CN214420045U - Automatic pencil lead capable of preventing short lead from falling out - Google Patents
Automatic pencil lead capable of preventing short lead from falling out Download PDFInfo
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- CN214420045U CN214420045U CN202120528541.7U CN202120528541U CN214420045U CN 214420045 U CN214420045 U CN 214420045U CN 202120528541 U CN202120528541 U CN 202120528541U CN 214420045 U CN214420045 U CN 214420045U
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Abstract
The utility model discloses an automatic lead pen that can prevent that short lead core from falling out, including pen-holder and nib, the nib is equipped with the nib pipe, is equipped with lead core fixture in the pen-holder, and the nib pipe includes nib pipe main part and nib pipe deformation portion, and nib pipe main part wears to establish the one end of keeping away from the pen-holder at the nib to refill guide channel has, refill guide channel be the cylinder structure who suits with the pencil core, and nib pipe deformation portion is located the outer end of nib pipe main part, and forms the refill deformation mouth with refill guide channel intercommunication. By adopting the technical scheme, the outer end of the pencil lead is not round any more, and the rest part which does not enter the deformation part of the pencil tip tube is still round, so that a falling-off prevention structure with a small outer part and a large inner part is formed, and the broken short lead can be effectively prevented from falling out of the pencil tip tube; and because the outer end of the pencil core is no longer circular, even if the broken short pencil core is used, the pencil core can not rotate in the pencil point tube during writing, and the writing feeling is not influenced.
Description
Technical Field
The utility model relates to a stationery technical field, concretely relates to can prevent that short lead core from falling out from automatic lead core pen.
Background
The pencil is a common writing tool, the early pencil is a lead strip or a graphite block, the later pencil is developed into a wood-holder pencil, and the pencil lead is also developed for solving the problem of complicated pencil sharpening process by using the wood-holder pencil.
However, the lead of the automatic lead pen is thin and easy to break, which not only causes waste, but also affects the writing experience. The propelling pencil is generally divided into a propelling type and a clutch type, the propelling pencil pushes out a pencil lead by a mechanical device in a pencil holder, the clutch type pushes out and tightens a pencil point in the process of separating and combining the pencil lead by two symmetrical pencil point flaps, and the clutch type pencil can prevent a short lead from falling out, but the pencil point flaps are very small, so the clutch type pencil is not suitable for being used for common pencil leads with the diameter of less than 1 mm. The core part of the propelling pencil lead core is positioned in the penholder and is far away from the pencil point, and the pencil point tube is only a hollow cylindrical tube, so that the broken short lead core cannot be clamped and can fall out of the pencil point tube.
In addition, even if the broken or almost used short refill is not removed from the nib tube due to its frictional force with the tube wall, the tip of the refill always contacts the paper surface on the same plane due to the contact force between the nib and the paper surface rotating in the nib tube during continuous writing, so that the writing handwriting becomes thick and thin.
The existing automatic pencil lead pen does not well solve the problem of short lead utilization, and the solution of the problem becomes urgent.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides an automatic pencil lead pen which can prevent the short pencil lead from falling out.
The technical scheme is as follows:
the utility model provides an automatic pencil that can prevent short pencil core from falling out, includes the pen-holder and installs the nib in pen-holder one end, the one end that the pen-holder was kept away from to the nib is provided with the nib pipe, be provided with the pencil core fixture with nib pipe looks adaptation in the pen-holder, its main points lie in: the pencil point pipe comprises a pencil point pipe main body part and a pencil point pipe deformation part, the pencil point pipe main body part is arranged at one end, far away from the pencil holder, of the pencil point and is provided with a pencil lead guide channel, the pencil lead guide channel is of a cylindrical structure matched with a pencil lead, the pencil point pipe deformation part is arranged at the outer end of the pencil point pipe main body part and forms a pencil lead deformation port communicated with the pencil lead guide channel, the minimum width of the pencil lead deformation port is smaller than the diameter of the pencil lead so as to cut the side wall of the pencil lead, and the maximum width of the pencil lead deformation port is larger than the diameter of the pencil lead so as to form a chip removal channel between the pencil point pipe main body part and the pencil lead.
By adopting the structure, the structure of the automatic pencil lead core pen does not need to be greatly changed, only the outer end of the pencil lead core tube is required to be provided with the pencil lead tube deformation part, the pencil lead can be cut, the outer end of the pencil lead is not circular, meanwhile, pencil lead chips are discharged from the chip removal channel, and the rest parts which do not enter the pencil lead tube deformation part are still circular, so that a small-outside and large-inside anti-falling structure is formed, the broken short lead can be effectively prevented from falling out of the pencil lead tube, in addition, the short lead in the pencil lead tube can be supported by the pencil lead currently clamped by the lead core clamping mechanism, the retraction of the short lead can be effectively prevented, the continuous use of the short lead is ensured, and the waste of the pencil lead is reduced; and because the outer end of the pencil core is no longer circular, even if the broken short pencil core is used, the pencil core can not rotate in the pencil point tube during writing, and the writing feeling is not influenced completely.
Preferably, the method comprises the following steps: the pencil lead deformation port is oval, the short diameter of the pencil lead deformation port is smaller than the diameter of the pencil lead so as to cut two side walls of the pencil lead, and the long diameter of the pencil lead deformation port is larger than the diameter of the pencil lead so as to form the chip removal channels on two sides of the pencil lead respectively. Structure more than adopting, not only easily processing makes the outer end of pencil lead be the tenon structure moreover, easily writes and the picture more, has double bits passageway simultaneously, can guarantee the smooth and easy nature of chip removal, reduces the cutting resistance of pencil lead.
Preferably, the method comprises the following steps: the deformed parts of the nib tube located on both sides of the long diameter of the refill deforming port form cutting edges whose thickness is gradually reduced toward the direction close to the long diameter of the refill deforming port. By adopting the structure, the cutting resistance of the lead core can be effectively reduced, and the lead core is not easy to break.
Preferably, the method comprises the following steps: the nib tube main body part and the nib tube deformation part are integrally formed. By adopting the structure, the connection strength of the pen point tube main body part and the pen point tube deformation part is greatly improved.
Preferably, the method comprises the following steps: the pen point tube mounting sleeve is mounted in the pen point, the pen point tube main body portion is locked on the pen point tube mounting sleeve after being inserted into the pen point, and the pen point tube mounting sleeve is provided with a pen core entering channel in butt joint with the pen core guiding channel. By adopting the structure, the reliable installation of the pencil point tube can be ensured, and the service life of the automatic pencil lead is prolonged.
Preferably, the method comprises the following steps: the center position of the nib tube mounting sleeve is provided with a refill guide ring in an annular structure, the center position of the refill guide ring forms a refill inlet channel, and one end, far away from the nib tube main body part, of the refill inlet channel is in an open structure. By adopting the structure, the pencil lead can more easily enter the lead guide channel by arranging the lead guide ring.
Compared with the prior art, the beneficial effects of the utility model are that:
the automatic pencil lead core capable of preventing the short lead core from falling out in the technical scheme has the advantages that the structure is novel, the design is ingenious, the realization is easy, the structure of the automatic pencil lead core is not required to be greatly changed, only the outer end of the pencil lead tube is provided with the pencil lead tube deformation part, the pencil lead core can be cut, the outer end of the pencil lead core is not circular, meanwhile, pencil lead scraps are discharged from the scrap discharge channel, the rest parts which do not enter the pencil lead tube deformation part are still circular, a small-outside and large-inside anti-falling structure is formed, the broken short lead core can be effectively prevented from falling out of the pencil lead tube, the short lead core in the pencil lead tube can be supported by the pencil lead core currently clamped by the lead core clamping mechanism, the short lead can be effectively prevented from retracting, the continuous use of the short lead is ensured, and the waste of the pencil lead is reduced; and because the outer end of the pencil core is no longer circular, even if the broken short pencil core is used, the pencil core can not rotate in the pencil point tube during writing, and the writing feeling is not influenced completely.
Drawings
FIG. 1 is a schematic diagram of an automatic pencil;
FIG. 2 is a partial cross-sectional view of an automatic lead pen;
FIG. 3 is a schematic view showing the fitting relationship between the nib tube and the lead;
fig. 4 is a schematic structural view of the nib holder mounting sleeve.
Detailed Description
The present invention will be further described with reference to the following examples and accompanying drawings.
As shown in fig. 1 and 2, an automatic pencil with a lead core capable of preventing short lead core from falling out comprises a main penholder 1 and a pencil point 2 arranged at one end of the penholder 1, wherein a pencil point tube 3 is arranged at one end of the pencil point 2 far away from the penholder 1, a lead core clamping mechanism 5 matched with the pencil point tube 3 is arranged in the penholder 1, one function of the lead core clamping mechanism 5 is to clamp the pencil core 6, and the other function is to cooperate with the pencil point tube 3 to convey the pencil core 6 one by one.
Referring to fig. 2 and 3, the nib 3 includes a nib body 3a and a nib deformation portion 3b, and in this embodiment, the nib body 3a and the nib deformation portion 3b are integrally formed, and thus the structural strength is high. The pencil point tube main body part 3a penetrates through one end, far away from the penholder 1, of the pencil point 2 and is provided with a pencil lead guide channel 3a1, the pencil lead guide channel 3a1 is of a cylindrical structure matched with the pencil lead 6, the pencil point tube deformation part 3b is located at the outer end of the pencil point tube main body part 3a and forms a pencil lead deformation port 3b1 communicated with the pencil lead guide channel 3a1, the minimum width of the pencil lead deformation port 3b1 is smaller than the diameter of the pencil lead 6 to cut the side wall of the pencil lead 6, the maximum width of the pencil lead deformation port 3b1 is larger than the diameter of the pencil lead 6 to form a chip removal channel 3c with the pencil lead 6.
In general, after the pencil lead 6 in a cylindrical structure passes through the lead guide channel 3a1, the pencil lead is cut into a non-cylindrical structure at the lead deformation port 3b1, meanwhile, pencil lead scraps are discharged from the scrap discharge channel 3c, and the rest part which does not enter the deformation part 3a of the pencil lead tube is still circular, so that a small-outside and large-inside anti-falling structure is formed, broken short leads can be effectively prevented from falling out of the pencil lead tube 3, and the waste of the pencil lead 6 is reduced; moreover, the outer end of the pencil lead 6 is not circular any more, so that even if the broken short pencil lead is used, the pencil lead can not rotate in the pencil point tube 3 during writing, and the writing feeling is not influenced completely.
Further, the pencil core warp mouthful 3b1 and is the ellipse, the minor diameter that the pencil core warp mouthful 3b1 is less than pencil core 6's diameter, with the both sides wall of cutting pencil core 6, the pencil core warp mouthful 3b 1's long diameter and is greater than pencil core 6's diameter, with form chip removal passageway 3c respectively in pencil core 6's both sides, not only easily processing, and make pencil core 6's outer end be the tenon structure, more easily write and the picture, double chip removal passageway 3c has simultaneously, can guarantee the smoothness nature of chip removal, reduce pencil core 6's cutting resistance.
Referring to fig. 2, the nib deformation portions 3b located on both sides of the long diameter of the lead deformation opening 3b1 form cutting edges 3b2 whose thickness gradually decreases toward the long diameter of the lead deformation opening 3b1, which can effectively reduce the cutting resistance of the lead, prevent breakage, and save labor when pressing the mechanical pencil.
Referring to fig. 2 and 4, the nib 2 is provided with a nib mounting sleeve 4, the nib body portion 3a is inserted into the nib 2 and locked to the nib mounting sleeve 4, and the nib mounting sleeve 4 has a nib entering passage 4a abutting against the nib guide passage 3a 1. And, the central point of the nib tube mounting sleeve 4 is provided with a refill guide ring 4b which is in an annular structure, the central point of the refill guide ring 4b forms a refill inlet channel 4a, and one end of the refill inlet channel 4a, which is far away from the nib tube main body part 3a, is in an open structure, so that the pencil refill 6 can more easily enter the refill inlet channel 4 a.
Further, a plurality of process notches 4b1 distributed in an annular array are formed in the end face of one end, away from the nib tube main body portion 3a, of the refill guide ring 4b, so that the end, into which the pencil lead 6 enters, of the refill guide ring 4b has a larger deformation amount, and the pencil lead 6 is prevented from being broken due to interference with the pencil lead 6.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and the scope of the present invention.
Claims (6)
1. The utility model provides an automatic pencil that can prevent short pencil core from falling out, includes pen-holder (1) and installs nib (2) in pen-holder (1) one end, the one end that pen-holder (1) were kept away from in nib (2) is provided with a sharp pipe (3), be provided with pencil core fixture (5) with a sharp pipe (3) looks adaptation in pen-holder (1), its characterized in that: the pencil point tube (3) comprises a pencil point tube main body part (3a) and a pencil point tube deformation part (3b), the pencil point tube main body part (3a) penetrates through one end, away from the pencil holder (1), of the pencil point (2) and is provided with a pencil lead guide channel (3a1), the pencil lead guide channel (3a1) is of a cylindrical structure matched with the pencil lead (6), the pencil point tube deformation part (3b) is located at the outer end of the pencil point tube main body part (3a) and forms a pencil lead deformation port (3b1) communicated with the pencil lead guide channel (3a1), the minimum width of the pencil lead deformation port (3b1) is smaller than the diameter of the pencil lead (6) so as to cut the side wall of the pencil lead (6), and the maximum width of the pencil lead deformation port (3b1) is larger than the diameter of the pencil lead (6) so as to form a chip removal channel (3c) with the pencil lead (6).
2. An automatic pencil as recited in claim 1, wherein the short lead is prevented from falling out, the automatic pencil comprising: the pencil lead deformation port (3b1) is oval, the short diameter of the pencil lead deformation port (3b1) is smaller than the diameter of the pencil lead (6) so as to cut two side walls of the pencil lead (6), and the long diameter of the pencil lead deformation port (3b1) is larger than the diameter of the pencil lead (6) so as to form the chip removal channels (3c) on two sides of the pencil lead (6) respectively.
3. An automatic pencil as recited in claim 2, wherein the short lead is prevented from falling out, the automatic pencil comprising: the nib deformation parts (3b) located on both sides of the long diameter of the refill deformation opening (3b1) form cutting edges (3b2) whose thickness is gradually reduced toward the long diameter of the refill deformation opening (3b 1).
4. An automatic pencil as recited in claim 1, wherein the short lead is prevented from falling out, the automatic pencil comprising: the nib barrel main body portion (3a) and the nib barrel deformation portion (3b) are integrally formed.
5. An automatic pencil as recited in claim 1, wherein the short lead is prevented from falling out, the automatic pencil comprising: the pen point tube installing sleeve is characterized in that a pen point tube installing sleeve (4) is installed in the pen point (2), the pen point tube main body part (3a) is locked on the pen point tube installing sleeve (4) after being inserted into the pen point (2), and a pen core entering channel (4a) in butt joint with the pen core guiding channel (3a1) is arranged on the pen point tube installing sleeve (4).
6. An automatic pencil as recited in claim 5, wherein the short lead is prevented from falling out, the automatic pencil comprising: the center position of the nib tube mounting sleeve (4) is provided with a refill guide ring (4b) which is of an annular structure, the center position of the refill guide ring (4b) forms a refill entering channel (4a), and one end, far away from the nib tube main body part (3a), of the refill entering channel (4a) is of an open structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120528541.7U CN214420045U (en) | 2021-03-12 | 2021-03-12 | Automatic pencil lead capable of preventing short lead from falling out |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120528541.7U CN214420045U (en) | 2021-03-12 | 2021-03-12 | Automatic pencil lead capable of preventing short lead from falling out |
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| Publication Number | Publication Date |
|---|---|
| CN214420045U true CN214420045U (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120528541.7U Active CN214420045U (en) | 2021-03-12 | 2021-03-12 | Automatic pencil lead capable of preventing short lead from falling out |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114987087A (en) * | 2022-06-16 | 2022-09-02 | 深圳楠凯科技有限公司 | Mechanical pencil and production method thereof |
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2021
- 2021-03-12 CN CN202120528541.7U patent/CN214420045U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114987087A (en) * | 2022-06-16 | 2022-09-02 | 深圳楠凯科技有限公司 | Mechanical pencil and production method thereof |
| CN114987087B (en) * | 2022-06-16 | 2024-02-02 | 深圳楠凯科技有限公司 | Propelling pencil and method for producing the same |
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