Inverted self-locking pen

Abstract

The utility model provides an inverted self-locking pen which is characterized by comprising a pen refill, a pen cap and a pen cap, a housing; a self-locking trigger mechanism; when the pen is in a normal writing state, the self-locking touch mechanism is in an unlocking state, and the refill can stretch out or retract from the front end of the shell by pressing the self-locking touch mechanism; when the pen is inverted, the self-locking touch mechanism is in a locked state, and the refill cannot stretch out or retract from the front end of the shell by pressing the self-locking touch mechanism. The refill contains a reversible thermochromic aqueous ink composition, and the reversible thermochromic aqueous ink composition comprises a reversible thermochromic microcapsule pigment. The pen further comprises a friction body, the friction body is arranged at the rear end of the self-locking touch mechanism, and the friction body is made of elastic soft materials and used for erasing handwriting generated by the pen refill. And when the written characters are erased, the friction body is pressed on the paper surface downwards and is in a locked state, so that the written characters can be erased easily. The pen can be a single-core pen or a multi-core pen.

Description

Technical Field

[0001] This patent relates to the field of stationery, and in particular to an inverted self-locking pen. Background Art

[0002] With the continuous development of the market, replaceable refills are gradually favored by consumers due to their unique advantages. The design of this type of pen allows users to switch refills and change writing colors through relatively simple operations without replacing the entire pen barrel, thereby greatly extending the service life of the pen and reducing waste. Some refills on the market use reversible thermochromic water-based ink composition refills. Reversible thermochromic water-based ink compositions can form handwriting that changes with temperature, that is, the color of the system is changed by heating or cooling. The color change of existing thermochromic systems is mostly reversible, that is, the color of the system changes when it is raised (or lowered) to a certain temperature, and the color of the system will immediately recover once the temperature drops below this temperature (or rises above this temperature); or the color change of the system is completely irreversible, and once the temperature changes and the color of the system changes, it can no longer be restored. The above systems cannot be directly applied to erasable ink systems, because as erasable ink, the color of the writing disappears when the temperature rises, and it is not desired to restore the color immediately once the temperature drops; at the same time, considering that the high temperature generated during transportation may cause the ink to fade, it is necessary to restore the color in a certain environment so that it can be written normally. Therefore, a friction body corresponding to the ink composition is usually provided. When the friction body contacts the writing of the reversible thermochromic water-based ink composition on the writing surface, heat is generated by friction, causing the reversible thermochromic water-based ink composition to change color.

[0003] Most friction bodies are arranged on the cap at the rear end of the push pen body. When writing, the cap can be pressed upward. When erasing written characters, the cap is pressed down on the paper, but the push rod sinks, making it difficult to erase. Therefore, it is necessary to design a structure that can easily erase the reversible thermochromic ink composition. Utility Model Content

[0004] In order to easily erase the reversible thermochromic ink composition, this patent provides the following technical solutions:

[0005] A first aspect: an inverted self-locking writing instrument is provided, comprising: a refill; a shell; a self-locking trigger mechanism; the self-locking trigger mechanism is in an unlocked state when the writing instrument is in a normal writing state, and pressing the self-locking trigger mechanism can cause the refill to extend from or retract from the front end of the shell; when the writing instrument is inverted, the self-locking trigger mechanism is in a locked state, and pressing the self-locking trigger mechanism cannot cause the refill to extend from or retract from the front end of the shell.

[0006] Furthermore, the pen core contains a reversible thermochromic water-based ink composition; the reversible thermochromic water-based ink composition includes a reversible thermochromic microcapsule pigment.

[0007] Furthermore, the writing tool further comprises a friction body, which is arranged at the rear end of the self-locking trigger mechanism.

[0008] Furthermore, the friction body uses an elastic and soft material, and the elastic and soft material includes one of rubber, rubber, elastomer, plastic foam, foam polyurethane and silicone.

[0009] Furthermore, the pen is a single-core pen, and the self-locking trigger mechanism can make the pen core switch between extending and retracting from the front end of the shell; or the pen is a multi-core pen, and the pen includes a pressing body connected to the pen core, the pressing body can make the pen core extend from the front end of the shell, and the self-locking trigger mechanism can make the pen core retract from the front end of the shell.

[0010] Furthermore, the pen is a multi-core pen, and the self-locking trigger mechanism includes a release rod, a self-locking base, a ball and a hammer. The release rod is provided with a base limiting rib, a ball limiting rib and a release rod top. The self-locking base includes a release rod through hole, a first ball insertion hole, a second ball insertion hole, and a reset spring mounting part; the number of balls is 1, 2, 3, 4, 5 or 6.

[0011] Furthermore, the hammer has an inner hammer insertion hole, which is embedded in the self-locking base to form an annular cavity.

[0012] Furthermore, the self-locking trigger mechanism also includes a return spring and a trigger end seat.

[0013] Furthermore, the trigger end seat includes a release rod top socket, a return spring seat and a friction body seat.

[0014] Furthermore, in the unlocked state, the release rod can be forced to move downward in the axial direction, and the release rod squeezes the ball to move toward the annular cavity; in the locked state, the hammer is acted upon by gravity to resist the trigger end seat, and the ball is fixed by the hammer, the release rod, and the self-locking base.

[0015] This patent has the following beneficial effects:

[0016] Provided is an inverted self-locking writing instrument, characterized in that it comprises: a pen core; a shell; a self-locking trigger mechanism; the self-locking trigger mechanism is in an unlocked state when the writing instrument 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 is in a locked state when the writing instrument 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 writing instrument 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 writing instrument can be a single-core writing instrument or a multi-core writing instrument. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of this patent, the following is a brief introduction to the drawings required for use in the embodiment. It should be understood that the following drawings only show certain embodiments of this patent and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is an exploded view of the operating components of this patent;

[0019] Figure 2 This is a schematic diagram of the three-dimensional structure of the release rod of this patent;

[0020] Figure 3 This is a schematic diagram of the three-dimensional structure of the self-locking base of this patent;

[0021] Figure 4 This is a schematic diagram of the assembly of the release rod and the three-dimensional base of the present invention;

[0022] Figure 5 This is a diagram of the assembly process of the patented self-locking trigger mechanism;

[0023] Figure 6 This is a schematic diagram of the assembly of the self-locking trigger mechanism of the present patent;

[0024] Figure 7 This is an exploded diagram of the friction mechanism of this patent;

[0025] Figure 8 This is a diagram showing the assembly process of the patented self-locking trigger mechanism and friction mechanism;

[0026] Fig. 9 This is a cross-sectional view of the assembly process of the patented self-locking trigger mechanism and friction mechanism;

[0027] Fig.10This is a cross-sectional view of the self-locking trigger mechanism and the friction mechanism when the ball of the present invention is in the first position;

[0028] Fig.11 This is a cross-sectional view of the self-locking trigger mechanism and the friction mechanism when the ball of the present invention changes from the first position to the second position;

[0029] Fig.12 For this patent Fig.11 A partial enlarged cross-sectional view of the middle A part;

[0030] Fig.13 This is a cross-sectional view of the self-locking trigger mechanism and the friction mechanism when the ball of the present invention is located in the second position;

[0031] Fig.14 For this patent Fig.13 A partial enlarged cross-sectional view of the middle B section;

[0032] Fig.15 This is a cross-sectional view of the self-locking trigger mechanism and the friction mechanism when the ball of the present invention is located at the third position;

[0033] Fig.16 For this patent Fig.15 A partial enlarged cross-sectional view of section C in the middle.

[0034] The reference numerals are described as follows:

[0035] 1: Operation components

[0036] 2: Press the body

[0037] 3: Shell

[0038] 31: Guide port

[0039] 32: Fixing hole

[0040] 4: Rod sleeve

[0041] 5: Pen Clip

[0042] 51: Clip cap

[0043] 52: Clamp body

[0044] 6: Self-locking trigger mechanism

[0045] 61: Release Rod

[0046] 611: Base limit rib position

[0047] 612: Ball limit rib position

[0048] 613: Unlock the top of the rod

[0049] 62: Self-locking base

[0050] 621: Release rod through hole

[0051] 622: First ball socket

[0052] 623: Second ball socket

[0053] 624: Return spring installation part

[0054] 63: First Ball

[0055] 64: Second ball

[0056] 65: Hammer

[0057] 651: Hammer socket

[0058] 66: Annular cavity

[0059] 67: Return spring

[0060] 68: Touch terminal

[0061] 681: Unlock the rod top jack

[0062] 682: Return spring seat

[0063] 683: Friction body seat

[0064] 7: Friction body DETAILED DESCRIPTION

[0065] The detailed features and advantages of this patent are described in detail in the specific implementation method below, and the content is sufficient to enable any technical personnel in this field to understand the technical content of this patent and implement it accordingly. According to the description, claims and drawings disclosed in this specification, technical personnel in this field can easily understand the relevant purposes and advantages of this patent.

[0066] In order to make the purpose, technical solutions and advantages of this patent clearer, the implementation method of this patent will be further described in detail below in conjunction with the accompanying drawings.

[0067] Please refer to Figure 1 The replaceable refill pen provided in the present application may include: a refill (not shown in the figure), a front half of a pen barrel and an operating component 1 which is the back half of the pen barrel. The operating component 1 includes: a pressing body 2, a shell 3, a rod sleeve 4, a pen clip 5, a self-locking trigger mechanism 6 and a friction body 7.

[0068] Among them, the front end of the pressing body 2 is connected to the pen core, a guide opening 31 is provided on the rear side of the shell 3, and a limiting opening 41 corresponding to the guide opening 31 is provided on the front side of the rod sleeve 4. The guide opening 31 and the limiting opening 41 are combined to form a window, thereby guiding the pressing body 2 to slide therein, thereby driving the pen core connected to the pressing body 2 to extend or retract from the front end of the front half of the pen shaft.

[0069] The pen clip 5 is embedded in the rear side of the rod sleeve 4 and has a spiral structure corresponding to the rear side of the housing 3, and is used to be assembled and fixed with the housing 3. The pen clip 5 includes a clip cap 51 and a clip body 52 extending downward from the outer side of the top of the clip cap 51, and the connecting part between the clip cap 51 and the clip body 52 is embedded in the rear side of the rod sleeve 4.

[0070] The self-locking trigger mechanism 6 can be embedded in the opening of the pen clip 5 to close the pen clip 5. Specifically, the self-locking trigger mechanism 6 passes through the rod sleeve 4, is assembled in the fixing hole 32 and is used to close the housing 3, thereby limiting the movement of the rod sleeve 4 in two positions.

[0071] The rod sleeve 4 moves relatively within the range of a closed position (the rod sleeve 4 moves to a forward position) and an open position (the rod sleeve 4 moves to a rearward position) on the rear side of the housing 3 , and can be movably connected but not separated from the housing 3 .

[0072] When the rod sleeve 4 moves to the closed position, the rod sleeve 4 is connected to the shell body 3, and the limiting opening 41 cooperates with the guiding opening 31 to limit the guiding opening 31, thereby blocking the pen refill in the shell body 3 and preventing it from being taken out from the shell body 3; when the rod sleeve 4 moves to the first position, the limiting opening 41 is separated from the guiding opening 31, and the blocking of the pen refill is released. The consumer can take out the pressing body 2 and the pen refill connected to it from the limiting opening 41, and insert a new pen refill or the pressing body 2 to achieve replacement.

[0073] In this embodiment, there are two balls, and the self-locking trigger mechanism 6 includes a release rod 61, a self-locking base 62, a first ball 63, a second ball 64, a hammer 65, a reset spring 67, and a trigger end seat 68. The release rod 61 is a long rod-shaped structure with a limited rib, and the self-locking base 62 and the hammer 65 are hollow cylindrical structures with different diameters. The top 613 of the release rod passes through the self-locking base 62 and is connected to the trigger end seat 68. The hammer 65 has a hammer inner plug hole 651, which is embedded in the self-locking base 62 and forms an annular cavity 66.

[0074] Please refer to Figure 2 The release rod 61 includes a base limiting rib 611 and a ball limiting rib 612. The base limiting rib 611 and the ball limiting rib 612 are annular embedded grooves arranged along the circumference of the release rod 61. The base limiting rib 611 is used to limit the lowest drop point of the self-locking base 62, and the ball limiting rib 612 is used to accommodate the first ball 63 and the second ball 64 that fall into. 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 can easily penetrate. 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 changes irregularly.

[0075] Please refer to Figure 3The self-locking base 62 is a hollow cylindrical structure with the same inner diameter and different outer diameters. In the middle is a release rod through hole 621 through which the release rod 61 passes. The first ball insertion hole 622 and the second ball insertion hole 623 are opposite to each other on the wall of the self-locking base 62. The apertures of the first ball insertion hole 622 and the second ball insertion hole 623 are slightly larger than the diameters of the first ball 63 and the second ball 64. A large-diameter disc is provided at the bottom of the self-locking base 62 for the bottom of the limit hammer 65, and a reset spring mounting part 624 is provided at the top of the self-locking base 62.

[0076] The hammer 65 is a hollow cylindrical structure with the same outer diameter and an inner diameter that gradually increases. In the middle is a hammer inner hole 651 for nesting the self-locking base 62. The inner diameter of the rear section of the hammer inner hole 651 is larger than the inner diameter of the front section of the hammer inner hole 651. The inner diameter of the front section of the hammer inner hole 651 is slightly larger than the outer diameter of the self-locking base 62, so that the hammer 65 can be nested on the self-locking base 62.

[0077] Please refer to Figure 4-6 , the release rod 61 is passed through the self-locking base 62 until the self-locking base 62 disc abuts against the base limit rib 611, at which time the ball limit rib 612 is almost at the same level as the first ball insertion hole 622 and the second ball insertion hole 623. The first ball 63 and the second ball 64 are placed into the first ball insertion hole 622 and the second ball insertion hole 623 respectively, at which time the balls are almost completely accommodated by the ball insertion holes, and the first ball 63 and the second ball 64 are 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 self-locking base 62 disc, and the starting point of the rear section of the hammer internal insertion hole 651 is lower than the first ball insertion hole 622 and the second ball insertion hole 623. At this time, the rear section of the hammer internal insertion hole 651 and the cylinder wall of the self-locking base 62 form an annular cavity 66, which can cause the first ball 63 and the second ball 64 to move in the annular cavity 66.

[0078] Please refer to Figure 7 The touch end seat 68 includes a release rod top insertion hole 681, a return spring seat 682 and a friction body seat 683. The touch end seat 68 is a hollow cylindrical structure, and the hollow part is the release rod top insertion hole 681. The rear end of the touch end seat 68 is provided with a raised friction body seat 683. One end of the return spring 67 is connected to the return spring mounting portion 624 of the self-locking base 62, and the other end is connected to the return spring seat 682 of the touch end seat 68. The return spring 67 is used to reset the pressed friction body 7 and the touch end seat 68. The release rod 61 passes through the return spring 67 and is fixedly engaged with the release rod top insertion hole 681. The friction body 7 is connected to the friction body seat 683 by threads. An internal thread cavity is provided inside the friction body 7, which can be threadedly connected to the friction body seat 683 provided with an external thread. The release rod top insertion hole 681 is provided with a snap mechanism, so that the release rod top 613 enters the release rod top insertion hole 681 and is fixed by the snap mechanism.

[0079] Please refer to Figure 8, 9 , the release rod 61 sequentially passes through the self-locking base 62, the reset spring 67 and is embedded in the trigger end seat 72. At this time, the friction body 7 and the self-locking trigger mechanism 6 can be matched and connected to the rod sleeve 4. The force applied to the friction body 7 is transmitted to the friction body seat 683, and the friction body seat 683 transmits the force to the release rod top insertion hole 681 that is against the reset spring 67. At this time, the reset spring 67 is deformed by the force and transmits the force to the self-locking base 62 that is against the other end. When the force disappears, the reset spring 67 recovers its deformation and restores the trigger end seat 68 and the friction body 7 to the position before the force was applied. The self-locking base 62 is displaced by force, and the first ball insertion hole 622, the second ball insertion hole 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 were originally almost accommodated by the first ball insertion hole 622, the second ball insertion hole 623 and the ball limiting rib 612, are squeezed and moved into the annular cavity 66, and the release rod 61 is displaced accordingly to touch the switch inside the rod sleeve 4, so that the extended pen core is retracted. Thus, the effect of pressing the friction body 7 to retract the pen core is achieved.

[0080] Please refer to Figure 10-16 The inverted self-locking pen in this embodiment has three refills containing a reversible thermochromic water-based ink composition, and three pressing bodies 2 are provided to allow the three refills to be extended separately. The inverted self-locking pen in this embodiment includes a writing unlocking state and an inverted self-locking state. The pen is in an unlocking state when placed vertically. Pressing the friction body 7 allows the release rod 61 to move and touch the switch inside the rod sleeve 4, so that the extended refill can be retracted with one click. When the pen is placed inverted, it is in a self-locking state. The friction body 7 is subjected to a force that prevents the release rod 61 from moving, so that the inverted friction body 7 can be used to erase the writing.

[0081] Specifically, the specific change process of the writing tool in the unlocked state is that the force applied to the friction body 7 is transmitted to the friction body seat 683, and the friction body seat 683 transmits the force to the release rod top socket 681 that is against the reset spring 67, and the release rod 61 that is engaged with the release rod top socket 681 is displaced downward by the force, and at the same time, the reset spring 67 is deformed from the elongated state to the compressed state by the force and transmits the force to the self-locking base 62 that is against the other end. When the force disappears, the reset spring 67 recovers the deformation and restores the touch end seat 68 and the friction body 7 to the position before the force is applied. The self-locking base 62 is subjected to a downward force, and the self-locking base 62 disc cannot continue to displace due to the obstruction of q611. At this time, the self-locking base 62 disc obtains an upward interaction force. After receiving the pressing force, the release rod 61 continues to move downward, so that the first ball insertion hole 622, the second ball insertion hole 623 and the ball limiting rib 612 change from the same horizontal plane to different horizontal planes. The first ball 63 and the second ball 64, which were originally almost accommodated by the first ball insertion hole 622, the second ball insertion hole 623 and the ball limiting rib 612, are squeezed and moved into the annular cavity 66 by the downward moving release rod 61. The first ball 63 and the second ball 64 are in the second position, and the release rod 61 is displaced accordingly to touch the switch inside the rod sleeve 4 to retract the extended pen core, thereby achieving the effect of retracting the pen core by pressing the friction body 7 with one click.

[0082] Specifically, the specific change process of the pen in the inverted self-locking state is that in the inverted initial state, the first ball socket 622, the second ball socket 623 and the ball limit rib 612 are in different horizontal planes, and the first ball 63 and the second ball 64 are squeezed in the first ball socket 622, the second ball socket 623 and the annular cavity 66. When the friction body 7 contacts the paper surface to erase the handwriting, it is subjected to the reverse force of the contact surface, and the reset spring 67 is forced from the compressed state to the extended state, pushing the self-locking base 62 to move upward. At this time, the first ball 63 and the second ball 64 gradually leave the annular cavity 66 until the first ball socket 622, the second ball socket 623 and the ball limit rib 612 are changed from different horizontal planes to the same horizontal plane, and the first ball 63 and the second ball 64 are accommodated in the first ball socket 622 again. 22. At the junction of the second ball insertion hole 623 and the ball limiting rib 612, the hammer 65 in the inverted state is affected by gravity and abuts against the touch end seat 72, that is, the inner wall of the hammer 65, the first ball insertion hole 622, the second ball insertion hole 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 the third position, thereby limiting the friction body 7 from continuing to move upward, and achieving the effect of locking the inverted friction body 7 without displacement.

[0083] The reversible thermochromic water-based ink composition used in the pen core of this embodiment includes a reversible thermochromic microcapsule pigment, and the reversible thermochromic water-based ink composition also includes water, a water-soluble organic solvent, a comb-type polymer dispersant having an antelope group on the side chain, an organic nitrogen-sulfur compound, and a water-soluble resin. The reversible thermochromic microcapsule pigment contains a reversible thermochromic composition formed by (A) an electron-donating color-developing organic compound, (B) an electron-accepting compound, and (C) a reaction medium that determines the occurrence temperature of the color development reaction of the aforementioned (A) and (B).

[0084] Specifically, a microcapsule pigment suspension containing a reversible thermochromic composition with color memory is obtained, wherein the reversible thermochromic composition includes 3.0 parts of 1,3-dimethyl-6-diaminofluoran as component (A), 3.0 parts of 4,4'-(2-ethylhexane-1,1-diyl)biphenol as component (B), 5.0 parts of 2,2-bis(4'-hydroxyphenyl)-hexafluoropropane, and 50.0 parts of 4-benzyloxyphenylethyl decanoate as component (C).

[0085] Furthermore, the microcapsule pigment suspension of the reversible thermochromic composition was centrifuged to separate the reversible thermochromic microcapsule pigment, which had an average particle size of 1.1 um, a complete fading temperature of 60°C, a complete coloring temperature of -30°C, and changed color from orange to colorless through temperature changes.

[0086] Furthermore, 25.0 parts of a reversible thermochromic microcapsule pigment that was pre-cooled to below -30°C for color development, 0.5 parts of a comb-type polymer dispersant (manufactured by Lubrizol Japan Ltd., trade name Solsperse 43000), 1.0 parts of an organic nitrogen-sulfur compound (manufactured by Hokko Chemical Industry Co., Ltd., trade name: Hokuside R-150, a mixture of 2-methyl-4-isothiazoline-3-one and 5-chloro-2-methyl-4-isothiazoline-3-one), 0.5 parts of polyvinyl alcohol, 35.0 parts of glycerol, 0.02 parts of a defoaming agent (silicone-based), and 37.98 parts of water were mixed to obtain a thermochromic aqueous ink composition.

[0087] Furthermore, the pH of the thermochromic aqueous ink composition is 7.00, and the surface tension is 39.8 mN / m.

[0088] When the friction body 7 is brought into contact with handwriting written with a thermochromic aqueous ink composition, the reversible thermochromic microcapsule pigment is in close contact with the written surface on the long diameter side (maximum outer diameter side), densely oriented and adhered, and the handwriting shows a high concentration of color development. With respect to the external force when the handwriting is rubbed by the friction body 7 such as an eraser, the microcapsule pigment is delicately elastically deformed into a shape that alleviates the external force, thereby suppressing the destruction of the wall membrane of the microcapsule, and can effectively show the handwriting without damaging the thermochromic function.

[0089] The friction body 7 can be selected to be elastic, can be suitable friction when rubbing, thereby produce the elastomer of friction heat, plastic foam, also can be plastic molding, stone, timber, metal, cloth. In addition, can also use eraser to rub handwriting.The friction body 7 selected for use in the present embodiment is an elastomer.

[0090] The elastic body of the friction body 7 can be silicone resin or SEBS resin (styrene-ethylene-butadiene-styrene segment copolymer). In this embodiment, SEBS resin is selected.

[0091] It should be noted that if Figure 1 As shown, the inverted self-locking pen provided in the present application can be a multi-core pen. In this embodiment, three pen cores are provided, and each pen core is connected to a corresponding pressing body 2. By pressing the pressing body 2, the corresponding pen core is in a core-out state.

[0092] In addition, the inverted self-locking pen can also be a single-core pen, that is, the pen is only provided with a single core, and those skilled in the art can make corresponding settings for the replaceable core pen 1 according to the specific application scenario.

[0093] It can be understood that other internal structures of the multi-core pen and the single-core pen (such as the arrangement and matching of the self-locking trigger mechanism 6, the friction body 7 and other related components) are well known to those skilled in the art and will not be described in detail here.

[0094] In the specification of this patent, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and components of this patent, but these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the drawings. Since the embodiments disclosed in this patent can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0095] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this patent will not further describe various possible combinations.

[0096] In addition, the various implementation methods of this patent can be combined arbitrarily, as long as they do not violate the concept of this patent, they should also be regarded as the contents disclosed by this patent.

Claims

1. An inverted self-locking pen, characterized in that: include: Pen refills; case; Self-locking trigger mechanism; When the pen is in a normal writing state, the self-locking trigger mechanism is in an unlocked state, and pressing the self-locking trigger mechanism can cause the pen core to extend or retract from the front end of the housing; When the writing tool is inverted, the self-locking trigger mechanism is in a locked state, and pressing the self-locking trigger mechanism cannot be pressed and the pen core cannot be extended or retracted from the front end of the shell.

2. The inverted self-locking writing tool according to claim 1, characterized in that: The pen core contains a reversible thermochromic water-based ink composition; The reversible thermochromic aqueous ink composition includes a reversible thermochromic microcapsule pigment.

3. The inverted self-locking writing tool according to claim 1, characterized in that: The writing tool further comprises a friction body, and the friction body is arranged at the rear end of the self-locking trigger mechanism.

4. The inverted self-locking writing tool according to claim 3, characterized in that: The friction body is made of an elastic and soft material, and the elastic and soft material includes one of rubber, rubber, elastomer, plastic foam, foam polyurethane and silica gel.

5. The inverted self-locking writing tool according to claim 1, characterized in that: The pen is a single-core pen, and the self-locking trigger mechanism can switch the pen core between extending and retracting from the front end of the housing; or The writing tool is a multi-core writing tool, and the writing tool comprises a pressing body connected to the pen core, the pressing body can make the pen core extend from the front end of the shell, and the self-locking trigger mechanism can make the pen core retract from the front end of the shell.

6. The inverted self-locking writing tool according to claim 5, characterized in that: The writing tool is the multi-core writing tool, the self-locking trigger mechanism comprises a release rod, a self-locking base, a ball and a hammer, the release rod is provided with a base limiting rib, a ball limiting rib and a release rod top, the self-locking base comprises a release rod through hole, a first ball insertion hole, a second ball insertion hole, and a reset spring mounting portion; The number of the balls is 1, 2, 3, 4, 5 or 6.

7. The inverted self-locking writing tool according to claim 6, characterized in that: The hammer has a hammer inner insertion hole, and the hammer inner insertion hole is embedded in the self-locking base to form an annular cavity.

8. The inverted self-locking writing tool according to claim 7, characterized in that: The self-locking trigger mechanism also includes a return spring and a trigger end seat.

9. The inverted self-locking writing tool according to claim 8, characterized in that: The trigger end seat comprises a release rod top insertion hole, a return spring seat and a friction body seat.

10. The inverted self-locking writing tool according to claim 8, characterized in that: In the unlocked state, the release rod can be forced to move downward in the axial direction, and the release rod squeezes the ball to move toward the annular cavity; In the locked state, the hammer is pressed against the actuating end seat by gravity, and the ball is fixed by the hammer, the release rod and the self-locking base.

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