JPS63197648A - Typewriter - Google Patents

Abstract

PURPOSE:To smoothly perform printing work, by accommodating a type wheel high in use frequency in the vicinity of the center of a housing magazine and automatically replacing the same with the most frequently used type wheel when a power source is closed to eliminate a wasteful time for wheel replacement. CONSTITUTION:A type wheel 1 is accommodated in each of wheel cartridges 30 and five wheel cartridges 30 are housed in a wheel magazine 40 so as to be arranged side by side. The wheel magazine 40 can be received in a receiving stand 41 by sliding said magazine from the side and a receiving stand shaft 42 pierces through a part of the bottom side if the receiving stand 41. A rack 43 is provided to the receiving stand 41 to be meshed with a gear 44 while the gear 44 is rotated by a motor 45. when a sensor 76 detects that the magazine 40 reaches the home position, the end part of an up-and-down lever 46 arrives at the almost center position of the magazine 40 and the most frequently used type wheel is accommodated at said position.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a typewriter, and more particularly to a typewriter in which the type of characters printed can be changed by automatically replacing the type wheel.

[Prior Art] Conventionally, electronic typewriters have multiple type wheels stored in their carriers, and the type wheels are automatically replaced and printed based on instructions from a keyboard, etc., depending on the type of character to be printed. be.

Among these plurality of type wheels, there are type wheels that are often used and type wheels that are used only occasionally, and after selecting this type wheel that is used less frequently, the possibility of replacing the type wheel increases.

[Problems to be solved by the invention] In particular, the first printing key after power is turned on is likely to be the frequently used printing wheel.
If a type wheel that is infrequently used is attached, it is necessary to print after replacing the type wheel, resulting in a problem that time is wasted for wheel replacement. Furthermore, the time required to replace the type wheel is related to the storage distance within the wheel magazine; naturally, the longer the distance, the longer the replacement time will be.

The present invention was made in view of the above-mentioned conventional example, and stores the frequently used type wheel near the center of the storage magazine.
To provide a typewriter capable of automatically replacing the type wheel with the most frequently used type wheel when the power is turned on, eliminating wasted time for wheel replacement, and smoothly performing printing work.

[Means for Solving the Problems] In order to achieve the above object, the typewriter of the present invention has the following configuration. That is, a storage means for storing a plurality of type wheels and storing the most frequently used type wheel near the center, a key input means for inputting document information, and a means for selecting desired type from the type wheels and inputting the desired type on the recording medium. a recording means for storing data in the storage means; a mounting means for moving the storage means to select a type wheel corresponding to an input character type; and transferring the type wheel from the storage means to the recording means and mounting it; when power is turned on; The apparatus also includes means for selecting a frequently used type wheel and mounting it on the recording means.

[Function] In the above configuration, the storage means stores a plurality of type wheels, and stores the most frequently used type wheel near the center. When the power is turned on, the most frequently used type wheel is selected and operated to be attached to the recording means for storing data on the recording medium.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[Description of the structure of the electronic typewriter (FIG. 1)] FIG. 1 is a block diagram of the electronic typewriter of this embodiment.

In the figure, 100 is a keyboard equipped with character keys for inputting document information to be printed, and function keys for instructing carriage return, paper feed, etc. A display unit 101 displays input document information, various statuses, and the like. Reference numeral 102 denotes a printer unit that performs printing operations in response to manual keystrokes from the keyboard 100, and in this embodiment is a type printer that performs printing using a type wheel. Reference numeral 103 denotes a wheel replacement section that replaces the type wheel in response to instructions from the keyboard 100, which will be described later.

Reference numeral 104 denotes a control unit that controls the entire typewriter, such as a CPU such as a microprocessor, and an RA in the ROM1 work area that stores the CPU control program and data.
Equipped with M etc. 105 is an area 106 for storing the position and type of type wheels in the magazine in correspondence with each other;
It is a memory equipped with etc.

[Explanation of external appearance of typewriter (Fig. 2)] Fig. 2 is an external view of the electronic typewriter of this embodiment, and parts common to Fig. 1 are indicated by the same symbols.

In the figure, 1 is a type wheel that rotates in the direction of the arrow to select the type corresponding to the key code input from the keyboard 100, and prints it on paper 3 via an ink ribbon; 2
is a carriage that moves parallel to the longitudinal direction of the platen 4 to determine the printing position, and a wheel replacement section 1, which will be described later, is located at the bottom.
The 0 display section 101 on which 04 is mounted is the keyboard 10
The document information and various messages inputted from 0 are displayed.

[Explanation regarding wheel cartridge replacement (Fig. 3,
FIG. 4)] FIG. 3 is a cross-sectional view of the carriage 2, and explains the mechanism of the wheel exchange section 103 for exchanging the wheel cartridge 30. In this figure, parts common to those described above are indicated by the same symbols.

The type wheel 1 is housed inside the wheel cartridge 30, and five wheel cartridges 30 themselves are housed in a wheel magazine 40 in parallel.

The wheel magazine 40 can be stored by sliding it from the side into the storage stand 41. A storage stand shaft 42 passes through a part of the bottom of this storage stand 41. Also, this storage stand 41
A rack 43 is provided. This rack 43 and a gear 44 mesh with each other, and the gear 44 is rotated by a motor 45. Therefore, movement of the storage table 41 in the direction of arrow C for selection of the wheel cartridge 30 is performed by the rotation of the motor 45. When selecting a type wheel, the controller 45 can be controlled to stop at a wheel cartridge containing a desired type wheel among the five type wheel cartridges in the wheel magazine 40.

Further, the storage stand 41 is provided with recesses 50 corresponding to each wheel cartridge.

The wheel magazine 40 is placed in the front and back direction of the platen 4 (arrow C
direction), the up/down lever 46 continues to maintain its normal position as shown in FIG. A rack 47 is cut at the end of the vertical lever 46 on the opposite side from the part connected to the magazine 40, and is engaged with a gear 48. This gear 4
8 is rotated by a motor 49.

FIG. 4 shows a state where the wheel cartridge 30 is lifted upward from the state shown in FIG. 3.

At this time, the gear 48 is rotated counterclockwise by the rotation of the motor 49, and the rack 47 meshing with the gear 48 causes the vertical lever 46 to rotate clockwise around 51 and is lifted upward. Wheel cartridge 3 Q i
t At this time, it is lifted upward by a pulling member 52 attached to the end of the up-down lever 46. Until now, the counterclockwise rotation of the storage table lock lever 53 by the spring 54 has been caused by the up and down lever 4 at the point 55.
6, but as shown in FIG. 4, the up and down lever 46 has risen to the position shown, so that it is released. In this way, the storage table lock lever 53
The convex portion 56 at the tip of the housing 41 fits exactly into the concave portion 50 of the storage table 41 . Here, the movement of the wheel magazine 40 in the longitudinal direction is completely fixed, and the position will not shift even if a small amount of external force is applied.

In FIG. 3, a bullet plate 59 and a disk portion 60 are attached to the tip of a shaft 58 of a wheel motor 57.
An annular groove is encircled at the tip of the disc part 60.This wheel motor part, which is equipped with zero or more constituent elements, reciprocates in the direction of the arrow by means of a guide means, which controls the up and down movement of the wheel cartridge 30 and the wheel. The movements of the motor units are linked, and the wheel motor unit waits at a position away from the platen 4 while the wheel cartridge 30 is in the wheel magazine 40, and when the wheel cartridge 30 is moved to the upper and lower levers as shown in FIG. 46 and reaches the height of the wheel motor shaft 58, it begins to move in the direction approaching the platen 4, and finally the hole 2 in the center of the wheel as shown in FIG.
0, the type wheel 1 corresponding to the key panel is attached to the wheel motor 5.

During a printing operation, when the wheel cartridge 30 is moved to a regular printing position by the movement of the carriage 2, a desired character is selected by rotation of the wheel motor 57.

A hammer 61 is located at the tip of the spoke 21 of the type wheel 1 on the side opposite to the platen 4, and this hammer 61 is driven by a solenoid 62, and the spoke 2
Hit the back of the type at the tip of ink ribbon 6.
4 to print on paper 3. 63 is a ribbon cassette, and the ink ribbon exposed part 64 is connected to the hammer 61 and the type mold 2.
4, it is attached at a position where ink can be transferred to the paper 3. 65 is a ribbon winding device, and the ink ribbon 66 is wound up by the ribbon winding device 65.

When the wheel cartridge 30 is lifted upward by the vertical lever 46, if the ink ribbon 66 is slack, there is a possibility that it will come into contact with the protrusion of the wheel cartridge 30, so the wheel cartridge 30 is lifted upward. If so, use a ribbon winding device 6 before lifting.
5, the ink ribbon 66 is spread in an appropriate amount to take up the slack.

[Description of the type wheel and wheel cartridge (Figures 5 and 6)] Figure 5 (a) is a front view of the type wheel, and Figure 5 (b) is a side view of the type wheel and a cross section taken along A-A'. FIG.

In the figure, the cylindrical inner circumferential surface 20 of the center hole is the type wheel 1.
This is for inserting the shaft of the wheel motor 57 that rotates the wheel. Back side of wheel 1 (Fig. 5(a)
The front side of the wheel 1 is flat from the center of the wheel to the tips of the spokes 21, but the front side of the wheel 1 has a step between the flat surface 22 and the flat surface 23.
The wall thickness of the plane 23 is thinner. plane 23
Spoke portions 21 having a thinner wall thickness than the outer periphery thereof extend outward at substantially the same angle in the circumferential direction, and a type mold 24 is formed at the outermost end of the spoke portions 21 on the front side. During printing, the back surface of the type mold 24 is struck with a hammer or the like, and the type surface of the type mold 24 is pressed onto the paper 3 wound around the platen 4 via an ink ribbon, thereby printing is performed.

FIG. 6(a) shows a wheel cartridge 3 consisting of an integrated configuration of a type wheel and a type holder that directs the type wheel.
FIG. The holder portion of the wheel cartridge 30 is basically composed of two parts, and a wheel front plate 31 and a wheel rear plate 32 are assembled in such a manner that the type wheel 1 is sandwiched therebetween. The connection is achieved by fitting six bosses 33 protruding from the wheel back plate 32 into six holes 34 in the wheel front plate 31 and welding them.

FIG. 6(b) is a side view of the wheel cartridge 30, and FIG. 6(e) is a sectional view taken along line BB' in FIG. 6(a).

At the center of the wheel back plate 32 is a hole 35 into which the shaft of the wheel motor 57 is inserted. The outer surface 36 of the wheel front plate 31 is completely flat. At the center of the wheel front plate 31 is a hole 36 that is sufficiently larger than the diameter of the flat surface 22 of the type wheel 1, and a part of the circle is cut out like a notch 37. The plane 36 also has six holes 34 for connection with the wheel back plate 32. Further, the upper end of the wheel front plate 31 has a shape shown by a line 38, and the type wheel is directly exposed above the boundary 38 as viewed in the drawing.

[Explanation of fIl1m block (Figs. 7 and 8)] Fig. 7 is a diagram showing the side surface of the carriage and control block of the electronic typewriter of this embodiment, and the same parts as in the previous explanation are indicated by the same symbols. .

In the figure, F0 is a sensor that detects the position of the storage table lock lever 53, and detects whether the wheel cartridge 3o is attached to the wheel motor 5F. When the protruding portion 73 of the storage table lock lever 53 blocks the light transmitting portion of the sensor 70 in the state shown in FIG. 7, it is determined that the wheel cartridge 30 is not attached to the wheel motor 57. F1
is a sensor amplifier that amplifies the output of the sensor 70, a CPU that performs 104 calculations, etc. to control the entire device, and a ROM that stores CPU control programs, data, etc.; serves as a work area for the CPU and temporarily stores data, etc. This is a control unit including RAM and the like.

73 and 74 are drive circuits for the motors 49 and 45, respectively. When moving the wheel magazine 40 in the direction of arrow E to the leftmost home position, the control unit 1
04 outputs a signal for rotating the motor 45 to the drive circuit F4, thereby moving the wheel magazine 40 in the direction of arrow E. While the motor 45 is operating, the control unit 104 inputs a signal from the home position sensor 76 via the sensor amplifier 77 to check whether the motor 45 has reached the home position. When the wheel magazine 40 reaches the left end and the protruding light shielding plate 75 of the storage stand 41 shields the light transmitting part of the home position sensor 76, the drive signal for the motor 45 is turned off. This causes the wheel magazine 40 to stop at the initialization position (home position). 78 is a sensor for determining the type of magazine 40, and 80 is a sensor for determining the type of wheel cartridge 30, both of which are reflective optical sensors.

FIG. 8 is a flowchart of the initialization process stored in the ROML of the control unit 104 when the power is turned on.

This program is started when the power is turned on, and first, in step 1, the sensor probe O checks whether the vertical lever 46 is lowered. When the vertical lever 46 is not lowered, the process advances to step S2, where the wheel motor 57 is attached and detached from the currently mounted wheel cartridge, and the mounted wheel cartridge is stored in the magazine 40 by the vertical lever 46.

If the vertical lever 46 is lowered in step S1 and step S3 is completed, the process proceeds to step s4, where the motor 45 is driven to move the magazine 4o in the direction of arrow E.
Move to the home position. When the sensor 76 detects that the magazine 40 has reached the home position, the magazine is moved by a predetermined amount in step S5 so that the end of the up/down lever 46 comes to approximately the center position of the magazine 40. Since the most frequently used type wheel is stored in this position, the most frequently used wheel will be selected.

Next, in step S6, as explained based on FIG. 3 and FIG. Raise the wheel motor 5 to the position of the
Install it on 7. In step S7, the mounted wheel is registered in the memory 105 as the most frequently used wheel, and in step S7
8, the position and type of the type wheel in the magazine 40 are stored in the area 106 of the memory 105 in association with each other.
When the above initialization processing is completed, step S9
Proceed to normal input and print processing.

As explained above, according to this embodiment, when the power is turned on, the most frequently used type wheel is installed, so printing work can be performed smoothly, and the most frequently used wheel is placed in the wheel storage. Being stored near the center of the means has the advantage that access time to its type wheel is reduced.

[Effects of the Invention] As described above, according to the present invention ε, since the most frequently used type wheel is automatically replaced when the power is turned on, there is a high possibility that the most frequently used wheel will be installed.
This has the effect that printing work can be performed smoothly.

[Brief explanation of the drawing]

Fig. 1 is a diagram showing a schematic configuration of the electronic typewriter of this embodiment, Fig. 2 is an external perspective view of the type wheel type electronic typewriter of this embodiment, and Fig. 3 is a diagram showing the outline configuration of the type wheel type electronic typewriter of this embodiment. A side view of the carriage of the printer section, Figure 4 is a diagram with the wheel cartridge slid upward, Figure 5 (a) is a front view of the type wheel, and Figure 5 (b) is a cutaway sectional view of the type wheel. , Fig. 6(a) is a front view of the wheel cartridge combined with the holder that supports the type wheel, Fig. 6(b) is a side view of the wheel cartridge, and Fig. 6(c) is the same as that of Fig. 6(a). FIG. 7 is a diagram showing the carriage of this embodiment and its control block, and FIG. 8 is a flowchart of the initialization process when the power is turned on according to the embodiment. In the figure, 1... type wheel, 2... carriage, 3
...Paper, 4-axis platen, 21-...Spoke, 2
4--Type mold, 30--Wheel cartridge, 4゜-Wheel magazine, 41--Storage stand, 44
... Gear, 45 ... Motor, 46 ... Up and down lever, 49 ... Motor, 53 Storage stand lock lever 157
...Wheel motor, 61-...Hammer, 62...
Solenoid, 63... Ribbon cassette, 66-... Ink ribbon, F0.76... Sensor, 73.74...
Medium drive circuit, 78.80...sensor, f1.7f, 7
9.81... Sensor amplifier, 100-... Keyboard, 101-... Display section, 102-... Printer section, 10
3... Wheel replacement section, 104-... Control section, 105
---Memory, 106---A storage area for the position and type of the type wheel. Patent applicant: Canon Co., Ltd. Figure 2 Figure 14 Figure 5 (0) Figure 5 (b) Figure 6 (0
)

Claims (1)

[Claims] A storing means for storing a plurality of type wheels and storing the most frequently used type wheels near the center, a key input means for inputting document information, and a desired type of type wheels selected and stored on a recording medium. a recording means for moving the storage means to select a type wheel corresponding to the input character type, and a mounting means for transferring the type wheel from the storage means to the recording means and mounting it thereon; A typewriter characterized by comprising means for selecting a frequently used type wheel and attaching it to the recording means.