JPH0843880A - Film unit with lens - Google Patents

Abstract

PURPOSE:To provide a film unit with a lens capable of surely releasing a shutter at the time of depressing a shutter button. CONSTITUTION:The film unit with the lens having a shutter locking releasing lever 146 of a cantilever transmitting force generated by the depressing of the shutter button 5 to a shutter locking lever locking a shutter driving lever for opening and closing a shutter blade is constituted by providing a fulcrum structure which does not actually generate a torsional moment even if the force is applied to the shutter locking releasing lever 146 on its fixed end part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film unit with a lens, and more specifically, to a shutter release mechanism for performing a reliable shutter release and, when an automatic film feed mechanism is provided, an automatic feed mechanism The present invention relates to a film unit with a lens that can reliably switch on.

[0002]

2. Description of the Related Art An inexpensive film unit with a lens is provided so that a user can easily obtain a camera and take a picture even if he forgets to carry the camera. This lens-equipped film unit is equipped with a simple photographing mechanism including a photographing lens and a shutter, as well as a strobe device and a film winding mechanism, and a cartridge equipped with an international standard (ISO 1007-2079 version). It has a built-in film, is small and has excellent portability. Users who purchase this can easily enjoy taking pictures even indoors or in dark places.In addition, after the end of the shooting, they can hand over the whole unit to the development store without taking out the photographic film already taken. It has the advantage that it is only necessary to request the development, and it is not necessary to perform troublesome operations such as rewinding the film or taking out the cartridge. In such a film unit with a lens, a cartridge and a film drawn from the cartridge are stored in a roll form,
Each time a photo is taken, the film winding film is wound into the patrone by rotating the winding knob directly connected to the spool of the patrone.
And engage the perforation of the film,
The frame is wound to rotate the driven sprocket once and the cam that rotates coaxially with the driven sprocket for shutter charging and film winding stop. It is configured so that it cannot be done. Therefore, if the user forgets to wind the film, he may miss the photo opportunity.

In order to eliminate such an adverse effect, there has been proposed a film unit with a lens provided with an automatic film feeding mechanism for automatically winding a film after shutter release using a motor like a general compact camera.

[0004]

However, in the lens-fitted film unit having such a structure, the shutter locking lever that locks the shutter drive lever that opens and closes the shutter blade is generated by pressing down the shutter button. There is a shutter lock release lever that releases the lock of the shutter drive lever by transmitting the generated force, but the force applied to the shutter lock release lever in the form of a cantilever formed of a thin plate is May cause an eccentric load. In such a case, when the shutter button is pushed down, a torsional moment acts on the shutter lock release lever, which makes it difficult to accurately specify the vertical displacement amount of the shutter lock release lever. Therefore, there is an adverse effect that the shutter release may not be surely performed. Further, in the film unit with a lens having the automatic film feeding mechanism, not only the shutter release but also the ON / OFF of the switch of the automatic feeding mechanism are configured to depend on the vertical displacement of the shutter lock release lever. However, as described above, it is difficult to accurately specify the amount of vertical displacement of the shutter lock release lever.
There is an adverse effect that there are cases where it cannot be reliably turned off.

[0005]

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a film unit with a lens which can surely perform shutter release when the shutter button is pressed. Another object of the present invention is to provide a lens-equipped film unit having a film automatic feeding mechanism, which can surely turn on the shutter release and the switch of the automatic feeding mechanism when the shutter button is pressed. It is a thing.

[0006]

The object of the present invention is to lock the shutter drive lever by transmitting the force generated by pressing the shutter button to the shutter lock lever which locks the shutter drive lever for opening and closing the shutter blades. In a film unit with a lens including a cantilever shutter release lever for releasing, a fulcrum structure that does not substantially generate a twisting moment even when a force is applied to the shutter release lever is a shutter. This is achieved by a film unit with a lens, which is provided at the fixed end of the unlocking lever. In a preferred embodiment of the present invention, a lens-equipped film unit is configured so that a switch is turned on when a force generated by pressing down a shutter button is transmitted to the shutter locking lever. It has a mechanism. In a further preferred aspect of the present invention, the fulcrum structure is constituted by a groove having a U-shaped cross section.

[0007]

According to the present invention, the fulcrum structure which does not substantially generate a torsional moment even when a force is applied to the cantilever shutter release lever is a fixed end portion of the shutter release lever. Therefore, even if an eccentric load acts on the shutter lock release lever when the shutter button is pressed, the shutter lock release lever is elastically deformed with the fulcrum structure as a fulcrum. The vertical displacement amount can be easily specified. As a result, shutter release can be reliably performed when the shutter button is pressed. Further, according to the preferred embodiment of the present invention, in the lens-equipped film unit including the automatic feeding mechanism, the switch of the automatic feeding mechanism can be surely turned on.

[0008]

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 is a schematic perspective view showing the external appearance of a film unit with a lens according to an embodiment of the present invention. In FIG. 1, a lens-equipped film unit 1 according to an embodiment of the present invention is configured to be capable of automatically winding a film, and as will be described later, a unit main body 2 having a photographing mechanism and the like, and a unit main body 2 It is provided with an outer case 3 for storing. A description of how to use the film unit with a lens 1 is printed on the surface of the outer case 3, and the outer case 3 has a strobe light emitting unit 4, a shutter button 5, a main switch knob 6, and a number-of-photos display plate 7. , An opening for exposing the viewfinder 8, the taking lens 9, a strobe charging switch 10 that is operated when the strobe is charged, and the light of the neon tube 11 that blinks when the strobe unit is fully charged. Openings that lead to the are respectively formed. In the vicinity of the opening that exposes the main switch knob 6 to the outside, the letters "ON" correspond to the ON position of the main switch knob 6 and "OF" correspond to the OFF position.
The letter "F" is printed. A portion of the outer case 3 below the shutter button 5 is projected to the front side corresponding to a grip portion described later. Main switch knob 6
When in the ON position, enables the motor for automatic film winding, which will be described later, while turning it OFF.
When in position, it prevents the motor from being driven.

FIG. 2 is a schematic exploded perspective view of the unit main body 2 of the lens-fitted film unit 1. As shown in FIG. 2, in this embodiment, the unit body 2 includes a body portion 12, an exposure unit 13, a strobe unit 14,
The battery 15, a motor unit 16 in which a deceleration transmission mechanism and a motor are integrated, a switch 17, a front cover 18 and a rear cover 19, and a film 20 with a cartridge are detachably attached by claw engagement. It is installed. The front cover 18 has, on the optical axis 21, an opening 9a for exposing the taking lens 9 to the outside, a strobe opening 4a for exposing the strobe light emitting portion 4 of the strobe unit 14, and a viewfinder objective. Window 8a
Also, a strobe charging switch 10 for charging the strobe unit 14 and a charging confirmation hole 11a for guiding the light of the neon tube 11 to the outside are formed. Further, a grip portion 22 projecting to the front side is formed on the lower portion of the shutter button 5 of the front cover 18 so that the user can grip the grip portion 22 and take a picture. Has been done. In the main body portion 12, on both sides of the exposure opening 23 arranged on the optical axis 21, a cartridge storage chamber 24 for storing the cartridge 20a, and a film for storing the film roll 20c formed by winding the film 20b in advance. A roll storage chamber 25 is formed. The front of the outer wall of the cartridge storage room 24 is a film roll storage room 25.
The outer wall has a shape protruding forward from the front surface. An aperture (not shown) that defines the exposure range of the film 20b is formed on the back side of the body portion 12.

FIG. 3 is a schematic exploded perspective view of the motor unit 16 and the switch 17 for film winding. As shown in FIG. 3, a motor unit storage chamber 26 for storing the motor unit 16 is formed on the side of the cartridge storage chamber 24. The motor unit 16 is inserted into the motor unit storage chamber 26 from above or from the front and is pushed toward the cartridge storage chamber 24 side, whereby the engagement claws 2 projecting from the side surface of the cartridge storage chamber 24 are provided.
7a, 27b, 27c, and 27d are engaged and attached. At this time, the projection 28a and the pin 28 also formed on the side surface of the cartridge storage chamber 24 at the same time.
b is engaged with a hole or groove formed in the motor unit 16 to perform positioning. Motor unit storage room 26
The front of the is covered with a grip portion 22 formed on the front cover 18. FIG. 4 is a schematic exploded perspective view of the motor unit 16. As shown in FIG. 4, the motor unit 16 includes a motor 30 as a drive source for film winding, a gear group 31 that decelerates and transmits the rotation of the motor 30, a holding frame 32 that holds these, and a gear. The top plate 33 holds the group 31 from above. In the motor 30, the main switch knob 6 is
When it is located at the OFF position, it is not driven, and only when it is located at the ON position, it is driven.

A gear support portion 34 is provided on the upper portion of the holding frame 32.
However, a motor supporting portion 35 is formed in the lower portion, and a plate-shaped elastically deformable connecting portion 36 is formed between the gear supporting portion 34 and the motor supporting portion 35. Engaging claws 27a to 27d formed in the motor unit storage chamber 26
Are engaged with the connecting portion 36. In this embodiment, as the motor 30, a low-priced motor used as a power source for a model or the like is used. The gear support portion 34 is formed with a hole 34a into which the rotary shaft 30a of the motor 30 can be inserted, and the motor support portion 35 is formed with a hole 35a having the same shape as the protrusion formed at the bottom of the motor 30. Has been done. Therefore, as shown in FIG.
With the holding frame 32 deformed, the rotating shaft 3 of the motor 30
0a into the hole 34a from below, and the head 37 of the motor 30 is
The motor 30 is fixed by inserting the motor 30 so as to be inserted into the recess formed in the lower surface of the gear support portion 34 by using the elastic force of the connecting portion 36. When the motor 30 is fixed, the rotary shaft 30a of the motor 30 inserted into the hole 34a projects upward from the gear support portion 34, and the projected rotary shaft 30a has a gear 38.
Is attached. Gears 45, 46, 47, 48, 49 are inserted into the bearing holes 40, 41, 42 and the shafts 43, 44 formed on the upper surface of the gear support portion 34. Each of these gears 45 to 49 has two spur gears formed on the upper and lower sides, and is configured to reduce the rotation of the motor 30 by meshing these gears.

Two engaging claws 50 projecting downward are formed on the top plate 33, are engaged with the gear supporting portion 34, and are attached to the holding frame 32. At this time, the gears 45, 46, and 4 are inserted into the five holes 51 formed in the top plate 33.
7 and the upper portions of the shafts 43 and 44 are inserted, the distance between the shafts of the gears 45 to 49 is maintained, and the rotation of the motor 30 can be reliably transmitted. As shown in FIGS. 3 and 4, two protrusions 52 and 53 are formed on the surface of the top plate 33 on the opposite side where the engaging claws 50 are formed. An operation plate 54 integrally formed with the main switch knob 6 is accommodated between the protrusions 52 and 53 so as to be slidable along the protrusions 52 and 53. On both sides of the operation plate 54,
The pair of convex portions 55 are formed, and the pair of convex portions 55 are
Recesses 56 and a pair of recesses 57 formed on the protrusions 52 and 53.
Engaged with. When the pair of convex portions 55 and the pair of concave portions 57 are engaged with each other, the main switch knob 6 is moved to the position shown in FIG.
As shown in, the lens-equipped film unit 1 is located in the “ON” position, and the film is immediately wound up when the photographing operation is performed. Further, when the pair of convex portions 55 and the concave portion 56 are engaged, the main switch knob 6 is located in the “OFF” position, and the lens-equipped film unit 1 winds the film even if the photographing operation is performed. Is not done.

As shown in FIG. 3, a winding gear 60 is rotatably attached to the upper portion of the cartridge storage chamber 24. A bearing opening 61 is formed on the upper surface of the cartridge storage chamber 24, and a drive shaft 62 formed on the lower surface of the winding gear 60 is inserted into the bearing opening 61. A tooth row 62a that meshes with the spool 20d (see FIG. 2) of the cartridge 20a is formed at the end of the drive shaft 62, and the spool 20d is rotated by the rotation of the winding gear 60.
Is rotated, and the film 20b is put in the cartridge 20a.
Is configured to be rolled up. Winding gear 60
A shaft 63 is formed on the upper surface of the. This shaft 63
When the motor unit 16 is attached to the main body portion 12, it is inserted into the hole 64 formed in the top plate 33. The winding gear 60 is meshed with the lower gear 49a of the gear 49 of the motor unit 16 so that the axial distance between the gear 49 and the winding gear 60 is kept constant. As a result, the motor 30
Rotation is reduced at a predetermined reduction ratio and transmitted to the spool 20d. A boss 65 is formed on the upper surface of the cartridge storage chamber 24 in addition to the bearing opening 61.
The switching lever 66 is rotatably inserted.
The switching lever 66 is provided with a shaft portion 67 inserted into the boss 65 and an L-shaped arm portion 68 protruding upward. The arm portion 68 is at a position where it is pressed by the protruding portion 54a protruding from the operation plate 54 when the operation plate 54 is located at the “OFF” position,
The switching lever 66 is rotated counterclockwise in FIG. Further, the switching lever 66 is provided with an elongated hole-shaped engaging portion 69 and a protruding portion 70. A pin 72 formed on a locking lever 71 assembled to the exposure unit 13 is inserted into the engaging portion 69, and the protruding portion 70 is formed.
An engaging member 73 forming a part of the switch 17 is in contact with the.

FIG. 5 is a schematic side view of the switch 17 when the shutter button 5 is operated. As shown in FIGS. 3 and 5, the switch 17 includes a resin holder 75.
The three metal contact pieces are attached to each other so as to be insulated from each other, and the holder 75 is engaged with the engaging claws 24 a formed on the side wall of the cartridge storage chamber 24, so that the main body portion 12 is attached. It is attached. Of the three contact pieces, a contact portion 76a bent in an arc shape is formed at the upper end of the first contact piece 76 arranged in the center. Also, the first contact piece 7
A projecting piece 76b is formed so as to project upward from the side of 6, and an engaging member 73 is attached to the tip of this projecting piece 76b. The engaging member 73 is made of plastic and is formed into a cylindrical shape. The engaging member 73 is pressed to the back side by the rotation of the switching lever 66, and deforms the first contact piece 76 to the back side. The second contact piece 77 is arranged on the front surface side of the first contact piece 76. From the side of the second contact piece 77, a protruding piece 77a
Are formed so as to project downward. The lower end of the projecting piece 77a is formed in an arc shape toward the first contact piece 76 side.

On the back side of the first contact piece 76, a third contact piece 78 having an arc-shaped contact portion 78a formed at its tip is arranged. These first contact piece 76, second contact piece 77, third contact piece 7
8 includes a motor 30 and a battery 15 as shown in FIG.
And are connected. FIG. 6 is a schematic side view of the switch 17 when the motor is driven, and FIG. 7 is a schematic side view of the switch 17 when the motor is stopped. As shown in FIG. 6, when the contact portion 76a of the first contact piece 76 and the second contact piece 77 contact each other, the circuit is closed and the motor 30
Is driven. Further, as shown in FIG. 7, when the first contact piece 76 and the contact portion 78a of the third contact piece 78 are in contact with each other, the motor 30 is short-circuited and the driving of the motor 30 is stopped. FIG. 8 is a schematic exploded perspective view of the exposure unit. As shown in FIG. 8, in the base portion 85 of the exposure unit 13, an exposure opening 86 provided on the front side of the optical axis 21, two shafts 87 and 88, and a bearing opening 89 are integrally formed. There is. The shaft 87 has a shutter drive lever 90.
And the number-of-photos display plate 7 are rotatably inserted, and the snap ring 9
It is prevented from falling out by 1. Further, the shaft 92 has a spring 92
And the locking lever 71 are rotatably inserted and prevented from coming off by screws 93. The rotating member 94 is inserted into the bearing opening 89.

A winding stop cam 94a, a shutter charge cam 94b, a shaft 94c projecting downward, and a one-tooth gear 94d projecting upward are integrally formed in the central portion of the rotating member 94. A driven sprocket 95 arranged in the base portion 85 is engaged with the shaft 94c, and the rotation of the driven sprocket 95 is transmitted. The tooth row 7a formed on the outer periphery of the number-of-photographs display plate 7 meshes with the one-tooth gear 94d. The driven sprocket 95 is meshed with a perforation formed outside the photographing range of the film 20b (see FIG. 2), and the spool 20d of the cartridge 20a is rotated by the rotation of the winding gear 60, and the film 20b is rotated.
Is moved by the length of one frame, the driven sprocket 95 makes one rotation. One end 92a of the spring 92 is
The shutter drive lever 90 is engaged with the locking portion 90a of the shutter drive lever 90, and the shutter drive lever 90 is mounted around the shaft 87 as shown in FIG.
In, it is biased counterclockwise. Also, the spring 92
The other end 92b of the lock lever 71 engages with the vertical piece 71a of the locking lever 71 to urge the locking lever 71 around the shaft 88 in the clockwise direction in FIG. Shutter charge cam 9
The one end 90b of the shutter drive lever 90 is in contact with 4b, and the rotation of the driven sprocket 95 causes the shutter drive lever 90 to resist the bias of the spring 92, so that the shutter drive lever 90 is rotated.
At, rotate clockwise.

A groove 94e is formed on the outer circumference of the winding stop cam 94a.
Is formed, and the claw portion 71b of the locking lever 71 is fitted into the groove 94e when the film is fed one frame and the rotating member 94 makes one rotation.
As a result, the rotation of the driven sprocket 95 is locked, and the winding of the film 20b is prevented. Further, since the claw portion 71b of the locking lever 71 fits into the groove 94e, the locking lever 71 slightly rotates clockwise in FIG. By this rotation, the protrusion 71c of the locking lever 71 causes the rising piece 90 of the shutter drive lever 90 to rise.
The shutter drive lever 90 is held in the charging position by engaging with c. It should be noted that one rotation of the driven sprocket 95 causes the one-tooth gear 94d to rotate the photographed number display plate 7 by one scale. When the locking lever 71 is rotated clockwise in FIG. 3, the pin 7 of the locking lever 71 is rotated.
2 rotates the switching lever 66 counterclockwise in FIG. As a result, the first switch 17
The engaging member 73 of the contact piece 76 is pressed toward the back side, and the first contact piece 76 is brought into contact with the third contact piece 78 as shown in FIG. 7.

When the shutter button 5 is pushed down, the locking lever 71 is slightly rotated around the shaft 88 in the counterclockwise direction in FIG. By this rotation, the protrusion 71c of the locking lever 71 is disengaged from the rising piece 90c of the shutter drive lever 90, and the shutter drive lever 9
0 is rotated counterclockwise in FIG. 8 around the shaft 87 by the urging force of the spring 92, and the kicking arm 90d of the shutter drive lever 90 kicks the shutter blade 96 described later. When the locking lever 71 is rotated counterclockwise in FIG. 3, the switching lever 6
6 is released from the pressing force of the pin 72, and the first contact piece 76 is released.
Returns to the position on the second contact piece 77 side by its own elasticity. At this time, when the shutter button 5 is not pushed down, the first contact piece 76 and the second contact piece 77 are brought into contact with each other, and the motor 30 is rotated. A shaft 97 is formed on the front surface of the base portion 85 in parallel with the optical axis 21. A crank-shaped shutter blade 96 is rotatably attached to the shaft 97. The shutter blades 96 are springs 10.
The biasing force of 3 causes the exposure opening 86 provided on the optical axis 21 to be shut off, and the shutter driving lever 90 kicks the shutter to move it between the retracted position and the retracted position.

A shutter cover 98 is attached to the front surface of the shutter blades 96, and the shutter blades 96 are attached to the optical axis 2.
It is prevented from swinging in the direction of 1. The shutter cover 98 has a diaphragm opening 98a formed on the optical axis 21, and the lens barrel 9 surrounds the diaphragm opening 98a.
8b is integrally formed. In the lens barrel 98b, a rear lens 99 and a front lens 100 forming the taking lens 19 and a spacer 101 sandwiched between them are inserted, and finally, a lens cover 102 is covered.
A concave holding frame 110 is integrally formed on the upper right side of the base portion 85. The holding frame 110 includes the objective lens 1
04a and the eyepiece 104b are inserted to form an inverted Galileo type finder 8. Finder 8
2 is disposed between the finder objective window 8a of the front cover 18 and the finder eyepiece window 8b of the rear cover 19, as shown in FIG. The rear cover 19 is provided with a film supporting surface 105 at a position facing an aperture (not shown).
Are formed. On top of the film support surface 105,
A finder eyepiece window 8b is formed, and framing is performed through this window during photography. An upper plate 106 protruding forward is formed at an upper edge portion of the rear cover 19, and the upper plate 106 is the upper plate 107 of the front cover 18.
It has a shape that fits into the notch 107a formed in the. When the upper plate 106 of the rear cover 19 and the upper plate 107 of the front cover 18 are fitted to each other, as shown in FIG. 2, the main switch knob 6 is exposed to the outside by the notch formed in both. The opening 108 and the display window 109 for exposing the number-of-photographed display plate 7 to the outside are formed. On the bottom side of the rear cover 19, a cartridge storage room 24
Pull-top lids 19a and 19b are provided to cover the bottom of the film roll chamber 25 and the film roll chamber 25, respectively. Lid 19
a is used as a take-out lid when taking out the cartridge 20a containing the film 20b.

The front cover 18 has an opening 9a for exposing the taking lens 19 to the outside on the optical axis 21, a strobe opening 4a for exposing the light emitting portion 4 of the strobe unit 14 to the outside, and a viewfinder objective window. 8a and a strobe charging switch 10 for charging the strobe unit 14 are formed. When the strobe charge switch 10 is pressed, the charging contact piece 121 arranged behind the strobe charge switch 10 is brought into contact with the board 122 of the strobe unit 14, and the contacts 123 and 124 on the board 122 are short-circuited to cause the strobe circuit. It is designed to be charged. FIG. 9 is a schematic perspective view of a shutter mechanism including the shutter button 5. As shown in FIG. 9, the shutter button 5 is
It has a cylindrical shape, and a flange 5a and a pressing pin 5b protruding downward are formed on the lower portion thereof. On the upper plate 107 of the front cover 18, an opening 140 for a shutter button and a protrusion 141 surrounding the opening 140 are formed on the lower surface, and the shutter button 5 has this opening 14
0 is inserted from below, but the ridge 141 and the flange 5a
Since and are in contact with each other, they do not come out upward. Below the shutter button 5, an intermediate lever 143, which is inserted into a pin 142 protruding toward the rear side and is rotatably attached, is arranged inside the front cover 18. A pressing lever 144 that protrudes downward is integrally formed at the tip of the intermediate lever 143.
An engaging portion 145 protruding upward is integrally formed at an intermediate portion of 43. A pressing piece 144a is formed on the front end portion of the pressing lever 144 toward the back side, and the pressing piece 144a abuts on the protruding piece 77a formed on the second contact piece 77 of the switch 17 described above, It is transformed to the back side.

FIG. 10 is a schematic perspective view of the vicinity of the shutter mechanism of the unit main body 2, and FIG. 11 is a schematic sectional view taken along the line AA. As shown in FIG. 10, a locking release lever 146 is integrally formed on the upper plate 107 of the front cover 18. The lock release lever 146 is in the form of a cantilever, and a groove 1 having a U-shaped cross section is provided near the fixed end of the lock release lever 146 as shown in FIG.
46a is formed. Further, as shown in FIG. 9, the lock release lever 146 includes a pressing portion 146 b for pressing the vertical piece 71 a of the lock lever 71, and the intermediate lever 14 a.
A claw portion 146c that engages with the third engagement portion 145 is formed. The rigidity of the lock release lever 146 is set so that the displacement amount of the pressing portion 146b, which is displaced downward in the vertical direction by the force applied to the claw portion 146c via the intermediate lever 143 when the shutter button 5 is pushed down, becomes a predetermined value. , Set. When the shutter button 5 is pushed down, the pressing pin 5b formed on the lower portion of the shutter button 5 pushes the intermediate lever 143 downward. The intermediate lever 143 pressed by the shutter button 5 is rotated clockwise about the pin 142. As a result, the claw portion 146c engaged with the engaging portion 145 is pushed downward, and the locking release lever 14
6 is pushed down around the connecting portion 146a with the front cover 18. When the lock release lever 146 is pushed down,
The pressing portion 146b pushes the vertical piece 71a of the locking lever 71 to rotate the locking lever 71 slightly counterclockwise in FIG. As a result, shutter release is performed by the shutter drive lever 90.

Since the pressing lever 144 is also moved downward while the shutter button 5 is being pressed down, the contact between the pressing piece 144a and the protruding piece 77a of the second contact piece 77 is released, The second contact piece 77, due to its own elasticity,
It returns in the direction away from the first contact piece 76. This allows
While the shutter button 5 is being pushed down, the first contact piece 76 and the second contact piece 77 do not come into contact with each other, so that the film is not wound. Also, shutter button 5
When the pushing down of is released, the pressing lever 144 moves upward, but since the lower end of the protruding piece 77a of the second contact piece 77 is formed in an arc shape, the pressing lever 144 and the protruding piece 77a are separated from each other. , Make a smooth contact. A battery contact piece 150 that contacts the positive terminal 15 a of the battery 15 and a negative terminal 15 are provided below the board 133 of the strobe unit 14.
A battery contact piece 151 that comes into contact with b is attached.
These battery contact pieces 150 and 151 are connected to the strobe circuit, and in addition to the motor unit 16 and the switch 17,
The battery 15 is also connected to the strobe unit 1
4 and the motor unit 16 are drive sources. Here, since the motor 30 is configured to be driven by the DC power source, the rotation direction changes depending on the direction of the battery 15 to be connected. As shown in FIG. 2, when the battery 15 is correctly loaded, the rotating shaft 3 of the motor 30
0a is rotated counterclockwise in FIG. 4, but when the battery 15 is loaded in the reverse direction, the rotation shaft 30a is rotated clockwise, and the film 20b cannot be wound in the cartridge 20a. Therefore, in this embodiment, as shown in FIG. 2, the protruding piece 153 is provided in the portion of the main body portion 12 where the battery contact piece 150 is arranged. According to this structure, as shown in FIG. 12, which is a schematic perspective view of the battery 15 loaded from the bottom, the protruding piece 153 is located in front of the battery contact piece 150. Although the positive terminal 15a protruding from 15 can be loaded, if the negative terminal 15b is loaded on the side of the battery contact piece 150, the positive terminal 15a cannot be loaded. You can be sure to notice.

The lens-fitted film unit 1 according to the embodiment of the present invention configured as described above operates as follows. The lens-fitted film unit 1 is made into a unit body 2 by manufacturing each part by plastic molding and assembling them. When the battery 15 is loaded into the unit main body 2, as shown in FIG. 11, since the projecting piece 153 formed on the main body portion 12 is located in the vicinity of the battery contact piece 150, the battery contact piece 150 side. Only the positive contact 15a of the battery 15 can be loaded in the battery 1. Therefore, erroneous loading of the battery 15 can be reliably prevented, and the battery 1
5 can be loaded. After undergoing various inspections, the unit body 2 in which the battery 15 is loaded is covered with the outer case 3 on the outer side thereof, and the film unit with lens 1
Becomes The film unit with a lens 1 completed as shown in FIG. 1 is stored in a moisture-proof bag (not shown) that shields light and moisture, and is sold. In order to prevent the film from being unnecessarily consumed by pressing 5 to release the shutter, the main switch knob 6 is set to the “OFF” position, and the shutter button 5 is pressed to perform shutter release. It is stored in a moisture-proof bag.

FIG. 13 is a schematic top view when the switch 17 is OFF. In this state, as shown in FIG. 13, the protruding portion 54a provided on the operation plate 54 presses the arm portion 68 of the switching lever 66, so that the switching lever 66 is rotated counterclockwise. The rotated switching lever 66 is moved to the first position by the protrusion 70.
The engaging member 73 attached to the tip of the protruding piece 76b of the contact piece 76 is pushed to the back side. As a result, as shown in FIG. 7, the first contact piece 76 is deformed to the back side and abuts on the contact portion 78a of the third contact piece 78, so that the driving of the motor 30 is prevented. A user who has purchased the lens-equipped film unit 1 takes out the lens-equipped film unit 1 from the moisture-proof bag and slides the main switch knob 6 to the “ON” position in accordance with the description on the moisture-proof bag or the outer case 3. As a result, the pressure applied to the switching lever 66 from the operation plate 54 is released, and the first contact piece 76 separates from the third contact piece 78 by its elasticity and returns to the original position. Further, as shown in FIG. 6, at this time, the second contact piece 77 is pressed by the pressing piece 144 a formed on the pressing lever 144, so that the first contact piece 76 is pressed.
Since it is deformed to the side of the contact point 76 of the first contact piece 76
a and the second contact piece 77 are brought into contact with each other, the motor 3
0 is rotated.

The rotary shaft 30a of the motor 30 is rotated counterclockwise in FIG. 4, and this rotation is decelerated by the gear group 31 to a predetermined reduction ratio. As shown in FIG. 3, the decelerated rotation of the motor 30 is transmitted to the winding gear 60 by the lower gear 49a of the gear 49, and the winding gear 60 is rotated counterclockwise in FIG. As shown in FIG. 2, the spool 20d of the cartridge 20a meshed with the tooth row 62a of the drive shaft 62 is also rotated counterclockwise by the rotation of the winding gear 60.
The rotation of the spool 20d winds the film 20b into the cartridge 20a. At this time, the driven sprocket 95 shown in FIG. 8 is rotated counterclockwise due to the engagement with the perforation of the film 20b. The rotation of the driven sprocket 95 causes the rotation member 94 attached to the driven sprocket 95 to rotate in the same direction. Due to the rotation of the rotating member 94, the shutter drive lever 90, whose one end 90b is in contact with the shutter charge cam 94b, is rotated clockwise against the bias of the spring 92 and moved to the charge position. When the film 20b is wound up one frame, the rotating member 94 also makes one rotation, and the claw portion 71 of the locking lever 71 is inserted into the groove 94e of the winding stop cam 94a.
b enters and locks the rotation of the driven sprocket 95. Further, the engagement of the groove 94e and the claw portion 71b causes the locking lever 71 to slightly rotate in the clockwise direction, so that the protruding portion 71c and the rising piece 90c are engaged with each other to perform shutter charging. Be seen.

At the same time, when the locking lever 71 is rotated, the engaging portion 69 is pushed by the pin 72 of the locking lever 71 shown in FIG. 3, and the switching lever 66 is rotated counterclockwise. It This switching lever 66
The rotation of the projection 70 presses the engaging member 73 of the first contact piece 76 toward the back side, deforms the first contact piece 76, and as shown in FIG. To contact the contact portion 78a of. As a result, the motor 30 is short-circuited, the rotation of the motor 30 is immediately stopped, and the preparation for photographing is completed. The user looks into the viewfinder eyepiece window 8b (see FIG. 2) formed on the rear cover 19 to check the subject and determine the framing, and then depresses the shutter button 5. When the shutter button 5 is pushed down, as shown in FIG. 9, the pressing pin 5b formed on the lower portion of the shutter button 5 pushes the intermediate lever 143 downward. The intermediate lever 143 is rotated clockwise around the pin 142 formed on the front cover 18, and the engaging portion 14 is rotated.
The claw portion 146c of the lock release lever 146 engaged with 5 is pushed down. Lock release lever 14 in the form of a cantilever
6 has a groove 146a having a U-shaped cross section near its fixed end.
Since the lock release lever 146 is formed in the groove 1
It is pushed down with 46a as a fulcrum. As a result, the vertical portion 71a of the locking lever 71 is pushed by the pressing portion 146b displaced in the vertical direction by a predetermined amount, and the locking lever 71 is slightly rotated counterclockwise.

As shown in FIG. 8, the locking lever 71
However, when it is rotated counterclockwise, the protrusion 71c of the locking lever 71 and the rising piece 90 of the shutter drive lever 90 are rotated.
The engagement with c is released, and the shutter drive lever 90 is rotated counterclockwise by the biasing force of the spring 92. At this time, the kicking-off arm 90d kicks the shutter blades 96, rotates the shutter blades 96, and opens the photographing opening 86. As a result, the subject light that has passed through the taking lens 9 reaches the film 20b, and the film 20b is exposed. Since the motor 30 is immediately stopped by the brake when the film is wound up one frame,
The film 20b is not pulled, and the blurring of the film does not occur during shutter release. At the same time, as shown in FIG. 3, the rotation of the locking lever 71 releases the pressing of the pin 72 against the switching lever 66 in the counterclockwise direction. As a result, the first contact piece 76 returns to its original shape due to its elasticity, and thus moves to the second contact piece 77 side. However, FIG.
As shown in FIG. 2, while the shutter button 5 is pressed down, the pressing piece 144a of the pressing lever 144 and the protruding piece 77a of the second contact piece 77 are not in contact with each other, so
The contact piece 77 is displaced in the direction away from the first contact piece 76 by its own elasticity, the contact portion 76a of the first contact piece 76 and the second contact piece 77 are not contacted, and the motor 30 is not rotated. .

After that, when the depression of the shutter button 5 is released, the second contact piece 77 is again pressed to the first contact piece 76 side by the pressing piece 144a of the pressing lever 144, so that it is shown in FIG. As described above, the contact portion 76 of the first contact piece 76
The a and the second contact piece 77 are brought into contact with each other. As a result, the motor 30 is rotated, and the film is wound by the rotation of the motor 30, and the shutter charge and the film winding are stopped. According to this embodiment, since the groove 146a having a U-shaped cross section is formed in the vicinity of the fixed end of the lock release lever 146, an eccentric load is applied to the lock release lever 146 in the form of a cantilever. Even if the lock release lever 146 is bent, the groove 146a having a U-shaped cross section is easily bent, so that a twisting moment is substantially prevented from being generated in the lock release lever 146, and therefore, the shutter release can be reliably performed. Furthermore, when the lens-equipped film unit is provided with an automatic film feeding mechanism, the locking release lever 146 is displaced in the vertical direction by a preset amount, and therefore the switch of the automatic film feeding mechanism is turned on. -It will be possible to reliably turn off. The present invention is not limited to the above embodiments, and various modifications can be made within the scope of the invention described in the claims, and those modifications are also included in the scope of the present invention. Needless to say.

For example, in the above-described embodiment, the lens-fitted film unit 1 automatically winds the film after photographing, so that the film winding motor 16 is used.
However, the present invention can also be applied to the lens-equipped film unit 1 for manually winding a film. Further, in the above embodiment, the groove 146a having a U-shaped cross section is provided in the vicinity of the fixed end of the lock release lever 146.
However, the shape of the groove is not limited to the U shape, and may be a semicircular shape or a rectangular shape. Furthermore, when an eccentric load is applied to the locking release lever 146 instead of the groove 146a, a torsion moment is generated. A fulcrum structure capable of substantially preventing the occurrence of the above may be provided in the vicinity of the fixed end portion of the lock release lever 146. Further, in the above embodiment, the battery 15
As a dry battery, a plurality of dry batteries are connected in series or in parallel to disassemble a commercially available battery pack, and one of the dry batteries is used for the lens-equipped film unit. You may do it. Further, in the above-mentioned embodiment, in order to prevent erroneous loading of the battery 15,
With the projecting piece 153, the battery 15 can move only in a predetermined direction.
Although it cannot be loaded, as shown in FIG. 14, the battery mark 160 and the plus mark 161 and the minus mark 162 are provided on the bottom surface 19c of the rear cover 19.
Are engraved to clarify the loading direction of the battery 15,
5 may be prevented from being erroneously loaded.

[0030]

According to the present invention, when the shutter button is pressed down, the shutter release can be surely performed, and in the automatic feed type, the switch of the automatic feed mechanism is surely turned on. It is possible to provide a film unit with a lens that can be used for other purposes.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing an appearance of a film unit with a lens according to an embodiment of the present invention.

FIG. 2 is a schematic exploded perspective view of a unit main body of a film unit with a lens.

FIG. 3 is a schematic exploded perspective view of a film winding motor unit and a switch.

FIG. 4 is a schematic exploded perspective view of a motor unit.

FIG. 5 is a schematic side view of a switch when a shutter button is operated.

FIG. 6 is a schematic side view of a switch when driving a motor.

FIG. 7 is a schematic side view of a switch when the motor is stopped.

FIG. 8 is a schematic exploded perspective view of an exposure unit.

FIG. 9 is a schematic perspective view of a shutter mechanism including a shutter button.

FIG. 10 is a schematic perspective view showing the vicinity of the shutter mechanism of the unit main body.

11 is a schematic cross-sectional view taken along the line AA of FIG.

FIG. 12 is a schematic perspective view showing a loaded state of a battery.

FIG. 13 is a schematic top view when a switch is OFF.

FIG. 14 is a schematic perspective view showing another example of a battery loading state.

[Explanation of symbols]

 1 Film unit with lens 2 Unit body 3 Outer case 4 Strobe light emitting part 5 Shutter button 6 Main switch knob 7 Number of shots display plate 8 Finder 9 Shooting lens 10 Strobe charge switch 11 Neon tube 12 Body part 13 Exposure unit 14 Strobe unit 15 Battery 16 Motor Unit 17 Switch 18 Front Cover 19 Rear Cover 20 Film with Patrone 21 Optical Axis 22 Grip 23 Exposure Exposure 24 Patrone Storage Room 25 Film Roll Storage Room 26 Motor Unit Storage Room 30 Motor 31 Gear Group 32 Holding Frame 33 Top Plate 34 Gear support 35 Motor support 36 Connection 37 Motor head 38 Gears 40, 41, 42 Bearing holes 43, 44 Shafts 45, 46, 47, 48, 49 Gear 50 Engaging claws 52, 53 Protrusions 4 Operation plate 55 Convex portion 56, 57 Recessed portion 60 Winding gear 61 Bearing opening 62 Drive shaft 63 Shaft 64 Hole 65 Boss 66 Switching lever 67 Shaft portion 68 Arm portion 69 Engagement portion 70 Projection portion 71 Locking lever 72 Pin 73 Engagement Member 75 Holder 76 First contact piece 77 Second contact piece 78 Third contact piece 85 Base portion 86 Exposure opening 87, 88 Shaft 89 Bearing opening 90 Shutter drive lever 91 Stop ring 92 Spring 93 Screw 94 Rotating member 95 Driven sprocket 96 Shutter Blade 97 Shaft 98 Shutter cover 99 Rear lens 100 100 Front lens 101 Spacer 102 Lens cover 103 Spring 105 Film support surface 140 Opening 141 Projection 142 Pin 143 Intermediate lever 144 Push lever 145 Engagement portion 146 Lock release lever

Claims (3)

[Claims] Claim: What is claimed is: 1. A cantilever structure for releasing the locking of a shutter drive lever by transmitting a force generated by pressing a shutter button to a shutter locking lever for locking a shutter drive lever for opening and closing a shutter blade. In the lens-equipped film unit including a shutter lock release lever, a fulcrum structure that does not substantially generate a torsion moment even when a force is applied to the shutter lock release lever is a fixed end portion of the shutter lock release lever. A film unit with a lens, which is provided in the. 2. A film automatic feeding mechanism configured to turn on a switch when a force generated by pressing down a shutter button is transmitted to the shutter locking lever. The film unit with a lens according to claim 1. 3. The lens-equipped film unit according to claim 1, wherein the fulcrum structure is a groove having a U-shaped cross section.