Lighting device

Abstract

To provide a lighting device which can fix an angle of a light projection part with simple structure and operation and enables easy control of fastening torque.SOLUTION: In a lighting device, a fastening bolt 10 is rotated to fasten an arm 2 and a light projection part 3 to each other and thereby fix an angle of the light projection part 3 relative to the arm 2. The lighting device includes an operation member 20 which is formed in a size larger than that of the fastening bolt 10 in a radial direction and can be rotationally operated by a user. The operation member 20 is provided with a through hole 21A serving as a fitting hole into which the fastening bolt 10 is fitted so that the operation member 20 can rotate integrally with the fastening bolt 10.SELECTED DRAWING: Figure 4

Description

[Technical field]

[0001] The present invention relates to a lighting fixture. [Background technology]

[0002] There is known a lighting fixture that has an arm fixed to an installation surface, a light projecting unit supported by the arm, and an angle of the light projecting unit relative to the arm that can be fixed at an appropriate angle. Some lighting fixtures of this type employ a structure in which a user can fix both ends of the arm to both sides of the light projecting unit by manually turning an arm fastening screw (for example, Patent Document 1). Also, instead of using an arm tightening screw, a lighting structure has been provided in which the angle of the light-projecting unit is fixed by temporarily fixing the light-projecting unit by turning a handle by hand and then tightening a hexagonal column-shaped tool operating unit pre-formed on the handle with a tool such as a wrench (for example, Patent Document 2). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 5805877 [Patent Document 2] JP 2018-204757 A Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in the case of a structure in which the user turns the arm fastening screw by hand, the angle of the light projecting unit can be fixed without using tools, but there is a risk of large variation in the fastening torque. On the other hand, in the case of a structure in which a hexagonal prism-shaped tool operating part pre-formed in the handle is tightened with a tool, the use of a tool makes it easier to manage the tightening torque, but since the handle serves as the fastening member, the user-operated member, and the tool operating part, there is a risk that the structure and shape of the handle will become complicated. An object of the present invention is to provide a lighting fixture that can fix the angle of the light-projecting part with a simple structure and operation, and in which the tightening torque is easy to manage. [Means for solving the problem]

[0005] In order to achieve the above-mentioned objective, a lighting device is provided which has an arm fixed to an installation surface and a light-projecting part supported by the arm, and which is capable of fixing the angle of the light-projecting part relative to the arm by rotating a specified fastening member to fasten the arm and the light-projecting part, the lighting device having an operating member which is formed radially larger than the fastening member and can be freely rotated by the user, and the operating member is provided with a fitting portion into which the fastening member fits so as to be rotatable integrally with the fastening member. Effect of the Invention

[0006] According to the present invention, it is possible to provide a lighting fixture that can fix the angle of the light-projecting part with a simple structure and operation, and in which the tightening torque is easy to manage. [Brief description of the drawings]

[0007] [Figure 1] 1 is a perspective view of a floodlight according to an embodiment of a lighting fixture of the present invention. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. 4 is an exploded perspective view of one of the left and right fixing structures. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0008] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view of a floodlight 1 according to an embodiment of a lighting fixture of the present invention, Fig. 2 is a front view of the floodlight 1, and Fig. 3 is a side view of the floodlight 1. Floodlight 1 is one of the lighting fixtures that can be installed outdoors or indoors, and can be used as a sign lighting fixture that illuminates the walls of buildings and signs, an area lighting fixture that illuminates a specific area such as an outdoor parking lot, and an illumination lighting fixture that lights up buildings, exhibits, plants, etc.

[0009] As shown in Figures 1 to 3, floodlight 1 comprises an arm 2 fixed to an installation surface and a light-projecting unit 3 supported by arm 2, and the angle of light-projecting unit 3 relative to arm 2 can be fixed by fastening tightening bolts 10 from the left and right sides of light-projecting unit 3 via arm 2. Note that the directions in this description correspond to the directions when the light-projecting unit 3 is positioned above the arm 2 in a horizontal direction (the emission direction corresponds to the horizontal direction) as exemplified in Fig. 2, and the left-right direction on the paper surface of Fig. 2 corresponds to the left-right direction of the floodlight 1, and the up-down direction on the paper surface of Fig. 2 corresponds to the up-down direction of the floodlight 1. However, the installation state of the floodlight 1 is not limited to the state shown in Fig. 2.

[0010] The floodlight 1 of this embodiment is formed in a bilaterally symmetrical shape with respect to a bilateral center plane CT that extends in the up-down and front-rear directions through the bilateral center of the floodlight 1. Note that the same reference numerals are used in each drawing to denote members provided on both the left and right sides, and duplicated explanations will be omitted. The arm 2 is formed of a plate-like member bent into a U-shape, and integrally includes a plate-like fixing part 2A that is fixed to the installation surface, and a pair of support parts 2B that extend upward from both sides of the fixing part 2A and are connected to the light projecting part 3. The fixing part 2A has a plurality of holes, and at least one of these holes can be used to fix the fixing part 2A to the installation surface with an appropriate fixing member such as a widely available bolt. Note that the shape of each part of the arm 2, including the number and shape of the holes, and the structure for fixing the arm 2 to the installation surface, etc., may be changed as appropriate.

[0011] The light projecting unit 3 functions as a lighting fixture main body that emits light. The light projecting unit 3 includes a main case 3A that constitutes the exterior body of the front part of the light projecting unit 3, and a rear case 3B that constitutes the exterior body of the rear part of the light projecting unit 3. The main case 3A is integrally provided with left and right side walls 3C and upper and lower plate parts 3D that bridge the upper and lower parts of each side wall 3C, that is, it is formed in a frame shape having a rectangular emission opening 3F that opens forward. The illumination unit 4 is disposed within the emission opening 3F of the main case 3A.

[0012] The illumination unit 4 has a light source 4A and a light distribution member 4B that distributes light from the light source 4A. The front of the illumination unit 4 is covered by a cover member 4C made of a cover glass or a blind member. In the illumination unit 4 of this configuration, a plurality of light sources 4A are arranged at intervals in the left and right and in the up and down directions, and the light of each light source 4A is respectively distributed and controlled by a dedicated light distribution member 4B, and is emitted to the outside through the cover glass. The light source 4A is, for example, a light-emitting element such as an LED, but may be a light source other than a light-emitting element. The number and arrangement of the light sources 4A may be changed as appropriate. The light distribution member 4B is, for example, a reflector, but may be a light distribution member other than a reflector.

[0013] The rear case 3B is connected to the rear of the main case 3A, and accommodates a power supply unit that supplies power to the lighting unit 4 behind the main case 3A and within the rear case 3B. Ventilation units 3T having protruding shapes that protrude outward to the left and right from each side wall 3C are provided on the left and right side walls 3C of the rear case 3B. The ventilation units 3T have a waterproof structure and a ventilation structure that waterproofs the ventilation holes provided in at least one of the left and right side walls 3C, while connecting the ventilation holes to the outside space.

[0014] Floodlight 1 of this configuration has a fixing structure that can fix the angle of floodlight unit 3 relative to arm 2 by rotating left and right tightening bolts 10 to fasten arm 2 and floodlight unit 3. This fixing structure has a bilaterally symmetrical shape with respect to the bilateral center plane CT, so hereinafter, only one of the left and right structures will be described, and the description of the other left and right structure will be omitted. FIG. 4 shows an exploded perspective view of one of the left and right fixing structures. As shown in Fig. 4, arm attachment parts 3G are provided on the side walls 3C of the main case 3A and extend rearward on the left and right outer sides of the side walls 3C of the rear case 3B. As shown in Fig. 3, the arm attachment parts 3G overlap at least a part of the side walls 3C of the rear case 3B in a side view of the floodlight 1. 4, the arm attachment portion 3G is provided with a fastening hole 3J extending in the left-right direction and a recessed portion 3K formed by cylindrically recessing an area including the fastening hole 3J. The fastening hole 3J is formed with a female thread into which a tightening bolt 10 can be fastened.

[0015] An angle plate 11 is fitted into the recess 3K, and the angle plate 11 is rotatable about the central axis Lc of the fastening hole 3J by being fitted into the recess 3K. The angle plate 11 is provided with a through hole 11A into which the fastening bolt 10 is inserted and a protrusion 11B which functions as a locking portion that locks onto the support portion 2B of the arm 2. The support portion 2B of the arm 2 is provided with a through hole 12A into which the tightening bolt 10 is inserted and a recess 12B that functions as a locked portion to which the locking portion is locked. The protrusion 11B of the angle plate 11 and the recess 12B of the arm 2 are locked together, so that the angle plate 11 and the arm 2 rotate together.

[0016] 4, fastening bolts 10 are inserted from the outside, left and right, into through holes 11A, 12A provided in support part 2B of arm 2 and angle plate 11 via spring washers 13 and operating members 20 that can be rotated by the user. By rotating fastening bolts 10 and fastening them to fastening holes 3J of arm attachment part 3G, support part 2B of arm 2 is fixed to main body case 3A and the angle of light projector 3 relative to arm 2 is fixed. The use of spring washer 13 can prevent the tightening bolt 10 from loosening. However, instead of spring washer 13, a member having a similar function to spring washer 13 may be used, for example, a packing may be used. Also, if it is not necessary to prevent the tightening bolt 10 from loosening, spring washer 13 or a part having a similar function may be omitted.

[0017] The operating member 20 and the fastening bolt 10 will be further described. The operating member 20 is integrally provided with a disk portion 21 having a through hole 21A into which the fastening bolt 10 is inserted, and a cylindrical portion 22 extending vertically from the outer circumferential end of the disk portion 21. The disk portion 21 and the cylindrical portion 22 are formed to be larger in the radial direction than the fastening bolt 10, so that the user can easily hold the cylindrical portion 22 with his / her hand and easily rotate the operating member 20. As a result, the disk portion 21 and the cylindrical portion 22 function as an operating knob (which can also be called a rotating operator) that the user can easily rotate. The shape of the operating member 20 may be changed as appropriate within the range of a diameter larger than the tightening bolt 10 or within the range that is easy for the user to operate. For example, the tubular portion 22 may be cylindrical or polygonal.

[0018] The fastening bolt 10 has an integral shaft portion 10A that can be fastened to the fastening hole 3J of the floodlight 1, a head portion 10B that is larger in diameter than the shaft portion 10A and is provided at the base end of the shaft portion 10A, and a rectangular prism-shaped fitting portion 10C that is provided between the shaft portion 10A and the head 10B. The tightening bolt 10 of this embodiment is formed in the same manner as a hexagonal bolt, except for the fitting portion 10C, that is, the shaft portion 10A has a female thread, and the head portion 10B is formed in a hexagonal shape. Therefore, the head portion 10B functions as a tool operating portion that can be tightened with a known tool such as a hexagonal wrench or a torque wrench. The head portion 10B may be appropriately changed within the range that allows tightening with a known tool, for example, it may be a polygonal shape other than a hexagonal shape, or the head portion 10B may have the same shape as a hexagonal socket bolt.

[0019] In operating member 20, through hole 21A of disk portion 21 is formed as a square hole through which shaft portion 10A of fastening bolt 10 can be inserted and into which fitting portion 10C of fastening bolt 10 fits. By fitting portion 10C of fastening bolt 10 fitting into through hole 11A, fastening bolt 10 and operating member 20 rotate together; in other words, it is possible to prevent relative rotation between fastening bolt 10 and operating member 20. The tubular portion 22 is formed into a shape that surrounds the head 10B of the tightening bolt 10 when the tightening bolt 10 is fastened to the arm attachment portion 3G. This allows the tubular portion 22 to function as a surrounding member that surrounds the head 10B, and improves the appearance by reducing the exposure of the appearance of the head 10B. In addition, the tubular portion 22 protects the head 10B from surrounding scattered objects and the like, and prevents the hand of the user operating the operating member 20 from touching the head 10B.

[0020] The outer diameter and protrusion amount of tubular portion 22 are set so as not to prevent access of a predetermined tool (e.g., a hexagonal wrench and a torque wrench) to head 10B of fastening bolt 10. This makes it easy to fasten fastening bolt 10 using a predetermined tool. By using a torque wrench, the fastening torque of fastening bolt 10 can be controlled with high precision.

[0021] A lid member that covers the opening of cylindrical portion 22 is appropriately attached to operating member 20. Although the lid member is not shown in the drawings, a lid member of any shape that covers the opening of cylindrical portion 22 can be applied. By attaching a lid member that covers the opening of cylindrical portion 22, head 10B inside the opening of cylindrical portion 22 can be prevented from being exposed to the outside. Since head 10B is not exposed to the outside, it is possible to improve the appearance of floodlight 1 and to easily prevent dust and rainwater from adhering to head 10B.

[0022] As described above, floodlight 1 of the present embodiment is configured to be able to fix the angle of floodlight unit 3 relative to arm 2 by rotating fastening bolt 10 to fasten arm 2 and floodlight unit 3. Furthermore, floodlight 1 has operating member 20 that is formed to be radially larger than fastening bolt 10 and can be freely rotated by a user, and this operating member 20 is provided with through hole 21A into which fastening bolt 10 fits so as to be rotatable integrally with fastening bolt 10. According to this configuration, the user can rotate the tightening bolt 10 via the operation member 20, so that the angle of the light-projecting unit 3 can be easily temporarily fixed by turning the operation member 20 by hand. After the temporary fixation, the tightening torque of the tightening bolt 10 can be set within an appropriate range by rotating the tightening bolt 10 with a specified tool, and the tightening torque can be managed. Furthermore, since the operation member 20 does not require a structure related to managing the tightening torque, the structure and shape of the operation member 20 can be simple. As a result, it is possible to provide a lighting fixture that can fix the angle of the light-projecting unit 3 with a simple structure and operation, and in which the tightening torque is easy to manage.

[0023] Furthermore, since through hole 21A is a square hole, it is easy to provide a hole into which fastening bolt 10 fits. The tightening bolt 10 is an example of a "predetermined fastening member" of the present invention, and any suitable shape of fastening member can be used as the fastening member of the present invention. The through hole 21A is an example of a "fitting hole" of the present invention, and any suitable shape into which a predetermined fastening member can be fitted can be used as the fitting hole of the present invention. For example, the through hole 21A may be a polygonal shape other than a square, or may be an elliptical shape that approximates a square hole into which a predetermined fastening member is fitted.

[0024] Furthermore, operating member 20 has disk portion 21 with through hole 21A formed therein, and tubular portion 22 extending vertically from disk portion 21. Fastening bolt 10 has head 10B at one end thereof, and when fastening bolt 10 is fastened, head 10B of fastening bolt 10 fits within tubular portion 22. With this configuration, operating member 20 of a simple shape can prevent fastening bolt 10 from being exposed to the outside, which is advantageous for improving the appearance of floodlight 1 and preventing dust and rainwater from adhering to fastening bolt 10.

[0025] Furthermore, floodlight 1 has a cover member that covers the opening of tubular portion 22, so head 10B of tightening bolt 10 is not exposed to the outside. This is therefore advantageous in improving the appearance of floodlight 1 and preventing dust and rainwater from adhering to tightening bolt 10.

[0026] The above-described embodiment is merely an example of one embodiment of the present invention, and any modifications and applications are possible without departing from the spirit and scope of the present invention. For example, the present invention has been applied to floodlight 1 shown in FIG. 1 etc., but the shape and structure of each part of floodlight 1 may be modified as appropriate, and the present invention may be applied to lighting fixtures other than floodlights.

[0027] The above embodiment supports the following configurations.

[0028] (Configuration 1) A lighting device having an arm fixed to an installation surface and a light-projecting part supported by the arm, in which the angle of the light-projecting part relative to the arm can be fixed by rotating a specific fastening member to fasten the arm and the light-projecting part, the lighting device having an operating member that is formed radially larger than the fastening member and can be freely rotated by a user, and the operating member is provided with a fitting hole into which the fastening member fits so as to be rotatable integrally with the fastening member. According to this configuration, since the user can rotate the fastening member via the operating member, the angle of the light projecting unit can be easily temporarily fixed by turning the operating member by hand. In addition, by rotating the fastening member with a specified tool, the tightening torque can be easily managed. In addition, since the operating member does not require a structure related to tightening torque management, the structure and shape of the operating member can be simple. As a result, it is possible to provide a lighting fixture that can fix the angle of the light projecting unit with a simple structure and operation, and that makes it easy to manage the tightening torque.

[0029] (Configuration 2) The lighting device according to configuration 1, wherein the fitting hole is a rectangular hole. According to this configuration, holes into which the fastening members fit can be easily provided.

[0030] (Configuration 3) A lighting device as described in configuration 1 or 2, wherein the operating member has a disk portion in which the fitting portion is formed and a cylindrical portion extending vertically from the disk portion, and the fastening member has a head at one end, and when the fastening member is fastened, the head of the fastening member fits within the cylindrical portion. According to this configuration, the simple shape of the operating member makes it possible to reduce exposure of the fastening member to the outside, which is advantageous for improving the appearance of the lighting fixture and preventing dust and rainwater from adhering to the fastening member.

[0031] (Configuration 4) The lighting device according to configuration 3, further comprising a cover member for covering the opening of the cylindrical portion. According to this configuration, the heads of the fastening members are not exposed to the outside, which is advantageous in improving the appearance of the lighting fixture and preventing dust and rainwater from adhering to the fastening members. [Explanation of symbols]

[0032] 1. Floodlight (lighting equipment) 2 Arm 3 Light projector 10 Fastening bolt (fastening member) 20 Operation member 21A Through hole (mating part) 21 Disc Club 22 Cylindrical part

Claims

1. A lighting fixture having an arm fixed to an installation surface and a light-projecting unit supported by the arm, the light-projecting unit being capable of being fixed in angle with respect to the arm by fastening the arm and the light-projecting unit together by rotating a predetermined fastening member, The fastening member has an operating member that is formed to be larger in a radial direction than the fastening member and can be freely rotated by a user. The operating member is provided with a fitting hole into which the fastening member is fitted so as to be rotatable together with the fastening member. Lighting fixtures.

2. The fitting hole is a rectangular hole.

2. A lighting fixture according to claim 1.

3. The operating member has a disk portion in which the fitting hole is formed and a cylindrical portion extending vertically from the disk portion, The fastening member has a head at one end, When the fastening member is fastened, the head of the fastening member fits within the tubular portion.

3. A lighting device according to claim 1 or 2.

4. A cover member for covering the opening of the cylindrical portion is provided.

4. A lighting device according to claim 3.

Images