TWI690827B - Touch pen with guided pressure-sensitive structure - Google Patents

Abstract

The invention provides a stylus with a guided pressure-sensitive structure, which includes a pen tip disposed in a pen end opening of a pen case, one end of the pen tip is disposed in a slot at one end of a guide, and the other end of the guide There is a convex portion; a pressure sensing module is formed with a force concave portion on the side corresponding to the convex portion, when the user uses the stylus, the pen tip member receives an input force, and the input force passes through the guide member The convex portion exerts force on the force receiving concave portion of the pressure sensing module, and the guide only transmits the component force parallel to the central axis of the stylus to the pressure sensing module, thereby making the pressure sensing module The force of the group is average, which improves the accuracy of sensing.

Description

Touch pen with guided pressure-sensitive structure

A stylus, especially a stylus with a guided pressure-sensitive structure.

In order to enable more and more diverse applications of the touch device and provide better operability, the existing touch device provides pressure sensing and performs a corresponding sensing change function. Generally speaking, a stylus includes a pressure sensing element and a pen tip, the pressure sensing element and the pen tip are disposed in a pen case of the stylus, and a first end of the pen tip is exposed In the pen case of the stylus, a second end of the pen tip is connected to the pressure sensing element. When the user touches a flat surface with the tip of the stylus and presses down, the stylus receives a pressure sensing element from the tip of the stylus toward the stylus Pass the effort. When the pen tip of the stylus receives the input force, the input force is transmitted to the pressure sensing element, so that the pressure sensing element is compressed, and the pressure sensing element detects the magnitude of the input force, generating a correspondence The pressure sensing signal is sent to a processing unit. The processing unit further generates a control signal according to the pressure sensing signal and sends it to the touch device, so that the touch device performs the pressure sensing function according to the control signal. .

Further, in order to achieve the purpose of pressure transmission, the tip of the stylus is relatively movable in the pen case relative to the pen case of the stylus, allowing the user to hold the pen case of the stylus When the stylus is used, the pen tip can move relatively, thereby allowing the pressure sensing element to sense the pressure that the pen tip bears when the user uses the stylus.

However, in general, when the user uses the stylus, the manner in which the user holds the stylus makes the stylus and the contact plane not perpendicular. In other words, the pen tip is subject to the entry The direction of the force is not parallel to the central axis of the stylus. As a result, the pen tip piece will be skewed to the central axis of the stylus pen due to the influence of the input force, which may result in uneven force on the pressure sensing element and inaccurate sensing. Therefore, the prior art touch gestures with pressure sensing function must be further improved.

In view of the shortcomings of the existing pressure-sensing stylus when the tip of the pen is not parallel to the central axis of the stylus, the pressure-sensing element is not equally stressed, resulting in insufficient pressure sensing accuracy. The present invention provides A stylus with a guided pressure-sensing structure includes: a pen case, forming an internal space, and having a pen end opening, and an abutment portion formed in the pen case; a pen tip, disposed in the internal space of the pen case There is a first end and a second end, the first end penetrates through the opening of the pen end; a guide is provided in the inner space of the pen case, and has a first surface and a second surface opposite , Wherein the first surface is open toward the pen end, and includes: a slot formed inwardly on the first surface of the guide member, wherein the second end of the pen tip member is disposed in the slot; a convex portion, It is a convex curved surface protruding from the second surface of the guide; a pressure sensing module is provided on one side of the second surface of the guide, the pressure sensing module has a force receiving recess, the The force concave portion is an inner concave curved surface; a processing module is arranged in the inner space of the pen case and is electrically connected to the pressure sensing module; wherein, the convex portion of the guide member abuts against the pressure sensing module The concave part of the force.

The combination of the pen tip member and the guide member forms a pressure transmitting assembly, the first end of the pen tip member penetrates the pen end opening, and the second end is disposed in the slot of the guide member, so when the pen tip When the member receives an input force from the first end, the second end of the pen tip member abuts against the slot of the guide member and applies a force to the guide member, and the convex portion of the guide member abuts against the pressure sensing module The concave part of the force, and apply force to the concave part of the force. Further, when the pen tip member is skewed to the central axis of the stylus by the input force, since the guide member can only be displaced along the parallel direction of the central axis of the stylus pen, the guide member will only apply the input force The component force parallel to the central axis of the stylus pen is transmitted to the pressure sensing module. In this way, the pressure sensing module can be stressed on average, thereby improving the accuracy of sensing.

In addition, since the convex portion of the guide member is an outer convex curved surface, and the force concave portion is an inner concave curved surface, when the pen tip member receives the input force and deflects from the central axis of the stylus, the convex portion of the guide member The portion can smoothly slide relative to the force-receiving concave portion, and maintain a stable force application to the force-receiving concave portion of the pressure sensing module.

10: stylus

11: Pen case

110: interior space

111: pen end opening

12: nib

121: The first end

122: second end

123: Insulation

13: Guide

131: slot

132: convex part

133: Ring rib

14: Pressure sensing module

140: Forced recess

141: Connection block

142: Pressure sensing element

143: First fixing

1431: First bottom wall

1432: The first ring wall

1430: opening

144: the first elastic piece

1441: bottom plate

1442: Rubber washer

145: circuit board

146: flexible circuit board

15: Processing module

16: Second fixing

160: Pen tip socket

161: Second bottom wall

162: Second ring wall

1621: bump

17: Second elastic piece

20: Touch device

FIG. 1 is a partial cross-sectional schematic diagram of a stylus with a guided pressure-sensitive structure of the present invention.

FIG. 2 is a schematic diagram of the use of the stylus with a guided pressure-sensitive structure of the present invention.

FIG. 3 is a partial cross-sectional schematic view of the use state of the guiding pressure-sensing structure of the present invention.

FIG. 4 is an isolated perspective view of some elements in a stylus with a guided pressure-sensitive structure of the present invention.

FIG. 5 is another schematic perspective view of some elements in the stylus with a guided pressure-sensitive structure of the present invention.

6 is a schematic perspective view of some elements in a second preferred embodiment of a stylus with a guided pressure-sensitive structure according to the present invention.

Please refer to FIG. 1, the present invention provides a stylus 10 with a guided pressure-sensitive structure, including a pen case 11, a pen tip 12, a guide 13, a pressure sensing module 14, and a processing module 15. The pen case 11 forms an internal space 110, and a pen-end opening 111 is formed at one end in a longitudinal direction X, and the processing module 15, the guide member 13, the pen tip member 12, and the pressure sensing module 14 All are set in the internal space 110. Wherein, the pen tip member 12 has a first end 121 and a second end 122 at two opposite ends in the longitudinal direction X, and the first end 121 passes through the pen end opening 111. The guide 13 has a first surface and a second surface opposite to each other, wherein the first surface faces the pen end opening 111, and the guide 13 includes a slot 131 and a convex portion 132, wherein the slot 131 A recess is formed on the first surface and faces the pen end opening 111, the second end 122 of the pen tip member 12 is disposed in the slot 131, and the convex portion 132 is a protrusion from the second surface of the guide member 13 The convex surface is formed. The pressure sensing module 14 is electrically connected to the processing module 15 and is disposed on one side of the second surface of the guide 13. The pressure sensing module 14 has a force-receiving concave portion 140, which is a concave curved surface and corresponds to the convex portion 132 of the guide 13. The convex portion 132 of the guide 13 abuts a center point of the force concave portion 140, and the pressure sensing module 14 generates a pressure sensing signal according to an applied force received by the force concave portion 140 and transmits it to the Processing module 15.

Please refer to FIG. 2 and FIG. 3, the combination of the nib member 12 and the guide member 13 forms a pressure transmitting assembly, the first end 121 of the nib member 12 is disposed in the pen end opening 111, and the second end 122 It is disposed in the slot 131 of the guide 13, so when the pen tip 12 receives a force from the first end 121, the second end 122 of the pen tip 12 abuts the slot 131 of the guide 13 and When the guiding member 13 is urged, the convex portion 132 of the guiding member 13 abuts against the center point of the force receiving recess 140 of the pressure sensing module 14 and urges the force receiving recess 140. When the convex portion 132 of the guide 13 applies force to the force receiving concave portion 140, the force application direction will maintain the normal direction of the tangent plane of the contact point, and it is not easy to generate a component force perpendicular to the normal direction, so the nib 12 The input force received by the first end 121 can be transmitted to the pressure sensing module 14 in a complete and balanced manner.

Further, when the first end 121 of the nib 12 receives an input force that is not parallel to the longitudinal direction X, for example, the stylus 10 is in non-perpendicular contact with a touch device 20, the nib 12 The pen end opening 111 of the pen case 11 is a fulcrum, so that when the second end 122 generates a lateral displacement deviating from the longitudinal direction X, the guide member 13 receives the lateral force of the second end 122 of the pen point member 12 to cause the guide The member 13 is deflected relative to the force receiving recess 140. Since the convex portion 132 abuts against the concave curved surface of the force receiving concave portion 140 of the pressure sensing module 14, the convex portion 132 can slide stably in the force receiving concave portion 140 and maintain the pressure sensing module The force-applying concave portion 141 of 14 stably applies force.

In addition, when the pen tip 12 is skewed to the central axis of the stylus 10 by the force, the guide 13 can only be displaced along the parallel direction of the central axis of the stylus 10, that is, along the longitudinal direction X Therefore, the guide 13 only transmits the component of the input force parallel to the central axis of the stylus 10 to the pressure sensing module 14. In this way, the pressure sensing module 14 can be stressed on average, thereby improving the accuracy of sensing.

Please refer to FIG. 1, FIG. 4 and FIG. 5 together. In the first preferred embodiment of the present invention, the pressure sensing module 14 includes a connecting block 141, a pressure sensing element 142 and a first The fixing member 143, the connecting block 141 has a first surface and a second surface at opposite ends of the longitudinal direction X, wherein the first surface is directed toward the pen end opening 111, and the first surface is recessed to form the force receiving recess 140, and the force concave portion 140 is preferably formed in the middle of the first surface, and a curvature of the force concave portion 140 is smaller than a curvature of the convex portion 132 of the guide member 13. The first fixing member 143 is fixed to the pen case 11 and has a first bottom wall 1431. The first bottom wall 1431 is disposed on one side of the second surface of the connecting block. The pressure sensing element 142 is electrically connected to the processing module 15, is disposed between the second surface and the first bottom wall 1431 of the first fixing member 143, and is disposed in the middle of the second surface of the connection block . Since the first fixing member 143 is locked with the pen case 11, when the connecting block 141 is urged by the pen tip member 12 from the force receiving recess 140, the pressure sensing element 142 is formed by the second surface Applying force, the pressure sensing element 142 is urged by the second surface of the connecting block 141 and is compressed between the connecting block 141 and the first bottom wall 1431 of the first fixing member 143, thus sensing Under pressure and generate the pressure sensing signal.

In the preferred embodiment, since the pressure sensing element 142 is disposed at the middle position of the second surface of the connecting block 141, and the guide 13 is the center of the first surface of the connecting block 141 to the connecting block 141 exerts a force, that is to say, the connecting block 141 is less likely to be skewed with the central axis of the stylus 10 due to the force of the guide member 13 on the force receiving recess 140, maintaining its second surface and the sense of pressure The measuring element 142 is in stable contact, thus avoiding that the pressure sensing element 142 is not parallel to the longitudinal direction X due to the force direction of the pen tip 12, resulting in uneven sensing and error.

Preferably, the pressure sensing module 14 further includes a first elastic member 144 disposed between the pressure sensing element 142 and the first bottom wall 1431 of the first fixing member 143. The first elastic member 144 provides a buffering effect of the pressure sensing element 142. When the stylus 10 receives a large force from the first end 121 of the tip member 12, the pressure sensing element 142 is connected to the When an excessive pressure is applied between the block 141 and the first bottom wall 1431, the deformation of the first elastic member 144 generates a buffering effect to prevent the pressure sensing element 142 from being damaged due to the excessive pressure.

Please refer to FIG. 6 together. In a second preferred embodiment of the present invention, it further includes a second fixing member 16, the second fixing member 16 and the pen case 11 and the first fixing member 143 The second fixing member 16 has a second bottom wall 161, and the second bottom wall 161 is disposed on one side of the first surface of the guide member 13, which is located on the guide member 13 and Between the pen end openings of the pen case 11. The second bottom wall 161 forms a pen tip insertion hole 160 corresponding to the pen end opening 111 of the pen case 11, and the slot 131 of the guide 13 corresponds to the pen tip insertion hole 160 The pen end opening 111 is provided.

Please refer to FIG. 6 again. In this preferred embodiment, a second elastic member 17 is further included. The second elastic member 17 surrounds the slot 131 of the guide member 13 and has opposite ends along the longitudinal direction X. Further, the periphery of the second surface of the guide 13 extends radially to form a ring-shaped rib 133, and one end of the second elastic member 17 abuts against the ring-shaped rib 133 of the guide 13 and the other end By the second bottom wall 161 of the second fixing member 16.

The second elastic member 17 is preferably a compression spring element. The compression spring element is pressed tightly between the second bottom wall 161 of the second fixing member 16 and the ring-shaped rib 133 of the guide member 13. The fixing member 16 is fixed to the pen case 11, one end of the second elastic member 17 abuts the second bottom wall 161 and generates a tension along the length direction X, and the other end pushes against the ring-shaped protrusion of the guide member 13 The rib 133 pushes the guide 13 and the connecting block 141 and the pressure sensing element 142 of the pressure detection module against the first bottom wall 1431 of the first fixing member 143 to stabilize the guide 13 and the connecting block 141 and the pressure sensing element 142, and causes the pressure sensing element 142 to generate a stable initial pressure value.

Please refer to FIGS. 4 and 5 again. Further, the first elastic member 144 includes a bottom plate 1441 and a rubber washer 1442. The rubber washer 1442 is disposed on the first bottom wall 1431 near the first fixing member 143. The bottom plate 1441 is disposed between the rubber washer 1442 and the pressure sensing element 142. The pressure sensing element 142 abuts against the bottom plate 1441 and is forced between the second surface of the connecting block 141 and the bottom plate 144 by the tension of the second elastic member 17.

The rubber washer 1442 of the first elastic member 144 provides a cushioning resistance to the pressure sensing element 142. The bottom plate 1441 provides a stable abutment surface for the pressure sensing element 142. In addition, the rubber gasket 1442 has a hollow ring shape, and the pressure sensing element 142 abuts against the center of the bottom plate 1441, and the bottom plate 1441 is correspondingly disposed in the center hollow of the rubber gasket 1442, thereby providing a Good buffering capacity. More preferably, the rubber washer 1442 is an elastic body with a large elastic coefficient, and the elastic coefficient is selected according to an upper limit value of the pressure sensing element 142. That is to say, in normal use and when the pen tip 12 receives an input force from the first end 121 that is less than the upper limit of pressure sensitivity, the rubber washer system 1442 can be regarded as an approximate rigid body, so the pressure sensing element 142 is connected at the connection The pressure detected between the block 141 and the first elastic member 1441 is not affected by the deformation of the rubber washer 1442; when an input force received by the first end 121 of the nib member 12 is greater than the upper limit of the pressure sensitivity, the The rubber gasket 1442 undergoes a large deformation and has a buffering effect.

Referring again to FIG. 6, in a third preferred embodiment of the present invention, the first fixing member 143 includes a first ring wall 1432, and one end of the first ring wall 1432 is disposed around the first At the periphery of the bottom wall 1431, the other end is open toward the pen end opening 111, and the guide 13 and the pressure sensing element 142 are disposed in the first ring wall 1432. Further, the second fixing member 16 includes a second ring wall 162, one end of the second ring wall 162 is disposed around the periphery of the second bottom wall 161, and the other end is opened away from the pen end opening 111. The first ring wall 1432 of the first fixing member 143 is sleeved in the second ring wall 162 of the second fixing member 16 through the open end of the second ring wall 162 of the second fixing member 16. Preferably, the first ring wall 1432 of the first fixing member 143 has an opening 1430, and a protrusion 1621 is formed on the inner side of the second ring wall 162 of the second fixing member 16, and the protrusion 1621 snaps into the first In the opening 1430 of the first ring wall 143 of a fixing member 143, the first fixing member 143 is locked with the second fixing member 16.

Referring again to FIG. 1, in a fourth preferred embodiment of the present invention, the pressure sensing module 14 further includes a circuit board 145 and a flexible circuit board 146. The circuit board 145 is disposed in the first ring wall 1432 of the first fixing member 143, and is disposed between the pressure sensing element 142 and the second surface of the connecting block 141. The flexible circuit board 146 has two opposite ends, one of which is electrically connected to the circuit board 145, the other end extends out of the ring wall 1432 of the first fixing member 143 and is electrically connected to the processing module 15, and the pressure sensing element 142 The processing module 15 is electrically connected through the circuit board 145 and the flexible circuit board 146. In the preferred embodiment, the connecting block 141, the guide member 13 and the pen tip member 12 are made of conductive materials, respectively, and the pen case 11 is a metal pen case. After receiving the pressure sensing signal, the processing module 15 generates a touch signal and transmits it to the circuit board 145. The circuit board 145 sends the touch signal through the connecting block 141, the guide member 13, and the second elastic member 17 to the pen tip member 12, so as to achieve the touch signal sending function of an active stylus. Preferably, the pen tip member 12 is provided with an insulating layer 123 which covers the pen tip member 12 and the insulating layer 123 is disposed between the pen tip member 12 and the pen case 11 so that the pen tip member 12 and An insulation isolation is formed between the pen end openings 111 of the pen case 11 to avoid the processing module 15 The electrical short circuit between the nib 12 and the pen case 11 causes the touch signal to be sent directionally toward the longitudinal direction X through the first end 121 of the nib 12.

The above is only the preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed in the preferred embodiment as above, it is not intended to limit the present invention. Anyone who is familiar with this technology Personnel, within the scope of not departing from the technical solutions of the present invention, when the technical contents disclosed above can be used to make some changes or modifications to equivalent embodiments of equivalent changes, but any content that does not depart from the technical solutions of the present invention, according to the present invention Any simple modifications, equivalent changes, and modifications made to the above embodiments by the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

10: stylus

11: Pen case

110: interior space

111: pen end opening

12: nib

121: The first end

122: second end

123: Insulation

13: Guide

131: slot

132: convex part

133: Ring rib

140: Forced recess

141: Connection block

142: Pressure sensing element

143: First fixing

1430: opening

1431: First bottom wall

1432: The first ring wall

144: the first elastic piece

1441: bottom plate

1442: Rubber washer

145: circuit board

146: flexible circuit board

15: Processing module

160: Pen tip socket

161: Second bottom wall

162: Second ring wall

1621: bump

17: Second elastic piece

Claims (9)

A stylus with a guided pressure-sensing structure includes: a pen case, forming an internal space, and having a pen end opening, and an abutment portion formed in the pen case; a pen tip, disposed in the internal space of the pen case There is a first end and a second end, the first end penetrates through the opening of the pen end; a guide is provided in the inner space of the pen case, and has a first surface and a second surface opposite , Wherein the first surface is open toward the pen end, and includes: a slot formed inwardly on the first surface of the guide member, wherein the second end of the pen tip member is disposed in the slot; a convex portion, It is a convex curved surface protruding from the second surface of the guide; a pressure sensing module is provided on one side of the second surface of the guide, the pressure sensing module has a force receiving recess, the The force concave portion is an inner concave curved surface; a processing module is disposed in the inner space of the pen case and is electrically connected to the pressure sensing module; wherein, the convex portion of the guide member abuts against the pressure sensing module The force receiving recess; wherein the pressure sensing module includes: a connecting block having a first surface and a second surface opposite to each other, the first surface is open toward the pen end and recessed to form the force receiving recess, and the A curvature of the force concave portion is smaller than a curvature of the convex portion of the guide member; a first fixing member is clamped with the pen case, the first fixing member has a first bottom wall and the first bottom wall is provided On one side of the second surface of the connection block; a pressure sensing element, electrically connected to the processing module, and disposed between the second surface of the connection block and the first bottom wall, and disposed on the The middle position of the second surface of the connection block. The stylus with a guided pressure-sensing structure according to claim 1, wherein the pressure-sensing module further includes: a first elastic member disposed on the first bottom of the pressure-sensing element and the first fixing member Between the walls. The stylus with a guided pressure-sensitive structure according to claim 2, wherein: the first elastic member comprises: a bottom plate; and a rubber washer, the rubber washer abuts against the first bottom wall of the first fixing member, The bottom plate is disposed between the rubber gasket and the pressure sensing element. The stylus with a guided pressure-sensitive structure according to claim 1, further comprising: a second fixing member, which is locked with the pen case and the first fixing member, and the second fixing member has a second base And the second bottom wall is disposed on one side of the first surface of the guide; wherein: the second bottom wall of the second fixing member forms a pen point insertion hole, the pen point insertion hole corresponds to the pen case The pen end opening is disposed, and the slot of the guide member is disposed corresponding to the pen end opening via the pen tip member insertion hole. The stylus with a guided pressure-sensitive structure according to claim 4, further comprising: a second elastic member surrounding the slot of the guiding member and having opposite ends; wherein: the second of the guiding member The peripheral edge of the surface extends radially to form an annular convex rib. One end of the second elastic member abuts the annular convex rib of the guide member, and the other end abuts the second bottom wall of the second fixing member. The stylus with a guided pressure-sensitive structure according to claim 4, wherein: the first fixing member comprises a first ring wall, one end of the first ring wall is disposed around the periphery of the first bottom wall, and the other One end is open toward the pen end opening, and the guide member and the pressure sensing module are disposed in the first ring wall; the second fixing member includes a second ring wall, one end of the second ring wall and the surrounding The second end wall is disposed at the periphery of the second bottom wall, and the other end is open to the pen end opening; wherein: the first ring wall of the first fixing member is sleeved in the second ring wall of the second fixing member. The stylus with a guided pressure-sensitive structure according to claim 4, wherein: the first ring wall of the first fixing member has an opening; a convex block is formed on the inner side of the second ring wall of the second fixing member, The projection is snapped into the opening of the first fixing member. The stylus with a pressure-oriented structure as described in claim 4, the pressure-sensing module further comprises: a flexible circuit board having two opposite ends; and a circuit board, disposed on the first fixing member The first ring wall is disposed between the second surface of the connecting block and the pressure sensing element; wherein: one end of the flexible circuit board is disposed in the first ring wall of the first fixing member and is electrically connected The other end of the circuit board extends out of the first ring wall of the first fixing member and is electrically connected to the processing module; wherein: the guide member, the connecting block and the pen tip member are respectively made of a conductive material. The stylus with a guided pressure-sensitive structure according to claim 8, wherein: the pen case is a metal pen case; the pen tip member is provided with an insulating layer, the insulating layer is wrapped around the pen tip member, and the insulating layer It is arranged between the pen tip and the pen case.

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