JPH0231355A - Head structure - Google Patents

Abstract

PURPOSE:To exactly execute positioning without fixing a disk and a head by fixing a laser photo-detecting means and a magnetic field generating means to a linking member which has flexibility, operating spring force from one direction and abutting the linking member to a fixing member near the magnetic field generating means. CONSTITUTION:One edge of a linking member 7, which has the flexibility, is fixed to one part 3a of a carriage 3, which is the fixing means to fix a laser irradiating means 4, a prism 8 and an objective lens 9, and the other edge is fixed to a laser photo-detecting means 5 and a magnetic field generating means 6. A spring 13 is provided in the upper direction of the linking member 7 and the spring force is set so that the linking member 7 can be sandwiched near the laser photo-detecting means 5 and magnetic field generating means 6 and near a part 3b of the carriage 3. Thus, the positions of these means are prevented from being dislocated even with oscillation and impulse to be received in an information recording device during read and write operation.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a head structure of an information recording/reproducing device, and in particular,
This invention relates to a head structure for an optical recording/reproducing device that uses light.

[Summary of the Invention 1] According to an embodiment of the present invention, a flexible connecting member is interposed between the laser irradiation means, the laser receiving means, and the magnetic field generating means, and the connecting member is used as a fulcrum. This has the effect of rotationally moving the laser light receiving means and the magnetic field generating means, facilitating the well-known disk mounting operation, and stabilizing the positional accuracy after the movement.

[Prior Art] As a conventional technology, a head structure used in a floppy disk drive will be explained as an example.

The head structure is as shown in FIG. 3, in which a head 3.4 is provided on a carriage 2 that is movable in the radial direction of the disk l.
3 is fixed to the carriage 2, 4 is fixed to the carriage 2,
It is connected via a spring 5 so that it can move up and down. The head 4
As shown in the figure, when the disk is mounted, it is lifted by a well-known cartridge guide means 7 or the like. The user inserts the disk l into the space between the disks 3.4. Thereafter, the cartridge guide means 7 is lowered. Then, the disk 1 in the cartridge is inserted into the head 3.
It is sandwiched between 4. Since the floppy disk is flexible, it can be bent slightly by the force of the spring 6 via the head 4.

Therefore, even if the height of the head 3.4 varies, or even if the height of the disk mounting surface of a well-known spindle motor for rotating the disk l varies, the front and back surfaces of the disk l can be reliably adjusted as described above. It can be brought into close contact with the head 3.4.

Information can be read and written by the well-known cooperation between the head 3.4 and the disk.

[Problems to be Solved by the Invention] In the case of the floppy disk drive, as described above, the disk l is flexible, and the head 3.4
Since the head 3 is of the type that comes into close contact with the disk 1,
By fixing the head to the carriage 2, the head could be positioned reliably in this way.

However, in the case of an optical recording/reproducing device using a laser, the disk and head must be accurately positioned without being brought into close contact with each other, which is an object of the present invention.

[Means to solve the problem]

Laser irradiation means, laser reception means, magnetic field generation means,
A flexible connecting member is interposed between one end of the fixing means and the laser light receiving means or the magnetic field generating means, and the connecting member is fixed from one direction. A spring force is applied to bring the connecting member into contact with the fixing member near the laser light receiving means or the magnetic field generating means.

[Function] The laser irradiation means is fixed to a fixing means such as a carriage,
The laser light receiving means and the magnetic field generating means are fixed to a flexible connecting member fixed to the fixing means. Further, a spring force is applied from above the connecting member, and the spring force is received by the fixing means. By doing so, when the disk is mounted, the laser light receiving means and the magnetic field generating means can be moved using the connecting member as a fulcrum against the spring force, and after the disk is mounted.

The laser light receiving means and the magnetic field generating means are moved in the opposite direction by the spring force using the connecting member as a fulcrum. Then, one end of the connecting member comes into contact with a part of the fixing means and returns to its original position.

The contact position of the connecting member is near the laser light receiving means and the magnetic field generating means, and the contact position of the fixing means can be machined with high precision, so even if the disk is repeatedly mounted, the position of each of the means will remain the same. The reproducibility is good. In this way, a highly reliable optical recording/reproducing device can be realized without bringing the respective means into close contact with the disk.

[Example] An embodiment of the present invention will be described with reference to the drawings.

Fig. 1 is an assembled plan view showing an embodiment of the present invention, Fig. 2 is a side sectional view of Fig. 1, and in the whole figure, l is a frame, 2 is a rail fixed to the frame 1, and 3 is a carriage. , is supported by the rail 2, and serves as a means for fixing the laser irradiation means 4, the laser reception means 5, and the magnetic field generation means 6. A connecting member 7 has one end fixed to the part 3a of the fixing means, and the laser light receiving means 5 and the magnetic field generating means 6 fixed to the other end, and is made of a thin plate and has flexibility. 8 is prism,
9 is an objective lens, 10 is a disk, 11 is a cartridge for storing the disk, 12 is a cartridge guide means,
13 is a spring, 14 is a spindle motor, and 15 is a disk mounting surface.

The operation will be explained.

When the user inserts the cartridge 11 from the left side of FIG. 1, the carriage 3 is inserted as shown in FIG.
The cartridge 11 is inserted without interfering with the space between the connecting member 7 and the connecting member 7, and in the fixed position, the cartridge 11
also descends.

The connecting member 7 engages with the holder 12 as shown in the figure, and since a spring 13 is engaged with the connecting member 7, the connecting member 7 also moves its thin plate portion under the force of the spring. It rotates as a fulcrum and descends. During the lowering movement of these elements, the central hole of the disk 10 housed in the cartridge engages the shaft of the spindle motor 14, and eventually the disk 10 is held on the mounting surface 15.

Further, since the well-known shutter (not shown) of the cartridge 11 is open, the connecting member 7 is smoothly lowered, and the laser receiving means 5, the magnetic field generating means 6, and the magnetic field generating means 6, which are fixed to the connecting member 7, are smoothly lowered. also approaches the disk lO.

Eventually, a part of the connecting member 7 is attached to the carriage 3.
It contacts M3b. At this position, the connecting member 7 is held and positioned between the carriage 3 3b, which is a fixing member of the connecting member 7, and the spring 13. Then, the laser light receiving means 5 and the magnetic field generating means 6 are also positioned in the height direction. Since the connecting member 7 is set to be wider than that shown in FIG. 1, positioning performance in the direction perpendicular to the longitudinal direction is also maintained. The center positions of the laser light receiving means 5 and the magnetic field generating means 6 substantially coincide with the center of the objective lens 9 fixed to the carriage 3. Under the action of the control means (not shown) of the information recording device, the spindle motor 14 rotates, and the laser irradiation means 4 irradiates the laser, which passes through the prism 8 and the objective lens 9 and measures the thickness of the disk IO. The camera focuses on a well-known recording surface located approximately in the center of the image. During reading, the polarization direction of the laser changes depending on the presence or absence of a signal, and this changes the direction of polarization of the laser.
, and is sensed by the laser light receiving means 5 as brightness and darkness. At the time of writing, as is well known, the magnetic field generating means 6 is operated simultaneously with the laser irradiation.

That is, the recording surface is magnetized by the opposite magnetic field, and information is recorded in this non-recording state, in which a current is passed through the magnetic field generating means 6 while irradiating a laser in synchronization with a write signal.

After the read and write operations are completed, the holder 12 is returned to the position shown by the solid line in FIG. 2 by a predetermined operation by the user. Then, the connecting member 7 again engages with the holder 12 and rises, and the laser light receiving means 5 and the magnetic field generating means 6 also return to the solid line positions. Almost in synchronization with this operation, the cartridge 11. The disk 10 also rises. When the cartridge 11 is in the fixed position, the cartridge 11 is moved to the holder 1 by a predetermined action.
It is ejected from 2.

[Effects of the Invention] Due to the above structure, the present invention has the following effects.As an embodiment of the present invention, the laser irradiation means 4, the prism 8,
A flexible connecting member 7 was installed, with one end fixed to a part 3a of the carriage 3, which is a fixing means for fixing the objective lens 9, and a laser light receiving means 5 and a magnetic field generating means 6 fixed to the other end. . The connecting member 7 is attached to the carriage 3 so that the laser light receiving means 5 and the magnetic field generating means 6 maintain positional accuracy in the height direction during read and write operations.
A part of the laser light receiving means 5 and the magnetic field generating means 6 were brought into contact approximately in the vicinity 3b. Therefore, it is possible to accurately position these means without contacting the disk 10.
This prevents wear and tear on the disk and head, which occurs when the head is brought into contact with the disk, as in a floppy disk drive. Furthermore, by using laser light, the information recording density was improved compared to the conventional type, and the recording capacity of the - disc was significantly improved. Further, in one embodiment of the present invention, a spring 13 is provided above the connecting member 7, and the spring force is applied to the vicinity of the laser light receiving means 5, the magnetic field generating means 6, and
Since the connecting member 7 is installed near the portion 3b of the carriage 3 so as to sandwich it, the position of these means will not be distorted even when the information recording device receives vibrations or shocks during reading or writing. The stronger the spring force, the more stable the spring force becomes. However, if the spring force is strong, the connecting member 7 will bend at the fulcrum portion, resulting in errors in the heights of the laser light receiving means 5 and the magnetic field generating means 6. Therefore, as shown in one embodiment of the present invention, if the spring force is applied above or in the vicinity of the portion 3b, unnecessary moment will not be generated at the fulcrum portion. The positional accuracy of the means 6 is further increased.

With this structure, as mentioned above, a highly reliable, high-capacity information recording and reproducing device that is resistant to vibration and shock and has excellent position reproducibility even when the above-mentioned descent and ascent are repeated. , head structure can be provided.

In one embodiment of the present invention, the laser light receiving means 5 and the magnetic field generating means 6 are provided on one connecting member 7 with their centers aligned, but the invention is not limited to this, and only one means is provided. Similar effects can be achieved by providing the same or with different centers.

Further, the fixing member against which the connecting member 7 comes into contact does not have to be the carriage 3, but may be a member on the carriage 3.

6... Magnetic field generating means 7... Connecting member FIG. 3 is a side view showing the structure of a conventional floppy disk drive.

·disk ·carriage ·head ·Spring

[Brief explanation of the drawing]

FIG. 1 is an assembled plan view showing one embodiment of the present invention, and FIG. 2 is a side sectional view of FIG. 1. Frame rail carriage laser irradiation means laser reception means Applicant: Seiko Epson Corporation

Claims (1)

[Claims] Laser irradiation means, laser reception means, magnetic field generation means,
A flexible connecting member is interposed between one end of the fixing means and the laser light receiving means or the magnetic field generating means, and the connecting member is fixed from one direction. A head structure characterized in that the connecting member is brought into contact with the fixing member near the laser light receiving means or the magnetic field generating means by applying a spring force.