JP3375382B2 - Film unit with lens - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film unit with a lens, and more particularly, to a film unit with a lens having a plate for displaying the number of photographed images which advances with the film feed. It is. 2. Description of the Related Art Conventionally, a film unit with a lens (hereinafter referred to as a "film unit") as disclosed in Japanese Patent Publication No. 2-32615 has been provided.
This film unit includes a main body in which a photographic lens, a film wind-down mechanism, and a shutter mechanism are incorporated.
A 135 film with a patrone is housed in a light-tight manner with a rear cover in advance, and the front cover is fixed to the front surface. [0003] The film winding mechanism has a built-in counter mechanism, and this mechanism is provided with a number-of-photographs display plate provided with a remaining number display scale. The number-of-photographs display plate has a disk shape with teeth provided on the outer periphery, and it advances by the pitch of the teeth in accordance with the film winding operation, and can shoot at that time through the display window exposed to the outside Displays the number of appropriate films. When the end indication mark "E" of the number-of-shots display board appears in the display window by the winding operation after the end of the shooting of the last frame, all of the film is put into the cartridge without the film winding stopping mechanism being operated. Completely stored. [0004] A driven sprocket is engaged with the perforation of the film, and a one-tooth gear is integrally formed coaxially with the sprocket. This one tooth gear
Only one V-shaped groove is formed on the outer circumference of the cylinder. The groove engages with the teeth during one rotation in conjunction with the film winding operation, and the number-of-photographs display plate is advanced by one division. Let it. Then, as shown in FIG. 8, the one-tooth gear 2 after one rotation is stopped in a state where the groove 3 faces the tooth 17a of the number-of-photographs display plate 17 in the opposite direction. However, at the time when the film winding operation is completed as described above, the one-gear gear is stopped in a state where the groove of the one-tooth gear is opposed to the teeth of the number-of-photographs display plate. As a result, the circular contour portion of the one-tooth gear is in contact with the teeth of the number-of-photographs display plate. Since this state is not resolved until the next film winding operation is performed after the shutter release, there is a drawback that if the user handles the camera roughly while carrying it, the display of the number of shots is likely to rotate due to vibration or impact. If the number-of-photographs display panel is rotated, not only the correct number of films that can be taken is not displayed, but if the film is rotated in the stepping direction, the remaining number of films that can be taken remains, but the remaining number of the number-of-photographs display board is displayed. Since the scale indicates “E”, there is a possibility that the user has mistakenly recognized that the specified number of images have been taken. In addition, when the remaining number display scale of the number-of-photographs display plate indicates "E", the film winding stopping mechanism is deactivated, and the film having frames that can still be photographed is wound into the cartridge. Therefore, the film is wasted. SUMMARY OF THE INVENTION The present invention has been made in consideration of the above-mentioned problems of the prior art, and provides a film unit with a lens which is devised so as to prevent the rotation of the number-of-photographs display plate in the stepping direction after the film winding operation is completed. The purpose is to provide. [0007] In order to achieve the above object, the number- of- photographs display plate and the one-tooth gear are rotatable.
The supporting shaft is used by the photographic film and patrone during manufacturing.
Integrated with the pre-loaded base with a fixed center distance
The one-tooth gear is always stopped at the rotational position where the tip of the convex tooth of the number-of-photographs display plate enters the concave tooth when the one-frame film feed is completed. According to this,
Since the rotation of the number-of-photographs display plate in the stepping direction is stopped while the one-tooth gear is stopped, the correct number of images can always be displayed. FIG. 2 shows the appearance of a film unit according to the present invention. The film unit 9 is of a type designed to be thinner, and includes a unit main body 10 having a built-in photographing mechanism and the like and an outer case 11 for housing the same. The outer case 11 has a winding knob 12,
In addition to the strobe light emitting unit 13, shutter button 14, lens hood 15, finder 16, etc.
There is a hole for exposing the hole. FIG. 3 shows a state where the unit body 10 is disassembled. The unit main body 10 includes a main body base 18, a rear cover 19, a front cover 20, an exposure unit 21, and a strobe device 22. In the main body base 18, a patrone chamber 25 for storing a patrone and a film chamber 26 for storing an unexposed film are formed on both sides of an exposure opening 24 disposed on the optical axis 23. These bottoms are openings, and are closed by pull-top type bottom covers 19 a and 19 b provided on the rear cover 19. The bottom lid 19b of the film chamber 26 is a lid for inserting a jig or the like for winding the unexposed film from the patrone into a roll when loading the film, and the bottom lid 19b of the patrone chamber 25.
a is a lid for taking out the patrone containing the photographed film after the photographing is completed. At the time of assembly, a 135-film patrone with a patrone is stored in the patrone chamber 25, and an unexposed film drawn out of the patrone and formed into a roll is stored in the film roll chamber 26. Seal tightly. Above the patrone chamber 25, a hoisting knob 12 which engages with the axis of the patrone is provided rotatably. When a winding operation is performed by the winding knob 12, the exposed film is wound into the cartridge. A fixed pitch tooth 1 is provided on the outer circumference of the winding knob 12.
2a is formed and used as an engaging portion for film winding. A non-return claw formed of a leaf spring is engaged with the tooth 12a, and the reverse rotation operation of the hoisting knob 12 is prevented. At the front of the exposure opening 24, a shutter mechanism,
An exposure unit 21 having a film wrapping mechanism, a finder section, and the like, and a strobe device 22 having a battery 27 and a switch piece 28 on the front surface of a film chamber 26 are detachably incorporated by nail coupling, respectively. Cover 20
Is attached to the front surface. On the upper surface of the front cover 20, a display window 29 for exposing the number-of-photographs display plate 17 to the outside and the shutter button 14 are integrally formed. Shutter button 1
Around 14 is provided a slit 14a so as to surround three sides. The slit 14a allows the shutter button 14 to be pushed in with its own elasticity. FIG. 4 is an exploded view of the exposure unit 21. The base unit 30 of the exposure unit 21 includes
An exposure opening 31 is integrally formed on the optical axis 23. A finder holding frame 32 is integrally formed above the base portion 30, and finder lenses 33 and 34 constituting an inverted Galilean finder optical system are incorporated in the finder holding frame 32. On the left side of the finder holding frame 32, a shaft 3
5, 36 and 37 are formed integrally with each other while maintaining a constant center-to-axis distance . These shafts 35, 36, 37 have
The sprocket 38, the shutter set cam 39, the locking lever 40, the kicking lever 41, the drive spring 43, the number-of-photographs display plate 17, and the like are incorporated, respectively, to form a counter mechanism, a shutter mechanism, and a film unwinding mechanism. The sprocket 38 makes one rotation in conjunction with the winding of one frame film. As is well known, the film 44 is provided with perforations 44a, and eight perforations 44a correspond to the length of one frame of the film. An eight-tooth sprocket 38 is engaged with the perforation 44a, and one rotation of the sprocket 38 feeds the film 44 by exactly one frame. The shutter set cam 39 is provided with an annular portion 46 in which a groove 45 is formed at one place on the outer periphery, a cam surface 47 formed below the annular portion 46, and a one-tooth gear 48. And rotates integrally with the sprocket 38. The one-tooth gear 48 is located near a tooth 17 a formed on the outer periphery of the number-of-photographs display plate 17. This tooth 17a
It has a triangular tooth shape. The locking lever 40 is connected to the drive spring 4.
3 and is rotatably incorporated into a shaft 37 through one end 4 thereof.
9 contacts the annular portion 46 of the shutter set cam 39. The kicking lever 41 is rotatably mounted on the shaft 35, and one end 50 of the kicking lever 41 is connected to the shutter set cam 39.
Abuts the cam surface 47 of One end 51 of the driving spring 43 is
It is hung on the bent piece 52 of the locking lever 40 to urge the locking lever 40 clockwise. The other end 53 of the driving spring 43
Is hooked on the spring receiving portion 54 of the kick lever 41,
The kick lever 41 is urged in a counterclockwise direction. When one frame of film is fed by rotating the hoisting knob 12, the shutter set cam 39 makes one turn via the sprocket 38, and the kick lever 41 is initially moved against the bias of the driving spring 43. Rotates from the position to the charging position. At this time, the rotation of the shutter set cam 39 also rotates the one-tooth gear 48, and engages with the teeth 17a formed on the outer periphery during the rotation to move the number-of-photographs display plate 17 by the pitch of the teeth 17a. Then, when the shutter set cam 39 comes to a fixed position after one rotation, one end 49 of the locking lever 40 enters the groove 45, and the locking lever 40 is slightly rotated clockwise, and The one-tooth gear 48 is engaged with the teeth 17a. When the locking lever 40 is rotated clockwise, the locking claw 55 engages with the teeth 12a of the winding knob 12, thereby preventing further film winding operation. At the same time, the projection 56 protruding from the lower surface of the locking lever 40 engages with the locking portion 57 of the kicking lever 41, and holds the kicking lever 41 at the charge position. The operation of the shutter button 14 causes the locking lever 40 to rotate counterclockwise about the shaft 37. When the locking lever 40 rotates by a predetermined angle, the engagement between the projection 56 and the engaging portion 57 is released, and the kicking lever 41 is rapidly rotated counterclockwise by the bias of the driving spring 43.
An L-shaped bent kicking arm 58 is formed integrally with the kicking lever 41. The kicking arm 58 faces the position of the shutter blade 42. The shutter blade 42 includes a kicking arm 58
The claw portion 59 that enters the moving path of, the opening and closing portion 60 that opens and closes the exposure opening 31, and the hole 61 that is the center of rotation are provided integrally. By fitting the shaft 62 into the hole 61,
It swings along a direction orthogonal to the optical axis 23 direction.
This swinging is performed between the position where the opening / closing portion 60 opens and closes the exposure opening 31 when the claw portion 59 is kicked off by the kicking arm 58, and usually the position where the exposure opening 31 is closed by the spring 63. Has been energized. An aperture 6 is provided in front of the shutter blades 42.
The shutter cover 66 on which 5 is formed is attached. The shutter cover 66 has two photographing lenses 67 and 68.
And a spacer 69 inserted between them, and a lens cover 70 exposed from the lens hood 16 to the outside. As shown in FIG. 1, the one-tooth gear 48 has a shape in which a V-shaped groove is provided in a cylindrical contour, and the V-shaped groove has two sides 72 forming the V-shaped groove. , Out of 73
One side 72 has a length longer than the other sides 73 of the. Shutter set cam 39 in conjunction with film feed
Is rotated, the longer side 72 pushes the teeth 17a during this rotation to advance the number-of-photographs display plate 17, and the side 72 linearly presses the triangular tooth 17a. Smooth transmission can be performed. When the film winding operation is completed, the short side 73 is engaged with the teeth 17a of the number-of-photographs display plate 17.
By this engagement, the number-of-photographs display plate 17 is prevented from rotating in the stepping direction (clockwise). That is, the one-tooth gear 48
Assuming that the concave teeth and the teeth 17a of the number-of-photographs display plate 17 are convex teeth,
Upon completion of one frame feed of the film, the concave tooth is
The one-tooth gear 48 always stops at the rotational position where
During the stop, the rotation of the number-of-photographs display plate 17 in the stepping direction is prevented.
Stop. A scale 74 for displaying the number of images is printed on the upper surface of the number-of-images display plate 17 in accordance with the rotation pitch. On the scale 74, the number of frames of the film that can be photographed, that is, the remaining number display scale is printed in order from 39 to 1, and ends with the scale "E" indicating the end of photographing. By observing the scale 74 through the display window 29 formed in the front cover 20, the number of remaining frames of the film that can be photographed can be confirmed. An arc-shaped rib 75 is integrally provided on the lower surface of the number display plate 17. A convex portion 76 protruding toward the inside of the arc is formed on a part of the rib 75.
When the film winding operation is performed after the photographing of the last frame of the film, the rising piece 77 provided on the locking lever 40 is hooked on the projection 76. As a result, as shown in FIG. 5, the convex portion 76 prevents the locking lever 40 from rotating when the claw 49 is not fitted into the groove 45 of the shutter set cam 39. When the locking lever 40 is in the state shown in the figure, the rotation of the sprocket 38 and the winding knob 12 becomes free, so that the remaining film can be wound into the cartridge without charging the shutter. The operation of the thus-configured film unit with lens will be described. Unused film units with lenses are marked with the specified number
Scale 74 appears. For this reason, the photographer must
By observing No. 9, it can be confirmed that the film unit with lens is in an unused state. In the film unit with lens in this state, as shown in FIG. 6, the rising piece 77 of the locking lever 40 and the rib 75 provided at the lower part of the number-of-photographs display plate 17 are not engaged. The rotation of 40 is allowed. First, the photographer turns the winding knob 12 in preparation for photographing to charge the shutter of the film unit with the lens. When the shutter charge is performed, the number-of-photographs display plate 17 corresponds to one scale in synchronization with the film feed.
It rotates in the stepping direction, and "39" is displayed at the center 29a of the display window 29.
Indicates that the remaining 39 frames can be photographed. At the time when the winding operation is completed, the one-tooth gear 48 is engaged with the teeth 17a of the number-of-photographs display plate 17 to prevent the rotation of the number-of-photographs display plate 17 in the stepping direction (clockwise). When the shutter charge is completed, the locking claw 55 of the locking lever 40 meshes with the teeth 12a of the winding knob 12, and the winding operation of the winding knob 12 is prohibited. When the shutter button 14 is pressed from the shutter charged state, a rod (not shown) formed integrally with the shutter button 14 presses the bent piece 52 counterclockwise. As a result, the locking lever 40 is rotated counterclockwise. When the locking lever 40 rotates in this manner, the engagement between the projection 56 of the locking lever 40 and the locking portion 57 of the kicking lever 41 is released as shown in FIG. 7, and the kicking lever 41 is attached to the drive spring 43. It rotates counterclockwise by force. Then, the shutter blades 42 are opened and closed by the rotation of the kick lever 41, and the film 44 set in the exposure opening 24 is exposed. When the locking lever 40 rotates counterclockwise to open and close the shutter blade 42, one end 49 of the locking lever 40 comes out of the groove 45 of the shutter set cam 39. Then, the engaging portion 57 of the kick lever 41 is engaged with the upper edge of the projection 56 of the locking lever 23, whereby the locking lever 40 is held at the same position against the bias of the driving spring 43. . The locking claw 5 of the locking lever 40
5 is to retract from the teeth 12a of the hoisting knob 12,
The winding operation of the winding knob 12 is allowed. When the winding knob 12 is rotated after one photographing operation is completed, the axis of the patrone is rotated via a fork connected to the winding knob 12 so that the photographed film 44 is placed in the patrone. Get involved. The sprocket 38 is rotated by the film 44 being wound around the cartridge, whereby the shutter set cam 39 is rotated clockwise. When the shutter set cam 39 rotates, one end 50 of the kicking lever 41 is pushed by the cam surface 47, and the kicking lever 41 rotates clockwise. The rotation of the kicking lever 41 disengages the engaging portion 57 from the upper edge of the projection 56 of the locking lever 23, and simultaneously engages the locking lever 4 with the groove 45 that is rotating.
The shutter charge is performed by fitting one end 49 of the zero. When the photographing of the last frame is completed, the display window 2
At this time, the scale of “1” is projected at the center 29a of 9. Thereafter, the film winding operation is performed in the same manner as described above. As a result, as shown in FIG.
7 rotates by one tooth, the projection 76 comes into contact with the rising piece 77 of the locking lever 40, and the locking lever 40 is moved so that one end 49 of the locking lever 40 does not fit into the groove 45 of the shutter set cam 39. 40 is prevented from rotating. When the locking lever 40 is in such a state, the rotation of the sprocket 38 becomes free. Therefore, even if the winding knob 12 is rotated in this state, the winding is not stopped, and the film 44 is sequentially turned. You can get involved. When all the films are wound into the cartridge by the turning operation of the winding knob 12, the number-of-photographs display plate 17 advances by several scales, and the scale 74 of "E" appears in the display window 29. When all the frames of the negative film of the film with a patrone are finished, the film unit 2 is sent to the developing laboratory as it is. At the photo lab, the cartridge containing the exposed film 44 is taken out and subjected to processing such as development and printing using the current development processing system, and the print photograph and the film negative are returned to the user. By the way, industrial products are recycled to protect the environment and reduce industrial waste. Generally, this recycling includes the conversion of parts into raw materials and the reuse of parts as they are for new industrial parts. In the early stages of the sales of film units, empty film units were discarded, but recently, the main body, front cover, and rear cover have been dissolved into resin pellets. The exposure unit 21 is reused after performing a function test. In the film unit 2, since the exposure unit 21 can be easily removed without being damaged or damaged, it can be reused. In the function test of the exposure unit 21, it is necessary to return the number-of-photographs display plate 17 to the start position. Therefore, in the film unit 2 of the embodiment, when the film winding operation is completed, the rotation of the number-of-photographs display plate 17 in the stepping direction is prevented by the one-tooth gear 48, and the rotation in the reverse direction is prevented. I try not to. For this reason,
If the number-of-photographs display plate 17 is rotated in the direction opposite to the stepping direction in the function inspection process, it can be easily returned to the stout position. When the number-of-photographs display plate 17 is rotated in a direction opposite to the stepping direction due to vibration or impact when carrying the camera, the film 74 is displayed even though the scale 74 of the number-of-photographs display plate 17 does not indicate “E”. There is a risk that all of 44 will be caught in the patrone and the winding operation will be idle. However, in this case, there is no problem because the photographing for the specified number of images is surely performed. In the above embodiment, the rotation of the number-of-photographs display plate 17 in the stepping direction is prevented. However, the present invention is not limited to this, and the rotation in both directions may be prevented. In this case, the one-tooth gear may be formed in such a shape that the V-shaped groove of the one-tooth gear is securely engaged with the teeth 17 of the number-of-photographs display plate 17. As described above, according to the film unit with the lens of the present invention, the completion of one frame feed of the film is achieved.
The rotation that the tip of the convex tooth of the number-of-photographs display plate enters the concave tooth
The one-tooth gear is always in standby at the position.
While the gear is stopped, the number of shots display plate is
Because it is actually blocked, you can always display the correct number of sheets
You. In addition, vibration and shock are applied to the film unit with lens.
The number display board does not move even if
The reliability of number display can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing the state of the number-of-photographs display plate and the one-tooth gear after the film winding operation of the present invention is completed. FIG. 2 is a perspective view showing an appearance of a film unit with a lens. FIG. 3 is an exploded perspective view of a unit main body. FIG. 4 is an exploded perspective view of the exposure unit. FIG. 5 is an explanatory diagram of a shutter mechanism showing a state in which photographing has been completed for all films. FIG. 6 is an explanatory diagram of a shutter mechanism showing a shutter charge state. FIG. 7 is an explanatory diagram of a shutter mechanism showing a state after a shutter release. FIG. 8 is a plan view showing the state of the number-of-photographs display plate and the one-tooth gear after the completion of the film winding operation described in the related art. [Description of Signs] 12 Winding knob 14 Shutter button 17 Number of shots display plate 18 Main body base 21 Exposure unit 39 Shutter set cam 40 Locking lever 41 Kicking lever 48 One-tooth gear 74 Scale

──────────────────────────────────────────────────続 き Continuation of front page (56) References JP-A-1-214832 (JP, A) JP-A-3-2337 (JP, U) JP-A 5-27744 (JP, U) JP-A 57- 108222 (JP, U) JP-A-2-51341 (JP, U) JP-A 36-10348 (JP, Y1) JP-A 33-18734 (JP, Y1) (58) Fields surveyed (Int. Cl. ^7, DB name) G03B 17/18 - 17/20 G03B 17/36 G03C 3/00 575

Claims (1)

(57) [Claim 1] One concave tooth is formed on the outer periphery, and a one-tooth gear that rotates once in conjunction with one-frame feed of a film and a convex tooth that meshes with the one-tooth gear are provided. A number-of-photographs display plate arranged at a constant pitch, and the rotation of the one-tooth gear causes the number-of-photographs display plate to advance by one pitch of the convex teeth to display the number of photographed images at that time through a display window In the film unit with a lens, the number-of-photographs display plate and the one-tooth gear can be rotated freely.
The supporting shaft is used when the photo film and patrone are
Integrated with the pre-loaded base with a fixed center distance
The one-gear gear is always stopped at the rotation position where the tip of the convex tooth of the number-of-photographs display plate enters the concave tooth when the one-frame film feed is completed, and the one-gear gear is stopped. Is a film unit with a lens, which prevents rotation of the number-of-photographs display plate in the stepping direction.