JP6793679B2 - pointing device - Google Patents

Description

The present invention relates to a pointing device, and more particularly to an electromagnetic induction pointing device.

With the development of technology, the touch panel is used as a user interface in many electronic devices such as smartphones, tablet computers, and personal digital assistants (PDAs), and the convenience is enhanced by allowing the user to operate the touch panel. In addition, in order to make the operation process of the touch panel quicker and more accurate, it is possible to input in combination with a pen-type pointing device (for example, handwriting or clicking).

The type of pointing device is determined by the touch method of the touch panel. Examples of the touch panel touch method that is relatively widely used at present include a resistive film method, a capacitance method, and an electromagnetic induction method.
Electromagnetic touch technology forms handwriting by detecting an electromagnetic signal emitted from a pointing device, mainly through a digital tablet (Digital Tablet). In use, the pointing device can generate different electromagnetic signals depending on the magnitude of the pressure received from the base of the pen tip, and the position of the pointing device through an appropriate algorithm based on the electromagnetic signal sensed by the digital tablet (Digitizer Tablet). And check the pen pressure. Further, how to improve the position coordinates of the electromagnetic induction type pointing device and the accuracy and resolution of the writing pressure is one of the performances to be improved by those skilled in the art.

An object of the present invention is to provide a pointing device that reduces a change value in which a detection signal deviates from an ideal value.

In order to achieve the above object, the present invention provides a pointing device, and the pointing device includes a housing, a first electromagnetic unit, a second electromagnetic unit, a first elastic member, and a base portion of a pen tip. .. The housing includes a storage space and an opening, and the opening is communicated with the storage space. The first electromagnetic unit includes a first magnetic body and a coil, the first magnetic body is fixed in the accommodation space, and the coil winds around the outside of the first magnetic body. The second electromagnetic unit is movably provided in the accommodation space of the housing along the axial direction, includes a second magnetic body and a protective member, the protective member covers the second magnetic body, and the second magnetic body is the first magnetic body. Can move away from or approach. The elastic member can be provided in the accommodation space and can provide an elastic force to the second electromagnetic unit along the axial direction. The base of the pen tip is movably provided in the opening of the housing and is connected to the protective member.

In the present invention, the second electromagnetic unit is formed by covering the outside of the second magnetic body with a protective member, and the second electromagnetic unit is further connected to the base of the pen tip. Therefore, when the base of the pen tip receives an impact force, the protective member buffers the force received through its buffering capacity to prevent damage to the second magnetic body or misalignment of the axis, thereby generating the pen tip. The signal change is as expected, and the position coordinates of the electromagnetic induction pointing device and the accuracy and resolution of the writing pressure are also ensured.

It is a structural sectional view of the pointing device which concerns on one Example of this invention. It is a schematic diagram which shows the use state when the base part of the pen tip of FIG. 1 receives pressure. It is a structural sectional view of the pointing device which concerns on another Example of this invention. It is a schematic diagram which shows the use state when the base part of the pen tip of FIG. 3 receives pressure. It is a structural sectional view of the pointing device which concerns on the further Example of this invention. It is a schematic diagram which shows the use state when the base part of the pen tip of FIG. 5 receives pressure. It is a structural sectional view of the pointing device which concerns on another Example of this invention. It is a schematic diagram which shows the use state when the base part of the pen tip of FIG. 7 receives pressure. It is a structural sectional view of the pointing device which concerns on one Example of this invention. It is a schematic diagram which shows the use state when the base part of the pen tip of FIG. 9 receives pressure. It is a structural sectional view of the pointing device which concerns on still another Example of this invention. It is a schematic diagram which shows the use state when the base part of the pen tip of FIG. 11 receives pressure. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention. It is another external view of the 2nd magnetic body of the pointing device which concerns on this invention.

See FIG. FIG. 1 is a structural sectional view of a pointing device according to an embodiment of the present invention. The pointing device is a passive or active electromagnetic induction pointing device that comprises a circuit unit and is adapted to the use of a digital tablet.

The pointing device shown in FIG. 1 includes a housing 10, a first electromagnetic unit 20, a second electromagnetic unit 30, an elastic member, and a base portion 50 of a pen tip.
The housing 10 includes a storage space 11 and an opening 12 communicating with the storage space 11. The first electromagnetic unit 20 includes a first magnetic body 21 and a coil 22 that winds the first magnetic body 21. The first electromagnetic unit 20 is fixedly installed in the accommodation space 11. The second electromagnetic unit 30 includes a second magnetic body 31 and a protective member 32 that covers the second magnetic body 31, and is movably accommodated in the accommodation space 11. The elastic member can be provided in the housing 10 and can provide an elastic force to the second electromagnetic unit 30 along the axial direction X. The base portion 50 of the pen tip is movably provided in the opening portion 12 and is connected to the protective member 32.

During use, the digital tablet emits electromagnetic energy, the pointing device receives the electromagnetic energy emitted from the digital tablet, and the coil 22 inductively couples the electromagnetic energy.
The pointing device acts on the digital tablet, and when pressure is applied to the base portion 50 of the pen tip, the base portion 50 of the pen tip moves the second magnetic body 31 with respect to the first magnetic body 21, thereby causing the coil 22. Change the inductance value of. In this way, the digital tablet receives the electromagnetic signal emitted from the pointing device, and the position and writing pressure of the pointing device can be obtained by calculating an appropriate algorithm based on the magnitude and frequency of the electromagnetic signal emitted from the pointing device. , Can generate handwriting. By providing a buffer when the pointing device receives an impact force, the protective member 32 can prevent damage to the second magnetic body 31 or misalignment of the axial center, prolong the product life, and extend the product life and the position coordinates of the electromagnetic induction type pointing device. Ensure the accuracy and resolution of the writing pressure.

In one embodiment, FIG. 1 will continue to be referenced. The housing 10 is an elongated hollow pen-shaped housing that extends in length along the axial direction X, but is not limited thereto. One end of the housing 10 is open and the other end is sealed, but the present invention is not limited to this. Further, the accommodation space 11 of the housing 10 is divided into a plurality of portions 111, and is used for accommodating the first electromagnetic unit 20, the second electromagnetic unit 30, and the base portion 50 of the pen tip.

Further refer to FIG. The accommodation space 11 of the housing 10 of this embodiment is sequentially divided into a first portion 111A, a second portion 111B, and a third portion 111C from the opening 12 toward the other end.
The inner diameter of the first portion 111A is smaller than the inner diameter of the second portion 111B, and the inner diameter of the second portion 111B is smaller than the inner diameter of the third portion 111C. Through this, the first electromagnetic unit 20 is located at the third portion 111C so as to correspond, the second electromagnetic unit 30 is also located at the second portion 111B so as to correspond, and the base portion 50 of the pen tip corresponds. It is located at the first site 111A so as to do so.

In one embodiment, reference is also made to FIG. The first magnetic body 21 of the first electromagnetic unit 20 is a hollow cylinder, but is not limited thereto. The first magnetic body 21 includes through holes 211, through holes 211 penetrate both ends of the first magnetic body 21, and the first magnetic body 21 has an outer surface 212 and an inner surface 213, and the range surrounded by the inner surface 213. The through hole 211 is defined by.
Further, the first magnetic body 21 of this embodiment is manufactured of a magnetic material. The coil 22 winds the outer surface 212 of the first magnetic body 21 and is housed in the third portion 111C together with the first magnetic body 21. Both ends of the coil 22 can be connected to the circuit unit through two conductive wires, and the circuit unit can be fixed in the accommodation space 11 (not shown).

The protective member 32 of the second electromagnetic unit 30 can completely or partially cover the second magnetic body 31. Moreover, the second electromagnetic unit 30 can be accommodated in the accommodation space 11 so as to be movable between the opening 12 and the other end of the housing 10. Further, the second electromagnetic unit 30 is accommodated in the accommodation space 11, holds that the second magnetic body 31 is located between the opening 12 and the first magnetic body 21, and is a protective member of the second electromagnetic unit 30. The distance between the tip portion 321 of 32 and the first magnetic body 21 has a moving distance in the axial direction X.

Next, refer to FIG. 1 again. In one embodiment, the protective member 32 completely covers the outside of the second magnetic body 31 by an embedded injection molding method, but is not limited thereto. The protective member 32 includes a tip portion 321 and a shaft portion 322, the tip portion 321 completely covers the second magnetic body 31, and the shaft portion 322 extends coaxially along the axis of the second magnetic body 31 as an elongated structure. To do.
The protective member 32 is made of a material having a buffering capacity. For example, the protective member 32 can be manufactured of, but is not limited to, ABS resin (Acrylonitril Butadiene Style) or a mixed material of ABS resin and PC plastic (Polycarbonate, PC). By covering the outside of the second magnetic body 31 with the protective member 32 having a buffering capacity, the effect of protecting the second magnetic body 31 is obtained.

See FIGS. 1 and 2. In this embodiment, the contour range of the through hole 211 of the first magnetic body 21 is larger than the contour range of the shaft portion 322 of the protective member 32. More specifically, when the through hole 211 is a round hole and the shaft portion 322 is a round bar, 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 accommodated in the accommodation space 11, the tip portion 321 of the protective member 32 corresponds to the positions of the first portion 111A and the second portion 111B, and the shaft portion 322 of the protective member 32 is the first magnetic body. By inserting the through hole 211 of 21, the object of reducing the required outer diameter of the housing and making the structure compact can be achieved. Further, the tip portion 321 of the protective member 32 is further brought into contact with the stepped portion between the first portion 111A and the second portion 111B, so that the protective member 32 is restrained from moving in the accommodation space 11 and can be easily moved. Prevent it from falling out of the opening 12.

Also, in one embodiment, reference is made to FIGS. 1 and 2. The second magnetic body 31 includes a first end 311 and a second end 312 facing each other, 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 second magnetic body 31 is The second end 312 is closer to the first magnetic body 21 than the second end 312, that is, the second end 312 of the second magnetic body 31 is closer to the opening 12 than the first end 311. Since the size of the second end 312 of the second magnetic body 31 is smaller than that of the first end 311, the size of the protective member 32 that covers the outside of the second magnetic body 31 can also be reduced.
The base portion 50 of the pen tip of the pointing device includes a conical pen tip portion 51 that gradually contracts. As a result, the second magnetic body 31 of the second electromagnetic unit 30 of the present embodiment inserts the second end 312 into the base portion 50 of the pen tip and brings the second magnetic body 31 as close as possible to the conical pen tip portion 51. Through this, the pointing device of the present embodiment can be closer to the digital tablet when used, thereby improving the accuracy and stability of the coordinates and pressure gradient of the pen tip portion 51 of the pointing device. it can.

Further refer to FIGS. 1 and 2. A plurality of staircase portions 313 may be provided between the first end 311 and the second end 312 of the second magnetic body 31, and each staircase portion 313 may have an inclined surface having an inclination ratio, a straight portion having an inclination ratio of zero, or a straight portion having an inclination ratio of zero. The curved surface having no inclination ratio can be formed, and the staircase portion 313 between the first end 311 and the second end 312 of the second magnetic body 31 can be selected from the above structural forms or a combination thereof. The staircase portion 313 between the first end 311 and the second end 312 of the second magnetic body 31 deviates from the premise that the outer diameter of the first end 311 is larger than the outer diameter of the second end 312 when the above structural forms are combined. do not do. In the embodiment of FIG. 1, a straight portion and a curved surface having a zero inclination ratio are included between the first end 311 and the second end 312 of the second magnetic body 31.

Further refer to FIGS. 1 and 2. The second end 312 of the second porcelain 31 is spherical, and the second end 312 of the second porcelain 31 faces the opening 12. Therefore, when the pointing device is inadvertently dropped or receives an impact force from the opening 12, the second magnetic body 31 absorbs the impact force through the buffering capacity of the material itself of the protective member 32, as well as the second magnetic body. By preventing the occurrence of the stress concentration phenomenon on the second end 312 of the second magnetic body 31 by the spherical second end 312 of 31, it is possible to further avoid the situation where the second magnetic body 31 is damaged by the impact force. The life of the product can be extended.

The elastic member can be a compression spring, a tension spring or an elastic body made of another material having elasticity.
See FIGS. 1 and 2. The elastic member includes a first elastic member 40, and the first elastic member 40 can be a general ring-shaped spring, a conical spring, a disc spring, or another elastic material having a compressive capacity. Moreover, since the first elastic member 40 provides the elastic force in the axial direction X to the second electromagnetic unit 30, the first elastic member 40 can directly or indirectly come into contact with the second electromagnetic unit 30.
The base portion 50 of the pen tip is movably provided in the opening 12 of the housing 10 and is connected to the protective member 32. A part of the base portion 50 of the pen tip is located corresponding to the inside of the first portion 111A of the accommodation space 11 of the housing 10, and the cone-shaped pen tip portion 51 projects from the opening 12 to control the pointer. Used.

As a result, when the base portion 50 of the pen tip receives pressure, the second electromagnetic unit 30 can be elastically moved with respect to the first electromagnetic unit 20, and when the pressure is released, the original position is automatically obtained. Can return to.

Further, in order to ensure that the pointing device can change the relative position between the second magnetic body 31 and the first magnetic body 21 within the movement allowable range of the base portion 50 of the pen tip, the first elastic member 40 has an elastic compression length. The distance between the second electromagnetic unit 30 and the first electromagnetic unit 20 in the axial direction X is the moving length of the base of the pen tip, and the elastic compression length of the first elastic member 40 of this embodiment is the pen. It is larger than the moving length of the tip.
Therefore, the base portion 50 of the pen tip of the pointing device can be moved by pressing against the first elastic member 40 within the structurally permissible movement range. In this way, during the process of using the pointing device, after the base 50 of the pen tip of the pointing device is compressed, the second electromagnetic unit 30 is pushed back to its original position via the restoring force of the first elastic member 40, and the electromagnetic induction value is also increased. It can be returned to the initial value and can be used again next time.

Further, FIG. 1 and FIG. 2 will continue to be referred to. In order to improve the stability of the entire structure and position the first magnetic body 21, the first fixture 60 is further included, and the first fixture 60 is fixed in the accommodation space 11 of the housing 10.
The first fixture 60 includes a concave hole 61, a shaft hole 62, and a limiting groove 63, and the concave hole 61 and the limiting groove 63 communicate with each other through the shaft hole 62. Specifically, the shape dimension of the concave hole 61 is a shape dimension that can accommodate the outer peripheral contour of the first magnetic body 21, and the inner peripheral contour of the shaft hole 62 is the same as the inner peripheral contour of the through hole 211. As a result, one end of the first magnetic body 21 can be fixed in position by contacting the concave hole 61, and one end of the coil 22 can be in contact with any one end surface of the first fixture 60, so that the second electromagnetic unit 30 can be fixed. The shaft portion 322 of the protective member 32 is inserted into the limiting groove 63 through the shaft hole 62.

The second electromagnetic unit 30 further includes a shaft support member 33. The shape dimension of the outer contour of the shaft portion support member 33 is smaller than the inner peripheral contour dimension of the limiting groove 63, and the outer contour of the shaft portion support member 33 is larger than the outer diameter of the shaft portion 322. The shaft portion support member 33 is housed in the limiting groove 63 and can move along the axial direction X in the limiting groove 63, and one end of the protective member 32 inserted into the limiting groove 63 of the shaft portion 322 supports the shaft portion. It is coupled to the internal position of the member 33, one end of the first elastic member 40 is in contact with the first fixture 60, and the other end is in contact with the shaft support member 33. Through this, the first elastic member 40 ensures that an elastic force is generated on the second electromagnetic unit 30 through the shaft portion support member 33, and that the base portion 50 of the pen tip has a restoring force during the entire touch operation process. To do.

Also, in one embodiment, reference is made to FIGS. 1 and 2. Further, in order to ensure the stability that the first elastic member 40 is accommodated in the limiting groove 63, the limiting groove 63 of the first fixture 60 further includes a convex base 631. The shaft portion support member 33 includes a pressing portion 331 and a recessed portion 332, and the recessed portion 332 is located on the peripheral edge of the pressing portion 331 and is recessed with respect to the pressing portion 331.
One end of the first elastic member 40 of this embodiment is fitted with a pressing portion 331 and abuts in the recess 332, and the other end is fitted with a convex base 631 and hits the inner wall of the limiting groove 63 of the first fixture 60. Get in touch. In this way, the first elastic member 40 can be stably located in the limiting groove 63 in combination with the convex base 631, and it can be ensured that the first elastic member 40 is not distorted when pressure is applied, and at the same time, the second electromagnetic wave is generated. The movement path of the unit 30 is secured, and the change of the signal matches the concept of the original design.

Further, during the process of using the pointing device, the elastic member may further include a second elastic member 70 in order to expose the pressure gradient, and the second elastic member 70 is an elastic block body. The second elastic member 70 is provided in the accommodation space 11 and is located in the direction in which the second magnetic body 31 moves to and approaches the first magnetic body 21.
When the base portion 50 of the pen tip is not subjected to pressure, the second electromagnetic unit 30 and the second elastic member 70 have a moving distance in the axial direction X, and during the moving process of the second electromagnetic unit 30, The second electromagnetic unit 30 first compresses the first elastic member 40, and then compresses the second elastic member 70. It should also be mentioned that the first elastic member 40 and the second elastic member 70 can be installed at the same time on the surface of providing the restoring force to the base portion 50 of the pen tip, or the first elastic member 40 or the second elastic member 40. Any one of 70 can be selected and provided.

The second elastic member 70 of this embodiment is housed in the housing space 11 of the housing 10 and is located in the extending direction of the central axis of the housing 10, but is not limited thereto. In this embodiment, the second elastic member 70 is located between one end of the protective member 32, which is separated from the opening 12 of the shaft portion 322, and the other end of the housing 10. The second elastic member 70 can be restored to its original state after being compressed by being manufactured of a rubber material having an elastic modulus different from that of the first elastic member 40 or another material having a restoring force, and the second electromagnetic unit 30. Can provide restoring force.

More specifically, the surface of the second elastic member 70 of the present embodiment toward the shaft support 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 portion support member 33, and the shaft portion support member 33 moves through the corresponding shape between the shaft portion support member 33 and the limiting groove 63. It can be moved along the axial direction X so as to be stable and not distorted under the limitation of, and the second electromagnetic unit 30 can be ensured to move along the stable movement path, so that a matching operation and change effect can be obtained. ..

In one embodiment, FIGS. 1 and 2 will continue to be referenced. The base portion 50 of the pen tip includes a fitting groove 52. A part of the tip portion 321 of the protective member 32 is fitted into the fitting groove 52 of the base portion 50 of the pen tip to be coupled to the root portion 50 of the pen tip. More specifically, the tip portion 321 of the protective member 32 of this embodiment includes a head portion 3211, a neck portion 3212, a first skeleton portion 3213, and a second skeleton portion 3214 that are sequentially connected to each other.
The head 3211 has a spherical structure and is smoothly contracted to the neck portion 3212, the neck portion 3212 is gradually expanded to the first skeleton portion 3213, and the staircase portion of the first skeleton portion 3213 is expanded to the second skeleton portion 3214. The shape of the fitting groove 52 of the base portion 50 of the pen tip corresponds to the outer contour shape of the head portion 3211, the neck portion 3212, and the first skeleton portion 3213 of the tip portion 321 of the protective member 32. Through this, the base portion 50 of the pen tip can be detachably incorporated into the tip portion 321 of the protective member 32 through the fitting groove 52, and the pen required by the user when the base portion of the pen tip is worn or deformed. By having the tip of the base 50 replaced by itself and achieving the purpose of replacing the base 50 of the pen tip, the optimum handwriting response can be maintained.

Further, the tip portion 321 of the protective member 32 includes a head portion 3211, a neck portion 3212, and a first skeleton portion 3213 having different outer contours. After the base portion 50 of the pen tip is fitted into the protective member 32, the most contracted neck portion 3212 can restrict the movement of the head portion 3211 and the first skeleton portion 3213 having an outer diameter larger than that of the neck portion 3212. It is possible to prevent the root portion 50 from falling off and improve the stability of the structure.

See FIGS. 3 and 4. This is another embodiment of the present invention, and FIG. 4 is a schematic view showing a usage state when the base portion 50 of the pen tip of FIG. 3 receives pressure. Since this embodiment is almost the same as the structural form of the examples of FIGS. 1 and 2, the description thereof will be omitted here. Hereinafter, only the differences will be described.

See FIGS. 3 and 4. In this embodiment, the recess 71 is provided on the surface of the second elastic member 70 near the convex base 631, and the convex portion 6311 is provided on the surface of the convex base 631 toward the second elastic member 70. In this way, the second elastic member 70 is fixed by externally fitting the convex portion 6311 of the convex base 631 at the recess 71, whereby the second elastic member 70 is more stably fixed in the limiting groove 63. Similarly, the movement path of the second electromagnetic unit 30 that pressurizes the second elastic member 70 can be secured so that the change in the signal matches the concept of the original design.

In addition to this, in the present embodiment, a straight portion having a slope ratio of zero and a slope having a slope ratio are provided between the first end 311 and the second end 312 of the second magnetic body 31, and the second end 312. The cross section of is approximately trapezoidal.

Next, reference is made to FIGS. 5 and 6. This is a structural cross-sectional view of a further embodiment of the present invention. FIG. 6 is a schematic view showing a usage state when the base portion 50 of the pen tip of FIG. 5 receives pressure. Since the examples of FIGS. 5 and 6 are almost the same as those of the above-described embodiment, the description thereof will be omitted here. Hereinafter, only the differences will be described.

See FIGS. 5 and 6. In this embodiment, the tip portion 321 and the shaft portion 322 of the protective member 32 of the second electromagnetic unit 30 are two separate independent members, and the tip portion 321 and the shaft portion 322 are manufactured of different or similar materials, respectively. Can be done. In the structural form, the shaft portion 322 can similarly be brought into contact with the tip portion 321 and the shaft portion support member 33 to achieve the same purpose and effect as in the above embodiment.

Further, in the present embodiment, the convex base 631 of the first fixture 60 is provided with the concave groove 6312, and the second elastic member 70 is inserted into the concave groove 6312 to improve the stability of the second elastic member 70. It can be maintained and has the same purpose and effect as each of the above embodiments.

Next, reference is made to FIGS. 7 and 8. This is a structural cross-sectional view of yet another embodiment of the present invention. FIG. 8 is a schematic view showing a usage state when the base portion 50 of the pen tip of FIG. 7 receives pressure. The main difference from each of the above embodiments is that the first magnetic body 21 of the first electromagnetic unit 20 of the pointing device of FIGS. 7 and 8 has a solid cylindrical structure, and the protective member 32 of the second electromagnetic unit 30 has a tip. Only the portion 321 is provided, and the second elastic member 70 is provided between the first electromagnetic unit 20 and the second electromagnetic unit 30. Further, by providing the second fixture 80, the first magnetic body 21 of the first electromagnetic unit 20 can be fixed.

In this embodiment, reference is made to FIG. A part of the protective member 32 of the second electromagnetic unit 30 covers the second magnetic body 31. Specifically, the protective member 32 covers the second magnetic body 31 with the tip portion 321. The tip portion 321 of the protective member 32 is provided with a fitting groove 323, the fitting groove 323 is provided with a fitting groove opening portion 3231, the shape of the fitting groove 323 corresponds to the shape of the second magnetic body 31, and the fitting groove opening. The shape dimension of the portion 3231 corresponds to the shape dimension of the first end 311 of the second magnetic body 31, and the second magnetic body 31 can be inserted into the fitting groove 323 from the fitting groove opening portion 3231 and fixed. Further, in the present embodiment, the second elastic member 70 is fixed to the first end 311 of the second magnetic body 31 and accommodated in the fitting groove 323, and is positioned between the first magnetic body 21 and the second magnetic body 31. To do.

Further, the second fixture 80 is fixedly installed in the accommodation space 11 of the housing 10. The second fixture 80 includes a limiting groove 81, the limiting groove 81 includes a first section 811, a second section 812, and a third section 813, the first section 811 is connected to the groove opening, and the third section 813. Is connected to the bottom of the groove, and the second section 812 is connected to the first section 811 and the third section 813. Therefore, the first magnetic body 21 of the first electromagnetic unit 20 is inserted into the third section 813 and comes into contact with the groove bottom of the limiting groove 81.
The coil 22 can be wound around the outside of the first magnetic body 21 and can come into contact with a step between the third section 813 and the second section 812. One end of the first elastic member 40 can be fitted with the first magnetic body 21 and the coil 22 and can come into contact with the step between the first section 811 and the second section 812. In this way, the first magnetic body 21, the coil 22, and the first elastic member 40 of the first electromagnetic unit 20 can all be stably limited to the second fixture 80. Further, a contact edge portion 3215 is further recessed in the outer peripheral surface of the tip portion 321 of the protective member 32, and thus the other end of the first elastic member 40 can abut on the contact edge portion 3215.

Through this, when the pointing device is used and the base portion 50 of the pen tip is pressurized, the base portion 50 of the pen tip follows the tip portion 321 of the protective member 32 of the second electromagnetic unit 30 along the axial direction X. The tip portion 321 of the protective member 32 moves the second magnetic body 31 and the second elastic member 70, thereby changing the relative position between the first magnetic body 21 and the second magnetic body 31. The electromagnetic frequency has the effect of simulating pen pressure.
The protective member 32 can provide a buffering capacity when the pointing device receives an impact force to protect the second magnetic body 31 from being damaged, and also ensures that the position of the pointing device is not displaced so as not to affect the detection. Further, the first elastic member 40 also has the ability of elastic movement of the second electromagnetic unit 30 to ensure smooth operation.

Next, reference is made to FIGS. 9 and 10. This is a cross-sectional view of a pointing device according to an embodiment of the present invention. FIG. 10 is a schematic view showing a usage state when the base portion 50 of the pen tip of FIG. 9 receives pressure. Since the examples of FIGS. 9 and 10 are almost the same as the examples shown in FIGS. 7 and 8, the description thereof will be omitted here. Hereinafter, only the differences will be described.

See FIGS. 9 and 10. In this embodiment, the pressing edge 3232 is further provided in the fitting groove 323 of the protective member 32, the pressing edge 3232 is located on the inner peripheral surface of the fitting groove 323, and the pressing edge 3232 is the fitting groove opening portion 3231. It is located between and the bottom of the fitting groove 323. The inner peripheral contour of the holding edge 3232 is smaller than the outer peripheral contour of the first end 311 of the second magnetic body 31. In this way, the second magnetic body 31 is accommodated between the groove bottom of the fitting groove 323 and the pressing edge 3232, and the second elastic member 70 is inserted into the inner contour of the pressing edge 3232 and coupled with the second magnetic body 31. In this way, the second magnetic body 31 and the second elastic member 70 can be fixed more stably, and the stability of the structure and the accuracy of detection can be improved.

Next, reference is made to FIGS. 11 and 12. This is a cross-sectional view of a pointing device according to yet another embodiment of the present invention. FIG. 12 is a schematic view showing a usage state when the base portion 50 of the pen tip of FIG. 11 receives pressure. Since the examples of FIGS. 11 and 12 are almost the same as the examples shown in FIGS. 7 and 8, the description thereof will be omitted here. Hereinafter, only the differences will be described.

See FIGS. 11 and 12. In this embodiment, the tip portion 321 further includes an edge portion 3233, and the end edge portion 3233 is located on the other end surface unlike the head portion 3211 of the tip portion 321. The second magnetic body 31 is housed in the fitting groove 323 and has an insertion hole 72 in the central portion of the second elastic member 70. The second elastic member 70 is provided in the edge portion 3233 and the insertion hole 72 is provided. It communicates with the fitting groove mouth portion 3231.
Further, the limiting groove 81 of the second fixture 80 of this embodiment includes only the second section 812 and the third section 813, the third section 813 is connected to the groove bottom, and the second section 812 is the third section 813 and An outer annular groove 814 is further provided on the outer peripheral surface of one end which is connected to the groove opening and has the groove opening of the second fixture 80.

Therefore, the first magnetic body 21 is inserted into the third section 813 and mortgaged at one end against the groove bottom of the limiting groove 81, and the other end protrudes from the groove opening of the limiting groove 81 to insert the second elastic member 70. It passes through 72 and is inserted into the fitting groove 323 of the tip portion 321. The coil 22 winds around the side of the first magnetic body 21 and comes into contact with the step between the third section 813 and the second section 812. One end of the first elastic member 40 is fitted and inserted into the outer peripheral edge of the second fixture 80 and abuts on the outer annular groove 814, and the other end abuts on the contact edge portion 3215 of the tip portion 321. Through this, the pointing device can similarly achieve the same purpose and effect as in the above embodiment.

In some embodiments, the shape of the second magnetic body 31 of the second electromagnetic unit 30 also has other changes under the base that the first end 311 is larger than the second end 312, and the changes are shown in FIGS. 13 to 13. As shown in FIG. 28. A straight portion having a plurality of stairs 313 between the first end 311 and the second end 312 of the second magnetic body 31 and each stair 313 having a zero inclination, an inclined surface having a non-zero inclination, a curved surface, or them. You can choose from the combinations of.

As can be seen from the above, in each embodiment of the present invention, the second magnetic body 31 is protected by completely or partially covering the outside of the second magnetic body 31 with a protective member 32 whose structural form is not limited. It prevents the magnetic body 31 from being damaged or displaced when it receives an impact, and secures the accuracy (Accuracy) and resolution (Resolution) of the position coordinates and writing pressure of the electromagnetic induction pointing device. Further, in the second magnetic body 31, the detection intensity can be increased by bringing the second magnetic body 31 closer to the opening 12 of the housing 10 and the digital tablet through the embodiment in which the first end 311 is larger than the second end 312. it can. The corresponding structure between the base portion 50 of the pen tip and the protective member 32 can also improve the degree of freedom of use by allowing the user to replace the base portion 50 of the pen tip by himself / herself.

The above description is merely to give the best embodiment of the present invention and does not limit the present invention. Any other modification or substitution of the equivalent effect completed without deviating from the gist disclosed by the present invention is included in the claims described later.

10 Housing 11 Containment space 111 Part 111A 1st part 111B 2nd part 111C 3rd part 12 Opening 20 1st electromagnetic unit 21 1st magnetic body 211 Through hole 212 Outer surface 213 Inner surface 22 Coil 30 2nd electromagnetic unit 31st 2 Magnetic body 311 1st end 312 2nd end 313 Stairs 32 Protective member 321 Tip part 3211 Head 3212 Neck 3213 1st skeleton 3214 2nd skeleton 3215 Contact edge 322 Shaft 323 Fitting groove 3231 Part 3232 Pressing edge 3233 End edge 33 Shaft support member 331 Pressing part 332 Recessed portion 40 First elastic member 50 Pen tip base 51 Pen tip 52 Fitting groove 60 First fixture 61 Concave hole 62 Shaft hole 63 Limit Groove 631 Convex base 6311 Convex 6312 Concave groove 70 Second elastic member 71 Recessed recess 72 Insertion hole 80 Second fixture 81 Restriction groove 811 First section 812 Second section 813 Third section 814 Outer annular groove X-axis direction

Claims (8)

A housing that includes a storage space and an opening, and the opening communicates with the storage space.
The first magnetic body includes a first magnetic body and a coil, the first magnetic body has a hollow structure and has a through hole, the first magnetic body is fixed in the accommodation space, and the coil winds around the outside of the first magnetic body. The first electromagnetic unit to rotate and
Along the axial direction is movable in the accommodation space of the housing, and the second magnet body and a protective member, before Symbol protective member and a distal end portion and a shaft portion, said distal end of said protective member The portion covers the second magnetic body, and the shaft portion inserts the through hole, so that the tip portion and the first magnetic body have a moving distance in the axial direction, and the second magnetic body has a moving distance. A second electromagnetic unit that can move away from or approach the first magnetic body,
An elastic member provided in the housing and capable of providing an elastic force to the second electromagnetic unit along the axial direction.
See containing and a root portion of the pen tip to be connected to the protective member with is movable in the opening of the housing,
The second porcelain has a first end and a second end facing each other, the outer diameter of the first end is larger than the outer diameter of the second end, and the first end is close to the first porcelain. The second end is close to the base of the pen tip .
pointing device. The pointing device according to claim 1, wherein the elastic member includes a first elastic member provided in the accommodation space, and the first elastic member is a ring-shaped spring. The elastic member is provided in the accommodation space, further includes a second elastic member located in a direction in which the second magnetic body moves to and approaches the first magnetic body, and the second elastic member is an elastic block body. The pointing device according to claim 2, wherein the pointing device is provided. The pointing device according to claim 3, wherein the elastic modulus of the first elastic member and the second elastic member are different. The second electromagnetic unit and the first electromagnetic unit have a moving distance in the axial direction, the elastic member has a compression distance, and the compression distance is larger than the movement distance. Item 2. The pointing device according to item 1. The first aspect of claim 1, wherein the base portion of the pen tip is provided with a fitting groove, the protective member is provided with a tip portion, and the tip portion of the protective member is housed in the fitting groove. Pointing device. The pointing device according to claim 6, wherein the tip portion includes a skeleton portion, a neck portion, and a head portion that are sequentially connected, and the outer diameter of the neck portion is smaller than the outer diameter of the skeleton portion and the head portion. .. The pointing device according to claim 2 , wherein the first elastic member is located on one side of the shaft portion away from the opening.

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