CN114002801B - Lens focusing mechanism for head-mounted thermal imager - Google Patents
Lens focusing mechanism for head-mounted thermal imager Download PDFInfo
- Publication number
- CN114002801B CN114002801B CN202111411659.2A CN202111411659A CN114002801B CN 114002801 B CN114002801 B CN 114002801B CN 202111411659 A CN202111411659 A CN 202111411659A CN 114002801 B CN114002801 B CN 114002801B
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- China
- Prior art keywords
- lens
- head
- thermal imager
- mounted thermal
- focusing mechanism
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- 238000001931 thermography Methods 0.000 abstract description 18
- 230000007774 longterm Effects 0.000 abstract 1
- 238000005299 abrasion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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
-
- 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
- G03B11/00—Filters or other obturators specially adapted for photographic purposes
- G03B11/04—Hoods or caps for eliminating unwanted light from lenses, viewfinders or focusing aids
- G03B11/043—Protective lens closures or lens caps built into cameras
-
- 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
- G03B13/00—Viewfinders; Focusing aids for cameras; Means for focusing for cameras; Autofocus systems for cameras
- G03B13/32—Means for focusing
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
本发明属于红外热成像领域，具体的说是一种头戴式热成像仪用镜头调焦机构，包括镜头调焦机构本体和镜头盖本体，所述镜头调焦机构本体的底部设置有头戴式热成像仪主壳体，所述镜头盖本体的底部设置有头戴式热成像仪主壳体，所述头戴式热成像仪主壳体包括固定座，所述镜头调焦机构本体包括调距压圈、镜筒、滑槽凸轮筒、调距螺钉和调焦环，所述镜筒的外壁设置调距螺钉，所述镜筒的外壁设置滑槽凸轮筒；通过手指拨动调焦机构的拨杆来实现调焦需求，解决了现有红外镜头焦距较小(≤15mm)时不方便调焦的问题，同时与红外镜头机构相配合的镜头盖采用卡扣式配合以及按钮式操作可有效解决现有镜头盖长时间使用固定失效的问题。
The invention belongs to the field of infrared thermal imaging, and specifically is a lens focusing mechanism for a head-mounted thermal imager, comprising a lens focusing mechanism body and a lens cover body, wherein a head-mounted thermal imager main shell is arranged at the bottom of the lens focusing mechanism body, a head-mounted thermal imager main shell is arranged at the bottom of the lens cover body, the head-mounted thermal imager main shell comprises a fixing seat, the lens focusing mechanism body comprises a distance adjustment pressure ring, a lens barrel, a slide groove cam barrel, a distance adjustment screw and a focusing ring, the outer wall of the lens barrel is provided with a distance adjustment screw, and the outer wall of the lens barrel is provided with a slide groove cam barrel; the focusing requirement is achieved by moving a lever of the focusing mechanism by fingers, thereby solving the problem that it is inconvenient to focus when the focal length of the existing infrared lens is small (≤15mm), and at the same time, the lens cover matched with the infrared lens mechanism adopts a snap-on match and a button operation, thereby effectively solving the problem that the existing lens cover fails to be fixed after long-term use.
Description
Technical Field
The invention relates to the field of infrared thermal imaging, in particular to a lens focusing mechanism for a head-mounted thermal imager.
Background
In order to obtain clear images, the infrared lens is usually driven by a manual rotary focusing wheel to realize focusing operation, when the focal length of the infrared lens is smaller (less than or equal to 15 mm), the caliber of the lens is smaller, the outline size of a corresponding focusing hand wheel is smaller, focusing is not very convenient by screwing the focusing wheel, and meanwhile, a lens cover matched with the infrared lens is usually fixed in an interference fit mode of a plastic piece and a silicone rubber piece, so that the problems of abrasion of parts at the joint, the fixation failure of the lens cover and the like exist after the infrared lens is used for a long time;
accordingly, a lens focusing mechanism for a thermal imaging head has been proposed to solve the above-described problems.
Disclosure of Invention
In order to make up for the defects of the prior art, in order to obtain clear images, the infrared lens at present adopts a manual rotation focusing wheel to drive an inner lens barrel to realize focusing operation, when the focal length of the infrared lens is smaller (less than or equal to 15 mm), the caliber of a lens is smaller, the outline size of a corresponding focusing hand wheel is smaller, at the moment, focusing by screwing the focusing wheel by hand is not very convenient, and meanwhile, a lens cover matched with the infrared lens is fixed in an interference fit mode of a plastic piece and a silicon rubber piece, so that the problems of abrasion of a part fitting part, failure of lens cover fixing and the like exist after the lens focusing mechanism for the head-mounted thermal imager are provided.
The invention solves the technical problems by adopting the technical scheme that the lens focusing mechanism for the head-mounted thermal imaging instrument comprises a lens focusing mechanism body and a lens cap body, wherein the bottom of the lens focusing mechanism body is provided with a head-mounted thermal imaging instrument main shell, the bottom of the lens cap body is provided with the head-mounted thermal imaging instrument main shell, the head-mounted thermal imaging instrument main shell comprises a fixed seat, the lens focusing mechanism body comprises a distance adjusting pressure ring, a lens barrel, a chute cam barrel, a distance adjusting screw and a focusing ring, the outer wall of the lens barrel is provided with the distance adjusting screw, the outer wall of the lens barrel is provided with the chute cam barrel, and the outer wall of the chute cam barrel is provided with the focusing ring;
The focusing ring and the sliding groove cam cylinder are matched in a clamping groove mode, the focusing ring and the sliding groove cam cylinder form a whole during focusing, the sliding groove cam cylinder is connected with the fixing seat and the lens barrel through a distance adjusting screw, and the lens cap body comprises a lens cap main body, a spring, a button, a cylindrical pin A, a double torsion spring and a cylindrical pin B;
the double torsion spring comprises a double pin and a check ring, one end of the double pin is fixedly connected with the check ring, one side of the double torsion spring is provided with a lens cover main body, the front surface of the lens cover main body is provided with a cylindrical pin A, the outer wall of the cylindrical pin A is provided with a button, and the bottom of the button is provided with a spring.
Can more effectual leg focusing ring control through the driving lever, can effectually ensure the torsion effect of two torsional springs through the cooperation work between bipedal and the retaining ring, can effectually promote installation and dismantlement efficiency through the screw connection, also have better guarantee to fixed stability.
Preferably, the lens cap body is connected with the main shell of the head-mounted thermal imaging device through a cylindrical pin B, and the cylindrical pin B and the main shell of the head-mounted thermal imaging device form a penetrating structure, so that the position fixing stability of the lens cap body can be ensured more stably through the cylindrical pin B.
Preferably, the distance-adjusting pressing ring is in threaded connection with the fixing seat, when the lens focuses, the shifting rod of the focusing ring is shifted to drive the sliding groove cam barrel to rotate, and the isomorphic shifting rod is controlled to rotate, so that the rotation efficiency and stability can be effectively improved.
Preferably, the double pins at two ends of the double torsion spring are inserted into the round holes of the lens cover main body, the retainer ring in the middle of the double torsion spring is inserted into the main shell of the head-mounted thermal imaging camera, and the connection position of the lens cover main body can be more stably limited by the double pins of the double torsion spring, so that the running stability of the double torsion spring is better ensured.
Preferably, the lens cover can be closed when the lens cover main body is pressed, at the moment, the buckling position of the button is matched with the limiting boss of the focusing ring, and the lens cover main body can be controlled more conveniently through the button.
The invention has the advantages that:
According to the invention, the focusing requirement is realized by stirring the shift lever of the focusing mechanism by fingers, the problem that focusing is inconvenient when the focal length of the existing infrared lens is smaller (less than or equal to 15 mm) is solved, meanwhile, the lens cover matched with the infrared lens mechanism adopts the snap fit and button type operation, the problem that the existing lens cover is invalid when being used for a long time can be effectively solved, the lens cover can be conveniently operated when the focal length of the infrared lens is smaller (less than or equal to 15 mm), the lens cover is fixed by the button type snap fit, and the fixing mode is reliable and is not easy to lose efficacy when being used for a long time.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions of the prior art, the drawings which are used in the description of the embodiments or the prior art will be briefly described, it being obvious that the drawings in the description below are only some embodiments of the invention, and that other drawings can be obtained from these drawings without inventive faculty for a person skilled in the art.
FIG. 1 is a partial perspective view of the present invention mounted on a thermal headset;
FIG. 2 is a cross-sectional view of the lens cover of the present invention when closed;
FIG. 3 is a cross-sectional view of the lens cover of the present invention as it is opened;
FIG. 4 is a schematic view of a focusing ring structure according to the present invention;
FIG. 5 is a schematic view of a double torsion spring according to the present invention.
1, A main shell of a head-mounted thermal imaging instrument; 11, a fixed seat, 2, a lens focusing mechanism body, 21, a distance adjusting pressing ring, 22, a lens barrel, 23, a chute cam barrel, 24, a distance adjusting screw, 25, a focusing ring, 251, a deflector rod, 252, a limiting boss, 3, a lens cover body, 31, a lens cover body, 32, a spring, 33, a button, 34, a cylindrical pin A, 35, a double torsion spring, 351, a double pin, 352, a retainer ring, 36 and a cylindrical pin B.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-5, a lens focusing mechanism for a head-mounted thermal imager is characterized by comprising a lens focusing mechanism body 2 and a lens cap body 3, wherein a head-mounted thermal imager main shell 1 is arranged at the bottom of the lens focusing mechanism body 2, a head-mounted thermal imager main shell 1 is arranged at the bottom of the lens cap body 3, the head-mounted thermal imager main shell 1 comprises a fixed seat 11, the lens focusing mechanism body 2 comprises a distance adjusting pressure ring 21, a lens barrel 22, a chute cam cylinder 23, a distance adjusting screw 24 and a focusing ring 25, the outer wall of the lens barrel 22 is provided with the distance adjusting screw 24, the outer wall of the lens barrel 22 is provided with the chute cam cylinder 23, and the outer wall of the chute cam cylinder 23 is provided with the focusing ring 25;
the focusing ring 25 comprises a deflector 251 and a limiting boss 252, the deflector 251 is arranged on the outer wall of the limiting boss 252, the distance adjusting pressure ring 21 is arranged on the outer wall of the lens barrel 22, the focusing ring 25 is matched with the chute cam cylinder 23 in a clamping groove mode, the focusing ring 25 and the chute cam cylinder 23 form a whole during focusing, the chute cam cylinder 23 is connected with the fixing seat 11 and the lens barrel 22 through the distance adjusting screw 24, the lens cap body 3 comprises a lens cap main body 31, a spring 32, a button 33, a cylindrical pin A34, a double torsion spring 35 and a cylindrical pin B36, and the double torsion spring 35 is arranged on the outer wall of the cylindrical pin B36;
the double torsion spring 35 comprises a double pin 351 and a retainer ring 352, one end of the double pin 351 is fixedly connected with the retainer ring 352, one side of the double torsion spring 35 is provided with a lens cover main body 31, the front surface of the lens cover main body 31 is provided with a cylindrical pin A34, the outer wall of the cylindrical pin A34 is provided with a button 33, and the bottom of the button 33 is provided with a spring 32.
In the embodiment, the lens cover body 3 is connected with the main head-mounted thermal imaging device housing 1 through the cylindrical pin B36, and the cylindrical pin B36 and the main head-mounted thermal imaging device housing 1 form a penetrating structure, so that the lens cover body 3 can be better rotated with the main head-mounted thermal imaging device housing 1 through the cylindrical pin B36 during operation.
In this embodiment, the distance-adjusting pressing ring 21 is connected with the fixing base 11 through threads, and the sliding groove cam cylinder 23 is driven to rotate by stirring the shift lever 251 of the focusing ring 25 when the lens focuses, so that the connection efficiency between the distance-adjusting pressing ring 21 and the fixing base 11 can be better improved during working.
In this embodiment, the double pins 351 at two ends of the double torsion spring 35 are inserted into the circular holes of the lens cover main body 31, and the retainer rings 352 in the middle of the double torsion spring 35 are inserted into the head-mounted thermal imaging camera main body 1, so that the position fixing stability of the double torsion spring 35 can be better improved when the device is used during operation.
In this embodiment, the lens cover can be closed when the lens cover main body 31 is pressed, and the fastening position of the button 33 is matched with the limiting boss 252 of the focusing ring 25, so that the fixing stability of the lens cover main body 31 can be better ensured during operation.
The working principle is that the side wall of a fixed seat 11 at the upper end of a main shell 1 of the head-mounted thermal imaging device is provided with a runway type limit groove, the limit groove can control the focusing stroke of a lens, a focusing ring 25 is matched with a chute cam cylinder 23 in a clamping groove mode, the focusing ring 25 and the chute cam cylinder 23 are used as a whole for rotating movement during focusing, the gap between a distance adjusting pressure ring 21 and the focusing ring 25 is adjusted to control the hand feeling during focusing, the side wall of the focusing ring 25 is provided with a deflector 251, the deflector 251 on the side wall of the focusing ring 25 is used for driving the chute cam cylinder 23 to rotate during lens focusing, the cam cylinder rotates and drives the distance adjusting screw 24 to drive the lens barrel 22 to do linear motion in the fixed seat 11 to meet the focusing requirement, the double pins 351 at two ends of the double torsion spring 35 are inserted into the round holes of the lens cap main body 31, the check rings 352 in the middle of the double torsion spring 35 are inserted into the head-mounted thermal imaging camera main shell 1, the double torsion spring 35 can be designed into different angles according to the turnover angle of the lens cap, the lens cap can be closed when the lens cap main body 31 is pressed, at the moment, the clamping position of the button 33 is matched with the limiting boss 252 of the focusing ring 25, and when the button 33 is pressed, the clamping position is separated from the limiting boss 252 of the focusing ring 25, and the lens cap can be opened.
In the description of the present specification, the descriptions of the terms "one embodiment," "example," "specific example," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111411659.2A CN114002801B (en) | 2021-11-25 | 2021-11-25 | Lens focusing mechanism for head-mounted thermal imager |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111411659.2A CN114002801B (en) | 2021-11-25 | 2021-11-25 | Lens focusing mechanism for head-mounted thermal imager |
Publications (2)
| Publication Number | Publication Date |
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| CN114002801A CN114002801A (en) | 2022-02-01 |
| CN114002801B true CN114002801B (en) | 2024-12-27 |
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| CN202111411659.2A Active CN114002801B (en) | 2021-11-25 | 2021-11-25 | Lens focusing mechanism for head-mounted thermal imager |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216718785U (en) * | 2021-11-25 | 2022-06-10 | 湖北视拓光电科技有限公司 | Lens focusing mechanism and lens cap for head-wearing thermal imager |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10312003A (en) * | 1997-05-14 | 1998-11-24 | Canon Inc | Barrier opening and closing device and camera |
| US6033130A (en) * | 1997-10-27 | 2000-03-07 | Olympus Optical Co., Ltd. | Lens cover and a lens cover support assembly mounted external to a lens barrel |
| KR100509371B1 (en) * | 2002-08-30 | 2005-08-18 | 삼성테크윈 주식회사 | Lens cap assembly for a camera |
| CN1246733C (en) * | 2002-08-30 | 2006-03-22 | 三星泰科株式会社 | Lens cover assembly of cameru |
| JP4910138B2 (en) * | 2006-08-18 | 2012-04-04 | ペンタックスリコーイメージング株式会社 | Lens barrel with focus adjustment mechanism |
| CN101907760A (en) * | 2009-06-05 | 2010-12-08 | 北京红源光电技术公司 | Built-in lens and thermal infrared imager adopting same |
| JP5948975B2 (en) * | 2012-03-06 | 2016-07-06 | 株式会社リコー | Lens cap |
| CN204903850U (en) * | 2015-08-05 | 2015-12-23 | 福建福光股份有限公司 | Continuous varifocal camera lens in big visual field of high resolution |
| CN110879452A (en) * | 2019-12-06 | 2020-03-13 | 湖北华中光电科技有限公司 | Continuous focusing mechanism and corresponding lens |
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2021
- 2021-11-25 CN CN202111411659.2A patent/CN114002801B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN216718785U (en) * | 2021-11-25 | 2022-06-10 | 湖北视拓光电科技有限公司 | Lens focusing mechanism and lens cap for head-wearing thermal imager |
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| CN114002801A (en) | 2022-02-01 |
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