CN100412679C - Extension lens - Google Patents
Extension lens Download PDFInfo
- Publication number
- CN100412679C CN100412679C CNB2005100513785A CN200510051378A CN100412679C CN 100412679 C CN100412679 C CN 100412679C CN B2005100513785 A CNB2005100513785 A CN B2005100513785A CN 200510051378 A CN200510051378 A CN 200510051378A CN 100412679 C CN100412679 C CN 100412679C
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- ring wall
- rotating part
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- skewed slot
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Abstract
The present invention discloses a telescopic lens which comprises a main body, a first rotating member, a second rotating member, a first power set, a second power set and an object glass set, wherein the first and the second rotating members which can be rotated around the main body are driven by the first and the second power sets; the object glass set can generate different displacement velocities along an axis direction along a plurality of first and second chutes with different slopes on the first and the second rotating members. Thereby, different driving force and speed reducing ratio can be prepared in the first and the second power sets aiming at the slope of the first and the second chutes in the first and the second rotating members; furthermore, the focusing accuracy of the object glass set is enhanced, and noise in operation is reduced.
Description
Technical field
The present invention relates to a kind of dolly camera, particularly relate to a kind of dolly camera that can make an objective lens with high and low speed displacement focusing.
Background technology
Ginseng Fig. 1, Fig. 2, general dolly camera 1 mainly comprises a body 11, a rotating part 12, a power packages 13 and an objective lens 14.
But this rotating part 12 be turn be set on this body 11, and have a ring wall 121 around an axis X, run through this ring wall 121 three skewed slots 122, run through three transfer grooves 123 that this ring wall 121 and this axis X of vertical surrounding distribute, pass aforementioned transfer groove 123 and be positioned at most pilot pins 124 on this body 11 respectively, and be formed on a groove section 125 of these ring wall 121 1 inside surfaces and a contiguous end.Aforementioned pilot pin 124 can cooperate the stroke of aforementioned transfer groove 123, makes this rotating part 12 can only do the limited angle of circling round.
This power packages 13 has a motor 131 that is arranged in this body 11, a deceleration part 132 that can transmit these motor 131 power, reaches the transmission gear 133 with these deceleration part 132 interlocks and exportable power.This transmission gear 133 be pass this body 11 and with 125 engagements of this rotating part 12 groove sections.
This objective lens 14 is arranged in the ring wall 121 of this rotating part 12, and have a mirror ring 141, be positioned at the eyeglass 142 in this mirror ring 141, and be set in the aforementioned skewed slot 122 respectively and be positioned at most spigots 143 on this mirror ring 141 around this axis X.
When this power packages 13 with the large and small driving force of difference, when driving these rotating part 12 high speed turns or low speed turn, can make this objective lens 14, in the process that shifts synchronously with of the variation of aforementioned spigot 143 along aforementioned skewed slot 122 angles, along this axis X direction displacement, produce different focusing speed.Whereby, this objective lens 14 can be searched the focal plane imaging scope to focus at a high speed, with the exact position of this eyeglass 142 of low speed focusing control, reaches the purpose of adjustment to the thing focal length again.Though above-mentioned structure can make the speed and the degree of accuracy in when focusing obtain a good equilibrium point, when it uses in reality, still there is following disappearance and needs to be resolved hurrily:
Generally speaking, aforementioned skewed slot 122 is with respect to an angle theta bigger (being that slope tg θ is bigger) that is parallel to the baseline X1 of this axis X, this objective lens 14 during along the displacement of this axis X direction back clearance (backlash) influence little, the displacement stroke susceptibility is just lower, therefore, the focusing precision is higher, opposite, aforementioned skewed slot 122 is with respect to the angle theta of this this baseline X1 littler (being that slope tg θ is less), then required driving force and reduction gear ratio are also just high, and the influence of back clearance (backlash) can be healed seriously, and the focusing precision is lower, and should the deceleration part multi-stage speed-reducing gears (figure does not show) form in 132 noise also can heal greatly.
Because 1 of this dolly camera is adopted a power packages 13 and is carried out focusing at a high speed and low speed focusing, therefore, though this power packages 13 can produce different driving forces, but, reduction gear ratio many with maximum carry on the back or on the head into design consideration higher, so, have only under a kind of situation of angle theta at aforementioned skewed slot 122, often when low speed was focused, meeting was because driving force and reduction gear ratio are higher for this dolly camera 1, and noise certainly also can be bigger.And if aforementioned skewed slot 122 angle theta the time are dwindled in design, then the influence of these objective lens 14 back clearances is more serious, and the focusing precision also can reduce relatively, makes this dolly camera 1 obtain a preferable equilibrium point between focusing precision and back clearance influence.
Summary of the invention
The object of the present invention is to provide a kind of dolly camera that can be equipped with the different dynamic group at the skewed slot of Different Slope.
The invention is characterized in: this dolly camera comprises: a body, one first rotating part, one first power packages, one second rotating part, one second power packages and an objective lens.This body has the surrounding wall around an axis.This first rotating part has one first ring wall around this axis, and is arranged at most first skewed slots of this first ring wall, and this first ring wall is to be set on the surrounding wall of this body with an end.This first power packages is to drive the rotation of circling round of this first rotating part.This second rotating part has one second ring wall around this axis, and is arranged at most second skewed slots that this second ring wall and slope are different from aforementioned first skewed slot, and this second ring wall is to be set on the surrounding wall of this body with an end.This second power packages is to drive the rotation of circling round of this second rotating part.This objective lens has along this axis direction docks and a mirror ring, a moving part of mutually turn mutually, and be arranged at a wherein eyeglass of inside of this mirror ring and this moving part, this mirror ring is arranged in this first ring wall, and have most first spigots that are set in aforementioned first skewed slot, this moving part has most second spigots that are set in aforementioned second skewed slot, make this objective lens follow first, second skewed slot of Different Slope on this first, second rotating part, produce different velocity of displacements along this axis direction.
Effect of the present invention is to improve the focusing precision simultaneously, and reduces noise.
Description of drawings
The present invention is described in detail below in conjunction with drawings and Examples.
Fig. 1 is a three-dimensional exploded view, and general dolly camera is described.
Fig. 2 is a cut-open view, and the combination situations of aforementioned dolly camera is described.
Fig. 3 is a three-dimensional exploded view, and a preferred embodiment of the present invention's one dolly camera is described.
Fig. 4 is a cut-open view, and the combination situations of this preferred embodiment is described.
Fig. 5 is a synoptic diagram, and an objective lens transfixion in this preferred embodiment is described.
Fig. 6 is a synoptic diagram, illustrates that this objective lens is driven by one second rotating part in this preferred embodiment.
Fig. 7 is a synoptic diagram, illustrates that this objective lens is driven by one first rotating part in this preferred embodiment.
Fig. 8 is a cut-open view, illustrates that this objective lens is along an axis direction displacement in this preferred embodiment.
Embodiment
Ginseng Fig. 3, Fig. 4 are respectively three-dimensional exploded view and cut-open view, and the preferred embodiment of dolly camera of the present invention comprises: a body 2, one first rotating part 3, one first power packages 4, one second rotating part 5, one second power packages 6 and an objective lens 7.
This body 2 has a surrounding wall 21 around an axis X, run through this surrounding wall 21 and respectively away from one first window 22 and one second window 23 of contiguous these surrounding wall 21 1 ends 211, reach three pilot pins 24.
This first rotating part 3 has one first ring wall 31 around this axis X, be arranged at 3 first skewed slots 32 of this first ring wall 31, run through 3 first transfer grooves 33 that these first ring wall, 31 1 ends 311 and this axis X of vertical surrounding distribute, and is formed on these first ring wall, 31 1 inside surfaces 312 and with respect to one first groove section 34 of this end 311.But this first ring wall 31 be with these end 311 turns be set in this body 2 surrounding walls 21.Aforementioned first skewed slot 32 is to intersect with a baseline X1 of parallel this axis X respectively, and is formed with one first angle theta 1 with this baseline X1.This first groove section 34 is towards this first window 22.
This first power packages 4 has a motor 41 that is arranged in this body 2, a deceleration part 42 that can transmit these motor 41 power, reaches the transmission gear 43 with these deceleration part 42 interlocks and exportable this power.This transmission gear 43 be pass this first window 22 and with 34 engagements of this first groove section, make this first power packages 4 can drive this first rotating part 3.
This second rotating part 5 has one second ring wall 51 around this axis X, be arranged at this second ring wall 51 and slope be different from aforementioned first skewed slot 32 3 second skewed slots 52, run through 3 second transfer grooves 53 that these second ring wall, 51 1 ends 511 and this axis X of vertical surrounding distribute, be formed on these second ring wall, 51 1 inside surfaces 512 and with respect to one second groove section 54 of this end 511.This second ring wall 51 is around this first ring wall 31, and respectively with aforementioned second transfer groove 53 with respect to aforementioned first transfer groove 33, be fixed on this body 2 surrounding walls 21 after making aforementioned pilot pin 24 pass aforementioned first, second transfer groove 33,53 respectively, reach the stroke that can cooperate aforementioned first, second transfer groove 33,53, make this first, second rotating part 3,5 do the limited anglec of rotation.Aforementioned second skewed slot 52 be respectively with parallel this axis X-baseline X2 intersects, and is formed with one second angle theta 2 less than this first angle theta 1 with this baseline X2, makes the slope tg θ 1 of the slope tg θ 2 of aforementioned second skewed slot 52 less than aforementioned first skewed slot 32.This second groove section 54 is towards this second window 23.
This second power packages 6 has a motor 61 that is arranged in this body 2, a deceleration part 62 that can transmit these motor 61 power, reaches the transmission gear 63 with these deceleration part 62 interlocks and exportable this power.This transmission gear 63 be pass this second window 23 and with 54 engagements of this second groove section, make this second power packages 6 can drive this second rotating part 4.
This objective lens 7 has a mirror ring 71, a moving part 72, and is installed in an eyeglass 73 of these mirror ring 71 inside.
This mirror ring 71 is arranged in this first ring wall 31, and the three arc grooves 714 that have a mirror wall 711, pass most first spigots 713 being positioned at these mirror wall 711 1 outer peripheral faces behind aforementioned first skewed slot 32 respectively, run through this mirror wall 711 and distribute along parallel this axis X direction, and pass three limited bolts 715 of aforementioned arc groove 714 respectively around this axis X around this axis X.
This moving part 72 has around an internal ring wall 721 of this axis X and an external annulus 722, is formed on the annular space 723 of 721,722 of this inside and outside ring walls, and most second spigots 724.This internal ring wall 721 is to dock with this mirror ring 71 along this axis X direction, and fastens along parallel this axis direction for aforementioned limited bolt 715, this moving part 72 is linked with this mirror ring 71 be one.But aforementioned annular space 723 is to place with supplying these first, second ring wall 31,51 turns.Aforementioned second spigot 724 is to run through this external annulus 72 respectively and be set in second skewed slot 52 of this second rotating part 5.
Though in the present embodiment this eyeglass 73 is installed in this mirror ring 71, also can changes into and being installed in this moving part 72, and not break away from spirit of the present invention.
Below utilize the action synoptic diagram of Fig. 5～Fig. 7 to illustrate focusing action of the present invention.
Ginseng Fig. 3, Fig. 5, this eyeglass 73 is transfixions and be positioned at a primary importance L1.
Ginseng Fig. 3, Fig. 6, when second power packages, 6 these second rotating parts 5 of driving are fixed a point anglec of rotation α 1 around this body 2 with counter clockwise direction, angle when this moving part 72 can follow aforementioned second skewed slot 52 to rotate with aforementioned second spigot 724 changes, drive this mirror ring 71 synchronously along this axis X direction displacement, make this eyeglass 73 arrive a second place L2, at this moment, because of this first rotating part 3 motionless, aforementioned first spigot 713 is along this axis X direction change location the time, can follow aforementioned first skewed slot 32 to produce the variation of angle and drive this mirror ring 71 rotations, this is first years old, second spigot 713,724 differential seat angle β 1 is to be absorbed by aforementioned arc groove 714.
Whereby, because second angle theta 2 of aforementioned second skewed slot 52 is less, therefore, during these second rotating part, 5 turns, is to drive this objective lens 7 to follow aforementioned second skewed slot 52 focusing at a high speed, and can searches apace the focal plane imaging scope.
Ginseng Fig. 3, Fig. 7, when first power packages, 4 these first rotating parts 3 of driving are fixed a point anglec of rotation α 2 in a clockwise direction around this body 2, angle when this mirror ring 71 can follow aforementioned first skewed slot 32 to rotate with aforementioned first spigot 713 changes, drive this moving part 72 synchronously along this axis X direction displacement, make this eyeglass 73 arrival-Di three position L3, this moment is motionless because of this second rotating part 5, aforementioned second spigot 724 is along this axis X direction change location the time, can follow aforementioned second skewed slot 52 to produce the variation of angle and drive this moving part 72 rotations, this is first years old, second spigot 713,724 differential seat angle β 2 is to be absorbed by aforementioned arc groove 714.
Whereby, because first angle theta 1 of aforementioned first skewed slot 32 is bigger, therefore, during these first rotating part, 3 turns, be to drive this objective lens 7 to follow aforementioned first skewed slot, 32 low speed focusing, have lower displacement susceptibility, can control the exact position of this eyeglass 73 because the back clearance influence is little.
As shown in Figure 8, the cut-open view of finishing for the above-mentioned Fig. 7 focusing of correspondence.
Importantly, this first, second rotating part the 3, the 5th adopts first, second different power packages 4,6 independently of one another, therefore, this first, second power packages 4,6 can cooperate slope tg θ 1, the tg θ 2 of aforementioned first, second skewed slot 32,52 respectively, the driving force of user demand, and the suitable reduction gear ratio of design, and then reduction motor noise, and can be under the different situation of aforementioned first, second skewed slot 32,52 slope tg θ 1, tg θ 2, with higher displacement susceptibility, and can promote the degree of accuracy in when focusing.
According to the above as can be known, dolly camera of the present invention has following advantage and effect:
Because the present invention adopts bispin moving part (first, second rotating part 3,5) with double dynamical group (first, second power packages 4,6) drive this objective lens 7, therefore, this is first years old, second power packages 4, the 6th, can at this first, second rotating part 3, in 5 aforementioned first, second skewed slot 32,52 slope tg θ 1, tg θ 2 is equipped with different driving force and reduction gear ratio, and then the influence of minimizing back clearance, reduce motor noise, and can be aforementioned first, second skewed slot 32,52 slope tg θ 1, under the different situation of tg θ 2, reach the characteristic of low displacement susceptibility with fast offset, and can promote the degree of accuracy when focusing.
Claims (9)
1. dolly camera is characterized in that it includes:
One body has the surrounding wall around an axis;
One first rotating part has one first ring wall around this axis, and is arranged at most first skewed slots of this first ring wall, and this first ring wall is to be set on the surrounding wall of this body with an end;
One first power packages is to drive the rotation of circling round of this first rotating part;
One second rotating part has one second ring wall around this axis, and is arranged at most second skewed slots that this second ring wall and slope are different from aforementioned first skewed slot, and this second ring wall is to be set on the surrounding wall of this body with an end;
One second power packages is to drive the rotation of circling round of this second rotating part; And
One objective lens, have along this axis direction and dock mutually and a mirror ring, a moving part of mutually turn, and be arranged at a wherein eyeglass of inside of this mirror ring and this moving part, this mirror ring is arranged in this first ring wall, and have most first spigots that are set in aforementioned first skewed slot, this moving part has most second spigots that are set in aforementioned second skewed slot, make this objective lens follow first, second skewed slot of Different Slope on this first, second rotating part, produce different velocity of displacements along this axis direction.
2. dolly camera as claimed in claim 1, it is characterized in that, this body has most pilot pins, this first, second rotating part has most first transfer grooves and most individual second transfer grooves that run through this first, second ring wall end and this axis distribution of vertical surrounding relatively respectively, aforementioned pilot pin is to pass aforementioned relative first transfer groove and second transfer groove respectively, and is fixed on the surrounding wall of this body.
3. dolly camera as claimed in claim 1, it is characterized in that, aforementioned first, second skewed slot is to intersect with a baseline of parallel this axis respectively, reach with this baseline and be formed with one first angle and one second angle, this first angle is greater than this second angle, makes the slope of the slope of aforementioned second skewed slot less than aforementioned first skewed slot.
4. dolly camera as claimed in claim 1 is characterized in that, this mirror ring has the Jing Bi around this axis, and this eyeglass is to be installed in this mirror pars intramuralis, and aforementioned first spigot is to be positioned at this mirror wall one outer peripheral face after passing aforementioned first skewed slot respectively.
5. dolly camera as claimed in claim 4 is characterized in that, this mirror ring also has most arc grooves that run through this ring wall and distribute around this axis along parallel this axis direction, and passes aforementioned arc groove respectively and be fixed on most limited bolts on this moving part.
6. dolly camera as claimed in claim 5, it is characterized in that, this moving part also has around an internal ring wall of this axis and an external annulus, and be formed on a annular space between this inside and outside ring wall, this first ring wall and this second ring wall are set between this annular space, and aforementioned second spigot is to pass this external annulus respectively and be set in second skewed slot of this second rotating part, and aforementioned limited bolt is to be fixed on this internal ring wall.
7. dolly camera as claimed in claim 1, it is characterized in that, this body has and runs through this surrounding wall and be respectively adjacent to and away from one first window and one second window of this surrounding wall one end, this is first years old, second rotating part have respectively be formed on this first, second ring wall, one inside surface and with respect to one first groove Duan Yuyi, the second groove section of this end, this is first years old, the second groove section be respectively towards this first, second window, this is first years old, second power packages has respectively and is arranged on this intrinsic motor, transmit a deceleration part of this motor power, and with this deceleration part interlock and export a transmission gear of this power, aforementioned transmission gear be respectively with pass this first, second window and with this first, the engagement of the second groove section.
8. dolly camera as claimed in claim 1 is characterized in that, this first power packages is to drive this first rotating part to do the limited angle of circling round.
9. dolly camera as claimed in claim 1, wherein, this second power packages is to drive this second rotating part to do the limited angle of circling round.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100513785A CN100412679C (en) | 2005-03-08 | 2005-03-08 | Extension lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100513785A CN100412679C (en) | 2005-03-08 | 2005-03-08 | Extension lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1831623A CN1831623A (en) | 2006-09-13 |
| CN100412679C true CN100412679C (en) | 2008-08-20 |
Family
ID=36994001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100513785A Expired - Fee Related CN100412679C (en) | 2005-03-08 | 2005-03-08 | Extension lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100412679C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101271185B (en) * | 2007-03-22 | 2010-05-26 | 亚洲光学股份有限公司 | Lens opening method and its control system |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4627691A (en) * | 1979-12-04 | 1986-12-09 | Asahi Kogaku Kogyo Kabushiki Kaisha | Cam grooves for displacing lenses |
| US5867740A (en) * | 1991-05-20 | 1999-02-02 | Asahi Kogaku Kogyo Kabushiki Kaisha | Cam mechanism for lens barrel |
| CN1248710A (en) * | 1998-08-04 | 2000-03-29 | 奥林巴斯光学工业株式会社 | Lens sleeve |
| CN1395126A (en) * | 2001-06-28 | 2003-02-05 | 奥林巴斯光学工业株式会社 | Lens barrel |
-
2005
- 2005-03-08 CN CNB2005100513785A patent/CN100412679C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4627691A (en) * | 1979-12-04 | 1986-12-09 | Asahi Kogaku Kogyo Kabushiki Kaisha | Cam grooves for displacing lenses |
| US5867740A (en) * | 1991-05-20 | 1999-02-02 | Asahi Kogaku Kogyo Kabushiki Kaisha | Cam mechanism for lens barrel |
| CN1248710A (en) * | 1998-08-04 | 2000-03-29 | 奥林巴斯光学工业株式会社 | Lens sleeve |
| CN1395126A (en) * | 2001-06-28 | 2003-02-05 | 奥林巴斯光学工业株式会社 | Lens barrel |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1831623A (en) | 2006-09-13 |
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Granted publication date: 20080820 Termination date: 20100308 |