CN210502034U

CN210502034U - Automatic pen feeding mechanism

Info

Publication number: CN210502034U
Application number: CN201921397996.9U
Authority: CN
Inventors: 郑崇廷; 张俊峰
Original assignee: Ningbo Tiantian Stationery Co ltd
Current assignee: Ningbo Tiantian Stationery Co ltd
Priority date: 2019-08-27
Filing date: 2019-08-27
Publication date: 2020-05-12
Anticipated expiration: 2029-08-27

Abstract

The utility model discloses an automatic advance a mechanism, including advancing a lid, base, advancing a subassembly and turbine, the base includes bottom surface, first side and second side, the turbine is connected with advancing a subassembly, the turbine is connected on the base bottom surface, advance a lid on the base, the bottom surface of base is connected with spring mechanism, the spring mechanism other end with advance a subassembly and be connected. The utility model discloses a set up spring mechanism, make into a mechanism and can hold the pencil of different model sizes, solved current sharpener and advance the problem that can't freely hold different model sizes pencil in the technique.

Description

Automatic pen feeding mechanism

Technical Field

The utility model relates to the technical field of stationery, more precisely relate to an automatic pen feeding mechanism.

Background

At present, the prior art discloses an automatic pencil feeding mechanism for sharpening, which is disclosed as 208359795U, and comprises a first pencil feeding assembly, a second pencil feeding assembly and a turbine; the first pen feeding assembly and/or the second pen feeding assembly comprise impellers; the turbine is meshed with the impeller, the turbine is a driving part, and the impeller is a driven part; the turbine rotates to drive the impeller to rotate. The automatic pencil feeding mechanism for the pencil sharpener has the advantages of compact structure, reliable work, stable transmission, high efficiency, long service life and low noise, and can ensure constant transmission ratio. However, the mechanism still has certain defects, and for pencils with different sizes, the mechanism cannot be freely adjusted to adapt to the pencils with different sizes, and aiming at the problem, the current pencil sharpener on the market is often provided with a plurality of gears to adapt to the pencils with different sizes, however, the mode is still stiff, cannot be freely adapted to the pencils with different sizes, and only can be used for processing the pencils with limited sizes.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide an automatic pen feeding mechanism that can also freely adapt to not unidimensional pencil when realizing compact structure, reliable operation, transmission steady, efficient, longe-lived, small in noise, can guarantee these advantages of invariable drive ratio.

The utility model adopts the technical scheme that an automatic pen feeding mechanism, include the support and advance a subassembly, support and advance a subassembly elastic connection.

The utility model has the advantages that: advance a subassembly have an effort of foling to the centre under elastic connection's effect, when not having the pencil to get into a subassembly, advance a subassembly and be the state of foling under elastic connection's effect, when the pencil gets into a subassembly, because elastic connection's existence, the size that the pencil space grow of advancing of a subassembly is enough to hold the pencil to it still exists a power of foling and fixes the pencil to the pencil that stretches into to advance a subassembly, this makes the utility model discloses can adapt to the pencil of different models, and still can keep good the performance of cutting a pencil.

Preferably, the support comprises a base, the base comprises a bottom surface, the pen feeding assembly is elastically connected with the bottom surface through a spring mechanism, a turbine is connected to the base, the pen feeding assembly comprises a first pen feeding assembly and a second pen feeding assembly, and the first pen feeding assembly comprises a clutch, a first impeller meshed with the turbine and a first impeller shaft connected with the first impeller through the clutch; the second pen feeding assembly comprises a second impeller meshed on the turbine and a second impeller shaft fixedly connected with the second impeller; the first impeller shaft is rotatably connected with a first pen feeding rubber roller, and the second impeller shaft is also rotatably connected with a second pen feeding rubber roller. After adopting this kind of structure, because produce very big revolving force at the in-process of cutting the pencil, this power can drive the pencil rotatory, the clutch can separate this moment, take place to skid between first impeller shaft and the first impeller, first impeller shaft takes place to skid with first pen inlet rubber roll, first pen inlet rubber roll rotational speed becomes original seventh, the power that mainly relies on the impeller of second pen inlet subassembly to drive the second pen inlet subassembly rotatory, the extrusion drives the pencil and advances a pen, like this, the in-process pencil of cutting the pencil can not be rotated.

Preferably, the spring mechanism comprises a first spring support sleeve and a first spring, the first spring support sleeve is sleeved on the first impeller shaft, one end of the first spring is connected to the first spring support sleeve, and the other end of the first spring is connected to the bottom surface, so that the first impeller shaft can be acted by the spring and has the capacity of changing the pen inlet gap along with the size of the pencil.

Preferably, the spring mechanism further comprises a second spring support sleeve and a second spring, the second spring support sleeve is sleeved on the second impeller shaft, one end of the second spring is connected to the second spring support sleeve, the other end of the second spring is connected to the bottom surface of the second spring support sleeve, the second impeller shaft can be under the action of the spring, and the capacity of changing the pen inlet gap along with the size of the pencil is achieved.

Preferably, the first spring support sleeve is sleeved at one end, far away from the first impeller, of the first impeller shaft, so that the first spring does not interfere with the first impeller, and the pushing effect of the first spring on the first impeller shaft is better.

Preferably, the second spring support sleeve is sleeved on one end of the second impeller shaft far away from the second impeller. The second spring does not interfere with the second impeller, and the pushing effect of the second spring on the second impeller shaft is better.

Preferably, the base further comprises a first side surface and a second side surface, two ends of the first impeller shaft are rotatably connected to the first side surface and the second side surface, a rotating connection position of one end, sleeved with the first spring support sleeve, of the first impeller shaft and the first side surface or the second side surface is a first connection port, a rotating connection position of the other end of the first impeller shaft and the first side surface or the second side surface is a second connection port, the first connection port is of an inclined full-oval structure, the second connection port is of a vertical semi-oval structure, and on the basis that one end of the first impeller shaft is acted by a spring, the corresponding full-oval connection port is arranged to provide a moving space for the first spring to change the position of the first impeller shaft.

Preferably, the base further comprises a first side surface and a second side surface, two ends of the second impeller shaft are rotatably connected to the first side surface and the second side surface, a third connecting port is arranged at a position where one end of the second impeller shaft, which is provided with a second spring support sleeve, is rotatably connected with the first side surface or the second side surface, a fourth connecting port is arranged at a position where the other end of the second impeller shaft is rotatably connected with the first side surface or the second side surface, the third connecting port is of an inclined full-oval structure, the fourth connecting port is of a vertical semi-oval structure, and a corresponding full-oval interface is arranged on the basis that one end of the second impeller shaft is acted by a spring to provide a movement space for the second spring to change the position of the second impeller shaft.

Preferably, the first pen feeding rubber roller comprises a first rubber roller body and a first shaft inlet, and the diameter of the first shaft inlet is larger than that of the first impeller shaft.

Preferably, the second pen feeding rubber roller comprises a second rubber roller body and a second shaft inlet, and the diameter of the second shaft inlet is larger than that of the second impeller shaft.

If the diameter of the shaft inlet is close to that of the impeller shaft, the problems of broken core and burr can be caused by overlarge pen rolling force during pen feeding, and the problem does not exist when the diameter of the shaft inlet is larger than that of the impeller shaft.

Drawings

FIG. 1 is an exploded view of the present invention;

fig. 2 is a schematic structural diagram of the first pen feeding assembly, the second pen feeding assembly and the turbine of the present invention;

FIG. 3 is a schematic view of an assembly structure of the pen feeding assembly, the worm gear and the base according to the present invention;

fig. 4 is an assembly view of the present invention;

shown in the figure: 1. a base; 2. a bottom surface; 3. a first side surface; 4. a second side surface; 5. a pen feeding assembly; 6. a turbine; 7. a spring mechanism; 8. a first pen feeding assembly; 9 a second pen feeding assembly; 10 a first impeller; 11 a first impeller shaft; 12, first pen feeding rubber roller; 13. a clutch; 14. a second impeller; 15. a second impeller shaft; 16. a second pen feeding rubber roller; 17. A first spring support sleeve; 18. a first spring; 19. a second spring support sleeve; 20. a second spring; 21. a first glue roller; 22. a first shaft inlet; 23. a second glue roller; 24. a second shaft inlet; 25. a pen inlet cover; 26. a first connection port; 27. a second connection port; 28. a third connection port; 29. and a fourth connection port.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1-4, the utility model discloses an automatic advance a mechanism, include support 30, advance a subassembly 5 and turbine 6, the support including advance a lid 25 and base 1 includes bottom surface 2, first side 3 and second side 4, turbine 6 with advance a subassembly 5 and be connected, turbine 6 is connected on bottom surface 2, advance a lid 25 lid on base 1, bottom surface 2 is connected with spring mechanism 7, the spring mechanism 7 other end with advance a subassembly 5 and be connected.

The pen feeding assembly 5 comprises a first pen feeding assembly 8 and a second pen feeding assembly 9, the first pen feeding assembly 8 comprises a first impeller 10, a first impeller shaft 11, a first pen feeding rubber roller 12 and a clutch 13, the first impeller 10 is connected with the first impeller shaft 11 through a clutch 13, the first pen feeding rubber roll 12 is rotationally connected with the first impeller shaft 11, the first impeller 10 is engaged with the turbine 6, the first impeller shaft 11 is rotatably connected with the first side surface 3 and the second side surface 4 of the base 1, the second pen feeding assembly 9 comprises a second impeller 14, a second impeller shaft 15 and a second pen feeding rubber roller 16, the second impeller 14 is fixedly connected with a second impeller shaft 15, the second pen feeding rubber roll 16 is rotatably connected with the second impeller shaft 15, the second impeller 14 is engaged with the turbine 6, and the second impeller shaft 15 is rotatably connected to the first side 3 and the second side 4 of the base 1. After the structure is adopted, in the process of sharpening the pencil, because a large rotating force is generated, the pencil can be driven to rotate by the force, at the moment, the clutch 13 can be separated, the first impeller shaft 11 and the first impeller 10 slip, the first impeller shaft 11 and the first pencil feeding rubber roll 12 slip, the rolling speed of the first pencil feeding rubber roll 12 is changed into the original 1/7, the second pencil feeding assembly 9 is driven to rotate mainly by the force of the second impeller 14 of the second pencil feeding assembly 9, and the pencil is driven to feed by extrusion, so that the pencil cannot be rotated in the process of sharpening the pencil.

The first pen feeding rubber roller 12 comprises a first rubber roller body 21 and a first shaft inlet 22, the second pen feeding rubber roller 16 comprises a second rubber roller body 23 and a second shaft inlet 24, the diameter of the first shaft inlet 22 is larger than that of the first impeller shaft 11 by more than 2 mm, the diameter of the second shaft inlet 24 is larger than that of the second impeller shaft 15 by more than 2 mm, if the diameter of the shaft inlet is close to that of the impeller shaft, the problem of broken cores and burrs can be caused by overlarge pen rolling force during pen feeding, and if the diameter of the shaft inlet is larger than that of the impeller shaft, the problem does not exist.

The clutch 3 comprises a holding claw arranged on the end surface of the first impeller 10, the cross section of the first impeller shaft 11 corresponding to the holding claw is polygonal, and the holding claw is held outside the polygonal part of the cross section of the first impeller shaft 11. One side of the holding claw, which is close to the first impeller shaft 11, is provided with a protrusion, and one side of the protrusion is in contact with the outer side wall of the first impeller shaft 11. The holding claws are multiple and are evenly distributed along the circumferential direction of the end surface of the first impeller 10. The number of the holding claws corresponds to the number of the sides of the cross section, and each holding claw is held on the side edge of the corresponding first impeller shaft 11. In this embodiment, the number of the holding claws is four, and the cross section of the holding claws corresponds to that of the holding claws.

The turbine 6 comprises a body, and a plurality of arc-shaped racks distributed in a turbine shape are arranged on the upper surface of the body. The inner end part of the arc-shaped rack is positioned at the inner side of the front arc-shaped rack, and the outer end part of the arc-shaped rack is positioned at the outer side of the rear arc-shaped rack. The height of the arc-shaped rack is gradually increased from the inner end to the outer end of the arc-shaped rack. The inner end of the arc-shaped rack is provided with a guide surface.

The utility model discloses a base 1 and advance pen cover 25, advance pen cover 25 on be equipped with into a hole, advance pen cover 25 with base 1 be connected. The first pen feeding assembly 8, the second pen feeding assembly 9 and the turbine 6 are all arranged in a cavity formed by the base 1 and the pen feeding cover 25. The middle part of the lower surface of the turbine 6 is provided with a rotating shaft, and the rotating shaft penetrates through the bottom surface 2 of the base 1 and is exposed outside the base 1. The middle part of the turbine 6 is provided with a through hole for the pencil to pass through.

The utility model is used for with the supporting use of penknife, during the equipment, be connected the turbine pivot of automatic pencil mechanism of advancing and penknife hobbing cutter subassembly, roll rotation can drive turbine 6 and rotate.

One of the embodiments is as follows:

in the embodiment, an automatic pen feeding mechanism is provided, which comprises a base 1, wherein a turbine 6 is connected to the base 1, and a first pen feeding assembly 8 and a second pen feeding assembly 9 are connected to the turbine 6.

The first pen feeding assembly 8 comprises a first impeller 10, a first impeller shaft 11, a first pen feeding rubber roller 12 and a clutch 13, the first impeller 10 is connected with the first impeller shaft 11 through the clutch 13, the first pen feeding rubber roller 12 is rotatably connected with the first impeller shaft 11, the first impeller 10 is meshed with a turbine 6, the first impeller shaft 11 is rotatably connected with the first side surface 3 and the second side surface 4 of the base 1, one end, far away from the first impeller 10, of the first impeller shaft 11 is connected with a first spring support sleeve 17 and a first spring 18, the first spring support sleeve 17 is sleeved on the first impeller shaft 11, one end of the first spring 18 is connected to the first spring support sleeve 17, and the other end of the first spring is connected to the bottom surface 2.

The second pen feeding assembly 9 comprises a second impeller 14, a second impeller shaft 15 and a second pen feeding rubber roller 16, the second impeller 14 and the second impeller shaft 15 are fixedly connected, the second pen feeding rubber roller 16 is rotatably connected with the second impeller shaft 15, the second impeller 14 is meshed with the turbine 6, the second impeller shaft 15 is rotatably connected with the first side surface 3 and the second side surface 4 of the base 1, one end, far away from the second impeller 14, of the second impeller shaft 15 is connected with a second spring support sleeve 19 and a second spring 20, the second spring support sleeve 19 is sleeved on two impellers of the second impeller shaft 15, one end of the second spring 20 is connected to the second spring support sleeve 19, and the other end of the second spring is connected to the bottom surface 2.

The first pen feeding rubber roll 12 comprises a first rubber roll body 21 and a first shaft inlet 22, and the diameter of the first shaft inlet 22 is more than 2 mm larger than that of the first impeller shaft 11.

The second pen feeding rubber 16 roll comprises a second rubber roll body 23 and a second shaft inlet 24, and the diameter of the second shaft inlet 24 is more than 2 mm larger than that of the second impeller shaft 15.

The base 1 further comprises a first side surface 3 and a second side surface 4, two ends of the first impeller shaft 11 are rotatably connected to the first side surface 3 and the second side surface 4, a rotating connection position of one end, sleeved with the first spring support sleeve 17, of the first impeller shaft 11 and the second side surface 4 is a first connection port 26, a rotating connection position of the other end of the first impeller shaft 11 and the first side surface 3 is a second connection port 27, the first connection port 26 is of an inclined full-oval structure, the second connection port 27 is of a vertical semi-oval structure, and on the basis that one end of the first impeller shaft 11 is under the action of a spring, a corresponding full-oval interface is arranged to provide a moving space for the first spring 18 to change the position of the first impeller shaft 11.

The two ends of the second impeller shaft 15 are rotatably connected to the first side surface 3 and the second side surface 4, a third connecting port 28 is arranged at the rotary connection position of one end, sleeved with the second spring support sleeve 19, of the second impeller shaft 15 and the first side surface 3, a fourth connecting port 29 is arranged at the rotary connection position of the other end of the second impeller shaft 15 and the second side surface 4, the third connecting port 28 is of an inclined full-oval structure, and the fourth connecting port 29 is of a vertical semi-oval structure.

The working principle of the embodiment is as follows: when a pen is not fed, the first pen feeding rubber roller 12 and the second pen feeding rubber roller 16 lean against each other under the action of a first spring 18 and a second spring 20, when the pen is fed, a pencil generates an outward force on the first pen feeding rubber roller 12 and the second pen feeding rubber roller 16, the two pen feeding rubber rollers are outwards opened under the action of the outward force, the extrusion springs are deformed, a space capable of accommodating the pencil is formed between the two pen feeding rubber rollers, and under the action of the spring force, the two pen feeding rubber rollers have an extrusion force towards the pencil, so that the pencil can be fixed, meanwhile, the turbine 6 is driven by a hob of the pencil sharpener to rotate anticlockwise in the vertical direction, the meshing surface of the turbine 6 generates a force which is anticlockwise biased towards the center of a circle, and the force acts on the meshing surface of the first impeller 10 to push the first impeller 10 to rotate anticlockwise in the horizontal direction; the second impeller 14 rotates clockwise in the horizontal direction due to the opposite direction. The first impeller 10 and the second impeller 14 drive the two pen feeding rubber rollers to rotate inwards in the horizontal direction, and the pen feeding rubber rollers generate downward force in the vertical direction to realize automatic pen feeding.

When withdrawing a pen, the hobbing cutter is clockwise rotated, the meshing surface of the turbine 6 pushes the meshing surface of the first impeller 10, the first impeller 10 is anticlockwise rotated in the horizontal direction, the second impeller 14 is clockwise rotated in the horizontal direction, the first impeller 10 and the second impeller 14 drive two pen feeding rubber rolls, the horizontal direction is outwards rotated, the pen feeding rubber rolls to generate an upward force in the vertical direction, automatic pen withdrawing is realized, after withdrawing a pen, a pencil is separated from the two pen feeding rubber rolls, and the two pen feeding rubber rolls recover to an original close state under the reset action of the two springs.

The second embodiment:

The first pen feeding assembly comprises a first impeller 10, a first impeller shaft 11, a first pen feeding rubber roller 12 and a clutch 13, the first impeller 10 is connected with the first impeller shaft 11 through the clutch 13, the first pen feeding rubber roller 12 is rotatably connected with the first impeller shaft 11, the first impeller 10 is meshed with a turbine 6, the first impeller shaft 11 is rotatably connected with a first side surface 3 and a second side surface 4 of the base 1, one end, far away from the first impeller 10, of the first impeller shaft 11 is connected with a first spring support sleeve 17 and a first spring 18, the first spring support sleeve 17 is sleeved on the first impeller shaft 11, one end of the first spring 18 is connected to the first spring support sleeve 17, and the other end of the first spring is connected to the bottom surface 1.

The second pen feeding assembly 9 comprises a second impeller 14, a second impeller shaft 15 and a second pen feeding rubber roll 16, wherein the second impeller 14 is fixedly connected with the second impeller shaft 15, the second pen feeding rubber roll 16 is rotatably connected with the second impeller shaft 15, the second impeller 14 is meshed with the turbine 6, and the second impeller shaft 15 is rotatably connected with the first side surface 3 and the second side surface 4 of the base 1.

The second pen feeding rubber roller 16 comprises a second rubber roller body 23 and a second shaft inlet 24, and the diameter of the second shaft inlet 24 is larger than the diameter of the second impeller shaft 15 by more than 2 mm.

The two ends of the second impeller shaft 15 are rotatably connected to the first side surface 3 and the second side surface 4, the rotary connection position of one end, far away from the second impeller, of the second impeller shaft and the first side surface is a third connector, the rotary connection position of the other end of the second impeller shaft and the second side surface is a fourth connector, the third connector is of an inclined full-oval structure, and the fourth connector is of a vertical semi-oval structure.

The working principle of the embodiment is as follows: when a pen is not fed, the first pen feeding rubber roller 12 is pushed by a first spring and is abutted against the second pen feeding rubber roller 16, when the pen is fed, a pencil generates an outward force on the first pen feeding rubber roller 12 and the second pen feeding rubber roller 16, the first pen feeding rubber roller 12 is outwards opened under the action of the outward force to extrude the first spring 18 to generate deformation, a space capable of accommodating the pencil is formed between the two pen feeding rubber rollers, and under the action of the force of the first spring 18, the first pen feeding rubber roller 12 has an extruding force to the pencil to enable the pencil to be fixed, meanwhile, the turbine 6 is driven by a hob of a pencil sharpener to rotate anticlockwise in the vertical direction, the meshing surface of the turbine 6 generates a force which is biased towards the center of a circle in the anticlockwise direction, and the force acts on the meshing surface of the first impeller 10 to push the first impeller 10 to rotate anticlockwise in the horizontal direction; the second impeller 14 rotates clockwise in the horizontal direction due to the opposite direction. The first impeller 10 and the second impeller 14 drive the two pen feeding rubber rollers to rotate inwards in the horizontal direction, and the pen feeding rubber rollers generate downward force in the vertical direction to realize automatic pen feeding.

When withdrawing a pen, the hob is rotated clockwise, the meshing surface of the turbine 6 pushes the meshing surface of the first impeller 10, the first impeller 10 rotates anticlockwise in the horizontal direction, the second impeller 14 rotates clockwise in the horizontal direction, the first impeller 10 and the second impeller 14 drive the two pen feeding rubber rollers to rotate outwards in the horizontal direction, the pen feeding rubber rollers generate an upward force in the vertical direction, automatic pen withdrawing is realized, after withdrawing a pen, the pencil is separated from the two pen feeding rubber rollers, and the first pen feeding rubber roller 12 is restored to the original closing state under the resetting action of the first spring 18.

The third embodiment:

in the embodiment, an automatic pen feeding mechanism is provided, which comprises a base, wherein a turbine is connected to the base, and a first pen feeding assembly and a second pen feeding assembly are connected to the turbine.

The first pen feeding assembly comprises a first impeller 10, a first impeller shaft 11, a first pen feeding rubber roll 12 and a clutch 13, wherein the first impeller 10 is connected with the first impeller shaft 11 through the clutch 13, the first pen feeding rubber roll 12 is rotatably connected with the first impeller shaft 11, the first impeller 10 is meshed with a turbine 6, and the first impeller shaft 11 is rotatably connected with a first side surface 3 and a second side surface 4 of a base 1.

The second pen feeding assembly 9 comprises a second impeller 14, a second impeller shaft 15 and a second pen feeding rubber roller 16, the second impeller 14 and the second impeller shaft 15 are fixedly connected, the second pen feeding rubber roller 16 is rotatably connected with the second impeller shaft 15, the second impeller 14 is meshed with the turbine 6, the second impeller shaft 15 is rotatably connected with the first side surface 3 and the second side surface 4 of the base 1, one end, far away from the second impeller 14, of the second impeller shaft 15 is connected with a second spring support sleeve 19 and a second spring 20, the second spring support sleeve 19 is sleeved on two impellers of the second impeller shaft 15, one end of the second spring 20 is connected to the second spring support sleeve 19, and the other end of the second spring is connected to the bottom surface 1.

The first pen feeding rubber roll 12 comprises a first rubber roll body 21 and a first shaft inlet 22, and the diameter of the first shaft inlet 22 is more than 2 mm larger than that of the first impeller shaft.

The second pen feeding rubber roller 16 comprises a second rubber roller body 23 and a second shaft inlet 24, and the diameter of the second shaft inlet 24 is larger than the diameter of the second impeller shaft by more than 2 mm.

The base 1 further comprises a first side surface 3 and a second side surface 4, two ends of the first impeller shaft 11 are rotatably connected to the first side surface 3 and the second side surface 4, a rotating connection position of one end, far away from the first impeller 10, of the first impeller shaft 11 and the second side surface 4 is a first connection port 26, a rotating connection position of the other end of the first impeller shaft 11 and the first side surface 3 is a second connection port 27, the first connection port 26 is of a vertical semi-elliptical structure, and the second connection port 27 is of a vertical semi-elliptical structure.

The base 1 further comprises a first side surface 3 and a second side surface 4, two ends of a second impeller shaft 15 are rotatably connected to the first side surface 3 and the second side surface 4, a third connecting port 28 is arranged at the position where one end of the second impeller shaft 15, which is sleeved with a second spring support sleeve 19, is rotatably connected with the first side surface 3, a fourth connecting port 29 is arranged at the position where the other end of the second impeller shaft 15 is rotatably connected with the second side surface 4, the third connecting port 28 is of an inclined full-oval structure, and the fourth connecting port 29 is of a vertical semi-oval structure.

The working principle of the embodiment is as follows: when a pen is not fed, the second pen feeding rubber roller 16 is leaned against the first pen feeding rubber roller 12 under the action of a second spring, when the pen is fed, a pencil generates an outward force on the first pen feeding rubber roller 12 and the second pen feeding rubber roller 16, the second pen feeding rubber roller 16 is outwards opened under the action of the outward force, the extrusion spring generates deformation, a space capable of accommodating the pencil is formed between the two pen feeding rubber rollers, the second pen feeding rubber roller 16 has an extrusion force to the pencil under the action of the spring, the pencil can be fixed, the turbine 6 is driven by the hob of the pencil sharpener to rotate anticlockwise in the vertical direction, the meshing surface of the turbine 6 generates a force which deviates anticlockwise from the center direction, and the force acts on the meshing surface of the first impeller 10 to push the first impeller 10 to rotate anticlockwise in the horizontal direction; the second impeller 14 rotates clockwise in the horizontal direction due to the opposite direction. The first impeller 10 and the second impeller 14 drive the two pen feeding rubber rollers to rotate inwards in the horizontal direction, and the pen feeding rubber rollers generate downward force in the vertical direction to realize automatic pen feeding.

When withdrawing a pen, the hob is rotated clockwise, the meshing surface of the turbine 6 pushes the meshing surface of the first impeller 10, the first impeller 10 rotates anticlockwise in the horizontal direction, the second impeller 14 rotates clockwise in the horizontal direction, the first impeller 10 and the second impeller 14 drive the two pen feeding rubber rollers to rotate outwards in the horizontal direction, the pen feeding rubber rollers generate an upward force in the vertical direction, automatic pen withdrawing is realized, after withdrawing a pen, the pencil is separated from the two pen feeding rubber rollers, and the second pen feeding rubber rollers 16 recover to an original close state under the reset action of the second spring 20.

The utility model has the advantages of compact structure, reliable work, stable transmission, high efficiency, long service life, low noise, capability of ensuring constant transmission ratio and capability of sharpening pencils of any size and model.

Claims

1. An automatic advance a mechanism, includes support (30) and advances a subassembly (5), its characterized in that: the support (30) is elastically connected with the pen feeding assembly (5).

2. The automatic pen feeding mechanism of claim 1, wherein: the support (30) comprises a base (1), the base (1) comprises a bottom surface (2), and the pen feeding assembly (5) is elastically connected with the bottom surface (2) through a spring mechanism (7).

3. An automatic pen feeding mechanism according to claim 2, characterized in that: the pen feeding assembly (5) comprises a first pen feeding assembly (8) and a second pen feeding assembly (9), the first pen feeding assembly (8) comprises a clutch (13), a first impeller (10) meshed with the turbine (6) and a first impeller shaft (11) connected with the first impeller (10) through the clutch (13);

the second pen feeding assembly (9) comprises a second impeller (14) engaged on the turbine (6) and a second impeller shaft (15) fixedly connected with the second impeller (14).

4. An automatic pen feeding mechanism according to claim 3, characterized in that: the spring mechanism (7) comprises a first spring support sleeve (17) and a first spring (18), the first spring support sleeve (17) is sleeved on the first impeller shaft (11), one end of the first spring (18) is connected to the first spring support sleeve (17), and the other end of the first spring (18) is connected to the bottom surface (2).

5. An automatic pen feeding mechanism according to claim 3, characterized in that: the spring mechanism (7) further comprises a second spring support sleeve (19) and a second spring (20), the second spring support sleeve (19) is sleeved on the second impeller shaft (15), one end of the second spring (20) is connected to the second spring support sleeve (19), and the other end of the second spring (20) is connected to the bottom surface (2).

6. An automatic pen feeding mechanism according to claim 4, characterized in that: the base (1) further comprises a first side surface (3) and a second side surface (4), two ends of the first impeller shaft (11) are rotatably connected to the first side surface (3) and the second side surface (4), the first spring support sleeve (17) is sleeved at one end, far away from the first impeller (10), of the first impeller shaft (11), a first connecting port (26) is arranged at the position where one end, sleeved with the first spring support sleeve (17), of the first impeller shaft (11) is rotatably connected with the first side surface (3) or the second side surface (4), the other end of the first impeller shaft (11) is rotatably connected with the first side surface (3) or the second side surface (4) is a second connecting port (27), the first connecting port (26) is of an inclined full-oval structure, and the second connecting port (27) is of a vertical semi-oval structure.

7. An automatic pen feeding mechanism according to claim 5, characterized in that: the base (1) further comprises a first side face (3) and a second side face (4), two ends of a second impeller shaft (15) are rotatably connected to the first side face (3) and the second side face (4), a second spring support sleeve (19) is sleeved at one end, far away from a second impeller (14), of the second impeller shaft (15), a third connecting port (28) is formed in the position, where one end, sleeved with the second spring support sleeve (19), of the second impeller shaft (15) is rotatably connected with the first side face (3) or the second side face (4), a fourth connecting port (29) is formed in the position, rotatably connected with the first side face (3) or the second side face (4), of the other end of the second impeller shaft (15), the third connecting port (28) is of an inclined full-oval structure, and the fourth connecting port (29) is of a vertical semi-oval structure.

8. An automatic pen feeding mechanism according to claim 3, characterized in that: the first impeller shaft (11) is connected with a first glue feeding roller (12) in a rotating mode, the first glue feeding roller (12) comprises a first glue roller body (21) and a first shaft feeding opening (22), and the diameter of the first shaft feeding opening (22) is larger than that of the first impeller shaft (11).

9. An automatic pen feeding mechanism according to claim 3, characterized in that: the second impeller shaft (15) is further rotatably connected with a second pen feeding rubber roller (16), the second pen feeding rubber roller (16) comprises a second rubber roller body (23) and a second shaft feeding opening (24), and the diameter of the second shaft feeding opening (24) is larger than that of the second impeller shaft (15).