JP2008293860A - Spotlight - Google Patents

Abstract

In a spotlight, a lamp can be stably supported regardless of its horizontal rotation position.
A spotlight (1) includes a housing (3) in which a ballast (2) for lighting a lamp body (4) is accommodated, and an arm (5) extending from the casing (3) and connected to the lamp body (4). The arm 5 has a shaft portion 53. A bearing portion 31 b that supports the shaft portion 53 is formed at the approximate center of the bottom surface portion 31 a of the housing 3. The shaft portion 53 of the arm 5 is supported by the bearing portion 31b so as to be horizontally rotatable around a normal L passing through the approximate center of the bottom surface portion 31a. For this reason, the load applied to the housing 3 due to the weight of the lamp body 4 can be distributed around the bearing portion 31b regardless of the horizontal rotation position of the lamp body 4. It can be stably supported regardless of the horizontal rotation position.
[Selection] Figure 5

Description

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

  Conventionally, a lamp body, a ballast for lighting the lamp body, and a housing for housing the ballast, the lamp body can be raised and lowered around a horizontal axis at one end of the housing, and A spotlight is known that is pivotably mounted around a vertical axis (see, for example, Patent Document 1). At one end of the housing, a swivel arm extends horizontally in a state of being rotatable about a vertical axis, and a lamp is connected to the tip of the swivel arm so as to be rotatable about the axis of the swivel arm. ing.

However, in the technique described in Patent Document 1, since the swing arm protrudes from the side end of the casing, the load applied to the casing from the root portion of the swing arm due to the weight of the lamp can be dispersed. difficult. For this reason, there exists a possibility that support of a lamp may become unstable.
JP 2000-82301 A

  The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a spotlight that stably supports a lamp regardless of its horizontal rotation position.

  In order to achieve the above object, a first aspect of the present invention is a spot comprising: a housing that houses a ballast for lighting a lamp; and an arm that extends from the casing and is connected to the lamp. In the light, the arm is supported at a substantially center of a bottom surface portion of the housing so as to be horizontally rotatable around a normal passing through the center.

  According to the first aspect of the present invention, the load applied to the housing due to the weight of the lamp can be dispersed around the lamp support portion of the bottom surface regardless of the horizontal rotation position of the lamp. . For this reason, the lamp can be stably supported regardless of its horizontal rotation position.

  Hereinafter, 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 1 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 housing 3 that houses a ballast 2 that turns on a light source, and an arm 5 that extends from the housing 3 and is connected to a lamp body 4. The lamp body 4 is attached to the lower end of the arm 5, a socket 6 to which a light source is attached, a light source 7 that is attached to the socket 6 and is driven to be lit by the ballast 2, and light emitted from the light source 7. A reflecting mirror 8 that reflects and a shade 9 that is rotatably supported at the lower end of the arm 5 and to which the reflecting mirror 8 is fixed are provided. The arm 5 is suspended and fixed from the housing 3 and is supported so as to be horizontally rotatable about a normal passing through the approximate center of the bottom surface of the housing 3.

  The ballast 2 is composed of, for example, an inverter type ballast. The housing 3 includes a housing body 31 having an upper surface opened and a cover 32 that closes the opening. The housing body 31 accommodates the ballast 2 and the plug 10 that supplies power to the ballast 2. The plug 10 is fixed to the cover 32 so that a part thereof is exposed in order to enable connection with a wiring duct (not shown). A hole (not shown) into which the end of the arm 5 is fitted is formed in the approximate center of the bottom surface of the housing body 31.

  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 shaft portion 53 that extends upward. The shaft portion 53 is inserted into a hole in the bottom surface portion of the housing body 31 and supported so that the arm 5 can be rotated horizontally. The distal end portion of the shaft portion 53 is inserted into the hole and penetrates into the housing main body 31. A rotation stopper 55 for restricting the rotation range is fitted to the distal end portion of the shaft portion 53 that penetrates into the housing body 31. Further, a nut 56 is attached to the most distal end portion of the shaft portion 53.

  A socket attachment portion 54 for attaching the socket 6 is formed at the lower end of the vertical portion 52. The socket mounting portion 54 has a substantially cylindrical shape, and protrudes in a direction substantially parallel to the horizontal portion 51 on the shaft portion 53 side. At the tip of the socket mounting portion 54, a part of the outer periphery is cut out to form a stepped portion 54a. The socket mounting portion 54 includes the socket 6 when the socket 6 is mounted. A base of the light source 7 is fixed to the socket 6. A lead wire (not shown) led out from the socket 6 is accommodated inside the arm 5 and led to the ballast 2 in the housing 3. The lead wire of the socket 6 guided by the arm 5 is connected to the ballast 2 in the housing body 31.

  The light source 7 is composed of, for example, a ceramic metal halide lamp. This ceramic metal halide lamp is tall and has a substantially cylindrical shape, and its base is, for example, a screw type. The light source 7 is arranged so that its longitudinal direction is substantially parallel to the horizontal direction. The longitudinal direction of the light source 7 and the protruding direction of the socket mounting portion 54 are substantially parallel. Further, the central axis of the light source 7 in the longitudinal direction and the central axis of the socket mounting portion 54 substantially coincide with each other. The configuration and shape of the light source 7 are not limited to the above.

  The reflecting mirror 8 has a substantially truncated cone shape or a bowl shape, and its diameter is larger than the length of the bulb portion of the light source 7. The reflecting mirror 8 is provided with openings 81 and 82 on the front surface and the back surface. The front opening 81 is a light emitting opening and has a larger diameter than the rear opening 82. The rear opening 82 is a heat dissipation opening. The light source 7 is arranged in front of the reflecting mirror 8 and so that the central axis in the longitudinal direction of the light source 7 is substantially parallel to the opening surface of the opening 81 of the reflecting mirror 8. Further, the light source 7 is arranged so that the center thereof overlaps the focal position of the reflecting mirror 8.

  The shade 9 is constituted by a saddle body 91 having a bowl-like shape with an open front surface and a substantially circular shape in front view, and a substantially annular front frame 92 having a size corresponding to the front opening of the shade body 91. The size of the shade body 91 corresponds to the size of the reflecting mirror 8, and the diameter of the shade body 91 is larger than the length of the bulb portion of the light source 7. A heat dissipation opening 91 a is provided on the back surface of the shade body 91, and the position of the opening 91 a corresponds to the heat dissipation opening 82 of the reflecting mirror 8. The front frame 92 is configured to be attachable to the shade main body 91 by being fitted into the front opening of the shade main body 91 and rotating. The reflecting mirror 8 is fitted from the front opening of the shade main body 91 and is pressed against the inside of the shade main body 91 by the fixing spring 11 and fixed. In this way, the shade body 91 includes the reflecting mirror 8. A front frame 92 is attached to the front opening of the shade body 91 in a state where the reflecting mirror 8 is included in the shade body 91.

  A substantially cylindrical bearing portion 91b is formed through the side portion of the shade body 91 so as to penetrate therethrough. The socket mounting portion 54 of the arm 5 is fitted into the bearing portion 91b. Since the central axis of the socket mounting portion 54 substantially coincides with the central axis of the light source 7 in the longitudinal direction, the shade 9 can be attached to the socket mounting portion 54 in a state where the socket mounting portion 54 is fitted into the bearing portion 91b. It becomes an axis, and is rotatable around the central axis in the longitudinal direction of the light source 7. For this reason, without moving the light source 7, the light irradiation direction can be changed upward or downward simply by rotating the shade 9 in the vertical direction, that is, in the elevation angle direction with the socket mounting portion 54 as an axis.

  A protruding rotation stopper 81c for restricting the rotation range of the shade 9 is formed inside the bearing portion 91b. The rotation range of the shade 9 is restricted by the rotation stopper 81c coming into contact with the stepped portion 54a when the socket mounting portion 54 is rotated. In addition, an arcuate leaf spring member 83 formed corresponding to the outer peripheral shape of the socket mounting portion 54 is disposed on the bearing portion 91b. The leaf spring member 83 is provided on the front opening side of the shade main body 91, and presses the socket mounting portion 54 inserted in the bearing portion 91 b toward the rear side of the shade main body 91. For this reason, it is possible to prevent the socket mounting portion 54 from falling off and ensure the axial force.

  4 (a), 4 (b) to 6 (a) to 6 (c) show the horizontal rotation structure of the arm 5 in the spotlight 1. FIG. A substantially cylindrical or substantially annular bearing portion 31b is formed at substantially the center of the bottom surface portion 31a of the housing body 31, and a hole 31c of the bearing portion 31b penetrates the housing body 31 in the vertical direction. The diameter of the hole 31 c is slightly larger than the outer diameter of the shaft portion 53 of the arm 5. The shaft portion 53 is inserted into the hole 31c from below. In this way, the arm 5 is supported so as to be horizontally rotatable about a normal L (shown by a one-dot chain line) passing through the approximate center of the bottom surface portion 31a of the housing body 31, and the shaft portion 53 is supported by the housing body. The bottom surface portion 31 a of the portion 31 is a portion that supports the lamp body 4.

  The distal end portion of the shaft portion 53 of the arm 5 penetrates into the housing main body 31. A substantially annular rotation stopper 55 is fitted to the tip of the shaft 53 that penetrates into the housing body 31. The outer diameter of the rotation stopper 55 is larger than the diameter of the hole 31c of the bearing portion 31b. Further, a nut 56 is attached to the most distal end portion of the shaft portion 53. The outer diameter of the nut 56 is larger than the inner diameter of the rotation stopper 55. For this reason, the rotation stopper 55 is held by the peripheral edge of the hole 31c and the nut or the like can be held by the rotation stopper 55 inside the casing body 31, so that the arm 5 falls off the casing body 31. Can be prevented.

  Further, the tip end portion of the shaft portion 53 has an outer diameter that is smaller than the lower portion, leaving a part. This remaining part protrudes more than the other part on the same outer periphery, and forms the protrusion part 53a. A protrusion 55 a that protrudes inward is formed on the inner peripheral portion of the rotation stopper 55. The number of the protrusions 55a is, for example, one. A protrusion 55 b that protrudes outward is formed on the outer periphery of the rotation stopper 55. The number of the protrusions 55b is, for example, two. The two protrusions 55b are disposed at an angle of approximately 180 degrees with respect to each other. A stopper 31 d having a substantially arc shape in plan view is provided on the inner side of the bottom surface of the housing body 31. The number is, for example, two. The stopper 31 d is formed along the outer periphery of the rotation stopper 55.

  When the shaft 53 rotates horizontally, the protrusion 55 a inside the rotation stopper 55 contacts the protruding portion 53 a at the tip of the shaft 53, thereby restricting the rotation range of the shaft 53. With this restriction, for example, the pivotable angle of the shaft portion 53 is approximately 300 degrees. After the protruding portion 53 a of the shaft portion 53 comes into contact with the protruding portion 55 a of the rotation stopper 55, the rotation stopper 55 is rotated along with the rotation of the shaft 53. During rotation of the rotation stopper 55, the stopper 31 d inside the housing body 31 abuts on the protrusion 55 b outside the rotation stopper 55, thereby restricting the rotation range of the rotation stopper 55. With this restriction, for example, the rotation angle of the rotation stopper 55 is approximately 65 degrees. Accordingly, since the total pivotable range of the shaft portion 53 is approximately 360 degrees, it is possible to irradiate light in any direction around the spotlight 1.

  In the above configuration, the bearing portion 31 b is formed on the bottom surface portion 31 a of the housing body 31. The shaft portion 53 of the arm 5 is inserted into the hole 31c of the bearing portion 31b from below, and is hooked to the upper peripheral portion of the hole 31c using a rotation stopper 55 and a nut 56. In this way, the lamp body 4 is suspended from the housing body 31, and the shaft portion 53 is supported by the bearing portion 31b so as to be horizontally rotatable around the normal line L. Therefore, the load applied to the housing body 31 due to the weight of the lamp body 4 can be distributed around the bearing portion 31b of the bottom surface portion 41a regardless of the horizontal rotation position of the lamp body 4. Moreover, since the position in the bottom face part 31a of the bearing part 31b is a substantially center, a load can be reliably disperse | distributed around the bearing part 31b. For this reason, the lamp 4 can be stably supported regardless of its horizontal rotation position.

  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 disassembled perspective view of the said spotlight. (A) is a perspective view when the shade part is removed from the arm part in the spotlight, and (b) is a perspective view of the arm part. (A) is the perspective view from diagonally downward when a lamp body is removed from a housing | casing in the said spotlight, (b) is a perspective view from a different direction from (a) of the spotlight. The fragmentary sectional view of the said spotlight. (A) is the front view of the said spotlight, (b) is the sectional view on the A-A 'line of (a), (c) is an enlarged view of the broken-line frame B part of (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Spotlight 2 Ballast 3 Case 31 Case main body 31a Bottom part 31b Bearing part 4 Lamp body 5 Arm 6 Socket 7 Light source 8 Reflector 9 Sede L Normal

Claims (1)

A housing in which a ballast for lighting the lamp is housed;
In a spotlight provided with an arm extending from the housing and connected to a lamp body,
The spotlight is characterized in that the arm is supported at the approximate center of the bottom surface of the housing so as to be horizontally rotatable around a normal passing through the approximate center.

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