JP3266482B2 - Ventilation shutter device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter device for a ventilation port, which is constructed by rotatably mounting a shutter plate that opens and receives a wind pressure on the ventilation port.

[0002]

2. Description of the Related Art For example, in the case of a ceiling fan, FIG.
As shown in FIG.
A connection cylinder (air vent) 3 communicating with the discharge port 2a of the fan 3 is provided.
The room air sucked by the above is discharged outside the room via the connection cylinder 3 and the exhaust duct 4.

[0003] A plastic shutter plate 6 which is opened in response to wind pressure from the fan 5 is rotatably provided in the connection cylinder 3, and the shutter cylinder 6 closes the connection cylinder 3 when ventilation operation is stopped. External air flowing backward through the exhaust duct 4 is prevented from entering the room.

A conventional structure for rotatably mounting the shutter plate 6 to the connection cylinder 3 is shown in FIG.
Circular shaft support holes 7 are formed in the left and right side walls of the connection cylinder 3, and projecting shafts 6 are formed in the left and right sides of the shutter plate 6.
a and 6a are integrally protruded, and the shaft portions 6a and 6a are inserted into the shaft supporting holes 7 and 7 to be rotatably supported.

In this case, the circular shaft support hole 7 is
Since a is a thin protruding piece, when the shaft portion 6a is inserted into the shaft support hole 7, a gap is formed between them. Therefore, hood portions 3a, 3a that cover the shaft support holes 7, 7 on both left and right sides of the connection cylinder 3
Are integrally formed so as to prevent the air to be discharged outside from leaking from the gap between the shaft support hole 7 and the shaft portion 6a to the space above the ceiling.

[0006]

However, in the above-mentioned conventional structure, when the shaft portions 6a of the shutter plate 6 are inserted into the shaft support holes 7, 7, the shutter plate 6 is shown by a two-dot chain line in FIG. As shown in the figure, the shutter plate 6 is inserted into the connection cylinder 3 while being elastically deformed in an arc shape, and the shutter plate 6 is restored by its own elastic force with the shaft portions 6a, 6a positioned at the shaft support holes 7, 7. Since the shaft portions 6a, 6a must be inserted into the shaft support holes 7, 7 while doing so, much labor is required for mounting the shutter plate 6, and the workability is poor. If the shutter plate 6 is bent too much when it is bent in an arc, the shutter plate 6 may be deformed.

Further, in order to cover the shaft support hole 7 and prevent the exhaust air from leaking to the space above the ceiling, it is necessary to integrally form the hood portion 3a with the connection cylinder 3,
However, there is a problem that the manufacturing cost increases.

The present invention has been made in view of the above circumstances, and an object of the present invention is to attach a shutter plate to a ventilation port.
A shutter device with a ventilation port that can be easily performed without bending the shutter plate and that does not need to form a shaft support hole for supporting the shutter plate in the ventilation port that causes air leakage to the outside. To offer.

[0009]

In order to achieve the above object, the present invention relates to a shutter device for a ventilation port, wherein a shutter plate that opens and receives an air pressure on the ventilation port is rotatably mounted. A pair of shafts protruding from the inner surface of the ventilation opening, and a pair of shafts protrudingly provided on the shutter plate so as to form a recess between the shutter plate and the fitting opening that opens in a radial direction of the shafts. A pair of substantially L-shaped bearing portions for fitting the shaft portion into the recesses from the fitting inlets, and at least one of the shutter plate and the bearing portions so as to be elastically deformable; A stopper is provided to allow the shaft portion to be fitted and to be restored to engage with the shaft portion fitted in the concave portion to prevent the bearing portion from coming off from the shaft portion.

According to this structure, when the shaft portion is fitted into the recess of the bearing portion while the shutter plate is inserted into the ventilation port, the stopper is elastically deformed, and the shaft is elastically deformed by the elastic deformation of the stopper. The part is fitted in the recess. When the shaft is fitted into the recess, the stopper is restored by its own elasticity, and the bearing is prevented from coming off from the shaft.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to an embodiment in which the present invention is applied to a ceiling fan. FIGS. 1 to 7 show a first embodiment of the present invention. First, in FIGS. 6 and 7 showing the entire configuration of a ceiling ventilation fan, FIG.
1, a rectangular opening 12 is formed. Around the opening 12, a field edge 1
3 is attached.

On one side of the opening 12, a plastic support plate 15 integrally formed with a connecting cylindrical body 14 serving as a ventilation port body having an internal ventilation port is disposed. The piece 15 a is addressed to the lower surface of the ceiling plate 11, and is fixed to the ridge 13 via the ceiling plate 11 with screws (not shown). In the opening 12, a main body box 16 is provided.
The flange 16a at the lower end is addressed to the lower surface of the ceiling plate 11, and
And is fixed by screws (not shown). In this case, one side of the flange portion 16a of the main body box 16 is
Is fixed so as to overlap the lower side of the mounting piece 15a.

Here, a fitting hole 15b is formed at the upper end of the support plate 15, and a projection 15c is formed to project from the lower surface of the mounting side 15a. On the other hand, a projection 16b that fits into the fitting hole 15b of the support plate 15 is formed on the upper surface of the main body box 16, and the flange 16
On one side of a, a fitting hole 16c is formed to fit with the projection 15c of the support plate 15.

When the main body box 16 is inserted into the opening 12, the protrusion 16b of the main body box 16 and the fitting hole 16c are formed.
Are fitted into the fitting holes 15b and the projections 15c of the support plate 15, so that one side surface of the main body box 16 is positioned so as to be in close contact with the support plate 15, and under this positioning state The main body box 16 can be fixed by screws (not shown).

In the main body box 16 attached to the opening 12 of the ceiling plate 11 as described above, a fan casing 17 made of a heat insulating material, for example, a foamed plastic is accommodated.
A suction port 17a is formed on the lower surface of the fan casing 17, and a discharge port 17b is formed on one side. In the fan casing 17, a centrifugal fan 19 rotated by a motor 18 fixed to the upper inside of the main body box 16 is arranged.

The main body box 16 includes a fan casing 1.
7 is fixed, and a decorative panel 21 that covers the lower surface portion of the main body box 16 from below is detachably attached to the attachment 20 via a torsion coil spring 22. In this case, a plurality of spacer legs 21a abutting on the flange portion 16a of the main body box 16 are integrally formed on the upper surface of the decorative panel 21, and the decorative panel 21 and the ceiling panel are formed by these legs 21a. 11 so that a ventilation gap 23 is formed. Therefore, the suction port 17a of the fan casing 17 is
It is in a state of being communicated with the room through 3.

On the other hand, the discharge port 17 of the fan casing 17
b is a position corresponding to one of the side surfaces of the main body box 16 which is in close contact with the support plate 15.
6, through an opening 16d formed on one side of the connecting plate 6, the connecting plate 14 is in communication with the connecting cylinder 14 of the support plate 15. The connecting cylinder 14 has an exhaust duct 24 communicating with the outside of the room.
Therefore, the discharge port 17 b of the fan casing 17 is in communication with the exhaust duct 24 via the connection cylinder 14.

A shutter plate 25 made of plastic is rotatably mounted in the connecting cylinder 14. The shutter plate 25 is opened by the air pressure of the air blown from the fan 19 during the ventilation operation, and closes the connection cylinder 14 by its own weight when the ventilation operation is stopped to close the exhaust duct 2.
4 prevents the outside air flowing backward through the fan 4 from entering the room through the fan casing 17. In this case, the lower end of the shutter plate 25 is provided at the lower portion of the inner surface of the connection cylinder 14 so that the shutter plate 25 maintains the closed state even when receiving the wind pressure of the external wind flowing backward in the exhaust duct 24. Are abutted integrally with each other.

Here, the mounting structure of the shutter plate 25 will be described in detail. First, as shown in FIG. 3, the left and right sides of the inner surface of the connecting cylinder 14 are slightly upward from the center of the connecting cylinder 14. At a deviated position, a pair of shaft portions 27 are integrally provided so as to be substantially horizontal.

On the other hand, the left and right sides of one of the front and rear plate surfaces (hereinafter referred to as the front surface) of the shutter plate 25 are slightly upward from the center as shown in FIGS. A pair of bearing portions 28 are provided so as to be protruded integrally.
The bearing portion 28 includes an upright piece 28a that rises substantially at a right angle from the surface of the shutter plate 25, and an opposing piece 28b that extends downward from the tip of the upright piece 28a so as to face the surface of the shutter plate 25. The upright piece 28a and the opposing piece 28b form a recess 29 between the shutter plate 25 and the upright piece 28a.

In the recess 29 of the bearing 28, the shaft 27
The concave portion 29 is opened in the radial direction of the shaft portion 27, specifically, downward so as to fit the shaft portion 27, and the open end thereof (the lower end of the opposing piece portion 28b and the lower end thereof). A space between the shutter plate 25 and the shutter plate 25 is a fitting entrance 30.

The concave portion 29 of the bearing portion 28 is also open on both the left and right sides. Of the open ports on the left and right sides, the inner open port, that is, the right bearing portion 28 has a left open port and a left open port. The bearing 28 has an opening on the right side as a locking portion that abuts against the tip of the shaft 27 fitted into the recess 29 to restrict the shake of the shutter plate 25 in the shaft direction (left-right direction). The stop surface portion 31 is formed integrally.

The bearing portion 28 is prevented from coming off from the shaft portion 27 fitted in the concave portion 29 by a stopper 32 formed on the shutter plate 25. This stopper 32
Is configured as follows in the present embodiment. That is, a pair of bearings 28 are provided on both left and right sides of the shutter plate 25.
Is formed outside the bearing portion 28 in the vicinity of the bearing portion 28. The through groove 33 is provided in the shutter plate 2.
The tongue 34 is formed on the shutter plate 25 by the formation of the through-groove 33.

The lower end of the tongue piece 34 is the shutter plate 2 only.
The shutter plate 25 is elastically deformable in the front and back directions of the shutter plate 25. On the surface of the tip of the tongue piece 34, a projection 35 is provided so as to protrude.
5 constitute a stopper 32. The protrusion 35
Is formed on a slope 35a which functions as a guide for the shaft portion 28 when the shaft portion 27 is relatively fitted into the concave portion 29 as described later.

Here, the height of the opening of the fitting entrance 30 of the recess 29, that is, the distance between the surface of the shutter plate 25 and the opposing piece 28b of the bearing 28 is set substantially equal to the outer diameter of the shaft 27. On the other hand, the protrusion 35 of the stopper 32 has a protrusion height set to be slightly smaller than the outer diameter of the shaft portion 27, so that the shaft portion 27 fitted in the concave portion 29 is formed.
To prevent the bearing portion 28 from coming off from the shaft portion 27.

A procedure for rotatably mounting the shutter plate 25 configured as described above in the connecting cylinder 14 will be described. The mounting of the shutter plate 25 is performed before the support plate 15 is inserted into the opening 12.
5 is attached to the opening 12, and then the main body box 16 is attached to the opening 1.
2 may be performed before insertion.

To mount the shutter plate 25, the shutter plate 25 is inserted into the connecting cylinder 14, as shown in FIG. In this case, the shutter plate 25 is inserted into the connecting cylinder 14 from the opening on the body box 16 side as shown by an arrow A with the lower end first, with the surface on which the bearing portion 28 protrudes is directed upward. It is to be inserted. Then, the shutter plate 25
Of the pair of bearings 28, the surfaces of the shafts 27 are inserted into the shafts 27 while sliding.
Naturally enters 0.

When the shaft portion 27 enters into the fitting inlet 30, the shaft portion 27 relatively rides on the slope 35a of the projection 35 of the stopper 32, and the shaft portion 27 enters the slope 35a. The tongue piece 34 is elastically deformed downward as shown by the broken line in FIG. 4 as the rider rides, allowing the shaft portion 27 to fit into the recess 29. Then, the shaft portion 27 is
When the shaft 27 is completely fitted in the shaft 9, the shaft portion 27 comes off the projection 35 of the stopper 32, and the tongue 34 of the stopper 32 returns to its original state by its own elastic restoring force. As a result, the projection 35 locks the shaft 27, so that the shaft 27 does not relatively come out of the recess 29.

As described above, the shutter plate 25 is connected to the connection cylinder 14.
After that, when the user releases his / her hand from the shutter plate 25, the shutter plate 25 rotates by its own weight in the closing direction indicated by the arrow B as shown in FIG. And the lower end abuts against the stop piece 26 and is stopped so as not to rotate further in the direction of arrow B.

Next, the operation of the embodiment constructed as described above will be described. When the ventilation operation is started, the fan 19 is rotated by the motor 18. Due to the rotation of the fan 18, room air is sucked into the fan casing 17 from the suction port 17 a through the ventilation gap 23, and is blown into the connection cylinder 14 from the discharge port 17 b.

Then, the shutter plate 25 receives the wind pressure of the air blown into the connecting cylinder 14 and rotates (opens) about the shaft 27 in the direction opposite to the arrow B (opening operation).
Release 4. As a result, the room air sucked by the fan 19 is blown into the exhaust duct 24 via the connection cylinder 14, and is discharged outside the room via the exhaust duct 24.

When the ventilation operation is stopped, the fan 18 stops, so that the shutter plate 25 rotates (closes) in the direction of arrow B about the shaft 27 by its own weight, and the lower end of the shutter plate 25 is moved to the stop piece 26. Stopped at the abutted position. In this state, even if the outside air flows backward through the exhaust duct 24 and the wind pressure acts on the shutter plate 25, the shutter 25 is stopped at the closed position in contact with the stop piece 26. Without blocking the outside wind. Thereby, the exhaust duct 2
4 prevents the outside air flowing backward through the fan 4 from entering the room through the fan casing 17.

The shutter plate 25 which opens and closes in accordance with the start and stop of such a ventilating operation. The shutter plate 25 may swing right and left during the opening and closing operation. Of the shaft portion 2
7 is suppressed to a slight amount of shake movement, and the left and right outer peripheral portions of the shutter plate 25 are connected to the connection cylinder 14.
To prevent contact with the inner peripheral surface of the

As described above, according to the present embodiment, the bearing portion 28 is fitted to the shaft portion 27 in a retaining state only by the operation of inserting the shutter plate 25 into the connection cylinder 14, and the shaft portion 27 As a result, the shutter plate 25 is rotatably supported, so that the shutter plate 25 can be easily mounted, and the mounting workability is improved. Moreover, since the shutter plate 25 does not need to be bent, the shutter plate 25 is not deformed due to excessive bending.

Further, since a shaft 27 is protruded from the inner surface of the connecting cylinder 14 and the shutter plate 25 is rotatably supported by the shaft 27, the conventional structure shown in FIGS. Unlike the configuration in which the shaft support hole 7 is formed in the connection cylinder 3, the air to be discharged outside the shutter plate 2
5 does not leak out of the connecting cylinder 14 from the supporting portion. Therefore, the hood portion 3a which has conventionally been required to be formed on the connection cylinder 3 is no longer necessary, and the connection cylinder 14 is accordingly reduced.
Can be reduced in manufacturing cost.

Further, the amount of lateral movement of the shutter plate 25 is suppressed to a very small amount by bringing the locking surface portion 31 into contact with the tip of the shaft portion 27.
The shutter plate 25 can be smoothly opened and closed, and can be prevented from being left in a half-open state due to frictional resistance received from the inner peripheral surface of the connecting cylinder 14. .

FIGS. 8 and 9 show a second embodiment of the present invention. The difference from the first embodiment is the structure of the stopper. That is, the shutter plate 25 is formed with a through-groove 36 which is located near the bearing portion 28 and outside the bearing portion 28 and extends straight in the upward direction.
By the formation of 6, an elastically deformable bridging piece 37 having upper and lower ends connected to the shutter plate 25 is formed.

Although both ends of the bridging piece 37 are connected to the shutter plate 25, the shutter plate 2
Since the shutter plate 25 is separated from the shutter plate 25, the shutter plate 25 is elastically deformable in the front and back directions. A stopper 38 is formed by the bridging piece 37 and the projection 35.

With this configuration, the same effect as in the first embodiment can be obtained. Also, like the tongue piece 34 separated from the shutter plate 25 by the through groove 33 of the first embodiment, the bridging piece 37 is also separated from the shutter plate 25 by the through groove 36, so that it is rich in elastic deformation. Shaft 27
When it is fitted into the concave portion 29, it is easily elastically deformed, so that the workability of mounting the shutter plate 25 is further improved. In particular, the bridging piece 37 of the present embodiment has both upper and lower ends connected to the shutter plate 25. Since it has a so-called support structure at both ends, the strength is increased and the breakage preventing effect is excellent.

FIG. 10 shows a third embodiment of the present invention. The difference from the first embodiment is that a stopper is formed on the bearing portion 28 side. The stopper 39 of the present embodiment is made elastically deformable by forming a substantially L-shaped through-groove 40 similar to the through-groove 33 of the first embodiment at a portion of the bearing 28 closer to the outside of the facing piece 28b. Tongue piece 41 and this tongue piece 41
And a projection 42 similar to the projection 35 of the first embodiment, which is integrally provided on the inner surface of the projection so as to project into the recess 29. The lower surface of the projection 42 is also inclined 35a of the projection 35.
It is formed on a similar slope 41.

As described above, even when the stopper 39 is provided on the bearing portion 28 side, when the shaft portion 27 is fitted, the tongue piece 41 is elastically deformed in the arrow C direction, so that the shaft portion 27 can be fitted into the concave portion 29. When the shaft portion 27 is completely fitted into the concave portion 29, the tongue piece 41 is restored by its own elastic restoring force, and the projection 42 engages with the shaft portion 27, so that the same effect as in the first embodiment is obtained. Can be obtained.

Further, since the through groove 40 is formed in the bearing portion 28, unlike the first embodiment in which the through groove 33 is provided in the shutter plate 25, a small amount of external air flows through the through groove 33 but the fan The inconvenience of intruding into the casing 17 can be effectively prevented.

FIGS. 11 and 12 show a fourth embodiment of the present invention. This embodiment differs from the first embodiment in that the inner surface of the opposing piece 28b and the shutter plate constituting the inner surface of the recess 29 are formed. 25, a ridge 43 having a substantially V-shaped cross section
The protrusion 44 is provided so as to extend in the vertical direction perpendicular to the axis of the shaft 27, and the protrusions 43 and 44 are in sliding contact with the outer peripheral surface of the shaft 27.

In such a configuration, the shaft portion 27 is received in a point contact state by the ridges 43 and 44, so that the frictional resistance between the shutter plate 25 and the shaft portion 27 is reduced, and the shutter plate 25 becomes more rigid. The opening / closing operation can be performed smoothly, and the rattling noise generated when the bearing portion 28 intermittently contacts the shaft portion 27 can be reduced when the shutter plate 25 swings in the opening / closing operation direction. In addition, the ridge 43 is the bearing 2
8 may be provided on the inner surface of the rising piece 28a.

FIGS. 13 and 14 show a fifth embodiment of the present invention, which is the ridges 43 and 44 of the fourth embodiment.
A ridge 45 having a substantially V-shaped cross section and having the same function as
7 is provided on the outer peripheral surface thereof so as to integrally protrude therearound. Even with such a configuration, the same effect as in the fourth embodiment can be obtained.

FIGS. 15 and 16 show a sixth embodiment of the present invention, which is characterized in that a shaft 46 is covered with a tube 46 made of a soft plastic. In such a configuration, since the shaft portion 27 contacts the inner surface of the bearing portion 28 via the soft tube 46, the shock when the bearing portion 28 comes into contact with the shaft portion 27 due to the fluttering of the shutter plate 25 is reduced. As a result, the noise is absorbed by the sound 46, and the occurrence of fluttering noise can be prevented.

FIGS. 17 and 18 show a seventh embodiment of the present invention, in which a stopper 47 similar to the stopper 32 of the first embodiment is provided on the shutter plate 25 and the third embodiment.
A stopper 48 similar to the stopper 39 of the embodiment is mounted on the bearing 2.
8 is provided on the opposing piece 28b.

When the stoppers 47 and 48 are provided on both the shutter plate 25 and the opposing piece 28b, the two projections 49 and 50 are engaged with the shaft 27, so that the projections 49 are provided. , 50 can be lower than the heights of the projections 35, 42 of the first and third embodiments. Therefore, the amount of elastic deformation of the tongue pieces 51 and 52 when the shaft 27 is fitted into the recess 29 can be reduced, and the occurrence of breakage of the tongue pieces 51 and 52 can be effectively prevented.

FIG. 19 shows an eighth embodiment of the present invention, in which a stopper 53 is provided on the surface of a shutter plate 25 and is a relatively thin protruding piece which is elastically deformable in the vertical direction. It is configured by Even with this configuration, when fitting the shaft portion 27 into the concave portion 29, the stopper 53
Is elastically deformed upward as shown by arrow D to allow the shaft portion 27 to be fitted into the concave portion 29, and when the shaft portion 27 is completely fitted into the concave portion 29, the stopper 53 is restored to the shaft portion 27. Engage.

With this configuration, the same effects as in the first embodiment can be obtained. In addition, the grooves 33 and 36 shown in the first and second embodiments are formed to form the stopper 53. Since it is not necessary to provide, the problem that the outside air enters the fan casing 17 through a small amount through the grooves 33 and 36 can be effectively prevented.

In the case where the tongue piece 34 and the bridging piece 37 are elastically deformable by forming the through-grooves 33 and 36 as shown in the first and second embodiments, the shutter plate Of the 25 molds, the mold portion for forming the through-grooves 33 and 36 is undercut, so that the mold portion needs to be a slide mold, which complicates the mold configuration. Since there is no need to form a groove, a simple two-part mold without a slide mold is sufficient, and the configuration of the mold for the shutter plate 25 is simplified.

The stopper 53 as shown in the eighth embodiment
Is a stopper 54 composed of a tapered protruding piece (projection) having a chamfered tip as in the ninth embodiment of the present invention shown in FIG.
Or a stopper 55 consisting of a tapered protruding piece (projection) having a sharp tip as in the tenth embodiment of the present invention shown in FIG. 21, or a second embodiment of the present invention shown in FIG. 1
As in the first embodiment, the stopper 56 may be changed to a stopper 56 having a tapered pin (projection).

The present invention is not limited to the embodiment described above and shown in the drawings. For example, the present invention is not limited to the shutter device of the ventilation fan for the ceiling, but is constituted by rotatably mounting a shutter plate in the ventilation opening. The shutter device can be widely applied to general shutter devices.

[0054]

As described above, according to the present invention, the following effects can be obtained. According to the first aspect of the present invention, only by inserting the shutter plate into the ventilation port,
Since the shutter plate can be supported by the shaft portion of the ventilation port, the work of mounting the shutter plate can be performed easily, and further, it is not necessary to form a shaft support hole for supporting the shutter plate on the peripheral wall of the ventilation port. Therefore, it is not necessary to provide a hood portion for covering the shaft supporting hole outside the ventilation hole, and the manufacturing cost can be reduced.

According to the second aspect of the present invention, since it is not necessary to provide the shutter plate with a through-groove, the wind shielding effect of the shutter plate when closed is enhanced. According to the third aspect of the present invention, since the stopper is separated from the shutter plate by the through-groove, the elastic deformation of the stopper is further increased, and the work of mounting the shutter plate is further facilitated. According to the fourth aspect of the present invention, since the stopper is formed in the bearing portion, it is not necessary to form a through-groove in the shutter plate, so that air does not leak from the through-groove.

According to the fifth aspect of the present invention, since the swing movement of the shutter plate in the axial direction is restricted, the sliding contact of the shutter plate with the inner peripheral surface of the ventilation hole can be prevented. In the invention of claim 6, since the contact between the shaft portion and the bearing portion is in a point contact state, the frictional resistance between the two can be reduced. According to the invention of claim 7, the amount of elastic deformation of the stopper can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view of a shutter plate according to a first embodiment of the present invention.

FIG. 2 is a front view showing one half of a shutter plate;

FIG. 3 is a perspective view of a support plate.

FIG. 4 is a longitudinal sectional side view of a connection cylinder showing a process of attaching a shutter plate.

FIG. 5 is a view corresponding to FIG. 4 after a shutter plate is attached.

FIG. 6 is a vertical side view of a ceiling fan.

FIG. 7 is a cross-sectional view of a ceiling ventilation fan.

FIG. 8 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 9 is a diagram corresponding to FIG. 2;

FIG. 10 is a partial perspective view of a shutter plate showing a third embodiment of the present invention.

FIG. 11 is a view corresponding to FIG. 10 showing a fourth embodiment of the present invention.

FIG. 12 is a cross-sectional view showing a state in which a bearing is supported by a shaft.

FIG. 13 is a partial perspective view of a shaft portion and a shutter plate showing a fifth embodiment of the present invention.

FIG. 14 is a diagram corresponding to FIG. 12;

FIG. 15 is a view corresponding to FIG. 13 showing a sixth embodiment of the present invention.

FIG. 16 is a diagram corresponding to FIG. 12;

FIG. 17 is a view corresponding to FIG. 10 showing a seventh embodiment of the present invention.

FIG. 18 is a diagram corresponding to FIG. 12;

FIG. 19 is a view corresponding to FIG. 10, showing an eighth embodiment of the present invention;

FIG. 20 is a perspective view of a stopper according to a ninth embodiment of the present invention.

FIG. 21 is a view corresponding to FIG. 20, showing a tenth embodiment of the present invention;

FIG. 22 is a view corresponding to FIG. 20, showing an eleventh embodiment of the present invention;

FIG. 23 is a diagram corresponding to FIG. 7 showing a conventional example.

FIG. 24 is an exploded perspective view of a connection cylinder and a shutter plate.

[Explanation of symbols]

In the figure, 14 is a connection cylinder (vent), 16 is a main body box, 24
Is an exhaust duct, 25 is a shutter plate, 26 is a locking piece, 27
Is a shaft portion, 28 is a bearing portion, 29 is a concave portion, 30 is a fitting inlet, 3
1 is a locking surface (locking portion), 32 is a stopper, 33 is a groove, 34 is a tongue, 35 is a protrusion, 36 is a groove, 37 is a bridging piece, 38 and 39 are stoppers, and 40 is a groove. , 43 to 45 are ridges, 46 is a tube, 47 and 48 are stoppers, 49,
50 is a projection, 51 and 52 are tongue pieces, and 53 to 56 are stoppers.

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁷ , DB name) F24F 7/10 101 F24F 13/14

Claims (7)

(57) [Claims] 1. A shutter plate rotatably attached to a ventilation opening that receives an air pressure to open the shutter, wherein: a pair of shafts protruding from an inner surface of the ventilation opening; A pair of substantially L-shaped bearings projecting from the shutter plate so as to form a concave portion having a fitting opening for radially opening the shaft portion, and fitting the shaft portion into the concave portion from the fitting opening. And at least one of the shutter plate and the bearing portion is elastically deformable, and is elastically deformed to allow the shaft portion to fit into the concave portion, and is restored to fit into the concave portion. And a stopper for engaging the shaft portion to prevent the bearing portion from coming off from the shaft portion. 2. The ventilation device according to claim 1, wherein the stopper comprises an elastically deformable projection projecting from the shutter plate. 3. The stopper according to claim 1, wherein the stopper is formed by projecting a projection that engages with the shaft portion at a portion that is made elastically deformable by forming a through-groove in the shutter plate. A shutter device for an air vent according to the above. 4. The stopper according to claim 1, wherein the stopper is formed by projecting a projection that engages with the shaft at a portion that is elastically deformable by forming a through groove in the bearing. A shutter device for an air vent according to the above. 5. The ventilation port according to claim 1, wherein the bearing portion is provided with a locking portion that restricts the movement of the shutter plate in the axial direction by contacting the tip of the shaft portion. Shutter device. 6. The shutter device according to claim 1, wherein a ridge portion is provided on an inner surface of the concave portion or an outer peripheral surface of the shaft portion so as to be in contact with a mating side. 7. The ventilation device according to claim 1, wherein the stopper is provided on both the bearing portion and the shutter plate.