CN213056498U - Intelligent pen capable of preventing ink leakage of pen refill - Google Patents
Intelligent pen capable of preventing ink leakage of pen refill Download PDFInfo
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- CN213056498U CN213056498U CN202021489735.2U CN202021489735U CN213056498U CN 213056498 U CN213056498 U CN 213056498U CN 202021489735 U CN202021489735 U CN 202021489735U CN 213056498 U CN213056498 U CN 213056498U
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Abstract
The utility model discloses a prevent intelligent pen that refill ink revealed, this intelligent pen's penholder is equipped with the installation cavity, and the installation cavity is located to image acquisition subassembly, refill and elastic component. When the intelligent pen is used for writing, the pen core moves towards one side of the image acquisition assembly under the action of pressure and triggers the image acquisition assembly, and the image acquisition assembly correspondingly identifies and acquires characters, images and symbols on a paper surface; when the pen is in a non-writing state, the pen core moves away from one side of the image acquisition assembly under the action of elastic force of the elastic part, so that the pen core can be prevented from continuously triggering the image acquisition assembly or the pen core cannot be restored to the initial position, and acquisition of the image acquisition assembly is influenced. The beneficial effects of the utility model are that prevent that the ink of refill the inside from revealing.
Description
Technical Field
The utility model relates to a technical field is write to intelligence, in particular to prevent intelligent pen that refill ink revealed.
Background
With the development of science and technology, various intelligent devices appear like bamboo shoots in the spring after rain, the traditional habits of people are profoundly changed, people rely on various intelligent devices more and more, and the electronization of files meets greater and greater requirements, so that various intelligent pens are used for writing or drawing on traditional paper or a blackboard or an object, writing or drawing on a touch display screen or a touch screen, displaying on the touch display screen or the display screen, and storing electronic files.
In the related art, because the pen cap is directly covered on the pen body, a soft body is arranged between the pen core and the pen cap, but the ink in the pen core cannot be prevented from leaking to influence the writing experience.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an intelligence pen, the in-process refill that aims at avoiding writing rocks to improve image acquisition and discernment's stability.
In order to achieve the above object, the utility model provides an intelligent pen, include:
the pen rack is provided with an installation cavity for accommodating a pen core;
the image acquisition assembly is arranged in the installation cavity; and
the elastic piece is arranged in the mounting cavity and elastically abutted against the pen core, the pen core can move towards one side of the image acquisition assembly under the action of external force and trigger the image acquisition assembly, and the elastic piece provides elastic force to enable the pen core to move towards one side far away from the image acquisition assembly and abut against the cavity side wall of the mounting cavity.
The pen cap is internally provided with a pen core cover, one end of the pen core cover is connected in the pen cap, the other end of the pen core cover is covered and buckled on the pen core, and the pen core cover is in a shape of a clock
Optionally, the elastic element includes a spring and a limiting sleeve, the limiting sleeve is accommodated in the mounting cavity, the cartridge is sleeved in the limiting sleeve, and the spring is sleeved in the limiting sleeve and abuts against a cavity side wall of the mounting cavity.
Optionally, a limiting protrusion is formed on the surface of one side, facing the image acquisition assembly, of the limiting sleeve in a protruding manner, and the spring is sleeved on the limiting protrusion;
the pen core is abutted against the limiting sleeve under the action of external force, so that the limiting protrusion abuts against and triggers the image acquisition assembly.
Optionally, the cross section of the limiting protrusion is gradually reduced along the direction extending towards the image acquisition assembly.
Optionally, the limiting sleeve comprises a sleeve body and a limiting plug, and the sleeve body is accommodated in the installation cavity;
the refill cup joints in the sleeve pipe is internal, spacing end cap can dismantle connect in the sleeve pipe body is close to the tip of image acquisition subassembly.
Optionally, an insertion hole is formed in one side, facing the image acquisition assembly, of the sleeve body, and the limiting plug is inserted into the insertion hole.
Optionally, the outer side surface of the limiting plug is convexly provided with a stopping flange along the circumferential direction, and when the limiting plug is inserted into the insertion hole, the stopping flange abuts against the surface of the sleeve body on one side facing the image acquisition assembly.
Optionally, an avoiding hole communicated with the mounting cavity is formed in the lower end of the pen rack, and the end part, away from the image acquisition assembly, of the pen core extends outwards from the avoiding hole;
the side wall of the hole of the avoiding hole is provided with a limiting flange, and the lower part of the pen core can be abutted against the limiting flange.
Optionally, a gap formed between the limiting flange and the outer side surface of the pen core ranges from 0.05mm to 0.1 mm.
Optionally, the image acquisition assembly includes inductor and camera, the inductor is located the installation intracavity, and be located the top of elastic component, the camera with the inductor communication is connected.
The technical scheme of the utility model in the penholder be equipped with the installation cavity, the installation cavity is located to image acquisition subassembly, refill and elastic component. When the intelligent pen is used for writing, the pen core faces the image acquisition assembly under the action of pressure
One side moves and triggers an image acquisition component, and the image acquisition component correspondingly identifies and acquires characters, images and symbols on a paper surface; when the pen is in a non-writing state, the pen core moves away from one side of the image acquisition assembly under the action of elastic force of the elastic part, so that the pen core can be prevented from continuously triggering the image acquisition assembly or the pen core cannot be restored to the initial position, and acquisition of the image acquisition assembly is influenced. And simultaneously, the beneficial effects of the utility model are that the ink that prevents the refill the inside is revealed.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an embodiment of the smart pen of the present invention;
FIG. 2 is a top view of the smart pen of FIG. 1;
FIG. 3 is a sectional view of the smart pen of FIG. 1 taken along the direction III-III;
FIG. 4 is an enlarged detail view taken at A in FIG. 3;
fig. 5 is an enlarged detail view at B in fig. 3.
Fig. 6 is a schematic diagram of a structure of the pen core cover.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Referring to fig. 1 to 6 the present invention provides an intelligent pen 10.
In the embodiment of the present invention, the smart pen 10 includes:
the pen rack 10 is provided with a mounting cavity 10a for accommodating a pen core 30;
the image acquisition assembly is arranged in the installation cavity 10 a;
the elastic element 40 is arranged in the installation cavity 10a and elastically abuts against the pen core 30, the pen core 30 can move towards one side of the image acquisition component under the action of external force and trigger the image acquisition component, and the elastic element 40 provides elastic force so that the pen core 30 moves towards one side far away from the image acquisition component and abuts against the cavity side wall of the installation cavity 10 a.
The pen cap 51 is internally provided with a pen core cover 50, one end of the pen core cover 50 is in a soft rope shape and is connected in the pen cap 51 in a dispensing mode, the other end of the pen core cover 50 is covered and buckled on the pen core 30, and the pen core cover 50 is in a collision bell shape and prevents the pen core from missing ink.
The pen core cover 50 is in a rope shape at one end and in a cup shape at the other end, the combination is similar to a clock shape, and the pen core cover 50 is a silica gel product or is integrally formed, or the two ends are buckled and combined to form the pen core cover.
After the intelligent pen is used up, the pen core cover is covered at the writing end of the pen core, and then the pen cap is covered on the pen rack.
Particularly, the utility model discloses an intelligence pen 10 includes penholder 10, image acquisition subassembly, refill 30 and elastic component 40. The pen rack 10 is integrally formed by a plastic material or a metal material, the pen rack 10 is a hollow shell structure, the whole pen rack 10 is arranged in a cylindrical extending manner, an installation cavity 10a for installing the image acquisition assembly, the pen core 30 and the elastic element 40 is formed in the pen rack 10, the installation cavity 10a is open at one end, and the opening faces to the lower end of the pen rack 10.
The image acquisition assembly comprises an inductor 21 and a camera 22, wherein the inductor 21 is arranged in the installation cavity 10a and is positioned at the upper end of the installation cavity 10a, namely, one side of the opening end of the installation cavity 10a is far away from the inductor 21, the inductor 21 is a pressure inductor 21, and the pressure inductor 21 is attached to the cavity side wall of the installation cavity 10a in a bonding mode. The camera 22 is disposed in the installation cavity 10a and disposed adjacent to the opening end of the installation cavity 10a, and the camera 22 can capture an image through the opening of the installation cavity 10 a. The camera 22 is in communication with the sensor 21. It can be understood that, in an embodiment, the image capturing assembly further includes a Printed Circuit Board (PCB), the PCB 23 is disposed in the mounting cavity 10a, the camera 22 and the sensor 21 are connected to the PCB 23 through a connecting wire, that is, the PCB 23 is used to achieve communication connection therebetween, so that the structure of the smart pen 10 is relatively simple. In other embodiments, the camera 22 and the sensor 21 may be connected via bluetooth or wireless communication, so that the structure of the smart pen 10 is more compact.
The refill 30 comprises a needle tube 31 and a tip 32, the needle tube 31 is arranged in the mounting cavity 10a and extends towards the inductor 21 at the upper end of the needle tube, and the tip 32 is connected to the end of the needle tube 31 facing away from the inductor 21, namely, the tip 32 is arranged at the lower end of the mounting cavity 10a and partially protrudes outwards from the mounting cavity 10 a.
The utility model discloses an intelligence pen 10 is when writing, nib 32 receives the pressure effect from writing the object, along vertical direction upward movement promptly, needle tubing 31 deviates from the tip of nib 32 and supports the top in the inductor 21 that is located its top, inductor 21 is triggered the back, send the signal of telecommunication to camera 22, camera 22 receives behind the signal of telecommunication, the characters of writing on writing the object are gathered and discerned the user in step, symbol or image, and turn into electronic document orientation storage with it, so can realize the synchronous type-in of user when writing, the improvement of great degree the efficiency of handling official business.
Because a gap exists between the pen core 30 and the pen rack 10, the pen core 30 can shake during writing to influence writing, and the end of the needle tube 31 can not accurately abut against the sensor 21 due to the shake of the pen core 30, so that image acquisition and recognition of the intelligent pen 10 are influenced. The utility model discloses in through set up elastic component 40 in installation cavity 10a to avoid refill 30 to produce at the in-process that uses and rock. The elastic element 40 is arranged in the mounting cavity 10a and elastically abuts against the pen core 30, the pen core 30 moves towards one side of the inductor 21 under the action of external force and triggers the camera 22, and the elastic element 40 provides elastic force to enable the pen core 30 to move towards one side far away from the inductor 21 and abut against the cavity side wall of the mounting cavity 10 a. In this way, the elastic member 40 disposed in the mounting cavity 10a can prevent the pen core 30 from continuously triggering the image capturing assembly or prevent the pen core 30 from restoring to the initial position, thereby affecting the image capturing assembly. And simultaneously, the utility model discloses an elasticity effect that elastic component 40 provided for 30 butts of refill in the chamber lateral wall of installation cavity 10a, clearance fit between refill 30 and the penholder 10 is eliminated through the effect of elastic component 40's elasticity promptly, and refill 30 and penholder 10 firmly laminate, so can avoid greatly the in-process refill 30 production of writing to rock, thereby improve user's experience degree.
The utility model discloses an elastic action of elastic component 40 for refill 30 can be fixed in mounting chamber 10a firmly in, thereby keeps away it and produces the in-process of writing and rocks. Therefore, it can be understood that, by providing the elastic member 40, the cartridge 30 of the present invention can adopt cartridges 30 with different specifications, such as a commercially available universal water-based cartridge 30, without adopting a specially customized cartridge 30, thereby improving interchangeability and versatility of the smart pen 10 and greatly facilitating use of users.
Specifically, in an embodiment of the present invention, the elastic element 40 includes a spring 41 and a limiting sleeve 42, the limiting sleeve 42 is a tubular arrangement, and is disposed in the installation cavity 10a along the length direction of the pen holder 10, and the diameter of the inner tube of the limiting sleeve 42 is slightly larger than the diameter of the needle tube 31 of the pen core 30, so that the needle tube 31 can be sleeved in the limiting sleeve 42. In this application, the lower end of the needle tube 31 is formed with a stopper protrusion along the circumferential direction thereof, and when the needle tube 31 is sleeved in the limiting sleeve 42, the stopper protrusion abuts against the lower surface of the limiting sleeve 42 to prevent the pen point 32 from retracting into the limiting sleeve 42. The spring 41 is sleeved on the upper end of the limiting sleeve 42 and elastically abuts against the cavity side wall of the installation cavity 10a, under the action of the elastic force of the spring 41, the lower end of the limiting sleeve 42 abuts against the stop protrusion, and the whole refill 30 abuts against the opening end of the installation cavity 10a, so that the refill 30 abuts against the cavity side wall of the installation cavity 10a while the end of the refill 30 is far away from the inductor 21. In this application, limiting sleeve 42 is located to 30 covers of refill, through limiting sleeve 42's spacing guide effect for refill 30 when reciprocating motion in installation cavity 10a, great skew or great beat can not take place for the orbit of its motion, thereby has further reduced the in-process refill 30 of writing and has taken place to rock the range, has improved the experience degree that the user wrote.
Referring to fig. 4 again, in order to facilitate the assembly and disassembly of the spring 41, in an embodiment of the present invention, the limiting sleeve 42 includes a sleeve body 421 and a limiting plug 422, which are detachably connected. The sleeve body 421 is cylindrical and extends along the length direction of the pen holder 10, and the pen core 30 is sleeved in the sleeve body 421. The end of the sleeve body 421 away from the pen point 32 is provided with a plug hole 421 a. The whole of the limiting plug 422 is cylindrically extended, one end of the limiting plug 422 is inserted into the insertion hole 421a and is fixedly connected with the sleeve body 421, the surface of the side, away from the sleeve body 421, of the limiting plug 422 protrudes towards one side of the inductor 21 to form a limiting protrusion 4221, the spring 41 is sleeved on the limiting protrusion 4221, one end of the spring 41 abuts against the limiting plug 422, and the other end of the spring 41 abuts against the cavity side wall of the installation cavity 10 a. It should be noted that, in the present application, the inductor 21 is adhered to the bottom wall of the mounting cavity 10a, and the bottom of the mounting cavity is provided with a protrusion protruding around the circumference of the inductor 21. When writing, the pen core 30 abuts against the limiting sleeve 42, the limiting plug 422 is abutted against one side of the inductor 21 by the limiting sleeve 42, the spring 41 abuts against a circumferential bulge of the inductor 21, and the limiting bulge 4221 continues to move towards one side of the inductor 21 and finally abuts against and triggers the inductor 21. In this application, spring 41 cup joints on spacing end cap 422 through spacing arch 4221. The structure of the elastic member 40 is simple, and the mounting and dismounting operation of the spring 41 is convenient.
In an embodiment of the present invention, the cross section of the limiting protrusion 4221 is gradually reduced along the direction toward one side of the image capturing component. That is, the limit protrusion 4221 is disposed in a tapered shape facing one side of the inductor 21. When the spring 41 is sleeved on the limit protrusion 4221, the lower end of the spring 41 is in interference fit with the lower end of the limit protrusion 4221, and the upper end of the spring 41 is in clearance fit with the upper end of the limit protrusion 4221. Therefore, the spring 41 has a certain compression amount, and the spring 41 can be firmly fixed on the limiting protrusion 4221 by the fixing action of the lower end of the limiting protrusion 4221, so that the spring 41 is prevented from falling off when in use, and the use of the smart pen 10 is prevented from being influenced.
It can be understood that when the sensor 21 is triggered, the limiting stopper 422 receives the resisting force from the sensor 21 and the elastic force of the spring 41, so that the depth of the limiting stopper 422 inserted into the insertion hole 421a is prevented from being too deep. In an embodiment of the present invention, the outer side surface of the limiting plug 422 is protruded along the circumferential direction to form a stopping flange 4222, and the stopping flange 4222 is continuously disposed along the circumferential direction of the limiting plug 422. When the limiting plug 422 is inserted into the insertion hole 421a, the stop flange 4222 abuts against a surface of the sleeve body 421 facing the image capturing component. Therefore, the limiting stopping effect of the stopping flange 4222 is achieved, the situation that the limiting plug 422 is inserted into the inserting hole 421a too deeply after the limiting plug 422 repeatedly abuts against the inductor 21 is avoided, and the use stability of the intelligent pen 10 is guaranteed.
In other embodiments of the present invention, the hole sidewall of the insertion hole 421a is provided with an internal thread, the outer side surface of the limiting plug 422 is provided with an external thread, and the limiting plug 422 is inserted into the insertion hole 421a and is connected to the sleeve body 421 by a thread. So not only can avoid spacing end cap 422 to insert the too dark condition of plug hole 421a, the connection of spacing end cap 422's sleeve pipe body 421 is more firm moreover to the stability of writing of smart pen 10 has further been improved.
Referring to fig. 3 and 5 again, in an embodiment of the present invention, the pen rack 10 includes a pen body 11 and a pen cover 12, the pen cover 12 is detachably connected to the pen body 11 and encloses with the pen body 11 to form the installation cavity 10a, wherein the pen cover 12 is connected to the pen body 11 through a screw thread, and the pen cover 12 is further provided with an avoiding hole 10b communicating with the installation cavity 10 a. When the pen core 30 is accommodated in the mounting cavity 10a, the limiting sleeve 42 is located on the upper surface of the stopping protrusion, the lower surface of the stopping protrusion abuts against the pen cap 12 under the action of the elastic force of the spring 41, and the pen core 30 is firmly fixed in the mounting cavity 10a under the action of the elastic force of the spring 41, so that the pen core 30 is further prevented from shaking during writing. Meanwhile, the pen cap 12 and the pen body 11 are connected through threads, so that the replacement operation of the pen core 30 is convenient.
In order to further improve the writing stability of the smart pen 10, in an embodiment of the present application, the hole sidewall of the avoiding hole 10b protrudes toward the pen core 30 to form a limiting flange 121, and the lower portion of the pen core 30, i.e., the portion of the pen tip 32, protrudes out from the avoiding hole 10b, so that during the writing process, the pen tip 30 is subjected to the friction force in the horizontal direction, and thus the portion of the pen tip 32 swings in the horizontal direction. In this application, through setting up this limit flange 121 for when nib 32 swung in the horizontal direction, limit flange 121 butt in the lateral surface of nib 32, so can reduce the swing of nib 32 part, thereby further improve the stability of writing.
Referring to fig. 5 again, in an embodiment of the present invention, a range of a gap formed between the side surface of the limiting flange 121 and the outer side surface of the pen point 32 is 0.05mm to 0.1mm, wherein the gap may be any one of 0.05mm, 0.075mm, 0.08mm, and 0.1 mm. It can be understood that, when the range of the gap between the position-limiting flange 121 and the outer side of the pen point 32 is less than 0.05mm, due to the processing tolerance, when the pen point 32 extends out of the avoiding hole 10b, there is a situation of being stuck, so that the pen core 30 cannot be reset under the elastic force of the elastic element 40, thereby affecting the use. When the range of the gap between the limiting flange 121 and the outer side surface of the pen point 32 is greater than 0.1mm, the gap between the pen point 32 and the limiting flange 121 is too large, so that the limiting flange 121 cannot limit the pen point 32 in the writing process, and the lower end of the pen core 30 shakes to a greater extent to influence writing. In the application, the gap range value is set to be between 0.05mm and 0.1mm, so that the shaking amplitude generated in the writing process of the intelligent pen 10 can be reduced, the sensor 21 can be accurately triggered,
and the pen core 30 can be prevented from being stuck when the sensor 21 is triggered repeatedly, so that the intelligent pen 10 can write more smoothly.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. The utility model provides a prevent intelligent pen that refill ink revealed which characterized in that includes:
the pen rack is provided with an installation cavity for accommodating a pen core;
the image acquisition assembly is arranged in the installation cavity; and
the elastic piece is arranged in the mounting cavity and elastically abutted against the pen core, the pen core can move towards one side of the image acquisition assembly under the action of external force and trigger the image acquisition assembly, and the elastic piece provides elastic force so that the pen core moves towards one side far away from the image acquisition assembly and abuts against the cavity side wall of the mounting cavity;
the pen cap is internally provided with a pen core cover, one end of the pen core cover is connected in the pen cap, the other end of the pen core cover is covered and buckled on the pen core, and the pen core cover is in a clock-striking shape.
2. The intelligent pen capable of preventing ink leakage from the pen core as claimed in claim 1, wherein the elastic member comprises a spring and a limiting sleeve, the limiting sleeve is accommodated in the mounting cavity, the pen core is sleeved in the limiting sleeve, and the spring is sleeved on the limiting sleeve and abuts against a cavity side wall of the mounting cavity.
3. The intelligent pen capable of preventing ink leakage from the pen core as claimed in claim 2, wherein a limiting protrusion is convexly formed on the surface of one side of the limiting sleeve facing the image acquisition assembly, and the spring is sleeved on the limiting protrusion;
the pen core is abutted against the limiting sleeve under the action of external force, so that the limiting protrusion abuts against and triggers the image acquisition assembly.
4. The intelligent pen for preventing ink leakage from the pen core according to claim 3, wherein the cross section of the limiting protrusion is gradually reduced along the direction extending towards the image acquisition assembly.
5. The intelligent pen capable of preventing ink leakage from the pen core as claimed in claim 3, wherein the limiting sleeve comprises a sleeve body and a limiting plug, and the sleeve body is accommodated in the installation cavity;
the refill cup joints in the sleeve pipe is internal, spacing end cap can dismantle connect in the sleeve pipe body is close to the tip of image acquisition subassembly.
6. The intelligent pen capable of preventing ink leakage from the pen core as claimed in claim 5, wherein an insertion hole is formed in one side, facing the image acquisition assembly, of the sleeve body, and the limiting plug is inserted into the insertion hole.
7. The intelligent pen capable of preventing ink leakage from the pen core as claimed in claim 6, wherein a stop flange is formed by protruding the outer side surface of the limiting plug along the circumferential direction, and when the limiting plug is inserted into the insertion hole, the stop flange abuts against the surface of the casing body on the side facing the image acquisition assembly.
8. The intelligent pen capable of preventing ink leakage from the pen core according to any one of claims 1 to 7, wherein an avoidance hole communicated with the mounting cavity is formed in the lower end of the pen holder, and the end part, away from the image acquisition assembly, of the pen core extends outwards from the avoidance hole;
the side wall of the hole of the avoiding hole is provided with a limiting flange, and the lower part of the pen core can be abutted against the limiting flange.
9. The intelligent pen capable of preventing ink leakage from the pen core as claimed in claim 8, wherein a gap formed between the limit flange and the outer side surface of the pen core ranges from 0.05mm to 0.1 mm.
10. The intelligent pen capable of preventing ink leakage from the pen core according to any one of claims 1 to 7, wherein the image acquisition assembly comprises an inductor and a camera, the inductor is arranged in the installation cavity and is positioned above the elastic piece, and the camera is in communication connection with the inductor.
Priority Applications (1)
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CN202021489735.2U CN213056498U (en) | 2020-07-25 | 2020-07-25 | Intelligent pen capable of preventing ink leakage of pen refill |
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CN202021489735.2U CN213056498U (en) | 2020-07-25 | 2020-07-25 | Intelligent pen capable of preventing ink leakage of pen refill |
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CN213056498U true CN213056498U (en) | 2021-04-27 |
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CN202021489735.2U Active CN213056498U (en) | 2020-07-25 | 2020-07-25 | Intelligent pen capable of preventing ink leakage of pen refill |
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2020
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