JPH031749B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head moving mechanism of an electronic camera, and more specifically, the present invention relates to a magnetic head moving mechanism for an electronic camera, and more specifically, an image of a subject incident through a lens is converted into an electric signal by an image sensor, and the magnetic head is transferred to a magnetic recording medium rotating at a constant speed. The present invention relates to a magnetic head moving mechanism for an electronic camera that moves the magnetic head to a predetermined position to record a subject image.

Generally, this type of electronic camera is shown in Figures 1 and 2.
It is configured as shown in Figures A and B. That is, in FIG. 1, the reference numeral 1 indicates the housing of the electronic camera, and the reference numeral 2 indicates the lens. Inside this housing 1, an image sensor 3 is provided which converts a subject image incident through a lens 2 into an electrical signal. Also, provided within the housing 1 is a magnetic head 5 that converts an electrical signal from the image sensor 3 into a recording signal and records it on a magnetic disk 4 rotating at a constant speed. The magnetic disk 4 is housed in a cassette case (not shown) so that it can be removably loaded from the back side of the housing 1.
It is rotated by a motor, which is the drive source shown in . Also, inside the housing 1 is a magnetic head 5.
A moving mechanism (not shown) is provided for moving the magnetic disk 4 to a predetermined position on the magnetic disk 4.

On the other hand, a release button 7 and the like are provided on the operation section of the housing 1 to determine the recording timing of the subject image.

That is, as shown in FIGS. 2A and 2B, this electronic camera sequentially and intermittently moves the magnetic head 5 toward the center or the outer edge of the magnetic disk 4 at a constant pitch, and captures one image each time the magnetic disk rotates once. images are recorded, and one recording track A and one guard band B are alternately formed concentrically on the surface of the magnetic disk 4.

By the way, recently, in this type of electronic camera, 1
Electronic cameras that are capable of single-shot and continuous shooting have been proposed. However, in the conventional electronic camera of this type, a function key was provided on the operating section of the camera, separate from the release button, for selecting either single-shot mode or continuous shooting mode. Therefore, for example, when switching from single-shot shooting to continuous shooting,
You have to operate this function key,
There were times when I would miss a shot start. In addition, the moving mechanism for the magnetic head is complicated and the number of parts increases, contributing to an increase in manufacturing costs.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a magnetic head moving mechanism for an electronic camera that is simple in structure and highly reliable, allowing automatic selection between single-shot and continuous shooting through a single operation.

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

3 and 4A and 4B each illustrate an embodiment of the present invention, and the same parts in each figure as in FIGS. 1 and 2 are given the same reference numerals.

The reference numeral 8 in FIGS. 3 and 4 indicates a moving lever rotatably supported on the inner surface 1a of the housing 1. As shown in FIGS. A magnetic head 5 is fixed to the intermediate portion of this lever 8 so as to make light contact with the surface of the magnetic disk 4, and this magnetic head 5 is connected to a control circuit (not shown). Further, a large gear 8a is formed at the tip of the moving lever 8, and this large gear 8a meshes with a small gear 9a fixed coaxially with a Geneva gear 9, which will be described later. The Geneva gear 9 is rotatably supported on the inner surface 1a, and semi-elliptic notches 9b are formed at a constant pitch on the circumferential surface of the gear 9 over the entire circumference. A coil spring 11 is rotatably supported on the lower part of the release button 7 in the notch 9b of the Geneva gear 9.
A claw 10 that is rotatably slidable in the counterclockwise direction in the figure is locked. This pawl 10 rotates the Geneva gear 9 one pitch at a time.

The release button 7 is provided so as to be movable up and down and depressable, and its upper end 7a penetrates through the housing 1 and projects to the outside. The release button 7 also has a release return spring 1, which will be described later.
The release return spring 12 has one end attached thereto, and the other end of the release return spring 12 is fixed to the inner surface of the upper wall. That is, the release return spring 12 functions to return the upper end 7a of the release button 7 to its original position when the upper end 7a is pressed down. In addition, a protrusion 7 is provided in the middle of the release button 7.
b protrudes, and this protrusion 7b is provided so that the upper end 7a returns to its original position by being engaged with the locking portion 1b inside the housing 1. Furthermore, this protrusion 7b is provided so that the release button 7 When pressed, a movable contact 13a of the switch 13, which will be described later, is provided so as to come into contact with a fixed contact 13b. The switch 13 is connected to a control circuit (not shown), and this control circuit is configured to energize the magnetic head 5 and the motor 6 when a voltage from the switch 13 is applied. Further, a recess 7c is formed in the projection 7b, and the recess 7c is provided so as to engage with a bent portion of a leaf spring, which is a movable contact 13a of the switch 13, so that the operator feels a click. ing.

On the other hand, the magnetic disk 4 is located on the inner back surface 1 of the housing 1.
Boss 14 of pulley 14 rotatably supported on a
It is detachably attached to the motor 6 and is configured to rotate at a constant speed by an endless belt 16 stretched between a pulley 14 and a pulley 15 fixed to the shaft of the motor 6. . Further, a capstan roller 18 fixed on a disk 17, which will be described later, is provided between the endless belts 16 so as to have a slight gap between the endless belts 16 and the endless belts 16.

The disk 17 is rotatably supported on the inner surface 1a of the housing 1, and a pin 17a is provided on the outer peripheral surface of the disk 17.
is implanted, and the pin 17a engages with the notch 9b of the Geneva gear 9. The capstan roller 18 is made of, for example, elastic rubber, and a pinch roller 20 rotatably supported on the lever 19 via the endless belt 16 is provided near the capstan roller 18. The lever 19 is rotatably supported on the inner surface 1a, and is given rotational sliding ability in the clockwise direction in the figure by a biasing means (not shown), and the pinch roller 20, like the capstan roller 18, is attached to the endless belt. 16 with a slight gap. Also, this lever 1
A contact portion 21 is provided at the upper end of the lever 9 at a position facing the lower end portion 7d of the release button 7 so as to be movable up and down, and a coil spring 22 is elastically loaded between the upper end of the lever 19 and the contact portion 21. There is. Therefore, when the release button 7 is pressed, the lever 19
rotates counterclockwise to press the endless belt 16 between the capstan roller 18 and the pinch roller 20, causing the capstan roller 18 and the disc 17 to rotate.

The operation of this embodiment configured as described above will be explained. First, release button 7
When you press down to the position where you feel a click (position 7d' in FIG. 4A), the pawl 10 separates from the notch 9b of the Seneba gear 9, and the protrusion 7 of the release button 7
b is the movable contact 13a of the switch 13 and the fixed contact 1
3b, the switch 13 becomes conductive. As a result, the switch 13 applies voltage to a control circuit (not shown), and the control circuit drives the drive source 6 at a constant speed and rotates the magnetic disk 4 via the pulley 15, endless belt 16, and pulley 14. At the same time, an electrical signal from an image sensor (not shown) is sent to the magnetic head 5. The magnetic head 5 is
This electrical signal is converted into a magnetic signal and one subject image is recorded during one rotation of the magnetic disk 4,
One recording track A is formed on the magnetic disk 4.

When the release button 7 is released, the release button 7 returns to its original position due to the biasing force of the release return spring 12, and the pawl 10 engages with the next notch of the Seneva gear 9, moving the Seneva gear 9 one pitch. The small gear 9a fixed coaxially with the Seneba gear 9 rotates the moving lever 8 clockwise. Therefore, the magnetic head 5 fixed to the moving lever 8 moves toward the center of the magnetic disk 4 with a constant track width, forming one recording track A and one guard band B. At the same time, the switch 13 also becomes non-conductive, and the rotation of the magnetic disk 4 is stopped.

The above explanation is for single-shot shooting, and in the case of continuous shooting, when the release button 7 is further pressed, the lower end 7d of the release button 7 presses the contact part 21 of the lever 19 and compresses the coil spring 22. Rotate the lever 19 counterclockwise. Therefore,
The pinch roller 20 presses the capstan roller 18 via the endless belt 16, and the capstan roller 18 receives the rotational force of the endless belt 16 and rotates clockwise together with the disc 17.
A pin 17a implanted on the outer circumferential surface of the pin 7 rotates the Seneva gear 9 by one pitch in the counterclockwise direction. Therefore, as mentioned above, the magnetic head 5 is connected to the magnetic disk 4.
The disk 17 moves toward the center at a constant track width, and records the next object image while the disk 17 rotates once. When the disk 17 rotates once, the pin 17a engages with the next notch in the Senever gear 9, and the Senever gear 9 is rotated one pitch in the same manner as described above. Thereafter, the above-described operations are repeated, and continuous photographing is performed. Therefore, in this embodiment, single-shot shooting and continuous shooting can be automatically selected simply by operating the release button.

Incidentally, the feed pitch of the magnetic head according to this embodiment corresponds to the one-pitch feed of the Seneva gear.
The feeding pitch of the magnetic head in single-shot shooting and continuous shooting matches perfectly, and an accurate track pitch can be formed. Further, according to this embodiment, the comb interval time in continuous shooting can be freely selected by changing the diameter ratio of the capstan roller and the disc.

As is clear from the above description, the present invention includes a gear mechanism that moves the magnetic head toward the center or toward the outer edge of the magnetic disk, and a first operation that operates the gear mechanism at a constant pitch every time a single button is pressed. means, and a second gear mechanism for operating the gear mechanism at a constant pitch at regular intervals according to a single button operation time.
By adopting a configuration consisting of an operating means, single-shot shooting and continuous shooting can be automatically selected with a single button operation, and the simple structure has fewer parts and has the advantage of being compact. It has a positive effect.

[Brief explanation of the drawing]

Figures 1 and 2 both explain the principle of an electronic camera. Figure 1 is a perspective view showing the external appearance of the electronic camera, Figures 2A and B are explanatory views, and Figures 3 and 4. 3 shows an embodiment of the present invention, FIG. 3 is a rear sectional view of a magnetic head moving mechanism according to an embodiment, FIG. 4A is a partially enlarged view of FIG. 3, and FIG.
FIG. 4B is a side view of FIG. 4A. DESCRIPTION OF SYMBOLS 1...Housing, 4...Magnetic disk, 5...Magnetic head, 66...Motor, 7...Release button, 8...Movement lever, 9...Seneba gear, 10...Claw, 14,
15...Pulley, 16...Endless belt, 17...
Disc, 18...capstan roller, 19...lever, 20...pinch roller.

Claims (1)

[Scope of Claims] 1. A magnetic head moving mechanism for an electronic camera that records a subject image by sequentially moving a magnetic head to predetermined positions on a magnetic recording medium rotating at a constant speed,
a gear mechanism that sequentially moves the magnetic head toward the center or toward the outer edge of the magnetic recording medium; a single push button; and when the push button is pushed to a first position, the gear mechanism is actuated by a certain pitch. a first actuating means for activating the push button; and a second actuating means for activating the push button.
1. A magnetic head moving mechanism for an electronic camera, comprising: a second actuating means for continuously operating a magnetic head at a predetermined pitch at a predetermined time interval according to the pushing operation time when the magnetic head is pushed to the position. 2. The magnetic head moving mechanism for an electronic camera according to claim 1, wherein the second operating means is driven by the same drive source as the drive source for the magnetic recording medium.