JPH0734682Y2 - Printer case - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a printer case.

[Prior Art] Some conventional printers are configured such that when a printed continuous paper is cut, a paper is applied to an edge portion of a lid (cover) of a standard specification to cut the continuous paper. In this type of printer, the lid of the standard specification occupies most of the upper surface of the printer. Therefore, when the cut sheet feeder, pull tractor and other options are attached to the upper portion of the printer, the lid becomes an obstacle to the attachment. For this reason, either prepare a dedicated cover when installing the above options, or make a part of the standard specification cover (paper cutter part, front end part including edge) detachable and remove it to install the above options. I have to. The mechanism for attaching the paper cutter to the cover is to insert the rear end of the paper cutter into the front end of the cover or to attach the paper cutter to the cover so that the rear end of the paper cutter can be pivoted to In some cases, a projection or a hole that can be fitted with a part of the side surface of the cutout portion of the cover is provided, and the paper cutter portion is fixed by the cover by this fitting.

[Problems to be Solved] According to the above-described conventional technique, when a cover dedicated to mounting an option is prepared, there are problems in terms of cost increase, complication of parts management, and the like.

Also, when part of the standard specification cover (paper cutter) is removable, when the paper cutter is attached and continuous paper is cut at the edge, the fulcrum and edge of the paper cutter (point of force) When the paper cutter is attached to the cover so that it cannot be cut at the desired position due to unstable edge positions due to the large distance between the paper cutter and the paper cutter, and when the paper cutter is attached to the cover in a swingable manner. The force of pulling the paper upward when cutting continuous paper creates a moment of force in the direction that opens the paper cutter section with respect to the cover, and the paper cutter section does not come off the cover due to the weak fixing between the paper cutter section and the cover. There are problems such as dullness.

The purpose of the present invention is to support both the standard use of the printer (when the option is not installed) and the option installation with one cover, and it is possible to cut the paper at the correct position. It is to prevent it from coming off the cover.

[Means for Solving the Problems] In order to achieve the above object, a printer case according to the present invention includes a housing for accommodating a printing mechanism, a cover for opening and closing an opening of an upper surface of the housing, and a tip portion of the cover. A paper cutter that can be removably fitted in the notch provided in and has a sharp edged cutting edge.The paper cutter has both side end surfaces close to the cutting edge. At this position, a shaft portion having a non-circular cross section having a long diameter portion and a short diameter portion is projected, and a receiving groove into which the shaft portion can be detachably fitted is formed on both end faces of the cutout portion. The receiving groove is recessed, and the receiving groove has a circular hole having a diameter corresponding to the long diameter portion of the shaft portion, and a width corresponding to the short diameter portion of the shaft portion communicating from the circular hole to the back side of the cover. It consists of a communication groove.

[Operation] When the printer is used as standard, the paper cutter is attached to the cover using continuous paper, and when cutting the paper, the paper is applied to the cutter of the paper cutter and the paper is pulled upward, and this force is applied to the cutter. The rear end portion of the paper cutter is in contact with the receiving portion of the cover, and the shaft portion which is the swing center exists between the rear end portion of the cutter and the cutter portion. Therefore, due to the force applied to the cutter portion, the moment of the force received by the paper cutter acts in the direction of pressing the rear end portion of the paper cutter against the receiving portion of the cover, and the paper cutter is prevented from coming off the cover. Further, since the shaft portion is provided near the cutter portion, the above moment can be suppressed as small as possible and rattling of the cutter portion can be prevented, so that the paper can be cut accurately at the position desired by the user. it can. Also, the paper cutter can be easily covered by passing the short diameter part of the shaft part of the paper cutter through the communication groove of the cover to let the shaft part enter the circular hole and engaging the long diameter part of the shaft part with the circular hole. Attached to the
In addition, it can be easily removed, the configuration is simple and the manufacturing cost can be reduced. In addition, the cost can be reduced because one type of cover can be used for both standard use of the printer and installation of options.

[Embodiment] An embodiment of the present invention will be described below with reference to the drawings.

As shown in FIG. 1, the housing 1 of the printer is composed of an upper case 1a and a lower case 1b, and a cover 2 is swingably attached to an upper surface of the upper case 1a with a shaft portion 3 as a fulcrum. The cover 2 opens and closes the opening 1c on the upper surface of the housing 1. As shown in FIG. 2, a notch 4 is provided at the tip of the cover 2. The notch 4 has a paper cutter 6 which will be described later.
Is provided.

As shown in FIGS. 2 and 3, the leading edge portion of the paper cutter 6 is a sharply pointed cutter portion 6a. A shaft portion 7 is provided on both end surfaces of the paper cutter 6 so as to be proximate to the cutter portion 6a. The shaft portion 7 has a long diameter portion 7b and a short diameter portion 7a, and has a non-circular cross-sectional shape. Click protrusions 8 are provided near the rear ends of both end surfaces of the paper cutter 6.

As shown in FIGS. 2 and 4, receiving grooves 9 into which the shaft portion 7 can be removably fitted are provided on both end surfaces of the cutout portion 4. That is, the receiving groove 9 has a circular hole 9a having a diameter slightly larger than the width of the long diameter portion 7b of the shaft portion 7, and the circular hole 9a communicates with the rear surface side of the cover 2 and the short diameter portion 7a of the shaft portion 7. It is composed of a communication groove 9b having a width slightly larger than the width.

A receiving portion 11 is provided at the center of the cutout portion 4 of the cover 2, and this is a rear end portion 6b of the paper cutter 6 as shown in FIG.
Can abut.

Click grooves 12 are provided in the vicinity of the rear ends of both end surfaces of the cutout portion 4 of the cover 2. The click protrusion 8 of the paper cutter 6 and the click groove 12 of the cover 2 can be fitted to each other when the paper cutter 6 is mounted on the cover 2 as described later.

As shown in FIG. 1, the housing 1 houses a printing mechanism 13 including a printing head, a platen, a head carrier, a tractor, and the like. When the printer is used as standard, the continuous paper 15 is used as shown in FIG. 1, and the housing is set so that the unused portion of the continuous paper 15 fed into the printer does not come into contact with the printed portion delivered from the printer. 1
A paper shelf 16 is provided behind the upper cover 2. At the time of printing, the continuous paper 15 passes through the lower surface of the paper shelf 16 and the upper surface of the upper case 1a,
Printing is performed via the printing mechanism 13, and the paper is ejected onto the upper surface of the paper shelf 16. When the option 14 is mounted as described later, the paper shelf 16 is attached to the printer with its front and back reversed as compared with FIG. 1 to support the option 14, as shown in FIG.

Next, the operation will be described. First, a method for attaching the paper cutter 6 to the cutout portion 4 of the cover 2 will be described with reference to FIG. From the back surface side of the cover 2, move the paper cutter 6 in the direction of the double-dashed line arrow a to connect the short diameter portion 7a to the communication groove.
Insert in 9b. After the long diameter portion 7b is brought into contact with the circular hole 9a, the paper cutter 6 is centered around the shaft portion 7 and is indicated by a two-dot chain line arrow b.
Rotate in the direction. From the tip of one click protrusion 8,
The distance to the tip of the other click protrusion 8 is set to be larger than the distance between the end faces on both sides of the cutout portion 4.

Therefore, when the click protrusion 8 faces the portion 4a above the click groove 12 of the cutout portion 4 shown in FIG.
When both side end surfaces of the notch 4 are bent inward or both side end surfaces of the notch 4 are bent outward, the click protrusion 8 passes through the portion 4a, and the click protrusion 8 fits into the click groove 12.

At this time, the rear end portion 6b of the paper cutter 6 is in contact with the receiving portion 11 of the cover 2. This completes the attachment of the paper cutter 6 to the cutout portion 4 of the cover 2. At this time, due to the positional relationship between the shaft portion 7 of the paper cutter 6 and the receiving groove 9, the long diameter portions 7b, 7b cannot pass through the communication groove 9b, and the paper cutter 6
Does not fall off the cover 2. Further, the paper cutter 6 can be easily and surely mounted on the cover 2 with a simple structure by fitting the click projection 8 and the click groove 12.

When using the printer as standard, use continuous paper 15 as shown in Fig. 1.
When the paper cutter 6 is attached to the cover 2 by the above-described method and the paper 15 is cut at a predetermined position, the paper 15 is applied to the cutter portion 6a, and the paper 15 is pulled upward and cut.

The tensile force at this time is applied upward to the cutter portion 6a.
As shown in FIG. 5, the rear end portion 6b of the paper cutter 6 is in contact with the receiving portion 11 of the cover 2, and the rear end portion 6b and the cutter portion 6a.
There is a shaft portion 7 which is the center of swinging between and. Therefore, the moment of the force received by the paper cutter 6 due to the force applied to the cutter portion 6a acts in the direction in which the rear end portion 6b of the paper cutter 6 is pressed against the receiving portion 11 of the cover 2 (the direction of the double-dashed line arrow b), and the paper cutter 6 is covered. It is prevented from coming off from 2.

Further, since the shaft portion 7 is provided near the cutter portion 6a, the above moment when the paper 15 is cut can be suppressed as small as possible, and the rattling of the cutter portion 6a can be prevented. The paper 15 can be cut accurately at the position.

Next, a description will be given of when the option is attached.

A case where the cut sheet feeder 14 is optionally attached as shown in FIG. 6 will be described. When removing the paper cutter 6 from the cover 2, the paper cutter 6 can be easily removed by the procedure reverse to the above-described mounting. After that, the cut sheet feeder 14 can be mounted on the upper surface of the printer including the cutout portion 4 to print on the cut sheet.

Therefore, the cost can be reduced because one type of cover can be used for both standard use of the printer and installation of options.

The shape of the shaft portion is not limited to this embodiment, the cross-sectional shape may be a non-circular shape having a long diameter portion and a short diameter portion, the shape of the circular hole and the communication groove is not limited to this embodiment, and the shape of the shaft portion It only has to have dimensions corresponding to the long diameter portion and the short diameter portion.

Further, a click groove may be provided on a side surface of the paper cutter, and a click protrusion may be provided on a side end surface of the cutout portion. The click protrusion and the click groove may be provided on the side end surface of only one of the paper cutter and the cutout. Further, the click protrusion and the click groove may be omitted.

Further, the option to be attached to the printer is not limited to this embodiment, and may be, for example, a pull tractor.

[Effects] According to the present invention, by simply attaching and detaching the paper cutter to and from the cover, it is possible to support both standard use of the printer and installation of options, and only one type of cover is required, and the cost can be reduced. .

When using continuous paper when using the printer as standard equipment, attach the paper cutter to the cover.At this time, the rear end of the paper cutter is in contact with the receiving part of the cover, and the space between the rear end of the cutter and the cutter is There is a shaft that is the center of swing.
Therefore, when the paper is cut by the paper cutter, the moment of the force applied to the cutter works in the direction of pressing the rear end of the paper cutter against the receiving portion of the cover, and the paper cutter is prevented from coming off the cover.

Further, since the shaft portion is provided near the cutter portion, the above moment can be suppressed as small as possible, and the rattling of the cutter portion can be prevented, so that the sheet can be cut accurately at the position desired by the user.

Further, the shaft portion of the paper cutter has a non-circular cross-sectional shape having a long diameter portion and a short diameter portion, and the notch receiving groove communicates with the circular hole having a diameter corresponding to the long diameter portion and the circular hole. , Because it consists of a communicating groove of width corresponding to the short diameter part,
By passing the short diameter part through the communication groove and inserting the shaft part into the circular hole and engaging the long diameter part with the circular hole, the paper cutter can be easily and securely attached to and removed from the cover, and the configuration is simple. Can reduce the manufacturing cost.

[Brief description of drawings]

FIG. 1 is a sectional view, FIG. 2 is a plan view, FIG. 3 is a side view of a paper cutter, FIG. 4 is a sectional view of a cover, and FIG. 5 is paper. FIG. 6 is a partially cutaway sectional view showing how the cutter is attached to the cover, and FIG. 6 is a sectional view showing when the option is attached. 1 ... Housing, 1c ... Opening part, 2 ... Cover, 4 ... Notch part, 6 ... Paper cutter, 6a ... Cutter part, 7 ... Shaft part, 7
a, 7a ... short diameter part, 7b, 7b ... long diameter part, 8 ... click protrusion, 9
… Receiving groove, 9a… Circular hole, 9b… Communication groove, 12… Click groove,
13 ... Printing mechanism.

Claims (2)

[Scope of utility model registration request] 1. A housing for accommodating a printing mechanism, a cover for opening and closing an opening of an upper surface of the housing, and a notch portion provided at a tip portion of the cover, which is detachably fittable and a tip edge portion. Is a paper cutter having a sharply sharpened cutter portion, and a shaft having a non-circular cross section having a long diameter portion and a short diameter portion at positions close to the cutter portion on both end surfaces of the paper cutter. And a receiving groove into which the shaft portion can be detachably fitted, the receiving groove is formed in the long diameter portion of the shaft portion. A printer case, comprising: a circular hole having a corresponding diameter, and a communication groove communicating with the circular hole from the back side of the cover and having a width corresponding to the short diameter portion of the shaft portion. 2. A click projection is provided on one of the vicinity of the rear end of at least one side end surface of the paper cutter and a vicinity of the rear end of the side end surface of the cutout portion, and a click groove is provided on the other side thereof, and the paper cutter and the paper cutter. The printer case according to claim 1, wherein the printer case and the cutout portion are provided so that they can be fitted to each other.