CN107461588B - Tripod adjusting and locking mechanism - Google Patents
Tripod adjusting and locking mechanism Download PDFInfo
- Publication number
- CN107461588B CN107461588B CN201710738499.XA CN201710738499A CN107461588B CN 107461588 B CN107461588 B CN 107461588B CN 201710738499 A CN201710738499 A CN 201710738499A CN 107461588 B CN107461588 B CN 107461588B
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- angle
- adjusting block
- tripod
- angle adjusting
- teeth
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- 230000007246 mechanism Effects 0.000 title claims abstract description 19
- 210000003108 foot joint Anatomy 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 210000001503 joint Anatomy 0.000 claims 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16M—FRAMES, CASINGS OR BEDS OF ENGINES, MACHINES OR APPARATUS, NOT SPECIFIC TO ENGINES, MACHINES OR APPARATUS PROVIDED FOR ELSEWHERE; STANDS; SUPPORTS
- F16M11/00—Stands or trestles as supports for apparatus or articles placed thereon ; Stands for scientific apparatus such as gravitational force meters
- F16M11/20—Undercarriages with or without wheels
- F16M11/24—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other
- F16M11/26—Undercarriages with or without wheels changeable in height or length of legs, also for transport only, e.g. by means of tubes screwed into each other by telescoping, with or without folding
- F16M11/32—Undercarriages for supports with three or more telescoping legs
- F16M11/34—Members limiting spreading of legs, e.g. "umbrella legs"
-
- 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
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/56—Accessories
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Pivots And Pivotal Connections (AREA)
- Accessories Of Cameras (AREA)
Abstract
The invention provides an adjusting and locking mechanism of a tripod, which comprises an angle clamping structure, a foot joint and an adjusting structure. The adjusting structure comprises an angle adjusting block and a reset elastic piece, wherein the angle adjusting block comprises a locking part, a triggering part and a dovetail groove, the locking part is used for being combined and locked with the clamping position, the triggering part drives under the force application of a driving tooth to enable the angle adjusting block to rebound and reset, two ends of the reset elastic piece are elastically propped against the groove wall of the dovetail groove, and when the angle adjusting block is moved, the reset elastic piece slides relative to the groove wall of the dovetail groove and gives the angle adjusting block reset elastic force. The invention can automatically reset and lock the angle adjusting block only in the process of rotation adjustment, does not need repeated push-pull, has simple and convenient operation, is fast and labor-saving, reduces the push-pull times and prolongs the service life of the product; meanwhile, the manual reset locking function is reserved, and the two operation modes can be flexibly selected by a user.
Description
Technical Field
The invention relates to the field of photographic equipment, in particular to an adjusting and locking mechanism of a tripod.
Background
The adjusting and locking mechanism of the tripod is a mechanism for locking and fixing different gears when the opening angle of the tripod supporting legs is adjusted. The adjusting and locking mechanism of the tripod in the prior art is mainly adjusted and locked by adopting a button mode, and the adjusted gear is locked by manually pressing the button after the button is unlocked for adjustment or is manually separated from the clamping position for adjustment; the former needs to keep the state of pressing the button in the whole adjusting process, which is troublesome and laborious; the latter needs to be unlocked and locked through manual repeated push-pull, and the operation is tedious and not flexible and automatic.
Disclosure of Invention
In order to solve the problems, the invention provides an adjusting and locking mechanism of a tripod, which aims to flexibly and automatically adjust and lock the tripod, and is quick and labor-saving.
The invention provides an adjusting and locking mechanism of a tripod, which comprises an angle clamping structure, a foot joint and an adjusting structure, wherein the angle clamping structure is fixedly arranged on a tripod body and provided with a plurality of clamping positions, the foot joint is arranged on a supporting foot of the tripod and hinged with the angle clamping structure, the adjusting structure is arranged on the foot joint and is combined with the clamping positions to lock the opening angle of the supporting foot.
The clamping position consists of a plurality of convex teeth, wherein the convex teeth comprise a driving tooth.
The adjusting structure comprises an angle adjusting block and a reset elastic piece, wherein the angle adjusting block comprises a locking part, a raised triggering part and a dovetail groove, the locking part corresponds to the shape of the clamping position, the locking part is used for being combined and locked with the clamping position, the triggering part is driven by the driving teeth to enable the angle adjusting block to rebound and reset, and the dovetail groove comprises a front part, an inclined part and a tail part.
The two ends of the reset spring piece are elastically propped against the groove wall of the dovetail groove, the reset spring piece slides relative to the groove wall of the dovetail groove when the angle adjusting block is moved, the reset spring piece is positioned at the front part of the dovetail groove and is fixed when the angle adjusting block is in a completely extended state, and when the driving tooth drives the reset spring piece to reset, the reset spring piece is separated from the front part of the dovetail groove and keeps a state of relatively sliding from the inclined part to the tail part, so that an inward reset elastic force is given to the angle adjusting block, and the locking part and the clamping position are combined and locked.
The foot joint is provided with a fixing groove for fixing the reset elastic piece.
In one or more embodiments of the present invention, the reset spring includes a middle housing and a telescopic pin at two ends of the housing, a spring is disposed in the housing, and two ends of the spring are connected with the telescopic pin, so that the telescopic pin is kept in an outwards-popped state.
In one or more embodiments of the present invention, a connection between a front portion of the dovetail groove and the inclined portion forms an inwardly narrowed corner, a connection between the inclined portion and the tail portion forms an outwardly protruded corner, and a guide groove extending from the front portion to the tail portion is provided on a groove wall of the dovetail groove.
In one or more embodiments of the present invention, the foot joint is provided with a set screw for limiting the angle adjusting block.
In one or more embodiments of the present invention, the two sides of the locking portion are provided with extending portions extending outwards, when the locking portion is used, the extending portions are pinched to pull the angle adjusting block, and when the angle adjusting block is reset, the extending portions are abutted against the foot joints.
In one or more embodiments of the present invention, the teeth are a first tooth, a second tooth and a driving tooth in the clockwise direction, the upper surface of the first tooth is a first clamping position, the first tooth and the second tooth are a second clamping position, and the second tooth and the driving tooth are a third clamping position.
In one or more embodiments of the present invention, the fixing groove is composed of two bosses.
In one or more embodiments of the present invention, the pin connector and the angle clamping structure are respectively provided with a shaft hole, the pin connector is hinged with the angle clamping structure by penetrating through the shaft holes through a connecting shaft, and the connecting shaft is fixed by a screw screwed into the end part of the connecting shaft.
In one or more embodiments of the present invention, a spacer is disposed between the shaft hole of the foot connector and the shaft hole of the angle detent structure.
Compared with the prior art, the invention has the following advantages:
according to the invention, through the cooperation of the angle adjusting block, the reset elastic piece and the structure of the foot joint, when the angle adjusting block is pulled outwards, the reset elastic piece slides relatively to the front part of the dovetail groove to clamp, at the moment, the locking part is separated from the clamping position to be in an unlocking state, the angle adjustment can be carried out through rotating the supporting foot, when the angle adjusting block and the supporting foot synchronously rotate until the driving tooth touch the triggering part, the angle adjusting block is retracted inwards to be combined with the clamping position under the pushing of the driving tooth, at the moment, the reset elastic piece is separated from the front part of the dovetail groove to keep a state of sliding relatively from the inclined part to the tail part, the inward reset elastic force of the angle adjusting block is endowed, the locking part is tightly attached to the clamping position to be locked, and the locking part is sequentially jumped into different clamping positions to be combined with the same through rotating the supporting foot to be locked by rotating the supporting foot, so that the automatic adjustment locking of different gears is realized; the angle adjusting block can be unlocked and locked again by manual pushing and pulling.
The invention can automatically reset and lock the angle adjusting block only in the process of rotation adjustment, does not need repeated push-pull, has simple and convenient operation, is fast and labor-saving, reduces the push-pull times and prolongs the service life of the product; meanwhile, the manual reset locking function is reserved, and the two operation modes can be flexibly selected by a user.
Drawings
Fig. 1 is an exploded view of the structure of the present invention.
Fig. 2 is a cross-sectional view of a portion of the structure of the present invention.
Fig. 3 is a partial cross-sectional view of a second embodiment of the present invention.
Fig. 4 is a cross-sectional view of a portion of the structure of the present invention.
Fig. 5 is a schematic view of the bottom structure of the angle adjusting block of the present invention.
Fig. 6 is a schematic view of the structure of the present invention in which the adjusting structure is mounted on the foot joint.
Fig. 7 isbase:Sub>A cross-sectional view of thebase:Sub>A-base:Sub>A plane of fig. 6.
Detailed Description
The present application is further described with reference to the following drawings:
referring to fig. 1-7, an adjusting and locking mechanism of a tripod comprises an angle clamping structure 1 fixedly arranged on a tripod body and provided with a plurality of clamping positions 10, a foot joint 20 installed on a supporting foot 2 of the tripod and hinged with the angle clamping structure 1, and an adjusting structure installed on the foot joint 20 and combined with the clamping positions 10 to lock and fix the opening angle of the supporting foot 2.
The detent 10 is formed by a plurality of teeth 11, including a driving tooth 110. The teeth 11 are a first tooth, a second tooth and a driving tooth 110 in sequence in the clockwise direction, the upper surface of the first tooth is a first clamping position 101, the first tooth and the second tooth are a second clamping position 102, and a third clamping position 103 is arranged between the second tooth and the driving tooth 110. The number of the clamping positions 10 can be appropriately increased or decreased according to the requirements of different numbers of gears.
The adjusting structure comprises an angle adjusting block 3 and a reset spring 4, the angle adjusting block 3 comprises a locking part 31, a raised triggering part 32 and a bottom dovetail groove 33, the locking part 31 is used for being combined and locked with the clamping position 10, the triggering part 32 is driven by the driving teeth 110 to enable the angle adjusting block 3 to rebound and reset, the dovetail groove 33 comprises a front part 330, an inclined part 331 and a tail part 332, the connecting part of the front part 330 and the inclined part 331 forms an inward narrowing corner, the connecting part of the inclined part 331 and the tail part 332 forms an outward protruding corner, and a guide groove 333 extending from the front part 330 to the tail part 332 is arranged on the wall of the dovetail groove 33, as shown in fig. 5.
The reset spring 4 comprises a middle shell 41 and telescopic pins 42 at two ends of the shell 41, a spring 43 is arranged in the shell 41, and two ends of the spring 43 are connected with the telescopic pins 42, so that the telescopic pins 42 are kept in an outwards-popped state. The end of the telescopic pin 42 falls into the guide groove 333 and abuts against the guide groove, and when the angle adjusting block 3 is moved, the reset spring 4 slides relative to the groove wall of the dovetail groove 33, that is, the telescopic pin 42 slides relative to the guide groove 333.
A fixing groove for fixing the middle part of the reset elastic piece 4 is arranged in the middle of the foot joint 20, and consists of two bosses 24; the angle adjusting block 3 is covered on the fixed groove, positioning screws 25 for limiting the angle adjusting block 3 are arranged on two sides of the foot joint 20, and the positioning screws 25 are in clearance fit with the angle adjusting block 3, so that the angle adjusting block 3 can slide but cannot be separated from the foot joint 20.
The two sides of the locking part 31 are provided with extending parts 30 extending outwards, when the angle adjusting block 3 is pulled out by pinching the extending parts 30, and when the angle adjusting block 3 is reset, the extending parts 30 are propped against the foot joints 20.
The foot connector 20 and the angle clamping structure 1 are respectively provided with shaft holes 21 and 12, the foot connector 20 penetrates through the shaft holes 21 and 12 through a connecting shaft 22 to be hinged with the angle clamping structure 1, and the connecting shaft 22 is fixed through a screw 23 screwed into the end part of the connecting shaft 22. A gasket 13 is arranged between the shaft hole 21 of the foot joint 20 and the shaft hole 12 of the angle clamping structure 1, so that the abrasion of the foot joint 20 during the rotation of the supporting foot 2 is reduced.
When the invention is used, the extension part 30 is pinched to pull the angle adjusting block 3 outwards, the reset spring 4 relatively slides to the front part 330 of the dovetail groove 33, the telescopic pin 42 falls into the guide groove 333 to be clamped, and at the moment, the locking part 31 is separated from the clamping position 10 to be in an unlocking state, and the angle can be adjusted by rotating the supporting leg 2. When the angle adjusting block 3 rotates and lifts counterclockwise synchronously with the supporting leg 2 until the driving tooth 110 touches the triggering portion 32, as shown in fig. 2, the driving tooth 110 continuously lifts the triggering portion 32 to force the triggering portion 32 to move inwards, so that the angle adjusting block 3 retracts inwards to be combined with the first clamping position 101, at this time, the telescopic pins 42 pass through the guide grooves 333 in the corners between the front portion 330 and the inclined portion 331 of the dovetail groove 33 under the action of the pushing force, the telescopic pins 42 at the two ends are in a trend of stretching outwards, so that the reset spring 4 is separated from the front portion 330 of the dovetail groove 33 to keep a state of sliding relatively from the inclined portion 331 to the tail portion 332, an inwards reset elastic force is given to the angle adjusting block 3, the locking portion 31 is tightly attached to the first clamping position 101 to be locked, and the supporting leg 2 is in a gear with the largest angle, as shown in fig. 3. When the gear shifting adjustment is performed again, only the supporting leg 2 needs to be held to rotate clockwise, under the action of the reset elastic force, the supporting leg 2 enables the locking part 31 to jump into the second clamping position 102 from the first clamping position 101 to be combined and automatically locked, as shown in fig. 4, in the same manner, the supporting leg 2 can be continuously rotated to adjust the locking part 31 to be combined and locked with the third clamping position 103, at this time, the angle adjusting block 3 is completely reset, and the telescopic pin 42 falls into the guide groove 333 at the corner of the inclined part 331 and the tail part 332 of the dovetail groove 33, so that the angle adjusting block 3 is prevented from further sliding, as shown in fig. 6 and 7.
When the manual reset locking mode is adopted, the angle adjusting block 3 is also pulled outwards to unlock, then when the angle adjusting block 3 rotates to a proper position, the angle adjusting block 3 is manually pressed, the locking part 31 falls into the clamping position 10, when shifting gears, the angle adjusting block 3 is pulled outwards again, and the steps are repeated.
According to the invention, through the cooperation of the angle adjusting block 3, the reset elastic piece 4 and the structure of the foot joint 20, the locking part 31 can sequentially jump into different clamping positions 10 through rotation to be combined and locked, so that the automatic adjusting and locking of different gears are realized, repeated push-pull is not needed, the operation is very simple and convenient, the speed and the labor are saved, the push-pull times are reduced, and the service life of a product is prolonged; meanwhile, the manual reset locking function is reserved, and the two operation modes can be flexibly selected by a user.
The above-mentioned preferred embodiments should be regarded as illustrative examples of embodiments of the present application, and all such technical deductions, substitutions, improvements and the like which are made on the basis of the embodiments of the present application, are considered to be within the scope of protection of the present patent.
Claims (9)
1. The adjusting and locking mechanism of the tripod comprises an angle clamping structure, a foot joint and an adjusting structure, wherein the angle clamping structure is fixedly arranged on a tripod body and provided with a plurality of clamping positions, the foot joint is arranged on a supporting foot of the tripod and hinged with the angle clamping structure, the adjusting structure is arranged on the foot joint and is combined with the clamping positions to lock the opening angle of the supporting foot; it is characterized in that the method comprises the steps of,
the clamping position consists of a plurality of convex teeth, wherein the convex teeth comprise a driving tooth;
the adjusting structure comprises an angle adjusting block and a reset elastic piece, wherein the angle adjusting block comprises a locking part corresponding to the shape of the clamping position, a raised triggering part and a dovetail groove at the bottom, the locking part is used for being combined and locked with the clamping position, the triggering part is driven by the driving teeth to enable the angle adjusting block to rebound and reset, and the dovetail groove comprises a front part, an inclined part and a tail part;
the two ends of the reset elastic piece are elastically propped against the groove wall of the dovetail groove, the reset elastic piece slides relative to the groove wall of the dovetail groove when the angle adjusting block is moved, the reset elastic piece is positioned at the front part of the dovetail groove and is fixed when the angle adjusting block is in a fully extended state, and when the driving tooth drives the reset elastic piece to reset, the reset elastic piece is separated from the front part of the dovetail groove and keeps a state of relatively sliding from the inclined part to the tail part, so that an inward reset elastic force is given to the angle adjusting block, and the locking part and the clamping position are combined and locked;
the foot joint is provided with a fixing groove for fixing the reset elastic piece.
2. The tripod adjustment locking mechanism of claim 1, wherein said return spring comprises a central housing and telescoping pins at opposite ends of the housing, a spring being disposed in said housing, said spring being connected at opposite ends to said telescoping pins to maintain said telescoping pins in an outwardly sprung condition.
3. An adjustment locking mechanism for a tripod according to claim 1 or claim 2, wherein the junction of the front portion of the dovetail slot with the ramp forms an inwardly narrowing corner, the junction of the ramp with the tail portion forms an outwardly projecting corner, and the slot wall of the dovetail slot is provided with a guide slot extending from the front portion to the tail portion.
4. An adjustment locking mechanism for a tripod according to claim 3, wherein said foot joints are provided with set screws for limiting the angle adjustment block.
5. An adjustment locking mechanism for a tripod according to claim 3, wherein the locking portion is provided with outwardly extending extensions on either side thereof, which are adapted to be pushed against the foot joints when the angle adjustment block is retracted in use.
6. The tripod adjustment locking mechanism of claim 3, wherein said teeth are first teeth, second teeth and drive teeth in a clockwise direction, said first teeth having a first detent on an upper surface thereof, said first teeth and second teeth being second detents, said second teeth and drive teeth being third detents.
7. An adjustment locking mechanism for a tripod according to claim 3, wherein said fixing groove is formed by two bosses.
8. The tripod adjusting and locking mechanism of claim 3, wherein said leg joint and said angle detent structure are provided with shaft holes, said leg joint is hinged to said angle detent structure by a connecting shaft penetrating said shaft holes, and said connecting shaft is fixed by screws screwed into ends of said connecting shaft.
9. The tripod adjustment locking mechanism of claim 8, wherein a spacer is provided between said leg joint shaft aperture and said angle detent structure shaft aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710738499.XA CN107461588B (en) | 2017-08-23 | 2017-08-23 | Tripod adjusting and locking mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710738499.XA CN107461588B (en) | 2017-08-23 | 2017-08-23 | Tripod adjusting and locking mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107461588A CN107461588A (en) | 2017-12-12 |
| CN107461588B true CN107461588B (en) | 2023-04-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710738499.XA Active CN107461588B (en) | 2017-08-23 | 2017-08-23 | Tripod adjusting and locking mechanism |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107461588B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102018104072B4 (en) * | 2018-02-22 | 2023-04-20 | Grammer Aktiengesellschaft | Carrying rod bracket and headrest with carrying rod bracket |
| CN212251923U (en) * | 2020-01-20 | 2020-12-29 | 深圳市全天拍科技有限公司 | Shooting equipment support with auxiliary handle |
| CN114251580B (en) * | 2021-12-28 | 2024-06-28 | 湖南宇元工程检测有限公司 | Fixed tripod of detector convenient to leveling |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08100883A (en) * | 1994-09-30 | 1996-04-16 | Heiwa Seiki Kogyo Kk | Leg opening degree adjusting device for tripod |
| CN201892810U (en) * | 2010-09-05 | 2011-07-06 | 黄忠晓 | Anti-folding mechanism for photographic tripod |
| CN104020630A (en) * | 2014-05-16 | 2014-09-03 | 中山市思锐摄影器材工业有限公司 | Angle adjusting structure for supporting foot rack |
| CN104344171A (en) * | 2014-10-27 | 2015-02-11 | 中山市思锐摄影器材工业有限公司 | Tripod button mechanism |
| CN205579074U (en) * | 2016-04-06 | 2016-09-14 | 中山市徕图摄影器材有限公司 | Tripod with angle modulation function |
| CN205859538U (en) * | 2016-07-01 | 2017-01-04 | 中山市徕图摄影器材有限公司 | A kind of inverse folding tripod button regulation latch-up structure |
| CN207230101U (en) * | 2017-08-23 | 2018-04-13 | 中山市徕图摄影器材有限公司 | A kind of adjusting locking mechanism of tripod |
-
2017
- 2017-08-23 CN CN201710738499.XA patent/CN107461588B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08100883A (en) * | 1994-09-30 | 1996-04-16 | Heiwa Seiki Kogyo Kk | Leg opening degree adjusting device for tripod |
| CN201892810U (en) * | 2010-09-05 | 2011-07-06 | 黄忠晓 | Anti-folding mechanism for photographic tripod |
| CN104020630A (en) * | 2014-05-16 | 2014-09-03 | 中山市思锐摄影器材工业有限公司 | Angle adjusting structure for supporting foot rack |
| CN104344171A (en) * | 2014-10-27 | 2015-02-11 | 中山市思锐摄影器材工业有限公司 | Tripod button mechanism |
| CN205579074U (en) * | 2016-04-06 | 2016-09-14 | 中山市徕图摄影器材有限公司 | Tripod with angle modulation function |
| CN205859538U (en) * | 2016-07-01 | 2017-01-04 | 中山市徕图摄影器材有限公司 | A kind of inverse folding tripod button regulation latch-up structure |
| CN207230101U (en) * | 2017-08-23 | 2018-04-13 | 中山市徕图摄影器材有限公司 | A kind of adjusting locking mechanism of tripod |
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| Publication number | Publication date |
|---|---|
| CN107461588A (en) | 2017-12-12 |
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Address after: 528400 one of the first, second and third floors of building 3, No. 6, Weiye Road, Pingdong village, Sanxiang Town, Zhongshan City, Guangdong Province; Add one business place, specifically: 1. One of building B, No. 1, Yagang street, Yagang village, three townships and towns, Zhongshan City Applicant after: Guangdong laitu Image Technology Co.,Ltd. Address before: 528463 First, Second and Third Floors, No. 6 Weiye Road, Pingdong Village, Three Townships, Zhongshan City, Guangdong Province Applicant before: ZHONGSHAN LAITU PHOTOGRAPHIC EQUIPMENT Co.,Ltd. |
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