JPS60113215A - Camera equipped with film information reader - Google Patents

Abstract

PURPOSE:To attain a test mode during manufacture adjustment by providing a function part for operation which is not specified according to specific information among pieces of film information provided to a film magazine. CONSTITUTION:Pieces of information of exposed frame quantity detection areas 8-10 of a film information recording part 21 provided on the film magazine 20 are inputted to a decoder 22, and signals corresponding to the quantities of exposed frames are outputted from respective terminals. Terminals between 36 and 72 are normally unused and this part is used for the test mode in manufacture adjustment; when this part is used for a decoder output, an electromagnet MG for releasing and holding shutter blades is held on until a switch SW is turned off. Thus, bulb operation is carried out to facilitate the focusion of the lens.

Description

Detailed Description of the Invention (Technical Field) The present invention relates to a camera equipped with a film information reading device that reads various film information from a film information recording section provided in a film magazine and inputs the information. be.

(Prior Art) When adjusting or testing a camera during the manufacturing process or upon completion, the camera is often operated in a manner other than the specifications that the camera should ultimately have. For example, many relatively simple cameras do not have a pulp shooting function as a final specification, but during the camera manufacturing process, when testing the focusing function of the lens, it is necessary to open the shutter using a bulb shooting operation. You need to leave it alone.

However, with conventional cameras, if you try to make them perform operations outside of the final specifications described above, it is necessary to input electrical signals or apply mechanical operating force to a part of the camera from the outside. In order to do this, a part of the camera must be disassembled or an extra terminal for testing must be provided, which makes the structure complicated and the adjustment work troublesome.

(Objective) The object of the present invention is to provide a film information reading device that allows the camera to perform operations that are not in the final specifications of the camera without adding any mechanical or electrical components to the camera. The goal is to provide cameras with the following features.

(Structure) A feature of the present invention is that a film magazine having a film information recording section in which film information is coded and recorded is used, and among the film information read out from this magazine, information that is used extremely infrequently or The idea is to select a small number of combinations, and when the selected information is input, a special operation that is not in the final specifications of the camera is performed.The structure is based on the film information record coded in the film magazine. In a camera comprising a reading section for reading a film information signal from a part or all of the section, and a decoder for decoding the read signal of this reading section and determining the film information, It has a functional section that provides a special function not included in the final specifications of the camera by being given specific information from among the film information.

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

The present invention utilizes a film magazine provided with a film information recording section as shown in FIG. 1, for example.

The film information recording section in Figure 1 is an example of the DX code published by Kodak, and film information detection areas numbered 1 to 112 are provided on the film magazine, and numbers 1 and 7 are grounded. Numbers 2 to 6 are film sensitivity recording areas, numbers 8 to 10 are frame number areas, and numbers 11 and 12 are exposure ranges, that is, latitude recording areas. is encoded by an electrically conductive portion and an insulating portion, and the film information is determined by reading this encoded signal.

Next, the present invention will be described in detail using a film magazine having a film information recording section as described above.

In FIG. 2, the detection area No. 7 in the film information recording section 21 provided on the film magazine 2o is detected by the contact s7 as a reading section and the decoder 2
It is designed to be input to 2 and also grounded, and 8
The photographic number detection areas from No. 1 to No. 1o are detected by respective contacts s8, s9, and SIO serving as reading sections, and are input to the decoder 22, respectively. The decoder 22 decodes the coded signals from the contacts s8 and S9.310, and outputs a signal corresponding to the number of shots from each terminal based on the coded signal from the number-of-shots detection area. ing. Symbol B is a power supply, S- is a switch that closes in conjunction with pressing down of the release button, etc., MG is an electromagnet that can keep the shutter blade in an open state while it is energized, and TR is the electromagnet mentioned above. 23 is an autofocus circuit.

Here, if we look at the code combinations of the above-mentioned photographic number detection areas from No. 8 to No. 10, they are determined as shown in Table 1. This indicates that the portion of the detection area in Table 1 with a number written in it is electrically conductive to the ground contact s7,
The "-" part indicates that it is insulated.

(Table 1).

Decimal value Number of shots Detection area Decimal Number of 5enSin
Areah frog gall nt Ex 赳■ AnimalS illusion S9 肚1
128-- 2 20-9- 3 24 8 9 - 4 36 --10 5-8 - 10 5 - 9 10 7 728910 From the table above, the decimal values 5 and 6 determine the number of shots when decoded. Not yet. Therefore, when 5 or 6 becomes the output of the decoder 22, the output of the decoder is input to the base of the transistor TH via the resistor R so as to excite the electromagnet MG until the switch S- is turned off. Connecting. In this way, the shutter can be held in an open state until the switch S is turned off, so that an operation similar to a valve operation can be performed, and tasks such as focusing the lens can be easily performed.

At this time, the autofocus circuit 23 can also be adjusted or tested. The information signal of the number of shots outputted from the decoder 22 is input to a predetermined part other than the camera and is used for displaying the number of shots, etc.

Next, the embodiment shown in FIG. 3 will be explained. The example shown in FIG. 3 is an example in which film sensitivity detection areas numbered 1 to 6 are used among the film information detection areas 21 of the film magazine 20. to No. 4 to the reading unit and L7 (7) contacts Sl, S2, S
3. Detection is made at S4, contact S1 is grounded, and the remaining contacts S2, S3, and S4 are used to set the film sensitivity to l5O.
25 to 5000 are identified by IHV steps. Table 2 below shows the film sensitivity (ISO standard) for combinations of detection areas 2 to 6.
This shows the value of .

(Table 2) Film sensitivity Sensing Area
■Gloss button average L Figure Figure Mg evil 25 - - - 5 - 32 - - 5 4o - - 56 502 - - 5 - 642 - - 6 802 - - 56 100 - 3 - 5 - 125 - 3 - - 6 160-3-56 20023-5- 25023--6 32023-56 400--45- 500--4-6 640--456 8002-45- 10002-4-6 12502-456 1600-345- 2000-34 -6 2500-3456 32002345- 4000234-6 500023456 As shown in Table 2, film sensitivity can be determined finely by using all detection areas from No. 2 to No. 6, but the example shown in FIG. uses only three code signals No. 2 to No. 4, and determines film sensitivity based on the combination of these code signals. Therefore, the third
According to the example shown in the figure, film sensitivity values are output as sets of three, as displayed on the output side of the decoder. In Table 2, for example l5O3200
Since it is extremely rare that a film with a sensitivity higher than that is used, if a sensitivity higher than 15O3200 is selected,
The output of the decoder 22 corresponding to the transistor TR
2, the electromagnet MG is energized and the shutter is held in the open state until the switch S- is turned off, as in the example of FIG. In this way, by selecting a sensitivity of 15O3200 or higher, you can release the shutter and make adjustments to the camera's focus that are not in the final specifications, and since sensitivities of 15O3200 or higher are usually rarely used, there is little actual damage. do not have.

In addition, if all detection areas from No. 2 to No. 6 are used,
It is also possible to select a film sensitivity value that is not actually used, and to provide a special function as described above when that value is input.

In Kodak's DX code, in addition to the frame number information and film sensitivity information mentioned above, information indicating the exposure range (latitude) that allows proper imprinting is recorded in detection areas No. 11 and 12. . Table 3 shows the codes for the above exposure ranges.

(Table 3) Exposure range Detection area With the three combinations of the detection signal of and the detection signal of film sensitivity,
A combination of signals that are not actually used may be selected to provide a special function not included in the specifications.

Note that the decoder does not need to be a dedicated decoder, and a microcomputer or the like built into the camera for other purposes may be used for decoding. In addition to the above-mentioned bulb operation, special operations that are not included in the camera specifications include setting a snapshot mode for efficient camera durability testing, and special test modes such as autofocus camera settings. If available, you may input distance information and set a mode for testing the amount of lens extension.

(Effects) According to the present invention, there is provided a reading section for reading a film information signal from part or all of a film information recording section encoded and provided in a film magazine, and a reading section for decoding the reading signal of this reading section to record a film. A function to provide a camera with a special function not included in the final specifications of the camera by giving specific information from among the film information determined by the decoder in a camera equipped with a decoder for determining information. To provide a camera equipped with a film information reading device that allows the camera to perform operations that are not in the final specifications of the camera without adding any mechanical or electrical components to the camera. can do.

[Brief explanation of the drawing]

Fig. 2 is a plan view showing an example of a film sensitivity information recording section provided in a film magazine, Fig. 2 is a circuit diagram showing one embodiment of the present invention, and Fig. 3 is a circuit diagram showing another embodiment of the invention. It is a diagram. 20...Film magazine 21...Film information recording section Sl, S2, S3, S4, S5, S6, S7, S8
, S9, SIO...Contact point 22 as film information reading section...Decoder agent Kabayama 2h■, () Qgu

Claims (1)

[Claims] A reading section for reading a film information signal from part or all of a film information recording section encoded and provided in a film magazine, and a decoder for decoding the read signal of this reading section and determining the film information. A film characterized in that it has a functional section that provides a special function that is not in the final specifications of the camera by being given specific information from among the film information determined by a decoder. Camera with information reading device.