JP3497819B2 - Vehicle ventilator - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilator for blowing air into a vehicle cabin. [0002] Vehicle instrument panels and the like include:
A ventilator is provided for blowing fresh outside air or air-conditioned air at an optimum temperature into the vehicle interior space.
As this type of ventilator, for example, Japanese Patent Application Laid-Open No. 10-1
As known from Japanese Patent Application Publication No. 09533, a shutter valve that is rotatable by a rotation shaft is disposed inside a blowable cylindrical case provided with a wind direction control unit at an outlet. . An inner end of a ring-shaped seal is inserted into a groove formed on a peripheral edge of the shutter valve, and an outer end of the seal projects outside from the groove. [0003] The shutter valve can adjust the air volume by rotating it to an arbitrary angle, and can rotate the shutter valve to the maximum so that the seals at both ends of the shutter valve abut against the opposing inner surfaces of the case. The case can be fully closed. [0004] However, in such a conventional ventilator, when the shutter valve is controlled to a position just before fully closed, a gap between the tip of the seal and the inner surface of the case is provided. , The flow velocity of the air passing therethrough increases, and the pressure of the air may cause the shutter valve seal to be pulled out of the groove and vibrate, thereby generating abnormal noise. The present invention has been made by paying attention to such a conventional technique, and provides a vehicle ventilator capable of preventing generation of abnormal noise due to vibration of a seal. Means for Solving the Problems The invention according to claim 1 is:
A shutter valve for air volume adjustment is rotatably arranged inside a cylindrical case capable of blowing air by a rotation shaft, and is formed in a ring shape in a groove formed in an endless peripheral edge formed in the shutter valve. While inserting the inner part of the seal, the outer part of the seal is projected from the groove to the outside,
What is claimed is: 1. A vehicle ventilator in which seals at both ends of a shutter valve abut on opposing inner surfaces of a case when a shutter valve is rotated to completely close the case, wherein an inner wall on one side in a groove of the shutter valve is provided. the, the seal engaged with the sea <br/> Le is a projection-like latching means for preventing from being withdrawn from the groove, formed in the shutter valve integrally, within the groove of the shutter valve Others facing the protrusion
On the inner wall on one side, a window is formed to expose the seal,
The inner part of the seal exposed from the part, from the terminal of the inner part
While forming the knob part which is extended partially,
A concave portion for accommodating the knob portion is formed in a bottom portion . According to the first aspect of the present invention, the projection formed in the groove of the shutter valve having an endless peripheral edge.
A locking means, like for bite into the projections on the seal
In this state, the seal can be prevented from being pulled out, and the seal can be held by the endless peripheral edge. Therefore, even when the shutter valve is controlled to a position just before the fully closed position, the seal can be prevented. Does not vibrate and no noise is generated. Further, since the locking means is formed integrally with the shutter valve, the number of parts does not increase. Pull the inside of the seal from the window into the groove.
Work to engage with the projection
Can be checked from the window. Inside the seal
Since the knob part is formed in the part, the seal from the window part
Work to pull the inner part into the groove and engage with the protrusion,
It becomes easier to perform. After the work to engage with the projection,
The knob is housed in the recess formed at the bottom of the groove
As a result, the knob part is fluttered and the seat
It does not affect your condition. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. Preferred embodiments will be described with reference to the drawings. FIGS. 1 to 6 show an embodiment of the present invention. FIG. 1 shows an overall view of a ventilator 1 according to this embodiment. The ventilator 1 is installed on an instrument panel of an automobile (not shown). FIG. 2 is an exploded perspective view of the ventilator 1. Reference numeral 2 denotes a case, which has a rectangular tube shape capable of blowing air, and supplies fresh outside air or air-conditioned air A (FIG. 6) carried from a duct (not shown) connected to the rear end opening.
Air can be blown toward the front end opening 2a. Case 2
A finisher 3 is attached to the front end opening 2a, and a horizontal louver 4 and a vertical louver 5 as "wind direction control units" are attached thereto. A side differential case 6 is attached to an upper portion of the case 2. The finisher 3 is flush with the instrument panel. Pin 7 on the lower surface of front end opening 2a of case 2
Has a dial 8 for controlling the vertical louver 5 attached by a spacer 9 and a screw 10. The pin 12 of the vertical louver 5 is engaged with the fork 11 of the dial 8 and controlled. A boss 13 formed on the side surface of the case 2
At 14, another dial 15 and link 16 are attached by spacers 9 and screws 10, respectively. This dial 1
The link 5 and the link 16 are linked by gears 15a and 16a. A long hole 17 is formed at the rear end of the link 16, and the projection 19 of the lever 18 is engaged therewith. The pin 20 formed near the gear 16 a of the link 16 engages with the hole 21 of the lateral louver 4, and
7 to control the lateral louver 4 by rotating within a margin. The square pin 22 of the lever 18 is inserted into a hole 23 of the case 2, and is inserted into a square hole 25 as a “rotation axis” of a shutter valve 24 provided in the case 2. The other end of the shutter valve 24 is rotatably supported by the case 2 by a circular pin (not shown). The shutter valve 24 has a substantially rectangular shape, and has a groove 26 at the top of an endless peripheral edge. A square ring-shaped sponge seal 27 is inserted into the groove 26. In the seal 27, only the inner portion is inserted into the groove portion 26, and the outer portion protrudes outward from the groove portion 26. The inner wall of the groove 26 on the square hole side has two
On the lower side, one projection 28 is formed as a "locking means". The projection 28 has an inclined surface on the outside and a vertical surface on the inside. The projection 28 is engaged with an opening 29 formed at a position corresponding to the seal 27. On the side of the groove 26 facing the projection 28, a window 30 for exposing the seal 27 in the groove 26 is formed. On the inner side of the seal 27 exposed from the window 30, a knob 31 partially extended from the center of the terminal is formed. At the bottom of the groove 26 in the window 30, a recess 32 for accommodating the knob 31 is formed. The window 30 is formed at a position other than the periphery of the shutter valve 24. The seal 27 is attached to the groove 2 of the shutter valve 24.
At the time of insertion into 6, the opening 29 of the seal 27 can be easily engaged with the projection 28 by pulling the knob 31 from the window 30. Since the outside of the projection 28 is an inclined surface, the operation of pulling the seal 27 into the groove 26 is easy. In addition, because there is window 30,
The state of the projection 28 and the opening 29 after the engagement can also be confirmed. The seal 27 is not vertically symmetrical.
Although the shape is slightly different, the number of projections 28 at both ends of the shutter valve 24 is different, and the number of openings 29 in the seal 27 is correspondingly different. Can be prevented. Further, the position of the square hole 25 as the “rotation axis” of the shutter valve 24 is not the center of the shutter valve 24,
Although the lengths at both ends are different and the vertical direction is determined, also in this case, when the seal 27 is attached to the shutter valve 24 in advance, the projection 28 and the opening exposed from the window 30 are provided. Since the upper and lower sides can be recognized from the number 29, erroneous assembly of the shutter valve 24 to the case 2 can be prevented. The shutter valve 24 to which the seal 27 is attached can be stopped at an arbitrary angle by operating the dial 15 to adjust the air volume, or by turning the dial 15 to the maximum, as shown in FIG. In addition, by bringing the seals 27 at both ends of the shutter valve 24 into contact with the upper and lower inner surfaces of the case 2, the case 2 can be fully closed and the air blowing can be stopped. When the shutter valve 24 is at a position just before being fully closed, the gap between the tip of the seal 27 and the inner surface of the case 2 is narrowed.
For the lower seal 27 abutting against the inner surface of
Due to the pressure of the air passing therethrough, a force acts in a direction of pulling out from the groove portion 26, but in this embodiment, since the projection 28 is engaged with the opening 29 of the seal 27,
The seal 27 is not pulled out. Therefore, even when the shutter valve 24 is controlled to a position just before the fully closing, the seal 27 does not vibrate and no abnormal noise is generated.
The upper protrusion 28 also has a groove 26 on the seal 27 on the upper side.
The upper seal 27 is not subjected to a large force in the pulling-out direction like the lower seal 27. The engagement between the projection 28 and the opening 29 is such that the projection 28 is firmly engaged in the opening 29, and the groove 26 at the lower end of the shutter valve 24 has an inner wall located on the windward side. Since the projection 28 is formed, when the seal 27 comes into contact with the inner surface of the case 2 from the leeward side, the inner portion of the seal 27 is pressed against the projection 28 by the reaction force, and the seal 27 and the projection 28 Is increased, and the seal 27 is more reliably prevented from being pulled out. In addition, since the seal 27 is held by the endless periphery of the shutter valve 24, vibration is more reliably prevented. The vibration is prevented by the seal 27.
Since not only the outer part but also the knob part 31 is housed in the concave part 32, fluttering is prevented. In addition, since the protrusion 28 as a “locking means” for preventing the seal 27 from being pulled out is formed integrally with the groove 26 of the shutter valve 24, the number of components does not increase. In this embodiment, the shutter valve 2
Although the number of projections 28 formed at both end portions of the four is different, the number may be the same as the shutter valve 33 shown in FIG. The projections 2 are provided on both sides of the shutter valve 24.
Although the example in which the seal 8 is formed is shown, the upper protrusion 28 with which the seal 27 contacts from the windward side may be omitted. Further, an opening 29 is formed in the seal 27, and the projection 28 is engaged with the opening 29. However, without forming the opening 29, the projection 2
8 may be directly engaged with the seal 27 so as to bite. According to the present invention, the seal can be prevented from being pulled out by the locking means formed in the groove of the shutter valve. , The seal does not vibrate and no abnormal noise is generated. Further, since the locking means is formed integrally with the shutter valve, the number of parts does not increase.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing a ventilator according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the ventilator of FIG. FIG. 3 is a perspective view of the shutter valve of FIG. 2; FIG. 4 is an exploded perspective view of the shutter valve of FIG. 3; FIG. 5 is a sectional view taken along the line SA-SA shown in FIG. 3; FIG. 6 is a sectional view showing a shutter valve in a fully closed state in the ventilator of FIG. 1; FIG. 7 is a perspective view corresponding to FIG. 3, showing a modified example of the shutter valve. [Description of Signs] 1 Ventilator 2 Case 24 Shutter valve 25 Square hole (rotating shaft) 26 Groove 27 Seal 28 Projection 29 Opening 30 Window 31 Knob 32 Depression

Continuation of front page (58) Field surveyed (Int.Cl. ⁷ , DB name) B60H 1/34

Claims (1)

(57) [Claim 1] A shutter valve for air volume adjustment is rotatably arranged around a rotation shaft inside a cylindrical case capable of blowing air,
Inserting the inner part of a ring-shaped seal into a groove formed on an endless peripheral edge formed in the shutter valve, and making the outer part of the seal protrude to the outside from the groove, A seal at both ends of the shutter valve at the time of rotation of the shutter valve is brought into contact with the opposing inner surface of the case to fully close the case, wherein the shutter valve has an inner wall on one side in a groove portion. , facing said protruding locking means for preventing engages the <br/> sealing of the seal is withdrawn from the groove, is formed integrally with the shutter valve, the the projection of the groove of the shutter valve To the other side
A window is formed on the inner wall to expose the seal, and the inner portion of the seal exposed from the window is
Form a knob that is partially extended from
A concave portion for accommodating the knob portion is formed in a bottom portion of the vehicle ventilator.