WO2018010235A1 - Focusing device for projection lens - Google Patents

Focusing device for projection lens Download PDF

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Publication number
WO2018010235A1
WO2018010235A1 PCT/CN2016/093427 CN2016093427W WO2018010235A1 WO 2018010235 A1 WO2018010235 A1 WO 2018010235A1 CN 2016093427 W CN2016093427 W CN 2016093427W WO 2018010235 A1 WO2018010235 A1 WO 2018010235A1
Authority
WO
WIPO (PCT)
Prior art keywords
lens group
lens
barrel
limiting
lens barrel
Prior art date
Application number
PCT/CN2016/093427
Other languages
French (fr)
Chinese (zh)
Inventor
高志强
赵远
梅良
林清云
Original Assignee
广景视睿科技（深圳）有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 广景视睿科技（深圳）有限公司 filed Critical 广景视睿科技（深圳）有限公司
Publication of WO2018010235A1 publication Critical patent/WO2018010235A1/en

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Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details

Definitions

  • the present invention relates to the field of digital projection display technology, and more particularly to a projection lens focusing device.
  • the distance between the projection device and the projection surface projected by the projected image is different due to the use of the scene; generally, the focal length of the lens is adjusted accordingly, and the function of the focusing device is to compensate various The defocus caused by the factor can obtain a clearer projection picture.
  • the commonly used projector focusing method is to set the focusing ring on the exposed end of the lens, and rotate the focusing ring to drive the lens to move back and forth along the optical axis of the lens to achieve focusing. This conventional focusing method is not enough. It is quick and easy, and can't be fine-tuned by the focus of the lens itself.
  • an object of the present invention is to provide a projection lens focusing device that is simple in structure, convenient in focusing, especially fine-tuning, and has good stability, and can quickly and accurately adjust the focal length.
  • the present invention provides: a front lens group lens barrel, a rear lens group lens barrel, a flanged outer sleeve, an adjusting slider, an adjusting lever, a limiting post and a guiding column;
  • the front lens group barrel is provided with a first limiting surface for limiting the axial movement of the front lens group barrel
  • the rear lens group lens barrel is provided with a moving groove, a first limiting column hole and a first guiding column hole;
  • the outer sleeve is provided with an oblique annular groove, a second limiting column hole, and a second guiding a post hole and a second limiting surface for limiting axial movement of the lens group of the rear lens group;
  • the limiting post is fixedly connected to the lens barrel of the front lens group through the first limiting post hole and the second limiting post hole;
  • the guiding post is fixedly connected to the rear lens group lens barrel through the first guiding post hole and the second guiding post hole;
  • the adjusting slider is inserted
  • the front lens group lens barrel is divided into a front section (10a) and a rear section (10b), and the front section (10a) and the rear section (10b) are both circular tubular structures; the front section (10a) The outer diameter is larger than the outer diameter of the rear section (10b); the first limiting surface is disposed on the joint surface of the front section (10a) and the rear section (10b).
  • the front section (10a) and the rear section (10b) of the front lens group barrel sleeve are integrally formed.
  • the outer diameter of the rear section (10b) of the front lens group lens barrel is slightly smaller than the inner diameter of the connecting portion of the lens barrel of the rear lens group and the lens barrel of the front lens group, and the rear section (10b) of the lens barrel of the front lens group After entering the lens barrel, the rear section of the front lens group (1 Ob) and the rear lens group lens barrel are damped.
  • the second limiting surface is disposed on the second limiting post hole adjacent to the end surface of the front lens group lens barrel.
  • the rear lens group lens barrel is divided into a front section (20a) and a rear section (20b), the rear section (20b) is provided with a protruding torus surface, and the moving section is between the front section (20a) and the protruding torus surface.
  • the outer diameter of the front section (20a) is greater than or equal to the outer diameter of the projection annulus S3, and the outer diameter of the projection annulus S3 is larger than the outer diameter of the other portions of the rear section (20b).
  • the front section (20a) and the rear section (20b) of the rear lens group lens barrel are integrally formed.
  • the adjustment slider is a semi-circular orphan structure, and can be disposed on the lens barrel of the rear lens group.
  • the moving groove fits snugly.
  • the moving groove is a semi-annular groove or an annular groove.
  • the adjustment lever and the adjustment slider are threaded links.
  • the projection lens focusing device comprises: a front lens group lens barrel, a rear lens group lens barrel, an outer sleeve, an adjustment slider, an adjustment lever, a limiting column and a guiding a first limiting surface is disposed on the lens barrel of the front lens group; a moving groove, a first limiting column hole, and a first guiding column hole are disposed on the lens barrel of the rear lens group;
  • the utility model is provided with an oblique annular groove, a second limiting column hole, a second guiding column hole and a second limiting surface; the focusing mode of the projection module of the projection module has a simple structure, and the focusing, especially the fine adjustment, is convenient and fast, and can be realized before
  • the change of the relative position of the focal lens group and the rear lens group provides better resolution and stability for different positions, and can quickly and accurately adjust the focal length to achieve an ideal projection effect.
  • FIG. 1 is an exploded view of an embodiment of a projection lens focusing device of the present invention
  • FIG. 2 is a combined structural view of an embodiment of a projection lens focusing device of the present invention
  • FIG. 3 is a schematic view of a lens barrel of a front lens group of a projection lens focusing device of the present invention
  • FIG. 4 is a schematic view of a lens barrel of a lens group of a projection lens focusing device of the present invention.
  • the projection lens focusing device of the present invention comprises: a front lens group lens barrel 10, a rear lens group lens barrel 20, and a belt a flanged outer sleeve 30, an adjusting slider 40, an adjusting lever 50, a limiting post 60 and a guiding post 70;
  • the front lens group lens barrel 10 is provided with an axial movement for restricting the front lens group lens barrel a first limiting surface S1;
  • the rear lens group barrel 20 is provided with a moving groove 21, a first limiting post hole 23, and a first guiding post hole 22;
  • the outer sleeve 30 is provided with an oblique ring
  • the slot 31, the second limiting post hole 33, the second guiding post hole 32 and the second limiting surface S2 for limiting the axial movement of the rear lens group lens barrel.
  • the first limiting post hole 23, the second limiting post hole 33, and the second guiding post hole 32 may be disposed as a through hole; the first guiding post hole 22 is disposed as a non-through hole;
  • the annular groove 31 is a through groove penetrating the outer sleeve 30.
  • 3 is a schematic view of a front lens group lens barrel of a projection lens focusing device according to the present invention; as shown in FIG. 3, the front lens group lens barrel 10 is divided into a front segment 10a and a rear segment 10b, and a front segment 10a.
  • the rear section 10b is a circular tubular structure, the outer diameter of the front section 10a is larger than the outer diameter of the rear section 10b, and the front section 10a and the rear section 10b can be integrally formed, or can be pasted, spliced or connected. The pieces are connected together.
  • 4 is a schematic view of a lens assembly lens barrel of a projection lens focusing device of the present invention; as shown in FIG. 4, the rear lens group lens barrel sleeve 20 is divided into a front segment 20a and a rear segment 20b, and the rear segment 20b is disposed.
  • a circumferentially extending annular surface S3, a moving groove 21 is disposed between the front section 20a and the protruding annular surface S3; the moving groove 21 is disposed along a radial circumference of the rear lens group lens barrel 20, and the outer diameter of the front section 20a is greater than or equal to the protruding ring
  • the outer diameter of the surface S3, the outer diameter of the protruding annular surface S3 is larger than the outer diameter of the other portions of the rear portion 20b; the front portion 20a and the rear portion 20b may be integrally formed, or may be integrally joined by a bonding or connecting member.
  • the outer diameter of the front lens group 10 0 rear section 10b is slightly smaller than the inner diameter of the front lens section 20 front section 20a, so that the front lens group lens barrel 10 and the rear lens group lens barrel sleeve 20 are connected, the front lens group
  • the rear section 10b of the lens barrel sleeve 10 is fitted into the front section 20a of the rear lens group lens barrel sleeve 20.
  • the rear section 10b of the front lens group barrel 10 and the front section 20a of the rear lens group barrel 20 are dampedly connected with damping oil disposed therebetween.
  • the outer diameter of the front section 20a is slightly smaller than the inner diameter of the outer sleeve 30, so that the rear lens group lens sleeve 20 can be inserted into the outer sleeve 30 to form a damped connection with the outer sleeve 30.
  • the moving groove 21 may also be a section of the groove provided on the rear lens group barrel sleeve 20, which is directly an annular or partial annular groove disposed on the rear lens group barrel sleeve 20 in the circumferential direction.
  • the outer diameter of the groove portion is smaller than the outer diameter of the other portions of the lens group sleeve 20 of the rear lens group.
  • the rear section 10b of the front lens group lens sleeve 10 is inserted into the front section 20a of the rear lens group lens barrel sleeve 20, and the adjustment slider 40 is placed in the movement groove 21 to be disposed on the rear lens.
  • the moving groove 21 on the rear section 20b of the group lens barrel 20 is closely attached and movable in the circumferential direction of the moving groove 21; the outer sleeve 30 is then fitted to the outside of the rear lens group lens barrel cover 20.
  • the positions of the first limiting post hole 23 and the second limiting post hole 33 are coincident or partially coincident, and the positions of the first guiding post hole 22 and the second guiding post hole 32 are coincident or partially coincident.
  • the limiting post 60 is fixedly connected to the front lens group lens barrel 10 through the first limiting post hole 23 and the second limiting post hole 33;
  • the guiding post 70 passes through the first guiding post hole 22 and the second guide post hole 32 are fixedly coupled to the rear lens group lens barrel 20;
  • the oblique annular groove 31 on the outer sleeve 30 corresponds to the position of the moving groove 21, and the adjustment lever 50 passes through the outer casing
  • the oblique annular groove 31 on the barrel 30 is fixedly coupled to the adjustment slider 40.
  • the adjustment lever 50 When focusing the projection lens focusing device, the adjustment lever 50 is manually moved, so that the adjustment lever 50 drives the adjustment slider 40 to move along the oblique annular groove 31 of the outer sleeve 30, and the motion can be decomposed into The movement in the circumferential direction of the moving groove 21 of the lens group 20 of the rear lens group and the linear motion of the front and rear directions in the optical axis direction of the projection lens. Due to the action of the limiting post 60 and the guiding post 70, the reciprocating motion of the adjusting slider 40 in the oblique annular groove 31 can drive the rear lens group lens barrel 20 to linearly move forward and backward in the axial direction in the outer sleeve 30.
  • the rear lens group lens barrel 20 is attached to the rear lens group during the linear motion of the front lens group lens barrel 10 in the optical axis direction (ie, the direction toward the front lens group lens barrel 10).
  • the front lens group lens 10 moves forward, and the rear lens group lens barrel 20 continues to move forward, thereby changing
  • the spacing between the front and rear lens groups in the lens barrel achieves the purpose of focusing; in the process of the linear movement of the rear lens group lens barrel 20 in the optical axis direction at the same time as the front lens group lens barrel 10, the outer sleeve 30
  • the front lens group lens barrel 10 stops moving backward, and the rear lens group lens barrel 20 continues to move backward, thereby changing the front and rear lenses in the lens barrel.
  • the spacing between the groups is achieved for the purpose of focusing.
  • the front lens group lens barrel 10 and the rear lens group lens barrel 20 are damped by using damping oil, the front lens group lens barrel 10 and the rear lens group lens barrel are not in contact with any limiting surface in the axial direction. 20 Keep the relative position unchanged and move together.
  • the adjusting slider 40 is a semicircular orphaned structure, and the moving groove 21 is a semi-annular groove or an annular groove; the adjusting slider 40 can be disposed on the rear section 20b of the rear lens group lens barrel 20
  • the adjusting slot 20 is closely fitted, and the adjusting slider 40 can be inserted into the moving slot 21 by means of embedding or the like so as to be movable in the moving direction of the moving slot 21 in the moving slot 21;
  • the adjusting lever 50 and the adjusting slider 40 are Threaded link.
  • the fixed connection includes a pasting, a splicing or a connector connection.
  • the limiting post hole and the guiding post hole on the rear lens group lens barrel 20 and/or the outer sleeve 30 are not limited to the embodiment, and the limiting column hole and the guiding column can be adjusted as needed.
  • the first limiting surface S1 for limiting the axial movement of the lens group of the front lens group and the second limiting surface S2 for limiting the axial movement of the lens barrel of the rear lens group are not limited to use in the embodiment.
  • the limitation of the axial movement of the front lens group lens barrel and the rear lens group lens barrel can also be achieved by other similar limiting surfaces.
  • a limiting hole may be disposed on the lens barrel of the front lens group, and the first limiting surface is disposed near the lens barrel of the rear lens group; or in front of the lens barrel of the rear lens group
  • the second limiting surface S2 is disposed on the connecting surface of the segment and the rear segment; and so on, as long as the set limiting surface can be used to limit the axial movement of the front lens group lens barrel and the rear lens group lens barrel within a certain range.
  • the focusing mode of the projection module of the projection module has a simple structure, and the focus adjustment, especially the fine adjustment, is convenient and fast, and the relative position of the front focus lens group and the rear foot lens group can be changed, and the resolution of different positions is more. Good, good stability, can quickly and accurately adjust the focal length to achieve the desired projection effect.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Projection Apparatus (AREA)
  • Lens Barrels (AREA)

Abstract

Disclosed is a focusing device for a projection lens, comprising: a front lens group barrel (10), a rear lens group barrel (20), an outer sleeve (30) with a flange, an adjustment slider (40), an adjustment deflector rod (50), limiting posts (60) and guide posts (70). The front lens group barrel is provided with a first limiting surface (S1); the rear lens group barrel is provided with a movable groove (21), and a first limiting hole (23) and a first guide post hole (22); and the outer sleeve is provided with a slant annular groove (31), a second limiting hole (33), a second guide post hole (32), and a second limiting surface (S2). The focusing device for a projection lens has a simple focusing structure, makes focusing easy and quick, can achieve changes in the relative position of a front lens group and a rear lens group, has a better resolution of scenes at different positions, is more stable, and can quickly and accurately adjust the focal length to achieve desired projection effects.

Description

一种投影镜头调焦装置  Projection lens focusing device
技术领域 Technical field
本发明涉及数字投影显示技术领域， 更具体地说， 涉及一种投影镜头 调焦装置。  The present invention relates to the field of digital projection display technology, and more particularly to a projection lens focusing device.
背景技术 随着科学技术的发展， 特别是半导体技术的推动， 便携式的电子设备 被不断的设计制造出来。 便携式电子设备功能的提升， 使得用户对人机界 面的显示器件的要求越来越向着微型、 大屏幕以及高分辨率方向发展。 在 广大用户强烈需求的促使下， 近年来投影机技术发展迅猛， DLP、 LC0S 等 产品纷纷推出了性能高、 尺寸小且重量轻的便携式的投影机。 BACKGROUND OF THE INVENTION With the development of science and technology, especially the promotion of semiconductor technology, portable electronic devices are continuously designed and manufactured. The enhancement of the functions of portable electronic devices has made users' requirements for display devices on the human-machine interface more and more oriented toward micro, large screen and high resolution. Driven by the strong demand of users, projector technology has developed rapidly in recent years. DLP, LC0S and other products have introduced portable projectors with high performance, small size and light weight.
在投影领域中， 由于使用场景的不同， 投影设备与其所投影图像所投 射的投影面的距离也有所不同； 一般要对镜头的焦距进行相应的调节， 调 焦装置的作用是用来补偿各种因素引起的离焦， 可获得更清晰的投影画面。 常用的投影仪调焦方法， 是将调焦环套在镜头外露端， 通过转动调焦环驱 动镜头沿镜头的光轴方向前后移动实现调焦， 这种惯用的调焦方法搡作起 来较为不够快捷方便， 同时受镜头本身调焦行程的影响无法再进行微调。  In the field of projection, the distance between the projection device and the projection surface projected by the projected image is different due to the use of the scene; generally, the focal length of the lens is adjusted accordingly, and the function of the focusing device is to compensate various The defocus caused by the factor can obtain a clearer projection picture. The commonly used projector focusing method is to set the focusing ring on the exposed end of the lens, and rotate the focusing ring to drive the lens to move back and forth along the optical axis of the lens to achieve focusing. This conventional focusing method is not enough. It is quick and easy, and can't be fine-tuned by the focus of the lens itself.
发明内容 针对上述技术问题， 本发明的目的在于提供一种结构简单， 调焦尤其 是微调方便快捷、 稳定性好， 可以快速准确的调节焦距的投影镜头调焦装 置。 为实现上述目的， 本发明提供了包括： 前镜片组镜筒、 后镜片组镜筒、 带有法兰的外套筒、 调节滑块、 调节拨杆、 限位柱以及导向柱； 所述前镜 片组镜筒上设置有用于限制前镜片组镜筒轴向运动的第一限位面； 所述后 镜片组镜筒上设置有移动槽、 第一限位柱孔、 第一导向柱孔； 所述外套筒 上设置有斜向环形槽、 第二限位柱孔、 第二导向柱孔以及用于限制后镜片 组镜筒轴向运动的第二限位面； 所述限位柱穿过第一限位柱孔和第二限位 柱孔与前镜片组镜筒固定连接， 所述导向柱穿过第一导位柱孔和第二导向 柱孔与后镜片组镜筒固定连接； 所述调节滑块置入移动槽并可沿移动槽的 圆周方向移动， 调节拨杆穿过所述外套筒上的斜向环形槽与调节滑块固定 连接。 优选地， 所述前镜片组镜筒套分为前段（1 0a)和后段（1 0b)， 前段（1 0a) 和后段（1 0b)均为圆形管状结构； 所述前段（10a)的外径大于后段（1 0b)的外 径； 所述第一限位面设置在前段（1 0a)和后段（1 0b)的连接面上。 优选地， 所述前镜片组镜筒套的前段（1 0a)和后段（1 0b)—体成型。 优选地， 所述前镜片组镜筒后段（ 1 0b)的外径稍小于后镜片组镜筒与前 镜片组镜筒连接部分的内径， 前镜片组镜筒的后段（1 0b)套入后镜片组 镜筒的内部， 前镜片组镜筒的后段（1 Ob)与后镜片组镜筒为阻尼连接。 优选地， 所述第二限位面设置在第二限位柱孔上靠近前镜片组镜筒的 端面上。 优选地， 所述后镜片组镜筒套分为前段（20a)和后段（20b)，所述后段（20b) 设置一突起环面， 前段（20a)和突起环面之间为移动槽； 前段（20a)的外径 大于或等于突起环面 S3的外径， 突起环面 S3的外径大于后段（20b)其他部 分的外径。 优选地， 所述后镜片组镜筒套的前段（20a)和后段（20b)—体成型。 优选地， 所述调节滑块为半圆孤形结构， 可与设置在后镜片组镜筒上 的移动槽紧密贴合。 优选地， 所述移动槽为半环形槽或者环形槽。 优选地， 所述调节拨杆与调节滑块为螺紋链接。 SUMMARY OF THE INVENTION In view of the above technical problems, an object of the present invention is to provide a projection lens focusing device that is simple in structure, convenient in focusing, especially fine-tuning, and has good stability, and can quickly and accurately adjust the focal length. In order to achieve the above object, the present invention provides: a front lens group lens barrel, a rear lens group lens barrel, a flanged outer sleeve, an adjusting slider, an adjusting lever, a limiting post and a guiding column; the front lens group barrel is provided with a first limiting surface for limiting the axial movement of the front lens group barrel The rear lens group lens barrel is provided with a moving groove, a first limiting column hole and a first guiding column hole; the outer sleeve is provided with an oblique annular groove, a second limiting column hole, and a second guiding a post hole and a second limiting surface for limiting axial movement of the lens group of the rear lens group; the limiting post is fixedly connected to the lens barrel of the front lens group through the first limiting post hole and the second limiting post hole; The guiding post is fixedly connected to the rear lens group lens barrel through the first guiding post hole and the second guiding post hole; the adjusting slider is inserted into the moving groove and can move along the circumferential direction of the moving groove, and the adjusting rod is worn An oblique annular groove on the outer sleeve is fixedly coupled to the adjustment slider. Preferably, the front lens group lens barrel is divided into a front section (10a) and a rear section (10b), and the front section (10a) and the rear section (10b) are both circular tubular structures; the front section (10a) The outer diameter is larger than the outer diameter of the rear section (10b); the first limiting surface is disposed on the joint surface of the front section (10a) and the rear section (10b). Preferably, the front section (10a) and the rear section (10b) of the front lens group barrel sleeve are integrally formed. Preferably, the outer diameter of the rear section (10b) of the front lens group lens barrel is slightly smaller than the inner diameter of the connecting portion of the lens barrel of the rear lens group and the lens barrel of the front lens group, and the rear section (10b) of the lens barrel of the front lens group After entering the lens barrel, the rear section of the front lens group (1 Ob) and the rear lens group lens barrel are damped. Preferably, the second limiting surface is disposed on the second limiting post hole adjacent to the end surface of the front lens group lens barrel. Preferably, the rear lens group lens barrel is divided into a front section (20a) and a rear section (20b), the rear section (20b) is provided with a protruding torus surface, and the moving section is between the front section (20a) and the protruding torus surface. The outer diameter of the front section (20a) is greater than or equal to the outer diameter of the projection annulus S3, and the outer diameter of the projection annulus S3 is larger than the outer diameter of the other portions of the rear section (20b). Preferably, the front section (20a) and the rear section (20b) of the rear lens group lens barrel are integrally formed. Preferably, the adjustment slider is a semi-circular orphan structure, and can be disposed on the lens barrel of the rear lens group. The moving groove fits snugly. Preferably, the moving groove is a semi-annular groove or an annular groove. Preferably, the adjustment lever and the adjustment slider are threaded links.
与现有技术相比， 本发明具有如下有益效果： 投影镜头调焦装置包括： 前镜片组镜筒、 后镜片组镜筒、 外套筒、 调节滑块、 调节拨杆、 限位柱以 及导向柱； 所述前镜片组镜筒上设置有第一限位面； 所述后镜片组镜筒上 设置有移动槽、 第一限位柱孔、 第一导向柱孔； 所述外套筒上设置有斜向 环形槽、 第二限位柱孔、 第二导向柱孔以及第二限位面； 该投影模组调焦 装置调焦方式结构简单， 调焦尤其是微调方便快捷、 可实现前焦镜片组与 后脚镜片组的相对位置的变化， 对不同位置的画面解析度更佳，稳定性好， 可以快速准确的调节焦距， 达到理想的投影效果。  Compared with the prior art, the invention has the following beneficial effects: The projection lens focusing device comprises: a front lens group lens barrel, a rear lens group lens barrel, an outer sleeve, an adjustment slider, an adjustment lever, a limiting column and a guiding a first limiting surface is disposed on the lens barrel of the front lens group; a moving groove, a first limiting column hole, and a first guiding column hole are disposed on the lens barrel of the rear lens group; The utility model is provided with an oblique annular groove, a second limiting column hole, a second guiding column hole and a second limiting surface; the focusing mode of the projection module of the projection module has a simple structure, and the focusing, especially the fine adjustment, is convenient and fast, and can be realized before The change of the relative position of the focal lens group and the rear lens group provides better resolution and stability for different positions, and can quickly and accurately adjust the focal length to achieve an ideal projection effect.
附图说明 DRAWINGS
图 1 是本发明的一种投影镜头调焦装置实施例爆炸图；  1 is an exploded view of an embodiment of a projection lens focusing device of the present invention;
图 2是本发明的一种投影镜头调焦装置实施例组合结构图；  2 is a combined structural view of an embodiment of a projection lens focusing device of the present invention;
图 3是本发明的一种投影镜头调焦装置前镜片组镜筒示意图； 图 4是本发明的一种投影镜头调焦装置后镜片组镜筒示意图。 具体实施方式 下面结合附图， 对本发明的具体实施方式进行详细描述， 但应当理解 本发明的保护范围并不受具体实施方式的限制。 除非另有其它明确表示， 否则在整个说明书和权利要求书中， 术语"包 括" 或其变换如 "包含" 或 "包括有" 等等将被理解为包括所陈述的元件 或组成部分， 而并未排除其它元件或其它组成部分。 图 1 是本发明的一种投影镜头调焦装置实施例爆炸图； 如图 1 所示， 本发明的投影镜头调焦装置包括： 前镜片组镜筒 1 0、 后镜片组镜筒 20、 带 有法兰的外套筒 30、调节滑块 40、 调节拨杆 50、 限位柱 60以及导向柱 70 ; 所述前镜片组镜筒 1 0上设置有用于限制前镜片组镜筒轴向运动的第一限位 面 S1 ; 所述后镜片组镜筒 20上设置有移动槽 21、 第一限位柱孔 23、 第一 导向柱孔 22 ; 所述外套筒 30上设置有斜向环形槽 31、 第二限位柱孔 33、 第二导向柱孔 32以及用于限制后镜片组镜筒轴向运动的第二限位面 S2。 其中， 所述第一限位柱孔 23， 第二限位柱孔 33， 以及第二导向柱孔 32 可以设置为通孔； 所述第一导向柱孔 22设置为非通孔； 所述斜向环形槽 31 为穿透外套筒 30的通槽。 图 3是本发明的一种投影镜头调焦装置前镜片组镜筒示意图； 如图 3 所示， 所述前镜片组镜筒套 1 0分为前段 1 0a和后段 1 0b， 前段 1 0a和后段 1 0b均为圆形管状结构， 所述前段 1 0a 的外径大于后段 1 0b 的外径， 前段 1 0a和后段 1 0b可以一体成型，也可以通过粘贴，烊接或连接件连接成一体。 图 4 是本发明的一种投影镜头调焦装置后镜片组镜筒示意图； 如图 4 所示，所述后镜片组镜筒套 20分为前段 20a和后段 20b，所述后段 20b设置 一沿圆周的突起环面 S3， 前段 20a和突起环面 S3之间设置有移动槽 21； 移动槽 21 沿后镜片组镜筒 20的径向圆周设置， 前段 20a的外径大于或等 于突起环面 S3的外径， 突起环面 S3的外径大于后段 20b其他部分的外径； 前段 20a和后段 20b可以一体成型，也可以通过粘贴或连接件连接成一体。， 前镜片组镜筒 1 0后段 1 0b的外径稍小于后镜片组镜筒 20前段 20a内径， 使得前镜片组镜筒套 1 0和后镜片组镜筒套 20连接时， 前镜片组镜筒套 1 0 的后段 1 0b套入后镜片组镜筒套 20的前段 20a。所述前镜片组镜筒 1 0的后 段 1 0b与后镜片组镜筒 20的前段 20a为阻尼连接，两者之间设置有阻尼油。 其中， 前段 20a的外径稍小于外套筒 30的内径， 使得后镜片组镜筒套 20可以套入到外套筒 30内， 与外套筒 30形成阻尼连接。 所述移动槽 21 也可以是后镜片组镜筒套 20上设置的一段凹槽， 直接 是后镜片组镜筒套 20上沿圆周方向设置的环形或部分环形凹槽。 凹槽部分 的外径小于后镜片组镜筒套 20其他部分的外径。 图 2是本发明的一种投影镜头调焦装置实施例组合结构图； 如图 2所 示， 所述前镜片组镜筒 1 0、 后镜片组镜筒 20 以及外套筒 30三者组合时， 先将前镜片组镜筒套 1 0的后段 1 0b套入后镜片组镜筒套 20的前段 20a内， 将所述调节滑块 40置入移动槽 21，使其与设置在后镜片组镜筒 20后段 20b 上的移动槽 21 紧密贴合并可沿移动槽 21 的圆周方向移动；再将外套筒 30 套到后镜片组镜筒套 20外部。 其中， 组合后使得第一限位柱孔 23和第二限位柱孔 33的位置重合或 部分重合， 第一导向柱孔 22和第二导向柱孔 32的位置重合或部分重合。 组合连接后， 所述限位柱 60穿过第一限位柱孔 23和第二限位柱孔 33与前 镜片组镜筒 1 0固定连接； 所述导向柱 70穿过第一导向柱孔 22和第二导向 柱孔 32与后镜片组镜筒 20 固定连接； 所述外套筒 30上的斜向环形槽 31 与移动槽 21 的位置相对应， 调节拨杆 50穿过所述外套筒 30上的斜向环形 槽 31 与调节滑块 40固定连接。 对投影镜头调焦装置进行调焦时， 用手拨动调节拨杆 50， 使得调节拨 杆 50带动调节滑块 40沿外套筒 30的斜向环形槽 31 做运动， 所述运动可 分解为沿后镜片组镜筒 20的移动槽 21 的圆周方向的运动以及沿投影镜头 光轴方向的前后直线运动。 由于限位柱 60和导向柱 70的作用， 调节滑块 40在斜向环形槽 31 内的往复运动可以带动后镜片组镜筒 20在外套筒 30内 沿轴向做前后直线运动。 同时由于调节滑块 40沿外套筒 30的斜向环形槽 31 做圆周方向运动， 可以相对增加位移长度， 实现前后直线运动方向的微 调。 后镜片组镜筒套 20在与前镜片组镜筒 1 0 同时沿光轴方向向前 （即向 着前镜片组镜筒 1 0的方向） 做直线运动的过程中， 当附在后镜片组镜筒套 20上的限位柱 60与外套筒 30上的第二限位面 S2接触后， 前镜片组镜筒 1 0向前运动停止， 后镜片组镜筒 20继续向前运动， 从而改变镜筒中前后镜 片组之间的间距达到调焦的目的；在后镜片组镜筒 20在与前镜片组镜筒 1 0 同时沿光轴方向向后做直线运动的过程中， 当外套筒 30的前端接触前镜片 组镜筒 1 0上的第一限位面 S1 后， 使前镜片组镜筒 1 0停止向后运动， 后镜 片组镜筒 20继续向后运动， 从而改变镜筒中前后镜片组之间的间距达到调 焦的目的。 由于前镜片组镜筒 1 0 与后镜片组镜筒 20之间使用阻尼油进行 阻尼连接， 在轴向不接触任何限位面的情况下， 前镜片组镜筒 1 0与后镜片 组镜筒 20保持相对位置不变， 一起运动。 在本实施例中， 所述调节滑块 40为半圆孤形结构， 所述移动槽 21 为 半环形槽或者环形槽；调节滑块 40可与设置在后镜片组镜筒 20后段 20b上 的移动槽 21 紧密贴合， 调节滑块 40可以通过嵌入等方式置入移动槽 21， 使其可以在移动槽 21 内沿移动槽 21 圆周方向运动； 所述调节拨杆 50与调 节滑块 40为螺紋链接。 本实施例中， 所述固定连接包括粘贴， 烊接或连接件连接。 值得注意的是， 所述后镜片组镜筒 20和 /或外套筒 30上的限位柱孔和 导向柱孔并不限制于实施例的方式， 可根据需要调整限位柱孔和导向柱孔 的位置与个数。 本实施例中， 用于限制前镜片组镜筒轴向运动的第一限位面 S1 以及用 于限制后镜片组镜筒轴向运动的第二限位面 S2不限于使用本实施例所述的 具体方式， 也可以通过其他类似的限位面实现对前镜片组镜筒以及后镜片 组镜筒轴线运动的限制。 比如， 可以在前镜片组镜筒上设置限位孔， 将限 位孔的靠近后镜片组镜筒的部位设置第一限位面； 或者在后镜片组镜筒前 段和后段的连接面上设置第二限位面 S2 ; 等等， 只要能够保证设置的限位 面可以用以限制前镜片组镜筒和后镜片组镜筒在一定范围内的轴向运动即 可。 综上所述， 该投影模组调焦装置调焦方式结构简单， 调焦尤其是微调 方便快捷、 可实现前焦镜片组与后脚镜片组的相对位置的变化， 对不同位 置的画面解析度更佳，稳定性好， 可以快速准确的调节焦距， 达到理想的投 影效果。 3 is a schematic view of a lens barrel of a front lens group of a projection lens focusing device of the present invention; and FIG. 4 is a schematic view of a lens barrel of a lens group of a projection lens focusing device of the present invention. The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings, but it is understood that the scope of the present invention is not limited by the specific embodiments. The term "comprising" or variations such as "comprises" or "comprising", etc., are to be understood to include the recited elements or components throughout the specification and claims. Other components or other components are not excluded. 1 is an exploded view of an embodiment of a projection lens focusing device of the present invention; as shown in FIG. 1, the projection lens focusing device of the present invention comprises: a front lens group lens barrel 10, a rear lens group lens barrel 20, and a belt a flanged outer sleeve 30, an adjusting slider 40, an adjusting lever 50, a limiting post 60 and a guiding post 70; the front lens group lens barrel 10 is provided with an axial movement for restricting the front lens group lens barrel a first limiting surface S1; the rear lens group barrel 20 is provided with a moving groove 21, a first limiting post hole 23, and a first guiding post hole 22; the outer sleeve 30 is provided with an oblique ring The slot 31, the second limiting post hole 33, the second guiding post hole 32 and the second limiting surface S2 for limiting the axial movement of the rear lens group lens barrel. The first limiting post hole 23, the second limiting post hole 33, and the second guiding post hole 32 may be disposed as a through hole; the first guiding post hole 22 is disposed as a non-through hole; The annular groove 31 is a through groove penetrating the outer sleeve 30. 3 is a schematic view of a front lens group lens barrel of a projection lens focusing device according to the present invention; as shown in FIG. 3, the front lens group lens barrel 10 is divided into a front segment 10a and a rear segment 10b, and a front segment 10a. And the rear section 10b is a circular tubular structure, the outer diameter of the front section 10a is larger than the outer diameter of the rear section 10b, and the front section 10a and the rear section 10b can be integrally formed, or can be pasted, spliced or connected. The pieces are connected together. 4 is a schematic view of a lens assembly lens barrel of a projection lens focusing device of the present invention; as shown in FIG. 4, the rear lens group lens barrel sleeve 20 is divided into a front segment 20a and a rear segment 20b, and the rear segment 20b is disposed. A circumferentially extending annular surface S3, a moving groove 21 is disposed between the front section 20a and the protruding annular surface S3; the moving groove 21 is disposed along a radial circumference of the rear lens group lens barrel 20, and the outer diameter of the front section 20a is greater than or equal to the protruding ring The outer diameter of the surface S3, the outer diameter of the protruding annular surface S3 is larger than the outer diameter of the other portions of the rear portion 20b; the front portion 20a and the rear portion 20b may be integrally formed, or may be integrally joined by a bonding or connecting member. The outer diameter of the front lens group 10 0 rear section 10b is slightly smaller than the inner diameter of the front lens section 20 front section 20a, so that the front lens group lens barrel 10 and the rear lens group lens barrel sleeve 20 are connected, the front lens group The rear section 10b of the lens barrel sleeve 10 is fitted into the front section 20a of the rear lens group lens barrel sleeve 20. The rear section 10b of the front lens group barrel 10 and the front section 20a of the rear lens group barrel 20 are dampedly connected with damping oil disposed therebetween. Wherein, the outer diameter of the front section 20a is slightly smaller than the inner diameter of the outer sleeve 30, so that the rear lens group lens sleeve 20 can be inserted into the outer sleeve 30 to form a damped connection with the outer sleeve 30. The moving groove 21 may also be a section of the groove provided on the rear lens group barrel sleeve 20, which is directly an annular or partial annular groove disposed on the rear lens group barrel sleeve 20 in the circumferential direction. The outer diameter of the groove portion is smaller than the outer diameter of the other portions of the lens group sleeve 20 of the rear lens group. 2 is a combined structural view of an embodiment of a projection lens focusing device of the present invention; as shown in FIG. 2, when the front lens group lens barrel 10, the rear lens group lens barrel 20, and the outer sleeve 30 are combined First, the rear section 10b of the front lens group lens sleeve 10 is inserted into the front section 20a of the rear lens group lens barrel sleeve 20, and the adjustment slider 40 is placed in the movement groove 21 to be disposed on the rear lens. The moving groove 21 on the rear section 20b of the group lens barrel 20 is closely attached and movable in the circumferential direction of the moving groove 21; the outer sleeve 30 is then fitted to the outside of the rear lens group lens barrel cover 20. After the combination, the positions of the first limiting post hole 23 and the second limiting post hole 33 are coincident or partially coincident, and the positions of the first guiding post hole 22 and the second guiding post hole 32 are coincident or partially coincident. After the combination is connected, the limiting post 60 is fixedly connected to the front lens group lens barrel 10 through the first limiting post hole 23 and the second limiting post hole 33; the guiding post 70 passes through the first guiding post hole 22 and the second guide post hole 32 are fixedly coupled to the rear lens group lens barrel 20; the oblique annular groove 31 on the outer sleeve 30 corresponds to the position of the moving groove 21, and the adjustment lever 50 passes through the outer casing The oblique annular groove 31 on the barrel 30 is fixedly coupled to the adjustment slider 40. When focusing the projection lens focusing device, the adjustment lever 50 is manually moved, so that the adjustment lever 50 drives the adjustment slider 40 to move along the oblique annular groove 31 of the outer sleeve 30, and the motion can be decomposed into The movement in the circumferential direction of the moving groove 21 of the lens group 20 of the rear lens group and the linear motion of the front and rear directions in the optical axis direction of the projection lens. Due to the action of the limiting post 60 and the guiding post 70, the reciprocating motion of the adjusting slider 40 in the oblique annular groove 31 can drive the rear lens group lens barrel 20 to linearly move forward and backward in the axial direction in the outer sleeve 30. At the same time, since the adjusting slider 40 is moved in the circumferential direction along the oblique annular groove 31 of the outer sleeve 30, the displacement length can be relatively increased, and the fine adjustment of the linear motion direction before and after is realized. The rear lens group lens barrel 20 is attached to the rear lens group during the linear motion of the front lens group lens barrel 10 in the optical axis direction (ie, the direction toward the front lens group lens barrel 10). After the limiting post 60 on the sleeve 20 contacts the second limiting surface S2 on the outer sleeve 30, the front lens group lens 10 moves forward, and the rear lens group lens barrel 20 continues to move forward, thereby changing The spacing between the front and rear lens groups in the lens barrel achieves the purpose of focusing; in the process of the linear movement of the rear lens group lens barrel 20 in the optical axis direction at the same time as the front lens group lens barrel 10, the outer sleeve 30 After the front end contacts the first limiting surface S1 on the front lens group lens barrel 10, the front lens group lens barrel 10 stops moving backward, and the rear lens group lens barrel 20 continues to move backward, thereby changing the front and rear lenses in the lens barrel. The spacing between the groups is achieved for the purpose of focusing. Since the front lens group lens barrel 10 and the rear lens group lens barrel 20 are damped by using damping oil, the front lens group lens barrel 10 and the rear lens group lens barrel are not in contact with any limiting surface in the axial direction. 20 Keep the relative position unchanged and move together. In this embodiment, the adjusting slider 40 is a semicircular orphaned structure, and the moving groove 21 is a semi-annular groove or an annular groove; the adjusting slider 40 can be disposed on the rear section 20b of the rear lens group lens barrel 20 The adjusting slot 20 is closely fitted, and the adjusting slider 40 can be inserted into the moving slot 21 by means of embedding or the like so as to be movable in the moving direction of the moving slot 21 in the moving slot 21; the adjusting lever 50 and the adjusting slider 40 are Threaded link. In this embodiment, the fixed connection includes a pasting, a splicing or a connector connection. It should be noted that the limiting post hole and the guiding post hole on the rear lens group lens barrel 20 and/or the outer sleeve 30 are not limited to the embodiment, and the limiting column hole and the guiding column can be adjusted as needed. The position and number of holes. In this embodiment, the first limiting surface S1 for limiting the axial movement of the lens group of the front lens group and the second limiting surface S2 for limiting the axial movement of the lens barrel of the rear lens group are not limited to use in the embodiment. In a specific manner, the limitation of the axial movement of the front lens group lens barrel and the rear lens group lens barrel can also be achieved by other similar limiting surfaces. For example, a limiting hole may be disposed on the lens barrel of the front lens group, and the first limiting surface is disposed near the lens barrel of the rear lens group; or in front of the lens barrel of the rear lens group The second limiting surface S2 is disposed on the connecting surface of the segment and the rear segment; and so on, as long as the set limiting surface can be used to limit the axial movement of the front lens group lens barrel and the rear lens group lens barrel within a certain range. Just fine. In summary, the focusing mode of the projection module of the projection module has a simple structure, and the focus adjustment, especially the fine adjustment, is convenient and fast, and the relative position of the front focus lens group and the rear foot lens group can be changed, and the resolution of different positions is more. Good, good stability, can quickly and accurately adjust the focal length to achieve the desired projection effect.
前述对本发明的具体示例性实施方案的描述是为了说明和例证的目 的。 这些描述并非想将本发明限定为所公开的精确形式， 并且很显然， 根 据上述教导， 可以进行很多改变和变化。 对示例性实施例进行选择和描述 的目的在于解释本发明的特定原理及其实际应用， 从而使得本领域的技术 人员能够实现并利用本发明的各种不同的示例性实施方案以及各种不同的 选择和改变。 本发明的范围意在由权利要求书及其等同形式所限定。  The foregoing description of the specific exemplary embodiments of the present invention is intended to These descriptions are not intended to limit the invention to the precise forms disclosed. The embodiments were chosen and described in order to explain the particular embodiments of the invention Choose and change. The scope of the invention is intended to be defined by the claims and their equivalents.

Claims

权 利 要 求 书 Claim
1 .一种投影镜头调焦装置， 其特征在于， 包括： 前镜片组镜筒、 后镜 片组镜筒、 带有法兰的外套筒、 调节滑块、 调节拨杆、 限位柱以及导向柱； 所述前镜片组镜筒上设置有用于限制前镜片组镜筒轴向运动的第一限位 面； 所述后镜片组镜筒上设置有移动槽、 第一限位柱孔、 第一导向柱孔； 所述外套筒上设置有斜向环形槽、 第二限位柱孔、 第二导向柱孔以及用于 限制后镜片组镜筒轴向运动的第二限位面； 所述限位柱穿过第一限位柱孔和第二限位柱孔与前镜片组镜筒固定连 接， 所述导向柱穿过第一导位柱孔和第二导向柱孔与后镜片组镜筒固定连 接； 所述调节滑块置入移动槽并可沿移动槽的圆周方向移动， 调节拨杆穿 过所述外套筒上的斜向环形槽与调节滑块固定连接。  What is claimed is: 1 . A projection lens focusing device, comprising: a front lens group lens barrel, a rear lens group lens barrel, an outer sleeve with a flange, an adjustment slider, an adjustment lever, a limiting column, and a guiding a first limiting surface for limiting the axial movement of the lens barrel of the front lens group is disposed on the lens barrel of the front lens group; the moving lens groove, the first limiting column hole, and the a guiding column hole; the outer sleeve is provided with an oblique annular groove, a second limiting column hole, a second guiding column hole and a second limiting surface for limiting axial movement of the lens group of the rear lens group; The limiting column is fixedly connected to the front lens group barrel through the first limiting column hole and the second limiting column hole, and the guiding column passes through the first guiding post hole and the second guiding post hole and the rear lens group The lens barrel is fixedly connected; the adjusting slider is inserted into the moving groove and is movable in the circumferential direction of the moving groove, and the adjusting lever is fixedly connected to the adjusting slider through the oblique annular groove on the outer sleeve.
2. 根据权利要求 1所述的投影镜头调焦装置， 其特征在于， 所述前镜 片组镜筒套分为前段（1 0a)和后段（1 Ob)， 前段（1 0a)和后段（1 Ob)均为圆形 管状结构； 所述前段（1 0a)的外径大于后段（1 0b)的外径； 所述第一限位面 设置在前段（1 0a)和后段（1 0b)的连接面上。 2. The projection lens focusing device according to claim 1, wherein the front lens group barrel is divided into a front section (10a) and a rear section (1 Ob), a front section (10a) and a rear section. (1 Ob) is a circular tubular structure; the outer diameter of the front section (10a) is larger than the outer diameter of the rear section (10b); the first limiting surface is disposed in the front section (10a) and the rear section ( 1 0b) on the connection surface.
3. 根据权利要求 2所述的投影镜头调焦装置， 其特征在于， 所述前镜 片组镜筒套的前段（1 0a)和后段（1 0b)一体成型。 The projection lens focusing device according to claim 2, wherein the front stage (10a) and the rear stage (10b) of the front lens group lens barrel are integrally formed.
4. 根据权利要求 2所述的投影镜头调焦装置， 其特征在于， 所述前镜 片组镜筒后段（1 0b)的外径稍小于后镜片组镜筒与前镜片组镜筒连接部分 的内径， 前镜片组镜筒的后段（1 0b)套入后镜片组镜筒的内部， 前镜片组镜 筒的后段（1 0b)与后镜片组镜筒为阻尼连接。 4. The projection lens focusing device according to claim 2, wherein an outer diameter of the rear lens barrel (10b) of the front lens group is slightly smaller than a connection portion between the rear lens group lens barrel and the front lens group lens barrel. The inner diameter, the rear section of the lens barrel of the front lens group (10b) is nested inside the lens barrel of the rear lens group, and the rear section (10b) of the lens barrel of the front lens group is dampedly connected with the lens barrel of the rear lens group.
5. 根据权利要求 1 所述的投影镜头调焦装置， 其特征在于， 所述第二 限位面设置在第二限位柱孔上靠近前镜片组镜筒的端面上。 The projection lens focusing device according to claim 1, wherein the second limiting surface is disposed on the second limiting post hole adjacent to an end surface of the front lens group lens barrel.
6. 根据权利要求 1 所述的投影镜头调焦装置， 其特征在于， 所述后镜 片组镜筒套分为前段（20a)和后段（20b)，所述后段（20b)设置一突起环面， 前段（20a)和突起环面之间为移动槽； 前段（20a)的外径大于或等于突起环 面 S3的外径， 突起环面 S3的外径大于后段（20b)其他部分的外径。 6. The projection lens focusing device according to claim 1, wherein the rear mirror The chip group sleeve is divided into a front section (20a) and a rear section (20b), the rear section (20b) is provided with a protruding torus surface, and a moving groove is formed between the front section (20a) and the protruding torus; the front section (20a) The outer diameter is greater than or equal to the outer diameter of the projection annulus S3, and the outer diameter of the projection annulus S3 is larger than the outer diameter of the other portion of the rear section (20b).
7. 根据权利要求 6所述的投影镜头调焦装置， 其特征在于， 所述后镜 片组镜筒套的前段（20a)和后段（20b)—体成型。 The projection lens focusing device according to claim 6, wherein the front section (20a) and the rear section (20b) of the rear lens group lens barrel are integrally formed.
8. 根据权利要求 1所述的投影镜头调焦装置， 其特征在于， 所述调节 滑块为半圆孤形结构， 可与设置在后镜片组镜筒上的移动槽紧密贴合。 8. The projection lens focusing device according to claim 1, wherein the adjustment slider has a semicircular orphan structure and can closely fit with a movement groove provided on the lens group of the rear lens group.
9. 根据权利要求 1所述的投影镜头调焦装置， 其特征在于， 所述移动 槽为半环形槽或者环形槽。 9. The projection lens focusing device according to claim 1, wherein the moving groove is a semi-annular groove or an annular groove.
1 0.根据权利要求 1所述的投影镜头调焦装置， 其特征在于， 所述调节 拨杆与调节滑块为螺紋链接。 The projection lens focusing device according to claim 1, wherein the adjustment lever and the adjustment slider are threaded links.
PCT/CN2016/093427 2016-07-15 2016-08-05 Focusing device for projection lens WO2018010235A1 (en)

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