JPH0710192Y2 - Vehicle register structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a register structure attached to an instrument panel of an automobile.

(Prior Art) Conventionally, as a structure of this type of register 1, as shown in FIG. 6, a bezel 2 having a substantially rectangular shape, a barrel 3 attached to a front portion of the bezel 2 and a rear portion of the bezel 2 are rotated. A damper 5 is rotatably provided via a shaft 4, and a damper opening / closing mechanism (not shown) for opening / closing the damper 5 is provided on a side portion of the bezel 2. By operating the opening / closing mechanism, the damper 5 is opened. The opening / closing angle of is adjusted between the fully open position a and the closed position b to adjust the amount of air blown into the passenger compartment. The damper 5 is formed in a plate shape with synthetic resin or the like, and the four circumferences are soft. A tamper seal 6 made of rubber or the like is attached, and at the closing position b, the damper seal 6 is elastically pressure-bonded to the inner peripheral wall surface of the bezel 2 to be closed.

However, when the damper opening / closing mechanism is operated in the register 1 to rotate the damper 5 to the closing position b side and the damper 5 is positioned at the opening position c at which the opening of the bezel 2 is not completely closed, the upper edge of the damper 5 shown in the figure. The 5a side is positioned with an acute angle gap t1 with respect to the upper wall of the bezel 2, and the lower edge 5b side is positioned with an obtuse angle gap t2. Most of the air is guided by the damper 5 and the gap t1
The flow velocity flowing to the side and flowing through this gap t1 increases. For this reason, since the damper seals 6 attached to the four circumferences of the tamper 5 are made of soft rubber, for example, urethane foam, there is a problem that the damper seals 6 on the side of the gap t1 vibrate and generate whistling noise. . Japanese Utility Model Laid-Open No. 1-90605 discloses a technique for preventing the generation of this whistling sound. The technical content disclosed in this publication is, as shown in FIGS. 7 and 8, a seal member 12 provided on the side edge 11a side of a damper 11 located at least on the downstream side in the air flow direction of an air duct 10. The damper is installed along the rotation trajectory.
The damper is provided between the closing position b of 11 and the position c immediately before it.
One side wall of the air duct 10 so that 11 sealing members 12 can be slidably contacted
10a is squeezed inward to form an inclined portion 13 having a rubbing surface 13a,
Alternatively, the tilting member 14 having a separate rubbing surface 14 is provided inside the same side wall 10a.

(Problems to be Solved) However, although the whistling sound can be prevented by the technical contents disclosed in this publication, one sidewall 10a of the air duct 10 is prevented.
Is squeezed inward to form an inclined portion 13 having a sliding surface 13a, or an inclined member 14 having a separate sliding surface 14 is provided inside the same side wall 10a. There is a problem in that the pressure loss increases because the width is narrowed significantly.

The present invention has been made to solve the above conventional problems, and an object of the present invention is to provide a vehicular register structure capable of significantly reducing whistling noise and not increasing pressure loss. It is a thing.

(Means for Solving the Problems) In order to solve the above technical problems, the present invention provides a damper that is rotatably supported by a bezel and is rotated between an open position for fully opening the bezel and a closed position for fully closing the bezel. In the register attached with, in addition to a soft tamper seal elastically pressure-bonded to the inner wall surface of the bezel is attached to the four circumferences of the damper,
A curve that follows the trajectory line on the trajectory line of the tip of the damper seal on the damper side edge that is on the downstream side with respect to the air flow in the bezel, and within the range of the damper closing position and the damper angular position at the initial stage of whistling sound generation. A vehicle register in which a substantially triangular plate-shaped damping rib whose surface is a hypotenuse is provided so as to project in parallel with the air flow at a substantially central portion of a wall surface of a bezel facing the damper side edge on the downstream side. Exists in structure.

(Operation) According to the present invention, by virtue of the above-mentioned configuration, the damper seal is brought into contact with the protruding tip of the damping rib at a position slightly before the initial opening position at which the whistling sound is generated, and the substantially central portion of the damper seal comes into contact. When rotated, the tip edge of the damper seal functions so as to be expanded and expanded in the left-right direction centering on the central portion thereof so as to be inclined with respect to the air flow.

(Embodiment) Next, an embodiment of the present invention will be described with reference to the drawings. In the drawing, reference numeral 21 is a register, which has the same configuration as the conventional register 1 and has a substantially rectangular shape. Bezel 22 and bezel attached to the front of this bezel 22
A damper 25 is provided rotatably at the rear of the bezel 22 via the rotary shaft 24, and a damper opening / closing mechanism for opening / closing the damper 25 is provided on the side of the bezel 22 although not shown.
By operating the opening / closing mechanism, the opening / closing angle of the damper 25 is adjusted between the open position a and the closed position b to adjust the amount of air blown into the vehicle interior. The damper 25 is formed in a plate shape with synthetic resin or the like. A tamper seal 26 made of soft rubber or the like is attached to the four circumferences, and the damper seal 26 is configured to be elastically pressure-bonded to the inner peripheral wall surface of the bezel 22 to close at the closing position b. Register 21 configured in this way
On the wall surface 22a side to which the damper seal 26 at the side edge 25a side, which is the downstream side of the blower 25, is elastically pressure bonded, there is a curved surface 27a that substantially follows the tip locus line P of the damper seal 26 on the side edge 25a side. In addition, a vibration damping rib 27 having a predetermined thickness and a substantially triangular shape and a plate shape is formed in a substantially central portion of the wall surface 22a so as to project its curved surface 27a upstream and in parallel with the air flow V. There is. Also,
The height h of the hanging piece 27b of the damping rib 27 is set by the whistle sound generation range of the register 21, that is, the opening position c of the damper 25 at the initial stage of the whistle sound generation. The curved surface 27a of the vibration damping rib 27 is provided at a position slightly inside the trajectory line P.

In the register 21 configured as described above, when the damper 25 is now rotated from the open position a to the closed position b, the curved surface 27a of the damping rib 27 is slightly inward of the trajectory line P. Since it is provided, the damper seal 26 on the side edge 25a side of the damper 25 is slightly in front of the initial open position c at which the whistling sound is generated, and its substantially central portion is brought into contact with the protruding tip portion of the damping rib 27. Further, when the damper seal 26 is further rotated, the tip end edge of the damper seal 26 is deformed to the open / closed shape in the lateral direction centering on the central portion as shown in FIG. Then, the damper seal 26 is elastically pressure-bonded to the wall surface 22a and the bezel 22 is closed at the closing position b where the sliding contact is rotated while maintaining the open and expanded state, and the sliding contact with the curved surface 27a is released. As described above, the damper seal 26 is in a state in which the central portion of the tip of the damper seal 26 slidably contacts the curved surface 27 of the vibration damping rib 27 in the whistle-blowing sound generation angle range, and the edge portion is deformed in an expansive shape in the lateral direction from the central portion. Since the damper seal 26 is rotated while being maintained, the tip edge portion of the damper seal 26 has almost no portion which is oblique and is positioned at a right angle to the air flow V. Therefore, local vibration of the edge portion is suppressed. As a result, the generation of whistling noise can be significantly reduced. Further, since the vibration suppressing rib 27 is provided at one place in the central portion of the wall surface 22 of the bezel 22, the opening area is hardly reduced, so that no pressure loss occurs.

4 and 5 are the experimental results of measuring the change of the noise spectrum with the damper angle of the register by a certain device, and FIG. 4 shows the case where the damping rib is not attached, and FIG. When a rib is attached, the vertical axis shows the noise level and the horizontal axis shows the frequency.The bottom of the figure shows the state where the opening angle is gradually closed with the damper fully open. In the case of FIG. 4, a number of sharp peaks (whistle sounds) H are observed as the damper is closed. Further, when the damping rib 27 of FIG. 5 is provided, no distinctive peak H is observed in the spectrum, and no whistle blowing sound is observed.

(Effects of the Invention) With the present invention having the above-described configuration, the damper seal has the central portion of the tip slidingly contacting the curved surface of the damping rib in the whistling sound generation angle range, and the edge portion in the left-right direction from the central portion. Since it is rotated while maintaining the state of being expanded and expanded, the tip edge of the damper seal has almost no oblique and right-angled portion with respect to the air flow. It is possible to suppress local vibrations and significantly reduce the generation of whistling sounds. Further, since this damping rib is provided at one place in the central portion of the wall surface of the bezel, the opening area is hardly reduced, so that no pressure loss occurs.

[Brief description of drawings]

The drawing shows one embodiment of the present invention. Fig. 1 is a longitudinal sectional view of a register, Fig. 2 is a sectional view taken along the line II-II of Fig. 1, Fig. 3 is an explanatory view of operation, and Fig. 4 is an experimental apparatus. Fig. 5 is a graph showing the change in the noise spectrum with the damper angle of the register without the damping rib attached by Fig. 5, Fig. 5 is a graph showing the change in the noise spectrum with the damper angle of the register provided with the damping rib with the experimental device, 6 to 8 are conventional examples. 21 …… Register, 22 …… Bezel 22a …… Bezel wall, 25 …… Damper 25a …… Damper side edge, 26 …… Damper seal 27 …… Damping rib, 27a …… Curved surface a …… Open position, b: Closed position c: Damper angle position at the beginning of whistling sound generation P: Trace line of damper seal tip V: Air flow

Claims (1)

[Scope of utility model registration request] 1. A register, which is rotatably supported by a bezel and is provided with a damper for pivoting the bezel to an open position for fully opening and a closed position for fully closing the bezel, wherein the damper is provided with an inner portion of the bezel on four sides thereof. A soft tamper seal that elastically press-bonds to the wall surface is attached, and the closed position of the damper and whistle noise are generated on the trajectory line of the tip of the damper seal on the side edge of the damper that is downstream with respect to the air flow in the bezel. Within the initial damper angular position, a substantially triangular plate-shaped damping rib having a curved surface that follows the locus line as a hypotenuse is provided in the center of the wall surface of the bezel facing the damper side edge on the downstream side. A vehicle cash register structure configured to project in parallel with the flow.