WO2004060684A1

WO2004060684A1 - Ink ribbon winding mechanism and printer device

Info

Publication number: WO2004060684A1
Application number: PCT/JP2003/017003
Authority: WO
Inventors: Hideyuki Umeno
Original assignee: Fujitsu Frontech Limited
Priority date: 2002-12-27
Filing date: 2003-12-26
Publication date: 2004-07-22
Also published as: JP2004209784A; CN1732091A; ES2326102A1; CN100503261C; ES2326102B2; KR20050088142A

Abstract

An ink ribbon winding mechanism comprises a planetary gear mechanism consisting of a sun gear rotating forwardly and backwardly according to the movement of a carrier, a holder rotatably installed in the sun gear and having a pressing section for pressing the sun gear, a first planetary gear installed in the holder and meshing with the sun gear, and a second planetary gear installed in the holder and meshing with the sun gear, a winding means (winding gear, intermediate gear) with which either the first planetary gear or the second planetary gear of the planetary gear mechanism meshes and which is driven in the ink ribbon winding direction, and a holder lock means for fixing the holder at a neutral position where the first and second planetary gears do not mesh with the winding means. Thus, during the non-printing movement of the carrier, the holder can be fixed at the neutral position where the first and second planetary gears do not mesh with the winding means, by the holder lock means, so that even if the ink ribbon cassette is of the ink replenishing type in which ink ribbon winding is not effected, over-replenishment of ink to the ink ribbon does not occur, ensuring that the print density is constant.

Description

Description: Ink ribbon winding mechanism and printer device

The present invention relates to an ink ribbon winding mechanism for winding an ink ribbon in accordance with movement of a carrier, and a printer device having the same. Background art

This will be described with reference to FIG. 1, which is a configuration diagram of a conventional ink ribbon winding mechanism. The carrier 26 on which the print head 12 and the cassette 11 are mounted is provided so as to reciprocate in parallel with the platen 23. The print head 1 2 is placed facing the platen 23, and the ink ribbon 13 is interposed between the print head 1 2 and the platen 23 to print while winding the ink ribbon 13 Printing is performed by pressing the head 1 2 to the platen 23 side.

The winding of the ink ribbon 13 by the cassette 11 is performed as follows. In FIG. 1, the inside of the cassette 11 when the carrier 26 is moved in the A direction and the opposite direction A ′ is shown. The rotation directions of the gears 14 to 19 incorporated in are shown by solid and dotted arrows, respectively.

When the carrier 26 is moved in the direction A, the gear 14 rotates while engaging with a rack 24 provided in parallel with the platen 23. The rotation of the gear 14 is transmitted to the sun gear 15.

An L-shaped lever 20 is rotatably attached to the rotation shaft of the sun gear 15. Further, this lever 20 is pressed against the sun gear 15 by _n lever 20, A planetary gear 16 and a planetary gear 17 that are coupled to the sun gear 15 are rotatably provided.

When the sun gear 15 rotates in the direction of the solid arrow, the repeller 20 pressing against the sun gear 15 moves in the same direction as the sun gear 15 until the planet gear 16 engages the gear 18 (arrow B direction)

Then, a take-up reel (not shown) fitted to the rotation shaft of the gear 18 rotates in the same direction as the gear 18, and winds the ink ribbon 13 in the direction of arrow C.

On the other hand, when the carrier 26 is moved in the direction A ', the sun gear 15 rotates in the direction of the dashed arrow, and the lever 20 pressing against the sun gear 15 is driven by the planetary gear 17 Rotate in the same direction as sun gear 15 (arrow B ') until it joins with 19. Then, a take-up reel (not shown) fitted on the rotating shaft of the gear 19 rotates in the same direction as the gear 19, and winds the ink ribbon 13 in the direction of arrow C '(for example, see Patent Reference 1).

In this way, the ink ribbon 13 is wound up in a direction corresponding to the moving direction of the carrier 26. Patent Document 1

Japanese Patent Application Laid-Open No. 5-50734 (Page 2, FIG. 1) Disclosure of the Invention

However, in the ink ribbon winding mechanism having the above configuration, even if the print head 12 does not perform printing, if the carrier 26 moves in the direction of the arrow A or the direction of the arrow A ', the ink ribbon 13 always moves. Is winding up.

Therefore, when the cassette 11 is an ink supply type cassette, the ink ribbon 13 is oversupplied with ink, and there is a problem that the printing becomes dark. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide an ink ribbon winding mechanism and a printer device having a constant print density. The first aspect of the present invention that solves the above-mentioned problems will be described with reference to, for example, FIG. 2 illustrating a first embodiment of the present invention. The planetary gear mechanism PG has a moving direction of the carrier 107. A sun gear 4 13 that rotates in the forward and reverse directions according to the direction of rotation, and a holder 4 2 1 that is provided rotatably on the rotation shaft of the sun gear 4 13 and has a pressing portion that presses against the sun gear 4 13. And a first planetary gear 451, which is rotatably provided on the holder 4 21 and is coupled to the sun gear 4 13; and a rotatably provided on the holder 4 21 and is coupled to the sun gear 4 13 And the second planetary gear 4 5 3. Among the winding means including the intermediate gear 4 6 3 and the winding gear 4 6 1 combined with the intermediate gear 4 6 3, the winding gear 4 6 1 includes the first planetary gear 4 5 1 and the intermediate gear 4 6. The third planetary gear 4 5 3 can be combined with 3. Then, when the first planetary gear 4 5 1 force is combined with the winding gear 4 6 1 or the second planetary gear 4 5 3 is combined with the intermediate gear 4 6 3, the winding gear 4 6 1 winds the ink ribbon. Rotate in the direction.

Then, the first planetary gear 4 5 1 and the second planetary gear 4 5 3 do not fit with the winding gear 4 6 1 and the intermediate gear 4 6 3 which are winding means-fix the holder 4 2 1 at the neutral position. Holder opening means HL is provided.

When the carrier without printing is moved, the first planetary gear 4 51 and the second planetary gear 4 53 3 are taken up by the holder locking means. The holder 4 2 1 can be fixed at a neutral position that does not match 6 3, and the ink ribbon is not wound. Therefore, even if the ink ribbon cassette is an ink supply type cassette, ink is not replenished to the ink ribbon, and the print density is constant.

According to a second aspect of the present invention, in the first aspect, the carrier further includes a fixed side carrier, the ink ribbon, the planetary gear mechanism, and the winding means. A movable carrier movable with respect to the fixed carrier and retractable from a recording medium, wherein the holder opening means is any one of the fixed carrier and the holder of the planetary gear mechanism. A convex portion provided on one side, and a concave portion provided on the other side and engaging with the convex portion when the movable carrier retreats from the recording medium and fixing the holder at the neutral position. It is a taking mechanism.

To prevent interference between the print head of the carrier and the recording medium to be passed when passing the paper, the carrier consists of a fixed-side carrier and a movable-side carrier with a print head. In such a case, a configuration in which the movable carrier is retracted from the recording medium is generally used.

The holder locking means of the present invention includes: a convex portion provided on one of the fixed side carrier and the holder of the planetary gear mechanism; and a convex portion provided on the other side, wherein the movable carrier retracts from a recording medium. The recess engages with the convex portion and fixes the holder at the above-mentioned neutral position, so that the holder opening means is operated using a moving mechanism of a movable carrier which is commonly used. And the configuration is simplified. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a configuration diagram of a conventional ink ribbon winding mechanism.

FIG. 2 is a front view of the vicinity of the carrier viewed from the direction of arrow D with the ink ribbon cassette and the ink ribbon cassette holder removed in FIG. 4, which is a perspective view of the printer device of the first embodiment.

FIG. 3 is a perspective view of the vicinity of the carrier viewed from the direction of arrow F in a state where the ink ribbon cassette and the ink ribbon cassette holder are removed in FIG. 4, which is a perspective view of the printer device of the first embodiment. FIG. 4 is a perspective view of the printer device according to the first embodiment.

FIG. 5 is a view in the direction of arrow D in FIG.

FIG. 6 is a view in the direction of arrow E in FIG.

7A and 7B are perspective views of the ink ribbon cassette. FIG. 7A is a view of the ink ribbon cassette in FIG. 4 as viewed in the direction of arrow D. FIG. 7B is a view of the ink ribbon cassette in FIG.

FIG. 8 is a front view of the ink ribbon cassette, the ink ribbon cassette holder, and the holder in FIG.

FIG. 9 is a perspective view of FIG.

FIG. 10 is a perspective view of FIG. 4 with the rack removed and viewed from the arrow F direction.

FIG. 11 is a perspective view illustrating the holder of FIG.

FIG. 12 is a diagram for explaining the second embodiment.

FIG. 13 is a diagram for explaining the third embodiment. BEST MODE FOR CARRYING OUT THE INVENTION

(Example of the first embodiment)

First, the overall configuration of a printer device provided with an ink ribbon winding mechanism according to the present embodiment will be described with reference to FIGS. 4 is a perspective view of the printer device, FIG. 5 is a view in the direction of arrow D in FIG. 4, and FIG. 6 is a view in the direction of arrow E in FIG. '

In the figure, the printer 100 is composed of a main body base 101, two guide shafts 103 provided horizontally along the main body base 101, and a guide shaft 105. It is roughly divided into a carrier 107 that is movably engaged.

On the carrier 107, a print head 108 for printing on the recording medium P and an ink ribbon cassette 109 containing an ink ribbon are set. 7 is a perspective view of the ink ribbon cassette 109, FIG. 7 (a) is a view of the ink ribbon cassette of FIG. 4 as viewed in the direction of arrow D, and FIG. 7 (b) is a view of the ink ribbon cassette as viewed in the direction of arrow G of FIG. (B) As shown in the figure, inside the ink ribbon cassette 109, endless ink ribbons are stored in a zigzag shape. The ink ribbon is guided by a pair of ink ribbon guides 109 a and 109 b formed in the ink ribbon force set 109, and the ink ribbon guides 109 a and Some of the ink ribbons 111 are exposed to the outside of the ink ribbon cassette 109 between the ink ribbon guide portions 109 b, and the ink ribbon 111 exposed to the outside faces the print head.

A feed roller (not shown) and a pressure roller elastically pressed by the feed roller via the ink ribbon 111 are provided in the ink ribbon cassette 109, and the ink ribbon 1 is rotated by rotating the feed roller. The winding of 1 1 is made.

As shown in FIG. 7 (b), a hole 109c facing the engaging hole formed at the rotation center of the feed roller inside the ink ribbon cassette 109 is provided on the back of the ink ribbon cassette 109. Is formed.

As shown in FIG. 7 (a), a knob 113 connected to the rotation center axis of the feed roller inside the ink ribbon cassette 109 is provided on the front of the ink ribbon cassette 109.

Next, the carrier 107 will be described with reference to FIGS. Fig. 8 shows the front view from the direction of arrow D, with the ink ribbon cassette, ink ribbon cassette holder and holder removed in Fig. 4, Fig. 9 shows the perspective view of Fig. 8, Fig. 10 shows the rack in Fig. 4, FIG. 11 is a perspective view seen from the direction of arrow F. FIG. 11 is a perspective view illustrating the plate of FIG. As shown in FIG. 10, the carrier 107 is composed of the fixed carrier 201 and the movable carrier 310 on which the print head 108 and the ink ribbon cassette 109 described above are provided. .

A horizontal through hole 203 is formed in the fixed-side carrier 201, and the guide shaft 105 passes through the through hole 203. A horizontal through hole 303 is also formed in the movable carrier 301, and the guide shaft 103 passes through the through hole 303. The cross-sectional shape of the through hole 303 is a horizontally long hole.

A vertical guide shaft 205 is provided on the fixed carrier 201, and a groove 300 having a substantially U-shaped cross section with which the guide shaft 205 engages is provided on the movable carrier 301. Is formed, and the movable carrier 301 is movable in the vertical direction with respect to the fixed carrier 201.

A belt 205 provided on the body base 101 side and extending in the horizontal direction is fixed to a belt fixing portion 207 formed on the fixed side carrier 201. The belt 205 is driven in the horizontal direction by driving means (not shown), and the carrier 107 composed of the fixed carrier 201 and the movable carrier 301 is guided by the guide shaft 105 and the guide shaft 103. To reciprocate horizontally. Then, the force 13 provided on the side of the printer 100 shown in FIGS. 4, 5 and 6 rotates, and the entire guide shaft 103 moves up and down via a transmission mechanism (not shown). The movable carrier 301 moves up and down with respect to the fixed carrier 201. The mechanism for moving the movable carrier 301 up and down is used when the print head 108 is retracted from the recording medium P at the time of paper feeding or the like, and is widely used in a printer.

Reference numeral 311 denotes an ink ribbon cassette holder for holding the ink ribbon cassette 109. An ink ribbon take-up mechanism 400 that winds the ink ribbon 111 of the ink ribbon cassette 109 is provided above the movable carrier 301.

As shown in FIGS. 4, 5, 8, and 9, the main body base 101 of the printer 100 is provided with a rack 401 in a horizontal direction.

As shown in FIG. 8, FIG. 9, and FIG. 10, the movable carrier 301 has a pinion 403 fitted to the rack 401, and a rotation in a direction different from the direction of the rotation axis of the pinion 403. A first gear 405 having a shaft is provided. Further, as shown in FIG. 10, between the pinion 403 and the first gear 405, a first bevel gear 407 fixed to the rotating shaft of the pin 403 is provided. A second bevel gear 409 fixed to the rotating shaft of the first gear 405 is provided so as to be engaged with the 1 bevel gear 407, and the rotation of the pinion 403 is transmitted to the first gear 405. It has become so.

Returning to FIG. 8, FIG. 9, and FIG. 10, the movable carrier 301 is fixed to the rotating shaft of the second gear 4 11 1 and the second gear 4 11 1 which are combined with the first gear 4 05. In addition, a sun gear 4 13 having fewer teeth than the second gear 4 11 is provided.

As shown in FIG. 9, a circular recess 4 17 centered on a shaft 4 15 that rotatably supports the sun gear 4 13 is formed on the end face of the sun gear 4 13.

Then, as shown in FIG. 11, the shaft 4 15 is fitted with a cylindrical portion 4 23 formed substantially at the center of the holder 4 21, and the holder 4 2 1 is connected to the shaft 4 15. It is provided rotatably at the center. Further, on the holder 4 21, a projection 4 2 5 and a projection 4 2 7 are formed on both sides of the cylindrical section 4 2 3 so as to press against the inner peripheral surface of the circular recess 4 17 of the sun gear 4 13. ing. The holder 4 2 1 rotates together with the sun gear 4 13 due to the friction generated between the protrusion 4 2 5, the protrusion 4 2 7 and the inner peripheral surface of the circular recess 4 17 of the sun gear 4 13. Has become.

The holder 4 21 has a shaft portion 4 29 and a shaft portion 4 3 1 formed on both sides of the cylindrical portion 4 2 3, and the shaft portion 4 2 9 has a first portion that engages with the sun gear 4 13. Planetary gear 4 5 1 force S, A second planetary gear 453 3 (see FIGS. 8 and 9 for the second planetary gear 453, not shown in FIG. 11) is formed on the shaft portion 431. The second planetary gear 4533 is combined with the sun gear 413. Each is provided rotatable. Here, the planetary gear mechanism PG is formed by the sun gear 4 13, the holder 4 21, the first planetary gear 4 51, and the second planetary gear 4 53. On the other hand, as shown in FIGS. 8 and 9, the movable carrier 301 has a winding gear 461, which serves as a winding means, and an intermediate gear 46, which is combined with the winding gear 461, as shown in FIG. And are provided.

When the holder 4 21 of the planetary gear mechanism rotates in one direction about the shaft 4 15, the first planetary gear 4 51 is combined with the winding gear 4 61, and the holder 4 2 1 The shape of the holder 421 is set so that the second planetary gear 453 is engaged with the intermediate gear 463 by rotating the other direction.

A winding shaft 465 that rotates together with the winding gear 461 is provided on the rotation center shaft of the winding gear 461. When the ink ribbon cassette 109 is set in the carrier 107, the take-up shaft 465 is connected to the inside of the ink ribbon cassette 109 via the hole 109c on the back of the ink ribbon cassette 109. Is fitted with an engagement hole formed at the center of rotation of the feed roller.

Next, the holder locking means HL will be described with reference to FIGS. Fig. 2 is a front view of the vicinity of the carrier as viewed in the direction of arrow D with the ink ribbon cassette and the ink ribbon cassette holder removed in Fig. 4, and Fig. 3 shows the state with the ink ribbon cassette and the ink ribbon cassette holder removed in Fig. 4. FIG. 4 is a perspective view of the vicinity of the carrier as viewed from the direction of arrow F.

As shown in FIG. 3, a thin plate is bent and formed on the distal end side of the plate 61 having the base end side attached to the fixed side carrier 201 side, and extends to the holder 41 side, and the distal end side is sharpened. A V-shaped convex portion 603 is provided. On the other hand, when the movable carrier 301 moves upward to retreat from the recording medium P in the holder 421, the movable carrier 301 engages with the convex portion 603, and the holder 421 is moved to the neutral position (the first planet). The gear 451 is fixed to the winding gear 461 of the winding means, and the second planetary gear 453 is fixed to the intermediate gear 463 of the winding means. Are formed.

Note that, in the present embodiment, the shape of the opening side of the concave portion 65 is such that the holder 4 2 1 is moved from the position where the first planet gear 4 5 1 is engaged with the winding gear 4 6 1 to the second planet gear 4 5. Regardless of the position up to the position where 3 engages with the intermediate gear 4 6 3, when the movable carrier 3 0 1 rises, the convex 6 0 3 can be engaged with the recess 6 0 5. Is set to

Next, the operation of the above configuration will be described.

When printing is performed on the recording medium P, the carrier 107 moves along the guide shafts 103 and 105 to perform printing on the recording medium P. With the movement of the carrier 107, the pinion 403 connected to the rack 401 rotates. The rotation of the pinion 400 is transmitted to the sun gear 413 via the first bevel gear 407, the second bevel gear 409, the first gear 405, and the second gear 411. It is.

When the moving direction of the carrier 107 is in the direction of the arrow I (the direction of the thick arrow) in FIG. 8, the sun gear 4 13 rotates counterclockwise. When the carrier 107 is in the direction of the arrow II in FIG. 8 (the direction of the thin arrow), the sun gear 413 rotates clockwise. When the sun gear 4 13 rotates, the first planet gear 4 5 1 and the second planet gear 4 5 3 of the planetary gear mechanism also rotate. Further, the holder 4 21 also rotates together with the sun gear 4 13.

Here, when the sun gear 4 1 3 rotates in the direction of the bold arrow, the holder 4 2 1 also rotates in the direction of the bold arrow, and as shown in FIG. In conjunction with 63, the intermediate gear 463 and the winding gear 461 rotate in the direction of the thin arrow. The rotation of the holder 4 21 stops when the second planetary gear 4 5 3 engages with the intermediate gear 4 6 3, and the projection 4 2 5 and the projection 4 2 7 of the holder 4 2 13 The circular recess 4 17 comes into sliding contact with the circumferential surface of 4 7.

Conversely, when the sun gear 4 13 rotates in the direction of the thin arrow, the holder 4 2 1 also rotates in the direction of the thin arrow, and the first planetary gear 4 5 1 joins with the winding gear 4 6 1, The take gear 4 6 1 rotates in the direction of the thick arrow. Incidentally, the rotation of the holder 4 21 stops when the first planetary gear 4 51 is engaged with the winding gear 4 6 1, and the protrusion 4 2 5 and the protrusion 4 2 7 of the holder 4 2 The inner peripheral surface of the circular concave portion 4 17 of the sun gear 4 13 comes into sliding contact.

Then, regardless of whether the carrier 107 moves in the direction of the arrow I (the direction of the thick arrow) or in the direction of the arrow I I (the direction of the thin line arrow), the rotation direction of the winding gear 461 becomes the same direction.

As the winding gear 4661 rotates, the winding shaft 465 also rotates in the same direction, and the feed roller inside the ink ribbon cassette 109 is driven to rotate, whereby the ink ribbon 111 is wound. You.

Next, when the carrier 107 moves along the guide shaft 103 and the guide shaft 105 without printing on the recording medium P, before the carrier 107 moves, The movable carrier 301 of the carrier 107 rises and retreats from the recording medium P. Then, as shown in FIGS. 2 and 3, the concave portion 605 of the holder 421 is engaged with the convex portion 603 of the fixed-side carrier 201, and the holder 421 is in the neutral position (first position). The planetary gear 4 5 1 is fixed to the winding gear 4 6 1 of the winding means, and the second planetary gear 4 5 3 is fixed to the intermediate gear 4 6 3 of the winding means) and the holder 4 2 1 rotates. Is forbidden. Therefore, even if the carrier 107 moves, the winding gear 461 does not rotate, and the ink ribbon 111 is not wound.

According to the above configuration, the following effects can be obtained.

(1) When the carrier 107 moves along the guide shaft 103 and the guide shaft 105 without printing on the recording medium P, the ink ribbon 111 is wound. Absent. Therefore, even if the incremental cassette 109 is a cassette of an ink supply type, the ink is not excessively supplied to the ink ribbon 111 and the print density is constant.

When the carrier 107 moves along the guide shaft 103 and the guide shaft 105 without printing on the recording medium P, the winding of the ink ribbon 111 should not be performed. As a result, energy saving of the apparatus can be achieved, and the durability of the mechanism for winding the ink ribbon is also improved.

(2) The convex portion 603 provided on the fixed-side carrier 201 and the concave portion 605 provided on the holder 421 of the movable-side carrier 301 are both V-shaped, and the concave portion 605 of the concave portion 605 is provided. The shape of the opening side is between the position where the holder 4 21 is engaged with the first gear 4 51 and the winding gear 4 6 1 and the position where the second planet gear 4 5 3 is engaged with the intermediate gear 4 6 3. In any position, the movable carrier 301 is raised so that when the movable carrier 301 rises, the convex portion 603 is shaped to engage with the concave portion 605, so that the movable carrier 301 Is raised, the convex portion 603 and the concave portion 605 are always engaged, and the rotation of the holder 421 can be prohibited.

(3) Since the convex portion 603 is formed by bending a thin plate material, the convex portion 603 has elasticity. Therefore, the movable carrier 301 rises, and it is possible to absorb the impact when the concave portion 605 of the holder 421 is engaged with the convex portion 603 of the fixed carrier 201. Note that the present invention is not limited to the above embodiment. In the above-described embodiment, the convex portion 603 is provided on the fixed-side carrier 201 side, and the concave portion 605 is provided in the holder 421 of the movable-side carrier 301. A concave portion may be provided on the 01 side, and a convex portion may be formed on the holder 4 21 of the movable carrier 301.

Also, in the present embodiment, a mechanism for raising the movable carrier 301 at the time of paper feeding or the like is used, and the convex portion 603 on the fixed carrier 201 is attached to the movable carrier 301. The concave portion 605 of the holder 421 is engaged. For example, a convex portion is provided on the movable carrier 301 side, and the convex portion is engaged with and disengaged from the concave portion 605 of the holder 421. The movable carrier 301 may be separately provided with a holder locking means for causing it to be locked.

(Second embodiment)

This will be described with reference to FIGS. The difference between the present embodiment and the first embodiment is the configuration of the holder locking means, and the other parts are the same. Therefore, FIG. 2 of the first embodiment differs from FIG. The same portions are denoted by the same reference numerals, and overlapping description will be omitted. The figure shows a state where the movable carrier 301 is not retracted from the recording medium. The base end of a leaf spring 501 is attached to the movable carrier 301 as an arm. A roller 505 capable of pressing against a stopper surface 503 formed on the fixed-side carrier 201 is provided at a distal end portion of the leaf spring 501. Further, a V-shaped convex portion 509 extending toward the holder 421 and having a sharp distal end is provided at an intermediate portion of the leaf spring 501.

On the other hand, when the movable carrier 301 moves upward in order to retreat from the recording medium P, the holder 421 is engaged with the convex portion 509, and the opening for fixing the holder 421 in the neutral position is provided. A V-shaped recess 605 having a wide side is formed.

In this embodiment, also, the shape of the opening side of the concave portion 655 is such that the holder 4 21 is moved from the position where the first planetary gear 4 5 1 is engaged with the winding gear 4 6 1 to the second planetary gear 4 Regardless of the position between 5 3 and the position where the intermediate gear 4 6 3 is engaged, When the movable carrier 301 rises, the convex portion 509 is set in a shape capable of engaging with the concave portion 605.

The operation of such a configuration will be described. The movable carrier 301 rises from the state shown in the figure and retracts from the recording medium P. Then, the roller 505 is pressed against the stopper surface 503 of the fixed-side carrier 201, the leaf spring 501 bulges, and the convex portion 509 becomes the concave portion 605 of the holder 421. Engagement with the convex portion 63 of the spring fixes the holder 421 in the -Electrical position, and the rotation of the holder 421 is prohibited.

According to the above configuration, the following effects can be obtained.

(1) When the carrier 107 moves along the guide shaft 103 and the guide shaft 105 without printing on the recording medium P, the ink ribbon 111 is wound. Absent. Therefore, even if the incremental cassette 109 is a cassette of an ink supply type, excessive supply of the ink to the incremental 111 does not occur, and the print density is constant.

(2) Both the convex portion 509 provided on the leaf spring 501 and the concave portion 605 provided on the holder 421 are V-shaped, and the shape of the concave portion 605 on the opening side is the holder 425. 1 is any position between the position where the first planetary gear 4 5 1 is engaged with the winding gear 4 6 1 and the position where the second planetary gear 4 5 3 is engaged with the intermediate gear 4 6 3. When the movable carrier 301 rises, the convex portion 509 is set in such a shape that it can be engaged with the concave portion 605, so that the movable carrier 301 can be raised. However, the projection 509 and the recess 605 are always engaged, and the rotation of the holder 421 can be prohibited. (3) Since the convex portion 509 is provided on the leaf spring 501, the movable carrier 301 rises, and the concave portion 605 of the holder 421 becomes the convex portion 505 of the leaf spring 501. It is possible to absorb the impact when engaging with 09.

Note that the present invention is not limited to the above embodiment. Even in the above embodiment, a concave portion may be provided on the leaf spring 501 side, and a convex portion may be provided on the holder 421 side.

(Third Embodiment)

This will be described with reference to FIGS. The difference between the present embodiment and the second embodiment is also the configuration of the holder locking means, and the other parts are the same. The same parts as those described above are denoted by the same reference numerals, and redundant description will be omitted.

The figure shows a state where the movable carrier 301 is not retracted from the recording medium.

A base 701 extending in the radial direction of the rotation axis of the holder 421 is opposed to a stop surface 503, and an arm 703 to which a distal end of the base 701 is connected substantially at the center thereof. A lock arm 705 made of a substantially T-shaped and elastic material is formed on the edge of the holder 421.

The lock arm 705 has a surface 703 a of the arm portion 703 facing the stop surface 503 substantially parallel to the stop surface 503 when the holder 421 is in the -Eutrane position. It is attached to the holder 4 2 1 so that

Further, at both ends of the surface 703 a of the arm portion 703, a projection 711 and a projection 713 that can abut against the stopper surface 503 are formed.

The operation of such a configuration will be described. The movable carrier 301 rises from the state shown in the figure and retracts from the recording medium P. Then, the projection 711 of the arm portion 703 of the lock arm 705 and the projection 711 of the locking arm 705 become the stopper surface 503 of the fixed-side carrier 201. To fix the holder 421 in the neutral position, and the rotation of the holder 421 is prohibited.

According to the above configuration, the following effects can be obtained.

(1) When the carrier 107 moves along the guide shaft 103 and the guide shaft 105 without printing on the recording medium P, winding of the incremental 111 is not performed. . Therefore, even if the incremental cassette 109 is a cassette of an ink supply type, excessive supply of the ink to the incremental 111 does not occur, and the print density is constant.

When the carrier 107 moves along the guide shaft 103 and the guide shaft 105 without printing on the recording medium P, the winding of the ink ribbon 111 should not be performed. As a result, energy saving of the apparatus can be achieved, and the durability of the mechanism for winding the ink ribbon can be improved.

(2) The lock arm 705 is formed of an elastic material, and both ends of the surface 703 a of the arm portion 703 are provided with a projection 711 and a projection 713 which can abut against the stopper surface 503. As a result, the movable carrier 301 rises, and the protrusion 7 of the lock arm 705 is formed.

When the projections 713 contact the stopper surface 503, the arm 703 is elastically deformed and can absorb the type f impact.

Note that the present invention is not limited to the above embodiment. In the above embodiment, the projections 711 and 713 are provided on the lock arm 705 side, but may be provided on the stop surface 503 side of the fixed-side carrier 2. Also, protrusion 7 1 1 and protrusion 7 1

Of the three, one protrusion may be provided on the lock arm 705 side, and the other protrusion may be provided on the stopper surface 503 side of the fixed carrier 201.

As described above, according to the present invention, when the carrier that does not perform printing is moved, the holder locking means is used to hold the holder at the neutral position where the first planetary gear and the second planetary gear do not engage with the winding means. Can be fixed with a roll of ink ribbon No picking is done. Therefore, even if the ink cartridge is an ink supply type cassette, excessive supply of ink to the ink ribbon does not occur, and the print density is constant.

Further, according to the invention, the holder locking means is provided on one of the fixed side carrier and the holder of the planetary gear mechanism, and is provided on the other, and the movable side carrier is When retracted from the recording medium, the concave portion engages with the convex portion and fixes the holder at the neutral position, so that the holder can be locked by using a moving mechanism of a movable carrier that is generally used. The means can be activated and the configuration is simplified.

Claims

The scope of the claims

1. In the ink ribbon winding mechanism that winds the ink ribbon according to the movement of the carrier,

A sun gear that rotates in the forward and reverse directions according to the moving direction of the carrier, a holder that is rotatably provided on a rotation shaft of the sun gear, and that has a pressing portion that presses against the sun gear, and that is rotatable with the holder. A planetary gear mechanism, comprising: a first planetary gear provided to be coupled to the sun gear; and a second planetary gear provided rotatably to the holder and coupled to the sun gear;

A winding means for driving in a direction in which the planetary gear of the first planetary gear or the second planetary gear of the planetary gear mechanism is wound and winds the ink ribbon; and the first planetary gear, Holder opening means for fixing the holder at a neutral position where the second planetary gear does not engage with the winding means;

An ink ribbon winding mechanism, comprising:

2. The carrier is composed of a fixed carrier, a movable carrier provided with the ink ribbon, the planetary gear mechanism, and the winding means, movably provided on the fixed carrier, and retractable from a recording medium. Become

The holder opening means,

A projection provided on one of the fixed carrier and the holder of the planetary gear mechanism;

A concave portion provided on the other side and engaging with the convex portion when the movable carrier is retracted from the recording medium, and fixing the holder at the neutral position;

2. The ink ribbon winding mechanism according to claim 1, wherein:

3. The carrier comprises a fixed carrier, a movable carrier provided with the ink ribbon, the planetary gear mechanism, and the winding means, movably provided on the fixed carrier, and retractable from a recording medium. Become

The holder lock means,

A stopper surface provided on the fixed side carrier,

When the movable carrier is not retracted, the movable carrier is separated from the holder of the planetary gear mechanism. When the movable carrier is retracted from the recording medium, the movable carrier is pushed by the stopper surface, and An arm that moves toward the holder of the mechanism,

Biasing means for biasing the arm toward the stopper surface;

A projection provided on one of the arm and the holder of the planetary gear mechanism;

A concave portion provided on the other side and engaging with the convex portion when the movable carrier retreats from the recording medium, and fixing the holder at the neutral position;

2. The ink ribbon winding mechanism according to claim 1, wherein:

4. The convex portion is a V-shaped convex portion having a sharp concave side.

4. The ink ribbon winding mechanism according to claim 2, wherein the recess is a V-shaped recess having a wide opening.

5. The carrier includes a fixed carrier, a movable carrier provided with the ink lipon, the planetary gear mechanism, and the winding means, movably provided on the fixed carrier, and retractable from a recording medium. ,

The holder lock means,

A stopper surface provided on the fixed side carrier,

A plane formed on the holder side and substantially parallel to the stopper surface when the holder is at the neutral position; 2. The ink ribbon winding mechanism according to claim 1, wherein:

6. The center of the plane is supported by the holder, and both ends are formed as free elastic arms,

6. The ink ribbon winding mechanism according to claim 5, wherein a projection is formed at one of an end of the elastic arm and a portion of the stove face facing the end of the elastic arm, the projection being in contact with the other. .

7. In a printer having an ink ribbon winding mechanism for winding an ink ribbon in accordance with movement of a carrier,

A sun gear that rotates in the forward and reverse directions according to the moving direction of the carrier, a holder that is rotatably provided on a rotation shaft of the sun gear, and that has a pressing portion that presses against the sun gear, and that is rotatable with the holder. A first planetary gear provided to be coupled to the sun gear; a planetary gear mechanism comprising a second planetary gear rotatably provided to the holder and coupled to the sun gear;

A winding unit that is engaged with any one of the first planetary gear and the second planetary gear of the planetary gear mechanism and drives the ink ribbon in a winding direction; and the first planetary gear; (2) holder opening means for fixing the holder at a neutral position where the planetary gear does not engage with the winding means;

A printer device comprising: