CN216210159U - Compact infrared continuous zoom lens - Google Patents
Compact infrared continuous zoom lens Download PDFInfo
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- CN216210159U CN216210159U CN202122740096.3U CN202122740096U CN216210159U CN 216210159 U CN216210159 U CN 216210159U CN 202122740096 U CN202122740096 U CN 202122740096U CN 216210159 U CN216210159 U CN 216210159U
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Abstract
The utility model relates to a lens, in particular to a compact infrared continuous zoom lens, wherein at least 3 guide structures of the infrared continuous zoom lens are uniformly distributed along the circumference of a lens frame, each guide structure comprises a plurality of steel balls, a groove capable of containing the plurality of steel balls on the lens frame and a baffle plate for fixing the steel balls at two sides, the outer surface of each guide structure directly realizes rolling friction with the inner surface of a main lens barrel through the steel balls, and the compact infrared continuous zoom lens has the advantages of small guide friction force, compact space size, simple structure of the zoom lens frame, convenience in assembly and adjustment and the like. The driving nail structure is symmetrically distributed on two sides of the circumference of the lens frame and comprises a first fastening screw, a gasket, a rotary shaft sleeve and a waist line shaft, the first fastening screw sequentially penetrates through inner holes of the gasket and the waist line shaft to be fixedly connected with the lens frame, the rotary shaft sleeve is sleeved on a step surface of the waist line shaft, and the driving nail structure can prevent the follow-up rotation and loosening of a single fastening screw and can keep stable driving precision and strength of the driving nail.
Description
Technical Field
The utility model relates to a lens, in particular to a compact infrared continuous zoom lens.
Background
The existing zooming guide structure of the infrared continuous zoom lens mainly adopts a sliding friction guide structure and a sliding friction guide structure of inner and outer cylindrical surfaces of a zooming lens frame, the sliding friction guide structure of an optical axis and a shaft sleeve has two outstanding problems of large space size and large sliding friction force of the zooming lens frame, and the sliding friction guide structure of the inner and outer cylindrical surfaces of the zooming lens frame has large sliding friction force and can accelerate the abrasion of the matching surface of the zooming lens frame although the space size of the zooming lens frame is not large.
The existing infrared continuous zoom lens zooming cam driving nail structure mostly adopts a structure of 'single fastening screw + zooming driving nail rotating shaft sleeve', when a spiral driving notch of a zooming cam drives a zooming lens group and a compensation lens group axially through a driving nail, the friction force between the roller sleeve and the fastening screw can cause the follow-up rotation of the fastening screw, namely the fastening screw is loosened, and the loosening of the fastening screw can cause the reduction of the transmission precision and the reduction of the strength of the driving nail.
Disclosure of Invention
The utility model provides a compact infrared continuous zoom lens, which solves the problems of large space size and large zooming guiding friction of a zoom lens frame of the existing zoom mechanism, also solves the problem of loosening of a fastening screw after a single fastening screw rotates, and ensures high transmission precision and high strength of a driving screw, and comprises the following contents:
the utility model aims to provide a compact infrared continuous zoom lens, which comprises a main lens barrel, a front fixed lens group coaxially arranged in front of the main lens barrel, a cam sleeved on the outer cylindrical surface of the main lens barrel, a zoom lens group, a compensation lens group, a zoom driving mechanism, a focusing driving mechanism and a rear focusing lens group which are coaxially arranged in the main lens barrel from front to back in sequence, and is characterized in that: the zoom lens group, the compensation lens group and the rear focusing lens group comprise lens frames, lenses fixed in the lens frames through pressing rings, guide structures and driving nail structures, wherein the guide structures and the driving nail structures are fixedly arranged on the lens frames;
the lens comprises a main lens barrel, at least 3 guide structures and a plurality of baffle plates, wherein the guide structures are uniformly distributed along the circumference of the lens frame, each guide structure comprises a plurality of steel balls, grooves capable of containing the steel balls on the lens frame and the baffle plates for fixing the steel balls on two sides, and the outer surface of each guide structure directly realizes rolling friction with the inner surface of the main lens barrel through the steel balls.
Further, the drive nail structure symmetric distribution is in the both sides of lens frame circumference, the drive nail structure includes first fastening screw, packing ring, gyration axle cover and waist spool, first fastening screw passes the hole and the lens frame fixed connection of packing ring and waist spool in proper order, the gyration axle cover cup joints on the ladder face of waist spool.
Furthermore, a long waist hole is formed in the wall of the main lens barrel and is parallel to the axis of the main lens barrel; the driving nail structure connected with the lens frame extends out of the long waist hole.
Furthermore, a plurality of spiral driving grooves are formed in the cam, the spiral driving grooves are not parallel to the long waist hole, and a driving nail structure connected to the lens frame sequentially penetrates through the long waist hole and the spiral driving grooves and is in rolling contact with the spiral driving grooves through the rotating shaft sleeve.
Further, the cam includes a zoom cam and a back focus cam.
Furthermore, the zooming driving mechanism drives the zooming cam to rotate, and the spiral driving groove on the zooming cam converts the rotation motion of the zooming driving mechanism into axial motion, so that the opposite motion of the zoom lens group and the compensation lens group is realized.
Furthermore, the cam is sleeved on the outer cylindrical surface of the main lens barrel through a bearing.
Further, the baffle is fixedly connected to two sides of the lens frame through second fastening screws.
Compared with the prior art, the infrared continuous zoom lens has the beneficial effects that:
1. the compact infrared continuous zoom lens has the advantages that at least 3 guide structures are uniformly distributed along the circumference of the lens frame, each guide structure comprises a plurality of steel balls, a groove capable of accommodating the steel balls on the lens frame and a baffle plate for fixing the steel balls on two sides, the outer surface of each guide structure directly realizes rolling friction with the inner surface of the main lens barrel through the steel balls, and the guide structure has small guide friction force, compact space size, simple structure of the zoom lens frame, convenience in assembly and adjustment and the like.
2. The driving nail structure of the compact infrared continuous zoom lens is symmetrically distributed on two sides of the circumference of the lens frame, the driving nail structure comprises a first fastening screw, a gasket, a rotary shaft sleeve and a waist line shaft, the first fastening screw sequentially penetrates through the gasket and an inner hole of the waist line shaft to be fixedly connected with the lens frame, the rotary shaft sleeve is sleeved on a step surface of the waist line shaft, and the driving nail structure can prevent the follow-up rotation and loosening of a single fastening screw and can keep stable driving precision and strength of the driving nail.
Drawings
FIG. 1 is a schematic structural diagram of a compact infrared zoom lens according to the present invention;
FIG. 2 is a front view of the compact infrared zoom lens of the present invention;
FIG. 3 is a top view of the compact infrared zoom lens of the present invention;
FIG. 4 is a left side view of the compact infrared zoom lens of the present invention;
FIG. 5 is a partial exploded view of the compact infrared zoom lens of the present invention;
FIG. 6 is an exploded view of the zoom lens group/compensation lens group/rear focusing lens group of the compact infrared continuous zoom lens of the present invention;
FIG. 7 is a top view of the zoom lens group/compensation lens group/rear focusing lens group of the compact infrared continuous zoom lens of the present invention;
FIG. 8 is a partial enlarged view of the zoom lens group/compensation lens group/rear focusing lens group of the compact infrared continuous zoom lens of the present invention;
FIG. 9 shows the driving pin waist axis of the zoom lens group/compensation lens group/rear focusing lens group of the compact infrared continuous zoom lens of the present invention.
1: a main barrel; 2: a front fixed lens group; 3: a bearing; 4: a zoom cam; 5: a variable power lens group; 6: a compensation lens group; 7: a zoom drive mechanism; 8: a focus drive mechanism; 9: a rear focusing lens group; 5-1: a first fastening screw; 5-2: a gasket; 5-3: a revolving shaft sleeve; 5-4: a waist line axis; 5-5: steel balls; 5-6: a second fastening screw; 5-7: a baffle plate; 5-8: a lens frame; 5-9: a lens; 5-10: and (5) pressing a ring.
Detailed Description
Embodiments of the present invention will be described in detail below with reference to examples, but it will be understood by those skilled in the art that the following examples are only illustrative of the present invention and should not be construed as limiting the scope of the present invention. The examples, in which specific conditions are not specified, were conducted under conventional conditions or conditions recommended by the manufacturer.
Example 1
As shown in fig. 1-5, the present embodiment discloses a compact infrared continuous zoom lens, which includes a main barrel 1, a front fixed lens group 2 coaxially mounted in front of the main barrel 1, a cam sleeved on an outer cylindrical surface of the main barrel 1, a zoom lens group 5 coaxially disposed inside the main barrel 1 from front to back, a compensation lens group 6, a zoom driving mechanism 7, a focus driving mechanism 8, and a rear focus lens group 9.
As shown in fig. 6, the zoom lens group 5, the compensation lens group 6 and the back focus lens group 9 disclosed in this embodiment all include lens frames 5-8, lenses 5-9 fixed in the lens frames 5-8 by pressing rings 5-10, a guiding structure and a driving pin structure fixedly arranged on the lens frames 5-8;
the lens barrel comprises a main lens barrel 1, at least 3 guide structures and a plurality of baffle plates, wherein the number of the guide structures is at least 3, the guide structures comprise a plurality of steel balls 5-5, grooves capable of accommodating the steel balls 5-5 are formed in the lens frame 5-8, the baffle plates 5-7 are used for fixing the steel balls 5-5 on two sides, the outer surface of each guide structure directly realizes rolling friction with the inner surface of the main lens barrel 1 through the steel balls 5-5, and the guide structures have the advantages of small guide friction force, compact space size, simple structure of the zoom lens frame 5-8, convenience in assembly and adjustment and the like.
Preferably, the driving pin structures disclosed in fig. 7 are symmetrically distributed on two sides of the circumference of the lens frame 5-8, the driving pin structures comprise first fastening screws 5-1, washers 5-2, turning shaft sleeves 5-3 and waist line shafts 5-4 shown in fig. 9, the first fastening screws 5-1 sequentially penetrate through the inner holes of the washers 5-2 and the waist line shafts 5-4 to be fixedly connected with the lens frame 5-8, the turning shaft sleeves 5-3 are sleeved on the stepped surfaces of the waist line shafts 5-4, and the driving pin structures can prevent the follow-up rotation and loosening of the single fastening screw and can keep stable driving precision and strength of the driving pin.
Preferably, the wall of the main lens barrel 1 is provided with a long waist hole, and the long waist hole is parallel to the axis of the main lens barrel 1; the driving nail structure connected with the lens frames 5-8 extends out of the long waist hole.
Preferably, the cam is provided with a plurality of spiral driving grooves which are not parallel to the long waist hole, and the driving nail structure connected to the lens frame 5-8 sequentially penetrates through the long waist hole and the spiral driving grooves and is in rolling contact with the spiral driving grooves through the rotating shaft sleeve 5-3.
Preferably, the cam includes a zoom cam 4 and a back focus cam 10.
Preferably, the zoom driving mechanism 7 drives the zoom cam 4 to perform a rotation operation, and a spiral driving groove on the zoom cam 4 converts the rotation motion of the zoom driving mechanism 7 into an axial motion, so as to realize the opposite motion of the zoom lens group 5 and the compensation lens group 6.
Preferably, the cam is sleeved on the outer cylindrical surface of the main lens barrel 1 through a bearing 3.
Preferably, the baffle 5-7 is fixedly connected to the lens frame 5-8 by a second fastening screw 5-6. On both sides of the base.
Example 2
As shown in fig. 1-5, the present embodiment discloses a compact infrared continuous zoom lens, which includes a main barrel 1, a front fixed lens group 2 coaxially mounted in front of the main barrel 1, a cam sleeved on an outer cylindrical surface of the main barrel 1, a zoom lens group 5 coaxially disposed inside the main barrel 1 from front to back, a compensation lens group 6, a zoom driving mechanism 7, a focus driving mechanism 8, and a rear focus lens group 9.
As shown in fig. 6, the zoom lens group 5, the compensation lens group 6 and the back focus lens group 9 disclosed in this embodiment all include lens frames 5-8, lenses 5-9 fixed in the lens frames 5-8 by pressing rings 5-10, a guiding structure and a driving pin structure fixedly arranged on the lens frames 5-8;
the lens barrel comprises a main lens barrel 1, at least 3 guide structures and a plurality of baffle plates, wherein the number of the guide structures is at least 3, the guide structures comprise a plurality of steel balls 5-5, grooves capable of accommodating the steel balls 5-5 are formed in the lens frame 5-8, the baffle plates 5-7 are used for fixing the steel balls 5-5 on two sides, the outer surface of each guide structure directly realizes rolling friction with the inner surface of the main lens barrel 1 through the steel balls 5-5, and the guide structures have the advantages of small guide friction force, compact space size, simple structure of the zoom lens frame 5-8, convenience in assembly and adjustment and the like.
Preferably, the wall of the main lens barrel 1 is provided with a long waist hole, and the long waist hole is parallel to the axis of the main lens barrel 1; the driving nail structure connected with the lens frames 5-8 extends out of the long waist hole.
Preferably, the cam is provided with a plurality of spiral driving grooves which are not parallel to the long waist hole, and the driving nail structure connected to the lens frame 5-8 sequentially penetrates through the long waist hole and the spiral driving grooves and is in rolling contact with the spiral driving grooves.
Preferably, the cam includes a zoom cam 4 and a back focus cam 10.
Preferably, the zoom driving mechanism 7 drives the zoom cam 4 to perform a rotation operation, and a spiral driving groove on the zoom cam 4 converts the rotation motion of the zoom driving mechanism 7 into an axial motion, so as to realize the opposite motion of the zoom lens group 5 and the compensation lens group 6.
Preferably, the cam is sleeved on the outer cylindrical surface of the main lens barrel 1 through a bearing 3.
Preferably, the baffle 5-7 is fixedly connected to the lens frame 5-8 by a second fastening screw 5-6. On both sides of the base.
While particular embodiments of the present invention have been illustrated and described, it would be obvious that various other changes and modifications can be made without departing from the spirit and scope of the utility model. It is therefore intended to cover in the appended claims all such changes and modifications that are within the scope of this invention.
Claims (8)
1. The utility model provides an infrared zoom lens in succession of compact, includes main lens cone (1), coaxial arrangement preceding fixed lens group (2) before main lens cone (1), cup joints at the cam of main lens cone (1) outer face of cylinder, by preceding to back coaxial setting in proper order at inside variable magnification lens group (5) of main lens cone (1), compensation lens group (6), drive mechanism (7) zoom, focusing drive mechanism (8) and back focusing lens group (9), its characterized in that: the zoom lens group (5), the compensation lens group (6) and the rear focusing lens group (9) comprise lens frames (5-8), lenses (5-9) fixed in the lens frames (5-8) through pressing rings (5-10), and a guide structure and a driving nail structure which are fixedly arranged on the lens frames (5-8);
the lens barrel comprises at least 3 guide structures, wherein the guide structures are uniformly distributed along the circumference of a lens frame (5-8), each guide structure comprises a plurality of steel balls (5-5), grooves capable of containing the plurality of steel balls (5-5) are formed in the lens frame (5-8), and baffles (5-7) used for fixing the steel balls (5-5) on two sides, and the outer surface of each guide structure directly realizes rolling friction with the inner surface of a main lens barrel (1) through the steel balls (5-5).
2. A compact infrared zoom lens according to claim 1, wherein: the driving nail structure is symmetrically distributed on two sides of the circumference of the lens frame (5-8), the driving nail structure comprises first fastening screws (5-1), gaskets (5-2), a rotary shaft sleeve (5-3) and a waist line shaft (5-4), the first fastening screws (5-1) sequentially penetrate through inner holes of the gaskets (5-2) and the waist line shaft (5-4) and are fixedly connected with the lens frame (5-8), and the rotary shaft sleeve (5-3) is sleeved on a step surface of the waist line shaft (5-4).
3. A compact infrared zoom lens according to claim 2, wherein: the wall of the main lens cone (1) is provided with a long waist hole, the long waist hole is parallel to the axis of the main lens cone (1), and a driving nail structure connected with the lens frames (5-8) extends out of the long waist hole.
4. A compact infrared zoom lens according to claim 3, wherein: the cam is provided with a plurality of spiral driving grooves which are not parallel to the long waist hole, and the driving nail structure connected with the lens frame sequentially penetrates through the long waist hole and the spiral driving grooves and is in rolling contact with the spiral driving grooves through the rotary shaft sleeve (5-3).
5. The compact infrared zoom lens of claim 4, wherein: the cam includes a zoom cam (4) and a rear focus cam (10).
6. The compact infrared zoom lens of claim 5, wherein: the zooming driving mechanism (7) drives the zooming cam (4) to rotate, and a spiral driving groove on the zooming cam (4) converts the rotating motion of the zooming driving mechanism (7) into axial motion, so that the opposite motion of the zooming lens group (5) and the compensating lens group (6) is realized.
7. A compact infrared zoom lens according to claim 1, wherein: the cam is sleeved on the outer cylindrical surface of the main lens barrel (1) through a bearing (3).
8. A compact infrared zoom lens according to claim 1, wherein: the baffle plates (5-7) are fixedly connected to two sides of the lens frames (5-8) through second fastening screws (5-6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122740096.3U CN216210159U (en) | 2021-11-10 | 2021-11-10 | Compact infrared continuous zoom lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122740096.3U CN216210159U (en) | 2021-11-10 | 2021-11-10 | Compact infrared continuous zoom lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216210159U true CN216210159U (en) | 2022-04-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122740096.3U Active CN216210159U (en) | 2021-11-10 | 2021-11-10 | Compact infrared continuous zoom lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216210159U (en) |
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2021
- 2021-11-10 CN CN202122740096.3U patent/CN216210159U/en active Active
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