JPH036896Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a film information reading device for a camera that reads information from a film information display section provided on the surface of a cartridge that indicates the sensitivity of the film.

[Conventional technology]

As shown in FIG. 4, a cartridge used in a camera has a film wound therein, and conductive conductive material such as copper foil is arranged in a lattice pattern on the circumferential surface of the cartridge 1, as shown in FIG. A film information display section 3 is provided to indicate the sensitivity of the camera. By attaching this cartridge 1 to the cartridge chamber of the camera, the film information reading device installed in the camera automatically reads information from the film information display section 3 and automatically adjusts the sensitivity of the camera body. I'm starting to do it more and more.

Conventionally, a film information reading device for a camera that reads information from the film information display section 3 of the cartridge 1 has been installed in the cartridge chamber 5 of the camera 4 into which the cartridge 1 is inserted and stored, as shown in FIG.
In addition, as shown in FIG. The device has a protruding spring contact piece 7 that is elastic in the radial direction and comes into contact with the film information display section 3, and as shown in FIG. There is an apparatus in which the contactor 8 at the other end is brought into contact with the film information display section 3 when the contactor 8 is pressed.

However, in such a device, when inserting the cartridge 1 into the cartridge chamber 5, each reading section (pin contact 6, spring contact piece 7, contact 8) is inserted into the cartridge 1.
Although it is easily driven in the insertion direction A and rotational direction B, the following is poor in the axial direction of the cartridge 1. Therefore, when the cartridge 1 moves in the axial direction, the reading section 3 displays the information on the film information display section 3. This may cause damage and cause the film information to be transmitted incorrectly or become unreadable.

Also, do not expose the cartridge 1 from below or diagonally to the camera 4.
When installing by moving it in the direction of its axis,
The end of the cartridge 1 may get caught on the reading section and damage the reading section.

Therefore, as shown in FIG.
There is a device that is provided with a wire contact 9 that extends from the inner wall 5a of the cartridge 1 in the axial direction of the cartridge 1 and has elasticity in the axial direction. had poor followability.

(Problems to be solved by the invention) In the conventional film information reading device, when the cartridge is attached to the cartridge chamber, the reading section may damage the film information display section, resulting in incorrect transmission of film information or the inability to read the film information. wake up, and
There was a problem that the end of the cartridge came into contact with the reading section, damaging the reading section and rendering it inoperable.

In addition, since the conventional reading section came into contact with the film information display section of the cartridge at one point, the one point on the film information display section that the reading section comes into contact with may be damaged or dirty. This tends to cause mistransmission or unreadability of film information.

The present invention has been devised in view of the above-mentioned points, and an object of the present invention is to provide a film information reading device that can reliably read film information from a film information display section.

[Means for solving problems]

The present invention is a film information reading device that reads film information from a film information display section 3 provided on the surface of a cartridge 1, in which the film information display section 3 of the cartridge 1 is brought into contact with the cartridge chamber 13 that houses the cartridge 1. A conductive reading section 29 formed in the shape of a coil spring.
is stretched in the tangential direction of the cartridge 1.

[Effect]

The present invention is such that the reading section follows the cartridge due to its spring characteristics even when the cartridge is inserted into the cartridge chamber from any direction and is positioned and moved after insertion.

〔Example〕

Next, the configuration of an embodiment of the present invention will be described with reference to the drawings.

In FIGS. 1 to 3, reference numeral 11 denotes a camera body, and a back cover 12 is closed on the back side of the camera body 11 so that it can be opened and closed. The camera body 11 is located between the cartridge chamber 13 and the film winding section 14, a cartridge chamber 13 for storing the cartridge 1, a film winding section 14 for winding the film 2 pulled out from the cartridge 1 every time a photograph is taken. A film photosensitive section 16 is provided which faces a lens (not shown) attached to the front surface of the camera with a shutter 15 interposed therebetween.

The cartridge chamber 13 is constituted by a cartridge storage frame 17 that opens on the back side of the camera body 11 and is provided to have almost the same external shape as the cartridge 1.
It is formed from a cylindrical inner wall part 18 having a semi-cylindrical shape that matches the outer peripheral surface shape of the camera body 11, and inner wall parts 19 and 20 that are linearly provided from both sides of this cylindrical inner wall part 18 toward the back of the camera body 11. ing.

One inner wall portion 19 of this patrone storage frame 17
is provided with a cartridge pressing spring 21 whose one end is screwed to its inner wall 19 and whose other end elastically protrudes into the cartridge chamber 13. The cartridge 1 is urged toward the other inner wall portion 20 and the cylindrical inner wall portion 18 side.

Further, a position close to the other inner wall 20 of the cylindrical inner wall 18, that is, a position facing the film information display section 3 of the cartridge 1 housed in the cartridge chamber 13, is located in the axial direction C of the cartridge 1 (see FIG. 1). A long window hole 22 is formed in the opening (see), and a film information reading device 23 is provided in this window hole 22.

This film information reading device 23 has a holding plate 24 whose both side edges are fixed to both side edges of the window hole 22 of the cartridge storage frame 17. An escape groove 25 is provided in the cylindrical inner wall portion 18 of the cartridge storage frame 17 to receive a coil contact 29 which will be described later. In addition, this retaining plate 24
A support shaft 26 that protrudes in the direction of the cartridge chamber 13 is provided on one end (on the other inner wall 20 side) facing the cartridge chamber 13, and on the other end (on the cylindrical inner wall 18 side). A contact piece holding portion 28 having a contact piece holding groove 27 is provided at a position horizontal to the support shaft 26, and the support shaft 26 and the holding groove 27, which form a pair in the horizontal direction, are used to hold the cartridge stored in the cartridge chamber 13. A plurality of them are provided on the holding plate 24 in accordance with the position of the film information display section 3 in the axial direction C.

The support shaft 26 and the holding groove 2 of each set of this holding plate 24
7 and is inserted into the cartridge chamber 13 from the holding groove 27.
Between contact pieces 30 which protrude to the side and will be described later, coil contacts 29 formed in the shape of a coil spring and having conductivity are stretched along the tangential direction B of the cartridge 1 as a reading part of the film information display part 3. It is set up. Each of the coil contacts 29 is arranged in accordance with the axial position of the film information display section 3 of the cartridge 1 housed in the cartridge chamber 13, and as shown in FIG.
Before the cartridge 1 is stored in the cartridge chamber 13, it projects into the cartridge chamber 13 through the window hole 22.

Further, one end portion 30a of a conductive contact piece 30 is inserted into each holding groove 27 of the holding plate 24, and each one end portion 30a protrudes from each holding groove 27 toward the cartridge chamber 13 to One end of each coil contact 29 is hooked and electrically connected to that coil contact 29. The other end 30b of each contact piece 30 is connected to a pattern wiring 3 of the shutter electric circuit provided on the side surface of the shutter base plate 31.
2 and is electrically connected.

Further, a protrusion 33 is provided on the surface of the cylindrical inner wall portion 18 of the cartridge storage frame 17, with which the circumferential surface of the cartridge 1 comes into contact, and the back cover 12
An elastic body 34 is provided to elastically abut the circumferential surface of the cartridge 1 and hold the cartridge 1 within the cartridge chamber 13 when the cartridge is closed. Furthermore,
Above this patrone chamber 13 is a camera body 1.
A rewinding shaft 35 that engages with the cartridge shaft of the cartridge 1 projects from the cartridge 1, and a shaft groove 36 that rotatably fits the cartridge shaft of the cartridge 1 is provided on the bottom surface of the cartridge chamber 13.

Then, to attach the cartridge 1 to the camera body 11, open the back cover 12 and move the cartridge 1 to the cartridge chamber 1 with the rewind shaft 35 retracted upward.
After positioning the cartridge 1 in the cartridge chamber 13 by inserting it horizontally into the cartridge 1
The film 2 extracted from the film 2 is guided to the winding section 14 side, and the back cover 12 is closed.

When the cartridge 1 is stored in the cartridge chamber 13, as shown in FIG. The elastic body 34 urges the inner wall 20 and the cylindrical inner wall 18 side.

Further, when the cartridge 1 is stored in the cartridge chamber 13, the film information display section 3 of the cartridge 1 comes into contact with each coil contact 29 to establish a conductive connection, and the coil contact 29 is pressed by the cartridge 1. and escapes into the relief groove 25 of the holding plate 24. In this conductive contact state, the coil contact 29 easily contacts the arcuate circumferential surface of the cartridge 1 due to the characteristics of the spring, and
The film information display section 3 is contacted at multiple points on the coil section.

Note that when inserting the cartridge 1 into the cartridge chamber 13 and positioning it, the cartridge 1 is inserted in the insertion direction A.
Even if the cartridge 1 is pushed or rotated in the tangential direction B, the coil contact 29 has elasticity in the insertion direction A and the tangential direction B, and each point in contact with the cartridge 1 has an arcuate surface with a circular cross section. Therefore, the film information display section 3 is not damaged by the coil contact 29.

Incidentally, in the above embodiment, the case of the camera was explained in which the cartridge 1 was inserted horizontally into the cartridge chamber 13 from the insertion direction A.
For example, in the case of a small camera, the camera body 11
The cartridge 1 is inserted from the bottom surface or diagonally from below, but in this case, even if the end of the cartridge 1 comes into contact with the coil contact 29 due to insertion from the axial direction C. , since the outside of the coil contact 29 is a large circular arc surface in the axial direction C, the coil contact 29 easily escapes into the relief groove 25 of the holding plate 24, and the coil contact 29
9 will not be damaged, and the film information display section 3 will not be damaged.

[Effect of idea]

According to the present invention, since the reading member formed in the shape of a coil spring is stretched in the tangential direction of the cartridge, the reading part remains attached to the cartridge even when the cartridge is inserted into the cartridge chamber from any direction and positioned after insertion. On the other hand, since it is driven by spring characteristics, it is possible to prevent the film information display section of the cartridge from being damaged by the reading section and the reading section from being damaged by the cartridge.
Due to the characteristics of the spring, this reading section can easily contact the circumferential surface of the cartridge, and also contacts the film information display section at multiple points, so that the film information on the cartridge can be displayed without causing erroneous transmission or unreadability of the film information. The film information can be reliably read from the section.

[Brief explanation of drawings]

Fig. 1 is a rear view of a camera showing an embodiment of the device of the present invention, Fig. 2 is an enlarged cross-sectional view of the main parts thereof, and Fig. 3 is an enlarged cross-sectional view of the main parts with the cartridge attached. , Figure 4 is a perspective view of the patrone, Figure 5 is a perspective view of the cartridge.
7 to 7 are cross-sectional views of essential parts of a camera showing conventional devices, and FIG. 8 is a rear view of the camera showing still another conventional device. 1...Patrone, 3...Film information display section, 13...Patrone room, 29...Reading section.

Claims (1)

[Claim for Utility Model Registration] In a film information reading device that reads film information from a film information display section provided on the surface of a cartridge, a coil that contacts the film information display section of the cartridge is placed in a cartridge chamber that stores the cartridge. A film information reading device characterized in that a spring-shaped conductive reading section is stretched in a tangential direction of the cartridge.