Pen feeding mechanism and pencil sharpener having the same

Abstract

A pen feeding mechanism includes a support seat, a linkage unit, a pen clamping unit, an elastic unit and a rotating unit. The support seat includes at least two radial guide grooves; the linkage unit includes at least two front guide seats slidably placed in the radial guide grooves, each front guide seat has a concave arc surface, and the concave arc surface cooperates to define a front guide hole around the axis; the pen clamping unit includes at least two pen clamping assemblies respectively installed on the front guide seats, each pen clamping assembly has a rotating shaft, and a driven gear and a pen clamping roller sleeved and connected to the rotating shaft, and the pen clamping roller cooperates to define a pen clamping hole located behind the front guide hole; the elastic unit enables the front guide seat to have a tendency to move toward the axis constantly; the rotating unit includes a rotating disk, and at least two driving teeth arranged on the rotating disk and meshing with the driven gear. In this way, the present invention can be applied to pencils of different pen diameters and can reduce the damage rate.

Description

Technical Field

[0001] The invention relates to a pencil sharpener, in particular to a pencil feeding mechanism and a pencil sharpener having the same. Background Art

[0002] See also Figure 1 The pen feed bracket 1 disclosed in the Chinese utility model patent authorization announcement number 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 feed hole, and has a bracket 12, a tool holder fixing seat 13 installed at the center of the bracket 12, and a rotating disk 14 installed on the tool holder fixing seat 13. The bracket 12 is provided with four bracket legs 121, and the bracket legs 121 are arranged in pairs. The rotating disk 14 has a disc gear 141. The rotating device 15 includes two parallel rotating rods 151, two rubber rings 152 and two rotating gears 153. The two ends of each rotating rod 151 are respectively installed on the corresponding two bracket legs 121, and each rotating rod 151 is sleeved and connected with a rubber ring 152 and a rotating gear 153, and the rotating gear 153 is meshed with the disc gear 141 of the rotating disk 14. The front end of the clamping device 16 is installed at 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 structure 161 with left and right ends opened at the middle position of the upper part of the rotating device 15.

[0003] When in use, insert the pencil into the semi-open circular structure 161 formed by the clamping device 16, and insert the pencil until it extends outside the pen inlet of the bracket assembly 11 and enters the pencil sharpener for sharpening. When the rotating disc 14 is driven to rotate, the rotating gear 153 and the rubber ring 152 can be driven to rotate through the disc gear 141, thereby achieving the effect of feeding or retracting the pencil. When the pencil is separated from the rubber ring 152, the clamping device 16 continues to clamp the pencil, which can effectively prevent the pencil from falling. Although the pen feeding bracket 1 has the above-mentioned use functions, it has the following problems:

[0004] First, because the clamping device 16 and the rotating device 15 cannot move, the pen feeding bracket 1 can only be used for pencils of one diameter, and cannot be used for pencils of different diameters.

[0005] Second, when the pencil is inserted, the rubber ring 152 is easily damaged because the pencil directly hits the rubber ring 152 . Summary of the invention

[0006] The invention aims to provide a pencil feeding mechanism which is applicable to pencils with different pen diameters and can reduce the damage rate.

[0007] Another object of the present invention is to provide a pencil sharpener with a pen feeding mechanism which is applicable to pencils of different diameters and can reduce the damage rate.

[0008] The pen feeding mechanism of the present invention is suitable for being installed in a pencil sharpener, the pencil sharpener comprises a housing, a pen sharpening mechanism installed in the housing and having a knife seat, and a crank handle installed outside the housing for driving the knife seat of the pen sharpening mechanism to rotate, the housing comprises a front cover, the front cover has a pen feeding hole around an axis, the pen feeding mechanism comprises a bearing seat, a linkage unit, a pen clamping unit, an elastic unit and a rotating unit; the characteristics are:

[0009] The support seat is mounted 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, an inner peripheral wall connecting the front face and the rear face and forming a through hole around the axis, and at least two radial guide grooves extending from the inner peripheral wall toward the outer peripheral wall and connecting the front face and the rear face;

[0010] The linkage unit comprises at least two front guide seats respectively slidably placed in the radial guide grooves, each front guide seat has a slider slidably placed in the corresponding radial guide groove, and a first clamping block and a second clamping block extending outwardly from two opposite sides of the slider and then bent toward the axis, the slider has a concave arc surface concavely placed toward the axis, and the concave arc surface of the linkage unit cooperates to define a front guide hole surrounding the axis and located behind the pen inlet hole;

[0011] The pen clamping unit comprises at least two pen clamping assemblies respectively mounted on the front guide seat, each pen clamping assembly comprises a rotating shaft rotatably mounted on the first clamping block and the second clamping block, a driven gear sleeved and connected to the rotating shaft and located outside the first clamping block, and a pen clamping roller sleeved and connected to the rotating shaft and located between the first clamping block and the second clamping block, the pen clamping rollers of the pen clamping unit cooperate to define a pen clamping hole surrounding the axis and located behind the front guide hole;

[0012] The elastic unit enables the front guide seat to have a tendency to constantly move toward the axis;

[0013] The rotating unit comprises a rotating disk connected to the knife seat and driven by the knife seat, and at least two driving teeth arranged on the front disk surface of the rotating disk and respectively meshing with the driven gear.

[0014] In the pen feeding mechanism of the present invention, the support seat includes three radial guide grooves distributed at equal angles, the linkage unit includes three front guide seats respectively slidably placed in the radial guide grooves, and the pen clamping unit includes three pen clamping assemblies respectively installed on the front guide seats.

[0015] In the pen-feeding mechanism described in the present invention, each radial guide groove of the seat is of a structure that is wide at the front and narrow at the rear, the sliding block also has a wide front portion and a narrow rear portion, the concave arc surface is arranged on the wide front portion, 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 and the second clamping groove.

[0016] In the pen-feeding mechanism of the present invention, the elastic unit comprises at least two first elastic members, and the first elastic members are respectively installed between the slider and the support seat.

[0017] The pen-feeding mechanism described in the present invention, the support seat also includes a plurality of fixed blocks arranged at the rear, the fixed blocks are located on both sides of a radial guide groove in a pair of two, the first elastic member is a spring wire, the middle portion of each first elastic member is passed through the corresponding sliding block, and the two end portions are respectively inserted into the fixed blocks.

[0018] In the pen-feeding mechanism of the present invention, the elastic unit further comprises at least two second elastic members, and the second elastic members are respectively installed between the slider and the pencil sharpening mechanism, so that the front guide seat has a tendency to constantly move toward the axis.

[0019] The pen-feeding mechanism of the present invention comprises a front fixing seat located behind the front cover, a rear fixing seat fixed to the housing and spaced apart from the front fixing seat and having an inner tooth ring surrounding the axis, a knife seat installed between the front fixing seat and the rear fixing seat and connected to the crank handle, a spiral knife rotatably installed on the knife seat, and a rotating gear connected to the spiral knife and meshing with the inner tooth ring, the front fixing seat having at least two bosses, the second elastic member being a torsion spring, the second elastic member being respectively sleeved on the bosses and abutting against the slider and the front fixing seat.

[0020] The pen feeding mechanism described in the present invention comprises a front fixed seat located behind the front cover, a rear fixed seat installed and fixed to the casing and spaced from the front fixed seat and having an internal gear ring surrounding the axis, the knife seat installed between the front fixed seat and the rear fixed seat and connected to the crank handle, a spiral sharpening knife rotatably installed on the knife seat, and a rotating gear connected to the spiral sharpening knife and meshing with the internal gear ring, the front fixed seat having a through hole surrounding the axis, the turntable having the front disk surface, the rear disk surface, and an insert tube extending from the rear disk surface toward the rear end and inserted into the through hole of the front fixed seat, the insert tube having an inner cylinder surface surrounding the axis and forming a connecting hole, the knife seat having a pen holder inserted into the insert tube along the axis, and the rotating unit also comprising a connecting assembly arranged between the inner cylinder surface of the turntable and the pen holder.

[0021] In the pen feeding mechanism of the present invention, the connecting assembly is bolt groove teeth.

[0022] The present invention discloses a pencil sharpener with a pen feeding mechanism, comprising a housing, a pencil sharpening mechanism, a crank handle and a pen feeding mechanism; the characteristics are:

[0023] The housing comprises a front cover and a rear housing, wherein the front cover has a pen-feeding hole surrounding an axis;

[0024] The pencil sharpening mechanism is installed in the housing and includes a front fixing seat located behind the front cover, a rear fixing seat fixed to the rear housing and having an inner tooth ring surrounding the axis, a knife seat extending along the axis and located between the front fixing seat and the rear fixing seat, a spiral sharpening knife rotatably installed on the knife seat, and a rotating gear connected to the spiral sharpening knife and meshing with the inner tooth ring;

[0025] The crank handle is located outside the rear housing and connected to the knife seat to drive the knife seat to rotate;

[0026] The pen feeding mechanism is the above-mentioned pen feeding mechanism.

[0027] The beneficial effects of the present invention are as follows: the slider of the front guide seat can move in the corresponding radial guide groove and drive the pen clamp assembly to move, so that the apertures of the front guide hole and the pen clamp hole can be changed, thereby being suitable for pencils of different diameters, and preventing the pencil from directly hitting the pen clamp roller, thereby reducing the damage rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a three-dimensional combination diagram of the pen feeder bracket disclosed in the Chinese utility model patent authorization announcement number CN206242767U;

[0029] Figure 2 It is a front perspective combined diagram of an embodiment of the pen feeding mechanism and the pencil sharpener having the same of the present invention;

[0030] Figure 3 is a rear-view stereoscopic composite diagram of the embodiment;

[0031] Figure 4 is a partial exploded perspective view of the embodiment, showing a front cover, a pen sharpening mechanism and a pen feeding mechanism;

[0032] Figure 5 is a partial three-dimensional exploded view of the embodiment, showing the pen feeding mechanism, a front fixing seat and a knife seat;

[0033] Figure 6 is a three-dimensional exploded view of the pen feeding mechanism of this embodiment;

[0034] Figure 7is a rear perspective view of a socket of the embodiment;

[0035] Figure 8 is a front perspective combined view of a linkage unit and a pen clamping unit of the pen feeding mechanism of the embodiment;

[0036] Fig. 9 is a rear view of the linkage unit and the pen clamping unit of the embodiment;

[0037] Fig.10 is a three-dimensional exploded view of a front guide seat and a pen holder assembly of the embodiment;

[0038] Fig.11 is a three-dimensional exploded view of the front guide seat and the pen holder assembly of the embodiment from another angle;

[0039] Fig.12 is a partial front view of the pen feeding mechanism of the embodiment, showing the state before the pen is fed;

[0040] Fig.13 yes Fig.12 Side view of

[0041] Fig.14 is similar Fig.12 The partial front view composite diagram shows the state after the pen is entered;

[0042] Fig.15 yes Fig.14 Side view of. DETAILED DESCRIPTION

[0043] The present invention is 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 description, for example, "front" and "rear", are based on the orientation shown in the figures and the normal use orientation.

[0044] See also Figures 2 to 5 The embodiment of the pencil sharpener with a pen feeding mechanism of the present invention comprises a housing 2, a pencil sharpening mechanism 3, a crank handle 4 and a pen feeding mechanism 5.

[0045] The housing 2 includes a front cover 21 and a rear shell (not shown) detachably mounted on the rear side of the front cover 21. The front cover 21 has a pen inlet hole 211 surrounding an axis I, a convex ring 212 extending toward the rear end and surrounding the axis I and located on the outer periphery of the pen inlet hole 211, and three first pins 213 extending toward the rear end and located in the convex ring 212.

[0046] The pencil sharpening mechanism 3 is installed in the housing 2 , and includes a front fixing seat 31 , a rear fixing seat 32 , a knife seat 33 , a spiral sharpening knife 34 and a rotating gear 35 .

[0047] The front fixing seat 31 is located behind the front cover 21 and has a through hole 311 surrounding the axis I, three second plug posts 312 extending forward and arranged at equal angles, and three protruding posts 313 arranged at equal angles.

[0048] The rear fixing seat 32 is fixedly mounted on the rear housing and is spaced apart from the front fixing seat 31 by an appropriate distance, and has an inner gear ring 321 surrounding the axis I.

[0049] The knife seat 33 extends along the axis I, is installed between the front fixing seat 31 and the rear fixing seat 32, and has a pen holder 331 inserted into the through hole 311, and a connecting end 332 located on a side away from the pen holder 331 and passing through the rear fixing seat 32.

[0050] The spiral cutting tool 34 is rotatably mounted on the tool holder 33 .

[0051] The rotating gear 35 is connected to the spiral cutter 34 and meshes with the inner gear ring 321 .

[0052] The crank handle 4 is installed outside the housing 2 , located at the rear side of the rear fixing seat 32 and connected to the connecting end 332 of the knife seat 33 .

[0053] When the crank handle 4 is rotated, 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 gear ring 321 and rotates itself, that is, the rotating gear 35 revolves and rotates around the inner gear ring 321, so that the spiral sharpener 34 can also be driven to revolve and rotate, so as to sharpen a pencil (not shown) inserted into the pencil holder 331.

[0054] See also Figures 3 to 7 The pen feeding mechanism 5 is installed between the front cover 21 and the front fixing seat 31 and the knife seat 33, and includes a support seat 50, a linkage unit 60, a pen clamping unit 70, an elastic unit 80 and a rotating unit 90.

[0055] The support seat 50 is installed and fixed in the convex ring 212 in the front cover 21, and has a front face 51, a rear face 52, an outer peripheral wall 53 connecting the front face 51 and the rear face 52 and surrounding the axis I, 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 radial guide grooves 55 extending from the inner peripheral wall 54 toward the outer peripheral wall 53 and connecting the front face 51 and the rear face 52, three front plug cylinders 56 corresponding to the first plug column 213 and extending from the front face 51 toward the front end, three rear plug cylinders 57 corresponding to the second plug column 312 and extending from the rear face 52 toward the rear end, and six fixing blocks 58 arranged on the rear face 52.

[0056] The radial guide grooves 55 are distributed at equal angles. Each radial guide groove 55 is roughly T-shaped and has a structure that is wide at the front and narrow at the back.

[0057] The front insert tube 56 is inserted and combined with the first insert column 213 so that the support seat 50 is fixed in the convex ring 212 of the front cover 21, and the through hole 541 is located behind the pen inlet hole 211 along the axis I.

[0058] The rear insert tube 57 is inserted and combined with the second insert column 312 so that the front fixing seat 31 is positioned behind the front cover 21 and the through hole 311 is located behind the through hole 541 along the axis I.

[0059] The fixing blocks 58 are located at two sides of a radial guide slot 55 in a pair, and each fixing block 58 has a slot 581 open toward the radial guide slot 55 .

[0060] See also Figure 6 , Figures 8 to 11 The linkage unit 60 has three front guide seats 61 respectively slidably placed in the radial guide grooves 55, and each front guide seat 61 has a T-shaped slider 62 slidably placed in the corresponding radial guide groove 55, a first clamping block 63 and a second clamping block 64.

[0061] 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.

[0062] The concave arc surface 623 of the front guide seat 61 cooperates to define a front guide hole 65 around the axis I.

[0063] The first clamping block 63 is bent and extended outward from a left side surface 624 of the rear narrow portion 622 and then toward the axis I, and has a first clamping groove 631 open toward the front wide portion 621 .

[0064] The second clamping block 64 is bent and extended outward from a right side surface 625 of the rear narrow portion 622 and then toward the axis I, and has a second clamping groove 641 open toward the axis I.

[0065] The pen clamp unit 70 has three pen clamp assemblies 71 respectively mounted on the front guide seat 61 . Each pen clamp assembly 71 has a rotating shaft 72 , a driven gear 73 sleeved and connected to the rotating shaft 72 , and a pen clamp roller 74 .

[0066] 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 .

[0067] 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 roller 74 of the pen clamping assembly 71 cooperates to define a pen clamping hole 75 surrounding the axis I and located behind the front guide hole 65 .

[0068] See also Figure 3 , Figures 5 to 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 slider 62 and the two fixing blocks 58, and is used to apply an elastic force to the front guide seat 61 so that the front guide seat 61 has a tendency to move toward the axis I. Each second elastic member 82 is installed between the corresponding slider 62 and the front fixing seat 31, and is used to apply an elastic force to the front guide seat 61 so that the front guide seat 61 has a tendency to move toward the axis I.

[0069] In this embodiment, the first elastic member 81 is a spring wire, the middle portion of which is inserted into the corresponding slider 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, the body of which is sleeved on the convex column 313 of the front fixing seat 31, and the two end legs abut 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 can 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 reset function, and the pen clamping roller 74 has a good clamping effect.

[0070] See also Figure 5 , Figure 6 , Fig.13 The rotating unit 90 has a rotating disk 91 located between the pen clamping unit 70 and the front fixing seat 31 , three driving teeth 92 and a connecting assembly 93 .

[0071] The rotating disk 91 has a front disk surface 911, a rear disk surface 912, and an inserting tube 913 extending from the rear disk surface 912 toward the rear end for inserting into the through hole 311 of the front fixing seat 31. The inserting tube 913 has an inner cylinder surface 915 surrounding the axis I and forming a connecting hole 914. The connecting hole 914 connects the pen clamping hole 75 and the pen barrel 331 along the axis I. The inserting tube 913 is inserted into the through hole 311, and the pen barrel 331 is inserted into the inserting tube 913.

[0072] The driving teeth 92 are disposed on the front disk surface 911 corresponding to the driven gears 73 , and the driving teeth 92 are meshed with the driven gears 73 , respectively.

[0073] The connecting assembly 93 is arranged between the inner tube surface 915 of the insert tube 913 and the pen holder 331. The connecting assembly 93 in this embodiment is a bolt groove tooth. Through the connecting assembly 93, the present invention enables the pen holder 331 and the turntable 91 to be detachably assembled, and the pen holder 331 can drive the turntable 91 to rotate the rotating unit 90.

[0074] It is worth mentioning that the connecting assembly 93 may also be other equivalent assemblies, for example, a threaded section is arranged between the outer cylinder surface of the pen barrel 331 and the inner cylinder surface 915 of the inserting tube 913 to be screwed together, or the end of the pen barrel 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 pen barrel 331 to be inserted and connected, which can also achieve the effect that the pen barrel 331 drives the rotating unit 90 to rotate.

[0075] When using, refer to Figure 3 , Figure 6 , Fig.12 , Fig.13 When the present invention is in the state before the pen is inserted, the linkage unit 60 and the pen clamp unit 70 are close to the axis I through the elastic unit 80, see Figures 2 to 5 , Figure 4 , Fig.14 , Fig.15To cut the pencil, first insert the pencil into the pen-entry hole 211 of the front cover 21. Continue to insert the pencil so that the pencil can enter the front guide hole 65 and push the front guide seat 61 to move the front guide seat 61 in a direction away from the axis I. The front guide seat 61 drives the pencil clamp assembly 71 to move in a direction away from the axis I, thereby increasing the aperture of the pencil clamp hole 75. At this time, the first elastic member 81 and the second elastic member 82 are deformed and have a restoring elastic force. When the pencil enters the pencil clamp hole 75, the pencil can be clamped by the pencil clamp roller 74. Then, the crank handle 4 is rotated to drive the knife seat 33 to rotate, and the rotating unit 90 can be driven to rotate through the pen holder 331. At the same time, the driven gear 73 is driven to rotate through the driving tooth 92, thereby causing the pencil clamp roller 74 to rotate and push the pencil into the pen holder 331, and then the pencil is sharpened.

[0076] When the pencil sharpening operation is completed, the crank handle 4 can be rotated in the opposite direction to cause the pencil clamping roller 74 to rotate in the opposite direction to produce a pencil retracting effect. When the pencil is separated from the front guide seat 61, the front guide seat 61 can be automatically reset by the elastic unit 80 and be in the state before the pencil is retracted.

[0077] It is worth noting that although the present embodiment is illustrated with three radial guide grooves 55, three front guide seats 61, three pen clamp assemblies 71, three first elastic members 81, and three second elastic members 82, the number of the aforementioned elements can be changed according to needs, for example, it can be two or four.

[0078] In summary, the pen feeding mechanism of the present invention and the pencil sharpener having the same have the following effects and advantages, and thus can truly achieve the purpose of the present invention.

[0079] 1. The present invention enables the slider 62 of the front guide seat 61 to move in the corresponding radial guide groove 55 and drive the pen clamp assembly 71 to move accordingly, so that the apertures of the front guide hole 65 and the pen clamp hole 75 can be changed, thereby being suitable for pencils of different pen diameters.

[0080] Second, the present invention allows the slider 62 of the front guide seat 61 to move in the corresponding radial guide groove 55, and can drive the pen clamp assembly 71 to move accordingly. In this way, when the pencil is inserted, the front guide seat 61 is first pushed away, and the front guide seat 61 drives the pen clamp assembly 71 to move, so that the diameter of the pen clamp hole 75 is first enlarged in response to the diameter of the pencil, and then the pencil is clamped by the pen clamp roller 74. In this way, the pencil can be prevented from directly hitting the pen clamp roller 74, and the damage rate of the pen clamp roller 74 can be effectively reduced.

Claims

1. A pen feeding mechanism, suitable for being installed in a pencil sharpener, the pencil sharpener comprising a housing, a pen sharpening mechanism installed in the housing and having a knife seat, and a crank handle installed outside the housing for driving the knife seat of the pen sharpening mechanism to rotate, the housing comprising a front cover, the front cover having a pen feeding hole around an axis, the pen feeding mechanism comprising a bearing seat, a linkage unit, a pen clamping unit, an elastic unit and a rotating unit; characterized in that: The support seat is mounted 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, an inner peripheral wall connecting the front face and the rear face and forming a through hole around the axis, and at least two radial guide grooves extending from the inner peripheral wall toward the outer peripheral wall and connecting the front face and the rear face; The linkage unit comprises at least two front guide seats respectively slidably placed in the radial guide grooves, each front guide seat has a slider slidably placed in the corresponding radial guide groove, and a first clamping block and a second clamping block extending outwardly from two opposite sides of the slider and then bent toward the axis, the slider has a concave arc surface concavely placed toward the axis, and the concave arc surface of the linkage unit cooperates to define a front guide hole surrounding the axis and located behind the pen inlet hole; The pen clamping unit comprises at least two pen clamping assemblies respectively mounted on the front guide seat, each pen clamping assembly comprises a rotating shaft rotatably mounted on the first clamping block and the second clamping block, a driven gear sleeved and connected to the rotating shaft and located outside the first clamping block, and a pen clamping roller sleeved and connected to the rotating shaft and located between the first clamping block and the second clamping block, the pen clamping rollers of the pen clamping unit cooperate to define a pen clamping hole surrounding the axis and located behind the front guide hole; The elastic unit enables the front guide seat to have a tendency to constantly move toward the axis; The rotating unit comprises a rotating disk connected to the knife seat and driven by the knife seat, and at least two driving teeth arranged on the front disk surface of the rotating disk and respectively meshing with the driven gear.

2. The pen feeding mechanism according to claim 1, characterized in that: The support seat comprises three radial guide grooves distributed at equal angles, the linkage unit comprises three front guide seats respectively slidably disposed in the radial guide grooves, and the pen clamping unit comprises three pen clamping assemblies respectively mounted on the front guide seats.

3. The pen feeding mechanism according to claim 1, characterized in that: Each radial guide groove of the seat is wide at the front and narrow at the rear. The slider also has a wide front portion and a narrow rear portion. The concave arc surface is arranged on the wide front portion. The first clamping block has a first clamping groove, and the second clamping block has a second clamping groove. The rotating shaft is installed and limited in the first clamping groove and the second clamping groove.

4. The pen feeding mechanism according to claim 1, characterized in that: The elastic unit includes at least two first elastic members, and the first elastic members are respectively installed between the slider and the support seat.

5. The pen feeding mechanism according to claim 4, characterized in that: The support seat also includes a plurality of fixed blocks arranged at the rear, and the fixed blocks are located on both sides of a radial guide groove in pairs of two. The first elastic member is a spring wire, and the middle part of each first elastic member is inserted into the corresponding slider, and the two ends are respectively inserted into the fixed blocks.

6. The pen feeding mechanism according to claim 4, characterized in that: The elastic unit further comprises at least two second elastic members, which are respectively installed between the slider and the pencil sharpening mechanism, so that the front guide seat has a tendency to constantly move toward the axis.

7. The pen feeding mechanism according to claim 6, characterized in that: The pencil sharpening mechanism comprises a front fixing seat located behind the front cover, a rear fixing seat fixed to the housing and spaced apart from the front fixing seat and having an inner tooth ring surrounding the axis, the knife seat installed between the front fixing seat and the rear fixing seat and connected to the crank handle, a spiral sharpening knife rotatably mounted on the knife seat, and a rotating gear connected to the spiral sharpening knife and meshing with the inner tooth ring, the front fixing seat has at least two bosses, the second elastic member is a torsion spring, the second elastic member is respectively sleeved on the bosses and abuts against the slider and the front fixing seat.

8. The pen feeding mechanism according to claim 1, characterized in that: The pencil sharpening mechanism comprises a front fixed seat located behind the front cover, a rear fixed seat installed and fixed to the casing and spaced from the front fixed seat and having an internal gear ring surrounding the axis, the knife seat installed between the front fixed seat and the rear fixed seat and connected to the crank handle, a spiral sharpening knife rotatably mounted on the knife seat, and a rotating gear connected to the spiral sharpening knife and meshing with the internal gear ring, the front fixed seat having a through hole surrounding the axis, the turntable having the front disk surface, the rear disk surface, and an insert tube extending from the rear disk surface toward the rear end and inserted into the through hole of the front fixed seat, the insert tube having an inner cylinder surface surrounding the axis and forming a connecting hole, the knife seat having a pen holder inserted into the insert tube along the axis, and the rotating unit also comprising 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 connection assembly is a bolt groove tooth.

10. A pencil sharpener with a pen feeding mechanism, comprising a housing, a pencil sharpening mechanism, a crank handle and a pen feeding mechanism; characterized in that: The housing comprises a front cover and a rear housing, wherein the front cover has a pen-feeding hole surrounding an axis; The pencil sharpening mechanism is installed in the housing and includes a front fixing seat located behind the front cover, a rear fixing seat fixed to the rear housing and having an inner tooth ring surrounding the axis, a knife seat extending along the axis and located between the front fixing seat and the rear fixing seat, a spiral sharpening knife rotatably installed on the knife seat, and a rotating gear connected to the spiral sharpening knife and meshing with the inner tooth ring; The crank handle is located outside the rear housing 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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