A pen tip thickness adjustment mechanism and pencil sharpener

Abstract

The utility model provides a pen tip thickness adjustment mechanism and a pencil sharpener, the pen tip thickness adjustment mechanism comprises: a movable rod, having a first abutting rod and a second abutting rod respectively arranged at two ends thereof, the first abutting rod being arranged adjacent to a knob, and the second abutting rod being used to abut against the pen tip; a knob being rotatably mounted on a pencil sharpener body, having a gear adjustment portion extending inside the pencil sharpener body, the gear adjustment portion having a driving surface arranged perpendicularly to the moving direction of the movable rod, the driving surface having a plurality of steps arranged in sequence around the rotation center of the knob and having different heights, each step being provided with a positioning groove abutting against the first abutting rod, and a transition slope being provided between two adjacent steps. By rotating the knob, the plurality of steps of different heights of the gear adjustment portion abut against the first abutting rod respectively, thereby forming a plurality of gears for adjusting the pen tip thickness, the first abutting rod being able to slide relative to the transition slope, thereby switching between different steps, the above-mentioned pen tip thickness adjustment mechanism has the advantage of a simple structure.

Description

Technical Field

[0001] The utility model relates to the technical field of stationery products, in particular to a pen tip thickness adjustment mechanism and a pencil sharpener. Background Art

[0002] A pencil sharpener is a commonly used learning aid. When sharpening a pencil, one end of the pencil is inserted into the pencil sharpener, and the roller is driven to cut the pencil by manual rotation. However, the thickness of the existing pen tip is difficult to control, which is inconvenient for users to use. Utility Model Content

[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defect that the thickness of the pen tip is difficult to control in the prior art, thereby providing a pen tip thickness adjustment mechanism and a pencil sharpener that are convenient for users to use.

[0004] To this end, the utility model provides a pen tip thickness adjustment mechanism, comprising a movable rod and a knob, the movable rod being movably installed in a pencil sharpener body, and having a first abutting rod and a second abutting rod respectively arranged at two ends thereof, the first abutting rod being arranged adjacent to the knob, and the second abutting rod being used to abut against the pen tip; the knob being rotatably installed on the pencil sharpener body, having a knob rod extending out of the pencil sharpener body, and a gear adjustment portion located in the pencil sharpener body, the gear adjustment portion having a driving surface arranged perpendicularly to the moving direction of the movable rod, the driving surface having a plurality of steps arranged in sequence around the rotation center of the knob and having different heights, each of the steps being provided with a positioning groove abutting against the first abutting rod, and a transition inclined surface being provided between two adjacent steps.

[0005] The positioning groove is an arc-shaped groove, and the end surface of the first abutment rod adjacent to the positioning groove is an arc-shaped surface.

[0006] A tool holder is provided in the pencil sharpener body, and the tool holder is formed with a cavity suitable for installing the movable rod. The first abutment rod and the second abutment rod extend from both ends of the cavity respectively. A frustum is provided in the middle of the movable rod. A spring is also installed in the cavity, one end of the spring abuts against the frustum, and the other end abuts against the inner wall of the cavity adjacent to the second abutment rod.

[0007] A handle and a knob cover are installed outside the pencil sharpener body. The handle is fixed to the tool holder at one side away from the knob cover. The knob cover is formed with an installation cavity and a through hole connected to the installation cavity. The gear adjustment part is arranged in the installation cavity, and the knob rod is extended out of the through hole.

[0008] A round shaft is arranged in the middle of the driving surface, and a groove for the round shaft to penetrate into and a through hole for the first abutting rod to penetrate are arranged on the handle.

[0009] A limiting structure is provided between the knob and the handle, and the limiting structure comprises: a limiting boss provided on the outer wall of the handle; and two limiting blocks provided on both sides of the limiting boss and capable of correspondingly abutting against the limiting boss.

[0010] The knob rod is provided with an indicating arrow, and the knob cover is provided with a plurality of pen tip thickness indicating marks.

[0011] The utility model provides a pencil sharpener, comprising the above-mentioned pen tip thickness adjustment mechanism.

[0012] The technical solution of the utility model has the following advantages:

[0013] 1. The pen tip thickness adjustment mechanism provided by the utility model comprises a movable rod and a knob. The adjustment part of the knob has a driving surface arranged perpendicularly to the moving direction of the movable rod. The driving surface has a plurality of steps arranged in sequence around the rotation center of the knob and having different heights. Each step is provided with a positioning groove abutting against the first abutting rod, and a transition slope is provided between two adjacent steps. By rotating the knob, the plurality of steps of different heights of the adjustment part abut against the first abutting rod respectively, thereby forming a plurality of gears for adjusting the thickness of the pen tip. The first abutting rod can slide relative to the transition slope, thereby switching between different steps. The above-mentioned pen tip thickness adjustment mechanism has the advantage of simple structure.

[0014] 2. The pen tip thickness adjustment mechanism provided by the utility model has a positioning groove which is an arc-shaped groove, and an end surface of the first abutment rod adjacent to the positioning groove is an arc-shaped surface, so that the positioning is more accurate and it is convenient for the first abutment rod to move out of the arc-shaped groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 A three-dimensional diagram of the pen tip thickness adjustment mechanism of the utility model;

[0017] Figure 2 for Figure 1 sectional view of

[0018] Figure 3 A perspective view of the knob and the movable rod;

[0019] Figure 4 A three-dimensional diagram of the knob;

[0020] Figure 5 for Figure 1 A three-dimensional image with the knob and knob cover removed.

[0021] Explanation of the reference numerals in the accompanying drawings: 1. first abutment rod; 2. second abutment rod; 3. movable rod; 4. knob; 5. knob rod; 6. gear adjustment part; 7. driving surface; 8. step; 9. positioning groove; 10. transition slope; 11. tool holder; 12. round table; 13. spring; 14. handle; 15. knob cover; 16. through hole; 17. round shaft; 18. groove; 19. perforation; 20. limiting boss; 21. limiting block; 22. indication arrow; 23. pen tip thickness indication mark; 24. pen. DETAILED DESCRIPTION

[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0024] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0026] Example

[0027] This embodiment provides a pencil sharpener, including a pencil sharpener body, and a pen tip thickness adjustment mechanism disposed on the pencil sharpener body, such as Figure 1 and Figure 2 As shown, the pen tip thickness adjustment mechanism includes a movable rod 3, a knob 4, a knife holder 11, a handle 14 and a knob cover 15.

[0028] The movable rod 3 is movably mounted in the pencil sharpener body. Figure 2 and Figure 3 As shown, it has a first abutment rod 1 and a second abutment rod 2 respectively arranged at both ends thereof, the first abutment rod 1 is arranged adjacent to the knob 4, and the second abutment rod 2 is used to abut against the pen tip. In this embodiment, a tool holder 11 is arranged in the pencil sharpener body, and one end of the tool holder 11 is threadedly fixedly connected to the handle 14. The tool holder 11 is formed with a cavity suitable for installing the movable rod 3, and the first abutment rod 1 and the second abutment rod 2 extend from the two ends of the cavity respectively. A truncated cone 12 is arranged in the middle of the movable rod 3, and a spring 13 is also installed in the cavity, one end of the spring 13 abuts against the truncated cone 12, and the other end abuts against the inner wall of the cavity adjacent to the second abutment rod 2.

[0029] Knob 4 is rotatably mounted on the pencil sharpener body. Figure 3 and Figure 4 As shown, there is a knob rod 5 extending out of the pencil sharpener body, and a gear adjustment part 6 located in the pencil sharpener body, the gear adjustment part 6 has a driving surface 7 arranged perpendicular to the moving direction of the movable rod 3, and the driving surface 7 has a plurality of steps 8 arranged in sequence around the rotation center of the knob 4 and with different heights, each of the steps 8 is provided with a positioning groove 9 abutting against the first abutting rod 1, and a transition slope 10 is provided between two adjacent steps 8. In this embodiment, the positioning groove 9 is an arc-shaped groove, and the end surface of the first abutting rod 1 adjacent to the positioning groove 9 is an arc-shaped surface, which is convenient for positioning and ensures accurate gear positioning on the one hand, and on the other hand, the sliding fit between the arc-shaped surface and the arc-shaped groove is conducive to reducing friction and extending the service life.

[0030] The handle 14 and the knob cover 15 are installed outside the pencil sharpener body, and the side of the handle 14 away from the knob cover 15 is fixed to the tool holder 11. Figure 1 As shown, the knob cover 15 is formed with a mounting cavity and a through hole 16 communicating with the mounting cavity. The gear adjustment portion 6 is arranged in the mounting cavity, and the through hole 16 is used for the knob rod 5 to extend out. A circular shaft 17 is arranged in the middle of the driving surface 7. Figure 5 As shown, the handle 14 is provided with a groove 18 for the round shaft 17 to penetrate, and a through hole 19 for the first abutment rod 1 to penetrate. A limiting structure is provided between the knob 4 and the handle 14, such as Figure 4 and Figure 5As shown, the limiting structure includes: a limiting boss 20, which is arranged on the outer wall of the handle 14; two limiting blocks 21, which are arranged on both sides of the limiting boss 20 and can be correspondingly abutted against the limiting boss 20. The limiting blocks 21 and the limiting boss 20 are provided to limit the rotation angle of the knob. The knob rod 5 is provided with an indicating arrow 22, and the knob cover 15 is provided with a plurality of pen tip thickness indicating marks 23.

[0031] The utility model provides a pen tip thickness adjustment mechanism, comprising a movable rod and a knob, wherein the adjustment portion of the knob has a driving surface arranged perpendicularly to the moving direction of the movable rod, and the driving surface has a plurality of steps arranged in sequence around the rotation center of the knob and having different heights, each step is provided with a positioning groove abutting against the first abutting rod, and a transition slope is provided between two adjacent steps. By rotating the knob, the plurality of steps of different heights of the adjustment portion abut against the first abutting rod respectively, thereby forming a plurality of gears for adjusting the thickness of the pen tip, and the first abutting rod can slide relative to the transition slope, thereby switching between different steps, and the above-mentioned pen tip thickness adjustment mechanism has the advantage of simple structure.

[0032] The pen tip thickness adjustment mechanism provided by the utility model comprises a movable rod 3 and a knob 4. The adjustment portion 6 of the knob 4 has a driving surface 7 which is arranged perpendicularly to the moving direction of the movable rod 3. The driving surface 7 has a plurality of steps 8 which are arranged in sequence around the rotation center of the knob 4 and have different heights. Each step 8 is provided with a positioning groove 9 which abuts against the first abutting rod 1, and a transition slope 10 is provided between two adjacent steps 8. By rotating the knob 4, the plurality of steps 8 of different heights of the adjustment portion 6 abut against the first abutting rod 1 respectively, thereby driving the movable rod 3 to move, and the second abutting rod 2 of the movable rod 3 abuts against the pen tip to limit the depth of the pen 24 extending into the pencil sharpener body, thereby limiting the thickness of the pen tip. The above structure forms a plurality of gears for adjusting the thickness of the pen tip. The first abutting rod 1 can slide relative to the transition slope 10, thereby switching between different steps 8. The above pen tip thickness adjustment mechanism has the advantage of simple structure.

[0033] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A pen tip thickness adjustment mechanism, characterized in that: include: The movable rod (3) is movably mounted in the pencil sharpener body and comprises a first abutting rod (1) and a second abutting rod (2) respectively arranged at two ends thereof, wherein the first abutting rod (1) is arranged adjacent to the knob (4), and the second abutting rod (2) is used to abut against the pen tip; A knob (4) is rotatably mounted on the pencil sharpener body, and comprises a knob rod (5) extending out of the pencil sharpener body, and a gear adjustment portion (6) located in the pencil sharpener body, wherein the gear adjustment portion (6) comprises a driving surface (7) arranged perpendicularly to the moving direction of the movable rod (3), and the driving surface (7) comprises a plurality of steps (8) arranged in sequence around the rotation center of the knob (4) and having different heights, each of the steps (8) is provided with a positioning groove (9) abutting against the first abutting rod (1), and a transition inclined surface (10) is provided between two adjacent steps (8).

2. The pen tip thickness adjustment mechanism according to claim 1, characterized in that: The positioning groove (9) is an arc-shaped groove, and the end surface of the first abutment rod (1) adjacent to the positioning groove (9) is an arc-shaped surface.

3. The pen tip thickness adjustment mechanism according to claim 1 or 2, characterized in that: A tool holder (11) is provided in the pencil sharpener body, the tool holder (11) is formed with a cavity suitable for installing the movable rod (3), the first abutting rod (1) and the second abutting rod (2) extend from two ends of the cavity respectively, a round table (12) is provided in the middle of the movable rod (3), a spring (13) is also installed in the cavity, one end of the spring (13) abuts against the round table (12), and the other end abuts against the inner wall of the cavity adjacent to the second abutting rod (2).

4. The pen tip thickness adjustment mechanism according to claim 3, characterized in that: A handle (14) and a knob cover (15) are installed outside the pencil sharpener body; a side of the handle (14) away from the knob cover (15) is fixed to the tool holder (11); the knob cover (15) is formed with a mounting cavity and a through hole (16) connected to the mounting cavity; the gear adjustment portion (6) is arranged in the mounting cavity; and the through hole (16) is used for the knob rod (5) to extend out.

5. The pen tip thickness adjustment mechanism according to claim 4, characterized in that: A round shaft (17) is provided in the middle of the driving surface (7), and a groove (18) for the round shaft (17) to penetrate and a through hole (19) for the first abutting rod (1) to penetrate are provided on the handle (14).

6. The pen tip thickness adjustment mechanism according to claim 4 or 5, characterized in that: A limiting structure is provided between the knob (4) and the handle (14), and the limiting structure comprises: A limiting boss (20) is provided on the outer wall of the handle (14); Two limiting blocks (21) are respectively arranged on both sides of the limiting boss (20) and can correspond to and abut against the limiting boss (20).

7. The pen tip thickness adjustment mechanism according to claim 4, characterized in that: The knob rod (5) is provided with an indication arrow (22), and the knob cover (15) is provided with a plurality of pen tip thickness indication marks (23).

8. A pencil sharpener, characterized in that: It comprises a pen tip thickness adjustment mechanism as described in any one of claims 1-7.

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