CN219122486U - Axial parallelism holding device for zoom lens - Google Patents
Axial parallelism holding device for zoom lens Download PDFInfo
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- CN219122486U CN219122486U CN202222704917.2U CN202222704917U CN219122486U CN 219122486 U CN219122486 U CN 219122486U CN 202222704917 U CN202222704917 U CN 202222704917U CN 219122486 U CN219122486 U CN 219122486U
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Abstract
The utility model provides an axial parallel holding device for a zoom lens, which comprises a straight barrel, a movable barrel and at least one axial parallel holding assembly, wherein the straight barrel forms a first accommodating cavity, the movable barrel forms a second accommodating cavity, the axial parallel holding assembly comprises an elastic element, the movable barrel is horizontally movably arranged in the first accommodating cavity of the straight barrel, the elastic element is arranged between the movable barrel and the straight barrel, and the elastic element is arranged to be capable of being pressed against the inner wall of the straight barrel.
Description
Technical Field
The present utility model relates to a zoom lens, and more particularly, to a zoom lens capable of ensuring that optical axes of a movable lens group and a fixed lens group are always kept parallel during focusing. The utility model further relates to an axial parallelism maintaining apparatus for a zoom lens.
Background
Zoom (or adjustable focus) lenses are increasingly being used because of their unique advantages. In general, a zoom lens includes a fixed lens group whose position is fixed and a movable lens group whose position is adjustable so that the focal length of the entire optical lens can be adjusted. Therefore, in the conventional zoom lens, focusing is mostly achieved by adjusting the relative position of the movable lens group with respect to the fixed lens. However, there is often a gap between the movable lens group and the lens barrel for positioning the fixed lens group, and when the movable lens group is moved, parallelism of the optical axis of the movable lens group and the optical axis of the fixed lens group is broken, and even movement of the movable lens group relative to the fixed lens group is affected.
The chinese patent application No. CN201911303073.7 discloses a method for aligning the optical axis of the rear fixed group of a zoom lens, which comprises assembling the entire rear fixed lens group 4 in a straight tube 5 through a first pressing ring 6, fixedly connecting the front fixed lens group 1 to the straight tube 5 through a second pressing ring 7, and keeping the rear fixed lens group 4 assembled in the straight tube 5 through the actions of the first pressing ring 6 and the second pressing ring 7, so that the optical axis of the rear fixed lens group 4 is parallel to the optical axis of the front fixed lens group 1. The zoom imaging lens disclosed in this patent has a number of problems: first, the first clamping ring 6 is sleeved on the rear fixed lens group 4, and the friction force between the first clamping ring and the rear fixed lens group is large. Secondly, the first clamping ring 6 realizes the positioning of the rear fixed lens group 4 through the deformation of the self material, once the first clamping ring 6 is worn or loses elasticity, gaps are easily formed between the first clamping ring 6 and the straight barrel lens tube 5 and between the first clamping ring 6 and the rear fixed lens group 4, and the positioning function is lost.
Disclosure of Invention
The main advantage of the present utility model is to provide an axial parallelism maintaining apparatus for a zoom lens, which can maintain the optical axis of a movable lens group and the optical axis of a fixed lens group always parallel.
Another advantage of the present utility model is to provide an axial parallelism maintaining apparatus for a zoom lens that maintains a small contact surface between two relatively moving members when an optical axis of a movable lens group and an optical axis of a fixed lens group of the zoom lens are parallel to each other, so as to reduce friction between the relatively moving members and ensure smoother relative movement between the relatively moving members.
Another advantage of the present utility model is to provide an axial parallelism maintaining apparatus for a zoom lens that maintains a direction of force applied to a movable lens group while maintaining parallelism of an optical axis of the movable lens group and an optical axis of a fixed lens group of the zoom lens, so as to maintain that the optical axis of the movable lens group is always parallel to the optical axis of the fixed lens group.
Another advantage of the present utility model is to provide a zoom lens that can keep the optical axis of a movable lens group and the optical axis of a fixed lens group parallel, and that has a long lifetime.
Other advantages and features of the present utility model will become apparent from the following detailed description.
Accordingly, according to an embodiment of the present utility model, the axial-direction parallel-keeping apparatus for a zoom lens of the present utility model having the above-described advantages includes:
straight barrel type lens barrel;
a movable cylinder; and
at least one axial parallel holding assembly, wherein the straight barrel forms a first accommodation chamber, the movable barrel forms a second accommodation chamber, the axial parallel holding assembly comprises an elastic element, wherein the movable barrel is horizontally movably arranged in the first accommodation chamber of the straight barrel, wherein the elastic element is arranged between the movable barrel and the straight barrel, and the elastic element is arranged to be capable of being pressed against the inner wall of the straight barrel.
Further, the elastic element comprises at least one positioning element and at least one elastic element, wherein the elastic element is arranged between the positioning element and the movable cylinder, and the elastic element is arranged in a proper elastic deformation state.
Further, the movable cylinder further forms at least one positioning cavity, wherein the elastic member is disposed within the positioning cavity, and the positioning member is disposed to at least partially protrude from the positioning cavity.
Further, the movable cylinder is cylindrical, and the shape and size of the movable cylinder are set to fit the first accommodation chamber of the straight cylinder barrel.
Further, the axial parallel holding assembly further comprises at least one driving member, the straight barrel forms at least one sliding groove, one end of the driving member is fixed on the movable barrel, and the other end of the driving member penetrates out of the sliding groove of the straight barrel, wherein the extending direction of the sliding groove is the same as the extending direction of the straight barrel.
According to an embodiment of the present utility model, there is further provided another axial parallelism maintaining apparatus for a zoom lens, including:
straight barrel type lens barrel;
a movable cylinder; and
at least one axial parallel holding assembly, wherein the straight barrel forms a first accommodation chamber, the movable barrel forms a second accommodation chamber, the axial parallel holding assembly comprises an elastic element and a fixing piece, wherein the movable barrel is horizontally movably arranged in the first accommodation chamber of the straight barrel, the fixing piece of the axial parallel holding assembly is fixedly arranged on the movable barrel, the elastic element is arranged between the fixing piece and the straight barrel, and the elastic element is arranged to be capable of being pressed against the inner wall of the straight barrel.
Further, the elastic element comprises at least one positioning member and at least one elastic member, wherein the elastic member is arranged between the positioning member and the fixing member, and the elastic member is arranged in a proper elastic deformation state.
Further, the securing member forms a positioning cavity, wherein the resilient member is disposed within the positioning cavity and the positioning member is disposed to at least partially protrude from the positioning cavity.
Further, the movable cylinder is cylindrical, and the shape and size of the movable cylinder are set to fit the first accommodation chamber of the straight cylinder barrel.
Further, the axial parallel holding assembly further comprises at least one driving member, the straight barrel forms at least one sliding groove, one end of the driving member is fixed on the movable barrel, and the other end of the driving member penetrates out of the sliding groove of the straight barrel, wherein the extending direction of the sliding groove is the same as the extending direction of the straight barrel.
The foregoing and other advantages of the utility model will become more fully apparent from the following description and appended drawings.
The above and other advantages and features of the present utility model are readily apparent from the following detailed description of the utility model and the accompanying drawings.
Drawings
Fig. 1 is a perspective view of a zoom lens according to an embodiment of the present utility model, wherein the zoom lens is horizontally placed.
Fig. 2 is a cross-sectional view of the zoom lens according to the embodiment of the present utility model.
Fig. 3 is another cross-sectional view of the zoom lens according to the embodiment of the present utility model.
Fig. 4 is a perspective view of the straight barrel of the zoom lens according to the embodiment of the present utility model.
Fig. 5 is a perspective view of the movable barrel of the zoom lens according to the embodiment of the present utility model.
Fig. 6A shows an alternative implementation of the zoom lens according to the embodiment of the present utility model.
Fig. 6B is a cross-sectional view of an alternative implementation of the zoom lens according to the embodiment of the present utility model described above.
Fig. 6C is an enlarged view of the axial parallelism maintaining assembly of the zoom lens according to the embodiment of the utility model described above, shown in fig. 6A and 6B.
Fig. 6D is a cross-sectional view of an axial parallelism maintaining assembly of the zoom lens according to the embodiment of the present utility model shown in fig. 6A and 6B, which is an alternative implementation of the zoom lens described above.
Detailed Description
The following description is presented to enable one of ordinary skill in the art to practice the utility model. Other obvious substitutions, modifications and changes will occur to one of ordinary skill in the art. Thus, the scope of the utility model should not be limited by the exemplary embodiments described herein.
It will be understood by those of ordinary skill in the art that the terms "a" or "an" should be understood as "at least one" or "one or more" unless specifically indicated herein, i.e., in one embodiment, the number of elements may be one, and in other embodiments, the number of elements may be multiple.
It will be appreciated by those of ordinary skill in the art that unless specifically indicated herein, the terms "longitudinal," "transverse," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc., refer to an orientation or position based on that shown in the drawings, merely for convenience of description of the present utility model, and do not denote or imply that the devices or elements involved must have a particular orientation or position. Accordingly, the above terms should not be construed as limiting the present utility model.
Referring to fig. 1 to 5 of the drawings of the specification, a zoom lens according to an embodiment of the present utility model is illustrated, which comprises a straight barrel 10, a movable barrel 20, a fixed lens group 30, a movable lens group 40, and at least one axial parallel holding assembly 50, wherein the straight barrel 10 forms a first accommodation chamber 100, the movable barrel 20 forms a second accommodation chamber 200, the fixed lens group 30 comprises at least one fixed lens 31, the movable lens group 40 comprises at least one movable lens 41, the axial parallel holding assembly 50 comprises an elastic element 51, wherein the fixed lens 30 is fixedly disposed in the straight barrel 10, the movable lens 40 is horizontally movably disposed in the first accommodation chamber 100 of the straight barrel 10, wherein the elastic element 51 is disposed between the movable barrel 20 and the straight barrel 10, and the elastic element 51 is disposed to be capable of pressing against an inner wall 11 of the straight barrel 10. Accordingly, since the elastic member 51 is pressed against the inner wall 11 of the straight barrel tube 10, the elastic member 51 applies an opposite force to the axial direction parallel maintaining assembly 50 to maintain the movable barrel 20 in place. Preferably, the movable cylinder 20 is cylindrical, and the shape and size of the movable cylinder 20 are set to fit (with a slight gap between) the first accommodation chamber 100 of the straight cylinder barrel 10. More preferably, the movable cylinder 20 has a cylindrical shape. Preferably, the movable cylinder 20 and the fixed lens 31 of the fixed lens group 30 are disposed in the first accommodation chamber 100 of the straight barrel 10 at a distance.
As shown in fig. 1 to 5 of the drawings, the elastic element 51 of the axial parallel-keeping assembly 50 of the zoom lens according to the embodiment of the present utility model includes a positioning element 511 and an elastic element 512, wherein the elastic element 512 is disposed between the positioning element 511 and the movable cylinder 20, and the elastic element 512 is in a proper elastic deformation state (for example, when the elastic element 51 is a spring, it is in a compressed state) so that the positioning element 511 can be pressed against the inner wall 11 of the straight cylinder barrel 10. Accordingly, the axial parallelism maintaining assembly 50 applies a force in a preset direction to the movable cylinder 20, which can maintain the movable cylinder 20 in place and ensure parallelism of the optical axis of the fixed lens group 30 and the optical axis of the movable lens group 40 of the zoom lens of the present utility model. Preferably, the elastic member 512 is a spring and is in a compressed state. Accordingly, the positioning member 511 is pressed against the inner wall of the straight barrel 10 by the elastic member 512.
As shown in fig. 1 to 5 of the drawings, the movable barrel 20 of the zoom lens according to the embodiment of the present utility model further forms at least one positioning cavity 520, wherein the elastic member 512 is disposed in the positioning cavity 520, and one end of the elastic member 512 is physically connected to the positioning member 511, and the positioning member 511 is disposed to at least partially protrude from the positioning cavity 520. Accordingly, the elastic member 512 is disposed in the positioning chamber 520 and compressed (pressed) to keep the positioning member 511 pressed against the inner wall 11 of the straight barrel 10.
As shown in fig. 1 to 5 of the drawings, the positioning cavity 520 of the movable barrel 20 of the zoom lens according to the embodiment of the utility model is cylindrical, the positioning member 511 is spherical, and the elastic member 512 is disposed in the positioning cavity 520 and between the positioning member 511 and the movable barrel 20, so that the positioning member 511 can be pressed against the inner wall 11 of the straight barrel 10 while minimizing the influence of the positioning member 511 on the movement of the movable barrel 20 relative to the straight barrel 10.
As shown in fig. 1 to 5 of the drawings, the axial parallel holding assembly 50 of the zoom lens according to the embodiment of the present utility model further includes at least one driving member 53, the straight barrel 10 forms a sliding groove 101, wherein one end of the driving member 53 is fixed on the movable barrel 20, and the other end passes out of the sliding groove 101 of the straight barrel 10, wherein the extending direction of the sliding groove 101 is parallel to the optical axis of the movable lens group 40 (or the same as the extending direction of the straight barrel 10), so that a user can drive the movable lens group 40 to move by the driving member 53, and the moving direction thereof is the same as the extending direction of the sliding groove 101.
As shown in fig. 1 to 5 of the drawings, the zoom lens according to the embodiment of the present utility model includes a set of axial parallel holding members 50, wherein the movable cylinder 20 forms a set of positioning cavities 520, wherein the positioning cavities 520 of the movable cylinder 20 are formed at the movable cylinder 20 at intervals, and the extending direction of the positioning cavities 520 is perpendicular to the moving direction of the movable cylinder 20, so that the direction of the elastic member 51 of the axial parallel holding members 50 applied to the movable cylinder 20 is perpendicular to the moving direction of the movable cylinder 20, thereby enhancing the positioning of the movable cylinder 20 and preventing the movable cylinder 20 from tilting when moving relative to the straight cylinder 10.
As shown in fig. 1 to 5 of the drawings, the zoom lens according to the embodiment of the present utility model includes at least two pairs of axial parallel holding members 50, wherein the movable cylinder 20 forms two pairs of positioning cavities 520, wherein the positioning cavities 520 of the movable cylinder 20 are formed at the movable cylinder 20 at intervals, and the extending direction of the positioning cavities 520 is perpendicular to the moving direction of the movable cylinder 20, so that the direction of the elastic member 51 of the axial parallel holding member 50 applied to the movable cylinder 20 is perpendicular to the moving direction of the movable cylinder 20, thereby enhancing the positioning of the movable cylinder 20 and preventing the movable cylinder 20 from tilting when moving relative to the straight cylinder 10.
Therefore, the axial parallelism maintaining assembly 50 of the zoom lens of the present utility model maintains the relative position between the two by applying a perpendicular to the optical axis thereof (the optical axis of the movable lens group 40) on the movable cylinder 20, thereby reducing the requirement for clearance fit between the straight cylinder barrel 10 and the movable cylinder 20, and better ensuring the axial parallelism of the fixed lens group 30 and the movable lens group 40 of the zoom lens of the present utility model.
As shown in fig. 1 to 5 of the drawings, according to an embodiment of the present utility model, the present utility model further provides an axial parallelism maintaining apparatus for a zoom lens, comprising a straight barrel 10, a movable barrel 20 and at least one axial parallelism maintaining assembly 50, wherein the straight barrel 10 forms a first accommodation chamber 100, the movable barrel 20 forms a second accommodation chamber 200, the axial parallelism maintaining assembly 50 comprises an elastic member 51, wherein the movable barrel 20 is horizontally movably disposed within the first accommodation chamber 100 of the straight barrel 10, the elastic member 51 of the axial parallelism maintaining assembly 50 is disposed between the movable barrel 20 and the straight barrel 10, and the elastic member 51 is disposed to be capable of pressing against an inner wall of the straight barrel 10.
Fig. 6A to 6D of the drawings of the specification show an alternative implementation of a zoom lens according to an embodiment of the present utility model, which comprises a straight barrel 10, a movable barrel 20A, a fixed lens group 30, a movable lens group 40 and at least one axial parallel holding assembly 50A, wherein the straight barrel 10 forms a first accommodation chamber 100, the movable barrel 20A forms a second accommodation chamber 200A, the fixed lens group 30 comprises at least one fixed lens 31, the movable lens group 40 comprises at least one movable lens 41, the axial parallel holding assembly 50A comprises an elastic member 51A and a fixing member 52A, wherein the fixed lens 30 is fixedly disposed in the straight barrel 10, the movable lens 40 is disposed in the second accommodation chamber 200A of the movable barrel 20A, the movable barrel 20A is horizontally movably disposed in the first accommodation chamber 100 of the straight barrel 10, the fixing member 52A of the axial parallel holding assembly 50A is disposed in the elastic member 51A between the fixed barrel 20A and the elastic member 51A, and the fixed barrel member 52A is capable of being disposed between the elastic member 51A and the fixed barrel 10. Accordingly, since the elastic member 51A is pressed against the inner wall 11 of the straight barrel tube 10, the fixing piece 52A of the axial parallelism maintaining assembly 50A is applied with a reverse force to hold the movable barrel 20A in place. Preferably, the movable cylinder 20A is cylindrical, and the shape and size of the movable cylinder 20A are set to fit (with a slight gap between) the first accommodation chamber 100 of the straight barrel lens 10. Preferably, the movable cylinder 20A and the fixed lens 31 of the fixed lens group 30 are disposed in the first accommodation chamber 100 of the straight barrel 10 at a distance.
As shown in fig. 6A to 6D of the drawings, the elastic element 51A of the axial parallel-keeping assembly 50A according to the alternative embodiment of the zoom lens of the present utility model includes a positioning element 511A and an elastic element 512A, wherein the elastic element 512A is disposed between the positioning element 511A and the fixing element 52A, and the elastic element 512A is in a suitable elastic deformation state (for example, when the elastic element 51 is a spring, it is in a compressed state) so that the positioning element 511A can be pressed against the inner wall 11 of the straight barrel 10. Accordingly, the axial parallelism maintaining assembly 50A applies a force in a preset direction to the movable cylinder 20A via the fixing member 52A to maintain the movable cylinder 20A in position and to ensure parallelism of the optical axis of the fixed lens group 30 and the optical axis of the movable lens group 40 of the zoom lens of the present utility model. Preferably, the elastic member 512A is a spring and is in a compressed state. Accordingly, the positioning member 511A is pressed against the inner wall of the straight barrel 10 by the elastic member 512A.
As shown in fig. 6A to 6D of the drawings, the fixing member 52A of the axial parallel-keeping member 50A according to the alternative embodiment of the zoom lens of the present utility model forms a positioning cavity 520A, wherein one end of the elastic member 512A is fixedly disposed in the positioning cavity 520A of the fixing member 52A, the other end of the elastic member 512A is connected to the positioning member 511A, and the positioning member 511A is disposed to at least partially protrude out of the positioning cavity 520A. Accordingly, the elastic member 512A is disposed in the positioning chamber 520A and compressed (pressed) to keep the positioning member 511A pressed against the inner wall 11 of the straight barrel 10.
As shown in fig. 6A to 6D of the drawings, the positioning cavity 520A of the axial parallel holding assembly 50A of the zoom lens according to the embodiment of the present utility model is cylindrical, the positioning member 511A is spherical, and the elastic member 512A is disposed between the positioning member 511A and the fixing member 52A, so that the positioning member 511A can be pressed against the inner wall 11 of the barrel 10 while minimizing the influence of the positioning member 511A on the movement of the movable barrel 20A relative to the barrel 10.
As shown in fig. 6A to 6D of the drawings, the axial parallel holding assembly 50A of the zoom lens according to the alternative embodiment of the present utility model further includes a driving member 53A, the straight barrel 10 forms a sliding groove 101, wherein one end of the driving member 53A is fixed on the movable barrel 20A, and the other end of the driving member 53A passes through the sliding groove 101 of the straight barrel 10, wherein the extending direction of the sliding groove 101 is parallel to the optical axis of the movable lens group 40 (or the same as the extending direction of the straight barrel 10), so that a user can drive the movable lens group 40 to move by the driving member 53A, and the moving direction of the driving member is the same as the extending direction of the sliding groove 101.
As shown in fig. 6A to 6D of the drawings, an alternative implementation of the zoom lens according to the embodiment of the present utility model includes at least one pair of axial parallel maintaining members 50A, wherein the fixing members 52A of the two axial parallel maintaining members 50A are fixedly disposed on the movable cylinder 20A, respectively, wherein the fixing members 52A of the axial parallel maintaining members 50A are perpendicular to the moving direction of the movable cylinder 20A, so as to enhance positioning of the movable cylinder 20A and prevent tilting of the movable cylinder 20A when moving relative to the straight cylinder 10.
As shown in fig. 6A to 6D of the drawings, the zoom lens according to the embodiment of the present utility model may optionally include at least two pairs of axial parallel holding members 50A, wherein the fixing members 52A of the two pairs of axial parallel holding members 50A are fixedly disposed on the movable cylinder 20A, respectively, spaced apart from each other, wherein the fixing members 52A of the axial parallel holding members 50A are perpendicular to the moving direction of the movable cylinder 20A, thereby enhancing positioning of the movable cylinder 20A and preventing tilting of the movable cylinder 20A when moving relative to the straight cylinder 10.
Therefore, the axial parallelism maintaining assembly 50A of the zoom lens of the present utility model maintains the relative position between the movable cylinder 20A and the fixed lens group 30 by applying the force perpendicular to the optical axis thereof (the optical axis of the movable lens group 40) to the movable cylinder, thereby reducing the requirement for clearance fit between the two, and better ensuring the axial parallelism of the fixed lens group 30 and the movable lens group 40 of the zoom lens of the present utility model.
As shown in fig. 6A to 6D of the drawings, according to the embodiment of the present utility model, the present utility model further provides another axial-parallel holding apparatus for a zoom lens, which includes a straight barrel 10, a movable barrel 20A, and at least one axial-parallel holding assembly 50A, wherein the straight barrel 10 forms a first accommodation chamber 100, the movable barrel 20A forms a second accommodation chamber 200A, the axial-parallel holding assembly 50A includes an elastic member 51A and a fixing piece 52A, wherein the movable barrel 20A is horizontally movably disposed within the first accommodation chamber 100 of the straight barrel 10, the fixing piece 52A of the axial-parallel holding assembly 50A is fixedly disposed at the movable barrel 20A, the elastic member 51A is disposed between the fixing piece 52A and the straight barrel 10, and the elastic member 51A is disposed so as to be capable of pressing against an inner wall of the straight barrel 10.
It will be appreciated by persons skilled in the art that the embodiments described above and shown in the drawings are only for the purpose of illustrating the utility model and are not to be construed as limiting the utility model.
All equivalent implementations, modifications and improvements within the spirit of the present utility model are intended to be included within the scope of the present utility model.
Claims (10)
1. An axial parallelism maintaining apparatus for a zoom lens, comprising:
straight barrel type lens barrel;
a movable cylinder; and
at least one axial parallel holding assembly, wherein the straight barrel forms a first accommodation chamber, the movable barrel forms a second accommodation chamber, the axial parallel holding assembly comprises an elastic element, wherein the movable barrel is horizontally movably arranged in the first accommodation chamber of the straight barrel, wherein the elastic element is arranged between the movable barrel and the straight barrel, and the elastic element is arranged to be capable of being pressed against the inner wall of the straight barrel.
2. The axial parallelism maintaining apparatus for a zoom lens according to claim 1, wherein the elastic member comprises at least one positioning member and at least one elastic member, wherein the elastic member is disposed between the positioning member and the movable cylinder, and the elastic member is disposed in an appropriate elastic deformation state.
3. The axial parallelism maintaining apparatus for a zoom lens according to claim 2, wherein the movable cylinder further forms at least one positioning chamber, wherein the elastic member is provided in the positioning chamber, and the positioning member is provided to protrude at least partially from the positioning chamber.
4. The axial parallelism maintaining apparatus for a zoom lens according to claim 2, wherein the movable cylinder is cylindrical, and the shape and size of the movable cylinder are set to fit the first accommodation chamber of the straight cylinder barrel.
5. The axial parallelism maintaining apparatus for a zoom lens according to claim 1, 2, 3 or 4, wherein the axial parallelism maintaining assembly further comprises at least one driving member, the straight barrel forms at least one sliding groove, wherein one end of the driving member is fixed to the movable barrel, and the other end is penetrated out of the sliding groove of the straight barrel, wherein the extending direction of the sliding groove is the same as the extending direction of the straight barrel.
6. An axial parallelism maintaining apparatus for a zoom lens, comprising:
straight barrel type lens barrel;
a movable cylinder; and
at least one axial parallel holding assembly, wherein the straight barrel forms a first accommodation chamber, the movable barrel forms a second accommodation chamber, the axial parallel holding assembly comprises an elastic element and a fixing piece, wherein the movable barrel is horizontally movably arranged in the first accommodation chamber of the straight barrel, the fixing piece of the axial parallel holding assembly is fixedly arranged on the movable barrel, the elastic element is arranged between the fixing piece and the straight barrel, and the elastic element is arranged to be capable of being pressed against the inner wall of the straight barrel.
7. The axial parallelism maintaining apparatus for a zoom lens according to claim 6, wherein the elastic member comprises at least one positioning member and at least one elastic member, wherein the elastic member is disposed between the positioning member and the fixing member, and the elastic member is disposed in an appropriate elastic deformation state.
8. The axial parallelism maintaining apparatus for a zoom lens according to claim 7, wherein the fixing member forms a positioning chamber, wherein the elastic member is disposed in the positioning chamber, and the positioning member is disposed to protrude at least partially from the positioning chamber.
9. The axial parallelism maintaining apparatus for a zoom lens according to claim 7, wherein the movable cylinder is cylindrical, and the shape and size of the movable cylinder are set to fit the first accommodation chamber of the straight cylinder barrel.
10. The axial parallelism maintaining apparatus for a zoom lens according to claim 6, 7, 8 or 9, wherein the axial parallelism maintaining assembly further comprises at least one driving member, the straight barrel forms at least one sliding groove, wherein one end of the driving member is fixed to the movable barrel, and the other end is penetrated out of the sliding groove of the straight barrel, wherein the extending direction of the sliding groove is the same as the extending direction of the straight barrel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222704917.2U CN219122486U (en) | 2022-10-12 | 2022-10-12 | Axial parallelism holding device for zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222704917.2U CN219122486U (en) | 2022-10-12 | 2022-10-12 | Axial parallelism holding device for zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219122486U true CN219122486U (en) | 2023-06-02 |
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ID=86525189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222704917.2U Active CN219122486U (en) | 2022-10-12 | 2022-10-12 | Axial parallelism holding device for zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219122486U (en) |
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2022
- 2022-10-12 CN CN202222704917.2U patent/CN219122486U/en active Active
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