KR20220121286A - Skin of interior material for vehicle - Google Patents

Abstract

Disclosed is a skin of an interior material for a vehicle. The skin of an interior material for a vehicle of the present invention is attached to the front surface of the interior material of a vehicle. The interior material has a groove, which is ruptured by expansion pressure of an airbag. The skin includes: an exposure part which is exposed to the vehicle interior; and an interior part which is attached to a rear surface of the exposure part. The interior part includes: a rupture part which is interposed between the exposure part and the interior material in front of the groove; and an attachment part which is formed integrally with the rupture part and interposed between the exposure part and the interior material except for the front of the groove. The rupture part forms tensile strength which is smaller than that of the attachment part to be ruptured by the expansion pressure of the airbag. Accordingly, the present invention does not need additional installation of mechanical devices, such as an actuator, on a production line, does not cause thermal deformation during a manufacturing process, and can accurately rupture a target portion by expansion pressure of the airbag.

Description

Skin for automobile interior materials {SKIN OF INTERIOR MATERIAL FOR VEHICLE}

The present invention relates to a skin for an interior material of a vehicle, and more particularly, to a skin for an interior material of a vehicle which is made to be attached to the front surface of an interior material of a vehicle.

The instrument panel is a part of the dashboard where various mechanical devices are attached to the front of the driver's seat, and is also called an instrument board.

An instrument is an instrument, and a panel is a control panel that controls it. In the center of the dashboard, the instrument panel that displays various information necessary for driving, the steering wheel that controls the direction of the car, and the center fascia equipped with the control panel for audio or air conditioner are collectively called the instrument panel.

The passenger air bag is an airbag installed to protect the passenger seat occupant. It is installed above the glove box of the instrument panel. When the vehicle collides from the front, it is activated when an impact greater than a set value is applied to the entire vehicle. protect the upper body

The airbag door is coupled to the back of the instrument panel. When the passenger airbag is activated, the front of the airbag door is rotated and opened by the inflation pressure of the airbag. A groove corresponding to the open shape of the airbag door is formed on the rear surface of the instrument panel. Accordingly, the instrument panel is also rotated and opened with the groove portion destroyed by the inflation pressure of the airbag. At this time, the skin covering the front of the instrument panel is also destroyed.

In this regard, Republic of Korea Patent Publication No. 2039033 (hereinafter referred to as 'prior literature') discloses a polishing apparatus and an interior material for a vehicle. The polishing apparatus of the prior literature includes a polishing unit for forming a skin weaker portion thinner than other areas by polishing a skin portion wrapped in a base portion, a moving portion for moving the skin portion relative to the polishing portion, and a skin along the airbag incision line to be cut when the airbag is opened. and a control unit for controlling at least one of the polishing unit and the moving unit so that the weak unit is formed.

The polishing apparatus of the prior art may form a thin skin vulnerable portion in the skin portion that is cut when the airbag is opened by using the polishing portion and the moving portion.

However, a movable means for rotating or moving the abrasive part with respect to the skin part must be provided, and the moving part must be capable of moving the grinding part with respect to the skin part fixed to the base or moving the skin part with respect to the grinding part. Therefore, in order to apply the polishing apparatus of the prior literature to a production line, there is a problem in that it is necessary to additionally install a plurality of actuators and other mechanical devices in the production line.

The leather (natural leather, synthetic leather) constituting the skin is vulnerable to heat. That is, leather is a material that is easily deformed by heat. And the skin weakness forms a very thin thickness. Therefore, the skin vulnerable part is a part where thermal deformation can occur very easily.

However, the polishing apparatus of the prior art forms a skin weak part by friction (abrasion) of the skin due to the rotational movement of the polishing part. And friction (wear) of materials is necessarily accompanied by frictional heat generation. Therefore, the polishing apparatus and the interior material for a vehicle have a problem of thermal deformation of the weak skin part due to frictional heat generated concentrated on the weak skin part in the process of forming the skin weak part.

Republic of Korea Patent Publication No. 2039033 (Registration date: 2019.10.25)

An object of the present invention is to provide a skin for automobile interior materials that does not require additional installation of mechanical devices such as actuators in the production line, does not generate thermal deformation during the manufacturing process, and causes the target site to be accurately ruptured by the inflation pressure of the airbag. will be.

The above object is, according to the present invention, as a skin attached to the front surface of an interior material of a vehicle, the interior material having a groove ruptured by the inflation pressure of the airbag, the skin comprising: an exposed portion exposed to the interior of the vehicle; and a built-in part attached to a rear surface of the exposed part, wherein the built-in part includes: a rupture part interposed between the exposed part and the interior material in front of the groove; and an attachment part formed integrally with the rupture part and interposed between the exposed part and the interior material other than in front of the groove, wherein the rupture part has a smaller tensile force than the attachment part ( It is achieved by a skin for automotive interiors, characterized in that it forms tensile strength.

The attachment part and the rupture part may be integrally weaved, and the rupture part may be woven with a lower density than that of the attachment part.

The attachment part and the rupture part may be woven to have the same thickness.

The inner part may be attached to the rear surface of the exposed part in a state in which the rupture part is stretched in the width direction so that the elongation of the rupture part is reduced when the airbag is operated.

When the built-in part is attached to the rear surface of the exposed part, the width of the rupture part may be adjusted so that the thread woven on the rupture part may have a greater elongation than the thread woven on the attachment part.

A plurality of protruding members are coupled to the rear surface of the attachment part, and a plurality of insertion grooves into which the protruding members are inserted may be formed on the front surface of the interior material so that the rupture part is disposed in front of the groove.

According to the present invention, the attachment part and the rupture part are integrally weaved, and the rupture part is woven at a lower density than the attachment part, so there is no need to additionally install mechanical devices such as actuators in the production line, and thermal deformation occurs during the manufacturing process. It becomes possible to provide a skin for an automobile interior material that is made not to do so.

In addition, since the rupture portion forms a smaller tensile strength than the attachment portion so as to be ruptured by the inflation pressure of the airbag, it is possible to provide a skin for an automobile interior material in which the target portion is precisely ruptured by the inflation pressure of the airbag.

1 is a perspective view illustrating an automobile interior material to which a skin for automobile interior material is attached according to an embodiment of the present invention.
FIG. 2 is a perspective view illustrating a coupling state between an automobile interior material and an airbag door of FIG. 1 .
3 is an exploded perspective view of an automobile interior material and a skin for automobile interior material of FIG. 1 .
4 is a partial cross-sectional view of the skin for an automobile interior material of FIG. 3 .
5 is a partial cross-sectional view of an automobile interior material to which a skin for vehicle interior material of FIG. 1 is attached.
6 is a perspective view illustrating a fabric of the skin for an automobile interior material of FIG. 3 .
7 is a perspective view showing a fabric of a skin for an automobile interior material according to another embodiment of the present invention.
8 is a partial cross-sectional view showing a skin for an automobile interior material and an automobile interior material according to another embodiment of the present invention.
9 is a partial cross-sectional view showing a state in which the vehicle interior skin of FIG. 8 is attached to the vehicle interior material.
10 and 11 are perspective views showing the fabric of the skin for an automobile interior material of FIG. 8 .

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in describing the present invention, descriptions of already known functions or configurations will be omitted in order to clarify the gist of the present invention.

The skin for automobile interior materials of the present invention does not require additional installation of mechanical devices such as actuators in the production line, does not generate thermal deformation during the manufacturing process, and is made to rupture the target site accurately by the inflation pressure of the airbag.

1 is a perspective view showing an automobile interior material 1 to which a skin 10 for automobile interior materials is attached according to an embodiment of the present invention.

FIG. 2 is a perspective view illustrating a coupling state between the vehicle interior material 1 and the airbag door 2 of FIG. 1 . 3 is an exploded perspective view of the vehicle interior material 1 and the vehicle interior material skin 10 of FIG. 1 .

4 is a partial cross-sectional view of the skin 10 for an automobile interior material of FIG. 3 . 5 is a partial cross-sectional view of the automobile interior material 1 to which the automobile interior material skin 10 of FIG. 1 is attached.

6 is a perspective view showing the original fabric 10A of the skin for automobile interior material of FIG. 3 . 7 is a perspective view showing a fabric 10A of a skin for an automobile interior material according to another embodiment of the present invention.

1 to 3 , the skin 10 for a vehicle interior material according to an embodiment of the present invention is attached to the front surface of the vehicle interior material 1 .

Here, the automobile interior material 1 may mean an instrument panel, a door trim, a garnish, a console, and the like. 1 to 3 show an instrument panel as an example of the vehicle interior material 1 .

The instrument panel is the part of the dashboard where various mechanical devices are attached to the front of the driver's seat, and is also called an instrument board. The center fascia equipped with the control panel of the air conditioner is collectively called the instrument panel.

Hereinafter, the front and rear are based on the interior of the vehicle. The side facing the interior of the vehicle is intended to be referred to as the front side. And the surface opposite to the surface facing the interior of the vehicle is intended to be referred to as the rear.

1 and 2 , the airbag door 2 may be attached to the rear surface of the interior material 1 . The front surface of the airbag door 2 and the rear surface of the interior material 1 form surfaces facing each other. S in FIG. 1 means an imaginary line corresponding to the front edge of the airbag door 2 .

An airbag module (not shown) is coupled to the airbag door 2 . An airbag (not shown) inflates upon a vehicle collision. The airbag is inflated into the vehicle interior to protect the body of the occupant. The air bag-related technology is a well-known technology in the automobile industry, and further detailed description thereof will be omitted.

As shown in FIG. 1 , a groove (hereinafter, 'concave groove 1A') that is ruptured by the inflation pressure of the airbag is formed on one surface of the interior material 1 . As the airbag is inflated, it protrudes into the vehicle interior through the ruptured gap of the concave groove 1A to protect the occupant's body.

The concave groove 1A may be formed in a deeply recessed form in the form of a line or the like on the rear surface of the interior material 1 . Therefore, the interior material 1 can form a very thin thickness along the concave groove (1A).

3 and 4 , the skin 10 may include an exposed part 100 and an internal part 200 .

As shown in FIG. 5 , the rear surface of the interior part 200 is attached to the front surface of the interior material 1 . It should be understood that the lower surface is the rear surface and the upper surface is the front surface in FIGS. 4 and 5 .

The exposed portion 100 forms the front surface of the skin 10 . The exposed part 100 is exposed to the interior of the vehicle. The exposed part 100 may be made of natural leather, artificial leather, or synthetic resin.

The built-in part 200 may be attached to the rear surface of the exposed part 100 by an adhesive. The interior part 200 may be made of a textile (textile).

In general, the skin fabric 10A is attached to the front surface of the interior material 1 by an In Mold Grain (IMG) process or an In Mold X (IMX) process. Since the In Mold Grain (IMG) process and the In Mold X (IMX) process are well-known technologies, detailed descriptions thereof will be omitted.

As shown in FIG. 6 , the fabric of the exposed part 100 and the fabric of the inner part 200 are attached to each other before the IMG (In Mold Grain) process or the IMX (In Mold X) process to form the skin fabric 10A. to form The fabric wound in the roll shape of FIG. 6 means the skin fabric 10A to which the fabric of the exposed part 100 and the fabric of the interior part 200 are attached to each other.

3 and 5 , the internal part 200 is configured to include a rupture part 210 and an attachment part 220 . The rupture part 210 and the attachment part 220 are made of an integral fabric. The attachment part 220 and the rupture part 210 may be integrally weaved.

As shown in FIG. 5(b) , the cushion layer 300 may be interposed between the interior material 1 and the interior portion 200 . The cushion layer 300 may be made of PU foam or 3D filament. The cushion layer 230 may absorb shock and implement a soft touch.

As shown in FIG. 5 , the rupture portion 210 is a portion interposed between the exposed portion 100 and the interior material 1 in front of the concave groove 1A. The attachment part 220 is a part interposed between the exposed part 100 and the interior material 1 other than the front of the concave groove 1A.

The rupture portion 210 forms a smaller tensile strength than the attachment portion 220 . The tensile force is the breaking strength at the moment when an object is destroyed by an external force when it is pulled. The tensile strength of a fabric can be expressed as a load (breaking strength) per unit width.

When the airbag is inflated, the interior material 1 is destroyed along the concave groove 1A. Accordingly, the inflation pressure of the airbag is intensively transmitted to the rupture portion 210 provided in the front of the concave groove 1A. The rupture part 210 is more easily broken than the attachment part 220 . Accordingly, the internal part 200 is rapidly destroyed along the rupture part 210 by the inflation pressure of the airbag.

And the inflation pressure of the airbag is intensively transmitted to the exposed part 100 provided in front of the rupture part 210 . Accordingly, in the exposed part 100, the front part of the rupture part 210 is rapidly destroyed, and the airbag protrudes into the room by the inflation pressure.

In the polishing apparatus and vehicle interior material of the prior document, a thin skin vulnerable portion that is cut when the airbag is opened can be formed in the skin portion by using the polishing portion and the moving portion.

However, a movable means for rotating or moving the abrasive part with respect to the skin part must be provided, and the moving part must be capable of moving the grinding part with respect to the skin part fixed to the base or moving the skin part with respect to the grinding part. Therefore, in order to apply the polishing apparatus of the prior literature to a production line, there is a problem in that it is necessary to additionally install a plurality of actuators and other mechanical devices in the production line.

The leather constituting the skin is vulnerable to heat. That is, leather is a material that is easily deformed by heat. And the skin weakness forms a very thin thickness. Therefore, the skin vulnerable part is a part where thermal deformation can occur very easily.

However, the polishing apparatus of the prior art forms a skin weak part by friction of the skin due to the rotational movement of the polishing part. And friction of materials is necessarily accompanied by frictional heat generation. Therefore, the polishing apparatus and the interior material for a vehicle have a problem of thermal deformation of the weak skin part due to frictional heat generated concentrated on the weak skin part in the process of forming the skin weak part.

In the skin 10 for an automobile interior material according to an embodiment of the present invention, an interior part 200 made of a fabric is attached to the rear surface of the exposed part 100, but when the interior part 200 is weaved, the interior part ( By forming the rupture portion 210 to form a smaller tensile force than the attachment portion 220 in 200), the above-described problem of the prior art is solved.

The tearing part 210 may be woven with a thread thinner than the attachment part 220 so that the tearing part 210 forms a smaller tensile strength than the attachment part 220 .

Alternatively, the tearing portion 210 may be woven with a smaller number of warp and weft threads than the attachment portion 220 so that the tearing portion 210 forms a smaller tensile strength than the attachment portion 220 .

Alternatively, the tearing part 210 may be woven with a twill or hand-woven weave, and the attachment part 220 may be woven with a plain weave so that the tearing part 210 forms a smaller tensile strength than the attachment part 220 .

A fabric is a fabric made by intersecting warp (warp) and weft (weft) threads at right angles. A fabric can make a strong fabric if there are many intersections. There are plain weave, twill weave, and satin weave depending on the weaving method.

Plain weave is the simplest and densest of the warp and weft weaving methods, and the warp and weft threads intersect one by one. The strength is strong because there are many intersections.

Twill weave is a fabric in which two or more yarns are skipped each of the warp and weft to make diagonal lines appear. A suja weave is a fabric in which the warp yarns are arranged at regular intervals over four or more weft yarns. In general, twill weave and weave weave form a lower strength than plain weave.

Weaving the tearing part 210 with a thread thinner than the attachment part 220, weaving the tearing part 210 with a smaller number of warp and weft threads than the attachment part 220, or weaving the tearing part 210 in a twill weave or a twill weave And even though the attachment part 220 is woven in a plain weave, the attachment part 220 and the tear part 210 are woven with the same thickness.

When the rupture part 210 is woven with a thinner thickness than the attachment part 220, the rupture part (cavity) is generated near the rupture part 210 due to the thickness difference when the skin 10 is deformed by external force or light. Deformation of skin 10 may be concentrated along 210 . When the attachment part 220 and the rupture part 210 are woven to have the same thickness, deformation of the skin 10 due to external force or light can be minimized.

As shown in FIG. 7 , the rupture part 210 may be formed in a long shape in one direction from the front on the extension line of the concave groove 1A.

The tensile force is accompanied by a deformation called elongation. Elongation can be expressed in %. When the skin fabric 10A is manufactured, the inner part 200 may be attached to the rear surface of the exposed part 100 in a state in which the rupture part 210 is stretched in the width direction. The width direction of the rupture part 210 means a direction perpendicular to the longitudinal direction of the rupture part 210 .

When the inner part 200 is attached to the rear surface of the exposed part 100 , so that the width of the rupture part 210 can be easily adjusted, the thread woven on the rupture part 210 has a greater elongation than the thread woven on the attachment part 220 . (elongation) can have.

When the inner part 200 is attached to the rear surface of the exposed part 100 in a state in which the rupture part 210 is already stretched in the width direction, the elongation of the rupture part 210 is reduced when the airbag is operated. Accordingly, as the rupture portion 210 is more rapidly destroyed by the inflation pressure of the airbag, the airbag may more rapidly protrude into the vehicle interior.

8 is a partial cross-sectional view showing the skin 10 and the vehicle interior material 1 according to another embodiment of the present invention.

9 is a partial cross-sectional view showing a state in which the vehicle interior material skin 10 of FIG. 8 is attached to the vehicle interior material 1 .

10 and 11 are perspective views showing the original fabric 10A of the skin 10 for an automobile interior material of FIG. 8 .

8 and 9 (a), a plurality of protruding members (P) are coupled to the rear surface of the attachment part 220, a plurality of inserts in which the protruding member (P) is inserted in the front surface of the interior material (1) A groove H may be formed.

As shown in FIGS. 10 and 11 , the plurality of protruding members P may be disposed opposite to each other with respect to the rupture part 210 . The plurality of protruding members P may form a shape parallel to the longitudinal direction of the rupture portion 210 . In addition, the plurality of protruding members (P) may form a shape parallel to each other.

The protruding member P may be made of a plastic material having rigidity. The protrusion member P may be adhered to the rear surface of the attachment part 220 by an adhesive.

As shown in Fig. 9 (a), when the rear surface of the interior part 200 is attached to the interior material 1 front surface, that is, when skin wrapping is performed on the vehicle interior material 1 front surface, the protruding member P is It is inserted into the insertion groove (H).

When the skin wrapping is performed on the front surface of the automobile interior material 1, the skin fabric 10A made of leather and cloth may be slightly stretched. At this time, when the skin fabric 10A is stretched, there is a possibility that the rupture portion 210 is slightly separated from the front of the concave groove 1A.

In a state in which the protruding member P is inserted into the insertion groove H, the rupture portion 210 is precisely disposed in front of the concave groove 1A. Accordingly, it is possible to prevent a misalignment problem between the ruptured portion 210 and the concave groove 1A due to the stretching of the skin fabric 10A during skin wrapping.

As shown in Figure 9 (b), when the cushion layer 300 is interposed between the interior material 1 and the interior portion 200, the plurality of protruding members (P) are to be coupled to the back surface of the cushion layer 300 can

According to the present invention, the attachment part and the rupture part are integrally weaved, and the rupture part is woven at a lower density than the attachment part, so there is no need to additionally install mechanical devices such as actuators in the production line, and thermal deformation occurs during the manufacturing process. It becomes possible to provide a skin for an automobile interior material that is made not to do so.

In addition, since the rupture portion forms a smaller tensile strength than the attachment portion so as to be ruptured by the inflation pressure of the airbag, it is possible to provide a skin for an automobile interior material in which the target portion is precisely ruptured by the inflation pressure of the airbag.

In the foregoing, specific embodiments of the present invention have been described and illustrated, but it is common knowledge in the art that the present invention is not limited to the described embodiments, and that various modifications and variations can be made without departing from the spirit and scope of the present invention. It is self-evident to those who have Accordingly, such modifications or variations should not be individually understood from the technical spirit or point of view of the present invention, and modified embodiments should be said to belong to the claims of the present invention.

10: car interior skin 10A: skin fabric
100: exposed part 200: built-in part
1: interior material 210: rupture part
1A: concave groove 220: attachment part
2: airbag door 300: cushion layer
P : Projecting member H : Insertion groove

Claims (6)

As a skin attached to the front of the interior material of a vehicle,
A groove is formed in the interior material to be ruptured by the inflation pressure of the airbag,
The skin is
an exposed portion exposed to the interior of the vehicle; and
It includes a built-in part attached to the rear surface of the exposed part,
The interior part,
a rupture part interposed between the exposed part and the interior material in front of the groove; and
It is formed integrally with the rupture part and includes an attachment part interposed between the exposed part and the interior material other than the front of the groove,
The rupture portion, characterized in that to form a smaller tensile strength (tensile strength) than the attachment portion so as to be ruptured by the inflation pressure of the airbag. According to claim 1,
The attachment part and the rupture part are integrally woven (weaving),
The skin for an automobile interior, characterized in that the rupture portion is woven with a lower density than the attachment portion. 3. The method of claim 2,
The skin for an automobile interior material, characterized in that the attachment part and the rupture part are woven with the same thickness. 3. The method of claim 2,
The skin for an automobile interior material, characterized in that the interior part is attached to the rear surface of the exposed part in a state in which the rupture part is stretched in the width direction so that the elongation of the rupture part is reduced when the airbag is operated. 3. The method of claim 2,
When the interior part is attached to the rear surface of the exposed part, so that the width of the rupture part is adjusted, the thread woven on the rupture part has a greater elongation than the thread woven on the attachment part. . According to claim 1,
A plurality of protruding members are coupled to the rear surface of the attachment part,
A skin for an automobile interior material, characterized in that a plurality of insertion grooves into which the protruding member is inserted are formed on the front surface of the interior material so that the rupture part is disposed in front of the groove.

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