Double-layer structure refill head, refill and ball-point pen

Abstract

The utility model discloses a double-layer structure refill head, a refill and a ball-point pen. The refill head with the double-layer structure comprises a bead seat assembly, the bead seat assembly comprises an installation seat, a metal tube and a soft rubber sleeve, installation insertion holes which are communicated with one another are formed in the installation seat, the metal tube is a hard tube, the soft rubber sleeve is an elastic tube, and a bowl opening is formed in the first end of the metal tube; the soft rubber sleeve is sleeved outside the metal tube; the first end portion of the metal tube is wrapped by the first end portion of the soft rubber sleeve, the first end portion of the soft rubber sleeve surrounds the outer side of the bowl opening, the second end portion of the metal tube and the second end portion of the soft rubber sleeve are inserted into the installation insertion hole, and the first end portion of the metal tube and the first end portion of the soft rubber sleeve are located outside the installation base; and the ball bead is arranged in the bowl opening. The bowl opening protection capability of writing stationery is improved, so that stable writing of the writing tool is ensured, and the use reliability and the user use experience are improved.

Description

Technical Field

[0001] This application relates to the technical field of stationery supplies, and particularly to a double-layer structure pen tip, pen refill, and ballpoint pen. Background Art

[0002] Writing tools are important learning utensils for students. They use writing tools for a long time for study and exams, and various ballpoint pens with good writing experience have become the mainstream writing tools in the market.

[0003] The ballpoint pen has a double-layer ball bead in the ball seat body part processed by stainless steel, and the ink-carrying writing is realized by the rolling of the ball bead. During the use of various ballpoint pens, there are problems in the use of ballpoint pens. If a student accidentally drops the pen tip downwards and bumps the ball seat body during use, it will cause poor writing.

[0004] Chinese Patent Publication No. CN220332320U discloses a bullet tip structure, which relates to the technical field of pen tips. It includes a pen tip body, a cavity for ink circulation is provided on the pen tip body, a steel ball is rotatably installed at the end of the pen tip body, and a protection component is arranged inside. The protection component includes an elastic member and a limiting plate fixed on the inner wall of the pen tip body. A plurality of ink outlet holes are provided on the upper edge of the limiting plate. The elastic member is in a compressed state and its opposite sides are respectively in contact with the steel ball and the limiting plate. A part of the steel ball protrudes from the outer side of the pen tip body, and the steel ball can be squeezed into the pen tip body and further compress the elastic member; through the setting of the protection component, when the bullet pen tip collides with the ground, under the action of the impact force, the steel ball can be squeezed into the pen tip body and further compress the elastic member, so as to avoid the rigid collision of the steel ball with the ground. This solution can achieve buffering by setting a compression elastic member inside the pen tip, but the space inside the pen tip is small, and the effect of buffering is also relatively limited when realizing buffering. When the pen tip body is damaged, it is still impossible to ensure normal writing speed.

[0005] Chinese Patent Publication No. CN216783137U discloses an anti-drop and anti-leak semi-needle type gourd double-bead spring pen tip, including a main body. The main body is rod-shaped and axially penetrates with an inner hole. A first ball bead, a second ball bead, and a spring are arranged in the inner hole in sequence from front to back. An annular partition layer forming a first ball bead rotation cavity is provided at the front end of the inner hole. The annular partition layer is provided with a plum blossom groove. A part of the first ball bead is exposed at the port of the front end of the inner hole. The rear end of the spring is limited in the inner hole. The key lies in that the main body includes a pen tip, a needle tube part, and a bullet head part in sequence from front to back. The diameter of the needle tube part is 1mm to 1.2mm, and the bullet head part includes a rear part with a diameter of 2.2 mm to 2.4mm and a front part whose diameter gradually shrinks to the needle tube part. Although the spring itself can buffer the ball bead body, the elastic buffering is also limited, and the protection for the bowl mouth is insufficient.

[0006] Chinese Patent Publication No. CN220095988U discloses a drop-proof ballpoint pen, which includes an ink tube. The lower surface of the ink tube is fixedly connected with a ball seat body. A ball bead is arranged on the lower surface of the ball seat body. The outer wall of the ink tube is slidably connected with a first hole, and the first hole is opened inside a sponge column. A sliding rod is fixedly connected to the outer wall of the sponge column, and a sliding groove is opened on the inner wall of the pen barrel. A silica gel sleeve is fixedly connected to the outer wall of the pen barrel, and a second hole is opened inside the silica gel pad. In the present utility model, the outer wall of the ink tube fits with the inner wall of the first hole inside the sponge column. The sponge column protects the ink tube to prevent damage caused by dropping. The pen barrel provides a second layer of protection. The silica gel sleeve on the outer wall of the pen barrel protects the whole. The ball seat body and the ball bead are protected inside the second hole in the silica gel pad to prevent damage caused by dropping, so that all-round protection against dropping of the ballpoint pen can be achieved. Although the design of the whole pen structure can protect the product when it drops, a large space has to be used to achieve the function, which greatly increases the cost of the product.

[0007] Therefore, how to design a technology with good elastic buffering function, bowl mouth protection function and stable writing is the technical problem to be solved by this application. Summary of the Invention

[0008] This application provides a double-layer structure pen tip, pen core and ballpoint pen to improve the bowl mouth protection ability of writing utensils, ensure that writing tools can write stably, and thus improve the use reliability and user experience.

[0009] To achieve the above object, this application adopts the following technical solutions:

[0010] This application provides a double-layer structure pen tip, including:

[0011] A ball seat assembly, the ball seat assembly includes a mounting seat, a metal tube and a soft rubber sleeve. There are mutually communicated mounting jacks on the mounting seat. The first end of the metal tube forms a bowl mouth; the soft rubber sleeve is sleeved outside the metal tube; the first end of the soft rubber sleeve wraps the first end of the metal tube and surrounds the outside of the bowl mouth. The second end of the metal tube and the second end of the soft rubber sleeve are inserted into the mounting jack, and the first end of the metal tube and the first end of the soft rubber sleeve are located outside the mounting seat;

[0012] A ball bead, the ball bead is arranged in the bowl mouth;

[0013] Wherein, a guide ink groove is further arranged on the inner tube wall of the metal tube, or an ink guiding core is further arranged in the metal tube.

[0014] In an embodiment of this application, a buffer portion is further arranged on the inner tube wall of the second end of the soft rubber sleeve;

[0015] The end face of the second end of the metal tube abuts against the buffer portion.

[0016] In an embodiment of the present application, the buffer portion has an annular structure; alternatively, the buffer portion includes a plurality of buffer sub-portions, and the plurality of buffer sub-portions are distributed around the center line of the soft rubber sleeve.

[0017] In an embodiment of the present application, the first end of the metal tube is further provided with a plurality of positioning portions, the positioning portions form positioning grooves on the outer wall of the metal tube, and the positioning portions form positioning protrusions on the inner wall of the metal tube;

[0018] The ball also abuts against the positioning protrusion.

[0019] In an embodiment of the present application, the inner wall of the first end of the soft rubber sleeve is further provided with mounting protrusions, and the mounting protrusions are located in the corresponding positioning grooves.

[0020] In an embodiment of the present application, the mounting seat includes a seat body and a mounting head, an assembly insertion hole is formed on the seat body, a mounting insertion hole is formed in the mounting head, and the mounting head is inserted into the assembly insertion hole;

[0021] The second end of the metal tube and the second end of the soft rubber sleeve are inserted into the mounting insertion hole in the mounting head.

[0022] In an embodiment of the present application, an ink guiding core is further included, and the ink guiding core is inserted into the metal tube.

[0023] The present application also provides a pen core, including an ink storage chamber, and further including the above-mentioned double-layer structure pen tip, and the mounting seat of the double-layer structure pen tip is arranged on the ink storage chamber.

[0024] The present application also provides a ballpoint pen, including:

[0025] A pen barrel;

[0026] A pen core, and the pen core adopts the above-mentioned pen core;

[0027] Wherein, the pen core is arranged in the pen barrel.

[0028] The technical solution of the present application has the following technical effects compared with the prior art: By installing a metal tube and a soft rubber sleeve on the mounting base, the metal tube is made of a rigid tube to meet the installation requirements of the ball beads, and a soft rubber sleeve made of an elastic tube is sleeved outside the metal tube. Moreover, the first end of the soft rubber sleeve wraps and protects the first end of the metal tube exposed outside the mounting base. In this way, the bowl-shaped part of the metal tube can be protected by the soft rubber sleeve. During the use by the user, when a drop occurs, the external soft rubber sleeve can protect the first end of the metal tube. Since the soft rubber sleeve is made of an elastic tube, it has a good buffering effect, so as to improve the bowl-shaped protection ability of the writing stationery and ensure that the writing tool can write stably, thereby improving the use reliability and the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic structural view of an embodiment of the pen core of the present application;

[0030] Figure 2 It is a schematic structural view of an embodiment of the double-layer pen tip of the present application;

[0031] Figure 3 It is Figure 2 One of the cross-sectional views of the double-layer pen tip in

[0032] Figure 4 It is Figure 3 The partial enlarged schematic view of area A in

[0033] Figure 5 It is Figure 3 The structural view of the metal tube in

[0034] Figure 6 It is Figure 3 The structural view of the soft rubber sleeve in

[0035] Figure 7 It is Figure 2 The second cross-sectional view of the double-layer pen tip in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0036] As Figures 1 - 7 shown, an embodiment of the present application provides a ballpoint pen, which includes a pen barrel and a pen core 200 arranged in the pen barrel.

[0037] Among them, the pen core 200 includes a pen tip 210 and an ink cartridge 220. Ink is stored in the ink cartridge 220 to supply the pen tip 210 to meet the writing requirements.

[0038] For the nib 210, it plays the role of writing ink onto paper during the writing process. When the writing tool drops during user use, the nib 210 will be damaged due to impact. In order to improve the drop impact resistance of the nib 210 and enhance its usage reliability, the following structural improvements are made to the nib 210.

[0039] The nib 210 includes a ball seat assembly and a ball 214. The ball 214 is installed on the ball seat assembly, and the ball seat assembly is installed on the ink cartridge 220.

[0040] Among them, the ball seat assembly includes a mounting seat 211, a metal tube 212, and a soft rubber sleeve 213. The mounting seat 211 is provided with interconnected mounting sockets. The metal tube 212 is a rigid tube, and the soft rubber sleeve 213 is an elastic tube. The first end of the metal tube 212 forms a bowl mouth 2121; the soft rubber sleeve 213 is sleeved outside the metal tube 212; the first end of the soft rubber sleeve 213 wraps the first end of the metal tube 212 and surrounds the outside of the bowl mouth 2121. The second end of the metal tube 212 and the second end of the soft rubber sleeve 213 are inserted into the mounting socket. The first end of the metal tube 212 and the first end of the soft rubber sleeve 213 are located outside the mounting seat 211; the ball 214 is disposed in the bowl mouth 2121.

[0041] Specifically, the mounting seat 211 in the ball seat assembly is provided with a metal tube 212 and a soft rubber sleeve 213. The metal tube 212 can be a rigid tube (such as a metal tube) to meet the requirement of supporting and mounting the ball 214. The soft rubber sleeve 213 is an elastic tube. The soft rubber sleeve 213 can wrap and protect the first end of the metal tube 212 located outside the mounting seat 211. The first end of the soft rubber sleeve 213 is wrapped outside the first end of the metal tube 212. Moreover, the first end of the soft rubber sleeve 213 surrounds the outside of the bowl mouth 2121 to buffer and protect the bowl mouth 2121 part of the metal tube 212.

[0042] After the mounting seat 211 is connected to the ink cartridge 220, the metal tube 212 will communicate with the ink cartridge 220, so that the ink in the ink cartridge 220 can flow into the metal tube 212 and be printed on the paper through the rolling ball 214.

[0043] When the writing stationery drops from a height during the user's writing process, the first end of the soft rubber sleeve 213 can buffer and protect the outer peripheral part of the first end of the metal tube 212, and thus effectively protect the ball 214 in the bowl mouth 2121, so as to increase the possibility that the ball 214 can roll smoothly in the bowl mouth 2121 after dropping, and further improve the usage reliability of the writing tool.

[0044] Meanwhile, the second end of the soft rubber sleeve 213 is also located in the mounting seat 211. When a drop occurs, the soft rubber sleeve 213 contacts the ground and can undergo elastic deformation, thereby ensuring that both ends of the metal tube 212 can obtain effective buffering, reducing the deformation of the metal tube 212 that may lead to unsmooth ink output, improving the overall protection ability of the metal tube 212, and enhancing the overall reliability of the writing tool during use.

[0045] In one embodiment, a buffer portion 2131 is further provided on the inner tube wall of the second end of the soft rubber sleeve 213;

[0046] The end face of the second end of the metal tube 212 abuts against the buffer portion 2131.

[0047] Specifically, usually, when a writing tool drops, it will fall in an inclined posture. In some cases, when the writing tool drops in a substantially vertical state, the ball bead 214 directly hitting the ground may also cause damage. Therefore, a buffer portion 2131 is formed in the inner tube wall of the second end of the soft rubber sleeve 213, and the buffer portion 2131 supports the end face of the second end of the metal tube 212. In this way, when dropping vertically, after the ball bead 214 contacts the ground, the metal tube 212 can compress the buffer portion 2131 to play a role in buffering the impact, reducing the situation where the ball bead 214 cannot write due to deformation.

[0048] Wherein, the buffer portion 2131 has an annular structure; or, the buffer portion 2131 includes a plurality of buffer sub - portions, and the plurality of buffer sub - portions are distributed around the center line of the soft rubber sleeve 213.

[0049] In another embodiment, a plurality of positioning portions 2122 are further provided at the first end of the metal tube 212. The positioning portions 2122 form positioning grooves on the outer wall of the metal tube 212, and the positioning portions 2122 form positioning protrusions on the inner wall of the metal tube 212;

[0050] The ball bead 214 also abuts against the positioning protrusion.

[0051] Specifically, for the ball bead 214 located in the bowl - shaped opening 2121, within the metal tube 212, it can be further positioned and supported by the positioning portions 2122.

[0052] Furthermore, an installation protrusion 2132 is provided on the inner wall of the first end of the soft rubber sleeve 213, and the installation protrusion 2132 is located in the corresponding positioning groove.

[0053] Specifically, after the metal tube 212 is inserted into the soft rubber sleeve 213, the installation protrusion 2132 will be located in the positioning groove to improve the connection reliability between the metal tube 212 and the soft rubber sleeve 213.

[0054] Moreover, the installation protrusion 2132 is made of the same material as the soft rubber sleeve 213 and also has elasticity. The cooperation between the installation protrusion 2132 and the positioning groove further plays an elastic buffering role on the metal tube 212 to improve the anti-impact ability during dropping.

[0055] In another embodiment, the mounting seat 211 includes a seat body 2111 and a mounting head 2112. An assembly jack is formed on the seat body 2111, and the mounting jack is formed in the mounting head 2112. The mounting head 2112 is inserted into the assembly jack; the second end of the metal tube 212 and the second end of the soft rubber sleeve 213 are inserted into the mounting jack in the mounting head 2112.

[0056] Specifically, for the convenience of assembly, the mounting seat 211 can also adopt a split structure, that is, it includes the seat body 2111 and the mounting head 2112 that are inserted together. The mounting head 2112 can be first assembled with the metal tube 212 and the soft rubber sleeve 213, and then the mounting head 2112 is inserted into the assembly jack provided on the seat body 2111.

[0057] In another embodiment, in order to ensure that the ink in the ink cartridge 220 flows smoothly into the first tube body 212, a ink guiding groove is provided on the inner wall of the first tube body 212 to guide the flow of the ink.

[0058] Or, as Figure 7 shown, an ink guiding core 215 can also be arranged in the core body. The ink guiding core 215 is inserted into the first tube body 212. The ink guiding core 215 can drain the ink in the ink cartridge 220 to the ball bead 214. The installation method of the ink guiding core 215 can refer to the ink guiding structure configured in a conventional pen and will not be limited and described in detail here.

[0059] The above is only the specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any change or replacement that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A double-layer structure pen tip, characterized in that, Comprising: A ball seat assembly, the ball seat assembly includes a mounting seat, a metal tube and a soft rubber sleeve. An installation jack which is interconnected is provided on the mounting seat. A first end of the metal tube forms a bowl mouth; the soft rubber sleeve is sleeved outside the metal tube; a first end of the soft rubber sleeve wraps the first end of the metal tube and surrounds the outside of the bowl mouth. A second end of the metal tube and a second end of the soft rubber sleeve are inserted into the installation jack, and the first end of the metal tube and the first end of the soft rubber sleeve are located outside the mounting seat; A ball bead, the ball bead is arranged in the bowl mouth; Wherein, an ink guiding groove is further provided on the inner pipe wall of the metal tube, or an ink guiding core is further provided in the metal tube.

2. The double-layer structure pen tip according to claim 1, wherein, A buffer portion is further provided on the inner pipe wall of the second end of the soft rubber sleeve; An end face of the second end of the metal tube abuts against the buffer portion.

3. The double-layer structure pen tip according to claim 2, characterized in that, The buffer portion is in an annular structure; or the buffer portion includes a plurality of buffer sub-portions, and the plurality of buffer sub-portions are distributed around the center line of the soft rubber sleeve.

4. The double-layer structure pen tip according to claim 1, characterized in that, A plurality of positioning portions are further provided at the first end of the metal tube. The positioning portions form positioning grooves on the outer wall of the metal tube and form positioning protrusions on the inner wall of the metal tube; The ball bead also abuts against the inner wall of the positioning protrusion.

5. The double-layer structure pen tip according to claim 4, wherein, An installation protrusion is further provided on the inner wall of the first end of the soft rubber sleeve, and the installation protrusion is located in the corresponding positioning groove.

6. The double-layer structure pen tip according to claim 1, characterized in that, The mounting seat includes a seat body and a mounting head. An assembly jack is formed on the seat body, the installation jack is formed in the mounting head, and the mounting head is inserted into the assembly jack; The second end of the metal tube and the second end of the soft rubber sleeve are inserted into the installation jack in the mounting head.

7. A refill, comprising an ink reservoir, characterized in that, It further includes a double-layer structure pen tip as described in any one of claims 1-6, and the mounting seat of the double-layer structure pen tip is arranged on the ink cartridge.

8. A ballpoint pen, characterized in that, Comprising: A pen barrel; A pen core, the pen core adopts the pen core as described in claim 7; Wherein, the pen core is arranged in the pen barrel.

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