CN209908321U

CN209908321U - Hidden door device and printing equipment

Info

Publication number: CN209908321U
Application number: CN201920271974.1U
Authority: CN
Inventors: 韩路; 汤英; 王�锋
Original assignee: Shanghai Hanttu Technology Co Ltd; Beijing Xiaomi Mobile Software Co Ltd
Current assignee: Shanghai Hanttu Technology Co Ltd; Beijing Xiaomi Mobile Software Co Ltd
Priority date: 2019-03-04
Filing date: 2019-03-04
Publication date: 2020-01-07
Anticipated expiration: 2029-03-04

Abstract

The present disclosure provides a concealed door apparatus and a printing apparatus. The hidden door device comprises a rack, a door plate, a sliding block and a guide rail, wherein one of the sliding block and the guide rail is fixed on the rack, and the other one is fixed on the door plate. The guide rail is provided with an arc-shaped sliding groove, the rotation center line of the sliding groove is positioned outside the surface of the rack, and the sliding block is matched with the sliding groove. The door plate rotates relative to the rack, the sliding block slides to a preset position relative to the guide rail along the sliding groove, and the door plate is located at an opening position or a closing position relative to the rack. The door plate and the rack are connected in a sliding fit mode through the guide rail and the sliding block, the rotating center line of the sliding groove forms a virtual axis structure, and the rotating angle of the door plate is flexible. The door plate and the rack are not limited by the rotating shaft structure, the door plate can be completely attached to the surface of the rack, and the overall attractiveness is improved. The spout is seted up in guide rail department, and slider and guide rail can be hidden in the frame completely, and the disguise is good.

Description

Hidden door device and printing equipment

Technical Field

The disclosure belongs to the technical field of typewriters and relates to a hidden door device and printing equipment.

Background

In the related art, a printer includes a frame and a printing device disposed in the frame, and the frame is provided with various functional openings, such as an ink cartridge compartment for accommodating an ink cartridge. The printer is further provided with a sealing door which is pivotally connected to the frame by a door shaft for closing the respective opening.

Because the door shaft is matched with the shaft hole arranged on the frame, the sealing door can rotate relative to the frame to seal or open the opening. However, the sealing door must rotate around the door shaft to open or close the opening, and the sealing door and the frame must be provided with corresponding connecting rods or swing arms for providing a sufficient moving range for the sealing door. A groove structure is required to be additionally arranged on the machine frame and used for hiding the matching part of the door shaft and the shaft hole so as to keep the smoothness of the sealing door and the surface of the machine frame.

When the sealing door is opened, the connecting part of the plate body and the rack is necessarily exposed on the appearance surface of the product, and the product appearance finish degree is poor. Moreover, when the sealing door is closed, gaps need to be reserved between the peripheral edges of the plate body and the rack, and the appearance of the printer is poor.

Disclosure of Invention

In view of this, the present disclosure provides a concealed door apparatus and a printing apparatus.

Specifically, the present disclosure is realized by the following technical solutions:

according to a first aspect of the embodiments of the present disclosure, there is provided a hidden door apparatus, including a rack, a door plate, a sliding block and a guide rail, wherein one of the sliding block and the guide rail is fixed to the rack, the other one of the sliding block and the guide rail is fixed to the door plate, the guide rail is provided with an arc-shaped sliding groove, a rotation center line of the sliding groove is located outside a surface of the rack, and the sliding block is matched with the sliding groove;

the door plate rotates relative to the rack, the sliding block slides to a preset position relative to the guide rail along the sliding groove, and the door plate is located at an opening position or a closing position relative to the rack.

In one embodiment, when the door panel is in the closed position, the door panel is attached to the outer surface of the frame.

In one embodiment, the guide rail is provided with a stop position and at least one opening position, the door panel is in the closing position when the sliding block slides to the stop position relatively, and the door panel is opened by a preset angle relative to the machine frame when the sliding block slides to one of the opening positions relatively.

In one embodiment, the guide rail is fixedly arranged on the door panel, and the sliding block is fixedly arranged on the machine frame.

In one embodiment, the guide rail is detachably connected to the door panel; or, the guide rail and the door panel are integrally formed.

In one embodiment, the guide rail is provided with one or more elastic parts which are distributed in the sliding groove at intervals, and the sliding block is elastically abutted with one of the elastic parts to limit the opening position of the door panel; or the door plate is abutted to the rack through the guide rail under the action of gravity and is kept at a corresponding opening position; or the guide rail and the sliding block are mutually clamped and limit the opening position of the door panel.

In one embodiment, one edge of the door panel close to the rotation center line of the chute forms a rotation edge, and the rotation edge is located in the range of the central angle of the chute.

In one embodiment, a bisecting plane where the rotation center line of the sliding chute is located is perpendicular to the surface of the rack, and the rotating edge is located on one side, away from the bisecting plane, of the door panel when the door panel rotates to the open position.

In one embodiment, the rack comprises a mounting groove formed by recessing from the surface and a rotating hole arranged in the mounting groove, and the guide rail is inserted in the rotating hole and is connected with the sliding block in a sliding fit manner;

when the door panel is in the closed position, the door panel is located in the mounting groove.

In one embodiment, the sliding block is provided with a guide surface and a sliding surface opposite to the guide surface, the guide surface is attached to one side arc-shaped surface of the sliding chute, and at least part of the sliding surface is attached to the other side arc-shaped surface of the sliding chute.

In one embodiment, the two guide rails are symmetrically distributed on the door plate, and the sliding block is arranged in the rack and connected with the corresponding guide rails in an inserting manner.

According to a second aspect of the embodiments of the present disclosure, there is provided a printing apparatus including the concealed door apparatus as described above and a printing apparatus mounted to the frame.

The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:

the door plate and the rack are connected in a sliding fit mode through the guide rail and the sliding block, the matching mode of the rotating shaft and the shaft hole is not arranged, the rotating center line of the sliding groove forms a virtual axis structure, and the rotating angle of the door plate is flexible. When the door panel is in the closed position, the door panel and the rack are not limited by the rotating shaft structure, the door panel can be completely attached to the surface of the rack, the matching gap is small, and the overall attractiveness is improved. The spout is seted up in guide rail department, and slider and guide rail can be hidden in the frame completely, and the disguise is good.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

Fig. 1 is a schematic structural view of a concealed door apparatus showing a door panel in an open position according to an exemplary embodiment.

Fig. 2 is a schematic structural view of a concealed door apparatus showing a door panel in a closed position according to an exemplary embodiment.

FIG. 3 is an enlarged, partially cross-sectional, structural schematic view illustrating a guide rail secured to a door panel with the door panel in a closed position in accordance with an exemplary embodiment.

FIG. 4 is an enlarged, partially cross-sectional, structural schematic view illustrating a guide rail secured to a door panel with the door panel in an open position in accordance with an exemplary embodiment.

FIG. 5 is an enlarged, partially cross-sectional, structural schematic view illustrating the guide rail secured to the frame and the door panel in a closed position in accordance with an exemplary embodiment.

FIG. 6 is an enlarged, partially cross-sectional, structural schematic view illustrating the guide rail secured to the frame and the door panel in an open position in accordance with an exemplary embodiment.

Wherein, the frame 10; a rotation hole 11; a mounting groove 12; an assembly port 13; a door panel 20; a rotating edge 21; an extension 22; a guide rail 30; a chute 31; a stopper 32; a slider 40; the guide surface 41; a sliding surface 42; a stop surface 43.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the exemplary embodiments below are not intended to represent all implementations consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. As used in this disclosure and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present disclosure. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

As shown in fig. 1 and 2, in one embodiment a concealed door apparatus is disclosed. The hidden door device comprises a frame 10, a door plate 20, a sliding block 40 and a guide rail 30, wherein one of the sliding block 40 and the guide rail 30 is fixed on the frame 10, and the other one is fixed on the door plate 20. The guide rail 30 is provided with an arc-shaped sliding chute 31, the rotation center line of the sliding chute 31 is positioned outside the surface of the frame 10, and the sliding block 40 is matched with the sliding chute 31. The door panel 20 rotates relative to the frame 10, the sliding block 40 slides along the sliding groove 31 to a preset position relative to the guide rail 30, and the door panel 20 is in an open position or a closed position relative to the frame 10.

The door panel 20 can be opened with respect to the housing 10 to perform opening and closing functions, respectively. If the frame 10 is provided with an ink box chamber and a mounting opening 13 communicated with the ink box chamber, the door plate 20 rotates relative to the frame 10 and opens the mounting opening 13, and a user can mount and dismount the ink box through the mounting opening 13. The door panel 20 rotates relative to the housing 10 and closes the fitting opening 13 to ensure the overall closure of the housing 10.

The guide rail 30 and the sliding block 40 slide relatively, if the sliding block 40 is fixed, the guide rail 30 slides along the track of the sliding chute 31. Alternatively, the guide rail 30 is fixed, and the slider 40 slides along the track of the chute 31. The sliding groove 31 forms an arc segment structure, and the rotation center line of the sliding groove 31 is positioned outside the surface of the frame 10. Accordingly, the door panel 20 can be separated from the frame 10 and rotate along the rotation center line of the chute 31 during the relative sliding of the guide rail 30 and the slider 40. The door panel 20 and the frame 10 are not provided with a matching form of a rotating shaft and a shaft hole, the rotating center line of the chute 31 forms a virtual axis structure, the rotating angle of the door panel 20 is flexible, and correspondingly, the opening angle of the door panel 20 is flexible. When the door panel 20 is in the closed position, the door panel 20 and the rack 10 are not limited by the rotating shaft structure, the door panel 20 can be completely attached to the surface of the rack 10, the fit gap is small, and the overall attractiveness is improved. The sliding groove 31 is arranged at the guide rail 30, and the sliding block 40 and the guide rail 30 can be completely hidden in the machine frame 10, so that the hiding performance is good.

As shown in fig. 3 to 6, one of the guide rail 30 and the sliding block 40 is disposed on the frame 10, and the other is disposed on the door panel 20, which specifically includes the following distribution modes: a. the sliding block 40 is disposed on the frame 10, and the guide rail 30 is disposed on the door panel 20. b. The sliding block 40 is arranged on the door panel 20, and the guide rail 30 is arranged on the frame 10. The arrangement mode of the guide rail 30 and the slide block 40 is flexible, the matching tightness of the door panel 20 and the machine frame 10 is good, and the stability of the moving track is good.

In one embodiment, the door panel 20 is attached to the outer surface of the rack 10 when the door panel 20 is in the closed position. The sliding block 40 slides along the sliding groove 31 to a limit position relative to the guide rail 30, the guide rail 30 and the sliding block 40 are completely hidden in the machine frame 10, and then the door panel 20 is in a closed state, and the door panel 20 is attached to the surface of the machine frame 10.

During the opening of the door panel 20, the edge of the door panel 20 rotates with respect to the surface of the chassis 10 and gradually moves away. Accordingly, when the door panel 20 is closed toward the rack 10, the edge of the door panel 20 rotates relative to the surface of the rack 10 and gradually approaches, even vertically abuts against the surface of the rack 10. When the surface of the frame 10 is provided with the groove structure, the door panel 20 sinks into the groove structure and forms a seamless connection or a small gap with the side wall of the groove structure.

In one embodiment, the guide track 30 has a stop position and at least one open position, and the door panel 20 is in the closed position when the sliding block 40 slides relatively to the stop position. When the sliding block 40 slides relatively to an open position, the door panel 20 is opened to a predetermined angle relative to the rack 10.

The stopping position is arranged at one end of the sliding groove 31 of the guide rail 30, and the sliding block 40 slides along the sliding groove 31 to the stopping position, so that the door panel 20 is tightly attached to the rack 10 and is in the closed position. In an alternative embodiment, the sliding block 40 slides relatively to the stop position, and the door panel 20 is attached to the surface of the rack 10 under the action of gravity. In an alternative embodiment, the sliding block 40 slides relatively to the stop position, and the door plate 20 is connected to the frame 10 in a snap-fit manner.

The open positions are distributed at intervals along the arc direction of the sliding groove 31, and one, two, three and the like are arranged at the open positions. The sliding block 40 slides to the open position relatively and is clamped at the open position, the door panel 20 is at a preset open angle relative to the rack 10, and the open angle of the door panel 20 is convenient to control. The open position can be a rib, a groove, an elastic expansion piece and other positioning structures distributed in the chute 31.

The following description will be given by way of example only, in which the guide rail 30 is fixed to the door panel 20, and the slider 40 is fixed to the frame 10.

As shown in fig. 3 and 4, in one embodiment, the guide rail 30 is removably attached to the door panel 20. Optionally, the guide 30 is attached to the door panel 20 by fasteners. Optionally, the guide 30 is snap-fit connected to the door panel 20. In one embodiment, the guide rails 30 are integrally formed with the door panel 20.

The guide rail 30 is fixed to the door panel 20, and the positioning accuracy is high. The sliding block 40 is fixed at a predetermined position of the frame 10. The guide rail 30 rotates with the door panel 20 during the opening of the door panel 20. And, the chute 31 of the guide rail 30 and the slider 40 are defined with each other so that the guide rail 30 slides relative to the slider 40 along an arc of the chute 31. The door plate 20 integrally rotates around the rotation center line of the chute 31, the opening track is stable, and the requirement on the installation space of the rack 10 is small.

The door panel 20 is opened to a predetermined angle with respect to the frame 10, and the opening angle between the door panel 20 and the frame 10 may be maintained by the engagement structure of the guide rail 30 and the slider 40. Alternatively, the door panel 20 is fastened to the frame 10 by the guide rail 30 under the gravity to maintain the opening angle between the door panel 20 and the frame 10.

In one embodiment, the guide rail 30 is provided with one or more elastic portions, the elastic portions are spaced apart from each other in the sliding slot 31, and the sliding block 40 is elastically abutted against one of the elastic portions to define the opening position of the door panel 20. Alternatively, the elastic portion is protruded at the side wall of the slide groove 31 to form a rib structure. Optionally, the resilient portion is formed recessed from a surface of the groove to form a groove structure. Alternatively, the elastic portion is provided as an elastic expansion member mounted to the guide rail 30, and an end of the elastic expansion member protrudes at a side wall of the chute 31.

The slide block 40 slides to the elastic part and is connected with the elastic part in a buckling mode, and the positioning accuracy is high. The slider 40 slides to and elastically presses the elastic portion and forms an elastic clamping force therebetween, and the door panel 20 is at a corresponding opening angle with respect to the frame 10.

In one embodiment, the door panel 20 abuts against the chassis 10 under the action of gravity via the guide rail 30 and is held in the respective open position. The guide rail 30 is of an arc structure, and the sliding groove 31 is arranged at the guide rail 30 and has the same arc as the guide rail 30. When the door panel 20 is opened with respect to the frame 10, the arc-shaped edge of the guide rail 30 and the frame 10 are mutually clamped, so that the door panel 20 is kept at the corresponding opening position, and the position is kept well. Optionally, when the door panel 20 is in the open state, the sliding groove 31 side of the guide rail 30 is clamped to the sliding block 40, so that the door panel 20 is kept in the open position. Optionally, when the door panel 20 is in the open state, the door panel 20 forms a cantilever structure with respect to the rack 10, and the opening control is convenient.

In one embodiment, the guide track 30 and the slider 40 are captured with each other and define the open position of the door panel 20. The sliding groove 31 is recessed from the surface of the guide rail 30 and forms an arc groove structure, and the sliding block 40 is an arc guide pillar matched with the sliding groove 31. Alternatively, the two arc surfaces of the sliding block 40 and the two arc surfaces of the sliding chute 31 form an approximate concentric arc structure. After the external force for driving the door panel 20 to move disappears, the guide rail 30 and the arc-shaped surface of the chute 31 are mutually clamped under the action of the gravity of the door panel 20, wherein the door panel 20 keeps the opening position under the action of the friction force and the clamping force of the guide rail 30 and the chute 31, and the position opening angle is convenient to adjust.

With continued reference to fig. 3 and 4, in one embodiment, the frame 10 includes a mounting groove 12 formed by recessing from the surface and a rotation hole 11 disposed in the mounting groove 12, and the guide rail 30 is inserted into the rotation hole 11 and connected with the sliding block 40 in a sliding fit manner. When the door panel 20 is in the closed position, the door panel 20 is positioned in the mounting slot 12.

The frame 10 is a thin-walled frame structure, and the door panel 20 is mounted to a mounting portion of one side of the frame 10. The mounting groove 12 is provided on one side surface of the mounting portion, and the slider 40 is provided on the other side of the mounting portion. The rotating hole 11 is arranged on the bottom wall of the mounting groove 12 and is positioned on the extension line of the arc line where the sliding groove 31 is positioned, and the opening size of the rotating hole 11 is larger than the cross-sectional size of the guide rail 30. The door plate 20 is arranged at one side of the frame 10, the guide rail 30 is inserted into the frame 10 from the rotation hole 11 and extends to the other side of the frame 10, the sliding block 40 is inserted into the sliding groove 31 and limits the moving track of the guide rail 30 and the door plate 20, and the door plate 20 is convenient to open and close.

When the door panel 20 is in the closed position, the guide rail 30 slides to the limit position on the other side of the rack 10, and the door panel 20 is attached to the bottom wall of the installation groove 12. At least a portion of the door panel 20 is positioned in the mounting slot 12 such that the height of the door panel 20 protruding from the surface of the rack 10 is reduced or recessed within the rack 10. In an alternative embodiment, the depth of the mounting groove 12 is the same as the thickness of the door panel 20. Accordingly, the outer side surface of the door panel 20 is flush with or smoothly transited to the surface of the frame 10, and the overall aesthetic property is good.

In one embodiment, one edge of the door panel 20 close to the rotation center line of the sliding chute 31 forms a rotating edge 21, and the rotating edge 21 is located within the range of the central angle of the sliding chute 31. The door panel 20 is integrally rotated about the rotation center line of the chute 31 to constitute a virtual rotation shaft structure. Wherein, one side edge of the door panel 20 close to the rotation center line of the chute 31 forms a rotation edge 21. Alternatively, the turning edge 21 is parallel to the turning center line of the chute 31. The turning edge 21 is located at an edge of the door panel 20 closest to a turning center line of the chute 31, which is closest to the turning center line of the door panel 20. The rotating edge 21 is located within the central angle range of the sliding slot 31, so that the door panel 20 can rotate along the sliding slot 31 and open to a preset angle. The bottom wall structure of the installation groove 12 or the surface of the joint part of the door panel 20 is adjusted through the groove structure to eliminate the interference part with the rotating edge 21, the door panel 20 cannot interfere with other contact parts of the rack 10, and the whole appearance is good in attractiveness.

In an alternative embodiment, the center line of the sliding slot 31 is perpendicular to the surface of the frame 10, and the rotating edge 21 is located on the side of the door panel 20 away from the center plane when the door panel is rotated to the open position. The center line of rotation of the chute 31 is a straight line, and the center line of rotation is located on the bisector plane and the bisector plane is perpendicular to the surface of the rack 10. The edge that rotates limit 21 and locate door plant 20 is located the one side of bisection face, and when door plant 20 rotated and opened, the rotation limit 21 can not interfere in the surface of frame 10, and the surface of frame 10 can be set to the level surface, improves the whole pleasing to the eye degree of frame 10. The rotating edge 21 is an edge of the door panel 20 extending from the edge of the guide rail 30 to the split direction to form the extending portion 22, when the door panel 20 is attached to the rack 10, the extending portion 22 and other portions of the door panel 20 are both attached to the surface of the rack 10, and the joint portion of the guide rail 30 and the rack 10 is hidden by the door panel 20, so that the whole concealment performance is good. When the door panel 20 is located in the mounting groove 12, the movable gap between the edge of the door panel 20 and the side wall of the mounting groove 12 is small, so that the door gap is reduced, and the whole attractive appearance is high. For example, the gap between the door panel 20 and the side wall of the mounting groove 12 is set as H, and H is more than or equal to 0 and less than or equal to 0.3 mm. The gap between the door panel 20 and the frame 10 is small, and the overall appearance is high.

With continued reference to fig. 3 and 4, in one embodiment, the slider 40 is provided with a guide surface 41, and a sliding surface 42 disposed opposite the guide surface 41, wherein the guide surface 41 abuts against one side arc-shaped surface of the slide groove 31, and at least a portion of the sliding surface 42 abuts against the other side arc-shaped surface of the slide groove 31.

The slider 40 is fixed to the frame 10, and opposite side surfaces thereof form a guide surface 41 and a slide surface 42, respectively. The sliding surface 42 is in contact with the outer arc surface of the slide groove 31, and the guide surface 41 is in contact with the inner arc surface of the slide groove 31. The guide surface 41 and the sliding surface 42 may be smooth curved surfaces or may be locally convex ribs. The sliding surface 42 of the sliding block 40 is attached to the arc-shaped surface of the sliding groove 31, so that the guide rail 30 can be guided to move along the sliding block 40 and the moving stability of the guide rail 30 can be kept. Alternatively, the guide surface 41 forms a concentric arc with the sliding surface 42, and when the door panel 20 is opened by a predetermined angle, the weight of the door panel 20 is transmitted to the slider 40 through the guide rail 30 and forms a component force perpendicular to the sliding surface 42. The slider 40 can be mutually limited with the arc-shaped side wall of the sliding slot 31, so as to conveniently control the opening angle of the door panel 20.

In an alternative embodiment, the end of the guide rail 30 is provided with a stop 32 closing the slide groove 31, and the two ends of the slide 40 are provided with stop surfaces 43 connecting the guide surface 41 and the slide surface 42. When the door panel 20 is in the limit state of opening, the stop surface 43 of the slider 40 abuts against the stop portion 32. When the door panel 20 is in the closed position, the stopper 32 abuts against the chassis 10 or is spaced apart from the chassis 10 by a predetermined distance.

In a specific embodiment, the guide rails 30 are provided with two and symmetrically distributed door panels 20, and the sliding blocks 40 are arranged in the machine frame 10 and are connected with the corresponding guide rails 30 in a plugging manner. The sliding block 40 is arranged in the machine frame 10 and close to the rotating hole 11, the guide rail 30 is inserted into the rotating hole 11 and is in sliding connection with the sliding block 40, the stress of the door panel 20 is balanced, and the moving stability is good. The guide rails 30 are symmetrically distributed on the door panel 20, and the rotating edge 21 of the door panel 20 extends from the edge of the guide rail 30 to the middle plane direction to form an extending part 22. When the door panel 20 is attached to the rack 10, the extension portion 22 and other portions of the door panel 20 are attached to the surface of the rack 10, and the joint portion of the guide rail 30, the rotation hole 11 and the rack 10 is hidden by the door panel 20, so that the whole concealment performance is good.

The concealed door device disclosed in the above embodiment is applied to a printing apparatus for improving the overall appearance aesthetic property of the printing apparatus and reducing the structural complexity of the printing apparatus. In one embodiment, the printing apparatus includes a concealed door apparatus as disclosed in the above embodiments and a printing apparatus mounted to the frame 10.

Printing devices such as a print head, an ink supply system, a paper supply system, and the like are provided in the frame 10. The frame 10 is provided with an assembly opening 13 for attaching and detaching components of the printing apparatus. The door panel 20 covers the assembly opening 13 and is attached to the surface of the frame 10, so that the overall appearance is good. The sliding connection structure of the guide rail 30 and the sliding block 40 is adopted between the rack 10 and the door panel 20, and the door panel 20 can rotate for a preset angle relative to the rack 10 to be opened, so that the opening is convenient. The door plate 20 completely seals the guide rail 30 and the assembling opening 13 of the frame 10, and has good concealment.

The present disclosure is to be considered as limited only by the preferred embodiments and not limited to the specific embodiments described herein, and all changes, equivalents, and modifications that come within the spirit and scope of the disclosure are desired to be protected.

Claims

1. A hidden door device is characterized by comprising a rack, a door plate, a sliding block and a guide rail, wherein one of the sliding block and the guide rail is fixed on the rack, the other one of the sliding block and the guide rail is fixed on the door plate, the guide rail is provided with an arc-shaped sliding groove, the rotation center line of the sliding groove is positioned outside the surface of the rack, and the sliding block is matched with the sliding groove;

2. The door unit of claim 1, wherein the door panel is attached to an outer surface of the frame when the door panel is in the closed position.

3. The door unit of claim 1, wherein the track has a stop position and at least one open position, and wherein relative sliding movement of the slider to the stop position causes the door panel to be in the closed position, and relative sliding movement of the slider to one of the open positions causes the door panel to be opened at a predetermined angle relative to the frame.

4. The door unit of claim 1, wherein the rail is fixedly attached to the door panel and the slider is fixedly attached to the frame.

5. The concealed door arrangement according to claim 4, wherein the guide rail is removably attached to the door panel; or, the guide rail and the door panel are integrally formed.

6. The concealed door arrangement according to claim 4, wherein the guide rail is provided with one or more resilient portions spaced apart from the chute, the slider resiliently abutting one of the resilient portions to define the open position of the door panel; or the door plate is abutted to the rack through the guide rail under the action of gravity and is kept at a corresponding opening position; or the guide rail and the sliding block are mutually clamped and limit the opening position of the door panel.

7. The concealed door apparatus according to claim 4, wherein one edge of the door panel near a center line of rotation of the chute constitutes a turning edge, the turning edge being located within a range of a central angle of the chute.

8. The concealed door apparatus according to claim 7, wherein a bisector plane in which a center line of rotation of the chute is located is perpendicular to a surface of the frame, and the rotating edge is located on a side of the door panel away from the bisector plane when the door panel is rotated to the open position.

9. The concealed door apparatus according to claim 4, wherein the frame includes a mounting groove recessed from a surface thereof and a rotation hole provided in the mounting groove, the guide rail being inserted through the rotation hole and slidably engaged with the slider;

10. The concealed door arrangement according to claim 4, wherein the slider is provided with a guide surface, a sliding surface disposed opposite the guide surface, the guide surface engaging one side arcuate surface of the chute, at least a portion of the sliding surface engaging the other side arcuate surface of the chute.

11. The concealed door device according to claim 4, wherein the guide rails are provided with two and symmetrically distributed on the door panel, and the sliding blocks are arranged in the frame and connected with the corresponding guide rails in an inserting manner.

12. A printing apparatus comprising the shutter device of any one of claims 1 to 11 and a printing device mounted to the frame.