Pencil point thickness adjusting mechanism for pencil sharpener

Abstract

The utility model relates to the field of pencil sharpeners, in particular to a pencil point thickness adjusting mechanism for a pencil sharpener, which comprises a cutter group, an adjusting mechanism, an inner gear and a rocking handle for realizing a cutting function. Through cooperative use of an insert of the adjusting mechanism, a sliding block connected to the insert in a sliding mode, a push rod abutting against the sliding block, a screw abutting against the push rod and an adjusting button connected with the screw in a sleeving mode, the depth of the portion, stretching into a through hole of a tool rest, of the screw is adjusted by rotating the adjusting button, so that the push rod is pushed to move in the through hole, and then the sliding block is pushed; by changing the position of the sliding block, stepless adjustment of the thickness of the refill is achieved, and various requirements and fine requirements for the thickness of the pen point are met.

Description

Technical Field

[0001] The utility model relates to the field of pencil sharpeners, in particular to a pen tip thickness adjustment mechanism for pencil sharpeners. Background Art

[0002] For writers and painters, they often need to use pencil tips of different thicknesses and lengths to adapt to different usage environments.

[0003] However, the nib adjustment mechanisms on existing pencil sharpeners are generally step-adjustable and can generally only adjust two nib thicknesses. For example, patent number "CN208343778U" discloses a direct-push two-stage nib thickness adjustment mechanism and a pencil sharpener. The mechanism utilizes a clever structural coordination between a button, a guide sleeve, and a guide rod. The button is operated by the user's hand, and by pressing the button, the guide rod is adjusted to two axial positions. The first position is when the pencil tip is thinner; the second position is when the pencil tip is thicker. The position of the push rod extending into the tool holder determines the thickness of the pencil tip after cutting. The guide rod is fixed to the push rod that can determine the thickness of the pencil tip, so that the two-stage requirements of the pencil tip can be met by directly pushing the button, namely, the thicker nib position and the thinner nib position. This nib adjustment mechanism can only adjust two fixed nib thicknesses, and the adjustment method is step-adjustable, which cannot meet the needs of diverse nib thicknesses. Utility Model Content

[0004] In order to solve the above-mentioned defects, the utility model provides a pen tip thickness adjustment mechanism with a simple structure and the ability to produce a variety of nib thickness adjustment mechanisms, thereby solving the problem of having only two levels of thickness adjustment.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pen tip thickness adjustment mechanism for a pencil sharpener, comprising a blade assembly, an adjustment mechanism, an internal gear, and a crank handle. The blade assembly comprises a blade holder, a cutting hob, and a fixed shaft. The cutting hob is fixed to the blade holder via the fixed shaft. One end of the blade holder is provided with a pen feed hole, and the other end is provided with a first external thread on the outer wall and a through hole inside. The inner wall of the through hole is provided with a first internal thread.

[0007] The internal gear is meshed with the knife group through gear teeth, and the crank handle is threadedly connected to the first external thread of the knife holder through a second internal thread. Shaking the crank handle drives the internal gear, thereby driving the knife group to rotate and cut the pencil;

[0008] The adjusting mechanism includes an insert block arranged at the bottom of the tool rest, a slider slidably connected to the insert block, a push rod abutted against the slider, a screw rod abutted against the push rod, and an adjusting knob sleeved on the screw rod. The adjusting knob passes through the rocker handle and is rotatably connected to the rocker handle. One end of the screw rod is arranged as a cylinder, and a second external thread is arranged on the outer wall, and it is threadedly connected to the tool rest through the first internal thread on the inner wall of the through hole.

[0009] Furthermore, a sliding groove is arranged on the insert block, and the sliding groove is used to limit the movement direction and stroke of the slider.

[0010] Furthermore, the insert block is also provided with no less than 3 guide posts.

[0011] Furthermore, the push rod and the screw rod are arranged inside the through hole and move inside the through hole.

[0012] Furthermore, a limiting step is arranged at one end of the through hole, and the thinner end of the push rod passes through this end provided with the limiting step and its stroke is limited by the limiting step.

[0013] Furthermore, the end of the screw rod away from the second external thread is arranged as a hexagonal rod and is inserted and fixed to the adjusting knob.

[0014] The beneficial effects of adopting the above technical solutions are as follows:

[0015] By setting the adjusting mechanism, not only is the structure simple and the assembly fast, but also the depth of the screw rod extending into the through hole of the tool rest can be adjusted by rotating the adjusting knob, thereby pushing the push rod to move inside the through hole, and then pushing the slider. By changing the position of the slider, stepless adjustment of the cutting of the pen tip thickness can be realized, meeting various requirements and refined requirements for the thickness of the pen tip. Description of the Drawings

[0016] Figure 1 is the structural schematic diagram of the embodiment of the present utility model;

[0017] Figure 2 is the assembled structural schematic diagram of the tool group, insert block and slider of the embodiment of the present utility model;

[0018] Figure 3 is the structural explosion diagram of the embodiment of the present utility model;

[0019] Figure 4 is the structural schematic diagram of the tool rest and the adjusting mechanism of the embodiment of the present utility model;

[0020] Figure 5 is the structural schematic diagram of the rocker handle of the embodiment of the present utility model;

[0021] Figure 6It is a schematic structural diagram of an insert block and a slider according to an embodiment of the present utility model.

[0022] Reference numerals

[0023] 1. Knife group; 11. Knife rest; 12. Cutting hob; 13. Fixed shaft; 111. Pen inlet hole; 112. First external thread; 113. Through hole; 1131. Limit step; 114. First internal thread; 2. Internal gear; 21. Teeth; 3. Adjusting mechanism; 31. Insert block; 311. Slide groove; 312. Guide post; 32. Slider; 33. Push rod; 34. Screw rod; 341. Second external thread; 35. Adjusting knob; 4. Crank; 41. Second internal thread. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Refer to Figures 1 to 6 , a tip thickness adjusting mechanism for a pencil sharpener, comprising a knife group, an adjusting mechanism, an internal gear and a crank. The knife group includes a knife rest, a cutting hob and a fixed shaft. The cutting hob is fixed on the knife rest through the fixed shaft. One end of the knife rest is provided with a pen inlet hole, the outer wall of the other end is provided with a first external thread and a through hole is provided inside. The inner wall of the through hole is provided with a first internal thread; the internal gear meshes with the knife group through teeth, and the crank is threadedly connected to the first external thread of the knife rest through a second internal thread. Shaking the crank drives the internal gear, thereby driving the knife group to rotate to cut a pencil; the adjusting mechanism includes an insert block arranged at the bottom of the knife rest, a slider slidably connected to the insert block, a push rod abutted against the slider, a screw rod abutted against the push rod, and an adjusting knob sleeved on the screw rod. The adjusting knob passes through the crank and is rotatably connected to the crank. One end of the screw rod is formed into a cylinder, and a second external thread is provided on the outer wall, and it is threadedly connected to the knife rest through the first internal thread on the inner wall of the through hole.

[0026] With the above technical solution, by setting the cutter group 1, internal gear 2, adjusting mechanism 3 and crank 4, the internal gear 2 meshes with the cutter group 1 through the teeth 21, and the crank 4 is threadedly connected to the first external thread 112 of the tool holder 11 through the second internal thread 41. Rotating the crank 4 drives the internal gear 2, thereby driving the cutter group 1 to rotate and cut the pencil; through the coordinated use of the insert 31, slider 32, push rod 33, screw rod 34 and adjusting knob 35 of the adjusting mechanism 3, rotating the adjusting knob 35 drives the screw rod 34 fixedly inserted therein to rotate about the center line, so that one end of the screw rod 34 with the second external thread 341 moves leftward inside the through hole 113 of the tool holder 11, pushing the abutting push rod 33 to move leftward as well, and then pushing the abutting slider 32 to move leftward in the sliding groove 311 of the insert 31; when the positive rotation of the adjusting knob 35 stops, the position of the slider 32 no longer moves leftward. When cutting the pencil, the tip of the pencil pushes the slider 32 to move rightward and is blocked by the push rod 33 and the screw rod 34, and at this time the thickness of the tip is fixed; when the adjusting knob 35 rotates in the reverse direction, the screw rod 34 moves rightward inside the through hole 113. When cutting the tip of the pencil, the tip of the pencil pushes the slider 32 to move rightward until it abuts against the push rod 33, and the slider 32 stops moving, and the position of the slider 32 is fixed. At this time, the thickness of the tip of the pencil is also fixed. By rotating the adjusting knob 35, the position change of the slider 32 relative to the tip of the pencil is realized, so as to realize stepless adjustment of the cutting of the thickness of the pencil lead and meet the requirements of various needs and refinement for the thickness of the tip of the pencil.

[0027] Reference Figure 2 and Figure 6 , a sliding groove is provided on the insert, and the sliding groove is used to limit the movement direction and stroke of the slider.

[0028] With the above technical solution, by providing the sliding groove 311 on the insert 31, the movement direction and stroke of the slider 32 are restricted, thereby restricting the thickness range of the tip of the pencil.

[0029] Reference Figure 6 , the insert is further provided with at least 3 guide posts.

[0030] With the above technical solution, by providing the guide posts 312 on the insert 31 and the number being not less than 3, the insert 31 is riveted from the back to the front in the holes preset at the bottom of the tool holder 11, and the guide posts 312 are pressed into the preset holes, having good stability.

[0031] Reference Figure 4 , the push rod and the screw rod are arranged inside the through hole and move inside the through hole.

[0032] With the above technical solution, by arranging the push rod 33 and the screw rod 34 inside the through hole 113 and moving inside the through hole 113, it is used to limit the movement direction and stroke of the push rod 33.

[0033] Reference Figure 4 One end of the through hole is provided with a limiting step, and the thinner end of the push rod passes through this end provided with the limiting step and its stroke is limited by the limiting step.

[0034] With the above technical solution, by providing the limiting step 1131, the thicker end of the push rod 33 can be blocked, thereby limiting the stroke of the push rod 33 inside the through hole 113.

[0035] Reference Figure 5 One end of the screw rod away from the second external thread is provided as a hexagonal rod and is inserted and fixed with the adjusting knob.

[0036] With the above technical solution, by providing one end of the screw rod 34 as a hexagonal rod and inserting and fixing it with the adjusting knob 35, the rotation of the screw rod can be controlled by rotating the adjusting knob 35.

[0037] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or simply means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower horizontal height than the second feature.

[0038] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0039] The above is only a preferred specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model, according to the technical solution of the present utility model and its inventive concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present utility model.

Claims

1. A tip thickness adjusting mechanism for a pencil sharpener, characterized in that: It includes a cutter group (1), an internal gear (2), an adjusting mechanism (3) and a crank (4). The cutter group (1) includes a tool holder (11), a cutting hob (12) and a fixed shaft (13). The cutting hob (12) is fixed on the tool holder (11) through the fixed shaft (13). One end of the tool holder (11) is provided with a pen inlet hole (111), the outer wall of the other end is provided with a first external thread (112) and a through hole (113) is arranged inside, and a first internal thread (114) is arranged on the inner wall of the through hole (113). The internal gear (2) is meshed with the cutter group (1) through teeth (21). The crank (4) is threadedly connected with the first external thread (112) of the tool holder (11) through a second internal thread (41). Shaking the crank (4) drives the internal gear (2), thereby driving the cutter group (1) to rotate for cutting the pencil. The adjusting mechanism (3) includes an insert block (31) arranged at the bottom of the tool holder (11), a slider (32) slidably connected to the insert block (31), a push rod (33) abutted against the slider (32), a screw rod (34) abutted against the push rod (33) and an adjusting knob (35) sleeved on the screw rod (34). The adjusting knob (35) passes through the crank (4) and is rotatably connected with the crank (4). One end of the screw rod (34) is arranged as a cylinder, and a second external thread (341) is arranged on the outer wall, and it is threadedly connected with the tool holder (11) through the first internal thread (114) on the inner wall of the through hole (113).

2. The nib thickness adjusting mechanism for a pencil sharpener according to claim 1, wherein: A chute (311) is arranged on the insert block (31), and the chute (311) is used to limit the movement direction and stroke of the slider (32).

3. The tip thickness adjusting mechanism for a pencil sharpener according to claim 2, characterized in that: The insert block (31) is further provided with not less than 3 guide posts (312).

4. The tip thickness adjusting mechanism for a pencil sharpener according to claim 3, characterized in that: The push rod (33) and the screw rod (34) are arranged inside the through hole (113) and move inside the through hole (113).

5. The tip thickness adjusting mechanism for a pencil sharpener according to claim 4, characterized in that: A limiting step (1131) is arranged at one end of the through hole (113). The thinner end of the push rod (33) passes through the end provided with the limiting step (1131) and its stroke is limited by the limiting step (1131).

6. The nib thickness adjustment mechanism for a pencil sharpener according to claim 5, characterized in that: One end of the screw rod (34) far from the second external thread (341) is arranged as a hexagonal rod and is inserted and fixed with the adjusting knob (35).

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