JP6252845B2 - Nail vibration measuring device, nail vibration monitoring system and nail vibration feedback presentation system - Google Patents

Description

  The present invention relates to a nail vibration measuring device that measures nail vibration, a nail vibration monitoring system that performs display according to the measurement result of the nail vibration measuring device, and nail vibration feedback presentation that presents the measured information to a person by tactile stimulation About the system.

  Product tactile sensation is one of the important design parameters. However, the evaluation often relies on human sensory evaluation, and the design is often performed on a trial and error basis. The tactile sensation is because the human perception mechanism and the relationship between various tactile sensations are not clear.

  Until now, measurement of tactile sensation has been attempted from material properties such as the Young's modulus and surface roughness of things. Alternatively, it is attempted to measure tactile sensation by attaching a measuring device to an object and measuring the force and movement when a person is touching the object. However, sufficient tactile measurement has not been achieved.

  Further, in recent years, from the viewpoint that the tactile sensation is based on the mechanical interaction between an object and a person, and the information acquired by a person is based on the deformation of his / her finger or skin, for example, Patent Document 1, an artificial finger using a sensor element having a structure and characteristics similar to those of a human finger and having characteristics similar to a mechanoreceptor from which a human acquires tactile information is configured. By touching something like a human, we are trying to measure tactile sensation based on the vibration information acquired by the sensor element.

  In addition, although measurement of tactile sensation is not necessarily the purpose, there has been proposed a device that attaches a measurement device to a human body and measures the state of skin and fingers when the human is touching an object. For example, Non-Patent Document 1 proposes a device that attaches a piezoelectric element on a nail, measures vibrations generated on the nail, and identifies work performed using the finger. Further, in Patent Document 2, a strain gauge is attached on the nail, and the force applied to the finger pad when an object is touched with the finger pad is measured. In Patent Document 3, a flexible sheet is affixed to the nail, and a strain gauge is affixed to the sheet, for example, to evaluate the sense of fitting the switch. Further, in Non-Patent Document 2, a microphone floor is attached to the side surface portion of the finger pad, the vibration generated in the portion is measured, and the roughness evaluation is attempted.

JP 2007-333522 A JP 2001-265522 A JP 2008-171409 A

Y. Makino, T. Murao, T. Maeno: “Life log system based on tactile sound,” Proc. Of EuroHaptics 2010, Part I, LNCS 6191, pp.292-297, 2010. Y. Tanaka, Y. Horita, A. Sano, H. Fujimoto: “Tactile sens- ing utilizing human tactile perception,” Proc. Of IEEE World Haptics Conference 2011, pp.621-626, 2011.

  In Patent Document 1, an object is touched with an artificial finger. Therefore, adaptation is difficult in the case where complicated finger postures or movements are involved, such as a tactile sensation while holding a pen and writing, such as a writing feeling. It is necessary to develop an artificial finger having the same operation ability as a person.

  Patent Document 2, Patent Document 3, Non-Patent Document 1, and Non-Patent Document 2 can obtain information related to tactile sensation while being touched by humans. However, in Non-Patent Document 2, the sensor element is a side part of the finger pad. The sensor element may touch the object or other fingers under the condition of touching the object and handling the object such as writing, which is difficult to use. For these reasons, measuring the state of the nail is easy to avoid contact with things or other fingers, and in Patent Document 2, Patent Document 3, and Non-Patent Document 1, the vibration of the nail or Deformation is measured.

    However, in Patent Document 2, Patent Document 3, and Non-Patent Document 1, since the sensor element is affixed to the nail or a sheet along the nail with a relatively large area, the sensor element is three-dimensionally deformed. The amount corresponding to is detected. This makes it difficult to quantitatively evaluate the vibration itself generated in the nail.

  According to the study by the inventors of the present application, such an amount corresponding to the three-dimensional deformation of the nail is not necessarily optimal as an index for evaluating human tactile sensation. This is because there is no mechanoreceptor in the nail itself, and a person feels irritation to the nail through the mechanoreceptor that exists around the base of the nail. It is considered that there is a low possibility that the stimulus obtained by the mechanoreceptor existing around the nail root directly represents the three-dimensional deformation of the nail.

    In view of the above points, an object of the present invention is to provide an unprecedented measuring device in order to detect an amount from a nail that has a possibility of becoming a better index for evaluating human tactile sensation.

  In order to achieve the above object, the invention according to claim 1 is a beam-like member having flexibility, and measures a vibration of a nail having a nail contact member (11b) which contacts the nail at a point with a point. It is a nail vibration measuring device provided with the measurement member (11) for supporting, and the base member (12) with which the said measurement member is supported and with which a fingertip is mounted | worn.

  Thus, the inventors of the present application have conceived that the nail contact member (11b) is brought into point contact with the nail. In this way, information representing the deformation of the entire nail is not transmitted to the measurement member (11), but information representing simply the vibration of the point contact portion is transmitted to the measurement member (11). Such information is considered to be an amount having a possibility of becoming a better index for evaluating human tactile sensation. Further, the nail vibration measuring device can be adapted to a complicated movement operation of a used object (for example, a ballpoint pen) by being attached to a finger.

  According to a second aspect of the present invention, in the nail vibration measuring device according to the first aspect, the measuring member (11) includes a piezoelectric material. By doing in this way, compared with the case where sensor elements, such as a strain gauge, are used, the number of parts can be reduced and the structure of an apparatus can be simplified.

  The invention according to claim 3 is the nail vibration measuring device according to claim 1 or 2, wherein the base member (12) is a pinching portion for pressing both sides of the finger to pinch the finger. (12b, 12c). By doing in this way, it becomes less necessary to prepare many types of sizes of the base member (12) according to the size of the finger for each user, and the fixing of the base member (12) to the finger is strengthened. Can do.

  According to a fourth aspect of the present invention, in the nail vibration measuring device according to the third aspect, the base member (12) includes an anti-rotation member (12d), and the anti-rotation member (12d) When the base member (12) is in contact with the finger, the nail contact member (11b) is moved to the nail with the finger at the contact position between the pinching portions (12b, 12c) and the finger. The rotation is limited in the direction away from the head.

  By doing so, the posture of the base portion (12a) with respect to the finger is stabilized, and the contact between the nail contact member (11b) and the nail is strengthened.

  Further, the invention according to claim 5 is the nail vibration measuring device according to any one of claims 1 to 4, wherein the surface of the nail contact member (11b) where the nail contacts with the nail is The curved surface is convex with respect to the direction of the nail.

  In this way, the contact area between the nail contact member (11b) and the nail is less affected by individual differences and is stable.

  The invention according to claim 6 is a measurement member (11) for measuring vibration of a fingernail, and a base member (12) that supports the measurement member (11) and can be attached to the finger. ), The measurement member (11) is in contact with the claw contact member (11b) for making point contact with the claw, and the claw contact member (11b), and the claw contact member (11b) is interposed therebetween. And a detection unit (11a) for outputting a signal corresponding to the transmitted vibration when the vibration of the nail is transmitted.

  Thus, the inventors of the present application have conceived that the nail contact member (11b) is brought into point contact with the nail. In this way, information representing the deformation of the entire nail is not transmitted to the measurement member (11), but information representing simply the vibration of the point contact portion is transmitted to the measurement member (11). Such information is considered to be an amount having a possibility of becoming a better index for evaluating human tactile sensation. Further, the nail vibration measuring device can be adapted to a complicated movement operation of a used object (for example, a ballpoint pen) by being attached to a finger.

The invention according to claim 7 is a measurement member (11) for measuring vibration of a fingernail, and a base member (12) that supports the measurement member (11) and can be attached to the finger. ), And the measurement member (11) is in contact with the claw contact member (11b) for contacting the claw, and the claw contact member (11b), and via the claw contact member (11b). When the vibration of the nail is transmitted, the detection unit (11a) outputs a signal corresponding to the transmitted vibration, and the detection unit (11a) has a thin film shape, and the nail contact member ( 11b) and the nail contact area are smaller than the area of the surface of the detecting portion (11a) that protrudes from the base member (12) on the side facing the nail. Device.

  In this way, for example, the measurement member (11) and the detection member (11a) can be compared with the measurement member (11) as compared with the case where the portion protruding from the base member (12) in the distal direction is brought into direct contact with the nail. The contact area of the nail can be further reduced. As a result, information indicating the deformation of the entire nail is not easily transmitted to the detection unit (11a). Therefore, the vibration transmitted to the detection unit (11a) has a possibility of becoming a better index for evaluating human tactile sensation.

According to an eighth aspect of the present invention, the nail vibration measuring device (1) according to any one of the first to sixth aspects and the vibration of the nail measured by the nail vibration measuring device (1) are analyzed. It is a nail vibration monitoring system provided with the control apparatus (4) which performs, and the monitor (5) which displays the analysis result of the said control apparatus (4). With such a system, the user can visually confirm the measurement result. That is, it is possible to easily associate the tactile information obtained by the user with the measurement result.

According to a ninth aspect of the invention, the nail vibration measuring device (1) according to any one of the first to sixth aspects and the vibration measured by the measuring member (11) of the nail vibration measuring device. And a vibration forming member (8) that vibrates according to the nail vibration feedback presentation system. With such a system, it is possible to make a person perceive measured information through tactile sensation. Since the perception mechanism of human tactile sensation is not clear, there is no established method for analyzing information measured by a nail vibration measuring device. Therefore, by presenting the measured information to the person with tactile stimuli, the person can perceive it through tactile sensation and can be evaluated.

  Further, the invention according to claim 10 is the nail vibration feedback presentation system according to claim 9, wherein the vibration forming member (8) is a vibration presenting member for receiving feedback of vibration of the nail when touched by a person. (82), and the shape of the vibration presenting member (82) is different from the shape of the ballpoint pen.

  When the ballpoint pen is used with the nail vibration measuring device (1) attached to the finger, the vibration presenting member (82) having a shape different from that of the ballpoint pen as described above is generated in the nail when writing with the ballpoint pen. ), It may be possible to clearly feel the difference in writing feel.

  The invention according to claim 11 is the nail vibration feedback presentation system according to claim 9 or 10, wherein the vibration forming member (8) is a vibration for touching a person to receive feedback of the vibration of the nail. It has a presentation member (82), The shape of the said vibration presentation member (82) differs from the shape of a nail | claw, It is characterized by the above-mentioned.

  Thus, by reproducing the vibration generated in the nail with the vibration presenting member (82) having a shape different from that of the nail, it may be possible to clearly feel the difference in the tactile sensation of writing.

  The invention according to claim 12 is the nail vibration feedback presentation system according to claim 9, wherein the vibration forming member (8) generates vibration according to the vibration measured by the measuring member (11). A vibration generating member (81) that is touched by a person to receive feedback of vibration of the claw, provided in contact with the vibration generating member (81), and vibration of the vibration generating member (81) And a vibration presenting member (82) to which is transmitted.

  In this way, various tactile sensations can be presented with the same information according to the combination of the vibration generating member (81) and the vibration presenting member (82).

  The invention described in claim 13 is the nail vibration feedback presentation system according to any one of claims 10 to 12, wherein the vibration presentation member (82) is a cup-shaped or cylindrical-shaped member. It is characterized by that. In this way, it is possible to present a tactile sensation that is qualitatively different from the tactile sensation felt by the user (for example, a writer of a ballpoint pen) during measurement.

  The invention according to claim 14 is the nail vibration feedback presentation system according to any one of claims 9 to 13, comprising a plurality of the vibration forming members (8), wherein the plurality of vibration forming members. (8) is characterized in that it vibrates simultaneously according to the vibration measured by the measuring member (11) of the nail vibration measuring device. In this way, multiple people can share the same feedback information through the sense of touch. This is effective for promoting evaluation and examination on the measured information.

  Further, the invention according to claim 15 is the conversion device for converting the vibration measured by the measurement member (11) for each frequency in the nail vibration feedback presentation system according to any one of claims 9 to 14. (7), wherein the vibration forming member (8) vibrates according to the vibration after being converted by the conversion device (7). In this way, not only the evaluation of the information measured by the nail vibration measuring device (1) but also how the tactile sensation changes when the information is changed can be confirmed.

  The invention described in claim 16 is a method of manufacturing a tool using the nail vibration feedback presentation system (100) according to claim 15, wherein the nail vibration measurement of the nail vibration feedback presentation system (100) is performed. The apparatus (1) is mounted on a finger and a prototype is held and used with the finger, and the first setting is realized as the conversion setting for each frequency of the conversion device (7). The vibration forming member (8) is contacted with the member (8) to evaluate the vibration, the nail vibration measuring device (1) is mounted on a finger and the prototype is used with the finger, and the The second setting is realized as the conversion setting for each frequency of the conversion device (7), and the vibration forming member (8) is contacted with the vibration forming member (8) to evaluate the vibration, and the tool is used. Sometimes measured with the nail vibration measuring device (1) The higher setting of the first setting and the second setting is applied compared to the vibration measured by the nail vibration measuring device (1) using the prototype. A tool manufacturing method, characterized in that the tool is manufactured so that the tool is in a stale state.

  By adopting such a method, it is possible to manufacture a ballpoint pen by predicting the feeling of use of the tool without having to change the design and create a new prototype. This not only leads to a significant reduction in labor, but also leads to the realization of a new writing comfort (for example, a better comfort) that cannot be found when trial production is performed while creating a prototype.

It is a mimetic diagram showing the whole nail vibration monitoring system 10 composition in a 1st embodiment of the present invention. 1 is a perspective view of a nail vibration measuring device 1. FIG. 1 is a front view of a nail vibration measuring device 1. FIG. 1 is a side view of a nail vibration measuring device 1. FIG. 2 is a bottom view of the nail vibration measuring device 1. FIG. 1 is a plan view of a nail vibration measuring device 1. FIG. FIG. 3 is a diagram showing a state where the nail vibration measuring device 1 is attached to a finger 20. 4 is a graph showing an example of frequency characteristics of a signal acquired by the control device 4. It is a measurement result of the subject A obtained when the nail vibration monitoring system 10, the acceleration sensor, and the force sensor are used at the same time and measurement is performed when writing with the ballpoint pen. It is the measurement result of the test subject B obtained when the nail vibration monitoring system 10, the acceleration sensor, and the force sensor are used at the same time and measurement is performed when writing with the ballpoint pen. It is the measurement result of the subject C obtained when the nail vibration monitoring system 10, the acceleration sensor, and the force sensor are used at the same time and measurement is performed when writing with the ballpoint pen. It is the measurement result of the test subject D obtained when the nail vibration monitoring system 10, the acceleration sensor, and the force sensor are simultaneously used for measurement when writing with a ballpoint pen. It is a mimetic diagram showing the whole nail vibration feedback presentation system 100 composition concerning a 2nd embodiment. FIG. 4 is a view showing an appearance of a vibration forming member 8. It is a graph showing the difference of the frequency characteristic when not attaching with a soft grip. It is a mimetic diagram showing the whole nail vibration feedback presentation system 100 composition concerning a 3rd embodiment.

(First embodiment)
Hereinafter, the configuration of the nail vibration monitoring system 10 according to the first embodiment of the present invention will be described. As schematically shown in FIG. 1, the nail vibration monitoring system 10 of this embodiment includes a nail vibration measuring device 1, an amplifier 2, an A / D converter 3, a control device 4, and a monitor 5.

  The nail vibration measuring device 1 is a sensor that is attached to a person's finger and outputs an analog signal (detection signal) corresponding to vibration generated on the nail. The amplifier 2 amplifies the analog signal output from the nail vibration measuring device 1, and the A / D converter 3 samples the amplified analog signal and inputs it to the control device 4 as a digital signal (digital detection signal).

  The control device 4 performs analysis such as frequency analysis on the digital signal input from the A / D converter 3 and causes the monitor 5 to display the analysis result as an image. For example, a computer such as a personal computer or a workstation can be used as the control device 4.

  2 to 6 are a perspective view, a front view, a side view, a bottom view, and a plan view of the nail vibration measuring device 1. In the following, the tip direction, the anti-tip direction, the lateral direction, and the vertical direction are the directions shown in FIGS. The nail vibration measuring device 1 includes a measuring member 11, a base member 12, and a signal cable 13. The measurement member 11 includes a piezo film 11a (corresponding to an example of a detection unit) that is a flexible cantilever-like member, and a nail contact member 11b that contacts the piezo film 11a and makes point contact with the nail. And have.

  The piezo film 11a includes a piezoelectric element in which electrode films are formed on both surfaces of a sheet-like PVDF (polyvinylidene fluoride) which is a flexible piezoelectric material, and a piezoelectric element for electromagnetically shielding the piezoelectric element. And a resin tape sandwiched between the metal film and the electrode film to ensure insulation between one of the metal film and the electrode film (the non-ground electrode film). The metal film and the other of the electrode films (one that becomes the ground) are electrically connected.

  The piezoelectric element and the piezo film 11a have substantially the same size and shape, and have a rectangular film shape (thin film shape) as a whole. In this embodiment, the piezoelectric element and the piezo film 11a have a shape with a thickness of 0.5 mm, a width of 12 mm, and a length of 35 mm, but are not limited thereto.

  The claw contact member 11b is made of acrylic and has a hemispherical shape, and the plane portion of the hemisphere faces the lower side of the end of the piezo film 11a (more specifically, the resin film It is bonded to the surface facing downward. Note that this downward facing surface is the surface facing the human nail when the nail vibration measuring device 1 is mounted on the human finger. In this embodiment, the diameter of the hemisphere is 4 mm, but is not limited to this dimension.

  However, the area of the part where the nail contact member 11b contacts the nail and the area of the part where the nail contact member 11b contacts the piezo film 11a are much smaller than the area of the entire surface facing downward of the piezo film 11a. Furthermore, the area of the portion of the piezo film 11a that protrudes from the base member 12 in the distal direction is smaller than the area of the surface facing downward. In this way, for example, the contact area between the measuring member 11 and the nail is further increased as compared with a case where a portion of the piezo film 11a that protrudes from the base member 12 in the distal direction is brought into direct contact with the nail. Can be narrowed. As a result, information representing the deformation of the entire nail becomes difficult to be transmitted to the piezo film 11a.

  The base member 12 is a resin member for supporting the piezo film 11a. The opposite end side of the piezo film 11a (the side opposite to the side on which the claw contact member 11b is attached) is fixedly attached to the base member 12. The base member 12 is integrally formed with a main body portion 12a, two finger nipping portions 12b and 12c, and a rotation preventing portion 12d.

  The main body 12a is a resin member in which a plurality of slits for inserting the piezo film 11a are formed. The piezo film 11a is fixed to the base member 12 by press-fitting the piezo film 11a into these slits. Installed. In a state where the piezo film 11a is fixedly attached to the base member 12, the length of the piezo film 11a protruding from the base portion 12 in the distal direction is 7 mm, but is not limited to this dimension.

The finger nipping portions 12b and 12c are resin members formed integrally with the main body portion 12a, and from both sides of the end portion in the front end direction of the main body portion 12a (the end portion close to the nail contact member 11b), It extends almost straight in the direction. The length of the finger clamp portions 12b and 12c extending downward from the main body portion 12a is 1.5 cm or a length slightly larger or smaller than that.
As shown in FIG. 3, when the nail vibration measuring device 1 is viewed from the front, the main body portion 12a and the two finger clamp portions 12b and 12c have a downward arc shape. More specifically, it has a downward U-shape, but as another example, it may have a downward arc shape. These pinching portions 12b and 12c have flexibility so that when the nail vibration measuring device 1 is mounted on a human finger, the finger is pressed between both sides to pinch the finger. It can be done.

  The rotation preventing portion 12d is a plate-like member extending downward from the main body portion 12a at a position shifted by 1 cm (or a little longer or smaller length) in the anti-tip direction than the finger nipping portions 12b and 12c. The length of the rotation preventing portion 12d extending downward from the main body portion 12a is shorter than the length of the finger nipping portions 12b and 12c extending downward from the main body portion 12a. For example, the length is 5 mm or slightly longer or smaller. That's it.

  FIG. 7 shows a state where the nail vibration measuring device 1 is mounted on a finger 20 of a human hand. The wearing target finger may be any of a thumb, an index finger, a middle finger, a ring finger, and a little finger. As shown in this figure, the finger nipping part 12 b (and the finger nipping part 12 c (not shown)) and the rotation preventing part 12 d are located on the fingertip side (ie, the end node 22) and the nail 23 from the first joint 21 of the finger 20. Also, the nail vibration measuring device 1 is attached so as to come into contact with the base side of the finger.

  At this time, the end node 22 is sandwiched between the sandwiching portions 12b and 12c, and both side surfaces of the end node 22 are pressed by the elastic force of the flexible sandwiching portions 12b and 12c. Therefore, even when the finger 20 moves or an external force is applied to the nail vibration measuring device 1, the contact position between the clip portions 12 b and 12 c and the end node 22 is difficult to shift.

  Further, the lower end of the rotation preventing portion 12 d is in contact with the end node 22. In this way, the nail vibration measuring device 1 including the base member 12 is configured such that the nail contact member 11b is nail 23 with respect to the finger 20 around the contact position between the clip portions 12b and 12c and the terminal node 22. It is restricted (more specifically, prevented) from rotating in the direction away from the center. As a result, the posture of the base portion 12a with respect to the finger is stabilized, and the contact between the nail contact member 11b and the nail 23 is strengthened.

  Moreover, the nail | vibration measuring device 1 adapts to the difference of the magnitude | size of a certain amount of fingers because the clamping parts 12b and 12c are the arc shape which has flexibility. That is, if the size of the finger is within a certain range, the nail vibration measuring device 1 can be fixedly mounted. As a result, it is not necessary to prepare a large number of sizes of the base member 12 according to the finger size for each user, and the base member 12 can be strongly fixed to the finger.

  In addition, the nail contact member 11b fixed to the lower surface of the tip of the piezo film 11a with the nail vibration measuring device 1 attached to the finger 20 has one point at its lower end (spherical shape) at the nail 23. Point contact with the root side of. Here, the point contact means contact with a very narrow part of the nail, and if the contact is 10 square millimeters or less, it corresponds to the point contact.

  In the present embodiment, the surface of the nail contact member 11b that is in contact with the nail has a spherical surface that is convex with respect to the downward direction (the direction of the nail), so the contact area between the nail contact member 11b and the nail is large. It becomes difficult to be influenced by individual differences and stabilizes. If this is not the case and the surface of the nail contact member 11b in contact with the nail is a flat surface or a convex shape with respect to the upper direction, a human nail The contact area between the nail contact member 11b and the nail varies greatly according to individual differences in the unevenness. That is, the contact area between the claw contact member 11b and the claw becomes unstable.

  In addition, the nail contact member 11b and the nail 23 are not bonded, and the piezo film is in a bent state so that the hemisphere is pressed against the nail to some extent by using the elastic force of the piezo film 11a. The base portion 12 is fixed to the terminal node 22.

  In addition, the nail contact member 11 b contacts the nail 23 on the surface of the finger 20. Here, the root side of the nail 23 refers to a portion on the nail 23 such that the shortest distance to the root side end of the nail 23 is shorter than the shortest distance to the tip of the nail 23.

  The signal cable 13 is connected to the electrode film of the piezo film 11a at one end, and is connected to the amplifier 2 at the other end. The amplifier 2 receives an analog signal input from the nail vibration measuring device 1 via the signal cable 13.

  Here, the operation of the nail vibration monitoring system 10 will be described. When the nail vibration measuring device 1 is attached to the finger 20 as shown in FIG. 7, if any work is performed using the finger 20 (for example, writing with a ballpoint pen), the nail 23 is caused by the work. The vibration generated on the root side of the piezo is transmitted to the piezo film 11a through the claw contact member 11b. At this time, since the nail contact member 11b is in point contact with only one point on the base side of the nail 23, information indicating the deformation (vibration mode) of the entire nail 23 is not transmitted to the piezo film 11a, but simply the vibration of the one point. Only the information indicating is transmitted to the piezo film 11a. As a result, a voltage corresponding to the vibration transmitted by the piezo film 11 a is generated, and an analog signal indicating the voltage is input to the amplifier 2 via the cable 13.

  With this configuration, it is possible to provide a measuring device that can quantitatively evaluate vibration generated at the base of the nail. The amount representing such vibration is an amount that has a possibility of becoming a better index for evaluating human tactile sensation.

  The analog voltage signal obtained from the piezo film 11a is input to the A / D converter 3 via the amplifier 2, and is input from the A / D converter 3 to the control device 4 as a digital voltage signal. The control device 4 records voltage information (hereinafter referred to as measurement information) indicated by the input digital voltage signal in a memory. Further, the control device 4 performs frequency analysis such as FFT (Fast Fourier Transform) on the recorded measurement information instantaneously in real time (for example, with a delay within 0.1 seconds), and the analysis result is displayed on the monitor 5. Are displayed instantaneously (for example, with a delay within 0.1 seconds). Analysis results are updated as needed in real time. Thereby, during the operation of the nail vibration monitoring system 10, the analysis result of the measurement information can be visually displayed in correspondence with the tactile sensation obtained by the person who performs the above-described work (writing with a ballpoint pen, etc.). . With such a configuration, the user can visually confirm the measurement result instantaneously. That is, it is possible to easily associate the tactile information obtained by the user with the measurement result.

  FIG. 8 shows the results of an experiment in which the frequency characteristics of the nail vibration measuring device 1 are measured. In this experiment, the nail vibration measuring device 1 is not worn on the finger, but a vibrator that vibrates with the set amplitude and frequency is pressed against the nail contact member 11b to vibrate. And the voltage value which the digital voltage signal input into the control apparatus 4 according to the vibration shows is as FIG. The horizontal axis represents the frequency of vibration generated in the vibrator, and the vertical axis represents the voltage value indicated by the digital voltage signal input to the control device 4.

  The frequency at which the experiment was performed is a frequency within the range of 10 Hz to 2 kHz. This range is estimated as a range that does not greatly deviate from the vibration of the nail by writing based on the output value when the vibration of the nail 23 at the time of writing is measured using the nail vibration measuring device 1. The amplitudes of the vibrators that were tested are 0.13 μm, 0.24 μm, and 0.32 μm.

  Based on FIG. 8, the resonance frequency of the nail vibration measuring device 1 is 910 Hz, and the nail vibration measuring device 1 is not suitable for vibration measurement near this frequency. Also, low frequency vibrations of 30 Hz or less are difficult to measure because the output signal is small. However, vibration stimuli that can be perceived by humans are generally in the frequency range from 0 Hz to 1000 Hz, and it can be confirmed that the nail vibration measuring apparatus shown in FIG. 1 can be used for most of the bands. Thus, the resonance frequency of the nail vibration measuring device 1 may be 910 Hz or higher. The resonance frequency of the nail vibration measuring device 1 is determined by the length, width, thickness, Young's modulus, viscosity, and mass of the piezo film 11a protruding from the base member 12 in the distal direction.

  In order to confirm the effectiveness of the nail vibration measuring apparatus 1 shown in FIG. 1, the following experiment was performed. Two types of ballpoint pens (referred to as pen X and pen Y) that were clearly confirmed to have different writing feelings in the preliminary experiment were used in the experiment. The shape of these ballpoint pens is the same, the diameter of the grip portion is about 9.6 mm, and the mass is 7.0 g. Pen X and pen Y used different inks and balls. Pen X used oil-based ink and had a ball diameter of 0.7 mm. Pen Y used emulsion ink and had a ball diameter of 1.0 mm. Pen X had a heavy writing feeling, and Pen Y had a smooth writing feeling.

  There were 4 subjects (A, B, C, D) who performed the writing work, each age was 19-22 years old, all were male and right-handed. Each person wrote a straight line of about 18 cm in the left-right direction on the paper in one trial. The subject wore this device (nail vibration measuring device 1) on the thumb of the dominant hand. Further, in order to compare the measurement result obtained from the nail vibration measurement device 1 (that is, the analysis result output from the control device 4 to the monitor 5) with the measurement result of the conventional measurement device, the subject writes a ballpoint pen. Installed a uniaxial acceleration sensor (Showa Sokki Co., Ltd., 2302B) and simultaneously measured vibration in a direction parallel to the straight line to be written. Furthermore, a 6-axis force sensor (NITTA Corporation, IFS-67M25A25-I40) was installed under the paper surface, and vibrations in the left-right direction and the vertical direction (direction perpendicular to the paper surface) were simultaneously measured. The subjects were instructed to feel the difference in writing feeling between the two ballpoint pens with natural writing. The writing speed was instructed to be about 2 seconds. The test subject made 10 trials 5 times for each of the two ballpoint pens.

  9 to 12 show the experimental results obtained for subjects A, B, C, and D, respectively. In each figure, the nail vibration measuring device 1, the acceleration sensor output, the left-right vibration detected by the six-axis force sensor, and the vertical vibration detected by the six-axis force sensor are shown in order from the top. In each of the five trials of each ball-point pen, the recorded measurement information was subjected to frequency analysis by FFT, the power spectral density (PSD) for each frequency was obtained, and the average value of the five trials was obtained. Furthermore, since the magnitude of the signal differs in each measuring device, the PSD value of each frequency was divided by the maximum PSD value in pen X or pen Y for each subject, and a relative evaluation value was obtained.

  As can be seen from FIG. 9 to FIG. 12, the measurement results using the nail vibration measuring device 1 showed that the vibration was large in the range of 200 to 400 Hz in any subject. Further, when the pen X and the pen Y were compared, the vibration of the pen Y was small in 3 out of 4 people, and a clear difference was seen. On the other hand, the difference in the measurement result of the ballpoint pen using the acceleration sensor was slight, and the difference was hardly seen in the 6-axis force sensor.

  It is considered that the vibration of the nail by the ballpoint pen is originally caused by the vibration of the ballpoint pen itself. However, a clear difference in vibration of the ballpoint pen itself was not obtained from the experimental results. This is probably because the human finger acts as a mechanical filter, and as a result of the vibration of the ballpoint pen being transmitted to the human finger, the difference due to the difference in the ballpoint pen became clear. With respect to the ballpoint pen used in this experiment, the effect of the mechanical filter on the human finger or skin can be inferred from the fact that the human can distinguish the touch when writing. In addition, vibration stimulation having a frequency near 250 Hz is easily perceived by humans. From the human perceptual characteristics, it can be considered that the vibration of the nail contributes to the formation of writing sensation when the results of FIGS. The pen Y has a smooth writing feeling compared to the pen X. In the results shown in FIGS. 9 to 12, the pen Y has a smaller PSD at around 100 to 400 Hz than the pen X, and the actual touch feeling. We can ask about relevance. In view of this result, even if the resonance frequency of the nail vibration measuring device 1 is less than 910 Hz, if it is 500 Hz or more, a somewhat meaningful analysis is possible.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. FIG. 13 shows the overall configuration of the nail vibration feedback presentation system 100 in the present embodiment. The nail vibration feedback presentation system 100 includes a nail vibration monitoring system 10 having the same configuration as that of the first embodiment, an amplifier 6, an equalizer 7, and a vibration forming member 8.

  The amplifier 6 amplifies, maintains, or attenuates the analog voltage signal output from the amplifier 2 with the amplification factor set by the user and outputs the analog voltage signal to the equalizer 7. The equalizer 7 (corresponding to an example of the conversion device) is an electric circuit that converts or maintains the intensity of the analog voltage signal input from the amplifier 6 according to the setting of the user, and vibrates the converted analog signal. Output to the forming unit 8.

  FIG. 14 shows the appearance of the vibration forming unit 8. The vibration forming unit 8 includes a vibration generating member 81, a vibration presenting member 82, and a cable 83.

  The vibration generating member 81 is a vibration actuator that vibrates in accordance with an analog voltage signal input from the equalizer 7 via the cable 83. Specifically, it may be a vibration actuator (for example, a speaker) including an electromagnet that generates a magnetic force according to an analog voltage signal input from the equalizer 7.

  The vibration presenting member 82 is a member that is touched by a person and receives feedback of the vibration of the nail, and is provided in contact with the vibration generating member 81 so that the vibration of the vibration generating member 81 is transmitted. The shape of the vibration presentation member 82 is a cup shape, and is in contact with the vibration generating member 81 at the bottom of the cup shape.

  The operation of the nail vibration monitoring system 10 in the nail vibration feedback presentation system 100 is the same as that of the first embodiment. Hereinafter, operations of the amplifier 6, the equalizer 7, and the vibration forming member 8 will be described.

  During operation of the nail vibration feedback presentation system 100, with the nail vibration measuring device 1 attached to the finger 20 as shown in FIG. 7, some work is performed using the finger 20 (for example, writing with a ballpoint pen). In this case, as in the first embodiment, an analog voltage signal corresponding to the vibration at the base of the nail is generated in the piezo film 11a, and the generated analog voltage signal is input to the amplifier 2, and the amplifier 2 converts the analog voltage signal into the A / D converter 3 Is output.

  At this time, the analog voltage signal output from the amplifier 2 is also input to the amplifier 6, and is amplified, maintained, or attenuated by the amplifier 6 according to a user setting, and then input to the equalizer 7. In the equalizer 7, as described above, the intensity for each frequency of the analog voltage signal input from the amplifier 6 is converted or maintained according to a user setting and output to the vibration forming member 8.

  Then, the vibration generating member 81 generates vibration according to the analog voltage signal, and this vibration is transmitted to the vibration presenting member 82, and the vibration presenting member 82 vibrates. At this time, the subject holds the vibration presentation member 82.

  Therefore, the subject holding the vibration presentation member 82 can experience the vibration of the nail detected by the nail vibration measurement device 1 by the vibration of the vibration presentation member 82. In this way, the vibration forming member 8 can feedback-present the vibration information of the nail 23 detected by the vibration measuring device 1.

  Here, the voltage signal generated by the nail vibration measuring device 1 remains an analog signal until it is input to the vibration forming member 8. In this way, the voltage signal generated by the nail vibration measuring device 1 is input to the vibration forming member 8 without being digitally sampled for digitization. In this way, the vibration forming member 8 can reproduce the vibration of the claw 23 (feedback presentation) without losing a part of information by digital sampling.

  In addition, this test subject may be the user who is performing the said operation | work (for example, operation | work which writes with a ball-point pen), or another user may be sufficient as it. In the former case, for example, the user wears the nail vibration measuring device 1 on the finger of one hand and performs writing with a ballpoint pen, and the vibration presenting member 82 is placed with the hand not wearing the nail vibration measuring device 1. You can grab and receive this feedback.

  In order to confirm the effectiveness of the nail vibration feedback presentation system 100 in the present embodiment, the following experiment was performed. Two ballpoint pens with slightly different tactile sensations at the time of writing are prepared. Using the nail vibration feedback presentation system 100, signals obtained by using the nail vibration measuring device 1 at the time of writing each ballpoint pen are indicated to the nail vibration measuring device 1. The feedback was presented to the user who wears it or to other users. As a result, the tactile sensation obtained from the vibration forming unit 8 having the cup-shaped vibration presentation member 82 was qualitatively different from the tactile sensation obtained from the ballpoint pen during writing. Further, regarding the difference in tactile sensation between the two prepared ballpoint pens, the tactile sensation obtained from the vibration forming unit 8 was clearly felt rather than the tactile sensation obtained from the ballpoint pen at the time of writing. As another example, even when the shape of the vibration presentation member 82 is a cylindrical shape that is not bottomed, the difference in tactile sensation between the two ballpoint pens can be clearly felt.

  Humans depend on the situation in the sense of touch. For example, two cups having the same shape are prepared, a microphone is attached to the bottom of one cup, and a vibration actuator is attached to the other cup. Roll the glass ball in the cup with the microphone, hold the cup with the other vibration actuator in hand, and send the signal obtained by the microphone to the vibration actuator, there is no glass ball for the cup Nevertheless, you can feel as if a glass ball is spinning in the cup. However, if this combination is changed and, for example, a cup with a vibration actuator attached is made into a box in which the vibration actuator is embedded, it is not possible to feel the tactile sensation of a glass ball rotating. As described above, when feedback is presented in a situation (in the above case, a cup) different from the situation where the ballpoint pen is held and written, a different perception may occur. This is converted into a tactile sensation that is quantitatively or qualitatively and enables its evaluation, which leads to a multifaceted and deep analysis, and is effective for evaluation.

  Therefore, also in this embodiment, the vibration generated in the nail when writing with the ballpoint pen is reproduced by the cup-shaped vibration presentation member 82 whose shape and properties are completely different from those of the ballpoint pen and the nail. It is thought that the difference can be clearly felt. In particular, among the cup-shaped objects, a paper cup was used as the vibration presenting member 82, so that the difference in the tactile sensation of writing could be remarkably felt. This is presumed to be due to the good compatibility between the vibration generated in the nail when writing with a ballpoint pen and the cup. Moreover, since the vibration generating member 81 and the vibration presenting member 82 are provided separately, various tactile sensations can be presented even with the same information by changing the combination thereof.

  Moreover, about the tactile sensation at the time of writing of a ball-point pen, about the signal obtained using the nail vibration feedback presentation system using the nail vibration measuring device, the high frequency (10 kHz and its surroundings), the low frequency ( 100 Hz and its surroundings) is attenuated, a medium frequency signal (2.5 kHz and its surroundings) between the high frequency and the low frequency is amplified, and the vibration forming member 8 using the cup-shaped vibration presenting member 82 is used. Presented feedback. Then, the presented tactile sensation is different between the case where the signal is converted as described above and the case where the signal is not converted, and the case where the signal is converted as described above is more comfortable. Specifically, the tactile sensation, such as a tingling sensation, decreased, and the whole felt vibration, but felt smooth. Therefore, it is possible to confirm not only the evaluation of the measured information but also how the tactile sensation changes when the information is changed. This is considered to be useful information for examining what kind of tactile sensation is designed.

  For example, the frequency analysis result of the control device 4 when the user wears the nail vibration measuring device 1 on a finger and performs writing with a soft grip attached to a certain ballpoint pen is the dotted line in FIG. Further, the result of frequency analysis of the control device 4 when writing was performed with the soft grip removed from the ballpoint pen, was the solid line in FIG. According to this experimental result, when the soft grip is attached, the PSD decreases in a band higher than a specific boundary frequency (200 Hz in the example of FIG. 15), compared with the case where the soft grip is not attached. In the lower band, PSD tends to increase.

  Based on this tendency, the nail vibration feedback presentation system 100 of the present embodiment can be used to reflect the design of the ballpoint pen. Specifically, a ballpoint pen without a soft clip is prototyped, and the vibration generated at the base of the fingernail when writing with the ballpoint pen using the nail vibration feedback presentation system 100 is performed with the nail vibration measuring device 1. It is detected and feedback is presented by the vibration forming member 8.

  Specifically, first, the equalizer 7 is operated so that any frequency is maintained without being amplified or attenuated. Such a conversion setting for each frequency is defined as a first setting A. After realizing the first setting A, the vibration presenting member 82 is gripped, and the vibration presented by the vibration forming member 8 is experienced and evaluated. The sense received at this time is defined as sense A.

  Next, the equalizer 7 is operated so as to amplify a band lower than the boundary frequency and attenuate a band higher than the boundary frequency. Such a conversion setting for each frequency is defined as a second setting B. After realizing the second setting B, the vibration presenting member 82 is gripped, and the vibration presented by the vibration forming member 8 is feedback and evaluated. The sense received at this time is defined as sense B. If the writing feeling (use feeling) of sensation B is more comfortable and smooth than sensation A (that is, if the evaluation is higher), it is judged that this ballpoint pen should be manufactured and sold with a soft grip. Like that. As a result, even if the ballpoint pen manufactured with the soft grip is not converted by the equalizer 7, the vibration measured (detected) by the nail vibration measuring device 1 at the time of use is measured using the prototype ballpoint pen. Compared with the vibration measured (detected) by the apparatus 1, the conversion of the setting B is performed.

  In this way, it becomes clear whether it is better to attach a soft grip or not, without actually having to test the writing comfort by attaching a soft grip to the prototype. In the above example, a design that can be changed relatively easily, such as whether or not a soft grip is attached, has been described as an example. However, it is not easy to change the design (for example, the thickness of a ballpoint pen, In the example replaced with shape etc., it is possible to predict the writing comfort (use feeling) without having to change the design and create a new prototype, and to manufacture and sell a ballpoint pen with a better writing comfort is a significant reduction in labor. It leads to. Moreover, not only a significant reduction in labor, but also a new writing comfort (for example, a better comfort) that cannot be found when trial manufacture and manufacturing are performed while creating a prototype.

  Note that the product manufacturing method using the nail vibration feedback presentation system 100 is not limited to a ballpoint pen, and can be applied to any tool (such as a writing instrument) that a person uses with a finger. .

(Third embodiment)
Next, a difference between the third embodiment of the present invention and the second embodiment will be described. FIG. 16 shows the overall configuration of the nail vibration feedback presentation system 100 in the present embodiment. The nail vibration feedback presentation system 100 of the present embodiment is different from the second embodiment in that a vibration forming member 8a having the same configuration and function as the vibration forming member 8 in addition to the vibration forming member 8, as shown in FIG. Reference numerals 8 b and 8 c are connected to the equalizer 7. Other configurations are the same as those of the second embodiment.

  The equalizer 7 converts or maintains the intensity of the analog voltage signal input from the amplifier 6 as described above for each frequency according to the user's setting, and applies these vibration forming members 8, 8a, 8b, 8c to Output simultaneously. Therefore, each vibration formation member 8, 8a, 8b, 8c presents the vibration according to this analog voltage signal simultaneously.

The usage and operation of the nail vibration feedback presentation system 100 in this embodiment are the same except that each of the vibration presentation members 82 of the vibration forming members 8, 8a, 8b, 8c is gripped by a different person. .
In this way, the vibration of the nail when a certain user is writing with a ballpoint pen is simultaneously applied to a plurality of persons holding the vibration presentation members 82 of the vibration forming members 8, 8 a, 8 b, and 8 c. Feedback will be presented. Therefore, a plurality of people can share the same feedback information through the sense of touch. Since tactile sensation is difficult to express and methods for communicating information quantitatively have not been fully established, a method that allows multiple people to share tactile sensation through actual experience can encourage evaluation and examination of measured information. It is valid.

(Other embodiments)
In addition, this invention is not limited to above-described embodiment, In the range described in the claim, it can change suitably. Further, the above embodiments are not irrelevant to each other, and can be combined as appropriate unless the combination is clearly impossible. In each of the above-described embodiments, it is needless to say that elements constituting the embodiment are not necessarily indispensable except for the case where it is clearly indicated that the element is essential and the case where the element is clearly considered essential in principle. Yes. Further, in each of the above embodiments, when numerical values such as the number, numerical value, quantity, range, etc. of the constituent elements of the embodiment are mentioned, it is clearly limited to a specific number when clearly indicated as essential and in principle. The number is not limited to the specific number except for the case. Further, in each of the above embodiments, when referring to the shape, positional relationship, etc. of the component, etc., the shape, unless otherwise specified and in principle limited to a specific shape, positional relationship, etc. It is not limited to the positional relationship or the like. For example, the following modifications are allowed. In addition, the following modifications can select application and non-application to the said embodiment each independently. In other words, any combination of the following modifications can be applied to the above-described embodiment.

(Modification 1)
In the third embodiment, only one equalizer 7 is provided and connected to all the vibration forming members 8, 8a, 8b, and 8c. However, this is not necessarily required. For example, the same number of equalizers 7 as the vibration forming members 8, 8a, 8b, and 8c may be prepared and connected to the vibration forming members 8, 8a, 8b, and 8c on a one-to-one basis. By doing in this way, amplification, maintenance, and attenuation for each frequency of the vibration forming members 8, 8a, 8b, and 8c can be set independently. In this case, the plurality of equalizers 7 are connected to the amplifier 6.

(Modification 2)
In each of the above-described embodiments, only one nail vibration monitoring system 10 or nail vibration feedback presentation system 100 is prepared, the nail vibration measuring device 1 is attached to only one finger, and nail vibration is acquired only for that finger. And presents frequency analysis or feedback.

  However, this is not always necessary. A plurality of nail vibration monitoring systems 10 or nail vibration feedback presentation systems 100 are prepared, and the nail vibration measuring device 1 is attached to three fingers (thumb, forefinger, middle finger) of the same hand, Vibrations may be acquired and frequency analysis or feedback presented.

  In this modification, all or some of the amplifier 2, the A / D converter 3, the control device 4, the amplifier 6, and the equalizer 7 are provided with a plurality of nail vibration monitoring systems 10 or a plurality of nail vibration feedbacks. It may be shared among the systems 100.

  Moreover, the vibration presentation member 82 may also be shared among the plurality of nail vibration feedback presentation systems 100. Specifically, three different vibration generating members 81 are attached to three positions on the bottom surface of the vibration presenting member 82 made of one paper cup, and each of the three motion generating members 81 has different three nail vibration feedback presentation systems 100. It may be a part of. In this case, each vibration generating member 81 transmits the vibration detected by three different nail vibration measuring devices 1 to the same one vibration presenting member 82. In this way, there is a possibility that a person holding the vibration presentation member 82 can experience a sensation closer to that of a real ballpoint pen.

  Each of the three paper cups may be divided into three vibration presentation members 82 of three different nail vibration feedback presentation systems 100. In this case, each vibration generating member 81 of the three nail vibration feedback presentation system 100 may be attached to each of the three paper cup pieces separated. Also in this case, there is a possibility that a person who holds all of the three paper cups separated with one hand can experience a sensation closer to that of an actual ballpoint pen.

(Modification 3)
In each of the above embodiments, the piezo film 11a is used as an example of the detection unit. However, as the detection unit, a member other than the piezo film 11a may be employed as long as it is a member that outputs a signal corresponding to the vibration of the nail transmitted through the nail contact member 11b. For example, a strain gauge may be used as the detection unit instead of the piezo film 11a. Note that when the sensor element such as a strain gauge is used and the case where the piezo film 11a is used, the latter has a smaller number of parts and the configuration of the apparatus can be simplified.

(Modification 4)
In the said embodiment, since the surface of the location which contacts a nail | claw of the nail | claw contact member 11b is a spherical surface convex with respect to a downward direction (claw direction), the contact area of the claw contact member 11b and a nail | claw is It becomes difficult to be influenced by individual differences and stabilizes. However, for such an effect, the surface of the part does not necessarily have to be a spherical surface, and any surface may be used as long as it is a curved surface convex in the downward direction (the direction of the nail).

  In addition, when the contact area between the nail contact member 11b and the nail may be easily influenced by individual differences for some reason, the surface is a flat surface or a convex shape with respect to the upward direction. It may be.

(Modification 4)
In the first and third embodiments, the fingernail vibration measuring device 1 is attached to a finger, and only writing using a ballpoint pen is illustrated as an operation performed with the finger, but a tool is held with the finger. If it is work, the kind of tool is not ask | required. For example, the work may be writing using a writing instrument other than a ballpoint pen.

1 Nail vibration measuring device 4 Control device 5 Monitor 7 Equalizer (conversion device)
8, 8a, 8b, 8c Vibration forming member 10 Nail vibration monitoring system 11 Measuring member 11a Piezo film (detection unit)
11b Claw contact member 12 Base members 12b, 12c Clamping portion 12d Anti-rotation member 100 Nail vibration feedback presentation system

Claims (16)

A measuring member (11) for measuring vibration of a nail, which is a beam-like member having flexibility, and has a nail contact member (11b) that comes into contact with the nail at a point at the tip;
A nail vibration measuring device comprising: a base member (12) that supports the measuring member and is attached to a fingertip.   The nail vibration measuring device according to claim 1, wherein the measuring member includes a piezoelectric material.   The nail vibration measuring device according to claim 1 or 2, wherein the base member (12) has a pinching portion (12b, 12c) for pressing both sides of the finger to pinch the finger.   The base member (12) includes an anti-rotation member (12d), and the anti-rotation member (12d) abuts on the finger so that the base member (12) is sandwiched with respect to the finger. The rotation of the nail contact member (11b) in a direction away from the nail around the contact position between the portion (12b, 12c) and the finger is limited. The nail vibration measuring device described.   The surface of the part which contacts the said nail | claw among the said nail | claw contact members (11b) is a curved surface convex with respect to the direction of the said nail | claw, It is any one of Claim 1 thru | or 4 characterized by the above-mentioned. The nail vibration measuring device described. A measuring member (11) for measuring the vibration of the fingernail;
A base member (12) that supports the measurement member (11) and is attachable to the finger;
The measuring member (11)
A claw contact member (11b) for making point contact with the claw;
A detector (11a) that contacts the claw contact member (11b) and outputs a signal corresponding to the transmitted vibration when the vibration of the claw is transmitted through the claw contact member (11b); A nail vibration measuring device comprising: A measuring member (11) for measuring the vibration of the fingernail;
A base member (12) that supports the measurement member (11) and is attachable to the finger;
The measuring member (11)
A claw contact member (11b) for contacting the claw;
A detector (11a) that contacts the claw contact member (11b) and outputs a signal corresponding to the transmitted vibration when the vibration of the claw is transmitted through the claw contact member (11b); Have
The detection part (11a) has a thin film shape,
The contact area between the claw contact member (11b) and the claw is smaller than the area of the surface of the detection portion (11a) on the side facing the claw of the portion protruding from the base member (12). Nail vibration measuring device. Nail vibration measuring device (1) according to any one of claims 1 to 6,
A control device (4) for analyzing the vibration of the nail measured by the nail vibration measuring device (1);
A nail vibration monitoring system comprising: a monitor (5) for displaying an analysis result of the control device (4). Nail vibration measuring device (1) according to any one of claims 1 to 6,
A nail vibration feedback presentation system comprising: a vibration forming member (8) that vibrates according to the vibration measured by the measurement member (11) of the nail vibration measuring device. The vibration forming member (8) includes a vibration presenting member (82) for receiving feedback of vibration of the nail when touched by a person,
The nail vibration feedback presentation system according to claim 9, wherein the shape of the vibration presentation member (82) is different from the shape of a ballpoint pen. The vibration forming member (8) includes a vibration presenting member (82) for receiving feedback of vibration of the nail when touched by a person,
The nail vibration feedback presentation system according to claim 9 or 10, wherein the shape of the vibration presentation member (82) is different from the shape of the nail. The vibration forming member (8) includes a vibration generating member (81) that generates vibration according to the vibration measured by the measuring member (11),
The vibration presenting member (82) is a member that is touched by a person and receives feedback of the vibration of the nail, is provided in contact with the vibration generating member (81), and transmits the vibration of the vibration generating member (81). The nail vibration feedback presentation system according to claim 9, further comprising:   The nail vibration feedback presentation system according to any one of claims 10 to 12, wherein the vibration presentation member (82) is a cup-shaped or cylindrical-shaped member. A plurality of the vibration forming members (8);
The plurality of vibration forming members (8) vibrate simultaneously according to the vibration measured by the measuring member (11) of the claw vibration measuring device. The nail vibration feedback presentation system described. A conversion device (7) for converting the vibration measured by the measurement member (11) for each frequency;
The nail vibration feedback presentation system according to any one of claims 9 to 14, wherein the vibration forming member (8) vibrates according to the vibration after being converted by the conversion device (7). . A method for manufacturing a tool using the nail vibration feedback presentation system (100) according to claim 15,
The nail vibration measurement device (1) of the nail vibration feedback presentation system (100) is mounted on a finger and a prototype is used with the finger, and the conversion setting for each frequency of the conversion device (7) is used. After realizing the first setting, the vibration forming member (8) is contacted with the vibration forming member (8), and the vibration of the vibration forming member (8) is evaluated.
In addition to using the nail vibration measuring device (1) on a finger and holding the prototype with the finger, the second setting is realized as the setting of conversion for each frequency of the conversion device (7). In contact with the vibration forming member (8), the vibration of the vibration forming member (8) is evaluated,
The vibration measured by the nail vibration measuring device (1) when using the tool is compared with the vibration measured by the nail vibration measuring device (1) using the prototype, and the first setting and the A tool manufacturing method, wherein the tool is manufactured such that the higher setting of the second setting is applied.

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