JP5942523B2 - Saddle with pickup function - Google Patents

Description

  The present invention relates to a saddle with a pickup function.

  When the performance sound of a stringed instrument such as an acoustic guitar is amplified and output electrically, a pickup that detects vibration of the stringed instrument and outputs it as an electric signal is used, and the electric signal from this pickup is amplified by an amplifier. Sound is output electrically.

  As the pickup, a pickup mounted on the body of a stringed instrument and including a piezoelectric element is widespread. This piezoelectric element has a structure in which a piezoelectric body (piezoelectric film) is sandwiched between two electrodes, and is configured to generate a voltage between the electrodes by deformation of the piezoelectric body when subjected to pressure due to vibration.

  In order to electrically output a high-quality sound that is closer to the original sound of a stringed instrument using such a pickup, it is preferable to detect string vibration that contains as little noise (vibration other than strings) as possible. From this point of view, a saddle with a pickup function in which the pickup is incorporated into a saddle (string support) has been devised to facilitate transmission of string vibration to the pickup, and in order to improve the detection of string vibration, A saddle with a pickup function in which a bone member is interposed between the pickup and the pickup (see Japanese Utility Model Publication No. 6-60899) has been developed.

  However, the conventional saddle has a structure in which the vibration of the body is inevitably detected simultaneously with the vibration of the string because the pickup is in contact with a part of the body (bridge). For this reason, a signal in which the body vibration is mixed with the string vibration is output, and it is not sufficiently achieved to output the string vibration with less noise as an electric signal.

Japanese Utility Model Publication No. 6-60899

  The present invention has been made based on the above-described circumstances, and an object of the present invention is to provide a saddle with a pickup function that can output string vibration as an electric signal while suppressing mixing of body vibration. .

The invention made to solve the above problems is
A saddle with a pickup function that outputs the vibration of a stringed instrument as an electrical signal,
A saddle body having a plurality of string contact positions on the upper surface side;
And a piezoelectric sensor disposed in the saddle body,
The rigidity is different between the upper part and the lower part of the piezoelectric sensor in the saddle body.

  Since the saddle with a pickup function has different rigidity between the upper part and the lower part of the saddle body, bending deformation due to trunk vibration (bending vibration) is regulated by the higher rigidity of the upper part and the lower part. As a result, it becomes difficult for pressure due to cylinder vibration to be applied to the piezoelectric sensor disposed in the saddle body, and detection of cylinder vibration of the piezoelectric sensor is suppressed. Therefore, the saddle with a pickup function can output an electric signal mainly caused by string vibration while suppressing mixing of body vibration.

  As means for varying the rigidity of the upper part and the lower part, materials having different Young's moduli may be used for the upper part and the lower part. Thus, by using materials having different Young's moduli for the upper and lower parts of the piezoelectric sensor as the constituent material of the saddle body, the rigidity of the upper part and the lower part can be easily and reliably changed. The above-described body vibration detection suppressing action is easily and reliably exhibited.

  Further, as the means for varying the rigidity of the upper part and the lower part, the shapes of the upper part and the lower part may be made different. In this way, the means for differentiating the rigidity of the upper part and the lower part can use a material suitable for saddle formation in common for the upper part and the lower part. The processability and cost of the saddle with a pickup function can be improved.

  It is preferable that the piezoelectric sensor is fixed to the higher one of the upper part and the lower part. By fixing the piezoelectric sensor to a highly rigid part in the saddle body in this way, bending deformation of the piezoelectric sensor can be effectively suppressed as compared with the case of fixing the piezoelectric sensor to a low rigidity part, and the pickup function The detection of the body vibration of the attached saddle can be further effectively suppressed.

  Here, the vertical relationship regarding the “upper surface side”, “upper part”, and “lower part” is such that the outer direction of the body of the stringed instrument is up and the opposite direction is down. “Rigidity” means the difficulty of deformation against bending stress in the chord contact direction (vertical direction).

  As described above, the saddle with a pickup function according to the present invention can output string vibration as an electric signal while suppressing mixing of body vibration. Therefore, the performance sound of the stringed instrument can be electrically output with high quality and can be suitably used for an acoustic guitar or the like.

1 is a schematic cross-sectional view of a saddle with a pickup function according to a first embodiment of the present invention in a direction perpendicular to a string Schematic cross-sectional view perpendicular to the string of the saddle with a pickup function according to the second embodiment of the present invention Schematic sectional view of the vertical direction of the string of the saddle with a pickup function according to the third embodiment of the present invention Typical sectional view (a) perpendicular to the string of the saddle with a pickup function according to the fourth embodiment of the present invention and (b) schematic sectional view parallel to the string The graph which shows the transfer function of the saddle with a pickup function of Example 1 The graph which shows the transfer function of the saddle with a pickup function of the comparative example 1

  Hereinafter, embodiments of a saddle with a pickup function of the present invention will be described in detail with reference to the drawings as appropriate.

<First embodiment>
The saddle 1 with a pickup function shown in FIG. 1 is generally provided on the surface side of the body of a stringed musical instrument via a piece and supports a plurality of strings. The saddle 1 with a pick-up function is an elongated plate-like body, and its longitudinal direction is arranged substantially parallel to the surface of the body part, and its wide flat plate surface is arranged substantially perpendicular to the surface of the body part. The saddle 1 with a pickup function includes a saddle body 2 and a piezoelectric sensor 3 disposed in the saddle body 2. Hereinafter, the structure of the saddle 1 with a pickup function will be specifically described.

  The saddle body 2 has a plurality of string contact positions with which the string X contacts the upper surface. The saddle body 2 includes a substantially rectangular parallelepiped saddle upper portion 2a and a substantially rectangular parallelepiped saddle lower portion 2b located on the lower surface of the saddle upper portion 2a. The saddle body 2 has an internal space portion 5a in which the piezoelectric sensor 3 is housed (between the saddle upper portion 2a and the saddle lower portion 2b), and a lead wire 4 connected to the piezoelectric sensor 3 is connected to the internal space portion 5a. Lead wire insertion hole 5b to be inserted into the lower side of saddle lower portion 2b.

  The saddle upper portion 2a has higher rigidity than the saddle lower portion 2b. That is, the saddle upper portion 2a is less likely to be deformed by bending stress in the string contact direction than the saddle lower portion 2b. This difference in rigidity can be obtained by making the Young's modulus of the material forming the saddle upper portion 2a larger than the Young's modulus of the material forming the saddle lower portion 2b. Here, the ratio of the Young's modulus of the forming material of the saddle upper portion 2a to the Young's modulus of the forming material of the saddle lower portion 2b is preferably 5 times or more. If the ratio of the Young's modulus of the saddle upper portion 2a to the saddle lower portion 2b is less than the above range, a difference in rigidity between the saddle upper portion 2a and the saddle lower portion 2b hardly occurs, and the saddle upper portion 2a and the saddle lower portion 2b are both bent by vibration of the trunk. There is a risk that the piezoelectric sensor 3 may easily detect the trunk vibration.

  The material for forming the saddle upper portion 2a and the saddle lower portion 2b is not particularly limited as long as it has a certain strength and can make the Young's modulus of both different in the above range. For example, a metal or ceramic having a relatively high Young's modulus may be used for the saddle upper portion 2a, and a synthetic resin, ivory, cow bone, or the like having a relatively low Young's modulus may be used for the saddle lower portion 2b. More preferably, brass can be used as the material for forming the saddle upper portion 2a, and urea resin can be used as the material for forming the saddle lower portion 2b. According to such a combination of forming materials, the Young's modulus of the saddle upper portion 2a with respect to the saddle lower portion 2b can be increased to five times or more. In addition, the workability and cost of the saddle 1 with a pickup function can be improved.

  The size of the saddle upper portion 2a is not particularly limited as long as it can support the string of the stringed musical instrument to which the saddle 1 with the pickup function is mounted. For example, when it is mounted on an acoustic guitar having six strings, the length (string The arrangement direction can be 70 mm or more and 90 mm or less, the width (direction parallel to the string) can be 2 mm or more and 4 mm or less, and the height (string contact direction) can be 3 mm or more and 6 mm or less. Further, as the size of the saddle lower portion 2b, the length and width can be the same as those of the saddle upper portion 2a, and the height can be 3 mm or more and 6 mm or less.

  Further, the distance from the string contact surface of the saddle upper portion 2a to the internal space portion 5a can be, for example, 3 mm or more and 6 mm or less, and the size of the internal space portion 5a is, for example, 65 mm or more and 85 mm or less in length. The width can be 2 mm or more and 4 mm or less, and the height can be 0.5 mm or more and 3 mm or less. Furthermore, the diameter of the lead wire insertion hole 5b can be 2 mm or more and 5 mm or less.

  The piezoelectric sensor 3 is disposed in the internal space 5a substantially parallel to the longitudinal direction of the saddle body 2 (substantially parallel to the surface of the body). The piezoelectric sensor 3 is a flat sensor body including one or a plurality of piezoelectric elements. The piezoelectric sensor 3 includes an electrode terminal (not shown) at one end, and a lead wire 4 is connected to the electrode terminal. The vibration of the string X is transmitted as pressure to the piezoelectric element included in the piezoelectric sensor 3 through the saddle upper portion 2a, converted into an electric signal, and output from the lead wire 4 to the outside. The piezoelectric sensor 3 is preferably substantially parallel to the direction in which the plurality of string contact positions of the saddle body 2 are arranged. By arranging the piezoelectric sensor 3 in this way, vibrations from a plurality of strings can be easily received.

  The structure of the piezoelectric sensor 3 is not particularly limited as long as it can be disposed in the saddle body 2. For example, a sensor body in which a piezoelectric element having a piezoelectric film sandwiched between two electrodes is disposed on a substrate, a piezoelectric element, or the like. The sensor body etc. which printed the electrode on both surfaces of the film | membrane film by screen printing etc. can be used. Moreover, the piezoelectric element which the piezoelectric sensor 3 has may be a single thing, and may be divided | segmented into plurality so that it may oppose with each string.

  The piezoelectric sensor 3 is fixed to the lower surface of the saddle upper portion 2a. The method of fixing the piezoelectric sensor 3 to the saddle upper portion 2a is not particularly limited, and for example, a method of bonding with an adhesive can be used.

  The size of the piezoelectric sensor 3 is not particularly limited, and can be, for example, a thickness of 50 μm to 3 mm, a width of 0.5 mm to 3 mm, and a length of 30 mm to 70 mm.

  The material of the piezoelectric film used for the piezoelectric sensor 3 is not particularly limited as long as it generates a voltage by the piezoelectric effect, and examples thereof include various oxides, nitrides, and polymers. Specific examples of the material of the piezoelectric film include single crystals such as lead zirconate titanate (PZT), quartz, lithium niobate, lithium tantalate, lithium tetraborate, potassium niobate, and langasite crystals, zinc oxide, Examples thereof include oriented crystals such as aluminum nitride, polyvinylidene fluoride, etc. Among them, lead zirconate titanate having high piezoelectricity is particularly preferable.

  The material of the electrode used for the piezoelectric sensor 3 is not particularly limited as long as it has electrical conductivity. Examples thereof include platinum, aluminum, nickel, iron, gold, silver, copper, palladium, chromium, and alloys thereof. Can do. Among these, platinum or gold is preferable from the viewpoint of electrical conductivity and chemical stability.

  The connection method of the lead wire 4 to the electrode terminal of the piezoelectric sensor 3 is not particularly limited, and a known method can be used. Specifically, for example, soldering, connection with a crimping fitting, adhesion with a conductive adhesive, wire bonding, and the like can be given.

  The saddle upper portion 2a and the saddle lower portion 2b are fixed by means such as pinning, screwing, or bonding with an adhesive.

  In the saddle 1 with the pickup function, the rigidity of the saddle upper portion 2a is larger than that of the saddle lower portion 2b. In addition, since the difference in Young's modulus between the saddle upper part 2a and the saddle lower part 2b is large, bending due to trunk vibration is likely to occur in the saddle lower part 2b. That is, the body vibration is damped in the saddle lower portion 2b. Further, since the saddle 1 with a pickup function has the piezoelectric sensor 3 fixed to the lower surface of the saddle upper portion 2a, it is difficult to apply pressure due to body vibration to the piezoelectric sensor 3. Thereby, it can suppress that the piezoelectric sensor 3 detects a trunk vibration. As a result, the saddle 1 with a pickup function can output an electric signal obtained by converting the string vibration while suppressing the mixing of the body vibration.

<Second embodiment>
A saddle 11 with a pickup function in FIG. 2 is the same as the saddle 1 with a pickup function in FIG. 1, and includes a saddle body 12 and a piezoelectric sensor 3 disposed in the saddle body 12. Since the piezoelectric sensor 3 and the internal space 5a and the lead wire insertion hole 5b in the saddle body 12 are the same as the saddle 1 with the pickup function, the same numbers are given and the description is omitted.

  The saddle body 12 has the same shape as the saddle body 1 and is composed of a substantially rectangular parallelepiped saddle upper portion 12a and a saddle lower portion. The lower portion of the saddle includes a substantially rectangular parallelepiped first lower portion 12b positioned on the lower surface of the saddle upper portion 12a, and a substantially rectangular parallelepiped second lower portion 12c stacked on the lower surface of the first lower portion 12b.

  The first lower portion 12b has higher rigidity than the saddle upper portion 12a and the second lower portion 12c. Such a rigidity relationship can be obtained, for example, by making the Young's modulus of the material forming the first lower portion 12b higher than the Young's modulus of the material forming the saddle upper portion 12a and the second lower portion 12c. Here, the ratio of the Young's modulus of the forming material of the first lower portion 12b to the Young's modulus of the forming material of the saddle upper portion 12a and the second lower portion 12c is preferably 5 times or more. When the Young's modulus ratio of the first lower portion 12b to the saddle upper portion 12a and the second lower portion 12c is less than the above range, a difference in rigidity between the saddle upper portion 12a and the second lower portion 12c and the first lower portion 12b is unlikely to occur. The saddle upper part 12a, the first lower part 12b, and the second lower part 12c are all bent by the vibration of the cylinder, and the piezoelectric sensor 3 may easily detect the cylinder vibration.

  The forming material of the saddle upper part 12a, the first lower part 12b, and the second lower part 12c is not particularly limited as long as it has a certain strength and can make the Young's modulus different from the above range. For example, a metal or ceramic having a relatively high Young's modulus can be used for the first lower portion 12b, and a synthetic resin, ivory, cow bone or the like having a relatively low Young's modulus can be used for the saddle upper portion 12a and the second lower portion 12c. More preferably, brass can be used as the material for forming the first lower portion 12b, and urea resin can be used as the material for forming the saddle upper portion 12a and the second lower portion 12c. According to such a combination of forming materials, the Young's modulus of the first lower portion 12b with respect to the saddle upper portion 12a and the second lower portion 12c can be made five times or more. In addition, the workability and cost of the saddle 11 with a pickup function can be improved.

  The size of the saddle upper portion 12a can be the same as that of the saddle 1 with a pickup function in FIG. In addition, the size of the first lower portion 12b and the second lower portion 12c can be the same as the length and width of the saddle upper portion 12a, and the height of the first lower portion 12b is not less than 2 mm and not more than 4 mm. The height of 12c can be 2 mm or more and 4 mm or less.

  Further, the distance from the string contact surface of the saddle upper portion 12a to the internal space portion 5a and the size of the internal space portion 5a can be the same as those of the saddle 1 with a pickup function in FIG.

  The piezoelectric sensor 3 is fixed to the upper surface of the first lower portion 12b so as to be substantially parallel to the longitudinal direction of the saddle body 12 (substantially parallel to the surface of the body portion). The piezoelectric sensor 3 is preferably substantially parallel to the direction in which the plurality of string contact positions of the saddle body 12 are arranged. By arranging the piezoelectric sensor 3 in this way, vibrations from a plurality of strings can be easily received.

  According to the saddle 11 with the pickup function, since the rigidity of the first lower part 12b is larger than the rigidity of the saddle upper part 12a and the second lower part 12c, bending deformation due to trunk vibration (bending vibration) is restricted. Further, the difference in Young's modulus between the first lower portion 12b, the saddle upper portion 12a, and the second lower portion 12c is large. Therefore, the bending due to the trunk vibration is mainly absorbed by the second lower portion 12c. As a result, detection of the body vibration of the piezoelectric sensor 3 is suppressed, and the saddle 11 with a pickup function can output an electric signal obtained by converting the string vibration while suppressing mixing of the body vibration.

<Third embodiment>
A saddle 21 with a pickup function in FIG. 3 is the same as the saddle 1 with a pickup function in FIG. 1, and includes a saddle body 22 and a piezoelectric sensor 3 disposed in the saddle body 22. Since the piezoelectric sensor 3 is the same as the saddle 1 with a pickup function, the same number is assigned and the description is omitted.

  The saddle body 22 has a plurality of string abutting positions where the string X abuts on the upper surface, and an internal space portion. The saddle body 22 includes a saddle outer body 22b constituting an outer shell of the saddle, a plate-like support body 22a accommodated in the inner space portion of the saddle outer body 22b, and a filling body 22c filling the inner space portion. Become. The internal space contains the piezoelectric sensor 3 fixed to the support 22a, and the filling body 22c is filled between the saddle outer body 22b, the piezoelectric sensor 3 and the support 22a, and the support 22a and the piezoelectric sensor. 3 is fixed. The saddle outer body 22b has a lead wire insertion hole through which the lead wire 4 connected to the piezoelectric sensor 3 is inserted from the inner space portion to the lower side of the saddle outer body 22b.

  The support body 22a has higher rigidity than the saddle outer body 22b and the filling body 22c, and is less likely to be deformed by bending stress in the string contact direction than the saddle outer body 22b and the filling body 22c. This difference in rigidity can be obtained, for example, by making the Young's modulus of the material forming the support 22a larger than the Young's modulus of the material forming the saddle outer body 22b and the filling body 22c. Here, the ratio of the Young's modulus of the forming material of the support 22a to the Young's modulus of the forming material of the saddle outer body 22b and the filling body 22c is preferably 5 times or more. If the Young's modulus ratio of the support body 22a to the saddle outer body 22b and the filling body 22c is less than the above range, a difference in rigidity between the support body 22a and the saddle outer body 22b and the filling body 22c is less likely to occur. There is a possibility that the support body 22a, the saddle outer body 22b, and the filling body 22c are all bent, and the piezoelectric sensor 3 fixed to the support body 22a can easily detect the body vibration. In this way, by changing the Young's modulus of the forming material of each member, the rigidity of each member can be made different without adjusting the shape of the saddle body 22.

  The material for forming the support 22a is not particularly limited as long as it has a certain strength and the Young's modulus for the material for forming the filler 22c is different from the above range. For example, the material for forming the support 22a is preferably a metal or ceramic having a relatively high Young's modulus, and particularly preferably zirconia. As a material for forming the saddle outer body 22b, it is preferable to use a synthetic resin, ivory, bovine bone or the like having a relatively low Young's modulus, and it is particularly preferable to use a urea resin. Further, as the filler 22c, a synthetic resin can be used, and a urea resin is preferably used.

  The size of the support 22a is not particularly limited as long as the piezoelectric sensor 3 can be disposed. For example, the length is 30 mm to 70 mm, the width is 0.5 mm to 3 mm, and the height is 50 μm to 3 mm. be able to.

  The size of the saddle outer body 22b is not particularly limited as long as it can support the string of the stringed instrument to which the saddle 21 with the pickup function is attached. For example, when attached to an acoustic guitar having 6 strings, the length is 70 mm. The height can be 90 mm or less, the width can be 2 mm or more and 4 mm or less, and the height can be 5 mm or more and 15 mm or less.

  Further, the distance from the string contact surface of the saddle outer body 22b to the internal space and the size of the internal space can be the same as those of the saddle 1 with a pickup function in FIG.

  The piezoelectric sensor 3 is fixed to the upper surface of the support body 22a so as to be substantially parallel to the longitudinal direction of the saddle body 22 (substantially parallel to the surface of the body portion), and is fixed by the filling body 22c. The piezoelectric sensor 3 is preferably substantially parallel to the direction in which the plurality of string contact positions of the saddle body 22 are arranged. By arranging the piezoelectric sensor 3 in this way, vibrations from a plurality of strings can be easily received.

  According to the saddle 21 with the pickup function, the rigidity of the support body 22a to which the piezoelectric sensor 3 is fixed on the upper surface is larger than that of the saddle outer body 22b and the filling body 22c. Since deformation is restricted and the difference in Young's modulus between the support 22a and the saddle outer body 22b and the filling body 22c is large, bending due to body vibration is likely to occur in the saddle outer body 22b and the filling body 22c. Further, the bending of the barrel vibration is absorbed by the saddle outer body 22b and the filling body 22c on the lower surface side of the support body 22a. Therefore, the detection of the body vibration of the piezoelectric sensor 3 is suppressed, and the saddle 21 with a pickup function can output an electric signal obtained by converting the string vibration while suppressing the mixing of the body vibration.

<Fourth embodiment>
A saddle 31 with a pickup function in FIG. 4 is the same as the saddle 1 with a pickup function in FIG. 1, and includes a saddle body 32, a piezoelectric sensor 3 disposed in the saddle body 32, a front surface of the saddle body 32, and And a reinforcing body 36 disposed on the back surface. Since the piezoelectric sensor 3 is the same as the saddle 1 with a pickup function, the same number is assigned and the description is omitted.

  The saddle body 32 has a plurality of string abutting positions where the string X abuts on the upper surface, and an internal space portion 35a. The piezoelectric sensor 3 is fixed to the lower surface of the internal space 35a, and the internal space 35a is filled with synthetic resin.

  The saddle body 32 has a flat plate-like reinforcing body 36 joined to the front and back surfaces of the lower portion 32 b located below the piezoelectric sensor 3. For this reason, the rigidity of the lower part 32b is higher than the upper part 32a located above the piezoelectric sensor 3, and the lower part 32b is unlikely to be deformed by bending stress in the chord contact direction. If the rigidity of the lower portion 32b can be sufficiently increased, the reinforcing body 36 may be disposed only on one side (either the front side or the back side) of the saddle body 32.

  The material of the reinforcing body 36 is not particularly limited as long as it has a certain rigidity, and for example, metal, rigidity, ceramic, or the like can be used. Among these, it is preferable to use stainless steel.

  The size of the reinforcing body 36 is not particularly limited as long as the rigidity of the lower portion 32b can be increased. For example, the length is 70 mm to 90 mm, the thickness is 0.1 mm to 2 mm, and the height is 0.2 mm to 2 mm. It can be.

  The size of the saddle body 32, the distance from the string contact surface of the saddle body 32 to the internal space 35a, and the size of the internal space 35a can be the same as those of the saddle 21 with a pickup function in FIG.

  As the material of the saddle body 32, known materials can be used. For example, ivory, cow bone, synthetic resin, or the like can be used, but urea resin is particularly preferable from the viewpoint of rigidity and cost.

  The piezoelectric sensor 3 is fixed to the lower surface of the internal space portion 35a so as to be substantially parallel to the longitudinal direction of the saddle body 32 (substantially parallel to the surface of the body portion). The piezoelectric sensor 3 is preferably substantially parallel to the direction in which the plurality of string contact positions of the saddle body 32 are arranged. By arranging the piezoelectric sensor 3 in this way, vibrations from a plurality of strings can be easily received.

  As the synthetic resin filling the internal space 35a, for example, urea resin or the like can be used.

  According to the saddle 31 with the pickup function, the rigidity of the saddle lower part 32b is larger than the upper part 32a of the saddle body 32, so that bending deformation due to body vibration (bending vibration) is restricted by the saddle lower part 32b. Therefore, the detection of the body vibration of the piezoelectric sensor 3 is suppressed, and the saddle 31 with a pickup function can output an electric signal obtained by converting the string vibration while suppressing the mixing of the body vibration.

<Other embodiments>
The saddle with a pickup function of the present invention is not limited to the above embodiment. For example, in the above-described embodiment, the piezoelectric sensor is fixed to a member having high rigidity. However, it is possible to obtain the effect of suppressing detection of trunk vibration even if the piezoelectric sensor is fixed to a member having low rigidity.

  In each embodiment, the vertical positional relationship between the high rigidity portion and the low rigidity portion in the saddle can be reversed. For example, in the first embodiment, a configuration in which the rigidity (Young's modulus) of the saddle upper portion 2a is lower than the rigidity (Young's modulus) of the saddle lower portion 2b is also within the intended scope of the present invention. In this case, the saddle lower portion 2b having high rigidity can be blocked so that the body vibration does not propagate to the saddle upper portion 2a side, and vibration due to the body vibration of the piezoelectric sensor 3 can be suppressed. Further, in the fourth embodiment, the reinforcing body 36 may be joined to the upper portion 32a instead of the lower portion 32b, and the rigidity of the upper and lower portions of the piezoelectric sensor may be made different.

  Furthermore, the rigidity of the saddle member is changed by changing the Young's modulus of the material in the first embodiment, the second embodiment, and the third embodiment, and the rigidity of the saddle is changed by the reinforcing material in the fourth embodiment. However, the means for making the members of the saddle different in rigidity in the present invention is not limited to these.

  For example, the rigidity of the member can be made different by providing a difference in the width of the member constituting the saddle with respect to the bending direction. Specifically, in the first embodiment, the saddle upper portion 2a and the saddle lower portion 2b are formed of the same material, and the width of the saddle upper portion 2a (in the direction parallel to the string) is made larger than that of the saddle lower portion 2b. Can be made higher than the lower saddle 2b.

  Further, for example, the rigidity of the member can be made different by giving a difference in the presence or absence of a mechanical element such as adding a rib to the member constituting the saddle or forming a notch. Specifically, in the first embodiment, for example, the saddle upper portion 2a and the saddle lower portion 2b are formed of the same material, and a plurality of vertical ribs are disposed on the front surface or / and the back surface of the saddle upper portion 2a. The rigidity of the upper part 2a can be made higher than that of the saddle lower part 2b. The ribs may be arranged diagonally. Further, when the notch is formed, the saddle upper portion 2a can be made more rigid than the saddle lower portion 2b, for example, by making the front surface and / or the back surface of the saddle upper portion 2a corrugated.

  Furthermore, the rigidity of a member can also be varied by providing a difference in the presence or absence of the additive in the material of the member constituting the saddle or the content of the additive. Specifically, in the first embodiment, the saddle upper portion 2a and the saddle lower portion 2b are formed of the same material, and at this time, the saddle upper portion 2a contains more additive than the saddle lower portion 2b, or is added only to the saddle upper portion 2a. By including the agent, the rigidity of the saddle upper portion 2a can be made higher than that of the saddle lower portion 2b. Examples of the additive added to the material of the member constituting the saddle as described above include, for example, carbon fiber, ceramic (for example, alumina, aluminum nitride, etc.), fluorine-based particles, melamine resin particles, silicon-based particles, talc, kaolin, carbonate Mention may be made of fillers formed of materials such as magnesium, potassium carbonate, titanium oxide, silica, starch and the like.

  Such means for varying the rigidity of the members can be used in combination of a plurality of means.

  EXAMPLES Hereinafter, although an Example demonstrates this invention further in detail, this invention is not limited to these Examples.

[Example 1]
A piezoelectric sensor was disposed between the upper saddle made of brass and the lower saddle made of urea resin, and a lead wire was connected to the piezoelectric sensor to produce a saddle with a pickup function. The size of the upper part of the saddle is 80 mm in length, 3 mm in width and 5 mm in height, and the size in the lower part of the saddle is 80 mm in length, 3 mm in width and 5 mm in height. In addition, the Young's modulus of brass is about 10 × 10 ⁴ MPa, and the Young's modulus of the urea-based resin is about 0.7 to 1.4 × 10 ⁴ MPa.

[Comparative Example 1]
A piezoelectric sensor was disposed between the upper part of the urea resin saddle and the lower part of the urea resin saddle, and a lead wire was connected to the piezoelectric sensor to produce a saddle with a pickup function. The sizes of the upper and lower saddles were the same as in Example 1.

[Evaluation]
The saddle with a pickup function of Example 1 and Comparative Example 1 was hit with a hammer, and a transfer function (relationship between frequency, strength, and phase) was calculated from the hitting force and the impulse response of the piezoelectric sensor. The measurement result of the transfer function of Example 1 is shown in FIG. 1, and the measurement result of the transfer function of Comparative Example 1 is shown in FIG.

  As can be seen from FIGS. 1 and 2, Example 1 is superior to Comparative Example 1 in flatness of frequency characteristics. That is, the first embodiment can suppress the detection of body vibration more than the first comparative example.

  As described above, the saddle with a pickup function according to the present invention can output string vibration as an electric signal while suppressing mixing of body vibration. Therefore, the performance sound of the stringed instrument can be electrically output with high quality and can be suitably used for a stringed instrument such as an acoustic guitar.

1, 11, 21, 31 Saddle with pickup function 2, 12, 22, 32 Saddle body 2a, 12a Saddle upper part 2b Saddle lower part 12b First lower part 12c Second lower part 3 Piezoelectric sensor 4 Lead wire 5a, 35a Internal space part 5b Lead wire insertion hole 22a Support body 22b Saddle outer body 22c Filling body 32a Upper part 32b Lower part 36 Reinforcing body X string

Claims (3)

A saddle with a pickup function that outputs the vibration of a stringed instrument as an electrical signal,
A saddle body having a plurality of string contact positions on the upper surface side;
And a piezoelectric sensor disposed in the saddle body,
Ri rigidity Do different between the upper part and the lower part of the piezoelectric sensor in the saddle body,
A piezoelectric sensor is fixed to the higher rigidity of the upper part and the lower part,
A saddle with a pickup function, wherein the piezoelectric sensor is separated from the lower one of the upper part and the lower part .   The saddle with a pickup function according to claim 1, wherein materials having different Young's moduli are used for the upper portion and the lower portion as means for varying the rigidity of the upper portion and the lower portion.   The saddle with a pickup function according to claim 1, wherein the shapes of the upper part and the lower part are different as means for varying the rigidity of the upper part and the lower part.

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