JPS6292180A - Information recording and reproducing device - Google Patents

Abstract

PURPOSE:To prevent a weight of a head main body from being exerted to an engaging member engaged with a screw slot of a lead screw bottom and moving the head main body by adopting the constitution that a support provided to a recording or a reproducing head is pressed into contact with the upper part of the lead screw to support the weight of the head main body. CONSTITUTION:A cylindrical engagement member 14 engaged with a screw slot of a bottom of a lead screw 15 is moved incorporatedly to the prescribed recording or reproduction in a direction B-B' to apply record or reproduce the information. In this case, the weight of the head main body 10 is exerted to a guide shaft 11 fitted to the head main body 10 movably and the support plate 12 pressed into contact onto the lead screw 15. Thus, the weight of the head main body 10 is not applied to the engaging member 14 and since the engaging member 14 has elasticity, the member 14 is always engaged with a screw slot of the bottom of the lead screw 15.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an information recording/reproducing device for recording and/or reproducing information on an information recording medium such as a card, sheet, or disk. .

(Conventional Technique 'pF?) Conventionally, in this type of information recording and reproducing apparatus, a feeding mechanism shown in FIG. 6, for example, has been used to move the recording or reproducing head relative to the information recording medium.

That is, on the top of the disk-shaped information recording medium 1, there is a frame 2.
A relatively lightweight head body 4 such as a magnetic head is movably inserted into a guide shaft 3 disposed in A cylindrical retaining member 6 fixed to the end face of the head body 4 is engaged with a thread groove on the upper part of the lead screw 5. A drive motor 7 such as a stamp motor connected to the lead screw 5 is By rotating, the head main body 4 can be reciprocated in the a-a' force direction via the engaging member 6 engaged with the thread groove of the lead screw 5, and information can be recorded or reproduced. An engaging member 6 engaged with the thread groove on the upper part of the lead screw 5
also has the function of supporting the load of the head body 4.

However, when a feed mechanism having a configuration similar to the above-described feed mechanism is used for a relatively heavy head body (not shown) such as an optical head, the engaging member 6 has the rigidity to support the load of the head body. In order to engage the upper thread groove of the lead screw 5 and support the load of the head body, the diameter of the retaining member 6 is increased, and the lead screw 5
It is also necessary to increase the pinch interval of the thread groove. Therefore, the drive motor 7 for rotating the lead screw 5 requires a highly accurate drive motor 7 with a small minimum stamp angle, which has the disadvantage of increasing costs.

Further, the load of the head body is concentrated only on the contact surface between the retaining member 6 and the upper thread groove of the lead screw 5, which may impede smooth movement of the head body.

(Problems to be Solved by the Invention) The present invention has been made for the purpose of solving the problems of the above-mentioned conventional example,
It is an object of the present invention to provide an information recording and reproducing device that can smoothly move the head at low cost even when using a relatively heavy recording or reproducing head such as an optical head.

(Means for Solving the Problems) As a means for solving the problems described above, the present invention provides an information storage system for recording or reproducing information by moving a recording or reproducing head with respect to an information recording medium using a lead screw. In the recording/reproducing device, the recording or reproducing head includes:
The gist of the present invention is to provide a retaining member that engages with a thread groove at the bottom of the lead screw, and a support member that abuts the top of the lead screw.

(Example) The invention of the shank will be explained in detail below with reference to the illustrated embodiments.

In the first embodiment shown in FIGS. 1 to 3, reference numeral 10 denotes a relatively heavy head body such as an optical head at the bottom, and the head body 10 is guided through a hole formed substantially parallel to one side surface 10a of the head body 10. A shaft 11 is movably inserted. A plate-shaped support member 1 is placed on the other opposing side surface 10b.
2 is attached with screws 13, and below it is the support member 12.
A cylindrical retaining member 14 having elasticity is fixed substantially parallel to this. 15 is a lead screw disposed approximately parallel to the side surface 10b of the head main body 10, and the cylindrical retaining member 1 is inserted into the thread groove at the bottom of the lead screw 15.
4, the plate-shaped support member 12 is brought into contact with the upper part of the lead screw 15, and the lead screw 1
The head body 10 is supported on the head 5. Reference numeral 16 denotes a card-shaped information recording medium such as an optical card, and the information recording medium 16 is disposed below the head main body IO so as to be sandwiched between drive rollers 17. 18 is a drive motor such as a step motor that rotates the lead screw 15.

The information recording and reproducing apparatus according to the present invention is configured as described above, and first, when recording or reproducing the information recording medium 16 (A-A' force direction longitudinal direction), the head body 10 is fixed and the head body 10 is driven. Rotate the roller 17 to move the information recording medium 16 to A-
The A' force direction is moved to a predetermined recording or reproducing position, and information is recorded or reproduced. Next, A-A of the information recording medium 16
When recording or reproducing in the B-B force direction perpendicular to the 'direction', when the drive motor 18 is rotated by a predetermined feed amount, the connected lead screw 15 is also rotated by a predetermined feed amount. The cylindrical engagement member 14 engaged with the thread groove at the bottom of the lead screw 15
By rotating, B-B is integrated with the head body 10.
' direction and can record or reproduce information. At this time, the head body l
The load O is applied to the guide shaft 11 movably inserted into the head body 10 and the plate-shaped support member 12 that abuts on the lead screw 15, so the load of the head body 10 is applied to the engagement member 14. This does not occur, and since the retaining member 14 has elasticity, the engaging member 14 is always engaged with the thread groove at the bottom of the lead screw 15.

4 and 5 show a second embodiment of the present invention, and the same members as those in the first embodiment are given the same reference numerals and their explanations will be omitted. In this embodiment, instead of the cylindrical retaining member 14, a resilient plate-shaped engagement member 19 having a spherical protrusion 19a on its upper part is fixed. The protrusion 19a is engaged with a thread groove on the bottom of the lead screw 15. In this case as well, the same effect as that of the cylindrical retaining member 14 described above is performed.

(Effects of the Invention) As explained above, the information recording and reproducing device according to the present invention has the following features:
With a configuration in which the support member provided on the recording or reproducing head comes into contact with the top of the lead screw to support the load of the head body, the head is attached to the retaining member that engages with the thread groove at the bottom of the lead screw to move the head body. It can prevent the load from being applied to the main body.

Therefore, even when using a relatively heavy recording or reproducing head, there is no need to increase the diameter of the engaging member and the pitch interval of the thread groove of the lead screw, so the drive motor that rotates the lead screw has Smooth feeding can be achieved at low cost without using a high-precision drive motor with a small minimum step angle.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing main parts of a head feeding mechanism of an information recording/reproducing apparatus according to a first embodiment of the present invention, FIG. 2 is a side view showing the feeding mechanism of the same apparatus, and FIG. A schematic diagram showing a state in which the supporting member and the engaging member according to the first embodiment are arranged on the lead screw, FIG. 4 is a side view showing a head feeding mechanism of the information recording and reproducing apparatus according to the second embodiment of the present invention, Fifth
This figure is a schematic diagram showing a state in which a supporting member and an engaging member according to a second embodiment of the present invention are arranged on a lead screw, and FIG. 6 is a perspective view showing the main parts of a conventional head feeding mechanism. 10...Head body, 12...Supporting member, 14°1
9... Engaging member, 15... Lead screw, 16
... Information recording medium, 18 ... Drive motor, 19a.
・Protrusion agent Patent attorney Jo Taira Yamashita Figure 1 Figure 2 Figure 3 Cause Figure 4 Figure 5 Figure 6

Claims (1)

[Scope of Claims] 1) In an information recording/reproducing apparatus that records or reproduces information by moving a recording or reproducing head with respect to an information recording medium using a lead screw, the bottom portion of the lead screw is attached to the recording or reproducing head. An information recording/reproducing device comprising: an engaging member that engages with a thread groove of the lead screw; and a support member that abuts an upper portion of the lead screw. 2) The information recording/reproducing device according to claim 1, wherein the engaging member has elasticity.