Automatic clamping paper box of laser printer

Abstract

The utility model relates to the technical field of laser printers, in particular to an automatic clamping paper box of a laser printer, which comprises a paper box body and a paper placing groove arranged at the top of the paper box body, and further comprises a calibration clamping part arranged in the paper placing groove, the calibration clamping part is used for clamping a pile of paper in the width direction of the paper and calibrating and aligning the boundary of the pile of paper, the at least two guide grooves are oppositely formed in the paper placing groove, and positioning blocks are arranged in the guide grooves in a sliding mode and used for positioning and adjusting the minimum clamping width of the calibration clamping part. The two opposite positioning blocks are driven by the driving part to move close to or away from each other, a paper clamping and fixing area can be positioned in advance according to the size of paper, the minimum clamping width of the calibration clamping part is adjusted and limited, the elastic clamping force borne by the paper is prevented from being obviously changed, and the paper clamping accuracy is improved. And the supply smoothness of the paper during printing is influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to laser printer technical field especially relates to a laser printer's automatic clamping paper box. BACKGROUND

[0002] The automatic clamping paper box is a more important component on the laser printer, which is used for containing blank paper and can supply the paper to the laser printer during printing. The automatic clamping paper box is internally provided with a transverse elastic clamping mechanism for clamping and fixing the paper.

[0003] Since the elastic clamping mechanism in the paper box has different clamping forces on the paper when clamping different sizes of paper, it is easy to make the middle of the paper bulge when the number of paper is small, resulting in the problem of paper crease or paper jam when feeding the paper. SUMMARY

[0004] Therefore, the utility model discloses a laser printer's automatic clamping paper box to solve the problem that the elastic clamping mechanism makes the middle of the paper bulge when the number of paper is small, resulting in the problem of paper crease or paper jam when feeding the paper.

[0005] In order to achieve the above purpose, the utility model provides a laser printer's automatic clamping paper box, which comprises a paper box body and a paper feeding groove arranged on the top of the paper box body, and further comprises:

[0006] A calibration clamping part arranged in the paper feeding groove is used for clamping a stack of paper along the width direction of the paper and calibrating the boundary of the stack of paper.

[0007] At least two guide grooves are arranged in the paper feeding groove, and a positioning block is slidably arranged in the guide groove, which is used for positioning and adjusting the minimum clamping width of the calibration clamping part.

[0008] A driving part is used for driving the two positioning blocks to move close to or away from each other.

[0009] Preferably, the driving part comprises:

[0010] A bidirectional screw rod is rotatably inserted into the two guide grooves, and the two positioning blocks are threadedly sleeved on the two ends of the bidirectional screw rod.

[0011] A guide block is fixedly arranged on the paper box body.

[0012] A horizontal rack is slidably sleeved on the guide block.

[0013] A transmission gear is fixedly arranged on one end of the bidirectional screw rod, and the tooth surface of the transmission gear is engaged with the tooth surface of the horizontal rack.

[0014] A telescopic cylinder is fixedly mounted on the cardboard box body, and the telescopic cylinder is used to drive the horizontal rack to move back and forth in a linear motion.

[0015] Preferably, the calibration clamping part includes:

[0016] A guide rod is laterally fixed and inserted into the two opposite guide grooves.

[0017] The sliders are relatively slidably fitted onto both ends of the guide rod.

[0018] A spring is provided between the end face of the guide rod and the slider.

[0019] A clamping plate is fixedly disposed on the top of the slider, and a lower protrusion is fixedly disposed on the bottom of the clamping plate. The lower protrusion is slidably sleeved with a limiting groove disposed in the paper feeding slot.

[0020] A stop arm is provided on the clamping plate.

[0021] Preferably, the cross-sectional shape of the stop arm is L-shaped, and the distance between the opposite surfaces of the two stop arms is greater than the distance between the opposite surfaces of the two clamping plates.

[0022] Preferably, the bidirectional lead screw and the guide rod are located side by side inside the guide groove, and the thread directions at both ends of the bidirectional lead screw are opposite.

[0023] Preferably, the calibration clamp further includes:

[0024] A toothed rack is fixedly mounted on the lower protrusion.

[0025] Rotate the central gear located at the bottom of the cardboard box body.

[0026] Preferably, the intermediate gear is located between the two pairs of racks, and the tooth surface of the intermediate gear meshes with the tooth surfaces of the two pairs of racks respectively.

[0027] Preferably, the automatic clamping paper tray of the laser printer further includes a sliding groove located at the bottom of the paper feeding slot, and a limiting plate is slidably sleeved inside the sliding groove.

[0028] The beneficial effects of this utility model are:

[0029] The utility model discloses a drive part drives two positioning blocks to move close to or away from each other, can according to paper size in advance position paper clamping fixed area, and the minimum clamping width of calibration clamping part is adjusted and is limited, avoid the obvious change of the elasticity clamping degree of paper, and influence paper supply smoothness when printing, and through the width of paper placement area is adjusted in advance by positioning block, when a bunch of paper width direction has some misalignment, can be pressed and aligned under the action of the elastic clamping force of calibration clamping part, need not manual calibration alignment for many times, improve paper placement efficiency and neatness. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following further detailed description of the utility model is combined with specific examples.

[0031] Figure 1 For the three-dimensional schematic diagram of the utility model Figure 1 ;

[0032] Figure 2 For the three-dimensional schematic diagram of the utility model Figure 2 ;

[0033] Figure 3 For the three-dimensional schematic diagram of the utility model Figure 3 ;

[0034] Figure 4 For the three-dimensional schematic diagram of the utility model Figure 4 ;

[0035] Figure 5 For the three-dimensional schematic diagram of the utility model Figure 5 .

[0036] Marked as in the figure:

[0037] 1, paper box body;2, guide groove;3, positioning block;4, drive part;41, bidirectional screw;42, guide block;43, horizontal rack;44, transmission tooth;45, telescopic cylinder;5, calibration clamping part;51, limit groove;52, clamping plate;53, guide rod;54, sliding block;55, spring;56, gear rack;57, transfer gear;58, blocking arm;6, sliding slot;7, limit supporting plate;8, paper placing groove. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical scheme and advantage of the utility model more clearly, the following further detailed description of the utility model is combined with specific examples.

[0039] It should be noted that, unless otherwise defined, technical or scientific terms used in the present application should be understood as having the common meaning in the field of the present application to which they belong. The terms "first", "second" and similar terms used in the present application do not indicate any order, number or importance, but are only used to distinguish different components. The terms "include" or "contain" and similar terms mean that the elements or objects before the term cover the elements or objects listed after the term and their equivalents, without excluding other elements or objects. The terms "connect" or "connected" and similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships, which may change accordingly when the absolute position of the described object changes.

[0040] As shown in Figures 1 to 3 An automatic clamping paper box of a laser printer comprises a paper box body 1 and a paper discharge slot 8 arranged on the top of the paper box body 1, and further comprises:

[0041] A calibration clamping part 5 arranged in the paper discharge slot 8, which is used to clamp a stack of paper along the width direction of the paper and calibrate the boundary of the stack of paper.

[0042] At least two guide slots 2 are arranged in the paper discharge slot 8, and a positioning block 3 is slidably arranged in the guide slot 2, which is used to position and adjust the minimum clamping width of the calibration clamping part 5.

[0043] A driving part 4 for driving the two positioning blocks 3 to move closer to or away from each other.

[0044] As shown in Figures 2 to 4 The driving part 4 comprises:

[0045] A bidirectional screw rod 41 is rotatably inserted into the two guide slots 2, and the two positioning blocks 3 are threadedly sleeved on the two ends of the bidirectional screw rod 41, respectively.

[0046] A guide block 42 is fixedly arranged on the paper box body 1.

[0047] A horizontal rack 43 is slidably sleeved on the guide block 42.

[0048] A transmission tooth 44 is fixedly arranged on one end of the bidirectional screw rod 41, and the tooth surface of the transmission tooth 44 is engaged with the tooth surface of the horizontal rack 43.

[0049] A telescopic cylinder 45 is fixedly arranged on the paper box body 1, and is used to drive the horizontal rack 43 to move linearly back and forth.

[0050] Thus, by controlling the extension and retraction of the telescopic cylinder 45, and by power transmission through the horizontal rack 43 and the transmission teeth 44, the bidirectional screw rod 41 can be driven to rotate forward and backward, thereby synchronously driving the two positioning blocks 3 to move closer to or further away from each other, adjusting the distance between the two positioning blocks 3, and improving the efficiency of the adjustment operation.

[0051] As shown in Figure 2 , Figure 3 and Figure 5 , the calibration clamping part 5 comprises:

[0052] The guide rod 53 is transversely fixed and inserted into the two opposite guide grooves 2.

[0053] The slider 54 is slidably sleeved on both ends of the guide rod 53.

[0054] The spring 55 is arranged between the end face of the guide rod 53 and the slider 54.

[0055] The clamping plate 52 is fixedly arranged on the top of the slider 54, and the bottom of the clamping plate 52 is fixedly provided with a lower protrusion which is slidably sleeved with the limiting groove 51 arranged in the paper discharge groove 8.

[0056] The blocking arm 58 is arranged on the clamping plate 52.

[0057] The cross-sectional shape of the blocking arm 58 is L-shaped, and the distance between the opposite surfaces of the two blocking arms 58 is greater than the distance between the opposite surfaces of the two clamping plates 52.

[0058] In this way, before a stack of paper is placed, one of the clamping plates 52 is pushed away from the other clamping plate 52 until the distance between the two clamping plates 52 is greater than the width of the paper, so as to facilitate the placement of a stack of paper between the two clamping plates 52. During the pushing of the clamping plate 52, the clamping plate 52 compresses the spring 55 and accumulates elastic force. After the paper is placed, the hand pushing the clamping plate 52 is released, and the clamping plate 52 is reset under the elastic force of the spring 55 and approaches the other clamping plate 52. At the same time, the stack of paper is pushed against the other clamping plate 52 until the two clamping plates 52 are stationary, thereby completing the clamping of the paper. When the width of the paper does not match the distance between the two positioning blocks 3, the telescopic cylinder 45 is controlled to extend or retract, thereby driving the bidirectional screw 41 to rotate and moving the two positioning blocks 3 closer to or farther away from each other. At the same time, the blocking arm 58 moves automatically with the movement of the positioning block 3 under the elastic force of the spring 55 until the distance between the two clamping plates 52 matches the width of the paper to be clamped, thereby indirectly adjusting the distance between the two clamping plates 52 and improving the adjustment efficiency of the distance between the two clamping plates 52. Before clamping paper of different widths, the adjustment efficiency is improved under the premise of maintaining high adjustment accuracy. The two clamping plates 52 are left with a certain space between the two positioning blocks 3, so as to temporarily increase the distance between the two clamping plates 52 before placing the paper, thereby facilitating the placement of a stack of paper. After the paper is placed, the stack of paper is pushed to the center of the paper placing groove 8 by the elastic force accumulated by the spring 55, and the length boundary of the stack of paper is automatically aligned to improve the smoothness of the paper feeding during subsequent printing.

[0059] As shown in Figure 2 , the bidirectional screw 41 and the guide rod 53 are arranged side by side in the guide groove 2, and the threads on the two ends of the bidirectional screw 41 are opposite. In this way, the two positioning blocks 3 arranged on the two ends of the bidirectional screw 41 can be moved closer to or farther away from each other synchronously, thereby improving the efficiency of adjusting the distance between the two positioning blocks 3.

[0060] As shown in Figure 2 and Figure 5 , the calibration clamping part 5 further comprises:

[0061] The toothed bars 56 are fixed to the lower protrusions.

[0062] The transfer gear 57 is arranged at the bottom of the paper box body 1.

[0063] The transfer gear 57 is located between the two toothed bars 56, and the tooth surfaces of the transfer gear 57 are engaged with the tooth surfaces of the two toothed bars 56, respectively.

[0064] Thus, by pushing and pulling one clamping plate 52, the other clamping plate 52 can be pushed and pulled synchronously, and the two clamping plates 52 can move linearly towards or away from each other, so as to efficiently adjust the distance between the two clamping plates 52, so as to be able to place paper sheets of different widths.

[0065] As shown in Figure 1 and Figure 2 The automatic clamping paper box of the laser printer further comprises a sliding groove 6 arranged at the inner bottom of the paper placing groove 8, and a limiting supporting plate 7 is sleeved in the sliding groove 6. Thus, by pulling the limiting supporting plate 7 to slide different distances in the sliding groove 6, the total length of the paper placing groove 8 can be expanded, so as to be able to place paper sheets of different sizes, and the range of applicable paper sheet sizes is expanded.

[0066] Working principle: Before placing a stack of paper sheets, one clamping plate 52 is pushed away from the other clamping plate 52 until the distance between the two clamping plates 52 is greater than the width of the paper sheet, so as to place a stack of paper sheets between the two clamping plates 52. During the process of pushing the clamping plate 52, the clamping plate 52 will compress the spring 55 and accumulate elastic force. After the paper sheet is placed, the hand pushing the clamping plate 52 is released, and the clamping plate 52 can be reset and close to the other clamping plate 52 under the action of the elastic force of the spring 55. At the same time, the stack of paper sheets can be pushed to abut against the other clamping plate 52 until the two clamping plates 52 are stationary, and the operation of clamping the paper sheet is completed. When the width of the paper sheet does not match the distance between the two positioning blocks 3, the extension and retraction of the telescopic cylinder 45 can be controlled to drive the bidirectional screw rod 41 to rotate and drive the two positioning blocks 3 to move towards or away from each other. At the same time, the blocking arm 58 will automatically move with the movement of the positioning block 3 under the action of the elastic force of the spring 55 until the distance between the two clamping plates 52 matches the width of the paper sheet to be clamped, so as to indirectly adjust the distance between the two clamping plates 52 and improve the distance adjustment efficiency between the two clamping plates 52. Before clamping paper sheets of different widths, the adjustment efficiency is improved under the premise of maintaining high adjustment accuracy. The two clamping plates 52 can leave a certain space between the two positioning blocks 3, so as to temporarily increase the distance between the two clamping plates 52 before placing paper sheets, facilitate the placement of a stack of paper sheets, and automatically push the length boundary of a stack of paper sheets to be more orderly after the paper sheets are placed, improve the smoothness of paper feeding during subsequent printing, and improve the placement efficiency and automatic centering and calibration efficiency of paper sheets of different widths.

[0067] Those skilled in the art will understand that the above discussion of any of the embodiments is merely exemplary in nature and is not intended to imply that the scope of the present application, including the claims, is limited to these examples; the above embodiments or technical features among different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for the sake of brevity.

[0068] The present application is intended to cover all such alternatives, modifications, and variations as fall within the broad scope of the appended claims. Accordingly, any and all such alternatives, modifications and variations are intended to be encompassed by the appended claims.

Claims

1. An automatic clamping paper tray for a laser printer, comprising a paper tray body (1) and a paper feeding slot (8) disposed on the top of the paper tray body (1), characterized in that, The automatic paper clamping tray of the laser printer also includes: The calibration clamping part (5) is provided in the paper feeding slot (8). The calibration clamping part (5) is used to clamp a stack of papers along the paper width direction and calibrate and align the boundary of the stack of papers. At least two guide grooves (2) are provided in the paper feeding slot (8), and a positioning block (3) is slidably provided in the guide groove (2). The positioning block (3) is used to position and adjust the minimum clamping width of the calibration clamping part (5). A drive unit (4) for driving the two positioning blocks (3) to move closer or further apart from each other.

2. The automatic paper clamping tray for a laser printer according to claim 1, characterized in that, The drive unit (4) includes: The bidirectional lead screw (41) is rotated and inserted into the two relative guide grooves (2), and the two relative positioning blocks (3) are respectively threaded onto the two ends of the bidirectional lead screw (41); A guide block (42) is fixedly disposed on the cardboard box body (1); A transverse rack (43) is slidably sleeved on the guide block (42); A transmission tooth (44) is fixedly disposed at one end of the bidirectional lead screw (41), and the tooth surface of the transmission tooth (44) meshes with the tooth surface of the transverse rack (43); A telescopic cylinder (45) is fixedly mounted on the paper box body (1), and the telescopic cylinder (45) is used to drive the horizontal rack (43) to reciprocate linearly.

3. The automatic paper clamping tray for a laser printer according to claim 2, characterized in that, The calibration clamp (5) includes: A guide rod (53) is laterally fixed and inserted into the two opposite guide grooves (2); Slider (54) that are relatively slidably sleeved at both ends of the guide rod (53); A spring (55) is provided between the end face of the guide rod (53) and the slider (54); A clamping plate (52) is fixedly installed on the top of the slider (54). A lower protrusion is fixedly installed at the bottom of the clamping plate (52). The lower protrusion is slidably sleeved with a limiting groove (51) provided in the paper feeding groove (8). A stop arm (58) is provided on the clamping plate (52).

4. The automatic paper clamping tray for a laser printer according to claim 3, characterized in that, The cross-sectional shape of the stop arm (58) is L-shaped, and the distance between the opposite surfaces of the two stop arms (58) is greater than the distance between the opposite surfaces of the two clamping plates (52).

5. The automatic paper clamping tray for a laser printer according to claim 4, characterized in that, The bidirectional lead screw (41) and the guide rod (53) are located side by side inside the guide groove (2), and the thread directions at both ends of the bidirectional lead screw (41) are opposite.

6. The automatic paper clamping tray for a laser printer according to claim 5, characterized in that, The calibration clamp (5) also includes: A toothed rack (56) is fixedly mounted on the lower protrusion; Rotate the central gear (57) located at the bottom of the carton body (1).

7. The automatic paper clamping tray for a laser printer according to claim 6, characterized in that, The intermediate gear (57) is located between the two pairs of racks (56), and the tooth surface of the intermediate gear (57) meshes with the tooth surface of the two pairs of racks (56).

8. The automatic paper clamping tray for a laser printer according to claim 1, characterized in that, The automatic clamping paper tray of the laser printer also includes a sliding groove (6) located at the bottom of the paper tray (8), and a limiting plate (7) is slidably sleeved inside the sliding groove (6).

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