Rotary writing tool grinding device

Abstract

The utility model discloses a rotary writing tool grinding device which comprises a grinding body and a rotary support. The grinding main body comprises a shell and a knife rest; an outer pen inlet hole is formed in the first end part of the shell, and the inner pen inlet hole of the knife rest is opposite to the outer pen inlet hole; the rotating bracket comprises a movable connecting part and a fixed connecting part; the movable connecting part is movably connected with the shell of the grinding main body; the fixed connecting part is provided with a sleeving inner cavity, and a pen hole plug is convexly arranged in the sleeving inner cavity; in the storage mode, the fixed connecting part is fixedly connected with the first end part of the shell in a sleeving manner, and the pen hole plug plugs the outer pen inlet hole; in the sharpening mode, the fixed connecting part is fixedly connected with the second end part of the shell in a sleeving manner, and the outer pencil inlet hole is opened; the movable connecting part linearly moves relative to the shell, so that the first end part or the second end part enters and exits from the sleeving inner cavity; the rotary bracket can rotate relative to the shell of the grinding main body; the multi-mode rotating chip-leakage-preventing device has the advantages that multi-mode switching of a rotating mode is achieved, the reliable chip-leakage-preventing function is achieved, and the tool performance and the entertainment performance are both achieved.

Description

Technical Field

[0001] The utility model relates to a writing tool grinding device, in particular to a rotary writing tool grinding device used for grinding pencils, pen cores, carbon rods and other writing tools that can be ground. Background Art

[0002] Pencils, refills, carbon rods, and other writing instruments all require sharpening to maintain optimal writing and drawing conditions. Currently, there's a wide variety of sharpening devices on the market, including pencil sharpeners, refill sharpeners, pencil sharpeners, and utility knives, catering to the diverse preferences and usage scenarios of different users.

[0003] For example, utility model patent TW248118U discloses a contamination-resistant pencil lead sharpener with an eraser. The device comprises a cylindrical body with an eraser attached at one end and a pencil lead sharpener at the other end. The sharpener consists of a sleeve, the same size as the inner wall of the cylindrical body, which is inserted into the body. A main body is located within the sleeve. The main body comprises a base plate with side panels on either side. A top plate with a pen hole is located on the top of the main body. A blade is fixed to the base plate. With this assembly, a pencil lead can be cut by simply inserting it through the pen hole and rotating it.

[0004] This prior art discloses a pencil refill sharpener. The vast majority of such products on the market suffer from similar issues, including unreliable anti-shavings leakage prevention, tedious mode switching, and fragmented and detachable components. For example, most sharpening devices lack a storage mode to prevent shavings leakage, only a sharpening mode. As a result, the pen hole is often left open, allowing refill dust and fine powder to easily leak out. Even if a storage mode is provided, at most a cap is installed at the pen inlet. This cap typically needs to be removed separately, making it easy to lose it, and inserting and removing the cap is tedious and uninteresting. Utility Model Content

[0005] In view of the technical problems of the existing writing tool grinding device such as unreliable anti-chip leakage function, monotonous mode switching, and scattered and separated components, the technical problem to be solved by the present utility model is to provide a rotary writing tool grinding device, which not only has a reliable anti-chip and ash leakage design, but also can switch between the grinding mode and the storage mode in an interesting way without separating the components.

[0006] The technical solution adopted by the present invention to solve the above technical problems is as follows: a rotary writing tool sharpening device comprises a sharpening body and a rotating bracket; the sharpening body and the rotating bracket are movably connected;

[0007] The grinding body includes a shell and a tool holder installed in the shell; the tool holder has an inner pen feed hole, and the first end of the shell is provided with an outer pen feed hole, the inner pen feed hole is opposite to the outer pen feed hole;

[0008] The rotating bracket includes a movable connection part and a fixed connection part; the movable connection part is movably connected to the shell of the grinding body; the fixed connection part has a sleeve inner cavity, and a pen hole plug is protruded in the sleeve inner cavity;

[0009] In the storage mode, the first end of the shell enters the sleeve cavity, so that the fixed connection part is sleeved and fixed with the first end of the shell, and the pen hole plug blocks the external pen hole;

[0010] In the grinding mode, the second end of the shell enters the sleeve cavity so that the fixed connection portion is sleeved and fixed with the second end of the shell, and the external pen inlet hole is opened;

[0011] The movable connection portion moves linearly relative to the housing in a direction away from or close to the first end portion, so that the first end portion enters and exits the sleeve inner cavity; the movable connection portion moves linearly relative to the housing in a direction away from or close to the second end portion, so that the second end portion enters and exits the sleeve inner cavity;

[0012] When the first end and the second end of the shell leave the sleeve inner cavity, the movable connection portion can drive the rotating bracket to rotate relative to the shell of the grinding body.

[0013] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the movable connection portion includes two arms extending from both sides of the fixed connection portion in a direction away from the fixed connection portion; a linear sliding groove is formed on the arm;

[0014] A sliding rod is provided on each side of the housing, and the movable connection portion is movably connected to the housing via the sliding rod and the sliding groove;

[0015] The sliding rod slides in the corresponding sliding groove to enable the movable connection part to move linearly relative to the shell; in the storage mode, the sliding rod is restricted to the proximal end close to the fixed connection part; when the sliding rod is restricted to the distal end away from the fixed connection part, the movable connection part can drive the rotating bracket to rotate relative to the shell of the grinding body.

[0016] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the sliding rod includes a rod portion and an anti-tripping buckle located at the outer end portion of the rod portion; the diameter of the anti-tripping buckle is larger than the diameter of the rod portion;

[0017] The sliding groove includes an inner sliding groove close to the shell surface and an outer sliding groove away from the shell surface; the width of the inner sliding groove matches the rod portion, and the width of the outer sliding groove matches the anti-tripping buckle;

[0018] The rod portion is located in the inner sliding groove, and the anti-drop buckle is located in the outer sliding groove, for preventing the sliding rod from falling out of the sliding groove.

[0019] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: a proximal end limiting hole is provided at the proximal end of the sliding groove close to the fixed connection part, and a distal end limiting hole is provided at the distal end of the sliding groove away from the fixed connection part;

[0020] Deformable anti-slip protrusions are protruding from both sides of the entrance of the proximal end limiting hole; the anti-slip protrusions are used to limit the sliding rod within the proximal end limiting hole.

[0021] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the rotating bracket further includes a handle; the handle includes a control head, a mounting cover and a pen hole plug; the control head is located on the outside of the mounting cover, and the pen hole plug is located on the inside of the mounting cover;

[0022] The top of the fixed connection portion is provided with a handle mounting groove, and the handle mounting groove is provided with a handle mounting hole communicating with the sleeve inner cavity;

[0023] The pen hole plug passes through the handle mounting hole to protrude from the sleeve inner cavity, and the mounting cover covers the handle mounting groove so that the control head is fixed and located at the top end of the fixed connection part.

[0024] The preferred technical solution adopted by the present invention to solve the above technical problems is: the pen hole plug is made of flexible material; the pen hole plug is in the shape of an inverted cone, and the bottom end diameter of the inverted cone matches the external pen hole to block the external pen hole in the storage mode.

[0025] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the shell of the grinding body includes a first shell and a second shell movably connected to each other;

[0026] The first end of the housing is a closed end of the first housing, and the second end of the housing is a closed end of the second housing;

[0027] The first housing has a grinding chamber for mounting the tool holder, and the second housing has a chip collecting chamber for collecting pencil chips;

[0028] A drawer-type connection structure is provided between the open end of the first shell and the open end of the second shell, so as to form a movable connection between the first shell and the second shell.

[0029] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the tool holder is fixed in the grinding chamber by a fixing member; the fixing member has a transverse fixing wall, and the transverse fixing wall is provided with a fixing screw hole; a fixing stud corresponding to the fixing screw hole is provided in the grinding chamber;

[0030] The tool holder is placed in the grinding chamber in a manner that the inner pen feed hole is opposite to the outer pen feed hole, the fixing screw hole of the fixing member is screwed to the fixing stud, and the transverse fixing wall is used to fix the tool holder in the grinding chamber.

[0031] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the drawer-type connection structure includes a U-shaped avoidance groove provided at the open end of the first shell, and a U-shaped drawer edge provided at the open end of the second shell and matching the U-shaped avoidance groove;

[0032] A first inserting rib and a first slot are provided in parallel on both sides of the U-shaped avoidance groove, and a second inserting rib and a second slot are provided in parallel on both sides of the U-shaped drawer edge;

[0033] The first inserting rib is inserted into the second slot, and the second inserting rib is inserted into the first slot, so that the open end of the first shell and the open end of the second shell can be pulled relative to each other to open and close the chip collection chamber; when the chip collection chamber is closed, the U-shaped drawer edge enters the U-shaped avoidance groove, and the open end of the second shell compensates for the opening of the U-shaped drawer edge.

[0034] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: an inner abutment edge is protruded between the open end of the second shell and the opening position of the U-shaped drawer edge; when the open end of the first shell and the open end of the second shell are relatively pulled, the inner abutment edge moves in the grinding chamber;

[0035] When the chip collecting chamber is closed, the inner abutment abuts against one inner wall of the first shell; when the chip collecting chamber is opened, the inner abutment abuts against the other inner wall of the first shell.

[0036] The preferred technical solution adopted by the present invention to solve the above technical problems is as follows: the left and right sides of the first end and the second end of the shell are provided with rounded corners, and the rounded corners facilitate the first end and the second end to enter the sleeve cavity;

[0037] Arc-shaped grooves are formed on the front and rear sides of the first end and the second end of the shell, and the arc-shaped grooves are used to limit the depth of the first end and the second end entering the sleeve inner cavity.

[0038] Compared with the prior art, the advantages of the present invention are: by providing a rotating bracket on the grinding body that can rotate and move linearly relative to the grinding body, at least the following beneficial effects are achieved:

[0039] First, by combining the relative linear movement and rotation between the rotating bracket and the grinding body, the grinding device can be easily switched between the storage mode and the grinding mode. At the same time, the rotating bracket is always connected to the grinding body, and there is no separation between the components, thereby avoiding the loss of components.

[0040] Second, a storage mode is added, that is, the first end of the shell is sleeved and fixed to the fixed connection part of the rotating bracket, and the pen hole plug blocks the external pen inlet hole, effectively preventing the pen from sharpening, especially the leakage of pen core dust through the internal and external pen inlet holes to cause pollution.

[0041] Third, the rotating design between the rotating bracket and the grinding body not only makes the mode switching operation fun, but also allows users to entertain themselves by turning the rotating bracket when idle, thereby upgrading the writing tool grinding device from a simple tool product to a product with both tool and entertainment functions.

[0042] Fourth, in the grinding mode, the second end of the housing is sleeved and fixed to the fixed connection portion of the rotating bracket to prevent the rotating bracket from shaking and affecting the grinding operation when grinding the writing tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The present invention will be described in further detail below with reference to the accompanying drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are drawn only for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present invention. Furthermore, unless otherwise specified, the drawings are merely schematic representations of the composition or structure of the depicted objects and may contain exaggerated representations. Furthermore, the drawings are not necessarily drawn to scale.

[0044] Figure 1 Schematic diagram of the structure of the rotary anti-chip writing tool sharpening device in storage mode Figure 1 ;

[0045] Figure 2 Schematic diagram of the structure of the rotary anti-chip writing tool grinding device during mode switching Figure 1 ;

[0046] Figure 3 Schematic diagram of the structure of the rotary anti-chip writing tool grinding device during mode switching Figure 2 ;

[0047] Figure 4 A schematic diagram of the structure of the rotary anti-chip leakage writing tool grinding device in the grinding mode;

[0048] Figure 5 An exploded view of a rotary chip-proof writing instrument sharpening device;

[0049] Figure 6 An exploded view of a rotary bracket of a rotary chip-proof writing instrument sharpening device;

[0050] Figure 7 Cross-sectional view of a rotary chip-proof writing tool grinding device Figure 1 ;

[0051] Figure 8 Schematic diagram of the structure of the grinding body of the rotary anti-chip leakage writing tool grinding device Figure 1 ;

[0052] Figure 9 Cross-sectional view of a rotary chip-proof writing tool grinding device Figure 2 ;

[0053] Figure 10 Schematic diagram of the structure of the rotary anti-chip writing tool sharpening device in storage mode Figure 2 ;

[0054] Figure 11 Schematic diagram of the structure of the rotary anti-chip writing tool grinding device during mode switching Figure 3 ;

[0055] Figure 12 Schematic diagram of the drawer-type connection structure between the first shell and the second shell Figure 1 ;

[0056] Figure 13 Schematic diagram of the drawer-type connection structure between the first shell and the second shell Figure 2 ;

[0057] Figure 14 Schematic diagram of the drawer-type connection structure between the first shell and the second shell Figure 3 ;

[0058] Figure 15 Schematic diagram of the structure of the grinding body of the rotary anti-chip leakage writing tool grinding device Figure 2 ;

[0059] Figure 16 An exploded view of the first housing, the tool holder, and the fixing member;

[0060] Figure 17 It is an assembly drawing of the first housing, the tool holder, and the fixing member;

[0061] Description of reference numerals:

[0062] Rotary anti-leaking writing tool sharpening device 100, sharpening body 101, rotating bracket 102, housing 10, first end 10a, second end 10b, external pen feed hole 11, sliding rod 12, rod portion 12a, anti-drop buckle 12b, tool holder 20, internal pen feed hole 21, movable connection portion 30, support arm 31, sliding groove 32, inner slide groove 32a, outer slide groove 32b, proximal limiting hole 32c, distal limiting hole 32d, anti-drop protrusion t, fixed connection portion 40, sleeve inner cavity 41, pen hole plug 42, handle 43 , control head 44, mounting cover 45, handle mounting groove 46, handle mounting hole 47, first shell 50, grinding cavity 51, U-shaped avoidance groove 52, first dowel 53, first slot 54, fixing stud 55, baffle 57, tool holder accommodating cavity 51a, fixing part insertion cavity 51b, second shell 60, chip collection cavity 61, U-shaped drawer edge 62, second dowel 63, second slot 64, inner edge 65, fixing part 70, transverse fixing wall 71, fixing screw hole 72, longitudinal fixing wall 73, rounded corner y1, arc groove y2. DETAILED DESCRIPTION

[0063] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely illustrative and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0064] In the description of this utility model, it should be noted that the terms "upper," "lower," "front," "back," "left," "right," "inner," and "outer" and the like, indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is typically placed when in use. These terms are intended solely to facilitate the description of this utility model and simplify the description, and are not intended to indicate or imply that the device or component referred to must have a specific direction, be constructed, or operate in a specific direction. Therefore, they should not be construed as limitations on this utility model. The terms "first" and "second" are used solely to facilitate understanding and have no other directional meanings, and should not be construed as limitations on this utility model.

[0065] like Figures 1 to 5 The rotary writing instrument sharpening device 100 provided in this embodiment is shown. It is primarily used for sharpening pen refills, i.e., as a pen refill sharpener. In other embodiments, the device can also be used for sharpening pencils, carbon rods, and other writing instruments that require sharpening to maintain a suitable writing or drawing state. This can be achieved by simply adjusting the blade holder model and the diameters of the inner and outer pen inlets. This is not a limitation of the present invention.

[0066] The rotary writing tool sharpening device 100 includes a sharpening body 101 and a rotating bracket 102. The sharpening body 101 and the rotating bracket 102 are movably connected.

[0067] like Figure 5 As shown, the sharpening body 101 includes a housing 10 and a tool holder 20 mounted within the housing 10. The tool holder 20 has an inner pen feed hole 21. The first end 10a of the housing 10 is provided with an outer pen feed hole 11, with the inner pen feed hole 21 facing the outer pen feed hole 11. Thus, a writing instrument to be sharpened can be inserted from the outer pen feed hole 11 into the inner pen feed hole 21, thereby entering the tool holder 20 for sharpening.

[0068] The rotating bracket 102 includes a movable connection portion 30 and a fixed connection portion 40. The movable connection portion 30 is movably connected to the housing 10 of the grinding body 101. The fixed connection portion 40 has a sleeve inner cavity 41, and a pen hole plug 42 is protruded from the sleeve inner cavity 41.

[0069] like Figure 1 As shown, in the storage mode, the first end portion 10a of the housing 10 enters the sleeve cavity 41, so that the fixed connection portion 40 is sleeved and fixed to the first end portion 10a of the housing 10, and the pen hole plug 42 blocks the external pen inlet hole 11. This effectively prevents pen sharpening, especially the leakage of lead dust through the internal pen inlet hole 21 and the external pen inlet hole 11, which may cause contamination.

[0070] like Figure 4 As shown, in the sharpening mode, the second end portion 10b of the housing 10 enters the sleeve cavity 41, so that the fixed connection portion 40 is sleeved and fixed to the second end portion 10b of the housing 10, and the outer pen inlet 11 is opened. Thus, a writing instrument to be sharpened can be inserted from the outer pen inlet 11 into the inner pen inlet 21, thereby entering the interior of the tool holder 20 for sharpening.

[0071] like Figure 2 and Figure 3 As shown, the movable connection portion 30 moves linearly relative to the housing 10 in a direction away from or toward the first end portion 10a, so that the first end portion 10a enters and exits the sleeve cavity 41. The movable connection portion 30 moves linearly relative to the housing 10 in a direction away from or toward the second end portion 10b, so that the second end portion 10b enters and exits the sleeve cavity 41. When the first end portion 10a and the second end portion 10b of the housing 10 leave the sleeve cavity 41, the movable connection portion 30 can drive the rotating bracket 102 to rotate relative to the housing 10 of the grinding body 101.

[0072] It can be seen that the rotary writing instrument sharpening device 100 provided by the present invention achieves at least the following beneficial effects by providing a rotary bracket 102 on the sharpening body 101 that can rotate and move linearly relative to the sharpening body 101:

[0073] First, by combining the relative linear movement and rotation between the rotating bracket 102 and the grinding body 101, the grinding device can be easily switched between the storage mode and the grinding mode. At the same time, the rotating bracket 102 is always connected to the grinding body 101, and there is no separation between the components, thereby avoiding the loss of components.

[0074] Second, a storage mode is added, that is, the first end portion 10a of the shell 10 is fixedly sleeved with the fixed connection portion 40 of the rotating bracket 102, and the pen hole plug 42 blocks the external pen inlet hole 11, effectively preventing the pen from being sharpened, especially the lead dust from leaking through the internal pen inlet hole 21 and the external pen inlet hole 11 to cause pollution.

[0075] Third, the rotating design between the rotating bracket 102 and the sharpening body 101 not only makes the mode switching operation fun, but also allows the user to relax and have fun by rotating the rotating bracket 102 when the writing instrument sharpening device is not used, thereby upgrading the writing instrument sharpening device from a simple tool product to a product with both tool and entertainment functions.

[0076] Fourth, in the sharpening mode, the second end portion 10b of the housing 10 is sleeved and fixed to the fixed connection portion 40 of the rotating bracket 102 to prevent the rotating bracket 102 from shaking and affecting the sharpening operation when sharpening the writing tool.

[0077] like Figures 1 to 5 As shown, the movable connection portion 30 includes two arms 31 extending from either side of the fixed connection portion 40 in a direction away from the fixed connection portion 40. The arms 31 are provided with linear sliding slots 32. A sliding rod 12 is provided on each side of the housing 10, with each sliding rod 12 corresponding to a sliding slot 32 on a side of the arm 31. The movable connection portion 30 and the housing 10 are movably connected via the sliding rods 12 and sliding slots 32.

[0078] Each sliding rod 12 slides within the corresponding sliding slot 32, allowing the movable connection portion 30 to move linearly relative to the housing 10, thereby enabling the first end 10a and second end 10b of the housing 10 to enter and exit the sleeve cavity 41. In the stowed mode, the first end 10a of the housing 10 enters the sleeve cavity 41, and the sliding rod 12 is accordingly restrained at the proximal end near the fixed connection portion 40. When the sliding rod 12 is restrained at the distal end away from the fixed connection portion 40, the movable connection portion 30 can drive the rotating bracket 102 to rotate relative to the housing 10 of the grinding body 101.

[0079] It can be seen that the cooperation between the sliding groove 32 and the sliding rod 12 not only realizes the linear movement between the rotating bracket 102 and the grinding body 101, but also the two ends of the sliding groove 32 also play their respective roles. The proximal end cooperates with the sleeve inner cavity 41 to keep the first end 10a in the sleeve inner cavity 41, and the distal end cooperates with the sliding rod 12 to form a rotating axis for the rotating bracket 102 to rotate relative to the grinding body 101.

[0080] like Figure 8 and Figure 9 As shown, the sliding rod 12 includes a rod portion 12a and an anti-tripping buckle 12b located at the outer end of the rod portion 12a. The diameter of the anti-tripping buckle 12b is larger than the diameter of the rod portion 12a. The sliding groove 32 includes an inner groove 32a close to the surface of the housing 10 and an outer groove 32b away from the surface of the housing 10. The width of the inner groove 32a matches that of the rod portion 12a, and the width of the outer groove 32b matches that of the anti-tripping buckle 12b.

[0081] After the sliding rod 12 is assembled with the corresponding sliding groove 32, the rod portion 12a is located in the inner sliding groove 32a, and the anti-trip buckle 12b is located in the outer sliding groove 32b. On the one hand, it prevents the sliding rod 12 from escaping from the sliding groove 32. On the other hand, it plays a guiding and limiting role during the linear movement of the rotating bracket 102, thereby reducing the left and right shaking deviation of the rotating bracket 102.

[0082] like Figure 10 and Figure 11 As shown, a proximal limiting hole 32c is provided at the proximal end of the sliding groove 32 close to the fixed connection part 40, and a distal limiting hole 32d is provided at the distal end of the sliding groove 32 away from the fixed connection part 40. Deformable anti-slip protrusions t are provided on both sides of the entrance of the proximal limiting hole 32c, and the anti-slip protrusions t are used to limit the sliding rod 12 in the proximal limiting hole 32c.

[0083] Thus, the proximal limiting hole 32c, via the deformable anti-slip protrusion t, constrains the sliding rod 12 therein. This, on the one hand, cooperates with the sleeve lumen 41 to retain the first end 10a within the sleeve lumen 41. On the other hand, when the rotating bracket 102 needs to be moved linearly to remove the first end of the housing 10 from the sleeve lumen 41, a certain force needs to be applied to deform the anti-slip protrusion t, thereby releasing the sliding rod 12.

[0084] In contrast, the distal limiting hole 32d lacks a limiting feature similar to the anti-dropout protrusion t. This is because it, in conjunction with the sliding rod 12, forms the axis for the rotation of the rotating bracket 102 relative to the grinding body 101. To ensure smooth rotation, no damping limiting feature is provided. Instead, and preferably, a slightly loose design is employed, where the diameter of the distal limiting hole 32d is slightly larger than the diameter of the anti-dropout buckle 12b of the sliding rod 12. This allows the sliding rod 12 to easily fit into the sliding groove 32 through the distal limiting hole 32d during assembly of the grinding body 101 and the rotating bracket 102, simplifying and reducing assembly effort.

[0085] like Figures 5 to 7 As shown, the rotating bracket 102 also includes a handle 43, which includes a control head 44, a mounting cover 45, and a pen hole plug 42. The control head 44 is located outside the mounting cover 45, and the pen hole plug 42 is located inside the mounting cover 45. A handle mounting groove 46 is defined at the top of the fixed connection portion 40. A handle mounting hole 47 is defined within the handle mounting groove 46 and communicates with the sleeve cavity 41.

[0086] During assembly, the pen hole plug 42 passes through the handle mounting hole 47 to protrude from the sleeve cavity 41, and the mounting cover 45 covers the handle mounting groove 46, so that the control head 44 is fixed and located at the top of the fixed connection part 40. The control head 44 makes it easy for the user to access the sharpening device and facilitates the movement of the rotating bracket 102 during mode switching and rotation decompression.

[0087] The pen hole plug 42 is made of a flexible material, which facilitates blocking and sealing the external pen hole 11. The pen hole plug 42 has an inverted conical shape, and the bottom diameter of the inverted cone matches the external pen hole 11, thereby blocking the external pen hole in the storage mode. In addition, from an assembly perspective, the pen hole plug 42 is made of a flexible material and its inverted cone shape can be used to more easily insert into the handle mounting hole 47. The top of the inverted cone has a larger diameter, forming a reverse buckle, making it difficult to pull the pen hole plug 42 from the mounting cover 45 when pulling the control head 44.

[0088] like Figures 12 to 15 As shown, the housing 10 of the grinding body 101 includes a first housing 50 and a second housing 60 that are movably connected to each other. The first end 10a of the housing 10 is the closed end of the first housing 50, and the second end 10b of the housing 10 is the closed end of the second housing 60. The first housing 50 has a grinding chamber 51 for mounting the tool holder 20, and the second housing 60 has a chip collection chamber 61 for collecting pencil shavings. A drawer-type connection structure is provided between the open ends of the first housing 50 and the second housing 60 to form a movable connection between the first housing 50 and the second housing 60.

[0089] Furthermore, after the writing tool is ground in the grinding chamber 51 of the first shell 50, pencil shavings, pencil lead ash, etc. fall into the chip collection chamber 61 in the second shell 60. The user can pull the second shell 60 relative to the first shell 50 through the drawer-type connection structure to open or close the open end of the second shell 60, thereby cleaning the pencil shavings and pencil lead ash in the chip collection chamber 61.

[0090] Those skilled in the art will understand that the open end of the first shell 50 and the second shell 60 refers to the end where the internal cavity thereof is connected to the external space, and the closed end refers to the end opposite the open end, that is, the end isolated from the external space. Although the closed end of the first shell 50 has the external pen inlet hole 11, it is still considered a closed end relative to the open end.

[0091] like Figure 4 、 Figure 16 and Figure 17 As shown, the tool holder 20 is secured within the grinding chamber 51 via a fixing member 70. The fixing member 70 includes a transverse fixing wall 71 with a fixing screw hole 72 defined therein. The grinding chamber 51 includes a fixing stud 55 corresponding to the fixing screw hole 72. During assembly, the tool holder 20 is placed within the grinding chamber 51 with the inner pen feed hole 21 facing the outer pen feed hole 11. The fixing screw hole 72 of the fixing member 70 is screwed onto the fixing stud 55, and the transverse fixing wall 71 secures the tool holder 20 within the grinding chamber 51.

[0092] In addition, in this embodiment, a longitudinal fixing wall 73 is also provided on the transverse fixing wall 71 of the fixing member 70, and a baffle 57 is provided in the grinding chamber 51 to divide the grinding chamber 51 into a tool holder accommodating chamber 51a and a fixing member insertion chamber 51b. The tool holder 20 is placed in the tool holder accommodating chamber 51a in a manner such that the inner pen feed hole 21 and the outer pen feed hole 11 are opposite each other. The longitudinal fixing wall 73 of the fixing member 70 is inserted into the fixing member insertion chamber 51b, and the fixing screw hole 72 is screwed to the fixing stud 55. The transverse fixing wall 71 is used to fix the tool holder 20 in the tool holder accommodating chamber 51a. Furthermore, the longitudinal fixing wall 73 is inserted into the fixing member insertion chamber 51b to position the fixing member 70, thereby improving assembly efficiency and enhancing the firmness of the fixing member 70 and the tool holder 20 after assembly.

[0093] like Figures 12 to 15 As shown, the drawer-type connection structure includes a U-shaped avoidance groove 52 provided at the open end of the first shell 50, and a U-shaped drawer edge 62 provided at the open end of the second shell 60 to match the U-shaped avoidance groove 52. A first rib 53 and a first slot 54 are provided in parallel on both sides of the U-shaped avoidance groove 52, and a second rib 63 and a second slot 64 are provided in parallel on both sides of the U-shaped drawer edge 62.

[0094] The first rib 53 is inserted into the second slot 64, and the second rib 63 is inserted into the first slot 54, thereby forming limit stops in four directions, up and down, left and right, by interlacing with each other, so that the open end of the first shell 50 and the open end of the second shell 60 can be pulled relative to each other in the front-to-back direction, for opening and closing the chip collection chamber 61.

[0095] When the chip collection chamber 61 is closed, the U-shaped edge 62 enters the U-shaped avoidance groove 52, and the open end of the second shell 60 fills the opening of the U-shaped edge 62. Therefore, when the chip collection chamber 61 is closed, the first shell 50 and the second shell 60 are combined to form a shell 10 with good surface integrity, unity, and smoothness. Not only does it have a smooth visual effect, but it also feels smoother and more comfortable when held in the hand.

[0096] An inner abutment 65 protrudes from the open end of the second housing 60 and the opening of the U-shaped drawer edge 62. When the open ends of the first and second housings 50 are pulled relative to each other, the inner abutment 65 moves within the grinding chamber 51. When the chip collection chamber 61 is closed, the inner abutment 65 abuts against one inner wall of the first housing 50. When the chip collection chamber 61 is open, the inner abutment 65 abuts against the other inner wall of the first housing 50. This inner abutment 65 limits the extent to which the second housing 60 can be pulled relative to the first housing 50, preventing excessive force from causing the entire second housing 60 to be pulled out, potentially spilling debris.

[0097] In addition, the drawer-like connection structure between the open end of the first shell 50 and the open end of the second shell 60 also has a chip and ash leakage prevention function due to its staggered and interlaced embedded structure. Specifically, when the chip collection chamber 61 is closed, the U-shaped avoidance groove 52 and the U-shaped drawer edge 62 form a first-level staggered embedded structure, the first dowel 53 is inserted into the second slot 64 to form a second-level staggered embedded structure, the second dowel 63 is inserted into the first slot 54 to form a third-level staggered embedded structure, and the inner edge 65 and the open end of the first shell 50 form a fourth-level staggered embedded structure, a four-level staggered embedded structure. This forms a closed chip and ash leakage prevention structure in all directions, including up and down, left and right, and front and back, at the connection between the first shell 50 and the second shell 60, reliably preventing pencil sharpening and lead ash from leaking out of the connection between the two.

[0098] When the chip collecting chamber 61 is opened, the inner edge 65 can also block the pen sharpenings and lead dust in the chip collecting chamber 61 from rushing in the opposite direction of the second shell 60 due to inertia, thereby preventing them from leaking out from the rear side of the chip collecting chamber 61.

[0099] like Figure 15 As shown, the left and right sides of the first end 10a and the second end 10b of the shell 10 are provided with rounded corners y1, which facilitate the first end 10a and the second end 10b to enter the sleeve cavity 61 and increase the smoothness of the appearance of the entire shell 10.

[0100] The first and second ends 10a, 10b of the housing 10 are recessed with arcuate grooves y2 on their front and rear sides. These grooves y2 limit the depth of the first and second ends 10a, 10b that can enter the sleeve cavity 41, while also enhancing the aesthetic appearance of the housing 10. Furthermore, in this embodiment, the front and rear side surfaces of the housing 10 are also designed to have a certain curvature. The addition of the rounded corners y1 and the arcuate grooves y2 creates a streamlined structure at both ends of the housing 10, significantly improving its appearance and feel.

[0101] It should be noted that like reference numerals denote like items in the following drawings, and thus, once an item is defined in one drawing, it may not be further defined or explained in subsequent drawings.

[0102] The above describes the rotary writing instrument sharpening device provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The above examples are intended only to facilitate understanding of the present invention and its core concepts. It should be noted that those skilled in the art may, without departing from the principles of the present invention, make various improvements and modifications to the present invention, and such improvements and modifications fall within the scope of protection of the claims of the present invention.

Claims

1. A rotary writing tool sharpening device, characterized in that: It includes a grinding body and a rotating bracket; the grinding body and the rotating bracket are movably connected; The grinding body includes a shell and a tool holder installed in the shell; the tool holder has an inner pen feed hole, and the first end of the shell is provided with an outer pen feed hole, the inner pen feed hole is opposite to the outer pen feed hole; The rotating bracket includes a movable connection part and a fixed connection part; the movable connection part is movably connected to the shell of the grinding body; the fixed connection part has a sleeve inner cavity, and a pen hole plug is protruded in the sleeve inner cavity; In the storage mode, the first end of the shell enters the sleeve cavity, so that the fixed connection part is sleeved and fixed with the first end of the shell, and the pen hole plug blocks the external pen hole; In the grinding mode, the second end of the shell enters the sleeve cavity so that the fixed connection portion is sleeved and fixed with the second end of the shell, and the external pen inlet hole is opened; The movable connection portion moves linearly relative to the housing in a direction away from or close to the first end portion, so that the first end portion enters and exits the sleeve inner cavity; the movable connection portion moves linearly relative to the housing in a direction away from or close to the second end portion, so that the second end portion enters and exits the sleeve inner cavity; When the first end and the second end of the shell leave the sleeve inner cavity, the movable connection portion can drive the rotating bracket to rotate relative to the shell of the grinding body.

2. The rotary writing tool sharpening device according to claim 1, characterized in that: The movable connection portion includes two arms extending from both sides of the fixed connection portion in a direction away from the fixed connection portion; a linear sliding groove is formed on the arms; A sliding rod is provided on each side of the housing, and the movable connection portion is movably connected to the housing via the sliding rod and the sliding groove; The sliding rod slides in the corresponding sliding groove to enable the movable connection part to move linearly relative to the shell; in the storage mode, the sliding rod is restricted to the proximal end close to the fixed connection part; when the sliding rod is restricted to the distal end away from the fixed connection part, the movable connection part can drive the rotating bracket to rotate relative to the shell of the grinding body.

3. The rotary writing tool sharpening device according to claim 2, characterized in that: The sliding rod includes a rod portion and an anti-tripping buckle located at an outer end portion of the rod portion; the diameter of the anti-tripping buckle is larger than the diameter of the rod portion; The sliding groove includes an inner sliding groove close to the shell surface and an outer sliding groove away from the shell surface; the width of the inner sliding groove matches the rod portion, and the width of the outer sliding groove matches the anti-tripping buckle; The rod portion is located in the inner sliding groove, and the anti-drop buckle is located in the outer sliding groove, for preventing the sliding rod from falling out of the sliding groove.

4. The rotary writing tool sharpening device according to claim 2, wherein: The proximal end of the sliding groove close to the fixed connection part is provided with a proximal end limiting hole, and the distal end of the sliding groove away from the fixed connection part is provided with a distal end limiting hole; Deformable anti-slip protrusions are protruding from both sides of the entrance of the proximal end limiting hole; the anti-slip protrusions are used to limit the sliding rod within the proximal end limiting hole.

5. The rotary writing tool sharpening device according to claim 1, wherein: The rotating bracket further includes a handle; the handle includes a control head, a mounting cover, and a pen hole plug; the control head is located on the outside of the mounting cover, and the pen hole plug is located on the inside of the mounting cover; The top of the fixed connection portion is provided with a handle mounting groove, and the handle mounting groove is provided with a handle mounting hole communicating with the sleeve inner cavity; The pen hole plug passes through the handle mounting hole to protrude from the sleeve inner cavity, and the mounting cover covers the handle mounting groove so that the control head is fixed and located at the top end of the fixed connection part.

6. The rotary writing tool sharpening device according to claim 5, characterized in that: The pen hole plug is made of a flexible material; the pen hole plug is in an inverted cone shape, and the bottom end diameter of the inverted cone matches the external pen hole to block the external pen hole in the storage mode.

7. The rotary writing tool sharpening device according to claim 1, wherein: The housing of the grinding body includes a first housing and a second housing movably connected to each other; The first end of the housing is a closed end of the first housing, and the second end of the housing is a closed end of the second housing; The first housing has a grinding chamber for mounting the tool holder, and the second housing has a chip collecting chamber for collecting pencil chips; A drawer-type connection structure is provided between the open end of the first shell and the open end of the second shell, so as to form a movable connection between the first shell and the second shell.

8. The rotary writing tool sharpening device according to claim 7, characterized in that: The tool holder is fixed in the grinding chamber by a fixing member; the fixing member has a transverse fixing wall, and the transverse fixing wall is provided with a fixing screw hole; the grinding chamber is provided with a fixing stud corresponding to the fixing screw hole; The tool holder is placed in the grinding chamber in a manner that the inner pen feed hole is opposite to the outer pen feed hole, the fixing screw hole of the fixing member is screwed to the fixing stud, and the transverse fixing wall is used to fix the tool holder in the grinding chamber.

9. The rotary writing tool sharpening device according to claim 7, wherein: The drawer-type connection structure includes a U-shaped avoidance groove provided at the open end of the first shell, and a U-shaped drawer edge provided at the open end of the second shell and matching the U-shaped avoidance groove; A first inserting rib and a first slot are provided in parallel on both sides of the U-shaped avoidance groove, and a second inserting rib and a second slot are provided in parallel on both sides of the U-shaped drawer edge; The first inserting rib is inserted into the second slot, and the second inserting rib is inserted into the first slot, so that the open end of the first shell and the open end of the second shell can be pulled relative to each other to open and close the chip collection chamber; when the chip collection chamber is closed, the U-shaped drawer edge enters the U-shaped avoidance groove, and the open end of the second shell compensates for the opening of the U-shaped drawer edge.

10. The rotary writing tool sharpening device according to claim 9, characterized in that: An inner abutment edge is protruded between the open end of the second shell and the opening of the U-shaped drawer edge; when the open end of the first shell and the open end of the second shell are pulled relative to each other, the inner abutment edge moves in the grinding chamber; When the chip collecting chamber is closed, the inner abutment abuts against one inner wall of the first shell; when the chip collecting chamber is opened, the inner abutment abuts against the other inner wall of the first shell.

11. The rotary writing tool sharpening device according to claim 1, wherein: The first end and the second end of the shell are provided with rounded corners on both sides, and the rounded corners facilitate the first end and the second end to enter the sleeve cavity; Arc-shaped grooves are formed on the front and rear sides of the first end and the second end of the shell, and the arc-shaped grooves are used to limit the depth of the first end and the second end entering the sleeve inner cavity.

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