WO2022126868A1 - 一种镜头调焦组件和投影机 - Google Patents

一种镜头调焦组件和投影机 Download PDF

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Publication number
WO2022126868A1
WO2022126868A1 PCT/CN2021/079766 CN2021079766W WO2022126868A1 WO 2022126868 A1 WO2022126868 A1 WO 2022126868A1 CN 2021079766 W CN2021079766 W CN 2021079766W WO 2022126868 A1 WO2022126868 A1 WO 2022126868A1
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WIPO (PCT)
Prior art keywords
lens
groove
focusing
focusing ring
assembly
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PCT/CN2021/079766
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English (en)
French (fr)
Inventor
梅良
丁明内
朱炜湛
杨伟樑
高志强
Original Assignee
广景视睿科技（深圳）有限公司
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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
Priority to US17/543,772 priority Critical patent/US20220187693A1/en
Publication of WO2022126868A1 publication Critical patent/WO2022126868A1/zh

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    • 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
    • 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
    • G03B21/142—Adjusting of projection optics

Definitions

  • the present application relates to the technical field of projectors, and in particular, to a lens focusing assembly and a projector.
  • a projector also known as a projector, is a device that can project images or videos onto a screen. It can be connected to a computer, DV, etc. through different interfaces to play corresponding video signals.
  • Projectors are widely used in homes, offices, schools and entertainment venues. With the vigorous development of the projection industry, projectors have penetrated into the daily life of the general public, and all kinds of projectors can be seen everywhere around us. With the rapid development of the industry, the technology of projection has also been continuously innovated, and various new applications have emerged as the times require.
  • Micro projector is a new type of projection product developed in recent years that uses LED or laser as light source and LCOS or DMD as display chip. It has low power consumption, small size and low price, and the market scale is growing day by day. Due to the different usage scenarios, the distance between the projection device and the wall or curtain on which the projected image is projected is also different. In order to make the projected image clearer, the focal length of the lens should generally be adjusted accordingly. Therefore, most projection devices have corresponding focusing devices or focusing structures for adjusting the focal length of the lens.
  • the focusing module is divided into two parts: a fixed module and a moving module (the moving module can be a single lens or a combination of multiple optical elements). The lens of the fixed module is not allowed to move or rotate, so the focal length is adjusted by the movement of the moving module along the optical axis.
  • the size of the optomechanical is often very compact, making it impossible to accommodate more mechanical components for lens focusing design.
  • one or a group of lenses or the entire lens needs to be moved to compensate for optical system tolerances. This brings difficulties to the design of lenses, especially in the design of micro-optical machines.
  • a lens focusing assembly which includes: a lens barrel, the lens barrel includes a barrel body and a limit structure, and the barrel body A receiving space is defined, and a through groove is set on the cylinder body; a focusing ring is sleeved on the cylinder body and can rotate around the cylinder body, and a groove is set on the focusing ring, The groove is arranged along a section of helical line; the limiting structure prevents the focusing ring from moving along the axis of the barrel; the moving assembly includes a support piece and a matching piece, and the support piece is used for The lens is fixed and located in the accommodating space, and the fitting member extends from the support member through the through groove and is matched with the groove.
  • the groove cooperates with the matching piece and drives the matching piece to move forward and backward along the through groove, and the matching piece simultaneously drives
  • the lens barrel further includes a lens barrel fixing portion, the lens barrel fixing portion is used to install and fix the lens barrel, and the barrel body is connected to an end face of the lens barrel fixing portion;
  • the position-limiting structure includes an end face of the lens barrel fixing portion and a block provided on the barrel, and the focusing ring is located between the end face of the lens barrel fixing portion and the block of the barrel.
  • the cylindrical body is cylindrical, and the through grooves are parallel to the axis of the cylindrical body; and/or, the number of the through grooves is two, and the two through grooves are opened in the and/or, the part of the cylindrical body provided with the through groove is an inwardly protruding part, so that only the inwardly protruding part is slidably matched with the supporting member.
  • the inner hole surface of the focusing ring includes a first portion that is rotatably engaged with the barrel and a concave portion that is recessed radially outward from the first portion, and the concave portion can be used for positioning The stopper of the limiting structure on the cylinder body passes through.
  • the focusing ring includes a handle portion; and/or, the groove of the focusing ring penetrates a side wall of the focusing ring; and/or, the groove of the focusing ring The number is two, and the two grooves are provided on both sides of the focusing ring.
  • the support member is annular, and the fitting member is a cylinder.
  • the number of the fittings is two, and the two fittings are arranged on both sides of the support.
  • At least one lens is fixed in the support; and/or, the focus ring and the barrel are in clearance fit, the support and the barrel are in clearance fit, the The fitting piece is in clearance fit with the groove.
  • the present application also adopts the following technical solutions to solve the technical problem: a projector, which includes the lens focusing assembly according to any one of the above.
  • the projector is a portable projector.
  • the beneficial effects of the present application are: different from the prior art, the lens focusing assembly in the embodiment of the present application can be achieved by the cooperation of the lens barrel, the focusing ring and the moving assembly.
  • the adjustment of the position of the lens is realized, so the lens focusing assembly has a simple structure, is easy to operate to realize the adjustment of the focal length, and occupies a relatively small space. Therefore, the lens focusing assembly of the present application is suitable for projectors, especially for portable projectors.
  • FIG. 1 is a schematic perspective view of a lens focusing assembly in an embodiment of the present application
  • Fig. 2 is the exploded schematic diagram of the lens focusing assembly of Fig. 1;
  • FIG. 3 is a schematic cross-sectional view of the focusing assembly of the lens of FIG. 1 .
  • 100-lens focusing assembly 10-lens barrel, 11-cylinder, 12-limiting structure, 13-accommodating space, 14-through groove, 15-lens barrel fixing part, 16-end face, 17 -stop, 18-inward protrusion, 20-focusing ring, 21-groove, 22-bore surface, 23-first part, 24-concave part, 25-handle part, 26-inner space, 30-movement assembly, 31-support, 32-fit, 40-lens.
  • the lens focusing assembly 100 may mainly include a lens barrel 10 , a focusing ring 20 and a moving assembly 30 . Both the focusing ring 20 and the moving assembly 30 are mounted on the lens barrel 10 , and the focusing ring 20 is used to cause the moving assembly 30 to be relative to the lens barrel by rotating on the lens barrel 10 10 moves back and forth, so as to realize the position adjustment of the lens in the movement assembly 30 .
  • the lens barrel 10 may include a barrel body 11 and a limiting structure 12 , the barrel body 11 defines a receiving space 13 , and a through groove 14 is defined on the barrel body 11 .
  • the lens barrel 10 is used for accommodating the lens and providing a passage for light to pass through.
  • the cylindrical body 11 has a cylindrical shape, for example, a cylindrical shape.
  • the cylindrical body 11 defines a receiving space 13 by a cylindrical side wall.
  • the through groove 14 may penetrate through the cylindrical side wall of the cylindrical body 11 in the thickness direction, and may penetrate through one end of the cylindrical body 11 in the length direction, eg, toward the light-emitting direction.
  • the focusing ring 20 is sleeved on the cylindrical body 11 and can rotate around the cylindrical body 11 .
  • a groove 21 is defined on the focusing ring 20 , and the groove 21 can be generally arranged along a section of a spiral line.
  • the limiting structure 12 can prevent the focusing ring 20 from moving along the axis of the barrel 11 .
  • the focusing ring 20 is an annular body, which encloses an inner space 26 , and the inner space 26 is used for inserting the cylindrical body 11 therein.
  • the groove 21 is formed on the side wall of the focusing ring 20 , which can be a through groove running through the side wall of the focusing ring 20 , or can be concave radially outward from the inner side of the side wall of the focusing ring 20 . into the slot.
  • the grooves 21 are inclined grooves, which are similar to that of a thread.
  • the groove 21 may start from a portion close to the first end face of the focus ring 20 and then extend both circumferentially and axially so as to end at a portion close to the second end face of the focus ring 20 .
  • the two ends of the groove 21 may have stop parts, so that the fitting part 32 of the moving component 30 can only move between the two ends of the groove 21 without moving out of the groove 21 .
  • the moving assembly 30 may include a support member 31 and a fitting member 32 .
  • the support member 31 is used for fixing the lens 40
  • the fitting member 32 extends outward from the support member 31 in a substantially radial direction. After assembly, the supporting member 31 and the lens 40 thereon are located in the receiving space 13 of the cylindrical body 11 , and the fitting member 32 passes through the through groove 14 and fits with the groove 21 .
  • the moving assembly 30 may also be referred to as a moving spacer.
  • the focusing ring 20 can be rotated around the cylinder 11 , then the groove 21 is matched with the matching piece 32 and drives the matching piece 32 along the through groove 14
  • the matching member 32 drives the supporting member 31 to move along the axis of the cylinder 11 in the receiving space 13 at the same time. It is easy to understand that when the focus ring 20 rotates, since it cannot move axially, the cam surface of the groove 21 will drive the fitting member 32 to move axially, so that the fitting member 32 can simultaneously drive the supporting member 31 and the lens 40 to move along the axis.
  • the axis of the cylindrical body 11 moves.
  • the adjustment of the position of the lens 40 can be realized by the cooperation of the lens barrel 10 , the focusing ring 20 and the moving assembly 30 . Therefore, the structure of the lens focusing assembly 100 Simple and easy to operate to realize the debugging of focal length, and the space occupied is relatively small. Therefore, the lens focusing assembly 100 of the present application is suitable for projectors, especially for portable projectors, or micro projectors.
  • the lens barrel 10 may further include a lens barrel fixing portion 15, and the lens barrel fixing portion 15 is used to install and fix the lens barrel 10, and the barrel body 11 is connected to the lens barrel The end face 16 of the fixed portion 15 .
  • the lens barrel fixing portion 15 may include a flat structure or a convex structure, so as to facilitate cooperation with other components in the projector, realize the installation and fixation of the lens barrel 10, and prevent the lens barrel 10 from moving.
  • the limiting structure 12 may include an end surface 16 of the lens barrel fixing portion 15 and a stopper 17 provided on the barrel 11 , and the focusing ring 20 is located on the end surface 16 and the end surface 16 of the lens barrel fixing portion 15 . between the blocks 17 of the cylinder body 11 .
  • the lens barrel fixing portion 15 and the barrel body 11 may be integrally formed components, or may be separately formed and then connected.
  • the distance between the end surface 16 of the lens barrel fixing portion 15 and the stopper 17 of the barrel body 11 can be equal to the thickness of the focus ring 20 in the axial direction, so that the focus ring 20 can be blocked from moving back and forth, while Only the focus ring 20 is allowed to rotate around the barrel 11 .
  • the barrel 11 may be cylindrical, and the through groove 14 may be parallel to the axis of the barrel 11 ; the cylindrical barrel 11 is used to provide a cylindrical outer surface so as to be compatible with the adjustment
  • the cylindrical inner surface portion of the focus ring 20 is rotatably fitted.
  • the through grooves 14 are arranged parallel to the axis of the cylindrical body 11 to form a straight channel, which is convenient for guiding the fitting piece 32 to move in a straight line.
  • the number of the through grooves 14 can be two, and the two through grooves 14 can be opened on both sides of the cylindrical body 11 ; for example, the two through grooves 14 can be along the diameter direction of the cylindrical body 11 . Arrangement, which can make the fitting 32 evenly force and move smoothly.
  • the portion of the cylindrical body 11 provided with the through groove 14 may be an inwardly protruding portion 18 , so that only the inwardly protruding portion 18 is slidably engaged with the support member 31 .
  • the inner surface of the inwardly protruding portion 18 may be located within a cylindrical surface of a smaller diameter, and the other inner surface of the barrel 11 may be located within a cylindrical surface of a larger diameter, so that only the inwardly directed
  • the inner surface of the inner protrusion 18 is slidingly fitted with the cylindrical outer surface of the support member 31 , which can reduce the frictional force between the support member 31 and the cylinder 11 , making it easier to adjust.
  • the inner hole surface 22 of the focusing ring 20 includes a first portion 23 rotatably matched with the barrel 11 and a concave portion 24 recessed radially outward from the first portion 23 .
  • the concave portion 24 can allow the stopper 17 of the limiting structure 12 located on the cylindrical body 11 to pass through.
  • the focus ring 20 may include a handle portion 25 , and the handle portion 25 can be held by the user's fingers to rotate the focus ring 20 .
  • the groove 21 of the focusing ring 20 can penetrate through the side wall of the focusing ring 20, which can facilitate the assembly of the moving assembly 30; for example, the supporting member 31 and the matching member 32 of the moving assembly 30 can be separated When assembling, first insert the support 31 into the cylinder body 11 , then insert the fitting 32 through the groove 21 and the through groove 14 in sequence, and then connect to the support 31 .
  • the number of the grooves 21 of the focusing ring 20 is two, and the two grooves 21 are provided on both sides of the focusing ring 20;
  • the focusing ring 20 is evenly distributed, which can make the fitting member 32 receive a balanced force and move smoothly.
  • the support member 31 is annular, and the fitting member 32 is a cylinder.
  • the annular support 31 may provide a cylindrical outer surface for sliding engagement with the inward projection 18 of the barrel 11 .
  • the fitting 32 is a cylinder, which can reduce the friction with the side walls of the through groove 14 and the groove 21, so that the adjustment is easy.
  • the number of the fittings 32 is two, and the two fittings 32 are disposed on both sides of the support 31 .
  • the two matching pieces 32 can be symmetrically distributed on the support piece 31 , which can make the matching pieces 32 receive a balanced force and move smoothly.
  • At least one lens 40 is fixed in the support 31 ; for example, one or a group or a group of lenses may be arranged in the support 31 ; these lenses 40 may be integral with the support 31 .
  • a clearance fit refers to a fit with a clearance, including the case where the minimum clearance is equal to zero.
  • the present invention also provides a projector.
  • the projector may include the lens focusing assembly 100 according to any of the above.
  • the projector can be any projector that requires a focus movement of the lens; in particular, the projector can be a portable projector. Since the lens focusing assembly 100 provided by the present application has the advantages of simple structure, convenient debugging, small temporary space, etc., it is extremely suitable for portable projectors, that is, micro projectors.

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  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
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Abstract

一种镜头调焦组件（100）和投影机。镜头调焦组件（100）包括：镜筒（10），具有筒体（11）和限位结构（12），筒体（10）限定收容空间（13），且筒体（11）上开设通槽（14）；调焦环（20），套在筒体（11）上，能够绕筒体（11）转动，调焦环（20）上开设凹槽（21），凹槽（21）沿一段螺旋线设置；限位结构（12）阻止调焦环（20）沿筒体（11）的轴线移动；运动组件（30），包括支撑件（31）和配合件（32），支撑件（31）用于固定镜片（40）且位于收容空间（13）内，配合件（32）自支撑件（31）延伸穿过通槽（14）并与凹槽（21）配合。调焦环（20）绕筒体（11）转动时，凹槽（21）与配合件（32）配合并且驱动配合件（32）沿通槽（14）前后移动，配合件（32）同时带动支撑件（31）在收容空间（13）内沿筒体（11）的轴线移动。镜头调焦组件（100）通过镜筒（10）、调焦环（20）和运动组件（30）的配合即可实现对镜片（40）位置的调节，因此结构简单，容易操作，占用的空间也比较小。

Description

一种镜头调焦组件和投影机
相关申请的交叉参考
本申请要求于2020年12月26日提交中国专利局，申请号为202011487348.X，发明名称为“一种镜头调焦组件和投影机”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及投影机技术领域，具体而言，涉及一种镜头调焦组件和投影机。
背景技术
投影机又称投影仪，是一种可以将图像或视频投射到幕布上的设备，其可以通过不同的接口同计算机、DV等相连接播放相应的视频信号。
投影机广泛应用于家庭、办公室、学校和娱乐场所。随着投影产业的蓬勃发展，投影机已经深入到普通大众的日常生活当中，在我们的身边，随处可见各式各样的投影机。在产业迅猛发展的同时，投影的技术也得到了不断的革新，各式各样的新应用也应运而生。
微型投影机是近年发展起来一种采用LED或激光作为光源、采用LCOS或DMD作为显示芯片的新型投影产品，功耗低、尺寸小、价格便宜，市场规模日益壮大。由于使用场景的不同，投影设备与其所投影图像所投射的墙面或幕布间的距离也有所不同，为了使投射出来的画面更为清晰，一般要对镜头的焦距进行相应的调节。因此，大部分投影设备中均有相应的调焦装置或调焦结构，用于镜头焦距的调节。通常，调焦模块都分为两个部分：固定模组和移动模组(移动模组可以是单个镜片，也可以是多个光学元件组合而成)。固定模组的镜片不允许移动或转动，所以焦距是通过移动模组沿光轴方向的移动而达到调节的目的。
在微型投影机中，由于结构尺寸的限制，因此光机的尺寸往往都非常紧凑，使得无法容纳更多的机构件来做镜头的调焦设计。然而，在绝 大多数情况下，都需要对镜头的一个或者一组镜片或整个镜头来进行移动，以此来补偿光学系统的公差。这就给镜头的设计带来的困难，在微型光机的设计中尤其如此。
发明内容
基于此，有必要针对上述技术问题，提供一种镜头调焦组件，使得通过简单的结构实现镜头调焦。
为解决上述技术问题，本申请实施方式采用的一个技术方案是：一方面，提供一种镜头调焦组件，其包括：镜筒，所述镜筒包括筒体和限位结构，所述筒体限定收容空间，并且所述筒体上开设通槽；调焦环，所述调焦环套在所述筒体上，并且能够绕所述筒体转动，所述调焦环上开设凹槽，所述凹槽沿一段螺旋线设置；所述限位结构阻止所述调焦环沿所述筒体的轴线移动；运动组件，所述运动组件包括支撑件和配合件，所述支撑件用于固定镜片并且位于所述收容空间内，所述配合件自所述支撑件延伸穿过所述通槽并与所述凹槽配合。所述调焦环绕所述筒体转动时，所述凹槽与所述配合件配合并且驱动所述配合件沿所述通槽前后移动，所述配合件同时带动所述支撑件在所述收容空间内沿所述筒体的轴线移动。
在一些实施例中，所述镜筒还包括镜筒固定部，所述镜筒固定部用于对所述镜筒进行安装固定，所述筒体连接在所述镜筒固定部的端面；所述限位结构包括所述镜筒固定部的端面和设置在所述筒体上的挡块，所述调焦环位于所述镜筒固定部的端面和所述筒体的挡块之间。
在一些实施例中，所述筒体为圆柱形，所述通槽平行于所述筒体的轴线；和/或，所述通槽的数量为两个，两个所述通槽开设在所述筒体的两侧；和/或，所述筒体设有通槽的部分为向内凸起部，使得仅所述向内凸起部与所述支撑件滑动配合。
在一些实施例中，所述调焦环的内孔面包括与所述筒体旋转配合的第一部分和自所述第一部分径向向外凹陷的凹入部分，所述凹入部分能够供位于所述筒体上的限位结构的挡块通过。
在一些实施例中，所述调焦环包括手柄部；和/或，所述调焦环的凹槽贯穿所述调焦环的侧壁；和/或，所述调焦环的凹槽的数量为两个，两个所述凹槽开设在所述调焦环的两侧。
在一些实施例中，所述支撑件为圆环形，所述配合件为圆柱体。
在一些实施例中，所述配合件的数量为两个，两个所述配合件设置在所述支撑件的两侧。
在一些实施例中，所述支撑件中固定有至少一个镜片；和/或，所述调焦环与所述筒体为间隙配合，所述支撑件与所述筒体为间隙配合，所述配合件与所述凹槽为间隙配合。
本申请解决其技术问题还采用以下技术方案：一种投影机，其包括根据任一以上所述的镜头调焦组件。
在一些实施例中，所述投影机为便携式投影机。
与现有技术相比，本申请的有益效果是：区别于现有技术的情况，本申请实施例中的镜头调焦组件通过镜筒、调焦环和运动组件这几个部件的配合即可实现对镜片位置的调节，因此镜头调焦组件的结构简单，容易操作实现焦距的调试，占用的空间也比较小。从而，本申请的镜头调焦组件适用于投影机，尤其是适用于便携式投影机。
附图说明
一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件表示为类似的元件，除非有特别申明，附图中的图不构成比例限制。
图1是本申请一个实施例中镜头调焦组件的立体示意图；
图2是图1镜头调焦组件的分解示意图；
图3是图1镜头调焦组件的截面示意图。
附图标号说明：100-镜头调焦组件、10-镜筒、11-筒体、12-限位结构、13-收容空间、14-通槽、15-镜筒固定部、16-端面、17-挡块、18-向内凸起部、20-调焦环、21-凹槽、22-内孔面、23-第一部分、24- 凹入部分、25-手柄部、26-内部空间、30-运动组件、31-支撑件、32-配合件、40-镜片。
具体实施方式
为了便于理解本申请，下面结合附图和具体实施例，对本申请进行更详细的说明。需要说明的是，当元件被表述“固定于”/“安装于”另一个元件，它可以直接在另一个元件上、或者其间可以存在一个或多个居中的元件。当一个元件被表述“连接”另一个元件，它可以是直接连接到另一个元件、或者其间可以存在一个或多个居中的元件。本说明书所使用的术语“上”、“下”、“内”、“外”、“垂直的”、“水平的”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性。
除非另有定义，本说明书所使用的所有的技术和科学术语与属于本申请的技术领域的技术人员通常理解的含义相同。在本申请的说明书中所使用的术语只是为了描述具体的实施例的目的，不是用于限制本申请。本说明书所使用的术语“和/或”包括一个或多个相关的所列项目的任意的和所有的组合。
此外，下面所描述的本申请不同实施例中所涉及的技术特征只要彼此之间未构成冲突就可以相互结合。
本申请实施例提供了一种镜头调焦组件，请参阅图1至图3所示，所述镜头调焦组件100主要可包括镜筒10、调焦环20和运动组件30。所述调焦环20和运动组件30均安装在所述镜筒10上，所述调焦环20用于通过在所述镜筒10上而旋转促使所述运动组件30相对于所述镜筒10前后移动，从而实现运动组件30中镜片的位置调节。
其中，如图2所示，所述镜筒10可包括筒体11和限位结构12，所述筒体11限定收容空间13，并且所述筒体11上开设通槽14。所述镜 筒10用于容纳镜片，并且提供光线通过的通道。所述筒体11呈筒状，例如可为圆筒形。所述筒体11通过筒状侧壁限定收容空间13。通槽14可在厚度方向上贯穿筒体11的筒状侧壁，并且可在长度方向上贯穿所述筒体11的例如朝着出光方向的一端。
结合图2和图3所示，所述调焦环20套在所述筒体11上，并且能够绕所述筒体11转动。所述调焦环20上开设凹槽21，所述凹槽21可大致沿一段螺旋线设置。当所述调焦环20套在所述筒体11上后，可通过所述限位结构12阻止所述调焦环20沿所述筒体11的轴线移动。所述调焦环20为环状体，其围成一内部空间26，所述内部空间26用于供所述筒体11插设其内。所述凹槽21开设在所述调焦环20的侧壁上，其可为贯穿调焦环20的侧壁的通槽，亦可为自调焦环20的侧壁内侧径向向外凹入的槽。所述凹槽21为倾斜走向的槽，其走向与一段螺纹的走向类似。例如，所述凹槽21可始自靠近所述调焦环20第一端面的部分，然后沿周向和轴向同时延伸，使得终止于靠近所述调焦环20第二端面的部分。所述凹槽21的两端可具有止挡部，使得运动组件30的配合件32仅可在凹槽21的两端之间配合移动，而不会移出凹槽21。
所述运动组件30可包括支撑件31和配合件32。所述支撑件31用于固定镜片40，所述配合件32自所述支撑件31大致沿径向向外延伸。组装后，所述支撑件31和其上的镜片40位于所述筒体11的收容空间13内，所述配合件32穿过所述通槽14并与所述凹槽21配合。所述运动组件30又可称为运动隔圈。
其中，当需要调焦时，可使所述调焦环20绕所述筒体11转动，则所述凹槽21与所述配合件32配合并且驱动所述配合件32沿所述通槽14前后移动，所述配合件32同时带动所述支撑件31在所述收容空间13内沿所述筒体11的轴线移动。容易理解的是，调焦环20转动时，由于其不能轴向移动，因此凹槽21的凸轮面将驱使配合件32轴向移动，从而实现配合件32同时带动支撑件31和镜片40沿所述筒体11的轴线移动。
在上述实施例的镜头调焦组件100中，其通过镜筒10、调焦环20 和运动组件30这几个部件的配合即可实现对镜片40位置的调节，因此镜头调焦组件100的结构简单，容易操作实现焦距的调试，占用的空间也比较小。从而，本申请的镜头调焦组件100适用于投影机，尤其是适用于便携式投影机，或称微型投影机。
在一些实施例中，所述镜筒10还可包括镜筒固定部15，所述镜筒固定部15用于对所述镜筒10进行安装固定，所述筒体11连接在所述镜筒固定部15的端面16。所述镜筒固定部15可包括平面结构或凸起结构，从而便于与投影机中的其它部件配合，实现对所述镜筒10的安装和固定，防止镜筒10移动。所述限位结构12可包括所述镜筒固定部15的端面16和设置在所述筒体11上的挡块17，所述调焦环20位于所述镜筒固定部15的端面16和所述筒体11的挡块17之间。所述镜筒固定部15和所述筒体11可为一体成型的构件，或者为分体成型后再连接起来。所述镜筒固定部15的端面16和所述筒体11的挡块17之间的距离可与调焦环20在轴向方向上的厚度相当，使得能够阻挡调焦环20前后移动，而仅允许调焦环20围绕所述筒体11转动。
在一些实施例中，所述筒体11可为圆柱形，所述通槽14可平行于所述筒体11的轴线；圆柱形的筒体11用于提供圆柱形的外表面，以便与调焦环20的圆柱形内表面部分转动配合。所述通槽14平行于所述筒体11的轴线设置，从而形成直线形的通道，这便于引导配合件32做直线移动。另外，所述通槽14的数量可为两个，两个所述通槽14可开设在所述筒体11的两侧；例如，两个所述通槽14可沿筒体11的直径方向布置，这能够使配合件32受力均衡，移动平稳。另外，所述筒体11设有通槽14的部分可为向内凸起部18，使得仅所述向内凸起部18与所述支撑件31滑动配合。例如，所述向内凸起部18的内表面可位于一较小直径的圆柱面内，而所述筒体11的其它内表面可位于一较大直径的圆柱面内，从而仅所述向内凸起部18的内表面与所述支撑件31的圆柱形外表面滑动配合，这可降低支撑件31与筒体11之间的摩擦力，使得更容易调节。
在一些实施例中，所述调焦环20的内孔面22包括与所述筒体11 旋转配合的第一部分23和自所述第一部分23径向向外凹陷的凹入部分24，所述凹入部分24能够供位于所述筒体11上的限位结构12的挡块17通过。通过设置凹入部分24，可方便将调焦环20组装在镜筒10上；也就是说，在组装时，可先将所述调焦环20的凹入部分24与筒体11的挡块17轴向对齐，即可将调焦环20轴向推动而套在筒体11上；之后，只要凹入部分24与挡块17不再对齐，即可防止调焦环20从筒体11上脱落。
在一些实施例中，所述调焦环20可包括手柄部25，所述手柄部25可供使用者用手指捏持，进而转动调焦环20。另外，所述调焦环20的凹槽21可贯穿所述调焦环20的侧壁，这可方便对运动组件30的组装；例如，运动组件30的支撑件31和配合件32可为分体结构，组装时先将支撑件31插入筒体11，然后将配合件32依次插过凹槽21和通槽14，再连接到支撑件31上。另外，所述调焦环20的凹槽21的数量为两个，两个所述凹槽21开设在所述调焦环20的两侧；例如，两个所述凹槽21可在所述调焦环20上均匀分布，这能够使配合件32受力均衡，移动平稳。
在一些实施例中，所述支撑件31为圆环形，所述配合件32为圆柱体。圆环形的支撑件31可提供圆柱形外表面，从而与筒体11的向内凸起部18滑动配合。所述配合件32为圆柱体，可减少与通槽14和凹槽21的侧壁的摩擦，使得容易调节。
在一些实施例中，所述配合件32的数量为两个，两个所述配合件32设置在所述支撑件31的两侧。例如，两个所述配合件32可在所述支撑件31上对称分布，这能够使配合件32受力均衡，移动平稳。
在一些实施例中，所述支撑件31中固定有至少一个镜片40；例如，支撑件31里面可设置一个或者一组或者一群镜片；这些镜片40可与支撑件31是一体的。
另外，所述调焦环20与所述筒体11为间隙配合，所述支撑件31与所述筒体11为间隙配合，所述配合件32与所述凹槽21为间隙配合。在本申请中，间隙配合是指具有间隙的配合，其中包括最小间隙等于零 的情况。
在一些实施例中，本实用新型还提供一种投影机。所述投影机可包括根据任一以上所述的镜头调焦组件100。
所述投影机可为需要对镜头调焦移动的任何投影机；尤其是，所述投影机可为便携式投影机。由于本申请提供的镜头调焦组件100具有结构简单、调试方便、暂用空间小等优点，因此极为适用于便携式投影机，即微型投影机。
以上所述仅为本申请的实施方式，并非因此限制本申请的专利范围，凡是利用本申请说明书及附图容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本申请的专利保护范围。

Claims (10)

  1. 一种镜头调焦组件(100)，其特征在于，包括：
    镜筒(10)，所述镜筒(10)包括筒体(11)和限位结构(12)，所述筒体(11)限定收容空间(13)，并且所述筒体(11)上开设通槽(14)；
    调焦环(20)，所述调焦环(20)套在所述筒体(11)上，并且能够绕所述筒体(11)转动，所述调焦环(20)上开设凹槽(21)，所述凹槽(21)沿一段螺旋线设置；所述限位结构(12)阻止所述调焦环(20)沿所述筒体(11)的轴线移动；和
    运动组件(30)，所述运动组件(30)包括支撑件(31)和配合件(32)，所述支撑件(31)用于固定镜片(40)并且位于所述收容空间(13)内，所述配合件(32)自所述支撑件(31)延伸穿过所述通槽(14)并与所述凹槽(21)配合；
    其中，所述调焦环(20)绕所述筒体(11)转动时，所述凹槽(21)与所述配合件(32)配合并且驱动所述配合件(32)沿所述通槽(14)前后移动，所述配合件(32)同时带动所述支撑件(31)在所述收容空间(13)内沿所述筒体(11)的轴线移动。
  2. 根据权利要求1所述的镜头调焦组件(100)，其特征在于，
    所述镜筒(10)还包括镜筒固定部(15)，所述镜筒固定部(15)用于对所述镜筒(10)进行安装固定，所述筒体(11)连接在所述镜筒固定部(15)的端面(16)；
    所述限位结构(12)包括所述镜筒固定部(15)的端面(16)和设置在所述筒体(11)上的挡块(17)，所述调焦环(20)位于所述镜筒固定部(15)的端面(16)和所述筒体(11)的挡块(17)之间。
  3. 根据权利要求1所述的镜头调焦组件(100)，其特征在于，
    所述筒体(11)为圆柱形，所述通槽(14)平行于所述筒体(11)的轴线；和/或
    所述通槽(14)的数量为两个，两个所述通槽(14)开设在所述筒体(11)的两侧；和/或
    所述筒体(11)设有通槽(14)的部分为向内凸起部(18)，使得仅所述向内凸起部(18)与所述支撑件(31)滑动配合。
  4. 根据权利要求1所述的镜头调焦组件(100)，其特征在于，
    所述调焦环(20)的内孔面(22)包括与所述筒体(11)旋转配合的第一部分(23)和自所述第一部分(23)径向向外凹陷的凹入部分(24)，所述凹入部分(24)能够供位于所述筒体(11)上的限位结构(12)的挡块(17)通过。
  5. 根据权利要求1所述的镜头调焦组件(100)，其特征在于，
    所述调焦环(20)包括手柄部(25)；和/或
    所述调焦环(20)的凹槽(21)贯穿所述调焦环(20)的侧壁；和/或
    所述调焦环(20)的凹槽(21)的数量为两个，两个所述凹槽(21)开设在所述调焦环(20)的两侧。
  6. 根据权利要求1所述的镜头调焦组件(100)，其特征在于，
    所述支撑件(31)为圆环形，所述配合件(32)为圆柱体。
  7. 根据权利要求1所述的镜头调焦组件(100)，其特征在于，
    所述配合件(32)的数量为两个，两个所述配合件(32)设置在所述支撑件(31)的两侧。
  8. 根据权利要求1-7中任一项所述的镜头调焦组件(100)，其特征在于，
    所述支撑件(31)中固定有至少一个镜片(40)；和/或
    所述调焦环(20)与所述筒体(11)为间隙配合，所述支撑件(31)与所述筒体(11)为间隙配合，所述配合件(32)与所述凹槽(21)为间隙配合。
  9. 一种投影机，其特征在于，所述投影机包括根据权利要求1-8中任一项所述的镜头调焦组件(100)。
  10. 根据权利要求9所述的投影机，其特征在于，
    所述投影机为便携式投影机。
PCT/CN2021/079766 2020-12-16 2021-03-09 一种镜头调焦组件和投影机 WO2022126868A1 (zh)

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