Printing device

Abstract

To provide a printing device that can improve accuracy of an encoder position in a thickness direction of a scale and suppress deformation of an encoder holder due to heat that is generated by a motor.SOLUTION: An encoder holder 55 includes: a first plate part 73 connected to a first body frame 41; a second plate part 75 provided while being spaced in a second direction Db relative to a second plane 59 of a feeding motor 31; and a third plate part for connecting the first plate part 73 to the second plate part 75. An encoder 53 is fitted to the second plate part 75.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a printing device. [Background technology]

[0002] As disclosed in Patent Document 1, there is known a conventional image forming apparatus that includes a motor that drives a pair of rollers, a pulse plate fixed to the output shaft of the motor, and a photointerrupter that detects rotation of the pulse plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2015-193439 A Summary of the Invention [Problem to be solved by the invention]

[0004] In a printing device equipped with a scale fixed to the output shaft of a motor and an encoder that detects the rotation of the scale, as in a conventional image forming device, if the positional accuracy of the encoder in the thickness direction of the scale is low, the scale may come into contact with the encoder and be damaged. Also, if the encoder holder that supports the encoder is in contact with the motor, the encoder holder may be deformed by heat generated by the motor. [Means for solving the problem]

[0005] The printing device of the present invention comprises a motor having a first surface facing a first direction, a second surface facing a second direction opposite to the first direction, and a shaft portion protruding from the second surface in the second direction, a scale fixed to the shaft portion so as to be rotatable integrally with the shaft portion, a motor support member connected to the first surface and supporting the motor, an encoder detecting rotation of the scale, and an encoder holder supporting the encoder, wherein the encoder holder has a first plate portion connected to the motor support member, a second plate portion spaced apart in the second direction from the second surface, and a third plate portion connecting the first plate portion and the second plate portion, and the encoder is attached to the second plate portion. [Brief description of the drawings]

[0006] [Figure 1] FIG. 2 is a perspective view of the printing device with the access cover closed. [Diagram 2] FIG. 2 is a perspective view of the printing device with the access cover open. [Diagram 3] FIG. [Figure 4] FIG. 2 is a perspective view of the internal structure of the printing device. [Diagram 5] FIG. [Figure 6] FIG. 6 is a perspective view of the feed motor and its surroundings, as seen from an angle different from that in FIG. 5. [Figure 7] This is a view of the feed motor and its surroundings seen from the -Z direction. [Figure 8] FIG. 2 is a perspective view of an encoder holder. [Figure 9] This is a view of the feed motor and its surroundings seen from the +X direction, excluding the scale. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] An embodiment of a printing device will be described below with reference to the accompanying drawings. A printing device 1 of this embodiment is used, for example, as a receipt printer in a POS system. In the following, the directions according to the XYZ Cartesian coordinate system shown in each figure will be used for the purpose of explanation only, but these directions are not intended to limit the following embodiment in any way.

[0008] [External structure of the printing device] The external structure of the printer 1 will be described with reference to Figures 1 and 2. The printer 1 comprises a device body 3 and an opening / closing cover 5. The device body 3 is formed in a substantially rectangular parallelepiped shape with an opening 6 on the +Z side, and a roll paper storage section 7 is provided inside the device body 3. The roll paper storage section 7 stores roll paper R around which recording paper P, which is a printing medium, is wound (see Figure 3). The opening / closing cover 5 is rotatably attached to the end of the device body 3 in the +Y direction, and opens and closes the opening 6.

[0009] The printing device 1 includes, as its exterior, a main body exterior part 9, a cutter cover 11, an opening exterior part 12, and a cover exterior part 13.

[0010] The main body exterior 9, cutter cover 11, and opening exterior 12 constitute the exterior of the device main body 3. The main body exterior 9 is formed in the shape of a substantially rectangular parallelepiped box with an opening on the +Z side. The cutter cover 11 is provided in the -Y direction relative to the opening / closing cover 5. When the cutter cover 11 is opened, an auto-cutter 37 (see FIG. 3), which will be described later, appears. An outlet 15 is provided at the boundary between the cutter cover 11 and the opening / closing cover 5. Recording paper P, which is fed from the roll paper R stored in the roll paper storage section 7, is discharged from the outlet 15. The opening exterior 12 is provided on the edge of the opening 6. The cover exterior 13 constitutes the exterior of the opening / closing cover 5.

[0011] The printing device 1 also includes a cover opening button 17, a feed button 19, and a panel unit 21. The cover opening button 17, the feed button 19, and the panel unit 21 are provided at the end in the +X direction on the +Z direction surface of the printing device 1. When the cover open button 17 is pressed, the opening / closing cover 5 opens. When the feed button 19 is pressed, a platen roller 35 (described later) rotates and the recording paper P is fed toward the discharge port 15. The panel unit 21 displays various information such as errors to the user.

[0012] [Internal structure of the printing device] 3 and 4, the internal structure of the printing device 1 will be described. The printing device 1 includes a base frame 23, a main body frame 25, a cover frame 27, a thermal head 29, a feed motor 31, a gear train 33, a platen roller 35, an auto-cutter 37, and a locking mechanism 39.

[0013] The base frame 23 and the main body frame 25 are provided inside the main body exterior part 9. The base frame 23 supports the main body frame 25. The main body frame 25 includes a first main body frame 41 and a second main body frame 43. The first main body frame 41 and the second main body frame 43 are both formed in a substantially rectangular plate shape extending in the Y direction. The second main body frame 43 is provided in the +X direction with respect to the first main body frame 41. A cover support shaft 45 extending in the X direction is provided at the end of the first main body frame 41 and the second main body frame 43 in the +Y direction.

[0014] The cover frame 27 is provided inside the cover exterior part 13. The cover frame 27 is formed in a substantially rectangular frame shape, and is rotatably supported by the main body frame 25 via a cover spindle 45. A cover spindle hole (not shown) that engages with the cover spindle 45 is provided at the end of the cover frame 27 in the +Y direction.

[0015] The thermal head 29 is supported by the main body frame 25. The thermal head 29 includes a plurality of heating elements (not shown), and performs printing on the recording paper P fed from the roll paper R.

[0016] The feed motor 31 is fixed to the -Y direction end of the first main body frame 41. The feed motor 31 is a drive source for the platen roller 35. Note that as the feed motor 31, for example, a DC motor (DC: Direct Current) can be used.

[0017] The gear train 33 is provided on the first main body frame 41. The gear train 33 includes a plurality of gears, and transmits the power of the feed motor 31 to the platen roller .

[0018] The platen roller 35 is rotatably supported at the end of the cover frame 27 in the -Y direction. The platen roller 35 faces the thermal head 29 when the open-close cover 5 is closed. A roller spring (not shown) applies force to the platen roller 35 toward the thermal head 29. As a result, the platen roller 35 holds the recording paper P between itself and the thermal head 29. The platen roller 35 sends the recording paper P held between itself and the thermal head 29 toward the discharge port 15. In other words, when the platen roller 35 rotates, the recording paper P is unwound from the roll paper R and sent toward the discharge port 15.

[0019] A roller gear 47 is provided coaxially with the platen roller 35 and positioned in the −X direction with respect to the platen roller 35. The roller gear 47 meshes with a transmission gear 49 of the gear train 33 and rotates integrally with the platen roller 35.

[0020] The auto-cutter 37 is provided between the platen roller 35 and the discharge outlet 15, and cuts the recording paper P sent to the discharge outlet 15 in the X direction, i.e., in the width direction of the recording paper P, behind the printed portion. Note that the auto-cutter 37 cuts the recording paper P, leaving the end of the recording paper P in the -X direction, so that the cut recording paper P remains at the discharge outlet 15.

[0021] [Feed motor configuration] 5 to 7, the printing device 1 includes a feed motor 31, a scale 51, an encoder 53, and an encoder holder 55. In the following, the -X direction is referred to as a first direction Da, and the +X direction is referred to as a second direction Db (see FIG. 7). The second direction Db is the opposite direction to the first direction Da.

[0022] The feed motor 31 is formed in a substantially cylindrical shape and includes a first surface 57 facing the first direction Da and a second surface 59 facing the second direction Db. That is, the second surface 59 is provided in the second direction Db with respect to the first surface 57. A motor protrusion 61 protrudes from the second surface 59 in the second direction Db. The motor protrusion 61 is provided at substantially the center of the substantially circular second surface 59 and is formed in a substantially short cylindrical shape.

[0023] The shaft portion 63 of the feed motor 31 protrudes from the first surface 57 in the first direction Da and protrudes from the second surface 59 in the second direction Db. The shaft portion 63 is provided approximately at the center of the first surface 57 and the second surface 59. A pinion gear 65 is fixed to the end of the shaft portion 63 in the first direction Da. The pinion gear 65 constitutes the above-mentioned gear train 33 (see FIG. 4). The scale 51 is fixed to the end of the shaft portion 63 in the second direction Db. The scale 51 and the pinion gear 65 rotate integrally with the shaft portion 63.

[0024] A first surface 57 of the feed motor 31 is connected to the first main body frame 41. That is, the feed motor 31 is provided in the second direction Db with respect to the first main body frame 41, and is screwed to the first main body frame 41 by a motor fixing screw 67. The feed motor 31 is supported at the first surface 57 by the first main body frame 41 in a cantilever manner.

[0025] The scale 51 is formed in a disk shape, and is fixed to the shaft portion 63 so that the shaft portion 63 penetrates the scale 51 substantially vertically. That is, the thickness direction of the scale 51 is substantially parallel to the first direction Da and the second direction Db. The scale 51 is provided with a plurality of slits (not shown). Instead of the plurality of slits, the scale 51 may be, for example, a scale in which printed areas and non-printed areas are alternately arranged, or a scale in which thick portions and thin portions are alternately arranged. In other words, the scale 51 may be configured such that low light-transmitting portions and high light-transmitting portions are alternately arranged.

[0026] The encoder 53 detects the rotation of the scale 51. For example, a photointerrupter can be used as the encoder 53. The encoder 53 includes a light receiving / emitting unit 69 and an encoder board 71. A light emitting element and a light receiving element (not shown) are incorporated in the light receiving / emitting unit 69. The light emitting element and the light receiving element are aligned in the thickness direction of the scale 51, i.e., in the X direction, and the scale 51 is provided between the light emitting element and the light receiving element.

[0027] When the feed motor 31 is operated and the scale 51 rotates, the detection light emitted from the light-emitting element to the light-receiving element alternates between being blocked by the scale 51 and being received by the light-receiving element after passing through a slit provided in the scale 51. This causes the encoder board 71 to output a pulse signal with a number of pulses corresponding to the amount of rotation of the scale 51. A control circuit provided in the printing device 1 detects the amount of rotation of the feed motor 31, i.e., the amount of feed of the recording paper P, based on the pulse signal output from the encoder board 71.

[0028] As shown in Fig. 5 to Fig. 8, the encoder holder 55 supports the encoder 53. The encoder holder 55 includes a first plate portion 73, a second plate portion 75, a third plate portion 77, an encoder cover portion 79, a motor cover portion 81, and a wiring holding portion 83. The encoder holder 55 is made of resin and is integrally formed. Note that the third plate portion 77 may include a part or the whole of the encoder cover portion 79.

[0029] The first plate portion 73 is provided at an end portion of the encoder holder 55 in the first direction Da. The first plate portion 73 is formed in a substantially rectangular plate shape substantially parallel to the YZ plane. The first plate portion 73 is provided with a holder fixing hole 85. The first plate portion 73 is provided in the first direction Da relative to the first main body frame 41, and is fixed to the first main body frame 41 by a holder fixing screw 87 inserted into the holder fixing hole 85. That is, the encoder holder 55 is supported by the first main body frame 41 in a cantilever manner at the first plate portion 73.

[0030] The second plate portion 75 is located in the second direction Db with respect to the first plate portion 73, and is provided approximately parallel to the first plate portion 73. The second plate portion 75 is formed in a substantially triangular plate shape that is approximately parallel to the YZ plane. Two encoder fixing portions 89 are provided on the second direction Db surface of the second plate portion 75. The encoder fixing portion 89 is formed in a substantially cylindrical shape that protrudes in the second direction Db from the second direction Db surface of the second plate portion 75. An encoder fixing screw 91 is screwed into the encoder fixing portion 89. That is, the encoder 53 is attached to the second direction Db surface of the second plate portion 75 by the encoder fixing screw 91 engaged with the encoder fixing portion 89.

[0031] An arc portion 93 is provided on the end face in the +Y direction of the second plate portion 75. The arc portion 93 is formed in a shape that follows the circumferential surface of the motor protrusion 61. That is, the second plate portion 75 is provided with a gap in the -Y direction and the +Z direction relative to the motor protrusion 61 (see FIG. 9).

[0032] The third plate portion 77 connects the first plate portion 73 and the second plate portion 75. That is, the third plate portion 77 is formed in a generally rectangular plate shape generally parallel to the XZ plane, with the first plate portion 73 protruding in the +Y direction from an end portion of the third plate portion 77 in the first direction Da, and the second plate portion 75 protruding in the +Y direction from an end portion of the third plate portion 77 in the second direction Db.

[0033] The encoder cover portion 79 is provided in the second direction Db with respect to the second plate portion 75. The encoder cover portion 79 is formed in a plate shape bent into a substantially "L" shape. The encoder cover portion 79 covers the -Y direction and the +Z direction of the encoder 53 fixed to the second plate portion 75.

[0034] In this way, by providing the encoder holder 55 with the encoder cover 79, the function of holding the encoder 53 and the function of preventing foreign matter such as water and paper powder from entering the encoder 53 can be performed by a single part, the encoder holder 55, thereby reducing the number of parts in the printing device 1. The encoder cover 79 can also function as a guide for wiring such as a flexible flat cable connected to the thermal head 29.

[0035] A holder protrusion 95 protrudes in the +Z direction from the end in the second direction Db on the +Z direction surface of the encoder cover 79. A holder cutout portion 97 cut into a substantially rectangular shape is provided at a corner of the holder protrusion 95 in the -Y direction and the +Z direction.

[0036] Here, a regulating frame 99 is provided in the +Z direction relative to the encoder holder 55 (see FIG. 9). The regulating frame 99 is formed in a generally rectangular plate shape generally parallel to the XZ plane. A regulating protrusion 101 protrudes in the +Y direction from the -Z direction end of the regulating frame 99 toward the holder cutout portion 97. That is, the holder protrusion 95 is provided with a gap in the +Y direction and the -Z direction relative to the regulating protrusion 101.

[0037] The motor covering portion 81 is provided in the first direction Da with respect to the second plate portion 75. That is, the motor covering portion 81 is continuous in the first direction Da from the end portion in the first direction Da of the encoder covering portion 79, and is continuous in the +Y direction from the end portion in the +Z direction of the third plate portion 77. The motor covering portion 81 covers the feed motor 31 in the +Z direction.

[0038] In this way, since the encoder holder 55 is equipped with the motor cover portion 81, the function of holding the encoder 53 and the function of preventing foreign matter such as water and paper dust from entering the feed motor 31 can be performed by a single component, the encoder holder 55, thereby reducing the number of components of the printing device 1.

[0039] The wiring holder 83 holds the wiring connected to the components of the printing device 1. The wiring held by the wiring holder 83 is not particularly limited, but examples thereof include a lead wire connected to the feed motor 31, a lead wire connected to the cutter motor 103 (see FIG. 4) provided in the auto-cutter 37, and the like.

[0040] The wiring holding portion 83 includes a first holding portion 105, a second holding portion 107, and a third holding portion 109 in this order from the first direction Da. The first holding portion 105 is continuous with the first plate portion 73. The first holding portion 105, the second holding portion 107, and the third holding portion 109 all protrude in the -Z direction from the -Z direction surface of a rib 111 provided at the -Z direction end of the third plate portion 77. The first placement portion 113 and the third placement portion 115 protrude in the -Y direction from the -Z direction ends of the first holding portion 105 and the third holding portion 109, respectively. The wiring passes through the -Y direction of the first holding portion 105, the +Y direction of the second holding portion 107, and the -Y direction of the third holding portion 109, and is placed on the first placement portion 113 and the third placement portion 115.

[0041] In this way, since the encoder holder 55 is equipped with the wiring holding portion 83, the function of holding the encoder 53 and the function of holding the wiring can be performed by a single component, the encoder holder 55, thereby reducing the number of components in the printing device 1.

[0042] In the encoder holder 55 thus configured, as described above, the surface of the first plate portion 73 in the second direction Db is connected to the first main body frame 41 to which the feed motor 31 is fixed, and the encoder 53 is fixed to the surface of the second plate portion 75 in the second direction Db. Therefore, in the thickness direction of the scale 51, the position of the encoder 53 relative to the first main body frame 41 can be determined by the dimension between the surface of the first plate portion 73 in the second direction Db and the surface of the second plate portion 75 in the second direction Db. Therefore, the positional accuracy of the encoder 53 relative to the first main body frame 41 in the thickness direction of the scale 51 can be improved. Therefore, the scale 51 is prevented from coming into contact with the encoder 53 and being damaged, and erroneous detection of the encoder 53 due to a damaged scale 51 can be avoided.

[0043] As shown in FIG. 7, the distance L1 between the first plate portion 73 and the second plate portion 75 is larger than the sum of the dimension L2 between the first surface 57 and the second surface 59 of the feed motor 31 and the thickness L3 of the first main body frame 41. That is, L1>L2+L3. For this reason, the second plate portion 75 is provided with a distance in the second direction Db from the second surface 59 of the feed motor 31. This prevents heat generated from the feed motor 31 from being transmitted from the second surface 59 of the feed motor 31 to the second plate portion 75 of the encoder holder 55 when the feed motor 31 is operated, and prevents the encoder holder 55 from being deformed by heat. Note that L3 may be the dimension from the surface of the first main body frame 41 to which the first plate portion 73 is fixed to the first surface 57 of the feed motor 31, instead of the thickness of the first main body frame 41.

[0044] As described above, the second plate portion 75 of the encoder holder 55 is provided at a distance from the motor protrusion 61 of the feed motor 31 in the -Y direction and the +Z direction (see FIG. 9). The holder protrusion 95 of the encoder holder 55 is provided at a distance from the regulating protrusion 101 of the regulating frame 99 in the +Y direction and the -Z direction (see FIG. 9).

[0045] For this reason, when the encoder holder 55 is subjected to shock or vibration, the position of the encoder holder 55 in the Y direction and the Z direction is restricted by the feed motor 31 or the restriction frame 99. That is, when the encoder holder 55 is subjected to shock or vibration in the +Y direction, the second plate portion 75 of the encoder holder 55 comes into contact with the motor protrusion portion 61 of the feed motor 31, thereby restricting the encoder holder 55 from being displaced further in the +Y direction. When the encoder holder 55 is subjected to shock or vibration in the -Y direction, the holder protrusion portion 95 of the encoder holder 55 comes into contact with the restriction protrusion portion 101 of the restriction frame 99, thereby restricting the encoder holder 55 from being displaced further in the -Y direction. When the encoder holder 55 is subjected to shock or vibration in the +Z direction, the holder protrusion portion 95 of the encoder holder 55 comes into contact with the restriction protrusion portion 101 of the restriction frame 99, thereby restricting the encoder holder 55 from being displaced further in the +Z direction. When the encoder holder 55 is subjected to impact or vibration in the -Z direction, the second plate portion 75 of the encoder holder 55 comes into contact with the motor convex portion 61 of the feed motor 31, preventing the encoder holder 55 from being displaced further in the -Z direction.

[0046] In this way, when the encoder holder 55 is subjected to impact or vibration, the position of the encoder holder 55 is regulated by the feed motor 31 or the regulating frame 99, and therefore the position of the encoder 53 supported by the encoder holder 55 is also regulated. Therefore, when the encoder holder 55 is subjected to impact or vibration, it is possible to prevent the encoder 53 from hitting the scale 51 and damaging the scale 51.

[0047] [Other variations] 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 spirit of the present invention. For example, the above-described embodiment can be modified as follows in addition to the above. Also, the embodiment and the modified examples may be combined to form a configuration.

[0048] The encoder 53 is not limited to being attached to the surface of the second plate portion 75 facing the second direction Db, but may be attached to any location on the second plate portion 75. For example, the encoder 53 may be attached to the surface of the second plate portion 75 facing the first direction Da.

[0049] The restricting portion that restricts the position of the encoder holder 55 is not limited to the feed motor 31 or the restricting frame 99, and may be any part around the encoder holder 55. In addition, the portion that comes into contact with the restricting portion is not limited to the second plate portion 75 or the holder protrusion portion 95 of the encoder holder 55, and may be any part of the encoder holder 55. As described above, the encoder holder 55 is supported by the first main body frame 41 at the first plate portion 73 in a cantilever manner. For this reason, it is preferable that the portion that comes into contact with the restricting portion is provided at a position where the distance from the first plate portion 73 is equal to or greater than the distance from the first plate portion 73 to the second plate portion 75, and this makes it possible to reduce the amount of displacement of the encoder 53.

[0050] [Note] The printing device will be described below. The printing device comprises a motor having a first surface facing a first direction, a second surface facing a second direction opposite to the first direction, and a shaft portion protruding from the second surface in the second direction, a scale fixed to the shaft portion so as to be rotatable integrally with the shaft portion, a motor support member connected to the first surface and supporting the motor, an encoder detecting rotation of the scale, and an encoder holder supporting the encoder, the encoder holder having a first plate portion connected to the motor support member, a second plate portion spaced apart in the second direction from the second surface, and a third plate portion connecting the first plate portion and the second plate portion, and the encoder is attached to the second plate portion.

[0051] According to this configuration, the position of the encoder relative to the motor support member in the thickness direction of the scale can be determined by the dimension between the first plate portion and the second plate portion. Furthermore, since the second plate portion is spaced apart in the second direction from the second surface, heat generated by the motor is prevented from being transferred from the second surface of the motor to the second plate portion of the encoder holder. Therefore, the positional accuracy of the encoder relative to the motor support member in the thickness direction of the scale can be improved, and deformation of the encoder holder due to heat generated by the motor can be prevented.

[0052] In this case, it is preferable to provide a regulating portion that is provided with a gap between the encoder holder and the encoder holder and that regulates the position of the encoder holder by coming into contact with the encoder holder when vibration is applied to the encoder holder.

[0053] According to this configuration, when the encoder holder is subjected to an impact or vibration, it is possible to prevent the encoder supported by the encoder holder from hitting the scale and damaging the scale. The feed motor 31 is an example of a "regulating portion." The regulating frame 99 is an example of a "regulating portion."

[0054] In this case, it is preferable that the motor functions as a regulating portion.

[0055] According to this configuration, the function as the drive source and the function of regulating the position of the encoder holder can be performed by a single component, the motor, and the number of components in the printing device 1 can be reduced.

[0056] In this case, it is preferable that the encoder holder has an encoder cover portion that is provided in the second direction relative to the second plate portion and covers the encoder.

[0057] According to this configuration, the single part of the encoder holder can function both to hold the encoder and to prevent foreign matter such as water and paper dust from entering the encoder, thereby reducing the number of parts in the printing device.

[0058] In this case, it is preferable that the encoder holder has a wiring holding portion that holds the wiring.

[0059] According to this configuration, the function of holding the encoder and the function of holding the wiring can be performed by a single part, the encoder holder, and the number of parts of the printing device 1 can be reduced. [Explanation of symbols]

[0060] 1...printing device, 31...feed motor, 41...first main body frame, 51...scale, 53...encoder, 55...encoder holder, 57...first surface, 59...second surface, 63...shaft portion, 73...first plate portion, 75...second plate portion, 77...third plate portion, 79...encoder cover portion, 83...wiring holding portion, 99...regulating frame, Da...first direction, Db...second direction.

Claims

1. a motor having a first surface facing a first direction, a second surface facing a second direction opposite to the first direction, and a shaft portion protruding from the second surface in the second direction; a scale fixed to the shaft portion so as to be rotatable integrally with the shaft portion; a motor support member connected to the first surface and supporting the motor; an encoder for detecting rotation of the scale; An encoder holder that supports the encoder, The encoder holder includes: A first plate portion connected to the motor support member; a second plate portion provided at a distance from the second surface in the second direction; A third plate portion connecting the first plate portion and the second plate portion, A printing device characterized in that the encoder is attached to the first direction surface of the second plate portion or the second direction surface of the second plate portion.

2. 2. A printing device as described in claim 1, further comprising a regulating portion provided with a gap between the encoder holder and the encoder holder, and regulating the position of the encoder holder by contacting the encoder holder when vibration is applied to the encoder holder.

3. The printing apparatus according to claim 2 , wherein the motor functions as the regulating portion.

4. 4. The printing device according to claim 1, wherein the encoder holder has an encoder cover portion that is provided in the second direction with respect to the second plate portion and that covers the encoder.

5. 5. The printing device according to claim 1, wherein the encoder holder has a wiring holding portion that holds wiring.

Images