JPH0335559Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention mainly relates to the technical field of small portable thermal printers.

(Prior art) In the past, a plurality of pinch rollers were attached to a single linear pinch roller shaft.
The pinch roller shaft was constructed using a plurality of support members so that the pinch roller shaft and the platen were parallel to each other.

However, it has a drawback that it is difficult to maintain parallelism even though a plurality of support members are used.

(Technical Problem) The present invention was developed in view of the shortcomings of the prior art, and the technical problem is to easily and reliably achieve parallelism between the pinch roller shaft and the platen at a low cost. That is.

(Technical means) In order to solve the above-mentioned technical problem, the present invention uses a metal U-shaped pinch roller shaft 1.
A plurality of pinch rollers 3 are attached to one side part 2, and the other side part 4 is supported on a bearing part 5 so as to be rotatable in an angular manner, and one side part 2 of the pinch roller shaft 1 is connected to a platen 6 by a spring 5A. The platen 6 and the pinch roller shaft 1 are attached to the side.
It is designed to improve parallelism with the

Specifically, as shown in the embodiment shown in the drawings (FIGS. 1 to 3), the configuration is as follows.

One side 2 and the other side 4 of the above-mentioned U-shaped pinch roller shaft 1 are formed parallel to each other with a distance 1 maintained therebetween to prevent the pinch roller shaft 1 from being curved or bent.

The bearing portion 5 described above is integrally molded into a part of the synthetic resin case 8 that forms the printer main body 7.

Further, the winding base 9 of the spring 5A described above is attached to the other side 4 of the pinch roller shaft 1, and its tip 10 is brought into pressure contact with the one side 2, and by the urging force of the spring 5A in the direction of the arrow A. The pinch roller shaft 1 is rotated in the same direction at an eccentric angle about the bearing portion 5 to bring the pinch roller 3 into pressure contact with the platen 6.

11 is a support plate that prevents the pinch roller shaft 1 from falling or coming off.

Reference numeral 12 denotes a hinge portion which presses the support plate 11 onto the pinch roller shaft 1 via a spring (not shown).

Reference numeral 13 denotes a push-push type switch, which presses an operation button member 14 made of synthetic resin attached thereto in the direction of arrow B, and moves one side 2 of the pinch roller shaft 1 in the direction of arrow C via the operation end 15. The pinch roller 3 is pressed against or separated from the platen 2 by rotating the pressing angle.

In the push/pull type switch 13, the operation button member 14 is lowered from the upper position to the lower position by the first press and held at the lower position, and released from the lower position by the second press and returned to the upper position. It performs the action of returning to .

15 is recording paper. 16 is the printer body 7
17 is a bail cover; 18 is a bottom cover of the printer body 7; 19 is a printer bed body; when the screw shaft 20 rotates, the screw shaft 20
It is designed to move horizontally on the top.

(effect) The above technical means works as follows.

When inserting the recording paper 15A, first move the operation button member 14 of the push-button switch 13 to arrow B.
push in the direction.

At this time, the operation button member 14 is stopped and held from the upper position to the lower position.

At this time, the operating end 15 presses one side 2 of the pinch roller shaft 1, causing the pinch roller 3 to move away from the platen 6.

Next, after inserting the recording paper 15A between the pinch roller 3 and the platen 6, the operation button member 14 is pushed again in the direction of arrow B, and when the user releases the hand, the operation button member 14 returns to the upper position.

Along with this operation, the operating end 15 also moves to the upper position, so the pinch roller shaft 1 rotates in the direction of arrow A using the bearing 5 as a fulcrum, and the pinch roller 3 pinches the recording paper 15A. It comes into pressure contact with the platen 6.

(Effects) The present invention has the following unique effects.

By employing the U-shaped pinch roller shaft 1, its declination rotation can be performed smoothly, and the parallelism between the one side portion 2 and the other side portion 4 can be maintained, so that the relationship between the one side portion 2 and the platen 6 can be maintained. It has the advantage of being able to maintain good parallelism.

[Brief explanation of the drawing]

Figure 1 is an overall exploded perspective view of the printer according to the present invention, Figure 2 is a bottom view of the printer body, and Figure 3 is a bottom view of the printer body.
The figure is a left side view of the printer main body. 1... Pinch roller shaft, 2... One side part, 3... Pinch roller, 4... Other side part, 5...
... Bearing section, 6 ... Platen, 7 ... Printer body.

Claims (1)

[Scope of utility model registration request] A pinch roller 3 is attached to one side 2 of a U-shaped pinch roller shaft 1 that maintains parallelism, and the other side 4 is supported by a bearing 5 so as to be rotatable at an angular angle. The one side portion 2 of the shaft 1 is made to be biased toward the platen 6 side,
A printer designed to maintain parallelism between the platen 6 and one side 2.