CN113442630A

CN113442630A - Pencil feeding device of pencil sharpener

Info

Publication number: CN113442630A
Application number: CN202010228637.1A
Authority: CN
Inventors: 王金福
Original assignee: Fujian Soundy Enterprise Co Ltd
Current assignee: Fujian Soundy Enterprise Co Ltd
Priority date: 2020-03-27
Filing date: 2020-03-27
Publication date: 2021-09-28
Also published as: WO2021189593A1

Abstract

The invention relates to a pencil feeding device of a pencil sharpener, which comprises a support, a positioning frame and a rotating shaft, wherein one side of the support is provided with a transmission disc and a rotating disc, the transmission disc can be driven by a hobbing device of the pencil sharpener to rotate and drives the rotating disc, the surface of the rotating disc is provided with a plurality of friction grains, the positioning frame is movably pivoted with a plurality of positioning shafts, the rotating shaft is arranged on the positioning shafts, each rotating shaft is provided with a pencil clamping roller and a friction wheel, the pencil clamping roller is used for clamping and propelling a pencil, and the friction wheel can be driven by the friction transmission energy of the rotating disc. The pencil clamping roller forms an adjustable clamping opening by the rotation of the friction wheel and the positioning shaft, can automatically adjust the size of the clamping opening to clamp pencils with different diameters and different appearance shapes, ensures that the center position of the pencil is maintained at the hobbing center line of the pencil sharpener, can smoothly and automatically feed the pencil during sharpening, and can easily withdraw the pencil after sharpening.

Description

Pencil feeding device of pencil sharpener

The technical field is as follows:

the invention belongs to the field of stationery, and particularly relates to a pencil feeding device of a pencil sharpener, which is particularly suitable for automatically adjusting the size of a clamping opening of pencils with different surface shapes and diameters and performing clamping action, can smoothly and automatically feed the pencils during sharpening, and can easily withdraw the pencils after sharpening.

Background art:

a conventional pencil sharpener has a pencil clamping and feeding device for clamping a pencil shaft and feeding the pencil shaft into a hobbing device, which is disposed outside the front surface of a sharpener housing and is positioned on the housing by a pair of guide rods elastically retractable and parallel projecting into the housing. When the pencil is cut, the chuck of the pencil feeding device is pulled out along the elastic force of the restoring springs at the inner ends of the guide rods along the pair of guide rods, then the chuck operating handle is pressed to open the clamping opening of the chuck, the pencil is inserted until the front end of the pencil enters the conical hole of the chip rolling device, the external force of the operating handle is released, the chuck reduces the clamping opening to clamp the pencil holder, the elastic restoring force of the guide rods gives the force for feeding the pencil holder to the chip rolling device, and then the pencil holder gradually advances forward until the cutting operation of the tip of the pencil is completed as the chip rolling device is rotated by the hand handle. After the pencil is cut, when the pencil is taken out, the operating handle is pressed to open the clamping opening of the chuck, and then the pencil can be taken out.

The operation of the pen clamping and feeding device is very complicated, the guide rod is often pulled out once again due to insufficient length, or the operating handle is released too early, so that the chuck is impacted with strong force to the shell of the pen sharpener, ear piercing sound is generated, and even the accidental situation of clamping fingers occurs, if carelessness happens, and simultaneously, the tooth-shaped clamping surfaces of the three clamping blocks of the chuck are easy to bite the surface of the pen holder, so that the painted surface or printing falls off or tooth marks are left.

In view of the above, the applicant has made appropriate improvements to the conventional pencil sharpener and recorded in the patent publications, such as chinese patent application No. 201020647480.8, an automatic pencil feeding device of pencil sharpener, and patent application No. 201320265052.2, a self-discharging type pencil sharpener automatic pencil feeding device, and the disclosed pencil sharpener automatic pencil feeding and discharging device.

The patent application number is 201020647480.8, and discloses an automatic pencil feeding device of a pencil sharpener, which comprises a bracket and a turntable, wherein two pairs of clamping wheel bearing seats of the bracket are respectively positioned with a rotating shaft, the rotating shaft is sequentially sleeved with a pencil clamping rotating wheel and a friction wheel, and the two friction wheels are positioned at the far ends of the two rotating shafts; the rotary table is arranged in the center of the two pairs of clamping wheel bearing seats, through holes for the penholders to pass through are formed in the centers of the support and the rotary table, a transmission disc is placed in a sinking shaft seat on one side of the support, facing the rotary table, the center of the transmission disc is provided with a connecting hole for the hollow penholder guiding taper hole end part of the hob seat to be inserted, more than two grooves are formed in the circumference of the end face of the transmission disc, and each groove is provided with an inclined bottom; the end face of one side of the rotary disc close to the transmission disc is convexly provided with a corresponding shifting fork, and the shifting fork is inserted into the groove to form linkage. The rotary power is transmitted by the aid of the transmission disc, and the inclined bottom on the groove of the transmission disc has different forces of abutting against the rotary disc when rotating forwards and backwards, so that the friction force generated between the rotary disc and the friction wheel is different, and two different hand feelings of tightness when a pen is given and looseness when the pen is withdrawn are generated.

The bulletin number is 201320265052.2, and discloses a self-discharging pencil sharpener pencil feeding device, which comprises a pinch roller seat and a turntable which are fixed in a pencil sharpener shell, wherein two pairs of pinch roller bearings extend towards the same side of the pinch roller seat, and two rotating shafts with rubber pinch rollers are respectively positioned on the two pairs of pinch roller bearings; the rotary table is arranged in the center of the two pairs of pinch roller bearings and is arranged between the rubber pinch rollers and the pinch roller seats, the center of the rotary table is provided with a connecting through hole for inserting the hollow pen holder guiding taper hole end part of the hob cutter seat, and the rotary table is driven to rotate by the hob cutter seat; the connecting through hole, the penholder guiding taper hole and the pencil feeding hole of the pencil sharpener shell are positioned on the same axis, and the pencil sharpener is characterized in that at least one bearing hole in each pair of pinch roller bearings is a transverse long hole. By means of the design of the transverse long groove of the clamping wheel bearing hole, the distance between the two rubber clamping wheels can be automatically adjusted, and penholders with different calibers can be clamped for pencil sharpening.

However, although the above-mentioned two pencil clamping and feeding devices of the pencil sharpener can clamp pencils with different calibers for sharpening, the pencil clamping and feeding devices can only clamp two sides of the pencil in a relative manner, when clamping a pencil with a triangular appearance, because the triangle has three corners and the pencil clamping and feeding devices are mainly at the clamping force point and the balance function, at most one corner at one side of the pencil and one side at the other side of the pencil can be clamped, so that the center position of the triangular pencil deviates from the hobbing center line of the pencil sharpener, and thus the cutting surfaces around the triangle pencil after being cut are not uniform, i.e. the cutting surface at one side of the pencil is larger and the cutting surface at the other side of the pencil is smaller, besides the appearance is not good, the pencil holding posture is incorrect, the pencil holding posture is not correct, and the pencil feels uncomfortable.

Therefore, if the triangular pencil can be clamped and the center position of the triangular pencil can be maintained at the hobbing center line of the pencil sharpener, the cutting surface of the triangular pencil on the circumference after being cut can be relatively even.

How to improve the pencil sharpeners to make the functions more perfect and ideal becomes the key point of research and development of the inventor.

The invention content is as follows:

the object of the present invention is to provide a pencil feeding device for a pencil sharpener, which can automatically adjust the size of a clamping opening of pencils with different diameters and different shapes to clamp the pencils, and ensure that the center position of the pencil is maintained at the center line of the pencil sharpener, and can smoothly and automatically feed and withdraw the pencils during the sharpening process.

The technical scheme of the invention is realized as follows: a pencil feeding device of a pencil sharpener comprises:

the support is arranged on the shell of the pencil inlet of the pencil sharpener, one side of the support is provided with a transmission disc and a rotating disc, the transmission disc can be driven by a hobbing device of the pencil sharpener to rotate and is connected with the rotating disc, the transmission disc and the rotating disc are respectively provided with a connecting hole and a through hole through which a pencil can penetrate and are communicated with the pencil inlet, and the surface of the rotating disc is provided with a plurality of friction grains;

a positioning frame combined with the support, wherein the positioning frame is movably pivoted with a plurality of positioning shafts facing the turntable;

the rotating shafts are arranged on the positioning shaft, each rotating shaft is provided with a pencil clamping roller and a friction wheel, the pencil clamping rollers are in a state of surrounding through holes of the rotating disc and are used for rolling towards the through holes to clamp and push the pencil, and the friction wheels can be driven by friction transmission energy of the rotating disc so as to enable the positioning shaft, the rotating shafts and the pencil clamping rollers to rotate.

The transmission disc is provided with a plurality of tooth grooves around the circumference, one side of the rotating disc is provided with a plurality of convex pins corresponding to the tooth grooves, the convex pins are respectively inserted into the corresponding tooth grooves, and when the transmission disc is driven by the hobbing device of the pencil sharpener to rotate, the rotating disc is driven to rotate by the clamping action of the tooth grooves and the convex pins.

When the driving disc rotates to enable the convex pin to be positioned at the tooth socket inclined part, the rotating disc not only moves towards the friction wheel, but also simultaneously pushes the driving disc; one side of the transmission disc is provided with a plurality of elastic pieces which are pressed on the surface of the support, so that when the transmission disc is pushed by the turntable, the elastic pieces are compressed to generate elastic force which can elastically push the turntable to tightly contact the friction wheel.

The friction lines are radial.

The positioning frame is provided with a plurality of pivoting holes, and the positioning shaft can penetrate through and be clamped in the pivoting holes by the elastic hooks so that the positioning shaft can rotate on the positioning frame without falling to the ground.

The positioning frame is provided with a plurality of combining parts which can be correspondingly clamped and combined with the combining holes arranged on the support seat by the elastic hooks.

The positioning shaft is provided with a positioning plate which is provided with a truncated side surface, one side of the positioning plate is provided with a bearing seat for arranging the rotating shaft, and the positioning frame is provided with a flange for enabling the truncated side surface of the positioning plate to be stopped by the flange to achieve angular positioning when the positioning shaft rotates inwards for an angle relatively.

The positioning frame has several L-shaped protruding limiting plates to stop the friction wheel from excessive axial movement on the rotating shaft, and when the positioning shaft rotates outwards by an angle, the surface of the friction wheel is stopped by the limiting plates to achieve angular positioning.

The friction wheel is arranged on a sleeve body, the sleeve body is arranged on the rotating shaft, a convex key and a key groove matching structure can be arranged between the sleeve body and the rotating shaft, the sleeve body can drive the rotating shaft to rotate and can also move along the axial direction of the rotating shaft by the embedding of the convex key and the key groove, and the rotating shaft is provided with a stopping body for stopping the sleeve body and the friction wheel from excessive axial movement on the rotating shaft.

The positioning frame is provided with three pivoting holes and three limiting plates and is positioned at trisection positions of the concentric circle; each pin joint hole is movably positioned with a positioning shaft, each positioning shaft is movably positioned with a rotating shaft, and the friction wheel can be abutted against the corresponding limiting plate along with the rotation of the rotating shaft.

The invention has the characteristics of ingenious conception, reasonable design, simple operation and wide adaptability; the pencil sharpener can not only meet the requirements of cutting penholders with different diameters, but also be compatible with the cutting of penholders with different appearances such as hexagon and triangle, can automatically adjust the size of the clamping opening and apply clamping force, and ensures that the center position of the pencil is maintained at the hobbing center line of the pencil sharpener, namely the center cutting of a pencil core is ensured, and the automatic advancing and retreating functions in the cutting process are also ensured.

Description of the drawings:

the invention is further illustrated with reference to the following specific figures:

FIG. 1 is a side view of the present invention in combination with a hobbing apparatus

FIG. 2 is an exploded perspective view of the present invention

FIG. 3 is a perspective view of the positioning frame and the rotating shaft of the present invention

FIG. 4 is a perspective view of the positioning frame with the rotating shaft removed

FIG. 5 is a cross-sectional view of an embodiment of the present invention

FIG. 6 is a top view of an embodiment of the present invention in use

FIG. 7A, FIG. 7B and FIG. 7C are schematic views showing the continuous operation of the present invention before, during and during the clamping of a pencil with a triangular holder

FIGS. 8A, 8B and 8C are schematic views showing the continuous operation of the round holder pencil of the present invention before, during, and during feeding

Wherein

1-pen feeding device 10-support 11-combined hole

20-positioning frame 21-positioning shaft 211-positioning plate 212-bearing seat

22-pivot hole 23-combining part 24-flange 25-limiting plate

30-rotating shaft 31-pen clamping roller 32-friction wheel 33-sleeve body

34-stop body

40-transmission disc 41-connecting hole 42-tooth space 43-elastic sheet

50-rotating disc 51-through hole 52-friction grain 53-convex pin

80-pencil 91-hobbing device 92-rocking handle 93-hollow rotating shaft

The specific implementation mode is as follows:

referring to fig. 1 to 5, the pencil feeding device 1 of the pencil sharpener of the present invention comprises a support 10, a positioning frame 20, and a rotating shaft 30.

As will be described in detail below:

the support 10 is disposed on a housing of a pencil inlet of the pencil sharpener (the housing is conventional and is not shown), one side of the support 10 is provided with a transmission disc 40 and a rotation disc 50, the transmission disc 40 can be driven by a hobbing device 91 of the pencil sharpener to rotate and drive the rotation disc 50, the transmission disc 40 and the rotation disc 50 are respectively provided with a connecting hole 41 and a through hole 51 through which a pencil can pass and communicate with the pencil inlet, and the surface of the rotation disc 50 is provided with a plurality of friction grains 52.

The positioning frame 20 is combined with the support 10, and the positioning frame 20 is movably pivoted with a plurality of positioning shafts 21 facing the turntable 50.

The rotating shaft 30 is arranged on the positioning shafts 21, that is, a rotating shaft 30 is correspondingly arranged on each positioning shaft 21; each shaft 30 has a pen-holding roller 31 and a friction wheel 32, wherein the pen-holding roller 31 is in a state of surrounding the through hole 51 of the rotary plate 50 for rolling toward the through hole 51 to pinch and advance the pencil, and the friction wheel 32 can be driven by the friction transmission energy of the rotary plate 50, so as to rotate the positioning shaft 21, the shaft 30 and the pen-holding roller 31.

Furthermore, the transmission disc 40 has a plurality of tooth slots 42 around the circumference, a plurality of protruding pins 53 corresponding to the tooth slots 42 are disposed on one side of the rotation disc 50, the protruding pins 53 are inserted into the corresponding tooth slots 42, respectively, so that when the transmission disc 40 is driven by the hobbing device 91 of the pencil sharpener to rotate, the rotation disc 50 is driven to rotate by the locking action of the tooth slots 42 and the protruding pins 53.

Further, when the driving plate 40 rotates to position the protruding pin 53 at the inclined portion of the tooth groove 42, the rotating plate 50 not only moves toward the friction wheel 32 but also simultaneously presses the driving plate 40; one side of the transmission disc 40 is provided with a plurality of elastic pieces 43, the elastic pieces 43 are pressed on the surface of the support 10, so that when the transmission disc 40 is pushed by the turntable 50, the elastic pieces 43 are compressed to generate an elastic force, and the turntable 50 can be elastically pushed to be tightly contacted with the friction wheel 32.

Further, the friction ridges 52 are radial.

Furthermore, the positioning frame 20 has a plurality of pivot holes 22, and the positioning shaft 21 can be inserted through and fastened to the pivot holes 22 by means of an elastic hook, so that the positioning shaft 21 can rotate on the positioning frame 20 without falling to the ground.

Furthermore, the positioning frame 20 has a plurality of engaging portions 23, and the engaging portions 23 can be correspondingly engaged with the engaging holes 11 of the supporting base 10 by elastic hooks.

Furthermore, the positioning shaft 21 is provided with a positioning plate 211, the positioning plate 211 has a cut-off side, one side of the positioning plate 211 is provided with a bearing seat 212 for installing the rotating shaft 30, and the positioning frame 20 has a flange 24, so that when the positioning shaft 21 rotates inward by an angle relatively, the cut-off side of the positioning plate 211 is stopped by the flange 24 to achieve angular positioning, thereby preventing the rotating shaft 30 from rotating excessively by an angle relatively (i.e. when a pen is fed).

Furthermore, the positioning frame 20 has a plurality of L-shaped protruding limiting plates 25 for stopping the friction wheel 32 from excessive axial movement on the rotating shaft 30, and when the positioning shaft 21 rotates outward at an angle, the surface of the friction wheel 32 is stopped by the limiting plates 25 to achieve angular positioning, so as to prevent the rotating shaft 30 from rotating outward at an excessive angle (i.e. when the pen is withdrawn).

Furthermore, the friction wheel 32 is disposed on a sleeve 33, the sleeve 33 is disposed on the rotating shaft 30, a fitting structure of a convex key and a key slot is disposed between the sleeve 33 and the rotating shaft 30, the sleeve 33 can drive the rotating shaft 30 to rotate and can also move axially along the rotating shaft 30 by the engagement of the convex key and the key slot, and the rotating shaft 30 is provided with a stopper 34 for stopping the sleeve 33 and the friction wheel 32 from excessive axial movement on the rotating shaft 30.

In summary, the positioning frame 20 is preferably provided with three pivoting holes 22 and three limiting plates 25, and is located at the trisection position of the concentric circle; a positioning shaft 21 is movably positioned in each pivot hole 22, a rotating shaft 30 is movably positioned on each positioning shaft 21, and a friction wheel 32 can abut against the corresponding limiting plate 25 along with the rotation of the rotating shaft so as to meet the requirements of clamping triangular, hexagonal and round penholders.

The above description is provided for each component and its assembly of the present invention, and the following description is provided for the use embodiments, features and benefits of the present invention:

referring to fig. 1, fig. 6, fig. 7A, fig. 7B, and fig. 7C, an example of using the triangular pen holder pencil 80 of the present invention for clamping and feeding a pencil is as follows:

when the pencil 80 is inserted into the through hole 51 of the rotary disc 50 through the positioning frame 20, and the rocking handle 92 is shaken to rotate the hobbing device 91, the transmission disc 40 is driven by the hollow rotary shaft 93, and the rotary disc 50 is driven to rotate by the locking action of the tooth grooves 42 and the convex pins 53, the rotary disc 50 can drive the friction wheel 32 to rotate, and simultaneously the rotary shaft 30 and the pencil clamping roller 31 to rotate correspondingly and inwards, because the friction wheel 32 generates a thrust force axially towards the rotary shaft 30 when rotating, the positioning shaft 21 rotates, and the rotary shaft 30 and the pencil clamping roller 31 correspondingly move inwards to form an adjustable clamping mouth, so as to exert the automatic pencil clamping action of the pencil 80, the pencil clamping roller 31 can also automatically adjust, ensure that the center position of the pencil 80 is maintained at the hobbing center line of the pencil sharpener, the cutting surface around the pencil 80 after being cut is even and beautiful, the user has correct pencil holding posture and conforms to the pencil engineering, comfortable pen holding feeling.

When the pencil-clamping roller 31 continues to rotate inward in response to the automatic pencil-clamping action of the pencil 80, the pencil 80 is pinched and pushed toward the back of the cutting taper hole of the hobbing device 91 to form a smooth and smooth pencil-feeding action for cutting.

When the pencil 80 is cut, the rocking handle 92 is reversely shaken, the transmission disc 40 drives the rotary disc 50 to rotate reversely, the friction wheels 32 and the pencil clamping roller 31 correspondingly rotate outwards in a reverse direction, and meanwhile, the positioning shaft 21 rotates reversely, so that the rotating shaft 30 and the pencil clamping roller 31 correspondingly move outwards, the pencil 80 is not clamped and enters by the pencil 80, and the pencil 80 can be easily and smoothly withdrawn.

Referring to fig. 8A, 8B and 8C, the operation principle, the operation mode and the functions of the pencil 80 with the circular holder according to the present invention are the same as those of the pencil 80 with the triangular holder, and thus are not described again.

In summary, the rotation of the friction wheel and the positioning shaft enables the pencil clamping roller to form an adjustable clamping opening, the size of the clamping opening can be automatically adjusted to clamp pencils with different diameters and different appearance shapes (such as triangle, hexagon, circle and the like), the center position of the pencil is ensured to be maintained at the rolling center line of the pencil sharpener, the cutting surface of the circumference of the cut pencil is even and beautiful, the pencil can be smoothly and automatically fed in during cutting, and the pencil can be easily withdrawn after cutting.

The above-mentioned embodiments are provided for illustrative purposes only, and should not be construed as limiting the present invention, i.e., all the various modifications and variations of the embodiments described in the claims are intended to be covered by the present invention.

Claims

1. A pencil feeding device of a pencil sharpener comprises:

2. The pencil sharpener feeding device of claim 1, wherein: the transmission disc has a plurality of tooth slots around the circumference thereof, and a plurality of protruding pins corresponding to the tooth slots are disposed on one side of the rotation disc and inserted into the corresponding tooth slots respectively, so that when the transmission disc is driven by the hobbing device of the pencil sharpener to rotate, the rotation disc is driven to rotate by the engagement between the tooth slots and the protruding pins.

3. The pencil sharpener feeding device of claim 2, wherein: when the driving disc rotates to make the convex pin be positioned in the tooth socket inclined part, the rotating disc not only moves towards the friction wheel, but also simultaneously pushes the driving disc; one side of the transmission disc is provided with a plurality of elastic pieces which are pressed on the surface of the support, so that when the transmission disc is pushed by the turntable, the elastic pieces are compressed to generate elastic force which can elastically push the turntable to tightly contact the friction wheel.

4. The pencil sharpener feeding device of claim 1, wherein: the rubbing lines were radial.

5. The pencil sharpener feeding device of claim 1, wherein: the positioning frame is provided with a plurality of pivoting holes, and the positioning shaft can penetrate through and be clamped in the pivoting holes by the elastic hooks so that the positioning shaft can rotate on the positioning frame without falling to the ground.

6. The pencil sharpener feeding device of claim 1, wherein: the positioning frame has several combining parts which can be correspondingly clamped and combined with the combining holes of the support seat by the elastic hooks.

7. The pencil sharpener feeding device of claim 1, wherein: the positioning shaft is provided with a positioning plate, the positioning plate is provided with a cut-off side surface, one side of the positioning plate is provided with a bearing seat for arranging the rotating shaft, and the positioning frame is provided with a flange, so that when the positioning shaft rotates inwards for an angle relatively, the cut-off side surface of the positioning plate is stopped by the flange to achieve angle positioning.

8. The pencil sharpener feeding device of claim 1, wherein: the positioning frame has a plurality of L-shaped protruding limiting plates for stopping the friction wheel from excessive axial movement on the rotating shaft, and when the positioning shaft rotates outwards for an angle, the surface of the friction wheel is stopped by the limiting plates to achieve angular positioning.

9. The pencil sharpener feeding device of claim 1, wherein: the friction wheel is set on one sleeve, which is set on the rotating shaft, and between the sleeve and the rotating shaft, there may be one matching structure of convex key and key slot, so that the sleeve may drive the rotating shaft to rotate and move axially.

10. The pencil sharpener feed device of claim 1, 5, 6, 7 or 8, wherein: the positioning frame is provided with three pivoting holes and three limiting plates which are positioned at trisection positions of the concentric circle; each pin joint hole is movably positioned with a positioning shaft, each positioning shaft is movably positioned with a rotating shaft, and the friction wheel can be abutted against the corresponding limiting plate along with the rotation of the rotating shaft.