a fixing screw 72, as shown in Figs.

The retaining plate 70 is formed into a disk shape from a metal plate material. A rectangular insertion hole 701 is provided in the center of the retaining plate 70. A female screw 700 is provided on the periphery of the retaining plate 70 at a position adjacent to the insertion hole 701 along the longitudinal direction of the insertion hole 701. Furthermore, a circular cable insertion hole 702 is provided at a position adjacent to the insertion hole 701 along the lateral direction of the insertion hole 701 of the retaining plate 70.

The second main piece 420 of the second movable member 42 is inserted into the insertion hole 701 of the holding plate 70 from below the holding plate 70. Then, the fixing screw 72 is inserted into the screw insertion hole 423 of the second main piece 420 arranged on the holding plate 70, and the fixing screw 72 is screwed into the internal thread 402 of the holding plate 70. As a result, the holding plate 70 and the support block 4 are joined by screwing (see Figures 2 and 4).

The retaining plate 70 is attached to the upper surface of the cylindrical portion 10 of the instrument body 1 by being pressed by three pressing portions 71. Each of the three pressing portions 71 is composed of a shoulder screw 710 and a flat washer 711. The shoulder screw 710 is screwed into a threaded hole provided near the abutment portion 15 on the upper surface of the cylindrical portion 10 via the flat washer 711. However, a gap of the height of the abutment portion 15 is created between the upper surface of the cylindrical portion 10 and the lower surface of the flat washer 711. The peripheral portion of the retaining plate 70 is sandwiched in the gap between the upper surface of the cylindrical portion 10 and the lower surface of the flat washer 711, so that the retaining plate 70 is rotatably attached to the upper surface of the cylindrical portion 10 of the instrument body 1 (see Figures 2 to 4).

Here, three hemispherical positioning protrusions 16 are provided at equal intervals on the upper surface of the cylindrical portion 10, concentrically with the three screw holes for the shoulder screws 710. These three positioning protrusions 16 can suppress misalignment between the center of the holding plate 70 and the center of the upper surface of the cylindrical portion 10 (see Figs. 2 to 4). A power cable C1 is inserted through the cable insertion hole 702 of the holding plate 70. One end of the power cable C1 is electrically connected to the wiring portion 323 of the light source unit 3. The other end of the power cable C1 is electrically connected to a power supply unit (not shown).

(2-4) Fixtures The lighting fixture A1 includes three fixtures 8. However, all three fixtures 8 have the same configuration.

As shown in FIG. 2, the mounting fixture 8 has a spring piece 80, an attachment piece 81, a retaining piece 82, a locking claw 83, and a pair of reinforcing parts 84. The spring piece 80, the attachment piece 81, the retaining piece 82, the locking claw 83, and the pair of reinforcing parts 84 are integrally formed from a metal suitable for the spring material, such as stainless steel.

The spring piece 80 is formed in a long strip shape. The mounting piece 81 is formed in a rectangular shape. The retaining piece 82 is formed in a rectangular shape narrower than the mounting piece 81, and is connected to the mounting piece 81 and the spring piece 80. However, the lower end of the retaining piece 82 connected to the spring piece 80 is curved in a U-shape. The lock claw 83 is formed in a hook shape by cutting out a part of the mounting piece 81. The pair of reinforcing parts 84 are formed in a long bathtub shape by drawing a part of the mounting piece 81 and the retaining piece 82. The pair of reinforcing parts 84 suppress deformation along the thickness direction of the mounting piece 81 and the retaining piece 82.

(2-5) Sealing Member The sealing member 6 has a first contact portion 61, a second contact portion 62, six protrusions 63, six hooking claws 64, a non-contact portion 65, and a flange portion 66 (see FIG. 6). The first contact portion 61, the second contact portion 62, the six protrusions 63, the six hooking claws 64, the non-contact portion 65, and the flange portion 66 are integrally formed from a flexible synthetic resin material such as silicone resin.

The first contact portion 61 is formed in a cylindrical shape. The flange portion 66 is formed in an annular shape and protrudes outward from the lower end of the first contact portion 61. The non-contact portion 65 is formed in a truncated cone shape and is connected to the upper end of the first contact portion 61, protruding upward from the upper end of the first contact portion 61. The second contact portion 62 is formed in an annular shape and protrudes inward from the upper end of the non-contact portion 65. The thickness of the non-contact portion 65 is greater than the thickness of each of the first contact portion 61 and the second contact portion 62 (see FIG. 6D).

Each of the six protrusions 63 is formed in a quadrangular prism shape. Each protrusion 63 has one triangular prism-shaped hook claw 64. Each of the six protrusions 63 protrudes outward from the outer circumferential surface of the first contact portion 61 along the thickness direction of the first contact portion 61. However, the six protrusions 63 are arranged in pairs at equal intervals along the circumferential direction of the first contact portion 61.

The pair of protrusions 63 are arranged adjacent to each other along the circumferential direction of the first contact portion 61 at an interval narrower than the width of the mounting piece 81 of the mounting fixture 8 and wider than the width of the retaining piece 82. In addition, the hook claws 64 of each of the pair of protrusions 63 protrude outward from the surface opposite the surface (hereinafter sometimes referred to as the opposing surface) that each of the protrusions 63 faces along the circumferential direction of the first contact portion 61. Furthermore, the opposing surfaces of each of the pair of protrusions 63 are inclined upward in a direction away from each other (see FIG. 6C). Here, the opening angle α of the opposing surfaces of the pair of protrusions 63 is approximately 26 degrees.

(3) Assembly Procedure of the Lighting Fixture According to the Embodiment Next, an assembly procedure of the lighting fixture A1 will be described. However, in the following description, a procedure for attaching the seal member 6 and the mounting fixture 8 to the fixture body 1 to which the light body 2 and the holding member 7 are attached will be described.

First, the worker inserts the seal member 6 into the cylindrical portion 10 of the device body 1. Then, the worker pinches a pair of protrusions 63 with his fingers from the inner circumferential surface of the first contact portion 61, and displaces the pair of protrusions 63 in a direction that brings them closer to each other. The worker inserts the pair of protrusions 63 that have been pinched and displaced into each of the pair of insertion holes 13 of the cylindrical portion 10, one by one. Then, when the worker releases his fingers from the pair of protrusions 63, the hook claws 64 of each of the pair of protrusions 63 hook onto the outer edges of the pair of insertion holes 13 (see FIG. 7). The worker then hooks the hook claws 64 of the remaining two pairs of protrusions 63 onto the outer edges of the insertion holes 13 in the same manner. As a result, the seal member 6 is attached to the fixture body 1 (the cylindrical portion 10) by hooking the six hook claws 64 onto the edges of the six insertion holes 13 in the cylindrical portion 10 of the fixture body 1. When the seal member 6 is attached to the fixture body 1, a part of the lamp body 2 (the lens cover 33) is inserted into the opening of the second contact portion 62 of the seal member 6 (see FIG. 4).

The worker then attaches the three mounting fixtures 8 to the three mounting sections 12 of the instrument body 1, one by one. The worker inserts the retaining piece 82 of the mounting fixture 8 between the pair of insertion pieces 120 of the mounting section 12 from top to bottom along the outer circumferential surface of the cylindrical section 10 and between the pair of protrusions 63. At this time, since the opposing surfaces of the pair of protrusions 63 are inclined upward and away from each other, it is easy for the worker to insert the retaining piece 82 between the pair of protrusions 63.

When an operator inserts the retaining piece 82 between a pair of protrusions 63, the mounting piece 81 of the mounting tool 8 is inserted into the space between a pair of insertion pieces 120 of the mounting section 12 and the outer circumferential surface of the cylindrical section 10, and the mounting piece 81 is supported by the pair of insertion pieces 120. Furthermore, when the locking claw 83 of the mounting tool 8 is inserted into the locking groove 121 of the mounting section 12, the mounting piece 81 is prohibited from moving upward, and the mounting of the mounting tool 8 to the mounting section 12 of the appliance body 1 is completed.

(4) Features of the Lighting Fixture According to the Embodiment As described above, in the lighting fixture A1, in the process of attaching the seal member 6 to the fixture body 1, the seal member 6 can be attached to the fixture body 1 without using any other member other than the seal member 6. Therefore, the lighting fixture A1 can improve the workability of the attachment process of the seal member 6.

When the mounting fixture 8 is attached to the mounting portion 12 of the device body 1, the retaining pieces 82 of the mounting fixture 8 are disposed between the pair of protrusions 63, and a portion of a pair of insertion holes 13 in the cylindrical portion 10 is blocked by the retaining pieces 82 (see FIG. 7). The "portion of the insertion hole 13" refers to the portion of the insertion hole 13 where the protrusions 63 are not present when the hook claws 64 are hooked on the edge of the insertion hole 13 (see FIG. 2).

When the mounting fixture 8 is attached to the mounting portion 12 of the fixture body 1, a portion of the insertion hole 13 is blocked by the retaining piece 82, so the protrusion 63 cannot move in a direction that moves the hook claw 64 away from the edge of the insertion hole 13. In other words, the lighting fixture A1 can prevent the hook claw 64 from coming off the edge of the insertion hole 13 without using any other member other than the mounting fixture 8. As a result, the lighting fixture A1 can further improve the ease of installation of the sealing member 6.

When the seal member 6 is attached to the fixture body 1, the seal member 6 seals the gap between the opening on the bottom surface of the cylindrical portion 10 and the lamp body 2. Specifically, the first contact portion 61 of the seal member 6 contacts the inner circumferential surface of the cylindrical portion 10, and the second contact portion 62 of the seal member 6 contacts the lens cover 33 of the lamp body 2.

The lamp body 2 is configured to be rotatable and swingable relative to the fixture body 1. In other words, when the lamp body 2 rotates or swings relative to the fixture body 1, the lens cover 33 slides against the second contact portion 62 of the seal member 6, but the frictional force acting between the lens cover 33 and the second contact portion 62 is kept almost constant.

In other words, the axis of rotation of the light body 2 overlaps with the center of the main part 330 of the lens cover 33, which has a circular shape when viewed in the axial direction (up and down) of the rotation (see FIG. 4), so the distance from the axis of rotation to the outer circumferential surface of the main part 330 remains approximately constant even when the light body 2 rotates. Therefore, the frictional force acting between the lens cover 33 and the second contact part 62 when the light body 2 rotates remains approximately constant. Therefore, the lighting fixture A1 can suppress deterioration of the sealing performance by bringing the second contact part 62 into contact with the outer circumferential surface of the lens cover 33 even when the light body 2 is rotated.

The axis of the oscillation of the lamp body 2 coincides with the center line of the pair of first shaft holes 413 and the center line of the pair of second shaft holes 415 of the first movable member 41. Moreover, in the support block 4, the center line of the pair of first shaft holes 413 and the center line of the pair of second shaft holes 415 intersect with the axis of rotation of the lamp body 2 at one point, and a virtual plane including the center line of the pair of first shaft holes 413 and the center line of the pair of second shaft holes 415 is parallel to the holding plate 70. Therefore, when the lamp body 2 oscillates around the center line of the pair of first shaft holes 413 and the center line of the pair of second shaft holes 415, the distance between each axis and the outer circumferential surface of the main part 330 of the lens cover 33 is kept almost constant (see the two-dot chain line in FIG. 4). Therefore, the frictional force acting between the lens cover 33 and the second contact part 62 when the lamp body 2 oscillates is kept almost constant. As a result, the lighting fixture A1 can prevent deterioration of the sealing performance by keeping the second contact portion 62 in contact with the outer circumferential surface of the lens cover 33 even when the lamp body 2 is swung.

Furthermore, since the thickness of the non-contact portion 65 of the sealing member 6 is greater than the thickness of each of the first contact portion 61 and the second contact portion 62, deformation of the non-contact portion 65 can be suppressed when the second contact portion 62 receives a frictional force from the lens cover 33, thereby suppressing deterioration of the sealing performance.

(5) Modifications of the Lighting Fixture According to the Embodiment Next, a modification of the lighting fixture according to the embodiment will be described. However, the modification described below is characterized by the seal member 6. As shown in Fig. 8, the seal member 6 in the modification has a plurality of protrusions 63 each having two hook claws 64. In other words, the hook claws 64 are also formed on the opposing surfaces of each of a set of protrusions 63.

In other words, the sealing member 6 in the modified example is attached to the fixture body by hooking the two hook claws 64 onto the edges of the insertion hole provided in the cylindrical part of the fixture body. In other words, in the lighting fixture of the modified example, the sealing member 6 is less likely to come off the fixture body even if the insertion hole is not blocked by the retaining piece of the mounting fixture.

In the lighting fixture of the modified example, the sealing member 6 is attached to the fixture body without using any other parts than the sealing member 6. Therefore, the lighting fixture of the modified example can improve the workability of the installation work of the sealing member 6.

In addition, as shown in FIG. 9, the sealing member 6 in the modified example has a thickness of the non-contact portion 65 that is smaller than the thickness of the first contact portion 61. In the modified example lighting fixture, the thickness of the non-contact portion 65 is smaller than the thickness of the first contact portion 61, which makes it easier for the second contact portion 62 to deform, thereby preventing a decrease in sealing performance.

(6) Summary The lighting fixture (A1) according to the first aspect of the present disclosure includes a light source unit (3) having a light source (LED 30), a fixture body (1) formed in a cylindrical shape to house the light source unit (3), and a seal member (6) that seals a gap between the fixture body (1) and the light source unit (3). The seal member (6) has a first contact portion (61) that contacts the fixture body (1), a second contact portion (62) that contacts the light source unit (3), and one or more protrusions (63) that protrude from the first contact portion (61) toward the fixture body (1). The fixture body (1) has one or more insertion holes (13) through which the protrusions (63) are inserted. The protrusions (63) have hook claws (64) that hook onto the edges of the insertion holes (13) in the fixture body (1).

In the lighting fixture (A1) according to the first aspect, the sealing member (6) is attached to the fixture body (1) by inserting the protrusion (63) into the insertion hole (13) of the fixture body (1) and hooking the hook (64) of the protrusion (63) onto the edge of the insertion hole (13) in the fixture body (1). Therefore, in the lighting fixture (A1) according to the first aspect, the sealing member (6) alone can be attached to the fixture body (1) without using a separate member, which improves the workability of attaching the sealing member (6).

The lighting fixture (A1) according to the second aspect of the present disclosure can be realized by combining it with the first aspect. The lighting fixture (A1) according to the second aspect preferably further comprises one or more mounting fixtures (8) for mounting the fixture body (1) to a construction material. The mounting fixtures (8) are preferably detachably attached to a mounting portion (12) provided on the fixture body (1). The insertion hole (13) is preferably provided near the mounting portion (12) on the fixture body (1). The protrusion (63) is preferably prevented from coming out of the insertion hole (13) by the mounting fixture (8) attached to the mounting portion (12).

The lighting fixture (A1) according to the second aspect can prevent the hook claw (64) from coming off the edge of the insertion hole (13) without using any other member other than the mounting fixture (8). As a result, the lighting fixture (A1) according to the second aspect can further improve the workability of the installation work of the sealing member (6).

The lighting fixture (A1) according to the third aspect of the present disclosure can be realized by combining it with the second aspect. In the lighting fixture (A1) according to the third aspect, it is preferable that the mounting fixture (8) prevents the protrusion (63) from coming off by partially blocking the insertion hole (13) when attached to the mounting portion (12).

The lighting fixture (A1) according to the third aspect can prevent the protrusion (63) from coming loose without adding any special structure to the mounting fixture (8).

The lighting fixture (A1) according to the fourth aspect of the present disclosure can be realized by combining it with the third aspect. In the lighting fixture (A1) according to the fourth aspect, it is preferable that the hook claw (64) is formed so as to hook onto an edge of the insertion hole (13) other than the part of the insertion hole (13) that is blocked by the mounting fixture (8).

The lighting fixture (A1) according to the fourth aspect can prevent interference between the hook (64) and the mounting fixture (8).

The lighting fixture (A1) according to the fifth aspect of the present disclosure can be realized by combining it with any of the second to fourth aspects. In the lighting fixture (A1) according to the fifth aspect, it is preferable that the mounting fixture (8) is attached to the mounting portion (12) by moving along the surface of the fixture body (1). It is preferable that the surface of the protrusion (63) facing the mounting portion (12) is inclined along the direction in which the mounting fixture (8) moves.

The lighting fixture (A1) according to the fifth aspect can improve the workability when attaching the mounting fixture (8) to the fixture body (1).

The lighting fixture (A1) according to the sixth aspect of the present disclosure can be realized by combining it with the second to fifth aspects. In the lighting fixture (A1) according to the sixth aspect, the fixture body (1) preferably has two insertion holes (13) near one mounting portion (12). The sealing member (6) preferably has two protrusions (63) that are inserted into each of the two insertion holes (13). It is preferable that a part (anti-slip piece 82) of the mounting fixture (8) attached to the mounting portion (12) is disposed between the two protrusions (63). It is preferable that the width of the part (anti-slip piece 82) of the mounting fixture (8) is narrower than the width of the portion (mounting piece 81) excluding the part of the mounting fixture (8).

The lighting fixture (A1) according to the sixth aspect has a narrower width of a portion of the mounting fixture (8) that is disposed between the two protrusions (63), so that the distance between the two protrusions (63) can be narrowed.

The lighting fixture (A1) according to the seventh aspect of the present disclosure can be realized by combining it with any of the first to sixth aspects. In the lighting fixture (A1) according to the seventh aspect, it is preferable that the lighting fixture (A1) includes a support block (4) that supports the light source unit (3) so that it can swing relative to the fixture body (1).

The seventh aspect of the lighting fixture (A1) can adjust the light distribution of the illumination light emitted from the light source unit (3) by swinging the light source unit (3) on the support block (4).

The lighting device (A1) according to the eighth aspect of the present disclosure can be realized by combining it with the seventh aspect. In the lighting device (A1) according to the eighth aspect, it is preferable that the light source unit (3) has an outer shell (lens cover 33) that surrounds the light source. It is preferable that the surface of the outer shell that contacts the second contact portion (62) is formed in an arc shape along the direction in which the light source unit (3) swings.

The lighting fixture (A1) according to the eighth aspect can maintain contact between the second contact portion (62) and the surface of the outer casing even when the light source unit (3) swings.

The lighting device (A1) according to the ninth aspect of the present disclosure can be realized in combination with the seventh or eighth aspect. The lighting device (A1) according to the ninth aspect preferably includes a holding member (7) that rotatably holds the support block (4) relative to the device body (1).

The lighting fixture (A1) according to the ninth aspect can adjust the light distribution of the illumination light emitted from the light source unit (3) by rotating the support block (4) with the holding member (7).

The lighting device (A1) according to the tenth aspect of the present disclosure can be realized by combining it with the ninth aspect. In the lighting device (A1) according to the tenth aspect, it is preferable that the light source unit (3) has an outer shell surrounding the light source. It is preferable that the surface of the outer shell that contacts the second contact portion (62) is formed in an arc shape along the direction in which the holding member (7) rotates.

The lighting fixture (A1) according to the tenth aspect can maintain contact between the second contact portion (62) and the surface of the outer casing even when the light source unit (3) rotates.

The lighting device (A1) according to the eleventh aspect of the present disclosure can be realized by combining it with any of the seventh to tenth aspects. In the lighting device (A1) according to the eleventh aspect, the device body (1) is preferably formed in a cylindrical shape with a bottom. The light source unit (3) preferably has an outer shell surrounding the light source. The surface of the outer shell that contacts the second contact portion (62) is preferably formed in a spherical shape.

The lighting fixture (A1) according to the eleventh aspect can maintain contact between the second contact portion (62) and the surface of the outer casing even when the light source unit (3) swings or rotates.

The lighting device (A1) according to the twelfth aspect of the present disclosure can be realized by combining it with any of the first to eleventh aspects. In the lighting device (A1) according to the twelfth aspect, it is preferable that the sealing member (6) has a non-contact portion (65) that is located between the first contact portion (61) and the second contact portion (62) and does not contact the device body (1) and the light source unit (3). It is preferable that the thickness of the non-contact portion (65) is greater than the thickness of each of the first contact portion (61) and the second contact portion (62).

The lighting fixture (A1) according to the twelfth aspect can suppress the deformation of the non-contact portion (65) when the second contact portion (62) receives a frictional force from the outer shell, thereby suppressing the deterioration of the sealing performance.

A1 Lighting fixture 1 Fixture body 3 Light source unit 4 Support block 6 Sealing member 7 Holding member 8 Mounting fixture 12 Mounting portion 13 Insertion hole 30 LED (light source)
33 Lens cover (outer shell)
61 First contact portion 62 Second contact portion 63 Projection portion 64 Gripping claw 65 Non-contact portion 81 Mounting piece 82 Stop piece

Claims (12)

a light source unit having a light source;
A device main body formed in a cylindrical shape and housing the light source unit;
A seal member that seals a gap between the fixture body and the light source unit;
Equipped with
The sealing member is
A first contact portion that contacts the tool body;
A second contact portion that contacts the light source unit;
One or more protrusions protruding from the first contact portion toward the tool body;
One or more mounting tools for mounting the device body to a construction material;
having
The instrument body includes:
The protrusion has one or more insertion holes through which the protrusion is inserted,
The protrusion has a hook that hooks onto an edge of the insertion hole in the tool body,
The mounting fixture is attached to a mounting portion provided on the device body,
The protrusion is prevented from coming out of the insertion hole by the mounting fixture attached to the mounting portion.
Lighting fixtures. The mounting fixture is detachably attached to the mounting portion,
The insertion hole is provided in the vicinity of the mounting portion in the instrument body.
2. The lighting device of claim 1. The mounting tool, when attached to the mounting portion, blocks a part of the insertion hole to prevent the protrusion from coming off.
3. A lighting device according to claim 2. The hook claw is formed to hook onto an edge of the insertion hole different from a part of the insertion hole that is blocked by the mounting tool.
4. A lighting device according to claim 3. The attachment tool is attached to the attachment portion by moving along a surface of the appliance body,
A surface of the protrusion facing the mounting portion is inclined along a direction in which the mounting tool moves.
A lighting device according to any one of claims 2 to 4. The tool body is provided with two of the insertion holes near one of the mounting portions,
the seal member has two protrusions each inserted into one of the two insertion holes,
A portion of the mounting tool attached to the mounting portion is disposed between the two protrusions,
The width of the part of the mounting tool is narrower than the width of the part of the mounting tool excluding the part.
A lighting device according to any one of claims 2 to 5. A support block is provided to support the light source unit so as to be swingable relative to the fixture body.
A lighting device according to any one of claims 1 to 6. The light source unit has an outer casing that surrounds the light source,
The surface of the outer shell that comes into contact with the second contact portion is formed in an arc shape along a direction in which the light source unit swings.
8. A lighting device according to claim 7. A holding member is provided to rotatably hold the support block relative to the instrument body.
9. A lighting fixture according to claim 7 or 8. The light source unit has an outer casing that surrounds the light source,
The surface of the outer shell that comes into contact with the second contact portion is formed in an arc shape along a direction in which the holding member rotates.
10. A lighting device according to claim 9. The device body is formed in a cylindrical shape with a bottom,
The light source unit has an outer casing that surrounds the light source,
The surface of the outer shell that comes into contact with the second contact portion is formed into a spherical shape.
A lighting device according to any one of claims 7 to 10. The seal member has a non-contact portion located between the first contact portion and the second contact portion and not in contact with the fixture body and the light source unit,
The thickness of the non-contact portion is greater than the thickness of each of the first contact portion and the second contact portion.
A luminaire according to any one of claims 1 to 11.

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