Patent Publication Number: US-2023158934-A1

Title: Seat

Description:
CROSS REFERENCE TO RELATED APPLICATIONS 
     This application is a Divisional of copending Application No. 16/642,497, filed on Feb. 27, 2020, which is the National Phase under 35 U.S.C. § 371 of International Application No. PCT/JP2018/031759, filed on Aug. 28, 2018, which claims the benefit under 35 U.S.C. § 119(a) to Pat. Application No. 2017-167499, filed in Japan on Aug. 31, 2017, all of which are hereby expressly incorporated by reference into the present application. 
    
    
     BACKGROUND OF THE INVENTION 
     Field of the Invention 
     The present invention relates to a seat including a vibrator. 
     Description of the Related Art 
     Conventionally, there has been proposed an information presentation system in which a vibrator is provided to a seat of a vehicle and such and the vibrator is vibrated to transmit information of some kind to a seated person (e.g., see Patent Document 1). Further, Patent Document 1 discloses an information presentation system that detects a hazardous object around an own vehicle (i.e., obstacles such as other vehicle, a person, a fixed object), and presents to a driver information about a direction of the hazardous object (a direction in which the hazardous object is present or moving) using a plurality of vibrators in accordance with the state of the own vehicle and the hazardous object (such as position and/or speed). 
     Prior Art Document 
     Patent Document 
     Patent Document 1: JP 2011-48566 A 
     SUMMARY OF THE INVENTION 
     Problem to Be Solved by the Invention 
     There is a problem in the aforementioned seat having the vibrator arranged therein that, since the vibration by the vibrator arranged in a predetermined region is propagated to another region, the seated person could mistake the position of the vibration source and thus the presented information may not be recognized correctly. 
     Accordingly, an object of the present invention, as one example, is to provide a seat that can allow a seated person to recognize a position of a vibration source as accurately as possible. 
     Solution to Problem 
     In order to achieve the above-mentioned object, the present invention provides, in a first aspect, a seat having a first region and another region, including a first vibrator arranged in the first region and a propagation suppressor that suppresses vibration of the first vibrator from being propagated to the another region. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG.  1    is a perspective view showing a seat according to Example 1 of the present invention; 
         FIG.  2    is a perspective view showing a vibrator provided to the seat of  FIG.  1   ; 
         FIG.  3    is a perspective view showing a seat according to Example 2 of the present invention; 
         FIG.  4    is a perspective view showing a seat according to Example 3 of the present invention; 
         FIG.  5    is a perspective view showing a vibrator and a vibration absorbing member provided to the seat of  FIG.  4   ; 
         FIG.  6    is an illustration illustrating an effect at the seat of  FIG.  4   ; 
         FIG.  7    is an illustration illustrating an effect at a seat according to a modified example of Example 3 of the present invention; 
         FIG.  8    is a perspective view showing a seat according to Example 4 of the present invention; 
         FIG.  9    is a perspective view showing a vibrator and a vibration absorbing member provided to the seat of  FIG.  8   ; and 
         FIG.  10    is an illustration illustrating an effect at the seat of  FIG.  8   . 
     
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the following, an embodiment of the present invention will be explained. A seat according to an embodiment of the present invention has a first region and another region, and includes a first vibrator arranged in the first region and a propagation suppressor that suppresses the vibration of the first vibrator from being propagated to the another region. Such configuration can allow a seated person to more accurately recognize a position of a vibration source. 
     Further, the propagation suppressor may be a vibration absorbing member provided around the first vibrator. Such configuration can limit the vibration range of the first vibrator to a narrow range, allowing the seated person to more accurately recognize the position of the vibration source. 
     Further, the seat according to the embodiment of the present invention may further include a second vibrator arranged in another region, and the propagation suppressor may be configured to suppress the vibration of the second vibrator from being propagated to the first region. 
     Further, the propagation suppressor may be a vibration absorbing member provided around the second vibrator. Such configuration can limit the vibration range of the second vibrator to a narrow range, allowing the seated person to more accurately recognize the position of the vibration source. 
     Further, the propagation suppressor may be a vibration absorbing member arranged inside the seat at a central portion in a width direction of the seat. According to such configuration, when the first vibrator is arranged on one side in the width direction of the seat and the second vibrator is arranged on the other side, the propagation of unwanted vibration of the first vibrator and unwanted vibration of the second vibrator can be suppressed with a single vibration absorbing member, and thereby, the number of parts of the seat can be reduced. 
     Further, the propagation suppressor may be a dividing groove that divides an inner member of the seat into right and left portions at the central portion in the width direction of the seat. With such configuration, the propagation of unwanted vibration can be suppressed without using a dedicated vibration absorbing member, and thereby, the number of parts of the seat can be reduced. 
     Further, the seat according to the embodiment of the present invention may be configured to be mounted as a seat of a vehicle. 
     EXAMPLES 
     Example 1 
     Referring to  FIGS.  1  and  2   , “seat” according to Example 1 of the present invention will be explained. A seat  1 A shown in  FIG.  1    includes a seating portion  3 , a backrest  4 , two pairs of vibrators  5 L,  5 R,  6 L,  6 R, vibration absorbing members (propagation suppressor)  7 ,  8 , and a controller, and constitutes a driver’s seat of a vehicle. An arrow X shown in  FIG.  1    and in other figures is a front-rear direction of the seat  1 A, an arrow Y is a width direction of the seat  1 A, and an arrow Z is an up-down direction of the seat  1 A. 
     The seating portion  3  is for supporting buttocks and thighs of the seated person, and has a sheet member constituting a surface thereof and a cushioning member (cushion member) provided to an inner side of the sheet member and such. When viewed from a seating surface, the seating portion  3  has a first region E 1  and a second region E 2 . The first region E 1  is a right half of the seating portion  3  (i.e., the right half as viewed by the seated person seated on the seat  1 A). The second region E 2  is a left half of the seating portion  3  (i.e., the left half as viewed by the seated person seated on the seat  1 A). 
     The backrest  4  extends so as to intersect with respect to an upper surface of the seating portion  3 , and includes a sheet member constituting a surface thereof and a cushioning member (cushion member) provided on the inner side of the sheet member and such. The cushioning members of the seating portion  3  and the backrest  4  are made of, for example, urethane foam. When viewed from the seating surface, the backrest  4  has a first region E 3  and a second region E 4 . The first region E 3  is a right half of the backrest  4  (i.e., the right half as viewed from a seated person seated on the seat  1 A). The second region E 4  is a left half of the backrest  4  (i.e., the left half as viewed from the seated person seated on the seat  1 A). 
     The term “seating surface” refers to a surface that is in contact with the seated person when the seated person has sat on the seat, and corresponds to the upper surface of the seating portion  3  and a front surface of the backrest  4 . 
     The vibrator (first vibrator)  5 R is arranged in the first region E 1  inside the cushioning member of the seating portion  3 . The vibrator (second vibrator)  5 L is arranged in the second region E 2  inside the cushioning member of the seating portion  3 . The vibrator (first vibrator)  6 R is arranged in the first region E 3  inside the cushioning member of the backrest  4 . The vibrator (second vibrator)  6 L is arranged in the second region E 4  inside the cushioning member of the backrest  4 . The two pairs of vibrators  5 L,  5 R,  6 L,  6 R are identical in configuration, and as shown in  FIG.  2   , they include a magnetic circuit  520  accommodated in a case  510 . The case  510  has a cylindrical frame  511  which is low in height and which has an opening at one end side closed by a circular first plate wall  513  provided with a plurality of through holes  512  at a central portion, and an opening at the other end side closed by a circular second plate wall  514 . 
     A cylindrical bobbin  515  is provided at a substantially center of the first plate wall  513  so a to stand toward the second plate wall  514  so as to surround the plurality of through holes  512  and, a voice coil  516  is provided on an outer circumference of the bobbin  515 . In this manner, the voice coil  516  is fixed to the first plate wall  513  via the bobbin  515 . Further, the plurality of through holes  512  are provided in a region  513   a  corresponding to an inner side of the voice coil  516  in a plan view viewed from a direction intersecting the first plate wall  513 . The magnetic circuit  520  includes a plate  521  and a magnet  522  which are formed into a ring-like shape, and a disk-shaped yoke  523 . The plate  521  and the magnet  522  are arranged coaxially with respect to the voice coil  516  with a gap. The plate  521 , thus the magnetic circuit  520 , is supported on an inner wall face of the cylindrical frame  511  via a damper  530  in a manner capable of vibrating in a contacting/separating direction D 1  with respect to the first plate wall  513 . 
     When an AC signal is transmitted to the voice coil  516 , the magnetic circuit  520  vibrates in the contacting/separating direction D 1  with respect to the first plate wall  513 . Also, due to the reaction from that vibration applied via the damper  530 , the case  510  is vibrated. 
     Although the vibrator  5 L,  5 R,  6 L,  6 R of this example has a magnetic circuit configuration of an external magnet type, the configuration of the vibrator is not limited thereto, and it may have a magnetic circuit configuration of an inner magnet type, for example. 
     The vibrator  5 L,  5 R,  6 L,  6 R is arranged such that the first plate wall  513  faces the seated person side. Further, in the seating portion  3 , the pair of vibrators  5 L,  5 R is arranged in a line-symmetrical manner with respect to a central axis that passes through a widthwise center of the seating portion  3  and that is parallel to the front-rear direction of the seat  1 A. Similarly, in the backrest  4 , the pair of vibrators  6 L,  6 R is arranged in a line-symmetrical manner with respect to a central axis that passes through a widthwise center of the backrest  4  and that is parallel to a direction from a lower end to an upper end of the backrest  4 . 
     The vibration absorbing member  7  is formed into a quadrangular prism-like shape and is arranged inside the seating portion  3  at the central portion in the width direction of the seating portion  3 . Further, a longitudinal direction of the vibration absorbing member  7  coincides with the front-rear direction of the seat  1 A. That is, the vibration absorbing member  7  is arranged along the central axis that passes through the widthwise center of the seating portion  3  and that is parallel to the front-rear direction of the seat  1 A. That is, the vibration absorbing member  7  is arranged at a boundary portion of the first region E 1  and the second region E 2  of the seating portion  3  and is arranged at an intermediate portion between the pair of the vibrators  5 L,  5 R. The vibration absorbing member  7  is composed of a material in which vibration is not likely to be propagated to the cushioning member inside the seating portion  3 , and in this example, it is composed of urethane foam. Further, in this example, the vibration absorbing member  7  has a dimension in a thickness direction of the seating portion  3  that is comparable to a thickness of the vibrator  5 L,  5 R (i.e., a dimension of the cylindrical frame  511  in the arrow D 1  direction shown in  FIG.  2   ); however, the dimension of the vibration absorbing member  7  in the thickness direction of the seating portion  3  may be changed appropriately, and it may be comparable to the thickness of the seating portion  3 . 
     The vibration absorbing member  7  as described above suppresses the vibration of the vibrator  5 R from being propagated to the second region E 2 , and also suppresses the vibration of the vibrator  5 L from being propagated to the first region E 1 . 
     The vibration absorbing member  8  is formed into a quadrangular prism shape and is arranged inside the backrest  4  at the central portion in the width direction of the backrest  4 . Further, a longitudinal direction of the vibration absorbing member  8  coincides with the direction from a lower end to an upper end of the backrest  4 . That is, the vibration absorbing member  8  is arranged along the central axis that passes through the widthwise center of the backrest  4  and that is parallel to the direction from the lower end to the upper end of the backrest  4 . That is, the vibration absorbing member  8  is arranged at a boundary portion of the first region E 3  and the second region E 4  of the backrest  4 , and is arranged at an intermediate portion between the pair of vibrators  6 L,  6 R. The vibration absorbing member  8  is composed of a material in which vibration is not likely to be propagated to the cushioning member inside the backrest  4 . In this example, the vibration absorbing member  8  is composed of urethane foam. 
     Further, in this example, the vibration absorbing member  8  has a dimension in the thickness direction of the backrest  4  that is comparable to the thickness of the vibrator  6 L,  6 R (the dimension in the arrow D 1  direction of the cylindrical frame  511  shown in  FIG.  2   ); however the dimension of the vibration absorbing member  8  in the thickness direction of the backrest  4  may be changed appropriately and may be comparable to the thickness of the backrest  4 . 
     The vibration absorbing member  8  as described above suppresses the vibration of the vibrator  6 R from being propagated to the second region E 4 , and also suppresses the vibration of the vibrator  6 L from being propagated to the first region E 3 . 
     The controller independently controls the vibration of each of the vibrators  5 L,  5 R,  6 L,  6 R by controlling the current flowing through the vibrators  5 L,  5 R,  6 L,  6 R. The controller performs control such as, when the own vehicle deviates from a lane during traveling, it notifies so by vibrating the vibrators  5 L,  5 R,  6 L,  6 R. 
     According to the seat  1 A having the above-described configuration, the vibration generated by each of the vibrators  5 L,  5 R,  6 L,  6 R is propagated well to the seated person side but is suppressed from being propagated in the width direction of the seat  1 A by the vibration absorbing members  7 ,  8 , allowing the seated person to recognize the position of the vibration source more accurately. That is, whether the vibrating vibrator is the one on the right side or on the left side can be recognized more accurately. Consequently, it is possible to allow the seated person to correctly recognize the information meant by the vibration of each vibrator  5 L,  5 R,  6 L,  6 R. Further, the propagation of unwanted vibration of the vibrators  5 R,  5 L on the right side and the left side (the vibration propagating in the width direction of the seat  1 A) can be suppressed with one vibration absorbing member  7 , and the propagation of unwanted vibration of the vibrators  6 R,  6 L on the right side and the left side can be suppressed with one vibration absorbing member  8 , thus the number of parts of the seat  1 A can be reduced. 
     Example 2 
     Referring to  FIG.  3   , “seat” according to Example 2 of the present invention will be explained. In  FIG.  3   , the same elements as Example 1 are denoted by the same reference signs to omit explanations thereof. 
     A seat  1 B of this example shown in  FIG.  3    includes a seating portion  3 , a backrest  4 , two pairs of vibrators  5 L,  5 R,  6 L,  6 R, a propagation suppressor and a controller, and constitutes a driver’s seat of a vehicle as Example 1. 
     The propagation suppressor is a dividing groove P 1  that divides a cushioning member inside the seating portion  3  into right and left portions at a central portion in a width direction of the seating portion  3 , and a dividing groove P 2  that divides a cushioning member inside the backrest  4  into right and left portions at a central portion in a width direction of the backrest  4 . The dividing grooves P 1 , P 2  are formed at positions corresponding to the vibration absorbing members  7 ,  8  of Example 1. 
     The dividing groove P 1  is formed recessed from an upper surface of the cushioning member of the seating portion  3 , and it is hollow inside the dividing groove P 1 . In this example, a depth of the dividing groove P 1  (i.e., a depth of the seating portion  3  in a thickness direction) is compatible to a thickness of the vibrator  5 L,  5 R (i.e., a dimension of the cylindrical frame  511  in the arrow D 1  direction in  FIG.  2   ); however, the depth of the dividing groove P 1  may be changed appropriately and may be formed throughout the entire region in the thickness direction of the cushioning member of the seating portion  3 . Further, in the present invention, instead of the dividing groove P 1 , a cavity may be formed by hollowing out the central portion in the thickness direction of the cushioning member of the seating portion  3 . 
     The dividing groove P 1  as described above suppresses the vibration of the vibrator  5 R from being propagated to the second region E 2 , and also suppresses the vibration of the vibrator  5 L from being propagated to the first region E 1 . 
     The dividing groove P 2  is formed recessed from a front surface of the cushioning member of the backrest  4 , and it is hollow inside the dividing groove P 2 . In this example, a depth of the dividing groove P 2  (i.e., a depth of the backrest  4  in a thickness direction) is compatible to a thickness of the vibrator  6 L,  6 R (i.e., a dimension of the cylindrical frame  511  in the arrow D 1  direction in  FIG.  2   ); however, the depth of the dividing groove P 2  may be changed appropriately and may be formed throughout the entire region in the thickness direction of the cushioning member of the backrest  4 . Further, in the present invention, instead of the dividing groove P 2 , a cavity may be formed by hollowing out the central portion in the thickness direction of the cushioning member of the backrest  4 . 
     The dividing groove P 2  as described above suppresses the vibration of the vibrator  6 R from being propagated to the second region E 4 , and also suppresses the vibration of the vibrator  6 L from being propagated to the first region E 3 . 
     According to the seat  1 B having the above-described configuration, the vibration generated by each of the vibrators  5 L,  5 R,  6 L,  6 R is propagated well to the seated person side but is suppressed from being propagated in the width direction of the seat  1 B by the dividing grooves P 1 , P 2 , allowing the seated person to recognize the position of the vibration source more accurately. That is, whether the vibrating vibrator is the one on the right side or on the left side can be recognized more accurately. Consequently, it is possible to allow the seated person to correctly recognize the information meant by the vibration of each vibrator  5 L,  5 R,  6 L,  6 R. Further, by forming the dividing grooves P 1 , P 2  to the seating portion  3  and the backrest  4 , the propagation of unwanted vibration of the vibrators  5 R,  5 L,  6 L,  6 R (i.e., the vibration that propagates in the width direction of the seat 1B) can be suppressed without using a dedicated vibration absorbing member as described in Example 1, thus the number of parts of the seat  1 B can be reduced. 
     Example 3 
     Referring to  FIGS.  4  to  6   , “seat” according to Example 3 of the present invention will be explained. In  FIGS.  4  to  6   , the same elements as Examples 1, 2 are denoted by the same reference signs to omit explanations thereof. 
     A seat  1 C of this example shown in  FIG.  4    includes a seating portion  3 , a backrest  4 , two pairs of vibrators  5 L,  5 R,  6 L,  6 R, a vibration absorbing member (propagation suppressor)  9  and a controller, and constitutes a driver’s seat of a vehicle as Example 1. 
     As shown in  FIG.  5   , the vibration absorbing member  9  is formed into an annular shape and is provided around each vibrator  5 L,  5 R,  6 L,  6 R, i.e., to an outer circumferential portion of the cylindrical frame  511 . In  FIG.  5   , only the vibration absorbing member  9  provided around the vibrator  5 L is shown; however, the vibration absorbing members  9  provided around other vibrators  5 R,  6 L,  6 R have the same configuration as the one shown in  FIG.  5   . 
     The vibration absorbing members  9  provided around the vibrators  5 L,  5 R are composed of a material in which vibration is not likely to be propagated to the cushioning member inside the seating portion  3 , and in this example, it is composed of urethane foam. Further, in this example, the vibration absorbing member  9  provided around the vibrator  5 L,  5 R has a dimension in the thickness direction of the seating portion  3  that is compatible to the thickness of the vibrator  5 L,  5 R (i.e., a dimension of the cylindrical frame  511  in the arrow D 1  direction in  FIG.  2   ); however, the dimension of the vibration absorbing member  9  in the thickness direction of the seating portion  3  may be changed appropriately and may be compatible to the thickness of the seating portion  3 . Further, the vibration absorbing member  9  covers an entire region of the outer circumferential face of the cylindrical frame  511  of the vibrator  5 L,  5 R. 
     The vibration absorbing member  9  provided around the vibrator  5 R suppresses the vibration of the vibrator  5 R located inside thereof from being propagated to the second region E 2 . The vibration absorbing member  9  provided around the vibrator  5 L suppresses the vibration of the vibrator  5 L located inside thereof from being propagated to the first region E 1 . 
     The vibration absorbing member  9  provided around the vibrator  6 L,  6 R is composed of a material in which vibration is not likely to be propagated to the cushioning member inside the backrest  4 , and in this example, it is composed of urethane foam. Further, in this example, the vibration absorbing member  9  provided around the vibrator  6 L,  6 R has a dimension in the thickness direction of the backrest  4  that is compatible to the thickness of the vibrator  6 L,  6 R (i.e., a dimension of the cylindrical frame  511  in the arrow D 1  direction in  FIG.  2   ); however, the dimension of the vibration absorbing member  9  in the thickness direction of the backrest  4  may be changed appropriately and may be compatible to the thickness of the backrest  4 . Further, the vibration absorbing member  9  covers an entire region of the outer circumferential face of the cylindrical frame  511  of the vibrator  6 L,  6 R. 
     The vibration absorbing member  9  provided around the vibrator  6 R suppresses the vibration of the vibrator  6 R located inside thereof from being propagated to the second region E 4 . The vibration absorbing member  9  provided around the vibrator  6 L suppresses the vibration of the vibrator  6 L located inside thereof from being propagated to the first region E 3 . 
     According to the seat  1 C having the above-described configuration, the vibration generated by each of the vibrators  5 L,  5 R,  6 L,  6 R is propagated well to the seated person side but is suppressed from being propagated in a radial direction of the vibrators  5 L,  5 R,  6 L,  6 R by the vibration absorbing members  9  as shown in  FIG.  6   , allowing the seated person to recognize the position of the vibration source more accurately. That is, whether the vibrating vibrator is the one on the right side or on the left side can be recognized more accurately. Consequently, it is possible to allow the seated person to correctly recognize the information meant by the vibration of each vibrator  5 L,  5 R,  6 L,  6 R. Further, by providing the vibration absorbing member  9  around each vibrator  5 L,  5 R,  6 L,  6 R, the vibration range of each vibrator  5 L,  5 R,  6 L,  6 R can be limited to a narrow range, thereby allowing the seated person to recognize the position of the vibration source more accurately. In Example 3 described above, the vibration absorbing members  9  are provided around all vibrators  5 L,  5 R,  6 L, 6R; however, the present invention is not limited thereto, and the vibration absorbing member  9  may be provided around one of the pair of vibrators  5 L,  5 R, and the vibration absorbing member  9  may be provided to one of the pair of vibrators  6 L,  6 R. In this case also, an advantageous effect to some extent can be obtained in suppressing the propagation of unwanted vibration. 
     Modified Example of Example 3 
     Referring to  FIG.  7   , “seat” according to a modified example of Example 3 of the present invention will be explained. In  FIG.  7   , the same elements as Example  3  are denoted by the same reference signs to omit explanations thereof. 
     A seat  101 C shown in  FIG.  7    includes a seating portion  3 , a backrest  4 , two pairs of vibrators  5 L,  5 R,  6 L,  6 R, a vibration absorbing member (propagation suppressor)  109  provided around each vibrator  5 L,  5 R,  6 L,  6 R, and a controller, and constitutes a driver’s seat of a vehicle as Example  3 . 
     The vibration absorbing member  109  has the same configuration as the vibration absorbing member  9  of Example 3 except that a dimension of the vibration absorbing member  109  in the thickness direction of the vibrator  5 L,  5 R,  6 L,  6 R is greater than that of the vibration absorbing member  9  of Example 3. 
     The vibration absorbing members  109  provided around the vibrators  5 L,  5 R are formed to have the thickness compatible to the thickness of the seating portion  3 . Cavities S 1 , S 2  are present inside the vibration absorbing members  109  above and below the vibrators  5 L,  5 R. In the present invention, these cavities S 1 , S 2  may be filled with urethane foam and such or may be filled with a cushioning member made of the same material as the seating portion  3 . 
     The vibration absorbing members  109  provided around the vibrators  6 L,  6 R are formed to have the thickness compatible to the thickness of the backrest  4 . Cavities S 3 , S 4  are present inside the vibration absorbing members  109  in front and back of the vibrators  6 L,  6 R. In the present invention, these cavities S 3 , S 4  may be filled with urethane foam and such or may be filled with a cushioning member made of the same material as the backrest  4 . 
     According to the seat  101 C having the above-described configuration, with the vibration absorbing member  109  having the thickness greater than that of the vibration absorbing member  9  of Example 3, propagation of unwanted vibration of the vibrator  5 L,  5 R,  6 L,  6 R (i.e., the vibration propagating in the radial direction of the vibrator  5 L,  5 R,  6 L, 6R) can be suppressed more than the vibration absorbing member  9  of Example 3. 
     Example 4 
     Referring to  FIGS.  8  to  10   , “seat” according to Example 4 of the present invention will be explained. In  FIGS.  8  to  10   , the same elements as Examples 1 to 3 described above are denoted by the same reference signs to omit explanations thereof. 
     A seat  1 D of this example shown in  FIG.  8    includes a seating portion  3 , a backrest  4 , two pairs of vibrators  5 L,  5 R,  6 L,  6 R, a vibration absorbing member (propagation suppressor)  10  provided around each vibrator  5 L,  5 R,  6 L,  6 R, a frame  11  supporting the vibration absorbing member  10 , and a controller, and constitutes a driver’s seat of a vehicle as Example 1. 
     The vibration absorbing member  10  is a damping spring and three vibration absorbing members  10  are provided per each vibrator  5 L,  5 R,  6 L,  6 R. As shown in  FIG.  9   , this vibration absorbing member  10  has one end attached to an outer circumferential portion of a cylindrical frame  511  and the other end attached to the frame  11 . The frame  11  is formed into a cylindrical shape and is arranged at the outer circumference of each vibrator  5 L,  5 R,  6 L,  6 R. The three vibration absorbing members  10  are arranged at an equal interval with each other in a circumferential direction of each vibrator  5 L,  5 R,  6 L,  6 R. In  FIG.  9   , only the vibration absorbing member  10  and the frame  11  provided around the vibrator  5 L are shown; however, the vibration absorbing members  10  and the frames  11  provided around other vibrators  5 R,  6 L,  6 R have the same configuration as those in  FIG.  9   . Herein, the vibration absorbing member  10  is schematically shown in  FIG.  9   . 
     The vibration absorbing member  10  provided around the vibrator  5 R suppresses the vibration of the vibrator  5 R located inside thereof from being propagated to the second region E 2 . The vibration absorbing member  10  provided around the vibrator  5 L suppresses the vibration of the vibrator  5 L located inside thereof from being propagated to the first region E 1 . The vibration absorbing member  10  provided around the vibrator  6 R suppresses the vibration of the vibrator  6 R located inside thereof from being propagated to the second region E 4 . The vibration absorbing member  10  provided around the vibrator  6 L suppresses the vibration of the vibrator  6 L located inside thereof from being propagated to the first region E 3 . 
     According to the seat  1 D having the above-described configuration, the vibration generated by each of the vibrators  5 L,  5 R,  6 L,  6 R is propagated well to the seated person side but is suppressed from being propagated in a radial direction of the vibrators  5 L,  5 R,  6 L,  6 R by the vibration absorbing member  10  as shown in  FIG.  10   , allowing the seated person to recognize the position of the vibration source more accurately. That is, whether the vibrating vibrator is the one on the right side or on the left side can be recognized more accurately. Consequently, it is possible to allow the seated person to correctly recognize the information meant by the vibration of each vibrator  5 L,  5 R,  6 L,  6 R. Further, by providing the vibration absorbing member  10  around each vibrator  5 L,  5 R,  6 L,  6 R, the vibration range of each vibrator  5 L,  5 R,  6 L,  6 R can be limited to a narrow range, thereby allowing the seated person to recognize the position of the vibration source more accurately. 
     The present invention is not limited to Examples 1 to 4 described above, and may include other configurations and the like which can achieve the object of the present invention, and modifications and the like as shown below are also within the present invention. 
     For example, in Examples 1 to 4 described above, the seat  1 A,  1 B,  1 C,  1 D is configured to include two pairs of vibrators  5 L,  5 R,  6 L, 6R; however, the present invention is not limited thereto, and the seat may be configured to include one vibrator arranged in one region and a propagation suppressor for suppressing the vibration of this vibrator from being propagated to the another region. In this case also, it is possible to allow the seated person to recognize the position of the vibration source more accurately. 
     Further, in Examples 1 to 4 described above, the seating portion  3  and the backrest  4  are configured to have the first region and the second region adjacent to each other in the width direction of the seat, respectively; however, the present invention is not limited thereto, and the seating portion may have a first region and a second region adjacent to each other in the front-rear direction, and/or the backrest may have a first region and a second region adjacent to each other in the up-down direction. Furthermore, the seating portion or the backrest may have a plurality of regions arranged in a lattice-like fashion. 
     Further, in Examples 1 to 4 described above, the vibration absorbing member  7 ,  8 , the dividing grooves P 1 , P 2 , the vibration absorbing member  9  and the vibration absorbing member  10  as the propagation suppressor are employed alone; however, in the present invention, these propagation suppressors of several kinds may be employed in combination. For example, the vibration absorbing member  9  may be provided around the vibrator  5 L,  5 R of Example 1, so that the vibration absorbing member  9  and the vibration absorbing member  7  together may suppress the propagation of unwanted vibration (vibration propagated in the widthwise direction of the seat) of the vibrators  5 L,  5 R. Further, the vibration absorbing member  10  and the frame  11  may be provided around the vibrators  5 L,  5 R of Example 2, so that the vibration absorbing member  10  and the dividing groove P 1  together may suppress the propagation of unwanted vibration of the vibrators  5 L,  5 R. 
     Further, in Examples 1 to 4 described above, the vibrator is arranged to both of the seating portion  3  and the backrest  4 ; however, in the present invention, the vibrator may be arranged to only one of the seating portion  3  and the backrest  4 . 
     Further, in Examples 1 to 4 described above, the vibrators  5 L,  5 R,  6 L,  6 R were the same in configuration and size; however, in order to obtain the required vibration strength, the vibrator arranged in the backrest  4  and the vibrator arranged in the seating portion  3  may be different in size, or, when the number of vibrators arranged in the backrest  4  and the seating portion  3  is three or more, then the vibrators in the backrest  4  and the seating portion  3  may be different in size. 
     Further, although Examples 1 to 4 described above illustrate examples in which the seat is configured to be mounted on a vehicle, the seat of the present invention may be a seat other than a seat for a vehicle, such as a seat for a movie theater or a theater. 
     Preferred configurations, methods, etc. for carrying out the present invention are disclosed in the above description; however, the present invention is not limited thereto. That is, although the present invention has been specifically shown and described with respect to particular examples, a person skilled in the art can make various modifications to the examples described above in terms of shape, material, quantity, and other detailed configurations without departing from the scope of the technical philosophy and object of the present invention. Therefore, the description which limits the shape, material, etc. disclosed above is exemplary for ease of understanding of the present invention, and is not intended to limit the present invention, thus the description in with name of a member not including a part or all of the limitations of its shape, material, etc. is intended to be included in the present invention.  
     
       
         
           
               
               
             
               
                 List of Reference Signs 
               
             
            
               
                   1 A,  1 B,  1 C,  1 D,  101 C 
                 seat 
               
               
                   5 R,  6 R 
                 vibrator (first vibrator) 
               
               
                   5 L,  6 L 
                 vibrator (second vibrator) 
               
               
                   7 ,  8 ,  9 ,  10 ,  109   
                 vibration absorbing member (propagation suppressor) 
               
               
                 E 1 , E 3 
 
                 first region 
               
               
                 E 2 , E 4 
 
                 second region 
               
               
                 P 1 , P 2 
 
                 dividing groove (propagation suppressor)