CN110356145B

CN110356145B - Pen with pen tip

Info

Publication number: CN110356145B
Application number: CN201910663256.3A
Authority: CN
Inventors: 吴睿富
Original assignee: Xi'an Those Years Technology Network Co ltd
Current assignee: Xi'an Those Years Technology Network Co ltd
Priority date: 2019-07-22
Filing date: 2019-07-22
Publication date: 2024-03-22
Anticipated expiration: 2039-07-22
Also published as: CN110356145A

Abstract

The invention discloses a pen, which comprises a pen holder and a pen core arranged on the pen holder, wherein a sleeve and a rotary drum are sequentially sleeved outside the pen holder, and the rotary drum is rotationally connected with the sleeve; the pen holder is driven to move when the rotary drum rotates, so that the pen core passes through the first perforation and the second perforation and is exposed out of the top of the rotary drum or hidden in the sleeve; a movable plate is arranged between the sleeve and the rotary drum, and when the rotary drum rotates, the movable plate is driven to move, so that the movable plate is close to or far from the upper part of the first perforation, and the blocking or communication between the pen core and the outside is realized; the length of the pen holder is 12cm-18cm. According to the invention, through the rotation of the rotary drum, multiple effects such as exposure and blockage of the pen core are realized, the strength is saved, the problems of ink overflow and the like are avoided, and the effect of rotating the pen core is realized.

Description

Pen with pen tip

Technical Field

The invention relates to the technical field of office supplies, in particular to a pen structure with a rotary core-out and core-blocking function.

Background

With the development of science and technology, the traditional teaching mode is changed, wherein the change of the traditional teaching tool is most prominent. Specifically, most of traditional teaching tools are chalks, and the traditional teaching tools are now changed into white board pens, namely mark pens, which are writing tools with ink as a medium, so that the traditional chalk is effectively replaced, the use is convenient, and adverse effects such as dust and the like caused by cleaning after the traditional chalk is used can be completely overcome.

In the prior art, the whiteboard pen is blocked after being fastened by the pen cap, and has the following defects:

1. when the pen cap is blocked or opened, a certain force is required, and when the buckle is relatively tight or the force of a user is relatively small, the pen cap is not easy to pull out, so that the pen cap is inconvenient to use and even the teaching time is influenced;

2. most of the pen caps and the pen holders are connected through buckles, after the pen caps are used for many times, the buckles are loosened, the pen caps cannot be well matched with the pen holders, and the problem of pen cap loss is caused;

3. in the whiteboard pen, the pen core is connected with the ink, when the whiteboard pen is opened, the ink is easy to spill out of the pen core, clothes or hands are polluted, and the like, so that the pollution of the peripheral environment is caused;

in the prior art, the ink is unstable due to repeated pulling, and flows out of the pen core easily to flow into the pen cap, so that ink is wasted, and meanwhile, when the pen cap is pulled down, excessive ink is polluted, so that the pen cap cannot be reused, and the pen cap is discarded.

Disclosure of Invention

The invention discloses a pen, which realizes the exposure and the blocking of a pen core through the rotation of a rotary drum, does not need to use excessive force, and simultaneously, does not have the problem that ink is exposed and pollutes the environment due to the opening of the pen core.

The technical scheme of the invention is as follows:

the pen comprises a pen holder and a pen core arranged on the pen holder, wherein a sleeve and a rotary drum are sequentially sleeved outside the pen holder, and the rotary drum is rotationally connected with the sleeve;

the pen holder is driven to move when the rotary drum rotates, so that the pen core passes through the first perforation and the second perforation and is exposed out of the top of the rotary drum or hidden in the sleeve;

a movable plate is arranged between the sleeve and the rotary drum, and when the rotary drum rotates, the movable plate is driven to move, so that the movable plate is close to or far from the upper part of the first perforation, and the blocking or communication between the pen core and the outside is realized;

the length of the pen holder is 12cm-18cm.

As a further improvement of the invention, one surface of the movable plate is provided with a sliding block, the inner wall of the rotary drum is provided with a first sliding groove, and the sliding block moves along the first sliding groove, so that the movable plate is far away from or near to the upper side of the first perforation, and the upper side of the first perforation is closed and opened. Through the matching of slider and spout, improved the convenience that the fly leaf removed, simultaneously, can be through directly extending or protruding etc. an organic whole setting slider at the surface of fly leaf, improvement production efficiency.

As a further improvement of the invention, the first sliding grooves are arranged in a plurality, and the first sliding grooves are distributed along the periphery of the second through hole, and each first sliding groove is correspondingly provided with a movable plate. The fly leaf is a plurality of, corresponds the setting with first spout, and then is convenient for set up to have arc isotructure of closed angle, and a plurality of closed angles combine to form circular structure, realize first fenestrate shielding, and then the refill just can't pass the perforation and expose.

As a further improvement of the invention, the first chute extends towards the second perforation from the outer edge of the inner wall of the top of the rotary drum to form an inclined chute. And the outer edge is taken as a starting point, and an inclined structure is formed, so that on one hand, the length of the first chute is increased, and on the other hand, the edge of the movable plate moves towards the vicinity of the first perforation, and shielding is realized.

As a further improvement of the invention, the tail end of each first chute among the plurality of first chutes is propped against the side part of the adjacent first chute. Through setting up on mutually, ensure that every first spout all has certain external force to support, strengthen its intensity.

As a further improvement of the invention, a limiting block is arranged on the other surface of the movable plate, and a limiting groove for limiting block movement is arranged on the outer wall of the sleeve. The limiting blocks are arranged on the other side, so that the two sides of the movable plate are respectively provided with the convex structures, the strength of the movable plate is improved, and if the movable plate is arranged on the same side, the strength of the other side is weaker; and a limiting groove is added, so that the limiting effect is achieved when the first sliding groove slides.

As a further improvement of the invention, the number of the limiting grooves is several, the limiting grooves are arranged along the circumferential direction of the first perforation, and the spacing is arranged between the limiting grooves. The limiting grooves are arranged in a plurality, so that each sliding block can be limited, and the number of the limiting grooves is consistent with that of the first sliding grooves; in addition, the distance is increased, so that the design space of the limiting block and the movable plate is increased, and conditions are created for the optimal design of the rear structure.

As a further development of the invention, the area of the cross section of the limiting block is smaller than the area of the cross section of the sliding block. The stopper is little less, guarantees spacing can, if be greater than the slider, then the spacing groove must increase, and the spacing groove is located the surface, and telescopic structure is restricted, if the cell body is too big, then the intensity of sleeve roof weakens.

As a further improvement of the invention, the pen holder is provided with the fixing part and the second chute arranged on the fixing part, the inner wall of the sleeve is provided with the convex rib, and when the rotary drum rotates, the convex rib moves along the second chute, so that the pen core is exposed out of the top of the rotary drum or hidden in the sleeve. Through protruding muscle structure and second spout, it is convenient to rotate, specifically, protruding muscle and second spout can set up a plurality ofly.

As a further improvement of the invention, the second chute is of a spiral structure, and the spiral angle of the spiral structure is 90-160 degrees. The spiral of the second chute is less than half a circle, namely, the second chute is not twisted by half a circle, if the second chute is twisted by more than half a circle, the distance of the convex rib becomes longer when the convex rib moves, and the rotary drum rotates for more circles, so that the second chute is inconvenient to use; the arrangement of less than half circle ensures that the second chute is not steeper and rotates slowly, and meanwhile, the radian is more gentle.

The beneficial effects of the invention are as follows:

compared with the prior art, the movable plate is used for blocking or unblocking the upper part of the first perforation, so that the pen core can be exposed or hidden after rotation. The pen core is exposed, excessive force is not needed, and the labor is saved.

Furthermore, in the invention, the pen cap is not needed, and the problems of pen cap loss and the like are avoided, and no matter which state, the pen core, the sleeve and the rotary drum are always rotationally connected, so that the disassembly and the separation are avoided, and the integrity of parts can be ensured.

In the invention, the communication between the perforations is realized by the movable plate arranged between the first perforation and the second perforation. When the pen refill is used, the pen refill can move up and down by rotating the rotary drum, and the exposure of holes can be realized, so that multiple purposes are achieved. The opening and blocking modes of the rotating device are wider in applicable crowd, and the rotating device can be used for users with small hand strength.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view of the installation of a pen according to the present invention.

Fig. 2 is a schematic structural view of a drum according to the present invention.

FIG. 3 is a second schematic view of a drum according to the present invention.

FIG. 4 is a third schematic view of the structure of the drum according to the present invention.

Fig. 5 is a schematic structural diagram of a movable plate according to the present invention.

Fig. 6 is a second schematic structural view of the movable plate according to the present invention.

Fig. 7 is a third schematic structural view of the movable plate according to the present invention.

Fig. 8 is a schematic structural view of a sleeve according to the present invention.

FIG. 9 is a second schematic structural view of the sleeve according to the present invention.

Fig. 10 is a front view of a sleeve provided by the present invention.

Fig. 11 is a schematic structural view of the pen container provided by the invention.

FIG. 12 is a second schematic view of the pen container according to the present invention.

Corresponding part names are indicated by numerals and letters in the drawings:

1. a penholder; 101. a pen core; 102. a fixing part; 103. a second chute; 2. a sleeve; 201. a first perforation; 202. a limit groove; 203. convex ribs; 204. a fastening part; 3. a rotating drum; 301. a second perforation; 302. a first chute; 303. a clamping groove; 4. a movable plate; 401. a slide block; 402. a limiting block; 5. an end cap.

Detailed Description

The present invention will be described in detail below with reference to the embodiments shown in the drawings, but it should be understood that the embodiments are not limited to the present invention, and functional, method, or structural equivalents and alternatives according to the embodiments are within the scope of protection of the present invention by those skilled in the art.

Referring to fig. 1, the pen comprises a pen holder 1 and a pen core 101 arranged on the pen holder 1, wherein a sleeve 2 and a rotary drum 3 are sequentially sleeved outside the pen holder 1, and the rotary drum 3 is rotationally connected with the sleeve 2;

the length of the pen holder 1 is 12cm-18cm

The sleeve 2 and the rotary drum 3 are respectively provided with a first perforation 201 and a second perforation 301, and when the rotary drum 3 rotates, the pen holder 1 is driven to move, so that the pen core 101 passes through the first perforation 201 and the second perforation 301 and is exposed out of the top of the rotary drum 3 or is hidden in the sleeve 2;

a movable plate 4 is arranged between the sleeve 2 and the rotary drum 3, and when the rotary drum 3 rotates, the movable plate 4 is driven to move, so that the movable plate 4 is close to or far from the upper part of the first perforation 201, and the blocking or communication between the pen core and the outside is realized.

Compared with the prior art, in the invention, the movable plate 4 realizes the blocking or unblocking of the upper part of the first perforation 201, and further can realize the exposure or hiding of the refill 101 after rotation. The pen core 101 is exposed, excessive force is not needed, and labor is saved.

Furthermore, in the invention, the pen cap is not needed, and the problems of pen cap loss and the like are avoided, and in any state, the pen core 101, the sleeve 2 and the rotary drum 3 are always rotationally connected, and the parts can not be detached and separated, so that the integrity of the parts can be ensured.

In the present invention, communication between the through holes is achieved by the movable plate 4 provided between the first through hole 201 and the second through hole 301. When the pen is used, by rotating the rotary drum 3, not only the pen core 101 can move up and down, but also the exposure of holes can be realized, so that the pen is multipurpose, and meanwhile, the pen is applicable to a wider crowd.

Example 1

Referring to fig. 1, the present embodiment mainly describes how the movable plate 4 is opened in the whole pen structure, specifically:

the pen comprises a pen holder 1 and a pen core 101 arranged on the pen holder 1, wherein a sleeve 2 and a rotary drum 3 are sequentially sleeved outside the pen holder 1, and the rotary drum 3 is rotationally connected with the sleeve 2;

referring to fig. 2 and 8, the sleeve 2 and the drum 3 are respectively provided with a first perforation 201 and a second perforation 301, the positions of the first perforation 201 and the second perforation 301 correspond to each other, and when the drum 3 rotates, the pen holder 1 is driven to move, so that the pen core 101 passes through the first perforation 201 and the second perforation 301 and is exposed out of the top of the drum 3 or is hidden in the sleeve 2;

a movable plate 4 is arranged between the sleeve 2 and the rotary drum 3, and specifically, the movable plate 4 is arranged between the outer wall of the top wall of the sleeve 2 and the inner wall of the top wall of the rotary drum 3; when the rotary drum 3 rotates, the movable plate 4 is driven to move, so that the movable plate 4 is close to or far from the upper side of the first perforation 201, and further, the first perforation 201 and the second perforation 301 are isolated, and the refill 101 is plugged or communicated with the outside.

Referring to fig. 5-7, in order to facilitate the movement of the movable plate 4, a sliding block 401 is disposed on one surface of the movable plate 4, referring to fig. 4, a first sliding groove 302 is disposed on the inner wall of the drum 3, and the sliding block 401 moves along the first sliding groove 302, so that the movable plate 4 is far from or near to the upper side of the first through hole 201, and the upper side of the first through hole 201 is closed and opened. Through the matching of slider and spout, improved the convenience that the fly leaf removed, simultaneously, can be through directly extending or protruding etc. an organic whole setting slider at the surface of fly leaf, improvement production efficiency.

In this embodiment, the movable plate 4 may have a triangle-like structure, and then one side of the triangle is arc-shaped, and the other side is excessively connected with the arc of the arc-shaped side, so that the movable plate 4 has a sharp angle, and both sides forming the sharp angle are straight sides.

When the pen is used, the rotary drum 3 rotates (assuming positive rotation at the moment), the pen holder 1 moves upwards, the pen core 101 moves upwards, meanwhile, the first sliding groove 302 rotates to enable the sliding block 401 to move towards the periphery of the top of the rotary drum 3, the upper portion of the first perforation 201 is communicated with the second perforation 301, the pen core 101 moves upwards, and the pen core 101 is exposed after passing through the first perforation 201 and the second perforation 301, so that writing is realized; after the rotary drum 3 is used up, when the rotary drum 3 is reversely rotated (opposite to the turning direction of opening at the moment), the first sliding groove 302 is rotated, and then the sliding block 401 on the rotary drum is driven to move, so that the sliding block moves from the edge side of the first sliding groove 302 towards the attachment of the second through hole 301, the isolation between the first through hole 201 and the second through hole 301 is realized, and meanwhile, the pen holder 1 moves downwards, so that the pen core 101 is stored and hidden in the sleeve 2.

In this embodiment, the length of the pen holder 1 is 12cm-18cm. When the length of the pen holder 1 is more than 18cm, the pen is too long, the transportation and the manufacture are troublesome, and the pen holder is unnecessary, so that the material is relatively wasted; if the length of the cartridge 1 is too short, the ink is contained little and at the same time, it is not easy to grasp. 12cm to 18cm, basically meets the effects of holding and containing a proper amount of ink; if the ink is less than 12cm, the ink is less or the crayon is not easy to hold unless the crayon is crayon, and the crayon does not need to hold magic water; if the length is more than 18cm, the user can easily be poked by overlong length; meanwhile, in transportation and placement, a longer pen container or writing case and the like are occupied.

Example 2

On the basis of embodiment 1, the present embodiment describes the specific structure of the movable plate 4.

Specifically, referring to fig. 2-4, the number of first sliding grooves 302 is several, the number of first sliding grooves 302 is distributed along the outer circumference of the second through hole 301, and specifically, the first sliding grooves 302 are disposed on the inner wall, and each first sliding groove 302 is correspondingly provided with a movable plate 4. The movable plate 4 is a plurality of, corresponds to the first spout 302 and sets up, and then is convenient for set up to have arc isotructure of closed angle, and a plurality of closed angles combine to form circular structure, realize the shielding of first perforation 201, and then refill 101 just can't pass first perforation 201 and expose. Specifically, when rotating, the movable plates 4 move towards the upper part of the first perforation 201 at the same time, then two sides of the sharp corners are correspondingly matched respectively, and after contacting, the sharp corners form a complete shielding plate to cover the upper part of the first perforation 201; when opened, the sharp corners uniformly move outwards under the action of the rotating force, and the upper part of the first through hole 201 is exposed.

Referring to fig. 4, the first chute 302 extends from the outer edge of the top inner wall of the drum 3 toward the second through hole 301 to form an oblique chute. The outer edge is taken as a starting point, and an inclined structure is formed at the same time, so that on one hand, the length of the first sliding groove 302 can be increased, and the sliding distance of the sliding block 401 can be prolonged; on the other hand, the top of the rotary drum 3 is of a circular structure, if the rotary drum is of a linear structure, circumferential motion matching during circumferential rotation is not easy to realize, and further sliding of the sliding block 401 is difficult to realize; at the same time, extending towards the second perforation 301 causes the edge of the flap 4 to move towards the vicinity of the first perforation 201, effecting a shielding.

Further, referring to fig. 4, the tail end of each first chute 302 of the plurality of first chutes 302 is propped against the side of another adjacent first chute 302. The tail end is propped against other side parts, so that a plurality of first sliding grooves 302 form a connected whole, the connection is convenient, and the strength is high; specifically, the middle position of the side part of the other adjacent first sliding groove 302 is propped against each other, so that the side part strength of the first sliding groove 302 is enhanced, each first sliding groove 302 is ensured to have a certain external force support, and the strength of each first sliding groove 302 is enhanced; by means of the structure of the adjacent tops, the sliding block 401 in the first sliding groove 302 at the back moves to the middle position of the first sliding groove 302 at the front at most, and a certain space is provided, so that the structure of the movable plate 4 can be arranged.

Example 3

In this embodiment, the description is mainly directed to limiting in the movement of the movable plate 4.

Referring to fig. 5-7, further, a stopper 402 is provided on the other surface of the movable plate 4, and through fig. 8-10, the outer wall of the sleeve 2 is provided with a limiting groove 202 for movement of the stopper 402, specifically, the stopper 402 has a cylindrical structure. By arranging the limiting block 402 and the limiting groove 202, when the sliding block 401 slides or the first sliding groove 302 fails to work, the sliding block 401 derails, the limiting block can play a limiting role, and meanwhile, the whole movable plate 4 can move. Referring to fig. 5-7, for the movable plate 4, the limiting block 402 is disposed on the other side, so that the two sides of the movable plate are respectively provided with a convex structure, and the strength of the movable plate is increased, and if the movable plate is disposed on the same side, the strength of the other side is weaker.

Referring to fig. 8-10, the number of the limiting grooves 202 is several, the limiting grooves 202 are disposed along the circumferential direction of the first through hole 201, and spaces are provided between the limiting grooves 202. The plurality of limit grooves 202 are circumferentially arranged, so that the rotation is more sensitive, compared with other forms of arrangement; meanwhile, unlike the previous first sliding groove 302, the distance between the limiting grooves 202 is set, and thus the distance between the limiting grooves 202 is smaller, and if the limiting grooves are set to be too long, the limiting grooves are easy to be failed in the simultaneous action with the first sliding groove 302, and on the other hand, the limiting distance is not easy to be adjusted. The limiting grooves 202 are arranged in a plurality, so that each sliding block 401 can be limited, and the number of the limiting grooves is consistent with that of the first sliding grooves; in addition, the spacing is increased, so that the design space of the limiting block 402 and the movable plate 4 is increased, and conditions are created for the optimal design of the rear structure.

In this embodiment, the limiting groove 202 may have a circular arc structure, which is convenient for production.

Further, referring to fig. 10, the cross-sectional area of the stopper 402 is smaller than the cross-sectional area of the slider 401. If the limiting block 402 is larger than the sliding block 401, the cross section area of the limiting groove 202 is enlarged, and the strength is weakened; specifically, the slider 401 may be provided in a polygonal shape such as a prismatic shape, and the stopper 402 may be provided in a cylindrical structure. The stopper 402 is little less, guarantees spacing can, if be greater than the slider, then the spacing groove must increase, and the spacing groove is located the surface, and telescopic structure is restricted, if the cell body is too big, then the intensity of sleeve roof weakens.

Example 4

In this embodiment, the assembly of the barrel 1 and the barrel 3 is mainly described.

Referring to fig. 11-12, in this embodiment, a fixing portion 102 and a second chute 103 disposed on the fixing portion 102 are disposed on the pen holder 1, referring to fig. 5, ribs 203 are disposed on the inner wall of the sleeve 2, and when the drum 3 rotates, the ribs 203 move along the second chute 103, so that the pen core 101 is exposed out of the top of the drum 3 or hidden in the sleeve 2. Through the convex rib 203 and the second chute 103, the rotation is convenient, and in particular, a plurality of convex ribs 203 and second chute 103 can be arranged; the plurality of the two can be parallel to each other.

Specifically, the second chute 103 has a spiral structure, and the spiral angle of the spiral structure is 90 ° -160 °. The limiting groove is of an arc-shaped structure with bending.

In this embodiment, the pen core 101 is taken as the head end of the pen holder 1, the cross-sectional area of the fixing portion 102 is smaller than the cross-sectional area of the tail end of the pen holder 1, and the front end of the fixing portion 102 is connected with the pen core 101 through the transition section, i.e. the pen holder 1 is in a structure with the diameter decreasing in a step shape in the vertical direction, wherein the diameter of the tail end is the largest, the diameter of the pen core at the head end is the smallest, and of course, in this embodiment, the second chute 103 may be disposed at the transition section, but compared with the structure disposed on the fixing portion 102, the pen rotation range is limited, specifically, the structure of the drum 3 may move wholly downwards, and after structural matching, the structure is not optimized as that disposed on the fixing portion 102.

In this embodiment, when the second sliding groove 103 is disposed on the fixing portion 102, the second sliding groove 103 is rotated to the end point of the connection between the fixing portion 102 and the tail end of the pen holder 1 along the connection between the fixing portion 102 and the transition section, the length is set along the fixing portion 102, the length range of rotation is matched with the length range of the fixing portion 102, and the whole fixing portion 102 is disposed as the threaded second sliding groove 103, so that the structure is ingenious, no excessive structure is needed, and the space is fully utilized.

In this embodiment, in order to realize the rotation connection of the sleeve 2 and the rotary drum 3, a plurality of fastening parts 204 are provided on the outer wall of the bottom of the sleeve 2, and prefabricated matching clamping grooves 303 are provided on the inner wall of the rotary drum 3, and the fastening parts 204 can rotate in the rotary drum 3 to realize the rotation connection. When the rotary drum 3 needs to be disassembled, the rotary drum is pulled out forcefully, and just like the existing pen cap, the rotary drum 3 is separated from the sleeve 2. In practical use, the sleeve 2 and the rotary drum 3 are embedded in the best state, and the sleeve and the rotary drum 3 are integrally embedded in the rotary drum 3 and can rotate in the rotary drum 3, but the structure is inconvenient for production, so that the sleeve and the rotary drum are arranged into two independent structures to be rotationally connected.

In the invention, compared with the prior art that the pen cap is pulled out, the movable plate 4 realizes the blocking or unblocking of the upper part of the first perforation 201, and further can realize the exposure or hiding of the pen core 101 after rotation. The pen core 101 is exposed, excessive force is not needed, and labor is saved.

In this embodiment, an end cap 5 may be further disposed at the end of the pen holder 1, so as to facilitate removal of the pen core and increase of ink.

In this embodiment, rotary drum 3 can be the structure of both ends big centre little, sets up the arc surface in the centre simultaneously, and the arc surface inwards is sunken, forms and holds the chamber, is convenient for the finger and places, realizes rotating.

The foregoing has shown and described the basic principles and main features of the present invention and the advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the above embodiments and descriptions are merely illustrative of the principles of the present invention, and various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined in the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The pen is characterized by comprising a pen holder (1) and a pen core (101) arranged on the pen holder (1), wherein a sleeve (2) and a rotary drum (3) are sequentially sleeved outside the pen holder (1), and the rotary drum (3) is rotationally connected with the sleeve (2);

the pen comprises a sleeve (2) and a rotary drum (3), wherein the sleeve is provided with a first perforation (201) and a second perforation (301) respectively, and when the rotary drum (3) rotates, the pen holder (1) is driven to move so that a pen core (101) passes through the first perforation (201) and the second perforation (301) and is exposed out of the top of the rotary drum (3) or hidden in the sleeve (2);

a movable plate (4) is arranged between the sleeve (2) and the rotary drum (3), and when the rotary drum (3) rotates, the movable plate (4) is driven to move, so that the movable plate (4) is close to or far from the upper part of the first perforation (201), and the blocking or communication between the pen core and the outside is realized;

the length of the pen holder (1) is 12cm-18cm;

the movable plate (4) is similar to a triangle structure, one side of the triangle structure is arc-shaped, and the other side of the triangle structure is excessively connected with the arc of the arc-shaped side, so that the movable plate (4) is provided with a sharp angle, and two sides forming the sharp angle are straight sides;

one surface of the movable plate (4) is provided with a sliding block (401), the inner wall of the rotary drum (3) is provided with a first sliding groove (302), and the sliding block (401) moves along the first sliding groove (302) so that the movable plate (4) is far away from or close to the upper side of the first perforation (201) to realize the closing and opening of the upper side of the first perforation (201);

the first sliding grooves (302) are arranged in a plurality, the first sliding grooves (302) are distributed along the periphery of the second through hole (301), and each first sliding groove (302) is correspondingly provided with a movable plate (4);

the first chute (302) extends towards the second perforation (301) by taking the outer edge of the inner wall of the top of the rotary drum (3) as a starting point to form an inclined chute;

the tail end of each first sliding groove (302) among the plurality of first sliding grooves (302) is propped against the side part of the other adjacent first sliding groove (302).

2. A pen according to claim 1, characterized in that the other side of the movable plate (4) is provided with a limiting block (402), and the outer wall of the sleeve (2) is provided with a limiting groove (202) for limiting the movement of the limiting block (402).

3. A pen according to claim 2, wherein the number of the limiting grooves (202) is several, the limiting grooves (202) are arranged along the circumference of the first through hole (201), and a space is provided between the limiting grooves (202).

4. A pen according to claim 2, characterized in that the area of the cross section of the stopper (402) is smaller than the area of the cross section of the slider (401).

5. A pen according to claim 1, wherein the pen holder (1) is provided with a fixing portion (102) and a second chute (103) arranged on the fixing portion (102), the inner wall of the sleeve (2) is provided with a convex rib (203), and when the rotary drum (3) rotates, the convex rib (203) moves along the second chute (103) to enable the pen core (101) to be exposed out of the top of the rotary drum (3) or hidden in the sleeve (2).

6. A pen as claimed in claim 5, characterized in that the second runner (103) is of a helical configuration with a helix angle of 90 ° -160 °.