Lifting type writing tool

Abstract

A lifting type writing tool structurally comprises a pen holder, a lifting pen sleeve, a pen sleeve insert, a pen holder connecting piece and a first elastic piece. The pen sleeve insert is tightly matched in the lifting pen sleeve, the pen holder connecting piece is detachably connected with the pen holder, and a pen refill is arranged in the pen holder connecting piece. The first elastic piece is arranged outside the penholder connecting piece in a sleeving mode, one end of the first elastic piece abuts against the radial step face of the penholder connecting piece, and the other end of the first elastic piece abuts against the radial step face of the inner wall of the lifting pen sleeve. A sliding groove is formed in the outer wall of the pen holder connecting piece, a sliding block is correspondingly arranged on the inner wall of the pen cap insert, and the sliding block is arranged in the sliding groove in a matched mode and can slide up and down along the sliding groove so that the lifting pen cap can be located at the first position where the pen point is exposed and the second position where the pen point retracts. The pen holder has the advantages that the holding and writing position of the pen holder is round and smooth and cannot hurt the hand, and therefore the holding and writing experience is improved.

Description

Technical Field

[0001] The present application relates to the technical field of writing tools, and in particular to a lifting and pulling type writing tool. Background Art

[0002] The pull-up pen is a writing tool that has appeared in recent years. The pen holder is divided into two parts, the lower part can be pulled up and down relative to the upper part, and the pen core can be extended and retracted by pulling in this way, so that the pen can be switched between a writing state and a non-writing state. However, the currently disclosed prior art requires an uneven groove to be provided on the pen holder at the connection position of the two parts in order to provide space for the lower part to be pulled up and down, and the grip part is located exactly at the position of the groove, which will cause discomfort to the hand and affect the writing experience. In addition, the existing pull-up part has too many internal structural components, which makes assembly difficult. Utility Model Content

[0003] In view of the above-mentioned deficiencies in the prior art, the present application provides a pull-type writing tool with a round and smooth pen holder that does not hurt the hand, thereby improving the grip and writing experience.

[0004] In order to solve the above technical problems, the technical solution adopted in the present application is: a lifting and pulling writing tool, whose structure includes a pen barrel, a lifting pen cover, a pen cover insert, a pen barrel connecting piece, and a first elastic piece; the pen cover insert is tightly fitted in the lifting pen cover, the pen barrel connecting piece is detachably connected to the pen barrel, and a pen core is arranged in the pen barrel connecting piece, and the first elastic piece is sleeved outside the pen barrel connecting piece, and one end thereof abuts against the radial step surface of the pen barrel connecting piece, and the other end abuts against the radial step surface of the inner wall of the lifting pen cover; the outer wall of the pen barrel connecting piece is provided with a slide groove, and the corresponding inner wall of the pen cover insert is provided with a slider, the slider is fitted in the slide groove and can slide up and down along the slide groove, so that the lifting pen cover is in a first position where the pen tip is exposed and a second position where the pen tip is retracted.

[0005] By adopting the above structure, the present application provides a sliding groove on the outer wall of the pen barrel connecting piece, and provides a slider on the pen cap insert that is tightly matched with the lifting pen cap, so as to realize a sliding fitting connection between the lifting pen cap and the pen barrel connecting piece. When it is necessary to extend the pen core for writing, the lifting pen cap is pulled upward, that is, toward the upper end of the pen barrel, and the slider also slides along the sliding groove toward the head of the pen barrel. In this process, the first elastic member is compressed until the pen core is exposed. At this time, the slider and the sliding groove are locked in position. At this time, the lifting pen cap is in the first position and the pen core is extended, so that writing can be carried out; when the pen core needs to be retracted, the lifting pen cap is in the first position. , unlock the locking position of the slider and the slide groove, at this time the compressed first elastic member will release the elastic restoring force, and then push the lifting and pulling pen cover to run in the opposite direction, during this process the slider also slides downward along the slide groove, the pen core is located in the pen shaft connecting member and will not follow the lifting and pulling pen cover to run until the lifting and pulling pen cover covers the pen core and shrinks it to the second position; in the above structure, the lifting and pulling pen cover serves as the gripping part, which is a whole and therefore will not cause hand discomfort, making writing smoother and improving the writing experience; and the structure of the present application has few parts and components, and can also effectively realize the lifting and pulling function, and is easy to operate.

[0006] Furthermore, a sheath is provided between the pen shaft and the lifting pen cover, and the sheath can be extended and retracted up and down as the lifting pen cover is pulled; with this structure, the pen shaft connector can be covered by the setting of the sheath to avoid exposure of the internal structure of the pen, thereby improving the overall performance of the pen.

[0007] Furthermore, a radial boss is provided on the outer wall of the pen shaft connecting piece near the upper end, one end of the sheath is connected to the radial boss, and the other end of the sheath is connected to the upper end surface of the lifting pen cover; with this structure, when the insert and the lifting pen cover slide up and down along the slide groove on the pen shaft connecting piece, since the connection between the pen shaft connecting piece and the pen shaft is fixed, the insert and the lifting pen cover pulled up and down can drive the sheath to lengthen or shrink, thereby covering the pen shaft connecting piece, avoiding exposure of the internal structure of the pen, and improving the overall performance of the pen.

[0008] Furthermore, the slide groove includes a vertical extension portion, and a first locking position is provided at the upper end of the vertical extension portion, and the first locking position extends laterally relative to the vertical extension portion; with this structure, when the slider slides to the upper end of the vertical extension portion, it is slightly deflected into the first locking position, and the slider can be locked in this position. At this time, the position of the pen cover is also positioned, and the pen core is extended, so that writing can be carried out.

[0009] Furthermore, a second locking position is provided at the lower end of the vertical extension portion, and the second locking position extends laterally relative to the vertical extension portion; with this structure, when the slider slides to the lower end of the vertical extension portion, the slider can be slid into the second locking position to lock the position at this time, thereby avoiding slipping and affecting the positioning of the position.

[0010] Furthermore, a protrusion is provided on the second locking position, and a groove is provided on the inner surface of the slider, and the protrusion is used to engage with the groove; with this structure, after the slider enters the second locking position, it can be re-positioned by engaging the groove and the protrusion, thereby improving the stability of this position.

[0011] Furthermore, the first locking position and the second locking position are respectively arranged on the left and right sides of the vertical extension portion; adopting this structure, it is convenient for the slider to enter the second locking position more smoothly, which is more conducive to the operation of the lifting process.

[0012] Furthermore, a transition channel is provided between the first locking position and the second locking position and the vertical extension portion, and a transition arc surface adapted to the transition channel is provided on the slider; with this structure, when the slider enters and exits the first locking position and the second locking position, the operation can be completed more smoothly.

[0013] Furthermore, a limiting boss is provided on the outer wall of the pen shaft connecting piece near the tail end of the slide groove, and the inner diameter of the pen cap insert is smaller than the outer diameter of the limiting boss; with this structure, when the pen cap insert drives the lifting pen cap to slide along the slide groove to the tail end of the slide groove, the pen cap insert and the limiting boss will be abutted and will not continue to slide down, thereby preventing the pen cap insert and the lifting pen cap from detaching from the pen shaft connecting piece.

[0014] Furthermore, two slide grooves are arranged on the outer wall of the pen shaft connecting piece, and the two slide grooves are radially distributed and their extension directions are opposite to each other; correspondingly, two sliding blocks are arranged on the inner wall of the pen cover insert, and the two sliding blocks are respectively adapted to the two slide grooves; with this structure, the two slide grooves can slide and cooperate with the two sliding blocks at the same time, and the operation can be smoother during the pulling process.

[0015] Furthermore, the pen shaft connecting piece is provided with an external thread at the upper end of the radial boss, and the corresponding inner wall of the pen shaft is provided with an internal thread, and the external thread and the internal thread are threadedly connected; with this structure, the pen shaft and the pen shaft connecting piece can be separated and connected, which is convenient for the core changing operation of the lifting pen; and the setting of the limiting boss can also effectively limit the screwing depth of the pen shaft and the pen shaft connecting piece to avoid squeezing the sheath.

[0016] Furthermore, a second elastic member is provided between the front end of the pen core and the inner wall of the pen barrel connecting member. After the pen core is accommodated in the pen barrel and the pen barrel connecting member, its front end abuts against the second elastic member. With this structure, the pen core can write more smoothly during use without shaking or waving.

[0017] Furthermore, a first deflection portion is provided on the outer wall of the pen cap insert, and a second deflection portion adapted thereto is provided on the corresponding inner wall of the lifting pen cap; that is, two planar portions are radially symmetrically provided on the outer wall of the pen cap insert, and then after interference fit with the lifting pen cap, the circumferential rotation of the two can be synchronized without misalignment or slippage between them, and the operation is more convenient when it is necessary to twist open the pen barrel to replace the core. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic structural diagram of the lifting and pulling writing tool of the present application in the writing state (first position).

[0019] Figure 2 A structural schematic diagram of a cross-sectional view of the lift-type writing tool of the present application in the writing state (first position).

[0020] Figure 3 A schematic structural diagram of the lifting and pulling writing tool of the present application in a non-writing state (second position).

[0021] Figure 4 A structural schematic diagram of a cross-sectional view of the lift-type writing tool of the present application in a non-writing state (second position).

[0022] Figure 5 A structural schematic diagram of the assembly diagram of the lift-type writing tool of the present application.

[0023] Figure 6 Schematic diagram of the structure visible inside the lift-type writing tool of the present application in the writing state (first position).

[0024] Figure 7 A schematic diagram of the structure of the lift-type writing tool of the present application in the non-writing state (second position).

[0025] Figure 8 A schematic diagram of the structure of the lift-type writing tool of the present application in the writing state (first position) in which the slide groove is visible.

[0026] Fig. 9 A schematic diagram of the structure of the lift-type writing tool of the present application in the non-writing state (second position) where the slide groove is visible.

[0027] Fig.10 A structural schematic diagram of a cross-sectional view of the pen body and pen body connecting rod of the present application in the writing state (first position).

[0028] Fig.11 A structural schematic diagram of a cross-sectional view of the pen body and pen body connecting rod of the present application in a non-writing state (second position).

[0029] Fig.12 Schematic diagram of the structure of the pen barrel connecting rod of the present application.

[0030] Fig.13 Schematic diagram of the structure of the pen cover insert of the present application.

[0031] Fig.14 Schematic diagram of the structure of the lifting pen cover of the present application.

[0032] As shown in the accompanying drawings: 1. Pen barrel, 2. Pen cap lifting device, 201. Second deflection portion, 3. Pen cap insert, 301. Slider, 302. Groove, 303. Transition arc surface, 304. First deflection portion, 4. Pen barrel connecting piece, 401. Slide groove, 402. Vertical extension portion, 403. First locking position, 404. Second locking position, 405. Protrusion, 406. Transition channel, 407. Radial step, 408. Limiting boss, 5. First elastic member, 6. Pen core, 7. Sheath, 8. Second elastic member. DETAILED DESCRIPTION

[0033] The following will combine the embodiments and drawings to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only preferred embodiments, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention;

[0034] It should also be noted that: when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may be another intermediate component, fixed through the intermediate component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only; the front and rear ends of this application are the front end when the pen tip is extended in the use state, and the rear end where the pressing part is located. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0035] As attached Figure 1-14 As shown, a pull-type writing tool of the present application is provided, and its structure includes a pen holder 1, a pull-up pen cover 2, a pen cover insert 3, a pen holder connecting piece 4 and a first elastic piece 5; the pen cover insert 3 is tightly fitted in the pull-up pen cover 2 (specifically, the two can be interference fit, and the pen cover insert is located at a position near the opening end of the inner wall of the pull-up pen cover), the pen holder connecting piece 4 is detachably connected to the pen holder 1, a pen core 6 is arranged in the pen holder connecting piece 4, the first elastic piece 5 is sleeved outside the pen holder connecting piece 4, and One end thereof abuts against the radial step surface of the pen holder connecting member 4 (the step surface facing radially outward), and the other end abuts against the radial step surface of the inner wall of the lifting pen cover 2 (the step surface extending radially inward); a slide groove 401 is provided on the outer wall of the pen holder connecting member 4, and a slider 301 is provided on the inner wall of the corresponding pen cover insert 3. The slider 301 fits in the slide groove 401 and can slide up and down along the slide groove 401, so that the lifting pen cover 2 is in the first position where the pen tip is exposed (for details, refer to the attached Figure 1-2 , i.e. the writing state with the pen tip extended, at which time the pen cover is pulled up along the slide slot and rises relative to the pen shaft connector to its lower end to expose the pen tip) and the second position in which the pen tip is retracted (for details, refer to the attached Figure 3-4 , that is, the non-writing state with the pen tip retracted, at this time the pen cover is lifted and runs downward along the slide groove, and drops to the lower end relative to the pen shaft connecting piece to cover the pen tip); the lifting pen cover of the present application is a gripping part, which can be a pen cover structure with a smooth and flat outer wall as a whole, which makes the contact smoother and less painful to the hand, thereby improving the writing comfort and writing experience.

[0036] By adopting the above structure, the present application provides a sliding groove on the outer wall of the pen barrel connecting piece, and provides a slider on the pen cap insert that is tightly matched with the lifting pen cap, so as to realize a sliding fitting connection between the lifting pen cap and the pen barrel connecting piece. When it is necessary to extend the pen core for writing, the lifting pen cap is pulled upward, that is, toward the upper end of the pen barrel, and the slider also slides along the sliding groove toward the head of the pen barrel. In this process, the first elastic member is compressed until the pen core is exposed. At this time, the slider and the sliding groove are locked in position. At this time, the lifting pen cap is in the first position and the pen core is extended, so that writing can be carried out; when the pen core needs to be retracted, the lifting pen cap is in the first position. , unlock the locking position of the slider and the slide groove, at this time the compressed first elastic member will release the elastic restoring force, and then push the lifting and pulling pen cover to run in the opposite direction, during this process the slider also slides downward along the slide groove, the pen core is located in the pen shaft connecting member and will not follow the lifting and pulling pen cover to run until the lifting and pulling pen cover covers the pen core and shrinks it to the second position; in the above structure, the lifting and pulling pen cover serves as the gripping part, which is a whole and therefore will not cause hand discomfort, making writing smoother and improving the writing experience; and the structure of the present application has few parts and components, and can also effectively realize the lifting and pulling function, and is easy to operate.

[0037] As attached Figure 1-7As shown, a sheath 7 is further provided between the pen body 1 and the lifting pen cover 2 described in the present application, and the sheath 7 can be extended and retracted up and down as the lifting of the lifting pen cover 2 is performed; with this structure, the pen body connector can be covered by the setting of the sheath to avoid exposure of the internal structure of the pen and improve the overall performance of the pen.

[0038] As attached Figure 1-5 As shown in , 12, a radial boss 407 is provided on the outer wall of the upper end of the pen shaft connector 4 described in the present application, one end of the sheath 7 is connected to the radial boss 407, and the other end of the sheath 7 is connected to the upper end face of the lifting pen cover 2; that is, one side of the two axial end faces of the sheath structure is connected to the end face of the radial boss, and the other side is connected to the end face of the lifting pen cover; when the insert and the lifting pen cover slide up and down along the slide groove on the pen shaft connector, since the connection between the pen shaft connector and the pen shaft is fixed, the end face of the sheath connected to the radial boss is fixed, and the lower end of the sheath is stretched or contracted along with the pen cover insert and the lifting pen cover, thereby covering the pen shaft connector to avoid exposure of the internal structure of the pen. , improving the overall performance of the pen; and the upper end of the sheath is not connected to the pen holder, nor does it affect the disassembly and core replacement action between the pen holder and the pen holder connector; specifically, the sheath 7 described in the present application can be a flexible bellows with a certain elasticity, and the end face of the sheath is connected to the component at the corresponding end, which can be achieved by bonding, welding or other connecting methods; with this structure, if the user's hand comes into contact with the flexible bellows, it can avoid hurting the hand, and the pen cover will not be subjected to excessive resistance during the up and down pulling process of following the lifting of the pen cover; the flexible bellows of the present application can have a certain elastic deformation force, similar to a spring, so that it is convenient to cover the section between the pen holder and the lifting pen cover by the elongation during compression and recovery.

[0039] As attached Figure 5-6 , 8-9 and 12, the slide groove 401 described in the present application includes a vertical extension portion 402, and the upper end of the vertical extension portion 402 is provided with a first locking position 403, and the first locking position 403 extends laterally relative to the vertical extension portion 402, that is, the first locking position is also a groove structure connected to the vertical extension portion, offset to one side of the vertical extension portion, and can accommodate the protrusion on the pen cover insert, so that the protrusion is fixed at this position, and the first position is locked; with this structure, when the slider slides to the upper end of the vertical extension portion, it can be slightly deflected to enter the first locking position, and the slider can be locked at this position. At this time, the position of lifting the pen cover is also positioned, and the pen core is extended, and writing can be done.

[0040] As attached Figure 5-6, 8-9 and 12, the lower end of the vertical extension portion 402 described in the present application is provided with a second locking position 404, and the second locking position 404 extends laterally relative to the vertical extension portion 402; that is, the second locking position is also a groove structure connected to the vertical extension portion, offset to one side of the vertical extension portion, and can accommodate the protrusion on the pen cover insert, so that the protrusion is fixed at this position, thereby realizing the locking of the second position; with this structure, when the slider slides to the lower end of the vertical extension portion, the slider can be slid into the second locking position, thereby realizing the locking of the position at this time, and avoiding the position slipping and affecting the positioning of the position.

[0041] As attached Figure 5-6 , 8-9 and 12, the second locking position 404 described in the present application is provided with a protrusion 405, and the inner surface of the slider 301 is provided with a groove 302, and the protrusion 405 is used to engage with the groove 302; with this structure, after the slider enters the second locking position, it can be re-positioned by the engagement of the groove and the protrusion, that is, after the slider is laterally offset to enter the second locking position, it passes over the protrusion under the action of the deflection force until the slide groove and the protrusion are aligned and engaged, so that the positioning of this position can be achieved, so that the slider is positioned both axially and laterally, thereby improving the stability of this position.

[0042] As attached Figure 5-6 , 8-9 and 12, the first locking position 403 and the second locking position 404 described in the present application are respectively arranged on the left and right sides of the vertical extension part 402; that is, the two locking positions are not on the same side but are respectively arranged on the left and right sides in the length direction of the vertical extension part. With this structure, it is convenient for the slider to enter the second locking position more smoothly, which is more conducive to the operation of the lifting process.

[0043] As attached Figure 5-6 As shown in 8-9 and 12, a transition channel 406 is provided between the first locking position 403 and the second locking position 404 described in the present application and the vertical extension portion 402, and a transition arc surface 303 adapted to the transition channel 406 is provided on the slider 301; that is, the slider has an inclined arc end face, and a slideway adapted thereto is provided on the slide groove, and when the slider enters and exits the first locking position and the second locking position, the slider can complete the operation more smoothly and enter different locking positions through the cooperation and guidance of the arc surface and the slideway.

[0044] As attached Figure 2 , 4As shown in 6-7 and 12, a limiting boss 408 is provided on the outer wall of the pen barrel connector 4 near the tail end of the slide groove 401 described in the present application, and the inner diameter of the pen cap insert 3 is smaller than the outer diameter of the limiting boss; the pen cap insert and the lifting pen cap can slide in from the lower end of the slide groove, i.e., the tail end near the pen tip, from the notch position at the tail end of the slide groove. When touching the limiting boss, a little force is applied. The pen cap insert can be a plastic part with elastic restoring force that can undergo a certain deformation. It will pass over the limiting boss and enter the outer wall of the pen barrel connector to slide and connect; without external force, the pen cap insert will be blocked and limited by the limiting boss when it recovers; with this structure, when the pen cap insert drives the lifting pen cap to slide along the slide groove to the tail end of the slide groove, the pen cap insert and the limiting boss will be abutted and will not continue to slide down, thereby preventing the pen cap insert and the lifting pen cap from being separated from the pen barrel connector.

[0045] As an example, two slide grooves 401 are arranged on the outer wall of the pen shaft connector 4 described in the present application, and the two slide grooves 401 are radially distributed and their extension directions are opposite to each other; correspondingly, two sliders 301 are arranged on the inner wall of the pen cap insert 3, and the two sliders 301 are respectively adapted to the two slide grooves 401; that is, one slide groove is arranged symmetrically along the radial direction on the outer wall of the pen shaft connector, but the extension directions of the two slide grooves are opposite, and the two slide grooves can slide with the two sliders at the same time, so that the operation is smoother during the pulling process.

[0046] As attached Figure 2 , 4 As shown in , 5 and 12, the pen shaft connector 4 described in the present application is provided with an external thread at the upper end of the radial boss 407, and the corresponding inner wall of the pen shaft 1 is provided with an internal thread, and the external thread and the internal thread are threadedly connected; with this structure, the pen shaft and the pen shaft connector can be separated and connected, which is convenient for the core replacement operation of the lifting pen; and the setting of the limiting boss can also effectively limit the screwing depth of the pen shaft and the pen shaft connector to avoid squeezing the sheath.

[0047] As attached Figure 2 , 4 As shown in Figures 5 and 6, a second elastic member 8 is further provided between the front end (the end close to the pen tip) of the pen core 6 described in the present application and the inner wall of the pen shaft connector 4. After the pen core 6 is accommodated in the pen shaft 1 and the pen shaft connector 4, its front end (the front end of the pen core has a radial step surface) abuts against the second elastic member 8; that is, the second elastic member abuts between the radial step surface at the front end of the pen shaft connector and the radial step surface at the front end of the pen core. With this structure, the pen core can write more smoothly during use without shaking or swaying.

[0048] As attached Figure 13-14As shown, a first deflecting portion 304 is provided on the outer wall of the pen cap insert 3 described in the present application, and a second deflecting portion 201 adapted thereto is provided on the corresponding inner wall of the lifting pen cap 2; that is, two plane portions are radially symmetrically provided on the outer wall of the pen cap insert (that is, a part of the circular outer wall of the pen cap insert is axially cut off to form a plane), and then after interference fit with the lifting pen cap, the circumferential rotation of the two can be synchronized, and there will be no misalignment or slippage between them, and when it is necessary to twist open the pen shaft to change the core, the operation is more convenient.

[0049] The specific working principle and action process of the lift-and-pull writing tool of the present application are as follows: first, the pen cover insert and the lift-and-pull pen cover are interference-fitted to achieve a fixed connection between the two, the pen core and the second elastic member are inserted into the pen barrel connecting member, the first elastic member is sleeved on the outside of the pen barrel connecting member, the pen cover insert and the lift-and-pull pen cover are matched with the slide groove, the sleeve is sleeved on the outside of the pen barrel connecting member, and then the pen barrel connecting member is screwed onto the pen barrel as a whole, and the pressing part inside the pen barrel presses the pen core into the pen barrel connecting member and the pen tip extends out of the front end of the pen barrel connecting member, thereby realizing the assembly of the lift-and-pull writing tool of the present application; by lifting the lift-and-pull pen cover, the slider in the pen cover insert slides relative to the slide groove on the pen barrel connecting rod, and the lift-and-pull pen cover is lifted to a certain height and then passed through The pen holder is in the first position, which is the writing state, and the pen is in the second position, which is the writing state. When the pen holder is not in the writing state, the pen holder can be locked in the second position by the lifting and pulling method.

Claims

1. A lifting writing tool, characterized in that: The structure of the writing tool comprises a pen holder (1), a lifting pen cover (2), a pen cover insert (3), a pen holder connecting piece (4) and a first elastic piece (5); the pen cover insert (3) is tightly fitted in the lifting pen cover (2); the pen holder connecting piece (4) and the pen holder (1) are detachably connected; a pen core (6) is arranged in the pen holder connecting piece (4); the first elastic piece (5) is sleeved outside the pen holder connecting piece (4), and one end of the first elastic piece (5) is connected to the pen holder connecting piece (4). The outer wall of the pen shaft connecting member (4) is provided with a slide groove (401), and the corresponding inner wall of the pen cover insert (3) is provided with a slider (301). The slider (301) fits in the slide groove (401) and can slide up and down along the slide groove (401) so that the lifting pen cover (2) is in a first position where the pen tip is exposed and a second position where the pen tip is retracted.

2. The pull-type writing tool according to claim 1, characterized in that: A protective sheath (7) is further provided between the pen holder (1) and the lifting pen cover (2), and the protective sheath (7) can be extended and retracted up and down as the lifting pen cover (2) is pulled.

3. The pull-type writing tool according to claim 2, characterized in that: A radial boss (407) is arranged on the outer wall of the pen shaft connecting piece near the upper end, one end of the sheath (7) is connected to the radial boss (407), and the other end of the sheath (7) is connected to the upper end surface of the lifting pen cover (2).

4. The pull-type writing tool according to claim 1, characterized in that: The slide groove (401) comprises a vertical extension portion (402), the upper end of the vertical extension portion (402) is provided with a first locking position (403), and the first locking position (403) extends transversely relative to the vertical extension portion (402).

5. The pull-type writing tool according to claim 4, characterized in that: A second locking position (404) is provided at the lower end of the vertically extending portion (402), and the second locking position (404) extends transversely relative to the vertically extending portion (402).

6. The pull-type writing tool according to claim 5, characterized in that: The second locking position (404) is provided with a protrusion (405), the inner surface of the sliding block (301) is provided with a groove (302), and the protrusion (405) is used to engage with the groove (302).

7. The pull-type writing tool according to claim 5, characterized in that: The first locking position (403) and the second locking position (404) are respectively arranged on the left and right sides of the vertical extension portion (402).

8. The pull-type writing tool according to claim 5, characterized in that: A transition channel (406) is provided between the first locking position (403) and the second locking position (404) and the vertical extension portion (402), and a transition arc surface (303) adapted to the transition channel is provided on the slider (301).

9. The pull-type writing tool according to claim 1, characterized in that: A limiting boss (408) is provided on the outer wall of the pen shaft connecting piece (4) close to the tail end of the slide groove (401), and the inner diameter of the pen cover insert (3) is smaller than the outer diameter of the limiting boss (408).

10. The pull-type writing tool according to claim 1, characterized in that: Two slide grooves (401) are arranged on the outer wall of the pen shaft connecting piece (4), and the two slide grooves (401) are radially distributed and their extension directions are opposite to each other; correspondingly, two sliding blocks (301) are arranged on the inner wall of the pen cover insert (3), and the two sliding blocks (301) are respectively adapted to the two slide grooves (401).

11. The pull-type writing tool according to claim 3, characterized in that: The pen holder connecting piece (4) is provided with an external thread at the upper end of the radial boss (407), and the inner wall of the corresponding pen holder (1) is provided with an internal thread, and the external thread and the internal thread are threadedly connected.

12. The pull-type writing tool according to claim 1, characterized in that: A second elastic member (8) is also provided between the front end of the pen core (6) and the inner wall of the pen shaft connecting member (4). After the pen core (6) is accommodated in the pen shaft (1) and the pen shaft connecting member (4), its front end abuts against the second elastic member (8).

13. The pull-type writing tool according to claim 1, characterized in that: A first deflecting portion (304) is arranged on the outer wall of the pen cap insert (3), and a second deflecting portion (201) adapted thereto is correspondingly arranged on the inner wall of the lifting pen cap (2).

Images