CN110500016B

CN110500016B - Waterproof structure of door and window

Info

Publication number: CN110500016B
Application number: CN201910783614.4A
Authority: CN
Inventors: 曹孝洪; 朱启勇; 马良凤; 阙道均
Original assignee: Sichuan Jinqiu New Building Materials Co ltd
Current assignee: Sichuan Jinqiu New Building Materials Co ltd
Priority date: 2019-08-23
Filing date: 2019-08-23
Publication date: 2020-06-23
Anticipated expiration: 2039-08-23
Also published as: CN110500016A

Abstract

The invention relates to a door and window waterproof structure, which comprises a mounting frame, wherein a containing groove is arranged in the mounting frame, a window sash is contained and connected in the containing groove in a sliding manner, the containing groove comprises an upper containing groove and a lower containing groove, a dead slot with an opening at the upper end is arranged on the side wall of the lower containing groove close to the outdoor along the length direction of the side wall, the dead slot is provided with a drain hole communicated with the outside, a rain baffle plate used for abutting against the window sash is arranged in the dead slot in a penetrating manner, a resisting block penetrating through the mounting frame and abutting against the window sash is connected in the mounting frame in a sliding manner along the sliding direction of the window sash, a sliding rod is arranged in the dead slot in a penetrating manner and connected in a sliding manner along the length direction of the dead slot, the sliding rod is fixedly. The invention has the effect of reducing the rainwater infiltration into the room through the installation gap.

Description

Waterproof structure of door and window

Technical Field

The invention relates to the technical field of door and window water prevention, in particular to a door and window water prevention structure.

Background

The doors and windows are important components of building modeling, the shapes, sizes, proportions, arrangements, colors, modeling and the like of the doors and windows have great influence on the overall modeling of the building, and the building outer doors and windows face outdoors and face indoor structures.

The existing gap waterproof structure for the external door and window of the building generally discharges rainwater through a drain hole in a bottom frame, but the external door and window of the building has a mounting gap, the design and the mounting of a door and window frame are not reasonable enough, and the gap is easy to seep water and enter the room when raining, so that the indoor environment is influenced.

Disclosure of Invention

The invention aims to provide a door and window waterproof structure which has the advantage of reducing the infiltration of rainwater into a room through an installation gap.

The above object of the present invention is achieved by the following technical solutions:

a door and window waterproof structure comprises a mounting frame, wherein a containing groove is arranged in the mounting frame, a window sash is contained and connected in the containing groove in a sliding manner, the containing groove comprises an upper containing groove and a lower containing groove, the lower containing groove is provided with a dead slot with an opening at the upper end along the length direction close to the outdoor side wall, the dead slot is provided with a drain hole communicated with the outside, a rain baffle plate used for abutting against the window sash is arranged in the dead slot in a penetrating manner, a resisting block penetrating out of the mounting frame and abutting against the window sash is connected in the mounting frame in a sliding manner along the sliding direction of the window sash, a sliding rod is arranged in the dead slot in a penetrating manner along the length direction of the dead slot and is connected in a sliding manner, the sliding rod is fixedly connected with a resisting block, an inclined rod is arranged between the resisting block and the rain baffle plate, the inclined rod is respectively connected with the resisting block and the rain baffle plate in, the abutting block drives the rain baffle to ascend through the inclined rod and abut against the window sash, so that rainwater flows towards the drain hole.

When the technical scheme is implemented, the window sash is closed in rainy weather, in the process, the window sash is abutted with the abutting block, the abutting block moves towards the inside of the installation frame under the abutting action of the window sash, so that the abutting block drives the sliding rod to move together with the sliding rod, the sliding rod sliding along the length direction of the hollow groove is connected with the inclined rod in a rotating manner, the rain baffle plate also connected with the inclined rod in a rotating manner is driven to move towards the opening direction of the hollow groove under the limiting action of the vertical two sides of the hollow groove, the rain baffle plate penetrates out of the hollow groove and then abuts against the window sash, so that the gap between the window sash and the accommodating groove is reduced, meanwhile, rainwater is guided to the drain hole in the hollow groove, so that the rainwater is drained through the drain hole, and the advantage of reducing the rainwater from penetrating into a room through the installation gap is; when the window sash is opened, the window sash is not abutted to the abutting block, and the rain baffle can automatically reset into the empty groove under the action of gravity, so that the influence of the rain baffle on the sliding of the window sash is reduced.

The window sash further comprises an outer window sash and an inner window sash, the rain baffle comprises a first rain baffle abutted against the outer window sash and a second rain baffle abutted against the inner window sash, the abutting block comprises a first abutting block abutted against the outer window sash and a second abutting block abutted against the inner window sash, the sliding rod comprises a first sliding rod connected with the first abutting block and a second sliding rod connected with the second abutting block, the inclined rod comprises a first inclined rod and a second inclined rod, the first inclined rod is respectively and rotatably connected with the first abutting block and the first rain baffle, and the second inclined rod is respectively and rotatably connected with the second abutting block and the second rain baffle.

According to the technical scheme, as the window sash of a common sliding window comprises the inner window sash and the outer window sash, the distance between the inner window sash and the outer window sash and the distance between the inner window sash and the outer side wall, close to the outdoor, of the lower accommodating groove are different, when the outer window sash is closed, the outer window sash is abutted to the first abutting block, the first abutting block moves towards the inside of the mounting frame under the abutting action of the outer window sash, so that the first abutting block drives the first sliding rod to move together with the first sliding rod, the first sliding rod sliding along the length direction of the hollow groove is rotationally connected with the first inclined rod, the first rain baffle which is also rotationally connected with the first inclined rod is driven to move towards the opening direction of the hollow groove, the first rain baffle penetrates through the hollow groove and then abuts against the outer window sash, and therefore the gap between the outer window; in a similar way, when closing interior casement, interior casement and second support piece looks butt, the second supports the piece including under the effect of casement butt move towards the installing frame internal motion, thereby make the second support the piece and drive the second slide bar rather than the concerted movement, along the gliding second slide bar of dead slot length direction through be connected with the rotation of second down tube, drive the same second weather shield of being connected with the second down tube rotation and move towards the opening direction of dead slot, and make second weather shield wear out behind the dead slot with interior casement looks butt, thereby reduce the gap between interior casement and the holding tank.

The invention is further arranged in that a partition plate for separating the first rain baffle and the second rain baffle is arranged in the empty groove and is respectively used for moving towards the opening direction of the empty groove when the first rain baffle and the second rain baffle are abutted against the partition plate.

Implement above-mentioned technical scheme, through being provided with the division board, separate first weather shield and second weather shield for the process of first weather shield and outer casement butt and the process of second weather shield and interior window fan butt do not influence each other.

The invention is further provided that a first connecting plate is arranged between the first rain baffle and the first inclined rod, one end of the first inclined rod far away from the first sliding rod is rotatably connected with the lower end of the first connecting plate and is used for lifting the first rain baffle along the vertical direction of the partition plate, one end of the first rain baffle far away from the outer sash is rotatably connected with the upper end of the first connecting plate and is used for rotating the first rain baffle towards the outer sash after penetrating out of the opening, a second connecting plate is arranged between the second rain baffle and the second inclined rod, one end of the second inclined rod far away from the second sliding rod is rotatably connected with the lower end of the second connecting plate and is used for lifting the second rain baffle along the vertical direction of the partition plate, and one end of the second rain baffle far away from the inner sash is rotatably connected with the upper end of the second connecting plate, and the second rain baffle penetrates out of the opening and then rotates towards the inner window sash.

According to the technical scheme, the first connecting plate is arranged, the first inclined rod is rotatably connected with the lower end of the first connecting plate, so that the first rain baffle can lift along the vertical direction of the partition plate under the abutting action of the first inclined rod, the first rain baffle is rotatably connected with the upper end of the first connecting plate, and after the first rain baffle penetrates out of the empty groove, the first rain baffle can rotate towards the outer window sash so that the first rain baffle is abutted to the outer window sash; similarly, through being provided with the second connecting plate, the second down tube rotates with the lower extreme of second connecting plate to be connected for second weather shield can go up and down along the vertical direction of division board under the butt effect of second down tube, and second weather shield rotates with the upper end of second connecting plate to be connected, and after the dead slot was worn out to second weather shield, can rotate towards interior window fan, makes second weather shield and interior window fan looks butt.

The invention is further provided that one end of the first rain baffle, which is used for being abutted against the outer sash, is provided with a first sealing strip, and one end of the second rain baffle, which is used for being abutted against the inner sash, is provided with a second sealing strip.

By implementing the technical scheme, the first sealing strip is arranged, so that when the first rain baffle is abutted with the outer window sash, the gap between the first rain baffle and the outer window sash is reduced, and rainwater infiltration is reduced; through being provided with the second sealing strip for when second weather shield and interior window fan looks butt, reduce the space between second weather shield and the interior window fan, reduce rainwater infiltration.

The invention is further provided that the first sealing strip is detachably connected with the first rain baffle, and the second sealing strip is detachably connected with the second rain baffle.

By implementing the technical scheme, the first sealing strip is detachably connected with the first rain baffle, so that the first sealing strip and the first rain baffle can be conveniently installed and detached; the second sealing strip and the second rain baffle are detachably connected, so that the second sealing strip and the second rain baffle can be conveniently installed and detached.

The invention is further provided that a first reset piece used for enabling the first abutting block to move towards the outside of the installation frame is arranged in the installation frame, and a second reset piece used for enabling the second abutting block to move towards the outside of the installation frame is arranged in the installation frame.

When the outer window sash is opened and is not abutted against the first abutting block and the first rain shielding plate is not automatically reset into the empty groove under the action of gravity, the first abutting block moves towards the outside of the mounting frame under the action of no abutting of the outer window sash through the arrangement of the first resetting piece, so that the first rain shielding plate falls back into the empty groove, and the influence on the sliding of the outer window sash is reduced; interior casement is opened, and with the second support piece looks butt, when the second weather shield does not automatic re-setting to the dead slot under the action of gravity in, through being provided with the second piece that resets for the second supports the piece and moves towards the installing frame ectogenesis under the effect that does not have interior casement butt, thereby makes the second weather shield fall back to the dead slot in, reduces the influence when sliding to the interior casement.

The invention is further arranged that the first and second return members are both springs.

Implement above-mentioned technical scheme, through with first piece and the second piece that resets all set up to the spring for first piece that resets is under the condition that does not have the outer casement butt, supports out first piece of supporting smoothly, makes the second piece that resets simultaneously support out the piece smoothly with the second under the condition that does not have the interior casement butt.

In conclusion, the invention has the following beneficial effects:

when the window is rainy, the window sash is closed, in the process, the window sash is abutted with the abutting block, the abutting block moves towards the inside of the installation frame under the abutting action of the window sash, so that the abutting block drives the sliding rod to move together with the sliding rod, the sliding rod sliding along the length direction of the hollow groove is connected with the inclined rod in a rotating mode, the rain baffle plate which is also connected with the inclined rod in a rotating mode is driven to move towards the opening direction of the hollow groove under the limiting action of the two vertical sides of the hollow groove, the rain baffle plate penetrates out of the hollow groove and then abuts against the window sash, so that the gap between the window sash and the accommodating groove is reduced, meanwhile, rainwater is guided to the drainage hole in the hollow groove, and is drained out through the drainage hole, and the window sash has the advantage of reducing the rainwater from penetrating into a room through the;

the first connecting plate is arranged, the first inclined rod is rotatably connected with the lower end of the first connecting plate, so that the first rain baffle can lift along the vertical direction of the partition plate under the abutting action of the first inclined rod, the first rain baffle is rotatably connected with the upper end of the first connecting plate, and after penetrating out of the empty groove, the first rain baffle can rotate towards the outer window sash so that the first rain baffle is abutted with the outer window sash; similarly, through being provided with the second connecting plate, the second down tube rotates with the lower extreme of second connecting plate to be connected for second weather shield can go up and down along the vertical direction of division board under the butt effect of second down tube, and second weather shield rotates with the upper end of second connecting plate to be connected, and after the dead slot was worn out to second weather shield, can rotate towards interior window fan, makes second weather shield and interior window fan looks butt.

Drawings

FIG. 1 is a schematic view of the overall structure of a waterproof structure for doors and windows according to an embodiment of the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1;

FIG. 3 is a partial sectional view of a waterproof structure for doors and windows according to an embodiment of the present invention;

FIG. 4 is an enlarged view of portion B of FIG. 3;

fig. 5 is an enlarged view of a portion C in fig. 3.

Reference numerals: 1. installing a frame; 2. accommodating grooves; 21. an upper accommodating groove; 22. a lower accommodating groove; 3. a window sash; 31. an outer sash; 32. an inner sash; 4. an opening; 5. an empty groove; 6. a drain hole; 7. a rain shield; 71. a first rain shield; 72. a second rain guard; 8. a resisting block; 81. a first resisting block; 82. a second resisting block; 9. a slide bar; 91. a first slide bar; 92. a second slide bar; 10. a diagonal bar; 101. a first diagonal member; 102. a second diagonal member; 11. a partition plate; 12. a first connecting plate; 13. a second connecting plate; 14. a first seal strip; 15. a second seal strip; 16. a first reset member; 17. a second reset member.

Detailed Description

The technical solutions of the embodiments of the present invention will be described below with reference to the accompanying drawings.

Examples

As shown in figure 1, a door and window waterproof structure comprises a mounting frame 1, wherein an accommodating groove 2 is formed in the mounting frame 1, and a window sash 3 is accommodated in the accommodating groove 2 and connected with the window sash in a sliding mode. The accommodating groove 2 comprises an upper accommodating groove 21 and a lower accommodating groove 22, the window sash 3 comprises an outer window sash 31 and an inner window sash 32, and sliding rails for the inner window sash and the outer window sash 31 are arranged in the upper accommodating groove 21 and the lower accommodating groove 22 in parallel.

Referring to fig. 1 and 2, the lower receiving groove 22 has an empty groove 5 with an upper opening 4 along the length direction of the side wall close to the outdoor, and five drain holes 6 communicating with the outside along the length direction of the empty groove 5. The hollow groove 5 is provided with a rain baffle 7 in the inner part thereof for abutting against the window sash 3, and the rain baffle 7 includes a first rain baffle 71 for abutting against the outer window sash 31 and a second rain baffle 72 for abutting against the inner window sash 32. A partition plate 11 is provided in the empty tank 5 to divide the empty tank 5 into two. The first rain blocking plate 71 for abutting against the outer sash 31 is inserted and slidably connected to the left half of the empty groove 5 partitioned by the partition plate 11, and the second rain blocking plate 72 for abutting against the inner sash 32 is inserted and slidably connected to the right half of the empty groove 5 partitioned by the partition plate 11. The first rain baffle 71 is used for being connected with the first sealing strip 14 in a clamped mode at one end abutted against the outer window sash 31, the second rain baffle 72 is used for being connected with the second sealing strip 15 in a clamped mode at one end abutted against the inner window sash 32, and in the embodiment, the first sealing strip 14 and the second sealing strip 15 are made of sponge.

With reference to fig. 3 and 4, a supporting block 8 penetrating through the mounting frame 1 and abutting against the window sash 3 is slidably connected in the mounting frame 1 along the sliding direction of the window sash 3, and the supporting block 8 includes a first supporting block 81 for abutting against the outer window sash 31 and a second supporting block 82 for abutting against the inner window sash 32. The empty slot 5 is penetrated and slidably connected with a slide bar 9 along the length direction thereof, the slide bar 9 is fixedly connected with the abutting block 8, and the slide bar 9 comprises a first slide bar 91 connected with the first abutting block 81 and a second slide bar 92 connected with the second abutting block 82. An inclined rod 10 is arranged between the resisting block 8 and the rain baffle 7, and the inclined rod 10 comprises a first inclined rod 101 and a second inclined rod 102 (see fig. 5).

Referring to fig. 3 and 4, when the outer window sash 31 is closed, the first abutting block 81 abuts against the outer window sash 31 and is located in the installation frame 1, and the first abutting block 81 is welded to the first sliding rod 91 through a connecting rod. A first connecting plate 12 is arranged between the first rain baffle 71 and the first diagonal rod 101, one end of the first diagonal rod 101, which is far away from the first sliding rod 91, is hinged to the lower end of the first connecting plate 12, so that the first rain baffle 71 can lift along the vertical direction of the partition plate 11, one end of the first rain baffle 71, which is far away from the outer sash 31, is hinged to the upper end of the first connecting plate 12, and the first rain baffle 71 can rotate towards the outer sash 31 after penetrating out of the empty slot 5. A first reset piece 16 for moving the first abutting block 81 toward the outside of the mounting frame 1 is arranged in the mounting frame 1, and in this embodiment, the first reset piece 16 is a spring.

Referring to fig. 3 and 5, when the inner window sash 32 is closed, the second abutting block 82 abuts against the inner window sash 32 and is located in the mounting frame 1, and the second abutting block 82 is welded to the second slide bar 92 through a connecting rod. A second connecting plate 13 is arranged between the second rain baffle 72 and the second diagonal rod 102, two ends of the second diagonal rod 102, which are far away from the second sliding rod 92, are hinged to the lower end of the second connecting plate 13 for the second rain baffle 72 to lift along the vertical direction of the partition plate 11, two ends of the second rain baffle 72, which are far away from the inner window sash 32, are hinged to the upper end of the second connecting plate 13 for the second rain baffle 72 to rotate towards the inner window sash 32 after penetrating through the empty slot 5. The mounting frame 1 is provided with a second reset piece 17 for the second abutting block 82 to move towards the inside of the mounting frame 1, and in this embodiment, the second reset piece 17 is a spring.

The specific working process is as follows: when it is raining, the outer sash 31 and the inner sash 32 need to be closed, respectively. When the outer window sash 31 is pushed and pulled to be closed, the outer window sash 31 is abutted against the first abutting block 81, the first abutting block 81 moves towards the inside of the mounting frame 1 under the abutting action of the outer window sash 31, so that the first abutting block 81 drives the first sliding rod 91 to move together with the first sliding rod 91, the first sliding rod 91 sliding along the length direction of the empty slot 5 drives the first rain shielding plate 71 rotatably connected with the first inclined rod 101 through the first connecting plate 12 to move towards the opening 4 direction of the empty slot 5 through the rotating connection of the first inclined rod 101 and the first connecting plate 12, when the first rain shielding plate 71 penetrates out of the empty slot 5, the first rain shielding plate 71 rotates towards the outer window sash 31 through the rotating connection of the first connecting plate 12, so that the first sealing strip 14 made of the first rain shielding plate 71 by a sponge water drainage hole is abutted against the outer window sash 31, so as to reduce the gap between the outer window sash 31 and the accommodating groove 2, and enable rainwater to flow towards the 6 in the empty slot 5 along the first rain shielding plate, thereby allowing rainwater to be discharged through the drain hole 6.

When the inner window sash 32 is pushed and pulled to be closed, the inner window sash 32 abuts against the second abutting block 82, the second abutting block 82 moves towards the inside of the mounting frame 1 under the abutting action of the inner window sash 32, so that the second abutting block 82 drives the second slide rod 92 to move together with the second slide rod 92, the second slide rod 92 sliding along the length direction of the empty slot 5 drives the second rain baffle 72 rotatably connected with the second inclined rod 102 through the second connecting plate 13 to move towards the opening 4 direction of the empty slot 5 through the rotating connection of the second rain baffle 72 and the second connecting plate 13, after the second rain baffle 72 penetrates out of the empty slot 5, the second rain baffle 72 rotates towards the inner window sash 32 through the rotating connection of the second rain baffle 72 and the second connecting plate 13, so that the second sealing strip 15 made of sponge abuts against the inner window sash 32, so that the gap between the inner window sash 32 and the accommodating groove 2 is reduced, and rainwater can flow towards the drain hole 6 in the empty slot 5 along the second rain baffle 72, thereby allowing rainwater to be discharged through the drain hole 6.

When the outer window sash 31 needs to be pushed and pulled to be opened, the outer window sash 31 is not abutted to the first abutting block 81, and the first abutting block 81 moves outwards towards the mounting frame 1 under the action of the first resetting piece 16 which is a spring, so that the first rain baffle 71 is reset into the empty groove 5, and the first rain baffle 71 does not influence the sliding of the outer window sash 31; when the inner sash 32 needs to be pushed and pulled to be opened, the inner sash 32 is not abutted to the second abutting block 82, and the second abutting block 82 moves outwards towards the mounting frame 1 under the action of the second resetting piece 17 which is a spring, so that the second rain blocking plate 72 is reset to the empty groove 5, and the second rain blocking plate 72 does not influence the sliding of the inner sash 32.

The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.

Claims

1. A door and window waterproof structure comprises a mounting frame (1), wherein a containing groove (2) is arranged in the mounting frame (1), a window sash (3) is contained and connected in the containing groove (2) in a sliding manner, and the door and window waterproof structure is characterized in that the containing groove (2) comprises an upper containing groove (21) and a lower containing groove (22), the lower containing groove (22) is close to an outdoor side wall and is provided with a hollow groove (5) with an upper end opening (4) along the length direction of the side wall, the hollow groove (5) is provided with a drain hole (6) communicated with the outside, the hollow groove (5) is internally provided with a rain baffle (7) in a penetrating manner for abutting against the window sash (3), the mounting frame (1) is internally provided with a abutting block (8) which penetrates out of the mounting frame (1) and abuts against the window sash (3), and the hollow groove (5) is provided with a sliding rod (9) in a penetrating manner and connected in a sliding manner, the sliding rod (9) is fixedly connected with the abutting block (8), an inclined rod (10) is arranged between the sliding rod (9) and the rain baffle (7), the inclined rod (10) is respectively connected with the sliding rod (9) and the rain baffle (7) in a rotating mode, when the window sash (3) pushes the abutting block (8) to move towards the accommodating groove (2), the abutting block (8) drives the rain baffle (7) to ascend through the inclined rod (10) and abuts against the window sash (3), and therefore rainwater flows towards the drain hole (6).

2. A door and window flashing structure according to claim 1, wherein the sash (3) comprises an outer sash (31) and an inner sash (32), the flashing (7) comprises a first flashing (71) for abutment with the outer sash (31) and a second flashing (72) for abutment with the inner sash (32), the abutment block (8) comprises a first abutment block (81) for abutment with the outer sash (31) and a second abutment block (82) for abutment with the inner sash (32), the slide bar (9) comprises a first slide bar (91) connected to the first abutment block (81) and a second slide bar (92) connected to the second abutment block (82), the tilt bar (10) comprises a first tilt bar (101) and a second tilt bar (102), the first tilt bar (101) being rotatably connected to the first slide bar (91) and the first flashing (71), respectively, the second diagonal rod (102) is respectively connected with the second sliding rod (92) and the second rain baffle (72) in a rotating mode.

3. A door and window flashing structure as claimed in claim 2, wherein a partition plate (11) separating the first flashing (71) and the second flashing (72) is arranged in the recess (5) for movement towards the opening (4) of the recess (5) when the first flashing (71) and the second flashing (72) abut against the partition plate (11), respectively.

4. A door and window waterproof structure according to claim 3, characterized in that a first connecting plate (12) is arranged between the first rain baffle (71) and the first inclined rod (101), one end of the first inclined rod (101) far away from the first sliding rod (91) is rotatably connected with the lower end of the first connecting plate (12) for the first rain baffle (71) to lift along the vertical direction of the partition plate (11), one end of the first rain baffle (71) far away from the outer sash (31) is rotatably connected with the upper end of the first connecting plate (12) for the first rain baffle (71) to rotate towards the outer sash (31) after penetrating out of the opening (4), a second connecting plate (13) is arranged between the second rain baffle (72) and the second inclined rod (102), one end of the second inclined rod (102) far away from the second sliding rod (92) is rotatably connected with the lower end of the second connecting plate (13), the second rain baffle (72) is used for lifting along the vertical direction of the partition plate (11), one end, far away from the inner window sash (32), of the second rain baffle (72) is rotatably connected with the upper end of the second connecting plate (13), and the second rain baffle (72) penetrates through the opening (4) and then rotates towards the inner window sash (32).

5. A door and window flashing structure as claimed in claim 2, wherein the end of the first flashing (71) intended to abut against the outer sash (31) is provided with a first bead (14), and the end of the second flashing (72) intended to abut against the inner sash (32) is provided with a second bead (15).

6. A door and window flashing structure as claimed in claim 5, in which the first sealing strip (14) is detachably connected to the first flashing (71) and the second sealing strip (15) is detachably connected to the second flashing (72).

7. The door and window waterproof structure of claim 2, wherein a first reset piece (16) for the first abutting block (81) to move towards the outside of the mounting frame (1) is arranged in the mounting frame (1), and a second reset piece (17) for the second abutting block (82) to move towards the outside of the mounting frame (1) is arranged in the mounting frame (1).

8. A structure as claimed in claim 7, characterized in that said first return member (16) and said second return member (17) are both springs.