JPH0256781A - Recording and reproducing device - Google Patents

Abstract

PURPOSE:To make the entire device small in size and to reduce the number of parts by supporting and fixing the near center of a guiding shaft in an axial direction and fixing the guiding shaft by adhesion. CONSTITUTION:A carriage 6 equipped with a pair of heads 4 and 5 moves in the diameter direction of a disk 1 by receiving the precession driving force of a step motor 8 fixed to a frame 3 and is positioned in an optional position according to the precession of the motor. The near center of the guiding shaft 7, which guides to move the carriage 6, in the axial direction is made to adhere and fixed to the frame 3 and the shaft 7 is engaged with bar rings 6a and 6b provided in the carriage 6 so as to freely slide in the axial direction on both sides of the adhering and fixed part. Thus, it is unnecessary to provide parts to be fixed on both end parts of the shaft 7, so that the shaft can be set in a shaft one and the entire device can be made small in size. Since the shaft 7 is made to adhere to be fixed, the number of parts can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a head positioning mechanism in a recording/reproducing apparatus, and more particularly to a guide shaft fixing structure.

[Prior Art] FIG. 5 shows an example of a guide shaft fixing structure of a head positioning mechanism in a conventional recording/reproducing apparatus.

A carriage 52 carrying a head 51 moves in the radial direction of a disk 55 under the driving force of a step motor 54 fixed to a frame 53 serving as a frame. The guide shaft 56 that guides the articulated movement of the carriage 52 is
A clamp plate that slidably engages with holes 52a and 52b provided in the carriage 52, has both ends placed on steps 53a and 53b provided in the frame 53, and is fixed to the frame 53 with screws 57a and 57b. 58a and 58b
It is fixed by pressing.

[Problems to be Solved by the Invention] In the conventional guide shaft fixing structure as described above, the guide shaft is provided with fixed parts at both ends, so that part becomes long in the axial direction, resulting in a large device. It had the problem of becoming

Furthermore, since a clamp plate and screws for fixing the slide shaft are required, the number of parts increases and the cost is high.

[Means for Solving the Problems] In order to solve the above problems, the recording/reproducing device of the present invention includes a frame as a frame, a spindle motor fixed to the frame to rotate a disk, and a spindle motor for rotating a disk. , a head for reproducing, a carriage on which the head is mounted and guided so as to be movable in the radial direction of the disk, a guide shaft that engages with the carriage and guides the movement, and an articulated drive for the carriage. and move it into place.

A recording/reproducing apparatus comprising a step motor for positioning, wherein the guide shaft is adhesively fixed to the frame at approximately the center in the axial direction, and the carriage has at least two sliding parts, and the carriage has at least two sliding parts. The sliding portion may be configured to be guided by being engaged with both sides of the guide shaft and the adhesive fixing portion.

[Function] According to the recording/reproducing device configured as described above, the guide shaft is supported and fixed approximately at the center in the axial direction, so it is not necessary to provide fixed parts at both ends of the guide shaft, and the guide shaft can be set short, and the entire device can be miniaturized.

In addition, by fixing the guide shaft with adhesive, there is no need to use a clamp plate etc. to fix the guide shaft.
The number of parts is reduced and assembly can be easily automated.

[Example] An embodiment of the present invention will be described below based on the drawings.

FIG. 1 is a plan view showing an outline of the recording/reproducing apparatus of the present invention;
FIG. 2 is a perspective view of the main part of the adhesive fixing part of the guide shaft, FIG. 3 is a cross-sectional view of the main part, and FIG. 4 is a plan view of the main part showing the adhesive filling state.

In FIG. 1, a spindle motor 2 for rotationally driving a disk 1 as a recording/reproducing medium is fixed to a frame 3. As shown in FIG. A pair of heads 4 and 5 for recording and reproducing signals
The carriage 6 carrying the disc 1 moves in the radial direction of the disk 1 in response to the articulated driving force of a step motor 8 fixed to the frame 3, and is positioned at an arbitrary position according to the articulated motion of the step motor 8. A guide shaft 7 that guides the movement of the carriage 6 is adhesively fixed to the frame 3 at approximately the center in the axial direction, and slides in the axial direction with purlings 6a and 6b provided on the carriage 6 on both sides of the adhesively fixed part. movably engaged.

To explain in detail the fixing structure of the guide shaft 7, as shown in FIG. 2 and FIG. A flat part 3b parallel to the plane 3b, a side part 3C perpendicular to the flat part 3b, and a pressing part located at a position opposite to the side part 3C and formed in a shape that generates a pressing force F1 against the guide shaft 7. It is composed of 3d. In addition, the suppression part 3d
has some elasticity at its base. Further, the side surface portion 3C and the pressing portion 3d each have a recess 3 on the side that contacts the guide shaft 7, which forms a gap effective for filling the adhesive.
E and 3f are provided. Furthermore, as shown in Figure 4,
A contact wall 3g that contacts the end surface of the guide shaft 7 on the spindle motor 2 side and serves to position the guide shaft 7 in the axial direction is also provided integrally with the frame 3.

When the guide shaft 7 inserted through the burrings 6a and 6b of the carriage 6 is inserted in the direction of arrow A in FIG. 3 against the elastic force of the pressing portion 3d, the suppressing portion 3d generates a pressing force F1, and The force F2 presses the guide shaft 7 against the flat surface portion 3b, and the component force F3 of the pressing force Fl presses the guide shaft 7 against the side surface portion 3C, bringing it into close contact with the flat surface portion 3b. Predetermined positions in the directions of arrows B and C are obtained.

Next, the axial positioning and fixing of the guide shaft 7 will be explained based on FIG. 4. The abutment wall 3g of the guide shaft 7
The axial position of the guide shaft 7 is determined by pushing the opposite end surface in the axial direction with a tool such as a flat head screwdriver to a position where it abuts against the abutment wall 3g. Then, the guide shaft 7 is fixed by filling the recesses 3e and 3f of the holding portion 3a of the guide shaft 7 with adhesive as shown by diagonal lines in FIG. 4 and fixing the adhesive.

Note that a fixed amount of adhesive is filled in a predetermined position, and no other material other than adhesive, such as a clamp plate, is required to fix the guide shaft 7, so the assembly process for fixing the guide shaft 7 is easy. can be automated.

[Effects of the Invention] As described above, according to the recording and reproducing apparatus of the present invention, approximately the center in the axial direction of the guide shaft that guides the carriage on which the head for recording and reproducing is mounted is movably in the radial direction of the disk. In addition to being adhesively fixed to the frame, the carriage has at least two sliding parts, and the sliding parts are configured to be guided by engaging with the guide shaft on both sides of the adhesively fixed part. Therefore, it is not necessary to provide fixed parts at both ends of the guide shaft, the guide shaft can be set short, and the entire device can be downsized.

In addition, by fixing the guide shaft with adhesive, there is no need to use a clamp plate etc. to fix the guide shaft.
The number of parts is reduced, and the assembly process for fixing the guide shaft can be easily automated, resulting in lower costs.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing the outline of the recording/reproducing apparatus of the present invention;
Figure 2 is a perspective view of the main part of the adhesive fixing part of the guide shaft, Figure 3 is a sectional view of the main part, Figure 4 is a plan view of the main part showing the adhesive filling state, and Figure 5 is the conventional guide shaft fixation. FIG. 2 is a perspective view of a main part showing an example of a structure. 3... Frame 3a... Guide shaft holding part 3g... Contact wall 6... Carriage 7... Guide shaft and above Applicant Seiko Epson Corporation Agent Patent attorney Kizobe Suzuki et al. 1 personFigure 2Figure 1Figure

Claims (1)

[Claims] A frame as a frame, a spindle motor fixed to the frame to rotate the disk, a head for recording and reproducing information on the disk, and a head mounted with the head and guided so as to be movable in the radial direction of the disk. A recording/reproducing device comprising: a carriage; a guide shaft that engages with the carriage to guide its movement; and a step motor that moves and positions the carriage to a predetermined position by articulately driving the carriage. The shaft is adhesively fixed to the frame at approximately the center in the axial direction, and the carriage has at least two sliding parts, and the sliding parts are engaged on both sides of the guide shaft and the adhesively fixed part. What is claimed is: 1. A recording/reproducing device characterized in that it is configured to have a structure in which it is guided by a guide.