JPS6188234A - Film information reader - Google Patents

Abstract

PURPOSE:To eliminate the need for unnecessary force during cartridge loading and improve the efficiency of automatic loading by allowing an information reading means to move into a cartridge chamber associatively with the closure of a rear cover. CONSTITUTION:When the rear cover 8 is closed with a cartridge loaded, the lock claw 8a of the rear cover 8 moves beyond the claw part 10a of a lever 10 while pressing the claw part 10a to enter engagement. At this time, the raised part 16a of a lever 16 is pressed with the lock claw 8a, the lever 16 rotates clockwise around a shaft 17, and a transmission part 16b presses down the raised part 21c of a lever 21. Therefore, the lever 21 rotates clockwide around a shaft 22, and a contact piece escape member 15 is released from being energized with an end part 21b of the lever 21 to move with the contacting pressure of a contact piece 13; and the bent part 13a of the contact piece 13 projects into the cartridge chamber 14 through a hole part 9a formed in a main body frame 9 and contacts an information code part on the outer peripheral surface of the cartridge to read a code signal corresponding to film information by the contact piece 13, thereby outputting the signal from a terminal 23.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Application of the Invention) The present invention relates to an improvement in a film information reading device for reading film information from a cartridge equipped with an information code section in which information such as film sensitivity and number of films is encoded. be.

(Background of the Invention) In recent years, as shown in FIG.
Patrone 2 has been proposed. More specifically, the information code section 1 includes a conductive section 1a and a non-conductive section 1b.
The combination of these patterns displays the film A/A sensitivity information etc. of the film 3 loaded in the cartridge 2. Therefore, in order to read film information from such a cartridge 2, it is possible to provide a plurality of contact pieces that come into contact with the information code section 1 on the camera side and detect the electrical continuity state. As one such aspect.

As shown in FIG. 7, a detection lever 5 and contact pieces S, to S6 are fixed to a rotatable shaft 4 that is always biased counterclockwise by a spring (not shown), and the cartridge 2 (see FIG. A device was proposed (Japanese Unexamined Patent Application Publication No. 1983-1981) that reads film information by protruding contact pieces SI to S into the cartridge chamber 6 when the detection lever 5 detects that a film (not shown in the figure) is loaded.
-202524). This is because when the cartridge 2 is not loaded, the shaft 4 is biased counterclockwise by a spring (not shown), so the detection lever 5
A detection part 5a protrudes into the cartridge chamber 6 from a hole 7a formed in the main body frame 7, and when the cartridge 2 is loaded, the outer peripheral surface of the front side of the cartridge 2 is exposed to the detection part 5.
Because you will be pressing a in the direction of the arrow.

The shaft 4 rotates clockwise against the biasing force of a spring (not shown), and the contact pieces S, ~S, move into the cartridge chamber 6 from the hole 7b.
It protrudes inward and comes into contact with the information code section 1 provided on the outer peripheral surface of the cartridge 2 to read film information.

However, in the proposed device, the cartridge 2
Since the loading force is used as the protruding force of the contact pieces S, to s6, extra force is required for loading the cartridge, which prevents smooth loading of the cartridge. Furthermore, even if cartridge 2 is loaded, the detection unit 5
Since the cartridge 2 is subjected to force in the direction of ejection by a, the cartridge 2 protrudes slightly from the cartridge chamber 6, and if the back cover is closed in this state, the film will not roll easily when it is protruded from the cartridge chamber 6. (Curling) may cause the cartridge 2 to rotate and the leading edge of the film may not be accurately placed in the film guide groove.

It sometimes remained twisted, making it unsuitable for cameras with autoloading.

(Purpose of the invention) The object of the present invention is to solve the above-mentioned problems.

To provide a film information reading mechanism that does not require extra force when loading a cartridge and does not cause trouble in automatic loading.

(Features of the Invention) In order to achieve the above object, the present invention provides a transmission means for advancing the reading means into the cartridge chamber in conjunction with the closing of the back cover.

It is characterized in that the reading means is retracted or advanced in response to opening and closing of the back cover.

(Embodiments of the Invention) The present invention will be described below in detail based on illustrated embodiments.

1 to 4 show an embodiment of the present invention. Reference numeral 8 denotes a back cover, and a locking claw 8 that engages with a claw portion of a locking lever described later.
It has a. 9 is the main body frame, 10 is the claw part 10a
The locking lever has a locking lever that is constantly pulled upward by a spring 11, and together with the spring 11 constitutes a back cover locking mechanism. Reference numeral 12 denotes a contact piece unit, in which a contact piece 13 is insert-molded (see Fig. 2.3), and a hole 9 is formed at a position corresponding to the information code part of a cartridge (not shown).
From a, the bent portion 13a of the contact piece 3 is arranged so as to be movable in and out of the cartridge chamber 14. 15 is fitted into a rectangular hole formed between the contact piece unit 12 and the main body frame 9,
It is a contact piece relief member that is biased in the direction of arrow C (see Fig. 1.3) by the contact pressure of the contact piece 13 (direction of arrow B in Fig. 2), and can be operated in the direction opposite to arrow C at any position. It has a stopper portion 15a that regulates the condition (the state shown in FIG. 2). 16 is a transmission lever having a rising portion 16a and a transmission portion 16b;
When the back cover 8 is closed, the locking claw 8a is connected to the rising part 1.
6a to the left in FIG. 1, the transmission lever 16
rotates counterclockwise around the shaft 17 (as shown in FIG. 4). Reference numeral 18 denotes a biasing lever that is rotatable around a shaft 19, and is constantly receiving a clockwise force due to the restoring force of the contact piece relief spring 20. This acts as a force for biasing the contact piece release member 15 in the direction opposite to the direction of arrow C, and the curved portion 13a of the contact piece 13 is retracted from the cartridge chamber 14 (from the state shown in FIG. 3 to the second position).
(to the state shown).

21 has end portions 21a, 21b and a rising portion 21c,
This is an intermediate lever that can be rotated around a shaft 22. When the rising portion 21c is pressed downward by the transmission portion 16b of the transmission lever 16 (when the back cover 8 is closed), the intermediate lever 21 is The contact piece release member 15 rotates clockwise (against the urging force of the urging lever 18), so that the contact piece release member 15
It moves in the direction of arrow C according to the contact pressure (state in Fig. 3).

Note that the restoring force of the contact piece relief spring 20 (
Of course, the force that pulls the object has greater power. 23 is a terminal for outputting film information read by the contact piece 13 to an exposure control circuit (not shown) or the like.

First, the operation when the back cover 8 is opened will be described. When the back cover 8 is opened, the pressing force of the transmission lever 16 is released, and the intermediate lever 21 rotates counterclockwise according to the urging force of the urging lever 18. Then, the contact piece release member 15 is biased toward the left in FIG. The stopper part 15a moves until it comes into contact with the side surface of the contact piece unit 12 (the state shown in FIG. 2). As a result, the contact piece 13 is lifted upward as shown in FIG.
3a retreats from the cartridge room 14. In this state, the cartridge is taken in and taken out.

Next, when the back cover 8 is closed with the cartridge loaded, the locking claw 8a of the back cover 8 moves over the claw 10a of the locking lever 10 while pushing down the claw 10a. , engage as shown in FIG. At this time, since the rising portion 16a of the transmission lever 16 is pressed by the locking pawl 8a, the transmission lever 16 rotates clockwise around the shaft 17, and the transmission portion 16b moves to the rising portion 21 of the intermediate lever 2.
Press c downward. Therefore.

The intermediate lever 21 rotates clockwise around the shaft 22 (
(against the biasing force of the biasing lever 18). intermediate lever 2
1 rotates clockwise.

Since the contact piece release member 15 is no longer biased by the end 21b of the intermediate lever 21, it is now moved in the direction of arrow C by the contact pressure of the contact piece 13 (the state shown in FIG. 3), and the contact piece 13 is bent. Part 1
3a protrudes into the cartridge chamber 14 through a hole 9a formed in the main body frame 9 and comes into contact with an information code section provided on the outer peripheral surface of the cartridge. As a result, the contact piece 13
A code signal corresponding to the film information is read by the operator, and the signal is output from the terminal 23.

According to this embodiment, the locking claw 8a of the back cover 8 is used to lock the contact piece 13 into the cartridge chamber 14 only when the back cover 8 is opened.
Since the configuration is such that it protrudes inward, there is no need to arrange a detection lever, and therefore, the cartridge can be loaded smoothly without requiring extra force when loading the cartridge. In addition, when the back cover 8 is open, there is nothing on the side of the cartridge chamber 14 that prevents the cartridge from entering, so the cartridge can be loaded reliably, and various problems caused by the curling of the film can be avoided. The number of points can be significantly reduced, and the autoloading operation will not be adversely affected in any way. Therefore, the present invention can also be applied to cameras that can be automatically loaded.

In addition, since the contact piece 13 is configured to protrude into the cartridge chamber 14 only when the back cover 8 is closed, the photographer can load the cartridge by tilting it (the film rewinding fork must be moved outside the cartridge chamber). Even in the case of a camera in which it is impossible to , it is possible to prevent the contact piece 13 from being deformed or soiled.

(Correspondence between the invention and the embodiments) In this embodiment, the contact piece 13 and the terminal 23 correspond to the reading means of the present invention, and the contact piece relief member 15 to the shaft 22 and the contact piece unit 12 correspond to the transmission means.

(Modification) In this embodiment, in order to make the contact piece 13 protrude into the cartridge chamber 14 only when the back cover 8 is closed, the transmission lever 16 is
, intermediate lever 21, contact piece unit) 12, contact piece release member 15, urging lever 19, contact piece release spring 20, etc., but the present invention is not limited thereto, and as shown in FIG. The contact piece 26 may be fixed and always biased counterclockwise about the shaft 24 by a spring 27. Note that 28 is a locking claw. Further, although the closing operation of the back cover 8 is transmitted to the transmission lever 16 by the locking pawl 8a, another protruding member may be provided on the back cover 8.

in this case.

It goes without saying that the protruding member may be provided at any position on the back cover 8 as long as it faces the transmission lever. Furthermore,
If the transmission lever is made long so that it is pressed by the back surface of the back cover 8 (the side facing the cartridge chamber) when the back cover 8 is closed, the locking claw 8a can be used or the transmission lever can be pressed by the back cover 8 side. There is no need to newly provide a protrusion member.

Further, if the length of the contact piece relief member 15 is made longer (in the direction of the hole 9a) and the hole portion 9a is covered when the contact piece is retracted, the dustproof effect can be enhanced.At this time, the contact piece relief member It goes without saying that a spring must be added to bias 15 in the direction of arrow C.

Further, although the contact piece 13 is used as a reading means, magnetic or optical pressure reading means may be used.

[Effects of the Invention] As described above, according to the present invention, a transmission means is provided for advancing the reading means into the cartridge chamber in conjunction with the closing of the back cover.

Since the reading means is retracted or advanced in response to opening and closing of the back cover, no extra force is required when loading the cartridge, and there is no problem with auto-loading.

[Brief explanation of drawings]

Fig. 1 is a perspective view showing an embodiment of the present invention, Fig. 2 is a sectional view showing the operation of the main parts when the back cover is opened, and Fig. 3 is a sectional view showing the operation of the main parts when the back cover is closed. Sectional view shown, No. 4
The figure is a partial side view when the back cover is closed, FIG. 5 is a schematic perspective view showing a modified example of the present invention, FIG. 6 is a perspective view of a conventionally proposed cartridge, and FIG. 7 is a conventional film. FIG. 1 is a perspective view showing an example of an information reading device. 8... Back cover, 10... Locking lever, 12... Contact piece unit, 13... Contact piece, 14... Hatrone chamber,
15... Contact piece release member, 16... Transmission lever, 18
...Biasing lever, 20...Contact release spring, 21...
・Intermediate lever, 23...terminal, 24...shaft, 25・
...Transmission lever, 26...Touch piece, 27...Spring. Agent Minoru NakamuraFigure 2Figure 3Figure 4Figure 5Figure 6Figure 7

Claims (1)

[Claims] 1. In a film information reading device that is movably arranged in the cartridge chamber and equipped with a reading means for reading film information from an information code section provided in the cartridge, the reading device A film information reading device comprising a transmission means for advancing the means into the cartridge chamber.