Ink-refillable pen and ink-refilling device

Abstract

The present invention discloses a refillable pen and an ink refilling device. The pen includes a penholder and an ink outlet disposed at the head of the penholder. An ink storage chamber is disposed within the penholder. A piston valve is disposed at the rear of the penholder. The piston valve includes a valve seat and a piston. An ink refilling hole is formed in the middle of the piston. An ink refilling tube is connected to the ink refilling hole and extends into the ink storage chamber. When the piston is pushed to move, ink can be refilled into the ink storage chamber through the ink refilling hole. The refillable pen and ink refilling device of the present invention can significantly improve ink refilling efficiency, eliminate the risk of contamination during user operation, and greatly extend the service life of the pen.

Description

Technical Field

[0001] The present invention relates to a writing tool, in particular to an ink-refillable pen and an ink-refilling device. Background Art

[0002] Common whiteboard pens, markers, and highlighters typically use roll-on ink cartridges with limited ink storage capacity. Once the ink runs out, refilling is not possible and the pen must be discarded. Even for direct-liquid whiteboard pens, highlighters, markers, or ballpoint pens with larger ink storage capacities, the pen still has to be discarded once the ink runs out, resulting in a huge waste of resources and increasing the burden of environmental pollution.

[0003] Common student fountain pens include those that use cartridges to store ink and those that use a dispenser or cartridge to fill ink. While dispensers and cartridges can be refilled repeatedly, refilling is cumbersome and inefficient, and can stain the grip area of ​​the pen, requiring careful wiping, which can easily stain hands. This, in part, is why cartridge pens dominate the market share compared to traditional refillable pens.

[0004] Fountain pens that use cartridges for ink storage have a limited amount of ink. Once the ink is used up, the cartridge must be discarded. This massive amount of cartridges is discarded each year, resulting in a significant waste of resources and increasing environmental pollution. Whiteboard markers, highlighters, markers, and ballpoint pens with removable cartridges also face this problem. Summary of the Invention

[0005] In order to solve the above problems, the present invention provides an ink-refillable pen and an ink-refilling device, which extend the service life of the pen and avoid resource waste and environmental pollution.

[0006] To achieve the above-mentioned purpose, the ink-refillable pen of the present invention comprises a pen body and an ink-writing outlet portion arranged at the head of the pen body, an ink storage cavity is arranged in the pen body, and the ink-writing outlet portion is communicated with the ink storage cavity; a piston valve is arranged at the tail end of the pen body, and the ink storage cavity is located between the ink-writing outlet portion and the piston valve, and the piston valve comprises a valve seat and a piston, the valve seat is fixedly connected to the pen body, a compression spring is arranged between the valve seat and the piston, and the piston can slide relative to the valve seat along the axial direction of the pen body, and an ink-refilling hole is opened in the middle of the piston, and the ink-refilling hole is connected to the ink-refilling hole. An ink filling tube is connected and extends into the ink storage chamber; a pen tail plug is also provided at the tail of the pen shaft, and a sealing plug capable of sealing the ink filling hole is provided in the middle of the pen tail plug; a limiting portion for limiting the piston is also provided on the pen tail plug; under the action of the restoring force of the compression spring, when the piston abuts against the limiting portion, the sealing plug seals the ink filling hole; when the piston is pushed to move in a direction away from the limiting portion, the sealing plug is disengaged from the ink filling hole, and ink can be added to the ink storage chamber through the ink filling hole.

[0007] Preferably, when the ink adding tube extends into the ink storage cavity, the free end of the ink adding tube extends to an end of the ink storage cavity close to the ink writing outlet portion.

[0008] Preferably, a V-shaped cutout is provided at the free end of the ink filling tube.

[0009] Preferably, the pen tail plug is provided with a recess for connecting to an ink filling device, and the pen tail plug is also provided with a liquid overflow window, so that the ink in the ink filling device passes through the liquid overflow window into the ink filling hole when adding ink.

[0010] The ink-filling device of the present invention is used to fill ink for the above-mentioned refillable pen, and the ink-filling device includes an elastic ink bottle and a guide seat connected to the bottle mouth of the elastic ink bottle; the guide seat is provided with a convex portion matching the concave portion, and the convex portion is provided with at least one top plate, and the guide seat is provided with an ink outlet, and the ink outlet is connected to a guide tube, and the guide tube extends into the elastic ink bottle; when the convex portion is inserted into the concave portion, the top plate passes through the liquid flow window and pushes the piston to move in a direction away from the limiting portion, so that the sealing plug is disengaged from the ink-filling hole.

[0011] Preferably, a sealing ring is provided between the convex portion and the concave portion.

[0012] Preferably, when the guide tube extends into the elastic ink bottle, the free end of the guide tube extends to the lowest point of the bottom of the elastic ink bottle in the circumferential direction.

[0013] Preferably, a V-shaped incision is provided at the free end of the flow guide tube.

[0014] Preferably, a conical groove is formed on the top of the convex portion, and the bottom of the groove is connected to the ink outlet.

[0015] Preferably, the center of the bottom of the elastic ink bottle protrudes upward, so that the bottom of the elastic ink bottle is conical.

[0016] The refillable pen and refilling device of the present invention can significantly improve the refilling efficiency and eliminate the risk of contamination during user operation. At the same time, it greatly extends the service life of the pen, improves the utilization efficiency of non-renewable resources such as plastic used in the pen, and greatly reduces the environmental pollution caused by plastic and ink residues caused by discarding pens or ink cartridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of an ink-refillable pen according to an embodiment of the present invention;

[0018] Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle;

[0019] Figure 3 A perspective schematic diagram of a pen tail plug according to an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of an ink-refillable pen according to another embodiment of the present invention;

[0021] Figure 5 is a schematic diagram of an ink adding device according to an embodiment of the present invention;

[0022] Figure 6 A schematic three-dimensional diagram of a flow guide seat according to an embodiment of the present invention;

[0023] Figure 7 for Figure 6 A schematic diagram of a cutaway state of a guide seat;

[0024] Figure 8 A schematic diagram of a flow guide seat according to another embodiment of the present invention;

[0025] Figure 9 A schematic diagram of the ink-filling device of the present invention filling an ink-fillable pen with ink;

[0026] Figure 10 for Figure 9 A partial enlarged schematic diagram of area B in the middle. DETAILED DESCRIPTION

[0027] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0028] The refillable pen of the present invention is applicable to all direct liquid writing pens, including subcategories such as whiteboard markers, highlighters, markers, and fountain pens, as well as direct liquid ballpoint pens. For ease of explanation, this specific embodiment uses a direct liquid marker as an example.

[0029] Figure 1 FIG. 1 is a schematic diagram of an ink-refillable pen 100 according to an embodiment of the present invention. Figure 2 for Figure 1 A partial enlarged schematic diagram of area A in the middle. Figure 1 and 2 As shown, the refillable pen 100 of the present invention includes a pen body 10 and an ink outlet 11 disposed at the head of the pen body 10. The pen body 11 is provided with an ink storage chamber 101, and the ink outlet 11 is connected to the ink storage chamber 101. The ink storage chamber 101 is used to store refillable ink, and the ink outlet 11 is connected to the ink storage chamber 101 to obtain ink from the ink chamber 101 for writing.

[0030] A piston valve 12 is provided at the rear end of the pen body 10. The ink reservoir 101 is located between the writing outlet 11 and the piston valve 12. The piston valve 12 comprises a valve seat 121 and a piston 122. The valve seat 121 is fixedly connected to the pen body 10, which can be fixed by an interference fit, threaded connection, adhesive bonding, or welding. A compression spring 123 is provided between the valve seat 121 and the piston 122. The piston 122 can slide axially relative to the valve seat 121 along the pen body 10. An ink filling port 124 is defined in the center of the piston 122. The ink filling port 124 is connected to the ink filling tube 14, which extends into the ink reservoir 101.

[0031] The tail of the pen holder 10 is also provided with a pen tail plug 13. Figure 3 FIG. 1 is a perspective view of a pen tail plug 13 according to an embodiment of the present invention. Figure 3 Combined with Figure 2 A sealing plug 131 is provided in the middle of the end cap 13 to seal the ink filling hole 124. The end cap 13 is also provided with a stopper 132 to limit the position of the piston 122. Under the restoring force of the compression spring 123, when the piston 123 abuts the stopper 132, the sealing plug 131 seals the ink filling hole 124. When the piston 123 is pushed away from the stopper 132, the sealing plug 131 disengages from the ink filling hole 124, allowing ink to be added to the ink reservoir 101 through the ink filling hole 124.

[0032] The pen tail plug 13 is fixedly connected to the pen body 10 and / or the valve seat 121. The fixed connection method of the pen tail plug 13 and the valve seat 121 can be interference fit, threaded connection, gluing or welding, etc., preferably interference fit and airtight welding.

[0033] A sealing ring 125 is provided between the valve seat 121 and the piston 122 to prevent ink leakage.

[0034] A V-shaped cutout is provided at the free end of the ink adding tube 14 to prevent the free end of the ink adding tube 14 from being blocked when in contact with other surrounding surfaces, thereby affecting conduction.

[0035] When the ink adding tube 14 extends into the ink storage chamber 101, the free end of the ink adding tube 14 extends to the end of the ink storage chamber 101 close to the writing ink outlet 11. Figure 1 Filling with ink is done in the position shown, that is, with the pen tip facing up and the pen in a vertical position.

[0036] Continue to see Figure 2 and Figure 3 The pen tail plug 13 is provided with a recess 134 for connecting to the ink filling device. The pen tail plug 13 is also provided with a liquid overflow window 133, which is used for the ink in the ink filling device to pass through the liquid overflow window 133 into the ink filling hole 124 when adding ink.

[0037] Figure 4 A schematic diagram of an ink-refillable pen 100 according to another embodiment of the present invention is shown. Figure 1 Compared with the refillable pen 100, Figure 4 The refillable pen 100 in the figure shows a pen cap 15, which is interference-fitted with the pen barrel 10. The connection between the pen cap 15 and the pen barrel 10 can be a conventional connection method, which will not be described in detail here.

[0038] Figure 5 FIG. 1 is a schematic diagram of an ink adding device 200 according to an embodiment of the present invention. Figure 6 FIG. 2 is a three-dimensional schematic diagram of a flow guide seat 21 according to an embodiment of the present invention. Figure 7 for Figure 6 A schematic diagram of a cutaway state of a guide seat; Figure 9 Schematic diagram of the ink refilling device 200 of the present invention refilling ink for the refillable pen 100. Figure 10 for Figure 9 A partial enlarged schematic diagram of area B in the middle.

[0039] like Figure 5-7 as well as Figure 9 and 10 As shown, the ink filling device 200 of the present invention is used to fill ink in the aforementioned refillable pen 100 . The ink filling device 200 includes an elastic ink bottle 20 and a guide seat 21 connected to the bottle mouth 201 of the elastic ink bottle 20 .

[0040] The guide seat 21 is provided with a convex portion 212 that matches the concave portion 134 of the refillable pen 100, and at least one top plate 213 is provided on the convex portion 212. The guide seat 21 is provided with an ink outlet 211, and the ink outlet 211 is connected to a guide tube 22, which extends into the elastic ink bottle 20.

[0041] When the protrusion 212 is inserted into the recess 134, the top plate 213 pushes the piston 122 through the liquid-passing window 133, moving it away from the stopper 132, disengaging the sealing plug 131 from the ink-filling hole 124. By squeezing the elastic ink bottle 20, the ink in the elastic ink bottle 20 flows out of the ink outlet 211 through the flow guide tube 22, through the liquid-passing window 133, out of the ink-filling hole 124 of the refillable pen 100, through the ink-filling tube 14, and into the ink storage chamber 101.

[0042] When the guide tube 21 extends into the elastic ink bottle 20 , the free end of the guide tube 21 extends to the lowest point in the circumferential direction of the bottom of the elastic ink bottle 20 , so that the ink in the elastic ink bottle 20 can be filled to the maximum extent.

[0043] A V-shaped cutout is provided at the free end of the flow guiding tube 21 to prevent the free end of the flow guiding tube 21 from being blocked when in contact with other surrounding surfaces, thereby affecting liquid aspiration.

[0044] When the convex portion 212 is inserted into the concave portion 134 , a sealing ring 214 is provided between the convex portion 212 and the concave portion 134 . The sealing ring 214 can be sleeved on the convex portion 212 , as shown in 6 and 7 .

[0045] like Figure 5 As shown, the ink refilling device 200 of the present invention further includes a bottle cap 23. A sealing rod 231 is provided in the middle of the bottle cap 23 to seal the ink outlet 211. When ink refilling is not required, the bottle cap 23 covers the protrusion 212 of the guide seat 21. A sealing ring 214 can seal the bottle cap 23 and the guide seat 21.

[0046] The center of the bottom of the elastic ink bottle 20 protrudes upward, giving the bottom of the elastic ink bottle 20 a conical shape. The conical bottom allows the free end of the guide tube 22 extending into the bottle to naturally extend to the lowest circumference of the bottom of the elastic ink bottle 20, thereby ensuring maximum absorption of residual ink.

[0047] Figure 6 In the embodiment shown, the number of top sheets 213 is 3, and the number of top sheets can be set as needed.

[0048] Figure 8 A schematic diagram of a guide seat 21 according to another embodiment of the present invention is shown in FIG. Figure 8 and Figure 10As shown, a conical groove 2121 is formed on the top of the convex portion 212, and the bottom of the groove 2121 is connected to the ink outlet 211. This makes the top of the convex portion 212 funnel-shaped, which is beneficial for ink reflux and avoids ink residue.

[0049] Continue to see Figure 9 and Figure 10 When the refillable pen 100 needs to be refilled with ink, the bottle cap 23 of the ink filling device 200 is removed, the refillable pen 100 is upright, the end plug 13 of the refillable pen 100 is aligned with the guide seat 21 of the ink filling device 200, and then the protrusion 212 of the guide seat 21 is inserted into the recessed portion 134 of the end plug 13 of the refillable pen 100. At this time, the top plate 213 passes through the liquid window 133 and pushes the piston 122 to move away from the limit portion 132, so that the sealing plug 131 is disengaged from the ink filling hole 124. At this time, the ink filling operation can be carried out.

[0050] Through Figure 9 The elastic ink bottle 20 is squeezed in the direction indicated by the arrows on both sides of the elastic ink bottle 20, and the air pressure in the bottle rises, and the ink will be Figure 9 and Figure 10 Ink flows in the direction indicated by the middle arrow, passing through the guide tube 22, out of the ink outlet 211, through the liquid window 133, out of the ink filling port 124 of the refillable pen 100, through the ink filling tube 14, and into the internal ink storage chamber 101. Releasing the body of the elastic ink bottle 20 causes a sudden drop in pressure, and all the ink in the flow channel and some of the air in the ink storage chamber 101 are drawn back into the elastic ink bottle 20, completing one refilling cycle. Repeatedly squeezing and releasing the body of the elastic ink bottle 20 allows for multiple refilling cycles, until the ink level in the ink storage chamber 101 is flush with the free end of the ink filling tube 14, marking the end of refilling.

[0051] In the refillable pen 100 of the present invention, the tail plug 13 and piston valve 12 cooperate to form a conductive structure with a normally closed valve. By plugging the tail plug 13 into the ink refilling device 200 of the present invention, the ink can be pumped upward by squeezing the elastic ink bottle 20, replenishing the ink storage chamber 101 of the refillable pen 100. This invention significantly improves ink refilling efficiency and eliminates the risk of contamination during user operation. It also significantly extends the pen's lifespan, improves the utilization of non-renewable resources such as plastics, and significantly reduces environmental pollution caused by plastic and ink residues from discarded writing instruments or ink cartridges.

[0052] As described above, exemplary embodiments of the present invention have been described in detail with reference to the accompanying drawings. It should be understood that the present invention is not intended to limit the scope of protection of the present invention by these specific details. Without departing from the spirit and scope of the present invention, equivalent or similar changes may be made to the structure and features of the exemplary embodiments, and such changes will also fall within the scope of protection defined by the claims appended hereto.

Claims

1. A refillable pen comprising a penholder and an ink outlet disposed at the head of the penholder, characterized in that: An ink storage cavity is provided in the pen barrel, and the writing ink outlet is connected to the ink storage cavity; A piston valve is provided at the tail end of the pen body, and the ink storage chamber is located between the ink outlet portion and the piston valve. The piston valve includes a valve seat and a piston. The valve seat is fixedly connected to the pen body, and a compression spring is provided between the valve seat and the piston. The piston can slide axially along the pen body relative to the valve seat. An ink filling hole is provided in the middle of the piston, and an ink filling tube is connected to the ink filling hole. The ink filling tube extends into the ink storage chamber. The tail of the pen barrel is further provided with a tail plug, the middle portion of which is provided with a sealing plug capable of sealing the ink filling hole, and the tail plug is further provided with a limiting portion for limiting the position of the piston. Under the action of the restoring force of the compression spring, when the piston abuts against the limiting portion, the sealing plug seals the ink filling hole; The pen end plug is provided with a recess for connecting to the ink filling device, and the pen end plug is also provided with a liquid flow window, so that the ink in the ink filling device can pass through the liquid flow window into the ink filling hole during ink filling; When the piston is pushed to move in a direction away from the limiting portion, the sealing plug is separated from the ink adding hole, and ink can be added to the ink storage cavity through the ink adding hole.

2. The refillable pen according to claim 1, characterized in that When the ink adding tube extends into the ink storage cavity, the free end of the ink adding tube extends to an end of the ink storage cavity close to the writing ink outlet portion.

3. The refillable pen according to claim 2, characterized in that The free end of the ink filling tube is provided with a V-shaped incision.

4. An ink refilling device for refilling the refillable pen according to claim 1, characterized in that: The ink adding device includes an elastic ink bottle and a guide seat connected to the bottle mouth of the elastic ink bottle; The guide seat is provided with a convex portion matching the concave portion, and at least one top sheet is provided on the convex portion. The guide seat is provided with an ink outlet, and the ink outlet is connected to a guide tube, and the guide tube extends into the elastic ink bottle; When the convex portion is inserted into the concave portion, the top plate passes through the liquid flow window and pushes the piston to move in a direction away from the limiting portion, so that the sealing plug is separated from the ink filling hole.

5. The ink adding device according to claim 4, wherein: A sealing ring is provided between the convex portion and the concave portion.

6. The ink adding device according to claim 4, wherein: When the guide tube extends into the elastic ink bottle, the free end of the guide tube extends to the lowest point in the circumferential direction of the bottom of the elastic ink bottle.

7. The ink adding device according to claim 6, wherein: The free end of the guide tube is provided with a V-shaped incision.

8. The ink adding device according to claim 4, wherein: A conical groove is formed on the top of the convex portion, and the bottom of the groove is connected to the ink outlet.

9. The ink adding device according to claim 4, wherein: The center of the bottom of the elastic ink bottle protrudes upward, so that the bottom of the elastic ink bottle is conical.

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