JPS59501351A - printer - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] TECHNICAL FIELD This invention relates to printers, and more particularly to daisy wheel printers.

In recent years, great progress has been made in the development of computer printer output devices. very heavy One important advancement is the generation of typewriter-like print output, but it is very The development of a daisy-wheel printer that operates at high speeds.

Such printers are particularly used in word processing equipment, but their use is not limited to this. It's not something you can do.

In this type of printer, the shape of each individual character or symbol is The edges are embossed. This wheel prints the desired betal. Between the lenoid and the platen, which traditionally takes the form of a rubber-covered roller. It is attached to a spindle so that it can be rotated to bring about the desired results. with petal end An inked woven ribbon or carbon film ribbon is placed between the rollers. Place a suitable ink application member and the paper or other paper you want to print on. There is. The print solenoid is actuated when the desired bevel is in place. The edge of the petal is pressed sharply towards the platen so that the The embossed symbol forms a mark on the paper or the like at a desired location.

A daisy wheel, a positioning mechanism for the daisy wheel, and a print software. Assembling the lenoid, use a longitudinal axis parallel to the axis of the platen to create a row of IJ components. It is built on a carriage that can travel along a road.

The carriage is usually in the form of a cassette that houses the supply and take-up spools. The carriage carries an inking ribbon or film ribbon. The paper also works in conjunction with the platen to move the paper, etc., around the platen into contact with the platen. One or more retains to improve print quality as well as reduce noise It can carry multiple paper guides.

Based on the above description and research on known daisy-wheel printers, the platen In front of the carriage, a number of individual elements are disposed in and around the carriage. The carriage and platen are always in close proximity, and of course the end of each petal Improve speed and print quality by minimizing the amount of travel parts have to travel It is clear that they must be close to each other.

This density of elements is a real disadvantage in terms of maintenance. , i.e. the daisy wheel needs to be cleaned regularly and The daisy wheel must be removed from the printer and replaced. Yes, and in addition, if you want to print continuous text using different typefaces. The daisy wheel must be replaceable. This problem can occur especially when This is the case with office word processing equipment. In such applications, the operation Ease of operation and maintenance is of primary importance.

According to a first feature of the invention, an elongated tube for supporting the paper to be printed is provided. includes a platen and a print carriage, the carriage moving parallel to the platen; the daisy wheel and the daisy wheel in the desired position. means to bring one of the daisy wheels to the platen when driven. a print solenoid adapted to move the print solenoid toward the The carriage is parallel to the platen within the frame, but the carriage is parallel to the platen. are mounted for rotation about spaced axes, and the carriage in the printing position very close to the platen and the carriage allows easy access to the daisy wheel as it can be swung away from the The printer is provided including means for.

Usually the platen is in the form of a rubber covered roller and a carriage are mounted on tracks parallel to the roller axis. This track is Similarly, an axis around an axis that is parallel to that axis but distant from this axis. (This can be supported in a frame that can pivot. Preferably, the The frame is pivoted to a second frame within which the roller itself is mounted, and the frame and a second frame define a position in which the carriage and platen are in close proximity to each other. It has cooperative stop means.

the rotation in which the frame and the second frame are rotated relative to each other; The moving axis can be defined by the axis Iζ along which the carriage itself slides.

The part of the carriage away from the platen runs along a rail that forms part of the frame. can carry a slidable foot. In a particularly preferred embodiment, The frame and the secondary frame are the respective stops facing each other under the biasing force of the spring. It is held together with the member. One particularly preferred arrangement for arranging the biasing of said springs is The method consists of a tensioning mechanism with each end pivotally connected to a frame and a second frame section, respectively. A spring is provided to connect this pivot connection point and the hinge axis between the frame and the secondary frame. are substantially colinear when the carriage is swung away from the platen. It is to do as above. Such a structure has a frame and a sub-frame. is particularly advantageous because it does not require separate locking means to hold against each other .

The front of the carriage is in contact with the platen when the carriage is adjacent to the platen. Work together to establish a narrow path for paper, etc. and follow it while printing. capable of supporting the paper guide means to hold it firmly against the tens; The top surface of the cartridge may be covered with, for example, an inked woven ribbon or carbon film ribbon. It is appropriate to take the form of a tape that accommodates a bong or a ribbon cartridge that accommodates a ribbon. Probably. The cartridge is secured in a known manner by suitable friction or spring clip engagement. It can be held in place at the top of the carriage and changed when it is on the top of the carriage. easily accessible. The carriage is inside the darning cartridge. A means for advancing the ribbon may be included. In the past, ribbon The advance is generally mounted within the carriage and corresponds to the actuation of a print solenoid. This is done by using a stepping motor or the like that is driven by a motor to move the ribbon forward. It was being taught. This approach is an expensive and cumbersome mechanism, and requires a suitable power supply. It is necessary to have a supply source.

According to another feature of the invention, the printer includes a drive mechanism for advancing the take-up spool. is provided, but this drive mechanism is l. Continuously rotating drive means 2. A drive winding mechanism that is normally disengaged from the continuously rotating drive means. 3. A rest position in which the drive winding mechanism is disengaged from the continuously rotating drive part; a catch having an active position in which the drive winding means engages the continuously rotating drive; mechanism in which the drive winding mechanism rotates only a predetermined number of times before returning to the rest position. A release prevention mechanism and 4. To trigger the lock mechanism into its active state in response to movement of the thrust member. means of It consists of

Such a mechanism is driven by, for example, a print solenoid (here the solenoid itself is driven). (the body may be referred to as a thrust member) and is driven at the same time as a thrust member of the above-mentioned type. Provides flawless tape or ribbon drive in printers. however, The ribbon drive mechanism I just defined may only be used for printers like this. It is desirable to feed the print ribbon etc. forward intermittently according to other operations. It should be noted that it can be used with any similar device. It takes Examples of other devices include electric and electronic typewriters-1 calculators, Telek machines and other electronically controlled print output devices.

The drive take-up mechanism is for the take-up spool within the cassette or when the cassette is used. If this is not possible, support a suitable drive dog for the separately mounted take-up spool. You may hold it.

Generally, this gives a standard angular motion for the take-up spool in the cassette. The take-up spool can be moved each time the print solenoid is actuated by angular movement. It is desirable to be able to do so. This means that in the drive mechanism just defined, the output A ratchet wheel with regular tooth profiles is installed on the force drive shaft, and intermittent drive is possible. This ratchet wheel is advanced by one or more teeth each time the This can be achieved by arranging the Particularly preferred drive mechanism In a preferred embodiment, the drive mechanism is a Motor drive means for continuously rotating the drive pinion b Ratchet wheel mounted on the output drive shaft for the spool Engageable with the C6 drive pinion and around the ratchet wheel axis an eccentric axis defined by a stub shaft extending from one end of the rotatable rank A drive wheel d, which is rotatable around the It engages the ratchet teeth and also moves the ratchet wheel in response to the arcuate movement of the crank. Claw that separates one tooth at a time e. Stop body with drive wheel f, a temporary body which can be engaged with a stop body to stop the rotation of the wheel, and which has a pre-mounted body; The pinion disengages from the stop body as the motor is driven, and the pinion is continuously driven. Therefore, the wheel can be rotated until the stop body and the temporary body engage again. a temporary object that is movable, and g. Engagement of the wheel with the drive pinion after the stop body and the temporary body have engaged The body is moved so that it disengages from the stop body, and the body is moved to disengage from the stop body. to provide a force to return the wheel to engagement with the drive pinion when Consists of adapted spring means.

In such a structure, the pinion and drive wheel are toothed gears, and the drive Since the gear has a toothless part, it cannot be driven at a certain angular position with respect to the pinion axis. I can't move it.

The stop body engages with the stationary member to accommodate the crank member on which the drive wheel is mounted. Preferably, it is provided on the crank which defines the arcuate displacement. Its position is the driving wheel The crank member is moved slightly before the position where the stop body member engages with the temporary body. The spring means act against the drive wheel to limit the movement of the drive wheel. The drive wheel is rotated around its eccentric axis to rotate the stop body into engagement with the stop body. It should be something that you can rotate around.

The stop body is directly connected to the print solenoid, and the print solenoid is driven. The stop body is moved each time the drive gutter groove indexes the ribbon forward to the desired degree. It is good to ensure that. Continuous drive requires an intermittent drive mechanism that is part of a solenoid. The extent to which a single cycle can be completed within a minimum time between the series of drives. should be sufficiently early. By doing this, the ribbon or type A new portion will be ensured to be used for printing each successive character.

The pinion and drive wheel may be toothed gears or one end may be a flat cap. The other side can be used as a wheel with tires, or both can be used as wheels with tires. You can also use it as

As described above, the main advantage of the present invention is that the daisy wheel can be replaced easily. It is easy to do. This means that the lifting lever, which has a central fulcrum, position the arm against one side of the fulcrum on the carriage. – located adjacent to the rear of the wheel and against the plane of the daisy wheel. A lifting lever 1. adapted to move in a substantially vertical direction; tso (7) The end is on the other side of the fulcrum so as to be accessible for producing such movement. This can be made even easier by The most convenient thing is two arms are located on each side of the central support hub where the daisy wheel engages and on the lever. The other end is disengaged from engagement with the hub when moved, for example by a fingertip. It is adapted to push the Jeebo wheel. The lever is a daisy wheel Place the spring in the position where the arm lies at the maximum distance from the back, for example 1 to 2 meters away. It is preferable to energize with. With proper positioning and design, such levers can , by resting the daisy wheel from its standard support hub engagement position on the hub. by moving it to a relaxed position from which it can be easily lifted. This can greatly and effectively facilitate the removal of the daisy wheel.

In particular, the traditional drive dog with the hub is an alignment point on the daisy wheel. It is disengaged and disengaged.

The invention will be further described by way of example with reference to the accompanying drawings, in which: FIG.

FIG. 1 is a side schematic diagram showing a part of a daisy-wheel printer according to the present invention. Ru.

FIG. 2 shows a portion of a daisy-wheel printer also constructed in accordance with the present invention. FIG.

3 is a top view of a portion of the printer illustrated in FIG. 2; FIG.

FIG. 4 is a schematic side view of another embodiment.

5 is a front view of the embodiment of FIG. 4, seen from the right side of FIG. 4. FIG.

FIG. 6 is a plan view of the embodiment of FIGS. 4 and 5. FIG. and, FIG. 7 shows the ribbon advancement on the carriage of the printer illustrated in FIGS. 4 through 6. FIG. 3 is a schematic bottom view of the mechanism.

In FIG. 1, the daisy wheel 10 is a carriage in the main frame of the printer. Step-motor mounted in 16 Spindle of drive unit such as 14 It is shown mounted on the handle 12.

The carriage is slidable along a circular cross-section rod or axis, . , one of which is mounted on the rod or shaft by a bearing designated by 20. ing.

Behind the daisy wheel 10, place the highest daisy wheel petal on the platen. A solenoid 22 is located for moving toward 24.

The carriage 16 is mounted on a rail located along the upper edge of the rotatable frame member 30. It is held in the position shown in FIG. Ru.

Frame member 30 pivots about axis 82 and spring 34 is biased counterclockwise around the

The frame member 30 can be grasped and biased clockwise around the shaft 32. Then, release the foot 26 from the rail 28 and move the carriage around the axis of the rod 18. , lower the foot part 26, and then move the daisy wheel 10 onto the platen. 24 and tilt it to be more relative to the daisy wheel 10. You can get your hands close together.

A locking mechanism (not shown) holds frame member 30 in its clockwise rotational position. and the carriage rotates around the rod 18. Thus, when lifted, the drive between the locking mechanism and the carriage 16 or similar The foot 26 must re-engage the rail 28 in order for the mechanism to unlock the lock mechanism. become.

Another embodiment is illustrated in FIGS. 2 and 3.

Here, the sub-frames are two parallel spaced ones, one indicated by 34. and two rods 36 and 88 extending between the two side plates 84. B The rods 36 are circular in cross section, one on the side of the main frame indicated by 40. It protrudes through a bearing supported within the plate, so that it does not lock against the main frame 40. It is rotatable around the axis of the door 36.

Referring to FIG. 3, the secondary frame also includes outer side plates, one of which is indicated by reference numeral 42. Similar plates of this type are used for rods 36 and 38. It is provided on the outside of the side plate of the sub-frame corresponding to the plate 34 at the opposite end.

Each outer plate 42 includes a folded upper edge and has an outwardly facing surface such as 44. It forms a flange, the purpose of which will be described below.

An L-shaped locking member, generally indicated at 46, is attached to each outer plate 42 by rivets or the like 48. are pivotally connected and each dove-shaped member includes an angled leading edge 50 that At the rear, it can engage with a pin 54 fixed to the main frame panel 40. A slot 52 is located.

The engagement of the pin 54 in the slot 52 causes the outer plate 42 to retain the axially connected position of the rod 36. Rotation in the counterclockwise direction (as shown in FIG. 2) is instead prevented. Ba A screw 56 is attached to the upright portion of the L-shaped member 46 at a point indicated at 58. , the other end of the spring 56 is attached to the side plate of the subframe at a location indicated by 60. It is being

The side plates are conveniently cut out as shown at 62 to accommodate the springs.

Due to the tension of the spring, the secondary frame consisting of plate 34 and rods 36 and 38 is rotated. biased generally clockwise about the axis of the head 36 and upwardly of each side plate 34. The front end is bent outwardly to form a first stop 64 and further to the side panels of the main frame. The corresponding rear edge of the flannel 40 is similarly bent as shown at 66 to form a second It forms a stop body. Pin 54 engages within slot 52 of L-shaped locking device 46 At this time, the two stop bodies 64 and 66 are in a close immediate relationship, and the spring 56 are held firmly against each other by the action of

The secondary frame is L-shaped and extends forward in the direction of arrow 68 with respect to the upwardly projecting portion of the bar. It can be tilted counterclockwise about axis 86 by pushing . do that In some cases, the side plates at both ends of the sub-frame are such that the lower edges of the plates as shown at 34 are Rod 3 until it hits a stop (not shown) that indicates the lowest position of the secondary frame. It becomes free to rotate in a counterclockwise direction around the axis of 6.

In this position it is supported by the secondary frame and the two rods 36 and The carriage slidable along 38 tilts by the same amount, thereby causing the secondary frame to is a carriage tilted about the axis of the rod 36 and housing the daisy wheel. make some parts more accessible.

The outwardly directed flange 44 allows the secondary frame to rotate around the axis of the rod 36. The L-shaped bar is then lifted and tilted in the opposite direction to re-engage the pin 54. can be set.

A notch in the leading edge of the outer plate 42 aligns with the stop 60 and normally 0, the outer plate 42 is the original position for the inner plate 34. The position of the inner plate 34 is determined by the position of the stop bodies 64 and 66 for the time being. It is determined only by

Also due to the gap between the cutting edge 70 and the stop body 66, when lifted The outer plate 42 can be rotated slightly more than the inner plate such as 34; Therefore, the L-shaped bar 46 can engage the pin 54. When the outer plate is moved Immediately, under the action of spring 56, outer plate 42 moves into its position as shown in FIG. returns to the normal position, and this is caused by the action of the spring 56, which causes the inner plate 34 and the A secondary frame formed by heads 36 and 38 is mounted on the secondary frame. the exact position where the carriage is very close to the platen (not shown). keep it in place.

Referring now to FIGS. 4-6, these drawings show a printer according to the present invention. A preferred embodiment is schematically depicted.

This printer has a main frame with an end plate 202 that rotates the platen 200. It is equipped with a sea urchin. a platen arranged to drive the platen in a known manner; A drive motor 204 is mounted adjacent one of these plates.

Paper guides 206 and 208 are mounted adjacent to the platen, and guide 2 06 has a number of free rollers 210 and 212 set therein. Plate The tube is foam-filled and has an outer rubber coating for noise suppression. Made of metal tube.

end plates 22 connected to each other by rails 222 and pivoted on an axis 224; 0 is attached to the main frame, and the shaft 224 is attached to the main frame. The main frame and the sub-frame are connected by a hinge.

The carriage is mounted for sliding movement along axis 224. carriage Basically, it consists of two side panels 230 and a roof panel 232. Inside A plastic block 234 having a slot in the platen portion that engages the rail 222 is attached to the platen. It is attached to the edge of the roof board that is farthest from the engine. Each plate 230 has a button inside. A bushing is provided, and a shaft 224 passes through this bushing. Inside the cassette A continuously driven DC motor 236 for advancing the ribbon of the It is located vertically within the ridge. Motor 236 is continuously driven on its output shaft. The roller 238 has a roller 238 that is It constitutes a power source for an intermittent drive mechanism of the type described below.

Print solenoid 240 having a drive member 242 forming a print hammer is mounted on the plate 232.

A front plate 244 having a hanging portion 246 is attached between the plates 230. The hanging portion 246 of the spindle runs in a loop between the spindles 250 and 252. A wire 248 is attached. Spindle 252 is an idler spindle. and the spindle 250 is driven by a carriage drive motor 252. is driven to move back and forth along axis 224.

The plate 2441 is also equipped with a drive motor 256 for driving the daisy wheel. However, the end of the daisy wheel petal is printed with solenoid 240. It is brought to lie just in front of the hammer 242.

The front of the carriage has two plastic paper guides mounted on the front. However, these guides allow the carriage to operate as shown in Figure 4. A concave surface that can lie very close to the platen 200 when in position. It has a curved surface.

Each plate 220 is operatively hinged to one of the two plates 202 by a rod 224. has been done. Plates 220 and 202 have half flanges 270 and 272, respectively. formed respectively. The immediate parts of these flanges are in a consistent and repeatable manner. The operative position of the carriage relative to the platen is determined by Board 2 each Tension attached between spigots 276 and 278 on 20 and 202 It is maintained for the time being by a spring 274. If the plate 220 is pushed downwards, As shown in FIG. 4, rotate the center of the shaft 224 clockwise. When rotated, the spigot 276 has two spigots, as shown in FIG. and the axis of shaft 224 are moved downwardly to a point where the cut and the axis of shaft 224 are substantially collinear.

In this position the spring has no tendency to move back up the plate 220 and The front of the ridge is manually accessible. At this time, Daisy Wheel Remove from standard shaft on motor 256 and replace or clean. It can be cleaned and restored.

To facilitate removal, a crank-shaped lever is provided as before. This lever pivots about a vertical hinge bin mounted on the front plate 244. child The lever swings to form a Y shape, and the two arms of the Y shape connect the plate 244 and the dizzy hoop. Preferably, it lies between the rear surface of the eel itself. The other end of the lever is It can be taken out from the side of the carriage and is in fact shown at 282 on FIG. It can be rotated around the sides like this. Pull the end of lever 282 away from the platen. or if the lever is clamped around the corner of the carriage frame. If it is curved, turn the end of the lever to the left as shown in Figure 5. When moved, the Y-shaped arm makes it easier to disengage the daisy wheel from the hub. to save.

The daisy wheel can then be easily and easily lifted by hand.

A special feature of the configuration illustrated in FIGS. 4-6 is that the entire unit is 288, but can be incorporated into the outer casing as schematically shown at 288. Acoustically, it can be sufficiently isolated from the casing. for example, The bottom of the main frame, shown at 292, connects to the casing via an acoustically damping rubber bushing. can be mounted on the base. The casing must be lowered on a hinge. and grab the spigots 290, one attached to each plate 220. It can have a front part with a pair of walls on the inside that can be moved. Wear. The shape of this wall 1 is illustrated by the casing section designated 288 in FIG. with the spigot 290 in the position shown and the plate 220 in the position shown. Even if it is within the wall height, it does not come into contact with any wall of the wall partition. death However, when the front part of the casing is rocked downward, immediately after this rocking movement, until one wall of the wall abuts against the spigot 290 at each end. , and then subsequent downward movement of casing portion 288 causes spring 274 to pivot. The plate 220 is moved downward until it reaches a neutral position intersecting the axis of the plate 224. However, in this neutral position you can, for example, change or clean the daisy wheel. or to replace the ribbon cartridge that fits on top of the carriage. can be used.

The ribbon cartridge can be easily seated on plate 232, and the ribbon cartridge can be easily seated on plate 232. A drive shaft carrying a take-up spool can protrude through it.

The ribbon within the cassette is driven by a continuously driven motor 2, as mentioned above. 36 via an intermittent motion device. The intermittent motion device is driven at point 29 6 and extends toward the drive roller of the motor 236. 298 and extending upwardly into a transverse hole 300 formed in the print hammer. a release lever having an arm having an engaging cranked end; It is done.

Referring now to Figure 7, this figure shows the A ribbon intermittent advancement mechanism is illustrated.

In the drawings, reference numeral 110 indicates a continuously rotating motor mounted on a motor shaft 112. A driving unit 110 is shown.

When using a printer, the motor is a simple and inexpensive C motor that is continuously driven. be.

The pinion has teeth 11 complementary to teeth 116 formed around the wheel 118. 4 is formed, and this wheel is mounted to rotate around an eccentric axis. and is supported by a stub shaft 120 extending from the crank 119. ing. The crank 119, as well as the ratchet wheel 122, Rotates around an axis fixed relative to the carriage. Ratchet wheel 1 22 and crank 119 together constitute an output drive shaft for the mechanism @124 (outlined with dashed lines). The upper end of the shaft 124 is a ribbon It carries a drive dog that engages a take-up spool within the cartridge.

Ratchet wheel 122 can rotate in the direction of arrow 126, but In the opposite direction, a pawl 128 carried on the end of the lever 130 is bent in the shape of a lever. This lever 130 is pivoted at 132 so that it cannot rotate (although it is shown here). However, due to the natural elasticity of the arm 130 and the stop in the form of the post 136, the tooth is prevented from disengaging from the Spring 134 connects strut 136 and wheel 1 18 and a central spigot 188 extending axially from the central spigot 188. stretching in between. The spring 134 provides a certain degree of restoring force to the crank 119. In addition to preventing the crank 119 from moving counterclockwise by the stop body 121, Rotate wheel 118 about its eccentric axis 120 when blocked. It also works to make you feel better.

A temporary member 142 which is rotatable about an axis indicated at 144 is generally attached to the bin 140. The rotation of the wheel 118 is prevented because it acts as a stop body for the rotation of the wheel 118. Ru. Bin 140 is shown abutting end 146 of member 142.

The end 146, when driven, moves in a direction perpendicular to the plane of the drawing and the wheel Stay away from 118.

The teeth 116 are not provided around the entire circumference of the pinion 118, but rather around the pinion 118. 40 aligns with toothed pinion 110 as it approaches end 146 of member 142. A toothless area 148 is left.

When teeth 116 disengage and disengage from teeth 114, wheel 118 typically rotates further. However, the teeth may not actually reach the position shown in the diagram. 138 is disengaged only after it has moved beyond the eccentric axis 120 of pinion 118. Therefore, the spring force of spring 134 causes bottle 140 to impinge on end 146 of member 142. The wheel 118 will continue to rotate until it reaches the end.

In this state, no drive is transmitted to the wheels 118. As a result, the output shaft 124 tends to remain stationary.

Member 142 is one end of the lever, and the other end of the lever is the plan of the printed solenoid. It is centrally supported within Japan. In this way, when the print solenoid is driven, This lever is moved and rotated about axis 144 and the end 146 is rotated with the wheel. 118 to disengage the spindle 40. This time, the spring The spring force at 134 causes wheel 118 to rotate about axis 120 in the direction of arrow 152. It starts rotating clockwise. This rotation of wheel 118 causes the teeth of the wheel to The attached portion comes to re-engage the teeth around the pinion 110 and the pinion Since 110 is rotating, the toothless region 148 of the pinion is Continue to rotate wheel 118 through the entire cycle until it is re-aligned.

Wheel 118 is mounted eccentrically about axis 120 so that the wheel 118 is applied by a spring 134 which tends to maintain the pinion 118 in meshing engagement with the pinion 110. As the wheel rotates around axis 120 as a result of the spring During the entire cycle of rotation, axis 120 moves away from pinion 110 and then It is displaced back again towards the pinion 110. As a result, the crank 119 Displaced in an arc with respect to its fixed stop 121 and on the crank 119 The carried spring pawl 139 moves in the direction of arrow 1 during the first half of the circular motion of the wheel 118. The ratchet wheel 122 is divided in the direction of 26. during the remaining half cycle The return movement of the wheel causes a reverse movement of pawl 139, while pawl 128 is ratcheted. The wheel 122 rotates in the opposite direction (i.e., counterclockwise as shown). It prevents

Instead of spring pawl 139, a separate pawl is attached to the ratchet on ratchet wheel 122. Spring means may be provided for engagement within the tooth. However, what are nails? Rather than providing different spring means, engagement with the teeth around the ratchet wheel 122 It is preferable to form the nail itself with an elastic material that has an inherent springiness that maintains the joint. .

By changing the degree of opening of the axis 120 with respect to the center ζ of the wheel 118, It will be appreciated that the angular movement of crank 119 can be varied. The eccentricity is A crank is used to determine the ratchet wheel 122 by the total number of tooth pitches. A sufficient amount of arcuate displacement of the link 119 should be obtained. This way When the retaining pawl 128 Because it engages correctly with the new ratchet and foot teeth, no matter what kind of backlash occurs, I don't.

If the teeth on pinion 110 and wheel 118 are removed and the tire is mounted around one or the other wheel, (or both) depends on the friction between the tire and the smooth cylindrical surface or the tire on the other member. It will be seen that the driving force is transmitted in the same way as in the case of teeth. This strategy is adopted If used, the minimum radius of the wheel 118 from the eccentric spindle 120 is a radius smaller than that required to create a driving engagement between the wheel and pinion; As a result, in one position and preferably on either side of said minimum radius In the immediate position range, the pinion has no driving engagement with the wheel. You need to make sure that. The wheel 118 has an eccentric axis 120 and a pinion. 110 with respect to the position of the smallest radius lying between axis 112 of pin 140 It is also necessary to ensure that the stop 146 comes to rest immediately.

The position of the stop body 121 is determined by the rotation of the wheel 118. Crank 11 in a position sufficiently far in advance to break out of engagement with On 110. 9 engages this stop at the end of its return stroke, while point 1i8 Continuous rotation of wheel 118 beyond the eccentric center of rotation 120 and restoration of spring 134 is secured under a force to bring pin 140 ultimately into contact with stop 146. International survey report on countries that like to Inferna+61) ^ppe-++ RonNo, PCT/GB8310004 0ANNEX To Thc rNTERNATIONAL 5EARCHRE Continuation of PORT ON page 1 [Yes] 8203861

Claims (1)

[Claims] 1], an elongated platen for supporting paper to be printed, and the platen The daisy wheel is mounted to move parallel to the daisy wheel. Means for bringing the wheel to the desired position and when driven A print sole that allows one beta of the eel to be moved towards the platen. In printers that include print cartridges that include a frame (here, around an axis parallel to the platen but distant from the platen) The carriage is rotatably mounted to the platen, and the carriage is Can maintain the print position and swing the carriage away from the platen Contains means to facilitate access to the daisy wheel as printer. 2], the platen is a roller covered with an elastic cover and the carriage is It is mounted on a track parallel to the axis of the roller, and the track is A frame that can rotate around an axis that is parallel to the roller and spaced apart from the axis of the roller. A printer as claimed in the supporting claim 1. 3) The frame is pivotally supported by a second frame to which the roller itself is attached. The carriage and platen are close to each other in the frame and the second frame. The printer according to claim 2, further comprising cooperating stop means for determining the position of the printer. 4] The 6th frame and the second frame have their respective stop members mutually connected under spring bias. 3. The mold printer according to claim 3, wherein the mold printer is held in contact with the mold. 5], the spring bias is such that each end pivots on the frame and the second frame part, respectively. Provided by a tension spring connected to the pivot point and the frame and secondary frame. The hinge axis between the carriage and the platen is pivoted so that the carriage moves away from the platen. 5. A printer as claimed in claim 4, which at times is substantially in a straight line. 6], the front of the carriage cooperates with the platen when the carriage is adjacent to the platen. to create a narrow passageway for the paper, etc., and follow it to guide the plate while printing. Claims 1 to 3 support a paper guide means that is firmly held against the paper guide. The printer according to any one of paragraph 5. 7), 1. Continuously rotating drive means 26 A drive winding mechanism that is normally disengaged from the continuously rotating drive means. 3. A rest position in which the drive winding mechanism is disengaged from the continuously rotating drive part; a catch having an active position in which the drive winding means engages the continuously rotating drive; mechanism in which the drive winding mechanism rotates only a predetermined number of times before returning to the rest position. A release prevention mechanism that enables 4. To trigger the lock mechanism to its active state in response to movement of the thrust member. means of A drive mechanism for advancing the take-up spool in a printer consisting of 8], comprising a drive mechanism according to claim 7 and driven by a print solenoid. The solenoid itself is a thrust member. A printer that is. 9], includes a ratchet wheel with equally spaced teeth on the output drive shaft, and an intermittent The ratchet wheel advances one or more teeth each time the drive is actuated. 8. The drive mechanism according to claim 7, wherein the drive mechanism has a structure in which: 10), a. Motor drive means for continuously rotating the drive pinion Ratchet wheel mounted on the output drive shaft for the spool engageable with the C0 drive pinion and around the ratchet wheel axis. an eccentric axis defined by a stub shaft extending from one end of the rotatable rank A drive wheel d, which is rotatable around the The ratchet wheel engages the ratchet teeth and responds to the arcuate movement of the crank. The pawl e that indexes the tooth one by one, the stop body with the driving wheel f A temporary body that can be engaged with a stop body to stop the rotation of the wheel, and that is The pinion is disengaged from the stop body as the motor is driven, and the pinion is continuously driven. Therefore, the wheel can be rotated until the stop body and the temporary body engage again. a temporary object that is movable, and g. Engagement of the wheel with the drive pinion after the stop body and the temporary body have engaged The body is moved so that it disengages from the stop body, and the body is moved to disengage from the stop body. to provide a force to return the wheel to engagement with the drive pinion when Spring means adapted The drive mechanism according to claim 7 or 9, comprising: 11], a stop body is provided on the crank, and the crank engages with the fixed member to drive the Claim 1 which defines the permissible arcuate displacement of the crank member to which the wheel is attached. The drive mechanism according to item 0. 12], adjacent to the central fulcrum and the rear surface of the daisy wheel located on the carriage. in a direction substantially perpendicular to the plane of the daisy wheel. an arm directed towards an example fulcrum adapted for movement and such movement. an actuator with an end on the other side of the fulcrum accessible to create a motion; Claims 1 and 2, wherein the carriage is provided with a barbed lever that can be accessed. The printer according to any one of paragraphs 11 to 11. 1B), the lever should be placed horizontally with the arm spaced the maximum length from the rear of the daisy wheel. 13. The printer of claim 12, wherein the printer is spring biased in the folded position.