CN116265266A - Pen feeding mechanism and pencil sharpener with same - Google Patents

Abstract

A pen feeding mechanism includes a seat, a linkage unit, a pen clamping unit, an elastic force unit and a rotating unit. The bearing seat includes at least two radial guide grooves; the linkage unit includes at least two leading guide seats respectively sliding in the radial guide grooves, each leading guide seat has a concave arc surface, and the concave arc surface cooperates to define The front guide hole around the axis; the pen holder unit includes at least two pen holder assemblies respectively installed on the front guide seat, each pen holder assembly has a rotating shaft, and a driven gear sleeve connected to the rotating shaft Cooperating with the pen holder roller, the pen holder roller cooperates to define a pen holder hole located behind the front guide hole; the elastic unit makes the front guide seat have a constant tendency to move toward the axis; the rotation unit includes a turntable, and at least Two driving teeth are arranged on the turntable and meshed with the driven gear. Thereby, the present invention can be applied to pencils of different diameters and can reduce damage rate.

Description

Pen feeding mechanism and pencil sharpener with same

technical field

The invention relates to a pencil sharpener, in particular to a pen feeding mechanism and a pencil sharpener with the same.

Background technique

Referring to FIG. 1 , the pen feeding bracket 1 disclosed in the Chinese Utility Model Patent Grant No. CN206242767U includes a bracket assembly 11 , a rotating device 15 and a clamping device 16 . The center of the bracket assembly 11 is provided with a pen entry hole, and has a bracket 12, a knife rest holder 13 installed in the center of the bracket 12, and a rotating shaft mounted on the knife holder holder 13. The disc 14, the support 12 is provided with four support legs 121, and the support legs 121 are arranged in pairs, and the rotating disc 14 is provided with a disc gear 141. The rotating device 15 includes two rotating rods 151 arranged in parallel, two rubber rings 152 and two rotating gears 153, the two ends of each rotating rod 151 are installed on the corresponding two support legs 121 respectively, and each A rubber ring 152 and a rotating gear 153 are sleeved on the supporting rod 151 , and the rotating gear 153 meshes with the disc gear 141 of the rotating disc 14 . The front end of the clamping device 16 is installed on the front end of the bracket 12, and the rear end extends to the middle position of the upper part of the rotating device 15, and forms a circular shape with open left and right ends at the middle position of the upper part of the rotating device 15. Structure 161.

When in use, insert the pencil into the semi-open circular structure 161 formed by the clamping device 16, insert the pencil all the way to the outside of the pen inlet of the bracket assembly 11 and enter the pencil sharpener for sharpening. When the rotating disk 14 is driven to rotate, the rotating gear 153 and the rubber ring 152 can be driven to rotate through the disk gear 141, so as to achieve the effect of entering or withdrawing the pen. After the above-mentioned rubber ring 152, the pencil is continuously clamped by the clamping device 16, which can effectively prevent the pencil from falling. Although the pen feeding bracket 1 has the above-mentioned functions, there are the following problems:

1. Because the clamping device 16 and the rotating device 15 cannot move, the pen feeding bracket 1 can only be applied to pencils of one diameter, and cannot be applied to pencils of different diameters.

2. When entering the pen, because the pencil directly hits the rubber ring 152, the rubber ring 152 is easily damaged.

Contents of the invention

The object of the present invention is to provide a pencil feeding mechanism that can be used for pencils with different diameters and can reduce the damage rate.

Another object of the present invention is to provide a pencil sharpener with a pen feeding mechanism that can be used for pencils of different diameters and can reduce the damage rate.

The pen feeding mechanism of the present invention is suitable for being installed on a pencil sharpener, the pencil sharpener has a casing, a pencil sharpening mechanism installed in the casing and having a knife seat, and is installed outside the casing to drive the The rocker for the knife seat of the pen sharpening mechanism to rotate, the casing has a front cover, and the front cover has a pen feeding hole around the axis, and the pen feeding mechanism includes a seat, a linkage unit, a pen clamping unit, and an elastic unit And rotating unit; It is characterized in that:

The seat is installed and fixed on the rear side of the front cover, and includes a front face, a rear face, an outer peripheral wall connecting the front face and the rear face and surrounding the axis, connecting the front face and the rear face and surrounding the The axis forms the inner peripheral wall of the through hole, and at least two radial guide grooves extending from the inner peripheral wall toward the outer peripheral wall and communicating the front face and the rear face;

The interlocking unit includes at least two front guide seats that are respectively slid in the radial guide grooves, each front guide seat has a slider that slides in the corresponding radial guide groove, and two guide seats from the slider The first clamping block and the second clamping block that are bent and extended toward the axis on the opposite side face outward, the slider has a concave arc surface that is recessed toward the axis, and the concave arc surface of the linkage unit cooperate to define a front guide hole around the axis and behind the pen inlet hole;

The pen-holding unit includes at least two pen-holding assemblies respectively installed on the front guide seat, each pen-holding assembly has a rotatably mounted on the first clamping block and the second clamping block. The rotating shaft is sleeved on the driven gear connected to the rotating shaft and located outside the first clamping block, and the driven gear is sleeved on the rotating shaft and located between the first clamping block and the second clamping block The pen-holding roller in between, the pen-holding roller of the pen-holding unit cooperates to define a pen-holding hole around the axis and behind the front guide hole;

The elastic unit makes the front guide seat have a constant tendency to move toward the axis;

The rotating unit includes a turntable connected to the tool seat and driven by the tool seat, and at least two driving teeth arranged on the front surface of the turntable and meshing with the driven gear respectively.

In the pen feeding mechanism of the present invention, the seat includes three radial guide grooves distributed at equal angles, the linkage unit includes three front guide seats that are respectively slid in the radial guide grooves, and the pen holder The unit includes three pen holder assemblies respectively installed on the front guide seat.

In the pen-feeding mechanism of the present invention, each radial guide groove of the seat has a wide front and narrow rear, the slider also has a wide front and a narrow rear, and the concave arc surface is set on the In the front wide part, the first clamping block has a first clamping groove, the second clamping block has a second clamping groove, and the rotating shaft is installed and limited between the first clamping groove and the second clamping groove. In the clamping groove.

In the pen feeding mechanism of the present invention, the elastic unit includes at least two first elastic pieces, and the first elastic pieces are installed between the slider and the seat respectively.

In the pen-feeding mechanism of the present invention, the seat further includes several fixed blocks arranged on the rear surface, and two fixed blocks are located on both sides of a radial guide groove in pairs, and the first The elastic parts are spring wires, the middle part of each first elastic part is inserted into the corresponding sliding block, and the two ends of each first elastic part are respectively inserted into the fixing blocks.

In the pen feeding mechanism of the present invention, the elastic unit further includes at least two second elastic members, and the second elastic members are respectively installed between the slider and the pen sharpening mechanism, so that the front guide seat Has a constant tendency to move towards said axis.

According to the pen feeding mechanism of the present invention, the pen sharpening mechanism has a front fixing seat located behind the front cover, is installed and fixed on the casing and is spaced from the front fixing seat and has internal teeth around the axis The rear fixed seat of the ring, the knife seat installed between the front fixed seat and the rear fixed seat and connected to the rocker, the spiral cutter rotatably installed on the knife seat, and the connected The spiral cutter and the rotary gear meshed with the inner gear ring, the front fixed seat has at least two protrusions, the second elastic member is a torsion spring, and the second elastic member is respectively sleeved on the The protruding post is abutted against the slider and the front fixing seat.

According to the pen feeding mechanism of the present invention, the pen sharpening mechanism has a front fixing seat located behind the front cover, is installed and fixed on the casing and is spaced from the front fixing seat and has internal teeth around the axis The rear fixed seat of the ring, the knife seat installed between the front fixed seat and the rear fixed seat and connected to the rocker, the spiral cutter rotatably installed on the knife seat, and the connected The spiral cutter and the rotating gear meshed with the inner gear ring, the front fixed seat has a perforation around the axis, the turntable has the front disk surface, the rear disk surface, and the rear disk surface from the rear disk surface. The end is extended and inserted into the perforation of the front fixing seat, the insert has an inner cylinder surface surrounding the axis and forming a communication hole, and the knife seat has a pen holder inserted into the insert along the axis , the rotating unit further includes a connection assembly arranged between the inner cylindrical surface of the turntable and the pen holder.

In the pen feeding mechanism of the present invention, the connecting assembly is a keying tooth.

The pencil sharpener with a pen feeding mechanism of the present invention comprises a casing, a pencil sharpening mechanism, a rocker and a pen feeding mechanism; it is characterized in that:

The casing includes a front cover and a rear casing, and the front cover has a pen inlet hole around the axis;

The pencil sharpening mechanism is installed in the casing, and includes a front fixing seat located behind the front cover, a rear fixing seat that is fixed on the rear casing and has an inner gear ring around the axis, along the The tool seat extending from the axis and located between the front fixed seat and the rear fixed seat, the spiral cutter rotatably installed on the knife seat, and the spiral cutter connected with the internal teeth Rotary gears meshing with rings;

The handle is located outside the rear shell and connected to the knife seat to drive the knife seat to rotate;

The pen-feeding mechanism is the above-mentioned pen-feeding mechanism.

The beneficial effect of the present invention is that: the slider passing through the front guide seat can move in the corresponding radial guide groove, and can drive the pen holder assembly to move, so that the diameter of the front guide hole and the pen holder hole It can be changed, and then it can be applied to pencils of different pen diameters, and can avoid direct impact of the pencil on the pen holder roller, which can reduce the damage rate.

Description of drawings

Fig. 1 is a three-dimensional combination diagram of the pen feeder bracket disclosed by the Chinese utility model patent authorization announcement number CN206242767U;

Fig. 2 is a front perspective combined view of an embodiment of the pen feeding mechanism of the present invention and a pencil sharpener having it;

Fig. 3 is the rear view perspective combination diagram of this embodiment;

Fig. 4 is a partial three-dimensional exploded view of the embodiment, showing a front cover, a pen sharpening mechanism and a pen feeding mechanism;

Fig. 5 is a partial three-dimensional exploded view of the embodiment, showing the pen feeding mechanism, a front fixing seat and a knife seat;

Fig. 6 is the three-dimensional exploded view of the pen feeding mechanism of this embodiment;

Figure 7 is a rear perspective view of a seat of this embodiment;

Fig. 8 is a front perspective combined view of a linkage unit and a pen clamping unit of the pen feeding mechanism of this embodiment;

Fig. 9 is a combined rear view of the interlocking unit and the pen holding unit of this embodiment;

Fig. 10 is a three-dimensional exploded view of a front guide seat and a pen clip assembly of this embodiment;

Fig. 11 is a three-dimensional exploded view of the front guide seat and the pen holder assembly at another angle of the embodiment;

Fig. 12 is a partial front combined view of the pen feed mechanism of this embodiment, showing the state before pen feed;

Figure 13 is a side view of Figure 12;

Fig. 14 is a partial front view combination diagram similar to Fig. 12, showing the state after the pen is entered;

FIG. 15 is a side view of FIG. 14 .

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments. Before the present invention is described in detail, it should be noted that the relative position terms used in the following descriptions, for example, "front" and "rear" are based on each figure. The direction shown and the normal use direction are the reference.

Referring to FIG. 2 to FIG. 5 , an embodiment of the pencil sharpener with a pen feeding mechanism of the present invention includes a casing 2 , a pencil sharpening mechanism 3 , a crank handle 4 and a pen feeding mechanism 5 .

The casing 2 includes a front cover 21 and a rear casing (not shown) detachably mounted on the rear side of the front cover 21, and the front cover 21 has a pen feeding hole 211 around an axis I , a protruding ring 212 extending toward the rear end and surrounding the axis I and located on the outer periphery of the pen feeding hole 211 , and three first posting posts 213 extending toward the rear end and located in the protruding ring 212 .

The pencil sharpening mechanism 3 is installed in the casing 2 and includes a front fixing seat 31 , a rear fixing seat 32 , a knife seat 33 , a spiral cutter 34 and a rotating gear 35 .

The front fixing seat 31 is located behind the front cover 21, and has a through hole 311 around the axis I, three second posts 312 extending forward and arranged at equal angles, and three second posts 312 arranged at equal angles. The boss 313.

The rear fixing base 32 is installed and fixed on the rear housing and is spaced from the front fixing base 31 at an appropriate distance, and has an inner gear ring 321 surrounding the axis I. As shown in FIG.

The knife seat 33 extends along the axis I, is installed between the front fixing base 31 and the rear fixing base 32, and has a pen holder 331 inserted into the through hole 311, and a pen holder located away from the pen holder. 331 and pass through the connection end 332 of the rear fixing base 32 .

The spiral cutter 34 is rotatably mounted on the knife seat 33 .

The rotating gear 35 is connected to the helical cutter 34 and meshes with the inner gear ring 321 .

The handle 4 is installed outside the casing 2 , located at the rear side of the rear fixing base 32 and connected to the connecting end 332 of the knife seat 33 .

When the rocking handle 4 is turned, the knife seat 33 can be driven to rotate around the axis I, and at the same time, the rotating gear 35 rotates around the inner toothed ring 321 and rotates itself, that is, the rotating gear 35 rotates around the inner gear ring 321. The inner gear ring 321 revolves and rotates, so that the spiral cutter 34 can also be driven to revolve and rotate so that a pencil (not shown) inserted into the pen container 331 can be sharpened.

3 to 7, the pen feeding mechanism 5 is installed between the front cover 21, the front fixing seat 31 and the knife seat 33, and includes a seat 50, a linkage unit 60, a The pen holding unit 70 , an elastic unit 80 and a rotating unit 90 .

The seat 50 is installed and fixed in the protruding ring 212 in the front cover 21, and has a front face 51, a rear face 52, and an outer peripheral wall connecting the front face 51 and the rear face 52 and surrounding the axis I. 53. An inner peripheral wall 54 connecting the front face 51 and the rear face 52 and forming a through hole 541 around the axis I, three extending from the inner peripheral wall 54 toward the outer peripheral wall 53 and communicating with the front face 51 and the outer peripheral wall 53 The radial guide slots 55 on the rear face 52, the three front inserts 56 corresponding to the first inserts 213 and extending from the front face 51 toward the front end, the three corresponding to the second inserts 312 and extending from the rear 52 extends toward the rear end of the rear insert 57, and six fixed blocks 58 arranged on the rear 52.

The radial guide grooves 55 are equiangularly distributed, and each radial guide groove 55 is roughly T-shaped, and has a wide front and a narrow rear.

The front socket 56 is inserted and combined with the first post 213, so that the seat 50 is fixed in the protruding ring 212 of the front cover 21, and the through hole 541 is aligned along the axis I. Located behind the pen inlet hole 211.

The rear socket 57 is inserted and combined with the second post 312, so that the front fixing seat 31 is positioned behind the front cover 21, and the through hole 311 is located along the axis I in the through hole. hole 541 behind.

Two fixing blocks 58 are located on two sides of a radial guide slot 55 , and each fixing block 58 has a slot 581 opening toward the radial guide slot 55 .

Referring to Fig. 6, Fig. 8 to Fig. 11, the linkage unit 60 has three front guide seats 61 respectively sliding in the radial guide grooves 55, and each front guide seat 61 has a guide seat 61 sliding in the corresponding radial guide slots. The slot 55 is generally a T-shaped sliding block 62 , a first clamping block 63 and a second clamping block 64 .

The slider 62 has a front wide portion 621 , a rear narrow portion 622 , and a concave arc surface 623 disposed on the front wide portion 621 and concave toward the axis I.

The concave arc surface 623 of the front guide seat 61 cooperates to define a front guide hole 65 around the axis I.

The first clamping block 63 is bent outward from a left side 624 of the rear narrow portion 622 toward the axis I, and has a first clamping groove 631 open toward the front wide portion 621 .

The second clamping block 64 is bent outward from a right side 625 of the rear narrow portion 622 toward the axis I, and has a second clamping groove 641 opening toward the axis I.

The pen holder unit 70 has three pen holder assemblies 71 respectively installed on the front guide seat 61, each pen holder assembly 71 has a rotating shaft 72, and a driven gear sleeve connected to the rotating shaft 72 73, a pen holder roller 74.

The rotating shaft 72 is rotatably located in the first clamping groove 631 and the second clamping groove 641 , and is limited in the first clamping groove 631 and the second clamping groove 641 .

The driven gear 73 is located outside the first clamping block 63, the pen clamping roller 74 is located between the first clamping block 63 and the second clamping block 64, and the pen clamping combination The pen-holding roller 74 of the body 71 cooperates to define a pen-holding hole 75 around the axis I and behind the front guide hole 65 .

Referring to FIG. 3 , FIG. 5 to FIG. 7 , the elastic unit 80 has three first elastic members 81 and three second elastic members 82 . Each first elastic member 81 is installed between the corresponding sliding block 62 and the two fixing blocks 58, and is used to impart an elastic force to the front guide seat 61 so that the front guide seat 61 has a constant orientation towards the axis I. Mobile trends. Each second elastic member 82 is mounted on the corresponding slider 62 and the front fixing seat 31, and is used to impart an elastic force to the front guide seat 61 so that the front guide seat 61 can move toward the axis I constantly. the trend of.

The first elastic member 81 in this embodiment is a spring wire, the middle part of which is inserted into the corresponding sliding block 62 , and the two ends are respectively inserted into the slots 581 of the fixing block 58 . The second elastic member 82 is a torsion spring, and its body is sleeved on the protruding post 313 of the front fixing seat 31 , and its two legs are against the slider 62 and the front fixing seat 31 . The present invention can use the first elastic member 81 or the second elastic member 82 alone, or use the first elastic member 81 and the second elastic member 82 at the same time, so that the front guide seat 61 has a good The resetting function, at the same time make the pen clamping roller 74 have a good clamping effect.

Referring to FIG. 5 , FIG. 6 , and FIG. 13 , the rotating unit 90 has a turntable 91 located between the pen holder unit 70 and the front fixing seat 31 , three driving teeth 92 and a connecting assembly 93 .

The turntable 91 has a front disk surface 911, a rear disk surface 912, and an insertion sleeve 913 extending from the rear disk surface 912 toward the rear end for insertion into the through hole 311 of the front fixing seat 31. The insertion sleeve 913 It has an inner cylindrical surface 915 surrounding the axis I and forming a communication hole 914 , and the communication hole 914 communicates with the pen holding hole 75 and the pen container 331 along the axis I. The insertion sleeve 913 is inserted into the through hole 311 , and the pen container 331 is inserted into the insertion sleeve 913 .

The driving teeth 92 are disposed on the front disk surface 911 corresponding to the driven gears 73 , and the driving teeth 92 mesh with the driven gears 73 respectively.

The connection assembly 93 is arranged between the inner cylinder surface 915 of the insert sleeve 913 and the pen holder 331, the connection assembly 93 in this embodiment is a spline, and the present invention uses the connection assembly 93, The pen container 331 is detachably assembled with the turntable 91 , and the pen container 331 can drive the turntable 91 to rotate the rotating unit 90 .

It is worth noting that the connection assembly 93 can also be other equivalent assemblies, for example, a threaded segment is provided between the outer cylinder surface of the pen holder 331 and the inner cylinder surface 915 of the insert sleeve 913 to be screwed together, Or the end of the pen holder 331 is set as a square block, and the inner cylinder surface 915 is correspondingly set as a square surface to form a square hole for the insertion and connection of the pen holder 331, so that the pen holder 331 can drive the The effect of the rotation of the rotation unit 90.

When in use, refer to Fig. 3, Fig. 6, Fig. 12, Fig. 13, when the present invention is in the state before the pen is advanced, the linkage unit 60 and the pen holder unit 70 are close to the axis through the elastic unit 80 I, referring to Fig. 2 to Fig. 5, Fig. 4, Fig. 14, Fig. 15, to cut the pencil, first insert the pencil into the pen inlet hole 211 of the front cover 21, and continue to insert the pencil, the Pencil just can enter in described front guide hole 65, and pushes away described front guide seat 61 to make described front guide seat 61 move toward the direction away from described axis I, and described front guide seat 61 drives described pen holder assembly 71 also Move toward the direction away from the axis I, and then make the hole diameter of the pen holding hole 75 larger. At this time, the first elastic member 81 and the second elastic member 82 are deformed and have a restoring force. When the pencil enters the pen holder hole 75, the pencil can be clamped by the pen holder roller 74, and then the handle 4 is rotated to drive the knife holder 33 to rotate, and the pen holder 331 can be used to drive the pencil. The rotating unit 90 rotates, and at the same time drives the driven gear 73 to rotate through the driving gear 92 , and then rotates the pencil holding roller 74 to push the pencil into the pen container 331 , and then perform the pencil sharpening operation.

When the pencil sharpening operation is finished, only need to reversely rotate the rocker 4, the pen holder roller 74 can be reversely rotated to produce the effect of retracting the pen. When the pencil breaks away from the leading seat 61, the leading The seat 61 can be automatically reset by the elastic unit 80, and is in the state before the pen is inserted again.

It is worth noting that although the present embodiment is described with three radial guide grooves 55, three front guide seats 61, three pen holder assemblies 71, three first elastic members 81, and three second elastic members 82, However, the number of the aforementioned components can be changed according to requirements, for example, two or four.

To sum up, the pen feeding mechanism of the present invention and the pencil sharpener having it have the functions and advantages as described below, so the purpose of the present invention can indeed be achieved.

1. In the present invention, the slider 62 of the front guide seat 61 can move in the corresponding radial guide groove 55, and can drive the pen clip assembly 71 to move accordingly, so that the front guide hole 65 and the clip The aperture of pen hole 75 can be changed, and then can be applicable to the pencil of different pen diameter.

2. In the present invention, the slider 62 of the front guide seat 61 can move in the corresponding radial guide groove 55, and can drive the pen holder assembly 71 to move accordingly. In this way, when the pen is advanced, the pencil First push away the front guide seat 61, and the front guide seat 61 drives the pen clamp assembly 71 to move, so that the aperture of the pen clamp hole 75 first increases in response to the pen diameter of the pencil, and then passes through the pen holder assembly 71 to move. The pencil-holding roller 74 sandwiches the pencil, so that the pencil can be prevented from directly hitting the pencil-holding roller 74 , and the damage rate of the pencil-holding roller 74 can be effectively reduced.

Claims (10)

1. A pen feeding mechanism, suitable for being installed on a pencil sharpener, the pencil sharpener has a casing, a pencil sharpening mechanism installed in the casing and having a knife seat, and is installed outside the casing for The rocker that drives the knife seat of the pen sharpening mechanism to rotate, the casing has a front cover, the front cover has a pen feeding hole around the axis, and the pen feeding mechanism includes a seat, a linkage unit, and a pen clamping unit , an elastic unit and a rotating unit; it is characterized in that: The seat is installed and fixed on the rear side of the front cover, and includes a front face, a rear face, an outer peripheral wall connecting the front face and the rear face and surrounding the axis, connecting the front face and the rear face and surrounding the The axis forms the inner peripheral wall of the through hole, and at least two radial guide grooves extending from the inner peripheral wall toward the outer peripheral wall and communicating the front face and the rear face; The interlocking unit includes at least two front guide seats that are respectively slid in the radial guide grooves, each front guide seat has a slider that slides in the corresponding radial guide groove, and two guide seats from the slider The first clamping block and the second clamping block that are bent and extended toward the axis on the opposite side face outward, the slider has a concave arc surface that is recessed toward the axis, and the concave arc surface of the linkage unit cooperate to define a front guide hole around the axis and behind the pen inlet hole; The pen-holding unit includes at least two pen-holding assemblies respectively installed on the front guide seat, each pen-holding assembly has a rotatably mounted on the first clamping block and the second clamping block. The rotating shaft is sleeved on the driven gear connected to the rotating shaft and located outside the first clamping block, and the driven gear is sleeved on the rotating shaft and located between the first clamping block and the second clamping block The pen-holding roller in between, the pen-holding roller of the pen-holding unit cooperates to define a pen-holding hole around the axis and behind the front guide hole; The elastic unit makes the front guide seat have a constant tendency to move toward the axis; The rotating unit includes a turntable connected to the tool seat and driven by the tool seat, and at least two driving teeth arranged on the front surface of the turntable and meshing with the driven gear respectively. 2. The pen feeding mechanism according to claim 1, characterized in that: the bearing seat includes three radial guide grooves distributed at equal angles, and the linkage unit includes three radial guide grooves that slide respectively in the radial guide grooves. The front guide seat, the pen holder unit includes three pen holder assemblies respectively installed on the front guide seat. 3. The pen feeding mechanism according to claim 1, characterized in that: each radial guide groove of the seat is wide in the front and narrow in the rear, and the slider also has a wide front part and a narrow rear part, so The concave arc surface is arranged on the front wide part, the first clamping block has a first clamping groove, the second clamping block has a second clamping groove, and the rotating shaft is installed and limited in the first clamping groove. A clamping groove is connected with the second clamping groove. 4. The pen feeding mechanism according to claim 1, wherein the elastic unit comprises at least two first elastic members, and the first elastic members are installed between the slider and the seat respectively . 5. The pen-feeding mechanism according to claim 4, characterized in that: the seat further includes several fixed blocks arranged on the rear surface, and two fixed blocks are located in a radial guide groove in pairs The two sides of the first elastic member are spring wires, the middle part of each first elastic member is inserted into the corresponding slider, and the two ends of each first elastic member are respectively inserted into the fixed block. 6. The pen feeding mechanism according to claim 4, characterized in that: the elastic unit further comprises at least two second elastic members, and the second elastic members are installed on the slider and the pencil sharpening mechanism respectively. In between, the leading seat has a constant tendency to move toward the axis. 7. The pen feeding mechanism according to claim 6, characterized in that: the pen sharpening mechanism has a front fixing seat positioned at the rear of the front cover, is installed and fixed on the casing and is spaced from the front fixing seat and a rear fixed seat having an inner gear ring around the axis, the knife seat installed between the front fixed seat and the rear fixed seat and connected to the crank handle, rotatably installed on the knife seat The helical cutter, and the rotary gear connected with the helical cutter and meshed with the inner gear ring, the front fixed seat has at least two protrusions, the second elastic member is a torsion spring, and the first The two elastic parts are respectively sleeved on the protruding post and abutted against the slider and the front fixing seat. 8. The pen feeding mechanism according to claim 1, characterized in that: the pen sharpening mechanism has a front fixing seat positioned at the rear of the front cover, is installed and fixed on the casing and is spaced from the front fixing seat and a rear fixed seat having an inner gear ring around the axis, the knife seat installed between the front fixed seat and the rear fixed seat and connected to the crank handle, rotatably installed on the knife seat The helical cutter, and the rotating gear connected with the helical cutter and meshed with the inner gear ring, the front fixed seat has a perforation around the axis, the turntable has the front disk surface and the rear disk surface, and an inserting sleeve extending from the rear disc surface toward the rear end and inserting into the through hole of the front fixing seat, the inserting sleeve has an inner cylinder surface surrounding the axis and forming a communication hole, and the knife seat has an inner cylinder surface along the axis The pen holder is inserted into the insert, and the rotating unit further includes a connecting assembly arranged between the inner cylinder surface of the turntable and the pen holder. 9. The pen feeding mechanism according to claim 8, characterized in that: the connecting assembly is a keying tooth. 10. A pencil sharpener with a pen feeding mechanism, comprising a casing, a pencil sharpening mechanism, a rocker and a pen feeding mechanism; it is characterized in that: The casing includes a front cover and a rear casing, and the front cover has a pen inlet hole around the axis; The pencil sharpening mechanism is installed in the casing, and includes a front fixing seat located behind the front cover, a rear fixing seat that is fixed on the rear casing and has an inner gear ring around the axis, along the The tool seat extending from the axis and located between the front fixed seat and the rear fixed seat, the spiral cutter rotatably installed on the knife seat, and the spiral cutter connected with the internal teeth Rotary gears meshing with rings; The handle is located outside the rear shell and connected to the knife seat to drive the knife seat to rotate; The pen feeding mechanism is the pen feeding mechanism according to claim 1.

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