JPS6372426U

JPS6372426U -

Info

Publication number: JPS6372426U
Application number: JP16835286U
Authority: JP
Priority date: 1986-10-31
Filing date: 1986-10-31
Publication date: 1988-05-14
Anticipated expiration: 2001-10-31
Also published as: JPH0533851Y2

Description

[Brief explanation of the drawing]

第１図乃至第５図は本考案の一実施例を示すも
ので、第１図は断面図、第２図は要部正面図、第
３図はトーシヨンバネの斜視図、第４図はシヤツ
タ板閉塞状態の要部側断面図、第５図は開放状態
の要部側断面図、第６図乃至第８図は従来の技術
を示すもので、第６図は部分正面図、第７図と第
８図はトーシヨンバネ係止部分の断面図である。１６…換気扇枠体、１７…シヤツタ板、１８…
連結杆、１９…トーシヨンバネ、３１…係止部、
３２…Ｌ型係止部。 Figures 1 to 5 show an embodiment of the present invention. Figure 1 is a sectional view, Figure 2 is a front view of the main parts, Figure 3 is a perspective view of the torsion spring, and Figure 4 is a shutter plate. FIG. 5 is a side sectional view of the main part in the closed state, FIG. 5 is a side sectional view of the main part in the open state, and FIGS. 6 to 8 show conventional techniques. FIG. 8 is a sectional view of the torsion spring locking portion. 16... Ventilation fan frame body, 17... Shutter board, 18...
Connection rod, 19... Torsion spring, 31... Locking part,
32...L-shaped locking part.

Claims

[Scope of Claim for Utility Model Registration] 1. A ventilation fan frame that supports an electric motor that drives the blower blades, a shutter body that is openable and closable at the outlet side opening of the ventilation fan frame, and installed between the shutter body and the ventilation fan frame. A ventilation fan comprising: a torsion spring; one end of the torsion spring is formed with a locking part to a shutter body; and the other end is formed with an L-shaped locking part to a ventilation fan frame perpendicular to a torsion surface of the torsion spring. 2. Practical use in which a plurality of shutter plates are pivotally supported on a ventilation fan frame, a shutter body is formed by a connecting rod for opening and closing in conjunction with the plurality of shutter plates, and a locking portion of a torsion spring is locked to the connecting rod. A ventilation fan according to claim 1 of the patent registration claim. 3. The ventilation fan according to claim 1 or 2 of the utility model registration claim, in which the shutter body is biased in the opening direction by a torsion spring. 4. A practical application in which the shutter body is opened by wind pressure, closed by its own weight, biased in the closing direction by a torsion spring when the shutter body is closed, and biased in the opening direction after the shutter body is initially opened by wind pressure. A ventilation fan according to claim 3 of the patent registration claim.