CN216001915U - Printer paper blocking structure - Google Patents

Abstract

The utility model relates to a printer keeps off paper structure, include: a cover plate having a receiving recess; a paper stopper provided on the cover plate to rotate up and down by a rotating shaft and having a paper passing state displaced into the accommodating recess to allow forward passage of the paper and a paper stopping state exposed out of the accommodating recess to block forward movement of the paper; the paper feeding assembly comprises a fixed frame and a paper taking device arranged on the fixed frame, and the fixed frame can be arranged on the cover plate in a vertically swinging mode; the fixing frame is provided with a track groove, and in the swinging process of the fixing frame, the end part of the rotating shaft can slide along the track groove to change the deflection angle, so that the paper blocking piece is locked in the paper blocking state when the fixing frame swings to a set position. This printer keeps off paper structural design is reasonable, and can realize keeping off the switching of paper and logical paper function in a flexible way.

Description

Printer paper blocking structure

Technical Field

The utility model relates to a printer technical field especially relates to a printer keeps off paper structure.

Background

Printers in the market currently have an automatic paper feeding mechanism for sequentially feeding paper in a paper feeding tray into a machine body. A paper blocking mechanism is usually designed on the paper feeding mechanism, and when the fed paper is transported between two predetermined positions, the paper blocking mechanism can limit the position of the paper placed on the paper feeding tray along the paper feeding path, so that the paper can generate a blocking feeling and stop at a proper position, thereby reducing the occurrence of poor paper separation such as skew and paper jam during the transportation of the paper, and improving the stability of the automatic paper feeding mechanism in transporting the paper. An automatic document feeder of a printer switches between a paper blocking function and a paper feeding function as required during printing.

For example, chinese patent application No. 201410391100.1 (No. CN104199262B) discloses "a paper blocking mechanism, a paper feeding section, an image forming apparatus, and a paper feeding method", wherein the paper blocking mechanism includes a stopper and a paper blocking member which are provided in a paper feeding path and can swing, and a separating member which keeps the stopper and the paper blocking member in a separated state; when the paper blocking mechanism is in a paper blocking state, the paper blocking piece swings under the action of external force and is abutted against the stop piece, and the paper blocking piece stops swinging and blocks paper, so that the paper cannot advance. When the paper blocking mechanism is in a non-paper blocking state, the paper blocking piece swings under the action of external force and is separated from the stop piece. The first end of the stopper is a hook, and the first end of the paper stopper is a hook-shaped part; when the hook is in opposite lap joint with the hook-shaped part, the surface of the hook opposite to the hook-shaped part is in line contact or surface contact with the surface of the hook opposite to the hook-shaped part. The separating component is a torsion spring arranged on the paper blocking piece swinging shaft at two sides of the paper blocking piece, and one end of the torsion spring is abutted against the paper blocking piece.

Although the paper blocking mechanism can realize the switching between the paper blocking function and the paper passing function, the assembly structure is complex and not concise, and further improvement is needed.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art's current situation, provide a structural design is reasonable, and can realize in a flexible way that keep off the printer of the switching of paper and logical paper function and keep off the paper structure.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: a printer paper blocking structure comprising:

a cover plate having a receiving recess;

a paper stopper provided on the cover plate to rotate up and down by a rotating shaft and having a paper passing state displaced into the accommodating recess to allow forward passage of the paper and a paper stopping state exposed out of the accommodating recess to block forward movement of the paper;

the paper feeding assembly comprises a fixed frame and a paper taking device arranged on the fixed frame, and the fixed frame can be arranged on the cover plate in a vertically swinging mode;

the fixing frame is provided with a track groove, and in the swinging process of the fixing frame, the end part of the rotating shaft can slide along the track groove to change the deflection angle, so that the paper blocking piece is locked in the paper blocking state when the fixing frame swings to a set position.

In order to realize automatic locking of the paper stopper during swinging of a fixing frame of a paper feeding assembly having a first operating state of swinging toward a paper placing area of the printer to perform paper taking and a second operating state of stopping paper taking away from the paper placing area of the printer, the tracking groove has an active region allowing the rotation shaft to rotate freely and a locking region for restricting the rotation shaft to a set deflection angle position, when the paper feeding component is in a first action state, the end part of the rotating shaft is displaced to the movable area of the track groove so as to allow the paper blocking piece to rotate and be displaced to the accommodating concave part, when the paper feeding assembly is in the second action state, the end part of the rotating shaft is displaced to the locking area of the track groove, so that the paper blocking piece is exposed out of the accommodating concave part and is kept in the paper blocking state.

In order to effectively limit the deflection angle of the rotating shaft in the sliding fit process of the rotating shaft and the track groove of the fixing frame, the end part of the rotating shaft is provided with a stop plane, and the stop plane of the rotating shaft is abutted against the inner side wall of the track groove in the state that the rotating shaft slides to the position of the locking area along the track groove, so that the rotating shaft is limited at the corresponding deflection angle.

In order to achieve a secure locking of the rotary shaft, the end of the rotary shaft has two stop planes arranged in parallel.

In order to drive the paper blocking piece to be displaced into the accommodating concave part of the cover plate so as to avoid influencing the paper advancing process, under the condition that the end part of the rotating shaft is positioned in the active area of the track groove, the paper blocking piece rotates under the action of the self gravity or the action of the paper advancing driving force to be displaced into the accommodating concave part and is kept in the paper passing state.

In order to enable the paper blocking piece to be rapidly displaced into the accommodating concave portion of the cover plate, the paper blocking piece comprises a paper blocking plate and a weight piece, the paper blocking plate and the weight piece are connected to the rotating shaft, the paper blocking plate and the weight piece are respectively connected to two sides of the rotating shaft, and the paper blocking plate rotates under the action of gravity of the weight piece and is displaced into the accommodating concave portion of the cover plate.

In order to realize effective blocking of paper, the whole paper blocking plate is L-shaped. The L-shaped paper blocking plate can abut against the end face of the paper, so that the paper is aligned, and the problems of deflection and the like of the paper during conveying are reduced.

In order to simplify the structure of the cover plate and reduce the problem of blocking of paper in the advancing process, a plurality of vertical plates which are vertically arranged and extend along the front-back direction are distributed on the inner side wall of the cover plate, wherein a gap between every two adjacent vertical plates forms the accommodating concave part.

As an improvement, the two paper blocking pieces are arranged corresponding to the left side and the right side of the fixing frame respectively, track grooves are formed in the left side wall and the right side wall of the fixing frame respectively, and the two track grooves correspond to the two paper blocking pieces. The two paper blocking parts are arranged, so that the strict alignment state of the paper in the paper blocking state can be ensured, and the skew problem is reduced.

In order to realize the rotary connection of the fixing frame and the cover plate, the inner side wall of the cover plate is provided with support plates which are arranged in parallel in the left-right direction, the left side and the right side of the fixing frame adjacent to the rear side edge are respectively provided with connecting shafts which are outwards extended along the left-right direction and are on the same straight line, and the two connecting shafts are respectively and rotatably connected to the two support plates.

Compared with the prior art, the utility model has the advantages that: the track groove on the fixing frame of the paper feeding assembly is in sliding fit with the rotating shaft of the paper blocking piece, so that the paper blocking piece can be locked in the paper blocking state, and the paper blocking piece cannot easily deflect in the paper blocking state, so that the paper can be effectively limited in a set position, the paper can be effectively aligned, and the problems of deflection and the like of the paper in conveying are reduced. This keep off paper structure only carries out rational design through addding orbit groove structure and the tip structure to the axis of rotation, can realize keeping off the dead purpose of paper lock when keeping off the paper state, and it is for additionally setting up wobbling retainer or the interactive mechanism of a plurality of connecting rods among the prior art, and the structure is simpler, and manufacturing cost is lower, and can realize in a flexible way keeping off paper and lead to the switching of paper function

Drawings

Fig. 1 is a schematic perspective view of embodiment 1 of the present invention;

fig. 2 is a right side view of embodiment 1 of the present invention;

fig. 3 is a schematic view of a three-dimensional structure of the embodiment 1 of the present invention after the bottom is turned over (the paper blocking member is in a paper blocking state);

fig. 4 is a schematic view of a three-dimensional structure of the embodiment 1 of the present invention after the bottom is turned over (the paper blocking member is in a paper passing state);

fig. 5 is a right side view of embodiment 1 of the present invention with the cover plate omitted (the rotation axis is located in the locking region of the track groove);

fig. 6 is a right side view of embodiment 1 of the present invention with the cover plate omitted (the rotation axis is located in the active area of the track groove);

fig. 7 is a schematic perspective view of the cover plate of embodiment 1 of the present invention (the paper blocking member is in a paper feeding state);

FIG. 8 is a schematic perspective view of the alternate angle of FIG. 7;

fig. 9 is a schematic perspective view of a paper stopper according to embodiment 1 of the present invention;

fig. 10 is a right side view of embodiment 2 of the present invention with the cover plate omitted (the rotation axis is located in the locking region of the track groove);

fig. 11 is a right side view of embodiment 2 of the present invention without the cover plate (the rotation axis is located in the active area of the track groove).

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

In the description of the present invention, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in a generic and descriptive sense only and not for purposes of limitation, as the disclosed embodiments of the invention may be oriented in different directions and the directional terms are intended to be illustrative and should not be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions opposite to or coincident with the direction of gravity. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

Example 1

Referring to fig. 1 to 9, a paper blocking structure of a printer includes a cover plate 10, a paper blocking member 20, and a paper feeding assembly. The paper stopper 20 and the paper feeding assembly are disposed on the inner sidewall of the cover plate 10.

Fig. 1 is a schematic perspective view of a paper blocking structure of a printer according to the present embodiment, in which a cover plate 10 has vertical plates 11 extending in a front-back direction and spaced apart from each other in a left-right direction on an inner wall thereof, and a gap between two adjacent vertical plates 11 forms a receiving recess 12 for receiving a paper blocking member 20. Specifically, two vertical plates 11 are provided with opposite rotating shaft holes, and the paper blocking member 20 is vertically rotatably provided on the two vertical plates 11 through a rotating shaft 23, and has a paper passing state (see in detail fig. 4) which is upwardly displaced into the accommodating recess 12 to allow the paper to pass forward, and a paper blocking state (see in detail fig. 2 and 3) which is downwardly exposed out of the accommodating recess 12 to block the paper from moving forward. The center of rotation of the stopper member 20 is shown as a center line a2 in fig. 3.

Fig. 2 is a right side view of the paper blocking structure of the printer according to the embodiment, in which the paper blocking member 20 is exposed out of the accommodating recess 12 and is in a paper blocking state, and the paper feeding assembly is in a non-paper feeding state of swinging upward and being away from the paper placing area (i.e., the paper bin). The direction indicated by the arrow in the figure is the direction in which the sheet advances.

Fig. 3 and 4 are schematic perspective views of the printer paper blocking structure of the present embodiment with the bottom turned over, where fig. 3 shows that the paper blocking member 20 is in a paper blocking state, and fig. 4 shows that the paper blocking member 20 is in a paper passing state. The paper feeding assembly 30 includes a fixing frame 31 and a paper extractor disposed on the fixing frame 31, and the fixing frame is disposed on the cover plate 10 in a manner of being capable of swinging up and down. As can be seen from fig. 3, the inner side wall of the cover plate 10 further has two support plates 13 arranged side by side in the left-right direction, the two support plates 13 are provided with through holes, correspondingly, the left and right sides of the fixing frame 31 adjacent to the rear side edge are respectively extended outwards along the left-right direction thereof with connecting shafts 32 in the same straight line, the two connecting shafts 32 are respectively rotatably connected in the through holes of the two support plates 13, and the rotation center of the fixing frame 31 is referred to as a center line a1 in fig. 3. Referring to fig. 7 and 8, the paper picker of the present embodiment includes a pickup roller 33 and a gear assembly 35 for driving the pickup roller 33 to rotate in forward and reverse directions, and the gear assembly may be in transmission connection with a driving motor (not shown) through a transmission shaft 34. The structure and the working process of the paper picker are the prior art, and are not described herein.

With continued reference to fig. 3 and 4, the paper stopper 20 has two pieces, which are respectively disposed corresponding to the left and right sides of the fixing frame 31. The fixing frame 31 has track grooves 310 on both left and right sidewalls, and the two track grooves 310 correspond to the two paper stoppers 20. In the present embodiment, the provision of two paper stoppers 20 ensures a strict alignment of the sheets maintained in the paper-stopped state, reducing the occurrence of skew problems.

Fig. 5 and 6 are right side views of the printer paper blocking structure of the present embodiment without the cover plate 10, wherein fig. 5 shows the locking region 3102 where the rotation shaft 23 is located in the track groove 310, and fig. 6 shows the movable region 3101 where the rotation shaft 23 is located in the track groove 310. The left and right side walls of the fixing frame 31 have track grooves 310, and the track grooves 310 of this embodiment are formed by surrounding walls protruding from the side wall surfaces of the fixing frame 31. The track groove 310 is a strip-shaped groove arranged substantially vertically, the groove width of the upper portion of the track groove 310 is larger than that of the lower portion, specifically, the upper portion of the track groove 310 has an active region 3101 allowing the rotation shaft 23 to rotate freely, and the lower portion of the track groove 310 has a locking region 3102 for limiting the rotation shaft 23 at a set deflection angle position.

Fig. 9 is a schematic perspective view of the paper stopper 20 of this embodiment, in order to effectively limit the deflection angle of the rotating shaft 23 during the sliding fit between the rotating shaft 23 and the track groove 310 of the fixing frame 31, the side wall of the end of the rotating shaft 23 of this embodiment has two parallel stop planes 230, so that the end of the rotating shaft 23 is flat as a whole. Accordingly, the locking region 3102 of the track groove 310 has a groove width dimension substantially corresponding to the dimension of the end portion of the rotation shaft 23 (i.e., the distance between the two stop planes 230), so that the stop planes 230 of the rotation shaft 23 abut against the inner side wall of the track groove 310 in the state where the rotation shaft 23 slides along the track groove 310 to the locking region 3102, thereby defining the rotation shaft 23 at a corresponding deflection angle. That is, during the swing of the fixed frame 31, the end of the rotating shaft 23 can slide along the tracking groove 310 to change the deflection angle, thereby locking the paper stopper 20 in the paper stopper state when the fixed frame 31 is swung to the set position (the lock region 3102 position).

With continued reference to fig. 9, in order to achieve effective blocking of the paper, the paper blocking member 20 of the present embodiment is a paper blocking plate 21, and specifically, the paper blocking plate 21 is L-shaped as a whole. The L-shaped paper baffle plate 21 can be abutted against the end face of the paper, so that the paper is aligned, and the problems of deflection and the like of the paper during conveying are reduced.

Referring to fig. 5 and 6, the paper feeding assembly 30 has a first operating state (see fig. 6) swinging toward the paper placing area of the printer to pick up paper and a second operating state (see fig. 5) moving away from the paper placing area of the printer to stop picking up paper. In the first action state of the paper feeding assembly 30, the end of the rotating shaft 23 is displaced to the movable region 3101 of the track groove 310 to allow the paper stopper 20 to rotate and be displaced into the accommodating recess 12, and in the second action state of the paper feeding assembly 30, the end of the rotating shaft 23 is displaced to the locking region 3102 of the track groove 310 to expose the paper stopper 20 to the accommodating recess 12 and maintain the paper stopper in the paper blocking state.

When the end of the rotating shaft 23 is displaced to the moving region 3101 of the track groove 310, the paper blocking member 20 is allowed to rotate and displace into the accommodating concave portion 12 without being limited by the track groove 310, in this embodiment, the paper blocking member 20 is rotated and displaced into the accommodating concave portion 12 by the paper forward driving force and is kept in the paper passing state, that is, in the first operation state of the paper feeding assembly 30, during the paper feeding process, the paper advancing can abut against the paper blocking member 20, so that the paper blocking member 20 deflects and displaces into the accommodating concave portion 12 to allow the paper to pass.

Example 2

Referring to fig. 10 and 11, the present embodiment is different from embodiment 1 in that: the structure of the paper stopper 20 is different. Specifically, the paper blocking member 20 of the present embodiment further includes a weight member 22 in addition to the paper blocking plate 21, wherein the paper blocking plate 21 and the weight member 22 are respectively connected to both sides of the rotating shaft 23, and when the rotating shaft 23 is displaced to the active region 3101 of the track slot 310, the paper blocking plate 21 can be upwardly deflected by the weight of the weight member 22 to be displaced into the receiving recess 12 of the cover plate 10. The weight 22 is provided to quickly displace the paper stopper 20 into the receiving recess 12 of the cover 10, thereby allowing the paper stopper 20 to be switched between the paper feeding state and the paper stopping state. The paper stopper 20 shown by a dotted line in fig. 11 is in a state where the paper stopper plate 21 is accommodated in the accommodating recess 12 of the cover plate 10.

Claims (10)

1. A printer paper blocking structure comprising:

a cover plate (10) having a housing recess (12);

a paper stopper (20) provided on the cover plate (10) to be rotated up and down by a rotating shaft (23) and having a paper passing state displaced into the accommodating recess (12) to allow forward passage of the paper and a paper stopping state exposed out of the accommodating recess (12) to block forward movement of the paper;

the paper feeding assembly (30) comprises a fixed frame (31) and a paper taking device arranged on the fixed frame (31), and the fixed frame can be arranged on the cover plate (10) in a vertically swinging mode;

the method is characterized in that: the fixed frame (31) is provided with a track groove (310), and the end part of the rotating shaft (23) can slide along the track groove (310) to change the deflection angle during the swinging process of the fixed frame (31), so that the paper blocking piece (20) is locked in the paper blocking state when the fixed frame (31) swings to the setting position.

2. The printer paper stopping structure according to claim 1, wherein: the paper feeding assembly (30) has a first action state of swinging towards a paper placing area of the printer to take out paper and a second action state of moving away from the paper placing area of the printer to stop taking out paper, the track groove (310) has a movable area (3101) allowing the rotating shaft (23) to freely rotate and a locking area (3102) limiting the rotating shaft (23) at a set deflection angle position, in the first action state of the paper feeding assembly (30), the end of the rotating shaft (23) is displaced to the movable area (3101) of the track groove (310) to allow the paper blocking piece (20) to rotate and be displaced into the accommodating concave part (12), in the second action state of the paper feeding assembly (30), the end of the rotating shaft (23) is displaced to the locking area (3102) of the track groove (310), so that the paper stopper (20) is exposed from the housing recess (12) and held in a paper stopping state.

3. The printer paper stop structure according to claim 2, wherein: the end of the rotating shaft (23) has a stop plane (230), and when the rotating shaft (23) slides along the track groove (310) to a position of a locking region (3102), the stop plane (230) of the rotating shaft (23) abuts against the inner side wall of the track groove (310), and the rotating shaft (23) is limited to a corresponding deflection angle.

4. The printer paper stop structure according to claim 3, wherein: the end of the pivot shaft (23) has two stop surfaces (230) arranged parallel to each other.

5. The printer paper stop structure according to claim 2, wherein: in a state where the end of the rotating shaft (23) is located in the active region (3101) of the track groove (310), the paper stopper (20) is rotated by its own weight or by a paper forward driving force to be displaced into the accommodating recess (12) and held in a paper passing state.

6. The printer paper stop structure according to claim 5, wherein: the paper blocking piece (20) comprises a paper blocking plate (21) and a weight piece (22) which are connected to the rotating shaft (23), the paper blocking plate (21) and the weight piece (22) are respectively connected to two sides of the rotating shaft (23), and the paper blocking plate (21) rotates under the action of gravity of the weight piece (22) and is displaced into the accommodating concave portion (12) of the cover plate (10).

7. The printer paper stop structure according to claim 6, wherein: the whole paper blocking plate (21) is L-shaped.

8. The printer paper stop structure according to any one of claims 1 to 7, wherein: a plurality of vertical plates (11) which are vertically arranged and extend along the front-back direction are distributed on the inner side wall of the cover plate (10), wherein a gap between every two adjacent vertical plates (11) forms the accommodating concave part (12).

9. The printer paper stop structure according to any one of claims 1 to 7, wherein: the two paper blocking pieces (20) are arranged corresponding to the left side and the right side of the fixing frame (31), track grooves (310) are formed in the left side wall and the right side wall of the fixing frame (31), and the two track grooves (310) correspond to the two paper blocking pieces (20).

10. The printer paper stop structure according to any one of claims 1 to 7, wherein: the inner side wall of the cover plate (10) is provided with support plates (13) which are arranged in parallel in the left-right direction, the left side and the right side of the fixing frame (31) which are adjacent to the rear side edge are respectively provided with connecting shafts (32) which are arranged on the same straight line in an outward extending mode in the left-right direction, and the two connecting shafts (32) are respectively connected to the two support plates (13) in a rotating mode.

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