TWI652601B - Pointing device - Google Patents

Abstract

An indicator includes a housing, a first electromagnetic unit, a second electromagnetic unit, a first elastic member, and a writing head. The housing has a receiving space and a port, and the port communicates with the receiving space. The first electromagnetic unit includes a first magnet and a coil, and the first magnet is fixedly disposed in the accommodating space, and the coil is wound around the first magnet. The second electromagnetic unit is axially displaceably disposed in the accommodating space of the housing, the second electromagnetic unit includes a second magnet and a protection member, and the protection member covers the second magnet, and the second magnet is relatively far away from or close to the first magnet. The elastic member is disposed on the housing and can provide an elastic force to the second electromagnetic unit in the axial direction. The pen tip is displaceably disposed at a port of the housing and coupled to the protector.

Description

Indicator

The embodiment of the invention relates to an indicator, in particular to an electromagnetic induction indicator.

According to the development of technology, more and more electronic devices use touch panels as control interfaces, such as smart phones, tablets or personal digital assistants (PDAs), etc., for users to operate by touch. And improve convenience. In addition, in order to make the process of operating the touch panel faster and more accurate, it is also possible to input with a pen type indicator (for example, writing or clicking).

The form of the indicator depends on the touch mode of the touch panel. Currently, the touch panels of the touch panel that are widely used are resistive, capacitive, and electromagnetic. Among them, the electromagnetic touch technology mainly uses the Digitizer Tablet to detect the electromagnetic signal emitted by the indicator to form a handwriting. In use, the indicator can generate different electromagnetic signals due to different pressures of the pressure of the pen tip, and the Digitizer Tablet calculates the position of the indicator and the pressure of the brush according to the electromagnetic signal sensed by an appropriate algorithm. . How to improve the position coordinates of the electromagnetic indicator and the Accuracy and Resolution are one of the performances that those skilled in the art desire to improve.

The present invention provides an indicator device whose purpose is to reduce the variation value of the sensing signal from the ideal value.

For the purpose of prior art, the present invention provides an indicator comprising a housing, a first electromagnetic unit, a second electromagnetic unit, a first elastic member and a writing head. The housing has a receiving space and a port, and the port communicates with the receiving space. The first electromagnetic unit includes a first magnet and a coil, and the first magnet is fixedly disposed in the accommodating space, and the coil is wound around the first magnet. The second electromagnetic unit is axially displaceably disposed in the accommodating space of the housing, the second electromagnetic unit includes a second magnet and a protection member, and the protection member covers the second magnet, and the second magnet is relatively far away from or close to the first magnet. The elastic member is disposed in the accommodating space and can provide an elastic force to the second electromagnetic unit in the axial direction. The pen tip is displaceably disposed at a port of the housing and coupled to the protector.

In the present case, the second electromagnetic unit is formed by the second magnet outer covering protection member, and the second electromagnetic unit is coupled with the writing head. According to this, when the writing head is subjected to the impact force, the protection member can buffer the force by the buffering capacity to avoid the second The magnet is damaged or off-axis, thereby ensuring that the resulting signal changes are as expected, ensuring the positional coordinates of the electromagnetic indicator and the Accuracy and Resolution of the stroke pressure.

Please refer to FIG. 1. FIG. 1 is a cross-sectional view showing the structure of an indicator device according to an embodiment of the present invention. Here, the indicator is a passive or active electromagnetic induction indicator having a circuit unit and used with a tablet.

The indicator shown in FIG. 1 includes a housing 10, a first electromagnetic unit 20, a second electromagnetic unit 30, an elastic member, and a pen tip 50. The housing 10 has an accommodation space 11 and a port 12 that communicates with the accommodation space 11 . The first electromagnetic unit 20 includes a first magnet 21 and a coil 22 wound around the first magnet 21. The first electromagnetic unit 20 is fixedly disposed in the accommodating space 11 . The second electromagnetic unit 30 includes a second magnet 31 and a protection member 32 covering the second magnet 31. The second electromagnetic unit 30 is movably received in the accommodating space 11. The elastic member is disposed on the housing 10 and is capable of providing an elastic force to the second electromagnetic unit 30 in the axial direction X. The pen tip 50 is displaceably disposed at the port 12 and coupled to the protector 32.

Thereby, in use, the tablet emits electromagnetic energy, and the indicator receives the electromagnetic energy emitted by the tablet, and the coil 22 inductively couples the electromagnetic energy. When the indexer acts on the tablet to apply pressure to the pen tip 50, the pen tip 50 drives the second magnet 31 to shift relative to the first magnet 21 to change the inductance value of the coil 22. In this way, the tablet can receive the electromagnetic signal emitted by the indicator, and according to the size and frequency of the electromagnetic signal emitted by the indicator, the appropriate algorithm is used to calculate the position of the indicator and the stroke pressure, thereby generating handwriting. The protection member 32 can provide buffering when the indicator is subjected to an impact force to avoid damage or central axis deviation of the second magnet 31, improve product life, and ensure positional coordinates and stroke pressure accuracy (Accuracy) and fineness of the electromagnetic indicator. Resolution.

In one embodiment, referring to FIG. 1 , the housing 10 is a hollow elongated pen-shaped housing extending in the axial direction X, but is not limited thereto. Herein, the housing 10 has a shape in which one end is open and closed at one end, but is not limited thereto. Further, the accommodating space 11 of the housing 10 is divided into a plurality of sections 111 for correspondingly accommodating the first electromagnetic unit 20, the second electromagnetic unit 30, and the pen tip 50.

More specifically, referring further to FIG. 1, the accommodating space 11 of the casing 10 of the present embodiment is sequentially divided into the first section 111A, the second section 111B, and the third section 111C from the port 12 to the other end. Here, the inner diameter of the first section 111A is smaller than the inner diameter of the second section 111B, and the inner diameter of the second section 111B is smaller than the inner diameter of the third section 111C. Thereby, the first electromagnetic unit 20 corresponds to the position of the third section 111C, the second electromagnetic unit 30 corresponds to the position of the second section 111B, and the pen head 50 corresponds to the position of the first section 111A.

In an embodiment, the first magnet 21 of the first electromagnetic unit 20 is a hollow cylinder, but is not limited thereto. The first magnet 21 has a through hole 211 penetrating both ends of the first magnet 21, and the first magnet 21 has an outer surface 212 and an inner surface 213, and a range surrounded by the inner surface 213 defines a through hole 211. Further, the first magnet 21 of the present embodiment is made of a magnetic material. The coil 22 is wound around the outer surface 212 of the first magnet 21 and is accommodated with the first magnet 21 in the third section 111C. The two ends of the coil 22 can be connected to the circuit unit through two conductive lines, and the circuit unit can be fixedly disposed in the accommodating space 11 (not shown).

The protective member 32 of the second electromagnetic unit 30 may be completely covered or partially covered with the second magnet 31. The second electromagnetic unit 30 is movably received in the accommodating space 11 between the port 12 and the other end of the housing 10 . In addition, the second electromagnetic unit 30 is accommodated in the accommodating space 11, the second magnet 31 is maintained at a position between the port 12 and the first magnet 21, and the head section 321 of the protective member 32 of the second electromagnetic unit 30 is The first magnets 21 have a distance in the axial direction X.

Referring to FIG. 1 again, in an embodiment, the protective member 32 is completely covered by the second magnet 31 in an envelope molding manner, but is not limited thereto. Here, the protection member 32 has a head section 321 and a shaft portion 322. The head section 321 completely covers the second magnet 31, and the shaft portion 322 extends coaxially along the central axis of the second magnet 31 into an elongated structure. The protective member 32 is made of a material having a buffering capacity. For example, the protective member 32 may be made of ABS resin (Acrylonitrile Butadiene Styrene) or a mixture of ABS resin and PC (Polycarbonate, PC), but not limited thereto. The protective effect of the second magnet 31 is achieved by covering the second magnet 31 with the cushioning member 32.

Referring to FIG. 1 and FIG. 2 , in this embodiment, the through hole 211 of the first magnet 21 has a contour range larger than the contour range of the shaft portion 322 of the protection member 32 . More specifically, when the through hole 211 is a circular hole and the shaft portion 322 is a round rod, the diameter value of the through hole 211 is larger than the outer diameter value of the shaft portion 322. When the second electromagnetic unit 30 is received in the accommodating space 11, the head section 321 of the protection member 32 corresponds to the position of the first section 111A and the second section 111B, and the shaft portion 322 of the protection member 32 penetrates the first The through hole 211 of the magnet 21 is thereby reduced in the required outer diameter of the casing to achieve a lightweight structure. In addition, the head section 321 of the protection member 32 is further abutted against the step difference between the first section 111A and the second section 111B, thereby allowing the protection member 32 to be restricted to the movement in the accommodation space 11 and cannot be easily used by the port. 12 out.

In addition, in an embodiment, referring to FIG. 1 and FIG. 2, the second magnet 31 has opposite first ends 311 and second ends 312, and the outer diameter of the first end 311 is larger than the outer diameter of the second end 312, and The first end 311 of the two magnets 31 is closer to the first magnet 21 than the second end 312, that is, the second end 312 of the second magnet 31 is closer to the port 12 than the first end 311. Thereby, since the second end 312 of the second magnet 31 is smaller in size than the first end 311, the size of the protective member 32 covering the second magnet 31 is also reduced. Since the pen tip 50 of the indicator has a tapered tapered tip 51, the second magnet 31 of the second electromagnetic unit 30 of the embodiment can penetrate the pen tip 50 with its second end 312 and make as much as possible The second magnet 31 is adjacent to the tapered tip 51. Based on this, the indicator of the embodiment can be closer to the tablet when in use, thereby improving the accuracy and stability of the coordinate and pressure gradient of the pointer of the indicator pen.

Further, referring to FIG. 1 and FIG. 2, the first end 311 and the second end 312 of the second magnet 31 may have a plurality of stages 313, and each stage 313 may be a slope with a slope, a straight section with a zero slope, or The surface having no slope, and the stage 313 between the first end 311 and the second end 312 of the second magnet 31 may be selected from the above-described structural configuration or combination. The phase 313 between the first end 311 and the second end 312 of the second magnet 31 is combined with the structural configuration described above without departing from the outer diameter of the first end 311 being greater than the outer diameter of the second end 312. In the embodiment of FIG. 1, the first end 311 and the second end 312 of the second magnet 31 include a straight segment and a curved surface with a slope of zero.

Further, referring further to FIGS. 1 and 2, the second end 312 of the second magnet 31 is spherical and the second end 312 of the second magnet 31 faces the port 12. Therefore, when the indexer is accidentally dropped or subjected to an impact force at the port 12, the second magnet 31 receives the impact force by the cushioning ability of the material of the protective member 32, and the second magnet 31 is spherically second. The end 312 can avoid the phenomenon of stress concentration of the second end 312 of the second magnet 31, and can further avoid the damage of the second magnet 31 due to the impact force, thereby further prolonging the product life.

The elastic member may be a compression spring, a tension spring or other elastic material made of a resilient material. Referring to FIG. 1 and FIG. 2, the elastic member includes a first elastic member 40. The first elastic member 40 may be a general coil spring, a conical spring, a disc spring or other elastic material having compressibility. And the first elastic member 40 may directly or indirectly abut against the second electromagnetic unit 30 to provide the second electromagnetic unit 30 with an elastic force in the axial direction X. The pen tip 50 is movably disposed at the port 12 of the housing 10 and coupled to the protector 32. Here, the pen tip 50 is partially corresponding to the first segment 111A of the accommodating space 11 of the housing 10, and the tapered pen tip 51 protrudes from the port 12 for index control.

Based on this, when the writing head 50 is pressed, the second electromagnetic unit 30 can be elastically displaced relative to the first electromagnetic unit 20, and can automatically return to the initial position when the pressure is released.

Further, to ensure that the indexer can change the relative position between the second magnet 31 and the first magnet 21 within the allowable displacement range of its tip 50. The first elastic member 40 has an elastic compression length, and the distance between the second electromagnetic unit 30 and the first electromagnetic unit 20 in the axial direction X is the length of the writing head displacement. The elastic compression length of the first elastic member 40 of the embodiment is greater than the displacement of the writing head. length. Accordingly, the tip 50 of the indexer can be pressed against the displacement of the first elastic member 40 within the structurally allowed displacement range. In this way, during the use of the indicator, the pen tip 50 of the indicator can be pushed back to the initial position by the elastic restoring force of the first elastic member 40 after being compressed, thereby ensuring that the electromagnetic induction value can also be Revert to the initial value for the next use.

Further, with reference to FIG. 1 and FIG. 2 , in order to improve the stability of the overall structure and facilitate the positioning of the first magnet 21 , the first fixing member 60 is further included, and the first fixing member 60 is fixed to the receiving space of the housing 10 . 11 inside. Here, the first fixing member 60 has a recessed hole 61, a shaft hole 62 and a limiting groove 63. The recessed hole 61 communicates with the limiting groove 63 through the shaft hole 62. More specifically, the recessed hole 61 is shaped to accommodate the shape of the outer peripheral contour of the first magnet 21, and the inner peripheral contour of the shaft hole 62 is the same as the inner peripheral contour of the through hole 211. Therefore, one end of the first magnet 21 can abut against the recessed hole 61, and one end of the coil 22 can abut against one end surface of the first fixing member 60, and the protective member 32 of the second electromagnetic unit 30 The shaft portion 322 extends into the limiting groove 63 through the shaft hole 62.

The second electromagnetic unit 30 further includes a shaft support member 33. The outer contour of the shaft support member 33 has a shape size smaller than the inner circumferential contour size of the limit groove 63, and the outer contour of the shaft support member 33 is larger than the outer diameter of the shaft portion 322. The shaft portion supporting member 33 is received in the limiting groove 63 and displaceable in the axial direction X in the limiting groove 63. One end of the shaft portion 322 of the protecting member 32 extending into the limiting groove 63 is coupled to the shaft portion supporting member 33. The inner position of the first elastic member 40 abuts against the first fixing member 60 and the other end abuts against the shaft supporting member 33. Thereby, the first elastic member 40 generates an elastic force to the second electromagnetic unit 30 through the shaft supporting member 33, thereby ensuring that the writing head 50 has an elastic restoring force during the entire touch process.

In addition, in an embodiment, please refer to FIG. 1 and FIG. 2, and further, to ensure the stability of the first elastic member 40 being received in the limiting slot 63, the limiting slot 63 of the first fixing member 60 has more Boss 631. The shaft portion supporting member 33 has a pushing portion 331 and a recess portion 332 which is located on the periphery of the pushing portion 331 and recessed with respect to the pushing portion 331. One end of the first elastic member 40 of the present embodiment passes through the pushing portion 331 and abuts against the concave portion 332 , and the other end is sleeved on the boss 631 and abuts against the inner wall of the limiting groove 63 of the first fixing member 60 . In this way, the first elastic member 40 can be stably located in the limiting groove 63 in cooperation with the boss 631, and ensure that the first elastic member 40 does not cause skew when pressed, and at the same time ensures the displacement path of the second electromagnetic unit 30. And further align the signal changes with the original design concept.

Further, in order to make the indicator have a pressure gradation during use, the elastic member may further comprise a second elastic member 70, wherein the second elastic member 70 is an elastic block. The second elastic member 70 is disposed in the accommodating space 11 and located in a direction in which the second magnet 31 is displaced toward the first magnet 21. When the pen head 50 is not pressed, the second electromagnetic unit 30 and the second elastic member 70 have a distance in the axial direction X. During the displacement of the second electromagnetic unit 30, the second electromagnetic unit 30 is first compressed first. The elastic member 40 then compresses the second elastic member 70. It should be noted that, in providing the elastic restoring force of the pen tip 50, it may be selected to simultaneously provide the first elastic member 40 and the second elastic member 70, or only one of the first elastic member 40 or the second elastic member 70.

The second elastic member 70 of the present embodiment is disposed in the accommodating space 11 of the housing 10 and is located in the extending direction of the central axial direction X of the housing 10, but is not limited thereto. In this example, the second elastic member 70 is located between the end of the shaft portion 322 of the protector 32 away from the port 12 and the other end of the housing 10. Herein, the second elastic member 70 may be made of a rubber material having a different elastic modulus from the first elastic member 40 or other elastic restoring force, thereby being restored to the original state after being compressed and providing the second electromagnetic unit. 30 elastic reset strength.

More specifically, the one side of the second elastic member 70 of the present embodiment facing the shaft portion supporting member 33 is a flat surface. In this way, the second electromagnetic unit 30 is pressed against the second elastic member 70 through the shaft supporting member 33, and transmits through the corresponding shape between the shaft supporting member 33 and the limiting groove 63, so that the shaft supporting member 33 is displaced. Limited by the limiting groove 63, it can be stably and obliquely displaced in the axial direction X, ensuring that the second electromagnetic unit 30 is displaced along the stable displacement path, thereby obtaining consistent actuation and variation effects.

In an embodiment, referring to FIG. 1 and FIG. 2, the pen tip 50 has a sleeve 52. A portion of the head section 321 of the protector 32 is embedded in the sleeve 52 of the pen tip 50 to be coupled with the pen tip 50. More specifically, the head section 321 of the protection member 32 of the present embodiment has a head end 3211, a neck section 3212, a first body section 3213, and a second body section 3214 that are sequentially engaged. The head end 3211 has a spherical configuration, the head end 3211 is smoothly necked to the neck section 3212, the neck section 3212 is gradually expanded into the first body section 3213, and the first body section 3213 is expanded to the second body section 3214. The shape of the sleeve 52 of the pen head 50 corresponds to the outer contour shape of the head end 3121, the neck section 3212 and the first body section 3213 of the head section 321 of the protection member 32. Thereby, the pen tip 50 can be detachably assembled to the head section 321 of the protection member 32 through the sleeve 52, and can be used for the user to replace the required pen head 50 when the pen tip is worn or deformed, so as to achieve the detachable pen tip. The purpose of 50, and thereby maintain the best writing feel.

Further, since the head section 321 of the protector 32 has different outer contours of the head end 3211, the neck section 3212 and the first body section 3213. Here, after the pen tip 50 is sleeved on the protection member 32, the most necked neck portion 3212 can limit the displacement of the outer end of the neck portion 3212 and the displacement of the first leg portion 3213, thereby preventing the pen tip 50 from falling off and improving. Structural stability.

Please refer to FIG. 3 and FIG. 4 for another embodiment of the present invention. FIG. 4 is a schematic view showing the state of use of the pen head 50 of the embodiment of FIG. This embodiment is substantially the same as the structural configuration of the embodiment of FIGS. 1 and 2 and will not be described again. The following only describes the differences.

Referring to FIG. 3 and FIG. 4 , in this embodiment, the second elastic member 70 has a notch 71 on a side of the boss 631 , and a convex portion 6311 on a surface of the boss 631 facing the second elastic member 70 . In this way, the second elastic member 70 is sleeved and positioned on the convex portion 6311 of the boss 631 by the recess 71, whereby the second elastic member 70 is more stably positioned in the limiting groove 63, and similarly It is possible to ensure that the displacement path of the second electromagnetic unit 30 of the second elastic member 70 is applied, so that the change of the signal is consistent with the original design concept.

In addition, in this embodiment, the first end 311 to the second end 312 of the second magnet 31 include a straight segment having a slope of zero and a slope having a slope, and the profile of the second end 312 is It is the shape of a trapezoid.

Next, please refer to FIG. 5 and FIG. 6 for a cross-sectional view of another embodiment of the present invention. Fig. 6 is a view showing a state in which the pen tip 50 of the embodiment of Fig. 5 is pressed. The embodiment of Figures 5 and 6 is substantially the same as the foregoing embodiment and will not be described again. The following only describes the differences.

Referring to FIG. 5 and FIG. 6 , in this embodiment, the head section 321 and the shaft portion 322 of the protection member 32 of the second electromagnetic unit 30 are two separate components, and the head section 321 and the shaft section 322 may be different or The same material is used, and in the structural configuration, the shaft portion 322 is also abutted against the head portion 321 and the shaft portion supporting member 33 to achieve the same purpose and effect as the foregoing embodiment.

In addition, in this embodiment, the boss 631 of the first fixing member 60 has a groove 6312, and the second elastic member 70 is inserted into the groove 6312, thereby maintaining the stability of the second elastic member 70 and achieving The same objects or effects of the foregoing embodiments.

Next, please refer to FIG. 7 and FIG. 8 together for a cross-sectional view of another embodiment of the present invention. Fig. 8 is a view showing the state in which the pen tip 50 of the embodiment of Fig. 7 is pressed. The main difference from the foregoing embodiments is that the first magnet 21 of the first electromagnetic unit 20 of the indicator of FIGS. 7 and 8 is a solid cylinder structure, and the protection member 32 of the second electromagnetic unit 30 has only the head section 321 , and The second elastic member 70 is disposed between the first electromagnetic unit 20 and the second electromagnetic unit 30. Further, the second fixing member 80 may be disposed to cooperate to securely position the first magnet 21 of the first electromagnetic unit 20.

In this embodiment, referring to FIG. 7 , the protection member 32 of the second electromagnetic unit 30 partially covers the second magnet 31 . Specifically, the protector 32 covers the second magnet 31 with the head section 321 . The head section 321 of the protection member 32 has a sleeve groove 323. The sleeve groove 323 has a sleeve slot 3231. The shape of the sleeve groove 323 corresponds to the shape of the second magnet 31, and the shape dimension of the sleeve slot 3231 corresponds to the second magnet 31. The first end 311 is sized such that the second magnet 31 is inserted into the sleeve 323 by the sleeve slot 3231. In addition, in this embodiment, the second elastic member 70 is fixed to the first end 311 of the second magnet 31 and is received in the sleeve 323 and located between the first magnet 21 and the second magnet 31.

Further, the second fixing member 80 is fixedly disposed in the accommodating space 11 of the housing 10. The second fixing member 80 has a limiting slot 81. The limiting slot 81 includes a first slot segment 811 and a second slot. In the segment 812 and the third slot segment 813, the first slot segment 811 is engaged with the slot opening, the third slot segment 813 is engaged with the slot bottom, and the second slot segment 812 is coupled to the first slot segment 811 and the third slot segment 813. Therefore, the first magnet 21 of the first electromagnetic unit 20 is inserted into the third groove section 813 and abuts against the groove bottom of the limiting groove 81. The coil 22 is wound around the first magnet 21 and can abut the step difference between the third slot section 813 and the second slot section 812. One end of the first elastic member 40 can pass through the first magnet 21 and the coil 22 and abut against the step of the first slot segment 811 and the second slot segment 812. As a result, the first magnet 21, the coil 22, and the first elastic member 40 of the first electromagnetic unit 20 can be stably restricted to the second fixing member 80. Further, the outer peripheral surface of the head section 321 of the protection member 32 is further recessed to abut the abutment edge 3215, so that the other end of the first elastic member 40 can abut against the abutting edge 3215.

Thereby, when the indicator is used and pressed to the pen tip 50, the pen tip 50 drives the head segment 321 of the protection member 32 of the second electromagnetic unit 30 to move into the casing 10 in the axial direction X, and the head segment 321 of the protection member 32 drives. The second magnet 31 and the second elastic member 70 are displaced, thereby changing the relative position between the first magnet 21 and the second magnet 31, and the effect of changing the electromagnetic frequency to simulate the stroke pressure is achieved. The protector 32 can provide a cushioning ability to protect the second magnet 31 from damage when the indicator is subjected to an impact force, and to ensure that its position is not offset to affect the sensing. In addition, the first elastic member 40 can also maintain the ability of the second electromagnetic unit 30 to elastically displace, ensuring smooth operation.

Next, please refer to FIG. 9 and FIG. 10 for a cross-sectional view of still another embodiment of the indicator device of the present invention. Fig. 10 is a view showing the state in which the pen tip 50 of the embodiment of Fig. 9 is pressed. The embodiment of Figures 9 and 10 is substantially the same as the embodiment shown in Figures 7 and 8 and will not be described again. The following only describes the differences.

Referring to FIG. 9 and FIG. 10, in the embodiment, the sleeve 323 of the protection member 32 further has a retaining edge 3232. The retaining edge 3232 is located on the inner circumferential surface of the sleeve 323, and the retaining edge 3232 is located at the sleeve 3231 and the sleeve. Between the groove bottoms of the grooves 323, in addition, the inner peripheral contour of the retaining edge 3232 is smaller than the outer peripheral contour of the first end 311 of the second magnet 31. As a result, the second magnet 31 is received between the groove bottom of the sleeve groove 323 and the retaining edge 3232, and the second elastic member 70 is inserted into the inner contour of the retaining edge 3232 and combined with the second magnet 31. In this way, the second magnet 31 and the second elastic member 70 can be positioned more stably, improving structural stability and sensing accuracy.

Next, please refer to FIG. 11 and FIG. 12 together for a cross-sectional view of still another embodiment of the indicator device of the present invention. Fig. 12 is a view showing the state in which the pen tip 50 of the embodiment of Fig. 11 is pressed. The embodiment of Figures 11 and 12 is substantially the same as the embodiment shown in Figures 7 and 8 and will not be described again. The following only describes the differences.

Referring to FIG. 11 and FIG. 12, in this embodiment, the head segment 321 further has an end edge 3233, and the end edge 3233 is located on the other end surface of the head segment 321 different from the head end 3211. Here, the second magnet 31 is received in the sleeve 323, and the second elastic member 70 has a through hole 72 at the center thereof. The second elastic member 70 is disposed in the end edge 3233 and communicates the through hole 72 with the sleeve opening 3231. In addition, the limiting slot 81 of the second fixing member 80 of the embodiment includes only the second slot segment 812 and the third slot segment 813. The third slot segment 813 engages the slot bottom, and the second slot segment 812 and the third slot segment 813 and the slot opening are engaged, and the outer end surface of the second fixing member 80 having the slot opening further has an outer ring groove 814.

Therefore, the first magnet 21 is inserted into the third slot section 813 and abuts against the slot bottom of the limiting slot 81 at one end, and the other end protrudes from the slot opening of the limiting slot 81 and passes through the second elastic member 70. The perforations 72 penetrate into the sleeve 323 of the head section 321. The coil 22 is wound around the first magnet 21 and abuts a step difference between the third slot section 813 and the second slot section 812. One end of the first elastic member 40 is sleeved on the outer peripheral edge of the second fixing member 80 and abuts against the outer ring groove 814 , and the other end abuts against the abutting edge 3215 of the head segment 321 . Thereby, the indicator can achieve the same purpose and effect as the foregoing embodiment.

In some embodiments, the shape of the second magnet 31 of the second electromagnetic unit 30 may have other variations under the basis that the first end 311 is larger than the second end 312, such as shown in FIGS. 13-28. A plurality of stages 313 may be included between the first end 311 and the second end 312 of the second magnet 31, and each stage 313 may be selected from a straight segment with a zero slope, a bevel with a non-zero slope, a curved surface, or a combination.

It can be seen from the above that the embodiments of the present invention completely or partially enclose the protection member 32 of the undefined structure outside the second magnet 31 to protect the second magnet 31 from being damaged or generated when the second magnet 31 is subjected to an impact. The offset ensures the positional coordinates of the electromagnetic indicator and the Accuracy and Resolution of the stroke pressure. In addition, the second magnet 31 is formed such that the first end 311 is larger than the second end 312, so that the second magnet 31 is closer to the port 12 of the housing 10 and the tablet, thereby improving the sensing intensity. The corresponding structure between the pen head 50 and the protection member 32 can be used for the user to replace the pen head 50, thereby improving the degree of freedom of use.

While the present invention has been described above in the foregoing embodiments, it is not intended to limit the invention, and the invention may be modified and modified without departing from the spirit and scope of the invention. The scope of patent protection shall be subject to the definition of the scope of the patent application attached to this specification.

10‧‧‧shell

11‧‧‧ accommodating space

111‧‧‧ Section

111A‧‧‧First section

111B‧‧‧Second section

111C‧‧‧third section

12‧‧‧Port

20‧‧‧First electromagnetic unit

21‧‧‧First magnet

211‧‧‧through hole

212‧‧‧ outer surface

213‧‧‧ inner surface

22‧‧‧ coil

30‧‧‧Second electromagnetic unit

31‧‧‧Second magnet

311‧‧‧ first end

312‧‧‧ second end

313‧‧‧ stage

32‧‧‧protection

321‧‧‧ head

3211‧‧‧ head end

3212‧‧‧ neck section

3213‧‧‧First leg

3214‧‧‧Second section

3215‧‧‧Affinity

322‧‧‧Axis

323‧‧‧ sets of slots

3231‧‧‧ sets of notches

3232‧‧ ‧ rim

3233‧‧‧ edge

33‧‧‧Axis support members

331‧‧‧Pushing Department

332‧‧‧ recess

40‧‧‧First elastic parts

50‧‧‧ pen head

51‧‧‧ nib

52‧‧‧ sets of slots

60‧‧‧First fixture

61‧‧‧ recessed hole

62‧‧‧Axis hole

63‧‧‧Limited slot

631‧‧‧Boss

6311‧‧‧ convex

6312‧‧‧ Groove

70‧‧‧Second elastic parts

71‧‧‧ Notch

72‧‧‧Perforation

80‧‧‧Second fixture

81‧‧‧ Limit slot

811‧‧‧first slot

812‧‧‧Second trough section

813‧‧‧third slot

814‧‧‧ outer ring groove

X‧‧‧ axial

1 is a cross-sectional view showing the structure of an indicator of the present invention. Fig. 2 is a schematic view showing the state of use of the pen tip of Fig. 1 under pressure. 3 is a schematic cross-sectional view showing still another embodiment of the indicator of the present invention. Fig. 4 is a schematic view showing the state of use of the tip of Fig. 3 under pressure. FIG. 5 is a cross-sectional view showing the structure of a pointer according to a further embodiment of the present invention. Fig. 6 is a schematic view showing the state of use of the tip of Fig. 5 under pressure. FIG. 7 is a cross-sectional view showing the structure of another embodiment of the indicator of the present invention. Fig. 8 is a view showing the state of use of the pen tip of Fig. 7 under pressure. FIG. 9 is a cross-sectional view showing the structure of an indicator of the present invention. Fig. 10 is a view showing the state of use of the pen tip of Fig. 9 in a pressurized state. Figure 11 is a cross-sectional view showing the structure of a further embodiment of the indexing device of the present invention. Fig. 12 is a view showing the state of use of the tip of Fig. 11 under pressure. 13 to 28 show other appearances of the second magnet of the indicator of the present invention.

Claims (12)

An indicator comprising: a housing having an accommodating space and a port, the port being connected to the accommodating space; a first electromagnetic unit comprising a first magnet and a coil, wherein the first magnet is fixedly disposed on the In the accommodating space, the coil is wound around the first magnet; a second electromagnetic unit is displaceably disposed in the accommodating space of the housing along an axial direction, and the second electromagnetic unit includes a second a magnet and a protection member covering the second magnet, the second magnet being relatively far from or close to the first magnet; an elastic member disposed on the housing and capable of the second electromagnetic portion along the axial direction The unit provides an elastic force; and a head that is displaceably disposed at the port of the housing and coupled to the protective member. The indexing device of claim 1, wherein the elastic member comprises a first elastic member disposed in the accommodating space, and the first elastic member is a coil spring. The indexing device of claim 2, wherein the elastic member further comprises a second elastic member disposed in the accommodating space and located in a direction in which the second magnet is displaced toward the first magnet, the first The two elastic members are elastic blocks. The indicator device of claim 3, wherein the first elastic member and the second elastic member have different elastic coefficients. The indicator device of claim 1, wherein the second electromagnetic unit and the first electromagnetic unit have a displacement distance in the axial direction, and the elastic member has a compression distance, and the compression distance is greater than the displacement distance. The indexing device of claim 1, wherein the second magnet has an opposite first end and a second end, the first end having an outer diameter greater than an outer diameter of the second end, the first end being adjacent to the first end a first magnet, the second end being adjacent to the tip. The indicator device of claim 1, wherein the pen tip has a groove, the protection member has a head end, and the head end of the protection member is received in the sleeve. The indicator device of claim 7, wherein the head end has a body segment, a neck portion and a head portion that are sequentially engaged, and the outer diameter of the neck portion is smaller than the outer diameter of the body portion and the head portion. The indicator device of claim 3, wherein the first magnet has a hollow structure and has a through hole, the protection member has a head portion and a shaft portion, the head portion covers the second magnet, and the shaft portion penetrates the shaft a through hole, and the head segment and the first magnet have a displacement distance in the axial direction. The indicator device of claim 9, wherein the first elastic member is located on a side of the shaft portion away from the port. The indicator device of claim 3, wherein the first magnet is a solid cylinder, the protection member has a head segment, the head segment encloses the second magnet, and the first magnet and the head segment have a Displacement distance. The indicator device of claim 11, wherein the first elastic member is located between the first electromagnetic unit and the second electromagnetic unit.