JP4431438B2 - Spotlight - Google Patents

Description

  The present invention relates to a spotlight that is suspended from, for example, a ceiling of a store.

  In general, a spotlight as described above is attached to an attachment site such as a ceiling via a support member while being able to swing in the vertical direction and rotatable within a horizontal plane. The swing angle and the rotation angle of the spotlight can be adjusted in accordance with the position and shape of the illuminated object so that the illuminated light is well irradiated to the illuminated object (for example, Patent Document 1). ).

Also, a plurality of trimming cutters are arranged at positions that can block the light path of the light from the light source so that the shape of the illumination spot with respect to the illumination object can be arbitrarily changed according to the shape of the illumination object. In addition, a spotlight is also known in which a position where the light path is blocked by the trimming cutter can be changed so that a light passing aperture portion having a desired shape can be formed (for example, Patent Document 2).
No. 7-35215 JP 2000-195302 A

  By the way, in the spotlight having the trimming cutter as described above, after adjusting the position of the plurality of trimming cutters and setting the shape of the aperture portion for passing light, after setting the shape of the illumination spot for the illuminated object In some cases, it is desired to finely adjust the illumination spot in the rotational direction with respect to the illumination object.

  However, conventionally, since the spotlight itself could not be rotated around its own axis while maintaining the positional relationship between the trimming cutters, the position and position of each aperture cutter are adjusted again by moving the position of each trimming cutter. Alternatively, it was only possible to adjust the vertical swing position of the spotlight and the rotation position in the horizontal plane, and it was not possible to sufficiently satisfy the fine adjustment requirement.

  The present invention has been made in view of such a situation, and after setting the position of the trimming cutter and setting the shape of the illumination spot with respect to the illumination object, the illumination spot can be easily applied to the illumination object. It is an object to provide a spotlight that can be rotated.

In order to solve the above problems, the present invention provides the following means.
(1) A plurality of trimmings that are arranged so as to block the light path of the light from the light source and the light source at a position in front of the light source, and change the position of the light path to change the shape of the illumination spot. In a spotlight provided with a cutter, the rotation operation unit made of a hollow cylinder that rotates the plurality of trimming cutters around the optical axis without changing the mutual positional relationship, and disposed behind the rotation operation unit An annular connecting portion, the annular connecting portion including a first member on the front side having a larger diameter than the rotation operation portion and a second member on the rear side, and a rear end portion of the rotation operation portion and the first member When the front end of the member is rotatably fitted, the plurality of trimming cutters rotate together with the rotation operation unit when the rotation operation unit is rotated, and each trimming cutter is operated. When the cutter is movable in a plane perpendicular to the optical axis, the cutter is supported by the rotary operation unit on the rear side of the first member, and the second member is behind the trimming cutter. The trimming cutter is connected to the first member in such a manner that a plurality of spaces allowing movement in the length direction and the width direction of the trimming cutter are formed between the first member and the trimming cutter. The spotlight is characterized in that the rear end portion of the second member is connected to the spotlight body, and is arranged transversely to the spotlight body .
(2) A plurality of annular plate members overlapped in the front-rear direction across each trimming cutter, and a screw member inserted through a coil spring passing through each annular plate member from the rear of the last annular plate member The spotlight according to the preceding item 1, wherein each of the trimming cutters is supported by the operation unit by a clamping force received from a coil spring via an annular plate member by being screwed into the rotation operation unit.

  According to the invention described in item (1) above, since the plurality of trimming cutters can be rotated around the optical axis without changing the mutual positional relationship by rotating the rotation operation unit. The illumination spot for the object can be adjusted in the direction of rotation without changing its shape. As a result, as in the past, the work of moving the position of each trimming cutter to adjust the shape and angle of the aperture again, and the work of adjusting the vertical swing position of the spotlight and the rotation position in the horizontal plane It becomes unnecessary and the illumination spot can be easily rotated.

  According to the invention described in item (2) above, the rotation operation unit is configured to be rotatable with respect to the spotlight main body to which the light source is attached while supporting the trimming cutter. The spotlight main body does not rotate, and therefore there is no inconvenience such as twisting of the power supply lead wire due to rotation of the lamp.

  An embodiment of the present invention will be described below.

  1 is an exploded perspective view showing a spotlight according to an embodiment of the present invention with a support member attached, FIG. 2 is a side view showing a part of the spotlight with a support member in a longitudinal section, and FIG. These are the front views seen from the front side of the length direction (axial direction) of a spotlight.

  In these drawings, reference numeral 1 denotes a spotlight. This spotlight 1 is pivotally mounted on an inverted U-shaped support arm 2 so that a middle portion in the length direction can be swung vertically. The support arm 2 has a mounting plate 21 rotatably attached to a central portion in the length direction, and the support arm 2 is rotatably attached to the ceiling or the like by fixing the mounting plate 21 to the ceiling or the like. It is supposed to be worn. Therefore, in the state of being attached to the ceiling or the like, the spotlight 1 is supported in a suspended state by the support arm 2, and the vertical swing angle of the spotlight 1 with respect to the support arm 2 is adjusted and the horizontal surface of the support arm 2 is adjusted. By adjusting the rotation angle inside, it is possible to give an appropriate spot illumination to the illumination object.

  The spotlight 1 includes a spotlight body 3, an intermediate unit 4, and an illumination spot diameter adjusting unit 5 in order from the rear side in the length direction.

  The spotlight body 3 is made of a resin-made cylindrical housing member having a circular cross section with a front end opened and a rear side reduced in diameter, and both end portions of the support arm 2 are rotatably attached to an outer peripheral surface of the front end portion. Yes. In addition, a lamp socket 31 connected to a power supply lead wire (not shown) is disposed at the inner rear end of the spotlight body 3, and a lamp 32 as a light source is attached to the lamp socket 31. Yes.

  The intermediate unit 4 includes a plurality of (four in this embodiment) metal trimming cutters 41, a resin-made rotation operation unit 42 that supports the trimming cutters 41, the rotation operation unit 42, and the spotlight. A resin-made annular coupling portion 43 that couples the main body 3 is provided.

  As shown in detail in FIG. 4, each of the trimming cutters 41 is formed by integrally forming a triangular cutter blade 411 and a strip-shaped operation piece 412, and the thickness direction is the length direction (axial direction) of the spotlight 1. And the cutter blade 411 is attached to the rear end surface of the rotary operation unit 42 in a mode in which the cutter blade 411 is positioned on the radial center side of the spotlight 1. A rubber knob 413 is covered on the outer end of the operation piece 412. The attachment of the trimming cutter 41 will be described later.

  As shown in FIGS. 4 and 5, the rotation operation unit 42 is formed of a hollow cylinder having a circular cross section, and the front side in the length direction is formed as the large-diameter portion 421 and the rear side is formed as the small-diameter portion 422. An annular step 423 is formed at the boundary between 421 and the small diameter portion 422. Further, an inner cylinder part 424 is integrally formed inside the rotation operation part 42, and the illumination spot diameter adjusting part 5 is screwed to a female screw part 425 on the inner peripheral surface of the inner cylinder part 424. In addition, a total of four bulging portions 426 extending in the length direction are formed on the inner circumferential surface of the rear portion of the rotation operation portion 42 at four equal positions in the circumferential direction. Screw holes 427 for supporting the trimming cutter 41 are formed.

  The annular connecting portion 43 includes a front first member 44 and a rear second member 45. As shown in FIGS. 4 and 5, the first member 44 integrally includes a cylindrical insertion portion 441 having a constant inner diameter and a skirt portion 442 having a reduced diameter toward the front outside the cylindrical insertion portion 441. Yes. The cylindrical insertion portion 421 is a portion through which the small diameter portion 422 of the rotation operation portion 42 is inserted, and the inner diameter thereof is set slightly larger than the outer diameter of the small diameter portion 422 of the rotation operation portion 42. The rotation operation unit 42 can be rotated around its own axis while the small-diameter portion 422 is inserted through the shape insertion unit 441. Further, when the small diameter portion 422 of the rotation operation portion 42 is inserted into the cylindrical insertion portion 441, the step portion 423 of the rotation operation portion 42 is locked to the peripheral edge portion of the front end of the cylindrical insertion portion 441. A locking step 443 is formed.

  In addition, a total of four solid portions 444 are provided between the cylindrical insertion portion 441 and the skirt portion 442 at the rear portion of the first member 44 at four equally spaced positions in the circumferential direction, and each solid portion 444 is provided. Are formed with screw hole portions 445 for fixing the second member 45.

  The trimming cutter 41 is attached as follows. That is, as shown in FIG. 5, the small diameter portion 422 of the rotation operation portion 42 is locked to the locking step portion 443 of the first member 44 of the annular coupling portion 43 by the step portion 423 of the rotation operation portion 42. Until it is inserted through the cylindrical insertion portion 441. In this state, the rear end of the rotation operation unit 42 and the rear end of the first member 44 are substantially flush.

  Next, as shown in FIG. 4, four annular disk members 46 a to 46 d are prepared behind the rotation operation unit 42. Each of the disk members 46a to 46d is formed with a light passage hole 461 at the center and four screw through holes 462 on each peripheral surface. Further, the outer diameter of each of the disk members 46 a to 46 d is larger than the outer diameter of the small diameter portion 422 of the rotation operation portion 42, and is substantially equal to the outer diameter of the cylindrical insertion portion 441 of the first member 44 of the annular coupling portion 43. Are set the same.

  Then, one trimming cutter 41 is sandwiched between the first disk member 46a and the second disk member 46b, and is opposed between the second disk member 46b and the third disk member 46c. The first to fourth circles with two trimming cutters 41, 41 sandwiched between them and with one trimming cutter 41 sandwiched between the third disc member 46c and the fourth disc member 46d. The plate members 46a to 46d are overlapped in the thickness direction, and after four screws 47 are inserted into the screw through holes 462 of the disk members 46a to 46d from the rear, the respective members at the rear end of the rotation operation unit 42 are inserted. Screw into the screw hole 427. A coil spring 48 is interposed between the head of the screw 47 and the outermost disk member 46d. By adjusting the screwing amount of the screw 47, a trimming cutter is connected to the trimming cutter from the coil spring 48 via the disks 46a to 46d. The clamping pressure received by 41 can be adjusted. This clamping pressure is set to a size that can move each trimming cutter 41 when the user moves it by hand, and can hold the position when the trimming cutter 41 is not moved by hand.

  After the trimming cutter 41 is attached, the second member 45 of the annular connecting portion 43 is fixed to the first member 44. The second member 45 has a short cylindrical shape as shown in FIGS. 1, 2 and 6, and a total of four partitioning projections at four circumferentially-divided positions in the circumferential end surface on the front side (first member side). 451 is provided. Further, the inside of each partitioning projection 451 bulges inward in the radial direction, and a threaded through hole 453 is formed through the bulging portion 452 in the front-rear direction. Then, as shown in FIG. 6, the screw 49 is passed through the screw through hole 463 from the rear, and the tip of the screw 49 is screwed into the screw hole portion 445 of the first member 44. 44 and the second member 45 are connected and fixed.

  In such a connected state of the first member 44 and the second member 45, as shown in FIGS. 1 and 6, the circumferentially divided position is divided between the first member 44 and the second member 45. In addition, four partitioning projections 451 of the second member 45 are arranged with their front end surfaces in contact with the first member 44, and a total of four arcuate spaces 40 are formed between adjacent partitioning projections 451. Is formed. Further, the positional relationship between each trimming cutter 41 and the annular connecting portion 43 is set so that each of the trimming cutters 41 is arranged across the respective arcuate spaces 40 in the radial direction.

  Then, within the range of the length of the arc-shaped space 40, the user can grip the knob portion 413 of each trimming cutter 41 protruding outward in the radial direction, and freely adjust the trimming cutter 41 in a plane perpendicular to the optical axis. It can be moved. For example, it can be moved in a radial direction (length direction of the operation piece 412) so as to be movable back and forth, or can be moved in a swingable manner in the circumferential direction of the annular connecting portion 43 (width direction of the operation piece 412). Yes. As a result, the four blades of the cutter blades 411 of the respective trimming cutters 41 face the light passage holes 461 of the disk members 46 a to 46 d sandwiching the trimming cutter 41 so as to be inward of the light passage holes 461. The aperture portion 6 (shown in FIG. 3) surrounded by the edge of 411 is formed, and the shape of the aperture portion 6 is adjusted by adjusting the position of the cutter blade 411, in other words, the light passing through the aperture portion 6 The optical path cross-sectional shape is arbitrarily set, and as a result, the illumination spot shape with respect to the illumination object can be set variably.

  As shown in FIGS. 5 and 6, the second member 45 is integrally formed with an L-shaped leg piece 454 that is continuous with the screw hole bulging portion 452 and protrudes rearward. The periphery of the conical reflector 7 whose inner surface is a reflective surface is screwed to the leg piece 454, and the reflector 7 is attached integrally with the second member 45. The reflector 7 is for reflecting the light of the lamp 32 forward, and a lamp insertion hole 71 (see FIG. 2) is formed in the center of the rear part thereof.

  As shown in FIG. 6B, the intermediate unit 4 having such a configuration is in a state where the lamp 32 is inserted into the lamp insertion hole 71 of the reflector 7 as shown in FIG. Are fitted on the front end portion of the spotlight main body 3 and then screwed with set screws 455 penetrating the second member 45 in the thickness direction at a plurality of locations in the circumferential direction of the second member 45, thereby 3 is attached.

  In such an attached state of the intermediate unit 4, the rotation operation unit 42 of the intermediate unit 4 is held so as to be rotatable about its own axis with respect to the spotlight body 3, and is further rotated through the disk portions 46 a to 46 d. The trimming cutter 41 supported integrally with the portion 42 is rotatable with respect to the spotlight main body 3 while maintaining the positional relationship between the cutters 41.

  As shown in FIG. 1, the spot diameter adjusting portion 5 located on the front end side of the spotlight 1 is formed of a resin cylinder having a male threaded portion 51 on the rear outer peripheral surface, and the male threaded portion 51 is rotated. The inner thread portion 425 of the inner cylinder portion 424 of the portion 42 is screwed. The spot diameter adjusting unit 5 adjusts the size of the circular illumination spot by rotating the spot diameter adjusting unit 5 and adjusting the advance and retreat in the axial direction when the trimming cutter 41 is not used. is there.

  Next, a method of using the spotlight 1 according to the illustrated embodiment will be described.

  The spotlight 1 is supported by a support arm 2 in a suspended state on a ceiling or the like. The user grasps the knob portion 413 and moves the four trimming cutters 41 in the length direction and the width direction of the operation piece 412, and the cutter blade 411 facing the light passage hole 461 of the disk members 46 a to 46 d. The shape of the aperture 6 formed by the cutter blades 411 of the four trimming cutters 41 is set. In this embodiment, a rectangular aperture 6 is formed as shown in FIG.

  Next, by adjusting the vertical swing angle and the horizontal rotation angle of the spotlight 1, an illumination spot is applied to the illumination object. The light from the lamp 32 is restricted to a square optical path by the aperture unit 6, and the illumination spot becomes a square.

  Next, when it is desired to finely adjust the illumination spot in the rotation direction according to the shape of the illumination object, the rotation operation unit 42 is rotated. Since the trimming cutter 41 is supported by the rotation operation unit 42, the trimming cutter 41 maintains the positional relationship between the four trimming cutters 41 according to the rotation of the rotation operation unit 42, in other words, the size of the aperture unit 6 and The object is rotated around the optical axis without affecting the shape, and the illumination target is irradiated with an illumination spot having an intended rotation angle and an expected shape.

  As mentioned above, although one Embodiment of this invention was described, this invention is not limited to the said embodiment. For example, although the rotation operation unit 42 is configured to rotate with respect to the spotlight body 3, the rotation operation unit 42 and the spotlight body 3 may be configured to rotate integrally. However, in this case, since the lamp 32 in the spotlight body 3 also rotates together, there is a risk of causing a torsion or the like of the power supply lead wire. For this reason, the spotlight body 3 does not have such a risk as in the present embodiment. It is desirable to have a configuration in which the rotation operation unit 42 is fixed and rotated.

It is a perspective view which decomposes | disassembles and shows each part of a spotlight in the state which attached the supporting member to the spotlight which concerns on one Embodiment of this invention. It is a side view which shows the spotlight which attached the supporting member in part longitudinal cross-section. It is the front view seen from the front side of the length direction (axial direction) of a spotlight. It is a disassembled perspective view of an intermediate unit. It is a principal part enlarged view of FIG. (A) is a top view of the vicinity part of a cyclic | annular connection part, (b) is the VI-VI sectional view taken on the line of Fig. (A).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spotlight 2 Support arm 3 Spotlight main body 4 Intermediate unit 6 Aperture part 32 Lamp 41 Trimming cutter 42 Rotation operation part 43 Annular connection part 46a-46d Disk member 461 Light passage hole

Claims (2)

A light source and a plurality of trimming cutters that are arranged so as to block the light path of light from the light source at a position in front of the light source and that can change the shape of the illumination spot by changing the position that blocks the light path. In the provided spotlight,
A rotation operation unit made of a hollow cylindrical body that rotates the plurality of trimming cutters around the optical axis without changing the positional relationship with each other, and an annular coupling unit disposed behind the rotation operation unit,
The annular connecting portion is composed of a first member on the front side having a larger diameter than the rotation operation portion, and a second member on the rear side,
A rear end portion of the rotation operation portion and a front end portion of the first member are fitted so as to be rotatable,
The plurality of trimming cutters rotate together with the rotation operation unit when the rotation operation unit is rotated, and each cutter can be moved within a plane perpendicular to the optical axis when each trimming cutter is operated. In an aspect that is supported by the rotation operation unit on the rear side of the first member,
The first member is configured to form a plurality of spaces allowing movement of the trimming cutters in the length direction and the width direction between the second member and the first member behind the trimming cutter. And each trimming cutter is disposed across the space in the radial direction,
A spotlight, wherein a rear end portion of the second member is connected to a spotlight body . A plurality of annular plate members stacked in the front-rear direction across the trimming cutters,
  By screwing the screw member through which the coil spring has passed through the annular plate member from behind the rearmost annular plate member and screwing it into the rotation operation portion, each of the trimming cutters is received by the coil spring via the annular plate member. The spotlight of Claim 1 currently supported by the said operation part with the pressure.