Pencil Sharpener

Abstract

The invention discloses a pencil sharpener, comprising a housing (1), a cutting assembly (2) and a pen tip thickness adjustment assembly, wherein the cutting assembly (2) is mounted on the housing (1); the pen tip thickness adjustment assembly comprises a sliding member that slides axially and can abut against the pen tip, an adjustment member that adjusts the axial position of the sliding member, and an elastic member (3) that prevents the sliding member and the adjustment member from being relatively close; a portion of the sliding member is slidably matched with the adjustment member, and another portion of the sliding member is slidably matched with the cutting assembly (2); the adjustment member is connected to the cutting assembly (2); the elastic member (3) is axially arranged between the sliding member and the adjustment member; and the sliding member can also abut against the adjustment member. The pencil sharpener can cut pen tips of different thicknesses and ensure normal cutting.

Description

Technical Field

[0001] The invention relates to the technical field of stationery, in particular to a pencil sharpener. Background Art

[0002] A pencil sharpener is a commonly used tool for sharpening pencils, and is popular among students because of its convenience and cleanliness.

[0003] Many pencil sharpeners currently on the market have a pen tip thickness adjustment component, which can be operated to allow the pencil sharpener to sharpen pencil tips of different thicknesses. For example, the website of the State Intellectual Property Office of China discloses a pencil tip thickness adjustment mechanism for a pencil sharpener, which drives the adjustment rod to move axially by rotating the push rod, thereby limiting the depth of the pen tip inserted into the tool holder and achieving the thickness adjustment of the pen tip. Although the pencil sharpener can cut pencils with different thicknesses of pen tips, the hard contact between the pencil tip and the end of the adjustment rod during cutting, especially during fast cutting, can easily break the pen tip, resulting in waste of pencils and reducing the user experience. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a pencil sharpener which can cut pen tips of different thicknesses and can ensure normal cutting.

[0005] The technical solution of the present invention is to provide a pencil sharpener, including a shell, a cutting assembly and a pen tip thickness adjustment assembly, wherein the cutting assembly is installed on the shell; the pen tip thickness adjustment assembly includes a sliding member that slides axially and can abut against the pen tip, an adjusting member that adjusts the axial position of the sliding member, and an elastic member that prevents the sliding member and the adjusting member from being relatively close; a part of the sliding member is slidably matched with the adjusting member, and another part of the sliding member is slidably matched with the cutting assembly; the adjusting member is connected to the cutting assembly; the elastic member is axially arranged between the sliding member and the adjusting member; and the sliding member can also abut against the adjusting member.

[0006] The adjusting member comprises an adjusting button and an adjusting button fixing frame, wherein the adjusting button fixing frame is connected with the cutting assembly; and the adjusting button is rotatably connected with the adjusting button fixing frame.

[0007] A first axial through hole is provided on the adjusting button fixing frame, and a part of the sliding member is slidably fitted in the first axial through hole; at least one first protrusion is provided at one end of the sliding member, and a plurality of second protrusions with different axial heights and capable of respectively abutting against the first protrusions are provided in the adjusting button, and the second protrusions are arranged circumferentially.

[0008] The axial heights of the plurality of circumferentially arranged second protrusions increase sequentially.

[0009] The pencil sharpener also includes an elastic rotation frustration device, which includes at least one elastic protrusion and a plurality of grooves matched with the elastic protrusion respectively arranged on the adjusting button and the adjusting button fixing frame, and at least one elastic protrusion is slidably fitted in the groove.

[0010] The elastic rotation frustration device also includes at least one fixing protrusion and an arc groove matched with the fixing protrusion, which are respectively arranged on the adjusting button and the adjusting button fixing frame, and at least one fixing protrusion is slidably matched in the arc groove.

[0011] One end of the elastic member abuts against the inner end surface of the regulating button, and the other end of the elastic member abuts against one end of the sliding member; the elastic member is arranged on the outer edge or the inner edge of the plurality of second protrusions.

[0012] A protrusion is arranged on the outer surface of the adjusting button.

[0013] The sliding part includes a sliding rod, a second axial through hole is provided in the cutting assembly, and the first axial through hole is connected to the second axial through hole; the sliding rod is slidably fitted in the first axial through hole and the second axial through hole; a circumferential limit device is provided on the sliding rod and the first axial through hole or on the sliding rod and the second axial through hole.

[0014] The sliding part also includes a pen tip stopper, which is slidably matched on the cutting assembly; the sliding direction connection line of the pen tip stopper forms an acute angle with the extension line of the pen core axis; one end of the sliding rod abuts against the elastic part, and the other end of the sliding rod can abut against the pen tip stopper.

[0015] After adopting the above structure, the present invention has the following advantages compared with the prior art:

[0016] The pencil sharpener of the present invention can adjust the axial position of the sliding member through the adjusting member, so that the sliding member slides to adjust the position of the pen tip deep into the cutting assembly, thereby realizing the thickness adjustment of the pen tip. And because there is an elastic member between the adjusting member and the sliding member, the pen tip and the sliding member are in flexible contact, so that different thicknesses of pen tips can be cut while ensuring that the pen tip is not easy to break, thereby avoiding the waste of pencils and improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial cross-sectional view of a pencil sharpener of the present invention.

[0018] Figure 2 It is a half-section view of the pencil sharpener of the present invention (without the housing).

[0019] Figure 3 It is an exploded view of the pencil sharpener of the present invention in the first position (without the housing).

[0020] Figure 4 It is an exploded view of the pencil sharpener of the present invention in the second position (without the housing).

[0021] Figure 5 It is a schematic diagram of the tool holder.

[0022] Figure 6 This is an exploded view of the adjusting part in the first position.

[0023] Figure 7 This is an exploded view of the second position of the adjustment part.

[0024] As shown in the figure, 1. shell, 2. cutting assembly, 2.1. tool holder, 2.11. support frame, 2.12. tool, 2.2. gear part, 2.3. rocker arm, 3. elastic part, 4. adjusting button, 5. adjusting button fixing frame, 6. first axial through hole, 7. first protrusion, 8. second protrusion, 9. elastic protrusion, 10. groove, 11. fixed protrusion, 12. arc groove, 13. protrusion, 14. sliding rod, 15. second axial through hole, 16. pen tip stopper, 17. pencil hole, 18. pencil, 19. annular part, 20. cylindrical groove, 21. slider, 22. slide groove, 23. undercut, 24. columnar part, 25. sheet part, 26. sheet hole, 27. columnar hole, 28. extension line, 29. sliding direction connecting line. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0026] like Figure 1 , Figure 2 , Figure 3 , Figure 4 As shown, a pencil sharpener of the present invention comprises a housing 1, a cutting assembly 2 and a pen tip thickness adjustment assembly, wherein the cutting assembly 2 is mounted on the housing 1; a pencil hole 17 is provided on the housing 1, and a pencil 18 passes through the pencil hole 17 and enters the cutting assembly 2; the cutting assembly 2 comprises a tool holder 2.1, a gear member 2.2 and a rocker arm 2.3, wherein the gear member 2.2 is rotatably connected to the housing 1; the tool holder 2.1 comprises a support frame 2.11 and a tool 2.12, wherein one side of the support frame 2.11 is fixed to one side of the gear member 2.2, and the other side of the support frame 2.11 is connected to the housing 1; the tool 2.12 is rotatably connected to the support frame 2.11, and the tool 2.12 is also meshed with the gear member 2.2, and the tool 2.12 is driven to rotate by the gear member 2.2; the rocker arm 2.3 is connected to the other side of the gear member 2.2.

[0027] The pen tip thickness adjustment assembly includes a sliding member that slides axially and can abut against the pen tip, an adjusting member that adjusts the axial position of the sliding member, and an elastic member 3 that prevents the sliding member and the adjusting member from being relatively close; a part of the sliding member is slidably matched with the adjusting member, and another part of the sliding member is slidably matched with the cutting assembly 2; the adjusting member is connected to the cutting assembly 2; the elastic member 3 is axially arranged between the sliding member and the adjusting member; the sliding member can also abut against the adjusting member.

[0028] The adjusting member includes an adjusting button 4 and an adjusting button fixing frame 5. The adjusting button fixing frame 5 is connected to the cutting assembly 2. In this embodiment, the adjusting button fixing frame 5 and the cutting assembly 2 are buckled. The adjusting button 4 is rotatably connected to the adjusting button fixing frame 5. There is a circular ring member 19 on the adjusting button fixing frame 5. The adjusting button 4 has a cylindrical groove 20 that matches the size and shape of the circular ring member 19. The circular ring member 19 rotates in the cylindrical groove 20. The adjusting member can also be a switch with multiple different strokes, and the sliding member is driven to different positions by alternately pressing multiple switches. There is an undercut 23 on the adjusting button fixing frame 5, which matches the groove in the adjusting button 4 (not shown in the figure) to form an axial limit for the adjusting button 4.

[0029] like Figure 6 , Figure 7 As shown, a first axial through hole 6 is provided on the adjusting button fixing frame 5, and a part of the sliding member is slidably fitted in the first axial through hole 6; at least one first protrusion 7 is provided at one end of the sliding member, and a plurality of second protrusions 8 with different axial heights and capable of respectively abutting against the first protrusions 7 are provided in the adjusting button 4, and the second protrusions 8 are arranged circumferentially, that is, the plurality of second protrusions 8 are surrounded in a circle; that is, the plurality of second protrusions 8 form a plurality of step surfaces. In this embodiment, there are two first protrusions 7, and the two first protrusions 7 are symmetrically arranged. The plurality of second protrusions 8 are divided into two groups, one of which is for one of the first protrusions 7 to abut against, and the other group is for another first protrusion 7 to abut against. It is also possible that at least one first protrusion 7 is provided at one end of the sliding member, and a spiral surface (not shown in the figure) with a spirally rising axial height and capable of abutting against the first protrusion 7 is provided in the adjusting button 4.

[0030] The axial heights of the plurality of circumferentially arranged second protrusions 8 increase sequentially.

[0031] The pencil sharpener also includes an elastic rotation frustration device, which includes at least one elastic protrusion 9 and a plurality of grooves 10 matching the elastic protrusion 9, which are respectively arranged on the adjusting button 4 and the adjusting button fixing frame 5. In this embodiment, the elastic protrusion 9 is arranged on the outer circumferential surface of the adjusting button fixing frame 5, and the groove 10 is arranged on the inner circumferential surface of the adjusting button 4, and at least one elastic protrusion 9 is slidably fitted in the groove 10.

[0032] The elastic rotation frustration device also includes at least one fixed protrusion 11 and an arc-shaped groove 12 matching the fixed protrusion 11, which are respectively arranged on the adjusting button 4 and the adjusting button fixing frame 5. In this embodiment, the fixed protrusion 11 is arranged on the outer circular surface of the adjusting button fixing frame 5, and the arc-shaped groove 12 is arranged on the inner circular surface of the adjusting button 4, and at least one fixed protrusion 11 is slidably fitted in the arc-shaped groove 12.

[0033] One end of the elastic member 3 abuts against the inner end surface of the adjusting button 4, and the other end of the elastic member 3 abuts against one end of the sliding member; the elastic member 3 is arranged at the outer edge or inner edge of the plurality of second protrusions 8, that is, the elastic member 3 does not interfere with the first protrusion 7 and the second protrusion 8. In this embodiment, the elastic member 3 is a spring, and may also be other elastic members such as hydraulic or air.

[0034] A protrusion 13 is provided on the outer surface of the adjustment button 4 to facilitate the user to identify the adjustment position.

[0035] The sliding member includes a sliding rod 14, a second axial through hole 15 is provided in the cutting assembly 2, and the first axial through hole 6 is connected to the second axial through hole 15; the sliding rod 14 is slidably fitted in the first axial through hole 6 and the second axial through hole 15; in the present embodiment, the sliding rod 14 is composed of two parts, the first part is a cylindrical member 24, wherein the cylindrical member 24 includes a large cylindrical member and a small cylindrical member, the large cylindrical member is slidably fitted in the first axial through hole 6, and the small cylindrical member is slidably fitted in the second axial through hole 15; the second part is a sheet member 25, and the second axial through hole 15 is divided into two parts, the first part is a cylindrical hole 27 for sliding of the cylindrical member 24, and the second part is a sheet hole 26 for sliding of the sheet member 25, and the inner end surface of the sheet hole 26 and the adjusting button 4 form an axial limit for the sliding member.

[0036] A circumferential limiting device is provided on the sliding rod 14 and the first axial through hole 6 or on the sliding rod 14 and the second axial through hole 15, that is, a circumferential limiting device is provided on the sliding rod 14 and the first axial through hole 6, or a circumferential limiting device is provided on the sliding rod 14 and the second axial through hole 15. In this embodiment, the circumferential limiting device includes a slider 21 provided in the second axial through hole 15 and a slide groove 22 provided on the outer circumferential surface of the sliding rod 14, and the slider 21 is slidably fitted in the slide groove 22.

[0037] The sliding member also includes a nib stopper 16, which is slidably fitted on the cutting assembly 2, and the two sides of the nib stopper 16 are hooked on the support frame 2.11 of the cutting assembly 2, and the support frame 2.11 forms a limit on both sides of the nib stopper 16; Figure 5 As shown, the sliding direction connecting line 29 of the pen tip stopper 16 forms an acute angle with the extension line 28 of the pen core axis, which is generally about 6 degrees, or an obtuse angle, and the two together form 180 degrees; one end of the sliding rod 14 abuts against the elastic member 3, and the other end of the sliding rod 14 can abut against the pen tip stopper 16.

[0038] When in use, the adjusting knob 4 is first rotated so that the first protrusion 7 abuts against one of the plurality of second protrusions 8. At this time, because the first protrusion 7 and the second protrusion 8 are not in contact with each other under the action of the elastic member 3, the second protrusion 7 and the second protrusion 8 will not interfere with each other in the circumferential direction.

[0039] Then, the pencil 18 is inserted into the pencil sharpener, at which time the pencil tip does not contact the pencil tip stopper 16, and then the swing arm 2.3 is rotated to cut the pencil until the pencil tip contacts the pencil tip stopper 16, and the action of the elastic member 3 is overcome so that the first protrusion 7 and the second protrusion 8 contact, so that the pencil tip is fixed, and the pencil sharpener runs idle, and the pencil 18 can be taken out at this time. After the pencil 18 is taken out, under the action of the elastic member 3, it returns to the initial state, and the first protrusion 7 and the second protrusion 8 are separated.

[0040] The above description is only for the best embodiment of the present invention, which should not be understood as limiting the claims. All changes made within the protection scope of the independent claims of the present invention are within the protection scope of the present invention.

Claims

1. A pencil sharpener, comprising a housing (1), a cutting assembly (2) and a pen tip thickness adjustment assembly, wherein the cutting assembly (2) is mounted on the housing (1); characterized in that: The pen tip thickness adjustment component comprises a sliding member that slides axially and can abut against the pen tip, an adjusting member that adjusts the axial position of the sliding member, and an elastic member (3) that prevents the sliding member and the adjusting member from being relatively close to each other; a part of the sliding member is slidably matched with the adjusting member, and another part of the sliding member is slidably matched with the cutting component (2); the adjusting member is connected to the cutting component (2); the elastic member (3) is axially arranged between the sliding member and the adjusting member; and the sliding member can also abut against the adjusting member.

2. The pencil sharpener according to claim 1, characterized in that The adjusting member comprises an adjusting button (4) and an adjusting button fixing frame (5), wherein the adjusting button fixing frame (5) is connected to the cutting assembly (2); and the adjusting button (4) is rotatably connected to the adjusting button fixing frame (5).

3. The pencil sharpener according to claim 2, characterized in that The adjusting button fixing frame (5) is provided with a first axial through hole (6), and a part of the sliding member is slidably fitted in the first axial through hole (6); at least one first protrusion (7) is provided at one end of the sliding member, and a plurality of second protrusions (8) with different axial heights and capable of respectively abutting against the first protrusions (7) are provided in the adjusting button (4), and the second protrusions (8) are arranged circumferentially.

4. The pencil sharpener according to claim 3, characterized in that The axial heights of the plurality of circumferentially arranged second protrusions (8) increase sequentially.

5. The pencil sharpener according to claim 2, characterized in that The pencil sharpener further comprises an elastic rotation frustration device, the elastic rotation frustration device comprising at least one elastic protrusion (9) and a plurality of grooves (10) respectively arranged on the adjusting button (4) and the adjusting button fixing frame (5), and matching with the elastic protrusion (9), wherein the at least one elastic protrusion (9) is slidably fitted in the groove (10).

6. The pencil sharpener according to claim 5, characterized in that The elastic rotation frustration device further comprises at least one fixing protrusion (11) and an arc-shaped groove (12) matched with the fixing protrusion (11), which are respectively arranged on the adjusting button (4) and the adjusting button fixing frame (5); the at least one fixing protrusion (11) is slidably fitted in the arc-shaped groove (12).

7. The pencil sharpener according to claim 3, characterized in that One end of the elastic member (3) abuts against the inner end surface of the adjusting button (4), and the other end of the elastic member (3) abuts against one end of the sliding member; the elastic member (3) is arranged on the outer edge or the inner edge of the plurality of second protrusions (8).

8. The pencil sharpener according to claim 2, characterized in that A protrusion (13) is provided on the outer surface of the adjusting button (4).

9. The pencil sharpener according to claim 3, characterized in that : The sliding member comprises a sliding rod (14), a second axial through hole (15) is provided in the cutting assembly (2), and the first axial through hole (6) is connected to the second axial through hole (15); The sliding rod (14) is slidably fitted in the first axial through hole (6) and the second axial through hole (15); a circumferential limiting device is provided on the sliding rod (14) and the first axial through hole (6) or on the sliding rod (14) and the second axial through hole (15).

10. The pencil sharpener according to claim 9, characterized in that The sliding member also includes a pen tip stopper (16), and the pen tip stopper (16) is slidably fitted on the cutting assembly (2); a sliding direction connecting line (29) of the pen tip stopper (16) and an extension line (28) of the pen core axis form an acute angle; one end of the sliding rod (14) abuts against the elastic member (3), and the other end of the sliding rod (14) can abut against the pen tip stopper (16).

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