Automatic compensation pencil capable of preventing pencil core from being broken

Abstract

The utility model discloses an automatic compensation pencil capable of preventing lead breakage, which comprises a pencil holder, a pencil point is arranged at the end of the pencil holder, and a pencil point is arranged in the pencil point. A propelling assembly is installed in the pen holder, a first step and a limiting part are arranged, a first spring is arranged between the propelling assembly and the first step, a sleeve is arranged between the first step and the limiting part, and the two ends of the sleeve can abut against the limiting part and the first spring respectively. A resettable core clamping assembly is installed in the sleeve, the end of the propelling assembly extends into the sleeve and drives the sleeve to move under the action of friction force, and the end of the propelling assembly can overcome the friction force and move relative to the sleeve to abut against the core clamping assembly. The sleeve and the core clamping assembly can synchronously retract to compress the first spring, and the lead core can synchronously retract to counteract the relative acting force, so that the lead core is not prone to being broken.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automatic pencil, specifically is a kind of anti-core automatic compensation pencil. BACKGROUND

[0002] Automatic pencil gradually replaces traditional wooden pencil, and it is also in line with the requirement of low carbon environmental protection to reduce the use of wooden pencil, although automatic pencil has been developed for many years, writing and anti-breaking have greatly improved, but the lead core used is relatively thin, and it is easy to break, which has been a big problem for the development of automatic pencil, and the incorrect holding posture and incorrect pen use during writing also make the lead core easy to break. UTILITY MODEL CONTENTS

[0003] The utility model is to provide a kind of anti-core automatic compensation pencil to solve the problems presented in the above background technology.

[0004] To achieve the above object, the utility model provides the following technical scheme:

[0005] A kind of anti-core automatic compensation pencil, including pen barrel, the pen barrel end is equipped with pen head, the pen head is equipped with nib;

[0006] Pushing assembly is installed in pen barrel interior, and first step and limiting portion are equipped, first spring is equipped between pushing assembly and first step, sleeve pipe is equipped between first step and limiting portion, and the sleeve pipe two ends can be respectively with limiting portion and first spring abut;

[0007] Resettable lead clamping assembly is installed in sleeve pipe, the end of pushing assembly extends into sleeve pipe, and sleeve pipe moves under the action of friction force, and the end of pushing assembly can overcome friction force and move relative to sleeve pipe and abut with lead clamping assembly.

[0008] Further technical scheme, first step is equipped with movable ring, first spring and movable ring abut.

[0009] Further technical scheme, the lead clamping assembly includes a pair of locking pieces arranged in the sleeve pipe, and the locking pieces are opposite to each other, each locking piece is provided with a first boss and a spherical recess on the outer edge, and the opposite surfaces are provided with a clamping groove arranged in the axial direction for locking the lead core;

[0010] A first shoulder is arranged on the inner wall of the sleeve pipe, and a tapered surface is arranged on the inner wall in front of the first shoulder;

[0011] A pair of balls are arranged between the spherical recess and the tapered surface in a corresponding manner.

[0012] A second spring is arranged between the first boss and the first shoulder.

[0013] Further technical solutions, the advancing assembly includes a storage core pipe, the front end of the storage core pipe is provided with a head, the head extends into the sleeve, and protrusions are arranged on both sides of the head and abut against the inner wall of the sleeve;

[0014] The first spring is arranged between the first step and the end of the storage core pipe, the other end of the storage core pipe is provided with a second shoulder, and the second shoulder can abut against a third step on the inner wall of the pen barrel.

[0015] Further technical solutions, the pen nib is movably arranged in the pen head, a damping block is arranged behind the pen nib, and one end of the damping block extends into the pen nib in an interference fit;

[0016] A fixing block is arranged behind the damping block, a passage is arranged in the damping block and used for the lead core to pass through, a second boss is arranged on the outer periphery of the damping block, and a third spring is arranged between the second boss and the fixing block.

[0017] The beneficial effects of the utility model are as follows:

[0018] The sleeve and the core clamping assembly are movably arranged, when the force borne by the lead core is greater than the elastic force of the first spring, the sleeve and the core clamping assembly will be retracted synchronously to compress the first spring, and the lead core will also be retracted synchronously to cancel the relative force, so that the lead core is not easy to break; after the lead core leaves the paper surface, the force applied to the lead core disappears, the sleeve is reset under the action of the first spring, and the core clamping assembly is driven to move downwards, so that the lead core is moved downwards synchronously, and the lead core is retracted from the pen head to be used for writing by a user.

[0019] In addition, the lead core slightly protrudes from the pen nib, the lead core and the end of the pen nib contact the paper surface at the same time in the writing process, however, the lead core is continuously abraded in the writing process, and the pen nib is continuously retracted to compress the third spring, after the lead core and the end of the pen nib leave the paper surface, the third spring is reset to drive the damping block and the pen nib to move forward and protrude, since the damping block and the lead core have friction, the lead core is moved forward synchronously when the damping block is moved forward, and the action of automatic feeding of the lead core is realized.

[0020] Other features and advantages of the utility model will be described in detail in the following specific embodiment part. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 The overall structure of the utility model.

[0022] Figure 2 Part of the structure of the utility model Figure One .

[0023] Figure 3 Part of the structure of the utility model Figure Two .

[0024] Figure 4 : The internal three-dimensional structure diagram of the utility model.

[0025] Figure 5 : The explosion drawing of the utility model.

[0026] Reference signs: 11-pen barrel, 12-pen head, 21-first step, 22-third step, 23-second step, 31-pen nib, 32-damping block, 33-fixing block, 34-second boss, 35-third spring, 4-advancing assembly, 41-core storage tube, 42-head, 43-bulge, 44-second shoulder, 45-third boss, 51-sleeve, 52-first shoulder, 61-first spring, 62-movable ring, 7-core clamping assembly, 71-locking piece, 72-first boss, 73-spherical cavity, 74-clamping groove, 75-conical surface, 76-rolling ball, 77-second spring. DETAILED DESCRIPTION

[0027] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.

[0028] Please refer to Figures 1-5 ;

[0029] The automatic pencil aims to improve the anti-core breaking function in the use process and improve the practicability, and specifically comprises a pen barrel 11, the pen barrel 11 is provided with a pen head 12 at the end, the pen head 12 is provided with a pen nib 31, an advancing assembly 4 and a sleeve 51 are arranged in the pen barrel 11, the sleeve 51 can slide relative to the pen barrel 11, and the two almost do not contact, a first step 21 and a limiting part are arranged in the pen barrel 11, wherein the limiting part can be a step or an additional limiting part, a space for the sleeve 51 to move is formed between the two, the distance between the first step 21 and the limiting part is greater than the length of the sleeve 51, a first spring 61 is arranged between the advancing assembly 4 and the first step 21, a resettable core clamping assembly 7 is arranged in the sleeve 51, the end of the advancing assembly 4 extends into the sleeve 51, and under the action of friction, the sleeve 51 is driven to move, and the end of the advancing assembly 4 can move relative to the sleeve 51 to resist the core clamping assembly 7; it should be noted that the end of the advancing assembly 4 away from the core clamping assembly 7 extends out of the end of the pen barrel 11 and is used for being pressed by a user;

[0030] In the initial state, the lead core is located in the advancing assembly 4 and falls to the core clamping assembly 7, when the advancing assembly 4 is pressed, under the action of friction, the sleeve 51 and the core clamping assembly 7 move forward together with the advancing assembly 4, when the sleeve 51 contacts the limiting part, the movement is stopped, but the advancing assembly 4 continues to advance and resists the core clamping assembly 7, and the core clamping assembly 7 is pushed forward to open the core clamping assembly 7, so that the lead core passes through to the pen head 12 part;

[0031] After loosening the advancing assembly 4 resets backward under the action of the first spring 61, synchronously drives the sleeve 51 and the core clamping assembly 7 to reset backward, when the sleeve 51 contacts with the end of the first spring 61, stops backward reset, the advancing assembly 4 continues to retreat and separates from the core clamping assembly 7, and the core clamping assembly 7 also resets backward, and then tightens to clamp the lead core, in the resetting process, each component is relatively moved with the lead core;

[0032] Based on the above process, when the advancing assembly 4 is pressed next time, since the core clamping assembly 7 clamps and fixes the lead core, the lead core will advance a distance and enter the damping block 32, after repeatedly pressing the advancing assembly 4 for many times, the lead core finally penetrates out of the pen point 31 for the user to write.

[0033] The research results show that the force of adult normal writing is about 0.5-0.7 Newton, and the force of primary school students writing usually reaches more than 2 Newton, which is the main reason for the lead core breaking during writing; in the existing design, the pen point 31, the core clamping assembly 7 and the advancing assembly 4 are all provided with a channel for the lead core to penetrate, and the channels are all coaxial linear designs;

[0034] When the force used by the user during writing is too large, the lead core outside the pen point 31 receives an axial force in the direction of the lead core, when the axial force received by the lead core is greater than the elastic force of the first spring 61, since the lead core cannot retreat relative to the core clamping assembly 7, the lead core pushes the core clamping assembly 7 and the sleeve 51 to retreat and compresses the first spring 61, so that the lead core retreats and cancels the opposite force;

[0035] When the force applied on the lead core disappears, the sleeve 51 is reset under the action of the first spring 61, and drives the core clamping assembly 7 to move downward, synchronously drives the lead core to move downward, so that the lead core re-extends out of the pen head 12.

[0036] The sleeve 51 and the core clamping assembly 7 are arranged in a movable manner, when the force received by the lead core is greater than the elastic force of the first spring 61, the sleeve 51 and the core clamping assembly 7 retreat synchronously and compress the first spring 61, the lead core also retreats synchronously and cancels the opposite force, so that the lead core is not easy to break, when the lead core leaves the paper surface, the force applied on the lead core disappears, the sleeve 51 is reset under the action of the first spring 61, and drives the core clamping assembly 7 to move downward, synchronously drives the lead core to move downward, so that the lead core re-extends out of the pen head 12 for the user to write.

[0037] Preferably, the first step 21 is provided with a movable ring 62, the first spring 61 is in contact with the movable ring 62, and the contact area of the sleeve is increased.

[0038] The utility model relates to one of the implementation of the sandwich assembly 7, specifically includes a pair of locking piece 71 that is arranged in the sleeve 51, and the opposite, and every locking piece 71 outer edge is equipped with first boss 72 and spherical nest 73, and the opposite surface has axial setting, and the clamping groove 74 for locking lead core is used;First shoulder 52 is arranged on the inner wall of sleeve 51, and the inner wall of the front end of first shoulder 52 is equipped with the expansion conical surface 75;A pair of ball 76 is arranged between spherical nest 73 and conical surface 75 correspondingly;Second spring 77 is arranged between first boss 72 and first shoulder 52;

[0039] Preferably, locking piece 71 adopts metal material support, and compared with prior art, the plastic material is made more durable, and secondly, clamping groove 74 is several longitudinal distribution teeth, can better fix lead core, prevent its retreat;

[0040] Pen point 31 is movably arranged in pen head 12, and damping block 32 is arranged behind pen point 31, and the end of damping block 32 extends and is inserted into pen point 31 in interference fit;Fixed block 33 is arranged behind damping block 32, and the fixed block 33 is arranged in pen head 12 in interference fit;Damping block 32 is provided with a passage for lead core, and the outer periphery of damping block 32 is provided with second boss 34, and third spring 35 is arranged between second boss 34 and fixed block 33, and it needs to be explained that second step 23 is arranged in pen head 12, and second step 23 is in contact with second boss 34 to limit the activity range.

[0041] In the initial state, lead core is located in the advancing assembly 4 and falls to the sandwich assembly 7, when the advancing assembly 4 is pressed, the sleeve 51 and the sandwich assembly 7 move forward together under the action of friction, when the sleeve 51 contacts the limiting portion, the movement stops, but the advancing assembly 4 continues to advance and contacts the sandwich assembly 7, the sandwich assembly 7 moves forward in the process of advancing, the two locking pieces 71 compress the second spring 77, the pair of balls 76 have more activity space between the conical surfaces, so that the distance between the two locking pieces 71 is increased, and then the lead core passes between the two locking pieces 71 to the position of the damping block 32;

[0042] Then the advancing assembly 4 is released, and the sleeve 51 and the sandwich assembly 7 are reset and retreat under the action of the first spring 61, when the sleeve 51 contacts the end of the first spring 61, the retreat stops and the reset is completed, the advancing assembly 4 continues to retreat and separates from the sandwich assembly 7, and the second spring 77 resets and pushes the two locking pieces 71 backward, the two balls 76 retreat and are pressed between the two locking pieces 71 under the action of the conical surface 75, so that the lead core is clamped and prevented from retreating, after the advancing assembly 4 is pressed for many times, the lead core passes through the damping block 32 and out of the pen point 31.

[0043] Further, the lead core slightly extends out of the pen point 31, and the lead core and the end of the pen point 31 simultaneously contact the paper during writing. However, the lead core is continuously worn during writing, and the pen point 31 is continuously retracted to compress the third spring 35. It can be understood that the part of the lead core extending out of the pen point 31 remains unchanged, and only the pen point 31 is retracted into the pen head 12. When the lead core and the end of the pen point 31 are away from the paper, the third spring 35 is reset to push the damping block 32 and the pen point 31 to move forward and extend. Since the damping block 32 and the lead core have friction therebetween, the lead core is synchronously moved forward during the forward movement, so that the automatic feeding action of the lead core is realized. It should be noted that the lead core can move forward relative to the core clamping assembly 7 but cannot retreat, so that the previous movement of the lead core is not hindered.

[0044] In addition, the lead core slightly extends out of the pen point 31, and the lead core has a tendency to retreat when excessive force is applied during writing. Based on the above embodiment, the pen point 31 part and the sleeve 51 and the core clamping assembly 7 as a whole will be retracted to offset the external force applied to the lead core, so as to prevent the lead core from breaking.

[0045] In an embodiment of the advancing assembly 4, the utility model specifically comprises a core storage tube 41, the front end of the core storage tube 41 is provided with a head 42, a plurality of lead cores can be stored in the core storage tube 41, and the head 42 is provided with a passage through which only one lead core passes. The head 42 extends into the sleeve 51, and the two sides of the head 42 are provided with protrusions 43 in contact with the inner wall of the sleeve 51.

[0046] The first spring 61 is arranged between the first step 21 and the end of the core storage tube 41, and the other end of the core storage tube 41 is provided with a second shoulder 44 in contact with the third step 22 of the inner wall of the pen barrel 11 to prevent the core storage tube 41 from being withdrawn from the pen barrel 11.

[0047] Since the sleeve 51 almost does not contact the inner wall of the pen barrel 11, there is almost no friction therebetween, so that the sleeve 51 can be driven to move up and down through the contact between the protrusions 43 and the sleeve 51. When the sleeve 51 contacts the limiting part, the core storage tube 41 and the head 42 continue to advance to overcome the friction between the protrusions 43 and the sleeve 51, so that the head 42 is in contact with the end of the locking piece 71 and drives the locking piece 71 to move forward.

[0048] Preferably, a third protrusion 45 is arranged at the position of the head 42. After the head 42 is in contact with the locking piece 71 by overcoming the friction relative to the sleeve 51 and drives the locking piece 71 to move downward and continue to move, when the head 42 extends into the sleeve 51 by a distance, the third protrusion 45 is in contact with the end of the sleeve 51 to prevent the head from further moving downward. That is, when the two locking pieces 71 are completely opened, the driving of the locking piece 71 to continue to move downward is stopped, so as to play a positioning role.

[0049] It is apparent for a person skilled in the art that the present application is not limited to the details of the above-described exemplary embodiments, but that it can be implemented in other concrete forms without departing from the spirit or the essential characteristics of the present application. Therefore, the embodiments should be considered as exemplary and non-limiting, the scope of the present application being defined by the claims appended hereto rather than by the above description, and all the changes which fall within the meaning and the scope of the equivalent elements of the claims are intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims to the figures in which the reference signs are used.

[0050] Furthermore, it should be understood that although the present specification describes exemplary embodiments, not every embodiment contains only one independent technical solution, and the present specification is described in this way only for the sake of clarity, and a person 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 a person skilled in the art can understand.

Claims

1. A break-proof automatic compensation pencil, comprising a pencil shaft (11) and a pencil head (12) provided at the end of the pencil shaft (11), wherein a pencil tip (31) is arranged in the pencil head (12), characterized in that: a propelling assembly (4) is arranged in the pencil shaft (11), a first step (21) and a limiting part are arranged, a first spring (61) is arranged between the propelling assembly (4) and the first step (21), a sleeve (51) is arranged between the first step (21) and the limiting part, and the two ends of the sleeve (51) are in contact with the limiting part and the first spring (61) respectively. A resettable core clamping assembly (7) is arranged in the sleeve (51), the end of the propelling assembly (4) extends into the sleeve (51) and drives the sleeve (51) to move under the action of friction, and the end of the propelling assembly (4) can move relative to the sleeve (51) to contact the core clamping assembly (7) by overcoming the friction. The first step (21) is provided with a movable ring (62), and the first spring (61) is in contact with the movable ring (62).

2. A break-proof, self-compensating pencil as defined in claim 1, wherein: The core clamping assembly (7) comprises a pair of locking pieces (71) arranged in the sleeve (51), which are opposite to each other, and each locking piece (71) is provided with a first boss (72) and a spherical recess (73) on the outer edge, and the opposite surfaces are provided with axial clamping grooves (74) for locking the lead core.

3. The break-proof, self-compensating pencil of claim 1, wherein: A first shoulder (52) is arranged on the inner wall of the sleeve (51), and a tapered surface (75) is arranged on the inner wall of the front end of the first shoulder (52). A pair of balls (76) are arranged between the spherical recess (73) and the tapered surface (75). A second spring (77) is arranged between the first boss (72) and the first shoulder (52). The propelling assembly (4) comprises a core storage tube (41), the front end of the core storage tube (41) is provided with a head (42), the head (42) extends into the sleeve (51), and the two sides of the head (42) are provided with protrusions (43) in contact with the inner wall of the sleeve (51).

4. The break-proof, self-compensating pencil of claim 1, wherein: The first spring (61) is arranged between the first step (21) and the end of the core storage tube (41), the other end of the core storage tube (41) is provided with a second shoulder (44), and the second shoulder (44) is in contact with a third step (22) on the inner wall of the pencil shaft (11). The pencil tip (31) is movably arranged in the pencil head (12), a damping block (32) is arranged behind the pencil tip (31), and the extended end of the damping block (32) is in interference fit and extends into the pencil tip (31).

5. The break-proof, self-compensating pencil of claim 3 wherein: A fixed block (33) is arranged behind the damping block (32), a channel is arranged in the damping block (32) for the lead core to pass through, a second boss (34) is arranged on the outer periphery of the damping block (32), and a third spring (35) is arranged between the second boss (34) and the fixed block (33). ​

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