CN85200990U - Driving unit of single-lens exchangeable reflex camera - Google Patents

Abstract

The utility model discloses a linkage mechanism suitable for the single-lens reflex camera, comprising a gear mechanism used for film winding, an aperture automatically retracting mechanism and a shutter releasing mechanism. The two sets of gears of the gear mechanism are mutually engaged and drive the film winding axle to conduct film winding by the film winding gear on the film winding axle. An aperture shutter driving ring, a shutter releasing lever and a shutter tightening handle are respectively driven by a connecting rod driven by a cam wheel, another shutter releasing element and a tightening catch plate to open or release the aperture and the shutter. Two sets of positioning elements respectively limit the film stopping position of the rocking handle of the camera or lock the driving plate of a shutter button.

Description

Driving unit of single-lens exchangeable reflex camera

The invention belongs to the gear train of camera.

The employed shutter of original Single-sens reflex camera generally is divided into three kinds, that is: between-lens shutter, curtain shutter and reflector shutter.Between-lens shutter has the fast advantage of flash synchronization, but complex structure costs an arm and a leg.The curtain shutter exposure is even, the shutter speed height, but flash synchronization speed is low, and the reflector shutter is then between between the two, and its major advantage is simple in structure.With regard to drive mechanism, original Single-sens reflex camera.For example: the vigorous dish spy of Bo Langnika (Bronica) and Haas (Hassedlad) etc., drive mechanism is more complicated all, thereby price is also all very expensive.

All has complicated interlock between its reserve of the camera of general interchangeable reserve and the body.The cost of reserve is also than higher.

The objective of the invention is to original Single-sens reflex camera is that the labyrinth that the function that reaches more has is reasonably simplified, reduce many actuated elements, try hard to realize more function with the simplest structure, and be suitable for producing in enormous quantities preferably, and reduce cost greatly.

Figure (1) is a gear train parts decomposition view of the present invention, and broken section can be seen the structure of clutching member.

Figure (2) is the standby condition view before shutter discharges.

Figure (3) is the Status view after shutter discharges.

Figure (4) is the synoptic diagram according to the camera of gear train making of the present invention.

Main points of the present invention have provided a kind of transmission mechanism of Single-sens reflex camera, and it comprises a roll film gear mechanism, and one is shunk aperture device and a shutter relieving mechanism automatically. Shown in figure (1), an end end of axle (2) reaches outside the body of camera, is fixed with above the camera winch (1) as driving element. Close camera winch one end is equipped with the cam (15) as first setting element on axle (2), also have a positioning lever (16) to be fixed on the minor axis (17), in order to limit the stop position of camera winch, the other end of axle (2) is fixed with a driving cam (19), be fixed with gear (3) between positioning cam (15) and driving cam (19), it is meshed with another gear (4) on being fixed on axle (10). The top of axle (10) is fixed on (not shown in FIG.) on the driver plate. The other end is fixed on the body. Gear (4) is positioned at the centre of axle, and another gear (5) is fixed on the end. There is a ratchet under spring action, to contact with gear (5), prevents that gear from reversing. The other end of axle be equipped with one tighten shutter tighten driver plate (12), the driver plate nail (12a) of a column is arranged above it, stir shutter by it and tighten handle (13) and positioning lever (33). The roll film gear (6) that is meshed with gear (5) is contained on the thin position of load axle (8) actively, and it has the axle sleeve (6a) of a projection. Pitch of fins control ratchet (7) also is housed on the load axle (8) actively, extends to gear (6) with the tubular portion (7a) of its one. Have a breach (7b) on its end tube wall. A brake spring (9) that can make roll film gear (6) and load axle (8) jointly rotate or break away from arranged in that the tubular portion (7a) of ratchet is inner. Its end freely is wound on the load axle (8), and the other end is wound on the axle sleeve (6a), and it is inner at breach (7b) that its spring head props up the palm. Driven cam (19)

The connecting rod (20) that drives is contained on the body versatilely, and columnar projections part (20a) and another block-shaped protrusion part (20b) is arranged on the connecting rod.Driving cam acts on the columnar projections part (20a) the driving force of connecting rod.When connecting rod was depressed by cam, the release hook (26a) that the block-shaped protrusion part on the connecting rod just is used as first shutter releasing member hooked.The other end of connecting rod (20d) is contacted with connecting rod (20c) end to be a shutter aperture transmission ring (22), is contained in the back of aperture.It has two overhanging arms (22a) (22b) along diametric(al), and arm (22b) is controlled by connecting rod, and arm (22a) is then controlled the shutter release lever (24) as second shutter releasing member.Also has a bossing vertical (22c) on the transmission ring with anchor ring.Contraction with the control aperture.Shutter release button driver plate (30) as control shutter release element movably is contained on the body.Its horizontal bottom (30c) has a rectangular groove (30d) a screw (31), being wound with extension spring (32) above links to each other with body, can make driver plate do transverse movement, have a breach (30a) on the sidewall (30e) of driver plate one side pin the step (30b) of driver plate in also have a confession positioning lever (33) and the restoring lever (36) of breach.Be contained in versatilely on the axle (28) as an end of the pendulum (27) of releasing member and the middle part of release hook (26), the other end of pendulum embeds breach (30a) lining of driver plate.One end of release hook is that hook portion (26a) other end has a bossing (26b) and the bossing (27b) of pendulum to withstand mutually.Being wound with an extension spring on release hook and the pendulum resets it.Be contained in versatilely on the axle (34) as the positioning lever (33) of second setting element with as the restoring lever (36) of reposition element.There is an inclined-plane (33b) end on a limit of positioning lever, when this inclined-plane with tighten dial dial that nail joint is touched or when breaking away from, its other end end (33a) is just lifted or fallen, and opens or pin the shutter release button driver plate.One end of restoring lever (36) contacts with connecting rod, and also there is a breach (36a) other end end.After pressing shutter release button, connecting rod discharges and pushes restoring lever open, and restoring lever falls, and breach (36a) pins the shutter release button driver plate.

Figure (2) is the plan view that is in standby condition before shutter discharges.Shown in figure (2), when the stop position of camera winch after shutter discharges begins to clockwise rotate, except that shutter release button driver plate and shutter tighten the handle, other element of this gear train all is kept in motion, gear mechanism rotates according to direction shown in figure (1) upward arrow, gear (6) is by clutch spring (9) and load axle (8) composition one, rotation and coiling film are meanwhile synchronously, driven wheel (19) is depressed connecting rod gradually, connecting rod is stirred the diaphragm shutter transmission ring, and transmission ring is stirred aperture opens greatly it gradually.In the rotation process, tighten dial and broken away from second positioning lever, positioning lever falls, and pins driver plate, and after rocking handle rotated a week, the bossing of first positioning lever (16a) just fell into the breach of positioning cam with its pinning.At this moment, driving cam is in position shown in figure (2), and connecting rod has been released hook lock, the afterbody of link rod pulls up restoring lever, tighten driver chuck and shutter is tightened handle and tighten, simultaneously second positioning lever dialled, make the shutter release button driver plate be in open mode.So far, the preparation that discharges of having carried out this.

Figure (3) is the release conditions plan view that shutter discharges back mechanism.After pressing shutter release button, release hook breaks away from link rod, and link rod is upspring under spring action, and the diaphragm shutter transmission ring is suitable rotating counterclockwise under spring action.Its bossing (22C) leaves the aperture control handle shrinks aperture.The arm of transmission ring (22) is depressed shutter release lever shutter is discharged.Simultaneously, the link ends of upspringing (20C) is depressed first positioning lever makes it break away from positioning cam, and the other end of link rod (20d) breaks away from restoring lever, and restoring lever falls and pins the shutter release button driver plate.So far a shooting process is finished.

The present invention compares with existing single lens reflex camera, and structure is greatly simplified, and has reduced many actuated elements, but does not lose the advanced function of original camera because of simplification.Because designs simplification, reduced production cost widely, camera with drive mechanism of the present invention, with similar camera, for example Bo Langnika (Bronica) compares actuated element with the vigorous dish spy of Haas (Hassedlad) and can reduce 2/3rds, price can reduce about thirtyfold, and is very suitable to a kind of popular camera

Figure (4) has shown a kind of interchangeable reserve 120 Single-sens reflex cameras (38) of making according to the present invention.(38a) being the front portion of camera, is two side (38b) and (38c), and (39) are view finders, and it also can take off and change.(40) be the reserve of camera, it also can take off and change the reserve of different pictures amplitude.Gear train of the present invention is positioned at body (38b) side.Shutter release lever and speed adjusting gear are positioned at body (38c) side, and the shutter reflector partly is positioned at body central authorities.Counting mechanism is then in (40a) side of reserve (40).In order to guarantee that rocking handle whenever circles, the roll film gear makes egative film lick one, and the present invention designs the gear number of teeth, makes that working as rocking handle whenever circles, and the roll film gear just turns over 1 1/3 week and the egative films of reeling.A pitch of fins is subjected to the control of pitch of fins control ratchet simultaneously, and pitch of fins control ratchet is subjected to the control of counting mechanism.Control the prevention that ratchet is subjected to counting mechanism when a pitch of fins, just stop operating.The spring of clutch simultaneously breaks away from ratchet and roll film gear, thereby stops roll film, and has guaranteed that a pitch of fins equates.Make according to the present invention an interlocking device is arranged between its reserve of camera and the body, open a seam near body one side in reserve, can insert a square plate washer, it is right to take off reserve, this plate must be inserted, and just can take off.This plate must be taken out when taking pictures, just shutter can be pressed.The interchangeable three kinds of reserve of making according to the present invention of camera, that is: 120 volumes are 12,16, and 36 of 135 volumes are to satisfy different photographing requests.

Claims (12)

1, a kind of have roll film and aperture, a shutter interlock, interchangeable reserve, be applicable to the gear train of Single-sens reflex camera.It is characterized in that; Said gear train comprises a roll film gear mechanism, an automatic contracting mechanism of aperture and a shutter releasing mechanism.Said gear mechanism comprises two groups of gears, a pitch of fins control element, a clutching member and one group of setting element.The automatic contracting mechanism of said aperture comprises a driving cam, a connecting rod and a diaphragm shutter transmission ring.Said shutter releasing mechanism comprises a shutter release button driver plate, first, second shutter releasing member, one group of shutter driving element, and second setting element and a reposition element.

2,, it is characterized in that said pitch of fins control element is a ratchet according to the gear train of the said camera of claim (1).Its tubular portion extends to the roll film gear, and tubular portion has a breach near on the end tube wall of roll film gear.

3, according to the gear train of the said camera of claim (1), it is characterized in that said clutching member is a spring, its end freely is wound on the load axle, and the other end is on the axle sleeve of roll film gear, and insert in the breach of ratchet tubular portion its end.

4,, it is characterized in that said one group of setting element comprises one group of positioning cam and a backstay thick stick according to the gear train of the said camera of claim (1).Positioning lever one end has a bossing.

5,, it is characterized in that having on the said connecting rod bossing of a column according to the gear train of the said camera of claim (1).On columnar projections part next door, a shape bossing is arranged.

6, according to the gear train of the said camera of claim (1), it is characterized in that said diaphragm shutter transmission ring is loaded on the rear portion of aperture, it has two overhanging arms, is positioned at diametric(al).A block-shaped protrusion part vertical with the garden anchor ring is arranged on one side of transmission ring.

7, according to the gear train of the said camera of claim (1), it is characterized in that having a breach on the sidewall of said shutter release button driver plate, the pendulum of first shutter releasing member embeds breach.On the breach next door one step is arranged.Its horizontal bottom has a rectangular slot, has a screw that driver plate is linked to each other with body in the groove, hangs with an extension spring on the screw and makes the driver plate can be along transverse movement.

8, according to the gear train of the said camera of claim (7), it is characterized in that said first shutter releasing member comprises a release hook and a pendulum, they are contained on the axle versatilely, and the end end that release hook contacts with connecting rod becomes hook-type, and the other end has a bossing.One end of pendulum is contained on the said axle, and the other end embeds in the breach of shutter release button driver plate, also has the lug boss phase-splitting on a bossing and the release hook to withstand on the pendulum.

9, according to the gear train of the said camera of claim (1), it is characterized in that said second shutter releasing member is a shutter release lever, it is positioned at shutter speed governing one side of camera.

10,, it is characterized in that said one group of shutter driving element comprises that one tightens dial and shutter tightens handle according to the gear train of the said camera of claim (1).Tighten the column of projection dial nail is arranged on the dial.

11,, it is characterized in that said second setting element is a positioning lever according to the gear train of the said camera of claim (1).It with tighten the dial end end that contacts one inclined-plane arranged.Positioning lever and reposition element are contained on the axle rotationally.

12,, it is characterized in that said reposition element is a restoring lever according to the gear train of the said camera of claim (11).Its end contacts with connecting rod, and there is a breach other end end.

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