JPH0442825Y2 - - Google Patents

Description

[Detailed description of the invention] This invention is an improvement to the camera winding device in which power is transmitted to the spool to wind the film. It makes it possible.

Conventionally, spool-winding cameras that can be operated with or without film are known, but the reliability and reliability of operation is improved by linking motor control during automatic operation to operations such as shutter charge operation and sprocket rotation. This is something that can further enhance your sexuality. That is, a set lever is provided in connection with the slide lever for setting the shutter, a charge lever in connection with the shutter charge detection cam, a sprocket lever in connection with the sprocket cam, and the like.

Embodiments of the present invention shown in the drawings will be described in detail.

A spool (not shown) is rotated by the rotation of a spool gear 1 to wind up the film, and the spool gear 1 meshes with a stellar gear 2, and a swing arm 3
It also meshes with the planetary gear 4 supported by. The planetary gear 4 is provided with a clutch device so that the main gear 5 and the swinging arm 3 are oscillated to engage and disengage the planetary gear 4 in an interlocking manner.

The main gear 5 is a motor transmission system 6 from the motor.
The rotation is transmitted through the clutch device, and the rewinding shaft (not shown) also has a rewinding transmission system 7 through a similar clutch device as described above.

A ratchet gear 8 connected to the main gear 5
A shutter charge detection cam 9 and a set cam 10 connected thereto are provided coaxially with the shutter charge detection cam 9.

A locking pawl 11 is provided on the detection cam 9 and engages with and disengages from the ratchet gear 8. Further, the charge lever 12 that comes into contact with the locking pawl 11 engages with and disengages from the cam surface 9' of the detection cam 9. Furthermore, the cam surface of the set cam 10 is brought into contact with a set lever 19 of a shutter that engages with and disengages from a pin 14 of a slide lever 13, which will be described later. The charge lever 1
2 operates the cam switch SW ₁ and also engages with the slide lever 13, and the slide lever 13 has a locking lever 16 that locks the sprocket lever 15 and the slide lever 13.
etc. are provided in connection with the sprocket lever 15.
engages a sprocket cam 17 which is associated with a sprocket (not shown) and is also associated with a sprocket switch _SW2 . This sprocket switch _SW2 is also associated with a detection lever 18 for detecting the presence or absence of film F.

FIG. 1 shows the state at the completion of film winding and shutter setting, in which the charge lever 12 is located on the cam surface 9' of the detection cam 9, and therefore the locking claw 1
1 is pushed by the charge lever 12, which presses the spring 20 and the locking pawl 11 is separated from the ratchet gear 8. However, when the lever is ready for film winding, that is, preparation for photographing operation, the changeover switches S ₁ and S ₂ are connected to the winding side contact W (solid line in FIG. 3), as shown in FIG. 3.
Cam switch SW ₁ and sprocket switch SW ₂
are connected to contacts b and d. (Dotted line in Figure 3).

Therefore, when the shutter button for shooting operation is pressed, the release lever 21 moves to the left and the lock lever 1 moves to the left.
6 is removed from the slide lever 13, and the slide lever 13 moves to the left by the stored force of the spring 22, removing the charge lever 12 from the cam surface 9' and locking the locking claw 1.
1 are removed, the locking pawl 11 is engaged with the ratchet gear 8 by the spring 20, and the main gear 5, the detection cam 9, and the set cam 10 are connected. (See Figure 2) At the same time, the sprocket lever 15 comes off the cam surface 17' of the sprocket cam 17, and the pin 14
moves close to the set lever 19, and exposure is completed as is well known. Therefore, when the slide lever 13 is moved to the left, the cam switch is activated via the charge lever 12.
SW ₁ is moved to contact a side, and sprocket lever 1
5 to the left is separated from sprocket switch SW ₂ and switched from contact d to contact c. (3rd
(solid line in the figure) Therefore, the current of power supply B is the changeover switch S ₂
The circuit flows from W to B through motor M, sprocket switch _SW2 c, changeover switch _S1 W, and motor M rotates in the forward direction, that is, rotates the spool in the winding direction of film F. Note that when the film F is not loaded, the detection lever 18 detects that the sprocket lever 15 is moved away from the sprocket switch SW ₂ and is switched from the contact point d to the contact point c, and the spring is activated. With the accumulated force of 23, the lever 18 is moved to the contact point c of the sprocket switch SW ₂ .
This prevents switching to contact d and maintains the connection to contact d.
Therefore, the motor M performs the same forward rotation as before, such as B→S ₂ W→M→SW ₂ d→SW ₁ a→B, so even if film F is not loaded, the camera operation demonstration is the same as when it is loaded. is possible.

When all of the loaded film F has been photographed as described above, the changeover switches _S1 and _S2 are switched from the contact W to the rewind contact R, as is well known. (Dotted line in Figure 3)
Then, the current passes through the circuit B → S ₁ R → SW ₂ c → M → S ₂ R → B, and flows in the opposite direction to the forward rotation, so the motor M rotates in the reverse direction, that is, when the rewinding shaft is wound. The rewind gear 24 is rotated to rewind the film F wound onto the spool onto the rewind shaft side. In this way, in the present invention, the shutter charge detects this with the detection cam 9, stops the charging operation, performs the return operation with the release operation, and reliably controls the motor operation with the cam switch and the sprocket switch. Furthermore, even when no film is loaded, all settings and charges can be easily performed by the action of the two switches.

[Brief explanation of drawings]

The figures show an embodiment of the present invention; FIG. 1 is a perspective view of the main part, FIG. 2 is a partial plan view, and FIG. 3 is a circuit diagram showing an example of an electric circuit. Code: 5 is main gear, 8 is ratchet gear,
9 is a shutter charge end detection cam, 10 is a set cam, 11 is a locking pawl, 12 is a charge lever, 13 is a slide lever, 14 is a pin, 15 is a sprocket lever, 17 is a sprocket cam,
SW ₁ is a cam switch, SW ₂ is a sprocket switch.

Claims (1)

[Scope of utility model registration request] A ratchet gear is connected to a main gear rotated by a motor, a locking pawl for locking this gear is provided on a detection cam that detects the end of charging of a shutter, etc., and a charge lever is provided so as to be able to come into contact with the detection cam. A sprocket lever is provided in connection with the sprocket switch, and the sprocket lever is connected to the sprocket cam, and the sprocket lever is connected to the sprocket cam, and the charge lever and the sprocket switch are connected to each other, and A camera film winding device equipped with a slide lever that is released by pressing the button.