CN218640600U - Multi-color pressing pen with replaceable refill - Google Patents

Abstract

The application discloses polychrome pressing pen of removable refill, polychrome pressing pen includes the position circle, and position circle one side terminal surface has the pen-holder connecting portion that is used for connecting the pen-holder, and another side terminal surface of position circle has and is used for connecting the neck of a writing brush connecting portion of neck of a writing brush, neck of a writing brush and pen-holder pass through the position circle and link together, have a plurality of refill location portions on the position circle, and a plurality of refills pass a plurality of refill location portions respectively and are connected with refill actuating mechanism. The pen neck is connected with the pen neck connecting portion of position circle detachably for when detaching the pen neck from pen neck connecting portion, a plurality of refills pass a plurality of refill location portions of position circle and expose accommodation space, thereby can dismantle and replace a plurality of refills through location portion. Through being provided with the position circle between pen-holder and pen neck, realize that the user can fix a position fast and install when the replacement refill.

Description

Multi-color pressing pen with replaceable refill

Technical Field

The utility model relates to the technical field of stationery, in particular to a polychrome pressing pen of removable refill.

Background

Most of multi-color pressing ball-point pens or multi-color pressing medium oil pens in the market generally comprise pen shells, wherein refills are arranged in the pen shells, blind insertion is needed when the refills are replaced, great inconvenience is caused to the replacement of the refills, and the patience of users is very needed to be examined. The multi-color pressing pens in the market are basically similar in structure, are not beneficial to a user to replace the pen core, and even can cause damage to other accessories due to blind insertion when the user replaces the pen core. Therefore, the structure of the multi-color pressing pen needs to be optimized, so that a user can more accurately and quickly replace the pen core of the multi-color pressing pen.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a polychrome pressing pen of removable refill is favorable to the user to fix a position the realization installation fast when replacing the refill.

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

a multi-color knock pen with replaceable cartridges includes a neck, a shaft, a plurality of cartridges, and a cartridge driving mechanism detachably connected to the plurality of cartridges for selectively driving one of the cartridges to be ejected from or retracted into the neck.

The multicolor pressing pen further comprises a positioning ring, wherein a pen holder connecting part used for connecting a pen holder is arranged on one side end face of the positioning ring, the other side end face of the positioning ring is provided with a pen neck connecting part used for connecting the pen neck, the pen neck and the pen holder are connected together through the positioning ring, a plurality of refill positioning parts are arranged on the positioning ring, and a plurality of refills respectively penetrate through the refill positioning parts and are connected with the refill driving mechanism.

The refill driving mechanism is arranged in an accommodating space surrounded by the positioning ring and the penholder.

The pen neck is connected with the pen neck connecting portion of position circle detachably for when detaching the pen neck from pen neck connecting portion, a plurality of refills pass a plurality of refill location portions of position circle and expose accommodation space, thereby can dismantle and replace a plurality of refills through location portion.

Further, the pen holder connecting part is provided with a limiting device, the limiting device comprises an annular step, the annular step is located in the middle of the positioning ring, the pen holder connecting part extends upwards from the annular step, the pen neck connecting part extends downwards from the annular step, and the annular step is suitable for being abutted against the pen neck and the pen holder to limit the position of the pen neck and the position of the pen holder relative to the positioning ring.

Furthermore, the limiting device also comprises a positioning groove, the positioning groove is matched with a guide rail rib arranged in the pen holder, and the limiting ring rotates relative to the pen holder when the connecting part of the pen holder extends into the pen holder; an annular groove is arranged on the surface of the pen holder connecting part, and the annular groove is connected with an abutting-fit part arranged in the pen holder in a tight fit manner.

Further, the refill driving mechanism comprises a telescopic spring, a guide rail and a knock rod; the pen holder connecting part is connected with and supports one end of a telescopic spring, the other end of the telescopic spring is connected with a thumb stick to apply elastic force to the thumb stick, the thumb stick is guided by a guide rail and can axially reciprocate in the pen holder, and the pen core extends through a pen core positioning part and the telescopic spring and is detachably connected to the bottom of the thumb stick so as to move along with the thumb stick sliding in the guide rail.

Further, refill location portion includes the refill hole, and the refill hole includes spacing portion and extension, and in extension spring stretched into the extension, the internal diameter of extension was greater than the internal diameter of spacing portion, and extension and spacing portion juncture were formed with the terminal surface of butt extension spring one end.

Furthermore, the guide rail is of an internal hollow structure and is connected with the pen holder, the guide rail comprises a plurality of guide rail grooves, inwards-concave clamping grooves are formed in the middle of the guide rail grooves, and the clamping grooves are connected with a clamping mechanism arranged on the press rod in a clamping mode.

Furthermore, the pressing rod comprises a guide boss and a sliding part, the sliding part penetrates through a pressing rod groove formed in the pen holder and extends outwards, and when the multicolor pressing pen needs to be used, the sliding part is pushed by external force, so that the clamping mechanism is connected with the clamping groove in a clamping mode.

Further, the clamping mechanism comprises a clamping groove positioned at the top of the snap rod; when the pressing rod slides downwards, the clamping groove is connected with the clamping groove in a clamping mode.

Furthermore, the sliding part also comprises a sliding table, the sliding table protrudes outwards, and the sliding table limits the movement of the thumb press rod in the rotating direction in the guide rail.

Furthermore, the guide boss slides between the guide rail grooves, the guide boss is of a symmetrical structure, and when the first press rod is connected with the clamping groove in a clamping mode, the guide boss on the second press rod is in downward sliding contact with the guide boss on the first press rod, so that the first press rod is separated from the clamping groove in a clamping mode.

Preferably, the pen holder is connected with a pen clip, the pen clip comprises a clamping part arched towards the outside, and a gap is reserved between the clamping part and the pen holder, so that clamping is provided for the pen clip to be fixed at a certain position.

Preferably, the sheath can be sleeved at the pen neck position according to the requirements of a user, and the pen neck position can be provided with the silica gel sleeve and a fixing groove of the silica gel sleeve.

Preferably, the multi-colored press pen may be provided in a variety of external shapes, including a cylindrical or polygonal shape.

The utility model discloses in, the state is released to the refill is the state that the nib stretches out to the outside of the front end of the pen neck, and the state is in the pen neck that the refill retracts to the refill state.

Preferably, the refill may be selected from a ballpoint pen refill, a medium oil pen refill, a gel ink pen refill or a water based ballpoint pen refill.

According to the pen core, the positioning ring is arranged between the pen holder and the pen neck, and the end face of the positioning ring is exposed out of the corresponding position of the pen core positioning part after the positioning ring is disconnected with the pen neck, so that a user can align the position where the pen core is to be installed and insert the corresponding pen core positioning part when replacing the pen core, and therefore the connection and fixation of the pen core and the corresponding press rod are accurately and conveniently realized, and the pen core has the advantages of being fast, convenient, easy to assemble and the like; meanwhile, the phenomenon of scattered frames or falling off of other accessories when the replacement core is replaced is avoided.

Drawings

The foregoing summary, as well as the following detailed description of the invention, will be better understood when read in conjunction with the appended drawings. It is to be noted that the figures are only intended as examples of the claimed solution.

Fig. 1 is an external view of a multi-color knock pen with a replaceable cartridge according to a first embodiment of the present invention;

fig. 2 is an exploded view of a multi-color knock pen with a replaceable cartridge according to a first embodiment of the present invention;

fig. 3 is a sectional view of a multi-color knock pen with a replaceable cartridge according to a first embodiment of the present invention;

FIG. 4 is a schematic view showing a structure of releasing the connection between the neck and the neck connecting portion of the multi-color knock pen with replaceable cartridge according to the first embodiment of the present invention;

FIG. 5 is a schematic view of a retainer ring of a multi-color knock pen with a replaceable cartridge according to a first embodiment of the present invention;

FIG. 6 is a schematic view of the retainer ring at an angle opposite to that of FIG. 5;

FIG. 7 is a side view of the cage of FIG. 5;

FIG. 8 is a cross-sectional view of the cage of FIG. 5;

FIG. 9 is a top view of the cage of FIG. 8;

fig. 10 is a schematic structural view illustrating a cartridge holder of a multi-color knock pen with a replaceable cartridge according to a first embodiment of the present invention;

fig. 11 is a left side view of the cartridge structure of fig. 10;

FIG. 12 is a sectional view showing a shaft structure of a multi-color knock pen with a replaceable cartridge according to a first embodiment of the present invention;

fig. 13 is a schematic structural view of a guide rail in a multi-color knock pen with a replaceable cartridge according to a first embodiment of the present invention;

FIG. 14 is a schematic view of the guide track configuration at the angle opposite to that of FIG. 13;

FIG. 15 is a front view of the guide track structure of FIG. 13;

FIG. 16 isbase:Sub>A cross-sectional view of the rail structure taken along line A-A of FIG. 15;

FIG. 17 is a top view of the rail construction of FIG. 13;

FIG. 18 is a bottom view of the track structure of FIG. 13;

FIG. 19 is a right side view of the track configuration of FIG. 13;

FIG. 20 is a left side elevational view of the track structure of FIG. 13;

FIG. 21 is a schematic structural view of a knock rod of a multi-color knock pen with replaceable cartridge according to a first embodiment of the present invention;

FIG. 22 is a top view of the thumb stick structure of FIG. 21;

FIG. 23 is a side view showing a knock rod structure of a multi-color knock pen with replaceable cartridge according to a second embodiment of the present invention;

fig. 24 is a rear view illustrating a knock rod structure in a multi-color knock pen with a replaceable cartridge according to a second embodiment of the present invention.

Wherein the reference numerals are as follows:

a pen neck: 1

Mouth part: 11

A pen core: 2

Positioning a ring: 3

Pen neck connecting part 31

End face: 311

A refill hole: 32

Extension part: 321

A limiting part: 322

Connecting the pen holder: 33

Positioning a groove: 331

Ring grooves: 332

Annular step: 333

A pen holder: 4

Positioning the end face: 41

Guide rail ribs: 42

A rod pressing groove: 43

A butting part: 44

The refill driving mechanism: 5

A telescopic spring: 51

Guide rail: 52

Guide rail groove: 521

A clamping groove: 522

Strip-shaped grooves: 523

C, pressing a rod: 53

Guiding a boss: 531

Clamping the groove: 532

A sliding table: 533

Positioning and protruding: 534

A sliding part: 535

Stuck point: 536

Pen clip press stick: 54

A pen clip: 541

Detailed Description

The detailed features and advantages of the present invention are described in detail in the detailed description, which is sufficient for anyone skilled in the art to understand the technical content of the present invention and to implement the present invention, and the related objects and advantages of the present invention can be easily understood by those skilled in the art from the description, the claims and the accompanying drawings disclosed in the present specification.

It should be noted that in this specification, like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be further defined and explained in subsequent drawings.

In the description of the present embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that the product conventionally places when used, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element to which the term refers must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

In a first embodiment of the present invention, as shown in fig. 1 to 22, a multi-color knock pen with replaceable cartridge 2 includes a neck 1, a retainer 3, a shaft 4, a plurality of cartridges 2, and a cartridge driving mechanism 5. The positioning ring 3 is provided with a plurality of refill positioning parts, one side (rear side) end surface of the positioning ring 3 is provided with a penholder connecting part 33 used for connecting a penholder 4, and the other side (front side) end surface of the positioning ring 3 is provided with a pen neck connecting part 31 used for connecting the pen neck 1. The pen neck 1 and the pen holder 4 are detachably connected together through a positioning ring 3. The cartridge driving mechanism 5 is detachably connected to the plurality of cartridges 2 for selectively driving one of the plurality of cartridges 2 to be pushed out or retracted from the barrel 1, and the cartridge driving mechanism 5 is disposed in a receiving space surrounded by the retainer 3 and the barrel 4. When the pen core 2 is replaced, the pen neck 1 can be disconnected with the pen neck connecting part 31 and can be taken down from the multi-color press pen, the pen core 2 can be detached and replaced through the exposed positioning ring 3, and the pen core 2 can be the pen cores 2 with one or more different colors.

For reference, the present embodiment provides a multi-color type knock pen having a 4-pen refill 2, and when the user uses the multi-color type knock pen to replace the refill 2, the connection between the multi-color type knock pen and the pen neck 1 is released by the pen neck connecting part 31, and the inner 4-pen refill 2 and the front end of the positioning ring 3, including the end surface 311 and the refill positioning part, are exposed. Wherein the pen neck connecting part 31 comprises a thread arranged on the positioning ring 3, and the pen neck connecting part is matched with an internal thread arranged on the pen neck 1 to form a threaded connection. When the pen core 2 is replaced, the pen core 2 to be replaced is taken out, namely the pen core 2 is pulled out by external force; secondly, the rear end of a new refill 2 is aligned with the refill positioning part and inserted into the pen holder 4 and pushed and pressed along the axial direction to realize the connection and fixation of the refill 2 and the refill driving mechanism 5, and then the pen point direction of the refill 2 extends out along the opening part 11 of the pen neck 1, thus realizing the whole replacement process. When the user replaces the pen core 2, all parts in the multicolor pressing pen do not need to be detached for reassembly, and the difficulty and time of assembly are reduced.

The refill driving mechanism 5 includes a telescopic spring 51, a guide rail 52 and a knock bar 53; the pen holder connecting part 33 is connected with and supports one end of a telescopic spring 51, the other end of the telescopic spring 51 is connected with a press rod 53 to exert elastic force on the press rod, the press rod 53 is guided by a guide rail 52 and can move back and forth in the pen holder 4 in the axial direction, the pen core 2 extends through a pen core positioning part and the telescopic spring 51 and is connected to the bottom of the press rod 53, so that the pen core 2 moves along with the press rod 53 sliding in the guide rail 52 to form close connection of all components, and when the multicolor press pen is used, all the components are matched to complete driving of the pen core 2. The matching mode of the pen core 2 and the pressing rod 53 is interference fit, the bottom of the pressing rod 53 can be provided with a clamping point 536 so that the pressing rod 53 is clamped inside an oil pipe of the pen core 2, or the inner diameter of the bottom of the pressing rod 53 is smaller than the outer diameter of the oil pipe of the pen core 2, so that the pen core 2 is tightly connected with the pressing rod 53 under the action of external force. Further, in order to facilitate carrying and using the multi-color knock pen, the pen holder may further include a pen clip 541 provided thereon, the pen holder 4 may include a knock groove 43, and the pen clip knock bar 54 may be fitted into the pen clip 541 through the knock groove 43 and may move up and down together with the pen clip 541.

As a preferable scheme, the cartridge positioning portion may be a cartridge hole 32 penetrating through the positioning ring 3, the cartridge hole 32 includes a limiting portion 322 and an extending portion 321, the extension spring 51 extends into the extending portion 321, an inner diameter of the extending portion 321 is greater than an inner diameter of the limiting portion 322, and an end surface abutting against one side of the extension spring 51 is formed at a junction of the extending portion 321 and the limiting portion 322, so that the cartridge 2 may be directly inserted into the extension spring 51 through the cartridge hole 32, and the connection between the cartridge 2 and the extension spring 51 is simply achieved. The other side of the telescopic spring 51 is abutted against the positioning bulge 534 of the snap rod 53, and the opening end of the oil pipe of the pen core 2 can be clamped at the bottom of the snap rod 53 in the telescopic spring 51 to fix the position of the pen core 2, so that the pen core 2 can be conveniently driven by a subsequent pen core driving device.

The pen holder connection part 33 is provided with a limiting device, and the limiting device comprises an annular step 333, a positioning groove 331 and a ring groove 332. The annular step 333 is positioned in the middle of the positioning ring 3, and the annular step 333 is abutted against the positioning end face 41 on the pen holder 4. Extending upwardly from the annular step 333 is a barrel connecting part 33, and extending downwardly from the annular step 333 is a neck connecting part 31. The positioning groove 331 is matched with a guide rail rib 42 arranged in the pen holder 4, and the rotation of the positioning ring 3 relative to the pen holder 4 is limited when the pen holder connecting part 33 extends into the pen holder 4; when the pen neck and the positioning ring 3 are separated in a rotating and releasing mode, the connection between the pen holder 4 and the pen holder connecting part 33 is not influenced by the rotation. The ring groove 332 is formed on the surface of the barrel connecting portion 33, and the ring groove 332 is tightly fitted and connected to the abutting portion 44 formed in the barrel 4. As shown in fig. 4, the neck connecting portion 31 is a detachable portion exposed when the pen core is replaced; the ring groove 332 and the positioning groove 331 of the neck connecting part 31 fix the positions of the barrel 4 and the positioning ring 3 so that they are not detachable when the cartridge 2 is replaced.

The guide rail 52 has a hollow structure and is fixedly connected with the pen holder 4, preferably, the connection mode is interference fit, and the installation is convenient. A plurality of rail grooves 521 are formed in the rail 52, and an inwardly recessed locking groove 522 is formed in the middle of each rail groove 521. The knock rod 53 slides in the rail groove 521, and the top end surface of the knock rod 53 abuts against the top end surface of the rail groove 521, thereby performing a translational motion when the knock rod 53 is assembled by the user. The snap rod 53 comprises a guide boss 531, a sliding part 535 and a clamping mechanism, the clamping groove 522 is in clamping connection with the clamping mechanism arranged on the snap rod 53, the clamping mechanism comprises a clamping groove 532 arranged at the top of the snap rod 53, the sliding part 535 penetrates through the snap rod groove 43 arranged on the pen holder 4 to extend outwards, when the multicolor snap pen needs to be used, the sliding part 535 is pushed downwards by external force, the sliding part 535 drives the snap rod 53 to move downwards, and the clamping groove 532 arranged at the top of the snap rod 53 is in clamping connection with the clamping groove 522. The guide bosses 531 slide between the guide rail grooves 521, the guide bosses 531 are bilaterally symmetrical, and when the first snap rod 53 is engaged with the engaging groove 522, the guide bosses 531 on the second snap rod 53 slide downward to contact the guide bosses 531 on the first snap rod 53, so that the first snap rod 53 is disengaged from the engaging groove 522. The outer surface of the guide rail 52 is provided with a strip-shaped groove 523 which is matched with the guide rail rib 42, so that the guide rail 52 is embedded into the pen holder 4, a user can directionally install the guide rail 52 and the positioning groove 331 through the guide rail rib 42 when installing the multicolor knock pen, the knock rod 53 in the guide rail 52 corresponds to the position of the pen core 2 which is installed through the pen core positioning part, and the knock rod 53 is quickly connected to the knock rod 53 when replacing the pen core 2.

The principle of pressing the refill driving mechanism 5 is as follows: when the sliding portion 535 slides downward by an external force, the first knock rod 53 moves in the guide groove 521, and the catching groove 532 of the first knock rod 53 is fitted into the catching groove 522 of the guide rail 52, the first knock rod 53 and the guide rail 52 are continuously engaged in the stationary state by the biasing force of the extension spring 51, and the pen tip of the pen core 2 is pushed out from the mouth portion 11 of the pen neck 1, so that the user is in the writing state. When the user wants to retract the pen core 2 into the pen neck 1, the user can slide the sliding part 535 of the second pressing rod 53 downwards, after the guiding boss 531 sliding downwards contacts with the guiding boss 531 on the first pressing rod 53, the first pressing rod 53 in the clamping state moves downwards for a short distance under the action of force, so that the clamping groove 532 of the first pressing rod 53 is separated from the clamping groove 522 on the guide rail 52, the first pressing rod 53 rebounds to the original position under the action of the elastic force of the extension spring 51, at this time, the sliding part 535 of the second pressing rod 53 is released, the resetting state of all the pen cores 2 is completed, and the pen points on the pen cores 2 are also retracted into the pen neck 1. When the user wants to use the pen core 2 connected with the second knock bar 53, the user can further slide the sliding part 535 of the second knock bar 53 downward to engage the locking groove 532 of the second knock bar 53 with the locking groove 522 of the guide rail 52, and the pen core 2 of the second knock bar 53 is also pushed out from the mouth part 11.

As shown in fig. 23-24, in the second embodiment of the present invention, the sliding part 535 further includes a sliding table 533 protruding outward, the sliding table 533 is distributed on the left and right sides of the snapping bar and respectively connected to the guiding groove 521, the end surface of the sliding table 533 can be attached to the guiding groove 521 to limit the movement of the snapping bar 53 in the guiding rail 52 in the rotation direction, so as to avoid pressing the sliding space of other snapping bars 53; a small space may be left between the end surface and the rail groove 521, and the knock rod 53 may swing in the right and left direction in the rail 52 in a small range, thereby reducing wear.

The terms and expressions which have been employed are used as terms of description and not of limitation. The use of such terms and expressions is not intended to exclude any equivalents of the features shown and described (or portions thereof), and it is recognized that various modifications may be made 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, although the present invention has been described with reference to the specific embodiments, it should be understood by those skilled in the art that the above embodiments are only for illustrating the present invention, and that various equivalent changes or substitutions can be made without departing from the spirit of the present invention, and therefore, it is intended that all changes and modifications to the above embodiments within the scope of the present invention be included in the claims of the present invention.

Claims (10)

1. A multi-color press pen capable of replacing a cartridge, the multi-color press pen comprising a neck, a shaft, a plurality of cartridges, and a cartridge driving mechanism detachably connected to the plurality of cartridges for selectively driving one of the cartridges to be ejected from or retracted into the neck, characterized in that:

the multicolor pressing pen further comprises a positioning ring, wherein one side end face of the positioning ring is provided with a pen holder connecting part used for connecting the pen holder, the other side end face of the positioning ring is provided with a pen neck connecting part used for connecting the pen neck, the pen neck and the pen holder are connected together through the positioning ring, the positioning ring is provided with a plurality of pen core positioning parts, and the plurality of pen cores penetrate through the plurality of pen core positioning parts respectively and are connected with the pen core driving mechanism;

the pen core driving mechanism is arranged in an accommodating space surrounded by the positioning ring and the pen holder;

the cap is detachably connected to the cap connecting portion of the retainer, so that the plurality of cartridges pass through the plurality of cartridge positioning portions of the retainer to be exposed to the accommodating space when the cap is detached from the cap connecting portion, thereby enabling the plurality of cartridges to be detached and replaced through the positioning portions.

2. A multi-color press pen with a replaceable cartridge as claimed in claim 1, wherein the barrel connecting part is provided with a stopper including an annular step at a middle portion of the retainer, the barrel connecting part extends upward from the annular step, the neck connecting part extends downward from the annular step, and the annular step is adapted to abut against the neck and the barrel to define a position of the neck and the barrel relative to the retainer.

3. A multi-color press pen as claimed in claim 2, wherein the stopper further comprises a positioning groove which is engaged with a rail rib provided in the pen holder to restrict the positioning ring from rotating relative to the pen holder when the pen holder connecting part is inserted into the pen holder; the pen holder is characterized in that an annular groove is formed in the surface of the pen holder connecting portion, and the annular groove is connected with a butting portion arranged in the pen holder in a tight fit mode.

4. The multi-color knock pen according to claim 1, wherein the cartridge driving mechanism comprises a telescopic spring, a guide rail and a knock bar; the pen holder connecting part is connected with and supports one end of the extension spring, the other end of the extension spring is connected with the thumb stick to apply elastic force to the thumb stick, the thumb stick is guided by the guide rail and can move back and forth in the pen holder in the axial direction, and the pen core extends through the pen core positioning part and the extension spring and is detachably connected with the bottom of the thumb stick so as to move along with the thumb stick sliding in the guide rail.

5. The multi-color press pen according to claim 4, wherein the cartridge positioning part comprises a cartridge hole, the cartridge hole comprises a stopper and an extension part, the extension spring is inserted into the extension part, the extension part has an inner diameter larger than that of the stopper, and an end surface abutting against one end of the extension spring is formed at the interface of the extension part and the stopper.

6. The multi-color press pen with a replaceable cartridge as claimed in claim 4, wherein the guide rail is hollow inside and connected to the pen holder, and comprises a plurality of guide rail grooves, and a clamping groove is formed in the middle of each guide rail groove and is engaged with a clamping mechanism provided on the knock rod.

7. The multi-color knock pen with a replaceable cartridge according to claim 6, wherein the knock rod includes a guide boss and a sliding portion, the sliding portion extends outward through a knock rod groove provided on the pen holder, and when the multi-color knock pen needs to be used, the sliding portion is pushed by external force, so that the clamping mechanism is engaged with the engaging groove.

8. The multi-color knock pen with a replaceable cartridge according to claim 7, wherein the chucking mechanism comprises a chucking groove at the top of the knock rod; when the press rod slides downwards, the clamping groove is clamped and connected with the clamping groove.

9. The multi-color knock pen of claim 7, wherein the sliding part further comprises a sliding table, the sliding table being protruded outward, the sliding table restricting movement of the knock bar in a rotational direction in the guide rail.

10. The multi-color knock pen with a replaceable cartridge according to claim 7, wherein the guide bosses slide between the guide grooves, the guide bosses are symmetrical, and when the first knock bar is engaged with the catching grooves, the guide bosses on the second knock bar slide downward to contact the guide bosses on the first knock bar, so that the first knock bar is disengaged from the catching grooves.

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