Printing device

Abstract

A printing device is provided which prevents breakage by dispersing a shock of a fall when a large shock is applied to a platen roller due to a fall of the printing device or the like. A printing device (1) has a thermal head (19) which performs printing on a tape, and includes: a main body portion (3) having a housing portion (11) capable of housing a roll (15) in which the tape is wound; an opening and closing cover (5) supported to the main body portion (3) so as to be swingable between a closed position in which the housing portion (11) is covered and an open position in which the housing portion (11) is opened; a sensor holder (37) provided to the opening and closing cover (5); and a platen roller holder (35) provided to the sensor holder (37) and rotatably supporting a platen roller (23) which conveys the tape at a position opposite to the thermal head (19) when the opening and closing cover (5) is in the closed position.

Description

TECHNICAL FIELD

[0001] The present application relates to a printing device. BACKGROUND

[0002] A printing device is known that holds a roll on which a printing medium is wound inside and performs printing by paying out the printing medium from the roll. For example, a printing device is described in Patent Literature 1 in which a platen roller holder that supports a platen roller in a rotatable manner is provided at a front end portion of an openable and closable cover. The platen roller holder is firmly fixed to the cover by a plurality of screws.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT LITERATURE

[0005] Patent Literature 1: Japanese Patent Application Publication No. 2019-181764 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] The printing device of the above-described conventional technology can be subjected to a load to the platen roller due to an impact of a fall in a state in which the cover is closed. In this case, since the platen roller holder and the cover are directly fixed, the impact of the fall is not dispersed and the screw fastening portion or the like of the platen roller holder can be broken. This can also occur when an impact is applied due to a collision with an object or the like in addition to a fall.

[0008] An object of the present application is to provide a printing device that can prevent breakage when a large impact is applied due to a fall or the like of the printing device.

[0009] MEANS FOR SOLVING THE PROBLEMS

[0010] In order to achieve the above object, the printing device of the present application has a print head that performs printing on a printing medium, characterized by comprising: a main body portion having a housing portion that can house the printing medium; an openable and closable cover supported on the main body portion in a manner that can swing between a closed position that covers the housing portion and an open position that opens the housing portion; a support member provided to the openable and closable cover; and a platen roller holder provided to the support member that supports a platen roller that conveys the printing medium at a position opposite the print head when the openable and closable cover is in the closed position in a rotatable manner.

[0011] The printing device of the present application has a print head, a main body portion, an openable and closable cover, a support member, and a platen roller holder. The platen roller holder supports a platen roller that conveys a printing medium at a position opposite the print head when the openable and closable cover is in a closed position in a rotatable manner. The openable and closable cover opens and closes a housing portion in which the printing medium is housed. The support member is fixed with respect to the openable and closable cover, and the platen roller holder is fixed with respect to the support member.

[0012] According to the present application, the impression roller holder is not directly fixed to the cover, but is fixed to the cover via the support member. For example, when a large impact is applied to the impression roller in the case of an accidental fall of the printing device, the impact is not directly transmitted from the impression roller holder to the cover, but is transmitted from the impression roller holder to the cover via the support member. According to the present application, by deforming the member that fixes the impression roller holder and the support member, the support member, the member that fixes the support member and the cover, and the like, respectively, the impact of the fall can be dispersed to prevent breakage.

[0013] Effects of the Invention

[0014] According to the present application, when a large impact is applied to the impression roller due to a fall of the printing device or the like, breakage can be prevented by dispersing the impact of the fall. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a perspective view from the upper right front side showing the overall structure of the printing device in a state in which the cover is opened.

[0016] Figure 2 is a sectional view showing the sectional structure of the printing device in a state in which the cover is closed.

[0017] Figure 3 is an exploded perspective view from the lower left rear side showing the fixing structure of the impression roller holder and the sensor holder with respect to the cover.

[0018] Figure 4 is a plan view showing the structure of the inside of the cover.

[0019] Figure 5 is a sectional view at V-V section in FIG. 4. Figure 4

[0020] Figure 6 is a sectional view at VI-VI section in FIG. 4. Figure 4

[0021] Figure 7 is a perspective view from the lower right front side showing the peeling mechanism.

[0022] Figure 8 is a sectional view showing the structure of the inside of the cover in a state in which the peeling mechanism is attached.

[0023] Figure 9 is a sectional view showing the structure of the inside of the cover in a state in which the peeling mechanism is attached. DETAILED DESCRIPTION

[0024] Hereinafter, with respect to one embodiment of the present application, the description will be given while referring to the drawings.​​Figure 1 The printing device 1 is connected to an external terminal (not shown) via a signal cable. The printing device 1 prints characters such as letters, figures, and the like on a print medium based on print data received from the external terminal. The external terminal is, for example, a general-purpose personal computer (PC). The printing device 1 can be driven by a battery. The printing device 1 is used by being carried by a user in a job by being attached to a belt, for example, via a belt clip (not shown). The printing device 1 is defined as a printing device that prints characters on a print medium. Figure 1 The right lower side, the left upper side, the right upper side, the left lower side, the upper side, and the lower side of the printing device 1 are defined as the right side, the left side, the rear side, the front side, the upper side, and the lower side of the printing device 1, respectively.

[0025] <1. Overall structure of printing device>

[0026] The overall structure of the printing device in a state in which the cover is opened is shown in Figure 1 The cross-sectional structure of the printing device in a state in which the cover is closed is shown in Figure 2 As shown in Figure 1 and Figure 2 The printing device 1 includes a main body portion 3 and a cover 5. The main body portion 3 and the cover 5 are formed of synthetic resin, for example. The main body portion 3 is a substantially rectangular parallelepiped shape, and has a bottom portion 7 and a front cover portion 9. The bottom portion 7 covers an internal region of the printing device 1 from the lower side. The front cover portion 9 covers substantially half of the front side of the internal region of the printing device 1 from the upper side. A housing portion 11 is provided in a portion of the bottom portion 7 on the rear side of substantially half. As shown in Figure 1 , the upper side of the housing portion 11 is opened by an opening portion 13 formed in the main body portion 3.

[0027] As shown in Figure 2 , a tape 15 is housed in the housing portion 11. The tape 15 is constituted by winding a tape, which is a long strip-shaped backing paper to which a plurality of thermal labels are attached discretely, around a cylindrical core. The tape is an example of a print medium. A cutting knife 17 is provided at a front end portion of the opening portion 13 in the main body portion 3. The cutting knife 17 cuts off a portion of the tape after printing. A thermal head 19 is provided below the cutting knife 17. The thermal head 19 prints characters on the thermal labels by heating. The thermal head 19 is an example of a print head. The cutting knife 17 and the thermal head 19 are each provided extending in the left-right direction.

[0028] As shown in Figure 1 , a locking portion 21 is provided at each of the left and right end portions of the opening portion 13 in the main body portion 3. The lower end portion of each locking portion 21 is supported so as to be swingable with respect to the upper end portion. Details will be described later, and a platen roller holder 35 that supports a platen roller 23 so as to be rotatable is provided in the cover 5. In a case in which the cover 5 is in a closed position (refer to Figure 2), each of the locking portions 21 is locked with a bearing 25 provided at both ends of the platen roller 23 of the cover 5. When a user presses a handle 27 provided at the right side surface of the main body 3, the upper end portion of each of the locking portions 21 swings to the rear, thereby releasing the locking with the bearing 25.

[0029] As shown in Figure 1 , the cover 5 is supported to the main body 3 so as to be swingable between a closed position and an open position by a support shaft 31 extending in the left-right direction provided at the upper end portion of the rear wall 29 of the main body 3. The cover 5 covers the upper side of the housing portion 11 in the case of the closed position (refer to Figure 2 ). The cover 5 opens the housing portion 11 in the case of the open position (refer to Figure 1 ). The cover 5 is urged by an urging member not shown toward the swing to the open position from the closed position. Hereinafter, each direction of the printing device 1 is applied to the cover 5 with the cover 5 in the closed position (refer to Figure 2 ) as a reference.

[0030] As shown in Figure 1 and Figure 2 , a platen roller holder 35 is arranged at the front end portion of the cover 5. The platen roller holder 35 supports the platen roller 23 so as to be rotatable. The platen roller 23 conveys the tape at a position opposite to the thermal head 19 when the cover 5 is in the closed position. The rotation axis of the platen roller 23 is provided so as to extend in the left-right direction. The rotation axis of the platen roller 23 is supported so as to be rotatable by a cylindrical bearing 25 arranged at the left-right direction outer side of both end portions of the platen roller 23. The bearing 25 is held to the platen roller holder 35.

[0031] The platen roller holder 35 is provided to a sensor holder 37. The sensor holder 37 is provided at the front side of the cover 5. That is, the platen roller holder 35 is provided to the cover 5 via the sensor holder 37. The sensor holder 37 supports a sensor 39 that detects the presence or absence of the tape conveyed by the platen roller 23. The sensor 39 is, for example, an optical type reflection sensor. The sensor holder 37 is an example of a support member.

[0032] As shown in Figure 1 , each of the recesses 41 of the main body 3 receives the corresponding bearing 25 from the lower side when the cover 5 is made to be in the closed position. Each of the locking portions 21 is locked with the corresponding bearing 25 from the upper side when the cover 5 is made to be in the closed position. Thereby, the cover 5 is maintained to be in the closed position. If the handle 27 is pressed when the cover 5 is in the closed position, each of the locking portions 21 is released from the corresponding bearing 25. The cover 5 swings from the closed position (refer to Figure 2 ) to the open position (refer to Figure 3 ) by the force of the urging member.

[0033] As shown in Figures 4-6As shown, the thermal head 19 and the platen roller 23 are close to each other when the shutter 5 is in the closed position. The platen roller 23 presses the tape against the thermal head 19 with the tape disposed between the platen roller 23 and the thermal head 19. The platen roller 23 is rotated by driving of a not-shown motor to convey the tape while pressing the tape against the thermal head 19. The tape printed by the thermal head 19 is discharged to the outside through the discharge port 43.

[0034] <2. Fixing configuration of platen roller holder and sensor holder>

[0035] In Figures 3-6 , a fixing configuration of the platen roller holder 35 and the sensor holder 37 with respect to the shutter 5 is shown. In Figure 2 , a structure of an inner side of the shutter 5 is shown. In Figure 3 , with the shutter 5 in the closed position as a reference (refer to Figure 4 ), each direction of the printing device 1 is applied to the shutter 5.

[0036] As shown in Figure 3 and Figure 5 , the sensor holder 37 has a base portion 45 and a receiving portion 47. The base portion 45 is provided on both sides in a left-right direction parallel to the axis AX1 direction of the platen roller 23 on an upper side of the sensor holder 37. The left-right direction is an example of the first direction. Each base portion 45 has a first base portion 45A provided on a front side in a front-rear direction orthogonal to the left-right direction and a second base portion 45B provided on a rear side in the front-rear direction. The front-rear direction is an example of the second direction, the front side is an example of one side of the second direction, and the rear side is an example of the other side of the second direction. As shown in Figure 3 and Figure 4 , the first base portion 45A and the second base portion 45B are fixed to the protrusions 51 of the shutter 5 by screws 49.

[0037] As shown in Figure 3 and Figure 6 , the platen roller holder 35 is mounted and fixed to the receiving portion 47. The receiving portion 47 is provided extending in a front direction and a lower direction on a left-right center of the sensor holder 37. The receiving portion 47 has a first receiving portion 47A and a second receiving portion 47B on both sides in the left-right direction. The first receiving portion 47A and the second receiving portion 47B are provided sandwiching the sensor 39 in the left-right direction.

[0038] The platen roller holder 35 has a mounting portion 53 mounted and fixed to the receiving portion 47 of the sensor holder 37. The mounting portion 53 has a first mounting portion 53A and a second mounting portion 53B on both sides in the left-right direction. As shown in Figure 4 and Figure 4As shown, the first mounting portion 53A is fixed to the first receiving portion 47A by a screw 55, and the second mounting portion 53B is fixed to the second receiving portion 47B by a screw 55.

[0039] As shown, the receiving portions 47 of the sensor holder 37 are provided at positions further from the axis AX2 of the support shaft 31 than the base portions 45 in the front-rear direction. The mounting portions 53 of the platen roller holder 35 support the platen rollers 23 at positions further from the axis AX2 of the support shaft 31 than the base portions 45. Figure 7 As shown, the positions of the base portions 45 of the left and right sides in the left-right direction are on the outer side of the left-right direction than the positions P1, P2 of the end portions of the corresponding platen rollers 23 in the left-right direction. The positions of the first and second receiving portions 47A, 47B of the sensor holder 37 on the left and right sides in the left-right direction are on the inner side of the left-right direction than the positions P1, P2 of the end portions of the corresponding platen rollers 23 in the left-right direction. The positions of the first and second mounting portions 53A, 53B of the platen roller holder 35 on the left and right sides in the left-right direction are on the inner side of the left-right direction than the positions P1, P2 of the end portions of the corresponding platen rollers 23 in the left-right direction.

[0040] Figures 8-9 <3. Effects of the Embodiment>

[0041] The printing device 1 of the above-described embodiment is provided with the thermal head 19, the main body portion 3, the opening and closing cover 5, the sensor holder 37, and the platen roller holder 35. The platen roller holder 35 rotatably supports the platen rollers 23 that convey the tape at positions opposite the thermal head 19 when the opening and closing cover 5 is in the closed position. The opening and closing cover 5 opens and closes the housing portion 11 in which the tape is housed. The sensor holder 37 is fixed with respect to the opening and closing cover 5, and the platen roller holder 35 is fixed with respect to the sensor holder 37.

[0042] According to the present embodiment, the platen roller holder 35 is not directly fixed to the opening and closing cover 5, but is fixed to the opening and closing cover 5 via the sensor holder 37. For example, when a large impact is applied to the platen rollers 23 in the case of the printing device 1 falling by mistake or the like, the impact is not transmitted directly from the platen roller holder 35 to the opening and closing cover 5, but is transmitted from the platen roller holder 35 to the opening and closing cover 5 via the sensor holder 37. According to the present embodiment, by the respective deformations of the platen roller holder 35, the sensor holder 37, and the like, it is possible to disperse the impact of the fall applied to the platen rollers 23, and it is possible to prevent breakage.

[0043]

[0044] ​​Further, in the present embodiment, in particular, the sensor holder 37 has a base portion 45 and a receiving portion 47. The sensor holder 37 is fixed to the shutter 5 at the base portion 45. The sensor holder 37 is fixedly installed at the receiving portion 47. The receiving portion 47 is provided at a position farther from the support shaft 31 than the base portion 45. Thus, in the sensor holder 37, a certain degree of distance is created between the receiving portion 47 and the base portion 45. According to the present embodiment, when an impact transmitted from the impression roller holder 35 to the receiving portion 47 is transmitted to the shutter 5 via the base portion 45 as described above, the sensor holder 37 itself can be deformed to some extent by the above distance, and the falling impact is easily dispersed.

[0045] Further, in the present embodiment, in particular, the impression roller holder 35 has a mounting portion 53. The impression roller holder 35 is fixedly installed at the mounting portion 53 with respect to the receiving portion 47 of the sensor holder 37. The support position of the impression roller 23 in the impression roller holder 35 is provided at a position farther from the support shaft 31 than the mounting portion 53. Thus, in the impression roller holder 35, a certain degree of distance is created between the above support position and the mounting portion 53. According to the present embodiment, when an impact applied to the impression roller 23 is received at the above support position of the impression roller holder 35 and transmitted to the receiving portion 47 of the sensor holder 37 via the mounting portion 53 as described above, the impression roller holder 35 itself can be deformed to some extent by the above distance, and the falling impact is easily dispersed.

[0046] Further, in the present embodiment, in particular, the base portions 45 of the sensor holders 37 provided on both sides in the left-right direction are located at positions farther from the both end portions of the impression roller 23 in the left-right direction than positions PI, P2. According to the present embodiment, compared with a case where the left-right direction positions of the both end portions of the impression roller 23 and the base portions 45 are the same as each other, it is possible to lengthen a path when an impact applied to the impression roller 23 is transmitted to the shutter 5 via the sensor holders 37, and it is possible to disperse the falling impact.

[0047] Further, in the present embodiment, in particular, the first receiving portions 47A and the second receiving portions 47B of the sensor holders 37 provided on both sides in the left-right direction are located at positions closer to the both end portions of the impression roller 23 in the left-right direction than positions PI, P2. According to the present embodiment, compared with a case where the left-right direction positions of the both end portions of the impression roller 23 and the receiving portions 47A, 47B are the same as each other, it is possible to lengthen a path when an impact applied to the impression roller 23 is transmitted to the sensor holders 37 via the impression roller holder 35, and it is possible to disperse the aforementioned falling impact.

[0048] Further, in the present embodiment, particularly, the first mounting portion 53A and the second mounting portion 53B of the impression roller holder 35 provided on both sides in the left-right direction are positioned at inner sides in the left-right direction than the positions PI, P2 of the both end portions of the impression roller 23. According to the present embodiment, compared with the case where the left-right direction positions of the both end portions of the impression roller 23 and the mounting portions 53A, 53B are the same as each other, it is possible to lengthen the path when the impact applied to the impression roller 23 is transmitted to the sensor holder 37 via the impression roller holder 35, and it is possible to disperse the aforementioned dropped impact.

[0049] Further, in the present embodiment, particularly, as the base portion 45 of the sensor holder 37, a first base portion 45A on the front side in the front-rear direction and a second base portion 45B on the rear side are provided. According to the present embodiment, it is possible to transmit the impact transmitted from the impression roller holder 35 to the opening and closing cover 5 by separating the impact to both sides in the front-rear direction using the first base portion 45A and the second base portion 45B, and thus it is possible to stably disperse the impact.

[0050] <4. Modified example>

[0051] Note that the present application is not limited to the above-described embodiments, and various modifications can be made within the scope of the gist and the technical idea thereof.

[0052] As described above, as the printed medium of the printing device 1, a tape is used which is a long strip-shaped backing paper on which a plurality of thermal labels are discretely attached. In correspondence thereto, there is a case where a peeling mechanism which peels the thermal labels from the backing paper of the tape is used as an option. The present modified example is an example of the case where the peeling mechanism is used.

[0053] The structure of the peeling mechanism 57 before being mounted to the main body portion 3 is shown in Figures 7-9 The structure of the inside of the opening and closing cover 5 in a state where the peeling mechanism 57 is mounted to the main body portion 3 is shown in Figure 2 The inside of the opening and closing cover 5 in a state where the peeling mechanism 57 is mounted to the main body portion 3 is shown in Figures 7-9 In Figures 7-9 , the directions of the printing device 1 are applied to the opening and closing cover 5 with reference to the opening and closing cover 5 in the closed position. Note that in Figure 7 , the illustration of the main body portion 3 is omitted.

[0054] As shown in Figure 9 , the peeling mechanism 57 is mounted to a position which is in the upper surface of the main body portion 3 and which is in the rear end portion and which is in the position which is in the front end portion of the opening and closing cover 5 in the closed position and which is in the upper end portion. As shown in Figure 9 and Figure 7As shown, the peeling mechanism 57 has a peeling roller 59 and a holding member 69 that holds the peeling roller 59 in a rotatable manner. The peeling roller 59 extends in the left-right direction. The impression roller holder 35 has a bent portion 61. The bent portion 61 is an elongated bar shape and extends in the left-right direction in parallel with the impression roller 23. As shown in FIG. 2, the peeling roller 59 is pressed against the impression roller 23 when the cover 5 is in the closed position. The backing paper of the tape conveyed by the impression roller 23 is bent by the bent portion 61 and is sandwiched by the peeling roller 59 and the impression roller 23. If the impression roller 23 rotates, the backing paper is conveyed and the peeling roller 59 also rotates, and the backing paper is discharged. The thermal label pasted to the backing paper is conveyed without being bent by the bent portion 61 by its rigidity. That is, the thermal label is peeled from the backing paper and is discharged. Figure 8 As shown, the peeling mechanism 57 has a peeling roller 59 and a holding member 69 that holds the peeling roller 59 in a rotatable manner. The peeling roller 59 extends in the left-right direction. The impression roller holder 35 has a bent portion 61. The bent portion 61 is an elongated bar shape and extends in the left-right direction in parallel with the impression roller 23. As shown in FIG. 2, the peeling roller 59 is pressed against the impression roller 23 when the cover 5 is in the closed position. The backing paper of the tape conveyed by the impression roller 23 is bent by the bent portion 61 and is sandwiched by the peeling roller 59 and the impression roller 23. If the impression roller 23 rotates, the backing paper is conveyed and the peeling roller 59 also rotates, and the backing paper is discharged. The thermal label pasted to the backing paper is conveyed without being bent by the bent portion 61 by its rigidity. That is, the thermal label is peeled from the backing paper and is discharged.

[0055] As shown, the peeling mechanism 57 has a peeling roller 59 and a holding member 69 that holds the peeling roller 59 in a rotatable manner. The peeling roller 59 extends in the left-right direction. The impression roller holder 35 has a bent portion 61. The bent portion 61 is an elongated bar shape and extends in the left-right direction in parallel with the impression roller 23. As shown in FIG. 2, the peeling roller 59 is pressed against the impression roller 23 when the cover 5 is in the closed position. The backing paper of the tape conveyed by the impression roller 23 is bent by the bent portion 61 and is sandwiched by the peeling roller 59 and the impression roller 23. If the impression roller 23 rotates, the backing paper is conveyed and the peeling roller 59 also rotates, and the backing paper is discharged. The thermal label pasted to the backing paper is conveyed without being bent by the bent portion 61 by its rigidity. That is, the thermal label is peeled from the backing paper and is discharged. ​ ​ As shown, the peeling mechanism 57 has a peeling roller 59 and a holding member 69 that holds the peeling roller 59 in a rotatable manner. The peeling roller 59 extends in the left-right direction. The impression roller holder 35 has a bent portion 61. The bent portion 61 is an elongated bar shape and extends in the left-right direction in parallel with the impression roller 23. As shown in FIG. 2, the peeling roller 59 is pressed against the impression roller 23 when the cover 5 is in the closed position. The backing paper of the tape conveyed by the impression roller 23 is bent by the bent portion 61 and is sandwiched by the peeling roller 59 and the impression roller 23. If the impression roller 23 rotates, the backing paper is conveyed and the peeling roller 59 also rotates, and the backing paper is discharged. The thermal label pasted to the backing paper is conveyed without being bent by the bent portion 61 by its rigidity. That is, the thermal label is peeled from the backing paper and is discharged.

[0056] As shown, the peeling mechanism 57 has a peeling roller 59 and a holding member 69 that holds the peeling roller 59 in a rotatable manner. The peeling roller 59 extends in the left-right direction. The impression roller holder 35 has a bent portion 61. The bent portion 61 is an elongated bar shape and extends in the left-right direction in parallel with the impression roller 23. As shown in FIG. 2, the peeling roller 59 is pressed against the impression roller 23 when the cover 5 is in the closed position. The backing paper of the tape conveyed by the impression roller 23 is bent by the bent portion 61 and is sandwiched by the peeling roller 59 and the impression roller 23. If the impression roller 23 rotates, the backing paper is conveyed and the peeling roller 59 also rotates, and the backing paper is discharged. The thermal label pasted to the backing paper is conveyed without being bent by the bent portion 61 by its rigidity. That is, the thermal label is peeled from the backing paper and is discharged.

[0057] ​Note that, not limited to the above, deformation of the impression roller holder 35 can also occur when, for example, the user operates the opening and closing cover 5 with a force stronger than necessary, and the like. In this case, as with the above, after deformation of the impression roller holder 35, the relative positional relationship of the peeling roller 59 to the impression roller 23 does not change, and the peeling roller 59 is able to apply the same pressing force to the impression roller 23 as before the deformation. As a result, the printing process to the tape and the peeling process of the thermal label in the tape from the backing paper after printing can be performed as usual.

[0058] Note that, in the above description, in cases where "vertical", "parallel", "plane", and the like are described, the description is not a strict meaning. That is, these "vertical", "parallel", "plane" allow for design, manufacturing tolerances, errors, and are a meaning of "substantially vertical", "substantially parallel", "substantially plane".

[0059] In addition, in the above description, in cases where appearance dimensions, sizes, "same", "equal", "different", and the like are described, the description is not a strict meaning. That is, these "same", "equal", "different" allow for design, manufacturing tolerances, errors, and are a meaning of "substantially same", "substantially equal", "substantially different".

[0060] In addition, in addition to the above, the above-described embodiments, the methods of each modification example can be appropriately combined and utilized.

[0061] In addition to this, although not exemplified one by one, the present application can be implemented with various modifications within a range not departing from the gist thereof.

[0062] Label Explanation

[0063] 1 Printer

[0064] 3 Main body

[0065] 5 Opening and closing cover

[0066] 11 Housing

[0067] 19 Thermal head (print head)

[0068] 23 Impression roller

[0069] 31 Support shaft portion

[0070] 35 Impression roller holder

[0071] 37 Sensor holder

[0072] 45 Base portion

[0073] 45A First base portion

[0074] 45B second base portion

[0075] 47 receiving portion

[0076] 47A first receiving portion

[0077] 47B second receiving portion

[0078] 53 mounting portion

[0079] 53A first mounting portion

[0080] 53B second mounting portion

[0081] AX1 axis center

[0082] P1, P2 position of end portion of impression roller

Claims

1. A printing apparatus having a printing head which performs printing on a printing medium, characterized by comprising: Possessing: a main body portion having a housing portion capable of housing the printed medium; an opening and closing cover supported to the main body portion in a manner capable of swinging between a closed position covering the housing portion and an open position opening the housing portion; a support member provided to the opening and closing cover; and a platen roller holder fixed to the support member, supporting a platen roller that conveys the printed medium at a position facing the print head when the opening and closing cover is in the closed position in a rotatable manner, the opening and closing cover is supported to the main body portion in a swingable manner by a support shaft, the support member has: a base portion fixed to the opening and closing cover at a first position; and a receiving portion for mounting and fixing the platen roller holder, the receiving portion is provided at a position farther from the support shaft than the base portion, the platen roller holder has a mounting portion mounted and fixed with respect to the receiving portion of the support member at a second position, the platen roller holder supports the platen roller at a third position farther from the support shaft than the mounting portion in a second direction perpendicular to a first direction parallel to the axial direction of the platen roller, in the second direction, the third position is farther from the support shaft than the second position in a state where the opening and closing cover is in the closed position, and the second position is farther from the support shaft than the first position, the second direction is the front and back direction of the printing device in a state of use.

2. The printing device according to claim 1, wherein the base portions are respectively provided on both sides of the support member in a first direction parallel to the axial direction of the platen roller, the positions of the respective base portions on both sides in the first direction are farther outward in the first direction than the positions of the respective end portions of the platen rollers in the first direction.

3. The printing device according to claim 2, wherein the receiving portions are respectively provided on both sides of the support member in the first direction, the positions of the respective receiving portions on both sides in the first direction are farther inward in the first direction than the positions of the respective end portions of the platen rollers in the first direction.

4. The printing device according to claim 2 or 3, wherein the mounting portions are respectively provided on both sides of the platen roller holder in the first direction, the positions of the respective mounting portions on both sides in the first direction are farther inward in the first direction than the positions of the respective end portions of the platen rollers in the first direction.

5. The printing device according to claim 2 or 3, wherein the base portion of the support member includes a first base portion provided on one side in a second direction orthogonal to the first direction and a second base portion provided on the other side in the second direction.

6. The printing device according to any one of claims 1 to 3, further comprising a peeling mechanism that, in response to a case where a printed medium on which a plurality of labels are discretely attached to a long sheet-shaped backing paper is used, has a peeling roller that cooperates with the platen roller to peel the labels from the backing paper. ​ ​ The impression roller holder has a positioning portion that holds the relative position of the peeling roller with respect to the impression roller to a prescribed position.

Images