Focusing composition and projector provided with same

Abstract

The invention relates to a focusing composition which comprises a lens module group and a focusing key. The lens module group comprises an outer lens barrel and an inner lens barrel, wherein the inner lens barrel is installed in the outer lens barrel, and a lens is contained in the inner lens barrel. A guide groove and at least one cam groove are arranged on the side wall of the outer lens barrel. A guide pin engaged with the guide groove is extended out from the inner lens barrel along the radial direction thereof, a spacing groove corresponding to the cam groove is arranged on the side wallof the inner lens barrel, and the cam groove is obliquely arranged relative to a central axis of the inner lens barrel. A cam pin is outwards extended from the lens along the radial direction and penetrates through the spacing groove and the cam groove. The focusing key is matched with the outer lens barrel, and the lens moves along the axial direction of the lens module group when the focusing key is pushed along the axial direction of the lens module group. The lens of a projector provided by the invention can move along the axial direction of the lens module group to realize focusing through pushing and pressing the focusing key. The invention also provides a projector provided with the focusing composition.

Description

technical field [0001] The invention relates to a focus adjustment combination and a projector with the focus adjustment combination. Background technique [0002] With the development of projection technology, various types of projectors are widely used in business, teaching, home theater and other occasions. At the same time, miniature projectors have also been greatly developed and applied, especially handheld projectors, which can be used as a single Hand carry or give a presentation. At present, the projector generally consists of a projected image generating device, a lens module and a housing. Both the projected image generating device and the lens module are accommodated in the housing, and the projected image generating device generates an image to be projected and is projected through the lens module. In order to make the projected image clear, the lens module is often equipped with a rotating focus ring to adjust the focus of the lens module. However, it is cumb...

AI Technical Summary

Problems solved by technology

In order to make the projected image clear, the lens module is often equipped with a rotating focus ring to adjust the focus of the lens module. However, it is cumbersome to operate by rotating the focus ring, especially for handheld projection. camera, it is almost difficult to complete the focusing operation with one hand

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