A mechanical propelling pencil

Abstract

The present application relates to a kind of pen, especially relates to a kind of automatic pencil for solving the problem of existing automatic pencil operation complex, provide a more efficiency, more novel lifting operation, that is, lead can be out, provide additional convenient operation of lifting synchronous extension rubber, immediately use, reduce operation, improve efficiency, also have the function of rotating adjustment rubber extension length of a kind of automatic pencil for lifting including automatic lead module and telescopic sleeve group;The telescopic sleeve group includes mutually telescopic sleeve and connects front rod and rear rod;Positioning core is arranged in the rear rod;The automatic lead module is located in telescopic sleeve group, specifically between front rod and positioning core.This application is convenient to operate, component is few, and rubber function can be increased, to achieve lifting and out simultaneously and facilitate use.

Description

Technical Field

[0001] This invention relates to a pen, and more particularly to a pull-out mechanical pencil. Background Technology

[0002] With the development of the times and the advancement of technology, pencils have evolved from simple wooden structures that required manual sharpening to mechanical pencils that do not require manual sharpening and can be pressed to produce leads, greatly increasing efficiency.

[0003] With the development of technology, people are no longer satisfied with just basic needs and are seeking more efficient and feature-rich mechanical pencils. Summary of the Invention

[0004] The purpose of this invention is to solve the problem of cumbersome operation of existing mechanical pencils, and to provide a more efficient and novel pull-out mechanical pencil that allows the lead to be extended by simply pulling it out, provides an additional convenient operation by simultaneously extending the eraser while pulling it out, and also has a function to adjust the length of the extended eraser by rotating it.

[0005] To achieve the above-mentioned objectives, the present invention adopts the following technical solution: A pull-out mechanical pencil includes an automatic lead module and a telescopic sleeve; The telescopic assembly includes a front rod and a rear rod that telescopically connect with each other; the rear rod is provided with a positioning core. The automatic lead core module is located within the telescopic sleeve, specifically between the front rod and the positioning core.

[0006] As a preferred embodiment of the present invention: the rear rod is further provided with a rubber; the front rod is provided with an ejector rod that passes through the positioning core; the rubber and the ejector rod are in contact with each other.

[0007] The rear rod is divided into a rear rod body and a rear rod rotating component; the rear rod rotating component can rotate relative to the rear rod body. The rear rod is also equipped with a rotating output module and a rubber; The rotating co-exit module includes a rotating co-exit component and a rotating moving component; the rotating co-exit component can move vertically relative to the rear rod body, but cannot rotate relative to the rear rod body; the rotating moving component and the rotating co-exit component are threaded together; When the rear rod rotating component rotates, it will drive the rotating moving component to rotate. When the rotating moving component is driven to rotate, but the rear rod body does not rotate, the rotating output component also does not rotate. The rotating moving component will rotate relative to the rotating output component. Due to the influence of the threaded fit, the rotating moving component and the rotating output component will be displaced relative to each other. The rubber and the rotating moving part are engaged with each other.

[0008] As a preferred embodiment of the present invention, the positioning core is further provided with a core-loading hole; the inner diameter of the core-loading hole is smaller than the inner diameter of the automatic lead core module, which enables better core replacement.

[0009] As a preferred embodiment of the present invention, the automatic lead core module is also provided with a reset spring, which can automatically reset after the core is pulled out.

[0010] As a preferred embodiment of the present invention: the bottom of the rubber is further provided with a rubber base; when the rubber base is provided, the rubber base replaces the rubber and contacts the ejector rod or engages with the rotating moving part; when the positioning core is provided with a core-loading hole, the rubber base may or may not be provided with a core-loading hole; when a core is required, the rubber base can be pulled out together.

[0011] As a preferred embodiment of the present invention: the positioning core is further provided with a limiting boss; the rotating output component is further provided with an output limiting boss, in order to improve the user experience and increase the resistance to the rubber retraction during use.

[0012] As a preferred embodiment of the present invention, the positioning core and the rotating moving part are further provided with core mounting holes in order to better install the lead core, increase efficiency, and extend service life.

[0013] As a preferred embodiment of the present invention, the bottom of the rotating part is provided with a top-out portion.

[0014] As a preferred embodiment of the present invention, a resetting component is further provided between the rotating co-exit component and the rear rod rotating component.

[0015] As a preferred embodiment of the present invention, the front rod is further provided with a gripping software sleeve to improve the user experience and reduce user fatigue.

[0016] As a preferred embodiment of the present invention, the rear rod is further provided with a rubber clamping part, which facilitates the clamping of the rubber and increases the feel of use.

[0017] Compared with existing technologies, the above technical solution has the following beneficial effects: First, the core-pulling operation is simpler, more efficient, more user-friendly, and saves more time.

[0018] Second, while ensuring basic operation, the structure is simple and easy to mass-produce.

[0019] III. Multiple Rotation Adjustments: The length of the rubber band extension can be adjusted by rotation to accommodate various usage habits; for example: 1. It can directly rotate to extend or retract the rubber band; 2. It can be used in conjunction with the pull-out rubber band, because the rubber band is a consumable item. When the rubber band is worn out, the length of the rubber band exposed when pulling out the rubber band can be adjusted by rotating the rubber band; 3. It can also be used to directly control the length of the rubber band exposed when pulling out the rubber band according to different users' usage habits.

[0020] IV. Eraser Released Simultaneously with Lead Removal: When the lead is pulled out, the eraser is also pulled out, reducing unnecessary operations. One operation achieves multiple functions, ensuring that when the consumer uses the product, the eraser will be exposed at the same time as the lead is pulled out, making it convenient for the consumer to use directly.

[0021] Fifth, it is comfortable to use and does not cause fatigue even after prolonged use.

[0022] 6. When the eraser is used upside down, it has a temporary locking structure inside. As long as it is not pushed in forcefully in a vertical direction, it can further ensure that the eraser will not be retracted during normal wiping, thus better ensuring normal use.

[0023] 7. In addition to rotating to retract the eraser as described above, you can also retract it by pushing it in vertically with force, which is efficient and quick. Attached Figure Description

[0024] Figure 1 This is an exploded view of Embodiment 1 of the present invention.

[0025] Figure 2 This is the front view of Embodiment 1 of the present invention.

[0026] Figure 3 This is a left sectional view of Embodiment 1 of the present invention.

[0027] Figure 4 This is an exploded view of Embodiment 2 of the present invention.

[0028] Figure 5 This is the front view of Embodiment 2 of the present invention.

[0029] Figure 6 This is a left sectional view of Embodiment 2 of the present invention.

[0030] Figure 7 This is an exploded view of Embodiment 3 of the present invention.

[0031] Figure 8 This is the front view of Embodiment 3 of the present invention.

[0032] Figure 9 This is a left sectional view of Embodiment 3 of the present invention.

[0033] Figure 10 This is an exploded view of Embodiment 4 of the present invention.

[0034] Figure 11 This is the front view of Embodiment 4 of the present invention.

[0035] Figure 12 This is a left sectional view of Embodiment 4 of the present invention.

[0036] Figure 13 This is an exploded view of Embodiment 5 of the present invention.

[0037] Figure 14 This is the front view of Embodiment 5 of the present invention.

[0038] Figure 15 This is a left sectional view of Embodiment 5 of the present invention.

[0039] Figure label: 1. Front stick. 11. Top stick.

[0040] 2. Rear rod. 21. Positioning core. 211. Limiting boss. 212. Core mounting hole. 22. Rear rod body. 23. Rear rod rotating component. 24. Rubber clamping part.

[0041] 3. Automatic lead core module.

[0042] 4. Rotary co-exit component. 41. Co-exit limiting boss.

[0043] 5. Eraser. 51. Eraser base.

[0044] 6. Rotating moving parts. 61. Ejector section.

[0045] 8. Return spring.

[0046] 9. Same as the reset component. Detailed Implementation

[0047] The present invention will now be further described with reference to the accompanying drawings. Example 1

[0048] like Figures 1 to 3 The illustrated pull-out mechanical pencil includes an automatic lead module 3 and a telescopic sleeve.

[0049] The aforementioned telescopic assembly includes a front rod 1 and a rear rod 2 that are telescopically connected to each other. The rear rod 2 is provided with a positioning core 21.

[0050] The aforementioned automatic lead core module 3 is located within the telescopic sleeve, specifically between the front rod 1 and the positioning core 21.

[0051] The aforementioned front rod 1 is provided with an ejector rod 11 that passes through the positioning core 21. The aforementioned rubber 5 and the ejector rod 11 are in contact with each other.

[0052] The aforementioned rear rod 2 is divided into a rear rod body 22 and a rear rod rotating component 23. The aforementioned rear rod rotating component 23 can rotate relative to the rear rod body 22.

[0053] The rear rod 2 is also equipped with a rotating output module and a rubber 5.

[0054] The aforementioned rotating output module includes a rotating output component 4 and a rotating moving component 6. The rotating output component 4 can move vertically relative to the rear rod body 22, but cannot rotate relative to the rear rod body 22. The rotating moving component 6 and the rotating output component 4 are threaded together.

[0055] When the rear rod rotating component 23 rotates, it will drive the rotating moving component 6 to rotate. When the rotating moving component 6 is driven to rotate, but the rear rod body 22 does not rotate, the rotating connecting component 4 also does not rotate. Then the rotating moving component 6 will rotate relative to the rotating connecting component 4. Due to the influence of the threaded fit, the rotating moving component 6 and the rotating connecting component 4 will undergo mutual displacement.

[0056] In order to automatically reset after the core is pulled out, the automatic lead core module 3 is also equipped with a reset spring 8.

[0057] The rubber 5 is further provided with a rubber base 51 at its bottom. When the rubber base 51 is provided, it replaces the rubber 5 in contact with the ejector rod 11 or engages with the rotating moving part 6. When the positioning core 21 is provided with a core-loading hole 212, the rubber base may or may not have a core-loading hole 212. When a core needs to be installed, the rubber base can be pulled out together with the core.

[0058] To improve the user experience and increase the resistance during rubber retraction, the positioning core 21 is also provided with a limiting boss 211. The rotating co-exit component 4 is also provided with a co-exit limiting boss 41.

[0059] In order to better install the lead core, increase efficiency and extend service life, the positioning core 21 and the rotating moving part 6 are also provided with core loading holes 212.

[0060] To improve the user experience and reduce fatigue, the aforementioned front lever 1 is also equipped with a gripping software sleeve 10.

[0061] The usage method is as follows: 1. Rubber length adjustment: Rotate the rear rod rotating part 23, which drives the rotating moving part 6 to rotate. Due to the non-rotation of the rotating part 4 and the effect of the threaded engagement between the rotating moving part 6 and the rotating part 4, the rotating moving part 6 drives the engaged rubber base 51 to push the rubber 5 towards the rubber 5, thus adjusting the extension length of the rubber 5.

[0062] 2. Pen lead and eraser emerge simultaneously: The front rod 1 moves to the rear rod 2, which drives the rotating module to move together via the ejector rod 11, and then drives the eraser base 51 and eraser 5 to move, so that the eraser emerges at the same time as the pen lead. Example 2

[0063] like Figures 4 to 6 The illustrated pull-out mechanical pencil includes an automatic lead module 3 and a telescopic sleeve.

[0064] The aforementioned telescopic assembly includes a front rod 1 and a rear rod 2 that are telescopically connected to each other. The rear rod 2 is provided with a positioning core 21.

[0065] The aforementioned automatic lead core module 3 is located within the telescopic sleeve, specifically between the front rod 1 and the positioning core 21.

[0066] The aforementioned rear rod 2 is divided into a rear rod body 22 and a rear rod rotating component 23. The aforementioned rear rod rotating component 23 can rotate relative to the rear rod body 22.

[0067] The rear rod 2 is also equipped with a rotating output module and a rubber 5.

[0068] The aforementioned rotating output module includes a rotating output component 4 and a rotating moving component 6. The rotating moving component 6 can move vertically relative to the rear rod body 22, but cannot rotate relative to the rear rod body 22. The rotating moving component 6 and the rotating output component 4 are threaded together.

[0069] When the rear rod rotating component 23 rotates, it will drive the rotating connecting component 4 to rotate. When the rotating connecting component 4 is driven to rotate, but the rear rod body 22 does not rotate, the rotating moving component 6 also does not rotate. The rotating connecting component 4 will rotate relative to the rotating moving component 6. Due to the influence of the threaded fit, the rotating moving component 6 and the rotating connecting component 4 will undergo mutual displacement.

[0070] To facilitate better lead replacement, the positioning core 21 is also provided with a lead loading hole 212. The inner diameter of the lead loading hole 212 is smaller than the inner diameter of the automatic lead core module 3.

[0071] In order to automatically reset after the core is pulled out, the automatic lead core module 3 is also equipped with a reset spring 8.

[0072] To optimize the structure, the bottom of the rotating part 4 is provided with a top part 61.

[0073] A resetting component 9 is also provided between the aforementioned rotating component 4 and the rear rod rotating component 23.

[0074] The usage method is as follows: 1. Rubber length adjustment: Rotate the rear rod rotating part 23, which drives the rotating part 4 to rotate. Due to the non-rotation of the rotating moving part 4 and the effect of the threaded engagement between the rotating moving part 6 and the rotating part 4, the rotating part 4 pushes the rubber 5 towards the rubber 5, thus adjusting the length of the rubber 5 extended for use.

[0075] 2. Pen lead and eraser emerge simultaneously: The front lever 1 moves to the rear lever 2, which drives the rotating simultaneous ejection module to move together through the ejector part 61, and then drives the eraser 5 to move, so that the eraser emerges at the same time as the pen lead.

[0076] 3. Automatic reset of the rotating co-exit module: After the core is ejected, the front rod automatically resets. The rotating co-exit module is moved towards the rear rod body 22 by the elastic force of the co-exit reset component 9 to achieve the reset purpose. Example 3

[0077] like Figures 7 to 9 The illustrated pull-out mechanical pencil includes an automatic lead module 3 and a telescopic sleeve.

[0078] The aforementioned telescopic assembly includes a front rod 1 and a rear rod 2 that are telescopically connected to each other. The rear rod 2 is provided with a positioning core 21.

[0079] The aforementioned automatic lead core module 3 is located within the telescopic sleeve, specifically between the front rod 1 and the positioning core 21.

[0080] The aforementioned rear rod 2 is divided into a rear rod body 22 and a rear rod rotating component 23. The aforementioned rear rod rotating component 23 can rotate relative to the rear rod body 22.

[0081] The rear rod 2 is also equipped with a rotating output module and a rubber 5.

[0082] The aforementioned rotating output module includes a rotating output component 4 and a rotating moving component 6. The rotating output component 4 can move vertically relative to the rear rod body 22, but cannot rotate relative to the rear rod body 22. The rotating moving component 6 and the rotating output component 4 are threaded together.

[0083] When the rear rod rotating component 23 rotates, it will drive the rotating moving component 6 to rotate. When the rotating moving component 6 is driven to rotate, but the rear rod body 22 does not rotate, the rotating connecting component 4 also does not rotate. Then the rotating moving component 6 will rotate relative to the rotating connecting component 4. Due to the influence of the threaded fit, the rotating moving component 6 and the rotating connecting component 4 will undergo mutual displacement.

[0084] The rubber 5 and the rotating moving part 6 are engaged with each other.

[0085] In order to automatically reset after the core is pulled out, the automatic lead core module 3 is also equipped with a reset spring 8.

[0086] To improve the user experience and increase the resistance during rubber retraction, the positioning core 21 is also provided with a limiting boss 211. The rotating co-exit component 4 is also provided with a co-exit limiting boss 41.

[0087] In order to better install the lead core, increase efficiency, and extend service life, the positioning core 21 and the rotating moving part 6 are also provided with core mounting holes 212.

[0088] To improve the user experience and reduce fatigue, the aforementioned front lever 1 is also equipped with a gripping software sleeve 10.

[0089] The usage method is as follows: 1. Rubber length adjustment: Rotate the rear rod rotating part 23, which drives the rotating moving part 6 to rotate. Due to the non-rotation of the rotating part 4 and the effect of the threaded engagement between the rotating moving part 6 and the rotating part 4, the rotating moving part 6 pushes the rubber 5 towards the rubber 5, adjusting the extension length of the rubber 5.

[0090] 2. Pen lead and eraser emerge simultaneously: The front rod 1 moves to the rear rod 2, which drives the rotating module to move together through the ejector rod 11, and then drives the eraser 5 to move, so that the eraser emerges at the same time as the pen lead. Example 4

[0091] like Figures 10 to 12 The image shows a pull-out mechanical pencil, which includes an automatic lead module 3 and a telescopic sleeve.

[0092] The aforementioned telescopic assembly includes a front rod 1 and a rear rod 2 that are telescopically connected to each other. The rear rod 2 is provided with a positioning core 21.

[0093] The aforementioned automatic lead core module 3 is located within the telescopic sleeve, specifically between the front rod 1 and the positioning core 21.

[0094] To facilitate better lead replacement, the positioning core 21 is also provided with a lead loading hole 212. The inner diameter of the lead loading hole 212 is smaller than the inner diameter of the automatic lead core module 3.

[0095] In order to automatically reset after the core is pulled out, the automatic lead core module 3 is also equipped with a reset spring 8.

[0096] To improve the user experience and reduce fatigue, the aforementioned front lever 1 is also equipped with a gripping software sleeve 10. Example 5

[0097] like Figures 13 to 15 The image shows a pull-out mechanical pencil, which includes an automatic lead module 3 and a telescopic sleeve.

[0098] The aforementioned telescopic assembly includes a front rod 1 and a rear rod 2 that are telescopically connected to each other. The rear rod 2 is provided with a positioning core 21.

[0099] The aforementioned automatic lead core module 3 is located within the telescopic sleeve, specifically between the front rod 1 and the positioning core 21.

[0100] To facilitate better lead replacement, the positioning core 21 is also provided with a lead loading hole 212. The inner diameter of the lead loading hole 212 is smaller than the inner diameter of the automatic lead core module 3.

[0101] In order to enable the rubber to extend synchronously when the core is ejected, a rubber abrasive (5) is also provided inside the rear rod (2); the front rod 1 is provided with an ejector rod 11 that passes through the positioning core 21. The rubber 5 and the ejector rod 11 are in contact with each other.

[0102] In order to automatically reset after the core is pulled out, the automatic lead core module 3 is also equipped with a reset spring 8.

[0103] To improve the user experience and reduce fatigue, the aforementioned front lever 1 is also equipped with a gripping software sleeve 10.

[0104] In order to make better use of the rubber, increase the clamping force when using the rubber, and reduce the rubber falling off, the rear rod (2) is also provided with a rubber clamping part (24).

[0105] Additional notes: 1. Example 4 adopts a minimalist design and has relatively low assembly and mass production costs, making it highly marketable. Alternatively, based on Example 4, a rubber pad can be added to the tail of the rear bar and installed in a snap-fit ​​manner.

[0106] 2. In the above embodiments, the front and rear rods of the telescopic sleeve can slide and extend relative to each other. However, there is a structural limit between the front and rear rods, that is, there is a maximum extension distance limit between the front and rear rods. Once the maximum extension distance is reached, the front and rear rods cannot easily detach.

[0107] 3. For example: Figures 10-12 As shown, the front rod is provided with a front rod anti-detachment protrusion, and the rear rod is provided with a rear rod anti-detachment groove. After the front rod and the rear rod are installed and matched, the front rod anti-detachment protrusion is installed in the rear rod anti-detachment groove and cannot easily detach from the limit of the rear rod anti-detachment groove. However, they can slide relative to each other.

[0108] 4. The aforementioned rear rod rotating component 23 can rotate relative to the rear rod body 22. This can be achieved through structural locking or through third-party accessories. The main technical objective is that the rear rod rotating component 23 can rotate relative to the rear rod body 22.

[0109] 5. The positioning core 21 can be integrally formed with the rear rod or placed in any position inside the rear rod as a separate accessory. Its main function is to hold the automatic lead core module 3 in place. When a component such as an eraser is added, the positioning core 21 is usually located in the middle of the rear rod. When there is no eraser, it can be located directly at the tail of the rear rod.

[0110] 6. The rubber clamping part 24 has a certain elasticity. It can compress the space inside the rear rod through external force, thereby clamping the rubber and preventing it from retracting when used. The rubber clamping part 24 can be made of elastic material or soft material, or it can directly adopt an elastic structure to achieve its elastic effect. Its main function is that when in use, the elasticity of the rubber clamping part 24 allows the rear rod or rear rod rotating part and the rubber to be temporarily regarded as a whole, thereby ensuring stability during wiping.

[0111] 7. The ejector rod 11 and the ejector part 61 have the same purpose, which is to transmit the force of the front rod to the eraser to ensure that the eraser can be ejected. The ejector part 61 can further transmit the force directly without going through the front rod. Instead, the force of the front rod will move the automatic lead core module, and the force will be transmitted to the eraser through the automatic lead core module. If there is an eraser base, the force will be transmitted to the eraser base first, and then the eraser base will transmit the force to the eraser. And so on.

[0112] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0113] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0114] The above are preferred embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the principle of the present invention, and these should also be considered within the scope of protection of the present invention.

[0115] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0116] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A pull-out mechanical pencil, characterized in that: Includes automatic lead core module (3) and telescopic sleeve; The telescopic assembly includes a front rod (1) and a rear rod (2) that are telescopically connected to each other; the rear rod (2) is provided with a positioning core (21). The automatic lead core module (3) is located inside the telescopic sleeve, specifically between the front rod (1) and the positioning core (21); The rear rod (2) is divided into a rear rod body (22) and a rear rod rotating component (23); the rear rod rotating component (23) can rotate relative to the rear rod body (22); The rear rod (2) is also provided with a rotating output module, which includes a rotating output component (4) and a rotating moving component (6), and the rotating moving component (6) and the rotating output component (4) are threaded together.

2. A pull-out mechanical pencil according to claim 1, characterized in that: The rear rod (2) is also provided with a rubber rubber (5); the front rod (1) is provided with a push rod (11) that passes through the positioning core (21).

3. A pull-out mechanical pencil according to claim 1, characterized in that: The rotating part (4) can move up and down relative to the rear rod body (22), but cannot rotate relative to the rear rod body (22); When the rear rod rotating component (23) rotates, it will drive the rotating moving component (6) to rotate.

4. A pull-out mechanical pencil according to any one of claims 1 to 3, characterized in that: The positioning core (21) is also provided with a core loading hole (212).

5. A pull-out mechanical pencil according to any one of claims 1 to 3, characterized in that: The automatic lead core module (3) is also equipped with a reset spring (8).

6. A pull-out mechanical pencil according to any one of claims 2 to 3, characterized in that: The bottom of the rubber pad (5) is also provided with a rubber base (51).

7. A pull-out mechanical pencil according to claim 3, characterized in that: The positioning core (21) is also provided with a limiting boss (211); the rotating co-exit component (4) is also provided with a co-exit limiting boss (41).

8. A pull-out mechanical pencil according to claim 1, characterized in that: The rear rod (2) is also provided with a rubber clamping part (24).

9. A pull-out mechanical pencil according to claim 3, characterized in that: The rotating moving part (6) has an ejector part (61) at its bottom.

10. A pull-out mechanical pencil according to any one of claims 3, 7, 8 and 9, characterized in that: A resetting component (9) is also provided between the rotating co-exit component (4) and the rear rod rotating component (23).

11. A pull-out mechanical pencil according to claim 1, characterized in that: The rear rod (2) is also equipped with a rubber rubber (5).

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