JP3160126B2 - Camera body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera body structure.

[0002]

2. Description of the Related Art As a conventional camera body, for example, as shown in FIGS. 4 and 5, an aperture surface 100a, a spool chamber 100b, a patrone chamber 100c, and a bottom portion 10 are provided.
In some cases, the camera body 100 is formed by integrally molding Od with resin.

[0003] The camera body having this configuration is used to remove the mold during molding, and as shown in FIG.
The bottom portion 10 is arranged so as to secure the positions of various members constituting the camera such as the AF unit 20 disposed on the lower surface of the camera.
It is necessary to set 0d, which causes a problem that the bottom of the camera becomes large.

In view of the above, a camera body has been proposed in which a bottom plate integrally formed of resin is fixed to the camera body so as to cover the lower portion of the camera body from the lower surface of the spool chamber to the lower surface of the patrone chamber by using the bottom portion of the camera body as a separate member. Was done.

[0005]

However, in the conventional example in which the bottom surface is formed of a separate base plate, the bottom plate is formed as a long plate-shaped base plate from the lower surface of the spool chamber to the lower surface of the patrone chamber. As shown in FIG.
Large warpage (deformation) is likely to occur as a whole due to shrinkage during molding, and if the shaft of the transmission gear train such as film feed is integrally formed, the warp will cause the shaft to tilt, causing problems with gear meshing If a tripod screw or the like is attached to this ground plate, there is a problem that the ground plate bends due to the static pressure of the tripod screw fixing portion, and the meshing of gears and the like near the tripod screw portion changes.

An object of the present invention is to solve such a conventional problem and to provide a camera body which does not cause deformation.

[0007]

Means for Solving the Problems The invention recited in claim 1, aperture, film take-up chamber, and a camera body in which the film loading chamber is integrally formed of plastic, the camera body and is
Separately, it is integrally molded with resin and holds a gear train that transmits driving force from the film winding chamber to the film loading chamber.
From the film winding chamber to the film loading chamber
A camera body having a long substantially rectangular plate-shaped lower surface base plate, wherein the lower surface base plate is provided with the film winding chamber.
And approximately the center between the area corresponding to the film loading chamber and
The substantially lower side of the bottom plate, and the gear
At least two of the gear shafts in the row
A metal plate having a size extending in the long side direction so as to hold the shaft is insert-molded.
The invention described in claim 2 in the invention according to claim 1, wherein the lower surface ground plane motor is fixed, the metal-flop
Gears including gears respectively supported on two axes of the rate
Transmitting the driving force of the motor to the loading chamber via a row
It is characterized and Turkey. The invention as set forth in claim 3 in the invention according to claim 1 or 2, the metal plate which is inserted into the lower surface base plate, the metal-flop
Between the two longitudinally spaced axes held by the rate
A tripod screw portion is provided .

[0008]

1 and 2 show an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a camera body integrally formed of plastic, which comprises a spool chamber 1a for winding a film, a cartridge chamber 1b, and an aperture surface 1c for exposing the film. Reference numeral 2 denotes a mirror box having a mirror (not shown) and a mechanism for driving the mirror. Reference numeral 3 denotes a shutter unit, which is fixed to the rear side of the mirror box 2. 4
Is a plastic ground plate that covers substantially the entire lower surface of the camera body 1, and is fixed to the body 1 and the mirror box 2 with screws or the like.

Here, the detailed shape of the base plate 4 will be described with reference to FIG.

The base plate 4 is integrally formed from the lower side of the spool chamber of the camera to the lower side of the patrone chamber. An inner gear is formed at a lower portion 4a of the spool chamber, and an outer periphery of the inner gear 4a is formed. The portion has a sliding surface 4b for rotatably supporting a spool 12, which will be described later. A metal plate 5 insert-molded on the ground plate 4 is provided substantially near the center of the ground plate 4, and the metal plate 5 straddles a tripod screw 5a and a tripod screw 5a as shown in FIG. And shaft portions 5b and 5c for rotatably supporting the gear. The metal plate 5 is inserted so as to substantially separate the side of the main plate 4 from the patrone chamber and the spool chamber.

Reference numeral 6 denotes a motor serving as a driving source, which is fixed to the main plate 4. Reference numeral 7 denotes a pinion gear fixed to the output shaft of the motor 6, and reference numeral 8 denotes three planetary gears revolving between the pinion gear 7 and the internal gear 4a. Reference numeral 9 denotes a carrier that rotates by the revolution of the planetary gear, and reference numeral 10 denotes a cover, which has a bearing portion 10a fixed to the main plate 4 and rotatably supporting the shaft of the carrier 9.

An output gear 11 is fixed to the shaft of the carrier 9 and transmits the revolution of the planetary gear 8. Reference numeral 12 denotes a spool for winding the film, the upper end of which is rotatably supported on the upper surface side of the camera body, and further has a gear portion 12a on the outer peripheral portion of the lower end. It has an inner peripheral surface 12b that is rotatably supported. Reference numeral 13 denotes a fork gear for rewinding the film. Reference numeral 14 denotes a gear train having a planetary gear clutch, which meshes and transmits rotation of the motor 6 in one direction to a gear portion 12a of the spool 12, and transmits rotation in the other direction to the fork gear. The film is transmitted to the gear 13 and rewound. Reference numeral 15 denotes a cover for holding the gear, and a bottom cover 16 having an appearance is attached to the outside of the cover.

[0013]

As described in the foregoing, the invention as set forth in claim 1, aperture, and the camera body film take-up chamber, the film loading chamber is integrally formed of plastic, the camera present
In order to hold a gear train for transmitting a driving force from the film winding chamber to the film loading chamber, the film winding chamber is formed integrally with resin separately from the body.
A camera body having a long and substantially rectangular plate-shaped lower surface base plate leading to Hama chamber, the lower surface base plate, said film
Nearly between the winding chamber and the portion corresponding to the film loading chamber.
At the center, over the substantially short side direction of the bottom plate,
At least one of the gear shafts of the gear train that is separated in the long side direction
Since a metal plate having a size extending in the long side direction is formed by insert molding so as to hold two shafts, deformation due to shrinkage during molding can be suppressed, and a lower surface base plate having a function of holding a gear train can be formed. Even if it is integrally formed of resin as a member separate from the camera body, no problem occurs in gear engagement.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of FIG.

3A and 3B show the ground plate of FIG. 1, wherein FIG. 3A is a plan view and FIG. 3B is a plan view of a metal plate.

FIG. 4 is a perspective view of a conventional camera body.

FIG. 5 is a sectional view of FIG. 4;

FIG. 6 is a side view showing a main plate of another conventional camera body.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Body 2 ... Mirror box 3 ... Shutter unit 4 ... Ground plate 5 ... Metal plate 6 ... Motor 7 ... Pinion gear 8 ... Planetary gear 9 ... Carrier 10 ... Cover 11 ... Output gear 12 ... Spool 13 ... Fork gear 14 ... Gear train 15 …cover

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-25725 (JP, A) JP-A-61-90145 (JP, A) JP-A-62-63925 (JP, A) JP-A 57-90 92327 (JP, A) JP-A-1-283536 (JP, A) JP-A-62-163030 (JP, A) JP-A-63-57633 (JP, U) JP-A-63-96544 (JP, U)

Claims (3)

(57) [Claims] 1. A aperture, film take-up chamber, and a camera body in which the film loading chamber is integrally molded with resin, the turtle
In order to hold a gear train for transmitting a driving force from the film winding chamber to the film loading chamber, the film is formed integrally with the resin separately from the film main body.
A camera body having a long, substantially rectangular, plate-shaped lower base plate leading to a film loading chamber , wherein the lower base plate includes the film winding chamber and the film loader.
At the substantially central portion between the portions corresponding to the filling chambers,
Of the gear shaft of the gear train.
Enough to hold at least two axes separated in the long side direction
A camera body characterized in that a metal plate having a size extending in the long side direction is insert-molded. 2. A motor is fixed to the lower surface base plate, before
Gears supported on two shafts of the metal plate
The camera body according to claim 1, wherein the benzalkonium to transmit the driving force of the motor to said loading chamber through the gear train including. 3. The metal plate inserted into the lower surface base plate has a long side held by the metal plate.
A tripod screw is provided between two shafts that are
The camera body according to claim 1 or 2, characterized in that that.