DE102021116569A1 - Seat with vibration devices - Google Patents

Abstract

The invention relates to a vehicle seat (10) which includes a seat surface (20) and a backrest (30), the seat (10) further including at least one vibration device (50). The vibratory device or devices (50) are located in one or more of the following allowable spaces: - a first allowable space (EA1) in the backrest (30) defined by predefined areas; - a second allowable space (EA2) in the seat bottom (20) defined by predefined areas; these areas being defined with respect to an orthonormal coordinate system (H, x, y, z), the starting point of which is the point H, which is the reference point of the seat (10), the x-axis of which extends horizontally from the back to the front of the seat bottom (20 ) whose y-axis extends horizontally from right to left of the seat, and whose z-axis extends vertically from bottom to top of the backrest (30).

Description

The present invention relates to a vehicle seat that includes a seat bottom with a top and a backrest with a front, the top and the front being intended to come into contact with an occupant seated on the seat, this seat further having at least one Vibration device includes.

Vehicle seats are known which incorporate vibration devices which are integrated into a seat in order to transmit vibrations to the occupant sitting on the seat. These vibrations are generated by the vibrator of the vibration device. The transmission of these vibrations to the occupant can serve various purposes, such as the comfort of the occupant or a warning to the occupant to prevent a hazard outside the vehicle.

Depending on the position of the vibration devices in the seat, the vibrations generated by them can cause discomfort in the occupant or even have a negative effect on health at certain vibration frequencies.

Description of the invention

The present invention aims to eliminate these disadvantages.

The invention aims to propose a vehicle seat in which the vibration device(s) is (are) arranged in such a way as to generate a minimum level of discomfort for the occupant, or no discomfort at all.

• - einem ersten zulässigen Raum (EA1) in der Rückenlehne, der durch die folgenden Bereiche definiert ist: $$\text{Y}1\text{min}<\left|\text{Y}\right|<\text{Y}1\text{max mit Y}1\text{min}=0\text{ mm und Y}1\text{max}=150\text{ mm},$$
  
  $$\text{Z}1\text{min}<\text{Z}<\text{Z}1\text{max mit Z}1\text{min}=40\text{ mm und Z}1\text{max}=\text{unendlich},$$
  
  |X| > |X_D| + L1 mit L1 = 25 mm, wobei XD die x-Koordinate des Punktes D der Vorderseite 31 der Rückenlehne 30 von Koordinaten Y und Z ist;
• - einem zweiten zulässigen Raum (EA2) in der Sitzfläche, der durch die folgenden Bereiche definiert ist: $$\text{X}>\text{X}2\text{min mit X}2\text{min}=100\text{ mm},$$
  
  |Z| > |ZA| + L2 mit L2 = 25 mm, wobei ZA die z-Koordinate des Punktes A der Oberseite der Sitzfläche von Koordinaten X und Y ist;

wobei die Werte X, Y und Z die Koordinaten eines Punktes P des zulässigen Raumes sind, wobei diese Koordinaten bezüglich eines orthonormierten Koordinatensystems (H, x, y, z) definiert sind, dessen Ausgangspunkt der Punkt H ist, welcher der Bezugspunkt des Sitzes ist, dessen x-Achse sich horizontal von hinten nach vorne der Sitzfläche erstreckt, dessen y-Achse sich horizontal von rechts nach links des Sitzes erstreckt, und dessen z-Achse sich somit vertikal von unten nach oben der Rückenlehne erstreckt.This objective is achieved thanks to the fact that the vibrating device(s) is (are) placed in one or more of the following allowed spaces:

• - a first allowable space (EA1) in the seat back, defined by the following areas: $$\text{Y}1\text{at least}<\left|\text{Y}\right|<\text{Y}1\text{max with Y}1\text{at least}=0\text{mm and y}1\text{Max}=150\text{mm},$$
  
  $$\text{Z}1\text{at least}<\text{Z}<\text{Z}1\text{max with Z}1\text{at least}=40\text{mm and z}1\text{Max}=\text{infinite},$$
  
  |X| > |X _D | + L1 with L1 = 25 mm, where XD is the x-coordinate of the point D of the front 31 of the backrest 30 from coordinates Y and Z;
• - a second allowable space (EA2) in the seat base defined by the following areas: $$\text{X}>\text{X}2\text{min with X}2\text{at least}=100\text{mm},$$
  
  |Z| > |ZA| + L2 with L2 = 25 mm, where ZA is the z-coordinate of the point A of the top of the seat of coordinates X and Y;

where the values X, Y and Z are the coordinates of a point P of the permissible space, these coordinates being defined with respect to an orthonormal coordinate system (H, x, y, z) whose starting point is the point H, which is the reference point of the seat whose x-axis extends horizontally from back to front of the seat, whose y-axis extends horizontally from right to left of the seat, and whose z-axis thus extends vertically from bottom to top of the backrest.

Thanks to these dispositions, the vibrations of the vibration device(s) do not have a detrimental effect on the occupant's health. In particular, the vibrating devices are not placed a priori close to organs susceptible to the vibrations, in particular the lungs and genitals.

• - einem ersten verbotenen Raum (EI1) in der Rückenlehne, der durch die folgenden Bereiche definiert ist: $$\left|\text{Y}\right|<\text{Y}11\text{max mit Y}11\text{max}=30\text{ mm},$$
  
  $$\text{Z}>0$$
  
• - einem zweiten verbotenen Raum (EI2) in der Sitzfläche und der Rückenlehne, der durch die folgenden Bereiche definiert ist: $$\text{X}12\text{min}<\text{X}<\text{X}12\text{max mit X}12\text{min}=-100\text{ mm und X}12\text{max}=140\text{ mm},$$
  
  $$\text{Z}<\text{Z}12\text{max mit Z}12\text{max}=40\text{ mm},$$
  
• - einem dritten verbotenen Raum (EI3) in der Sitzfläche und der Rückenlehne, der durch die folgenden Bereiche definiert ist: $$\text{X}<\text{X}13\text{max mit X}13\text{max}=165\text{ mm},$$
  
  $$\left|\text{Y}\right|<\text{Y}13\text{max mit Y}13\text{max}=40\text{ mm},$$
  
  $$\text{Z}<\text{Z}13\text{max mit Z}13\text{max}=40\text{ mm}.$$
  

Advantageously, none of the vibrating device(s) is located in any of the following prohibited spaces:

• - a first prohibited space (EI1) in the seat back, defined by the following areas: $$\left|\text{Y}\right|<\text{Y}11\text{max with Y}11\text{Max}=30\text{mm},$$
  
  $$\text{Z}>0$$
  
• - a second forbidden space (EI2) in the seat cushion and backrest, defined by the following areas: $$\text{X}12\text{at least}<\text{X}<\text{X}12\text{max with X}12\text{at least}=-100\text{mm and x}12\text{Max}=140\text{mm},$$
  
  $$\text{Z}<\text{Z}12\text{max with Z}12\text{Max}=40\text{mm},$$
  
• - a third forbidden space (EI3) in the seat cushion and backrest, defined by the following areas: $$\text{X}<\text{X}13\text{max with X}13\text{Max}=165\text{mm},$$
  
  $$\left|\text{Y}\right|<\text{Y}13\text{max with Y}13\text{Max}=40\text{mm},$$
  
  $$\text{Z}<\text{Z}13\text{max with Z}13\text{Max}=40\text{mm}.$$
  

Thus, the most sensitive areas of the body, corresponding to the upper body, where the lungs and heart are located, and the core of the body, are exposed to the vibrations as little as possible, with the result that there is no discomfort or adverse health impact for the person on the Seat seated occupants are recorded.

Advantageously, Y1min = 30mm, Z1max = 200mm, and X2min = 165mm.

Thus, the permissible zones are less extensive, which means that the undesirable vibrations in the zones of the body that are to be protected from vibrations are reduced.

Advantageously, the allowable spaces of the seat further include a third allowable space consisting of the armrests, the sides of the backrest intended to support the shoulders of a seat occupant, and the footrests of the seat.

The vibrations of the vibration devices can thus be perceived by other zones of the body, which has a positive effect on the occupant.

• [1] Die 1 eine perspektivische Ansicht eines erfindungsgemäßen Sitzes ist,
• [2] Die 2 eine Vorderansicht des Sitzes der 1 ist,
• [3] Die 3 eine Draufsicht des Sitzes der 1 ist,
• [4] Die 4 eine Schnittansicht gemäß der Ebene IV-IV der 3 ist.

The invention will be better understood from reading the following detailed description of embodiments, as well as its advantages, given by way of non-limiting example. The description refers to the attached drawings, in which:

• [ 1 ] The 1 is a perspective view of a seat according to the invention,
• [ 2 ] The 2 a front view of the seat 1 is,
• [ 3 ] The 3 a plan view of the seat of the 1 is,
• [ 4 ] The 4 a sectional view according to the plane IV-IV of 3 is.

Detailed description of the invention

A seat 10 of a vehicle includes, as in 1 1, which is a perspective view of a seat 10, a seat bottom 20, and a backrest 30. The "front-to-back" direction is defined in the direction of the seat bottom 20 with respect to an occupant normally seated in the seat, with that occupant facing looks ahead, the back of the occupant is thus rearward facing. The left and right sides of the seat are also defined with respect to such an occupant, with the left (respectively right) side of the seat 10 being the left (respectively right) side of the occupant. The direction from "top to bottom" is defined in the direction of the backrest 30 such that the bottom is in the area of the connection between the backrest 30 and the seat 20 and the top is the highest point of the backrest 30 .

The seat bottom 20 has a top surface 21 and the backrest 30 has a front surface 31, the top surface 21 and the front surface 31 being intended to be in contact with the buttocks/legs and back of an occupant seated on the seat 10, respectively be.

An orthonormal coordinate system (Hxyz) with respect to the seat 10 is defined as follows: the starting point H is the "reference point of the seat" 10, the so-called "H point", the x-axis extends horizontally from the back to the front of the seat surface 20, the y-axis extends horizontally (transversely) from right to left of the seat, the z-axis extends vertically from bottom to top of the backrest 30.

The "seating reference point" is defined by standard across the automotive industry as the pivot point between the torso and legs (thighs) of a SAEJ-826 referenced dummy seated on the seat.

In the present description, the values X, Y and Z are the coordinates of a point M, defined in the coordinate system (Hxyz) and expressed in millimeters (mm). These values can be negative or positive depending on the position of the M point.

The seat 10 includes one or more vibration devices 50 that are integrated into the seat bottom 20 and/or the backrest 30 of the seat 10 .

Experiments performed by the inventors with occupants of various statures and heights seated in a seat 10 show that when the vibrating devices 50 are placed in certain zones of the seat 10, called “allowable spaces” (EA), an occupant no Discomfort and no annoyance due to vibrations generated by the vibrating devices 50 perceives. The vibrating devices 50 should thus ideally be placed in the allowable spaces EA.

These tests also indicate that, on the contrary, when the vibration devices 50 are placed in certain zones of the seat 10, the so-called "forbidden spaces" (EI), an occupant perceives an annoyance. In addition, the vibrations of the vibrating devices 50 can adversely affect the occupant's health, since they allow resonances to penetrate the occupant's vital organs (heart, lungs, genitals...). Thus, the vibrating devices 50 must not be placed in the forbidden spaces EI.

In the following description, the notation ITI means by default the absolute value of T, i.e. ITI = T if T> 0 and ITI = -T if T< 0.
The admissible spaces EA are now described and quantified.

$$\text{Z}1\text{min}<\text{Z}<\text{Z}1\text{max mit Z}1\text{min}=40\text{ mm und Z}1\text{max}=\text{unendlich},$$

|X| > |X_D| + L1 mit L1 = 25 mm, wobei XD x-Koordinate des Punktes D der Vorderseite 31 der Rückenlehne 30 von Koordinaten Y und Z ist.A first allowable space EA1 located in the backrest 30 is defined by the following ranges: $$\text{Y}1\text{at least}<\left|\text{Y}\right|<\text{Y}1\text{max with Y}1\text{at least}=0\text{mm and y}1\text{Max}=150\text{mm},$$

$$\text{Z}1\text{at least}<\text{Z}<\text{Z}1\text{max with Z}1\text{at least}=40\text{mm and z}1\text{Max}=\text{infinite},$$

|X| > |X _D | + L1 with L1 = 25 mm, where XD is x-coordinate of point D of the front 31 of the backrest 30 of coordinates Y and Z.

In a restrictive variant, the permissible space EA1 is limited to the values Y1 min = 30 mm and Z1 max = 200 mm. In this variant, on the one hand, the middle zone of the backrest 31, namely the band around the z-axis whose width is equal to {2*Y1min}=60 mm, is removed from the permissible space EA1. This central zone corresponds to that part of the seat back 31 against which the occupant's spine rests. On the other hand, the upper portion of the backrest 31, namely above Z1max = 200mm, is removed from the allowable space EA1. This upper section corresponds to the part of the backrest against which the occupant's lungs rest. the 2 12 is a front view of the seat 10 and shows the allowable space EA1 in the case of this restrictive variant. This allowable space EA1 is also in the 1 and in the 4 to see. By way of example, four vibration devices 50 are arranged in the seat 10 (two in the backrest 30 and two in the seat bottom 20) and are shown in these figures. The vibrating devices 50 are arranged symmetrically with respect to the plane (x, z).

the 4 shows the relative position of a point P of the legal space of coordinates X, Y, Z, and a point D of coordinates XD, Y, Z. The point D is the projection onto the face 31 and along the direction x of the point P. Thus means the condition |X| > |X _D | + L1 that the point P behind the backrest 30 is at a distance from the front 31 at least equal to L1. The points P that satisfy this condition are in the 4 in the gray zone of the backrest 31.

• X > X2min mit X2min = 100 mm,
• |Z| > |Z_A| + L2 mit L2 = 25 mm, wobei Z_A die z-Koordinate des Punktes A der Oberseite 21 der Sitzfläche 20 von Koordinaten X und Y ist.

A second allowable space EA2 located in the seat bottom 20 is defined by the following ranges:

• X > X2min with X2min = 100mm,
• |Z| > |Z _A | + L2 with L2 = 25 mm, where Z _A is the z-coordinate of point A of the top 21 of the seat 20 of coordinates X and Y.

In a restrictive variant, the permissible space EA2 is limited to the value X2min = 165 mm. In this variant, a portion located further back on the seat surface 21, namely between X2min=100mm and X2min=165mm, is removed from the allowable space EA2. This portion corresponds to the portion of the seat bottom 20 closest to the occupant's genitals. the 3 12 is a plan view of the seat 10 and shows the allowable space EA2 in the case of restrictive variant. This allowed space EA2 is also in the 1 and in the 4 to see.

the 4 shows the relative position of a point P of the feasible space of coordinates X, Y, Z, and a point A of coordinates X, Y, Z _A . The point A is the projection onto the top 21 and along the direction z of the point P. Thus the condition means |Z| > |Z _A | + L2 that the point P under the seat 20 is at a distance from the top 21 of at least equal to L2. The points P that satisfy this condition are in the 4 in the gray zone of the seat 21.

The forbidden spaces EI are now described and quantified.

$$\text{Z}>0.$$

A first forbidden space EI1 located in the seat back 30 is defined by the following areas: $$\left|\text{Y}\right|<\text{Y}11\text{max with Y}11\text{Max}=30\text{mm},$$

$$\text{Z}>0$$

This forbidden space EI1 corresponds to a central zone of the backrest 30, which is a band around the z axis whose width is equal to {2*Y11max}=60 mm. This central zone corresponds to that part of the seat back 30 against which the occupant's spine rests. In fact, it is preferable that the vibrators 50 are not located in this zone. This forbidden room EI1 is in the 2 to see.

$$\text{Z}<\text{Z}12\text{max mit Z}12\text{max}=40\text{ mm}\text{.}$$

A second forbidden space EI2 located in the seat bottom 20 and the backrest 30 is defined by the following areas: $$\text{X}12\text{at least}<\text{X}<\text{X}12\text{max with X}12\text{at least}=-100\text{mm and x}12\text{Max}=140\text{mm},$$

$$\text{Z}<\text{Z}12\text{max with Z}12\text{Max}=40\text{mm}\text{.}$$

This forbidden space EI2 corresponds to a zone of the seat 10 that extends over the entire width of the seat 10, on the one hand behind the point H at a distance of X12min and in front of the point H at a distance of X12max, and on the other hand below a height Z12max extends. This zone corresponds to that part of the seat 10 against which the center of the occupant's body rests. In fact, it is preferable that the vibration devices 50 are not located in this zone, which includes the bones and the central organs of the body. This forbidden room EI2 is in the 2 and in the 3 to see.

$$\left|\text{Y}\right|<\text{Y}13\text{max mit Y}13\text{max}=40\text{ mm},$$

$$\text{Z}<\text{Z}13\text{max mit Z}13\text{max}=40\text{ mm}.$$

A third forbidden space EI3, located in the seat bottom 20 and the backrest 30, is defined by the following areas: $$\text{X}<\text{X}13\text{max with X}13\text{Max}=165\text{mm},$$

$$\left|\text{Y}\right|<\text{Y}13\text{max with Y}13\text{Max}=40\text{mm},$$

$$\text{Z}<\text{Z}13\text{max with Z}13\text{Max}=40\text{mm}.$$

This forbidden space EI3 corresponds to a zone of the seat 10 which on the one hand extends along a band around the x axis behind X13max and over a width equal to {2 Y13max}=80 mm and on the other hand extends below a height of Z13max. This zone corresponds to the part of the seat 10 against which the occupant's genitals rest. In fact, it is preferable that the vibrators 50 are not located in this zone. This forbidden room EI3 is in the 2 and in the 3 to see.

According to a variant of the invention, the permissible spaces of the seat 10 further include a third permissible space consisting of the armrests, the sides of the backrest 30 intended to support the shoulders of an occupant of the seat 10, and the footrests of the seat 10 exists when such footrests are present.

According to a variant of the invention, the vibrating devices 50 are placed exclusively in one or more of the permissible spaces EA defined above.

Claims (4)

A vehicle seat (10) including a seat bottom (20) having a top (21), and a backrest (30) having a front (31), the top (21) and front (31) being intended to be in contact with an occupant seated on the seat (10), the seat (10) further including at least one vibrating device (50), the seat (10) being characterized in that the at least one vibrating device (50) is in one or more of the following allowed spaces: - a first allowed space (EA1) in the backrest (30) defined by the following areas: $$\text{Y}1\text{at least}<\left|\text{Y}\right|<\text{Y}1\text{max with Y}1\text{at least}=0\text{mm and y}1\text{Max}=150\text{mm},$$

$$\text{Z}1\text{at least}<\text{Z}<\text{Z}1\text{max with Z}1\text{at least}=40\text{mm and z}1\text{Max}=\text{infinite},$$

|X| > |X _D | + L1 with L1 = 25 mm, where X _D is the x-coordinate of the point D of the front (31) of the backrest (30) from coordinates Y and Z; - a second allowable space (EA2) in the seat bottom (20) defined by the following areas: $$\text{X}>\text{X}2\text{min with X}2\text{at least}=100\text{mm},$$

|Z| > |Z _A | + L2 with L2 = 25 mm, where Z _A is the z-coordinate of point A of the top (21) of the seat (20) from coordinates X and Y; where the values X, Y and Z are the coordinates of a point P of the permissible space, these coordinates being defined with respect to an orthonormal coordinate system (H, x, y, z) whose starting point is the point H, which is the reference point of the seat ( 10) whose x-axis extends horizontally from the rear to the front of the seat bottom (20), whose y-axis extends horizontally from the right to the left of the seat, and whose z-axis extends vertically from the bottom to the top of the Backrest (30) extends. Vehicle seat (10) after claim 1 , characterized in that none of the at least one vibrating device (50) is arranged in one of the following forbidden spaces: - a first forbidden space (EI1) in the backrest (30), which is defined by the following areas: $$\left|\text{Y}\right|<\text{Y}11\text{max with Y}11\text{Max}=30\text{mm},$$

$$\text{Z}>0$$

- a second forbidden space (EI2) in the seat cushion (20) and the backrest (30), defined by the following areas: $$\text{X}12\text{at least}<\text{X}<\text{X}12\text{max with X}12\text{at least}=-100\text{mm and x}12\text{Max}=140\text{mm},$$

$$\text{Z}<\text{Z}12\text{max with Z}12\text{Max}=40\text{mm},$$

- a third forbidden space (EI3) in the seat cushion (20) and the backrest (30), defined by the following areas: $$\text{X}<\text{X}13\text{max with X}13\text{Max}=165\text{mm},$$

$$\left|\text{Y}\right|<\text{Y}13\text{max with Y}13\text{Max}=40\text{mm},$$

$$\text{Z}<\text{Z}13\text{max with Z}13\text{Max}=40\text{mm}.$$

Vehicle seat (10) after claim 1 or 2 , characterized in that Y1min = 30 mm, Z1max = 200 mm, and X2min = 165 mm. Vehicle seat (10) according to one of Claims 1 until 3 , characterized in that the permitted spaces of the seat (10) further include a third permitted space consisting of the armrests, the sides of the backrest (30) intended to support the shoulders of an occupant of the seat (10), and the footrests of the seat (10).

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