JPS5940630A - 35mm lens shutter camera capable of automatic focusing - Google Patents

Abstract

PURPOSE:To obtain a compact automatic focusing 35mm. camera, by arranging a lens position controller in specific space in a camera body, and positioning a range finding device along the top wall of a spool storage chamber which is lowered by one stage. CONSTITUTION:The upper wall 3a of the spool storage chamber 3 is lower than the upper wall 2a of a cartridge chamber 2 which is normally irreducible and necessary, and the distance measuring device 27 is arranged along the upper wall 3a. The space 34 surrounded with a dark box 8, the distance measuring device 27 over it, and the left and right cartridge chambers 2 and spool storage chamber 3 is formed in the camera body 1, and the lens position controller 35 is arranged therein. Consequently, neither range finding device 27 nor the position controller 35 projects from the camera body and the camera height is reduced greatly to obtain the compact automatic focusing 35mm. camera.

Description

DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to an autofocusable 35m lens shutter camera, particularly a compact camera.

Conventional technology 7'c with autofocus function currently available on the market
In a 35m lens shutter camera, a lens position control device that automatically advances and automatically stops the focusing adjustment lens in the photographic lens is placed around the part of the photographic lens that protrudes from the camera body (for example, Kaisho 56-527
(Refer to Publication No. 09), the diameter of the lens barrel becomes large, and furthermore, the distance measuring optical system and finder optical system installed above the lens barrel are designed to prevent the optical path from being blocked by the lens barrel. Since it is placed far away from the camera, the overall height of the camera is also high.

Nowadays, cameras are more useful because they are more compact and more portable, and as the demand for more compact cameras increases, in the case of a 35m lens shutter camera with an autofocus function, as mentioned above, The arrangement of the unique lens position control device, etc. is a major factor that prevents compactness, and compactness is slower than that of 35-proof lens shutter cameras that do not have auto 7 and T-scatter functions.

Purpose This invention provides an autofocusable 3511+J camera that has an effective lens position control device tt'i placed in the dead space above the dark box inside the camera body, making the entire camera compact. Features characterized by providing a lens shutter camera In the camera of the present invention, the lens position control device for the focusing adjustment lens includes a dark box and a distance measuring device disposed above the dark box in the camera body, and a distance measuring device on the left and right sides. It is placed in a space surrounded by a film cartridge chamber and a spool storage chamber, and the earthen wall of the spool storage chamber is formed lower than the earthen wall of the film cartridge chamber, and the distance measuring device is placed almost along the earthen wall of the spool storage chamber. It is positioned so that it rests on a flat surface. The lens position control device is rotatably supported by an axis perpendicular to the optical axis direction of the photographing lens, and engages a focusing adjustment lens with the outer circumferential cam surface from the optical axis direction of the photographing lens, thereby controlling the light of the focusing lens. The lens position control cam plate includes a lens position control cam plate that controls the axial position, and a locking member that controls the rotational position of the lens position control cam plate based on a distance measurement signal from a distance measurement device.

To explain the embodiment shown in the drawings, in Figs. 1 to 3, 1 is a camera body made of synthetic resin, and includes a film cartridge chamber 2, a spool storage chamber 3, and a battery storage. A chamber 4 and an exposure aperture window 5 are formed. A top cover 6 and a bottom cover 7 are fixed to the top and bottom of the camera body 1. A dark box 8 is fixedly installed between the film cartridge chamber 2 and the spool storage chamber 3 of the camera body 1. The front and rear surfaces of the dark box 8 are open, and the rear lenses 9b+9c of the photographic lens 9, which are composed of a front lens 9a and a rear lens 9b+9o, are housed on the front side.

A shutter blade 10 is provided between the front lens 9a and the rear lens 9b+9o, and an electric shutter device 11 that controls opening and closing of the shutter blade 10 is connected to a dark box 8 in the camera body 1.
It is provided on the back side of the shutter base plate 12 located on the front side of the shutter base plate 12 . A circuit board 13 for an automatic exposure control circuit included in the electric shutter device 11 is located at the back inside the electric shutter device 11 . The front lens 9a is fixedly held by a lens barrel portion 14 protruding forward of the camera body 1, and the rear lens 9b on the front side is held by a holding frame 1 fixed to the shutter base plate 12.
It is held fixedly by 5. On the other hand, the rear lens 90 on the rear side is held by a holding frame 16 located inside the dark box 8, and the second lens of the holding frame 16 extends outside the dark box 8 through a slit 17 in the optical axis direction of the top wall 8a of the dark box. A guide rod 20 protruding from the back surface of the shutter base plate 12 in parallel with the optical axis is fitted into a cylindrical portion 19 at the tip of the arm 18 of the shutter plate 1, so that the shutter can move in the optical axis direction. ing.

In this embodiment, the photographing lens 9 has a rear lens Qci.
A focusing adjustment lens is used, and focusing is performed by moving the lens in the optical axis direction. The holding frame 16 is provided at a bifurcated distal end portion 22 of a second arm 21 provided at a location different from the first arm 18, and protrudes from the back surface of the shutter base plate 12 parallel to the optical axis. The engagement of one guide rod 23 also guides the optical axis direction, and prevents the holding frame 16 from rotating around the guide rod 20 (see FIG. 4).

A finder window 24 and two distance measuring windows 25° and 26 located on both sides thereof at a predetermined baseline length necessary for distance measuring are provided above the protrusion of the lens barrel portion 14 on the front surface of the camera body l. . A distance measuring device 27 is provided above the dark box 8 in the camera body 1. The distance measuring device 27 performs distance measurement using the distance measuring windows 25, 26' (5). The base body 30 is provided with distance measuring optical systems 28 and 29 located behind each of the distance measuring elements 26 and 26, a distance measuring element (not shown), and an electric circuit that processes the output obtained from the element and outputs a distance measuring signal. The base body 30 also holds a finder optical system 31 located behind the finder window 24, and has a distance measuring device 27 on the rear end surface.
A circuit board 32 on which the entire electric circuit (not shown) is formed is fixedly installed.

The spool storage chamber 3 utilizes the fact that the axial dimension of the film winding spool 33 accommodated therein is sufficient to be slightly larger than the film width, so that the earthen wall 3a is the same as the normal minimum required size. Upper wall 2 of patrone room 2 sized
The distance measuring device 27 is positioned so as to be on a plane substantially along this low upper wall 3a. The dark box 8 is formed such that its upper wall 8& is lower than the upper wall 3a of the spool storage chamber 3. As a result, the camera body 1 has a space surrounded by the dark box 8, the distance measuring device 27 above it, the left and right film cartridge chambers 2, and the spool storage chamber 3, while significantly lowering the height of the camera. 34 is formed, and a lens position control device 35 is arranged in this space 34.

The lens position control device 35 has a horizontal plywood 36 fixed to the upper end of the shutter base plate 12 facing backward, and the plywood 36
is equipped as one block. The lens position control device 35 has a vertical axis 37 perpendicular to the optical axis relative to the base plate 36.
Optical axis direction shutter base plate 1
The outer cam surface 39a contacts the driven pin 38b of the interlocking member 38 in order to move the focusing lens 9c forward in the optical axis direction via the interlocking member 38, and A lens position control cam plate 39 supported on the υ base plate 36 by a right-angled vertical shaft 69, and a spring 40 for rotationally driving the lens position control cam plate 39. Furthermore, it has a locking member 41 that locks the lens position control cam plate 39, an electromagnet 42 that operates this locking member 41, etc. (FIGS. 4 to 6), and the electromagnet 42 is suitable for the focusing adjustment lens 9C. When the focus adjustment lens 90 is extended to the position, the locking member 41 is actuated by a distance measurement signal from the distance measurement device 27 to stop the focus adjustment lens 90 from being extended.

The distance measuring device 270 circuit board 32 has its lower end part 32a facing inside the lens position control device 35 as shown in FIG. facilitates electrical connections. Since the entire lens position control device 35 is attached to the shutter base plate 12 by its horizontal base plate 36,
The required relative position adjustment between the photographing lens 9 and the lens position control device 35 becomes easy. The position of the focusing lens 90 is controlled by the lens position control cam plate 39.
It is also possible to directly engage the focusing adjustment lens 9C from the optical axis direction with respect to the outer circumferential cam surface 39a of the lens 9.

An upper film winding mechanism 43 and a lower film winding mechanism 44 are respectively disposed at the top and bottom outside of the spool storage chamber 3 of the camera body 1, and both are connected to a film winding shaft 45. The upper film winding mechanism 43 has an externally operable film winding knob 46, and the lower film winding mechanism 4
4 is connected to a rotating shaft 47 which also serves as a rewind button via a clutch (not shown). The rotating shaft 47 is movable in the axial direction and fixed to a rotating member 49 that is integrated with the film feed sub-nut 48 by vertical keys and key grooves (not shown) so as to rotate together in the rotational direction. The bottom cover 7 is always urged to protrude outside the bottom cover 7, and is connected to the lower film winding mechanism 44 by the clutch only in this protruding state. The film winding shaft 45 passes vertically through the spool storage chamber 3 and the spool 33 housed therein, and is connected to upper and lower film winding mechanisms, ia, 44, and is frictionally applied to the spool 33 by a spring (not shown). combined. A coupler 45& is integrally formed at the lower end of the film winding shaft 45 and engages with a drive shaft of the winder (not shown) when the winder is attached to the bottom cover 7.

Accordingly, when the film winding fJI 145 is rotated by manual film winding operation using the film winding knob 46 or automatic film winding operation from the winder,
The rotating shaft 47, rotating member 49, and sprocket 48 are rotated in conjunction with each other, and the film fed by the sprocket 48 is wound onto the spool 33 on the winding shaft 45. A rotating shaft 47f that also serves as a rewind button.

When pushed against the spring 50, the rotation shaft 47 and the lower film winding mechanism 44 are disconnected by a clutch (not shown), and the rotation shaft 47, the rotation member 49, and the sprocket 48 are freely rotatable, and the film cartridge chamber is opened. It is possible to rewind the film using a film rewind knob 51 provided on the second side.

As is well known, a one-way clutch (not shown) is provided between the film winding knob 46 and the upper film winding mechanism 43, and a film counter mechanism 52 is disposed above the upper film winding mechanism 43. . The upper cover 6 is provided with a transparent cover 53 located on a film counter plate (not shown) included in the film counter mechanism 52.

On the periphery of the front lens 9a of the photographic lens 9 of the camera body l, there is a light receiving device 54 for automatic exposure control and its light receiving window 55, and a light receiving window 55 for adjusting the amount of light incident on the light receiving device 54 to film sensitivity. The light receiving aperture υ aperture 56 is restricted accordingly.
A film sensitivity setting mechanism 58 having a film sensitivity setting plate 56 and a film sensitivity setting knob 57 for external operation thereof is provided. A part of the film sensitivity setting knob 57 faces outside the camera body 1, and is a gear that meshes with a sector gear 56b on the outer periphery of the film sensitivity setting plate 56 inside the camera body 1.

A transparent window 59 is provided on the front side of the camera body 1 and is located in front of a film sensitivity setting dial plate included in a film sensitivity setting mechanism 58. The shutter base plate 12 also holds the light receiving device 54 as well as the electric shutter device 11. , forming one shutter block (FIGS. 4 to 6).

The film rewinding shaft 60 of the film rewinding knob 51 faces the upper part of the inside of the film cartridge chamber 2 and is connectable to the film winding shaft of the film cartridge. Return mechanism 6
1 in a slidable manner. A back cover 62 is provided on the rear surface of the camera body 1 so as to be openable and closable, and a film pressure bonding plate 64 is attached to the inner surface of the back cover 62 via an elastic member 63. 65 is a lid of the shirt release button N66U battery storage chamber 4, and 67 is an eyepiece of the finder optical system 31. The holding frame 68 of the eyepiece lens 67 is attached to the camera body 1, but the holding frame 68 is attached to the distance measuring device 2 instead.
7 circuit board 32.

The above is the configuration arrangement of each part of the camera in this embodiment.
), and the above-mentioned 9 camera body l
Because it is arranged in a space 34 surrounded by the dark box 8, the distance measuring device 27 above it, the left and right film cartridge chambers 2, and the spool storage chamber 3, the diameter of the lens barrel portion 14 becomes large. First of all, the camera is more compact in this respect. Further, as a result of this, it is possible to arrange the distance measuring device 27 close to the photographing lens 9, but furthermore, the distance measuring device 27 can be placed in a normal film cartridge chamber with the minimum necessary size. Lower than the 2m earthen wall of 2, spool accommodation ¥3 JJ3
The lens position control device 35 is provided at a position on a plane substantially along the direction a, and the lens position control device 35 is connected to the distance measuring device 27 arranged as described above and the lowered spool storage chamber upper wall 3a.

Since the camera is located in a space 34 surrounded by the film chamber 2 and the spool storage chamber 3, the height of the camera is also significantly reduced.

Note that the camera body l has a portion 1 at the rear thereof to provide a tunnel step between the film pressure bonding plate 64 and the film pressure bonding plate 64.
a, 7. It is necessary to have a part IC that completely forms a light-tight structure together with the contact surface 1b1 for the ilm pressure bonding plate 64 and the back 62, and the finder optical system 31 must be provided further above these parts. Below the finder optical system 31 and above the effective photographing light flux from the photographing lens 9 to the exposure aperture 5, a space of a certain width is inevitably created.

In the configuration as described in the above description, the dark box 8 is formed small enough to not block the effective photographing light flux, and the space above the effective photographic light flux is partitioned from the inside of the dark box 8, thereby making it possible to reduce the spool storage chamber 3. This means that the lens position control device 35 is placed in the space 34 above the top wall 8a of the dark box 8, which is also lower than the top wall 3a.

Furthermore, as a result, a setting space 34 for the lens position control device 35 is created between the distance measuring device 27 and the dark box 8, which are arranged lower than in the conventional case, and the height of the camera is significantly lowered. There is.

In the case of conventional 35mm lens shutter cameras with autofocus function, the rangefinder is located far away from the photographic lens, and the finder optical system is also located at the same height as the rangefinder optical system. The height of the camera is considerably higher due to the above configuration and arrangement, and the above configuration,
Space 3 in which the lens position control device 35 is arranged
The space corresponding to No. 4 extends further upwards, but most of that space is a dead space, with only the circuit board and a guide rod for guiding the focusing adjustment lens of the photographic lens installed there. It has become

On the other hand, the above configuration and arrangement make maximum use of the space, making the height of the camera significantly lower than in the past, and also arranging the lens position control device 35 in the space. Instead, there is no unreasonable need to move other camera mechanisms that should originally be placed in that space to other locations, and the camera is certainly made more compact.

In particular, the lens position control device disposed in the space 34 performs focusing adjustment from the direction of the optical axis of the photographing lens on the outer circumferential cam surface 39a of the lens position control cam plate 39, which is pivotally supported on a shaft 69 perpendicular to the optical axis of the photographing lens. The focusing adjustment lens 9 is brought into engagement with the lens 9C, and the rotational position of the cam plate 39 is controlled based on the distance measurement signal.
Since the extended position of the zero is controlled, the entire structure is flat, making it even more advantageous to place it in the space 34 within the camera body 1 in order to make the camera more compact. Moreover, since the lens position control cam plate 39 and the focusing lens 9C can be reliably engaged, a highly accurate lens position control function can be stably performed.

To further explain the specific configuration, the lens position control device 35 has a lens position control cam plate 39.
5, in the charged state shown in FIGS. 4 to 6, the spring 40 is plowed between the fixing pin 70 on the base plate 36 and the cam plate 39 around the shaft 69. It is biased to rotate clockwise. On the outer periphery of the cam plate 39, in addition to the cam surface 39a for controlling the lens position, when the locking member 41 is actuated during clockwise rotation by the spring 40, it engages with the tip retaining portion 41a and stops. When the locking pawl 39b1 is not operated during clockwise rotation, the locking claw 39b1 engages with the engaging portion 41a of the locking member 41 in the inactive state to regulate the final clockwise rotation position. A locking step portion 39c is formed. A partially toothed gear 71 is provided below the lens position control cam plate 39 and is pivotally supported by sharing the same shaft 69 so as to be able to independently rotate with respect to the cam plate 39. The interlocking pin 394 of the spring 40
The gear 71 is brought into contact with the biasing force of the gear 71, and is connected to the partially toothed gear 71 so as to be interlocked with the gear 71.

The partially toothed gear 71 is pivotally supported by the plywood 36, sharing the same shaft 73 with the first sector gear 72 meshing with it, and the gear 72 so that they can rotate independently. The interlocking pin 7 is moved by the activated spring 74.
5a is engaged with the outer circumferential bent piece 72a of the gear 72.
A sector gear 75, a small diameter intermediate gear 76 that meshes with the second sector gear 75, and a large diameter intermediate gear 77 that is integrated with the gear 76.
, a lens position control cam plate 39 which is connected to an escape wheel 79 integral with the gear 78 through a gear 78 that meshes with the gear 77, and is biased by a spring 40 by the escape wheel 79 and an ankle 8o that engages with the escape wheel 79; The interlocking rotational speed of the spring 4o of the cam plate 39 is controlled to a predetermined speed.
rotation at the predetermined speed.

The pivoting of the interlocking member 38 to the plywood 36 by the shaft 37 is as follows:
An upper end 82a is provided on the lower surface of the base plate 36 via an adjustment base plate 82 which is pivotally supported by a vertical shaft 81, and is pivotally supported at a lower end 82b of the adjustment base plate 82. The adjustment base plate 82 has its upper end 82
The split groove 82° formed in a is located in the V-shaped notch 36a formed in the front edge of the base plate 36, and a driver is inserted into the split groove 82o to change the axis 37 around the axis 81. By this displacement, the axial support of the interlocking member 38 can be changed, and the position of the focusing lens 9c in the optical axis direction corresponding to the rotational position of the lens position control cam plate 39 can be finely adjusted.

The locking member 41 has an adsorption piece 83 on the tail end 41b that is attracted by the electromagnet 42, and is pivotally supported on the base plate 36 by a shaft 84, and the base plate 36 and the locking member 41 The locking member 41 is normally biased counterclockwise by a spring 85 applied between the locking member 41 and the locking member 41, and is supported under the locking member 41 by sharing a shaft 84 so as to be able to rotate independently with the locking member 41. A biasing lever 86 is provided and shown in FIGS.
In the charging state shown in the figure, the biasing lever 86 is attached to the actuating pin 3 protruding from the lower surface of the lens position control cam plate 39.
9e pushes the driven portion 86 & at one end in the direction H in FIG. By exerting a clockwise urging force that overcomes the spring 85, the locking member 41 maintains the state in which the adsorption piece 83 is pressed against the electromagnet 42. The electromagnet 42 is fixed to one end of the plywood 36.

A sliding contact piece 125 is provided on the upper surface of the lens position control cam plate 39.
The insulating base 125& is fixed 126, and the sliding contact piece 125
A printed circuit board 127 having a plurality of contact points that come into contact with the sliding contact piece 125 corresponding to each fllj position of the focusing adjustment lens 9C is provided on the lower surface of the base plate 36 facing the. As a result, as the focusing adjustment lens 9C moves out as the lens position control cam plate 39 rotates, the sliding contact piece 125 sequentially contacts a plurality of contact points, thereby causing the focusing adjustment lens 9C to move forward. An electrical signal regarding the moving position is given to the distance measuring device 27. The distance measuring device 27 compares the electrical signal related to the moving position of the lens 90 and the electrical signal related to the subject distance, and when they match, issues a focusing signal.

Based on the signal from the distance measuring device 27, the electromagnet 42
When the focus adjustment raise 9C reaches the proper extension position,
The magnetized state is changed to the demagnetized state, and the adhesion to the g&clamp 83 that was crimped in the charged state is released, and the focusing adjustment lens starts to move clockwise from the charging position of the lens position control cam plate 39 in FIG. The locking member 41, which has already been released from the clockwise bias by the spring 87, is actuated by the counterclockwise bias by the spring 85, and the engaging portion 41& is activated by the locking claw 391 of the lens position control cam plate 39. ) to stop the focusing adjustment lens 9c from moving out.

The shaft 84'i is attached to the side of the lens position control cam plate 39.
Distance-linked lever 8 that is shared and pivoted so that it can rotate independently
8 is provided. The distance interlocking lever 88 engages with the operating pin 39e on the lens position control cam plate 39, and has a cam surface 88& for obtaining a swinging lid according to the engagement position, and is not activated during normal photography other than flash photography. pin 39
When escaping from the rotational trajectory of e and switching to flash photography,
Distance signal lever 89 engaged in conjunction with the switching operation
, the actuating pin 39s is biased to a position facing within the rotational trajectory of the actuating pin 39s.

A charge lever 90 is υ supported by a shaft 91 at the end of the plywood 36 opposite to the electromagnet 42 fixed portion. The charge lever 90 has an operating end 90a connected to one end of the charge connecting rod 92 by a pin 93, and the other end of the connecting rod 92 is pivotally supported by the shaft 73, and is connected to the shaft 73 via the shaft 73. It is connected by a pin 95 to a tip 94a of a connecting lever 94 that is integrally connected to the second sector gear 75, so that the charge lever 90 and the second sector gear 75 are connected to each other. Charge lever 9oti, base plate 36
The driven end 90b faces into the upper film winding mechanism 43 shown in FIG. 2, and in the charged state shown in FIGS. 4 to 6. , the lens position control device 35 is rotated clockwise along with the second sector gear 75 against the spring 96 in conjunction with the operation of the film winding 1101 to bring the lens position control device 35 into the charged state as shown in the figure.

In this charging state, the locking lever 98, which is pivotally supported by a horizontal shaft 97 parallel to the optical axis, is attached to the front edge bent piece 36b of the charge lever shaft support side end of the plywood 36.
is held in place by locking it in the charging position. The locking lever 98 is biased counterclockwise in FIG. 6 by a spring 99 acting around a shaft 97 between the base plate 36 and the driven pin 9 protruding opposite to the tip locking piece 98m.
8b, together with the shirt release plate 100, are placed within the pushing trajectory of the shirt release button 65, and can be interlocked with the shirt release button 65. Shirt tallerize button 65
When the locking lever 98 is not pushed down, the locking lever 98 is in the locking position shown in FIGS. 4 to 6, and the locking piece 98a engages with the operating end 90a of the charge lever 90 that has reached the charging position, so that the charging is performed. When the lever 90 is locked in the charge position and the shirt release button 65 is pressed, the charge lever 9
0 is pushed down by the passive pin 98bi shutter release button 65 and rotated clockwise against the spring 99, disengaging the locking piece 98a from the charge lever operating end 90a, and moving the charge lever 90 to the charge position. I am trying to release the lock.

The locking piece 98a of the locking lever 98 is located within the operating locus of the charge lever t<-operating end 90a.
When the lever a is moved to the charging position, the locking piece 98& is held at an inclination to overcome the spring 99 while pushing it down, and the charge lever operating end 9
With the return by spring 99 immediately after 0a overcomes,
The operating end 90 of the charge lever 90 reaches the charge position
engage with a.

The film sensitivity setting plate 56 in the film sensitivity setting mechanism 58 has, on its outer periphery, the light receiving aperture aperture 5'6a and the sector gear 56b, as well as the aperture aperture set in accordance with the subject distance during flash photography. It has a film sensitivity setting cam 56o that provides film sensitivity information to the so-called flashmatic mechanism 101 as shown, and the rotation position is appropriately set according to the film sensitivity of the film used by operating the film sensitivity setting knob 57 ( Figures 3 and 4).

The upper film winding mechanism 43, which the passive end 90b of the charge lever 90 faces, is partially rotated counterclockwise in conjunction with the film winding operation, as shown in FIG. It has a plate 102. Charge plate 10
A planting pin 102& is provided on 2, and this planting pin 10
The passive end 90b of the charge lever 90 is located within the rotational trajectory of the charge lever 2a.
is coming. As a result, when the charge plate 102 is rotated counterclockwise in conjunction with film winding,
The charge lever 90 has its passive end 90b connected to the charge plate 1.
02 and rotates clockwise to the charging position shown in FIGS. 4 to 6 to charge the lens position control 35.

The charge plate 102 has an engaging recess 102b in a part of its outer periphery.
is formed, and when the film winding is completed, the winding stopper claw 104, which is separately supported υ by a shaft 103, engages with the four engaging parts 102b by the counterclockwise bias of the spring 105 acting on it. It is locked and wound. The winding pawl 104 has a pin 10 at one end of the winding connecting rod 106.
7, and the winding connecting rod 106 has a charge interlocking plate 108 whose other end slide hole 106a engages a bent piece 92a on the edge of the charge connecting rod 92 and a passive end 108a, which is linked to the charging operation. The support shaft 109 is engaged and guided, and the bending piece 106b on the other end side is moved to the left side in FIG. It engages with the passive arm 111a of the release lock auxiliary lever 111 from the side opposite to the operating end 108b of the charge interlocking plate 10B.

The shirt release lock auxiliary lever 111 engages and disengages a shirt release lock lever 112, which is similarly provided in the vicinity of the shirt release plate 100, with four retaining parts 100a formed on the shirt release plate 100-9. The operation opposite to the rear of the locking piece 112 &@1llb'6
The charge interlocking plate 108 is connected to the spring 1.
Figure 5, due to a spring (not shown) that is even stronger than 10.
In the charging state shown in FIG. 5, the charge interlocking plate 108 is biased counterclockwise as shown in FIG.
is rotated counterclockwise with the leftward movement of the operating end 10.
8b, connect the passive arm 1118L of the shirt release lock auxiliary lever 111 to the bent piece 106b of the connecting rod 106.
At the same time, by being pushed to the right against the spring 110, the winding connecting rod 106 holds the winding stopping pawl 105 in the engagement recess 102b of the charging plate 102, and the film is wound again. The shirt tally release lock auxiliary lever 111 has its actuating arm 111b engaged with the locking piece 112a of the shirt tally release lock lever 112.
Release the pushing motion against the shirt release lock lever 1.
12 is biased clockwise by a spring (not shown) acting on it, the locking piece 112a'i is removed from the engagement recess 100a of the shirt release plate 100, and the shirt release plate 100 is pushed down. Enables tallerize operation (Figure 7).

The above is the configuration of the lens position control device 35 and the main mechanisms involved therein, and its operation will be explained below. In the charging state shown in FIGS. 4 to 7, when the shirt release button 65 is pressed down, the shirt release plate 100 is also pressed down at the same time, and the distance measuring device 27 is powered on by turning on the main switch (not shown). Then, the electromagnet 42 turns on and attracts the attraction piece 83 crimped thereto, and the distance measuring device 27 outputs an electric signal related to the distance to the subject to which the camera is directed. On the other hand, the locking lever 98 is rotated clockwise in FIG. 6 via its driven pin 98b, thereby releasing the lock of the charge lever 90. By releasing the lock from the charge lever 90, the charge lever 90 is biased by the spring 96, and the charge link I492, the charge link lever 94, and the second sector gear 75 integrated therewith are moved.
When the second sector gear 75 rotates counterclockwise, the first sector gear 72 follows through the spring 74 and rotates the partially toothed gear 71 clockwise. . The lens position control cam plate 39 follows the clockwise rotation of the partially toothed gear 71 by the urging of the spring 40, and the escape wheel is connected to the second sector gear 75 through intermediate gears 76, 77, and gears 78. 79 and the pallet wheel 80 that engages therewith, it is rotated clockwise while being controlled at a predetermined speed.

By this clockwise rotation of the lens position control cam plate 39,
Focusing F via the outer peripheral cam surface 39a and the interlocking member 38
The one-node lens 90 is ejected. At that time, the distance measuring device 27
Electric signals corresponding to each extended position of the focusing adjustment lens 90 are sequentially obtained by contact between the movable contact piece 125 and a plurality of contact points, and the left electric signals corresponding to the photographing distance are compared; When both signals match, distance measuring device 2
A focusing signal is emitted from 7 to demagnetize the electromagnet 42.

As a result, the suction piece 83 is released from the electromagnet 42. At this time, the locking member 41 has already been released from being pushed by the operating pin 39θ due to the clockwise rotation of the lens position control cam plate 39 by the biasing lever 86.
The spring 87 acting between the biasing lever 86 and the biasing lever 86 is deenergized, and the biasing force of the spring 85 causes the fifth F.
A is rotated in the counterclockwise direction, and the tip retaining portion 41a engages with one of the locking claws 39b on the outer periphery of the lens position control cam plate 39, thereby locking the lens position control cam plate 39 at the current rotational position. Then, the focusing adjustment lens 9o is stopped at an appropriate extended position.

Even when the lens position control cam plate 39 is locked in the intermediate rotation position, the partially toothed gear 71 is rotated to the final rotation position.

When the photographing distance is infinite, the electromagnet 42 is not demagnetized during the rotation of the lens position control cam plate 39, and the outer peripheral stepped portion 39a of the cam plate 39 is engaged with the tip retaining portion 411L of the locking member 41. The focus adjustment lens 9c is rotated to the final rotation position where it touches the lens, and the focusing adjustment lens 9c is extended to the infinity photographing position.

As described above, the position of the focusing lens 9° is controlled during photographing.

After the shirt release plate 100 is pressed down and a predetermined time period, which is longer than the time required for the lens extension control described above, has elapsed, the electric shutter device is activated and a photograph is taken.

When the charge connecting rod 92 moves to the right in conjunction with the counterclockwise rotation of the charge lever 9 degrees due to the shirt release operation, the charge interlocking plate 108, whose passive end 108a is engaged with the bent piece 92&, is plowed by it. The operating end 108b is rotated clockwise in FIG.
The passive arm 111a of the shirt release lock auxiliary lever 111 and the bent piece 106b of the winding connecting rod 106
7 is released, the winding connecting rod 106 is biased by the spring 110, and the bent piece 106
BLC tries to move the auxiliary lever 111 to the left while rotating it counterclockwise, but the auxiliary lever 111 is moved by its actuating arm 111b to the shirt tallery large mouth lever 1.
When trying to push the 12 locking pieces 112& to the left in FIG.
In the depressed state of 00, the winding pawl 104 is hardly moved to the left, and the winding pawl 104 remains engaged with the engaging recess 102b of the charge plate 102.

After shooting, by releasing the shirt release button 65,
When the shirt taller release plate 100 is returned to its original position by the bias of a spring (not shown), the locking piece 112a is engaged with the side edge engaging recess 100a of the shirt taller release plate 100, and the shirt taller release operation is performed again. This operation is prevented, and the winding connecting rod 106 is allowed to move to the left by the spring 110, so that the winding connecting rod 106 causes the winding connecting rod 106 to rotate the winding pawl 104 clockwise against its spring 105. Accordingly, the winding stopper claw 104 is
It is removed from the engaging recess 102b of the charging plate 102, releasing the film from being wound, and making it possible to wind the next film.

When the film winding operation is performed again in this state, the charging state shown in FIGS. 4 to 7 is established, and the above-mentioned photographing can be repeated.

As shown in FIG. 8, the flashmatic mechanism 101 has a film sensitivity signal lever 114 supported by a shaft 113 on the shutter base plate 12, and the distance signal Lever 89 is pin 11
It is pivoted by 5. Film sensitivity signal lever 1
14 has its lower end bent piece 114a facing the film sensitivity setting cam 56o of the film sensitivity setting plate 56 (FIG. 4), and the shaft 113 is placed between the distance signal lever 89 and the pin 115. The distance signal lever 89 is biased counterclockwise in FIG. 8 on the film sensitivity signal lever 114 by the spring 116 working around it, and its side arm 89a comes into contact with the fixed pin 117 on the shutter base plate 12. Stabilize the film sensitivity signal lever 114 in position.
On the other hand, under the force clockwise in FIG. 8, the side passive portion 114b comes into contact with the bent piece 119a at the lower end of the flashmatic switching lever 119, which is separately supported by the shaft 118 on the shutter base plate 12. The distance signal lever 89 is stabilized by contacting the diaphragm 9 installed at its lower end.
The control cam surface 89b is separately attached to the shaft 120 on the shutter plywood 12.
The diaphragm opening/closing lever 12 is rotated in accordance with the relative positions of the distance signal lever 89 and the film sensitivity signal lever 114.
By regulating the drawing opening process amount in step 1, the drawing opening amount per day is controlled.

The flashmatic switching lever 119 has a spring 1
22 in the clockwise direction in FIG. 8, and the upper end 119b faces the photographing mode switching member 123. During normal shooting, the flashmatic switching lever 119 is moved by the film sensitivity signal lever 1 by the bending piece 119a because the shooting mode switching member 123 is separated from the upper end 119b.
14 against its spring 116 and stabilized at the rotational position shown in FIG. It is far away from the end 88b and does not push the distance interlocking lever 88 into the rotation locus of the operating pin 39e of the lens position control cam plate 39, and the distance interlocking lever is pushed by the operating pin 39e via the cam surface 88a. It does not receive any movement from 88.

During flash photography, the photography mode switching member 123 is set to the eighth position.
In the figure, the flashmatic switching lever 1 is moved to the left.
Since the upper end 119b of the film sensitivity signal lever 114 is pushed against the spring 122, the lever 119 is rotated counterclockwise, the bending piece 119& moves to the right, and the film sensitivity signal lever 114 is bent by the biasing force of the spring 116. It is rotated clockwise following the curved piece 119a. Due to the displacement of the shaft 115 with respect to the bin 117 at this time, the distance signal lever 89 has a large margin between its arm 89& and the bin 117, and is rotated counterclockwise by the bias of the spring 116, and the upper end 89o pushes the distance interlocking lever free end 88b to the left so that the cam surface 88a of the distance interlocking lever 88 is positioned within the rotation locus of the operating bin 39e of the lens position control cam plate 39.

This causes the distance interlocking lever 88 to move toward its cam surface 88.
a and the lens position control cam plate 3 via the operating bin 39θ.
It is swung in conjunction with the rotation of the lever 9, and the movement is conversely transmitted to the distance signal lever 89 as distance information. Therefore, the diaphragm 9 control cam surface 89b receives information about the set film sensitivity and shooting distance, and controls the diaphragm aperture during flash photography in accordance with the set film sensitivity and shooting distance.

A shutter speed changeover switch 124 provided in an automatic exposure control circuit (not shown) is arranged below the flashmatic changeover lever 119.

The switch 124 has one contact piece 1241L facing the other bent piece 19o at the lower end of the flashmatic switching lever 119, and in the normal photographing state shown in FIG.
190 through the insulating tube 119d fitted thereto, and is in an off state away from the other contact piece 124b, so that a shutter speed corresponding to the subject brightness and the set aperture value can be obtained. However, when switching to flash photography, the bending piece 119C is moved to the right by the counterclockwise rotation of the flashmatic switching lever 119 at the time of switching, and the leftward pushing on the contact piece 124a is released. , the contact piece 124& returns to the pressure contact state with the contact piece 124b, the switch 1-24 is turned on, and the shutter speed is set to a predetermined speed for flash photography.

Furthermore, the holding frame 16 of the focusing adjustment lens 9C located at the rearmost position of the photographic lens 9 is a molded product of synthetic resin or the like, and during molding, an ejector turbine is required in the movable mold. As shown in FIG. 9 as a cutout mark 128 of the ejector turbine, the arrangement M of the bottle is placed on the side facing the exposure aperture window 5 of the camera body 1 and on the diagonal angle m1-1 +Lz of the window 5. In order to form the eject turbine f, a gouge 129 necessary for the circumference of the part where the eject turbine is installed is formed on the light shielding wall 16.
&Yoshi is also formed with an acute-angled inclined peripheral wall 129a.

These considerations were taken to ensure that the photographic lens barrel did not protrude excessively from the camera body 1 in order to achieve even more compactness than ever before, even though this is a 35-song camera.
It is effective to move the photographic lens 9 as close to the exposure aperture window 5 as possible and to mold the lens barrel as small as possible. In the case of the close focusing lens 90, as shown in FIG. 10, the emitted light ray P along the diagonal of the exposure aperture window 5 has an extremely acute angle, so the harmful light mP2 has an even more acute angle. Light shielding line of lens holding frame 16 1iN
There is a risk that the reflected light from the xsa will cause p-flare or bostra to the exposure aperture window 5, and such things are usually prevented by blocking harmful light with a light-shielding frame 130 provided as shown in FIG. However, as a result of the miniaturization of cameras as described above, although the light shielding effect is effective on the long and short sides, it is not effective on the diagonal positions.

As a result of such considerations, as shown in FIG.
Since the light shielding wall 16a also has an extremely acute slope, the harmful light P2 is reflected at an extremely acute angle, so that the harmful light P2 does not reach the exposure aperture window 5, and flare or ghost caused by this is reliably prevented. Ru.

Although one embodiment has been described above, in the camera camera of the present invention, there is no particular restriction on the focusing method of the photographic lens. That is, in the case of the embodiment described above, focusing is performed by moving out the rearmost lens 9C of the rear lenses 9b+9o, but other focusing methods may be used.
For example, if explained with reference to the drawings of the above embodiment, the front lens 9a
You may also perform shift focusing. Even in that case,
The moving member integrated with the holding frame of the front lens 9a is moved to the shaft base plate 1.
2'ii and may be connected to the lens position control device 35. In any case, the lens position control device 35 arranged in a space 34 surrounded by the dark box 8, the distance measuring device 27 above it, the left and right film cartridge chambers 2, and the spool storage chamber 3, and the focusing of the photographic lens 9 are controlled. This association can be accomplished easily and without taking up much space. Furthermore, the cam surface of the cam plate 39 can be formed in a step-like manner to perform so-called zone focusing, or a cam hole or a cam groove can be formed in the cam plate 39 instead of the cam surface on the peripheral edge. A configuration may be adopted in which the pin 38b is fitted into it.

Effects According to the present invention, the lens position control device for achieving the autofocus function is placed not around the photographing lens part that protrudes from the camera body, but in the dark box inside the camera body, which has conventionally been a dead space. The spool is placed in a space surrounded by the upper ranging device, the left and right film cartridge chambers, and the spool storage chamber, and the earthen wall of the spool storage chamber is lower than the earthen wall of the film cartridge room. By locating the distance measuring device on a plane along the earthen wall of the storage chamber, it is possible to provide a compact 35wL lens shutter camera with an autofocus function.

In particular, the lens position control device engages a focusing adjustment lens from the direction of the optical axis of the photographic lens to the outer circumferential cam of a lens position control cam plate that is pivotally supported on an axis perpendicular to the optical axis of the photographic lens. By controlling the rotational position of the lens position control cam plate based on the rotational position of the lens position control cam plate, the entire extension position of the focusing adjustment lens can be completely controlled. This makes it even more advantageous to place it in the space above the dark box inside. In addition, the lens position control cam plate and the focusing lens can be reliably engaged, and a highly accurate lens position control function can be stably performed.

[Brief explanation of drawings]

Fig. 1 is a front view of a camera showing an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view of the same camera near the center in the front and back direction, and Fig. 3 is a slight cross-sectional view taken along the line ■-■ in Fig. 1. An enlarged sectional view, FIG. 4 is a partial exploded perspective view, FIG. 5 is a plan view of the lens position control device, FIG. 6 is a front view of the device, and FIG. 7 is an upper film winding view. A partial perspective view of the mechanism, FIG. 8 is a front view of the flashmatic mechanism, FIG. 9 is a rear view of the focusing lens, and FIGS. 10 and 11 are diagrams explaining the effects of harmful rays and how to avoid them. . 1...Camera body, 2...Film cartridge chamber,
2a... Earthen wall, 3... Spool storage chamber, 3a...
Upper wall, 5... Exposure aperture window, 8... Dark box, 8a...
Upper wall, 27... Distance measuring device, 34... Space, applicant
Minolta Camera Co., Ltd. 175 Figure 9 Town O Figure 11

Claims (1)

[Scope of Claims] (A camera body having an exposure opening of 11, a film cartridge chamber for accommodating a 35U size film cartridge, and a spool storage chamber for accommodating a spool for winding the film, and a film cartridge chamber within the camera body. A dark box is placed between the camera and the spool storage chamber so as not to block the effective photographing light flux from the photographic lens to the *ffl aperture, a distance measuring device that detects the distance to the subject, and a focusing adjustment lens in the photographic lens. In an autofocusable 35-lens shutter camera that is equipped with a lens position control device that automatically extends the lens and automatically stops the photographic lens at an appropriate extended position in response to a distance measurement signal from a distance measurement device, the camera The lens position control device is placed in a space surrounded by the dark box, the distance measuring device provided above it, the left and right film cartridge chambers, and the spool storage chamber, and the earthen wall of the spool storage chamber. The earthen wall of the film cassette chamber is also shaped like υ, and the distance measuring device is positioned so as to rest on a plane approximately along the earthen wall of the spool chamber, and the lens position control device is positioned so as to lie on a plane that is approximately along the earthen wall of the spool storage chamber. a lens position control cam plate which is rotatably supported by an axis orthogonal to the outer cam surface and controls the position of the focusing lens in the optical axis direction by engaging the focusing lens from the optical axis direction of the photographing lens; and an autofocusable 35U lens shutter camera comprising a locking member that controls the rotational position of the lens position control cam plate based on the distance measurement signal from the distance measurement device.