Paper limiting device of printer

Abstract

The utility model discloses a printer paper limiting device which comprises a shell, a paper bin for containing printing paper is arranged in the shell in a concave mode, paper limiting plates distributed left and right are arranged in the paper bin, sliding grooves are formed in the inner walls of the two sides of the paper bin, and sliding blocks connected with the sliding grooves in a sliding mode are arranged on the two sides of each paper limiting plate. A rotating plate is installed on the outer side faces of the two paper limiting plates or the outer side face of one of the two paper limiting plates, and the sliding blocks are driven to ascend and descend to abut against the top faces of the sliding grooves along with rotation of the rotating plate. The paper limiting device has the advantages that the bottom of the rotating plate is in contact with the inner bottom face of the paper bin through rotation of the rotating plate, so that the paper limiting plate rotationally connected with the rotating plate and the sliding block move upwards, the sliding block and the top face of the sliding groove are released, friction force is generated, and the paper limiting plate is prevented from moving; if the force for forcibly stirring or moving the paper limiting plate is larger than the friction force formed between the sliding block and the sliding groove, the paper limiting plate can also move in the locking state.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a paper limiting device for a printer. Background Art

[0002] Paper limiter is commonly used in printing equipment, and its function is to limit the paper position and prevent the paper from deviating to the left or right during printing. When the paper limiter is locked, if the operator makes a mistake and forcibly moves the paper limiter, the paper limiter is easily deformed and broken, causing the paper limiter to fail. Therefore, we provide a printer paper limiter to solve the above problem. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a paper limiting device for a printer.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A printer paper limiting device comprises a shell, wherein a paper bin for accommodating printing paper is concavely arranged in the shell, and limiting paper boards distributed on the left and right are arranged inside the paper bin, and slide grooves are opened on the inner walls on both sides of the paper bin, and sliders slidably connected to the slide grooves are arranged on both sides of each of the limiting paper boards, and a rotating plate is installed on the outer side surfaces of the two limiting paper boards or the outer side surface of one of the two limiting paper boards, and as the rotating plate rotates, the slider is driven to rise and fall and contact the top surface of the slide groove.

[0006] Preferably, a rack is fixedly provided on the bottom surface of each limiting paperboard, and a gear is meshed and connected between two racks.

[0007] Preferably, a guide structure for rotational guidance is provided between the rotating plate and the side surface of the limiting paperboard, and the guide structure includes a guide strip fixedly mounted on the outer surface of the limiting paperboard and adapted to the rotation trajectory of the rotating plate, and also includes a guide groove provided on the side surface of the rotating plate close to the limiting paperboard and adapted to the guide strip, and a fixing plate is provided on the top edge of the guide groove.

[0008] Preferably, a positioning structure for rotationally positioning the rotating plate is provided between the rotating plate and the guide bar, and the positioning structure includes an unlocking positioning groove and a locking positioning groove opened on the arc surface of the guide bar, and a positioning protrusion adapted to the unlocking positioning groove and the locking positioning groove is provided on the top surface of the guide groove.

[0009] Preferably, the outer side surface of the limiting paperboard is provided with a blocking structure for limiting the rotation of the rotating plate, and the blocking structure includes a mounting rib fixedly mounted on the outer side surface of the limiting paperboard and adapted to the shape of the guide groove, and a baffle is fixedly mounted on the mounting rib.

[0010] Preferably, a locking mark and an unlocking mark are provided on the inner side of the limiting paperboard.

[0011] Preferably, a distance scale is provided on an upper surface of one side of the paper bin.

[0012] Preferably, the cross section of the guide strip is in an "L" shape.

[0013] The utility model has the following advantages:

[0014] 1. The utility model rotates the rotating plate to make its bottom contact with the bottom surface of the paper bin, so that the limiting paperboard and the slider connected to the rotating plate move upward, and then the slider and the top surface of the slide groove are released to generate friction, thereby preventing the limiting paperboard from moving. If the force of forcibly moving or moving the limiting paperboard is greater than the friction formed between the slider and the slide groove, the limiting paperboard can be moved in the locked state without causing the limiting paperboard to deform and break, thereby protecting the limiting paperboard.

[0015] 2. The utility model sets a gear between the racks on the bottom surfaces of the two limiting paperboards, so that when one limiting paperboard is moved, the other limiting paperboard will also move towards or away from each other, thereby being able to center the printing paper roll in the paper bin.

[0016] 3. The utility model makes the rotating plate more stable during the rotation process through the sliding guiding action of the guide bar and the guide groove, and the fixed plate located at the top edge of the guide groove can restrict the guide bar in the guide groove to prevent the guide bar from separating from the guide groove and failing to play a guiding role.

[0017] 4. The utility model changes the distance between the two limiting paper boards by moving the two limiting paper boards closer to or away from each other, thereby being able to accommodate printing papers of various widths and improving the practicability of the paper limiting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall top view structure of the utility model.

[0019] Figure 2 It is a schematic diagram of the limiting paperboard, rack and gear structure of the utility model.

[0020] Figure 3 The figure is a schematic diagram of the position relationship among the limiting paperboard, the guide strip, the positioning structure and the blocking structure of the utility model.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the rotating plate of the utility model.

[0022] Figure 5 It is a front view schematic diagram of the rotating plate of the utility model.

[0023] Figure 6 It is a schematic diagram of the position relationship between the rotating plate and the limiting paperboard in the locked state of the utility model.

[0024] Figure 7 It is a schematic diagram of the position relationship of the rotating plate in the unlocked state of the utility model.

[0025] Figure 8 It is an overall three-dimensional schematic diagram of the utility model in the unlocked state.

[0026] Fig. 9 It is a schematic diagram of the position relationship structure of the rotating plate in the locked state of the utility model.

[0027] Fig.10 It is a schematic diagram of the overall three-dimensional structure of the utility model in a locked state.

[0028] In the figure, 1. shell; 2. paper bin; 3. paper limiter; 4. slide groove; 5. slider; 6. rotating plate; 7. rack; 8. gear; 9. guide structure; 91. guide bar; 92. guide groove; 93. fixed plate; 10. positioning structure; 101. unlocking positioning groove; 102. locking positioning groove; 103. positioning protrusion; 11. blocking structure; 111. mounting rib; 112. baffle; 121. locking mark; 122. unlocking mark; 13. distance scale. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] like Figure 1 — Fig.10 The embodiment shown.

[0032] A printer paper limiting device comprises a shell 1, wherein the shell 1 is concavely provided with a paper bin 2 for accommodating printing paper, the paper bin 2 is provided with left and right distributed limiting paper boards 3, the inner walls on both sides of the paper bin 2 are provided with slide grooves 4, and each of the limiting paper boards 3 is provided with sliders 5 slidably connected to the slide grooves 4 on both sides, and a rotating plate 6 is installed on the outer side surfaces of the two limiting paper boards 3 or the outer side surface of one of the two limiting paper boards 3, and as the rotating plate 6 rotates, the slider 5 is driven to rise and fall and contact the top surface of the slide groove 4.

[0033] See also Figures 1 to 10 As shown, Figure 1 and Fig.10 From the perspective of, in this embodiment, the distance from the rotating axis of the rotating plate 6 to its bottom end is a, and the distance from the rotating axis of the rotating plate 6 to the inner bottom surface of the paper bin 2 is b, then a is greater than b, so that the bottom end of the rotating plate 6 can conflict with the inner bottom surface of the paper bin 2 during the rotation of the rotating plate 6. Since a is greater than b, under the action of the action force and the reaction force, the inner bottom surface of the paper bin 2 will give an upward force to the rotating plate 6 and the limiting paperboard 3 rotatably connected to the rotating plate 6, and then the rotating plate 6 will drive the limiting paperboard 3 and the sliders 5 located at both ends of the limiting paperboard 3 to move upward, so that the slider 5 conflicts with the top surface of the slide groove 4, so that friction is generated between the slider 5 and the top surface of the slide groove 4 to prevent the limiting paperboard 3 from moving. At this time, it is in a locked state. When releasing the locked state, you only need to rotate the rotating plate 6 in the opposite direction, that is, the slider 5 and the slide groove 4 do not contact and do not generate friction, which is the unlocked state.

[0034] In the locked state, if a moving force is applied to the limiting paperboard 3 from the outside, and if the force is greater than the friction force generated between the slider 5 and the top surface of the slide groove 4, the limiting paperboard 3 can be forcibly moved, and the limiting paperboard 3 will not be deformed or broken due to excessive force, thereby protecting the limiting paperboard 3.

[0035] In this embodiment, only one side of the limiting paperboard 3 is rotatably mounted with the rotating plate 6. In other embodiments, the rotating plates 6 can also be rotatably mounted on both sides of the limiting paperboard 3. The design can be selected according to needs and is not specifically limited here.

[0036] A rack 7 is fixedly disposed on the bottom surface of each limiting paperboard 3 , and a gear 8 is meshedly connected between two racks 7 .

[0037] See also Figures 1 to 3 As shown, by setting a gear 8 between the racks 7 on the bottom surfaces of the two limiting paperboards 3, when one of the limiting paperboards 3 is moved, the other limiting paperboard 3 will also move towards or away from each other, thereby being able to center the printing paper roll in the paper bin 2. In this embodiment, the gear 8 is a damping gear.

[0038] A guide structure 9 for rotational guidance is provided between the rotating plate 6 and the side surface of the limiting paperboard 3, and the guide structure 9 includes a guide bar 91 fixedly mounted on the outer surface of the limiting paperboard 3 and adapted to the rotation trajectory of the rotating plate 6, and also includes a guide groove 92 provided on the side surface of the rotating plate 6 close to the limiting paperboard 3 and adapted to the guide bar 91, and a fixing plate 93 is provided on the top edge of the guide groove 92; the cross-section of the guide bar 91 is in an "L" shape.

[0039] See also Figures 2 to 6 As shown, the sliding guiding action of the guide bar 91 and the guide groove 92 makes the rotating plate 6 more stable during the rotation process, and the fixed plate 93 located at the top edge of the guide groove 92 can limit the guide bar 91 in the guide groove 92 to prevent the guide bar 91 from being separated from the guide groove 92 and failing to play a guiding role. An arc groove is formed between the "L"-shaped guide bar 91 and the limiting paperboard 3. During the rotation of the rotating plate 6, the fixed plate 93 is located in the arc, thereby preventing the guide groove 92 from being separated from the guide bar 91.

[0040] A positioning structure 10 for rotationally positioning the rotating plate 6 is arranged between the rotating plate 6 and the guide bar 91, and the positioning structure 10 includes an unlocking positioning groove 101 and a locking positioning groove 102 opened on the arc surface of the guide bar 91, and the top surface of the guide groove 92 is provided with a positioning protrusion 103 adapted to the unlocking positioning groove 101 and the locking positioning groove 102.

[0041] See also Figures 2 to 6 As shown, when the rotating plate 6 is rotating, for example, when the rotating plate 6 is rotated to the position of the unlocking positioning groove 101, the positioning protrusion 103 follows the rotating plate 6 to rotate to the position of the unlocking positioning groove 101, and the positioning protrusion 103 is snapped into the unlocking positioning groove 101 to achieve unlocking positioning; when the positioning protrusion 103 follows the rotating plate 6 to rotate to the position of the locking positioning groove 102, the positioning protrusion 103 is snapped into the locking positioning groove 102 to achieve locking positioning. At this time, due to the combined positioning of the positioning protrusion 103 and the locking positioning groove 102, the rotating plate 6 can be prevented from rotating at will under the guidance of the guide bar 91.

[0042] In this embodiment, in order to make the positioning protrusion 103 easier to combine with or separate from the unlocking positioning groove 101 and the locking positioning groove 102, the unlocking positioning groove 101, the locking positioning groove 102 and the positioning protrusion 103 are all arc-shaped in shape. The specific arc size can be designed according to needs and is not specifically limited here.

[0043] In this embodiment, see Fig. 9 and Fig.10As shown, in the locked state, the rotating plate 6 is in a vertical state, at this time, the positioning protrusion 103 is combined with the locking positioning groove 102 for positioning, the bottom of the rotating plate 6 is in contact with the bottom surface of the paper bin 2, and the slider 5 is in contact with the top surface of the slide groove 4 to generate friction;

[0044] See also Figure 7 and Figure 8 As shown, when in the unlocked state, the rotating plate 6 is in an inclined state, at which time the bottom of the rotating plate 6 does not conflict with the inner bottom surface of the paper bin 2, and accordingly, the slider 5 does not contact the slide groove 4, thereby also generating friction.

[0045] The outer side of the limiting paperboard 3 is provided with a blocking structure 11 for limiting the rotation of the rotating plate 6. The blocking structure 11 includes a mounting rib 111 fixedly mounted on the outer side of the limiting paperboard 3 and adapted in shape to the guide groove 92. A baffle 112 is fixedly mounted on the mounting rib 111.

[0046] See also Figures 1 to 10 As shown, when locked, in order to prevent the rotating plate 6 from failing to reach a specific position when rotating, the rotating plate 6 is blocked by installing a baffle 112 on the rib 111, so that the rotating plate 6 contacts the baffle 112 and is blocked by the baffle 112 when in the locked state, and the installing rib 111 is located in the guide groove 92 when the rotating plate 6 rotates, and the installing rib 111 guides the bottom surface of the guide groove 92 when the rotating plate 6 rotates, and under the dual guidance of the guide bar 91 and the installing rib 111, the stability of the rotating plate 6 during rotation is further improved.

[0047] The inner side surface of the limiting paperboard 3 is provided with a locking mark 121 and an unlocking mark 122 .

[0048] See also Figures 1 to 10 As shown, the locking mark 121 is located at the middle top position of the inner side of the limiting paperboard 3, and the unlocking mark 122 is located on one side of the surface of the limiting paperboard 3. The locking mark 121 is at the position of the locking positioning groove 102, and the unlocking mark 122 is at the position of the unlocking positioning groove 101. When the rotating plate 6 rotates to the position of the locking mark 121, it is in the locked state, and when the rotating plate 6 rotates to the position of the unlocking mark 122, it is in the unlocked state. The locking mark 121 and the unlocking mark 122 can be used to intuitively determine whether the limiting paperboard 3 is in the locked or unlocked state.

[0049] A distance scale 13 is provided on an upper surface of one side of the paper bin 2 .

[0050] See also Figure 1 As shown, the positions of the two limiting paperboards 3 can be directly observed and determined through the distance scale 13 .

[0051] The working process of the utility model is as follows: in the initial state, the rotating plate 6 rotates to the position of the unlocking mark 122, at which time the limiting paperboard 3 is in the unlocking state, that is, the slider 5 does not contact the top surface of the slide groove 4. When the printing paper roll is fixed, the limiting paperboard 3 is first moved to the predetermined position, and then the rotating plate 6 is rotated to the position of the locking mark 121. During the rotation process, the bottom of the rotating plate 6 conflicts with the inner bottom wall of the paper bin 2. As the rotation continues until the rotating plate 6 rotates to the vertical state, that is, the position of the locking mark 121, the rotating plate 6, the limiting paperboard 3 and the slider 5 move upward as a whole under the action of the conflict between the rotating plate 6 and the inner bottom surface of the paper bin 2, so that the slider 5 conflicts with the top surface of the slide groove 4. The friction between the slider 5 and the top surface of the slide groove 4 generates friction to prevent the limiting paperboard 3 from moving, thereby achieving the limitation of the printing paper roll.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A paper limiting device for a printer, characterized in that: The invention comprises a shell (1), wherein a paper bin (2) for accommodating printing paper is concavely arranged inside the shell (1), and limiting paper boards (3) are arranged inside the paper bin (2) and are distributed on the left and right. Slide grooves (4) are provided on the inner walls on both sides of the paper bin (2), and sliders (5) slidably connected to the slide grooves (4) are arranged on both sides of each limiting paper board (3). A rotating plate (6) is installed on the outer side surfaces of two limiting paper boards (3) or on the outer side surface of one of the two limiting paper boards (3), and as the rotating plate (6) rotates, the sliders (5) are driven to rise and fall and contact with the top surfaces of the slide grooves (4).

2. A printer paper limiting device according to claim 1, characterized in that: A rack (7) is fixedly arranged on the bottom surface of each limiting paperboard (3), and a gear (8) is meshedly connected between two of the racks (7).

3. A printer paper limiting device according to claim 1, characterized in that: A guide structure (9) for rotational guidance is provided between the rotating plate (6) and the side surface of the limiting paperboard (3), the guide structure (9) comprising a guide bar (91) fixedly mounted on the outer side surface of the limiting paperboard (3) and adapted to the rotation trajectory of the rotating plate (6), and also comprising a guide groove (92) provided on the side surface of the rotating plate (6) close to the limiting paperboard (3) and adapted to the guide bar (91), and a fixing plate (93) is provided at the top edge of the guide groove (92).

4. A printer paper limiting device according to claim 3, characterized in that: A positioning structure (10) for rotationally positioning the rotating plate (6) is provided between the rotating plate (6) and the guide strip (91), the positioning structure (10) comprising an unlocking positioning groove (101) and a locking positioning groove (102) provided on the arc surface of the guide strip (91), and a positioning protrusion (103) adapted to the unlocking positioning groove (101) and the locking positioning groove (102) is provided on the top surface of the guide groove (92).

5. A printer paper limiting device according to claim 3, characterized in that: The outer side surface of the limiting paperboard (3) is provided with a blocking structure (11) for limiting the rotation of the rotating plate (6); the blocking structure (11) comprises a mounting rib (111) fixedly mounted on the outer side surface of the limiting paperboard (3) and matching the shape of the guide groove (92); a baffle (112) is fixedly mounted on the mounting rib (111).

6. A printer paper limiting device according to claim 1, characterized in that: The inner side surface of the limiting paperboard (3) is provided with a locking mark (121) and an unlocking mark (122).

7. A printer paper limiting device according to claim 1, characterized in that: A distance scale (13) is provided on an upper surface of one side of the paper bin (2).

8. A printer paper limiting device according to claim 3, characterized in that: The guide strip (91) has an L-shaped cross section.

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