JP3603608B2 - Braking device for ribbon cartridge and ribbon cartridge provided with the same - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a braking device for a ribbon cartridge for applying a back tension to an ink ribbon, and a ribbon cartridge provided with the braking device.
[0002]
[Prior art]
Conventionally, as this kind of ribbon cartridge, the one described in Utility Model Registration No. 25664763 is known. This ribbon cartridge contains a transparent tape on which printing is performed and a double-sided adhesive tape adhered to the printing surface of the transparent tape, and an ink ribbon for printing is supplied to the feeding core and the winding core. It is housed in a wound state. The driven-side feeding core is rotatably supported by a core shaft projecting from the inner surface of the cartridge case, and is rotated by a torsion spring mounted in a hollow portion of the core shaft so as to apply back tension to the ink ribbon. It is designed to be braked. In this case, a through hole is formed in a part of the core shaft, and a ring portion of the torsion spring projects from the through hole to urge the feed core in the axial direction. As a result, when the pay-out core rotates, the ring portion pressed against the core strongly contacts the inner surface of the pay-out core, and the rotation of the pay-out core is braked.
[0003]
[Problems to be solved by the invention]
In such a conventional ribbon cartridge, since the ring portion of the torsion spring is in direct contact with the inner surface of the feeding core by point contact, the braking force is large due to the roundness of the inner peripheral surface of the feeding core or fine irregularities. There have been problems such as fluctuations and cracking of the torsion spring. As a result, the fluctuation of the back tension applied to the ink ribbon increases, and the print quality deteriorates.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a braking device in a ribbon cartridge which can stabilize a back tension applied to an ink ribbon with a simple structure, and a ribbon cartridge including the braking device.
[0005]
[Means for Solving the Problems]
The ribbon cartridge braking device of the present invention includes, in a cartridge case, a delivery spool for delivering the ink ribbon, a hollow shaft-shaped projection that rotatably holds the delivery spool, and a braking mechanism that brakes the rotation of the delivery spool. In the braking device in the ribbon cartridge, the braking mechanism includes a sliding contact piece portion having a spring property formed by removing a part of the shaft-like protrusion in a U-shape in the axial direction, and a hollow portion of the shaft-like protrusion. And a spring for urging the leading end of the sliding contact piece toward the inner peripheral surface of the payout spool, wherein the leading end of the sliding contact piece has a sliding shape complementary to the inner peripheral surface of the payout spool. With an interface, The spring is formed of a wire rod and includes a spring body bent in a substantially “U” shape, and a cross-sectional shape orthogonal to the axial direction of the hollow portion of the axial projection is inserted from one end of the axial projection. It is formed in a rectangular shape according to the insertion posture of the spring in plan view.It is characterized by having.
[0006]
According to this configuration, the delivery spool whose rotation is braked is urged by the spring through the sliding contact piece formed on a part of the shaft-shaped projection, and the leading end of the sliding contact piece (sliding contact piece). The contact end is formed on a sliding contact surface having a shape complementary to the inner peripheral surface of the delivery spool, so that the spring force applied for braking has a relatively large area and is uniform on the inner peripheral surface of the delivery spool. Act on. For this reason, even if there are delicate irregularities on the inner peripheral surface of the delivery spool, the spring force is not concentrated on a part, and the spring force can be uniformly and stably applied thereto.
The spring is made of a wire and has a spring body bent in a substantially “U” shape. Therefore, a spring exhibiting a stable spring force can be easily produced at low cost. In this case, it is preferable to include a ring portion that is a biasing end obtained by bending one end of the spring body into a circular shape.
Furthermore, since the cross-sectional shape of the hollow portion of the axial projection is formed in a rectangular shape in accordance with the insertion posture of the spring, the spring can be inserted into the hollow portion without mistake in the insertion direction, and the inserted portion can be inserted. In the state, the posture of the spring can be stabilized.
[0007]
In this case, it is preferable that the sliding contact piece portion extends from the inner surface of one of the front and back surfaces of the cartridge to a substantially intermediate portion in the axial direction of the feeding spool.
[0008]
According to this configuration, a spring force can be applied to a substantially intermediate portion in the axial direction of the pay-out spool, so that rotational fluctuation of the pay-out spool can be minimized.
[0009]
In these cases, it is preferable that the shaft-like projection is formed integrally with the cartridge case.
[0010]
According to this configuration, the axial protrusion and the sliding contact piece can be easily formed.
[0011]
In these cases, it is preferable that the hollow portion of the shaft-shaped projection is formed with a locking projection for locking the spring inserted therein in a retaining state.
[0012]
According to this configuration, it is possible to prevent the spring inserted into the hollow portion from easily falling off due to an impact applied to the cartridge case or the like. Further, when the spring is inserted, the spring is set over the locking projection, so that the set state can be confirmed, and the mounting failure of the spring can be prevented.
[0017]
The ribbon cartridge of the present inventionthe aboveAnd a braking device for the ribbon cartridge according to any one of the above.
[0018]
According to this configuration, since a stable back tension can be applied to the ribbon cartridge, printing defects caused by the ink ribbon can be minimized.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a tape printing apparatus to which a braking device in a ribbon cartridge according to one embodiment of the present invention and a ribbon cartridge (tape cartridge) including the same will be described with reference to the accompanying drawings. This tape printing apparatus prints (prints) desired characters and figures on a printing tape mounted in the apparatus via a tape cartridge, and cuts a printed portion of the printing tape into a predetermined length. is there. More specifically, an adhesive label dedicated to MD (mini-disc) is built in the printing tape, and the tape printing apparatus performs desired printing on the surface of the adhesive label. Then, the adhesive label after printing is peeled off from the printing tape and is attached to a predetermined position on an MD (cassette).
[0020]
FIG. 1 is an external perspective view of the tape printer in an opened state. As shown in FIG. 1, the tape printer 1 includes a printer main body 2 and a tape cartridge 3 detachably mounted on the printer main body 2. The printing apparatus main body 2 has an outer shell formed by an upper and lower split device case 4. A keyboard 5 including various input keys 5a is provided on a front upper surface of the device case 4, and a display 6, an opening / closing cover 7 and a cover opening button 8 for opening the same are provided on a rear upper surface. A cartridge mounting portion 9 for mounting the tape cartridge 3 is formed in the inside of the opening and closing cover 7, and the tape cartridge 3 is attached to and detached from the cartridge mounting portion 9 with the opening and closing cover 7 opened. . Further, a tape discharge port 10 for communicating the cartridge mounting section 9 with the outside of the apparatus is formed on the left side of the apparatus case 4, and a tape cutter (not shown) for cutting the sent print tape 100 is formed in the tape discharge port 10. ) Is facing. Further, a cutter button 11 for performing a cutting operation of the tape cutter is provided at a left rear portion of the apparatus case 4.
[0021]
On the other hand, a print head 14 covered with a head cover 13, a platen 15 facing the print head 14, a take-up reel drive shaft 16, and a guide projection 17 for guiding the mounting of the tape cartridge 3 are provided on the cartridge mounting section 9. It is erected. Further, a tape feed mechanism (not shown) for rotating the platen 15 and the take-up reel drive shaft 16 is incorporated below the cartridge mounting section 9. Reference numeral 18 in the drawing denotes a head operation plate, and when the cover 7 is closed, the print head 14 is rotated by the head operation plate 18 to a printing position where the platen 15 is pressed, thereby enabling printing. .
[0022]
After the user mounts the tape cartridge 3 in the cartridge mounting section 9, the user inputs print information such as desired characters using the keyboard 5, and at the same time, confirms the input result on the display 6 and performs editing. Next, when printing is instructed via the keyboard 5, the tape feeding mechanism is driven to feed out the printing tape 100 from the tape cartridge 3 and, at the same time, the printing head 14 is driven and the portion of the adhesive label 110 of the printing tape 100 is moved. The desired printing is performed. Alternatively, a mini-disc player (not shown) is connected to the printing apparatus main body 2 to read out and edit the index data or the like stored in the MD, and print it on the adhesive label 110 portion of the printing tape 100.
[0023]
Then, the printed portion of the printing tape 100 is continuously sent out from the tape outlet 10 in parallel with the printing operation. Thus, when the desired printing is completed, the tape feeding mechanism stops the feeding operation. Here, when the user presses the cutter button 11 disposed on the left rear portion of the apparatus case 4, the tape cutter is activated, and the printing tape 100 with the adhesive label is cut to a desired length.
[0024]
As shown in FIGS. 2 and 3, the tape cartridge 3 has an outer shell formed by a cartridge case 31 including an upper case 31a and a lower case 31b. The upper case 31a and the lower case 31b are engaged with each other in a snap-in manner (see FIGS. 4 and 5), and are separated by the adhesive seal 32 indicating the type of the tape cartridge 3 in the engaged state. It is impossible to join (see FIG. 2). The adhesive seal 32 is configured to be peelable, and the used printing tape 100 and the like can be replaced by removing the adhesive seal 32 and removing the upper case 31a.
[0025]
Inside the cartridge case 31, the printing tape 100 wound in a roll shape around the tape core 120, and the ink ribbon 200 wound around the feeding core 210 at one end and wound around the winding core 220 at the other end are housed. ing. The printing tape 100 is fed out from the tape core 120, while the ink ribbon 200 is fed out from the feeding core 210, overlaps with the printing tape 100, and runs along with the winding core 220.
[0026]
Further, in a portion where the printing tape 100 and the ink ribbon 200 overlap, an opening 34 facing the printing head 14 and the platen 15 is formed (see FIG. 10). When the tape cartridge 3 is mounted on the cartridge mounting section 9, the print head 14 and the platen 15 are inserted into the opening 34 so as to sandwich the print tape 100 and the ink ribbon 200. At the same time, the take-up reel drive shaft 16 is inserted into the hollow portion of the take-up core 220. Then, when the platen 15 and the take-up reel drive shaft 16 rotate synchronously, the printing tape 100 and the ink ribbon 200 are simultaneously sent, and the print head 14 is driven, so that printing is performed. The print completed portion of the printing tape 100 is sent out from the tape outlet 35 formed in the cartridge case 31 toward the tape outlet 10 of the device case 4.
[0027]
The printing tape 100 is formed by attaching a release tape (base tape) 102 to a printing tape main body 101 with an adhesive, and a large number of adhesive labels 110 are formed on the printing tape main body 101 by making cut lines in a square. It is built side by side. That is, the adhesive label 110 is formed by half-cutting a tape with a so-called release paper. The portions other than the portion where the adhesive label 110 is formed, that is, the left and right vertical non-label portions 111 are portions where the printing tape 100 is cut, and the upper and lower horizontal non-label portions (label non-sticking portions) 112 are This is a portion where the running (extending) of the printing tape 100 is guided.
[0028]
Further, a pair of front and back films 130, 130 are adhered to both end surfaces of the printing tape 100 wound in a roll shape. The film 130 is adhered to both end surfaces of the printing tape 100 with an adhesive force that does not affect the feeding of the printing tape 100, and prevents the printing tape 100 from scattering. The adhesive label 110 according to the embodiment is for attaching (size) to the front and back surfaces of an MD cassette or cassette case, but is attached to the side of the MD cassette separately from the printing tape 100. For this purpose, a printing tape with an elongated adhesive label is also provided in a tape cartridge.
[0029]
As shown in FIGS. 3, 4 and 5, substantially half of the inside of the cartridge case 31 has a tape accommodating portion 41 formed in a circular shape excluding a portion serving as a feeding port of the printing tape 100, and a tape accommodating portion. A tape feeding section 42 connected to 41 is provided. The tape accommodating portion 41 includes an upper tape accommodating wall 44a protruding from the inner surface of the upper case 31a and a lower tape accommodating wall b protruding from the inner surface of the lower case 31b. The upper tape feeding wall 45a is connected to the upper tape receiving wall 44a, and the lower tape feeding wall 45b is connected to the lower tape receiving wall 44b. The upper and lower tape supply walls 45a and 45b form a supply port of the printing tape 100 between the upper and lower tape storage walls 44a and 44b, and are curved in a spiral shape toward the tape supply port 35. It extends to the vicinity of the opening 34.
[0030]
The upper tape housing wall 44a has a substantially circular peripheral wall (sub guide wall) 46 and a plurality of protrusions 47 formed at equal intervals on the inner surface of the peripheral wall 46. Are slidably in contact with the upper horizontal non-label portion 112 of the contained printing tape 100. Similarly, the lower tape housing wall 44b has a substantially circular peripheral wall portion 46, and a plurality of protrusions 47 formed at equal intervals on the inner surface of the peripheral wall portion 46, and the opening wall constituting the opening portion 34 described above. There is provided a rising wall 48 formed by raising a portion of the peripheral wall portion 46 that is opposed to the rear wall 36, and a projecting wall 49 projecting outside the rising wall 48. Also in this case, the protruding portion 47 comes into sliding contact with the lower horizontal non-label portion 112 on the lower side of the contained printing tape 100.
[0031]
The upper tape feed-out wall 45a has a curved portion 51 connected to the peripheral wall portion 46 of the upper tape housing wall 44a, and a guide wall portion (main guide wall portion) 52 formed inside the curved portion 51. Has a front end extending beyond the curved portion 51. The guide wall portion 52 is provided on an extension of the plurality of protrusions 47, and is in sliding contact with the upper horizontal non-label portion 112 of the print tape 100 like the protrusions 47. The lower tape accommodating wall 45b is continuous with the peripheral wall 46 of the lower tape accommodating wall 44b and is formed at the same height as the rising wall 48, and a guide wall formed inside the partition 53. And a part 52. Also in this case, the tip of the guide wall portion 52 extends forward of the partition wall portion 53, and comes into sliding contact with the lower horizontal non-label portion 112 of the printing tape 100.
[0032]
The partition 53 separates the print tape 100 side and the ink ribbon 200 side, and partitions the ink ribbon 200 so that the ink ribbon 200 does not come into contact with the print tape 100 when the ink ribbon 200 sags. ing. This prevents jamming due to the ink ribbon 200 sticking to the adhesive material protruding from the edge of the adhesive label 110.
[0033]
On the other hand, a cylindrical projection 55 and a cross-shaped rib 56 are formed on the upper case 31a located at the inner central portion of the upper tape housing wall 44a. Similarly, a cylindrical projection 56 and a cross-shaped rib 56 are formed on the lower case 31b located at the inner central portion of the lower tape housing wall 44b. The upper and lower cylindrical projections 55 are parts on the outer peripheral surface of which the tape core 120 of the printing tape 100 is rotatably supported, and the inner peripheral surface thereof mounts the tape cartridge 3 on the cartridge mounting portion 9. Occasionally, it is a portion that fits into the guide projection 17.
[0034]
When the printing tape 100 is set in the tape housing portion 41 configured as described above, as shown in FIGS. 3 and 6, a plurality of protrusions of the upper tape housing wall 44 a are provided on the upper horizontal non-label portion 112 of the printing tape 100. The convex portion 47 and the guide wall portion 52 of the upper tape feeding wall 45a face each other, and the lower horizontal non-label portion 112 has a plurality of projecting portions 47 of the lower tape receiving wall 44b and the guide wall portions of the lower tape feeding wall 45b. 52 confronts. For this reason, when the printing tape 100 is fed out, the printing tape 100 is sent out while the two non-label portions 112, 112 are guided by the two guide walls 52, 52 and slidably contact with the guide walls. Further, when the printing tape 100 is separated, the plurality of projecting portions 47 also function as guide members, and the printing tape 100 is sent out while slidingly contacting the two non-label portions 112, 112.
[0035]
Therefore, the adhesive label 110 of the printing tape 100 that is fed out does not come into contact with these guide members at all, and even if the adhesive material is easily peeled off, for example, it sticks out before printing. The label 110 does not come off. The tip of each of the protrusions 47 is inclined so that the guide of the printing tape 100 into the tape housing portion 41 can be guided.
[0036]
On the other hand, the lower tape accommodating wall 44b is constituted by a rising wall (peripheral wall portion) 48 and a protruding wall 49 of the lower tape housing wall 44b, and both guide wall portions (partition portions 53) 52, 52 of both upper and lower tape feeding walls 45a, 45b. A stop roller 61 for preventing reverse movement of the printing tape 100 is accommodated in the wedge-shaped space 60 in a loosely fitted state. That is, the rising wall (peripheral wall portion) 48 and the projecting wall 49 and the two guide wall portions (partition portions 53) 52, 52 form a wedge-like shape in which the rising wall 48 and the two guide wall portions 52, 52 form an acute angle. A wall portion is formed, and the wedge-shaped wall portion and the stop roller 61 form a reverse running prevention mechanism of the printing tape 100.
[0037]
The stop roller 61 is formed of a columnar rubber or the like, and is formed to have substantially the same size as the size between the upper case 31a and the lower case 31b, as shown in FIG. The stop roller 61 has flexibility and is slightly bent in a free state. For this reason, the stop roller 61 housed in the wedge-shaped space 60 is in constant contact with the printing tape 100 at any part in the longitudinal direction. Therefore, when the printing tape 100 travels in the forward and reverse directions, it moves in the wedge-shaped space 60 due to the sliding resistance.
[0038]
That is, as the print tape 100 is fed, the stop roller 61 moves toward the protruding wall 49 while rolling in contact with the print tape 100, and allows the print tape 100 to travel. On the other hand, when the printing tape 100 runs backward in the direction opposite to the feeding direction, the stop roller 61 contacts the printing tape 100 and rolls while contacting the printing tape 100 at the narrowed portion between the rising wall 48 and the two guide wall portions 52, 52. Move towards. Due to this movement, the stop roller 61 is sandwiched between the rising wall 48 and the two guide walls 52, 52, and receives a reaction force from the rising wall 48 to print between the two guide walls 52, 52. The tape 100 is strongly clamped to prevent the printing tape 100 from running backward.
[0039]
As described above, since the reverse movement of the printing tape 100 can be prevented, even if the feeding end of the printing tape 100 is about to be drawn into the cartridge case 31 due to some impact, the drawing can be prevented. At this time, the portions that are pressed and sandwiched between the two guide wall portions 52, 52 by the stop roller 61 are the two horizontal non-label portions 112, 112 of the printing tape 100. It does not come off.
[0040]
As shown in FIG. 8, the tape feed port 35 is formed in a slit shape as a whole across the upper case 31a and the lower case 31b, and has narrow portions 63, 63 located at both upper and lower ends. It comprises a wide portion 64 located between the narrow portions 63, 63. The narrow portions 63 correspond to the positions of the non-label portions 112 of the printing tape 100 passing therethrough, and the wide portions 64 correspond to the position of the adhesive label 110. When the printing tape 100 passes through the tape outlet 35, the two non-label portions 112, 112 are in sliding contact with the narrow portions 63, 63 while being guided by the narrow portions 63, while the adhesive label 110 is in contact with the tape outlet 35. Pass here without any contact with the edge of. Therefore, the adhesive label 110 is not peeled off at the tape outlet 35 as well.
[0041]
On the other hand, as shown in FIG. 3, the ink ribbon 200 is fed out from a feeding core (feeding spool) 210, overlaps the printing tape 100 near the reverse running prevention mechanism, crosses the opening 34 as it is, and furthermore, It travels along 36 and is wound up by the winding core 220. In this case, the feeding core 210 on the driven side is braked by a braking mechanism described later so that the ink ribbon 200 does not slack. Further, the take-up core 220 on the driving side is prevented from free rotation by a reverse rotation prevention mechanism described later so that the ink ribbon 200 does not slack when the tape cartridge 3 is not mounted on the printing apparatus main body 2. ing.
[0042]
As shown in FIGS. 3, 4, 5, and 9, the feeding core 210 is formed so as to protrude from the inner surface of the upper case 31 a, and to protrude from the inner surface of the lower case 31 b. The upper axial projection 71 and a cylindrical lower axial projection 72 disposed coaxially are rotatably supported. The upper shaft-shaped protrusion 71 is formed short, and the lower shaft-shaped protrusion 72 is formed long so that substantially the lower half of the feeding core 210 is engaged (see FIG. 9). A part of the lower shaft-shaped protrusion 72 is removed in an inverted “U” shape, and a sliding contact piece 73 having spring properties is formed. In addition, a braking spring 75 that urges the sliding contact portion 73 from inside is inserted into the hollow portion 74 of the lower shaft-shaped projection 72. That is, the sliding contact portion 73 and the braking spring 75 constitute a braking mechanism that radially presses the inner peripheral surface of the delivery core 210 to brake the rotation of the delivery core 210.
[0043]
The braking spring 75 is formed by bending a wire (for example, a piano wire), and includes a spring body 75a bent substantially in a “U” shape, and a ring portion 75b formed by bending one end of the spring body in a circular shape. It is composed of The braking spring 75 is inserted into the hollow portion 74 from below, and the ring portion 75b contacts and presses the sliding contact portion 73, and the other end is provided on the inner surface of the upper end of the lower shaft-like projection 72. Abut. The hollow section 74 of the lower shaft-shaped projection 72 is formed in a rectangular shape whose short side is the inner surface of the sliding contact piece 73 so that the braking spring 75 is inserted in an appropriate posture (see FIG. 4). (See FIG. 3).
[0044]
The sliding contact piece 73 includes a main body 73a having a spring property and an urging end 73b that comes into contact with the inner peripheral surface of the feeding core 210. The inner surface of the feeding core 210 is A sliding contact surface 73c having a shape complementary to the surface is formed. That is, the sliding contact piece 73 slides on the inner peripheral surface of the feeding core 210 in a relatively large area, and can apply a stable braking force to the feeding core 210. A first locking projection 73d is formed on the inner surface of the biasing end 73b, while a second locking projection 72a is formed on the inner surface of the upper end of the lower shaft-shaped projection 72 corresponding to the first locking projection 73d. Is formed. When the braking spring 75 is inserted into the hollow portion 74, the ring portion 75b gets over the first locking projection 73d, and then the other end contacts the second locking projection 72a, and the braking spring 75 is lowered. It is set appropriately on the axial projection 72. In addition, the first locking projection 73d acts as a downward stopper and the second locking projection 72a acts as an upward stopper for the set braking spring 75.
[0045]
In such a configuration, the biasing end 73b of the sliding contact piece 73 presses the inner peripheral surface of the feeding core 210 by the braking spring 75, and when the feeding core 210 rotates, the sliding contact surface 73c of the biasing end 73b. Comes into sliding contact with the inner peripheral surface of the feeding core 210. Therefore, even if the inner peripheral surface of the feeding core 210 has irregularities, the irregularities can be absorbed and a stable spring force can be applied. Therefore, the braking force (sliding friction) is also stable, and the back tension with little fluctuation can be applied to the ink ribbon 200.
[0046]
The winding core 220 has a circular upper shaft hole 81 formed in the upper case 31a and a circular lower shaft hole (not shown) formed in the lower case 31b and arranged coaxially with the upper shaft hole 81. It is rotatably supported. A plurality of protrusions 221 are formed on the inner peripheral surface of the take-up core 220 in the circumferential direction. When the tape cartridge 3 is mounted on the printing apparatus main body 2, the take-up reel drive shaft 16 is attached to the plurality of protrusions 221. Are meshed with each other, and the winding core 220 can be driven to rotate (see FIG. 10). At the lower end of the winding core 220, a ratchet-shaped lock receiving portion (not shown) is formed. The lock claw member 91 attached to the lower case 31b is engaged with and disengaged from the lock receiving portion. That is, the lock receiving portion and the lock claw member 91 constitute a reverse rotation preventing mechanism for preventing the winding core 220 from rotating in the reverse direction.
[0047]
The lock claw member 91 includes a member main body 93 rotatably mounted on a pin-shaped projection 92 erected on the lower case 31b, a claw portion 94 extending from the member main body 93 toward the take-up core 220, and a member main body 93. The spring piece 95 and the release piece 96 extending in a “V” shape are integrally formed. In a state where the tape cartridge 3 is not mounted on the printing apparatus main body 2, as shown in FIG. 3, the pawl portion 94 is moved toward the winding core 220 around the pin-shaped protrusion 92 by the urging action of the spring piece 95. The rotation is urged, and the tip of the claw portion 94 is locked in the lock receiving portion of the winding core 220. Thereby, the forward rotation of the winding core 220 is allowed (because of the ratchet wheel), but the reverse rotation is prevented.
[0048]
On the other hand, when the tape cartridge 3 is mounted on the printing apparatus main body 2, as shown in FIG. 10, the release piece 96 engages with the cam projection 9 a formed on the cartridge mounting section 9 of the printing apparatus main body 2, The claw portion 94 is rotated in the opposite direction against the portion 95 to be disengaged from the lock receiving portion of the winding core 220. As a result, the locked state of the winding core 220 by the lock claw member 91 is released. At this time, the take-up core 220 and the take-up reel drive shaft 16 are engaged with each other, so that the take-up core 220 can rotate with no resistance to the lock claw member 91.
[0049]
【The invention's effect】
As described above, according to the braking device and the ribbon cartridge in the ribbon cartridge of the present invention, the sliding contact surface of the sliding contact piece is formed in a shape complementary to the inner peripheral surface of the delivery spool. The spring force does not concentrate on a part of the peripheral surface, and the spring force can be uniformly and stably applied thereto. Therefore, the back tension applied to the ink ribbon can be stabilized with a simple structure.
[Brief description of the drawings]
FIG. 1 is a perspective view of a tape printing apparatus according to an embodiment of the present invention with a tape cartridge removed.
FIG. 2 is an external perspective view of the tape cartridge.
FIG. 3 is a plan view of the tape cartridge with the upper case removed.
FIG. 4 is an exploded perspective view of a lower case of the tape cartridge.
FIG. 5 is an exploded perspective view of the upper case of the tape cartridge.
FIG. 6 is a longitudinal sectional view of a tape cartridge around a printing tape.
FIG. 7 is a vertical cross-sectional view of a tape cartridge around a reverse feeding prevention mechanism.
FIG. 8 is a front view of the tape cartridge around the tape feed port.
FIG. 9 is a vertical cross-sectional view around a pay-out core of the tape cartridge.
FIG. 10 is a plan view of the tape cartridge mounted on the tape printer.
[Explanation of symbols]
1 Tape printer
2 Printer main body
3 tape cartridge
9 Cartridge mounting section
31 Cartridge case
72 Lower shaft projection
73 Sliding piece
73b biasing end
73c sliding contact surface
73d first locking projection
74 hollow
75 Brake spring
75a Spring body
75b Ring part
200 ink ribbon
210 Extension core

Claims (5)

In a braking device for a ribbon cartridge, a delivery spool for feeding an ink ribbon, a hollow shaft-like projection for rotatably holding the delivery spool, and a braking mechanism for braking the rotation of the delivery spool in a cartridge case.
The braking mechanism includes a sliding contact piece having a spring property formed by removing a part of the axial protrusion in a U-shape in an axial direction, and a sliding contact piece inserted into a hollow portion of the axial protrusion. A spring that urges the tip of the contact piece toward the inner peripheral surface of the delivery spool,
The leading end of the sliding contact portion has a sliding contact surface having a shape complementary to the inner peripheral surface of the delivery spool ,
The spring is formed of a wire rod and includes a spring body bent in a substantially “U” shape,
The cross-sectional shape orthogonal to the axial direction of the hollow portion of the shaft-like projection is formed in a rectangular shape in accordance with the planar insertion posture of the spring inserted from one end of the shaft-like protrusion. Braking device in a ribbon cartridge. 2. The braking device according to claim 1, wherein the sliding contact portion extends from one of the inner surfaces of the front and back surfaces of the cartridge to a substantially intermediate portion in the axial direction of the feed spool. 3. The braking device according to claim 1, wherein the axial protrusion is formed integrally with the cartridge case. 4. The ribbon cartridge according to claim 1, wherein the hollow portion of the shaft-like projection is formed with a locking protrusion for locking the spring inserted therein in a retaining state. 5. Braking device. A ribbon cartridge comprising a braking device for the ribbon cartridge according to any one of claims 1 to 4 .

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