JP2007010272A - Noise prevention device for fin-shut resistor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a noise prevention device for a fin-shut resistor capable of being manufactured at a low cost without increasing assembly man-hour. <P>SOLUTION: In a bezel 5 on which a front fin is mounted, a protruding panel parts 52, 53 protruding backward from upper and lower positions across an opening part 51 are formed and a plurality of hole parts 521, 531 are formed in the protruding panel parts 52, 53 along a longitudinal direction. Turbulent flow is generated around the front fin by making flow-in air escape from the hole parts 521, 531 of the protruding panel parts 52, 53 when the front fin closes the opening part 51 of the bezel 5 in a fully closed state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an abnormal noise prevention device for a fin shut resistor including a rear fin that can be rotated in the left-right direction and a front fin that can be tilted in the vertical direction, and the front fin can fully close the opening of the bezel. It is related with the noise prevention apparatus of the fin shut register | resistor which prevents the noise which a front fin generate | occur | produces in a fully-closed state, and is comprised.

  As is well known, a vehicle register has a front fin and a back fin so that the wind direction can be adjusted. The fin shut register is attached to the bezel so that the front fin can tilt so that the opening of the bezel can be fully closed.

  For example, according to Patent Document 1, a conventional fin shut register is driven and controlled so that a front fin can be fully closed when the shut damper is fully closed in a configuration having a shut damper. In other words, the fin shut register includes a front fin mounted on the bezel and a motor that rotationally drives the front fin. The front fin is connected to a link connected to the motor via a lever. The lever is arranged with the front fin pivotally supported, and a plurality of levers are pivotally supported by one link.

  On the other hand, a shut damper that sends or blocks the blown air forward is disposed at the rear of the retainer. The shut damper is disposed so as to be swingable by operation of the operation lever, and the switch is operated with the shut damper fully closed. When the switch is turned on, the motor operates to rotate the link, and the front fin is fully closed via the lever. As a result, since the air sent to the front fin that is fully closed does not come, it is possible to prevent the whistling sound that occurs when the front fin leaks.

  However, in the case of a fin-shut register having a shut damper, a fin-shut register of a type not having a shut damper or a fin-shut register having a shut damper is capable of preventing the above-mentioned abnormal noise. However, in order to reduce the cost, in the case of the fin shut resistor not interlocked with the shut damper, the air is sent with the front fin 7 fully closed as shown in FIG. In some cases, air leaks from the gap between the lowermost front fin 7 and the bezel 5 and interferes with the air blown out through the gap between the front fin 7 immediately above it to generate noise.

  In order to solve this problem, as shown in FIG. 6, a nonwoven fabric 20 as a cushioning material may be interposed below the lowermost front fin 7. As a result, the air leaking from the gap between the fins 7 and the bezel 5 is blocked by the interference between the fins 7 and the nonwoven fabric 20, so that abnormal noise can be prevented. However, attaching the nonwoven fabric 20 to the bezel 5 itself requires a new assembly process. In particular, when the instrument panel has a design opening, this assembly requires wearing a nonwoven fabric directly on the vehicle production line, which is difficult to assemble and takes time and increases the number of parts. It was connected.

Further, in Patent Document 2, in a register not equipped with a damper, a holding frame that is disposed on the inner peripheral surface of a cylindrical case and holds the fin is disposed around the fin. On the other hand, a bezel is disposed in front of the holding frame and a collar portion is formed so as to protrude forward. In the holding frame, a plurality of concave grooves arranged on the back side of the flange portion of the bezel are formed around the fins. Then, when the fin is fully closed, the air passing through the concave grooves interferes with the flange portion of the bezel and disturbs the vortex that tends to generate a whistling sound. It was supposed that the whistling noise could be prevented by disturbing the eddy current.
Japanese Patent Laid-Open No. 11-198646 (see pages 4 to 5 and FIG. 3) Japanese Patent Application Laid-Open No. 2004-051064 (see pages 4 to 7 and FIG. 4)

  However, although the register shown in Patent Document 2 has a concave groove on the holding frame side for disturbing the air flow, a space corresponding to the depth of the groove is required to form the concave groove. Therefore, there has been a problem in that the space becomes larger than in the case where there is no concave groove.

In view of the above problems, the present invention is a fin shut register of a type in which fins for adjusting the wind direction are separately arranged in the vertical direction and the horizontal direction. Therefore, the noise prevention device for the fin shut register according to the present invention is configured as follows. That is,
According to the first aspect of the present invention, a retainer that forms the air flow passage, a bezel that has an opening for arranging and blowing air in front of the retainer, and a wind direction in the vertical direction to close the opening of the bezel An anti-noise device for a fin shut resistor, comprising: a front fin that can be adjusted; and a rear fin that is arranged behind the front fin and capable of adjusting a wind direction in the left-right direction,
When the front fin is in a fully closed state, turbulent means for turbulent air blown at least below the lowermost front fin and reducing the wind speed is provided.

  The invention according to claim 2 is characterized in that the turbulent flow means is disposed below the front fin and forms a plurality of holes in a protruding plate portion formed in the bezel.

  According to the first aspect of the present invention, in the fin shut resistor noise prevention device, when the front fin fully closes the opening of the bezel, the air flowing below the front fin is disturbed by the turbulence means. By doing so, even if it interferes with the air leaking from the gap between the fins directly above, no abnormal noise is generated. Further, by providing the turbulent means, the flow velocity and the amount are reduced so as not to interfere with the air leaking from the front fin gap.

  According to the second aspect of the present invention, since the turbulent flow means has a large number of holes in the protruding plate portion formed in the bezel below the front fin, the front fin completely covers the opening of the bezel. When in the closed state, part of the air that flows into the lower portion of the front fin enters the hole and escapes downward. Although some air leaks from below the lower front fin, the flow velocity decreases and the amount decreases, so it is difficult to interfere with the wind leaking from the front fin gap directly above and prevent abnormal noise generation. can do. Further, since the turbulent means can be formed by the thickness of the bezel, no extra space is required.

  Since the noise prevention device for the fin shut register (hereinafter referred to as a register) of the present invention is an improvement particularly in the bezel part, the configuration other than the bezel part is not limited. In the following description, the outflow side of the register in the blowing direction, that is, the side on which the front fin is arranged is referred to as a front portion, and the inflow side in the blowing direction, that is, the direction opposite to the front fin is referred to as a rear portion.

  As shown in FIG. 1, the register 1 according to the embodiment is mounted on a case body that guides air flow, that is, a retainer 3 that is formed in a rectangular tube shape that is widened by opening front and rear portions, and a front opening of the retainer 3. The bezel 5 having the opening 51, the plurality of front fins 7 that are inserted into the opening 51 of the bezel 5 and supported by the bezel 5 in the horizontal direction, and the rear fin 7. And a plurality of back fins 9 that are pivotally supported by the bezel 5 in the vertical direction.

  As shown in FIG. 2, the bezel 5 is arranged so as to cover the front opening of the retainer 3, and has a rectangular main body that has an opening 51 in the center and is formed in a long lateral direction. It is formed to have a portion 50 and projecting plate portions 52 and 53 projecting rearward from the main body portion 50 at the upper and lower portions with the opening 51 therebetween. A plurality of hole portions 521 and 531 are formed in the protruding plate portions 52 and 53 along the longitudinal direction of the protruding plate portions 52 and 53 with appropriate intervals. The shape of the holes 521 and 531 is not particularly limited, but is formed in a round hole shape in the embodiment. Of course, it may be rectangular or elliptical.

  The protruding plate portions 52 and 53 are formed to extend to the vicinity of the inner fin 9 in order to close the insertion holes of the inner fin 9 and are fixed to the retainer 3 at the rear end portions of the protruding plate portions 52 and 53. The mounting plates 522 and 532 are formed to protrude rearward at two locations.

  The front fin 7 is formed in a laterally long plate shape, and is configured to be tiltable between two positions, a position P1 for opening the opening 51 of the bezel 5 and a position P2 for closing, as shown in FIG. ing. The position P1 at which the opening 51 of the bezel 5 is opened is a position before the tilted tip of the lowermost front fin 7 interferes with the lower-side protruding plate 53 of the bezel 5. The closing position P2 is a position where the front end portion of the lower front fin 7 tilted forward faces the lower end portion of the immediately preceding front fin.

  The tilting drive mechanism of the front fin is not particularly limited and is not illustrated. However, the configuration shown in the prior art, for example, each lever that pivotally supports each front fin and each lever are connected. What is necessary is just to be comprised by one connecting rod and the drive mechanism which rocks and drives the said connecting rod including the operation knob for front fins.

  The rotation driving mechanism of the back fin 9 is not shown in the figure, but may be configured so that all the back fins 9 can be rotated in the horizontal direction simultaneously by operating with the operation knob for the back fin. For example, there is no particular limitation.

  Next, the operation of the register 1 configured as described above will be described.

  Since the register 1 does not have a shut damper behind the retainer 3, the air blown toward the register 1 is always guided to the inside of the retainer 3. When adjusting the wind direction, the front fin operating knob (not shown) is operated to tilt the front fin 7 up and down at an appropriate angle to open the opening 51 of the bezel 5 and to operate the back fin operating knob. Then, the back fin 9 is rotated to an appropriate angle. As a result, the blown air is sent in an appropriate direction in the vehicle.

  Next, when stopping the blowing into the vehicle, the front fin operating knob is operated to tilt the front fin 7 forward to the maximum. Then, all the front fins 7 are tilted in the substantially vertical direction, and the openings 51 of the bezel 5 are fully closed. At this time, the air blown into the retainer 3 is sent toward the front fin 7 as shown in FIG. 4, but a part of the air collides with the front fin 7 and swirls to become a turbulent flow. The part leaks into the passenger compartment through the gap between the front fins 7 adjacent in the vertical direction.

  On the other hand, a part of the air collides with the front fin 7 and a part of the air flows downward from the hole 531 formed in the protruding plate part 53 of the bezel 5 and escapes. As a result, turbulence occurs around the front fin 7. A part of the air leaks into the vehicle compartment through the gap between the main body 50 of the bezel 5 and the lower end of the lowermost front fin 7, but the flow rate is reduced and the amount of leakage is reduced. Leaked air will be reduced in momentum. Therefore, the whistling sound is prevented because it flows into the vehicle interior without interfering with the air leaked from the front fin 7 immediately above.

  In addition, the air directed toward the upper part of the bezel 5 is also acted in the same manner, and a part of the air flows upward through the hole 521 of the protruding plate part 52 and escapes, and the turbulent flow around the front fin 7 Therefore, even if air leaks into the vehicle from between the uppermost front fin and the main body portion 50 of the bezel 5, the momentum of the leaked air is reduced, and the whistling sound can be prevented.

  As described above, according to the register 1 of the embodiment, when the front fin 7 fully closes the opening 51 of the bezel 5, a part of the air flowing through the register 1 is part of the protruding plate portion 53 of the bezel 5. Turbulence is generated by flowing downward (or upward) through the hole 531 (or 521) formed in (or 52). As a result, the momentum of air that leaks into the vehicle from the lower (or upper) of the lowermost (or uppermost) front fin 7 decreases, and the air that leaks from the upper fin (7) immediately above (or directly below) flows. Since it does not interfere, the whistling sound can be prevented.

  In addition, in the abnormal noise prevention apparatus of the fin shut resistor of this invention, it is not limited to the above-mentioned form, Another thing may be sufficient as the turbulent flow means which forms a hole in a protrusion board part.

  For example, the protruding plate portion may be formed in a wave shape along the longitudinal direction or the short side direction so as to generate turbulent flow, and the guide plate that directs the air flowing toward the front fin downward or upward May be provided.

It is a simplified sectional view showing a register. It is a perspective view which shows the noise prevention apparatus of this invention formed in the bezel. It is a partially expanded sectional view of FIG. It is a partial cross section figure which shows the effect | action of the flow of air. It is a partial cross section figure which shows the flow of the air in the conventional register | resistor. It is a partial cross section figure which shows the form which took the conventional countermeasure against abnormal noise.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Resistor 3 Retainer 5 Bezel 51 Opening part 52 Projection board part 521 Hole part 53 Projection plate part 531 Hole part 7 Front fin 9 Back fin

Claims (2)

A retainer that forms an air flow path, a bezel that has an opening for blowing air that is disposed in front of the retainer, and a front fin that can adjust the wind direction in the vertical direction to close the opening of the bezel; An abnormal sound prevention device for a fin shut register, comprising a rear fin disposed behind the front fin and capable of adjusting a wind direction in a left-right direction,
Providing turbulence means for turbulent air blown at least below the lowermost front fin and reducing wind speed when the front fin is in a fully closed state, preventing abnormal noise of the fin shut register apparatus.   2. An apparatus for preventing abnormal noise in a fin shut resistor according to claim 1, wherein the turbulent flow means is disposed below the front fin and forms a plurality of holes in a protruding plate portion formed in the bezel.

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