Propelling pencil with pencil lead sharpening structure

Abstract

The utility model discloses a propelling pencil with a pencil lead sharpening structure, which comprises a pencil body, and the pencil body is provided with a front end extending out of a pencil lead. The pen cap is arranged at the front end of the pen body in a sleeved mode so that the pencil lead extending out of the pen body can be arranged in the pen cap in a covering mode. The pencil sharpening mechanism is arranged in the pencil cap, so that after the pencil cap is arranged at the front end of the pencil body in a sleeving mode, the pencil lead can stretch into the pencil sharpening mechanism, and a storage cavity for storing cut-off carbon powder is reserved between the pencil sharpening mechanism and the pencil cap; the valve clack is arranged in the pen cap, and the valve clack is located in front of an inlet of the pencil sharpening mechanism so as to seal off the connection between the storage cavity where the pencil sharpening mechanism is located and the outside. By means of the structure, the automatic pencil with the pencil lead sharpening function effectively overcomes the defects of an existing automatic pencil with the pencil lead sharpening function, and the use experience is improved.

Description

Technical Field

[0001] The utility model relates to a mechanical pencil, in particular to a mechanical pencil with a pencil core sharpening structure. Background Art

[0002] Mechanical pencils are commonly used office supplies. The lead specifications of existing mechanical pencils are usually 0.5mm, 0.7mm, 0.9mm, etc. The lead of this specification can maintain normal writing for a long time without sharpening. However, there are also some mechanical pencils with thick leads with special functions, and the lead specifications can be 2mm, 3.15mm, etc. After using the mechanical pencils with thick leads for a period of time, the lead needs to be sharpened. The existing tool for sharpening the lead is a pencil sharpener, and for convenience, there is already a structure for fixing the pencil sharpener on the pen cap. For example, the thick-core automatic pencil with the function of sharpening and collecting lead disclosed in Patent No.: CN201620809451.4 comprises a pen shaft and a pen tip connected by threads, and is characterized in that: a pen cap is mounted on the pen tip, one end of the pen cap is open and the other end is provided with a lead storage chamber, at least one inclined blade is installed on the inner wall of the pen cap, a lead powder leakage prevention device is provided on the inner wall of the pen cap between the blade and the open end of the pen cap, a pen cap limiting device is provided on the pen shaft, and a screw-on thread is provided between the pen cap and the pen tip.

[0003] It should be noted that although the above scheme facilitates the sharpening of the lead core. However, there are still certain problems during use. Specifically, after the lead core is sharpened in the above scheme, the shaved carbon powder is temporarily stored in the pen cap, and as the mechanical pencil is pulled out, this part of the carbon powder will scatter from the gap of the blade and fall on the inner wall of the pen cap. At this time, if the mechanical pencil is inserted into it again, the outside of the mechanical pencil will inevitably be full of carbon powder, which not only pollutes the mechanical pencil, but also the carbon powder will be stained on the fingers when the fingers hold the pen. The final adverse effect is that the user will abandon the pen cap with the core sharpening function and carry an extra pencil sharpener, which is very inconvenient. Utility Model Content

[0004] The utility model aims to provide a mechanical pencil with a lead sharpening structure, so as to solve the problem in the prior art that carbon powder will scatter into the pen cap after the lead sharpening is completed.

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

[0006] A mechanical pencil with a pencil sharpening structure, comprising

[0007] A pen body, the pen body having a front end extending out of the lead core;

[0008] A pen cap, which is sleeved on the front end of the pen body to cover the lead core extending from the pen body;

[0009] A pencil curling mechanism, the pencil curling mechanism being arranged in the pen cap so that after the pen cap is sleeved on the front end of the pen body, the lead can be inserted into the pencil curling mechanism, and a storage cavity for storing the shaved carbon powder is left between the pencil curling mechanism and the pen cap;

[0010] The valve flap is arranged in the pen cap and is located in front of the entrance of the pencil winding mechanism to seal off the connection between the storage cavity where the pencil winding mechanism is located and the outside.

[0011] Preferably, the pen cap comprises a sleeve and a cap cover, the cap cover is detachably connected to the sleeve, and the pencil winding mechanism is fixedly connected to an end of the sleeve and extends into the cap cover to form a storage chamber for carbon powder.

[0012] Preferably, a stepped hole is provided inside the end of the sleeve connected to the pencil winding mechanism, and the diameter of the stepped hole gradually decreases from the side away from the pencil winding mechanism to the side close to the pencil winding mechanism; the valve flap has a stepped structure and is embedded in the stepped hole.

[0013] Preferably, a check ring is arranged in the stepped hole, and the inner diameter of the check ring is smaller than the outer diameter of the portion of the valve flap embedded in the stepped hole.

[0014] Preferably, a plurality of spoke-shaped dividing lines are provided at the center of the valve flap.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. In this solution, a valve flap is provided in the pen cap to seal the pencil curling mechanism in the storage chamber, thereby ensuring that the carbon powder shaved off can be stored in the storage chamber when the pencil lead is sharpened, and even when the pencil lead is withdrawn from the pencil curling mechanism and the valve flap at a later time, the carbon powder will not fall into the pen cap and cause pollution to the inside of the pen cap and the outer surface of the pen body, which greatly improves the user experience of the existing automatic pencil with pencil lead sharpening function.

[0017] 2. The pen cap adopts a detachable structure of sleeve and cap, so that the shaved toner can be cleaned immediately to avoid saturation of storage.

[0018] 3. A stepped hole is provided and the valve flap is embedded in the stepped hole to prevent the valve flap from being pushed into the pencil winding mechanism due to multiple insertions of the pencil lead.

[0019] 4. A stop ring is provided to prevent the valve disc from being pulled out when the lead core is pulled out.

[0020] 5. The center of the valve plate is provided with spoke-shaped dividing lines to form a closed hole structure for the pen core to pass through conveniently, so as to facilitate the slightly deflected pen core to push open the divided valve disc and then be inserted into the pencil winding mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the connection between the sleeve in the pen cap part and the pen winding mechanism in the utility model;

[0023] Figure 3 It is a structural schematic diagram of the valve disc in the utility model.

[0024] Reference numerals: 100. pen body 200. pen cap 210. cap cover 211. storage chamber 220. sleeve 221. stepped hole 222. stop ring 300. pencil winding mechanism 400. valve flap 410. dividing line. DETAILED DESCRIPTION

[0025] 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.

[0026] 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.

[0027] 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.

[0028] like Figures 1 to 3The mechanical pencil with a lead sharpening structure shown in the figure comprises a pen body 100, in which the thick lead of the mechanical pencil is installed, and can be extended from the front end of the pen body by pressing the tail end thereof. At the same time, a pen cap 200 is also sleeved on the front end of the pen body, and after the pen cap is sleeved on the front end of the pen body, the end of the thick lead for writing extending from the pen body is covered therein. In addition, it should be noted that, if Figure 1 As shown, a pencil sharpener mechanism 300 is also installed in the pen cap, and the pencil sharpener mechanism can be in the form of a conventional pencil sharpener to achieve installation in the pen cap. Figure 1 As shown, there is a certain space between the pencil reel mechanism and the closed end of the pen cap. After the valve flap 400 placed in the pen cap seals the pencil reel mechanism, a storage chamber 211 for storing the carbon powder cut off the pen core is formed. It should be noted that in this solution, the valve flap is made of a material with a certain elasticity (such as rubber, silicone, etc.). And a closed hole (i.e., a through channel, which is often in a closed state under the extrusion of the elastic material) is opened in the middle of the valve flap, so that after the thick lead core presses the valve flap, it can pass through the closed hole and be inserted into the pencil reel mechanism 300 blocked by the valve flap. At this time, the pencil reel mechanism can sharpen the thick lead core by simply rotating the pen cap and the pen body relative to each other. It should be noted that because the valve flap is made of elastic material, when the thick lead core passes through the closed hole, the valve flap can be tightened on the outer surface of the lead core to prevent the carbon powder cut off from falling out of the closed hole and falling on the inner wall of the pen cap and the outer surface of the pen body.

[0029] In addition, it should be noted that in the above scheme, although there is a storage chamber to store the shaved carbon powder. However, the space of the storage chamber is limited after all. After sharpening the pencil for a long time, the storage space will inevitably be full, and at this time, the carbon powder in the storage chamber 211 needs to be discharged in time. In order to facilitate the discharge of carbon powder, the pen cap is a split structure. Specifically, the pen cap includes a sleeve 220 part sleeved on the front end of the pen body and a cap 210 part detachably connected to the sleeve. Specifically, the sleeve and the cap can be connected by a buckle or a thread. The pencil curling mechanism 300 in this scheme is fixedly connected to the front end of the sleeve, and except for the entrance part for the lead core to enter, the rest are closed to further ensure that the shaved carbon powder can remain in the storage chamber. It should be noted that in this scheme, except for the part connected to the sleeve, the rest of the pencil curling mechanism is inserted into the cap to ensure that the shaved carbon powder can fall into the storage chamber.

[0030] In addition, it is also necessary to explain that in order to facilitate fixing the valve flap in the pen cap and prevent the valve flap from being driven by the lead when inserting and pulling out the pen body. In this solution, the end of the sleeve connected to the pencil winding mechanism has a stepped hole 221 structure inside. The valve flap 400 is also stepped and embedded in the stepped hole 221 with friction. It should be noted that in order to prevent the valve flap from being pushed forward by the inserted lead, the aperture of the stepped hole gradually decreases from the side away from the pencil winding mechanism to the side close to the pencil winding mechanism. In addition, it is also necessary to explain that in order to prevent the lead from pulling the valve flap out of the pen cap when the pen body is pulled out, the valve flap and the sleeve are interference fit to ensure that the friction between the valve flap and the sleeve is greater than the friction between the lead and the valve flap.

[0031] On the basis of the above embodiment, in order to prevent the valve disc from retreating from the stepped hole, a stop ring 222 is further provided in the stepped hole. Specifically, the inner diameter of the stop ring is smaller than the outer diameter of the portion of the valve disc embedded in the stepped hole 221, so as to form a blocking effect on the end face of the valve disc.

[0032] In addition, it should be noted that if the valve flap adopts a simple axially through closed hole structure, the lead core is very likely to be misaligned with the closed hole because the closed hole is small, and the lead core cannot pass through the valve flap and enter the pencil winding mechanism. In order to improve this situation, the present scheme is to set a number of dividing lines 410 at the center of the valve flap, and these dividing lines are aligned with the midpoint of the lead core as the center of the circle, and are spread out in a spoke-like manner to divide the valve flap into pieces of fan-shaped membrane flaps. Then, when the lead core is not aligned with the closed hole after the pen body is inserted, the operation of passing through the valve flap can be achieved by pushing open a piece of membrane flap.

[0033] Working principle: When the lead needs to be sharpened, the pen body is inserted into the pen cap. At this time, the lead extending from the front end of the pen body passes through the closed hole on the valve disc and is inserted into the pencil curling mechanism. Then the pen cap or the pen body is rotated so that the pencil curling mechanism rotates outside the lead, and the pencil curling mechanism then sharpens the lead. It should be noted that the carbon powder generated by sharpening the lead enters the storage chamber and is stored, and the carbon powder can be poured out later by separating the cap from the sleeve. When the lead is sharpened, the pen body can be pulled out. At this time, the lead also exits the pencil curling mechanism and the valve disc. The closed hole of the valve disc can rebound and reclose due to its own material, ensuring that the carbon powder in the storage chamber will not leak out of the closed hole on the valve disc and fall onto the inner wall of the pen cap and the outer surface of the pen body, keeping the pen cap and the pen body clean after sharpening, greatly improving the user experience of the existing automatic pencil with a sharpening structure. Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical pencil with a lead sharpening structure, characterized in that: include A pen body (100), the pen body (100) having a front end extending out of the lead core; A pen cap (200), the pen cap (200) being sleeved on the front end of the pen body (100) so as to cover the lead core extending from the pen body (100); A pencil curling mechanism (300), the pencil curling mechanism (300) being arranged in a pen cap (200), so that after the pen cap (200) is sleeved on the front end of the pen body (100), the pencil lead can be inserted into the pencil curling mechanism (300), and a storage cavity (211) is left between the pencil curling mechanism (300) and the pen cap (200) for storing shaved carbon powder; A valve flap (400) is arranged in the pen cap (200), and the valve flap (400) is located in front of the entrance of the pencil winding mechanism (300) to block the connection between the storage cavity (211) where the pencil winding mechanism (300) is located and the outside.

2. The mechanical pencil with a lead sharpening structure as claimed in claim 1, characterized in that: The pen cap (200) comprises a sleeve (220) and a cap (210), wherein the cap (210) is detachably connected to the sleeve (220), and the pen winding mechanism (300) is fixedly connected to the end of the sleeve (220) and extends into the cap (210) to form a storage chamber (211) for carbon powder.

3. The mechanical pencil with a lead sharpening structure as claimed in claim 2, characterized in that: The sleeve (220) is connected to one end of the pencil winding mechanism (300) and is provided with a stepped hole (221) therein, the diameter of the stepped hole (221) gradually decreasing from the side away from the pencil winding mechanism (300) to the side close to the pencil winding mechanism (300); the valve flap (400) is in a stepped structure and is embedded in the stepped hole (221).

4. The mechanical pencil with a lead sharpening structure as claimed in claim 3, characterized in that: A stop ring (222) is also arranged in the stepped hole (221), and the inner diameter of the stop ring (222) is smaller than the outer diameter of the portion of the valve flap (400) embedded in the stepped hole (221).

5. The mechanical pencil with a lead sharpening structure as claimed in claim 1, characterized in that: A plurality of spoke-shaped dividing lines (410) are provided at the center of the valve flap (400).

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