CN211554590U - Focusing device, optical system and camera device - Google Patents
Focusing device, optical system and camera device Download PDFInfo
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- CN211554590U CN211554590U CN202020033544.9U CN202020033544U CN211554590U CN 211554590 U CN211554590 U CN 211554590U CN 202020033544 U CN202020033544 U CN 202020033544U CN 211554590 U CN211554590 U CN 211554590U
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Abstract
The utility model discloses a focusing device, optical system and camera device relates to optics technical field. The utility model discloses a: a fixed lens barrel fixedly arranged; the focusing barrel is sleeved on the outer side of the fixed lens barrel, the focusing barrel is rotatably arranged on the fixed lens barrel along the axis direction of the focusing barrel, and a spiral groove is formed in the inner side of the focusing barrel; at least one moving frame is embedded in the focusing cylinder; the movable frame is provided with a mounting groove for mounting the lens, and the movable frame is arranged in the fixed lens barrel in a sliding manner along the axis direction of the fixed lens barrel; the movable frame is also provided with a connecting block; the fixed lens cone is also provided with a connecting groove for the connecting block to pass through, and one end of the connecting block, which is far away from the movable frame, passes through the connecting groove and abuts against the inner wall of the spiral groove; when the focusing barrel rotates along the axis direction of the focusing barrel, the connecting block moves along the extending direction of the connecting groove to drive the movable frame to slide along the axis direction of the fixed lens barrel. The utility model discloses focusing device's focusing precision has been increased.
Description
Technical Field
The utility model relates to the field of optical technology, especially, relate to a focusing device, optical system and camera device.
Background
The zoom lens is a camera lens which can change focal length in a certain range, thereby obtaining different field angles, images with different sizes and different scene ranges. The zoom lens can change a photographing range by varying a focal length without changing a photographing distance, and thus is very advantageous for picture composition.
A focusing device is required to be arranged in the zoom lens to realize the adjustment of the focal length of the lens; the existing lens with internal focusing adopts a thread transmission structure or a cam groove structure with a small rotation angle to realize the linear motion of a focusing lens group.
The thread transmission structure has high requirements on the thread precision of two threaded parts which are matched with each other, and the cost of parts is increased. On the other hand, the structure of the screw transmission causes the whole size of the lens to be enlarged due to the large number of parts, so that the weight of the lens is enlarged, and the large weight causes difficulty in photographing operation.
And the cam groove structure with a small rotation angle has low focusing accuracy in the photographing process due to the fact that the cam groove structure can rotate by a small rotation angle, and user experience is reduced.
Above-mentioned two kinds of structures are touched by external part easily in the use, have caused the skew of transmission structure position then, have reduced focusing device's focusing precision then.
Disclosure of Invention
The utility model discloses to solve current technical problem, provide a focusing device, optical system and camera device, reduced the possibility that external part contacted part in the focusing section of thick bamboo, reduced the possibility of part offset in the focusing section of thick bamboo then, increased focusing device's focusing precision.
The utility model provides a technical scheme as follows:
a focusing apparatus, comprising: a fixed lens barrel fixedly arranged; the focusing barrel is sleeved on the outer side of the fixed lens barrel, the focusing barrel is rotatably arranged on the fixed lens barrel along the axis direction of the focusing barrel, and a spiral groove is formed in the inner side of the focusing barrel; at least one movable frame is embedded in the focusing barrel; the movable frame is provided with a mounting groove for mounting a lens, and is arranged in the fixed lens barrel in a sliding manner along the axis direction of the fixed lens barrel; the movable frame is also provided with a connecting block; the fixed lens barrel is also provided with a connecting groove for the connecting block to pass through, and one end of the connecting block, which is far away from the movable frame, passes through the connecting groove and abuts against the inner wall of the spiral groove; when the focusing barrel rotates along the axis direction of the focusing barrel, the connecting block moves along the extending direction of the connecting groove so as to drive the movable frame to slide along the axis direction of the fixed lens barrel.
In the technical scheme, the movable frame for realizing displacement can be embedded in the focusing barrel, the focusing barrel is cylindrical, and a spiral groove for driving the focusing barrel to rotate is also formed in the inner wall of the focusing barrel, so that the possibility that an external part contacts parts in the focusing barrel is reduced, the possibility of position deviation of the parts in the focusing barrel is reduced, and the focusing precision of the focusing device is improved.
Preferably, the connecting groove is opened in the fixed lens barrel along a direction parallel to an axis of the fixed lens barrel.
In the technical scheme, the possibility of deflection of the movable frame in the moving process is reduced by limiting the opening direction of the connecting groove, so that the possibility of generation of imaging chromatic aberration of the lens is reduced, the possibility of generation of a respiratory effect is also reduced, and the imaging quality of the optical system is improved.
Preferably, the method further comprises the following steps: the limiting shaft is arranged in the fixed lens barrel along the direction parallel to the axis of the fixed lens barrel; the movable frame is arranged on the limiting shaft in a sliding mode along the axis direction of the fixed lens cone, and a limiting hole for the limiting shaft to penetrate through is formed in the movable frame.
Among this technical scheme, through the setting in spacing axle and spacing hole, increased the restraint that removes the frame and receive when removing, reduced the possibility that removes the frame and rock at the removal in-process, increased the stability of removing the frame at the removal in-process.
Preferably, at least two limiting shafts are arranged, and at least one limiting hole is formed; the movable frame is at least provided with a waist-shaped hole for the limiting shaft to pass through, and the waist-shaped hole is formed in the movable frame along the radial direction of the fixed lens cone.
In the technical scheme, the restraint that the movable frame receives in the moving process is further increased through the arrangement of the plurality of limiting shafts, the possibility of shaking the movable frame when the movable frame moves is reduced, and the stability of the movable frame in the moving process is increased.
Preferably, the radius of the kidney-shaped hole is equal to the radius of the limiting shaft.
Among this technical scheme, spacing axle can the butt on the inside in waist type hole, has further increased the restraint that removes the frame and receive at the removal in-process, has reduced the possibility that rocks when removing the frame and remove, has increased the stability of removing the frame at the removal in-process.
Preferably, the fixed lens barrel comprises a fixed barrel and at least one base, the base is arranged at the end part of the fixed barrel, and the base is detachably connected to the fixed barrel; the focusing barrel is sleeved on the outer side of the fixed barrel, and the moving frame is arranged on the inner side of the fixed barrel in a sliding manner; the end part of the limiting shaft is arranged on the base.
In the technical scheme, the detachable arrangement of the fixed lens cone is realized through the arrangement of the base and the fixed cylinder, and the interchangeability and the reliability of the fixed lens cone are increased.
Preferably, one end of the limiting shaft, which is far away from the base, is further provided with a connecting seat, the connecting seat is connected to the base through a connecting baffle plate, and the moving frame is further provided with a through groove for the connecting baffle plate to pass through.
Among this technical scheme, through the setting of connecting seat, increased the restraint between spacing axle and the base, reduced the possibility that spacing axle rocked, then increased the reliability when removing the frame and removing.
Preferably, the number of the connecting blocks on the moving frame is two or three; at most one connecting block is arranged in the spiral groove.
In the technical scheme, the plurality of connecting blocks can increase the stability of the moving block during moving; meanwhile, when the number of the connecting blocks on the moving frame is two, only two spiral grooves can be arranged, and the spiral length of each spiral groove is increased under the same moving distance of the moving frame, so that the focusing precision of the focusing device is improved; when the connecting blocks on the movable frame are three, the three connecting blocks can drive the movable frame to move together, so that the reliability of the movable frame in moving is improved, and the possibility of shaking the movable frame in moving is reduced.
Preferably, the plurality of connecting blocks are uniformly distributed on the moving frame along the axial direction of the fixed lens barrel.
In the technical scheme, the stress distribution of the moving frame in the moving process is improved through the arrangement of the connecting blocks which are uniformly distributed, the possibility of deviation of the moving frame in the moving process is reduced, and the stability of the moving frame in the moving process is improved.
Preferably, when the moving frame is provided in plurality, there is at least one connecting groove to be fitted to one connecting block on each of the moving frames.
In the technical scheme, the shared connecting grooves are arranged, so that the structural strength of the fixed lens barrel is increased, and the utilization efficiency of the connecting grooves is also increased.
Preferably, the width of the spiral groove is the same as the radius of the connecting block.
In the technical scheme, the width of the spiral groove and the radius of the connecting block are limited, the connecting block can be always abutted to the inner walls of two sides of the spiral groove in the rotating process of the focusing barrel, the possibility of return stroke difference is reduced, and the focusing accuracy of the focusing barrel is improved.
Compared with the prior art, the utility model provides a pair of focusing device, optical system and camera device have following beneficial effect:
1. the movable frame for realizing displacement can be embedded in the focusing barrel, the focusing barrel is cylindrical, and a spiral groove for driving the focusing barrel to rotate is also formed in the inner wall of the focusing barrel, so that the possibility that an external part contacts parts in the focusing barrel is reduced, the possibility of position deviation of the parts in the focusing barrel is reduced, and the focusing precision of the focusing device is improved.
2. Through the setting of spacing axle and spacing hole, increased the restraint that removes the frame and receive when removing, reduced the possibility that removes the frame and rock at the removal in-process, increased the stability of removing the frame at the removal in-process.
3. Through the setting of connecting seat, increased the restraint between spacing axle and the base, reduced the possibility that spacing axle rocked, increased the reliability when removing the frame and removing then.
Drawings
The above features, technical features, advantages and implementations of a focusing apparatus, an optical system and an image pickup apparatus will be further described in the following description of preferred embodiments in a clearly understandable manner with reference to the accompanying drawings.
Fig. 1 is a schematic structural diagram of a focusing apparatus of the present invention;
FIG. 2 is a cross-sectional view of a focusing apparatus of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
FIG. 4 is a schematic view of an internal structure of a focusing apparatus of the present invention;
FIG. 5 is a schematic structural view of an inner barrel of a focusing apparatus according to the present invention;
fig. 6 is a schematic structural diagram of a fixing cylinder in the focusing apparatus of the present invention.
The reference numbers illustrate: 10. fixing the lens barrel; 11. connecting grooves; 12. a fixed cylinder; 13. a base; 14. a connecting seat; 15. connecting a baffle plate; 20. a focusing barrel; 21. a helical groove; 22. an outer cylinder; 221. a focusing rack; 222. focusing scales; 23. an inner barrel; 30. moving the frame; 301. a limiting hole; 302. a kidney-shaped hole; 303. passing through the slot; 31. mounting grooves; 32. connecting blocks; 40. a limiting shaft; 41. and a shaft sleeve.
Detailed Description
In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.
For the sake of simplicity, only the parts related to the utility model are schematically shown in the drawings, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically illustrated or only labeled. In this document, "one" means not only "only one" but also a case of "more than one".
The first embodiment is as follows: as shown in fig. 1 to 4, a focusing apparatus includes:
the fixed lens barrel 10 is fixedly arranged, specifically, the fixed lens barrel 10 is a hollow cylindrical structure, and the fixed lens barrel 10 can be arranged in the zoom lens or the optical system.
As shown in fig. 2 and 3, the focusing barrel 20 is a hollow cylindrical structure, the focusing barrel 20 can be sleeved outside the fixed lens barrel 10, the focusing barrel 20 can be rotatably arranged on the fixed lens barrel 10 along its own axis direction, that is, the focusing barrel 20 can rotate left and right on the fixed lens barrel 10; the inner side of the focusing barrel 20 is provided with a spiral groove 21, and the spiral groove 21 is spirally formed on the inner wall of the focusing barrel 20; at least one moving frame 30 is embedded in the focusing barrel 20.
The movable frame 30 is provided with an installation groove 31 for installing a lens (not shown in the figure), and specifically, the lens can be coaxially installed in the installation groove 31 on the movable frame 30; the movable frame 30 is slidably disposed in the fixed lens barrel 10 along the axial direction of the fixed lens barrel 10, and the lens mounted on the movable frame 30 can move along with the movable frame 30; the movable frame 30 is also provided with a connecting block 32.
The fixed lens barrel 10 is further provided with a connecting groove 11 for the connecting block 32 to pass through, one end of the connecting block 32, which is far away from the moving frame 30, passes through the connecting groove 11 and abuts against the inner wall of the spiral groove 21, that is, the outer end of the connecting block 32 can abut against the inner wall of the spiral groove 21 and move in the spiral groove 21; preferably, the connecting block 32 is selected as a bolt, and the connecting block 32 can be screwed on the moving frame 30, so that the connecting block 32 can be detachably connected with the moving frame 30, and the interchangeability of the connecting block 32 is increased.
When the focusing barrel 20 rotates in its own axial direction, the connecting block 32 moves in the extending direction of the connecting groove 11 to slide the moving frame 30 in the axial direction of the fixed barrel 10.
Specifically, when the user directly rotates the focusing barrel 20 or rotates the focusing barrel 20 through an external adjusting component (not shown in the figure), the focusing barrel 20 can drive the connecting block 32 to rotate in the same direction, but because the connecting groove 11 is limited to the connecting block 32, the connecting block 32 can only slide along the extending direction of the connecting groove 11, and because the connecting block 32 is embedded in the spiral groove 21, the focusing barrel 20 is in the rotating process, the position of the connecting block 32 abutting on the spiral groove 21 is continuously changed, the focusing barrel 20 can drive the connecting block 32 to slide along the extending direction of the connecting groove 11, then the extending direction of the moving frame 30 along the connecting groove 11 is driven to slide, the change of the lens position is realized, and the focusing function is realized.
In this embodiment, the moving frame 30 can be embedded in the focusing barrel 20, the focusing barrel 20 is cylindrical, and the spiral groove 21 for driving the focusing barrel 20 to rotate is also formed in the inner wall of the focusing barrel 20, so that the possibility that an external component contacts a part in the focusing barrel 20 is reduced, the possibility of position deviation of the part in the focusing barrel 20 is reduced, and the focusing accuracy of the focusing device is improved.
Preferably, as shown in fig. 4, the connection groove 11 is opened in the fixed barrel 10 in a direction parallel to the axial direction of the fixed barrel 10; in this embodiment, the opening direction of the connecting slot 11 is limited, so that the possibility of deflection of the moving frame 30 in the moving process is reduced, the possibility of generation of imaging chromatic aberration of the lens is reduced, the possibility of generation of a respiratory effect is also reduced, and the imaging quality of the optical system is improved.
According to the modification of the above embodiment, as shown in fig. 3, in the present embodiment, the width of the spiral groove 21 is the same as the radius of the joint block 32; through the limitation of the width of the spiral groove 21 and the radius of the connecting block 32, the connecting block 32 can always abut against the inner walls of two sides of the spiral groove 21 in the rotation process of the focusing barrel 20, the possibility of return stroke difference is reduced, and the focusing accuracy of the focusing barrel 20 is improved.
According to a modification of the above embodiment, as shown in fig. 4, in the present embodiment, when the moving frame 30 is provided in plurality, at least one connecting groove 11 is present to fit with one connecting block 32 on each moving frame 30; specifically, in the present embodiment, the connection blocks 32 are located on the front sides of the moving frames 30 at the upper and lower ends, and the two connection blocks 32 are located in the same connection groove 11.
In this embodiment, the connecting groove 11 is vertically formed on the fixed barrel 10, the connecting blocks 32 located on the same straight line exist on the plurality of moving frames 30, and the connecting blocks 32 can be located in the same connecting groove 11, that is, the connecting blocks 32 on the plurality of moving frames 30 can share the same connecting groove 11.
In this embodiment, by providing the common connecting groove 11, the structural strength of the fixed barrel 10 is increased, and the utilization efficiency of the connecting groove 11 is also increased.
Specifically, as shown in fig. 1 and 3, the focusing barrel 20 includes an outer barrel 22 and an inner barrel 23, the outer barrel 22 can be sleeved on the outer wall of the inner barrel 23, and the outer barrel 22 and the inner barrel 23 can be detachably connected by screws or bolts; the spiral groove 21 can be opened on the inner cylinder 23; the outer cylinder 22 is provided with a focusing scale 222, so that manual focusing by a user is facilitated; the outer cylinder 22 is further provided with a focusing rack 221, an external adjusting component can be meshed with the adjusting rack, and the focusing cylinder 20 can be driven to rotate accurately by accurate rotation of the adjusting component.
Example two: as shown in fig. 4, the present embodiment differs from the first embodiment in the addition of a limit shaft 40.
On the basis of the first embodiment, in this embodiment, the focusing apparatus further includes: and the limiting shaft 40, the limiting shaft 40 is arranged in the fixed lens barrel 10 along the direction parallel to the axis of the fixed lens barrel 10.
The movable frame 30 is slidably disposed on the limiting shaft 40 along the axial direction of the fixed lens barrel 10, and the movable frame 30 is provided with a limiting hole 301 for the limiting shaft 40 to pass through.
In this embodiment, through the arrangement of the limiting shaft 40 and the limiting hole 301, the restriction of the moving frame 30 during moving is increased, the possibility of shaking of the moving frame 30 during moving is reduced, and the stability of the moving frame 30 during moving is increased.
Specifically, the moving frame 30 can be slidably disposed on the limit shaft 40 through a linear bearing or a shaft sleeve 41.
Preferably, at least two limiting shafts 40 are provided, and the plurality of limiting shafts 40 can be uniformly distributed on the fixed lens barrel 10 along the axial direction of the fixed lens barrel 10; at least one limiting hole 301 is formed, and preferably, only one limiting hole 301 is formed.
The movable frame 30 is provided with at least one waist-shaped hole 302 for the limiting shaft 40 to pass through, and the waist-shaped hole 302 is arranged on the movable frame 30 along the radial direction of the fixed lens barrel 10.
In this embodiment, through the arrangement of the plurality of limiting shafts 40, the restriction of the moving frame 30 in the moving process is further increased, the possibility of shaking the moving frame 30 during moving is reduced, and the stability of the moving frame 30 in the moving process is increased.
Meanwhile, the waist-shaped hole 302 is arranged to conveniently sleeve the movable frame 30 on the plurality of limiting shafts 40, so that the possibility of bending the plurality of limiting shafts 40 is reduced, and the reliability of the movable frame 30 during movement is improved.
Preferably, the radius of the kidney-shaped hole 302 is equal to the radius of the restraining shaft 40; in this embodiment, the limiting shaft 40 can abut against the inner wall of the waist-shaped hole 302, so that the restriction of the moving frame 30 in the moving process is further increased, the possibility of shaking the moving frame 30 during moving is reduced, and the stability of the moving frame 30 in the moving process is increased.
Example three: as shown in fig. 4, a focusing apparatus according to the present embodiment is different from the second embodiment in a specific structure of a fixed barrel 10.
On the basis of the second embodiment, in the present embodiment, the fixed lens barrel 10 includes a fixed barrel 12 and at least one base 13, the base 13 is disposed at an end of the fixed barrel 12, and the base 13 is detachably connected to the fixed barrel 12; specifically, the base 13 can be detachably connected to the fixed cylinder 12 by bolts.
The focusing barrel 20 is sleeved outside the fixed barrel 12, and the moving frame 30 is slidably arranged inside the fixed barrel 12; the end of the stopper shaft 40 is disposed on the base 13.
Specifically, in the present embodiment, one base 13 is provided, the base 13 is provided at the end portion on the left side of the fixed cylinder 12, and the left end of the limiting shaft 40 can be fixedly provided on the base 13 on the left side; more specifically, the base 13 can be attached to the fixed cylinder 12 by screws.
In this embodiment, the base 13 and the fixed barrel 12 are arranged, so that the fixed barrel 10 can be detachably arranged, and the interchangeability and reliability of the fixed barrel 10 are improved.
Preferably, a connecting seat 14 is further provided at one end of the limiting shaft 40 away from the base 13, the connecting seat 14 is connected to the base 13 through a connecting baffle 15, and a through groove 303 for the connecting baffle 15 to pass through is further provided on the moving frame 30; specifically, connecting seat 14 is a hollow ring shape, and connecting seat 14 can be embedded inside fixed cylinder 12.
In this embodiment, through the setting of connecting seat 14, increased the restraint between spacing axle 40 and the base 13, reduced the possibility that spacing axle 40 rocked, then increased the reliability when removing frame 30 and removing.
According to the improvement of the above embodiment, in the present embodiment, two bases 13 can be provided, and the two bases 13 can be provided at the left and right ends of the fixed cylinder 12, respectively, so that the stopper shaft 40 can be detachably connected to the bases 13 at the left and right ends, and the interchangeability of the bases 13 and the stopper shaft 40 is further increased.
Example four: as shown in fig. 2 and 4, the present embodiment differs from the first embodiment in the specific number of the connecting blocks 32.
On the basis of the first embodiment, in the present embodiment, two or three connection blocks 32 are provided on the moving frame 30; there is at most one connecting piece 32 in the helical groove 21.
In this embodiment, the plurality of connecting blocks 32 can increase the stability of the moving block when the moving block moves; meanwhile, when the number of the connecting blocks 32 on the moving frame 30 is two, only two spiral grooves 21 can be provided, and the spiral length of the spiral groove 21 is increased under the same moving distance of the moving frame 30, so that the focusing precision of the focusing device is increased; when the number of the connecting blocks 32 on the moving frame 30 is three, the three connecting blocks 32 can drive the moving frame 30 to move together, so that the reliability of the moving frame 30 during moving is increased, and the possibility of shaking of the moving frame 30 during moving is reduced.
Preferably, the plurality of connection blocks 32 are uniformly distributed on the moving frame 30 in the axial direction of the fixed barrel 10. In this embodiment, through the arrangement of the connection blocks 32 which are uniformly distributed, the stress distribution of the moving frame 30 in the moving process is improved, the possibility of the moving frame 30 shifting in the moving process is reduced, and the stability of the moving frame 30 in the moving process is increased.
Example five: as shown in fig. 2, the present embodiment differs from the first embodiment in the specific number of moving frames 30.
In addition to the first embodiment, in the present embodiment, two moving frames 30 are provided, and the two moving frames 30 can be provided at the upper and lower ends of the focus tube 20, respectively.
In the focusing apparatus described in connection with the second and fourth embodiments, when the moving frame 30 is fitted to the stopper rod 40, only two connecting blocks 32 are required on the moving frame 30, and when the moving frame 30 is not fitted to the stopper rod 40, three connecting blocks 32 are required on the moving frame 30.
In this embodiment, the moving frame 30 at the left end is adapted to the limiting rod 40, two connecting blocks 32 are arranged on the moving frame 30, and the two connecting blocks 32 are symmetrically distributed on the moving frame 30 along the axis of the moving block 30; the right moving frame 30 is not adapted to the limiting rod 40, so that three connecting blocks 32 are required to be arranged on the right moving frame 30.
Referring to fig. 5, the inner cylinder 23 is provided with spiral grooves 21 corresponding to the number of the connecting blocks 32 on the moving frame 30; as shown in fig. 6, since one connecting block 32 on the moving frames 30 at the left and right ends can share one connecting groove 11, the fixed cylinder 12 only needs to be provided with four connecting grooves 11 to meet the sliding requirement of the connecting blocks 32 on the two moving frames 30.
According to the improvement of the above embodiment, in this embodiment, the two movable frames 30 can also be disposed in the fixed lens barrel including the two bases 13, and therefore, the two movable frames 30 can be adapted to the limiting shaft 40 at the same time, and therefore, the two movable frames 30 can be provided with only two connecting blocks 32, and the fixed barrel 12 can satisfy the sliding requirement of the connecting blocks 32 on the two movable frames 30 only by providing two connecting grooves 11.
Example six: an optical system comprising a focusing apparatus as described in any one of the above embodiments.
Example seven: an image pickup apparatus including an optical system as described in embodiment six.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (13)
1. A focusing apparatus, comprising:
a fixed lens barrel fixedly arranged;
the focusing barrel is sleeved on the outer side of the fixed lens barrel, the focusing barrel is rotatably arranged on the fixed lens barrel along the axis direction of the focusing barrel, and a spiral groove is formed in the inner side of the focusing barrel; at least one movable frame is embedded in the focusing barrel;
the movable frame is provided with a mounting groove for mounting a lens, and is arranged in the fixed lens barrel in a sliding manner along the axis direction of the fixed lens barrel; the movable frame is also provided with a connecting block;
the fixed lens barrel is also provided with a connecting groove for the connecting block to pass through, and one end of the connecting block, which is far away from the movable frame, passes through the connecting groove and abuts against the inner wall of the spiral groove;
when the focusing barrel rotates along the axis direction of the focusing barrel, the connecting block moves along the extending direction of the connecting groove so as to drive the movable frame to slide along the axis direction of the fixed lens barrel.
2. A focusing apparatus according to claim 1, wherein:
the connecting groove is arranged on the fixed lens cone along the direction parallel to the axis of the fixed lens cone.
3. The focusing apparatus of claim 1, further comprising:
the limiting shaft is arranged in the fixed lens barrel along the direction parallel to the axis of the fixed lens barrel;
the movable frame is arranged on the limiting shaft in a sliding mode along the axis direction of the fixed lens cone, and a limiting hole for the limiting shaft to penetrate through is formed in the movable frame.
4. A focusing apparatus according to claim 3, wherein:
the number of the limiting shafts is at least two, and at least one limiting hole is formed;
the movable frame is at least provided with a waist-shaped hole for the limiting shaft to pass through, and the waist-shaped hole is formed in the movable frame along the radial direction of the fixed lens cone.
5. The focusing apparatus of claim 4, wherein:
the radius of the waist-shaped hole is equal to that of the limiting shaft.
6. A focusing apparatus according to claim 3, wherein:
the fixed lens barrel comprises a fixed barrel and at least one base, the base is arranged at the end part of the fixed barrel, and the base is detachably connected with the fixed barrel;
the focusing barrel is sleeved on the outer side of the fixed barrel, and the moving frame is arranged on the inner side of the fixed barrel in a sliding manner;
the end part of the limiting shaft is arranged on the base.
7. The focusing apparatus of claim 6, wherein:
the limiting shaft is connected with the base through a connecting baffle plate, and the moving frame is further provided with a through groove for the connecting baffle plate to pass through.
8. A focusing apparatus according to claim 1, wherein:
the number of the connecting blocks on the moving frame is two or three;
at most one connecting block is arranged in the spiral groove.
9. A focusing apparatus according to claim 8, wherein:
the connecting blocks are uniformly distributed on the movable frame along the axial direction of the fixed lens barrel.
10. A focusing device according to any of claims 1 to 9, characterized in that:
when the movable frame is provided in plurality, at least one connecting groove is matched with one connecting block on each movable frame.
11. A focusing device according to any of claims 1 to 9, characterized in that:
the width of the spiral groove is the same as the radius of the connecting block.
12. An optical system, characterized by:
the optical system comprising a focusing apparatus according to any of claims 1 to 11.
13. An image pickup apparatus characterized in that:
the image pickup apparatus comprising an optical system according to claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020033544.9U CN211554590U (en) | 2020-01-08 | 2020-01-08 | Focusing device, optical system and camera device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020033544.9U CN211554590U (en) | 2020-01-08 | 2020-01-08 | Focusing device, optical system and camera device |
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| Publication Number | Publication Date |
|---|---|
| CN211554590U true CN211554590U (en) | 2020-09-22 |
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| CN202020033544.9U Active CN211554590U (en) | 2020-01-08 | 2020-01-08 | Focusing device, optical system and camera device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022126868A1 (en) * | 2020-12-16 | 2022-06-23 | 广景视睿科技（深圳）有限公司 | Lens focusing assembly and projector |
| CN114967296A (en) * | 2022-04-22 | 2022-08-30 | 青岛虚拟现实研究院有限公司 | Projection lens, projection ray apparatus and virtual reality equipment |
-
2020
- 2020-01-08 CN CN202020033544.9U patent/CN211554590U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022126868A1 (en) * | 2020-12-16 | 2022-06-23 | 广景视睿科技（深圳）有限公司 | Lens focusing assembly and projector |
| CN114967296A (en) * | 2022-04-22 | 2022-08-30 | 青岛虚拟现实研究院有限公司 | Projection lens, projection ray apparatus and virtual reality equipment |
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