JPH0450396Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of application of the invention] This invention connects multiple blinds installed on curved windows such as bay windows at the head box end of each blind, and converts the slat angle of all the blinds at one point. The present invention relates to a bending window blind that can be operated using an operating section, and particularly relates to a connecting device for connecting each blind in such a bending window blind.

[Conventional technology]

Traditionally, the slat rotation axes of multiple blinds are connected at their ends, and the slat angles of multiple blinds can be changed using a single operating unit. This is used for polygonal windows such as bay windows. A commonly used blind connecting device is one in which the slat rotating shafts of the blind are connected by a flexible shaft. An example of such a conventional structure is shown in FIG.

In FIG. 8, 10a, 10b, and 10c are respectively blinds arranged along a curved window surface, 11a, 11b, and 11c are respective head boxes, and 12a, 12b, and 12c are slat rotation axes.

The slat rotation shafts 12a, 12b, 12c are interconnected at their ends by a flexible shaft 13, and when the rotation shaft 12b is rotated by rotating one rotary operation shaft 14, this rotation is caused by the flexible shaft 13. is transmitted to the rotating shafts 12a, 12c through the slats 12a, 12c, thereby converting the angles of the slats of all the blinds 10a, 10b, 10c together.

However, this structure in which rotation is transmitted by a flexible shaft has the drawback that the resistance to rotation changes depending on the angle formed by adjacent blinds, and as the angle becomes more acute, the operating force becomes heavier.

Furthermore, a structure in which the slat rotating shafts of each blind are connected by a universal joint has also been proposed. Examples of such structures are shown in FIGS. 9 and 10. In this structure, the connecting portion 14 of the universal joint is connected to two pivots 1
5a, 15b to the end members 16a, 16b of the respective slat rotation shafts 12a, 12b. In such a structure, the head box 11 is connected so as to be bent at the two pivots 15a and 15b centering on the connecting portion 14.
When bending a and 11b along the window surface, the bending angle of the universal joint and the bending angle of the head box do not match, as shown in FIG. 10, and there is a possibility that they may deviate.

The above-mentioned deviation causes resistance to the rotation transmission of the universal joint, and in the worst case, there is a problem that excessive force is applied to the joint, resulting in damage.

[Purpose of invention]

The present invention solves the problems of the conventional coupling device described above, eliminates the disadvantages of coupling using a flexible shaft, and provides a blind for a curved window in which the bending angle of the universal joint and the bending angle of the head box do not deviate. An object of the present invention is to provide a coupling device.

[Summary of the idea]

The connecting device for blinds for curved windows according to the present invention connects the slat rotating shafts of multiple blinds at their ends, making it possible to change the slat angles of multiple blinds using a single operating unit. In a blind connecting device used for a window that bends into a polygon, the rotating shaft connecting member that connects the ends of each slat rotating shaft is composed of a universal joint with two pivots, and the end of the head box of the blind The pair of box connecting members that connect the box connecting members are composed of a connecting portion made of a pair of horizontally protruding flat plates and a cylindrical bearing portion that engages with the head box. A first groove and a second groove are provided, and the pair of flat plate connecting portions of the other box connecting member have a first protrusion and a second groove that engage with the first groove and the second groove, respectively. The first groove has a circular arc shape whose radius is the distance from one point of the two pivots of the universal joint to the other point, and the second groove has a protrusion that extends from the first groove. The displacement angle of the straight line connecting the first protrusion moving along the groove and the other second protrusion is formed by a curve that is twice the displacement angle of the straight line connecting the two pivots of the universal joint. It is characterized by:

〔Example〕

Hereinafter, the present invention will be explained based on embodiments shown in the drawings.

FIG. 1 is an exploded perspective view showing the coupling device of the present invention. In the figure, 1 shows the rotating shaft coupling member, 2 and 3 show the head box coupling members, and FIGS. 2, 3, and 4 show the assembly of the coupling device. They are a plan view, a sectional view, and a bottom view showing the state.

As shown in the drawings, the connecting device includes a rotating shaft connecting member 1 that connects the rotating shaft of the blind and transmits rotation;
It is comprised of headbox connecting members 2 and 3 attached to the headbox and regulating the bending angle of the headbox. The rotating shaft connecting member 1 connects a pair of joint bodies 1c, 1c having a cylindrical body having a non-circular recess that engages with the rotating shaft and a connecting portion that engages the connecting piece 1b, and a pair of connecting pieces. It is composed of a connecting body 1a and forms a universal joint with two pivots. The head box connecting members 2 and 3 are formed by a pair of horizontally protruding flat connecting portions 2a, 2a', 3a, 3a' and cylindrical bearing portions 2b and 3b that rotatably support the joint bodies 1c and 1c. The flat connecting portions 2a, 2a' of one connecting member 2 are provided with arc-shaped first and second grooves 2c, 2c', respectively, for regulating the relative angular position with respect to the other connecting member 3. The flat connecting portions 3a, 3a' of the other connecting member 3 are provided with first and second protrusions 3c, 3c' that engage with the grooves 2c, 2c'.

As shown in Fig. 5, the first groove 2c and the second groove 2c' are in the shape of an arc whose center is at one point at the center of the two pivots of the universal joint and whose radius is the distance to the other point. a second groove 2c';
When the second protrusion 3c' moves along this second groove 2c', the other first protrusion 3c and second protrusion 3
The groove 2c is formed by a curve such that the displacement angle β of the right angle connecting c′ is twice the displacement angle α of the straight line connecting the two pivots of the universal joint.

Other embodiments of the above-mentioned grooves 2c and 2c' are shown in FIG.
It is shown in FIG. In this embodiment, each of the second grooves 2c' has the same shape as the second groove 2c' shown in FIG. 4, but each of the first grooves 2c can be bent only to one side. (Fig. 6) and by blocking the center part, the bending direction can be restricted to only one side, and by changing the engagement position of the protrusion, it is also possible to make it possible to bend only to the other side (Fig. 7) Although this embodiment differs from the above-mentioned embodiment in this respect, it functions similarly.

[Effect]

The line connecting the two pivot axes 1b, 1b of the connecting body 1a of the universal joint 1 is the first line when the angle formed by the rotational axes of the two connected head boxes is 0°, that is, the bending angle of the head boxes is also 0° and the line is in a straight line. As shown in Fig. 5, it coincides with line A-A'.
One of the two pivots is always located on the second protrusion 3c' of the headbox connecting member 3, and moves within the second groove 2c' from point B' to point C' as the headbox is bent. The other pivot is always on point A of the head box connecting member 2, and when the head box bending angle is 90° and the axis of the rotating shaft on the head box connecting member 3 side coincides with the C-C' line, the universal joint The displacement angle α' of the straight line connecting the two pivot axes is 45°. At this time, the displacement angle β' of the straight line (C-C' line) connecting the first protrusion 3C and the second protrusion 3C' is equal to the bending angle of the head box, so it is 90°.
Therefore, the displacement angle β' is twice the displacement angle α', and ideal bending is performed without applying excessive force to the universal joint.

[Effect of idea]

As mentioned above, according to the connecting device of the present invention, the bending angle of the universal joint and the bending angle of the head box always maintain a constant relationship, and this is achieved by the engagement of the groove and the protrusion, so that the bending angle of the universal joint and the bending angle of the head box are maintained in a constant manner. If you bend the head box of the blind along the same line, the universal joint will also be bent relatively to the corresponding position, and as the bend angle of the head box changes, the bend angle will always be maintained at 1/2 of the bend angle, so the operating force will be reduced. Since the connecting members 2 and 3 can be engaged with each other due to the elasticity of the flat plate portion without becoming heavy or being damaged due to load applied during operation, it is possible to provide an inexpensive connecting device with a small number of parts.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view showing a coupling device for a bent window blind according to the present invention; FIGS. 2, 3, and 4 are plan views showing the assembled state of the coupling device shown in FIG. 1, respectively; Sectional view and bottom view, No. 5
The figure is an explanatory diagram illustrating the relationship between the groove and the protrusion in the above-mentioned coupling device, FIGS. 6 and 7 are plan views showing other embodiments of the coupling device, and FIG. 8 is a front view showing a conventional example. 9 and 10 are plan views showing other conventional examples. 1... Rotating shaft connecting member, 2, 3... Head box connecting member, 2c, 2c'... Groove, 3c, 3
c′……protrusion.

Claims (1)

[Scope of utility model registration request] Connecting blinds used for polygonally curved windows such as bay windows, which connects the slat rotation axes of multiple blinds at their ends and allows the slat angles of multiple blinds to be changed using a single operating unit. In the device, the rotating shaft connecting member connecting the ends of each slat rotating shaft is constituted by a universal joint having two pivots, and the pair of box connecting members connecting the ends of the head box of the blind project horizontally. It is composed of a pair of flat plate connecting parts and a cylindrical bearing part that engages with the head box, and the pair of flat connecting parts of one box connecting member are provided with first grooves and second grooves,
The pair of flat connecting portions of the other box connecting member are provided with a first protrusion and a second protrusion that engage with the first groove and the second groove, respectively, and the first groove is a universal joint. The second groove is formed into a circular arc whose radius is centered on one point of the center of the two pivots and the distance to the other point, and the second groove is connected to the first protrusion that moves along the first groove and the other groove. The displacement angle of the straight line connecting the second protrusion is 2 of the universal joint.
A coupling device for a blind for a curved window, characterized in that it is formed by a curved line that is twice the displacement angle of a straight line connecting the pivot axes of the parts.