Pressure-type writing instrument

Abstract

Writing instrument of the pressure type, characterized in that it comprises: a pin cylinder (1), wherein the head of the pin cylinder is provided with an exit / entrance hole (11) and the end of the pin cylinder is equipped with a pressure application component, a pin core (2), the head of the pin core being provided with a pin tip (21), the pin core (2) being slidably arranged in the pin cylinder (1), the pin tip (21) being positioned near the exit / entrance hole (11), and the pressure-applying component being configured to drive the pin core (2) to be displaced in the pin cylinder (1), a spring (3) arranged in the pin cylinder (1) and designed to exert an elastic force on the pin core (2) in a direction away from the exit / entrance hole (11), a sealing component (4) comprising a first protective plate (41), a second protective plate (42), a shielding plate (43), and a connecting part (44), wherein the cross sections of the first protective plate (41) and the second protective plate (42) are arcuate, the first protective plate (41) and the second protective plate (42) are arranged opposite one another to form an installation channel, the shielding plate (43) is arranged at ends of the first protective plate and the second protective plate, a first flexible connecting portion (401) is formed between the shielding plate (43) and the first protective plate (41), the connecting part (44) is arranged between the first protective plate (41) and the second protective plate (42),a second flexible connecting portion (402) is formed between one end of the connecting part and the second protective plate (42) and a third flexible connecting portion (403) is formed between the other end of the connecting part and the shielding plate (43), , wherein the sealing component (4) is arranged in the pin cylinder (1), the pin core (2) is arranged in the installation channel and the shielding plate (43) is positioned at the exit / entrance hole (11), the pin core (2) is configured to drive the first protective plate (41) and the second protective plate (42) to move relative to each other upon extension from the pin cylinder (1), thereby causing the shielding plate (43) to fold open on the outside of the pin cylinder.

Description

TECHNICAL FIELD

[0001] The present invention relates to a writing instrument, in particular a pressure type writing instrument. BACKGROUND OF THE INVENTION

[0002] Currently, writing pens (such as signing pens, ballpoint pens, and gel pens) are essential stationery items in people's daily life and work. Writing pens can be categorized into push-type writing instruments and cap-type pens according to their usage methods. Push-type writing instruments are widely used due to their convenient operation. For push-type writing instruments that use ink, it is especially important to protect the pen tip from drying out. Various technical solutions for protecting the pen tip from drying out are documented in Chinese patent publication numbers CN108621640A, CN114103527A, and CN 111186230A. These solutions typically prevent drying out by covering the pen tip with a sealing part after it has retracted into the pen barrel.However, due to installation constraints, the sealing part must be located within the pin barrel to enable switching. This arrangement increases the radial dimension of the pin barrel to accommodate the sealing part's switching mechanism, resulting in a bulky overall pin size and a less comfortable grip.

[0003] In view of the foregoing, the technical problem to be solved by the present invention is to design a writing pen with a reduced radial dimension and improved grip comfort, thereby improving the user's experience. SUMMARY

[0004] The technical problem to be solved by the present invention is to provide a push-type writing instrument that reduces the radial dimension of the writing pen and optimizes the grip feel to improve the user's experience.

[0005] The technical solution provided by the present invention is a pressure type writing instrument comprising: a pin cylinder, wherein the head of the pin cylinder is provided with an exit / entrance hole and the end of the pin cylinder is equipped with a pressure application component, a pin core, wherein the head of the pin core is provided with a pin tip, the pin core is slidably arranged in the pin cylinder, the pin tip is positioned near the exit / entrance hole, and the pressure application component is configured to drive the pin core to be displaced in the pin cylinder, a spring disposed in the pin cylinder and configured to exert an elastic force on the pin core in a direction away from the exit / entrance hole, a sealing component comprising a first protective plate, a second protective plate, a shielding plate, and a connecting part, wherein the cross sections of the first protective plate and the second protective plate are arcuate, the first protective plate and the second protective plate are arranged opposite each other to form an installation channel, the shielding plate is arranged at ends of the first protective plate and the second protective plate, a first flexible connecting portion is formed between the shielding plate and the first protective plate, the connecting part is arranged between the first protective plate and the second protective plate, a second flexible connecting portion is formed between one end of the connecting part and the second protective plate, and a third flexible connecting portion is formed between the other end of the connecting part and the shielding plate, wherein the sealing component is arranged in the pin cylinder, the pin core is arranged in the installation channel and the shielding plate is positioned at the exit / entrance hole, the pin core is configured to drive the first protection plate and the second protection plate to move relative to each other upon extension from the pin cylinder, thereby causing the shielding plate to flip open on the outside of the pin cylinder.

[0006] By placing a sealing component on the pen barrel, the sealing component using two opposing first and second protection plates to form an installation channel for the pen core installation, and by using a shield plate to close the exit / entrance hole of the pen barrel to prevent the pen tip from drying out, users can extend the pen tip to the outside of the pen barrel while using a push-type writing instrument. This extension movement of the pen tip also drives the sealing component, resulting in relative displacement between the first and second protection plates, and consequently, the shield plate on the outside of the pen barrel unfolds to expose the pen tip.Since the shielding plate completes the folding process outside the pin cylinder, it does not occupy the internal space of the pin cylinder, effectively reducing the radial dimension of the pin cylinder, meeting the design requirements for a smaller pin cylinder, and optimizing the grip feel to improve the user experience. DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic diagram of a pressure-type writing instrument in a closed state according to a first embodiment of the present invention, Fig. Fig. 2 is a schematic diagram of a pressure-type writing instrument in an open state according to a first embodiment of the present invention, Fig. 3 is an arrangement diagram of the pin core and the sealing component in Fig. 1, Fig. 4 is an arrangement diagram of the pin core and the sealing component in Fig. 2, Fig. Fig. 5 is a partial sectional view of the pressure type writing instrument in the closed state according to the first embodiment of the present invention, Fig. Figure 6 is a schematic enlarged view of region A in Fig. 5, Fig. Fig. 7 is a partial sectional view of the push-type writing instrument in the open state according to the first embodiment of the present invention, Fig. Figure 8 is a schematic enlarged view of region B in Fig. 7, Fig. Figure 9 is a schematic enlarged view of region C in Fig. 7, Fig. 10 is a structural schematic diagram of the pin core in Fig. 1, Fig. 11 is a partial sectional view of the pin cylinder in Fig. 1, Fig. 12 is a partially sectional view of the pressure-type writing instrument in the closed state according to a second embodiment of the present invention, Fig. Figure 13 is a schematic enlarged view of region M in Fig. 12, Fig. 14 is a partial sectional view of the push-type writing instrument in the open state according to a second embodiment of the present invention, Fig. 15 is an exploded view of the arrangement of the pressure applying component and the pen core in the second embodiment of the pressure type writing instrument. DETAILED DESCRIPTION

[0007] First embodiment: As in Fig. As shown in Figures 1 to 7, the present invention provides a pressure-type writing instrument comprising: a pen cylinder 1, a pen core 2, a spring 3, and a sealing component 4. The head of the pen cylinder 1 is opened with an exit / entrance hole 11, and the end of the pen cylinder 1 is equipped with a pressure-applying component (the physical representation of the pressure-applying component may be a pen cap or other structures disclosed in the prior art). The head of the pen core 2 has a pen tip 21, and the pen core 2 is slidably installed in the pen cylinder 1. The pen tip 21 is located near the exit / entrance hole 11, and the pressure-applying component is configured to be pressed and slid by the user to drive the pen core 2 to be slid into the pen cylinder 1.The spring 3 is installed in the pin cylinder 1 and exerts an elastic force on the pin core 2 in the direction away from the exit / entrance hole 11. The sealing component 4 includes a first protection plate 41, a second protection plate 42, a shielding plate 43, and a connecting part 44. The cross sections of the first protection plate 41 and the second protection plate 42 are arcuate. The first protection plate 41 and the second protection plate 42 are arranged opposite each other to form an installation channel. The shielding plate 43 is arranged at the ends of the first protection plate 41 and the second protection plate 42. A first flexible connecting portion 401 is formed between the shielding plate 43 and the first protection plate 41, and the connecting part 44 is located between the first protection plate 41 and the second protection plate 42.A second flexible connecting portion 402 is formed between one end of the connecting part 44 and the second protective plate 42, and a third flexible connecting portion 403 is formed between the other end of the connecting part 44 and the shielding plate 43. The sealing component 4 is inserted into the pin cylinder 1, the pin core 2 is inserted into the installation channel, and the shielding plate 43 is arranged at the exit / entrance hole 11. The pin core 2 is configured to drive the first protective plate 41 and the second protective plate 42 to move relative to each other upon extension from the pin cylinder 1, thereby causing the shielding plate 43 to pop up on the outside of the pin cylinder 1.

[0008] Specifically, the first protection plate 41 and the second protection plate 42 of the sealing component 4 are arranged outside the pin core 2 during assembly. The sealing component 4 and the pin core 2 are installed in the pin cylinder 1, and the shield plate 43 is provided at the exit / entrance hole 11. The pressure application component abuts the pin core 2, and the spring 3 is located in the pin cylinder 1, whereby pressure is applied between the pin core 2 and the pin cylinder 1 to provide an elastic restoring force.

[0009] During use, when the user needs to write with the push-type writing instrument, the pressure application component is pressed to cause the pen core 2 to shift toward the outside of the pen cylinder 1. During the shifting operation of the pen core 2, it drives the sealing component 4 to move inside the pen cylinder 1, causing the shield plate 43 to move toward the outside of the exit / entrance hole 11. Meanwhile, the pen core 2 drives the first protection plate 41 and the second protection plate 42 to generate relative movement.The flexible connections of the shield plate 43 between the first protective plate 41 and the second protective plate 42 allow the shield plate 43 to rotate relative to the first protective plate 41 through the first flexible connecting portion 401. Also, the flexible connecting portions formed at both ends of the connecting part 44 provide the force for the shield plate 43 to fold toward the first protective plate 41 after the relative movement generated between the first protective plate 41 and the second protective plate 42. Finally, the shield plate 43 folds open on the outside of the pen barrel 1 to expose the pen tip 21. Thus, the user can continue writing.After the user completes use, pressing the pressure-applying component again causes the pen core 2 and the sealing component 4 to move in the opposite direction under the action of the spring 3. The pen tip 21 finally retracts into the pen cylinder 1, and the shield plate 43 returns to block the exit / entrance hole 11.

[0010] During the process of sliding the pin core 2 within the pin cylinder 1, causing the pin tip 21 to extend from the exit / entry hole 11 to the outside of the pin cylinder 1, the first protection plate 41 and the second protection plate 42 are sequentially positioned on the pin cylinder 1 along the moving direction of the pin core 2. Furthermore, during the process of sliding the first protection plate 41 onto the pin cylinder 1 while the second protection plate 42 continues to move with the pin core 2, the shield plate 43 folds to open the installation channel on the outside of the pin cylinder 1. Specifically, during the process of sliding and extending the pin core 2, the first protection plate 41 and the second protection plate 42 move together with the pin core 2 in the first phase, causing the shield plate 43 to extend from the exit / entry hole 11.As the pin core 2 continues to move, the first protection plate 41 is fixed by the position of the pin cylinder 1, while the second protection plate 42 continues to move with the pin core 2, thereby achieving relative movement between the first protection plate 41 and the second protection plate 42. This movement, in turn, drives the shield plate 43 to unfold on the outside of the pin cylinder 1.

[0011] By placing a sealing component on the pen barrel, the sealing component using two opposing first and second protection plates to form an installation channel for the pen core installation, and using a shielding plate to close the exit / entrance hole of the pen barrel, the pen nib can be prevented from drying out. Users can extend the pen nib to the outside of the pen barrel while using a push-type writing instrument. This extension movement of the pen nib also drives the sealing component, resulting in relative displacement between the first and second protection plates, and consequently, the shielding plate on the outside of the pen barrel unfolds to expose the pen nib.Since the shielding plate completes the folding process outside the pin cylinder, it does not occupy the internal space of the pin cylinder, effectively reducing the radial dimension of the pin cylinder, meeting the design requirements for a smaller pin cylinder, and optimizing the grip feel to improve the user experience.

[0012] In some embodiments, the inner wall of the pin cylinder 1 is provided with a protruding positioning rib 13, the outer wall of the first protection plate 41 is provided with a first positioning protrusion 411, and the outer wall of the second protection plate 42 is provided with a second positioning protrusion 421. When the pin tip 21 is retracted into the pin cylinder 1, the distance from the first positioning protrusion 411 to the positioning rib 13 is less than the distance from the second positioning protrusion 421 to the positioning rib 13. Specifically, in order to sequentially position the first protection plate 41 and the second protection plate 42 during the process in which the pin core 2 drives the sealing component 4 to move together, the first positioning protrusion 411 and the second positioning protrusion 421 are provided on the first protection plate 41 and the second protection plate 42, respectively.To achieve sequential positioning of the first protection plate 41 and the second protection plate 42 during the movement of the pin core 2, the distances between the first positioning protrusion 411 and the positioning rib 13 and between the second positioning protrusion 421 and the other positioning rib 13 are designed to be different. With this arrangement, during the movement of the sealing component 4 with the pin core 2, the first positioning protrusion 411 first contacts the positioning rib 13 to position the first protection plate 41 without moving with the pin core 2, and then, after further movement, the second positioning protrusion 421 contacts the positioning rib 13 to position the second protection plate 42 without moving with the pin core 2.

[0013] In another embodiment, the first protection plate 41 is provided with a first elastic part 412 and the second protection plate 42 is provided with a second elastic part 422. The outer wall of the pin core 2 is provided with a first driving part 22 and a second driving part 23. The first driving part 22 is configured to abut the free end of the first elastic part 412 to exert a compressive force thereon when the pin core 2 is displaced and extended and drives the first protection plate 41 to move together with the pin core 2. The second driving part 23 is configured to abut the free end of the second elastic part 422 to exert a compressive force when the pin core 2 is displaced and extended and drives the second protection plate 42 to move together with the pin core 2.Specifically, during the process of extending the pin core 2 from the pin cylinder 1, the pin core 2 first drives the first protection plate 41 and the second protection plate 42 to move synchronously, and then, after the first protection plate 41 and the second protection plate 42 are restricted by the positioning rib 13, the pin core 2 is slid alone. In order to reliably drive the two protection plates to move, the first driving part 22 and the second driving part 23 are arranged on both sides of the pin core 2. For example, in the cooperation between the first driving part 22 and the first elastic part 412 to cause the intermittent movement of the first protection plate 41, when the user presses the pressure application component to drive the pin core 2 to extend outward, the first driving part 22 abuts against the first elastic part 412 to drive the first protection plate 41 to move.When the first positioning protrusion 411 on the first protection plate 41 abuts the positioning rib 13, the first elastic member 412 undergoes deformation to detach from the first driving member 22, allowing the pin core 2 to continue moving. Similarly, the driving mode of the second driving member 23 and the second elastic member 422 is the same as the above explanation and will not be repeated here.

[0014] Wherein, the first driving part 22 and the second driving part 23 are grooved structures formed on the outer wall of the pin core 2. During use, with the cooperation of the first driving part 22 with the first elastic part 412, for example, when the pin core 2 drives the first protection plate 41 to move, the free end of the first elastic part 412 is inserted into the groove structure, and when the first protection plate 41 is positioned by the first positioning protrusion 411 and the positioning rib 13, the free end of the first elastic part 412 is deformed by the groove structure and detached from the groove structure.

[0015] Alternatively, the first driving part 22 and the second driving part 23 are protruding structures formed on the outer wall of the pin core 2. During use, with the cooperation of the first driving part 22 with the first elastic part 412, for example, when the pin core 2 drives the first protection plate 41 to move, the free end of the first elastic part 412 is inserted on the outside of the protruding structure, and when the first protection plate 41 is positioned by the first positioning protrusion 411 and the positioning rib 13, the free end of the first elastic part 412 is deformed by the protruding structure and detached from the protruding structure.

[0016] Additionally, to improve the uniformity of pressure application, the free end of the first elastic member 412 is provided with a first protrusion 413 protruding toward the inner wall of the pin cylinder 1, and the free end of the second elastic member 422 is provided with a second protrusion 423 protruding toward the inner wall of the pin cylinder 1. The inner wall of the pin cylinder 1 is provided with a first avoidance groove 14 and a second avoidance groove 15. The first avoidance groove 14 is configured to receive the first protrusion 413 when the first positioning protrusion 411 engages the positioning rib 13, thereby causing the first elastic member 412 to detach from the first drive member 22.The second avoidance groove 15 is configured to receive the second protrusion 423 when the second positioning protrusion 421 engages with the positioning rib 13, thereby causing the second elastic member 422 to disengage from the second drive member 23. Specifically, in order to improve the uniformity of the user's pressing action when the pressing component is pressed, the avoidance grooves are formed on the inner wall of the pin cylinder 1 to receive the elastic members after the protective plates are positioned, thereby ensuring that the pin core 2 can be smoothly slid after the protective plates are positioned.Taking the first protection plate 41 as an example, in the retracted state of the pin core 2, the first protrusion 413 abuts against the inner wall of the pin cylinder 1, causing the first elastic member 412 to elastically deform toward the pin core 2, thereby allowing the free end of the first elastic member 412 to engage the first driving member 22. When the pin core 2 is displaced outward as the first positioning protrusion 411 engages the positioning rib 13, the first protrusion 413 is displaced into the first avoidance groove 14, and the first elastic member 412 resets using its own elasticity and positions itself within the first avoidance groove 14, thereby allowing the first elastic member 412 to automatically disengage from the first driving member 22.In this way, after the first protective plate 41 is positioned, the user can continue to press smoothly to move the pen core 2.

[0017] In a specific embodiment, the first protection plate 41 is provided with a first hollow opening 414, and the first elastic member 412 is located in the first hollow opening 414. The second protection plate 42 is provided with a second hollow opening 424, and the second elastic member 422 is located in the second hollow opening 424. To achieve a compact design, the first protection plate 41 is specifically formed with the first hollow opening 414 to accommodate the first elastic member 412. Similarly, the second protection plate 42 is formed with the second hollow opening 424 to accommodate the second elastic member 422, thereby reducing the overall length dimension of the sealing component 4 and meeting the requirements of a compact design.

[0018] In another embodiment, in order to pull and retract the first protection plate 41 and the second protection plate 42 by the pin core 2 during their retraction into the pin cylinder 1, the end of the first protection plate 41 remote from the exit / entry hole 11 is provided with a first pulling part 415 extending toward the second protection plate 42, and the end of the second protection plate 42 remote from the exit / entry hole 11 is provided with a second pulling part 425 extending toward the first protection plate 41. The first pulling part 415 and the second pulling part 425 are arranged opposite each other. The outer wall of the pin core 2 is provided with a projection 24, and the projection 24 is configured to sequentially pull the second pulling part 425 and the first pulling part 415 during the sliding retraction of the pin core 2.Specifically, for a pressure-type writing instrument, in the writing state, when the user presses the pressure-applying component again and releases it, the pen core 2 moves backward under the action of the spring 3 and resets. During the backward movement of the pen core 2, the protrusion 24 sequentially abuts against the first pulling part 415 and the second pulling part 425, ultimately driving the first protection plate 41 and the second protection plate 42 to reset. In this process, when the protrusion 24 first abuts against the first pulling part 415 to pull the first protection plate 41 to move, the shield plate 43 flips in reverse and blocks the installation channel formed by the first protection plate 41 and the second protection plate 42. Then, the protrusion 24 abuts against the second pulling part 425.As the pin core 2 continues to move, the projection 24 synchronously pulls the first protection plate 41 and the second protection plate 42, causing the shield plate 43 to retract and cover the exit / entrance hole 11. Finally, the pin core 2 and the sealing component 4 are reset.

[0019] In one embodiment, a guide groove (not marked) is formed between the relative edges of the first protection plate 41 and the second protection plate 42. The projection 24 is slidably disposed in the guide groove, and the first pulling member 415 and the second pulling member 425 are located at the end of the guide groove away from the exit / entrance hole 11.

[0020] In another embodiment, to improve sealing, the pressure-type writing instrument also includes a sealing ring 5 sheathed on the pen core 2. The outer edge of the sealing ring 5 is pressed against the inner wall of the pen cylinder 1. When the pen core 2 is retracted into the pen cylinder 1, the shielding plate 43 blocks the exit / entrance hole 11, and the shielding plate 43 and the sealing ring 5 form a sealed space between the pen cylinder 1 and the pen core 2, with the pen tip 21 located in the sealed space. Specifically, when the pen core 2 is in the retracted state, the exit / entrance hole 11 is covered by the shielding plate 43, and the sealing ring 5 on the pen core 2 contacts the inner wall of the pen cylinder 1.This arrangement allows the pen tip 21 to be located in a relatively sealed space created between the shielding plate 43 and the sealing ring 5 within the pen cylinder 1, thereby effectively preventing the pen tip 21 from drying out.

[0021] In a second embodiment, based on the first embodiment, the pressure-type writing instrument typically includes a pressure-applying component 6 in the pen cylinder 1 to achieve a pressure-applying operation as shown in Fig. 12-15 shown.

[0022] In this embodiment, the head of the pin cylinder 1 is opened with an exit / entrance hole 11, and the inner wall at the end of the pin cylinder 1 is provided with a plurality of guide ribs 12. The inner wall of the pin cylinder 1 also has a positioning element 10, with the guide ribs 12 extending along the length of the pin cylinder 1 and arranged on the outside of the positioning element 10. The head of the pin core 2 is equipped with a pin tip 21, and the pin core 2 is slidably arranged in the pin cylinder 1, with the pin tip 21 located near the exit / entrance hole 11. The spring 3 is arranged in the pin cylinder 1 and configured to exert an elastic force on the pin core 2 in the direction away from the exit / entrance hole 11. The pressure application component 6 includes a pressure application part 61, an extension rod 62 and a movable gear 63.The end of the pressure-exerting part 61 is provided with guide teeth 611, and the pressure-exerting part 61 is slidably mounted on the end of the pin cylinder 1. The movable gear 63 is located between adjacent guide ribs 12, and the extension rod 62 is provided on the pressure-exerting part 61 and abuts the pin core 2. The movable gear 63 is sheathed on the outside of the extension rod 62 and is located between the positioning element 10 and the guide teeth 611.

[0023] Specifically, during use, the pen core 2 is first retracted into the pen cylinder 1 by the user. When the user presses the pressure-applying part 61, the pressure-applying part 61 moves under pressure toward the inside of the pen cylinder 1, and during this movement, drives the extension rod 62 to move synchronously. Thus, the extension rod 62 directly transmits power to the pen core 2. Under the action of the extension rod 62, the pen core 2 overcomes the spring force and moves within the pen cylinder 1, ultimately causing the pen tip 21 to extend from the exit / entrance hole 11 to the outside of the pen cylinder 1.

[0024] During the process in which the pressure application component 61 drives the pin core 2 through the extension rod 62, the guide teeth 611 are displaced along the guide ribs 12 on the inner wall of the pin cylinder 1 and abut against the movable gear 63. This arrangement causes the movable gear 63 to be displaced along the guide ribs 12. During this displacement process, the teeth of the movable gear 63 become disengaged between the two guide ribs 12. At this point, since the pin core 2 is always abutted by the extension rod 62, the elastic force generated by the spring cannot be transmitted through the pin core 2 to the movable gear 63, thereby preventing the movable gear 63 from jumping backward.After the movable gear 63 is released from the two guide ribs 12, the guide teeth 611 continue to compress the tooth structure on the movable gear 63, causing the movable gear 63 to rotate.

[0025] The positional connection relationship between the movable gear 63 and the associated components changes for different states of the pressure type writing instrument during use, and the specific explanation is as follows.

[0026] When the pin core 2 is retracted, there are gaps between the movable gear 63 and the end of the pin core 2 or the guide teeth 611. Specifically, when the pin core 2 is retracted, the movable gear 63 can move freely between the pin core 2 and the guide teeth 611 by a smaller distance. For example, when the head of the pin cylinder 1 faces downward, the movable gear 63 contacts the pin core 2 and creates a gap with the guide teeth 611. Conversely, when the end of the pin cylinder 1 faces downward, the movable gear 63 contacts the guide teeth 611 and creates a gap with the pin core 2. With this arrangement, when the user presses, the pin core 2 directly receives pressure from the extension rod 62, and the movable gear 63 does not transmit power to drive the pin core 2 to extend.

[0027] When the pressure-exerting component 61 is at the maximum pressure-exerting stroke position, the movable gear 63 abuts against the positioning member 10. Specifically, when the user pushes the pressure-exerting component 61 downward, the movable gear 63 abuts against the positioning member 10 to limit its movement. This prevents the movable gear 63 from exerting pressure on the pin core 2 and limits the movement stroke of the movable gear 63.

[0028] In addition, in the extended position where the pen tip 21 is in the writing state, the pen core 2 abuts against the movable gear 63, causing the movable gear 63 to be clamped between the pen core 2 and the guide ribs 12. Specifically, in the writing state, since the pressure-applying component is no longer under pressure, the pen core 2 exerts pressure on the movable gear 63 under the action of the spring 3 to position it against the guide ribs 12.

[0029] In some embodiments, the positioning element 10 is an integrated positioning rib formed on the inner wall of the pin cylinder 1. Specifically, the positioning rib may be integrally machined onto its inner wall during the manufacturing process of the pin cylinder 1 to function as the positioning element 10. Alternatively, in another embodiment, the positioning element 10 is a positioning sleeve inserted into the pin cylinder 1. Alternatively, in another embodiment, the pin cylinder includes an upper cylinder (not marked) and a lower cylinder (not marked), the upper cylinder and the lower cylinder being detachably connected to each other. The lower cylinder extends into the end surface of the upper cylinder to form the positioning element.

[0030] In some embodiments, the free end of the extension rod 62 is equipped with a pressure plate 621, and the pressure plate 621 abuts the pin core 2. Specifically, to simplify assembly, a pressure plate 621 is located on the extension rod 62. During assembly, the movable gear 63 is sheathed on the extension rod 62 and supported by the pressure plate 621. Then, the extension rod 62 is inserted into the pressure-applying component for fixation, and the pressure-applying component 61, the extension rod 62, and the movable gear 63 are assembled and loaded into the pin cylinder 1.

[0031] By placing the extension rod on the pressure-applying part of the pressure-applying component and using it to abut against the pin core in the pin cylinder, the extension rod displaces the movable gear by directly exerting force on the pin core to drive its displacement movement in the pin cylinder. In this way, while the user presses the pressure-applying component to apply pressure, the extension rod always abuts against the pin core, and the elastic force generated by the spring is not transmitted to the movable gear via the pin core. As a result, when the movable gear leaves the end of the guide ribs, the movable gear does not move backward due to the action of the spring force to generate an impact sound, thereby reducing the impact sound generated during the pressure-applying process and improving the user experience.

[0032] Finally, it should be noted that the above embodiments are used merely to illustrate the technical solutions of the present invention and not to limit them. Although the technical solutions have been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalents to some technical features can still be made based on the above. These modifications or replacements do not deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention. QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] CN 108621640A

[0002] CN 114103527A

[0002] CN 111186230A

[0002]

Claims

[1] Pressure-type writing instrument, characterized by that it includes: a pin cylinder (1), wherein the head of the pin cylinder is provided with an exit / entrance hole (11) and the end of the pin cylinder is equipped with a pressure application component, a pin core (2), the head of the pin core being provided with a pin tip (21), the pin core (2) being slidably arranged in the pin cylinder (1), the pin tip (21) being positioned near the exit / entrance hole (11), and the pressure-applying component being configured to drive the pin core (2) to be displaced in the pin cylinder (1), a spring (3) arranged in the pin cylinder (1) and designed to exert an elastic force on the pin core (2) in a direction away from the exit / entrance hole (11), a sealing component (4) comprising a first protective plate (41), a second protective plate (42), a shielding plate (43), and a connecting part (44), wherein the cross sections of the first protective plate (41) and the second protective plate (42) are arcuate, the first protective plate (41) and the second protective plate (42) are arranged opposite one another to form an installation channel, the shielding plate (43) is arranged at ends of the first protective plate and the second protective plate, a first flexible connecting portion (401) is formed between the shielding plate (43) and the first protective plate (41), the connecting part (44) is arranged between the first protective plate (41) and the second protective plate (42),a second flexible connecting portion (402) is formed between one end of the connecting part and the second protective plate (42) and a third flexible connecting portion (403) is formed between the other end of the connecting part and the shielding plate (43), wherein the sealing component (4) is arranged in the pin cylinder (1), the pin core (2) is arranged in the installation channel and the shielding plate (43) is positioned at the exit / entrance hole (11), the pin core (2) is configured to drive the first protection plate (41) and the second protection plate (42) to move relative to each other upon extension from the pin cylinder (1), thereby causing the shielding plate (43) to fold open on the outside of the pin cylinder. [2] A pressure-type writing instrument according to claim 1, characterized bythat when the pin core (2) is slid in the pin cylinder (1) to cause the pin tip (21) to extend from the exit / entrance hole (11) to the outside of the pin cylinder, the first protection plate (41) and the second protection plate (42) are sequentially positioned on the pin cylinder (1) in the moving direction of the pin core, when the first protection plate (41) is positioned on the pin cylinder (1) and the second protection plate (42) continues to move with the pin core (2), the shielding plate (43) on the outside of the pin cylinder folds to open the installation channel. [3] A pressure-type writing instrument according to claim 1, characterized bythat the inner wall of the pin cylinder is provided with a protruding positioning rib, the outer wall of the first protective plate is provided with a first positioning projection (411), the outer wall of the second protective plate is provided with a second positioning projection (421), when the pin tip (21) is retracted into the pin cylinder (1), the distance between the first positioning projection (411) and the positioning rib is less than the distance between the second positioning projection (421) and the positioning rib. [4] A pressure-type writing instrument according to claim 3, characterized by , that the first protective plate (41) is provided with a first elastic part (412) and the second protective plate (42) is provided with a second elastic part (422), the outer wall of the pin core is provided with a first drive part (22) and a second drive part (23), wherein the first drive part (22) is designed to abut against the free end of the first elastic part in order to exert pressure thereon when the pin core (2) is displaced and extended and drives the first protection plate (41) to move together with the pin core (2), and the second drive part (23) is designed to abut against the free end of the second elastic part in order to exert pressure thereon when the pin core (2) is displaced and extended and drives the second protection plate (42) to move together with the pin core (2). [5] A pressure-type writing instrument according to claim 4, characterized bythat the first drive part (22) and the second drive part (23) are groove structures formed on the outer wall of the pin core, or the first drive part (22) and the second drive part (23) are protruding structures formed on the outer wall of the pin core. [6] A pressure-type writing instrument according to claim 4, characterized by , that the free end of the first elastic part has a first projection which projects towards the inner wall of the pin cylinder, and the free end of the second elastic part has a second projection which projects towards the inner wall of the pin cylinder, the inner wall of the pin cylinder is provided with a first avoidance groove (14) and a second avoidance groove (15), wherein the first positioning projection (411) is configured to receive the first projection when the first positioning projection (411) engages with the positioning rib, thereby causing the first elastic member to detach from the first drive member (22), the second avoidance groove (15) is configured to receive the second projection when the second positioning projection (421) engages with the positioning rib, thereby causing the second elastic member to detach from the second drive member (23). [7] A pressure-type writing instrument according to claim 6, characterized bythat the first protective plate (41) is provided with a first hollow opening and the first elastic part (412) is located in the first hollow opening, the second protective plate (42) is provided with a second hollow opening and the second elastic part (422) is located in the second hollow opening. [8] A pressure-type writing instrument according to claim 4, characterized bythat the end of the first protection plate remote from the exit / entrance hole (11) is provided with a first pulling part (415) extending to the second protection plate, and the end of the second protection plate remote from the exit / entrance hole (11) is provided with a second pulling part (425) extending to the first protection plate, wherein the first pulling part (415) and the second pulling part (425) are arranged opposite to each other, the outer wall of the pin core is provided with a projection, and the projection is configured to sequentially pull the second pulling part (425) and the first pulling part (415) during the displacement retraction operation of the pin core. [9] A pressure-type writing instrument according to claim 8, characterized bythat a guide groove is formed between the respective edges of the first protective plate and the second protective plate, the projection is slidably arranged in the guide groove and the first pulling part (415) and the second pulling part (425) are located at the end of the guide groove away from the exit / entrance hole (11). [10] A pressure-type writing instrument according to claim 1, characterized by that it comprises a sealing ring (5) which is sheathed on the pin core (2), the outer edge of the sealing ring is pressed against the inner wall of the pin cylinder, in a state in which the pin core (2) is retracted into the pin cylinder (1), the shielding plate (43) blocks the exit / entrance hole (11) and the shielding plate (43) and the sealing ring (5) form a sealed space between the pin cylinder (1) and the pin core (2), wherein the pin tip (21) is located in the sealed space.

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