JPS6337814A - Mounting structure of magnetic head - Google Patents

Abstract

PURPOSE:To attain thin profile for a rotary magnetic sheet device by forming a recess to a head carriage and arranging a magnetic head to the recess. CONSTITUTION:A magnetic sheet pack 10 is mounted in a rotary magnetic sheet device 4 and its packet is closed, then the magnetic sheet 12 is turned. In the mount structure 100 of the magnetic head, a recessed part 38A is formed to a head carriage 38 and a head is fitted to the recessed part 38A via a base plate 102, an azimuth adjusting plate 104, a head mount plate 106. The azimuth of the head is adjusted by adjusting screws 144A, 144B provided to the recessed wall 38B of the carriage 38. As a result, the profile of the device 4 is made thin and an electronic still camera equipped with the device 4 is miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a mounting structure for a magnetic head, and more particularly to a mounting structure for a magnetic head used in a magnetic recording or reproducing device such as an electronic still camera.

[Background of the invention]

Recently, imaging devices such as solid-state image sensors and picture tubes have been combined with recording devices that use magnetic sheets, which are inexpensive and have a relatively large storage capacity, to take purely electronic still photographs of the subject, using rotating magnetic sheets. An electronic still camera system has been developed and is attracting attention, in which the images are recorded on the screen and played back using a separate television system or printer.

The magnetic sheets used in such systems are usually in the form of magnetic sheet packs. A magnetic sheet pack rotatably stores a magnetic sheet for magnetically recording still image information, etc., and is used by being attached to a rotating magnetic sheet device built into an electronic camera.

By the way, in the conventional magnetic head mounting structure, the magnetic head is mounted on the head carriage via a metal fitting in an L-shaped mounting.゛Also, this type of magnetic sheet used in electronic cameras etc.
-Unlike the magnetic sheet used in the magnetic recording/reproducing device of (a), still images or video information etc. are recorded with high density,
It is also rotating at high speed.

Therefore, a magnetic head that contacts a magnetic sheet to perform recording or reproduction on the magnetic sheet must be accurately aligned with respect to the magnetic sheet.

Due to these circumstances, magnetic heads used in electronic cameras and the like for recording or reproducing still image information, etc., have problems with respect to the magnetic sheet such as: ■Protrusion amount, ■Tilt angle, ■Center shift, ■Azimuth shift, Five adjustments to the tilt are required. For this reason, a plurality of adjustment plates are required between the magnetic head and the hemlock carriage.

Due to these circumstances, additional space is required above the head carriage for the magnetic head, etc., resulting in an increase in the thickness of the rotating magnetic sheet device. [Object of the Invention] The present invention has been made in view of the above circumstances. It is an object of the present invention to provide a magnetic head mounting structure that can reduce the thickness of a rotating magnetic sheet device.

[Summary of the invention]

In order to achieve the above object, the present invention provides a mounting structure for a magnetic head that performs magnetic recording or reproduction on a magnetic sheet that is attached to a head carriage and rotatably housed in a magnetic sheet pack, in which a recess is provided in the head carriage. and a magnetic head is provided in the recess via an adjustment plate.

〔Example〕

Preferred embodiments of the magnetic head mounting structure according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 shows the overall shape of an electronic still camera to which an embodiment of the present invention is applied, where 1 is a camera body, 2 is a photographic lens barrel, 3 is a finder, 4 is a rotating magnetic sheet device, and 5 is a Switch 44 of the entire electronic still camera system, 6 is the shirt release button. and 8
9 is an eject button for taking out the rotating magnetic sheet pack 10 from the rotating magnetic sheet device 4; 9 is a function selection switch for selecting functions such as strobe light and continuous shooting; and 11 is a display section for the function selected by the function selection switch 9. be.

FIG. 2 shows a plan view of a magnetic sheet pack used in a rotating magnetic sheet device 4 such as an electronic camera, and FIG. 3 is a sectional view taken along the line A-A vA in FIG. As shown in FIG. 2, the magnetic sheet pack has a substantially rectangular shape, and a magnetic sheet 12 on which still image information and the like are recorded is rotatably housed inside the pack. A center core 14 as a reinforcing member is provided in the center of the magnetic sheet 12.
This center core 14 is exposed to the outside through a circular opening 16 of the magnetic sheet pack 10. This center core 1
4 is formed with a center hole 15, and an elastic piece (not shown) is formed in this center hole 15, and a drive shaft 32, which will be described later, is fitted into the center hole 15 of the center core 14 against the biasing force of this elastic piece. It has become. A window 18 in which a magnetic head, which will be described later, is located is opened in the magnetic sheet pack 10, and this window 18 for the magnetic head is opened and closed by a slideable shutter 20. That is, before the magnetic sheet pack 10 is inserted into a packet to be described later, the shutter 20 closes the window 18 to prevent dust from adhering to the magnetic sheet 12, and when the magnetic sheet pack 10 is inserted into the bucket, the shutter 20 closes the window 18 as shown in FIG. move downward to open the head window 18, and then open the magnetic sheet 1.
It becomes possible to record and play back to 2.

FIG. 4 shows the drive mechanism of the rotating magnetic sheet device. To explain this drive mechanism, a motor 30 for driving the magnetic sheet is disposed in the center, and the drive shaft 32 of this motor 30 is fitted into the center hole 15 of the center core 14 of the magnetic sheet pack 10 shown in FIG. Magnetic sheet pack 1
0, the magnetic sheet 12 is rotated at a predetermined rotation speed. Further, in FIG. 4, 34 is a stepping motor for feeding the magnetic head, and 36 is a lead screw connected to the output shaft of this motor 34 via a gear transmission means 35. 38
A head carriage is guided by guide shafts 40 and 41 installed in parallel, and a magnetic head 42 is provided on the head carriage 38 via a magnetic head mounting structure to be described later. A pin 44 is installed at one end of the head carriage 38, and a spring 4 is attached to this pin 44.
6 is locked, and this causes the head carriage 38
is biased toward the right in FIG. On the other hand, the lead screw 36 is screwed into a nut 48 fixed to the main body side, and its left end is in contact with the end surface of the head carrier 7-gear 38. Therefore, when the motor 34 is rotated at a predetermined number of revolutions, the screw 36 is rotated to the 7th position.
The movement of the guide shafts 40 and 41 causes the guide shafts 40 and 41 to be moved at predetermined pitches in the axial direction.
moves in the radial direction of the magnetic sheet 12, and the magnetic sheet 12
Still image information can be recorded or reproduced on a track-by-track basis.

As described above, the lead screw 36 is threaded into the threaded hole of the NAND 48, and when rotated by receiving the rotational force from the right end gear 35A that meshes with the gear 35, it moves in the left-right direction in FIG. The left end 36A of the lead screw 36 is attached to the side surface of the head carriage 38.

In the rotating magnetic sheet device configured as described above, first, the magnetic sheet pack 10 is installed in the rotating magnetic sheet device 4 shown in FIG. Rotate by 32. Further, the rotational force from the motor 34 is transmitted to the right end of the lead screw 36 via the gear transmission means 35, thereby causing the lead screw 36 to move rightward in FIG. 4. Since the head carriage 38 is biased to the right by the spring 46, when the lead screw 36 moves to the right, the head carriage 38 also moves to the right in FIG. 4 due to the biasing force of the spring 46. . Therefore, the magnetic head 42 moves in the radial direction of the magnetic sheet 12 from the outer circumferential side toward the inner circumferential side, and can magnetically record or reproduce still image information for each trunk.

Next, in FIG. 5, an exploded perspective view of the structure 100 for mounting the magnetic head is shown. Recess 38 in head carry 7
A is formed, and a magnetic head 42 is attached to this recess 38A via a base plate 102, an adjustment plate 104 for adjusting azimuth, and a head mounting plate 106. Upright pieces 108 and 110 are formed on two sides of the head mounting plate 106 by bending them upward, and the magnetic head 42 is attached to one of the upright pieces 108 via screws 112. The other upright piece 110 has a support plate 1 that is suction-supported by an arm 114 of a six-direction adjustment jig device shown by a two-dot chain line in the figure.
16 is provided at right angles to the upright piece 110.

Holes 120 and 124 are formed in the adjustment plate 104 for azimuth adjustment, and a pin 118 is inserted into the hole 120, and a pin 126 is inserted into the hole 124, respectively. On the other hand, holes 128 and 128 are formed in the base plate 102, and holes 128 and 128 are formed in the recess 38 of the head carriage 38.
A hole 132 and an oblong hole 134 are formed in A, respectively.

And the pin 118.12 screwed into the adjustment plate 104
6 are sequentially inserted into the holes 128 and 128 of the base plate 102, the hole 132 of the head carriage 38, and the oblong hole 134.

Washers 135, 135 and E-rings 138, 138 are attached to the lower end of each bottle 118, 126. As a result, the adjustment plate 104 inserts the bin 118 into the recess 38A of the head carriage 38 via the base plate 102.
It is mounted so that it can rotate freely around the center.

Furthermore, an upright piece 136 is bent and formed on the adjustment plate 104, and a hole 140 into which a screw 144A is screwed is formed. On the other hand, holes 142 and 142 are formed in the recess wall 38B of the head and throat carriage 38, and azimuth adjustment screws 144A and 144B are screwed into the holes 142 and 142. One screw 144A is connected to the hole 1 of the adjusting plate 104.
40, and the tip of the other screw 144B is brought into contact with the upright piece 136. Screw 144A for azimuth adjustment,
144B are screwed in alternately, the adjustment plate 104 rotates through the bin 118. As a result, the adjustment plate 104 and the base plate 102 rotate around the pin 118, and since the In air head 42 is placed directly above the bottle 118, the magnetic head 42 rotates around the gap. Azimuth adjustment is made.

Next, the operation of the magnetic head mounting structure according to this embodiment configured as described above will be explained.

The azimuth adjustment of the magnetic head 42 is performed using the head carriage 3.
Screws 144A and 144B provided in the recess wall 38B of No. 8
This is done by adjusting the screw in ■. That is, screw 144
A and 144B are screwed into the recessed wall 38B of the head carriage 38, and by rotating these screws 144A and 144B, the adjustment plate 104 is rotated about the pin 118. Since the pin 118 is located directly below the gap of the magnetic head 42, the magnetic head 42 rotates around the gap, thereby making it possible to adjust the azimuth. In order to install such a magnetic head, since the structure 100 has screws 144A and 144B for azimuth adjustment exposed on the side of the head carriage 42, the magnetic head 42 must be contacted while rotating the standard sheet. This allows for appropriate azimuth adjustment.

In this way, the magnetic head of this embodiment is attached to the structure 100.
The magnetic head 42 is attached to the head mounting plate 106 and the adjusting plate 10.
4. Since it is attached to the recess 38A of the head carriage 38 via the base plate 102, the rotating magnetic sheet device 4 is formed to be thin. And rotating magnetic sheet device 4
The electronic still camera equipped with this will be made smaller.

In this embodiment, another adjustment plate, for example, a plate for off-center adjustment, is interposed between the adjustment plate 104 for azimuth adjustment and the head mounting plate 106, and the magnetic head 42 is installed later. It may also be possible to make azimuth adjustment and the like possible. In this case as well, the magnetic head 42 is inserted into the recess 38 of the head carriage 38.
Since it is attached to A, the magnetic head 42 can be placed at a low position.

〔Effect of the invention〕

As explained above, according to the magnetic head mounting structure according to the present invention, a recess is formed in the head carriage and the magnetic head is disposed in the recess, so that the rotating magnetic sheet device can be made thin.

[Brief explanation of drawings]

FIG. 1 is a perspective view of an electronic still camera to which a magnetic head mounting structure according to an embodiment of the present invention is applied, FIG. 2 is a plan view of a magnetic sheet pack for an electronic still camera, and FIG. FIG. 4 is a perspective view of a drive mechanism of a rotating magnetic sheet device, and FIG. 5 is a perspective view of a magnetic head mounting structure according to an embodiment of the present invention. . DESCRIPTION OF SYMBOLS 10... Magnetic sheet pack, 12... Magnetic sheet, 32... Rotation drive shaft, 38... Head carriage, 38A... Recessed part of head carriage,
42...Magnetic head, 104-adjustment plate 106...
・Head mounting plate, 114A, 114B-Azimuth adjustment screw.

Claims (1)

[Claims] (1) In a mounting structure for a magnetic head that is attached to a head carriage and performs magnetic recording or reproduction on a magnetic sheet rotatably housed in a magnetic sheet pack, a recess is formed in the head carriage and the magnetic head is inserted into the recess. A magnetic head mounting structure characterized in that it is installed via an adjustment plate.