CN220995974U - Nib thickness adjustment mechanism and automatic pencil sharpener - Google Patents

Abstract

The utility model provides a nib thickness adjustment mechanism, includes push rod assembly and sets up the gear adjustment subassembly in push rod assembly below, the vertical activity of push rod assembly sets up, and the top can offset with the nib of the pencil in the mechanism of cutting, gear adjustment subassembly includes dwang and adjust knob, the dwang transversely sets up, adjust knob sets up the one end at the dwang and both synchronous revolution, gear adjustment subassembly is still including setting up the cam at the other end of dwang, cam and dwang synchronous revolution just set up under push rod assembly's bottom, the outer fringe of cam is equipped with a plurality of driving surfaces for make different driving surfaces offset with push rod assembly's bottom when the cam rotates to different positions, a plurality of distance between driving surface and the rotation center of cam is different. The nib thickness adjusting mechanism is simple in structure and low in processing difficulty. In addition, an automatic pencil sharpener is also provided.

Description

Nib thickness adjustment mechanism and automatic pencil sharpener

Technical Field

The utility model relates to the technical field of stationery, in particular to a nib thickness adjusting mechanism and an automatic pencil sharpener.

Background

Automatic pencil sharpening machines generally include a housing, and a pencil feeding mechanism and a pencil sharpening mechanism disposed within the housing. When sharpening, the pencil passes through the pencil feeding mechanism and enters the pencil sharpening mechanism, and the pencil is clamped by the pencil feeding mechanism after the pencil is fed into place; then the pencil sharpening mechanism cuts the pencil point; after the pencil sharpening is completed, the pencil feeding mechanism can also withdraw the pencil from the pencil sharpener. In order to meet the requirements of users on different nib thicknesses, an automatic pencil sharpener with adjustable nib thickness is currently provided.

For example, the Chinese patent publication No. CN 215096678U discloses an automatic pencil sharpener with adjustable pencil point thickness, which is shown in figure 1 and comprises a shell 1a, a pencil sharpening mechanism and a pencil point thickness adjusting mechanism 5a arranged in the shell 1 a. The pencil sharpening mechanism comprises a cutter frame assembly 2a, wherein the cutter frame assembly 2a comprises a cutter frame assembly mounting shell 3a, a pencil inlet channel 4a and a hob, the pencil inlet channel 4a is used for placing a pencil point of a pencil, and the hob is used for cutting the pencil point of the pencil in the pencil inlet channel 4a, and the hob is arranged in the cutter frame assembly mounting shell 3 a. The pen point thickness adjusting mechanism 5a comprises a push rod assembly, a gear adjusting assembly and a positioning assembly 13a, wherein the push rod assembly comprises a pen blocking block 6a and a push rod 7a, the gear adjusting assembly is arranged below the push rod assembly and comprises a movable piece 8a and a rotating rod 9a, the pen blocking block 6a is arranged below a pen inlet channel 4a and used for propping against a pen point of a pencil, the push rod 7a is vertically movably arranged, the moving direction of the push rod 7a is consistent with that of the pen inlet channel 4a, the movable piece 8a is arranged below the push rod 7a, a sliding groove used for guiding the up-and-down movement of the movable piece 8a is arranged in the shell 1a, one end of the push rod 7a props against the pen blocking block 6a, the other end of the push rod is propped against the movable piece 8a, the rotating rod 9a is transversely arranged at one end of the push rod is provided with an adjusting knob 10a, the other end of the push rod is connected with the movable piece 8a through a convex rib 11a and a slide way 12a, the convex rib 11a is annular and is arranged deviating from the central axis of the rotating rod 9a, and the positioning assembly 13a is used for limiting the gear adjusting assembly at a corresponding gear position.

The working principle of the nib thickness adjusting mechanism 5a of the conventional automatic pencil sharpener is as follows: the adjusting knob 10a is rotated, the rotating rod 9a rotates along with the adjusting knob 10a, all positions of the convex ribs 11a always slide in the slideway 12a, and as the convex ribs 11a are eccentrically arranged, the slideway 12a is driven to move upwards or downwards in the rotating process of the convex ribs 11a, so that the movable piece 8a provided with the slideway 12a moves up and down, then the push rod 7a and the pen blocking block 6a are pushed to move up and down, and when the adjusting knob 10a rotates to a proper gear to be released, the positioning assembly 13a completes the limiting of the corresponding gear, and the regulation of the thick and thin gears of the pen point is completed.

However, the conventional nib thickness adjusting mechanism 5a of the automatic pencil sharpener has the following technical problems: the eccentric convex rib 11a and the slide way 12a are matched to convert the rotary motion of the adjusting knob 10a into the up-and-down motion of the movable piece 8a, so that the structure of the convex rib 11a and the slide way 12a is complex, and the up-and-down guiding structure of the movable piece 8a is matched, so that the complexity of the structure is further increased; in addition, only under the condition that the size matching of the convex rib 11a and the slideway 12a is good, the movable piece 8a can reliably move up and down, so that the requirement on the size matching precision of the convex rib 11a and the slideway 12a is higher, and the processing difficulty is increased.

Disclosure of utility model

The utility model aims to solve the technical problems that: the nib thickness adjusting mechanism is simple in structure and low in processing difficulty.

The technical scheme of the utility model is as follows: the utility model provides a nib thickness adjustment mechanism, includes push rod assembly and sets up the gear adjustment subassembly in push rod assembly below, the vertical activity of push rod assembly sets up, and the top can offset with the nib of the pencil in the mechanism of cutting, gear adjustment subassembly includes dwang and adjust knob, the dwang transversely sets up, adjust knob sets up the one end at the dwang and both synchronous revolution, gear adjustment subassembly is still including setting up the cam at the other end of dwang, cam and dwang synchronous revolution just set up under push rod assembly's bottom, the outer fringe of cam is equipped with a plurality of driving surfaces for make different driving surfaces offset with push rod assembly's bottom when the cam rotates to different positions, a plurality of distance between driving surface and the rotation center of cam is different.

The working principle of the nib thickness adjusting mechanism of the utility model is as follows:

Rotating the adjusting knob, and driving the cam to rotate by the rotating rod along with the rotation of the adjusting knob; the adjusting knob rotates to the corresponding gear, and the cam also rotates to the driving surface corresponding to the corresponding gear to be propped against the bottom end of the push rod assembly; because the distances between different driving surfaces and the rotation center of the cam are not equal, the height difference exists between the different driving surfaces and the bottom end of the push rod assembly, so that the push rod assembly can be moved up and down, and the aim of adjusting the thickness of the pen point is fulfilled.

After the structure is adopted, the utility model has the following advantages:

According to the nib thickness adjusting mechanism, only one cam capable of rotating along with the rotating rod is required to be arranged, and the plurality of driving surfaces with different distances from the rotating center are arranged on the outer edge of the cam, so that the vertical movement of the push rod assembly can be realized by utilizing the height difference existing when different driving surfaces are propped against the push rod assembly, the required parts are few in whole, and the structure is very simple; in addition, only one part of the cam is needed, the rotary motion can be converted into the up-down linear motion, and the matching of other parts is not needed in the middle, so that the dimensional matching precision between accessories is not needed to be considered too much, and the processing of the driving surface is easy, so that the processing difficulty is also greatly reduced.

Preferably, the rotating rod is provided with a positioning component which is positioned between the adjusting knob and the cam, the positioning component comprises a positioning fluted disc and a clamping piece, the positioning fluted disc is arranged on the rotating rod and synchronously rotates with the rotating rod, a plurality of tooth parts are arranged on the outer edge of the positioning fluted disc, the number of the tooth parts is equal to that of the driving surfaces, and the clamping piece is arranged on one side of the positioning fluted disc and meshed with the tooth parts of the positioning fluted disc and used for switching different driving surfaces to be propped against the bottom end of the push rod component when the clamping piece is positioned to different tooth parts. The positioning component has simple structure and reliable positioning.

Preferably, the clamping piece is a marble or a limiting rib. The clamping piece adopts the marble, and card income and separation are all comparatively easy, and the clamping piece adopts spacing muscle, has simplified positioning component's structure, convenient processing.

Preferably, the tooth part of the positioning fluted disc is C-shaped or V-shaped. The tooth part has simple structure, is easy to process, and can be reliably matched with the marble or the limiting rib.

The utility model aims to solve the other technical problems that: the automatic pencil sharpener is simple in structure and low in processing difficulty.

The other technical solution of the utility model is as follows: the utility model provides an automatic pencil sharpener, includes the shell and sets up the pencil sharpening mechanism in the shell, pencil sharpening mechanism includes the knife rest subassembly, the knife rest subassembly is including advancing a passageway and setting up the hobbing cutter in advance a passageway one side, advance the nib that the passageway is used for supplying the pencil and arrange in wherein, the hobbing cutter is used for cutting the nib of advancing the pencil in the passageway, still include above-mentioned nib thickness adjustment mechanism, nib thickness adjustment mechanism sets up in the shell and is located the below of knife rest subassembly, the top of the push rod subassembly of nib thickness adjustment mechanism can offset with the nib of advancing the pencil in the passageway.

After the structure is adopted, the utility model has the following advantages:

The automatic pencil sharpener of the utility model has the advantages that the pencil point thickness adjusting mechanism is arranged, so that the whole pencil sharpener has few required parts and very simple structure; and the whole structure does not need to consider the dimensional matching precision among accessories too much, and the processing of the driving surface is very easy, so the processing difficulty is also greatly reduced.

Preferably, a first partition plate is further arranged in the shell and between the tool rest assembly and the nib thickness adjusting mechanism, a first supporting seat is arranged on one side, close to the nib thickness adjusting mechanism, of the first partition plate, the adjusting knob is rotatably mounted on the shell, one end, far away from the adjusting knob, of the rotating rod is rotatably mounted on the first supporting seat, and the cam is located between the first supporting seat and the shell. The shell and the first supporting seat are utilized to support the two ends of the rotating rod, so that the rotating rod is fixed more firmly and rotates more stably.

Preferably, the first partition board is further provided with a second supporting seat, and the clamping piece is arranged on the second supporting seat. This setting makes things convenient for the installation of joint spare.

Preferably, the cutter rest assembly further comprises a cutter rest assembly mounting shell, the cutter rest assembly mounting shell is arranged in the shell, a first mounting space is formed in the cutter rest assembly mounting shell, the pen inlet channel and the hob are arranged in the first mounting space, a part of side wall of the cutter rest assembly mounting shell is outwards protruded to form a protruding part, the protruding part vertically extends to form a second mounting space communicated with the first mounting space, a detachable second partition plate is arranged at the communication position of the first mounting space and the second mounting space, and the second partition plate and the second mounting space form a starting switch mounting shell for mounting a starting switch. An independent starting switch mounting shell is formed in the tool rest assembly mounting shell, so that the integrity of the external structure of the tool rest assembly mounting shell can be ensured, and scraps generated by cutting of the tool rest assembly can be prevented from entering the starting switch mounting shell, and the safe and reliable use of the starting switch can be ensured; in addition, as the internal space of the starting switch installation shell is smaller, the second detachable partition plate is arranged, and the second partition plate can be detached firstly when the starting switch is installed, so that the installation space is enlarged, and the starting switch is assembled again after the starting switch is installed, so that more reliable use is ensured.

Preferably, the pen feeding mechanism is arranged above the cutter frame assembly, the cutter frame assembly comprises a cutter frame assembly mounting shell, the pen feeding mechanism comprises a pen feeding mechanism mounting shell, the cutter frame assembly mounting shell and the pen feeding mechanism mounting shell are both arranged in the shell, and the bottom of the pen feeding mechanism mounting shell is detachably connected with the top of the cutter frame assembly mounting shell through a rotary buckling assembly. The rotary buckling structure is arranged to facilitate the installation and separation of the pen feeding mechanism installation shell and the cutter rest assembly installation shell, so that the replacement of cutters in the cutter rest assembly installation shell is facilitated.

Preferably, the rotary buckling assembly comprises a rotary protruding piece arranged on one of the pen feeding mechanism installation shell and the cutter rest assembly installation shell and a rotary sliding groove arranged on the other one, the quantity of the rotary protruding pieces is equal to that of the rotary sliding grooves, two or more than two rotary protruding pieces are respectively arranged, at least one of the rotary protruding pieces is provided with a positioning groove, a limiting protruding point of a limiting positioning groove is arranged in the corresponding rotary sliding groove, and when the rotary protruding piece rotationally slides into the rotary sliding groove, the limiting protruding point is clamped into the positioning groove. The rotary buckling assembly is simple in structure and reliable in limiting after buckling.

Description of the drawings:

FIG. 1 is a schematic view of a conventional automatic pencil sharpener;

FIG. 2 is an exploded view of a conventional nib thickness adjustment mechanism;

FIG. 3 is a schematic diagram of a nib thickness adjusting mechanism according to the first embodiment;

FIG. 4 is a schematic diagram of another structure of a nib thickness adjusting mechanism according to the first embodiment;

FIG. 5 is a schematic view of an automatic pencil sharpener in a second embodiment;

FIG. 6 is a schematic view of a hidden case of the automatic pencil sharpener in the second embodiment;

FIG. 7 is a schematic view of another embodiment of an automatic pencil sharpener with a hidden housing;

FIG. 8 is an enlarged partial schematic view of FIG. 7 at A;

FIG. 9 is a schematic diagram showing an assembly of a carriage assembly and a nib thickness adjustment mechanism according to a second embodiment;

FIG. 10 is a schematic view of a second embodiment of a carriage assembly mounting housing with a second spacer;

FIG. 11 is a schematic view of a second embodiment of a carriage assembly mounting housing with a second spacer removed;

fig. 12 is a schematic structural view of a pen feeding mechanism mounting housing in the second embodiment;

In the prior art diagram: 1 a-a shell, 2 a-a tool rest assembly, 3 a-a tool rest assembly mounting shell, 4 a-a pen inlet channel, 5 a-a nib thickness adjusting mechanism, 6 a-pen blocking block, 7 a-push rod, 8 a-movable piece, 9 a-rotary rod, 10 a-adjusting knob, 11 a-convex rib, 12 a-slide rail and 13 a-positioning assembly;

In the drawings of the utility model: the pen-feeding mechanism comprises a 1-push rod assembly, a 2-gear adjusting assembly, a 3-rotating rod, a 4-adjusting knob, a 5-cam, a 6-driving surface, a 7-positioning assembly, an 8-positioning fluted disc, a 9-clamping piece, a 10-tooth part, an 11-shell, a 12-tool rest assembly, a 13-pen-feeding channel, a 14-hob, a 15-nib thickness adjusting mechanism, a 16-first partition plate, a 17-first supporting seat, a 18-second supporting seat, a 19-tool rest assembly mounting shell, a 20-first mounting space, a 21-protruding part, a 22-second mounting space, a 23-second partition plate, a 24-starting switch, a 25-pen-feeding mechanism mounting shell, a 26-rotating protruding piece, a 27-rotating sliding groove, a 28-positioning groove, a 29-limiting bump, a 30-pen-blocking block and a 31-push rod.

Detailed Description

The utility model will be further described with reference to the accompanying drawings, in conjunction with examples.

Embodiment one:

As shown in fig. 3-4, this embodiment provides a nib thickness adjustment mechanism, including push rod assembly 1 and set up the gear adjustment subassembly 2 in push rod assembly 1 below, push rod assembly 1 includes and hinders a piece 30 and push rod 31, push rod assembly 1 vertical activity sets up, and the top can offset with the nib of pencil in the mechanism of cutting, gear adjustment subassembly 2 includes dwang 3 and adjust knob 4, dwang 3 transversely sets up, adjust knob 4 sets up in the one end of dwang 3 and both synchronous rotation, gear adjustment subassembly 2 still includes the cam 5 of setting at the other end of dwang 3, cam 5 and dwang 3 synchronous rotation just set up under the bottom of push rod assembly 1, the outer fringe of cam 5 is equipped with a plurality of driving surfaces 6 for make different driving surfaces 6 offset with the bottom of push rod assembly 1 when cam 5 rotates to different positions, a plurality of the distance between driving surface 6 and the rotation center of cam 5 is different.

The rotary rod 3 is provided with a positioning component 7 positioned between the adjusting knob 4 and the cam 5, the positioning component 7 comprises a positioning fluted disc 8 and a clamping piece 9, the positioning fluted disc 8 is arranged on the rotary rod 3 and rotates synchronously with the rotary rod 3, the outer edge of the positioning fluted disc 8 is provided with a plurality of tooth parts 10, the number of the tooth parts 10 is equal to that of the driving surfaces 6, and the clamping piece 9 is arranged on one side of the positioning fluted disc 8 and meshed with the tooth parts 10 of the positioning fluted disc 8 and is used for switching different driving surfaces 6 to abut against the bottom end of the push rod component 1 when the clamping piece 9 is positioned to different tooth parts 10; the clamping piece 9 is a marble or a limiting rib, the tooth part 10 of the positioning fluted disc 8 is in a C shape, a V shape or other shapes which can be matched with the marble or the limiting rib, in the embodiment, the tooth part 10 is in a C shape, and the clamping piece 9 is a marble; in this embodiment, the gear of the gear adjusting assembly 2 is five stages, so the number of the driving surfaces 6 and the teeth 10 is five, the cam 5 is semi-disc, which can meet the requirement of five-stage gear shifting, reduce the volume of the cam 5, make the whole structure smaller and more compact, and correspondingly, the teeth 10 are only distributed on one side of the positioning fluted disc 8, i.e. the teeth 10 are arranged in half circle of the positioning fluted disc 8, and the teeth 10 are not arranged in other half circle.

The working principle of the nib thickness adjusting mechanism of the utility model is as follows:

Rotating the adjusting knob 4, and the rotating rod 3 rotates along with the adjusting knob 4, so as to drive the cam 5 to rotate; the adjusting knob 4 rotates to the corresponding gear, the cam 5 also rotates to the driving surface 6 corresponding to the corresponding gear to prop against the bottom end of the push rod assembly 1; loosening the adjusting knob 4, and clamping the marble into the C-shaped tooth part 10 of the positioning fluted disc 8, wherein the cam 5 is limited at the corresponding gear position and does not rotate any more; because the distances between different driving surfaces 6 and the rotation center of the cam 5 are not equal, the height difference exists between the different driving surfaces 6 and the bottom end of the push rod assembly 1, so that the push rod assembly 1 can be moved up and down, and the purpose of adjusting the thickness of the pen point is achieved.

Embodiment two:

As shown in fig. 5-12, and in combination with fig. 3-4, the present embodiment provides an automatic pencil sharpener, which includes a housing 11, and a pencil sharpening mechanism disposed in the housing 11, the pencil sharpening mechanism including a cutter holder assembly 12 and a driving assembly, the cutter holder assembly 12 including a pencil feeding channel 13 and a hob 14 disposed at one side of the pencil feeding channel 13, the driving assembly including a motor and a transmission mechanism, the pencil feeding channel 13 being configured to accommodate a pencil tip therein, the hob 14 being configured to cut the pencil tip in the pencil feeding channel 13, and further includes a pencil tip thickness adjusting mechanism 15 in the first embodiment, the pencil tip thickness adjusting mechanism 15 being disposed in the housing 11 and below the cutter holder assembly 12, a top end of the push rod assembly 1 of the pencil tip thickness adjusting mechanism 15 being capable of abutting against the pencil tip of the pencil in the pencil feeding channel 13.

A first partition plate 16 is further arranged in the shell 11 and between the tool rest assembly 12 and the nib thickness adjusting mechanism 15, a first supporting seat 17 is arranged on one side, close to the nib thickness adjusting mechanism 15, of the first partition plate 16, the adjusting knob 4 is rotatably mounted on the shell 11, one end, far away from the adjusting knob 4, of the rotating rod 3 is rotatably mounted on the first supporting seat 17, and the cam 5 is positioned between the first supporting seat 17 and the shell 11; the first partition plate 16 is further provided with a second supporting seat 18, and the clamping piece 9 is arranged on the second supporting seat 18.

The cutter rest assembly 12 further comprises a cutter rest assembly mounting shell 19, the cutter rest assembly mounting shell 19 is arranged in the shell 11, a first mounting space 20 is formed in the cutter rest assembly mounting shell 19, the pen inlet channel 13 and the hob 14 are arranged in the first mounting space 20, a protruding portion 21 is formed by protruding outwards from part of the side wall of the cutter rest assembly mounting shell 19, a second mounting space 22 communicated with the first mounting space 20 is formed by vertically extending the protruding portion 21, a detachable second partition 23 is arranged at the communication position between the first mounting space 20 and the second mounting space 22, the second partition 23 and the second mounting space 22 form a starting switch mounting shell for mounting a starting switch 24, and the detachable structure of the second partition 23 is achieved by adopting the prior art, for example, a slot for inserting the second partition 23 is formed in the cutter rest assembly mounting shell 19.

The pen feeding mechanism is arranged above the cutter frame assembly 12, and comprises a pen feeding mechanism mounting shell 25, wherein the pen feeding mechanism mounting shell 25 is arranged in the shell 11, and the bottom of the pen feeding mechanism mounting shell 25 is detachably connected with the top of the cutter frame assembly mounting shell 19 through a rotary buckling assembly; the rotary buckling component comprises rotary protruding pieces 26 arranged on one of the cutter frame component mounting shell 19 and the pen feeding mechanism mounting shell 25 and rotary sliding grooves 27 arranged on the other, in the embodiment, the rotary protruding pieces 26 are arranged on the outer side wall of the cutter frame component mounting shell 19, the rotary sliding grooves 27 are arranged on the inner side wall of the pen feeding mechanism mounting shell 25, the number of the rotary protruding pieces 26 is equal to that of the rotary sliding grooves 27, two or more than two are respectively arranged, in the embodiment, the rotary protruding pieces 26 and the rotary sliding grooves 27 are all three and are uniformly distributed along the circumferential direction, positioning grooves 28 are formed in at least one rotary protruding piece 26, and limiting protruding points 29 for limiting the positioning grooves 28 are arranged in the corresponding rotary sliding grooves 27, and when the rotary protruding pieces 26 rotationally slide into the rotary sliding grooves 27, the limiting protruding points 29 are clamped into the positioning grooves 28.

Claims (10)

1. The utility model provides a nib thickness adjustment mechanism, includes push rod assembly (1) and sets up gear adjustment subassembly (2) in push rod assembly (1) below, push rod assembly (1) vertical activity sets up, and the top can offset with the nib of the pencil in the pencil sharpening mechanism, gear adjustment subassembly (2) are including dwang (3) and adjust knob (4), dwang (3) transversely set up, adjust knob (4) set up in the one end of dwang (3) and both synchronous rotation, its characterized in that: the gear adjusting assembly (2) further comprises a cam (5) arranged at the other end of the rotating rod (3), the cam (5) and the rotating rod (3) synchronously rotate and are arranged below the bottom end of the push rod assembly (1), a plurality of driving surfaces (6) are arranged on the outer edge of the cam (5) and used for enabling different driving surfaces (6) to abut against the bottom end of the push rod assembly (1) when the cam (5) rotates to different positions, and the distances between the driving surfaces (6) and the rotating centers of the cam (5) are different.

2. A nib thickness adjustment mechanism according to claim 1, characterized in that: still be equipped with locating component (7) on dwang (3) and lie in between adjust knob (4) and cam (5), locating component (7) are including location fluted disc (8) and joint spare (9), location fluted disc (8) set up on dwang (3) and with dwang (3) synchronous rotation, a plurality of tooth portions (10) have been laid to the outer fringe of location fluted disc (8), the quantity of tooth portions (10) equals with the quantity of driving surface (6), joint spare (9) set up in one side of location fluted disc (8) and mesh with tooth portions (10) of location fluted disc (8) for switch different driving surface (6) and push rod assembly (1)'s bottom offsets when joint spare (9) are fixed a position to different tooth portions (10).

3. A nib thickness adjustment mechanism according to claim 2, characterized in that: the clamping piece (9) is a marble or a limiting rib.

4. A nib thickness adjustment mechanism according to claim 3, characterized in that: the tooth part (10) of the positioning fluted disc (8) is C-shaped or V-shaped.

5. An automatic pencil sharpener, includes shell (11), and sets up the pencil sharpening mechanism in shell (11), pencil sharpening mechanism includes knife rest assembly (12), knife rest assembly (12) are including advancing pencil passageway (13) and set up hobbing cutter (14) in advance pencil passageway (13) one side, advance pencil passageway (13) and be used for supplying the nib of pencil to place wherein, hobbing cutter (14) are used for cutting the nib of advancing pencil in pencil passageway (13), its characterized in that: a nib thickness adjusting mechanism (15) according to any one of claims 1 to 4, wherein the nib thickness adjusting mechanism (15) is arranged in the shell (11) and is positioned below the tool rest assembly (12), and the top end of the push rod assembly (1) of the nib thickness adjusting mechanism (15) can be propped against the nib of the pencil in the pencil inlet channel (13).

6. An automatic pencil sharpener as in claim 5, wherein: still be equipped with first baffle (16) in shell (11) and be located between knife rest subassembly (12) and nib thickness adjustment mechanism (15), one side that first baffle (16) are close to nib thickness adjustment mechanism (15) is equipped with first supporting seat (17), and adjust knob (4) rotate and install on shell (11), and dwang (3) are kept away from one end rotation of adjust knob (4) is installed on first supporting seat (17), and cam (5) are located between first supporting seat (17) and shell (11).

7. The automatic pencil sharpener of claim 6, wherein: the first partition plate (16) is further provided with a second supporting seat (18), and the clamping piece (9) is arranged on the second supporting seat (18).

8. An automatic pencil sharpener as in claim 5, wherein: the utility model provides a pen holder assembly, including cutter holder assembly installation casing (12), cutter holder assembly installation casing (19) set up in shell (11), have first installation space (20) in cutter holder assembly installation casing (19), advance pen passageway (13) and hobbing cutter (14) setting in first installation space (20), the part lateral wall of cutter holder assembly installation casing (19) outwards the evagination and establish formation bellying (21), bellying (21) vertical extension and form second installation space (22) that are linked together with first installation space (20), the intercommunication department of first installation space (20) and second installation space (22) is equipped with detachable second baffle (23), second baffle (23) and second installation space (22) form starting switch installation casing for install starting switch (24).

9. An automatic pencil sharpener as in claim 5, wherein: still including setting up the mechanism of advancing in knife rest assembly (12) top, knife rest assembly (12) are including knife rest assembly installation casing (19), advance a mechanism including advancing a mechanism installation casing (25), knife rest assembly installation casing (19) and advance a mechanism installation casing (25) all set up in shell (11), and advance the bottom of mechanism installation casing (25) and the top of knife rest assembly installation casing (19) through rotatory lock subassembly detachable connection.

10. The automatic pencil sharpener of claim 9, wherein: the rotary buckling assembly comprises rotary protruding pieces (26) arranged on one of a pen feeding mechanism installation shell (25) and a cutter rest assembly installation shell (19) and rotary sliding grooves (27) arranged on the other one, the quantity of the rotary protruding pieces (26) is equal to that of the rotary sliding grooves (27) and the quantity of the rotary protruding pieces are respectively equal to that of the rotary sliding grooves (27), at least one of the rotary protruding pieces (26) is provided with a positioning groove (28), a limiting protruding point (29) of the limiting positioning groove (28) is arranged in the corresponding rotary sliding groove (27), and when the rotary protruding pieces (26) rotationally slide into the rotary sliding grooves (27), the limiting protruding points (29) are clamped into the positioning grooves (28).