JP2019043293A - Vehicle seat - Google Patents

Abstract

To provide a vehicle seat which can inhibit friction sounds between a pressure receiving member and a pad as much as possible.SOLUTION: A vehicle seat 11 includes: a pad 25 having a first surface forming a shape of a pressure receiving surface which receives a body of an occupant and a second surface which is a back side of the first surface and forms multiple protruding pieces 43; and pressure receiving members 22, each of which supports the pad 25 from the second surface and at least partially enters into a recessed part defined between the protruding pieces 43.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a vehicle seat mounted on a vehicle such as an automobile.

  Patent Document 1 discloses a vehicle seat. The vehicle seat includes a seat frame that supports the pad. A plurality of S springs are attached to the seat frame as pressure receiving members. The S spring has a zigzag shape and extends in the front-rear direction. The pad is overlaid on the S spring. In the vehicle seat, a good sitting comfort is established based on the flexibility of the pad and the elastic force of the S spring.

International Publication No. 2015/156218

  When the occupant is seated, the pad sinks toward the floor according to the weight of the occupant. When the occupant changes the posture, a relative displacement occurs between the pad and the S spring. The S spring rubs on the back of the pad. A rubbing sound is generated based on the positional deviation between the pad and the S spring.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a vehicle seat that can suppress frictional noise between a pressure receiving member and a pad as much as possible.

  According to the first aspect of the present invention, a pad having a first surface that represents the shape of a pressure-receiving surface that receives the body of an occupant, and a second surface that forms a plurality of convex pieces on the back side of the first surface. And a pressure receiving member that supports the pad from the second surface and at least partially enters a concave portion defined between the convex pieces.

  According to the second aspect, in addition to the configuration of the first side, the pressure receiving member has a spring body that at least partially enters the recess.

  According to the third aspect, in addition to the configuration of the second side surface, the convex piece is an aggregate of long first convex pieces extending parallel to each other in the first direction along the second surface. A first convex piece group, and a second convex piece group that is an assembly of long second convex pieces extending in parallel with each other in a second direction intersecting the first direction along the second surface, The spring body includes a first region that enters at least a first concave portion defined between the first convex pieces, and a second region that enters at least a second concave portion defined between the second convex pieces. .

  According to the fourth aspect, in addition to the structure of any one of the first to third aspects, the pressure receiving member includes a resin member that is fixed to the plurality of spring bodies and at least partially enters the recess.

  According to the fifth aspect, in addition to the configuration of the fourth side surface, the resin member is formed in a plate shape, and a convex portion that at least partially enters the concave portion is formed on the plate surface.

  According to the sixth aspect, in addition to the configuration of any one of the first to fifth side surfaces, the pressure receiving member includes a pan frame that is formed in a plate shape and has a convex portion that at least partially enters the concave portion.

  According to the seventh aspect, in addition to the configuration of the sixth side, the pan frame is formed with a recess for receiving the protruding piece of the pad.

  According to the eighth aspect, in addition to the configuration of any one of the first to seventh side surfaces, the pad is superimposed on the first body that is shaped like the pressure receiving surface on the surface and the back side of the first body. And a second body that partitions the convex piece.

  According to the ninth aspect, in addition to the configuration of any one of the first to seventh side surfaces, the vehicle seat includes an intermediate member that is disposed between the pad and the pressure-receiving member and partitions the convex piece. .

  According to the tenth aspect, in addition to the configuration of any one of the first to ninth side faces, the convex piece protrudes below the pressure receiving member.

  According to the first aspect, the pressure receiving member prevents the pad from shifting. The rubbing sound due to the displacement between the pressure receiving member and the pad is suppressed.

  According to the second aspect, the spring body thus prevents the pad from shifting.

  According to the third aspect, the degree of engagement between the spring body and the pad is improved, and the effect of preventing deviation is enhanced. In addition, the displacement of the pad can be prevented in each of the first direction and the second direction.

  According to the fourth aspect, since the resin member of the pressure receiving member enters the recess, the resin member can be used to prevent the pad from shifting.

  According to the fifth aspect, since the resin member is formed in a plate shape, the displacement of the pad can be effectively prevented over a wide range.

  According to the sixth aspect, the pan frame is formed with the convex portion that enters the concave portion, so that the pan frame can be effectively used for preventing the pad from shifting.

  According to the seventh aspect, since the concave portion for the convex piece is formed in the pan frame, the displacement of the pad can be more effectively prevented.

  According to the eighth aspect, since the convex piece is formed in the second body which is a separate body of the first body, the convex piece can be retrofitted to the first body having a specific shape. The complication of the pad shape is avoided as much as possible. The pad manufacturing is efficient.

  According to the ninth aspect, since the convex piece is partitioned by the intermediate member separate from the pad, the range of selection of the material of the convex piece is widened. In addition, since the pad itself is not specially crafted, good sitting comfort can be maintained.

  According to the tenth aspect, pad displacement can be more effectively prevented.

1 is a perspective view schematically showing an overall configuration of a vehicle seat according to an embodiment of the present invention. It is a perspective view showing roughly the structure of a seat frame. It is a perspective view showing roughly the composition of a seat cushion pad and a seat back pad. It is an enlarged plan view of a seat cushion schematically showing a blower unit and a blower path observed from the back side of the seat cushion. FIG. 5 is a vertical sectional view of the seat cushion taken along line 5-5 in FIG. 4. It is an enlarged view of the wedge-shaped convex piece formed in the back surface of a sound absorption pad. FIG. 7 is a vertical sectional view of the seat cushion taken along line 7-7 in FIG. 5. It is an enlarged plan view which shows roughly the relationship between S spring and the direction of a convex piece. It is an enlarged plan view which shows one specific example of a coupling body roughly. It is a perspective view of a seat frame showing roughly a specific example of a pan frame. It is an enlarged vertical sectional view schematically showing the configuration of the intermediate member.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. In the following description, front and rear, left and right, and top and bottom refer to directions viewed from a passenger seated on a vehicle seat.

  FIG. 1 schematically shows the overall configuration of a vehicle seat according to an embodiment of the present invention. The vehicle seat 11 is, for example, a base 12 installed on the floor of the vehicle, a seat cushion 13 that is supported on the base 12 so as to be movable in the front-rear direction, and receives the occupant's buttocks and thighs, and swings on the seat cushion 13. The seat back 14 is connected to the back of the occupant so as to be swingable back and forth around the axis SX, and the headrest 15 is supported by the upper end of the seat back 14 and receives the head of the occupant. The seat cushion 13, the seat back 14, and the headrest 15 have skin materials 13a, 14a, and 15a that individually enclose the internal pads. The skin materials 14a and 15a adhere to the outer surface of the pad following the depression of the pad by the function of the hanging thread 16. Details of the pad will be described later.

  As shown in FIG. 2, the vehicle seat 11 includes a seat frame 17 that supports the pad. The seat frame 17 includes a seat cushion frame 18 that supports a pad of the seat cushion 13, and a seat back frame 19 that is coupled to the seat cushion frame 18 so as to be swingable about the swing axis SX. The base 12 includes left and right rails 21 that support the seat cushion frame 18 so as to be slidable in the front-rear direction. The longitudinal movement of the seat cushion frame 18 is guided by the rail 21.

  The seat cushion frame 18 connects the side frames 18 a extending in parallel with the individual rails 21, the pan frame 18 b connecting the side frames 18 a at the front end of the seat cushion 13, and the side frames 18 a at the rear end of the seat cushion 13. Connecting pipe 18c. The pan frame 18b is formed in a plate shape and extends between the side frames 18a over a wide range. A plurality of S springs 22 are disposed between the pan frame 18b and the connecting pipe 18c. Each S spring 22 has a zigzag shape and extends back and forth. The zigzag shape is formed by alternately combining the wire 22a extending in the front-rear direction and the wire 22b extending in the left-right direction.

  Four connecting bodies 23 a and 23 b are attached to the S spring 22. The two connecting bodies 23 a spread in the left-right direction and connect the wire rods 22 a with the four S springs 22. The two connecting bodies 23b spread from side to side and connect the wires 22a to each other by two S springs 22 adjacent at the center. The connecting bodies 23b are arranged between the connecting bodies 23a in the front-rear direction. The coupling bodies 23a and 23b are molded from a resin material, for example.

  The seat back frame 19 includes a sheet metal frame 19a coupled to the inside of each side frame 18a by a swing axis SX, and an upper frame 19b that connects the upper ends of the sheet metal frames 19a to each other. A tube member 24 that supports the slide bar of the headrest 15 is fixed to the upper frame 19b so as to be slidable in the vertical direction.

As shown in FIG. 3, the seat cushion 13 is further provided with a seat cushion pad 25 supported by the seat cushion frame 18 and wrapped in the skin material 13 a. The seat cushion pad 25 includes a pad main body 25a having a surface defining the ventilation path 26,
A surface layer pad 25 b that covers the surface of the pad main body 25 a to close the ventilation path 26 and defines a vent hole 27 that communicates with the ventilation path 26 is provided. When air is sent into the ventilation path 26, the air in the ventilation path 26 blows upward from the vent hole 27. The air passes through the breathable skin material 13a and cools the lower half of the occupant. The seat cushion pad 25 is made of a material having elasticity such as urethane foam.

  The seat back 14 is further provided with a seat back pad 31 supported by the seat back frame 19 and wrapped in the skin material 14a. The seat back pad 31 includes a pad main body 31 a having a surface that defines a ventilation path 32, and a surface layer pad 31 b that covers the surface of the pad main body 31 a to close the ventilation path 32 and that defines a ventilation hole 33 that communicates with the ventilation path 32. Prepare. When air is sent into the ventilation path 32, the air in the ventilation path 32 blows forward from the vent hole 33. Air permeates the breathable skin material 14a and cools the back of the passenger. The seat back pad 31 is formed of a material having elasticity such as urethane foam.

  As shown in FIG. 2, the blower unit 34 is disposed in the space below the seat cushion 13. Referring also to FIG. 4, the blower unit 34 is disposed in a space on the back side of the pan frame 18 b (below the pan frame 18 b), and is housed in the fan housing 35 that partitions the blower opening 35 a. A centrifugal blade 36 that rotates about a rotation axis 36 a that extends vertically and a power source 37 that is incorporated in the fan housing 35 and causes the rotation of the centrifugal blade 36, that is, an electric motor, are provided. A duct 38 is connected to the fan housing 35. The duct 38 extends backward from the common duct 38a connected to the air outlet 35a of the fan housing 35 and the common duct 38a, bypasses the connection pipe 18c of the seat cushion frame 18, and the ventilation path from behind the seat back pad 31. 32 and a second individual duct 38c extending upward from the common duct 38a and connected to the ventilation path 26 of the seat cushion pad 25 from below. When the power source 37 is activated, an air flow is blown out from the air blowing port 35a in accordance with the rotation of the centrifugal blade 36. The airflow is supplied to the ventilation path 32 of the seat back pad 31 through the common duct 38a and the first individual duct 38b, and blows forward from the vent hole 33. Similarly, the airflow is supplied to the ventilation path 26 of the seat cushion pad 25 through the second individual duct 38 c branched from the first individual duct 38 b and blows upward from the vent hole 27.

  As shown in FIG. 5, the seat cushion pad 25 has a surface (first surface) that is shaped like a pressure-receiving surface that receives the occupant's body. The skin material 13 a adheres to the surface of the seat cushion pad 25. The seat cushion pad 25 further includes a sound absorbing pad 41 embedded in the back side of the pad main body 25a and having higher sound absorbing performance than the pad main body 25a and the surface layer pad 25b. The sound absorbing pad 41 is accommodated in a recess 42 which is partitioned on the back surface (second surface) of the pad body 25a and is recessed from the reference surface PL on the back surface. In securing sound absorbing performance, the sound absorbing pad 41 is more flexible than the pad main body 25a and the surface layer pad 25b. The sound absorbing pad 41 is formed of, for example, a foamed urethane sound absorbing material.

  The sound absorbing pad 41 has a plurality of chevron projections on the first surface 41a in contact with the pad main body 25a, and a plurality of wedge-shaped convex pieces 43 on the second surface 41b on the opposite side (back side) of the first surface 41a. . As shown in FIG. 6, the convex piece 43 is formed of a wedge-shaped convex piece adjacent to each other with a groove interposed therebetween. The convex piece 43 includes a first convex piece group 44a, which is an assembly of long convex pieces 43 extending in parallel with each other in the first direction DRF along the second surface 41b, and a first along the second surface 41b. And a second convex piece group 44b that is an assembly of long convex pieces 43 extending in parallel with each other in the second direction DRS intersecting the direction DRF. Here, the second direction DRS is orthogonal to the first direction DRF. The first convex piece group 44a and the second convex piece group 44b are partitioned into squares and arranged in a lattice shape. The contact surface between the pad main body 25a and the sound absorbing pad 41 is formed in an uneven shape that is in close contact with each other. The pad body 25a and the sound absorbing pad 41 may be bonded with an adhesive. In addition, the convex piece 43 may be directly formed on the back surface of the pad main body 25a.

  As shown in FIGS. 5 and 7, the seat cushion pad 25 is supported by a pan frame (pressure receiving member) 18 b and an S spring (pressure receiving member) 22 disposed in the space on the back side of the seat cushion pad 25. The S spring 22 at least partially enters a recess defined between the projecting pieces 43. The blower unit 34 is disposed in the space on the back side of the seat cushion pad 25 and faces the convex piece 43. Here, the blower unit 34 is opposed to the back surface of the pan frame 18 b that contacts the tip of the convex piece 43. The protruding piece 43 protrudes below the S spring 22. As shown in FIG. 8, the S spring 22 includes at least a first region 46a that enters at least a first recess 45a defined between the projecting pieces 43 of the first projecting piece group 44a, and a projecting part of the second projecting piece group 44b. A second region 46b that enters at least the second recess 45b defined between the pieces 43. The S spring 22 partially intersects the convex piece 43. The S spring 22 can bite into the convex piece 43 when crossing the convex piece 43.

  When a power source 37 such as an electric motor is operated, an operation sound is generated. When the centrifugal blade 36 rotates based on the operation of the power source 37, wind noise is generated according to the rotation of the centrifugal blade 36. Noise such as operation sound of the power source 37 and wind noise is absorbed by the sound absorbing pad 41. Thus, even if the sound source is arranged in the space behind the seat cushion pad 25, the sound toward the seat cushion pad 25 is efficiently absorbed by the sound absorbing pad 41. The sound reaching the occupant is suppressed. The vehicle seat 11 greatly contributes to noise reduction in the vehicle. The flexibility gives the sound absorbing pad 41 good sound absorbing performance. The power source 37 may include an actuator, a motor, or a blower, for example. The actuator, motor or blower may be operated based on electric power, for example.

  In the present embodiment, the seat cushion pad 25 has a first surface that represents the shape of a pressure receiving surface that receives the occupant's body, and a second surface that forms the plurality of convex pieces 43 on the back side of the first surface. . The S spring 22 supports the seat cushion pad 25 from the second surface, and at least partially enters the first concave portion 45a and the second concave portion 45b defined between the convex pieces 43. The S spring 22 prevents the seat cushion pad 25 from shifting. The rubbing sound based on the deviation between the S spring 22 and the seat cushion pad 25 is suppressed. In particular, the S spring 22 is between the first region 46a that enters at least the first concave portion 45a defined between the convex pieces 43 belonging to the first convex piece group 44a and the convex pieces 43 that belong to the second convex piece group 44b. And a second region 46b that enters at least the second recess 45b. As a result, the degree of engagement between the spring body of the S spring 22 and the seat cushion pad 25 is improved, and the effect of preventing slippage is enhanced. The displacement of the seat cushion pad 25 can be prevented in each of the first direction DRF and the second direction DRS.

  In the present embodiment, the seat cushion pad 25 is integrated with each other, and is fixed to the pad main body 25a which is shaped like the pressure receiving surface on the surface of the surface layer pad 25b, and is overlapped and fixed on the back side of the pad main body 25a. And a sound absorbing pad 41 that divides 43. Since the convex piece 43 is formed on the sound absorbing pad 41 which is a separate body of the surface layer pad 25b and the pad main body 25a, the convex piece 43 can be attached later to the surface layer pad 25b and the pad main body 25a having a specific shape. Complicating the shape of the seat cushion pad 25 is avoided as much as possible. The production of the seat cushion pad 25 is made efficient.

  As shown in FIG. 9, the connecting bodies 23a and 23b are formed in a plate shape that is long in the left-right direction. The seat cushion pad 25 is overlaid on the plate surfaces of the coupling bodies 23a and 23b. First and second convex portions 51a and 51b that at least partially enter the first concave portion 45a and the second concave portion 45b are formed on the plate surfaces of the coupling bodies 23a and 23b. Thus, since the first convex portion 51a and the second convex portion 51b of the coupling bodies 23a and 23b enter the first concave portion 45a and the second concave portion 45b, respectively, the coupling bodies 23a and 23b are used for preventing the seat cushion pad 25 from shifting. be able to. Moreover, since the connecting bodies 23a and 23b are formed in a plate shape, the displacement of the seat cushion pad 25 can be effectively prevented over a wide range.

  As shown in FIG. 10, the first convex portion 52 a and the second convex portion 52 b that at least partially enter the first concave portion 45 a and the second concave portion 45 b may be formed on the plate surface of the pan frame 18 b. Thus, since the first convex portion 52a and the second convex portion 52b that enter the first concave portion 45a and the second concave portion 45b, respectively, are formed in the pan frame 18b, the pan frame 18b, which is an existing component, can be used to prevent the seat cushion pad 25 from shifting. It can be used effectively.

  The pan frame 18b may be formed with recesses 53a and 53b for receiving the protrusions 43 of the seat cushion pad 25. The concave portion may include a first concave portion 53a that receives the convex piece 43 belonging to the first convex piece group 44a and a second concave portion 53b that receives the convex piece 43 belonging to the second convex piece group 44b. Thus, the recesses 53a and 53b for the convex piece 43 are formed in the pan frame 18b, so that the displacement of the seat cushion pad 25 can be more effectively prevented. However, only the first and second convex portions 52a and 52b may be arranged on the pan frame 18b, or only the first and second concave portions 53a and 53b may be arranged. In addition, the convex portion may include only one of the first convex portion 52a and the second convex portion 52b, and the concave portion may include only one of the first concave portion 53a and the second concave portion 53b.

  As shown in FIG. 11, the vehicle seat 11 may include an intermediate member 54 that is disposed between the seat cushion pad 25 and the S spring 22 and partitions the convex piece 43. The seat cushion pad 25 may be stacked on the intermediate member 54. The intermediate member 54 may be fixed to the back surface of the seat cushion pad 25, and relative displacement may be allowed in the surface direction between the two. Thus, since the convex piece 43 is partitioned into the intermediate member 54 that is separate from the seat cushion pad 25, the range of selection of the material of the convex piece 43 is expanded. In addition, since the seat cushion pad 25 itself is not specially crafted, good sitting comfort can be maintained.

  Note that the pressure receiving members such as the S spring 22 and the pan frame 18b as described above may be similarly incorporated in the seat back 14. In this case, the convex piece 43 may be defined on the seat back pad 31. The S spring incorporated in the seat back 14 may enter the concave portion defined between the convex pieces 43. S springs should just be mutually connected by the connection body which has the 1st convex part and the 2nd convex part. In addition, similarly to the pan frame 18b, the first and second convex portions and the first and second concave portions may be defined in the pan frame incorporated in the seat back 14. An intermediate member may be interposed between the seat back pad 31 and the S spring.

  DESCRIPTION OF SYMBOLS 11 ... Vehicle seat, 18b ... Pan frame, 22 ... Spring body (S spring) as pressure receiving member, 23a ... Resin member (connector), 23b ... Resin member (connector), 25 ... Pad (seat cushion pad) , 25a ... first body (pad body), 25b ... first body (surface layer pad), 41 ... second body (sound absorbing pad), 43 ... convex piece, 44a ... first convex piece group, 44b ... second convex piece Group, 45a ... first recess, 45b ... second recess, 46a ... first region (of spring body), 46b ... second region (of spring body), 51a ... first projection, 51b ... second projection, 53a ... recess, 53b ... recess, 54 ... intermediate member, DRF ... first direction, DRS ... second direction.

Claims (10)

A pad (25) having a first surface that represents the shape of a pressure-receiving surface that receives the occupant's body, and a second surface that forms the plurality of convex pieces (43) on the back side of the first surface;
A pressure receiving member (18b, 22) that supports the pad (25) from the second surface and at least partially enters a recess defined between the projecting pieces (43);
A vehicle seat comprising:   The vehicle seat according to claim 1, wherein the pressure receiving member (22) has a spring body that at least partially enters the recess.   The vehicle seat according to claim 2, wherein the convex piece (43) is an assembly of long first convex pieces extending in parallel with each other in the first direction (DRF) along the second surface. A group of first convex pieces (44a) and long second convex pieces extending parallel to each other in a second direction (DRS) intersecting the first direction (DRF) along the second surface. A second convex piece group (44b), wherein the spring body includes at least a first region (46a) that enters at least a first concave portion (45a) defined between the first convex pieces, and the second convex portion. A vehicular seat comprising: a second area (46b) entering at least a second recess (45b) defined between the pieces.   The vehicle seat according to any one of claims 1 to 3, wherein the pressure-receiving member (22) is fixed to a plurality of the spring bodies and at least partially enters the concave portion (23a, 23b). A vehicle seat.   5. The vehicle seat according to claim 4, wherein the resin member (23 a, 23 b) is formed in a plate shape, and a convex portion (51 a, 51 b) that at least partially enters the recess is formed on the plate surface. A vehicle seat.   The vehicle seat according to any one of claims 1 to 5, wherein the pressure receiving member includes a pan frame (18b) that is formed in a plate shape and has a convex portion that at least partially enters the concave portion. A vehicle seat.   The vehicle seat according to claim 6, wherein the pan frame (18b) is formed with concave portions (53a, 53b) for receiving the convex pieces (43) of the pad (25). Sheet.   The vehicular seat according to any one of claims 1 to 7, wherein the pad (25) has a first body (25a, 25b) that is shaped like a shape of the pressure-receiving surface on the surface, and the first body ( A vehicle seat comprising: a second body (41) which is overlapped and fixed on the back side of 25a) and defines the convex piece (43).   The vehicle seat according to any one of claims 1 to 7, wherein the intermediate member (54) is disposed between the pad (25) and the pressure-receiving member (22) to partition the convex piece (43). A vehicle seat.   The vehicle seat according to any one of claims 1 to 9, wherein the convex piece (43) protrudes below the pressure receiving member (22).