JP2021079010A - Seat - Google Patents

Abstract

To provide a seat capable of reducing noise when a blower is driven in a state where a passenger whose body type is comparatively small is seated.SOLUTION: A seat 1 includes a seat back 100, a headrest 200, a blower 300, and an air amount adjustment member 400. The seat back 100 includes a back pad 120 and a headrest support 102. The back pad 120 includes a backrest surface air inlet/outlet 121h, a blower storage part 123, and a ventilation flow passage 124. The headrest 200 includes a headrest stay 210 and a headrest pad 220. The air amount adjustment member 400 is fixed to the headrest stay 210, so as to allow an air amount passing through the blower 300 in a first seated state to be smaller than an air amount passing through the blower 300 in a second seated state.SELECTED DRAWING: Figure 3

Description

The present invention relates to a sheet.

Conventionally, a seat provided with a blower provided in the seat back is known. For example, Japanese Patent Application Laid-Open No. 2009-125536 discloses an air-conditioning sheet including a seat cushion, a seat back, and a blowing means provided in the seat back. The seat back has a seat pad with a ventilation groove. The ventilation groove has a through groove penetrating in the thickness direction and a flat groove formed as a recess having a certain spread in the plane direction. The ventilation means is arranged on the back side of the seat pad and forms an air flow flowing through the ventilation groove.

Japanese Unexamined Patent Publication No. 2009-125536

In a seat as described in JP-A-2009-125536, when a occupant with a relatively small physique is seated on the seat, a through groove or a through groove is formed as compared with a state where an occupant with a relatively large physique is seated on the seat. Many of the plane grooves are not blocked by the occupants. Therefore, when the blower is driven with a occupant having a relatively small physique seated on the seat, the amount of air passing through the blower may increase, and as a result, noise may also increase.

An object of the present invention is to provide a seat capable of reducing noise when a blower is driven while a relatively small occupant is seated.

The seat according to one aspect of the present invention is connected to a seat back that supports the back of the occupant seated on the seat cushion constituting the seat and the upper end of the seat back, and supports the head of the occupant. A headrest is provided, a blower provided in the seat back, and an air volume adjusting member provided in the seat back and capable of adjusting the air volume passing through the blower, and the seat back is provided with a back pad. And a headrest support which is arranged at the upper end portion of the back pad and supports the headrest, and the back pad accommodates the backrest surface intake / exhaust port provided on the backrest surface and the blower. The headrest is supported by the headrest support, which connects the blower accommodating portion, the backrest surface intake / exhaust port, and the blower accommodating portion, and has a ventilation flow path through which the airflow formed by the blower flows. The headrest stay has a headrest stay and a headrest pad attached to the headrest stay, and the headrest stay has a low position where the distance between the headrest pad and the seat back is a first distance, and the headrest pad and the headrest pad. The air volume adjusting member is fixed to the headrest stay so that it can be displaced with respect to the headrest support between a high position where the distance from the seat back is a second distance larger than the first distance. In the first seated state where the occupant having a physique capable of covering a predetermined area of the opening area of the backrest surface intake / exhaust port is seated on the seat cushion and the headrest stay is in the low position. The amount of air passing through the blower is in a state where the occupant or an occupant having a physique capable of covering an area larger than the predetermined area of the opening area of the backrest surface intake / exhaust port is seated on the seat cushion. The amount of air passing through the blower in the second seated state where the headrest stay is in the high position is made smaller.

This seat is equipped with an air volume adjusting member that makes the air volume passing through the blower in the first seated state smaller than the air volume passing through the blower in the second seated state, so that when a relatively small occupant is seated. By setting the headrest to a low position, the amount of air passing through the blower is reduced. Therefore, the noise when the blower is driven with a relatively small occupant seated is reduced.

Further, the blower has an opening that communicates with the ventilation flow path and allows the airflow to pass through, and the air volume adjusting member measures the area of the opening of the blower when the headrest stay is in the low position. The area of the opening of the blower when the headrest stay is in the high position may be smaller than the area of the opening.

In this aspect, since the opening area of the blower accommodating portion in the first seated state is reduced, the amount of air passing through the blower in the first seated state is effectively reduced.

Further, it is preferable that the air volume adjusting member has a shape that extends downward from the headrest stay and blocks a part of the opening of the blower when the headrest stay is in the low position.

Further, the backrest surface intake / exhaust port is formed at a central opening formed at the center of the back pad in the width direction of the back pad and at a side portion of the back pad at the center opening in the width direction. The central opening, including a side opening, is at least one of the central openings when the occupant having a physique capable of covering the predetermined area of the back pad is seated on the seat cushion. The side opening is formed at a position where the portion is closed, and the side opening is the state in which the occupant having a physique capable of covering the predetermined fixed area of the back pad is seated on the seat cushion. The side opening is in a position where at least a part of the side opening is opened and the occupant having a physique capable of covering an area larger than the predetermined fixed area is seated on the seat cushion. The ventilation flow path is formed at a position where at least a part of the air is closed, and the ventilation flow path connects the central flow path connecting the central opening and the blower accommodating portion, and the side opening and the blower accommodating portion. In addition, the air volume adjusting member has a side flow path cut off from the central flow path, and in the first seated state, the central flow path and the blower accommodating portion are communicated with each other, and the blower accommodating portion is communicated with each other. The communication between the side flow path and the blower accommodating portion may be cut off, and the side flow path and the blower accommodating portion may be communicated with each other in the second seated state.

In this aspect, in the first seated state, at least a part of the central opening is blocked by the occupant, and the communication between the side flow path and the blower accommodating portion is blocked by the air volume adjusting member. Noise is reduced when the blower is driven with a small occupant seated.

As described above, according to the present invention, it is possible to provide a seat capable of reducing noise when the blower is driven while a occupant having a relatively small physique is seated.

It is an exploded perspective view which shows typically the sheet of 1st Embodiment of this invention. It is a rear view of the sheet shown in FIG. FIG. 2 is a cross-sectional view taken along the line III-III in FIG. FIG. 3 is an enlarged view of the range shown by the solid line IV in FIG. It is a front view which shows the state which the headrest is a low position in the seat of the 2nd Embodiment of this invention. It is a front view which shows the state which the headrest is a high position in the seat of the 2nd Embodiment of this invention. It is a front view which shows the modification of the air volume adjusting member of 2nd Embodiment.

Embodiments of the present invention will be described with reference to the drawings. In the drawings referred to below, the same or corresponding members are given the same number.

(First Embodiment)
FIG. 1 is an exploded perspective view schematically showing a sheet according to a first embodiment of the present invention. FIG. 2 is a rear view of the sheet shown in FIG. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. FIG. 4 is an enlarged view of the range shown by the solid line IV in FIG.

As shown in FIGS. 1 to 4, the seat 1 of the present embodiment includes a seat back 100, a headrest 200, a blower 300, and an air volume adjusting member 400. Although omitted in each drawing, the seat 1 includes a seat cushion that constitutes a seat portion. The seat 1 functions as a vehicle seat, particularly a vehicle seat. In addition, in FIG. 1, the illustration of the air volume adjusting member 400 is omitted.

The seat back 100 supports the back of the occupant seated on the seat cushion. The seat back 100 has a headrest support 102 and a back pad 120.

The headrest support 102 is a portion that supports the headrest 200. The headrest support 102 is provided at the upper end of a back frame (not shown) that forms the skeleton of the seat back 100.

The back pad 120 is a member that elastically supports the back of the occupant and is fixed to the back frame. The back pad 120 is made of urethane or the like. The upper end of the back pad 120 is provided with an opening for exposing the headrest support 102.

The back pad 120 has a backrest surface 121, a blower accommodating portion 123, and a ventilation flow path 124.

The backrest surface 121 is provided with a backrest surface intake / exhaust port 121h.

The blower accommodating unit 123 is a portion accommodating the blower 300. The blower accommodating portion 123 is formed on the back side (right side in FIG. 3) of the back pad 120. The blower accommodating portion 123 is open toward the backrest surface 121.

The ventilation flow path 124 connects the backrest surface intake / exhaust port 121h and the blower accommodating portion 123. The airflow formed by the blower 300 flows through the ventilation flow path 124.

The cover 130 covers the back pad 120. In FIG. 2, the cover 130 is not shown. As shown in FIG. 3, the sheet 1 may have a back cover 135 that covers the back side of the back pad 120.

The regulation film 140 is arranged on the back side of the back pad 120. Specifically, the regulation film 140 is arranged between the back pad 120 and the blower 300. The regulation film 140 regulates the airflow discharged from the blower 300 from merging with the airflow from the backrest surface intake / exhaust port 121h to the blower 300 via the ventilation flow path 124. The regulation film 140 is made of a non-woven fabric, felt or the like.

As shown in FIGS. 3 and 4, a heater 150 may be arranged between the backrest surface 121 and the cover 130. The heater 150 heats the back pad 120 or the cover 130. The heater 150 is formed in a sheet shape. The heater 150 is provided with a hole through which the airflow formed by the blower 300 passes.

The headrest 200 is provided on the upper part of the seat back 100 and receives the head of the occupant. The headrest 200 has a headrest stay 210 and a headrest pad 220.

The headrest stay 210 forms a skeleton of the headrest 200. The headrest stay 210 is supported by the headrest support 102. The headrest stay 210 has a shape extending in the vertical direction.

The headrest pad 220 is fixed to the headrest stay 210. The headrest pad 220 is made of urethane or the like.

The headrest stay 210 is displaceable with respect to the headrest support 102 between the low position and the high position. The low position (position shown in FIG. 3) is a position where the distance between the headrest pad 220 and the seat back 100 is the first distance. The high position is a position where the distance between the headrest pad 220 and the seat back 100 is a second distance larger than the first distance.

The blower 300 is arranged in the blower accommodating portion 123. The blower 300 has an opening 300h through which the airflow formed by driving the blower 300 passes. As shown in FIGS. 3 and 4, the blower 300 is arranged so that its opening 300h communicates with the ventilation flow path 124. Specifically, the blower 300 is arranged so that the opening 300h faces the backrest surface 121 side (left side in FIGS. 3 and 4). In the present embodiment, the blower 300 generates an air flow from the backrest surface intake / exhaust port 121h toward the back side of the back pad 120. However, the blower 300 may generate an air flow from the back surface side of the back pad 120 toward the backrest surface intake / exhaust port 121h.

The air volume adjusting member 400 is fixed to the headrest stay 210. The air volume adjusting member 400 makes the air volume passing through the blower 300 in the first seated state smaller than the air volume passing through the blower 300 in the second seated state.

The first seated state is a state in which an occupant having a physique capable of covering a predetermined area of the opening area of the backrest surface intake / exhaust port 121h (hereinafter referred to as "small occupant") is seated on the seat cushion. In addition, the headrest stay 210 is in the low position.

The second seated state is a small occupant or an occupant having a physique capable of covering an area larger than the predetermined area of the opening area of the backrest surface intake / exhaust port 121h (hereinafter referred to as "large occupant"). ) Is seated on the seat cushion, and the headrest stay 210 is in the high position.

In the present embodiment, the air volume adjusting member 400 refers to the area of the opening 300h of the blower 300 when the headrest stay 210 is in the low position, and the area of the opening 300h of the blower 300 when the headrest stay 210 is in the high position. Also make it smaller. As a result, the amount of air passing through the blower 300 in the first seated state becomes smaller than the amount of air passing through the blower 300 in the second seated state.

Specifically, the air volume adjusting member 400 has a shape extending downward from the headrest stay 210. The air volume adjusting member 400 is formed in a flat plate shape. As shown in FIG. 4, the air volume adjusting member 400 has a blocking portion 410 that shuts off a part of the opening 300h of the blower 300 when the headrest stay 210 is in the low position. The blocking portion 410 is formed at the lower end portion of the air volume adjusting member 400. The blocking unit 410 opens the entire opening 300h of the blower 300 when the headrest stay 210 is in the high position. The air volume adjusting member 400 is arranged between the regulation film 140 and the blower 300. In FIG. 4, the air volume adjusting member 400 when the headrest stay 210 is in the high position is shown by a solid line, and the air volume adjusting member 400 when the headrest stay 210 is in the low position is shown by a alternate long and short dash line. ..

As described above, the seat 1 of the present embodiment includes the air volume adjusting member 400 that makes the air volume passing through the blower 300 in the first seated state smaller than the air volume passing through the blower 300 in the second seated state. Therefore, by setting the headrest 200 to a low position when a relatively small occupant is seated, the amount of air passing through the blower 300 is reduced. Therefore, the noise when the blower 300 is driven with a relatively small occupant seated is reduced.

(Second Embodiment)
Next, Sheet 1 of the second embodiment of the present invention will be described with reference to FIGS. 5 and 6. In addition, in FIG. 5, the small occupant is shown by a two-dot chain line, and in FIG. 6, the large occupant is shown by a two-dot chain line. Further, in the second embodiment, only the parts different from those in the first embodiment will be described, and the description of the same structure, action and effect as in the first embodiment will not be repeated.

In the present embodiment, the backrest surface intake / exhaust port 121h has a central opening Ch and a side opening Sh.

The central opening Ch is an opening formed in the central portion of the back pad 120 in the width direction of the back pad 120 (horizontal direction in FIGS. 5 and 6). As shown in FIG. 5, the central opening Ch is formed at a position in the back pad 120 where at least a part of the central opening Ch is blocked by the small occupant seated on the seat cushion.

The side opening Sh is an opening formed on the side of the central opening Ch in the width direction of the back pad 120. As shown in FIGS. 5 and 6, the side opening Sh is a position in the back pad 120 at a position where at least a part of the side opening Sh is opened when the small occupant is seated on the seat cushion. Moreover, it is formed at a position where at least a part of the side opening Sh is closed by the large occupant seated on the seat cushion.

The ventilation flow path 124 has a central flow path 124C and a side flow path 124S. The central flow path 124C connects the central opening Ch and the blower accommodating portion 123. The side flow path 124S connects the side opening Sh and the blower accommodating portion 123. The side flow path 124S is cut off from the central flow path 124C.

As shown in FIG. 5, the air volume adjusting member 400 communicates the central flow path 124C and the blower accommodating portion 123 in a state where the headrest 200 is in a low position, and also communicates with the side flow path 124S and the blower accommodating portion 123. Block the communication. Therefore, when the blower 300 is driven in the first seated state, the airflow formed by the blower 300 flows only in the central flow path 124C. In FIG. 5, the central flow path 124C, which is the flow path through which the air flow flows, is shaded.

On the other hand, as shown in FIG. 6, the air volume adjusting member 400 communicates the side flow path 124S with the blower accommodating portion 123 in a state where the headrest 200 is in a high position. In the present embodiment, the air volume adjusting member 400 also communicates between the central flow path 124C and the blower accommodating portion 123 in a state where the headrest 200 is in a high position. In FIG. 6, the central flow path 124C and the side flow path 124S, which are the flow paths through which the air flow flows, are shaded.

As described above, in the first seated state, at least a part of the central opening Ch is blocked by the occupant, and the side flow path 124S and the blower accommodating portion 123 are formed by the air volume adjusting member 400. Communication is cut off. Therefore, the noise when the blower 300 is driven in the first seated state (the state in which the petite occupant is seated and the headrest 200 is in the low position) is the second seated state (the petite occupant). Is seated and the headrest 200 is in a high position), the noise is smaller than the noise when the blower 300 is driven.

Further, in this aspect, since the intake air is taken from the position of the backrest surface intake / exhaust port 121h according to the physique of the occupant, the occupant's feeling of coldness is improved.

It should be noted that the embodiments disclosed this time are examples in all respects and should not be considered to be restrictive. The scope of the present invention is shown by the scope of claims rather than the description of the above-described embodiment, and further includes all modifications within the meaning and scope equivalent to the scope of claims.

For example, in the second embodiment, as shown in FIG. 7, the air volume adjusting member 400 has a through hole for communicating the side flow path 124S and the blower accommodating portion 123 in a state where the headrest 200 is in a high position. The 400h is provided, and the blocking section 410 may block the communication between the central flow path 124C and the blower accommodating section 123 in a state where the headrest 200 is in a high position. In this case, the through hole 400h of the air volume adjusting member 400 communicates the central flow path 124C and the blower accommodating portion 123 when the headrest 200 is in the low position.

1 seat, 100 seat back, 102 headrest support, 120 back pad, 121 backrest surface, 121h backrest surface intake / exhaust port, 123 blower housing, 124 ventilation flow path 124, 124C central flow path, 124S side flow path, 130 cover , 135 back cover, 140 regulation membrane, 150 heater, 200 headrest, 210 headrest stay, 220 headrest pad, 300 blower, 300h opening, 400 air volume adjustment member, 400h through hole, 410 blocking part, Ch center opening, Sh side opening ..

Claims (4)

A seat back that supports the back of the occupant seated on the seat cushion that constitutes the seat, and
A headrest that is connected to the upper end of the seat back and supports the occupant's head,
The blower provided in the seat back and
It is provided in the seat back and includes an air volume adjusting member capable of adjusting the air volume passing through the blower.
The seat back
Back pad and
It is arranged at the upper end of the back pad and has a headrest support that supports the headrest.
The back pad
The backrest surface intake / exhaust port provided on the backrest surface,
A blower accommodating unit for accommodating the blower and
The backrest surface intake / exhaust port is connected to the blower accommodating portion, and has a ventilation flow path through which the airflow formed by the blower flows.
The headrest
The headrest stay supported by the headrest support and
With a headrest pad attached to the headrest stay,
The headrest stay is a low position where the distance between the headrest pad and the seat back is a first distance, and a high position where the distance between the headrest pad and the seat back is a second distance larger than the first distance. Can be displaced with respect to the headrest support between
The air volume adjusting member is fixed to the headrest stay, and an occupant having a physique capable of covering a predetermined area of the opening area of the backrest surface intake / exhaust port is seated on the seat cushion and said. The amount of air passing through the blower in the first seated state where the headrest stay is in the low position can cover an area larger than the predetermined area of the opening area of the occupant or the backrest surface intake / exhaust port. A seat in which an occupant having a physique is seated on the seat cushion and the headrest stay is in the second seated state at the high position, the air volume is smaller than the air volume passing through the blower. The blower has an opening that communicates with the ventilation flow path and allows the airflow to pass through.
The air volume adjusting member claims that the area of the opening of the blower when the headrest stay is in the low position is smaller than the area of the opening of the blower when the headrest stay is in the high position. Item 1. The sheet according to item 1. The sheet according to claim 2, wherein the air volume adjusting member has a shape extending downward from the headrest stay and blocking a part of the opening of the blower when the headrest stay is in the low position. The backrest surface intake / exhaust port is
A central opening formed in the central portion of the back pad in the width direction of the back pad,
The back pad includes a side opening formed on the side of the central opening in the width direction.
The central opening is formed at a position where at least a part of the central opening is closed when the occupant having a physique capable of covering the predetermined area of the back pad is seated on the seat cushion. Has been
The side opening is a position where at least a part of the side opening is opened when the occupant having a physique capable of covering the predetermined area of the back pad is seated on the seat cushion. It is formed at a position where at least a part of the side opening is closed when the occupant having a physique capable of covering an area larger than the predetermined fixed area is seated on the seat cushion. And
The ventilation flow path is
A central flow path connecting the central opening and the blower accommodating portion,
It has a side flow path that connects the side opening and the blower accommodating portion and is cut off from the central flow path.
In the first seated state, the air volume adjusting member communicates the central flow path and the blower accommodating portion, and blocks the communication between the side flow path and the blower accommodating portion, so that the second seated state. The sheet according to claim 1, wherein the side flow path and the blower accommodating portion communicate with each other.

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