KR102047028B1 - Assembly of crash pad and duct with a hermetically sealed coupling structure - Google Patents

Abstract

Disclosed is a crash pad duct assembly with a hermetic coupling structure. According to the present invention, the crash pad duct assembly with a hermetic coupling structure comprises: a crash pad having one or more blowing holes adjacent to a window; a duct part disposed on the lower part of the crash pad to blow air of a vehicle air conditioning system through an open end communicating with the blowing hole; an elastic sealing part protruding in a ring shape around the circumference of the open end by double injection to be integrated with the duct part; and a coupling part guiding the sliding coupling between the crash pad and the duct part and formed to gradually press the sealing part to allow the blowing hole to communicate with the open end in a sealed state. Accordingly, due to the ring-shaped sealing part double-injected to be integrated with the open end of the duct part discharging the air of the vehicle air conditioning system, sealing between the duct part and the crash pad is realized with uniform and constant quality, thereby effectively reducing the likelihood of any sealing defect and discharge noise and securing durability against vibration.

Description

Crash pad duct assembly with hermetic coupling structure {ASSEMBLY OF CRASH PAD AND DUCT WITH A HERMETICALLY SEALED COUPLING STRUCTURE}

The present invention relates to a crash pad duct assembly of a hermetic coupling structure, and more particularly, to an assembly composed of a duct and a crash pad capable of improving the sealing property between the duct and the crash pad and simplifying the assembly process.

Defroster is a device that attaches to the front windshield of the driver's seat in a narrow sense and removes it so that the view is not obscured by frost or ice snow, but in a broad sense, it includes an air passage for controlling air conditioning and heating. It may also refer to the entire duct arrangement for the wind tunnel of a vehicle air conditioning system.

The defroster generally consists of a plurality of duct structures branching from the air conditioning system of the vehicle, and the opening end formed at the end of the duct is finally communicated with and coupled with a crash pad, which is an interior material of the vehicle.

In this coupling structure, a separate sealing structure is applied between the duct opening end of the defroster and the crash pad so that air provided from the vehicle air conditioning system is not lost to the coupling gap.

In connection with the application of the sealing to the sealing structure as described above, conventionally, as shown in Figure 6 (a), after the operator attaches or adheres the sealing pad of the elastic material along the circumference of the open end manually, such as a heat sealer The assembly process and the sealing process were performed in such a way that the crash pads and the ducts were thermally bonded to each other by using.

However, in the conventional assembly and sealing process, the sealing pad is regulated by the operator's manual work and is attached to the periphery of the open end, thereby exposing the sealing pad to the outside as shown in FIG. .

In addition, since the sealing and adhesion by the sealing pad is difficult to achieve a uniform and uniform quality according to the work experience of the operator, problems such as poor adhesion or poor sealing frequently occurred.

When a problem of poor quality related to the sealing occurs, the air discharged from the air conditioning system of the vehicle generates vibration and flow noise of the duct, and in the case of severe vibration, the crash pad and the open end of the duct are coupled. Improvement in the sealing process and the assembly process is required in that it causes problems such as disconnection of the liver or peeling or detaching from the attachment position.

An object of the present invention, the sealing operation between the duct and the crash pad, such as the defroster can be realized simply and quickly through a simple assembly process, to improve the sealing properties with a uniform quality, and is transmitted from the vehicle air conditioning system It is to provide a crash pad duct assembly of a sealed coupling structure that can be structurally secured against vibration.

The object of the present invention is a crash pad having at least one air vent adjacent to the window; A duct part provided at a lower portion of the crash pad to send air of the vehicle air conditioning system to the window through an opening end communicating with the blower; Sealing portion of the elastic material protruding in a ring shape along the circumference of the opening end by double injection so as to be integral with the duct portion; And a coupling part configured to guide sliding engagement between the crash pad and the duct part and gradually pressurize the sealing part to communicate between the blower port and the opening end in a sealed state. Can be achieved by

The coupling part is formed in a plurality of protruding from the rear of the crash pad lower surface, and gradually guides the pressing of the sealing portion against the lower surface of the crash pad in accordance with the insertion movement of the insertion plate extending rearward from the opening end Hook coupling portion provided with a coupling groove; And a plurality of bosses formed to protrude from the front of the bottom of the crash pad, and fitted into fastening holes formed in front of the opening end according to the insertion movement of the fitting plate, and configured to support and secure the pressure of the sealing portion. Can be.

The duct part is injected into a carbon fiber reinforced plastic by a method of injection molding a resin including at least one of PC, ABS and PBT resin, a method of thermocompression molding using SMC (Sheet Molding Compound), and overmolding It may be formed by any of the methods of forming.

The sealing unit may be formed by double injection into a material including at least one of silicon, synthetic rubber, expanded PP, expanded PS, expanded PU, or expanded PVC.

The sealing part may be formed of two or more sealing bodies spaced apart from each other in the outer direction of the opening end and arranged in parallel, and the two or more sealing bodies correspond to the disturbance vibration transmitted from the air conditioning system. It can be double-injected into the material to prevent resonance by varying its own natural frequency.

The sealing portion may be inserted into a ring-shaped insert groove formed around the open end of the corrugated leaf spring elastically deformed by the pressing force in the vertical direction; And it may include a ring-shaped member of the elastic material which is in contact with the upper surface of the leaf spring inserted into the insert groove and fitted into the insert groove so that a portion of the upper end protrudes.

According to the present invention, the sealing between the duct part and the crash pad is made uniform and uniform due to the ring-shaped sealing part double-injected so as to be integral with the opening end of the duct part for discharging air of the vehicle air conditioning system. Noise can be effectively reduced and durability against vibration can be ensured.

In addition, in the simple lateral sliding coupling process between the crash pad and the duct part, the sealing and assembling process between the duct part and the crash pad by the gradual pressurization of the sealing part is simultaneously performed, thereby reducing the labor of the production process. Reduction of assembly failure rate, productivity improvement, and production cost can be achieved.

1 is a perspective view of a crash pad duct assembly of a hermetic coupling structure according to an embodiment of the present invention.
FIG. 2 is an exploded perspective view, a partial enlarged view, and some modified examples of FIG. 1; FIG.
3 to 5 are cross-sectional views for showing the operating state of the coupling unit step by step in the crash pad and the duct sliding sliding side of Figure 2 respectively.
FIG. 6 is a view related to a case in which a worker attaches a sealing pad manufactured by separate products to a duct part manually.

Hereinafter, exemplary 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 to clarify the gist of the present invention.

1 is a perspective view of a crash pad duct assembly of a hermetic coupling structure according to an embodiment of the present invention, FIG. 2 is an exploded perspective view, a partial enlarged view and some modifications of FIG. 1, and FIGS. Figure 2 is a cross-sectional view for showing the operation state of the coupling step in the process of the crash pad and the duct sliding sliding side of Figure 2, respectively, Figure 6 is a worker pad attached to the duct by the worker manually It is a figure related to a case.

Right (top), bottom (bottom), left and right (side or side), front (front, front of the vehicle), rear (ship, rear of the vehicle), etc. refer to directions in the description of the invention and claims, etc. It is based on the relative position between the drawings and the configuration for the convenience of description rather than the purpose of, the directions described below are based on this, except where specifically defined otherwise.

The crash pad duct assembly 100 of the hermetic coupling structure according to the present invention is an assembly provided so that air provided from an air conditioning system of a vehicle is not unnecessarily lost and discharged in a desired direction, and a duct part which together forms an air flow path. While improving the sealing property between the 120 and the crash pad 110 to a uniform and uniform quality, the invention was devised to simultaneously perform the sealing work with a simple assembly process between the duct portion 120 and the crash pad 110. .

Due to the present invention, ultimately, the sealing failure, the vibration, the discharge noise, etc. are effectively reduced, and the work maneuver is reduced, so that the reduction of the assembly failure rate, the productivity improvement, and the production cost can be planned together.

In order to concretely implement the functions or functions as described above, the crash pad duct assembly 100 of the closed coupling structure according to the embodiment of the present invention, the crash pad 110, the duct portion 120, the sealing portion 130 ) And the coupling unit 140 may be configured.

Here, the crash pad 110 is generally provided in the front of the instrument panel or various vehicle convenience devices, etc. of the interior space of the vehicle refers to a plate-like component that performs a role such as buffering and shelves.

However, as illustrated in FIGS. 1 and 2, the crash pad 110 according to the present invention is disposed adjacent to a window of the vehicle, that is, the front window and the front side window, and the air vent for transmitting air conditioned from the air conditioning system of the vehicle. At least one 112 is provided as at least one crash pad 110, which is manufactured through injection molding made of synthetic resin, and may be integrally formed with the coupling part 140 to be described later.

At this time, the vent 112 is formed in the lower end of the front window of the vehicle as shown in Figure 1 elongated in the longitudinal direction of the air slit-shaped hole for transmitting the air, otherwise the side window of the vehicle It may further include a slit blower 112 for sending air.

The duct part 120 is provided under the crash pad 110 and forms a flow path so that the air conditioning air forced out of the vehicle air conditioning system flows in the desired direction. A hollow opening end 122 may be formed to communicate air 112 and to deliver the air conditioned to the window side, and the other end may include a connection end communicating with the vehicle air conditioning system.

At this time, the opening end 122 is in close contact with the bottom surface of the crash pad 110 around the air vent 112 described above, and the sealing end 130 to be described later can be arranged by the double injection method opening end 122 ), A circumferential extension surface 123 is formed, and an insert groove 123a corresponding to a position where the sealing portion 130 is to be formed may be formed in the circumferential extension surface 123.

The duct unit 120 considers high strength, chemical resistance, scratch resistance, heat resistance, shock resistance, and moldability, and reduces deformation due to shrinkage so that a product having a precise specification can be manufactured, such as a polycarbonate (PC), ABS (Acrylonitrile-Butadiene-Styrene) PP (Polypropylene), PE (Polyethylene), PS (Polystyrene) may be injection molded by using a resin containing at least one of the resin.

The polycarbonate (PC) -based resin is an amorphous thermoplastic resin, which is an engineering plastic having high mechanical strength, excellent heat resistance and insulation, strongest impact resistance among thermoplastic resins, and stable physical properties against moisture and temperature changes.

ABS (acrylonitrile-butadiene-styrene) resin has excellent secondary processability such as processability, moldability, impact resistance, heat resistance, chemical resistance, and coloring, and has good compatibility with other resins. Polycarbonate) and the like, and may be used to compensate for defects unique to the resin.

Polypropylene (PP) resin is an engineering plastic with excellent chemical resistance, dimensional stability, heat resistance, insulation, abrasion resistance, and low fatigue of bending. It can also be used in combination with other resins to compensate for defects between synthetic resins.

PE (Polyethylene) resin is an engineering plastic with excellent physical properties such as excellent barrier properties, thermal adhesion, and cold resistance to water and water vapor, and easy to process or form due to no significant change in viscosity even with rapid temperature changes.

Duct portion 120 made of a combination of the resins as described above, as the unique physical properties of each resin is complementary to each other to have the necessary properties to meet the purpose, rapid heating and rapid injection molding process Through cooling, it can be injected into a product with a clean appearance without a separate coating process.

In addition, the duct part 120 may be formed by thermocompression molding using SMC (Sheet Molding Compound). SMC is a lightweight material having the highest applicability in automobiles in recent years, and has a synthetic resin and a fiber reinforcement between carrier films facing each other. It is a sheet-like fiber-reinforced composite material made by adding a filler such as glass fiber or glass bubble.

In the present invention, by inserting the sheet-shaped SMC into the thermo-compression press mold for manufacturing the duct part 120 and heat-compressing, the duct part 120 is integrally manufactured, but a sharp shape change is possible due to excellent formability and high strength. It is advantageous in that both light weight and high productivity can be achieved.

In addition, in order to further improve the shock and sound absorption through the impact resistance and elasticity of the duct 120, the duct 120 may be made of carbon fiber reinforced plastic by the injection molding of the over-molding method. Here, the overmolding method refers to an injection molding method in which two or more different materials are integrated in one mold.

In the present invention, after the first injection of the synthetic resin, such as PC, ABS, PP, etc. into the mold of the mold mold injection mold, and then moved to the injection mold or core to form a second cavity, the carbon fiber cut to a predetermined size The duct part 120 is integrally manufactured by the second injection of the impregnated resin.

Unlike the above, the duct 120 may be manufactured by heating a carbon fabric cut in a corresponding shape and then inserting it into an injection mold and then injecting a synthetic resin such as PC, ABS, and PP into a cavity of a mold mold. Can be. At this time, the heating of the carbon fabric is to facilitate the bonding or impregnation between the resin injected into the cavity and the inserted carbon fabric.

The sealing part 130 is formed to protrude in a ring shape along the circumference of the opening end 122 by double injection so as to be integral with the duct part 120, so that the sealing end 130 is closed between the opening end 122 and the air vent 112. As a component of the elastic material to communicate, it is clearly distinguished from the sealing pad 10 is made of a separate material and the worker pad attached to the duct unit 120 manually by the material or application method.

Here, the sealing portion 130 is formed from the insert groove 123a of the above-described duct portion 120 by the double injection method, and the degree to protrude upwards, as described later, the crash pad 110 and the duct portion 120 When the lateral sliding coupling between the pressurized by the crash pad 110 and the degree of elastic deformation is sufficient is enough.

In addition, the sealing unit 130 may be disposed in an elastically deformed state between the opening end 122 and the vent 112 in the process of coupling between the crash pad 110 and the duct unit 120 by the coupling unit 140 to be described later. The cross-sectional shape is not particularly limited since the shape may be sufficient, but the cross-sectional shape is preferably circular for smooth sliding coupling between the crash pad 110 and the duct part 120.

Sealing unit 130 according to an embodiment of the present invention, the material containing at least one of silicone, synthetic rubber, expanded PP (polypropylene), expanded PS (polystyrene), expanded PU (polyurethane) and expanded PVC ((Polyvinylchloride) As a double injection is made to the insert groove 123a of the first injection-molded duct part 120 may be integrated with the duct part 120.

The double injection of the sealing portion 130 as described above is rotated by a turntable or core index method, the mold for forming the sealing portion 130 or the core is molded into the fixed side mold for the duct portion 120, and then the sealing portion 130 It can be made by the secondary injection of the forming material.

The reason why the injection molding unit 130 is integrally injection molded together with the duct unit 120 is that the sealing unit 130 is firmly positioned at the correct position without inputting additional labor for attaching the sealing unit 130. This is to improve the sealing property between the duct portion 120 and the crash pad 110 to a uniform and uniform quality by being installed and fixed.

On the other hand, the sealing unit 130 according to a modification of the present invention, as shown in the enlarged view of Figure 2 (a) two or more sealing spaced apart in the outer direction of the open end 122 and formed in indirect That is, it may be made of a sieve, for example, the first sealing body 130a and the second sealing body 130b.

In this case, the two or more sealing bodies more fully reinforce or supplement the sealing between the opening end 122 and the tuyeres 112, and at the same time, the duct part 120 itself in response to disturbance vibration transmitted from the air conditioning system of the vehicle. This is to prevent the resonance of the duct part 120 by varying the natural frequency of the duct part 120.

Here, the resonance of the duct part 120 means that the main frequency of the vibration transmitted during the operation of the air conditioning system of the vehicle and the natural frequency of the duct part 120 itself coincide with or close to each other so that the magnitude of the forced vibration becomes almost infinite. Say the phenomenon.

In particular, when the frequency of the delivered air conditioning system coincides with or approaches the first natural frequency of the duct part 120, the most serious structural damage or loud noise is required, and thus it is necessary to prevent the problem.

Therefore, in the modified example of the present invention, the two or more sealing bodies spaced apart from each other in the outer direction of the opening end 122 are formed to be double-injected into the material as described above selected differently from each other to integrate with the duct part 120. By doing so, the natural frequency of the duct part 120 itself can be varied in various ways.

In addition, unlike the above, each of the two or more sealing bodies spaced apart from each other in the outer direction of the opening end 122 are formed in different shapes, that is, a cross-section of a polygon including a circle (130a), a star, a rectangle (130b), and the like. In addition, the natural frequency of the duct part 120 itself may also be varied in a double injection manner.

It is possible to effectively avoid the resonance that may occur in the duct 120 by changing the natural frequency of the duct 120 itself.

On the other hand, the sealing unit 130 according to another modified example of the present invention, as described above, is stronger with only one sealing structure with respect to the narrow circumferential expansion surface 123 without placing two or more sealing bodies in parallel. To be formed to form a sealing force, as shown in the enlarged view (b) of Figure 2, it may be implemented in a structure including a leaf spring 132 and a ring-shaped member 134 is an elastic material.

Here, the leaf spring 132 is a component of a corrugated plate structure that is inserted and seated in a ring-shaped insert groove 123a formed along the periphery of the open end 122 and elastically deformed by the pressing force in the vertical direction. And the ring-shaped member 134 is a component made of an elastic material that is in contact with the top surface of the leaf spring 132 inserted into the insert groove 123a and fitted into the insert groove 123a so that a part of the upper end thereof protrudes, the insert groove 123a. The leaf spring 132 may be inserted into a double injection method.

Coupling portion 140, the sliding pad guides the sliding coupling between the duct portion 120 and the duct 120 to gradually pressurize the sealing portion 130 is communicated between the air vent 112 and the open end 122 in a sealed state 2 to 5, as shown in Figure 2 to 5 may be configured to include a hook coupling portion 142, boss coupling portion 144, and the like.

The hook coupling portion 142 is a component that is formed to protrude from the rear of the crash pad 110, the crash pad 110 gradually in accordance with the insertion movement of the insertion plate 124 extending rearward from the opening end 122. Coupling groove 142a for guiding the pressing of the sealing unit 130 to the lower surface of the) may be provided. The hook coupling portion 142 may be arranged in parallel in the longitudinal direction of the opening end 122 so that the pressing on the sealing portion 130 disposed on the circumferential extension surface 123 can be made at the same level. have.

The coupling groove 142a smoothly guides the insertion of the fitting plate 124 through the open end portion widening along the sliding engagement direction SC, while guiding the fitting plate 124 upward through the inner narrow closed end. To guide the pressure on the sealing unit 130.

The boss coupling portion 144 is a component formed of a plurality of protrusions protruding from the front of the bottom surface of the crash pad 110, and fastening holes 125 formed in front of the opening end 122 in accordance with the insertion movement of the fitting plate 124. It is inserted into the) and is fixed to support the pressure of the sealing unit 130.

The boss coupling portion 144 may also be arranged in parallel along the longitudinal direction of the opening end 122 so that the pressing fixing to the sealing portion 130 disposed long on the circumferential extension surface 123 can be made at the same level. Can be.

In this case, the sliding coupling direction SC of the crash pad 110 is not a direction parallel to the circumferential extension surface 123 of the duct part 120 in which the sealing part 130 is double-injected, but a duct part ( It is made in the diagonal direction with respect to the circumferential expansion surface 123 of the 120.

The sliding coupling direction SC of the crash pad 110 is to avoid the pressing against the sealing unit 130 while being swept in the horizontal direction, and the sealing unit 130 with the minimized frictional resistance from the top to the bottom. By pressurizing to prevent the damage to the sealing unit 130.

As shown in FIGS. 3 and 4, the boss coupling part 144 and the hook coupling part 142 described above, which move relative to the duct part 120 along the sliding coupling direction SC of the crash pad 110, As shown in FIG. 5, the movement is inhibited by the fastening hole 125 and the fitting plate 124, respectively, to complete the coupling between the duct part 120 and the crash pad 110 and simultaneously press the sealing part 130. The communication between the opening end 122 and the air vent 112 in a sealed state through the).

As the coupling between the crash pad 110 and the duct part 120 is smoothly guided through the coupling part 140 as described above, the rigidity between the circumferential extension surface 123 of the duct part 120 and the crash pad 110 is strong. Sealability may be simultaneously achieved during the assembly process between the crash pad 110 and the duct 120 without the frictional resistance of the sealing portion 130.

While specific embodiments of the invention have been described and illustrated above, it is to be understood that the invention is not limited to the described embodiments, and that various modifications and changes can be made without departing from the spirit and scope of the invention. It is self-evident to those who have. Therefore, such modifications or variations are not to be understood individually from the technical spirit or point of view of the present invention, the modified embodiments will belong to the claims of the present invention.

10: Conventional Attachable Sealing Pad
100: crash pad duct assembly having a sealed coupling structure
110: crash pad 112: air vent
120: duct portion 122: opening end
123: circumferential surface 123a: insert groove
124: fitting plate 125: fastener
130: sealing part 130a, 130b: first and second sealing body
132: leaf spring 134: ring-shaped member
SC: sliding engagement direction 140: coupling portion
142: hook coupling portion 142a: coupling groove
144: boss coupling

Claims (2)

A crash pad having at least one air vent adjacent to the window;
A duct part provided at a lower portion of the crash pad to send air of the vehicle air conditioning system to the window through an opening end communicating with the blower;
Sealing portion of the elastic material protruding in a ring shape along the circumference of the opening end by double injection so as to be integral with the duct portion; And
It includes a coupling portion for guiding the sliding coupling between the crash pad and the duct portion and gradually pressurizing the sealing portion to communicate between the blower opening and the opening end in a sealed state,
The sealing unit,
It is composed of two or more sealing bodies spaced apart in the circumferential direction of the opening end and arranged in parallel,
The two or more sealing bodies,
In response to the disturbance vibration transmitted from the air conditioning system, each of the double injection into the material to prevent the resonance by varying the natural frequency of the duct itself,
The coupling part,
A plurality of dogs are formed to protrude from the rear of the lower surface of the crash pad, the coupling groove is provided to guide the pressing of the sealing portion against the lower surface of the crash pad gradually in accordance with the insertion movement of the insertion plate extending rearward from the opening end Hook coupling portion; And
A plurality of protrusions are formed to protrude from the front of the bottom of the crash pad, and includes a boss coupling portion that is fitted to the fastening hole formed in front of the opening end in accordance with the insertion movement of the fitting plate to support the pressing of the sealing portion Crash pad duct assembly having a hermetic coupling structure.
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