JP2010268970A - Vehicle seat - Google Patents

Abstract

An object of the present invention is to provide a vehicle seat that can suppress left and right vibrations at the same time as suppressing vibrations before and after a seat back.
A support portion 13 that supports a headrest 14 is provided on a seat back 12 of a vehicle seat 10, and the support portion 13 is a first support portion 41 that elastically supports a support 33 of a headrest in the front-rear direction. And a second support portion 51 that elastically supports the support 33 of the headrest from side to side. The first support portion 41 includes a front support piece 43 and a rear support piece 44, and the second support portion 51 includes a left support piece 53 and a right support piece 54.
[Selection] Figure 3

Description

  The present invention relates to an improvement in a vehicle seat.

  A headrest support structure that is attached to a vehicle seat and supports the head of an occupant is known as a prior art (see, for example, Patent Document 1 (FIG. 2)).

  In FIG. 2 of Patent Document 1, an upper piece 19 and a lower piece 21 are used for a frame 12 of a seat back provided in a vehicle seat (the reference sign is the same as that of the same publication; the same applies hereinafter) A headrest bracket 14a having a U shape is attached.

  A hole 20 is formed in the upper piece 19 of the headrest bracket, a bar-like spring 24 is horizontally passed through the hole 20, a through hole 22 is formed in the lower piece 21, and the headrest guide 16a is provided in these holes 20 and 22. The headrest is formed by penetrating, locking the lower end portion of the headrest guide 16a to the lower piece portion 21, and urging the cylindrical portion of the headrest guide 16a backward by an elastic force by a spring 24 passed to the upper piece portion 19. The headrest guide 16a is elastically supported on the bracket 14a. With this configuration, the frequency characteristics of the headrest are set, and the vibration generated in the seat back is suppressed by vibrating the headrest.

  By the way, the front and rear direction vibration and the left and right direction vibration are generated in the vehicle seat, and the frequency characteristics of the front and rear direction vibration and the left and right direction vibration may be different. In the technique of Patent Document 1, vibrations before and after the seat back can be suppressed, but the left and right vibrations of the seat back are not taken into consideration, and further improvement is necessary.

Japanese Utility Model Publication No. 61-149552

  It is an object of the present invention to provide a vehicle seat that can suppress left and right vibrations at the same time as suppressing vibrations before and after a seat back.

  The invention according to claim 1 is a vehicle seat comprising: a seat cushion; a seat back as a backrest raised at the rear portion of the seat cushion; and a headrest attached to the seat back via a support portion. The portion is composed of a first support portion that elastically supports the headrest column in the front-rear direction, and a second support portion that elastically supports the headrest column in the left-right direction.

  The invention according to claim 2 is characterized in that the first support part and the second support part have different elastic characteristics.

  The invention according to claim 3 is characterized in that the first support portion and the second support portion are made of different materials.

  The invention according to claim 4 is characterized in that the first support portion and the second support portion are made of the same material and have different thicknesses in the direction in which the support columns are supported. .

  The invention according to claim 5 is characterized in that the first support portion and the second support portion support the column at different height positions.

  In the invention which concerns on Claim 6, a 1st support part has a 1st some elastic member which supports a support | pillar in the position respectively spaced apart to the upper part and the lower part, and a 2nd support part is an upper part and a lower part It has the 2nd some elastic member which supports a support | pillar in the mutually spaced position, It is characterized by the above-mentioned.

  The invention according to claim 7 is characterized in that at least one of the first plurality of elastic members supports the support column at a height position different from that of at least one of the second plurality of elastic members. .

  The invention according to claim 8 is characterized in that the first support part and the second support part are arranged inside the headrest.

  In the invention which concerns on Claim 9, a support part is provided with the cylindrical headrest bracket by which a support | pillar is penetrated, and arrange | positions a 1st support part and a 2nd support part along the inner periphery of this headrest bracket, The support column is supported by the inner peripheral edge of the first support part and the inner peripheral edge of the second support part.

  In the first aspect of the present invention, the support portion includes a first support portion that elastically supports the headrest column in the front-rear direction, and a second support portion that elastically supports the headrest column in the left-right direction.

As a result, the frequency characteristics in the front-rear direction of the headrest can be set by the first support portion, and the frequency characteristics in the left-right direction of the headrest can be set by the second support portion, which occurs in the seat back. The frequency characteristics in the front-rear direction and the left-right direction of the headrest can be freely set corresponding to the frequency characteristics in the front-rear direction and the left-right direction.
For example, by setting the frequency characteristics of the headrest in accordance with the frequency range in which the seat back vibration is desired to be lowered, a dynamic damper effect can be obtained, and vibrations in the front-rear direction and the left-right direction of the seat back can be suppressed.

  In the invention according to claim 2, since the first support portion and the second support portion have mutually different elastic characteristics, even if the frequency characteristics required for the front and rear and the left and right are different, it is possible to cope. be able to.

  In the invention according to claim 3, since the first support portion and the second support portion are made of different materials, the frequency characteristics can be freely set in the front-rear direction and the left-right direction.

  In the invention which concerns on Claim 4, since the 1st support part and the 2nd support part are comprised with the same material, material can be made common and the increase in material cost can be suppressed.

  In the invention which concerns on Claim 5, the 1st support part and the 2nd support part were made to support a support | pillar in a mutually different height position. By simply changing the heights of the first support portion and the second support portion, it is possible to easily change the front-rear and left-right frequency characteristics.

  In the invention which concerns on Claim 6, a 1st support part has a 1st some elastic member which supports a support | pillar in the separated position, and a 2nd support part supports the support | pillar in the spaced apart position. 2 having a plurality of elastic members. With such a configuration, the column can be supported at a position separated by the first plurality of elastic members and the second plurality of elastic members, so that the amplitude of the headrest in the front-rear direction and the left-right direction can be set. . Since the amplitude of the headrest in the front-rear direction and the left-right direction can be set, the amount of reduction in the vibration of the seat back can be set.

  In the invention according to claim 7, at least one of the first plurality of elastic members supports the support column at a height position different from that of at least one of the second plurality of elastic members. Since the support column is supported at different height positions, the amplitude of the headrest in the front-rear direction and the left-right direction can be set. If the amplitude of the headrest in the front-rear direction and the left-right direction can be set, the amount of vibration reduction of the seat back can be set freely.

  In the invention which concerns on Claim 8, the 1st support part and the 2nd support part are arrange | positioned inside the headrest. Even if the height from the seat back to the headrest is changed, the frequency characteristic of the headrest does not change, so that a preset frequency characteristic can be obtained regardless of the height of the headrest.

  In the invention which concerns on Claim 9, the support | pillar of the headrest is supported by the inner periphery of the 1st support part, and the inner periphery of the 2nd support part. Since the column is directly supported by the first support portion and the second support portion, an increase in the number of parts can be suppressed.

1 is a perspective view of a vehicle seat according to the present invention. It is a principal part enlarged view of FIG. It is a perspective view explaining the structure of the support part with which the vehicle seat which concerns on this invention is equipped. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. FIG. 5 is a cross-sectional view taken along line 5 (a) -5 (a) of FIG. 4 and a cross-sectional view taken along line 5 (b) -5 (b) of FIG. It is a figure explaining the frequency characteristic of the seat back with which the vehicle seat which concerns on this invention is equipped. It is another Example figure of FIG. It is another Example figure of FIG. FIG. 6 is a diagram showing still another embodiment of FIG. 5. FIG. 5 is a diagram showing still another embodiment of FIG. 4. It is another Example figure of FIG. It is a modification of FIG.

  Hereinafter, embodiments of the present invention will be described in detail. In the drawings and examples, “up”, “down”, “front”, “rear”, “left”, and “right” respectively indicate directions viewed from the driver who rides the vehicle. The drawings are viewed in the direction of the reference numerals.

First, Embodiment 1 of the present invention will be described with reference to the drawings.
In FIG. 1, a vehicle seat 10 that is provided in a vehicle and on which an occupant sits includes a seat cushion 11, a seat back 12 as a backrest raised at the rear of the seat cushion 11, and a support portion 13 on the seat back 12. And a headrest 14 attached via

A seat frame 16 as a bone member is disposed inside the seat cushion 11, and a back frame 17 as a bone member is disposed inside the seat back 12.
The back frame 17 is hung on the vertical bar portions 21, 21 erected on the left and right sides, the upper horizontal bar 22 spanning the upper end portions of these vertical bar portions 21, 21, and the lower end portions of the vertical bar portions 21, 21. The lower horizontal bar 23 that has been handed over.

  In FIG. 2, headrest brackets 31, 31 as left and right pipe members are attached to the upper horizontal bar 22, and column guides 32, 32 are inserted into these headrest brackets 31, 31, and these column guides 32, 32. In addition, the headrest 14 is attached to the seat back 12 by inserting a column 33 that is substantially U-shaped and integrated with the headrest 14 when viewed from the front of the vehicle. In the figure, 39 and 39 are cap members.

  3 and 4, the support portion 13 is provided on the inner peripheral surface 36 of the headrest bracket, and a column guide 32 as a pipe member is disposed on the inner peripheral surface 38 of the support portion 13. A headrest column 33 is inserted into the surface 34.

  The support portion 13 is provided in front of and behind the headrest support 33 and elastically supports the headrest support 33 in the front-rear direction. The support 13 is provided on the left and right of the headrest support 33 and elastically supports the headrest support 33 in the left and right. And a second support portion 51. The first support part 41 and the second support part 51 are provided to be separated from each other.

The first support portion 41 includes a front support piece 43 and a rear support piece 44, and the second support portion 51 includes a left support piece 53 and a right support piece 54.
The first support portions 41 and 41 are provided in two stages in the vertical direction, and the second support portions 51 and 51 are provided in two stages in the vertical direction.

  In FIG. 5 (a), a first support portion 41 that elastically supports the headrest support 33 in the front-rear direction, the headrest brackets 31, 31 are spaced apart from each other by an interval (H1) between the inner upper portion and the inner lower portion. A front support piece 45 and a first lower front support piece 46 are provided. Similarly, a first upper rear support piece 47 and a first lower rear support portion 48 are provided at an inner upper portion and an inner lower portion of the headrest brackets 31, 31 with an interval (H 1).

  In FIG. 5 (b), the second support part 51 elastically supports the headrest support 33 in the right and left direction, and the second upper left and right parts are spaced apart from each other by an interval (H2) between the inner upper part and the inner lower part of the headrest brackets 31 and 31. A support piece 55 and a second lower left support piece 56 are provided. Similarly, a second upper right support piece 57 and a second lower right support portion 58 are provided at an inner upper portion and an inner lower portion of the headrest bracket 31 with an interval (H2).

  The operation of the vehicle seat described above will be described next. In the drawing, the dotted line indicates the frequency characteristic of the seat back when no support member is interposed, and the solid line indicates the frequency characteristic of the seat back when the support member is interposed. The description will be made with reference to FIG.

  In FIG. 6A, when the headrest support 33 is elastically supported back and forth by the first support portion 41 and the frequency characteristic of the headrest is set to the frequency a1, the magnitude of vibration in the front-rear direction of the seat back 12 is suppressed. However, the magnitude of vibration at the resonance point generated at the frequency (a1) can be greatly reduced.

  In FIG. 6B, when the headrest column 33 is elastically supported by the second support portion 51 in the left and right directions and the frequency characteristic of the headrest is set to the frequency b1, the vibration of the seat back 12 in the left and right direction is large. It is possible to significantly reduce the magnitude of vibration at the resonance point that occurs at the frequency (b1) while suppressing this.

Thereby, the frequency characteristic in the front-rear direction of the headrest 14 can be set by the first support portion 41, and the frequency characteristic in the left-right direction of the headrest 14 can be set by the second support portion 51. The frequency characteristics in the front-rear direction and the left-right direction of the headrest 14 can be freely set corresponding to the frequency characteristics in the front-rear direction and the left-right direction generated in the seat back.
By setting the frequency characteristics of the headrest 14 in accordance with the frequency range (a1, b1) where the seat back vibration is desired to be lowered, a dynamic damper effect can be obtained and vibrations in the front-rear direction and the left-right direction of the seat back 14 are suppressed. be able to. At this time, the frequency range in which the seatback vibration is desired to be reduced is not limited to the peak value as in a1 and b1, and can be set as appropriate.

In addition, you may make it the 1st support part 41 and the 2nd support part 51 have mutually different elastic characteristics. When the first support portion 41 and the second support portion 51 have different elastic characteristics, they can have optimum characteristics for the seat back in the front-rear and left-right directions, and are required in the front-rear and left-right directions. Even when the frequency characteristics are different, it is possible to cope with them.
Specifically, the first support portion 41 and the second support portion 51 can be made of different materials. If the 1st support part 41 and the 2nd support part 51 are comprised with a mutually different material, a frequency characteristic can be freely set in front and back, and right and left.

Next, a second embodiment of the present invention will be described with reference to the drawings.
In FIG. 7, the first support portion 41 and the second support portion 51 are made of the same material, and have different thicknesses in the direction in which the support columns 33B are supported. Specifically, when the thickness of the first support portion 41 is T1, and the thickness of the second support portion 51 is T2, T1 <T2. In the figure, 61 and 61 are spacers.

  Since the 1st support part 41 and the 2nd support part 51 are comprised with the same material, material can be made shared and it can suppress the increase in material cost. In addition, since the first support portion 41 and the second support portion 51 have different thicknesses from each other in the direction of supporting the headrest support 33B, the headrest is front and rear and left and right while suppressing the material cost. It becomes possible to change the frequency characteristic of (reference numeral 14B in FIG. 1) to have an optimum frequency characteristic.

Next, Embodiment 3 of the present invention will be described with reference to the drawings.
In FIG. 8A, the first upper rear support piece 47C and the first lower rear support portion 48C are arranged with an interval (H21). Similarly, the first upper front support piece 45C and the first lower front support piece 46C are arranged at an interval (H21).
In FIG. 8B, the second upper left support piece 55C and the second lower left support side 56C are arranged with an interval (H22). Similarly, the second upper right support piece 57C and the second lower right support piece 58C are arranged with an interval (H22).
Here, a significant difference from FIG. 5 is that H21 <H22.

The 1st support part 41 and the 2nd support part 51 were made to support the support | pillar 33 in a mutually different height position. If it does so, it will become possible to change the frequency characteristic of front and back and right and left easily only by changing the height (H21) of the 1st support part 41, and the height (H22) of the 2nd support part 51.
Since the first support portion 41 supports the column 33C at a position vertically separated by the upper first support pieces 47C and 45C and the lower first support pieces 48C and 46C, the amplitude of the headrest in the front-rear direction Can be set. Since the amplitude of the headrest in the front-rear direction can be set, it is possible to set the amount of vibration reduction of the seat back.
Further, since the second support portion 51 can support the support column 33C at a position separated vertically by the upper second support pieces 55C and 57C and the lower second support pieces 56C and 58C, The headrest amplitude in the direction can be set. Since the amplitude of the headrest in the left-right direction can be set, it is possible to set the amount of vibration reduction of the seat back.
It should be noted that the thickness (α1) of the first support portion 41 and the thickness (α2) of the second support portion 51 may be changed.

Next, a fourth embodiment of the present invention will be described with reference to the drawings.
In FIG. 9, the first support portion 41 includes four upper and lower first elastic members 71 that support the column 33 via the column guide 32D at positions separated from each other at the upper and lower portions. The second support portion 51 includes upper and lower three-stage second elastic members 72 that support the support column 33 at positions spaced apart from each other in the upper portion and the lower portion.

  In the present embodiment, the number of the first support portions 41 is four and the number of the second support portions 51 is three. However, the number of each support portion can be changed. With such a configuration, the support column 33D can be supported at a position separated by the first plurality of elastic members 71 and the second plurality of elastic members 72, so the front and rear direction and the left and right direction can be supported. The amplitude of the headrest 14 can be set. Since the amplitude of the headrest 14 in the front-rear direction and the left-right direction can be set, the amount of vibration reduction of the seat back 12 can be set.

The height (Ha) of at least one elastic member 80 of the first plurality of elastic members 71... Is at least one elastic member 90 of the second plurality of elastic members 72. The column is supported at a height position different from the height (Hb).
Since at least one of the first plurality of elastic members 71... Supports the column at a height position different from at least one of the second plurality of elastic members 72. Different frequency characteristics can be given to the support portion in the front and rear and left and right.

Next, a fifth embodiment of the present invention will be described with reference to the drawings.
In FIG. 10, a headrest bracket 31 </ b> E is a rectangular tube having a rectangular cross section, and an inner wall 63 of the headrest bracket is filled with an elastic member 64, and a column guide 32 </ b> E is disposed inside the elastic member 64. Here, the thickness of the elastic member 64 is set so that the distance between the inner wall 63 of the headrest bracket and the outer peripheral surface 65 of the column guide is m in the front and rear directions and n in the left and right directions, respectively.
With such a structure, the frequency characteristic of the headrest 14 can be set with a single elastic member 64, and the number of components can be reduced.

Next, a sixth embodiment of the present invention will be described with reference to the drawings.
11A shows a perspective view of the support portion, and FIG. 11B shows a cross-sectional view of the main part of FIG. 11A. A significant difference from FIG. 2 is that the first support portion 41F and the second support portion 51F constituting the support portion 13F are arranged inside the headrest 14F. 75 and 75 are connecting members for connecting the upper horizontal bar 22F and the support 33F. The support 33F of the headrest is formed with a plurality of notches 77, and the headrest is fitted with a lock mechanism 78 provided on the connecting member 75. The vertical height of 14F can be changed.

  The first support portion 41F and the second support portion 51F are disposed inside the headrest 14F. A cavity 79 is formed inside the headrest 14F so that the headrest 14F can vibrate with respect to the column 33F. If inside the headrest 14F, compared to the case where the headrest and the support are supported by the support portion, the mass supported by the support portion 13F is constant, and the moment with respect to the seat back 12F hardly occurs. For this reason, even if the height of the headrest 14F is changed, the frequency characteristic of the headrest 14F does not change, so that a preset frequency characteristic can be obtained regardless of the height of the headrest 14F. That is, even if the height of the headrest 14F with respect to the seat back 12F is changed, the positional relationship between the support 33F and the first support part 41 and the second support part 51F as elastic members does not change, so that a preset frequency characteristic is obtained. be able to.

Next, a seventh embodiment of the present invention will be described with reference to the drawings.
In FIG. 12, the support portion 13G includes a cylindrical headrest bracket 31G through which the support 33G is inserted, and a first support portion 41G and a second support portion 51G are disposed along the inner peripheral edge 36G of the headrest bracket. The support 33G is supported by the inner peripheral edge of the first support part 41G and the inner peripheral edge of the second support part 51G.
Since the headrest column 33G is directly supported by the inner peripheral edges 81, 81 of the first support portion and the inner peripheral edges 82, 82 of the second support portion, an increase in the number of components can be suppressed.

  Although the present invention is applied to a four-wheeled vehicle in the embodiment, it can also be applied to a three-wheeled vehicle and can be applied to a general vehicle.

  The present invention is suitable for a four-wheeled vehicle having a seat provided with a headrest.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle seat, 11 ... Seat cushion, 12 ... Seat back, 13, 13G ... Support part, 14, 14F ... Headrest, 31, 31G ... Headrest bracket, 33, 33B, 33G ... Headrest support, 41, 41F, 41G ... first support part, 51, 51F, 51G ... second support part, 71 ... first elastic member, 72 ... second elastic member, 81 ... inner peripheral edge of the first support part, 82 ... first The inner periphery of 2 support parts.

Claims (9)

In a vehicle seat comprising a seat cushion, a seat back as a backrest raised at the rear of the seat cushion, and a headrest attached to the seat back via a support portion,
The vehicle includes a first support portion that elastically supports the headrest column in the front-rear direction, and a second support portion that elastically supports the headrest column in the left-right direction. Sheet.   The vehicle seat according to claim 1, wherein the first support portion and the second support portion have different elastic characteristics.   The vehicle seat according to claim 1 or 2, wherein the first support portion and the second support portion are made of different materials.   The said 1st support part and the said 2nd support part are comprised with the same material, and were made to mutually differ in the thickness in the direction which supports the said support | pillar. Item 3. The vehicle seat according to Item 2.   The vehicle seat according to claim 2, wherein the first support portion and the second support portion support the support column at different height positions.   The first support portion includes a first plurality of elastic members that support the support column at positions spaced apart from each other at an upper portion and a lower portion, and the second support portion is disposed at a position spaced from each other at an upper portion and a lower portion. The vehicle seat according to claim 1, further comprising a second plurality of elastic members that support the support column.   The at least one of the first plurality of elastic members supports the column at a height position different from that of at least one of the second plurality of elastic members. Vehicle seat.   The vehicle seat according to claim 1, wherein the first support portion and the second support portion are disposed inside the headrest.   The support portion includes a cylindrical headrest bracket through which the support column is inserted, and the first support portion and the second support portion are disposed along an inner peripheral edge of the headrest bracket. The vehicle seat according to claim 1, wherein the support column is supported by an inner peripheral edge of the support portion and an inner peripheral edge of the second support portion.

Images