JPS6220926Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a magnetic card in which a frame body having a long card running groove is molded from synthetic resin, and a long strip-shaped metal plate is attached to the bottom of the running groove, which serves as a card running reference surface. This improves the frame structure of the reader to prevent deformation and lifting of the metal plate.

The present applicant had previously proposed a method in which a metal plate is insert-molded at the bottom of the card running groove in a synthetic resin frame (Utility Application No. 123611/1983), which has improved the accuracy of positioning of the reference plane, wear resistance, reinforcement, It was put into practical use due to its sliding properties and other effects.

However, metals and resins have different shrinkage rates during molding and large differences in expansion rates, so accidents such as warping of metal plates, buckling, and cracking of frames occur during molding and use, causing track errors and skew errors. Summer. Especially these days, the card running groove is often made 2 to 3 times longer than the card length for stability of operation.
When the length is increased in this way, the above-mentioned drawbacks occur significantly, which poses a problem for practical use.

The present invention was proposed in view of this point, in which a long strip-shaped metal plate is press-fitted into the bottom of the running groove of the frame body only in the vicinity of the magnetic head, and the lifting prevention means for the end of the metal plate is fixed to the frame body. The metal plate is provided between the body and the metal plate, and the metal plate and frame are configured to allow misalignment at the end of the running groove, thereby maintaining the positional accuracy of the metal plate as a reference surface and preventing buckling and lifting. This prevents the cracking of the frame and the cracking of the frame.

An embodiment of the present invention will be described below with reference to the drawings. A frame 1 having an elongated card running groove 11 is molded with synthetic resin, and rectangular shapes are formed near both ends of the groove bottom 12, which serves as a card running reference surface. Holes 13 and 14 are bored. 15 is a hole through which the magnetic head 3 enters.

On the other hand, the long strip-shaped metal plate 2 has bent pieces 21 and 2 at both ends.
2. An intermediate press-fit locking protrusion 23 is integrally provided so as to be located near the hole 15, and the protrusion 23 is wider than the groove width L, and the other elongated portion is approximately the same width as the groove width L. Or it's a little narrow. The thickness of plate 2 is 0.1~0.2
It may be about mm, but it does not matter if it is thick. Then, insert the metal plate 2 into the running groove 11 as shown in FIG.
The metal plate 2 is fixed along the groove bottom 12, and the bent pieces 21 and 22 are passed through the holes 13 and 14 and bent into a U-shape as shown in the figure, and the metal plate 2 is attached to the frame body. 1 is engaged. This engagement is achieved by allowing the bent pieces 21 and 22 to move in the card running direction (both forward and backward directions) through the holes 13 and 14, and by bending them into a U-shaped hook shape. It is made so that it does not float up.

Therefore, according to this configuration, since the metal plate 2 is fitted after the frame body 1 is molded, accidents during molding such as insert molding can be prevented, and the frame body 1 and the metal plate 2 are locked to the side of the magnetic head 3. Since it is carried out only at one point, the operating temperature conditions (e.g. -10° to +40°C)
Since the displacement between the frame 11 and the metal plate 2 is allowed at the engaging portion and the metal plate 2 does not rise, the metal plate 2 is not deformed and a highly accurate card running reference plane can be ensured. In particular, since this locking is performed near the magnetic head 3, where dimensional accuracy is most required, the track, skew, and jitter functions are reliably satisfied, and a magnetic card reader with stable recording and reproducing properties can be obtained. In the above example, if the metal plate and the frame are bonded with an elastic adhesive that does not harden in the bonded state, lifting can be prevented while allowing displacement, increasing the strength of the locking, and improving prevention of lifting at both ends of the plate. .

Therefore, in this case, the effects of the present invention can be achieved even without providing a bent piece. Further, both ends of the metal plate may be formed into an L-shape so as to face the end of the frame, and the engaging portion may be provided only on the card running start end side.

Furthermore, the metal plate is not limited to only one locking portion, but even if it is provided at several locations in the middle (near the center), the purpose will still be achieved as long as both ends are not locked.

[Brief description of the drawings]

FIG. 1 shows an exploded and assembled view of an embodiment of the present invention, and FIG. 2 shows a front view, in which 1 is a synthetic resin frame, 2 is a metal plate, and 3 is a magnetic head.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A long card running groove is formed in a synthetic resin frame, a magnetic head is made to face the running groove, the bottom of the running groove is used as a card running reference surface, and a magnetic card is manufactured. In a magnetic card reader that sends and receives information through sliding contact with a magnetic head, a long strip-shaped metal plate with a press-fit locking protrusion formed in a position near the magnetic head is press-fitted into the groove bottom to form a protrusion. The card is fixed to the frame body, and a means for preventing the edge of the metal plate from lifting up is provided between the frame body and the metal plate, allowing for deviation of the card from the frame body in the running direction of the card at the edge side of the metal plate. Frame structure of a magnetic card reader. (2) The frame structure according to claim 1, which is a utility model registration claim, in which a metal plate is elastically bonded to the bottom of the groove as a lifting prevention means. (3) Utility model registration claim No. 1 in which the frame is provided with an engaging part with the end of the metal plate, the end of the metal plate is bent into a hook shape, and the end is engaged with the frame with a margin in the card running direction. , the frame structure according to item 2.