JPH07301851A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera having simple constitution and capable of smoothly feeding film in a state where load is not imposed by a magnetic head, a pad and a pressing plate. CONSTITUTION:In this camera, a cartridge 11a capable of feeding the film 11b where magnetic recording can be performed by rotating a spool to the outside is used; and the camera is provided with a zoom motor 31 making a lens barrel consisting of a lens frame 12 and a zoom ring 1, etc., in a collapsible state, the magnetic head 8 recording magnetic information by coming in contact with the film 11b, a film path forming means forming the path for the film 11b and constituted of the pressing plate 7 holding the magnetic head 8, a camera main body 3, end face cams 1b, 1c, 1d and 1e and pressing plate pushing-up pins 2a, 2b, 2c and 2d and a CPU controlling the action of the zoom motor 31. By the collapsing operation of the lens barrel, the film path formed of the film path forming means is extended and the magnetic head 8 is retreated from a position where it comes in contact with the film 11b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly to a camera using a patrone capable of sending a magnetically recordable film to the outside by rotating a spool.

[0002]

2. Description of the Related Art Conventionally, various cameras have been proposed as a camera using a patrone capable of sending a magnetically recordable film to the outside by rotating a spool.

Such a camera is provided with, for example, a magnetic head as recording means for performing magnetic recording, and recording is performed by bringing the magnetic head into contact with a film. .

When the above cartridge is loaded in such a camera, the cartridge shaft provided in the cartridge is rotated to feed the film out of the cartridge, and the film reaches the take-up spool of the camera. By engaging with the claws of the take-up spool or the like, the first frame is fed in the air.

When the magnetic head is in a position where it can be brought into contact with the film when the film is fed to the take-up spool, the film is caught by the magnetic head and the film is well fed. May not be.

As an example of a camera in view of such a point, for example, Japanese Patent Application Laid-Open No. 3-249632 discloses a magnetic head that retracts from a film passage as needed.

Further, as another example of the above-mentioned camera, Japanese Patent Laid-Open No. 378042/1993 describes a pad for pressing a film against a magnetic head as necessary, which is retracted from a film passage. There is.

[0008]

However, in the camera described in Japanese Patent Laid-Open No. 3-249632, even if the magnetic head is retracted at the time of feeding the film, the film is kept in order to ensure the flatness of the film. The film remains impenetrable due to the resistance of the pressing platen.

Further, in the one disclosed in the above-mentioned Japanese Patent Laid-Open No. 378042, even if the pad is retracted at the time of feeding the film, the film still remains hard to pass due to the resistance of the pressure plate and the magnetic head.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a camera having a simple structure capable of smoothly feeding a film.

[0011]

In order to achieve the above object, a camera according to the present invention is a camera using a patrone capable of sending a magnetically recordable film to the outside by rotating a spool. A collapsing operation means for retracting the cylinder; a recording means for contacting the film to record magnetic information on the film; a film passage forming means for forming a passage for the film and holding the recording means; And a control means for controlling the operation of the collapsing operation means, which enlarges the film passage formed by the film passage forming means by the collapsing operation of the lens barrel and retracts the recording means from a position in contact with the film. It is what makes me.

[0012]

The collapsing operation means brings the lens barrel into a retracted state, the recording means contacts the film to record magnetic information on the film, and the film passage forming means forms the passage of the film and the recording means. The holding means controls the operation of the collapsing operation means, expands the film passage formed by the film passage forming means by the collapsing movement of the lens barrel, and causes the recording means to come into contact with the film. Evacuate.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show a first embodiment of the present invention, and FIG. 1 is an exploded perspective view showing a main part of the configuration of a camera,
2 is a block diagram showing the configuration of the camera, FIG. 3 is a sectional view showing the state of the pressure plate, the magnetic head, and the pad at the time of photographing,
FIG. 4 is a sectional view showing a state where the pressure plate, the magnetic head, and the pad are retracted from the film passage at the time of collapsing, and FIG. 5 is a sectional view taken along the line AA ′ in FIG.
FIG. 6 is a sectional view taken along the line AA 'of FIG. 1 showing the distance between the film passages when the film is retracted, and FIG.

In this camera, as shown in FIG. 1, a lens frame 12 for holding a taking lens (not shown) in order from the front side of the optical axis, and a zoom cam ring 1 for moving the lens frame 12 forward and backward in the optical axis direction. A camera body 3 forming a film passage forming means having a rectangular aperture 3m provided at a substantially central portion thereof, and a pressure plate 7 forming a film passage forming means for pressing the film 11b to enhance its flatness. A pressure spring 9 as a pressing means for pressing the pressure plate 7 toward the camera body 3 and a rear lid 10 forming a part of the exterior of the camera are provided.

The lens frame 12 is a substantially cylindrical member forming a lens barrel, and has a plurality of cam followers 1 on its peripheral surface.
2a is projected.

The zoom cam ring 1 is a substantially cylindrical member that also constitutes a lens barrel, and a cam 1a into which the cam follower 12a provided on the peripheral surface thereof is fitted,
A rack 1f formed so as to project in an arc shape at the end of the same circumferential surface on the rear side of the optical axis, and a plurality of end surface cams constituting the film passage forming means provided on the end surface on the rear side of the optical axis along the circumferential direction. 1b, 1c, 1d, 1e.

The end cams 1b of the zoom cam ring 1,
One end of a pressure plate push-up pin 2a, 2b, 2c, 2d, which is a connecting member that constitutes a film passage forming means for pushing up the pressure plate 7, comes into contact with the pins 1c, 1d, 1e. 2a, 2b, 2c, 2
d moves back and forth along the optical axis direction.

The pressure plate pushing-up pins 2a, 2b, 2c,
2d is formed in a shape in which both ends are rounded, and a flange-shaped convex portion is provided so as to project at a substantially central portion thereof. Then, springs 6a, 6b, 6c, 6d are fitted in the pressure plate pushing-up pins 2a, 2b, 2c, 2d so as to lock one end to the flange-shaped convex portion.

Among these, the pressure plate pushing-up pin 2d includes
A hole is bored on the side of the flange-shaped convex portion on the front side of the optical axis, and one end portion of the leaf spring 4 having a bent shape is inserted therethrough. The leaf spring 4 is for urging the pad 5 toward a magnetic head 8 described later.

The camera body 3 includes the aperture 3
The film rail 3e is provided on the upper side and the film rail 3f is provided on the lower side with the m interposed therebetween.
On the upper side of e, a rail 3h having a higher rail height is
A rail 3i having a higher rail height is provided below the film rail 3f. The film rails 3e, 3f are for receiving the film 11b, and the rails 3h, 3i are for the film 11b.
And for receiving the pressure plate 7.

The camera body 3 is further provided with holes 3a, 3b, 3c, 3d for inserting one end portions of the pressure plate pushing-up pins 2a, 2b, 2c, 2d into the pressure plate 7 side.
And a pad hole 3g for the pad 5 to receive the magnetic head 8 is formed.

By inserting one end portions of the pressure plate pushing-up pins 2a, 2b, 2c, 2d into these holes 3a, 3b, 3c, 3d, respectively, the pins 2a, 2b, 2c,
The spring 2a is biased by the springs 6a, 6b, 6c, 6d in the direction from the camera body 3 toward the end cams 1b, 1c, 1d, 1e.

Grooves 7a and 7b into which the rails 3h and 3i of the camera body 3 are loosely fitted are engraved on the pressure plate 7, and a magnetic head 8 is provided at a position facing the pad hole 3g of the camera body 3. A hole 7c for fixing is formed.

The magnetic head 8 as the recording means is fixed to the pressure plate 7 so that its magnetic recording surface is flush with the film receiving surface of the pressure plate 7.

The pressure plate 7 has a pressure spring 9 having a substantially H shape.
The rear cover 10 to the rail 3 of the camera body 3
It is biased towards h and 3i.

On the rack 1f of the zoom cam ring 1, the output shaft 31b of the zoom motor 31, which is a collapsing operation means, is provided.
The pinion gear 31a fixed to the gear meshes with it. The zoom motor 31 drives the zoom of the lens frame 12 holding the photographing lens by rotating the zoom cam ring 1 around the optical axis.

The zoom motor 31 is also meshed with a gear 32a which is integrally rotatable with a disc 32 having a plurality of holes elongated in the radial direction along the circumferential direction, and the hole of the disc 32 is detected. A U-shaped photo interrupter (hereinafter abbreviated as PI) 33 is provided as much as possible.

The PI 33 measures the amount of rotation of the zoom motor 31 and outputs it to a CPU 41 (see FIG. 2) described later. By referring to this signal, the CPU 41 sets the zoom cam ring 1 to a predetermined value. It is designed to control the position.

Further, the camera is provided with a feed motor 21, and a pinion gear 21a provided integrally with the output shaft 21b of the feed motor 21 in a rotatable manner is connected to a fork 23 via a reduction gear 22. It meshes with the gear 23a that is integrally rotated.

The fork 23 is adapted to engage with a patrone shaft (not shown) provided in the film feeding system patrone 11a, and the film 11b is fed out or rewound by rotating the patrone shaft. Is to do.

Next, as shown in FIG. 2, the camera is provided with a CPU 41 which is a control means for controlling various controls, and the CPU 41 has a first CPU for driving the feeding motor 21. The drive circuit 25 and the zoom motor 31
A second drive circuit 35 for driving the
And a cartridge cover switch 42 for detecting the state of the cartridge cover that opens and closes when the cartridge 11a is loaded.
And a rewind switch 43 used when rewinding the film 11b is electrically connected.

Next, the operation of the first embodiment will be described along the flowchart of FIG. 7 and with reference to FIGS. 3 to 6.

Film feeding system cartridge 11a
When the camera is set to the camera and the patrone lid which is the lid of the patrone chamber is closed, the CPU 41 detects that the patrone lid switch 42 is turned on (step S
1) It is determined whether or not the lens barrel is in the collapsed state (step S2).

If the lens barrel is in the retracted state in step S2, the process proceeds to step S6, which will be described later.

When the lens barrel is not in the retracted state in step S2, the drive circuit 35 drives the zoom motor 31 (step S3), and the rotation amount of the zoom motor 31 is detected by the PI 33 of the disk 32. While reading by doing so, it is determined whether or not the lens barrel is in the collapsed state (step S4).

If it is not in the retracted state in step S4, the process returns to step S3 and the zoom cam ring 1 is rotated until the retracted state is reached.

When it is determined in step S4 that the lens barrel is in the retracted state, the end face cams 1b, 1c, 1d and 1e.
Is in a state in which the pressure plate pushing-up pins 2a, 2b, 2c, 2d are respectively pushed up toward the pressure plate 7 against the biasing forces of the springs 6a, 6b, 6c, 6d.

As a result, the pressure plate 7 is pushed up against the rear lid 10 against the biasing force of the pressure spring 9.
The height dimensions of the rails 3h and 3i are determined so that the engagement between the rails 3h and 3i and the grooves 7a and 7b is maintained even when the pressure plate 7 moves away from the camera body 3. Has been.

The state at this time is as shown in FIGS. 4 and 6, and the pressure plate 7 to which the magnetic head 8 is fixed is separated from the rails 3i and 3h, and the pad 5 serves as the pressure plate pushing-up pin 2d. The leaf spring 4 connecting the pad 5 moves the zoom cam ring 1 toward the zoom cam ring 1 (on the front side of the optical axis).

By this operation, the magnetic head 8 and the pad 5 are retracted from the film passage 15, and the tunnel interval h of the film passage 15 is expanded as shown in FIG. The tunnel distance h is the distance from the tips of the film rails 3e and 3f to the surface of the pressure plate 7 facing the film 11b.

When the zoom motor 31 is stopped after the collapsed state is confirmed (step S5), the feeding motor 21 is driven through the drive circuit 25 (step S6).
The film feed system cartridge 11a to film 11b are enlarged as shown in FIG.
It is sent to 5.

By detecting the feeding of the film 11b by a detecting means (not shown), it is judged whether or not the feeding is carried out to a predetermined position (step S).
7).

If the predetermined position has not been reached, the process returns to step S6 and the drive of the feeding motor 21 is continued, while
After confirming that it has been sent to the specified position, the CPU
41 stops the feeding motor 21 via the drive circuit 25 (step S8).

Next, the zoom motor 31 drives a film winding spool (not shown) provided on the camera body 3 side, and a film loading operation for winding the film 11b on the winding spool is performed (step S).
9).

Further, the state of the main switch of the camera is detected by a detecting means (not shown) (step S10),
When the main switch is off, the sequence is finished as it is (that is, the lens barrel is retracted) (step S14).

On the other hand, if the main switch is turned on in step S10, the CPU 41 causes the zoom motor 3 to operate.
1 is driven (step S11), the zoom cam ring 1 is rotated, and the lens frame 12 is moved to the shooting state.

At this time, the pressure plate lifting pins 2a, 2
b, 2c and 2d are end cams 1 of the zoom cam ring 1.
It moves in the direction away from the camera body 3 (that is, the optical axis front side) along b, 1c, 1d, and 1e.

As a result, the pressure plate 7 to which the magnetic head 8 is fixed is pushed toward the front side of the optical axis by the urging force of the pressure spring 9 as shown in FIG.
It comes into contact with the rails 3h and 3i, and is moved to a predetermined position in the optical axis direction such that the film 11b is held on the image forming surface of the photographing lens.

At this time, the pad 5 is pushed up toward the rear side of the optical axis by the leaf spring 4 connected to the pressure plate pushing up pin 2d, as shown in FIG.
b is pressed against the magnetic head 8 so that the magnetic recording layer of the film 11b contacts the magnetic head 8 with an appropriate pressing force.

As described above, the magnetic head 8 is fixed to the pressure plate 7 so that the surface for contacting the film 11b for magnetic recording is flush with the surface of the pressure plate 7 for contacting the film 11b. Therefore, the flatness of the film 11b is not lost even in the arrangement at the time of photographing as shown in FIG.

The rotation state of the zoom cam ring 1 is set to PI33.
It is determined whether or not the zoom cam ring 1 has rotated until the photographing state is reached (step S12), and if the photographing state is not reached yet, the process returns to step S11 to continue driving the zoom motor 31.

When it is determined in step S12 that the photographing state is set, the CPU 41 stops the zoom motor 31 (step S13) and ends this sequence (step S14).

The rewinding of the film 11b is also performed after the lens barrel is retracted and the film passage 15 is enlarged.

According to the first embodiment as described above, the distance between the film passages can be increased only by retracting the lens barrel when the film is fed, and the film can be fed smoothly. Further, since the magnetic head is fixed to the pressure plate, it is possible to simultaneously retract the magnetic head from the film passage during the collapsing, and it is not necessary to specially provide a retracting means dedicated to the magnetic head. Therefore, the cost can be reduced.

FIG. 8 shows a second embodiment of the present invention, and is an exploded perspective view showing the main part of the structure of the camera. In the second embodiment, description of the same parts as those of the first embodiment described above will be omitted, and mainly different points will be described.

The zoom cam ring 1 of the second embodiment is
A plurality of end face cams 1b, 1c provided on the end face on the rear side of the optical axis,
Instead of arranging 1d and 1e all on the same circumference, 2
It is divided into two parts and each part is provided on two different circumferences.

That is, the end surface cams 1c and 1e are arranged on the same outer circumference, and the end surface cams 1b and 1d are arranged on the same inner circumference having a slightly smaller diameter, respectively, at substantially bisected positions in the circumferential direction. It is arranged.

Further, the leading end of the film 11b housed in the cartridge 11a has an obliquely cut shape so that it can be fed out more easily. The configuration of the other parts is almost the same as that of the above-mentioned first embodiment, and therefore its explanation is omitted.

The operation of the second embodiment is almost the same as that of the above-mentioned first embodiment, except for the points described below.

In recent years, many cameras are equipped with a high-power zoom lens, and in order to secure a large amount of movement of the zoom lens group, the range of angles in which the zoom cam ring 1 can be rotated is large. desirable.

Therefore, as described above, the end face cams 1b and 1d are provided.
By arranging the end face cams 1c and 1e on different circles, the range in which the pressure plate pushing-up pins 2a, 2b, 2c and 2d can contact and move is the same as the reference numeral of FIG. 1 in the first embodiment. Range indicated by P to Q (about a quarter of the circumference)
In contrast to this, in the second embodiment, the symbols R to R in FIG.
It becomes as large as S (about one half of the circumference), and roughly speaking, it is possible to secure a rotation angle approximately twice.

Thus, the pressure plate lifting pins 2a, 2b,
The rotatable angular range of the zoom cam ring 1 regulated by contact with the 2c and 2d is greatly increased.

According to the second embodiment, the same effect as that of the first embodiment is provided, and the rotatable angle of the zoom cam ring is increased to secure a large movement amount of the zoom lens group. Therefore, it becomes easy to mount the high-power zoom lens on the camera.

9 and 10 show a third embodiment of the present invention. FIG. 9 is a sectional view showing the distance between the film passages during photographing, and FIG. 10 shows the distance between the film passages during the collapsing. FIG.

In the third embodiment, description of the same parts as those of the first and second embodiments described above will be omitted, and only different points will be mainly described.

In the third embodiment, four pressure plate push-up pins are provided in the above-described first and second embodiments, whereas two pressure plate push-up pins 2a and 2d are provided on the side of the cartridge 11a.
It has been changed to a book only.

Accordingly, although not shown, the end cams of the zoom cam ring 1 are also provided with only two end cams 1b and 1e corresponding to the two pressure plate lifting pins 2a and 2d.

Although not shown in FIGS. 9 and 10, the magnetic head 8 is fixed to the pressure plate 7 on the side of the cartridge 11 (see FIG. 1).

Next, the operation of the third embodiment will be described.
When the film 11b is sent out from the cartridge 11a, the lens barrel is retracted.

Then, as shown in FIG. 10, the end portion of the pressure plate 7 on the side of the cartridge 11a has the pressure plate push-up pins 2a, 2
It is pushed up by d and the patrone 11 of this pressure plate 7
The magnetic head 5 fixed to the a side is also retracted integrally.

Further, the pad 5 also has a pressure plate lifting pin 2d.
According to the movement of the film, the film is retracted from the film passage as described in the first embodiment.

The film 11b is sent toward the take-up spool of the camera through the film passage 15 thus enlarged.

At this time, since the other end side of the pressure plate 7 does not have a special retracting mechanism, the pressure plate 7 is not parallel to the camera body 3, but when the film feeding is completed, Needless to say, the flatness of the film 11b is ensured by returning to parallel as shown in FIG.

According to the third embodiment as described above, the same effects as those of the first embodiment described above are obtained, and the pressure plate pushing-up pins are two, so that the mechanism is simplified and the cost can be further reduced. it can.

The method of retracting the pressure plate and expanding the film passage is not limited to the method described in the above embodiment.

For example, in the case of using a film whose tip is obliquely cut as shown in FIG. 8, the height of the end face cams is made different from each other, and the pressure plate by four pressure plate push-up pins is used. The withdrawal amount of each film is set to a different height, and the apex side of the film tip cut diagonally (Fig.
It is also possible to increase the amount of retreat of the upper part) to smooth the feeding of the film front end.

Further, the entire pressure plate is retracted from the film passage in the same manner as in the first embodiment, but at this time, 4
The withdrawal amounts of the pressure plates by the two pressure plate lifting pins may be set to different heights to make the withdrawal amount on the cartridge side larger than the withdrawal amount on the film take-up spool side of the camera.

[Additional Notes] According to the embodiment of the present invention as described in detail above, the following constitution can be obtained.
That is, (1) In a camera using a cartridge capable of sending a magnetically recordable film to the outside by rotating a spool, a collapsing operation means for collapsing a lens barrel and the film are brought into contact with the film. The recording medium is provided with recording means for recording magnetic information on the film, film passage forming means for forming the passage of the film and holding the recording means, and control means for controlling the operation of the collapsing operation means. A camera for expanding the film passage formed by the film passage forming means by retracting the lens barrel and retracting the recording means from a position in contact with the film.

(2) The camera according to appendix 1, wherein the collapsing operation means comprises a zoom motor and a lens moving means for changing the focal length of the lens barrel in the photographing optical system.

(3) The camera described in appendix 1, wherein the recording means comprises a magnetic head and a pressing means for pressing the magnetic head and the film.

(4) The film passage forming means has a cam provided on the lens barrel, a pressure plate to which the recording means is fixed and which can move forward and backward, and a connecting member which connects the cam and the pressure plate. The camera according to appendix 1, characterized in that

(5) The camera according to appendix 3, wherein the film passage forming means has a film guide member having an upper surface higher than a contact surface of the pressure plate with the film.

(6) The camera according to appendix 1, wherein the control means controls a retracted state when the film is fed.

(7) The camera according to appendix 1, wherein the control means controls the retracted state when the film is rewound.

(8) The camera described in Appendix 4, wherein the cam is an end face cam provided on the end face of the lens driving member, and is arranged on the same circumference or on different circumferences.

[0086]

As described above, according to the present invention, a camera having a simple structure capable of smoothly feeding a film can be obtained.

[Brief description of drawings]

FIG. 1 is an exploded perspective view showing a main part of the configuration of a camera according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing the configuration of the camera of the first embodiment.

FIG. 3 is a sectional view showing a state of a pressure plate, a magnetic head and a pad at the time of photographing in the first embodiment.

FIG. 4 is a cross-sectional view showing a state in which the pressure plate, the magnetic head, and the pad are retracted from the film passage at the time of collapsing in the first embodiment.

5 is a sectional view taken along the line AA ′ in FIG. 1 showing the distance between the film passages during shooting in the first embodiment.

FIG. 6 is a sectional view taken along the line AA ′ in FIG. 1 showing the distance between the film passages when retracted in the first embodiment.

FIG. 7 is a flow chart showing an operation when the film is loaded with the cartridge loaded in the first embodiment.

FIG. 8 is an exploded perspective view showing the main parts of the configuration of the camera of the second embodiment of the present invention.

FIG. 9 is a cross-sectional view showing the distance between the film passages during shooting in the third embodiment of the present invention.

FIG. 10 is a cross-sectional view showing the distance between the film passages when retracted in the third embodiment.

[Explanation of symbols]

1 ... Zoom cam ring (lens barrel, lens driving member) 1b, 1c, 1d, 1e ... End face cam (film passage forming means) 2a, 2b, 2c, 2d ... Pressure plate push-up pin (film passage forming means) 3 ... Camera body (Film path forming means) 4 ... Leaf spring 5 ... Pads 6a, 6b, 6c, 6d ... Spring 7 ... Pressure plate (film path forming means) 8 ... Magnetic head (recording means) 9 ... Pressure spring 9 (pressing means) 12 ... Lens frame (lens barrel) 15 ... Film passage 31 ... Zoom motor (collapse operation means) 41 ... CPU (control means)

Claims (1)

[Claims] 1. A camera using a patrone capable of sending a magnetically recordable film to the outside by rotating a spool, a collapsing operation means for collapsing a lens barrel, and contacting the film. A recording means for recording magnetic information on the film; a film passage forming means for forming the passage of the film and holding the recording means; and a control means for controlling the operation of the collapsing operation means. A camera for expanding the film passage formed by the film passage forming means by retracting the lens barrel and for retracting the recording means from a position in contact with the film.