JPH0423657Y2 - - Google Patents

Description

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

(Prior art) In the past, in order to release the pinch roller that presses against the platen when inserting recording paper, a lever protruding from the right side of the printer body was rotated in the front and back direction. I was knocking it down and walking away.

Therefore, in the case of a small portable printer body, it is necessary to hold the printer body with the left hand and push down the lever with the right hand, which is cumbersome and requires both hands.

In addition, the lever, which has been pushed down once, must be pulled forward again to press the released platen and pinch roller again, resulting in poor operability. (No particular literature available) (Technical problem) The present invention was developed in view of the shortcomings of the prior art, and aims to easily and reliably press and release the platen and the pinch roller using a push button operation. This is a technical issue.

(Technical Means) In order to solve the above-mentioned technical problem, the present invention has a push-push type switch 1 in the vertical direction.
Pinch roller 3 against platen 2 by pressing
Pressure contact and separation are performed with one touch, and the recording paper 4 can be easily inserted and pulled out.

Specifically, as shown in the embodiments shown in the drawings (FIGS. 1 to 8), the configuration is as follows.

The push-push type switch 1 described above is disposed on one side of the printer body 5 so as to be pressed vertically. 6 is a synthetic resin operating button member attached to the operating rod 7 of the push/pull switch 1, and its operating end 8 is attached to a U-shaped pinch roller shaft 9 as shown in FIGS. 4 and 5. Some parts are pressed against each other.

The pinch roller 3 described above is mounted on a pinch roller shaft 9 as shown in FIG. 5, and is normally pressed against the platen 2.

Reference numeral 10 denotes a bearing for the pinch roller shaft 9, and by the biasing force of a pressure contact spring 11, an acting force is constantly applied in the direction of arrow A in FIG. It has been completed.

Reference numeral 12 denotes a holding member for the pinch roller shaft 9, which prevents it from falling or coming off.

Therefore, when the operating rod 7 of the push-pull switch 1 is not pushed in, that is, in the upper position, the pinch roller shaft 9 is deflected in the direction of arrow A with the bearing 10 as a fulcrum, and the pinch roller 3
is pressed against the platen 2. Therefore, the recording paper 4 cannot be inserted, and the recording paper 4 that has already been inserted is appropriately held between the platen 2 and the pinch roller 3.

In addition, the above-mentioned push-button switch 1
When the operating rod 7 is pushed in the direction of arrow B and is in the lower position, the operating end 8 of the operating button member 6 presses a part of the pinch roller shaft 9 in the same direction. is bearing 1
The pinch roller 3 is rotated in the direction of the arrow C using the fulcrum 0 as a fulcrum, and the pinch roller 3 is separated from the platen 2.

Next, an outline of the push-pull switch 1 will be explained.

Reference numeral 13 denotes a frame that constitutes a part of the push-pull type switch 1, which houses an operating rod 7 that moves in the vertical direction, and is normally engaged (not shown).
The operating force is biased in the direction of arrow D, and the operating rod 7 is placed in the upper position.

14 is a locking rod protruding from the operating rod 7;
It protrudes from the window 15. 16 is frame 1
Support shaft 1 with the stop lever member attached to the outside of 3.
7 as a fulcrum, and normally rotates in the direction of arrow E due to the force of the spring 18, and the upper part 20 of the stop part 19 is rotated in the direction of the arrow E.
4. 21 is a lower part of the stop part 19, and 22 is a cut and raised part.

When the operating rod 7 is pushed in the direction of the arrow B, the locking rod 14 presses the stop part 19, so the stop lever member 16 rotates in the direction of the arrow F with the support shaft 17 as a fulcrum. When the locking rod 14 is allowed to move in the direction of arrow B and the pressing force in the direction of arrow B is released, the stop lever member 16 is again rotated in the direction of arrow E by the acting force of the spring 18. .

Therefore, the locking rod 14 comes into pressure contact with the lower part 21 and the cut-and-raised part 22 of the stop part 19, and upward movement is restricted and the locking rod 14 is held at the lower position. When the operating rod 7 is further pressed in the direction of arrow B, the locking rod 14
is removed from the lower part 21 and the cut and raised part 22, so the stop lever member 16 is deviated in the direction of arrow E.

Next, when the pressing force on the operating rod 7 is released, the locking rod 14 passes through the back side of the cut and raised portion 22 in the direction of arrow D, and the operating rod 7 returns to the upper position.

At this time, the stop lever member 16 is lifted in the direction of arrow G, that is, toward the front, using the support shaft 17 as a fulcrum.

Reference numeral 23 denotes a switch portion attached to the frame 13, which is connected to the switch rod 24 in relation to the position of the locking rod 14 of the operating rod 7.

That is, when the operating rod 7 is in the upper position, the switch rod 24 contacts the terminal P, turning on the electric circuit 25, and when the operating rod 7 is pushed in and in the lower position, the switch rod 24 contacts the terminal P. It separates and contacts the terminal Q to turn off the electric circuit 25. 26 is a display member such as a liquid crystal display element (LCD) or a fluorescent display tube (VFD).

Reference numeral 27 denotes an upper lid of the printer main body 5, 28 a bail cover, 29 a screw shaft, and 30 a printer bed main body which is configured to move in the left-right direction on the screw shaft 29.

31 is a bottom cover of the printer main body 5.

(effect) The above technical means works as follows.

When inserting the recording paper 4, first push the operation button member 6 of the push-button switch 1 in the direction of arrow B.

At this time, the operating rod 7 also moves in the direction of arrow B, and the locking rod 14 comes into pressure contact with the lower part 21 and cut-and-raised part 22 of the stop part 19, and the operating rod 7 is held at the lower position rather than the upper position. .

On the other hand, the operating end portion 8 of the operating button member 6 presses a part of the pinch roller shaft 9, and the pinch roller 3
is moved away from platen 2.

On the other hand, the electric circuit 25 is opened and the display member 26 is turned off.

Therefore, it can be visually confirmed that the pinch roller 3 and the platen 2 are separated from each other.

Next, after inserting the recording paper 4 between the pinch roller 3 and the platen 2, the operating button member 6 is again pushed in the direction of arrow B and released, and the operating rod 7 returns to the direction of arrow D, that is, to the upper position.

The operation end 8 of the operation button member 6 is integrated with this operation.
Since the pinch roller shaft 9 moves to the upper stage position, the pinch roller shaft 9 rotates in the direction of the arrow A about the bearing 10, and the pinch roller 3 comes into pressure contact with the platen 2 with the recording paper 4 in between.

At that time, the electric circuit 25 is closed and the display member 26
is lit.

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

(a) The first push of the operating rod causes the pinch roller and platen to separate, and this state can be maintained even after the push is released, so inserting or pulling out the recording paper, adjusting the position, etc. can be done calmly and slowly. It can be done.

Further, by the second push-release, the pinch roller and the platen are brought into pressure contact and the recording paper can be sandwiched.

(b) A stop lever member 16 having a stop portion 19 and a cut-and-raised portion 22 is supported by a shaft support 17 so as to be able to rotate and lift forward, and the locking rod 14 is pushed in by the first push of the operating rod 7. Stop part 1
9 and the lower part 21 and the cut and raised part 22, and when the locking rod 14 is pressed and released for the second time, the locking rod 14 passes through the back side of the cut and raised part 22 and returns to its original position. 7 can be operated smoothly even in a narrow space, and can be incorporated into a narrow space, contributing to miniaturization and compactness of printers.

[Brief explanation of the drawing]

Figure 1 is an exploded perspective view of the entire printer according to the present invention, Figure 2 is a plan view of the printer body, Figure 3 is a front view of the printer body, and Figure 4 is the printer body equipped with a push/pull switch. Figure 5 is a bottom view of the printer body, Figure 6 is a side view of the push-pull switch, Figure 7 is an enlarged perspective view of the stop lever member, Figure 8 is the push-pull switch. FIG. 3 is a schematic diagram showing the relationship with an electric circuit. 1... Push-pull switch, 2...
Platen, 3...pinch roller, 5...printer body, 9...pinch roller shaft, 7...
...Operating lever.

Claims (1)

[Scope of Claim for Utility Model Registration] In a printer configured to separate the pinch roller from the platen by pressing the operating rod of the push-pull switch, The stop rod 14 is inserted into the window 15 of the frame body 13.
A stop part 19 and a raised part 22 are formed on the stop lever member 16 which is made to protrude further and is rotatably supported by a support shaft 17 so as to be able to be lifted forward, so that the locking rod 14 is always kept above the stop part 19. The locking rod 14 is pressed against the lower part 21 and the raised portion 22 of the stop portion 19 by pressing the operating rod 7 the first time, and the locking rod 14 is pressed against the lower part 21 and the raised part 22 of the stop part 19 by pressing the operating rod 7 a second time. 14 passes through the back side of the cut and raised portion 22 and returns to its original position.