JP4720789B2 - Spotlight - Google Patents

Description

  The present invention relates to a spotlight installed on a ceiling surface or the like.

  2. Description of the Related Art Conventionally, spotlights that are used for product production or space production in an architectural space and are installed on a ceiling surface, a wall surface, or the like are known. A conventional spotlight will be described with reference to FIG. The spotlight 101 accommodates the light source 102, the ballast 103 that turns on the light source 102, the ballast 103, the case 104 that is attached to the ceiling surface C, and the end of the case 104 can be rotated in the horizontal direction. And a shade 107 (rotating body) that is attached to a horizontal shaft 154 at the lower end of the arm 105 and that is rotatable in the vertical direction. A light source 102 and a reflecting mirror 106 are attached to the shade 107, and the direction of the reflected light L1 can be freely changed in the horizontal direction and the vertical direction.

  Further, a spotlight that can obtain a clean and straight light distribution even when light is irradiated from an oblique direction to the irradiation surface is known (for example, see Patent Document 1).

However, in these conventional spotlights, the reflector is suspended from the end of the casing, and the distance from the reflector to the opposite end of the casing is long. When facing from the horizontal to the ceiling side, the reflected light irradiates the casing, the ambient temperature of the ballast in the casing rises, and the lighting becomes unstable. In the example of FIG. 7, the light ray line A on the upper end side of the reflected light L1 is directed to the ceiling side by 15 ° from the horizontal direction B, and the reflected light L1 is blocked by the housing 104. For this reason, the direction of the reflected light cannot be directed more toward the ceiling than the horizontal, and a sufficient irradiation range cannot be ensured.
JP 2002-117701 A

  The present invention has been made to solve the above-described conventional problems, and the direction of the reflected light can be directed to the installation surface rather than the surface parallel to the installation surface, and a sufficient irradiation range can be ensured. An object is to provide a spotlight that can be used.

  In order to achieve the above object, the invention of claim 1 is directed to a light source, a ballast for turning on the light source, a housing that houses the ballast and is attached to an installation surface, and the installation with respect to the housing. An arm that is rotatable about a first rotation axis that is perpendicular to the surface and that supports the light source; and an arm that is rotatable about a second rotation axis that is parallel to the installation surface within a predetermined range. In the spotlight including the reflecting mirror, the first rotation shaft is provided in the vicinity of a substantially central portion of the housing, the height from the second rotation shaft to the housing, and the first rotation. The maximum dimension in a plane parallel to the installation surface of the housing from the shaft is such that the reflected light from the reflection mirror is rotated in a state where the reflection mirror is rotated toward the installation surface to the maximum within the predetermined range. It is set not to block.

  According to invention of Claim 1, since the 1st rotating shaft is provided in the approximate center part of the housing | casing, the maximum dimension in the surface parallel to the installation surface of the housing | casing from a 1st rotating shaft is short. In addition, since the reflecting mirror is on the extended line of the first rotation axis, the reflecting mirror can be largely directed to the installation surface without the reflected light being blocked by the casing, and a sufficient irradiation range can be ensured.

  A spotlight according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 thru | or FIG. 3 (a) (b) shows the structure of the spotlight which concerns on this embodiment. The spotlight 1 is an illuminating device that is installed on, for example, a ceiling surface and is suspended and fixed, and irradiates an object with illumination light for product production in a commercial space or space production in an architectural space. The spotlight 1 includes a light source 2, a ballast 3 that turns on the light source, a case 4 that houses the ballast 3 and is attached to the installation surface, an arm 5 that is provided on the case 4 and supports the light source 2, And a reflecting mirror 6 attached to the arm.

  The light source 2 is disposed substantially parallel to the opening surface of the reflecting mirror 6. The reflecting mirror 6 is fixed to the shade 7, and the shade 7 is supported at the lower end portion of the arm 5 so as to be rotatable about the central axis in the longitudinal direction of the light source 2. The light source 2 is composed of, for example, a ceramic metal halide lamp. This ceramic metal halide lamp is tall and has a substantially cylindrical outer shape. The base of the ceramic metal halide lamp is, for example, a screw type, and is attached to a socket 8 housed in the lower end portion of the arm 5. The light source 2 is arranged so that its longitudinal direction is substantially parallel to the horizontal direction. The configuration and shape of the light source 2 are not limited to the above.

  The reflecting mirror 6 has a substantially truncated cone shape or a substantially bowl shape, and its diameter is larger than the length of the bulb portion of the light source 2. The reflecting mirror 6 is provided with openings 61 and 62 on the front surface and the back surface. The front opening 61 is a light emitting opening and has a larger diameter than the rear opening 62. The rear opening 62 is an opening for heat dissipation.

  The arm 5 is a hollow cylindrical body and includes a horizontal portion 51 and a vertical portion 52 that extends downward from the one end of the horizontal portion 51 at an angle of approximately 90 degrees with the horizontal portion 51. The other end of the horizontal portion 51 is provided with a substantially cylindrical vertical shaft portion 53 extending upward. The vertical shaft 53 is inserted into a hole (not shown) provided in the bottom of the housing body 41. A rotation stopper 55 for restricting the rotation range is fitted to the front end portion of the vertical shaft portion 53 inserted into the housing body 41. Further, a nut 56 is attached to the most distal end portion of the vertical shaft portion 53.

  A horizontal shaft portion 54 for attaching the socket 8 is formed at the lower end of the vertical portion 52. The horizontal shaft portion 54 has a substantially cylindrical shape, and protrudes in a direction substantially parallel to the horizontal portion 51 on the vertical shaft portion 53 side. The central axis of the horizontal shaft portion 54 substantially coincides with the central axis in the longitudinal direction of the light source 2. At the tip of the horizontal shaft portion 54, a part of the outer periphery is notched and a stepped portion 54a is formed. The horizontal shaft portion 54 accommodates the socket 8. A lead wire (wiring) (not shown) led out from the socket 8 is housed inside the arm 5 and led to the ballast 3 in the housing 4.

  The shade 7 includes a saddle main body 71 having a bowl-like shape with a front opening and a substantially circular shape when viewed from the front, and a substantially annular front frame 72 having a size corresponding to the front opening of the shade main body 71. The size of the shade main body 71 corresponds to the size of the reflecting mirror 6, and the diameter of the shade main body 71 is larger than the length of the bulb portion of the light source 2. A heat dissipation opening 71 a is provided on the back surface of the shade body 71, and the position of the opening 71 a corresponds to the heat dissipation opening 62 of the reflecting mirror 6. The front frame 72 is configured to be attachable to the shade main body 71 by being fitted into the front opening of the shade main body 71 and rotating. The reflecting mirror 6 is fitted from the front opening of the shade main body 71 and is pressed against the inside of the shade main body 71 by the fixing spring 9 to be fixed. In this way, the shade body 71 includes the reflecting mirror 6. A front frame 72 is attached to the front opening of the shade body 71 in a state where the reflecting mirror 6 is enclosed in the shade body 71.

  A substantially cylindrical bearing portion 71 b is formed through the side portion of the seed body 71 so as to penetrate therethrough. The horizontal shaft portion 54 of the arm 5 is fitted into the bearing portion 71b. The shade 7 can be rotated about the horizontal shaft portion 54 in a state where the horizontal shaft portion 54 is fitted into the bearing portion 71b. Therefore, when the light source 2 is mounted on the socket 8 and the horizontal shaft portion 54 is inserted into the bearing portion 71b, the light irradiation direction can be changed in the vertical direction by simply rotating the shade 7 without moving the light source 2. It becomes possible to change to.

  A protruding rotation stopper 71c for restricting the rotation range of the shade 7 is formed inside the bearing portion 71b. The rotation range of the shade 7 is restricted by the rotation stopper 71c coming into contact with the stepped portion 54a when the horizontal shaft portion 54 is rotated. In addition, an arcuate leaf spring member 73 formed corresponding to the outer peripheral shape of the horizontal shaft portion 54 is disposed in the bearing portion 71b. The leaf spring member 73 is provided on the front opening side of the shade body 71 and presses the horizontal shaft portion 54 inserted in the bearing portion 71 b toward the back side of the shade body 71. For this reason, it is possible to prevent the horizontal shaft portion 54 from falling off and to secure the axial force.

  The housing 4 includes a housing body 41 having an upper surface opened and a cover 42 that closes the opening. The housing body 41 accommodates the ballast 3 and the plug 10 that is connected to a wiring duct (not shown) and supplies power to the ballast 3. The plug 10 is provided so as to be partly exposed and fixed to the cover 42 in order to enable connection with the wiring duct. The lead wire of the socket 8 guided by the arm 5 is connected to the ballast 3 in the housing body 41.

  As described above, since the arm 5 is supported by the casing 4 so as to be horizontally rotatable by the vertical shaft portion 53, the light irradiation direction can be changed in the horizontal direction. Further, by rotating the shade 7 in the vertical direction around the horizontal shaft portion 54 of the arm 5, the direction of the opening 61 of the reflecting mirror 6 fixed to the shade 7 is changed, and the light irradiation direction is changed up and down. be able to.

  Next, an upward irradiation angle of the spotlight configured as described above will be described with reference to the drawings. 4 and 5 show a state in which the reflecting mirror 6 faces the two longitudinal directions of the housing 4 and irradiates the ceiling surface C. FIG. In the present embodiment, the casing 4 is installed perpendicularly to the ceiling surface C so that the vertical shaft portion 53 is attached in the vicinity of the substantially central portion of the casing 4. Even if the ray line A on the upper end side of the reflected light L irradiates a predetermined angle θ upward from the horizontal direction B, the height from the center of the horizontal shaft portion 54 to the housing 4 is not blocked by the housing 4. The height H and the maximum dimension K in a plane parallel to the installation surface of the housing 4 from the vertical shaft portion 53 are set. As a result, the reflected light L is not blocked by the casing 4 regardless of the horizontal direction of the reflecting mirror 6. The rotation of the shade 7 is restricted by the step portion 54a and the rotation stopper 71c so that the light line A does not illuminate upward from the horizontal direction B by a predetermined angle θ. FIG. 6 shows a state where the reflecting mirror 6 faces the short side direction of the housing 4 and irradiates the ceiling surface C. FIG. Even if the light line A irradiates a predetermined angle θ upward from the horizontal direction B, it is not blocked by the housing 4.

  Since the vertical shaft portion 53 is provided at a substantially central portion of the housing 4, the maximum dimension on the surface parallel to the top surface C of the housing 4 from the vertical shaft portion 53 is short. Further, since the reflecting mirror 6 is on the extended line of the vertical shaft portion 53, the reflecting light L can be largely directed to the ceiling surface C without being blocked by the casing 4, and the ballast 3 can be reflected by the reflecting light. A sufficient irradiation range can be ensured without being heated by L and becoming unstable.

  In addition, this invention is not limited to the structure of said embodiment, A various deformation | transformation is possible according to a use purpose. For example, the spotlight 1 is not limited to a ceiling surface, and may be configured to be installed on a wall surface or a floor surface.

The perspective view of the spotlight which concerns on one Embodiment of this invention. The exploded perspective view of the spotlight. (A) is the perspective view of the state which removed the shade from the arm in the spotlight, (b) is the perspective view of the arm part in the spotlight. The side view of the state which the spotlight is irradiating the one longitudinal direction upper direction of a housing | casing. The side view of the state which the spotlight is irradiating the other longitudinal direction upper direction of a housing | casing. The side view of the state which the same spotlight is irradiating the transversal direction upper direction of a housing | casing. The side view of the state which the conventional spotlight has irradiated the longitudinal direction upper direction of the housing | casing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spotlight 2 Light source 3 Ballast 4 Case 5 Arm 53 Vertical axis part (1st rotating shaft)
54 Horizontal shaft (second rotary shaft)
6 Reflector C Ceiling surface (installation surface)
L Reflected light

Claims (1)

A light source, a ballast that turns on the light source, a housing that houses the ballast and is attached to an installation surface, and a rotatable about the first rotation axis perpendicular to the installation surface with respect to the housing In a spotlight comprising: an arm that is provided and supports the light source; and a reflector that is attached to the arm so as to be rotatable within a predetermined range around a second rotation axis that is parallel to the installation surface.
The first rotation shaft is provided in the vicinity of a substantially central portion of the housing;
The height from the second rotation axis to the casing and the maximum dimension in a plane parallel to the installation surface of the casing from the first rotation axis are maximized within the predetermined range. The spotlight, wherein the spotlight is set so as not to block light reflected by the reflecting mirror in a state of being rotated toward the installation surface.

Images