CN215970820U - Integrated plastic water storage core and core assembly - Google Patents
Integrated plastic water storage core and core assembly Download PDFInfo
- Publication number
- CN215970820U CN215970820U CN202121964712.7U CN202121964712U CN215970820U CN 215970820 U CN215970820 U CN 215970820U CN 202121964712 U CN202121964712 U CN 202121964712U CN 215970820 U CN215970820 U CN 215970820U
- Authority
- CN
- China
- Prior art keywords
- area
- diversion
- ink storage
- section
- ink
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Pens And Brushes (AREA)
Abstract
The utility model discloses an integrated plastic water storage core and a pen core assembly. The integrated plastic water storage core is arranged in a segmented mode, ink can be guided to flow while being stored, a cotton core is not needed, production control is facilitated, production precision is improved, the cotton core is not needed, production control is facilitated, production precision is improved, a positioning area is arranged, the distance between the head of the flow guide section and a ball of a pen point can be controlled, installation precision is improved, and smoothness of ink output writing is guaranteed.
Description
Technical Field
The utility model belongs to the field of stationery, and relates to an integrated plastic water storage core and a pen core assembly.
Background
The water pen with ball-point pen head and ink-sucking-free pen core is widely used owing to its features of convenience, cleanness and fluent writing. The pen core is internally provided with a water leading core, the rear end of the water leading core extends into the ink bin, the front end of the water leading core is inserted into the pen head, and when the pen is used, ink in the ink bin can be led into the ball pen head through the water leading core.
The existing water diversion core for the water pen is usually a cotton core type water diversion core, and the water diversion core and the water outlet ball are assembled for use. When the pen is used, the ink is guided to the front end from the rear end by the water guide core and then conveyed into the ball-point pen head to finish writing.
But because the size of the cotton core is difficult to be stably controlled in the preparation process, the tolerance is about +/-0.5 mm and reaches 1/2 with the specified diameter, the tolerance of the finished product is larger; and the cotton core is soft in texture, and the size requirement is difficult to control in the assembly process. In the assembling process, after the cotton core is required to be arranged in the pen point, the smoothness of ink output writing can be ensured only if the distance between the head of the cotton core and the ball is 0.1-0.2mm, and the problem that the pen point cannot write due to the fact that the cotton core props against the ball or the distance exceeds 0.2mm easily occurs in the control of the automatic assembling process.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems of low precision and difficult assembly of cotton cores, the utility model provides an integrated plastic water storage core and a pen core assembly.
The utility model aims to provide an integrated plastic water storage core, which adopts the following technical scheme:
an integrated plastic water storage core comprises a diversion area, an ink storage area, a positioning area, a diversion area and a diversion channel;
one end of the flow guide area is used for being connected with the matched plastic pen point, and the other end of the flow guide area is connected with the ink storage area;
one end of the ink storage area, which is far away from the flow guiding area, is connected with the flow guiding area through a positioning area;
the diversion trench is arranged on the diversion region, the ink storage region, the positioning region and the diversion region, the ink storage region, the positioning region and the diversion region are communicated with each other through the diversion trench.
Preferably, the flow guide area, the ink storage area, the flow guide area, the positioning area and the water guide groove are integrally formed.
Preferably, the diversion area consists of a diversion section and a diversion ring;
the guide ring is arranged along the surface of the guide section;
the size of the flow guide section is matched with that of the ink inlet end of the pen head.
Preferably, the ink storage area comprises an ink storage section, an ink storage ring and an ink sealing ring;
one end of the ink storage section is connected with the flow guide section of the flow guide section, the other end of the ink storage section is connected with an ink sealing ring, and one end, far away from the ink storage section, of the ink sealing ring is connected with the positioning area.
Preferably, the ink storage ring is an annular groove formed in the ink storage section, and the ink storage ring is arranged along the circumferential direction of the ink storage section;
the ink storage rings are arranged in a plurality and are dispersed on the ink storage section at intervals;
the width of the ink storage ring is larger than that of the water diversion groove, and the depth of the ink storage ring is smaller than that of the water diversion groove.
Preferably, the drainage zone comprises a drainage segment and a guide segment;
one end of the drainage end is connected with the positioning area;
the guiding section is connected with one end of the drainage section, which is far away from the positioning area;
the side surfaces of the guide section and the drainage section are both composed of arc surfaces and rectangular surfaces, and the drainage grooves are formed in the rectangular surfaces of the guide section and the drainage section.
Preferably, the diversion channel is arranged along the height direction of the diversion area, the ink storage area, the diversion area and the positioning area;
the diversion groove is perpendicular to the diversion ring, the ink sealing ring and the ink storage ring.
Preferably, the water diversion grooves are distributed at the positions of the flow guiding area, the ink storage area, the flow guiding area and the positioning area in different groove depths, but the groove widths distributed at the positions of the flow guiding area, the ink storage area, the flow guiding area and the positioning area are the same.
The utility model also comprises a pen core assembly which comprises the integrated plastic water storage core, the adaptive plastic pen point and the ball which can be rotatably loaded at the writing end of the plastic pen point, wherein the plastic pen point is adaptive to the flow guide area of the integrated plastic water storage core.
Preferably, the pen point is made of POM materials;
the integrated plastic water storage core is made of ABS material.
The utility model can bring the following beneficial effects:
1) the integrated plastic water storage core is arranged in a segmented mode, ink can be guided to flow when ink is stored, a cotton core is not needed, production control is facilitated, production accuracy is improved, the water storage core can only be matched with the plastic pen point, and the problems of water leakage, slow water outlet, unsmooth writing and the like caused by connection with a metal pen point are solved.
2) According to the integrated plastic water storage core, the ink storage section, the ink storage ring and the ink sealing section are arranged, so that after ink flows into the flow guide area through the ink storage area, the ink can be stored in the pen head without flowing back due to the siphon effect of the capillary holes, and the writing effect of the pen is guaranteed.
3) According to the utility model, through the arrangement of the positioning area, the distance between the head of the flow guide section and the ball of the pen point can be controlled, the distance between the flow guide section and the ball of the pen point is ensured to be within 0.1-0.2mm, the mounting precision is improved, and the smoothness of ink-out writing is ensured.
(4) Compared with the metal pen point in the prior art, the metal pen point has better matching effect with the integrated plastic water storage core, can be tightly connected, and avoids water leakage; meanwhile, the plastic pen point made of the plastic material has the advantages of fast and smooth water outlet, smooth writing, no paper jam feeling of the metal pen point, no contact with air to generate reflection, long uncapping time and the like.
Drawings
The above features, technical features, advantages and modes of realisation of the present invention will be further described in the following detailed description of preferred embodiments thereof, which is to be read in connection with the accompanying drawings.
FIG. 1 is a schematic structural view of an integral plastic water storage core of the present invention;
FIG. 2 is a schematic view of the flow guide area and the ink storage area of the integrated plastic water storage core of the present invention;
FIG. 3 is a schematic view of the diversion area of the integrated plastic water storage core according to the present invention;
FIG. 4 is a schematic view of the integrated plastic water storage core and the pen tip according to the present invention;
FIG. 5 is a schematic view of the combination of the integrated plastic water storage core and the pen tip.
The reference numbers illustrate:
1-a flow guide zone; 11-a flow guide section; 12-a flow guide ring; 2-ink storage area; 21-ink storage section; 22-ink storage ring; 23-ink sealing ring; 3-a positioning zone; 4-a drainage zone; 41-a drainage section; 42-a guide segment; 5-a water diversion groove; 6-plastic pen point.
Detailed Description
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the utility model, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product.
As shown in fig. 1, the integral plastic water storage core comprises a flow guide area 1, an ink storage area 2, a positioning area 3, a flow guide area 4 and a water guide groove 5, wherein one end of the flow guide area 1 is connected with a plastic pen point 6 which is matched with the flow guide area 1, the other end of the flow guide area 1 is connected with the ink storage area 2, and one end of the ink storage area 2, which is far away from the flow guide area 1, is connected with the flow guide area 4 through the positioning area 3. The diversion groove 5 is arranged on the diversion area 1, the ink storage area 2, the positioning area 3 and the diversion area 4, and the diversion area 1, the ink storage area 2, the positioning area 3 and the diversion area 4 are communicated with each other through the diversion groove 5.
The diversion area 1, the ink storage area 2, the diversion area 4, the positioning area 3 and the diversion groove 5 are all prepared by an integral forming process, exemplarily, the diversion area can be integrally prepared by an injection molding process, and the integral forming process omits the assembly process of a cotton core and ink, is beneficial to production and is beneficial to improving the stability of the product quality of the water storage core.
As shown in fig. 2, the flow guiding region 1 is composed of a cylindrical flow guiding section 11 and a flow guiding ring 12, wherein the flow guiding section 11 is a main body of the flow guiding region 1, and the flow guiding ring 12 is an annular groove. The guide ring 12 is arranged on the surface of the guide section 11, and particularly, a circle is arranged in the middle of the guide section 11 along the circumferential direction, so that the guide section 11 can store ink conveniently, and meanwhile, the ink flow speed of the guide area 1 is adjusted, and the stable writing of the plastic pen point 6 is ensured.
The diameter of the flow guide section 11 is the same as the inner diameter of the ink inlet end of the plastic pen point 6, so that the flow guide section 1 is tightly matched with the plastic pen point 6. In order to facilitate the installation of the pen core, the diameter of one end, close to the plastic pen point 6, of the flow guide area 1 is gradually reduced, the diameter of the end, close to the plastic pen point 6, of the flow guide area 1 is relatively smaller, and therefore the ink inlet end of the plastic pen point 6 can be accurately inserted in the installation process.
The diversion trench 5 located in the diversion area 1 is arranged on the outer surface of the diversion section 11, and specifically, the diversion trench 5 is arranged along the height direction of the diversion section 11, namely, is arranged perpendicular to the diversion ring 12. The length of the diversion groove 5 of the diversion area 1 is the same as that of the diversion section 11, so that ink in the diversion area 1 can smoothly enter the plastic pen point 6 through the diversion groove 5, and the depth of the diversion groove 5 is larger than that of the diversion ring 12, so that the ink is prevented from being retained in the diversion ring 12.
As shown in fig. 2, the ink storage section 2 includes an ink storage section 21, an ink storage ring 22, and an ink sealing ring 23, the ink storage section 21 and the ink sealing ring 23 are main bodies of the ink storage section 2, one end of the ink storage section 21 is connected to the flow guiding section 11, the other end of the ink storage section 21 is connected to the ink sealing ring 23, and one end of the ink sealing ring 23 away from the ink storage section 21 is connected to the positioning section 3.
The ink storage section 21 may be cylindrical, the ink storage ring 22 is an annular groove formed on the ink storage section 21, and the ink storage ring 22 is disposed along the circumferential direction of the ink storage section 21. The ink storage rings 22 are provided in plural, and the plural ink storage rings 22 are dispersed at intervals on the ink storage section 21.
The number of the ink storage rings 22 is specifically determined according to the height of the ink storage section 21, so that the ink storage rings 22 can be arranged at intervals, and the requirement of the ink storage amount is met.
The bottom surface of the ink sealing ring 23 is the same as the bottom surface of the ink storage section 21, that is, the ink sealing ring 23 is cylindrical, the diameter of the ink sealing ring 23 is the same as that of the ink storage section 21, and one of the ink storage rings 22 is arranged at the edge of the ink sealing ring 23 close to the ink storage section 21.
The diameter of the ink storage section 21 is 1.5-3 times of the diameter of the flow guide section 11, the joint of the ink storage section 21 and the flow guide section 11 is a smooth arc surface, and the ink storage section 21 and the flow guide section 11 are smoothly transited through arc surface connection, so that dead angle overstock ink is avoided.
The width of the ink storage ring 22 is larger than the width of the water diversion groove 5, and the depth of the ink storage ring 22 is smaller than the depth of the water diversion groove 5, so that the ink storage amount of the ink storage ring 22 is ensured, and meanwhile, the ink in the ink storage ring 22 is promoted to automatically flow into the water diversion groove 5.
The diversion groove 5 located in the ink storage area 2 is also arranged on the outer surface of the diversion section 11, and specifically, the diversion groove 5 is arranged along the height direction of the diversion section 11, namely, is arranged perpendicular to the ink storage ring 22.
The diversion area 1 diversion groove 5 and the ink storage area 2 diversion groove 5 are located on the same straight line, namely the diversion area 1 and the ink storage area 2 are communicated with each other through the diversion groove 5.
Through the arrangement of the ink storage section 21, the ink storage ring 22 and the ink sealing ring 23, after the ink flows into the flow guide area 1 through the ink storage area 2, the ink can be stored in the plastic pen head 6 without flowing backwards due to the siphon effect of the capillary holes of the flow guide area 1, so that the writing effect of the pen is ensured.
As shown in fig. 2, the positioning region 3 is connected to a section of the ink sealing ring 23 away from the drainage region 4, the positioning region 3 may be cylindrical, and the diameter of the positioning region 3 is 1.2-2 times of the diameter of the ink storage section 21.
The diversion groove 5 located in the positioning area 3 is arranged in the height direction of the positioning area 3 and is located on the same straight line with the diversion groove 5 of the ink storage area 2, so that the positioning area 3 is communicated with the ink storage area 2.
As shown in fig. 3, the drainage area 4 is disposed on a side of the positioning area 3 away from the ink storage area 2, and the drainage area 4 includes a drainage segment 41 and a guide segment 42. The drainage end is connected with the positioning area 3, and the guiding section 42 is connected with one end of the drainage section 41 far away from the positioning area 3.
The guide section 42 is semi-cylindrical, the side surface of the guide section 42 is composed of a circular arc surface and a rectangular surface, and the circle centers of two contact surfaces connected with the positioning area 3 and the guide section 42 are overlapped. Illustratively, the circle center angle of the arc surface of the guide section 42 is 200-300 degrees, and the ground semicircle diameter of the guide section 42 is 0.5-0.9 times of the diameter of the positioning area 3.
The drainage section 41 is nearly cylindrical, the side surface of the drainage section 41 consists of a circular arc surface and a rectangular surface, and the rectangular surface of the drainage section 41 and the rectangular surface of the guide section 42 are positioned on the same plane.
Illustratively, the circle center angle of the arc surface is 270 degrees to 320 degrees, and the diameter of the drainage section 41 is 0.3 to 0.8 time of that of the guide section 42.
The diversion channel 5 positioned in the diversion area 4 is arranged in the height direction of the guide section 42 and the diversion end and is positioned on a straight line with the diversion channel 5 of the positioning area 3, so that the diversion area 4 is communicated with the positioning area 3. Specifically, the flume 5 located in the diversion area 4 is opened on the rectangular planes of the guide section 42 and the diversion section 41.
Because the diameters and the shapes of the diversion area 1, the ink storage area 2, the positioning area 3 and the diversion area 4 are different, but the bottoms of the diversion grooves 5 are all on the same plane, the diversion grooves 5 in different areas have different depths. The diversion grooves 5 are specifically formed according to the diameter and the shape of the area, so that the two side surfaces of each diversion groove are respectively positioned on the same plane, and the bottoms of the diversion grooves are also positioned on the same plane, namely the diversion grooves 5 in different areas have the same width and different depth.
In the integrated plastic water storage core of the embodiment, the ink flows into the drainage section 41 from the guide section 42, enters the positioning area 3 and the ink storage section 21 through the diversion groove 53, and then enters the diversion section 11, and the ink immediately enters the plastic pen point 6 because the diversion section 11 is inserted in the plastic pen point 6. When the ink passes through the guide ring 12, a part of the ink is gathered at the guide ring 12, and when the ink flows into a certain amount, the ink flows onto the ball of the plastic pen point 6 through the guide section, so that the writing can be realized.
The effect of locating area 3 is the distance between 11 heads of control water conservancy diversion section to the 6 balls of plastics nib in this embodiment, because 4 diameters in locating area are great, moreover, the steam generator is simple in structure, length is easy to control, through locating area 4 through the whole length of extension or shortening the easy control water storage core, guarantee that water conservancy diversion section 11 can insert in the plastics nib 6, the mechanical clamp of being convenient for simultaneously in the installation is got, guarantee that the distance of water conservancy diversion section 11 and the 6 balls of plastics nib is in 0.1-0.2mm, guarantee out the ink and write the smoothness.
In this embodiment, the shapes of the flow guiding section 11, the ink storing section 21, the positioning section 3, the guiding section 42 and the flow guiding section 41 are not limited to the listed cylinders or semi-cylinders, and all shapes can realize the functions of connecting the sections and communicating and flowing ink.
The integrated plastic water storage core is prepared from a plastic material, the plastic material can be suitable for various integrated forming processes, and preferably, the plastic material is an ABS material. For the water storage core of metal material, adopt the plastics material can provide sufficient tension for the ink, the ink storage of being convenient for, give the certain sliding action of ink through the design of diversion district 1, storage ink district 2 and drainage groove 5 again simultaneously to guarantee that the water storage core had both had sufficient ink reserve capacity, can go out the water again stably, improve writing effect.
The utility model also comprises a pen core component which comprises the integrated plastic water storage core and the plastic pen point 6 matched with the water storage core, and as shown in figure 4, the plastic pen point 6 comprises an ink inlet end and a writing end. The ink inlet end is tightly matched with the flow guide area 1 and the ink storage area 2, namely the flow guide area 1 and the ink storage area 2 enter from the ink inlet end and are inserted into the plastic pen point 6. The writing end of the plastic pen point 6 is internally provided with a steel ball which can be made of hard alloy balls or ceramic balls. The plastic pen point 6 is matched with the integrated plastic water storage core of the utility model as shown in figure 5.
The plastic pen point 6 matched with the integrated plastic water storage core is made of plastic materials, different plastics can be adopted for the plastic pen point and the water storage core, and the plastic pen point 6 is preferably made of pom materials, namely polyformaldehyde thermoplastic crystalline polymer. Compared with a metal pen point in the prior art, the plastic pen point 6 arranged in plastic has a better matching effect with the integrated plastic water storage core, can be tightly connected and avoids water leakage; meanwhile, the plastic pen point 6 made of the plastic material has the advantages of fast and smooth water outlet, smooth writing, no paper jam feeling of the metal pen point, no reaction caused by contact with air, long uncapping time and the like.
It should be noted that the above embodiments can be freely combined as required, and further description is omitted here for many other combinations. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides an integral type plastics water storage core which characterized in that:
comprises a diversion area, an ink storage area, a positioning area, a diversion area and a diversion trench;
one end of the flow guide area is used for being connected with the matched plastic pen point, and the other end of the flow guide area is connected with the ink storage area;
one end of the ink storage area, which is far away from the flow guiding area, is connected with the flow guiding area through a positioning area;
the diversion trench is arranged on the diversion region, the ink storage region, the positioning region and the diversion region, the ink storage region, the positioning region and the diversion region are communicated with each other through the diversion trench.
2. The unitary plastic water storage cartridge of claim 1, wherein:
the diversion area, the ink storage area, the diversion area, the positioning area and the water diversion groove are integrally formed.
3. The unitary plastic water storage cartridge of claim 1, wherein:
the diversion area consists of a diversion section and a diversion ring;
the guide ring is arranged along the surface of the guide section;
the size of the flow guide section is matched with that of the ink inlet end of the pen head.
4. The unitary plastic water storage cartridge of claim 1, wherein:
the ink storage area comprises an ink storage section, an ink storage ring and an ink sealing ring;
one end of the ink storage section is connected with the flow guide section of the flow guide section, the other end of the ink storage section is connected with an ink sealing ring, and one end, far away from the ink storage section, of the ink sealing ring is connected with the positioning area.
5. The unitary plastic water storage cartridge of claim 4, wherein:
the ink storage ring is an annular groove formed in the ink storage section, and is arranged along the circumferential direction of the ink storage section;
the ink storage rings are arranged in a plurality and are dispersed on the ink storage section at intervals;
the width of the ink storage ring is larger than that of the diversion channel, and the depth of the ink storage ring is smaller than that of the diversion channel.
6. The unitary plastic water storage cartridge of claim 1, wherein:
the drainage area comprises a drainage section and a guide section;
one end of the drainage section is connected with the positioning area;
the guiding section is connected with one end of the drainage section, which is far away from the positioning area;
the side surfaces of the guide section and the drainage section are both composed of arc surfaces and rectangular surfaces, and the water diversion grooves are formed in the rectangular surfaces of the guide section and the drainage section.
7. The unitary plastic water storage cartridge of claim 3, wherein:
the diversion channel is arranged along the height direction of the diversion area, the ink storage area, the diversion area and the positioning area;
the diversion groove is perpendicular to the diversion ring, the ink sealing ring and the ink storage ring.
8. An integral plastic water storage core as defined in claim 1 or 7, wherein:
the water diversion grooves are distributed in the positions of the flow diversion area, the ink storage area, the flow diversion area and the positioning area, and have different groove depths, but the groove widths distributed in the positions of the flow diversion area, the ink storage area, the flow diversion area and the positioning area are the same.
9. A pen core assembly, comprising:
the plastic pen point comprises the integrated plastic water storage core, a matched plastic pen point and a ball bearing which is rotatably loaded at the writing end of the plastic pen point, wherein the plastic pen point is matched with the flow guide area of the integrated plastic water storage core.
10. The cartridge assembly of claim 9, wherein:
the plastic pen point is made of POM material;
the integrated plastic water storage core is made of ABS material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121964712.7U CN215970820U (en) | 2021-08-20 | 2021-08-20 | Integrated plastic water storage core and core assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121964712.7U CN215970820U (en) | 2021-08-20 | 2021-08-20 | Integrated plastic water storage core and core assembly |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215970820U true CN215970820U (en) | 2022-03-08 |
Family
ID=80580050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121964712.7U Active CN215970820U (en) | 2021-08-20 | 2021-08-20 | Integrated plastic water storage core and core assembly |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215970820U (en) |
-
2021
- 2021-08-20 CN CN202121964712.7U patent/CN215970820U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR101207222B1 (en) | Applicator tip method of producing applicator tip and applicator | |
| CN102848793B (en) | Needle tubing spring pen point and ball-point pen cartridge comprising same | |
| US4457644A (en) | Ball-point pen tip | |
| CN215970820U (en) | Integrated plastic water storage core and core assembly | |
| US4384800A (en) | Ball holder for ball point pen | |
| CN110497713B (en) | Method for processing pen point of water pen | |
| JP2005324336A (en) | Ink tank interchanging type writing utensil | |
| CN201721172U (en) | Fountain writing brush | |
| JPS5924556Y2 (en) | Tip of water-based ballpoint pen | |
| CN217574646U (en) | Pen core and pen | |
| JPS641101Y2 (en) | ||
| CN212959954U (en) | Valve ball of ball valve | |
| CN102514418B (en) | A kind of needle-shaped water soluble ball point pen point | |
| CN2191765Y (en) | Ink reservoir sturcture for ball-point pen | |
| CN217124371U (en) | Refill and pen | |
| CN220095991U (en) | Straight liquid type soft-head drawing pen | |
| JPS6241829Y2 (en) | ||
| CN2900184Y (en) | Refill of water-based writing pen | |
| CN220262451U (en) | Ball pen | |
| JP4706992B2 (en) | Liquid supply and nib or pen lead | |
| CN216545440U (en) | Environmental protection fiber construction for refill | |
| CN117597239B (en) | Liquid supply body and coating tool provided with same | |
| CN212678575U (en) | Direct liquid type liquid eyeliner cosmetic pencil | |
| JPH0333506Y2 (en) | ||
| CN2385892Y (en) | Ball-pen of writing smoothly |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |