JP2013099957A - Opening/closing determination of opening of apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve an accuracy of the opening/closing determination of an opening of an apparatus.SOLUTION: The apparatus includes: an opening and closing mechanism that opens and closes the opening of the apparatus; a first movable body that moves in response to opening and closing of the opening operated by the opening and closing mechanism; a movement detecting part that detects a movement amount of the first movable body; a determination part that determines whether the opening is closed on the basis of the detected movement amount; a second movable body that is arranged in the apparatus and is movable; and a movement transmitting mechanism that moves the first movable body in response to the movement of the second movable body while the opening is closed, and that prevents the first movable body from moving in response to the movement of the second movable body while the opening is opened.

Description

  The present invention relates to a technique for performing opening / closing determination of an opening of an apparatus.

  The ink jet printer has, for example, an opening for attaching and detaching an ink cartridge, and a cover for opening and closing the opening. In order to avoid the execution of a printing operation with the opening left open, an ink jet printer generally has a determination device that determines whether the opening is closed (opening / closing determination). ing. As the determination device for determining opening / closing of the opening, for example, an opening / closing sensor having a sensor lever that is displaced by interference with the cover when the opening is closed by the cover and a detection unit that detects the displacement of the sensor lever is used ( For example, Patent Document 1).

JP 2006-264160 A

  When a conventional opening / closing sensor is used as a determination device for determining opening / closing of an opening, even if the opening is slightly opened due to contact variation of the opening / closing sensor, the opening cannot be detected. In some cases, it was determined to be closed. Further, since the opening / closing sensor determines that the opening is closed even if the sensor lever interferes with an object other than the cover and is displaced, there is a possibility that the opening / closing state of the opening is erroneously determined. As described above, the conventional determination device that performs open / close determination of the opening has room for improvement in determination accuracy.

  Such a problem is not limited to the opening / closing determination of the opening for attaching / detaching the ink cartridge of the ink jet printer, but is generally a common problem when the opening / closing determination of the opening of the apparatus is performed.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a technique that can improve the accuracy of the opening / closing determination of the opening of the apparatus.

  In order to solve at least a part of the above problems, the present invention can be realized as the following forms or application examples.

[Application Example 1] An apparatus,
An opening and closing mechanism for opening and closing the opening of the device;
A first movable body that moves according to an opening / closing operation of the opening by the opening / closing mechanism;
A motion detector for detecting the amount of motion of the first movable body;
A determination unit for determining whether or not the opening is closed based on the detected amount of movement;
A second movable body disposed in the apparatus and movable;
When the opening is closed, the first movable body is moved according to the movement of the second movable body, and when the opening is open, the second movable body is moved. A movement transmission mechanism that does not move the first movable body in response to movement.

  In this device, the first movable body moves according to the opening / closing operation of the opening by the opening / closing mechanism, and it is determined whether the opening is closed based on the detected amount of movement of the first movable body. In addition, when the opening is closed, the first movable body is moved according to the movement of the second movable body by the motion transmission mechanism, and when the opening is open, the second movable body is moved. The first movable body is not moved according to the movement of. Therefore, in this apparatus, the accuracy of the opening / closing determination of the opening of the apparatus can be improved.

Application Example 2 The apparatus according to Application Example 1,
The first movable body is a linear scale that reciprocates according to the opening / closing operation of the opening by the opening / closing mechanism,
The motion transmission mechanism is a device that moves the linear scale according to the movement of the second movable body in a state where the opening is closed.

  In this device, the amount of movement of the linear scale that reciprocates according to the opening / closing operation of the opening by the opening / closing mechanism is detected, and it is determined whether the opening is closed based on the detected amount of movement. The motion transmission mechanism moves the linear scale according to the movement of the second movable body in a state where the opening is closed. Therefore, in this apparatus, the accuracy of the opening / closing determination of the opening of the apparatus can be improved.

[Application Example 3] The motor control device according to Application Example 1,
The first movable body is a rotation scale that rotates in accordance with the opening / closing operation of the opening by the opening / closing mechanism, and the motion transmission mechanism is configured to move the second movable body in a state where the opening is closed. An apparatus for rotating the rotary scale in response to movement.

  In this apparatus, the amount of movement of the rotating scale that rotates according to the opening / closing operation of the opening by the opening / closing mechanism is detected, and it is determined whether the opening is closed based on the detected amount of movement. In addition, the motion transmission mechanism rotates the rotation scale according to the movement of the second movable body in a state where the opening is closed. Therefore, in this apparatus, the accuracy of the opening / closing determination of the opening of the apparatus can be improved.

Application Example 4 The apparatus according to Application Example 2 or Application Example 3,
The first movable body has a plurality of slits arranged along the direction of movement,
The motion detection unit includes a light emitting unit that emits light and a light receiving unit that receives light emitted from the light emitting unit, and determines the amount of movement of the first movable body based on a signal indicating a light receiving state by the light receiving unit. Detect device.

  In this apparatus, the motion detector can detect the amount of motion of the first movable body.

Application Example 5 The apparatus according to any one of Application Example 1 to Application Example 4,
The apparatus, wherein the second movable body is a carriage that reciprocates within the apparatus.

  In this apparatus, the accuracy of the opening / closing determination of the opening of the apparatus can be improved by using a carriage that reciprocates in the apparatus.

  Note that the present invention can be realized in various modes, and can be realized, for example, in the form of an opening / closing determination method and apparatus for an opening, a printing apparatus, and the like.

1 is an explanatory diagram illustrating a schematic configuration of a printer 10 according to a first embodiment of the present invention. FIG. 3 is an explanatory diagram illustrating a state where an upper housing 30 of the printer 10 has moved upward. FIG. 4 is an explanatory diagram showing a configuration of a sensor unit 400. FIG. 3 is an explanatory diagram illustrating a configuration of a printing mechanism unit 50. FIG. 4 is an explanatory diagram showing a relationship between a carriage 60 and a sensor unit 400. FIG. It is explanatory drawing which shows the relationship between the carriage 60a and the sensor unit 400 in 2nd Example. It is explanatory drawing which shows schematic structure of the sensor unit 400b in 3rd Example. It is explanatory drawing which shows the relationship between the carriage 60b and sensor unit 400b in 3rd Example. It is explanatory drawing which shows schematically the structure of the printer 10c in 4th Example. It is explanatory drawing which shows the structure of the sensor unit 700 in 4th Example. It is explanatory drawing which shows the relationship between the carriage 60c and the sensor unit 700 in 4th Example.

  Next, an embodiment of the present invention will be described based on the first to fourth examples and modifications.

A. First embodiment:
FIG. 1 is an explanatory diagram showing a schematic configuration of a printer 10 according to the first embodiment of the present invention. The printer 10 is an ink jet printer that records characters and figures by ejecting liquid ink onto a printing paper P that is a recording medium. The printer 10 is a so-called multi-function printer and has a scanner function for optically reading an image.

  As shown in FIG. 1, the printer 10 includes a main body housing 20 that houses a printing mechanism unit 50. In the main body casing 20, the paper feed tray 12 that introduces the printing paper P supplied to the printing mechanism unit 50 into the main body casing 20, and the printing paper P discharged from the printing mechanism unit 50 is stored in the main body casing. A paper discharge tray 14 led out to the outside of 20 is provided. A detailed configuration of the printing mechanism unit 50 will be described later.

  The main body housing 20 accommodates a control unit 40 that controls each unit of the printer 10. In this embodiment, the control unit 40 includes hardware such as a central processing unit (CPU), a read only memory (Read Only Memory, ROM), and a random access memory (Random Access Memory, RAM). ASIC (Application Specific Integrated Circuits). Software that implements various functions of the printer 10 is installed in the control unit 40.

  An upper housing 30 is disposed on the upper portion of the main body housing 20. The upper housing 30 houses a scanner mechanism (not shown) that realizes a scanner function. The upper housing 30 is installed in the main body housing 20 so as to be rotatable about the rotation shaft 350. FIG. 2 is an explanatory diagram illustrating a state in which the upper housing 30 of the printer 10 has moved upward. When the upper housing 30 rotates upward about the rotation shaft 350, the opening 22 (FIG. 1) provided in at least a part of the upper surface of the main body housing 20 is opened. In this state, the user can access the printing mechanism unit 50 through the opening 22. When the upper housing 30 rotates downward and covers the upper portion of the main body housing 20 (see FIG. 1), the opening 22 is closed. The upper housing 30 corresponds to the opening / closing mechanism in the present invention.

  As shown in FIG. 2, the printer 10 includes a sensor unit 400. FIG. 3 is an explanatory diagram showing the configuration of the sensor unit 400. FIG. 3A is a perspective view of the sensor unit 400, and FIG. 3B is a front view of the sensor unit 400. As shown in FIGS. 2 and 3, the sensor unit 400 includes a linear scale 420 and a sensor 410.

  The linear scale 420 is joined to the upper housing 30 (see FIG. 2), and along the longitudinal direction according to the rotational movement of the upper housing 30 (that is, the opening / closing operation of the opening 22 of the main body housing 20). It reciprocates (see the arrow in FIG. 3B). The linear scale 420 has a plurality of slits (not shown) arranged at a predetermined interval (for example, 180 dpi) along the longitudinal direction. The linear scale 420 corresponds to the first movable body in the present invention.

  The sensor 410 is a photointerrupter sensor having a light emitting unit 412 and a light receiving unit 414 that are opposed to each other with a linear scale 420 interposed therebetween. The light emitting unit 412 emits light from a light emitting element (not shown), and the light receiving unit 414 receives light emitted from the light emitting unit 412 by a light receiving element (not shown). The sensor 410 is fixed to the printing mechanism unit 50 (or the main body housing 20).

  When the linear scale 420 moves along the longitudinal direction along with the rotational movement of the upper housing 30, a light receiving state in which light emitted from the light emitting unit 412 passes through the slit of the linear scale 420 and is received by the light receiving unit 414; The non-light receiving state in which the light emitted from the light emitting unit 412 is blocked by the linear scale 420 and not received by the light receiving unit 414 is alternately repeated. At this time, the light receiving unit 414 outputs a pulse signal representing repetition between the light receiving state and the non-light receiving state. In the present embodiment, the light receiving unit 414 outputs two pulse signals having different phases. The sensor 410 detects the moving direction and moving amount of the linear scale 420 based on the phase shift and the number of pulses of the two pulse signals. Note that the movement amount of the linear scale 420 can also be expressed as a movement amount. The sensor unit 400 corresponds to the motion detection unit in the present invention in order to detect the motion amount of the linear scale 420.

  FIG. 4 is an explanatory diagram illustrating the configuration of the printing mechanism unit 50. The printing mechanism unit 50 includes a rectangular platen 530 disposed in a printing region where ink droplets are ejected onto the printing paper P. On the platen 530, the printing paper P is fed by a paper feeding mechanism (not shown). The printing mechanism unit 50 also includes a carriage 60 on which an ink cartridge Ic is mounted and having a recording head 610. The carriage 60 is supported by the guide rod 520 so as to be movable along the longitudinal direction of the platen 530, and is driven by the carriage motor 510 via the timing belt 512. As a result, the carriage 60 reciprocates (main scans) on the platen 530 along the longitudinal direction. The recording head 610 receives ink supplied from the ink cartridge Ic mounted on the carriage 60 and ejects ink onto the printing paper P. The carriage 60 corresponds to the second movable body in the present invention.

  As shown in FIG. 4, the carriage 60 has a tapered portion 61 having a substantially triangular prism shape at one end along the moving direction.

  FIG. 5 is an explanatory diagram showing the relationship between the carriage 60 and the sensor unit 400. FIG. 5 is a view of the carriage 60 and the sensor unit 400 as viewed from the side. As illustrated in FIG. 5, the printer 10 includes a transmission unit 800 that is interposed between the carriage 60 and the sensor unit 400. The transmission part 800 includes a ring part 810 having a circular cross section and a support part 820 that is connected to the ring part 810 and can support the lower end of the linear scale 420. The transmission portion 800 is disposed at a position where the ring portion 810 interferes with the taper surface 62 of the taper portion 61 of the carriage 60 when the carriage 60 moves, and the ring portion 810 changes to the taper surface 62 as the carriage 60 approaches. As a whole, it is pushed upward as a whole. The taper portion 61 and the transmission portion 800 of the carriage 60 correspond to the motion transmission mechanism in the present invention.

  In the open closed state (see FIG. 1) in which the upper housing 30 covers the upper portion of the main body housing 20 and the opening 22 is closed, the transmission unit 800 is located above the transmission unit 800 as the carriage 60 moves. The support portion 820 is disposed at such a position as to push the linear scale 420 upward in accordance with the movement to. In addition, the transmission unit 800 is in an open open state (see FIG. 2) in which the upper housing 30 moves upward to open the opening 22 (that is, the linear scale 420 is moved upward). Even if the transmission unit 800 moves upward as the carriage 60 moves, the support unit 820 does not interfere with the linear scale 420, and the linear scale 420 is not pushed up. Therefore, in the printer 10, the linear scale 420 can be moved upward according to the movement of the carriage 60 in the opening closed state, but the linear scale 420 is moved according to the movement of the carriage 60 in the opening open state. I can't.

  In the printer 10 according to the present embodiment, the control unit 40 determines whether the opening 22 of the main body housing 20 is open or closed based on the detection result of the sensor unit 400. That is, the control unit 40 functions as a determination unit in the present invention. Specifically, the control unit 40 sets the reference state of the linear scale 420 detected by the sensor 410 as a reference state where the upper case 30 covers the upper part of the main body case 20 and the opening 22 is closed. The position of the upper housing 30 is detected based on the moving direction and moving amount from the state, and it is determined whether the opening 22 is closed or opened. Therefore, in the printer 10 of the present embodiment, the opening / closing determination of the opening 22 can be executed with high accuracy regardless of the product variations in the dimensions and positions of the respective parts of the printer 10.

  The closed opening 22 may mean only a state in which the opening 22 is completely closed by an opening / closing mechanism such as the upper housing 30. In this case, the control unit 40 determines that the opening 22 is closed when the detected amount of movement of the linear scale 420 from the reference state is zero, and the detected amount of movement is greater than zero. In this case, it is determined that the opening 22 is open. Moreover, the opening 22 is not limited to a state in which the opening 22 is completely closed, but may include a state in which the opening 22 is opened by a predetermined small opening amount. Good. In this case, the control unit 40 determines that the opening 22 is closed when the detected amount of movement of the linear scale 420 from the reference state is equal to or smaller than a predetermined threshold, and the detected amount of movement is If it is greater than the predetermined threshold, it is determined that the opening 22 is open.

  In addition, the control unit 40 can perform opening / closing determination of the opening 22 based on the presence / absence of the movement of the linear scale 420 according to the movement of the carriage 60. That is, the control unit 40 moves the carriage 60 to a position where it can interfere with the transmission unit 800, and the opening 22 is closed when the movement of the linear scale 420 corresponding to the movement of the carriage 60 is detected by the sensor 410. If the movement of the linear scale 420 corresponding to the movement of the carriage 60 is not detected, it is determined that the opening 22 is open. Therefore, for example, when the controller 40 determines that the opening 22 is closed in the opening / closing determination of the opening 22 based on the moving direction and the moving amount of the linear scale 420 from the reference state, the carriage 60 further The opening / closing determination of the opening 22 based on the presence / absence of the movement of the linear scale 420 according to the movement is performed, and only when the opening 22 is determined to be closed in both opening / closing determinations, the opening is finally truly opened. It can be determined that 22 is closed. As a result, in the determination based on the moving direction and moving amount from the reference state of the linear scale 420, it is erroneously assumed that the opening 22 is closed for some reason even though the opening 22 is actually open. Even if the determination is made, erroneous determination can be prevented by performing determination based on the presence or absence of the movement of the linear scale 420 according to the movement of the carriage 60. Therefore, in the printer 10 of the present embodiment, the accuracy of the open / close determination of the opening 22 of the main body housing 20 can be improved.

B. Second embodiment:
FIG. 6 is an explanatory diagram showing the relationship between the carriage 60a and the sensor unit 400 in the second embodiment. FIG. 6 is a view of the carriage 60a and the sensor unit 400 as viewed from the side. Also in the second embodiment, as in the first embodiment shown in FIG. 5, the transmission unit 800 is interposed between the carriage 60 a and the sensor unit 400. However, in the second embodiment, the relationship between the carriage 60a and the transmission unit 800 is different from that in the first embodiment shown in FIG. Other configurations of the printer 10 of the second embodiment are the same as those of the first embodiment.

  As shown in FIG. 6, in the second embodiment, the carriage 60a has a bar-shaped connecting portion 63 extending obliquely downward from the carriage 60a. The connecting part 63 has an oblong hole part 64, and the ring part 810 of the transmission part 800 is fitted in the hole part 64 so as to be slidable. The connecting portion 63 and the transmission portion 800 of the carriage 60a correspond to the motion transmission mechanism in the present invention.

  Also in the second embodiment, when the carriage 60a moves toward the transmission portion 800, the position of the ring portion 810 in the hole 64 of the connecting portion 63 moves upward, and the transmission portion 800 is pushed upward as a whole. Accordingly, in the second embodiment, as in the first embodiment, the opening / closing determination of the opening 22 based on the presence / absence of the movement of the linear scale 420 according to the movement of the carriage 60a can be performed. The accuracy of the opening / closing determination of the opening 22 can be improved.

C. Third embodiment:
FIG. 7 is an explanatory diagram showing a schematic configuration of the sensor unit 400b in the third embodiment. The third embodiment is different from the sensor unit 400 (FIG. 3) in the first embodiment in that the sensor unit 400 b has a rotary scale (rotation scale) 430 instead of the linear scale 420. Other configurations of the printer 10 of the third embodiment are the same as those of the first embodiment.

  The rotary scale 430 is rotated in accordance with the rotational movement of the upper casing 30 (that is, the opening / closing operation of the opening 22 of the main body casing 20) (see the arrow in FIG. 7). Combined with. Further, the rotary scale 430 has a plurality of slits (not shown) arranged at predetermined intervals along the circumferential direction. Similar to the first embodiment, the sensor 410 detects the rotation direction and amount of rotation of the rotary scale 430 based on the phase shift and the number of pulses of two pulse signals having different phases. Note that the rotation amount of the rotary scale 430 can also be expressed as a movement amount. The rotary scale 430 corresponds to the first movable body in the present invention.

  FIG. 8 is an explanatory diagram showing the relationship between the carriage 60b and the sensor unit 400b in the third embodiment. FIG. 8A is a side view of the carriage 60b and the sensor unit 400b. Moreover, FIG.8 (b) is BB sectional drawing of Fig.8 (a). The carriage 60b has an arm portion 65 that extends horizontally in the direction of the sensor unit 400b. As shown in FIG. 8A, a plurality of teeth are formed on the upper surface of the arm portion 65. The rotary scale 430 is connected to the gear 436 via the intermediate member 434. The teeth of the gear 436 mesh with the teeth of the arm portion 65, and the gear 436 rotates as the carriage 60b (the arm portion 65) moves horizontally. Therefore, the rotary scale 430 also rotates with the horizontal movement of the carriage 60b (the arm portion 65). The arm portion 65 and the gear 436 of the carriage 60b correspond to the motion transmission mechanism in the present invention.

  The positional relationship between the arm portion 65 and the gear 436 is such that the teeth of the gear 436 are in the open closed state (see FIG. 1) in which the upper housing 30 covers the upper portion of the main body housing 20 and the opening 22 is closed. And the teeth of the arm portion 65 mesh with each other, and the upper housing 30 moves upward to open the opening 22 (see FIG. 2) (that is, the rotary scale 430 and the gear 436 move upward). In a moving state), the teeth of the gear 436 and the teeth of the arm portion 65 are in a positional relationship such that they do not bite. Therefore, the rotary scale 430 can be rotated according to the movement of the carriage 60b in the opening closed state, but the rotary scale 430 cannot be rotated according to the movement of the carriage 60b in the opening open state.

  Also in the third embodiment, since the rotary scale 430 rotates according to the rotational movement of the upper housing 30 (that is, the opening / closing operation of the opening 22 of the main body housing 20), the rotational direction of the rotary scale 430 by the sensor unit 400b and The opening / closing determination of the opening portion 22 of the main body housing 20 can be performed based on the detection result of the rotation amount, and the opening / closing determination of the opening portion 22 is executed with high accuracy regardless of variations in the dimensions and positions of the respective portions of the printer 10. Can do. Also in the third embodiment, since the opening / closing determination of the opening 22 can be performed based on the presence / absence of the rotation of the rotary scale 430 according to the movement of the carriage 60b, the opening / closing determination of the opening 22 of the main body housing 20 is possible. Accuracy can be improved.

D. Fourth embodiment:
FIG. 9 is an explanatory diagram schematically showing the configuration of the printer 10c in the fourth embodiment. In the fourth embodiment, the configuration of the sensor unit 700 is different from the sensor unit 400 of the first embodiment shown in FIG. Other configurations of the printer 10c of the fourth embodiment are the same as those of the first embodiment.

  The sensor unit 700 in the fourth embodiment includes a light emitting unit 710, a light receiving unit 720, and a linear scale 730, which will be described later. As shown in FIG. 9, the light emitting unit 710 is joined to the upper housing 30 and moves up and down according to the rotational movement of the upper housing 30 (that is, the opening / closing operation of the opening 22 of the main body housing 20). . The light receiving unit 720 is fixed to the printing mechanism unit 50 (or the main body housing 20). That is, the relative positional relationship between the light emitting unit 710 and the light receiving unit 720 changes according to the rotational movement of the upper housing 30. In the open closed state in which the upper housing 30 covers the upper portion of the main body housing 20 and the opening 22 is closed, the optical axis of the light emitting unit 710 and the optical axis of the light receiving unit 720 coincide with each other. Becomes a state in which light emitted from the light emitting unit 710 can be received. On the other hand, in the open state where the upper housing 30 is rotated upward and the opening 22 is opened, the optical axis of the light emitting unit 710 and the optical axis of the light receiving unit 720 do not match, and the light receiving unit 720 The light emitted from the light emitting unit 710 cannot be received.

  FIG. 10 is an explanatory diagram showing the configuration of the sensor unit 700 in the fourth embodiment. FIG. 10 is a side view of the sensor unit 700 viewed from the side in a state where the optical axis Ae of the light emitting unit 710 and the optical axis Ar of the light receiving unit 720 are matched (that is, in an opening closed state). The linear scale 730 of the sensor unit 700 is disposed at a position that interferes with the optical axis when the optical axis Ae of the light emitting unit 710 and the optical axis Ar of the light receiving unit 720 match. That is, the linear scale 730 is positioned on the light path from the light emitting unit 710 to the light receiving unit 720 in the open closed state in which the opening 22 is closed. Moreover, the linear scale 730 has a plurality of slits (not shown) arranged at predetermined intervals along the longitudinal direction (horizontal direction).

  FIG. 11 is an explanatory diagram showing the relationship between the carriage 60c and the sensor unit 700 in the fourth embodiment. FIG. 11 is a view of the carriage 60c and the sensor unit 700 as viewed from above. Similar to the first embodiment, the carriage 60c has a tapered portion 61c. However, the taper portion 61c of the fourth embodiment is different from the taper portion 61 of the first embodiment in that the taper surface 62c exists on the side instead of the upper side. In addition, the printer 10c includes a transmission unit 800c interposed between the carriage 60c and the sensor unit 700. Similar to the first embodiment, the transmission portion 800c includes a ring portion 810c and a support portion 820c. The transmission portion 800c is disposed at a position where the ring portion 810c interferes with the taper surface 62c of the taper portion 61c of the carriage 60c when the carriage 60c moves, and the ring portion 810c is brought into contact with the taper surface 62c as the carriage 60c approaches. By moving horizontally along, it moves horizontally as a whole. The transmission unit 800c is disposed at a position where the support unit 820c horizontally moves the linear scale 730 in accordance with the horizontal movement of the transmission unit 800c accompanying the movement of the carriage 60c. The moving direction of the linear scale 730 at this time is a direction in which a plurality of slits are arranged (see arrows in FIG. 11).

  In a state where the optical axis Ae of the light emitting unit 710 and the optical axis Ar of the light receiving unit 720 shown in FIG. 10 are matched (that is, the opening is closed), the sensor unit 700 can detect the movement of the linear scale 730. That is, when the linear scale 730 is stationary, the light receiving unit 720 always outputs a signal indicating the light receiving state, while when the linear scale 730 is moving, the light receiving unit 720 is in a light receiving state and a non-light receiving state. A pulse signal representing the repetition of is output. Accordingly, when the light receiving unit 720 outputs a pulse signal, the movement of the linear scale 730 is detected. On the other hand, in a state where the optical axis Ae of the light emitting unit 710 and the optical axis Ar of the light receiving unit 720 do not match (that is, in an open state), the light receiving unit 720 is always not receiving light regardless of whether the linear scale 730 is moved. Since the signal indicating the state is output, the sensor unit 700 cannot detect the movement of the linear scale 730.

  In the printer 10c of the fourth embodiment, the control unit 40 determines whether the opening 22 of the main body housing 20 is open or closed by detecting the coincidence of the optical axes of the light emitting unit 710 and the light receiving unit 720. That is, the control unit 40 functions as a determination unit in the present invention. Specifically, when the control unit 40 detects that the light receiving unit 720 always outputs a signal indicating the light receiving state, the control unit 40 determines that the opening 22 is closed, and the light receiving unit 720 always receives no light. When it is detected that a signal representing the state is output, it is determined that the opening 22 is open.

  In addition, the control unit 40 can perform opening / closing determination of the opening 22 based on whether or not the movement of the linear scale 730 according to the movement of the carriage 60c is detected. That is, the control unit 40 moves the linear scale 730 by moving the carriage 60c to a position that interferes with the transmission unit 800c, and determines whether or not the movement of the linear scale 730 is detected by the sensor unit 700. The control unit 40 determines that the opening 22 is closed when the movement of the linear scale 730 is detected, and determines that the opening 22 is open when the movement of the linear scale 730 is not detected. In the fourth embodiment, the opening / closing determination of the opening 22 by detecting the coincidence of the optical axes of the light emitting unit 710 and the light receiving unit 720 is actually in a state where the opening 22 is opened for some reason. Even when it is erroneously determined that the opening 22 is closed, erroneous determination is prevented by performing open / close determination based on whether or not the movement of the linear scale 730 is detected according to the movement of the carriage 60c. be able to. Therefore, in the printer 10c of the fourth embodiment, the accuracy of the open / close determination of the opening 22 of the main body housing 20 can be improved.

E. Variations:
The present invention is not limited to the above-described examples and embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications are possible.

E1. Modification 1:
In each of the above embodiments, the printer 10 is a multi-function printer, but the printer 10 may be a single-function printer that does not have a scanner function. In this case, the opening 22 may be opened and closed by the cover. The printer 10 is a so-called on-carriage type printer in which the ink cartridge Ic is mounted on the carriage 60. However, the printer 10 may be a so-called off-carriage type printer in which the ink cartridge Ic is not mounted on the carriage 60. Good. Further, the printer 10 may be another type of printer (for example, a laser printer) instead of an ink jet type printer.

  In each of the above-described embodiments, the opening / closing determination of the opening 22 of the main body casing 20 has been described. However, the present invention is not limited to other openings (for example, an opening for paper discharge opened and closed by the paper discharge tray 14 (see FIG. 1))). In each of the above embodiments, the opening / closing determination of the opening of the printer 10 has been described. However, the present invention is not limited to the printer 10 and can be applied to the opening / closing determination of the opening of the apparatus in general. In each of the above embodiments, since the position of the upper housing 30 can be detected with high accuracy, the present invention is not limited to the opening / closing determination of the opening, but is used to detect the opening amount (opening degree) of the opening / closing mechanism. Is also applicable.

E2. Modification 2:
In each of the above embodiments, a sensor in which a light emitting unit (light emitting unit 412 or light emitting unit 710) and a light receiving unit (light receiving unit 414 or light receiving unit 720) are arranged to face each other is used as the sensor. It is also possible to adopt a reflective sensor in which the light receiving unit and the light receiving unit are arranged in parallel.

E3. Modification 3:
In each of the above embodiments, the linear scale 420, the rotary scale 430, the linear scale 730, and the like are employed as the first movable body, but the first movable body does not have to be a scale. In each of the above embodiments, the sensor unit 400 or the sensor unit 700 is employed as a motion detection unit that detects the amount of motion of the first movable body. However, the motion detection unit calculates the amount of motion of the first movable body. If it detects, it does not need to be a sensor. For example, in the first embodiment, the sensor 410 is connected to the upper housing 30 and moves up and down according to the rotational movement of the upper housing 30, and the linear scale 420 is moved to the printing mechanism unit 50 (or the main body housing 20). It may be fixed. In this case, the sensor 410 corresponds to the first movable body.

  In each of the above embodiments, the carriage 60 (60a, 60b, 60c) is employed as the second movable body, but the second movable body may be another moving element. For example, a processing gap adjustment mechanism (APG) in which a printer adjusts a gap between the surface of the platen 530 and the recording head 610 for printing processing on printing paper P having different thicknesses or direct printing on a CD-R surface. : Auto Platen Gap mechanism) (see Japanese Patent Application Laid-Open No. 2008-80649), the processing gap adjustment mechanism can be used as the second movable body. When the printer has an EJ frame (discharge frame), the EJ frame can be used as the second movable body.

E4. Modification 4:
In the fourth embodiment, the linear scale 730 moves horizontally according to the movement of the carriage 60c regardless of whether the opening is closed or the opening is open. The linear scale 730 is moved according to the movement of the body 30 (that is, the opening / closing operation of the opening 22), and the linear scale 730 is not horizontally moved according to the movement of the carriage 60c in the opened state. It is also possible to do. Further, the movement direction of the linear scale 730 according to the movement of the carriage 60c is not limited to the horizontal direction, and may be a vertical direction or an oblique direction.

  In the fourth embodiment, the light emitting unit 710 is connected to the upper housing 30 and the light receiving unit 720 is fixed to the printing mechanism unit 50 (or the main body housing 20). The light emitting unit 710 may be fixed to the printing mechanism unit 50 (or the main body housing 20), connected to the upper housing 30.

  In the fourth embodiment, the linear scale 730 is employed as the first movable body. However, instead of the linear scale 730, the linear scale 730 has a plurality of slits along the circumferential direction to move the carriage 60c. It is also possible to use a rotating scale that rotates accordingly.

E5. Modification 5:
In each of the above embodiments, the tapered portion 61, the connecting portion 63, and the arm portion 65 are integrated with the carriage 60. However, the tapered portion 61, the connecting portion 63, and the arm portion 65 are separated from the carriage 60. It is also possible to adopt a configuration that is a body. Also in this case, a configuration may be adopted in which the tapered portion 61, the connecting portion 63, and the arm portion 65 as separate members move in accordance with the movement of the carriage 60.

  In addition, when the configuration in which the tapered portion 61, the connecting portion 63, and the arm portion 65 are integrated with the carriage 60 as in the above embodiments, the carriage 60 does not jump out of the printer 10. Designed.

E6. Modification 6:
In each of the above embodiments, a part of the configuration realized by hardware may be replaced with software, and conversely, a part of the configuration realized by software may be replaced by hardware. .

  In addition, when part or all of the functions of the present invention are realized by software, the software (computer program) can be provided in a form stored in a computer-readable recording medium. In the present invention, the “computer-readable recording medium” is not limited to a portable recording medium such as a flexible disk or a CD-ROM, but an internal storage device in a computer such as various RAMs and ROMs, a hard disk, and the like. An external storage device fixed to the computer is also included.

DESCRIPTION OF SYMBOLS 10 ... Printer 12 ... Paper feed tray 14 ... Paper discharge tray 20 ... Main body housing 22 ... Opening 30 ... Upper housing 40 ... Control part 50 ... Printing mechanism part 60 ... Carriage 61 ... Tapered part 62 ... Tapered surface 63 ... Connection Portion 64 ... Hole portion 65 ... Arm portion 350 ... Rotating shaft 400 ... Sensor unit 410 ... Sensor 412 ... Light emitting portion 414 ... Light receiving portion 420 ... Linear scale 430 ... Rotary scale 434 ... Intermediate member 436 ... Gear 510 ... Carriage motor 512 ... Timing belt 520 ... guide rod 530 ... platen 610 ... recording head 700 ... sensor unit 710 ... light emitting part 720 ... light receiving part 730 ... linear scale 800 ... transmission part 810 ... ring part 820 ... support part

In order to solve at least a part of the above problems, the present invention can be realized as the following forms or application examples. For example, the present invention is an apparatus, an opening / closing mechanism that opens and closes an opening of the apparatus, a first movable body that moves according to an opening / closing operation of the opening by the opening / closing mechanism, and the apparatus A second movable body which is disposed within and movable, a mechanism capable of transmitting the movement of the second movable body and capable of pushing the first movable body, A detection unit capable of detecting a signal corresponding to the movement of one movable body; and the opening that controls the movement of the second movable body and is based on the signal detected by the detection unit A control unit that determines whether or not the opening is closed, the control unit moves the second movable body, pushes the first movable body by the mechanism, and the opening is closed. It can be realized as an apparatus that determines whether or not there is. In addition, the present invention can be realized as the following forms or application examples.

Claims (5)

A device,
An opening and closing mechanism for opening and closing the opening of the device;
A first movable body that moves according to an opening / closing operation of the opening by the opening / closing mechanism;
A motion detector for detecting the amount of motion of the first movable body;
A determination unit for determining whether or not the opening is closed based on the detected amount of movement;
A second movable body disposed in the apparatus and movable;
When the opening is closed, the first movable body is moved according to the movement of the second movable body, and when the opening is open, the second movable body is moved. A movement transmission mechanism that does not move the first movable body in response to movement. The apparatus of claim 1, comprising:
The first movable body is a linear scale that reciprocates according to the opening / closing operation of the opening by the opening / closing mechanism,
The motion transmission mechanism is a device that moves the linear scale according to the movement of the second movable body in a state where the opening is closed. The apparatus of claim 1, comprising:
The first movable body is a rotation scale that rotates according to an opening / closing operation of the opening by the opening / closing mechanism,
The motion transmission mechanism rotates the rotary scale in accordance with the movement of the second movable body in a state where the opening is closed. An apparatus according to claim 2 or claim 3, wherein
The first movable body has a plurality of slits arranged along the direction of movement,
The motion detection unit includes a light emitting unit that emits light and a light receiving unit that receives light emitted from the light emitting unit, and determines the amount of movement of the first movable body based on a signal indicating a light receiving state by the light receiving unit. Detect device. An apparatus according to any one of claims 1 to 4,
The apparatus, wherein the second movable body is a carriage that reciprocates within the apparatus.

Images