Delayed-reset grip pen

Abstract

A delayed-reset grip pen, comprising an inner rod, an outer rod, a writing tool body and a displacement reset member. The inner rod and the outer rod are telescopically engaged and can move relative to / away from each other; the inner rod is provided with a limiting anti-disengagement boss and a mating end and the outer rod is provided with a matching end, or the outer rod is provided with a limiting anti-disengagement boss and a mating end and the inner rod is provided with a matching end; as the inner rod and the outer rod move telescopically relative to each other, when the matching end moves to the mating end, the pen extends a refill and maintains a refill extended state by means of a writing grip force; when the writing grip force is released, the matching end slowly disengages from a first position and automatically resets to the limiting anti-disengagement boss by means of the displacement reset member to retract the refill; and the matching end and / or the outer rod and / or the inner rod have a deformation capability, and the duration of slow disengagement is controlled by the degree of deformation. According to the delayed-reset grip pen, the use and operation of an existing pen are simplified, and after completion of use or accidental dropping, the pen will automatically retract the refill within a certain period of time to protect the refill, requiring no other operations.

Description

A delayed reset grip pen Technical Field

[0001] The present invention relates to a pen, in particular to a delayed-reset grip pen. Background Art

[0002] Looking at the historical development of pens, from primitive pens to feather pens, the development of pens has gone through many stages. Each stage has brought unique characteristics and advantages to the development of pens. Nowadays, the requirements for pens are no longer satisfied with just being able to write, but have higher requirements for user experience, efficiency, and environmental protection.

[0003] How to achieve more complex functions through simpler thinking and creativity, so that people can operate more editably and comfortably, provide more valuable and competitive products, change people's lives through design, reduce production costs, reduce the difficulty of assembly, and improve the richness of operation and rich functions, is the direction we strive to pursue. For example, a fully automatic safety pencil (CN201220004102.7) disclosed in the Chinese invention patent document, the invention uses a grip button to assist in controlling the lead ejection. When writing, the lead ejection is automatically performed when the hand grips the grip button. When not in use, the pen cap and the lead automatically retract into the pen cap when the hand leaves the button. However, since the invention only controls the lead ejection and retraction through the grip button, in actual use, when the pen grip posture needs to be adjusted, releasing the grip button will cause the lead to retract quickly. Subsequently, the grip button needs to be pressed again to continue writing, which reduces the actual use experience. Ordinary press pens cannot retract the lead automatically. After use, it is easy to forget to retract the lead, or if it is accidentally dropped, it is easy to cause the lead to touch the ground and be damaged, making writing difficult. Therefore, we need a grip pen that is comfortable to hold and has a certain timeliness in the retraction process. Summary of the Invention

[0004] The purpose of the present invention is to simplify the use of existing pens and protect the pen core from falling. It provides a delayed resetting grip pen. After use or if accidentally dropped, the pen will automatically retract the core within a certain period of time to protect the pen core without any other operation. To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A first technical solution is provided: a delayed-reset grip pen, comprising a retractable writing sleeve rod and a writing tool body, the writing sleeve rod comprising an inner rod and an outer rod, the writing tool body being installed in the writing sleeve rod, and the writing tool body having two position states, namely, a core-receiving second position B and a core-extruding first position A, according to the retractable state of the writing sleeve rod; when either the inner rod or the outer rod is provided with a mating end alone, the other is provided with a mating end, the mating end and the mating end do not mat with each other when the core is retracted, and a temporary mating state is reached when the core is extruded; when the inner rod and the outer rod are relatively retracted to allow the writing tool body to extrude the core, a continuous core-extruding mating state is formed through the temporary mating state between the mating end and the mating end combined with the gripping force of the user during use; when the gripping force of the user disappears, the mating end and the mating end will move away from each other for a certain distance immediately or after a delay of N seconds, and at this time the writing tool body can retract the writing sleeve rod to achieve core retraction.

[0006] A second technical solution is provided: a delayed reset grip pen, comprising an inner rod, an outer rod, a writing tool body, and a displacement reset member. The inner rod and the outer rod fit together to enable relative / reverse movement, the writing tool body is located between the inner rod and the outer rod, and the writing tool body is reset by the displacement reset member to perform relative / reverse movement between the inner rod and the outer rod. The inner rod is provided with a mating end, and the outer rod is provided with a matching end. As the inner rod and the outer rod fit together, the matching end moves to a first position at the mating end to form a temporary mating state, wherein the pen core is ejected and maintained in the ejected state by the writing grip force. When the writing grip force is lost, the matching end slowly moves away from the first position and automatically resets to a second position via the displacement reset member to retract the core.

[0007] A third technical solution is provided: a delayed reset grip pen, comprising an inner rod, an outer rod, a writing tool body and a displacement reset part, wherein the inner rod and the outer rod fit together and can move relative / backward, the writing tool body is located between the inner rod and the outer rod, and the writing tool body is reset by the displacement reset part so as to move relative / backward between the inner rod and the outer rod; a mating end is provided on the outer rod, and a matching end is provided on the inner rod; as the inner rod and the outer rod fit together and move, a temporary mating state is formed when the matching end moves to the first position of the mating end, and the pen core is ejected and maintained in the core-out state by the writing grip force; when the writing grip force is lost, the matching end slowly separates from the first position and automatically resets to the second position through the displacement reset part to retract the core.

[0008] As a preferred embodiment of the present invention, when the telescopic state of the writing sleeve rod is the automatic reset telescopic state, a reset structure for automatically reset after the gripping force disappears is provided between the inner rod and the outer rod.

[0009] As a preferred embodiment of the present invention: the reset structure is a displacement reset member; the displacement reset member is sleeved on the outside of the writing tool body and is located between the inner end of the outer rod and the inner rod, and the writing tool body is clamped at the tail end of the writing sleeve rod. At this time, the head of the inner rod is removable for easy core replacement; or the displacement reset member is sleeved on the outside of the writing tool body and is located between the core outlet of the inner rod and the writing end of the writing tool body. At this time, the tail of the outer rod is removable for easy core replacement.

[0010] As a preferred embodiment of the present invention: the matching end and / or the outer rod and / or the inner rod have the ability to deform, and the specific disengagement time is controlled by the degree of deformation of the matching end and / or the outer rod and / or the inner rod. As a preferred embodiment of the present invention: the temporary mating state means that when there is no external force interfering with the inner rod and the outer rod, the matching end and the mating end will immediately disengage from each other or will be disengaged from each other's original temporary mating state after a delay of N seconds. As a preferred embodiment of the present invention: the matching end and the matching end achieve a temporary mating state through a snap-fit ​​structure or a delayed mating structure or a combination of the two, forming a friction force or a damping force.

[0011] As a preferred embodiment of the present invention, the delayed matching structure can be achieved by the following method:

[0012] 1. Both the mating end and the matching end are provided with protrusions, thereby forming a mating friction force between the mating end and the matching end;

[0013] 2. A sticky substance is provided on either the mating end and / or the matching end; a mating damping force is formed between the mating end and the matching end;

[0014] 3. A use groove is provided on the mating end, a mating boss is provided on the matching end, and a relief slope is provided on the use groove and / or the mating boss;

[0015] 4. A use groove is provided on the matching end, a matching boss is provided on the mating end, and a relief slope is provided on the use groove and / or the matching boss;

[0016] 5. Anti-slip grooves are provided on both the mating end and the matching end, thereby forming a mating friction force between the mating end and the matching end;

[0017] 6. The matching end is provided with an inner slope, and the mating end is provided with an outer slope that matches the inner slope. The matching end and / or the mating end have a deformation force. Under the writing grip, the inner slope and the outer slope maintain a large-area contact to generate friction. With a certain additional grip, the writing instrument body remains in a state of exposing the lead. When there is no writing grip, as the contact between the inner slope and the outer slope gradually decreases, the writing instrument body gradually returns to a state of retracting the lead.

[0018] 7. Either the matching end or the engaging end is provided with a working groove, and the other is provided with a engaging boss, and the engaging boss is provided with a slow-release slope, and the delayed return member is sleeved on the outside of the outer rod and the inner rod; under the writing grip force, the engaging boss remains in the working groove, and when there is no writing grip force, the delayed return member slowly prevents the engaging boss from leaving the working groove.

[0019] As a preferred embodiment of the present invention: it also includes a delayed return member, the mating end and the matching end are snap-fit ​​structures, either of the mating end and the matching end is independently provided with a use groove, and the other is provided with a matching boss, and the delayed return member is placed in the use groove; under the writing grip force, the delayed return member deforms to keep the matching boss in the use groove, and when there is no writing grip force, the delayed return member slowly rebounds to slowly separate the matching boss from the use groove. As a preferred embodiment of the present invention: the temporary mating state formed between the matching end and the matching end has an external inhibition zone, and when the external inhibition zone is subjected to additional force by an external force, the temporary mating state formed between the matching end and the matching end will be continuously suppressed, thereby ensuring that the user can maintain the continuous and stable core discharge without too much additional force when holding the pen normally.

[0020] As a preferred embodiment of the present invention, the inner rod and / or outer rod are provided with a position-limiting anti-detachment boss. As a preferred embodiment of the present invention, the present invention further comprises a delayed return member; the delayed return member is placed inside the mating end; under a writing gripping force, the delayed return member deforms to keep the mating end inside the mating end; when there is no writing gripping force, the delayed return member slowly rebounds to slowly separate the mating end from the mating end; or, the delayed return member is sleeved on the outside of the outer rod and the inner rod; under a writing gripping force, the mating end remains inside the mating end; when there is no writing gripping force, the delayed return member slowly prevents the mating end from separating from the mating end.

[0021] As a preferred embodiment of the present invention: in order to achieve better core extraction, the following three methods can be used:

[0022] 1. Gripping and core-out: The inner rod is provided with a core-out gripping slope with a guiding function, and the outer rod is provided with a gripping portion, and the gripping portion is also provided with a core-out gripping boss;

[0023] 2. Gripping and core-out: The inner rod is provided with a gripping portion, the gripping portion is also provided with a gripping and core-out boss, and the outer rod is provided with a gripping and core-out slope with a guiding function;

[0024] 3. Pulling out the core: the inner rod is provided with a pulling portion;

[0025] When the core is being pulled out, the gripping portion is squeezed and deformed by an external force, which can cause the gripping core-pulling boss to press the gripping core-pulling slope to achieve core pulling;

[0026] When pulling out the core, the lifting part is directly moved up manually to realize the core removal.

[0027] As a preferred embodiment of the present invention: the delayed reset member is composed of an elastic material, memory metal, memory alloy or elastic structure, and the displacement reset member is composed of an elastic material, memory metal, memory alloy or elastic structure.

[0028] As a preferred embodiment of the present invention: the matching range of the matching end and the mating end is the normal pen-holding range of the user during normal writing, specifically within 2-90 mm from the writing end of the writing tool body. As a preferred embodiment of the present invention: the head of the inner rod and / or the tail of the outer rod are configured as detachable parts to facilitate core replacement. As a preferred embodiment of the present invention: the inner rod and / or the outer rod are provided with an auxiliary slope for use. As a preferred embodiment of the present invention: the outer rod is provided with an extended gripping rod, and the matching end is provided on the extended gripping rod. As a preferred embodiment of the present invention: the inner rod is also provided with a gripping support boss for accommodating the extended gripping rod. As a preferred embodiment of the present invention: a ball is further provided between the gripping core-out boss and the gripping core-out slope to reduce friction and improve the comfort of the user gripping the core. As a preferred embodiment of the present invention: a deformation opening is provided on the inner rod; the upper side of the mating end on the inner rod is configured as a force-bearing protrusion.

[0029] Compared with the prior art, the present invention has the following beneficial effects:

[0030] 1. On the basis of increasing writing comfort and improving user experience, it can simplify operation, automatically retract the core within a certain period of time to avoid forgetting to retract the core, and at the same time has an anti-fall effect, protecting the product when it falls, and making it more durable with a long service life.

[0031] Second, by adding a delayed reset component, the delay time of the automatic core retraction can be better controlled, and the service life of the delay function of the automatic core retraction can be further increased.

[0032] 3. It has a delay function for automatic retraction of the core, so that the user can ensure normal use when changing the grip position, etc., instead of causing the core to retract due to misoperation. In order to also have the anti-fall function, it is best to control the delay time "N" to the range of 0.2-5 seconds.

[0033] 4. The delayed return part is sleeved outside the outer rod and the inner rod, which can provide better contraction force for the extended grip rod and the matching end. The additional contraction force can not only ensure the timeliness of the delayed automatic core retraction, but also greatly save the internal space of the inner rod, and is better installed and implemented. At the same time, the requirements for structural materials will be reduced accordingly. In addition, it can also be used directly as a pen grip, which improves writing comfort, reduces accessories, and improves overall durability.

[0034] 5. Simple structure, easy to produce, popularizable, and low cost.

[0035] 6. Humanized operation, ingenious design, small structure, big function, and more scientific.

[0036] 7. Easy to assemble and mass produce, can be assembled on an automated process line. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] FIG1 is an exploded view of embodiment 1 of the present invention.

[0038] 2 are, from left to right, a front view and a left sectional view of a core-out state, and a front view and a left sectional view of a core-in state of embodiment 1 of the present invention.

[0039] FIG3 is an exploded view of embodiment 2 of the present invention.

[0040] 4 are, from left to right, a front view and a left sectional view of a core-out state, and a front view and a left sectional view of a core-in state of embodiment 2 of the present invention.

[0041] FIG5 is an exploded view of embodiment 3 of the present invention.

[0042] 6 are, from left to right, a front view and a left sectional view of a core-out state, and a front view and a left sectional view of a core-in state of embodiment 3 of the present invention.

[0043] FIG7 is an exploded view of embodiment 4 of the present invention.

[0044] 8 are, from left to right, a front view and a left sectional view of a core-out state, and a front view and a left sectional view of a core-in state of embodiment 4 of the present invention.

[0045] FIG9 is an exploded view of embodiment 5 of the present invention.

[0046] 10 shows, from left to right, a front view and a left sectional view of a core-out state, and a front view and a left sectional view of a core-in state of embodiment 5 of the present invention.

[0047] FIG11 is an exploded view of embodiment 6 of the present invention.

[0048] 12 shows, from left to right, a front view and a left sectional view of a core-out state, and a front view and a left sectional view of a core-in state of embodiment 6 of the present invention.

[0049] FIG13 is an exploded view of embodiment 7 of the present invention.

[0050] 14 shows, from left to right, a front view and a left sectional view of a core-out state, and a front view and a left sectional view of a core-in state of embodiment 7 of the present invention.

[0051] FIG15 is an exploded view of Example 8 of the present invention.

[0052] 16 are, from left to right, a front view and a left sectional view of the core-out state, and a front view and a left sectional view of the core-in state of embodiment 8 of the present invention.

[0053] FIG17 is an exploded view of Example 9 of the present invention.

[0054] 18 shows, from left to right, a front view and a left sectional view of a core-out state, and a front view and a left sectional view of a core-in state of embodiment 9 of the present invention.

[0055] FIG19 is an exploded view of embodiment 10 of the present invention.

[0056] 20 are, from left to right, a front view and a left sectional view of the core-out state, and a front view and a left sectional view of the core-in state of embodiment 10 of the present invention.

[0057] Reference numerals: 1. Outer rod; 11. Mating end; 12. Extended grip rod. 2. Inner rod; 21. Position-limiting anti-drop boss; 22. Mating end; 23. Gripping support boss; 24. Deformable opening; 25. Force-bearing projection. 3. Delayed return member. 4. Displacement return member. 5. Writing instrument body. 6. Eased release ramp. 7. Removable component. 8. Auxiliary ramp; 81. Gripping core extraction ramp; 82. Gripping portion; 821. Gripping core extraction boss; 83. Lifting portion; 84. Ball bearing. DETAILED DESCRIPTION

[0058] Embodiment 1: A pen as shown in Figures 1 to 2 includes an inner rod 2, an outer rod 1, a writing tool body 5 and a displacement reset member 4. The inner rod 2 is provided with a limit anti-slip boss 21 and a mating end 22, and the outer rod 1 is provided with a matching end 11; the matching end 11 has deformation capability; the delayed reset member 3 is placed in the mating end 22, and the delayed reset member 3 has elastic force; the inner rod 2 and the outer rod 1 are fitted with each other; the writing tool body 5 is located between the inner rod 2 and the outer rod 1. In this embodiment, the writing tool body 5 can be a gel pen.

[0059] In order to better prevent the inner rod 2 and the outer rod 1 from being easily separated after being installed, the above-mentioned matching end 11 is not easy to separate from the limiting anti-separation boss 21, but when replacing the refill, the inner rod 2 and the outer rod 1 can also be separated by pulling them apart with force.

[0060] The mating end 11 slides between the mating end 22 and the position-limiting anti-dropout protrusion 21. When the core is ejected, the mating end 11 is located inside the mating end 22 to form a temporary mating relationship. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed. The user holds the outer rod 1 to write normally, and the grip force of writing can prevent the mating end 11 from being separated from the mating end 22, thereby maintaining the core ejection state.

[0061] If the user does not apply force to the pen holding area of ​​the outer rod 1 and loses the writing grip, then in the absence of external force, after N seconds, the delayed reset component 3 will restore the memory state, and then through the influence of the displacement reset component 4, the matching end 11 will be pushed out by the delayed reset component 3 and then under the reset force of the displacement reset component 4, the temporary matching relationship will be released after the separation of the matching end 22 and the limiting anti-separation boss 21 will be contacted. The further displacement of the matching end 11 is limited by the limiting anti-separation boss 21 to prevent the inner rod 2 and the outer rod 1 from separating. At this time, the writing tool body 5 is retracted into the inner rod 2 and finally maintains the core-retracted state.

[0062] The elastic force of the delayed reset member 3 is greater than the deformation force of the above-mentioned matching end 11 or outer rod 1 or inner rod 2; however, the elastic force of the delayed reset member 3 here is a slow rebound, which requires a certain deformation recovery time. By controlling the slow rebound force of the delayed reset member 3 and the deformation force of the matching end 11 or outer rod 1 or inner rod 2, the specific time "N" of delaying the automatic core retraction can be controlled.

[0063] Furthermore, the head of the inner rod 2 is provided with a detachable part 7, which is connected in a detachable manner such as a threaded connection. The refill is replaced by disassembling and assembling the detachable part 7, rather than by pulling it apart by force as described above, providing another way of replacing the refill. The restraining force of the anti-detachment boss 21 on the matching end 11 can be designed to be strengthened, so that the matching end 11 is extremely difficult to detach from the limiting anti-detachment boss 21 after entering the limiting anti-detachment boss 21, thereby preventing the inner rod 2 and the outer rod 1 from accidentally detaching.

[0064] For ease of installation, the displacement reset member 4 is located between the writing tool body 5 and the inner rod 2. For ease of production, the delayed reset member 3 is composed of an elastic material, and the displacement reset member 4 is composed of a spring. In order to improve the writing experience, the matching range of the matching end 11 and the matching end 22 is the normal pen-holding range of the user during normal writing, specifically within 2-90 mm from the writing end of the writing tool body 5. In order to make the core ejection smoother, the inner rod 2 is provided with an auxiliary slope 8, which is located at the transition point where the matching end 11 moves from the second position to the first position, so that the matching end 11 can move smoothly.

[0065] In this embodiment, the outer rod 1 is made of a hard material and the matching end 11 is made of an elastic material, so that the matching end 11 has a deformation force, and a delayed reset member 3 is also provided in the matching end 22. The elastic force requirement for the displacement reset member 4 can be much smaller, because the delayed reset member 3 will provide an elastic force to release the temporary matching state between the matching end 11 and the matching end 22, which will further accelerate the release of the temporary matching state between the matching end 11 and the matching end 22. Under this embodiment, the elastic force requirement for the displacement reset member 4 is lower, and the force required for the overall core-out operation will also be appropriately reduced.

[0066] Embodiment 2: A pen as shown in Figures 3 to 4 includes an inner rod 2, an outer rod 1, a writing tool body 5 and a displacement reset member 4. The inner rod 2 is provided with a limit anti-detachment boss 21 and a mating end 22, and the outer rod 1 is provided with a matching end 11; the outer rod 1 and the inner rod 2 are also sleeved with a delayed reset member 3, the delayed reset member 3 has a shrinkage elastic force and either end is clamped and fixed to the outer rod 1 / inner rod 2; the matching end 11 and / or the matching end 22 are also provided with a slow-release slope 6; the outer rod 1 has deformation ability; the inner rod 2 and the outer rod 1 are fitted together; the writing tool body 5 is located between the inner rod 2 and the outer rod 1; in this embodiment, the writing tool body 5 is a fluorescent pen.

[0067] The mating end 11 slides between the mating end 22 and the position-limiting anti-dropout protrusion 21. When the core is ejected, the mating end 11 is located inside the mating end 22 to form a temporary mating relationship. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed. The user holds the outer rod 1 to write normally, and the grip force of writing can prevent the mating end 11 from being separated from the mating end 22, thereby maintaining the core ejection state.

[0068] If the user does not apply force to the pen holding area of ​​the outer rod 1 and loses the writing grip, then in the absence of external force, through the influence of the displacement reset member 4 and the slow release slope 6, the matching end 11 will slowly disengage from the engagement state with the matching end 22, and the delayed reset member 3 will slowly prevent the matching end 11 from disengaging from the engagement state with the matching end 22. After N seconds, the matching end 11 is completely disengaged from the matching end 22 to release the temporary engagement relationship, and the writing tool body 5 is retracted into the inner rod 2. At this time, it is in the core-retracted state, and when the matching end 11 disengages from the matching end 22 and contacts the limit anti-disengagement boss 21, the limit anti-disengagement boss 21 can limit the further displacement of the matching end 11 to prevent the inner rod 2 and the outer rod 1 from separating, thereby maintaining the core-retracted state.

[0069] The elastic force of the delayed reset member 3 is smaller than the elastic force of the displacement reset member 4, but is affected by the slow-release slope 6, so it can achieve the actual effect of slow release.

[0070] The setting of the above-mentioned release slope 6 can increase the friction between the inner rod 2 and the outer rod 1. The friction between the release slope 6 and the inner rod 2 or the outer rod 1 can offset a certain elastic force of the displacement reset member 4. Moreover, as the contact area between the release slope 6 and the inner rod 2 or the outer rod 1 decreases, the friction between the release slope 6 and the inner rod 2 or the outer rod 1 will also decrease, thereby achieving a damping-like effect. By controlling the friction, the delayed reset member 3 and the elastic force of the displacement reset member 4, the specific time "N" of delaying the automatic core retraction can be controlled.

[0071] The displacement restoring member 4 is located between the outer rod 1 and the inner rod 2 ; the tail of the writing tool body 5 is to be clamped on the tail of the outer rod 1 .

[0072] The delayed reset member 3 is made of elastic material or elastic structure, which can better control the delay time of automatic core retraction and increase the service life of the automatic core retraction delay function. The displacement reset member 4 is made of elastic material or elastic structure.

[0073] The mating end 11 and the engaging end 22 cooperate within the normal writing range of a user's pen grip, specifically within 2-90 mm from the writing end of the writing instrument body 5. Furthermore, the rear end of the outer rod 1 is provided with a detachable member 7, which is connected by a threaded connection or other detachable method. The pen refill can be replaced by disassembling and assembling the detachable member 7. Therefore, once the mating end 11 enters the position-limiting anti-detachment boss 21, it is extremely difficult for the mating end 11 to disengage from the position-limiting anti-detachment boss 21, thereby preventing accidental detachment between the inner rod 2 and the outer rod 1. In order to make the core ejection smoother, the inner rod 2 and the outer rod 1 are provided with an auxiliary slope 8, which is located at the transition point where the matching end 11 moves from the second position to the first position, so that the matching end 11 can move smoothly; when the outer rod 1 is made of a hard material, the outer rod 1 still has the ability to deform, and the front end of the outer rod 1 is provided with a plurality of extended gripping rods 12, and the matching end 11 is provided on the inner end of the extended gripping rod 12; the inner rod 2 is also provided with a gripping support boss 23 for accommodating the extended gripping rod 12, which can ensure that the pen holding area still has better support, and can ensure that the delayed reset member 3 can be more space-savingly sleeved on the outside of the outer rod 1 and the inner rod 2. In this embodiment, the outer rod 1 is made of a hard material, and the gripping rod 12 is extended by an elastic structure, so that both the matching end 11 and the outer rod 1 have deformation force;

[0074] The delayed return member 3 is sleeved outside the outer rod 1 and the inner rod 2, which can provide better contraction force to the extended gripping rod 12 and the matching end 11. Through the additional contraction force, the delayed return member 3 will provide a contraction force to prevent the temporary mating state between the matching end 11 and the mating end 22 from being released, which will further delay the release of the temporary mating state between the matching end 11 and the mating end 22. In this embodiment, the elastic force requirement of the displacement return member 4 is higher, and the force required for the overall core removal operation will also increase appropriately. For better fit, it is best that the matching end 11 is made of a hard material, so that the sliding effect between it and the inner rod 2 will be better.

[0075] By placing the delayed reset part 3 outside the outer rod 1 and the inner rod 2, the timeliness of the delayed automatic core retraction can be guaranteed, the internal space of the inner rod 2 can be greatly saved, and the installation and implementation can be better achieved. At the same time, the requirements for structural materials will be reduced accordingly.

[0076] In particular, the coordination requirements for the gradual departure from the slope 6 have been improved, and the durability of the overall automatic core retraction has been improved, which can achieve a longer delayed automatic core retraction time, which can be extended to 0.5 to 60 seconds, depending on the specific actual parameters; however, too long a delay time will result in the loss of the anti-fall effect.

[0077] Furthermore, the delayed reset member 3 can also be used as a soft rubber cover of the pen, thereby saving a component and improving greater comfort.

[0078] Embodiment 3: As shown in Figures 5 and 6, a pen comprises an inner rod 2, an outer rod 1, a writing instrument body 5, and a displacement reset member 4. The inner rod 2 is provided with a position-limiting anti-slip boss 21 and a mating end 22, and the outer rod 1 is provided with a mating end 11; the mating end 11 and / or the mating end 22 are further provided with a slow-release slope 6. The inner rod 2 is deformable, and the inner rod 2 and outer rod 1 fit together; the writing instrument body 5 is located between the inner rod 2 and outer rod 1. In this embodiment, the writing instrument body 5 is a ballpoint pen. To better prevent the inner rod 2 and outer rod 1 from easily separating after installation, the mating end 11 is not easily disengaged from the position-limiting anti-slip boss 21, but can be forcibly pulled apart when replacing the pen refill.

[0079] The mating end 11 slides between the mating end 22 and the position-limiting anti-dropout protrusion 21. When the core is ejected, the mating end 11 is located inside the mating end 22 to form a temporary engagement relationship. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed. The user holds the outer rod 1 to write normally, and the grip force of writing can prevent the mating end 11 from being separated from the mating end 22, thereby maintaining the core ejection state.

[0080] If the user does not apply force to the pen-holding area of ​​the outer rod 1 and loses the writing grip, then in the absence of external force, the matching end 11 will slowly disengage from the engagement state with the matching end 22 through the influence of the displacement reset member 4 and the slow-release slope 6. After N seconds, when the matching end 11 is completely disengaged from the matching end 22 to release the temporary engagement relationship, the writing tool body 5 will be retracted into the inner rod 2, and this is the core-retracted state; and according to the influence of the slope of the slow-release slope 6, the matching end 11 will be disengaged from the matching end 22 within a certain time limit, and finally contact the limit anti-detachment boss 21. The limit anti-detachment boss 21 limits further displacement of the matching end 11 to prevent the inner rod 2 and the outer rod 1 from separating, thereby maintaining the core-retracted state.

[0081] In order to make the core ejection smoother, the inner rod 2 and the matching end 11 are provided with an auxiliary slope 8. The auxiliary slope 8 is located at the transition point where the matching end 11 moves from the second position to the first position, so that the matching end 11 can move smoothly. For ease of installation, the displacement reset member 4 is located between the writing tool body 5 and the inner rod 2. For ease of production, the delayed reset member 3 is composed of an elastic material, and the displacement reset member 4 is composed of a spring. In order to improve the writing experience, the matching range of the matching end 11 and the matching end 22 is the normal pen holding range of the user during normal writing, specifically within 2-90 mm from the writing end of the writing tool body 5. In this embodiment, the outer rod 1 is made of an elastic material, so that both the matching end 11 and the outer rod 1 have deformation force. It is best that the matching end 11 is made of a hard material, so that the sliding effect between the inner rod 2 will be better. The inner rod 2 is provided with a deformation opening 24, so that when the inner rod 2 is made of a hard material, it also has deformation ability. The greater the slope of the above-mentioned slow-release slope 6, the longer the delay time will be. Conversely, the smaller the slope, the shorter the delay time will be. The specific time is also affected by the deformation force of the inner rod 2 and the elastic force of the displacement reset member 4.

[0082] Embodiment 4: As shown in Figures 7 and 8, a pen comprises an inner rod 2, an outer rod 1, a writing instrument body 5, and a displacement reset member 4. The inner rod 2 is provided with a position-limiting anti-slip boss 21 and a mating end 22, and the outer rod 1 is provided with a mating end 11. The outer rod 1 is deformable; the mating end 22 is embedded with a delayed reset member 3. The inner rod 2 and outer rod 1 are mutually nested; the writing instrument body 5 is located between the inner rod 2 and outer rod 1. In this embodiment, the writing instrument body 5 is a fountain pen. To better prevent the inner rod 2 and outer rod 1 from easily separating after installation, the mating end 11 is not easily separated from the position-limiting anti-slip boss 21, but can be forcibly pulled apart when replacing the pen refill.

[0083] The mating end 11 slides between the mating end 22 and the position-limiting anti-dropout protrusion 21. When the core is ejected, the mating end 11 is located inside the mating end 22 to form a temporary engagement relationship. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed. The user holds the outer rod 1 to write normally, and the grip force of writing can prevent the mating end 11 from being separated from the mating end 22, thereby maintaining the core ejection state.

[0084] If the user does not apply force to the pen holding area of ​​the outer rod 1 and loses the writing grip, then in the absence of external force, after N seconds, the delayed reset member 3 will restore the memory state, causing the matching end 11 to break away from the restriction of the matching end 22, and then through the influence of the displacement reset member 4, the writing tool body 5 will be retracted into the inner rod 2, which is now in the core-retracted state; and when the matching end 11 breaks away from the matching end 22 and contacts the limit anti-detachment boss 21, the limit anti-detachment boss 21 can limit the further displacement of the matching end 11 to prevent the inner rod 2 and the outer rod 1 from separating, thereby maintaining the core-retracted state.

[0085] The elastic force of the delayed return member 3 is greater than the deformation force of the above-mentioned matching end 11 or outer rod 1 or inner rod 2; however, the elastic force of the delayed return member 3 here is a slow rebound, which requires a certain deformation recovery time. Therefore, by controlling the slow rebound force of the delayed return member 3 and the deformation force of the matching end 11 or outer rod 1 or inner rod 2, the specific time "N" of delaying the automatic core retraction can be controlled.

[0086] Furthermore, the tail of the outer rod 1 is provided with a detachable part 7, which is connected in a detachable manner such as a threaded connection. The pen core is replaced by disassembling and assembling the detachable part 7. Therefore, when the matching end enters the limit anti-separation boss, the above-mentioned matching end 11 is extremely difficult to separate from the limit anti-separation boss 21, thereby preventing accidental separation between the inner rod 2 and the outer rod 1.

[0087] In order to facilitate installation, the displacement reset member 4 is located between the writing tool body 5 and the inner rod 2. In order to facilitate production, the delayed reset member 3 is composed of an elastic material, and the displacement reset member 4 is composed of a spring. In order to improve the writing experience, the matching range of the matching end 11 and the matching end 22 is the normal pen-holding range of the user during normal writing, specifically within 2-90 mm from the writing end of the writing tool body 5. In order to make the core ejection smoother, the inner rod 2 is provided with an auxiliary slope 8, and the auxiliary slope 8 is located at the transition point where the matching end 11 moves from the second position to the first position, so that the matching end 11 can move smoothly. In order for the outer rod 1 to still have the ability to deform when the outer rod 1 is made of hard material, an extension gripping rod 12 is provided on the outer rod 1, and the matching end 11 is provided on the extension gripping rod 12;

[0088] In this embodiment, the outer rod 1 and the matching end 11 are both made of hard materials, but by extending the holding rod 12, the matching end 11 has a deformation force, and a delayed reset member 3 is also provided in the matching end 22. The elastic force requirement for the displacement reset member 4 can be much smaller, because the delayed reset member 3 will provide an elastic force to release the temporary matching state between the matching end 11 and the matching end 22, which will further accelerate the release of the temporary matching state between the matching end 11 and the matching end 22. Under this embodiment, the elastic force requirement for the displacement reset member 4 is lower, and the force required for the overall core-out operation will also be appropriately reduced.

[0089] Example 5: A pen as shown in Figures 9 and 10 includes an inner rod 2, an outer rod 1, a writing tool body 5 and a displacement reset member 4. The inner rod 2 is provided with a limit anti-slip boss 21 and a mating end 22, and the outer rod 1 is provided with a matching end 11; the outer rod 1 and the inner rod 2 both have deformation capabilities, and the inner rod 2 and the outer rod 1 are fitted into each other; the writing tool body 5 is located between the inner rod 2 and the outer rod 1.

[0090] When the core is ejected, the mating end 11 is placed inside the mating end 22. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed. The user holds the outer rod 1 and writes normally. The grip force of writing can prevent the mating end 11 from separating from the mating end 22, thus maintaining the core ejection state.

[0091] If the user does not apply force to the pen holding area of ​​the outer rod 1 and loses the writing grip, then in the absence of external force, through the influence of the displacement reset member 4, after N seconds, the deformation force of the matching end 11 cannot offset the influence of the force brought by the displacement reset member 4, thereby causing the matching end 11 to break away from the restriction of the matching end 22, thereby causing the writing tool body 5 to be retracted into the inner rod 2, and then it is in the core-retracted state.

[0092] In order to better prevent the inner rod 2 and the outer rod 1 from separating when the core is retracted, the matching end 11 is not easy to separate from the limiting anti-separation boss 21. In order to ensure that the inner rod 2 and the outer rod 1 are always kept separated, a continuous force is required. The displacement reset member 4 is located between the writing tool body 5 and the inner rod 2, and is transmitted through the writing tool body 5 to achieve a continuous force to separate the outer rod 1 and the inner rod 2. The displacement reset member 4 is composed of a spring. The matching range of the matching end 11 and the matching end 22 is the normal pen holding range of the user during normal writing, specifically within 2-90 mm from the writing end of the writing tool body 5. In order to make the core ejection smoother, the inner rod 2 and / or the outer rod 1 are provided with an auxiliary slope 8. The auxiliary slope 8 is located at the transition point where the matching end 11 moves from the second position to the first position, so that the matching end 11 can move smoothly. The writing tool body 5 is a gel pen, a ballpoint pen, a fountain pen, a mechanical pencil, a highlighter, a marker, an eraser or other tools.

[0093] Furthermore, the head of the inner rod 2 is provided with a detachable part 7, which is connected in a detachable manner such as a threaded connection. The refill is replaced by disassembling and assembling the detachable part 7, rather than by pulling it apart by force as described above, providing another way of replacing the refill. The restraining force of the anti-detachment boss 21 on the matching end 11 can be designed to be strengthened, so that the matching end 11 is extremely difficult to detach from the limiting anti-detachment boss 21 after entering the limiting anti-detachment boss 21, thereby preventing the inner rod 2 and the outer rod 1 from accidentally detaching.

[0094] In order to ensure that the outer rod 1 still has the ability to deform when the outer rod 1 is made of a hard material, the outer rod 1 is provided with an extended gripping rod 12, and the matching end 11 is provided on the extended gripping rod 12;

[0095] In this embodiment, the outer rod 1 and the matching end 11 are both made of hard materials, but by extending the holding rod 12, the matching end 11 has a deformation force, and a delayed reset member 3 is also provided in the matching end 22. The elastic force requirement for the displacement reset member 4 can be much smaller, because the delayed reset member 3 will provide an elastic force to release the temporary matching state between the matching end 11 and the matching end 22, which will further accelerate the release of the temporary matching state between the matching end 11 and the matching end 22. In this embodiment, the elastic force requirement for the displacement reset member 4 is lower, and the force required for the overall core-out operation will also be appropriately reduced.

[0096] Since this embodiment does not have a release ramp 6, although the deformation force of the extended gripping rod of the outer rod 1 can also cause the mating end to separate from the mating end through the reset member, this method has a longer delay time, which is determined by the deformation force of the extended gripping rod 12 and the elastic force of the displacement reset member 4. To shorten the delay time, the inner rod 2 is partially made of elastic material, specifically the force-bearing protrusion 25 on the upper side of the mating end 22 of the inner rod 2. The force-bearing protrusion 25 is fixed to the inner rod 2 by integral molding or as a separate component. Thereby, the deformation disengagement force between the matching end 11 and the matching end 22 is reduced. Such bidirectional deformation disengagement can accelerate the matching end 11 to disengage from the matching end 22. In this way, even without the slow disengagement slope 6, a temporary matching relationship between the matching end 11 and the matching end 22 can be achieved, thereby achieving the effect of delayed automatic core retraction. Of course, the deformation opening 24 in Example 3 can also be used to make the inner rod 2 have deformation ability. This method mainly uses the deformation clamping force between the outer rod 1 and / or the inner rod 2 to achieve a temporary matching relationship between the matching end 11 and the matching end 22.

[0097] In this embodiment, the influence of the gradient of the relief slope 6 does not need to be considered, and only the influence of the deformation clamping force of the inner rod 2 and the outer rod 1 and the influence of the elastic force of the displacement reset member 4 need to be considered.

[0098] Example 6: As shown in Figures 11 and 12, a pen comprises an inner rod 2, an outer rod 1, a writing instrument body 5, and a displacement reset member 4. The inner rod 2 is provided with a position-limiting anti-slip boss 21 and a mating end 22, and the outer rod 1 is provided with a mating end 11; the mating end 11 is deformable; the mating end 22 is internally provided with a delayed reset member 3; the inner rod 2 and outer rod 1 are mutually nested; the writing instrument body 5 is located between the inner rod 2 and outer rod 1; in this embodiment, the writing instrument body 5 is a gel pen. To better prevent the inner rod 2 and outer rod 1 from easily separating after installation, the mating end 11 is not easily disengaged from the position-limiting anti-slip boss 21, but can be forcibly pulled apart when replacing the pen refill.

[0099] The mating end 11 slides between the mating end 22 and the position-limiting anti-dropout protrusion 21. When the core is ejected, the mating end 11 is located inside the mating end 22 to form a temporary engagement relationship. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed. The user holds the outer rod 1 to write normally, and the grip force of writing can prevent the mating end 11 from being separated from the mating end 22, thereby maintaining the core ejection state.

[0100] If the user does not apply force to the pen holding area of ​​the outer rod 1 and loses the writing grip, then after N seconds without the influence of external force, the delayed reset member 3 will restore the memory state, causing the matching end 11 to break away from the restriction of the matching end 22, and then through the influence of the displacement reset member 4, the writing tool body 5 will be retracted into the inner rod 2, which is now in the core-retracted state; and the matching end 11 breaks away from the matching end 22 and contacts the limiting anti-detachment boss 21, and the limiting anti-detachment boss 21 limits further displacement of the matching end 11 to prevent the inner rod 2 and the outer rod 1 from separating, thereby maintaining the core-retracted state.

[0101] The elastic force of the delayed return member 3 is greater than the deformation force of the above-mentioned matching end 11 or outer rod 1 or inner rod 2; however, the elastic force of the delayed return member 3 here is a slow rebound, which requires a certain deformation recovery time. Therefore, by controlling the slow rebound force of the delayed return member 3 and the deformation force of the matching end 11 or outer rod 1 or inner rod 2, the specific time "N" of delaying the automatic core retraction can be controlled.

[0102] Furthermore, the head of the inner rod 2 is provided with a detachable part 7, which is connected in a detachable manner such as a threaded connection. The refill is replaced by disassembling and assembling the detachable part 7, rather than by pulling it apart by force as described above, providing another way of replacing the refill. The restraining force of the anti-detachment boss 21 on the matching end 11 can be designed to be strengthened, so that the matching end 11 is extremely difficult to detach from the limiting anti-detachment boss 21 after entering the limiting anti-detachment boss 21, thereby preventing the inner rod 2 and the outer rod 1 from accidentally detaching.

[0103] For ease of installation, the displacement reset member 4 is located between the writing instrument body 5 and the inner rod 2. For ease of production, the delayed reset member 3 is made of an elastic material, and the displacement reset member 4 is a spring. To enhance the writing experience, the mating end 11 and the matching end 22 fit within the normal writing grip range of the user, specifically within 2-90 mm from the writing end of the writing instrument body 5.

[0104] In this embodiment, the outer rod 1 is made of a hard material, and the matching end 11 is made of an elastic material, which causes the matching end 11 to have a deformation force, and a delayed reset component 3 is also provided in the matching end 22. The elastic force requirement for the displacement reset component 4 can be much smaller, because the delayed reset component 3 will provide an elastic force to release the temporary fitting state between the matching end 11 and the matching end 22, which will further accelerate the release of the temporary fitting state between the matching end 11 and the matching end 22. In this embodiment, the elastic force requirement for the displacement reset component 4 is lower, and the force required for the overall core-out operation will also be appropriately reduced.

[0105] As a preferred embodiment of the present invention: in order to achieve better core extraction, the following two methods can be adopted:

[0106] Gripping the core: The inner rod 2 is provided with a gripping slope 81, the outer rod 1 is provided with a gripping portion 82, and the gripping portion 82 is further provided with a gripping boss 821;

[0107] Pulling out the core: A pulling portion 83 is provided on the inner rod 2.

[0108] The gripping portion 82 is deformable.

[0109] The core-pulling process refers to the user squeezing the grip portion 82, causing the grip portion 82 to deform, thereby causing the core-pulling projection 821 to squeeze the core-pulling slope 81. The core-pulling slope 81 itself has a guiding function, thereby causing the inner rod 2 or the outer rod 1 to move toward the center, thereby causing the writing instrument body 5, i.e., the refill, to be exposed from the inner rod 2, achieving the core-pulling effect.

[0110] Pulling out the core means that the user keeps the outer rod 1 stationary and uses the pulling portion 83 to move the inner rod 2 or the outer rod 1 toward the center, thereby causing the writing tool body 5 to expose the inner rod, achieving the effect of pulling out the core.

[0111] The above-mentioned core-out method is mainly used to manipulate the inner rod 2 or the outer rod 1 to move a certain stroke. When the designed stroke is reached, how the structure maintains the core-out is another problem that needs to be solved in this case, that is, the technology of delayed automatic core retraction; by setting parameters between the matching end 11 and the mating end 22 or adding a delayed reset part 3, etc., it is better to ensure that the user can write normally while achieving the purpose of delayed automatic core retraction.

[0112] The above-mentioned pulling out the core and holding the core can both solve the core-out problem quickly and conveniently. Then, through the temporary locking structure of this case, it can ensure that the user can have a good writing experience when using it.

[0113] Because the core ejection needs to meet a certain moving stroke, the normal range is 3-12mm. The specific core ejection stroke is different depending on the main body of the writing tool. The slope of the above-mentioned core ejection slope 81 and the specific core ejection moving stroke affect the pressing depth stroke of the core ejection boss 821. According to the Pythagorean theorem, if the required core ejection moving stroke is inconvenient, the greater the slope of the core ejection slope 81, the greater the required pressing depth stroke. However, the actual force required to press and hold the core ejection boss 821 will also be smaller; therefore, when the pressing depth stroke is sufficient, minimizing the actual force required to press and hold the core ejection boss 821 can better improve the user's comfort in holding the core ejection. Therefore, when the pressing depth stroke is sufficient and the internal space allows, the slope of the core ejection slope 81 is as large as possible, and the user's comfort in holding the core ejection will be better.

[0114] Example 7: A pen as shown in Figures 13 to 14 includes an inner rod 2, an outer rod 1, a writing tool body 5 and a displacement reset member 4. The inner rod 2 is provided with a limit anti-slip boss 21 and a mating end 22, and the outer rod 1 is provided with a mating end 11; the outer rod 1 and the inner rod 2 are also sleeved with a delayed reset member 3; the outer rod 1 has the ability to deform; the inner rod 2 and the outer rod 1 fit together; the writing tool body 5 is located between the inner rod 2 and the outer rod 1; in this embodiment, the writing tool body 5 is a fluorescent pen. The mating end 11 slides between the mating end 22 and the limit anti-slip boss 21. When the core is ejected, the mating end 11 is located in the mating end 22 to form a temporary fit. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed; the user holds the outer rod 1 in hand to write normally, and the writing grip force can prevent the mating end 11 from being separated from the mating end 22, thereby maintaining the core ejection state;

[0115] If the user does not apply force to the pen holding area of ​​the outer rod 1 and loses the writing grip, then in the absence of external force, the matching end 11 will slowly disengage from the engagement state with the matching end 22 under the influence of the displacement reset member 4, and the delayed reset member 3 will slowly prevent the matching end 11 from slowly disengaging from the engagement state with the matching end 22. After N seconds, when the matching end 11 is completely disengaged from the matching end 22, the writing tool body 5 will be retracted into the inner rod 2, and this is the core-retracted state; and when the matching end 11 is disengaged from the matching end 22 and contacts the limit anti-detachment boss 21, the limit anti-detachment boss 21 limits further displacement of the matching end 11 to prevent the inner rod 2 and the outer rod 1 from separating, thereby maintaining the core-retracted state.

[0116] If the user does not apply force to the pen-holding area of ​​the outer rod 1, the elastic force of the delayed reset member 3 is greater than the deformation force of the above-mentioned matching end 11 or the outer rod 1 or the inner rod 2 due to the influence of the displacement reset member 4; however, the elastic force of the delayed reset member 3 here is a slow rebound, which requires a certain deformation recovery time. Therefore, by controlling the slow rebound force of the delayed reset member 3 and the deformation force of the matching end 11 or the outer rod 1 or the inner rod 2, the specific time "N" of delaying the automatic core retraction can be controlled.

[0117] The displacement restoring member 4 is located between the outer rod 1 and the inner rod 2 ; the tail of the writing tool body 5 is to be clamped on the tail of the outer rod 1 .

[0118] The delayed reset member 3 is made of elastic material or elastic structure, which can better control the delay time of automatic core retraction and increase the service life of the automatic core retraction delay function. The displacement reset member 4 is made of elastic material or elastic structure.

[0119] The matching range of the matching end 11 and the matching end 22 is the normal pen-holding range of the user during normal writing, specifically within 2-90 mm from the writing end of the writing tool body 5.

[0120] Furthermore, the tail of the outer rod 1 is provided with a detachable part 7, which is connected in a detachable manner such as a threaded connection. The pen refill is replaced by disassembling and assembling the detachable part 7. Therefore, when the matching end 11 enters the limit anti-detachment boss 21, the above-mentioned matching end 11 is extremely difficult to separate from the limit anti-detachment boss 21, thereby preventing the inner rod 2 and the outer rod 1 from accidentally separating.

[0121] In order to ensure that the outer rod 1 still has the ability to deform when the outer rod 1 is made of a hard material, the outer rod 1 is provided with an extended gripping rod 12, and the matching end 11 is provided on the extended gripping rod 12;

[0122] In order to ensure that the pen holding area still has a better supporting effect when holding the pen while writing when the extended holding rod 12 is provided, and to save more space when the delayed return member 3 is sleeved on the outer rod 1, the above-mentioned inner rod 2 is also provided with a holding support boss 23 for accommodating the extended holding rod 12. This can ensure that the pen holding area still has a better supporting effect, and can also ensure that the delayed return member 3 can be sleeved on the outer rod 1 and the inner rod 2 in a more space-saving manner.

[0123] In this embodiment, the outer rod 1 is made of a hard material, and the gripping rod 12 is extended by an elastic structure so that both the mating end 11 and the outer rod 1 have a deformation force;

[0124] The delayed return member 3 is sleeved outside the outer rod 1 and the inner rod 2, which can provide better contraction force to the extended gripping rod 12 and the matching end 11. Through the additional contraction force, the delayed return member 3 will provide a contraction force to prevent the temporary fit between the matching end 11 and the mating end 22 from being released, further delaying the release of the temporary fit between the matching end 11 and the mating end 22. In this embodiment, the elastic force requirement of the displacement return member 4 is higher, and the force required for the overall core removal operation will also increase appropriately. For better fit, it is best that the matching end 11 is made of a hard material, so that the sliding effect between it and the inner rod 2 is better.

[0125] By placing the delayed reset member 3 outside the outer rod 1 and inner rod 2, the effectiveness of the delayed automatic retraction can be guaranteed while significantly saving space within the inner rod 2, allowing for easier installation and landing, while also reducing the requirements for structural materials. Furthermore, the delayed reset member 3 can also serve as a soft rubber cover for the pen, saving a component while improving comfort.

[0126] In order to achieve better core output, the following methods can be used:

[0127] Gripping the core: The inner rod 2 is provided with a gripping slope 81, the outer rod 1 is provided with a gripping portion 82, and the gripping portion 82 is further provided with a gripping boss 821;

[0128] Pulling out the core: A pulling portion 83 is provided on the inner rod 2.

[0129] The gripping portion 82 is deformable.

[0130] The core-pulling process refers to the user squeezing the grip portion 82, causing the grip portion 82 to deform, thereby causing the core-pulling projection 821 to squeeze the core-pulling slope 81. The core-pulling slope 81 itself has a guiding function, thereby causing the inner rod 2 or the outer rod 1 to move toward the center, thereby causing the writing instrument body to expose the inner rod 2, achieving the core-pulling effect;

[0131] Pulling out the core means that the user keeps the outer rod 1 stationary and uses the pulling portion 83 to move the inner rod or the outer rod 1 toward the center, thereby causing the writing tool body to expose the inner rod 2 and achieve the effect of pulling out the core.

[0132] The above-mentioned core-out method is mainly used to manipulate the inner rod 2 or the outer rod 1 to move a certain stroke. When the designed stroke is reached, how the structure maintains the core-out is another problem that needs to be solved in this case, that is, the technology of delayed automatic core retraction; by setting parameters between the matching end 11 and the mating end 22 or adding a delayed reset part 3, etc., it is better to ensure that the user can write normally while achieving the purpose of delayed automatic core retraction.

[0133] The above-mentioned pulling out the core and holding the core can both solve the core-out problem quickly and conveniently. Then, through the temporary locking structure of this case, it can ensure that the user can have a good writing experience when using it.

[0134] Because the core ejection needs to meet a certain moving stroke, the normal range is 3-12mm. The specific core ejection stroke is different depending on the main body of the writing tool. The slope of the above-mentioned core ejection slope 81 and the specific core ejection moving stroke affect the pressing depth stroke of the core ejection boss 821. According to the Pythagorean theorem, if the required core ejection moving stroke is inconvenient, the greater the slope of the core ejection slope 81, the greater the required pressing depth stroke. However, the actual force required to press and hold the core ejection boss 821 will also be smaller; therefore, when the pressing depth stroke is sufficient, minimizing the actual force required to press and hold the core ejection boss 821 can better improve the user's comfort in holding the core ejection. Therefore, when the pressing depth stroke is sufficient and the internal space allows, the slope of the core ejection slope 81 is as large as possible, and the user's comfort in holding the core ejection will be better.

[0135] In order to simplify the structure and facilitate actual production and processing, the holding portion 82 and the extended holding rod 12, the above-mentioned holding core-out slope 81 and the matching end 22, and the holding core-out boss 821 and the matching end 11 have the same structure, which can simultaneously meet the use structure of pulling out the core and holding out the core.

[0136] Embodiment 8: A pen as shown in Figures 15 to 16 includes an inner rod 2, an outer rod 1, a writing tool body 5 and a displacement reset part 4. The outer rod 1 is provided with a limit anti-slip boss 21 and a mating end 22, and the inner rod 2 is provided with a matching end 11; the outer rod 1 and the inner rod 2 are also sleeved with a delayed reset part 3; the inner rod 2 has the ability to deform; the inner rod 2 and the outer rod 1 are sleeved with each other; the writing tool body 5 is located between the inner rod 2 and the outer rod 1; in this embodiment, the writing tool body 5 is a gel pen.

[0137] The mating end 11 slides between the mating end 22 and the position-limiting anti-dropout protrusion 21. When the core is ejected, the mating end 11 is located inside the mating end 22 to form a temporary engagement relationship. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed. The user holds the outer rod 1 to write normally, and the grip force of writing can prevent the mating end 11 from being separated from the mating end 22, thereby maintaining the core ejection state.

[0138] If the user does not apply force to the pen holding area of ​​the outer rod 1 and loses the writing grip, then in the absence of external force, the matching end 11 will slowly disengage from the engagement state with the matching end 22 through the influence of the displacement reset member 4, and the delayed reset member 3 will slowly prevent the matching end 11 from slowly disengaging from the engagement state with the matching end 22. After N seconds, when the matching end 11 is completely disengaged from the matching end 22, the writing tool body 5 will be retracted into the inner rod 2, and this is the core-retracted state; and when the matching end 11 is disengaged from the matching end 22 and contacts the limit anti-detachment boss 21, the further displacement of the matching end 11 is limited by the limit anti-detachment boss 21 to prevent the inner rod 2 and the outer rod 1 from separating, thereby maintaining the core-retracted state.

[0139] The elastic force of the delayed return member 3 is greater than the deformation force of the above-mentioned matching end 11 or outer rod 1 or inner rod 2; however, the elastic force of the delayed return member 3 here is a slow rebound, which requires a certain deformation recovery time. Therefore, by controlling the slow rebound force of the delayed return member 3 and the deformation force of the matching end 11 or outer rod 1 or inner rod 2, the specific time "N" of delaying the automatic core retraction can be controlled.

[0140] By delaying the reset element 3 , the delay time of the automatic core retraction can be better controlled, and the service life of the delay function of the automatic core retraction can be increased.

[0141] The above-mentioned displacement reset member 4 is located between the outer rod 1 and the inner rod 2; the tail of the writing tool body 5 is to be clamped in the tail of the outer rod 1. The above-mentioned delayed reset member 3 is composed of an elastic material or an elastic structure, and the above-mentioned displacement reset member 4 is composed of an elastic material or an elastic structure. The matching range of the above-mentioned matching end 11 and the matching end 22 is the normal pen-holding range of the user during normal writing, specifically within 2-90 mm from the writing end of the writing tool body 5. By placing the delayed reset member 3 outside the outer rod 1 and the inner rod 2, it can not only ensure the timeliness of the delayed automatic retraction, but also greatly save the internal space of the inner rod 2, and better install and implement the landing, and the requirements for the structural material will also be reduced accordingly. In addition, the delayed reset member 3 can also be used as a soft rubber cover for the pen, which can save a component while improving greater comfort.

[0142] In order to achieve better core output, the following methods can be used:

[0143] Gripping the core: The outer rod 1 is provided with a gripping slope 81, the inner rod 2 is provided with a gripping portion 82, and the gripping portion 82 is further provided with a gripping boss 821;

[0144] Pulling out the core: A pulling portion 83 is provided on the inner rod 2.

[0145] The gripping portion 82 is deformable.

[0146] The core-pulling process refers to the user squeezing the grip portion 82, causing the grip portion 82 to deform, thereby causing the core-pulling projection 821 to squeeze the core-pulling slope 81. The core-pulling slope 81 itself has a guiding function, thereby causing the inner rod 2 or the outer rod 1 to move toward the center, thereby causing the writing instrument body to expose the inner rod 2, achieving the core-pulling effect;

[0147] Pulling out the core means that the user keeps the outer rod 1 stationary and uses the pulling portion 83 to move the inner rod 2 or the outer rod 1 toward the center, thereby causing the writing tool body to expose the inner rod 2, achieving the effect of pulling out the core.

[0148] The above-mentioned core-out method is mainly used to manipulate the inner rod 2 or the outer rod 1 to move a certain stroke. When the designed stroke is reached, how the structure maintains the core-out is another problem that needs to be solved in this case, that is, the technology of delayed automatic core retraction; by setting parameters between the matching end 11 and the mating end 22 or adding a delayed reset part 3, etc., it is better to ensure that the user can write normally while achieving the purpose of delayed automatic core retraction.

[0149] The above-mentioned pulling out the core and holding the core can both solve the core-out problem quickly and conveniently. Then, through the temporary locking structure of this case, it can ensure that the user can have a good writing experience when using it.

[0150] Because the core ejection needs to meet a certain moving stroke, the normal range is 3-12mm. The specific core ejection stroke is different depending on the main body of the writing tool. The slope of the above-mentioned core ejection slope 81 and the specific core ejection moving stroke affect the pressing depth stroke of the core ejection boss 821. According to the Pythagorean theorem, if the required core ejection moving stroke is inconvenient, the greater the slope of the core ejection slope 81, the greater the required pressing depth stroke. However, the actual force required to press and hold the core ejection boss 821 will also be smaller; therefore, when the pressing depth stroke is sufficient, minimizing the actual force required to press and hold the core ejection boss 821 can better improve the user's comfort in holding the core ejection. Therefore, when the pressing depth stroke is sufficient and the internal space allows, the slope of the core ejection slope 81 is as large as possible, and the user's comfort in holding the core ejection will be better.

[0151] Furthermore, a ball bearing 84 is provided between the core-holding boss 821 and the core-holding slope 81 to enhance the user's comfort in holding the core. Furthermore, the core-holding boss 821 and the mating end 11 share the same structure, enabling both core-holding and core-pulling functions, simplifying the structure and facilitating actual production and processing.

[0152] Embodiment 9: As shown in Figures 17 and 18, a pen comprises an inner rod 2, an outer rod 1, a writing instrument body 5, and a displacement reset member 4. The inner rod 2 is provided with a position-limiting anti-slip boss 21 and a mating end 22, and the outer rod 1 is provided with a matching end 11; the matching end 11 is deformable; the delayed reset member 3 is positioned within the matching end 22 and has elastic force; the inner rod 2 and outer rod 1 are fitted together; the writing instrument body 5 is located between the inner rod 2 and outer rod 1; in this embodiment, the writing instrument body 5 is a fountain pen. To better prevent the inner rod 2 and outer rod 1 from easily separating after installation, the matching end 11 is not easily separated from the position-limiting anti-slip boss 21, but can be forcibly pulled apart when replacing the pen refill.

[0153] The mating end 11 slides between the mating end 22 and the position-limiting anti-dropout protrusion 21. When the core is ejected, the mating end 11 is located inside the mating end 22 to form a temporary engagement relationship. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed. The user holds the outer rod 1 to write normally, and the grip force of writing can prevent the mating end 11 from being separated from the mating end 22, thereby maintaining the core ejection state.

[0154] If the user does not apply force to the pen-holding area of ​​the outer rod 1 and loses the writing grip, then in the absence of external force, after N seconds, the delayed reset member 3 will restore the memory state, causing the matching end 11 to break away from the restriction of the matching end 22, and then through the influence of the displacement reset member 4, the writing tool body 5 will be retracted into the inner rod 2, which is now in the core-retracted state; and when the matching end 11 breaks away from the matching end 22 and contacts the limiting anti-detachment boss 21, the limiting anti-detachment boss 21 can limit the further displacement of the matching end 11 to prevent the inner rod 2 and the outer rod 1 from separating, thereby maintaining the core-retracted state.

[0155] The elastic force of the delayed return member 3 is greater than the deformation force of the above-mentioned matching end 11 or outer rod 1 or inner rod 2; however, the elastic force of the delayed return member 3 here is a slow rebound, which requires a certain deformation recovery time. Therefore, by controlling the slow rebound force of the delayed return member 3 and the deformation force of the matching end 11 or outer rod 1 or inner rod 2, the specific time "N" of delaying the automatic core retraction can be controlled.

[0156] Furthermore, the tail of the outer rod 1 is provided with a detachable part 7, which is connected in a detachable manner such as a threaded connection. The pen refill is replaced by disassembling and assembling the detachable part 7. Therefore, when the matching end 11 enters the limit anti-detachment boss 21, the above-mentioned matching end 11 is extremely difficult to separate from the limit anti-detachment boss 21, thereby preventing the inner rod 2 and the outer rod 1 from accidentally separating.

[0157] For ease of installation, the displacement reset member 4 is located between the writing instrument body 5 and the inner rod 2. For ease of production, the delayed reset member 3 is made of an elastic material, and the displacement reset member 4 is a spring. To enhance the writing experience, the mating end 11 and the matching end 22 fit within the normal writing grip range of the user, specifically within 2-90 mm from the writing end of the writing instrument body 5. In order to ensure that the outer rod 1 still has the ability to deform when the outer rod 1 is made of hard material, an extended gripping rod 12 is provided on the outer rod 1, and the matching end 11 is provided on the extended gripping rod 12; in this embodiment, the outer rod 1 and the matching end 11 are both made of hard material, but the extending gripping rod 12 causes the matching end 11 to have a deformation force, and a delayed reset member 3 is also provided in the matching end 22, so the elastic force requirement for the displacement reset member 4 can be much smaller, because the delayed reset member 3 will provide an elastic force to release the temporary mating state between the matching end 11 and the matching end 22, which will further accelerate the release of the temporary mating state between the matching end 11 and the matching end 22. Under this embodiment, the elastic force requirement for the displacement reset member 4 is lower, and the force required for the overall core-out operation will also be appropriately reduced.

[0158] As a preferred embodiment of the present invention: in order to achieve better core extraction, the following two methods can be adopted:

[0159] Gripping the core: The inner rod 2 is provided with a gripping slope 81, the outer rod 1 is provided with a gripping portion 82, and the gripping portion 82 is further provided with a gripping boss 821;

[0160] Pulling out the core: A pulling portion 83 is provided on the inner rod 2.

[0161] The gripping portion 82 is deformable.

[0162] The core-pulling process refers to the user squeezing the grip portion 82, causing the grip portion 82 to deform, thereby causing the core-pulling projection 821 to squeeze the core-pulling slope 81. The core-pulling slope 81 itself has a guiding function, thereby causing the inner rod 2 or the outer rod 1 to move toward the center, thereby causing the writing instrument body 5 to expose the inner rod, achieving the core-pulling effect;

[0163] Pulling out the core means that the user keeps the outer rod 1 stationary and uses the pulling portion 83 to move the inner rod 2 or the outer rod 1 toward the center, thereby causing the writing tool body 5 to expose the inner rod, achieving the effect of pulling out the core.

[0164] The above-mentioned core-out method is mainly used to manipulate the inner rod 2 or the outer rod 1 to move a certain stroke. When the designed stroke is reached, how the structure maintains the core-out is another problem that needs to be solved in this case, that is, the technology of delayed automatic core retraction; by setting parameters between the matching end 11 and the mating end 22 or adding a delayed reset part 3, etc., it is better to ensure that the user can write normally while achieving the purpose of delayed automatic core retraction.

[0165] The above-mentioned pulling out the core and holding the core can both solve the core-out problem quickly and conveniently. Then, through the temporary locking structure of this case, it can ensure that the user can have a good writing experience when using it.

[0166] Because the core ejection needs to meet a certain moving stroke, the normal range is 3-12mm. The specific core ejection stroke is different depending on the main body of the writing tool. The slope of the above-mentioned core ejection slope 81 and the specific core ejection moving stroke affect the pressing depth stroke of the core ejection boss 821. According to the Pythagorean theorem, if the required core ejection moving stroke is inconvenient, the greater the slope of the core ejection slope 81, the greater the required pressing depth stroke. However, the actual force required to press and hold the core ejection boss 821 will also be smaller; therefore, when the pressing depth stroke is sufficient, minimizing the actual force required to press and hold the core ejection boss 821 can better improve the user's comfort in holding the core ejection. Therefore, when the pressing depth stroke is sufficient and the internal space allows, the slope of the core ejection slope 81 is as large as possible, and the user's comfort in holding the core ejection will be better. In order to simplify the structure and facilitate actual production and processing, the holding portion 82 and the extended holding rod 12, the core holding boss 821 and the matching end 11 have the same structure, which can simultaneously meet the use of pulling out the core and holding the core.

[0167] Example 10: As shown in Figures 19 and 20, a pen comprises a retractable writing rod and a writing instrument body 5. The writing rod comprises an inner rod 2 and an outer rod 1. The writing instrument body 5 is mounted within the writing rod. Depending on the retractable state of the writing rod, the writing instrument body 5 can have two positions: a second position B for retracting the writing rod and a first position A for extending the writing rod. The inner rod 2 and the outer rod 1 temporarily engage with each other at their mating ends 22 and 11, combined with the user's grip during use, to form a continuous engagement state for extending the writing rod. When the user's grip disappears, the mating ends 22 and 11 begin to move away from each other a certain distance, either immediately or after a delay of N seconds. At this point, the writing instrument body 5 fully retracts the writing rod. The inner rod 2 has a mating end 22, and the outer rod 1 has a mating end 11. When the writing rod is in the retractable state, a reset structure is provided between the inner rod 2 and the outer rod 1. The reset structure can be injection-molded using a conventional two-shot injection molding machine. The tail end of the inner rod 2 is made of an elastic material.

[0168] The outer rod 1 and the inner rod 2 are also sleeved with a delayed return member 3, which has a contraction elastic force and one end of which is clamped and fixed to the outer rod 1 / inner rod 2; the matching end 11 and / or the mating end 22 are also provided with a slow release slope 6; the outer rod 1 has the ability to deform; the inner rod 2 and the outer rod 1 are sleeved with each other; the writing tool body 5 is located between the inner rod 2 and the outer rod 1; in this embodiment, the writing tool body 5 is a fluorescent pen.

[0169] The mating end 11 slides between the mating end 22 and the position-limiting anti-dropout protrusion 21. When the core is ejected, the mating end 11 is located inside the mating end 22 to form a temporary mating relationship. At this time, the distance between the inner rod 2 and the outer rod 1 is shortened, and the writing tool body 5 is in a state where the inner rod 2 is exposed. The user holds the outer rod 1 to write normally, and the grip force of writing can prevent the mating end 11 from being separated from the mating end 22, thereby maintaining the core ejection state.

[0170] If the user does not apply force to the pen holding area of ​​the outer rod 1 and loses the writing grip, then in the absence of external force, through the reset structure at the tail of the inner rod 2 and the influence of the slow release slope 6, the matching end 11 will slowly disengage from the engaged state with the matching end 22, and the delayed reset member 3 will slowly prevent the matching end 11 from disengaging from the engaged state with the matching end 22. After N seconds, the matching end 11 is completely disengaged from the matching end 22 to release the temporary engagement relationship, and the writing tool body 5 is retracted into the inner rod 2. At this time, it is in the core-retracted state, and when the matching end 11 disengages from the matching end 22 and contacts the limit anti-disengagement boss 21, the limit anti-disengagement boss 21 can limit the further displacement of the matching end 11 to prevent the inner rod 2 and the outer rod 1 from separating, thereby maintaining the core-retracted state.

[0171] The elastic force of the delayed reset member 3 is less than the elastic force of the reset structure at the tail of the inner rod 2, but is affected by the slow-release slope 6, which can achieve the actual effect of slow release. The setting of the above-mentioned slow-release slope 6 can increase the friction between the inner rod 2 and the outer rod 1. Through the friction between the slow-release slope 6 and the inner rod 2 or the outer rod 1, a certain elastic force of the reset structure at the tail of the inner rod 2 can be offset. Moreover, as the contact area between the slow-release slope 6 and the inner rod 2 or the outer rod 1 decreases, the friction between the slow-release slope 6 and the inner rod 2 or the outer rod 1 will also decrease, thereby achieving a damping-like effect. By controlling the friction, the delayed reset member 3 and the elastic force of the displacement reset member 4, the specific time "N" of delaying the automatic core retraction can be controlled.

[0172] The tail of the writing tool body 5 is to be clamped on the tail of the outer rod 1. The delayed reset part 3 is composed of an elastic material or an elastic structure. The delayed reset part 3 can better control the delay time of the automatic retraction, and increase the service life of the delay function of the automatic retraction. The matching range of the matching end 11 and the matching end 22 is the normal pen holding range of the user during normal writing, specifically within 2-90 mm from the writing end of the writing tool body 5. Furthermore, the tail of the outer rod 1 is set as a detachable part 7, which is connected in a detachable manner such as a threaded connection. The pen core is replaced by disassembly and assembly at the detachable part 7. Therefore, when the matching end 11 enters the limiting anti-detachment boss 21, it is extremely difficult for the matching end 11 to separate from the limiting anti-detachment boss 21, thereby preventing the inner rod 2 and the outer rod 1 from accidentally separating.

[0173] In order to make the core ejection smoother, the inner rod 2 and the outer rod 1 are provided with an auxiliary slope 8, and the auxiliary slope 8 is located at the transition point where the matching end 11 moves from the second position to the first position, so that the matching end 11 can move smoothly; when the outer rod 1 is made of hard material, the outer rod 1 still has the ability to deform, and the front end of the outer rod 1 is provided with a plurality of extended gripping rods 12, and the matching end 11 is provided at the inner end of the extended gripping rod 12; the inner rod 2 is also provided with a gripping support boss 23 for accommodating the extended gripping rod 12, which can not only ensure that the pen holding area still has a better support effect, but also ensure that the delayed reset component 3 can be more space-savingly sleeved on the outside of the outer rod 1 and the inner rod 2.

[0174] In this embodiment, the outer rod 1 is made of a hard material, and the gripping rod 12 is extended by an elastic structure, so that both the mating end 11 and the outer rod 1 have a deformation force. The delayed return member 3 is sleeved outside the outer rod 1 and the inner rod 2, which can provide a better contraction force for the extended gripping rod 12 and the mating end 11. Through the additional contraction force, the delayed return member 3 will provide a contraction force to prevent the temporary mating state between the mating end 11 and the mating end 22 from being released, which will further delay the release of the temporary mating state between the mating end 11 and the mating end 22. In this embodiment, the elasticity requirement for the reset structure at the tail of the inner rod 2 is higher, and the force required for the overall core removal operation will also increase appropriately. For better fit, it is best if the mating end 11 is made of a hard material, so that the sliding effect between the inner rod 2 is better.

[0175] By placing the delayed reset member 3 outside the outer rod 1 and the inner rod 2, it is possible to ensure the timeliness of the delayed automatic retraction, greatly save the internal space of the inner rod 2, and better install and implement the landing. At the same time, the requirements for structural materials will be reduced accordingly. In particular, the requirements for the coordination of the slow-release slope 6 are improved, and the durability of the overall automatic retraction is improved, so that a longer delayed automatic retraction time can be achieved, which can be extended to 0.5 to 60 seconds, depending on the specific actual parameters; however, if the delay time is too long, the anti-fall effect will be lost. In addition, the delayed reset member 3 can also be used as a soft rubber cover for the pen, which can save a component while improving greater comfort.

[0176] Supplementary explanation: According to the above embodiments, the present invention mainly utilizes the deformation force of the inner rod, outer rod or matching end, and the elastic force of the reset member to perform specific time control of the delay of automatic retraction, and the delayed reset member can be known from different embodiments. The delayed reset member will provide two completely different forces, memory reset force or contraction force, according to the different changes in its position in the entire structure. The specific effect is determined by its position characteristics and the actual effect required; and the main purpose of delayed automatic retraction is to give the user a switching gesture so that after pulling out the retract, he or she will have enough time to hold the pen holding area, thereby ensuring that the delayed retraction of the automatic retract will not be activated. When the user holds the pen holding area, he or she will continue to apply pressure to the outer rod, inner rod and / or delayed reset member, so that the pen retract will not trigger the delayed automatic retraction when writing, and due to the overall structural design, no excessive additional force is required when writing. There is no force to limit the triggering of automatic retraction. You only need to hold the pen normally and write with a slight clamping force to ensure normal writing. Moreover, due to the delayed automatic retraction, even if the user briefly adjusts the grip, it will trigger the automatic retraction, thereby improving the overall writing experience. When the user has finished writing or has not held the pen for a long time, the delayed automatic retraction will be slowly triggered. At this time, it can be ensured that the pen core is in the retracted state most of the time when not writing. Moreover, if the delayed automatic retraction time can be controlled within 0.5-3 seconds, it can play an additional anti-fall role, because most of the normal pens fall when they are placed on the desktop and roll down or fall accidentally, and most of the time it takes about 1-3 seconds to fall to the ground. Therefore, a variety of similar structures can be designed according to different customer groups and usage habits to meet the different usage needs and actual usage scenarios of different users.

Claims

1. A delayed reset holding pen, characterized in that: It includes a telescopic writing sleeve rod and a writing tool body (5). The writing sleeve rod includes an inner rod (2) and an outer rod (1). The writing tool body (5) is installed inside the writing sleeve rod. According to the telescopic state of the writing sleeve rod, the writing tool body (5) has two position states: retracting the core at the second position B and extending the core at the first position A. The inner rod (2) and the outer rod (1) are combined by the temporary fitting state between the fitting end (22) and the matching end (11) with the holding force of the user during use to form a continuous core-extending fitting state. When the holding force of the user disappears, the fitting end (22) and the matching end (11) will start to move away from each other by a certain distance immediately or after a delay of N seconds. At this time, the writing tool body (5) will be completely retracted into the writing sleeve rod.

2. A pen with delayed reset and holding function, characterized in that: It includes an inner rod (2), an outer rod (1), a writing tool body (5) and a displacement resetting member (4). The inner rod (2) and the outer rod (1) are sleeved with each other and can move relatively / oppositely. The writing tool body (5) is located between the inner rod (2) and the outer rod (1), and the writing tool body (5) is reset for the relative / opposite movement between the inner rod (2) and the outer rod (1) through the displacement resetting member (4). The inner rod (2) is provided with a fitting end (22), and the outer rod (1) is provided with a matching end (11). As the inner rod (2) and the outer rod (1) move relatively and sleeved with each other, when the matching end (11) moves to the first position of the fitting end (22), the pen extends the core and maintains the core-extending state through the writing holding force. When the writing holding force is lost, the matching end (11) slowly disengages from the first position (A) and is automatically reset to the second position (B) to retract the core through the displacement resetting member (4).

3. A delayed reset holding pen, characterized in that: It includes an inner rod (2), an outer rod (1), a writing tool body (5) and a displacement resetting member (4). The inner rod (2) and the outer rod (1) are sleeved with each other and can move relatively / oppositely. The writing tool body (5) is located between the inner rod (2) and the outer rod (1), and the writing tool body (5) is reset for the relative / opposite movement between the inner rod (2) and the outer rod (1) through the displacement resetting member (4). The outer rod (1) is provided with a fitting end (22), and the inner rod (2) is provided with a matching end (11). As the inner rod (2) and the outer rod (1) move relatively and sleeved with each other, when the matching end (11) moves to the first position of the fitting end (22), the pen extends the core and maintains the core-extending state through the writing holding force. When the writing holding force is lost, the matching end (11) slowly disengages from the first position (A) and is automatically reset to the second position (B) to retract the core through the displacement resetting member (4).

4. The delayed reset holding pen according to claim 1, wherein: When either the inner rod (2) or the outer rod (1) is separately provided with a fitting end (22), the other is provided with a matching end (11).

5. The one kind of holding pen with delayed reset according to any one of claims 1 to 3, characterized in that: If the writing sleeve rod is in a reset telescopic state, a reset structure is provided between the inner rod (2) and the outer rod (1), or a displacement resetting member (4) is provided between the inner rod (2) and the outer rod (1), or the inner rod (2) and the outer rod (1) are driven by the writing tool body (5). The displacement resetting member (4) is provided between the core outlet of the writing sleeve rod and the writing end of the writing tool body (5).

6. A delayed reset holding pen according to any one of claims 1 to 3, characterized in that: The matching end (11) and / or the outer rod (1) and / or the inner rod (2) have the ability to deform, and the specific detachment duration is controlled by the deformation degree of the matching end (11) and / or the outer rod (1) and / or the inner rod (2).

7. The one kind of pen for delaying resetting and holding according to any one of claims 1 to 3, characterized in that: The mating end (22) and the matching end (11) form a temporary mating state through a snap structure or a delayed mating structure to generate a frictional force or a damping force.

8. The delay-resetting grip pen according to claim 7, characterized in that: The delayed mating structure can be realized by the following methods:

1. Protrusions are provided on both the mating end (22) and the matching end (11), so that a mating frictional force is formed between the mating end (22) and the matching end (11).

2. A viscous substance is provided on either the mating end (22) and / or the matching end (11); then a mating damping force is formed between the mating end (22) and the matching end (11).

3. A use groove is provided on the mating end (22), a mating boss is provided on the matching end (11), and a slow detachment slope (6) is provided on the use groove and / or the mating boss.

4. A use groove is provided on the matching end (11), a mating boss is provided on the mating end (22), and a slow detachment slope (6) is provided on the use groove and / or the mating boss.

5. Anti-slip patterns are provided on both the mating end (22) and the matching end (11), so that a mating frictional force is formed between the mating end (22) and the matching end (11).

6. An inner slope is provided on the matching end (11), an outer slope matching the inner slope is provided on the mating end (22), the matching end (11) and / or the mating end (22) have a deformation force. Under the writing holding force, the inner slope and the outer slope maintain a large-area contact to generate a frictional force. With a certain additional holding force, at this time, the writing tool body (5) maintains the state of exposing the pen tip. When there is no writing holding force, when the contact between the inner slope and the outer slope gradually decreases, the writing tool body (5) gradually returns to the core-receiving state.

7. A use groove is provided separately on either the matching end (11) or the mating end (22), a mating boss is provided on the other, a slow detachment slope (6) is provided on the mating boss, and the delayed reset member (3) is sleeved outside the outer rod (1) and the inner rod (2); under the writing holding force, the mating boss remains in the use groove. When there is no writing holding force, the delayed reset member (3) slowly prevents the mating boss from detaching from the use groove.

9. The delay-resetting grip pen according to any one of claims 3, wherein: It further includes a delayed reset member (3). The mating end (22) and the matching end (11) are of a snap structure. A use groove is provided separately on either the matching end (11) or the mating end (22), a mating boss is provided on the other, and the delayed reset member (3) is placed in the use groove; under the writing holding force, the delayed reset member (3) deforms to keep the mating boss in the use groove. When there is no writing holding force, the delayed reset member (3) slowly rebounds to make the mating boss slowly detach from the use groove.

10. A delayed reset holding pen according to any one of claims 1 to 3, characterized in that: The matching end (22) and the mating end (11) do not cooperate with each other when retracting the core, and will reach a temporary cooperation state when the core is ejected; the temporary cooperation state means that when there is no external force interfering with the inner rod (2) and the outer rod (1), the matching end (22) and the mating end (11) will immediately separate or start to separate from their original temporary cooperation state after a delay of N seconds.

11. A delayed reset gripping pen according to any one of claims 1 to 3, characterized in that: The temporary cooperation state formed between the matching end (11) and the mating end (22) has an external inhibition area (C). When an additional force is applied to the external inhibition area (C) by an external force, the temporary cooperation state formed between the matching end (11) and the mating end (22) will be continuously inhibited.

12. A holding pen with delayed reset according to any one of claims 1 to 3, characterized in that: A limiting and anti-disengagement boss (21) is provided on the inner rod (2) and / or the outer rod (1).

13. A pen with delayed reset and holding function according to any one of claims 1 to 3, characterized in that: It further includes a delaying reset member (3); The delaying reset member (3) is placed inside the mating end (22); under the writing holding force, the delaying reset member (3) deforms to keep the matching end (11) located inside the mating end (22). When there is no writing holding force, the delaying reset member (3) slowly rebounds to make the matching end (11) slowly disengage from the mating end (22); Alternatively, the delaying reset member (3) is sleeved outside the outer rod (1) and the inner rod (2); under the writing holding force, the matching end (11) is kept located inside the mating end (22). When there is no writing holding force, the delaying reset member (3) slowly prevents the matching end (11) from disengaging from the mating end (22).

14. A pen with delaying reset and holding function according to any one of claims 1 to 3, characterized in that: In order to better achieve core ejection, the following three methods can be adopted; 1. Holding core ejection: A holding core ejection slope (81) with a guiding function is provided on the inner rod (2), a holding part (82) is provided on the outer rod (2), and a holding core ejection boss (821) is further provided on the holding part (82); 2. Holding core ejection: A holding part (82) is provided on the inner rod (2), a holding core ejection boss (821) is further provided on the holding part (82), and a holding core ejection slope (81) with a guiding function is provided on the outer rod (2); 3. Pulling core ejection: A pulling part (83) is provided on the inner rod (1); When holding core ejection, the holding part (82) is deformed by an external force, which can cause the holding core ejection boss (821) to press the holding core ejection slope (81) to achieve core ejection; When pulling core ejection, the pulling part (83) is directly manually moved upward to achieve core ejection.

15. A pen for delaying reset and holding, according to claim 8, characterized in that: The delaying reset member (3) is composed of an elastic substance, shape memory metal, shape memory alloy or an elastic structure, and the displacement reset member (4) is composed of an elastic substance, shape memory metal, shape memory alloy or an elastic structure.

16. A delayed reset holding pen according to any one of claims 1 to 3, characterized in that: The cooperation range of the matching end (11) and the mating end (22) is within the normal pen-holding range of the user during normal writing, specifically within 2 - 90 mm from the writing end of the writing tool body (5).

17. A pen with delayed reset grip according to any one of claims 1 to 3, characterized in that: The head of the inner rod (2) and / or the tail of the outer rod (1) are set as detachable parts (7) for convenient core replacement.

18. A pen for delaying resetting and holding according to any one of claims 1 to 3, characterized in that: A use assistance slope (8) is provided on the inner rod (2) and / or the outer rod (1).

19. A pen with delayed reset grip according to any one of claims 1 to 3, characterized in that: An extended holding rod (12) is provided on the outer rod (1), and the matching end (11) is provided on the extended holding rod (12).

20. A delayed reset holding pen according to claim 19, characterized in that: A holding support boss (23) for accommodating the extended holding rod (12) is further provided on the inner rod (2).

21. A pen with delayed reset and holding function according to claim 14, characterized in that: A ball (84) is further provided between the holding core-out boss (821) and the holding core-out slope (81).

22. A delayed reset holding pen according to any one of claims 1 to 3, characterized in that: A deformation opening (24) is provided on the inner rod (2); a force-receiving protrusion (25) is provided on the upper side of the mating end (22) of the inner rod (2).

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