JPH0345336Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a recording or reading device, and more particularly to a device for moving the head of, for example, an electronic still camera.

BACKGROUND ART FIG. 4 is a typical prior art top view.
A magnetic head 2 is fixed to a carriage 3 facing a rotating magnetic sheet 1 as a recording medium. Guide shafts 4 and 5 extending vertically in FIG. 4 are inserted into both ends of the carriage 3.
The carriage 3 is movable vertically along FIG. A ratchet gear 6 is disposed facing the center of the rotating magnetic sheet 1 and is rotatable around the axis of a shaft 7. A cam 8 for moving the magnetic head 2 is integrally fixed to the ratchet gear 6.
A cam follower 9 that can come into contact with the cam surface 8a of the cam 8 is fixed to the carriage 3. This carriage 3 is biased radially inwardly by a spring 10. Therefore, the cam follower 9 has a spring 1
It is constantly in contact with the cam surface 8a with a spring force of 0. As the cam follower 9 moves along the cam surface 8a, the magnetic head 2 is displaced inward in the radial direction of the rotating magnetic sheet 1.

An electromagnetic solenoid 11 is arranged on the side of the guide shaft 5. The tip of the plunger 12 of this electromagnetic solenoid 11 (lower end in FIG. 4) is fixed to a connecting lever 13. One end of the connecting lever 13 is pivotally supported by a shaft 14 . By this,
The connecting lever 13 is angularly displaceable about the axis of the shaft 14. A driving pawl 15 is pin-coupled to the other end of the connecting lever 13 . This drive pawl 15 meshes with the ratchet gear 6. Ratchet gear 6
is equipped with a brake pawl 16 that controls the ratchet gear 6 to rotate exactly one tooth at a time. The amount of displacement of the plunger 12 when the electromagnetic solenoid 11 is excited is adjusted to a stroke in which the ratchet gear 6 rotates counterclockwise by one or more teeth and two or less teeth. When a pulsed voltage is applied to the electromagnetic solenoid 11 by an electric circuit (not shown), the electromagnetic solenoid 11 is excited, and the plunger 12 is thereby attracted. As a result, the ratchet gear 6 rotates by one tooth via the connecting lever 13 and the drive pawl 15, and the cam 8 also rotates accordingly. As a result, the carriage 3 and therefore the magnetic head 2 are displaced inward in the radial direction of the rotating magnetic sheet 1 by a predetermined amount of movement.

FIG. 5 is a simplified plan view of another prior art. In the prior art shown in FIG. 5, parts corresponding to the prior art shown in FIG. 4 are given the same reference numerals. A lead screw 22 is coaxially fixed to the output shaft 21 of the stepping motor 20 .
This lead screw 22 is screwed into a screw hole 24 formed in the moving plate 23. The moving plate 23 is integrally fixed to one end of the carriage 3.

When a pulse voltage is applied to the stepping motor 20 by an electric circuit (not shown), the lead screw 22 rotates, thereby causing the carriage 3 to rotate.
Therefore, the magnetic head 2 is displaced inward in the radial direction of the rotating magnetic sheet 1 by a predetermined amount of movement.

Problems to be Solved by the Invention In the above prior art, the electromagnetic solenoid 11 and the motor 2 are used as the driving source for moving the magnetic head 2.
Since an actuator such as 0 is used, power consumption is large. Therefore, it is not appropriate to use such an electric actuator in the case of, for example, a dry cell battery that supplies relatively little power, because the power consumption is too large.

The purpose of this invention is to solve the above technical problems,
It is an object of the present invention to provide a recording or reading device whose head is moved by manual operation.

Means for Solving the Problems The present invention comprises a recording medium, a head disposed facing the recording medium and performing at least one of recording and reading on the recording medium, a lever operated for reciprocating angular displacement, a rotational direction converting means provided in association with the lever for converting the reciprocating angular displacement of the lever into rotational movement in one direction; and a state in which the head faces the recording medium by the rotational power from the rotational direction converting means. and means for displacing the recording medium to the next recording area.

Operation According to the present invention, by manually angularly displacing the operating lever, the head performs a linear movement and is displaced to a position corresponding to the next recording area on the recording medium. Therefore, there is no need for an electric actuator as in the conventional case, and it is therefore possible to reduce power consumption.

Embodiment FIG. 1 is a simplified plan view of a head moving mechanism 31 of an electronic still camera 30, and FIG. 2 is a block diagram of the electronic still camera 30. Subject 3
The light from 2 passes through an optical system 33 to a CCD (Charge
Coupled Device) 34. This CCD34
The optical signal is converted into an electric signal by the controller 35, and is then applied to a control circuit 35 where it is binarized and recorded frame by frame from a magnetic head 36 onto a rotating magnetic sheet 37. This rotating magnetic sheet 37 is connected to the motor 38
Rotationally driven by. When the shutter 39 is operated and a shutter operation signal is given to the control circuit 35, the motor 38 is energized.

Note that the rotating magnetic sheet 37 has recording areas P1, P2, ..., corresponding to one frame along the circumferential direction.
Pn (generally referred to by the reference sign P) is formed.

Referring to FIG. 1, a magnetic head 36 is arranged facing a rotating magnetic sheet 37.
6 is fixed to the carriage 40. A guide portion 42 having a guide hole 41 is integrally formed at one end of the carriage 40 (the left end in FIG. 1). A guide shaft 43 is inserted through the guide hole 41 . The other end of the carriage 40 (the right end in FIG. 1) is provided with a male thread 46 that engages with a male thread 45 of a threaded rod 44. The threaded rod 44 is supported by bearings 47 and 48.

A gear 49 is fixed coaxially to the threaded rod 44 . This gear 49 meshes with the gear 50. gear 5
A mainspring 52 is attached to one end of the rotating shaft 51 (lower end in FIG. 1). This mainspring 52
is wound as the magnetic head 36 moves;
The wound state is maintained by a stopper 53. This stopper 53 is activated by pressing the operation key 54, thereby allowing the mainspring 52 to be wound back to its original state. When the mainspring 52 is rewound, the carriage 4
Therefore, the magnetic head 36 returns to its original recording start position.

At the other end of the rotating shaft 51 (upper end in FIG. 1),
A ratchet gear 55 is coaxially secured as shown in FIG. Furthermore, this ratchet gear 55
In connection with this, an operating lever 56 is rotatably mounted on the rotating shaft 51. One end of a return spring 80 is connected to the operating lever 56, and the other end of the return spring 80 is connected to a chassis (not shown). Further, a pawl 57 that meshes with the ratchet gear 55 is attached to the operating lever 56. When the operating lever 56 is angularly displaced in the direction of arrow A by manual operation,
The pawl 57 causes the ratchet gear 55 to rotate, which also causes the shaft 51 to rotate. The amount of angular displacement of the operating lever 56 is regulated by a stopper 81. On the other hand, when the operating lever 56 is angularly displaced in the direction opposite to the arrow A by the spring force of the return spring 80, the rotation of the ratchet gear 55 is prevented. In this way, the reciprocating angular displacement operating movement of the operating lever 56 is converted by the ratchet gear 55 into a unidirectional rotational movement of the shaft 51.

The gear ratio of the gears 49 and 50 and the pitch of the threaded rod 44 are defined as the radius from the recording area Pi where the magnetic head 36 is currently located when the operating lever 56 is angularly displaced from the rest position to the maximum allowable displacement angle θ. The value is selected such that the recording area is displaced to the next recording area Pi+1 on the inward direction.

Next, the head moving mechanism 3 having such a configuration
The operation according to 1 will be explained. First, assume that the magnetic head 36 is located in the recording area P1. First, when the shutter 39 is pressed, the motor 38
is energized, and the rotating magnetic sheet 37 rotates once.
Therefore, one frame worth of video signals is recorded by the magnetic head 36 in the recording area P1 of the rotating magnetic sheet 37. Then, the operating lever 56 is manually displaced by an angle θ. As a result, the rotating shaft 51 rotates, and along with this, the gears 48,
A threaded rod 44 rotates via 47. Therefore, the carriage 40 and therefore the magnetic head 36 move radially inward to reach the next recording area P2. Then, by operating the shutter 39 in the same manner as described above, the rotating magnetic sheet 37 rotates once. As a result, the second frame is recorded in the second recording area P2.
In this way, recording is performed sequentially over the predetermined recording areas. In this way, when the recording operation is completed in all recording areas, the stopper 53 is operated as described above by pressing the operation key 54, thereby rewinding the mainspring 52 to its original state. , so gear 47,4
8. The threaded rod 44 rotates in the opposite direction to that described above, so that the carriage 40 and therefore the magnetic head 36 move radially outward and return to the movement start position corresponding to the recording area P1.

After the magnetic head 36 has returned to its original position, the next object can be recorded by loading the next new magnetic head 36.

In the embodiment described above, the mainspring 52 was used as a mechanism for returning the magnetic head 36 from the end of movement position to the start position of movement. It may be configured such that this is performed manually.

Further, although the above-mentioned embodiments have described the recording operation, the present invention can also be suitably implemented in the case of reading.

Furthermore, although the above embodiments have been described with reference to an electronic still camera, the present invention can also be suitably implemented in head moving mechanisms in other recording and/or reading devices.

Furthermore, as a recording medium, a rotating magnetic sheet 37 is used.
was used, but tape may also be used.

Furthermore, although the above-described embodiments have been described with reference to magnetic recording, the present invention can also be suitably implemented in other optical recording or reading devices such as lasers.

Effects As described above, according to the present invention, it is possible to move the head facing the recording medium by manual operation. Therefore, power consumption can be reduced compared to the conventional case where an electric actuator is used.

[Brief explanation of the drawing]

FIG. 1 is a simplified plan view of a head moving mechanism 31 provided in an electronic still camera 30 according to an embodiment of the present invention, FIG. 2 is a simplified block diagram of the electronic still camera 30, and FIG. 3 is a control lever. A perspective view of the vicinity of 56, FIG. 4 is a plan view of a typical prior art,
FIG. 5 is a plan view of another prior art. 36... Magnetic head, 40... Carriage, 4
3... Rotating shaft, 44... Threaded rod, 45... Male thread, 46... Female thread, 49, 50... Gear, 51
...Rotating shaft, 52...Spring, 55...Ratchet gear, 56...Operation lever, P...Recording area.

Claims (1)

[Claims for Utility Model Registration] A recording medium, a head disposed facing the recording medium and performing at least one of recording and reading on the recording medium, a lever operated with reciprocating angular displacement, and a lever related to the lever. a rotational direction converting means for converting the reciprocating angular displacement of the lever into a rotational movement in one direction; and a rotational power from the rotational direction converting means to rotate the recording medium with the head facing the recording medium. An apparatus for recording or reading, comprising means for displacing to the next recording area.