Ink guiding sheath

Abstract

The ink guiding sheath is applied to ink guiding of a ball type refill and comprises a flow guiding part, an elastic piece and an embedding part, the flow guiding part is integrally a hollow cylinder, the elastic piece and the embedding part are arranged in a cavity of the flow guiding part, one end of the elastic piece abuts against the inner wall of the flow guiding part, and the other end of the elastic piece abuts against the embedding part. The embedding part can abut against the pen point of the pen refill to overcome the elastic force of the elastic piece to move axially, and the pen point is communicated with the atmosphere. The elastic piece is adjustable and has a complete air return channel design, the flow guide part is provided with a bottom air hole and a side edge air hole, the embedding part is provided with an air guide hole and a vent groove, the pen core is communicated with the atmosphere in the ink guiding process, meanwhile, the smooth and high-strength pressure bearing table is arranged, the ink guiding protective sleeve is not prone to deformation and loss and can be repeatedly used, and the cost is reduced. And continuous ink guiding can be prevented, and pollution is reduced.

Description

Technical Field

[0001] This patent relates to the field of pen core processing technology, and in particular to an ink guide sheath. Background Art

[0002] The newly emerged water-based ballpoint pens that have emerged in recent years have the advantages of low viscosity, smooth writing, and good continuous writing performance of traditional water-based ballpoint pens, and are more novel in that they are flexible in changing the core, easy to use, and have a long intermittent writing time. Due to the structural design requirements of the water-based ballpoint pens that have been pushed, the mouth of the pen head is in a sealed state when not writing. While ensuring good intermittent writing performance, the air return volume is small in this state. After the ink is filled in the pen core, the ink drawing time is extremely long or the ink cannot be drawn at all, and an additional ink drawing process is required, which greatly reduces the production efficiency of the product.

[0003] Traditional fixed water-based ballpoint pens draw ink by the capillary force of the water-drawing core. The new push-type water-based ballpoint pen has an embedded spring and a tightly sealed bowl. The air pressure generated by the closure causes a serious lack of ink return in the pen, which makes it impossible to draw ink smoothly, and the pen core cannot be written after production. At the same time, due to the low viscosity of the ink and high anti-leakage requirements, it is impossible to draw ink by centrifugation, shaking, etc. In order to solve the problem of ink drawing difficulties, the current common solution is to add a manual ink drawing process, that is, after the pen core is assembled and stabilized for a period of time, the pen core is manually pressed to open the bowl of the pen head, so that the ink contacts the atmosphere, thereby completing the ink drawing. This process requires drawing ink one by one, and the average time required for each pen to draw ink is 1-2 minutes, which greatly reduces production efficiency and increases production costs. Therefore, it is necessary to develop an ink drawing sheath that can write normally without manual ink drawing after production and filling. Utility Model Content

[0004] In order to shorten the ink-introduction time of ball-type pen cores, improve production efficiency and reduce production costs, this patent provides the following technical solutions:

[0005] The first aspect: provides an ink-drawing sheath, which is used for drawing ink from a ballpoint pen core, and comprises a flow-guiding portion, an elastic member and a fitting portion. The flow-guiding portion is a hollow cylinder as a whole, and the elastic member and the fitting portion are arranged in a cavity of the flow-guiding portion. One end of the elastic member abuts against the inner wall of the flow-guiding portion, and the other end abuts against the fitting portion. The fitting portion can abut against the tip of the pen core to overcome the elastic force of the elastic member and perform axial movement, so that the tip of the pen is connected to the atmosphere.

[0006] Furthermore, the engaging portion includes an air guiding section, and the elastic member is sleeved on the air guiding section.

[0007] Furthermore, the engaging portion also includes a platform section, a pressure-bearing platform and a ventilation groove, and the pressure-bearing platform is a smooth, high-strength pressure-bearing structure.

[0008] Furthermore, an air guide hole penetrating the air guide section and the platform section is provided in the center of the air guide section, one end of the platform section is connected to the air guide section and the other end is connected to the pressure platform, and the ventilation groove is provided around the pressure platform and connected to the air guide section, so that the ventilation groove and the air guide section remain connected to the atmosphere.

[0009] Furthermore, the number of ventilation slots is 2 to 6.

[0010] Furthermore, the cavity of the guide part includes a first cavity, a second cavity, a third cavity and a fourth cavity with gradually increasing inner diameters; the shapes of the first cavity, the second cavity, the third cavity and the fourth cavity are one or more of a straight cylinder, an hourglass, a truncated cone and an ellipse.

[0011] Furthermore, the guide portion is provided with side air holes at the third cavity, and the number of the side air holes is 1 to 6.

[0012] Furthermore, the guide part is made of plastic, and the plastic is one of polyethylene, polypropylene, polymethyl methacrylate or polycarbonate.

[0013] Furthermore, the engaging part is selected from one of metal, alloy and / or polymer, and the polymer includes ABS engineering plastic.

[0014] Furthermore, the elastic member is selected from one of metal, alloy and / or polymer.

[0015] This patent has the following beneficial effects:

[0016] 1. The elastic part can adjust the elastic force. Through the design of spring length, wire diameter and outer diameter, combined with the ink-leading piston, the appropriate elastic force can be ensured. When the sheath is tightened, the ball can be retracted, and the bowl mouth can be opened to ensure air return. At the same time, the elastic force will not be too large to push back the pen core.

[0017] 2. The ink-introducing sheath has a complete air return path design. The guide part is provided with bottom air holes and side air holes, and the fitting part is provided with air guide holes and ventilation grooves, so that the pen core can be connected with the atmosphere during the ink-introducing process, ensuring the air return effect of the pen core;

[0018] 3. The high-strength pressure-bearing platform is not easy to deform and wear out, can be used repeatedly, and the pressure-bearing platform is smooth, which can prevent continuous ink introduction and reduce pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the embodiment of this patent, the following is a brief introduction to the drawings required for use in the embodiment. It should be understood that the following drawings only show certain embodiments of this patent and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a front view of the ink guide sleeve assembly completed in the first embodiment of the present patent;

[0021] Figure 2 This is a cross-sectional view of the ink guide sleeve assembly completed in the first embodiment of this patent;

[0022] Figure 3 This is a front view of the guide portion of the first embodiment of the present patent;

[0023] Figure 4 This is a cross-sectional view of the guide portion of the first embodiment of this patent;

[0024] Figure 5 This is a front view of the elastic member of the first embodiment of the present patent;

[0025] Figure 6 This is a cross-sectional schematic diagram of the interlocking portion of the first embodiment of the present patent;

[0026] Figure 7 This is a top view of the interlocking portion of the first embodiment of the present patent;

[0027] Figure 8 This is a schematic diagram of the assembly process of the first embodiment of this patent;

[0028] Fig. 9 This is an exploded view of the components of the first embodiment of this patent;

[0029] Fig.10 This is a cross-sectional view of the ink-introducing sheath in the ink-introducing state according to the first embodiment of the present patent;

[0030] Fig.11 This is a cross-sectional view of the ink guide sleeve in the reset state according to the first embodiment of the present patent;

[0031] Fig.12 This is a cross-sectional view of the first embodiment of the present patent, in which the pen core is in the ink-drawing state;

[0032] Fig.13 This is a cross-sectional view of the first embodiment of the present patent, in which the refill is in a reset state;

[0033] Fig.14 This is a cross-sectional view of the ink guide sleeve assembly completed in the second embodiment of this patent;

[0034] Fig.15 This is a cross-sectional view of the guide portion of the second embodiment of this patent;

[0035] Fig.16 This is a front view of the elastic member of the second embodiment of the present patent;

[0036] Fig.17 This is a cross-sectional schematic diagram of the interlocking portion of the second embodiment of the present patent;

[0037] Fig.18 This is a top view of the interlocking portion of the second embodiment of the present patent;

[0038] Fig.19 This is a cross-sectional view of the ink-introducing sheath in the ink-introducing state according to the second embodiment of the present patent;

[0039] Fig. 20 This is a cross-sectional view of the ink guide sleeve in the reset state according to the second embodiment of the present patent;

[0040] Fig.21 This is a cross-sectional view of the pen core of the second embodiment of this patent in the ink-drawing state.

[0041] The reference numerals are described as follows:

[0042] Ink sheath: 100, 200

[0043] Guide part: 110, 210

[0044] Bottom air holes: 111, 211

[0045] Side vents: 112, 113, 212, 213

[0046] First cavity: 114, 214

[0047] Second cavity: 115, 215

[0048] Third cavity: 116, 216

[0049] Fourth cavity: 117, 217

[0050] Elastic parts: 120, 220

[0051] Chimeric part: 130, 230

[0052] Air holes: 131, 231

[0053] Air guide section: 132, 232

[0054] Platform section: 133, 233

[0055] Pressure platform: 134, 234

[0056] Ventilation slots: 135, 136, 137, 138, 235, 236

[0057] Refill: 300

[0058] Pen tip: 310

[0059] Bowl size: 311

[0060] First ball: 312

[0061] Second ball: 313

[0062] Refill body: 320 DETAILED DESCRIPTION

[0063] The detailed features and advantages of this patent are described in detail in the specific implementation method below, and the content is sufficient to enable any technical personnel in this field to understand the technical content of this patent and implement it accordingly. According to the description, claims and drawings disclosed in this specification, technical personnel in this field can easily understand the relevant purposes and advantages of this patent.

[0064] In order to make the purpose, technical solutions and advantages of this patent clearer, the implementation method of this patent will be further described in detail below in conjunction with the accompanying drawings.

[0065] Example 1

[0066] like Figure 1 , Figure 2 As shown, this embodiment provides an ink-introducing sheath 100 for producing a pen core 300, including a flow guide 110, an elastic member 120 and a fitting portion 130, and also provides a pen core 300 adapted to the ink-introducing sheath 100 of this embodiment, the pen core 300 including a pen tip 310, a bowl 311, a first ball 312, a second ball 313 and a pen core body 320. The flow guide 110 is a long cylindrical hollow structure, which can sequentially accommodate the elastic member 120, the fitting portion 130 and the pen tip 310. One end of the elastic member 120 abuts against the flow guide 110, while the other end is sleeved on the fitting portion 130 and can drive the fitting portion 130 to move along the axial direction of the ink-introducing sheath 100.

[0067] like Figure 3 , Figure 4As shown, in this embodiment, the guide part 110 is made of polypropylene (PP) material by injection molding, and includes a bottom pore 111, side pores 112, 113, a first cavity 114, a second cavity 115, a third cavity 116 and a fourth cavity 117. The outer wall of the guide part 110 is a long cylindrical structure, and the outer end face is provided at the front end of the outer wall. The center of the outer end face has a bottom pore 111 with a diameter smaller than the diameter of the first cavity 114. In this embodiment, the diameter of the bottom pore 111 is 2.5 mm. The outer wall of the guide part 110 has side pores 112, 113 that can communicate with the inner wall of the guide part 110. In this embodiment, two 2.0 mm side pores 112, 113 are provided on the outer wall of the guide part 110 located in the third cavity 116. The inner wall of the guide portion 110 includes a continuous first cavity 114, a second cavity 115, a third cavity 116 and a fourth cavity 117. The first cavity 114, the second cavity 115, the third cavity 116 and the fourth cavity 117 are connected cavities with gradually increasing inner diameters. In this embodiment, the first cavity 114 and the third cavity 116 are truncated cone-shaped, and the second cavity 115 and the fourth cavity 117 are hourglass-shaped. Specifically, the first cavity 114 is a truncated cone shape with a gradually increasing diameter, and its diameter increases from 4.1mm to 4.4mm; the second cavity 115 is an hourglass shape with large diameters on both sides and a small central diameter, and its maximum diameter is 4.4mm and its central diameter is 4.1mm; the third cavity 116 is a truncated cone shape with a gradually increasing diameter, and its diameter increases from 4.4mm to 4.8mm; the fourth cavity 117 is an hourglass shape with large diameters on both sides and a small central diameter, and its maximum diameter is 4.8mm and its central diameter is 4.6mm.

[0068] The elastic member 120 and the fitting portion 130 can be displaced in the first cavity 114 and the second cavity 115 along the axial direction of the ink guide sleeve 100. Specifically, the elastic member is located in the first cavity 114 and the second cavity 115 when stretched, and is completely located in the first cavity 114 when compressed; the fitting portion 130 can be displaced back and forth from the connection between the third cavity 116 and the second cavity 115 to the connection between the second cavity 115 and the first cavity 114. The diameter of the elastic member in this embodiment is larger than the diameter of the bottom air hole 111 and smaller than the minimum diameter of the first cavity 114, and is almost equal to the maximum diameter of the air guide section 132, so that the elastic member can enter the air guide section 110 and press against the inner side of the outer end surface without jumping out of the bottom air hole 111, and at the same time, the other end of the elastic member is firmly sleeved on the air guide section 132.

[0069] like Figure 5 As shown, in this embodiment, the elastomer is made of 304 stainless steel and processed into a spring structure. The specific parameters of the elastic member 120 are: the free length of the elastic member 120 is 11.5 mm, the wire diameter of the elastic member 120 is 0.25 mm, the outer diameter of the elastic member 120 is 3.7 mm, the inner diameter of the elastic member 120 is 3.2 mm, and the designed elastic force value is 30-150 gf.

[0070] like Figure 6 , Figure 7 As shown, in this embodiment, the fitting part 130 is made of ABS material by injection molding, and includes an air guide section 132, an air guide hole 131, a platform section 133, a pressure platform 134, and ventilation grooves 135, 136, 137, and 138. The air guide section 132 is a truncated cone structure, and the center thereof is provided with an air guide hole 131 that passes through the air guide section 132 and the platform section 133. The shape of the air guide hole 131 is an opposite truncated cone structure, that is, the smallest diameter of the air guide section 132 is the largest diameter of the air guide hole 131, and the largest diameter of the air guide section 132 is the smallest diameter of the air guide hole 131. In this embodiment, the maximum diameter of the air guide section 132 is 3.2 mm. One end of the platform section 133 is connected to the air guide section 132 and the other end is connected to the pressure platform 134. Ventilation grooves 135, 136, 137, and 138 are arranged around the pressure platform 134 and connected to the air guide section 132. In this embodiment, the maximum diameter of the platform section 133 is 4.25 mm, and the number of venting grooves 135, 136, 137, and 138 is 4 and symmetrically distributed around the pressure platform 134. In this embodiment, the pressure platform 134 is a smooth pressure-bearing structure, which means that the surface roughness of the pressure platform 134 is relatively small.

[0071] like Figure 8 , Fig. 9As shown, the assembly process of the ink introduction sheath 100 of this embodiment for introducing ink to the pen core 300 during the production process of the pen core 300 is shown. The outer end surface of the guide part 110 is placed at the bottom, and the cavity structure of the inner wall of the guide part 110 opens upward. One end of the elastic member 120 is clamped with the maximum diameter of the air guide section 132, and the other end of the elastic member 120 is downwardly and successively entered into the fourth cavity 117, the third cavity 116, the second cavity 115 and the first cavity 114 with the completed fitting part 130, so that the end of the elastic member 120 that is not connected to the fitting part 130 enters the first cavity 114 and smoothly presses against the inner side of the outer end surface without sliding. At this time, the fitting part 130 is in the second cavity 115, the air guide section 132 opens downward, and the ventilation grooves 135, 136, 137, 138 open upward, and the ink introduction sheath 100 is assembled. The pen tip 310 of the pen core 300 faces downward and enters the fourth cavity 117 and the third cavity 116 in sequence along the axial direction of the ink introduction sheath 100. When the pen tip 310 reaches the connection between the third cavity 116 and the second cavity 115, it just contacts the pressure platform 134. The pen core 300 continues to exert downward thrust, so that the pen tip 310 and the pressure platform 134 squeeze each other and move downward synchronously. At this time, the elastic member 120 changes from extension to compression until the platform section 133 reaches and is fixed to the connection between the second cavity 115 and the first cavity 114 and stops moving. The first ball 312 inside the pen tip 310 subjected to the interaction force squeezes the second ball 313 so that the second ball 313 is in a retracted state. At this time, the bowl mouth 311 is opened, and the pen core body 320 is connected to the ventilation grooves 135, 136, 137, 138, the air guide section 132, and the bottom air hole 111. At this time, the ink introduction assembly of the pen core 300 is completed. The ink drawing process of the pen core 300 can be accelerated by placing the pen tip 310 downward and approximately 70-90 degrees to the horizontal plane to draw ink. After the pen core 300 is tightly put on the ink drawing sheath 100, the pen tip 310 is locked by the fitting part 130 located at the connection between the second cavity 115 and the first cavity 114, and the locking force is designed to be greater than 300gf, which is greater than the elastic force of the elastic member 120 in the sheath.

[0072] like Figure 10-11 As shown in FIG. 1 , it is a schematic structural diagram of the ink introduction sheath 100 in the ink introduction state and the reset state in this embodiment; Figure 12-13The figure is a schematic diagram of the structure of the pen tip 310 in the present embodiment in the ink introduction state and the reset state. Under the thrust of the pen tip 310, the ink introduction sheath 100 has the ink introduction state and the reset state; the pen tip 310 enters the fourth cavity 117 and the third cavity 116 in sequence along the axial direction of the ink introduction sheath 100 and reaches the connection between the third cavity 116 and the second cavity 115. At this time, the first ball 312 and the pressure platform 134 contact each other. When the pen tip 310 continues to move forward along the axial direction of the ink introduction sheath 100, until the platform section 133 reaches and is fixed to the connection between the second cavity 115 and the first cavity 114 and stops moving, the first ball 312 and the pressure platform 134 are in contact with each other. The pressure platforms 134 are pressed against each other, and the pressing force exerted on the pressure platforms 134 causes the engaging portion 130 to be displaced forward along the axial direction of the ink-introducing sheath 100 until the platform section 133 is locked at the connection between the second cavity 115 and the first cavity 114. At this time, the elastic member 120 changes from an extended state to a compressed state, and the pressing force exerted on the first ball 312 causes the second ball 313 to be displaced backward along the axial direction of the ink-introducing sheath 100. At this time, there is a gap between the bowl mouth 311 and the second ball 313 that can pass ink, and the ink-introducing sheath 100 enters an ink-introducing state from a reset state.

[0073] Example 2

[0074] like Fig.14 As shown, this embodiment provides an ink-introducing sheath 200 for producing a pen core 300, including a flow guide 210, an elastic member 220 and a fitting portion 230. A pen core 300 adapted to the ink-introducing sheath 200 in this embodiment is also provided, and the pen core 300 includes a pen tip 310, a bowl 311, a first ball 312, a second ball 313 and a pen core body 320. The flow guide 210 is a long cylindrical hollow structure, which can sequentially accommodate the elastic member 220, the fitting portion 230 and the pen core 310. One end of the elastic member 220 abuts against the flow guide 210, while the other end is sleeved on the fitting portion 230 and can drive the fitting portion 230 to move along the axial direction of the ink-introducing sheath 200.

[0075] like Fig.15As shown, in this embodiment, the guide part 210 is made of acrylic (PMMA) material by injection molding, and includes a bottom pore 211, side pores 212, 213, a first cavity 214, a second cavity 215, a third cavity 216 and a fourth cavity 217. The outer wall of the guide part 210 is a long cylindrical structure, and the outer end face is provided at the front end of the outer wall. The center of the outer end face has a bottom pore 211 with a diameter smaller than the diameter of the first cavity 214. In this embodiment, the diameter of the bottom pore 211 is 2.7mm. The outer wall of the guide part 210 has side pores 212, 213 that can communicate with the inner wall of the guide part 210. In this embodiment, two 2.2mm side pores 212, 213 are provided on the outer wall of the guide part 210 located in the third cavity 216. The inner wall of the guide portion 210 includes a continuous first cavity 214, a second cavity 215, a third cavity 216 and a fourth cavity 217. The first cavity 214, the second cavity 215, the third cavity 216 and the fourth cavity 217 are connected cavities with gradually increasing inner diameters. In this embodiment, the first cavity 214 and the third cavity 216 are truncated cone-shaped, and the second cavity 215 and the fourth cavity 217 are hourglass-shaped. Specifically, the first cavity 214 is a truncated cone shape with a gradually increasing diameter, and its diameter increases from 4.15mm to 4.45mm; the second cavity 215 is an hourglass shape with large diameters on both sides and a small center diameter, and its maximum diameter is 4.45mm and its center diameter is 4.15mm; the third cavity 216 is a truncated cone shape with a gradually increasing diameter, and its diameter increases from 4.45mm to 4.85mm; the fourth cavity 217 is an hourglass shape with large diameters on both sides and a small center diameter, and its maximum diameter is 4.85mm and its center diameter is 4.65mm.

[0076] The elastic member 220 and the interlocking portion 230 can be displaced in the first cavity 214 and the second cavity 215 along the axial direction of the ink guide sheath 200. Specifically, the elastic member is located in the first cavity 214 and the second cavity 215 when stretched, and is located in the first cavity 214 when compressed; the interlocking portion 230 can be displaced back and forth from the connection between the third cavity 216 and the second cavity 215 to the connection between the second cavity 215 and the first cavity 214. The diameter of the elastic member in this embodiment is larger than the diameter of the bottom air hole 211 and smaller than the minimum diameter of the first cavity 214, and is almost equal to the maximum diameter of the air guide section 232, so that the elastic member can enter the guide section 210 and press against the inner side of the outer end surface without jumping out of the bottom air hole 211, and at the same time, the other end of the elastic member is firmly sleeved on the air guide section 232.

[0077] like Fig.16As shown, in this embodiment, the elastomer is made of 304 stainless steel and processed into a spring structure. The specific parameters of the elastic member 220 are: the free length of the elastic member 220 is 11.5 mm, the wire diameter of the elastic member 220 is 0.3 mm, the outer diameter of the elastic member 220 is 3.8 mm, the inner diameter of the elastic member 220 is 3.2 mm, and the designed elastic force value is 50-120 gf.

[0078] like Fig.17 , Fig.18 As shown, the fitting part 230 in this embodiment is made of ABS material by injection molding, and includes an air guide section 232, an air guide hole 231, a platform section 233, a pressure platform 234, and ventilation grooves 235 and 236. The air guide section 232 is a truncated cone structure, and the center thereof is provided with an air guide hole 231 that passes through the air guide section 232 and the platform section 233. The shape of the air guide hole 231 is an opposite truncated cone structure, that is, the smallest diameter of the air guide section 232 is the largest diameter of the air guide hole 231, and the largest diameter of the air guide section 232 is the smallest diameter of the air guide hole 231. In this embodiment, the maximum diameter of the air guide section 232 is 3.2 mm. One end of the platform section 233 is connected to the air guide section 232 and the other end is connected to the pressure platform 234. The ventilation grooves 235 and 236 are arranged around the pressure platform 234 and connected to the air guide section 232. In this embodiment, the maximum diameter of the platform section 233 is 4.3 mm. The number of ventilation grooves 235 and 236 is 2 and symmetrically distributed around the pressure platform 234. In this embodiment, the pressure platform 234 is a smooth pressure-bearing structure, which means that the surface roughness of the pressure platform 234 is relatively small.

[0079] The assembly process of the ink introduction sheath 200 of the present embodiment for introducing ink to the refill 300 during the production process of the refill 300 is as follows: the outer end surface of the guide portion 210 is placed at the bottom, the cavity structure of the inner wall of the guide portion 210 opens upward, one end of the elastic member 220 is clamped with the maximum diameter of the air guide section 232, and the other end of the elastic member 220 is downwardly directed to enter the fourth cavity 217, the third cavity 216, the second cavity 215 and the first cavity 214 in sequence with the sleeved fitting portion 230, so that the end of the elastic member 220 that is not connected to the fitting portion 230 enters the first cavity 214 and smoothly presses against the inner side of the outer end surface without sliding. At this time, the fitting portion 230 is in the second cavity 215, the air guide section 232 opens downward, and the ventilation grooves 235 and 236 open upward, and the assembly of the ink introduction sheath 200 is completed. The pen tip 310 of the pen core 300 faces downward and enters the fourth cavity 217 and the third cavity 216 in sequence along the axial direction of the ink introduction sheath 200. When the pen tip 310 reaches the connection between the third cavity 216 and the second cavity 215, it just contacts the pressure platform 234. The pen core 300 continues to exert downward thrust, so that the pen tip 310 and the pressure platform 234 squeeze each other and move downward synchronously. At this time, the elastic member 220 changes from extension to compression until the platform section 233 reaches and is fixed to the connection between the second cavity 215 and the first cavity 214 and stops moving. The first ball 312 inside the pen tip 310 subjected to the interaction force squeezes the second ball 313 so that the second ball 313 is in a retracted state. At this time, the bowl mouth 311 is opened, and the pen core body 320 is connected to the ventilation grooves 235, 236, the air guide section 232, and the bottom air hole 211. At this time, the ink introduction assembly of the pen core 300 is completed. The ink drawing process of the pen core 300 can be accelerated by placing the pen tip 310 downward and approximately 70-90 degrees to the horizontal plane to draw ink. After the pen core 300 is tightly put on the ink drawing sheath 200, the pen tip 310 is locked by the fitting part 230 located at the connection between the second cavity 215 and the first cavity 214, and the locking force is designed to be greater than 300gf, which is greater than the elastic force of the elastic member 220 in the sheath.

[0080] like Figure 19-20 As shown in FIG. 1 , it is a schematic structural diagram of the ink introduction sheath 200 in the ink introduction state and the reset state in this embodiment; Fig.21The figure is a schematic diagram of the structure of the pen tip 310 in the present embodiment in the ink introduction state and the reset state. Under the thrust of the pen tip 310, the ink introduction sheath 200 has the ink introduction state and the reset state; the pen tip 310 enters the fourth cavity 217 and the third cavity 216 in sequence along the axial direction of the ink introduction sheath 200 and reaches the connection between the third cavity 216 and the second cavity 215. At this time, the first ball 312 and the pressure platform 234 contact each other. When the pen tip 310 continues to move forward along the axial direction of the ink introduction sheath 200, until the platform section 233 reaches and is fixed to the connection between the second cavity 215 and the first cavity 214 and stops moving, the first ball 312 and the pressure platform 234 are in contact with each other. The pressure platforms 234 are pressed against each other, and the pressing force exerted on the pressure platforms 234 causes the engaging portion 230 to be displaced forward along the axial direction of the ink-introducing sheath 200 until the platform segment 233 is locked at the connection between the second cavity 215 and the first cavity 214. At this time, the elastic member 220 changes from an extended state to a compressed state, and the pressing force exerted on the first ball 312 causes the second ball 313 to be displaced backward along the axial direction of the ink-introducing sheath 200. At this time, there is a gap between the bowl mouth 311 and the second ball 313 through which ink can pass, and the ink-introducing sheath 200 enters an ink-introducing state from a reset state.

[0081] Experimental Example 1

[0082] The ink introduction sheath 100 of Example 1 was selected to match the push-type straight liquid water-based ballpoint pen core (ink dye black A), and the following results were obtained:

[0083] Direct liquid water-based ballpoint pen ink dye black A, viscosity 3.59mPa·s (30r), surface tension 38.5mN / m, pH value 7.92; test conditions: German HUTT writing instrument, writing angle 70°, writing speed 4.5m / min, writing pressure 1N;

[0084] The trial production ink-drawing effect is: the ink-drawing rate is 90% within 5 minutes, the normal writing ratio after 24 hours is 100%, and the extra working hours required to produce 10,000 pieces is less than 1 hour (the extra working hours required for manual ink-drawing is greater than 8 hours). There is no additional equipment cost (the original production equipment is equipped with an automatic sheath wearing and removing fixture), and the ink-drawing sheath 100 is reusable, without significantly increasing the material cost.

[0085] The test results of writing performance and application performance are as follows: the average ink output of the refill with 1.2g ink is 109mg / m, the length of the line is more than 1000m, the writing traces are normal, there is no ink accumulation on the pen tip and the traces, and the writing performance meets the standard requirements of water-based ballpoint pens. In other application performance tests, there are no abnormalities in the static hanging drop ink accumulation test and the leakage resistance test, the intermittent writing performance is greater than 90 days, and other general application performance meets the standard requirements of water-based ballpoint pens.

[0086] From the trial production and test results of the matching push-type straight liquid water-based ballpoint pen refill (water-based dye ink A black), it can be seen that the ink-drawing sheath 100 provided in Example 1 is used for a push-type water-based ballpoint pen, and has the advantages of a high one-time ink-drawing rate, a fast ink-drawing time, and saving manual operation work; the refill using this ink-drawing sheath 100 to draw ink is more fully ink-drawn, the water-drawing core is basically soaked, and the writing performance and various application performances can meet the standard requirements, which has a great advantage over the existing manual ink-drawing.

[0087] Experimental Example 2

[0088] The ink introduction sheath 200 of Example 2 was selected to match the push-type straight liquid water-based ballpoint pen core (ink pigment black B), and the following results were obtained:

[0089] Direct liquid water-based ballpoint pen ink pigment black B, viscosity 2.98mPa·s (30r), surface tension 40.2mN / m, pH value 7.65; test conditions: German HUTT writing instrument, writing angle 70°, writing speed 4.5m / min, writing pressure 1N;

[0090] The trial production ink-drawing effect is: the ink-drawing rate is 85% within 5 minutes, the normal writing ratio after 24 hours is 100%, and the extra working hours required to produce 10,000 pieces is less than 1 hour (the extra working hours required for manual inking is greater than 12 hours). There is no additional equipment cost (the original production equipment is equipped with an automatic sheath wearing and removing fixture), and the ink-drawing sheath 200 is reusable, without significantly increasing the material cost.

[0091] The test results of writing performance and application performance are as follows: the average ink output of the refill with 1.2g ink is 102mg / m, the length of the line is more than 1100m, the writing traces are normal, there is no ink accumulation on the pen tip and the traces, and the writing performance meets the standard requirements of water-based ballpoint pens. In other application performance tests, there are no abnormalities in the static hanging drop ink accumulation test and the leakage resistance test, the intermittent writing performance is greater than 90 days, and other general application performance meets the standard requirements of water-based ballpoint pens.

[0092] From the trial production and test results of the matching push-type straight liquid water-based ballpoint pen refill (water-based pigment ink B black), it can be seen that the ink-drawing sheath 200 provided in Example 2 is used for a push-type water-based ballpoint pen, and has the advantages of a high one-time ink-drawing rate, a fast ink-drawing time, and saving manual operation work; the refill using this ink-drawing sheath 200 to draw ink is more fully ink-drawn, the water-drawing core is basically fully soaked, and the writing performance and various application performances can meet the standard requirements, which has a great advantage over the existing manual ink-drawing.

[0093] In the specification of this patent, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and components of this patent, but these terms are used here only for the purpose of convenience of description and are determined based on the example orientations shown in the drawings. Since the embodiments disclosed in this patent can be set in different directions, these terms indicating directions are only for illustration and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0094] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this patent will not further describe various possible combinations.

[0095] In addition, the various implementation methods of this patent can be combined arbitrarily, as long as they do not violate the concept of this patent, they should also be regarded as the contents disclosed by this patent.

Claims

1. An ink-introducing sleeve, used for ink-introducing of a ballpoint pen core (300), characterized in that: The invention comprises a flow guide part (110, 210), an elastic member (120, 220) and a fitting part (130, 230); the flow guide part (110, 210) is a hollow cylinder as a whole; the elastic member (120, 220) and the fitting part (130, 230) are arranged in the cavity of the flow guide part (110, 210); one end of the elastic member (120, 220) abuts against the inner wall of the flow guide part (110, 210), and the other end abuts against the fitting part (130, 230); the fitting part (130, 230) can abut against the tip of the pen core (300) to overcome the elastic force of the elastic member (120, 220) and move axially, so that the tip (310) is connected to the atmosphere.

2. The ink introduction sheath according to claim 1, characterized in that: The engaging portion (130, 230) comprises an air guiding section (132, 232), and the elastic member (120, 220) is sleeved on the air guiding section (132, 232).

3. The ink introduction sheath according to claim 2, characterized in that: The engaging portion (130, 230) further comprises a platform section (133, 233), a pressure-bearing platform (134, 234) and ventilation grooves (135, 136, 137, 138, 235, 236), and the pressure-bearing platform (134, 234) is a smooth, high-strength pressure-bearing structure.

4. The ink introduction sheath according to claim 3, characterized in that: An air guide hole (131, 231) penetrating the air guide section (132, 232) and the platform section (133, 233) is provided at the center of the air guide section (132, 232); one end of the platform section (133, 233) is connected to the air guide section (132, 232) and the other end is connected to the pressure bearing platform (134, 234); the ventilation groove (135, 136, 137, 138, 235, 236) is provided around the pressure bearing platform (134, 234) and is connected to the air guide section (132, 232), so that the ventilation groove (135, 136, 137, 138, 235, 236) and the air guide section (132, 232) remain connected to the atmosphere.

5. The ink introduction sheath according to claim 4, characterized in that: The number of the ventilation grooves (135, 136, 137, 138, 235, 236) is 2 to 6.

6. The ink introduction sheath according to claim 1, characterized in that: The cavity of the guide part (110, 210) comprises a first cavity (114, 214), a second cavity (115, 215), a third cavity (116, 216) and a fourth cavity (117, 217) with gradually increasing inner diameters; The shapes of the first cavity (114, 214), the second cavity (115, 215), the third cavity (116, 216) and the fourth cavity (117, 217) are one or more of a straight cylinder, an hourglass, a truncated cone and an ellipse.

7. The ink introduction sheath according to claim 6, characterized in that: The guide portion (110, 210) is provided with side air holes (112, 113, 212, 213) at the third cavity (116, 216), and the number of the side air holes (112, 113, 212, 213) is 1 to 6.

8. The ink introduction sheath according to claim 1, characterized in that: The guide part (110, 210) is made of plastic material, and the plastic is one of polyethylene, polypropylene, polymethyl methacrylate or polycarbonate.

9. The ink introduction sheath according to claim 1, characterized in that: The engaging portion (130, 230) is selected from one of metal, alloy and / or polymer, and the polymer includes ABS engineering plastic.

10. The ink introducing sheath according to claim 1, characterized in that: The elastic member (120, 220) is selected from one of metal, alloy and / or polymer.

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