JP2592737Y2 - Magnetic card reader - 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 card reader for reading information from a magnetic card or writing information to a magnetic card.

[0002]

2. Description of the Related Art A magnetic card reader in which two magnetic heads are arranged on both sides of a path of a magnetic card and separated from each other in a traveling direction of the magnetic card within a range shorter than an invalid recording length of an information recording section of the magnetic card. A manual magnetic card reader in which two magnetic heads are arranged on both sides of a magnetic card path so as to shift the position with respect to the running direction of the magnetic card so that information of the magnetic card is reproduced in ascending order of magnetic recording density. Well known.

[0003]

In the above-described magnetic card reader, the strength of the urging force of the urging means for urging the two magnetic heads is not specified. When the biasing force is weaker than or equal to that of the magnetic head at the back of the card passage, the magnetic head at the back of the card passage is used to read the information of the magnetic card with the magnetic head at the card entrance. Is hit by a magnetic card .
There is a problem that the information reading jitter is abnormally large and malfunctions.

[0004] The present invention, when that reads the information of the magnetic card at the card inlet side of the magnetic head, even if hit by a magnetic card on the back side of the magnetic head of the card path, reading
Signal to a specified level or less.
It is an object of the present invention to prevent a magnetic card reader from malfunctioning due to a magnetic card reader .

[0005]

According to the present invention, there is provided a magnetic card reader in which a magnetic head is made to face a card path and a magnetic card slides on the magnetic head to read or write information. The magnetic head at the card entrance side is used as a read magnetic head, and the two magnetic heads are respectively advanced and urged toward the card passage by the urging means. A magnetic card reader wherein the urging state of the urging means is set so that the pressure contact force with the magnetic card is large in the magnetic head on the card entrance side.

[0006]

The magnetic card inserted into the card passage is arranged at the card entrance side, and reads the information of the magnetic card while sliding on the magnetic head urged toward the card passage by a predetermined pressure. Next, when the magnetic card is urged with a pressing force smaller than a predetermined pressing force and slides on a magnetic head disposed on the back side of the card passage, the magnetic card at the entrance side is
The jitter generated in the read signal is kept below a predetermined level due to the difference between the pressures applied to the magnetic heads, and the magnetic card reader operates normally.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a card passage of a manual magnetic card reader through which a card C passes. The card passage 1 is composed of an upper plate 2, an upper plate 2 and a card C
Bottom plate 3 arranged in parallel with a space wider than the thickness of
And formed.

[0008] Magnetic heads 4 and 5 are arranged at appropriate positions in the card path 1 so as to face the card path 1 with their positions shifted in the card running direction X. Since the magnetic heads 4 and 5 are supported by similar support means, the support means will be described as a representative of the magnetic head 4. The magnetic head 4 is for reading, and is held by a contact member 6 of a support member made of a single metal plate as shown in FIGS. The hitting member 6 forms a holding portion 7 by bending the opposite side edge of the window hole 6a, and adheres and supports both side surfaces 4a of the magnetic head 4 inserted into the window hole 6a to the holding portion 7. Hit member 6
A substantially V-shaped fulcrum 8 projecting toward the card passage 1 is formed before and after the magnetic card C in the traveling direction. The magnetic head 4 has a biasing spring 9 as a biasing means at the rear end 4b.
Urged toward the card passage 1 side. The urging spring 9 is fixed to the upper plate 2 and has a window hole 9a into which the magnetic head 4 is fitted, a contact portion 9c abutting on the rear end 4b of the magnetic head 4, and a magnetic head 4 with respect to the contact portion 9c. To the card passage 1 side. Magnetic head 4
Of the magnetic head 4 is prevented from excessively protruding into the card passage 1 by abutting the fulcrum 8 against the periphery of the window 9a of the biasing spring 9. The magnetic head 4 is supported so as to be pivotable about an axis parallel to the traveling direction of the magnetic card C with the fulcrum 8 as a pivot.

The magnetic head 5 is also supported by a contact member having the same structure as that of the magnetic head 4. The magnetic head 5
When the rear end 5b is pressed by the biasing spring 19, the head surface is biased so as to protrude into the card passage. When the magnetic card C runs, the magnetic heads 4 and 5 are pushed by the card C and retreat from the card path 1 against the respective urging means.

The urging spring 9 is larger than the urging force of the urging spring 19 so that the pressing force between the magnetic head 4 and the magnetic card C is larger than the pressing force between the magnetic head 5 and the magnetic card C. Is used.

Next, the operation of the magnetic card reader will be described. When the magnetic card C is manually inserted into the card path 1 and moved in the traveling direction X, the magnetic card C
Starts reading information from the magnetic card C while sliding on the magnetic head 4. When the magnetic card C further advances and the leading end of the card reaches the magnetic head 5, the running speed of the magnetic card changes. However, as described above, the urging spring 9 presses the magnetic head 4 and the magnetic card C against each other. Since a force larger than the urging force of the urging spring 19 is used so that the force is larger than the pressure contact force between the magnetic head 5 and the magnetic card C, the speed fluctuation is small, and the signal generated in the read signal is smaller. The shutter is kept almost normally below a predetermined level, so that the information on the magnetic card can be read accurately.

In this embodiment, the magnetic heads 4,
The magnetic heads 5 are arranged so as to face each other while being shifted in the running direction of the magnetic card C, but the magnetic heads 4 and 5 are arranged on the upper plate 2 so as to be shifted in the running direction of the magnetic card C as shown in FIG. The present invention can be applied to a motor-driven magnetic card reader.

[0013]

[Effects of the Invention] As described above, according to the present invention,
When reading information from the magnetic card with the magnetic head on the card entrance side, even if the magnetic card hits the magnetic head on the back side of the card passage, malfunction due to jitter failure can be prevented.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a magnetic head of a magnetic card reader showing one embodiment of the present invention.

FIG. 2 is a side sectional view of the magnetic head shown in FIG. 1;

FIG. 3 is a front sectional view showing a magnetic head of a magnetic card reader according to a modification of the present invention.

[Explanation of symbols]

 1 card path 2 top plate 3 bottom plate 4,5 magnetic head 6 degree contact member 9,19付 Urging spring C as urging means ‥‥‥‥‥‥ Magnetic card

Claims (1)

(57) [Scope of request for utility model registration] 1. A magnetic card reader for reading or writing information by causing a magnetic head to face a card passage and sliding the magnetic card into contact with the magnetic head, wherein two magnetic heads are shifted in position in the card running direction. The magnetic head on the card entrance side is used as a read magnetic head, and the two magnetic heads are respectively advanced and urged toward the card passage side by urging means, and the pressure contact force between the magnetic head and the magnetic card is increased by the card entrance. A biasing state of the biasing means is set to be large in the magnetic head on the side of the magnetic card reader.