Multi-functional mechanical pencil

Abstract

The application discloses a multifunctional automatic pencil, which comprises a pencil rod assembly, a pencil core assembly, a rotating mechanism and an automatic core discharging mechanism, wherein the pencil rod assembly comprises a pencil body, a pencil grip and a pencil tip, the top end of the pencil grip is detachably connected with the bottom end of the pencil body, and the bottom end of the pencil grip is detachably connected with the pencil tip. The technical effects are as follows: during use, the automatic core discharging mechanism can bring an immersive writing experience, and the traditional pressing and pulling cap mechanism can also be used to discharge the pencil core; when the pencil core is pressed for too long, the pencil core can be retracted by pressing and pulling the cap; when the automatic core discharging mechanism is used for writing, the longest core discharging length of the pencil core can be well controlled, and the pencil core can be effectively prevented from being broken due to too much pressing force; the center of gravity is concentrated near the pencil tip, a low center of gravity design is formed, and the writing can be labor-saving and steady; the pencil core can be rotated when the pencil is lifted after being pressed during writing, the design can ensure that the thickness of the writing is uniform, and the pencil core can be prevented from being worn on one side to make the writing thicker and thicker.

Description

TECHNICAL FIELD

[0001] The present application relates to stationery technical field, specifically to a multifunctional mechanical pencil. BACKGROUND

[0002] The mechanical pencil belongs to the commonly used stationery, and the existing mechanical pencil on the market mainly has four kinds, which are push-to-core type mechanical pencil, push-to-core type + low gravity mechanical pencil, automatic compensation type mechanical pencil and push-to-core type + anti-core breaking mechanical pencil. The four kinds of mechanical pencils have the following shortcomings in the use process respectively.

[0003] 1. Shortcomings of push-to-core type mechanical pencil

[0004] 1.1. The push-to-core type mechanical pencil is pressed to add core by pressing the cap, and the frequent pressing to add core during use will make the user's attention shift from writing.

[0005] 1.2. The length of the push-to-core type mechanical pencil is uncontrollable, and too many cores are easy to break.

[0006] 1.3. The pencil tip is designed of plastic, without low gravity design, and does not have the advantage of low gravity writing.

[0007] 1.4. The core is worn on one side during writing, and the line will become thick from thin, causing the font line on the article to be not uniform.

[0008] 2. Shortcomings of push-to-core type + low gravity mechanical pencil

[0009] 2.1. The push-to-core type + low gravity mechanical pencil needs to be pressed to add core frequently during use, which will make the user's attention shift from writing.

[0010] 2.2. The length of the push-to-core type + low gravity mechanical pencil is uncontrollable, and too many cores are easy to break.

[0011] 2.3. The core is worn on one side during writing, and the line will become thick from thin, causing the font line on the article to be not uniform.

[0012] 3. Shortcomings of automatic compensation type mechanical pencil

[0013] 3.1. The pencil tip of the automatic compensation type mechanical pencil is designed of plastic, without low gravity design, and does not have the advantage of low gravity writing.

[0014] 3.2. The amount of lead pulled out by the core protection pipe of the automatic compensation type mechanical pencil is uncontrollable, and the length of the core is easy to break when the pressing force on the paper surface is large, and the core is not enough when the pressing force on the paper surface is small, which will cause the writing to be too light.

[0015] 3.3. The core is worn on one side during writing, and the line will become thick from thin, causing the font line on the article to be not uniform.

[0016] 4. Shortcomings of push-to-core type + anti-core breaking mechanical pencil

[0017] 4.1, the need to frequently press the refill when using will divert the user's attention from writing.

[0018] 4.2, the lead core is worn on one side when writing, and the line of writing will become thick from thin, causing the font line of writing to be inconsistent.

[0019] 4.3, the spring buffer can protect the lead core to a certain extent, but the spring buffer protects the vertical direction, and since the writing angle is generally 50° to 60°, the lead core cannot be well protected against horizontal force impact. SUMMARY

[0020] Therefore, the present application provides a multifunctional automatic pencil to solve the above problems in the prior art.

[0021] In order to achieve the above purpose, the present application provides the following technical scheme:

[0022] According to the first aspect of the present application, a multifunctional automatic pencil comprises a pencil shaft assembly, a pencil core assembly, a rotating mechanism and an automatic core feeding mechanism, the pencil shaft assembly comprises a pencil body, a pencil grip and a pencil tip, the top end of the pencil grip is detachably connected with the bottom end of the pencil body, and the bottom end of the pencil grip is detachably connected with the pencil tip;

[0023] The pencil core assembly comprises a push cap, a lead pipe, a push cap spring, a chuck assembly and a lead pipe protector, the lead pipe is arranged in the pencil body along the axis of the pencil body, and the bottom end of the lead pipe extends into the pencil grip, the push cap is arranged at the top end of the lead pipe, the push cap extends out of the pencil body, and the outer side wall of the top end of the lead pipe is provided with the push cap spring; the chuck assembly is arranged at the bottom end of the lead pipe, the top end of the lead pipe protector is located in the pencil tip, the bottom end of the lead pipe protector extends out of the pencil tip, and the lead pipe, the chuck assembly and the lead pipe protector are arranged in sequence along the axis of the pencil shaft assembly;

[0024] The rotating mechanism comprises a pressing block, a pressing block spring, a rotating mechanism shell and a fixed lining, the pressing block is cylindrical, the pressing block is arranged in the pencil grip, and the pressing block is sleeved on the lead pipe, and the pressing block spring is sleeved on the pressing block; the rotating mechanism shell is cylindrical, the outer side wall of the rotating mechanism shell is provided with a first annular boss and a second annular boss, the first annular boss and the second annular boss are respectively provided with upper inclined teeth and lower inclined teeth, the fixed lining is sleeved in the pencil grip, and the fixed lining is fixedly connected with the pencil grip, the inner side wall of the pencil grip is provided with first inclined teeth, the outer side wall of the fixed lining is provided with second inclined teeth, and the upper inclined teeth and the lower inclined teeth are respectively arranged in one-to-one correspondence with the first inclined teeth and the second inclined teeth;

[0025] The automatic core mechanism comprises a sleeve, a silica gel damper and a pen point spring, the sleeve and the silica gel damper are coaxially arranged, the bottom end of the sleeve is provided with an annular sliding groove along the axial direction thereof, the top end of the core protection pipe is slidingly arranged in the annular sliding groove, the core protection pipe is slidingly connected with the pen point, the pen point spring is sleeved on one end of the core protection pipe located in the pen point, and the silica gel damper is arranged in the core protection pipe.

[0026] Further, the pencil core assembly further comprises a pipe sleeve, two ends of the pipe sleeve are connected with the core entering pipe and the clamping head assembly respectively.

[0027] Further, the clamping head assembly comprises a clamping head, a core spring, a steel ball, a taper sleeve and a core sealing ring, the top end of the clamping head is connected with the bottom end of the pipe sleeve, the core spring is sleeved outside the clamping head, the taper sleeve is sleeved outside the core spring and the clamping head, and the core sealing ring is arranged at the bottom end of the taper sleeve.

[0028] The clamping head comprises a first clamping head and a second clamping head, the first clamping head and the second clamping head form a columnar structure, one steel ball is arranged on the first clamping head and the second clamping head respectively, and the steel ball abuts against the side wall of the taper sleeve.

[0029] Further, vertical ribs are arranged on the outer side wall of the pressing block, a sliding groove is arranged on the inner side wall of the pencil grip, and the vertical ribs are slidingly arranged in the sliding groove.

[0030] Further, the bottom end of the pressing block is provided with a plurality of circular convex points.

[0031] Further, the distance between the top end of the core protection pipe and the top wall of the annular sliding groove is 1mm to 2mm.

[0032] Further, a rubber and a rubber seat are further included, the rubber seat is arranged at the top end of the core entering pipe, the rubber is arranged on the rubber seat, the cap is inserted into the rubber seat, and the rubber is located in the cap.

[0033] Further, the cap spring is sleeved on the rubber seat.

[0034] Further, a pen clamp is further included, and the pen clamp is arranged on the pen body.

[0035] Further, the pen body, the pencil grip and the pen point are sequentially threadedly connected.

[0036] The present application has the following advantages: by setting the cap and automatic core mechanism, when using, the lead core can be automatically taken out through the core tube contraction (automatic core extraction without pressing) to bring immersive writing experience, and the lead core can also be taken out by pressing the cap, and the lead core can also be retracted by pressing the cap when the pressing is too long. When writing in the automatic core extraction mode, the longest core extraction amount of the lead core can be well controlled, which can effectively prevent the lead core from breaking due to excessive pressing force. The center of gravity is concentrated near the pen tip, forming a low gravity design, which can save labor and write stably. By setting the rotating mechanism, the core position is engaged by the upper and lower inclined teeth, and the lead core can be rotated when the pen is lifted after pressing during writing. This design can ensure the uniformity of the line thickness during writing and prevent the lead core from grinding the single side of the line and becoming thicker. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only exemplary, and those skilled in the art can also obtain other implementation drawings according to the provided drawings without creating labor.

[0038] The structures, proportions, sizes, etc. shown in the specification are only used to cooperate with the content disclosed in the specification, to be understood and read by those skilled in the art, and do not define the limiting conditions for the implementation of the present application, so they do not have technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effect and purpose that can be achieved by the present application, should still fall within the scope of the technical content disclosed by the present application.

[0039] Figure 1 An overall structure schematic diagram of a multifunctional automatic pencil is provided for some embodiments of the present application.

[0040] Figure 2 A cross-sectional view of a multifunctional automatic pencil is provided for some embodiments of the present application.

[0041] Figure 3 For Figure 2 A local enlarged view of the top end.

[0042] Figure 4 For Figure 2 A local enlarged view of the bottom end.

[0043] Figure 5 A local structure schematic diagram of a multifunctional automatic pencil is provided for some embodiments of the present application Figure 1 .

[0044] Figure 6A partial structure diagram of a multifunctional mechanical pencil provided by some embodiments of the present application Figure 2 .

[0045] Figure 7 A partial structure diagram of a multifunctional mechanical pencil provided by some embodiments of the present application Figure 3 .

[0046] Figure 8 A partial structure diagram of a multifunctional mechanical pencil provided by some embodiments of the present application Figure 4 .

[0047] In the figure: 1, cap, 2, eraser, 3, pencil clip, 4, cap spring, 5, eraser seat, 6, pencil body, 7, lead pipe, 8, lead, 9, pencil grip, 10, pressure block, 11, pressure block spring, 12, sleeve, 13, rotating shell, 14, spring, 15, first clamping head, 16, second clamping head, 17, steel ball, 18, fixed lining, 19, taper sleeve, 20, core seal ring, 21, pencil tip, 22, seal sleeve, 23, pencil tip spring, 24, lead pipe protector, 25, silica gel damper, 26, upper inclined teeth, 27, lower inclined teeth, 28, annular sliding groove. DETAILED DESCRIPTION

[0048] The embodiments of the present application will be described in detail by the following specific embodiments, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in the specification. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0049] Embodiment 1

[0050] As shown in Figures 1 to 8 , the multifunctional mechanical pencil in the first aspect of the present application comprises a pencil shaft assembly, a lead assembly, a rotating mechanism and an automatic lead mechanism, the pencil shaft assembly comprises a pencil body 6, a pencil grip 9 and a pencil tip 21, the top end of the pencil grip 9 is detachably connected with the bottom end of the pencil body 6, and the bottom end of the pencil grip 9 is detachably connected with the pencil tip 21;

[0051] The refill assembly comprises a cap 1, a refill tube 7, a cap spring 4, a chuck assembly and a core protection tube 24, the refill tube 7 is arranged in the pen body 6 along the axis of the pen body 6, and the bottom end of the refill tube 7 extends into the pen grip 9, the cap 1 is arranged at the top end of the refill tube 7, the cap 1 extends out of the pen body 6, and the outer side wall of the top end of the refill tube 7 is provided with the cap spring 4; the chuck assembly is arranged at the bottom end of the refill tube 7, the top end of the core protection tube 24 is located in the pen tip 21, the bottom end of the core protection tube 24 extends out of the pen tip 21, and the refill tube 7, the chuck assembly and the core protection tube 24 are arranged along the axis of the pen barrel assembly in sequence.

[0052] The rotating mechanism comprises a pressing block 10, a pressing block spring 11, a rotating mechanism shell 13 and a fixed lining 18, the pressing block 10 is cylindrical, the pressing block 10 is arranged in the pen grip 9, and the pressing block 10 is sleeved on the refill tube 7, the pressing block spring 11 is sleeved on the pressing block 10, specifically, the pressing block spring 11 is sleeved on the upper end of the pressing block 10, the pressing block 10 is loaded from the lower end of the pen grip 9, and the pressing block is elastically moved up and down after the buckling position of the pressing block 10 and the buckling position of the pen grip 9 are matched with each other; the rotating mechanism shell 13 is cylindrical, the outer side wall of the rotating mechanism shell 13 is provided with a first annular boss and a second annular boss, the first annular boss and the second annular boss are respectively provided with an upper inclined tooth 26 and a lower inclined tooth 27, the fixed lining 18 is sleeved in the pen grip 9, and the fixed lining 18 and the pen grip 9 are fixedly connected, the inner side wall of the pen grip 9 is provided with a first inclined tooth, and the outer side wall of the fixed lining 18 is provided with a second inclined tooth, and the upper inclined tooth 26 and the lower inclined tooth 27 are respectively arranged in one-to-one correspondence with the first inclined tooth and the second inclined tooth.

[0053] The operating principle of the rotating mechanism is as follows: when the chuck assembly and the fixed lining 18 are assembled, the inclined tooth surfaces on the bosses are matched with each other, vertical ribs are arranged in the inner hole of the fixed lining 18 for direction limiting, and the fixed lining 18 and the pen grip 9 are fixedly connected through reverse buckling. After assembly, the fixed lining 18 is fixed and does not move. When writing, the rotating mechanism shell 13 moves upward, the upper end inclined tooth of the rotating mechanism shell 13 and the upper end inclined tooth of the pen grip 9 are inserted into each other to complete rotation (at this time, the pressing block pre-presses the rotating mechanism shell), when the pen is lifted, the pressing block 10 is reset due to the rebound force of the pressing block spring 11, the lower end inclined tooth of the rotating mechanism shell 13 and the inclined tooth of the fixed lining 18 are inserted into each other to complete rotation. Because the chuck assembly holds the lead core 8 at this time, the rotating mechanism shell 13 rotates while synchronously rotating the lead core to drive the lead core, so as to achieve the rotation purpose of the lead core.

[0054] The automatic core ejection mechanism comprises a sleeve 22, a silica gel damper 25 and a pen tip spring 23, the sleeve 22 and the silica gel damper 25 are coaxially arranged, the bottom end of the sleeve 22 is provided with an annular sliding groove 28 along the axis of the sleeve 22, the top end of the core protection tube 24 is slidably arranged in the annular sliding groove 28, the core protection tube 24 is slidably connected with the pen tip 21, the pen tip spring 23 is sleeved on one end of the core protection tube 24 located in the pen tip 21, the silica gel damper 25 is arranged in the core protection tube 24, and in the use state, the lead core 8 passes through the sleeve 22 and the silica gel damper 25 in sequence.

[0055] In this embodiment, it should be noted that the outer side wall of the pressure block 10 is provided with vertical ribs, and the inner side wall of the pen grip 9 is provided with a sliding groove. The vertical ribs are slidably disposed in the sliding groove to ensure that the pressure block 10 can only move in one direction. The bottom end of the pressure block 10 is provided with multiple circular protrusions. This design can reduce the contact friction between the pressure block 10 and the upper surface of the rotating housing 13, and prevent the rotating housing 13 from failing to rotate due to excessive surface-to-surface contact friction when it rotates.

[0056] Furthermore, the distance between the top of the lead protector tube 24 and the top wall of the annular groove 28 is 1mm to 2mm, which can control the lead 8 to automatically extend 1mm to 2mm each time, thereby avoiding excessive lead extension which could cause it to break easily during writing.

[0057] The technical effects achieved in this embodiment are as follows: By setting the snap cap 1 and the automatic lead-out mechanism, during use, the lead 8 can be automatically extended by retracting the lead protector tube 24 (automatic lead-out without pressing), providing an immersive writing experience. Alternatively, the lead 8 can be extended by pressing the snap cap 1 in the traditional way. If the lead 8 is pressed too far, it can be retracted by pressing the snap cap 1. When writing with the automatic lead-out method, the maximum extension of the lead 8 can be well controlled, effectively preventing the lead from breaking due to excessive extension caused by excessive pressing pressure. The center of gravity is concentrated near the pen tip 21, forming a low center of gravity design, which makes writing effortless and stable. By setting a rotating mechanism, the movement position is engaged by the interlocking of upper and lower oblique teeth, allowing the lead to rotate when the pen is lifted after pressing during writing. This design ensures uniform line thickness during writing and prevents the lead from wearing down one side of the line, making the line thicker over time.

[0058] Example 2

[0059] like Figures 1 to 8 As shown in the figure, another multifunctional mechanical pencil provided in this embodiment has the same structure as in embodiment 1. Only the different parts are described below.

[0060] In this embodiment, the pen refill assembly also includes a sleeve 12, the two ends of which are connected to the inlet tube 7 and the card head assembly, respectively.

[0061] In this embodiment, it should be noted that the chuck assembly includes a chuck, a core spring 14, a steel ball 17, a conical sleeve 19, and a core sealing ring 20. The top end of the chuck is connected to the bottom end of the sleeve 12. The core spring 14 is sleeved on the outside of the chuck, the conical sleeve 19 is sleeved on the outside of the core spring 14 and the chuck, and the core sealing ring 20 is located at the bottom end of the conical sleeve 19. The lower part of the rotating housing 13 is tightly fitted into the conical sleeve 19.

[0062] The clamp includes a first clamp 15 and a second clamp 16, which together form a columnar structure. A steel ball 17 is provided on the first clamp 15 and the second clamp 16 respectively, and the steel ball 17 abuts against the side wall of the conical sleeve 19.

[0063] The assembly of the chuck assembly is as follows: the first chuck 15 and the second chuck 16 are assembled together and then fitted into the spring 14 of the core, at this time, the assembly is fitted into the inner hole of the rotating shell 13 from top to bottom and pressed down to expose the groove at the end of the conical sleeve 19, then the two steel balls 17 are placed in the corresponding position, and finally the spring 14 of the core is fitted to complete the assembly. At this time, the core chuck assembly has the function of only coming out of the core and cannot be returned to the core, which is similar to the design of a "one-way valve". When the lead core enters the core, the lead core can only come out of the core in the direction of the pen tip and cannot be retracted (to prevent the lead core from retracting during writing), and only by pressing the cap to press the claw of the core can the lead core be retracted. Since the core seal 20 limits the position, there is no need to worry about the steel ball falling off.

[0064] As shown in Figure 2 and Figure 4 The inside of the core protection tube 24 is plugged with a silica gel damper 25, and the pen tip spring 23 is installed at the step of the core protection tube 24, which is used to write and synchronize the silica gel damper 25 inside the core protection tube 24 to pull out the lead core. The core protection tube assembly is fitted into the inner hole of the pen tip 21 and is buckled and fixed by the pen tip seal sleeve 22 to prevent the core protection tube 24 from falling off, and the upper end surface of the core protection tube 24 and the inner hole of the pen tip seal sleeve 22 have a pressing maximum difference at the corresponding position. This difference can ensure the maximum distance of the lead core length that can be brought out each time, so as to prevent the problem of lead core breakage caused by excessive writing pressure. Finally, the pen tip 21 and the fixed lining 18 are connected by screwing.

[0065] The core coming out action is as follows: after the lead core 8 is installed, the cap 1 is pressed, and at the same time, the lead core 8 is brought into the core due to its own weight. The lead core 8 in the core drives the internal claw to open and close (the first chuck 15 and the second chuck 16) to send the lead core 8 to the pen tip 21 for core coming out. When the lead core 8 is exposed to the core protection tube 24, subsequent normal writing does not need to press the cap 1. When the lead core 8 is worn out to the same level as the core protection tube 24, the core protection tube 24 is pressed by the paper surface, and the silica gel damper 25 inside the core protection tube 24 also presses the internal lead core by a distance. When the core protection tube 24 is away from the paper surface, the pen tip spring 23 can rebound the core protection tube 24, at this time, the silica gel damper 25 can pull out the lead core, thereby completing the automatic core coming out action.

[0066] The technical effect achieved by the embodiment is that when the cap 1 is pressed, the sleeve 12 and the chuck step surface are in contact and are pressed down synchronously, the steel ball 17 moves to the large opening direction of the inclined surface, and at this time, the chuck gradually opens and the lead core is released from being clamped to loose fitting. When the cap 1 is released, the spring 14 of the core is reset, the chuck is closed, and the lead core is released from loose fitting to tight fitting, thereby realizing the following two states:

[0067] 1. When inserting lead 8, press the snap cap 1 to send lead 8 into the mechanism. As the mechanism latch opens and closes, it gradually sends lead 8 into the silicone damper 25. The silicone damper 25 and lead 8 are tightly fitted together. When the latch opens, the friction of the silicone damper 25 can hold lead 8 in place. When the latch closes, lead 8 will not retract and will be held by the silicone damper 25 for a certain distance for writing.

[0068] Therefore, when installing a new lead core 8, after opening the snap cap 1 and inserting the lead core, press the snap cap 1 to make the lead core 8 protrude from the lead core tube 24, and then you can use the automatic lead ejection function to write. Subsequently, you can use the automatic lead ejection method to write without pressing, or you can use the traditional snap cap 1 to press and write.

[0069] 2. If the lead core 8 protrudes too far, press the snap cap 1 to push the lead core back in, preventing dirt and waste of the lead core.

[0070] Example 3

[0071] like Figures 1 to 8 As shown in the figure, another multifunctional mechanical pencil provided in this embodiment has the same structure as in embodiment 2. Only the different parts are described below.

[0072] In this embodiment, a rubber 2 and a rubber seat 5 are also included. The rubber seat 5 is disposed at the top of the core tube 7, the rubber 2 is disposed on the rubber seat 5, the snap cap 1 is inserted into the rubber seat 5, and the rubber 2 is located inside the snap cap 1.

[0073] In this embodiment, it should be noted that the snap cap spring 4 is sleeved on the rubber seat 5. Specifically, from top to bottom, the rubber 2 is elastically and tightly inserted into the inner hole of the rubber seat 5, the snap cap 1 is fixed on the rubber seat 5, and after the snap cap spring 4 is installed on the lower part of the rubber seat 5, it is pressed into the inner hole of the pen barrel 3. The upper end of the core tube 7 is tightly fitted into the inner hole of the lower part of the rubber seat 5. After assembly, the rubber seat 5, rubber 2, snap cap 1, and snap cap spring 4 constitute a pressing assembly, which can achieve up and down spring pressing in the inner hole of the pen barrel of the pen clip 3 and cannot be pulled out.

[0074] The technical effect achieved by this embodiment is that by setting the eraser 2, it is easier to erase and modify during the writing process, making it more convenient to use.

[0075] Example 4

[0076] like Figures 1 to 8 As shown in the figure, another multifunctional mechanical pencil provided in this embodiment has the same structure as in embodiment 1. Only the different parts are described below.

[0077] In this embodiment, a pen clip 3 is also included. The pen clip 3 is disposed on the pen body 6. Specifically, the pen clip 3 is pressed down into the inner hole of the pen body 6.

[0078] In the embodiment, it is to be noted that the pen body 6, the pen grip 9 and the pen point 21 are threadedly connected in sequence, which is more convenient for disassembly and assembly.

[0079] Further, a pen cover is also included, which covers the pen point 21, so as to protect the pen point in non-use state and prevent the pen point from being damaged.

[0080] Although the present application has been described in detail with general description and specific embodiments above, some modifications or improvements can be made on the basis of the present application, which is obvious to those skilled in the art. Therefore, these modifications or improvements made on the basis of not deviating from the spirit of the present application, are within the scope of the present application.

[0081] The terms such as "upper", "lower", "left", "right", "middle" and the like cited in the specification are only for clear description, and are not used to limit the scope of the present application. The change or adjustment of the relative relationship without substantial change of the technical content is also regarded as the scope of the present application.

Claims

1. A multifunctional mechanical pencil, characterized in that, It includes a pen barrel assembly, a pen refill assembly, a rotating mechanism and an automatic refill mechanism. The pen barrel assembly includes a pen body (6), a pen grip (9) and a pen tip (21). The top end of the pen grip (9) is detachably connected to the bottom end of the pen body (6), and the bottom end of the pen grip (9) is detachably connected to the pen tip (21). The pen refill assembly includes a snap cap (1), a refill tube (7), a snap cap spring (4), a clip assembly, and a refill protector tube (24). The refill tube (7) is disposed inside the pen body (6) along the axis of the pen body (6), and the bottom end of the refill tube (7) extends into the pen grip (9). The snap cap (1) is disposed at the top end of the refill tube (7), and the snap cap (1) extends outside the pen body (6). The snap cap spring (4) is provided on the outer side wall of the top end of the refill tube (7). The clip assembly is disposed at the bottom end of the refill tube (7). The top end of the refill protector tube (24) is located inside the pen tip (21), and the bottom end of the refill protector tube (24) extends outside the pen tip (21). The refill tube (7), the clip assembly, and the refill protector tube (24) are arranged sequentially along the axis of the pen body assembly. The rotating mechanism includes a pressure block (10), a pressure block spring (11), a rotating housing (13), and a fixed inner liner (18). The pressure block (10) is cylindrical and is disposed inside the pen grip (9), and is sleeved on the core inlet tube (7). The pressure block spring (11) is sleeved on the pressure block (10). The rotating housing (13) is cylindrical, and a first annular boss and a second annular boss are provided on the outer side wall of the rotating housing (13). The first annular boss and the second annular boss are respectively provided with upper oblique teeth (26) and lower oblique teeth (27). The fixed inner liner (18) is sleeved inside the pen grip (9), and the fixed inner liner (18) and the pen grip (9) are fixedly connected. The inner side wall of the pen grip (9) is provided with a first oblique tooth, and the outer side wall of the fixed inner liner (18) is provided with a second oblique tooth. The upper oblique tooth (26) and the lower oblique tooth (27) are respectively provided in a one-to-one correspondence with the first oblique tooth and the second oblique tooth. The automatic lead feeding mechanism includes a sleeve (22), a silicone damper (25), and a pen tip spring (23). The sleeve (22) and the silicone damper (25) are coaxially arranged. The bottom end of the sleeve (22) is provided with an annular groove (28) along its axial direction. The top end of the lead protector tube (24) is slidably disposed in the annular groove (28). The lead protector tube (24) is slidably connected to the pen tip (21). The pen tip spring (23) is sleeved on one end of the lead protector tube (24) located inside the pen tip (21). The silicone damper (25) is disposed in the lead protector tube (24). In use, the lead (8) passes through the sleeve (22) and the silicone damper (25) in sequence. The distance between the top end of the lead protector tube (24) and the top wall of the annular groove (28) is 1 mm to 2 mm. The pen refill assembly also includes a sleeve (12), the two ends of which are connected to the inlet tube (7) and the clip assembly, respectively; The chuck assembly includes a chuck, a core spring (14), a steel ball (17), a conical sleeve (19), and a core sealing ring (20). The top end of the chuck is connected to the bottom end of the sleeve (12). The core spring (14) is sleeved on the outside of the chuck. The conical sleeve (19) is sleeved on the outside of the core spring (14) and the chuck. The core sealing ring (20) is located at the bottom end of the conical sleeve (19). The clamp includes a first clamp (15) and a second clamp (16). The first clamp (15) and the second clamp (16) together form a columnar structure. The first clamp (15) and the second clamp (16) are respectively provided with a steel ball (17). The steel ball (17) abuts against the side wall of the conical sleeve (19).

2. A multifunctional mechanical pencil according to claim 1, characterized in that, The outer side wall of the pressure block (10) is provided with vertical ribs, and the inner side wall of the pen grip (9) is provided with a sliding groove, and the vertical ribs are slidably disposed in the sliding groove.

3. A multifunctional mechanical pencil according to claim 1, characterized in that, The bottom end of the pressure block (10) is provided with multiple circular protrusions.

4. A multifunctional mechanical pencil according to claim 1, characterized in that, It also includes a rubber (2) and a rubber seat (5), the rubber seat (5) being disposed at the top of the core tube (7), the rubber (2) being disposed on the rubber seat (5), the snap cap (1) being inserted into the rubber seat (5), and the rubber (2) being located inside the snap cap (1).

5. A multifunctional mechanical pencil according to claim 4, characterized in that, The snap cap spring (4) is sleeved on the rubber seat (5).

6. A multifunctional mechanical pencil according to claim 1, characterized in that, It also includes a pen clip (3), which is disposed on the pen body (6).

7. A multifunctional mechanical pencil according to claim 1, characterized in that, The pen body (6), the pen grip (9), and the pen tip (21) are connected by threads in sequence.

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