JP2018176713A - Head pressurization mechanism and tape printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a head pressurization mechanism capable of making variations of a pressure which a platen roller receives from a thermal head small even when a length of the platen roller is different.SOLUTION: When a first tape cartridge 100a is mounted to a cartridge attachment part to which the first tape cartridge 100a housing a first tape Ta and a first platen roller 104a having a first roller length and a second tape cartridge housing a second tape and a second platen roller having a second roller length longer than the first roller length are mounted, a head pressurization mechanism pressurizes a thermal head performing printing on the first tape Ta by first head pressurizing force with respect to the first platen roller 104a. When the second tape cartridge is mounted thereto, the head pressurization mechanism pressurizes the thermal head performing printing on the second tape by second head pressurizing force greater than the first head pressurizing force with respect to the second platen roller.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a head pressing mechanism for pressing a thermal head and a tape printing apparatus.

  Conventionally, as disclosed in Patent Document 1, there is known a printing apparatus (thermal printer) provided with a thermal head and a head pressing mechanism for pressing the thermal head against a platen roller (platen). In this paragraph, the word in parentheses indicates the name in Patent Document 1.

Unexamined-Japanese-Patent No. 2017-019140

  By the way, when the platen roller is accommodated in the tape cartridge instead of being provided in the tape printing apparatus, the length of the platen roller may differ depending on, for example, the difference in the width of the tape among the plural types of tape cartridges. is there. When the length of the platen roller is different, the pressure receiving area of the platen roller which receives the pressure from the thermal head will also be different. For this reason, when the head pressing force for pressing the thermal head against the platen roller is constant, the pressure that the platen roller receives from the thermal head varies with the length of the platen roller. If the pressure received by the platen roller from the thermal head varies, the print density will vary.

  Further, in order to switch the pressure center position of the thermal head with respect to the platen roller according to the type of the tape cartridge mounted on the tape printing apparatus, the platen pin on which the platen roller is inserted In the head pressing mechanism which moves in the axial direction of the above, the pressing pin may be caught in the middle of the movement, and the pressing center may not be switched appropriately.

The present invention addresses at least one of the following.
An object of the present invention is to provide a head pressing mechanism and a tape printing apparatus capable of reducing variation in pressure received by the platen roller from the thermal head even when the length of the platen roller is different.
Another object of the present invention is to provide a head pressing mechanism and a tape printing apparatus capable of appropriately switching the pressing center of the thermal head with respect to the platen roller.

  The head pressing mechanism according to the present invention comprises a first tape cartridge containing a first tape of a first tape width and a first platen roller of a first roller length, and a second tape width wider than the first tape width. A second tape cartridge containing a second tape and a second platen roller having a second roller length longer than the first roller length, and a cartridge mounting portion on which the first tape and the second tape are mounted And a head pressing mechanism provided in the tape printing apparatus including the thermal head for printing, wherein the thermal head is pressed against the first platen roller when the first tape cartridge is mounted. When the second tape cartridge is mounted, the thermal head is larger than the first head pressing force with respect to the second platen roller. Characterized in that pressurized with 2 heads pressure.

  According to this configuration, the head pressing force for pressing the thermal head against the first platen roller or the second platen roller can be detected when the first tape cartridge in which the first platen roller is accommodated is mounted, and the second platen When the second tape cartridge accommodating the roller is mounted, the first head pressing force and the second head pressing force larger than the first head pressing force are different. Therefore, even when the length of the platen roller is different, the variation in pressure which the platen roller receives from the thermal head can be reduced.

  In this case, an elastic body is provided that applies a force to the thermal head so that the thermal head is pressed against the first platen roller or the second platen roller, and the elastic body is attached to the first tape cartridge. Preferably, the amount of elastic deformation is the first amount of deformation, and when the second tape cartridge is mounted, the amount of elastic deformation is a second amount of deformation larger than the first amount of deformation.

  According to this configuration, the elastic deformation amount of the elastic body is larger than the first deformation amount and the first deformation amount when the first tape cartridge is mounted and when the second tape cartridge is mounted. The amount of deformation will be different. As a result, the head pressing force for pressing the thermal head against the first platen roller or the second platen roller can be applied to the first head when the first tape cartridge is mounted and when the second tape cartridge is mounted. The applied pressure can be different from the applied pressure of the second head which is larger than the applied pressure of the first head.

  In this case, one end of the elastic body is attached, and when the first tape cartridge is mounted, the elastic body is positioned at a first elastic position that elastically deforms so that the elastic deformation amount of the elastic body becomes the first deformation amount. And an elastic side member positioned at a second elastic position for elastically deforming the elastic body so that the elastic deformation amount of the elastic body becomes a second deformation amount when the second tape cartridge is mounted. preferable.

  According to this configuration, the position of the elastic side member is different between the first elastic position and the second elastic position when the first tape cartridge is mounted and when the second tape cartridge is mounted. . Thus, the first deformation amount and the second deformation amount larger than the first deformation amount are obtained between the time when the first tape cartridge is mounted and the time when the second tape cartridge is mounted. Can be different.

  In this case, the cover is provided on the cover, and when the cover is closed when the first tape cartridge is mounted, the cover is engaged with the elastic side member to position the elastic side member in the first elastic position. The cover side member located in the second engagement position which engages with the elastic side member to position the elastic side member in the second elastic position when the cover is closed when the second tape cartridge is mounted. , Is preferably provided.

  According to this configuration, the position of the cover side member in the state where the cover is closed is the first engagement position and the second position when the first tape cartridge is attached and when the second tape cartridge is attached. It will differ from the engaged position. Thereby, the position of the elastic side member in the state where the cover is closed is set to the first elastic position and the second elastic position when the first tape cartridge is mounted and when the second tape cartridge is mounted. It can be different.

  In this case, when the first tape cartridge is mounted, the cover side member is positioned at the first engagement position by not engaging with the first tape cartridge when the cover is closed, and the cover side member is When the second tape cartridge is mounted, when the cover is closed, it is preferable that the second tape cartridge be positioned in the second engagement position by engaging with the second tape cartridge.

  According to this configuration, when the cover is closed, whether or not the cover side member engages with the first tape cartridge or the second tape cartridge depends on whether or not the first tape cartridge is mounted and the second tape cartridge. It will be different from when it is installed. Thereby, the position of the cover side member in the state where the cover is closed, the first engagement position and the second engagement position, when the first tape cartridge is mounted and when the second tape cartridge is mounted. And can be different.

  In this case, the cover side member is rotatably provided at the first engagement position and the second engagement position, and the elastic side member is rotatably provided at the first elastic position and the second elastic position. When the cover side member rotates from the first engagement position to the second engagement position, the side member shifts the engagement portion with the cover side member from the first engagement portion to the second engagement portion, (1) When the elastic side member rotates from the elastic position to the second elastic position, and the elastic side member engages with the cover side member in the first engagement region including the first engagement portion, the unit rotation amount of the cover side member Smaller than the first amount of rotation with respect to the unit amount of rotation of the cover side member when it is rotated by the first amount of rotation and engaged with the cover side member in the second engagement region including the second engagement site It is preferable to rotate by the second rotation amount.

  According to this configuration, after the cover side member engages with the second tape cartridge, when the cover side member rotates only to the front of the second engagement position due to the influence of friction or the like, that is, in the second engagement area The elastic side member is positioned near the second elastic position or near the second elastic position even when rotating only to a position engaging with the elastic side member on the near side of the second engagement site. As a result, the difference between the second deformation amount when the cover side member rotates only to the front of the second engagement position and the second deformation amount when the cover side member rotates to the second engagement position is It becomes smaller. Therefore, the difference between the second head pressing force when the cover side member rotates only to the front of the second engagement position and the second head pressing force when the cover side member rotates to the second engagement position Can be made smaller.

  In this case, the second tape cartridge includes a second cartridge case that accommodates the second platen roller, and the second cartridge case is closed when the second tape cartridge is mounted on the cartridge mounting portion. When the cover side member has a first wall facing the cover side and a second wall provided on the peripheral edge of the first wall, the cover side member includes the peripheral edge of the first wall, Preferably, the second tape cartridge is engaged.

  According to this configuration, when the cover is closed, the pressure from the cover side member to the second tape cartridge is received by the second wall. For this reason, it can suppress that a 1st wall part bends by pressurization from a cover side member.

  In this case, a first elastic body that elastically deforms when the first tape cartridge is mounted and applies a force to the thermal head so that the thermal head is pressed against the first platen roller by the first head pressing force And a second elastic body that elastically deforms when the second tape cartridge is mounted, and applies a force to the thermal head so that the thermal head is pressed against the second platen roller by the second head pressing force. Preferably,.

  According to this configuration, the first elastic body elastically deforms when the first tape cartridge is mounted, and the second elastic body elastically deforms when the second tape cartridge is mounted. As a result, the head pressing force for pressing the thermal head against the first platen roller or the second platen roller can be applied to the first head when the first tape cartridge is mounted and when the second tape cartridge is mounted. The applied pressure can be different from the applied pressure of the second head which is larger than the applied pressure of the first head.

  In this case, one end of the first elastic body is attached, and the first elastic side member which elastically deforms the first elastic body when the first tape cartridge is mounted, and one end of the second elastic body are attached. It is preferable that the second elastic side member that elastically deforms the second elastic body be further provided when the two-tape cartridge is mounted.

  According to this configuration, which of the first elastic side member and the second elastic side member is activated differs between when the first tape cartridge is attached and when the second tape cartridge is attached. . Accordingly, the first elastic body can be elastically deformed when the first tape cartridge is mounted, and the second elastic body can be elastically deformed when the second tape cartridge is mounted.

  In this case, the cover is provided to open and close the cartridge mounting portion, and when the cover is closed when the first tape cartridge is mounted, the cartridge is positioned at a first engagement position that engages with the first elastic side member. It is preferable to further include a cover side member positioned in a second engagement position that engages with the second elastic side member when the cover is closed when the tape cartridge is mounted.

  According to this configuration, the position of the cover side member in the state where the cover is closed is the first engagement position and the second position when the first tape cartridge is attached and when the second tape cartridge is attached. It will differ from the engaged position. This makes it possible to differentiate which of the first elastic side member and the second elastic side member is activated between when the first tape cartridge is attached and when the second tape cartridge is attached.

  In this case, the cover side member has a first engaging portion having a shape complementary to the second engaging portion provided in the second tape cartridge, and the first engaging portion is mounted with the second tape cartridge. Preferably, when the cover is closed when engaged, the second engaging portion is engaged.

  According to this configuration, the second tape cartridge can be effectively pushed to the back side in the mounting direction by the cover side member in a state where the first engaging portion is engaged with the second engaging portion.

  The tape printing apparatus according to the present invention comprises a first tape cartridge containing a first tape having a first tape width and a first platen roller having a first roller length, and a second tape width having a second tape width wider than the first tape width. The first tape cartridge is mounted in the cartridge mounting portion in which the second tape cartridge in which the second tape and the second platen length of the second roller length longer than the 2 tape and the first roller length are mounted is mounted and the cartridge mounting portion When printing is performed on the first tape, and when the second tape cartridge is mounted, the thermal head for printing on the second tape and the thermal when the first tape cartridge is mounted on the cartridge mounting portion The head is pressed against the first platen roller by the first head pressure, and when the second tape cartridge is mounted The thermal head, characterized by comprising a head pressing mechanism for pressing a large second head pressure than the first head pressing force against the second platen roller, the.

  According to this configuration, the head pressing force for pressing the thermal head against the first platen roller or the second platen roller can be detected when the first tape cartridge in which the first platen roller is accommodated is mounted, and the second platen When the second tape cartridge accommodating the roller is mounted, the first head pressing force and the second head pressing force larger than the first head pressing force are different. Thereby, even when the length of the platen roller is different, variation in pressure received from the thermal head by the platen roller can be reduced, and printing can be performed while suppressing variation in printing density.

  According to another head pressing mechanism of the present invention, a first tape cartridge containing a first tape and a first platen roller, and a second tape cartridge containing a second tape and a second platen roller are mounted. Head provided in a tape printing apparatus comprising a cartridge mounting portion, a thermal head for printing on the first tape and the second tape, and a platen shaft into which the first platen roller and the second platen roller are inserted A pressure mechanism having a pressure unit, wherein the pressure unit presses the thermal head against the first platen roller when the first tape cartridge is mounted on the cartridge mounting unit; The thermal head is connected, and the connecting portion is provided at a position different from the pressing portion in the axial direction of the platen shaft, When the second tape cartridge is mounted in Tsu di mounting portion, characterized by comprising a second head mechanism for pressurizing the thermal head with respect to the second platen roller by the connecting portion.

  According to this configuration, when the first tape cartridge is mounted, the thermal head is pressed against the first platen roller with the pressing unit as the pressing center. In addition, when the second tape cartridge is mounted, the thermal head is pressed against the second platen roller with the connecting portion provided at a position different from the pressing portion in the axial direction of the platen shaft as the pressing center. Ru. Therefore, the pressing center of the thermal head with respect to the platen roller can be appropriately changed.

  In this case, the first head mechanism has the first head frame provided with the pressing portion, and the first head frame is actuated when the first tape cartridge is mounted to the cartridge mounting portion. The thermal head is pressed against the first platen roller by the pressure unit, and the second head mechanism has the second head frame provided with the connecting portion, and the second tape cartridge is mounted on the cartridge mounting portion. It is preferable that the thermal head be pressed against the second platen roller by the connecting portion by the operation of the second head frame.

  According to this configuration, when the first tape cartridge is mounted, the thermal head is pressed against the first platen roller with the pressing unit as the pressing center by operating the first head frame. When the second tape cartridge is mounted, the thermal head is pressed against the second platen roller with the connection portion as the pressing center by operating the second head frame.

  In this case, in the axial direction of the platen shaft, the distance between the pressing portion and the first central portion, which is the central portion of the first platen roller in the first tape cartridge mounted on the cartridge mounting portion, is A distance between the second central portion of the second tape cartridge mounted in the cartridge mounting portion and the second central portion which is the central portion of the second platen roller, and the connecting portion and the second central portion in the axial direction of the platen axis; It is preferable that the distance of and is shorter than the distance between the connecting portion and the first center point.

  According to this configuration, when the first tape cartridge is mounted, the thermal head is pressed by the pressing unit against the first platen roller, with the vicinity of the first central portion as the pressing center. Thus, the pressing force of the thermal head on the first platen roller is suppressed from being offset in the axial direction of the platen shaft. When the second tape cartridge is mounted, the thermal head is pressed against the second platen roller by the connection section, with the vicinity of the second central portion as the pressing center. Thereby, the pressing force of the thermal head on the second platen roller is suppressed from being offset in the axial direction of the platen shaft.

  In this case, the thermal head is located on the back side in the mounting direction of the first tape cartridge and the second tape cartridge than the connecting portion, and contacts the thermal head when the cover for opening and closing the cartridge mounting portion is opened. Preferably, the apparatus further comprises a head contact portion in which the end on the back side in the mounting direction approaches the platen axis and the end on the near side in the mounting direction is in an inclined posture away from the platen axis.

  According to this configuration, the distance between the end of the thermal head and the platen shaft on the front side in the mounting direction is larger than when the thermal head takes a posture parallel to the platen shaft. Therefore, when the first tape cartridge is mounted on the cartridge mounting portion, the first tape is prevented from being caught by the end of the thermal head on the front side in the mounting direction. Similarly, when the second tape cartridge is mounted on the cartridge mounting portion, the two tapes are prevented from being caught at the end of the thermal head on the front side in the mounting direction.

  In this case, the pressing unit preferably functions as a head contact unit.

  According to this configuration, the pressing unit provided in the second head mechanism functions as the head contact unit, and therefore, a member (for example, a protrusion provided on the exterior) different from the pressing unit functions as the head contact unit. As compared with time, the assemblability of the head pressing mechanism can be improved.

  Another tape printing apparatus according to the present invention is mounted with a first tape cartridge containing a first tape and a first platen roller, and a second tape cartridge containing a second tape and a second platen roller. The cartridge mounting unit includes a cartridge mounting unit, a thermal head that performs printing on the first tape and the second tape, a platen shaft into which the first platen roller and the second platen roller are inserted, and a pressing unit. A first head mechanism for pressing the thermal head against the first platen roller by the pressing unit when the first tape cartridge is mounted, and the thermal head are connected, and the pressing unit is in the axial direction of the platen shaft. It has connecting parts provided at different positions, and when the second tape cartridge is attached to the cartridge attaching part, Characterized by comprising a head pressing mechanism including a second head assembly for pressurizing the thermal head to the second platen roller, the through part.

  According to this configuration, when the first tape cartridge is mounted, the thermal head is pressed against the first platen roller by the pressing unit. Further, when the second tape cartridge is mounted, the thermal head is pressed against the second platen roller by the connecting portion provided at a position different from the pressing portion in the axial direction of the platen shaft. Therefore, the pressing center of the thermal head with respect to the platen roller can be appropriately changed. Therefore, the thermal head is appropriately pressed against the first platen roller or the second platen roller, and printing can be performed well.

1 is a perspective view of a tape printing apparatus according to an embodiment of the present invention. It is a figure which shows a 1st tape cartridge typically. It is a figure which shows a 2nd tape cartridge typically. It is a perspective view of a head pressurization mechanism. It is the figure which looked at the head pressurization mechanism of the state which the head holder rotated in the head pressurization direction from + Z side. It is the figure which looked at the head pressurization mechanism of the state which the head holder rotated in the head release direction from + Z side. FIG. 14 is a perspective view of the head pressing mechanism and the cover in a state in which the second tape cartridge is mounted. It is the figure which looked at the head pressurizing mechanism in the state with which the 2nd tape cartridge was mounted, and a cover from + Z side. FIG. 9 is a cross-sectional view of the head pressing mechanism and the cover in a state in which the first tape cartridge is mounted, taken along the line B-B in FIG. 8. FIG. 9 is a cross-sectional view of the head pressing mechanism and the cover in a state where the second tape cartridge is mounted, taken along the line B-B in FIG. 8. FIG. 9 is a cross-sectional view of the head pressing mechanism in a state in which the cover is opened and the tape cartridge is removed, taken along the line B-B in FIG. 8; It is a perspective view showing the head pressurization mechanism of a modification. It is the figure which looked at the head pressurization mechanism of a modification from the + Z side. It is the figure which looked at the head pressurization mechanism of a modification from the -X side. It is the figure which looked at the head pressurizing mechanism of the modification in the state with which the 1st tape cartridge was mounted from the -X side. It is the figure which looked at the head pressurizing mechanism of the modification in the state with which the 2nd tape cartridge was installed from the -X side. It is a perspective view of a head pressurization rib. FIG. 17 is a view schematically showing a positional relationship between a platen roller and a connecting portion and a pressing portion in a tape cartridge mounted to a cartridge mounting portion in a head pressure mechanism of a modification. It is the figure which looked at the head pressurization mechanism of the modification in the state in which the cover was opened from the-X side.

  Hereinafter, a tape printing apparatus which is an embodiment of a head pressing mechanism and a tape printing apparatus of the present invention will be described. Although the XYZ orthogonal coordinate system is displayed in the following drawings in order to clarify the arrangement relationship of each part, it is needless to say that the present invention is not limited at all.

  The schematic configuration of the tape printing apparatus A will be described based on FIG. The tape printing apparatus A includes an operation panel 1, a display 2, a cover 3, a cartridge mounting portion 4, a thermal head 5, a platen shaft 6, a delivery shaft 7, a winding shaft 8, and a cutter 9. Have.

  The operation panel 1 is provided with various buttons such as a character button and a print button, and receives various operations such as a character input operation and a print execution instruction operation. The display 2 displays characters and the like input from the operation panel 1.

  The cover 3 is provided so as to be rotatable around the end on the + Y side, and is opened and closed when the user detaches the tape cartridge 100 from the cartridge mounting unit 4 or the like. The cover 3 is locked in a closed state by a cover lock mechanism (not shown). When the cover button 11 is pressed, the cover lock mechanism is unlocked, and the cover 3 is opened.

  The tape cartridge 100 is detachably mounted to the cartridge mounting portion 4 from the + Z side. In the following, the mounting direction of the tape cartridge 100 is simply referred to as the “mounting direction”. The tape cartridge 100 includes a tape core 101, a ribbon delivery core 102, a ribbon take-up core 103, a platen roller 104, and a cartridge case 105 accommodating them. A tape T is wound around the tape core 101 in a roll. On the ribbon delivery core 102, the ink ribbon R is wound in a roll.

  The cartridge case 105 includes a first wall 111, a second wall 112, and a third wall 113 (see FIG. 2). The first wall portion 111 is a wall portion facing the cover 3 side when the cover 3 is closed in a state where the tape cartridge 100 is mounted to the cartridge mounting portion 4. That is, the tape cartridge 100 is mounted on the cartridge mounting portion 4 with the first wall 111 facing the + Z side. The second wall 112 is provided at the peripheral edge of the first wall 111 and the third wall 113. That is, the second wall portion 112 constitutes a peripheral wall portion of the cartridge case 105. The third wall 113 faces the first wall 111.

  The cartridge mounting portion 4 is provided with a thermal head 5, a platen shaft 6, a delivery shaft 7 and a take-up shaft 8 protruding from the bottom surface of the cartridge mounting portion 4 to the + Z side.

  The thermal head 5 is provided on the −Y side with respect to the platen shaft 6. The thermal head 5 holds the tape T and the ink ribbon R between itself and the platen roller 104 when the tape cartridge 100 is mounted on the cartridge mounting portion 4 and the cover 3 is closed. In this state, the thermal head 5 generates heat, whereby the ink of the ink ribbon R is transferred to the tape T. The thermal head 5 is pressed against the platen roller 104 by a head pressing mechanism 20 (see FIG. 4 etc.) described later.

  When the tape cartridge 100 is mounted on the cartridge mounting portion 4, the platen roller 104, the ribbon feeding core 102 and the ribbon winding core 103 are respectively inserted into the platen shaft 6, the feeding shaft 7 and the winding shaft 8. Further, when the feed motor 13 (see FIG. 12 and the like) rotates with the cover 3 closed, the tape T and the ink held between the platen roller 104 and the thermal head 5 are rotated by the rotation of the platen roller 104. Ribbon R is sent.

  The tape printing apparatus A can switch between forward feeding and reverse feeding of the tape T and the ink ribbon R by controlling the rotation direction of the feed motor 13. That is, when the feed motor 13 rotates in the forward direction, the platen roller 104 rotates in the forward direction and the ribbon winding core 103 rotates in the winding direction. Thus, the tape T and the ink ribbon R are positively fed. That is, the tape T is fed from the tape core 101 and sent to the tape outlet 12, and the ink ribbon R is fed from the ribbon delivery core 102 and taken up on the ribbon take-up core 103. On the other hand, when the feed motor 13 rotates in the reverse direction, the platen roller 104 rotates in the reverse direction and the ribbon feeding core 102 rotates in the rewinding direction. As a result, the tape T and the ink ribbon R are reversely fed. That is, the tape T discharged from the tape discharge port 12 is pulled back, and the ink ribbon R is rewound to the ribbon feeding core 102.

  The cutter 9 is provided between the cartridge mounting portion 4 and the tape outlet 12. The cutter 9 performs a cutting operation by a cutter motor (not shown), and cuts the tape T sent from the tape cartridge 100 mounted in the cartridge mounting portion 4 to the tape discharge port 12 in the width direction of the tape T. As a result, the printed portion of the tape T is separated and discharged from the tape discharge port 12.

  In the tape printing apparatus A configured as described above, when the user inputs a desired character from the operation panel 1 and issues a print execution instruction, the tape T and the ink ribbon R are positively fed, and the thermal head 5 generates heat. Thus, the input characters are printed on the tape T. After printing, the cutter 9 performs a cutting operation, and the printed portion of the tape T is cut off. Thereafter, the tape T and the ink ribbon R are reversely fed. Thus, the tape T is pulled back until the leading end of the tape T comes close to the nipping position between the thermal head 5 and the platen roller 104, that is, the printing position. For this reason, in the tape T to be printed next, it is possible to shorten the margin generated in the longitudinal direction of the tape T due to the separation distance between the thermal head 5 and the cutter 9.

  The type of tape cartridge 100 will be described based on FIGS. 2 and 3. In the tape cartridge 100, a first tape cartridge 100a (see FIG. 2) and a second tape cartridge 100b (see FIG. 3) having different widths of the tape T are prepared. The first tape cartridge 100a contains a first tape Ta having a first tape width W1 (for example, 36 mm), and the second tape cartridge 100b has a second tape width W2 (for example, 50 mm) wider than the first tape width W1. ) Is accommodated.

  Furthermore, in the first tape cartridge 100a and the second tape cartridge 100b, the length of the platen roller 104, the width of the ink ribbon R, and the thickness of the cartridge case 105 differ depending on the difference in the width of the tape T. That is, in the first tape cartridge 100a, the first platen roller 104a of the first roller length L1 and the first ink ribbon Ra of the first ribbon width M1 are accommodated in the first cartridge case 105a of the first case thickness N1. It is done. The second tape cartridge 100b includes a second platen roller 104b having a second roller length L2 longer than the first roller length L1, and a second ink ribbon Rb having a second ribbon width M2 wider than the first ribbon width M1. The second cartridge case 105b has a second case thickness N2 and is thicker than the first case thickness N1.

  The platen roller 104 is provided with a roller shaft 106 and a roller body 107. The roller shaft 106 is rotatably supported by the first wall portion 111 and the third wall portion 113 of the cartridge case 105 at both ends thereof. The roller shaft 106 is inserted into the cylindrical roller body 107. The roller main body 107 is in contact with the thermal head 5 via the tape T and the ink ribbon R, and is a portion that receives pressure from the thermal head 5. Here, the length of the platen roller 104 means the dimension of the roller body 107 in the axial direction (Z direction) of the platen roller 104. Further, the thickness of the cartridge case 105 means the dimension of the cartridge case 105 in the axial direction (Z direction) of the platen roller 104.

  The head pressing mechanism 20 will be described based on FIGS. 4 to 6. The head pressing mechanism 20 presses the thermal head 5 against the platen roller 104 housed in the tape cartridge 100 mounted in the cartridge mounting portion 4.

  The head pressing mechanism 20 includes a head support shaft 21, a head holder 22, a head pressing spring 23, and a head release spring 24 (see FIG. 12 and the like).

  The head support shaft 21 is fixed to the base frame 27 and protrudes from the base frame 27 to the + Z side. The head support shaft 21 rotatably supports the head holder 22.

  The head holder 22 includes a holder portion 221 and an arm portion 222. The thermal head 5 is held on the surface on the + Y side of the holder portion 221. The arm portion 222 extends from the end on the −Z side of the holder portion 221 to the + X side. The end portion on the + Y side of the head pressure spring 23 is hooked to the arm tip end portion 223 which is the end portion on the + X side of the arm portion 222.

  The head pressing spring 23 is an elastic body for pressing the thermal head 5 against the platen roller 104. The head pressure spring 23 is provided on the −Y side from the arm distal end portion 223. The end of the head pressing spring 23 on the -Y side is hooked to a head pressing lever 25 described later. When the head pressure spring 23 is pulled by the head pressure lever 25 and extends, it applies a force to the arm tip 223 to the -Y side, and the head holder 22 in the head pressure direction, that is, clockwise in the figure. Apply a force (see FIG. 5). As the head pressure spring 23, for example, a tension coil spring can be used.

  The head release spring 24 is an elastic body for separating the thermal head 5 from the platen roller 104. The head release spring 24 is a torsion coil spring wound around the head support shaft 21. The head release spring 24 is directed to the head holder 22 in the head release direction opposite to the head pressing direction by the head pressing spring 23. Apply a force (see FIG. 6). In addition to the torsion coil spring, for example, a tension coil spring provided on the side (+ Y side) opposite to the head pressure spring 23 from the arm distal end 223 may be used as the head release spring 24.

  The head pressure mechanism 20 configured as described above interlocks with the opening and closing of the cover 3 and presses the thermal head 5 against the platen roller 104, and the thermal head 5 separates from the platen roller 104. Can be switched.

  That is, although the details will be described later when the cover 3 is closed, the head pressure spring 23 is pulled by the head pressure lever 25 to extend, whereby the elastic force of the head pressure spring 23 becomes equal to that of the head release spring 24. The elastic force is exceeded, and the head holder 22 rotates in the head pressing direction (see FIG. 5). As a result, the thermal head 5 is pressed against the platen roller 104, and the tape T and the ink ribbon R are nipped between the platen roller 104 and the thermal head 5, that is, a printable state.

  On the other hand, when the cover 3 is opened, although the details will be described later, when the head pressure spring 23 contracts, the elastic force of the head release spring 24 exceeds the elastic force of the head pressure spring 23, and the head holder 22 It rotates in the head release direction (see FIG. 6). As a result, the thermal head 5 is separated from the platen roller 104 (or the platen shaft 6), and the user can easily perform the mounting and demounting operation of the tape cartridge 100 with respect to the cartridge mounting portion 4.

  The head pressing mechanism 20 will be described in more detail based on FIGS. 7 to 11. The head pressing mechanism 20 includes a head pressing lever 25 and a head pressing rib 26 in addition to the head support shaft 21, the head holder 22, the head pressing spring 23 and the head release spring 24 described above.

  The head pressure lever 25 is rotatably supported by a lever support shaft (not shown) extending in the X direction. When the head pressure lever 25 rotates clockwise as shown in FIG. 11 from a state where the head pressure spring 23 is contracted (see FIG. 11), the head pressure spring 23 extends. On the other hand, when the head pressure lever 25 rotates counterclockwise, the head pressure spring 23 contracts.

  The head pressure lever 25 includes a lever shaft hole 251, a pressure spring retaining hole 252, and an engagement area 253.

  The lever shaft hole 251 is provided at a corner located on the most -Y side in a state where the head pressing spring 23 is contracted among the three corners of the head pressing lever 25 formed in a substantially triangular plate shape. (See FIG. 11). A lever support shaft is inserted into the lever shaft hole 251, and the head pressing lever 25 rotates around the lever shaft hole 251 (in other words, around the lever support shaft).

  Of the three corner portions of the head pressing lever 25 formed in a substantially triangular plate shape, the pressing spring retaining hole 252 is the corner portion located closest to the -Z side when the head pressing spring 23 is contracted. (See FIG. 11). The end portion on the -Y side of the head pressure spring 23 is hooked to the pressure spring hook hole 252.

  The engagement area 253 is constituted by one side of the three sides of the head pressure lever 25 formed in a substantially triangular plate shape, the side facing the corner provided with the pressure spring retaining hole 252. The engagement area 253 is an area that engages with the head pressure rib 26 when the cover 3 is closed. More specifically, the engagement area 253 includes a first engagement area 253 a and a second engagement area 253 b in order from the side closer to the lever shaft hole 251. The second engagement area 253 b is continuous with the first engagement area 253 a so as to bend in a direction away from the head pressing rib 26. The first engagement region 253a includes a first engagement portion 255 which engages with the head pressing rib 26 in the closed state of the cover 3 when the first tape cartridge 100a is mounted (FIG. 9). reference). The second engagement region 253b includes a second engagement portion 256 which engages with the head pressing rib 26 in the closed state of the cover 3 when the second tape cartridge 100b is mounted (FIG. 10). reference).

  Although the details will be described later, the position (specifically, the rotational angle position) of the head pressing lever 25 is different between the case where the first tape cartridge 100a is mounted and the case where the second tape cartridge 100b is mounted. As a result, the amount of elastic deformation (specifically, the amount of expansion) of the head pressure spring 23 differs between when the first tape cartridge 100a is attached and when the second tape cartridge 100b is attached. ing. That is, when the cover 3 is closed when the first tape cartridge 100 a is mounted, the head pressure lever 25 is set so that the amount of elastic deformation of the head pressure spring 23 becomes the first amount of deformation. In the first elastic position (see FIG. 9). Further, when the cover 3 is closed when the second tape cartridge 100b is mounted, the head pressure lever 25 has a second deformation amount in which the elastic deformation amount of the head pressure spring 23 is larger than the first deformation amount. As shown in FIG. 10, the head pressing spring 23 is located at a second elastic position where it is elastically deformed. When the cover 3 is opened, the head pressure lever 25 is positioned at a third elastic position where the head pressure spring 23 is contracted (see FIG. 11).

  The head pressing rib 26 is rotatably provided on the cover 3 (in other words, swingable). That is, the head pressing rib 26 is rotatably supported by a rib supporting shaft (not shown) provided in the cover 3 and extending in the X direction.

  The head pressing rib 26 includes a rib shaft hole 261, a connection portion 262, a lever side engaging portion 263, a cartridge side engaging portion 264, and a stopper side engaging portion 265.

  The rib shaft hole 261 is provided at the end on the −Y side of the connection portion 262. A rib support shaft is inserted into the rib shaft hole 261, and the head pressing rib 26 rotates around the rib shaft hole 261 (in other words, around the rib support shaft).

  The connecting portion 262 extends in the Y direction, and connects the lever side engaging portion 263 and the cartridge side engaging portion 264. That is, the lever side engagement portion 263 is provided at the end on the −Y side of the connection portion 262, and the cartridge side engagement portion 264 is provided at the end on the + Y side of the connection portion 262.

  The lever side engagement portion 263 protrudes from the end on the −Y side of the connection portion 262 to the −Z side. When the cover 3 is closed, the lever side engaging portion 263 engages with (specifically contacts with) the engaging area 253 of the head pressure lever 25.

  The cartridge side engagement portion 264 protrudes from the end opposite to the lever side engagement portion 263 with respect to the rib shaft hole 261, that is, from the end on the + Y side of the connection portion 262, to the −X side. When the first tape cartridge 100a is mounted on the cartridge mounting portion 4, the cartridge side engaging portion 264 does not engage with the first tape cartridge 100a when the cover 3 is closed (see FIG. 9). On the other hand, in the state where the second tape cartridge 100b is mounted to the cartridge mounting portion 4, the cartridge side engaging portion 264 engages with the first wall portion 111 of the second tape cartridge 100b when the cover 3 is closed. (Specifically, contact is made) (see FIG. 10). This is because, as described above, the thickness (dimension in the Z direction) of the cartridge case 105 is the first case thickness N1 in the first cartridge case 105a, whereas the first case thickness N1 is in the second cartridge case 105b. This is because the second case thickness N2 is larger than the second case, and the second tape cartridge 100b is thicker.

  Further, when engaging with the first wall 111 of the second tape cartridge 100b, the cartridge side engaging portion 264 engages with the peripheral portion on the + X side of the first wall 111 (see FIG. 8). . Thereby, when the cover 3 is closed, the pressure from the head pressing rib 26 to the second tape cartridge 100 b is received by the second wall 112 provided on the peripheral edge of the first wall 111. For this reason, it can suppress that the 1st wall part 111 bends by pressurization from head compression rib 26. As shown in FIG.

  The stopper side engaging portion 265 is formed of a surface on the + Z side of the end on the −Y side of the connection portion 262. The stopper side engaging portion 265 engages with (specifically contacts with) the stopper portion 31 when the cover 3 is closed. The stopper portion 31 is provided on the inner surface of the cover 3, that is, the surface facing the −Z side when the cover 3 is closed.

  Although the details will be described later, the position of the head pressing rib 26 in the state where the cover 3 is closed (specifically, when the first tape cartridge 100a is attached and when the second tape cartridge 100b is attached) Are different in rotational angle position). Thus, the position of the head pressure lever 25 is different between the case where the first tape cartridge 100 a is mounted and the case where the second tape cartridge 100 b is mounted. That is, when the first tape cartridge 100 a is mounted, the head pressing rib 26 is positioned at the first engagement position where the stopper side engaging portion 265 is engaged with the stopper portion 31 when the cover 3 is closed. (See FIG. 9). In this case, the head pressing rib 26 positions the head pressing lever 25 engaged at the lever side engaging portion 263 from the third elastic position to the first elastic position. On the other hand, when the second tape cartridge 100b is attached, the head pressing rib 26 is in the second engagement position where the cartridge side engaging portion 264 is engaged with the second tape cartridge 100b when the cover 3 is closed. (See FIG. 10). In this case, the head pressing rib 26 positions the head pressing lever 25 engaged at the lever side engaging portion 263 from the third elastic position to the second elastic position. When the head pressing rib 26 is located at the second engagement position, the stopper side engaging portion 265 is separated from the stopper portion 31.

  In addition, when the cover 3 is closed, the head pressing rib 26 causes the head pressing spring 23 to elastically deform in a direction in which the stopper side engaging portion 265 approaches the stopper portion 31, that is, clockwise in FIG. A force is applied via the pressure lever 25.

  Based on FIGS. 9 and 10, the movement of each part of the head pressing mechanism 20 when the cover 3 is closed, the case where the first tape cartridge 100a is mounted and the case where the second tape cartridge 100b is mounted. Compare and explain.

  As shown in FIG. 9, in the state where the first tape cartridge 100a is mounted, when the cover 3 is closed, the head pressure rib 26 has the lever side engaging portion 263 at the third elastic position. The head pressing rib 26 is engaged with the lever 25 so that the stopper side engaging portion 265 approaches the stopper portion 31 by relatively pressing the lever side engaging portion 263 toward the + Z side by the head pressing lever 25. Will rotate. Then, when the stopper side engaging portion 265 engages with the stopper portion 31, the head pressing rib 26 is positioned at the first engaging position.

  In this state, when the cover 3 is further closed, the engagement region 253 of the head pressure lever 25 is pushed by the head pressure rib 26 to the −Z side, and the head pressure lever 25 is subjected to the first elasticity from the third elastic position. Rotate towards position. Then, without the cartridge side engaging portion 264 engaging with the first tape cartridge 100a, the cover 3 is completely closed while the head pressing rib 26 is positioned at the first engaging position, and the cover locking mechanism 3 is locked. At this time, since the head pressing rib 26 is in the first engagement position, the head pressing lever 25 is in the first elastic position. Therefore, the amount of elastic deformation of the head pressure spring 23 is the first amount of deformation. Then, the thermal head 5 is pressed by the first head pressing force against the first platen roller 104 a by the head pressing spring 23 elastically deformed to the first deformation amount.

  In addition, even when the tape cartridge 100 in which the length of the platen roller 104 is shorter and the thickness of the cartridge case 105 is smaller than that of the first tape cartridge 100 a is mounted, the cartridge side engaging portion 264 is the first tape cartridge. Does not engage with 100a. Therefore, also in this case, the thermal head 5 is pressed against the platen roller 104 by the first head pressing force, as in the case where the first tape cartridge 100 a is mounted.

  On the other hand, as shown in FIG. 10, in the state where the second tape cartridge 100b is attached, when the cover 3 is closed, the head pressure rib 26 is not the same as the case where the first tape cartridge 100a is attached. After being positioned at the first engagement position, the head pressure lever 25 engaged with the head pressure rib 26 is rotated from the third elastic position toward the first elastic position. Then, the cartridge side engaging portion 264 engages with the second tape cartridge 100 b before the cover 3 is completely closed. As a result, the cartridge side engaging portion 264 is relatively pressed by the second tape cartridge 100 b toward the + Z side, and the head pressing rib 26 rotates in the direction in which the stopper side engaging portion 265 is separated from the stopper portion 31. 2 Located in the engagement position. Note that, before the head pressing rib 26 is positioned at the first engagement position, that is, before the stopper side engaging portion 265 engages with the stopper portion 31, the cartridge side engaging portion 264 is the second tape cartridge 100b. And may be in the second engagement position.

  In this state, the cover 3 is completely closed and the cover 3 is locked by the cover locking mechanism. At this time, since the head pressing rib 26 is positioned at the second engagement position, the head pressing lever 25 is further rotated beyond the first elastic position to be positioned at the second elastic position. Therefore, the amount of elastic deformation of the head pressure spring 23 is a second amount of deformation larger than the first amount of deformation. Then, the thermal head 5 is pressed against the second platen roller 104b by the second head pressing force larger than the first head pressing force by the head pressing spring 23 elastically deformed to the second deformation amount.

  Here, when the head pressing rib 26 rotates from the first engagement position to the second engaging position, the head pressing lever 25 is engaged with the head pressing rib 26 at the first engagement site 255. From the first elastic position to the second elastic position while being shifted from the second engagement position 256 to the second engagement site 256. At this time, when the head pressing lever 25 engages with the head pressing lever 25 in the first engagement region 253 a, the head pressing lever 25 is a unit rotation amount (for example, 1 °) of the head pressing rib 26. Rotate by the first rotation amount. On the other hand, when the head pressure lever 25 engages with the head pressure lever 25 in the second engagement area 253 b, the head pressure lever 25 is rotated relative to the unit rotation amount of the head pressure rib 26. It rotates by the 2nd rotation amount smaller than the 1st rotation amount. This is because, as described above, the second engagement area 253 b is continuous with the first engagement area 253 a so as to bend in a direction away from the head pressing rib 26. In other words, the second engagement region 253 b is formed in a shape along the movement trajectory of the lever side engagement portion 263 of the head pressing rib 26. For this reason, even if the position of the head pressing rib 26 is different in the range in which the head pressing lever 25 is engaged in the second engagement area 253b, the position of the head pressing lever 25 hardly changes.

  Therefore, after the head pressing rib 26 engages with the second tape cartridge 100b, it is rotated only to the front of the second engaging position due to the influence of friction or the like, that is, the second engaging area 253b. In the case where the head pressing lever 25 rotates only to a position engaging with the head pressing lever 25 on the front side of the second engaging portion 256 among the above, the second resilient position or the second resilient position Located near the As a result, the second deformation amount when the head pressure rib 26 rotates only to the front of the second engagement position and the second deformation amount when the head pressure rib 26 rotates to the second engagement position The difference between Therefore, the second head pressing force when the head pressing rib 26 rotates only to the front of the second engagement position, and the second head pressing force when the head pressing rib 26 rotates to the second engagement position The difference with the pressure can be reduced. The head pressing rib 26 in the case of rotating only to the front of the second engagement position is shown by a two-dot chain line in FIG.

  As described above, according to the head pressing mechanism 20 of the present embodiment, when the first tape cartridge 100 a in which the first platen roller 104 a of the first roller length L 1 is accommodated is attached to the cartridge attachment unit 4. The thermal head 5 is pressed against the first platen roller 104a by the first head pressing force. On the other hand, when the second tape cartridge 100b in which the second platen roller 104b of the second roller length L2 is accommodated is attached to the cartridge attachment unit 4, the thermal head 5 is rotated relative to the second platen roller 104b. The pressure is applied with a second head pressure that is larger than the head pressure.

  According to this configuration, the head pressing force for pressing the thermal head 5 against the first platen roller 104a or the second platen roller 104b is the case where the first tape cartridge 100a in which the first platen roller 104a is accommodated is attached. In the case where the second tape cartridge 100b in which the second platen roller 104b is accommodated is mounted, the first head pressing force and the second head pressing force larger than the first head pressing force are different. Therefore, even when the length of the platen roller 104 is different, the variation in pressure which the platen roller 104 receives from the thermal head 5 can be reduced. As a result, the tape printing apparatus A can perform printing while suppressing variation in print density.

  Here, as a comparative example of the present embodiment, the thermal head 5 is either the first platen roller 104 a or the second platen roller in either the case where the first tape cartridge 100 a is mounted or the case where the second tape cartridge 100 b is mounted. A configuration in which the second head pressing force is applied to 104 b is assumed. In this comparative example, when the first tape cartridge 100 a is mounted, the first platen roller 104 a is a thermal head 5 because the roller length is short and the pressure receiving area is short as the first roller length L 1. The pressure received from the printer becomes excessive and the printing density becomes too high. On the other hand, according to the present embodiment, as described above, the thermal head 5 is pressed against the platen roller 104 by the head pressing force corresponding to the length of the platen roller 104. Even if the pressure difference is different, the pressure received by the platen roller 104 from the thermal head 5 can be within the desired range, and the printing density can be within the desired range.

  Furthermore, when the first tape cartridge 100a is mounted as in the comparative example described above, if the pressure received by the first platen roller 104a from the thermal head 5 becomes excessive, the first tape Ta and the first ink ribbon Ra In the case of reverse feeding, the first ink ribbon Ra may be broken at the edge portion of the thermal head 5. On the other hand, according to the present embodiment, even when the first tape cartridge 100a is attached, excessive pressure received from the thermal head 5 by the first platen roller 104a is suppressed, so the first tape When Ta and the first ink ribbon Ra are reverse-fed, it is possible to suppress the tearing of the first ink ribbon Ra.

  The head pressure spring 23 is an example of the “elastic body” in the present invention. The head pressing lever 25 is an example of the “elastic side member” in the present invention. The head pressing rib 26 is an example of the “cover side member” in the present invention.

  It goes without saying that the present invention is not limited to the above-described embodiment, and various configurations can be adopted without departing from the scope of the present invention. For example, the above-described embodiment can be modified into the following modes in addition to the above.

  When the head pressure lever 25 is rotated from the third elastic position and reaches the second elastic position, a stopper with which the head pressure lever 25 engages (specifically, contacts) It may be provided within the rotation range. Thus, the head pressure lever 25 can be positionally regulated to the second elastic position.

  The head pressure lever 25 is not limited to a configuration in which the head pressure lever 25 is positioned at the first elastic position and the second elastic position by rotating, for example, by sliding in the expansion and contraction direction of the head pressure spring 23 It may be configured to be located at the first elastic position and the second elastic position.

  The head pressing mechanism 20 is not limited to a configuration in which the head pressing force for pressing the thermal head 5 against the platen roller 104 is switched to the two stages of the first head pressing force and the second head pressing force. The configuration may be switched to the above.

  The head pressing mechanism 20 is not limited to the configuration in which the thermal head 5 is pressed to the platen roller 104 in conjunction with the cover 3 being closed. For example, by providing the cartridge mounting portion 4 with an operating member that engages with the mounted tape cartridge 100, interlocking with the mounting of the tape cartridge 100 (in other words, before the cover 3 is closed) Alternatively, the thermal head 5 may be pressed against the platen roller 104. In this case, the actuating member is operated differently in the case where the first tape cartridge 100 a is mounted and in the case where the second tape cartridge 100 b is mounted. Thus, when the first tape cartridge 100a is mounted, the thermal head 5 is pressed against the platen roller 104 by the first head pressing force, and when the second tape cartridge 100b is mounted, the second head pressing force is applied. The thermal head 5 can be pressed against the platen roller 104.

  The elastic body for pressing the thermal head 5 against the platen roller 104 is not limited to a tension coil spring such as the head pressure spring 23, and for example, a compression coil spring may be used. Moreover, as an elastic body, you may use not only a spring but rubber | gum, for example.

  A head pressing mechanism 20A which is a modified example of the head pressing mechanism 20 will be described based on FIGS. 12 to 16. In the following, with regard to the head pressing mechanism 20A, the parts configured similarly to the head pressing mechanism 20 will be omitted as appropriate, and different parts will be mainly described.

  The head pressing mechanism 20A includes a head support shaft 21, a first head mechanism 40a, a second head mechanism 40b, a head release spring 24, a head pressing rib 26, and a rib pressing spring 28. .

  The head support shaft 21 rotatably supports a first head frame 22a and a second head frame 22b described later.

  The first head mechanism 40a applies pressure to the thermal head 5 with respect to the first platen roller 104a when the cover 3 is closed in a state where the first tape cartridge 100a is attached to the cartridge attachment unit 4. The second head mechanism 40b applies pressure to the thermal head 5 with respect to the second platen roller 104b when the cover 3 is closed in a state where the second tape cartridge 100b is attached to the cartridge attachment unit 4.

  The first head mechanism 40a includes a first head frame 22a, a first head pressing spring 23a, and a first head pressing lever 25a.

  The first head frame 22 a is rotatably supported by the head support shaft 21. The first head frame 22a includes a first frame portion 221a and a first arm portion 222a.

  The first frame portion 221a is located between a second frame portion 221b described later and the thermal head 5 held by the second frame portion 221b, and extends in the Z direction. At the end portion on the + Z side of the first frame portion 221a, two pressing portions 224a (only one is shown in FIG. 12 and the like) protruding to the platen shaft 6 side (+ Y side) are provided. The tip end portion of the pressing portion 224a is formed in a substantially arc shape as viewed from the X direction.

  The first arm portion 222 a extends from the end on the −Z side of the first frame portion 221 a to the + X side. An end on the + Y side of the first head pressing spring 23a is hooked on a first arm tip end portion 223a which is an end on the + X side of the first arm portion 222a.

  The first head pressing spring 23a is an elastic body for pressing the thermal head 5 against the first platen roller 104a via the first head frame 22a. The first head pressing spring 23a is provided on the -Y side from the first arm distal end portion 223a. The end on the -Y side of the first head pressing spring 23a is hooked to the first head pressing lever 25a. When the first head pressing spring 23a is pulled and extended by the first head pressing lever 25a, the first head pressing spring 23a applies a force to the first arm tip 223a toward the -Y side, and the first head frame 22a is moved to the head It is rotated in the pressure direction, that is, in the clockwise direction as shown in FIG. As the first head pressing spring 23a, for example, a tension coil spring can be used.

  The first head pressing lever 25a is rotatably supported by a first lever support shaft (not shown) extending in the X direction. When the first head pressing lever 25a rotates counterclockwise in FIG. 14 from the state in which the first head pressing spring 23a is contracted, the first head pressing spring 23a extends. On the other hand, when the first head pressing lever 25a rotates clockwise in FIG. 14, the first head pressing spring 23a contracts.

  The first head pressing lever 25a includes a first lever shaft hole 251a, a first pressing spring retaining hole 252a, and a first engagement point 254a. The first lever support shaft is inserted into the first lever shaft hole 251a, and the first head pressing lever 25a rotates about the first lever shaft hole 251a. An end portion on the -Y side of the first head pressing spring 23a is hooked to the first pressure spring hooking hole 252a. The first engagement portion 254 a is a portion engaged with the head pressing rib 26 when the cover 3 is closed in a state where the first tape cartridge 100 a is mounted to the cartridge mounting portion 4.

  The second head mechanism 40b includes a second head frame 22b, a second head pressure spring 23b, and a second head pressure lever 25b.

  The second head frame 22 b is rotatably supported by the head support shaft 21 and holds the thermal head 5 in a pivotable manner. The second head frame 22b includes a second frame portion 221b and a second arm portion 222b.

  The second frame portion 221 b extends in the Z direction, and the thermal head 5 is held on the platen shaft 6 side (+ Y side). That is, the two connecting portions 224b (only one is shown in FIG. 12 and the like) protruding toward the platen shaft 6 are provided in the substantially middle portion in the Z direction of the second frame portion 221b, and the connecting portions 224b The thermal head 5 is swingably connected with the connecting portion 224b as a swing center. Therefore, when the thermal head 5 is pressed against the platen roller 104, the thermal head 5 swings in accordance with the inclination of the platen roller 104 and follows the platen roller 104. Thereby, the thermal head 5 is uniformly pressed against the platen roller 104.

  The second arm 222 b extends from the end on the −Z side of the second frame 221 b to the + X side. The second arm 222b is provided on the + Z side of the first arm 222a. An end on the + Y side of the second head pressing spring 23b is hooked on a second arm tip end portion 223b which is an end on the + X side of the second arm portion 222b. The second arm distal end portion 223b is located closer to the −X side than the first arm distal end portion 223a.

  The second head pressing spring 23 b is an elastic body for pressing the thermal head 5 against the platen roller 104 via the second head frame 22 b. The second head pressing spring 23 b is provided on the −Y side from the second arm distal end portion 223 b. The end on the -Y side of the second head pressing spring 23b is hooked to the second head pressing lever 25b. When the second head pressure spring 23b is pulled and extended by the second head pressure lever 25b, the second head pressure spring 23b applies a force to the second arm distal end portion 223b toward the -Y side, and the second head frame 22b becomes a head It is rotated in the pressure direction, that is, in the clockwise direction as shown in FIG. The second head pressing spring 23b has a spring constant larger than that of the first head pressing spring 23a. Note that, for example, a tension coil spring can be used as the second head pressing spring 23b.

  The second head pressing lever 25 b is provided on the −X side of the first head pressing lever 25 a. The second head pressing lever 25 b is rotatably supported by a second lever support shaft (not shown) extending in the X direction. When the second head pressing lever 25b rotates counterclockwise in FIG. 14 from a state in which the second head pressing spring 23b is contracted, the second head pressing spring 23b extends. On the other hand, when the second head pressing lever 25b rotates clockwise in FIG. 14, the second head pressing spring 23b contracts.

  The second head pressing lever 25b includes a second lever shaft hole 251b, a second pressing spring retaining hole 252b, and a second engagement point 254b. The second lever support shaft is inserted into the second lever shaft hole 251b, and the second head pressing lever 25b rotates about the second lever shaft hole 251b. An end portion on the -Y side of the second head pressing spring 23b is hooked to the second pressing spring hooking hole 252b. The second engagement portion 254 b is a portion engaged with the head pressing rib 26 when the cover 3 is closed in a state where the second tape cartridge 100 b is mounted to the cartridge mounting portion 4.

  The head release spring 24 is an elastic body for separating the thermal head 5 from the platen roller 104. The head release spring 24 is a torsion coil spring wound around the head support shaft 21, and with respect to the second head frame 22b, in the head release direction opposite to the head pressing direction, that is, counterclockwise in FIG. Apply the force.

  The head pressing rib 26 is rotatably provided on the cover 3. The head pressing rib 26 includes a rib shaft projection 266, a connection portion 262, a lever side engaging portion 263, a cartridge side engaging portion 264, and a spring mounting portion 267.

  The rib shaft projection 266 is engaged with a shaft attachment portion (not shown) provided on the cover 3. The head pressing rib 26 rotates about the rib axial projection 266. The connecting portion 262 extends in the Y direction, and connects the lever side engaging portion 263 and the cartridge side engaging portion 264.

  The lever side engagement portion 263 protrudes from the end on the −Y side of the connection portion 262 to the −Z side. The lever side engaging portion 263 engages with the first head pressing lever 25a when the cover 3 is closed in a state where the first tape cartridge 100a is mounted to the cartridge mounting portion 4, and the second head adding portion 263 is moved. It does not engage with the pressure lever 25b (see FIG. 15). Further, in the state where the second tape cartridge 100b is mounted to the cartridge mounting portion 4, the lever side engaging portion 263 does not engage with the first head pressing lever 25a when the cover 3 is closed, It engages with the two-head pressure lever 25b (see FIG. 16). When the cover 3 is closed in a state where the tape cartridge 100 is not attached to the cartridge attachment portion 4, the lever side engaging portion 263 is pressed by the first head as in the case where the first tape cartridge 100a is attached. It engages with the lever 25a and does not engage with the second head pressure lever 25b (see FIG. 14).

  The cartridge side engagement portion 264 protrudes from the end on the + Y side of the connection portion 262 to the −X side. When the first tape cartridge 100a is mounted on the cartridge mounting portion 4, the cartridge side engaging portion 264 does not engage with the first tape cartridge 100a when the cover 3 is closed (see FIG. 15). On the other hand, in the state where the second tape cartridge 100b is mounted to the cartridge mounting portion 4, the cartridge side engaging portion 264 engages with the second tape cartridge 100b while the cover 3 is closed (see FIG. 16). This is because, as described above, the second tape cartridge 100b is thicker than the first tape cartridge 100a.

  Note that, as shown in FIG. 17, the cartridge side engaging portion 264 may be provided with one or more (two in FIG. 17) engaging convex portions 268. The engagement projection 268 engages with an engagement recess (not shown) provided on the first wall 111 or the second wall 112 of the second tape cartridge 100 b. Thus, even when the second tape cartridge 100b is not properly mounted to the back of the cartridge mounting portion 4, when the cover 3 is closed, the engagement convex portion 268 is engaged with the engagement concave portion. The head pressing rib 26 can effectively push the second tape cartridge 100b to the back side in the mounting direction. The engagement convex portion 268 is an example of the “first engagement portion” in the present invention, and the engagement concave portion is an example of the “second engagement portion” in the present invention. The shape of the first engaging portion provided in the cartridge side engaging portion 264 is not limited to a convex shape, and may be a shape complementary to the second engaging portion provided in the second tape cartridge 100b. For example, the first engagement portion may be concave and the second engagement portion may be convex.

  In addition, the cartridge side engaging portion 264 is an area near the center of gravity of the second tape cartridge 100b in the first wall portion 111 of the second tape cartridge 100b, for example, the length direction (Y direction) of the second tape cartridge 100b. Preferably, it engages with the area between the center of the tape core 101 and the center of the platen roller 104. According to this, it is possible to properly push the second tape cartridge 100b to the back of the cartridge mounting portion 4 without tilting.

  Referring back to FIGS. 12 to 16, the spring attachment portion 267 protrudes from the + Z side surface of the end on the + Y side of the connection portion 262. A rib pressure spring 28 is attached to the spring attachment portion 267.

  One end of the rib pressing spring 28 is attached to the spring attachment portion 267, and the other end is attached to the inner surface of the cover 3. The rib pressure spring 28 has a force with respect to the head pressure rib 26 in a direction in which the cartridge side engaging portion 264 approaches the bottom surface side (−Z side) of the cartridge mounting portion 4, that is, counterclockwise in FIG. Grant For example, a compression coil spring can be used as the rib pressing spring 28. In addition, as the rib pressing spring 28, a torsion coil spring provided on the rib shaft projection 266 may be used.

  As shown in FIG. 15, in the state where the first tape cartridge 100a is mounted to the cartridge mounting portion 4, as described above, when the cover 3 is closed, the cartridge side engaging portion 264 is engaged with the first tape cartridge 100a. Since the head pressing rib 26 is not engaged, the head pressing rib 26 is rotated in the counterclockwise direction by the rib pressing spring 28. At this time, the lever side engaging portion 263 engages with the first head pressing lever 25a and does not engage with the second head pressing lever 25b. As described above, when the cover 3 is closed in a state where the first tape cartridge 100 a is mounted to the cartridge mounting portion 4, the lever pressing portion 263 of the head pressing rib 26 engages with the first head pressing lever 25 a. It is located in the first engagement position to be engaged.

  On the other hand, as shown in FIG. 16, in the state where the second tape cartridge 100b is mounted to the cartridge mounting portion 4, as described above, the cartridge side engaging portion 264 is the second tape cartridge while the cover 3 is closed. In order to engage with 100b, the head pressure rib 26 is rotated in the clockwise direction in the figure against the rib pressure spring 28 from the first engagement position. In this state, when the cover 3 is further closed, the lever side engaging portion 263 engages with the second head pressing lever 25b without engaging with the first head pressing lever 25a. As described above, when the cover 3 is closed with the second tape cartridge 100b mounted on the cartridge mounting portion 4, the lever pressing portion 263 of the head pressing rib 26 engages with the second head pressing lever 25b. It is located in the second engaging position.

  The positional relationship between the platen roller 104 in the tape cartridge 100 mounted in the cartridge mounting portion 4 and the connecting portion 224b and the pressing portion 224a will be described based on FIG. In FIG. 18, the platen shaft 6, the first platen roller 104a, and the second platen roller 104b are illustrated side by side for convenience of explanation.

  Here, in the axial direction (Z direction) of the platen shaft 6, the central portion of the first platen roller 104a in the first tape cartridge 100a mounted to the cartridge mounting portion 4 (strictly speaking, the roller body of the first platen roller 104a The central portion 107) is referred to as a first central portion 120a. Further, in the axial direction of the platen shaft 6, the central position of the second platen roller 104b in the second tape cartridge 100b mounted on the cartridge mounting portion 4 (strictly, the central position of the roller body 107 of the second platen roller 104b) Is referred to as a second central location 120b. In the axial direction of the platen shaft 6, the first central portion 120a is located on the bottom side (in other words, the rear side in the mounting direction) of the cartridge mounting portion 4 with respect to the second central portion 120b.

  The pressing portion 224 a is provided closer to the first central portion 120 a than the second central portion 120 b in the axial direction of the platen shaft 6. That is, in the axial direction of the platen shaft 6, the distance between the pressing portion 224a and the first central portion 120a is shorter than the distance between the pressing portion 224a and the second central portion 120b. It is more preferable that the pressing portion 224a be provided at a position coinciding with the first central portion 120a in the axial direction of the platen shaft 6.

  The connecting portion 224 b is provided closer to the second central portion 120 b than the first central portion 120 a in the axial direction of the platen shaft 6. That is, in the axial direction of the platen shaft 6, the distance between the connecting portion 224b and the second central portion 120b is shorter than the distance between the connecting portion 224b and the first central portion 120a. More preferably, the connecting portion 224 b is provided at a position coinciding with the second central portion 120 b in the axial direction of the platen shaft 6.

  The movement of each part of the head pressing mechanism 20A when the cover 3 is opened will be described based on FIG. In FIG. 19, the first head pressing lever 25a, the second head pressing lever 25b, the head pressing rib 26, and the like are omitted.

  As described above, the second head frame 22b is given a force by the head release spring 24 in the head release direction. Therefore, when the cover 3 is opened, the second head frame 22b rotates in the head release direction until it hits the second stopper (not shown), and is positioned at a predetermined second release position. At this time, the pressing portion 224a of the first head frame 22a is pushed by the thermal head 5 held by the second head frame 22b. Therefore, the first head frame 22a rotates in the head release direction following the second head frame 22b until it hits the first stopper (not shown), and is positioned at a predetermined first release position.

  When the first head frame 22a is at the first release position and the second head frame 22b is at the second release position, the pressing portion 224a of the first head frame 22a is the connecting portion of the second head frame 22b. It is in contact with the back side (−Y side) of the thermal head 5 at a position closer to the platen shaft 6 than 224 b. Further, as described above, the pressing portion 224a is located on the back side (−Z side) in the mounting direction than the connecting portion 224b.

  For this reason, when the cover 3 is opened, the thermal head 5 pivotally connected to the connecting portion 224b has its end on the back side (−Z side) in the mounting direction closer to the platen shaft 6 and the front side in the mounting direction The end on the side (+ Z side) takes an inclined posture away from the platen shaft 6. As a result, the distance between the end of the thermal head 5 and the platen shaft 6 on the front side in the mounting direction is wider than when the thermal head 5 takes a posture parallel to the platen shaft 6. Therefore, when the tape cartridge 100 is attached to and detached from the cartridge attachment unit 4, the tape T and the ink ribbon R are prevented from being caught at the end of the thermal head 5 on the front side in the attachment direction. Therefore, the user can easily perform the mounting and demounting operation of the tape cartridge 100 with respect to the cartridge mounting unit 4. In addition, the occurrence of wrinkles in the ink ribbon R can be suppressed, and the printing quality can be stabilized.

  Thus, the pressing unit 224a functions as the "head contact unit" in the present invention. It should be noted that the thermal head 5 is placed in the mounting direction by contacting the thermal head 5 when the cover 3 is opened, instead of the pressing part 224a and located on the rear side in the mounting direction than the connecting part 224b. A member (for example, a projection provided on the exterior) which has an inclined posture in which the end on the side approaches the platen shaft 6 and the end on the near side in the mounting direction is away from the platen shaft 6 It may function as

  The movement of each part of the head pressing mechanism 20A when the cover 3 is closed in a state where the first tape cartridge 100a is mounted to the cartridge mounting portion 4 will be described based on FIG.

  When the cover 3 is closed in a state where the first tape cartridge 100a is mounted, as described above, the head pressing rib 26 is positioned at the first engagement position, so the lever side engaging portion 263 is moved to the first head loading position. It engages with the pressure lever 25a. Thereby, the first head pressing lever 25a rotates in the counterclockwise direction in FIG. 15, and the first head pressing spring 23a extends. Therefore, when the first head frame 22a rotates in the head pressing direction, and the pressing portion 224a of the first head frame 22a presses the thermal head 5 connected to the second head frame 22b, the thermal head 5 performs the first head frame 22a. 1 Platen roller 104a is pressed.

  Here, as described above, the pressing portion 224a is provided closer to the first central portion 120a than the second central portion 120b in the axial direction of the platen shaft 6 (see FIG. 18). For this reason, the thermal head 5 is pressed against the first platen roller 104a by the pressing unit 224a with the vicinity of the first central portion 120a as the pressing center. Further, as described above, since the pressure portion 224a is formed in a substantially arc shape at its tip, the thermal head 5 can be uniformly pressed regardless of the swing angle of the thermal head 5.

  When the cover 3 is closed in a state where the first tape cartridge 100a is mounted, the thermal head 5 connected to the second head frame 22b is pressed by the pressing portion 224a of the first head frame 22a. The second head frame 22b follows the first head frame 22a and rotates in the head pressing direction.

  The movement of each part of the head pressing mechanism 20A when the cover 3 is closed in a state where the second tape cartridge 100b is mounted to the cartridge mounting portion 4 will be described based on FIG.

  When the cover 3 is closed in a state where the second tape cartridge 100b is mounted, as described above, the head pressing rib 26 is positioned at the second engagement position, so the lever side engaging portion 263 is moved to the second head loading position. It engages with the pressure lever 25b. As a result, the second head pressing lever 25b rotates in the counterclockwise direction in FIG. 16 and the second head pressing spring 23b expands. Therefore, the second head frame 22b is rotated in the head pressing direction, and the thermal head 5 connected to the connecting portion 224b of the second head frame 22b is pressed against the second platen roller 104b.

  Here, as described above, the connecting portion 224b is provided closer to the second central portion 120b than the first central portion 120a in the axial direction of the platen shaft 6 (see FIG. 18). Therefore, the thermal head 5 is pressed against the second platen roller 104b by the connecting portion 224b, with the vicinity of the second central portion 120b as the center of pressure.

  When the cover 3 is closed in the state where the second tape cartridge 100b is mounted, the first frame portion 221a provided between the second frame portion 221b and the thermal head 5 is moved by the second frame portion 221b. As it is pushed, the first head frame 22a follows the second head frame 22b and rotates in the head pressing direction. At this time, the pressing portion 224 a provided in the first frame portion 221 a does not contact the back side of the thermal head 5.

  Here, the cover 3 is closed with the amount of elastic deformation of the first head pressure spring 23a when the cover 3 is closed with the first tape cartridge 100a attached and the second tape cartridge 100b attached. Although the amount of elastic deformation of the second head pressure spring 23b at the time of holding is substantially equal, as described above, the second head pressure spring 23b has a spring constant more than the first head pressure spring 23a. large. Therefore, when the first tape cartridge 100a is attached, the thermal head 5 is pressed against the first platen roller 104a by the first head pressing force, and when the second tape cartridge 100b is attached, the thermal head 5 is thermally attached. The head 5 is pressed against the second platen roller 104b with a second head pressing force larger than the first head pressing force.

  The spring constant of the first head pressure spring 23a and the spring constant of the second head pressure spring 23b may be the same, and in this case, the cover 3 is closed with the first tape cartridge 100a attached. The amount of elastic deformation of the second head pressure spring 23b when the cover 3 is closed with the second tape cartridge 100b attached is greater than the amount of elastic deformation of the first head pressure spring 23a at the time of Just do it. Thus, when the first tape cartridge 100a is attached, the thermal head 5 is pressed against the first platen roller 104a by the first head pressing force, and when the second tape cartridge 100b is attached, the thermal head 5 is thermally attached. The head 5 is pressed against the second platen roller 104b with a second head pressing force larger than the first head pressing force.

  As described above, the head pressing mechanism 20A of the modification includes the first head mechanism 40a and the second head mechanism 40b. The first head mechanism 40a has a pressure part 224a. When the first tape cartridge 100 a is mounted on the cartridge mounting unit 4, the first head mechanism 40 a presses the thermal head 5 against the first platen roller 104 a by the pressing unit 224 a. The second head mechanism 40 b is connected to the thermal head 5 and has a connecting portion 224 b provided at a position different from that of the pressing portion 224 a in the axial direction of the platen shaft 6. When the second tape cartridge 100b is mounted to the cartridge mounting portion 4, the second head mechanism 40b presses the thermal head 5 against the second platen roller 104b by the connecting portion 224b.

  According to this configuration, when the first tape cartridge 100 a is mounted, the thermal head 5 is pressed against the first platen roller 104 a with the pressing unit 224 a as the pressing center. When the second tape cartridge 100b is mounted, the thermal head 5 is the second platen with the connecting portion 224b provided at a position different from the pressing portion 224a in the axial direction of the platen shaft 6 as the pressing center. It is pressed against the roller 104b. Therefore, the pressing center of the thermal head 5 with respect to the first platen roller 104 a and the pressing center of the thermal head 5 with respect to the second platen roller 104 b can be switched appropriately.

  Further, according to the head pressing mechanism 20A, the pressing portion 224a is provided closer to the first central portion 120a than the second central portion 120b in the axial direction of the platen shaft 6. The connecting portion 224 b is provided closer to the second central portion 120 b than the first central portion 120 a in the axial direction of the platen shaft 6.

  According to this configuration, when the first platen roller 104a is mounted, the thermal head 5 is pressed against the first platen roller 104a with the pressure unit 224a nearing the first central portion 120a as the pressure center. It is pressurized. Thus, the pressing force of the thermal head 5 on the first platen roller 104 a is prevented from being offset in the axial direction of the platen shaft 6. When the second platen roller 104b is mounted, the thermal head 5 is pressed against the second platen roller 104b by the connecting portion 224b, with the vicinity of the second central portion 120b as the pressing center. Thus, the pressing force of the thermal head 5 on the second platen roller 104 b is prevented from being offset in the axial direction of the platen shaft 6.

  The first head pressing spring 23a is an example of the "first elastic body" in the present invention. The second head pressing spring 23 b is an example of the “second elastic body” in the present invention. The first head pressing lever 25 a is an example of the “first elastic side member” in the present invention. The second head pressing lever 25 b is an example of the “second elastic side member” in the present invention.

  Reference Signs List 3 cover, 20 head pressing mechanism, 21 head support shaft, 22 head holder, 23 head pressing spring, 25 head pressing lever (elastic side member), 26 head pressing rib (cover side 31) stopper portion 100a: first tape cartridge 104a: first platen roller 111: first wall portion 112: second wall portion 222a: arm tip portion 251: lever shaft hole 252: 252 Pressure spring retaining hole 253: engagement region 253a: first engagement region 253b: second engagement region 255: first engagement portion 261: rib shaft hole 262: connection portion 263: Lever side engaging portion, 264: cartridge side engaging portion, 265: stopper side engaging portion, Ta: first tape.

Claims (18)

A first tape cartridge containing a first tape of a first tape width and a first platen roller of a first roller length, a second tape of a second tape width wider than the first tape width, and the first roller A second tape cartridge in which a second platen roller having a second roller length longer than the second roller length is accommodated; a cartridge mounting portion on which the second tape cartridge is mounted; and a thermal head that performs printing on the first tape and the second tape And a head pressing mechanism provided in a tape printing apparatus comprising:
When the first tape cartridge is mounted, the thermal head is pressed against the first platen roller by a first head pressing force,
A head pressing mechanism characterized in that when the second tape cartridge is mounted, the thermal head is pressed against the second platen roller by a second head pressing force larger than the first head pressing force. . An elastic body that applies a force to the thermal head so that the thermal head is pressed against the first platen roller or the second platen roller;
When the first tape cartridge is mounted, the elastic deformation amount becomes a first deformation amount, and when the second tape cartridge is mounted, the elastic deformation amount is more than the first deformation amount. The head pressing mechanism according to claim 1, wherein the second deformation amount is large.   At a first elastic position where the elastic body is elastically deformed such that the elastic deformation amount of the elastic body becomes the first deformation amount when one end of the elastic body is attached and the first tape cartridge is mounted. An elastic side member positioned at a second elastic position for elastically deforming the elastic body so that the elastic deformation amount of the elastic body becomes the second deformation amount when the second tape cartridge is mounted; The head pressing mechanism according to claim 2, further comprising: The cover is provided to open and close the cartridge mounting portion, and when the cover is closed when the first tape cartridge is mounted, the elastic side member is engaged to engage the elastic side member to the first elastic position. In the first engagement position, and when the cover is closed when the second tape cartridge is mounted, the elastic side member is engaged to engage the elastic side member in the second elastic position. A cover side member located at a second engagement position located at
The head pressing mechanism according to claim 3, further comprising: The cover-side member is positioned at the first engagement position by not engaging with the first tape cartridge when the cover is closed when the first tape cartridge is mounted.
When the second tape cartridge is mounted, the cover side member is positioned at the second engagement position by engaging with the second tape cartridge when the cover is closed. The head pressing mechanism according to claim 4. The cover side member is rotatably provided at the first engagement position and the second engagement position,
The elastic side member is rotatably provided at the first elastic position and the second elastic position.
When the cover-side member rotates from the first engagement position to the second engagement position, the elastic side member engages with the cover-side member from the first engagement portion to the second engagement portion. Rotating from the first elastic position to the second elastic position while shifting to the part;
The elastic side member rotates by a first rotation amount with respect to a unit rotation amount of the cover side member when engaging with the cover side member in a first engagement region including the first engagement portion. A second rotation amount smaller than the first rotation amount with respect to a unit rotation amount of the cover side member when engaging with the cover side member in a second engagement region including the second engagement portion; The head pressing mechanism according to claim 5, wherein the head pressing mechanism rotates in The second tape cartridge includes a second cartridge case for housing the second platen roller.
The second cartridge case has a first wall facing the cover and the first wall when the cover is closed in a state where the second tape cartridge is mounted on the cartridge mounting portion. And a second wall provided at the peripheral edge,
The head pressing mechanism according to any one of claims 4 to 6, wherein the cover side member engages with the second tape cartridge including the peripheral portion of the first wall portion. The first tape cartridge is elastically deformed when installed, and a force is applied to the thermal head so that the thermal head is pressed against the first platen roller by the first head pressing force. An elastic body,
A second tape cartridge that elastically deforms when the second tape cartridge is mounted, and applies a force to the thermal head so that the thermal head is pressed against the second platen roller by the second head pressing force; An elastic body,
The head pressing mechanism according to claim 1, further comprising: A first elastic side member which elastically deforms the first elastic body when one end of the first elastic body is attached and the first tape cartridge is mounted;
A second elastic side member which elastically deforms the second elastic body when one end of the second elastic body is attached and the second tape cartridge is mounted;
The head pressing mechanism according to claim 8, further comprising:   The cover is provided on a cover for opening and closing the cartridge mounting portion, and the cover is positioned at a first engagement position engaged with the first elastic side member when the cover is closed when the first tape cartridge is mounted. A cover side member located in a second engagement position, which engages with the second elastic side member when the cover is closed when the second tape cartridge is mounted, further comprising: The head pressing mechanism according to 9. The cover side member has a first engaging portion having a shape complementary to a second engaging portion provided on the second tape cartridge,
11. The head pressurization according to claim 10, wherein the first engaging portion engages with the second engaging portion when the cover is closed when the second tape cartridge is mounted. mechanism. A first tape cartridge containing a first tape of a first tape width and a first platen roller of a first roller length, a second tape of a second tape width wider than the first tape width, and the first roller A second tape cartridge containing a second platen roller of a second roller length longer than the length;
A thermal head that performs printing on the first tape when the first tape cartridge is installed in the cartridge installation unit, and performs printing on the second tape when the second tape cartridge is installed;
When the first tape cartridge is mounted on the cartridge mounting portion, the thermal head is pressed against the first platen roller by a first head pressing force, and the second tape cartridge is mounted. A head pressing mechanism for pressing the thermal head against the second platen roller with a second head pressing force larger than the first head pressing force;
A tape printing apparatus comprising: A cartridge mounting portion on which a first tape cartridge containing a first tape and a first platen roller, and a second tape cartridge containing a second tape and a second platen roller are mounted, the first tape and A head pressing mechanism provided in a tape printing apparatus, comprising: a thermal head that performs printing on the second tape; and a platen shaft into which the first platen roller and the second platen roller are inserted.
A first head mechanism having a pressure unit, and pressing the thermal head against the first platen roller by the pressure unit when the first tape cartridge is mounted on the cartridge mounting unit;
The thermal head is coupled, and has a connecting portion provided at a position different from the pressing portion in the axial direction of the platen shaft, and when the second tape cartridge is mounted on the cartridge mounting portion, A second head mechanism for pressing the thermal head against the second platen roller by the connecting portion;
A head pressing mechanism characterized by comprising: The first head mechanism has a first head frame provided with the pressing portion, and when the first tape cartridge is mounted on the cartridge mounting portion, the first head frame is operated. Pressing the thermal head against the first platen roller by the pressing unit;
The second head mechanism has a second head frame provided with the connecting portion, and when the second tape cartridge is mounted to the cartridge mounting portion, the second head frame is operated by the second head mechanism. The head pressing mechanism according to claim 13, wherein the thermal head is pressed against the second platen roller by the connecting portion. In the axial direction of the platen shaft, a distance between the pressing portion and a first central portion, which is a central portion of the first platen roller in the first tape cartridge mounted to the cartridge mounting portion, is the distance A distance between the pressure portion and a second central portion, which is a central portion of the second platen roller in the second tape cartridge mounted to the cartridge mounting portion,
14. The apparatus according to claim 13, wherein a distance between the connecting portion and the second central portion is shorter than a distance between the connecting portion and the first central portion in the axial direction of the platen shaft. The head pressing mechanism according to 14.   It is located on the back side in the mounting direction of the first tape cartridge and the second tape cartridge than the connection portion, and contacts the thermal head when the cover for opening and closing the cartridge mounting portion is opened. The thermal head is further provided with a head contact portion in which the end on the back side in the mounting direction approaches the platen shaft, and the end on the near side in the mounting direction is in an inclined posture away from the platen shaft. The head pressing mechanism according to any one of claims 13 to 15, characterized by the following.   The head pressing mechanism according to claim 16, wherein the pressing unit functions as the head contact unit. A cartridge mounting portion on which a first tape cartridge containing the first tape and the first platen roller, and a second tape cartridge containing the second tape and the second platen roller are mounted;
A thermal head for printing on the first tape and the second tape;
A platen shaft into which the first platen roller and the second platen roller are inserted;
A first head mechanism having a pressure unit, and pressing the thermal head against the first platen roller by the pressure unit when the first tape cartridge is mounted on the cartridge mounting unit; The thermal head is coupled, and the coupling unit is provided at a position different from the pressing unit in the axial direction of the platen shaft, and the coupling is performed when the second tape cartridge is attached to the cartridge attachment unit. A second head mechanism for pressing the thermal head against the second platen roller by a second unit;
A tape printing apparatus comprising:

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