CN219789751U - Pressing pen with ink accumulation prevention function - Google Patents

Abstract

The utility model discloses a pressing pen with an ink accumulation preventing function, which comprises a pen holder mechanism, a pen neck mechanism, a pen core with a pen point and a pressing assembly, wherein the pen core is arranged on the pen neck mechanism; the pressing assembly comprises a rotating mechanism which is connected with the pen core and is arranged to drive the pen core to rotate around the axis in response to pen-down and pen-lifting actions of a person holding the pen during writing, the pen core continuously receives reaction pressure of the writing surface during pen-down actions, the pen core loses reaction pressure of the writing surface during pen-lifting actions, the pen core repeatedly receives and loses reaction pressure of the writing surface through the pen core, and the rotating mechanism enables the pen core to repeatedly rotate around the axis for a preset angle along the same direction, so that the pen core can rotate around the axis in an indexing mode in 360 degrees. The utility model realizes 360-degree rotation of the pen core around the axis of the pressing pen through the rotating mechanism, and solves the technical problem of uneven abrasion of the pen core ball caused by the fixed and unchangeable writing orientation of the pressing pen.

Description

Pressing pen with ink accumulation prevention function

Technical Field

The utility model relates to the technical field of writing tools, in particular to a pressing pen with an ink accumulation preventing function.

Background

Compared with the conventional cap-inserted pen, the pressing pen in the current market has excellent use convenience, so that the pressing pen is more popular with the public. However, when the pressing pen with the existing structure is used for writing, the position of holding the pen body is basically fixed by the position of the pen clamp, and under the condition, the directions of the writing pressing forces applied to the ball beads in the pen point part are always the same, so that the ball beads are unevenly worn, and the ink accumulation phenomenon of the pen point part is very easy to occur. Therefore, in order to avoid ink accumulation at the pen point during writing, it is necessary to develop a pressing pen with an ink accumulation preventing function.

Disclosure of Invention

The utility model aims to provide a pressing pen with an ink accumulation prevention function, which prevents uneven wear of ball beads in a pen point part, thereby avoiding ink accumulation, realizing smooth writing and prolonging the service life.

In order to solve the technical problems, the utility model adopts the following technical scheme:

a pressing pen with an ink accumulation preventing function comprises a pen holder mechanism, a pen neck mechanism, a pen core with a pen point and a pressing assembly; the pen neck mechanism is connected with the pen holder mechanism and is used as a hand-held part of a pen holder so as to write on a writing surface, the pressing assembly is suitable for driving the pen core to extend or retract the pen neck mechanism along the axial direction of the pressing pen, the pressing assembly comprises a rotating mechanism which is connected with the pen core and is arranged to drive the pen core to rotate around the axial line in response to the pen falling and lifting actions of the pen holder during writing, the pen core continuously receives the reaction pressure of the writing surface during the pen falling action, the pen core loses the reaction pressure from the writing surface during the pen lifting action, and the pen core repeatedly receives and loses the reaction pressure of the writing surface through the pen core, so that the pen core can repeatedly rotate around the axial line for a preset angle along the same direction by the rotating mechanism, and the pen core can rotate around the axial line in an indexing mode in the 360-degree direction.

Further, the rotation mechanism comprises a pressing rod extending along the axis, and a first ratchet part and a second ratchet part which are arranged at two ends of the pressing rod in the axis direction, the pressing rod is connected with the pen refill, the first ratchet part and the second ratchet part have the same pitch and are staggered in phase, and the pitch limits a preset angle for repeatedly rotating the pen refill around the axis;

in the process of pen-down action, the pressing rod is suitable for being driven by the first ratchet part to drive the pen core to rotate around the axis for a first angle; in the process of pen lifting, the pressing rod is driven by the second ratchet part to drive the pen refill to continuously rotate by a second angle along the driving direction of the first ratchet part, and the sum of the first angle and the second angle is equal to a preset angle of repeatedly rotating the pen refill around the axis.

Further, the first ratchet part comprises a first ratchet and a spring limiting part, the first ratchet is arranged at one end of the pressing rod far away from the pen point, the spring limiting part is provided with a second ratchet which is suitable for being matched with the first ratchet, in the process of pen-down action, the first ratchet is matched with the second ratchet to drive the pressing rod and drive the pen core to rotate around the axis, and in the process of pen-up action, the first ratchet is separated from the second ratchet under the elastic action of the spring limiting part;

the second ratchet part comprises a third ratchet and a connecting part, wherein the third ratchet is arranged at one end of the pressing rod, which is close to the pen point, the connecting part is provided with a fourth ratchet which is suitable for being matched with the third ratchet, the third ratchet is separated from the fourth ratchet in the process of pen-down action, and the third ratchet is matched with the fourth ratchet under the elastic action of the spring limiting part in the process of pen-lifting action so as to drive the pressing rod and drive the pen core to continuously rotate along the driving direction of the first ratchet part.

Further, the spring limiting part comprises a buffer spring and an inner plug part, the inner plug part is arranged in the spring limiting part in a mode that the inner plug part can move in a certain range, the buffer spring is arranged in the spring limiting part, two ends of the buffer spring are respectively abutted against the spring limiting part and the inner plug part, and in the pen lifting action process, the first ratchet and the second ratchet are released through the buffer spring.

Further, the spring limiting part further comprises a limiting hole, and an elastic part matched with the limiting hole is arranged on the surface of the inner plug part, so that the inner plug part is arranged inside the spring limiting part.

Further, the pressing assembly further comprises an operating mechanism, the operating mechanism at least partially extends to the outside of the pressing pen, and the bottom of the operating mechanism is connected with a spring limiting part to push the rotating mechanism and the pen core to move in the axial direction.

Further, the connecting portion comprises a reset spring, two ends of the reset spring are respectively abutted against the connecting portion and the positioning mechanism, and in the pen lifting action process, the matching of the third ratchet and the fourth ratchet is guaranteed through the reset spring.

Further, the positioning mechanism is at least partially connected with the connecting part, and an abutting end face abutting against the return spring is formed on the surface of the positioning mechanism.

Further, the surface of the positioning mechanism is provided with a strip-shaped protruding portion, and the connecting portion of the connecting portion and the positioning mechanism is provided with an inner positioning groove suitable for being embedded into the strip-shaped protruding portion, so that the positioning mechanism limits circumferential movement of the connecting portion.

Further, the clamping part is arranged on the inner wall of the pressing rod, and the pressing rod is connected with the pen core through the clamping part so as to drive the pen core to rotate.

The utility model provides a pressing pen with an ink accumulation prevention function, which utilizes the action states of repeatedly dropping and lifting the pen by a holder according to the font structure or exhaustion during writing, realizes 360-degree rotation of a pen core around the axis of the pressing pen through a rotating mechanism, avoids uneven abrasion of a pen core ball caused by the fixed writing orientation of the pressing pen, eliminates the ink accumulation phenomenon of a pen head caused by the uneven abrasion, prolongs the service life of the pressing pen, and has wide application value. Further, the rotation of the cartridge is performed in an indexing manner, that is, the cartridge is driven to rotate at intervals, each time by a predetermined angle, and the predetermined angle can be controlled to a small extent by setting the pitch of the ratchet part of the rotation mechanism, thus not substantially affecting the writing process.

Drawings

The foregoing and other aspects of the utility model will be better understood when read in conjunction with the following drawings. It should be noted that the drawings are only examples of the claimed technical solutions.

FIG. 1 is an exploded view of a knock pen with anti-ink-build-up function according to one embodiment of the present utility model;

FIG. 2 is a cross-sectional view of a knock pen with anti-ink-build-up function according to one embodiment of the present utility model;

FIG. 3 is a schematic view of a positioning mechanism in a knock pen with anti-ink-build-up function according to one embodiment of the present utility model;

FIG. 4 is a side view of the positioning mechanism of FIG. 3;

FIG. 5 is a schematic view of a connection portion of a knock pen with anti-ink-build-up function according to an embodiment of the present utility model;

FIG. 6 is a schematic view of the connection of FIG. 5 at another angle;

FIG. 7 is a top view of the connection of FIG. 6;

FIG. 8 is a cross-sectional view of a rotation mechanism in a knock pen with anti-ink-build-up function according to one embodiment of the present utility model;

FIG. 9 is a front view of the rotary mechanism of FIG. 8;

FIG. 10 is a cross-sectional view taken along line A-A' of FIG. 9;

FIG. 11 is a schematic view of a spring retainer of a snap pen with anti-ink-accumulation function according to an embodiment of the present utility model;

FIG. 12 is a schematic view of the spring retainer of FIG. 11 at another angle;

FIG. 13 is a top view of the spring retainer of FIG. 12;

FIG. 14 is a schematic view of an inner plug portion of a knock pen with anti-ink-build-up function according to one embodiment of the present utility model;

FIG. 15 is an enlarged view of a portion of FIG. 2A;

FIG. 16 is a semi-cut view of the snap assembly in the pen-up position of the present utility model;

fig. 17 is a semi-cut view of the snap assembly in the pen down state of the present utility model.

Wherein reference numerals are as follows:

a penholder mechanism: 1

Pen neck mechanism: 2

Pen clip: 3

Positioning mechanism: 4

Elastic boss: 41

Strip-shaped protruding portions: 42

Abutment end face: 43

And (3) a pressing rod: 5

Clamping part: 51

A first ratchet: 52

Third ratchet: 53

Hook portion: 54

Spring limit part: 6

A second ratchet: 61

Outer positioning groove: 62

Limiting hole: 63

Buffer spring: 64

Inner plug part: 65

Elastic part: 651

Circumferential positioning part: 652

Rotating wheel: 71

Guide rail: 711

And (3) pressing head: 72

And (3) a telescopic spring: 73

A connecting part: 8

And (3) through holes: 81

Inner positioning groove: 82

Fourth ratchet: 83

And (3) a return spring: 84

Refill: 9

The pen point comprises: 91

Detailed Description

The detailed features and advantages of the present utility model will be readily apparent to those skilled in the art from the following detailed description, claims, and drawings that follow.

It should be noted that in this specification, like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present embodiment, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top", "bottom", etc. are based on the azimuth or positional relationship shown in the drawings, or the azimuth or positional relationship in which the product is conventionally put when used, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific azimuth, be configured and operated in a specific azimuth, and therefore should not be construed as limiting the present utility model.

For ease of understanding, in the present embodiment, the direction in which the cartridge 9 extends out of the neck mechanism 2 for writing is downward movement, and the direction in which the cartridge 9 retracts into the neck mechanism 2 is upward movement.

For the purpose of making the objects, technical solutions and advantages of the present utility model more apparent, embodiments of the present utility model will be described in further detail below with reference to the accompanying drawings.

In one embodiment of the present utility model as shown in fig. 1 to 17, a knock pen with an ink accumulation prevention function comprises a pen shaft mechanism 1, a pen neck mechanism 2, a pen core 9 with a pen head 91, and a knock assembly. The writing neck mechanism 2 is connected to the writing shaft mechanism 1 for use as a hand-held portion of a holder for writing on a writing surface, and the knock assembly is adapted to drive the pen core 9 to extend or retract from the writing neck mechanism 2 in the axial direction of the knock pen. The knock assembly comprises, in addition to the conventional mechanism for driving the pen core 9 to extend or retract the neck mechanism 2, a rotation mechanism connected to the pen core 9 and adapted to drive the pen core 9 to rotate about the axis of the knock pen in response to the pen-down and pen-up actions of the holder during writing, during which the pen core 9 is continuously subjected to the reaction pressure of the writing surface, and during which the pen-up action the pen core 9 loses the reaction pressure from the writing surface, and the pen core 9 is repeatedly subjected to and lost from the reaction pressure of the writing surface by the pen core 9, the rotation mechanism repeatedly rotates the pen core 9 about the axis by a predetermined angle in the same direction, thereby enabling the pen core to rotate about the axis in an indexing manner, i.e., the pen core is driven to rotate at intervals, each time by a predetermined angle.

The rotation mechanism includes a knock bar 5 extending along an axis, and first and second ratchet portions provided at both ends of the knock bar 5 in an axis direction, the knock bar 5 being connected to the cartridge 9, the first and second ratchet portions having the same pitch and being disposed to be offset from each other in phase, the pitch defining a predetermined angle at which the cartridge 9 is repeatedly rotated about the axis. In the process of pen-down action, the pressing rod 5 is suitable for being driven by the first ratchet part to drive the pen core 9 to rotate around the axis by a first angle, and in the process of pen-up action, the pressing rod 5 is driven by the second ratchet part to drive the pen core 9 to continuously rotate along the direction driven by the first ratchet part by a second angle. The sum of the first angle and the second angle is equal to a predetermined angle by which the cartridge 9 repeatedly rotates about the axis, which corresponds to the pitch of the first ratchet portion and the second ratchet portion. Preferably, the first angle is equal to the second angle, i.e. the first ratchet portion is out of phase with the second ratchet portion by half a pitch.

When in use, the pressing component is pressed downwards to enable the pen core 9 to extend out of the pen neck mechanism 2, the pen is equivalent to an unwritten pen lifting state, the first ratchet part at the top of the pressing rod 5 is in a disengaged state, and the second ratchet part at the bottom of the pressing rod 5 is in a tightly matched state. When writing, as the pressure of the pen core 9 contacting the writing surface (i.e. paper surface) increases, the pen core 9 pushes the press rod 5 to move upwards under the reaction pressure of the writing surface so that the second ratchet part is disengaged, and as the press rod 5 moves upwards, the first ratchet part starts to be matched, and as the first ratchet part and the second ratchet part have a phase difference, the press rod 5 rotates around the axis in the process of entering the tight fit, so that the pen core 9 is driven to rotate by a first angle along one direction. When the pen lifting action occurs after the pen dropping action is completed, the pen core 9 loses the reaction pressure of the writing surface, the pressing rod 5 moves downwards under the action of the elastic force of the rotating mechanism, so that the second ratchet parts start to be matched again, and the second ratchet parts continuously rotate for a second angle along the driving direction of the first ratchet parts in the process of entering the close fit due to the phase difference of the two ratchet parts. Therefore, in the normal use process, the pen refill 9 is driven by the rotating mechanism to perform 360-degree rotating motion along with repeated switching of the pen-down action and the pen-lifting action, so that the ball is uniformly stressed, and the phenomenon of ink accumulation of the pen head caused by uneven abrasion is avoided.

Specifically, the first ratchet part includes a first ratchet 52 and a spring limiting part 6, the first ratchet 52 is disposed at one end of the knock rod 5, the spring limiting part 6 is provided with a second ratchet 61 suitable for being matched with the first ratchet 52, during the pen-down action, the first ratchet 52 is matched with the second ratchet 61 to drive the knock rod 5 and drive the pen core 9 to rotate around the axis along one direction, and during the pen-lifting action, the first ratchet 52 is disengaged from the second ratchet 61 under the elastic action of the spring limiting part 6. The second ratchet part comprises a third ratchet 53 and a connecting part 8, the third ratchet 53 is arranged at one end of the press rod 5 close to the pen point 91 (namely, one end far away from the first ratchet 52), the connecting part 8 is provided with a fourth ratchet 83 which is suitable for being matched with the third ratchet 53, the third ratchet 53 is separated from the fourth ratchet 83 in the process of pen-down action, and the third ratchet 53 is matched with the fourth ratchet 83 under the action of the elastic force of the spring limiting part 6 in the process of pen-lifting action so as to drive the press rod 5 and drive the pen core 9 to rotate continuously along the driving direction of the first ratchet part.

Specifically, the spring stopper 6 includes a buffer spring 64 and an inner stopper 65, the inner stopper 65 is movably disposed in the spring stopper 6 within a certain range, the buffer spring 64 is disposed in the spring stopper 6, and both ends of the buffer spring 64 abut against the spring stopper 6 and the inner stopper 65, respectively, so as to give an elastic force to the spring stopper 6, so as to apply an elastic force to the inner stopper 65, and thus the knock rod 5 and the cartridge 9. During the pen-down action, the buffer spring 64 is compressed and moved upward by the pressure of the pen core 9, and during the pen-up action, the buffer spring 64 is restored to the original position from the compressed position, so that the engagement connection of the first ratchet 52 and the second ratchet 61 is released by the elastic force of the buffer spring 64 restored to the original position, and the third ratchet 53 and the fourth ratchet 83 are brought into the engagement state.

Specifically, the spring limiting portion 6 further includes a limiting hole 63, and a resilient portion 651 that is matched with the limiting hole 63 is disposed on the surface of the inner plug portion 65, so that the inner plug portion 65 is disposed inside the spring limiting portion 6. Preferably, the elastic portion 651 is in a boss shape, when the inner plug portion 65 can compress the buffer spring 64 to move upwards during the pen-down action, and the elastic portion 651 prevents the inner plug portion 65 from moving downwards excessively during the pen-up action, so as to limit the moving distance of the inner plug portion 65 relative to the spring limiting portion 6. As another embodiment of the present utility model, the inner stopper 65 further includes a groove-shaped circumferential positioning portion 652, the circumferential positioning portion 652 has a hook portion 54 of the knock rod 5 provided therein, the inner stopper 65 pushes the knock rod 5 downward by the hook portion 54 when the cartridge 9 is extended from the inside of the writing-neck mechanism 2, the inner stopper 65 pulls the knock rod 5 by the hook portion 54 to move the knock rod 5 together with the cartridge 9 back along with the spring stopper 6 when the cartridge 9 is retracted into the writing-neck mechanism 2, and the hook portion 54 abuts against the inner stopper 65 to compress the buffer spring 64 to move upward during the pen-down operation.

Specifically, the knock assembly further includes an operating mechanism at least partially extending to the outside of the knock pen, and the bottom of the operating mechanism is connected to the spring stopper 6 to push the rotation mechanism and the cartridge 9 to move in the axial direction. As another embodiment of the present utility model, the operating mechanism includes a rotating wheel 71, a pressing head 72 and a telescopic spring 73, the pressing head 72 is extended to the outside to facilitate the operation of the pencil holder to switch the pencil lead 9 between the extended position and the retracted position in the pencil lead mechanism 2, the rotating wheel 71 is embedded inside the pressing head 72 and the bottom of the rotating wheel 71 is in contact with the spring stopper 6, when the pressing head 72 is pressed down, the pressing head 72 pushes the rotating wheel 71 to move down until the rotating wheel 71 is fixed on the pencil clip 3, the extension of the pencil lead 91 from the pencil lead mechanism 2 is achieved, in this way, the telescopic spring 73 is compressed, the spring stopper 6, the inner plug portion 65 and the buffer spring 64 which are abutted against the rotating wheel 71 when the rotating wheel 71 is moved down are also moved down synchronously with the pressing rod 5, and at this time, the second ratchet portion at the bottom of the pressing rod 5 is just in fit connection, and a distance is left between the first ratchet 52 and the second ratchet 61 at the top of the pressing rod 5. When the cartridge 9 is retracted into the pen neck mechanism 2, the elastic force of the telescopic spring 73 helps the knock assembly to move upward. More specifically, the pen clip 3 may be provided with guide ribs to locate the wheel 71.

More specifically, the spring stopper 6 further includes an outer positioning groove 62, and the outer positioning groove 62 is provided on the outer surface of the spring stopper 6 for being embedded in one end of a guide rail 711 on the surface of the wheel 71, and the other end of the guide rail 711 is embedded in the snap 72, thereby restricting the rotation of the spring stopper 6 in the circumferential direction.

Specifically, the connecting portion 8 may include a return spring 84, two ends of the return spring 84 respectively abut against the connecting portion 8 and the positioning mechanism 4, and when in a pen-lifting state, the cooperative connection between the third ratchet 53 and the fourth ratchet 83 may be ensured by the return spring 84.

Specifically, the positioning mechanism 4 is at least partially connected with the connecting portion 8, the end surface portion of the positioning mechanism 4 away from the connecting portion 8 is tightly matched with the pen holder mechanism 1 to limit the circumferential rotation of the positioning mechanism 4, and an abutting end surface 43 engaged with the return spring 84 is formed on the surface of the positioning mechanism 4. More specifically, the positioning mechanism 4 includes an elastic boss 41, and the connecting portion 8 has a through hole 81 that mates with the elastic boss 41. The elastic boss 41 is disposed in the through hole 81, when the pen core 9 extends from the pen neck mechanism 2, the third ratchet 53 of the press rod 5 is connected with the fourth ratchet 83 of the connecting part 8 in a matched manner and drives the connecting part 8 to move downwards until the pen point 91 is in an extending state, so that the upward moving direction of the connecting part 8 is limited by the positioning mechanism 4 through the elastic boss 41, and the third ratchet 53 and the fourth ratchet 83 are conveniently and smoothly separated during writing. Preferably, the elastic boss 41 has the same structure as the elastic portion 651, and the through hole 81 has the same structure as the limit hole 63.

Specifically, the positioning mechanism 4 has a strip-shaped protruding portion 42 on a surface thereof, and the connecting portion of the connecting portion 8 and the positioning mechanism 4 is provided with an inner positioning groove 82 adapted to be fitted into the strip-shaped protruding portion 42, so that the positioning mechanism 4 restricts the circumferential movement of the connecting portion 8.

Specifically, the inner wall of the push rod 5 is provided with a clamping part 51, and the rotating mechanism is connected with the pen core 9 through the clamping part 51 so as to drive the pen core 9 to rotate.

The terms and expressions which have been employed herein are used as terms of description and not of limitation. The use of these terms and expressions is not meant to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications are possible and are intended to be included within the scope of the claims. Other modifications, variations, and alternatives are also possible. Accordingly, the claims should be looked to in order to cover all such equivalents.

Also, it should be noted that while the present utility model has been described with reference to the particular embodiments presently, it will be appreciated by those skilled in the art that the above embodiments are provided for illustration only and that various equivalent changes or substitutions may be made without departing from the spirit of the utility model, and therefore, the changes and modifications to the above embodiments shall fall within the scope of the claims of the present utility model as long as they are within the true spirit of the utility model.

Claims (10)

1. A pressing pen with an ink accumulation preventing function comprises a pen holder mechanism, a pen neck mechanism, a pen core with a pen point and a pressing assembly; the pen neck mechanism is connected with the pen holder mechanism and used as a hand-held part of a pen holder so as to write on a writing surface, the pressing assembly is suitable for driving the pen core to extend or retract into the pen neck mechanism along the axial direction of the pressing pen, and the pressing assembly is characterized by comprising a rotating mechanism which is connected with the pen core and is suitable for driving the pen core to rotate around the axial line in response to the pen falling and pen lifting actions of the pen holder during writing, wherein the pen core continuously bears the reaction pressure of the writing surface during the pen falling actions, and the pen core loses the reaction pressure from the writing surface during the pen lifting actions, and the pen core repeatedly bears and loses the reaction pressure of the writing surface through the pen core, so that the pen core can repeatedly rotate around the axial line by a preset angle along the same direction, and the pen core can rotate around the axial line in an indexing mode in 360 degrees.

2. The knock pen with an ink accumulation preventing function according to claim 1, wherein said rotation mechanism includes a knock lever extending along said axis and first and second ratchet portions provided at both ends of said knock lever in said axis direction, said knock lever being connected to said cartridge, said first and second ratchet portions having the same pitch and being disposed offset from each other in phase, said pitch defining said predetermined angle at which said cartridge is repeatedly rotated around said axis;

in the pen-down action process, the pressing rod is suitable for being driven by the first ratchet part to drive the pen refill to rotate around the axis for a first angle; in the pen lifting action process, the pressing rod is driven by the second ratchet part to drive the pen refill to continuously rotate for a second angle along the direction driven by the first ratchet part, and the sum of the first angle and the second angle is equal to a preset angle of repeated rotation of the pen refill around the axis.

3. The knock pen with ink accumulation preventing function according to claim 2, wherein,

the first ratchet part comprises a first ratchet and a spring limiting part, the first ratchet is arranged at one end of the pressing rod, which is far away from the pen point, the spring limiting part is provided with a second ratchet which is suitable for being matched with the first ratchet, in the process of pen-down action, the first ratchet is matched with the second ratchet to drive the pressing rod and drive the refill to rotate around the axis, and in the process of pen-lifting action, the first ratchet is separated from the second ratchet under the elastic action of the spring limiting part;

the second ratchet part comprises a third ratchet and a connecting part, the third ratchet is arranged at one end of the pressing rod, which is close to the pen point, the connecting part is provided with a fourth ratchet which is suitable for being matched with the third ratchet, the third ratchet is separated from the fourth ratchet in the pen-down action process, and the third ratchet is matched with the fourth ratchet under the elastic action of the spring limiting part in the pen-lifting action process so as to drive the pressing rod and drive the pen core to rotate continuously along the driving direction of the first ratchet part.

4. The knock pen with an ink accumulation prevention function according to claim 3, wherein the spring limit portion includes a buffer spring and an inner plug portion, the inner plug portion is movably disposed in the spring limit portion in a certain range, the buffer spring is disposed in the spring limit portion, both ends of the buffer spring are respectively abutted against the spring limit portion and the inner plug portion, and during the pen lifting operation, the engagement of the first ratchet and the second ratchet is released by the buffer spring.

5. The knock pen with ink accumulation prevention function according to claim 4, wherein the spring stopper further comprises a stopper hole, and the inner stopper surface is provided with an elastic portion fitted with the stopper hole, thereby disposing the inner stopper inside the spring stopper.

6. The knock pen with ink accumulation prevention function according to claim 4, wherein the knock assembly further comprises an operation mechanism extending at least partially to the outside of the knock pen, the operation mechanism bottom being connected to the spring stopper to push the rotation mechanism and the cartridge to move in the axial direction.

7. The pressing pen with ink accumulation preventing function according to claim 6, wherein the connecting portion comprises a return spring, two ends of the return spring are respectively abutted against the connecting portion and the positioning mechanism, and during the pen lifting action, the cooperation of the third ratchet and the fourth ratchet is ensured through the return spring.

8. The knock pen with an ink accumulation preventing function according to claim 7, wherein the positioning mechanism is at least partially connected to the connecting portion, and an abutment end surface abutting the return spring is formed on a surface of the positioning mechanism.

9. The knock pen with ink accumulation preventing function according to claim 8, wherein the surface of the positioning mechanism has a bar-shaped convex portion, and the connecting portion of the connecting portion and the positioning mechanism is provided with an inner positioning groove adapted to be fitted into the bar-shaped convex portion, so that the positioning mechanism restricts the circumferential movement of the connecting portion.

10. The knock pen with ink accumulation prevention function according to claim 2, wherein a grip is provided on an inner wall of the knock lever, and the knock lever is connected with the cartridge through the grip to thereby drive the cartridge to rotate.