JPS6349556A - Trimming for vehicle - Google Patents

Abstract

PURPOSE:To eliminate a wire harness by forming a printed circuit on the back of the skin of a trimming, and the circuit to an electric equipment fitting hollow body formed on said trimming, and conductively connecting electric equipment to said circuit. CONSTITUTION:An automobile cowl board 10 consists of a skin 14 which covers the outer surface of a resin foam 12, or a base material, plural hard insulating material hollow body 22 which are embedded in the resin foam 12 being mated with plural openings 16 formed on the skin 14, and hard material air conditioning ducts 24, 26 which are embedded in the resin foam 12 extending in the longitudinal direction of the cowl board 10. In this case, a conductive film 18 which forms a printed circuit is additionally provided on the back of the skin 14. And, a part of the film 18 is exposed inside the hollow body 22 at the opening part of the hollow body 22, a pair of hook type terminals 20 are fixed to the exposed conductive film 18, and electric equipment fitted into the hollow body 22 is conductively connected to the terminals 20.

Description

[Detailed Description of the Invention] Ll 22 Engineering History 1 The present invention is an instrument panel or a sound? [This relates to a vehicle interior body made of a resin foam as a base material and whose surface is covered with a skin, such as a panel that supports electrical equipment such as containers and lighting.

- Automobile instrument panels are broadly divided into two types: (1) press-molded steel products that are fixed to the vehicle body by welding or screwing, and (2) resin molded products that are fixed to the vehicle body by screwing.

■If the instrument panel is made of resin, it can be significantly lightened. ■A high degree of freedom in design;■In steel plate press-formed products, the safety pad (protective buffer), which is attached as a separate piece to the front edge of the top, can be foam-molded integrally with the main body. Moreover, in recent years, instrument panels have become larger and more complex, and resin instrument panels are often adopted because they can provide a good design effect.

The normally used resin instrument panel is instrument panel 0 shown in Figure 1.
As shown in 1, a structure in which a resin foam (e.g., urethane foam, polystyrene foam) 02 is covered with a skin (e.g., semi-rigid or flexible vinyl chloride sheet) 03, leaving a part of it, is common. In addition to having a space 04 used for arranging articles, etc., an opening for installing instruments or a ventilation opening 06 for air conditioning is formed. and,
A reinforcing base material 07 made of hard resin or steel plate is integrally joined to the void formed in the resin foam, and this reinforcing base material 01 not only defines the void, but also It has a function of improving the rigidity of the instrument panel 01.

In addition, an air conditioning duct connected to the air outlet 06 is arranged in the empty space 04 (however, if the reinforcing base material 07 is formed in a cylindrical shape, a separate duct is not required). , electrical equipment (speedometer, engine revolution meter).

Wire harness (fuel gauge, various indicator lights, etc.) connected to
(braided wires) are installed.

This wire harness is equipped with terminals, connectors, etc., and is fixed with a presser piece that is screwed onto the wall surface of the reinforcing base material 07. The reinforcing base material 07 contacts them and vibrates, generating noise. In addition, a large number of electrical equipment can be installed on the instrument panel.
1, the work of connecting the wire harness to the terminals and connectors was complicated, and this significantly hindered the efficiency of vehicle assembly work.

To deal with the inconvenience that occurs when wiring harnesses are installed in the empty space of the instrument panel, a structure in which a printed wiring board is attached to the back of the instrument panel body, or a structure in which the printed wiring board is attached to the resin that is the base material of the instrument panel, is available. One example is a structure (Japanese Utility Model Application Publication No. 108336/1983) in which the structure is embedded inside a foam cushioning material.

However, if a printed wiring board is separately prepared and combined with the instrument panel main body, the instrument panel becomes thicker and heavier, and the number of parts and man-hours increase in manufacturing the instrument panel.

The present invention was created with this technical background in mind, and its purpose is to omit the conventionally widely used wire harness, thereby reducing the number of parts and assembly man-hours. The object of the present invention is to provide an interior body for a vehicle that reduces noise and prevents the generation of noise due to contact vibration between parts.

The purpose of this is to use resin foam as a base material and cover the surface with a skin, and to use the back side of the skin or the foam A printed wiring circuit is formed on the smooth surface of an insulating material member that is integrated with the resin foam during molding, and
A part of the printed wiring circuit, or its lead-out part, is made to face the hollow body made of a hard insulating material for fitting electrical equipment fitted into the recess, so that the electrical equipment for the second part of the printed wiring circuit, or its lead-out part is exposed. This is accomplished by allowing electrically conductive connections to the equipment.

Omitting the wire harness that was conventionally used as a wiring means for electrical equipment installed in the interior of a vehicle and using a printed wiring board is advantageous in terms of reducing the number of parts and making effective use of space. . However, the printed wiring board itself has a certain size,
If you want to further bring out the characteristics of a printed wiring circuit, which occupies almost zero space, you can omit the dedicated board and use the components that make up the conventional instrument panel using a wire harness as the printed wiring board. It is effective to do so.

FIG. 2 shows an automobile instrument panel 10 according to an embodiment of the present invention.
is shown as a vertical sectional view of the main part. The instrument panel 10 includes a resin foam 12 (e.g., urethane foam) as a base material, a skin 14 (made of semi-rigid or soft vinyl chloride resin) that covers the outer surface of the resin foam 12, and a skin 14 formed on the skin 14. A plurality of hollow bodies 22 made of a hard insulating material are embedded in the resin foam 12 in alignment with the plurality of openings 16, and an air conditioner made of a hard material is embedded in the resin foam 12 extending in the longitudinal direction of the instrument panel 10. ducts 24 and 26 as main members.

The hollow body 22 has an opening that matches the opening 16 of the skin 14, and it is possible to fit an electrical device 28 into the hollow body 22 through the opening 16 and the opening of the hollow body 22.

Further, a conductive film 18 forming a printed line circuit is attached to the back surface of the skin 14, and a part of the conductive film 18 is exposed inside the hollow body 22 at the opening of the hollow body 22, and the exposed conductive film 18 is exposed at the opening of the hollow body 22. A pair of piece-shaped terminals 20 are soldered and fixed to :418. An electrical device 28 fitted within the hollow body 22 is electrically connected to the terminal 20 .

The instrument panel 10 having such a structure is manufactured by the following procedure.

■As shown in FIG. 3, the conductive film 18 forming the printed wiring circuit is formed by heating the skin 14 attached to the back surface of the conductive film 18 in advance, and by vacuum forming it along the inner wall of the lower mold 30. and install it. That is, the lower mold 30 has a plurality of deaeration holes 3.
2 is formed, and while degassing through the deaeration hole 32, the lower mold 3 is removed by using a male mold or compressed air.
The skin 14 is given a shape that follows the inner wall of 0 (FIG. 4).

■A pair of hook-shaped terminals 20 is fixed to the conductive film 18 by soldering (or welding) in accordance with the position where the electrical equipment 28 is attached (Fig. 5), and is further made into a cup shape to cover the terminal 20. The hollow body 22 is adhesively bonded to the skin 14 (FIG. 6).

■ Align the upper mold 34 with the lower mold 30, and inject a resin foaming liquid into the mold hole (cavity) defined by both molds to foam the skin 14, the air conditioning duct 24, 26, and Forming the resin foam 12 integrated into the hollow body 22 (Seventh
figure). Note that air conditioning ducts 24 and 26 are installed in the mold cavity (see FIG. 2).

■ After taking out the obtained foam molded product 10A from the mold, as a post-treatment, the ears 14a1 of the skin 14 and the hollow body 22 are
A portion 14b corresponding to the opening is cut out, and an opening 16 is formed by cutting out the portion 14b (FIG. 8).

■ Opening 16 for hollow body 22 of completed instrument panel 10
The electrical equipment 28 is fitted through the connector. This fitting operation connects the electrical device 28 to the terminal 20 (
Figure 9).

In this way, in this example, a printed wiring circuit (conductive film 18) for electrical equipment is formed on the back surface of the skin 14 that is integrated with the resin foam 12 without using a separate printed wiring board. There is no need to attach a wire harness consisting of many parts along the back of the instrument panel, and the number of parts hanging from the instrument panel body can be reduced, space can be used more effectively, and the number of parts can be significantly reduced. , and the number of man-hours required for assembling the instrument panel 10 can be reduced. Then there are the connectors and fuse blocks that are required in wiring harnesses.

It is possible to completely eliminate contact vibration noise between components such as fusible links and diodes, or between them and other components. In addition, the hollow body 22 not only can always secure a space for storing the electrical equipment 28 and the terminal 20 within the flexible resin foam 12, but also allows the resin foam 12 to be This function prevents the terminal 20 from being embedded in the terminal 12.

Next, the instrument panel 36 according to the modification shown in FIG. 10 will be explained. The instrument panel 36 is made of resin foam 3 as a base material.
8, a skin 40 that covers the outer surface of the resin foam 38, and a plate-shaped reinforcing base material 4 made of a hard insulating material that covers the back surface of the resin foam 38.
2, a plurality of hollow bodies 48 made of hard insulating material (both ends are open) embedded in the resin foam 38, and an air conditioning duct 52 also embedded in the resin foam 38 as the main members. There is. The reinforcing base material 42 is integrated with the resin foam 38 and has a printed wiring circuit (conductive film 46 ) on one side thereof.
) is formed and conductive l! 46 via a lead wire 54 is supported by a rubber annular support piece 50 fixed to the inner wall of the hollow body 48, and is fitted into the hollow body 48 through an opening formed in the skin 40. Electrical equipment 5
8 and a connector 56 are connected. The annular support piece 50 applies back pressure to the connector 56 when pressing and connecting the electrical equipment 58 to the connector 56, and also absorbs dimensional errors of each member when the electrical equipment 58 is fitted into the hollow body 48. It has the function of

The reinforcing base material 42 is provided with a plurality of locking pieces 44 that engage with each hollow body 48, and this coupling relationship between the reinforcing base material 42 and the hollow bodies 48 is the same as in the previous embodiment. The positional relationship between the two when forming the resin foam 38 using a mold,
This is necessary for accurately determining the relative attitude, and also has the advantage of improving the strength of the instrument panel 36.

In this example as well, there is no need to use a separate printed wiring board (and a printed wiring circuit (conductive
1!46), it is possible to omit the conventionally used wire harness, hold down the component suspension ring of the instrument panel body, make effective use of space, and greatly reduce the number of parts and assemble the instrument panel 36. It is possible to reduce work man-hours. Furthermore, as in the embodiments described above, it is possible to eliminate contact vibration noise between members. In addition, in the figure, 60
indicates a vehicle body panel, and 62 indicates a windshield.

As is clear from the above explanation, the base material is resin foam,
A vehicle interior body whose surface is covered with a skin, and in which electrical equipment is fitted into a recess provided on the skin side, and which is integrated with the resin foam on the back surface of the skin or during foam molding. A printed wiring circuit is formed on the smooth surface of a member made of an insulating material, and a part of the printed wiring circuit or its lead-out portion is fitted into the recess. A vehicle interior body has been proposed that faces inside the body and enables conductive connection of electrical equipment to a part of the printed wiring circuit or its lead-out portion.

The present invention provides a wire harness in which components such as terminals, connectors, fuse blocks for circuit protection, fusible links, resistors, diodes, etc. are assembled together, and vinyl tape, vinyl tubes, corrugated tubes, etc. are used as protective materials. Instead, we used a printed wiring circuit attached to the back of the skin or the smooth surface of the insulating stuffed material that is integrated with the resin foam during foam molding, resulting in a significant reduction in the number of parts and 2 assembly man-hours. Reductions may be planned. In addition, since the above-mentioned parts that should be integrally assembled into the wire harness are omitted, there is no contact vibration noise between parts or contact vibration noise between parts and other parts, which helps maintain quietness in the vehicle interior. can contribute.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway perspective view showing a known resin instrument panel for an automobile, FIG. 2 is a longitudinal sectional view of a resin instrument panel for an automobile according to an embodiment of the present invention, and FIG. A perspective view of the main parts showing the skin for a resin instrument panel before molding, FIGS. 4 to 8 are diagrams showing the manufacturing procedure of the resin instrument panel for an automobile, and FIG. 9 is a perspective view of the skin for the resin instrument panel for an automobile. A cross-sectional view of a main part showing a state in which electrical equipment is assembled (see FIG. 2), FIG. 10 is a longitudinal cross-sectional view showing a resin instrument panel for an automobile according to a modified example. 10... instrument panel, 12. ...Resin foam, 14...
Epidermis, 16... Opening, 18... Conductive film, 20...
Terminal, 22...Hollow body, 24...Air conditioning duct, 2
6...Air conditioning duct, 28...N equipment, 30...
・Lower mold, 32... Deaeration hole, 34... Upper mold, 36
... Instrument panel, 38 ... Resin foam, 40 ... Skin, 42 ... Reinforcement base material, 44 ... Locking piece, 46 ...
Conductive film, 48... Hollow body, 50... Annular support piece, 5
2... Air conditioning duct, 54... Lead wire, 5G...
・Connector, 58...Electrical equipment.

Claims (1)

[Scope of Claims] In a vehicle interior body, which is made of a resin foam as a base material and whose surface is covered with a skin, and is used by fitting electrical equipment into a recess provided on the skin, the back surface of the skin; Alternatively, a printed wiring circuit is formed on the smooth surface of an insulating material member that is integrated with the resin foam during foam molding, and a part of the printed wiring circuit or its lead-out portion is fitted into the recess. An interior body for a vehicle, characterized in that the interior body faces into a hollow body made of a hard insulating material for fitting electrical equipment, thereby enabling conductive connection of the electrical equipment to a part of the printed wiring circuit or a lead-out portion thereof. .