JP5326431B2 - Printing apparatus and lid opening / closing detection method in printing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To accurately detect that an openable/closeable member is present at a position where it covers at least a part of a printing apparatus. <P>SOLUTION: The printing apparatus 10 includes a sensor 60 which includes first and second sensors 62 and 63 equipped in the lid body 30, a body magnet piece 71 set in a body 20, and a carriage magnet piece 70 set on a carriage 51. A control circuit 40 determines whether or not the lid body 30 is actually at a closing position on the basis of a detection signal from the first sensor 62 and a position condition of the carriage when it is detected by the second sensor 62 that the lid body 30 is present at the closing position. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a printing apparatus and a lid opening / closing detection method in the printing apparatus.

  A technique for detecting whether or not an openable / closable member such as a lid or a door is in a closed position is known. For example, in an inkjet printer in which the lid is opened and closed to replace the ink cartridge, the lid is not in the closed position to prevent interference with the carriage during printing, that is, when the carriage is activated (opened). Print processing is not executed. Therefore, it is desired to detect whether or not the lid is in the closed position, and a technique for detecting the open state of the cover in the ink jet printer has been proposed (for example, Patent Document 1).

JP 2006-264160 A

  However, in the conventional technique, it may be impossible to accurately detect whether or not the lid is in the closed position. That is, since the opening / closing of the lid is detected by using only one sensor, when a sensor misdetection occurs, for example, a movable body such as a carriage operates even though the lid is open. There was a problem. As described above, there is a demand for the movable body to be operated when the lid body is closed.

  These problems are not limited to printing apparatuses such as inkjet printers, but are common to apparatuses including a scanner that operates a carriage inside the apparatus and a movable unit that operates inside the apparatus.

  SUMMARY An advantage of some aspects of the invention is that it is possible to accurately detect that an openable / closable member is at a position covering at least a part of a printing apparatus. .

  In order to solve at least a part of the above problems, the present invention adopts the following various aspects.

  A first aspect provides a printing apparatus. A printing apparatus according to a first aspect includes a lid that can cover at least a part of the printing apparatus, a movable body that can move within the printing apparatus, and a lid that interlocks with the lid. Whether or not the lid covers at least a part of the printing apparatus based on the lid position detection unit that detects the position with respect to the printing apparatus, the position of the lid, and the position of the movable body. A determination unit for determining.

  According to the first aspect, based on the position of the lid and the position of the movable body, it is determined whether or not the lid covers at least a part of the printing apparatus. It is possible to accurately detect that the vehicle is in a position covering a part.

  The printing apparatus according to the first aspect further includes a movable body position detection unit that detects the position of the movable body, and the determination unit includes at least a part of the printing apparatus from the lid body position detection unit. Whether the lid is in a position covering at least a part of the printing apparatus based on the position of the movable body detected by the movable body position detection unit in response to the detection result that the cover body is in a position covering the printing apparatus. You may judge. In this case, since it is determined whether or not the lid body is at a position that covers at least a part of the printing apparatus based on the position of the movable body detected by the movable body position detection unit, the lid body is at least a part of the printing apparatus. It can be detected more accurately that it is in a position covering a part.

  In the printing apparatus according to the first aspect, a lid body position detection unit is provided at a position facing the lid body position detection unit, and a movable body detection unit is provided at a position facing the movable body position detection unit. May be provided. In this case, the position of the movable body can be detected based on the relative distance between the movable body detected portion and the movable body position detection portion.

  In the printing apparatus according to the first aspect, the detection of the position of the movable body by the movable body position detection unit is detection of whether or not the movable body is at a predetermined determination position, and the determination unit May determine whether or not the lid is in a position covering at least a part of the printing apparatus based on the movement position detected under the condition that the movable body is at the determination position. In this case, the position of the movable body that can be detected when the lid is in a position that actually covers at least a part of the printing apparatus, and the case where the lid is in a position that actually covers at least a part of the printing apparatus. Since the condition that the movable body is at the determination position is taken into consideration, it can be accurately determined whether or not the lid is at a position that covers at least a part of the printing apparatus.

  In the printing apparatus according to the first aspect, the determination position is a mechanical movement limit position of the movable body where the movable body moves when the lid body is at a position covering at least a part of the printing apparatus. In the case where the movable body is not detected at the determination position, the determination unit may determine that the lid body is not in a position covering at least a part of the printing apparatus. In this case, the mechanical movement limit position of the movable body that can be detected when the lid is actually in a position that covers at least a part of the printing apparatus, and the movable body is in the mechanical movement limit position. Since the conditions are taken into consideration, it can be accurately determined whether or not the lid is actually in a position covering at least a part of the printing apparatus.

  In the printing apparatus according to the first aspect, the movable body position detection unit outputs an affirmative signal when the movable body is at the movement limit position, and the determination unit is positive from the movable body position detection unit. When the signal is not received, it may be determined that the movable body is not detected at the movement limit position. In this case, based on the signal from the movable body position detection unit, it can be determined whether or not the lid is in a position covering at least a part of the printing apparatus.

  In the printing apparatus according to the first aspect, the determination position is a reference that serves as a reference for fluctuation of the movable body, where the movable body fluctuates when the lid is in a position that covers at least a part of the printing apparatus. If the movable body is not detected at the determination position, the determination unit may determine that the lid is not in a position that covers at least a part of the printing apparatus. In this case, since the reference position that is a reference for the movement of the movable body that can be detected when the lid is in a position that actually covers at least a part of the printing apparatus, and the condition that the movable body is at the reference position are considered. It is possible to accurately determine whether or not the lid is in a position covering at least a part of the printing apparatus.

  In the printing apparatus according to the first aspect, the movable body position detection unit outputs a negative signal when the movable body is at the reference position, and the determination unit receives a negative signal from the movable body position detection unit. May be determined that the movable body is not detected at the reference position. In this case, based on the signal from the movable body position detection unit, it can be determined whether or not the lid is in a position covering at least a part of the printing apparatus.

  In the printing apparatus according to the first aspect, when the movable body is detected at the determination position, the determination unit determines that the lid body is at a position covering at least a part of the printing apparatus. Also good. In this case, based on the position of the movable body, it can be determined whether or not the lid body is in a position that covers at least a part of the printing apparatus.

  In the printing apparatus according to the first aspect, the movable body may be a printing mechanism that operates in accordance with execution of printing. In this case, a printing mechanism provided in the printing apparatus can be used.

  In the printing apparatus according to the first aspect, the printing mechanism may be a carriage. In this case, since a carriage having a large operation amount can be used in the printing mechanism, the determination accuracy can be improved.

  The printing apparatus according to the first aspect further includes a main body having an opening, and the lid covers the opening when the cover is at a position covering at least a part of the printing apparatus and rotates with respect to the main body. The shaft may be movably supported. In this case, it is possible to improve the determination system for determining whether or not the lid is actually at a position covering at least a part of the printing apparatus.

  In the printing apparatus according to the first aspect, the movable body position detection unit may be a magnetoresistive element sensor.

  In the printing apparatus according to the first aspect, the movable body position detector and the lid body position detector are magnetoresistive element sensors arranged on the same substrate, and the lid body position detector and the movable body cover. The detection unit may be a magnetic material. In this case, the determination accuracy can be improved by using the sensitivity of the magnetoresistive element sensor as the determination threshold value.

  A second aspect provides an open / close detection method for detecting the open / close of a lid in a printing apparatus. An open / close detection method according to a second aspect detects a position of the lid with respect to the printing apparatus, and detects a position of a movable body that is provided in the printing apparatus and moves in accordance with the operation of the printing apparatus. And determining whether or not the lid is in a position covering at least a part of the printing apparatus based on the position of the lid and the position of the movable body.

  According to the open / close detection method according to the second aspect of the present invention, as with the printing apparatus according to the first aspect, it is accurately determined that the lid is in a position covering at least a part of the printing apparatus. Can do.

  Hereinafter, a printing apparatus according to the present invention will be described based on examples with reference to the drawings.

A. Configuration of printing device:
With reference to FIGS. 1-3, schematic structure of a printing apparatus provided with the opening / closing detection apparatus which concerns on a present Example is demonstrated. FIG. 1 is an explanatory diagram illustrating an appearance of a printing apparatus including an open / close detection device according to the present embodiment. FIG. 2 is a schematic configuration diagram of a printing apparatus including an open / close detection device according to the present embodiment. FIG. 3 is a functional block diagram illustrating the internal configuration of the control circuit of the printing apparatus including the open / close detection device according to the present embodiment.

  The printing apparatus 10 includes a main body 20 as a first constituent member, a lid 30 as a second constituent member, a control circuit 40, and a printing mechanism 50. The lid body 30 is centered on the shaft 31 with respect to the main body 20, and an open position where a part of the lid body 30 (open side facing the shaft 31) is separated from the main body 20, and a closed position covering the main body 20. It can be opened and closed between. The printing apparatus 10 includes a paper support plate 12 that forms a tray for setting a print paper P that is a print medium, and a paper receiver 14 that receives (supports) the print paper P after printing. The printing apparatus 10 may be, for example, an ink jet printer having only a printing function, or may be a composite ink jet printer having a document reading apparatus (document reading function) for reading a document.

  A control circuit 40 and a printing mechanism 50 are provided in the main body 20. The printing mechanism 50 includes a main scanning feed mechanism, a sub-scan feed mechanism, and a print head drive mechanism. The control circuit 40 controls each of these mechanisms and executes various program functions for determining whether or not the lid 30 is closed.

  The printing mechanism 50 will be described with reference to FIG. The main scanning feed mechanism includes a carriage motor 52 that drives a carriage 51 that is a movable body, a slide shaft 54 that is laid in parallel with the axis of the platen 53 and slidably holds the carriage 51, and the carriage motor 52. A pulley 56 for extending an endless drive belt 55 and a position sensor (not shown) for detecting the origin position of the carriage 51 are provided. The main scanning feed mechanism reciprocates the carriage 51 in the axial direction (main scanning direction) of the platen 53 by the carriage motor 52. The movement amount of the carriage 51 is larger than that of the movable body in the other printing mechanism, and the fluctuation position changes greatly. Therefore, the change of the fluctuation position is easily detected accurately, which is suitable as the movable body.

  The carriage 51 is a movable body provided with one or more print heads (not shown) on the surface facing the printing paper P. A print head is provided for each ink type, and each print head is provided with a plurality of ink ejection nozzles. The carriage 51 in the present embodiment is provided with a carriage magnet piece 70 that functions as a detected piece of a sensor to be described later. For example, when the home position that is the movement reference position of the carriage 51 is specified at the time of initialization processing, the carriage 51 is applied to (or made to collide with) the contact plate in order to eliminate an error due to a gear backlash or the like. The carriage 51 moves to the home position when non-printing is performed. The carriage 51 is fixed by the home position lock 23 at the home position. The initialization process is executed on the condition that the lid 30 is in the closed position, that is, the second sensor 62 described later detects that the lid 30 is closed.

  The printing apparatus 10 used in this embodiment is a so-called off-carriage printing apparatus in which an ink cartridge as an ink supply source is not mounted on the carriage 51. Therefore, the ink cartridge is mounted on the holder 21 prepared in the main body 20 separately from the carriage 51. In the example shown in FIG. 2, four ink cartridges, for example, ink cartridges CA <b> 1 to CA <b> 4 that contain four color inks of black, yellow, magenta, and cyan are mounted on the holder 21 one by one. The print heads IH <b> 1 to IH <b> 4 and the ink cartridges CA <b> 1 to CA <b> 4 are communicated by four ink supply tubes 22, and the ink in the ink cartridges CA <b> 1 to CA <b> 4 is supplied to the print head via the supply tube 22. In the printing apparatus 10 according to the present embodiment, when the ink cartridge is attached to or removed from the holder 21, the lid 30 must be opened.

  The sub-scan feed mechanism includes a paper feed motor 57, a first paper feed roller 58a, and a second paper feed roller 58b. The sub-scan feed mechanism conveys the printing paper P in the sub-scanning direction by transmitting the rotation of the paper feed motor 57 to each of the paper feed rollers 58a and 58b via the gear train.

  The head drive mechanism drives the print head mounted on the carriage 51 to control the ink discharge amount and timing to form a desired dot pattern on the print paper P. As the ink drive mechanism, for example, a drive mechanism that uses deformation of a piezo element that generates distortion by applying a voltage, or a drive mechanism that uses bubbles generated in ink using a heater that generates heat by applying a voltage is used. .

  A sensor system for detecting opening and closing of the lid 30 will be described. In the present embodiment, the lid 30 is provided with a sensor unit 60. The sensor unit 60 includes two sensors 62 and 63, and the first sensor 62 and the second sensor 63 are, for example, giant magnetoresistive element sensors (GMR sensors). As described above, the carriage 51 is provided with the carriage magnet piece 70 as a detected piece that is a detection target of the first sensor 62. The main body 20 is provided with a main body magnet piece 71 as a detected piece to be detected by the second sensor 63 at a position facing the second sensor 63 when the lid 30 is closed. The first sensor 62 is a position detection sensor (movable body position detector) that detects the position of the carriage 51 as a movable body, and the second sensor 63 is whether or not the lid body 30 is in a closed position that covers the main body 20. It functions as an open / close detection sensor (lid body position detection unit) for detection. The open / close detection sensor may detect the position of the lid 30 with respect to the printing apparatus 10 (main body 20). That is, it may be detected whether or not the lid 30 is in a position covering at least a part of the printing apparatus 10. The shape of the lid 30 may take various shapes depending on the shape of the printing apparatus 10 or in design, and the lid 30 is simply in a position covering at least a part of the printing apparatus 10. In addition, it can be said that the lid 30 is in the closed position.

  The control circuit 40 is connected to the carriage motor 52, the paper feed motor 57, and the first and second sensors 62, 63 via signal lines. The control circuit 40 drives the carriage motor 52, the paper feed motor 57, and the print head according to instructions from a connected personal computer, an operation panel (not shown), or according to various programs stored in the control circuit 40. The control circuit 40 also includes an external input / output terminal, and may be connected to an external device such as a computer or a digital still camera via the external input / output terminal, or an external storage device including a memory card slot. May be connected.

  As shown in FIG. 3, the control circuit 40 includes a central processing unit (CPU) 41, a memory 42, an input / output interface 43, and an internal bus signal line 44. The CPU 41, the memory 42, and the input / output interface 43 are connected to each other via an internal bus signal line 44 so that bidirectional communication is possible.

  The CPU 41 executes various programs stored in the memory 42 and controls the operation of the printing apparatus. For example, a control signal is transmitted to the carriage motor 52 to control the reciprocating operation of the carriage 51, and the print head is controlled to control the formation of ink dots on the printing paper P to execute the printing process. In addition to this, the CPU 41 performs an application process of the carriage 51 when the printing apparatus 10 is started up, a home position lock process for fixing the carriage 51 at the home position, and the like via a carriage motor 52 and other driving sources. .

  The memory 42 stores a carriage position condition 421 and a lid opening / closing determination module 422. The memory 42 may be a semiconductor storage element including a RAM and a ROM, or may be a hard disk device. In this embodiment, the memory 42 is used as a general term for a nonvolatile storage device for storing the various programs and a volatile storage device for executing the various programs.

  The carriage position condition 421 is a condition that the carriage 51 exists at a predetermined position, and can also be referred to as a movement position (existing position) at each operation timing of the printing apparatus 10. Alternatively, it can also be said to be a condition that defines the timing for starting the process executed by the lid opening / closing determination module 422 in order to determine whether or not the lid 30 is in the closed position. The predetermined position includes a contact position of the carriage 51 and a home position. That is, the carriage position condition 421 is a condition relating to the timing at which the carriage 51 is at the contact position and the timing at which the carriage 51 is at the home position.

  The lid opening / closing determination module 422 is a program executed by the CPU 41 to finally determine that the lid 30 is in the closed position. When the CPU 41 executes the lid opening / closing determination module 422, the control unit Realized. That is, when the second sensor 63 detects that the lid body 30 is in the closed position, the detection result of the second sensor 63 is determined based on the detection signal from the first sensor 62 (whether it is correct). This is a program for repeatedly determining whether or not. Based on the carriage position condition 421 and the detection signal from the first sensor 62, the CPU 41 determines whether or not the carriage 51 is present at a predetermined position, so that the lid 30 is brought into the closed position. It is finally determined whether or not there is. When the lid opening / closing determination module 422 is executed at the timing when the carriage 51 is at a predetermined position, the carriage position condition 421 may not be provided. For example, when the lid body opening / closing determination module 422 is executed at the timing when the carriage 51 is released from the home position lock during the carriage 51 application process executed on the condition that the lid body 30 is in the closed position. Since the position where the carriage 51 exists is associated with the execution timing of these processes, the carriage position condition 421 may not be stored in the memory 42. That is, in this case, it can be finally determined whether or not the lid 30 is in the closed position based on the detection position of the carriage 51.

  The input / output interface 43 connects the CPU 41 to the carriage motor 52, the paper feed motor 57, the first sensor 62, the second sensor 63, and the like.

Sensor configuration:
FIG. 4 is a schematic view of the first and second sensors in this embodiment as viewed from the front of the printing apparatus. FIG. 5 is a schematic view of the first and second sensors in this embodiment as viewed from the right side of the printing apparatus. FIG. 6 is an explanatory diagram schematically showing the relationship between the detected magnetic flux density of the GMR sensor and the distance.

  The first sensor 62 and the second sensor 63 are disposed on the same substrate 61. The substrate 61 is covered with a member constituting the lid 30, and in this embodiment, the substrate 61 whose periphery is covered with a member constituting the lid 30 is referred to as a sensor unit 60. When the lid 30 is in the closed position, the distance between the carriage magnet piece 70 mounted on the carriage 51 and the first sensor 62 is the distance shown in FIG. 4, and the main body magnet provided in the main body 20. The interval between the piece 71 and the second sensor 63 is the interval shown in FIG. The GMR sensor used in this embodiment has the relationship shown in FIG. 6 between the magnetic flux density to be detected and the distance from the magnet piece that is the detected piece, and the sensitivity of the GMR sensor is used as a threshold value. Thus, the distance (distance) between the GMR sensor and the detected piece can be accurately detected. In other words, when the distance between the GMR sensor and the detected piece is equal to or less than the distance corresponding to the determined sensitivity, a detection signal (low signal (active low)) is output from the GMR sensor, and the distance between the GMR sensor and the detected piece. If the distance is larger than the distance corresponding to the determined sensitivity, a non-detection signal (high signal) is output from the GMR sensor, and therefore the interval between the GMR sensor and the detected piece is determined based on the ON / OFF of the detection signal. can do. That is, whether the lid 30 is in the closed position by setting the sensitivity of the second sensor 63 to the distance between the second sensor 63 and the main body magnet piece 71 when the lid 30 is closed. Can be detected. Similarly, by setting the sensitivity of the first sensor 62 to the distance between the first sensor 62 and the carriage magnet piece 70 when the carriage 51 is in the contact position, the carriage 51 is in the contact position. It is possible to detect whether or not. The detection signal may be a high signal and the non-detection signal may be a low signal.

Positional relationship between sensor and carriage:
FIG. 7 is an explanatory diagram illustrating an example in which the carriage is in a movement position other than a predetermined position, as viewed from above the inside of the printing apparatus. FIG. 8 is an explanatory diagram showing an example in which the carriage is in the contact position when the inside of the printing apparatus is viewed from above. FIG. 9 is an explanatory diagram showing an example in which the carriage is at the home position when the inside of the printing apparatus is viewed from above.

  In FIG. 7, the carriage 51 moves along the sliding shaft 54 in the main scanning direction. The carriage 51 is fixed at the home position by the home position lock 23. The carriage 51 determines a physical position by physically colliding with the contact plate 501 in order to eliminate a position error due to a gear backlash or the like. The main body 20 is formed with a sensor portion accommodating portion 25 for receiving the sensor portion 60 of the lid 30, and a main body magnet piece 71 is disposed on a surface of the sensor portion accommodating portion 25 facing the second sensor 63. ing.

  The contact processing for the carriage 51 is executed as one of initial processing operations, for example, on condition that the lid 30 is in the closed position. Since the carriage 51 collides with the contact plate 501 during the contact process, the contact with the contact plate 501 is made at a certain timing as shown in FIG. When the carriage 51 moves to the position shown in FIG. 8, the distance between the first sensor 62 and the carriage magnet piece 70 becomes equal to or shorter than the distance at which the detection signal (low signal) is output from the first sensor 62. It is possible to detect that the carriage 51 is in the contact position every time it is a predetermined position via the signal.

  The carriage 51 is fixed by a home position lock at the home position shown in FIG. 9 at a timing other than when printing processing or other maintenance is performed. That is, in order to guarantee the origin position of the carriage 51, it is always locked at the home position during standby. When the carriage 51 is at the home position shown in FIG. 9, the distance between the first sensor 62 and the carriage magnet piece 70 is longer than the distance at which the detection signal (low signal) is output from the first sensor 62. The CPU 41 can detect that the carriage 51 is located at the home position which is a predetermined position through the input of a non-detection signal (high signal).

Positional relationship between sensor and lid:
FIG. 10 is an explanatory diagram showing an example in which the lid is in the open position. FIG. 11 is an explanatory diagram showing an example in which the lid is in the closed position. FIG. 12 is an explanatory diagram illustrating an example in which the lid body may be erroneously detected as being in the closed position. FIG. 13 is an explanatory diagram showing the relationship among the sensor unit, the carriage magnet piece, and the main body magnet piece when the lid shown in FIG. 11 is in the closed position. FIG. 14 is an explanatory diagram showing the relationship among the sensor unit, the carriage magnet piece, and the main body magnet piece when the lid is in a position erroneously detected as the closed position shown in FIG.

  As shown in FIG. 10, when the lid 30 is in the open position, the distance between the sensor unit 60 and the main body magnet piece 71 is a distance at which the second sensor 63 of the sensor unit 60 cannot detect the main body magnet piece 71. is there. On the other hand, as shown in FIG. 11, when the lid 30 is in the closed position, the distance between the sensor unit 60 and the main body magnet piece 71 is the distance that the second sensor 63 of the sensor unit 60 can detect the main body magnet piece 71. It is. That is, as shown in FIG. 13, the main magnet piece 71 covers the second sensor 63, and sufficient magnetic flux is supplied to the second sensor 63. When the carriage 51 is in the contact position, the distance between the carriage magnet piece 70 and the first sensor 62 is also a distance at which the first sensor 62 can detect the carriage magnet piece 70.

  On the other hand, in the example in which the lid 30 shown in FIG. 12 is erroneously detected as being in the closed position, a part of the sensor unit 60 overlaps with the main body magnet piece 71. That is, as shown in detail in FIG. 14, the second sensor 63 and the main body magnet piece 71 still overlap, and a sufficient magnetic flux is supplied to the second sensor 63. On the other hand, the first sensor 62 has a distance between the carriage magnet piece 70 and the first sensor 62 that can detect the carriage magnet piece 70 even if the carriage 51 is in the contact position. Therefore, it cannot be detected that the carriage 51 is in the contact position. The arrangement position of the sensor unit 60 is desirably a position as far as possible from the rotation axis, that is, a position close to the opening side of the lid 30. The closer to the opening side of the lid body 30, the more the false detection regarding the closed position of the lid body 30 can be prevented / reduced corresponding to the slight lift from the closed position.

  As described above, even if only the second sensor 63 that detects the opening / closing of the lid 30 is erroneously detected, the condition (timing) that the carriage 51 is in the contact position and the position of the carriage 51 are determined. By using the detection signal from the first sensor 62 to be detected, it is determined that the lid 30 is in the closed position, so that erroneous detection relating to the closed position of the lid 30 can be suppressed or prevented.

  Note that at the timing (condition) at which the carriage 51 is positioned at the home position, a non-detection signal should be output from the first sensor 62 in any of the cases shown in FIGS. That is, under this condition, the second sensor 63 detects that the lid 30 is in the closed position, the condition (timing) that the carriage 51 is in the home position, and the first sensor 62 that detects the position of the carriage 51. The non-detection signal determines that the lid 30 is in the closed position. Therefore, when a metal piece or the like is sandwiched between the contact plate 501 and the sensor unit accommodating portion 25 and the magnetic flux of the carriage magnet piece 70 reaches the first sensor 62, the detection from the first sensor 62 is performed. A signal is output, and an abnormality can be detected. As a result, damage or the like of the printing mechanism 50 caused by the metal piece mixed into the printing mechanism 50 can be suppressed or prevented in advance.

Lid opening / closing judgment process:
FIG. 15 is a flowchart showing a processing routine of lid opening / closing determination processing that is executed when the carriage is in the contact position. FIG. 16 is a flowchart showing a processing routine of lid opening / closing determination processing executed when the carriage is at the home position. FIG. 17 is a flowchart showing a processing routine of lid opening / closing determination processing executed based on the carriage position condition and the detection results of the first and second sensors.

  The lid opening / closing determination process is a process realized by the CPU 41 executing the lid opening / closing determination module 422. First, the lid opening / closing determination process executed when the carriage is in the contact position will be described with reference to FIG. Whether or not the carriage is in the condition (timing) in the position of contact can be determined by whether or not the application process is being executed. When the application process is started, the CPU 41 determines whether or not the lid body 30 is in the closed position via the second sensor 63 (step S100). Specifically, the CPU 41 determines whether or not the output signal of the second sensor 63 indicates that the lid 30 is in the closed position, or whether or not it is on in the present embodiment. When the CPU 41 determines that the output signal of the second sensor 63 is not on (is off) (step S100: No), this processing routine is terminated. When the CPU 41 determines that the output signal of the second sensor 63 is on (step S100: Yes), the CPU 41 acquires the output of the first sensor 62 (step S102), and the carriage 51 is at the contact position. It is determined whether or not (step S104). Specifically, the CPU 41 determines whether or not the output signal of the first sensor 62 indicates that the carriage 51 is in the contact position, and in this embodiment, whether or not it is on. When the carriage 51 is at the position shown in FIG. 8, the output signal is an on signal, and when the carriage 51 is at another position, the output signal is an off signal. If the CPU 41 determines that the output signal of the first sensor 62 is on (step S104: Yes), the CPU 41 determines that the lid 30 is in the closed position (step S106), and ends this processing routine. . On the other hand, when the CPU 41 determines that the output signal of the first sensor 62 is OFF (step S104: No), it determines that the lid 30 is not in the closed position (is in the open position) (step S108). This processing routine ends. If the lid 30 is in the closed position, the subsequent requested processing, for example, the printing process may be started and continued. If the lid 30 is not in the closed position, the display panel on the printing apparatus, What is necessary is just to alert | report to a user via the display window on a personal computer, and to suspend the subsequent requested | required process. With this correspondence, it is possible to avoid problems caused by the carriage 51 and the like operating in a state where the lid 30 is not in the closed position.

  That is, the lid opening / closing determination process shown in FIG. 15 is executed under the condition (timing) in which the carriage 51 can be detected at the contact position, that is, at least the condition where the carriage 51 passes the contact position. When the ON signal is output from the sensor 63 and the lid 30 is actually in the closed position, it can be detected by the first sensor 62 as shown in FIG. On the other hand, even when the ON signal is output from the second sensor 63, when the lid 30 is actually in a position erroneously detected as the closed position as shown in FIG. It cannot be detected by the sensor 62.

  Accordingly, it is possible to suppress or prevent a situation in which the lid body 30 is erroneously detected as being in the closed position even though the lid body 30 is lifted from the closed position (although not completely in the closed position). As a result, it is possible to suppress or prevent the execution of printing with the lid 30 open, and troubles caused by the carriage 51 operating with the lid 30 open, for example, foreign matter mixed in from the outside. It is possible to prevent the malfunction of the carriage 51 due to the above and the user's contact with the carriage 51 in operation.

  The probing process is a process that is executed with the second sensor 63 being on as a trigger. In the above example, in order to increase the accuracy with which the lid 30 is in the closed position, the second process 63 is performed again. It is determined whether the second sensor 63 is turned on. However, for example, when the application process is interrupted when the lid 30 is opened to the open position at the time of execution, the determination as to whether or not the second sensor 63 is on may be omitted.

  With reference to FIG. 16, the lid opening / closing determination process executed when the carriage is at the home position will be described. Whether or not the carriage is at the home position (timing) can be determined by whether or not the home position lock 23 is on (at the lock position). The CPU 41 releases the home position lock 23 before executing the printing process. Therefore, the CPU 41 executes this processing routine before releasing the home position lock 23 in order to move the carriage 51 from the home position. CPU41 determines whether the cover body 30 exists in a closed position via the 2nd sensor 63 (step S200). If the CPU 41 determines that the output signal of the second sensor 63 is not on (is off) (step S200: No), this processing routine is terminated. If the CPU 41 determines that the output signal of the second sensor 63 is on (step S200: Yes), the CPU 41 acquires the output of the first sensor 62 (step S202), and whether the carriage 51 is at the home position. It is determined whether or not (step S204). Specifically, the CPU 41 determines whether or not the output signal of the first sensor 62 indicates that the carriage 51 is at the home position, or whether or not it is OFF in this embodiment. That is, the first sensor 62 outputs an on signal when the carriage 51 is closer to the sensor unit 60 than the position shown in FIG. 8, and the output signal is an off signal when the carriage 51 is at the home position. Become. If the CPU 41 determines that the output signal of the first sensor 62 is off (step S204: Yes), it determines that the lid 30 is in the closed position (step S206), and ends this processing routine. To do. When the lid 30 is in the closed position, the subsequent requested process, for example, the printing process may be started and continued. On the other hand, if the CPU 41 determines that the output signal of the first sensor 62 is on (step S204: No), it determines that an abnormality has occurred in the position of the lid 30 (step S208). The processing routine ends. If the lid 30 is not in the closed position, the user may be notified through the display panel on the printing apparatus and the display window on the personal computer, and the subsequent requested processing may be suspended. With this correspondence, it is possible to avoid problems caused by the carriage 51 and the like operating in a state where the lid 30 is not in the closed position.

  That is, when the carriage 51 is at the home position, an ON signal is not output from the first sensor 62. Therefore, for example, a metal piece or the like is sandwiched between the carriage 51 or the contact plate 501 and the sensor unit accommodating portion 25, and an abnormality such as the magnetic flux of the carriage magnet piece 70 reaching the first sensor 62 is suspected. Is called. Therefore, if the CPU 41 determines that an abnormality has occurred, it can stop subsequent printing processing and prevent the occurrence of problems such as damage to the printing mechanism 50 due to the carriage 51 reciprocating.

  With reference to FIG. 17, the lid opening / closing determination process using the position condition of the carriage 51 and the output results of the first and second sensors 62 and 63 will be described. In this example, the lid opening / closing determination process is executed without using the application process and the home position lock release process as a trigger. That is, the lid opening / closing determination process is executed at the timing of the application process and the home position lock release process. CPU41 determines whether the cover body 30 exists in a closed position via the 2nd sensor 63 (step S300). If the CPU 41 determines that the output signal of the second sensor 63 is not OFF (ON) (step S300: No), this processing routine is terminated. If the CPU 41 determines that the output signal of the second sensor 63 is on (step S300: Yes), it determines whether or not the carriage position condition is a contact position (step S302). Specifically, it is determined whether or not it is time to execute the allocation process.

  When the CPU 41 determines that the carriage position condition is the contact position (step S302: Yes), the CPU 41 acquires the output of the first sensor 62 and determines whether the carriage 51 is at the contact position. (Step S304). If the CPU 41 determines that the output signal of the first sensor 62 is on (step S304: Yes), it determines that the lid 30 is in the closed position (step S305), and ends this processing routine. To do. On the other hand, when the CPU 41 determines that the output signal of the first sensor 62 is OFF (step S304: No), it determines that the lid 30 is not in the closed position (is in the open position) (step S306). ), This processing routine is terminated.

  When determining that the carriage position condition is not the contact position (step S302: No), the CPU 41 determines whether the carriage position condition is the home position (step S307). Specifically, it is determined whether or not it is time to release the home position lock 23. If the CPU 41 determines that the carriage position condition is the home position (step S307: Yes), it acquires the output of the first sensor 62 and determines whether the carriage 51 is at the home position (step S307). S308). If the CPU 41 determines that the output signal of the first sensor 62 is off (step S308: Yes), it determines that the lid 30 is in the closed position (step S305), and ends this processing routine. To do. On the other hand, if the CPU 41 determines that the output signal of the first sensor 62 is on (step S308: No), it determines that an abnormality has occurred in the position of the lid 30 (step S309), and The processing routine ends. Also in this aspect, the subsequent processing may be changed depending on whether the lid 30 is in the closed position or not, similarly to the case where the carriage 51 is in the contact position and home position described above.

  According to the opening / closing detection apparatus according to the first embodiment described above, that is, the printing apparatus 10, it is possible to improve the determination accuracy of whether or not the lid 30 is in a position covering at least a part of the printing apparatus 10. be able to. That is, in addition to the second sensor 63 that detects opening and closing of the lid 30, the position detection signal of the carriage 51 that can be obtained from the first sensor 62 when the lid 30 is actually in the closed position, and the carriage Thus, erroneous detection by the second sensor 63 can be reduced or prevented.

  That is, in this embodiment, the detection result that the lid 30 is in the closed position, the position detection result of the carriage 51 that can be obtained when the lid 30 is in the closed position, and the movement position where the carriage 51 should be present. This information is used to suppress or prevent erroneous detection related to the closed position of the lid 30. As a specific example, in the above embodiment, a determination example using the detection result that the lid 30 is in the closed position and the position detection result of the carriage 51 at the timing when the carriage 51 is in a predetermined position, the lid A plurality of examples of determination examples in which the detection result that the body 30 is in the closed position and the position detection result of the carriage 51 take into account the condition (timing) that the carriage 51 exists at a predetermined position are described.

  Further, in the above embodiment, since the GMR sensor is used as the first and second sensors 62 and 63, the detection variation of the sensor is reduced as compared with a mechanical sensor that detects by mechanical contact. be able to. That is, in the GMR sensor, the position detection accuracy of the detected piece can be improved by using the sensitivity of the sensor as a determination threshold value.

  The printing apparatus 10 may be referred to as an opening / closing detection apparatus, or the first and second sensors 62 and 63, the carriage magnet piece 70, the main body magnet piece 71 and the control circuit 40 provided in the printing apparatus are detected as opening / closing. You may call it a device. That is, the opening / closing detection device and the printing device 10 may be regarded as the same, or the opening / closing detection device may be interpreted as a separate device provided in the printing device 10.

・ Modification examples of magnet pieces:
FIG. 18 is an explanatory view showing a first modification of the magnet piece. FIG. 19 is an explanatory view showing a second modification of the magnet piece. In the above embodiment, a normal rectangular shape, that is, a rectangular magnet piece has been described. However, the magnetic flux passes through the sensor unit 60 according to the detection direction of the magnetic flux density in the GMR sensor so that the magnetic field lines pass linearly. You may improve the shape of a magnet piece so that it may do. In the example of FIG. 18, a magnetizable metal piece 92 such as L-shaped iron is added to a normal rectangular magnet 90a. More specifically, one end of the L-shaped metal piece 92 is arranged on the N pole and the S pole of the magnet 90 a, and the other end of the metal piece 92 is arranged along the magnetic flux density detection direction of the sensor 80. . As a result, it is possible to stabilize the magnetic flux density by increasing the number of effective magnetic force lines passing through the sensor 80 while using the magnet 90a having the normal shape, and the detection accuracy of the sensor 80 can be improved. Further, by using the metal piece 92 that is easy to shape without changing the shape of the magnet 90a that is not easy to shape, the degree of freedom in the arrangement position of the magnet 90a can be improved, and the magnet 90a can be arranged. The design of the internal structure of the main body can be facilitated.

  In the example of FIG. 19, the magnet 90 b is formed in a C shape, and the N pole and S pole of the magnet are opposed via the sensor 80. Also in this case, it is possible to stabilize the magnetic flux density by increasing the number of effective lines of magnetic force passing through the sensor 80, and the detection accuracy of the sensor 80 can be improved. In addition, since the U-shaped magnet 90b is used, the degree of freedom in the arrangement position of the magnet 90b can be improved without increasing the number of parts, and the internal structure of the main body on which the magnet 90b is arranged can be easily designed. Can be

Other examples:
(1) In the above embodiment, the carriage 51 is described as an example of the movable body. However, a magnet piece may be disposed on a link member related to adjustment of the platen gap. FIG. 20 is an explanatory view showing the carriage position at the normal time in another embodiment. FIG. 21 is an explanatory diagram showing the carriage position during platen gap adjustment in another embodiment. In a printing apparatus, the distance (gap) between a print head and a platen is automatically or manually selected according to the thickness of a printing object, for example, the thickness of a printing paper, the thickness of a storage disk such as a CD-R. And a gap adjusting mechanism for maintaining the distance from the print object to the print head at a predetermined distance. As shown in FIG. 20, the gap adjusting mechanism includes a first eccentric gear 27a and a second eccentric gear 27b connected by a link member 27c. The second eccentric gear 27b is driven by an actuator (not shown), for example, an electric motor. A part of the first and second eccentric gears 27a and 27b is connected to the carriage 51, and the carriage 51 moves in the height direction in accordance with the movement of the illustrated first and second eccentric gears 27a and 27b. The position fluctuates. When the printing apparatus is activated, the gap adjusting mechanism is operated between the minimum gap and the maximum gap as part of the initialization process in order to confirm the operation of the gap adjusting mechanism. The example of FIG. 20 shows the position of the gap adjusting mechanism at the time of the minimum gap corresponding to a general sheet thickness. The link member 27 c includes a magnet piece 73 at a position corresponding to the sensor unit 60. At the time of initialization, as shown in FIG. 21, the position of the gap adjusting mechanism changes to a position where the maximum gap is realized. Specifically, when the first and second eccentric gears 27 a and 27 b rotate, the height position of the link member 27 c rises, and the magnet piece 73 reaches the detection distance of the sensor unit 60. Further, the height position of the carriage 51 from the printing target surface is the maximum height. As described above, the initialization process is a process executed with the lid 30 in the closed position, and thus the lid 30 is actually in the closed position due to the movement of the link member 27c as the movable body. It can be determined whether or not. As the movable body, in addition to the carriage 51 and the gap adjusting mechanism, a discharge mechanism that moves up and down to discharge the sheet can be used.

(2) FIG. 22 is a schematic configuration diagram of a printing apparatus including an open / close detection device as a modification. In the above embodiment, a so-called off-carriage type printing apparatus in which no ink cartridge is mounted on the carriage 51 has been described as an example. However, as shown in FIG. 22, CA1 to CA4 are mounted on the carriage 51 on the ink cartridge. Needless to say, the present invention is also applicable to an on-carriage type printing apparatus.

(3) In the above embodiment, an ink jet printer has been described as an example of the printing apparatus 10, but in addition to this, various printers such as a sublimation printer, a dry electrophotographic printer, and a hot melt printer can be used. The same can be applied. In the case of these printers, instead of the carriage, a magnet or the like may be disposed on the movable part that operates during the initial processing of the printing process. Further, in the above-described embodiment, the printing apparatus 10 has been described as an example. However, if the apparatus includes a lid body that can be opened and closed with respect to the main body and includes a movable part inside, the above-described advantage, that is, the lid The accuracy of determining whether or not the body is closed can be improved.

(4) FIG. 23 and FIG. 24 are explanatory views showing the structure of the lid in the modification. In the above-described embodiment, the lid 30 has an open position in which a part of the lid 30 (open side facing the shaft 31) is separated from the main body 20 with respect to the main body 20 around the shaft 31, and the main body 20. The lid body 30 as a whole is moved between an open position where it is separated from the main body 20 and a closed position which covers the main body 20 as shown in FIGS. 23 and 24. A possible configuration may be provided. 23 shows a state in which the lid 30 is in the closed position, and FIG. 24 shows a state in which the lid 30 is in the open position separated from the main body 20. Furthermore, the lid body 30 may be a sliding lid body.

(5) In the above-described embodiment, an example in which the magnet pieces are provided in the carriage 51 and the main body 20 has been described. However, a configuration in which only one magnet piece is used as shown in FIG. FIG. 25 is an explanatory diagram showing a configuration example of a carriage detected piece in a modified example. In this modification, the detection iron plate 70 a is used in place of the carriage magnet piece 70. The detection iron plate 70 a is disposed at a position in the carriage 51 that realizes the closest distance between the carriage magnet piece 70 and the first sensor 62, and extends so that the extension piece overlaps the main body magnet piece 71. Has been. As a result, when the carriage 51 reaches the contact position, the magnetic force of the main body magnet piece 71 acts on the first sensor 62 via the detection iron plate 70a, and the position of the carriage 51 can be detected. According to this modification, the position detection of the carriage 51 can be detected while reducing the number of magnet pieces.

(6) Although the GMR sensor is used as the first and second sensors 62 and 63 in the above embodiment, it may be an MR sensor, or may be an optical or mechanical sensor. Even when an optical or mechanical sensor is used, in addition to a sensor that detects opening and closing of the lid body 30, the lid body 30 can be obtained by using the position information of the movable body and the sensor that detects the position of the movable body. Can be reduced or prevented from being erroneously detected as being in the closed position.

(7) Although the above embodiment has been described using an example applied to the printing apparatus 10 as an open / close detection device, any device that has an openable / closable door and lid and includes a movable body inside can be similarly used. The open / close detection device according to the embodiment can be applied. In other words, the present invention can also be applied to OA equipment such as a scanner that operates a carriage inside the apparatus and a composite printer, and electrical appliances such as a washing machine having a movable part that operates inside the apparatus and a dryer.

(8) In the above embodiment, the sensor unit 60 is mounted on the lid 30, but the position may be moved in conjunction with the opening / closing operation of the lid 30. That is, it is only necessary that the printing apparatus 10 is provided so that the opening / closing operation of the lid 30 can be reflected. For example, the sensor part holding member linked with the opening / closing operation | movement of the cover body 30 by the link member may be mounted | worn. The carriage magnet piece 70 (detected piece) provided in the carriage 51 may be mounted on a detected piece holding member that operates in conjunction with the operation of the carriage 51. That is, it is only necessary to be attached to a member whose position changes in conjunction with the movement of the carriage 51.

(9) In the above embodiment, an ink jet printer has been described as an example of the liquid ejecting apparatus. However, other liquids other than ink (including liquid materials in which particles of functional material are dispersed and fluids such as gels) A configuration as a fluid ejecting apparatus that ejects or discharges a fluid other than a liquid (such as a solid that can be ejected as a fluid) is also possible. Specifically, for example, it is used for manufacturing a liquid material injection device for injecting a liquid material of a material such as an electrode material or a color material used for manufacturing a liquid crystal display, an EL display, a surface light emitting display, a color filter, or the like, or a biochip. It may be a liquid ejecting apparatus that ejects biological organic matter, or a liquid ejecting apparatus that ejects a liquid that is used as a precision pipette and serves as a sample. In addition, transparent resin liquids such as UV curable resin to form liquid injection devices that pinpoint lubricant oil onto precision machines such as watches and cameras, and micro hemispherical lenses (optical lenses) used in optical communication elements. Examples include a liquid ejecting apparatus that ejects a liquid onto a substrate, a liquid ejecting apparatus that ejects an etching solution such as acid or alkali to etch the substrate, a fluid ejecting apparatus that ejects gel, and a powder such as toner. It may be a powder jet recording apparatus that jets a solid.

In addition, this invention can also take the following aspects.
Aspect 1: printing apparatus, wherein the main body and at least a part of the lid are attached to the main body so as to be opened and closed between a closed position that covers the main body and an open position that is separated from the main body A movable body movable within the main body, a movement position detection unit that detects a movement position that is linked to the lid body and that is a position to which the movable body has moved, and the lid body is in a closed position. A printing apparatus comprising: a determination unit that receives a detection result and determines whether or not the lid is in a closed position based on the detected movement position of the movable body.
Aspect 2: The printing apparatus according to Aspect 1 further includes an opening / closing detection unit that detects whether or not the member of the lid is in the closed position in conjunction with the lid, and the determination unit includes the opening / closing The printing apparatus which acquires the detection result that the said cover body exists in the said closed position from a detection part.
Aspect 3: In the printing apparatus according to Aspect 1 or 2, in the main body, an opening / closing detection part is provided at a position facing the opening / closing detection part of the lid, and the movable body detection part in the movable body Printing apparatus provided with a movable body detection part at a position opposite to.
Aspect 4: In the printing apparatus according to any one of Aspects 1 to 3, the detection of the movement position of the movable body by the movement position detection unit is whether or not the movable body is at a predetermined determination position. It is detection, The said judgment part judges whether the said cover body exists in the said closed position based on the movement position detected on the conditions that the said movable body exists in the said determination position.
Aspect 5: In the printing apparatus according to aspect 4, the determination position is a mechanical movement limit position of the movable body to which the movable body moves when the lid is in the closed position, and the determination The printing apparatus determines that the lid is not in the closed position when the movable body is not detected at the determination position.
Aspect 6: In the printing apparatus according to aspect 5, the movable body detection unit outputs an affirmative signal when the movable body is present at the movement limit position, and the determination unit affirms from the movable body detection unit. A printing apparatus that determines that the movable body is not detected at the movement limit position when no signal is received.
Aspect 7: In the printing apparatus according to aspect 4, the determination position is a reference position serving as a reference for fluctuation of the movable body, where the movable body varies when the lid is in the closed position,
The determination unit is a printing apparatus that determines that the lid is not in the closed position when the movable body is not detected at the determination position.
Aspect 8: In the printing apparatus according to aspect 7, the movable body detection unit outputs a negative signal when the movable body is at the reference position, and the determination unit receives a negative signal from the movable body detection unit. The printing apparatus that determines that the movable body is not detected at the reference position when the signal is not received.
Aspect 9: The printing apparatus according to Aspect 5 or 7, wherein the determination unit determines that the lid is in the closed position when the movable body is detected at the determination position.
Aspect 10: The printing apparatus according to any one of aspects 1 to 7, wherein the movable body is a printing mechanism that operates in accordance with execution of printing.
Aspect 11: The printing apparatus according to Aspect 10, wherein the printing mechanism is a carriage.
Aspect 12: In the printing apparatus according to any one of aspects 1 to 11, the main body has an opening, and the lid covers the opening when in the closed position, and the A printing device that is pivotally supported.
Aspect 13: The printing apparatus according to any one of aspects 1 to 12, wherein the movable body detection unit is a magnetoresistive element sensor.
Aspect 14: In the printing apparatus according to any one of aspects 3 to 12, the movable body detection unit and the opening / closing detection unit are magnetoresistive element sensors disposed on the same substrate, and the opening / closing detection unit and the opening / closing detection unit The movable body detected portion is a printing apparatus that is a magnetic body.
Aspect 15: Opening and closing of the lid in a printing apparatus comprising a main body and a lid mounted on the main body so that the main body and an open position at least a part of which covers the main body are separated from the main body An open / close detection method for detecting a detection result that the lid is in the closed position, and a movable body detection unit interlocked with the lid, provided in the printing apparatus and An open / close detection method for detecting a moving position of a movable body whose position moves in accordance with an operation, and determining whether the lid body is in the closed position based on the detected moving position of the movable body.

  As mentioned above, although this invention was demonstrated based on the Example and the modification, Embodiment mentioned above is for making an understanding of this invention easy, and does not limit this invention. The present invention can be changed and improved without departing from the spirit and scope of the claims, and equivalents thereof are included in the present invention.

It is explanatory drawing which shows the external appearance of a printing apparatus provided with the opening / closing detection apparatus which concerns on a present Example. It is a schematic block diagram of a printing apparatus provided with the opening / closing detection apparatus which concerns on a present Example. It is a functional block diagram which shows the internal structure of the control circuit of a printing apparatus provided with the opening / closing detection apparatus which concerns on a present Example. It is the schematic diagram which looked at the 1st and 2nd sensor in a present Example from the front of the printing apparatus. It is the schematic diagram which looked at the 1st and 2nd sensor in a present Example from the right side of a printing apparatus. It is explanatory drawing which shows typically the relationship between the detection magnetic flux density of a GMR sensor, and distance. FIG. 5 is an explanatory diagram illustrating an example in which the carriage is in a movement position other than a predetermined position when the inside of the printing apparatus is viewed from above. FIG. 4 is an explanatory diagram illustrating an example in which the carriage is in a contact position when the inside of the printing apparatus is viewed from above. FIG. 6 is an explanatory diagram illustrating an example in which the carriage is at a home position when the inside of the printing apparatus is viewed from above. It is explanatory drawing which shows the example which has a cover body in an open position. It is explanatory drawing which shows the example which has a cover body in a closed position. It is explanatory drawing which shows the example which may be erroneously detected that a cover body exists in a closed position. It is explanatory drawing which shows the relationship between a sensor part, a carriage magnet piece, and a main body magnet piece when a cover body exists in the closed position shown in FIG. It is explanatory drawing which shows the relationship between a sensor part, a carriage magnet piece, and a main body magnet piece in the case where a cover body exists in the position erroneously detected with the closed position shown in FIG. It is a flowchart which shows the process routine of the cover body opening / closing determination process performed when a carriage exists in a contact position. It is a flowchart which shows the process routine of the cover body opening / closing determination process performed when a carriage exists in a home position. It is a flowchart which shows the process routine of the cover body opening / closing determination process performed based on a carriage position condition and the detection result of a 1st and 2nd sensor. It is explanatory drawing which shows the 1st modification of a magnet piece. It is explanatory drawing which shows the 2nd modification of a magnet piece. It is explanatory drawing which shows the carriage position at the normal time in another Example. It is explanatory drawing which shows the carriage position at the time of platen gap adjustment in another Example. It is a schematic block diagram of a printing apparatus provided with the opening / closing detection apparatus as a modification. It is explanatory drawing which shows the structure of the cover body in a modification. It is explanatory drawing which shows the structure of the cover body in a modification. It is explanatory drawing which shows the structural example of the carriage to-be-detected piece in a modification.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Printing apparatus 12 ... Paper support plate 14 ... Paper receiver 20 ... Main body 23 ... Home position lock 25 ... Sensor part accommodating part 27a ... 1st eccentric gear 27b ... 2nd eccentric gear 27c ... Link member 30 ... Cover 31 ... Axis 40 ... Control circuit 41 ... CPU
DESCRIPTION OF SYMBOLS 42 ... Memory 421 ... Carriage position condition 422 ... Lid opening / closing judgment module 43 ... Input / output interface 44 ... Internal bus signal line 50 ... Printing mechanism 501 ... Contact plate 51 ... Carriage 52 ... Carriage motor 53 ... Platen 54 ... Sliding shaft 55 ... Drive belt 56 ... Pulley 57 ... Paper feed motor 58a ... First paper feed roller 58b ... Second paper feed roller 60 ... Sensor unit 61 ... Substrate 62 ... First sensor 63 ... Second sensor 70 ... Carriage Magnet piece 70a ... Iron plate for detection 71 ... Main body magnet piece 73 ... Magnet piece 80 ... Sensor 90a ... Magnet 90b ... Magnet 92 ... Metal piece CA1-CA4 ... Ink cartridge P ... Printing paper

Claims (14)

A printing device,
A lid capable of covering at least a part of the printing apparatus;
A movable body movable in the printing apparatus;
A lid position detection unit that detects the position of the lid relative to the printing device in conjunction with the lid;
A movable body position detector for detecting the position of the movable body;
Based on the position of the lid and the position of the movable body, the determination unit determines whether or not the lid covers at least a part of the printing apparatus, from the lid position detection unit In response to the detection result that the lid is in a position covering at least a part of the printing apparatus, the lid is at least of the printing apparatus based on the position of the movable body detected by the movable body position detection unit. printing apparatus comprising a determination unit that determines whether a part of the covering position. The printing apparatus according to claim 1 ,
When the lid is in the closed position , the lid body position detector is provided at a position facing the lid body position detector,
A printing apparatus provided with a movable body detection unit at a position facing the movable body position detection unit when the lid is in a closed position . The printing apparatus according to claim 1 or 2 ,
The detection of the position of the movable body by the movable body position detection unit is detection of whether or not the movable body is at a predetermined determination position,
The determination unit determines whether the lid is in a position that covers at least a part of the printing apparatus based on a movable body presence position detected under the condition that the movable body is at the determination position. apparatus. The printing apparatus according to claim 3 .
The determination position is a mechanical movement limit position of the movable body where the movable body moves when the lid body is at a position covering at least a part of the printing apparatus,
When the movable body is not detected at the determination position, the determination unit determines that the lid is not in a position that covers at least a part of the printing apparatus. The printing apparatus according to claim 4 ,
The movable body position detector outputs an affirmative signal when the movable body is at the movement limit position,
The determination unit further determines that the movable body is not detected at the movement limit position when an affirmative signal is not received from the movable body position detection unit. The printing apparatus according to claim 3 .
The determination position is a reference position serving as a reference for fluctuation of the movable body, where the movable body fluctuates when the lid is at a position covering at least a part of the printing apparatus,
The determination unit is an open / close detection device that determines that the lid is not in a position that covers at least a part of the printing apparatus when the movable body is not detected at the determination position. The printing apparatus according to claim 6 .
The movable body position detector outputs a negative signal when the movable body is at the reference position,
The determination apparatus further determines that the movable body is not detected at the reference position when no negative signal is received from the movable body position detection section. The printing apparatus according to claim 4 or 6 ,
When the movable body is detected at the determination position, the determination unit determines that the lid is in a position covering at least a part of the printing apparatus. The printing apparatus according to claim 2,
  The movable body position detection unit and the lid body position detection unit are magnetoresistive element sensors arranged on the same substrate,
  The lid device position detection unit and the movable body detection unit are printing apparatuses that are magnetic materials. The printing apparatus according to any one of claims 1 to 9 ,
The movable body is a printing apparatus that is a printing mechanism that operates in accordance with execution of printing. The printing apparatus according to claim 10.
A printing apparatus in which the printing mechanism is a carriage. The printing apparatus according to any one of claims 1 to 11, further comprising:
Comprising a body having an opening;
The printing apparatus is configured to cover the opening when the lid is in a position covering at least a part of the printing apparatus, and is pivotally supported with respect to the main body. The printing apparatus according to any one of claims 1 to 12,
The movable body position detection unit is a printing apparatus that is a magnetoresistive sensor. An opening / closing detection method for detecting opening / closing of a lid in a printing apparatus,
Detecting the position of the lid relative to the printing device;
Detecting the position of a movable body that is provided in the printing apparatus and whose position moves with the operation of the printing apparatus;
In response to the detection result that the position of the lid is at a position covering at least a part of the printing apparatus, the lid covers at least a part of the printing apparatus based on the detected position of the movable body. An open / close detection method for determining whether or not the vehicle is in a position.

Images