CN212446852U

CN212446852U - Propelling pencil

Info

Publication number: CN212446852U
Application number: CN202021878832.0U
Authority: CN
Inventors: 韩爱国
Original assignee: Tianjiao Pen Industrial Co ltd
Current assignee: Tianjiao Pen Industrial Co ltd
Priority date: 2020-09-01
Filing date: 2020-09-01
Publication date: 2021-02-02
Anticipated expiration: 2030-09-01

Abstract

The utility model discloses an automatic pencil, including the pen-holder, the pen-holder is provided with by writing pressure drive along pen-holder axial motion's refill centre gripping subassembly, by refill centre gripping subassembly's axial motion drive pivoted rotor, the rotor can drive refill centre gripping subassembly when rotating and rotate, the rotor is located refill centre gripping subassembly one side position, and the rotation axis of rotor and the axis of rotation of refill centre gripping subassembly are mutually perpendicular, and refill centre gripping subassembly can drive the rotor when axial motion and follow pen-holder axial motion, and the rotor is provided with in at least one direction of pen-holder axial motion and can drive its pivoted conflict part when inconsistent with the rotor. The utility model provides a can be based on writing pressure drive refill pivoted propelling pencil.

Description

Propelling pencil

Technical Field

The utility model relates to a pen, especially a propelling pencil.

Background

The lead of the propelling pencil is slightly inclined with the paper surface when the propelling pencil is used for writing, so that one side of the end part of the lead can be continuously abraded, the contact surface of the lead and the paper surface is gradually increased, lines are continuously thickened and lightened when the propelling pencil is used for writing, and the writing effect is poor.

There is a mechanical pencil which uses writing pressure to rotate the lead, such as a mechanical pencil (CN 200780020831.3) which is a utility model applied by mitsubishi corporation in china, and it is disclosed that the mechanical pencil comprises a shaft, a clamping member disposed in the shaft for releasing and clamping the lead, and a rotary driving mechanism, wherein the rotary driving mechanism comprises a rotary body, the rotary body and the clamping member are coaxially and rotatably disposed in the shaft, the rotary body is driven to axially move based on the retreating action of the lead and the clamping member during writing pressure, the two axial sides of the rotary body are provided with matching parts, the rotary body can be driven to rotate by the interference matching of the rotary body and the matching parts, and the rotary movement of the rotary body drives the clamping member and the lead to integrally rotate, so that the end of the lead is not maintained in a worn state, and the thickness and the shade of the written lines can be relatively kept uniform on the same side, thereby improving the writing effect.

SUMMERY OF THE UTILITY MODEL

To the not enough of above-mentioned prior art, the utility model provides a can be based on writing pressure drive refill pivoted propelling pencil.

In order to achieve the above object, the utility model provides an automatic pencil, including the pen-holder, the pen-holder is provided with by writing pressure drive along pen-holder axial motion's refill centre gripping subassembly, by refill centre gripping subassembly's axial motion drive pivoted rotor, the rotor can drive refill centre gripping subassembly when rotating and rotate, the rotor is located refill centre gripping subassembly one side position, and the rotation axis center of rotor and refill centre gripping subassembly's rotation axis are mutually perpendicular, and refill centre gripping subassembly can drive the rotor along pen-holder axial motion when axial motion, and the rotor is provided with on at least one direction along pen-holder axial motion and can drive its pivoted conflict part when inconsistent with the rotor.

The utility model has the advantages that: set up the rotor in one side position of refill centre gripping subassembly, and the axis of rotation that makes the rotor and refill centre gripping subassembly is mutually perpendicular, rely on and write pressure as drive power, make refill centre gripping subassembly can follow pen-holder axial motion, and then can drive the rotor along pen-holder axial motion, can drive the rotor when the rotor is followed pen-holder axial motion and is inconsistent with conflict part and produce the rotation, the rotor redrives refill centre gripping subassembly when rotating and rotates, thereby the refill that realizes propelling pencil can be constantly rotated at the in-process of writing, reduce the loss to refill tip with one side, improve writing effect.

Furthermore, the penholder is provided with a sleeve part which is driven by the axial movement of the refill clamping assembly to move along the axial direction of the penholder, the sleeve part is sleeved between the penholder and the refill clamping assembly, the sleeve part and the penholder form circumferential limit matching, and the rotating body is rotatably arranged on one side of the sleeve part.

The effect of adopting above-mentioned setting is: the sleeve assembly is used for bearing the rotating body, so that the rotating body and the cartridge clamping assembly can be kept at a relatively fixed position relative to the penholder and cannot rotate along the axial direction of the penholder when the rotating body and the cartridge clamping assembly are in driving fit.

Furthermore, the penholder comprises a cavity which can contain the rotating body and provide the rotating body with a motion space along the axial direction of the penholder, a collision component is arranged on at least one side of the cavity corresponding to the axial direction of the penholder, and a first annular tooth which can drive the rotating body to rotate in a single direction when colliding with the collision component is arranged on the rotating body.

The effect of adopting above-mentioned setting is: the chamber can be used for accommodating the rotating body and providing a movement space for the rotating body, so that the rotating body can work relatively independently and is not easy to interfere with other interiors of the pen, and the chamber can be matched with the rotating body to limit the sleeve assembly in the axial direction and the circumferential direction; the first ring tooth of the rotating body can drive the rod rotating body to rotate when being abutted against the abutting part.

Furthermore, a first elastic part capable of driving the refill clamping assembly to move and reset towards the head direction of the pen rod is arranged between the pen rod and the sleeve part and/or between the pen rod and the refill clamping assembly, and the two sides of the cavity, which correspond to the axial direction of the pen rod, are provided with the collision parts.

The effect of adopting above-mentioned setting is: through the indirect or direct drive refill centre gripping subassembly of first elastic component drive towards the motion of pen-holder head direction and reset, make refill centre gripping subassembly, sleeve part and rotor constantly can follow pen-holder axial seesaw writing the in-process, the rotor can correspond the conflict part conflict cooperation of pen-holder axial both sides with the cavity respectively when the front and back motion to can improve the rotation efficiency of refill.

Furthermore, a bearing/shaft sleeve is arranged at the position of the limiting fit of the sleeve part and the refill clamping assembly, and a cavity for accommodating the bearing/shaft sleeve is formed between the sleeve part and the refill clamping assembly.

The effect of adopting above-mentioned setting is: the arrangement of the shaft sleeve/shaft sleeve can be used for axial limiting matching of the sleeve part and the refill clamping assembly, the rotating matching effect of the sleeve part and the refill clamping assembly can be improved, and abrasion of a matching part is reduced.

Furthermore, the bearing comprises a first ferrule member, a second ferrule member and a third ferrule member which are respectively arranged at two axial ends of the first ferrule member in a rotatable fit manner, the first ferrule member and the pen core clamping assembly form a positioning fit, and the second ferrule member and the third ferrule member form a circumferential limit fit with the sleeve member.

The effect of adopting above-mentioned setting is: the bearing adopting the structure can be used for bearing the acting force generated when the sleeve part and the pen core clamping assembly are axially matched, and the rotating friction force between the sleeve part and the pen core clamping assembly can be reduced through the rotating matching among the first sleeve ring part, the second sleeve ring part and the third sleeve ring part, so that the abrasion is reduced, and the service life is prolonged.

Further, a second elastic element which enables the first ferrule element and the second ferrule element and/or the first ferrule element and the third ferrule element to be in tight fit with each other in a compression mode is arranged in the cavity.

The effect of adopting above-mentioned setting is: the setting of second elastic component can improve the contact effect between first ferrule spare, second ferrule spare, the third ferrule spare, and then improves the result of use of bearing.

Furthermore, the rear end of the sleeve part is provided with an installation opening for installing a bearing and a second elastic part, the inner side of the sleeve part is provided with a limiting part, two axial ends of the second elastic part are respectively abutted between the limiting part and the second ferrule part, the second ferrule part is provided with an axially extending sliding groove, the inner side of the sleeve part is provided with a sliding block matched with the sliding groove and axially sliding, and the third ferrule part is inserted and positioned at the rear end of the sleeve part.

The effect of adopting above-mentioned setting is: the bearing and the second elastic element can be conveniently loaded into the inner side of the sleeve part through the loading opening, and the other parts of the bearing and the second elastic element can be prevented from being separated from the loading opening when the third ring part of the bearing is inserted and positioned at the rear end of the sleeve part.

Furthermore, raceways are arranged on the matching surfaces between the first and second ferrule pieces and the matching surfaces between the first and third ferrule pieces, balls are arranged in the raceways, and retainers which are installed in a matching manner with the balls are arranged between the first and second ferrule pieces and between the first and third ferrule pieces.

The effect of adopting above-mentioned setting is: the balls are installed through the retainer to keep the distance between the balls, the roller paths are arranged on the first ferrule piece, the second ferrule piece and the third ferrule piece, and the second elastic piece can realize compression, so that the rolling effect of the balls can be improved.

Further, the refill centre gripping subassembly is including section of thick bamboo portion and the lantern ring of cartridge location in section of thick bamboo portion rear end, and section of thick bamboo portion rear end is provided with the slot, the inboard of first lantern ring spare be provided with the lug of slot cooperation cartridge, be provided with on the lantern ring and carry out the confined dog to the entry of slot.

The effect of adopting above-mentioned setting is: the protruding block of first ferrule spare seals the entry of slot through the dog of the lantern ring after inserting along the slot, can be in the same place first ferrule spare and refill centre gripping subassembly location cooperation, and simple structure can improve the assembly effect.

Furthermore, a second annular tooth is arranged on the pen core clamping assembly, a third annular tooth meshed with the second annular tooth is arranged on the rotating body, and a rotating body mounting seat capable of enabling the rotating body to be connected in a rotating mode and a first opening capable of enabling the third annular tooth to extend into the inner side of the sleeve part are arranged on one side of the sleeve part.

The effect of adopting above-mentioned setting is: the third ring tooth of rotor stretches into the sleeve part inboard through first opening and meshes mutually with the second ring tooth of refill centre gripping subassembly, makes the rotor can drive relative sleeve part of refill centre gripping subassembly and pen-holder rotation when the pivoted, and transmission simple structure, convenient processing.

Furthermore, the first opening is arranged at one side position of the rotating body mounting seat along the axial direction of the sleeve part, and a second opening through which the third ring teeth can extend into the inner side of the sleeve part is further arranged at the other side position of the rotating body mounting seat along the axial direction of the sleeve part.

The effect of adopting above-mentioned setting is: the second opening enables the third ring teeth of the rotating body not to interfere with the sleeve part when rotating, so that the rotating effect is improved, the connection between the pen core clamping assembly and the rotating body can be more attached, and the structure is more compact.

Furthermore, the rotor mount pad is including boss and the jack-post of setting on the boss, be provided with the card hole of intercommunication sleeve part inside and outside on the boss, be provided with on the jack-post with the joint of card hole cooperation joint location, the rotor including with the jack-post rotates to cup joint the complex shaft hole.

The effect of adopting above-mentioned setting is: the setting of the axle post can increase the axial length of its normal running fit department of rotor, improves the stability when rotating to axle post and sleeve part adopt the joint mode to connect, conveniently insert the sleeve part pen-holder inboard, make the pen-holder can do more thinly, reduce the size of pen.

Further, a mounting hole used for assembling the rotating body in the cavity is formed in one side of the pen holder, a cover plate is mounted at the mounting hole, and the abutting part is arranged on the cover plate.

The effect of adopting above-mentioned setting is: the mounting opening is formed in one side of the pen holder, and the abutting part is arranged on the cover plate, so that the assembly of the rotating body is facilitated. The cover plate can be made of transparent materials, so that a user can visually observe the rotation condition of the rotating body, and the interestingness is improved.

Drawings

FIG. 1 is a block diagram of an embodiment of the present invention;

FIG. 2 is an assembly view of a cover plate according to an embodiment of the present invention;

fig. 3 is a partial cross-sectional view 1 of an embodiment of the invention;

fig. 4 is a partial cross-sectional view 2 of an embodiment of the invention;

fig. 5 is a partial cross-sectional view 3 of an embodiment of the invention;

FIG. 6 is an assembly view of the sleeve member and the rotor according to the embodiment of the present invention;

FIG. 7 is a back view of a rotor according to an embodiment of the present invention;

fig. 8 is a front view of a rotor according to an embodiment of the present invention;

FIG. 9 is a block diagram of a second ferrule member according to an embodiment of the invention, FIG. 1;

FIG. 10 is a block diagram of a second ferrule member according to an embodiment of the invention, FIG. 2;

FIG. 11 is a block diagram of a first ferrule assembly according to an embodiment of the present invention;

FIG. 12 is a block diagram of a third ferrule assembly according to an embodiment of the invention;

fig. 13 is a structural view of a cover plate according to an embodiment of the present invention;

FIG. 14 is an assembly view of the barrel portion and collar of an embodiment of the present invention;

fig. 15 is a view showing the combination of the rotating body and the cover plate according to the embodiment of the present invention.

Detailed Description

The embodiment of the propelling pencil of the utility model is shown in figures 1-15: including pen-holder 1, pen-holder 1 is provided with by writing pressure drive along pen-holder 1 axial motion's refill centre gripping subassembly 2, by refill centre gripping subassembly 2's axial motion drive pivoted rotor 3, rotor 3 can drive refill centre gripping subassembly 2 when rotating and rotate, refill centre gripping subassembly 2 can form the centre gripping to the refill and remove in order to order about the refill to stretch out, and pen-holder 1 rear end is including locating sleeve 9, and cartridge centre gripping subassembly 2 rear end cartridge location has a cap 5 of pressing, but refill centre gripping subassembly 2 axial motion sets up at pen-holder 1 inboard, rotor 3 is located refill centre gripping subassembly 2 one side position, and the rotation axis of rotor 3 is mutually perpendicular with the axis of rotation of refill centre gripping subassembly 2, and refill centre gripping subassembly 2 can drive 3 when axial motion along pen-holder 1 axial motion rotor 3 is provided with on at least one direction of rotor 1 axial motion can drive its pivoted conflict part 4 when inconsistent with rotor 3.

The pen holder 1 is provided with a sleeve part 6 which is driven by the axial movement of the pen core clamping component 2 to move along the axial direction of the pen holder 1, an axial limiting matching relation exists between the pen core clamping component 2 and the sleeve part 6, the sleeve part 6 is sleeved between the pen holder 1 and the pen core clamping component 2, the sleeve part 6 is sleeved outside the pen core clamping component 2 and can rotate relative to the pen core clamping component 2, the sleeve part 6 and the pen holder 1 form circumferential limiting matching, and the rotating body 3 is rotationally arranged on one side of the sleeve part 6.

The penholder 1 comprises a cavity 11 which can contain the rotating body 3 and provide the moving space along the axial direction of the penholder 1 for the rotating body, the two axial sides of the cavity 11 corresponding to the penholder 1 are provided with the collision component 4, of course, only one side of the cavity can be provided with the collision component 4, the rotating body 3 is provided with a first annular tooth 31 which can drive the rotating body 3 to rotate in one direction when colliding with the collision component 4, the first annular tooth 31 is in a ratchet shape, the first annular tooth 31 is arranged on the outer peripheral surface of the rotating body 3, and the first annular tooth 31 drives the rotating body 3 to rotate towards a specific direction based on the generated circumferential component force along the rotating body 3 when colliding with the collision component 4.

Because the rotating body 3 is rotatably arranged at one side of the sleeve part 6, the sleeve part 6 and the penholder 1 can form circumferential limit fit through the limit fit between the rotating body 3 in the cavity 11 and the inner wall of the cavity 11.

The utility model discloses a writing brush, including rotor 3, installation mouth 12 in cavity 11, apron 13, conflict part 4 sets up on apron 13, apron 13 can be observed the operating condition of rotor 3 by transparent material, conveniently, improves the interest when writing 1 one side offered and is used for with rotor 3 assembles installing port 12 in the cavity 11, installing port 12 department.

A first elastic piece 71 capable of driving the sleeve part 6 to move and reset towards the head direction of the pen holder 1 is arranged between the pen holder 1 and the sleeve part 6, the cartridge clamping assembly 2 can be driven to move and reset towards the head direction of the pen holder 1 based on the axial limiting matching of the sleeve part 6 and the cartridge clamping assembly 2, and the first elastic piece 71 is abutted to the sleeve part 6 and the locating sleeve 9 respectively. Of course, in other examples, the first elastic member 71 may be disposed between the barrel 1 and the cartridge holder assembly 2, and may also serve to drive the cartridge holder assembly 2 to move toward the head of the barrel 1 for resetting.

Because the chamber 11 corresponds the axial both sides of pen-holder 1 and all is provided with conflict part 4, under the mutually supporting effect of writing pressure and first elastic component 71 elastic force, make the first ring tooth 31 of rotor 3 constantly cooperate with conflict part 4 of chamber 11 both sides in turn, can improve the slew velocity of rotor 3 and the smoothness nature when rotating.

The limiting matching position of the sleeve part 6 and the refill clamping component 2 is provided with a bearing 8, on one hand, the arrangement of the bearing 8 can reduce the friction force between the sleeve part 6 and the refill clamping component 2 and improve the rotating effect of the refill clamping component 2, and a cavity 60 for accommodating the bearing 8 is formed between the sleeve part 6 and the refill clamping component 2. In other examples, bushings may also be used to facilitate machining, reduce cost, and improve assembly efficiency.

The bearing 8 comprises a first collar member 81, a second collar member 82 and a third collar member 83 which are respectively arranged at two axial ends of the first collar member 81 in a rotatable fit mode, the first collar member 81 and the pen core clamping assembly 2 form a positioning fit, the second collar member 82 and the third collar member 83 form a circumferential limit fit with the sleeve member 6, and the circumferential limit fit comprises the condition that the second collar member 82 and the sleeve member 6 and/or the third collar member 83 and the sleeve member 6 can axially move and also comprises the condition that the second collar member 82 and the sleeve member 6 and/or the third collar member 83 and the sleeve member 6 are fixed in position.

In this embodiment, the third collar member 83 is inserted and positioned at the rear end of the sleeve member 6 to keep the positions of the two members relatively fixed, the second collar member 82 and the sleeve member 6 are circumferentially limited but axially relatively slidable, and the cavity 60 is provided with the second elastic member 72 for press-fitting the second collar member 82 onto the first collar member 81. In other examples, if both the second collar member 82 and the third collar member 83 are axially slidable relative to the sleeve member 6, the second resilient members 72 may be provided in two, with the other second resilient member 72 being used to press-fit the third collar member 83 onto the first collar member 81.

The rear end of the sleeve part 6 is provided with an installing opening 61 for installing the bearing 8 and the second elastic part 72, the inner side of the sleeve part 6 is provided with a limit part 62, the two axial ends of the second elastic part 72 are respectively abutted between the limit part 62 and the second ferrule part 82, the second ferrule part 82 is provided with a slide groove 821 extending axially, the inner side of the sleeve part 6 is provided with a slide block 63 matching with the slide groove 821 and sliding axially, the axial movement and circumferential limit matching of the second ferrule part 82 and the sleeve part 6 can be realized through the matching of the slide block 63 and the slide groove 821, the second elastic part 72, the second ferrule part 82, the first ferrule part 81 and the third ferrule part 83 can be sequentially installed into the inner side of the sleeve part 61 along the installing opening 61, the installing process is convenient, and the parts can be kept in the inner side of the sleeve part 61 due to the positioning matching between the third ferrule part 83 and the sleeve part 6, and is prevented from coming out of the mounting port 61.

The raceway 80 is arranged on the matching surface between the first ferrule piece 81 and the second ferrule piece 82 and the matching surface between the first ferrule piece 81 and the third ferrule piece 83, the ball 84 is arranged in the raceway 80, the retainer 85 which is matched with the ball 84 is arranged between the first ferrule piece 81 and the second ferrule piece 82 and between the first ferrule piece 81 and the third ferrule piece 83, the distance between the adjacent balls 84 can be kept by the retainer 85, the stress of the ball 84 is more uniform, the ball 84 can be always kept in the raceway 80 of the two adjacent ferrule pieces through the compression fit of the second elastic piece 72, and the rolling effect is improved. Of course, in other examples, the first collar member 81, the second collar member 82, and the third collar member 83 may be directly engaged with each other by sliding contact.

The pen core clamping assembly 2 comprises a barrel part 21 and a collar 22 inserted and positioned at the rear end of the barrel part 21, wherein the rear end of the barrel part 21 is provided with a slot 211, the inner side of a first collar part 81 is provided with a lug 811 matched and inserted with the slot 211, the collar 22 is provided with a stop block 221 capable of closing the inlet of the slot 211, the lug 811 of the first collar part 81 is inserted along the inlet of the slot 211, when the collar 22 is inserted and positioned at the rear end of the barrel part 21, the stop block 221 can limit the lug 811, the first collar part 81 is prevented from being separated, and the positioning effect between the first collar part 81 and the pen core clamping assembly 2 is improved.

The refill clamping component 2 is provided with a second annular tooth 23, the axes of the second annular tooth 23, the refill clamping component 2 and the sleeve component 6 are kept consistent, the rotating body 3 is provided with a third annular tooth 32 meshed with the second annular tooth 23, the third annular tooth 32 is arranged at one axial end of the rotating body 3, one side of the sleeve component 6 is provided with a rotating body mounting seat for the rotating body 3 to be rotatably connected and a first opening 65 for the third annular tooth 32 to extend into the inner side of the sleeve component 6, and the second annular tooth 23 is arranged corresponding to the first opening 65.

The first opening 65 is arranged at one side position of the rotating body mounting seat along the axial direction of the sleeve part 6, the other side position of the rotating body mounting seat along the axial direction of the sleeve part 6 is also provided with a second opening 66 through which the third ring teeth 32 can extend into the inner side of the sleeve part 6, the second opening 66 is arranged to prevent the third ring teeth 32 from interfering with the sleeve part 6, and meanwhile, the rotating body 3 and the sleeve part 6 are attached more tightly, so that the whole structure is more compact, and the volume of the mechanical pencil is favorably reduced.

The rotor mounting seat comprises a boss 641 and a shaft post 642 arranged on the boss 641, the shaft post 642 is sleeved on the boss 641, a clamping hole 6411 communicating the inner side and the outer side of the sleeve part 6 is formed in the boss 641, a clamping joint 6421 matched with the clamping hole 6411 in clamping and positioning is arranged on the shaft post 642, the rotor 3 comprises a shaft hole 33 in matched and sleeved connection with the shaft post 642 in a rotating mode, the sleeve part 6 can be conveniently inserted into the inner side of a penholder by adopting the design, the volume of a pen is reduced, and after the sleeve part 6 is inserted in place, the shaft post 642 and the boss 641 are connected through a mounting hole 12 of the penholder 1, so that the axial length of the rotating matching position between the rotor 3 and the shaft post 642 can be increased, and the stability of the rotor 3 during rotation is improved. Of course, in other examples, the boss 642 and boss 641 or the boss 642 and sleeve member 6 are integrally formed.

The utility model discloses a current refill can provide a new design based on writing pressure self-rotation propelling pencil, innovatively sets up rotor 3 in refill centre gripping subassembly 2 one side position, and be equipped with independent cavity 11 and be used for holding rotor 3, based on the reliable cooperation between a series of drive disk assembly, make the inner space of pen-holder 1 obtain abundant optimization, reduce the required precision to drive disk assembly, overall structure is simple, compact, transmission efficiency is high, the good reliability.

The above embodiment is only one of the preferred embodiments of the present invention, and the general changes and substitutions performed by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.

Claims

1. The utility model provides a propelling pencil, includes the pen-holder, the pen-holder be provided with by write pressure drive along pen-holder axial motion's refill centre gripping subassembly, by refill centre gripping subassembly's axial motion drive pivoted rotor, the rotor can drive refill centre gripping subassembly when rotating and rotate its characterized in that: the rotor is located refill centre gripping subassembly one side position, and the axis of rotation of rotor and refill centre gripping subassembly is mutually perpendicular, and refill centre gripping subassembly can drive the rotor along pen-holder axial motion when axial motion, and the rotor is provided with in at least one orientation along pen-holder axial motion and can drive its pivoted conflict part when inconsistent with the rotor.

2. The mechanical pencil of claim 1, wherein: the pen holder is provided with a sleeve part which is driven by the axial movement of the refill clamping assembly to move along the axial direction of the pen holder, the sleeve part is sleeved between the pen holder and the refill clamping assembly, the sleeve part and the pen holder form circumferential limit matching, and the rotating body is rotatably arranged on one side of the sleeve part.

3. The mechanical pencil according to claim 1 or 2, wherein: the penholder comprises a cavity which can contain the rotating body and provide the rotating body with a motion space along the axial direction of the penholder, the collision component is arranged on at least one side of the cavity corresponding to the axial direction of the penholder, and the rotating body is provided with a first annular tooth which can drive the rotating body to rotate in a single direction when colliding with the collision component.

4. The mechanical pencil of claim 3, wherein: the pen comprises a pen holder, a sleeve part, a pen core clamping component and a cavity, wherein the pen holder is arranged in the pen holder, the sleeve part is arranged in the cavity, the pen core clamping component is arranged in the cavity, the sleeve part is arranged in the cavity, the pen holder is arranged in the cavity, the sleeve part is arranged in the cavity, the pen core clamping component is arranged in the cavity, and the first elastic component is arranged between the pen holder.

5. The mechanical pencil of claim 2, wherein: and a bearing/shaft sleeve is arranged at the position of the limiting and matching part of the sleeve part and the refill clamping assembly, and a cavity for accommodating the bearing/shaft sleeve is formed between the sleeve part and the refill clamping assembly.

6. The mechanical pencil of claim 5, wherein: the bearing comprises a first ferrule piece, a second ferrule piece and a third ferrule piece, wherein the second ferrule piece and the third ferrule piece are respectively arranged at two axial ends of the first ferrule piece in a rotatable fit mode, the first ferrule piece and the pen core clamping assembly form positioning fit, and the second ferrule piece and the third ferrule piece and the sleeve piece form circumferential limit fit.

7. The mechanical pencil of claim 6, wherein: and a second elastic piece which is used for tightly matching the first ferrule piece and the second ferrule piece and/or the first ferrule piece and the third ferrule piece together in a pressing manner is arranged in the cavity.

8. The mechanical pencil of claim 7, wherein: the rear end of the sleeve part is provided with an installation opening for installing a bearing and a second elastic part, the inner side of the sleeve part is provided with a limiting part, two axial ends of the second elastic part are respectively abutted between the limiting part and the second ferrule part, the second ferrule part is provided with an axially extending sliding groove, the inner side of the sleeve part is provided with a sliding block matched with the sliding groove and axially sliding, and the third ferrule part is inserted and positioned at the rear end of the sleeve part.

9. The mechanical pencil of claim 6, wherein: and ball tracks are arranged on the matching surface between the first ferrule piece and the second ferrule piece and the matching surface between the first ferrule piece and the third ferrule piece, balls are arranged in the ball tracks, and retainers which are matched with the balls for installation are arranged between the first ferrule piece and the second ferrule piece and between the first ferrule piece and the third ferrule piece.

10. The mechanical pencil according to claim 6, 7, 8 or 9, wherein: the pen core clamping assembly comprises a barrel part and a lantern ring which is inserted and positioned at the rear end of the barrel part, a slot is formed in the rear end of the barrel part, a convex block which is matched and inserted with the slot is arranged on the inner side of the first lantern ring part, and a stop block which can seal an inlet of the slot is arranged on the lantern ring.

11. The mechanical pencil of claim 2, wherein: the pen core clamping assembly is provided with a second annular tooth, the rotating body is provided with a third annular tooth meshed with the second annular tooth, and one side of the sleeve part is provided with a rotating body mounting seat for the rotating body to be rotatably connected and a first opening for the third annular tooth to extend into the inner side of the sleeve part.

12. The mechanical pencil of claim 11, wherein: the first opening is arranged at one side position of the rotating body mounting seat along the axial direction of the sleeve part, and the other side position of the rotating body mounting seat along the axial direction of the sleeve part is also provided with a second opening through which the third ring teeth can extend into the inner side of the sleeve part.

13. The mechanical pencil according to claim 11 or 12, wherein: the rotor mount pad is including boss and the jack-post of setting on the boss, be provided with the card hole of intercommunication sleeve part inside and outside on the boss, be provided with on the jack-post with the joint of card hole cooperation joint location, the rotor including with the jack-post rotates to cup joint the complex shaft hole.

14. The mechanical pencil of claim 3, wherein: and one side of the pen holder is provided with a mounting hole for assembling the rotating body in the cavity, a cover plate is arranged at the mounting hole, and the abutting part is arranged on the cover plate.