Propelling pencil
By adopting a combined structure of compression springs and clip fasteners in the pencil, the automatic sliding out and length of the pencil core are achieved, which solves the problems of easy breakage of the pencil core and uncontrollable lead output in the prior art, and improves writing Convenience and reusability of pencils.
Patent Information
- Application Number
- CN202420554741.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-21
AI Technical Summary
The existing automatic pencil is prone to break when writing, and the lead output is uncontrollable, so it is impossible to achieve a completely automatic lead output and controllable effect.
The structure adopts a structure including a pen rod, a core guard tube, a fastening sleeve, a connecting pipe, a pen tip sleeve, a second spring, a sandwicher and a core outlet tube. Through the compression of the first spring and the second spring, the clamp fastener is arc-shaped. The slot is opened and closed to realize the automatic slide out of the pencil core and the controllable length.
The pencil core automatically produces lead during writing and the amount of lead is controllable, avoiding the pencil core breakage, improving the convenience of writing and the reusability of the pencil.
Smart Images
Figure CN222179080U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of stationery, and more specifically to a mechanical pencil. Background Art
[0002] Most conventional pencils require pressing the top of the pencil to extend the lead. Since the amount of lead output is uncontrollable, the pencil lead is easily broken when writing, so a pencil with automatic lead output has been developed.
[0003] The working principle of automatic lead-discharging pencils is generally a pulsating movement structure, which is the basic structure commonly used by mechanical pencils. It is mainly composed of a pen holder, a tip sleeve (core-discharging tube), a fixed core-protecting tube (movable damping), a chuck (flowering), a locking hoop, a spring, etc. When the core storage tube is subjected to the pressing pressure (finger pressure), it overcomes the elastic force of the spring and moves downward, and the claws of the chuck are opened. At the same time, the lead core leaves its original position in the core storage tube by its own gravity and moves a certain length along the wall of the core-protecting tube under the control of the damping ring of the brake element. After the pressing pressure is released, the spring returns to its original position, and the lead core is automatically locked and positioned by the locking hoop and the chuck, completing a pulsating core-discharging process. This reciprocating process can continuously pulsate the core. The lead of a mechanical pencil with a pulsating movement structure is achieved by pressing the core storage tube with fingers, and it cannot achieve fully automatic lead discharging.
[0004] Therefore, how to provide a mechanical pencil, in which during the writing process, the lead can be extended out of the lead tube by contacting and pressing the lead tube with the writing paper, so as to achieve the purpose of automatic lead discharge and controllable lead discharge amount, and make the pencil lead not easy to break, is a technical problem that needs to be solved urgently by those skilled in the art. Utility Model Content
[0005] In view of this, the utility model provides a mechanical pencil, aiming to solve the above technical problems.
[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:
[0007] A mechanical pencil, comprising:
[0008] A pen holder, a core protection tube, a fastening sleeve, a connecting tube, a pen tip sleeve, a second spring, a core clamp, a first spring and a core outlet tube;
[0009] The pen holder has a lead outlet end and a cap end, and both ends are connected; the core protection tube, the fastening sleeve, and the connecting tube are coaxially arranged in the pen holder from the cap end to the lead outlet end and plugged into each other; the large end of the nib sleeve is fixed to one end of the connecting tube corresponding to the lead outlet end;
[0010] The second spring and the core holder are arranged in sequence in the connecting tube from the cap end to the lead outlet end and abut against each other;
[0011] The first spring and the core outlet tube are arranged in sequence in the nib cover from the cap end to the lead outlet end and abut against each other. The end of the first spring corresponding to the cap end abuts against the core clamp; the end of the core outlet tube corresponding to the lead outlet end can be slid out of the small head end of the nib cover.
[0012] The beneficial effect of the above technical solution is that the pencil lead passes through the core protection tube, the fastening sleeve, the second spring, the core clamp, the first spring and the core outlet tube in sequence, and the core protection tube can ensure that the pencil lead will not break in the pen holder due to its length and brittleness; when the core outlet tube presses the writing paper, the first spring is compressed, and the core clamp is released from the clamping state under the action of the first spring, and the pencil lead overcomes the elastic force of the spring and moves out of the core outlet tube, at which time normal writing can be carried out, and the length of the pencil lead extending out of the core outlet tube is controllable, which can achieve the effect of automatic lead output.
[0013] Preferably, a convex edge is fixed to the outer wall of the core outlet tube, the convex edge is slidably connected to the inner wall of the small end of the nib cover, and the outer diameter of the convex edge is larger than the inner diameter of the small end of the nib cover. Under the action of the convex edge, the core outlet tube can slide along the inner wall of the small end of the nib cover, and on the other hand, the convex edge can clamp the core outlet tube in the small end of the nib cover to prevent the core outlet tube from completely sliding out of the nib cover.
[0014] Preferably, one end of the first spring is sleeved on the end of the core outlet tube away from the small end of the nib cover, and its end face abuts against the radial wall of the convex edge. The first spring is sleeved on the core outlet tube and abuts against the end face of the convex edge. When the core outlet tube is pressed, the core outlet tube slides along the nib cover toward the large end, compressing the first spring.
[0015] Preferably, the core clamp comprises a sleeve, a clamping member, a limiting ring, a third spring and an end cover;
[0016] A supporting ring is fixed on the inner wall of one end of the sleeve;
[0017] The clip piece is composed of two clip pieces with arc grooves that are buckled together to form a tubular structure to clamp the pencil lead. The limiting ring is a semicircular ring. The two limiting rings are fixed on the opposite outer walls of the two clip pieces in a one-to-one correspondence. The clip piece is concentrically arranged in the inner cavity of the sleeve, and one end of the clip piece passes through the annular cavity of the holding ring.
[0018] The third spring is sleeved on the outer wall of the clip, one end of the third spring abuts against the radial wall surface of the limiting ring, and the other end abuts against the annular surface of the supporting ring;
[0019] The end cap is provided with a small hole for the pencil lead to pass through, and the end cap is buckled on an end of the sleeve away from the supporting ring.
[0020] The beneficial effect of the above technical solution is that the core clamp is fastened by two clips, and the clips are clamped by the third spring. Under normal conditions, the two clips clamp the pencil lead. When the third spring is compressed, one end of the two clips opens, and the pencil lead can slide along the core clamp.
[0021] Preferably, the end of the first spring away from the core outlet tube abuts against the end surface of the clip close to the holding ring, and the end of the second spring away from the fastening sleeve abuts against the outer wall of the end cover. The first spring and the second spring are compressed, and the elastic force of the first spring acts on the clip. The clip will compress the third spring during the sliding process in the sleeve. The compression of the third spring will open one end of the clip, and after opening, it will contact the clamping effect of the core clamp, and the pencil lead can slide.
[0022] Preferably, a plurality of convex pins are evenly fixed on the outer wall of the fastening sleeve, and an L-shaped limiting groove cooperating with the convex pin is provided on the outer wall of the connecting tube away from the nib sleeve. The convex pin slides into the vertical groove of the limiting groove, and after the fastening sleeve is rotated, the convex pin abuts against the groove wall of the horizontal groove of the limiting groove, at which time, the fastening sleeve fastens the core tube, the first spring, the core clamp, and the second spring in the nib sleeve.
[0023] Preferably, a sealing plate is fixed to the inner wall of the fastening sleeve, one end of the second spring away from the core clamp is inserted into the inner cavity of one end of the fastening sleeve and abuts against one plate surface of the sealing plate, and one end of the core protection tube is inserted into the inner cavity of the other end of the fastening sleeve and abuts against the other plate surface of the sealing plate. The second spring is inserted into the fastening sleeve to improve the verticality of the second spring in the pen tip sleeve, and the second spring abuts against the sealing plate in the fastening sleeve to ensure the compression effect of the second spring.
[0024] Preferably, the invention further comprises a pen cap and an eraser, wherein a ring column is fixed to the pen cap end, one end of the pen cap is buckled on the ring column, and the eraser is plugged into the other end of the pen cap. The eraser can be used to easily erase writing errors.
[0025] Preferably, the outer wall of the pen cap is provided with threads, and a hanging ring is fixed on the outer wall of the middle part of the pen cap. The hanging ring is convenient for storing pencils.
[0026] It can be known from the above technical scheme that, compared with the prior art, the utility model discloses a mechanical pencil, which can press the lead tube to compress the first spring and the second spring, and the first spring abuts against the clamping piece in the core clamp. Under the elastic action, the third spring compresses and opens the arc groove on the clamping piece, so that the pencil lead can move and slide out of the lead tube for a short distance, so as to achieve the purpose of automatic lead output and the lead output amount can be controlled. After the pencil lead is used up, the pen cap can be opened to fill a new pencil lead for reuse. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.
[0028] Figure 1 A schematic diagram of the pencil structure provided by the utility model;
[0029] Figure 2 A sectional view of a pencil provided by the utility model;
[0030] Figure 3 The utility model provides a schematic diagram of the pencil explosion.
[0031] in,
[0032] 1-penholder; 2-pen tip cover; 3-core tube; 31-convex edge; 4-first spring; 5-core clamp; 51-end cover; 52-sleeve; 53-clip; 54-third spring; 55-holding ring; 56-limiting ring; 7-fastening sleeve; 71-convex pin; 8-core tube; 9-pencil lead; 10-pen cap; 11-rubber; 12-connecting tube; 121-limiting groove DETAILED DESCRIPTION
[0033] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.
[0034] See attached Figures 1 to 3 The utility model discloses an automatic pencil. When the length of the pencil lead is consumed during writing, the lead tube presses the paper to achieve the effect of automatically releasing the lead, making writing more convenient, including:
[0035] Pen body 1, core protection tube 8, fastening sleeve 7, connecting tube 12, pen tip sleeve 2, second spring 6, core clamp 5, first spring 4 and core outlet tube 3;
[0036] The pen holder 1 has a lead outlet end and a cap end, and both ends are connected; the core protection tube 8, the fastening sleeve 7, and the connecting tube 12 are coaxially arranged in the pen holder 1 from the cap end to the lead outlet end and plugged into each other; the large end of the nib sleeve 2 is fixed to one end of the connecting tube 12 corresponding to the lead outlet end;
[0037] The second spring 6 and the core clamp 5 are sequentially arranged in the connecting tube 12 from the cap end to the lead outlet end and abut against each other;
[0038] The first spring 4 and the core outlet tube 3 are arranged in sequence from the cap end to the lead outlet end in the nib cover 2 and abut against each other. The end of the first spring 4 corresponding to the cap end abuts against the clamp 5; the end of the core outlet tube 3 corresponding to the lead outlet end can slide out of the small head end of the nib cover 2.
[0039] In order to further optimize the above technical solution and ensure that the core outlet tube will not slip out through the opening of the small end of the pen tip cover in the pen tip cover, a convex edge 31 is fixed on the outer wall of the core outlet tube 3, and the convex edge 31 is slidably connected to the inner wall of the small end of the pen tip cover 2. The outer diameter of the convex edge 31 is larger than the inner diameter of the small end of the pen tip cover 2.
[0040] In order to further optimize the above technical solution and ensure that the core outlet tube can compress the first spring when it contacts the paper, one end of the first spring 4 is sleeved on the end of the core outlet tube 3 away from the small end of the pen tip cover 2, and its end face abuts against the radial wall surface of the convex edge 31.
[0041] In this embodiment, the core clamp 5 includes a sleeve 52, a clamping member 53, a limiting ring 56, a third spring 54 and an end cover 51;
[0042] A supporting ring 55 is fixed on the inner wall of one end of the sleeve 52;
[0043] The clamping member 53 is composed of two clamping pieces with arc grooves, which are buckled together to form a tubular structure to clamp the pencil lead 9. The limiting ring 56 is semicircular, and the two limiting rings 56 are fixed on the opposite outer walls of the two clamping pieces respectively. The clamping member 53 is concentrically arranged in the inner cavity of the sleeve 52, and one end thereof passes through the annular cavity of the supporting ring 55.
[0044] The third spring 54 is sleeved on the outer wall of the clamping member 53, one end of which abuts against the radial wall surface of the limiting ring 56, and the other end abuts against the annular surface of the abutting ring 55;
[0045] The end cap 51 is provided with a small hole for the pencil lead 9 to pass through, and the end cap 51 is buckled on the end of the sleeve 52 away from the abutting ring.
[0046] In order to further optimize the above technical solution, one end of the first spring 4 away from the core outlet tube 3 abuts against the end surface of the clamp 53 passing through the abutting ring, and one end of the second spring 6 away from the fastening sleeve 7 abuts against the outer wall of the end cover 51.
[0047] The clip controls the opening and closing of the arc groove through the third spring controller, the first spring and the second spring clamp the core holder, the first spring abuts against one end of the clip, after the first spring and the second spring are compressed, their elastic force compresses the third spring, the arc groove of the clip opens, the pencil lead slides along the arc groove after overcoming the elastic force, and finally a small section of the core tube leaks out, thereby realizing automatic lead output and being able to control the lead output length.
[0048] In order to further optimize the above technical solution, a plurality of convex pins 71 are evenly fixed on the outer wall of the fastening sleeve 7, and an L-shaped limiting groove 121 matching with the convex pin 71 is provided on the outer wall of the connecting tube 12 away from the nib sleeve 2. The convex pin is inserted into the vertical groove of the limiting groove, and the convex pin is abutted against the horizontal groove wall of the limiting groove after the fastening sleeve is rotated, and the fastening sleeve and the nib sleeve are connected, and the fastening sleeve can be rotated in reverse order to release the connection.
[0049] In order to further optimize the above technical solution, a sealing plate is fixed to the inner wall of the fastening sleeve 7, one end of the second spring 6 away from the core clamp 5 is inserted into the inner cavity of one end of the fastening sleeve 7 and abuts against one plate surface of the sealing plate, and one end of the core protection tube 8 is inserted into the inner cavity of the other end of the fastening sleeve 7 and abuts against the other plate surface of the sealing plate. The sealing plate is used as a supporting plate for the second spring, and after the first spring is compressed, the core clamp is driven to slide to ensure that the second spring can be compressed.
[0050] In some other specific embodiments, the second spring is always in a compressed state in the pen tip cover, and the position of the clamp in the pen tip cover is fixed by elastic force. When the first spring is compressed, the clip slides slightly in the sleeve. During the sliding process of the clip in the sleeve, the third spring is compressed, thereby realizing the opening of the arc groove of the clip.
[0051] In some other specific embodiments, the pen tip cover and the connecting tube are integrally formed, and the connecting tube is plugged or threadedly connected to the pen body.
[0052] In order to further optimize the above technical solution, a pen cap 10 and an eraser 11 are also included. A ring column is fixed to the cap end of the pen body 1. One end of the pen cap 10 is buckled on the ring column, and the eraser 11 is inserted into the other end of the pen cap 10.
[0053] In order to further optimize the above technical solution and facilitate the storage of pencils, the outer wall of the pen cap 10 is provided with threads, and a hanging ring is fixed to the outer wall in the middle of the pen cap 10.
[0054] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.
[0055] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A mechanical pencil, characterized in that: include: A pen holder (1), a core protection tube (8), a fastening sleeve (7), a connecting tube (12), a pen tip sleeve (2), a second spring (6), a core clamp (5), a first spring (4) and a core outlet tube (3); The pen holder (1) has a lead outlet end and a cap end, and both ends are connected; the core protection tube (8), the fastening sleeve (7), and the connecting tube (12) are coaxially arranged in the pen holder (1) along the cap end to the lead outlet end and are plugged into each other; the large end of the nib sleeve (2) is fixed to one end of the connecting tube (12) corresponding to the lead outlet end; The second spring (6) and the core clamp (5) are sequentially arranged in the connecting tube (12) from the cap end to the lead outlet end and abut against each other; The first spring (4) and the core outlet tube (3) are sequentially arranged in the nib cover (2) from the cap end to the lead outlet end and abut against each other. The end of the first spring (4) corresponding to the cap end abuts against the core clamp (5); the end of the core outlet tube (3) corresponding to the lead outlet end can slide out of the small end of the nib cover (2).
2. A mechanical pencil according to claim 1, characterized in that: A convex edge (31) is fixed on the outer wall of the core outlet tube (3), and the convex edge (31) is slidably connected to the inner wall of the small end of the nib cover (2), and the outer diameter of the convex edge (31) is larger than the inner diameter of the small end of the nib cover (2).
3. A mechanical pencil according to claim 2, characterized in that: One end of the first spring (4) is sleeved on an end of the core outlet tube (3) away from the small end of the pen tip cover (2), and its end surface abuts against the radial wall surface of the convex edge (31).
4. A mechanical pencil according to claim 3, characterized in that: The core clamp (5) comprises a sleeve (52), a clamping member (53), a limiting ring (56), a third spring (54) and an end cover (51); A supporting ring (55) is fixed on the inner wall of one end of the sleeve (52); The clamping member (53) is composed of two clamping pieces with arc grooves, which are buckled together to form a tubular structure to clamp the pencil lead (9); the limiting ring (56) is semicircular, and the two limiting rings (56) are fixed on the opposite outer walls of the two clamping pieces in a one-to-one correspondence; the clamping member (53) is coaxially arranged in the inner cavity of the sleeve (52), and one end thereof passes through the annular cavity of the supporting ring (55); The third spring (54) is sleeved on the outer wall of the clamp (53), one end of which abuts against the radial wall surface of the limiting ring (56), and the other end abuts against the annular surface of the supporting ring (55); The end cover (51) is provided with a small hole for the pencil lead (9) to pass through, and the end cover (51) is buckled on the end of the sleeve (52) away from the supporting ring.
5. A mechanical pencil according to claim 4, characterized in that: One end of the first spring (4) away from the core outlet tube (3) abuts against the end surface of the clamp (53) passing through the supporting ring, and one end of the second spring (6) away from the fastening sleeve (7) abuts against the outer wall of the end cover (51).
6. A mechanical pencil according to claim 1, characterized in that: A plurality of convex pins (71) are evenly fixed on the outer wall of the fastening sleeve (7), and an L-shaped limiting groove (121) matching with the convex pins (71) is provided on the outer wall of the end of the connecting tube (12) away from the pen tip sleeve (2).
7. A mechanical pencil according to claim 1, characterized in that: A sealing plate is fixed to the inner wall of the fastening sleeve (7); one end of the second spring (6) away from the clamp (5) is inserted into the inner cavity of one end of the fastening sleeve (7) and abuts against one surface of the sealing plate; one end of the core protection tube (8) is inserted into the inner cavity of the other end of the fastening sleeve (7) and abuts against the other surface of the sealing plate.
8. A mechanical pencil according to any one of claims 1 to 7, characterized in that: It also comprises a pen cap (10) and an eraser (11); a ring column is fixed to the cap end of the pen body (1); one end of the pen cap (10) is buckled on the ring column; and the eraser (11) is plugged into the other end of the pen cap (10).
9. A mechanical pencil according to claim 8, characterized in that: The outer wall of the pen cap (10) is provided with threads, and a hanging ring is fixed to the outer wall in the middle of the pen cap (10).