CN222819804U - Inverted self-locking pen - Google Patents

Abstract

This patent provides an inverted self-locking pen, characterized in that it includes: a pen core; a shell; a self-locking trigger mechanism; the self-locking trigger mechanism of the pen is in an unlocked state when the pen is in a normal writing state, and pressing the self-locking trigger mechanism can make the pen core extend or retract from the front end of the shell; the self-locking trigger mechanism of the pen is in a locked state when the pen is inverted, and pressing the self-locking trigger mechanism cannot make the pen core extend or retract from the front end of the shell. The pen core contains a reversible thermochromic water-based ink composition, and the reversible thermochromic water-based ink composition includes a reversible thermochromic microcapsule pigment. The pen also includes a friction body, which is arranged at the rear end of the self-locking trigger mechanism, and the friction body uses an elastic and soft material to erase the handwriting produced by the pen core. When erasing written characters, the friction body is pressed downward on the paper surface and is in a locked state, so that the written characters can be easily erased. The pen can be a single-core pen or a multi-core pen.

Description

Inverted self-locking pen

Technical Field

The patent relates to stationery field, especially relates to an inversion self-locking pen tool.

Background

With the continuous development of the market, the replaceable core pressing pen is gradually favored by consumers due to the unique advantages of the replaceable core pressing pen. The design of the pen allows a user to change writing colors by switching the pen core through simple operation under the condition of not changing the whole pen holder, thereby greatly prolonging the service life of the pen and reducing waste. Part of cartridges in the market use cartridges of reversible thermochromic aqueous ink compositions which can form handwriting which changes with temperature, i.e. change the color of the system by heating or cooling. The color change of the existing thermochromic system is mostly reversible, namely, the color of the system changes when the temperature is increased (or decreased) to a certain temperature, and the color of the system can be recovered immediately when the temperature is decreased below the temperature (or the temperature is increased upwards), or the color change of the system is completely irreversible, and once the temperature change system changes, the color of the system can not be recovered. The above-mentioned system cannot be directly applied to the erasable ink system because as the erasable ink, the writing color is not expected to recover immediately after the color is lost when the temperature is raised, and the ink is required to be normally written by re-coloring in a certain environment in consideration of the high temperature possibly generated during transportation. Therefore, there is usually provided a friction body corresponding to the ink composition, which when brought into contact with the ink composition writing on the writing surface, causes the reversible thermochromic aqueous ink composition to change color by friction to generate heat.

Most friction bodies are arranged on the pen cap at the rear end of the pressing pen body, the pen cap can be pressed upwards during writing, and when the written characters are erased, the pen cap is pressed downwards on the paper surface, but the pressing rod is sunk, so that the erasing is difficult. It is therefore desirable to design a structure capable of easily erasing the reversible thermochromic ink composition.

Disclosure of utility model

In order to easily erase the reversible thermochromic ink composition, the present patent provides the following technical solutions:

The first aspect provides an inverted self-locking pen tool which comprises a pen core, a shell and a self-locking touch mechanism, wherein the self-locking touch mechanism is in an unlocking state under a normal writing state, the pen tool can be pressed by pressing the self-locking touch mechanism to enable the pen core to extend or retract from the front end of the shell, the self-locking touch mechanism is in a locking state when the pen tool is inverted, and the pen tool cannot extend or retract from the front end of the shell by pressing the self-locking touch mechanism.

Further, the pen core contains a reversible thermochromic aqueous ink composition, and the reversible thermochromic aqueous ink composition comprises a reversible thermochromic microcapsule pigment.

Further, the pen further comprises a friction body, and the friction body is arranged at the rear end of the self-locking touch mechanism.

Further, the friction body is made of elastic soft materials, and the elastic soft materials comprise one of rubber, elastomer, plastic foam, foam polyurethane and silica gel.

Further, the pen is a single-core pen, the self-locking touch mechanism can enable the pen core to be switched between extending and retracting from the front end of the shell, or the pen is a multi-core pen, the pen comprises a pressing body connected with the pen core, the pressing body can enable the pen core to extend from the front end of the shell, and the self-locking touch mechanism can enable the pen core to retract from the front end of the shell.

Further, the pen is a multi-core pen, the self-locking touch mechanism comprises a release rod, a self-locking base, balls and a hammer, the release rod is provided with a base limit rib position, a ball limit rib position and a release rod top, the self-locking base comprises a release rod through hole, a first ball jack, a second ball jack and a reset spring mounting part, and the number of the balls is 1, 2, 3, 4, 5 or 6.

Further, the hammer has an in-hammer receptacle that nests into the self-locking base and forms an annular cavity.

Further, the self-locking touch mechanism also comprises a reset spring and a touch end seat.

Further, touch the end seat and include relieving excellent top jack, reset spring seat and friction body seat.

In addition, the release rod can move downwards along the axial direction under the action of force in the unlocking state, the release rod extrudes the ball to move towards the annular cavity, the hammer is propped against the touch end seat under the action of gravity in the locking state, and the ball is fixed under the actions of the hammer, the release rod and the self-locking base.

This patent has following beneficial effect:

The inverted self-locking pen is characterized by comprising a pen core, a shell and a self-locking touch mechanism, wherein the self-locking touch mechanism is in an unlocking state under a normal writing state, the pen core can extend or retract from the front end of the shell by pressing the self-locking touch mechanism, the self-locking touch mechanism is in a locking state when the pen is inverted, and the pen core cannot extend or retract from the front end of the shell by pressing the self-locking touch mechanism. The cartridge contains a reversible thermochromic aqueous ink composition including a reversible thermochromic microcapsule pigment. The pen also comprises a friction body which is arranged at the rear end of the self-locking touch mechanism, and the friction body uses elastic soft materials for erasing handwriting generated by the pen core. When the written characters are erased, the friction body is pressed downwards on the paper surface and is in a locking state, so that the written characters can be easily erased. The pen tool can be a single-core pen tool or a multi-core pen tool.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present patent, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present patent and should not be considered as limiting the scope, and that other related drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an exploded view of the operational assembly of the present patent;

FIG. 2 is a schematic perspective view of a release rod according to the present invention;

FIG. 3 is a self-locking device of the present patent a three-dimensional structure schematic diagram of the base;

FIG. 4 is a schematic view of the release bar and solid base assembly of the present patent;

FIG. 5 is a diagram of the assembly process of the self-locking trigger mechanism of the present patent;

FIG. 6 is an assembled schematic view of the self-locking trigger mechanism of the present patent;

FIG. 7 is an exploded view of the friction mechanism of the present patent;

FIG. 8 is a diagram of the assembly process of the self-locking trigger mechanism and friction mechanism of the present patent;

FIG. 9 is a cross-sectional view of the self-locking trigger mechanism and friction mechanism assembly process of the present patent;

FIG. 10 is a cross-sectional view of the self-locking trigger mechanism and friction mechanism with the ball of the present patent in a first position;

FIG. 11 is a cross-sectional view of the self-locking trigger mechanism and friction mechanism of the present invention when the ball is changed from the first position to the second position;

FIG. 12 is an enlarged partial cross-sectional view of portion A of FIG. 11 of the present patent;

FIG. 13 is a cross-sectional view of the self-locking trigger mechanism and friction mechanism with the ball of the present patent in a second position;

FIG. 14 is an enlarged partial cross-sectional view of portion B of FIG. 13 of the present patent;

FIG. 15 is a cross-sectional view of the self-locking trigger mechanism and friction mechanism with the ball of the present patent in a third position;

fig. 16 is an enlarged partial cross-sectional view of portion C of fig. 15 of this patent.

Wherein reference numerals are as follows:

1 operating Assembly

2 Push body

3 Casing body

31 Guide opening

32 Fixing hole

4 Rod sleeve

5 Pen clip

51 Clip cap

52 Clip body

6 Self-locking touch mechanism

61 Release rod

611 Base limit rib position

612 Ball limiting rib position

613 Release bar top

62 Self-locking base

621 Release rod through hole

622 First ball socket

623 Second ball socket

624 Reset spring mounting portion

63 First ball

64 Second ball

65 Hammer

651 Hammer insert hole

66 Annular cavity

67 Reset spring

68 Touch end seat

681 Releasing rod top jack

682 Reset spring seat

683 Friction body seat

7 Friction body

Detailed Description

The detailed features and advantages of the present patent are described in detail in the following detailed description, which is sufficient to enable those skilled in the art to understand the technical disclosure of the patent and to practice it, and the related objects and advantages of the patent are readily understood by those skilled in the art from the description, claims and drawings disclosed herein.

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

Referring to fig. 1, the replaceable refill pen provided by the present application may include a refill (not shown), a front half of a pen holder, and an operation assembly 1 as a rear half of the pen holder, wherein the operation assembly 1 includes a pressing body 2, a housing 3, a holder sleeve 4, a clip 5, a self-locking touch mechanism 6, and a friction body 7.

Wherein, the front end of the pressing body 2 is connected with the pen core, the rear side of the shell 3 is provided with a guiding opening 31, the front side of the rod sleeve 4 is provided with a limiting opening 41 corresponding to the guiding opening 31, and the guiding opening 31 and the limiting opening 41 are combined to form a window, so that the pressing body 2 is guided to slide in the window, and the pen core connected to the pressing body 2 is driven to extend or shrink from the front end of the front half part of the pen holder.

The pen clip 5 is inserted into the rear side of the rod sleeve 4 and has a corresponding screw structure on the rear side of the housing 3 for assembly and fixation with the housing 3. The pen clip 5 comprises a clip cap 51 and a clip body 52 formed by extending downwards from the outer side of the top end of the clip cap 51, and a connecting part between the clip cap 51 and the clip body 52 is embedded into the rear side of the rod sleeve 4.

The self-locking touch mechanism 6 can be embedded into the opening of the pen clip 5 to seal the pen clip 5. Specifically, the self-locking trigger 6 passes through the sleeve 4, is fitted in the fixing hole 32 and serves to close the housing 3, thereby limiting the movement of the sleeve 4 in two positions.

The sleeve 4 is movable relative to the housing 3 in a range of closed positions (sleeve 4 moved to the forward position) and open positions (sleeve 4 moved to the rearward position) on the rear side of the housing 3, and is movably connected without being disconnected from the housing 3.

When the rod sleeve 4 moves to the closed position, the rod sleeve 4 is connected with the shell 3, the limiting opening 41 is matched with the guide opening 31 to limit the guide opening 31, the pen core in the shell 3 is blocked and cannot be taken out from the shell 3, when the rod sleeve 4 moves to the first position, the limiting opening 41 is separated from the guide opening 31, the blocked pen core is unlocked, a consumer can take out the pressing body 2 and the pen core connected with the pressing body from the limiting opening 41, and a new pen core or the pressing body 2 is inserted, so that replacement is realized.

The number of the balls in this embodiment is 2, the self-locking touch mechanism 6 includes a release rod 61, a self-locking base 62, a first ball 63, a second ball 64, a hammer 65, a return spring 67, and a touch end seat 68, the release rod 61 is a bar-shaped structure with a limit rib, the self-locking base 62 and the hammer 65 are hollow cylinder structures with different diameters, and the top 613 of the release rod penetrates the self-locking base 62 and is connected with the touch end seat 68. The hammer 65 has an in-hammer receptacle 651, the in-hammer receptacle 651 nesting the self-locking base 62 and forming an annular cavity 66.

Referring to fig. 2, the release bar 61 includes a base limit rib position 611 and a ball limit rib position 612, wherein the base limit rib position 611 and the ball limit rib position 612 are annular embedded grooves arranged along the circumferential direction of the release bar 61, the base limit rib position 611 is used for limiting the lowest drop point of the self-locking base 62, and the ball limit rib position 612 is used for accommodating the dropped first ball 63 and second ball 64. The maximum diameter of the release rod 61 body is lower than the minimum diameter of the self-locking base 62 so that the release rod 61 is easily penetrated, the diameter of the release rod top 613 is smaller than the diameter of the release rod 61 body, and the diameter of the release rod top 613 is irregularly varied.

Referring to fig. 3, the self-locking base 62 is a hollow cylinder structure with the same inner diameter and different outer diameters, a release rod penetrating hole 621 penetrating the release rod 61 is formed in the middle, a first ball insertion hole 622 and a second ball insertion hole 623 are formed in the wall of the self-locking base 62 in a opposite manner, the diameters of the first ball insertion hole 622 and the second ball insertion hole 623 are slightly larger than those of the first ball 63 and the second ball 64, a large-diameter disc is arranged at the bottom of the self-locking base 62 and used for limiting the bottom of the hammer 65, and a reset spring mounting portion 624 is arranged at the top of the self-locking base 62.

The hammers 65 are hollow cylindrical structures with the same outer diameter and the inner diameter being changed from small to large, the middle is provided with a hammer inner inserting hole 651 for nesting the self-locking base 62, the inner diameter of the rear section of the hammer inner inserting hole 651 is larger than the inner diameter of the front section of the hammer inner inserting hole 651, and the inner diameter of the front section of the hammer inner inserting hole 651 is slightly larger than the outer diameter of the self-locking base 62, so that the hammers 65 can be nested on the self-locking base 62.

Referring to fig. 4-6, the release rod 61 penetrates the self-locking base 62 until the disc of the self-locking base 62 abuts against the base limiting rib 611, and at this time, the ball limiting rib 612 is almost in the same horizontal plane with the first ball insertion hole 622 and the second ball insertion hole 623. The first and second beads 63, 64 are placed into the first and second bead receptacles 622, 623, respectively, with the beads almost fully received by the bead receptacles, with the first and second beads 63, 64 in the first position. Finally, the hammer 65 is sleeved on the self-locking base 62, the front section of the hammer 65 abuts against the disc of the self-locking base 62, the starting point of the rear section of the hammer insertion hole 651 is lower than that of the first ball insertion hole 622 and the second ball insertion hole 623, and at the moment, the annular cavity 66 is formed between the rear section of the hammer insertion hole 651 and the wall of the self-locking base 62, so that the first ball 63 and the second ball 64 can displace in the annular cavity 66.

Referring to fig. 7, the trigger end seat 68 includes a release rod jack 681, a reset spring seat 682 and a friction body seat 683, the trigger end seat 68 is a hollow cylinder structure, the hollow portion is the release rod jack 681, and the rear end of the trigger end seat 68 is provided with a convex friction body seat 683. One end of the return spring 67 is connected with the return spring mounting part 624 of the self-locking base 62, the other end is connected with the return spring seat 682 of the movable end seat 68, the return spring 67 is used for resetting the pressed friction body 7 and the touch end seat 68, and the release rod 61 penetrates through the return spring 67 and is jogged and fixed with the release rod jacking jack 681, and the friction body 7 is connected with the friction body seat 683 through threads. The friction body 7 is internally provided with an internally threaded cavity, and can be screwed with a friction body seat 683 provided with external threads. The release rod top insertion hole 681 is provided with a snap mechanism such that the release rod top 613 enters the release rod top insertion hole 681 to be fixed by the snap mechanism.

Referring to fig. 8 and 9, the release rod 61 sequentially penetrates through the self-locking base 62 and the return spring 67 and is embedded into the contact end seat 72, and at this time, the friction body 7 and the self-locking contact mechanism 6 can be engaged into the rod sleeve 4. The force applied to the friction body 7 is transferred to the friction body seat 683, the friction body seat 683 transfers the force to the release rod top insertion hole 681 propped against the return spring 67, at this time, the return spring 67 is deformed by the force and transfers the force to the self-locking base 62 propped against the other end, and after the force is lost, the return spring 67 restores the deformation to restore the touch end seat 68 and the friction body 7 to the position before the force is applied. The self-locking base 62 is forced to displace, the first ball jack 622, the second ball jack 623 and the ball limiting rib 612 are changed from the same horizontal plane to different horizontal planes, so that the first ball 63 and the second ball 64 which are originally almost accommodated by the first ball jack 622, the second ball jack 623 and the ball limiting rib 612 are extruded and moved into the annular cavity 66, and the corresponding displacement of the release rod 61 touches the switch inside the rod sleeve 4 to retract the extended pen refill. Thereby realizing the effect of retracting the pen core by pressing the friction body 7.

Referring to fig. 10 to 16, three refills containing the reversible thermochromic ink composition are provided in the inverted self-locking pen in the present embodiment, and three pressing bodies 2 are provided so that the three refills are individually extended. The inverted self-locking pen in the embodiment comprises a writing unlocking state and an inverted self-locking state, the pen is in the unlocking state in the state of being vertically placed, the friction body 7 is pressed to enable the release rod 61 to displace and touch the switch inside the rod sleeve 4 to enable the extended pen core to shrink by one key, the pen is in the self-locking state in the state of being inversely placed, the friction body 7 is applied with an acting force to enable the release rod 61 to displace, and the inverted practical friction body 7 is convenient to erase writing handwriting.

Specifically, during a specific change process of the writing tool in the writing unlocking state, the acting force received by the friction body 7 is transferred to the friction body seat 683, the friction body seat 683 transfers the force to the release rod top insertion hole 681 abutting against the return spring 67, the release rod 61 embedded in the release rod top insertion hole 681 is subjected to downward displacement, meanwhile, the return spring 67 is subjected to the action force, is deformed from an extension state to a compression state and transfers the action force to the self-locking base 62 abutting against the other end, and after the action force is lost, the return spring 67 returns to the deformation to restore the touch end seat 68 and the friction body 7 to the position before the action force. The self-locking base 62 is subjected to downward force, and the disk of the self-locking base 62 is blocked by q611 and cannot continue to displace, so that the disk of the self-locking base 62 obtains upward interaction force. The release rod 61 is continuously displaced downwards after being subjected to pressing force, so that the first ball insertion hole 622, the second ball insertion hole 623 and the ball limiting rib position 612 are changed from the same horizontal plane to different horizontal planes, the first ball 63 and the second ball 64 which are almost accommodated by the first ball insertion hole 622, the second ball insertion hole 623 and the ball limiting rib position 612 are pressed and moved into the annular cavity 66 by the release rod 61 which moves downwards, the first ball 63 and the second ball 64 are positioned at the second position, and the corresponding displacement of the release rod 61 touches the switch inside the rod sleeve 4 to retract the extending pen refill, so that the effect of retracting the pen refill by pressing the friction body 7 through one key is realized.

Specifically, the pen has a specific change process in the inverted self-locking state, the first ball jack 622, the second ball jack 623 and the ball limiting rib 612 are in different horizontal planes in the inverted initial state, and the first ball 63 and the second ball 64 are extruded in the first ball jack 622, the second ball jack 623 and the annular cavity 66. When the friction body 7 contacts with the paper surface to erase handwriting, the contact surface is subjected to reverse acting force, the reset spring 67 is stressed to be changed into an extension state from a compression state, the self-locking base 62 is pushed to displace upwards, at the moment, the first ball 63 and the second ball 64 gradually leave the annular cavity 66 until the first ball jack 622, the second ball jack 623 and the ball limiting rib 612 are changed from different horizontal planes to the same horizontal plane, the first ball 63 and the second ball 64 are accommodated into the joint of the first ball jack 622, the second ball jack 623 and the ball limiting rib 612 again, the hammer 65 in an inverted state is influenced by gravity to be abutted against the touch end seat 72, namely the inner wall of the hammer 65, the first ball jack 622, the second ball jack 623 and the ball limiting rib 612 can fix the first ball 63 and the second ball 64, and the first ball 63 and the second ball 64 are in a third position, so that the friction body 7 is limited to displace upwards, and the effect that the inverted friction body 7 is locked and cannot displace is achieved.

The reversible thermochromic aqueous ink composition used for the pen core in this example includes a reversible thermochromic microcapsule pigment, and further includes water, a water-soluble organic solvent, a comb-type polymer dispersant having an antelope group in a side chain, an organic nitrogen-sulfur compound, and a water-soluble resin. The reversible thermochromic microcapsule pigment contains a reversible thermochromic composition comprising (A) an electron donating organic compound, (B) an electron accepting compound, and (C) a reaction medium for determining the occurrence temperature of the color development reaction of the above-mentioned (A) and (B).

Specifically, a microcapsule pigment suspension containing a reversible thermochromic composition having color memory, the reversible thermochromic composition comprising 3.0 parts of 1, 3-dimethyl-6-diyl amino fluoran as component (a), 3.0 parts of 4,4'- (2-ethyl hexane-1, 1-diyl) diphenol as component (B), 5.0 parts of 2, 2-bis (4' -hydroxyphenyl) -hexafluoropropane, and 50.0 parts of 4-benzyloxyphenyl ethyl decanoate as component (C) was obtained.

Further, the microcapsule pigment suspension of the reversible thermochromic composition is centrifuged to separate the reversible thermochromic microcapsule pigment. The average particle diameter was 1.1um, the complete color fading temperature was 60℃and the complete color development temperature was-30℃and the color change from orange to colorless was effected by the temperature change.

Further, 25.0 parts of a reversible thermochromic microcapsule pigment which is cooled to a color development temperature of-30 ℃ or lower in advance, 0.5 parts of a comb-shaped polymer dispersant (manufactured by Lubrizol Japan ltd. Under the trade name Solsperse 43000), 1.0 parts of an organic nitrogen sulfur compound (manufactured by Hokko Chemical Industry co.; ltd. Under the trade name: a mixture of Hokuside R-150,2-methyl-4-isothiazolin-3-one and 5-chloro-2-methyl-4-isothiazolin-3-one), 0.5 parts of polyvinyl alcohol, 35.0 parts of glycerin, 0.02 parts of a defoaming agent (silicone system), and 37.98 parts of water were prepared and mixed to obtain a thermochromic aqueous ink composition.

Further, the pH of the thermochromic aqueous ink composition was 7.00, and the surface tension was 39.8mN/m.

The friction body 7 is brought into contact with the handwriting written with the thermochromic aqueous ink composition, and the reversible thermochromic microcapsule pigment is brought into close contact with the surface to be written on the long diameter side (maximum outer diameter side), so that the handwriting is densely oriented and adhered, and the color development of the handwriting is high in concentration. The microcapsule pigment is slightly elastically deformed into a shape for alleviating external force against the external force generated when the handwriting is rubbed by the rubbing body 7 such as a rubber, so that the destruction of the wall film of the microcapsule is suppressed, and the handwriting can be effectively visualized without impairing the thermochromic function.

The friction body 7 may be an elastomer or a plastic foam which has a rich elastic feel and can generate friction heat by moderate friction during friction, or may be a plastic molded body, stone, wood, metal, or cloth. In addition, rubber can be used for rubbing handwriting. The friction body 7 selected in this embodiment is an elastomer.

The elastomer of the friction body 7 may be silicone resin or SEBS resin (styrene-ethylene-butadiene-styrene block copolymer), and SEBS resin is selected in this embodiment.

It should be noted that, as shown in fig. 1, the inverted self-locking pen tool provided by the application may be a multi-core pen tool, in this embodiment, three pen cores are provided, each pen core is respectively connected to a corresponding pressing body 2, and the corresponding pen cores are in a core-out state by pressing the pressing body 2.

In addition, the inverted self-locking pen tool can also be a single-core pen tool, namely, the pen tool is only provided with a single pen core, and a person skilled in the art can correspondingly set the pen tool 1 with the replaceable pen core according to specific application scenes.

It is understood that other internal structures of the multi-core pen and the single-core pen (such as the arrangement and matching manner of the self-locking trigger mechanism 6, the friction body 7, etc.) are well known to those skilled in the art, and will not be described herein.

Terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", and the like, are used in the specification of this patent to describe various example structural parts and components of this patent, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the embodiments disclosed in this patent may be arranged in different directions, these directional terms are merely illustrative and should not be construed as limiting, such as "upper" and "lower" are not necessarily limited to directions in which the direction of gravity is opposite or coincident.

In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in detail.

Moreover, any combination of the various embodiments of the present patent may be made without departing from the spirit of the present patent, which should also be considered as disclosed in the present patent.

Claims (10)

1. An inverted self-locking pen, comprising:

a pen core;

A housing;

a self-locking touch mechanism;

The self-locking touch mechanism is in an unlocking state under the normal writing state of the pen, and the pen core can be pushed and extend or retract from the front end of the shell by pressing the self-locking touch mechanism;

The self-locking touch mechanism is in a locking state when the pen is inverted, and the pen refill cannot be pushed and cannot extend or retract from the front end of the shell by pressing the self-locking touch mechanism.

2. The inverted self-locking pen according to claim 1, wherein said cartridge contains a reversible thermochromic aqueous ink composition;

the reversible thermochromic aqueous ink composition includes a reversible thermochromic microcapsule pigment.

3. The inverted self-locking pen according to claim 1, further comprising a friction body disposed at a rear end of the self-locking trigger mechanism.

4. The inverted self-locking pencil of claim 3, wherein the friction body is a resilient soft material comprising one of rubber, elastomer, plastic foam, foamed polyurethane and silicone.

5. The inverted self-locking pencil of claim 1, wherein the pencil is a single-core pencil, the self-locking trigger mechanism being operable to switch the pencil lead between extending and retracting from the front end of the housing, or

The pen tool is a multi-core pen tool and comprises a pressing body connected with the pen core, the pressing body can enable the pen core to extend out of the front end of the shell, and the self-locking touch mechanism can enable the pen core to retract from the front end of the shell.

6. The inverted self-locking pencil of claim 5, wherein the pencil is the multicore pencil, the self-locking touch mechanism comprises a release rod, a self-locking base, a ball and a hammer, the release rod is provided with a base limit rib position, a ball limit rib position and a release rod top, and the self-locking base comprises a release rod through hole, a first ball jack, a second ball jack and a reset spring mounting part;

the number of the balls is 1, 2, 3, 4, 5 or 6.

7. The inverted self-locking pencil of claim 6 wherein the hammer has an in-hammer socket that nests the self-locking base and forms an annular cavity.

8. The inverted self-locking pen tool according to claim 7, wherein said self-locking trigger mechanism further comprises a return spring, a trigger end seat.

9. The inverted self-locking pencil of claim 8, wherein the trigger end mount comprises a release rod top socket, a reset spring mount, and a friction body mount.

10. The inverted self-locking pencil of claim 8, wherein the release rod is capable of being forced downward in an axial direction in an unlocked state, the release rod compressing the ball to move toward the annular cavity;

In a locking state, the hammer is propped against the touch end seat under the action of gravity, and the ball is fixed under the actions of the hammer, the release rod and the self-locking base.