CN212054440U

CN212054440U - Rollback screen window connecting piece and rollback screen window

Info

Publication number: CN212054440U
Application number: CN202020267559.1U
Authority: CN
Inventors: 汤军
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-03-06
Filing date: 2020-03-06
Publication date: 2020-12-01
Anticipated expiration: 2030-03-06

Abstract

The utility model relates to a building field especially relates to a rollback screen window connecting piece and rollback screen window, connecting piece (3) are used for strengthening the rollback screen window from the outside, the rollback screen window is including rolling up box (1) and groove of lying (2), connecting piece (3) include: a fixing part (32), wherein the fixing part (32) is used for being fixed on the lying slot (2); a positioning part for positioning the roll cassette (1); a main body portion (31), the main body portion (31) being for connecting the fixing portion (32) and the positioning portion. This application has been used for the connecting piece on the backrush screen window through structural design, and not only simple structure can play fine assistance-localization real-time and fixed function moreover, has greatly stabilized the structural relation between book box and the groove of lying for the backrush screen window needn't worry the deformation of structure in the use, has extremely strong practicality.

Description

Rollback screen window connecting piece and rollback screen window

Technical Field

The application relates to the field of buildings, in particular to a rollback screen window connecting piece and a rollback screen window.

Background

In the process of using the rollback screen window, the long-term pulling and rollback can cause the dislocation between the rolling box and the lying groove. The misalignment is not only aesthetically undesirable, but also risks contacting the ends of the lying channels with the screen, which contact can, on the one hand, significantly damage the shape and structure of the screen and, on the other hand, can be associated with a loud noise that is unacceptable to the user. In more serious cases, the connection structure of the roll box and the lying groove is deformed. Because the roll box is fixed with the lying groove through the inserting structures at the two ends, the roll box can deviate or even fall off due to the dislocation.

Especially as the form of screens is changing with the development of e-commerce, more and more people are self-installing after receiving goods, which is the result of this self-installation. Once the product lies the groove or lies the fixed problem between groove and the book box, all can lead to the structural stability of product to take place the problem, greatly influence the use of product.

Disclosure of Invention

The present application is directed to solving at least one of the problems in the prior art as described above.

To this end, the present application proposes a connection for externally reinforcing a rollback screen comprising a rolling box and a lying channel, the connection comprising:

the fixing part is used for being fixed on the lying groove;

the positioning part is used for positioning the roll box;

a main body portion for connecting the fixing portion and the positioning portion.

Furthermore, the fixing portion is a section of the main body portion extending towards the lying groove, and the fixing portion is fixed to the lying groove in at least one of bonding, bolt connection, insertion connection and hook groove connection.

Furthermore, the fixed part is provided with a step structure convenient for inserting and connecting the inserting position, and a barb structure convenient for hooking an open slot is arranged in the fixed part.

Further, the positioning part comprises a positioning plate perpendicular to the main body part, and the positioning part is used for positioning the rolling box from two sides.

Furthermore, the positioning portion comprises a top limiting plate, the top limiting plate is arranged on the upper portion of the main body portion, and the top limiting plate is used for limiting the rolling box.

Furthermore, one side of the top limiting plate facing the coil box is also provided with a limiting rib, and the limiting rib is used for being inserted into a limiting groove.

Furthermore, the connecting piece also comprises a mushroom head sliding buckle, the mushroom head sliding buckle is used for being matched with a preset L-shaped hole, and the mushroom head sliding buckle is used for fixing the connecting piece to the rollback screen window.

The rollback screen window comprises the connecting piece, the rollback screen window comprises a rolling box and a lying groove connected with the rolling box, the connecting piece is fixed to the lying groove through a fixing portion, and a main body portion of the connecting piece abuts against the back side of the rolling box.

Further, the fixed part is equipped with the stair structure of being convenient for insert the grafting position, be equipped with the barb structure of the hasp open slot of being convenient for in the fixed part, the groove of lying is equipped with the constant head tank that the cross section is "protruding" font breach, the constant head tank cooperation the fixed part, stair structure pegs graft the constant head tank, the groove of lying corresponds the position department of barb structure is equipped with the rectangular hole, barb structure cooperation the rectangular hole.

Furthermore, the end of the rolling box is also provided with a buckle cover, and the buckle cover is provided with a notch groove used for being embedded into the main body part.

Further, it still is equipped with the spacing groove to roll up box top, location portion includes the top limiting plate, the top limiting plate sets up the upper portion of main part, the top limiting plate is used for right it is spacing to roll up the box, the top limiting plate towards one side of rolling up the box still is equipped with spacing muscle, spacing muscle is used for the cooperation to insert the spacing groove.

Furthermore, the back of the rolling box is also provided with an L-shaped hole, the connecting piece further comprises a mushroom head sliding buckle, the mushroom head sliding buckle is used for being matched with the preset L-shaped hole, and the mushroom head sliding buckle is used for fixing the connecting piece to the rollback screen window.

Furthermore, the rollback screen window further comprises a plug connector, wherein the plug connector is plugged in the lying groove and is arranged between the lying groove and the rolling box; the plug connector comprises a main board and an outer baffle connected with the main board; the outer baffle is arranged outside the rolling box and is abutted against the rolling box.

Furthermore, the rollback screen window further comprises a plug connector and a screen mesh, wherein the plug connector is plugged in the lying groove, and the plug connector is arranged between the lying groove and the rolling box; the connector clip comprises a main board, and a chamfer is arranged on one side of the main board facing the gauze.

This application has been used for the connecting piece on the backrush screen window through structural design, and not only simple structure can play fine assistance-localization real-time and fixed function moreover, has greatly stabilized the structural relation between book box and the groove of lying for the backrush screen window needn't worry the deformation of structure in the use, has extremely strong practicality.

Drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective view of a first embodiment of the present application.

Fig. 2 is a partial exploded view of the first embodiment of the present application.

Fig. 3 is a first perspective view of a first connector according to a first embodiment of the present application.

Fig. 4 is a perspective view of a second connecting member according to the first embodiment of the present application.

Fig. 5 is a partial view of the second embodiment of the present application.

Fig. 6 is a perspective view of a connector according to a second embodiment of the present application.

Fig. 7 is a partial view of a third embodiment of the present application.

Fig. 8 is a perspective view of a connector according to a fourth embodiment of the present application.

Fig. 9 is a partial view one of the fourth embodiment of the present application.

Fig. 10 is a partial view ii of the fourth embodiment of the present application.

Fig. 11 is an exploded view showing the installation of the plug connector in the embodiment of the present application.

Fig. 12 is an exploded view of the installation of the plug connector in the embodiment of the present application.

Fig. 13 is a perspective view of the plug connector in the embodiment of the present application.

Reference numerals:

1. rolling the box; 11. a limiting groove; 12, buckling a cover; an L-shaped aperture; 14. inserting grooves; 15. a screen;

2. a lying groove; 21. positioning a groove; 22. a rectangular hole;

3. a connecting member; 31. a main body portion; 32. a fixed part; 321. a step structure; 322. a barb structure; 33. positioning a plate; 34. a top limiting plate; 341. limiting ribs; 35. the mushroom head is glided and buckled; 36. a plugboard;

5. a plug-in unit; 51. a main board; 52. chamfering; 53. a plug-in structure; 54. a first insertion groove; 55. a second insertion groove; 56. a vertical plate; 57. an outer baffle.

Detailed Description

Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present application and are not to be construed as limiting the present application.

A connector 3 for externally reinforcing a rollback screen comprising a roll box 1 and a chute 2, the connector 3 comprising:

a fixing portion 32, wherein the fixing portion 32 is used for being fixed on the lying slot 2;

a positioning portion for positioning the roll cassette 1;

a main body part 31, wherein the main body part 31 is used for connecting the fixing part 32 and the positioning part.

The fixing portion 32 is a section of the main body portion 31 extending toward the lying groove 2, and the fixing portion 32 is fixed to the lying groove 2 by at least one of bonding, bolting, plugging, and hooking.

The fixing portion 32 is provided with a step structure 321 convenient for inserting into the plugging position, and a barb structure 322 convenient for hooking an open slot is arranged in the fixing portion 32.

The positioning portion includes a positioning plate 33 perpendicular to the main body portion 31, and the positioning portion is used for positioning the roll cassette 1 from both sides.

The positioning part comprises a top limiting plate which is arranged on the upper part of the main body part 31 and used for limiting the coil box 1.

One side of the top limiting plate, which faces the coil box 1, is further provided with a limiting rib 341, and the limiting rib 341 is used for being inserted into the limiting groove 11.

The connecting piece 3 further comprises a mushroom head sliding buckle 35, the mushroom head sliding buckle 35 is used for being matched with the preset L-shaped hole 13, and the mushroom head sliding buckle 35 is used for fixing the connecting piece 3 to the rollback screen window.

A rollback screen window comprises any one of the connecting pieces 3, the rollback screen window comprises a rolling box 1 and a lying groove 2 connected with the rolling box 1, the connecting piece 3 is fixed on the lying groove 2 through a fixing part 32, and a main body part 31 of the connecting piece 3 is attached to the back side of the rolling box 1.

Fixed part 32 is equipped with the stair structure 321 that is convenient for insert the grafting position, be equipped with the barb structure 322 of the hasp open slot of being convenient for in the fixed part 32, it is equipped with the constant head tank 21 that the cross section is "protruding" font breach to lie groove 2, constant head tank 21 cooperates fixed part 32, stair structure 321 pegs graft constant head tank 21, it corresponds to lie groove 2 the position department of barb structure 322 is equipped with rectangular hole 22, barb structure 322 cooperates rectangular hole 22.

The end of the roll box 1 is further provided with a cover 12, and the cover 12 is provided with a notch groove for inserting the main body 31.

The top of the rolling box 1 is further provided with a limiting groove 11, the positioning portion comprises a top limiting plate, the top limiting plate is arranged on the upper portion of the main body portion 31, the top limiting plate is used for limiting the rolling box 1, the top limiting plate faces one side of the rolling box 1 and is further provided with a limiting rib 341, and the limiting rib 341 is used for being matched with and inserted into the limiting groove 11.

The back of the rolling box 1 is further provided with an L-shaped hole 13, the connecting piece 3 further comprises a mushroom head sliding buckle 35, the mushroom head sliding buckle 35 is used for being matched with the preset L-shaped hole 13, and the mushroom head sliding buckle 35 is used for fixing the connecting piece 3 to a rolling-back screen window.

The connecting piece 3 is used for reinforcing the rollback screen window from the outside, namely the connecting piece 3 is different from a structure that two ends of the rolling box 1 are inserted into the lying grooves 2, and the connecting piece 3 is a part specially used for reinforcing the rollback screen window.

The step structure 321 means that the thickness of the two sides of the fixing portion 32 is less than that of the middle portion, so that the fixing portion 32 can be inserted into a predetermined insertion position. This reduction in thickness can be either towards the side of the lying channel 2 or away from said lying channel 2, depending mainly on the cross-sectional design of the plugging location. The figures in this application show the reduced thickness of the side facing away from the lying channel 2. This has the advantage of increasing the contact area between the fixing portion 32 and the lying groove 2 as much as possible, and reducing the instability caused by machining errors.

All references to orientation in this application refer to the situation where the roll box 1 is on top after installation of the rollback screen. Of course, there may be a case where the cartridge 1 is on one side when it is mounted, and in this case, the above case is considered as a rotation of the above case with the side of the cartridge 1 as the upper side, and the description of the overall orientation is continued.

The back side of the roll cassette 1 refers to the side of the roll cassette 1 facing the surface to be mounted.

The first embodiment is as follows: from figure 1 it can be seen how the connector 3 referred to in itself cooperates with a rollback screen. The overall state of the present application after assembly can also be seen in fig. 1. The rollback screen window comprises a rolling box 1, a lying groove 2 connected with the rolling box 1 and a lower pulling strip connected with a screen in the rolling box 1. The lower brace slides up and down along a sliding groove preset in the lying groove 2. The rollback screen window further comprises the connecting piece 3, and the connecting piece 3 is arranged on the back of the rollback screen window. Namely, the connecting piece 3 is arranged at one side of the installation position of the back-rolling screen window in an abutting mode. Two ends of the rolling box 1 are provided with buckle covers 12.

In the present embodiment, the connecting member 3 includes a main body portion 31, a fixing portion 32, and a positioning portion. Wherein the main body 31 is connected to the fixing portion 32 and the positioning portion respectively. The structure of the connector 3 in the present application can be seen in fig. 2-4.

The fixing portion 32 is a plate extending from the main body 31, and the width of the fixing portion 32 matches with the positioning slot 21 at the back of the lying slot 2. The fixing portion 32 is inserted into the positioning groove 21, and a step structure 321 is further arranged at the position of the fixing portion 32, so that the fixing portion 32 is conveniently inserted into the positioning groove 21, and the whole thickness of the fixing portion 32 guarantees the connection strength between the fixing portion and the main body portion 31. Meanwhile, in the above arrangement, after the fixing portion 32 is inserted into the positioning groove 21, the surfaces of the fixing portion 32 and the positioning groove are substantially flush, so that the intervention of the fixing portion 32 does not affect the back flatness of the rollback screen window during installation.

The middle part of the fixing part 32 is also provided with a barb structure 322. The lying groove 2 is provided with a rectangular hole 22 at the position matching with the barb structure 322. During installation, the fixing portion 32 is inserted into the positioning groove 21, the barb structure 322 is deformed slightly, when the fixing portion 32 is inserted into the position of the rectangular hole 22, the barb structure 322 is embedded into the rectangular hole 22 under the action of elastic force, and the fixing portion 32 is prevented from being separated from the lying groove 2 by utilizing the abutting relation between the barb structure 322 and the rectangular hole 22.

The positioning portion includes a positioning plate 33 and a top position limiting plate. Locating plate 33 sets up the avris of connecting piece 3, locating plate 33 is used for the edgewise to carry out spacingly or fixed with rolling up box 1. Since the two connecting members 3 are generally provided, when the two positioning plates 33 work together, the two sides of the roll case 1 are limited or fixed. This is particularly important when the rollback screen is mounted laterally. The transverse installation means that the direction of the rollback screen is not vertically upwards, but towards the two sides of the window, compared with the ordinary installation.

The top limiting plate is a plate extending from the top of the main body 31 and having a certain elasticity or deformation capability. The top limiting plate is used for limiting the roll box 1 from the top of the roll box 1. In this embodiment, the top limiting plate can be regarded as a spring, which is disposed on the top of the main body 31 and has a certain elasticity. When installed, the cartridge 1 may be inserted into a limited area of the top restriction plate. In order to better limit the position of the rolling box 1 and ensure uniform stress, the area of the top limit plate, which is possibly contacted with the rolling box 1, is also designed into an arc-shaped plate matched with the outer contour of the rolling box 1. In order to enhance the limiting strength of the top limiting plate on the coil box 1, a limiting rib 341 is further arranged on one surface of the top limiting plate facing the coil box 1, and a limiting groove 11 matched with the limiting rib 341 is further arranged on the top of the coil box 1. The limiting rib 341 is shown in fig. 3, 4 and 6.

Example two: an embodiment of the present application is shown in fig. 5 and 6. Compared with the first embodiment, the embodiment of the present application directly replaces the positioning plate 33 with the fitting between the main body 31 and the buckle cover 12. In the present embodiment, the back of the cover 12 is provided with a notch for engaging with the main body 31. The notch is not shown, but it can be seen from fig. 5 that the main body 31 is substantially flush with the buckle cover 12 after the main body 31 is inserted into the buckle cover 12. The position for accommodating the main body 31 is the notch groove. Note that the notch groove for accommodating the main body portion 31 and the main body portion 31 abut against each other in the horizontal direction. This is to ensure that the body 31 can horizontally limit the position of the buckle cover 12.

The present embodiment is further different from the first embodiment in that the shape of the top stopper plate is changed. In the embodiment of the present application, the limiting rib 341 is directly used to cooperate with the limiting groove 11, and the roll box 1 is positioned.

Example three: an embodiment of the present application is shown in fig. 7. The difference between the embodiment of the present application and the second embodiment is that the structure of the top stopper of the first embodiment is adopted.

Example four: the embodiments of the present application are shown in fig. 8, 9, and 10. The difference between this embodiment and the third embodiment is that the positioning portion in this embodiment of the present application is not provided with a top limiting plate, but is replaced with a plug plate 36, and the corresponding roll cassette 1 is provided with a plug groove 14 for plugging the plug plate 36. In addition, this application still is equipped with mushroom head thread slipping 35 in order to guarantee firmly of location, corresponds it still has seted up L shape hole 13 to roll up box 1. Meanwhile, since the mushroom head slide fastener 35 is adopted in the present application, the requirement on whether the buckle cover 12 is matched with the main body 31 is not very strong, that is, the design of matching the main body 31 with the buckle cover 12 in the second embodiment and the third embodiment may be adopted, and the arrangement of the main body 31 in the first embodiment may also be adopted. It is conceivable that the design of the main body 31 in the embodiment of the present application may be in other forms.

The application also relates to a further accessory which can be applied to any of the embodiments described above. The accessory is applied to the rollback screen window, so that on one hand, when the rollback screen window is installed in a lying state, the rolling box cannot fall down; on the other hand, the utility model can also play the role of preventing scratching.

The specific scheme is as follows: the rollback screen window further comprises a plug connector 5, the plug connector 5 is plugged in the lying groove, and the plug connector 5 is arranged between the lying groove and the rolling box; the plug connector 5 comprises a main board 51 and an outer baffle 57 connected with the main board 51; the outer barrier 57 is disposed outside the roll cassette, the outer barrier 57 abutting against the roll cassette. The main plate 51 is provided with a chamfer 52 on the side facing the screen 15, and the chamfer 52 can prevent the screen 15 passing through the chamfer from being scratched. Generally, to ensure this effect, the main plate 51 has a smaller inner range relative to the lying groove. That is, the main plate 51 extends deeply into the region surrounded by the lying groove. It is conceivable that the chamfer 52 structure on the main plate 51 is provided on the upper surface of the main plate 51, as shown in fig. 13.

It can also be seen from the figure that the bottom of the plug 5 is further provided with a plug structure 53, this part of the plug structure 53 is used for better fitting of the plug 5 to the lying groove, in addition, the plug 5 is further provided with a riser 56, the riser 56 is inserted into the lying groove together with the plug structure 53, and the riser 56 is disposed below the outer baffle 57. Further, in order to match the chute structure, the bottom of the plug-in unit 5 is further provided with a first insertion slot 54, and the first insertion slot 54 is used for accommodating the edge of the chute. The plug connector 5 is further provided with a second inserting groove 55, the second inserting groove 55 is used for being matched with the fixing part of the connecting piece, and the second inserting groove 55 plays a role in avoiding the fixing part on one hand and also can play a role in assisting in positioning the fixing part on the other hand.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the structures or elements so referred to must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered as limiting. Furthermore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.

In the description herein, reference to the description of the terms "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims

1. A connection, characterized in that said connection (3) is used for externally reinforcing a rollback screen comprising a roll box (1) and a lying channel (2), said connection (3) comprising:

a fixing part (32), wherein the fixing part (32) is used for being fixed on the lying slot (2);

a positioning part for positioning the roll cassette (1);

a main body portion (31), the main body portion (31) being for connecting the fixing portion (32) and the positioning portion.

2. The connecting element according to claim 1, wherein the fixing portion (32) is a section of the main body portion (31) extending in the direction of the lying channel (2), and the fixing portion (32) is fixed to the lying channel (2) by at least one of an adhesive, a bolt, a plug, and a hook.

3. The connection according to claim 1, wherein the fixing portion (32) is provided with a step structure (321) for facilitating insertion into the plugging position, and the fixing portion (32) is provided with a barb structure (322) for facilitating hooking of the open groove.

4. A connecting piece according to any of claims 1-3, characterized in that the positioning part comprises a positioning plate (33) perpendicular to the main part (31) for positioning the roll cassette (1) from both sides.

5. The connector according to any one of claims 1 to 3, wherein the positioning portion comprises a top stopper plate (34), the top stopper plate (34) is disposed at an upper portion of the main body portion (31), and the top stopper plate (34) is used for stopping the roll case (1).

6. The connecting piece according to any one of claims 1 to 3, wherein the positioning portion comprises a top limiting plate (34), a limiting rib (341) is further arranged on one side of the top limiting plate (34) facing the roll box (1), and the limiting rib (341) is used for being inserted into the limiting groove (11).

7. A connector according to any of claims 1 to 3, wherein the connector (3) further comprises a mushroom head slider (35), the mushroom head slider (35) being adapted to engage a predetermined L-shaped aperture (13), the mushroom head slider (35) being adapted to secure the connector (3) to a rollback screen.

8. A rollback screen, characterised in that it comprises a connection element (3) according to any one of claims 1-7, said rollback screen comprising a roll-up box (1) and a lying channel (2) connected to the roll-up box (1), said connection element (3) being fixed to said lying channel (2) by a fixing portion (32), said connection element (3) having a main body portion (31) which abuts against a back side of said roll-up box (1).

9. The rollback screen window according to claim 8, wherein the fixing portion (32) is provided with a step structure (321) for facilitating insertion into a plugging position, a barb structure (322) for facilitating hooking an open slot is arranged in the fixing portion (32), the lying slot (2) is provided with a positioning slot (21) having a cross section with a notch shaped like a Chinese character 'tu', the positioning slot (21) is matched with the fixing portion (32), the step structure (321) is plugged into the positioning slot (21), a rectangular hole (22) is arranged at a position of the lying slot (2) corresponding to the barb structure (322), and the barb structure (322) is matched with the rectangular hole (22).

10. The rollback screen of claim 8, wherein the end of the roll box (1) is further provided with a cover (12), and the cover (12) is provided with a gap slot for inserting the main body (31).

11. The rollback screen window according to claim 8, wherein a limiting groove (11) is further formed in the top of the roll box (1), the positioning portion comprises a top limiting plate (34), the top limiting plate (34) is arranged on the upper portion of the main body portion (31), the top limiting plate (34) is used for limiting the roll box (1), a limiting rib (341) is further arranged on one side, facing the roll box (1), of the top limiting plate (34), and the limiting rib (341) is used for being inserted into the limiting groove (11) in a matching mode.

12. The rollback screen of claim 8, wherein the back of the roll box (1) is further provided with an L-shaped hole (13), the connecting member (3) further comprises a mushroom head slider (35), the mushroom head slider (35) is used for matching with the preset L-shaped hole (13), and the mushroom head slider (35) is used for fixing the connecting member (3) to the rollback screen.

13. The rollback screen of claim 8, further comprising a plug (5), wherein the plug (5) is plugged on the lying slot (2), and wherein the plug (5) is disposed between the lying slot (2) and the rolling box (1); the plug connector (5) comprises a main board (51) and an outer baffle (57) connected with the main board (51); the outer baffle (57) is arranged outside the rolling box (1), and the outer baffle (57) is abutted to the rolling box (1).

14. The rollback screen according to claim 8, further comprising a plug (5) and a screen (15), wherein the plug (5) is plugged on the lying slot (2), and the plug (5) is disposed between the lying slot (2) and the rolling box (1); the plug connector (5) comprises a main board (51), and a chamfer (52) is arranged on one side of the main board (51) facing the gauze (15).