CN111386377A

CN111386377A - Lifting device for installation in a roof window, comprising a carriage system, and roof window comprising such a lifting device

Info

Publication number: CN111386377A
Application number: CN201880075485.7A
Authority: CN
Inventors: 拉塞·温瑟·赫德; 耶斯佩尔·赖伯格
Original assignee: VKR Holding AS
Current assignee: VKR Holding AS
Priority date: 2017-11-24
Filing date: 2018-11-26
Publication date: 2020-07-07
Anticipated expiration: 2038-11-26
Also published as: DK201770888A9; EA202091014A1; WO2019101280A1; EP3714124A1; EP3714124B1; CN111386377B; DK179893B1; DK179893B9; DK201770888A1; PL3714124T3

Abstract

A lifting device (10) intended for roof windows, comprising: a lifting arm (14); a spring assembly (20) having a first coupling member; and a carriage system (30) configured to be slidably connected to a portion of the roof window and including a carriage (31) and a second coupling member configured to mate with the first coupling member. The first end (12) of the lifting arm (14) is rotatably connected with the carriage system (30) and the second end (13) is configured to be connected to another part of the roof window. The carriage system (30) further comprises a slide (32) having at least two surfaces, a slide inner surface and a slide outer surface, the carriage (31) having at least two surfaces, a carriage inner surface and a carriage outer surface, the slide (32) comprising at least one wall portion (321, 322), and the slide (32) being configured to receive the carriage (31) against the slide inner surface, and the slide (32) being provided with at least one recess (324) opposite a corresponding receiving recess (314) in the carriage (31), the recess (314, 324) forming part of the second coupling member.

Description

Lifting device for installation in a roof window, comprising a carriage system, and roof window comprising such a lifting device

Technical Field

The invention relates to a lifting device for a roof window, in particular for installation in an inclined roof surface, comprising: a lift arm; a spring assembly having a first coupling member; and a carriage system configured to be slidably connected to a portion of the roof window, and comprising a carriage and a second coupling member configured to mate with the first coupling member, wherein a first end of the lift arm is rotatably connected with the carriage system and a second end is configured to be connected to another portion of the roof window. The invention also relates to a roof window incorporating such a lifting device.

Background

In roof windows mounted in inclined roof surfaces, operating wholly or partly about a top hinge axis, it is known to counterbalance at least part of the weight of the movable part by means of a lifting device interposed between a fixed frame and a pair of associated side members of the sash element respectively, and having one end pivotally connected to one of the side members, while the other end of the lifting device is hinged to a sliding shoe displaceable along the other side member, said shoe being biased in one direction by a spring assembly so as to exert an outwardly directed pressure on the sash element by means of a rod. The purpose of this arrangement is to facilitate opening of the window and the dimensions may be selected such that the springs are able to keep the top hinged frame balanced in the desired open position.

The offset carriage system or sliding shoe of such a lifting device is mounted on and moves parallel to or along the side frame member or side sash element. The sliding shoe typically slides in a guide mounted on the respective sash or frame member. The spring assembly biasing the sliding shoe is positioned generally parallel to the respective sash or frame member. During opening and closing of the window, the sliding shoe slides in the guide, pushing the lifting arm connecting the sliding shoe and the intermediate frame or sash member to or from the parallel position. The rotation of the lifting arm about the axis in the sliding shoe requires means for connecting these two parts in a rotatable manner.

Lifting devices for roof windows using sliding shoes are known and can be found, for example, in EP0408655B1 of the applicant, EP0408655B1 of the applicant relating to a window, in particular a window designed to be mounted in a sloping roof, comprising: a frame; a window sash hinged to the main frame at a top thereof; and a sash lifting arm interposed between the frame and the sash, and having one end pivotally connected with the lateral frame or sash member, and the other end pivotally connected with a slider displaceable along the corresponding lateral member of the sash or frame, respectively, and associated with a pre-stressed spring. Another example is found in EP 0733146B 1 of the applicant, whose EP 0733146B 1 relates to a window, in particular mounted in an inclined roof surface, comprising a main frame and a frame hinged to the top of the main frame, and a frame lifting arm interposed between the main frame and the frame, said arm having one end pivotally connected with a lateral member of the main frame or the frame, and the other end of said arm being pivotally connected with a sliding shoe which is connected in a longitudinally displaceable manner with a corresponding lateral member of the frame or the main frame, respectively, and which sliding shoe is associated with a prestressed lifting spring, while a coupling member on the sliding shoe is adapted to engage with a coupling member connected with the lifting spring when the window is mounted in a mounted position. In the solutions disclosed in the above-mentioned documents, in general, the sliding shoes described in the above-mentioned documents are arranged in direct contact with the corresponding lateral members of the fixed frame or sub-frame in a longitudinally displaceable manner. Because of the relatively large forces involved, sliding shoes of the type described herein must be strong enough to withstand the moments transmitted from the lift arm and spring assembly, and therefore such sliding shoes are typically made of wear resistant materials, such as metal alloys or similar alloys. The movement of the metal sliding shoes on the guides or frame members generates friction which may lead to irregular sliding of the sliding shoes and thus to inaccurate operation of the roof window lifting device. Furthermore, over time, the same friction causes wear on the sliding shoe and the corresponding guide or frame member, resulting in a poor fit between the parts, only further worsening the result. In view of the extensive damage that is to say to the sliding shoe, the frame and/or the guide, possible solutions may be limited to replacing the entire lifting device or even the entire roof window frame.

In view of this, it is currently a challenge to provide a roof window lift having a slide that can withstand the current load requirements while providing a consistently smooth, accurate and efficient use of the slide, while providing a solution for easy replacement of the slide.

Disclosure of Invention

It is therefore an object of the present invention to provide a roof window lifting device wherein the sliding shoe, or carriage system, is provided with means for permanently sliding connection with the corresponding frame member or guide, thereby providing a smooth sliding and thereby achieving an accurate and efficient operation of the roof window lifting device.

This is achieved by a roof window lifter of the kind mentioned in the introduction, which is further characterized in that the carriage system further comprises a slide having at least two surfaces, a slide inner surface and a slide outer surface, the carriage having at least two surfaces, a carriage inner surface and a carriage outer surface, the slide comprising at least one wall portion and the slide being configured to receive the carriage against the slide inner surface, and the slide being provided with at least one recess opposite a corresponding receiving recess in the carriage, the recess forming part of the coupling member. By providing a slide bar accommodating the carriage and thus being located between the carriage and the frame member or guide, friction between the carriage and the frame member or guide is avoided. Thus, extensive damage to the frame member or guide is avoided. Further, wear caused by friction generated between the slide and the frame member or the guide is easily corrected by replacing only the slide. Finally, the functionality of the lifting device is not impaired by the slide around the carriage, since the matching recess can safely couple the carriage system to the spring assembly without specific precautions.

In a preferred embodiment, the lifting device further comprises a carriage guide for guiding the movement of said slide. The guide provides a smooth surface along which the carriage can slide. Thus, the provision of the guide allows a smoother and more accurate overall operation of the carriage system. Furthermore, the guide may provide one or more side portions having the function of guiding the carriage during operation of the lifting device. This guiding function ensures that the carriage follows a predictable and repeatable path in the lifting device, thereby achieving a smooth simultaneous operation when two or more lifting devices are mounted between the roof window fixing frame and the sash frame. The clearance that exists between at least one end face of the shaft and the guide ensures that the friction between these parts and thus the accumulated friction when operating the lifting device is reduced. This reduced friction helps to achieve a smoother and more accurate overall operation of the lifting device.

By "precise operation of the lifting means" is meant here that the opposing fixed frame and the movable sash element are aligned in a substantially parallel manner, causing said opposing members to be closely juxtaposed in the closed window position. "precise operation of the lifting device" also means that the operation of the lifting device requires a predictable amount of force, since the extension spring is biased to be transferred to the lifting arm with reduced resistance.

In another embodiment, the carriage and/or the slide further comprises means for reducing movement between the slide inner surface and the carriage outer surface. This embodiment is particularly advantageous in that the holding force between the carriage and the slide as two separate parts is increased. In a preferred embodiment, the fixation device is a removable fixation device. By providing such a removable fixing means, two advantages are achieved. First, undesired movement between the two components is reduced. This ensures an increased compliance of the carriage in the slide, which results in a smoother lateral displacement of the carriage in the frame member or guide and a smoother overall operation of the lifting device. Second, and because the securing means is removable, the slide bar can be easily detached from the carriage, allowing a convenient method for removing and replacing the slide bar from the carriage if needed.

In one embodiment, the means for reducing movement between the slide bar inner surface and the carriage outer surface comprises an elastic upstanding portion in the slide bar and a corresponding opening in the carriage opposite the elastic upstanding portion. This arrangement enables the resilient upright to secure the carriage through a corresponding opening in the carriage, thereby providing a firm contact point on the slide against which the carriage can abut in the presence of forces urging the two parts in opposite directions or in the same direction at unequal accelerations. Furthermore, this arrangement allows for easy disassembly, as the carriage can simply be disengaged from the slide bar without obstruction.

In another embodiment, the means for reducing movement between the slide inner surface and the carriage outer surface comprises at least one flange on at least one slide wall portion arranged to abut the carriage. This arrangement constitutes another equally advantageous solution to removably fix the carriage to the slide.

In another embodiment, at least a portion of one of said slide wall sections is thinner than the other of said wall sections, and the first axial head section is thinner than the second axial head section. With the thinner slider wall portion and the nose section, the lifting arm may be arranged in close alignment with the subframe or sash, thereby reducing the degree of skewing of the lifting arm as it contacts both the shaft associated with the main frame and the subframe. The absence of a degree of skewness makes the operation of the lifting device smoother and more accurate when opening and closing roof windows.

In another embodiment, the carriage comprises at least one constriction formed by at least one section of the wall portion that is non-parallel with respect to the other wall portion. By means of the constriction, a gap is created between the carriage wall and the frame member or guide. Such a gap may be advantageous when inserting the shaft into the carriage wall.

In one presently preferred embodiment, wherein the lifting device further comprises a shaft connected to the first end of the lifting arm, the slide bar further comprises a bowl portion arranged to receive the shaft, and the carriage comprises a corresponding opening opposite the bowl portion. Thus ensuring correct control and guidance of the movement of the lifting arm during operation. The shaft may for example be adapted to further contact at least one cut-out in the slide wall portion. The cut-out facilitates the direct insertion of the shaft into the carriage system during assembly. In addition, the cut-out edge may extend circumferentially along the edge of the shaft end face, thereby further providing support and stabilization to the shaft. By stable is here meant that the cut-out edge will help to keep the shaft in place by reducing the possibility of lateral displacement of the shaft inside the wall of the carriage.

In a second aspect of the invention, there is provided a roof window incorporating such a lifting device.

Other presently preferred embodiments and advantages will be apparent from the accompanying description and drawings.

Drawings

In the following description, embodiments of the invention will be described with reference to the schematic drawings in which:

fig. 1 is a perspective view of a roof window seen from the inside and in an open position;

fig. 2 is a perspective view of a detail of the roof window with a lifting device in a first embodiment of the invention and corresponding to the open position of the roof window of fig. 1;

figure 3 is an isometric view of a detail of the roof window of figure 2 in the closed position of the window;

FIG. 4 is a partial exploded view of the detail of FIG. 3;

FIG. 5 is an isometric view of the spring assembly shown in FIG. 3;

FIG. 6 is a partial isometric view, on a larger scale, of the spring assembly shown in FIG. 5;

FIG. 7 is a partially exploded isometric view of some of the elements of FIG. 6;

figures 8a to 8e are isometric views of the elements of figure 7;

FIG. 9a is a partial isometric view, on a larger scale, of the detail shown in FIG. 3;

FIG. 9b is a partially exploded perspective view of a detail of a lifting device in another embodiment of the present invention;

figures 10 and 11 are partial isometric views of details of a lifting device for a roof window in a second embodiment of the invention;

fig. 12a to 12h are schematic partial side views of an embodiment of a roof window of the invention during coupling and uncoupling of the lifting device;

fig. 13a to 13b, 14a to 14b and 15a to 15b are perspective views of details of a roof window in a second embodiment;

figure 16 shows a schematic perspective view of a detail of a roof window in a further embodiment of the invention;

fig. 17 shows a schematic side view of a detail of a roof window in a further embodiment of the invention;

fig. 18a to 18e are views of details of a roof window in a third embodiment, corresponding to fig. 8a to 8e, respectively;

fig. 19a to 19b are views of details of the roof window in the third embodiment, corresponding to fig. 13a to 13b, respectively;

fig. 20a is a view corresponding to fig. 14a of a detail of a roof window in a third embodiment;

figure 20b is a partial perspective view of a detail of the roof window in the third embodiment; and fig. 21 to 24 show a detailed partial or whole view, exploded view, or sectional view of a roof window in another embodiment of the invention.

Detailed Description

Referring first to fig. 1, the general configuration of a roof window is shown which is top hinged during normal operation and which pivots for cleaning. Such a window is shown and described in more detail in applicant's above-mentioned european patent No. 0733146B1, the contents of which are incorporated herein by reference. In fig. 1, a lifting device 10 is shown, and referring now also to fig. 2 to 9, which lifting device 10 forms part of a first embodiment of a roof window according to the invention.

The roof window comprises a main frame in the form of a fixed frame 1, which fixed frame 1 is configured to be mounted in an inclined roof surface. To the fixed frame 1 at least one sub-frame is connected, which in the embodiment shown is a first sub-frame in the form of a sash 2 carrying a pane 4 and a second sub-frame in the form of an intermediate frame 3. The intermediate frame 3 is fastened to the fixed frame at the top mounting fitting 5 and the sash 2 is hinged to the fixed frame 1 via the intermediate frame 3 at the top of the roof window, so that the roof window is top-hung during normal operation. The sash 2 is also pivotally connected to the intermediate frame 3 to enable rotation of the sash 2 to provide access to the outside of the pane 4, for example for cleaning purposes. For this purpose, the intermediate frame 3 is provided with a frame hinge 6 of a pivoting hinge fitting. Although not shown in detail, it is clear to the skilled person that the sash 2 is provided with a mating sash hinge part of a pivot hinge fitting.

The lifting device 10 comprises a spring device 20 and a carriage system 30, the spring device 20 and the carriage system 30 cooperating to assist in opening the window, that is, moving the sub-frame to an angular position relative to the main frame. Here, the user operates the operating means of the window from the closed position, which operating means is in the form of a handle 7 at the bottom member of the sash 2. The biasing of the spring means 20 of the lifting device 10 acts on the lifting arm 14 interposed between the fixed frame 1 and the intermediate frame 3. The lifting arm 14, in turn, exerts a moment on the intermediate frame 3 and therefore on the window pane, with respect to the axis passing through the top hinge pin 11. The moment generated by the weight of the sash 2 and the pane 4 is overcome in combination with the force exerted by the user on the handle 7, which is converted into a lifting moment. Closing the window from the open position requires a reverse movement of the sash 2 and the related parts of the lifting device 10. Similar lifting devices may be provided on each side of the roof window. Finally, the roof window is provided with ventilation means 8 for allowing air to pass through also in the closed position of the window.

In more detail, the lifting arm 14 has a first end 12 and a second end 13, the first end 12 being rotatably connected with a carriage system 30, the carriage system 30 in turn being slidably connected with the main frame 1 in a carriage guide 16, the second end 13 being rotatably connected with the at least one sub-frame 3, the lifting device 10 further comprising a spring assembly 20 configured to be coupled to the carriage system 30. Since the carriage system 30 is connected to the lift arm 14, the spring assembly 20 is in turn configured to be connected to the first end 12 of the lift arm 14 by means of a coupling mechanism, such that the spring assembly 20 is able to assume a decoupled state and a coupled state with respect to the carriage system 30. This coupling mechanism is the subject of the applicant's co-pending patent application filed on the same day as the present invention.

Briefly, the coupling mechanism of the embodiment shown in the figures comprises a first coupling member 21, which first coupling member 21 is adapted to cooperate with a second coupling member associated with the carriage system 30. In the first embodiment, the second embodiment shown in fig. 10 to 11 and 13a to 15b, and the third embodiment shown in fig. 18a to 20b, the second coupling member comprises a carriage 31 forming part of a carriage system 30, and the carriage 31 comprises receiving means configured to cooperate with the first coupling member 21 in the coupled state. In all the embodiments shown, the first coupling member comprises a hook element 21 to cooperate with a second coupling member, comprising a receiving means 31 of the second coupling member, which receiving means 31 is formed in the carriage system 30 and is configured to cooperate with said hook element 21 in the coupled state. The hook element 21 is configured to assume at least a non-engaging position and an engaging position, and the coupling mechanism further comprises a coupling plate 25, the coupling plate 25 being arranged to assume at least a first position corresponding to the coupled condition and a second position corresponding to the uncoupled condition, the coupling plate 25 allowing the hook element 21 to assume said non-engaging position. The operation of the presently preferred embodiment is described in further detail in connection with fig. 12a to 12h of the applicant's co-pending international application filed on the same day as the present application and claiming priority to DK PA 201770889, to which specific reference is made herein.

Fig. 5 and 6 show conventional components of a spring assembly 20 for a roof window. Further details and advantages of the particular spring assembly 20 are the subject of applicant's co-pending patent application filed on the same day as the present application and are shown in fig. 21-24 for informational purposes only. However, the present invention is applicable to any kind of spring assembly. Thus, the conventional components of a spring assembly are: a buffer spring system 28 serving as an auxiliary system to the main spring system 29. In order to adapt the same spring assembly to different roof inclinations, an adjustment device in the form of a movable adjustment plate 26 is provided, which movable adjustment plate 26 is seated in one of several recesses 27a in a spring housing 27 accommodating a damping spring system 28.

More details of the carriage system 30 are shown in the second embodiment in fig. 10 to 11 and 13a to 15b and in the third embodiment in fig. 18a to 20 b. Elements having the same or similar functions as in the first embodiment are provided with the same reference numerals.

Referring now in particular to fig. 10 to 11, 13a to 13b and 15a, the carriage 31 of the carriage system 30 comprises a bottom portion 310, a first wall portion 311 and a second wall portion 312, preferably one receiving recess 314 is provided at each of the transition between the first wall portion 311 and the bottom portion 310 and the transition between the second wall portion 312 and the bottom wall portion 310, and wherein a hole 315 is provided in the first wall portion 311 and a hole 316 is provided in the second wall portion 312 for receiving the shaft 40 connected to the first end 12 of the lifting arm 14. Finally, the carriage 31 is provided with a second opening 318 and a cutout portion 319 to make room for the rest of the lifting device 10.

In the third embodiment of the roof window shown in fig. 19a to 19b, the carriage 31 is made longer than those in the first and second embodiments. This provides greater strength to the carriage 31. Therefore, the cutout portion 319 is made longer.

In the presently preferred embodiment described herein, the receiving means of the second coupling member comprises at least one receiving recess 314 in the carriage 31 of the carriage system 30. Other shapes for the second coupling member are also possible. One conceivable alternative solution would be to use the shaft 40 as a receiving means. This alternative solution is shown as a fourth embodiment shown in fig. 20.

Further details of the shaft 40 shown in fig. 17-19 are given for informational purposes only and are the subject of applicant's co-pending patent application filed on the same day as the present application.

In order to more accurately control the frictional forces when the carriage system 30 is moved in the carriage guide 16, the carriage system 30 of the present invention comprises a slide bar 32, which slide bar 32 is configured to accommodate the carriage 31 and is provided with at least one recess 324 opposite the corresponding receiving recess 314 of the carriage 31.

The slide bar 32 of the carriage system 30 includes: a slide 32, the slide 32 having at least two surfaces, an inner slide surface and an outer slide surface; and a carriage 31, the carriage 31 having at least two surfaces, a carriage inner surface and a carriage outer surface, the slide 32 comprising at least one

wall portion

321, 322, and the slide 32 being configured to receive said carriage 31 against said slide inner surface of the slide 32, and wherein said slide 32 is provided with at least one recess 324 opposite a corresponding receiving recess 314 in said carriage 31.

In the embodiment shown, the slide bar 32 is guided in the carriage guide 16. Alternatively, the slide bar 32 may be guided directly in the main frame 1.

Further, the carriage 31 and/or the slide bar 32 comprise means for reducing the movement between the inner surface of the slide bar and the outer surface of the carriage. In the embodiment shown, the means for reducing the movement between the inner surface of the slide and the outer surface of the carriage comprise an elastic upright portion 327 in the slide 32 and a corresponding opening 317 in said carriage 31 opposite said elastic upright portion 327.

In the illustrated embodiment, other means for reducing movement between the slide inner surface and the carriage outer surface include at least one flange on the at least one

slide wall portion

321, 322 arranged to abut the carriage 31.

As shown, at least a portion of one

slider wall portion

321, 322 is thinner than the

other wall portion

321, 322, and the first

axial head section

321a, 322a is thinner than the second

axial head section

321a, 322 a.

The carriage 31 further comprises at least one constriction 313, said at least one constriction 313 being formed by at least one section of the

wall portion

311, 312 that is non-parallel with respect to the

other wall portion

311, 312. In this way, a gap is created between the carriage wall and the frame member or guide.

In the illustrated embodiment, the slide bar 32 further comprises a bowl portion 323 arranged to receive the shaft 40, and the carriage 31 comprises a corresponding opening 317 opposite the bowl portion 323. The bowl section 323 and the opening 317 are arranged such that the distance between the bowl section 323 and the carriage first wall portion 311 is greater than the distance between the bowl section 323 and the carriage second wall portion 312.

The slide 32 further comprises at least one cut-out 325, 326 in at least one

wall portion

321, 322 arranged to receive the shaft 40.

The slide 32 here also comprises an edge portion 328 on at least one end which is a cutout.

In the illustrated embodiment, the slide bar 32 is formed from a plastic material, such as POM, which may also be provided with a material such as POM

A coating made or other treatment with a function as a lubricant to reduce friction.

The constriction 313 on the slide 32 is formed due to the availability of space. By forming the slide taper on one side, 322a can be made thicker and the tolerance adjusted on the side where 322 is located-in this way, the shaft 40 is guided so that the end 402 does not protrude and wear on one side of the guide.

The edge portion 328 is provided as a cut-out to allow room for the rest of the assembly. The flange portion 329 scrapes the guide to push dirt, for example, accumulated in the carriage guide toward the side of the guide.

Turning now to a more detailed representation in fig. 17, the shaft 40 is arranged such that there is a gap between at least one end face of the shaft 40 and the guide 16. In the illustrated figures, this clearance is achieved by the shaft being shorter than the width of the slide 32, thereby creating a clearance between the shaft 40 and components that may be in contact with the slide 32. In the image shown, the space created is equally divided between the two shaft end faces, creating a gap at both ends of the shaft 40. In any case, it is intended that the shaft 40 does not come into direct contact with the fixed frame 1 or with the guides 16 if the guides 16 are present.

The slide bar 32 houses a carriage 31, which carriage 31 houses the shaft 40 through a carriage wall portion aperture. The slide and the carriage together form a carriage system which is connected to the spring assembly via a linkage mechanism as shown in fig. 12 d. The bias of the spring assembly 20 of the lifting device 10 acts on the lifting arm 14 interposed between the fixed frame 1 and the intermediate frame 3 by the transmission of a torque between the spring or springs in the spring assembly and the carriage 31 via a coupling mechanism which drives the carriage system to slide and transmits the torque to the lifting arm via a shaft, as shown in fig. 12 c. The shaft of the present invention is arranged to withstand and efficiently transmit these relatively large forces. For this purpose, the shaft is arranged to be in contact with a bowl-shaped portion in the carriage 31 or the slide bar 32, as shown in fig. 17, as appropriate. The bowl is arranged to receive the shaft and thereby partially transfer the pressure applied by the lifting arm to the carriage system, thereby supporting the shaft. In the shown figures the bowl is arranged to provide sufficient space between the bowl and the carriage for accommodating the lift arm end 12 in the space. In any case, it is known to the person skilled in the art that the shaft of the invention is arranged in contact with the bowl-shaped part in an effective manner for supporting the shaft.

Also in fig. 17, the shaft 40 is arranged in contact with at least one cut-out 325, 326 in the

wall portion

321, 322 of the slide 32. The cut-out edge may be arranged to extend circumferentially along the edge of the shaft end face to provide further support to the shaft and to help hold the shaft in place by reducing the likelihood of lateral displacement of the shaft within the wall portion of the carriage 31.

The invention has been described above with reference to a sash and a frame of a roof window, but it will be appreciated that the invention is also applicable to other frame structures, such as for example door frames.

List of reference numerals

1 Main frame (fixed frame)

2 first subframe (Window sash)

3 second subframe (middle frame)

4 pane glass

5 Top mounting fitting

6 frame hinge of a pivoting hinge fitting

7 handle

8 ventilating device

10 lifting device

11 hinge pin

12 first end of a lift arm

13 second end of the lifting arm

14 lifting arm

15 Top support fitting

16 carriage guide

20 spring assembly

21 first coupling member/hook element

210 vertex

211 orifice

212 substrate portion

213 Flange portion

214 hook part

215 rounded transition edge portion

216 inclined edge portion

217 Top portion

217a recess in the top portion

218 bottom edge portion

219 inclined edge portion

22 draw bar

221 rod part

222 head part

223 first inclined portion

224 second inclined portion

225 adjusting ring

23 degree angle element

231 orifice

231a enlarged orifice section

232 upright leg

233 bottom leg

234 projecting flange

235 gap

24 end piece

241 aperture

242 upstanding wall

243 projecting part

244 projecting flange

244a rib portion

245 track

246 curved flange portion

25 connecting plate

251 rectangular opening

252 base portion

253 bottom flange

254 cut

255 upstanding lug

26 adjusting plate

27 spring housing

27a recess for adjusting the plate

28 buffer spring system

281 external spring

282 inner spring

283 spring plug

284 spring plug

29 main spring system

291 spring

292 spacer tube

30 carriage system

31 second coupling member/carriage

310 bottom part

311 first wall portion

312 second wall portion

313 narrowing

314 receiving recess

315 hole

316 hole

317 first opening

318 second opening

319 cutting part

32 sliding strip

320 bottom part

321 first wall part

321a first axial head section

322 second wall portion

322a second axial head section

323 bowl-shaped part

324 concave part

325 cut

326 incision

327 resilient upstanding portion

328 edge portion

329 flange part

40 shaft

401 threaded end

402 another end portion

403 mark

404 position mark

50 friction braking device

51 Friction braking element

52 first cone

53 second cone

54 spring plug

Claims

1. A lifting device (10) for a roof window, in particular a roof window mounted in an inclined roof surface, the lifting device (10) comprising:

a lifting arm (14);

a spring assembly (20), the spring assembly (20) having a first coupling member; and

a carriage system (30), the carriage system (30) configured to be slidably connected to a portion of the roof window and the carriage system (30) comprising a carriage (31) and a second coupling member configured to mate with the first coupling member,

wherein a first end (12) of the lifting arm (14) is rotatably connected with the carriage system (30) and a second end (13) of the lifting arm (14) is configured to be connected to another part of the roof window,

it is characterized in that the preparation method is characterized in that,

the carriage system (30) further comprises a slide (32), the slide (32) having at least two surfaces, a slide inner surface and a slide outer surface, the carriage (31) having at least two surfaces, a carriage inner surface and a carriage outer surface, the slide (32) comprising at least one wall portion (321, 322), and the slide (32) being configured to receive the carriage (31) against the slide inner surface, and the slide (32) being provided with at least one recess (324) opposite a corresponding receiving recess (314) in the carriage (31), the recess (314, 324) forming part of the second coupling member.

2. Roof window lifting device according to claim 1, wherein the lifting device further comprises a carriage guide (16), the carriage guide (16) being used to guide the slide (32) during movement.

3. Roof window lifting arrangement according to any of the claims 1 or 2, wherein the carriage (31) and/or the slide (32) further comprises means for reducing movement between the slide inner surface and the carriage outer surface.

4. A roof window lifting device according to claim 3, wherein the means for reducing movement between the slide inner surface and the carriage outer surface comprises an elastic upright (327) in the slide (32) and a corresponding opening (317) in the carriage (31) opposite the elastic upright (327).

5. Roof window lifter device according to any of claims 3 and 4, wherein the means for reducing movement between the slide inner surface and the carriage outer surface comprises at least one flange on the at least one slide wall portion (321, 322) arranged to abut the carriage (31).

6. Roof window lifter according to any of the preceding claims, wherein at least a part of one of the runner wall parts (321, 322) is thinner than the other of the wall parts (321, 322), and wherein a first axial head section (321a, 322a) of the runner wall part (321, 322) is thinner than a second axial head section (321a, 322a) of the other runner wall part (321, 322).

7. Roof window lifting arrangement according to any of the preceding claims, wherein the carriage (31) further comprises at least one constriction (313), the at least one constriction (313) being formed by at least a section of a wall portion (311, 312) which is non-parallel with respect to the other wall portion (311, 312).

8. Roof window lifting arrangement according to any of the preceding claims, wherein the slide bar (32) further comprises a bowl-shaped portion (323), the bowl-shaped portion (323) being arranged to receive a shaft (40), the shaft (40) being connected to the first end (12) of the lifting arm (14), and the carriage (31) comprising a corresponding opening (318) opposite the bowl-shaped portion (323).

9. Roof window lifting arrangement according to claim 0, wherein the bowl section (323) and the opening (318) are arranged such that the distance between the bowl section (323) and the carriage first wall portion (311) is larger than the distance between the bowl section (323) and the carriage second wall portion (312).

10. Roof window lifter according to any of claims 8 and 9, wherein the slide (32) further comprises at least one cut-out (325, 326) in at least one wall portion (321, 322) arranged to receive the shaft (40).

11. Roof window lifter according to any of claims 8 to 10, wherein the carriage (31) further comprises at least one hole (315, 316) in at least one wall portion (311, 312) arranged to receive the shaft (40).

12. Roof window lifter according to any of the preceding claims, wherein the slide (32) further comprises an edge portion (328) as a cut-out on at least one end.

13. Roof window lifter according to any of the preceding claims, wherein the slide (32) further comprises a flange portion (329) on at least one end.

14. Roof window lifter device according to any of the preceding claims, wherein the runner (32) and/or the carriage (31) are formed of a plastic material, such as POM.

15. Roof window lifter according to any of the preceding claims, wherein the slide (32) and/or the carriage (31) is provided with a lubricating coating for reducing friction.

16. Roof window, in particular mounted in an inclined roof surface, comprising a main frame (1), at least one sub-frame (2, 3), such as a sash (2) and/or an intermediate frame (3), and at least one lifting device (10) according to any one of claims 1 to 0, wherein the lifting arm (14) is interposed between the main frame (1) and the at least one subframe (2, 3), the lifting arm (14) having a first end (12) and a second end (13), the first end (12) is rotatably connected to the carriage system (30), the carriage system (30) is slidably connected with the main frame (1) in the carriage guide (16), the second end (13) is rotatably connected with the at least one subframe (3).