JPS59102219A - Film rewinding device of camera - Google Patents

Abstract

PURPOSE:To simplify the constitution and also to execute easily the operation by constituting so that a rewinding lever turns automatically and attains a raised state with a rise of a supporting member, by releasing a detainment of the other end of the lever. CONSTITUTION:A lever supporting member 10 on which one end of a rewinding lever 7 is attached pivotally so as to be rotatable to the upper end part is supported so as to be movable up and down in a through-hole 6b of a rewinding knob 6, and energizing force in the upper direction is always applied to the lever supporting member 10 by a plate spring 11 provided in the rewinding knob 6. When photographing is ended and a film rewinding operation is executed, it is executed by inserting a pawl, etc. into a gap between the tip of the rewinding lever 7 and an engaging groove 8a of a film sensitivity display dial 8, and pushing up the rewinding lever 7. As a result, a click spring 16 is detached from a detaining groove 15a of a knob 15, therefore, the lever supporting member 10 rises by energizing force of the plate spring 11, following which the rewinding lever 7 is turned toward the upper direction of a camera body, and becomes a raised state.

Description

[Detailed description of the invention] The present invention relates to a film rewinding device for a camera.

In general, a camera's film rewind device consists of a rewind knob that is rotatably supported coaxially with the rewind shaft at the top or bottom of the camera body, and a film rewind knob that is rotatably supported on the same axis as the rewind shaft at the top or bottom of the camera body, and a film that has one end pivotally attached to a part of the outer periphery of this knob. The rewind lever is normally pushed down and accommodated in a groove provided at the upper part of the knob, and the rewind lever is configured to be pulled up and rotated during a rewind operation. Then, by rotating the rewind lever, the rewind knob is rotated on the rewind shaft, and the rotation is transmitted, thereby making it possible to rewind the film.

By the way, a problem with this type of film rewind device is that if the rewind knob with the rewind lever is provided protruding from the camera body,
Although it is easy to pull up the rewind lever, the entire camera body is exposed to the outside, which not only obstructs the simple design of the camera body exterior, but also poses a risk of erroneous operation. ), the structure had to be configured so that rotational transmission with the rewinding shaft was always disconnected.

On the other hand, there are cameras in which the rewind lever and rewind knob are buried inside the exterior of the camera body, but in this case, it is troublesome to operate the rewind lever, and it is difficult to load and wind the film. In order to facilitate the operation, it is necessary to connect and disconnect from the rewinding shaft in the same way as described above, and there is a problem that the configuration becomes complicated.

The present invention was made in view of these circumstances, and
One end of a film rewind lever is pivotally attached to the upper end of a lever support member that is supported so as to be movable up and down within a rewind knob and is constantly biased upward, and the other end of this rewind lever is pushed down. Despite the simple structure, by configuring the rewind lever so that it can be locked on the rewind knob side when the rewind lever is in a state of The camera can be rotated and placed in a raised state, which provides excellent operability, and the rewind knob and rewind lever are buried within the camera body exterior to provide a simple exterior design. To provide a frame rewinding device for a camera which is capable of rewinding the image and which is inexpensive in terms of cost.

Hereinafter, the present invention will be explained in detail using embodiments shown in the drawings.

FIGS. 1(a) and 1(b) show an embodiment of a camera employing a film rewinding device according to the present invention. In these figures, reference numeral 1 indicates the main body of the camera body, 2 indicates the upper cover thereof, 3 is a detachable back cover, which constitutes a camera 4. Further, a finder 5a is provided at the center of the upper part of the camera 4, and on the right side of the finder 5a, a conventionally well-known film winding lever 5I3, a chanterelle release 5C, and a film frame number display window 5d are arranged. A winding mechanism and various other well-known devices are built-in.

On the other hand, on the upper left side of the camera 4, there is a rewind knob 6 constituting a film rewind mechanism and a film rewind knob (-7) with one end pivotally attached to the outer periphery of the knob 6, A film sensitivity display dial 8 is disposed coaxially and rotatably.

The film sensitivity display dial 8, as shown in FIG. An engagement groove 8a is provided, and film sensitivity values displayed at predetermined intervals on the circumferential surface are displayed on the upper cover 2.
A film sensitivity display window 2a formed on the back side of the screen allows for visual recognition from the outside. The film sensitivity display dial 8 is built into the exterior of the camera 4 along with the film rewind lever 7 so that its upper portion is exposed. Here, 7a and 8b in the figure
is a protrusion slightly protruding from the top of the other end of the film rewinding lever 7 and the upper part of the outer periphery of the film sensitivity display dial 8 opposite thereto; these protrusions 7a, 13
b The film sensitivity display dial 8 is configured to be rotatable from the outside. In addition, 7b in the figure is a window formed in the center of the film rewinding lever 7, and this window 7b allows a display slit 9a formed in the head of a film rewinding shaft 90, which will be described later, to be visually recognized from the outside. By doing so, the film winding state can be confirmed.

Now, the specific structure of the film rewinding device according to the present invention will be explained in detail with reference to FIG. 2 and subsequent figures.

That is, the rewinding knob 6 rotatably supported on the head side of the rewinding shaft 9 is formed as a whole into an inverted cylindrical shape with a bottom.
It has a groove 6a on its top that accommodates the rewind lever 7, one end of the groove 6a is a part of the outer periphery of the rewind knob 6 and communicates with the through hole 6b, and the other end is open on the side of the knob. has been done. In the through hole 6b, a lever support member 10 having one end of the rewind lever T rotatably pivoted to the upper end thereof is supported so as to be movable up and down. A leaf spring 11 provided within the knob 6 constantly applies a biasing force to the upper blade. Further, at the lower end of this lever support member 10, a plurality of protrusions 1 are provided that protrude from the outer periphery of the head of the rewinding shaft 9 during film rewinding.
The claw portion 13 & that engages with the locking groove 12b formed between 2 &
A pawl lever 13 is rotatably supported, and this pawl lever 13 is biased counterclockwise in FIG. 3 by a coil spring 14.

Here, the lever support member 10 described above has a protrusion 10a that protrudes toward the center of the knob at its lower end side.

10b is configured to be in contact with the leaf spring 11, and these projections 10a, 10b are locked by a locking step (not shown) formed inside the knob 6, thereby increasing the amount of upward movement. is regulated. Further, the outer peripheral portion of the rewinding knob 6 corresponding to the through hole 6b is cut out from below, and the upper side of this notched groove 6C extends from the pivoting portion of the rewinding lever 7 in the extending direction of the lever. It is configured to form a locking stepped portion 6d that locks a locking protrusion 7C protruding from the opposite side. That is, during the rewind operation, the rewind lever 7 is pulled up above the camera body and is supported by the support protrusion 6e provided on the upper part of the rewind knob 6, as shown in FIG. , as shown in FIG. 4, the groove 6a of the knob 6 is normally pushed down
It is said to be housed inside. When performing this push-down operation, the locking protrusion 7C is locked to the locking step 6d on the knob 6 side, and the lever support member 1
It is necessary to lower 0.

Further, reference numeral 15 in the figure is a rewinding knob provided at the tip of the rewinding lever 7, and this knob 15 is connected to the groove 88 of the film sensitivity display dial 8 when the lever 7 is pushed down. The return knob 6 is accommodated in a space formed by the outer periphery of the return knob 6. The click spring 16, which is protruded into the slot 6f of the knob 6 opening into the housing space, is locked in the locking groove 15a formed around the knob 15, so that the rewinding lever 7 is activated. It is held in the state shown in FIG.

A bottom plate 17 is screwed to the bottom of the film sensitivity display dial 8 with the rewind shaft 9 passing through it, and a retaining bin 18 protruding from the bottom surface of the bottom plate 17 is attached to the camera body. A bearing 19a, 1 is attached to the boss portion 1a on the 1 side.
The film sensitivity switching plate 20 is engaged with the hole 20a of the film sensitivity switching plate 20 rotatably supported via the dial 9b, so that when the dial 8 is rotated, the switching plate 20 can also be rotated. A pair of switch contact pieces 21a and 21b are provided on the lower side of the switching plate 20, and slide on a printed circuit board 22 disposed below the switch plate 20 to send out a signal corresponding to a desired film sensitivity value. is configured to do so.

Further, in the figure, reference numeral 23 indicates an upper base plate provided on the upper part of the camera body main body 1 and on which the printed circuit board 22 is placed, and 24 indicates a film cartridge connected to the lower part of the rewind shaft 9 and formed inside the camera body main body 1. The cartridge connecting member 25 facing the chamber 1b is a centering ring of the film sensitivity switching plate 20. Further, in FIG. 2, reference numeral 26 denotes a clink lever rotatably supported on the upper plate 23 and biased clockwise in the figure by a spring 21, and a click pin 26a at the tip thereof is attached to the film sensitivity switching lever. By engaging with a plurality of click grooves 20b formed on the outer peripheral edge of the film sensitivity display dial 20, the rotation operation of the film sensitivity display dial 8 can be controlled.

In such a configuration, the film rewind lever 7 is
Normally, as shown in FIG. 4, it is pushed down toward the camera 4 side and accommodated in the rewinding knob 6, and the locking protrusion 7C on the pivot side is engaged with the locking stepped portion 6d of the rewinding knob 6. At the same time, the knob 15 on the free end side is fitted into and engaged with the retaining groove 8a of the film sensitivity display dial 8, and the click spring 16 is further retained in the retaining groove 15a. It is held in a stopped state. In the locked state, the film speed display dial 8 is built into the camera 4 together with the film rewind lever 7 with its upper part exposed, and the protrusion 8b of the film speed display dial 8 and the film Projection 7a of rewind lever 7
and is only slightly protruding upward.

Therefore, this configuration has the advantage that the upper surface of the camera 4 can be made flat and the body exterior can be designed with a simple design, thereby improving the degree of freedom in design. In addition, when switching the film sensitivity display dial 8 according to the film sensitivity to be used, pinch the protrusion 8b of the film sensitivity display dial 8 and the protrusion 7a of the film rewind lever 7 with your fingers and rotate. By doing so, the switching operation can be performed easily and reliably. By rotating the dial 8 in this way, the film sensitivity switching plate 20, which is interlocked with the bin 18, is rotated, and the circuit on the printed circuit board 22 is switched to change the desired film sensitivity to the controller side. At the same time, the engagement between the click groove 20b on the outer periphery of the switching plate 20 and the clink lever 26 gives a click feeling to the rotation operation of the dial 8, and the dial 8 can be locked at a desired position.

Here, when the rewinding lever 7 is pushed down as described above, the lever support member 10 is lowered and thereby the claw portion 13a of the claw lever 13 and the locking groove 12b of the rewinding shaft 9 are disengaged. When in a bonded state, the connection between the two is severed.

Therefore, the rewinding shaft 9 does not rotate during the above-described film sensitivity switching operation, and furthermore, the rewinding shaft 9 can freely rotate during the film winding operation.

Now, the film rewinding operation when shooting is completed is as follows.

That is, it is preferable to insert a nail or the like into the gap between the tip of the film rewind lever 7 in the state shown in FIG. 4 and the retaining groove 8a of the film sensitivity display dial 8, and push the rewind lever 7 up. .

When the rewinding lever 7 is pushed up, the click spring 16 is disengaged from the locking groove 15a of the knob 15 at the tip thereof, and as a result, the lever support member 10, which is constantly biased by the leaf spring 11, rises. Become. Then, as the lever support member 10 rises, the pivot portion of the film rewind lever γ also rises, and this rewind lever 7
The locking protrusion 7C of the rewind lever 7 is not rotated in the direction in which it is disengaged from the locking step 6d of the rewind knob 6, that is, in the counterclockwise direction in FIGS. 5(a) and (b). is rotated toward the upper side of the camera body, and is in the raised state shown in FIG. 3 or FIG. 5(C). That is, the film rewinding lever 7 changes from the state shown in FIG. 4 to the state shown in FIG. 5(a).
, and is automatically rotated through the state shown in FIG. 5(b) to the raised state shown in FIG. 3 or FIG. 5(c), and is in a state in which rewinding operation can be performed.

What should be noted here is that even if the film rewind lever 7 mentioned above is in the raised state, there are two ways in which the pawl lever 13 can be held with respect to the rewind shaft 9.
This is shown in FIGS. 3 and 5(c). That is, the pawl lever 13 is urged counterclockwise in the figure by the coil spring 14, and rises as the lever support member 10 rises.

When the pawl portion 13a of the pawl lever 13 is in a position where it can engage with one of the locking grooves 12b of the rewinding shaft 9, the two are engaged as shown in FIG. 5(c) and FIG. 6(a). When the film rewind lever 7 is rotated, the rewind shaft 9 rotates together with the rewind knob 6, and the rewind operation can be performed immediately. However, when the claw portion 13a of the claw lever 13 is in a position corresponding to one of the protrusions 12a of the rewinding shaft 9, the claw portion 13a is locked to the lower end of the protrusion 12a, and as shown in FIGS. ). In such a case, it is preferable to rotate the rewinding lever 7 in the rewinding direction to a position where the claw portion 13a of the claw lever 13 can engage with the locking groove 12b of the rewinding shaft 9. Then, the pawl lever 13 is rotated by the biasing force of the coil spring 14, and its pawl portion 13a engages with the locking groove 12b, and as a result, the film rewind operation is performed as in the case described above. It can be done.

On the other hand, when the film rewind operation is completed, the fifth
In the state shown in Figure (C>), it is best to rotate the film rewind lever 7 by pressing the tip of the film rewind lever 7 downward from the body, that is, clockwise in the figure. The protrusion 7C is the locking step 6d of the rewinding knob 6.
By entering the lower side and being locked, the lever support member 10 moves down against the biasing force of the plate spring 11 using this locked part as a point of action, and moves from FIG. 5(b) to FIG. 5(a). >The state shown in FIG. 4 is reached, and at this time, the click spring 16 is engaged in the locking groove 15a formed in the knob 15 of the rewind lever 7, and the locked state is maintained. Become.

Therefore, according to the film rewinding device having such a configuration, the film rewinding lever 7 is simply pulled up and the film is automatically rewinded, and the operation can be performed easily and reliably, improving operability. It has the advantage of being superior.

It goes without saying that the present invention is not limited to the structure of the embodiments described above, and that the shape, structure, etc. of each part can be modified and changed as necessary. For example, if the knob 15 of the film rewind lever 7 is configured as a locking means for locking on the rewind knob 6 side and can be easily released from the outside, the rewind lever 7 can be pulled with a nail or the like. This eliminates the need to raise the device, further improving operability.

Further, in the above embodiment, the knob 15 of the rewind lever I is fitted into the groove Ba of the film sensitivity display dial 8, but the knob 15 of the rewind lever I is not limited to this, and the knob 15 is fitted into the groove Ba of the camera body or the rewind knob. It may also be fitted into a groove.

As described above, according to the present invention, the film rewind lever is pivotally mounted to the upper end of the lever support member that is supported in a vertically movable manner within the rewind knob and is constantly biased upward, and The other end of the rewind knob can be locked by a locking means that can be easily attached and detached on the rewind knob side, so despite the simple structure, it is easy to lock the rewind knob during the rewind operation. Simply by releasing the rewind lever, the rewind lever is automatically rotated as the support member rises and becomes the raised state, greatly improving its operability. By embedding the knob inside the exterior of the camera body, it is possible to improve the degree of freedom by creating a non-pull design as a whole, and by cleverly utilizing the lever support member mentioned above, it is also easy to connect and disconnect from the rewind shaft. It has various excellent effects such as being easy to carry out and being inexpensive.

[Brief explanation of the drawing]

・-The figure shows an embodiment of the film rewinding device for the camera according to the present invention. FIGS. 2 is an exploded perspective view showing the film rewinding device which is the main part of the present invention, FIG. 3 is an enlarged sectional view of the main part showing the assembled state, and FIGS. 4 and 5 (a> (b )(c) is a cross-sectional view of the track to explain its operating state, and FIG. 6(a)
(b) is a bottom view illustrating the connection state between the film rewind lever and the rewind shaft. 1...Camera body main body, 2...Top cover,
4. ...Camera, 6..Rewind knob, 6d
...Lock step, 7...Film rewind lever,
7a... Protrusion, IC... Locking protrusion, 8...
... Film sensitivity display dial, 8a ... Engagement groove, 8b ... Protrusion, 9 ... Rewind shaft,
10... Lever support member, 11... Leaf spring, 1
2b...Latching groove, 13...Claw lever, 13a...
...Claw portion, 14...Coil spring, 15...Holder, 15a...Latching groove, 16...Click spring, 17...Bottom plate, 18...・Engagement pin,
20...Film sensitivity switching board. Figure 5 (b) Figure 6 (Q) Figure 6 (b) Procedural amendment export) 1. Indication of the case 1982 Patent Application No. 212180 2. Name of the invention Camera film rewinding device 3 , person who makes corrections

Claims (1)

[Claims] A rewinding knob rotatably supported on a film rewinding shaft; a lever support member supported vertically movably within the rewinding knob and constantly being biased upward; A film rewinding lever is provided, one end of which is rotatably pivotally attached to the upper end, and the other end of which is locked on the rewinding knob side when pushed down, and the lever is released from the locked state. The film rewinding device for a camera is characterized in that the film rewinding lever rotates upwardly of the camera body as the lever support member rises, and is in a raised state.