CN1425952A

CN1425952A - Disposable mechanical camera

Info

Publication number: CN1425952A
Application number: CN 01144320
Authority: CN
Inventors: 大岛繁
Original assignee: Arc Design Inc
Current assignee: Arc Design Inc
Priority date: 2001-12-14
Filing date: 2001-12-14
Publication date: 2003-06-25

Abstract

The disposable camera with film driving motor includes lighttight casing with exposure hole; film wound on the reel on one side of the exposure hole; cassette with film reel and film capable of being taken out on the opposite side to the wound film with one end attached to the film reel; and motor to wind the unexposed film to the reel and rewind the exposed film to the film cassette. The disposable camera with built-in motor for all film winding needs no special film installing unit to wind unexposed film in a dark room and no manual winding mechanism.

Description

Vehicularized disposable camera

Technical field

The present invention relates to a kind of disposable camera, it is equipped with a rollfilm in advance, i.e. 135 yards type films, and simple exposure mechanism is installed in this camera, such as phtographic lens, shutter and film propulsive mechanism.The invention particularly relates to a kind of like this disposable camera, wherein film propulsive mechanism and film are in advance installed by built-in motor driven, particularly, the structure that relates to a kind of camera housing, the any part that can from this structure, take out the film after exposing at an easy rate and can not damage camera shell, thus make manufacturer under the situation that does not need additional any part or make amendment, use this camera repeatedly.

Background technology

Disposable camera is nowadays very general on market.The unexposed film of in this camera, packing in advance, after each exposure, this film to the optical film magazine that takes out that is provided at equally in this camera, be its objective is that when making how the user is in office wants to take pictures, it is just capable of taking pictures to need not to buy expensive camera by rollback.Yet, because the shell structure of these disposable cameras can not be used them repeatedly, unless destroy the part of housing otherwise film after can not taking out exposure.And pack into the in advance mode of camera of film is also quite complicated.

According to United States Patent (USP) NO.4884087 and 4972649 disclosed contents, usually by following steps assembling disposable camera: the film that will extract out from optical film magazine (patrone) in the darkroom is rolled into volume; The film spooled and optical film magazine are contained in respectively in the accommodating chamber in the main part that is formed on this disposable camera; Thereby bonnet is closed disposable camera by installing on the main casing light tightly; Thereby sealing this disposable camera then can not be opened it.For carrying out above-mentioned steps, must provide a kind of physical construction very complicated special film erecting device, and institute all need to finish in the darkroom in steps.As everyone knows, such darkroom film operation is quite to bother.

And the bonnet of traditional disposable camera sealed by lighttight, so unless can open it just destroy this lighttight film shell, the film after also could taking out this expose from camera.These two things promptly are rolled into film in advance with special film erecting device in the darkroom and must destroy lighttight film shell and make manufacturer and photographic print merchant can not easily use this disposable camera repeatedly in order to take out film after the exposure from camera.Concerning common user, can not operate according to above-mentioned steps.So the traditional disposable camera on the market can not use repeatedly now, has only some parts to reuse in new disposable camera.

If disposable camera, just as disposable camera of the present invention, built-in motor is arranged, can under daylight, easily film be wound on film in advance in advance on tack-up spool by it, and need be by means of the special instrument of camera outside, such as the film erecting device, equally by using this motor under daylight, easily a new film to be installed in this disposable camera once more.And if this disposable camera has certain back cover, then can be easily the film after the exposure taken out from camera and need not destroy any part of camera shell, and manufacturer or photographic print merchant also can use such disposable camera repeatedly, and do not have any problem.

Under the situation of using disposable camera of the present invention, manufacturer or photographic print merchant do not need to provide the instrument that resembles this class costliness of film erecting device that is used in the darkroom, do not need to destroy any part of disposable camera yet, just can under daylight, in disposable camera, easily load onto new film dirt-cheap once more.The personal user also can finish this work without any need for speciality tool even.

In addition, if this same built-in motor can be rolled film automatically after each exposure, then can save artificial winding mechanism, compared with traditional artificial roll film disposable camera, the operation of this disposable camera will make things convenient for manyly.

Summary of the invention

Therefore, an object of the present invention is to provide a kind of disposable camera, this camera has a built-in motor, uses this motor can quite easily finish reinstalling of pre-volume of film and film, and need be from the help of the machinery of any kind of of camera outside.

Another object of the present invention provides a kind of disposable camera, this camera has a built-in motor that has an automatic winding device, it is a kind of through custom-designed simple mechanism, be used for the film driving direction also being used for controlling the control and the release of sprocket wheel and shutter from advance transferring the ordinary film direction of reeling or opposite of advancing to around direction.

Another purpose of the present invention provides a kind of disposable camera with certain bonnet, and the film that this bonnet can easily be opened with after will exposing takes out from camera, and can not destroy any part of camera.

In order to achieve the above object, disposable camera according to the present invention comprises the main casing with exposure hole; Be built in pre-motor in the main casing around film or wraparound film; Film is in advance around tack-up spool, by the motor on exposure hole one side that places in this main casing with unexposed film around this film in advance on tack-up spool; The optical film magazine that takes out that wherein has a film wireline reel, the end of film are inserted and secured in the groove on this optical film magazine, and this optical film magazine places the opposite side of exposure hole in the described main casing; The film winding unit, it is by the motor driven that is built in described main casing, be used for unexposed film in advance around film in advance around tack-up spool, and the film after will exposing (frame) raps around in the optical film magazine; Shutter sprocket wheel control device, its control exposure and film winding unit; Use hinge to be installed in bonnet on the main casing from the rear side of main casing, this bonnet can close or open by locked-tripper; With the protecgulum that is installed in from the front side on the main casing, it makes whole camera shell become a lighttight shell with the bonnet of closing.

According to the present invention, new unexposed film is wound on film in advance on tack-up spool in advance, and after each exposure, the film after the exposure is rolled onto on the bobbin of this optical film magazine by film of wraparound.The motor that is built in the main casing had both driven the pre-around the wraparound that also drives exposure back film of unexposed film.After all film burn-outs of film were finished, this film all rapped around in the optical film magazine, just can take out this film under daylight from this disposable camera by opening bonnet.Under the situation of disposable camera of the present invention, any part that need not to destroy this disposable camera just can be with the film after the exposure from wherein taking out.

Generally speaking, traditional 35mm minicam use film moving that has vehicularized film driving makes the perforation on the sprocket wheel rotation counting film, and after licking a film of film motor is shut down.Simultaneously, the rotation of sprocket wheel also is used for shutter loading (charge).Therefore, after unclamping shutter and film when advancing, sprocket wheel always cooperates advancing of this film to rotate, and is associated with the rotation of sprocket wheel this moment, and shutter is loaded.Therefore, under the situation of the minicam of traditional 35mm motor driven, for recoil film after having exposed at whole film or in advance around unexposed film, the sense of rotation that a switch changes motor always must be provided or use the interlock mechanism of very complicated formation to change the direction of film running, this mechanism makes sprocket wheel avoid shutter is loaded.Otherwise, if the direct of travel of film by from take direction be transformed in advance around or recoil direction, then this shutter load maintainer will be stuck owing to sprocket wheel, make its can not along with film in advance around or recoil on the direction and move.

In the disposable camera of the present invention, built-in motor be used to the unexposed film that will from optical film magazine, extract out around film in advance on tack-up spool, also be used for the film of each exposure back after and rap around to optical film magazine exposure.Therefore, unexposed film in advance around and will expose after film rap around between the optical film magazine both of these case, the direction of built-in motor rotation should be different, and every kind of situation is necessary to change the direction that built-in motor is rotated.

In order to finish the conversion of this motor sense of rotation, disposable camera of the present invention uses the method for the position of counter-rotating battery in the battery chamber, make electric current depend on battery and become another kind of the flow direction from a kind of flow direction, and also the sense of rotation of motor can be transformed into another direction from a direction in Semi-polarity position, battery chamber.In order to use above-mentioned conversion method, the battery chamber of disposable camera of the present invention is through custom-designed battery chamber, the one side has a common spring contact, opposite side has different types of two kinds of hard contacts, by select in two hard contacts according to the polarity of inserting battery wherein, correspondingly change sense of current.

By changing the direction of motor rotation, the direction that film is advanced also from advance around direction, promptly film is walked out optical film magazine and is rolled onto film and transfers the film direction of unrolling to around the direction of tack-up spool in advance, promptly film raps around to direction the optical film magazine around tack-up spool in advance from film.

Usually by using sprocket wheel to finish shutter loading and the control of film travel distance, this sprocket wheel is meshed with the perforation of film.When film in advance around and when mobile, this sprocket wheel must freely rotate with the film hole of rotating, and should not do that any shutter loads or film travel distance control (will stop film like this advances).On the contrary, when film raps around in the optical film magazine, sprocket wheel also must rotate with the film hole of running, but this moment is when film is advanced, must load shutter for exposure next time during sprocket wheel, and must load with shutter in each exposure back and the sprocket wheel control device be operated and stops to advance of film.In order to finish the sprocket wheel function conversion according to film direct of travel or motor sense of rotation, disposable camera of the present invention has a kind of simple physical construction, this mechanism comprises that as one the shutter of sprocket wheel loads and releasing device, when film by the wraparound optical film magazine in the time, this sprocket wheel rotates in the direction in the effect lower edge in the film hole of advancing, when film by when film is in advance on tack-up spool, also can make on other directions of sprocket wheel with the film hole of rotating and freely rotate, and without any need for the interlock mechanism of kind.This simple shutter sprocket wheel control device is used for a plurality of purposes, such as shutter press, shutter unclamps, switch on or off motor, in order around film sprocket wheel to be separated with the shutter load maintainer in advance.

Description of drawings

Figure 1 shows that the forward perspective view of the vehicularized disposable camera of one embodiment of the invention;

Fig. 2-a is that the vehicularized disposable camera of Fig. 1 is at the skeleton view dorsad of opening the decomposition under the bonnet situation;

Fig. 2-b is the skeleton view dorsad of decomposition of the vehicularized disposable camera of Fig. 1, wherein, is placed with an optical film magazine in the optical film magazine chamber;

Fig. 3 is the gear set of vehicularized disposable camera of Fig. 1 and the decomposition diagram of motor;

Fig. 4 is the back to skeleton view of the battery cover vehicularized disposable camera that is opened, illustrates the arranging batteries position;

Fig. 4-a illustrates the vehicularized disposable camera of Fig. 1 and places at pre-battery around with these two kinds of patterns of photograph taking the time;

Fig. 4-b illustrates the battery contact of the battery chamber of the vehicularized disposable camera that is arranged in Fig. 1;

Fig. 5 is the circuit diagram of vehicularized disposable camera in advance around unexposed film time of Fig. 1;

Fig. 5-a is the circuit diagram of vehicularized disposable camera when finishing in advance around the back but not pushing shutter release button of Fig. 1;

Fig. 5-b is the circuit diagram of the vehicularized disposable camera shutter of Fig. 1 when being loaded;

Fig. 5-c is the circuit diagram of vehicularized disposable camera when film is pushed into of Fig. 1;

Fig. 6-a is the decomposition diagram of shutter sprocket wheel control device of the vehicularized disposable camera of Fig. 1, this camera residing state this moment is: shutter is pressed, battery is placed into the photograph camera site, and unexposed film places exposure frame to be ready for the photograph shooting afterwards;

Fig. 6-b is the decomposition diagram of shutter sprocket wheel control device of the vehicularized disposable camera of Fig. 1, and this camera just is in unexposed film around pre-state on tack-up spool;

Fig. 6-c is the decomposition diagram of shutter sprocket wheel control device of the vehicularized disposable camera of Fig. 1, wherein, this camera be in finish pre-around unexposed film but battery still be arranged in the battery chamber in advance around the state of position;

Fig. 6-d is the decomposition diagram of shutter sprocket wheel control device of the vehicularized disposable camera of Fig. 1, and wherein, but this camera is in and unclamps the state that shutter cable release (shutterrelease) button is not also got back to initial position;

Fig. 6-e is the decomposition diagram of shutter sprocket wheel control device of the vehicularized disposable camera of Fig. 1, and wherein, this camera is in the state of the tack-up spool of the released back film wraparound of shutter in optical film magazine;

Fig. 6-f is the decomposition diagram of shutter sprocket wheel control device of the vehicularized disposable camera of Fig. 1, and wherein, after this camera was in whole films and all exposes, film involved in the state of optical film magazine fully;

Fig. 7 be illustrate sprocket wheel cam and cam following bar in succession with the figure of relative motion.

Embodiment

Figure 1 shows that a preferred embodiment of the present invention.Disposable camera 1 comprises main housing portion 2, front cover portion 3 and back cover portion 4.On the outer wall of main housing portion 2, have a phtographic lens 5, viewfinder window 6, flashlamp window 7 and cable release button 8, portion comprises necessary photograph taking mechanism within it, such as tripper, be used to drive the motor 16 of film, the mechanism that the film propulsive mechanism is relevant with other.Front cover portion 3 in a well-known manner, for example the mode by fixed screw is installed on the main housing portion 2.Back cover portion 4 usefulness hinges 9 are fixed on the main housing portion 2, and himself and main housing portion 2 can be locked.Thereby by these three parts, be main housing portion 2, front cover portion 3 and back cover portion 4, disposable camera 1 closely is contained in the shell that has some openings, and these openings are used to expose phtographic lens 5, viewfinder window 6, flashlamp window 7, cable release button 8 etc.

Fig. 2-a and Fig. 2-b illustrate the inner structure of the housing of this disposable camera 1 that back cover portion 4 opens.Shown in Fig. 2-a, in main housing portion 2, have in advance around tack-up spool 10 and the optical film magazine chamber 11 that holds optical film magazine 12, this places the opposite both sides of exposure frame 13 in advance respectively around tack-up spool 10 and optical film magazine chamber 11.Be extruded with a fork 14 from the diapire of optical film magazine chamber 11, it can be with gear set 15 rotations that driven by the motor 16 that is contained in the main housing portion 2, as shown in Figure 3.When installing with new film 18 for this disposable camera 1 in advance (is 135 yards type films, hereinafter be called for short film in order to simplify) time, need open back cover portion 4, optical film magazine 12 is put into optical film magazine chamber 11, the position of adjusting optical film magazine 12 meshes together up to the top and the fork 14 of optical film magazine 12, again optical film magazine 12 is pulled out in the termination 17 of film 18 and is placed on film shown in Fig. 2-b in advance on tack-up spool 10.

After closing and lock back cover portion 4, open battery chamber cap 21 as shown in Figure 4, according to be used for as Fig. 4-a, Fig. 5 and Fig. 5-a indicated in advance around battery polar mark 20-a 1.5 volts of AA batteries 22 of one joint are placed battery chamber 19, cover battery chamber cap 21 then.

The moment that cable release button 8 is pressed is shown in Fig. 6-b, under the driving of built-in motor 16, begin to reel in advance film 18, film 18 is twisted in film in advance on tack-up spool 10, is twisted in this film fully in advance on tack-up spool 10 time up to whole film 18, and this is in advance around stopping.All can under daylight, finish around all these steps of film in advance.

Before disposable camera 1 dispatches from the factory, need battery 22 to be taken out and put it into battery chamber 19 once more with different orientation according to the battery polar mark 20-b that is used for the photograph shooting that is indicated as Fig. 4-a, Fig. 5-b and Fig. 5-c, thereby when motor rotates with different directions, can pre-film 18 rollback optical film magazines 12 around state will be broken away from.

As mentioned above, in disposable camera 1 of the present invention, after finishing the installation in advance of film, be necessary the direction of motor rotation from being converted to the film direction (hereinafter being called the photograph screening-mode) of unrolling around direction (hereinafter being called pre-winding mold formula) in advance, and this conversion is merely able to finish by the polarity position of counter-rotating battery in battery chamber 19, and in other words this conversion can be finished with respect to battery contact 23,25 in the battery chamber 19 and 26 position by changing battery polar.Correspondingly, shown in Fig. 4 and Fig. 4-a, in the battery chamber 19 or the polarity mark on next door (+/-) show respectively in advance around taking the placement orientation of the battery of these two kinds of patterns with photograph.Therefore the circuit and the driving mechanism of the motor of disposable camera 1 of the present invention are so designed, thereby when battery 22 places in advance around the position, motor 16 continue to use in advance around the direction rotation to drive film 18, perhaps when battery 22 places the photograph camera site, motor 16 is continued to use in the direction of photograph shooting and is rotated to drive film 18, and promptly the direction that raps around in the optical film magazine 12 along film is rotated.

Shown in Fig. 4-a, a kind of battery contact in the battery chamber 19 is common metal plate springs contact 23.Shown in Fig. 4-b, there is a recessed zone 24 (as recessed zone, hole) another kind of contact, is provided with two different hard contacts 25 and 26 here.Shown in Fig. 4-b, hard contact A25 is the sheet metal shape, and it is placed in after this recessed zone 14, and another hard contact B26 is a metal protrusion shape, and it is positioned at the leading edge place in this recessed zone 24.Shown in Fig. 4-a, Fig. 5-b and Fig. 5-c, when the polarity mark 20-b that indicates in according to battery chamber 19 when battery 22 places the position of photograph screening-mode, have only the positive pole of battery 22 to contact with the hard contact A25 after being positioned at this recessed zone 24.On the contrary, shown in Fig. 4-a, Fig. 5 and Fig. 5-a, because hard contact B26 is positioned at the leading edge in this recessed zone 24, when the polarity mark 20-a that indicates in according to battery chamber 19 when battery 22 places the position of pre-winding mold formula, have only the negative pole of battery 22 to contact with this contact B26.

Therefore, the motor circuit of disposable camera 1 of the present invention is so designed, so that in two hard contacts 25 at recessed regional 24 places in which utmost point in the positive pole that electric current depends on battery 22 and the negative pole and the battery chamber 19 and 26 which contacts, and flow through two different circuit, that is to say that the sense of rotation that does not need motor carries out any change, as long as the position of counter-rotating battery 22 in battery chamber 19 just may be with circuit from being transformed into photograph shooting motor rotary mode around the motor rotary mode in advance.Pre-winding mold formula is with reference to Fig. 5-a, and the photograph screening-mode is with reference to Fig. 5-c.

Fig. 6-a shows a preferred embodiment of the shutter sprocket wheel control device of disposable camera 1 of the present invention.Film 18 is advanced along the direction of arrow shown in Fig. 6-a.One end of sprocket shaft 29 has a sprocket wheel 27, and this sprocket wheel 27 is meshed with hole 28 on the film 18, and the other end of sprocket shaft 29 has a sprocket wheel cam 30.One chain sprocket 31 is arranged on sprocket wheel 27, and chain sprocket 31 also is provided on the sprocket shaft 29 as the part of sprocket wheel 27.Upper end at the main shaft 33 of this shutter sprocket wheel control device has a cam following bar 32, this cam following bar 32 contacts and follows this sprocket wheel cam 30 motions with the lateral surface of sprocket wheel cam 30, its load one main shaft volute spring 57, obtain elastic force upwards, have a fast door control lever 34 in the lower end of main shaft 33.When cam following bar 32 touches the lateral surface of sprocket wheel cam 30, sprocket wheel 27 and the interlock mutually of shutter load maintainer, if and film 18 is advanced along the direction shown in the arrow among Fig. 6-a, then the mobile hole 28 of sprocket wheel 27 and film 18 is together along rotating counterclockwise, sprocket wheel cam 30 also is rotated counterclockwise, and then cam following bar 32 is along with the lateral surface of this sprocket wheel cam 30 turns clockwise, and main shaft 33 also turns clockwise, simultaneously, fast door control lever 34 also turns clockwise.On cam following bar 32 or the next door have a cable release button 8, below cable release button 8, have with central elastic surface of contact 43, this surface of contact always upwards promotes to burst at the seams soon button.The end of central elastic surface of contact 43 is changed to the upper surface of cam following bar 32 and contacts, thereby when pressing cable release button 8, the main shaft 33 of cam following bar 32 and shutter sprocket wheel control device is also downward thereupon, makes cam following bar 32 break away from the lateral surface of sprocket wheel cam 30.

The end 41 of fast door control lever 34 and a shutter driver 37 are in the groove of the notch 42 places interlock of shutter driver 37.Shutter driver 37 is with a directing pin 38 left and right sides slippages, and this directing pin 38 is positioned at a grooved rail 39 and is connected mutually with it, and this grooved rail 39 is positioned at an end of shutter driver 37.Shutter driver 37 loads one shutter loading spring 40, and make it remain on loading position, in this position, this shutter driver 37 is subjected to the stopping of end 41 of fast door control lever 34, also be subjected to stopping of sprocket wheel cam 30, this sprocket wheel cam 30 stops the motion of main shaft 33 and cam following bar 34.

When cam following bar 32 and main shaft 33 broke away from the obstruction that is provided with by sprocket wheel cam 30, sprocket wheel operating rod 34 also gained freedom, and shutter driver 37 is immediately to the right towards shutter 52 motions, and can not be subjected to any resistance from the end 41 of fast door control lever 34.When pressing cable release button 8, cam following bar 32 also moves downward, separate with sprocket wheel cam 30, and when main shaft 33 is also free, fast door control lever 34 also gains freedom and rotates counterclockwise, shutter driver 37 is under the effect of the elastic force of shutter loading spring 40, move right immediately, and the top of the end 53 bump blades 51 of shutter driver, to open shutter 52, and into cross the top of this blade 51 unclamping shutter 52 follow-up continuing, thereby blade 51 can be got back to original state to close shutter 52.Also provide a bar driver 35 and be connected, this bar driver 35 Quality Initiatives wheel change-over switch central contact 46 with shutter driver 37.One end 35-a of this bar driver 35 passes a little rectangular aperture window 58 and stretches, and this little rectangular aperture window 58 is positioned on the tripper base portion 59 along the course of the end 53 of shutter driver 37.The other end of bar driver 35 has the part of the outshot 35-b of a similar boss as this bar driver 35, bar driver 35 can carry out support motion (pivotal movement) under the support of rotating shaft 60, and the two ends of bar driver 35 are all removable in this support motion.Shutter driver 37 opens and cuts out soon behind the door, advances and bump against an end 35-a of bar driver 37 and be parked in that position to the farther place in the end 53 of shutter driver 37.

When the bump that is subjected to the end 53 of shutter driver 37 as this end 35-a moved right, bar driver 35 was rotated counterclockwise, thus the outshot 35-b of bar driver 35 also along with bar driver 35 in the counterclockwise direction rotation and rotate counterclockwise.When outshot 35-b rotates in the counterclockwise direction, it is set to promote sprocket wheel change-over switch central contact 46, this sprocket wheel change-over switch central contact 46 is to closing contact 48 motions of sprocket wheel change-over switch, this sprocket wheel change-over switch also has a break contact 47, sprocket wheel change-over switch central contact 46 is clipped between this two contact as sandwich, and sprocket wheel change-over switch central contact 46 contacts with the closing contact 48 of sprocket wheel change-over switch to open sprocket wheel change-over switch (46﹠amp; 48).Shown in Fig. 6-d, shutter sprocket wheel control device still is in the state that cable release button 8 is pressed now, and shutter 52 is closed but is not also loaded by shutter loading spring 40.

The end 41 of fast door control lever 34 be positioned at shutter driver 37 on the otch 42 on grooved rail 39 next doors be connected mutually.If cam following bar 32 contacted sprocket wheel cam 30 when the sprocket wheel cam was rotated counterclockwise with sprocket wheel 27, then cam following bar 32 can contact with the lateral surface of sprocket wheel cam 30 and along with its rotation is rotated along clockwise direction, as shown in Figure 7, the figure shows in succession and the related action of sprocket wheel cam 30 and cam following bar 32.Fast subsequently door control lever 34 also turns clockwise, and the end 41 of fast door control lever 34 promotes shutter driver 37 left, makes shutter loading spring 40 be in full load condition, thus control shutter 52.When sprocket wheel cam 30 is rotated counterclockwise, chain sprocket 31 is also along equidirectional rotation, and the corner 49 of the bending of sprocket wheel change-over switch central contact 46 contacts with the columniform lateral surface of chain sprocket 31, and this crooked corner 49 keeps contacting with the columniform lateral surface of chain sprocket 31 and along with it moves.When shutter is loaded and the corner 49 of the bending of sprocket wheel change-over switch central contact 46 when entering the groove 50 that is positioned on the chain sprocket 31 and resting on the there, sprocket wheel change-over switch central contact 46 is separated with the closing contact 48 of sprocket wheel change-over switch and is contacted with the break contact 47 of sprocket wheel change-over switch, and film 18 stops to advance.

On shutter sprocket wheel control device, some switch contacts are arranged.Have a central spring contact 43 below cable release button 8, it pushes away this cable release button always.On central spring contact 43 and between cable release push button shaft and the cam following bar 32, have a cable release switch closure contact 44, this closing contact 44 always contacts with central spring contact 43, unless when cable release button 8 is pressed.Between opposite side, cable release push button shaft and the cam following bar 32 of cable release switch closure contact 44, have one in advance around change-over switch closing contact 45, unless press cable release button 8, it does not contact with central spring contact 43.Central authorities' spring contact 43 is clipped in cable release switch closure contact 44 as sandwich and in advance between change-over switch closing contact 45.If press cable release button 8, then open around change-over switch 45 in advance, as long as do not press cable release button 8, cable release switch 44 is always closed.As mentioned above, also have two switch contacts, sprocket wheel change-over switch central contact 46 is clipped in the middle of both.One is the break contact 47 of sprocket wheel change-over switch, and another is the closing contact 48 of sprocket wheel change-over switch.

With reference to Fig. 5-a, circuit is so designed, make when battery shown in Fig. 4-a 22 places pre-winding mold formula not press cable release button 8, no matter all place the switch in the shutter sprocket wheel control device, be cable release button, sprocket wheel change-over switch and in advance how, motor 16 is quit work around the ON/OFF position of change-over switch.

After finishing the prepackage of film 18 as mentioned above, unclamp by the finger that is pressed on the cable release button 8, then cable release button 8 should be got back to initial position, and initial position is got back in the elastic force effect that the main shaft 33 of shutter sprocket wheel control device also is subjected to main shaft volute spring 57.Fig. 6-c shows a kind of state of shutter sprocket wheel control device, and under this state, cable release button 8 has gone back up to initial position but also do not loaded to shutter; The main shaft 33 of this shutter sprocket wheel control device has moved to the back upper place; Disconnect the cable release switch closure in advance around change-over switch; And sprocket wheel change-over switch closure; But battery 22 still is in pre-winding mold formula in battery chamber 19.Because battery 22 still is in pre-winding mold formula, motor 16 is stopped with pre-disconnection around change-over switch 45.With reference to figure 5a.

Need now this disposable camera 1 is inserted the photograph screening-mode, need battery 22 is taken out from battery chamber 19, and again this battery 22 is put into battery chamber 19 with different polarity positions according to the polarity that is used for the photograph screening-mode that Fig. 4-a indicated, so that this disposable camera 1 is transformed into the photograph screening-mode from pre-winding mold formula.Because shown in Fig. 6-c and Fig. 5-a, cable release button 8 is when its initial position, cable release button and sprocket wheel change-over switch are all closed, therefore, be transformed into moment of photograph screening-mode at battery location from pre-winding mold formula, electric current flows through cable release button and sprocket wheel change-over switch, shown in Fig. 5-c, and motor 16 begins to rotate, and film 18 beginnings are moved along the direction shown in the arrow among Fig. 6-e, and sprocket wheel 27 and sprocket wheel cam 30 are rotated counterclockwise with the film that moves.Subsequently, when cam following bar 32 with the contact of the lateral surface of sprocket wheel cam 30 under when clockwise rotating, the main shaft 33 of shutter sprocket wheel control device also begins to turn clockwise, this sprocket wheel cam 30 is rotated counterclockwise with sprocket wheel 27.At this moment, fast door control lever 34 begins to clockwise rotate, and fast door control lever 34 is withdrawn into initial position with shutter driver 37, in this position, shutter driver 37 and shutter loading spring 40 lockings that load fully, and block the end 41 of the fast door control lever 34 that is meshed together by the groove of the notch 42 with shutter driver 37.Along clockwise direction in the setting in motion, bar driver 35 breaks away from shutter drivers 37 at shutter driver 37, shown in Fig. 6-e, and along turning clockwise.Subsequently, outshot 35-b no longer presses pressing sprocket change-over switch central contact 46, sprocket wheel change-over switch central contact 46 will self be separated from, and sprocket wheel change-over switch central contact 46 is under the effect of himself elastic force, contact the columniform lateral surface of chain sprocket 31 with the corner 49 of bending, and when chain sprocket 31 rotates along with the rotation of sprocket wheel 27, this corner 49 keeps in touch with the columniform lateral surface of chain sprocket 31 always, when this crooked corner 49 falls into groove 50 on the cylindrical outer side 27 of chain sprocket 31.

Drop into moment in the groove 50 on the cylindrical outer side of chain sprocket 31 at the corner 49 of the bending of sprocket wheel change-over switch central contact 46, whole chain wheel change-over switch central contact 46 directions to close sprocket shaft 29 move, sprocket wheel change-over switch central contact 46 is left the closing contact 48 of sprocket wheel change-over switch and is parked on the break contact 47 of sprocket wheel change-over switch, and motor 16 is stopped.

Sprocket wheel 27 is from starting to the range ability that stops, and promptly the sprocket wheel distance of rotating a whole week is designed to just range ability with a film of film 18 be complementary (8 sprockets one enclose).Turn over back and sprocket wheel 27 when stopping when a film of film, one section new unexposed film of film 18 is drawn out film in advance around tack-up spool 10 and after being positioned at exposure frame 13, exposure frame 13 places film in advance between tack-up spool 10 and optical film magazine 12, and this moment, this disposable camera 1 was ready to be put to use and photograph taking.

Finish film in advance around and battery 22 has been put into by the orientation shown in Fig. 4-a and Fig. 5-b be used for photograph screening-mode mentioned above in the battery chamber 19 after, new raw film (first film of unexposed film) is at film in advance after the exposure frame 13 between tack-up spool 10 and optical film magazine 12, and shutter is loaded.Therefore, when disposable camera 1 of the present invention when production line comes out, shutter sprocket wheel control device always is in a kind of like this state, promptly shutter 52 is loaded, first unexposed film places after the exposure frame 13, cable release switch (43﹠amp; 44) closure, the sprocket wheel change-over switch disconnects, shown in Fig. 6-a and Fig. 5-b.

Shutter sprocket wheel control device is under the state shown in Fig. 6-a, when pressing cable release button 8, cam following bar 32 moves downward and breaks away from sprocket wheel cam 30, and when main shaft 33 is also free, fast door control lever 34 also gains freedom and begins to rotate counterclockwise, shutter driver 37 moves right under the effect of the power of shutter loading spring 40 immediately, the top of the end 53 bump blades 51 of shutter driver is to open shutter, and after unclamping shutter 52, blade 51 travels forward and crosses the top of blade 51, so that can be got back to initial position to close shutter 52.

Bar driver 35 meshes together with shutter driver 37, this bar driver 35 Quality Initiatives wheel change-over switch central contact 46.One end 35-a of bar driver 35 passes a little rectangular aperture window 58 and stretches, and this little rectangular aperture window 58 is positioned on the tripper base portion 59 along the running route of the end 53 of shutter driver 37.The other end of bar driver 35 has the part of the outshot 35-b of a similar boss as this bar driver 35, and this bar driver 35 can carry out support motion by means of the support of rotating shaft 60, and the two ends of bar driver 35 are all removable in this support motion.After shutter was opened and closed by shutter driver 37, the end 53 of shutter driver 37 travelled forward and the end 35-a of drop bar driver 35 and be parked in that position again.

When the bump that is subjected to the end 53 of shutter driver 37 as end 35-a moved right, bar driver 35 was rotated counterclockwise, thus the outshot 35-b of bar driver 35 also along with bar driver 35 in the counterclockwise direction support motion and motion counterclockwise.When outshot 35-b moves in the counterclockwise direction, it is set to promote sprocket wheel change-over switch central contact 46, this sprocket wheel change-over switch central contact 46 is to a closing contact 48 motions of sprocket wheel change-over switch, this sprocket wheel change-over switch also has break contact 47, sprocket wheel change-over switch central contact 46 is sandwiched between these two contacts as sandwich, and sprocket wheel change-over switch central contact 46 touches the closing contact 48 of sprocket wheel change-over switch to open sprocket wheel change-over switch (46﹠amp; 48).

Present sprocket wheel change-over switch (46﹠amp; 48) be closed, but cable release switch (43﹠amp as mentioned above; 44) disconnect, because cable release button 8 still is pressed, makes the central contact of shutter and separate around change-over switch 43 and cable release switch closure contact 44 in advance, shown in Fig. 6-d.

Since shutter 52 has been released, then need locate the next unexposed film of film 18.When the finger of pushing is removed cable release button 8, cable release switch (43﹠amp; 44) closed immediately, make the central contact of shutter and contact cable release switch closure contact 44 around change-over switch 43 in advance.

Because sprocket wheel change-over switch (46﹠amp; 48) closed, at present, shown in Fig. 5-c, electric current flows through cable release button and sprocket wheel change-over switch, and motor 16 begins rotation, and film 18 beginning moves along the directions shown in arrow among Fig. 6-e, and sprocket wheel 27 and sprocket wheel cam 30 are rotated counterclockwise with the film of motion.Subsequently, when cam following bar 32 began to turn clockwise owing to the lateral surface that contacts sprocket wheel cam 30, the main shaft 33 of shutter sprocket wheel control device also began to turn clockwise, and described sprocket wheel cam 30 is along with the rotation of sprocket wheel 27 is rotated counterclockwise.

At this moment, fast door control lever 34 begins to clockwise rotate, and fast door control lever 34 is withdrawn into initial position with shutter driver 37, in this position, shutter driver 37 and shutter loading spring 40 lockings that load fully, and block the end 41 of the fast door control lever 34 that is meshed together by the groove of the notch 42 with shutter driver 37.Along clockwise direction in the setting in motion, bar driver 35 breaks away from shutter drivers 37 at shutter driver 37, shown in Fig. 6-e, and along turning clockwise.

Then, outshot 35-b no longer presses pressing sprocket change-over switch central contact 46, sprocket wheel change-over switch central contact 46 will self be separated from, and sprocket wheel change-over switch central contact 46 is under the effect of himself elastic force, contact the columniform lateral surface of chain sprocket 31 with the corner 49 of bending, and when chain sprocket 31 rotates along with the rotation of sprocket wheel 27, this corner 49 keeps in touch with the columniform lateral surface of chain sprocket 31 always, when this crooked corner 49 falls into groove 50 on the cylindrical outer side 27 of chain sprocket 31.

As mentioned above, sprocket wheel 27 is from starting to the range ability that stops, and promptly the sprocket wheel distance of rotating a whole week is designed to just range ability with a film of film 18 be complementary (8 sprockets one enclose).When a film of film turned over back and sprocket wheel 27 and stops, one section new unexposed film of film 18 was drawn out film in advance around tack-up spool 10 and after being positioned at exposure frame 13, and exposure frame 13 places film in advance between tack-up spool 10 and optical film magazine 12.

Shutter sprocket wheel control device has turned back to the original state among Fig. 6-a now, and wherein shutter is loaded, and a new unexposed film of film 18 is located in after the exposure frame 13, and disposable camera 1 is ready to photograph shooting next time.

As mentioned above till now, in disposable camera 1 of the present invention, the moving up and down of main shaft 33 of the shutter sprocket wheel control device that is caused by moving up and down of cable release button 8 controlled nearly all operations necessary process, such as for film in advance around keeping sprocket wheel 27 to load and the separating of releasing mechanism, taking sprocket wheel 27 and shutter loads and releasing mechanism links together along with 28 transmissions of film hole, the closure of moving or disconnect all switches controls motor 16 for photograph with shutter.

Shown in Fig. 6-a, the exposure counting gear 54 be meshed for the counting gear driving claw 55 of sprocket wheel cam 30 parts.As previously mentioned, sprocket wheel 27 changes one whole film that a whole circle is walked around film 18, and counter gear driving claw 55 is designed to each sprocket wheel 27 and sprocket wheel cam 30 changes a whole circle, exposure counting gear 54 tooth that just advances.The quantity of the tooth of exposure counting gear 54 is designed to identical with the exposure frequency of film 18, and should numeral, from 1 single exposure to the end that exposes for the first time, be to be 27 times under 27 the situation for example at the exposure frequency of film, be printed on the edge of the upper surface of exposure counting gear 54, exposure counting gear 54 matches each exposure counting with each corresponding tooth of this gear 54, thereby when first film is exposed, numeral 1 appears on the indicator and so finishes exposure counting film to the last, when last film is exposed, the counting out on the present indicator of this last film.

After last film is exposed, film after all exposures of film 18 has all rapped around in the optical film magazine 12, if and when the end of film left film in advance behind tack-up spool 10 motor 16 still rotate, then film can all rap around in the optical film magazine 12, and motor 16 also can not stop operating.In order to prevent this unnecessary motor rotation after whole volume film 18 has rapped around in the optical film magazine 12, as shown in Figure 6, be provided with a film sensitive switch 56 on the coboundary next door of exposure frame 13.

When film at film in advance when on film sensitive switch 56, moving between tack-up spool 10 and the optical film magazine 12, film sensitive switch 56 is depressed by film 18, and film sensitive switch 56 is always closed in order to CD-ROM drive motor 16 when being depressed by film 18.When the least significant end of film 18 leaves film in advance when tack-up spool 10 is crossed exposure frame 13 and film sensitive switch 56, the film sensitive switch is no longer depressed by film, and it is stretched under the spring force effect and disconnects, thereby motor 16 is stopped operating.Thereby crossing film sensitive switch 56 back motors 16 at the end of film 18 stops operating.

Claims

1. disposable camera that has the motor that advances film comprises:

Have the lighttight shell of exposure hole, finish exposure by this exposure hole;

Be wound on a pre-unexposed film on tack-up spool, this places a side of described exposure hole in advance around tack-up spool;

The optical film magazine that takes out that wherein has a film reel, this optical film magazine in described light tight shell, place described exposure hole with described pre-around the opposite side of tack-up spool, an end of described unexposed film is attached on the described film reel;

Motor, it makes the described pre-described unexposed film of extracting out from described optical film magazine to roll that rotates around tack-up spool, and after exposure each time, the described film reel rotation that makes described optical film magazine is to rap around to described unexposed film in the described optical film magazine and to be rolled onto on the described film reel; And

For described film in advance around changing the device of the sense of rotation of described motor with the described film scrolling in each exposure back, comprising:

By the sprocket wheel that motion drove of described film, be used to handle a shutter loaded members; With

The sprocket wheel control member, it makes described sprocket wheel break away from this shutter loaded members or makes described sprocket wheel and described shutter loaded members combines.

2. disposable camera as claimed in claim 1 wherein also comprises a battery chamber, provides three battery contacts that are used for a batteries in this battery chamber, thereby by select two in these three contacts for this batteries, can change the direction of motor rotation.

3. disposable camera as claimed in claim 1, wherein said sprocket wheel control member is driven by the motion of described cable release button.

4. disposable camera as claimed in claim 3, wherein, when described cable release button was pressed, described sprocket wheel and described shutter loaded members broke away from and can rotate around direction in advance along film.

5. disposable camera as claimed in claim 3, wherein, when described cable release button was not pressed, described sprocket wheel combined with described shutter loaded members, and described sprocket wheel is merely able to along the direction rotation of coiling film film be rotated back in the described optical film magazine.

6. disposable camera as claimed in claim 1, wherein said light tight shell comprises the main housing portion with a shutter means, and back cover portion, this back cover portion can be open for and take out described optical film magazine after described film burn-out, and these two parts are used a hinge and the locking/unlocking member forms a unit.

7. disposable camera as claimed in claim 1, the wherein said optical film magazine that takes out are 135 yards type optical film magazines, and it has one, and an end of described film just invests on this axle.