Patent Grant
11148439
The present invention relates to an image recording device configured to record an image on a recording sheet, and particularly to an image recording device comprising a plurality of trays arranged vertically one above another.
A known image recording device comprises a first guide member attached to a main body of the image recording device, a second guide member positioned outside the first guide member, and a third guide member positioned outside the second guide member. The first guide member and the second guide member define a U-shaped first path through which a sheet is guided from an upper tray to a recording unit. The second guide member and the third guide member define a U-shaped second path through which a sheet is guided from a lower tray to the recording unit.
The first guide member, second guide member, and third guide member are arranged horizontally side by side, and the second guide member positioned between the first guide member and the third guide member separates the first guide path from the second guide path. Thus, the size of the image recording device may increase horizontally.
Therefore, an object of the invention is to provide an image recording device comprising a plurality of trays arranged vertically one above another while preventing an increase in size of the image recording device horizontally. A technical advantage of the invention is that a sheet is selectively fed from the plurality of the trays to a recording unit while being guided by a relatively small number of members.
According to an embodiment of the invention, an image recording device comprises a first tray, a second tray, a recording unit, a first feeder, a second feeder, an inner member, and an outer member. The first tray comprises a first bottom plate configured to hold thereon a first sheet, and a standing plate extending upward from a downstream end portion, in a feed direction, of the first bottom plate. The second tray is disposed below the first tray and comprises a second bottom plate configured to hold thereon a second sheet. The recording unit is configured to record an image selectively on the first sheet and the second sheet. The first feeder is configured to contact a first surface of the first sheet held on the first bottom plate and to feed the first sheet toward the recording unit in the feed direction. The second feeder is configured to contact a first surface of the second sheet held on the second bottom plate and to feed the second sheet toward the recording unit in the feed direction. The inner member is disposed above the standing plate of the first tray. The outer member comprises an upstream portion opposing the inclined plate, and a downstream portion disposed downstream, in the feed direction, of the upstream portion and opposing the inner member. The inner member is configured to guide the first surface of the first sheet fed by the first feeder and the first surface of the second sheet fed by the second feeder. The standing plate is configured to guide the first surface of the second sheet fed by the second feeder. The upstream portion of the outer member is configured to guide a second surface of the second sheet fed by the second feeder, and the downstream portion of the outer member is configured to guide a second surface of the first sheet fed by the first feeder and the second surface of the second sheet fed by the second feeder. The standing plate of the first tray is configured to move relative to the outer member.
Other objects, features, and advantages will be apparent to persons of ordinary skill in the art from the following detailed description of the invention and the accompanying drawings.
For a more complete understanding of the invention, the needs satisfied thereby, and the features and technical advantages thereof, reference now is made to the following descriptions taken in connection with the accompanying drawings.
Embodiments of the invention and their features and technical advantages may be understood by referring to
In the following description, an up-down direction 7 is defined in relation to a multi-function device 10 disposed in an orientation in which it is intended to be used (i.e., disposed in a state shown in
As shown in
An opening (not shown) is formed on the front side of the printer 11. A first tray 22 (see
Recording sheets 50 are placed in the trays 21 and 22 (see
The multi-function device 10 is used while being connected to an external information equipment (not shown), such as a computer. The printer 11 records an image on the recording sheet 50 in accordance with print data received from the external information equipment or image data of an original document read by the scanner 12.
As shown in
The trays 21 and 22 are configured to be inserted in and removed from the printer 11. That is, the trays 21 and 22 are movable toward and away from the printer 11. As described above, the opening is formed on the front side of the printer 11. As shown in
The first tray 22 comprises a first bottom plate 70, a left side plate, a right side plate 71, and a standing plate, e.g., a first inclined plate 24. The recording sheet 50 is placed on the first bottom plate 70. The left side plate (not shown) and the right side plate 71 extend upright at both ends in the left-right direction of the first bottom plate 70. The first inclined plate 24 extends upward from a rear end portion of the first bottom plate 70, i.e., a downstream end portion of the recording sheet 50 in a feeding direction. The second tray 21 comprises a second bottom plate 80, a left side plate, a right side plate 81 and a second inclined plate 34. The recording sheet 50 is placed on the second bottom plate 80. The left side plate (not shown) and the right side plate 81 extend upright at both ends in the left-right direction of the second bottom plate 80. The second inclined plate 34 extends upward at a rear end portion of the second bottom plate 80. Thus, each of the trays 21 and 22 is shaped into substantially a box that opens upwardly.
The inclined plates 24 and 34 are inclined to facilitate smooth feeding of the recording sheet 50. In particular, each of the inclined plates 24 and 34 is inclined with respect to a corresponding one of the first and second bottom plates 70 and 80 such that the upper end of the inclined plate is located further rearward than the lower end (i.e., further downstream than the lower end in the feeding direction). An angle between the first inclined plate 24 and a surface of the first bottom plate 70 is determined such that the recording sheet 50 placed on the first bottom plate 70 is smoothly fed by a first feeder to a first path 18 while being guided by the first inclined plate 24. An angle between the second inclined plate 34 and a surface of the second bottom plate 80 is determined such that the recording sheet 50 placed on the second bottom plate 80 is smoothly fed by a second feeder 38 to a second path 17 while being guided by the second inclined plate 34.
As shown in
The first feeder 28 comprises a feed roller 25, an arm 26, and a shaft 27. The feed roller 25 feeds the recording sheet 50 placed in the first tray 22 one at a time to the first path 18. The feed roller 25 feeds the recording sheet 50 toward the recording unit 40. That is, the feed roller 25 feeds the recording sheet 50 in a feeding direction, i.e., from the front toward the rear. The feed roller 25 is rotatably provided at a distal end of the arm 26. In particular, as the feed roller 25 is rotated while being pressed against the recording sheet 50, the uppermost recording sheet 50 is fed toward the first inclined plate 24 with frictional force between a roller surface of the feed roller 25 and the recording sheet 50. The recording sheet 50 is guided upward with a leading edge in the feeding direction thereof being in contact with the first inclined plate 24, fed to the first path 18 and caused to pass through the first path 18. The first inclined plate 24 supports the recording sheet 50 fed from the first tray 22. The arm 26 is pivotably provided on the shaft 27 which is supported by a housing of the printer 11. The arm 26 is pivotably urged toward the first tray 22 due to the self weight or by elastic force of, for example, a spring.
The second path 17 is formed above the second inclined plate 34 of the second tray 21 and between the outer member the outer member 51 and the first inclined plate 24. As shown by a dashed line in
The second feeder 38 comprises a feed roller 35, an arm 36, and a shaft 37. The feed roller 35 feeds the recording sheet 50 placed in the second tray 21 one at a time to the second path 17. The feed roller 35 feeds the recording sheet 50 toward the recording unit 40. That is, the feed roller 25 feeds the recording sheet 50 in the feeding direction. The feed roller 35 is rotatably provided at a distal end of the arm 36. In particular, as the feed roller 35 is rotated while being pressed against the recording sheet 50, the uppermost recording sheet 50 is fed toward the second inclined plate 34 with frictional force between a roller surface of the feed roller 35 and the recording sheet 50. The recording sheet 50 is guided upward with a leading edge in the feeding direction thereof being in contact with the second inclined plate 34, fed to the second path 17 and caused to pass through the second path 17. The arm 36 is pivotably provided on the shaft 37 which is supported by the housing of the printer 11. The arm 36 is pivotably urged toward the second tray 21 due to the self weight or by elastic force of, for example, a spring.
As shown in
As shown in
As shown in
A discharge roller pair 64 is located on the downstream side of the recording unit 40 in the conveying direction 6 of the recording sheet 50. The discharge roller pair 64 comprises a sheet discharge roller 62 and a spur 63. The sheet discharge roller 62 is disposed below the discharging path 19 and is driven to rotate by the conveying motor. The spur 63 is rotatably disposed above the sheet discharge roller 62 via the discharging path 19 and is urged against the sheet discharge roller 62 by a spring.
As shown in
The convey roller pair 59, the discharge roller pair 64, and the intermediate roller pair 56 nip the recording sheet 50 and convey the same along the paths 18 and 19.
The recording sheet 50 is fed, in the feeding direction, by the first feeder 28 from the first tray 22 or fed by the second feeder 38 from the second tray 21. The recording sheet 50 is then conveyed, in the conveying direction 6, by the intermediate roller 58 and the driven roller 57, and the convey roller pair 59 so as to make a U-turn and reach the recording unit 40. The recording sheet 50 is then discharged to the upper surface 23 of the first tray 22 by the discharge roller pair 64. The recording sheet 50 is conveyed from the first tray 22 or the second tray 21, via the recording unit 40, to the first tray 22 in a feed direction, e.g., the feeding direction as described above and the conveying direction 6, that is curved in a substantially U-shape.
As shown in
The inner member 52 is fixed, for example, to a frame of the printer 11 at a position above the first inclined plate 24 of the first tray 22. The inner member 52 extends, along the first path 18, from a position near and above the first inclined plate 24 to a position behind the convey roller pair 59. A surface of the inner member 52 bordering the first path 18 is formed as a substantially circular arc whose center is located on an inner side of the printer 11. The inner member 52 extends in the left-right direction 9 (i.e., in a direction perpendicular to a sheet plane of
The outer member 51 extends from a position near and above the second inclined plate 34 to a position behind the convey roller pair 59, via a position near and above the first inclined plate 24. A surface of the outer member 51 opposing the inner member 52 is formed as a substantially circular arc whose center is located on an inner side of the printer 11. An upstream portion of the outer member 51 in the conveying direction 6 from the circular arc extends substantially vertically. The outer member 51 extends in the left-right direction 9 (i.e., in a direction perpendicular to a sheet plane of
The upstream portion of the outer member 51, which extends between a position near and above the second inclined plate 34 and a position near and above the first inclined plate 24, opposes the first inclined plate 24 of the first tray 22. A downstream portion of the outer member 51, which has the circular arc shape, opposes the inner member 52. In other words, the outer member 51 extends from a lower position opposing the first inclined plate 24 to an upper position opposing the inner member 52. Thus, the second path 17 is defined by the outer member 51 and the first inclined plate 24 which oppose each other at a predetermined distance. The recording sheet 50 fed from the second tray 21 is conveyed through the second path 17 which is formed between the outer member 51 and the first inclined plate 24. Since the second path 17 is defined by the first inclined plate 24 and the outer member 51, and the first path 18 is defined by the inner member 52 disposed above the first inclined plate 24 and the outer member 51, the first path 18 and the second path 17 merge with each other. That is, the recording sheet 50 conveyed through the second path 17 to a position above the first incline plate 24 is then conveyed through the first path 18.
The first feeder 28 feeds the recording sheet 50 from the first tray 22 while contacting a first surface of the recording sheet 50. The inner member 52 is configured to guide the first surface of the recording sheet 50 fed by the first feeder 28. The downstream portion of the outer member 51 is configured to guide a second surface of the recording sheet 50 fed by the first feeder 38. The second surface of the recording sheet 50 is opposite to the first surface.
The second feeder 38 feeds the recording sheet 50 from the second tray 21 while contacting a first surface of the recording sheet 50. The inner member 52 is configured to guide the first surface of the recording sheet 50 fed by the second feeder 38. The first inclined plate 24 is configured to guide the first surface of the recording sheet 50 fed by the second feeder 38. The upstream portion of the outer member 51 is configured to guide a second surface of the recording sheet 50 fed by the second feeder 38. The second surface of the recording sheet 50 is opposite to the first surface. The downstream portion of the outer member 51 is configured to guide the second surface of the recording sheet 50 fed, between the inclined plate 24 and the upstream portion of the outer member 51, by the second feeder 38.
The outer member 51 is pivotable in a direction of an arrow 54 about a shaft 53 which extends in the left-right direction 9 (i.e., in a direction perpendicular to a sheet plane of
Although not shown, the second tray 21 comprises side guides for guiding the left and right edges of the recording sheet 50, and the recording sheet 50 is fed toward the recording unit 40 while being center-aligned in the left-right direction 9. As shown in
When the first tray 22 is drawn out of the printer 11 and removed from the opening, the projecting plates 73 and 74 project from the rear surface of the first inclined plate 24. Thus, in the event that a user accidentally drops the first tray 22, the projecting plates 73 and 74 may collide with other objects, thereby reducing the possibility of damaging a surface of the first inclined plate 24 which defines the second path 17. The projecting plates 73 and 74 function as members to prevent damages to the first inclined plate 24.
Although the present embodiment is described with reference to the structure in which the projecting plates 73 and 74 function as the guide members and as the damage preventing members, the present invention is not limited thereto. The first inclined plate 24 may be provided in the printer 11 but not in the first tray 22. In this case, the projecting plates 73 and 74 of the first inclined plate 24 simply functions as guide members which guide the recording sheet 50 along the first path 18.
As shown in
A plurality of ribs 55 are provided on an inner surface of the outer member 51. The ribs 55 are arranged at predetermined intervals in the left-right direction 9, and project toward the first inclined plate 24 and the inner member 52, and extend along the conveying direction 6. The ribs 55 project to a height that allows the recording sheet 50 to pass between the outer member 51 and the first inclined plate 24 and between the outer member 51 and the inner member 52.
The heights of the ribs 75 increase from the upstream side toward the downstream side in the conveying direction 6, i.e., from the lower side toward the upper side in the vertical direction 7. In addition, the heights of the ribs 55 from the outer member 51 increase from the upstream side toward the downstream side, i.e., from the lower side toward the upper side in the vertical direction 7. Accordingly, the distance between the ribs 55 on the outer member 51 and the ribs 75 on the first inclined plate 24 decreases from the upstream side toward the downstream side in the conveying direction 6. The ribs 55 and the ribs 75 are arranged at different positions in the left-right direction 9.
The printer 11, which comprises the first tray 22 and the second tray 21, requires two paths (i.e., the first path 18 and the second path 17). An outer side of the second path 17 is defined by the outer member 51, and an inner side of the second path 17 is defined by the first inclined plate 24. That is, according to the embodiment described above, since the inner side of the second path 17 is defined by the first inclined plate 24, it is not necessary to provide an additional member by which the inner side of the second path 17 is defined. Accordingly, an increase in size of the multi-function device 10 can be avoided even when the printer 11 has a plurality of vertically stacked trays 21 and 22.
The ribs 75 provided in the first inclined plate 24 reduce the contact area between the recording sheet 50 and the first inclined plate 24. Thus, the recording sheet 50 can be conveyed smoothly along the second path 17. In addition, the ribs 55 provided in the outer member 51 assist smooth conveyance of the recording sheet 50 along the second path 17.
The leading edge of the recording sheet 50 is likely to flap as it moves away from the feeders 28 and 38. Thus, the recording sheet 50 fed from the second tray 21 is like to flap in the downstream side of the second path 17 in the conveying direction 6. On the contrary, the recording sheet 50 is conveyed more stably in the upstream side than in the downstream side of the second path 17. According to the embodiment described above, the distance between the outer member 51 and the ribs 75 decreases toward the downstream side of the second path 17 in the conveying direction 6. That is, the second path 17 is narrowed in the downstream side. This structure prevents flapping of the recording sheet 50 in the downstream side and allows a stable conveyance of the recording sheet 5.
The projecting plates 73 and 74, which guide, in the width direction, the recording sheet 50 fed from the second tray 21, are formed on a rear surface of the first inclined plate 24, i.e., a surface of the first inclined plate 24 defining the second path 17. Thus, the recording sheet 50 is conveyed even more stably.
Since the outer member 51 is configured to move between different positions, the recording sheet 50, if jammed in the first path 18 or the second path 17, can be removed easily.
The first tray 22 is configured to be inserted in and removed from the printer 11. Thus, even if a paper jam of the recording sheet 50 occurs in the paths 17 and 18, the recording sheet 50 can be removed even more easily by changing the position of the outer member 51 to expose the paths 17 and 18 and by removing the first tray 22.
The projecting plates 73 and 74 are provided to project from the first inclined plate 24 toward the outer member 51. With this structure, in the event that, for example, the first tray 22 is accidentally dropped to the ground, the projecting plates 73 and 74 collide with the ground and the first inclined plate 24 is unlikely to contact with the ground. Thus, the first inclined plate 24 is unlikely to be damaged. Accordingly, when the first tray 22 is inserted in the printer 11, the recording sheet 50 is guided smoothly by the flawless first inclined plate 24.
The arrangement and shape of the ribs 55 and the ribs 75 are not limited to those of the embodiment described above. In particular, one of the ribs 55 and the ribs 75 may be constant in height in both the upstream and downstream sides in the conveying direction 6, and the other may increase in height toward the downstream side. The ribs 55 and the ribs 75 may be formed in the same positions in the left-right direction 9. Alternatively, the ribs 55 and the ribs 75 may be omitted.
The present invention may be implemented in a multi-function device 10 configured to perform double-sided image recording. According to another embodiment of the invention, a printer 11 of the multi-function device 10 capable of double-sided image recording may comprise a return path 90, as shown in
The printer 11 comprises a path switching unit 97 and a return roller pair 65 which guide the recording sheet 50 from the discharging path 19 to the return path 90. The path switching unit 97 is disposed on the downstream side of the discharge roller pair 64 in the conveying direction. The return roller pair 65 is disposed on the downstream side of the path switching unit 97 in the conveying direction. A driving roller 66, which is one of the return roller pair 65, is configured to rotate in the forward and reverse directions so as to convey the recording sheet 50 in the conveying direction and a direction opposite thereto.
The path switching unit 97 is pivotable about a shaft 98 between a discharge position (i.e., a position shown in
In a normal state, the path switching unit 97 pivots downward due to the self weight and is kept in the return position. In this state, when a leading edge of the recording sheet 50 which has passed below the recording unit 40 reaches the path switching unit 97, the path switching unit 97 is pressed upward by an upper surface of the recording sheet 50 and changes from the return position to the discharge position. In this state, the recording sheet 50 further conveyed is pinched by the return roller pair 65 disposed on the downstream side in the conveying direction. As the driving roller 66 rotates in the forward direction while the path switching unit 41 is kept at the discharge position, the recording sheet 50 is conveyed toward the output tray 23. When a trailing edge of the recording sheet 50 reaches a predetermined position upstream of the auxiliary roller 101, force of the path switching unit 97 to pivot to the return position due to the self weight becomes greater than force of the recording sheet 50 to press the path switching unit 97 upward. Thus, the path switching unit 97 pivots from the discharge position to the return position. In this manner, the trailing edge of the recording sheet 50 is pressed downward by the auxiliary roller 101 and thus directed toward the return path 90.
For single-sided recording, the driving roller 66 continuously rotates in the forward direction and then the recording sheet 50 is discharged to the output tray 23. For double-sided recording, the rotational direction of the driving roller 66 is switched from the forward direction to the reverse direction in the state in which the trailing edge of the recording sheet 50 is directed toward the return path 90. In this manner, the recording sheet 50 is switched back to the return path 90.
An inner member 52 and an upper member 93 define the return path 90. The inner member 52 is a plate member positioned above the first tray 22 and extending in a left-right direction 9 and a front-rear direction 8. The inner member 52 is curved upward at a rear end thereof. That is, the inner member 52 comprises a main body 46 and an end portion 47. The main body 46 extends in the left-right direction 9 and the front-rear direction 8 at a position above the first tray 22. The end portion 47 extends in the left-right direction 9 and the vertical direction 7 at a rear end of the inner member 52. The main body 46 opposes the upper member 93. The main body 46 and the upper member 93 define the return path 90. The end portion 47 opposes the outer member 51. The end portion 47 and the outer member 51 define the first path 18.
The upper member 93 is disposed between the recording unit 40 and the inner member 52. That is, the opposite member 93 opposes the inner member 52 from above, and the inner member 52 and the opposite member 93 define the return path 90. The upper member 93 opposes the recording unit 40 from below, and the upper member 93 and the recording unit 40 define the discharging path 19. The outer member 51 opposes a downstream end of the upper member 93 in the return direction. In other word, the outer member 51 opposes an upstream portion of the upper member 93, and the upstream portion is positioned upstream from the recording unit 40 in the conveying direction 40. The upper member 93 and the outer member 51 define a third path 94. The outer member 51 is configured to guide the first surface of the recording sheet 50 while the upper member 93 is configured to guide the second surface of the recording sheet 50.
As described above, unlike the foregoing embodiment depicted in
As shown in
The inner member 52 pivots into an upper position when the lower surface 95 contacts the first tray 22 (see
In this embodiment, the inner member 52 defines the return path 90 while defining the first path 90. This configuration reduces the size of the multi-function device 10 as compared with a case in which the return path 90 is defined by an additional member provided separately from the inner member 52.
In the event that the recording sheet 50 is jammed, for example, by being caught in the return path 90, the return path 90 can be exposed by retracting the first tray and by moving the outer member 51 into the open position, thereby facilitating handling of the recording sheet 50. That is, even if the recording sheet 50 is jammed in the return path 90, the recording sheet 50 can be readily removed.
In the embodiment depicted in
In the embodiment depicted in
In the embodiment depicted in
In the embodiment depicted in
In the embodiment depicted in
While the invention has been described in connection with embodiments of the invention, it will be understood by those skilled in the art that variations and modifications of the embodiments described above may be made without departing from the scope of the invention. Other embodiments will be apparent to those skilled in the art from a consideration of the specification or practice of the invention disclosed herein. It is intended that the specification and the described examples are considered merely as exemplary of the invention, with the true scope of the invention being defined by the following claims.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2010-137854 | Jun 2010 | JP | national |
The present application is a continuation of U.S. patent application Ser. No. 16/167,992, which was filed on Oct. 23, 2018, which is a continuation of U.S. patent application Ser. No. 15/867,815, which was filed on Jan. 11, 2018, which is a continuation of U.S. patent application Ser. No. 15/435,447, which was filed on Feb. 17, 2017, now U.S. Pat. No. 9,884,492 B2, which issued on Feb. 6, 2018, which is a continuation of U.S. patent application Ser. No. 14/997,188, which was filed on Jan. 15, 2016, now U.S. Pat. No. 9,604,473 B2, which issued on Mar. 28, 2017, which is a continuation of U.S. patent application Ser. No. 14/792,287, which was filed on Jul. 6, 2015, now U.S. Pat. No. 9,254,691 B2, which issued on Feb. 9, 2016, which is a continuation of U.S. patent application Ser. No. 14/586,807, which was filed on Dec. 30, 2014, now U.S. Pat. No. 9,096,400 B2, which was issued on Aug. 4, 2015, which is a continuation of U.S. patent application Ser. No. 14/015,651, which was filed on Aug. 30, 2013, now U.S. Pat. No. 8,937,755 B2, which was issued on Jan. 20, 2015, which is a continuation of U.S. patent application Ser. No. 13/072,755, which was filed on Mar. 27, 2011, now U.S. Pat. No. 8,526,081 B2, which was issued on Sep. 3, 2013, which claims priority from Japanese Patent Application Publication No. 2010-137854, which was filed on Jun. 17, 2010, the disclosures of which are incorporated herein by reference in their entirety.
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| Number | Date | Country | |
|---|---|---|---|
| 20200331277 A1 | Oct 2020 | US |
| Number | Date | Country | |
|---|---|---|---|
| Parent | 16167992 | Oct 2018 | US |
| Child | 16809826 | US | |
| Parent | 15867815 | Jan 2018 | US |
| Child | 16167992 | US | |
| Parent | 15435447 | Feb 2017 | US |
| Child | 15867815 | US | |
| Parent | 14997188 | Jan 2016 | US |
| Child | 15435447 | US | |
| Parent | 14792287 | Jul 2015 | US |
| Child | 14997188 | US | |
| Parent | 14586807 | Dec 2014 | US |
| Child | 14792287 | US | |
| Parent | 14015651 | Aug 2013 | US |
| Child | 14586807 | US | |
| Parent | 13072755 | Mar 2011 | US |
| Child | 14015651 | US |
