JP2553209B2 - Printer - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a printer.

[Prior Art] A conventional printer has a main body case 1 as shown in FIG.
The paper P inserted from the paper feed port 2 is fed between the print head 5 and the platen 6 under the cooperation of the feed roller shaft 3 and the pinch roller 4, and is printed by the head 5.
After printing, the paper is generally ejected from the paper ejection port 8 via the paper feed rollers 7, 7.

[Problems to be Solved by the Invention] By the way, in the printer having the above-described structure, if the gap between the print head 5 and the platen 6 is not adapted to the thickness of the sheet, a problem such as unclear printing may occur. Further, if the gap between the paper feed rollers 7 and 7 is not adapted to the paper thickness, the paper may not be fed smoothly. For example, if the gap between the paper feed rollers 7 and 7 is too wide compared to the thickness of the paper, slippage may occur between the paper and the roller 7 and the paper may not be fed with high accuracy. Further, if the gap is too narrow compared to the thickness of the paper, the paper may be difficult to be inserted between the rollers 7, 7 and may not be fed.

On the other hand, in recent years, in order to further expand the field of use of printers (particularly portable printers), it is often demanded that the size and cost are reduced to the utmost limit. Therefore, there is a demand for the development of a technique capable of facilitating the above-mentioned gap adjustment to improve the handleability, and at the same time reduce the size and cost.

In view of the above circumstances, an object of the present invention is to provide a printer that can be easily handled and can be downsized and reduced in cost.

[Means for Solving the Problems] The present invention is directed to a main body case, a frame formed to be openable and closable around a platen and a fulcrum built in the main body case, and to which a print head is attached, A lock lever that locks the frame while controlling the distance between the print head and the platen when the frame is closed by being rotatably attached to the body case, and in the paper width direction of the body case. One arranged comb-shaped member, the other comb-shaped member that is provided on the lock lever and meshes with the one comb-shaped member when the frame is locked to the lever, and the vicinity of both comb-shaped members And a drive roller that applies a feeding force to the sheet that has passed through the comb tooth-shaped member. [Operation] In the present invention, when the frame is locked in the closed state using the lock lever, the distance between the print head and the platen is regulated, and the gap between the head and the platen is adjusted.
At the same time, the one comb tooth-shaped member and the other comb tooth-shaped member of the paper feeding device are alternately meshed with each other, and the drive roller is positioned at the regular position, and the operation preparation of the paper feeding device is completed. In this paper feeding device, since the change in the paper thickness can be absorbed by the comb-shaped members, the gap adjustment becomes unnecessary.

Therefore, it is not necessary to provide a special gap adjusting means to adjust the gap of the print head, the platen, etc., and the number of parts can be reduced. As a result, it is possible to reduce the size and cost and improve the handleability.

Here, when the paper is inserted between the one comb-teeth-shaped member and the other comb-teeth-shaped member, the two members cooperate to deform the paper into a bellows shape, thereby increasing the rigidity and pressing it against the drive roller. It acts so that a sufficient frictional force is generated between the paper and the roller to feed the paper. Therefore, a sufficient feeding force can be applied to the paper by the drive roller, and the paper can be fed with high precision.

Here, since both comb-tooth-shaped members are stationary members, a supporting member for rotationally supporting them is unnecessary. Further, at this time, both comb tooth-shaped members may be arranged so as to face each other so as to mesh with each other, and the distance between both members can be shortened to save the installation space. Therefore, it is possible to save the installation space and reduce the number of parts, and also from this point, the size and cost can be reduced.

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

The printer according to the present embodiment uses the lock lever 21 that locks the frame 11 on which the print head 5 is mounted in the closed state without providing a special gap adjusting means, and when the frame 11 is closed, the print head is closed. 5 is configured so that the distance between the platen 6 and the platen 6 can be regulated to adjust the gap, and the operation of the sheet feeding device can be completed. The main body case 1, the print head 5, the platen 6, and the frame 11 The lock lever 21 and the sheet feeding device 31 are included.

The same components as those shown in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted or simplified.

Here, the frame 11 is mounted in the body case 1 so as to be openable and closable around a fulcrum 13. In the present embodiment, the frame 11 is urged by a spring (not shown) in a direction in which it is always opened. The print head 5 is mounted on the frame 11 via a carrier 12 that can reciprocate in a direction perpendicular to the plane of the drawing.

The lock lever 21 is a means for locking the frame 11 in the closed state, adjusting the gap between the print head 5 and the platen 6 and preparing for the operation of the paper feeding device 31, and one point 22
It is rotatably attached to the main body case 1 around the. Specifically, the lock lever 21 engages with the engagement pin 14 provided on the frame 11 when the frame 11 is closed, and regulates the distance between the print head 5 and the platen 6. It is formed so as to lock the frame 11.

In this embodiment, the engagement pin 14 is eccentric, and the engagement position with the lock lever 21 can be changed by eccentrically moving the pin 14. This makes frame 11
Body case 1 when the lock is locked by the lock lever 21
It is formed so as to adjust the gap amount between the print head 5 and the platen 6 by changing the inclination angle with respect to.

On the other hand, the paper feeding device 31 includes a driving roller 34 that applies a paper feeding force and a rigidity that is increased by deforming the paper in a bellows shape and presses the driving roller 34 against the driving roller 34, and a sufficient frictional force for feeding the paper between the paper and the roller 34. It is composed of one and the other comb-shaped members 32 and 33 for generating the.

Here, the drive roller 34 is rotatably mounted on the lock lever 21, as shown in FIG.

On the other hand, the comb-shaped members 32 are arranged in the paper width direction of the main body case 1 as shown in FIG. In this embodiment, the comb-tooth-shaped member 32 is integrally formed with the main body case 1 to facilitate processing and reduce costs.

Further, the other comb tooth-shaped member 33 is formed so as to alternately mesh with the one comb tooth-shaped member 32 when the frame 11 is locked by the lock lever 21. On the other hand, the comb tooth-shaped member 33
Is integrally formed with the lock lever 21 for easy processing and cost reduction.

 Next, the operation will be described.

When the lock lever 21 is used to lock the frame 11 in the closed state, the distance between the print head 5 and the platen 6 is regulated, and the gap between the head 5 and the platen 6 is adjusted.
Here, when it is desired to change the gap amount, the engaging pin 14 is eccentric to change the engaging position with the lock lever 21 and adjust the inclination angle of the frame 11 with respect to the main body case 1.

At the same time, the one comb tooth-shaped member 32 and the other comb tooth-shaped member 33 of the paper feeding device 31 are alternately meshed with each other, and the driving roller 34 is positioned at the regular position, and the paper feeding device 31 is ready for operation. To do. In this paper feeding device, since the change in the paper thickness can be absorbed by the comb-shaped members 32 and 33, the gap adjustment becomes unnecessary.

Here, the paper P has one comb-teeth member 32 and the other comb-teeth member
When inserted into the sheet 33, the members 32 and 33 cooperate with each other to deform the sheet P into a bellows shape and increase the rigidity. That is, the comb-shaped members 32 and 33 increase the resistance force to the deformation of the paper P in the direction perpendicular to the paper surface due to the frictional force generated between the comb teeth members 32 and 33. Then, both members 32 and 33 generate a sufficient frictional force to press the paper P having increased rigidity against the drive roller 34 and to feed the paper between them. Thus, the comb-shaped members
The paper P rubbed by 32, 33 is fed with a feeding force by the driving roller 34 and is fed with high precision.

Thus, according to this embodiment, the main body case 1, the frame 11 formed so as to be openable and closable around the platen 6 and the fulcrum 13 built in the main body case 1, and the print head 5 is mounted, and one point Main case 1 around 22
A lock lever 21 for locking the frame 11 while restricting the distance between the print head 5 and the platen 6 when the frame 11 is closed and the frame 11 is closed;
And one comb tooth-shaped member 32 arranged in the paper width direction and the other comb tooth-shaped member provided on the lock lever 21 and meshing with the one comb tooth-shaped member 32 when the frame 11 is locked by the lever 21.
A sheet feeding device 31 is provided which includes 33 and a driving roller 34 which is provided in the vicinity of both comb tooth-shaped members 32 and 33 and applies a feeding force to the sheet P that has passed through the comb tooth-shaped members 32 and 33. Therefore, the print head 5 can be provided without providing any special gap adjusting means.
It is possible to set the gap between the platen 6 and the platen 6 and set the paper feeding device 31 capable of absorbing the change in the paper thickness in the state of being ready for operation. Therefore, it is possible to reduce the number of parts and achieve downsizing and cost reduction. In addition, since it is not necessary to adjust the gap, it is possible to improve the handleability.

Further, since the one and the other comb tooth-shaped members 32 and 33 are stationary members, a supporting member for rotationally supporting them is unnecessary. Further, it is sufficient that both comb-tooth-shaped members are arranged so as to face each other so as to mesh with each other, and the width dimension can be shortened to save the installation space. Therefore, it is possible to save the installation space and reduce the number of parts, and also from this point, the size and cost can be reduced.

Further, since the one and the other comb tooth-shaped members 32 and 33 are integrally formed with the main body case 1 and the lock lever 21, respectively,
It is possible to further reduce the size and cost.

[Effects of the Invention] According to the present invention, a main body case, a frame formed to be openable and closable around a platen and a fulcrum built in the main body case, and equipped with a print head, and a main body case around one point Lock lever that locks the print head and the platen when the frame is closed and the frame is closed, and a one-sided comb tooth shape arranged in the paper width direction of the main body case. Members,
The other comb tooth-shaped member that is provided on the lock lever and meshes with the one comb tooth-shaped member when the frame is locked by the lever, and the sheet that is provided in the vicinity of both comb tooth-shaped members and has passed through the comb tooth-shaped members. Since the sheet feeding device including the driving roller for applying the feeding force is provided, it is easy to handle, and the size and cost can be reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIGS. 2 and 3 are views showing a sheet feeding device, FIG. 2 is a plan view, and FIG.
The figure is an enlarged view. FIG. 4 is a diagram showing a schematic configuration of a conventional printer. 1 ... Main body case, 5 ... Print head, 6 ... Platen, 11 ... Frame, 21 ... Lock lever, 31 ... Paper feeding device, 32 ... One comb tooth-shaped member, 33 ... Other comb tooth-shaped member Member, 34 ... Drive roller.

Claims (1)

(57) [Claims] 1. A main body case, a frame formed so as to be openable and closable around a platen and a fulcrum built in the main body case, and having a print head attached thereto, and rotatable around the main body case about one point. A lock lever that locks the frame while restricting the distance between the print head and the platen when the frame is mounted and the frame is closed; and a comb-shaped member arranged in the paper width direction of the main body case. And the other comb tooth-shaped member that is provided on the lock lever and meshes with the one comb tooth-shaped member when the frame is locked to the lever, and the comb tooth-shaped member that is provided in the vicinity of both comb tooth-shaped members. A printer provided with a sheet feeding device including a driving roller that applies a feeding force to the sheet that has passed through the sheet.