JPS6265273A - Attaching structure for pickup element - Google Patents

Abstract

PURPOSE:To attach a magnetic head with high precision by adhering a projecting part of a carriage and the peripheral edge of an aperture part of a connecting member to each other and adhering both lower ends of the connecting member to the upper face of an attaching plate. CONSTITUTION:A crank type attaching metal fitting 45 to which a magnetic head 46 is attached is moved to set a magnetic head 46 to a proper position of a magnetic sheet surface. A moving arm of a 6-direction adjusting jig omitted in the figure is moved to adjust swing, inclination, azimuth, deviation from the center, and the extent of projection. A U-shaped connecting member 43 is covered on a head carriage 42 to place a projecting part 42A of the carriage 42 in an aperture part 43A of the connecting member 43, and an adhesive A is applies between the projecting part 42A and the peripheral edge of the aperture part 43A, and an adhesive B is applied between lower ends 43B of the connecting member 43 and the metal fitting 45. The projecting part 42A and lower ends 43B are adhered simultaneously to make both adhesive layers uniform, and adhesive layers are hardly affected by the change of conditions because layer directions of adhesive layers are made different from each other.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a mounting structure for a pickup element, and more particularly to a mounting structure for a pinqua knob element such as a magnetic head used in a magnetic recording or reproducing device such as an electronic camera. .

[Background of the invention]

Recently, objects have been imaged purely electronically by combining imaging devices such as solid-state imaging elements and image tubes with recording devices that use magnetic sheets, which are inexpensive and have a relatively large storage capacity, as recording media. Electronic camera systems have been developed that record on a rotating magnetic sheet and reproduce images using a separate television system or printer.

By the way, this type of magnetic sheet used in electronic cameras and the like differs from the magnetic sheet used in general magnetic recording and reproducing devices, in that it records still images or video information at high density, and rotates at high speed. . Therefore, magnetic heads that record on or read from magnetic sheets by contacting them are used in electronic cameras and the like because of the need for accurate alignment adjustment with respect to the magnetic sheets.
A magnetic head used for recording or reproducing still image information, etc. requires five adjustments relative to the magnetic sheet: (1) protrusion amount, (2) tilt angle, (2) center shift, (2) azimuth shift, and (2) tilt. These five adjustments will be sequentially explained below with reference to FIGS. 1 to 3.

In FIG. 1, reference numeral 10 denotes a magnetic sheet, 12 a magnetic head for recording or reproducing information on the magnetic sheet 10, and 14
is a regulation plate that is provided at a position facing the magnetic head 12 with the magnetic sheet 10 in between, and allows the magnetic sheet 10 to align with the magnetic head 12.

The magnetic head 12 requires a protrusion amount Ea within a predetermined range with respect to the magnetic sheet 10, and precise adjustment is required in order to perform better recording and reproduction and prevent wear of the magnetic head and recording medium. be.

In addition, in order to obtain good reproduced images even when the same recording medium is loaded into different playback machines, the recording head and playback head are separated, as in the case where the recorder and playback machine are configured separately. When using a magnet, the inclination angle θa as shown in FIG. The tilt angle θC of the magnetic head with respect to the sheet 10 needs to be within a predetermined compatible range.

By the way, the conventional magnetic head mounting structure is to adjust the height of an L-shaped metal fitting to which a magnetic head is fixed in advance by interposing a plurality of shims of different thicknesses on the head carriage, and then attach it to the L-shaped metal fitting with adhesive after adjustment. The metal fittings were installed on the head carriage. However, in the conventional magnetic head mounting structure,
Since the L-shaped metal fitting and the head carriage are in surface contact, if the thickness of the adhesive layer exceeds 100 μm, the position of the head may be misaligned due to temperature changes or changes due to shrinkage during curing. Furthermore, when installing using shims, it took time and effort to insert the shims. Furthermore, the conventional henode mounting structure has a problem in that the machining accuracy of the shim has a large effect on the mounting accuracy of the magnetic head.

[Purpose of the invention]

The present invention has been made in view of these circumstances, and it minimizes the size of the adhesive layer to reduce dimensional changes during curing.
The object of the present invention is to propose a mounting structure for a pink-up element that can solve the problems of the prior art described above by increasing its strength.

(Summary of the Invention) T11 In order to achieve the above object, the present invention includes the installation of a pickup element that is attached to a carriage and moves in the radial direction of a rotating disk-shaped recording medium to perform recording or reproduction on the disk-shaped recording medium. The structure consists of a carriage with a protrusion formed thereon, a mounting plate with a pickup element fixed to one end, and a U-shaped cross section, with the protrusion of the carriage placed on the top surface with a slight gap. a connecting member in which a possible opening is formed, and the protrusion of the carriage and the periphery of the opening of the connecting member are in contact with each other, and the lower end of the connecting member is adhered to the upper surface of the mounting plate. It is a feature.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a pickup element mounting structure according to the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 4 shows a plan view of a magnetic sheet bank used in a magnetic recording or reproducing device such as an electronic camera, and FIG. 5 is a sectional view taken along the line 1--2 in FIG. As shown in FIG. 4, the magnetic sheet pack 16 has a substantially rectangular shape,
Magnetic sheet 18 on which still image information etc. are recorded
is rotatably stored. A center core 20 as a reinforcing member is provided in the center of the magnetic sheet 18, and this center core 20 is exposed to the outside through a circular opening 22 of the magnetic sheet bank 16, and a central core 20 is provided in the opening 22. supported. A window 24 in which a magnetic head, which will be described later, is located is opened in the magnetic sheet pack 16, and this window 24 for the magnetic head is opened and closed by a slideable shutter 26.

That is, the shutter 26 closes the core portion 24 to prevent dust from adhering to the magnetic sheet 18 before the magnetic sheet pack 16 is inserted into the inner bucket, which will be described later, and the magnetic sheet pack 16 is inserted into the inner bucket. Then, the shutter 26 moves downward in FIG. 4 to open the head core 24, making it possible to perform recording and reproduction on the magnetic sheet 1-18.

In FIG. 6, a magnetic recording or reproducing device is shown, and the magnetic recording or reproducing device is composed of a chassis 28, an inner bucket 30 into which the magnetic sheet pack 16 is inserted, and an upper lid 32. First, to explain the internal structure of the chassis 28, a motor 34 for driving a magnetic sheet is disposed in the chassis 28, and when the top cover 32 is closed, this motor 3
The drive shaft 36 of No. 4 fits into the center hole 21 of the center core 20 of the magnetic sheet pack 16 shown in FIG. 5, and rotates the magnetic sheet 18 within the magnetic sheet pack 16 at a predetermined number of rotations.

Further, in FIG. 6, 38 is a motor for driving the magnetic head;
40 is a lead screw, 41 is a guide shaft, 42 is a head carriage that is screwed into the lead screw 40 and is moved by the lead screw 40, 46 is a metal fitting 45 bent into a crank shape, and a U-shaped connecting member 43. This is a magnetic head attached to the head carriage 42 via the magnetic head. Therefore, when the motor 38 is rotated at a predetermined number of revolutions, the head carriage 42 is moved at a predetermined pitch in the axial direction of the guide shaft 41, and therefore the magnetic head 46 is moved in the radial direction of the magnetic sheath 18 (as shown in FIG. 6). moving in the direction of arrow A), still image information can be recorded or reproduced by forming an annular or spiral track on the magnetic sheet 18.

Leaf springs 50.50 are provided at predetermined intervals on the back surface of the upper M32, and a regulation plate holder 52 is attached to the leaf springs 50.50. The regulating plate holder 52 has a length corresponding to approximately the entire radius of the chassis 28, and the regulating plate holder 52 has a seventh
As shown in the figure, a regulation plate 54 is provided at a position facing the magnetic head 46 when the top cover 32 is closed. A groove 56 is formed in the regulation plate 54 in the direction of movement of the magnetic head 46 . On the other hand, on the left side of the chassis 28 in FIG.
8 is planted, and on the right side, pins 60 and 62 are planted. The pins 58, 60, and 62 of the receiver abut or fit into the elongated hole 53, holder surface 55, and round hole 57 provided in the regulation plate holder 52, respectively, with their upper surfaces when the upper ll32 is closed.
The height of the regulation plate 54 is regulated to maintain a predetermined distance from the magnetic head 46, and accurate positioning is performed.

A pin (not shown) is arranged on the magnetic sheet pack 16 holder, and the magnetic sheet 18 attached to the drive shaft is connected to the pack 16.
Rotates within the pack 16 without touching.

Next, the attachment structure between the crank fitting 45 to which the magnetic heel 46 is attached and the head carriage 42 will be described with reference to FIGS. 7 and 8. The crank fitting 45 is attached to the head carriage 42 via a U-shaped connecting member 43 in which an opening 43A is formed, as shown in FIG. That is, the head carriage 42 has a protrusion 42A formed on its upper surface, and the protrusion 42A is located at the opening 43A of the coupling member 43 as shown in FIG.
3A, and both lower ends 43 of the connecting member 43.
B and 43B are bonded to the upper surface of the crank fitting 45.

The bent portion at the lower end of the crank-shaped metal fitting 45 is designed to be convenient for handling during work stages such as adjustment (this portion can be held by hand to attach or remove).

The mounting procedure for the magnetic head mounting structure according to the present invention configured as described above is as follows.

(1) First, the crank-shaped mounting bracket 45 to which the magnetic head 46 is attached is moved to set the magnetic head 46 at an appropriate position relative to the magnetic sheet surface. That is, the magnetic head 46
The crank fitting 43, to which is attached in advance, is held by a movable arm of a six-direction adjustment mechanism (not shown), and by moving this arm, it is possible to adjust the tilt angle by two turns, the f-circle by two turns, the azimuth by three turns, and the center deviation adjusted. , adjust the amount of protrusion.

(2) After the adjustment, the crank-shaped fitting 45 is attached to the head carriage 42 via the U-shaped connecting member 43. That is, the connecting member 43 is placed over the head carriage 42 and the projection 42A of the carriage 42 is inserted into the opening 43 of the connecting member 43.
A, and apply an adhesive between the protrusion 42A and the periphery of the opening 43A, and also apply the adhesive to the bottom of the connecting member 43.
Attach the protrusion 42A to which adhesive B is applied between 343B and the henod carriage 42, and the lower end 43B at the same time (
By adhering), both adhesive layers can be made even, and since the layers of the adhesive layers are oriented in different directions, the structure is less susceptible to changes.

The above operations complete the adjustment and installation of the magnetic head.

In the embodiment described above, the protrusion 42A is formed to have a rectangular cross section, but it may also be formed into a pin shape.

In the above embodiments, the mounting of a magnetic node was explained as an example, but the present invention can also be applied to the mounting structure of an element that requires high precision such as an optical pickup.

〔Effect of the invention〕

As explained above, according to the pickup element mounting structure according to the present invention, the crank-shaped metal fitting to which the magnetic head is attached is attached to the head carriage in which the protrusion is formed and the opening is provided to receive the protrusion. Since it is bonded to the head carriage via the shape connecting member, the bonding area is reduced and the head can be installed easily and accurately.

[Brief explanation of drawings]

Figure 1 is an explanatory diagram showing the amount of protrusion and inclination angle of the magnetic head, Figure 2 is an explanatory diagram showing the center deviation and azimuth deviation of the magnetic head, Figure 3 is an explanatory diagram showing tilt, and Figure 4 is an explanatory diagram showing the magnetic sheet. FIG. 5 is a sectional view of the magnetic sheet pack taken along the v-v line in FIG. 4, FIG. 6 is a perspective view of the magnetic disk device, and FIG. 7 is an exploded perspective view of this embodiment. FIG. 8 is a sectional view of this embodiment. 18...Magnetic sheet, 28...Chassis,
42...Head carriage, 42A...Protrusion,
43... U-shaped connecting member, 43A... Opening, 45... Crank-shaped metal fitting, 46... Magnetic hemmet.

Claims (1)

[Claims] (1) In the mounting structure of a pickup element that is attached to a carriage and moves in the radial direction of a rotating disk-shaped recording medium to perform recording or reproduction on the disk-shaped recording medium, a carriage in which a protrusion is formed; It consists of a mounting plate to which a pickup element is fixed to one end, and a connecting member having a U-shaped cross section and an opening in the upper surface through which the protrusion of the carriage can be placed with a slight gap, A mounting structure for a pickup element, characterized in that the protrusion of the carriage and the periphery of the opening of the connecting member are adhered, and both lower ends of the connecting member are adhered to the upper surface of the mounting plate.