JP3032612U - Film unit with lens - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To securely close a light-shielding lid incorporated in a photo film when the photo film is completely rolled up in the photo film to prevent exposure of the photo film when taking out the photo film from the lens-fitted photo film unit. SOLUTION: 40 film delivery ports 42 of Patrone
When the front end portion 13a of the photographic film 13 passes near, the film detection lever 30 swings counterclockwise.
The restriction on the lid member drive lever 51 is released, and the lid member drive lever 51 is rotated counterclockwise by the bias of the spring 52. The arm portion 51b comes into contact with the cam member 53 integrally provided on the lower surface of the winding knob 5 to restrict the rotation of the lid member drive lever 51. When the winding knob 5 is rotated to move the notch 67 of the cam member 53, the lid member driving lever 51 is further rotated, and the lid member 24 is closed by the engagement piece 58. The lid member 24 is locked in the closed position by the lock member 44.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to a lens-fitted film unit for loading a photographic film cartridge having a lid member for opening and closing a film delivery port.

[0002]

[Prior art]

 A film unit with a lens that incorporates a simple shooting mechanism, such as a shooting lens and shutter mechanism, and an unexposed photo film pulled out from this cartridge, such as "Sharun Run Super 800" (trade name), Manufactured and sold by the applicant. This lens-equipped film unit uses resin parts for each of the above-mentioned mechanisms and unit body so that you can easily take pictures and take pictures, thus reducing the manufacturing cost. In addition, a large number of such film units with a lens are proposed in which a photographic film cartridge using a plastic cartridge is loaded.

In the above plastic patrone, instead of a conventional lens for shielding the film delivery port, it is rotatable between an open position for opening the film delivery port and a closed position for shielding the film delivery port. There is a plastic lid member that is used. Further, some such cartridges are provided with a locking mechanism for locking the lid member in the closed position. This locking mechanism presses the outer circumference of the shaft end of the lid member when the lid member is in the open position to fix the lid member in the open position, and when the lid member is rotated to the closed position, the lock mechanism itself is elastic. Due to this, a lock member is used that locks by entering into the notch portion of the shaft end. Then, when the lid member opening / closing member is inserted into the shaft end portion when the lid member is rotated between the open position and the closed position, the lock member is pressed so as not to come into contact with the lid member. The lid is rotated so that it is pushed away. As a result, the driving force required to rotate the lid member can be reduced. In this way, if the patrone is provided with the locking mechanism for the lid member, the lid member will not be accidentally opened due to vibration or impact when dropped, so that the light shielding property inside the patrone is improved.

In a cartridge having such a lid member, the lid member must be securely closed when it is taken out from the lens-fitted film unit. Therefore, in the device disclosed in Japanese Patent Laid-Open No. 6-130558, etc., an engaging piece that engages with the end of the lid member is rotatably provided on the bottom lid that is opened when the cartridge is taken out. Before the lid is opened, the engagement piece is rotated to rotate the lid member to the closed position. As a result, the lid member is always in the closed position when the cartridge is taken out.

The manual closing operation of the lid member is troublesome when developing a large number of lens-fitted film units, and it deteriorates the working efficiency. Therefore, the lid member of the cartridge should be closed automatically. Is desirable. To do this, it may be possible to detect the presence or absence of a photographic film near the film outlet outside the Patrone and rotate the lid member when the photographic film cannot be detected.

[0006]

[Problems to be solved by the device]

 However, even if the photographic film is no longer detected near the film delivery port, the tip of the photographic film actually exists between this detection position and the inside of the film cartridge. When closed, the lid member will pinch the photographic film. In this state, the lid member cannot be completely closed, so there is a problem that when the cartridge is taken out of the lens-fitted film unit, the photographic film in the cartridge is exposed to light.

Further, in the lens-fitted photo film unit, the period from the completion of shooting of all photo films to the removal of the cartridge is irregular, and some users may delay the request for the development process and may take several months. Sometimes it becomes. In such a case, the lock member may be plastically deformed by being continuously deformed for a long time. Then, when the cartridge is taken out of the lens-fitted photo film unit, the lock member cannot engage with the lid member, and the cartridge loses the lid member locking mechanism.

The present invention has been made in view of the above problems, and is a lens in which the lid member is automatically closed after the photographic film is completely caught in the cartridge, and the locking member of the cartridge is not destroyed. The purpose is to provide an attached film unit.

[0009]

[Means for Solving the Problems]

 In order to solve the above problems, the lens-fitted film unit according to claim 1 detects the presence of a photo film in the vicinity of the film delivery port outside the cartridge, and winds the photo film after the photo film is no longer detected. A lid member rotating mechanism is provided for rotating the lid member to the closed position when the knob is rotated. The lid member rotating mechanism has an engaging piece that engages from the inner peripheral side at the shaft end of the lid member that opens and closes the film delivery port of the cartridge, and the lid member is rotated to the closed position by this engaging piece. The lock member incorporated in the patrone engages with the notch at the shaft end from the outer peripheral side, and the lid member is locked at the closed position. At this time, the lock member is prevented from being deformed by the contact with the engaging piece.

According to a second aspect of the present invention, the lid member rotating mechanism is incorporated together with a spring for urging the lid member in the closing direction, and the lid member rotating mechanism is configured to urge the lid member member by urging the spring. It has a function to rotate only from the open position to the closed position. In the lens-fitted film unit according to claim 5, the lid member is held in the open position against the bias of the spring when the photo film is present near the film outlet of the cartridge. It

Further, in the lens-fitted film unit according to claim 4, a cam surface is formed on the winding knob, so that the cam surface is brought into contact with the film surface even when there is no photographic film near the film delivery port of the cartridge. Thus, the lid member rotating mechanism holds the lid member in the open position against the spring, and when the winding knob is subsequently rotated, the lid member is rotated to the closed position.

According to a fifth aspect of the present invention, the lid member rotating mechanism is rotatably incorporated in the vicinity of the film outlet of the film cartridge, and is brought into contact with the photographic film so that the photographic film is close to the film outlet. A film detection lever for detecting the presence or absence of the film is brought into contact with a cam member formed integrally with the winding knob, and the film detection lever is interlocked with the movement of the cam member after releasing the contact with the photographic film. And a member for detecting the rotation operation of the winding knob.

[0013]

[Action]

 After filming, the photo film is rolled into the film cartridge by rotating the film winding knob. When the film detection lever detects that the rear edge of the photo film has passed near the film outlet, the lid member rotation mechanism tries to rotate the lid member in the closing direction, but it is formed on the winding knob. Due to the restriction of the cam surface, the lid member still does not rotate in the closing direction. When the winding knob is rotated from this state, the lid member rotating mechanism is closed in response to the movement of the cam surface, and the lid member is rotated to the closed position. In the closed state of the lid member, the lock member engages with the notch formed in the shaft end of the lid member from the outer peripheral side to lock the lid member in the closed position. At this time, the locking member is prevented from coming into contact with and deforming the engaging piece that is engaged with the shaft end portion of the lid member from the inner peripheral side, so that the lid member is reliably locked. I can.

[0014]

[Embodiment of device]

 FIG. 2 shows the external appearance of the lens-fitted film unit of the present invention. The lens-fitted film unit 2 is of a type that has been made thinner, and is composed of a unit main body 3 having a photographing mechanism and the like and a paper box 4 storing the same. The paper box 4 has a contour that exposes the winding knob 5, the shutter button 6 and the like incorporated in the unit body 3, and also exposes the taking lens 7, the viewfinder 8, the number of shots display window 9 and the like. Holes are provided.

In FIG. 3 showing the structure of the unit main body 3, the unit main body 3 includes a main body 11 and a photo film cartridge 14 including a photo cartridge 12 and a photo film 12 loaded in the main body 11, and a main body 11. The exposure unit 15 is attached to the front surface of the main body 11, and the rear cover 16 and the front cover 17 are attached to the back surface and the front surface of the main body 11.

The main body 11 is made of opaque plastic, and a light shielding cylinder 20 is integrally provided on the optical axis 19. An exposure opening 20a is formed on the front surface of the light-shielding cylinder 20, and an aperture is formed on the back surface thereof to determine the exposure range of the photographic film 13. On both sides of the light-shielding cylinder 20, a cartridge chamber 21 for accommodating the cartridge 12 and a film roll chamber 22 for accommodating the photographic film 13 in a roll form are formed. The front surface of the outer wall of the cartridge chamber 21 has a shape projecting forward from the front surface of the outer wall of the film roll chamber 22.

On the upper surface 21 a of the cartridge chamber 21, a lid member rotating mechanism 25 for rotating the lid member 24 for opening and closing the film outlet of the cartridge 12, and a key for engaging the spool 26 of the cartridge 12 are provided. The winding knob 5 having the shaft 27 formed at the bottom is assembled. In addition, an opening 28 facing the upper edge of the photographic film 13 arranged between the cartridge chamber 21 and the film roll chamber 22 is formed in the upper portion of the light-shielding cylinder 20. A sprocket (not shown) which is incorporated in the exposure unit 15 and engages with the perforations 29 (see FIG. 1) of the photographic film 13 to charge the shutter and the like is inserted into the opening 28, and the lid member is rotated. One end of the film detection lever 30 that constitutes the mechanism 25 is also inserted.

The rear cover 16 is made of opaque plastic, and a film support surface 32 is formed on a portion of the main body 11 facing the aperture. On the bottom side, pull-top type bottom lids 33 and 34 that cover the bottom surfaces of the cartridge chamber 21 and the film roll chamber 22 are provided, respectively. The bottom lid 33 serves as a take-out lid for taking out the cartridge 12 containing the exposed photographic film 13. In addition, a recess 35 is formed in the film support surface 32 at a position facing the opening 28 of the main body 11 and is recessed toward the rear side of the film support surface 32. The sprocket of the exposure unit 15 and one end of the film detection lever 30 are inserted into the recess 35.

The front cover 17 is made of opaque plastic, and has a shutter button 6, a window for displaying the number of shots 9, and the like. Further, the front cover 17 is formed with a projecting portion 37 matching the projection of the cartridge chamber 21, and the projecting portion 37 serves as a grip at the time of photographing. The front cover 17 is assembled to the main body 11 and the rear cover 16 by a claw engagement.

The exposure unit 15 has a base portion 38 formed of opaque plastic, and a film winding mechanism, a film counter mechanism, a shutter mechanism, and the like incorporated therein. Further, the taking lens 7 is incorporated in the front surface side of the base portion 38, and the finder 8 is incorporated in the upper portion of the base portion 38.

As shown in FIG. 1, the cartridge 12 is a combination of a first case 40 and a second case 41, which are molded by plastics that form the outer shell of the cartridge 12, and the first and second cases 40, 41. A film delivery port 42 through which the photographic film 13 formed in and out of the eye enters and exits, and is freely rotatable between a closed position for blocking the film delivery port 42 and an opened position for opening the film delivery port 42, which is incorporated in the back of the film delivery port 42. It is composed of a closed lid member 24 and a spool 26 around which the photographic film 13 is wound in the cartridge 12.

Although not shown, the cartridge 12 regulates the outer circumference of the photographic film 13 wound by a cup-shaped flange provided on the spool 26, so that the photographic film 13 in the cartridge 12 is loosened. do not do. As a result, when the spool 26 is rotated, the rotation can be transmitted to the photographic film 13 without waste, and the photographic film 13 can be sent out by the rotation of the spool 26.

A lock member 44 that locks the lid member 24 between the open position and the closed position is integrally formed on the inner wall of the first case 40. The lock member 44 has elasticity, and when the lid member 24 is in the open position, the lid member 24 is pressed against the outer periphery of the cylindrical shaft end portion 45 formed at the end portion of the lid member 24. keeping. Then, when the lid member 24 is rotated to the closed position, the lid member 24 enters the notch 46 formed in the shaft end portion 45 and locks the lid member 24 in the closed position.

Further, a hole 48 for exposing the shaft end portion 45 of the lid member 24 to the outside is formed on the side surfaces of the first and second cases 40, 41. The hole 48 is larger than the shaft end portion 45. Further, on the inner walls of the first and second cases 40, 41, a partition wall 49 is provided to divide the inside of the cartridge 12 into a film chamber 12a for storing the photographic film 13 and a lock member chamber 12b for storing the lock member 44. Has been formed. Due to the partition wall 49, even if external light enters the lock member chamber 12b, the external light does not enter the film chamber 12a.

The lid member rotating mechanism 25 includes a lid member drive lever 51 that rotates the lid member 24 from the open position to the closed position, and a bar 52 that urges the lid member drive lever 51 toward the closed position. And a film detection lever 30 for detecting the presence of the photo film 13 near the film delivery port 42 outside the cartridge 12 and a lower part of the winding knob 5 which are integrally formed to hold the lid member drive lever 51 in the open position. It is composed of a cam member 53 and a projection 54 arranged above the lid member drive lever 51.

The lid member drive lever 51 is integrally formed with a thin disk 51a so that the arm 51b and the corner 51c are projected. A shaft portion 57 that is inserted into a hole 56 formed in the upper surface 21a of the cartridge chamber 21 at the lower portion of the disc 51b to allow the lid member drive lever 51 to rotate, and a shaft end portion of the lid member 24. An engagement piece 58 that engages with 45 is formed. As shown in FIG. 7, the engagement piece 58 includes a columnar portion 58a inserted into the inner diameter 45a of the shaft end portion 45 and a protruding portion 58b that abuts on the cutout portion 46 of the shaft end portion 45. Then, when the lid member drive lever 51 is rotated toward the closed position, as shown in FIG. 8, the protrusion 58b of the engaging piece 58 pushes the notch 46 of the shaft end 45 to rotate the lid member 24. While being moved, the lock member 44 is pressed and deformed to be pushed away from the outer periphery of the shaft end portion 45.

The spring 52 includes a coil portion 52 a into which the shaft portion 57 of the lid member driving lever 51 is inserted, a pin 60 formed on the lower surface of the arm portion 51 b of the lid member driving lever 51, and an upper surface of the cartridge chamber 21. 21a and the end portions 52b and 52c respectively engaged with the pin 61. The spring 52 has both the properties of a torsion spring that urges the lid member drive lever 51 toward the closed position and a compression spring that is provided above and urges the lid member drive lever 51.

The film detection lever 30 is inserted into the opening 28 of the main body 11 and comes into contact with the photographic film 13 on the outer side of the perforation 29, and on the side surface of the corner 51 c of the lid member drive lever 51. The other end 64 that abuts and holds the lid member drive lever 51 in the open position against the bias of the spring 52, and the shaft 65 that allows the one end 63 and the other end 64 to rotate. Consists of. The film detection lever 30 is attached to the upper surface of the light shielding cylinder 20.

As shown in FIG. 4, while the one end 63 of the film detecting lever 30 is in contact with the photographic film 13, the other end 64 of the film detecting lever 30 is at the corner 51 c of the lid member driving lever 51. The lid member drive lever 51 is prevented from rotating to the closed position by contacting the side surface of the. Then, as shown in FIG. 5, when the leading end portion 13a of the photographic film 13 passes through the one end portion 63 of the film detecting lever 30, the one end portion 63 of the film detecting lever 30 is formed on the rear cover 16. It becomes possible to freely rotate between the position where it abuts in the recess 35 and the position where the other end 64 abuts the lid member drive lever 51.

The cam member 53 is integrally formed on the lower surface of the winding knob 5, and has a disk-shaped arc-shaped cutout 67 coaxial with the winding knob 5. A key shaft 27, which is inserted into a hole 68 formed in the upper surface 21a of the cartridge chamber 21 and is engaged with a key hole 26a formed at the end of the spool 26 of the cartridge 12, is provided below the cam member 53. Has been formed.

As shown in FIG. 4, the arm portion 51 b of the lid member drive lever 51 biased to the closed position by the spring 52 is in contact with the outer periphery of the cam member 53. At this time, the cam member 53 and the other end 64 of the film detection lever 30 hold the lid member drive lever 51 in the open position. Then, when the winding knob 5 is rotated counterclockwise and the leading end portion 13a of the photographic film 13 passes through the one end portion 63 of the film detection lever 30, as shown in FIG. 5, the lid member drive lever 51 causes the cam member 5 to move. Only 3 will hold in the open position. When the winding knob 5 is further rotated counterclockwise, the notch 67 of the cam member 53 is moved to a position facing the arm 51b of the lid member driving lever 51, as shown in FIG. As a result, the holding of the lid member drive lever 51 at the open position is released, and the lid member drive lever 51 is rotated to the closed position while pushing the film detection lever 30 away at the corner 51c by the bias of the spring 52. To be done.

As described above, when the film detection lever 30 does not detect the photographic film 13 and the winding knob 5 is rotated by a certain amount, the notch 67 of the cam member 53 causes the notch 67 of the lid member drive lever 51 to move. In order to face 51b, the winding amount of the photographic film 13 with respect to the rotation amount of the winding knob 5 must be strictly specified. However, the length of the photo film 13 is determined depending on the number of shots, and the patrone 12 can wind up the photo film 13 without loosening it, so that when the unit main body 3 is assembled, If the positioning with the winding knob 5 is performed, the above operation can be realized relatively easily.

The protrusion 54 is integrally formed on the inner wall of the upper surface of the front cover 17, and has a semicircular cross section. As shown in FIG. 10, the upper surface of the lid member drive lever 51 biased upward by the spring 52 is always in contact with the protrusion 54. When the lid member drive lever 51 is rotated to the closed position, the orientation of the semicircular shape of the protrusion 54 and the semicircular hole 70 formed on the upper surface of the lid member drive lever 51, as shown in FIG. However, the protrusion 54 is inserted into the hole 70 of the lid member drive lever 51 which is biased by the spring 52. As a result, the drive piece 58 of the lid member drive lever 51 comes off from the shaft end portion 45 of the lid member 24, and the pressing force of the lock member 44 is released. Therefore, as shown in FIG. Thereby enters the inner diameter 45a of the shaft end portion 45 of the lid member 24 and locks the lid member 24 in the closed position.

Next, the operation of the above embodiment will be described. A user who purchases the lens-fitted film unit 2 shown in FIG. 2 first rotates the winding knob 5 to prepare for photographing the shutter charge and the like. After that, the photographing range is confirmed with the finder 8, and the shutter button 6 is pressed to photograph one frame. After photographing, the winding knob 5 is rotated to wind the photographed film 13 into the cartridge 12. When the winding knob 5 is rotated at this time, as shown in FIG. 1, the notch 67 of the cam member 53 formed in the lower portion of the winding knob 5 is located at a position facing the arm 51b of the lid member drive lever 51. Although it is moved many times, the lid member drive lever 51 is not rotated to the closed position because it is held in the open position by the other end portion 64 of the film detection lever 30. Further, as shown in FIG. 10, the upper surface of the lid member drive lever 51 is brought into contact with the protrusion 54 arranged above by the bias of the spring 52.

As shown in FIG. 7, in the lid member 24, since the engaging piece 58 formed on the lower portion of the lid member drive lever 51 is engaged with the shaft end portion 45, the lid member drive lever 51 is opened. When held in the position, the lid member 24 is also held in the open position. Further, the locking member 44 is pressed against the shaft end portion 45 of the lid member 24 on the outer periphery thereof, but the amount of deformation of the locking member 44 at this time is small, so that there is no plastic deformation.

The photographing is repeated as described above, and after all the photographing on the photo film 13 stored in the film roll chamber 22 is finished, the winding knob 5 is rotated to rotate all the photo films 13 on the patrone 12. Perform the operation to wind up inside. As shown in FIG. 4, during the winding of the photographic film 13, one end 63 of the film detecting lever 30 is in contact with the outside of the perforation 29 of the photographic film 13 through the opening 28 of the main body 11. When the film detecting lever 30 detects the presence of the photographic film 13 in this way, the other end 64 of the film detecting lever 30 contacts the side surface of the corner 51c of the lid member driving lever 51, and the spring 52 is released. The lid member drive lever 51 is held in the open position against the bias of the. Further, since the arm portion 51b of the lid member drive lever 51 is also in contact with the cam member 53, the lid member drive lever 51 is held at the open position by the film detection lever 30 and the cam member 53.

As shown in FIG. 5, when the winding knob 5 is slightly rotated and the leading end portion 13 a of the photographic film 13 passes through the one end portion 63 of the film detection lever 30, the one end portion 63 of the film detection lever 30 is The photographic film 13 is no longer contacted, that is, the photographic film 13 is no longer detected. At this time, the one end 63 of the film detecting lever 30 is no longer regulated by the photographic film 13, so that the one end 63 of the film detecting lever 30 comes into contact with the recess 35 formed in the film supporting surface 32 of the rear cover 16. It becomes possible to freely rotate about the shaft portion 65 between the position and the position where the other end portion 64 contacts the corner portion 51c of the lid member drive lever 51, and to the open position of the lid member drive lever 51. Is released. In this state, since the arm portion 51b of the lid member driving lever 51 is in contact with the cam member 53, the lid member 24 is continuously held in the open position.

When the winding knob 5 is further rotated, as shown in FIG. 6, the notch 67 of the cam member 53 is moved to a position facing the arm portion 51b of the lid member drive lever 51, and the lid member drive lever is moved. The holding of 51 in the open position is released. Then, the lid member drive lever 51 is rotated to the closed position in the counterclockwise direction by the bias of the spring 52 while pushing the film detection lever 30 away. Further, as shown in FIG. 8, the engaging piece 58 of the lid member drive lever 51 rotates the lid member 24 to the closed position while pressing the lock member 44 with the protrusion 58b to push it away from the shaft end 45. Let

When the lid member drive lever 51 is rotated to the closed position, as shown in FIG. 11, the orientation of the semicircular hole 70 formed in the upper surface and the semicircular protrusion 54 arranged above is oriented. Are matched. As a result, the contact between the protrusion 54 and the upper surface of the lid member drive lever 51 is released, so that the lid member drive lever 51 is moved upward by the bias of the spring 52, and the protrusion 54 is inserted into the hole 70. It Then, the engaging piece 58 of the lid member drive lever 51 comes off from the shaft end portion 45 of the lid member 24. As a result, the lock member 44 releases the pressing force of the protrusion 58b of the engaging piece 58, and as shown in FIG. 9, the lock member 44 is engaged with the notch 46 of the shaft end 45 of the lid member 24 by its elasticity. Then, the lid member 24 is locked at the closed position.

The used lens-fitted film unit 2 is requested by the user to print at the same time at a development shop or the like, and sent from the shop to the development room. At the developing station, the paper box 4 is removed, and the cartridge 12 is taken out from the unit main body 3. To take out the cartridge 12, the winding knob 5 is rotated to check whether the photo film 13 is entirely wound in the cartridge 12, and then the bottom lid 33 is opened by using a tool such as a screwdriver. . Since the lid member 24 of the cartridge 12 is rotated to the closed position and further locked by the lock member 44, this take-out work can be performed in a bright room.

In the above embodiment, the protrusion 54 provided on the inner wall of the upper surface of the front cover and the hole 70 of the lid member driving lever 51 are semicircular, but the shape is not limited to this. Instead, any shape such as a triangle, a key shape, a rectangle, or the like that is fitted when the lid member drive lever 51 is rotated to the closed position may be used. There is also a notch provided on the front end side of the photographic film 13 in order to prevent the front end portion 13a from being caught in the cup-shaped flange of the spool 26. In order to prevent the film detection lever 30 from detecting this notch, it is preferable to make the one end 63 larger than the notch.

Further, as shown in FIG. 12, an engaging piece of the lid member drive lever 51 may be a protrusion 75 that is in contact with the upper portion 46 a of the cutout portion 46 of the lid member 24. Since the lock member 44 and the shaft end portion 45 come into contact with each other near the middle portion in the height direction of the shaft end portion 45, as shown in FIGS. The protrusion 75 does not contact the lock member 44 during and after the rotation of the member 24 to the closed position. As a result, the deformation amount of the lock member 44 becomes small, and the plastic deformation of the lock member 44 can be prevented without moving the lid member drive lever 51 upward.

Further, as shown in FIGS. 15 and 16, a mark 77 is provided on the upper surface of the arm portion 51b of the lid member drive lever 51 to mark the mark 77 when the lid member drive lever 51 is rotated to the closed position. You may make it provide the hole 78 in the upper surface of a front cover in the position facing. According to this, since the position of the lid member 24 can be visually confirmed from the outside of the lens-fitted film unit 2, it is necessary to carry out the film winding operation for all the lens-fitted film units 2 when taking out the cartridge 12. Is eliminated, and work efficiency is improved.

[0044]

[Effect of device]

 As described above, according to the lens-fitted photo film unit of the present invention, the lid member can be closed by the winding operation of the photo film performed after the photographing is completed, so that the lens-fitted photo film unit loaded with the conventional photo film cartridge is used. The photographic film cartridge can be taken out by the same taking-out work as in the above step, and the troublesomeness can be eliminated and the working efficiency can be improved. Also, the rotation of the lid member to the closed position is performed after the tip of the photo film is completely caught in the cartridge, so that the photo film may be exposed by sandwiching the photo film with the lid member. There is no. Furthermore, since the lock member that locks the lid member is not destroyed by plastic deformation, the patrone after being taken out from the lens-fitted film unit can maintain a reliable light-shielding property.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a configuration of a lid member rotating mechanism.

FIG. 2 is a perspective view showing the outer appearance of the lens-fitted film unit of the present invention.

FIG. 3 is an exploded perspective view showing a configuration of a unit main body.

FIG. 4 is an explanatory view showing a lid member rotating mechanism before film winding.

FIG. 5 is an explanatory view showing a lid member rotating mechanism during film winding.

FIG. 6 is an explanatory view showing a lid member rotating mechanism after the film winding is completed.

FIG. 7 is an explanatory diagram showing a state of the lock member when the lid member is at the open position.

FIG. 8 is an explanatory diagram showing a state of the lock member when the lid member is rotating toward the closed position.

FIG. 9 is an explanatory diagram showing a state of the lock member when the lid member is in the closed position.

FIG. 10 is a cross-sectional view of the main parts of the unit main body when the lid member is in the open position.

FIG. 11 is a cross-sectional view of the main parts of the unit main body when the lid member is in the closed position.

FIG. 12 is a perspective view showing a lid member driving lever according to another embodiment of the present invention.

FIG. 13 is an explanatory diagram showing a state of the lock member when the lid member drive lever of another embodiment is in the open position.

FIG. 14 is an explanatory view showing the state of the lock member when the lid member drive lever of another embodiment is in the closed position.

FIG. 15 is a perspective view showing a lid member driving lever of still another embodiment of the present invention.

FIG. 16 is an explanatory view showing a usage example of a lid member drive lever of still another embodiment.

[Explanation of symbols]

 2 Film unit with lens 5 Winding knob 12 Patrone 13 Photo film 21 Patrone chamber 24 Lid member 25 Lid member rotating mechanism 30 Film detection lever 44 Lock member 51 Lid member drive lever 52 Spring 53 Cam member 54 Projection

Claims (5)

[Scope of utility model registration request] 1. A lid member that is rotatable between a closed position that shuts off a film outlet and an open position that opens, and when the lid member is pivoted to the closed position, one shaft end portion thereof is provided. A patrone that incorporates a lock member that locks the lid member to the closed position by engaging the formed notch from the outer peripheral side, the patrone chamber that houses this patrone, and the patrone spool that is assembled on top of this patrone chamber A lens-fitted film unit having a winding knob for engaging and rotating each spool to rotate the spool to wind the exposed photographic film into a film cartridge, wherein the photographic film is near a film outlet of the film cartridge. By detecting the presence of, by the rotation operation of the winding knob after the photo film is no longer detected,
A lid member rotating mechanism for rotating the engaging piece engaged with the shaft end of the lid member from the inner peripheral side to rotate the lid member to the closed position is provided, and the lid member is rotated to the closed position. When the lock member is engaged with the notch, the lock member is prevented from being deformed due to contact with the engagement piece. 2. The lid member rotating mechanism is incorporated together with a spring for urging the lid member in a closing direction, and the lid member rotating mechanism rotates the lid member only from an open position to a closed position by urging the spring. The film unit with lens according to claim 1. 3. The lid member rotating mechanism moves the lid member to an open position against the bias of the spring by contact with the photographic film when the photographic film exists near the film outlet of the cartridge. The lens-fitted film unit according to claim 2, which holds the film unit. 4. The lid member rotating mechanism resists the urging of the spring by contact with a cam surface formed on the winding knob even when there is no photographic film near the film outlet of the cartridge. The lens-fitted film unit according to claim 3, wherein the lid member is held in the open position. 5. The film detecting lever, wherein the lid member rotating mechanism is rotatably incorporated in the vicinity of a film outlet of a cartridge, and detects the presence or absence of a photographic film in the vicinity of the film outlet by contacting the photographic film. And a cam member formed integrally with the winding knob is rotated, and the film detection lever is rotated in association with the movement of the cam member after releasing the contact with the photographic film to rotate the winding knob. 3. The lens-fitted film unit according to claim 1, further comprising a member for detecting an operation.