JPS6344737Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a recording paper storage mechanism in an electronic self-balancing recorder, particularly to a mechanism for forming an opening in a recording paper storage section.

In general, the long recording paper used in recorders can be wound into rolls or folded alternately at appropriate intervals, but no matter which type of recording paper is used as the recording paper source, the storage location It is desirable that the sprocket drive wheels and the sprocket drive wheels that engage with and drive both side perforations of the recording paper pulled out from the storage position are arranged close to each other. Therefore, the rolled or folded recording paper source is located below the substantially horizontal recording paper support guide plate which is continuous with the drum portion of the recording paper drive wheel. Therefore, in order to store the recording paper source in this position, the upper recording paper guide plate (preferably together with the recording paper drive wheel) must be slid rearward (in the recording paper advancing direction) to move it to the storage position. One conventional method for forming an opening was to form an opening.

A problem in forming the aperture of such a recorder is how to handle the pen tip, which is brought into pressure contact with the recording paper portion supported by the drum or the recording paper guide plate under its own weight. That is, since the guide plate or the drum portion of the recording paper drive wheel is moved backward, the pen tip, which has no supporting surface, hangs downward by an allowable amount due to its own weight. Therefore, when the guide plate (and the drum of the recording paper drive wheel) is advanced to the regular position after the recording paper source is stored in the fixed position through the formed opening, the pen that is hanging down further than in the normal usage state is removed. Accidents such as the guide plate or drum colliding first and destroying the nib often occur.

This danger is especially great in multi-pen type recorders, so in order to eliminate this, for example, when returning the guide plate to its normal position, it is necessary to raise the pen tips all at once in synchronization with this movement. It is necessary to provide a complicated mechanism.

The present invention eliminates the drawbacks of these conventional techniques,
The present invention aims to provide a mechanism for forming an opening to a recording paper storage section with a simple structure.

Briefly, the recording paper storage mechanism of the present invention includes: (a) a movable frame that holds a recording paper drive wheel at its front end and supports a recording paper guide plate connected to the drive wheel on its upper edge in a bridging manner; a fixed frame that substantially slidably holds both sides of the frame and rotatably supports a support shaft of a recording paper roll in the center; a first guide pin disposed close to or substantially coincident with the axis of the drive wheel;
a second guide pin disposed rearward than the guide pin of the movable frame, and (c) the fixed frame slidably guides the first and second guide pins of the movable frame, respectively, substantially simultaneously. By this, the first part for moving the movable frame in the front-back direction
and a second guide slot; (d) the first guide slot has a front end shaped like an upward key and a rear end substantially open; The front end of the guide slot allows movement of the second guide pin in conjunction with rotation of the movable frame necessary for the first guide pin to move up and down the key-shaped front end of the first guide slot. and (f) the rear end of the second guide slot reaches the terminal end of the substantially open first guide slot due to the backward movement of the movable frame, and the first guide pin is removed from the slot. By supporting the second guide pin as a fulcrum for rotating the movable frame diagonally upward and rearward, the recording paper roll support section at the center of the fixed frame can be opened. It is characterized by:

In a preferred embodiment of the present invention, the center of rotation of the movable frame when the first guide pin moves up and down the key-shaped front end of the first guide slot is a movable frame supported at a predetermined position of the slot. It is provided by a third pin on the frame.

When the drum of the recording paper driving wheel, which normally supports the pen tip (through the recording paper), descends and then retreats to close the opening by the opening forming means of the recording paper storage mechanism as described above, Since it rises and makes contact with the pen tip, the application of unreasonable (lateral) force to the pen tip is completely eliminated.

Embodiments of the present invention will be described below with reference to the drawings.

In FIGS. 1A and B, reference numeral 1 designates the recorder housing, that is, one side plate of the fixed frame, and between it and the other side plate (not shown), the front end (left end in the figure) is connected by a support 1a, and the rear end It is connected and supported by another support column 1a' in the vicinity. Hereinafter, unless otherwise noted, the structure described for the side plate 1 is also applied symmetrically to the other side plate.

On the inner surface of the side plate 1, a support shaft 2a for a recording paper roll 2 is rotatably supported approximately at the center, and a stopper 3 for a movable frame (FIG. 2) is fixed to the rear end. . Further, a first idle gear 4 is rotatably supported at the lower part near the front end of the side plate 1, and one side of the first idle gear 4 is connected to the drive source gear 5, and the other side is connected to the second idle gear 6 (FIG. 2). They are starting to mesh together. This gear mechanism is not necessary for the other side plate.

A first guide slot 7 is formed in the left half along the upper edge of the side plate 1, and a second guide slot 8 is formed from the center to the upper part of the rear end. In this case, the first slot 7 is formed by fixing a slot plate 7a to the inner surface of the side plate 1, and the second slot 8 is formed by punching or cutting out the side plate 1. The front end of the first slot 7 is an upward key part 7b, which gradually rises from the lower part toward the rear, becomes horizontal, extends slightly, and then opens. In this case, the lower edge of the slot plate 7a protrudes farther rearward than the upper edge. The rear end of the second slot 8 becomes a slightly elongated horizontal part, and from there it rises at a steeper angle than the main part of the first slot 7 and heads rearward to form a horizontal part with a substantial length. After that, the terminal end is shaped like a step 8a diagonally downward.

FIGS. 2A and 2B show the drive wheel support frame 9 as a movable frame slidably held between the above-mentioned side plates.
This figure shows one side of the figure, and in this case as well, it should be understood that it is symmetrical to the other side except for the gear mechanism.
At its front end, the movable frame 9 supports a recording paper drive wheel 10, which in this case consists of a drum with a sprocket, in a bridging manner. An end gear 12 is disposed between one side of the movable frame 9 and the sprocket 11 of the corresponding drive wheel 10, and meshes with the second idle gear 6, which is also pivotally supported on one side of the movable frame 9. It's becoming like that. This second idle gear 6 meshes with the first idle gear 4 of the fixed frame when the movable frame 9 is maintained in a steady state with respect to the side plate 1 of the fixed frame, and thereby the end gear 12, Therefore, it drives the recording paper drive wheel 10. A recording paper support guide plate 13 extending substantially on the same plane as the upper surface of the recording paper drive wheel 10 is fixed in a bridging manner between the upper edges of the movable frame 9, and is pulled out from the roll at the recording paper storage position between the fixed frame side plates 1. recorded paper 14
The paper passes around the recording paper drive wheel 10 by being engaged with the sprocket, passes over the guide plate 13, and is discharged from the rear end.

From the outer surface of the movable frame 9, there is a first guide pin 15 that is close to and preferably substantially coincides with the axis of the recording paper drive wheel 10, a second guide pin 16 at the lower end of the center, and A third pin 17 is protruded above the second pin 16 and located slightly forward. These pins are arranged such that when the movable frame 9 is maintained in a normal use position with respect to the side plate 1 of the fixed frame, the first pin 15 is placed in the upper part of the front end 7b of the first guide slot 7, and the second pin is placed in the upper part of the front end 7b of the first guide slot 7. 16 is located at the front end of the second guide slot 8, and a third pin 17 is located at the rear end of the first guide slot 7.

FIG. 3 shows the movable frame 9 and the fixed frame side plate 1 of the pins 15, 16 and 17 in the normal use state.
In order to form an opening to the recording paper storage section, first, by pressing the front end of the movable frame 9 downward, the movable frame 9 is moved toward the rear end of the first guide slot. The first pin 15 is moved to the lower position of the front end of the first slot 7, and the second pin 15 is rotated counterclockwise in the figure using the third pin 17 supported by
The pin 16 is moved to the point of contact between the front end of the second slot 8 and the main part of the slot that is inclined obliquely upward.

From the state shown in FIG. 4, by pressing or pulling the movable frame 9 backward, the third pin 1
7 quickly escapes from the first slot 7, and the first pin 15 slides on the main part of the first slot 7, and the second pin 16 slides on the main part of the second slot 8, respectively. In this case, since the slope of the latter slot is larger, the movable frame 9 moves backward with its rear end raised up, and eventually the two pins 1
When the slots 5 and 16 have completely moved through the horizontal portions 7c and 8c of the slots 7 and 8, they occupy the position shown in FIG.

When the rear end of the movable frame 9 in the position shown in FIG. 5 is pressed downward, the second pin 16 becomes a fulcrum at the entrance of the rear end 8a of the second slot 8.
When the first pin 15 is removed from the open end of the first slot 7 and the movable frame 9 is rotated clockwise in the figure, the second pin 16 is inserted into the stepped rear end 8a of the second slot 8. The bottom of the movable frame 9 comes into contact with and is supported by the stopper 3, and the movable frame 9 stops at the position shown in FIG.

As a result, the upper and front sides of the recording paper storage section located in the center between the side plates 1 of the fixed frame are completely opened, and the recording paper can be easily replaced. Furthermore, when the movable frame 9 moves from the steady state (FIG. 3) to the opening preparation state (FIG. 4), the recording paper drive wheel 10 is lowered almost vertically, so that the pen tip is positioned on the drum of the drive wheel 10. The drive wheel is allowed to descend due to its own weight, and the drive wheel is lowered further away from the tip of the pen, which has completely descended. Conversely, when returning to a steady state after loading recording paper, the drum of the recording paper drive wheel 10 supports its weight and lifts it to a fixed position without applying undue force to the pen tip. There is no risk of damaging the pen tip when loading recording paper.

The present invention is constructed as described above, but as a selectable modification, the third pin may be provided at another arbitrary position, the second guide pin may also serve as the second guide pin, or the second guide slot may be used as the third pin. It is also possible to adopt a structure in which the paragraph at the rear end is substantially omitted.

[Brief explanation of the drawing]

1A and B are views showing a partial plane and an inner surface of a fixed frame in an embodiment of the present invention; FIGS. 2A and B are views showing a partial plane and an outer surface of a movable frame; FIGS. 3 to 6 The figures are schematic diagrams showing step-by-step the operating states of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Fixed frame side plate, 4, 5, 6... Gear train, 7... First guide slot, 8... Second guide slot, 9... Movable frame, 10... Recording paper drive wheel, 14... Recording paper , 15...first guide pin, 16...second guide pin, 17...third pin.

Claims (1)

[Claims for Utility Model Registration] (1) (a) A movable frame that holds a recording paper drive wheel at its front end and supports a recording paper guide plate connected to the drive wheel at its upper edge in a bridging manner, and both sides of the movable frame. (b) on the outer surfaces of both side plates of the movable frame,
(c ) The first and second guide pins of the movable frame are slidably guided by the fixed frame at substantially the same time,
first and second guide slots are formed for moving the movable frame in the front-back direction; (d) the first guide slot has a front end shaped like an upward key and a rear end substantially open; (e) the front end of the second guide slot is configured to accommodate the rotation of the movable frame necessary for the first guide pin to move up and down the keyed front end of the first guide slot; The second
(f) the rear end of the second guide slot reaches the terminal end of the substantially open first guide slot due to the backward movement of the movable frame; By supporting the second guide pin as a fulcrum for rotating the movable frame diagonally upward and rearward so that the guide pin is removed from its slot,
A recording paper storage mechanism for a recorder, characterized in that a recording paper roll support at the center of the fixed frame can be opened. (2) When the first guide pin moves up and down the key-shaped front end of the first guide slot, the center of rotation of the movable frame is controlled by the third pin on the movable frame supported at a predetermined position in the slot. The mechanism according to claim (1) of the utility model registration claim, characterized in that the mechanism is configured such that: