CN110654137B - Pen holder and manufacturing method thereof - Google Patents

Abstract

The invention belongs to the field of stationery, and particularly relates to a pen holder and a manufacturing method thereof, wherein the pen holder comprises a pen tube, the lower end of the pen tube is in threaded connection with a pen point, the upper end of the pen tube is fixedly connected with a pen point, a pen clip is arranged on the side wall of the pen point, the pen point comprises a pen point tube, a driving mechanism is arranged in the pen point tube, and the lower end of the pen point tube is rotationally connected with the upper end of the pen tube through a connector; the pen clip comprises a sliding plate and a pressing strip fixedly connected to the side wall of the sliding plate, the sliding plate is slidably connected with the upper end of the pen point tube, permanent magnets capable of being driven by a driving mechanism are arranged on the side wall of the pressing strip, and a pressing block is fixedly connected to the side wall of the pressing strip. The pen holder is clamped or loosened by adjusting the relative positions of the permanent magnetic sliding block and the permanent magnetic block to generate suction or repulsion between the permanent magnetic sliding block and the permanent magnetic block, the operation difficulty is low, in addition, a temperature difference method and ingenious limiting between structures are adopted in the assembling process of the pen holder, an adhesive is not needed, the pollution to the environment is reduced, and the damage to a human body is reduced.

Description

Pen holder and manufacturing method thereof

Technical Field

The invention belongs to the field of stationery, and particularly relates to a pen holder and a manufacturing method thereof.

Background

The pen is a common writing and drawing tool in life, is the most widely used ball-point pen, gel pen and the like at present, and is usually provided with a pen clip on the side wall of a pen holder for the convenience of carrying and placing.

In the prior art, the pen clip is generally made of elastic metal or plastic materials, and is integrally formed or bonded with the pen holder, in the using process, a user needs to open the lower end of the pen clip at a certain angle, so that the bag edge of a pocket or the cover of a book and the like are inserted into a gap between the pen clip and the pen holder, then the pen clip is loosened, the bag edge or the cover is clamped and fixed under the elastic action of the pen clip, and when a pen is needed, the pen clip is opened again, and the pen is drawn out.

In the use process of the traditional pen holder, the gap between the pen clip and the pen holder is small, so that a user is inconvenienced, and meanwhile, the deformation capability of the pen clip is closely related to the material property of the pen clip, so that the metal pen clip is easy to deform after exceeding the elastic range of the metal pen clip, and the clamping capability is lost; the plastic pen clip is easy to break after exceeding the elastic range; the penholder no longer has the function of clamping and fixing.

Therefore, we propose a pen holder and a manufacturing method thereof to solve the above problems.

Disclosure of Invention

The invention aims to solve the problems that the existing pen clip is clamped by the elasticity of the existing pen clip, the operation is inconvenient, and meanwhile, once the pen clip exceeds the maximum elasticity range, irreversible damage can be caused; and the current penholder assembly needs to be bonded by using an adhesive, so that the fixing effect is poor, and the problems of large pollution emission can be caused.

In order to achieve the purpose, the invention adopts the following technical scheme: a pen holder comprises a pen tube, wherein a pen point is connected to the lower end of the pen tube in a threaded manner, a pen point is fixedly connected to the upper end of the pen tube, a pen clip is arranged on the side wall of the pen point, the pen point comprises a pen point tube, a driving mechanism is arranged in the pen point tube, and the lower end of the pen point tube is rotatably connected with the upper end of the pen tube through a connector;

the pen clip comprises a sliding plate and a pressing strip fixedly connected to the side wall of the sliding plate, the sliding plate is slidably connected with the upper end of the pen point tube, permanent magnets capable of being driven by a driving mechanism are arranged on the side wall of the pressing strip, and a pressing block is fixedly connected to the side wall of the pressing strip.

In the pen holder, the driving mechanism comprises a sliding column, a permanent magnet sliding block is fixedly sleeved outside the sliding column, the magnetic induction line of the permanent magnet sliding block is along the axis direction of the sliding column, the lower half part of the permanent magnet sliding block and the permanent magnet block attract each other in a heteropolar mode, the lower end of the sliding column is fixedly connected with a spring, a sliding groove is formed in the side wall of the lower portion of the pen head tube, and the permanent magnet sliding block freely slides in the sliding groove.

In foretell pen-holder, the connector includes solid fixed ring, connecting block, fixed block and turning block, coaxial fixed connection between solid fixed ring, connecting block, fixed block and the turning block, all be equipped with the bleeder vent on sliding column, connecting block, fixed block and the turning block.

In the pen holder, the inner side wall of the upper part of the pen tube is provided with the annular sliding groove, and the annular sliding groove is matched with the rotating block.

In the pen holder, the side wall of the sliding plate is fixedly connected with a T-shaped sliding block, the upper end face of the pen head tube is provided with a T-shaped sliding groove matched with the T-shaped sliding block, the upper end of the T-shaped sliding groove penetrates through the side wall of the pen head tube, the sliding plate is provided with a strip-shaped open groove, the opening direction of the strip-shaped open groove is parallel to the motion direction of the pressing strip, and the width of the strip-shaped open groove is larger than the diameter of the sliding column.

In the pen holder, the side wall of the pressing block, which is far away from the pressing strip, is in an arc shape corresponding to the side wall of the pen tube, and a convex point block corresponding to the pressing block is arranged on the side wall of the pen tube.

The invention also provides a manufacturing method of the penholder, which comprises the following steps:

s1, firstly, connecting the upper end of the pen point to the lower end of the pen tube in a threaded manner;

s2, inserting the T-shaped slide block on the slide plate along the T-shaped slide groove on the pen point tube, and inserting the T-shaped slide block to the bottommost part of the T-shaped slide groove;

s3, inserting the upper end of the sliding column from the lower end of the pen point tube, and penetrating the upper end of the sliding column out along the strip-shaped groove of the sliding plate, so that the tail end of the spring is flush with the lower end of the pen point tube;

s4, cooling the connector for 8-10 minutes under the conditions of normal pressure and-70 ℃ by using an air turbine refrigerator, and inserting the upper end and the lower end of the connector into the lower end of the pen point tube and the upper end of the pen tube respectively to enable the upper side wall and the lower side wall of the connecting block to be attached to the side walls of the pen point tube and the pen tube respectively;

and S5, finally, heating the whole penholder for 10-15 minutes under the conditions of normal pressure and 20 ℃ to finish the assembly of the penholder.

Compared with the prior art, the pen holder and the manufacturing method thereof have the advantages that:

1. according to the pen clip, the permanent magnet sliding block and the permanent magnet block are arranged, and acting force between the permanent magnet sliding block and the permanent magnet block is utilized to enable the pen clip to horizontally move relative to the pen holder, so that the pen clip is prevented from deforming beyond the elastic range of the pen clip, the service life of the pen clip is further prolonged, and the clamping and fixing functions of the pen holder can be normally used.

2. According to the invention, the sliding column and the spring are arranged, the pen clip is adjusted by utilizing the up-and-down movement of the sliding column, and the resetting of the sliding column is realized by the spring, so that the pen clip is not required to be broken with brute force, and the operation difficulty of a user is greatly reduced.

3. The pen tube is provided with the convex point block, and the relative position of the pressing block and the pen tube is adjusted, so that the pen tube can be conveniently used by various users such as doctors or students, various use requirements are met, and the application range is wide.

4. The invention can limit the sliding plate by the sliding column penetrating through the strip-shaped slot, and realize assembly by the mechanical characteristics of components, so that the assembly process is more energy-saving and environment-friendly.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a schematic front view of the present invention;

FIG. 4 is an exploded view of FIG. 3;

FIG. 5 is a schematic view showing the connection of the tip cartridge, the slide plate and the driving mechanism according to the present invention;

FIG. 6 is a schematic structural diagram of the connecting head of the present invention;

FIG. 7 is a schematic view showing the construction of a barrel for a pen according to the present invention;

FIG. 8 is a schematic view of the construction of the sliding plate according to the present invention;

FIG. 9 is a schematic view showing the connection between the slide plate and the T-shaped slider in the present invention;

FIG. 10 is a schematic view of the clamping state of the present invention;

fig. 11 is a schematic view of the unclamped state of the present invention.

In the figure, 1 pen tube, 2 pen points, 3 pen points, 4 pen clamps, 5 pen point tubes, 6 connectors, 7 sliding plates, 8 pressing strips, 9 permanent magnetic blocks, 10 pressing blocks, 11 sliding columns, 12 permanent magnetic sliding blocks, 13 springs, 14 fixing rings, 15 connecting blocks, 16 fixing blocks, 17 rotating blocks, 18 air vents, 19 annular sliding grooves, 20T-shaped sliding blocks, 21 strip-shaped grooves and 22 salient point blocks.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Examples

As shown in fig. 1-11, a pen holder comprises a pen barrel 1, a pen point 2 is connected to the lower end of the pen barrel 1 in a threaded manner, an external threaded tube is fixedly connected to the upper end of the pen point 2, and an internal thread is arranged on the inner side wall of the lower end of the pen barrel 1, so that the pen barrel 1 and the pen point 2 are connected in a threaded manner, a user can conveniently unscrew and replace a pen core by himself, a pen point 3 is fixedly connected to the upper end of the pen barrel 1, a pen clip 4 is arranged on the side wall of the pen point 3, the pen point 3 comprises a pen point tube 5, the diameters of the pen barrel 1 and the pen point tube 5 are the same, a driving mechanism is arranged in the pen point tube 5, the lower end of the pen point tube 5 is rotatably connected to the upper end of the pen barrel 1 through a connector 6, it is worth mentioning that the lower end of the pen point tube 5 is;

the pen clip 4 comprises a sliding plate 7 and a pressing strip 8 fixedly connected to the side wall of the sliding plate 7, specifically, one end face of the sliding plate 7 is a plane, the other end face is an arc face, the arc end face of the sliding plate 7 is flush with the outer side wall of the pen point tube 5, the sliding plate 7 is slidably connected with the upper end of the pen point tube 5, the sliding plate 7 can slide along the plane-arc face direction, a permanent magnet block 9 capable of being driven by a driving mechanism is arranged on the side wall of the pressing strip 8, a slot is arranged on the side wall of the pressing strip 8 close to the pen point tube 5, the permanent magnet block 9 is embedded in the slot, fixed installation can be realized between the permanent magnet block 9 and the slot through interference fit, each face of the permanent magnet block 9 is flush with the surface of the pressing strip 8, not only is the smoothness of the surface of the pressing strip 8 improved, the hand cutting situation is avoided, the bead 8 and the press block 10 may be integrally formed by an injection molding process.

Actuating mechanism includes slip post 11, slip post 11 external fixation has cup jointed permanent magnetism slider 12, the magnetic induction line of permanent magnetism slider 12 is along the axis direction of slip post 11, permanent magnetism slider 12's lower half and permanent magnetism piece 9 heteropolar attract, permanent magnetism slider 12's first half and permanent magnetism piece 9 homopolar repulsion, the lower extreme fixedly connected with spring 13 of slip post 11, be equipped with the spout on the lower part lateral wall of nib pipe 5, permanent magnetism slider 12 freely slides in the spout, when permanent magnetism slider 12 slides to the deepest of spout, permanent magnetism slider 12's lower half is corresponding with permanent magnetism piece 9's position, and the lower extreme parallel and level of spring 13 and nib pipe 5 this moment.

The connector 6 comprises a fixing ring 14, a connecting block 15, a fixing block 16 and a rotating block 17, the fixing ring 14, the connecting block 15, the fixing block 16 and the rotating block 17 are coaxially and fixedly connected, wherein the outer diameter of the fixing ring 14 is the same as the diameter of the sliding groove, the diameter of the connecting block 15 is the same as the diameter of the pen tube 1 and the diameter of the pen head tube 5, the sliding column 11, the connecting block 15, air holes 18 are formed in the fixing block 16 and the rotating block 17, air holes 18 are formed in the sliding column 11, the lower end opening of the air holes is formed in the lower end face of the sliding column 11, the upper end opening of the air holes is formed in the peripheral side wall of the upper portion of the sliding column 11 (shown in figure 5), and therefore the situation that the pen core.

An annular sliding groove 19 is formed in the inner side wall of the upper portion of the pen tube 1, the annular sliding groove 19 is matched with the rotating block 17, the distance from the annular sliding groove 19 to the opening of the upper end of the pen tube 1 is the same as the thickness of the fixed block 16, the diameter of the fixed block 16 is smaller than the inner diameter of the pen tube 1, and the diameter of the rotating block 17 is between the inner diameter of the pen tube 1 and the diameter of the annular sliding groove 19, so that the rotating block 17 can freely rotate in the annular sliding groove 19.

The side wall of the sliding plate 7 is fixedly connected with a T-shaped sliding block 20, the upper end face of the pen point tube 5 is provided with a T-shaped sliding groove matched with the T-shaped sliding block 20, the upper end of the T-shaped sliding groove penetrates through the side wall of the pen point tube 5, the sliding plate 7 is provided with a strip-shaped open slot 21, the opening direction of the strip-shaped open slot 21 is parallel to the movement direction of the pressing strip 8, specifically, the pressing strip 8 moves along the plane-cambered surface direction of the sliding plate 7, and the width of the strip-shaped open slot 21 is larger than the diameter of.

The lateral wall that layering 8 was kept away from to briquetting 10 is the arc corresponding with barrel 1 lateral wall, and is equipped with a department and the corresponding bump piece 22 in briquetting 10 position on the lateral wall of barrel 1, and this bump piece 22 is the array by a plurality of bumps and arranges, and the accessible polisher is polished and is formed.

In the clamping state of the invention, the spring 13 is in the original long state, and the different poles of the permanent magnet slide block 12 and the permanent magnet block 9 are attracted, so that the pressing strip 8 is attached to the pen tube 1, and the pressing block 10 is abutted against the side wall of the pen tube 1 (as shown in figure 10).

When the pen clip 4 and the pen holder are required to be separated, the sliding column 11 is pressed downwards, the sliding column 11 drives the permanent magnet slide block 12 to move downwards and simultaneously compresses the spring 13, and when the upper half part of the permanent magnet slide block 12 moves to the position corresponding to the permanent magnet block 9, the permanent magnet block 9 moves in the direction away from the pen head tube 5 under the repulsion force from the permanent magnet slide block 12 due to the principle that like poles repel each other, so that the pen clip 4 is separated from the pen holder (as shown in fig. 11).

According to the pen holder, after the pressing strip 8 is inserted into a to-be-fixed object such as a bag edge or a cover, the sliding column 11 is loosened, the sliding column 11 and the permanent magnet slider 12 are pushed to reset under the action of the spring 13, the pressing strip 8 is made to approach the pen tube 1 under the action of the permanent magnet slider 12, and the pen holder is clamped and fixed.

Compared with the traditional pen clip clamped by self elasticity, the pen clip provided by the invention is simpler to operate, is not easy to damage and has a better fixing effect.

It is worth mentioning, according to the difference of user demand, can adjust the position of layering 8 according to the in service behavior, when the student used, mostly with the pen-holder centre gripping on books, at this moment, can rotate layering 8 to the position of non-bump piece 22, make the lateral wall of pen tube 1 and briquetting 10 be the planomum, according to the computational formula of pressure: p is F/S, so that the damage of the pen holder to the book paper can be reduced; when a doctor or an engineer uses the pen holder, most of the pen holder is clamped on a jacket pocket, the pressing strip 8 can be rotated to the position of the convex point block 22, so that the side wall of the pen tube 1 opposite to the pressing block 10 is in a convex point shape, the clamping pressure of the pen holder is increased, the friction force between the pen holder and clothes is increased, the clamping effect is improved, and the situation that the pen holder falls off from the pocket is reduced.

In addition, because the permanent magnetic slide block 12 is arranged in the pen holder, the pen holder can be adsorbed on objects made of ferromagnetic materials, such as an automobile shell, a tripod and the like, by utilizing the magnetic force of the permanent magnetic slide block 12, and the practicability is further improved.

A manufacturing method of a penholder comprises the following steps:

s1, firstly, the upper end of the pen point 2 is connected with the lower end of the pen tube 1 in a threaded manner, and the step can be finished in the last step;

s2, inserting the T-shaped slide block 20 on the slide plate 7 along the T-shaped sliding groove on the pen point tube 5, and inserting the T-shaped slide block 20 to the bottommost part of the T-shaped sliding groove, namely, the cambered surface of the slide plate 7 is flush with the outer side wall of the pen point tube 5;

s3, inserting the upper end of the sliding column 11 from the lower end of the nib tube 5, penetrating the sliding column along the strip-shaped slot of the sliding plate 7, and limiting the position of the sliding plate 7 by using the sliding column 11 to prevent the sliding plate 7 from sliding out of the T-shaped sliding slot, so that the tail end of the spring 13 is flush with the lower end of the nib tube 5;

s4, cooling the connector 6 for 8-10 minutes under the conditions of normal pressure and-70 ℃ by using an air turbine refrigerator, reducing the volume of the connector 6 according to the principle of thermal expansion and cold contraction, and inserting the upper end and the lower end of the connector 6 into the lower end of the pen point tube 5 and the upper end of the pen tube 1 respectively to enable the upper side wall and the lower side wall of the connecting block 15 to be attached to the side walls of the pen point tube 5 and the pen tube 1 respectively;

and S5, finally, heating the whole penholder for 10-15 minutes under the conditions of normal pressure and 20 ℃ to restore the temperature of the connector 6 to normal temperature, enabling the fixed ring 14 to be tightly abutted against the side wall of the chute, enabling the rotating block 17 to be located in the annular chute 19 and to freely rotate in the annular chute 19, and completing the assembly of the penholder.

In the assembly process, the sliding column 11 is skillfully utilized to limit the sliding plate 7, so that the use of chemical adhesives can be reduced, the structural connection between parts is tighter and firmer, the use safety can be improved, and the service life can be prolonged; according to the invention, the assembly is carried out by a cold-contraction method, only the connector 6 needs to be frozen in the installation process, so that not only is the energy consumption greatly reduced, but also the damage to the whole pen holder in the assembly process can be reduced, and the damage rate of the pen holder in the assembly process is reduced.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (5)

1. A pen holder comprises a pen tube (1), wherein a pen point (2) is connected to the lower end of the pen tube (1) in a threaded manner, a pen point (3) is fixedly connected to the upper end of the pen tube (1), and a pen clip (4) is arranged on the side wall of the pen point (3), and is characterized in that the pen point (3) comprises a pen point tube (5), a driving mechanism is arranged in the pen point tube (5), and the lower end of the pen point tube (5) is rotatably connected with the upper end of the pen tube (1) through a connector (6);

the pen clip (4) comprises a sliding plate (7) and a pressing strip (8) fixedly connected to the side wall of the sliding plate (7), the sliding plate (7) is in sliding connection with the upper end of the pen point tube (5), a permanent magnet block (9) capable of being driven by a driving mechanism is arranged on the side wall of the pressing strip (8), and a pressing block (10) is fixedly connected to the side wall of the pressing strip (8);

the driving mechanism comprises a sliding column (11), a permanent magnet sliding block (12) is fixedly sleeved outside the sliding column (11), magnetic induction lines of the permanent magnet sliding block (12) are along the axis direction of the sliding column (11), the lower half part of the permanent magnet sliding block (12) is attracted with the opposite poles of the permanent magnet blocks (9), a spring (13) is fixedly connected to the lower end of the sliding column (11), a sliding groove is formed in the side wall of the lower part of the pen point tube (5), and the permanent magnet sliding block (12) freely slides in the sliding groove;

connector (6) are including solid fixed ring (14), connecting block (15), fixed block (16) and turning block (17), gu fix coaxial fixed connection between solid fixed ring (14), connecting block (15), fixed block (16) and turning block (17), all be equipped with bleeder vent (18) on sliding column (11), connecting block (15), fixed block (16) and turning block (17).

2. A pen holder according to claim 1, characterized in that the upper inner side wall of the pen tube (1) is provided with an annular sliding groove (19), and the annular sliding groove (19) is matched with the rotating block (17).

3. The penholder according to claim 2, characterized in that a T-shaped sliding block (20) is fixedly connected to the side wall of the sliding plate (7), a T-shaped sliding groove matched with the T-shaped sliding block (20) is formed in the upper end face of the pen head tube (5), the upper end of the T-shaped sliding groove penetrates through the side wall of the pen head tube (5), a strip-shaped open groove (21) is formed in the sliding plate (7), the opening direction of the strip-shaped open groove (21) is parallel to the movement direction of the pressing strip (8), and the width of the strip-shaped open groove (21) is larger than the diameter of the sliding column (11).

4. A penholder according to claim 3, characterized in that the side wall of the pressing block (10) far away from the pressing strip (8) is in an arc shape corresponding to the side wall of the pen tube (1), and the side wall of the pen tube (1) is provided with a protruding point block (22) corresponding to the position of the pressing block (10).

5. A method for manufacturing a pen holder according to claim 1, comprising the steps of:

s1, firstly, connecting the upper end of the pen point (2) to the lower end of the pen tube (1) through threads;

s2, inserting the T-shaped sliding block (20) on the sliding plate (7) along the T-shaped sliding groove on the pen point tube (5), and inserting the T-shaped sliding block (20) to the bottommost part of the T-shaped sliding groove;

the pen clip (4) comprises a sliding plate (7) and a pressing strip (8) fixedly connected to the side wall of the sliding plate (7), one end face of the sliding plate (7) is a plane, the other end face of the sliding plate is an arc face, the arc end face of the sliding plate (7) is flush with the outer side wall of the pen head tube (5), the sliding plate (7) is in sliding connection with the upper end of the pen head tube (5), and the sliding plate (7) can slide along the plane-arc face direction;

s3, inserting the upper end of the sliding column (11) from the lower end of the pen point tube (5) and penetrating out along the strip-shaped slot (21) of the sliding plate (7) to enable the tail end of the spring (13) to be flush with the lower end of the pen point tube (5);

in the clamping state, the spring (13) is in the original long state, the heteropolar attraction of the permanent magnet sliding block (12) and the permanent magnet block (9) enables the pressing strip (8) to be attached to the pen tube (1), and the pressing block (10) is abutted to the side wall of the pen tube (1);

when the pen clip (4) is separated from the pen holder, the sliding column (11) is pressed downwards, the sliding column (11) drives the permanent magnet sliding block (12) to move downwards and simultaneously compresses the spring (13), and when the upper half part of the permanent magnet sliding block (12) moves to the position corresponding to the permanent magnet block (9), the permanent magnet block (9) moves in the direction away from the pen head tube (5) under the action of the repulsive force from the permanent magnet sliding block (12), so that the pen clip (4) is separated from the pen holder;

after the pressing strip (8) is inserted into a to-be-fixed object, the sliding column (11) is loosened, the sliding column (11) and the permanent magnet sliding block (12) are pushed to reset under the action of the spring (13), and the pressing strip (8) is made to approach the pen tube (1) under the action of the permanent magnet sliding block (12) to finish clamping and fixing the pen holder;

s4, cooling the connector (6) for 8-10 minutes by using an air turbine refrigerator under the conditions of normal pressure and-70 ℃, and then respectively inserting the upper end and the lower end of the connector (6) into the lower end of the pen point pipe (5) and the upper end of the pen pipe (1) to enable the upper side wall and the lower side wall of the connecting block (15) to be respectively attached to the side walls of the pen point pipe (5) and the pen pipe (1);

the connector (6) comprises a fixing ring (14), a connecting block (15), a fixing block (16) and a rotating block (17), the fixing ring (14), the connecting block (15), the fixing block (16) and the rotating block (17) are coaxially and fixedly connected, air holes (18) are formed in the sliding column (11), the connecting block (15), the fixing block (16) and the rotating block (17), air holes (18) are formed in the sliding column (11), the lower end opening of the air holes is formed in the lower end face of the sliding column (11), and the upper end opening of the air holes is formed in the peripheral side wall of the upper portion of the sliding column (11);

and S5, finally, heating the whole penholder for 10-15 minutes under the conditions of normal pressure and 20 ℃ to finish the assembly of the penholder.

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