JPH1152477A - Cartridge spool drive mechanism - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To prevent a barcode reading error by detecting a state of an upper fork key. SOLUTION: First and second engaged members (5d, 5d) are provided.
a and 5e), a driving mechanism for driving the cartridge spool having an engaging member (1) engaged with the first engaged member (5d) and a second member supported by the engaging member (1). A driving member (4g) including an engaging portion (4g) that engages with the engaged members (5a, 5e) and directly applies a driving force to the spool, and a support portion (4h) that supports the engaging portion (4g). 4) and a detecting member (2) for detecting a state of the driving member (4). According to a second aspect of the present invention,
The detecting member (2) detects the position of the driving member (4).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cartridge spool driving mechanism for a camera.

[0002]

2. Description of the Related Art The cartridge spool drive mechanism of an APS camera is mainly composed of an upper fork, an upper fork key, and a spring.
Consisted of three parts.

[0003]

However, before the upper fork key is caught in the keyhole of the cartridge,
A false signal of a bar code was generated due to friction or the like, and a bar code reading error sometimes occurred.

The present invention has been made in view of the above problems, and has as its object to prevent a barcode reading error by detecting a state of an upper fork key.

[0005]

In order to achieve this object, a first invention is directed to a first and second engaged members (5d, 5d,
A driving mechanism for driving the cartridge spool having the first and second engaged members (5a, 5e), the engaging member (1) engaging with the first engaged member (5d), and the engaging member (1);
An engaging portion (4g) that engages with the second engaged member (a, 55e) and directly applies a driving force to the spool; and an engaging portion (4g).
A driving member (4) including a supporting portion (4h) for supporting
A detecting member (2) for detecting a state of the driving member (4).

According to a second aspect of the present invention, in the first aspect, the detecting member (2) detects a position of the driving member (4).

According to a third aspect of the present invention, in the first or second aspect, a switch is provided in which the driving member (4) is a movable contact piece and the detection member (2) is a fixed contact piece. The state of the drive member (4) is detected by the opening and closing operation of the detection member (2).

[0008]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a sectional view showing an embodiment of a cartridge spool driving mechanism according to the present invention.

In FIG. 1, the upper fork key 4 is made of a spring material such as stainless steel, phosphor bronze, or synthetic resin as shown in FIG. Upper fork key 4
Is fixed to the upper fork 1 by a hole 4a formed in the upper part (see the upper left part in FIG. 1A). The lower portion of the upper fork 1 has a cylindrical shape, and the cylindrical engagement portion 5 of the cartridge 5 is formed.
engage with d. The protrusion 4g of the upper fork key 4 engages with the brim-like engaging portion 5e of the cartridge 5. When the upper fork key 4 is formed by press working, it is preferable that the surface 4b be a sag surface in consideration of contact with the bank 5b (see FIG. 2A) of the cartridge 5.

The upper fork position detecting member 2 is made of a spring material such as stainless steel, phosphor bronze, or synthetic resin as shown in FIG.
The configuration is as shown in FIG. The upper fork position detecting member 2 is fixed to the upper fork 1 by a hole 2a formed on the upper part (see the upper right part in FIG. 1A).

The upper fork key 4 and the upper fork position detecting member 2 are electrically connected to a camera controller 11 (FIG. 4). When the upper fork key 4 enters the key hole 5a of the cartridge 5, the contact of the upper fork key 4 with the upper fork position detecting member 2 is released, and it is possible to detect that the upper fork key 4 has entered the key hole 5a. . FIG. 2 is a cross-sectional view showing a state in which the upper fork key 4 has not entered the keyhole 5a of the cartridge 5, and as the upper fork 4 rotates, enters the keyhole 5a of the cartridge 5 as shown in FIG. When the upper fork key 4 enters the key hole 5a, the upper fork key 4 jumps out of the center of the upper fork 5 and is fixed as shown in FIG. At this time, when the contact with the upper fork detecting member 2 is released, the signal is transmitted to the camera control unit 11. Camera control unit 11
When the upper fork key 4 and the upper fork detecting member 2 are turned off, the bar code sensor 12
Read as the output of

FIG. 4 is a sectional view for explaining an electric circuit of the cartridge spool driving mechanism. The camera control unit 11 includes a barcode sensor 12, a release switch 13,
Signals are supplied from the L open door detection switch 14 and the cartridge chamber lid switch 15. Camera control unit 11
Based on these signals, the cartridge ejection mechanism 1
6, a film feeding mechanism 17 and an LL door (light lock door (a film entrance / exit door provided on a cartridge spool)) opening / closing mechanism 18 are controlled.

FIG. 5 is a flowchart for explaining the operation of the camera control section 11.

In step S1, the LL door opening / closing mechanism 18
To close the cartridge lid. In step S2, a timer is started. In step S3, it is determined whether or not the counting of the timer has ended. When the operation has been completed, the process proceeds to step S11. If not, the process moves to step S4.

In step S4, the LL open door detection switch 14 determines whether or not the cartridge door is open. If not, the process returns to step S3. If it is open, the process moves to step S5. In step S5, the LL door opening / closing mechanism 18 is controlled to open the cartridge lid. In step S6, the process waits for the LL open door detection switch 14 to open the cartridge door, and then proceeds to step S7. In step S7, barcode detection is started. In step S8, the film feed mechanism 17 is driven to feed the film in the thrust direction. In step S9, the release switch 13
Is turned on to enable the camera to perform a shooting operation. Step S1
In the case of 0, when all frames have been photographed or when a rewind operation is performed, the film feeding mechanism 17 is controlled to perform a rewind operation. In step S11, the cartridge discharging mechanism 1
6 is controlled to take out the cartridge.

Since the fork of the cartridge 5 of the APS camera is fixed unless the LL door opening / closing mechanism 18 is released, the cartridge 5 of the APS camera does not move due to friction when the upper fork 1 rotates. . Therefore, if the LL door opening / closing mechanism 18 is released after detecting that the upper fork key 4 has entered the keyhole 5a of the cartridge 5 (step S5), a barcode reading error can be prevented (step S7).

At a timing T10 shown in FIG. 6, the camera control section 11 detects that the cartridge 5 is loaded, and rotates the upper fork 4. When the upper fork key 4 and the upper fork position detecting member 2 are turned off to detect that the upper fork key 4 has entered the key hole 5a of the cartridge 5, the rotation of the upper fork 4 is stopped by -degree The LL door is opened by the opening / closing mechanism 18. The signal that the LL door is released is transmitted to the camera control unit 11.
, The LL door opening / closing mechanism 18 is stopped, and at timing T30, the upper fork 4 is rotated again, and then a barcode signal is input (step S30).
7). When the determination of the barcode signal ends, the sequence of the barcode signal input ends at timing T40.

According to the above-described embodiment, since the position of the upper fork key 4 can be detected, the bar code signal is not read while the upper fork key 4 is not in the key hole 5a. Code reading errors can be prevented. Also, after the upper fork key 4 is securely inserted into the keyhole 5a of the cartridge, the LL door
By opening the door, the reading of the barcode is eliminated.

In the above-described embodiment, the upper fork key 4 and the upper fork position detecting member 2 have been described as constituting a normally open type switch. However, as shown in FIG. It is also possible to configure as. In the above-described embodiment, the camera is controlled by detecting the open / closed state of the upper fork key 4 and the upper fork position detecting member 2. However, the present invention can be used for other purposes such as issuing an alarm.

[0021]

As described above, according to the cartridge spool drive mechanism of the present invention, the detection member (2) can detect the state of the drive member (4). Thereby, when the driving member (4) is not in an appropriate state, it is possible to use it for control such as issuing an alarm or ignoring the output of the barcode.

[Brief description of the drawings]

FIG. 1 is a sectional view and a perspective view showing an embodiment of a cartridge spool driving mechanism according to the present invention.

FIG. 2 is a sectional view and a top view showing an embodiment of a cartridge spool driving mechanism according to the present invention.

FIG. 3 is a sectional view and a top view showing an embodiment of a cartridge spool driving mechanism according to the present invention.

FIG. 4 is a block connection diagram showing an embodiment of a cartridge spool driving mechanism according to the present invention.

FIG. 5 is a flowchart showing an embodiment of a cartridge spool driving mechanism according to the present invention.

FIG. 6 is a timing chart showing an embodiment of a cartridge spool driving mechanism according to the present invention.

FIG. 7 is a sectional view showing a modified example of the cartridge spool drive mechanism according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper fork 2 Upper fork key 3 Upper fork key position detection means 4 Cartridge fork 10 Upper fork key lock detection section 20 LL door release section 30 Barcode signal input section 40 Barcode signal input completed

Claims (3)

[Claims] 1. A drive mechanism for driving a cartridge spool having first and second engaged members, comprising: an engaging member engaged with the first engaged member; and a supporting member supported by the engaging member. A driving member including an engaging portion that engages with the second engaged member to directly apply a driving force to the spool, and a supporting portion that supports the engaging portion; and a state of the driving member. A cartridge spool drive mechanism comprising: a detection member for detecting. 2. The cartridge spool driving mechanism according to claim 1, wherein said detecting member detects a position of said driving member. 3. A switch wherein the driving member is a movable contact piece and the detection member is a fixed contact piece, and the state of the driving member is detected by opening and closing the driving member and the detection member. The cartridge spool driving mechanism according to claim 1 or 2, wherein