JPH0421159Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a touch roller mechanism that supports a touch roller for bringing a recording medium into close contact with the head surface of a magnetic head in a card reader.

[Conventional technology]

FIG. 3 shows a schematic configuration of a touch roller mechanism in a card reader. A card-shaped recording medium 2 fed through a recording medium transport path 1 is elastically pressed against the magnetic surface of a magnetic head 3 by a touch roller 4. Data is read by the magnetic head 3.

The touch roller 4 is rotatably supported by a roller support member 6. On the other hand, a rotating member 8 is rotatably supported on the support shaft 7 . This rotating member 8 is provided with a pair of bent pieces 9, between which the roller support member 6 is slidably supported. The roller support member 6 is fastened and fixed to the rotating member 8 with two screws 10. Further, the rotating member 8 is biased to rotate in the direction of pressing the touch roller 4 against the magnetic head 3 by a spring 11 attached to the support shaft 7.

Therefore, the plane including the center line of the head surface of the magnetic head 3 and the center axis of the touch roller 4 is made perpendicular to the recording medium transport path 1, that is, the touch roller 4 is made to touch the center of the head surface of the magnetic head 3. When making adjustments for
0 to slide the roller support member 6, and when the positional relationship of the touch roller 4 with respect to the magnetic head 3 is appropriate, tighten both screws 10. It is also necessary to make contact with the head surface of the magnetic head 3 with uniform contact pressure over the entire width of the touch roller 4, but adjustment for this requires adjusting the overlapping portion of the roller support member 6 and rotation member 8. This is done by pinching them with tools and twisting them around the support shaft 7.

[Problem that the invention attempts to solve]

In the conventional touch roller mechanism as described above, the positioning accuracy of the roller support member 6 with respect to the rotation member 8 is improved due to the backlash that exists between the roller support member 6 and the bent piece 9 provided on the rotation member 8. This has the disadvantage that the positioning accuracy of the touch roller 4 with respect to the magnetic head 3 becomes worse.

Moreover, the adjustment for bringing the touch roller 4 into contact with the head surface of the magnetic head 3 over its entire width with uniform contact pressure is achieved by pinching the overlapping portion of the roller support member 6 and the rotating member 8 with a tool, and then pressing the roller 4 with a tool. This is done by twisting around the spindle 7, so
The bending piece 9 is deformed and the play between the roller support member 6 and the bending piece 9 is further increased, resulting in a problem that the positioning accuracy of the touch roller 4 with respect to the magnetic head 3 becomes worse.

The present invention was devised to solve these problems, and its purpose is to improve the positioning accuracy of the roller support member and, in turn, to improve the positioning accuracy of the Tatchi roller with respect to the magnetic head, and to improve the positioning accuracy of the Tatchi roller with respect to the magnetic head. It is an object of the present invention to provide a touch roller mechanism of a card reader that can easily adjust the contact pressure against the head to be uniform over the entire width of the touch roller.

[Means for solving problems]

The touch roller mechanism of the present invention rotatably supports the touch roller in a card reader in which a card-shaped recording medium fed through a recording medium conveyance path is pressed against a magnetic head by a touch roller, and data is read by the magnetic head. a roller support member; the roller support member is rotatably supported at a position on a plane including the rotation axis of the touch roller and substantially perpendicular to the recording medium conveyance path;
a rotating member that is pivotally supported by a support shaft and is rotatable in a direction to move the touch roller toward and away from the magnetic head;
a spring member that biases the rotating member to rotate in a direction that brings the touch roller into pressure contact with the magnetic head;
The relative positional relationship between the rotary member and the roller support member is adjustable such that a plane including the center line of the head surface of the magnetic head and the center axis of the touch roller is perpendicular to the recording medium transport path, and The roller support member is characterized by comprising an adjustment and fixing mechanism for fixing the roller support member to the rotating member.

[Effect]

In the above configuration, when adjusting the position of the touch roller so that it touches the center of the head surface of the magnetic head, the roller support member is fixed by releasing the fixation between the roller support member and the rotating member by the adjustment and fixing mechanism. Rotates relative to the member. Once the positional relationship of the touch roller with respect to the magnetic head is appropriate, the roller support member is fixed with respect to the rotating member by the adjusting and fixing mechanism.

Further, adjustment so that the touch roller contacts the head surface of the magnetic head with uniform contact pressure over its entire width is performed by twisting the rotating member about the support shaft. These two types of adjustments can be performed independently without buffering each other.

〔Example〕

An embodiment of the present invention is shown in FIGS. 1 and 2.

FIG. 1 shows a schematic configuration of a touch roller mechanism in a card reader, and the same parts as in FIG. 3 are designated by the same reference numerals.

A card-shaped recording medium 2 fed through a recording medium conveyance path 1 is transferred to a magnetic head 3 and a touch roller 4.
The touch roller 4 presses the data elastically against the magnetic head 3, and the magnetic head 3 reads the data.

The touch roller 4 is rotatably supported by a roller support member 16.

On the other hand, a rotating member 18 is rotatably supported on the support shaft 17, and the roller support member 16 is rotatably supported on the rotating member 18 via a tightening screw 19. The position of this tightening screw 19 is determined by the position of the recording medium transport path 1 including the rotating shaft of the touch roller 4.
It is set on a plane 20 that is substantially perpendicular to .

Further, the roller support member 16 is tightened and fixed to the rotating member 18 by another tightening screw 21. This other tightening screw 21 is inserted through a screw insertion hole provided in the roller support member 16 and the rotation member 18. At least one of the screw insertion holes provided in the screw insertion hole is an arcuate long hole having the tightening screw 19 as the center of curvature. Further, the roller support member 16 and the rotating member 18 are provided with bent pieces 22 and 23, respectively, and both bent pieces 22 and 23 are positioned substantially parallel to each other. and rotating member 18
The bent piece 23 of the roller support member 16 is provided with a through hole into which the adjusting screw 24 is rotatably inserted, and the bent piece 22 of the roller support member 16 is provided with a threaded hole into which the adjusting screw 24 is screwed. 19, 21 and the adjusting screw 24 constitute an adjusting and fixing mechanism 25.

The rotating member 18 is a spring 2 attached to the support shaft 17.
6, the touch roller 4 is rotationally biased in the direction of pressing it against the head surface of the magnetic head 3.

In the above configuration, the two tightening screws 19, 21
When the adjustment screw 24 is rotated with a tool in a state in which the adjustment screw 24 is loosened, the roller support member 16 rotates around one of the tightening screws 19, and the touch roller 4 moves toward the recording medium as shown by the imaginary line in FIG. The touch roller 4 moves approximately parallel to the supply path 1 so that the plane including the center line of the head surface of the magnetic head 3 and the center axis of the touch roller 4 is orthogonal to the recording medium supply path 1, that is, the touch roller 4 moves toward the magnetic head. It can be adjusted so that it touches the center of the head surface of No. 3. After the positional relationship of the touch roller 4 with respect to the magnetic head 3 has been made appropriate in this way, when both the tightening screws 19 and 21 are tightened, the roller support member 16 is tightened.
is fixed to the rotating member 18 again.

In addition, by holding the base end of the rotating member 18 near the spindle 17 with a tool or the like and twisting this portion around the spindle 17, the touch roller 4 can be moved over its entire width to the head surface of the magnetic head 3. Adjustments can also be made to ensure equal contact pressure.

Therefore, according to the above configuration, since the attachment structure of the roller support member 16 to the rotating member 18 is a freely rotatable attachment structure using a shaft, both members 1
"Backlash" is unlikely to occur between 6th and 18th. Therefore, the positioning accuracy of the roller support member 16 with respect to the rotating member 18 is improved, and as a result, the positional relationship of the touch roller 4 with respect to the magnetic head 4 is also determined with high precision.

Further, adjustment to bring the touch roller 4 into contact with the head surface of the magnetic head 3 with uniform contact pressure over its entire width can be easily performed by simply twisting the rotating member 18. “Backlash” between the support member 16 and the rotating member 18
There is no risk of increasing the

[Effect of idea]

As described in detail above, according to the present invention, it is possible to improve the positioning accuracy of the roller support member and, in turn, improve the positioning accuracy of the touch roller with respect to the magnetic head, and to apply contact pressure of the touch roller to the magnetic head over the entire width. It is possible to provide a touch roller mechanism of a card reader that can be easily adjusted to make the temperature uniform.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of a touch roller mechanism showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of position adjustment of the touch roller with respect to a magnetic head in the same embodiment, and FIG. 3 is a schematic diagram of a touch roller mechanism showing a conventional example. FIG. 1... Recording medium transport path, 2... Recording medium, 3...
...Magnetic head, 4...Touch roller, 5...Reading section, 16...Roller support member, 17...Spindle,
18... Rotating member, 19, 21... Tightening screw,
24...Adjustment screw, 25...Adjustment fixing mechanism, 26
...Spring.

Claims (1)

[Scope of utility model registration request] In a card reader that presses a card-shaped recording medium supplied through a recording medium conveyance path to a magnetic head by a touch roller and reads data by the magnetic head: a roller support member that rotatably supports the touch roller; the roller; The roller support member is rotatably supported so that the surface of the support member that is in pressure contact with the magnetic head of the touch roller and the surface that includes the center of the rotating shaft of the touch roller is substantially orthogonal to the recording medium transport path, and the touch roller is attached to the magnetic head. a rotating member that is rotatably supported in a direction to move the magnetic head toward and away from the magnetic head; a spring member that rotationally urges the rotating member to move the touch roller toward the magnetic head; and a center of the head surface of the magnetic head. The relative positional relationship between the rotating member and the roller supporting member can be adjusted such that a plane including the line and the central axis of the touch roller is perpendicular to the recording medium transport path, and the roller supporting member is rotated in the rotating direction. A tatsuchi roller support mechanism for a card reader, comprising an adjustment and fixing mechanism fixed to a member.