JPS58138682A - Carriage mechanism of typewriter - Google Patents

Abstract

PURPOSE:To reduce the power of a driver by a method in which a printing mechanism and an erasing mechanism are provided in parallel and operated independently of each other. CONSTITUTION:A clutch drum 18 is turned by a drive motor 28b. During the printing period, current is supplied to the first trigger magnet 25a at a timing to stop the rotation of a printing wheel 47, and the coupling between an actuator 25 and the projection 16a of the first stopper 16 is released, whereupon the first clutch 26 is connected by the elasticity of a clutch spring 17. By this, the power from the motor 28b is transmitted to the second gear 14, the third gear 31, and the second cam 33, and when a horseshoe-shaped part 42 is dropped into the tier section 37 of a cam 33, a hammer is operated. On the other hand, when erasing operation is made, current is supplied to the trigger magnet 27a, the second clutch 28 is connected, the third cam 34 is turned, and the hammer is operated.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a typewriter carriage mechanism.

Traditionally, electronic typewriters or electric typewriters
Some printers are equipped with a printing mechanism and an erasing mechanism. In such a typewriter, a printing mechanism is connected to one motor via a clutch such as a spring clutch, and an erasing mechanism is connected in series to the printing mechanism via a switch that can be turned on and off. Therefore, during printing, the switch is kept in the OFF state and only the printing mechanism is operated, and the printing ribbon is shifted between the companion paper wound around the platen and the printing shaft, and the hammer is driven to perform printing. When erasing, hold the switch in position #a to operate the print mechanism and the 114-elimination mechanism at the same time, and ensure that the erase ribbon and print ribbon are superimposed from the paper side between the paper and the print shaft in good condition. At the same time as shifting, the hammer is driven to perform erasing. That is, the erasing mechanism does not include a hammer drive, and the printing mechanism is also operated during erasing, so that erasing is performed by the hammer drive in the printing mechanism. For this reason, when erasing, it is necessary to operate both the printing mechanism and the erasing mechanism, and the driving force of the motor needs to be set to a large value, resulting in disadvantages such as the complexity of the mechanism.

The present invention has been made in view of these points, and it is an object of the present invention to provide a typewriter carriage mechanism in which a printing mechanism and an erasing mechanism are provided in parallel and can be operated independently. .

The present invention provides a carriage frame with a first holding part that intermittently positions the printing ribbon between the paper wound around the platen and the printing shaft, and a second holding part that intermittently positions the non-erasable ribbon. a presser unit that presses the printing shaft toward the paper, a first clutch and a second clutch that are selectively and intermittably connected to the drive unit, and the first clutch is connected to the first clutch. 19; connecting the retaining portion to the suppressor and connecting the second clutch to the second retainer and the suppressor;
When printing, the rattan clutch is connected and the first holding part and the suppressor are operated to print, and when erasing, the second clutch is connected and the second holding part and the suppressor are actuated to erase. To make this possible, a gear and a single cam that rotate integrally around the axis are provided on the driven side of the hardened clutch, and the first clutch and the first holding part are connected via the striped cam. By connecting the first clutch and the suppressor through the gear and the second cam driven by the gear, the power transmission mechanism during printing is simplified and is reliable. A third cam and a fourth cam that rotate integrally around the axis are provided on the driven side of the second clutch so that power can be transmitted. By connecting the second holding part and the second clutch and the suppressing body via the third cam, the power transmission mechanism during erasing is simplified and the power transmission is ensured. In addition, a rounded first drive lever and a second drive lever are provided for transmitting the driving force to the suppressing body, and the first drive lever is interlocked with the second cam. A first spring that biases the pressing body in the direction of operating the sheet in the paper direction is attached to the drive lever of the irises, and the second drive lever is interlocked with the third cam, and the drive lever of the Wc rattan is Direction to operate the pressing body in the paper direction @W
By tensioning the second spring that biases C and setting the tension between the first spring and the second spring to an arbitrary value, the pressure of the suppressor toward the printing axis during printing and erasing can be reduced. The structure is such that the impact force can be set to an arbitrary value.

An embodiment of the present invention will be described based on the drawings.

The carriage guide shaft (1), which is disposed parallel to the axis of the platen (not shown), has a left frame (2), a right frame (3), a bottom frame (4), and a front frame (5).
) A carriage frame (6) is fitted with a salt 9 so as to be slidable along its axial direction. The left frame (2) and the right frame (3) each have a pair.
! A first hole (7), a second hole (8), and a third hole (9) are formed, and the first hole (7) K holds the first shaft (G). The second shirt (8) is held in the second hole (8), the third shaft (2) is held in the third hole (9), and these shirts (1) H (2) are held in the third hole (9).
) are parallel to each other and parallel to the axis of the carriage guide shaft (1). Both ends of the first shaft (roller) are screwed and fixed to the left frame (2) and the right frame (3), and the left frame (2) and the J[K,
First cam (2), second gear ◆, driven side clutch drum (to), first stopper (to), first clutch spring Q? ), drive side clutch drum), first gear wing, drive side clutch drum (E), second clutch spring @1, li2 stopper (2), driven side clutch drum wing, fourth gear ( (goods) are rotatably supported around an axis. Note that the first cam (to) and the second gear α◆ are integrally formed, and these cams (to)
The driven side clutch drum (2) is press-fitted and fixed to the gear α◆ and the gear α◆. First, the first gear (to) and the driving side clutch drum member are integrally formed, and the driven side clutch drum member is press-fitted and fixed to the fourth gear.

-Furthermore, the first clutch spring a''h is surrounded by the first stopper (c), and one end of the clutch spring (b) is engaged with the inner surface of the stopper (to) and is pushed and expanded. Clutch drum (to)
The other end of the clutch spring aη is wrapped and fixed around the outer peripheral surface of the driven side clutch drum (to).

Similarly, the second clutch spring is surrounded by the second stopper (2), with one end of the second stopper (2) lightly contacting the outer peripheral surface of the clutch drum (E) and in a slipping state. The other end of the clutch is wrapped and fixed around the outer peripheral surface of the front driven clutch drum (2).

Then, the driven side clutch drum (to), the stopper (
2), a clutch spring αη, a clutch drum), and a first actuator 4 (described later), a first clutch), and the driven side clutch drum (2)
, stopper (2), clutch spring 9m, clutch drum (e), and second actuator (2) to be described later.
A second clutch is constituted by the bottom frame (4) of the carriage frame (6) K
A motor (284), which is a drive unit having a motor mechanism (28), which meshes with the first gear (28) is fixed.Furthermore, the bottom frame (4)K is connected to the first actuator (284). A rattan trigger magnet is formed on the second actuator (e) and the second actuator (zsa) and the second stopper 4 to interrupt engagement with the protrusion (164) formed on the striped stopper 04. Protrusion <22
A second trigger magnet (2) that intermittents engagement with G)
7.) is fixed.

The second shaft Q end is rotatably provided on the axis 9 by fitting the keyed bushes 4 attached to both ends of the shirt (lη) into the holes (8) K, and nine shafts protruding outward from the frame (2) and the right frame (3))
A fourth cam (7
) is fixed and there are seven. Furthermore, this shaft 0IKFi
, 6 third gears between the left frame (2) and the right frame (3), a connecting part 0 hani, a second cam ring, a third cam (b), a connecting SW, and a fifth gear. (to) is pivoted. In addition, the gear 011, the connecting part (2), and the cam (to) are integrally formed and are rotatably provided around the axis of (In), and the gear (to), the connecting part (to), The cam (B) is integrally formed and fixed to the shaft α.The gear 01 is meshed with the gear α◆.
The gear is meshed with the gear. Further, two step portions 0η are formed at positions 1800 degrees apart on the outer circumferential surface of the cam (to), and the other portion is formed into a cylindrical surface, and one step is formed on the outer circumferential surface of the cam (b). Department (
) is formed, and the other portions are formed into cylindrical surfaces.

The carriage frame (6) has a fourth shaft member having an axis parallel to the shaft α, and a hammer shaft.
and a second hammer lever GL1 and a second hammer lever supported on the fourth shaft by drive levers each having a kick arm part and a hoof part (6). 1-1 is rotatably supported around an axis 9, and a hammer is fixed to the hammer shaft by a pressing body so as to be rotatable around the axis 9 together with the hammer shaft. It is provided. And, at a position facing the striking part of the hammer, there is a nine-printed pen that is removably attached to the front plate (5) of the carriage frame (6). A petal-shaped printing wheel (b) is provided. A KFi weight 1 is fixed to one end of the hen I, and a pair of left and right protrusions 1 are fixed to the other end, and these protrusions 1 are positioned to interfere with the kicking arm s of the hammer lever. It is provided. Furthermore, the above i
- One of the protrusions - A pair of locking holes (2) are formed at the end on the side where the ring is fixed, and one end of the spring@wheel is locked into each of these locking holes (■), and the spring@ The other end of the ring is fixed to the bottom frame (4) with nine triggers! It is locked to the actuator of the gunnet and urges the hammer in the return direction. The hammer lever
The hoof-shaped portion (■) is joined to the outer peripheral surface of the cam (to), and one end of the first spring that biases the kick arm (ml) to interfere with the protrusion is engaged with this hammer lever. -Similarly, the hoof-shaped S- of the hammer lever is joined to the outer circumferential surface of the cam (B), and the hammer lever is biased in a direction to cause the kick arm to interfere with the center rotation ring. One end of the second spring (■) is locked. The other end of these springs is fixed to a plate (6), and this spring (11)a is connected to the carriage frame (6) by the switching lever IIp and the guide wheel.
) is attached. The spring hanging plate has a hole in its center as shown in Figures 4 to 6.
A cam is fixed to the switching lever (2), which is connected to the inner circumferential surface of the hole and rotates nine times, and this cam shaft has a cam formed on the inner circumference of the hole. Convex portions that fit into the concave portions are formed at positions spaced apart by 180 degrees.

The third shaft (to) is rotatably held in the hole (9) K-axis rotation, and both ends thereof are connected to the left play (
2) and the right plate (3).

A cassette deck key, which is a first holding part located between the left plate (2) and the right plate (3), is supported on this shaft (2) so as to be rotatable about an axis 9, and this cassette The deck key is removably attached to nine cassettes that store printing ribbons.

The cassette deck key has a grooved cam bin and a ratchet (
to), the ratchet @ is connected to a ratchet under-reduction mechanism (not shown), and the ratchet shaft 0 is fitted to the feed shaft t4 that winds the printing ribbon (2) of the cassette (G'l). ing. Friend, the grooved cam pin (C) is formed on the cam (2) and is engaged with a round groove nK, and this groove (C) is formed in a nine-point shape. A first plate q and a second plate n, which are second holding parts, are provided at nine parts of the shaft (2) extending outward from the left plate (2) and right plate (3). The carriage frame (6) t is clamped and fixed. The plate 0 rotatably holds a spool 4 around which the erasing ribbon (c) is wound, and the plate (to) has a take-up spool 4 which winds the erasing ribbon (c) in the winding direction. 9, the spool 4 force ζ is biased and provided.
The erasing ribbon (94) is pulled out from the plate (3) and bent at the - corner of the plate (3), passes through the front of the petal-shaped printing wheel (2), reaches the plate (94) side, and is bent at one corner of the plate (94). and is wound on the take-up spool fIIJK. One wear-resistant chip (2) is attached to each of the plates (1) and (3), and these chips (11) are fixed to both ends of the second shirt (11), and the cam members (9) are joined to each other. has been done.

In such a configuration, first, the printing operation will be explained. When a character key (not shown) on a typewriter keyboard (not shown) is pressed, a type selection motor (not shown) is activated to rotate a petal-shaped printing wheel (b) to a predetermined position. . On the other hand, the motor (284) rotates in a good state to disengage the first clutch 4 and the second clutch (2). Then, at the timing when the rotation of the petal-shaped printing wheel @η stops, the first trigger magnet (25&) is energized, and the first actuator (E) is attracted by the trigger magnet (25a) K, and the fourth and fourth actuators The first stopper QQ is disengaged from the protrusion (16a). Then, the driving side end of the first clutch spring α comes into strong contact with the outer peripheral surface of the driving side clutch drum α due to its own elasticity, and the first clutch 4 is connected. As a result, the power from the motor (284) is transferred to the motor pinion (28), the first gear (2), the driving side clutch drum (2), the clutch spring, the driven side clutch drum (to), and the second The signal is transmitted to the gear α◆, the first cam (2), and then from the second gear α◆ to the third gear 0, whose gear ratio is -, to the connection sea, to the second cam (to). It is said that. The hoof-shaped part of the first lever, which is pivotally supported by the fourth shaft, is in contact with the outer circumferential surface of the second cam (to) while being biased by a spring. When the hoof-shaped part (6) falls into the stepped part (b) of the cam (to), the non-marepa 11 rotates around the axis of the shaft (to), and the kicking arm s1 ]) gaノ＼
By interfering with the protrusion of the printer and rotating the printer around the printer's axis, the striking part forms a petal-shaped printing ring.
? ) Press the back side of the printed characters - towards the platen. On the other hand, since the cam (2) rotates integrally with the gear α4, the grooved cam pin (c) engaged with the groove (c) of the cam (2) moves up and down in accordance with the rotation of the cam (2). The position moves, and as a result, the cassette deck key with the cassette attached thereto rotates in the vertical direction around the axis of the third shaft (6). When the ring is rotated upward, the ring is positioned between the print ring and the petal-shaped printing ring @η. Note that the hammer presses the back side of the type at the timing when the printing ribbon is positioned between the paper and the type, and printing is performed. The time for energizing the trigger magnet (1 & 26M) is determined to be sufficient to attract the actuator (c) and to allow the actuator (e) to return before the stopper Q has rotated 180 degrees. has been
- The rotation angle of the cam (to) and cam (to) by energization is set to 180' to prevent double hitting of I/N.

Next, the erase operation will be explained. To erase, first move the carriage frame (6) to the erase operation position using the rubber space key (not shown).When you press the character key of the character to be erased, the type selection motor operates and the petal-shaped Rotate the printing force to the specified position.Meanwhile, the motor (2g4) is connected to the first clutch (E).
and the second clutch (7) rotate in good condition. Then, at the timing when the petal-shaped printing wheel stops rotating, the second trigger magnet (27a) is energized, and the second actuator (support) is attracted by the trigger magnet (27a), and the second actuator (27a) and the second The stopper (goods) is no longer held in place with the protrusion (12m). Then, the drive side end of the second clutch spring eA umbrella comes into strong contact with the outer peripheral surface of the drive side clutch drum (E) due to its own elasticity, and the second clutch (2) is connected. This causes the ring 91. It is transmitted to the driven side clutch drum (to), the fourth gear (to), and from gear ■ to the fifth gear (to) with a negative gear ratio, the connection part (to), and the third cam (to). ), second shirt) QJ, transmitted to the fourth cam member. A fourth shaft (to) is attached to the outer peripheral surface of the third cam (b).
The hoof-shaped part (6) of the second hammer lever, which is pivotally supported by the spring, comes into contact with the spring while being biased, and the cam (B) rotates so that the hoof-shaped part moves into the step of the cam trout. When it falls into the position (to), the lever rotates 9 times around the axis of the shaft ■, and the kicking arm 1111 interferes with the protrusion cQK of the hammer.
By rotating the hammer around the axis of the hammer shaft, the striking portion presses the back surface of the type on the petal-shaped printing wheel (b) toward the platen. Also, Cam (To) plays) f・@
Since the tips rotate while being joined together, the plate (c) and the third shaft (6) rotate vertically together with the axis 9 of the shaft (6). Then, when it rotates upward, the erasing ribbon (
(to) is wound around the platen and is positioned between the nine sheets of paper and the printed characters to be erased. It should be noted that the hammer presses the back side of the type ring at the same time as the erasing ribbon is positioned between the paper and the type, thereby performing erasing. Well, trigger magnet (27
The time for energization to =) is determined to be sufficient to round the actuator (2) to attract it, and to allow the actuator (2) to return before the stopper (2) rotates 3,600 times. Cam (b), cam■
Rotation 1 Set the angle to 3600 to prevent the hammer 4 from hitting twice.
There is.

In this way, when printing, use the first clutch)
In the case of erasing by connecting only the second clutch (E) and operating only the printing mechanism, the force of the motor (284) may be small, since only the second clutch (E) is connected and only the erasing mechanism is operated. Durability is improved because the printing mechanism is sometimes inactive, and the structure is simple and assembly is easy.

Next, when printing or erasing, the biasing force that activates the hammer place is given by a spring @ wheel. When printing, only the first spring acts, and when erasing, only the second spring acts. By appropriately setting the tension of these springs tot4 separately, it is possible to separately set the impact force on the type during printing and erasing. Also, one end of the spring is locked to a plate, and by switching the plate, the spring r4 is guided by the guide in the direction of moving toward and away from the hammer lever.
Because it moves along the direction of tension, the spring @−
The tension of the spring can be adjusted without changing the tension angle of the spring. Furthermore, during switching, the movement of the spring is suppressed to a small extent, so the durability of the spring is improved.

Next, - times of printing or erasing operations are performed, and after death, the hammer curvature is returned to the direction away from the type wheel by the tension and force of the spring t4, thereby allowing the petals for the next printing or erasing to be carried out. It is designed not to interfere with the rotation of the shape printing wheel (b).

Furthermore, since these springs act in the direction of returning the hammer even when the hammer is driven, the impact force of the hammer can be controlled, and the tension of the spring r4- can be determined separately. At the same time, by individually operating the trigger magnets, the impact force of the hammer can be set repeatedly according to the printing area of the typeface. Therefore, the durability of the hammer and the petal-shaped printing wheel (
(b) Durability is improved.

As described above, the present invention provides a mechanism that operates during printing and a mechanism that operates during erasing in parallel, and only the mechanism that performs printing operates during printing, and only the mechanism that performs erasing operates during erasing. With this configuration, the power of the drive unit for operating each mechanism can be reduced, and
Since the printing mechanism does not operate during erasing, durability can be improved.Each mechanism is provided independently, making the structure simple and easy to assemble.A spring that applies pressing force to the printing shaft are provided separately on the printing mechanism side and the erasing mechanism side, so the tension of each spring can be determined separately and the pressing force of the suppressor during printing and erasing can be set separately, and the optimum printing pressure can be set. This has effects such as being able to obtain erasing pressure and improve the durability of the pressing body and printing shaft.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is an exploded perspective view with the carriage frame omitted, FIG. 2 is an exploded perspective view showing the printing ribbon attached, and FIG. 3 is the erasing ribbon. Fig. 4 is an exploded perspective view showing the tension switching mechanism of the spring that biases the hammer lever, and Fig. 5 is an enlarged view of the switching state with the spring tension maximized. Figure 6 shows an enlarged view of the condition when the tension of the spring is minimized and the switch is switched, and Figure 7 shows the installed state of the spring that biases the hammer in the return direction. FIG. 6... Carriage frame, 13... Cam, 14...
...Gear, 26...Clutch, 28...Clutch,
284...Motor (drive unit), 30...Cam, 3
3...Cam, 34...Cam, 43-44...Hammer lever (lK moving lever, 4s...Hammer (suppression body), 47...petal-shaped printing wheel (printing shaft), 58- 5
9...Spring, 68...Cassette attachment (holding part), 69...Printing ribbon, 76277...
Plate (holding part), 78... Ribbon for erasing Applicant: Tokyo Electric Co., Ltd. Procedural amendment (voluntary) January 13, 1925 Kazuo Wakasugi, Commissioner of the Japan Patent Office Case display tatami familiar @ if - No. 1040 No. 2 Typewriter Carriage Mechanism 3 Issued by @04 Person making the amendment Relationship to the case No patent applicant Regarding this application, the description and drawings in the specification are amended as follows. Note 1: In the specification, correct the [Trigger Mig *y) NilJ tr Hammer Control Magnet Cap 1 on the 13th line of the specification. 1 In the specification, the correction is made to "Trigger i magnet t4" on page 22, line 12. 3.Amend Figure 3 in the drawings as shown in the attached sheet.

Claims (1)

[Claims] 1. A carriage frame is provided that moves in the axial direction of the platen while holding the printing shaft, and the carriage frame is provided with a space between the paper wound around the platen and the printing shaft. A first holder for intermittently positioning a printing ribbon; and a second holder for intermittently positioning an erasing ribbon between the paper and the printing shaft, and A suppressor is provided on the carriage frame to press toward the carriage frame, a first clutch is connected to the first holding part and the suppressor, and a second clutch is connected to the second hold part and the suppressor. A typewriter carriage mechanism characterized in that two clutches are selectively and intermittably connected to a drive section. 2. The typewriter carriage mechanism as set forth in claim 1, wherein the first clutch and the second clutch are provided on the same axis. 3. 4 of the typewriter carriage mechanism according to claim 1i #11, characterized in that the first clutch and the second clutch are arranged on the same axis with their driving sides facing each other; A carriage frame that moves along the fine direction of the platen while holding the printing shaft is provided with a suppressor that presses the printing shaft toward the paper wound around the platen, and the carriage frame is provided with a suppressor that presses the printing shaft toward the paper wound around the platen. A first holding part for intermittently positioning the printing ribbon and a second holding part for intermittently positioning the erasing ribbon are provided between the shaft and the first holding part, and the second holding part is selectively and intermittently connected to the drive part. 2
) A first clutch and a second clutch are provided, the second clutch is connected to the second holding part and the suppressing body, and the shaft center of the two is connected to the driven side of the first clutch. A gear that rotates around the circumference and a first cam are provided, and the first holding part and the first clutch are connected via the first cam, and the first clutch and the suppressing body are connected to each other. A carriage mechanism for a typewriter, characterized in that the carriage mechanism is connected via the gear and a second cam driven by the gear. & A carriage frame that moves along the fine direction of the platen while holding the print shaft is provided with a suppressor that presses the print shaft toward the paper that has been rotated nine times by the platen, and A string holder for intermittently positioning the print ribbon between the paper and the printing shaft and a second holder for intermittently positioning the erasing ribbon may be provided to alternatively and intermittently position the printing ribbon. A first clutch and a second clutch are provided which are freely connected to the drive S, the first clutch is connected to the holding part of the string and the suppressing body, and the driven side of the second clutch is connected to the holding part of the string and the suppressing body. is provided with a third cam and a fourth cam that rotate integrally around the axis, and connects the second holding part and the second clutch via the fourth cam, and A typewriter carriage mechanism in which the suppression body and the second clutch are connected through a third cam. 6. A carriage frame that moves along the fine direction of the platen while holding the print shaft is provided with a suppressor that presses the print shaft toward the paper wound around the platen, and a driving force is transmitted to the suppressor. A first drive lever, a second drive lever, a second cam, and a third cam are provided, and a printing ribbon is intermittently positioned on the carriage frame between the advance paper and the printing shaft. providing a first holding part and a second holding part for intermittently positioning the erasing ribbon, and also providing a first clutch and a second clutch that are selectively and intermittently connected to the drive part; The first clutch is connected to the first holding part, and the first clutch is connected to the suppressing body via the second cam and the first drive lever, and the second clutch is connected to the suppressing body. The second clutch is connected to the second holding part and the suppressor is connected to the suppressor via the second cam and the second drive lever, and the suppressor is connected to the first drive lever. A first spring biased in a direction to actuate the suppressor in the paper direction is tensioned, and a second spring biased in a direction to actuate the suppressor in the paper paper direction is tensioned on the second 1 drive lever. The carriage mechanism of a typewriter that produces mold.