Ink filling bottle

Abstract

The present invention discloses an ink refill bottle, comprising a bottle body, a mounting base fixed to a bottle mouth, the mounting base having a receiving cavity, the receiving cavity having a hollow tube connected to the bottle body, a pressing cap having a plunger portion slidably inserted into the receiving cavity, two ends of a spring respectively abutting against the lower end of the plunger portion and the bottom of the receiving cavity, the plunger portion being connected to a sealing rubber sleeve forming a dynamic seal with the outer periphery of the hollow tube, a needle holder comprising a plug-in seat and a needle sleeve, the needle sleeve being movably inserted into the hollow tube and forming an air passage, when the pressing cap moves downward relative to the needle holder, the plug-in seat is separated from the sealing rubber sleeve and an air chamber is formed, and an upper end of the needle sleeve is provided with air inlet and outlet holes respectively connected to the insertion hole, the air chamber, and the air passage. The present invention can solve the problem in the prior art that when an external force acts on an ink pen, the ink pen tilts on the needle holder due to the external force deviating from the vertical direction, causing the needle tube to bend, the sealing performance to decrease, and the ink refilling effect to be unstable.

Description

Technical Field

[0001] The invention belongs to the field of stationery, and in particular relates to an ink refill bottle. Background Art

[0002] Currently, the most commonly used ink pens are blotting pens. After filling with ink, the tip of this type of pen inevitably becomes stained with ink, requiring wiping, which is inconvenient. Furthermore, when the ink bottle is full, blotting easily stains the pen barrel. To address this issue, some ink bottles have emerged on the market that allow direct ink filling into the ink chamber of the pen, such as those listed in Chinese invention patents CN201510585566.X, CN201510587210.X, CN201510585795.1, and CN201710423229.X. However, these ink bottles require an external force to press the pen during filling. If the external force deviates from the vertical direction, the pen can easily tilt on the needle holder, causing the needle to bend, resulting in reduced sealing and unstable filling. Summary of the Invention

[0003] The purpose of the present invention is to provide an ink refill bottle that can effectively solve the problem in the prior art that when an external force acts on the ink pen, the external force deviates from the vertical direction, causing the ink pen to tilt on the needle seat, resulting in bending of the needle tube, reduced sealing, and unstable ink filling effect.

[0004] In order to solve the above technical problems, the technical solutions adopted by the present invention are as follows:

[0005] An ink filling bottle comprises a bottle body, a bottle cap, a mounting seat, a needle seat, a pressing cap, a spring and a needle tube;

[0006] The bottle body is provided with a bottle mouth, the bottle cap is mounted on the bottle mouth, the mounting base is fixedly connected to the bottle mouth, the mounting base is provided with a downwardly recessed accommodating cavity, the lower end of the accommodating cavity extends to the top of the cavity of the bottle body, a hollow pipe extending upward is fixedly provided at the bottom center of the accommodating cavity, and the lower end of the hollow pipe is communicated with the cavity of the bottle body;

[0007] The pressing cap is provided with a pressing cap portion and a plunger portion provided at the center of the pressing cap portion and extending downward, the plunger portion being slidably inserted into the accommodating cavity; the upper end of the spring abuts against the lower end of the plunger portion, and the lower end of the spring abuts against the bottom of the accommodating cavity; the plunger portion is a hollow cylinder with upper and lower ends opened, and the lower end opening of the plunger portion is fixedly connected to a first sealing rubber sleeve forming a dynamic sealing structure with the outer periphery of the hollow pipe;

[0008] The needle seat includes a socket formed on the upper part thereof and a needle sleeve formed on the lower part thereof, the socket and the needle sleeve are coaxially connected, a socket is provided in the socket, and the outer periphery of the socket is fixedly connected to a second sealing rubber sleeve which forms a dynamic sealing structure with the inner wall of the cavity of the plunger part; the second sealing rubber sleeve is formed with a sealing lip which protrudes radially toward the axis of the socket at the upper end of the socket; the needle sleeve can be inserted into the hollow pipe movably up and down and a gas channel is formed between the outer periphery of the needle sleeve and the inner wall of the hollow pipe; when the pressing cap moves downward relative to the needle seat, the socket is separated from the first sealing rubber sleeve and an air cavity is formed; the upper end of the needle sleeve is provided with inlet and outlet holes which are respectively connected with the socket, the air cavity and the gas channel;

[0009] The needle tube is coaxially fixed in the needle sleeve, the needle head of the needle tube faces upward and extends to the top of the socket, the lower end of the needle tube is connected to the ink delivery tube connected to the bottle cavity, and the lower end of the ink delivery tube extends to the bottom of the bottle cavity.

[0010] As a preferred embodiment of the present invention, an inverted conical port is formed at the lower end of the hollow tube, and an inverted conical plug matching the inverted conical port is formed at the lower end of the needle sleeve. When the bottle cap is placed on the bottle mouth, the bottle cap can push the needle seat downward so that the inverted conical plug is against the inverted conical port, disconnecting the flow path between the gas channel and the cavity of the bottle body; when the bottle cap is opened, the needle seat is reset under the action of the spring, so that the inverted conical plug is separated from the inverted conical port, connecting the flow path between the gas channel and the cavity of the bottle body.

[0011] As a preferred embodiment of the present invention, the upper end of the needle sleeve is provided with an end panel, and the end panel is provided with a through hole for the needle tube to fit through; a third sealing rubber sleeve, a gasket and a pipe joint are provided in the needle sleeve, and the third sealing rubber sleeve is sleeved on the needle tube and forms a seal between the outer periphery of the needle tube and the inner wall of the needle sleeve, and the upper end surface of the third sealing rubber sleeve abuts against the end panel; the gasket is sleeved on the needle tube, and the upper end surface of the gasket abuts against the lower end surface of the third sealing rubber sleeve; the pipe joint is The lower end of the needle sleeve is snap-connected and the upper end surface of the pipe joint abuts against the lower end surface of the gasket; the lower end of the needle tube is provided with a radially open trumpet-shaped port, and the trumpet-shaped port protrudes from the lower end surface of the gasket; the upper end of the pipe joint is provided with a groove abutting against the trumpet-shaped port, the lower end of the pipe joint is connected to the ink delivery tube, and the pipe joint is provided with a flow channel connecting the needle tube and the ink delivery tube; the pipe joint is formed with a limiting shoulder below the bottom of the mounting seat, the diameter of which is larger than the lower end port of the hollow pipe.

[0012] As a preferred solution of the present invention, the outer periphery of the socket is snap-connected to the inner wall of the second sealing rubber sleeve; the outer periphery of the bottom of the socket is provided with a radial protrusion that abuts against the lower end of the second sealing rubber sleeve.

[0013] As a preferred solution of the present invention, the upper end of the mounting seat is provided with a connecting groove that is folded outward and matches the wall thickness of the bottle mouth, and the connecting groove is threadedly connected to the bottle mouth.

[0014] As a preferred solution of the present invention, a bottle shoulder is provided between the bottle mouth and the bottle body, and the bottle cap is threadably connected to the bottle shoulder.

[0015] As a preferred solution of the present invention, a fourth sealing rubber sleeve is provided in the middle of the bottle cap. When the bottle cap is placed on the bottle mouth, the fourth sealing rubber sleeve is sealingly connected to the upper end of the needle tube.

[0016] As a preferred embodiment of the present invention, a vent hole with a diameter smaller than that of the vent hole is formed at the bottom of the jack, and the jack is connected to the air inlet and outlet holes through the vent hole. When the bottle cap is placed on the bottle mouth, the outer periphery of the lower end of the fourth sealing rubber sleeve is sealed with the inner wall of the vent hole.

[0017] As a preferred embodiment of the present invention, a hole column extending toward one side of the insertion hole is formed in the middle part of the bottle cap, the upper end of the fourth sealing rubber sleeve is inserted into the hole column, and the outer periphery of the fourth sealing rubber sleeve is provided with a limiting portion that abuts against the lower end surface of the hole column; the outer periphery of the hole column is provided with a fixing sleeve, the lower end of the fourth sealing rubber sleeve extends from the lower end of the fixing sleeve, and the lower end of the fixing sleeve is provided with an inner flange, and the upper end surface of the inner flange abuts against the lower end surface of the limiting portion; when the bottle cap is placed on the bottle mouth, the lower end surface of the inner flange abuts against the bottom of the insertion hole.

[0018] As a preferred solution of the present invention, the outer peripheral surface of the fixing sleeve is a conical surface whose diameter gradually decreases toward the side of the insertion hole.

[0019] The ink refill bottle provided by the present invention has the following beneficial effects compared with the prior art:

[0020] The ink filling bottle of the present invention has the dual functions of returning ink and filling ink, and is easy to use and simple to operate. Since the ink returning action is completed before the filling action, there is no problem of ink overflowing during the filling process, which saves materials and is environmentally friendly. In addition, since the external force acts on the pressing cap, it effectively solves the problem in the prior art that when the external force acts on the ink pen, the external force deviates from the vertical direction, causing the ink pen to tilt on the needle seat, causing the needle tube to bend, the sealing performance to decrease, and the ink filling effect to be unstable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0022] Figure 1 This is a schematic structural diagram of an ink refill bottle according to an embodiment of the present invention;

[0023] Figure 2 It is Figure 1 The structure shown is a schematic diagram of the structure after the bottle body is hidden;

[0024] Figure 3 This is a structural schematic diagram of the ink refill bottle according to an embodiment of the present invention when the cap is pressed and moved to the lower limit position;

[0025] Figure 4 It is a structural schematic diagram when the bottle cap is placed on the bottle mouth.

[0026] Markings in the figure:

[0027] Bottle body 1; bottle cap 2; mounting base 3; needle base 4; pressing cap 5; spring 6; needle tube 7; bottle mouth 8; accommodating chamber 9; hollow pipe 10; pressing cap portion 11; plunger portion 12; first sealing rubber sleeve 13; plug seat 14; needle sleeve 15; socket 16; second sealing rubber sleeve 17; sealing lip 18; gas channel 19; air cavity 20; air inlet and outlet holes 21; ink feeding tube 22; inverted cone-shaped port 23; inverted cone-shaped plug 24; end panel 25; third sealing rubber sleeve 26; gasket 27; pipe joint 28; trumpet-shaped port 29; groove 30; flow channel 31; limiting shoulder 32; buckle 33; slot 34; radial protrusion 35; connecting groove 36; bottle shoulder 37; fourth sealing rubber sleeve 38; vent 39; hole column 40; limiting portion 41; fixing sleeve 42; inner flange 43. DETAILED DESCRIPTION

[0028] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Please also refer to Figures 1 to 4 Now, the ink filling bottle provided in the embodiment of the present invention is described.

[0033] like Figures 1 to 4As shown, the ink refill bottle of the embodiment of the present invention includes a bottle body 1, a bottle cap 2, a mounting seat 3, a needle seat 4, a pressing cap 5, a spring 6 and a needle tube 7; the bottle body 1 is provided with a bottle mouth 8, the bottle cap 2 is covered on the bottle mouth 8, the mounting seat 3 is fixedly connected to the bottle mouth 8, the mounting seat 3 is provided with a downwardly concave accommodating cavity 9, the lower end of the accommodating cavity 9 extends to the top of the cavity of the bottle body 1, the bottom center of the accommodating cavity 9 is fixedly provided with a hollow pipe 10 extending upward, the lower end of the hollow pipe 10 is communicated with the cavity of the bottle body 1; the pressing cap 5 is provided with a press The cap portion 11 and the plunger portion 12 provided at the center of the cap portion 11 and extending downward, the plunger portion 12 can be slidably inserted into the accommodating chamber 9 up and down; the upper end of the spring 6 abuts against the lower end of the plunger portion 12, and the lower end of the spring 6 abuts against the bottom of the accommodating chamber 9; the plunger portion 12 is a hollow cylinder with upper and lower ends opened, and the lower end opening of the plunger portion 12 is fixedly connected to a first sealing rubber sleeve 13 that forms a dynamic sealing structure with the outer periphery of the hollow pipe 10; the needle seat 4 includes a socket 14 formed on its upper part and a needle seat formed on its lower part. The sleeve 15, the socket 14 and the needle sleeve 15 are coaxially connected, the socket 14 is provided with a socket 16, the outer periphery of the socket 14 is fixedly connected to a second sealing rubber sleeve 17 that forms a dynamic sealing structure with the inner wall of the cavity of the plunger portion 12; the second sealing rubber sleeve 17 is formed with a sealing lip 18 radially protruding toward the axis of the socket 14 at the upper end of the socket 14; the needle sleeve 15 can be inserted into the hollow pipe 10 movably up and down, and a gas channel 19 is formed between the outer periphery of the needle sleeve 15 and the inner wall of the hollow pipe 10 ; When the push cap 5 moves downward relative to the needle seat 4, the socket 14 is separated from the first sealing rubber sleeve 13 and an air cavity 20 is formed; the upper end of the needle sleeve 15 is provided with an air inlet and outlet hole 21 which are respectively connected to the jack 16, the air cavity 20 and the gas channel 19; the needle tube 7 is coaxially fixed in the needle sleeve 15, the needle head of the needle tube 7 faces upward and extends to the top of the socket 14, and the lower end of the needle tube 7 is connected to the ink delivery tube 22 which is connected to the cavity of the bottle body 1, and the lower end of the ink delivery tube 22 extends to the bottom of the cavity of the bottle body 1.

[0034] The working principle of the ink filling bottle according to the embodiment of the present invention is as follows:

[0035] When the bottle cap 2 is opened, the cavity of the bottle body 1 is connected to the outside through the gas channel 19 and the jack 16 in sequence, so that the air pressure in the entire ink filling bottle is equal to the outside air pressure value; the tail of the ink pen matching the ink filling bottle is inserted into the jack 16 of the ink filling bottle, and the needle tube 7 is inserted into the ink container of the ink pen and connected to the ink container.

[0036] As the press cap 5 is moved downward by an external force, the sealing lip 18 of the second sealing rubber sleeve 17 seals against the pen body, keeping the entire interior of the bottle 1 sealed. At this time, the first sealing rubber sleeve 13 moves downward simultaneously with the press cap 5, gradually increasing the volume of the air cavity 20 and causing the air pressure inside the bottle 1 to gradually decrease, thereby making the air pressure inside the bottle 1 lower than the air pressure inside the ink container. Furthermore, because the interior of the bottle 1 is connected to the ink container via the needle tube 7, the air and remaining ink in the ink container flow sequentially through the needle tube 7 and the ink delivery tube 22 into the interior of the bottle 1, thereby achieving ink return. When the press cap 5 reaches the lower limit, the above-mentioned ink return action is completed.

[0037] When the external force is removed and the cap 5 moves upward (reset) under the action of the spring 6, the first sealing rubber sleeve 13 moves upward simultaneously with the cap 5, gradually reducing the volume of the air cavity 20. This gradually increases the air pressure inside the bottle 1, thereby making the air pressure inside the bottle 1 greater than the air pressure inside the ink container. In this way, the ink in the bottle 1 flows sequentially through the ink delivery tube 22 and the needle tube 7 to the ink container, thus completing the ink filling process. When the air pressure inside the bottle 1 and the air pressure inside the ink container return to the same level, the ink pen can be removed, completing the ink filling process.

[0038] It should be noted that the volume change of the air cavity 20 should be slightly greater than or equal to the volume change of the ink container to ensure that the same volume of ink is filled.

[0039] Thus, the ink refill bottle of the present invention has the dual functions of returning ink and filling ink, making it easy to use and simple to operate. Furthermore, because the return process is completed before the filling process, there is no risk of ink spillage during the filling process. Furthermore, since the external force acts on the depressing cap 5, this effectively solves the problem in the prior art where, when an external force acts on the ink pen, the pen tilts on the needle seat 4 due to the force deviating from the vertical direction, causing the needle tube 7 to bend, resulting in reduced sealing and unstable filling.

[0040] Exemplarily, the lower end of the hollow pipe 10 is formed with an inverted cone-shaped port 23, and the lower end of the needle sleeve 15 is formed with an inverted cone-shaped plug 24 that matches the inverted cone-shaped port 23. When the bottle cap 2 is placed on the bottle mouth 8, the bottle cap 2 can push the needle seat 4 downward, so that the inverted cone-shaped plug 24 and the inverted cone-shaped port 23 are abutted, disconnecting the flow path between the gas channel 19 and the cavity of the bottle body 1, so that a sealed independent space is formed inside the bottle body 1, which effectively prevents the ink bottle from being inverted or When subjected to strong vibration, the ink in the bottle will flow into the connecting gap of the bottle cap 2 or other components through the gas channel 19, thereby preventing the ink from adhering or even dripping when the bottle cap 2 is opened, which affects the normal use of the ink filling bottle; when the bottle cap 2 is opened, the needle seat 4 is reset under the action of the spring 6, so that the inverted cone-shaped plug 24 is separated from the inverted cone port 23, connecting the flow channel between the gas channel 19 and the cavity of the bottle body 1, so that the air pressure everywhere in the entire ink filling bottle is equal to the external air pressure value, which is convenient for subsequent ink filling.

[0041] Exemplarily, in order to better achieve the connection and fixation of the needle tube 7 and the ink delivery tube 22, the upper end of the needle sleeve 15 is provided with an end panel 25, and the end panel 25 is provided with a through hole for the needle tube 7 to fit through; a third sealing rubber sleeve 26, a gasket 27 and a pipe joint 28 are provided in the needle sleeve 15, and the third sealing rubber sleeve 26 is sleeved on the needle tube 7 and forms a seal between the outer periphery of the needle tube 7 and the inner wall of the needle sleeve 15, and the upper end surface of the third sealing rubber sleeve 26 abuts against the end panel 25; the gasket 27 is sleeved on the needle tube 7, and the upper end surface of the gasket 27 abuts against the lower end surface of the third sealing rubber sleeve 26; the pipe The connector 28 is snap-connected to the lower end of the needle sleeve 15 and the upper end surface of the pipe connector 28 abuts against the lower end surface of the gasket 27; the lower end of the needle tube 7 is provided with a radially open trumpet-shaped port 29, and the trumpet-shaped port 29 protrudes from the lower end surface of the gasket 27; the upper end of the pipe connector 28 is provided with a groove 30 abutting against the trumpet-shaped port 29; the lower end of the pipe connector 28 is connected to the ink delivery tube 22, and the pipe connector 28 is provided with a flow channel 31 connecting the needle tube 7 and the ink delivery tube 22; the pipe connector 28 is formed with a limiting shoulder 32 below the bottom of the mounting seat 3, the diameter of which is larger than the lower end port of the hollow pipe 10. As a result, the trumpet-shaped port 29 of the needle tube 7 is confined between the gasket 27 and the pipe joint 28, and the needle tube 7 will not cause axial movement due to the insertion and removal of the ink pen, thereby ensuring the stability of the needle tube 7, and the structure is simple and easy to assemble; in addition, the provision of the third sealing rubber sleeve 26 can prevent the ink in the bottle from flowing out of the connecting gap between the needle tube 7 and the through hole; the limiting shoulder 32 can prevent the needle seat 4 from being pulled up and separated from the pressing cap 5 during the process of pulling out the ink pen.

[0042] Exemplarily, the outer periphery of the socket 14 is snap-connected to the inner wall of the second sealing rubber sleeve 17; in specific implementation, a snap 33 is provided on the middle outer periphery of the socket 14, and a slot 34 is provided on the middle inner wall of the second sealing rubber sleeve 17 for snapping into the snap 33; the bottom outer periphery of the socket 14 is provided with a radial protrusion 35 that abuts against the lower end of the second sealing rubber sleeve 17.

[0043] Illustratively, the upper end of the mounting seat 3 is provided with a connecting groove 36 that is folded outward and matches the wall thickness of the bottle mouth 8 , and the connecting groove 36 is threadedly connected to the bottle mouth 8 .

[0044] Illustratively, a bottle shoulder 37 is provided between the bottle mouth 8 and the bottle body 1 , and the bottle cap 2 is threadedly connected to the bottle shoulder 37 .

[0045] Illustratively, a fourth sealing rubber sleeve 38 is provided in the middle of the bottle cap 2. When the bottle cap 2 is placed on the bottle mouth 8, the fourth sealing rubber sleeve 38 is sealed and sleeved with the upper end of the needle tube 7 to prevent the ink in the bottle from flowing out of the needle tube 7 due to tipping over when the ink bottle is idle.

[0046] Illustratively, a vent hole 39 having a diameter smaller than that of the vent hole 16 is formed at the bottom of the socket 16, and the socket 16 is connected to the air inlet and outlet holes 21 through the vent hole 39. When the bottle cap 2 is placed on the bottle mouth 8, the outer periphery of the lower end of the fourth sealing rubber sleeve 38 is sealed with the inner wall of the vent hole 39, thereby further improving the sealing performance of the ink filling bottle when it is idle.

[0047] Exemplarily, to facilitate the assembly of the fourth sealing sleeve 38, a hole column 40 extending toward one side of the insertion hole 16 is formed in the middle part of the bottle cap 2, and the upper end of the fourth sealing sleeve 38 is inserted into the hole column 40, and the outer periphery of the fourth sealing sleeve 38 is provided with a limiting portion 41 that abuts against the lower end surface of the hole column 40; the outer periphery of the hole column 40 is sleeved with a fixing sleeve 42, and the lower end of the fourth sealing sleeve 38 extends from the lower end of the fixing sleeve 42, and the lower end of the fixing sleeve 42 is provided with an inner flange 43, and the upper end surface of the inner flange 43 abuts against the lower end surface of the limiting portion 41; when the bottle cap 2 is covered on the bottle mouth 8, the lower end surface of the inner flange 43 abuts against the bottom of the insertion hole 16, thereby pushing the needle seat 4 to move downward, so that the inverted cone plug 24 abuts against the inverted cone port 23, disconnecting the flow channel between the gas channel 19 and the cavity of the bottle body 1. In this embodiment, the connection between the hole column 40 and the fixing sleeve 42 is a snap-fit ​​connection 33 .

[0048] For example, the outer circumference of the fixing sleeve 42 is a conical surface whose diameter gradually decreases toward the insertion hole 16. This design not only facilitates the insertion of the fixing sleeve 42 into the insertion hole 16, thereby facilitating the closing of the bottle cap 2, but also facilitates the discharge of air from the bottle during the insertion of the fixing sleeve 42 into the insertion hole 16, thereby avoiding squeezing of the air inside the bottle.

[0049] It should also be noted that, with the exception of the spring 6, needle tube 7, and the various sealing rubber sleeves, all other components are preferably injection-molded, and their hardness should be much greater than that of the sealing rubber sleeves (preferably silicone). In particular, the components forming the gas passage 19, the inlet and outlet holes 21, and the vent 39 (such as the needle holder 4 and hollow tube 10) are injection-molded. These components are less susceptible to deformation and will not clog due to adhesion to the inner wall of the passage even when left idle for extended periods, effectively resolving the clogging problem of pores formed in silicone in the prior art.

[0050] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. An ink refill bottle, characterized in that: Including bottle body, bottle cap, mounting base, needle base, push cap, spring and needle tube; The bottle body is provided with a bottle mouth, the bottle cap is mounted on the bottle mouth, the mounting base is fixedly connected to the bottle mouth, the mounting base is provided with a downwardly recessed accommodating cavity, the lower end of the accommodating cavity extends to the top of the cavity of the bottle body, a hollow pipe extending upward is fixedly provided at the bottom center of the accommodating cavity, and the lower end of the hollow pipe is communicated with the cavity of the bottle body; The pressing cap is provided with a pressing cap portion and a plunger portion provided at the center of the pressing cap portion and extending downward, the plunger portion being slidably inserted into the accommodating cavity; the upper end of the spring abuts against the lower end of the plunger portion, and the lower end of the spring abuts against the bottom of the accommodating cavity; the plunger portion is a hollow cylinder with upper and lower ends opened, and the lower end opening of the plunger portion is fixedly connected to a first sealing rubber sleeve forming a dynamic sealing structure with the outer periphery of the hollow pipe; The needle seat includes a socket formed on the upper part thereof and a needle sleeve formed on the lower part thereof, the socket and the needle sleeve are coaxially connected, a socket is provided in the socket, and the outer periphery of the socket is fixedly connected to a second sealing rubber sleeve which forms a dynamic sealing structure with the inner wall of the cavity of the plunger part; the second sealing rubber sleeve is formed with a sealing lip which protrudes radially toward the axis of the socket at the upper end of the socket; the needle sleeve can be inserted into the hollow pipe movably up and down and a gas channel is formed between the outer periphery of the needle sleeve and the inner wall of the hollow pipe; when the pressing cap moves downward relative to the needle seat, the socket is separated from the first sealing rubber sleeve and an air cavity is formed; the upper end of the needle sleeve is provided with inlet and outlet holes which are respectively connected with the socket, the air cavity and the gas channel; The needle tube is coaxially fixed in the needle sleeve, the needle head of the needle tube faces upward and extends to the top of the socket, the lower end of the needle tube is connected to the ink delivery tube connected to the bottle cavity, and the lower end of the ink delivery tube extends to the bottom of the bottle cavity.

2. The ink refill bottle according to claim 1, characterized in that: An inverted conical port is formed at the lower end of the hollow tube, and an inverted conical plug matching the inverted conical port is formed at the lower end of the needle sleeve. When the bottle cap is placed on the bottle mouth, the bottle cap can push the needle seat downward, causing the inverted conical plug to abut against the inverted conical port, thereby disconnecting the flow path between the gas channel and the cavity of the bottle body; When the bottle cap is opened, the needle seat is reset under the action of the spring, so that the inverted cone-shaped plug is separated from the inverted cone-shaped port, and the flow channel between the gas channel and the cavity of the bottle body is connected.

3. The ink refill bottle according to claim 1, characterized in that: The upper end of the needle sleeve is provided with an end panel, and the end panel is provided with a through hole for the needle tube to fit through; a third sealing rubber sleeve, a gasket and a pipe joint are provided in the needle sleeve, the third sealing rubber sleeve is sleeved on the needle tube and forms a seal between the outer periphery of the needle tube and the inner wall of the needle sleeve, and the upper end surface of the third sealing rubber sleeve abuts against the end panel; the gasket is sleeved on the needle tube, and the upper end surface of the gasket abuts against the lower end surface of the third sealing rubber sleeve; the pipe joint abuts against the lower end surface of the needle sleeve The ends are snap-connected and the upper end surface of the pipe joint abuts against the lower end surface of the gasket; the lower end of the needle tube is provided with a radially open trumpet-shaped port, and the trumpet-shaped port protrudes from the lower end surface of the gasket; the upper end of the pipe joint is provided with a groove abutting against the trumpet-shaped port, the lower end of the pipe joint is connected to the ink delivery tube, and the pipe joint is provided with a flow channel connecting the needle tube and the ink delivery tube; the pipe joint is formed with a limiting shoulder with a diameter larger than the lower end port of the hollow pipe below the bottom of the mounting seat.

4. The ink refill bottle according to claim 1, characterized in that: The outer periphery of the socket is snap-connected with the inner wall of the second sealing rubber sleeve; the outer periphery of the bottom of the socket is provided with a radial protrusion that abuts against the lower end of the second sealing rubber sleeve.

5. The ink refill bottle according to claim 1, characterized in that: The upper end of the mounting seat is provided with a connecting groove which is folded outward and matches the wall thickness of the bottle mouth, and the connecting groove is threadedly connected to the bottle mouth.

6. The ink refill bottle according to any one of claims 1 to 5, characterized in that: A bottle shoulder is provided between the bottle mouth and the bottle body, and the bottle cap is threadably connected to the bottle shoulder.

7. The ink refill bottle according to claim 6, characterized in that: A fourth sealing rubber sleeve is provided in the middle of the bottle cap. When the bottle cap is placed on the bottle mouth, the fourth sealing rubber sleeve is sealingly sleeved with the upper end of the needle tube.

8. The ink refill bottle according to claim 7, characterized in that: A vent hole with a diameter smaller than that of the jack is formed at the bottom of the jack, and the jack is connected to the air inlet and outlet holes through the vent hole. When the bottle cap is placed on the bottle mouth, the outer periphery of the lower end of the fourth sealing rubber sleeve is sealed with the inner wall of the vent hole.

9. The ink refill bottle according to claim 8, characterized in that: A hole column extending toward one side of the insertion hole is formed in the middle of the bottle cap, the upper end of the fourth sealing rubber sleeve is inserted into the hole column, and the outer periphery of the fourth sealing rubber sleeve is provided with a limiting portion that abuts against the lower end surface of the hole column; a fixing sleeve is provided on the outer periphery of the hole column, the lower end of the fourth sealing rubber sleeve extends from the lower end of the fixing sleeve, and the lower end of the fixing sleeve is provided with an inner turning edge, the upper end surface of the inner turning edge abuts against the lower end surface of the limiting portion; when the bottle cap is placed on the bottle mouth, the lower end surface of the inner turning edge abuts against the bottom of the insertion hole.

10. The ink refill bottle according to claim 9, characterized in that: The outer peripheral surface of the fixing sleeve is a conical surface whose diameter gradually decreases toward the insertion hole.

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