CN2844953Y

CN2844953Y - Turnable collecting lenses

Info

Publication number: CN2844953Y
Application number: CN200520106829.6U
Authority: CN
Inventors: 吴瑞德
Original assignee: Asia Optical Co Inc
Current assignee: Asia Optical Co Inc
Priority date: 2005-08-24
Filing date: 2005-08-24
Publication date: 2006-12-06
Anticipated expiration: 2015-08-24

Abstract

The utility model provides a turnable collecting lens group, which comprises a first, a second and a third lens groups which form an image pickup device, wherein the third lens group comprises an outer frame of the third lens group moving along an optical shaft, an inner frame for supporting the third lens group and a drive part which drives the outer frame to move along the optical shaft or drives the inner frame to rotate along a rotating shaft vertical to the optical shaft. When the turnable collecting lens group is in the picking-up state, the drive part drives the outer frame to move along the optical shaft and further drives the inner frame for supporting the third lens group to move along the optical shaft. When the turnable collecting lens group is in non picking-up state, the drive part drives the inner frame to rotate along the rotating shaft vertical to the optical shaft; further, the third lens group turns over to the outside of the optical shaft and is positioned at one side of the first and the second lens groups.

Description

The turning lens group of taking in

Technical field

The utility model relates to a kind of turning lens group of taking in, particularly a kind of making near the lens combination of imaging end along axis movement and around the turning accommodating mechanism of the rotation axis flip-flop movement of vertical optical axis.

Background technology

Scalable photography (imaging) camera lens of optical devices such as digital camera all belongs to zoom lens usually, promptly by many arrangements of mirrors group toward each other the change of position reach the purpose of zoom.This class camera lens fuselage of can withdrawing fully when optical devices cut out then stretches out fuselage when opening, therefore for the bigger fixedly zoom lens of volume, it has frivolous, portable advantage.In known scalable phtographic lens, wherein one or more groups movably mirror group only can move along the direction of camera axis.Yet this kind retractable lens is after withdrawal, and therefore its length can not also can't further reduce the thickness of fuselage less than the gross thickness of all optical elements.

In view of this, a day disclosure communique spy opens flat 07-199019, discloses a kind of lens barrel that shortens lens length.Fig. 1 and be that summary represents to be exposed in the known lens barrel that the spy opens flat 07-199019.In Fig. 1, when camera lens during in contraction state, internal conversion lens 11 can turn to internal conversion lens 11 with the rotating shaft of vertical optical axis a side of the 2nd lens 5 away from optical axis.Fig. 2 A is that summary represents that this known lens barrel is in the sectional view of wide angle shot state; Fig. 2 B is that summary represents that this known lens barrel is arranged in the sectional view of focus shooting state; Fig. 2 C is that summary represents that this known lens barrel is positioned at the sectional view of long focus shooting state.These internal conversion lens 11 can turn on the optical axis with the rotating shaft of vertical optical axis, and between the 1st lens 1 and the 2nd lens 5.Yet, when shooting state, insert or shift out these internal conversion lens 11 and can cause image temporarily to interrupt; And when this internal conversion lens 11 insert between the 1st lens 1 and the 2nd lens 5, must aim at the light shaft coaxle of the 1st lens the 1, the 2nd lens 5, the grip part 12b that grips these internal conversion lens 11 as if failing to make it coaxial, will cause filmed image to blur when operation.

So, for overcoming the defective that above-mentioned known skill exists, being necessary to provide a kind of optical element accommodating mechanism of innovation, it can reduce the length and the thickness of extension type optical devices, and reaching frivolous, short and small purpose, and it is simple in structure, assembling is easy.

The utility model content

Fundamental purpose of the present utility model is to provide a kind of turning lens group and method for turning thereof taken in.When camera head during in filmed image, the lens combination of contiguous imaging end moves on optical axis so that focusing; When camera head during in heavy trunk state, the lens combination of contiguous imaging end is accommodated in outside the optical axis around the rotating shaft upset vertical with optical axis.Thereby make retractable lens system short and small, compact conformation of size when advanced position.

Another purpose of the present utility model is to provide a kind of lens focus and can be around the upset accommodating mechanism of lens combination to optical axis of the contiguous imaging end of rotating shaft upset of vertical optical axis can regulated simultaneously, and its one-piece construction is simple, it is easy to assemble.

Another purpose of the present utility model is to provide a kind of turning camera head of taking in lens group that has, and it can stretch out or take in lens group as required, and when receiving state, short and small, the compact conformation of the size of camera head.

The turning lens group of taking in that provides according to the purpose of the utility model, from thing end to imaging end comprise first lens combination of moving along optical axis direction, along optical axis direction move and can be around second lens combination of the rotating shaft upset of vertical optical axis, drive this second lens combination and move and the drive division of upset around the shaft and the base of carrying drive division along optical axis direction.Wherein, when the shot object image, first lens combination and second lens combination are positioned on the optical axis, and by drive division drive second lens combination along axis movement so that focus; When shot object image not, drive of the rotating shaft upset of second lens combination by drive division around vertical optical axis, make second lens combination away from optical axis and be positioned at a side of first lens combination.

According to the above, this second lens combination comprises and moves frame, one second lens combination, an inside casing of fixing this second lens combination and a torsion spring.One edge of this mobile frame has platform, platform have along optical axis direction run through one first the perforation and the vertical optical axis direction run through one second the perforation.This inside casing extends at least one support arm from the frame wall, and in the terminal pivot that forms vertical this support arm of this support arm; After pivot passed this torsion spring and inserts this perforation and grip by this perforation, inside casing can rotate around the axis direction of pivot.Second lens combination comprises lens at least, and is fixed on the inside casing.

According to the above, this drive division comprises a motor, with the engagement of this motor and be installed in the gear set of base, the lead screw that combines with this gear set, lead screw is placed in wherein stage clip and and the stopper nut of lead screw threaded engagement.One end of lead screw is with after the gear set on being installed in base combines, and first perforation and the stopper nut with the platform of stage clip, mobile frame is inserted in lead screw successively.In the utility model, utilize stage clip and the stopper nut can be with the platform pinching of mobile frame in wherein; Further, when the motor driven gear set and be passed to after lead screw rotates, the mobile frame platform of pinching between stopper nut and stage clip will move and move because of the rotation of stopper nut.

According to the above, this base has a track-frame, and this track-frame combines along optical axis direction and base are vertical, and perhaps, base is one-body molded and vertical each other with track-frame.In addition, an edge of track-frame has along what optical axis direction extended and directly advances ditch; The guide screw leverage is perpendicular to base, and the one end is fixed in track-frame and the other end is fixed in base.The stopper nut has a teat, and after stopper nut and lead screw be spirally connected, the teat system of stopper nut was sticked in directly to advance in the ditch; When lead screw rotated, track-frame restriction stopper nut moved and can not rotate along optical axis direction.

According to the above, base has projection, and this projection has a track plane, and wherein an end of track plane is parallel with base and the other end is vertical with base, and connects two ends by an arcwall face.Inside casing has a cam bit, and this cam bit cardinal principle and track plane butt.The stopper nut has an oppression department, and the framework butt of this oppression department and this inside casing.When the distance between stopper nut and the base is higher than a set height H, the framework of this inside casing of oppression department butt of this stopper nut, and frame is moved in this stopper nut and stage clip pinching; Therefore, via the gear set transmission, the motor driven lead screw rotates, by the stopper nut and stage clip drives mobile frame and inside casing moves along optical axis direction.When the distance between stopper nut and the base was lower than this set height H, the oppression department of this stopper nut was oppressed the framework of this inside casing in optical axis direction; When lead screw continue to drive the stopper nut when the base direction is moved, the cam bit butt of inside casing track plane, and from a track plane end parallel with base, slides into a track plane end vertical with base along arcwall face.Side by side, the stopper nut continues to drive mobile frame towards the motion of base direction with stage clip, and the pivot of the inside casing that grips by the perforation of mobile frame drives the axis direction upset of inside casing with pivot.Further, the frame planar inverted of initial vertical with optical axis inside casing is to optical axis.

According to the above, this base has a hole, in establish the image capturing element.

According to the above, this second lens combination also comprises a low pass filter.

According to the above, this platform has one the 3rd perforation that runs through along optical axis direction; A main shaft parallel with optical axis direction passes the 3rd perforation, and fixes this main shaft by track-frame.In addition, base has the countershaft that extends setting along optical axis direction; In another edge of mobile frame, the mobile circle limit as selecting to oppose with the edge with platform has a grip part and utilizes this grip part that countershaft is entangled.By this, this moves the guide that frame stably moves along optical axis direction by main shaft, countershaft conduct.

According to the above, this torsion spring has a pair of support tip, and a support tip is fixed in inside casing and another support tip is fixed in mobile frame.When the frame plane of inside casing was vertical with optical axis, this was a maximal value to the angle between the support tip; When the frame planar inverted of inside casing was to optical axis, torsion spring is subjected to twist compression made this to the angle generation minimum value between the support tip.

Description of drawings

Below by most preferred embodiment and accompanying drawing image sensing component of the present utility model is elaborated, in the accompanying drawing:

Fig. 1 is that summary represents to be exposed in the known lens barrel that the spy opens flat 07-199019;

Fig. 2 A is that summary represents that this known lens barrel is in the sectional view of wide angle shot state;

Fig. 2 B is that summary represents that this known lens barrel is arranged in the sectional view of focus shooting state;

Fig. 2 C is that summary represents that this known lens barrel is positioned at the sectional view of long focus shooting state;

Fig. 3 is that summary is represented the turning exploded view of taking in lens group of the present utility model;

Fig. 4 is that summary is represented the turning base of lens group and the exploded view of the 3rd lens combination taken in of the present utility model;

Fig. 5 is the stereographic map after summary is represented drive division and the 3rd lens combination is combined;

Fig. 6 is the local amplification stereogram that summary is represented this base;

Fig. 7 A and Fig. 7 B system represent the stereographic map of this base with different angles;

Fig. 8 is that summary is represented the motion diagram that mobile frame moves along optical axis direction;

Fig. 9 is that summary is represented the upright figure of group that torsion spring combines with inside casing and mobile frame;

Figure 10 is the torsion spring action diagram that summary is represented the inside casing switching process.

Embodiment

Fig. 3 is that summary is represented the turning exploded view of taking in lens group of the present utility model.Consult Fig. 3, be installed in respectively directly to advance tube 40 and be inserted in again in the operation tube 50, change the function that distance between the 1st lens drum 20 and the 2nd lens drum 30 reaches zoom by the rotational motion of operation tins 50 near the 1st lens drum 20 of subject end and the 2nd lens drum 30.After operation tube 50 was installed in guide barrel 60, guide barrel 60 refills to be located in the revolving drum 70; Afterwards, revolving drum 70 places in the stationary magazine creel 80, and stationary magazine creel 80 combines with base 90 again.On periphery outside the revolving drum 70 close imaging surfaces, formative gear 71 and external teeth wheels (indicating) engagement.Behind a motor (indicating) driving external teeth wheels, revolving drum 70 produces gyration along optical axis OA direction in the space of stationary magazine creel 80 and base 90; Then, revolving drum 70 sees through case inner core 60 and is passed to operation tube 50, makes operation tube 50 produce gyration along optical axis OA direction in case inner core 60.Operation tube 50 drives the 1st lens drum 20 and the 2nd lens drum 30 produces rectilinear motion along optical axis direction; By this, the distance between the 1st lens drum 20 and the 2nd lens drum 30 changes and reaches the function of zoom.On base 90, have along optical axis OA direction and move and can be, and drive the 3rd lens combination 91 and move and the drive division 92 of upset around the shaft along optical axis OA direction around the 3rd lens combination 91 of the rotating shaft of vertical optical axis OA upset.

Fig. 4 is that summary is represented the turning base of lens group and the exploded view of the 3rd lens combination taken in of the present utility model.Consult Fig. 4, the 3rd lens combination 91 contiguous imaging surfaces make the imaging surface position remain on the CCD (not indicating) in order to regulate the back focal length.The 3rd lens combination 91 comprises mobile frame 911, one the 3rd lens combination 912, an inside casing 913 of fixing the 3rd lens combination 912 and a torsion spring 914 that moves along optical axis OA direction.When the shot object image,, make inside casing 913 do rectilinear motion along optical axis OA direction by mobile frame 911 carrying inside casings 913.

In the embodiment of the utility model, mobile frame 911 has four

frame

911A, 911B, 911C, 911D limit, wherein an edge 911A has the platform 9112 that extends perpendicular to the footpath direction of optical axis OA, and this platform 9112 has one first perforation, 9113,1 second perforation 9114 that runs through along optical axis OA direction.In addition, in this edge, other has one the 3rd perforation 9115 that vertical optical axis OA direction runs through.This inside casing 913 also has frame wall 9131, extends at least one support arm 9132 from the frame wall, and in these support arm 9132 terminal pivots 9133 that form vertical this support arm; After pivot 9133 passed this torsion spring 914 and inserts the 3rd perforation 9115 and grip by the 3rd perforation 9115, inside casing 913 can rotate around the axis direction of pivot 9133.In the specific implementation method of the utility model, pivot 9133 has an axis hole, and provides a rotating shaft 9135 to pass the 3rd perforation 9115 and pivot 9133.In addition, pivot 9133 and rotating shaft 9135 also can be one.The 3rd lens combination 912 comprises a lens 912A at least, and is fixed on the inside casing 913.In other words, when the shot object image, inside casing 913 can not rotate around the axis direction of pivot 9133, and inside casing 913 can be done rectilinear motion in optical axis OA direction by mobile frame 911.Therefore, when the shot object image, the support arm 9132 of inside casing 913 is vertical with optical axis OA substantially.

Fig. 5 system is the stereographic map after summary is represented drive division and the 3rd lens combination is combined.Consult Fig. 4 and Fig. 5, drive division 93 comprises a motor 931, with 931 engagements of this motor and be installed in the gear set 935 of base 92, the lead screw 933 that combines with this gear set 935, lead screw 933 is placed in wherein stage clip 934 and and the stopper nut 932 of lead screw 933 threaded engagement.One end of lead screw 933 is with after gear set 935 on being installed in base 92 combines, and first perforation 9113 and the stopper nut 932 with the platform 9112 of stage clip 934, mobile frame 911 is inserted in lead screw 933 successively.In the embodiment of the utility model, utilize stage clip 934 and the stopper nut 932 can be with platform 9112 pinchings of mobile frame 911 in wherein; Further, when motor 931 drive gear set 935 and be passed to after lead screw 933 rotates, mobile frame 911 platforms 9112 of pinching between stopper nut 932 and stage clip 934 will move and move along optical axis OA direction because of the rotation of stopper nut 932.

Fig. 6 is the local amplification stereogram that summary is represented this base.Consult Fig. 4, Fig. 5 and Fig. 6, have a track-frame 921 on the base 92, this track-frame 921 is along optical axis OA direction and base 92 vertical combinations, and perhaps, base 92 is one-body molded and vertical each other with track-frame 921.In addition, an edge of track-frame 921 has along what optical axis direction extended and directly advances ditch 9211; Lead screw 933 is perpendicular to base 92, and the one end combines with track-frame 921 and the other end combines with base 92.Stopper nut 932 has a teat 9321, and after stopper nut 932 connect with lead screw spiral shell 933, the teat 9321 of stopper nut 932 was to be sticked in directly to advance in the ditch 9211; When lead screw 933 rotated, track-frame 921 restriction stopper nuts 932 were done rectilinear motion and can not be rotated along optical axis OA direction.

Fig. 7 A and Fig. 7 B system represent the stereographic map of this base with different angles.Consult Fig. 4, Fig. 7 A and Fig. 7 B, base 92 has projection 923, and this projection 923 has a track plane 9231, and wherein one of track plane 9231 end is parallel with base and the other end is vertical with base, and connects two ends by an arcwall face 9231A.Inside casing 913 has a cam bit 9134, and these cam bit 9134 cardinal principles and track plane 9231 butts.Stopper nut 932 has an oppression department 9322, and framework 9131 butts of this oppression department 9322 and this inside casing 913.When the distance between stopper nut 932 and the base 92 is higher than a set height H, the framework 9131 of this inside casing 913 of oppression department 9322 butts of this stopper nut 932, and this stopper nut 932 moves frame 911 with stage clip 934 pinchings; Therefore, transmit via gear set 935, motor 931 drives lead screws 933 and rotates, by stopper nut 932 and stage clip 934 drives mobile frames 911 and inside casing 913 moves along optical axis OA direction.When the distance between stopper nut 932 and the base 92 was lower than this set height H, the oppression department 9322 of this stopper nut 932 was oppressed the framework 9131 of this inside casing 913 in optical axis OA direction; When lead screw 933 continues to drive stopper nut 932 when base 92 directions are moved, cam bit 9134 butts of inside casing 913 track plane 9231, and, slide into track plane 9231 an end 9231C vertical with base along arcwall face 9231A from track plane 9231 an end 9231B parallel with base.Side by side, stopper nut 932 continues to drive mobile frame 911 with stage clip 934 and moves towards base 92 directions, and the

pivot

9133,9134 of the inside casing 913 that grips by the perforation 9115 of mobile frame 911 drives the axis direction upset of inside casing 913 with pivot 9133,9134.Further, the frame planar inverted of initial vertical with optical axis OA inside casing 913 is to optical axis OA; At this moment, the frame plane of the frame plane system of inside casing 913 and mobile frame 911 quadrature each other.On the contrary, inside casing 913 also can overturn outside optical axis OA, make inside casing 913 the frame plane substantially and the frame plane parallel of mobile frame 911; At this moment, the 3rd lens combination the 912, the 1st lens drum 20 and the 2nd lens drum 30 and optical axis alignment, but and formation shooting state.

Fig. 8 is that summary is represented the motion diagram that mobile frame moves along optical axis direction.Consult Fig. 4 and Fig. 8, this platform 9112 has one second perforation 9114 that runs through along optical axis OA direction; A main shaft 936 parallel with optical axis OA direction passes second perforation 9114, and fixes this main shaft 936 by track-frame 921.In addition, base 92 has the countershaft 922 that extends setting along optical axis OA direction; In another edge of mobile frame 911, the mobile circle limit 911B as selecting to oppose with the edge 911A with platform 9112 has a grip part 9116 and utilizes this grip part 9116 that countershaft 922 is entangled.By this, this moves the guide that frame 911 stably moves along optical axis OA direction by main shaft 936, countershaft 922 conducts.

Fig. 9 is that summary is represented the upright figure of group that torsion spring combines with inside casing and mobile frame.Figure 10 is the torsion spring action diagram that summary is represented the inside casing switching process.Consult Fig. 9 and Figure 10, this torsion spring 914 has that a pair of support tip 9141,9142, one support tip 9141 are fixed in inside casing 913 and another support tip 9142 is fixed in mobile frame 911.When the frame plane of inside casing 913 was vertical with optical axis OA, this was a maximal value to the angle theta between the support tip 9141,9142; When the frame planar inverted of inside casing 913 was to optical axis OA, torsion spring 914 is subjected to twist compression made this to the angle theta generation minimum value between the support tip 9141,9142.

Consult Fig. 4, in the specific implementation method of the utility model, the 3rd lens combination 912 comprises an at least one lens 912A and a low pass filter 912B successively from the object side.When shot object image not, drive of the rotating shaft upset of the 3rd lens combination 91 by drive division 93 around vertical optical axis OA, make the 3rd lens combination 91 away from optical axis OA and be positioned at a side of the 1st, the 2nd lens drum 20,30.Optical axis OA is outer to be contained owing to the low pass filter 912B that is close to the imaging end also turn to; Therefore, the utility model can further reach the effect that shortens lens length.

Consult Fig. 4, in the specific implementation method of the utility model, base 92 has a peristome 924, feels concerned about with the optical axis OA of the 1st, the

2nd lens drum

20,30 coaxial among this peristome 924.Image acquisition unit is embedded in this peristome 924 as CCD or cmos element system.

The utility model not only may be used on scalable zoom lens, and may be used on telescopic universal focus lens.Use or not during user mode when being in, its lens drum stretches out or bounces back in the fuselage from fuselage respectively.

The turning lens group of taking in of the present utility model is not only capable of being combined in the digital still camera as present embodiment, also capable of being combined in other optical devices.

In sum, the utility model has really met the important document of utility model patent, therefore proposes patented claim in accordance with the law.But discussed above only is the better embodiment of the utility model, and every personage who is familiar with this case technology helps the equivalence of doing according to the spirit of the utility model and modifies or variation, all is covered by in the accompanying Claim.

Claims

1. turning lens group of taking in, comprise a plurality of lens combination successively from subject end to imaging end, when this is turning when taking in lens group in shooting state, these lens combination systems are positioned on the optical axis, it is characterized in that: when this is turning when taking in lens group in non-shooting state, the lens combination of contiguous imaging end turn to outside the optical axis with the rotating shaft perpendicular to optical axis, and these remaining lens combination move towards the imaging end simultaneously.

2. the turning lens group of taking in as claimed in claim 1 is characterized in that: this turning lens group of taking in also comprises:

One drive division, when shooting state, this lens combination that drives contiguous imaging end is moved along optical axis direction, and when non-shooting state, drives the rotating shaft upset of this lens combination of contiguous imaging end around vertical optical axis; And

One base, this lens combination of carrying this drive division and contiguous imaging end.

3. the turning lens group of taking in as claimed in claim 2 is characterized in that: this lens combination of contiguous imaging end comprises:

At least one lens, contiguous imaging end is provided with;

One moves frame, and this edge that moves frame has platform, platform have along optical axis direction run through one first the perforation and the vertical optical axis direction run through one second the perforation;

One inside casing, fixing this at least one lens, and this inside casing extends at least one support arm from the frame wall, and in the terminal vertically pivot of this support arm that forms of this support arm; And

One torsion spring has a pair of support tip, and wherein a support tip is fixed in inside casing and another support tip is fixed in mobile frame, and makes pivot pass wherein the back to insert in this second perforation.

4. the turning lens group of taking in as claimed in claim 3, it is characterized in that: this drive division comprises

One motor;

One gear set meshes and is installed in base with this motor;

One lead screw, the one end combines with this gear set on being installed in base, makes the motor driven lead screw rotate via this gear set transmission;

One stage clip is placed in lead screw wherein; And

One stopper nut successively after stage clip, mobile frame are inserted in lead screw, again with this lead screw threaded engagement, utilizes stage clip and the stopper nut can be with the platform pinching of mobile frame in wherein whereby.

5. the turning lens group of taking in as claimed in claim 4, it is characterized in that: this base comprises:

One track-frame, it vertically combines and the other end of fixing above-mentioned lead screw along optical axis direction and base, and an edge of track-frame has along what optical axis direction extended and directly advances ditch; And

One projection, it has a track plane, and wherein an end of this track plane is parallel with base and the other end is vertical with base, and connects two ends by an arcwall face;

Lead screw is perpendicular to base, and the one end is fixed in track-frame and the other end is fixed in base.

6. the turning lens group of taking in as claimed in claim 5, it is characterized in that: this stopper nut has a teat, and be sticked in directly to advance in the ditch by this teat, when lead screw rotated, track-frame restriction stopper nut moved and can not rotate along optical axis direction.

7. the turning lens group of taking in as claimed in claim 5, it is characterized in that: when the distance between stopper nut and the base is higher than a set height H, the framework of this inside casing of oppression department butt of this stopper nut, and frame is moved in this stopper nut and stage clip pinching, therefore via the gear set transmission, the motor driven lead screw rotates, and drives mobile frame and inside casing moves along optical axis direction by stopper nut and stage clip; When the distance between stopper nut and the base was lower than this set height H, the oppression department of this stopper nut was oppressed the framework of this inside casing in optical axis direction; When lead screw continues to drive the stopper nut when the base direction is moved, the cam bit butt of inside casing track plane, and from a track plane end parallel with base, slide into a track plane end vertical along arcwall face with base, side by side, the stopper nut continues to drive mobile frame towards the motion of base direction with stage clip, and the pivot of the inside casing that grips by the perforation of mobile frame, drive the axis direction upset of inside casing with pivot, the frame planar inverted of the feasible initially inside casing vertical with optical axis is to optical axis.

8. the turning lens group of taking in as claimed in claim 5 is characterized in that: this platform also comprises one the 3rd perforation that runs through along optical axis direction; And this drive division also comprises a main shaft, and is parallel with optical axis direction and pass the 3rd perforation, and fixes this main shaft by this track-frame, makes mobile frame stably move along optical axis direction.

9. the turning lens group of taking in as claimed in claim 8 is characterized in that: this base also comprises a countershaft that extends setting along optical axis direction; And this mobile frame also comprises a grip part, is positioned at the mobile circle limit with the edge opposition with platform, by this grip part countershaft entangled, and makes mobile frame stably to move along optical axis direction.

10. the turning lens group of taking in as claimed in claim 3, it is characterized in that: this lens combination also comprises an optical filter, between these at least one lens and imaging end, and is fixed on the inside casing.