Sealing assembly and writing tool

Abstract

A sealing assembly comprises a fixed seat, a movable part axially and movably arranged in the fixed seat and a sealing part rotationally arranged at one end of the fixed seat, and the movable part is connected with the sealing part and used for driving the sealing part to rotate forwards to open a pen point or rotate reversely to close the pen point when the movable part moves in the axial direction along with a pen refill. The sealing part is further provided with an aligning stop block which can abut against the fixing base and is used for limiting the closing position of the sealing part. According to the sealing assembly, the pen point is not prone to being damaged, and ink mark pollution is not prone to being caused. In addition, the utility model also provides a writing tool which is not easy to damage the pen point and is not easy to cause ink mark pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of office stationery, in particular to a sealing component and a writing tool. Background Art

[0002] In order to prevent the ink on the nib from drying out over time, existing writing instruments usually have a pen cap on the nib to seal the nib when not in use. However, the pen cap of such a pull-out writing instrument is often lost during use.

[0003] In order to solve the problem that the cap of existing uncapped writing tools is easy to lose, a push-type writing tool with a pen tip sealing structure has emerged. For example, the Chinese utility model patent with authorization publication number CN 211684319 U discloses a marker pen with a pen tip sealing structure, and its structure is as follows: Figure 1 As shown, the marker pen comprises a barrel 1a and a refill 2a. A push-on element 3a is located at the top of the refill 2a, and a nib 4a is located at the bottom. A sealing assembly 5a is located outside the nib 4a. The sealing assembly 5a comprises a valve sleeve 6a, a spring 7a, a valve seat 8a, and a sealing valve. The sealing valve comprises a sealing valve body 9a and a sealing cap 10a, which is movably connected to the sealing valve body 9a. When writing with this marker pen with a nib sealing structure, the push-on element 3a is pressed, and the nib 4a pushes the sealing cap 10a to rotate open and extend out of the barrel 1a. After writing, the push-on element 3a is pressed again, and the nib 4a retracts into the barrel 1a. Simultaneously, the sealing cap 10a is squeezed and re-seals the sealing valve body 9a. This seals the nib 4a within the sealing valve body 9a, preventing ink from drying up in the nib 4a.

[0004] However, existing writing tools have the following technical problems: the sealing component 5a needs to be directly pushed by the pen tip 4a to open, which will cause certain damage to the pen tip 4a. At the same time, the pen tip 4a scratching the sealing component 5a will also cause ink contamination. Utility Model Content

[0005] The technical problem to be solved by the present invention is to overcome the defects of the existing technology and propose a sealing component that is not easy to damage the pen tip and is not easy to cause ink pollution; it also proposes a writing tool that is not easy to damage the pen tip and is not easy to cause ink pollution.

[0006] Compared with the existing technology, the present invention proposes a sealing assembly, including a fixed seat, a movable part axially movably arranged in the fixed seat, and a sealing part rotatably arranged at one end of the fixed seat. The movable part is connected to the sealing part and is used to drive the sealing part to rotate forward to open the pen tip or rotate backward to close the pen tip when the movable part follows the axial movement of the pen core. The sealing part is also provided with a return block that can be abutted against the fixed seat to limit the closed position of the sealing part.

[0007] After adopting the above structure, compared with the prior art, the present invention has the following advantages: the opening and closing of the sealing assembly of the present invention is driven by a movable part rather than directly by the pen tip, and the pen tip and the sealing assembly are never in contact, so it is not easy to cause damage to the pen tip or ink contamination; in addition, a return block is provided on the sealing part to abut against the fixed seat, which can prevent poor sealing caused by excessive rotation of the sealing part.

[0008] Preferably, both sides of the sealing portion are rotatably connected in the fixed seat, and both sides of the movable member are movably connected in the sealing portion. This arrangement is reasonable and easy to connect the sealing portion with the fixed seat and the movable member.

[0009] Preferably, two lugs are symmetrically provided at one end of the fixing base connected to the sealing portion, and the two sides of the sealing portion are rotatably connected to the inner sides of the two lugs. This arrangement not only facilitates the use of the lugs to connect the sealing portion to the fixing base, but also facilitates the use of the vacant space on both sides of the lugs to realize the rotation of the sealing portion.

[0010] Preferably, two return stops are provided and located outside the sealing portion, and when the sealing portion rotates to the closed position, the two return stops respectively abut against the two lugs. This arrangement facilitates limiting the closed position of the sealing portion and is very reliable.

[0011] Preferably, the movable member is provided with a push rod, and the sealing portion is provided with a push groove. When the movable member slides axially within the fixed seat, the push rod simultaneously slides axially within the push groove and rotates radially to drive the sealing portion to rotate. When the sealing portion needs to be opened, the push rod enters the push groove, gradually pushing the sealing portion to rotate and avoid blocking the pen tip, allowing the pen tip to extend. When retracting, the retracting force of the push rod pulls the push groove, causing the sealing portion to rotate in the opposite direction and reset, thereby re-sealing the pen tip. The cooperating structure of the push rod and the push groove is simple and can reliably achieve opening and closing of the sealing portion.

[0012] Preferably, the push groove is arc-shaped, with one end of the push groove being open and the other end extending inwards. This arrangement makes the push rod and the push groove cooperate more smoothly.

[0013] Preferably, two push rods are provided, symmetrically arranged on either side of the outer side of the movable member. The number and position of the push grooves match the number of push rods, and the axis connecting the two push rods is parallel to the rotation axis of the sealing portion. This arrangement optimizes the interaction between the components, ensuring more uniform force on the sealing portion and smoother and more reliable rotation.

[0014] Preferably, the pen further includes a first sealing ring for installation between the pen barrel and the refill, the first sealing ring being located on the end of the fixing base away from the sealing portion. This arrangement completely seals the refill's tip within the enclosed space formed by the first sealing ring and the sealing portion, providing a better sealing effect and preventing ink from drying out.

[0015] Preferably, a first elastic reset member is provided between the first sealing ring and the movable member for applying a force to the movable member in the direction of the pen tip. This arrangement is more conducive to the movable member following the axial movement of the pen core, thereby ensuring reliable opening and closing of the sealing portion.

[0016] Compared with the prior art, the present invention proposes a writing tool comprising a pen shaft and a pen core, wherein a pressing portion is provided at one end of the pen core and a pen tip is provided at the other end, and the above-mentioned sealing assembly is provided inside the pen shaft and on the outside of the pen tip, and the movable part of the sealing assembly can follow the axial movement of the pen core.

[0017] After adopting the above structure, compared with the prior art, the present invention has the following advantages: the opening and closing of the writing tool of the present invention is driven by the movable parts rather than directly by the pen tip, and the pen tip and the sealing assembly are never in contact, so it is not easy to cause damage to the pen tip or ink contamination; in addition, a return block is provided on the sealing part to abut against the fixed seat, which can prevent poor sealing caused by excessive rotation of the sealing part. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of an existing marker pen with a pen tip sealing structure;

[0019] Figure 2 Schematic diagram of the structure of the sealing assembly in Example 1;

[0020] Figure 3 This is an exploded schematic diagram of the sealing assembly in Example 1;

[0021] Figure 4 Schematic diagram of the structure of the writing tool in Example 2;

[0022] Figure 5 This is an exploded schematic diagram of the writing tool in Example 2;

[0023] Figure 6 is an axial cross-sectional view of the writing instrument in Example 2;

[0024] In the prior art figure: 1a-pen body, 2a-pen core, 3a-press core, 4a-pen tip, 5a-sealing assembly, 6a-valve sleeve, 7a-spring, 8a-valve seat, 9a-sealing valve body, 10a-sealing cover;

[0025] In the figure of the utility model: 1-fixed seat, 2-movable part, 3-sealing part, 4-pen core, 5-pen tip, 6-return block, 7-lug, 8-pushing rod, 9-pushing groove, 10-opening, 11-pressing part, 12-first sealing ring, 13-first elastic reset member, 14-axis hole, 15-rotating shaft, 16-guide groove, 17-guide block, 18-core hole, 19-second sealing ring, 20-first radial step surface, 21-second elastic reset member, 22-second radial step surface, 23-third radial step surface, 24-fourth radial step surface, 25-support member, 26-pen holder. DETAILED DESCRIPTION

[0026] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0027] Example 1:

[0028] like Figure 2 、 Figure 3 As shown, combined with Figure 4-6 The present embodiment provides a sealing assembly, comprising a fixed seat 1, a movable part 2 axially movably arranged in the fixed seat 1, and a sealing portion 3 rotatably arranged at one end of the fixed seat 1. The movable part 2 is connected to the sealing portion 3 and is used to drive the sealing portion 3 to rotate forward to open the pen tip 5 or rotate backward to close the pen tip 5 when the movable part 2 follows the axial movement of the pen core 4. The sealing portion 3 is also provided with a return block 6 that can be abutted against the fixed seat 1 to limit the closed position of the sealing portion 3. In the present embodiment, the sealing portion 3 is roughly spherical.

[0029] The opening and closing of the sealing assembly of this embodiment is driven by the movable part 2 rather than directly by the pen tip 5. The pen tip 5 and the sealing assembly are never in contact, so it is not easy to cause damage to the pen tip 5 or cause ink contamination. In addition, a return block 6 is provided on the sealing part 3 to abut against the fixed seat 1 to prevent poor sealing caused by excessive rotation of the sealing part 3.

[0030] The two sides of the sealing part 3 are rotatably connected in the fixed seat 1, and the two sides of the movable part 2 are movably connected in the sealing part 3. This arrangement is reasonable and easy to connect the sealing part 3 with the fixed seat 1 and the movable part 2.

[0031] Two lugs 7 are symmetrically disposed on one end of the fixing base 1 connected to the sealing portion 3. The two sides of the sealing portion 3 are rotatably connected to the inner sides of the two lugs 7. In this embodiment, the rotatable connection between the sealing portion 3 and the lugs 7 is achieved by providing axial holes 14 in the two lugs 7 and rotating shafts 15 on either side of the sealing portion 3. The axis connecting the two rotating shafts 15 serves as the rotation axis. This arrangement facilitates the use of the lugs 7 to connect the sealing portion 3 to the fixing base 1, while also utilizing the vacant space on either side of the lugs 7 to achieve rotation of the sealing portion 3.

[0032] Two return blocks 6 are provided and are located outside the sealing portion 3. When the sealing portion 3 rotates to the closed position, the two return blocks 6 respectively abut against the two lugs 7. This arrangement makes it easy to limit the closed position of the sealing portion 3, and the limit is very reliable.

[0033] The movable member 2 is provided with a push rod 8, and the sealing portion 3 is provided with a push groove 9. When the movable member 2 slides axially within the fixed seat 1, the push rod 8 simultaneously slides axially within the push groove 9 and rotates radially to drive the sealing portion 3 to rotate. When the sealing portion 3 needs to be opened, the push rod 8 enters the push groove 9, gradually pushing the sealing portion 3 to rotate and avoid blocking the pen tip 5, allowing the pen tip 5 to extend. When retracting, the retracting force of the push rod 8 pulls the push groove 9, causing the sealing portion 3 to rotate in the opposite direction and reset, thus re-sealing the pen tip 5. The cooperating structure of the push rod 8 and the push groove 9 is simple and can reliably achieve the opening and closing of the sealing portion 3.

[0034] The push groove 9 is arc-shaped, with one end of the push groove 9 being an opening 10 and the other end extending inwardly. This arrangement makes the cooperation between the push rod 8 and the push groove 9 smoother.

[0035] Two push rods 8 are symmetrically arranged on both sides of the outer side of the movable part 2. The number and position of the push grooves 9 match the push rods 8. The axis connecting the two push rods 8 is parallel to the rotation axis of the sealing part 3. This arrangement optimizes the interaction between the components, making the force on the sealing part 3 more uniform and the rotation more stable and reliable.

[0036] The pen holder 26 and the refill 4 are provided with a first sealing ring 12, which is located at the end of the fixing base 1 away from the sealing portion 3. This arrangement completely seals the tip 5 of the refill 4 within the enclosed space formed by the first sealing ring 12 and the sealing portion 3, providing a better sealing effect and preventing the ink from drying out.

[0037] A first elastic return member 13 is provided between the first sealing ring 12 and the movable member 2 to apply a force to the movable member 2 toward the pen tip. In this embodiment, the first elastic return member 13 is a compression spring, and the first elastic return member 13 abuts between the first sealing ring 12 and a first radial step surface 20 on the outer side of the movable member 2. This arrangement facilitates the movable member 2 to follow the axial movement of the pen refill 4, thereby ensuring reliable opening and closing of the sealing portion 3.

[0038] An axial guide structure is provided between the movable part 2 and the fixed seat 1. In this embodiment, the axial guide structure includes a guide groove 16 axially arranged on the inner side of the fixed seat 1, and a guide block 17 arranged on the outer side of the movable part 2. Two guide grooves 16 are provided and symmetrically arranged on both sides of the fixed seat 1. The number and position of the guide blocks 17 match the guide grooves 16.

[0039] Example 2:

[0040] like Figure 4-6 As shown, combined with Figure 2 、 Figure 3 The present embodiment provides a writing tool, which is a marker pen, including a pen barrel 26 and a pen core 4. The pen core 4 is arranged in the pen barrel 26, and a pressing portion 11 is provided at one end of the pen core 4 and a pen tip 5 is provided at the other end. The pressing portion 11 is exposed outside the pen tail of the pen barrel 26. A core hole 18 is provided at the pen tip of the pen barrel 26 for allowing the pen tip 5 to pass through. The sealing assembly in Example 1 is provided in the pen barrel 26 and outside the pen tip 5. The movable part 2 of the sealing assembly can move axially with the pen core 4. The axial movement includes axial forward movement and axial backward movement. The axial forward movement refers to movement toward the pen tip, and the axial backward movement refers to movement toward the pen tail. When the movable part 2 moves axially forward with the pen core 4, the sealing part 3 is driven to rotate forward to open the pen tip 5, so that the pen tip 5 can pass through the core hole 18 at the pen tip. When the movable part 2 moves axially backward with the pen core 4, the sealing part 3 is driven to rotate in the opposite direction to close the pen tip 5, so that the core hole 18 at the pen tip can be blocked by the sealing part 3 to seal the pen tip 5.

[0041] The opening and closing of the writing instrument in this embodiment is driven by the movable part 2 rather than directly by the pen tip 5. The pen tip 5 and the sealing component are never in contact, so it is not easy to cause damage to the pen tip 5 or cause ink contamination. In addition, a return block 6 is provided on the sealing part 3 to abut against the fixed seat 1, which can prevent poor sealing caused by excessive rotation of the sealing part 3.

[0042] A second sealing ring 19 is further provided between the sealing portion 3 and the core hole 18 of the pen holder 26. When the sealing portion 3 seals the core hole 18, it abuts against the second sealing ring 19. This arrangement creates a tighter seal at the core hole 18, preventing the pen tip 5 from coming into contact with the outside world and causing the ink inside to dry out.

[0043] A second elastic return member 21 is sleeved on the outside of the refill 4 to apply a force toward the end of the pen. In this embodiment, the second elastic return member 21 is a compression spring, which abuts between the first sealing ring 12 and a second radial step surface 22 on the outside of the refill 4. This arrangement allows the refill 4 and movable member 2 to automatically retract using the second elastic return member 21, and provides a better feel when pressed.

[0044] A support member 25 is further provided between the first sealing ring 12 and the fixing base 1, and the end of the first elastic return member 13 closest to the first sealing ring 12 abuts against the support member 25. This arrangement prevents both ends of the first sealing ring 12 from being abutted by the elastic return member, thereby preventing the first sealing ring 12 from deforming and affecting the sealing effect.

[0045] The refill 4 and the movable member 2 can interfere with each other in the radial direction so that the movable member 2 can follow the axial movement of the refill 4. In this embodiment, a third radial step surface 23 is provided on the outer side of the refill 4, and a fourth radial step surface 24 is provided on the inner side of the movable member 2. The third radial step surface 23 is provided in front of the fourth radial step surface 24 and the two can abut against each other. This arrangement utilizes a simple radial interference structure to enable the movable part 2 to follow the pen core 4 in axial forward and axial backward movement; when the pressing portion 11 is pressed to make the pen core 4 move axially forward, the third radial step surface 23 moves axially forward, so that the movable part 2 will also move axially forward under the action of the first elastic return member 13, thereby achieving the movable part 2 following the pen core 4 in axial forward movement; after pressing the pressing portion 11 again and releasing it, the pen core 4 moves axially backward under the action of the restoring force of the second elastic return member 21, and since the third radial step surface 23 of the pen core 4 abuts against the front of the fourth radial step surface 24 of the movable part 2, the pen core 4 can pull the movable part 2 to move axially backward, that is, the movable part 2 follows the pen core 4 in axial backward movement.

[0046] The elastic restoring force of the second elastic restoring member 21 is greater than the elastic restoring force of the first elastic restoring member 13. This arrangement allows the larger elastic restoring force of the second elastic restoring member 21 to overcome the effect of the first elastic restoring member 13 when the refill 4 moves axially backward, allowing the refill 4 to reliably drive the movable member 2 to move axially backward.

[0047] The installation process of the writing tool in this embodiment is as follows:

[0048] (1) Put the second elastic reset member 21 on the outside of the pen core 4;

[0049] (2) Install the first sealing ring 12, the support member 25 and the first elastic reset member 13 on the outside of the pen core 4 in sequence;

[0050] (3) The fixing seat 1 is placed on the outside of the first elastic reset member 13 with one end thereof resting against the support member 25;

[0051] (4) The movable member 2 is installed in the fixed seat 1 and axially slidably connected to the guide groove 16 through the guide block 17. At this time, the first elastic return member 13 is located between the support member 25 and the first radial step surface 20 of the movable member 2;

[0052] (5) After aligning the opening 10 of the push groove 9 of the sealing part 3 with the push rod 8 of the movable part 2, the rotating shafts 15 on both sides of the sealing part 3 are inserted into the shaft holes 14 on both sides of the fixing seat 1 to complete the installation of the sealing part 3;

[0053] (6) Install the second sealing ring 19 into the pen head of the pen body 26, and then install the components assembled in step (5) into the interior of the pen body 26. The first sealing ring 12 is fixed and sealed between the inner wall of the pen body 26 and the outer wall of the pen core 4, and the fixing seat 1 can be fixed on the inner wall of the pen body 26.

[0054] The assembled writing instrument moves as follows:

[0055] In the initial non-use state, the pen tip 5 is located in the pen barrel 26 and is fixed in this position by the locking mechanism. At this time, the second elastic return member 21 is in a compressed state and pushes in the direction of the pressing portion 11. Since the third radial step surface 23 of the pen core 4 abuts in front of the fourth radial step surface 24 of the movable part 2, the pen core 4 can pull the movable part 2 to push in the same direction. The first elastic return member 13 is compressed between the first radial step surface 20 of the movable part 2 and the support member 25. When the pressing portion 11 is pressed to make the pen core 4 move axially forward, in the first stage, The pen tip 5 approaches the core hole 18, the second elastic reset member 21 is further compressed, the third radial step surface 23 of the pen core 4 moves axially forward, and the first elastic reset member 13 has space to extend, so that the push movable member 2 follows the pen core 4 and moves axially forward toward the core hole 18. At the same time, the push rod 8 slides axially in the push groove 9 in the direction away from the opening 10 and rotates radially, thereby driving the sealing part 3 to rotate forward and open the pen tip 5; continue to press to the second stage, the pen tip 5 continues to move toward the core hole 18, and the push rod 8 rests on the push groove 9 away from the opening The pen tip 5 is locked in the writing position by releasing the pressing portion 11. When the pen tip 5 needs to be retracted, the pressing portion 11 is pressed again and then released. The pen tip 4 moves axially backward under the restoring force of the second elastic restoring member 21. The third radial step surface 23 of the pen core 4 leaves the fourth radial step surface 24 of the movable member 2 and moves forward. The pen tip 5 passes over the sealing portion 3 and extends out of the core hole 18 and is in the writing position. The pressing portion 11 is released, and the pen core 4 can lock the writing position of the pen tip 5 by pressing the locking mechanism of the pen itself. When the pen tip 5 needs to be retracted, the pressing portion 11 is pressed again and then released. The pen core 4 moves axially backward under the restoring force of the second elastic restoring member 21. The third radial step surface 23 of the pen core 4 moves forward. The stepped surface 23 again abuts against the front of the fourth radial stepped surface 24 of the movable part 2, so that the pen core 4 can pull the movable part 2 to move axially backward, that is, the movable part 2 follows the pen core 4 to move axially backward. At the same time, the push rod 8 slides axially toward the opening 10 in the push groove 9 and rotates radially, thereby driving the sealing part 3 to rotate in the opposite direction and close the pen tip 5. At this time, the sealing part 3 abuts against the second sealing ring 19 to block the core hole 18 at the pen tip. The pen tip 5 is accommodated in the closed space formed by the first sealing ring 12 and the sealing part 3, and it is not easy for the ink to dry up.

Claims

1. A sealing assembly, characterized in that: The invention comprises a fixed seat (1), a movable member (2) axially movably arranged in the fixed seat (1), and a sealing portion (3) rotatably arranged at one end of the fixed seat (1); the movable member (2) is connected to the sealing portion (3) and is used to drive the sealing portion (3) to rotate in a positive direction to open the pen tip (5) or to rotate in a reverse direction to close the pen tip (5) when the movable member (2) follows the axial movement of the pen core (4); the sealing portion (3) is also provided with a return block (6) that can abut against the fixed seat (1) and is used to limit the closed position of the sealing portion (3).

2. A sealing assembly according to claim 1, characterized in that: Both sides of the sealing portion (3) are rotatably connected in the fixed seat (1), and both sides of the movable member (2) are movably connected in the sealing portion (3).

3. A sealing assembly according to claim 2, characterized in that: Two lugs (7) are symmetrically arranged at one end of the fixing seat (1) connected to the sealing portion (3), and both sides of the sealing portion (3) are rotatably connected to the inner sides of the two lugs (7).

4. A sealing assembly according to claim 3, characterized in that: Two return blocks (6) are provided and are located outside the sealing portion (3). When the sealing portion (3) rotates to the closed position, the two return blocks (6) respectively abut against the two lugs (7).

5. The sealing assembly according to claim 2, characterized in that: The movable part (2) is provided with a push rod (8), and the sealing part (3) is provided with a push groove (9). When the movable part (2) slides axially in the fixed seat (1), the push rod (8) slides axially in the push groove (9) and also rotates radially to drive the sealing part (3) to rotate.

6. A sealing assembly according to claim 5, characterized in that: The pushing groove (9) is arc-shaped, one end of the pushing groove (9) is an opening (10) and the other end extends inward.

7. The sealing assembly according to claim 5, characterized in that: Two push rods (8) are provided and symmetrically arranged on both sides of the outer side of the movable part (2); the number and position of the push grooves (9) match the push rods (8); and the axis connecting the two push rods (8) is parallel to the rotation axis of the sealing part (3).

8. The sealing assembly according to claim 1, characterized in that: It also includes a first sealing ring (12) for installation between the pen body (26) and the pen core (4), wherein the first sealing ring (12) is located on an end of the fixing seat (1) away from the sealing portion (3).

9. The sealing assembly according to claim 8, characterized in that: A first elastic reset member (13) is provided between the first sealing ring (12) and the movable member (2) for providing a force acting on the movable member (2) in the direction of the pen tip.

10. A writing tool comprising a pen holder (26) and a pen core (4), wherein a pressing portion (11) is provided at one end of the pen core (4) and a pen tip (5) is provided at the other end, characterized in that: A sealing assembly according to any one of claims 1 to 9 is provided inside the pen shaft (26) and outside the pen tip (5), and the movable part (2) of the sealing assembly can move axially following the pen core (4).

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