JPH0248764Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a rotary cover support device for a ventilation fan for a vehicle or a house.

[Prior Art] A ventilation fan is equipped with a cover to prevent rain and dust from entering from the outside when the ventilation fan is not in use, and this cover is usually openable and closable.

Conventionally, the opening/closing device for this cover has generally been of the outward-opening type using a hinge, but the outward-opening type causes the cover to protrude significantly to the outside when opened, which is not desirable from a safety standpoint, especially when used in a vehicle. In addition, in order to reduce the amount of protrusion of the cover, there is a method in which the cover is divided into upper and lower parts, each of which is pivoted with a separate hinge, and these parts are linked to open and close, but this method results in a complicated structure. The drawback was that it could not be provided at a low price.

On the other hand, if one end of the cover is rotatably supported by a rotating shaft and the cover is rotated within the same plane to open and close, the above-mentioned disadvantages can be solved. Since the cover is simply supported by one rotating shaft at one end, the other end tends to wobble and it is not possible to ensure sufficient sealing performance, leaving various problems in practical use. was.

[Problems to be solved by the invention] This invention was made in view of the above-mentioned drawbacks, and is a rotating cover for a ventilation fan that has a simple structure and can prevent the cover from wobbling and ensure sufficient sealing performance. The purpose is to provide a support device.

[Means for Solving the Problems] The structure of this invention for achieving the above object will be explained based on FIGS. 1 to 5 corresponding to the embodiments. The rotary cover support device of this invention is , a ventilation fan in which a fan 5 and a motor 6 for driving the fan 5 are disposed in a cylindrical frame 2 forming a ventilation passage 21, and a cover 7 is provided on the outside of the cylindrical frame 2.
One end is rotatably supported by a rotating shaft 8, and a plurality of arc-shaped crosspieces 24 centered on the rotating shaft 8 are provided on the cylindrical frame 2 facing the cover 7. The shaped guide rail 25 is attached to the crosspiece 24
Protrude in an arc along the

Further, the cover 7 is provided with an arcuate locking member 71 on its inner surface that locks onto the guide rail 25 and has approximately the same length as the guide rail 25 and is slidable along the guide rail 25.

[Function] When the cover 7 is opened and closed, when the cover 7 is rotated about the rotating shaft 8, the locking member 71 on the inner surface of the cover 7 remains locked to the arc-shaped guide rail 25 centered on the rotating shaft 8. It slides along the guide rail 25. Therefore, when the cover 7 is opened or closed, it is always supported at two places: the rotating shaft 8 and the locking member 71 located relatively far from the rotating shaft 8.
It is possible to prevent the cover 7 from wobbling.

The locking member 71 has an arcuate shape having approximately the same length as the guide rail 25, and is locked to the guide rail 25 over almost the entire length of the guide rail 25 when the cover 7 is closed. The cover 7 is more firmly supported.

[Example] An example in which this invention is applied to a ventilation fan for a vehicle will be described below based on a drawing.A fixed window glass 1 of a vehicle body has an opening 1a for installation, and a ventilation passage is formed in this opening 1a. A circular cylindrical frame 2 forming a numeral 21 is attached. The cylindrical frame body 2 has a flange portion 22 on the outer periphery, and this flange portion 22 is in contact with the outer surface of the window glass 1 via the gasket 3. By fitting the fixing ring 4 that is in contact with the inner surface, the cylindrical frame 2 is firmly fixed to the window glass.
A ventilation fan 5 is provided in the ventilation passage 21 of the cylindrical frame body 2.
A motor 6 for driving the fan 5 is provided.

The cover 7 that opens and closes the ventilation passage 21 of the cylindrical frame 2 has the same circular shape as the cylindrical frame 2, and one end is rotatably supported on the flange portion 22 of the cylindrical frame 2 by a rotating shaft 8. There is. The rotary shaft 8 has an integral structure with the cover 7, and the tip of the rotary shaft 8 penetrates the window glass 1 and the fixing ring 4 and protrudes toward the interior of the room, and the rotary shaft 8 is rotated at the protruding end. A handle 9 is fixedly attached thereto. Further, a spring 10 is wound around the rotating shaft 8 within the fixing ring 4, and the spring 10 always applies an elastic force in a direction protruding toward the indoor side.

A stopper 23 is provided near the pivot point of the cover 7 of the cylindrical frame body 2 to stop the cover 7 in the open and closed positions and to restrict the cover 7 from rotating more than necessary. A plurality of arc-shaped crosspieces 24 centered on the rotation axis 8 of the cover 7 are provided at equal intervals on the body 2 facing the cover 7, and at least one of the crosspieces 24 has a cross section L as shown in FIG. A shaped guide rail 25 is provided protruding in an arc shape along the crosspiece 24.

The cover 7 has the guide rail 25 on its inner surface.
An arcuate locking member 71 that has approximately the same length as the guide rail 25 and is slidable along the guide rail 25, and a cylindrical frame body when the cover 7 is closed and opened Engagement protrusions 72 are provided that engage with the flange portions 22 of 2 to stably hold the cover 7 in those positions. As shown in FIG. 5, the engagement protrusion 72 has a hemispherical shape, and on the other hand, the engagement protrusion 72 fits into the flange portion 22 of the cylindrical frame 2 at a position corresponding to the engagement protrusion 72. Recesses 26, 26 are formed.

The cylindrical frame 2 and the cover 7 are sealed by interposing a sponge rubber packing 11 between them. Most of the gasket 11 is attached to the periphery of the flange portion of the cylindrical frame 2, but a portion of the gasket 11 is separated and attached to the cover 7 side to avoid interference with the locking member 71 on the inner surface of the cover 7. There is. The upper end joint surface of the gasket 11 on the cover 7 side is cut diagonally to increase the joint area, and the lower end of the gasket 11 on the cover 7 side is connected to the gasket 1 on the cylindrical frame 2 side to form a drainage passage 12.
It is installed with a slight gap from 1.

In FIG. 1, the cover 7 is in an open position, and in this position, one edge of the cover 7 is in contact with the stopper 23, and the engaging protrusion 72 is fitted into one of the recesses 26 of the cylindrical frame 2. Furthermore, since the end of the locking member 71 is locked to the guide rail 25 of the cylindrical frame 2, it is stably held in a fixed position without wobbling.

To close the cover 7 from this position, the handle 9 may be operated to rotate the rotary shaft 8 clockwise in the drawing, and the cover 7, which is integrated with the rotary shaft 8, may be rotated about the rotary shaft 8 as a fulcrum. At this time, the engagement protrusion 72 of the cover 7 separates from the recess 26 of the cylindrical frame 2, and the locking member 71 slides along the guide rail 25 while being locked to the guide rail 25. When the engagement protrusion 72 is detached from the recess 26, the pivot portion of the cover 7 resists the elasticity of the spring 10 and floats up as shown by the two-dot chain line in FIG. The hemispherical shape of 72 facilitates this process.

When the cover 7 is in the closed position, as shown in FIG. The cover 7 is held in a fixed position, and the gasket 11 on the cover 7 side is joined to the gasket 11 on the cylindrical frame 2 side to seal the cover 7 and the cylindrical frame 2. In this position, the locking member 71 locks on the guide rail 25 over almost the entire length of the guide rail 25, so the cover 7 is supported over a wide range by the locking member 71 and the rotating shaft 8, and the cover It is possible to more reliably prevent wobbling of the seal 7 and ensure sufficient sealing performance by the gasket 11.

In addition, in this embodiment, a plurality of arc-shaped crosspieces 24
Although the guide rail 25 is shown projecting from only one of the crosspieces 24, it is of course possible to provide the guide rail 25 from each of a plurality of crosspieces 24, and in this case, the locking member 71 on the cover 7 side is also provided. A number corresponding to the number of guide rails 25 must be provided.

[Effects of the invention] As explained above, according to the rotary cover support device of this invention, the cover is always supported at two locations: the rotating shaft and the locking member located relatively far from the rotating shaft when opening and closing. This prevents the cover from wobbling, and since the locking member locks almost the entire length of the arc-shaped guide rail when the cover is in the closed position, it more reliably prevents the cover from wobbling and improves sealing performance. sufficient amount can be secured.

Further, the arc-shaped crosspiece provided on the cylindrical frame and centered around the rotation axis not only has a design effect, but also has the effect of improving the sense of unity with the arc-shaped guide rail protruding from the crosspiece.

Furthermore, the rotary cover support device of this invention has a simple structure and can be provided at low cost.

[Brief explanation of drawings]

The drawing shows one embodiment of this invention.
The figure shows the front view of the ventilation fan with the cover open.
The figure is a front view with the cover closed, Figure 3 is a vertical sectional view along the - line in Figure 2, Figure 4 is an enlarged sectional view of the part in Figure 3, and Figure 5 is the same as in Figure 1. −
FIG. 3 is a partially enlarged sectional view taken along the line. 2... Cylindrical frame body, 24... Crosspiece, 25... Guide rail, 5... Fan, 6... Motor, 7... Cover, 71... Locking member, 8... Rotating shaft.

Claims (1)

[Scope of utility model registration request] In a ventilation fan including a fan and a motor for driving the fan disposed within a cylindrical frame forming a ventilation passage, one end of a cover is rotatably supported on the outside of the cylindrical frame by a rotating shaft, and A plurality of arc-shaped crosspieces centered on the rotation axis are provided on the cylindrical frame facing the cover, and a guide rail having an L-shaped cross section is provided on the crosspieces in an arc-shaped manner protruding along the crosspieces, and on the cover. A rotary cover support for a ventilation fan, characterized in that an arc-shaped locking member having approximately the same length as the guide rail is provided on the inner surface of the support and is slidable along the guide rail. Device.