Gel pen capable of preventing ink leakage

Abstract

The utility model provides a gel pen capable of preventing ink leakage, which belongs to the technical field of gel pens and comprises a penholder, the bottom end of the penholder is in threaded connection with a holding rod, a replaceable refill penetrates through an inner cavity of the penholder, a pen cap is sleeved outside the tip end of the holding rod, and a pen tail end cap is fixedly mounted at the top end of the penholder. An end cap used for blocking the end of the refill is arranged on the inner wall of the pen tail end cap in a sliding mode, a positioning assembly used for fixing the refill is arranged on the inner wall of the end cap in the circumferential direction, and an elastic folding and unfolding assembly used for driving the refill to move is arranged in an inner cavity of the pen tail end cap. The end cap is arranged on the end portion of the pen refill ink containing pipe to prevent ink of the pen refill from leaking out and entering the pen holder, when ink leakage occurs, due to the fact that the end cap is attached to the end portion of the pen refill ink containing pipe in a sealed mode, the ink in the pen refill cannot enter the pen holder, the pen refill can be replaced, and convenience is brought to a user in the using process.

Description

Technical Field

[0001] The utility model relates to the technical field of gel pens, in particular to a gel pen which can prevent ink leakage. Background Art

[0002] Gel pens originated in Japan and are a new type of writing tool that is popular in East Asia. Gel pens can be divided into different types according to the type of pen tip, ink color, structure, etc. You can choose according to your needs. Gel pens have the advantages of both fountain pens and oil-based ballpoint pens. They have a comfortable writing feel, low ink viscosity, and add appropriate lubricants. The viscosity of the writing medium is between water-based and oil-based, so it is smoother than ordinary oil-based ballpoint pens. It is an upgraded product of oil-based ballpoint pens. The ink viscosity of the refill of the gel pen is low, and easy-to-lubricate substances are added. The viscosity of the writing medium is between water-based and oil-based, which will cause gel pen ink leakage.

[0003] A related art (publication number: CN219903863U) discloses a gel pen that prevents ink leakage, and the disclosed technical solution is as follows: a spacer is installed at the top of the pen core tube, the pen tail is detachably connected to the spacer, the spacer is provided with a second through hole, the pen tail is provided with a pen tail groove and a first through hole, the first through hole is connected to the pen tail groove, a ball is installed in the pen tail groove, the ball is detachably connected to the pen tail, a limiting groove is provided at one of the through holes, a limiting block is installed on the limiting groove, and the purpose of automatically giving a reminder as the ink is released; facilitating the installation and disassembly of the pen tail and the pen head; and reducing the probability of ink outflow from the pen core tube.

[0004] In the above disclosed technical solution, it is found that the following problems exist in the related technology: the ink near the port of the neutral pen core is often protected by a float stopper to prevent the ink from leaking. However, during use, once the air tightness is affected, the ink will still leak from the port, and the leaked ink will spread to the entire pen body. Since the ink cleaning process is relatively cumbersome, the entire neutral pen will eventually be discarded. In this regard, we have proposed a new type of neutral pen that prevents ink leakage.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background technology section of this application, and therefore may include prior art information that does not constitute known to ordinary technicians in the field. Utility Model Content

[0006] The utility model aims to solve at least one of the technical problems existing in the prior art or related art. In order to solve the problem of ink leakage prevention of gel pens in the prior art, the utility model provides a gel pen that prevents ink leakage, and adopts a refill port blocking component combined with a refill storage component to prevent the refill from leaking ink out of the pen. The specific technical solution is as follows:

[0007] A gel pen for preventing ink leakage comprises a pen barrel, the bottom end of the pen barrel is threadedly connected with a grip rod, a replaceable pen core is penetrated through the inner cavity of the pen barrel, a pen cap is sleeved on the outside of the pen tip of the grip rod, a tail end cap is fixedly mounted on the top of the pen barrel, an end cap for sealing the end of the pen core is slidably provided on the inner wall of the tail end cap, a positioning component for fixing the pen core is circumferentially provided on the inner wall of the end cap, and an elastic retractable component for driving the pen core to move is provided in the inner cavity of the tail end cap.

[0008] In the above technical solution, the positioning assembly includes a rotating rod rotatably arranged on the inner wall of the end cap, and the top end of the rotating rod is inclined and gathered toward the center in the inner cavity of the end cap, one end of the rotating rod is fixedly installed with a positioning seat, and the other end of the rotating rod is fixedly installed with an extrusion block, and a first elastic member is arranged between the extrusion block and the inner wall of the end cap.

[0009] An elastic ring is embedded and installed at the bottom of the inner wall of the end cap.

[0010] The elastic retractable assembly includes a support seat embedded in the inner wall of the pen tail end cap, a second elastic member is arranged between the support seat and the end cap, one end of a push rod is fixedly mounted on the top of the end cap, and the other end of the push rod passes through the inner cavity of the support seat and extends to the outside of the pen shaft.

[0011] A locking seat is fixedly installed on the top of the pen tail cap, and the locking seat is sleeved on the outside of the push rod. The outer wall of the locking seat is evenly provided with first clamping blocks circumferentially, the outer wall of the grip rod near the tip is evenly provided with second clamping blocks circumferentially, and the inner wall of the pen cap is provided with a clamping groove, and the clamping grooves correspond to the first clamping block and the second clamping block respectively.

[0012] A guide component is arranged between the inner wall of the pen tail end cap and the outer wall of the end cap.

[0013] The guide assembly comprises a guide block which is evenly and fixedly mounted on the inner wall of the pen tail end cap in the circumferential direction; a guide groove is formed on the outer wall of the end cap, and the guide block is slidably arranged on the inner wall of the guide groove.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the gel pen for preventing ink leakage:

[0015] 1. When in use, the pen core is protected by the end cap located at the end of the ink tube of the pen core to prevent the ink of the pen core from leaking out and entering the inside of the pen body.

[0016] Second, when ink leakage occurs, the end cap seals the end of the ink tube of the pen core so that the ink inside the pen core will not enter the inside of the pen barrel, so the pen core can be replaced, which brings convenience to the user.

[0017] 3. When installing the refill, the end of the ink tube of the refill applies force to the extrusion blocks at the top of the five rotating rods at the same time, so that the five circumferential positioning seats all drive the multiple conical blocks on the inner wall to the center distance and clamp on the outer wall of the ink tube of the refill, so that the top of the ink tube of the refill is fitted and fixed on the inner wall of the end cap, ensuring the stability of the position of the refill, thereby ensuring the stability of the gel pen during use.

[0018] 4. When the top of the ink tube of the refill enters the end cap, the elastic ring ensures the stability between the top of the refill and the end cap through the elastic change of the material itself, thereby ensuring the stability of the refill installation.

[0019] 5. When using the gel pen, push the push rod so that the writing end of the pen core passes through the tip of the grip and extends out, then lock the position of the push rod, and then use the gel pen. After use, use the elastic force of the second elastic member to move the push rod, so that the push rod drives the pen core through the end cap and enters the inside of the pen barrel for storage, thereby protecting the pen core.

[0020] 6. When the pen cap is sleeved on the outside of the locking seat, the push rod is pushed to move through the inner wall of the pen cap, and then the push rod is clamped on the outside of the first clamping block through the circumferential clamping groove on the inner wall of the pen cap, thereby locking the pen core. After use, the pen cap is removed from the outside of the locking seat, and the pen core enters the inside of the pen barrel, and then the pen cap is clamped on the outside of the second clamping block through the clamping groove on the inner wall, thereby protecting the pen core. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic structural diagram of a gel pen for preventing ink leakage according to the utility model;

[0022] Figure 2 The utility model is a schematic diagram of the structure of a gel pen that prevents ink leakage. Figure 1 ;

[0023] Figure 3 The utility model is a schematic diagram of the structure of a gel pen that prevents ink leakage. Figure 2 ;

[0024] Figure 4 It is an exploded schematic diagram of the pen tail cap structure of the utility model;

[0025] Figure 5 This is a cross-sectional view of the pen tail cap structure of the utility model;

[0026] Figure 6 for Figure 4 A local enlarged view of point A;

[0027] Figure 7 for Figure 5 A partial enlarged view of point B;

[0028] in, Figures 1 to 7 The correspondence between the figure numbers and the component names is: 1-pen body, 2-pen cap, 3-grip, 4-locking seat, 5-push rod, 6-pen core, 7-pen tail end cap, 8-end cap, 9-support seat, 10-first clamping block, 11-second clamping block, 12-through hole, 13-guide groove, 14-guide block, 15-second elastic member, 17-elastic ring, 18-external thread, 19-internal thread, 20-positioning seat, 21-extrusion block, 22-rotating rod, 23-fixed seat, 24-central axis, 25-first elastic member, 26-rotating seat, 27-connecting rod, 28-conical block. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The following is a combination of specific implementation cases and attached Figure 1-7 The present invention is further described below, but the present invention is not limited to these embodiments.

[0031] A gel pen for preventing ink leakage comprises a pen barrel 1, the bottom end of which is threadedly connected with a grip 3. An internal thread 19 is provided along the inner wall of the bottom end of the inner wall of the pen barrel 1, and an external thread 18 is provided on the outer wall where the grip 3 and the pen barrel 1 are connected, that is, the top end of the grip 3 and the bottom end of the pen barrel 1 are connected through the external thread 18 and the internal thread 19. A replaceable pen core 6 is put into the pen barrel 1 from the bottom end of the pen barrel 1, and then the pen core 6 is placed in the pen barrel 1 through the threaded connection between the grip 3 and the pen barrel 1, thereby completing the replacement of the pen core 6.

[0032] The inner cavity of the pen barrel 1 is provided with a replaceable pen core 6, and the outer side of the pen tip of the grip 3 is provided with a pen cap 2. After the pen core 6 is placed inside the pen barrel 1, the pen cap 2 is put on the outer side of the grip 3. A tail end cap 7 is fixedly installed on the top of the pen barrel 1, and a pen clip is installed on the outer wall of the tail end cap 7, and the tail end cap 7 is fixed to the top of the pen barrel 1. An end cap 8 for sealing the end of the pen core 6 is slidably provided on the inner wall of the tail end cap 7. The top of the ink tube of the pen core 6 is embedded in the top of the inner wall of the end cap 8, and the end cap 8 is used to prevent the ink inside the ink tube of the pen core 6 from spilling out. The inner wall of the end cap 8 is circumferentially provided with a positioning component for fixing the pen core 6, and the inner cavity of the tail end cap 7 is provided with an elastic retractable component for driving the pen core 6 to move.

[0033] After the end of the ink tube of the pen core 6 is placed into the inner wall of the end cap 8, as the pen core 6 moves, the positioning assembly is clamped and fixed on the outer wall of the pen tube of the pen core 6, thereby fixing the pen core 6 and the end cap 8. Then, by moving the elastic retractable assembly, the end cap 8 drives the pen tip of the pen core 6 to move to the outside of the pen tip of the grip 3, and then the pen core 6 is used for writing.

[0034] When in use, the end cap 8 located at the end of the ink tube of the pen core 6 protects the pen core 6 to prevent the ink of the pen core 6 from leaking out and entering the inside of the pen holder 1. When ink leakage occurs, the end cap 8 seals the end of the ink tube of the pen core 6 so that the ink inside the pen core 6 will not enter the inside of the pen holder 1, so the pen core 6 can be replaced. This brings convenience to the user. After the gel pen is used, the pen core 6 is stored in the inside of the pen holder 1 through the elastic retractable assembly, thereby protecting the pen core 6.

[0035] The positioning assembly includes a rotating rod 22 rotatably arranged on the inner wall of the end cap 8, and the top end of the rotating rod 22 is tilted and gathered toward the center and arranged in the inner cavity of the end cap 8. Five fixed seats 23 are evenly fixedly installed on the inner wall of the end cap 8 in the circumferential direction, and bearings are embedded and installed on the inner walls of the inner cavity of the fixed seats 23 on both sides, and the two ends of the central axis 24 are embedded and installed in the two bearings. The central axis 24 rotates inside the fixed seat 23. The rotating seat 26 is fixedly sleeved on the outer surface of the central axis 24 through a mounting hole opened on the surface and penetrating the inner cavity. One end of the connecting rod 27 is fixedly installed on the outer wall of the rotating seat 26, and the other end of the connecting rod 27 is fixedly installed on the outer wall of the rotating rod 22, so that the rotating rod 22 rotates on the inner wall of the end cap 8.

[0036] A positioning seat 20 is fixedly installed at one end of the rotating rod 22. The five positioning seats 20 are all arc-shaped, so that the five positioning seats 20 are arranged circumferentially with the same center as the center. Conical blocks 28 are fixedly installed on the inner walls of the positioning seats 20, and the tips of the conical blocks 28 are all facing the same center. An extrusion block 21 is fixedly installed at the other end of the rotating rod 22. The extrusion block 21 can be a spherical block. The spherical extrusion block 21 reduces the friction force on the contact surface with the pen core 6 through the curvature of the surface, so that the pen core 6 simultaneously squeezes multiple extrusion blocks 21 in the circumferential direction during the movement of the pen core 6 to the top of the inner wall of the end cap 8. A first elastic member 25 is arranged between the extrusion block 21 and the inner wall of the end cap 8. The first elastic member 25 can be a spring. One end of the spring is fixed to the inner wall of the end cap 8, and the other end of the spring is fixed to the outer wall of the extrusion block 21. The spring is V-shaped and arranged between the extrusion block 21 and the inner wall of the end cap 8. The two ends of the first elastic member 25 are arranged with a height difference, so that the first elastic member 25 is arranged tilted.

[0037] The five rotating rods 22 are all inclined, and the bottom ends of the five rotating rods 22 spread out toward the inner wall of the end cap 8. The top ends of the five rotating rods 22 gather toward the center of the end cap 8, so that the five spherical extrusion blocks 21 gather toward the center, and the positions of the rotating rods 22 are statically locked by the first elastic member 25.

[0038] During the movement of the refill 6 toward the inner wall of the end cap 8, the end of the ink tube of the refill 6 simultaneously applies a force to the extrusion blocks 21 at the top of the five rotating rods 22. The extrusion blocks 21 drive the rotating rod 22 to rotate inside the fixed seat 23 along with the rotating seat 26, so that the bottom end of the rotating rod 22 drives the arc-shaped positioning seat 20 to rotate. The five positioning seats 20 in the circumferential direction all drive the multiple conical blocks 28 on the inner wall to move toward the center and clamp on the outer wall of the ink tube of the refill 6. In this way, the top of the ink tube of the refill 6 is fixed to the inner wall of the end cap 8, ensuring the stability of the position of the refill 6, thereby ensuring the stability of the gel pen during use.

[0039] It is worth noting that an elastic ring 17 is embedded and installed at the bottom of the inner wall of the end cap 8. The elastic ring 17 can be made of rubber material, which has the property of elastic deformation. When the top of the ink tube of the pen core 6 enters the inside of the end cap 8, the elastic ring 17 ensures the stability between the top of the pen core 6 and the end cap 8 through the elastic change of the material itself, thereby ensuring the stability of the installation of the pen core 6.

[0040] In addition, the elastic retractable assembly includes a support seat 9 embedded in the inner wall of the pen tail end cap 7. The shape of the support seat 9 corresponds to the shape of the inner wall of the pen tail end cap 7, so that the support seat 9 is fixedly embedded in the inner wall of the pen tail end cap 7. A second elastic member 15 is arranged between the support seat 9 and the end cap 8. The second elastic member 15 can be a compression spring, one end of the second elastic member 15 is fixed to the lower surface of the support seat 9, and the other end of the second elastic member 15 is fixed to the upper surface of the end cap 8. One end of the push rod 5 is fixedly mounted on the top of the end cap 8, and the other end of the push rod 5 passes through the inner cavity of the support seat 9 and extends to the outside of the pen shaft 1. The lower end of the push rod 5 is vertically fixed to the upper surface of the end cap 8, and the other end of the push rod 5 passes through the support seat 9 and extends to the outside of the gel pen.

[0041] When the gel pen is used, the push rod 5 is pushed to drive the end cap 8 to move. The end cap 8 drives the pen core 6 on the inner wall to move inside the pen holder 1, so that the writing end of the pen core 6 passes through the tip of the grip 3 and then extends to the outside, and then the position of the push rod 5 is locked. At this time, the second elastic member 15 is compressed and generates elastic force. After the gel pen is used, the locking member of the push rod 5 is removed, and then the elastic force of the second elastic member 15 is used to drive the push rod 5 to move, so that the push rod 5 drives the pen core 6 through the end cap 8 to enter the inside of the pen holder 1 for storage, thereby protecting the pen core 6.

[0042] In addition, a locking seat 4 is fixedly installed on the top of the pen tail cap 7, and the locking seat 4 is sleeved on the outside of the push rod 5. The locking seat 4 has a through hole 12 that runs through the inner cavity on the surface, so that the locking seat 4 can be movably sleeved on the outside of the push rod 5, and the locking seat 4 is fixed to the top of the pen tail cap 7. The push rod 5 slides in a fit on the inner wall of the through hole 12. When the stability between the pen cap 2 and the locking seat 4 is poor, they are fixed by locking pins or bolts. The outer wall of the locking seat 4 is evenly provided with first clamping blocks 10, and the outer wall of the grip 3 near the tip is evenly provided with second clamping blocks 11. The inner wall of the pen cap 2 is provided with a card slot, and the card slots correspond to the first card block 10 and the second card block 11 respectively.

[0043] When the gel pen is in use, the pen cap 2 is removed from the tip of the grip 3. Then, it is sleeved on the outside of the locking seat 4, and the push rod 5 is pushed to move through the inner wall of the pen cap 2 while being sleeved on the outside of the locking seat 4. As the pen cap 2 is sleeved on the outside of the locking seat 4, the push rod 5 drives the writing end of the pen core 6 to protrude from the tip of the grip 3 to the outside, and then is clamped on the outside of the first clamping block 10 through the circumferential clamping groove on the inner wall of the pen cap 2, thereby locking the pen core 6. After use, the pen cap 2 is removed from the outside of the locking seat 4, and the pen core 6 enters the inside of the pen barrel 1, and then the pen cap 2 is clamped on the outside of the second clamping block 11 through the clamping groove on the inner wall, thereby protecting the pen core 6.

[0044] Furthermore, a guide assembly is provided between the inner wall of the pen end cap 7 and the outer wall of the end cap 8. The guide assembly ensures the stability of the pen core 6 in the process of adjusting the direction.

[0045] The guide assembly includes guide blocks 14 that are evenly fixedly installed on the inner wall of the pen end cap 7 in the circumferential direction, and the outer wall of the end cap 8 is provided with guide grooves 13, and the guide blocks 14 are slidably arranged on the inner wall of the guide grooves 13. A plurality of guide blocks 14 are fixedly installed on the inner wall of the pen end cap 7 in the circumferential direction in sequence, and a plurality of guide grooves 13 are provided on the outer wall of the end cap 8 at positions corresponding to the guide blocks 14. The end cap 8 drives the guide grooves 13 to slide against the outside of the guide blocks 14, and the sliding cooperation between the guide blocks 14 and the guide grooves 13 ensures the stability of the moving direction of the end cap 8. Position deviation is avoided, thereby ensuring the stability of the moving direction of the pen core 6.

[0046] The present embodiment is a gel pen for preventing ink leakage, and its working principle is as follows: when in use, the pen cap 2 is first removed from the tip of the grip 3. Then, it is sleeved on the outside of the locking seat 4, and then the grip 3 is removed from the pen barrel 1. While being sleeved on the outside of the locking seat 4, the push rod 5 is pushed to move through the inner wall of the pen cap 2. As the pen cap 2 is sleeved on the outside of the locking seat 4, the pen cap 2 drives the end cap 8 to move through the push rod 5. Then, the circumferential slot on the inner wall of the pen cap 2 is clamped on the outside of the first clamping block 10 to lock the position of the end cap 8.

[0047] Then the top of the ink tube of the refill 6 is embedded into the inside of the end cap 8. In the process of the refill 6 moving toward the inner wall of the end cap 8, the end of the ink tube of the refill 6 simultaneously applies force to the extrusion blocks 21 at the top of the five rotating rods 22, so that the extrusion blocks 21 drive the rotating rods 22 to rotate inside the fixed seat 23 along with the rotating seat 26. The bottom end of the rotating rod 22 drives the arc-shaped positioning seat 20 to rotate, so that the five positioning seats 20 in the circumferential direction all drive the multiple conical blocks 28 on the inner wall to the center distance and clamp on the outer wall of the ink tube of the refill 6, so that the top of the ink tube of the refill 6 is fixed to the inner wall of the end cap 8. Then the grip 3 is threadedly installed on the pen body 1.

[0048] After use, the pen cap 2 is removed from the outside of the locking seat 4, and the pen core 6 enters the inside of the pen barrel 1 through the elastic force of the second elastic member 15. Then, the pen cap 2 is clamped to the outside of the second clamping block 11 through the clamping groove on the inner wall.

[0049] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0050] In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first", "second", "third" and "fourth" may explicitly or implicitly include at least one of such features.

[0051] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A gel pen for preventing ink leakage, comprising a pen holder (1), the bottom end of the pen holder (1) being threadedly connected to a gripping rod (3), a replaceable pen core (6) being provided through the inner cavity of the pen holder (1), and a pen cap (2) being provided on the outside of the pen tip of the gripping rod (3), characterized in that: A pen tail end cap (7) is fixedly mounted on the top end of the pen shaft (1); an end cap (8) for sealing the end of the pen core (6) is slidably arranged on the inner wall of the pen tail end cap (7); a positioning component for fixing the pen core (6) is circumferentially arranged on the inner wall of the end cap (8); and an elastic retractable component for driving the pen core (6) to move is arranged in the inner cavity of the pen tail end cap (7).

2. A gel pen for preventing ink leakage according to claim 1, characterized in that: The positioning assembly comprises a rotating rod (22) rotatably arranged on the inner wall of the end cap (8), and the top end of the rotating rod (22) is arranged obliquely in the inner cavity of the end cap (8) so as to converge toward the center, a positioning seat (20) is fixedly mounted on one end of the rotating rod (22), and an extrusion block (21) is fixedly mounted on the other end of the rotating rod (22), and a first elastic member (25) is arranged between the extrusion block (21) and the inner wall of the end cap (8).

3. The gel pen for preventing ink leakage according to claim 1, characterized in that: An elastic ring (17) is embedded and installed at the bottom of the inner wall of the end cap (8).

4. The gel pen for preventing ink leakage according to claim 1, characterized in that: The elastic retractable assembly comprises a support seat (9) embedded in the inner wall of the pen tail end cap (7), a second elastic member (15) is arranged between the support seat (9) and the end cap (8), one end of a push rod (5) is fixedly mounted on the top of the end cap (8), and the other end of the push rod (5) passes through the inner cavity of the support seat (9) and extends to the outside of the pen shaft (1).

5. The gel pen for preventing ink leakage according to claim 4, characterized in that: A locking seat (4) is fixedly mounted on the top of the pen tail cap (7), and the locking seat (4) is sleeved on the outside of the push rod (5). The outer wall of the locking seat (4) is evenly provided with first clamping blocks (10) in the circumferential direction, and the outer wall of the gripping rod (3) near the tip is evenly provided with second clamping blocks (11) in the circumferential direction. The inner wall of the pen cap (2) is provided with a clamping groove, and the clamping grooves correspond to the first clamping block (10) and the second clamping block (11) respectively.

6. The gel pen for preventing ink leakage according to claim 1, characterized in that: A guide assembly is provided between the inner wall of the pen tail end cap (7) and the outer wall of the end cap (8).

7. A gel pen for preventing ink leakage according to claim 6, characterized in that: The guide assembly comprises a guide block (14) fixedly mounted on the inner wall of the pen end cap (7) in a circumferentially uniform manner; a guide groove (13) is formed on the outer wall of the end cap (8), and the guide block (14) is slidably arranged on the inner wall of the guide groove (13).

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