Pen-type electronic apparatus

Abstract

A pen-type electronic apparatus (1) comprising: a tubular housing (30) that has a grip section (101) which is gripped by a user; a pen shaft (10) that is housed in the interior of the housing (30); a sheet-shaped pressing sensor (20) that is wound in a location on an outside surface of the pen shaft (10) or an inside surface of the housing (30), said location overlapping with the grip section (101); and a cushioning material (50) that is positioned between the pen shaft (10) and the pressing sensor (20), or between the pressing sensor (20) and the housing (30), wherein the pressing sensor (20) has a low-sensitivity region at a center portion (102) of the grip section (101) along the lengthwise direction of the pen shaft (10).

Description

pen-shaped electronic device

[0001] The present invention relates to a pen-type electronic device having a grip portion that is held by a user.

[0002] Patent Document 1 discloses a holding state detection device (pen-type electronic device) that includes a housing shaped to be held by an operator, a piezoelectric sensor attached to the housing, and a detection unit that detects the holding state of the housing using the amount of fluctuation in the output voltage of the piezoelectric sensor.

[0003] WO 2016 / 38951

[0004] When a pen-type electronic device is held, the sensitivity is likely to change depending on where it is held, which is a problem that variations are likely to occur.

[0005] An object of the present invention is to provide a pen-type electronic device that prevents variations in sensitivity depending on the location where it is held.

[0006] The pen-type electronic device of this invention comprises a cylindrical housing having a gripping portion to be held by a user, a pen shaft stored inside the housing, a sheet-like pressure sensor wrapped around the outer surface of the pen shaft or the inner surface of the housing at a position overlapping the gripping portion, and cushioning material placed between the pen shaft and the pressure sensor, or between the pressure sensor and the housing, and is characterized in that the pressure sensor has a low-sensitivity region in the central part of the gripping portion along the longitudinal axis direction of the pen shaft.

[0007] The inventors of the present invention discovered that the sensitivity of the central portion of the grip along the longitudinal axis of the pen barrel is high, while the sensitivity of other portions is low. Therefore, by providing a low-sensitivity region in the central portion of the grip along the longitudinal axis of the pen barrel, the pen-type electronic device of the present invention can prevent variations in sensitivity depending on where it is gripped.

[0008] According to this invention, it is possible to prevent variations in sensitivity depending on the location where the device is held.

[0009] 1 is an exploded perspective view of the pen-type electronic device 1. FIG. 2 is a partially transparent side view of the pen-type electronic device 1. FIG. 3 is a cross-sectional view of the pen-type electronic device 1. FIG. 4 is a partial cross-sectional view taken along line A-A in FIG. 3. FIG. 5 is a cross-sectional view showing the structure of the pressure sensor 20. FIG. 6 is a diagram showing, as a reference example, a difference in output voltage of the pressure sensor depending on the location where it is held in a conventional configuration. FIG. 7 is a diagram showing a cross-section of a part of the grip portion 101 of the pen-type electronic device 1. FIG. 8 is a diagram showing a difference in output voltage of the pressure sensor depending on the location where it is held in the pen-type electronic device 1 of the present embodiment. FIG. 9 is a diagram showing a cross-section of a part of the grip portion 101 of the pen-type electronic device 1 according to Modification 2. FIG. 10 is a diagram showing a cross-section of a part of the grip portion 101 of the pen-type electronic device 1 according to Modification 4. FIG. 11 is a diagram showing a cross-section of a part of the pressure sensor 20 of the pen-type electronic device 1 according to Modification 6. FIG. 11 is a diagram showing a cross-section of a part of the grip portion 101 of the pen-type electronic device 1 according to Modification 7. FIG. 12 is a diagram showing a cross-section of a part of the grip portion 101 of the pen-type electronic device 1. FIG. 13 is a diagram showing a cross-section of a part of the pressure sensor 20 of the pen-type electronic device 1 according to Modification 8. 13 is a diagram showing a cross section of a part of a pressure sensor 20 in the pen-type electronic device 1 according to a ninth modified example. FIG.

[0010] Fig. 1 is an exploded perspective view of the pen-type electronic device 1. Fig. 2 is a partially see-through side view of the pen-type electronic device 1. Fig. 3 is a cross-sectional view of the pen-type electronic device 1, and Fig. 4 is a partially exploded cross-sectional view taken along line AA shown in Fig. 3.

[0011] The pen-type electronic device 1 includes a pen holder 10, a pressure sensor 20, and a housing 30. The pen holder 10 and the housing 30 are each cylindrical. The housing 30 has a hollow interior so that the pen holder 10 can be inserted. The pen holder 10 may be hollow to accommodate circuit components or the like, or may be filled in. The pen holder 10 and the housing 30 are each made of resin or metal with a Young's modulus of 1 GPa or more.

[0012] The pen holder 10 has a tapered pen tip at one end in the longitudinal direction (the direction perpendicular to the circumferential direction). The outer diameter of the pen holder 10 is smaller than the inner diameter of the housing 30. The pen holder 10 is housed inside the housing 30.

[0013] The user holds the grip portion 101 of the housing 30, which is close to the pen tip. The user holds the grip portion 101 and brings the pen tip into contact with another electronic device (for example, a tablet computer). When the user moves the pen tip, the other electronic device senses this movement and accepts the user's operation input.

[0014] The pressure sensor 20 is a flexible, sheet-like member having an elongated shape. The pressure sensor 20 is spirally wound along the outer surface of the pen body 10 in a portion corresponding to the grip portion 101. However, it is not essential for the present invention that the pressure sensor 20 be spirally wound. For example, the pressure sensor 20 may be wound around the entire portion of the outer surface of the pen body 10 that corresponds to the grip portion 101.

[0015] In addition, pressure sensors are generally often placed over the entire required pressure detection area. However, placing them over the entire area often results in a large pressure sensor area, which is a disadvantage in terms of cost. In contrast, the sheet-like pressure sensor 20 shown in this embodiment has an elongated shape and is wound spirally around the pen holder 10, which allows the area of ​​the pressure sensor 20 to be reduced relative to the area of ​​the desired pressure detection area. Therefore, it is desirable to place the pressure sensor 20 in such a spiral shape.

[0016] 3 and 4, the pressure sensor 20 is connected to the outer surface of the pen body 10 via a bonding member 70. That is, the bonding member 70 is disposed between the pen body 10 and the pressure sensor 20. In this embodiment, the bonding member 70 is double-sided tape. The bonding member 70 is made of an acrylic adhesive or glue having a Young's modulus of 100 kPa or more. The bonding member 70 may have the same area as the pressure sensor 20, or may have an area that covers the entire portion of the outer surface of the pen body 10 that corresponds to the grip portion 101.

[0017] 3 and 4, a cushioning material 50 is disposed between the pressure sensor 20 and the housing 30. The cushioning material 50 is made of a shrinkable resin with a Young's modulus of 100 kPa or more and 1 GPa or less. The cushioning material 50 may have the same area as the pressure sensor 20, or may have an area that covers the entire portion of the outer surface of the pen holder 10 that corresponds to the grip portion 101. The cushioning material 50 may also have an area that covers the entire outer surface of the pen holder 10.

[0018] As described above, the outer diameter of the pen holder 10 is smaller than the inner diameter of the housing 30. Therefore, the pen holder 10 is configured to be able to be stored inside the housing 30. However, due to manufacturing errors, the pen holder 10 may be larger or smaller than the target outer diameter. Similarly, due to manufacturing errors, the housing 30 may be larger or smaller than the target inner diameter.

[0019] If the outer diameter of the pen holder 10 is larger than the target and the inner diameter of the housing 30 is smaller than the target, the pen holder 10 may not be able to be stored inside the housing 30. Therefore, the outer diameter of the pen holder 10 is designed to be smaller than the target outer diameter by a predetermined value, and the outer diameter of the housing 30 is designed to be larger than the target inner diameter by a predetermined value. This makes it possible to configure the pen holder 10 to be stored inside the housing 30 even if manufacturing errors occur.

[0020] On the other hand, a space of a predetermined height is created between the pen holder 10 and the housing 30. However, in this embodiment, a cushion material 50 is provided between the pressure sensor 20 and the housing 30. The cushion material 50 is contractible. If the thickness of the cushion material 50 is greater than the predetermined height, the cushion material 50 can contract when the pen holder 10 is stored inside the housing 30, thereby eliminating the space. As a result, when a user grips the housing 30, deformation of the housing 30 due to gripping is transmitted to the pressure sensor 20 via the cushion material 50.

[0021] 5 is a cross-sectional view showing the structure of the pressure sensor 20. The pressure sensor 20 has a first electrode 201, a piezoelectric film 202, an adhesive member 203, a second electrode 204, an FPC 205, a third electrode 206, and a cover 207.

[0022] The first electrode 201 is disposed on a first main surface of the piezoelectric film 202. The first electrode 201 is an adhesive and conductive tape member. The first electrode 201 is grounded and functions as a shield electrode.

[0023] The piezoelectric film 202 is a piezoelectric material that generates polarization on opposing first (top) and second (bottom) principal surfaces due to expansion and contraction. For example, the piezoelectric film may be made of uniaxially stretched polylactic acid (PLA) or PVDF. Polylactic acid is either L-type polylactic acid (PLLA) or D-type polylactic acid (PDLA). Because polylactic acid generates piezoelectricity through molecular orientation processing, such as stretching, it does not require poling, as is the case with other polymers such as PVDF or piezoelectric ceramics. Furthermore, polylactic acid does not exhibit pyroelectric properties. Therefore, polylactic acid does not generate polarization due to the user's body temperature, making it suitable for pen-shaped electronic devices such as this embodiment.

[0024] The FPC 205 is a flexible insulating substrate made of polyimide, PET, liquid crystal polymer, or the like. The second electrode 204 is formed on the upper surface (piezoelectric film 202 side) of the FPC 205. The third electrode 206 is formed on the lower surface of the FPC 205.

[0025] The second electrode 204 is attached to the piezoelectric film 202 via an adhesive member 203. The second electrode 204 functions as a signal electrode for detecting a voltage generated on the second main surface of the piezoelectric film 202. The third electrode 206 is grounded and functions as a shield electrode. Note that it is not necessary for electrodes to be formed on both the first and second main surfaces of the FPC 205. An electrode may be formed on either the first or second main surface of the FPC 205. In this case, the shield electrode may be omitted.

[0026] The cover 207 has adhesiveness and is attached to the third electrode 206 to protect the third electrode 206. However, the cover 207 is not an essential component.

[0027] The first electrode 201 is attached to the pen body 10 via a bonding member 70. However, the cover 207 may also be attached to the pen body 10 via the bonding member 70. Alternatively, the pressure sensor 20 may be attached to the inner surface of the housing 30. In this case, the bonding member 70 is disposed between the pressure sensor 20 and the housing 30. Also, in this case, the cushioning material 50 is disposed between the pressure sensor 20 and the pen body 10.

[0028] A detection circuit (not shown) measures the potential difference (voltage) between the first electrode 201 and the second electrode 204. When the detection circuit detects a voltage exceeding a predetermined threshold, it determines that the grip portion 101 is being gripped by the user.

[0029] When a user grips the grip portion 101, the housing 30 is first deformed. When the housing 30 deforms, the cushion material 50 also deforms. When the cushion material 50 deforms, the pressure sensor 20 also deforms in accordance with the deformation of the cushion material 50. When the pen holder 10 does not deform, the lower surface side of the interior of the pressure sensor 20 does not deform, but the upper surface side deforms.

[0030] In this case, the adhesive tape 70 has the effect of fixing one side of the pressure sensor 20 to the pen holder 10. Fixing one side of the pressure sensor 20 to the pen holder 10 can prevent the pressure sensor 20 from shifting or undergoing unintended deformation, thereby preventing unexpected sensor output. When pressure is applied to the sensor 20, deformation occurs in the second electrode 204, FPC 205, and third electrode 206 in the expansion or contraction direction. This causes strain in the adhesive member 203 in the same direction, which is transmitted to the piezoelectric film 202. As a result, strain occurs in the expansion or contraction direction in the piezoelectric film 202, generating an electric field in the thickness direction of the piezoelectric film 202 according to the characteristics of the piezoelectric material, resulting in sensor output.

[0031] Furthermore, when the pen holder 10 deforms together with the pressure sensor 20, each layer of the pressure sensor 20 deforms. This causes bending deformation in the second electrode 204, the FPC 205, and the third electrode 206. This causes the second electrode 204 and the third electrode 206 to deform in either an elongation or contraction direction. This causes strain in the adhesive member 203 in the same direction, which is transmitted to the piezoelectric film 202. As a result, strain in either an elongation or contraction direction occurs in the piezoelectric film 202, generating an electric field in the thickness direction of the piezoelectric film 202 according to the characteristics of the piezoelectric material, which becomes the output of the sensor.

[0032] Therefore, the output of the sensor can be changed by changing the configuration of the housing and the interior of the housing.

[0033] When a user holds the grip of a pen-shaped electronic device, it is assumed that the user will hold the center of the pressure detection area or the edge of the detection area. When holding the center of the pressure detection area, the sensor area to which pressure is applied is wide, whereas when holding the edge, the sensor area to which pressure is applied is narrower than when pressure is applied to the center. As a result, when holding the edge, the sensor output is smaller than when holding the center. This creates a problem in that the sensor output is likely to vary within the pressure detection area.

[0034] 6 is a graph showing, as a reference example, the difference in output voltage of a pressure sensor depending on the grip position in a conventional configuration. The horizontal axis of the graph in the figure corresponds to the grip position of the pen-type electronic device, and the vertical axis represents voltage.

[0035] 6, when a user grips the grip of the pen-type electronic device, grip position A3 in the center of the pressure sensor arrangement portion shows a very high voltage, grip positions A2 and A4 off the center show low voltage, and grip position A1 closest to the pen tip and grip position A5 farthest from the pen tip show very low voltage.

[0036] A detection circuit (not shown) determines that the pen-type electronic device has been held by a user when it detects a voltage exceeding a predetermined threshold. If the threshold is set to correspond to the voltage when the pen-type electronic device is held at the center position A3, the detection circuit cannot determine that the pen-type electronic device has been held at other positions. On the other hand, if the threshold is set to correspond to the voltage when the pen-type electronic device is held at position A1 or A5, the detection circuit may mistakenly determine that a voltage due to noise or the like indicates that the pen-type electronic device has been held.

[0037] Therefore, the pen-type electronic device 1 of this embodiment has a low sensitivity region where the sensitivity of the pressure sensor is reduced in the central portion 102. Fig. 7 is a cross-sectional view of a part of the grip portion 101 of the pen-type electronic device 1.

[0038] 7 , the cushion material 50 has a notch 51 in the central portion 102. As described above, when a user grips the grip portion 101, the housing 30 is first deformed. When the housing 30 deforms, the cushion material 50 also deforms. When the cushion material 50 deforms, the pressure sensor 20 also deforms in accordance with the deformation of the cushion material 50.

[0039] 7, when the cushion material 50 has the notch 51 in the central portion 102, the amount of deformation of the pressure sensor 20 decreases in the central portion 102. As a result, the pressure sensor 20 forms a low sensitivity region in the central portion 102.

[0040] It should be noted that the notch 51 may be provided in the central portion 102 of the pressure sensor 20 instead of the cushion material 50. Alternatively, another cushion material that is relatively softer than the cushion material 50 may be provided at the position of the notch 51. Alternatively, as shown in Fig. 13, a thin portion 90 may be provided in the central portion 102 of the housing 30. In these cases, the pressure sensor 20 also has a low sensitivity region in the central portion 102.

[0041] 8 is a diagram showing the difference in output voltage of the pressure sensor depending on the location where the pen-type electronic device 1 of this embodiment is held. The horizontal axis of the graph in the figure corresponds to the holding position of the pen-type electronic device, and the vertical axis represents voltage.

[0042] 8, in the pen-type electronic device 1 of this embodiment, there is no significant difference in voltage regardless of which of the gripping positions A1 to A5 the user grips. Therefore, the detection circuit (not shown) can properly detect the user's grip without erroneously determining that the user grips any of the gripping positions 101.

[0043] In the above embodiment, an example was shown in which the low sensitivity region of the pressure sensor 20 is formed by the cushion material 50 having the notch 51 in the portion corresponding to the central portion 102. However, the low sensitivity region can also be formed by various modified examples as described below.

[0044] (Modification 1) The low sensitivity region may be configured by having a thin portion in the cushion material 50 at a portion corresponding to the low sensitivity region of the pressure sensor 20. In this case as well, the deformation amount of the pressure sensor 20 is reduced at the central portion 102.

[0045] 9 is a cross-sectional view of a portion of the grip portion 101 of the pen-type electronic device 1 according to Modification 2. As shown in Fig. 9, the low sensitivity region may be configured by having a notch in the joint member 70 at a portion corresponding to the low sensitivity region of the pressure sensor 20. In this case as well, the amount of deformation of the pressure sensor 20 is reduced in the central portion 102.

[0046] (Modification 3) The low sensitivity region may be configured by having a thin portion in the joint member 70 at a portion corresponding to the low sensitivity region of the pressure sensor 20. In this case as well, the deformation amount of the pressure sensor 20 is reduced in the central portion 102.

[0047] 10 is a diagram showing a cross section of a portion of the grip portion 101 of the pen-type electronic device 1 according to Modification 4. As shown in FIG. 10 , the pen-type electronic device 1 according to Modification 4 includes a spacer 91 between the cushion material 50 and the housing 30. The spacer 91 has a notch in a portion (central portion 102) corresponding to the low sensitivity region of the pressure sensor 20. Alternatively, instead of using the spacer 91, the thickness of the cushion material 50 may be made thinner only in the central portion 102 (or made thicker in portions other than the central portion 102). This forms a low sensitivity region in the central portion 102 of the pressure sensor 20. In this case as well, the amount of deformation of the pressure sensor 20 is reduced in the central portion 102.

[0048] (Variation 5) The spacer 91 may have a thin portion in a portion (central portion 102) corresponding to the low sensitivity region of the pressure sensor 20. This forms a low sensitivity region in the central portion 102 of the pressure sensor 20. In this case as well, the amount of deformation of the pressure sensor 20 is reduced in the central portion 102.

[0049] 11 is a cross-sectional view of a portion of the pressure sensor 20 in the pen-shaped electronic device 1 according to Modification 6. As shown in Fig. 11, the second electrode 204 of the pressure sensor 20 has a notch in the central portion 102. This forms a low-sensitivity region in the central portion 102 of the pressure sensor 20. In this case as well, the amount of deformation of the pressure sensor 20 is reduced in the central portion 102.

[0050] It is also possible for the piezoelectric film 202 of the pressure sensor 20 to have a notch in the central portion 102. In this case, a low sensitivity region is formed in the central portion 102 of the pressure sensor 20. In this case, the amount of deformation of the pressure sensor 20 is also reduced in the central portion 102. Furthermore, the low sensitivity region may be formed by, for example, making the width of the central portion in the longitudinal direction of the piezoelectric film larger than the width of the end portions.

[0051] 12 is a cross-sectional view of a portion of the grip portion 101 of the pen-type electronic device 1 according to Modification 7. As shown in Fig. 12, the pen holder 10 has a thin portion in the central portion 102. This forms a low sensitivity region in the central portion 102 of the pressure sensor 20. In this case as well, the amount of deformation of the pressure sensor 20 is reduced in the central portion 102.

[0052] (Variation 8) FIG. 14 is a cross-sectional view of a portion of the pressure sensor 20 in the pen-type electronic device 1 according to Variation 8. In the above embodiment, the pressure sensor 20 was spirally wound at a uniform pitch along the outer surface of the pen body 10 in the portion corresponding to the grip portion 101. The pressure sensor 20 in Variation 8 is wound so that the pitch is short at the center portion 102 and long at positions other than the center portion 102. As a result, fewer pressure sensors 20 are arranged in the center portion 102 and more are arranged in positions other than the center portion 102. In this case, the deformation amount of the pressure sensor 20 is also reduced in the center portion 102. (Variation 9) FIG. 15 is a cross-sectional view of a portion of the pressure sensor 20 in the pen-type electronic device 1 according to Variation 9. In the pen-type electronic device 1 according to Variation 9, the pressure sensor 20 is divided into a first pressure sensor 20A arranged in the center portion 102 and a second pressure sensor 20B arranged in a position other than the center portion 102. A detection circuit (not shown) measures the voltages of the first pressure sensor 20A and the second pressure sensor 20B. Furthermore, the detection circuit determines that the user has grasped the grip portion 101 when the voltage of the first pressure sensor 20A exceeds a first threshold value or when the voltage of the second pressure sensor 20B exceeds a second threshold value. Here, the first threshold value is set to a value higher than the second threshold value. In this case, a low-sensitivity region where the sensitivity of the pressure sensor is reduced is formed in the central portion 102.

[0053] Furthermore, the piezoelectric films used in the first pressure sensor 20A and the second pressure sensor 20B may be polylactic acid films uniaxially stretched in different directions. For example, if the uniaxial stretching direction of the piezoelectric film of the first pressure sensor 20A is 20° relative to the axial direction of the pen shaft 10 and the uniaxial stretching direction of the second pressure sensor 20B is 45° relative to the axial direction of the pen shaft 10, the output of the first pressure sensor 20A will be lower for the same pressure. In other words, the uniaxial stretching direction of the piezoelectric film of the second pressure sensor 20B relative to the axial direction of the pen shaft 10 is closer to 45° (or 135°) than the uniaxial stretching direction of the piezoelectric film of the first pressure sensor 20A relative to the axial direction of the pen shaft 10. In this case, a low-sensitivity region where the sensitivity of the pressure sensor is reduced is formed in the central portion 102.

[0054] When two types of sensors are used as described above, the sensor wrapped around the center and the sensor wrapped around the area other than the center do not need to be integrated.

[0055] The above-described embodiment and various modifications are merely examples, and can be combined as appropriate. For example, a sensor having the same uniaxial extension direction may be divided into two and wound around the sensor.

[0056] The description of the present embodiment is illustrative in all respects and is not restrictive. The scope of the present invention is defined not by the above-described embodiments but by the claims. Furthermore, the scope of the present invention is intended to include all modifications that are equivalent to the claims and fall within the scope thereof.

[0057] The technical concept of this embodiment can be summarized as follows.

[0058] (1) A pen-shaped electronic device comprising: a cylindrical housing having a grip portion to be held by a user; a pen shaft stored inside the housing; a sheet-like pressure sensor wrapped around the outer surface of the pen shaft or the inner surface of the housing at a position overlapping the grip portion; and a cushioning material placed between the pen shaft and the pressure sensor, or between the pressure sensor and the housing, wherein the pressure sensor has a low sensitivity area in the central portion of the grip portion along the longitudinal axis direction of the pen shaft.

[0059] (2) The pen-type electronic device according to (1), wherein the cushioning material has a thin portion or a notch in a portion corresponding to the low sensitivity area, thereby forming the low sensitivity area.

[0060] (3) A pen-type electronic device according to (1) or (2) above, comprising a joining member disposed between the pen body and the pressure sensor, or between the pressure sensor and the housing, wherein the joining member has a thin portion or a notch in a portion corresponding to the low sensitivity area, thereby forming the low sensitivity area.

[0061] (4) The pen-shaped electronic device according to any one of (1) to (3), wherein the pressure sensor has a piezoelectric film, a first electrode arranged on a first main surface of the piezoelectric film, and a second electrode arranged on a second main surface of the piezoelectric film, and the first electrode or the second electrode has a notch in a portion corresponding to the low sensitivity region, thereby forming the low sensitivity region.

[0062] (5) The pen-type electronic device according to any one of (1) to (4) above, wherein the pen body has a thin portion at a portion corresponding to the low sensitivity area, thereby forming the low sensitivity area.

[0063] (6) A pen-type electronic device according to any one of (1) to (5) above, comprising a spacer arranged between the pen body and the pressure sensor, or between the pressure sensor and the housing, wherein the spacer has a thin portion or a notch in a portion corresponding to the low sensitivity area, thereby forming the low sensitivity area.

[0064] (7) The pen-shaped electronic device described in any one of (1) to (6) above, wherein the pressure sensor has a piezoelectric film, a first electrode arranged on a first main surface of the piezoelectric film, and a second electrode arranged on a second main surface of the piezoelectric film, and the low sensitivity area is formed by the piezoelectric film having a cutout portion in a portion corresponding to the low sensitivity area.

[0065] (8) The pen-type electronic device according to any one of (1) to (7), wherein the pressure sensor has an elongated shape and is spirally wound around the pen shaft.

[0066] 1: Pen-type electronic device 10: Pen body 20: Pressure sensor 30: Housing 50: Cushioning material 51: Notch 70: Joint member 91: Spacer 101: Grip 102: Center portion 201: First electrode 202: Piezoelectric film 203: Adhesive member 204: Second electrode 205: FPC 206: Third electrode 207: Cover

Claims

1. A cylindrical housing having a grip portion to be gripped by a user; a pen holder housed inside the housing; a sheet-like pressure sensor wrapped around an outer surface of the pen body or an inner surface of the case at a position overlapping the grip portion; a cushioning material disposed between the pen shaft and the pressure sensor, or between the pressure sensor and the housing; Equipped with The pressure sensor is a pen-type electronic device having a low sensitivity area in a central portion of the grip portion along the longitudinal axis of the pen shaft.

2. The cushioning material has a thin portion or a notch in a portion corresponding to the low sensitivity area, thereby forming the low sensitivity area. The pen-type electronic device according to claim 1 .

3. a joint member disposed between the pen shaft and the pressure sensor, or between the pressure sensor and the housing; The joining member has a thin portion or a notch in a portion corresponding to the low sensitivity region, thereby forming the low sensitivity region. The pen-type electronic device according to claim 1 or 2.

4. The pressure sensor is A piezoelectric film; a first electrode disposed on a first main surface of the piezoelectric film; a second electrode disposed on a second main surface of the piezoelectric film; having The first electrode or the second electrode has a notch in a portion corresponding to the low sensitivity region, thereby forming the low sensitivity region. The pen-type electronic device according to claim 1 or 2.

5. The pen shaft has a thin portion at a portion corresponding to the low sensitivity region, thereby forming the low sensitivity region. The pen-type electronic device according to claim 1 or 2.

6. a spacer disposed between the pen base and the pressure sensor, or between the pressure sensor and the housing; The spacer has a thin portion or a notch in a portion corresponding to the low sensitivity region, thereby forming the low sensitivity region. The pen-type electronic device according to claim 1 or 2.

7. The pressure sensor is A piezoelectric film; a first electrode disposed on a first main surface of the piezoelectric film; a second electrode disposed on a second main surface of the piezoelectric film; having The piezoelectric film has a notch in a portion corresponding to the low sensitivity area, thereby forming the low sensitivity area. The pen-type electronic device according to claim 1 or 2.

8. The pressure sensor has an elongated shape and is spirally wound around the pen shaft. The pen-type electronic device according to claim 1 or 2.