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EP-4379178-B1 - AN ACTUATION DEVICE FOR A WINDOW

EP4379178B1EP 4379178 B1EP4379178 B1EP 4379178B1EP-4379178-B1

Inventors

  • CAVALCANTE, TONI
  • KOMAR, Kresimir

Dates

Publication Date
20260506
Application Date
20231201

Claims (15)

  1. An actuation device (100) for frames comprising a movement mechanism (10) and a linear actuator (20) for actuating the movement mechanism (10), the movement mechanism comprising a first arm (1) and a second arm (2) which are articulated to each other by way of articulation means (3), wherein: - a first end (11) of the first arm (1) is connected to a runner (5) which is linearly movable by means of the linear actuator (20) and a second end (12) of the first arm (1) is connectable to the frame, - a first end (21) of the second arm (2) is rotatably connected to a frame structure which is connectable to the frame and an intermediate portion (23) of the second arm (2) is connected to the first arm (1); the articulation means (3) comprising a first pin (31) which is fixed to the first arm (1) and which can slide in a respective guide (41) which is formed in the second arm (2) and a second pin (32) which is fixed to the second arm (2) and which can slide in a respective guide (42) which is formed in the first arm (1), characterized in that it comprises a third pin (33) which can slide in a respective third guide (43), the third pin (33) being fixed to the first arm (1) and the third guide (43) being formed in the second arm (2), and in that the second guide (42) and the third guide (43) at least partially extend in accordance with a curvilinear trajectory (42A, 43A).
  2. An actuation device (100) according to the preceding claim, wherein the third guide (43) extends in the form of a branch of the first guide (41), being connected to the first guide (41) at an intermediate location (40) thereof.
  3. An actuation device (100) according to the preceding claim, wherein the curvilinear trajectory (42A) of the second guide (42) comprises a circumferential arc having a radius of curvature (R2) which is different from a respective circumferential arc (R3) which is defined by the curvilinear trajectory (43A) of the third guide (43).
  4. An actuation device (100) according to the preceding claim, wherein the radius of curvature (R2) of the circumferential arc which is formed by the second guide (42) is greater than the radius of curvature (R3) of the circumferential arc which is formed by the third guide (43).
  5. An actuation device (100) according to any one of the preceding claims, wherein the first pin (31) and the third pin (33) are aligned in a longitudinal extent direction of the first arm.
  6. An actuation device (100) according to any one of the preceding claims, wherein the first guide (41) comprises a first section (41A), the intermediate location (40) being defined in the region of an end of the first section (41A), the movement mechanism (10) being configured in such a manner that the first pin and third pin (31, 33) both slide in the first section (41A) when the first and second arms (1, 2) are substantially aligned with each other.
  7. An actuation device (100) according to the preceding claim, wherein the first section is rectilinear.
  8. An actuation device (100) according to any one of the preceding claims, wherein the third guide (43) comprises a tilted section (43B) which connects the curvilinear trajectory (43A) to the first guide (41) in the region of the intermediate location (40).
  9. An actuation device (100) according to the preceding claim, wherein the tilted section (43B) extends in the region of the intermediate location (40) tilted with respect to a longitudinal extent direction of the first guide (41).
  10. An actuation device (100) according to any one of the preceding claims, wherein the first guide (41) comprises, in addition to the first section (41A), a second section (41B), which is preferably rectilinear and which is separated from the first section (41A) by means of the intermediate location (40), and a tilted section (41C) which follows the second section (41B).
  11. An actuation device (100) according to the preceding claim, wherein the second section (41B) is rectilinear.
  12. An actuation device (100) according to claim 8 or 9 and claim 10 or 11, wherein the tilted section (41C) of the first guide and the tilted section (43B) of the third guide extend laterally relative to the first and second sections (41A, 41B) of the first guide (41) in the direction of the same side.
  13. An actuation device (100) according to any one of claims 10 to 12, wherein the distance between the first pin (31) and the third pin (33) in the longitudinal extent direction of the first arm (1) is such that, when the third pin (33) is in the region of the intermediate location (40), the first pin (31) is in the tilted section (41C) of the first guide (41).
  14. An actuation device (100) according to any one of the preceding claims, when dependent on claim 3, wherein the distance (d1) between the first pin (31) and the third pin (33) is substantially equal to the radius of curvature (R3) of the curvilinear trajectory (43A) of the third guide (43).
  15. An actuation device (100) according to any one of the preceding claims, when dependent on claim 3, wherein the distance (d2) between the second pin (32) and a travel limit stop location (44) of the first guide (41) is substantially equal to the radius of curvature (R2) of the curvilinear trajectory (42A) of the second guide (42).

Description

The present invention relates to an actuation device for frames of the type comprising a pair of arms which are articulated to each other, and which can be actuated by means of a linear actuator. In the field of the technical sector of automation of frames, there are known a great variety of solutions for opening windows by means of motorized mechanisms. In particular, it is known to provide mechanisms which are suitable for making a window carry out a folding opening and closing movement. An example of such mechanisms is described in the European patent application EP1801340 A1, in which a scissor type mechanism is used for the movement of the window. The opening and closing of the scissor type mechanism is obtained by means of a linear actuation which is suitable for moving together and apart two arms of the scissors by means of the movement of a runner. There is provided in both arms a guide, inside which a respective pin slides during the opening/closing movement of the mechanism. These guides substantially develop in two portions with a first portion which has a substantially linear development while following the linear portion the guide which is formed in the arm which is hinged to the frame structure of the window has a curvilinear development. This actuation mechanism and other known actuation mechanisms are not always found to be particularly effective for the adequate use of the power of the motor and for allowing an optimum compromise between the capacity for applying sufficient force in the opening and closing steps of the window, spatial requirements and speed of movement of the window. In fact, it must be observed that known actuation systems with scissor type or quadrilateral mechanisms, particularly as a result of the intrinsic characteristics of such mechanisms, have a capacity for initial thrust which is virtually zero, given that the levers are located very open with the window closed and therefore geometrically in a particularly disadvantageous condition. In fact, scissor type and quadrilateral mechanisms increase the thrust capacity thereof gradually with the tendency of the angle between the arms to close. Naturally, for reasons of spatial requirement, with a closed window the arms of the scissors are substantially aligned and, for this reason, the angle between them is only a few degrees. Under this condition, though applying a significant force to actuate the levers, the force applied thereby for urging the window and to open it is very low. Consequently, the known systems which use scissor type mechanisms or quadrilateral mechanisms are mainly used in windows with transom hopper type opening or more generically with hinges which are mounted in the lower portion of the frame structure. These types of window do not in fact require highly performing automation with a good capacity for thrust from the first few centimetres of travel given that it is the weight itself of the window which promotes the opening thereof. The known systems which are provided with scissor type or quadrilateral mechanisms are, however, found to be very poorly suitable for also being used in bay windows or windows with hinges at the top, where the weight in this state acts in an unfavourable manner and runs counter to the opening direction. Other examples of opening devices for windows are disclosed in FR 1417759, AT 269677 and AT 250208. This problem may generally be evident in all the situations in which great forces are required to move the window, therefore, for example, in the case of windows with great dimensions or in the case in which "bonded" seals are present, a phenomenon which is brought about by a state of closure which has lasted for some time with concomitant high temperatures, or by the fact of being partially frozen during winter time or caused by particular environmental situations, such as the presence of powerful cross-winds. Furthermore, still for intrinsic reasons connected with the characteristics of the known scissor type mechanisms, there often occur vibration phenomena of the window during the opening and closing movement thereof. Therefore, the problem addressed by the present invention is to provide an actuation device for frames which is structurally and functionally configured to at least partially overcome one or more of the disadvantages set out with reference to the cited prior art. Another object of the present invention is to provide an actuation device which is suitable for ensuring high performance levels even in the initial portion of the opening step and/or in the final portion of the closing step of the window. Another object of the present invention is to provide an actuation device which is relatively compact and structurally simple so as to be able to be integrated in the frame structures of frames with conventional shapes and dimensions. Another object of the present invention is to limit the vibration phenomena during the opening and closing of the window. An object