JP2013083423A - Connection structure of air blow-off device and duct - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a connection structure of an air blow-off device and a duct capable of achieving cost reduction while preventing a leakage of air from a connection part by connecting the air blow-off device to the duct with an excellent sealing property without performing special sealing work to the connection part between the air blow-off device and the duct even in the blocked state of a flow passage of the air blow-off device by a damper.SOLUTION: The internal pressure of a retainer 2 and the duct 15 is increased based on the air flowing into the air blow-off device from an air conditioner via the duct 15 in the blocked state of an air flow passage 11 of the retainer 2 through a damper plate 14 of a damper mechanism 12. Based on the duct 15 being formed of a flexible resin material, a projecting part 16 formed at a connection insertion part 15A of the duct 15 is deformed to bulge toward the inner peripheral wall 2D of a connection receiving part 2B of the retainer 2, and the projecting part 16 is brought into close contact with the inner peripheral wall 2D of the connection receiving part 2B of the retainer 2.

Description

  The present invention relates to a connection structure between an air blowing device having a damper for opening and closing an air flow passage and a duct for supplying air to the air blowing device, and particularly in a state where the flow passage of the air blowing device is closed by a damper. The present invention relates to a connection structure between an air blowing device and a duct that can prevent air from leaking out at a connecting portion by connecting the air blowing device and the duct with good adhesion.

Conventionally, various connection structures have been proposed for a connection structure between an air blowing device and a duct that feeds air into the air blowing device.
For example, in FIG. 5 of Patent Document 1 (Japanese Utility Model Publication No. 62-179551), the opening end of the duct facing the opening end of the register is expanded, and the opening end of the register is used as the opening opening end of the duct. And a duct connection structure in which an annular elastic seal member is interposed between an outer peripheral surface and an inner peripheral surface of both opening ends (conventional example 1).

  Moreover, in FIG. 1 of patent document 1, while forming a protrusion on the inner peripheral surface of the connection opening end of the duct, a groove is formed on the outer peripheral surface of the connection opening end of the register, and the protrusion is strongly pressed into the groove. The inserted duct connection structure is described (conventional example 2).

  Further, in FIG. 3 of Patent Document 1, an annular protrusion is formed on the outer peripheral surface of the opening end of the register, an annular groove is formed on the inner peripheral surface of the opening end of the duct, and the annular groove is formed on the annular protrusion. A duct connection structure in which is inserted is described (conventional example 3).

Japanese Utility Model Publication No. 62-179551

  By the way, the air blowing device (register) is generally provided with a damper mechanism that freely opens and closes the air flow passage. When the air is blown from the air blowing device, the damper mechanism causes the air flow passage to be opened. Is opened, and the air flow passage is closed by the damper mechanism when the air blowing from the air blowing device is stopped.

  In the duct connection structure of the conventional example 1, an elastic seal member is interposed between the outer peripheral surface of the opening end of the register and the inner peripheral surface of the expanded opening end of the duct. Costs and assembly costs are inevitably generated, and the cost of the connection structure itself increases. Further, when the damper mechanism provided in the register is closed, a gap is formed between the inner wall surface of the bulge opening end of the duct and the seal member due to an increase in air internal pressure in the duct. And air leaks from the gap. In particular, when the seal member is made of a foamable material, air leaks from the gap and air leaks from the firing portion of the seal member.

Further, in the duct connection structure of the conventional example 2, when the damper mechanism of the resistor is closed, the connection open end of the duct is expanded due to the increase in the internal pressure of the air in the duct. A gap is generated between the protrusion formed on the inner peripheral surface of the connection opening end of the duct and the concave groove formed on the outer peripheral surface of the connection opening end of the register, and air leaks from the gap.
. In particular, the duct is generally blow-molded, and in such blow molding, it is difficult to obtain the dimensional accuracy of the inner peripheral surface of the duct, and the inner peripheral surface of the connection opening end of the duct and the connection opening end of the resistor are difficult to obtain. Since a gap is easily generated between the outer peripheral surface and the damper mechanism of the register, the protrusion formed on the inner peripheral surface of the connection opening end of the duct and the outer peripheral surface of the connection opening end of the register are formed. There is a high possibility that air leaks from other gaps in addition to the gap between the concave grooves.

  Furthermore, in the duct connection structure of the conventional example 3, it is necessary to fit the annular groove at the opening end of the duct into the annular protrusion at the opening end of the register, and the assembly work of both is complicated and troublesome. Also, when the damper mechanism of the resistor is closed, the connection opening end of the duct is enlarged due to the increase in the internal pressure of the air in the duct. As a result, the annular protrusion of the resistor and the annular shape of the duct are increased. A gap with the concave groove is generated, and air leaks from the gap. In particular, ducts are generally blow-molded. In such blow-molding, it is difficult to obtain the dimensional accuracy of the inner peripheral surface of the duct, and the inner peripheral surface of the opening end of the duct and the outer peripheral surface of the opening end of the register are difficult. When the resistor damper mechanism is opened, an annular groove formed on the inner peripheral surface of the opening end of the duct and an annular surface formed on the outer peripheral surface of the opening end of the register are formed. There is a high possibility that air leaks from other gaps in addition to the gap between the grooves.

  The present invention has been made in order to solve the above-described problems, and a special sealing process is applied to the connection portion between the air blowing device and the duct even when the air flow passage of the air blowing device is closed by the damper. Without connecting the air blowing device and the duct with good adhesion by utilizing the increase of the internal pressure of the air in the duct while supplying air from the duct to the air blowing device. An object of the present invention is to provide a connection structure between an air blowing device and a duct that can prevent air from leaking at a connecting portion and can realize cost reduction.

  A connection structure between an air blowing device and a duct according to claim 1 is a connection structure between an air blowing device having a damper that opens and closes an air flow passage and a duct that sends air to the air blowing device. A cylindrical connection receiving portion formed at the end and expanded in diameter; a cylindrical connection insertion portion formed at the end of the duct and fitted into the connection receiving portion of the retainer; A projection formed on the outer periphery of the connection insertion portion and having the same thickness as the cylindrical connection insertion portion, and the connection insertion portion of the duct in which the projection is formed is connected to the retainer. The protrusion is formed of a resin material that is more flexible than the portion, and the projecting portion allows air to flow from the duct toward the air blowing device with the air flow passage of the air blowing device closed through the damper. Air in the duct as it flows in By the internal pressure is increased, characterized by contact bulges toward the inner circumferential wall of the connection receiving portion of the retainer.

Here, as described in claim 2, in the connection structure between the air blowing device and the duct, the retainer having the connection receiving portion is formed of a resin material, and the tensile elastic modulus of the resin material is 380 to 380. in the range of 600 kgf / cm ^3, the tensile modulus of the resin material for forming the duct is preferably in the range of 300~390kgf / cm ^3.

In the connection structure between the air blowing device and the duct according to claim 1, the connection insertion portion of the duct in which the protruding portion is formed is formed from a resin material that is more flexible than the connection receiving portion of the retainer. When the air flows from the duct toward the air blowing device with the air flow passage of the air blowing device closed via the damper, the internal pressure of the air increases in the duct, so that the retainer connection receiving portion It bulges toward the inner peripheral wall of and adheres closely. At this time, the connection receiving portion of the retainer is not deformed because it is formed from a hard resin material. Thereby, even in the state where the flow passage of the air blowing device is closed by the damper, air is supplied from the duct to the air blowing device.
In the meantime, it is possible to prevent the air from leaking out at the connecting portion by connecting the air blowing device and the duct with good adhesion utilizing the increase in the internal pressure of the air in the duct. In addition, since the air blowing device and the duct can be connected with good adhesion without performing a special sealing process on the connection portion between the air blowing device and the duct, it is possible to reduce the cost.

It is a perspective view of the connection structure of the air blowing apparatus and duct which concerns on this embodiment. It is a schematic cross section of the connection structure of an air blowing device and a duct.

DESCRIPTION OF EMBODIMENTS Hereinafter, a connection structure between an air blowing device and a duct according to the present invention will be described based on embodiments embodying the present invention with reference to the drawings.
In FIG. 1, an air blowing device 1 is a device arranged on the passenger side (passenger seat side) in an instrument panel of a vehicle. The air blowing device 1 is basically an air blowing device 1. And the bezel 3 disposed on the front side of the retainer 2.

A plurality of sheets (FIG. 1) in which the lower shaft 4 is rotatably supported by the support plate 5 and the upper shaft is rotatably supported by a support plate (both not shown) on the front side of the retainer 2. In this case, five vertical fins 6 are arranged. Further, a known link mechanism is provided at the rear part of each vertical fin 6, and each vertical fin is interposed via the link mechanism by operating the operation knob 7 provided on the left vertical fin 6 in the left-right direction. Thus, it is configured to be rotatable in the left-right direction.
At the rear of each vertical fin 6, a horizontal fin mechanism having a plurality of horizontal fins is disposed inside the retainer 2, and each horizontal fin is configured to be integrally rotatable in the vertical direction. Yes. Since such a horizontal fin mechanism is known, the description thereof is omitted here.

  An air outlet 8 is formed in the bezel 3, and air is blown out from the air outlet 8 toward the occupant while changing various blowing directions based on the air guiding action of the horizontal fin mechanism and each vertical fin 6. The In addition, a rotary knob 9 is disposed below the air outlet 8 of the bezel 3, and the rotary knob 9 is used when a damper mechanism 12 (see FIG. 2) is rotated. .

As shown in FIGS. 1 and 2, the retainer 2 is formed in a cylindrical shape having a square cross section from a relatively hard resin material such as ABS resin, and has a diameter larger than that of the damper arrangement portion 2A and the damper arrangement portion 2A. Connection receiving part 2B. As such a resin material, a material having a tensile elastic modulus in the range of 380 to 600 kgf / cm ³ is used.
The damper disposition portion 2A of the retainer 2 is provided with an air flow passage 11 therein based on its cylindrical shape, and the rotary knob 9 described above is provided on the downstream side (right side in FIG. 2) of the air flow passage 11. A damper mechanism 12 that opens and closes the air flow passage 11 based on the rotation operation is provided.

  The damper mechanism 12 has a damper plate 14 that is rotatably supported in a range of 90 degrees around the rotary shaft 13, and this damper plate 14 is in the vertical position (shown by a solid line) shown in FIG. The flow passage 11 is shielded, and the air flow passage 11 is opened at a horizontal position (indicated by a dotted line).

A cylindrical duct 15 formed from a resin material is connected to the connection receiving portion 2B of the retainer 2 configured as described above. The duct 15 is connected to an air conditioner (not shown), and supplies air sent from the air conditioner to the air blowing device 1 via the retainer 2. Here, as the resin material for forming the duct 15, a resin material that is more flexible than the connection receiving portion 2 </ b> B of the retainer 2 is used, for example, polypropylene having a tensile elastic modulus in the range of 100 to 390 kgf / cm ³ . Material is used.

  A connection insertion portion 15A that is inserted into the connection receiving portion 2B of the retainer 2 is formed at the end portion of the duct 15 (the right end portion in FIGS. 1 and 2). At a substantially central portion in the length direction of the connection insertion portion 15A, a protrusion 16 is formed over the outer periphery of the connection insertion portion 15A with the same thickness as the connection insertion portion 15A.

  As shown in FIG. 2, in the connection insertion portion 15A, a bent portion 15B that is bent toward the center of the connection insertion portion 15A is formed on the downstream side (right side in FIG. 2) of the protruding portion 16. The center side end of the bent portion 15B is formed at the same level as the inner wall surface 2C of the damper arrangement portion 2A of the retainer 2. This is because, when air flows from the duct 15 through the connection receiving portion 2B into the damper arrangement portion 2A, a loss occurs in the air flow so that turbulence does not occur at the connection portion between the damper 15 and the retainer 2. This is to prevent this.

  In a state where the duct 15 is connected to the air blowing device 1 as described above, the rotary knob 9 is operated so that the damper plate 14 of the damper mechanism 12 arranged in the damper arrangement portion 2A is parallel to the air flow ( 2, the air flow passage 11 of the retainer 2 is opened, and the air supplied from the retainer 2 through the duct 15 from the air conditioner blows out from the air outlet 8 of the bezel 3 toward the occupant. Is done.

  On the other hand, when the rotary knob 9 is operated in the reverse direction and the damper plate 14 of the damper mechanism 12 arranged in the damper arrangement portion 2A is arranged at a position perpendicular to the air flow (solid line position in FIG. 2), The air flow passage 11 of the retainer 2 is closed, and the air supplied from the retainer 2 through the duct 15 from the air conditioner is blocked by the damper plate 14.

  At this time, the internal pressure of the retainer 2 and the duct 15 increases due to the air flowing from the air conditioner through the duct 15 toward the air blowing device. When the internal pressure of the retainer 2 and the duct 15 increases as described above, the protrusion 16 formed in the connection insertion portion 15A of the duct 15 is formed by the duct 15 being formed from a flexible resin material. Based on this, the deformation is bulged and deformed toward the inner peripheral wall 2D of the connection receiving portion 2B of the retainer 2. At this time, the retainer 2 is not deformed because it is formed of a hard resin material.

  As a result, the projecting portion 16 is brought into close contact with the inner peripheral wall 2D of the connection receiving portion 2B of the retainer 2, and the duct 15 can be used even when the air flow passage 11 of the retainer 2 is closed by the damper plate 14 of the damper mechanism 12. While the air is being supplied to the air blowing device 1, the retainer 2 and the duct 15 can be connected with good adhesion by utilizing the increase in the internal pressure of the air in the duct 15. As a result, it is possible to prevent air from leaking out at the connecting portion between the retainer 2 and the duct 15. In addition, the retainer 2 of the air blowing device 1 and the duct 15 can be connected with good adhesion without performing a special sealing process on the connecting portion of the retainer 2 of the air blowing device 1 and the duct 15. Can be reduced.

  Note that the present invention is not limited to the above-described embodiment, and various improvements and modifications can be made without departing from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Air blowing apparatus 2 Retainer 2B Connection receiving part 2D Inner peripheral wall of a connection receiving part 11 Air flow path
12 Damper Mechanism 14 Damper Plate 15 Duct 15A Connection Insertion 16 Projection

Claims (2)

In the connection structure of the air blowing device having a damper for opening and closing the air flow passage and the duct for sending air to the air blowing device,
A cylindrical connection receiving portion formed at the end of the retainer of the air blowing device and expanded in diameter;
A cylindrical connection insertion portion formed at the end of the duct and inserted into the connection receiving portion of the retainer;
A projecting portion formed over the outer periphery of the connection insertion portion with the same thickness as the cylindrical connection insertion portion;
The connection insertion portion of the duct in which the protruding portion is formed is molded from a resin material that is more flexible than the connection receiving portion of the retainer,
When the air flows from the duct toward the air blowing device in a state where the air flow passage of the air blowing device is blocked via the damper, the internal pressure of the air increases in the duct. A connection structure between an air blowing device and a duct, which bulges toward the inner peripheral wall of the connection receiving portion of the retainer and comes into close contact therewith. The retainer having the connection receiving portion is molded from a resin material, and the tensile elastic modulus of the resin material is in the range of 380 to 600 kgf / cm ³ .
2. The connection structure between the air blowing device and the duct according to claim 1, wherein a tensile elastic modulus of the resin material forming the duct is in a range of 300 to 390 kgf / cm ³ .

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