CN219162517U

CN219162517U - Electronic viewfinder

Info

Publication number: CN219162517U
Application number: CN202223213624.0U
Authority: CN
Inventors: 吴文胜
Original assignee: Shenzhen Lizhi Zhengzhong Electronics Co ltd
Current assignee: Shenzhen Lizhi Zhengzhong Electronics Co ltd
Priority date: 2022-12-01
Filing date: 2022-12-01
Publication date: 2023-06-09
Anticipated expiration: 2032-12-01

Abstract

The utility model discloses an electronic viewfinder, which comprises a shell, a lens cone, a lens component and a focusing knob, wherein an inner cavity is formed in the shell; the lens barrel is movably arranged in the inner cavity; the lens component is fixed in the lens barrel; the focusing knob is rotatably mounted on the shell; the focusing knob is provided with an arc hole, a guide column is arranged at the position of the lens barrel corresponding to the arc hole, and the guide column is arranged in the arc hole; when the focusing knob rotates, the guide column moves along the arc-shaped hole, so that the lens barrel drives the lens component to move. According to the technical scheme, the arc-shaped holes are formed in the focusing knob, the guide posts are arranged in the lens barrel corresponding to the arc-shaped holes, and the guide posts are arranged in the arc-shaped holes, so that components of a focusing structure of the electronic viewfinder are simplified, the whole electronic viewfinder is compact in structure, simple in structure and low in production cost.

Description

Electronic viewfinder

Technical Field

The utility model relates to the technical field of cameras, in particular to an electronic viewfinder.

Background

Electronic viewfinders are camera components which are often ignored by people but are important in practice, and are applied to portable display devices, night vision devices, thermal imaging devices and the like, and are often applied to virtual view optical lenses of digital cameras, and can also be applied to newly popular head-mounted high-definition intelligent mobile cinema, and the types of cameras and even the grades of the cameras are determined by being equipped with different types of electronic viewfinders. The electronic viewfinder popular due to the popularity of the single-electric camera has its unique structure and advantages and disadvantages. With the progress of electronic technology, electronic viewfinders are becoming more common, and the performance of electronic viewfinders is also gradually improved.

In the related art, a user needs to adjust a focal length of an electronic viewfinder for viewing in order to obtain an optimal picture effect through the electronic viewfinder. The electronic viewfinder generally requires a plurality of component structures to cooperate to drive the lens to move so as to adjust the focal length, for example: the focusing hand wheel is fixedly connected with the focusing shaft, the bottom of the focusing shaft is provided with a gear meshed with the rack, the gear is fixedly connected with the lens, and the focusing hand wheel is rotated to drive the focusing shaft to rotate, so that the rack can drive the lens to move up and down to focus. However, the structure of the components and focusing not only makes the electronic viewfinder occupy large volume, but also is complex to assemble.

Disclosure of Invention

The utility model mainly aims to provide an electronic viewfinder, which aims at realizing compact and simple focusing structure, stable focusing and convenient assembly of the electronic viewfinder.

To achieve the above object, an electronic viewfinder according to the present utility model includes:

a housing having an interior cavity therein;

the lens barrel is movably arranged in the inner cavity;

a lens assembly fixed within the barrel;

a focus knob rotatably mounted to the housing;

the focusing knob is provided with an arc hole, a guide column is arranged at the position of the lens barrel corresponding to the arc hole, and the guide column is arranged in the arc hole;

when the focusing knob rotates, the guide column moves along the arc-shaped hole, so that the lens barrel drives the lens component to move.

In an embodiment, a rotating shaft is arranged on the shell, the focusing knob is provided with a rotating shaft hole connected with the rotating shaft, and the focusing knob can rotate relative to the rotating shaft.

In an embodiment, the casing is provided with a movable opening for the guide post to extend out, the guide post penetrates through the movable opening and extends into the arc-shaped hole, and the movable opening is formed along a movable path of the guide post.

In one embodiment, the front opening cover of the lens barrel is provided with a first cover body; the lens cone is provided with a first buckling part, the first cover body is provided with a first buckling part, and the first buckling part is in buckling connection with the first buckling part.

In an embodiment, the lens assembly includes a first lens, a second lens and a third lens sequentially disposed in the lens barrel from back to front, and the first lens, the second lens and the third lens are all abutted against and fixed with an inner wall of the lens barrel.

In an embodiment, the inner wall of the lens barrel comprises a first annular rib, a second annular rib, a third annular rib and a fourth annular rib which are sequentially connected and have gradually increased inner diameters, the inner ring of the fourth annular rib is provided with an annular ring, and the inner diameter of the annular ring is larger than the inner diameter of the third annular rib;

the rear side of the first lens is abutted with the first annular rib, and the peripheral side of the first lens is abutted with the second annular rib;

the rear side of the second lens is abutted with the first lens, the peripheral side of the second lens is abutted with the second annular rib, and the front side of the second lens is abutted with the annular ring;

the rear side of the third lens is abutted with the annular ring, and the front side of the third lens is abutted with the first cover body.

In an embodiment, the rear opening cover of the housing is provided with a second cover body, the housing is provided with a second buckling part, a second buckling part is arranged at a position of the second cover body corresponding to the second buckling part, and the second buckling part is in buckling connection with the second buckling part.

In an embodiment, the electronic viewfinder further includes a display screen, two opposite hooks are disposed on one side of the second cover body facing the inner cavity, the two hooks are respectively fastened and fixed on two opposite sides of the display screen, and the display screen is electrically connected with a main control board of the target object.

In an embodiment, a heat dissipation hole is formed in the second cover body at a position corresponding to the display screen.

In an embodiment, the number of the heat dissipation holes is a plurality, and the plurality of the heat dissipation holes are arranged at intervals along the length direction of the second cover body, and/or the plurality of the heat dissipation holes are arranged at intervals along the width direction of the second cover body.

The technical scheme of the utility model is that the electronic viewfinder comprises a shell, a lens cone, a lens component and a focusing knob, wherein an inner cavity is arranged in the shell; the lens barrel is movably arranged in the inner cavity; the lens component is fixed in the lens barrel; the focusing knob is rotatably mounted on the shell; the focusing knob is provided with an arc hole, a guide column is arranged at the position of the lens barrel corresponding to the arc hole, and the guide column is arranged in the arc hole; when the focusing knob rotates, the guide column moves along the arc-shaped hole, so that the lens barrel drives the lens component to move. So set up, when needs focus, the focus knob is rotatory relative shell, and the arc hole on the focus knob can lead the removal of guiding post on the lens cone, and the guiding post removes and drives the lens subassembly in the lens cone and remove, realizes adjusting the focus. Therefore, the components of the focusing structure of the electronic viewfinder are simplified, focusing can be realized only by setting the focusing knob to be directly matched with the lens barrel, so that the whole electronic viewfinder is compact in structure, simple in structure, easy to process and produce and low in production cost.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of one embodiment of an electronic viewfinder of the present utility model;

FIG. 2 is an exploded view of an electronic viewfinder according to another embodiment of the present utility model;

FIG. 3 is a schematic view of an electronic viewfinder according to an embodiment of the present utility model;

FIG. 4 is a schematic view of an electronic viewfinder according to another embodiment of the present utility model;

fig. 5 is a schematic structural diagram of an assembly of a lens barrel, a first cover, and a lens assembly according to an embodiment of the utility model;

fig. 6 is a schematic structural view of a lens barrel according to an embodiment of the utility model;

fig. 7 is a side view of a lens barrel of an embodiment of the electronic viewfinder of the present utility model;

FIG. 8 is a cross-sectional view A-A of FIG. 7;

fig. 9 is a side view of an electronic viewfinder according to an embodiment of the present utility model in which a lens barrel, a first cover, and a lens unit are assembled;

fig. 10 is a B-B cross-sectional view of fig. 9.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Outer casing	140	Movable opening
200	Lens barrel	110	First fastening part
				210	First lens	120	Second fastening part
220	Second lens	410	First buckling part
				230	Third lens	510	Second buckling part
300	Focusing knob	400	First cover body
				310	Arc-shaped hole	500	Second cover body
130	Rotating shaft	250	First ring rib
				320	Rotating shaft hole	260	Second ring rib
280	Annular ring	270	Third ring rib
				520	Heat dissipation hole	240	Guide post
600	Display screen	530	Clamping hook

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present utility model, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present utility model, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, if the meaning of "and/or" is presented throughout this document, it is intended to include three schemes in parallel, taking "a and/or B" as an example, including a scheme, or B scheme, or a scheme where a and B meet simultaneously. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present utility model.

Referring to fig. 1 to 10, the present utility model provides an electronic viewfinder.

The electronic viewfinder comprises a shell 100, a lens barrel 200, a lens component and a focusing knob 300, wherein the shell 100 is internally provided with an inner cavity; the lens barrel 200 is movably arranged in the inner cavity; the lens assembly is fixed in the lens barrel 200; the focus knob 300 is rotatably mounted to the housing 100; the focusing knob 300 is provided with an arc hole 310, a guide post 240 is arranged at a position of the lens barrel 200 corresponding to the arc hole 310, and the guide post 240 is arranged in the arc hole 310; when the focusing knob 300 rotates, the guide post 240 moves along the arc hole 310, so that the lens barrel 200 drives the lens assembly to move.

Specifically, the arc of the arcuate aperture 310 is selected based on the distance of movement of the lens assembly, so long as the lens assembly is guaranteed to have a sufficient adjustment distance. When focusing is needed, the focusing knob 300 rotates relative to the housing 100, the arc-shaped hole 310 on the focusing knob 300 can guide the movement of the guide post 240 on the lens barrel 200, and the movement of the guide post 240 drives the lens assembly in the lens barrel 200 to move, so that the focus adjustment is realized. So set up, simplify the part of the focusing structure of electronic viewfinder, only need set up the focusing knob 300 and directly cooperate with lens cone 200 alright realize focusing for electronic viewfinder complete machine compact structure, simple structure moreover, easily processing production reduces manufacturing cost.

Referring to fig. 1 to 2, in an embodiment, a rotation shaft 130 is provided on the housing 100, the focusing knob 300 is provided with a rotation shaft hole 320 connected to the rotation shaft 130, and the focusing knob 300 can rotate relative to the rotation shaft 130. The focusing knob 300 rotates around the rotation shaft 130, and the arc-shaped hole 310 on the focusing knob guides the movement of the guide post 240, so that the guide post 240 drives the lens barrel 200 and the lens assembly to move, and focusing is achieved.

Referring to fig. 1 to 2, in an embodiment, the housing 100 is provided with a movable opening 140 for extending the guide post 240, the guide post 240 extends into the arc-shaped hole 310 through the movable opening 140, and the movable opening 140 is provided along a movable path of the guide post 240. The movable opening 140 may be rectangular, cylindrical, etc. in shape. When the guide post 240 moves under the guide of the arc hole 310, the guide post 240 can move up and down in the movable opening 140 of the housing 100, so that the guide post 240 drives the lens barrel 200 and the lens assembly therein to move.

Referring to fig. 1 to 2, in an embodiment, a front opening cover of the lens barrel 200 is provided with a first cover 400; the lens barrel 200 is provided with a first fastening portion 110, the first cover 400 is provided with a first fastening portion 410, and the first fastening portion 110 is fastened to the first fastening portion 410. Through the buckle connection, the assembly is convenient to improve assembly efficiency, and simultaneously first lid 400 can carry out spacingly to the lens subassembly, guarantees lens subassembly installation stability.

Referring to fig. 1 to 2, in an embodiment, the lens assembly includes a first lens 210, a second lens 220 and a third lens 230 sequentially disposed in the lens barrel 200 from back to front, and the first lens 210, the second lens 220 and the third lens 230 are all held against and fixed with the inner wall of the lens barrel 200. Of course, in order to ensure the stability of the first lens 210, the second lens 220, and the third lens 230 in the lens barrel 200, in other embodiments, hooks may be provided to hook the first lens 210, the second lens 220, and the third lens 230, respectively. Thus, the stability of the first lens 210, the second lens 220, and the third lens 230 in the lens barrel 200 is increased, and the offset during focusing is prevented.

Referring to fig. 6 to 10, in an embodiment, the inner wall of the lens barrel 200 includes a first annular rib 250, a second annular rib 260, a third annular rib 270, and a fourth annular rib which are sequentially connected and have an inner diameter gradually increased, the fourth annular rib is internally provided with an annular ring 280, and the inner diameter of the annular ring 280 is larger than the inner diameter of the third annular rib 270; the rear side of the first lens 210 is in contact with the first annular rib 250, and the peripheral side is in contact with the second annular rib 260; the rear side of the second lens 220 is in contact with the first lens 210, the peripheral side is in contact with the second annular rib 260, and the front side is in contact with the annular ring 280; the third lens 230 has a rear side abutting against the annular ring 280 and a front side abutting against the first cover 400. During assembly, the first lens 210 is placed into the lens barrel 200, then the second lens 220 is placed, and then the annular ring 280 is placed, then the third lens 230 is placed, and then the first cover 400 covers the front opening of the lens barrel 200, so that stable assembly is ensured.

Referring to fig. 1 to 5, in an embodiment, a second cover 500 is disposed on the rear opening cover of the housing 100, the housing 100 is provided with a second fastening portion 120, a second fastening portion 510 is disposed at a position of the second cover 500 corresponding to the second fastening portion 120, and the second fastening portion 120 is fastened to the second fastening portion 510. The second cover 500 may play a role in dust prevention. The assembly efficiency between the housing 100 and the second cover 500 is improved by the snap connection.

Referring to fig. 1 to 2, in an embodiment, the electronic viewfinder further includes a display screen 600, two opposite hooks 530 are disposed on a side of the second cover 500 facing the inner cavity, the two hooks 530 are respectively fastened and fixed on two opposite sides of the display screen 600, and the display screen 600 is electrically connected to a main control board of the target object. It is understood that the target object may be a cell phone, a camera, etc. For example: the display screen 600 is connected with a main control board in the camera, the display screen 600 can display images in the camera, a user can watch the images through the third lens 230, the second lens 220 and the first lens 210 in sequence, and when focusing is performed, the distance between the third lens 230, the second lens 220 and the first lens 210 and eyes of the user are changed to realize focusing.

Referring to fig. 2 and 4, the display screen 600 heats up when used for a long time, and in order to ensure the service life of the display screen 600, in an embodiment, a heat dissipation hole 520 is formed on the second cover 500 at a position corresponding to the display screen 600. The heat dissipation holes 520 conduct external air flow, so that the air flow flows along the surface of the display screen 600 to drive heat, thereby realizing heat dissipation. In this embodiment, the shape of the heat dissipation hole 520 may be circular, rectangular, or the like.

With continued reference to fig. 2 and fig. 4, in an embodiment, the number of the heat dissipating holes 520 is plural, and the plurality of heat dissipating holes 520 are disposed at intervals along the length direction of the second cover 500, and/or the plurality of heat dissipating holes 520 are disposed at intervals along the width direction of the second cover 500. It can be appreciated that the plurality of heat dissipation holes 520 are spaced apart along the length direction of the second cover 500; alternatively, the plurality of heat dissipation holes 520 are arranged at intervals along the width direction of the second cover 500; or the heat dissipation holes 520 are arranged in a matrix on the second cover 500.

The foregoing description is only of the optional embodiments of the present utility model, and is not intended to limit the scope of the utility model, and all the equivalent structural changes made by the description of the present utility model and the accompanying drawings or the direct/indirect application in other related technical fields are included in the scope of the utility model.

Claims

1. An electronic viewfinder, comprising:

a housing having an interior cavity therein;

the lens barrel is movably arranged in the inner cavity;

a lens assembly fixed within the barrel;

a focus knob rotatably mounted to the housing;

2. The electronic viewfinder of claim 1, wherein the housing is provided with a rotational shaft, and the focus knob is provided with a rotational shaft hole coupled to the rotational shaft, the focus knob being rotatable relative to the rotational shaft.

3. The electronic viewfinder of claim 2, wherein the housing defines a movable opening through which the guide post extends, the guide post extending into the arcuate aperture, the movable opening defining a movable path along the guide post.

4. The electronic viewfinder according to claim 1, wherein a front opening cover of the lens barrel is provided with a first cover body;

the lens cone is provided with a first buckling part, the first cover body is provided with a first buckling part, and the first buckling part is in buckling connection with the first buckling part.

5. The electronic viewfinder of claim 4, wherein the lens assembly includes a first lens, a second lens, and a third lens that are disposed in the barrel in order from a direction closer to the first cover to a direction farther from the first cover, the first lens, the second lens, and the third lens each being held against an inner wall of the barrel.

6. The electronic viewfinder of claim 5, wherein the inner wall of the lens barrel comprises a first annular rib, a second annular rib, a third annular rib and a fourth annular rib which are sequentially connected and have gradually increased inner diameters, and an annular ring is arranged in the fourth annular rib, and the inner diameter of the annular ring is larger than the inner diameter of the third annular rib;

7. The electronic viewfinder of claim 1, wherein the rear opening cover of the housing is provided with a second cover body, the housing is provided with a second fastening portion, a second fastening portion is provided at a position of the second cover body corresponding to the second fastening portion, and the second fastening portion is fastened and connected with the second fastening portion.

8. The electronic viewfinder of claim 7, further comprising a display screen, wherein two opposite hooks are disposed on a side of the second cover facing the inner cavity, the two hooks are respectively fastened and fixed on two opposite sides of the display screen, and the display screen is electrically connected with a main control board of a target object.

9. The electronic viewfinder of claim 8, wherein the second cover has a heat dissipating aperture formed therein at a position corresponding to the display screen.

10. The electronic viewfinder according to claim 9, wherein the number of the heat dissipation holes is plural, the plural heat dissipation holes are arranged at intervals in a longitudinal direction of the second cover, and/or the plural heat dissipation holes are arranged at intervals in a width direction of the second cover.