JP6543097B2 - Printing device - Google Patents

Description

  The present invention relates to a printing apparatus.

  Patent Document 1 (Japanese Patent Laid-Open No. 2014-180769) discloses an example of a printing apparatus provided with a platen roller and a thermal head. During the operation of the printing apparatus of this type, the printing object alone or the laminate of the printing object and the ink ribbon is pressed by a thermal head against the platen roller with a predetermined pressing force.

  The optimum pressing force of the thermal head on the print target depends on the material and thickness of the print target. Therefore, when the thermal head moving mechanism of the printing apparatus allows only two postures, the printing state and the standby state, to the thermal head, it is difficult to optimize the pressing force.

  In addition, when the number of possible postures of the thermal head is only two, maintenance of the printing apparatus is difficult to perform.

  An object of the present invention is to provide various conveniences such as optimization of pressure and maintenance workability in a printing apparatus.

  A printing apparatus according to a first aspect of the present invention includes a head unit, a platen roller, and a drive unit. The head unit includes a thermal head for printing on an object to be printed. The platen roller faces the thermal head across the print target. The drive has a position reference. The drive unit changes the attitude of the head unit by moving the position reference unit. The drive unit switches the first state, the second state, and the third state. In the first state, the position of the position reference portion is the first position. In the second state, the position of the position reference portion is the second position. In the third state, the position of the position reference portion is the third position.

  According to this configuration, the head unit can take at least three states. As a result, convenience such as optimization of the pressing force of the thermal head and improvement of maintenance workability can be achieved.

  A printing apparatus according to a second aspect of the present invention is the printing apparatus according to the first aspect, wherein the drive unit includes a motor and a swing arm. The motor has a motor shaft. The pivoting arm pivots as the motor shaft rotates. The position reference portion is the tip of the pivoting arm.

  According to this configuration, the attitude of the head unit is changed by the motor. Therefore, the attitude of the head unit and the pressing force of the thermal head can be changed continuously.

  A printing apparatus according to a third aspect of the present invention is the printing apparatus according to the second aspect, wherein the motor is a stepping motor. The third position can be adjusted by the number of pulses applied to the stepping motor.

  According to this configuration, the posture change of the thermal head is performed by the stepping motor. Therefore, the adjustment of the pressing force of the thermal head is easily performed by changing the number of pulses.

  A printing apparatus according to a fourth aspect of the present invention is the printing apparatus according to any one of the first aspect through the third aspect, wherein the head unit includes a first movable portion, a second movable portion, and an elastically deformable body. And. The first movable portion has a thermal head. The second movable unit moves by receiving a force from the drive unit. The elastically deformable body exerts a force to separate the first movable portion and the second movable portion from each other.

  According to this configuration, the elastically deformable body acts to separate the first movable portion and the second movable portion from each other. Therefore, by moving the second movable portion, it is possible to change the pressing force that the thermal head exerts on the platen roller.

  A printing apparatus according to a fifth aspect of the present invention is the printing apparatus according to the fourth aspect, further comprising a pivot shaft supporting the head unit. The first movable portion and the second movable portion pivot about the pivot shaft.

  According to this configuration, the first movable portion and the second movable portion are supported by the pivot shaft. Therefore, the operation of the head unit tends to be stable.

  The printing device according to a sixth aspect of the present invention is the printing device according to the fourth aspect or the fifth aspect, wherein the distance between the second movable portion and the platen roller is larger in the first state than in the second state. The distance between the second movable portion and the platen roller is larger in the second state than in the third state. In the first state and the second state, the thermal head is separated from the platen roller. In the third state, the thermal head contacts the platen roller and is pressed against the platen roller by the pressing force of the elastic deformation body.

  According to this configuration, the thermal head is largely separated from the platen roller in the first state. Therefore, the convenience of the operator can be achieved by taking the first state at the time of maintenance.

  The printing device according to a seventh aspect of the present invention is the printing device according to the fourth aspect or the fifth aspect, wherein the distance between the second movable portion and the platen roller is larger in the first state than in the second state. The distance between the second movable portion and the platen roller is larger in the second state than in the third state. In the first state, the thermal head is separated from the platen roller. In the second state, the thermal head contacts the platen roller and is pressed against the platen roller by a predetermined pressing force by the elastic deformation body. In the third state, the thermal head contacts the platen roller and is pressed against the platen roller with a pressing force larger than a predetermined pressing force.

  According to this configuration, the thermal head is pressed against the platen roller with a small pressing force in the second state, and pressed with a large pressing force in the third state. Therefore, the magnitude of the pressing force can be switched according to the printing conditions.

  The printing device according to an eighth aspect of the present invention is the printing device according to the second aspect or the third aspect, wherein the head unit further has a first movable portion. The first movable portion has a thermal head. The drive unit further includes an elastic deformation body. An elastically deformable body is provided on the pivoting arm to exert a force on the first movable part. The distance between the position reference portion and the platen roller is larger in the first state than in the second state. The distance between the position reference portion and the platen roller is larger in the second state than in the third state.

  According to this configuration, the first movable portion moves by the elastic deformable body pushing the first movable portion. Therefore, the pressing force that the thermal head exerts on the platen roller can be changed by the movement of the first movable portion and the deformation of the elastically deformable body.

A printing device according to a ninth aspect of the present invention is the printing device according to any one of the fourth aspect through the eighth aspect, wherein the first movable portion is a base member, an adjusting screw, a head holding member, It has an adjustment spring and an adjustment nut. The base material is formed with an adjusting screw rod hole. The adjusting screw is inserted into the adjusting screw hole. The head holding member is fixed to the adjusting screw rod and holds the thermal head. The adjustment spring is provided on the adjustment screw rod and exerts a force to separate the base material and the head holding material. The adjusting nut is screwed on the adjusting screw rod. The rotation of the adjustment nut adjusts the position of the thermal head,
According to this configuration, the position of the thermal head can be finely adjusted by rotating the adjusting nut.

  A printing apparatus according to a tenth aspect of the present invention is the printing apparatus according to any one of the first to ninth aspects, further including a print setting storage unit. The print setting storage unit stores a value associated with the third position according to the type of print object.

  According to this configuration, the printing apparatus has the print setting storage unit. Therefore, the value related to the pressing force optimized in accordance with the type of print object can be called from the print setting storage unit.

  A printing apparatus according to an eleventh aspect of the present invention is the printing apparatus according to any one of the first to tenth aspects, further comprising an attaching section. The sticking unit is for sticking a print target to another article.

  According to this configuration, the printing apparatus has the sticking section. Therefore, the printed label can be attached to the article.

  According to the printing apparatus according to the first aspect of the present invention, convenience such as optimization of pressing force of the thermal head and improvement of maintenance workability can be achieved.

  According to the printing apparatus according to the second aspect of the present invention, the attitude of the head unit and the pressing force of the thermal head can be changed continuously.

  According to the printing apparatus in the third aspect of the present invention, the pressing force of the thermal head can be easily adjusted.

  According to the printing apparatus according to the fourth and eighth aspects of the present invention, the pressing force of the thermal head can be easily adjusted.

  In the printing apparatus according to the fifth aspect of the present invention, the operation of the head unit can be easily stabilized.

  According to the printing apparatus in the sixth aspect of the present invention, the convenience of the operator can be improved.

  According to the printing apparatus in the seventh aspect of the present invention, the magnitude of the pressing force can be switched according to the printing condition.

  According to the printing apparatus in accordance with the ninth aspect of the present invention, the position of the thermal head can be finely adjusted.

  The printing apparatus according to the tenth aspect of the present invention facilitates optimization of the settings.

  According to the printing apparatus in accordance with the eleventh aspect of the present invention, the printed label can be attached to the article.

FIG. 1 is a schematic view of a printing apparatus 100 according to a first embodiment of the present invention. FIG. 1 is a block diagram of a printing apparatus 100 according to a first embodiment of the present invention. FIG. 2 is a schematic view showing a retracted posture PR of a head unit 40 mounted on the printing apparatus 100 according to the first embodiment of the present invention. FIG. 8 is a schematic view showing a standby attitude PS of the head unit 40. FIG. 10 is a schematic view showing a weakly pressed posture PPW of a head unit 40. FIG. 10 is a schematic view showing a strong pressing posture PPS of the head unit 40. FIG. 10 is a schematic view showing a magnet 66 in a retracted position PR of the head unit 40. FIG. 7 is a diagram showing the position of a position reference point 32a in each posture. FIG. 10 is a schematic view showing a retraction attitude PR of a head unit 40A mounted on a printing apparatus 100 according to a second embodiment of the present invention. FIG. 7 is a schematic view showing a standby attitude PS of the head unit 40A. Schematic diagram showing the weak pressing posture PPW of the head unit 40A FIG. 10 is a schematic view showing a strong pressing posture PPS of the head unit 40A. FIG. 7 is a diagram showing the position of a position reference point 32a in each posture.

First Embodiment
(1) Overall Configuration FIG. 1 is a schematic view of a printing apparatus 100 according to a first embodiment of the present invention. The printing apparatus 100 is for printing a label S by printing on the printing object S using the ink ribbon R, and attaching the label L to the article A.

  FIG. 2 shows a block diagram of the printing apparatus 100. As shown in FIG. The printing apparatus 100 includes a frame unit 10, a printing unit 20, a sticking unit 80, a print object transport unit 81, an article transport unit 82, a control unit 90, and a print setting storage unit 91.

(2) Detailed configuration (2-1) Frame unit 10
The frame unit 10 is a basic structure for supporting various mechanisms. The frame portion 10 has a basic frame 11 shown in FIG. 3, a pivot shaft 12, a platen roller shaft 13, and a platen roller 14. The pivot shaft 12 and the platen roller shaft 13 are rotatably attached to the basic frame 11. The platen roller 14 is rotatable with the platen roller shaft 13.

  Furthermore, as shown in FIG. 7, the frame unit 10 has a magnetic body holding portion 15 and a magnetic body 16. The magnetic material holding portion 15 is attached to the basic frame 11. The magnetic body 16 is fixed to the magnetic body holding portion 15.

(2-2) Printing unit 20
As shown in FIG. 3, the printing unit 20 has a head unit 40 and a drive unit 30.

(2-2-1) Head unit 40
3 to 6 each show the structure of the printing unit 20. FIG. In each drawing, the attitude of the head unit 40 is different. The postures of FIG. 3, FIG. 4, FIG. 5 and FIG. 6 will be referred to as retracted posture PR, standby posture PS, weakly pressed posture PPW, and strongly pressed posture PPS, respectively.

  As shown in FIG. 3, the head unit 40 has a first movable portion 50, a second movable portion 60, and an elastically deformable body 70.

(2-2-1-1) First movable portion 50
The first movable portion 50 can pivot about the pivot shaft 12. The main elements constituting the first movable portion 50 are a base material 51, a head holding material 52, and a thermal head 53. In the base member 51, a first hole 51a for passing the pivot shaft 12 is formed. The head holding member 52 is fixed to the base member 51. The thermal head 53 performs printing by thermally transferring the ink applied to the ink ribbon R onto the printing object S, and is fixed to the head holding member 52.

  Furthermore, the first movable portion 50 is provided with an adjustment mechanism 54 for adjusting the position of the thermal head 53. The adjusting mechanism 54 includes an adjusting screw rod 55 passed through the second hole 51 b of the base member 51, an adjusting spring 56 provided so as to surround the adjusting screw rod 55, and a welding fixing screwed and welded to the adjusting screw rod 55. A nut 57 and an adjusting nut 58 screwed with the adjusting screw rod 55 on the opposite side of the welding fixing nut 57 are formed. The adjustment spring 56 applies a force to both the base member 51 and the head holding member 52 to separate them from each other. By rotating the adjustment nut 58, the distance between the base member 51 and the head holding member 52 is changed, whereby the position of the thermal head 53 is adjusted.

(2-2-1-2) Second movable portion 60
The second movable part 60 can also pivot about the pivot shaft 12. The second movable portion 60 includes a pressure generating plate 61, a supported plate 62 extending vertically downward from one end of the pressure generating plate 61, a link member 63 attached to the pressure generating plate 61, and a second movable portion 60 A restricting portion 64 is provided to restrict the distance from the first movable portion 50 or the angular difference. The supported plate 62 is disposed to make a plane perpendicular to the axial direction of the pivot shaft 12 and has a plate hole 62 a for passing the pivot shaft 12.

  Furthermore, the second movable portion 60 has a magnet holding portion 65 and a magnet 66 described later with reference to FIG.

(2-2-1-3) Elastic deformation body 70
Returning to FIG. 3, the elastically deformable body 70 is for applying a force to both the first movable portion 50 and the second movable portion 60 so as to be separated from each other. The elastically deformable body 70 is a coil spring.

(2-2-2) Drive unit 30
The drive unit 30 is a power source for changing the attitude of the head unit 40. The drive unit 30 includes an actuator 31, a pivot arm 32, and a contact unit 33.

  The actuator 31 is a rotary stepping motor and rotates the actuator shaft 31a. The pivoting arm 32 pivots by rotation of the actuator shaft 31a. The tip of the swing arm 32 constitutes a position reference portion 32a. The contact portion 33 is for applying a force to the second movable portion 60, and is in contact with the link member 63.

(2-3) Sticking unit 80
Returning to FIG. 1, the sticking unit 80 is a mechanism for producing a label L from the printed printing object S and sticking the label L to the article A.

(2-4) Print object transport section 81
The printing object transport unit 81 transports the printing object S and passes the printing unit 20 and the sticking unit 80.

(2-5) Article Conveying Section 82
The article transport unit 82 transports the article A.

(2-6) Control unit 90
As shown in FIG. 2, the control unit 90 controls the head unit 40, the drive unit 30, the sticking unit 80, the print object transport unit 81, and the article transport unit 82.

(2-7) Print setting storage unit 91
The print setting storage unit 91 stores various settings in the print operation. The setting items include, for example, items such as the pressing force of the thermal head 53 optimized for each type of printing object S or each type of article A.

(3) Basic Operation As shown in FIG. 1, the article transport unit 82 transports the article A in the arrow direction.

  The printing object transport unit 81 transports the printing object S, whereby the printing object S reaches the printing unit 20 and then the sticking unit 80. The ink ribbon R is also transported in accordance with the transport speed of the print object S.

  The print target S is printed with predetermined information by the print unit 20, and then formed into the form of a label L by a known method. The sticking unit 80 sticks the label L to the article A.

(4) Posture Change Operation As shown in FIGS. 3 to 6, the head unit 40 can change its posture. The change of posture is performed by the actuator 31 pivoting the pivoting arm 32 in either direction. As the pivoting arm 32 pivots, the position of the position reference portion 32 a changes, and the contact portion 33 pushes down or pulls up the second movable portion 60. Adjustment of the turning angle is performed by adjusting the number of pulses transmitted to the actuator 31, which is a rotary stepping motor.

(4-1) Retraction attitude PR
In the retracted posture PR shown in FIG. 3, the thermal head 53 is largely separated from the platen roller 14.

  The retraction posture PR is used when the printing apparatus 100 is not performing the printing operation. This includes, for example, replacement of the print target S or the ink ribbon R, and maintenance work of the head unit 40 and other portions.

  When the printing apparatus 100 is powered on, the actuator 31 generates a torque for lifting the head unit 40, thereby realizing the retraction posture PR. On the other hand, when the power supply of the printing apparatus 100 is shut off, as shown in FIG. 7, the user brings the magnet 66 of the second movable unit 60 into contact with the magnetic body 16 of the frame unit 10. Can be held magnetically, thereby maintaining the retraction posture PR. In FIG. 7, the link member 63 is omitted.

(4-2) Standby attitude PS
In the standby attitude PS shown in FIG. 4, the thermal head 53 is slightly separated from the platen roller 14. When transitioning from the retraction attitude PR described above to the standby attitude PS, the actuator 31 causes the pivoting arm 32 to pivot counterclockwise.

(4-3) Weakly pressed posture PPW
In the weak pressing posture PPW illustrated in FIG. 5, the thermal head 53 presses the ink ribbon R and the print target S against the platen roller 14 with a weak pressing force. When transitioning from the above-described standby posture PS to this weakly-pressed posture PPW, the actuator 31 slightly pivots the pivot arm 32 counterclockwise.

(4-4) Strong pressing attitude PPS
In the strong pressing posture PPS shown in FIG. 6, the thermal head 53 presses the ink ribbon R and the print target S against the platen roller 14 with a strong pressing force. When transitioning from the above-described weakly-pressed posture PPW to this strongly-pressed posture PPS, the actuator 31 slightly pivots the swing arm 32 counterclockwise.

  In the strong pressing posture PPS, the distance or the angle difference between the first movable portion 50 and the second movable portion 60 is narrower than those in the weak pressing posture PPW. Furthermore, the elastically deformable body 70 is further shrunk as compared with the state of the weakly pressed posture PPW.

(4-5) Movement of Position Reference Unit 32a FIG. 8 shows the position of the position reference unit 32a in each posture. The point P1 is the position of the position reference portion 32a in the retracted posture PR. The point P2 is the position of the position reference unit 32a in the standby attitude PS. The point P3 is the position of the position reference portion 32a in the weakly pressed posture PPW. The point P4 is the position of the position reference portion 32a in the strong pressing posture PPS. The point P1, the point P2, the point P3 and the point P4 are arranged in this order along the arc-shaped locus in a counterclockwise direction.

(4-6) Setting Call In the print setting storage unit 91, a value related to the optimized pressing force is input in advance in accordance with the type of the printing object S or the type of the article A. The value related to the pressing force is, for example, the number of pulses for realizing the rotation angle of the corresponding position reference unit 32a. The user can call the pressing force setting from the print setting storage unit 91 according to the type of the print object S or the article A to be input to the printing apparatus 100. This process may be performed automatically in combination with any type detection means.

(5) Characteristics (5-1)
The head unit 40 can take at least three states. As a result, convenience such as optimization of the pressing force of the thermal head 53 and improvement of maintenance workability can be achieved.

(5-2)
The attitude of the head unit 40 is changed by the actuator 31. Therefore, the attitude of the head unit 40 and the pressing force of the thermal head 53 can be changed continuously.

(5-3)
The actuator 31 for changing the posture of the thermal head 53 is a rotary stepping motor. Therefore, the adjustment of the pressing force of the thermal head 53 is easily performed by changing the number of pulses.

(5-4)
The elastically deformable body 70 acts to separate the first movable portion 50 and the second movable portion 60 from each other. Therefore, by moving the second movable portion 60, the pressing force that the thermal head 53 exerts on the platen roller 14 can be changed.

(5-5)
The first movable portion 50 and the second movable portion 60 are supported by the pivot shaft 12. Therefore, the operation of the head unit 40 tends to be stable.

(5-6)
The thermal head 53 is largely separated from the platen roller 14 in the state of the retracted posture PR. Therefore, the convenience of the operator can be achieved by taking the retreating posture PR at the time of maintenance.

(5-7)
The thermal head 53 is pressed against the platen roller 14 with a small pressing force in the weak pressing posture PPW state and is pressed with a large pressing force in the strong pressing posture PPS state. Therefore, the magnitude of the pressing force can be switched according to the printing conditions.

(5-8)
By rotating the adjustment nut 58, the position of the thermal head 53 can be finely adjusted.

(5-9)
The printing apparatus 100 has a print setting storage unit 91. Therefore, the value related to the pressing force optimized in accordance with the type of the print target S can be called from the print setting storage unit 91.

(5-10)
According to this configuration, the printing apparatus 100 includes the sticking unit 80. Therefore, the printed label L can be attached to the article A.

(6) Modification (6-1) Elastic deformation body 70
In the first embodiment described above, the elastically deformable body 70 is a coil spring. Alternatively, the elastically deformable body 70 may be another material that elastically deforms, such as a leaf spring or rubber.

(6-2) Actuator 31
In the first embodiment described above, the actuator 31 is a rotary stepping motor. Alternatively, the actuator 31 may be a rotary servo motor, a linear motor, or another actuator such as a hydraulic cylinder.

  The actuator 31 may be provided with an encoder capable of detecting the position of the position reference unit 32a. The value related to the pressing force stored in the print setting storage unit 91 may be determined in association with this encoder.

(6-3) Thermal head 53
In the first embodiment described above, the thermal head 53 is of the thermal transfer type that requires the ink ribbon R. Alternatively, the thermal head 53 may be a thermal direct thermal head which does not require the ink ribbon R.

Second Embodiment
(1) Overall Configuration FIG. 9 shows a printing unit 20 mounted on a printing apparatus 100 according to a second embodiment of the present invention. The head unit 40A according to the present embodiment is different from the head unit 40 according to the first embodiment in that the second movable portion 60 and the elastically deformable body 70 are not provided. In addition, the drive unit 30A according to the present embodiment is different from the drive unit 30 according to the first embodiment in that the elastically deformable body 34 is provided. The elastic deformation body 34 is a rubber roller.

(2) Posture Change Operation As shown in FIGS. 9 to 12, the head unit 40A can change the posture. The change of posture is performed by the actuator 31 pivoting the pivoting arm 32 in either direction. As the pivoting arm 32 pivots, the position of the position reference portion 32 a changes, and the elastically deformable body 34 pushes down or pulls up the first movable portion 50. Adjustment of the turning angle is performed by adjusting the number of pulses transmitted to the actuator 31, which is a rotary stepping motor.

(2-1) Retraction attitude PR
In the retracted posture PR shown in FIG. 9, the thermal head 53 is largely separated from the platen roller 14.

(2-2) Standby posture PS
In the standby posture PS shown in FIG. 10, the thermal head 53 is slightly separated from the platen roller 14. When transitioning from the retraction attitude PR described above to the standby attitude PS, the actuator 31 causes the pivoting arm 32 to pivot counterclockwise.

(2-3) Weakly pressed posture PPW
In the weak pressing posture PPW shown in FIG. 11, the thermal head 53 presses the ink ribbon R and the print target S against the platen roller 14 with a weak pressing force. When transitioning from the above-described standby posture PS to this weakly-pressed posture PPW, the actuator 31 slightly pivots the pivot arm 32 counterclockwise. In the weakly pressed posture PPW, the shape of the elastically deformable body 34 is slightly deformed.

(2-4) Strong pressing attitude PPS
In the strong pressing posture PPS shown in FIG. 12, the thermal head 53 presses the ink ribbon R and the print target S against the platen roller 14 with a strong pressing force. When transitioning from the above-described weakly-pressed posture PPW to this strongly-pressed posture PPS, the actuator 31 slightly pivots the swing arm 32 counterclockwise. In the strong pressing posture PPS, the shape of the elastically deformable body 34 is deformed more than the state of the weak pressing posture PPW.

(2-5) Movement of Position Reference Unit 32a FIG. 13 shows the position of the position reference unit 32a in each posture. The point P1 is the position of the position reference portion 32a in the retracted posture PR. The point P2 is the position of the position reference unit 32a in the standby attitude PS. The point P3 is the position of the position reference portion 32a in the weakly pressed posture PPW. The point P4 is the position of the position reference portion 32a in the strong pressing posture PPS. The point P1, the point P2, the point P3 and the point P4 are arranged in this order along the arc-shaped locus in a counterclockwise direction.

(3) Features When the elastically deformable body 34 pushes the first movable portion 50, the first movable portion 50 moves. Therefore, the pressing force that the thermal head 53 exerts on the platen roller 14 can be changed by the movement of the first movable portion 50 and the deformation of the elastically deformable body 34.

(4) Modifications (4-1) Modification of First Embodiment The modification described in the first embodiment may be applied to the present embodiment.

(4-2) Elastic deformation body 34
In the second embodiment described above, the elastically deformable body 34 is a rubber roller. Alternatively, the elastically deformable body 34 may be another elastically deformable member such as a coil spring or a leaf spring.

DESCRIPTION OF SYMBOLS 10 Frame part 11 Basic frame 12 Pivot shaft 13 Platen roller shaft 14 Platen roller 15 Magnetic material holding part 16 Magnetic body 20 Printing part 30, 30A Drive part 31 Actuator 31a Actuator shaft 32 Pivotal arm 32a Position reference part 33 Contact part 34 Elastic deformation Body 40, 40A Head unit 50 1st movable part 51 Base material 51a 1st hole (for turning shaft 12)
51b second hole (for adjustment screw bar 55)
52 head holding member 53 thermal head 54 adjustment mechanism 55 adjustment screw rod 56 adjustment spring 57 welding fixing nut 58 adjustment nut 60 second movable portion 61 pressure generation plate 62 supported plate 62 a plate hole (for the pivot shaft 12)
63 link member 64 limiting unit 65 magnet holding unit 66 magnet 70 elastic deformation body 80 pasting unit 90 control unit 91 printing setting storage unit 100 printing device PR retraction posture PS waiting posture PPW weak pressing posture PPS strong pressing posture R ink ribbon S printing target object

JP, 2014-180769, A

Claims (6)

And the thermal head to be printed on the print target,
A platen roller facing the thermal head with the print target interposed therebetween;
A driving unit configured to pivot the position reference unit to switch the thermal head between a position separated from the platen roller and a pressed position ;
Equipped with
The drive unit includes a motor that turns the position reference unit and holds the position reference unit at each position.
While de-energizing, in place of the motor, a magnet is provided for holding the thermal head at a retracted position spaced apart from the platen roller.
Printing device. The drive unit,
Swivel arm to pivot by the rotation of the previous SL motor,
Have
The position reference portion is a tip of the swing arm,
The printing apparatus according to claim 1. The motor is a stepping motor,
Wherein each position, adjust the number of pulses applied to the stepping motor,
The printing apparatus according to claim 2. The separated position includes a position where the thermal head is largely retracted from the platen roller and a standby position where the thermal head is slightly separated. The pressed position is a position where the thermal head is strongly pressed against the platen roller. There is a position to press weakly,
The printing apparatus according to any one of claims 1 to 3. A print setting storage unit that stores a value related to a pressing force when the thermal head presses the platen roller according to the type of the print object;
Further comprising
The printing apparatus according to any one of claims 1 to 4 . A sticking section for sticking the print object to another article,
The printing apparatus according to any one of claims 1 to 5 , further comprising:

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