CN2322160Y - Negative feeder - Google Patents

Negative feeder Download PDF

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Publication number
CN2322160Y
CN2322160Y CN 97209910 CN97209910U CN2322160Y CN 2322160 Y CN2322160 Y CN 2322160Y CN 97209910 CN97209910 CN 97209910 CN 97209910 U CN97209910 U CN 97209910U CN 2322160 Y CN2322160 Y CN 2322160Y
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CN
China
Prior art keywords
sprocket wheel
egative film
gear
perforation
revolution
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Expired - Fee Related
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CN 97209910
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Chinese (zh)
Inventor
千之崎胜章
三木伸哉
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XINPU PRECISION OPTICS CO Ltd
Minolta Co Ltd
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XINPU PRECISION OPTICS CO Ltd
Minolta Co Ltd
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Priority to CN 97209910 priority Critical patent/CN2322160Y/en
Application granted granted Critical
Publication of CN2322160Y publication Critical patent/CN2322160Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model relates to a negative film feeding structure, which is suitable for various specification negative films. Before the negative film is fed at an initial stage, a function lever chains a chain wheel in advance, and cooperates with a gear set with a plurality of teeth, so as to get rid of chains of the function lever when the negative film passes through the function lever. When the negative film is fed at the initial stage, teeth of the chain wheel are engaged with punched holes of the negative film correctly, and the negative film controls a link stopper to feed by the chain wheel. The utility model can prevent a situation that the negative film is mistakenly fed by revolution phase offset of the chain wheel, and the manufacturing cost of a camera is not improved.

Description

The egative film feed arrangement
The egative film feed arrangement of the relevant a kind of camera of the utility model, this egative film feed arrangement use the assigned position at each frame picture or block to form the egative film of a perforation or use all a plurality of perforation to be formed at the egative film of the assigned position of each block with unequal interval.
Tradition is used for the perforation of 35 millimeters egative films, for the edge, long limit along egative film forms eight perforation respectively at each link stopper.Use the camera of this 35 millimeters egative films, usually use can with the sprocket wheel of intermeshing eight teeth of the perforation of egative film.During the feeding egative film, control the feeding of egative film block by the revolution of detecting sprocket wheel.And it need be provided with light blockout device, by calculating eight perforation, so that block of control egative film feeding.
The new spec egative film of releasing on the nearest market, it respectively is provided with a perforation respectively for leading section and the rearward end at each block, and all perforation then are configured on the egative film with unequal interval.When using this egative film, as want to use the feeding of controlling the egative film block as above-mentioned traditional sprocket wheel, even can reach, but its structure will be very complicated, and impracticable.So, using optical detection apparatus such as light blockout device is set on the camera of this new spec egative film usually to control the feeding of egative film block.
But, use the light blockout device mode, not only use chain wheel mode difficulty on making higher, and must set up the subsidiary structure of control circuit or the like, thereby manufacturing cost will be higher.So, the camera that does not use light blockout device is arranged, itself and use camera of 35 millimeters egative films identical, all use a kind of driven feeding egative film, turn round the egative film feed arrangement that freely sprocket wheel is controlled the feeding egative film.The sprocket wheel of this egative film feed arrangement, each block that need be engaged in egative film forms two perforation respectively, and this sprocket is designed to have only two teeth, so that after revolution of chain crop rotation, the egative film block of can advancing, finish week revolution, just block of may command egative film feeding by institute's detecting sprocket wheel.
But, because the sprocket wheel of egative film feed arrangement must be able to turn round voluntarily, so during the feeding egative film, especially during the initial stage feeding, when the position of perforation can not be aimed in the position of the tooth of sprocket wheel, thereby cause the feeding of egative film block that incorrect anxiety is arranged.
Therefore, the purpose of this utility model is the egative film feed arrangement of camera of being arranged to have the egative film of one or more perforation at the assigned position of each block at using, or use in all perforation of each block and form egative film feed arrangement with the camera of the egative film of assigned position with unequal interval, because still by the block feeding that realizes egative film with sprocket wheel, thereby can not improve the manufacturing cost of camera.Simultaneously, owing to taked to prevent the rotating technical measures of sprocket wheel, make sprocket wheel that phase deviation not take place, thereby can make the feeding egative film correct.
The structure of the egative film feed arrangement of camera of the present utility model, be to propose for the defective of certainly separating above-mentioned traditional egative film feed arrangement, it not only can use the sprocket wheel of the number of teeth of perforation number that has being same as or be less than each block of egative film, and the rotating phase place of sprocket wheel can also control the initial stage feeding of egative film the time, when making egative film initial stage feeding, the tooth of sprocket wheel and perforation can be meshed consistent with each otherly.
This egative film feed arrangement possesses for the feeding of control egative film: an egative film that is applicable to that the egative film that will form a perforation at the assigned position of each block maybe is formed at all a plurality of perforation each block assigned position with unequal interval is fed into the drive unit of tack-up spool from box body; Its number of teeth is same as or is less than the sprocket wheel of the perforation number of each block of egative film, but the tooth fit engagement of this sprocket wheel is in this perforation; Before the feeding of the initial stage of egative film, chain revolution restraint device and the feeding interlock with egative film in the initial stage phase place of the rotational phase of sprocket wheel removed the chain chain decontrol of sprocket wheel according to turning round restraint device for one; A rotating arrangement for detecting of detecting sprocket wheel and a control device by the detection signal feed-disabling egative film of this arrangement for detecting.
In the structure of above-mentioned egative film feed arrangement, be provided with one that make in the one mode, have: the revolution control member of revolution restraint device and chain decontrol, and be provided with a retainer that sprocket wheel stop is chain so that constitute this revolution restraint device; Driven and remove the chain chain releasing portion of the stop of sprocket wheel by retainer and then constitute this chain decontrol with passing through of egative film front end.
Again, before drive unit carries out the feeding of egative film initial stage from box body towards tack-up spool, earlier sprocket wheel is interlocked in the initial stage phase place, when the feeding of interlock egative film, just remove the chain of this sprocket wheel by the revolution restraint device.Therefore, when egative film advanced, sprocket was just engageable in perforation, thereby made the sprocket wheel revolution.In addition, turn round really, turn round this sprocket wheel by set drive unit for guaranteeing sprocket wheel.In addition, a clutch coupling is set, this clutch coupling can contact with egative film at the tooth of sprocket wheel and increase when turning round load, and sprocket wheel is slided.
In above structure, the egative film link stopper that at every turn advances, sprocket wheel just returns and circles.Therefore when if the lazy condition of revolution of sprocket wheel can be detected by arrangement for detecting, and stop the feeding of egative film, just can determine inerrably by link stopper feeding egative film by control device.
Therefore, can and have the perforation engagement that unequal interval is provided with each link stopper of perforation, can make this sprocket wheel have the tooth of configuration unequal interval on outer peripheral edges in order to make sprocket wheel.Add by control device, can make the position of egative film, the rotational phase of sprocket wheel and the initial stage feeding concerted action of egative film, thus can be with the block feeding correctly of egative film.Moreover, because this sprocket wheel and revolution restraint device and chain lock decontrol can be used in the feeding of 35 millimeters egative film link stoppers of control, therefore help reducing the manufacturing cost of camera.
In addition, this revolution control member can be made of control lever, the conduct of one end can with the retainer of sprocket engagement.Simultaneously, can be with the releasing portion of the other end as the travel plane of crossing egative film.So, before egative film passes through, can keep the stop of sprocket wheel chain, thereby can keep the predefined initial stage phase place of this sprocket wheel, and after egative film passed through, the stop that can remove sprocket wheel was chain.Because available mechanical simple mechanism is implemented this revolution control member, therefore can not can improve the manufacturing cost of camera.
The utility model provides a kind of egative film feed arrangement, it is applicable to that use is provided with the egative film of a perforation or uses assigned position at each link stopper to form with unequal interval in the camera of egative film of a plurality of perforation at the assigned position of each block, described egative film feed arrangement comprises a sprocket wheel, it is characterized in that:
Described sprocket wheel is arranged at the center of described each gear of camera, and described sprocket wheel is fixedly set in the rotating shaft, and described rotating shaft is can rotating mode propping up described sprocket wheel the body frame that is held in described camera; Being provided with one between sprocket wheel and gear can make described sprocket wheel and transmission gear turn round in the one mode but make described sprocket wheel slide idle running and become the spring of clutch configuration in bigger revolution load; Described egative film feed arrangement also is provided with a control lever, and an end of described control lever has that recess on the boss circumferential lateral surface with described sprocket wheel intermeshes and described sprocket wheel stop is chain and as the retainer of revolution restraint device; Described control lever has can swing and as the pin at center it, described pin is installed near egative film travel plane anterior position, and described control lever also is provided with the direction that is incorporated into retainer and its acting force and makes described retainer and the intermeshing spring of described recess; Another of control lever crossed the egative film travel plane and general plan is outstanding backward end is chain and keep the chain releasing portion of described sprocket wheel in the initial stage phase place as the stop of removing described sprocket wheel;
End in a described device side opposite with described sprocket wheel, be provided with the arrangement for detecting that to detect described sprocket wheel winding number, described arrangement for detecting is made of the detecting plate and the contact pin of being fixed in the body frame, and described arrangement for detecting provides signal so that the feeding of control egative film and stopping according to the revolution of described sprocket wheel to microcomputer.
An aspect of the present utility model provides a kind of egative film feed arrangement, and described egative film feed arrangement also has the revolution control member with described revolution restraint device of the revolution of one mode and chain decontrol; Described revolution restraint device and the mutual continuous cropping of above-mentioned sprocket wheel are constituted by the engaging part of chain described sprocket wheel; Described chain decontrol is removed described sprocket wheel chain by the front end conduct by described engaging part according to egative film, and forms institute of releasing portion constitutor.
Now conjunction with figs., with regard to structure of the present utility model, composition, action, efficacy characteristics, be described in more detail in the back:
Fig. 1 is the synoptic diagram of the employed new spec egative film of camera negative feed arrangement of the present utility model.
Fig. 2 is the signal rear view of the inner structure of use egative film feed arrangement camera of the present utility model;
Fig. 3 is the transverse section top view of the middle body of Fig. 2.
Fig. 4 arranges the plan view of (sprocket wheel is the chain lock state) for the gear that constitutes egative film feed arrangement of the present utility model;
Fig. 5 is for the sprocket wheel of egative film feed arrangement of the present utility model and be the cross section view of coaxial gear structure;
Fig. 6 arranges the plan view of (sprocket wheel is released state) for the gear that constitutes egative film feed arrangement of the present utility model;
Fig. 7 arranges the plan view of the feeding state of the block of having finished egative film for the utility model gear;
Fig. 8 a, 8b are the sprocket wheel of fastener of the present utility model and the cross section view that perforation is in engagement.
Now cooperate Fig. 1 as follows to each embodiment that Fig. 8 describes relevant camera negative feed arrangement of the present utility model in detail:
The type of the employed new spec egative film of the utility model at first, is described.See also Fig. 1, be depicted as the box body KT and the egative film F thereof of the film magazine of the egative film feed arrangement that is used in camera of the present utility model.Frame picture on the egative film F is referred to as block K.One side at the edge, long limit of egative film F at front end and the back-end location place of each block K, is respectively arranged with perforation 1 and 2.Position than the guidance part of the perforation 1 more close egative film of the most previous block of egative film F is provided with another perforation 3.Below each block K, be respectively arranged with for the magnetic recording face 4 of record, so that the information of relevant photographed data is recorded on the magnetic recording face 4 with data.In addition, on the guidance part place of egative film and egative film F, bore a hole 1,2 with edge, 3 residing identical long limit on also be provided with a breach 5.
See also Fig. 2, be depicted as the signal rear view of the inner structure of the camera 10 that adopts egative film feed arrangement of the present utility model, Fig. 3 is the top view in the transverse section of the middle body of Fig. 2.Can see the chamber 11 of enclosing casing KT among the figure, the chamber of the tack-up spool 12 of installing one a scrolling egative film F in it also be arranged at the opposite side of the chamber 11 of enclosing casing KT.The exposure room of camera is then between this two Room.On the travel track of the perforation 1,2,3 of egative film F, be provided with a sprocket wheel 13.This sprocket wheel 13 is arranged at the interior location of sprocket gear 14 of the body frame of camera.
See also Fig. 4, the relevant drive unit that egative film F is fed into tack-up spool 12 from box body KT is shown, egative film is by the motor feeding, this motor is transmitted in the gear row of box body and tack-up spool with driving force, and (this figure simplifies each gear is shown, and represent increment circle with solid line, and, gear and other member, regardless of the upper and lower relation of overlapping member part, all express) with solid line.
Be connected to the driven wheel 20 of the motor output shaft that makes the egative film feeding shown in Fig. 4, this driven wheel 20 and transmission gear 21,22,23,24, engagement in twos in regular turn, i.e. gear 20 meshing gears 21, and gear 21 meshing gears 22, and the like.Those gears 21,22,23,24 are made of large diameter gear 21a, 22a, 23a, 24a and small-diameter gear 21b, 22b, 23b, 24b one respectively, and all gears mesh successively and form reduction gearing row.
Planet wheel 25 of small-diameter gear 24b engagement of gear 24.The central shaft of this planet wheel 25 is connected in semi-girder 26 leading sections that can swing pivotally, makes that this planet wheel 25 can be the outer peripheral edges revolution of center along this gear 24 with the centre of gyration of gear 24.Its semi-girder 26 and gear 24 frictional engagement are so that can be according to the gyratory directions of gear 24 towards swinging; Other is provided with a gear 27, and this gear 27 is the center with the centre of gyration of gear 24, at semi-girder 26 when the counter clockwise rotation direction is swung, this gear 27 can with planet wheel 25 engagements.And this gear 27 and another spool gears 28 with these driven wheel 20 concentric settings mesh, thereby can become the tack-up spool that drives egative film F.Be configured to driven wheel 20 with one heart though be used to drive the spool gears 28 of this tack-up spool, can turn round synchronously with driven wheel 20.
In addition, transmission gear 30 of another and 24 engagements of this gear be configured to a sprocket wheel 13 with in the heart.This gear 30 is gone back and another gear 31 engagements.And this gear 31 is engaged in planet wheel 32 and 33.This planet wheel 32 and 33 are fixed in respectively on the leading section of a V-arrangement arm rotationally, this V-arrangement arm just can this gear 31 the centre of gyration be that swing at the center, and be held in consistent with the gyratory directions of this gear 31, and can be towards the revolution of clockwise gyratory directions or counter-clockwise direction.
Also be provided with a gear 35, so that mesh planet tooth 32 or gear 33 according to the gyratory directions of this gear 31.This gear 35 makes another gear 38 slow down by gear 36 and gear 37.This gear 38 connects one and advances sheet-reviewing gear 40, but this advance sheet-40 of reviewing gears and be arranged to one revolution with the spool engagement of this box body KT so that according to gyratory directions, realize this egative film F advanced sheet or reviewing action.
See also Fig. 5, be depicted as the structure of relevant sprocket wheel 13 and gear 30.This sprocket wheel 13 serves as concentric (engagement of only representing gear 23,24,31) with gear 30, and sprocket wheel 13 is fixed in the rotating shaft 15, and this rotating shaft 15 is then supported this gear 30 thereon rotationally.Then, this rotating shaft 15 is remained on the body frame 16 of camera rotationally.Between sprocket wheel 13 and gear 30, be provided with a spring 17, make both form a kind of clutch configuration.Though this gear 30 and this sprocket wheel 13 turn round in the one mode, when bigger revolution load, this sprocket wheel 13 just can slide (idle running) and not turn round with these gear 30 one.
A control lever 18, it has as the retainer 18a (consulting Fig. 4) that uses of revolution restraint device, and this retainer 18a can intermesh with the recess 13a of the outside circumference of sprocket wheel 13 boss, and it is locked with sprocket wheel 13 and is connected.This control lever 18 is center and can swinging with pin 18b, and this pin 18b then is installed on a position near egative film F travel plane the place ahead (with exposure chamber the place ahead as the egative film travel plane).This control lever is provided with a tension spring 18d, and the pulling force of this spring 18d acts on and makes on the direction that this retainer 18a and recess 13a be meshed, thereby makes this spring 18d this control lever 18 can be pulled to the rear of egative film F travel plane.This control lever 18 is crossed the slightly rearward outstanding position of this egative film F travel plane an interlock releasing 18c of portion, this interlock releasing 18c of portion can remove the engagement of the recess on the boss of retainer 18a and sprocket wheel 13, and then the state of the initial stage phase place before the egative film initial stage feeding that sprocket wheel 13 can often be remained on do not remove under the chain state.
The end of rotating shaft 15 opposition sides that become one with this sprocket wheel 13 is provided with the arrangement for detecting 19 of the winding number of this sprocket wheel 13 of detecting.This arrangement for detecting 19 is made of detecting plate 19a that is fixed in axle 15 and the contact pin 19b that is fixed in body frame 16 sides.This arrangement for detecting 19 is once closed circuit for detecting once according to these sprocket wheel 13 every revolutions, so that arrangement for detecting provides signal to microcomputer.
When feeding egative film F, by starter motor driven wheel 20 is turned round towards counter-clockwise direction, each gear of said structure in Fig. 4 just turns round, and passes to gear 24 by gear 21,22 and 23 revolutions with driven wheel 20, and this gear 24 is also turned round towards counter-clockwise direction.Along with the revolution of this gear 24 makes planet wheel 25 and gear 27 engagements, and the revolution of gear 24 is passed to spool gears 28, therefore can allow this spool gears 28 turn round toward the clockwise direction, that is, on the direction of this egative film of coiling F, turn round.
The revolution of this gear 24 also can pass to gear 30.But this moment, because control lever 18 is chain state with sprocket wheel 13, so this sprocket wheel 13 can not turn round, that is sprocket wheel 13 still remains in the state of initial stage phase place.And turn round towards counter-clockwise direction owing to gear 31 this moment, and therefore, planet wheel 32 and gear 35 are meshing with each other and make this gear 35 towards counter clockwise rotation.Event, the revolution of this gear 35 relend and help gear 36,37,38 and 39 to pass to feeding sheet-reviewing gear 40, and this gear 40 is revolution toward the clockwise direction then, that is turns round egative film F from box body KT towards releasing direction.
If motor continues revolution again, the 18c of releasing portion of this control lever 18 of front end pushing tow of egative film F advances forward, is center swing slightly toward the clockwise direction thereby make the elastic force of control lever 18 antagonism spring 18d with pin 18b.So the retainer 18a of this control lever 18 just recess 13a on the boss side surfaces of sprocket wheel 13 breaks away from, make this sprocket wheel 13 begin revolution simultaneously.Though the front end of egative film F advances towards left-hand shape again, because the also revolution simultaneously of this this sprocket wheel 13, because of the tooth 13c of this sprocket wheel 13 can not contact with the front edge of egative film F.When this sprocket wheel 13 returned back to appropriate location (position shown in Figure 6), gear 13b just contacted with egative film F.At this moment because and perforation 1,2 and 3 at the breach 5 of the guidance part of the egative film F at edge, same long limit through the position of the tooth 13b of logical sprocket wheel 13, so egative film F can engaging tooth 13b or 13c.
At this moment, though continue the feeding egative film again, because tooth 13b contacts with egative film F, so sprocket wheel 13 temporarily do not turn round, and remains on the position of its halted state, i.e. position as shown in Figure 6.Then, when this egative film F being fed into when being positioned at the most preceding perforation 3, this tooth 13b promptly enters in this perforation 3, drives this sprocket wheel 13 revolutions.And being fed into perforation 1 the time as this egative film F, the tooth 13c of this sprocket wheel 13 just as shown in Figure 7 state enters into this perforation 1.At this moment, can detect and learn that by the arrangement for detecting 19 that is installed in 15 end sprocket wheel 13 is just from initial stage phase place revolution situation once, so motor just stops no longer feeding egative film F.So, just can finish the initial stage feeding of egative film F, the location of finishing first block by above-mentioned action.
Thereafter, in regular turn with a block feeding egative film F time, revolution by motor equidirectional towards the time as the initial stage feeding, to make spool gears 23 respectively and advance sheet-reviewing gear 40 and turn round toward the clockwise direction, just can make tooth 13c along with the action of egative film F breaks away from engagement with perforation 1, this sprocket wheel 13 promptly turns round toward the clockwise direction and gets back to as shown in Figure 6 position.Thereafter, this feed arrangement again with egative film F initial stage feeding the time identical mode move.When this sprocket wheel 13 was in as shown in Figure 7 state once again, motor promptly stopped automatically, so finish another block feeding of egative film F again.
If during existing reverse feeding egative film F, can rotate, can turn round this spool gears 28 and advance sheet-reviewing gear 40 towards counter-clockwise direction, just can make egative film F towards Fig. 4,6 and 7 right-hand advancing by motor court and above-mentioned opposite direction.At this moment, this sprocket wheel 13 breaks away from engagement with perforation 1 along with the action of egative film makes tooth 13c, and after the engagement that breaks away from through gear 13b with perforation 2, this sprocket wheel 13 continues towards perforation 1 engagement of counter-clockwise direction revolution until tooth 13c and egative film F.
Then, be in feeding egative film F under the state that temporarily stops operating at sprocket wheel 13.Again, when tooth 13c and perforation 1 engagement, this arrangement for detecting 19 also can be detected the situation of learning this phase backward feed one block egative film.Therefore, the structure of egative film feed arrangement of the present utility model also all twists in spool then with the block pre-rolling camera of backrush in the box body KT one by one applicable to the sort of elder generation with egative film.In addition, during with the camera rollback egative film of common roll film mode, can be redefined for each block of great-jump-forward ground detecting.
As mentioned above, in the structure of above-mentioned egative film feed arrangement, from box body KT to tack-up spool before 12 the egative film F initial stage feeding, can be sprocket wheel 13 is chain as the initial stage phase place by the retainer 18a of the control lever of installing as the revolution restraint device 18, so that when the releasing portion 18c of egative film F by control lever 18, remove just that it is chain.Therefore, shown in Fig. 8 a, the tooth 13b of this sprocket wheel 13 can be engaged in really perforation 2 or 3, or tooth 13c is engaged in perforation 1, can correctly be controlled the block feeding of egative film F.In addition, if give to control in advance sprocket wheel 13 rotating positions by this way, promptly shown in Fig. 8 b, tooth 13b and perforation 1 engagement are just have the effect of the correct feeding egative film of block F one by one.
Therefore,, can use the sprocket wheel 13 that has with each block perforation similar number tooth 13b, 13c, the rotational phase of the sprocket wheel 13 when fitting into the control lever 18 control egative film F initial stage feedings to egative film according to the structure of above-mentioned egative film feed arrangement.Therefore, can get simple structure, can be correctly with block feeding egative film F.And,, therefore can not can improve the manufacturing cost of camera owing to implement the revolution of sprocket wheel 13 is controlled with this simple constitutional detail.
In addition, the utility model also can be engaged in the traditional egative film feed arrangement that uses this pattern egative film camera, because traditional egative film feed arrangement uses light blockout device to implement the block detecting of egative film F with electric means, so block number of egative film F, though represent with the electric counter that uses liquid crystal indicator etc., or the transform electric of light blockout device represented with mechanical counter for the action of machinery, but as long as according to said structure of the present utility model, the block digital display that axle 15 can be directly connected in mechanical counter enforcement egative film F shows, therefore can reach the manufacturing cost that reduces camera.
Therefore, the structure of above-mentioned egative film feed arrangement though be suitable for the new spec egative film that has two perforation with each block, also can be used the egative film that forms a perforation at the assigned position of each link stopper.Or when the assigned position of each block forms the egative film of perforation more than three with unequal interval, the perforation number and the position that can cooperate each block K still by the number of teeth and position with sprocket wheel 13, and can be in response to being suitable for.In the above-described embodiments, though be arranged to have the egative film of two perforation and use sprocket wheel, also can use the number of teeth to be less than to bore a hole the sprocket wheel of number with two teeth according to each block.At this moment, by the rotational phase of taking sprocket wheel and egative film front end synchronously, and can avoid sprocket to be engaged in the breach of egative film front end.
In sum, the utility model is the mechanism to simplify really, and the feeding of may command egative film, thereby can reduce the manufacturing cost of camera, and its manufacturings is simple and easy, and applicable to multiple camera, egative film specification, so have the effect that practicality also can be promoted camera.

Claims (1)

1. egative film feed arrangement, be applicable to that use is provided with the egative film of a perforation or uses assigned position at each link stopper to form with unequal interval in the camera of egative film of a plurality of perforation at the assigned position of each block, described egative film feed arrangement comprises a sprocket wheel, it is characterized in that:
Described sprocket wheel is arranged at the center of described each gear of camera, and described sprocket wheel is fixedly set in the rotating shaft, and described rotating shaft is can rotating mode propping up described sprocket wheel the body frame that is held in described camera; Being provided with one between sprocket wheel and gear can make described sprocket wheel and transmission gear turn round in the one mode but make described sprocket wheel slide idle running and become the spring of clutch configuration in bigger revolution load; Described egative film feed arrangement also is provided with a control lever, and an end of described control lever has that recess on the boss circumferential lateral surface with described sprocket wheel intermeshes and described sprocket wheel stop is chain and as the retainer of revolution restraint device; Described control lever has can swing and as the pin at center it, described pin is installed near egative film travel plane anterior position, and described control lever also is provided with the direction that is incorporated into retainer and its acting force and makes described retainer and the intermeshing spring of described recess; Another of control lever crossed the egative film travel plane and general plan is outstanding backward end is chain and keep the chain releasing portion of described sprocket wheel in the initial stage phase place as the stop of removing described sprocket wheel; End in a described device side opposite with described sprocket wheel, be provided with the arrangement for detecting that to detect described sprocket wheel winding number, described arrangement for detecting is made of the detecting plate and the contact pin of being fixed in the body frame, and described arrangement for detecting provides signal so that the feeding of control egative film and stopping according to the revolution of described sprocket wheel to microcomputer.
CN 97209910 1997-01-20 1997-01-20 Negative feeder Expired - Fee Related CN2322160Y (en)

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Application Number Priority Date Filing Date Title
CN 97209910 CN2322160Y (en) 1997-01-20 1997-01-20 Negative feeder

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Application Number Priority Date Filing Date Title
CN 97209910 CN2322160Y (en) 1997-01-20 1997-01-20 Negative feeder

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CN2322160Y true CN2322160Y (en) 1999-06-02

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Application Number Title Priority Date Filing Date
CN 97209910 Expired - Fee Related CN2322160Y (en) 1997-01-20 1997-01-20 Negative feeder

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