CN215397887U

CN215397887U - Pressing type pen

Info

Publication number: CN215397887U
Application number: CN202121186659.2U
Authority: CN
Inventors: 颜鲁彬
Original assignee: Shanghai Kaco Industrial Co ltd
Current assignee: Shanghai Kaco Industrial Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2022-01-04
Anticipated expiration: 2031-05-28

Abstract

The present application provides a knock-type pen. The pressing type pen comprises a pen body, a pen core and a pressing mechanism. A hollow part penetrating along the length direction of the pen body is arranged in the pen body; the inner wall of the pen body is provided with a limiting structure. The refill is movably arranged in the hollow part and comprises a refill tip part. The pressing mechanism is movably arranged in the hollow part, the first end of the pressing mechanism close to the pen point part is abutted with the limiting structure, and the end of the pen core departing from the pen point part is abutted with the pressing mechanism. The pressing type pen comprises a writing state and a non-writing state, and in the writing state, the pressing mechanism drives the pen core to move until the pen point part extends out of the hollow part; in the non-writing state, the pressing mechanism drives the pen core to move until the pen point part is accommodated in the hollow part.

Description

Pressing type pen

Technical Field

The application relates to the technical field of stationery commodities, in particular to a pressing type pen.

Background

The knock type pen includes a pen core, a pen body and a knock mechanism located in the pen body. When the refill of the pressing type pen is arranged in the pen body, one end of the refill, which is far away from the pen point, is abutted against the pressing mechanism.

When the existing pressing type pen is used for replacing the pen core, the pressing mechanism can fall out of the pen body, so that the operation is troublesome when the pen core is replaced, and the use experience of a user is influenced.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application provides a pressing type pen. The knock type pen includes:

the pen body is internally provided with a hollow part penetrating along the length direction of the pen body, and comprises a first pen holder and a second pen holder which are detachably connected; the inner wall of the pen body is provided with a limiting structure;

the refill is movably arranged in the hollow part and comprises a refill tip part;

the pressing mechanism is movably arranged in the hollow part, a first end of the pressing mechanism close to the pen point part is abutted with the limiting structure, and one end of the pen core, which is far away from the pen point part, is abutted with the pressing mechanism;

the pressing type pen comprises a writing state and a non-writing state, and in the writing state, the pressing mechanism drives the pen core to move until the pen point part extends out of the hollow part; in the non-writing state, the pressing mechanism drives the pen core to move until the pen point part is accommodated in the hollow part.

In one embodiment, the limiting structure is a limiting protrusion formed by protruding the inner wall of the pen body.

In one embodiment, the limiting protrusion is of an annular structure.

In one embodiment, the knock type pen further comprises a knock head, the knock mechanism further comprises a second end opposite to the first end, the second end of the knock mechanism is abutted with the knock head, and the knock head at least partially protrudes out of the hollow part; the pressing head moves along the length direction of the pen body to drive the pressing mechanism to move, so that the pressing type pen is switched between the writing state and the non-writing state.

In one embodiment, the knock type pen further comprises a first elastic member, the inner wall of the pen body is further provided with a limit part, a first end of the first elastic member abuts against the knock head, and a second end of the elastic member abuts against the limit part.

In one embodiment, the limiting part comprises a limiting boss formed by the protrusion of the inner wall of the pen body and an annular retaining wall formed by the extension of the limiting boss towards the direction of the press head, the first elastic part is abutted against the limiting boss, and the first elastic part is located between the annular retaining wall and the inner wall of the pen body.

In one embodiment, the snap mechanism is located within the annular retaining wall.

In one embodiment, the pressing mechanism comprises a first pressing member and a second pressing member cooperating with the first pressing member; the inner wall of the pen body is provided with a limiting piece in limiting fit with the second pressing piece;

the first end of the first pressing piece is abutted against the pressing head, the second end of the first pressing piece is matched with the first end of the second pressing piece, and the second end of the second pressing piece is abutted against the pen core; the pressing head moves along the length direction of the pen body to drive the first pressing part to move, the first pressing part drives the second pressing part to move, and the second pressing part drives the pen core to move;

when the pressing type pen is in a writing state, the pressing mechanism is in a first state, the limiting piece limits the second pressing piece to a first position, and the pen core part extends out of the hollow part; when the knock type pen is in a non-writing state, the knock mechanism is in a second state, the limiting piece is separated from the second knock piece, the second knock piece is positioned at a second position, and the pen core is accommodated in the hollow part; the distance between the second position and the end part of the pen body close to the press head is smaller than the distance between the first position and the end part of the pen body close to the press head.

In one embodiment, the limiting member comprises a plurality of guide rails, and one end of each guide rail, which is close to the pen core, is provided with a first helical tooth; the guide rails are arranged on the inner wall of the pen body at intervals along the circumferential direction of the pen body;

a plurality of first guide grooves matched with the guide rails are formed in the side wall of the second pressing piece, and second inclined teeth matched with the first inclined teeth are formed in one end, far away from the pen core, of the second pressing piece;

the side wall of the first pressing piece is provided with a plurality of second guide grooves matched with the guide rails, and the guide rails are positioned in the corresponding second guide grooves; the end part of the first pressing piece close to the pen core is provided with a third helical tooth matched with the second helical tooth, the first pressing piece moves along the length direction of the pen body, and the third helical tooth is abutted against the second helical tooth so as to drive the second pressing piece to move;

when the knock type pen is in a writing state, the first helical teeth are abutted with the second helical teeth, and the second knock part is limited at the first position; when the pressing type pen is in a non-writing state, the first inclined teeth are separated from the second inclined teeth, the guide rail is positioned in the corresponding first guide groove, and the second pressing piece is positioned at the second position.

In one embodiment, the pen core further comprises an ink storage tube, and the pen point part is connected to the end part of the ink storage tube far away from the pressing mechanism; the pressing type pen further comprises a second elastic piece sleeved on the pen core, one end of the elastic piece is abutted to the ink storage tube, and the other end of the second elastic piece is abutted to the inner wall of the pen body.

In one embodiment, the pen body comprises a first pen rod and a second pen rod which are detachably connected.

According to the pressing type pen provided by the embodiment of the application, the writing state and the non-writing state of the pressing type pen can be switched through the pressing mechanism; set up limit structure through the inner wall at the body of a brush, and pressing mechanism is close to the first end and the limit structure looks butt of nib portion, then when dismantling first pen-holder and second pen-holder and open and change the refill, pressing mechanism can not fall out from the cavity, and the user operates fairly simplely when changing the refill, helps promoting user's use and experiences.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

FIG. 1 is a cross-sectional view of a knock type pen provided in accordance with an exemplary embodiment of the present application;

FIG. 2 is a partial cross-sectional view of a knock type pen provided in accordance with an exemplary embodiment of the present application;

FIG. 3 is a side view of a knock type pen provided in accordance with an exemplary embodiment of the present application;

FIG. 4 is a side view of a knock type pen provided in accordance with an exemplary embodiment of the present application;

FIG. 5 is a partial cross-sectional view of a knock type pen provided in an exemplary embodiment of the present application in one state;

FIG. 6 is a partial cross-sectional view of a knock type pen provided in another exemplary embodiment of the present application in another state;

FIG. 7 is a partial cross-sectional view of a knock type pen provided in yet another exemplary embodiment of the present application in a further state;

FIG. 8 is a partial cross-sectional view of a knock type pen in yet another state according to still another exemplary embodiment of the present application.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.

The following describes in detail a knock type pen according to an embodiment of the present invention with reference to the accompanying drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.

The embodiment of the application provides a pressing type pen. Referring to fig. 1 to 4, the knock-type pen 100 includes a pen body 10, a pen core 20, and a knock mechanism 30. The pen body 10 is provided therein with a hollow portion 11 penetrating in a longitudinal direction of the pen body 10. The inner wall of the pen body 10 is provided with a limiting structure 12. The pen core 20 is movably arranged in the hollow part 11, and the pen core 20 comprises a pen point part 21. The pressing mechanism 30 is movably disposed in the hollow portion 11, a first end of the pressing mechanism 30 close to the nib portion 21 abuts against the limiting structure 12, and an end of the pen core 20 away from the nib portion 21 abuts against the pressing mechanism 30.

The knock type pen 100 includes a writing state in which the knock mechanism 30 moves the pen core 20 to a point where the nib portion 21 partially protrudes out of the hollow portion 11, and a non-writing state in which a user can write using the knock type pen 100. In the non-writing state, the knock mechanism 30 moves the pen core until the pen tip portion 21 is accommodated in the hollow portion 11.

The pressing pen provided by the embodiment of the application can realize the switching between the writing state and the non-writing state of the pressing pen 100 through the pressing mechanism 30; through setting up limit structure 12 at the inner wall of body 10, and pressing mechanism 30 is close to the first end and the looks butt of limit structure 12 of nib portion 21, then when dismantling the change refill with first pen pole 101 with second pen pole 102, pressing mechanism 30 can not fall out from hollow portion 11, and the operation is fairly simple when the user changes the refill, helps promoting user's use and experiences.

In one embodiment, the pen body 10 includes a first barrel 101 and a second barrel 102 that are removably connected. When the user replaces the refill, the refill is inserted into one of the first pen holder 101 and the second pen holder 102, and then the refill can be replaced by connecting the first pen holder 101 with the second pen holder 102, so that the operation is convenient.

The first pen rod 101 and the second pen rod 102 are both hollow structures, and the hollow part 11 is formed inside the first pen rod 101 and the second pen rod 102 together. The knock mechanism 30 is installed in the first pen shaft 101.

In one embodiment, the first barrel 101 and the second barrel 102 may be detachably connected by a screw thread. One of the end of the first barrel 101 close to the second barrel 102 and the end of the second barrel 102 close to the first barrel 101 is provided with an external thread, and the other is provided with an internal thread, so that the first barrel 101 and the second barrel 102 can be detachably connected through the thread. In the illustrated embodiment, the end of the first barrel 101 adjacent to the second barrel 102 is provided with an internal thread, the end of the second barrel 102 adjacent to the first barrel 101 is provided with an external thread, and the internal thread of the first barrel 101 matches the external thread of the second barrel 102. Therefore, the first pen holder 101 is in threaded connection with the second pen holder 102, the first pen holder 101 and the second pen holder 102 are simple in structure and firm and reliable in connection, and the first pen holder 101 and the second pen holder 102 can be conveniently mounted and dismounted.

In the illustrated embodiment, the first barrel 101 has a large length, and the second barrel 102 has a small length. In other embodiments, the length of the first pen shaft 101 may be substantially the same as the length of the second pen shaft 102, or the length of the first pen shaft 101 may be less than the length of the second pen shaft 102.

In one embodiment, the limiting structure 12 is a limiting protrusion formed by protruding the inner wall of the pen body 10. The limiting structure 12 and the pen body 10 can be integrally formed, which is helpful for simplifying the complexity of the manufacturing process of the pen body 10. In other embodiments, the limiting structure 12 and the pen body 10 may not be a single structure, for example, the limiting protrusion may be formed on the inner wall of the pen body 10 by means of adhesion.

In one embodiment, the limiting protrusion is of an annular structure. In other embodiments, the limiting protrusion may also be a plurality of protrusions arranged at intervals along the circumferential direction.

In one embodiment, the knock type pen 100 further includes a knock head 40, the knock mechanism 30 further includes a second end opposite to the first end, the second end of the knock mechanism 30 abuts against the knock head 40, and the knock head 40 at least partially protrudes from the hollow portion 11. The pressing head 40 moves along the longitudinal direction of the pen body 10 to drive the pressing mechanism 30 to move, so that the pressing pen is switched between the writing state and the non-writing state. Since the knock tip 40 at least partially protrudes from the hollow portion 11 of the pen body 10, the user can press the portion of the knock tip 40 protruding from the hollow portion 11 of the pen body 10 to switch between the writing state and the non-writing state of the knock type pen 100, thereby facilitating the user's operation.

In one embodiment, a boss is provided on the inner wall of the end of the pen body 10 facing away from the pen core 20, the outer part of the end of the pressing head 40 close to the pen core 20 protrudes to form a convex edge, and when the pressing head 40 moves away from the pen core 20, the convex edge of the pressing head 40 abuts against the boss of the pen body 10, thereby preventing the pressing head 40 from separating from the pen body 10.

In one embodiment, the knock-type pen 100 further includes a first elastic member 50, the inner wall of the pen body 10 is further provided with a limiting portion 13, one end of the first elastic member 50 abuts against the knock head 40, and the other end of the elastic member abuts against the limiting portion 13. When the knock type pen 100 is used, the user presses the knock 40 to move the knock 40 along the length direction of the pen body 10, and further drives the pen point 21 of the pen core 20 to partially expose the pen body 10, the knock 40 compresses the first elastic member 50, and the knock type pen 100 is in a writing state; subsequently, the user releases the pressing head 40, the first elastic member 50 is stretched, and the pressing head 40 is moved to the initial position by the first elastic member 50; after the knock pen 100 is used, the user pushes and releases the knock tip 40 again to allow the nib portion 21 of the pen core 20 to be accommodated in the hollow portion 11, the knock tip 40 moves to the initial position by the first elastic member 50, the position of the knock tip 40 is kept fixed and does not shake freely, and the knock pen 100 is in a non-writing state. It can be seen that the position of the knock type pen 100 is maintained constant in both the writing state and the non-writing state, and is not shaken arbitrarily.

In one embodiment, the first elastic member 50 abuts an end of the knock bar 40. In other embodiments, the pressing head 40 may be a hollow structure, the inner wall of the pressing head 40 protrudes to form a protruding structure, and the first elastic member 50 may partially enter into the pressing head 40 and abut against the protruding structure.

In one embodiment, the position-limiting portion 13 includes a position-limiting boss 131 formed by the protrusion of the inner wall of the pen body 10 and an annular retaining wall 132 formed by the position-limiting boss 131 extending toward the direction of the thumb press 40, the first elastic member 50 abuts against the position-limiting boss 131, and the first elastic member 50 is located between the annular retaining wall 132 and the inner wall of the pen body 10. With this arrangement, the annular wall 132 restricts the movement of the first elastic member 50 except for the movement along the length direction of the pen body 10, and ensures the smooth movement of the knock head 40.

In one embodiment, the pen core 20 further comprises an ink storage tube 22, and the pen tip 21 is connected to an end of the ink storage tube 22 far away from the pressing mechanism 30. The knock type pen further includes a second elastic member 60 sleeved on the pen core 20, one end of the second elastic member 60 abuts against the ink storage tube 22, and the other end of the second elastic member 60 abuts against the inner wall of the pen body 10. The second elastic member 60 is engaged with the knock mechanism 30 to switch between the writing state and the non-writing state of the knock pen.

In one embodiment, the snap mechanism 30 is located within the annular wall 132. So configured, the disposition of the annular wall 132 does not affect the movement of the pressing mechanism 30. The pressing head 40 may have a hollow structure, and the first end of the pressing mechanism 30 may be partially inserted into the pressing head 40.

In one embodiment, the pressing mechanism 30 includes a first pressing member 31 and a second pressing member 32 coupled to the first pressing member 31. The inner wall of the pen body 10 is provided with a limiting member in limiting fit with the second pressing member 32. The first end of the first pressing member 31 is abutted against the pressing head 40, the second end of the first pressing member 31 is matched with the first end of the second pressing member 32, and the second end of the second pressing member 32 is abutted against the pen core 20. The pressing head 40 moves along the length direction of the pen body 10 to drive the first pressing member 31 to move, the first pressing member 31 drives the second pressing member 32 to move, and the second pressing member 32 drives the pen core 20 to move.

As shown in fig. 1 and 5, when the knock-type pen is in the writing state, the knock mechanism 30 is in the first state, the second knock member 32 is limited at the first position by the limiting member, and the nib portion 21 of the pen core 20 protrudes out of the hollow portion 11. As shown in fig. 6, when the knock type pen is in the non-writing state, the knock mechanism 30 is in the second state, the stopper is disengaged from the second knock member 32, the second knock member 32 is located at the second position, and the nib portion 21 of the pen core 20 is accommodated in the hollow portion. Wherein, the distance between the second position and the end part of the pen body 10 close to the press head 40 is smaller than the distance between the first position and the press head 40.

In one embodiment, referring to fig. 5 to 8, the limiting member includes a plurality of guide rails 14, and one end of the guide rail 14 near the pen core 20 is provided with a first helical tooth 141; the plurality of guide rails 14 are disposed on an inner wall of the pen body 10 at intervals in a circumferential direction of the pen body 10. The side wall of the second pressing member 32 is provided with a plurality of first guide grooves adapted to the guide rail 14, and one end of the second pressing member 32 away from the pen core 20 is provided with a plurality of second helical teeth 321 adapted to the first helical teeth 141.

The side wall of the first snap member 31 is provided with a plurality of second guide grooves adapted to the guide rails 14, and the guide rails 14 are located in the corresponding second guide grooves. The end of the first pressing member 31 close to the pen core 20 is provided with a third helical tooth 311 matched with the second helical tooth 321, the first pressing member 31 moves along the length direction of the pen body 10, and the third helical tooth 311 abuts against the second helical tooth 321 to drive the second pressing member to move.

When the knock type pen is in a writing state, the first helical teeth 141 are abutted with the second helical teeth 321, so that the second knock member 32 is limited to the first position; when the knock type pen is in the non-writing state, the first inclined teeth 141 are disengaged from the second inclined teeth 321, the guide rails 14 are located in the corresponding first guide grooves, and the second knock member 32 is located at the second position, as shown in fig. 6.

In the present embodiment, the first knock member 31 includes a third helical tooth 311, and the second knock member 32 includes a second helical tooth 321. The third helical tooth 311 of the first knock member 31 is provided with one second guide groove every other oblique plane, and the second helical tooth 321 of the second knock member 32 is provided with one first guide groove every other two oblique planes. The inner wall of the pen body 10 is provided with guide rails 14 with the same number as the first guide grooves and the second guide grooves, the starting point of the upper end of each guide rail 14 is located on one side of the limiting boss 131 close to the third helical tooth 311, the lower end of each guide rail 14 is recessed into the second guide grooves of the second helical tooth 321 and the third helical tooth 311, the width of each guide rail is basically consistent with the width of the first guide groove and the width of the second guide groove, one end of each guide rail 14 close to the pen core 20 is provided with a first helical tooth 141, and the chamfer angle of each first helical tooth 141 is basically the same as the chamfer angle of each second helical tooth 321.

When the knock type pen is not used, it is in a non-writing state, as shown in fig. 6, the knock head 40 and the pen core 20 are both located at an initial position, the pen tip portion 21 of the pen core 20 is accommodated in the hollow portion 11, the knock mechanism 30 is in the second state, the stopper is separated from the second knock member 32, the second knock member 32 is located at a second position, and the guide rail 14 is integrally inserted into the second guide groove of the first knock member 31 and the first guide groove of the second knock member 32. As shown in fig. 7, the user presses the pressing head 40 to move along the length direction of the pen body 10, so as to drive the first pressing member 31 to move until the third inclined tooth 311 of the first pressing member contacts with the inclined surface of the second inclined tooth 321 of the second pressing member 32, and since the guide rail 14 is in the first guide groove of the second pressing member 32, the rotational movement of the second pressing member 32 is limited, so that the first pressing member 31 drives the second pressing member 32 to move along the guide rail 14, the second pressing member 32 drives the pen core 20 to move until the pen tip 21 partially protrudes out of the hollow portion 11, and the first elastic member 50 and the second elastic member 60 are both pressed to be in a compressed state. The guide rail 14 will gradually disengage from the first guiding groove of the second snap member 32 during the downward movement of the second snap member 32, and after the second snap member 32 loses the steering limitation of the guide rail 14, the second helical tooth 321 of the second snap member 32 starts to perform a rotational movement, and at the same time, the guide rail 14 moves along the slope of the second helical tooth 321 until the edge of the guide rail moves to the dead, and at this time, the third helical tooth 311 is just in a position contacting with the second helical tooth 321. As shown in fig. 5, when the user releases the pressing head 40, the pressing head 40 automatically rebounds back to the original position under the elastic action of the first elastic member 50, so that the position of the pressing head 40 remains fixed and cannot be shaken, but the guide rail 14 limits the second pressing member 32 to the first position, and blocks the pen core 20 from rebounding under the action of the second elastic member 60, so that the pen tip 21 remains extended, and the pressing pen is in the writing state.

After the use of the knock type pen is finished, the user presses the knock head 40 again to move along the length direction of the pen body 10, so as to drive the first knock member 31 to move until the third bevel 311 of the first knock member 31 contacts with the bevel of the second bevel 321 of the second knock member 32, as shown in fig. 8, the first knock member 31 presses the second knock member 32, the guide rail 14 is separated from the second knock member 32, so that the second knock member 32 has no rotation limitation, the second knock member 32 rotates simultaneously with the pressing of the first knock member 31, the guide rail 14 gradually slides down along the second bevel 321 into the guide groove of the second knock member 32, and the third bevel 311 rotates to a next preparation position. When the pressing head 40 is released, the pressing head 40 automatically rebounds to the original position under the elastic action of the first elastic member 50, so that the position of the pressing head 40 is kept fixed and cannot be shaken randomly, the second pressing member 32 has no radial limitation of the guide rail 14, the second elastic member 60 does not rebound under the pressure force, the pen core 20 rebounds to the original position under the action of the second elastic member 60, and the pen tip 21 is accommodated in the hollow part (i.e. in a non-writing state).

In one embodiment, referring to fig. 3 and 4, the knock-type pen 100 further comprises a clip 70, the clip 70 being disposed on a side of the body facing away from the nib 21. The pen clip 70 can be in a certain pattern, for example, the pattern of numbers 0-9 or letters A-Z, etc., so that the appearance selection of the product is increased, and the user experience is improved.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

The disclosure of this patent document contains material which is subject to copyright protection. The copyright is owned by the copyright owner. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the patent and trademark office official records and records.

Claims

1. A knock-type pen, comprising:

the pen body is internally provided with a hollow part penetrating along the length direction of the pen body, and the inner wall of the pen body is provided with a limiting structure;

2. The knock type pen according to claim 1, wherein said position-limiting structure is a position-limiting protrusion formed by protruding an inner wall of said pen body.

3. The knock type pen according to claim 2, wherein said stopping protrusion has a ring-shaped configuration.

4. The knock type pen according to claim 1, further comprising a knock head, wherein the knock mechanism further comprises a second end opposite to the first end, the second end of the knock mechanism abutting the knock head, the knock head at least partially protruding from the hollow portion; the pressing head moves along the length direction of the pen body to drive the pressing mechanism to move, so that the pressing type pen is switched between the writing state and the non-writing state.

5. The knock type pen according to claim 4, further comprising a first elastic member, wherein the inner wall of the pen body is further provided with a position-limiting portion, a first end of the first elastic member abuts against the knock head, and a second end of the elastic member abuts against the position-limiting portion.

6. The knock type pen according to claim 5, wherein said position-limiting portion comprises a position-limiting boss formed by the protrusion of the inner wall of said pen body and an annular wall formed by said position-limiting boss extending toward the direction of said knock head, said first elastic member is abutted against said position-limiting boss, and said first elastic member is located between said annular wall and the inner wall of said pen body.

7. The knock pen according to claim 6, wherein said knock mechanism is located within said annular wall.

8. The knock-type pen according to claim 4, wherein said knock mechanism includes a first knock member and a second knock member cooperating with said first knock member; the inner wall of the pen body is provided with a limiting piece in limiting fit with the second pressing piece;

9. The knock-type pen according to claim 8, wherein said retainer comprises a plurality of rails, one end of said rails near said pen core being provided with first helical teeth; the guide rails are arranged on the inner wall of the pen body at intervals along the circumferential direction of the pen body;

10. The knock-type pen according to claim 1, wherein said cartridge further comprises an ink reservoir, said nib portion being connected to an end of said ink reservoir remote from said knock mechanism; the pressing type pen further comprises a second elastic piece sleeved on the pen core, one end of the elastic piece is abutted to the ink storage tube, and the other end of the second elastic piece is abutted to the inner wall of the pen body.

11. The knock type pen according to claim 1, wherein the pen body comprises a first barrel and a second barrel detachably connected.