Printer internal paper limiting mechanism and printer

Abstract

The utility model provides a printer internal paper limiting mechanism and a printer, and belongs to the technical field of printers. The printer internal paper limiting mechanism comprises a shell, a paper bin is arranged in the shell, two sliding grooves are symmetrically formed in the circumferential side wall of the paper bin, and a first paper limiting block and a second paper limiting block are slidably installed in the two sliding grooves respectively; a gear is rotationally arranged on the circumferential outer wall of the paper bin and located between the two sliding grooves, racks are detachably installed on the first paper limiting block and the second paper limiting block correspondingly, and the gear is engaged with the two racks correspondingly. Wherein gear teeth are arranged on the gear, reverse gear teeth meshed with the gear teeth are arranged on the two sides of the gear respectively, and the reverse gear teeth are arranged on the paper bin. The printer internal paper limiting mechanism and the printer are simple in structure, the resistance can be flexibly adjusted according to paper types or operation environments, and the push-pull force of the paper limiting block can be flexibly adjusted.

Description

Technical Field

[0001] This disclosure relates to the field of spectroscopic instrument technology, and in particular to a paper limiting mechanism inside a printer. Background Technology

[0002] In a printer, the paper limiting mechanism is used to limit the paper and prevent it from shifting to the left or right during the printing process.

[0003] In existing technologies, paper-limiting mechanisms mostly use damping gears as core components. Through the meshing of the damping gear and the rack, the friction of the damper applies a fixed constraint force to the paper-limiting block. However, the friction force of the damping gear is predetermined by the material properties and structural design, making it impossible to flexibly adjust the pushing and pulling force of the paper-limiting block according to actual needs.

[0004] To solve the above problems, an internal paper limiting mechanism and printer were designed. Utility Model Content

[0005] The purpose of this disclosure is to overcome the shortcomings of the prior art and provide an internal paper limiting mechanism and printer that can flexibly adjust the resistance and the pushing and pulling force of the paper limiting block according to the paper type or operating environment.

[0006] To achieve the aforementioned objectives of this utility model, the present disclosure adopts the following technical solution:

[0007] A paper limiting mechanism inside a printer includes a housing, a paper tray inside the housing, and two symmetrically opened grooves on the circumferential sidewall of the paper tray. A first paper limiting block and a second paper limiting block are slidably installed in the two grooves respectively.

[0008] A gear is rotatably mounted on the outer circumferential wall of the paper bin, the gear being located between the two slide grooves. Racks are detachably mounted on the first paper limiting block and the second paper limiting block, and the gear meshes with the two racks respectively.

[0009] The gear is provided with a stop tooth, and the gear is provided with a reverse stop tooth on both sides, which meshes with the stop tooth. The reverse stop tooth is provided on the paper bin.

[0010] In one exemplary embodiment of this disclosure, the front and rear pressure angles of the stop teeth are equal; or,

[0011] The front and rear pressure angles of the stop teeth are not equal.

[0012] In one exemplary embodiment of this disclosure, the stop teeth are disposed on one of the two end faces of the gear.

[0013] In one exemplary embodiment of this disclosure, a gear frame is detachably provided on the circumferential outer wall of the paper bin, and the gear frame is used to limit the stop teeth.

[0014] In one exemplary embodiment of this disclosure, an elastic element is provided inside the housing, one end of the elastic element passes through the stop tooth and abuts against the gear, and the other end of the elastic element abuts against the inner wall of the housing.

[0015] In one exemplary embodiment of this disclosure, the tooth profile of the gear and the rack is one of straight teeth, helical teeth, or arc teeth.

[0016] In one exemplary embodiment of this disclosure, the reverse gear is integrally formed with the paper tray; or,

[0017] The reverse gear is detachably connected to the paper compartment.

[0018] In an exemplary embodiment of this disclosure, a first slider is slidably disposed in each of the two grooves, the first paper limiting block and the second paper limiting block are respectively connected to the first slider on the same side, and the two racks are respectively detachably connected to the first slider on the same side.

[0019] The two racks are located on opposite sides of the gear.

[0020] In an exemplary embodiment of this disclosure, a guide groove extending axially is provided on the circumferential inner wall of the paper tray, and a second slider is provided on the first paper limiting block and the second paper limiting block, and the second slider can reciprocate within the guide groove.

[0021] A printer comprising the internal paper limiting mechanism described in any of the preceding claims.

[0022] The beneficial effects of this disclosure are:

[0023] (1) This disclosure achieves the function of adjustable resistance when the paper block is pulled outward and reduced resistance when it is pressed inward by the interaction between the stop teeth on the gear and the reverse stop teeth on the paper bin. This enables flexible adjustment of resistance according to paper type or operating environment, and flexible adjustment of the pushing and pulling force of the paper block, thereby improving the ease of operation.

[0024] (2) The pressure angle, shape, distribution position and other parameters of the intermediate teeth in this disclosure can be designed in a variety of ways to adjust the different push and pull forces of the paper block and to optimize for different printer models or application scenarios.

[0025] (3) The elastic element buffers the gear and the stop tooth, reduces the hard impact between the stop tooth and the reverse tooth, reduces mechanical wear, extends the service life of the stop tooth, and maintains the stability of resistance adjustment.

[0026] (4) The present disclosure uses symmetrically arranged racks and paper limiting blocks to keep the paper roll centered during movement, reduce the risk of paper offset or paper jam, and improve printing accuracy and equipment reliability. Attached Figure Description

[0027] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0028] Figure 1 This is a front view of the paper limiting mechanism inside the printer in one embodiment of the present disclosure;

[0029] Figure 2 This is a rear view of the paper limiting mechanism inside the printer in one embodiment of the present disclosure;

[0030] Figure 3 This is a cross-sectional view of the paper limiting mechanism inside the printer in one embodiment of the present disclosure;

[0031] Figure 4 This is a schematic diagram of the structure of the gear and the stop teeth in one embodiment of the present disclosure.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Housing; 2. Paper tray; 3. Slide groove; 4. First paper limiting block; 5. Second paper limiting block; 6. Gear; 7. Rack; 8. Stop tooth; 9. Reverse stop tooth; 10. Gear frame; 11. Elastic element; 12. First slider; 13. Guide groove; 14. Second slider. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and therefore detailed descriptions of them will be omitted. Furthermore, the drawings are merely illustrative of this disclosure and are not necessarily drawn to scale.

[0035] Although relative terms such as "up" and "down" are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples shown in the accompanying drawings. It is understood that if the device of the icon is flipped upside down, the component described as "up" will become the component described as "down." When a structure is "up" of another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is "directly" mounted on the other structure, or that the structure is "indirectly" mounted on the other structure through another structure.

[0036] The terms “a,” “one,” “the,” “the,” and “at least one” are used to indicate the presence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” and “third,” etc., are used only as markers and are not a limitation on the number of objects.

[0037] This disclosure provides an internal paper limiting mechanism for a printer; see [link to relevant documentation]. Figures 1 to 4 The device includes a housing 1, inside which a paper compartment 2 is provided. Two symmetrical grooves 3 are opened on the circumferential side wall of the paper compartment 2. A first paper limiting block 4 and a second paper limiting block 5 are slidably installed in the two grooves 3 respectively. A gear 6 is rotatably arranged on the outer circumferential wall of the paper compartment 2, and the gear 6 is located between the two grooves 3. A rack 7 is detachably installed on the first paper limiting block 4 and the second paper limiting block 5 respectively. The gear 6 meshes with the two racks 7 respectively. The gear 6 is provided with a stop tooth 8. On both sides of the gear 6, there are reverse stop teeth 9 that mesh with the stop teeth 8. The reverse stop teeth 9 are provided on the paper compartment 2.

[0038] In this embodiment, the internal paper limiting mechanism of the printer consists of a housing 1, a paper tray 2, a first paper limiting block 4, a second paper limiting block 5, a gear 6, a rack 7, a stop gear 8, and a reverse stop gear 9. The paper tray 2 is installed inside the housing 1. Two axially extending slide grooves 3 are symmetrically formed on the circumferential sidewall of the paper tray 2. The two slide grooves 3 are coaxial. The first paper limiting block 4 and the second paper limiting block 5 are symmetrically slidably installed in the two slide grooves 3. The gear 6 is rotatably installed on the circumferential outer wall of the paper tray 2, and the gear 6 is located between the two slide grooves 3. Two axially extending racks 7 are slidably mounted on the upper side. The two racks 7 are located on one side of the same side slide groove 3. The first paper limiting block 4 or the second paper limiting block 5 on the same side of the two racks 7 are detachably connected. The gear 6 meshes with the two racks 7 respectively. The stop teeth 8 are mounted on the gear 6. The gear 6 has reverse stop teeth 9 installed on the outer wall of the paper bin 2 on both sides. The gear 6 meshes with the two reverse stop teeth 9 respectively to constrain the movement of the first paper limiting block 4 and the second paper limiting block 5, so as to adjust the push and pull force of the first paper limiting block 4 and the second paper limiting block 5.

[0039] Compared to existing damping gear and rack meshing methods, the internal paper limiting mechanism of this printer achieves adjustable resistance when the paper limiting block is pulled outward and reduced resistance when pressed inward through the interaction of the stop teeth on the gear and the reverse stop teeth on the paper tray. This allows for flexible adjustment of resistance based on paper type or operating environment, and flexible adjustment of the pushing and pulling force of the paper limiting block, improving operational convenience. The symmetrically arranged rack and paper limiting block ensure that the paper roll remains centered during movement, reducing the risk of paper deviation or paper jams, and improving printing accuracy and equipment reliability.

[0040] In one embodiment of this disclosure, the front and rear pressure angles of the stop teeth 8 are equal. This ensures uniform resistance between the first paper limiting block 4 and the second paper limiting block 5 during the pushing and pulling process, improving the constraint effect on the paper.

[0041] In one embodiment of this disclosure, the front and rear pressure angles of the stop teeth 8 are not equal. This allows for differentiated resistance between the first paper limit block 4 and the second paper limit block 5 during the pushing and pulling process, facilitating easy and effortless adjustment of their positions.

[0042] It is understandable that when the front and rear pressure angles of the stop teeth 8 are equal, the resistance of the paper limiting block in the pushing and pulling direction is uniform, which is suitable for scenarios requiring symmetrical operating force. When the front and rear pressure angles of the stop teeth 8 are not equal, the paper limiting block generates differentiated resistance in the pushing and pulling direction. When the first paper limiting block 4 and the second paper limiting block 5 are pulled outward, the pressure angle of the stop teeth 8 increases, and the friction or pressure generated by the contact between the stop teeth 8 and the reverse stop teeth 9 increases, providing greater resistance to fix the paper roll. When the first paper limiting block 4 and the second paper limiting block 5 are pressed inward, the pressure angle of the stop teeth 8 decreases, and the friction or pressure generated by the contact between the stop teeth 8 and the reverse stop teeth 9 decreases, thus reducing resistance and facilitating quick adjustment by the user.

[0043] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 4 The stop tooth 8 is set on one of the two end faces of the gear 6. In this way, the installation position of the stop tooth 8 can be flexibly adjusted, improving the space utilization of the housing 1.

[0044] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 2 and Figure 3 A gear frame 10 is detachably installed on the outer wall of the paper tray 2. The gear frame 10 is used to limit the position of the stop tooth 8. In this way, the position of the gear 6 and the stop tooth 8 can be limited, the contact pressure between the gear 6 and the rack 7, and between the stop tooth 8 and the reverse stop tooth 9 can be controlled, so as to ensure the precise meshing between the gear 6 and the rack 7, and between the stop tooth 8 and the reverse stop tooth 9.

[0045] Optionally, a locking block is provided on the outer wall of the paper tray 2, and the gear frame 10 is locked onto the locking block.

[0046] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 2 and Figure 3 An elastic element 11 is provided inside the housing 1. One end of the elastic element 11 passes through the stop tooth 8 and abuts against the gear 6, while the other end of the elastic element 11 abuts against the inner wall of the housing 1. In this way, the pressure between the gear 6 and the rack 7, and the pressure between the stop tooth 8 and the reverse tooth 9 can be adjusted, which facilitates the meshing transmission between the gear 6 and the rack 7, and between the stop tooth 8 and the reverse tooth 9.

[0047] Optionally, the elastic element 11 is a spring or an elastic sheet.

[0048] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 4 A sleeve is provided on the side wall of the reverse gear 9 away from the gear 6. The sleeve is coaxially arranged with the gear 6 and the reverse gear 9. The elastic element 11 passes through the sleeve and the reverse gear 9 in sequence and abuts against the gear 6. In this way, the elastic element 11 can be limited and prevented from deviating.

[0049] In one embodiment of this disclosure, the gear 6, rack 7, and reverse gear 9 have tooth profiles that are straight, helical, or curved. This allows for adaptation to diverse transmission requirements, improving transmission efficiency and stability.

[0050] In one embodiment of this disclosure, the reverse stop tooth 9 is integrally formed with the paper compartment 2. This improves the strength of the reverse stop tooth 9, ensures precise matching between the reverse stop tooth 9 and the stop tooth 8, and enhances the reliability of the paper limiting mechanism.

[0051] In one embodiment of this disclosure, the reverse gear 9 is detachably connected to the paper tray 2. This allows for easy replacement of the reverse gear 9, reducing maintenance costs; it also facilitates the replacement of reverse gear 9 with different specifications to adapt to different gears 8 or paper types, thus expanding the application range.

[0052] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 and Figure 2 Two sliding blocks 12 are slidably disposed in the two sliding grooves 3 respectively. The first paper limiting block 4 and the second paper limiting block 5 are respectively connected to the first paper limiting block 12 on the same side. Two racks 7 are detachably connected to the first paper limiting block 12 on the same side respectively. The two racks 7 are located on both sides of the gear 6. In this way, the racks 7 can be limited and guided, which facilitates the meshing and transmission between the gear 6 and the racks 7, and facilitates the movement of the first paper limiting block 4 and the second paper limiting block 5.

[0053] Optionally, the first slider 12 is connected to the rack 7 by screws.

[0054] In one embodiment of this disclosure, see [link to relevant documentation]. Figure 1 and Figure 3 The paper tray has axially extending guide grooves 13 on its inner wall. Second sliders 14 are respectively provided on the first paper limiting block 4 and the second paper limiting block 5, and the second sliders 14 can reciprocate within the guide grooves 13. This guides the first paper limiting block 4 and the second paper limiting block 5, improving the stability of their movement.

[0055] In one embodiment of this disclosure, there is one paper limiting block and one toothed rack 7. The paper roll is limited by one paper limiting block, and the paper roll is not centered.

[0056] In another embodiment of this disclosure, gear 6 is not provided with stop teeth 8, and reverse stop teeth 9 are provided on both sides of gear 6. Gear 6 and reverse stop teeth 9 mesh with each other. Gear frame 10 is used to limit gear 6, and elastic member 11 passes through gear frame 10 and abuts against gear 6. In this way, through the meshing transmission between gear 6 and reverse stop teeth 9, the first limiting paper block 4 and the second limiting paper block 5 are constrained, and the friction force between gear 6 and reverse stop teeth 9 is adjusted by elastic member 11.

[0057] Optionally, the reverse gear 9 is arranged coaxially with the slide groove 3.

[0058] In one embodiment of this disclosure, see Figures 1 to 4 The working process of the internal paper limiting mechanism of this printer is briefly described as follows:

[0059] In use, the gear 6 with the stop tooth 8 is first rotatably mounted on the paper bin 2, the first paper limiting block 4 and the second paper limiting block 5 are slidably mounted in the two slide grooves 3, and the two racks 7 are respectively mounted on the first paper limiting block 4 and the second paper limiting block 5. The stop tooth 8 and the gear 6 are pressed by the gear frame 10 and the elastic element 11 respectively, so that the stop tooth 8 and the reverse stop tooth 9 mesh with each other, so that the gear 6 meshes with the two racks 7 respectively. Friction is formed between the stop tooth 8 and the reverse stop tooth 9. When the first paper limiting block 4 and the second paper limiting block 5 are pulled outward or pressed inward, the first paper limiting block 4 and the second paper limiting block 5 have a good constraint effect, which facilitates the movement of the first paper limiting block 4 and the second paper limiting block 5.

[0060] This disclosure provides a printer that includes the internal paper limiting mechanism described in any of the above embodiments.

[0061] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of the utility models disclosed herein. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the appended claims.

Claims

1. A paper end sensor for a printer, comprising: The paper limiting mechanism comprises a shell (1), a paper bin (2) is arranged in the shell (1), two slide grooves (3) are symmetrically arranged on the circumferential side wall of the paper bin (2), a first paper limiting block (4) and a second paper limiting block (5) are respectively slidably arranged in the two slide grooves (3); A gear (6) is rotatably arranged on the circumferential outer wall of the paper bin (2), the gear (6) is located between the two slide grooves (3), a rack (7) is detachably arranged on the first paper limiting block (4) and the second paper limiting block (5) respectively, and the gear (6) is meshed with the two racks (7) respectively. The gear (6) is provided with a gear tooth (8), the gear (6) is provided with a reverse gear tooth (9) on the two sides and is meshed with the gear tooth (8), and the reverse gear tooth (9) is arranged on the paper bin (2).

2. The printer internal paper limiting mechanism according to claim 1, wherein, The front and rear pressure angles of the gear tooth (8) are equal. The front and rear pressure angles of the gear tooth (8) are not equal.

3. The printer internal paper limiting mechanism of claim 1, wherein, The gear tooth (8) is arranged on one of the two side end faces of the gear (6).

4. The printer internal paper limiting mechanism of claim 1, wherein, A gear frame (10) is detachably arranged on the circumferential outer wall of the paper bin (2), and the gear frame (10) is used for limiting the gear tooth (8).

5. The printer internal paper limiting mechanism of claim 1, wherein, An elastic member (11) is arranged in the shell (1), one end of the elastic member (11) abuts against the gear (6) through the gear tooth (8), and the other end of the elastic member (11) abuts against the inner wall of the shell (1).

6. The printer internal paper limiting mechanism of claim 1, wherein, The gear shape of the gear (6) and the rack (7) is one of straight teeth, helical teeth or arc teeth.

7. The printer internal paper limiting mechanism of claim 1, wherein, The reverse gear tooth (9) is integrally formed with the paper bin (2); or, The reverse gear tooth (9) is detachably connected with the paper bin (2).

8. The printer internal paper limiting mechanism of claim 1, wherein, First sliding blocks (12) are slidably arranged in the two slide grooves (3) respectively, the first paper limiting block (4) and the second paper limiting block (5) are connected with the first sliding blocks (12) on the same side respectively, and the two racks (7) are detachably connected with the first sliding blocks (12) on the same side respectively. The two racks (7) are located on the two sides of the gear (6) respectively.

9. The printer internal paper limiting mechanism of claim 1, wherein, A guide groove (13) extending in the axial direction is arranged on the circumferential inner wall of the paper bin (2), second sliding blocks (14) are arranged on the first paper limiting block (4) and the second paper limiting block (5) respectively, and the second sliding blocks (14) can reciprocate in the guide groove (13).

10. A printer characterized by comprising: The printer internal paper limiting mechanism comprises any one of claims 1 to 9.

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