JP4640584B2 - Recording medium detection device and recording device - Google Patents

Description

  The present invention relates to a recording medium detection apparatus that is provided in a conveyance path for conveying a recording medium and detects the passage of the recording medium, and a recording apparatus including the recording medium detection apparatus. The present invention also relates to a liquid ejecting apparatus.

Here, the liquid ejecting apparatus uses an ink jet recording head, and is not limited to a recording apparatus such as a printer, a copying machine, and a facsimile machine that discharges ink from the recording head to perform recording on a recording medium. And a device that ejects a liquid corresponding to the application from a liquid ejecting head corresponding to the ink jet recording head to an ejected medium corresponding to a recording medium, and adheres the liquid to the ejected medium. .
In addition to the recording head, as a liquid ejecting head, a color material ejecting head used for manufacturing a color filter such as a liquid crystal display, and an electrode material (conductive paste) used for forming an electrode such as an organic EL display or a surface emitting display (FED) Examples thereof include an ejection head, a bioorganic matter ejection head used for biochip production, and a sample ejection head as a precision pipette.

  There is a printer as an example of a recording apparatus or a liquid ejecting apparatus. In a printer, a paper detection device that detects passage of the leading edge and the trailing edge of a sheet is provided at a predetermined position in a sheet conveyance path for conveying a sheet as an example of a recording medium or an ejection medium, and the leading edge or the trailing edge of the sheet is provided. Necessary paper feed control is performed by detecting the passage of the edge. As a typical paper detection device, there is one provided with a lever-like member that is rotatably provided in a paper conveyance path, and detection means that detects a rotational displacement of the lever-like member. In a non-contact state with the paper, the lever-like member receives the urging force of the urging means and protrudes into the paper conveyance path. When the lever-shaped member comes into contact with the paper as the paper passes, the lever-like member rotates and retracts from the paper conveyance path.

  In Cited Document 1, there is a problem in either direction when the paper is sent from the downstream side to the upstream side of the paper conveyance path with respect to the lever-like member and when the paper is sent from the upstream side to the downstream side. The tip of the main lever that is pivotally supported so as to be able to rotate only in the paper feeding direction is provided with a self-returning behavior to a standing posture and can be rotated only in the anti-paper feeding direction. A paper detection device provided with an auxiliary lever is disclosed.

JP-A-8-259037

According to the paper detection device described in the above cited document 1, there is no problem in paper feeding in any direction. For example, even when the user pulls out the paper from the upstream side during paper jam processing, the lever-like member is used. It is possible to avoid problems such as damage.
However, since the lever-like member has a two-body structure of a main lever and an auxiliary lever in the paper detection device, the paper can pass through compared to a single-form lever-like member because of component accuracy or assembly accuracy. The detection accuracy at the time of detection is inferior, and when a strong force is applied at the time of paper jam processing as described above, it has a drawback of being easily damaged.

  On the other hand, in recent years, as called home DPE, inkjet printers that can easily realize super high-quality printing comparable to silver salt photographs at home are generally widely used. In such inkjet printers, In order to obtain an output result equivalent to that of a salt photograph, what has been configured to perform so-called borderless printing in which printing is performed without margins on four sides of a printing paper has become the mainstream.

  Borderless printing has the property that the periphery of the original image data is discarded because ink is ejected to the edge of the paper without any margins by ejecting ink to the area outside the edge of the paper. Therefore, in borderless printing, it is desired to reduce the discard amount of image data as much as possible, that is, to reduce the amount of ink to be discarded. For this purpose, it is necessary to position the sheet with high accuracy. However, if the lever-like member has a two-body structure as described above, the sheet may not be positioned with high accuracy. On the other hand, if a single lever-like member that can be rotated only in the paper feed direction is used, the lever-like member is damaged when the user pulls out the paper from the upstream side during paper jam processing. There is a risk of causing problems.

  Therefore, the present invention has been made in view of such a situation, and the problem is that it is possible to detect the passage of a sheet with high accuracy using a single-shaped lever-like member, and that the sheet is unloaded during jam processing. An object of the present invention is to obtain a sheet detection device that does not damage the lever-like member even when the sheet is pulled out from the upstream side of the sheet conveyance path.

  In order to solve the above problems, a first aspect of the present invention is provided in a transport path for transporting a recording medium, and is in contact with a recording medium transported by being disposed so as to block the transport path. Alternatively, a recording medium detection apparatus comprising: a lever-like member that is pivotally displaced about its pivot axis when the contact is released; and a detection unit that detects the rotational displacement of the lever-like member. The lever-like member is provided so as to be rotatable in both the upstream direction and the downstream direction of the conveyance path around the rotation axis, and is in contact with the recording medium to be conveyed. It has a posture holding means for holding the posture of the lever-like member in the released state.

  According to the above aspect, the lever-like member is provided so that the lever-like member itself can be rotated in both the upstream direction and the downstream direction of the conveyance path around the rotation axis. Even when the user pulls out the recording medium from the upstream side of the transport path, the lever-like member can rotate in the upstream direction (the direction opposite to the original operation direction) accordingly. It is possible to prevent the lever-shaped member from being damaged due to a strong force applied to the lever-shaped member. Also, since the lever-like member itself pivots in both the upstream and downstream directions around the pivot axis, the lever-like member can be pivoted in both upstream and downstream directions by using a two-body structure. As in the case of this configuration, the accuracy of detecting the passage of the leading end or the trailing end of the recording medium is not lowered due to the component accuracy or the assembly accuracy, and the strength can be prevented from being lowered.

  Further, the lever-like member is provided so as to be rotatable in both the upstream side and the downstream side. However, when the contact with the recording medium to be transported is released, the posture is held by the posture holding means. Therefore, it is possible to prevent the rotation in the upstream direction or the downstream direction even though the contact with the recording medium is released, that is, it is possible to prevent erroneous detection. .

  According to a second aspect of the present invention, in the first aspect, the posture holding means biases the lever-shaped member in a direction in which the lever-shaped member rotates in the downstream direction of the conveyance path. A biasing force greater than that of the first biasing means for biasing the lever-shaped member in a direction in which the lever-shaped member rotates in the upstream direction of the transport path. An urging means is provided so as to be able to engage with a concavo-convex shape formed on a rotating surface of the lever-like member provided so as to be movable in the axial direction of the rotating shaft, and the conveying path of the lever-like member A restricting portion having an uneven shape that restricts the rotation of the lever-shaped member in the upstream direction and allows the lever-shaped member to rotate in the downstream direction of the conveying path, and the lever-shaped member faces the restricting portion. And a third biasing means for biasing To. According to this aspect, since the posture holding means includes the first to third urging means and the restricting unit, the posture holding means is configured with a simple structure and at a low cost. can do.

  According to a third aspect of the present invention, there is provided a recording apparatus including a recording head that performs recording on a recording medium. The recording apparatus according to the first or second aspect is provided in a conveyance path that conveys the recording medium. A recording medium detection device is provided. According to this aspect, the same effect as the first or second aspect can be obtained in the recording apparatus.

  According to a fourth aspect of the present invention, there is provided a liquid ejecting head that ejects liquid onto the ejection target medium, and a transport target that is disposed and transported while being disposed so as to block the transport path. A medium to be ejected comprising a lever-like member that rotates around a rotation axis when the contact with the medium is released, and detection means that detects the rotation displacement of the lever-like member. The lever-like member is provided so as to be rotatable in both the upstream direction and the downstream direction of the transport path around the rotation shaft. In addition, there is provided a posture holding means for holding the posture of the lever-like member in a state where the contact with the ejected medium to be conveyed is released.

  Hereinafter, an embodiment of the present invention will be described. In the following, first, the configuration of an ink jet printer (hereinafter abbreviated as “printer”) 1 as an example of “recording apparatus” and “liquid ejecting apparatus” according to an embodiment of the present invention will be outlined with reference to FIG. Here, FIG. 1 is a side sectional view of the paper conveyance path of the printer 1. In the following, the upstream side (right side in FIG. 1) of the paper transport path (sub-scanning direction) is simply referred to as “upstream side”, and the downstream side (left side in FIG. 1) of the paper transport path is simply referred to as “downstream side”. I will do it.

  The printer 1 includes a feeding device 2 that can set a plurality of recording sheets P as an example of “recording medium” and “jetting medium” in an inclined posture at the rear of the apparatus. The feeding device 2 includes a hopper 10, a feeding roller 11, an idle roller 14, a friction separating member 13, a return lever 12, and various other components than those exemplified above. The hopper 10 supports the recording paper P in an inclined posture, and is driven to swing by a cam mechanism (not shown) around the swinging fulcrum 10a so that the recording paper P is pressed against the feeding roller 11 and separated from the posture. The posture can be switched.

  The feeding roller 11 has a substantially D shape when viewed from the side, and a rubber material is wound around the outer periphery thereof. The feeding roller 11 is selectively rotated only when the paper is fed by a motor (not shown). At the time of paper feeding, the feeding roller 11 feeds the uppermost one of the recording paper P pressed against the feeding roller 11 by the arc portion to the downstream side, and when the paper feeding is finished, the downstream side conveyance drive roller In order to prevent a conveyance load from being generated during the sheet conveyance operation by the sheet 21, the drive control is performed so that the flat portion in a substantially D shape in a side view faces the friction separating member 13 as illustrated. Note that a roller indicated by reference numeral 14 is a freely rotatable idle roller, and is rotated in contact with the recording sheet P being conveyed so that the recording sheet P being conveyed does not contact the feeding roller 11 to cause a conveyance load. .

  A friction separating material 13 is provided at a position facing the feeding roller 11. The friction separating material 13 is pressed against the arc portion of the feeding roller 11 when the paper is fed to form a pressure contact, whereby the uppermost recording paper P to be fed and the next order to be fed multiple times. The subsequent recording paper P is separated. A paper return lever 12 is provided at a position facing the feed roller 11. The paper return lever 12 is provided so as to be able to swing around a swinging fulcrum 12a. During the one rotation operation of the feeding roller 11, the paper return lever 12 is temporarily set so as to open the feeding path of the recording paper P from the standby state shown in FIG. By falling and rising again as shown in FIG. 1, the next and subsequent recording sheets P about to be double fed are returned onto the hopper 10.

  The above is the feeding device 2. On the downstream side of the feeding device 2, a lever 15 as a “lever-like member” and a “detecting means” are provided between the feeding roller 11 and the transport driving roller 21. A paper detector 17 serving as a “recording medium (jetting medium) detection device” configured to include the detection unit 16 is provided. The lever 15 is provided so as to be pivotable in a clockwise direction and a counterclockwise direction with the pivot shaft 15a as a center, as viewed from the side of the sheet conveyance path, and the upper contact end 15b has a recording sheet to be fed. It is configured to be able to contact P.

  The detection unit 16 that detects the rotational displacement of the lever 15 is an optical sensor, and the contact end 15c extending downward from the rotation shaft 15a of the lever 15 enters the detection unit 16 as shown in the figure, thereby receiving light from the light emitting unit. The light traveling toward the part is blocked, and the non-passing state of the recording paper P is detected. When the lever 15 rotates with the passage of the recording paper P, the contact end 15c is disengaged from the detection unit 16, and thereby the passage of the leading edge of the recording paper P can be detected. Further, when the rear end of the recording paper P passes, the contact end 15c enters the detection unit 16 again, whereby the passage of the rear end of the recording paper P can be detected. The paper detector 17 will be described in detail later.

  Next, a conveyance driving roller 21 and a conveyance driven roller 22 are provided on the downstream side of the paper detector 17 (hereinafter, the roller pair is appropriately referred to as “conveyance roller”). The transport driving roller 21 is rotationally driven by a motor (not shown), and the transport driven roller 22 is pressed against the transport driving roller 21 and rotated. The recording paper P fed by the feeding roller 11 is nipped by the transport roller and transported under an ink jet recording head (hereinafter referred to as “recording head”) 26.

  A free-rotating guide roller 23 is provided at the downstream end of the transport driven roller holder 20 that pivotally supports the transport driven roller 22. The guide roller 23 is a roller for preventing the recording paper P from being lifted off the platen 28, so that the distance between the recording paper P and the recording head 14 is kept constant, so that the recording quality is reduced and the head is rubbed. To prevent.

  Next, the recording head 26 and the platen 28 are provided on the downstream side of the conveying roller so as to face each other. The recording head 26 is provided at the bottom of the carriage 25 and performs recording (printing) by ejecting (jetting) ink droplets as an example of liquid toward the recording paper P. The carriage 25 is driven in the main scanning direction by the power of a motor (not shown) while being guided in the main scanning direction by a carriage guide plate 27 extending in the main scanning direction.

  The platen 28 defines the gap between the recording paper P and the recording head 26 by supporting the recording paper P from below. A concave portion 28 a is formed on the surface of the platen 28 facing the recording head 26. This is for printing without margins on the recording paper P. When ink droplets are ejected to the edge of the recording paper P, ink droplets are ejected to the part off the recording paper P, Then, so-called borderless printing is performed by discarding into the concave portion 28a. An ink absorbing material 29 that absorbs ink droplets is disposed in the recess 28a. The ink droplets discarded in the recess 28a are discharged downward from a discharge hole (not shown), and a waste liquid tray 30 for receiving the discharged ink droplets is provided below the platen 28. A waste liquid absorber 31 is provided inside the waste liquid tray 30 to reliably hold the ink waste liquid in the waste liquid tray 30.

  On the downstream side of the recording head 26, a first discharge driving roller 36, a first discharge driven roller 37, a second discharge drive roller 38, and a second discharge driven roller 39 are provided. The first discharge drive roller 36 and the second discharge drive roller 38 are rotationally driven by a drive motor (not shown), and the first discharge driven roller 37 is driven to rotate in contact with the first discharge drive roller 36. The recording paper P on which recording has been performed is discharged toward a stacker (not shown) by being nipped by the first discharge driving roller 36 and the first discharge driven roller 37. Note that the second discharge driving roller 38 and the second discharge driven roller 39 ensure that the rear end of the recording paper P fed from the first discharge drive roller 36 and the first discharge driven roller 37 is directed toward a stacker (not shown). It fulfills the function of dropping.

  The above is the general configuration of the printer 1, and the paper detector 17 will be described in detail below with reference to FIGS. 2 is a perspective view of the paper detector 17, FIG. 3 is a side view thereof, FIGS. 4 and 5 are plan views of the paper detector 17 viewed from below, and FIG. FIG. 5 shows a state in which the lever 15 is rotated in the upstream direction, in a state where it is not in contact (a state where it is in a standing posture).

  As shown in FIGS. 2 and 3, the lever 15 includes a rotation shaft 15 a, a contact end 15 b on the upper side from the rotation shaft 15 a, a detected end 15 c on the lower side from the rotation shaft 15 a, A spring latching portion 15d for latching the tension coil spring 40 as "biasing means" and a spring latching portion 15e for latching the tension coil spring 41 as "second biasing means" are formed by resin molding. It is formed integrally (as a single body).

  The rotation shaft 15a is pivotally supported by a paper guide member 18 (FIG. 1) provided on the lower side of the paper conveyance path so that the lever 15 itself is located upstream from the side of the paper conveyance path. It is pivotally supported so as to be rotatable in both directions and downstream directions (details will be described later). The lever 15 rotating in the downstream direction means the rotation of the lever 15 when the contact end 15b rotates (falls) in the downstream direction as indicated by reference numeral 15b 'in FIG. The fact that 15 rotates in the upstream direction means that the lever 15 rotates when the contact end 15b rotates (falls down) in the upstream direction as indicated by reference numeral 15b ″ in FIG.

  The detected end 15c extends almost straight down from the rotating shaft 15a when the lever 15 is not in contact with the recording paper P, and the lower end of the detected end 15c is the detection unit 16 when the lever 15 is not in contact with the recording paper P. When the lever 15 enters and rotates in contact with the recording paper P, the lever 15 is detached from the detection unit 16.

  The spring latching portions 15d and 15e have a hook shape, the spring latching portion 15d is on the upstream side (right side in FIG. 3), and the spring latching portion 15e is on the downstream side (in FIG. 3). Left end) and one end of each of the tension coil springs 40 and 41 is hooked. When the other ends of the tension coil springs 41 and 41 are hooked on a spring hooking portion (not shown), and thereby the lever 15 contacts the recording paper P sent from the feeding device 2 and rotates downstream. (Reference numeral 15b ′ in FIG. 3), it rotates against the urging force of the tension coil spring 41.

  Further, when the recording paper P is pulled out from the upstream side during paper jam processing or the like and rotated upstream (reference numeral 15b ″ in FIG. 3), the recording paper P rotates against the urging force of the tension coil spring 40. Will move. That is, the tension coil spring 40 biases the lever 15 in the direction in which the lever 15 rotates in the downstream direction, and the tension coil spring 41 causes the lever 15 in the direction in which the lever 15 rotates in the upstream direction. Energize.

  As shown in FIG. 3, the contact end 15 b includes a contact surface A on which the leading edge of the recording paper P sent from the feeding device 2 (advanced from the upstream side to the downstream side) contacts, and a back surface of the recording paper P. A contacting surface (flat surface) B and a contact surface C with which the leading end of the recording paper P withdrawn from the upstream side during paper jam processing comes into contact have a substantially inverted L shape as shown. Is formed.

  Here, the contact end 15b does not extend straight upward from the rotation shaft 15a as shown in the drawing, but extends once obliquely upward toward the downstream side, and then extends almost straight upward, and its tip is downstream. By being bent toward the side, it is formed so as to form a substantially inverted L shape. That is, in the non-contact state with the recording paper P, the contact surface B is formed so as to be positioned on the downstream side with respect to the rotation shaft 15a, so that the swing angle of the lever 15 can be suppressed to be small. The arrangement space of the lever 15 can be reduced.

  In addition, since the contact surface A is provided so as to cross the paper conveyance path substantially perpendicularly, the lever 15 has almost the same timing regardless of which portion of the contact surface A the front end of the recording paper P contacts. Therefore, the passage timing of the leading edge of the recording paper P does not vary, and the passage of the recording paper P can be accurately detected.

  Furthermore, when the trailing edge of the recording paper P reaches the vicinity of the upstream side of the transport driving roller 21 (FIG. 1), the trailing edge of the recording paper P warps upward. The contact end 15b comes into contact with the rear end of the paper P from below, and a force that lifts the rear end of the recording paper P upward by the urging force of the tension coil spring 41 is applied to the rear end of the recording paper P. 15b is easily detached from the rear end of the recording paper P. However, since the top of the contact end 15b is formed by the contact surface B that is a flat surface, the surface of the lever 15 is stabilized by the surface contact with the recording paper P, and the rear end of the recording paper P passes. In addition, the contact end 15b does not come off at an inappropriate position, and the passage of the rear end of the recording paper P can be accurately detected.

In addition, since the contact end 15b is formed in a substantially inverted L shape so that the tip thereof faces the downstream side, the force component applied to the recording paper P is further directed in a direction perpendicular to the paper transport path. As a result, the contact end 15b is further unlikely to come off from the rear end of the recording paper P, and it is possible to more accurately detect the passage of the rear end of the recording paper P by such an effect.
In addition, in this embodiment, since the lever 15 is provided so as to protrude upward from the bottom of the paper transport path, the contact end 15b comes into contact with the back surface of the recording paper P, thereby the recording surface. It will not damage you.

  Next, the posture holding means 17 for holding the lever 15 in the standing posture (the posture shown in FIG. 3) will be described. As shown in FIGS. 4 and 5, the rotation shaft 15 a of the lever 15 is provided with a stopper 46 and a restricting portion 45 so as to sandwich the lever 15. The stopper 46 and the restricting portion 45 are fixedly provided on a frame member (not shown) so that the rotation shaft 15a passes through and the lever 15 does not rotate even if the lever 15 rotates.

  Between the stopper 46 and the restricting portion 45, the lever 15 is movable in the axial direction of the rotating shaft 15a (the left and right direction in FIGS. 4 and 5), and further between the stopper 46 and the lever 15 is compressed. A spring 42 is provided so that the rotation surface D of the lever 15 is in pressure contact with the restricting portion 45.

  In the lever 15, a stepped portion 15 f as an “uneven shape” is formed on the rotating surface D, and on the side facing the rotating surface D in the restricting portion 45, an “uneven shape” that just fits the stepped portion 15 f. As shown in FIG. The fitting shape of the step portion 15f and the step portion 45a is an uneven shape that restricts the rotation of the lever 15 in the upstream direction and permits the rotation in the downstream direction, that is, the lever 15 is downstream. When the lever 15 is rotated in the lateral direction, the lever 15 does not receive a regulating force from the regulating portion 45. However, when the lever 15 is pivoted in the upstream direction, the biasing force of the compression spring 42 is applied as shown in FIG. On the other hand, since the step portion 15f needs to climb over the slope of the step portion 45a, the lever 15 receives a restriction (predetermined force) from the restriction portion 45 when rotating in the upstream direction.

  Note that the urging force of the tension coil spring 41 is set to be larger than the urging force of the tension coil spring 40, whereby the fitting state between the step portion 15f and the step portion 45a as shown in FIG. It is held, that is, the standing posture of the lever 15 is held. As described above, the tension coil springs 40 and 41, the compression spring 42, and the restricting portion 45 constitute the posture holding means 47 that holds the posture of the lever 15.

  In the paper detector 17 configured as described above, as described above, the lever 15 is provided so as to be rotatable in both the upstream direction and the downstream direction of the sheet conveyance path around the rotation shaft 15a. Therefore, even when the user pulls out the recording paper P from the upstream side during the jam processing, the lever 15 can rotate in the upstream direction (the direction opposite to the original operation direction) accordingly. It is possible to prevent the lever 15 from being damaged due to a strong force applied to the lever 15.

  In addition, since the lever 15 itself rotates in both the upstream and downstream directions around the rotation shaft 15a, the lever 15 can be rotated in both the upstream and downstream directions by using a two-body structure. As in the case of the configuration, the accuracy of detecting the passage of the leading end or the trailing end of the recording paper P is not lowered due to the component accuracy or the assembly accuracy, and the strength can be prevented from being lowered. In particular, since the recording paper P can be positioned with high precision, when performing borderless printing at the start and end of the recording paper P, the discard amount of the image at the start and end can be extremely reduced. .

  Further, the lever 15 is provided so as to be rotatable in both the upstream side and the downstream side. However, when the contact with the recording paper P being conveyed is released, the posture is held by the posture holding means 47. Therefore, even if it is rotated in either the upstream side or the downstream side, it returns to the standing posture shown in FIG. 3, and the upstream is in spite of the state that the contact with the recording paper P is released. It is possible to prevent rotation in the lateral direction or downstream direction, that is, it is possible to prevent erroneous detection of the passage of the leading edge or the trailing edge of the recording paper P.

FIG. 3 is a side sectional view of a paper conveyance path of the printer according to the present invention. The perspective view of the paper detector which concerns on this invention. Side view of a paper detector according to the present invention The top view which looked at the paper detector which concerns on this invention from the bottom. The top view which looked at the paper detector which concerns on this invention from the bottom.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inkjet printer, 2 Feeding device, 10 Hopper, 11 Feed roller, 12 Paper return lever, 13 Friction separation material, 14 Idle roller, 15 Lever, 15a Rotating shaft, 15b Contact end, 15c Detected end, 15d, 15e Spring latching part, 15f Step part, 16 detection part, 17 paper detector, 20 transport driven roller holder, 21 transport drive roller, 22 transport driven roller, 23 guide roller, 25 carriage, 26 recording head, 27 carriage guide plate , 28 Platen, 29 Ink absorber, 30 Waste tray, 31 Waste absorber, 33 Frame, 36 First discharge drive roller, 37 First discharge driven roller, 38 Second discharge drive roller, 39 Second discharge driven roller, 40 41 Spring coil spring, 42 Compression spring, 45 Regulator, 45a Step 46 Stopper, P Recording paper

Claims (2)

It is provided in a transport path for transporting the recording medium, and is placed around the transport path so as to contact or be released from contact with the recording medium transported. A recording medium detection apparatus comprising: a lever-like member that is dynamically displaced; and a detection unit that detects rotational displacement of the lever-like member.
The lever-like member is provided so as to be rotatable in both directions upstream and downstream of the conveyance path around the rotation axis, and contact with the recording medium being conveyed is released. has a posture holding means for holding the posture of the lever-shaped member of the state,
The posture holding means is a first urging means for urging the lever-like member in a direction in which the lever-like member rotates in the downstream direction of the transport path;
A second urging unit that urges the lever-shaped member in a direction in which the lever-shaped member rotates in the upstream direction of the transport path and has a larger urging force than the first urging unit;
A restricting portion having a step portion engageable with a step portion formed on a turning surface of the lever-like member provided movably in the axial direction of the turning shaft;
A third urging means for urging the lever-shaped member toward the restricting portion,
The step formed on the lever-shaped member and the step formed on the restricting portion are formed on the lever-shaped member when the lever-shaped member rotates in the downstream direction of the conveyance path. When the lever is separated from the step portion formed in the restricting portion and the lever-like member rotates in the upstream direction of the transport path, the step portion formed in the lever-like member is formed in the restricting portion. Is a positional relationship overcoming the stepped portion against the biasing force of the third biasing means,
A recording medium detection apparatus characterized by the above. A recording apparatus comprising a recording head for recording on a recording medium, wherein the recording medium detection apparatus according to claim 1 is provided in a conveyance path for conveying the recording medium.
A recording apparatus.

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