CN116852879A - Printer cover assembly and printer - Google Patents

Abstract

The utility model provides a cover assembly of a printer and the printer. The cover assembly comprises a cover body, two limiting parts and a gear, wherein the limiting parts of the two limiting parts are positioned outside the cover body and are oppositely arranged in the paper width direction; the rack parts of the limiting piece are connected with the limiting part, the limiting piece is movably arranged on the cover body along the paper width direction, and the two rack parts are meshed with the gear; the limiting piece is provided with a spring buckle, and the cover body is provided with at least two buckling positions which are arranged at intervals along the paper width direction. The printer comprises a machine body and a cover assembly, wherein the cover assembly is rotationally connected with the machine body; the cover assembly adopts the cover assembly. According to the utility model, the elastic buckle and the buckling position are arranged on the limiting piece and the cover body, and the elastic buckle enters the buckling position to prevent the limiting piece from continuing to advance and give a user a touch feedback, so that the position of the target paper width is known. According to the utility model, the sliding and pushing operation of the limiting piece is more easily completed when a user adjusts the paper width, and the operation difficulty is reduced so as to improve the use experience.

Description

Printer cover assembly and printer

Technical Field

The utility model relates to the technical field of printers, in particular to a cover assembly of a printer for improving use experience and the printer.

Background

The Chinese patent publication No. CN218430606U discloses a paper printer, which is covered with a limiting piece, and the limiting piece is matched with different clamping groups, so that the width of paper can be adjusted, and different papers can be adapted. However, the clamping group and the limiting piece are required to be disassembled, assembled and replaced during adjustment, and the adjustment operation difficulty is high.

The Chinese patent publication No. CN 215401984U discloses a scroll sliding baffle of an intelligent label printer, and the paragraph 0017 of CN 215401984U describes that scroll is firstly placed between moving plates, the moving plates are adjusted to the corresponding width of paper, namely, centering symmetrical fixation is realized, so that synchronous sliding of baffles at two sides can be realized through a rack and pinion assembly and the width of the scroll is adapted to the width of the placed scroll, and then, rapid stepless width adjustment can be performed according to the width of the scroll with multiple specifications.

It is desirable to incorporate a rack and pinion type slide shutter of a label printer to a paper printer to reduce the difficulty of operation of width adjustment. However, unlike label printers that use paper rolls, the paper printer cannot slip the stop member and reach the target paper width position with the flexible paper as the basis for adjustment. Therefore, although the rack-and-pinion type slide shutter is used to adjust the width of the sheet, the sheet is difficult to accurately reach the target sheet width position when the structure is incorporated into a sheet printer.

Disclosure of Invention

A first object of the present utility model is to provide a cover assembly of a printer that reduces the difficulty of operation to enhance the user's operation experience.

The second objective of the present utility model is to provide a printer that reduces the difficulty of operation to enhance the user's experience of operation.

The cover assembly of the printer comprises a cover body, two limiting parts and a gear, wherein the limiting parts comprise limiting parts which are positioned outside the cover body and are oppositely arranged in the paper width direction; the gear is rotationally connected to the cover body along the axle center; the limiting piece further comprises a rack part, the rack part is connected with the limiting part, the limiting piece is movably arranged on the cover body along the paper width direction, and the rack parts of the two limiting pieces are meshed with the gears; the limiting piece is provided with a spring buckle, the cover body is provided with at least two buckling positions which are arranged at intervals along the paper width direction, or the cover body is provided with a spring buckle, and the limiting piece is provided with at least two buckling positions which are arranged at intervals along the paper width direction; the elastic buckle is matched with the buckling position.

According to the technical scheme, after the gear rack baffle structure is combined with the cover assembly of the paper printer, in order to solve the problem that the width is difficult to fix in the process of sliding the limiting piece, the elastic buckle and the plurality of buckling positions are arranged on the limiting piece and the cover body to match, after a user pushes the limiting piece by hand, after the limiting piece reaches a certain paper width position, the elastic buckle can generate acting force for preventing the limiting piece from advancing and give the user touch feedback after entering the buckling position, so that the position of the target paper width is reached, and the limiting piece is kept at the current paper width position. Therefore, the sliding and pushing operation of the limiting piece is more easily completed when the user adjusts the paper width, and the operation difficulty is reduced so as to improve the use experience.

The cover body comprises a first cover plate and a second cover plate which are connected along the thickness direction of the cover body, an installation space is formed between the first cover plate and the second cover plate, and a sliding communication port is formed in the first cover plate; the gear and the rack part are arranged in the installation space, and the limiting part extends out of the cover body through the sliding communication port.

Therefore, the rack and pinion is exposed out of the cover body, so that the appearance is affected, and the action parts are not protected, so that the service life is shortened. Therefore, the structure of the cover body is improved, the cover body is split into the first cover plate and the second cover plate which are connected in a superposition manner along the thickness direction, and the gear rack actuating mechanism is arranged in an internal installation space formed between the first cover plate and the second cover plate, so that the gear rack actuating mechanism is hidden in the cover body, the gear rack actuating mechanism can be protected, and the exposed mechanical structure can be prevented from influencing the appearance of a product.

Still further, the spacing piece includes the sliding fit portion, the sliding fit portion connects between rack portion and spacing portion, and the sliding fit portion locates in the installation space; the cover body comprises a chute arranged in the installation space, and the sliding fit part is in sliding fit with the chute along the paper width direction; at least a part of the sliding fit part is provided with a plate structure, and the thickness direction of the plate structure is consistent with the thickness direction of the cover body.

As described above, the cover body is required to have a small thickness in the demand of the small-sized design and the design of the paper printer. And it is also necessary to consider how to reduce the influence on the thickness of the cover as much as possible after the rack-and-pinion type slide shutter is coupled to the inside of the cover. Therefore, the structure of the limiting piece is improved, the plate structure is provided with the sliding fit part to enlarge the fit area between the sliding fit part and the cover body, so that the sliding fit part is more fully limited, deflection is avoided, sliding straightness is guaranteed, and the influence on the thickness of the cover body can be reduced as much as possible due to the fact that the thickness direction of the plate structure is consistent with the thickness direction of the cover body, and therefore the small-size design of products is facilitated, and the design requirements of appearance are met.

Still further, the spacing piece comprises a connecting section, the plate structure, the connecting section and the spacing part are sequentially connected along the thickness direction of the plate structure, the size of the connecting section is smaller than the size of the plate structure and smaller than the size of the spacing part in the third direction, and the third direction is perpendicular to the paper width direction and the thickness direction of the cover body; the connecting section is positioned in the sliding communication port, and the first cover plate is limited between the plate structure and the limiting part.

From the above, the degree of freedom of the lower limit piece is more effectively limited to prevent the lower limit piece from being disengaged, and the limit piece can be prevented from being twisted to cause the rack and the gear to be disengaged when a user pushes the limit part.

In a further scheme, the sliding communication port comprises a wide part and a narrow part which are sequentially arranged along the paper width direction, and the size of the wide part is larger than that of the narrow part in the third direction; the connecting section is positioned in the narrow part; the limit part can pass through the wide part.

From the above, this arrangement makes the installation of the stopper required to pass through the first cover plate simpler, and the stopper is fitted with the narrow portion after the installation is completed to ensure a tight fit.

In another further scheme, the sliding fit part further comprises a strip-shaped structure; the plate structure, the strip-shaped structure and the rack part are sequentially connected along the paper width direction, and the size of the plate structure is larger than that of the strip-shaped structure in the third direction; the chute comprises a first chute portion and a second chute portion, the first chute portion is in sliding fit with the plate structure, and the second chute portion is in sliding fit with the strip structure.

From the above, the two rack parts are meshed with the gear, so that the gear is generally used as an axisymmetric center between the two rack parts, under the arrangement, the rack parts cannot be arranged into a plate shape like a sliding fit part and can only be arranged into a strip shape because the gear and rack action mechanism is close to the edge of the cover body and the arrangement space in the third direction is limited, otherwise, the two limiting parts can interfere with each other before and after moving; in addition, because the printer is smaller in volume, in fact, the whole limiting piece is slender, and in order to ensure that the limiting piece moves stably along a straight line to ensure stable meshing with the gear, the sliding fit part is provided with a strip structure which is closer to the rack part and has smaller size besides the plate structure, and the strip structure can avoid the situation that two limiting pieces possibly interfere with each other after moving, and further can save materials; further, the sliding grooves are arranged to be the first sliding grooves and the second sliding grooves with different groove widths corresponding to the plate structures and the strip-shaped structures, the second sliding grooves can be in sliding fit with the strip-shaped structures, the straightness of movement of the rack portions is further guaranteed, and the movement flow and transmission are guaranteed to be accurate.

The further scheme is that the elastic buckle is arranged on the strip-shaped structure, and the buckling position is arranged on the first cover plate or the second cover plate; the elastic buckle comprises an elastic arm and a buckle, wherein the elastic arm extends along the paper width direction, and the buckle is connected to the elastic deformation part of the elastic arm.

From the above, the plate structure and the limiting part are arranged oppositely and are matched with the first cover plate, so that the elastic buckle is arranged on the strip structure, and the installation difficulty is reduced; the spring arm is arranged along the paper width direction, so that the spring arm can cause spring buckling deformation easily when the limiting piece is pushed, and the operation is further easy.

Further, the cover assembly further includes a tray member telescopically disposed in the mounting space.

From the above, the tray can increase the bearing length, and avoid the paper to bend downwards or even slide. More importantly, the cover body comprises the first cover plate and the second cover plate which are connected along the thickness direction of the cover body, and the installation space is formed between the first cover plate and the second cover plate as a premise.

The printer provided by the second object of the utility model comprises a machine body and a cover assembly, wherein the cover assembly is rotationally connected with the machine body; the cover assembly adopts the cover assembly.

According to the scheme, after the user pushes the limiting part by hand, the limiting part reaches a certain paper width position, the elastic buckle can generate acting force for preventing the limiting part from advancing after entering the buckling position and gives the user tactile feedback, so that the user knows that the target paper width position is reached and the limiting part is kept at the current paper width position. The sliding and pushing operation of the limiting piece is finished more easily when the user adjusts the paper width, and the operation difficulty is reduced so as to improve the use experience.

The further scheme is that a first magnetic attraction piece is arranged on the cover assembly, a second magnetic attraction piece is arranged on the machine body, and the first magnetic attraction piece is attracted with the second magnetic attraction piece.

From the above, the operation of the upper flip cover is easily completed by the arrangement, and the use experience is improved.

Drawings

Fig. 1 is a block diagram of a first state of an embodiment of the printer of the present utility model.

Fig. 2 is a block diagram of a second state of the printer embodiment of the present utility model.

Fig. 3 is a block diagram of a third state of the printer embodiment of the present utility model.

Fig. 4 is an enlarged view at a in fig. 2.

Fig. 5 is an exploded view of the cover assembly in the printer embodiment of the present utility model.

Fig. 6 is a block diagram of a first cover plate in an embodiment of the printer of the present utility model.

Fig. 7 is a block diagram of a first view of a stop member in an embodiment of a printer according to the present utility model.

Fig. 8 is a block diagram of a second view of the stop member in an embodiment of the printer of the present utility model.

FIG. 9 is a cross-sectional view of the first cover plate and the stopper in the paper width direction in an embodiment of the printer of the present utility model.

FIG. 10 is a schematic view of a stop member in a first paper width position in an embodiment of a printer according to the present utility model.

FIG. 11 is a schematic view of a stop member in a second paper width position in an embodiment of the printer of the present utility model.

FIG. 12 is a block diagram of a second cover plate and tray member in an embodiment of the printer of the present utility model.

Detailed Description

Referring to fig. 1 to 3, the present embodiment is a paper printer, the printer includes a machine body 1 and a cover assembly 2 rotatably mounted on the top of the machine body 1, the cover assembly 2 is configured as a flip cover, after the cover assembly 2 is turned upwards, a paper inlet 101 on the top of the machine body 1 is exposed, paper can be fed into the machine body 1 from the paper inlet 101 for printing, and the cover assembly 2 can be used as a supporting structure for the paper, two limiting members 3 are disposed on the cover assembly 2 in opposite directions along the paper width direction, a paper passing position 300 is formed between the two limiting members 3, the distance between the two limiting members 3 limits the width of the passable paper, the distance between the two limiting members 3 is adjustable, and the limiting members 3 are designed into a bent shape and can also limit the thickness of the paper. In addition, the cover assembly 2 has a distal end remote from the body 1, on which is provided a telescopic tray member 28, the tray member 28 serving to lengthen the cover assembly, ensuring a sufficiently long bearing surface to avoid bending the sheet downwards and even slipping off the back of the cover assembly 2.

The cover assembly 2 is provided with two limiting pieces 3 which can be slidably adjusted and also provided with a telescopic tray piece 28, and as shown in fig. 1, under the design requirement of a paper printer, the cover assembly 2 is required to be integrally thin-walled and the outer surface of the cover assembly 2 is as flat as possible, so that the utility model solves the design scheme of sliding paper width adjustment of the limiting pieces 3 and simultaneously maintains the thin-walled design and the flat appearance design of the cover assembly 2.

In each drawing, a uniform rectangular space coordinate system is established, wherein the x-axis direction in the coordinate system represents the paper width direction of the utility model, the y-axis direction represents the third direction of the utility model, and the z-axis direction represents the thickness direction of the cover body and the thickness direction of the sliding fit part of the utility model.

Referring to fig. 2 and 5, the cap assembly 2 includes a cap body 20, two stoppers 3, a gear 4, a tray member 28, and two first magnetic attraction members 29. First, the cover 20 includes a first cover 21 and a second cover 22, the first cover 21 and the second cover 22 are stacked and fastened to each other in a thickness direction of the cover 20 to form the cover 20, and an installation space 200 inside the cover 20 is formed between the first cover 21 and the second cover 22. Referring to fig. 5, in the present embodiment, the first cover 21 and the second cover 22 cover the cover 20, that is, the first cover 21 and the second cover 22 extend between both sides of the length and both sides of the width of the cover 20, so that the installation space 200 formed between the first cover 21 and the second cover 22 is sufficiently large, and as shown in fig. 5, the two limiting members 3, the gear 4, the tray member 28 and the two first magnetic members 29 are disposed in the installation space 200. In addition, the arrangement of the first cover plate 21 and the second cover plate 22 covering the cover body 20 also considers the appearance requirement of the printer, and the arrangement makes the opposite sides of the cover body 20 have relatively complete and flat surfaces.

The utility model realizes the sliding adjustment of the limiting piece 3 by utilizing the gear rack movement mechanism. Referring to fig. 5 to 7, the gear 4 is rotatably connected to the first cover 21 along an axis, the rotation axis of the gear 4 extends in the thickness direction of the cover 20, and the gear 4 is located at a central position in the paper width direction. The limiting piece 3 comprises a rack part 31, a sliding matching part 32 and a limiting part 33 which are sequentially connected, the first cover plate 21 comprises rib groups 214 protruding from the inner side surface of the first cover plate, and a sliding groove 210 arranged along the paper width direction is formed between the rib groups 214; the two limiting members 3 are symmetrically arranged in the installation space 200 by taking the gear 4 as a central axis, the sliding matching parts 32 of the two limiting members 3 are respectively positioned in the two sliding grooves 210, and the two rack parts 33 are meshed with the gear 4. Referring to fig. 4 again, the first cover plate 21 is provided with a sliding communication port 211; the gear 4, the rack portion 31, and the slip fit portion 32 are provided in the installation space 200, and the stopper portion 33 protrudes to the outside of the cover 20 through the slip communication port 211. Under this setting, after the user toggles spacing portion 33 with the hand, two locating parts 3 can be along the direction synchronous slip that is close to each other or keeps away from each other, can guarantee that the paper between two spacing portions 33 is placed in the middle all the time when realizing paper width adjustment. Wherein preferably a damping gear is used for the gear 4.

In order to bring better use experience, and further, in order to enable a user to perceive that the target paper width position is reached in the process of sliding and adjusting the limiting piece 3, the utility model makes corresponding improvement. First, referring to fig. 3 and 4, a plurality of paper width scale symbols 219 are disposed on the outer surface of the first cover 21, the plurality of paper width scale symbols 219 respectively correspond to A5, B5W, A, LTR and other paper widths, and when the printer is in the use state shown in fig. 2 or 3, the outer surface of the first cover 21 faces the user, and the plurality of paper width scale symbols 219 can be clearly seen.

Then, referring to fig. 6 to 8, the snap 35 is provided on the slip fit portion 32, the snap 35 includes a snap arm 351 and a snap 352, the snap arm 351 extends in the paper width direction, and the snap 352 is connected to an elastically deformed portion of the snap arm 351 and protrudes in the thickness direction of the slip fit portion 32. The first cover 21 is provided with a plurality of concave buckling positions 212 on the inner side surface facing the installation space 200, the concave buckling positions 212 are arranged at intervals along the paper width direction, and the intervals between the concave buckling positions 212 are consistent with the intervals between the scale marks of the plurality of paper width scale marks 219. When the limiting member 3 is installed, the protruding buckle 352 on the elastic buckle 35 can be buckled into the buckling position 212. Referring to fig. 10 and 11 again, since the outer surface of the buckle 352 and the inner surface of the buckling position 212 are both configured to be arc-shaped, when the user pushes the limiting member 3 and moves the limiting member 3 along the paper width direction, the spring arm 351 is forced to swing and the buckle 352 is withdrawn from the buckling position 212 until the buckle 352 enters the next buckling position 212, and the limiting portion 33 just moves to a position aligned with the next paper width scale symbol 219. And when the buckle 352 enters the buckling position 212 again, the vibration of the buckle 35 and the vibration generated by collision with the first cover plate 21 are transmitted to the hand of the user, and the user hears the sound generated by the vibration, so that the user can determine that the limit piece 3 has reached the target paper width position by any one or more of vision, hearing and touch. Therefore, the setting can ensure that the limiting piece 3 accurately reaches the target paper width position, the user can easily judge that the limiting piece reaches the target paper width position, and the use experience is improved.

Referring to fig. 7 and 8, the slip-fit portion 32 includes a plate structure 321 and a bar structure 322, and the plate structure 321, the bar structure 322 and the rack portion 31 are sequentially connected in the paper width direction. Wherein, the strip-shaped structure 322 and the rack part 31 are both extended along the paper width direction, and the rack part 31 is continued to the extension end of the strip-shaped structure 322; in the third direction indicated by the y-axis direction, the size of the plate structure 321 is larger than that of the bar structure 322, and the plate structure 321 has a larger surface area relative to the bar structure 322 and the rack portion 31. In addition, the snap 35 is disposed on the bar structure 322. Correspondingly, the chute 210 on the first cover plate 21 includes a first chute portion 2101 and a second chute portion 2102, the first chute portion 2101 is slidably engaged with the plate structure 321, and the second chute portion 2102 is slidably engaged with the bar structure 322.

Referring to fig. 4, 7 and 8, the restricting portion 33 includes a width restricting portion 331 and a thickness restricting portion 332 which are connected by bending, the width restricting portion 331 extending perpendicular to the paper width direction and being capable of restricting the paper in the paper width direction; the thickness limiting portion 332 is bent from the end of the width limiting portion 331 away from the slip fit portion 32, and a certain interval is provided between the thickness limiting portion 332 and the slip fit portion 32, in which interval the overlapped sheets are to be located, so that the size of the interval limits the thickness of the stacked sheets.

In addition, the sliding fit portion 32 further includes a connecting section 34, and the plate structure 321, the connecting section 34 and the width-limiting portion 331 are sequentially connected along the thickness direction of the plate structure 321, in fact, the connecting section 34 and the width-limiting portion 331 are different portions on the same wall, and in the third direction indicated by the y-axis direction, the size of the connecting section 34 is smaller than the size of the plate structure 321 and smaller than the size of the width-limiting portion 331, and this arrangement makes a fit space 340 between the plate structure 321 and the width-limiting portion 331 and at both sides of the connecting section 34. Referring to fig. 9, when the connection section 34 is located in the narrow portion 2111 of the sliding communication port 211, the first cover plate 21 is restricted in the fitting space 340 between the plate structure 321 and the restricting portion 33. In addition, in order to enhance structural strength, reinforcing ribs 333 are connected between the connecting sections 34 and the plate structure 321, which are perpendicular to each other.

Referring again to fig. 6, the slide communication port 211 includes a wide portion 2112 and the above-described narrow portion 2111, which are sequentially arranged in the paper width direction, and the size of the wide portion 2112 is larger than the size of the narrow portion 2111 in the third direction indicated by the y-axis direction. When the cover assembly is used normally, the connecting section 34 is positioned in the narrow portion 2111, and the first cover plate 21 is limited between the plate structure 321 and the limiting portion 33, and the limiting portion 33 cannot pass through the sliding communication port 211; when the retainer 3 is slid and the connecting section 34 reaches the wide portion 2112, the first cover 21 is no longer located between the plate structure 321 and the limit portion 33, and since the inner peripheral contour of the wide portion 2112 is larger than the outer peripheral contour of the limit portion 33, the limit portion 33 can pass through the wide portion 2112, and the retainer 3 can be assembled and disassembled based on this.

On the other hand, after the stopper 3 is provided in the inside of the cover 20 in a built-in manner, the stopper 3 built-in the cover 20 is also provided with a thinner thickness in order to meet the design requirement of the thinner thickness of the cover 20, and the stopper 3 is actually required to be provided as an elongated member in the requirement of wide width adjustment and in the limitation of the provision of one side of the cover 20. And the limiting piece 3 is molded by plastic in multiple purposes, and the slender and thinner limiting piece 3 can cause deformation due to insufficient structural strength, so that the problem of transmission failure is caused.

To this end, the present utility model is modified accordingly, and first, the end of the slip-fit portion 32 remote from the gear 4 is provided as a plate structure 321 having a large area. In comparison with fig. 10 and 11, since the plate structure 321 is far from the gear 4, the plate structure 321 does not interfere with the other stopper 3 even if the area of the plate structure 321 is large. The plate structure 321 is used for arranging the sliding fit part 32 so as to enlarge the fit area between the sliding fit part 32 and the cover body 20, so that the sliding fit part 32 is more fully limited, and the deflection of the limiting piece 3 is avoided; referring to fig. 9 again, since the thickness direction of the plate structure 321 coincides with the thickness direction of the cover 20, the influence on the thickness of the cover 20 can be reduced as much as possible.

Further, the strip-shaped structure 322 which is closer to the rack portion 31 and smaller in size is further arranged, the situation that mutual interference is likely to occur before and after the two limiting pieces 3 move can be avoided due to the arrangement of the strip-shaped structure 322, the sliding grooves 210 correspond to the first sliding grooves 2101 and the second sliding grooves 2102 which are different in groove width and are formed in the mode that the plate structure 321 and the strip-shaped structure 322 are arranged, the second sliding grooves 2102 can be in sliding fit with the strip-shaped structure 322, bending deformation of the strip-shaped structure 322 is prevented, the straightness of movement of the rack portion 31 is further guaranteed, and the movement flow and transmission accuracy are guaranteed.

In addition, referring to fig. 10, when the stopper 3 is at the maximum paper width position farthest from the gear 4, the rack portion 31 is still engaged with the gear 4. It can be seen that the rack portion 31 is always in engagement with the gear wheel 4 to avoid transmission failure.

Referring to fig. 12 in combination with fig. 5, a tray bin 220 is disposed on the second cover plate 22 toward the inner side of the installation space 200, the tray bin 220 is formed by surrounding ribs 221 of a "U" shape, the opening direction of the tray bin 220 is a third direction, the ribs 221 are disposed on both left and right sides of the tray bin 220 in the paper width direction with bayonets 222, and each side rib is disposed with two bayonets 222 disposed at intervals along the third direction. The tray 28 is provided with elastic beams 281 on both sides in the paper width direction, and a catching boss 282 is provided on the extending middle portion of the elastic beams 281. The tray 28 is placed within the tray magazine 220 and the tray 28 is movable in a third direction between a retracted position and an extended position.

The tray 28 shown in fig. 12 and 2 is in the retracted position, in which most of the tray 28 is received in the tray compartment 220 and only the pulling portion thereof is exposed to the cover 20, and in which the latch 282 is engaged with the bayonet 222 remote from the opening of the tray compartment 220; the tray member 28 is shown in the extended position in fig. 3, in which the tray member 28 is largely extended outside the cover 20, and in which the latch 282 is engaged by another bayonet 222 adjacent the opening of the tray magazine 220. The ribs 221 guide the tray 28 to ensure smooth linear movement of the tray 28 in the third direction, and the cooperation of the bayonet 282 and the bayonet 222 allows the tray 28 to be held in position and to be stretched into position.

In addition, referring to fig. 3 and 4, a plurality of approximately triangular protrusion structures 218 are further provided on the outer surface of the first cover plate 21, the protrusion structures 218 are disposed between the stopper 3 and the paper inlet 101, the protrusion structures 218 are disposed at intervals in the paper width direction, and the curved inclined surfaces of the protrusion structures 218 are disposed toward the paper passing position 300. With this arrangement, the sheet in the sheet passing position 300 can enter the sheet inlet 101 more smoothly under the guidance of the inclined surface of the projection structure 218, avoiding the occurrence of paper jam.

In addition, referring to fig. 1, two second magnetic attraction pieces 19 are disposed on the body 19, and when the cover assembly 2 is in the closed state, the two second magnetic attraction pieces 19 are respectively attracted to the first magnetic attraction pieces 29 on the two cover assemblies 2. In this embodiment, the first magnetic attraction member 29 and the second magnetic attraction member 19 are both magnets.

In other embodiments, the snap fastener is disposed on the cover and the plurality of fastening locations are disposed on the limiting member.

In other embodiments, the stop and gear are disposed entirely outside the cover.

In other embodiments, only one of the first cover plate and the second cover plate covers the whole area of the cover body, and the other cover only a part of the cover body, but the lower tray member cannot be disposed in the installation space.

In other embodiments, the slip fit portion does not include a plate structure but is generally elongated.

Finally, it should be emphasized that the foregoing description is merely illustrative of the preferred embodiments of the utility model, and that various changes and modifications can be made by those skilled in the art without departing from the spirit and principles of the utility model, and any such modifications, equivalents, improvements, etc. are intended to be included within the scope of the utility model.

Claims (10)

1. The cover assembly of the printer comprises a cover body and two limiting parts, wherein the limiting parts comprise limiting parts, and the two limiting parts are positioned outside the cover body and are oppositely arranged in the paper width direction;

the method is characterized in that:

the cover body is connected with the cover body in a rotating way along the axis;

the limiting piece further comprises a rack part, the rack part is connected with the limiting part, the limiting piece is movably arranged on the cover body along the paper width direction, and the rack parts of the two limiting pieces are meshed with the gears;

the limiting piece is provided with a snap fastener, the cover body is provided with at least two buckling positions which are arranged at intervals along the paper width direction, or the cover body is provided with a snap fastener, and the limiting piece is provided with at least two buckling positions which are arranged at intervals along the paper width direction;

the elastic buckle is matched with the buckling position.

2. The cover assembly of a printer as in claim 1, wherein:

the cover body comprises a first cover plate and a second cover plate which are connected along the thickness direction of the cover body, an installation space is formed between the first cover plate and the second cover plate, and a sliding communication port is formed in the first cover plate;

the gear and the rack part are arranged in the installation space, and the limiting part extends out of the cover body through the sliding communication port.

3. The cover assembly of a printer as in claim 2, wherein:

the limiting piece comprises a sliding fit part, the sliding fit part is connected between the rack part and the limiting part, and the sliding fit part is positioned in the installation space;

the cover body comprises a chute arranged in the installation space, and the sliding fit part is in sliding fit with the chute along the paper width direction;

at least a part of the sliding fit part is provided with a plate structure, and the thickness direction of the plate structure is consistent with the thickness direction of the cover body.

4. A cover assembly for a printer according to claim 3, wherein:

the limiting piece comprises a connecting section, the plate structure, the connecting section and the limiting part are sequentially connected along the thickness direction of the plate structure, the size of the connecting section is smaller than that of the plate structure and smaller than that of the limiting part in the third direction, and the third direction is perpendicular to the paper width direction and the thickness direction of the cover body;

the connecting section is positioned in the sliding communication port, and the first cover plate is limited between the plate structure and the limiting part.

5. The cover assembly of a printer as in claim 4, wherein:

the sliding communication port comprises a wide part and a narrow part which are sequentially arranged along the paper width direction, and the size of the wide part is larger than that of the narrow part in the third direction;

the connecting section is positioned in the narrow part;

the limit part can pass through the wide part.

6. The cover assembly of a printer as in claim 4, wherein:

the sliding fit part also comprises a strip-shaped structure;

the plate structure, the strip-shaped structure and the rack part are sequentially connected along the paper width direction, and the size of the plate structure is larger than that of the strip-shaped structure in the third direction;

the sliding groove comprises a first sliding groove part and a second sliding groove part, the first sliding groove part is in sliding fit with the plate structure, and the second sliding groove part is in sliding fit with the strip structure.

7. The cover assembly of a printer as in claim 6, wherein:

the elastic buckle is arranged on the strip-shaped structure, and the buckling position is arranged on the first cover plate or the second cover plate;

the elastic buckle comprises an elastic arm and a buckle, wherein the elastic arm extends along the paper width direction, and the buckle is connected to the elastic deformation part of the elastic arm.

8. The cover assembly of a printer according to any one of claims 2 to 7, wherein:

the cap assembly further includes a tray member telescopically disposed within the mounting space.

9. The printer comprises a machine body and a cover assembly, wherein the cover assembly is rotationally connected with the machine body;

the method is characterized in that:

the cap assembly employs the cap assembly of any one of the above claims 1 to 8.

10. The printer according to claim 9, wherein:

the cover assembly is provided with a first magnetic attraction piece, the machine body is provided with a second magnetic attraction piece, and the first magnetic attraction piece is attracted with the second magnetic attraction piece.