阅读说明：本技术 一种探针笔尖、笔芯及电动画笔 (Probe nib, refill and electronic painting brush ) 是由 宋硕昌 于 2020-12-28 设计创作，主要内容包括：本发明涉及文具用品技术领域,公开了一种探针笔尖、笔芯及电动画笔,所述探针笔尖内设有笔尖内腔,所述探针笔尖的进墨端设有与所述笔尖内腔连通的进墨孔；所述探针笔尖的出墨端设有连通所述笔尖内腔的笔嘴,所述笔嘴包括导向槽和出墨孔,所述导向槽位于所述笔尖内腔和所述出墨孔之间,并分别与所述笔尖内腔及所述出墨孔连通,所述笔尖内腔内安装有弹性件,所述弹性件的活动端固定设有触针；探针笔尖在笔嘴部位取消了滚珠,由可伸缩的触针取代,能够采用高黏稠度的特种油墨进行正常点画。(The invention relates to the technical field of stationery, and discloses a probe pen point, a pen core and an electric painting brush, wherein a pen point inner cavity is arranged in the probe pen point, and an ink inlet end of the probe pen point is provided with an ink inlet hole communicated with the pen point inner cavity; the ink outlet end of the probe pen point is provided with a pen nozzle communicated with the inner cavity of the pen point, the pen nozzle comprises a guide groove and an ink outlet hole, the guide groove is positioned between the inner cavity of the pen point and the ink outlet hole and is respectively communicated with the inner cavity of the pen point and the ink outlet hole, an elastic piece is arranged in the inner cavity of the pen point, and a contact pin is fixedly arranged at the movable end of the elastic piece; the probe pen point cancels a ball at the pen mouth part, is replaced by a telescopic contact pin, and can adopt special ink with high viscosity to carry out normal stippling.)

1. A probe pen point is internally provided with a pen point inner cavity, and an ink inlet end of the probe pen point is provided with an ink inlet hole communicated with the pen point inner cavity; the probe is characterized in that the ink outlet end of the probe pen point is provided with a pen nozzle communicated with the inner cavity of the pen point;

the pen nozzle comprises a guide groove and an ink outlet hole; the guide groove is positioned between the pen point inner cavity and the ink outlet hole and is respectively communicated with the pen point inner cavity and the ink outlet hole;

an elastic piece is arranged in the inner cavity of the pen point, and a contact pin is fixedly arranged at the movable end of the elastic piece; the elastic piece is used for driving the movable end of the elastic piece to extend into the guide groove and blocking the ink outlet hole; when the movable end of the elastic piece encloses the ink outlet hole, the contact pin extends out of the pen nozzle through the ink outlet hole;

the movable end of the elastic piece is the end of the elastic piece far away from the ink inlet hole.

2. The probe tip of claim 1, wherein the resilient member is a spring;

a horn mouth for limiting the fixed end of the elastic piece is formed at the joint of the nib inner cavity and the ink inlet hole; the horn mouth is arranged around the ink inlet hole;

the fixed end of the elastic piece is abutted against the inner wall of the bell mouth;

the fixed end of the elastic piece is one end, close to the ink inlet hole, of the elastic piece.

3. The probe tip of claim 1, wherein the guide groove is a circular arc groove in the shape of a spherical crown; the guide groove and the inner cavity of the pen point are integrally formed;

the movable end of the elastic piece and the contact pin are integrally formed.

4. The probe tip of claim 3, wherein the ink inlet and the ink outlet are each circular-hole shaped; the contact pin is a cylindrical pin body, and one end of the contact pin, which is far away from the elastic part, is in a segment shape;

the diameter of the ink inlet hole is larger than that of the ink outlet hole.

5. A pen core, comprising an ink tube and a pen point fixed at the head end of the ink tube, wherein the pen point adopts the probe pen point as in any one of claims 1 to 4, and the ink inlet hole is communicated with an ink storage cavity of the ink tube.

6. The pen core according to claim 5, characterized in that an air inlet pipe is connected to the tail end of the ink tube, and the air inlet pipe is provided with an air inlet cavity communicated with the ink storage cavity;

the air inlet pipe is sleeved with an inflating part, and an elastic air bag is formed on one side of an air inlet port of the air inlet pipe by the inflating part; a driving rod is inserted in the air inlet pipe; one end of the driving rod extends out of one side of the elastic air bag far away from the air inlet pipe and is provided with a pressing part for pressing the elastic air bag; the driving rod and the elastic air bag are surrounded to form an ear cavity communicated with the air inlet cavity; the other end of the driving rod extends into the air inlet pipe and is provided with a sealing piece for plugging an air outlet port of the air inlet pipe;

an air inlet hole is reserved between the pressing part and the elastic air bag and is communicated with the ear cavity;

when the elastic air bag is not pressed, the sealing element blocks the air outlet port of the air inlet pipe; when the elastic air bag is pressed, the sealing piece is separated from the air outlet port of the air inlet pipe, and the air inlet cavity is communicated with the ink storage cavity.

7. A refill according to claim 6, wherein said sealing member is frustoconical; a connecting pipeline in a circular truncated cone shape is formed at the tail end of the ink pipe, and the connecting pipeline and the air inlet pipe are integrally formed; a gap is formed between the driving rod and the inner wall of the air inlet pipe;

the diameter of the pipe port at one end of the connecting pipe close to the air inlet pipe is smaller than that of the pipe port at one end of the connecting pipe far away from the air inlet pipe;

when the elastic air bag is not pressed, the outer side wall of the sealing element is abutted against the inner wall of the pipe of the connecting pipeline.

8. A refill according to claim 6, wherein said pressing portion, said driving rod, said sealing member and said elastic air bag are integrally formed;

the pressing part, the driving rod, the sealing piece and the elastic air bag are made of elastic rubber or silica gel materials.

9. An electric painting brush comprises a pen tube and is characterized in that the pen core as claimed in claim 6 is installed in the pen tube, a magnetic attraction piece is arranged on the pressing part, and the magnetic attraction piece is a permanent magnet or an iron block;

the pen tube is also internally provided with a driving device and a magnet mounting seat, and the magnet mounting seat is provided with a pen core connecting magnet; the refill is connected with a magnetic body and is magnetically attracted with the magnetic attraction piece;

and the driving end of the driving device is in transmission connection with the magnet mounting seat and is used for driving the magnet mounting seat to perform reciprocating linear motion so as to drive the pen core to perform reciprocating linear motion.

10. The electric brush of claim 9 wherein the drive means is a micro linear reciprocating motor or the drive means includes a rotary motor and a switching means connected to a rotating shaft of the rotary motor for driving the magnet mount to reciprocate.

Technical Field

The invention relates to the technical field of stationery, in particular to a probe pen point, a pen core and an electric painting brush.

Background

The existing gel pen nib on the market is usually of a ball structure, as shown in fig. 1, the upper end of the nib 200 is sleeved and fixed at one end of the cartridge holder, the nib (i.e. the ink outlet hole) of the nib 200 is provided with a ball 210 and a holder, the ball 210 can seal the ink in the cartridge holder and also serves as a transfer medium, and in the friction rolling process of the ball 210 and the paper surface, the ball 210 transfers the ink adhered to the surface of the ball onto the paper surface in a rolling manner.

The pen tip 200 of the gel ink pen is mainly used for drawing lines and dots in the drawing field, and therefore, the electric dot-and-brush pen is used as a main application accessory for creating a dot-and-dash painting.

However, the ball structure is only suitable for the neutral ink with lower viscosity, and the existing neutral pen is not suitable for surfaces made of special materials except paper, such as smooth surfaces of ceramics, metals and the like, due to the characteristics of the neutral ink. According to research results, the demand of users of electric paintbrushes for drawing pictures on ceramics and drawing pictures on metal surfaces is increasingly strong in recent years, and special ink with high viscosity is required to be used as pigment on the surfaces of special materials, such as ceramic ink, special ink for knitted fabrics and the like, the special ink with high viscosity has poor fluidity, the air drying time of the special ink is short, and if a pen point with the ball structure is adopted, the ink is easy to dry to form ink blocks when flowing out through a pen nozzle (or an ink outlet hole) so as to cause the blockage of the pen nozzle, and the normal stippling cannot be realized.

Therefore, there is a need for an improved nib structure that can be used to perform normal stippling with high viscosity specialty inks.

Disclosure of Invention

The invention aims to provide a probe pen point, a pen core and an electric painting brush to solve the technical problems.

In order to achieve the purpose, the invention adopts the following technical scheme:

in a first aspect, the invention provides a probe pen point, wherein a pen point inner cavity is arranged in the probe pen point, and an ink inlet hole communicated with the pen point inner cavity is formed in an ink inlet end of the probe pen point; the ink outlet end of the probe pen point is provided with a pen nozzle communicated with the inner cavity of the pen point;

the pen nozzle comprises a guide groove and an ink outlet hole; the guide groove is positioned between the pen point inner cavity and the ink outlet hole and is respectively communicated with the pen point inner cavity and the ink outlet hole;

an elastic piece is arranged in the inner cavity of the pen point, and a contact pin is fixedly arranged at the movable end of the elastic piece; the elastic piece is used for driving the movable end of the elastic piece to extend into the guide groove and blocking the ink outlet hole; when the movable end of the elastic piece encloses the ink outlet hole, the contact pin extends out of the pen nozzle through the ink outlet hole;

the movable end of the elastic piece is the end of the elastic piece far away from the ink inlet hole.

Optionally, the elastic member is a spring;

a horn mouth for limiting the fixed end of the elastic piece is formed at the joint of the nib inner cavity and the ink inlet hole; the horn mouth is arranged around the ink inlet hole;

the fixed end of the elastic piece is abutted against the inner wall of the bell mouth;

the fixed end of the elastic piece is one end, close to the ink inlet hole, of the elastic piece.

Optionally, the guide groove is a spherical arc groove; the guide groove and the inner cavity of the pen point are integrally formed;

the movable end of the elastic piece and the contact pin are integrally formed.

Optionally, the ink inlet and the ink outlet are both circular holes; the contact pin is a cylindrical pin body, and one end of the contact pin, which is far away from the elastic part, is in a segment shape;

the diameter of the ink inlet hole is larger than that of the ink outlet hole.

In a second aspect, the invention further provides a pen core, which comprises an ink tube and a probe pen point fixed at the head end of the ink tube, wherein the ink inlet is communicated with the ink storage cavity of the ink tube.

Optionally, the tail end of the ink tube is connected with an air inlet tube, and the air inlet tube is provided with an air inlet cavity communicated with the ink storage cavity;

the air inlet pipe is sleeved with an inflating part, and an elastic air bag is formed on one side of an air inlet port of the air inlet pipe by the inflating part; a driving rod is inserted in the air inlet pipe; one end of the driving rod extends out of one side of the elastic air bag far away from the air inlet pipe and is provided with a pressing part for pressing the elastic air bag; the driving rod and the elastic air bag are surrounded to form an ear cavity communicated with the air inlet cavity; the other end of the driving rod extends into the air inlet pipe and is provided with a sealing piece for plugging an air outlet port of the air inlet pipe;

an air inlet hole is reserved between the pressing part and the elastic air bag and is communicated with the ear cavity;

when the elastic air bag is not pressed, the sealing element blocks the air outlet port of the air inlet pipe; when the elastic air bag is pressed, the sealing piece is separated from the air outlet port of the air inlet pipe, and the air inlet cavity is communicated with the ink storage cavity.

Optionally, the sealing element is in a circular truncated cone shape; a connecting pipeline in a circular truncated cone shape is formed at the tail end of the ink pipe, and the connecting pipeline and the air inlet pipe are integrally formed; a gap is formed between the driving rod and the inner wall of the air inlet pipe;

the diameter of the pipe port at one end of the connecting pipe close to the air inlet pipe is smaller than that of the pipe port at one end of the connecting pipe far away from the air inlet pipe;

when the elastic air bag is not pressed, the outer side wall of the sealing element is abutted against the inner wall of the pipe of the connecting pipeline.

Optionally, the pressing portion, the driving rod, the sealing member and the elastic airbag are integrally formed;

the pressing part, the driving rod, the sealing piece and the elastic air bag are made of elastic rubber or silica gel materials.

In a third aspect, the invention further provides an electric painting brush, which comprises a brush tube, wherein the brush core is arranged in the brush tube, the pressing part is provided with a magnetic part, and the magnetic part is a permanent magnet or an iron block; the pen tube is also internally provided with a driving device and a magnet mounting seat, and the magnet mounting seat is provided with a pen core connecting magnet; the refill is connected with a magnetic body and is magnetically attracted with the magnetic attraction piece;

and the driving end of the driving device is in transmission connection with the magnet mounting seat and is used for driving the magnet mounting seat to perform reciprocating linear motion so as to drive the pen core to perform reciprocating linear motion.

Optionally, the driving device is a micro linear reciprocating motor, or the driving device includes a rotating motor and a conversion device connected to a rotating shaft of the rotating motor and used for driving the magnet mounting seat to reciprocate.

The invention has the beneficial effects that: the ball is cancelled at the pen mouth of the pen point of the probe, and the probe point is replaced by a telescopic contact pin, when the contact pin is not extruded by external force, the elastic piece drives the contact pin to extend out of the pen mouth, the ink with higher viscosity is contacted with air and is easy to naturally air-dry to form a blocking block, and the blocking block forms a blocking barrier to prevent the ink from continuously overflowing outwards, so that the blocking of the ink in the tube is realized; when the contact pilotage touches paper or other object surfaces, the contact pilotage receives in external force extrusion retraction entering pen mouth, can lead to the fact the destruction to the shutoff barrier that the sprue formed to can release printing ink, and printing ink is when the air-dried sprue of flowing through, and the inside thinner of printing ink also can dissolve air-dried printing ink piece, can further destroy the shutoff barrier and make the outflow that printing ink can be smooth and easy, with the realization can go out the purpose of china ink.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and 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 these drawings without inventive exercise.

FIG. 1 is a schematic diagram of a prior art gel pen nib;

FIG. 2 is a schematic diagram of a structure of a pen core provided by an embodiment of the invention;

FIG. 3 is a schematic diagram of a probe tip according to an embodiment of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 2;

FIG. 5 is a schematic view of a probe tip according to an embodiment of the present invention with its stylus retracted into the tip;

FIG. 6 is a schematic view of a probe tip according to an embodiment of the present invention with its stylus extending out of the tip;

fig. 7 is a schematic structural diagram of a pen core when an elastic air bag of the pen core is pressed according to an embodiment of the invention.

In the figure:

200. a tip of a gel-ink pen; 210. a ball bearing;

10. an ink tube; 101. an ink storage chamber; 102. an air inlet cavity; 11. printing ink; 12. a barrier layer; 13. connecting the pipelines; 14. an air inlet pipe; 20. a probe tip; 201. the inner cavity of the pen point; 2011. an ink inlet hole; 2012. an ink outlet; 202. a guide groove; 203. a bell mouth; 21. a stylus; 22. an elastic member; 31. an air intake component; 311. a pressing part; 32. an inflation section; 3201. an ear cavity; 321. an elastic air bag; 312. a drive rod; 313. a seal member; 33. an air inlet; 34. a magnetic member; 40. and (7) blocking.

Detailed Description

In order to make the objects, features and advantages of the present invention more obvious and understandable, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the embodiments described below are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.

Referring to fig. 2, 3 and 4, fig. 2 is a schematic structural diagram of a pen core according to an embodiment of the present invention, fig. 3 is a schematic structural diagram of a probe pen tip according to an embodiment of the present invention, and fig. 4 is an enlarged schematic view of a portion B in fig. 2.

The embodiment of the invention discloses a refill which can better solve the ink discharging problem of high-viscosity ink. The cartridge includes an ink tube 10 and a probe tip 20 fixed to a head end of the ink tube 10 (a lower end of the ink tube 10 in fig. 2).

Specifically, a nib inner cavity 201 is arranged in the probe nib 20, an ink inlet port 2011 communicated with the nib inner cavity 201 is arranged at an ink inlet end (the upper end of the probe nib 20 in fig. 3) of the probe nib 20, and the ink inlet port 2011 is communicated with the ink storage cavity 101 of the ink tube 10; the ink outlet end (the lower end of the probe pen point 20 in fig. 3) of the probe pen point 20 is provided with a pen nozzle communicated with an inner cavity 201 of the pen point; as shown in the figure, the ink storage cavity 101 of the ink tube 10 is used for storing ink 11, and the upper surface of the ink 11 is provided with a barrier layer 12 for blocking air;

the pen nozzle comprises a guide groove 202 and an ink outlet 2012; the guide groove 202 is positioned between the pen point inner cavity 201 and the ink outlet 2012 and is respectively communicated with the pen point inner cavity 201 and the ink outlet 2012;

an elastic piece 22 is arranged in the inner cavity 201 of the pen point, and a contact pin 21 is fixedly arranged at the movable end (the lower end of the elastic piece 22 in fig. 3) of the elastic piece 22;

when the contact pin 21 is not pressed by an external force, the elastic element 22 drives the contact pin 21 to extend out of the pen nozzle from the ink outlet 2012, and at this time, the movable end of the elastic element 22 abuts against the inner wall of the guide groove (202), so as to enclose or block an opening (an opening at the upper end of the ink outlet 2012 in fig. 3) at one end of the ink outlet 2012 located in the pen nozzle, and the elastic element 22 is in a natural extension state or a compression state;

when the stylus 21 is pressed and retracted into the pen nozzle by an external force, the elastic member 22 is contracted, and the movable end of the elastic member 22 is separated or partially separated from the guide groove 202.

With continued reference to fig. 5 and 6, fig. 5 is a schematic structural view of a probe tip 20 according to an embodiment of the present invention when a stylus 21 thereof is retracted into a pen nozzle, and fig. 6 is a schematic structural view of the probe tip 20 according to an embodiment of the present invention when the stylus 21 thereof is extended out of the pen nozzle.

The probe tip 20 of the present embodiment is replaced with a retractable stylus 21 without a ball at the tip; when the contact pin 21 extends out of the pen nozzle, the movable end of the elastic piece 22 can enclose or block the ink outlet 2012, and the ink with higher viscosity is contacted with air and is easy to be naturally dried to form a block 40, and the block is coated on the outer wall of the movable end and the outer wall of the contact pin 21 to form a blocking barrier which can seal the pen nozzle, and the blocking barrier can prevent the ink from continuously overflowing outwards, so that the blocking of the ink 11 in the tube is realized; when the contact pin 21 contacts the surface of a paper surface or other objects and is extruded by external force to retract into the pen nozzle, the formed blocking barrier is damaged, the pen nozzle is not sealed any more, so that ink can be released, and when the ink 11 in the tube flows through the air-dried blocking block 40, the diluent in the ink can also melt the air-dried blocking block 40, so that the blocking barrier is further damaged, the ink 11 can smoothly flow out, and the purpose of ink outlet is achieved.

Specifically, the elastic member 22 is a spring;

as shown in fig. 2, the nib cavity 201 is formed with a bell mouth 203 at the junction with the ink inlet 2011 for limiting the fixed end of the elastic member 22 (the upper end of the elastic member 22 in fig. 3); the bell mouth 203 is narrow at the top and wide at the bottom and is arranged around the ink inlet 2011;

the fixed end of the elastic element 22 abuts against the inner wall of the bell mouth 203, so that the elastic element 22 is limited between the ink inlet 2011 and the ink outlet 2012.

As an optional implementation manner, in this embodiment, the ink inlet 2011 and the ink outlet 2012 are both circular holes; the contact pin 21 is a cylindrical pin body, and one end of the contact pin 21, which is far away from the elastic piece 22, is in a segment shape; the diameter of the ink inlet 2011 is larger than the diameter of the ink outlet 2012.

Specifically, the guide groove 202 is a spherical arc groove; the guide groove 202 and the nib inner cavity 201 are integrally formed; the movable end of the elastic piece 22 is integrally formed with the contact pin 21.

More specifically, as shown in fig. 3, the outer diameter of the movable end of the spring is smaller than the diameter of the arc groove and larger than the diameter of the ink outlet 2012, so that the movable end of the spring can extend into the guide groove 202 to enclose and block the ink outlet 2012, as an advantageous embodiment, the end surface of the movable end of the spring (the lower end surface of the spring in fig. 3) can be designed to be a gapless surface, so that the movable end of the spring can better block the ink outlet 2012 and prevent the ink 11 from flowing out.

In order to ensure that the ink 11 can smoothly flow out of the nozzle in a state where the stylus 21 is pressed, the present embodiment adds the air intake member 31 to the refill, so that the stylus 21 is retracted into the nozzle and air is injected into the ink tube 10 from the air intake member 31 to more smoothly push out the ink.

Specifically, the tail end of the ink tube 10 (the upper end of the ink tube 10 in fig. 2) is connected with an air inlet tube 14, and the air inlet tube 14 is provided with an air inlet cavity 102 communicated with the ink storage cavity 101;

the air inlet pipe 14 is sleeved with an inflating part 32, and an elastic air bag 321 is formed on one side of an air inlet port (an upper port of the air inlet pipe 14 in fig. 4) of the air inlet pipe 14 of the inflating part 32; a drive rod 312 is inserted into the intake pipe 14; one end of the driving rod 312 extends out of one side of the elastic air bag 321 away from the air inlet pipe 14 (the upper side of the elastic air bag 321 in fig. 4), and is provided with a pressing part 311 for pressing the elastic air bag 321; an ear cavity 3201 communicated with the air inlet cavity 102 is formed by the surrounding of the driving rod 312 and the elastic air bag 321; the other end of the driving rod 312 extends into the air inlet pipe 14, and is provided with a sealing member 313 for blocking an air outlet port (a lower port of the air inlet pipe 14 in fig. 4) of the air inlet pipe 14;

an air inlet hole 33 is reserved between the pressing part 311 and the elastic air bag 321, and the air inlet hole 33 is communicated with the ear cavity 3201;

when the elastic air bag 321 is not pressed, the sealing element 313 seals the air outlet port of the air inlet pipe 14, and the air inlet cavity 102 is not communicated with the ink storage cavity 101; when the elastic air bag 321 is pressed, the driving rod 312 drives the sealing member 313 to move towards the ink storage cavity 101, the air outlet port of the air inlet pipe 14 is not blocked, and the air inlet cavity 102 is communicated with the ink storage cavity 101.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a pen core when the elastic air bag 321 is pressed according to an embodiment of the present invention.

In this embodiment, the elastic airbag 321 deforms when pressed, and two actions are generated, namely, the air inlet 33 is blocked, the air inlet cavity 102 is communicated with the ink storage cavity 101, and air in the ear cavity 3201 and the air inlet cavity 102 is squeezed into the ink storage cavity 101; when the pressing force of the elastic air bag 321 disappears, the elastic air bag 321 returns to its original shape, and the air outlet port of the air inlet pipe 14 is plugged again, and at the same time, the air inlet hole 33 is opened to suck in the outside air.

Specifically, the sealing member 313 is in a circular truncated cone shape; a connecting pipeline 13 in a truncated cone shape is formed at the tail end of the ink pipe 10, and the connecting pipeline 13 and the air inlet pipe 14 are integrally formed; a gap is required to be reserved between the driving rod 312 and the inner wall of the air inlet pipe 14;

as shown in fig. 4, the connecting pipe 13 is a pipe with a narrow top and a wide bottom, and the diameter of the pipe opening at the end close to the air inlet pipe 14 is smaller than that of the pipe opening at the end far away from the air inlet pipe 14; when the elastic bladder 321 is not pressed, the outer side wall of the sealing member 313 abuts against the inner wall of the pipe engaging the pipe 13.

In this embodiment, the pressing portion 311, the driving rod 312, the sealing member 313, and the elastic air bag 321 are integrally formed;

the pressing portion 311, the driving rod 312, the sealing member 313 and the elastic air bag 321 are made of elastic rubber or silicone material.

The embodiment also discloses an electric painting brush which comprises a pen tube, wherein the pen core is arranged in the pen tube, the pressing part 311 is provided with a magnetic part 34, and the magnetic part 34 is a permanent magnet or an iron block;

the pen tube is also internally provided with a driving device and a magnet mounting seat, and the magnet mounting seat is provided with a pen core connecting magnet; the refill is connected with a magnet and magnetically attracted with the magnetic attraction piece 34;

the driving end of the driving device is in transmission connection with the magnet mounting seat and is used for driving the magnet mounting seat to perform reciprocating linear motion, so that the pen core is driven to perform reciprocating linear motion, and the point painting is manufactured. The driving device is a micro linear reciprocating motor, or the driving device comprises a rotating motor and a conversion device which is connected with a rotating shaft of the rotating motor and is used for driving the magnet mounting seat to reciprocate.

In order to facilitate understanding, in the process of driving the pen core to do reciprocating linear motion, the pressing part 311 of the driving device of the electric painting brush and the magnet mounting seat move synchronously, when the pen point touches the surface of paper or other objects, a reaction force can be generated, the reaction force is opposite to the stress direction of the magnet mounting seat, at the moment, the elastic air bag 321 is extruded to generate deformation, the air inlet hole 33 is sealed, and air is pressed into the ink storage cavity 101 to push ink to extrude out of the pen nozzle; after the pen point leaves the paper surface, the reaction force disappears, the elastic air bag 321 recovers the deformation caused by the stress due to the elasticity of the elastic air bag, the air inlet hole is opened again, and the external air can be sucked again; so as to reciprocate.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "inside", "outside", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.