JP3438470B2 - camera - Google Patents

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 in which only a film cartridge in a specific state can be loaded.

[0002]

2. Description of the Related Art Conventionally, as a mechanism for discriminating a double-exposure by discriminating a film cartridge loaded in a camera, for example, there is a mechanism shown in a sectional view of a main part of FIG. This mechanism uses the film cartridge 10 in which the engaging concave portion 29 enabling the detection of the film state can be present in the insertion side end surface 11.

As shown in the plan view of FIG. 6, the film cartridge 10 is a bar code disc fixed to an end of a spool, which is a film winding shaft, from an opening window 16 in an end face 11 of an insertion side of the film cartridge 10. Two
A part of the barcode surface 21 of 0 is exposed. As shown in the plan view of FIG. 7, the bar code surface 21 of the bar code disk 20 is composed of bars 24 and spaces 22 which are alternately arranged in a radial pattern, and the notches 28 correspond to the widest bar 22a. Are formed, and are recessed radially inward from the outer peripheral portion 26 corresponding to the other bars 24 and the spaces 22. Then, the notch 28 of the bar code disk 20 is exposed from the opening window 16 so that the engaging recess 29 exists .

The film cartridge 10 corresponds to the state of the film contained therein, that is, "unexposed", "exposure to halfway", "exposed", and "developed". The stop positions are managed so that they stop at different positions. And
In the case of "unexposed", the outer peripheral portion 26 of the bar code disk 20 is exposed in the opening window 16 of the film cartridge 10, the notch 28 is not exposed, and other "exposed"
The cutout 28 is exposed when “developed” and “partially exposed” corresponding to partial unexposed. Therefore, this film cartridge 10
The state in which the engaging concave portion 29 is present in the insertion side end surface 11 at the time of "exposed" and "developed" and "halfway exposed"
It is supposed to be put in a state .

In the film cartridge chamber 80, as shown in FIG.
A substantially J-shaped film cartridge detection arm 82 for detecting the film state of the film cartridge 10 depending on whether or not it is engaged with the engaging recess 29 of No. 1 is provided. The detection arm 82 is provided so as to face the opening window 16 of the insertion side end surface 11 of the film cartridge 10 as shown by the chain line in FIG. More specifically, as shown in FIG. 8, one end 84 of the detection arm 82 projects into the film cartridge chamber 80 so as to face the opening window 16 of the film cartridge 10, that is, the recess 29 for engagement, while the other end 83 of the detection arm 82 is film cartridge. The film cartridge chamber 80 is pivotally attached to the peripheral wall 86 that is a part of the film cartridge chamber forming wall that configures the chamber 80, and rotates around the other end 83.
Therefore, it is possible to completely retreat into the groove portion 88 formed in the peripheral wall 86 of the film cartridge chamber constituting wall.

Then, as shown in FIG. 8 (I), when the film cartridge 10 in which the engaging concave portion 29 does not exist in the insertion side end surface 11 is axially inserted as shown by an arrow 90, the film cartridge 10 is inserted. The insertion-side end face 11 of the film cartridge 10 pushes the one end 84 of the detection arm 82, and as shown by the solid line, the detection arm 82 is rotated counterclockwise to be retracted into the groove portion 88 of the peripheral wall 86. It can be completely inserted into the chamber 80. On the other hand, as shown in FIG. 8 (II), when the insertion-side end face 11 <br/> film cartridge 10 in a state where the engagement recess 29 present in is inserted in the axial direction as indicated by arrow 90, the detection arm One end 84 of 82 enters the engaging recess 29 of the film cartridge 10 and engages with it, and the detection arm 82 cannot rotate. Therefore, further insertion of the film cartridge 10 is blocked.
(For example, US Pat. No. 5,347,334).

However, as can be seen from FIG. 8 (I), such a J-shaped detection arm 82 swings in a substantially radial direction and retracts from the film cartridge chamber 80. Consumes a significant amount of space outside the. For example, it is necessary to thicken the peripheral wall 86 of the cartridge chamber 80 corresponding to the movement range of the detection arm 82. Therefore, it is difficult to use it for a small camera. This is because the movement of the detection arm 82 directly affects the dimensional configuration of the film cartridge chamber.

[0008]

SUMMARY OF THE INVENTION Therefore, the technical problem to be solved by the present invention is to provide a camera in which the film cartridge detecting arm has little influence on the dimensional configuration of the film cartridge chamber constituting wall.

[0009]

In order to solve the above technical problems, the present invention provides a camera having the following configuration.

[0010] The camera is provided with a film cartridge chamber
Type . In the camera, an L-shaped continuous cutout is formed from an end wall which is a part of a film cartridge chamber constituting wall constituting the film cartridge chamber to a peripheral wall. The camera has a detection arm that is formed in a generally L-shape by a first arm and a second arm, is arranged substantially along the cutout, and has an outer end of the first arm pivotally attached to the end wall . the sensing arm to bias into the film cartridge chamber inside the outer end of the upper Symbol second arm comprises a <br/> the biasing means to project to the film cartridge chamber. The detection arm, when the film cartridge in the state in which the detecting arm engaging recesses in the insertion side end face there is inserted into the film cartridge chamber, enters the above outer end of the upper Symbol second arm on SL recess, the prevents insertion of the film cartridge. On the other hand, when the film cartridge in which the concave portion does not exist on the insertion side end surface is inserted into the film cartridge chamber, the outer end of the second arm is moved by the insertion side end surface .
It is pushed in, the upper Symbol first arm and a second arm, upper <br/> Symbol first rotates around the said outer end of the arm in away the cut of the end wall and peripheral wall of the structure wall Evacuate to
And to permit insertion of the film cartridge.

In the above structure, the film cartridge detecting arm has the outer end of the first arm rotatably fixed to the end wall of the film cartridge chamber forming wall so as to be rotatable between the projecting position and the retracted position. Has become. At the protruding position, the outer end of the second arm of the detection arm projects into the film cartridge chamber. At the retracted position, the first and second arms of the detection arm retract into the notches formed in the end wall and the peripheral wall of the film cartridge chamber, respectively. The detection arm is always in the protruding position by the biasing means. In the protruding position, the outer end of the second arm of the sensing arm, when <br/> film cartridge in the state in which the engagement recess on the insertion side end face there is inserted axially into the film cartridge chamber, the film cartridge It is arranged at a position facing the engaging recess.

The film cartridge detecting arm is provided with a second arm when a film cartridge with no engaging recess is inserted into the film cartridge chamber.
The outer end of the arm is pushed by the end surface of the film cartridge, and the outer end of the first arm pivots to the outside of the film cartridge chamber to the retracted position. That is, the outer end of the first arm, which is the center of rotation of the detection arm, is opposite to the detection arm retracting direction with respect to the outer end of the second arm urged by the end surface of the film cartridge, that is, the radial direction of the film cartridge chamber. Located inside.

Meanwhile, when the fill <br/> arm cartridge in a state where there are recesses for engagement is inserted into the film cartridge chamber, the outer end of the second arm enters the recess for engaging the film cartridge. The outer end of the second arm is pushed in by the insertion of the film cartridge, but its movement in the radial direction is restricted by the engagement with the engagement recess. for that reason,
Since the detection arm cannot rotate, the detection arm is stretched to prevent the film cartridge from being inserted.

In the above structure, the film cartridge detecting arm is rotated between the projecting position located in the film cartridge chamber and the retracted position retracted into the notch of the film cartridge chamber forming wall, and the film cartridge chamber forming wall is formed. It is not located outside of. In addition, the size of the film cartridge constituting wall can be freely determined irrespective of the above-described rotation of the detection arm, and the space consumed by the detection arm can be minimized.

Therefore, in the above structure, the detection arm which is the film cartridge detection member has almost no influence on the dimensional structure of the film cartridge chamber forming wall.

In the above arrangement, the urging means may urge the first arm or the second arm of the detection arm. For example, the biasing means may include a spiral spring that rotates around the outer end of the first arm, or a coil spring that biases the first and / or second detection arms toward the inside of the film cartridge.

Preferably, the biasing means is arranged along the outer surface of the second arm of the detection arm, and is a conductive leaf spring member for biasing the second arm toward the inside of the film cartridge. Including. A conductive contact piece is further provided at a position contacting the leaf spring member when the detection arm is retracted from the film cartridge chamber. The contact between the contact piece and the spring member constitutes an open / close switch.

In the above structure, the leaf spring member arranged along the outer side surface of the second arm of the detection arm requires almost no extra space as in the case of using other types of springs. Further, the leaf spring member constitutes an open / close switch which is in contact with the contact piece to conduct when the detection arm is in the retracted position, and is non-conductive apart from the contact piece when the detection arm is in the protruding position. This open / close switch makes it possible to detect whether or not the film cartridge is inserted in the film cartridge chamber without providing a special sensor.

Therefore, the urging means can be constructed with a simple structure, and it can be detected whether or not the film cartridge is inserted into the film cartridge chamber.

In the above structure, the detection arm is urged to the projecting position by using the urging means. Next, a camera constructed without using the urging means will be described.

[0021] The camera, the film cartridge chamber
It is of the type provided. In the camera, an L-shaped continuous cutout is formed from an end wall which is a part of a film cartridge chamber constituting wall constituting the film cartridge chamber to a peripheral wall. Cameras, generally by a first arm and a second arm a resilient member configured in an L-shape, is disposed along the lack large substantially above SL cutting, the outer end of the second arm is the film cartridge while protruding into the room, biopsies outer end of the first arm is secured to the end wall
Equipped with a knowledge arm . When the film cartridge with the arm engaging concave portion on the insertion side end face is inserted into the film cartridge chamber ,
At the outer end of the upper Symbol second arm enters the upper Symbol recess, prevents the insert of the film cartridge. On the other hand, when the film cartridge in the state without the recess is present in the insertion-side end face is inserted into the film cartridge chamber, Push the upper Symbol insertion side end face the outer end of said second arm rare, upper Symbol first arm and a second arm with <br/> elastically deformed rotates around the outer end of the large substantially above Symbol first arm retracted within away the cut, to allow insertion of the film cartridge.

In the above structure, the outer end of the first arm is fixed to the detection arm in the protruding position. When the film cartridge in which the engaging recess is not present is inserted into the film cartridge chamber, the outer end of the second arm of the detection arm is pushed to the insertion side end surface of the film cartridge. As a result, the detection arm, which is an elastic member, is elastically deformed, and for example, mainly due to the twist near the outer end of the first arm or the bending of the first arm, the detection arm is rotated about the outer end of the first arm to the retracted position. To do.

On the other hand, when the fill <br/> arm cartridge in a state where there are recesses for engagement is inserted into the film cartridge chamber, the outer end of the second arm enters the recess for engaging the film cartridge. The outer end of the second arm is pushed in by the insertion of the film cartridge, but its movement in the radial direction is restricted by the engagement with the engagement recess. Therefore, since the detection arm cannot rotate, the detection arm is stretched to prevent the film cartridge from being inserted. In addition,
The detection arm may be elastically deformed to some extent when the outer end of the second arm is engaged with the engagement recess of the film cartridge and pushed in, but is configured to be able to be stretched with respect to the film cartridge. .

Therefore, in the above structure, it is not necessary to separately provide the biasing means, the number of parts is reduced, and the structure is simplified.

In the above structure, the film cartridge detecting arm may be a member separate from the film cartridge chamber constituting wall, and may be fixed to the end wall of the film cartridge chamber constituting wall.

[0026] Preferably, the detection arm is constructed integrally with the constituent wall.

In the above structure, the outer end of the first arm of the detection arm and the end wall of the film cartridge chamber forming wall are connected so that the film cartridge detecting arm and the film cartridge chamber forming wall are formed of the same member. Therefore, the detection arm can be fixed at the same time when the wall of the film cartridge chamber is formed. Therefore, the structure is simple with a small number of parts, and the manufacturing is simple.

[0028]

DETAILED DESCRIPTION OF THE INVENTION The cameras according to the embodiments of the present invention shown in FIGS. 1 to 5 and 9 will be described in detail below.

First, referring to the sectional view of the main part of FIG.
The first embodiment will be described. This camera is
The film cartridge 10 shown in 7 is loaded. The film cartridge chamber 30 of this camera is formed by a film cartridge chamber constituting wall including a substantially cylindrical peripheral wall 34, end walls 32 at both ends thereof, and a film cartridge chamber lid (not shown). Equipped with. The film cartridge 10 is adapted to be inserted into the film cartridge chamber 30 from the lower side in the drawing in the axial direction as shown by an arrow 92.

The end wall 32 of the wall forming the film cartridge chamber
A fork 38 for driving a spool (not shown) by engaging with an engaging portion 14 (see FIG. 6) provided on the insertion side end surface 11 of the film cartridge 10 is pivotally supported by the. The fork 38 projects into the film cartridge chamber 30. A part 33 of the end wall 32 and a part 35 of the peripheral wall 34 are notched, and a notch 36 that is continuous in a substantially L shape is formed so that a detection arm 40a (described later) can be received. There is.

Film cartridge detecting arm 40a
The first arm 42a and the second arm 44a are formed in a substantially L shape. The first arm 42a of the detection arm 40a
The outer end 41a of the fork 3 of the notch 33 of the end wall 32
It is rotatably fixed to the vicinity of 8. When the detection arm 40a rotates about the outer end 41a of the first arm 42a, the first arm 42a of the detection arm 40a is inserted into the notch 33 of the end wall 32 that constitutes the film cartridge chamber 30,
The second arms 42a are adapted to be received in the notches 35 of the peripheral wall 34, respectively.

The detection arm 40a is urged toward the inside of the film cartridge chamber 30 by a substantially T-shaped plate spring member 46a fixed to the upper portion of the peripheral wall 34. The leaf spring member 46a has a wide portion 46x and a narrow portion 46y. The wide portion 46x is fixed to the outer peripheral surface of the peripheral wall 34, while the narrow portion 4x.
6 y projects into the film cartridge chamber 30 from the notch 35 in the peripheral wall 34 of the film cartridge chamber 30. As shown in FIG. 1 (A), the narrow portion 46y of the leaf spring member 46a biases the second arm 44a of the detection arm 40a, and the detection arm 40a rotates about the outer end 41a to form a film. The cartridge chamber 30 is inserted. The detection arm 40a is regulated by a stopper (not shown) so as not to rotate more than a predetermined amount.
The outer end 43a of the arm 44a is attached to the film cartridge chamber 3
Opening window 16 of film cartridge 10
To face.

Next, the operation when the film cartridge 10 is inserted into the film cartridge chamber 30 having the above structure will be described.

A film state that cannot be photographed by this camera, that is, "exposure halfway", "exposed" or
When the film cartridge 10 is “developed”, the notch 28 of the bar code disk 20 appears in the opening window 16 and the engaging side recess 11 is present in the film cartridge chamber 30, the film cartridge 10 is inserted into the film cartridge chamber 30. 1 (A)
As shown in FIG. 5, the outer end 43a of the second arm 44a of the detection arm 40a enters through the opening window 16 of the film cartridge 10 and enters the notch 28 of the bar code disc 20 and abuts on the intermediate wall 15 of the film cartridge 10. . At this time, since the film cartridge peripheral wall 13 of the film cartridge 10 is higher than the intermediate wall 15, the detection arm 40a moves toward the outer end 43 of the second arm 44a.
Even if a is biased by the intermediate wall 15 of the film cartridge 10, it engages the film cartridge peripheral wall 13 and cannot rotate. Therefore, the film cartridge 10
It is stretched by the detection arm 40a to prevent further insertion.

On the other hand, the film state that can be photographed by this camera, that is, "unexposed", the notch 28 of the bar code disc 20 does not appear in the opening window 16, and the insertion side end surface 1
When the film cartridge 10 in which the engaging recess is not present in 1 is inserted into the film cartridge chamber 30, as shown in FIG. 1B, the outer end 43a of the detection arm 40a is removed from the opening window 16 of the film cartridge 10. It enters and contacts the outer peripheral portion 26 of the barcode disk 20. Since the cartridge peripheral wall 13 around the opening window 16 of the film cartridge 10 is lower than the bar code surface 21 of the bar code disc 20, when the film cartridge 10 is further inserted, the detection arm 40a is rotated more than the center of rotation. Detection arm 40a on the outside in the retreat direction
Since the outer end 43a of the sensor arm 40a is in contact with the bar code disc 20, the outer end 43a of the detection arm 40a is pushed by the outer peripheral portion 26 of the bar code disc 20 and slides on the bar code surface 21 to the outside of the film cartridge 10. Will end up. That is, the detection arm 40a is the outer end 4 of the second arm 44a.
While 3a slides on the bar code surface 21 of the bar code disk 20 of the film cartridge 10, the first arm 4
The outer end 41a of 2a is rotated in the clockwise direction in the figure to retract into the notch 36 of the end wall 32 and the peripheral wall 34 that form the film cartridge chamber 30. Therefore, the film cartridge 10 must be completely inserted until the engagement portion 14 (see FIG. 6) of the insertion side end surface 11 of the film cartridge 10 engages with the fork 38 protruding into the film cartridge chamber 30. Is possible. That is, when the detection arm 40a protruding into the film cartridge chamber 30 detects the insertion of the film cartridge 10 whose film state is "unexposed", the end wall 32 and the peripheral wall 3 forming the film cartridge chamber 30 are detected.
It retreats into the notch 36 of 4.

In the above structure, the detection arm 40a is
It is not arranged outside the end wall 32 and the peripheral wall 34 that configure the film cartridge chamber 30. Further, it is possible to prevent the dimensional structure of the film cartridge chamber 30 from becoming excessively large due to the influence of the detection arm 40a. Therefore, the space required by the detection arm 40a for detecting the film state of the film cartridge inserted into the film cartridge chamber is minimized.

In the first embodiment, the detection arm 40a is used.
Is urged toward the inside of the film cartridge chamber 30 by the leaf spring member 46a.
A second embodiment that eliminates the need will be described with reference to FIG.

The second embodiment will be described with a focus on the difference from the first embodiment. The detection arm 40b is similar to the first embodiment in that it is a substantially L-shaped member including the first arm 42b and the second arm 44b, but the detection arm 40b itself is made of an elastic member. Especially, the vicinity of the outer end 41b of the first arm 42b is easily bent. And the detection arm 40b is
The fork 3 of the cutout 33 of the end wall 32 forming the film cartridge chamber 30 has the outer end 41b so that the outer end 43b faces the opening window 16 of the film cartridge 10.
It is fixed in the vicinity of 6 so as not to be rotatable.

In the above structure, when the film cartridge 10 which cannot be photographed because the film state is "exposure halfway", "exposed" or "developed" is inserted into the film cartridge chamber 30, as shown in FIG. )
As shown in FIG. 1, the detection arm 40 is similar to the first embodiment.
The outer end 43b of b enters into the notch 28 of the bar code disc 20 of the film cartridge 10 and engages with the cartridge peripheral wall 13 of the film cartridge 10 to prevent further insertion of the film cartridge 10.

On the other hand, when the film cartridge 10 which is "unexposed" and can be photographed by this camera is inserted into the film cartridge chamber 30, as shown in FIG. Similarly, the outer end 43b of the detection arm 40b contacts the bar code disc 20 of the film cartridge 10 and is pushed in. At this time, unlike the first embodiment, the detection arm 40b mainly turns around the outer end 41a of the fixed first arm 42b mainly due to the elastic deformation of the first arm 42b and bends, and the detection arm 40b rotates. It retreats into the notch 36 of the end wall 32 and the peripheral wall 34 which constitute 30.

Therefore, by using the elastic member for the detecting arm 40b, the urging member for urging the detecting arm 40b becomes unnecessary, and the structure is simplified.

In the second embodiment, the detection arm 40b which is a separate member is fixed to the notch 33 of the end wall 32 which constitutes the film cartridge chamber 30, but next, the detection arm 40c and the film cartridge chamber 30 are constituted. A third embodiment in which the end wall 32 and the peripheral wall 34 that are formed integrally with each other will be described with reference to FIG.

In the third embodiment, a part of the end wall 32 and the peripheral wall 34 of the film cartridge chamber 30 of the camera, that is, a part corresponding to the notch 36 is formed in the shape of the film cartridge detecting arm 40c. That is, the end wall 32 and the peripheral wall 34 that configure the film cartridge chamber 30 and the detection arm 40c are integrally resin-molded.
The first arm 4 of the film cartridge detection arm 40c
The outer end 41c of 2c is connected to the end wall 34, and the film cartridge detecting arm 40c is formed in an elongated shape so that the film cartridge detecting arm 40c can be elastically deformed. As shown in FIG. 3 (A), the film cartridge detection arm 40c is configured to always project into the film cartridge chamber 30.

In the above structure, the film cartridge detecting arm 40c operates similarly to the second embodiment.
That is, when the "halfway exposed", "exposed" or "developed" film cartridge 10 is inserted into the film cartridge chamber 30, as shown in FIG. 3 (A), the detection arm 40c has a cutout 28c. It goes in and blocks the insertion of the film cartridge 10. On the other hand, when the "unexposed" film cartridge 10 is inserted, the detection arm 40c is elastically deformed, for example, as shown in FIG. 3B, and is rotated about the outer end 41c of the first arm 42c. Then, the film cartridge 10 can be inserted.

Next, the leaf spring member 4 in the first embodiment is used.
A fourth embodiment of the switch S _CART for detecting the insertion of the film cartridge 10 using 6a will be described with reference to FIGS.

The fourth embodiment is basically the same as the first embodiment, except that a switch S _CART is added. That is, the switch S _CART is, as shown in FIG. 4, a leaf spring member 4 for urging the detection arm 40d.
6d is made of conductive material and the film state is "unexposed"
When the film cartridge 10 which is
A conductive contact piece 48d that waits at a position where the leaf spring member 46d reaches by the rotation of the detection arm 40d is provided outside the peripheral wall 36 that constitutes the film cartridge chamber 30,
The end portion 46x of the leaf spring member 46d and the end portion 48x of the contact piece 48d are in contact with each other. This switch S
_CART is a film cartridge that can be used for shooting 1
When 0 is loaded in the film cartridge chamber 30 and the film cartridge detection arm 40d is retracted into the notch 36, the end portion 46x of the leaf spring member 46d and the end portion 48x of the contact piece 48d come into contact with each other and become conductive. Therefore, it becomes "closed". On the other hand, at other times, the detection arm 40d projects into the film cartridge chamber 30, and both ends 46x,
Since the 48x are separated, it becomes "open". Therefore, by opening / closing the switch S _CART , it is possible to detect whether or not the film cartridge 10 is loaded.

The switch S _CART is connected to the control microcomputer 50 as shown in FIG. The control microcomputer 50 switches the film cartridge 10 from the switch S _CART.
When the loading of the film cartridge is transmitted, the display unit 56 displays a picture of the film cartridge. Although not directly related to the present invention, the control microcomputer 50 includes other switches 5
2, namely S _LOCK (lock detection switch for film cartridge chamber), S _PREP (shooting preparation switch), S
_REL (shutter release switch) and S _REW (rewind switch) are connected. Further, devices normally used in the camera, such as the photometric unit 53, the distance measuring unit 54, and the shutter 55, are connected.

FIG. 9 shows a fifth embodiment of the present invention. In each of the above embodiments, the film cartridge 1 is “exposure halfway”, “exposed” or “developed”
When 0 is inserted, the detection arms 40a to 40d stop the insertion of the film cartridge 10. However, when the film arms 10 are forcibly pushed in, the first arms 42a to 42d must be strong enough not to be broken. Therefore, as shown in FIG.
Even if the stopper S is provided integrally with the peripheral wall 34 and the film cartridge 10 is pushed in, after the first arms 42a to 42d are elastically deformed as shown in FIG.
When 40d abuts on the stopper S, the pushing force of the film cartridge 10 is received by the stopper S, so that the force applied to the first arms 42a to 42d can be weakened. At this time, the deformation of the first arms 42a to 42d of the detection arms 40a to 40d is limited by the stopper S, so that a break accident can be prevented, and the second arm 44 can be prevented.
Since a force is applied to the a to 44d in the substantially vertical direction (extension direction), there is no risk of deformation and breakage. With this configuration, it is not necessary to improve the strength of the detection arms 40a to 40d. Although FIG. 9 shows the configuration of FIG. 1 with the stopper S added, it goes without saying that the stopper S can be similarly added in other embodiments.

The present invention is not limited to the above embodiment, but can be implemented in various other modes. For example, depending on the combination of the size of the notch of the bar code of the film cartridge, its stop position corresponding to the film state, the relative position of the film cartridge detection arm with respect to the opening window of the film cartridge, etc.
Not only a film cartridge whose film state is "unexposed", but also a film cartridge which is "exposure halfway" can be inserted into the film cartridge chamber.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a film cartridge chamber according to a first embodiment of the present invention.

FIG. 2 is a sectional view of an essential part of a film cartridge chamber according to a second embodiment of the present invention.

FIG. 3 is a sectional view of an essential part of a film cartridge chamber according to a third embodiment of the present invention.

FIG. 4 is a sectional view of an essential part of a film cartridge chamber according to a fourth embodiment of the present invention.

5 is a block diagram of an electric circuit of the camera of FIG.

FIG. 6 is a plan view of a film cartridge.

FIG. 7 is a plan view of a barcode disc.

FIG. 8 is a sectional view of a main part of a conventional double exposure prevention mechanism.

FIG. 9 is a sectional view of an essential part of a film cartridge chamber according to a fifth embodiment of the present invention.

[Explanation of symbols]

30 film cartridge chamber 32 End wall 33 cutout 34 Peripheral wall 35 cutout 36 Notches 38 forks 40a, 40b, 40c, 40d detection arm 41a, 41b, 41c, 41d outer end 42a, 42b, 42c, 42d 1st arm 43a, 43b, 43c, 43d outer ends 44a, 44b, 44c, 44d Second arm 46a, 46d leaf spring member 46x end 48d contact piece 48x end 50 control microcomputer 52 switch S stopper

─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-7-287299 (JP, A) JP-A-7-287281 (JP, A) JP-A-5-107632 (JP, A) JP-A-4- 1621 (JP, A) Actual development Sho 59-77135 (JP, U) (58) Fields investigated (Int.Cl. ⁷ , DB name) G03B 17/00-17/02 G03B 17/26-17/34 G03B 17/38-17/46

Claims (4)

(57) [Claims] 1. A camera provided with a film cartridge chamber (30), wherein a peripheral wall from an end wall (32) which is a part of a film cartridge chamber constituting wall constituting the film cartridge chamber (30).
Notch (33,35) that continues in L shape over (34)
There is formed, a first arm (42a, 42d) and second arm (44a, 44d) and
The configured roughly L-shaped, lacks large substantially above SL cutting (3
3, 35), and the first arm (42a, 4a)
2d) outer ends (41a, 41d) are pivotally attached to the end wall (32).
Sensing arm (40a, 40d) and urges the detecting arm (40a, 40d) of the film cartridge chamber (30) to the inside, upper Symbol second arm (44a,
The outer end (43a, 43d) of the film cartridge chamber (30) with protruded into the biasing means (46a to 44d), 46d) and provided with said detection arm (40a, 40d), the detection arm insertion side end surface upper Symbol second arm, the above SL recess (28) when the film cartridge in the state in which the recess for engagement (28) are present (10) is inserted into the film cartridge chamber (30)
The outer ends (43a, 43d) of (44a, 44d) enter,
While blocking insert the film cartridge (10), when no said recess to said insertion end surface (28) is present
When the film cartridge (10) is inserted into the film cartridge chamber (30), the upper Symbol insertion side end surface
Therefore, the outer end (43a, 43a, 44d) of the second arm (44a, 44d)
43d) is pushed in, the upper Symbol first arm (42a, 42d) and a second arm (44a, 44d) is, upper Symbol first arm (42
a, the outer end of 42d) (41a, said end wall (32 of the upper <br/> Symbol composite walls to rotate about the 41d)) and lack the cut of the peripheral wall (34) (33, 35) in each retracted, characterized in that to permit insertion of the film cartridge (10),
camera. Wherein said biasing means (46a, 46d) are arranged along the outer surface of the upper Symbol second arm (44d), said second arm (44d) the film cartridge chamber (30) inside The detection arm (40d) includes a conductive leaf spring member (46d) for urging the film cartridge chamber.
A conductive contact piece (48d) is further provided at a position where it comes into contact with the leaf spring member (46d) when retracted from (30), and the contact piece (48d) and the spring member (46d) are brought into contact with each other to open and close. Camera according to claim 1, characterized in that it comprises a switch (SCART). 3. A camera having a film cartridge chamber (30), wherein an L-shape is provided from an end wall (32) which is a part of a film cartridge chamber constituting wall constituting the film cartridge chamber (30) to a peripheral wall (34). A continuous elastic notch (33, 35) formed by a first arm (42 b , 42 c ) and a second arm (44 b , 44 c ) in a substantially L shape. There
Generally, the second arm is arranged along the cutout.
With the outer ends (43 b , 43 c ) of the (44 b , 44 c ) protruding into the film cartridge chamber (30), the first arm
(42 b, 42 c) the outer end of the (41 b, 41 c) is provided with fixed and sensing arm (40 b, 40 c) in said end wall (32), the detection arm (40 b, 40 c) When the film cartridge (10) having the arm engaging concave portion (28) on the insertion side end surface is inserted into the film cartridge chamber (30), the second arm (44) is inserted into the concave portion (28).
(b , 44 c ) The outer ends (43 b , 43 c ) of the film cartridge enter to prevent the film cartridge (10) from being inserted, while the insertion side end face does not have the recess (28). (10) is the film cartridge chamber
When inserted in (30), the outer end (43 b , 43 c ) of the second arm (44 b , 44 c ) is moved by the insertion side end face.
Is pushed in, the first arm (42 b , 42 c ) and the second arm (44 b , 44 c ) are elastically deformed, and the outer end (41 b ) of the first arm (42 b , 42 c ) is roughly. , 41 c ), and is retracted into the notch (33, 35) to allow the film cartridge (10) to be inserted. 4. The detection arm (40c) comprises the constituent wall.
(32,34) is integrally configured,
The camera according to claim 3.