JP3210576B2 - Magnetic head holding mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head holding mechanism applied to, for example, a card reader / writer, a passbook reader / writer, and other devices for recording and reproducing information signals on a magnetic recording medium.

[0002]

2. Description of the Related Art Information signals are recorded on card readers / writers, passbook readers / writers, and other magnetic recording media.
A magnetic head used in a writing device is urged toward the magnetic recording medium so as to faithfully follow the recording surface of the magnetic recording medium, and is rotatably supported in accordance with the inclination of the magnetic recording medium.

[0003] The device described in Japanese Utility Model Laid-Open No. 60-760 is
An example of a conventional magnetic head holding mechanism, in which a head support lever is rotatably mounted on a head carriage that is linearly moved by a feed screw and a guide shaft, and a magnetic head is rotatably mounted on the head support lever. The magnetic head is urged toward the magnetic recording medium by rotating the head support lever, and the magnetic head itself rotates relative to the head support lever, thereby causing the magnetic head to move toward the magnetic recording medium. It is designed to follow the inclination.

[0004]

According to the conventional magnetic head holding mechanism, not only the one described in the above publication, but also a head supporting lever rotatably attached to the head carriage, which is turned, Since the magnetic head is made to advance toward the recording medium by the urging force, the rotation fulcrum of the head support lever is located at a position away from the moving position of the magnetic head, and the head carriage and the head support lever However, there is a problem in that the arrangement space is widened in the surface direction of the recording medium, the installation space is large and bulky, and the number of components is also large.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned prior art, and has as its object to provide a magnetic head holding mechanism capable of reducing the number of components while reducing the installation space to be compact. Aim.

[0006]

According to a first aspect of the present invention, a magnetic head is rotatably held by a holding member attached to a support frame.
A guide portion is formed in the support frame to guide the movement of the holding member by engaging the holding member, and a direction in which the guide member guides the holding member is set to a direction orthogonal to the recording medium. It is characterized by having been done.

According to a second aspect of the present invention, in the first aspect, the support frame and the feed screw are engaged so that when the feed screw is rotationally driven by the drive source, the support frame is moved. A guide member for guiding the movement of the support frame or the feed screw is disposed at a position substantially coinciding with an extension of the guide portion.

According to a third aspect of the present invention, in the second aspect of the present invention, the guide portion is a groove or a protrusion formed in a direction in which the magnetic head slides on the recording medium, and the holding member has a magnetic head. It is characterized in that a regulating portion for regulating the rotation range is formed.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of a magnetic head holding mechanism according to the present invention will be described with reference to the drawings. 1 to 4, reference numeral 1 denotes a support frame corresponding to a head carriage. The support frame 1 is inserted through a guide member 2 having a cylindrical shaft and linearly extends along the guide member 2. It is movable. A feed screw 3 is screwed into the support frame 1 in parallel with the guide member 2. Rotational force is transmitted to the feed screw 3 from a motor 12 via a pulley 13, a belt 14, and a pulley 15. Therefore, when the feed screw 3 is driven to rotate by the drive of the motor 12, the support frame 1 moves linearly.

The support frame 1 has an internal space whose upper part is open, and a magnetic head holding member 6 is formed in the internal space.
Is fitted. On the inner wall of the support frame 1, guide portions 4 are formed on both sides in the moving direction of the support frame 1 and are formed of vertical grooves. The guide portion 4 includes a lower guide groove 1a, a guide groove 1c slightly deeper than the depth of the guide groove 1a, and a gentle inclined groove 1b connecting the guide grooves 1a and the guide grooves 1c. Guide groove 1c
3 is slightly wider than the guide groove 1a as shown in FIGS. The support frame 1 can be made, for example, by integral molding of resin. However, the guide groove 1c is formed to be slightly wider and slightly deeper than the guide groove 1a as described above , so that the role of a punching margin at the time of integral molding is also achieved. Play.

The magnetic head holding member 6 has a guide protrusion 6a fitted in the pair of guide grooves 1a and a guide protrusion 6b fitted in the pair of guide grooves 1c, and these guide protrusions 6a, 6b are formed by the guide grooves. The fitting of the holding members 1a and 1c guides the holding member 6 in the vertical direction along the guide portion 4 and movably without rattling.
A repulsive coil spring 11 is interposed between the bottom surface of the holding member 6 and the fixed surface of the support frame 1, and the resilient force of the coil spring 11 urges the holding member 6 to move upward so as to protrude from the support frame 1. But support frame 1
The raised position is regulated by the locking portion 1h formed at the bottom.

The holding member 6 includes a head holder 7 which surrounds the magnetic head 5 and is provided integrally with the magnetic head 5.
Nearly the lower half of the is inserted. A shaft 8 extends through the holding member 6 and the head holder 7 in a direction substantially parallel to the guide member 2. There is a gap between the holding member 6 and the head holder 7 to some extent, and the head holder 7 is rotatably supported on the holding member 6 about the shaft 8 within the gap. However, one end of the shaft 8 penetrates the clearance hole 6 e formed in the side wall of the holding member 6 with a sufficient space, and fits into the hole of the azimuth adjustment plate 9 arranged on the outer surface of the holding member 6. Have been combined. Further, a protrusion 7b as a restricting portion projects downward from the lower end of the head holder 7, and this protrusion 7b is inserted into a hole 6d as a restricting portion formed on the holding member 6 with a sufficient space. The head holder 7 and the magnetic head 5 integrated therewith are rotatable about the shaft 8 within the range permitted by 6d, so that the head surface can follow the tilt of the medium. .

As shown in FIGS. 5 and 6, the azimuth adjusting plate 9 is slidably mounted on the side of the holding member 6, and the position of the azimuth adjusting plate 9 is adjusted by rotating the eccentric pin 10 from outside. The azimuth angle can be adjusted by rotating the magnetic head 5 in the horizontal direction with the other end (the left end in FIG. 1) of the shaft 8 as a fulcrum. In order to allow the azimuth adjustment plate 9 to move in the side direction, an idiom hole 9a is formed in the azimuth adjustment plate 9, and a fixing screw 7d attached to the holding member 6 is fitted into the idiom hole 9a. Numeral 9 is integrated with the holding member 6 with the position adjusted.

The tip of the magnetic head 5 is the medium guide 1.
6 is urged by the coil spring 11 in a direction in which it comes into sliding contact with a magnetic card, a passbook having a magnetic stripe, and other appropriate magnetic recording media 17. An inclined guide 7a is provided on an upper portion of the head holder 7 on the entrance / exit side (right side in FIG. 1) of the recording medium 17 to make the tip of the magnetic head 5 smoothly contact the recording medium 17.

As shown in FIG. 3, the guide member 2 is disposed at a position substantially coincident with an extension of the guide portion 4 formed on the support frame 1 and directly below the guide portion 4. On the other hand, the guide screw 3 is located on the side of the guide portion 4. A shielding member 1e protrudes from the lower portion of the support frame 1. When the support frame 1 moves to the limit position, the shielding member 1e penetrates to block light and move the support frame 1 to the limit position. A photo interrupter 17 for detection is provided. The support frame 1 is also provided with a protrusion 1d protruding laterally, and the protrusion 1d is guided by a guide 16 formed on the main body frame.

According to the above-described embodiment, the support frame 1 is moved in the horizontal direction along the guide member 2 by driving the motor 12 as a drive source to rotate the feed screw 3 so that the support The magnetic head 5 can be moved in the horizontal direction together with the frame 1. The movement of the magnetic head 5 causes the tip of the magnetic head 5 to move to the magnetic recording medium 1.
7, the information signal can be recorded on the recording track or the information signal recorded on the recording track can be reproduced. At this time, the magnetic head 5 is movably guided along the guide portion 4 of the support frame 1 via the holding member 6, and the guide direction is a direction orthogonal to the recording medium 17, and Since the magnetic head 5 is urged by the coil spring 11 in a direction in which the magnetic head 5 slides on the recording medium 17, the magnetic head 5 is
The recording medium 17 can be slid faithfully following the unevenness of the recording medium 17 without escaping from the recording medium 17.

Further, since the magnetic head 5 is rotatably supported within a predetermined range by the shaft 8 via the holding member 6, even if the recording surface of the recording medium 17 is inclined, the magnetic head 5 can move the recording medium It can slide faithfully according to the recording surface. Further, one end of the shaft 8 is supported by an azimuth adjusting plate 9, and the position of the azimuth adjusting plate 9 is adjusted to adjust the position of the shaft 8.
As a result, the magnetic head 5 also rotates in the horizontal direction with the other end serving as a fulcrum, and the azimuth adjustment is performed.

In addition, according to the illustrated embodiment, each of the guide projections 6a and 6b of the holding member 6 engages with each of the guide grooves 1a and 1c of the support frame 1, so that the magnetic head 5 is moved relative to the recording medium 17. While the guide protrusions 6a and 6b of the holding member 6 are in sliding contact with the surfaces corresponding to the bottom surfaces of the guide grooves 1a and 1c of the support frame 1 so that the magnetic head 5 is moved in FIG. Regulates rotation in a plane parallel to the paper.

Further, since the guide member 2 for guiding the movement of the support frame 1 is disposed at a position substantially coincident with the extension of the guide portion 4 for guiding the movement of the magnetic head 5, the magnetic head 5 and the guide member 2 are arranged in a position where they are vertically overlapped with each other, so that the arrangement space of the entire magnetic head holding mechanism is small and compact, and the number of parts is reduced because there is no need to interpose a lever as in the conventional case. There are advantages too.

The guide portion provided on the support frame 1 for moving the magnetic head in the direction in which the magnetic head slides on the recording medium is the guide groove 1a, 1b, 1c in the illustrated example. And the guide grooves provided on the magnetic head side engage with the guide protrusions, that is, the guide grooves 1a, 1b,
1c and the guide protrusions 6a and 6b may be in an opposite relationship, or other appropriate guide means may be employed. Also,
The guide member 2 and the feed screw 3 may be interchanged.
In short, the guide member or the feed screw for guiding the movement of the support frame 1 only needs to be arranged at a position substantially coincident with the extension of the guide portion.

[0021]

According to the first aspect of the present invention, the magnetic head is rotatably held by the holding member attached to the supporting frame, and the holding member is engaged with the holding frame in the supporting frame. A guide portion for guiding the movement of the holding member is formed, and the direction in which the guide member guides the holding member is set to a direction orthogonal to the recording medium, so that the magnetic head slides on the recording medium. Will be provided at a position overlapping the magnetic head,
Unlike the conventional arrangement in which the magnetic head holding mechanism is provided at a position distant from the magnetic head, the arrangement space of the entire magnetic head holding mechanism is reduced to be compact, and the number of parts is reduced.

According to the second aspect of the present invention, in the first aspect, the guide member or the feed screw for guiding the movement of the support frame is disposed at a position substantially coincident with the extension of the guide portion. Therefore, the magnetic head and the guide member are arranged at overlapping positions, and from this point, there is an advantage that the arrangement space of the entire magnetic head holding mechanism is reduced and the magnetic head holding mechanism is compact.

According to a third aspect of the present invention, in the second aspect of the invention, the guide portion is a groove or a protrusion formed in a direction in which the magnetic head slides on the recording medium, and the holding member has a magnetic member. Since the restricting portion that restricts the rotation range of the head is formed, the overall size of the magnetic head holding mechanism as described above can be further reduced.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing an embodiment of a magnetic head holding mechanism according to the present invention.

FIG. 2 is a plan view of the embodiment.

FIG. 3 is a right side view of the embodiment.

FIG. 4 is a left side view of the embodiment.

FIG. 5 is a side view of the azimuth adjusting mechanism in the embodiment.

FIG. 6 is a cross-sectional view of the azimuth adjusting mechanism of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support frame 2 Guide member 3 Feed screw 4 Guide part 5 Magnetic head 6 Holding member 12 Motor as a drive source 17 Recording medium 1a Guide groove 1c Guide groove 6d Hole as a regulation part 7b Projection as a regulation part

Claims (3)

(57) [Claims] 1. A method for recording and / or recording information by sliding on a recording medium.
Alternatively, in a magnetic head holding mechanism in which a magnetic head for reproducing is rotatably supported and urged to move in a direction in which the magnetic head slides on the recording medium, the magnetic head is rotated by a holding member attached to a support frame. A guide portion is formed in the support frame so as to engage with the holding member and guide the movement of the holding member. The direction in which the guide member guides the holding member is determined by the direction of the recording medium. A magnetic head holding mechanism which is set in a direction orthogonal to the magnetic head. 2. A support member and a feed screw are engaged so that the support frame is moved when the feed screw is rotationally driven by a driving source, and a guide member for guiding the movement of the support frame or the feed screw is provided. 2. The magnetic head holding mechanism according to claim 1, wherein the magnetic head holding mechanism is disposed at a position substantially coincident with an extension of the guide portion. 3. The guide section is a groove or a projection formed in a direction in which the magnetic head slides on the recording medium, and the holding member has a regulating section for regulating a rotation range of the magnetic head. 3. The magnetic head holding mechanism according to claim 2, wherein: