CN210881480U

CN210881480U - Adjustable pencil sharpener capable of polishing pencil point

Info

Publication number: CN210881480U
Application number: CN201921795271.5U
Authority: CN
Inventors: 钟倩
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-10-24
Filing date: 2019-10-24
Publication date: 2020-06-30
Anticipated expiration: 2029-10-24

Abstract

The utility model provides an adjustable pencil sharpener capable of sharpening penpoint, which comprises a shell, a flock storage box arranged at the bottom of the shell, a knife rest, a rotating handle, a rotating rod, a slide block, a fixed bridge frame and a grinding block; the tool rest is provided with a track, and the sliding block is arranged in the track in a sliding manner; the fixed bridge is parallel to the transverse strips of the sliding block and is arranged on the track of the tool rest, bridge columns at two ends of the fixed bridge are respectively and fixedly connected to the edges of the other two sides of the track, and the vertical strips of the sliding block penetrate through the bottom of the fixed bridge; the grinding blocks are arranged on the transverse strips of the sliding block. Rotate the rotary rod and make slider and abrasive brick remove jointly in the track, make the abrasive brick aim at the pencil draw-in groove, can finely tune the position on rotary rod selection nib contact abrasive brick top slope and polish, can polish out the nib of equidimension not, make the nib of cutting out be oval, when the abrasive brick moves away, make the nib support the side plane of fixed crane span structure, keep the original function of penknife, and fixed crane span structure prevents that the slider from too not hard up and droing.

Description

Adjustable pencil sharpener capable of polishing pencil point

Technical Field

The utility model relates to a penknife field, concretely relates to regulation formula penknife of nib can polish.

Background

In the current market, the pencil point planed by the pencil sharpener is relatively fine but is easy to break, while the pencil point planed by the existing pencil sharpener is also ground to be thick and not easy to break, but the structure is relatively complex, the cost is relatively high, the function is relatively single, and the relatively fine or thick pencil point cannot be selected according to the requirement.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that to prior art not enough, provide a regulation formula penknife of nib that can polish.

The utility model provides an above-mentioned technical problem's technical scheme as follows: a regulation type pencil sharpener capable of polishing a pencil point comprises a shell, a flock storage box arranged at the bottom of the shell, a knife rest arranged in the shell, a gear and a rotary knife arranged on the knife rest, a rotary handle arranged outside the shell, and a rotary rod, wherein the rotary rod sequentially penetrates through the rotary handle, the shell and the knife rest from outside to inside, the rotary handle is used for connecting the rotary rod and the knife rest into a whole, the rotary handle is in threaded connection with a port at the front end of the knife rest and drives the knife rest to rotate axially together, a pencil clamping groove used for clamping a pencil is arranged at the tail end of the knife rest,

the pen point polishing device also comprises a sliding block, a fixed bridge and a grinding block for polishing the pen point; the tool rest is positioned between the pencil clamping groove and the rotating handle, a rectangular groove type track is arranged on the tool rest, the groove bottom of the pencil clamping groove is communicated with the track, the sliding block comprises a vertical strip and two opposite transverse strips, two ends of the vertical strip are respectively and fixedly connected to the middle parts of the two transverse strips to form an I-shaped block structure, the sliding block is arranged in the track in a sliding mode, and the two transverse strips of the sliding block are perpendicular to the pencil rod and are respectively attached to the edges of two sides of the track; the fixed bridge is of a half-frame bridge structure, the fixed bridge is parallel to the transverse strips of the sliding block and is arranged on the track of the tool rest, bridge columns at two ends of the fixed bridge are respectively and fixedly connected to the edges of the other two sides of the track, and the vertical strips of the sliding block penetrate through the bottom of the fixed bridge; the grinding block is arranged on one side, close to the pencil clamping groove, of the sliding block on the transverse strip.

The utility model has the advantages that: the rotating rod is rotated to enable the sliding block and the grinding block to move together in the track, the grinding block is aligned to the bottom of the pencil clamping groove, the rotating rod can be finely adjusted to select the position of a pen point, which is in contact with the slope at the top end of the grinding block, so that the pen point can be ground while the pencil is cut, pen points with different sizes can be ground, the cut pen points are oval, the pencil is smooth, paper cannot be scratched, correction is convenient, and the probability of pencil breakage is reduced; when the rotating rod is rotated to move the grinding block away, the pen point abuts against the side plane of the fixed bridge frame, the original function of the pencil sharpener is kept, and the fixed bridge frame prevents the sliding block from being too loose and falling off.

On the basis of the technical scheme, the utility model discloses can also do following improvement.

Further, the rotary rod stretches into the tip of knife rest is equipped with the toper latch, the slider is close to the upper surface of twist grip's horizontal strip is equipped with sawtooth strip, the tip of rotary rod stretches into in the track, its toper latch with the sawtooth strip insection meshing of slider, forward rotation the rotary rod promotes the slider to orbital one side lateral shifting, and drive the abrasive brick to the pencil draw-in groove is close to, and works as the vertical strip of slider supports during the bridgepost department of fixed crane span structure one end, the abrasive brick is located the tank bottom department of pencil draw-in groove, reverse rotation the rotary rod promotes the slider to orbital opposite side lateral shifting, and drive the abrasive brick is kept away from the pencil draw-in groove.

The beneficial effect of adopting the further scheme is that: the rotating rod is rotated to drive the sliding block to move left and right in the track, so that the position of the grinding block can be adjusted, and a thinner or thicker pen point can be selected according to different requirements.

Furthermore, one side of the grinding block is provided with a slope grinding surface, and the slope grinding surface faces the bottom of the pencil clamping groove and is arranged oppositely.

The beneficial effect of adopting the further scheme is that: can polish a smoother pen point.

Further, the top end of the block narrows from side to side.

The beneficial effect of adopting the further scheme is that: the nib supports the top portion of abrasive brick, because the top of abrasive brick is by the width narrowing, selects the position that the nib contacted the abrasive brick top through fine setting twist grip, polishes for the nib of equidimension not is polished out.

Further, the slope of the slope grinding surface is 115-125 degrees.

The beneficial effect of adopting the further scheme is that: can accomplish the nib better more fast and polish.

Further, the rotary rod includes the integrated into one piece's the body of rod, the fixed preforming of circular shape and columniform handle, be equipped with on the one end lateral wall of the body of rod the toper latch, handle fixed connection be in the other end of the body of rod, fixed preforming fixed connection be in handle department, the body of rod is followed fixed preforming's center is passed, twist grip pushes down fixed preforming supports the knife rest front end port outside, just fixed preforming's diameter is greater than the handle runs through the through-hole on the twist grip, the diameter of handle is greater than the body of rod, the inside passageway that is equipped with of knife rest front end, the passageway with the track intercommunication, the body of rod is followed the port department of knife rest front end stretches into in the passageway and run through and extend to the track in, the front end of knife rest is equipped with the confession the passageway that the body of.

The beneficial effect of adopting the further scheme is that: the fixing pressing piece prevents the rotating rod from shifting.

Furthermore, regulation formula pencil sharpener still includes the separation blade, the separation blade is equipped with two, two the separation blade is vertical setting respectively in the both ends of fixed crane span structure just are close to one side of pencil draw-in groove.

The beneficial effect of adopting the further scheme is that: the blocking piece is used for blocking the cut pen scraps from falling to one side of the gear on the tool rest to influence the operation of the gear.

Further, the fixed bridge frame is fixed on the track of the tool rest through screws, two screws are arranged, the two screws are respectively located at bridge columns at two ends of the fixed bridge frame and correspond to the two screw holes formed in the track at the two ends of the fixed bridge frame, and the screws penetrate through the upper surface of the fixed bridge frame downwards from the bridge columns to the screw holes and are in threaded connection with the screw holes.

The beneficial effect of adopting the further scheme is that: the fixed bridge can be fixed on the track of the tool rest.

Further, a groove is formed in the transverse strip on one side, close to the pencil clamping groove, of the sliding block, and the grinding block is arranged in the groove.

Drawings

Fig. 1 is a schematic view of an overall structure of an adjustable pencil sharpener according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a tool holder according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a slider according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a grinding block according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a rotary rod and a fixed pressing sheet according to an embodiment of the present invention

Fig. 6 is a schematic structural view of a fixed bridge and a blocking piece according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a gear according to an embodiment of the present invention.

In the drawings, the names of the components represented by the respective symbols are as follows:

1. the pencil sharpener comprises a knife rest, 2, a rotary handle, 3, a rotary rod, 4, a sliding block, 5, a fixed bridge, 6, a grinding block, 7, a track, 8, a fixed pressing sheet, 9, a blocking sheet, 10, a screw, 11, a screw hole, 12, a channel, 13, a groove, 14, a gear, 101, a pencil clamping groove, 301, a conical clamping tooth, 302, a rod body, 303, a handle, 401, a sawtooth strip, 501, a bridge column, 601 and a slope ground surface.

Detailed Description

The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1-2, an adjustable pencil sharpener capable of sharpening a pencil point comprises a housing, a flock storage box arranged at the bottom of the housing, a pencil holder 1 arranged in the housing, a gear 14 and a drum cutter arranged on the pencil holder 1, and a rotary handle 2 arranged outside the housing, and further comprises a rotary rod 3, wherein the rotary rod 3 sequentially penetrates through the housing of the rotary handle 2 and the pencil holder 1 from outside to inside, the rotary handle 2 connects the rotary rod 3 and the pencil holder 1 into a whole, the rotary handle 2 is in threaded connection with a port at the front end of the pencil holder 1 and drives the pencil holder 1 to rotate axially together, a pencil clamping groove 101 for clamping a pencil is arranged at the tail end of the pencil holder 1,

the pen point polishing device also comprises a sliding block 4, a fixed bridge 5 and a grinding block 6 for polishing the pen point; the pencil sharpener comprises a tool rest 1, a pencil clamping groove 101, a rotating handle 2, a sliding block 4 and a tool rest base, wherein the tool rest 1 is positioned between the pencil clamping groove 101 and the rotating handle 2 and is provided with a rectangular groove type track 7, the bottom of the pencil clamping groove 101 is communicated with the track 7, the sliding block 4 comprises a vertical strip and two opposite transverse strips, two ends of the vertical strip are respectively and fixedly connected to the middle parts of the two transverse strips to form an I-shaped block-shaped structure, the sliding block 4 is arranged in the track 7 in a sliding mode, and the two transverse strips of the sliding block 4 are perpendicular to a pencil rod and are respectively attached; the fixed bridge frame 5 is a half-frame bridge structure, the fixed bridge frame 5 is parallel to the transverse strips of the sliding block 4 and is arranged on the track 7 of the tool rest 1, bridge columns 501 at two ends of the fixed bridge frame 5 are respectively and fixedly connected to the edges of the other two sides of the track 7, and the vertical strips of the sliding block 4 penetrate through the bottom of the fixed bridge frame 5; the grinding block 6 is arranged on one side, close to the pencil clamping groove 101, of the sliding block 4, on the transverse strip.

Specifically, when the groove on the slider aligns the position of the pencil rod to the middle of the strip, the pencil point abuts against the narrow side of the top end of the grinding block, the rotating handle 2 is rotated in the positive direction, and when the vertical strip abuts against the bridge column 501, the pencil point abuts against the thick side of the top end of the grinding block, otherwise, the pencil point abuts against the side plane of the bridge.

Specifically, the surface of the rotating handle 2 is printed with a schematic arrow, and thick and thin characters are marked on the left side and the right side of the schematic arrow respectively.

It should be understood that the deck of said fixed bridge 5 has a certain thickness.

In the embodiment, the rotating rod 3 is rotated to enable the sliding block 4 and the grinding block 6 to move together in the track 7, so that the grinding block 6 is aligned with the pencil clamping groove 101, the rotating rod 3 can be finely adjusted to select the position where the pen point contacts the slope at the top end of the grinding block 6 for grinding, the pen points with different sizes can be ground, the ground pen points are oval, the ground pen points are smooth, the book is not damaged, the correction is convenient, and the probability of pen breakage is reduced; when the rotating rod 3 is rotated to move the grinding block 6 away, the pen point props against the side plane of the fixed bridge frame 5, the original function of the pencil sharpener is kept, and the fixed bridge frame 5 prevents the sliding block from being too loose and falling off.

Alternatively, as an embodiment of the present invention, as shown in fig. 3, the end of the rotary rod 3 extending into the tool holder 1 is provided with a tapered latch 301, the upper surface of the slider 4 close to the transverse bar of the rotating handle 2 is provided with a sawtooth bar 401, the end of the rotating rod 3 extends into the track 7, the tapered latch 301 of the rotating rod 3 is meshed with the sawtooth pattern of the sawtooth rack 401 of the sliding block 4, the rotating rod 3 is positively rotated to push the sliding block 4 to transversely move towards one side of the track 7, and drives the grinding block 6 to approach the pencil clamping groove 101, when the vertical strip of the sliding block 4 is abutted against the bridge column at one end of the fixed bridge 5, the abrasive brick 6 is located the tank bottom department of pencil draw-in groove 101, counter-rotation the rotary rod 3 promotes slider 4 to the opposite side lateral shifting of track 7, and drive abrasive brick 6 keeps away from pencil draw-in groove 101.

It should be understood that "away" refers to a condition where the block 6 is completely clear of the pencil pocket 101.

Specifically, the rotary rod 3 is rotated to enable the latch 301 to be meshed with the sawtooth rack 401, so that the sliding block 4 and the grinding block 6 move together in a track, the grinding block 6 is aligned with the bottom of the pencil clamping groove 101, the rotary rod 3 can be finely adjusted to select the position where a pen point contacts with the slope at the top end of the grinding block 6 to be ground, the pen point is ground while the pencil is cut, pen points with different sizes can be ground, the cut pen points are oval, smoothness is realized, paper cannot be scratched, correction is convenient, and the probability of pen breakage is reduced; when the rotating rod 3 is rotated to move the grinding block 6 away, the pen point props against the side plane of the fixed bridge frame 5, the original function of the pencil sharpener is kept, and the fixed bridge frame 5 prevents the sliding block from being too loose and falling off.

Twist grip 2 is fixed with knife rest 1, twist grip 2 drives 1 axial of knife rest and rotates, the gear 14 that is used for sharpening a pen on the knife rest 1 rotates axially jointly, just can realize the function of sharpening a pen, and a grinding block 6 has been set up, grinding block 6 is fixed on slider 4, when rotary rod 3 rotates, the sawtooth rack that passes through on the slider 4 promotes slider 4 and transversely controls in the track and remove, adjust the position that grinding block 6 and pencil draw-in groove 101 tank bottom are relative, make the nib support on grinding block 6 is domatic, the nib of polishing, grinding block 6 is not axial pivoted. That is, the position of the slider 4 needs to be manually adjusted, and then the rotating handle 2 is rotated to rotate the entire blade holder 1.

In the above embodiment, the rotating rod 3 is rotated to drive the sliding block 4 to move left and right in the track 7, so that the position of the grinding block 6 can be adjusted, and a thinner pen point or a thicker pen point can be selected according to different requirements.

Optionally, as an embodiment of the present invention, as shown in fig. 4, one surface of the grinding block 6 is provided with a trapezoidal slope grinding surface 601, and the slope grinding surface 601 faces the bottom of the pencil clamping groove 101.

Specifically, the top end of the grinding block 6 is tightly attached to the roller blade, and therefore, a slope corresponding to the roller blade is arranged on the surface, tightly attached to the roller blade, of the top end of the grinding block 6.

In particular, the material selected for the grinding block 6 is a material in which wear-resistant fine particles can be combined with a binder.

In the above embodiment, a relatively smooth nib can be ground.

Alternatively, as an embodiment of the present invention, the top end of the grinding block 6 is narrowed from width from one side to the other side.

It will be appreciated that the finely adjustable rotary lever 3 selects the position of the point of contact with the slope of the top end of the block 6 against which the tip of the pencil is pressed, the top end being narrower and wider, i.e. the point of the pencil is pressed against the wider side and the ground nib is thicker, whereas the point of the pencil is pressed against the narrower side and the ground nib is thinner.

In the above embodiment, the pen point is pressed against the top end part of the grinding block 6, and since the top end of the grinding block 6 is narrowed, the position of the pen point contacting the top end of the grinding block 6 is selected by finely adjusting the rotary handle, so that the pen points with different sizes are ground.

Optionally, as an embodiment of the present invention, the slope of the slope grinding surface 601 is 115 ° to 125 °.

Above-mentioned embodiment, can accomplish the nib better more fast and polish.

Optionally, as an embodiment of the present invention, as shown in fig. 5, the rotating rod 3 includes an integrally formed rod body 302, a circular fixed pressing plate 8 and a cylindrical handle 303, the tapered latch 301 is disposed on a side wall of one end of the rod body 302, the handle 303 is fixedly connected to the other end of the rod body 302, the fixed pressing plate 8 is fixedly connected to the handle 303, the rod body 302 passes through the center of the fixed pressing plate 8, the rotating handle 2 presses the fixed pressing plate 8 against the outside of the front end port of the tool holder, the diameter of the fixed pressing plate 8 is larger than the through hole of the handle 303 penetrating through the rotating handle 2, the diameter of the handle 303 is larger than the rod body 302, a channel 12 is disposed inside the front end of the tool holder 1, the channel 12 is communicated with the track 7, the rod body 302 extends into the channel 12 from the front end port of the tool holder 1 and extends into the track 7, the front end of the tool holder 1 is provided with a channel 12 into which the rod body 302 extends.

Specifically, the handle 303 is provided with a plurality of stripe teeth, and the plurality of stripe teeth are axially arranged at equal intervals.

In the above embodiment, the fixing pressure piece 8 prevents the rotating rod 3 from being displaced.

Optionally, as an embodiment of the present invention, as shown in fig. 6, the adjustable pencil sharpener further includes two or two separation blades 9, where the separation blades 9 are respectively vertically disposed at two ends of the fixed bridge 5 and close to one side of the pencil clamping groove 101.

In the above embodiment, the blocking piece blocks the cut pen scraps from falling to one side of the gear on the cutter frame, so that the operation of the gear is influenced.

Optionally, as an embodiment of the present invention, as shown in fig. 6, the fixed bridge 5 is fixed on the rail 7 of the tool holder 1 by screws 10, the number of the screws 10 is two, two of the screws 10 are respectively located at the bridge posts at two ends of the fixed bridge 5, corresponding to two of the screws, screw holes 11 are provided on the rail 7, and the screws 10 pass through the bridge posts from the upper surface of the fixed bridge 5 to the screw holes 11 and are in threaded connection with the screw holes 11.

In the above described embodiment, the fixed bridge 5 can be fixed on the rails 7 of the tool holder 1.

Optionally, as an embodiment of the utility model, the slider 4 is close to be equipped with recess 13 on the horizontal strip of pencil draw-in groove 101 one side, the setting of abrasive brick 6 is in the recess 13.

It will be appreciated that the grooves 13 can be provided on either side of the transverse bar, and that the size of the top end surface of the block 6 will change direction due to the change in the position of the grooves 13.

In particular, the block 6 is glued in a groove 13 on the slide 4.

In particular, as shown in fig. 7, the gear 14 is conical, the function of the cone being to avoid the gear 14 colliding with the conical latch 301 and the face of the top end of the bridge 5 when the sharpener is turned.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A regulation type pencil sharpener capable of grinding a pencil point comprises a shell, a flock storage box arranged at the bottom of the shell, a knife rest (1) arranged in the shell, a gear (14) and a roller knife arranged on the knife rest (1), a rotary handle (2) arranged on the outer side of the shell, and a rotary rod (3), wherein the rotary rod (3) sequentially penetrates through the rotary handle (2), the shell and the knife rest (1) from outside to inside, the rotary handle (2) connects the rotary rod (3) and the knife rest (1) into a whole, the rotary handle (2) is in threaded connection with a port at the front end of the knife rest (1) and drives the knife rest (1) to rotate axially together, a pencil clamping groove (101) for clamping a pencil is arranged at the tail end of the knife rest (1), and the regulation type pencil sharpener is characterized in that,

the pen point polishing device also comprises a sliding block (4), a fixed bridge (5) and a grinding block (6) for polishing the pen point; the pencil sharpener is characterized in that a rectangular groove type track (7) is arranged on the tool rest (1) between the pencil clamping groove (101) and the rotating handle (2), the bottom of the pencil clamping groove (101) is communicated with the track (7), the sliding block (4) comprises a vertical strip and two opposite transverse strips, two ends of the vertical strip are fixedly connected to the middle of the two transverse strips respectively to form an I-shaped block structure, the sliding block (4) is arranged in the track (7) in a sliding mode, and the two transverse strips of the sliding block (4) are perpendicular to a pencil rod and are attached to the edges of two sides of the track (7) respectively; the fixed bridge frame (5) is of a half-frame bridge structure, the fixed bridge frame (5) is parallel to the transverse strips of the sliding block (4) and is arranged on the track (7) of the tool rest (1), bridge columns (501) at two ends of the fixed bridge frame (5) are respectively and fixedly connected to the edges of the other two sides of the track (7), and the vertical strips of the sliding block (4) penetrate through the bottom of the fixed bridge frame (5); the grinding block (6) is arranged on one side, close to the pencil clamping groove (101), of the sliding block (4) on the transverse strip.

2. The adjustable pencil sharpener capable of sharpening the pen point as claimed in claim 1, wherein the end of the rotary rod (3) extending into the tool rest (1) is provided with a tapered latch (301), the upper surface of the slider (4) close to the transverse strip of the rotary handle (2) is provided with a sawtooth strip (401), the end of the rotary rod (3) extends into the track (7), the tapered latch (301) thereof is meshed with the sawtooth strip (401) of the slider (4), the rotary rod (3) is rotated forward to push the slider (4) to move transversely to one side of the track (7) and drive the grinding block (6) to approach the pencil slot (101), and when the vertical strip of the slider (4) abuts against the bridge pillar at one end of the fixed bridge (5), the grinding block (6) is located at the groove bottom of the pencil slot (101), the rotating rod (3) is rotated reversely to push the sliding block (4) to move transversely to the other side of the track (7), and the grinding block (6) is driven to be far away from the pencil clamping groove (101).

3. The adjustable pencil sharpener capable of sharpening the pencil point as defined in claim 2 wherein one side of said grinding block (6) is provided with a sloped grinding surface (601), said sloped grinding surface (601) being disposed facing the bottom of said pencil slot (101).

4. The adjustable sharpener of claim 3 where the top end of the block (6) narrows from side to side.

5. The adjustable sharpener of claim 3 where the slope of the ramped sharpening surface (601) is between 115 ° and 125 °.

6. The adjustable pencil sharpener capable of sharpening the pencil point as defined in claim 2, wherein the rotary rod (3) comprises an integrally formed rod body (302), a circular fixed pressing plate (8) and a cylindrical handle (303), the tapered latch (301) is arranged on one end side wall of the rod body (302), the handle (303) is fixedly connected to the other end of the rod body (302), the fixed pressing plate (8) is fixedly connected to the handle (303), the rod body (302) penetrates through the center of the fixed pressing plate (8), the rotary handle (2) presses the fixed pressing plate (8) against the outer side of the front end port of the tool holder, the diameter of the fixed pressing plate (8) is larger than that of the handle (303) penetrating through a through hole in the rotary handle (2), and the diameter of the handle (303) is larger than that of the rod body (302), the inside passageway (12) that is equipped with of knife rest (1) front end, passageway (12) with track (7) intercommunication, the body of rod (302) is followed the port department of knife rest (1) front end stretches into in passageway (12) and run through and extend to in track (7), the front end of knife rest (1) is equipped with the confession the passageway (12) that the body of rod (302) stretched into.

7. The adjustable pencil sharpener capable of sharpening the pencil point as defined in any one of claims 1 to 6, wherein said adjustable pencil sharpener further comprises two blocking pieces (9), said two blocking pieces (9) are vertically disposed at two ends of said fixed bridge (5) and close to one side of said pencil clamping slot (101).

8. The adjustable pencil sharpener capable of sharpening the pencil point as recited in any one of claims 1 to 6, wherein said fixed bridge (5) is fixed on the rail (7) of said tool rest (1) by screws (10), said screws (10) are provided in two numbers, two of said screws (10) are respectively located at the bridge posts at both ends of said fixed bridge (5), screw holes (11) are provided on said rail (7) corresponding to said two screws, said screws (10) are passed through said bridge posts from the upper surface of said fixed bridge (5) downward to said screw holes (11) and are in threaded connection with said screw holes (11).

9. The adjustable pencil sharpener capable of sharpening the pencil point as defined in any one of claims 1 to 6, wherein a groove (13) is formed in the transverse strip of the slider (4) on the side close to the pencil groove (101), and the sharpening block (6) is arranged in the groove (13).

10. The adjustable sharpener capable of sharpening the pen tip as defined in any one of claims 1 to 6 wherein said gear (14) is of a conical configuration.