阅读说明：本技术 一种削笔器的刀架 (Knife rest of pencil sharpener ) 是由 陈军 于 2021-01-05 设计创作，主要内容包括：本发明公开了一种削笔器的刀架,包括刀架座、容笔仓组件、滚刀组件,所述刀架座前档板上设有一笔插入孔；所述容笔仓组件由容笔仓块、推动支架板、压块连接组成,在容笔仓块上部两侧设有顶面开口的两个大小不同的圆锥笔孔；所述滚刀组件由滚刀、滚刀轴、定位铰连套、传动齿轮连接组成；所述容笔仓组件与滚刀组件可活动调节连接一起,所述容笔仓组件和滚刀组件上、下活动固定在刀架座上,调节所述容笔仓块上设有的调节轴可使容笔仓块上设的大圆锥笔孔和小圆锥笔孔中的一个对准所述笔插入孔定位,实现配接了本发明刀架的削笔器能够选择刨削出适合普通书写要求铅笔和素描使用要求素描笔的两种不同大小圆锥角笔头的铅笔,实现了一机二用的目的。(The invention discloses a knife rest of a pencil sharpener, which comprises a knife rest seat, a pencil bin containing assembly and a hob assembly, wherein a front baffle of the knife rest seat is provided with a pencil inserting hole; the pen containing bin assembly is formed by connecting a pen containing bin block, a pushing support plate and a pressing block, and two conical pen holes with different sizes and with openings on the top surfaces are formed in two sides of the upper part of the pen containing bin block; the hob assembly is formed by connecting a hob, a hob shaft, a positioning hinged sleeve and a transmission gear; the pencil containing bin assembly and the hob assembly are movably connected together in an adjustable mode, the pencil containing bin assembly and the hob assembly are movably fixed on the tool rest base up and down, and one of a large conical pen hole and a small conical pen hole which are formed in the pencil containing bin block can be aligned to the pen inserting hole for positioning by adjusting an adjusting shaft which is arranged on the pencil containing bin block, so that a pencil sharpener which is matched with the tool rest can selectively dig pencils with conical nib heads of two different sizes which are suitable for common pencils and sketches with sketching requirements, and the purpose of one machine for two purposes is achieved.)

1. The utility model provides a knife rest of sharpener, includes knife rest seat (1), holds a storehouse subassembly (2), hobbing cutter subassembly (3), its characterized in that: the tool rest base (1) comprises two support beams (11) which are arranged on two axial sides in a parallel and symmetrical mode, a front baffle plate (12) is arranged at the front end of each support beam (11), a rear baffle plate (13) is arranged at the rear end of each support beam (11), a partition plate (14) is arranged in the middle of each support beam (11), a front inner cavity (15) which is straight up and down is formed between the front side surface of each partition plate (14) and the inner side surface of each front baffle plate (12) and between the rear side surfaces of the two support beams (11), and a rear inner cavity (16) which is straight up and down is formed between the rear side surface of each partition plate (14) and the inner side surface of each rear baffle plate (13) and between the two side surfaces of the two support; a circular convex column (121) is arranged at the middle upper part of the front end surface of the front baffle plate (12), a pen insertion hole (123) is arranged at the center of the circular convex column (121), and the axial lead of the pen insertion hole (123) is concentric with the axial lead of the knife rest base (1); a shaft through hole (124) is formed in the middle lower part of the front end surface of the front baffle plate (12) and is vertical to the axis of the pen insertion hole (123); two convex blocks (125) are respectively arranged between two end parts of the inner side surface of the front baffle plate (12) and the connecting parts of the two bracket beams (11), and two inner surfaces corresponding to the two convex blocks (125) are respectively provided with guide sliding chutes (126) with symmetrically distributed bottom openings and top seals; a semicircular upper groove (141) coaxial with the pen insertion hole (123) is formed in the middle of the top surface of the partition plate (14), a semicircular lower groove (142) coaxial with the shaft through hole (124) is formed in the middle of the bottom surface of the partition plate (14), a positioning raised head (143) is arranged on the front side surface of the partition plate (14) between the upper groove (141) and the lower groove (142), two symmetrical hinged supports (17) are arranged on the two support beams (11) close to the inner side of the rear baffle plate (13), and coaxial hinged holes (171) are formed in the two hinged supports (17); two symmetrical back-off legs (18) are respectively arranged on the two outer side surfaces of the two support beams (11) close to the rear side of the partition plate (14); the rear end surface of the rear baffle plate (13) is provided with a connecting piece (132);

the pen containing bin assembly (2) comprises a pen containing bin block (21), a pushing support plate (22) and a pressing block (23), a connecting shaft (211) is arranged on the lower portion of the front side face of the pen containing bin block (21), an eccentric wheel (212) is arranged on the rear portion of the connecting shaft (211), an adjusting shaft (213) is arranged on the lower portion of the rear side face of the pen containing bin block (21), the adjusting shaft (213) and the connecting shaft (211) are coaxial, a large cone hole (214) and a small cone hole (215) with top surfaces opened are respectively arranged on two sides of the upper portion of the pen containing bin block (21), the axial angle (alpha) between the large cone hole (214) and the small cone hole (215) is 90 degrees, the conical angle of the large cone hole (214) is 14-20 degrees, and the conical angle of the small cone hole (215) is 7-13 degrees; a first positioning groove (201) is formed in the surface from the rear port of the large cone pen hole (214) to one side of the adjusting shaft (213), and a second positioning groove (202) is formed in the surface from the rear port of the small cone pen hole (215) to one side of the adjusting shaft (213); symmetrical guide keys (221) are respectively arranged at two side parts of the pushing support plate (22), a via hole (222) is arranged in the middle upper part of the surface of the pushing support plate (22), a special-shaped eccentric hole (223) deviating from the central axis of the support plate is arranged at the middle lower part of the surface of the pushing support plate (22), two symmetrical hinged supports (224) are arranged at the upper end of the pushing support plate (22), and coaxial support hinged holes (225) are arranged in the two hinged supports (224); a semicircular long groove (231) is formed in the middle of the pressing block (23), two symmetrical upper convex plates (232) are respectively arranged on two sides of the pressing block (23), and two corresponding buckling holes (233) are formed in the two upper convex plates (232);

the hob assembly (3) comprises a hob (31), a hob shaft (32), a positioning hinge sleeve (33) and a transmission gear (34), the hob (31) is sleeved on the hob shaft (32) and connected in a sliding fit manner, a hinge joint (321) is arranged at the front end of the hob shaft (32), and a hinge through hole (322) is formed in the hinge joint; the positioning hinge sleeve (33) is provided with a connecting through hole (331), and the lower convex part is provided with a transverse hinge through hole (332); a connecting shaft (341) is arranged on the front side surface of the transmission gear (34), the front shaft part of the connecting shaft (341) is smaller than the rear shaft part, and a central through hole (342) is formed in the center of the transmission gear (34); the positioning hinge sleeve (33) is sleeved on the rear shaft part of the connecting shaft (341) of the transmission gear (34) through a connecting through hole (332) and is connected with the rear shaft part in a sliding fit manner; the central through hole (342) of the transmission gear (34) is connected with the tail part of the hob shaft (32) in a sliding fit and sleeved mode, and the front shaft part of the transmission gear (34) is tightly matched and fixedly connected with the shaft hole of the hob (31);

the heads of the two guide keys (221) of the pushing support plate (22) are upwards inserted into the guide sliding groove (126) of the front baffle plate (12) of the tool rest base (1) to be connected in a sliding fit manner; the connecting shaft (211) of the pen containing bin block (21) is inserted into the special-shaped eccentric hole (223) of the pushing support plate (22) to be movably matched with the special-shaped eccentric hole (223) at the part of the fan-shaped eccentric wheel (212), the connecting shaft (211) is inserted into the shaft through hole (124) of the knife rest base (1) to be connected in a sliding fit manner, the pen containing bin block (21) is placed into the front inner cavity (15) of the knife rest base (1), and the adjusting shaft (213) of the pen containing bin block (21) is placed into the lower groove (142) of the knife rest base (1) to be connected in a sliding fit manner; the pressing block (23) is fastened and fixed at the lower parts of the two support beams (11) of the tool rest base (1) through the two fastening holes (233) and the two back-off pins (18), a long groove (231) of the pressing block (23) is connected with the adjusting shaft (213) in a sliding fit manner, and the axial front side surface of the pressing block (23) is flush with the front side surface of the partition plate (14); the lower side protruding part of the positioning hinged sleeve (33) is placed into two symmetrical hinged seats (17) on the cutter frame seat (1) and fixedly hinged and connected together through a rear shaft pin (40) and a rear clamping spring (41), and the front end hinged head (321) of the roller shaft (32) is placed into a hinged support (224) at the upper end of the pushing support plate (22) and fixedly hinged and connected together through a front shaft pin (50) and a clamping spring (51) to form a complete pencil sharpener cutter frame.

2. A holder for a pencil sharpener according to claim 1, characterised in that the axial width of the rear cavity (16) is smaller than the axial width of the front cavity (15).

3. The holder of claim 1, wherein the head of the positioning projection (143) is a half-round head.

4. The holder of claim 1, wherein said sector shaped eccentric (212) is sector shaped.

5. A holder for a pencil sharpener according to claim 1 where the large cone aperture (214) has a cone angle of 16 °.

6. A holder for a pencil sharpener according to claim 1 where said pencil hole (215) has a taper angle of 10 °.

7. The holder of claim 1, wherein the cylindrical post (121) is further provided with a square head (122) at a central front portion thereof.

8. The holder of claim 1, wherein the connecting members (132) are four connecting cylinders arranged at four corners.

9. The tool rest of the pencil sharpener as claimed in claim 1, wherein a lower positioning mechanism is further arranged between the lower surface of the rear side of the pencil containing block (21) and the axial front side surface of the pressing block (23), the lower positioning mechanism comprises a lower positioning raised head (234) arranged in the middle of the axial front side of the pressing block (23), the head of the positioning raised head (234) is a semi-circular head, and the tool rest further comprises a third positioning groove (203) and a fourth positioning groove (204) which are coaxially arranged with the first positioning groove (201) and the second positioning groove (202) and are respectively arranged on the lower surface of the rear side of the pencil containing block (21).

10. The knife rest of the pencil sharpener as claimed in claim 1, wherein a self-restoring mechanism is further arranged at the tail of the adjusting shaft (213), the self-restoring mechanism comprises an open slot (144) with a semicircular bottom and arranged in the middle of the lower portion of a rear baffle (13) of the knife rest base (1), a clamp spring groove (60), a spring (61) and a clamp spring (62), which are arranged at the tail of the adjusting shaft (213), the tail of the adjusting shaft (213) is connected with the open slot (144) in a sliding fit manner, the spring (41) is sleeved at the tail of the adjusting shaft (213), the front end face of the spring (61) is abutted against the rear side face of the rear baffle (13) and is abutted against the clamp spring (62) clamped in the clamp spring groove (60).

Technical Field

The invention relates to the technical field of stationery, in particular to a knife rest of a pencil sharpener.

Background

The pencil sharpener is a stationery product for daily study and office, the existing pencil sharpeners on the market have a plurality of styles, and the existing pencil sharpener provided with the hob-type knife rest is deeply loved by users due to convenient use, short pencil sharpening stable time and good sharpening quality. The pencil sharpener has the advantages that the main body structures of the tool holders provided with the hobs and serving as core components of the pencil sharpener are almost the same regardless of the hand sharpener or the electric sharpener, the structure of the tool holders is shown in figures 15-1 and 15-2 and comprises a tool holder base 1 ', the hobs 2', a hob shaft 3 'and a transmission gear 4', one end of the tool holder base 1 'is provided with a pencil accommodating bin 11' for inserting a pencil, the pencil accommodating bin 11 'is in a conical structure and is provided with a cutting long hole 12' along the side surface of the pencil accommodating bin, the hobs 2 'are sleeved on the hob shaft 3' and are in sliding fit connection, two ends of the hob shaft 3 'are fixed at two end fixing positions of the tool holder base 1', the hobs 2 'are matched with the cutting long hole 12', and the transmission gear 4 'is fixedly connected with one side of the hob 2'. After the tool rest is matched and connected with the pencil sharpener, a transmission gear of the tool rest is meshed and connected with a gear ring of a driving assembly of the pencil sharpener, and the driving assembly can be hand-operated or electric. Although the pencil sharpener has many advantages, the conicity of the conical pencil accommodating bin in the tool rest structure is fixed, and the hob matched with the sharpening long hole in the pencil accommodating bin is also fixedly connected to the tool rest seat, so that the conicity angle of the sharpened pencil conical head is fixed, the length of the wood wrapping rod of the pencil conical head and the length of the pencil lead part are correspondingly fixed, and the pencil sharpener can only be suitable for sharpening pencils required by common writing, for example, a sketch pen for sharpening art sketch cannot be used, and the sketch pen is different from pencils required by common writing, requires the pencil lead to be thin, sharp and long, and can be consumed, and generally requires the pencil lead to be exposed by the wood wrapping rod of the pencil conical head by more than 1.5cm, so the pencil sharpener is generally manually used. The existing market also provides a sharpener special for plain writing pencils, and if a user needs the sharpener to shave common writing pencils and plain writing pencils, the user only needs to be provided with two different sharpeners at the same time, so that resources are wasted, and inconvenience is brought to use.

Aiming at the problems, the market also provides an electric pencil sharpener suitable for planing two conical heads, one end of a built-in tool rest is provided with two parallel conical pen containing bins for pencils to be inserted, the hob is connected between the two pen containing bins, the conicity of the pencil conical head formed by cutting the conical pen containing bins with large cone angles is large, the length of a pencil lead is short, the conicity of the pencil conical head formed by cutting the conical pen containing bins with large cone angles is small, and the length of the pencil lead is long, however, the structure of the pencil sharpener is that the product is the same as the existing product, the hob is fixedly connected with a tool rest main body, the difference is that the two offset conical pen containing bins can be concentric after being converted from left to right with a pencil inserting hole, the conicity difference between the two conical bins and the hob is not much, so the conicity difference of the pencil conical heads planed by the two conical bins is not very large, the length of the pencil lead is limited, and the pencil sharpener cannot completely meet the planing requirements of common writing pencils and sketch pencils.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art, and provides a knife rest of a pencil sharpener, wherein the pencil sharpener matched with the knife rest with a novel structure can be used for selectively planing pencils with two conical-angle pen points of different sizes which are suitable for pencils required by common writing and sketching, so that the purpose of one machine for two purposes is really realized.

The technical scheme adopted by the invention is as follows: the utility model provides a knife rest of sharpener, includes knife rest seat, holds a storehouse subassembly, hobbing cutter subassembly, its characterized in that: the tool rest seat comprises two support beams which are arranged at two axial sides and are in parallel symmetry, front baffles are arranged at the front ends of the two support beams, rear baffles are arranged at the rear ends of the two support beams, a partition plate is arranged in the middle of the two support beams, a front inner cavity which is straight up and down is formed between the front side surface of the partition plate and the inner side surface of the front baffles as well as between the front side surface of the partition plate and the two side surfaces of the two support beams, and a rear inner cavity which is straight up and down is formed between the rear side surface of the partition plate and the inner side surface of the rear baffles as; a circular convex column is arranged at the middle upper part of the surface of the front end of the front baffle plate, a pen insertion hole is arranged at the center of the circular convex column, and the axial lead of the pen insertion hole is concentric with the axial lead of the knife rest seat; a shaft through hole is formed in the middle lower part of the front end surface of the front baffle plate and is vertical to the axis of the pen insertion hole; two convex blocks are respectively arranged between two end parts of the inner side surface of the front baffle and the connecting part of the two bracket beams, and two corresponding inner surfaces of the two convex blocks are respectively provided with guide sliding chutes with symmetrically distributed bottom openings and top seals; the middle part of the top surface of the partition board is provided with a semicircular upper groove which is coaxial with the pen insertion hole, the middle part of the bottom surface of the partition board is provided with a semicircular lower groove which is coaxial with the shaft through hole, the front side surface of the partition board between the upper groove and the lower groove is provided with a positioning raised head, the two support beams are provided with two symmetrical hinged supports close to the inner side of the rear baffle plate, and the two hinged supports are provided with coaxial hinged holes; two symmetrical reverse buckling feet are respectively arranged on the two outer side surfaces of the two support beams close to the rear side of the partition plate; the surface of the rear end of the rear baffle is provided with a connecting piece;

the pen containing bin assembly comprises a pen containing bin block, a pushing support plate and a pressing block, wherein a connecting shaft is arranged at the lower part of the front side face of the pen containing bin block, an eccentric wheel is arranged at the rear part of the connecting shaft, an adjusting shaft is arranged at the lower part of the rear side face of the pen containing bin block, the adjusting shaft and the connecting shaft are coaxial, a large conical pen hole and a small conical pen hole with top surface openings are respectively arranged at two sides of the upper part of the pen containing bin block, the axial angle alpha between the large conical pen hole and the small conical pen hole is 90 degrees, the conical angle of the large conical pen hole 214 is 14-20 degrees, and the conical angle of the small conical pen hole 215 is 7-13 degrees; a first positioning groove is formed in the surface from the rear port of the large cone pen hole to one side of the adjusting shaft, and a second positioning groove 202 is formed in the surface from the rear port of the small cone pen hole to one side of the adjusting shaft; the two sides of the pushing support plate 22 are respectively provided with symmetrical guide keys 221, the middle upper part of the surface of the pushing support plate 22 is provided with a via hole, the middle lower part of the surface of the pushing support is provided with a special-shaped eccentric hole deviating from the central axis of the support plate, the upper end of the pushing support plate is provided with two symmetrical hinged supports, and the two hinged supports are internally provided with coaxial support hinged holes; a semicircular long groove is formed in the middle of the pressing block, two symmetrical upper convex plates are respectively arranged on two sides of the pressing block, and two corresponding buckling holes are formed in the two upper convex plates;

the hob assembly comprises a hob, a hob shaft, a positioning hinge sleeve and a transmission gear, the hob is sleeved on the hob shaft and connected in a sliding fit manner, a hinge joint is arranged at the front end of the hob shaft, and a hinge through hole is formed in the hinge joint; the positioning hinge connecting sleeve is provided with a connecting through hole, and the lower convex part is provided with a transverse hinge through hole; the front side surface of the transmission gear is provided with a connecting shaft, the front shaft part of the connecting shaft is smaller than the rear shaft part, and the center of the transmission gear is provided with a central through hole; the positioning hinge sleeve is sleeved on the rear shaft part of the connecting shaft of the transmission gear through a connecting through hole and is connected in a sliding fit manner; the central through hole of the transmission gear is in sliding fit and sleeved connection with the tail part of the hob shaft, and the front shaft part of the transmission gear is tightly matched and fixedly connected with the shaft hole of the hob;

the heads of the two guide keys of the pushing support plate are upwards inserted into the guide sliding grooves of the front baffle plate of the tool rest seat to be connected in a sliding fit manner; the connecting shaft of the pen containing block is inserted into the special-shaped eccentric hole of the pushing support plate until the fan-shaped eccentric wheel part is in movable fit with the special-shaped eccentric hole, the connecting shaft is inserted into the shaft through hole of the knife rest seat to be in sliding fit connection, the pen containing block is arranged in the front inner cavity of the knife rest seat, and the adjusting shaft of the pen containing block is arranged in the lower groove of the knife rest seat to be in sliding fit connection; the pressing block is buckled and fixed at the lower parts of the two support beams of the tool rest seat through the two buckling holes and the two back-off feet, the long groove of the pressing block is connected with the adjusting shaft in a sliding fit manner, and the axial front side surface of the pressing block is flush with the front side surface of the partition plate; the lower side protruding part of the positioning hinged sleeve is arranged in two symmetrical hinged seats on the cutter frame seat and fixedly hinged together by a rear shaft pin and a rear snap spring, and the front end hinged head of the roller shaft is arranged in a hinged support at the upper end of the pushing support plate and fixedly hinged together by a front shaft pin and a snap spring to form a complete pencil sharpener cutter frame.

Further, the axial width of the rear inner cavity is smaller than that of the front inner cavity.

Furthermore, the head of the positioning raised head is a semicircular head.

Furthermore, the fan-shaped eccentric wheel is fan-shaped.

Further, the taper angle of the big taper pen hole is 16 degrees.

Further, the taper angle of the small cone pen hole is 10 degrees.

Furthermore, the middle front part of the round convex column is also provided with a square head.

Furthermore, the connecting pieces are four connecting cylinders distributed at four corners.

Furthermore, a lower positioning mechanism is further arranged between the lower surface of the rear side face of the pen containing bin block and the axial front side surface of the pressing block, the lower positioning mechanism comprises a lower positioning raised head arranged in the middle of the axial front side of the pressing block, the head of the positioning raised head is a semicircular head, and the lower positioning mechanism further comprises a third positioning groove and a fourth positioning groove which are arranged on the lower surface of the rear side face of the pen containing bin block and are coaxial with the first positioning groove and the second positioning groove.

Further, the afterbody of regulating spindle still be equipped with from the answer mechanism, include from the answer mechanism the bottom semicircular open slot that is equipped with in the middle of the back plate lower part of tool rest seat with jump ring groove and spring, jump ring that the afterbody of regulating spindle was equipped with constitute, the regulating spindle afterbody with open slot sliding fit connects, the spring cup joints the afterbody of regulating spindle, the terminal surface before the spring with back plate trailing flank leans on mutually and ends the position, the spring rear end face leans on mutually with the jump ring of joint on the jump ring groove and ends the position.

Compared with the prior art, the invention has the advantages that: the pencil sharpener tool rest adopts the above brand-new structural design, realizes that only one pencil inserting hole is arranged on the tool rest, two conical pen containing bins with different large and small tapers are arranged in the tool rest and can be adjusted and selected according to requirements, one of the two conical pen containing bins can be conveniently arranged corresponding to the pencil inserting hole of the tool rest through adjustment and can keep concentric, so that a pencil sharpener matched with the tool rest can be used for selectively planing pencils with two conical nib heads with different sizes, the planed pencil head with the large conical angle nib has large conicity, the pencil lead length is short, the pencil sharpener tool rest is suitable for common writing pens, the planed pencil head with the small conical nib has small conicity, and the pencil lead length is long, and the pencil sharpener is suitable for sketch pens. The pencil sharpener knife rest has compact and reasonable structure and convenient matching use, and the pencils with two pencils of different lengths, which are sharpened by the pencil sharpener equipped with the knife rest, can completely meet the requirements of common writing and sketch use and can meet the requirements of art designing workers.

Drawings

Fig. 1 is a perspective view of an embodiment of the present invention.

Fig. 2 is a schematic sectional structure diagram of the novel embodiment of the invention.

Fig. 3 is a front perspective exploded view of an embodiment of the present invention.

Fig. 4 is a schematic view of an upward three-dimensional structure of a tool rest base according to an embodiment of the invention.

Fig. 5-1 and 5-2 are schematic structural views of the pushing support plate according to the embodiment of the invention.

FIGS. 6-1 to 6-4 are schematic structural views of a pen accommodating bin block according to an embodiment of the invention.

Fig. 7 is a partial cross-sectional view of the connection between the pushing support plate and the front stop plate of the tool holder seat according to the embodiment of the invention.

Fig. 8 is a schematic diagram illustrating a mutual positional relationship between the fan-shaped eccentric wheel of the pen accommodating block and the eccentric opposite-shaped hole of the pushing bracket plate when the large conical pen hole of the pen accommodating member is adjusted to correspond to the pen insertion hole of the knife rest base according to the embodiment of the present invention.

Fig. 9 is a schematic diagram illustrating a mutual positional relationship between the fan-shaped eccentric wheel of the pen chamber block and the eccentric opposite-shaped hole of the pushing support plate when the small cone hole of the pen chamber member is adjusted to correspond to the pen insertion hole of the knife rest base according to the embodiment of the present invention.

Fig. 10 is a schematic diagram of the conicity angle of the pencil holding bin formed by the large conical hole and the hob when the large conical hole of the pencil holding bin is adjusted to correspond to the pencil insertion opening of the holder seat according to the embodiment of the present invention.

Fig. 11 is a schematic diagram of a cone angle of the pencil holding bin formed by the small cone hole and the hob when the small cone hole of the pencil holding bin is adjusted to correspond to the pencil insertion opening of the holder base according to the embodiment of the present invention.

Fig. 12-1 and 12-2 are schematic diagrams respectively showing the relationship that two pencil leads with different large and small conicity can be shaved by adjusting two large and small pen bins formed according to the embodiment of the invention.

Fig. 13 is a schematic structural view of the tool holder and the hand driver of the hand sharpener of the present invention.

Fig. 14 is an overall configuration diagram of a sharpener in which a holder according to an embodiment of the present invention is mounted.

Fig. 15-1 and 15-2 are schematic structural views of a main body of a prior art hob-type pencil sharpener.

Detailed Description

The invention is described in further detail below with reference to the figures and examples.

Referring to fig. 1 to 7, a knife rest of a pencil sharpener comprises a knife rest base 1, a pencil bin accommodating component 2 and a hob component 3, and is characterized in that: the tool rest base 1 comprises two support beams 11 which are arranged at two axial sides in parallel and symmetrical mode, front baffles 12 are arranged at the front ends of the two support beams 11, rear baffles 13 are arranged at the rear ends of the two support beams 11, a partition plate 14 is arranged in the middle of the two support beams 11, front inner cavities 15 which are straight up and down are formed between the front side surface of the partition plate 14 and the inner side surfaces of the front baffles 12 and between the front side surfaces of the two support beams 11, and rear inner cavities 16 which are straight up and down are formed between the rear side surface of the partition plate 14 and the inner side surfaces of the rear baffles 13 and between the two side surfaces of the two support beams 11; the axial width of the rear inner cavity 16 is smaller than that of the front inner cavity 15; a circular convex column 121 is arranged at the middle upper part of the front end surface of the front baffle 12, a pen insertion hole 123 is arranged at the center of the circular convex column 121, and the axial lead of the pen insertion hole 123 is concentric with the axial lead of the knife rest base 1; a shaft through hole 124 is arranged at the middle lower part of the front end surface of the front baffle 12 and is vertical to the axle center of the pen insertion hole 123; two convex blocks 125 are respectively arranged between two end parts of the inner side surface of the front baffle 12 and the connecting parts of the two bracket beams 11, and two inner surfaces corresponding to the two convex blocks 125 are respectively provided with guide sliding chutes 126 which are symmetrically distributed and have an opening at the bottom end and a sealed top end; a semicircular upper groove 141 coaxial with the pen insertion hole 123 is formed in the middle of the top surface of the partition 14, a semicircular lower groove 142 coaxial with the shaft through hole 124 is formed in the middle of the bottom surface of the partition 14, a positioning raised head 143 is formed on the front side surface of the partition 14 between the upper groove 141 and the lower groove 142, and the head of the positioning raised head 143 is a semicircular head; two symmetrical hinged supports 17 are arranged on the two support beams 11 close to the inner side of the rear baffle 13, and coaxial hinged holes 171 are formed in the two hinged supports 17; two symmetrical back-off legs 18 are respectively arranged on the two outer side surfaces of the two support beams 11 close to the rear side of the partition plate 14; the rear end surface of the rear baffle 13 is provided with connecting pieces 132, the structural form of the connecting pieces 132 in the actual product can be set according to the requirements of the pencil sharpener driving assembly matched with the connecting pieces 132, and the connecting pieces 132 arranged on the rear end surface of the embodiment are four connecting cylinders distributed in four corners; the middle front part of the round convex column 121 is also provided with a square head 122 which is convenient to be matched and connected with a pencil feeding component of the pencil sharpener.

The pen container assembly 2 comprises a pen container block 21, a pushing support plate 22 and a pressing block 23, wherein a connecting shaft 211 is arranged at the lower part of the front side surface of the pen container block 21, a fan-shaped eccentric wheel 212 is arranged at the rear part of the connecting shaft 211, an adjusting shaft 213 is arranged at the lower part of the rear side surface of the pen container block 21, the adjusting shaft 213 and the connecting shaft 211 are coaxial, a large cone hole 214 and a small cone hole 215 with open top surfaces are respectively arranged at two sides of the upper part of the pen container block 21, an axial angle alpha between the large cone hole 214 and the small cone hole 215 is 90 degrees, the cone angles of the large cone hole 214 and the small cone hole 215 are selected and set according to actual product requirements, wherein the cone angle of the large cone hole 214 can be selected between 14 and 20 degrees, the cone angle of the small cone hole 215 can be selected between 7 and 13 degrees, the cone angle of the large cone hole 214 selected and set in the embodiment is 16 degrees, the cone angle of the small cone hole 215 is 10 degrees; a first positioning groove 201 is formed in the surface from the rear port of the large cone hole 214 to the side of the adjusting shaft 213, and a second positioning groove 202 is formed in the surface from the rear port of the small cone hole 215 to the side of the adjusting shaft 213; two sides of the pushing support plate 22 are respectively provided with symmetrical guide keys 221, the middle upper part of the surface of the pushing support plate 22 is provided with a via hole 222, the middle lower part of the surface of the pushing support plate 22 is provided with a special-shaped eccentric hole 223 deviating from the central axis of the support plate, the upper end of the pushing support plate 22 is provided with two symmetrical hinged supports 224, and the two hinged supports 224 are internally provided with coaxial support hinged holes 225; a semicircular long groove 231 is formed in the middle of the pressing block 23, two symmetrical upper protruding plates 232 are respectively arranged on two sides of the pressing block 23, and two corresponding buckling holes 233 are formed in the two upper protruding plates 232.

The hob assembly 3 comprises a hob 31, a hob shaft 32, a positioning hinge sleeve 33 and a transmission gear 34, the hob 31 is sleeved on the hob shaft 32 and connected in a sliding fit manner, a hinge joint 321 is arranged at the front end of the hob shaft 32, and a hinge through hole 322 is arranged on the hinge joint; the positioning hinge sleeve 33 is provided with a connecting through hole 331, and the lower convex part is provided with a transverse hinge through hole 332; a connecting shaft 341 is arranged on the front side surface of the transmission gear 34, the front shaft part of the connecting shaft 341 is smaller than the rear shaft part, and a central through hole 342 is arranged at the center of the transmission gear 34; the positioning hinge sleeve 33 is sleeved on the rear shaft part of the connecting shaft 341 of the transmission gear 34 through a connecting through hole 332 and is in sliding fit connection; the central through hole 342 of the transmission gear 34 is connected with the tail of the hob shaft 32 in a sliding fit and sleeved manner, and the front shaft part of the transmission gear 34 is tightly matched and fixedly connected with the shaft hole of the hob 31.

The heads of the two guide keys 221 of the pushing support plate 22 are inserted upwards into the guide sliding grooves 126 of the front baffle plate 12 of the tool rest base 1 to be connected in a sliding fit manner; the connecting shaft 211 of the pen containing block 21 is inserted into the special-shaped eccentric hole 223 of the pushing support plate 22 to the sector eccentric wheel 212 to be movably matched with the special-shaped eccentric hole 223, the connecting shaft 211 is inserted into the shaft through hole 124 of the knife rest base 1 to be connected in a sliding fit manner, the pen containing block 21 is placed into the front inner cavity 15 of the knife rest base 1, and the adjusting shaft 213 of the pen containing block 21 is placed into the lower groove 142 of the knife rest base 1 to be connected in a sliding fit manner; the pressing block 23 is fastened and fixed on the lower parts of the two support beams 11 of the tool rest base 1 through the two fastening holes 233 and the two back-off legs 18, the long groove 231 of the pressing block 23 is connected with the adjusting shaft 213 in a sliding fit manner, and the axial front side surface of the pressing block 23 is flush with the front side surface of the partition plate 14; the lower protruding parts of the positioning hinge sleeves 33 are placed in the two symmetrical hinge seats 17 on the tool rest base 1 and fixedly hinged together by the rear shaft pins 40 and the rear snap springs 41, and the front end hinge joints 321 of the roller shafts 32 are placed in the hinge supports 224 at the upper ends of the pushing support plates 22 and fixedly hinged together by the front shaft pins 50 and the snap springs 51 to form a complete pencil sharpener tool rest.

A lower positioning mechanism is further arranged between the lower surface of the rear side face of the pen containing block 21 and the axial front side surface of the pressing block 23, the lower positioning mechanism comprises a lower positioning raised head 234 arranged in the middle of the axial front side of the pressing block 23, the head of the positioning raised head 234 is a semicircular head, and the lower surface of the rear side face of the pen containing block 21 is provided with a third positioning groove 203 and a fourth positioning groove 204 which are coaxial with the first positioning groove 201 and the second positioning groove 202.

The afterbody of regulating spindle 213 still is equipped with from the return mechanism, include from the return mechanism be equipped with bottom semicircular open slot 144 in the middle of the back plate 13 lower part of tool rest base 1 with jump ring groove 60 and spring 61, jump ring 62 that the afterbody of regulating spindle 213 was equipped with constitute, the regulating spindle 213 afterbody with open slot 144 sliding fit connects, spring 41 cup joints the afterbody of regulating spindle 213, the terminal surface before the spring 61 with back plate 13 trailing flank leans on mutually only the position, spring 61 rear end face leans on only the position mutually with jump ring 62 of joint on jump ring groove 60.

The working principle of the pencil sharpener tool rest is as follows:

1. adjusting the tool holder to a state suitable for planing a common writing pen: the adjusting shaft 213 is pushed forward by hand to make the pen container block 21 and the pushing support plate 22 lean against each other, at this time, the adjusting shaft 213 is rotated counterclockwise to make the large conical pen hole 214 on the pen container block 21 correspond to the pen insertion hole 123 on the front baffle 12 of the knife rest base 1 and keep coaxial, at this time, the adjusting shaft 213 is pulled backward by hand to make the first positioning groove 201 on the pen container block 21 and the positioning protrusion 143 on the partition plate 14 engaged and positioned and connected, and at the same time, the third positioning groove 203 on the pen container block 21 and the lower positioning protrusion 234 on the pressing block 23 are engaged and positioned and connected at the same time. When the pen containing bin block 21 rotates, the sector eccentric wheel 212 arranged on the connecting shaft 211 of the pen containing bin block 21 also simultaneously pushes the special-shaped eccentric hole 223 on the pushing support plate 22, so that the pushing support plate 22 slides upwards along the guide chute 126 of the front baffle plate 12 to drive the roller shaft 32 hinged with the pushing support plate to be linked so as to change the included angle between the roller shaft 32 and the axial lead of the knife rest base 1, as shown in fig. 8, the stop position is reached when the point a of the sector eccentric wheel 212 contacts and abuts with the point a 'of the upper flat surface a' of the special-shaped eccentric hole 223 and the point a of the sector eccentric wheel 212 vertically and downwards corresponds to the shaft peripheral surface of the connecting shaft 211 and the point b 'of the lower flat surface b' of the special-shaped eccentric hole 223; to this end, the cutting surface of the hob 31 sleeved by the hob shaft 32 and the top opening of the large conical pen hole 214 are matched to form a large conical pen container, as shown in fig. 10 and 12-1, in the drawing, "a" represents the tool rest, "a'" represents a pencil, "d" represents the conical angle of the large conical pen container, the conical angle is selected and set according to the actual product requirements, the angle is selected and set to be 16 ° in the embodiment, and the pencil is suitable for planing a large pencil head, has a large conicity, has a short pencil lead length, and is suitable for pens with common writing requirements.

2. Adjusting the tool rest to a pen state suitable for planing sketch use: the adjusting shaft 213 is pushed forward by hand to make the pen container block 21 abut against the pushing support plate 22, at this time, the adjusting shaft 213 is rotated clockwise to make the small conical pen hole 214 on the pen container block 21 correspond to the pen insertion hole 123 arranged on the front baffle 12 of the knife rest base 1 and keep the same axis, at this time, the adjusting shaft 213 is pulled backward by hand to make the second positioning groove 202 arranged on the pen container block 21 and the positioning protrusion 143 arranged on the partition plate 14 be engaged and positioned, and at the same time, the fourth positioning groove 204 arranged on the pen container block 21 and the lower positioning protrusion 234 arranged on the pressing block 23 are engaged and positioned at the same time. When the pen containing bin block 21 rotates, the sector eccentric wheel 212 arranged on the connecting shaft 211 of the pen containing bin block 21 also simultaneously pushes the special-shaped eccentric hole 223 on the pushing support plate 22, so that the pushing support plate 22 slides downwards along the guide chute 126 of the front baffle plate 12 to drive the roller shaft 32 hinged with the pushing support plate to be linked so as to change the included angle between the roller shaft 32 and the axial lead of the knife rest base 1, as shown in fig. 9, the c point of the sector eccentric wheel 212 contacts and abuts with the lower straight surface b 'point of the special-shaped eccentric hole 223 and the c point of the sector eccentric wheel 212 vertically and upwards corresponds to the shaft peripheral surface of the connecting shaft 211 and the upper straight surface a' point of the special-shaped eccentric hole 223 to contact and abut against the stop position; to this end, the cutting surface of the hob 31 sleeved by the hob shaft 32 and the top opening of the large cone hole 214 cooperate to form a small cone pen container, as shown in fig. 11 and 12-2, in the drawing, "a" represents the tool rest, "a'" represents a pencil, "e" represents the cone angle of the small cone pen container, the cone angle is selected and set according to the actual product requirement, in this embodiment, the selected setting is 10 °, which is suitable for planing a pen with a small cone at the head of the pencil, and the length of the pen core is long, and is suitable for using a pen with a sketch requirement.

Fig. 13 shows a state in which the cutter holder of the present invention is used in conjunction with a hand driver of a hand-operated pencil sharpener, in which a is the cutter holder and B is the hand driver, the cutter holder is connected with one side of the head of the hand driver through a tail connector, a transmission gear of the cutter holder is engaged with a driving ring gear 101 of the hand driver, and an adjusting shaft of the cutter holder is placed in a housing of the hand driver to be engaged with one end of the adjusting shaft extending out of one side of the housing of the driver to be connected with a knob for adjustment.

Fig. 14 shows the overall structure of a pencil sharpener with the present holder, in which 201 is a housing, 202 is the holder of the present invention, 203 is a hand driver, 204 is an automatic pencil feeding member, 205 is a front cover, and 206 is a dust storage box. The pencil sharpener body is provided with only one pencil inlet, and pencils with two conical points with different sizes, which are suitable for common pencils required by writing and sketch pens required by sketch use, can be shaved by simply selecting and adjusting, so that the purpose of one machine for two purposes is realized.

The above-described embodiments of the present invention should not be construed as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. made within the spirit of the present invention should be included in the scope of the claims of the present invention.