CN109541776A - A kind of mechanical cam zoom mechanism of guide rail guiding - Google Patents
A kind of mechanical cam zoom mechanism of guide rail guiding Download PDFInfo
- Publication number
- CN109541776A CN109541776A CN201811398833.2A CN201811398833A CN109541776A CN 109541776 A CN109541776 A CN 109541776A CN 201811398833 A CN201811398833 A CN 201811398833A CN 109541776 A CN109541776 A CN 109541776A
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- Prior art keywords
- zoom
- cam
- guide rail
- component
- fixed
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
- G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
- G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Lens Barrels (AREA)
Abstract
A kind of mechanical cam zoom mechanism of guide rail guiding of the present invention, including fixed cylinder, zoom cam canister, zoom cam retaining ring, zoom cam retaining ring pressing ring, zoom component, compensating unit, zoom motor component, zoom gear wheel, zoom guide rail and compensation guide rail；The zoom motor component is fixed on outside the fixed cylinder, and the pinion gear being arranged inside is engaged with the zoom gear wheel；The zoom gear wheel is fixed on the zoom cam canister towards on the outside of one end of the fixed cylinder, and the zoom motor component is engaged by the pinion gear and zoom gear wheel, is further driven to the zoom cam canister and is rotated；The zoom guide rail and compensation guide rail are respectively in the parallel supporting beam for being fixed on the fixed cylinder；The guiding that zoom component is realized by zoom guide rail, the guiding of compensating unit is realized by compensation guide rail, is guaranteed zoom component and compensating unit relative position by zoom cam canister, is realized continuous zoom function.
Description
Technical field
The invention belongs to optical technical fields, and in particular to a kind of mechanical cam zoom mechanism of guide rail guiding, it is especially suitable
For in the optical systems such as all kinds of thermal infrared imagers for realizing continuous zoom axially movable by microscope group or TV, low-light.
Background technique
The optoelectronic devices such as thermal infrared imager use more and more extensive, the optoelectronic device of continuous zoom in life, work
Very big ratio is accounted for, the mechanism of microscope group axial movement is realized by mechanical cam, is that continuous zoom thermal infrared imager, TV etc. are normal
A kind of form seen.
Mechanical cam zoom mechanism conventional at present have using polished rod guiding mechanical cam mechanism and lens barrel directly with it is convex
Take turns the mechanical cam mechanism etc. of cylinder inner hole guiding.The mechanical cam mechanism being oriented to using polished rod, needs circumferentially to arrange 3
Polished rod realizes the guiding of zoom component and compensating unit, and occupied space is larger, and due to the position deviation of polished rod mounting hole, light
The Accumulated deviation of the formation such as the straightness of bar and lens barrel fit clearance and polished rod itself, causes guiding accuracy lower.Lens barrel outer circle
It is directly oriented to mechanical cam mechanism with cam canister inner hole, lacks adjustment link, keeps entire MECHANISM PRECISION adjustment difficult.This hair
The mechanical cam zoom mechanism effective solution of bright guide rail guiding problem above, for realize high-performance, miniaturization it is infrared
The optoelectronic devices such as thermal imaging system provide new method.
Summary of the invention
Technical problems to be solved:
In order to avoid the shortcomings of the prior art, the present invention proposes a kind of mechanical cam zoom mechanism of guide rail guiding,
The rotation of zoom cam canister is driven by zoom motor component, the guiding of zoom component is realized by zoom guide rail, is led by compensation
Rail realizes the guiding of compensating unit, guarantees zoom component and compensating unit relative position by zoom cam canister, realizes continuous become
Times function.
The technical scheme is that a kind of mechanical cam zoom mechanism of guide rail guiding, including fixed cylinder, zoom cam
Cylinder, zoom cam retaining ring, zoom cam retaining ring pressing ring, zoom component and compensating unit；The both ends of the fixed cylinder pass through parallel
It is fixed in its axial supporting beam, the zoom cam canister is set in the supporting beam, and is coaxially installed on the fixed cylinder
Both ends between；The zoom cam retaining ring and zoom cam retaining ring pressing ring are sequentially arranged at the fixed cylinder external end head, are used for
The axial position of the zoom cam canister limits；It is characterized by also including zoom motor component, zoom gear wheel, zooms to lead
Rail and compensation guide rail；The zoom motor component is fixed on outside the fixed cylinder, and the pinion gear being arranged inside and the zoom are big
Gear engagement；The zoom gear wheel is fixed on the zoom cam canister towards one end of fixed cylinder outside, the zoom
Motor component is engaged by the pinion gear and zoom gear wheel, is further driven to the zoom cam canister rotation；
Guide rail is parallel respectively is fixed in the different supporting beams with compensation for the zoom guide rail, while being set to described
In zoom cam canister；The zoom component is fixed on on the first sliding block of zoom guide rail cooperation, and the compensating unit is solid
Due on the second sliding block cooperated with the compensation guide rail；Zoom cam path and compensation cam are provided on the zoom cam canister
Slot；The zoom finger being fixed on the zoom component passes through the zoom cam path, is able to drive the zoom component along institute
The zoom curve movement of zoom cam path is stated, and then is slided along the zoom guide rail；The compensation being fixed on the compensating unit
Finger pass through the compensation cam path, be able to drive the compensating unit along it is described compensation cam path zoom curve movement, into
And it is slided along the compensation guide rail；The zoom component and compensating unit do synchronous reciprocating linear motion, realize continuous zoom function
Energy.
A further technical solution of the present invention is: sliding block gasket is installed between the zoom component and the first sliding block,
By adjusting the thickness and quantity of the sliding block gasket, position of the zoom component in its Z-direction is further adjusted；?
Sliding block gasket is installed between the compensating unit and the second sliding block, by adjusting the thickness and quantity of the sliding block gasket, into
Position of the compensating unit described in one successive step in its Z-direction；The Y-axis of the zoom component and the compensating unit is and institute
The central axis for stating fixed cylinder is in the same direction.
A further technical solution of the present invention is: the zoom component is fixed on first sliding block by screw, lead to
It crosses and adjusts on the zoom component for installing the position of the first installation via hole of the screw, further adjust the zoom portion
Position of the part in its X-direction；The compensating unit is fixed on second sliding block by screw, by adjusting the benefit
It repays on component for installing the position of the second installation via hole of the screw, further adjusts the compensating unit in its X-axis side
Upward position.
A further technical solution of the present invention is: the zoom cam path and the zoom curve for compensating cam path are all bases
The zoom curve that optical design provides.
A further technical solution of the present invention is: being installed in the fixed cylinder with the zoom cam canister one end fits
The circumferential uniformly distributed several steel balls in place；In described zoom cam retaining ring one end, place's week is coupled with the zoom cam canister other end
To uniformly several steel balls；The steel ball can reduce the friction between the fixed cylinder and zoom cam canister.
Beneficial effect
The beneficial effects of the present invention are:
1, it occupies little space:
By using mechanical cam configuration, the bulk of movement mechanism is had compressed.This zoom mechanism is oriented to using guide rail,
It is compact-sized, it is rationally distributed, substantially reduce the bulk of zoom mechanism.
2, comprehensive precision can be achieved to adjust:
One group of guide rail guiding is respectively used by zoom component and compensating unit, guarantees that zoom component and compensating unit precision are adjusted
Independence；X, the adjustment link of tri- orthogonal directions of Y, Z guarantees the comprehensive regulating power of each visual field.
3, optical axis repeatable accuracy is high:
Moving component and sliding block are fastened by screw, are cooperated between guide rail and sliding block for high-precision, movement mechanism gap compared with
It is small, improve optical axis repeatable accuracy；The convex race of zoom cam canister limits moving component, guarantees the repeatable accuracy of the optical axis.
The steel ball being arranged at the fixed cylinder and zoom cam retaining ring and the both ends cooperation of zoom cam canister effectively reduces friction, improves rotation
Precision.
Detailed description of the invention
A kind of minimum visual field schematic diagram of mechanical cam zoom mechanism of guide rail guiding of Fig. 1；
A kind of mechanical cam zoom structural scheme of mechanism of guide rail guiding (removal zoom cam canister) of Fig. 2；
A kind of minimum visual field schematic internal view of mechanical cam zoom mechanism of guide rail guiding of Fig. 3；
A kind of very big visual field schematic diagram of mechanical cam zoom mechanism of guide rail guiding of Fig. 4；
A kind of very big visual field schematic internal view of mechanical cam zoom mechanism of guide rail guiding of Fig. 5；
A kind of mechanical cam zoom mechanism zoom component adjustment direction schematic diagram 1 of guide rail guiding of Fig. 6；
A kind of mechanical cam zoom mechanism zoom component adjustment direction schematic diagram 2 of guide rail guiding of Fig. 7；
A kind of mechanical cam zoom mechanism compensating unit adjustment direction schematic diagram 1 of guide rail guiding of Fig. 8；
A kind of mechanical cam zoom mechanism compensating unit adjustment direction schematic diagram 2 of guide rail guiding of Fig. 9；
Description of symbols:: 1- fixed cylinder, 2- zoom cam canister, 3- zoom gear wheel, the screw of 4-M1.6 × 6,5- zoom
The screw of finger, 6-M3 × 8,7- zoom motor component, 8- zoom cam retaining ring, 9- compensate finger, 10- zoom guide rail, 11- zoom
Component, 12- steel ball, the screw of 13-M2 × 5, the screw of 14-M2 × 6,15- sliding block gasket, 16- compensation guide rail, 17- compensating unit,
18- zoom cam retaining ring pressing ring.
Specific embodiment
The embodiments described below with reference to the accompanying drawings are exemplary, it is intended to be used to explain the present invention, and cannot understand
For limitation of the present invention.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise " is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of
The description present invention and simplified description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with spy
Fixed orientation construction and operation, therefore be not considered as limiting the invention.
Referring to Fig.1-5, a kind of mechanical cam zoom mechanism of guide rail guiding of the present invention, including fixed cylinder 1, zoom cam canister
2, zoom cam retaining ring 8, zoom cam retaining ring pressing ring 18, zoom component 11, compensating unit 17, zoom motor component 7, zoom are big
Gear 3, zoom guide rail 10 and compensation guide rail 16；The both ends of fixed cylinder 1 are fixed by being parallel to its axial supporting beam, and zoom is convex
Wheel cylinder 2 is set in the supporting beam, and is coaxially installed between the both ends of fixed cylinder 1；Zoom cam retaining ring 8 and zoom cam
Retaining ring pressing ring 18 is sequentially arranged at 1 external end head of fixed cylinder, and the axial position for zoom cam canister 2 limits.On zoom cam canister 2
It is provided with zoom cam path and compensation cam path, the zoom curve that zoom cam path and compensation cam path are provided according to optical design
Design.
1, zoom motor component mounting means: zoom motor component 7 is fastened on outside fixed cylinder 1 by the screw of M3 × 86
Side, the interior pinion gear being arranged of zoom motor component 7 are engaged with zoom gear wheel 3；Zoom gear wheel 3 is fixed on zoom cam canister 2
Towards on the outside of one end of fixed cylinder 1, zoom motor component 7 is engaged by pinion gear and zoom gear wheel 3, is further driven to become
Times cam canister 2 rotates.
2, moving component mounting means: guide rail 16 is parallel respectively is fixed on the different supports with compensation for zoom guide rail 10
Liang Shang, while being set in the zoom cam canister；After matching suitable sliding block gasket 15, by the screw of M2 × 5 13 by zoom
Component 11 is anchored on the first sliding block cooperated with zoom guide rail 10；After matching suitable sliding block gasket 15, pass through the screw of M2 × 5
Compensating unit 17 is anchored on and is compensated on the second sliding block that guide rail 10 cooperates by 13；Zoom cam canister 2 is installed to fixed cylinder 1
On, suitable position is gone to, zoom finger 5 is passed through from the zoom cam path on zoom cam canister 2 and is fastened to zoom portion
On part 11；Compensation finger 9 is passed through from the compensation cam path on zoom cam canister 2 and is fastened on compensating unit 17.Zoom
Finger 5 is able to drive zoom component 11 along the zoom curve movement of the zoom cam path, and then slides along zoom guide rail 10；It mends
It repays finger 9 and is able to drive compensating unit 17 along the zoom curve movement of the compensation cam path, and then along the compensation sliding of guide rail 16；
Zoom component 11 and compensating unit 17 do synchronous reciprocating linear motion, realize continuous zoom function.
3, the mounting means of zoom cam canister 2: several steel balls 12 along 1 both ends of fixed cylinder and are become by auxiliary assembly tooling
The installation place excircle of times cam canister 2 is uniformly distributed；2 one end of zoom cam canister is attached in fixed cylinder 1, while wrapping steel ball 12；
Zoom cam canister 2 is rotated by steel ball 12 around fixed cylinder 1, and frictional force when zoom cam canister 2 rotates is reduced；By zoom cam catch
Circle pressing ring 18 tightens fixation on zoom cam retaining ring 8.
4, precision regulative mode: by matching sliding block gasket 15, realize that zoom component 11 is pacified perpendicular to zoom component 11
The precision in dress face direction is adjusted, and the movement of via hole is installed by screw in zoom component 11, realizes that screw installs via hole line side
To precision adjust, guarantee zoom component 11 required precision；Guarantee that zoom guide rail 10 is parallel with benchmark optical axis by wearing axis
Degree guarantees zoom component 11 when moving along zoom guide rail 10, the concentricity of zoom mirror and benchmark optical axis in zoom component 11 and
Angle meets optical accuracy requirement partially；By matching sliding block gasket 15, realize that compensating unit 17 is installed perpendicular to compensating unit 17
The precision in face direction is adjusted, and the movement of via hole is installed by screw in compensating unit 17, realizes that screw installs via hole line direction
Precision adjust, guarantee compensating unit 17 required precision；Guarantee the depth of parallelism of compensation guide rail 16 and benchmark optical axis by wearing axis,
When guaranteeing that compensating unit 17 is moved along compensation guide rail 16, the concentricity of compensating glass and benchmark optical axis in compensating unit 17 and angle are inclined
Meet optical accuracy requirement.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art are not departing from the principle of the present invention and objective
In the case where can make changes, modifications, alterations, and variations to the above described embodiments within the scope of the invention.
Claims (5)
1. a kind of mechanical cam zoom mechanism of guide rail guiding, including fixed cylinder, zoom cam canister, zoom cam retaining ring, zoom
Cam retaining ring pressing ring, zoom component and compensating unit；The both ends of the fixed cylinder are fixed by being parallel to its axial supporting beam,
The zoom cam canister is set in the supporting beam, and is coaxially installed between the both ends of the fixed cylinder；The zoom is convex
Wheel retaining ring and zoom cam retaining ring pressing ring are sequentially arranged at the fixed cylinder external end head, the axial position for the zoom cam canister
Set restriction；It is characterized by also including zoom motor component, zoom gear wheel, zoom guide rail and compensation guide rails；The zoom electricity
Machine component is fixed on outside the fixed cylinder, and the pinion gear being arranged inside is engaged with the zoom gear wheel；The zoom gear wheel
Be fixed on the zoom cam canister towards on the outside of one end of the fixed cylinder, the zoom motor component by the pinion gear and
The engagement of zoom gear wheel is further driven to the zoom cam canister rotation；
Guide rail is parallel respectively is fixed in the different supporting beams with compensation for the zoom guide rail, while being set to the zoom
In cam canister；The zoom component is fixed on on the first sliding block of zoom guide rail cooperation, and the compensating unit is fixed on
On the second sliding block of the compensation guide rail cooperation；Zoom cam path and compensation cam path are provided on the zoom cam canister；
The zoom finger being fixed on the zoom component passes through the zoom cam path, is able to drive the zoom component along the change
The zoom curve movement of times cam path, and then slided along the zoom guide rail；The compensation finger being fixed on the compensating unit
Across the compensation cam path, the compensating unit is able to drive along the zoom curve movement of the compensation cam path, Jin Eryan
The compensation guide rail sliding；The zoom component and compensating unit do synchronous reciprocating linear motion, realize continuous zoom function.
2. the mechanical cam zoom mechanism of guide rail guiding according to claim 1, it is characterised in that: in the zoom component and
Sliding block gasket is installed between the first sliding block, by adjusting the thickness and quantity of the sliding block gasket, further adjusts the change
Times position of the component in its Z-direction；Sliding block gasket is installed between the compensating unit and the second sliding block, by adjusting
The thickness and quantity of the sliding block gasket further adjust position of the compensating unit in its Z-direction；The zoom portion
The Y-axis of part and the compensating unit is in the same direction with the central axis of the fixed cylinder.
3. the mechanical cam zoom mechanism of guide rail guiding according to claim 2, it is characterised in that: the zoom component passes through
Screw is fixed on first sliding block, installs via hole for installing the first of the screw by adjusting on the zoom component
Position, further adjust position of the zoom component in its X-direction；The compensating unit is fixed on institute by screw
It states on the second sliding block, by adjusting the position of the second installation via hole on the compensating unit for installing the screw, into one
Position of the compensating unit described in successive step in its X-direction.
4. according to claim 1 guide rail guiding mechanical cam zoom mechanism, it is characterised in that: the zoom cam path and
The zoom curve of compensation cam path is all the zoom curve provided according to optical design.
5. the mechanical cam zoom mechanism of guide rail guiding according to claim 1, it is characterised in that: in the fixed cylinder,
With the circumferentially uniformly distributed several steel balls in the zoom cam canister one end fits installation place；It is and described in described zoom cam retaining ring one end
The circumferentially uniformly distributed several steel balls in the zoom cam canister other end place of being coupled；The steel ball can reduce the fixed cylinder and zoom is convex
Take turns the friction between cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811398833.2A CN109541776A (en) | 2018-11-22 | 2018-11-22 | A kind of mechanical cam zoom mechanism of guide rail guiding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811398833.2A CN109541776A (en) | 2018-11-22 | 2018-11-22 | A kind of mechanical cam zoom mechanism of guide rail guiding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109541776A true CN109541776A (en) | 2019-03-29 |
Family
ID=65849517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811398833.2A Pending CN109541776A (en) | 2018-11-22 | 2018-11-22 | A kind of mechanical cam zoom mechanism of guide rail guiding |
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| CN (1) | CN109541776A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114265169A (en) * | 2021-12-17 | 2022-04-01 | 武汉振光科技有限公司 | One-way continuous rotation adjusting cam barrel device |
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| CN108563004A (en) * | 2018-02-02 | 2018-09-21 | 中国科学院西安光学精密机械研究所 | Three-group linkage continuous zooming mechanism with highly stable optical axis |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005274717A (en) * | 2004-03-23 | 2005-10-06 | Fujinon Corp | Zoom camera |
| WO2009052999A1 (en) * | 2007-10-24 | 2009-04-30 | Swiss Medical Technology Gmbh | Zoom system for an optical stereo device |
| CN102901620A (en) * | 2012-10-31 | 2013-01-30 | 中国科学院长春光学精密机械与物理研究所 | Universal high-precision adjusting and detection device for laser beam combining system and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114265169A (en) * | 2021-12-17 | 2022-04-01 | 武汉振光科技有限公司 | One-way continuous rotation adjusting cam barrel device |
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