Plug structure, liquid box and pen

Abstract

The invention discloses a plug structure, a liquid box and a pen. The pen comprises a pen tube, a water diversion device, a tail sleeve and the liquid box. And the water diverter is accommodated in the pen tube. The tail sleeve is detachably connected with the pen tube. The liquid box is contained in the tail sleeve and extends into the pen tube. The liquid cartridge includes a container and a plug structure. The container has an opening. The plug structure is arranged in the container and comprises a cover body part, an elastic connecting part and an annular wall part. The elastic connecting part is connected with the cover body part on one side, far away from the opening, of the cover body part, and is provided with at least one hollow part; the annular wall part is connected with the elastic connecting part and surrounds the cover body part. And the annular gap is formed between the side surface of the cover body part and the annular wall part and is communicated with the hollow part. The water diversion device abuts against the cover body part, so that the annular gap is opened. Therefore, the problem of liquid leakage when the liquid box is replaced can be effectively avoided.

Description

Technical Field

[0001] The present disclosure relates to a plug structure, a liquid cartridge, and a gel pen. Background Art

[0002] A gel pen is provided with a liquid cartridge inside to store ink. When writing, the refill is pressed to open a valve, so that the ink in the liquid cartridge can flow through the valve to a water supply body and be supplied to the refill, thereby enabling the refill to write. A conventional water supply body is usually a sponge sleeve, which is sleeved outside the refill. The sponge sleeve communicates with the ink chamber through an ink valve, adsorbs the ink in the ink chamber, and then supplies it to the refill for writing.

[0003] However, when the ink runs out and the liquid cartridge needs to be replaced, the opening of the existing liquid cartridge does not have a sealing structure, so it is easy to leak liquid when taken out. If leakage is not desired, it is necessary to take out the liquid cartridge with the opening facing up, which increases the inconvenience for the user to replace the liquid cartridge.

[0004] Therefore, how to provide a plug structure, a liquid cartridge, and a gel pen that can solve the above problems is one of the problems that the industry urgently wants to invest in research and development resources to solve. Summary of the Invention

[0005] In view of this, an object of the present disclosure is to provide a plug structure, a liquid cartridge, and a pen that can solve the above problems.

[0006] To achieve the above object, according to an embodiment of the present disclosure, a plug structure includes a cover portion, an elastic connection portion, and an annular wall portion. The elastic connection portion connects the cover portion and has at least one hollow portion. The annular wall portion connects the elastic connection portion and surrounds the cover portion. An annular gap is formed between the side surface of the cover portion and the annular wall portion and communicates with the hollow portion. The annular wall portion is configured to abut against the side surface to seal the annular gap.

[0007] In one or more embodiments of the present disclosure, the annular wall portion has at least one annular flange. The annular flange is located on the inner wall surface of the annular wall portion. The annular wall portion is configured to abut against the side surface of the cover portion by using the annular flange.

[0008] In one or more embodiments of the present disclosure, the cover portion is configured to be pressed to deform the elastic connection portion, so that the annular flange is separated from the side surface of the cover portion to open the annular gap.

[0009] In one or more embodiments of the present disclosure, the number of the hollow portions is multiple. The elastic connection portion includes a plurality of connecting columns. Both ends of each connecting column are respectively connected to the cover portion and the annular wall portion. The connecting columns and the hollow portions are alternately arranged in a ring shape.

[0010] In one or more embodiments of the present disclosure, the elastic connection portion includes a clamping piece. The clamping piece is clamped to the bottom surface of the cover portion.

[0011] In one or more embodiments of the present disclosure, the elastic connection portion and the annular wall portion form a single structure.

[0012] In one or more embodiments of the present disclosure, the hardness of the cover portion is greater than the hardness of the annular wall portion.

[0013] To achieve the above object, according to an embodiment of the present disclosure, a liquid cartridge includes a container and a plug structure. The container has an opening. The plug structure is disposed in the container and includes a cover portion, an elastic connection portion, and an annular wall portion. The elastic connection portion connects the cover portion on a side of the cover portion away from the opening and has at least one hollow portion. The annular wall portion connects the elastic connection portion and surrounds the cover portion. An annular gap is formed between the side surface of the cover portion and the annular wall portion and communicates with the hollow portion. The annular wall portion is clamped between the inner tube surface of the container and the side surface of the cover portion, so that the annular gap is sealed.

[0014] In one or more embodiments of the present disclosure, the annular wall portion has at least one annular flange. The annular flange is located on the outer wall surface of the annular wall portion and abuts against the inner tube surface of the container.

[0015] In one or more embodiments of the present disclosure, the inner tube surface of the container has a retracted step portion. The plug structure is clamped to the retracted step portion.

[0016] In one or more embodiments of the present disclosure, the diameter of the container gradually decreases from the opening toward the retracted step portion.

[0017] To achieve the above object, according to an embodiment of the present disclosure, a writing instrument includes a pen tube, a water feeder, a tail sleeve, and a liquid cartridge. The water feeder is accommodated in the pen tube. The tail sleeve is detachably connected to the pen tube. The liquid cartridge is accommodated in the tail sleeve and extends into the pen tube. The liquid cartridge includes a container and a plug structure. The container has an opening. The plug structure is disposed in the container and includes a cover portion, an elastic connection portion, and an annular wall portion. The elastic connection portion connects the cover portion on a side of the cover portion away from the opening and has at least one hollow portion. The annular wall portion connects the elastic connection portion and surrounds the cover portion. An annular gap is formed between the side surface of the cover portion and the annular wall portion and communicates with the hollow portion. The water feeder presses against the cover portion, so that the annular gap is opened.

[0018] In summary, in the plug structure of the present disclosure, the cover portion and the annular wall portion are connected via an elastic connecting portion. When the plug structure is installed in the container of the liquid cartridge, the annular gap formed between the side surface of the cover portion and the annular wall portion is clamped between the inner tube surface of the container and the side surface of the cover portion, so that the annular gap is sealed. When the liquid cartridge is installed in the writing instrument, the water feeder of the writing instrument presses against the cover portion and causes the elastic connecting portion to elastically deform, so that the annular gap is in an open state, thereby allowing the liquid in the liquid cartridge to flow to the pen tip through the plug structure for writing. When the liquid cartridge is taken out of the writing instrument, the water feeder is separated from the cover portion, causing the elastic connecting portion to elastically recover and the annular gap to be in a sealed state. Thus, the problem of liquid leakage during the replacement of the liquid cartridge can be effectively avoided.

[0019] The above is only used to elaborate on the problems to be solved by the present disclosure, the technical means for solving the problems, and the effects produced thereby. The specific details of the present disclosure will be introduced in detail in the following embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To make the above and other objects, features, advantages and embodiments of the present disclosure more obvious and understandable, the description of the accompanying drawings is as follows:

[0021] Figure 1 FIG. 1 is a perspective view of a direct liquid writing instrument according to an embodiment of the present disclosure;

[0022] Figure 2 FIG. 2 is Figure 1 an exploded view of the direct liquid writing instrument in FIG. 1;

[0023] Figure 3 FIG. 3 is Figure 2 a perspective cross-sectional view of the plug structure in FIG. 2;

[0024] Figure 4 FIG. 4 is Figure 2 a perspective cross-sectional view of the liquid cartridge in FIG. 2;

[0025] Figure 5 FIG. 5 is Figure 1 a cross-sectional view of the direct liquid writing instrument in FIG. 1;

[0026] Figure 6 FIG. 6 is Figure 5 a partially enlarged view of FIG. 5;

[0027] Figure 7 FIG. 7 is Figure 5 another partially enlarged view of FIG. 5.

[0028]

SYMBOL DESCRIPTION

[0029] 100: Direct liquid writing instrument

[0030] 110: Pen tube

[0031] 120: Water intake device

[0032] 130: Tail sleeve

[0033] 140: Water supply body

[0034] 150: Pen tip

[0035] 160: Pen cap

[0036] 200: Liquid cartridge

[0037] 210: Container

[0038] 211: Opening

[0039] 212: Inner tube surface

[0040] 212a: Retracted step portion

[0041] 220: Plug structure

[0042] 221: Cover part

[0043] 221a: Side surface

[0044] 222: Elastic connection part

[0045] 222a: Hollowed-out part

[0046] 222b: Connecting column

[0047] 222c: Engaging piece

[0048] 223: Annular wall part

[0049] 223a: Inner wall surface

[0050] 223a1, 223b1: Annular flange

[0051] 223b: Outer wall surface

[0052] G: Annular gap Detailed implementation manners

[0053] The following will disclose multiple implementation manners of the present disclosure with the accompanying drawings. For the sake of clear illustration, many practical details will be described together in the following narrative. However, it should be understood that these practical details are not used to limit the present disclosure. That is to say, in some implementation manners of the present disclosure, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional and commonly used structures and elements will be shown in a simple schematic manner in the drawings.

[0054] Please refer to Figure 1 and Figure 2 . Figure 1To illustrate a perspective view of a direct liquid pen 100 according to an embodiment of the present disclosure. Figure 2 To illustrate Figure 1 an exploded view of the direct liquid pen 100 in Figure 1 and Figure 2 As shown, the direct liquid pen 100 includes a pen tube 110, a water feeder 120, a tail sleeve 130, a liquid cartridge 200, a water supply body 140, a pen tip 150, and a pen cap 160. The water feeder 120 is accommodated in the pen tube 110. The tail sleeve 130 is detachably connected to the pen tube 110. The liquid cartridge 200 is accommodated in the tail sleeve 130 and extends into the pen tube 110. The liquid cartridge 200 is configured to hold a liquid (e.g., ink, pigment, etc.). The water supply body 140 is accommodated in the pen tube 110 and is located on a side of the water feeder 120 away from the liquid cartridge 200. The water feeder 120 is configured to drain the liquid in the liquid cartridge 200 to the water supply body 140. The pen tip 150 is disposed at one end of the pen tube 110 away from the tail sleeve 130 and penetrates into the pen tube 110 to be in fluid communication with the water supply body 140. The water supply body 140 is configured to adsorb the liquid in the liquid cartridge 200 and evenly distribute the liquid therein, so as to evenly supply the liquid to the pen tip 150. The pen cap 160 is configured to detachably connect to one end of the pen tube 110 away from the tail sleeve 130 to cover the pen tip 150 and make it not exposed.

[0055] In some embodiments, the water supply body 140 is a sponge, but the present disclosure is not limited thereto.

[0056] Please refer to Figure 3 and Figure 4 . Figure 3 To illustrate Figure 2 a perspective cross-sectional view of the plug structure 220 in Figure 4 To illustrate Figure 2 a perspective cross-sectional view of the liquid cartridge 200 in Figures 2 to 4 As shown, in the present embodiment, the liquid cartridge 200 includes a container 210 and a plug structure 220. The container 210 has an opening 211. The opening 211 faces the water feeder 120. The plug structure 220 is disposed in the container 210 and includes a cover portion 221, an elastic connecting portion 222, and an annular wall portion 223. The elastic connecting portion 222 connects the cover portion 221 on a side of the cover portion 221 away from the opening 211 and has at least one hollow portion 222a. The annular wall portion 223 connects the elastic connecting portion 222 and surrounds the cover portion 221. An annular gap G is formed between a side surface 221a of the cover portion 221 and the annular wall portion 223 and is in communication with the hollow portion 222a of the elastic connecting portion 222. The annular wall portion 223 is configured to abut against the side surface 221a of the cover portion 221 to seal the annular gap G.

[0057] Specifically, as Figure 4As shown, the annular wall portion 223 of the plug structure 220 is clamped between the inner tube surface 212 of the container 210 and the side surface 221a of the lid portion 221, so that the annular gap G is sealed. At this time, the liquid contained in the container 210 cannot flow out of the opening 211 of the container 210 through the plug structure 220. In contrast, as Figure 3 shown, when the plug structure 220 is not disposed in the container 210, the annular wall portion 223 that is not pressed and is in a natural state will be separated from the lid portion 221, thereby opening the annular gap G.

[0058] As Figure 3 and Figure 4 shown, in the present embodiment, the annular wall portion 223 has an annular flange 223a1. The annular flange 223a1 is located on the inner wall surface 223a of the annular wall portion 223. The annular wall portion 223 is configured to abut against the side surface 221a of the lid portion 221 by means of the annular flange 223a1. Through the design of the annular flange 223a1, the abutting area between the annular wall portion 223 and the lid portion 221 can be reduced and concentrated, and the abutting pressure of this abutting area can be increased, thereby improving the airtight effect.

[0059] In some embodiments, in order to further improve the airtight effect between the annular wall portion 223 and the lid portion 221. The hardness of the lid portion 221 is greater than the hardness of the annular wall portion 223. Since the harder lid portion 221 is not easily deformed when abutted by the softer annular wall portion 223, the annular gap G can be effectively prevented from being incompletely sealed.

[0060] In some embodiments, the lid portion 221 is made of a hard material, such as metal or a harder plastic material, but the present disclosure is not limited thereto. In some embodiments, the annular wall portion 223 is made of a soft material, such as a softer plastic material or rubber, but the present disclosure is not limited thereto.

[0061] As Figure 3 and Figure 4 shown, in the present embodiment, the number of the hollow portions 222a of the elastic connection portion 222 is plural. The elastic connection portion 222 includes a plurality of connection columns 222b. Both ends of each connection column 222b are respectively connected to the lid portion 221 and the annular wall portion 223. The connection columns 222b and the hollow portions 222a are alternately arranged in a ring.

[0062] As Figure 3 and Figure 4 shown, in the present embodiment, both the number of the hollow portions 222a of the elastic connection portion 222 and the number of the connection columns 222b are three, but the present disclosure is not limited thereto. In practical applications, the number of the hollow portions 222a and the number of the connection columns 222b can be increased or decreased elastically according to the elasticity of the required elastic connection portion 222.

[0063] like Figure 3 and Figure 4 As shown, in this embodiment, the elastic connection part 222 further includes a snap-fit ​​piece 222c. The same end of each connection column 222b is connected to the snap-fit ​​piece 222c. The snap-fit ​​piece 222c snaps with the bottom surface of the cover part 221. Thereby, the elastic connection part 222 can be more firmly connected to the cover part 221.

[0064] In some embodiments, the elastic connection portion 222 and the annular wall portion 223 form a single body structure. In other words, the elastic connection portion 222 and the annular wall portion 223 can be made of the same or different materials through, for example, an injection molding process. Thus, the plug structure 220 can be assembled by simply connecting the cover portion 221 with the elastic connection portion 222.

[0065] In practical applications, the cover 221, the elastic connection 222 and the annular wall 223 may also form a single body structure. In other words, the cover 221, the elastic connection 222 and the annular wall 223 may be made of the same or different materials by, for example, injection molding. In this case, the aforementioned snap-fitting piece 222c of the elastic connection 222 may be omitted.

[0066] In some embodiments, the inner tube surface 212 of the container 210 has an inwardly contracted step portion 212a. The plug structure 220 is engaged with the inwardly contracted step portion 212a. During assembly, the plug structure 220 can be inserted through the opening 211 of the container 210 and continuously moved inward until it is engaged with the inwardly contracted step portion 212a. It can be seen that the inwardly contracted step portion 212a can achieve the function of positioning the plug structure 220.

[0067] In some embodiments, the diameter of the container 210 gradually decreases from the opening 211 toward the inward step 212a. Therefore, when the plug structure 220 continues to move inward from the opening 211 of the container 210 to the inward step 212a, the annular wall portion 223 is gradually pushed toward the cover portion 221 by the inner tube surface 212 of the container 210, thereby continuously increasing the airtightness of the annular gap G.

[0068] like Figure 3 As shown, and with reference Figure 4, in the present embodiment, the annular wall portion 223 of the plug structure 220 further has at least one annular flange 223b1. The annular flange 223b1 is located on the outer wall surface 223b of the annular wall portion 223 and abuts against the inner pipe surface 212 of the container 210. The annular wall portion 223 is configured to abut against the inner pipe surface 212 of the container 210 by means of the annular flange 223b1. Through the design of the annular flange 223b1, the abutting area between the annular wall portion 223 and the container 210 can be reduced and concentrated, and the abutting pressure of this abutting area can be increased, thereby improving the airtight effect. Moreover, since the annular wall portion 223 mainly abuts against the inner pipe surface 212 of the container 210 by means of the annular flange 223b1 (rather than the entire outer wall surface 223b), the resistance of the plug structure 220 during the continuous inward movement from the opening 211 of the container 210 to the inwardly recessed step portion 212a is small. In other words, through the design of the annular flange 223b1, the plug structure 220 has the advantages of being easy to install in the container 210 and improving the airtightness with the container 210.

[0069] As Figure 3 shown, in the present embodiment, the number of the annular flanges 223b1 is three. One of the annular flanges 223b1 is close to the top of the outer wall surface 223b and is opposite to the annular flange 223a1 inside and outside, while the other two annular flanges 223b1 are adjacent to each other and close to the bottom of the outer wall surface 223b. However, the number of the annular flanges 223b1 is not limited to Figure 3 the embodiment shown. In practical applications, the number of the annular flanges 223b1 can be increased or decreased elastically according to the required airtightness.

[0070] Please refer to Figure 5 and Figure 6 . Figure 5 To illustrate Figure 1 the cross-sectional view of the direct liquid writing implement 100 in Figure 6 To illustrate Figure 5 the partial enlarged view of Figure 5 As Figure 6 and

[0071] shown, in the present embodiment, the tail sleeve 130 has not been fully assembled with the pen tube 110. Specifically, the tail sleeve 130 and the pen tube 110 are screwed together through a threaded structure. At this time, the water feeder 120 does not contact the plug structure 220. Therefore, the annular wall portion 223 clamped between the inner pipe surface 212 of the container 210 and the side surface 221a of the cover body portion 221 firmly abuts against the cover body portion 221, causing the annular gap G to be sealed.

[0071] Please refer to Figure 7 , which is another partial enlarged view of Figure 5 As Figure 7As shown, in the present embodiment, when the tail sleeve 130 and the pen tube 110 are continuously screwed together in opposite directions to complete the assembly, the water feeder 120 will push against the cover portion 221 of the plug structure 220. The pressed cover portion 221 will cause the elastic connection portion 222 to deform accordingly, and then the annular flange 223a1 of the annular wall portion 223 will separate from the side surface 221a of the cover portion 221 to open the annular gap G. At this time, the liquid contained in the container 210 can sequentially flow out to the water feeder 120 through the hollow portion 222a of the elastic connection portion 222 and the annular gap G (as Figure 7 indicated by the thick arrow in). Thus, it can be seen that when the liquid cartridge 200 is installed in the direct liquid pen 100, the water feeder 120 of the direct liquid pen 100 presses against the cover portion 221 and elastically deforms the elastic connection portion 222, causing the annular gap G to be in an open state, thereby allowing the liquid in the liquid cartridge 200 to flow to the pen tip 150 through the plug structure 220 for writing.

[0072] Conversely, when the liquid in the container 210 is used up and a new liquid cartridge 200 needs to be replaced, the tail sleeve 130 and the pen tube 110 can be moved in opposite directions to separate. During this period, the water feeder 120 will gradually move away from the plug structure 220 and separate from the cover portion 221, causing the elastic connection portion 222 to elastically recover and the cover portion 221 to return to the state of abutting against the annular flange 223a1 of the annular wall portion 223, thereby closing the annular gap G. Thereby, when the liquid cartridge 200 is taken out from the direct liquid pen 100, the remaining liquid in the liquid cartridge 200 will not leak through the plug structure 220.

[0073] From the above detailed description of the specific embodiments of the present disclosure, it can be clearly seen that in the plug structure of the present disclosure, the cover portion and the annular wall portion are connected via an elastic connection portion. When the plug structure is installed in the container of the liquid cartridge, the annular gap formed between the side surface of the cover portion and the annular wall portion will be clamped between the inner tube surface of the container and the side surface of the cover portion, causing the annular gap to be sealed. When the liquid cartridge is installed in the pen, the water feeder of the pen presses against the cover portion and elastically deforms the elastic connection portion, causing the annular gap to be in an open state, thereby allowing the liquid in the liquid cartridge to flow to the pen tip through the plug structure for writing. When the liquid cartridge is taken out from the pen, the water feeder will separate from the cover portion, causing the elastic connection portion to elastically recover and the annular gap to be in a sealed state. Thereby, the problem of liquid leakage during the replacement of the liquid cartridge can be effectively avoided.

[0074] Although the present disclosure has been disclosed as above in embodiments, it is not intended to limit the present disclosure. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be defined by the appended claims.

Claims

1. A plug structure, characterized in that, Comprising: A cover body part; An elastic connecting part, connecting the cover body part and having at least one hollow part; and An annular wall part, connecting the elastic connecting part and surrounding the cover body part, wherein an annular gap is formed between a side surface of the cover body part and the annular wall part and is communicated with the hollow part, and the annular wall part is configured to abut against the side surface to seal the annular gap.

2. The plug structure according to claim 1, characterized in that, The annular wall part has at least one annular flange, the at least one annular flange is located on an inner wall surface of the annular wall part, and the annular wall part is configured to abut against the side surface of the cover body part by means of the at least one annular flange.

3. The plug structure according to claim 2, wherein, The cover body part is configured to be pressed to deform the elastic connecting part, thereby separating the at least one annular flange from the side surface of the cover body part to open the annular gap.

4. The plug structure according to claim 1, characterized in that, The number of the at least one hollow part is multiple, the elastic connecting part includes multiple connecting columns, each of the multiple connecting columns is connected to the cover body part and the annular wall part at both ends respectively, and the multiple connecting columns and the multiple hollow parts are arranged alternately in a ring shape.

5. The plug structure according to claim 1, characterized in that, The elastic connecting part includes a clamping piece, and the clamping piece is clamped with the bottom surface of the cover body part.

6. The plug structure according to claim 1, characterized in that, The elastic connecting part and the annular wall part form a single structure.

7. The plug structure according to claim 1, characterized in that, The hardness of the cover body part is greater than the hardness of the annular wall part.

8. A liquid cartridge, characterized in that, Comprising: A container having an opening; and A plug structure disposed in the container and comprising: A cover body part; An elastic connecting part, connecting the cover body part on a side of the cover body part away from the opening and having at least one hollow part; and An annular wall part, connecting the elastic connecting part and surrounding the cover body part, wherein an annular gap is formed between a side surface of the cover body part and the annular wall part and is communicated with the hollow part, and the annular wall part is clamped between an inner pipe surface of the container and the side surface of the cover body part, so that the annular gap is sealed.

9. The liquid cartridge according to claim 8, wherein, The annular wall part has at least one annular flange, and the at least one annular flange is located on an outer wall surface of the annular wall part and abuts against the inner pipe surface of the container.

10. The liquid cartridge according to claim 8, wherein, The inner pipe surface of the container has a retracted step part, and the plug structure is clamped with the retracted step part.

11. The liquid cartridge according to claim 10, wherein, The caliber of the container gradually shrinks from the opening towards the retracted step part.

12. A writing instrument, characterized in that, Comprising: A pen tube; A water feeder accommodated in the pen tube; A tail sleeve detachably connected to the pen tube; and A liquid cartridge accommodated in the tail sleeve and extending into the pen tube, the liquid cartridge includes a container and a plug structure, the container has an opening, the plug structure is disposed in the container and comprises: A cover body part; An elastic connecting part, connecting the cover body part on a side of the cover body part away from the opening and having at least one hollow part; and An annular wall part, connecting the elastic connecting part and surrounding the cover body part, wherein an annular gap is formed between a side surface of the cover body part and the annular wall part and is communicated with the hollow part, and the water feeder presses against the cover body part, so that the annular gap is opened.

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