CN215599435U - Imaging device for manually adjusting back focus - Google Patents

Imaging device for manually adjusting back focus Download PDF

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Publication number
CN215599435U
CN215599435U CN202122345485.6U CN202122345485U CN215599435U CN 215599435 U CN215599435 U CN 215599435U CN 202122345485 U CN202122345485 U CN 202122345485U CN 215599435 U CN215599435 U CN 215599435U
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China
Prior art keywords
focusing
detector
nut
frame
hole
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CN202122345485.6U
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Chinese (zh)
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王慧清
王丽娜
陈亚娟
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Wuhan Guide Sensmart Tech Co ltd
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Wuhan Guide Sensmart Tech Co ltd
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Abstract

The utility model relates to an imaging device for manually adjusting back focus, which comprises a frame, a detector support, a detector arranged on the detector support and a lens arranged on the frame through the lens support, wherein a detector slide rail and a detector driving mechanism are arranged on the frame, the detector support is arranged on the detector slide rail in a sliding manner, the detector driving mechanism comprises a focusing hand wheel and a transmission structure, the detector support is connected with the transmission structure, and the lens and the focusing hand wheel are respectively arranged at the front end and the rear end of the frame. According to the imaging device provided by the utility model, the detector driving mechanism drives the detector bracket to move so as to adjust the distance between the detector and the lens, so that the focusing function is realized, the imaging device can work together with the lens without the focusing function, and the size and the weight of the imaging device are obviously reduced; because the focusing hand wheel is arranged at the rear end of the frame, the operation is convenient, and the problems that the operation space requirement is large, the optical axis of a lens imaging device and the optical axis of a detector are likely to be relatively deviated and the like in focusing modes such as a focusing barrel and the like can be solved.

Description

Imaging device for manually adjusting back focus
Technical Field
The utility model belongs to the technical field of infrared imaging, and particularly relates to an imaging device for manually adjusting back focus.
Background
In the infrared imaging apparatus, a focusing operation is required to ensure the sharpness of imaging. The existing focusing operation generally adopts a focusing tube focusing mode, and has the problems of large overall dimension, heavy weight and the like of an infrared imaging device; usually, the focusing barrel is arranged at the front side of the equipment, and the focusing barrel can be arranged at the rearmost end of the equipment when observed by human eyes, and when the focusing barrel is used for focusing operation, the user needs to stretch hands forwards, so that the operation is inconvenient, and in places such as a long and narrow space, the operating space is limited, and the user cannot easily stretch hands into the narrow space around the equipment; in addition, when a rotary focusing mode is adopted, due to machining errors of structural parts, the imaging optical axis of the lens can rotate around the optical axis of the detector, and imaging precision is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model relates to an imaging device for manually adjusting back focus, which can at least solve part of defects of the prior art.
The utility model relates to an imaging device for manually adjusting back focus, which comprises a frame, a detector support, a detector and a lens, wherein the detector is arranged on the detector support, the lens is arranged on the frame through a lens support, a detector slide rail and a detector driving mechanism are arranged on the frame, the detector support is arranged on the detector slide rail in a sliding manner, the detector driving mechanism comprises a focusing hand wheel and a transmission structure, the detector support is connected with the transmission structure, and the lens and the focusing hand wheel are respectively arranged at the front end and the rear end of the frame.
As one embodiment, the transmission structure includes a focusing screw and a focusing nut screwed with the focusing screw, the focusing screw is in transmission connection with the focusing hand wheel, and the focusing nut is disposed on the detector support.
In one embodiment, the focus screw is sleeved with a first spring, one end of the first spring abuts against the focus nut, and the other end of the first spring abuts against the frame.
As one embodiment, the transmission structure further includes a nut seat fixedly connected to the detector support, the nut seat is provided with a screw through hole, the focusing nut is limited in the screw through hole, and a wear pad is further disposed in the screw through hole, and the focusing nut is a half nut and forms a hoop surrounding the focusing screw with the wear pad.
In one embodiment, a guide hole is formed in a hole wall on one side of the screw through hole, a guide post is arranged on an outer ring wall of the focusing nut, the guide post is partially slidably arranged in the guide hole, a second spring is sleeved on the guide post, and two ends of the second spring are respectively abutted against the outer ring wall of the focusing nut and the hole wall of the screw through hole.
In one embodiment, the focusing hand wheel is provided with a driving gear, the focusing screw is fixed with a driven gear, the focusing hand wheel and the focusing screw are both rotatably mounted on the frame, and the driving gear is engaged with the driven gear.
As one embodiment, the focusing screw is rotatably inserted into the frame and a position-limiting snap spring is disposed at the insertion hole.
As one embodiment, a sliding block matched with the detector sliding rail is arranged on the detector support, and a gap eliminating module is arranged between the sliding block and the detector sliding rail.
As one embodiment, the gap eliminating module includes a gap eliminating elastic sheet, and one end of the gap eliminating elastic sheet is fixedly connected with the sliding block and the other end of the gap eliminating elastic sheet abuts against the detector sliding rail.
In an embodiment, the above-mentioned imaging apparatus with manual back focus adjustment further includes a shutter, and the shutter is disposed on the detector support.
The utility model has at least the following beneficial effects:
according to the imaging device provided by the utility model, the detector driving mechanism drives the detector bracket to move so as to adjust the distance between the detector and the lens, so that the focusing function is realized, the imaging device can work together with the lens without the focusing function, and the size and the weight of the imaging device can be obviously reduced; because the focusing hand wheel is arranged at the rear end of the frame, the operation is convenient, and the problems that the operation space requirement is large, the optical axis of a lens imaging device and the optical axis of a detector are likely to be relatively deviated and the like in focusing modes such as a focusing barrel and the like can be solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic top view of an imaging device according to an embodiment of the present invention;
fig. 2 is a schematic front view of an image forming apparatus according to an embodiment of the present invention;
fig. 3 is a schematic view of an arrangement structure of a focusing nut according to an embodiment of the present invention;
fig. 4 is an exploded view of an image forming apparatus according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, 2 and 4, an embodiment of the present invention provides an imaging device for manually adjusting back focus, including a frame 2, a detector support 3, a detector 31 installed on the detector support 3, and a lens 1 installed on the frame 2 through a lens support, where the frame 2 is provided with a detector slide rail 61 and a detector driving mechanism, the detector support 3 is slidably installed on the detector slide rail 61, and the detector driving mechanism includes a focusing hand wheel 51 and a transmission structure, where the detector support 3 is connected with the transmission structure, and the lens 1 and the focusing hand wheel 51 are respectively arranged at front and rear ends of the frame 2.
In one embodiment, the frame 2 may be a shell frame or a frame, and the detector 31, the detector support 3, and the like are accommodated in a shell cavity in the shell frame or in a frame area of the frame, so as to perform a protection function. The detector 31 is preferably an infrared detector 31.
Generally, as shown in fig. 1, 2 and 4, the imaging device further comprises a shutter 4, wherein the shutter 4 is preferably arranged on the detector support 3 (generally located between the detector 31 and the lens 1) and moves together with the detector support 3, so that the imaging reliability can be ensured. In addition, the imaging device further comprises an imaging circuit board 7, the detector 31 is electrically connected with the imaging circuit board 7, and preferably, the imaging circuit board 7 is also arranged on the detector support 3, preferably, is positioned on one side of the detector support 3 far away from the lens 1 and can move together with the detector support 3 so as to ensure the working reliability of the imaging device.
It can be understood that the above-mentioned detector driving mechanism is used for driving the detector support 3 to slide along the detector slide rail 61, wherein the focusing hand wheel 51 is a power source, and the transmission structure realizes the transmission connection between the focusing hand wheel 51 and the detector support 3. In one embodiment, as shown in fig. 1, 2 and 4, the transmission structure includes a focusing screw 52 and a focusing nut 531 screwed with the focusing screw 52, the focusing screw 52 is in transmission connection with the focusing handwheel 51, and the focusing nut 531 is arranged on the detector support 3; the focusing screw 52 and the focusing nut 531 form a screw mechanism, and the focusing screw 52 rotates to drive the focusing nut 531 to do linear motion, so as to drive the detector bracket 3 to do linear motion, thereby realizing the adjustment of the distance between the detector 31 and the lens 1 and achieving the purpose of focusing. The lead screw mechanism is adopted for transmission, the working reliability is high, and a relatively large driving stroke can be obtained in a limited space, so that the size of equipment can be effectively reduced under the condition of meeting the focusing operation requirement, and the miniaturization design of the infrared imaging device is facilitated.
For the connection between the focusing hand wheel 51 and the focusing screw 52, the two can be directly and fixedly connected; in another embodiment, as shown in fig. 1, 2 and 4, a driving gear 56 is disposed on the focus hand wheel 51, a driven gear 57 is fixed on the focus screw 52, the focus hand wheel 51 and the focus screw 52 are both rotatably mounted on the frame 2, and the driving gear 56 is engaged with the driven gear 57.
Further preferably, the focus screw 52 is rotatably disposed on the frame 2 in a penetrating manner, and a limiting snap spring 58 is disposed at the penetrating hole, so that the focus screw 52 can only rotate and the axial displacement of the focus screw 52 can be avoided under the action of the limiting snap spring 58. The installation of the limit clamp spring 58 is conventional and will not be described in detail here.
Further preferably, as shown in fig. 1, 2 and 4, a first spring 55 is sleeved on the focus screw 52, one end of the first spring 55 abuts against the focus nut 531, and the other end of the first spring 55 abuts against the frame 2. Preferably, the first spring 55 is located on the front side of the focus nut 531/finder support 3, i.e., on the side of the focus nut 531 near the lens 1. Preferably, the first spring 55 is in a compressed state during both the focusing operation and normal use of the imaging device. Through setting up first spring 55, under its elasticity effect, can reduce or even eliminate the influence that the thread clearance between focusing nut 531 and focusing screw 52 brought to guarantee the displacement accuracy of detector support 3, improve focusing accuracy effectively.
As a preferable solution of this embodiment, as shown in fig. 1, fig. 2 and fig. 4, the transmission structure further includes a nut seat 54 fixedly connected to the detector support 3, a screw through hole is formed on the nut seat 54, the focusing nut 531 is defined in the screw through hole and a wear pad 532 is further disposed in the screw through hole, the focusing nut 531 is a half nut and forms a hoop surrounding the focusing screw 52 with the wear pad 532. The wear pad 532 may be fixed on the hole wall of the screw via hole, for example, by using an adhesive; the wear pad 532 may be in the shape of a half-circle ring or the like, suitable for assembling with a half-nut to form a ring with a circular hole. The focusing nut 531 may also be fixed to the hole wall of the screw through hole; in another scheme, as shown in fig. 3, a guide hole is formed in a hole wall on one side of the screw via hole, a guide post 5311 is formed in an outer ring wall of the focusing nut 531, the guide post 5311 is partially slidably disposed in the guide hole, a second spring 533 is sleeved on the guide post 5311, and two ends of the second spring 533 are respectively abutted to the outer ring wall of the focusing nut 531 and the hole wall of the screw via hole; the axis of the guide post 5311 is preferably intersected with the axis of the focus screw 52, that is, the guide post 5311 is disposed along the radial direction of the focus nut 531; the focusing nut 531 can be limited by the matching of the guide hole and the guide post 5311, so that the focusing nut 531 is prevented from generating displacement along the axial direction of the focusing screw 52; and through setting up second spring 533, under its elasticity effect, can reduce or even eliminate the influence that the thread clearance between focusing nut 531 and focusing screw 52 brought to guarantee the displacement accuracy of detector support 3, improve the focusing precision effectively. In addition, based on the above-mentioned half nut and wear pad 532 combined structure, under an abnormal condition (for example, the focus screw 52 is overloaded and jammed), the focus screw 52 can be forcibly rotated, so as to achieve the effect of readjusting and distributing the gap between the half nut, the wear pad 532 and the focus screw 52, thereby better protecting the focus screw 52.
In the above-described embodiment in which the first spring 55 is provided, one end of the first spring 55 may abut against the frame 2, and the other end may abut against the nut holder 54. Particularly, under the cooperation of the first spring 55 and the second spring 533, the displacement accuracy of the probe holder 3 can be reliably ensured, and the focusing accuracy can be remarkably improved.
Further optimize above-mentioned imaging device, be equipped with on the detector support 3 with the slider 62 of detector slide rail 61 cooperation, slider 62 with be equipped with the clearance elimination module between the detector slide rail 61. The prior art structures adapted to control the gap in the slider 62-slide rail 61 structure are suitable for this embodiment; in one embodiment, as shown in fig. 2 and 4, the gap eliminating module includes a gap eliminating elastic sheet 63, and one end of the gap eliminating elastic sheet 63 is fixedly connected with the sliding block 62 and the other end abuts against the detector sliding rail 61. Specifically, the sliding block 62 is fixed relative to the detector support 3, one end of the gap eliminating elastic sheet 63 is fixed to the sliding block 62 or fixed to the detector support 3, and the other end of the gap eliminating elastic sheet 63 preferably abuts against the side wall of the detector sliding rail 61; for convenience of installation, the gap-eliminating spring 63 may be formed by multiple bending structures, for example, one end of the gap-eliminating spring is disposed on the top of the slider 62, and then bent to pass by the side of the slider 62 or to pass by the periphery of the rack 2 and then to abut against the side wall of the slide rail 61.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (10)

1. The utility model provides an image device that burnt after manual accent, includes frame, detector support, installs detector on the detector support and installs through the lens holder camera lens in the frame which characterized in that: the detector comprises a frame, and is characterized in that a detector slide rail and a detector driving mechanism are arranged on the frame, a detector support is slidably arranged on the detector slide rail, the detector driving mechanism comprises a focusing hand wheel and a transmission structure, wherein the detector support is connected with the transmission structure, and a lens and the focusing hand wheel are respectively arranged at the front end and the rear end of the frame.
2. The manually adjusted back focus imaging apparatus of claim 1, wherein: the transmission structure comprises a focusing screw and a focusing nut in threaded connection with the focusing screw, the focusing screw is in transmission connection with the focusing hand wheel, and the focusing nut is arranged on the detector support.
3. The manually adjusted back focus imaging apparatus of claim 2, wherein: the focusing screw is sleeved with a first spring, one end of the first spring is abutted to the focusing nut, and the other end of the first spring is abutted to the rack.
4. The manually adjusted back focus imaging apparatus of claim 2, wherein: the transmission structure further comprises a nut seat fixedly connected with the detector support, a screw rod through hole is formed in the nut seat, the focusing nut is limited in the screw rod through hole, a wear-resistant pad is further arranged in the screw rod through hole, and the focusing nut is a half nut and forms a hoop for holding the focusing screw rod in a surrounding mode with the wear-resistant pad.
5. The manually adjusted back focus imaging apparatus of claim 4, wherein: the hole wall of one side of the screw rod through hole is provided with a guide hole, the outer ring wall of the focusing nut is provided with a guide post, the guide post is partially arranged in the guide hole in a sliding manner, the guide post is sleeved with a second spring, and two ends of the second spring are respectively abutted against the outer ring wall of the focusing nut and the hole wall of the screw rod through hole.
6. The manually adjusted back focus imaging apparatus of claim 2, wherein: the focusing hand wheel is provided with a driving gear, a driven gear is fixed on the focusing screw, the focusing hand wheel and the focusing screw are both rotatably installed on the rack, and the driving gear is meshed with the driven gear.
7. The manually adjusted back focus imaging apparatus of claim 2, wherein: the focusing screw rod is rotatably arranged on the frame in a penetrating mode and is provided with a limiting clamp spring at the penetrating hole.
8. The manually adjusted back focus imaging apparatus of claim 1, wherein: the detector support is provided with a sliding block matched with the detector sliding rail, and a clearance elimination module is arranged between the sliding block and the detector sliding rail.
9. The manually adjusted back focus imaging apparatus of claim 8, wherein: the clearance elimination module comprises a clearance elimination elastic sheet, one end of the clearance elimination elastic sheet is fixedly connected with the sliding block, and the other end of the clearance elimination elastic sheet abuts against the detector sliding rail.
10. The manually adjusted back focus imaging apparatus of claim 1, wherein: also included is a shutter disposed on the detector support.
CN202122345485.6U 2021-09-26 2021-09-26 Imaging device for manually adjusting back focus Active CN215599435U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202122345485.6U CN215599435U (en) 2021-09-26 2021-09-26 Imaging device for manually adjusting back focus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202122345485.6U CN215599435U (en) 2021-09-26 2021-09-26 Imaging device for manually adjusting back focus

Publications (1)

Publication Number Publication Date
CN215599435U true CN215599435U (en) 2022-01-21

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114740623A (en) * 2022-04-13 2022-07-12 歌尔股份有限公司 Lens module and head-mounted display device
CN115086529A (en) * 2022-07-06 2022-09-20 东莞市维斗科技股份有限公司 New-type high accuracy focusing drive structure
CN115112242A (en) * 2022-07-08 2022-09-27 东莞市维斗科技股份有限公司 Be applied to ABF module of thermal imaging infrared tester

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114740623A (en) * 2022-04-13 2022-07-12 歌尔股份有限公司 Lens module and head-mounted display device
CN115086529A (en) * 2022-07-06 2022-09-20 东莞市维斗科技股份有限公司 New-type high accuracy focusing drive structure
CN115086529B (en) * 2022-07-06 2024-05-10 东莞市维斗科技股份有限公司 High-precision focusing driving structure
CN115112242A (en) * 2022-07-08 2022-09-27 东莞市维斗科技股份有限公司 Be applied to ABF module of thermal imaging infrared tester

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