Plug structure, liquid box and pen

Abstract

The utility model 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 utility model relates to a plug structure, a liquid cartridge and a writing instrument. Background Art

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

[0003] However, when the ink is used up and the liquid cartridge needs to be replaced, the opening of the existing liquid cartridge has no 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 propose a plug structure, a liquid cartridge and a direct liquid writing instrument that can solve the above problems is one of the problems that the industry is eager to invest in research and development resources to solve at present. Summary of the Utility Model

[0005] In view of this, an object of the present utility model is to propose a plug structure, a liquid cartridge and a writing instrument that can solve the above problems.

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

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

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

[0009] In one or more embodiments of the present utility model, the number of the hollow parts is multiple. The elastic connection part includes multiple connecting columns. The two ends of each connecting column are respectively connected to the cover part and the annular wall part. The connecting columns and the hollow parts are alternately arranged in a ring.

[0010] In one or more embodiments of the present utility model, the elastic connection part includes a clamping piece. The clamping piece is clamped with the bottom surface of the cover body part.

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

[0012] In one or more embodiments of the present utility model, the hardness of the cover body part is greater than the hardness of the annular wall part.

[0013] To achieve the above object, according to an embodiment of the present utility model, 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 body part, an elastic connection part, and an annular wall part. The elastic connection part is connected to the cover body part on a side of the cover body part away from the opening and has at least one hollow part. The annular wall part is connected to the elastic connection part and surrounds the cover body part. An 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 annular wall part is clamped between the inner tube surface of the container and the side surface of the cover body part, so that the annular gap is sealed.

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

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

[0016] In one or more embodiments of the present utility model, the caliber of the container gradually decreases from the opening towards the retracted step part.

[0017] To achieve the above object, according to an embodiment of the present utility model, 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 body part, an elastic connection part, and an annular wall part. The elastic connection part is connected to the cover body part on a side of the cover body part away from the opening and has at least one hollow part. The annular wall part is connected to the elastic connection part and surrounds the cover body part. An 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 feeder presses against the cover body part, so that the annular gap is opened.

[0018] In summary, in the plug structure of the present utility model, the cover body 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 body portion and the annular wall portion is clamped between the inner tube surface of the container and the side surface of the cover body portion, resulting in the sealing of the annular gap. When the liquid cartridge is installed in the writing instrument, the water feeder of the writing instrument presses against the cover body portion and causes the elastic connection portion to elastically deform, resulting in the opening of the annular gap, 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 removed from the writing instrument, the water feeder separates from the cover body portion, causing the elastic connection 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 utility model, the technical means for solving the problems, and the effects produced thereby. The specific details of the present utility model will be introduced in detail in the following embodiments and related drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the above and other objects, features, advantages and embodiments of the present utility model more obvious and understandable, the description of the accompanying drawings is as follows:

[0021] Figure 1 FIG. 12 is a perspective view of a direct liquid writing instrument according to an embodiment of the present utility model;

[0022] Figure 2 FIG. 16 is a Figure 1 exploded view of the direct liquid writing instrument in FIG. 12;

[0023] Figure 3 FIG. 22 is a Figure 2 stereoscopic cross-sectional view of the plug structure in FIG. 18;

[0024] Figure 4 FIG. 28 is a Figure 2 stereoscopic cross-sectional view of the liquid cartridge in FIG. 24;

[0025] Figure 5 FIG. 34 is a Figure 1 cross-sectional view of the direct liquid writing instrument in FIG. 30;

[0026] Figure 6 FIG. 40 is a Figure 5 partial enlarged view of FIG. 36;

[0027] Figure 7 FIG. 46 is a Figure 5 another partial enlarged view of FIG. 36.

[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 portion

[0043] 221a: Side surface

[0044] 222: Elastic connection portion

[0045] 222a: Hollowed-out portion

[0046] 222b: Connection column

[0047] 222c: Engaging piece

[0048] 223: Annular wall portion

[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 utility model with reference to the 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 utility model. That is to say, in some implementation manners of the present utility model, these practical details are not necessary. In addition, for the purpose of simplifying the drawings, some conventional 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 the direct liquid pen 100 according to an embodiment of the present utility model. 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 received in the pen tube 110. The tail sleeve 130 is detachably connected to the pen tube 110. The liquid cartridge 200 is received 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 received 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 utility model 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, causing the annular gap G to be 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 provided 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 invention 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 invention is not limited thereto.

[0061] As Figure 3 and Figure 4 shown, in the present embodiment, the number of 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 hollow portions 222a of the elastic connection portion 222 and the number of connection columns 222b are three, but the present invention is not limited thereto. In practical applications, the number of hollow portions 222a and the number of connection columns 222b can be elastically increased or decreased according to the required elasticity of the elastic connection portion 222.

[0063] like Figure 3 and Figure 4 As shown, in this embodiment, the elastic connection portion 222 further includes a snap-fit piece 222c. The same end of each connecting column 222b is connected to the snap-fit piece 222c. The snap-fit piece 222c snaps into engagement with the bottom surface of the cover portion 221. This allows the elastic connection portion 222 to be more securely connected to the cover portion 221.

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

[0065] In practical applications, the cover portion 221, the elastic connection portion 222, and the annular wall portion 223 may also form a single unitary structure. In other words, the cover portion 221, the elastic connection portion 222, and the annular wall portion 223 may be made of the same or different materials, for example, through an injection molding process. In this case, the aforementioned engaging piece 222c of the elastic connection portion 222 may be omitted.

[0066] In some embodiments, the inner tube surface 212 of the container 210 has an inwardly tapered step 212a. The plug structure 220 engages with the inwardly tapered step 212a. During assembly, the plug structure 220 can be inserted through the opening 211 of the container 210 and continuously moved inward until it engages with the inwardly tapered step 212a. Thus, the inwardly tapered step 212a serves to position the plug structure 220.

[0067] In some embodiments, the diameter of the container 210 gradually decreases from the opening 211 toward the inwardly tapered step 212a. Therefore, as the stopper structure 220 continues to move inward from the opening 211 of the container 210 to the inwardly tapered step 212a, the annular wall 223 is gradually pushed toward the cover 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 this 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 tube surface 212 of the container 210. The annular wall portion 223 is configured to abut against the inner tube 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 tube surface 212 of the container 210 with the annular flange 223b1 (not the entire outer wall surface 223b), the plug structure 220 has less resistance during the continuous inward movement from the opening 211 of the container 210 to the inward shrinking step portion 212a. 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 this 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}2]]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 And Figure 6 shown, in this 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 tube 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 to illustrate Figure 5 another partial enlarged view of Figure 7As shown, in the present embodiment, when the tail sleeve 130 and the pen tube 110 are continuously screwed together in opposite directions for complete assembly, the water guide 120 will push against the cover portion 221 of the plug structure 220. The pressed cover portion 221 will cause the elastic connecting portion 222 to deform accordingly, and then the annular flange 223a1 of the annular wall portion 223 will be separated 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 guide 120 through the hollow portion 222a of the elastic connecting portion 222 and the annular gap G (such as the path indicated by the thick arrow in Figure 7 ). It can be seen from this that when the liquid cartridge 200 is installed in the direct liquid pen 100, the water guide 120 of the direct liquid pen 100 presses against the cover portion 221 and elastically deforms the elastic connecting portion 222, causing the annular gap G to be in an open state, so that the liquid in the liquid cartridge 200 can flow through the plug structure 220 to the pen tip 150 for writing.

[0072] On the contrary, 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 the reverse direction to separate. During this period, the water guide 120 will gradually move away from the plug structure 220 and separate from the cover portion 221, causing the elastic connecting 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. Thus, when the liquid cartridge 200 is taken out of 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 invention, it can be clearly seen that in the plug structure of the present invention, 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, causing the annular gap to be sealed. When the liquid cartridge is installed in the pen, the water guide of the pen presses against the cover portion and elastically deforms the elastic connecting portion, causing the annular gap to be in an open state, so that the liquid in the liquid cartridge can flow through the plug structure to the pen tip for writing. When the liquid cartridge is taken out of the pen, the water guide will separate 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 can be effectively avoided when replacing the liquid cartridge.

[0074] Although the present invention has been disclosed as above in the embodiments, it is not intended to limit the present invention. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the scope 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 one 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, characterized in that, The cover body part is configured to be pressed to deform the elastic connecting part, and further separate 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, wherein, The number of the at least one hollow part is multiple, the elastic connecting part comprises multiple connecting columns, two ends of each of the multiple connecting columns are respectively connected to the cover body part and the annular wall part, and the multiple connecting columns and the multiple hollow parts are alternately arranged in a ring.

5. The plug structure according to claim 1, wherein The elastic connecting part comprises 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 body structure.

7. The plug structure according to claim 1, characterized in that, The hardness of the cover body part is greater than that 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 one 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, characterized in that, The inner pipe surface of the container has a constricted step part, and the plug structure is clamped to the constricted step part.

11. The liquid cartridge according to claim 10, characterized in that, The caliber of the container gradually decreases from the opening towards the constricted 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 comprising a container and a plug structure, the container having an opening, the 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 one 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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