JPH0354350Y2 - - Google Patents

Description

[Detailed description of the invention] [Purpose of the invention] (Field of industrial application) The present invention relates to an air blowing device used for air conditioning or ventilation in automobiles, etc.

(Prior art) For example, in an air blowing device for an automobile cooling system, the wind speed of the blown air is changed by changing the cross-sectional area of the blown air passage, as shown in Japanese Utility Model Publication No. 50-3005. By moving the inner cylinder inside the outer cylinder, the end of the inner cylinder whose diameter has been expanded into a bell mouth shape approaches and separates from the end of the outer cylinder, opening and closing the ventilation passage between the inner cylinder and the outer cylinder. There is something.

(Problems to be solved by the invention) By the way, in the case of the air blowing device disclosed in the above publication,
If the connecting duct has the same diameter as the outer cylinder, air will not always pass through the ventilation path between the inner cylinder and the outer cylinder, so it needs to be larger in diameter than the outer cylinder. It was necessary to use a particularly large duct or to form a large-diameter passage between the outer cylinder and the duct, and a large amount of space was required.

The present invention was developed in view of these points, and it is possible to use a duct of a general size as it is in an air blowing device that changes the wind speed of the blown air by changing the cross-sectional area of the blown air passage. This is the purpose.

[Structure of the idea]

(Means for Solving the Problems) The air blowing device of the present invention has an outer cylinder 1 having a protrusion 4 on the inside, a groove 5 on the outside, and a relationship between the groove 5 and the protrusion 4. An inner cylinder 2 attached to the inner side of the outer cylinder 1 and a ventilation passage 1 inside the inner cylinder 2 depending on the case.
The shutter 9 has a ventilation opening 13 corresponding to the diameter of the inner cylinder 2 and moves back and forth toward the outside of the tip of the inner cylinder 2 to open and close the ventilation passage 14 between the inner cylinder 2 and the outer cylinder 1.

(Function) The air blowing device of the present invention opens the air passage 12 inside the inner cylinder 2 and the inner cylinder 2 by opening the shutter 9.
By blowing out air using both the ventilation passages 14 between the inner cylinder 1 and the outer cylinder 1, and closing the shutter 9, the inner cylinder 2
Air is blown out using only the ventilation passage 12 inside.

(Embodiment) An embodiment of the air outlet of the present invention will be described with reference to the drawings.

In Figures 1 and 2, 1 is an outer cylinder made of synthetic resin, 2 is an inner cylinder made of synthetic resin, and outer cylinder 1 is integrally formed at the tip of duct 3 as a part of duct 3. The tube 2 is disposed coaxially at the center inside the outer tube 1 portion at the tip of the duct 3.

As shown in FIG. 3, the outer cylinder 1 and the inner cylinder 2 both have a substantially rectangular cross section and are formed in substantially similar shapes, and the outer cylinder 1 has protrusions 4 along the axial direction on the upper and lower parts of the inner side. In addition, grooves 5 are formed along the axial direction on the upper and lower parts of the outer side of the inner cylinder 2 in correspondence with the protrusions 4, and the engagement between the protrusions 4 and the grooves 5 causes the inner tube to open. The tubes 2 are mounted at a predetermined position inside the outer tube 1, that is, coaxially located and with their tips located on the same plane. Note that for positioning the tips of the outer cylinder 1 and the inner cylinder 2 on the same surface, a protrusion 4 is used.
In addition to the engagement of the groove 5 with the groove 5, other fixing means may be used.

The distal end of the outer cylinder 1 is connected to a ventilator 6, as also shown in FIG. This ventilator 6 has a louver 8 made of synthetic resin at the front opening of a square tubular synthetic resin case 7 that fits over the outer cylinder 1, and a louver 8 made of synthetic resin is provided on the inside of the rear part of the case 7, as shown in FIG. A shutter 9 is provided.

The shutter 9 is a shutter plate 1 made of synthetic resin.
A sheet 11 made of a soft synthetic resin such as urethane foam is attached to the rear surface of the 0, and a rectangular ventilation hole 1 corresponding to the inner ventilation passage 12 inside the inner cylinder 2 is provided in the center of the sheet 11.
3, and an outer ventilation passage 1 between the inner cylinder 2 and the outer cylinder 1.
4 is designed to open and close, and the shutter plate 10
The shutter plate 10 is rotatably supported at both lower portions of the case 7 via a shaft 15 integral with the shutter plate 10, and a lever 16 is integrally provided on the shutter plate 10, and this lever 16 is connected via a link 17. Dial 18
The dial 18 is pivotally connected to the case 7, and the dial 18 is rotatably disposed on the front surface of the case 7.

Then, as shown in FIG.
When the shutter 9 is rotated counterclockwise about the shaft 15 via the link 17 and the lever 16, the shutter 9 is shaped along the inner bottom of the case 7 and the inner ventilation passage 12 is rotated. Then, as shown in FIG. 2, by rotating the dial 18, the shutter 9 is moved clockwise around the shaft 15 via the link 17 and the lever 16. When rotated, the shutter 9 crosses the case 7, and the seat 11 of the shutter 9 elastically contacts the tip of the outer tube 1 and the tip of the inner tube 2, and the outer ventilation passage 14 is in a closed state. Therefore, only the inner ventilation passage 12 is opened by the ventilation opening 13 of the shutter 9.

Therefore, in the state shown in FIG. 1, the air sent from the duct 3 passes through the relatively wide cross-sectional area of both ventilation passages 12 and 14 and reaches the ventilator 6.
Since the air is blown from the whole area, the blowing speed is relatively slow, and therefore the wind spreads over a wide area near the ventilator 6, and in the state shown in FIG.
The air sent from the duct 3 passes through the relatively narrow cross-sectional area of only the inner ventilation passage 12 to the ventilator 6.
Since the air is blown out intensively from the center of the ventilator 6, the blowing speed is relatively high, and therefore the air reaches a spot far from the ventilator 6 in a narrow range.

FIG. 6 shows a method of manufacturing the outer cylinder 1, in which the outer cylinder 1 is formed by blow molding, and protrusions 23 are provided in the cavities of the molds 21 and 22 used at that time. The parison 24 into which air is blown comes into close contact with the protruding stripes 23, and as shown in FIG. When viewed from the outside, the grooves appear as grooves, so if the inner tube 2 is blow-molded using a similar mold, the grooves 5 can be formed on the outside of the molded product, that is, the inner tube 2. Both the protrusion 4 and the groove 5 of the inner cylinder 2 have a substantially U-shaped cross section,
Since it has elasticity, the outer cylinder 1 and the inner cylinder 2 can be easily combined from the axial direction as shown in FIG. 8, and there is no play in the combined state.

As can be understood from the fact that the outer cylinder 1 is integrally formed at the tip of the duct 3 as a part of the duct 3, there are few restrictions on the diameter of the duct 3 relative to the outer cylinder 1, and the outer cylinder 1 is On the other hand, the duct 3 may have the same diameter, and a specially large duct 3 may be used, or the outer cylinder 1 may have the same diameter.
There is no need to form a large-diameter passage between the duct 3 and the duct 3, and the space does not take up much space.

[Effect of idea]

As described above, according to the present invention, by opening the shutter, air is blown out using both the ventilation passage inside the inner cylinder and the ventilation passage between the inner cylinder and the outer cylinder, and by closing the shutter, Since the air is blown out using only the ventilation passage inside the inner cylinder, the wind speed can be changed by opening and closing the shutter, and there is no need to increase the diameter of the duct relative to the outer cylinder, so it is not suitable for general use. Since it is not necessary to use a particularly large duct or to form a passage with a large diameter between the outer cylinder and the duct, it does not take up much space.

[Brief explanation of drawings]

The figures show an embodiment of the air blowing device of the present invention, in which Fig. 1 is a side view in longitudinal section, Fig. 2 is in a different operating state from Fig. 1, Fig. 3 is a front view in longitudinal sectional view, and Fig. 4 is a longitudinal sectional view in front.
The figure is an external perspective view, Figure 5 is an internal perspective view, Figure 6 is a perspective view of the mold for forming the outer cylinder, Figure 7 is a perspective view of the outer cylinder, and Figure 8 is the assembled state of the outer cylinder and inner cylinder. FIG. 1... Outer cylinder, 2... Inner cylinder, 4... Protrusion, 5...
Concave groove, 9... Shutter, 12... Ventilation path, 13...
...Ventilation port, 14...Ventilation passage.

Claims (1)

[Scope of utility model registration request] An outer cylinder having a convex line on the inside, an inner cylinder having a groove on the outside and attached to the inside of the outer cylinder by engagement of the groove with the convex line, and a ventilation passage inside the inner cylinder. What is claimed is: 1. An air blowing device comprising: a shutter having a ventilation opening corresponding to the above, and a shutter that moves forward and backward toward the outside of the tip of the inner cylinder to open and close a ventilation path between the inner cylinder and the outer cylinder.