JPH0356917Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a head support mechanism for a magnetic card reader having magnetic heads on both sides of a card path.

[Prior art]

Conventionally, when a card having a magnetic stripe on only one side is run in the card passage of the magnetic card reader shown in FIG. When the tip of the head 15 comes into contact with the card, a large frictional force is applied from the beginning, and the force that moves the card and the resistance to friction are large.The thin leaf spring may vibrate due to the frictional force, causing a squealing sound. When vibration occurs, the vibration continues even while the card is being transported. As a countermeasure against this, a cloth tape 38 or the like is attached to the thin plate spring itself, and the resonance point of the thin plate spring is shifted to prevent the squealing sound from occurring.

Recently, magnetic cards having magnetic stripes on both sides have come into use, and in order to be able to read both sides of the magnetic card at the same time as shown in FIG. , 15 are now being used. In the case of this magnetic card reader/player, it can function even if the pressing force of the head against the card is small, so the frictional force between the card and the head is small, and even if vibration occurs, it is a relatively low-frequency sound, and there is a slight If the damper is fixed to something that vibrates, the prevention effect can be increased.

However, in the case of a writing machine, it is necessary to apply the magnetic head to the card with a pad pressure above a certain value. This patch pressure will be stronger than in the case of a regenerator. In this case, when the card is run, the frictional force is large and high-frequency vibrations are generated, and even if an attempt is made to shift the resonance point by pasting cloth tape or the like, the high-frequency vibrations have no effect.

[Purpose of invention]

In view of the above drawbacks, the present invention tilts at least one magnetic head with respect to the card surface in a plane perpendicular to the card advancing direction to reduce the contact area and frictional force between the magnetic head and the card when the card enters the card path. An object of the present invention is to propose a head support mechanism for a magnetic card reader that prevents vibrations caused by frictional force.

[Structure of the idea]

The present invention provides a magnetic card reader in which magnetic heads are arranged facing each other on both sides of a card passage.
At least one of the magnetic heads is arranged at an angle perpendicular to the direction in which the card advances before the card enters between the magnetic heads.

〔Example〕

The present invention will be explained below with reference to illustrated embodiments. The head support mechanism of the magnetic card reader is shown in FIGS. 1 and 2, in which upper and lower guide blocks 1 and 2 are fixed to a machine frame 10 with a plurality of screws 11 at predetermined intervals, and a card passage 12 is formed between the guide blocks. ing. Magnetic heads 1 are placed on both sides of the card passage 12, respectively.
3, 14 and 15 are arranged facing each other, and
As shown in the figure, magnetic heads 13, 14, and 15 are adhesively fixed to rigid head support members 3, 4, and 5 formed by bending the side portions of thin plates, respectively. The head support members 3, 4, 5 have small holes 3a, 4a at both ends, respectively.
5a is drilled and inserted into one end of the support plates 6, 7, 8 and pins 16, 17 with hemispherical protrusions provided on the guide blocks 1, 2, respectively, to swing the card 18 in a direction perpendicular to the running direction of the card 18, respectively. Supported for free movement.

One end of the spring 9 is attached to the L-shaped fixing plate 20 which is fixed to the lower guide block 2 with the screw 19.
The other ends 9a and 9b, which are fixed at 1 and divided into two, are formed in a U-shape and press on a line connecting the hemispherical convex pins 16 and 16 of one of the head support members 3 and 4, respectively. The magnetic heads 13 and 14 are biased toward the card passage 12 so that they can move forward and backward. A weight 22 is fixed to one of the head support members 3 as shown in FIG. It is placed at an angle.

The other head support member 5 has a hole through which a thick pin 23 fixed to the upper guide block 1 is inserted.
A coil spring 24 with a strong spring force that presses the spring so that it can only swing is fitted and held in place by a spring receiver 26 screwed with a screw 25 to prevent it from coming off.

One end of the support plate 6 is rotatably inserted through a pin 27 implanted in the guide block 2, and the other end to which the pin 16 with a hemispherical protrusion is fixed has a long hole for adjusting the skew track. is drilled. The eccentric portion of the eccentric pin 28 is inserted through this elongated hole. The support plate 6 is positioned and fixed by fixing the eccentric pin 28 to the guide block 2 with a screw 29.

The other support plates 7 and 8 mentioned above are the guide blocks 1 and 2.
They are held by screws 31 via collars 30 to pins implanted in the respective pins. The other ends of the support plates 7 and 8 are provided with elongated holes similar to those of the support plate 6, and the support plates 7 and 8 are fixed with screws 29 via eccentric pins 28.

When the eccentric pin 28 of the support plates 6, 7, and 8 is rotated, the support plate 6 is rotated around the pin 27, and the support plates 7 and 8 are rotated around the pin on which the collar 30 is fitted. . This rotation causes the magnetic heads 13,1
The skew and track positions of 4 and 15 are adjusted, and after adjustment the support plates 6, 7 and 8 are fixed by screwing the collar 30 and the eccentric pin 28.

The tip of the magnetic head 15 and the magnetic head 13,
14 is narrower than the thickness of the card 18 before the card is inserted because the magnetic heads 13 and 14 are urged to protrude toward the card path 12 by the spring 9, and the magnetic head 13 is tilted by an angle θ. ing. Further, the distance between the magnetic head 15 and the wall surface of the card path facing the head is set to be slightly wider than the card thickness.

The card 18 is attached to the magnetic heads 13, 14, 15.
When passing between the cards, the magnetic heads 13 and 14, which are urged by a relatively weak spring 9, retreat against this urging force, press the card 18 and apply a predetermined pressure to the heads, and the strong coil spring 24 The magnetic head 15 whose retracted position has been regulated by The structure is designed to improve adhesion to the surface. and head support member 3
The magnetic head 13 is tilted by an angle θ by the weight 22, and the card 18 and the magnetic head 1 are tilted at an angle θ by the weight 22.
Since the contact area 3 is smaller, the frictional force between the magnetic head and the card is smaller, making it difficult for high frequency vibrations to occur in the magnetic head. The amount by which the magnetic heads 13 and 14 protrude into the card path 12 is adjusted by the thickness and number of protrusion adjusting washers 32 inserted through the hemispherical convex pin 16. Further, printed circuit boards 33, 33 are fixed to the outside of the guide blocks 1, 2, respectively, with screws 34.

When the head support mechanism of the magnetic card reader is configured as described above and the card 18 is inserted into the card passage 12, the head support member 3 and the magnetic head 13
Since the card 18 and the magnetic head 13 are tilted at an angle θ, the contact area between the card 18 and the magnetic head 13 is initially small and the frictional force is small, as shown in FIG.
Since the card 3 is swung and brought into close contact with the rear card 18, vibrations are less likely to occur. When the card 18 is being transported and passing between the magnetic heads 13, 14, and 15, the magnetic head is able to swing and move forward and backward as described above, so that it can follow the card surface and perform good reading and writing. This eliminates unpleasant low-frequency vibrations and at the same time prevents abnormal card conveyance due to high-frequency vibrations, thereby improving the writing accuracy and reading ability of the card.

The magnetic head 14 in the above description may also be tilted to the right or left at the angle θ in FIG.

FIG. 6 shows that when the head support member 3 and the magnetic head 13 are tilted at an angle θ by the coil spring 35 stretched between the machine frame 10 and the head support member 3, and the card is inserted between the magnetic heads 13 and 15, the magnetic head 13 This is another embodiment configured so that the contact area between the card and the card is reduced.

[Effect of idea]

In this invention, at least one of the magnetic heads facing each other on both sides of the card path is arranged at an angle with respect to the card surface in a plane perpendicular to the direction of card movement, thereby reducing the contact area when a card enters between the magnetic heads. Since the generation of vibrations is prevented, it is possible to provide a head support mechanism for a magnetic card reader that has excellent practical effects such as improved writing accuracy and improved reading ability.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, and FIG. 1 is a sectional rear view of the main part of a magnetic card reader, FIG. 2 is a sectional side view of the same, FIG. 3 is a plan view, FIG. 4 is a bottom view, and FIG.
The figure is a side view of the main part of a card inserted between the magnetic heads, Fig. 6 is a cross-sectional rear view of the main part of another embodiment of the support mechanism in which the head support member and the magnetic head are tilted, and Fig. 7 is a conventional one-sided view. Figure 8 is a cross-sectional side view of the main part of a magnetic card reader with magnetic heads installed only on both sides, with vibration prevention applied. FIG. 3 is a sectional front view of main parts. 12...Card passage, 13, 14, 15...Magnetic head, 18...Card.

Claims (1)

[Scope of utility model registration request] In a magnetic card reader in which magnetic heads are arranged facing each other on both sides of a card passage, at least one of the magnetic heads is placed against the card surface in a state before the card enters between the magnetic heads. A head support mechanism for a magnetic card reader, characterized in that the head support mechanism is tilted and swingable in a plane perpendicular to a card advancing direction, is supported so as to be movable forward and backward, and is biased toward the card passage side by a spring.