TW201607478A - Device for rotating the shaft of a roller blind either a such like product - Google Patents

Abstract

Device for rotating the shaft (12) of a roller blind or such like, comprising a roller (5) for coupling with said shaft. A chain (7) either a cord running over said roller. Said roller is supported in a housing (1, 21) such that when a force higher than a given value is exerted, said roller will be drawn out of said housing. The side walls (8) of said roller (5) are provided with conical cavities in which support members (3, 10, 11) are received being taken up in said housing and from which at least one is resilient pressed against said roller. Said housing being fixedly connected to a building either a part (21) of this and being connected via a secondary roller (24) to a chain (25) driving the shaft (1, 2) of said roller blind.

Description

Device for rotating a roller blind or a shaft member like this

The invention relates to a device for rotating a roller blind or a shaft member thereof, the device comprising at least one roller that can be coupled directly or indirectly to the shaft member, the operating chain or the rope being guided to the roller Above, the drum can be rotated by the chain.

In the case of conventional roller blinds, the operating chain or the cord has the shape of a loop that hangs down from the drum that is attached to the roller blind. In the following, there will be a brief statement of the chain, and the invention is not limited thereto.

Now, it has appeared that for children who are putting their heads through the loop while playing, or that the loop will accidentally reach above their head, this hanging loop can be dangerous. . In practice, such accidents have occurred.

Now, the object of the present invention is to improve this disadvantage, and for that purpose, the drum on which the operating chain is guided is rotatable in the following manner The ground is supported in the outer casing such that when the force exerted on the chain is above a given value, the drum will be pulled out of the outer casing.

Thus, as long as the force exerted on the chain is not higher than a given value, the device can be used in a normal manner for rotating the drum and thereby operating the roller blind.

Now, if a force higher than, for example, 6 kilograms is applied to the chain by a child, or in another way, the drum will leave the outer casing so that force will no longer be applied to the chain.

According to an embodiment of the invention, the side wall of the drum is provided with a substantially conical bore, and a support member of a suitable shape is received in both cavities by the two sides and is detained in the outer casing, and At least one of the support members is thereby resiliently pressed against the drum.

In particular, the side wall of the drum may be a substantially conical bore, the complementary portion of the sliding member being receivable in a side wall and being constrained to move within the outer casing and resiliently biased toward The roller is configured to receive a complementary portion of the coupling member in the other side wall of the roller, the coupling member is supported in the outer casing, and a matching plane of the roller and the coupling member is provided with a mechanism, The coupling member will rotate with the roller by the mechanism, and the coupling member is coupled directly or indirectly to the shaft member of the roller blind.

Preferably, the two side walls of the drum will be provided with corresponding cavities such that the rollers in each of the two positions can be received in the housing. Obviously, the complementary portion of the sliding member will be made such that the drum can freely rotate thereon.

In order to couple the drum to the coupling member, in the side wall of the drum The surface of the tapered bore and those surfaces of the tapered surface of the coupling member may be provided with ribs extending according to the decribing line of the tapered surface.

According to an embodiment of the invention, the outer casing can be made such that it can be attached to a wall, a plane, a frame or the like, and is suitable for supporting a roller blind or a shaft member such as that.

For new roller blinds that must be installed, this will be without any difficulty. For use in existing roller blinds, the installation of such devices will bring work so that this will not be done quickly.

In accordance with the present invention, in accordance with the present invention, if the outer casing is formed as a longitudinally extending free part, the drum is rotatably supported in the part and can be pulled out of the outer casing in the manner described above, and by at least one gear The drum can drive a second roller rotatably supported in the outer casing, and the chain can be guided over the second roller, the chain being further guided over the roller for rotating the roller blind or A shaft member of this type.

In the case of existing roller blinds, the primary operating chain can be made shorter and can be guided over a second roller in the housing. The outer casing will then hang over the roller blind for a relatively short distance and the operating chain overhanging the outer casing will be protected in the manner indicated above, because when too much force is exerted on the chain, the drum can It is pulled out of the casing.

1‧‧‧Shell

2‧‧‧ parts

3‧‧‧Sliding members

4‧‧‧ Spring

5‧‧‧Roller

6‧‧‧ surrounding surface

7‧‧‧Chain

8‧‧‧ side surface

9‧‧‧ cavity

10‧‧‧ Corresponding parts

11‧‧‧ coupling member

12‧‧‧ shaft parts

21‧‧‧ Shell

22‧‧‧ screws

23‧‧‧ Gears

24‧‧‧second roller

25‧‧‧Main operating chain

The prior embodiment of the present invention shown in this figure is further illustrated 1 is a side view showing a first embodiment of the device according to the present invention in its active position; FIG. 2 is a cross-sectional view showing the device of FIG. 1 according to a line II-II in FIG. 1; 3 shows a side view of the device of Figure 1, but after the drum is pulled out of the device; Figure 4 shows a cross-sectional view of the device of Figure 3 according to the line IV-IV in Figure 3; Figure 5 shows a A side view of a second embodiment of the apparatus, wherein the apparatus is implemented as a separate part and in the active position; FIG. 6 is a cross-sectional view of the apparatus of FIG. 5 according to the line VI-VI of FIG. Figure 7 shows a side view of the apparatus of Figure 5 after the drum has been pulled out of the apparatus; and Figure 8 shows a cross-sectional view of the apparatus of Figure 7 in accordance with section VIII-VIII of Figure 7.

Figures 1-4 show a device comprising a housing 1 provided with a mechanism such as a screw hole for connecting a part 2 of a gear transmission not further shown.

The sliding member 3 is present in the outer casing 1 and is acted upon by the spring 4 such that it is pressed against the peripheral surface 6 of the drum 5, the chain 7 being Running over the drum, the chain can drive the drum in a conventional manner. Both side surfaces 8 of the drum 5 are provided with a substantially conical bore 9. The corresponding part of the sliding member 3 is rotatably received in one of the cavities, and the corresponding part 10 of the coupling member 11 can be received in the other cavity. The fitting part of the part 10 and the tapered bore 9 in the drum 5 is made such that when the drum is rotated, the drum 5 will rotate the coupling member. A roller blind, or a shaft member 12, which is not further shown, is fixedly coupled to the coupling member 11.

When the chain 7 is to be loaded in the normal manner, the drum 5 will be rotated and thereby rotate the shaft member 12 for operating the roller blind. However, if too high a force is exerted on the chain 7, the roller presses against the sliding member 3 against the force of the spring 4 and snaps over the part 10 of the coupling member 11 and It will fall down as shown in Figures 3 and 4.

The drawings 5-8 show a device in which the parts corresponding to the parts used in this case of the above device are indicated by the same numerals. In the case of this embodiment of the device, the outer casing 21 comprising two parts as indicated in Figure 5, or more parts as indicated in Figure 7, is utilized. These parts are connected to each other by screws 22.

In this case, the roller 5 is supported on both sides by the sliding member 3 and is acted upon by the spring 4. Furthermore, the chain 7 is guided over the periphery 6 of the drum 5. When too high a force is applied to the chain 7, the drum will be pulled out of the outer casing 21 in the same manner as shown in Figures 7 and 8.

The drum 5 is now coupled to the second drum 24 via one or more gears 23 in its active position, the second drum being rotatably received in the outer casing 21. The primary operating chain 25 extends over the second roller 24 and is used to directly rotate the roller blind or the shaft member of the same.

With regard to the normal implementation of a roller blind having a primary operating chain extending above a reasonable height, the primary chain 25 is now made shorter so that the outer casing 21 is positioned adjacent the shaft of the roller blind.

It will be apparent that only two possible embodiments of the device according to the invention are shown in the drawings and described above, and that many modifications can be applied without leaving the concept of the invention, as in the attached application. Indicated in the scope of the patent.

1‧‧‧Shell

2‧‧‧ parts

3‧‧‧Sliding members

4‧‧‧ Spring

5‧‧‧Roller

6‧‧‧ surrounding surface

7‧‧‧Chain

8‧‧‧ side surface

12‧‧‧ shaft parts

Claims (5)

A device for rotating a roller blind or the like (12), the device comprising at least one roller (5) coupled directly or indirectly to the shaft member (12), operating the chain (7) or Is a rope that can be guided over the drum, the drum (5) being rotatable by the chain, characterized in that the drum (5) on which the operating chain (7) is guided is used as a kind When the force exerted on the chain is higher than a given value, the drum (5) will be rotatably supported in the outer casing (1, 21) in such a manner that it is pulled out of the outer casing (1, 21). A device for rotating a roller blind or a shaft member (12), such as the first aspect of the patent application, wherein the side wall (8) of the roller (5) is provided with a substantially conical cavity (9), A support member (3, 10, 11) formed into a suitable shape is received in the cavity by both sides and is held in the outer casing (1, 2), and at least one support member (3) is thereby Pressed against the drum (5) elastically. The device of claim 2, wherein the side wall (8) of the roller (5) is provided with a substantially conical cavity (9), A complementary portion of a sliding member (3) can be received in a side wall (8) and is constrained to be movable in the outer casing (1, 21) and resiliently pressed against the drum for coupling A complementary portion of the member (11) can be received in the other side wall (8) of the drum (5), the coupling member (11) being rotatably supported in the outer casing (1), the drum (5) And a matching plane (8) of the coupling member (11) is provided with a mechanism by which the coupling member rotates together with the roller, the coupling The member (11) is connected directly or indirectly to the shaft member (12) of the roller blind. A device for rotating a roller blind or a shaft member (12) according to the third aspect of the patent application, wherein the two side walls (8) of the roller (5) are provided with corresponding holes (9) so that A drum in each position of the position can be mounted in the outer casing (1, 21). A device for rotating a roller blind or a shaft member (12) according to the first aspect of the invention, wherein the outer casing (21) is embodied as a longitudinally extending member, the roller (5) being rotatably supported In the extension member and beyond the outer casing, the drum (5) can be guided in the second by at least one gear (23) rotatably supported in the outer casing (21) A main chain (25) above the drum (24) drives a second drum (24) that runs over the drum on the other side for rotating the roller blind or the shaft member (12).