JP2016215775A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat, in which a space part is formed by a small number of parts and a dynamic damper is arranged in the space part, and which suppresses increment of weight.SOLUTION: A vehicle seat comprises: a front panel 32 and a rear panel 33 which are mounted on a stay 31 constituting a backbone of a headrest 3 and form a space part 34 inside; and a dynamic damper 10 with a heavy bob 6 and an elastic member 8, which are arranged in a space part 34. The front panel 32 with strength enough to oscillatably hold the dynamic damper is mounted on the stay 31, and the rear panel 33 that is a lower strength than that of the front panel 32 is attached to the front panel 32.SELECTED DRAWING: Figure 5

Description

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

  In the vehicle seat, the vibration transmitted from the vehicle body to the vehicle seat is transmitted to the dynamic damper provided in the headrest and resonated, thereby converting the vibration of the vehicle seat into the vibration of the dynamic damper. What suppresses the vibration of is known. In the vehicle seat described in Patent Document 1, a dynamic damper is disposed in a space formed inside the headrest. Specifically, an inner cover is fixed to the stay to provide a space therein, and a dynamic damper is attached to the stay via the bracket in the space.

JP 60-151135 A

  In the technique described in Patent Document 1, the inner cover is attached to the stay to provide a space in the headrest, and the bracket is used to attach the dynamic damper to the stay. In other words, two parts, a part for forming the space and a part for attaching the dynamic damper, are necessary, and there is a problem that the number of parts increases. In order to solve this problem, it is conceivable to attach a dynamic damper to a part for forming the space part while securing the strength of the part for forming the space part. However, generally, when trying to secure the strength of the parts, the weight tends to increase.

  In view of such problems, an object of the present invention is to provide a vehicle seat in which a space portion is formed with a small number of parts and a dynamic damper is disposed in the space portion, and an increase in weight is suppressed. is there.

  A first aspect of the present invention is a vehicle seat, and the vehicle seat includes a panel member attached to a skeleton member of the vehicle seat and forming a space therein, a weight, and an elastic body. And a dynamic damper disposed in the space, wherein the panel member is formed by combining a plurality of panels, and at least one high-strength panel and a low-strength panel having a lower strength than the high-strength panel The high-strength panel is attached to the skeleton member with strength to hold the dynamic damper so as to vibrate.

  According to the first invention, among the plurality of panel members forming the space portion, at least one high-strength panel is attached to the skeleton member with strength to hold the dynamic damper so as to vibrate. As a result, the low-strength panel, which is a panel member other than the high-strength panel, only needs to have a function of holding the space portion, so that the strength can be set low and the weight can be reduced. The increase in weight can be suppressed.

  According to a second aspect of the present invention, in the first aspect, the high-strength panel is a metal panel, and the low-strength panel is a resin panel.

  According to the second invention, since the high-strength panel can be attached to the stay by means of welding or the like, the productivity is good, and the low-strength panel is made of resin, so that the effect of weight reduction is increased.

  According to a third aspect of the present invention, in the first aspect or the second aspect, the high-strength panel is a single steel plate pressed part, and the low-strength panel is a single resin molded product. .

  According to the third invention, the panel member can be formed by a combination of two panels, and the high-strength panel is a pressed part made of steel plate, and the low-strength panel is a resin-molded product. it can.

1 is a partial perspective view of a vehicle seat according to an embodiment of the present invention. It is a perspective view of the headrest of the above-mentioned embodiment. It is a front view of a part of seat back and headrest of the above-mentioned embodiment. FIG. 4 is a sectional view taken along line IV-IV in FIG. 3. It is a VV arrow line sectional view in Drawing 3. It is a disassembled perspective view of the state which attached the dynamic damper to the frame of the headrest of the said embodiment.

  1 to 6 show an embodiment of the present invention. This embodiment is an example in which the present invention is applied to an automobile seat. In each figure, each direction of the automobile when the automobile seat is attached to the automobile is indicated by an arrow. In the following description, the description regarding the direction is made based on this direction. The vehicle seat 1 of the present embodiment includes a seat cushion 4 serving as a seating portion, a seat back 2 serving as a backrest, and a headrest 3 that supports the head. The seat back 2 is connected to the rear end portion of the seat cushion 4 via the recliner 7 so that the angle can be adjusted at both lower ends thereof. Here, the automobile seat 1 corresponds to the “vehicle seat” in the claims.

  As shown in FIG. 1, the seat back 2, the headrest 3, and the seat cushion 4 include a frame 2 a, 3 a, and 4 a that form a skeleton, pads 2 b, 3 b, and 4 b that are cushion materials, and a skin 2 c that is a skin material, respectively. 3c, 4c. Pads 2b, 3b, and 4b are placed on the frames 2a, 3a, and 4a, and the pads 2b, 3b, and 4b are covered with skins 2c, 3c, and 4c. The frame 2a of the seat back 2 includes a pair of left and right side frames 2a1, a pipe-like upper frame 2a2 that connects the upper portions of the side frames 2a1, and a press plate-like lower panel 2a3 that connects the lower portions of the side frames 2a1. Have

  As shown in FIG. 1 and FIG. 3, a pair of metal square brackets 2d are attached to the upper frame 2a2. A substantially cylindrical support member 2e made of resin is inserted and fixed to the bracket 2d. One of the support members 2e is provided with a stopper 2f for adjusting the height of the headrest 3 relative to the seat back 2.

  As shown in FIGS. 2, 3 and 6, the frame 3 a of the headrest 3 is constituted by a stay 31 formed by bending a pipe member having a circular cross section. The stay 31 includes a pair of vertical column portions 31a extending in the vertical direction, a pair of oblique column portions 31b extending from the upper end of the vertical column portion 31a forward and toward the center of the headrest, and the upper ends of the oblique column portions 31b. And a connecting portion 31c to be connected. An R-shaped portion 31d is provided at the lower end portion of the vertical column portion 31a so as to conform to the definition of the internal protrusion. As shown in FIG. 3, the vertical column portion 31 a is inserted into the support member 2 e and attached to the seat back 2. A plurality of grooves (not shown) are formed in one of the stays 31, and the stay 31 is positioned with respect to the support member 2e by the grooves and the stopper 2f. Thereby, the height with respect to the seat back 2 of the headrest 3 can be adjusted. Here, the stay 31 corresponds to a “frame member” in the claims.

  As shown in FIGS. 3 and 6, the front panel 32 is a press-formed part made of a steel plate, and the outer shape viewed from the front-rear direction has a substantially trapezoidal shape along the upper shape of the stay 31. The left and right end portions of the front panel 32 are provided with longitudinal joint portions 32 a bent in an arc shape having an inner diameter slightly larger than the outer diameter of the stay 31 toward the rear. Further, the upper end portion of the front panel 32 is provided with a lateral joint portion 32b bent in an arc shape having an inner diameter slightly larger than the outer diameter of the stay 31 toward the rear. The vertical joint portion 32a and the lateral joint portion 32b are portions that are fixed by welding in a state of being in contact with the upper portion of the oblique column portion 31b of the stay 31 and the connecting portion 31c from the front. A rear convex portion 32 c that is convex rearward is provided at the upper center of the front panel 32. The rear convex portion 32c has a substantially triangular cross section cut by a surface extending perpendicularly to the general portion 32e of the front panel 32, and includes a rear surface portion 32c1, side surfaces 32c2 on both left and right sides, and an upper surface portion 32c3. A pair of locking holes 32c11 are provided at an upper portion of the rear surface portion 32c1 at an equal distance from the center line in the left-right direction. The locking hole 32c11 is for attaching the dynamic damper 10 described later. A front convex portion 32 d that is convex toward the front direction is provided at the center lower portion of the front panel 32. The front protrusion 32d has a front surface 32d1, side surfaces 32d2 on the left and right sides, and a lower surface 32d3 having a substantially triangular cross section cut by a surface extending perpendicularly to the general portion 32e of the front panel 32. A pair of locking holes 32d11 are provided at an equal distance from the center line in the left-right direction at the lower portion of the front surface portion 32d1. The locking hole 32d11 is for attaching the dynamic damper 10 described later. The rear surface portion 32c1 and the front surface portion 32d1 are configured to be included in substantially the same plane.

  As shown in FIG. 6, the rear panel 33 is a semi-shell-shaped member that is bulged so as to be convex in a substantially backward direction made of resin having adhesiveness, and includes a bulging portion 33 a and a bulging portion. And a flange portion 33b provided around the front end portion of 33a. When the flange portion 33b of the rear panel 33 is brought into contact with the general portion 32e of the front panel 32, the space portion 34 in which the dynamic damper 10 described later is disposed on the inner side surrounded by the front panel 32 and the bulging portion 33a. It is formed. Here, the resin having adhesiveness is a modified polyolefin in which a functional group is introduced into polyolefin to impart adhesiveness, and examples thereof include Admer (registered trademark) manufactured by Mitsui Chemicals. The rear panel 33 is obtained by vacuum forming such a resin sheet having adhesiveness. In addition to vacuum forming, injection molding, blow molding, and the like can be applied. Here, a combination of the front panel 32 and the rear panel 33 corresponds to a “panel member” in the claims. The front panel 32 corresponds to a “high-strength panel” in the claims, and the rear panel 33 corresponds to a “low-strength panel” in the claims.

  As shown in FIG. 6, the dynamic damper 10 includes a weight 6 and a pair of elastic members 8 that elastically support the weight 6 so as to be swingable with respect to the front panel 32. Here, the elastic member 8 corresponds to an “elastic body” in the claims.

  The weight 6 is a solid, substantially rectangular parallelepiped part made of metal such as steel. The material of the weight 6 is not limited to metal, but the use of metal because of the specific gravity is effective for reducing the size of the dynamic damper 10. In addition, the shape of the weight 6 is not limited to a substantially rectangular parallelepiped, and may be a wide range of flat shapes such as a disk shape and a polygonal column shape. A pair of upper and lower engaging holes 6 a are provided at equal distances from the center line in the left-right direction of the weight 6. All four engagement holes 6a have the same diameter, and are set to be slightly larger than a column portion 8b1 of a weight engagement projection portion 8b of an elastic member 8 described later.

  The elastic member 8 is a member made of styrene / butadiene rubber or ethylene propylene rubber, and is manufactured by vulcanization molding. As shown in FIGS. 5 and 6, the elastic member 8 includes a main body portion 8a extending in the vertical direction, a pair of upper and lower weight engaging protrusions 8b provided at the center of the main body portion 8a, and a main body portion 8a. Panel engaging projections 8c provided on the upper and lower ends respectively.

  The main body portion 8a includes a rectangular column portion 8a1 arranged vertically, a rectangular column portion 8a2 arranged in the center, and a connecting wall portion 8a3 connecting the square column portion 8a1 and the rectangular column portion 8a2. The rectangular column portion 8a1 has a length in the front-rear direction that is longer than the rectangular column portion 8a2 and the connecting wall portion 8a3, the rear surface portion is flush with the rectangular column portion 8a2 and the connecting wall portion 8a3, and the front surface portion is the rectangular column portion 8a2. And projecting forward from the connecting wall 8a3. The rectangular column portion 8a1 is provided with a cylindrical hole 8a11 having a length slightly shorter than the length in the front-rear direction of the rectangular column portion 8a1 in the forward direction. Cylindrical holes 8b11 having a length slightly shorter than the length in the front-rear direction of the rectangular column 8a2 are provided in the upper and lower ends of the rectangular column 8a2.

  As shown in FIGS. 5 and 6, the weight engaging projection 8b has a shape in which an umbrella-shaped retaining portion 8b2 is provided at the tip of a columnar column 8b1. The longitudinal length and diameter of the column portion 8b1 are set slightly smaller than the longitudinal length and inner diameter of the engagement hole 6a of the weight 6 respectively. The retaining portion 8b2 has an isosceles trapezoidal cross section cut along the axial direction including the axis of the column portion 8b1, and the length of the upper base is smaller than the inner diameter of the engagement hole 6a of the weight 6, and The length is set larger than the inner diameter of the engagement hole 6 a of the weight 6. A cylindrical hole 8b21 coaxial with the axis of the column portion 8b1 is provided in the upper bottom portion. This makes it easier to insert the weight engaging protrusion 8b into the engaging hole 6a of the weight 6, and when inserted, the lower bottom portion of the cross section engages with the peripheral edge of the engaging hole 6a. To prevent it from coming off. The weight engaging protrusion 8b is erected in the rearward direction coaxially with the cylindrical hole 8b11 with respect to the rectangular column 8a2.

  As shown in FIG. 5, the panel engagement protrusion 8c has a shape in which an umbrella-shaped retaining portion 8c2 is provided at the tip of a columnar column portion 8c1. The longitudinal length and diameter of the column portion 8c1 are set slightly smaller than the longitudinal length and inner diameter of the locking hole 32c11 of the front panel 32, respectively. The retaining portion 8c2 has an isosceles trapezoidal cross section cut by a surface extending in the axial direction including the axis of the column portion 8c1, and the length of the upper base is smaller than the inner diameter of the locking hole 32c11 of the front panel 32. The length is set larger than the inner diameter of the locking hole 32c11 of the front panel 32. A cylindrical hole 8c21 coaxial with the axis of the column portion 8c1 is provided in the upper bottom portion. This makes it easier to insert the panel engagement protrusion 8c into the locking hole 32c11 of the front panel 32, and when inserted, the lower bottom portion of the cross section engages with the peripheral edge of the locking hole 32c11. It is designed to prevent it from coming off. The panel engaging protrusion 8c is erected in the forward direction coaxially with the cylindrical hole 8a11 with respect to the quadrangular column 8a1. It should be noted that the relationship between the panel engagement protrusion 8c provided in the lower quadrangular column 8a1 and the locking hole 32d11 of the front panel 32 is also the same as that of the panel engagement protrusion 8c provided in the upper quadrangular column 8a1. This is the same as the relationship with the locking hole 32c11 of the front panel 32. When the upper panel engagement protrusion 8c of the elastic member 8 is inserted into the locking hole 32c11 and the lower panel engagement protrusion 8c is inserted into the locking hole 32c11, the main body 8a is connected to the rear surface 32c1 of the front panel 32 and It arrange | positions in parallel with the front-surface part 32d1. This is because the rear surface portion 32c1 and the front surface portion 32d1 are configured to be included in substantially the same plane, and the upper and lower panel engaging protrusions 8c have the same shape.

  A method of disposing the dynamic damper 10 in the space 34 formed by the front panel 32 and the rear panel 33 will be described with reference to FIGS. The front panel 32 is fixed to the upper portion of the stay 31. Specifically, the vertical joint portion 32a and the lateral joint portion 32b of the front panel 32 are fixed by welding in a state where they are in contact with the upper portion of the oblique column portion 31b of the stay 31 and the connecting portion 31c from the front. . Next, the dynamic damper 10 in which the pair of elastic members 8 are previously attached to the weight 6 is fixed to the front panel 32. The pair of elastic members 8 is attached to the weight 6 with two weight engaging protrusions of the elastic member 8 with respect to each of the pair of left and right engaging holes 6a provided to be separated in the vertical direction of the weight 6. This is done by fitting 8b. At this time, when inserting the weight engaging projection 8b into the engaging hole 6a, a cylindrical pin is inserted into the hole 8b11 of the elastic member 8 so that the retaining portion 8b2 of the weight engaging protruding portion 8b is inserted into the engaging hole. It is better to push into 6a. As a result, the dynamic damper 10 is formed by arranging the main body portions 8 a of the two elastic members 8 in parallel on the left and right sides of the weight 6. Next, the upper panel engagement protrusions 8c of the left and right elastic members 8 are inserted into the locking holes 32c11 of the front panel 32, and the lower panel engagement protrusions 8c are inserted into the locking holes 32d11 of the front panel 32. The dynamic damper 10 is fixed to the front panel 32. At this time, when inserting the panel engaging protrusion 8c into the locking holes 32c11 and 32d11, a cylindrical pin is inserted into the hole 8a11 of the elastic member 8 so that the retaining portion 8c2 of the panel engaging protrusion 8c is locked into the locking hole. It is good to push into 32c11 and 32d11. The locking holes 32c11 and 32d11 are sealed by the retaining portion 8c2 of the panel engaging protrusion 8c.

  5 and 6, the rear panel 33 is attached to the front panel 32 to which the dynamic damper 10 is attached. With the flange portion 33b of the rear panel 33 in contact with the general portion 32e of the front panel 32, the entire flange portion 33b is heated and melted and bonded to the general portion 32e. As a result, the dynamic damper 10 is formed between the front panel 32 and the rear panel 33 in combination with the blockage of the locking holes 32c11 and 32d11 of the front panel 32 by the blocking portion 8c2 of the panel engagement protrusion 8c. It will be arrange | positioned in the space part 34 in the sealed state. At this time, the weight 6 of the dynamic damper 10 can vibrate relative to the front panel 32 mainly in the front-rear and left-right directions.

  A method for manufacturing the headrest 3 will be described. A urethane foam mold having a cavity corresponding to the outer shape of the headrest 3 is set in a state in which a frame 3a to which the dynamic damper 10 is attached and a rear panel 33 attached thereto are covered with a bag-like skin 3c. . A urethane foam raw material is injected into the outer skin 3c, and after completion of the foam molding, the mold is removed to obtain the headrest 3. Here, the dynamic damper 10 is disposed in a space 34 formed by the front panel 32 and the rear panel 33. The locking holes 32c11 and 32d11 of the front panel 32 are sealed by the retaining portion 8c2 of the panel engagement protrusion 8c, and the outer peripheral portions of the front panel 32 and the rear panel 33 are sealed by adhesion. This suppresses the urethane foam material from entering the space 34 during the foam molding of the urethane foam material. Therefore, a sufficient space portion 34 is secured for the dynamic damper 10 to vibrate.

  The embodiment configured as described above has the following operational effects. In the headrest 3, the dynamic damper 10 is attached to the front panel 32 having the strength to hold the dynamic damper 10 so as to vibrate among the front panel 32 and the rear panel 33 that form the space 34. As a result, the rear panel 33 only needs to be strong enough to withstand the foaming pressure of the foamed urethane raw material by forming the space 34, so that the rear panel 33 can be made of low strength resin and can be reduced in weight. it can. And the weight increase of the vehicle seat 1 can be suppressed. Further, since the front panel 32 is a press-formed part made of a steel plate, it can be fixed to the stay 31 by welding, and the productivity is good.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example, the following can be mentioned.

  1. In the above embodiment, the front panel 32 is attached to the stay 31 that is a skeleton member in the headrest 3, but the present invention is not limited thereto, and the front panel 32 may be attached to the skeleton member in the seat back 2 or the seat cushion 4.

  2. In the above embodiment, the rear panel 33 is made of an adhesive resin. However, the present invention is not limited to this, and it may be made of resin having no adhesiveness or rigid paper, and may be attached to the front panel 32 by mechanical means such as fitting or screwing, or may be attached by adhesion or the like. That is, as long as the rear panel 33 has a strength that can withstand the foaming pressure of the urethane foam raw material, any can be employed.

  3. In the above-described embodiment, the front panel 32 is a press-formed part made of a steel plate, but is not limited thereto, and may be a light-alloy molded product or a fiber-reinforced composite resin molded product. That is, any one having a strength sufficient to hold the dynamic damper 10 so as to vibrate can be employed.

  4). In the above embodiment, the present invention is applied to an automobile seat. However, the present invention is not limited to this, and the present invention can also be applied to a railway vehicle, an airplane, a ship, and the like.

1 Car seat (vehicle seat)
2 Seat back 3 Headrest 3b Pad (cushion material)
6 Weight 8 Elastic member (elastic body)
10 Dynamic damper 31 Stay (frame member)
32 Front panel (high strength panel)
33 Rear panel (low strength panel)
34 Space

Claims (3)

A vehicle seat,
The vehicle seat includes a panel member that is attached to a skeleton member of the vehicle seat to form a space portion therein, a weight and an elastic body, and a dynamic damper that is disposed in the space portion. Prepared,
The panel member is formed by combining a plurality of panels, and includes at least one high-strength panel and a low-strength panel having a lower strength than the high-strength panel, and the high-strength panel holds the dynamic damper so as to vibrate. A vehicle seat attached to the skeleton member with sufficient strength.   2. The vehicle seat according to claim 1, wherein the high-strength panel is a metal panel, and the low-strength panel is a resin panel. 3. The vehicle seat according to claim 1 or 2, wherein the high-strength panel is a pressed part made of steel plate and the low-strength panel is a molded product made of resin.

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