JP2558102B2 - Sheet feeding knob of recording device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a sheet feeding knob provided for manually rotating a sheet feeding roller in a recording apparatus.

[Conventional technology]

In recording devices such as printers, facsimiles, and typewriters, continuous sheets such as roll paper and fan hold paper are used as recording media such as paper and thin plastic plates, and single-leaf sheets (cut sheets) cut into pages. May be used.

Generally, when using a continuous sheet, it can be recorded continuously after setting it once, and it is convenient for the user, but when it is a single sheet, it needs to be set one by one and must be monitored at all times. Due to the inconvenience of having to do so, the administrative efficiency was low.

Generally, a recording apparatus is provided with a sheet feeding knob for manually rotating a sheet feeding roller when manually setting a single sheet. Therefore, the work of setting the single-leaf sheets one by one by hand, inserts one sheet from the sheet insertion port of the recording device and pushes it to the place where it contacts the peripheral surface of the sheet feed roller (usually the pinch roller pressure contact part), Then, the sheet feeding knob is manually operated to rotate the sheet feeding roller by an appropriate angle to set the sheet at a desired cueing position.

FIG. 1 shows an example of this type of recording apparatus. The sheet feeding knob 1 is incorporated in the recording apparatus main body and is mounted in a semi-embedded state in which it partially projects from the upper surface of a case (exterior) 2. .

FIG. 2 shows another example of a recording apparatus having a sheet feeding knob. The sheet feeding knob 3 is attached to the outside of a case 4 of the recording apparatus so as to be exposed and held by a hand.

Since the sheet feeding knobs 1 and 3 shown in FIGS. 1 and 2 are intended only for manually feeding the sheet, the peripheral surface thereof is merely provided with a shallow groove for slip prevention. This shallow groove processing is considered so that it does not hurt when the user touches it,
Generally, it is formed with a fine pitch.

Particularly, in the case of the semi-buried type sheet feeding knob 1 shown in FIG. 1, as compared with a knob that can be gripped over the entire circumference (for example, knob 3 in FIG. 2), the peripheral surface is pushed around with a fingertip, so that the fingertip Will add considerable force to
Further consideration was given so that the fingertips would not hurt.

On the other hand, when using a single-leaf sheet, in order to stop manual feeding and improve usability, an optional auto sheet feeder is placed on the recording device and connected so as to interlock, and one single-leaf sheet is automatically Means for enabling paper feeding and discharging one by one are adopted.

This auto sheet feeder is of a type in which the drive source is equipped in the feeder itself, or is always under the control of the recording device and is also provided with driving power by the recording device, depending on the degree of demand and the capability of the recording device. It can be roughly divided into types.

Further, regarding the latter type, a recording device equipped with a dedicated gear as a transmission means for driving a feeder, a device for obtaining power by frictional force from rotation of a sheet feeding roller of the recording device, and a space and It has been proposed that power is obtained through a sheet feed knob for manually rotating a sheet feed roller of a recording apparatus because of the arrangement.

The present invention relates to an improvement of the sheet feeding knob when the driving force of the automatic sheet feeder is obtained through this last type, that is, the sheet feeding knob.

When the driving force of the automatic sheet feeder is transmitted through the sheet feeding knob as described above, a gear is formed on the outer periphery of the sheet feeding knob, and the gear is meshed with the gear in the feeder to transmit power. .

3 and 4 each illustrate a conventional sheet feed knob that also serves as a conventional power transmission gear.

In the sheet feeding knob 5 shown in FIG. 3, the following conditions must be satisfied in order to realize the function of the manual operating knob of the sheet feeding roller and the function of the power transmission gear on the same outer peripheral surface.

(I) The gear 6 is used to maintain the commonality with the sheet feeding knob 5.
The outer diameter of

(Ii) The tooth profile of the gear 6 becomes large in order to ensure a positive meshing and ensure the ease of attachment and detachment.

(Iii) Since it needs to be rotated with a finger, it requires an axial dimension, which increases the width.

In order to satisfy such conditions, in the conventional sheet feed knob as shown in FIG. 3, the gear 6 having a large tooth profile is formed over the entire outer circumference, and for example, the tooth tips and the end portions have a curvature. However, there was a problem that it was very painful and painful when operated with a finger.

Therefore, in order to reduce finger pain, as shown in FIG. 4, a sheet feed knob 7 that is thick in the axial direction (large in width) is used, and a gear portion 8 that meshes with a gear on the auto sheet feeder side and a knob portion that the user touches. (The place where the finger touches) 9 is formed separately, or the structure in which the width of the gear portion 8 that meshes with the gear on the auto sheet feeder side is made as small as possible and most of it is the knob portion 9 is adopted. It was

However, with the sheet feed knob 7 having a large width, in addition to the appearance problem and the interchangeability (community) problem, the required space becomes large, and the merit of using the sheet feed knob to transmit the driving force is provided. There is a problem that the difference from the case where another transmission path is provided is reduced.

Further, in the case where the width of the gear portion 8 is made as small as possible, there are problems of the detachability and the strength of the gear.

In addition, since there is a thick portion adjacent to a portion such as the gear portion 8 that requires precision, there is a problem of shrinkage when molding with a mold, and there is also a problem that precision cannot be maintained. .

〔Purpose〕

The object of the present invention is to solve the problems of the prior art as described above, to minimize the dimension in the width direction, and to maintain the accuracy of the gear portion as a knob without pain when touched with a finger. (EN) It is an object to provide a sheet feed knob which is also easy to use and also serves as a gear of a recording apparatus.

[Means for achieving the purpose]

According to the present invention, in a sheet feeding knob of a recording apparatus that also serves as a power transmission gear, a finger pad of the gear has a padding having an outer diameter substantially the same as the outer diameter of the gear and an outer peripheral surface continuous with each tooth tip surface of the gear. By forming over the entire circumference of the end face on the side, a knob portion is formed on the outer peripheral surface of the buildup, and a part of the gear is exposed to the outside of the main body of the device for transmitting power to the outside of the device. By doing so, the above object is achieved.

〔Example〕

The present invention will be specifically described below with reference to FIGS. 5 and 6.

FIG. 5 is a perspective view of a sheet feeding knob according to an embodiment of the present invention, and FIG. 6 is a central longitudinal sectional view of the sheet feeding knob of FIG.

In FIGS. 5 and 6, the outer circumference of the sheet feeding knob 10 for manually feeding the sheet feeding mechanism (sheet feeding roller, etc.) of the recording apparatus is arranged from the drive source on the recording apparatus side to the automatic sheet feeder side. A gear portion 11 for transmitting the feeder driving force to the gear is formed.

A padding 12 as shown in FIG. 6 is provided on the end surface of the gear portion 11 on the finger-holding side (outer side), and a knob portion for manually rotating the padding 12 by touching it with an outer peripheral surface 12A of the padding 12 is provided. Are formed.

In the illustrated example, the outer peripheral surface 12A of the buildup 12 is a gear portion 11
It has the same diameter as the tip circle.

The gear portion 11 is formed over substantially the entire width of the outer peripheral surface of the knob 10, and the knob 12A is formed over the minimum width (for example, 1 mm to several mm). Further, a corner drop or an arc shape 13 is formed at the outer end of the knob portion 12A so that it does not hurt when touched with a finger.

Further, inside the padding 12, if necessary, a padding 14 as shown in FIG. 6 can be provided.

A boss portion 15 is formed at the center of the inside of the sheet feeding knob 10, and a torque transmission shaft 16 is fixed in the boss portion.

Thus, by forming the gear portion 11 on the outer peripheral surface of the sheet feeding knob 10 and providing the padding 12 having the outer diameter substantially the same with the minimum necessary width at the outer end portion touched by the finger, the original knob is provided. A sheet feeding knob having both a function and a function as a power transmission gear is configured.

FIG. 7 is an exploded perspective view showing a state in which the automatic sheet feeder 30 is mounted on the recording apparatus 20 having the sheet feeding knob 10 according to the present invention.

In FIG. 7, the sheet feeding knob 10 is incorporated in the main body of the recording apparatus 20 and is mounted in a semi-buried state in which it partially projects from the upper surface of the case 21.

A sheet insertion port 22 and a sheet ejection port 23 are provided on the upper surface of the recording device 20, and a lever 24 for switching the sheet transport mode to a manual feed mode, a friction feed mode, a pin feed mode, or the like is further provided.

On the bottom surface of the auto sheet feeder 30 mounted on the recording device 20, a positioning locking metal fitting 3 for locking the auto sheet feeder at a predetermined position on the recording device 3 is provided.
1, 31 are provided.

Further, on the upper surface of the auto sheet feeder 30, there are provided a sheet feed stacker 32 and a sheet discharge stacker 33 for accumulating and holding sheets before feeding and sheets after ejecting.

However, the auto sheet feeder 30 is provided with a gear 34 for driving a paper feed roller (not shown) and a paper discharge roller (not shown) in the feeder. The gear 34 is provided in the gear portion 11 of the sheet feeding knob 10 with the automatic sheet feeder 30 set on the recording device 20.
It engages with (FIGS. 5 and 6), and in the illustrated example, the feeder 30 is attached in a semi-submerged state so as to partially project from the bottom surface.

Thus, the operation mechanism such as the paper feed roller and the paper discharge roller in the automatic sheet feeder 30 is controlled and driven by the power transmitted from the power source (motor or the like) in the recording device 20 through the sheet feed knob 10. Is configured.

According to the embodiment described above, the following operational effects can be achieved.

(I) The width of the gear portion 11 can be designed to be sufficiently large while keeping the same width as that of the conventional sheet feed knob, so that the gear strength can be maintained and the attachment / detachment can be ensured, and the space and the appearance can be the same. I was able to maintain the same level as the knob.

(Ii) It was possible to secure a sufficient gear width without increasing the overall width of the sheet feed knob, and at the same time, the shape of the finger-touching portion, that is, the knob portion 12A could be made to be easy to use even if the width is relatively narrow. .

(Iii) Since the knob portion 12A is formed on the outer peripheral surface of the build-up 12 formed on the end surface of the gear portion, the cut-out 14 can be formed inside the build-up 12 as necessary. By selecting the desired thinness, it is possible to prevent the sink mark at the time of molding the adjacent portion such as the gear portion 11 which requires accuracy.

Also, the amount of materials used could be minimized.

〔effect〕

As is apparent from the above description, according to the present invention, in the sheet feeding knob of the recording device that also serves as the power transmission gear, the outer diameter is substantially the same as the gear outer diameter and the outer peripheral surface is the tooth tip surface of the gear. By forming a continuous padding over the entire circumference of the end surface of the gear on the finger-holding side, a knob portion is formed on the outer peripheral surface of the padding, and a part of the gear is formed to transmit power to the outside of the device. Since it is exposed to the outside of the main body of the apparatus, it is possible to obtain a sheet feed knob of a recording apparatus that can secure a sufficient gear width without increasing the overall width and can maintain the usability of the knob portion that can be touched with fingers. .

[Brief description of drawings]

1 is an external perspective view showing an example of a recording apparatus having a sheet feeding knob, FIG. 2 is an external perspective view showing another example of a recording apparatus having a sheet feeding knob, and FIG. 3 is a conventional sheet feeding knob. FIG. 4 is a perspective view showing another example of the conventional sheet feeding knob, FIG. 5 is a perspective view showing one example of the sheet feeding knob according to the present invention, and FIG. 5 is a central longitudinal sectional view of the sheet feeding knob of FIG. 5, and FIG. 7 is an exploded perspective view showing a state in which the automatic sheet feeder is mounted on the recording apparatus having the sheet feeding knob of the present invention. 10 …… Sheet feed knob, 11 …… Gear part, 12 …… Pickup,
12A: Knob section, 20: Recording device, 30: Auto sheet feeder, 34: Gear (auto sheet feeder).

Claims (1)

(57) [Claims] 1. A sheet feed knob of a recording apparatus which also serves as a power transmission gear, wherein a padding having an outer diameter substantially the same as the outer diameter of the gear and having an outer peripheral surface continuous with each tooth tip surface of the gear. By forming the knob portion on the outer peripheral surface of the padding by forming the entire circumference of the end surface on the scale side, a part of the gear is exposed to the outside of the apparatus main body in order to transmit power to the outside of the apparatus. The sheet feed knob of the recording device.