CN210264350U

CN210264350U - Window frame material connecting assembly, window frame connected by same and window unit

Info

Publication number: CN210264350U
Application number: CN201920917469.XU
Authority: CN
Inventors: 陈睿璟
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-06-18
Filing date: 2019-06-18
Publication date: 2020-04-07
Anticipated expiration: 2029-06-18

Abstract

The embodiment of the utility model discloses under the condition that need not to demolish the frame that has installed in the wall body opening, the window frame that the window type can alternate as required wantonly, wherein the inside casing material of window frame passes through according to the utility model discloses a coupling assembling is connected. In an embodiment of the invention, the casement window sash and the push-pull window sash can be interchangeably installed in the window frame without dismantling the outer frame already installed in the wall opening, wherein the inner frame material and the outer frame material of the window frame all comprise a first notch suitable for installing the casement window sash and a second notch suitable for the push-pull window sash. Furthermore, in one embodiment of the present invention, the same common profile is used for the inner frame material and the outer frame material.

Description

Window frame material connecting assembly, window frame connected by same and window unit

Technical Field

The utility model relates to an aluminum alloy window makes the field, especially relates to a window frame material coupling assembling, by window frame and window unit that this subassembly is connected.

Background

The aluminum alloy window has the characteristics of attractive appearance, sealing and high strength, is widely applied to the field of constructional engineering, and is commonly used for packaging balconies in home decoration.

In the process of connecting the inner frame material of the window frame to the outer frame in the related art, holes are formed in the outer frame and the inner frame material is connected to the outer frame by screws. In this process, the position of the opening in the outer frame is measured by the tape measure by the operator, and therefore there is a possibility that a measurement error may occur. In the aluminum alloy window in the prior art, only one of a casement window and a sliding window can be installed in the same wall opening, if the casement window and the sliding window need to be replaced and changed, an outer frame installed in the wall opening needs to be detached, and great potential safety hazards exist in the detaching process. In the prior art, a composite window exists, a casement window and a sliding window can be simultaneously installed in the same wall opening, but the casement window can only be installed at the leftmost side or the rightmost side, the position of the casement window cannot be changed after the casement window is installed, and if the casement window needs to be changed, an outer frame needs to be detached. The existing aluminum alloy window sliding window section bar has the connection mode between the outer frame and the slideway as follows: the outer frame is punched, screws are connected with the slide way in the horizontal direction, the number of the screws is only 2-3, the screws are always acted by force in the vertical direction, and the outer frame is easy to damage, short in service life and potential safety hazard exists.

In addition, in the manufacturing process of the window frame in the prior art, more than 90% of the outer frame section bars with the length being less than 60cm are discarded for the sliding window, and more than 90% of the outer frame section bars with the length being less than 40cm are discarded for the casement window. The cost of the discarded section bar is transferred to the final consumer in the last stage. In the prior art, an aluminum alloy sliding integrated window with fixed glass is manufactured, and at least required section bars of an outer frame are as follows: the glass pressing frame comprises 7 types of frames, an upper slide, a lower slide, a fixing frame, a center column, a frame cover plate and a glass pressing line; the aluminum alloy flat-open integrated window with the fixed glass is manufactured, and the section bars at least needed by the outer frame are as follows: frame material, middle support and glass pressing line, 3 types in total. For downstream processing enterprises, only one style of sliding window and casement window is manufactured, only the outer frame profile is needed to be reserved for at least 10 types, and the inventory and capital pressure are very large. For upstream aluminum alloy rolled material production enterprises, at least 10 extrusion dies need to be stored, and in the production process, the processes are multiple, the energy consumption is high, the efficiency is low, the delivery period is long, and the cost is high.

Because the aluminum alloy window has extremely strong personalized requirements, the aluminum alloy window uniformly manufactured and installed by real estate developers can not meet the requirements of most consumers, so that most consumers can thoroughly disassemble the aluminum alloy window connected with the sash installed by the developers and order the aluminum alloy window required by the developers in the building material market again. However, the cost of the aluminum alloy window is included in the house purchase cost of consumers, the fish eyes in the building material market are mixed, the quality is uneven, and the price system is disordered. The end consumer spends more money, generates more waste, and does not necessarily buy an aluminum alloy window with quality meeting the national standards.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, an embodiment of the utility model expects to provide a window frame material coupling assembling, by window frame and the window unit that this subassembly is connected for the window type of window frame can alternate at will, can realize using less section bar kind and practice thrift and make the section bar, can realize exchanging between flat-open casement and the push-and-pull casement.

The technical scheme of the utility model is realized like this:

in a first aspect, embodiments of the present invention provide a connection assembly for detachably connecting an inner frame material to be connected of a window frame to a connected frame material at any position along its longitudinal axis, wherein the inner frame material is made of an inner frame material profile defining a profile cavity extending along its longitudinal axis, the connection assembly being adapted to fit into the profile cavity via an open end of the inner frame material to be connected, and wherein the connected frame material is made of a connected frame material profile comprising a first slot extending along its longitudinal axis, the first slot having a slot stop edge, and the first slot being adapted to mount a casement window sash,

the connecting assembly includes:

a first connecting member including a first bevel portion inclined with respect to a longitudinal axis of the inner frame material;

a second connecting member including a second bevel portion inclined with respect to the longitudinal axis of the inner frame material and cooperating with the first bevel portion;

a stud connected to the bottom of a stud hole formed in the first connecting member by a spring and having a longitudinal axis perpendicular to a longitudinal axis of the inner frame material with the connecting assembly fitted into the profile cavity, the stud being configured to protrude outside the profile cavity via a first aperture opened in an outer peripheral wall of the inner frame material with the spring in a natural state and to retract inside the profile cavity with the spring compressed;

a bolt and a nut configured to mate with each other to connect the first and second ramp portions together, wherein a longitudinal axis of the bolt is perpendicular to the first and second ramp portions; and

a diamond-shaped leaf rotatably mounted by a screw to an end plane of the second connecting member opposite the second ramp portion, wherein the diamond-shaped leaf is fixed to the screw and the plane defined by the diamond-shaped leaf is perpendicular to the longitudinal axis of the inner frame stock with the connection assembly fitted into the profile cavity, the diamond-shaped leaf configured to rotate when the screw is rotated via a second aperture cut in the peripheral wall of the inner frame stock such that it is stopped in the first slot by the slot stop edge with the long diagonal of the diamond-shaped leaf perpendicular to the longitudinal axis of the connected frame stock and can be fitted into or removed from the first slot with the short diagonal of the diamond-shaped leaf perpendicular to the longitudinal axis of the connected frame stock,

wherein, when the bolt and the nut are screwed through a third aperture opened on the outer peripheral wall of the inner frame material, the interval between the first slope part and the second slope part is decreased, and the first connecting member and the second connecting member are moved closer to each other along the longitudinal axis of the inner frame material, so that the stud provided on the first connecting member is pressed against the first aperture, and the diamond-shaped spring provided on the second connecting member is pressed against the notch stopper edge of the connected frame material, thereby firmly connecting the inner frame material to the connected frame material,

wherein when the bolt and nut are unscrewed, the distance between the first and second ramp portions can increase and the diamond shaped spring can move away from the notch stop edge such that the diamond shaped spring can be rotated.

In a second aspect, an embodiment of the present invention provides a window frame, which includes:

a rectangular outer frame for fixing in a wall opening, said outer frame comprising two horizontal outer frame materials parallel to each other and two vertical outer frame materials parallel to each other perpendicular to said horizontal outer frame materials, wherein said outer frame materials are made of outer frame material profiles comprising a first notch extending along its longitudinal axis, said first notch having a notch stop edge and said first notch being adapted for mounting a casement window sash; and

one or more inner frame materials, wherein the inner frame materials are made of an inner frame material profile defining a profile cavity extending along its longitudinal axis and comprising two first notches extending along its longitudinal axis, the two first notches being symmetrically arranged with respect to a plane containing the longitudinal axis of the inner frame material profile and perpendicular to the plane defined by the window frame, and wherein each inner frame material is connected between two parallel connected frame materials, being two outer frame materials, or one outer frame material and one connected inner frame material, or two connected inner frame materials,

wherein the inner frame material is detachably connected to the connected frame material at an arbitrary position along the longitudinal axis thereof by the connecting assembly of the first aspect, so that the window profile of the window frame can be arbitrarily changed as needed without dismantling the outer frame that has been installed in the wall opening.

In a third aspect, embodiments of the present invention provide a modular window unit, which includes one or more of the following modules:

the sliding window sash module comprises a sliding window sash material, a sliding window sash sealing cover plate, a sliding window sash outer frame locking strip, a sliding window sash frame sealing rubber strip, a pulley and a sliding window sash lock;

the casement window sash module comprises a casement window sash material, a casement window sash waterproof baffle, a casement window sash waterproof rubber strip, a hinge and a casement window sash lockset;

the sliding slideway module comprises an upper sliding block, a lower sliding block and a slideway waterproof rubber cushion block, wherein the upper sliding block and the lower sliding block are respectively fixed on two parallel horizontal frame materials through screws;

the fixing part module comprises a pressing line for fixing glass and a corresponding waterproof adhesive tape;

the casement screen sash module comprises screen materials required by a casement screen sash, partition sealing profiles between the screen materials and the sash materials, waterproof rubber strips of the screen sash and hardware fittings required by the screen sash; and

the window frame of the second aspect forms a window frame module.

The embodiment of the utility model provides a window frame material coupling assembling, by window frame and the window unit that this subassembly is connected. The inner frame material to be connected can be detachably connected to any position of the connected frame material along the longitudinal axis of the connected frame material, so that the random change of the window type is realized; the inner frame material and the outer frame material are made of the same section bar, so that the cost is saved; the frame material profile comprises two notches, enabling the exchange between the casement window sash and the sliding window sash to be achieved without dismantling the outer frame.

Drawings

Fig. 1 is a schematic view of a connection assembly for detachably connecting an inner frame material of a window frame to a connected frame material at any position along a longitudinal axis thereof according to an embodiment of the present invention;

FIG. 2 is a detailed view of the connection assembly of FIG. 1;

FIG. 3 shows a schematic view of a diamond shaped spring plate of a connection assembly being stopped in a notch of a connected frame stock;

FIG. 4 shows a front view of a diamond shaped reed and a notch stop edge stopping it;

fig. 5 is a schematic view of a window frame provided in an embodiment of the present invention, wherein a casement window sash and a fixing glass are installed in the window frame;

fig. 6 is a schematic view of another window frame according to an embodiment of the present invention, wherein a sliding sash and a fixed glass pane are installed in the window frame;

fig. 7 is a cross-sectional view of a profile further including a notch for mounting a sliding sash according to an embodiment of the present invention;

fig. 8 is a cross-sectional view of a common profile provided by an embodiment of the present invention;

fig. 9 shows a sectional view of a window frame made of the common profile S shown in fig. 8, taken along a horizontal plane.

Detailed Description

The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

Referring to fig. 1, there is shown a connection assembly C for detachably connecting an inner frame material of a window frame to a connected frame material at any position along a longitudinal axis thereof, in the example shown in fig. 1, the inner frame material is a horizontal inner frame material 15, and the connected frame material is a right outer frame material 14.

The horizontal inner frame material 15 is made of an inner frame material profile defining a profile cavity 15C extending along its longitudinal axis, the connecting assembly C being adapted to fit into the profile cavity 15C via an open end 15E of the horizontal inner frame material 15. The right outer frame material 14 is made of a right outer frame material profile comprising a first notch N1 extending along its longitudinal axis, the first notch N1 having a notch stop edge N10 (see fig. 3), the first notch N1 being adapted to mount a flat-open window sash 20 as shown in fig. 5.

Specifically, referring to fig. 2, the connection assembly C includes: a first connecting member C1, the first connecting member C1 including a first ramp portion C11 inclined with respect to the longitudinal axis 15X of the horizontal inner frame material 15; a second connecting member C2, the second connecting member C2 including a second ramp portion C21 inclined with respect to the longitudinal axis 15X of the horizontal inner frame material 15 and cooperating with the first ramp portion C11; a stud C3 connected to the bottom of a stud hole C32 formed in the first connecting member C1 by a spring C31, and having a longitudinal axis C3X of the stud C3 perpendicular to the longitudinal axis 15X of the horizontal inner frame 15 with the connecting assembly C fitted into the profile cavity 15C, the stud C3 being configured to protrude outside the profile cavity 15C via a first aperture 151 opened on the outer peripheral wall of the horizontal inner frame 15 with the spring C31 in a natural state, and to retract inside the profile cavity 15C with the spring C31 compressed; bolt C41 and nut C42, bolt C41 and nut C42 are configured to cooperate with one another to connect together the first ramp C11 and the second ramp C21, wherein the longitudinal axis C41X of bolt C41 is perpendicular to the first ramp C11 and the second ramp C21.

According to the utility model discloses a coupling assembling C still includes: a diamond shaped leaf C5, a diamond shaped leaf C5 rotatably mounted to an end plane C22 of the second connecting member C2 opposite to the second ramp portion C21 by a screw C51, wherein the diamond shaped reeds C5 are fixed on the screws C51 and the plane defined by the diamond shaped reeds C5 is perpendicular to the longitudinal axis 15X of the horizontal inner frame material 15 with the joining assembly C fitted into the profile cavity 15C, as shown in fig. 4, the diamond-shaped reed C5 is configured to rotate when the screw C51 is rotated through the second aperture 152 opened on the outer peripheral wall of the horizontal inner frame 15, so that the long diagonal line of the diamond-shaped reed C5 is caught in the first notch N1 by the notch catching edge N10 with the long diagonal line perpendicular to the longitudinal axis 14X of the right outer frame material 14, and can be inserted into or removed from the first slot N1 or the first slot N1 with the short diagonal of the diamond shaped reed C5 perpendicular to the longitudinal axis 14X of the right outer frame stock 14.

When the bolt C41 and the nut C42 are screwed through the third aperture 153 opened on the outer peripheral wall of the horizontal inner frame material 15, the interval between the first slope part C11 and the second slope part C21 decreases, and the first connecting member C1 and the second connecting member C2 move closer to each other along the longitudinal axis 15X of the horizontal inner frame material 15, so that the stud C3 provided on the first connecting member C1 is pressed against the first aperture 151, and the diamond-shaped spring C5 provided on the second connecting member C2 is pressed against the notch stopper edge N10 of the right outer frame material 14, thereby firmly connecting the horizontal inner frame material 15 to the right outer frame material 14.

When bolt C41 and nut C42 are unscrewed, the distance between first ramp portion C11 and second ramp portion C21 can increase, and diamond reed C5 can move away from notch stop edge N10 so that diamond reed C5 can be rotated.

Through according to the utility model discloses a coupling assembling C connects window frame material for the window frame can be fixed to the frame in the wall body opening and not realized the random transform of window type under the condition of demolising, as combine specific window frame described in detail below.

In a preferred embodiment of the present invention, as shown in fig. 1, the connecting assembly C further includes an L-shaped reinforcing sheet C6, and the L-shaped reinforcing sheet C6 includes two reinforcing sheet branches C61 and C62, which are fixed to the horizontal inner frame material 15 and the right outer frame material 14 by screws C63, respectively.

Referring to fig. 5 and 6, a window frame 1A and a window frame 1B having different window types according to an embodiment of the present invention are shown.

As shown in fig. 5, the window frame 1A includes a rectangular outer frame 10 for fixing in an opening of a wall, the outer frame including: two parallel horizontal outer frame materials, namely an upper outer frame material 11 and a lower outer frame material 12; and two vertical outer frame materials, i.e., a left outer frame material 13 and a right outer frame material 14, which are parallel to each other, perpendicular to the two horizontal outer frame materials. These profiles are made of a profile of the profile comprising a first notch N1 extending along its longitudinal axis, the first notch N1 having a notch stop edge N10, and the first notch N1 being suitable for mounting a casement window. The window frame 1A further includes two inner frame members, i.e., a horizontal inner frame member 15 and a vertical inner frame member 16. These inner frame materials are made of an inner frame material profile defining a profile cavity extending along its longitudinal axis and comprising two first notches N1 extending along its longitudinal axis, said two first notches N1 being arranged symmetrically with respect to a plane containing the longitudinal axis of the inner frame material profile and perpendicular to the plane defined by the window frame, so that both the left and right sides of the inner frame material profile can be connected to further inner frame materials. It can be seen from fig. 5 that horizontal inner frame material 15 is through according to the utility model discloses a coupling assembling C is connected to left outer frame material 13 and right outer frame material 14, and vertical inner frame material 16 passes through according to the utility model discloses a coupling assembling C is connected to outer frame material 11 and connected horizontal inner frame material 15. The horizontal inner frame member 15 is vertically movably and detachably mounted between the left and right

outer frame members

13 and 14, and the vertical inner frame member 16 is horizontally movably and detachably mounted between the upper outer frame member 11 and the horizontal inner frame member 15.

As shown in fig. 6, the window type of the window frame 1B is different from the window type of the window frame 1A shown in fig. 5 in that the window frame 1B does not include the vertical inner frame material 16 but includes the vertical inner frame material 17 connected between the connected horizontal inner frame material 15 and the lower outer frame material 12 through the connecting assembly C according to the present invention.

In the window unit shown in fig. 5 including the casement window sash 20, since the vertical inner frame 16 is horizontally movably installed between the upper outer frame 11 and the horizontal inner frame 15, the casement window sash 20 may be installed on either the left side of the window frame 1A (as shown in fig. 2) or the right side of the window frame 1A (not shown in the drawings) as needed, and the size of the casement window sash 20 may be selected as needed. Further, the vertical inner frame material 16 may be removed without being installed in the outer frame 10, in which case the casement window sash 20 and the first fixed glass G1 may be replaced by a single piece of fixed glass. The horizontal inner frame work 15 is vertically movably installed between the left outer frame work 13 and the right outer frame work 14, and thus, it is possible to achieve a corresponding technical effect such as changing the size of the second fixed glass G2.

It is thus clear that, through according to the utility model discloses a coupling assembling C connects the frame material of window frame, has realized the random transform of window frame type under the condition that need not to demolish the frame that has installed in the wall body opening. In addition, the connecting assembly C is very convenient to disassemble and assemble, and the process and the efficiency of downstream manufacturing enterprises are optimized.

In addition, through according to the utility model discloses a coupling assembling C carries out the in-process of connecting to the frame material of window frame, need not trompil on the frame, for example the location of the inner frame material that is used for installing flat-open window is decided by the length of line ball, has consequently avoided using the condition that the tape measure probably produced the error among the prior art.

In the case where the user needs to change the window profile of fig. 5 to that of fig. 6, the user need not remove the outer frame 10, but only detach the longer vertical inner frame material 16 of fig. 5 and intercept it to the length of the vertical inner frame material 17 of fig. 6, and then connect the intercepted frame material between the connected horizontal inner frame material 15 and the lower outer frame material 12 through the coupling assembly C of the present invention without additional frame material profiles. Therefore, the embodiment of the utility model discloses a technical effect of saving section bar can be realized.

In a preferred embodiment of the invention, the profile of the outer frame material further comprises a second notch N2 (see fig. 7) extending along its longitudinal axis, the second notch N2 being adapted for mounting a push-pull sash, and the profile of the inner frame material further comprises two second notches N2 extending along its longitudinal axis, the two second notches N2 being arranged symmetrically with respect to a plane containing the longitudinal axis of the profile of the inner frame material and perpendicular to the plane defined by the window frame, so that a casement window sash and a push-pull sash can be interchangeably mounted in the window frame without dismantling the outer frame already mounted in the opening of the wall.

Because the required section bars of the window frame of installation flat-open casement window sash and installation push-and-pull casement are totally different, consequently in above-mentioned technical scheme, at first need with the required standard notch of push-and-pull casement and the standard notch that flat-open casement and fixed line ball shared design simultaneously into above-mentioned sharing section bar according to the interval of standard, will two kinds of notches all set up in same section bar through adjusting the interval promptly.

In case the user needs to convert the window unit comprising a casement window sash shown in fig. 5 into the window unit comprising a sliding window sash shown in fig. 6, the user can easily achieve the above-mentioned transformation without removing the outer frame, since the first and second notches are included in the profiles constituting the frame.

In a preferred embodiment of the present invention, the outer frame material section is the same type of section as the inner frame material section, so that the outer frame material section and the material section are the same type of common section. Fig. 8 is a cross-sectional view of a common section S according to an embodiment of the present invention. The common profile S defines a profile cavity SC extending along its longitudinal axis and comprises two first notches N1 extending along its longitudinal axis, the two first grooves N1 being arranged symmetrically with respect to a plane P containing the longitudinal axis of the common profile and perpendicular to the plane defined by the window frame, and the common profile S comprises two second notches N2 extending along its longitudinal axis, the two second notches N2 being arranged symmetrically with respect to a plane P containing the longitudinal axis of the common profile and perpendicular to the plane defined by the window frame.

Thus, the inner frame material can be made of the outer frame material profiles remaining during the manufacture of the outer frame materials 11-14, without the need for additional frame material profiles. In this case, the utilization rate of the section bar is improved, and the discarding of the section bar is reduced. For example, as can be seen from fig. 6, the length of the vertical inner frame material 17 is short, and the length of the frame material in the window frame can be 30cm at the shortest, so that downstream manufacturers can use all the profiles with the length being greater than or equal to 30cm, thereby reducing the generation of waste materials. In addition, for upstream section bar production enterprises, the types of the section bars are greatly reduced, the number of extrusion dies is greatly reduced, and the production efficiency and the storage and maintenance cost of the dies are greatly optimized, so that the process and the efficiency of the upstream section bar production enterprises are optimized. In addition, the outer frame material, the inner frame material for the sliding window and the inner frame material for the casement window are integrated into the same section, so that the process and efficiency of upstream section production enterprises are optimized.

Fig. 9 shows a sectional view of a window frame made of the common profile S shown in fig. 8, taken along a horizontal plane. As can be seen from fig. 9, the inner frame material and the outer frame material of the window frame are both made of the same common profile according to the present invention, and the window frame can be installed with a casement window sash 20, a sliding window sash 30, a fixed glass G, and a casement window sash 40. As can be seen in fig. 9, the fixed glass G is adapted to be mounted in the window frame by means of a first glass press line 61 and a second glass press line 62 mounted in a first notch N1, and the casement screen 40 is adapted to be mounted by means of a first notch N1. As is known in the art, the glass press line for fixing may be of the same profile and mounted in the same notch as the water-resistant screen of the casement window. In addition, in order to guarantee the safety of fixing the glass, the pressing line is formed by using the section bar which is the same as the waterproof baffle on the outer side of the glass, and the more reliable pressing line is used on the inner side of the glass.

In a preferred embodiment of the present invention, the outer frame material section and the inner frame material section are aluminum alloy sections.

In a preferred embodiment of the present invention, the aluminum alloy profile may be a common aluminum alloy profile or a heat insulation aluminum alloy profile.

The embodiment of the utility model provides a still provide a modularization window unit, this modularization window unit includes one or more in following each module:

a push-pull slideway module, see fig. 6, which comprises an upper slide 51 and a lower slide 52 fixed on two parallel horizontal frames (i.e. an upper outer frame 11 and a horizontal inner frame 15) respectively through screws B, and a slideway waterproof rubber cushion block;

the casement window sash module comprises a screen material required by a casement window sash, a partition sealing section between the screen material and the sash material, a waterproof adhesive tape of the window sash and hardware fittings required by the window sash; and

according to the utility model discloses a window frame module that window frame formed.

In a preferred embodiment of the present invention, referring to fig. 6, the screw B fixes the upper and

lower slides

51 and 52 in such a manner that its longitudinal axis extends in the vertical direction, thereby avoiding the problems of the prior art with screw horizontal connections.

In a preferred embodiment of the present invention, referring to fig. 8, the push-pull window sash module further comprises a removable cover plate H, and when the push-pull window sash is installed in the frame module, the first notch N1 adjacent to the push-pull window sash is covered by the removable cover plate H. Therefore, when the push-pull window sash is installed, the problem of water leakage is avoided, and the attractiveness is ensured. When the casement window sash is installed, the removable cover plate can be easily taken down, and the notch required by the casement window sash can be used.

It should be noted that: the embodiment of the utility model provides an between the technical scheme who records, under the condition of conflict, can make up wantonly.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A connection assembly for detachably connecting an inner frame material to be connected of a window frame to a connected frame material at any position along its longitudinal axis, wherein the inner frame material is made of an inner frame material profile defining a profile cavity extending along its longitudinal axis, the connection assembly being adapted to fit into the profile cavity via an open end of the inner frame material to be connected, and wherein the connected frame material is made of a connected frame material profile comprising a first slot extending along its longitudinal axis, the first slot having a slot stop edge and the first slot being adapted to mount a flat-open sash,

characterized in that, the coupling assembling includes:

2. The connecting assembly according to claim 1, further comprising an L-shaped reinforcing tab including two reinforcing tab branches fixed to the inner frame material and the connected frame material by screws, respectively.

3. A window frame, comprising:

characterized in that the inner frame material is detachably connected to the connected frame material at any position along its longitudinal axis by means of the connecting assembly according to claim 1, so that the window profile of the window frame can be changed as desired without dismantling the outer frame already installed in the wall opening.

4. The window frame of claim 3, wherein the outer frame material profile further comprises a second slot extending along its longitudinal axis, the second slot being adapted for mounting a push-pull sash, and the inner frame material profile further comprises two second slots extending along its longitudinal axis, the two second slots being symmetrically arranged with respect to a plane containing the longitudinal axis of the inner frame material profile and perpendicular to a plane defined by the window frame, such that a side-hung sash and a push-pull sash can be interchangeably mounted in the window frame without dismantling the outer frame already mounted in the wall opening.

5. A window frame according to claim 3 or 4, characterised in that the outer frame material profile is of the same kind of profile as the inner frame material profile, so that the outer frame material profile and the inner frame material profile are of the same common type.

6. The window frame according to claim 3 or 4, wherein the outer frame material profile and the inner frame material profile are aluminum alloy profiles.

7. The window frame of claim 6, wherein the aluminum alloy profile is a common aluminum alloy profile or a heat insulating aluminum alloy profile.

8. A modular window unit comprising one or more of the following modules:

the fixing part module comprises a pressing line for fixing glass and a corresponding waterproof adhesive tape; and

the casement screen sash module comprises screen materials required by a casement screen sash, partition sealing profiles between the screen materials and the sash materials, waterproof rubber strips of the screen sash and hardware fittings required by the screen sash;

characterized in that the modular window unit further comprises a window frame module formed by a window frame according to any of claims 3-7.

9. The modular window unit of claim 8, wherein the screw secures the upper and lower slides with their longitudinal axis extending in a vertical direction.

10. A modular window unit according to claim 8 or 9, wherein the push-pull sash module further comprises a removable cover plate, the first slot adjacent the push-pull sash being covered by the removable cover plate when the push-pull sash is installed in the frame module.