Electromagnetic pen, processing equipment and processing method

Abstract

The present invention provides an electromagnetic pen, a processing device and a processing method. The electromagnetic pen comprises a pen core, a first magnetic core having a first through hole for the pen core to pass through, a second magnetic core and a seat. The pen core comprises a pen tip for writing, and the second magnetic core is arranged at the end of the first magnetic core away from the pen tip, and has a second through hole for the pen core to pass through. The inner diameter of the first through hole is larger than the inner diameter of the second through hole, and the pen core passes through the first through hole and the second through hole in sequence. A step structure is arranged near the end of the second magnetic core near the pen tip, and an isolating member is arranged on the inner wall surface of the seat, the first magnetic core and the second magnetic core are at least partially accommodated in the seat, and the first magnetic core and the second magnetic core are respectively located on both sides of the isolating member, and the isolating member abuts against the step structure. The isolating member provided by the present invention maintains the distance between the first magnetic core and the second magnetic core before writing, realizes the requirement of the speed of the change of the electromagnetic frequency when the electromagnetic pen is used, can sensitively capture the pressure, trajectory and other information of the user when using it, and has a good writing effect.

Description

[Technical field]

[0001] The present invention relates to the technical field of computer peripheral equipment, and in particular to an electromagnetic pen, processing equipment and a processing method. [Background technology]

[0002] With the advancement of technology, digital electronic information devices have the function of track input, which is usually implemented by handwriting input. Electromagnetic pens for implementing track input of digital electronic information devices have been widely used. The electromagnetic pens can not only implement text input by handwriting, but also realize drawing, point control operation, etc.

[0003] In the existing process and actual production of electromagnetic pens in related technologies, the electromagnetic pens usually adopt a dual magnetic core structure, and the frequency change is effectively adjusted by changing the spacing distance between the first magnetic core and the second magnetic core. In order to maintain a set fixed and accurate distance between the first magnetic core and the second magnetic core when the pen core of the electromagnetic pen is in an unwritten state, the prior art usually sandwiches a film with a precise thickness between the first magnetic core and the second magnetic core to ensure that the distance between the two magnetic cores reaches the set value. However, since the film is usually an elastic element composed of a thin elastic material, the production precision is difficult to control, and the film is easily deformed or has a sharp edge in the process flow, resulting in loss of control, making the production quality control of the electromagnetic pen difficult, and the consistency and reliability are poor.

[0004] Therefore, it is necessary to provide a new electromagnetic pen processing equipment and processing method to solve the above problems. [Summary of the invention]

[0005] The film sheets of the electromagnetic pens in the prior art are usually elastic elements made of very thin elastic materials. Since the production precision is difficult to control, the film sheets are easily deformed or have burrs during the process, resulting in loss of control, making the production quality control of the electromagnetic pens difficult and inconsistent. Therefore, the present invention provides an electromagnetic pen, processing equipment and processing method.

[0006] An electromagnetic pen comprises a pen core, a first magnetic core, a second magnetic core and a seat bin, wherein the pen core comprises a pen tip arranged at its end, the first magnetic core has a first through hole for the pen core to pass through, the second magnetic core is arranged at the end of the first magnetic core away from the pen tip, and has a second through hole for the pen core to pass through, the inner diameter of the second through hole is smaller than the inner diameter of the first through hole, the pen core passes through the first through hole and the second through hole in sequence, a step structure is arranged near one end of the pen tip of the second magnetic core, an isolating member is arranged on the inner wall surface of the seat bin, the first magnetic core and the second magnetic core are at least partially accommodated in the seat bin and the first magnetic core and the second magnetic core are respectively located on both sides of the isolating member, the isolating member abuts against the step structure, and along the length direction of the pen core, the height of the step structure is smaller than the thickness of the isolating member.

[0007] Preferably, two grooves are arranged on a side of the seat bin close to the pen tip, and two protrusions are arranged on both sides of an end of the first magnetic core away from the pen tip, and the protrusions are matched and fixed with the grooves.

[0008] Preferably, a first straight groove is provided on the side of the second magnetic core away from the pen head, the electromagnetic pen further comprises a push rod for inserting the pen core, the first straight groove is fixedly cooperated with the push rod, and the pen core is inserted into the first magnetic core, the second magnetic core and the push rod in sequence.

[0009] Preferably, two side holes are arranged at one end of the seat bin away from the pen tip, columnar protrusions are arranged on both sides of the push rod, and the side holes are respectively assembled with the columnar protrusions.

[0010] Preferably, a second straight groove and a blind hole are provided on the side of the push rod close to the pen tip, the end of the push rod away from the pen tip is a smooth end surface, and the pen core is inserted into the blind hole.

[0011] Preferably, a third straight groove is provided on the side of the seat bin close to the pen tip, and the protrusion of the first magnetic core enters the seat bin through the third straight groove and is fixed to the groove.

[0012] The present invention also provides a processing device, which includes a mold for injection molding a seat chamber and fixing the magnetic core to the seat chamber, the mold includes an upper mold assembly and a lower mold assembly arranged in cooperation with the upper mold assembly;

[0013] The upper mold assembly comprises an upper mold base and an upper mold pad which are stacked in sequence from top to bottom, an upper mold plate which is embedded in the upper mold pad on a side close to the lower mold assembly, and a glue injection port which passes through the upper mold base, the upper mold pad and the upper mold plate in sequence, and a surface of the upper mold plate which is away from the upper mold pad is provided with a plurality of guide grooves which are connected with the glue injection port;

[0014] The lower mold assembly includes a lower mold base, a lower mold pad and a lower mold fixing plate which are stacked in sequence from bottom to top, and a lower mold plate embedded in the lower mold fixing plate, the lower mold plate is close to the upper mold plate and is provided with a plurality of branch channels corresponding to the plurality of the guide grooves, a wire drum for forming the seat bin and a wire drum needle embedded in the wire drum for fixing the magnetic core, the magnetic core is sleeved on the upper part of the wire drum needle and the upper end of the magnetic core is tightly fitted with the inner wall of the wire drum, the lower end of the magnetic core and the middle part of the wire drum needle are spaced from the inner wall of the wire drum to form a cavity, one end of the branch channel is connected with the guide groove, and the other end is connected with the cavity.

[0015] Preferably, the number of the guide grooves and the branch channels is two, the guide groove includes a first guide groove and a second guide groove connected to the injection port, and the branch channel includes a first branch channel respectively arranged corresponding to the first guide groove and a second branch channel respectively arranged corresponding to the second guide groove.

[0016] Preferably, the upper mold assembly also includes an elastic soft glue arranged on the side of the upper mold plate close to the lower mold assembly, the elastic soft glue has a central through hole, and the magnetic core is sleeved on the wire tube needle before the mold is closed, and the upper end of the magnetic core abuts the central through hole when the mold is closed.

[0017] The present invention also provides a method for processing an electromagnetic pen, comprising providing the aforementioned processing equipment and a first magnetic core, and injecting glue to form the seat chamber, wherein the seat chamber and the first magnetic core are integrally connected.

[0018] Compared with the prior art, the electromagnetic pen provided by the present invention is provided with an isolating piece in the seat bin, and a step structure is provided at one end of the second magnetic core close to the pen head, and the thickness of the step structure along the axial direction is less than the thickness of the isolating piece along the axial direction, so that the first magnetic core and the second magnetic core are respectively provided on both sides of the isolating piece, and the first magnetic core and the second magnetic core maintain an accurate distance when not writing, and no film sheet is used, thereby saving manufacturing costs; at the same time, the seat bin is provided with a groove for clamping the first magnetic core to prevent the first magnetic core from rotating; the seat bin is provided with a side hole to clamp with the columnar protrusion of the push rod, and at the same time, the clamping part of the push rod clamps the second magnetic core to prevent the second magnetic core from rotating, thereby realizing the electromagnetic pen The electromagnetic frequency changes stably during use, and can sensitively capture the pressure, trajectory and other information of the user during use, and has a good writing effect; by providing a first guide groove and a second guide groove connected to the injection port, the plastic melt is diverted to the wire tube through the first branch channel and the second branch channel, so that multiple seat chambers can be molded at one time; at the same time, before the mold is closed, the magnetic core is fixed to the middle part of the wire tube needle through the wire tube needle and elastic soft glue, and is spaced apart from the inner wall of the wire tube to form a cavity, and after the mold is opened, the magnetic core and the seat chamber are integrally connected, so that the magnetic core and the seat chamber are tightly assembled, thereby improving the production quality of the electromagnetic pen and the handwriting performance of the electromagnetic pen.

Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0020] Figure 1 It is a schematic diagram of the three-dimensional assembly structure of the electromagnetic pen shown in the present invention;

[0021] Figure 2 for Figure 1 The cross-sectional structure diagram of the electromagnetic pen shown;

[0022] Figure 3 for Figure 1 The three-dimensional exploded structural diagram of the electromagnetic pen shown;

[0023] Figure 4 for Figure 2 A schematic diagram of the three-dimensional structure of the first magnetic core and the housing shown;

[0024] Figure 5 for Figure 4 A schematic cross-sectional structure diagram of the first magnetic core and the housing shown;

[0025] Figure 6 for Figure 2 A schematic diagram of the three-dimensional structure of the second magnetic core shown;

[0026] Figure 7 for Figure 6 A schematic cross-sectional structure diagram of a second magnetic core shown;

[0027] Figure 8 for Figure 2 The schematic diagram of the cross-sectional structure of the housing and the second magnetic core when assembled is shown;

[0028] Fig. 9 for Figure 2 A schematic diagram of the three-dimensional structure of the ejector pin shown;

[0029] Fig.10 for Fig. 9 A schematic cross-sectional structure diagram of the ejector pin shown;

[0030] Fig.11 It is a three-dimensional structural schematic diagram of the mold in the mold closing state shown in the present invention;

[0031] Fig.12 It is a three-dimensional structural schematic diagram of the mold in the mold opening state shown in the present invention;

[0032] Fig.13 for Fig.12A three-dimensional structural schematic diagram of the upper mold assembly from another angle;

[0033] Fig.14 for Fig.11 A schematic cross-sectional structure diagram of the mold shown;

[0034] Fig.15 for Fig.11 A schematic cross-sectional structure diagram of the lower mold assembly is shown. [Specific implementation method]

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] Please refer to Figure 1-Figure 3 ,in Figure 1 is a schematic diagram of a three-dimensional assembly structure of an electromagnetic pen shown in the present invention, Figure 2 yes Figure 1 The cross-sectional structure diagram of the electromagnetic pen shown in FIG. Figure 3 for Figure 1 The electromagnetic pen 100 comprises a hollow pen housing 10 , a pen core 20 and an electromagnetic induction device 30 disposed in the pen housing 10 .

[0037] The pen housing 10 includes an upper housing 11 and a lower housing 12 that cooperate with each other, a silicone jacket 13 sleeved on the lower housing 12, and a button 14 disposed on the surface of the lower housing 12. The pen core 20 includes a pen head 21 for writing.

[0038] The electromagnetic induction device 30 is used to fix the pen core 20 and sense the writing trajectory of the pen core 20. The electromagnetic induction device 30 includes a magnetic core component 31, a seat 32, a bracket 33, a push rod 34, an elastic component 35, a pressure sensing component 36 and a resonant circuit board 37. The pressure sensing component 36 is close to the end of the pen core 20 away from the pen head 21, and the pen core 20 passes through the seat 32.

[0039] The magnetic core assembly 31 includes a first magnetic core 311 near the pen tip 21, a second magnetic core 312, a coil 313 wound around the first magnetic core 311, and a silicone sheath 314 sleeved on one end of the first magnetic core 311 near the pen tip 21. The first magnetic core 311 and the second magnetic core 312 are hollow magnetic cores, and the first magnetic core 311 has a first through hole 3111 for the pen tip 20 to pass through. The second magnetic core 312 is arranged at the end of the first magnetic core 311 away from the pen tip 21, and has a second through hole 3121 for the pen tip 20 to pass through. One end of the first magnetic core 311 and the second magnetic core 312 are accommodated in the seat 32. The pen tip 20 passes through the silicone sheath 314, the first magnetic core 311, and the second magnetic core 312 in sequence. The silicone sheath 314 is used to protect the first magnetic core 311 and play a role in shock and drop prevention. Particularly, the inner diameter of the first through hole 3111 is greater than the inner diameter of the second through hole 3121 , and the pen core 20 is correspondingly formed into a step structure, so that the pen core 20 pushes the second magnetic core 312 to move axially during writing.

[0040] Please refer to Figure 1-Figure 5 , Figure 4 for Figure 2 The three-dimensional structural diagram of the first magnetic core and the housing is shown in FIG. Figure 5 for Figure 4 The schematic diagram of the cross-sectional structure of the first magnetic core and the seat chamber is shown. An isolating member 321 is provided on the inner wall surface of the seat chamber 32, and the first magnetic core 311 and the second magnetic core 312 are at least partially accommodated in the seat chamber 32 and are respectively arranged on both sides of the isolating member 321. Specifically, the seat chamber 32 includes a first space 322 for accommodating one end of the first magnetic core 311, a second space 323 surrounded by the isolating member 321, and a third space 324 for accommodating the second magnetic core 312. In particular, in this embodiment, the isolating member 321 is a convex structure.

[0041] In particular, two grooves 325 are provided on the side of the seat bin 32 close to the pen tip 21, and two protrusions 3112 are provided on both sides of the first magnetic core 311 away from the end of the pen tip 20, and the protrusions 3112 are fixed in cooperation with the grooves 325 to achieve that the first magnetic core 311 is fixed when writing, and the first magnetic core 311 can be placed before the injection molding of the seat bin 32. In other embodiments, a third straight groove (not shown) is provided on the side of the seat bin 32 close to the pen tip 21, and the protrusions 3112 of the first magnetic core 311 enter the seat bin 32 through the third straight groove and then rotate to be fixed to the grooves 325.

[0042] A thread structure 326 is disposed on the outer surface of one end of the housing 32 away from the pen tip 21 , and the thread structure 326 is used to achieve threaded fit and fixation with the bracket 33 .

[0043] Please refer to Figure 6-Figure 8 , Figure 6 is a schematic diagram of the three-dimensional structure of the second magnetic core, Figure 7 yes Figure 6 The cross-sectional structure diagram of the second magnetic core shown in FIG. Figure 8 for Figure 2 The schematic diagram of the cross-sectional structure of the seat compartment and the second magnetic core when assembled is shown. The second magnetic core 312 is provided with a step structure 3122 near the end of the pen tip 21, and the step structure 3122 abuts against the isolation member 321 to prevent the first magnetic core 311 and the second magnetic core 312 from being too far apart. At the same time, the axial thickness H2 of the step structure 3122 is less than the axial thickness H1 of the isolation member 321 to prevent the first magnetic core 311 from directly abutting against the second magnetic core 312, so that the electromagnetic pen 100 maintains a fixed and accurate distance when not writing, and the distance is: H=H1-H2. The second magnetic core 312 also includes a first straight groove structure 3123 provided at an end away from the pen tip 21, and the first straight groove 3123 is used to cooperate with the push rod 34 to play an anti-rotation role.

[0044] Please refer to Figure 9-10 , Fig. 9 for Figure 2 The three-dimensional structural diagram of the top rod shown in FIG. Fig.10 for Fig. 9 The schematic diagram of the cross-sectional structure of the push rod is shown. The push rod 34 is provided with a snap-fitting portion 341 assembled with the first straight groove 3123, a columnar protrusion 342, a second straight groove 343, a blind hole 344 and a smooth end surface 345. The snap-fitting portion 341 is used to assemble with the first straight groove 3123 of the second magnetic core 312 to prevent the second magnetic core 312 from rotating. The columnar protrusion 342 is arranged on both sides of the push rod 34, and two side holes 327 are also arranged at the end of the seat bin 32 away from the pen head 21, and the side holes 327 are respectively assembled with the columnar protrusion 342. The columnar protrusion 342 can be snapped into the side hole 327 to prevent the push rod 34 from rotating, and at the same time limit the push rod 34 to limit the maximum stroke of the push rod 34. The second straight groove 343 and the blind hole 344 are arranged at an end of the push rod 34 close to the pen tip 21, and the smooth end surface 345 is arranged at an end of the push rod 35 away from the pen tip 21. The pen core 20 is inserted into the blind hole 344, and the second straight groove 343 is used to provide deformation and clearance for the pen core 20, and the smooth end surface 345 abuts against the elastic component 35.

[0045] The pressure sensing component 36 includes a pressure sensing substrate 361 and a silicone pad 362. The pressure sensing substrate 361 is fixed on the substrate, and the pressure sensing substrate 361 and the pen core 20, the first magnetic core 311, the second magnetic core 312, the seat 32 and the ejector 34 are coaxially arranged. The pressure sensing substrate 361 integrates the capacitive sensor and the substrate into one component, which is convenient for assembly.

[0046] The resonant circuit board 37 is fixed on the bracket 33 , the bracket 33 is snap-fitted to the upper shell 11 , and the pressure sensing component 36 is fixed to a side of the resonant circuit board 37 close to the seat chamber 32 .

[0047] When the electromagnetic pen is not writing, the first magnetic core 311 is engaged with the groove 325 of the seat 32, the first magnetic core 311 is fixed in the seat 32, the second magnetic core 312 abuts against one side of the isolation member 321, and the first magnetic core 311 and the second magnetic core 312 maintain a fixed distance H, where H = H1-H2. When writing, the pen core 20 pushes the second magnetic core 312 to move axially to achieve a change in inductance value.

[0048] Compared with the prior art, the electromagnetic pen provided by the present invention is provided with an isolating member 321 in the seat bin, and a step structure 3122 is provided at one end of the second magnetic core 312 close to the pen head 21, and the axial thickness of the step structure 3122 is less than the axial thickness of the isolating member 321, so that the first magnetic core 311 and the second magnetic core 312 are respectively arranged on both sides of the isolating member 321, and the first magnetic core 311 and the second magnetic core 312 maintain an accurate distance when not writing, and no film is used, thereby saving production costs; at the same time, the seat bin 32 is provided with a groove 325 for engaging the first magnetic core 311 to prevent the first magnetic core 311 from rotating; the seat bin 32 is provided with a side hole 327 to engage with the columnar protrusion 342 of the push rod 34, and at the same time, the engaging portion 341 of the push rod engages with the second magnetic core 312 to prevent the second magnetic core 312 from rotating, so that the electromagnetic frequency changes stably when the electromagnetic pen 100 is used, and the pressure, trajectory and other information of the user during use can be sensitively captured, and the writing effect is good.

[0049] The present invention further provides a method for manufacturing an electromagnetic pen 100, comprising providing a mold and a first magnetic core, and injecting glue to form the seat chamber, wherein the seat chamber and the first magnetic core are integrally connected.

[0050] Please combine Figure 11-Figure 15 The present invention provides a mold 200 for injection molding a housing 230 and fixing a magnetic core 240 to the housing 230 . The mold 200 includes an upper mold assembly 210 and a lower mold assembly 220 that cooperates with the upper mold assembly 210 .

[0051] The upper mold assembly 210 includes an upper mold base 211 and an upper mold pad 212 stacked in sequence from top to bottom, an upper mold plate 213 embedded in the upper mold pad 212 near the lower mold assembly 220, and a glue injection port 214 that sequentially penetrates the upper mold base 211, the upper mold pad 212, and the upper mold plate 213. The upper mold plate 213 is provided with a plurality of guide grooves connected to the glue injection port 214 on the side away from the upper mold pad 212. Specifically, in this embodiment, the number of the guide grooves is two, and the guide grooves include a first guide groove 2131 and a second guide groove 2132 connected to the glue injection port 214.

[0052] The lower mold assembly 220 includes a stacked lower mold base 221, a lower mold pad 222, and a lower mold fixing plate 223, and a lower mold plate 224 embedded in the lower mold fixing plate 223. The lower mold plate 224 is provided with a plurality of shunt channels corresponding to the guide grooves on one side close to the upper mold plate 213. Specifically, the shunt channels include a first shunt channel 2214 provided corresponding to the first guide groove 2131 and a second shunt channel 2242 provided corresponding to the second guide groove 2132. The lower mold plate 224 also includes a wire drum 2243 for molding the seat bin 230 and a wire drum needle 2244 embedded in the wire drum 2243 for fixing the magnetic core 240. The first shunt channel 2241 and the second shunt channel 2242 shunt the glue into the wire drum 2243. The magnetic core 240 is sleeved on the upper part 22441 of the wire tube needle 2244 and the upper end of the magnetic core 240 is tightly fitted with the inner wall of the wire tube 2243. The lower end of the magnetic core 240 and the middle part 22442 of the wire tube needle 2244 are spaced apart from the inner wall of the wire tube 2243 to form a cavity. One end of the flow diversion channel is connected to the guide groove, and the other end is connected to the cavity. In particular, the lower part 22443 of the wire tube needle 2244 passes through the lower die seat 221, the lower die pad 222 and the lower die fixing plate 223 in sequence and abuts against one end of the wire tube 2243. The outer diameters of the wire tube needle 2244 are, from large to small, the lower part 22443, the middle part 22442 and the upper part 22441.

[0053] Specifically, in this embodiment, the lower mold plate 224 includes four wire drums 2243, namely, a first wire drum 22431, a second wire drum 22432, a third wire drum 22433 and a fourth wire drum 22434. The four wire drums 2243 are arranged linearly, and the first branch flow channel 2241 and the second branch flow channel 2242 branch the glue to the middle of the wire drum 2243. Specifically, the first branch flow channel 2241 performs branch injection molding on the plastic melt in the middle of the first wire drum 22431 and the second wire drum 22432, respectively, and the second branch flow channel 2242 performs branch injection molding on the plastic melt in the middle of the third wire drum 22433 and the fourth wire drum 22434. The first branch flow channel 2241 and the second branch flow channel 2242 enable the plastic melt to enter the four wire drums 2243 and form four seat chambers 230 in a single mold closing process, so that the injection molding efficiency is high.

[0054] In other embodiments, the wire tube 2243 of the mold 200 provided by the present invention can be of other numbers, and the corresponding guide grooves and branch channels are also provided in corresponding numbers, which is not limited by the present invention.

[0055] In particular, the upper mold assembly 210 also includes an elastic soft glue 2133 with a central through hole arranged on the side of the upper mold plate 213 close to the lower mold assembly 220. Before mold closing, the magnetic core 240 is placed on the side of the wire tube 2243 close to the upper mold plate 213, and the wire tube needle 2244 penetrates the magnetic core 240. When the mold is closed, the magnetic core 240 abuts against the central through hole of the elastic soft glue 2133, and the wire tube needle 2244 penetrates the central through hole. The wire tube needle 2244 is used to fix the magnetic core 240 and penetrate the elastic soft glue 2133. The magnetic core 240 is sleeved on the wire tube needle 2244, and the elastic soft glue 2133 is used to prevent the magnetic core 240 from being crushed when the mold is closed, and to prevent dimensional problems caused by tolerance errors.

[0056] In addition, the lower mold assembly 224 also includes guide columns 2245 arranged at the four corners of the lower mold plate 224, and the upper mold assembly 213 is provided with guide sleeves 2134 corresponding to the guide columns 2245. The guide columns 2245 move up and down along the guide sleeves 2134 to complete the closing and opening of the upper mold plate 213 and the lower mold plate 224, thereby realizing the positioning and guiding of the mold 200.

[0057] The working principle of the mold 200 is as follows: before closing the mold, the magnetic core 240 is sleeved on the wire tube needle 2243 and the lower end of the magnetic core 240 is abutted against the middle of the wire tube needle 2244, and then the mold is closed, and the plastic melt is injected from the injection port 214. The plastic melt flows into the first branch channel 2241 and the second branch channel 2243 through the first guide groove 2131 and the second guide groove 2132 respectively and finally flows into the wire tube 2243 until the cavity between the wire tube needle 2244 and the wire tube 2243 is filled, forming a seat bin 230 integrated with the magnetic core 240. After opening the mold, the integrally formed magnetic core 240 and the seat bin 230 can be taken out.

[0058] Compared with the prior art, the present invention provides a first guide groove 2131 and a second guide groove 2132 connected to the injection port 214, and at the same time diverts the plastic melt into the wire tube 2243 through the first branch channel 2241 and the second branch channel 2242, so as to realize one-time molding of multiple seat chambers 230; at the same time, before molding, the magnetic core 240 is fixed to the middle part of the wire tube needle 2244 by the wire tube needle 2244 and the elastic soft glue 2133 and is spaced apart from the inner wall of the wire tube 2243 to form a cavity, and after opening the mold, the magnetic core 240 and the seat chamber 230 that are integrally connected are obtained, so that the magnetic core 240 and the seat chamber 230 are tightly assembled, thereby improving the production quality of the electromagnetic pen and improving the handwriting performance of the electromagnetic pen.

[0059] The above description is only an implementation mode of the present invention. It should be pointed out that, for ordinary technicians in this field, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. An electromagnetic pen, characterized in that: include: The pen core includes a pen tip disposed at the end thereof; a first magnetic core having a first through hole; a second magnetic core having a second through hole, which is arranged at an end of the first magnetic core away from the pen tip, the inner diameter of the second through hole is smaller than the inner diameter of the first through hole, the pen core passes through the first through hole and the second through hole in sequence, and a step structure is arranged at an end of the second magnetic core close to the pen tip; Seat bin: An isolating member is provided on the inner wall of the seat bin, the first magnetic core and the second magnetic core are at least partially accommodated in the seat bin and the first magnetic core and the second magnetic core are respectively located on both sides of the isolating member, the isolating member abuts against the step structure, the isolating member is a raised structure, enclosing a second space, the step structure is inserted into the second space, along the length direction of the pen core, the thickness of the step structure is smaller than the thickness of the isolating member, and the height of the step structure is smaller than the height of the second space.

2. The electromagnetic pen according to claim 1, characterized in that: Two grooves are arranged on one side of the seat bin close to the pen tip, and two protrusions are arranged on both sides of one end of the first magnetic core away from the pen tip, and the protrusions are matched and fixed with the grooves.

3. The electromagnetic pen according to claim 1, characterized in that: A first straight groove is arranged on the side of the second magnetic core away from the pen head. The electromagnetic pen also includes a push rod for inserting the pen core. The first straight groove is fixedly matched with the push rod. The pen core is inserted into the first magnetic core, the second magnetic core and the push rod in sequence.

4. The electromagnetic pen according to claim 3, characterized in that: Two side holes are arranged at one end of the seat away from the pen head, columnar protrusions are arranged on both sides of the push rod, and the side holes are respectively assembled with the columnar protrusions.

5. The electromagnetic pen according to claim 3, characterized in that: A second straight groove and a blind hole are arranged on one side of the push rod close to the pen tip, an end of the push rod away from the pen tip is a smooth end surface, and the pen core is inserted into the blind hole.

6. The electromagnetic pen according to claim 2, characterized in that: A third straight groove is arranged on a side of the seat bin close to the pen tip, and the protrusion of the first magnetic core enters the seat bin through the third straight groove and is fixed to the groove.

7. A processing device, comprising a mold for manufacturing a seat chamber of an electromagnetic pen according to any one of claims 1 to 6, used for injection molding to form the seat chamber and fixing the magnetic core to the seat chamber, characterized in that: The mold comprises an upper mold assembly and a lower mold assembly arranged in cooperation with the upper mold assembly; The upper mold assembly comprises an upper mold base and an upper mold pad which are stacked in sequence from top to bottom, an upper mold plate which is embedded in the upper mold pad on a side close to the lower mold assembly, and a glue injection port which passes through the upper mold base, the upper mold pad and the upper mold plate in sequence, and a surface of the upper mold plate which is away from the upper mold pad is provided with a plurality of guide grooves which are connected with the glue injection port; The lower mold assembly includes a lower mold base, a lower mold pad and a lower mold fixing plate which are stacked in sequence from bottom to top, and a lower mold plate embedded in the lower mold fixing plate, the lower mold plate is close to the upper mold plate and is provided with a plurality of branch channels corresponding to the plurality of the guide grooves, a wire drum for forming the seat bin and a wire drum needle embedded in the wire drum for fixing the magnetic core, the magnetic core is sleeved on the upper part of the wire drum needle and the upper end of the magnetic core is tightly fitted with the inner wall of the wire drum, the lower end of the magnetic core and the middle part of the wire drum needle are spaced from the inner wall of the wire drum to form a cavity, one end of the branch channel is connected with the guide groove, and the other end is connected with the cavity.

8. The processing equipment according to claim 7, characterized in that: The number of the guide grooves and the branch channels is two, the guide grooves include a first guide groove and a second guide groove connected to the injection port, and the branch channels include a first branch channel respectively arranged corresponding to the first guide groove and a second branch channel respectively arranged corresponding to the second guide groove.

9. The processing equipment according to claim 7, characterized in that: The upper mold assembly also includes an elastic soft glue arranged on the side of the upper mold plate close to the lower mold assembly, and the elastic soft glue has a central through hole. Before the mold is closed, the magnetic core is sleeved on the wire tube needle, and the upper end of the magnetic core abuts against the central through hole when the mold is closed.

10. A method for processing an electromagnetic pen according to any one of claims 1 to 6, characterized in that: It includes providing the first magnetic core and the processing equipment described in any one of claims 7-9, and injecting the seat bin into shape, wherein the seat bin and the first magnetic core are integrally connected.

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