JP5733370B2 - Impact detection device - Google Patents

Description

  The present invention relates to a hit detection device that detects vibration caused by hitting a pad and outputs a detection signal as a signal for generating a musical sound.

  2. Description of the Related Art Conventionally, in an electronic percussion instrument such as an electronic drum, a sensor that detects vibration generated by hitting a hitting surface of a pad with a sensor and generates a tone based on the detection signal is known. In this type of electronic percussion instrument, a hit detection device that obtains and outputs the above detection signal is applied, and the hit detection device is usually configured in a drum-like form with a pad body supported by a support frame in some manner. The

  For example, the musical instrument disclosed in Patent Literature 1 includes a main body in the shape of a shallow dish made of hard rubber, and a base plate made of an iron plate at the bottom of the main body, and the main body and the base plate are formed by the base. It is supported. A pad plate embedded in a pad rubber having a hit surface is supported by the base plate via a donut-shaped cushion material. A pad sensor is fixed to the back surface of the pad plate.

  A rim plate is embedded inside the peripheral part of the main body, and a rim sensor is fixed to the inner periphery of the rim plate. When the performer strikes the pad, the pad plate vibrates and the vibration is detected by the pad sensor. When the performer performs a rim shot, the rim plate vibrates when the performer strikes the rim, and the vibration is detected by the rim sensor.

  Here, the pad plate is not in direct contact with the rim, but is in contact with the pad rubber, and the pad rubber is made of a soft rubber compared to the rubber of the rim, so that the vibration from the rim is attenuated. . Therefore, the vibration of the rim play rod is not transmitted to the pad sensor. Each of the pad sensor and the rim sensor detects vibration as an electric signal, and the electric signal is electrically amplified by an amplifier, a speaker or the like through an electric circuit and is generated as a musical sound.

  In the musical instrument disclosed in Patent Document 2 below, the pad body, the sensor unit, and the sensor support body are supported by the upper case only through the thin film elastic body formed in a disc shape, and are suspended from the upper case. ing.

  That is, the sensor support body on which the sensor unit for detecting the impact is disposed is coupled to the pad body by the bridge body together with the film-like elastic body. The film-like elastic body is formed in a disc shape with a synthetic resin that is elastic and hardly transmits vibration, and a radially outer portion from the thick portion is a thin film portion. The thin film portion is fixed so as to be sandwiched between the stay of the light emitting unit and the upper case. At the time of non-striking, the pad body, the sensor part, the sensor support body and the like are coupled to the upper case only through the thin film part and are suspended from the upper case. This acts independently of the upper case with respect to vibration transmission. That is, the vibration from the case body is substantially blocked by the thin film portion, and the vibration transmission to the sensor portion is effectively suppressed, so that the jump due to the impact of the other pads and the impact of the case body itself is prevented.

JP-A-6-175651 Japanese Patent Laid-Open No. 2002-169546

  In the musical instrument disclosed in Patent Document 1, vibrations from the outside other than the pad body, for example, floor vibrations, vibrations caused by striking other pads or the case body itself may be transmitted to the base. At that time, the vibration in the vertical direction from the outside is absorbed by the cushion material. However, if the vibration is a small vibration with a small displacement, it is not absorbed effectively by the cushion material, but it is detected by a highly sensitive pad sensor, which causes a disturbance in the generation of musical sound (so-called jumping) ).

  Moreover, since the rim restricts the movement of the pad plate, the vibration in the lateral direction cannot be absorbed, and the pad sensor may detect the vibration in the lateral direction, which may cause disturbance. .

  Further, in the musical instrument of Patent Document 2, when vibration is transmitted from the floor or the like to the upper case that is a part of the support frame, the vibration in the vertical direction is absorbed by the thin film portion, but the thin stomach portion is flat. Since it is expanded in the horizontal direction, the vibration in the horizontal direction is difficult to be absorbed. In particular, the sensor unit detects the vibration in the horizontal direction, which may be a disturbance.

  The present invention has been made to solve the above-described problems of the prior art, and an object of the present invention is to provide a hit detection device capable of enhancing the disturbance blocking effect by blocking fine vibration from the support frame. There is to do.

In order to achieve the above object, the hit detection device according to claim 1 of the present invention detects a pad body (10) provided with a hitting surface (11a) to be hit on the front side, and vibration caused by hitting the pad body. and striking the sensor (13) which, based on surface (31a, 32a, 230b, 230d, 430a) and protruding portions with protruding from the elastic from the base surface (33, 34, 35) possess a of the pad body an intervening member which is provided below, the fixing member fixed to said pad body has an extended portion which in the vertical direction is extended form the support frame for supporting the pad body via the intervening member (20 In the non-striking state, the interposition member is such that at least one of the pad body including the fixing member and the support frame is in contact with only the projection with respect to the interposition member. Is Interposed between the body and the support frame, wherein the said base surface of the intermediate member, wherein a protruding portion, the protruding portion of the protruding direction substantially perpendicular to the struck surface of the pad body And a projecting portion in contact with the extended portion of the fixing member is provided so as to project in a projecting direction substantially parallel to the hit surface.

  In addition, the code | symbol in the said parenthesis is an illustration.

  According to the first aspect of the present invention, it is possible to enhance the disturbance blocking effect by blocking the minute vibration from the support frame.

  According to the second aspect of the present invention, good performance can be ensured by allowing the striking force to be firmly received by the support frame.

  According to the third aspect, the performance can be improved by resisting the reaction force changing in a plurality of stages against the increase of the displacement force to the pad body.

  According to the fourth aspect, the performance can be improved by resisting the increase in the displacement force to the pad body with a smooth reaction force increase.

  According to the fifth aspect, it is possible to suppress the detection of minute vibrations in both the direction perpendicular to the hit surface and the parallel direction, and to simplify the configuration of the interposed member.

1 is a schematic longitudinal sectional view (FIG. 1 (a)) around one pad body in an electronic percussion instrument to which a hit detection device according to an embodiment of the present invention is applied; FIG. It is a bottom view (figure (b)). They are the longitudinal cross-sectional view (FIG. (A)) around one adhering member, the perspective view (figure (b)), and top view (figure (c)) of one interposition member. It is a longitudinal cross-sectional view (figure (a), (b)) of the interposition member of a 1st, 2nd modification. It is a longitudinal cross-sectional view (figure (a), (b)) of the interposition member of a 3rd, 4th modification.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1A is a schematic longitudinal sectional view around one pad body in an electronic percussion instrument to which a hit detection device according to an embodiment of the present invention is applied. The electronic percussion instrument is configured as an electronic drum that electronically generates musical sounds. A plurality of frames 20 are supported on a drum rack (not shown), and a pad body 10 is supported on each frame 20. FIG. 1A shows one of the pad bodies 10. For example, the pad body 10 is configured for a snare drum or a tom, but is not limited thereto. Therefore, although the size and shape of the pad body 10 vary depending on the type of the pad body 10, the basic configuration related to the present invention described below is the same.

  FIG. 1B is a bottom view of a portion of the frame 20 that supports one pad body 10. FIG. 1A corresponds to a cross-sectional view taken along the line AA in FIG.

  The pad body 10 includes a circular pad portion 11 and a circular base portion 12 fixed to the back side of the pad portion 11. The upper surface which is the surface on the front side of the pad portion 11 provides a hit surface 11a to be hit. The pad body 10 is not necessarily installed so that the hit surface 11a is horizontal, but hereinafter, the hit surface 11a is assumed to be horizontal, and the up and down direction and the left and right direction are called.

  An impact sensor 13 is disposed on the back side of the base portion 12. The impact sensor 13 includes a piezoelectric element and the like, converts vibrations of the base portion 12 into an electrical signal, and detects the signal as presence / absence and strength of the impact. However, any configuration may be used as long as the impact is detected by vibration, and the configuration and arrangement position are not limited. When the hit surface 11 a is hit, the base portion 12 vibrates and is detected by the hit sensor 13. Based on the detection signal, a drum sound is generated by a musical sound generator (not shown). The tone generator may be a separate body from the hit detection device.

  The frame 20 is made of resin or the like and has a circular bottom portion 21 corresponding to one pad body 10. The annular ribs 23 are formed integrally with the frame 20 at a plurality of locations (for example, 6 locations) around the bottom portion 21. Each annular rib 23 is extended upward, and the plate-like part 22 is integrally formed in each.

  The pad body 10 is provided with fixing members 40 at six locations corresponding to the annular ribs 23. The pad body 10 is supported by the frame 20 via the interposition member 30. An annular rubber washer 44 is fixed to a position corresponding to the inside of the annular rib 23 on the lower surface 22 b of the plate-like portion 22.

  FIG. 2A is a longitudinal sectional view around one fixing member 40. FIGS. 2B and 2C are a perspective view and a plan view, respectively, of one interposed member 30.

  As shown in FIG. 2A, the fixing member 40 is configured by integrally forming an upper flange portion 41 and a cylindrical portion 42, and further fixing a lower flange portion 43 below the cylindrical portion 42. The A mounting hole 40 a is formed over the entire length in the vertical direction over the upper flange portion 41 and the cylindrical portion 42 of the fixing member 40. The lower flange portion 43 has a washer shape, and has a through hole communicating with the mounting hole 40a.

  In the plate-like portion 22, a through hole 22 c is formed at a position corresponding to the inside of the annular rib 23. The cylindrical portion 42 of the fixing member 40 passes through the through hole 22c. The inner diameter of the through hole 22 c is larger than the outer diameter of the cylindrical portion 42.

  With the upper flange portion 41 in contact with the back surface 12 a of the base portion 12, the screw 45 is screwed into the screw hole 12 b of the base portion 12 from below through the lower flange portion 43, whereby the upper flange portion 41. The lower flange portion 43 is fixed to the base portion 12 together with the cylindrical portion 42. Thereby, the fixing member 40 is screwed and fixed to the pad body 10, and becomes a part of the pad body 10 integrally with the pad body 10.

  The fixing member 40 may be fixed in any manner as long as it is fixed to the pad body 10. Alternatively, the fixing member 40 may be formed integrally with the base portion 12. The fixing member 40 is made of a highly rigid material such as metal. In the fixing member 40, not only the upper flange portion 41 and the cylindrical portion 42 but also the lower flange portion 43 may be integrally formed.

  The interposition member 30 functions as an insulator that blocks or suppresses transmission of vibration between the frame 20 and the pad body 10. The interposition member 30 may be of any type as long as it has elasticity. For example, in addition to silicon rubber, butyl rubber, natural rubber, urethane rubber, or the like may be used. In the present embodiment, silicon rubber is used which has the advantage of being less dependent on temperature and less permanent deformation. The interposition member 30 is formed by, for example, mold injection molding.

  As shown in FIGS. 2A to 2C, the interposition member 30 is formed by integrally forming a flange portion 31 and a cylindrical portion 32. Vertical projections 33 (33B, 33S) are integrally formed on the upper surface 31a of the flange 31 so as to project. The vertical protrusions 33B are higher in protrusion than the vertical protrusions 33S, and every four of them are arranged at equal intervals in the circumferential direction of the flange 31. Yes.

  A through hole 32a larger in the vertical direction than the outer diameter of the cylindrical portion 42 of the fixing member 40 is formed in the interposition member 30, and a horizontal protrusion 34 is integrally formed on the inner peripheral surface of the through hole 32a. Yes. As shown in FIG. 2 (c), a total of six horizontal protrusions 34 are arranged at equal intervals along the circumferential direction of the flange 31.

  Each of the vertical protrusions 33B and 33S and the horizontal protrusion 34 of the interposition member 30 has a convex curved surface in which the cross-section of the tip portion is reduced in diameter toward the tip. The upper surface 31a of the flange portion 31 is a horizontal and flat surface, and with this as a base surface, the vertical protrusions 33B and 33S are provided so as to protrude straightly upward with respect to the base surface. On the other hand, the horizontal protrusion 34 protrudes toward the center point of the through hole 32a. Accordingly, when the portion corresponding to the base portion of the horizontal protrusion 34 in the inner peripheral surface of the through hole 32a is considered as the base surface, the portion protrudes in the horizontal direction perpendicular to the base surface.

  A diameter of a circle passing through each tip of the horizontal protrusion 34 along the circumferential direction of the flange 31 is slightly smaller than the outer diameter of the cylindrical portion 42 of the interposed member 30 in a free state. Therefore, when the interposition member 30 is attached to the fixing member 40, each tip of the horizontal projection 34 abuts on the outer peripheral surface 42a of the cylindrical portion 42, and the tip of the horizontal projection 34 is slightly elastically deformed. This also restricts the horizontal position of the pad body 10 in the non-striking state.

  As shown in FIG. 2A, in a state where the interposition member 30 is disposed so as to be interposed between the frame 20 and the pad body 10, the lower surface 31 b of the flange portion 31 of the interposition member 30 is an annular shape of the frame 20. While contacting the upper end surface 23 a of the rib 23, the lower end surface 32 b of the cylindrical portion 32 contacts the upper surface 22 a of the plate-like portion 22. Further, the outer peripheral surface 32 c of the cylindrical portion 32 abuts against the inner peripheral surface 23 b of the annular rib 23.

  Further, a load corresponding to the weight of the pad body 10 is applied to the vertical protrusion 33B in the non-striking state of the pad body 10 which is the initial state. Therefore, the lower surface 41a of the upper flange portion 41 of the fixing member 40 comes into contact with the tip of the vertical projection 33B, and the tip of the vertical projection 33B is in a slightly elastically deformed state. However, since the height of the vertical protrusion 33S is set so that the lower surface 41a does not come into contact with the vertical protrusion 33S in the non-striking state, the vertical protrusion 33S is not elastically deformed. . In this state, the position of the pad body 10 in the non-striking state in the vertical direction is restricted.

  In FIG. 2A, the state of elastic deformation of the vertical protrusions 33B and the horizontal protrusions 34 is not expressed, but the tip is actually crushed. As described above, the frame 20 supports the pad body 10 including the fixing member 40 only through the interposition member 30. In particular, for the fixing member 40, the interposition member 30 includes the vertical protrusions 33B, 33S, It contacts only at the horizontal projection 34.

  By the way, the inner diameter of the rubber washer 44 is substantially the same as the inner diameter of the through hole 22 c of the plate-like portion 22 and is larger than the outer diameter of the cylindrical portion 42 of the interposition member 30. In a non-striking state, a gap is generated between the lower surface 44 a of the rubber washer 44 and the upper surface 43 a of the lower flange portion 43 of the fixing member 40. Accordingly, the fixing member 40 does not engage the rubber washer 44 at all in the non-striking state. On the other hand, when the vertical protrusion 33 is pressed by a hitting performance of the pad body 10 or the like, the pad body 10 including the fixing member 40 may be temporarily lifted by the reaction. In such a case, the upper surface 43 a of the lower flange portion 43 of the fixing member 40 located at the temporarily raised portion of the pad body 10 contacts the lower surface 44 a of the rubber washer 44. As a result, excessive displacement of the pad body 10 in the upward direction is restricted, and the vertical movement of the portion is quickly attenuated.

  When assembling the electronic percussion instrument with the pad body 10 supported by the frame 20, first, a rubber washer 44 is fixed to the lower surface 22 b of the plate-like portion 22 of the frame 20 by bonding or the like. The rubber washer 44 is not necessarily fixed, and may be interposed in a freely movable state. On the other hand, the base portion 12 is fixed to the pad portion 11. Then, with the interposition member 30 fitted into the cylindrical portion 42 of the fixing member 40, the cylindrical portion 42 is inserted from above into the annular rib 23 of the frame 20 and the through hole 22 c of the plate-like portion 22. Further, the six positions of the annular rib 23 and the screw hole 12b of the base portion 12 are aligned, and the lower flange portion 43 is brought into contact with the cylindrical portion 42 from below at each location. And the upper side flange part 41 and the cylindrical part 42, and the lower side flange part 43 are fixed to the base part 12 with the screw | thread 45 in the fastening state.

  In such a configuration, in the non-striking state, as described above, the fixing member 40 that is a part of the pad body 10 is in contact with only the vertical protrusions 33B and the horizontal protrusions 34. That is, with respect to the vertical direction, the pad body 10 is supported by four points per one interposed member 30. In the horizontal direction, 6 points are supported per one interposed member 30. Thus, the vertical and horizontal positions of the pad body 10 in the non-striking state are regulated.

  Even in the non-striking state, vibrations due to floor vibrations and other pad bodies 10 may be transmitted to the frame 20 in some cases. However, since the vertical protrusion 33B and the horizontal protrusion 34 have elasticity, vibration (fine vibration) with small displacement (amplitude) is effectively blocked, and the impact sensor 13 disposed on the pad body 10 detects the vibration. This is avoided.

  In particular, in the horizontal direction, the protruding directions of the six horizontal protrusions 34 in the interposition member 30 are different from each other, so that the anti-vibration effect is uniformly exhibited in all directions. Moreover, since the fine vibration transmitted as disturbance from the outside is more in the horizontal direction, the effect of the horizontal protrusion 34 is great.

  Next, when the pad body 10 is struck, the upper flange portion 41 abuts not only the vertical projection portion 33B but also the vertical projection portion 33S when the striking force is a medium load that can frequently occur during performance. Further, when the striking force is a large load that can occur during performance, not only the vertical protrusion 33B but also the vertical protrusion 33S is crushed by elastic deformation, and the upper flange portion 41 contacts the upper surface 31a of the flange portion 31 of the interposition member 30. Abuts against the surface. As a result, the striking force is firmly received even with a large vertical load. In particular, the performance is good due to the stepwise increase in reaction force caused by the vertical protrusion 33B and the vertical protrusion 33S.

  On the other hand, depending on the mode of striking the pad body 10 and the direction of vibration transmitted from the outside, a large load may be generated even in the horizontal direction. Even in such a case, in the interposed member 30, the horizontal protrusion 34 corresponding to the direction of the load is crushed by elastic deformation, and the outer peripheral surface of the cylindrical portion 42 of the fixing member 40 is connected to the inner peripheral surface of the through hole 32 a of the interposed member 30. 42a contacts. Therefore, the movement of a large horizontal load or large displacement can be firmly received.

  Further, when the pad body 10 is strongly struck, the pad body 10 tends to float immediately after the upper flange portion 41 abuts against the flange portion of the interposition member 30, but the lower flange portion 43 becomes the rubber washer 44. Since it abuts, the upper limit position of the pad body 10 is regulated, and the pad body 10 easily returns to the initial state quickly.

  According to the present embodiment, in a non-striking state, the interposition member 30 is connected to the pad body 10 and the frame 20 so that the pad body 10 contacts only the vertical protrusion 33B and the horizontal protrusion 34 with respect to the interposition member 30. Therefore, the slight vibration from the frame 20 in both the direction perpendicular to the hit surface 11a and the direction parallel to the hit surface 11a can be blocked. As a result, the detection of micro-vibration that causes disturbance can be suppressed, the disturbance blocking effect can be enhanced, accurate detection can be performed, and the generation (jumping) of inappropriate music due to disturbance can be avoided. Can do.

  Moreover, when a heavy load is applied, the vertical protrusion 33 and the horizontal protrusion 34 are crushed, and the fixing member 40 comes into contact with the upper surface 31a of the interposed member 30 and the inner peripheral surface of the through hole 32a, which are the base surfaces. Therefore, even if a large striking force or an unexpected load is applied, they can be firmly received by the frame 20 to ensure good performance.

  Further, since the vertical protrusions 33B and 33S having different projecting heights are provided on the upper surface 31a of the interposition member 30, the characteristics of the reaction force generated varies depending on the magnitude of the applied displacement. Thereby, it is possible to improve the performance by resisting the reaction force changing in a plurality of stages against the increase of the displacement force to the pad body 10. Furthermore, since the interposition member 30 is integrally formed including all of the plurality of vertical protrusions 33 and the horizontal protrusions 34, the configuration of the interposition member 30 can be simplified.

  It should be noted that the number and position of the interposition members 30 per pad body 10 are not questioned, and the number and position of the vertical protrusions 33 and horizontal protrusions 34 per interposition member 30 are also questionable. Absent. However, in order to appropriately perform the vibration isolation in the vertical direction, it is desirable to provide the interposition member 30 at at least three locations separated in the circumferential direction of the pad body 10. Further, in order to appropriately perform vibration isolation in all directions with respect to the horizontal direction, among the plurality of horizontal protrusions 34 of all the interposition members 30, there are those that face at least three different directions in the horizontal direction. It is desirable to constitute the interposition member 30.

  In addition, as long as the protrusions 33 and 34 appropriately perform the function as an insulator, it is only necessary that the cross-sectional area of at least the tip portion thereof is formed so as to decrease toward the tip. However, even if the area is almost constant from the base to the tip, a certain effect can be obtained. Further, if the degree of compression of the protrusions 33 and 34 increases as the impact force increases, the above function is sufficiently fulfilled if the contact area is increased by elastic deformation.

  In addition, the protrusions 33 and 34 are not necessarily formed integrally with the flange portion 31 to the cylindrical portion 32 in the interposition member 30, and may be formed separately and fixed. Accordingly, it is only necessary that at least the protrusions 33 and 34 of the interposed member 30 have elasticity.

  Speaking only to prevent vibration in the vertical direction, instead of providing the horizontal protrusion 34, the outer diameter of the cylindrical portion 42 and the inner diameter of the through hole 32a of the interposition member 30 are made substantially equal. You may comprise so that 42a and the internal peripheral surface of the through-hole 32a may contact | abut.

  In addition, about the structure of the interposition member 30, various modifications can be considered. 3 (a), 3 (b), 4 (a), and 4 (b) are longitudinal sectional views of interposition members of first to fourth modified examples. Both indicate a non-hitting state. 3 (a), 3 (b), and 4 (a), only one side across the axis center of the interposed member is shown.

  In the example of FIGS. 1 and 2, two types of projecting heights are provided for the vertical protrusion 33, but this may be applied to the horizontal protrusion 34 as shown in FIG. 3A. That is, horizontal protrusions 34B and 34S having different projecting heights are formed on the inner peripheral surface of the through hole 32a of the interposition member 130 of the first modification. Regarding the height, the horizontal protrusions 34B and 34S correspond to the vertical protrusions 33B and 33S. Therefore, in the non-hitting state and not receiving any external force from the outside, the outer peripheral surface 42a of the cylindrical portion 42 is in contact with only the horizontal protrusion 34B, but an external force greater than the middle load in the horizontal direction is used as the displacement force. When applied to the pad body 10, the outer peripheral surface 42a also contacts the horizontal protrusion 34S.

  The number of steps of the projecting height is not limited to two. Each of the vertical protrusions 33 and the horizontal protrusions 34 may have three or more stages.

  By the way, in the example of FIGS. 1 and 2, the vertical protrusion 33 and the horizontal protrusion 34 of the interposition member 30 are in contact with the fixing member 40 which is a fixed part of the pad body 10. However, if the interposition member 30 is interposed between the pad body 10 and the frame 20 so as to be in contact with at least one of the pad body 10 or the frame 20 only by the vertical protrusion 33 and the horizontal protrusion 34. Good.

  For example, as shown in FIG. 3B, the interposition member 230 according to the second modification is provided so that the vertical protrusion 33 protrudes downward not on the upper surface but on the lower surface 230 b of the interposition member 230. The upper surface 230 a of the interposition member 230 is in contact with the upper flange portion 41 of the fixing member 40. Furthermore, a plurality of horizontal protrusions 34 are provided in the circumferential direction on the outer peripheral surface 230d, not on the inner peripheral surface 230c of the through hole of the fixing member 40. The inner peripheral surface 230 c is in contact with the outer peripheral surface 42 a of the cylindrical portion 42.

  The horizontal protrusion 34 abuts on the inner peripheral surface 23 b of the annular rib 23, and the vertical protrusion 33 abuts on the upper surface 22 a of the plate-like part 22.

  Even in such a configuration, the same anti-vibration effect as in the examples of FIGS. 1 and 2 is exhibited. The interposition member 230 may be configured such that the vertical protrusions 33 are provided on both the upper side and the lower side, and the upper / lower vertical protrusions 33 are in contact with both the pad body 10 and the frame 20. Similarly, the horizontal protrusions 34 may be provided on both the inner peripheral surface 230c and the outer peripheral surface 230d, and the inner / outer horizontal protrusions 34 may be in contact with both the pad body 10 and the frame 20. .

  Further, instead of providing a plurality of types of vertical protrusions 33 having different heights, the reaction force increase may be increased steplessly with one type of vertical protrusion 33. For example, as shown in the interposing member 330 of the third modified example in FIG. 4A, the vertical protrusion 33 is formed in a flared shape, and the cross-sectional area in the cross section perpendicular to the protruding direction is the vertical protrusion 33. It is formed so as to become smaller as it goes to the tip. The same applies to the horizontal protrusion 34. As a result, the performance can be improved by resisting an increase in the displacement force to the pad body 10 with a smooth reaction force increase. In addition, a cross-sectional area should just become small, so that it goes to a front-end | tip, and cross-sectional shape is not ask | required.

  In the example of FIGS. 1 and 2, the vertical protrusion 33 and the horizontal protrusion 34 are provided so as to divide the charge of vibration suppression into the vertical direction and the horizontal direction. However, the projecting direction of the protrusion is not limited to those illustrated.

  For example, in the intervening member 430 of the fourth modified example shown in FIG. 4B, an inclined surface 430a that is reduced in diameter toward the lower side is formed. With the inclined surface 430a as a base surface, a protrusion 35 is projected in a direction perpendicular to the base surface. The protrusions 35 are provided at a plurality of locations (for example, 8 locations) along the circumferential direction of the inclined surface 430a, and the projecting directions differ depending on the angle of the base surface at the projecting locations.

  On the other hand, in the fixing member 140 corresponding to the fixing member 40, an opposing surface 140a that is an inclined surface facing the inclined surface 430a is formed. In the non-striking state, the opposing surface 140 a is in contact with the tip of the protrusion 35 due to the weight of the pad body 10.

  In such a configuration, when the pad body 10 is hit and receives a downward load, the opposing surface 140a presses the protrusion 35 downward, and if it is a large load, the protrusion 35 is crushed downward. Thus, the facing surface 140a contacts the inclined surface 430a. Further, when the pad body 10 receives a load in the horizontal direction, the facing surface 140a presses the protruding portion 35 in the horizontal direction, and if it is a large load, the protruding portion 35 is crushed in the horizontal direction to face. The surface 140a contacts the inclined surface 430a.

  In this way, the inclined surface 430a plays a role corresponding to the upper surface 31a of the interposition member 30 and the inner peripheral surface of the through hole 32a in the examples of FIGS. 1 and 2, and the protrusion 35 is the vertical protrusion 33 and the horizontal protrusion. It plays a role corresponding to both of the parts 34. And the anti-vibration effect of the fine vibration is exhibited in both the direction perpendicular to the hit surface 11a and the parallel direction. In the example of FIG. 4B, two or more types of protrusions 35 having different protrusion heights may be provided.

  In addition, the inclined surface 430a is a base surface that faces obliquely upward, but conversely, it may be a base surface that faces obliquely downward, and the protruding portion 35 may project in a direction perpendicular to the base surface. In that case, a surface facing the base surface is provided on the frame 20. That is, by applying the configuration shown in FIG. 3B, similarly to the vertical projecting portion 33, the projecting portion 35 is projected in the direction of the frame 20 instead of the fixing member 40, and the projecting portion 35 is formed on the opposing surface. The structure which a front-end | tip contacts may be sufficient.

  As described in the above-described various modifications, in order to receive a large load (vibration with a large displacement) due to striking or the like and ensure good performance, it is possible to block fine vibrations in the vertical and horizontal directions. To do this, you can do the following:

  First, with respect to the vertical direction, the intervening member 30 is provided with a portion having a component parallel to the hit surface 11a as a “base surface”, and the base surface is perpendicular to the hit surface 11a. Protrusions having the following components are provided. And the position of the pad body 10 in the direction perpendicular to the hit surface 11a in the non-striking state is regulated by this protrusion.

  Further, regarding the horizontal direction, in one or more intervening members 30 corresponding to one pad body 10, a plurality of portions having components in a direction perpendicular to the hit surface 11a and in directions different from each other. In addition to being provided as “base surfaces”, a plurality of protrusions having components parallel to the hit surface 11a and having components in different directions are provided on these base surfaces. And the position of the pad body 10 in a direction parallel to the hit surface 11a in the non-hit state is regulated by the plurality of protrusions.

  In these cases, the above-mentioned two “base surfaces” may correspond to the same surface, and in that case, a component parallel to the protrusion having a component in a direction perpendicular to the hit surface 11a. The same protrusion may correspond to the provided protrusion. Further, the projecting direction of the protruding portion is not necessarily perpendicular to the base surface. Furthermore, the base surface on which the protrusion is provided is not limited to a flat surface.

  In the above-described embodiment and modification, the protrusions 33, 34, and 35 do not need to be in direct contact with the pad body 10 and the frame 20, and are configured to be in indirect contact with inclusions. May be. In that case, the inclusion does not necessarily need to be fixed to the pad body 10 or the frame 20.

DESCRIPTION OF SYMBOLS 10 Pad body, 11a Impact surface, 13 Impact sensor, 20 Frame (support frame), 30, 130, 230, 330, 430 Interposition member, 31a Upper surface (base surface, parallel component part), 32a Through-hole (base surface) 33 Vertical projection (projection), 34 Horizontal projection (projection), 35 Projection, 40, 140 Fixing member, 230b Bottom surface (base surface, parallel component portion), 230d Outer peripheral surface (base surface), 430a Slope (Base surface, parallel component part, slope part)

Claims (5)

A pad body provided with a hitting surface to be hit on the front side;
An impact sensor for detecting vibration caused by impact on the pad body;
An intervening member possess a protrusion with a resilient projecting from the base surface and the substrate surface is provided below the pad body,
A fixing member having an extending portion extending in the vertical direction and fixed to the pad body;
A support frame that supports the pad body via the interposition member;
In the non-striking state, the interposition member is in contact with the pad body and the pad body so that at least one of the pad body including the fixing member and the support frame is in contact with only the protrusion with respect to the interposition member. Between the support frame and
On the base surface of the interposition member, as the protrusion , a protrusion having a protruding direction in a direction substantially perpendicular to the hit surface of the pad body is substantially parallel to the hit surface. A striking detection device, wherein a projecting direction is set as a projecting direction, and a projecting portion in contact with the extending portion of the fixing member is projected. Wherein the said base surface of the intermediate member, wherein the includes parallel portions fraction substantially parallel to the striking surface,
When the struck surface is hit, the flat ascending portion and the projecting portion projecting from the content, being crushed by the at least one of said pad body and said support frame, said said flat ascending portion component at least one The hit detection device according to claim 1, wherein the hit detection device is configured to be able to abut against each other.   The base surface of the interposition member is provided with a plurality of protrusions having the same protruding direction and different protruding heights, and at least one of the pad body and the support frame is in a non-hitting state, While contacting only the highest protrusion among the plurality of protrusions, the pad body is configured to contact a protrusion lower than the highest protrusion when the pad body receives a displacement force. The hit detection device according to claim 1 or 2.   The hit detection device according to any one of claims 1 to 3, wherein the protrusion has a cross-sectional area in a cross section perpendicular to the protruding direction of the protrusion that decreases toward the tip. . The said protrusion protruding from the one of the interposed member, the projecting direction of the substantially parallel collision raised portion with respect to the striking face, substantially perpendicular collision raised portion relative to the struck surface The hit detection device according to claim 1, wherein the interposition member is integrally formed including all of the protrusions.

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