JP2010262041A - Projection lens - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projection lens preventing itself from dropping in its replacement and improving efficiency of replacement work. <P>SOLUTION: The projector lens includes a first engagement part attachable to a projection type image display, a fixed part, and a rotational part which is rotatable to the fixed part. In the projection lens, a second engagement part is arranged in the first engagement part, the fixed part, or the rotational part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a projection type image display apparatus, and more particularly to a projection lens.

  In recent years, the number of projection-type image apparatuses using a projection lens exchange system has increased.

  Conventionally, it has been well known that a retrofitting member such as an accessory of a projection type image display apparatus is tied with a string to prevent the fall. For example, Patent Document 1 discloses a converter lens unit connection adapter and a projection-type image display device that are connected by a string to prevent dropping.

JP 2008-040147 A

  However, the conventional techniques disclosed in the above-mentioned patent documents are insufficient for preventing the fall when replacing the projection lens and improving the work efficiency.

  Therefore, an object of the present invention is to provide a projection lens that prevents a drop during replacement of the projection lens and improves the efficiency of the replacement work.

In order to achieve the above object, the present invention provides:
A first engaging portion attachable to the projection type image display device;
A fixed part;
A rotating part rotatable relative to the fixed part;
In a projection lens having
Providing a projection lens, wherein the first engaging portion, the fixing portion, or the rotating portion is provided with a second engaging portion.

  ADVANTAGE OF THE INVENTION According to this invention, the projection lens which prevents the fall at the time of replacement | exchange of a projection lens, and improves the efficiency of replacement | exchange operation | work can be provided.

Configuration of Projection Lens Body 100 and Projection Type Image Display Device 6 Configuration of the projection lens body 110 and the ceiling mount 7

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 shows a replaceable projection lens and a projection type image display apparatus according to an embodiment of the present invention.

  Hereinafter, the second engaging portion of the projection lens according to the first embodiment of the present invention will be described with reference to FIG.

  From this figure, a projection type image display device 6 and a projection lens main body 100 attached to the projection type image display device 6 are shown.

  The projection lens body 100 includes a fixed barrel 1 as a fixed portion, a cam ring 2 as a rotating portion that can rotate with respect to the fixed portion, and a mount as a first engaging portion that can be attached to a projection type image display device. 3, and a suspension holding engagement portion 4 as a second engagement portion.

  The projection type image display device 6 has a projection lens hanging holding portion 5, and the hanging holding engaging portion 4 of the projection lens main body 100 can be hung on the hanging holding portion 5 when the projection lens is replaced. It becomes composition.

  The suspension holding engagement portion 4 of the projection lens body 100 has a key shape, and is configured and held between the fixed barrel 1 and the cam ring 2 in the projection lens body 100. However, the suspension holding engagement portion 4 of the projection lens main body 100 may also serve as a part of a single component constituting the projection lens main body such as the fixed barrel 1, the cam ring 2, and the mount 3.

  Further, the fulcrum of the suspension holding engagement portion 4 of the projection lens main body 100 is provided on the light incident side from the center of gravity of the projection lens main body 100 so that the projection lens 100 is stable when suspended.

  Hereinafter, the second engaging portion of the projection lens according to the second embodiment of the present invention will be described with reference to FIG.

  This figure shows a bracket, a ceiling bracket 7 and a projection lens body 110 that are mounted on the ceiling in a ceiling-mounted state with the projection type image display device.

  The projection lens body 110 includes a fixed barrel 1 as a fixed portion, a cam ring 2 as a rotating portion that can rotate with respect to the fixed portion, and a mount as a first engaging portion that can be attached to the projection type image display device. 3 and a suspension holding engagement portion 14 as a second engagement portion.

  The ceiling hanger 7 has a suspension holding portion 15 of the projection lens body 110, and the suspension holding engagement portion 14 of the projection lens body 110 is suspended from the suspension holding portion 15 when the projection lens is replaced. It becomes the structure which can do.

  The suspension holding engagement portion 14 of the projection lens body 110 has a hole key shape, and is fastened to the fixed barrel 1 in the projection lens body 100 with the mount 3 with screws. However, similar to that shown in the first embodiment, the configuration in the projection lens may be held, or a part of the projection lens body constituting single component such as the fixed lens barrel 1, the cam ring 2, and the mount 3 may also serve.

  In addition, the suspension holding engagement portion 14 of the projection lens main body 110 has a hole shape, but it is within the scope of the gist if it can be configured to be suspended.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

DESCRIPTION OF SYMBOLS 1 Fixed barrel 2 Cam ring 3 Mount 4 Suspension holding engagement part (key shape)
5 Suspension holding part (projection type image display device)
6 Projection type image display device 7 Ceiling mount bracket 14 Suspension holding engagement part (hole shape)
15 Suspension holder (Ceiling bracket)
100 projection lens 110 projection lens

Claims (7)

A first engaging portion attachable to the projection type image display device;
A fixed part;
A rotating part rotatable relative to the fixed part;
In a projection lens having
A projection lens, wherein a second engagement portion is provided in the first engagement portion, the fixed portion, or the rotation portion.   The projection lens according to claim 1, wherein the second engaging portion has a shape that can be suspended and held.   The projection lens according to claim 2, wherein the shape that can be held suspended is a key shape.   The projection lens according to claim 2, wherein the shape that can be held suspended is a hole shape.   The projection lens according to claim 1, wherein the fulcrum of the second engagement portion is formed at a certain distance from the position of the center of gravity of the projection lens. A projection lens provided with a first engagement portion and a second engagement portion;
In the projection type image display device to which the first engagement portion of the projection lens is attached,
A projection-type image display device, wherein the projection-type image display device main body is provided with a suspension holding portion facing the second engagement portion of the projection lens. A projection lens provided with a first engagement portion and a second engagement portion;
In a projection type image display device system including a projection type image display device to which the first engagement portion of the projection lens is attached and a ceiling mount bracket for holding the projection type image display device in a ceiling,
A projection-type image display system characterized in that a ceiling holder is provided with a suspension holding portion facing the second engagement portion of the projection lens.