JPH09314932A - Portable printer and its assembly method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the trouble in the outdoor operation at the time of raining caused by the lack of waterproof and drip-proof functions. SOLUTION: A through-hole with a step is formed concentrically with a central shaft of a platen shaft 3 integrated with a platen 2 on a central section of a casing side wall 1, and a release drum 4 with a tongue-shaped protrusion and a spring 5 are inserted into the end of the platen shaft 3, and a serration shape with serrated notches is formed on one end face of the release drum 4. An operation knob shaft is inserted and integrated with a central section of a joint 8 interposed on the left end of the platen shaft 3 through the through- hole with a step formed on the casing side wall 1. The serration shape of serrated notches to be meshed with each other is formed the surface on which the joint 8 is fixed to the release drum 4. The spline shapes meshing with each other are formed respectively on the outer peripheral face of the shaft of the operation knob 6 and the inner peripheral face of the joint 8. A place is formed on an end section 3a of the platen shaft 3, and a hole of similar figure to the left end section of the platen shaft 3 and slightly larger in size is formed on the end of the operation knob shaft.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable printer and an assembling method thereof, and more particularly to a portable printer having a waterproof / drip-proof function and an assembling method thereof.

[0002]

2. Description of the Related Art FIG. 3 is a perspective view showing an example of a conventional portable printer device.

Referring to FIG. 3, in the conventional printer device, a platen 33 and a printer head 34 are mounted on a printer body 35, and the platen 33 feeds / feeds paper.
A feed knob 31 for returning and a release lever 32 for releasing / fixing the printer head 34 are provided.

A portable printer attached to a portable information device is used outdoors, and especially when it is raining. In order to use in such an environment, the waterproof / drip-proof structure of the main body of the portable printer must be taken into consideration.

A feed knob 31 for feeding / returning a sheet
And release lever 3 for releasing / fixing the printer head 34
In a conventional portable printer including 2 and 3, the entire printer main body shown in FIG. 3 is housed in a housing (not shown), and the paper is fed / returned by a feed knob and the printer head is released / fixed outdoors. When carrying out the procedure, a casing cover (not shown) was opened for operation.

[0006]

In this conventional portable printer, the entire printer main body including the feed knob and the release lever of the printer head is housed in the housing, and the paper is fed / returned outdoors or the printer head is opened. When releasing / fixing, the housing cover was opened and the feed knob and the release lever of the printer head were operated.

[0007] If the feed knob and the release lever are simply brought out of the housing so that the housing can be operated outdoors without opening the housing cover, the upper and lower covers of the housing can escape by the diameter of the feed knob. Since it is necessary to provide the device, there is a problem that it goes against the downsizing which is convenient for carrying.

That is, since the conventional portable printer is not provided with a waterproof / drip-proof measure for the printer main body, there is a problem in that it is difficult to operate outdoors when it is raining.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable printer and its assembling method that prevent water from entering the housing from the feed knob and the release lever.

[0010]

According to the first aspect of the present invention, a portable device in which a printer main body including a feed knob for feeding / returning paper and a release lever for releasing / fixing a printer head is housed in a housing. A portable printer is provided with an operating knob for operating the feed knob and rotating the release lever outside the housing by rotating the printer.

Further, a portable printer is obtained in which the operating knob has a clutch structure capable of being fixed by pushing into the housing and by being fixed by withdrawing from the housing.

Further, there is obtained a portable printer characterized in that an O-ring is attached to the outer periphery of the shaft portion of the operation knob attached to the printer main body portion.

According to the second aspect of the invention, a portable device having a structure in which a printer main body including a feed knob for feeding / returning paper and a release lever for releasing / fixing the printer head is housed in a housing. A method of assembling a printer for a printer, comprising: an operating knob that causes the feed knob and the release lever to function by pushing / pulling out and rotating the housing, and after the printer main body is attached to the housing, the operating knob is provided. A method for assembling a portable printer, characterized in that an O-ring is attached to the outer periphery of the shaft portion, the shaft portion of the operation knob is inserted into the stepped through hole of the housing, and is attached on the same axis as the platen shaft. Is obtained.

[0014]

Next, the present invention will be described with reference to the drawings.

FIG. 1 is a partial cross-sectional view showing a structure on a platen shaft according to an embodiment of the present invention. FIG. 1A shows a state in which an operating knob is pulled out from the housing, and FIG. 1B shows the operating knob pushed into the housing. It shows the state.

Referring to FIG. 1A, a stepped through hole is provided in the central portion of the side wall 1 of the housing so as to be concentric with the central axis of the platen 2 and the platen shaft 3 integrated with the platen 2. Has been.

A releasing drum 4 having a tongue-like projection for releasing / fixing the printer head is inserted at the tip of the platen shaft 3 (the left end of the platen 2 in the figure). A spring 5 is inserted at the center of the left end of the release drum 4 at the tip.

Here, the releasing drum 4 and the spring 5 have a fitting structure that is rotatable with respect to the platen shaft 3, and one end surface (left end surface in the figure) of the releasing drum 4 has a sawtooth shape. The serration shape having the notches is formed.

Further, a joint 8 is interposed at the left end of the platen shaft 3, and the shaft of the operation knob 6 is inserted and engaged from the left side of the drawing through the stepped through hole of the housing side wall 1 at the center of the joint 8. There is.

A serration shape is formed on the surface of the joint 8 facing the release drum 4 so as to mesh with the sawtooth-shaped notch on the end surface of the release drum 4. Further, the shaft outer peripheral surface of the operation knob 6 and the inner peripheral surface of the joint 8 are formed with spline shapes that mesh with each other, and are engaged by press fitting.

Further, a flat surface is provided at the tip portion 3a of the platen shaft 3, and a hole having a shape slightly similar to the left end cross section of the platen shaft 3 is formed at the tip portion (right side) of the operation knob shaft. Has been done.

Therefore, when the operation knob 6 is moved in the axial direction, the operation knob shaft is slidably inserted into the platen shaft 3, and when the operation knob 6 is rotated, the operation knob shaft and the platen shaft 3 are directly connected and rotated. Communicate movements.

In the present embodiment adopting this structure, FIG.
In the state shown in (a), the rotary motion is transmitted to the platen 2 by rotating the operation knob 6, and the paper is fed / returned.

An E-ring 9 is attached to the inside of the housing side wall 1 of the shaft of the operating knob 6 (on the right side in the figure) to prevent it from slipping out, and the outer side of the housing side wall 1 (on the left side in the figure) is waterproofed. An O-ring 7 is attached for drip-proof.

Next, referring to FIG. 1 (b), when the operating knob 6 is pushed into the housing (arrow A) from the state shown in FIG. 1 (a), the operating knob shaft moves rightward on the platen shaft 3. The serration shape of the joint 8 that slides and is press-fitted at the tip (right end) of the operation knob shaft meshes with the serration shape of the release drum 4, and the rotational movement of the operation knob 6 is transmitted to the release drum 4. In this state, the spring 5 is compressed between the release drum 4 and the joint 8.

Therefore, when the operator rotates the operation knob 6 in the direction of arrow B, the release drum 4 also rotates in the same direction, and the tongue-shaped projection pushes the printer head (not shown) away, so that the printer head is released. / Fixing is done.

When the operator releases the operating knob 6 from this state, the operating knob 6 returns to the state shown in FIG.
The anchorage with is released.

Next, a method of assembling the portable printer of this embodiment will be described with reference to FIG. FIG. 2 is an exploded perspective view for explaining a method of assembling the portion shown in FIG.

The portable printer of the present embodiment having a configuration in which the printer main body including the feed knob for feeding / returning the paper and the release lever for releasing / fixing the printer head is housed in the housing is as follows. It is assembled by.

First, the release drum 4 having the tongue-shaped projection 4a is inserted up to the base of the tip 3a of the platen shaft 3 integrated with the platen 2, and the spring 5 is further attached to the tip of the tip 3a. .

The printer main body including the platen 2 having this structure is mounted and fixed in the housing.

Next, the O-ring 7 is inserted on the outer periphery of the shaft of the operating knob 6, and the tip of the shaft of the operating knob 6 is inserted into the stepped through hole 1a of the inner wall 1 of the housing from the outside of the housing. Then, the joint 8 is interposed and engaged with the tip of the platen shaft 3, and a retaining E ring 9 is attached to a groove 6a provided on the outer circumference of the shaft of the operation knob 6 to fix the operation knob 6. .

[0033]

As described above, the portable printer assembled by the assembling method of the present invention is provided with the printer main body portion having the feed knob for feeding / returning the paper and the release lever for releasing / fixing the printer head. In a portable printer in which the housing is housed in the housing, an operation knob that functions as a feed knob and a release lever by rotating operation is provided outside the housing, and the operation knob is pushed into the housing and fixed from the housing. By having a clutch structure that allows the drawer to be fixed, and by attaching an O-ring to the outer circumference of the shaft of the operating knob attached to the printer body, it has a waterproof and drip-proof function by a simple assembly method. Since it can be done, it has the effect of significantly improving the operability outdoors.

Further, since the operating knob is arranged outside the housing, there is an effect that the entire size can be reduced and the portability is improved.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing a configuration on a platen shaft according to an embodiment of the present invention, (a) shows a state in which an operating knob is pulled out from a housing, and (b) shows a state in which the operating knob is pushed into the housing. Indicates.

FIG. 2 is an exploded perspective view for explaining a method of assembling the portion shown in FIG.

FIG. 3 is a perspective view showing an example of a conventional portable printer device.

[Explanation of symbols]

 1 Housing Side Wall 1a Stepped Through Hole 2 Platen 3 Platen Shaft 3a Tip 4 Release Drum 4a Tongue-shaped Projection 5 Spring 6 Operation Knob 6a Groove 7 O-ring 8 Joint 9 E-ring

Claims (4)

[Claims] 1. A portable printer in which a printer main body including a feed knob for feeding / returning a paper and a release lever for releasing / fixing a printer head is housed in a housing, and the feed knob functions by rotating operation. A portable printer, characterized in that an operating knob for causing the release lever to function is provided outside the housing. 2. The portable printer according to claim 1, wherein the operation knob has a clutch structure that can be fixed by being pushed into the housing and fixed by being pulled out from the housing. 3. The portable printer according to claim 1, wherein an O-ring is attached to the outer periphery of the shaft portion of the operation knob attached to the printer main body portion. 4. A method of assembling a portable printer having a structure in which a printer main body including a feed knob for feeding / returning paper and a release lever for releasing / fixing a printer head is housed in a housing. An O-ring is provided on the outer circumference of the shaft portion of the operation knob after the printer main body is attached to the housing by providing an operation knob that causes the feed knob and the release lever to function by pushing / pulling out and rotating the housing. A method of assembling a portable printer, characterized in that the shaft end of the operation knob is inserted into the stepped through hole of the housing and mounted on the same axis as the platen shaft.