JP2012057992A - Pressure sensitive sensor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pressure sensitive sensor capable of performing highly accurate measurement in a wide range as compared with a conventional one.SOLUTION: A long conductive part 12 includes: a pressure side electrode 12a formed on the surface of a film base material 11; a conductive layer 12b formed so as to coat the whole surface of the electrode 12a; and a conductive layer 12c laminated on the conductive layer 12. The conductive layer 12c is adjusted so as to contain conductive particles more than the conductive layer 12b. A long conductive part 22 includes: a pressure side electrode 22a formed on the surface of a film base material 21; a conductive layer 22b formed so as to coat the whole surface of the electrode 22a; and a conductive layer 22c laminated on the conductive layer 22b. The conductive layer 22c is adjusted so as to contain conductive particles more than the conductive layer 22b.

Description

  The present invention relates to a pressure-sensitive sensor that measures pressure.

  Conventionally, a pressure-sensitive sensor is known in which a plurality of row / column electrodes coated with a conductive layer intersect each other between two flexible film bases (for example, patents). Reference 1). In this type of pressure-sensitive sensor, when pressure is applied, conductive layers arranged in an intersecting manner come into contact with each other, and thereby the resistance value changes. And the magnitude | size of the applied pressure can be measured by detecting the change of this resistance value.

JP 2005-274549 A

  However, in the conventional pressure-sensitive sensor, the conductive layers gradually come into contact with each other when pressure is applied to the sensor. Then, the resistance value changes in a manner that follows the contact between the conductive layers. For this reason, there is a possibility that measurement errors related to output responsiveness, creep, and hysteresis are increased.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a pressure-sensitive sensor capable of performing measurements related to output responsiveness, creep, and hysteris with higher accuracy than before.

  In the present invention, the following features are provided alone or in combination as appropriate.

  In order to solve the above problems, a pressure-sensitive sensor according to the present invention includes a pressure-side sheet member in which a conductive layer containing conductive particles and a resin is applied to an electrode, and a conductive layer containing conductive particles and a resin. The receiving side sheet member applied to the sheet is opposed to each other, and the pressure is sensed by the resistance between the electrodes which can change depending on the contact area between the conductive layer of the pressure side sheet member and the conductive layer of the receive side sheet member. A pressure-sensitive sensor, wherein at least one of the conductive layer of the pressure-side sheet member and the conductive layer of the receive-side sheet member is formed on the electrode side, and the first And a second conductive layer formed on the opposite side of the electrode from the first conductive layer. The second conductive layer includes a larger amount of the conductive particles than the first conductive layer.

  According to the above configuration, when the conductive layer having the first conductive layer and the second conductive layer is in contact with the conductive layer of another sheet member, the first conductive layer, the second conductive layer, Of these, only the second conductive layer containing more conductive particles comes into contact with the other conductive layers. Therefore, the conductivity is improved when the conductive layers come into contact with each other, and the measurement accuracy regarding output responsiveness, creep, and hysteresis can be made superior to the conventional one.

  Moreover, in the pressure-sensitive sensor according to the present invention for solving the above-described problem, the other conductive layer different from the one conductive layer among the conductive layer of the pressure-side sheet member and the conductive layer of the receive-side sheet member. Has a third conductive layer formed on the electrode side and a larger amount of the conductive particles than the third conductive layer, and is further formed on the opposite side of the electrode than the third conductive layer. And a fourth conductive layer.

  According to the above configuration, the conductive layers of both the pressure-side sheet member and the receive-side sheet member have a conductive layer formed on the electrode side and a conductive layer that contains more conductive particles than the conductive layer formed on the electrode side. Layer. Therefore, only one of the conductive layer of the pressure side sheet member and the conductive layer of the receive side sheet member is more conductive than the conductive layer formed on the electrode side and the conductive layer formed on the electrode side. Compared to a pressure-sensitive sensor having a conductive layer containing a large amount of particles, it is possible to measure the output responsiveness, creep, and hysteresis with higher accuracy.

  Further, in the pressure-sensitive sensor according to the present invention for solving the above-mentioned problem, “the conductive particles in the third conductive layer are included in an amount of 5 to 30 parts by weight with respect to 100 parts by weight of the resin. , The conductive particles in the fourth conductive layer are contained in a range from a value exceeding 5 parts by weight to 30 parts by weight with respect to 100 parts by weight of the resin, or / and “the first The conductive particles in one conductive layer are included in an amount of 5 to 30 parts by weight with respect to 100 parts by weight of the resin, and the conductive particles in the second conductive layer are included in 100 parts by weight of the resin. In other words, it is preferably included within a range from a value exceeding 5 parts by weight to 30 parts by weight.

  According to the above-described configuration, it is possible to perform measurement with respect to output responsiveness, creep, and hysteresis with higher accuracy.

It is a perspective view of the tactile sensor concerning the embodiment of the present invention, and shows the state where a part of one sheet member was notched. (A) is a plan view showing one sheet member constituting a part of the tactile sensor shown in FIG. 1, and (b) showing the other sheet member constituting a part of the tactile sensor shown in FIG. FIG. It is a cross-sectional perspective view in a part of the tactile sensor shown in FIG. It is sectional drawing of the principal part of the tactile sensor shown in FIG. It is an expanded sectional view of the principal part shown in FIG. It is a graph which shows the result of having performed the creep rate test about the tactile sensor of Example 1 and the comparative example 1 which concern on this invention. It is a graph which shows the result of having performed a hysteresis test about the tactile sensor of Example 1 concerning the present invention. It is a graph which shows the result of having performed the hysteresis test about the tactile sensor of the comparative example 1. FIG. It is the schematic of the principal part of the pressurization apparatus for performing the responsiveness test about the tactile sensor of Example 1 and Comparative Example 1 which concerns on this invention. It is a graph which shows the result of having performed the responsiveness test about the tactile sensor of Example 1 which concerns on this invention, and Comparative Example 1. FIG. It is sectional drawing of the tactile sensor which concerns on the modification of embodiment of this invention.

  Hereinafter, embodiments of the pressure-sensitive sensor of the present invention will be described with reference to the drawings, taking the tactile sensor 100 as an example.

  As shown in FIGS. 1 and 2, the tactile sensor 100 according to the present embodiment is a sheet member in which long conductive portions 12 and 22 described later are formed on flexible film base materials 11 and 21. 10 and 20 and a connector 30 that fixes the sheet members 10 and 20 bonded so that the conductive portions of the elongated conductive portions face each other and can be connected to a power source (not shown).

  As shown in FIGS. 1, 2 (a) and 3, the sheet member 10 is long along the Y-axis direction on the film base 11 and on one side of the film base 11 (the surface inside the tactile sensor 100). A plurality of long conductive portions 12 that extend in a scale and are arranged side by side in the X-axis direction, and a plurality that are electrically connected to one end of each of the plurality of long conductive portions 12. Wiring 13 and a plurality of terminals 14 to which ends of the plurality of wirings 13 are electrically connected. The sheet member 10 corresponds to the pressure side sheet member of the present invention.

  The film substrate 11 is made of an insulating material such as PET, PEN, or polyimide, and has a thickness of any value within a range of 25 μm to 100 μm.

  The elongate conductive portion 12 is formed by applying a pressure-side electrode 12a formed on the surface of the film substrate 11 and pressure-sensitive conductive ink so as to cover the entire surface of the pressure-side electrode 12a. The conductive layer 12b is formed, and the conductive layer 12c is stacked on the conductive layer 12b. The conductive layer 12c is formed by further applying pressure-sensitive conductive ink in a state where the pressure-sensitive conductive ink applied to form the conductive layer 12b is dry.

  Note that the conductive layer 12b does not necessarily have to be in direct contact with and covered with the electrode 12a, and another material that does not impede energization may exist between the electrode 12a and the conductive layer 12b. Moreover, the conducting wire layer 12b and the conductive layer 12c do not necessarily need to be directly contacted and laminated, and another conducting layer, for example, may be formed between the conducting wire layer 12b and the conducting layer 12c.

  The electrode 12a consists of metal materials, such as gold | metal | money, silver, or copper, and has the thickness of either value in the range of 5 micrometers-15 micrometers. The electrode 12a is not limited to gold, silver, or copper, and may be made of any material as long as it easily conducts electricity.

  The conductive layer 12b includes conductive particles and a resin, and the electrical resistance value changes depending on the applied pressure. The conductive layer 12b is adjusted so that the conductive particles are included in an amount of 5 to 30 parts by weight with respect to 100 parts by weight of the resin.

  Similar to the conductive layer 12b, the conductive layer 12c includes conductive particles and a resin, and the electrical resistance value changes depending on the applied pressure. However, the conductive layer 12c contains conductive particles in a range of more than 5 parts by weight to 30 parts by weight with respect to 100 parts by weight of the resin, and contains more conductive particles than the conductive layer 12b. It is preferable.

  Examples of the above-mentioned conductive particles include carbon black particles, metal particles such as gold, silver, and copper, alloy particles, and particles made of a resin whose surface is coated with a metal or alloy. Any particle may be used. The primary particle diameter of the conductive particles described above can be any value within the range of 20 nm to 40 nm.

  Examples of the above-described resin include phenoxy resin, epoxy resin, and polyurethane resin.

  The wiring 13 and the terminal 14 are made of a metal material such as gold, silver, or copper, and have any thickness within a range of 5 μm to 15 μm, which is the same thickness as the electrode 12a. It is. In addition, the wiring 13 and the terminal 14 are not limited to gold, silver, or copper, and may be made of any material as long as it easily conducts electricity.

  As shown in FIGS. 1, 2 (b) and 3, the sheet member 20 is long along the X-axis direction on the film base 21 and on one side of the film base 21 (the face inside the tactile sensor 100). A plurality of long conductive portions 22 that extend in a scale and are arranged side by side in the Y-axis direction, and a plurality that are electrically connected to one end of each of the plurality of long conductive portions 22. Wiring 23a, a plurality of wirings 23b electrically connected to the other end of each of the long conductive portions 22, one end of each of the plurality of wirings 23a and a plurality of wirings 23b And a plurality of terminals 24 electrically connected. The sheet member 20 corresponds to the receive side sheet member of the present invention.

  The elongate conductive portion 22 is formed by applying a receive-side electrode 22a formed on the surface of the film substrate 21 and pressure-sensitive conductive ink so as to cover the entire surface of the receive-side electrode 22a. The conductive layer 22b is formed, and the conductive layer 22c is stacked on the conductive layer 22b. The conductive layer 22c is formed by further applying pressure-sensitive conductive ink in a state where the pressure-sensitive conductive ink applied to form the conductive layer 22b is dry.

  Note that the conductive layer 22b does not necessarily have to be in direct contact with and covered with the electrode 22a, and another material that does not impede energization may exist between the electrode 22a and the conductive layer 22b. In addition, the conductive wire layer 22b and the conductive layer 22c are not necessarily in direct contact with each other, and another conductive layer, for example, may be formed between the conductive wire layer 22b and the conductive layer 22c.

  Note that one of the conductive layers 12b and 22b corresponds to the first conductive layer of the present invention, and the other conductive layer corresponds to the third conductive layer of the present invention. That is, when the conductive layer 12b corresponds to the first conductive layer of the present invention, the conductive layer 22b corresponds to the third conductive layer of the present invention, and the conductive layer 22b corresponds to the first conductive layer of the present invention. In some cases, the conductive layer 12b corresponds to the third conductive layer of the present invention.

  When the conductive layer 12b corresponds to the first conductive layer of the present invention and the conductive layer 22b corresponds to the third conductive layer of the present invention, the conductive layer 12c corresponds to the second conductive layer of the present invention. The conductive layer 22c corresponds to the fourth conductive layer of the present invention. On the other hand, when the conductive layer 22b corresponds to the first conductive layer of the present invention and the conductive layer 12b corresponds to the third conductive layer of the present invention, the conductive layer 22c corresponds to the second conductive layer of the present invention. The conductive layer 12c corresponds to the fourth conductive layer of the present invention.

  Here, the film base material 21, the electrode 22a, the conductive layer 22b, the conductive layer 22c, the wiring 23a (23b), and the terminal 24 are in order of the film base material 11, the electrode 12a, the conductive layer 12b, the conductive layer 12c, the wiring 13 and Since it is the same as each terminal 14, detailed description is abbreviate | omitted.

  Next, the operation of the tactile sensor 100 will be described with reference to FIGS. 4 and 5. As shown in FIG. 4, the sheet members 10 and 20 in the tactile sensor 100 in the initial state (the state where no pressure is applied) are not in contact with each other (more specifically, the conductive layer 12c and the conductive layer 22c are in contact with each other). Not)

  Here, in the initial state of the tactile sensor 100 connected to the power source, when a predetermined relatively low pressure is applied from the sheet member 10 side, for example, as shown in FIG. 5, the conductive layer 12 c in the long conductive portion 12. And the conductive layer 22c in the long conductive portion 22 is in contact with each other and energized. At this time, the electrical resistance appears more rapidly than the conventional tactile sensor. Therefore, it can be said that the tactile sensor 100 of this embodiment is a sensor having excellent responsiveness such that pressure can be sensed more quickly than the conventional tactile sensor.

  When further pressure is applied, the conductive particles contained in the conductive layer 12c and the conductive layer 22c come into contact with each other, and the electric resistance value further changes. Thereby, it is possible to sense how much pressure is applied. The tactile sensor 100 of the present embodiment can sense a pressure in the range of 50 kPa to 500 kPa, but it can change the content of conductive particles in the conductive layer, change the film thickness, etc. By designing appropriately, the pressure sensing range can be adjusted.

  According to the tactile sensor 100 of this embodiment, the measurement regarding output responsiveness, creep, and hysteresis can be made superior to conventional ones.

  Next, examples of the tactile sensor according to the present invention will be described.

Example 1
A tactile sensor having the same configuration as the tactile sensor of the above embodiment was manufactured. Specifically, a PET film having a thickness of 25 μm is provided in a portion corresponding to the film substrate 11 in the sheet member 10 and the sheet member 20 in the sheet member 20, a silver electrode having a thickness of 8 μm in a portion corresponding to the electrode 12a and the electrode 22a, and conductive. A conductive layer having a thickness of 12 μm at a portion corresponding to the layer 12b and the conductive layer 22b, a conductive layer having a thickness of 3 μm at a portion corresponding to the conductive layer 12c and the conductive layer 22c, and an electrode having a thickness of 8 μm at a portion corresponding to the wirings 13, 23a and 23b. A tactile sensor according to this example was manufactured by forming silver terminals that are the same material as the electrodes 12a and 22a having a thickness of 8 μm at portions corresponding to the silver wiring and the terminals 14 and 24 that are the same material as the electrodes 12a and 22a. .

  In addition, the above-mentioned silver electrode, silver wiring, and silver terminal were formed by printing. The conductive layers corresponding to the conductive layer 12b and the conductive layer 22b are: bcetyl acetate: phenoxy resin (trade name PKHH manufactured by InChem): carbon black (trade name Vulcan XC-72R manufactured by CABOT): defoamer Kasei Co., Ltd. product name Disparon 1970) = 68.9: 25.5: 3.6: 2.0 The conductive ink obtained by blending was applied and dried. Here, the ratio of the phenoxy resin and carbon black in the conductive layer after drying is 14.2 parts by weight with respect to 100 parts by weight.

  The conductive layers corresponding to the conductive layer 12c and the conductive layer 22c are: bcetyl acetate: phenoxy resin (trade name PKHH manufactured by InChem): carbon black (trade name Vulcan XC-72R manufactured by CABOT): defoamer Kasei Co., Ltd. product name Disparon 1970) = 68.8: 25.5: 3.8: 2 The conductive ink obtained by blending was applied and dried. Here, the ratio of the phenoxy resin and carbon black in the conductive layer after drying is 14.8 parts by weight with respect to 100 parts by weight.

(Comparative Example 1)
A tactile sensor having the same configuration as that manufactured in Example 1 was manufactured except that conductive layers corresponding to the conductive layers 12c and 22c were not formed.

<Creep rate test>
For each of the tactile sensors of Example 1 and Comparative Example 1 described above, a creep rate test was performed. Specifically, for each of the tactile sensors of Example 1 and Comparative Example 1, changes with time in output under a constant load (250 kPa) were measured. The test result data is shown in Table 1 below, and a graph of the data is shown in FIG.

  From the results shown in Table 1 and FIG. 6, it can be understood that the creep rate is clearly lower in Example 1 than in Comparative Example 1. Therefore, it is clear that the tactile sensor of Example 1 can sense the pressurization with higher accuracy than that of Comparative Example 1.

<Hysteresis test>
A hysteresis test was performed on each of the tactile sensors of Example 1 and Comparative Example 1 described above. Specifically, five stages of load / pull-out were performed at 10-second intervals, and the output difference between the load and the load was measured. The test result data (Example 1) is shown in Table 2 below, and a graph of the data is shown in FIG. In addition, the test result data (Comparative Example 1) is shown in Table 3 below, and a graph of the data is shown in FIG. It is calculated as hysteresis (%) = ((output at the time of extraction−output at the time of load) / maximum output) × 100.

  From the results shown in Tables 2 and 3 and FIGS. 7 and 8, it can be understood that the hysteresis of Example 1 is clearly lower than that of Comparative Example 1. Therefore, it is clear that the tactile sensor of Example 1 can sense the pressurization with higher accuracy than that of Comparative Example 1.

<Response test>
A responsiveness test was performed on each of the tactile sensors of Example 1 and Comparative Example 1 described above. Specifically, the test was performed by pressurizing the tactile sensor using the pressurization apparatus (air cylinder) 200 having the configuration shown in FIG.

  9 includes a cylindrical cylinder tube 201, a piston rod 202 supported so as to be slidable in the central axis direction of the cylinder tube 201 (arrow direction in FIG. 9), And a pressing portion 203 (having a cylindrical portion 203a having a diameter of 18 mm at the tip) 203 provided at the tip of the piston rod 202.

  An air feeder (not shown) for feeding air into the cylinder tube 201 is connected to the cylinder tube 201 of the pressure device 200, and the piston rod 202 can be slid in the direction of the arrow in FIG. It can be done. Then, the piston rod 202 is slid and the object can be pressurized by the pressing portion 203.

  In the test, after the tactile sensor of Example 1 or Comparative Example 1 was inserted between the pressing part 203 and a flat surface (not shown), the air sent from the air feeder was changed into the cylinder tube 201. The piston rod 202 was moved to the flat surface side by air pressure so that a pressure of about 480 kPa was uniformly applied to the tactile sensor of Example 1 or Comparative Example 1 through the columnar portion 203a. The result of the test thus performed is shown in the graph of FIG.

  From the result of FIG. 10, it can be understood that the response of the first embodiment is clearly better than that of the first comparative example. Therefore, it is clear that the tactile sensor of Example 1 can sense the pressurization with higher accuracy than that of Comparative Example 1.

  As described above, the tactile sensor 100 according to the present embodiment includes the sheet member 10 formed so that the conductive layer including the conductive particles and the resin covers the electrode 12a, and the conductive layer including the conductive particles and the resin. The sheet member 20 formed so as to cover the electrode 22a is opposed, and the pressure is sensed by the resistance between the electrodes which can be changed according to the contact area between the conductive layer of the sheet member 10 and the conductive layer of the sheet member 20. It relates to a pressure sensor. In such a pressure-sensitive sensor 100, the conductive layer of the sheet member 10 is laminated on the conductive layer 12b formed on the electrode 12a side and the conductive layer 12b and is more conductive than the conductive layer 12b. And a conductive layer 12c containing a large amount of conductive particles. The position where the conductive layer 12c is laminated will be described in more detail. When the sheet member 10 is pressed, the most surface side (that is, the conductive layer 12b) is brought into contact with the conductive layer 22c formed on the sheet member 20. Further, it is laminated on the side opposite to the electrode 12a, in other words, on the other side of the conductive layer 12b with the electrode 12a.

  In addition, the conductive layer of the sheet member 20 includes a conductive layer 22b formed on the electrode 22a side, and a conductive layer 22c that is stacked on the conductive layer 22b and contains more conductive particles than the conductive layer 22b. is doing. The position where the conductive layer 22c is laminated will be described in more detail. When the sheet member 10 is pressed, the most surface side (that is, the conductive layer) is brought into contact with the conductive layer 12c formed on the sheet member 10. The layer 22b is laminated on the opposite side of the electrode 22a from the layer 22b, in other words, at a position sandwiching the conductive layer 22b with the electrode 22a.

  As described above, the conductive layer of the sheet member 10 is formed of two layers of the conductive layer 12b formed on the electrode 12a side and the conductive layer 12c containing more conductive particles than the conductive layer 12b. By forming the conductive layer of the member 20 in two layers of a conductive layer 22b formed on the electrode 22a side and a conductive layer 22c containing more conductive particles than the conductive layer 22b, the conductive layer 12c and the conductive layer 12c are electrically conductive. It is possible to provide a tactile sensor in which the conductivity when contacting with the layer 22c is improved as compared with the case of a single conductive layer, and the output responsiveness, measurement accuracy regarding creep and hysteresis are superior to those of the conventional one. .

  The conductive particles are carbon black, and the carbon black in the conductive layers 12b and 22b formed on the electrodes 12a and 22a side is included in an amount of 5 to 30 parts by weight with respect to 100 parts by weight of the resin. ing. Further, the carbon black in the conductive layers 12c and 22c laminated on the conductive layers 12b and 22b is included in a range from a value exceeding 5 parts by weight to 30 parts by weight with respect to 100 parts by weight of the resin. Preferably there is. By doing in this way, it becomes possible to perform the measurement accuracy regarding output responsiveness, creep, and hysteresis more reliably and with high accuracy.

  In addition, this invention is not limited to the said embodiment and Example, A various deformation | transformation is possible based on the meaning of this invention, and these are not excluded from the scope of the present invention. For example, in the above embodiments and examples, the conductive layers in both sheet members 10 and 20 have a two-layer structure, but only the conductive layer in one of the sheet members has a two-layer structure, and the other sheet. The conductive layer in the member may have a single-layer structure as in the case of the conventional pressure sensor.

  Moreover, in the said embodiment and Example, each of the conductive layer in both the sheet members 10 and 20 is the two-layered conductive layer (surface side conductive layers 12c and 22c are different from each other). The conductive particles 12b and 22b on the side of the electrodes 12a and 22a have a higher content of conductive particles), but only the conductive layer in either one of the sheet members has the content of conductive particles. It may have two different conductive layers. As an example, the configuration is as shown in FIG. Here, reference numerals 110, 111, 112 (112 a, 112 b, 112 c), 120, 121, 122 a, 122 b in FIG. 11 are in order, reference numerals 10, 11, 12 (12 a, 12 b, 12 c), Since it is the same part as 20, 21, 22a, and 22b, description is abbreviate | omitted. Also, the portions not shown are the same as those in the above embodiment, and thus the description thereof is omitted.

  Moreover, in the said embodiment and Example, although it became the arrangement | positioning which electrically conductive parts cross | intersect at right angle, it is not restricted to this, You may be crossed arrangement | positioning.

  Moreover, in the said embodiment and Example, although the conductive layer is formed so that the whole surface of an electrode may be covered, it is not necessary to cover the whole surface of an electrode, and the conductive layer was formed so that it might laminate | stack on an electrode. It may be a thing.

10, 20, 110, 120 Sheet member 11, 21, 111, 121 Film base 12, 22, 112, 122 Conductive part 12a, 22a, 112a, 122a Electrode 12b, 22b, 112b, 122b, 12c, 22c, 112c Conductive Layer 30 Connector 100, 200 Tactile sensor

Claims (4)

A pressure-side sheet member in which a conductive layer containing conductive particles and a resin is applied to an electrode, and a receive-side sheet member in which a conductive layer containing conductive particles and a resin are applied to an electrode are opposed to each other, and the pressure side A pressure-sensitive sensor that senses pressure by resistance between electrodes that can change according to a contact area between a conductive layer of a sheet member and a conductive layer of the receive-side sheet member;
At least one of the conductive layer of the pressure side sheet member and the conductive layer of the receive side sheet member is
A first conductive layer formed on the electrode side;
A second conductive layer that contains more conductive particles than the first conductive layer and is further formed on the opposite side of the electrode than the first conductive layer. Pressure sensor. Of the conductive layer of the pressure side sheet member and the conductive layer of the receive side sheet member, the other conductive layer different from the one conductive layer is:
A third conductive layer formed on the electrode side;
And a fourth conductive layer that contains more conductive particles than the third conductive layer, and is further formed on the opposite side of the electrode than the third conductive layer. Item 2. The pressure-sensitive sensor according to item 1. The conductive particles in the third conductive layer are included in an amount of 5 to 30 parts by weight with respect to 100 parts by weight of the resin,
The conductive particles in the fourth conductive layer are contained in a range from a value exceeding 5 parts by weight to 30 parts by weight with respect to 100 parts by weight of the resin. Pressure sensitive sensor. The conductive particles in the first conductive layer are included in an amount of 5 to 30 parts by weight with respect to 100 parts by weight of the resin,
The conductive particles in the second conductive layer are contained in a range of more than 5 parts by weight to 30 parts by weight with respect to 100 parts by weight of the resin. The pressure-sensitive sensor according to any one of the above.