Valve type impact-resistant refill

Abstract

The utility model provides a valve type anti-impact pen refill which comprises an oil pipe, an anti-impact pen core, an anti-impact pen core, an anti-impact pen core, an anti-impact pen core and an anti-impact pen core, the rear end part of the connecting section is connected with the front end part of the oil pipe, and the connecting section is provided with a hollow connecting section cavity; the pen point is arranged at the front end part of the connecting section, the pen point comprises a mounting section and a pen point, the rear end part of the mounting section is connected with the connecting section, the pen point is detachably mounted at the front end part of the mounting section, and the mounting section and the pen point are respectively provided with a hollow mounting section cavity and a pen point cavity; the pen point cavity, the mounting section cavity, the connecting section cavity and the oil pipe cavity are sequentially communicated, and an ink passing and stopping structure is arranged in the connecting section cavity and used for preventing ink in the pen point cavity and the mounting section cavity from flowing back into the oil pipe cavity.

Description

Technical Field

[0001] The utility model belongs to the technical field of writing tools, and in particular relates to a valve-type impact-resistant pen core. Background Art

[0002] Gel pens are a common writing tool, known for their smooth writing and ease of use. However, when a gel pen is written with the tip pointing upward, or is dropped or bumped, the ink within the pen tip can flow away from the tip due to gravity and back into the tubing. This creates a vacuum at the tip, preventing the ink from flowing continuously and interrupting the writing process.

[0003] Furthermore, existing pen tips typically consist of a writing nib and an integrally formed mounting section for attaching to the tubing. This not only complicates the production process but also increases manufacturing costs. Producing different sizes of gel pens requires nibs of varying specifications, significantly increasing production costs. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies in the prior art, the purpose of the present invention is to provide a valve-type impact-resistant pen refill.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a valve-type impact-resistant pen core, which has the following characteristics: an oil pipe, which has a hollow oil pipe cavity for storing ink; a connecting section, whose rear end is connected to the front end of the oil pipe and has a hollow connecting section cavity; and a pen tip, which is arranged at the front end of the connecting section, wherein the pen tip includes a mounting section, whose rear end is connected to the connecting section, and a pen tip detachably mounted at the front end of the mounting section, the mounting section and the pen tip respectively having a hollow mounting section cavity and a pen tip cavity, the pen tip cavity, the mounting section cavity, the connecting section cavity and the oil pipe cavity are sequentially connected, and an ink through-stop structure is provided in the connecting section cavity, which is used to prevent ink in the pen tip cavity and the mounting section cavity from flowing back into the oil pipe cavity.

[0007] The valve-type impact-resistant pen refill provided by the present invention may also have the following features: wherein, the ink flow-stop structure includes an eccentric tapered hole, a ball, and a guide member; the eccentric tapered hole is arranged in the connecting section cavity, serving as the only communication passage between the mounting section cavity and the oil pipe cavity; the eccentric tapered hole has a tapered surface facing the pen tip; the central axis of the eccentric tapered hole is offset to a certain extent from the central axis of the mounting section cavity; the ball is movably arranged in the connecting section cavity and located between the tapered surface and the mounting section; it can cooperate with the tapered surface under the action of gravity to block the communication passage to prevent the ink from moving backward, and disengage from the tapered surface under the action of gravity to allow the ink in the oil pipe cavity to flow into the mounting section cavity and the pen tip cavity through the communication passage; the guide member is arranged on one side of the eccentric tapered hole close to the mounting section cavity, for guiding the ball to reciprocate back and forth within a fixed stroke distance in the connecting section cavity.

[0008] The valve-type impact-resistant pen core provided by the present invention may also have the following features: wherein the rear end portion of the mounting section is inserted into the cavity of the connecting section, and the rear end portion of the mounting section and the tapered surface of the eccentric tapered hole together define a fixed stroke distance.

[0009] The valve-type impact-resistant pen refill provided by the present invention may also have the following feature: wherein the fixed stroke distance is 0.8-1.1 mm.

[0010] The valve-type impact-resistant pen refill provided by the present invention may also have the following feature: wherein the guide member is a guide rib starting from the conical surface and extending toward the pen tip.

[0011] The valve-type impact-resistant gel pen refill provided by the present invention may also have the following feature: the number of the guide ribs is two, and the two guide ribs are arranged at intervals.

[0012] The valve-type impact-resistant pen core provided by the present invention may also have the following feature: the inner side surface of the guide rib gradually tilts inward along the direction toward the pen tip.

[0013] The valve-type impact-resistant pen core provided by the present invention may also have the following feature: the rear end portion of the pen tip is inserted into the cavity of the mounting section.

[0014] Function and effect of utility model

[0015] According to the valve-type impact-resistant pen core involved in the utility model, since it has an oil pipe, a connecting section and a pen head connected in sequence, the pen head includes a mounting section whose rear end is connected to the connecting section and a pen tip detachably mounted on the front end of the mounting section. An ink through-stop structure is provided in the cavity of the connecting section, which can prevent the ink in the pen tip cavity and the mounting section cavity from flowing back into the oil pipe cavity, thereby solving the problem of broken writing lines when the neutral pen writes with the pen head facing upward, encounters a fall or collision, and makes the writing process more streamlined; moreover, the pen head adopts a split structure consisting of a detachable pen tip and a mounting section. For neutral pens of different specifications, there is no need to equip them with integral pen heads of different specifications, but only with pen tips of different specifications, which reduces the difficulty of the production process and also reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the valve-type impact-resistant pen core in the embodiment of the present utility model;

[0017] Figure 2 is a schematic diagram of the exploded installation of the connecting section and the pen tip in an embodiment of the present utility model; and

[0018] Figure 3 It is a cross-sectional view of the connecting section in an embodiment of the present utility model. DETAILED DESCRIPTION

[0019] The concept, specific structure and technical effects of the present invention will be further described below in conjunction with the accompanying drawings to fully understand the purpose, characteristics and effects of the present invention.

[0020] <Example>

[0021] Figure 1 It is a structural schematic diagram of a valve-type impact-resistant pen core in an embodiment of the present utility model.

[0022] like Figure 1 As shown, a valve-type impact-resistant pen refill 10 provided in this embodiment includes an oil pipe 11 , a connecting section 12 and a pen tip 13 connected in sequence.

[0023] like Figure 1 As shown, the oil tube 11 is a hollow long tube having an oil tube cavity 11 a , in which ink 111 is stored.

[0024] In this embodiment, lithium-based grease 112 is provided in the oil tube cavity 11a at the rear end of the ink 111 (i.e., the end away from the pen tip 13), which acts as a seal to prevent the ink from flowing out of the rear end of the oil tube 11.

[0025] Figure 2 This is a schematic diagram of the exploded installation of the connecting section and the pen tip in the embodiment of the present utility model; Figure 3It is a cross-sectional view of the connecting section in an embodiment of the present utility model.

[0026] like Figures 1 to 3 As shown, the rear end of the connecting section 12 is connected to the front end of the oil pipe 11 by being inserted into the oil pipe cavity 11a. The connecting section 12 is a hollow structure having a connecting section cavity 12a communicating with the oil pipe cavity 11a.

[0027] like Figure 1 and Figure 2 As shown, the pen tip 13 is arranged at the front end of the connecting section 12 and includes a mounting section 131 and a pen tip 132 .

[0028] The mounting section 131 is used to mount the pen tip 132 on the connecting section 12, and its rear end is connected to the connecting section 12 by being inserted into the connecting section cavity 12a. The mounting section 131 is a hollow structure having a mounting section cavity 131a communicating with the connecting section cavity 12a.

[0029] The pen tip 132 is used to complete the writing action. The rear end thereof is installed at the front end of the mounting section 131 in a manner that it can be detachably inserted into the mounting section cavity 131a, and has a pen tip cavity (not shown in the figure) connected to the mounting section cavity 131a.

[0030] In this embodiment, if Figures 1 to 3 As shown, an ink flow-stop structure 14 is provided within the connecting section cavity 12 to prevent ink within the nib cavity and the mounting section cavity 131a from flowing back into the tubing cavity 11, thereby preventing line breakage. The ink flow-stop structure 14 comprises an eccentric tapered hole 141, a ball 142, and two guides 143.

[0031] An eccentric tapered hole 141 is located within the connecting section cavity 12a, near the tip 13. It divides the interior of the connecting section cavity 12a into front and rear sections, thus forming the sole connection between the mounting section cavity 131a and the oil pipe cavity 11a. In this embodiment, the eccentric tapered hole 141 has a tapered surface 141a facing the tip 13, and its central axis is offset from the central axis of the mounting section cavity 131a.

[0032] Ball 142 is positioned within connecting section cavity 12a, between tapered surface 141a and mounting section 131. Its weight is greater than the buoyancy of the ink, enabling it to reciprocate back and forth between tapered surface 141a and mounting section 131. The rear end of mounting section 131, together with tapered surface 141a of eccentric tapered hole 141, defines a fixed travel distance for ball 142's reciprocating motion within connecting section cavity 12. In this embodiment, the fixed travel distance is 0.8-1.1 mm. In this embodiment, ball 142 has a diameter of 1.4 mm, and the inner diameter of mounting section cavity 131a is 1.1-1.6 mm.

[0033] Two guide members 143 are spaced apart within the eccentric tapered hole 141, near the mounting section cavity 131a, to guide the ball 142 in reciprocating motion within the connection section cavity 12a within a fixed travel distance. The guide members 143 are guide ribs extending from the tapered surface toward the pen tip. In this embodiment, the inner surface of the guide ribs gradually slopes inward toward the pen tip 13.

[0034] In this embodiment, the working principle of the valve type impact-resistant pen refill 10 is as follows:

[0035] When the gel pen writes downward, the ball 142 disengages from the conical surface 141a of the eccentric conical hole 141 under the action of gravity, and moves freely vertically downward to the lowest end point in the connecting section cavity 12a; in this case, since there is an offset between the center axis of the eccentric conical hole 141 and the center axis of the mounting section cavity 131a, and the inner surface of the guide 143 gradually tilts inward along the direction toward the pen tip 13, the ball 142 abuts against the rear end of the mounting section 131 without blocking the opening of the mounting section cavity 131a at the rear end, so that the mounting section cavity 131a is connected to the oil tube cavity 11a through the eccentric conical hole 141, and the ink 111 in the oil tube cavity 11a flows to the mounting section cavity 131a through the conical eccentric hole 141, and then flows into the pen tip cavity, thereby completing the writing process. During use, since the weight of the ball 142 is greater than the buoyancy of the ink 111, when the ball 142 moves up and down in the ink 111, it can better induce the flow of the ink 111, making the ink more coherent and smooth when writing, and making the pen core write continuously without interruptions.

[0036] When the gel pen is writing upwards or encounters a fall or collision, the ball 142 moves quickly toward the oil tube 11 to the eccentric conical hole 141 under the action of gravity and the guidance of the guide member 143; in this case, the ball 142 cooperates with the conical surface of the eccentric conical hole 141 to block the connecting channel formed by the eccentric conical hole 141 and act as a seal, so that the ink in the pen tip cavity and the mounting section cavity 131a cannot flow back into the oil tube cavity 11a, preventing air from entering the pen core oil tube, preventing the pen core from flowing back and air from entering the pen core, thereby avoiding the occurrence of writing breakage.

[0037] Example Function and Effect

[0038] According to the valve-type impact-resistant pen core involved in this embodiment, since it has an oil pipe, a connecting section and a pen head connected in sequence, the pen head includes a mounting section whose rear end is connected to the connecting section and a pen tip detachably mounted on the front end of the mounting section. An ink through-stop structure is provided in the cavity of the connecting section, which can prevent the ink in the pen tip cavity and the mounting section cavity from flowing back into the oil pipe cavity, thereby solving the problem of broken writing lines when the neutral pen writes with the pen head facing upward, encounters a fall or collision, and makes the writing process more streamlined; moreover, the pen head adopts a split structure consisting of a detachable pen tip and a mounting section. For neutral pens of different specifications, there is no need to equip them with integral pen heads of different specifications, but only with pen tips of different specifications, which reduces the difficulty of the production process and also reduces the manufacturing cost.

[0039] In addition, because the inner side surface of the guide rib gradually tilts inward in the direction toward the pen tip, the degree to which the ball does not block the opening of the mounting section cavity at the rear end is increased, allowing the ink to flow more smoothly into the mounting seat cavity.

[0040] The above-mentioned embodiments are preferred examples of the present invention and are not intended to limit the scope of protection of the present invention.

Claims

1. A valve-type impact-resistant pen refill, characterized in that: include: An oil pipe having a hollow oil pipe cavity for storing ink; A connecting section, the rear end of which is connected to the front end of the oil pipe and has a hollow connecting section cavity; as well as The pen tip is arranged at the front end of the connecting section, The pen head includes a mounting section whose rear end is connected to the connecting section, and a pen tip detachably mounted on the front end of the mounting section. The mounting section and the pen tip have a hollow mounting section cavity and a pen tip cavity respectively. The pen tip cavity, the installation section cavity, the connection section cavity and the oil pipe cavity are sequentially connected. An ink through-stop structure is provided in the connecting section cavity, for preventing the ink in the pen tip cavity and the mounting section cavity from flowing back into the oil pipe cavity.

2. The valve-type impact-resistant pen refill according to claim 1, characterized in that: in, The ink flow-through structure comprises an eccentric tapered hole, a ball and a guide. The eccentric tapered hole is provided in the connecting section cavity and serves as the only communication passage between the mounting section cavity and the oil pipe cavity. The eccentric conical hole has a conical surface facing the pen tip, and the central axis of the eccentric conical hole is offset from the central axis of the mounting section cavity. The ball is movably disposed in the cavity of the connecting section and located between the tapered surface and the mounting section. The ball can cooperate with the tapered surface under the action of gravity to block the communication path to prevent the ink from moving backward, and can disengage from the tapered surface under the action of gravity to allow the ink in the oil tube cavity to flow into the mounting section cavity and the pen tip cavity through the communication path. The guide member is arranged in the eccentric conical hole on one side close to the mounting section cavity, and is used to guide the ball to reciprocate back and forth within a fixed stroke distance in the connecting section cavity.

3. The valve-type impact-resistant pen refill according to claim 2, characterized in that: in, The rear end of the mounting section is inserted into the cavity of the connecting section. The rear end portion of the mounting segment defines the fixed stroke distance together with the tapered surface of the eccentric tapered hole.

4. The valve-type impact-resistant pen refill according to claim 2 or 3, characterized in that: in, The fixed stroke distance is 0.8-1.1 mm.

5. The valve-type impact-resistant pen refill according to claim 2, characterized in that: in, The guide member is a guide rib starting from the tapered surface and extending toward the pen tip.

6. The valve-type impact-resistant pen refill according to claim 5, characterized in that: in, The number of the guide ribs is two, and the two guide ribs are arranged at intervals.

7. The valve-type impact-resistant pen refill according to claim 5 or 6, characterized in that: in, The inner side surface of the guide rib gradually tilts inward along the direction toward the pen tip.

8. The valve-type impact-resistant pen refill according to claim 1, characterized in that: in, The rear end portion of the pen tip is inserted into the cavity of the mounting section.

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