JPS637784Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a ventilation fan in which a shutter is pivoted to the upper end of the opening of the ventilation fan body and urged in the opening direction, and the shutter is closed by pulling a drawstring when not in use. This makes it easier to install the shutter, and also prevents the shutter from being easily removed once it has been installed.

The present invention will be explained below with reference to the drawings. Reference numeral 1 denotes a ventilation fan body, in which a fan motor 3 is mounted in a wind tunnel 2, and a recess 4 for mounting a shutter, which opens rearward, is formed in the upper side of the wind tunnel. On the ceiling surface of this recess, there are a pair of triangular protrusions 6 for locking a shutter opening coil spring 5, which will be described later.
6 is provided in the depth direction, and a pair of guide pieces 7, 7 which are higher than the lower end A of this protrusion are provided on the bottom in parallel with this triangular protrusion, and a shutter 8 is provided on both sides of the opening of this recess. Concave grooves 9, 9 that lock the pivots of
is formed.

The shutter 8 has a spring housing groove 10 that opens rearward at its upper end, and a pivot shaft 11 integrally projects horizontally from both sides of the groove. In the natural state, the coil springs 5, 5 housed in the groove 10 have one end side 12 and the other end side leg 13 protruding in a substantially perpendicular direction, and the other end side leg 12 and the other end side leg 13 protrude in the natural state, as shown in FIG. At the tip of 13, an engaging portion 15 is formed by bending inward. As shown in FIG. 1, the engaging portion 15 is engaged with the rear vertical edge 14 of the triangular protrusion 6 when the shutter 8 is installed in a predetermined position, and the engagement portion 15 is engaged with the rear vertical edge 14 of the triangular protrusion 6. Unless the engaging part 15 is deformed because the guide piece 7 is higher than the lower end A of the triangular protruding piece 6 at the joining part 15,
It does not come off the rear end vertical edge 14. Furthermore, the engaging portion 1
5 is formed with a bent portion 16 bent downward, and the bent portion 16 forms an L shape together with the engaging portion 15, and is hooked on the guide piece 7 to prevent the coil from attaching the shutter 8. Recess 4 of spring 5
This will guide you on how to install it.

The coil spring 5 having such a shape is housed in the groove 10, and one end 12 of the coil spring 5 is passed through a through hole 17 formed in the lower surface of the groove 10 so as to come into elastic contact with the back surface of the shutter 8. The end leg 13 is rotated approximately 90 degrees in the direction of unwinding the coil portion against the elasticity of the spring 5, and is fitted into the notches 18, 18 formed on the upper surface of the groove portion 10. It elastically engages with a locking piece 19 formed in the opening of the coil spring 5, and holds both coil springs 5, 5 in the groove 10 by their own elasticity. When the coil springs 5, 5 are installed in this manner, the legs 13 of both springs protrude on the same plane as the shutter 8, as shown in FIG.

To attach the shutter 8 to the ventilation fan body 1, hold the shutter horizontally and
3 and 13 close to the recess 4 of the ventilation fan main body, place the engaging parts 15 and 15 of the coil springs on the guide pieces 7 and 7 on the ventilation fan main body side, and push them toward the back. At this time, the bent portions 16, 16 of the coil spring slide along the opposing inner surfaces of the pair of guide pieces 7, 7, so that by simply pushing the shutter 8, the engaging portion 15 of the coil spring can be easily moved into the shutter mounting recess. It goes all the way to the back of location 4 and does not slide excessively from side to side and become misaligned. When the engaging portions 15, 15 of the coil spring are pushed in along the guide pieces 7, 7, the engaging portions come into contact with the slopes of the triangular projecting pieces 6, 6 and ride up on them. The lowest end A of the slope is lower than the upper edge B of the guide piece 7, but since the coil spring 5 can be easily twisted, there is no problem in riding up the slope. When the slope is climbed over, the engaging portions 15, 15 become triangular protrusions 6,
6 and engages with the rear vertical edge 14, and the pivot shafts 11, 11 of the shutter fall into the grooves 9, 9.
The shutter 8 is fitted to the ventilation fan main body 1. Reference numeral 20 denotes a drawstring whose one end is connected to the free end side of the shutter 8. By pulling the drawstring, the shutter 8 is
is closed, and when released, the force of the coil springs 5 opens the shutter 8 until it is in a substantially horizontal position. Since the lowermost ends A of the triangular protrusions 6, 6 are lower than the upper edges B of the guide pieces 7, 7, they are once engaged with the rear vertical edge 14 of the triangular protrusions 6, 6. The engaging portion 15,1 of the coil spring
5 cannot be easily removed from the triangular protrusions 6, 6. That is, the engaging parts 15, 15 of the coil spring
When lowered, it hits the upper edge of the guide pieces 7, 7, and normally does not fall any further, so the engaging parts 15, 15 are difficult to come off from the triangular protrusions 6, 6. Therefore, even if the shutter 8 flaps due to wind when it is open, it will not come off from the ventilation fan body 1. Further, a vertical retaining piece 21 is provided between the pair of guide pieces 7, and a bent portion 16 formed at the tip of the coil spring comes into contact with both sides of the retaining piece 21. The role of this retaining piece 21 is as follows. That is, when removing the shutter 8, remove the bent portions 16, 1 at the tips of the two coil springs.
It looks like the number 6 is crossed.

However, if there is a retaining piece 21 in the center, the bent portions 16, 16 will come into contact with this retaining piece, so they cannot cross each other, and therefore the coil spring's retaining portion 15
Since the engagement between the rear vertical edge 14 of the triangular protrusion and the rear vertical edge 14 of the triangular projection does not come off, the shutter 8 will never come off from the ventilation fan main body 1.

As described above, the present invention provides a pair of triangular protrusions 6, 6 on the ceiling surface of the recess 4 provided at the upper end of the ventilation fan body for locking the legs of the coil spring 5 provided on the shutter 8 side, and Lower end A of this protrusion
Since a pair of guide pieces 7 are provided which are higher than the height, the legs of the coil spring are once connected to the triangular protrusion pieces 6,
If it falls into the rear side of shutter 6, it will not come out easily, and even if the wind blows strongly, shutter 8 will not come off. Furthermore, since a vertical retaining piece 21 is provided between the pair of guide pieces 7, 7, the shutter becomes more complete, and there is no possibility that the shutter will come off during use.

[Brief explanation of the drawing]

Fig. 1 is a vertical side view of a ventilation fan equipped with the proposed shutter mounting structure, Fig. 2 is an exploded perspective view before installing the spring to the shutter, Fig. 3 is a rear view of the shutter, and Fig. 4 is the same as Fig. 3. A sectional view, FIG. 5 is a front view of a recess for installing a shutter provided on the side of the ventilation fan body, and FIG. 6 is a slope view of the main part of the shutter. 4... recess, 5... coil spring, 6...
Triangular projecting piece, 7... Guide piece, 8... Shutter plate, 11... Pivot, 13... Leg, 16... Bent part, 21... Retaining piece.

Claims (1)

[Scope of utility model registration request] A pair of pivots protruding horizontally from the upper edge of the shutter plate are engaged with both sides of the opening of a recess provided at the upper end of the ventilation fan body, and a pair of coil spring legs protruding from the shutter plate are connected to the In a device that locks in a recess, the end of the leg is formed with an engaging part bent inward and a bent part where the tip of the engaging part is bent downward, A pair of triangular protrusions are formed in the depth direction on the ceiling surface to guide the deformation of the engaging portion of the coil spring and at the same time lock the engaging portion at the rear end vertical edge. forming a pair of guide pieces higher than the lower end of the triangular protrusion in parallel with the triangular protrusion that guides the rear end of the triangular protrusion and prevents the engaging part from coming off the rear vertical edge of the triangular protrusion; A ventilation fan shutter mounting structure comprising a vertical retaining piece that prevents deformation of the bent portion between the pair of guide pieces.