Structure for preventing too deep paper placement of ink-jet printer

Abstract

A structure for preventing too deep paper placement of an ink-jet printer comprises a loading platform which is arranged in the printer and provided with a paper placement space for accommodating paper; an aligning part which can pivot to an aligning position for blocking and aligning the front end of the paper on the loading table, and can pivot to a conveying allowing position for allowing the paper to be conveyed; the bracket is arranged on the outer side of the paper placing space; the main gear is pivotally connected to the bracket; the driving source transmits power to the main gear through a gear transmission structure meshed with the main gear; the swinging arm is fixedly connected to the main gear and can rotate around the axis which is the same as the rotation axis of the main gear; the double-end hinge is connected with the swinging arm and the aligning part; and the control part can control the swing arm, the double-end hinge and the alignment part to form / release a fixed connection state, and the connection state can enable the alignment part to prevent the paper from entering the paper placing space in a manner of exceeding a preset degree.

Description

Technical Field

[0001] The utility model relates to the technical field of inkjet printers, in particular to a structure for preventing an inkjet printer from placing paper too deep. Background Art

[0002] When adding paper to a printer with an L-shaped paper feed, the problem of inserting the paper too deep is easy to occur. That is, the paper is inserted too deep into the paper slot, and the bottom of the paper has been bent on the paper separation structure or even touched the paper feed sensor, resulting in an error message. In such cases, the printer is prone to re-feeding or paper jams when printing. To solve this problem, there are solutions in the prior art such as Figures 15 to 21 As shown, the paper feed motor 4' is connected to and drives the baffle structure through a paper path transmission structure composed of gears and transmission rods. Specifically, the baffle structure consists of a rod-shaped baffle 1a' and a baffle arm 1b' fixedly connected to its end. The connection point is marked as K'. The side of the rod body of the baffle 1a' has a paper baffle arm 11a' for supporting the paper. The baffle 1a' and the baffle arm 1b' rotate synchronously coaxially with the axis of the end of the baffle 1a'. The angle formed by the projection of 11a' and 1b' is marked as α, and this angle remains unchanged. The schematic diagram of its decomposition structure is shown in FIG. Figure 19 The hinge point between the retaining bar arm 1b' and the retaining bar hinge 11b' is M', and the other end of the retaining bar hinge 11b' is hinged to the arm support 2', and the hinge point is recorded as N'. The arm support 2' is set on the main gear 3' and rotates coaxially with the curvature center L' of the main gear 3'. The paper feed motor 4' drives the main gear 3' through the paper path transmission structure to rotate the arm support 2', thereby driving the retaining bar hinge 11b' and the retaining bar 1a' to rotate, so that the retaining bar 1a' and the paper retaining arm 11a' rotate to be able to support the front end of the paper 5'. The side view of the dead point state is shown in FIG. Figure 17 , simplified model such as Figure 20 As shown, the paper feed motor 4' drives the baffle structure to rotate, so that the baffle 1a'-baffle arm 1b'-baffle hinge 11b'-arm support 2' is in a dead point state, and the force of the baffle hinge 11b' on the arm support 2' points to the curvature center L' of the arm support 2'. When the user puts paper, the force 1A' of the bottom of the paper 5' on the baffle 1a' will be converted into a force 1B' of the baffle hinge 11b' on the arm support 2', and its direction points to the curvature center L' of the arm support 2', which cannot drive the arm support to rotate, thereby preventing the paper from being placed too deep. However, since this state is a static dead point state, as shown in FIG. Figure 18 and simplified models Figure 21As shown, if the user inserts and removes paper 5' from the paper slot multiple times or uses too much force to insert paper 5', the bottom of the paper 5' will collide with the stop bar 1a'. At this time, the angle α remains unchanged, while the relative positions of the stop bar 1a', the stop bar arm 1b', the stop bar hinge 11b', and the arm support 2' change, thereby destroying the previous static dead point state. That is, the force of the bottom of the paper 5' on the stop bar 1a' is converted into the force 2B' of the stop bar hinge 11b' on the arm support 2', but it does not point to the center of curvature L' of the rotation of the arm support 2'. The arm support 2' regains the freedom of rotation. At this time, the stop bar arm 1b' and the stop bar 1a' also rotate synchronously, causing the paper stop arm 11a' to be pressed down and rotated in the direction of 2A', thereby rendering the paper stop arm 11a' ineffective in resisting the paper, that is, rendering the function of preventing the paper from being placed too deep ineffective. In order to avoid this situation, improvements are needed. Utility Model Content

[0003] The technical problem to be solved by the present invention is to provide a structure which can stably and controllably prevent the paper from being placed too deep when the inkjet printer is working, in view of the above-mentioned existing technical status.

[0004] The technical solution adopted by the present invention to solve the above technical problems is: the structure of the inkjet printer to prevent the paper from being placed too deep includes:

[0005] The loading platform is provided in the printer and has a paper placement space for accommodating paper;

[0006] an aligning portion capable of pivoting to an aligning position for blocking and aligning a leading end of a sheet of paper positioned on the loading table, and capable of pivoting to a conveyance allowing position for allowing the sheet of paper to be conveyed;

[0007] A bracket is arranged outside the paper placement space;

[0008] a main gear pivotally connected to the bracket;

[0009] a driving source for transmitting power to the main gear via a gear transmission structure meshing with the main gear;

[0010] a swing arm, fixedly connected to the main gear and capable of rotating about the same axis as the rotation axis of the main gear;

[0011] a double-ended hinge connecting the swing arm and the alignment portion;

[0012] It is characterized in that it also has a control part that can control the formation / release of the fixed connection state between the swing arm, the double-headed hinge and the alignment part, and the connection state can always enable the alignment part to prevent the paper from entering the paper placement space beyond a preset degree.

[0013] As a construction method of the double-headed hinge and the alignment part, preferably, the alignment part includes a stop bar shaft arranged below the bottom surface of the loading platform, a paper stop arm arranged on the side of the stop bar shaft body, and a stop bar arm fixedly connected to one end of the stop bar shaft facing the bracket, and the stop bar shaft and the stop arm can keep rotating below the bottom surface of the loading platform with the axis of the stop bar shaft as the center of curvature; one end of the stop bar arm away from the stop bar shaft is hinged to one end of the double-headed hinge, and the other end of the double-headed hinge is eccentrically hinged to the swing arm, and when the swing arm rotates, the stop bar arm and the stop bar shaft are driven to rotate synchronously through the double-headed hinge; the loading platform has a through slot running through the upper and lower surfaces, and the paper stop arm extends from the through slot when pivoting to the alignment position to press against the bottom front end of the paper.

[0014] As a construction method of a control unit, preferably, the control unit includes

[0015] The carriage is horizontally arranged in the printer;

[0016] The carriage is used to accommodate the ink cartridge assembly and can be driven to move back and forth on the carriage frame, and the carriage has a protrusion;

[0017] a locking arm pivotally connected to the bracket;

[0018] When the carriage moves to a preset area, the protrusion can gradually squeeze the locking arm to rotate it to a preset locking position to lock the swing arm.

[0019] In order to simply construct a locking method between the locking arm and the swing arm, so that the swing arm does not rotate, and then the barrier shaft and the paper stop arm do not rotate, to avoid the paper from penetrating too deeply due to the failure of the paper stop arm, preferably, the locking arm has a locking groove on the side facing the swing arm; the swing arm extends a part as a lock tongue, and an arc groove is provided on the bracket corresponding to the movement trajectory of the lock tongue, and the lock tongue is restricted to swinging in the arc groove; when the locking arm rotates to the locking position, it cooperates with the edge of the arc groove to limit the lock tongue in the locking groove, thereby locking the swing arm so that it does not rotate.

[0020] When the printer is working, the carriage moves out of the preset area and the locking arm is no longer squeezed. In order to enable the locking arm in this state to release the lock of the swing arm, preferably, there is a tension spring between the locking arm and the bracket, so that the locking arm always has a tendency to rotate outward from the locking position.

[0021] In order to cooperate with the protrusion so that the protrusion can gradually squeeze the locking arm, preferably, the locking arm has a flange at one end facing the protrusion, and the flange has an inclined surface facing the approaching direction of the carriage. When the carriage moves, the protrusion can contact the inclined surface and gradually squeeze to rotate the locking arm.

[0022] Compared with the prior art, the advantage of the present invention is that by setting a control part, it is possible to control the swing arm, the double-headed hinge and the alignment part to form a fixed connection state, and the problem of failure of the anti-over-depth structure caused by the user putting the paper with force can always be controlled to be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic structural diagram of an embodiment of the present utility model;

[0024] Figure 2 This is a structural diagram of the paper placement after removing the loading platform in the embodiment of the utility model;

[0025] Figure 3 This is a schematic diagram of the structure of the embodiment of the utility model after removing the loading platform and paper;

[0026] Figure 4 This is a schematic diagram of the partial structure of the control unit in an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the structure of the embodiment of the utility model after removing the loading platform, the carriage frame guard plate and the paper;

[0028] Figure 6 This is a side view of the embodiment of the utility model when the swing arm and the lock tongue are in the first swing position and locked by the locking arm;

[0029] Figure 7 This is a side view from another direction when the swing arm and the lock tongue are in the first swing position and locked by the locking arm according to the embodiment of the utility model;

[0030] Figure 8 This is a structural diagram of an embodiment of the utility model when the swing arm and the lock tongue are in the first swing position and locked by the locking arm;

[0031] Figure 9 This is a side view of the embodiment of the utility model when the swing arm and the lock tongue are in the second swing position and unlocked;

[0032] Figure 10 This is a side view from another direction when the swing arm and the lock tongue are in the second swing position and unlocked according to the embodiment of the utility model;

[0033] Figure 11 This is a structural diagram of an embodiment of the utility model when the swing arm and the lock tongue are in the second swing position and unlocked;

[0034] Figure 12 This is a structural diagram of the loading platform in an embodiment of the present utility model;

[0035] Figure 13This is a schematic diagram of the structure of the locking arm and the carriage in the embodiment of the present utility model;

[0036] Figure 14 This is a structural diagram of another angle of the embodiment of the utility model;

[0037] Figure 15 This is a structural diagram of the prior art solution from one angle;

[0038] Figure 16 This is a structural diagram from another angle when the existing technical solution removes components such as the loading platform;

[0039] Figure 17 This is a side view of the prior art solution without the loading platform and other components and in a dead point state;

[0040] Figure 18 This is a side view of the prior art solution without the loading platform and other components, and when it is at a dead point and destroyed;

[0041] Figure 19 This is a schematic diagram of the structure decomposition of the existing technical solution when the loading platform is removed;

[0042] Figure 20 It is a simplified schematic diagram of the dead point state of the prior art solution;

[0043] Figure 21 This is a simplified schematic diagram of the prior art solution when the dead point state is destroyed. DETAILED DESCRIPTION

[0044] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0045] like Figures 1 to 3 The structure of the inkjet printer to prevent the paper from being placed too deep includes: a loading platform 1 arranged in the printer, specifically Figure 12 As shown, a paper placement space 2 for accommodating paper 9 is provided on the loading platform 1. Figure 2 As shown, a support seat 11 is provided above the bottom surface of the loading platform 1 to support the lower end of the paper 9. Please refer to Figure 20 A rod-shaped barrier shaft 3 is provided below the bottom surface of the loading platform 1, and a plurality of paper blocking arms 31 are provided on the side of the barrier shaft 3, which can be pivoted to Figure 3 and Figure 5 1 and aligns the front end of the paper 9 on the loading platform 1 and can be pivoted to the alignment position shown in FIG. Figure 8, which allows paper 9 to be conveyed. A bracket 12 is provided outside the paper placement space 2, and a main gear 13 is pivotally connected to the bracket 12. A gear transmission structure meshes with the main gear 13, transmitting power from a drive source 8 located on the other side of the paper feed space 2 to the main gear 13. In this embodiment, the drive source 8 is preferably a paper feed motor.

[0046] A swing arm 131 is fixedly connected to the main gear 13 and can be synchronously pivoted around the same axis as the rotation axis of the main gear 13. Figure 4 The end of the barrier shaft 3 facing the bracket 12 is fixedly connected to a barrier arm 32, and the barrier shaft 3 and the barrier arm 32 can keep rotating under the bottom surface of the loading platform 1 with the axis 1A of the barrier shaft 3 as the center of curvature; the end of the barrier arm 32 away from the barrier shaft 3 is hinged to one end of a double-headed hinge 4, and the other end of the double-headed hinge 4 is hinged to the swing arm 131 away from the axis. When the swing arm 131 rotates, the barrier arm 32 and the barrier shaft 3 are driven to rotate synchronously through the double-headed hinge 4; the loading platform 1 has a through slot 14 running through the upper and lower surfaces, and the paper stop arm 31 extends from the through slot 14 when it pivots to the alignment position, thereby pressing against the bottom front end of the paper 9 to play a blocking role.

[0047] In addition, focus on reference Figure 10 and Figure 12 The structure for preventing the paper from being placed too deep in the inkjet printer also includes a carriage frame 51 horizontally arranged in the printer; a carriage 5 for accommodating the ink cartridge assembly is driven by a carriage motor 53 to move back and forth on the carriage frame 51, and the carriage 5 has a protrusion 52; a locking arm 6 is pivotally connected to the bracket 12, and the locking arm 6 has a flange 61 on one end facing the protrusion 52, and the flange 61 has an inclined surface 611 facing the approaching direction of the carriage 5. When the carriage 5 moves, the protrusion 52 can contact the inclined surface 611 and gradually squeeze it, thereby causing the locking arm 6 to rotate.

[0048] The locking arm 6 has a locking groove 62 on the side facing the swing arm 131; a portion of the swing arm 131 extends as a locking tongue 1311, and an arcuate groove 121 is provided on the bracket 12 corresponding to the movement trajectory of the locking tongue 1311, and the locking tongue 1311 is restricted from swinging in the arcuate groove 121. Figures 6 to 8 When the carriage 5 moves to the preset area, the protrusion 52 gradually squeezes the locking arm 6 to rotate it to the preset locking position. At this time, the lock tongue 1311 is in the first swing position in the arc groove 121, and the locking arm 6 cooperates with the edge of the arc groove 121 to limit the lock tongue 1311 in the locking groove 62, thereby locking the swing arm 131 so that it does not rotate; a fixed connection state is formed between the swing arm 131, the double-headed hinge 4 and the stop bar shaft 3, and the stop bar shaft 3 and the paper stop arm 31 cannot rotate either, so it can always prevent the paper 9 from entering the paper placement space beyond a preset extent.

[0049] Focus on reference Figures 9 to 11 When the printer is working, the carriage 5 moves out of the preset area and the locking arm 6 is no longer squeezed. In order to enable the locking arm 6 in this state to release the lock on the swing arm 131, a tension spring 63 is set between the locking arm 6 and the bracket 12, so that the locking arm 6 always has a tendency to rotate away from the locking position. When the carriage 5 releases the contact with the locking arm 6, the locking arm 6 is pulled by the tension spring 63 and deflected away from the locking position.

[0050] Because the swing arm 131 is powered by the paper feed motor 8, and the paper feed roller 71 has a grating disk and a photoelectric sensor to provide a step counting function, the number of rotation steps of the paper feed roller 71 corresponding to the angle of the swing arm 131's rotation is fixed. The printer control logic can be configured to cause the paper feed motor to drive the paper feed roller 71 to rotate before the carriage 5 returns to the preset area, allowing the swing arm 131 to rotate back to the first swing position in the arc groove.

[0051] Furthermore, a swing gear 1312 is provided on the free end of the swing arm 131, which is engaged with the main gear 13. When the paper feed motor drives the swing arm 131 to rotate away from the first swing position, the swing gear 1312 can engage with the paper pickup gear 7 of the printer, thereby driving the paper pickup arm 72 to transport the paper 9. At this time, the lock tongue 1311 is in the second swing position in the arc groove 121.

Claims

1. A structure for preventing an inkjet printer from placing paper too deep, comprising: A loading platform (1) is provided in the printer and has a paper placement space (2) for accommodating paper (9); an aligning portion capable of pivoting to an aligning position for blocking and aligning a front end of a paper (9) located on the loading platform (1), and capable of pivoting to a conveyance allowing position for allowing the paper (9) to be conveyed; A bracket (12) is arranged outside the paper placement space (2); a main gear (13) pivotally connected to the bracket (12); a driving source (8) for transmitting power to the main gear (13) via a gear transmission structure meshing with the main gear (13); A swing arm (131) is fixedly connected to the main gear (13) and is capable of rotating around the same axis as the rotation axis of the main gear (13); a double-ended hinge (4) connecting the swing arm (131) and the alignment portion; The invention is characterized in that it also has a control unit capable of controlling the formation / release of a fixed connection state between the swing arm (131), the double-headed hinge (4) and the alignment unit, wherein the connection state always enables the alignment unit to block the paper (9) from entering the paper placement space (2) beyond a preset extent.

2. The structure for preventing paper from being placed too deep in an inkjet printer according to claim 1, characterized in that: The alignment portion comprises a blocking bar shaft (3) arranged below the bottom surface of the loading platform (1), a paper blocking arm (31) arranged on the side of the blocking bar shaft (3) and a blocking bar arm (32) fixedly connected to one end of the blocking bar shaft (3) facing the bracket (12); the blocking bar shaft (3) and the blocking bar arm (32) can rotate below the bottom surface of the loading platform (1) with the axis of the blocking bar shaft (3) as the center of curvature; the blocking bar arm (32) is away from the blocking bar shaft (3) One end is hinged to one end of the double-headed hinge (4), and the other end of the double-headed hinge (4) is eccentrically hinged to the swing arm (131). When the swing arm (131) rotates, the stop arm (32) and the stop shaft (3) are driven to rotate synchronously through the double-headed hinge (4); the loading platform (1) has a through slot (14) running through the upper and lower surfaces, and the paper stop arm (31) extends from the through slot (14) when pivoting to the alignment position, thereby abutting against the bottom front end of the paper (9).

3. The structure for preventing the inkjet printer from placing paper too deep according to claim 1 or 2, characterized in that: The control unit includes: A carriage (51) is horizontally arranged in the printer; A carriage (5) is used to accommodate the ink cartridge assembly and can be driven to move back and forth on the carriage frame (5), and a protrusion (52) is provided on the carriage (5); a locking arm (6) pivotally connected to the bracket (12); When the carriage (5) moves to a preset area, the protrusion (52) can gradually press the locking arm (6) to rotate it to a preset locking position to lock the swing arm (131).

4. The structure for preventing paper from being placed too deep in an inkjet printer according to claim 3, characterized in that: The locking arm (6) has a locking groove (62) on a side facing the swing arm (131); a portion of the swing arm (131) extends out as a locking tongue (1311); an arcuate groove (121) is provided on the bracket (12) corresponding to the movement trajectory of the locking tongue (1311); the locking tongue (1311) is restricted from swinging in the arcuate groove (121); when the locking arm (6) rotates to a locking position, it cooperates with the edge of the arcuate groove (121) to restrict the locking tongue (1311) in the locking groove (62), thereby locking the swing arm (131) so that it does not rotate.

5. The structure for preventing the inkjet printer from placing paper too deep according to claim 4, characterized in that: A tension spring (63) is provided between the locking arm (6) and the bracket (12), so that the locking arm (6) always has a tendency to rotate outward from the locking position.

6. The structure for preventing paper from being placed too deep in an inkjet printer according to claim 3, characterized in that: The locking arm (6) has a flange (61) at one end facing the protrusion (52), and the flange (61) has an inclined surface (611) facing the approaching direction of the carriage (5). When the carriage (5) moves, the protrusion (52) can contact the inclined surface (611) and gradually squeeze it, thereby causing the locking arm (6) to rotate.

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