Outward side-hung hinge for window

Abstract

The outward side-hung hinge for the window comprises an opening and closing assembly, a sliding assembly and a limiting assembly, the opening and closing assembly comprises a bottom plate, a supporting arm, a first connecting arm and a second connecting arm, the bottom plate is fixed to a window frame, and the supporting arm is fixed to a window sash; the sliding assembly comprises a sliding block and a third connecting arm. One end of the third connecting arm is rotationally connected with the sliding block, and the other end of the third connecting arm is rotationally connected with the supporting arm; the limiting assembly comprises a limiting block fixed to the middle of the bottom plate, the two ends of the first connecting arm are rotationally connected with the bottom plate and the supporting arm respectively, and the two ends of the second connecting arm are rotationally connected with the bottom plate and the sliding assembly respectively. And the first connecting arm and the second connecting arm are respectively positioned on two sides of the limiting block on the bottom plate and are limited by the limiting block. According to the external side-hung hinge for the window, the structure is optimized and designed, and the reliability and good wind resistance of a product are ensured through a multi-point limiting wind resistance structure.

Description

Technical Field

[0001] This application relates to the field of building door and window hardware technology, and in particular to an outward-opening hinge for windows. Background Technology

[0002] Outward-opening casement hinges, as a type of door and window hardware, are commonly used on outward-opening window profiles to support the weight of the window sash and allow the window sash to open to a certain angle. Currently, most outward-opening casement hinges on the market lack wind-resistant design or have weak wind-resistant performance. As a result, in actual use, the hinge may be blown by the wind to a position greater than the maximum opening limit, causing the window sash to deform or even fall off, resulting in economic losses and major accidents. Utility Model Content

[0003] To at least partially solve the above problems, this application has optimized and designed the outward-opening hinge for windows, and ensured the reliability and good wind resistance of the product through a multi-point limiting wind-resistant structure.

[0004] This utility model is achieved through the following technical solution:

[0005] An outward-opening hinge for a window includes an opening and closing component, a sliding component, and a limiting component.

[0006] The opening and closing assembly includes a base plate, a support arm, a first connecting arm, and a second connecting arm. The base plate is fixed to the window frame, and the support arm is fixed to the window sash.

[0007] The sliding assembly includes a slider and a third connecting arm; the slider is disposed on the base plate and slidably connected to the base plate, and one end of the third connecting arm is rotatably connected to the slider and the other end is rotatably connected to the support arm.

[0008] The limiting component includes a limiting block, which is fixed to the middle of the base plate. The two ends of the first connecting arm are rotatably connected to the base plate and the support arm, respectively. The two ends of the second connecting arm are rotatably connected to the base plate and the sliding component, respectively. The first connecting arm and the second connecting arm are located on both sides of the limiting block on the base plate and are limited by the limiting block.

[0009] In one alternative embodiment, the opening and closing assembly includes a corner bracket fixed to one end of the base plate, the corner bracket being perpendicular to the base plate.

[0010] In one optional embodiment, the opening and closing assembly includes a positioning piece fixed to one end of the support arm, the positioning piece being arranged parallel to the support arm and extending out of the end of the support arm; the first connecting arm is rotatably connected to the support arm and the positioning piece in sequence.

[0011] In one optional embodiment, the sliding assembly includes a liner, a slider rivet, and a bolt. A groove is formed on the base plate, the slider is sleeved on the base plate and slides along the groove, the liner is placed below the groove, the slider has a through hole and a screw hole, the bolt passes through the through hole, the screw hole, the groove, and the liner in sequence and is fixed by a nut, and the slider rivet passes through the end of the third connecting arm and the through hole of the slider in sequence to rivet the third connecting arm and the slider so that the third connecting arm is rotatably connected to the slider.

[0012] In one optional embodiment, the limiting block is butterfly-shaped with concave limiting portions on both sides. The ends of the first connecting arm and the second connecting arm are arc-shaped and disposed in the concave limiting portions. The arc edges of the first connecting arm and the second connecting arm form a transition angle with the edges on both sides. The transition angle is the limit position when the concave limiting portion rotates and when the straight edge coincides with one side of the concave limiting portion.

[0013] In an optional embodiment, the limiting component further includes a gasket, which is clamped and fixed between the limiting block, the first connecting arm, the second connecting arm and the base plate, and a U-shaped notch is provided on one side of the gasket.

[0014] In an optional embodiment, the limiting component further includes a limiting post, which is fixed to the support arm and disposed near the third connecting arm. When the hinge is opened to the maximum opening angle, the limiting post contacts the third connecting arm to restrict its movement.

[0015] In an optional embodiment, the hinge further includes a fixing component, which includes a limiting block clip assembly and at least one base plate clip assembly. The base plate clip assembly fixes the base plate to the window frame, and the limiting block clip assembly sequentially fixes the limiting block, the gasket, and the base plate to the window frame.

[0016] In one optional embodiment, the end of the support arm is provided with a fixing part perpendicular to the support arm, and a support arm clamp assembly is provided to fix the support arm to the side of the window sash.

[0017] In one optional embodiment, the support arm is rotatably connected to the first connecting arm by a second rivet, and the first connecting arm and the second connecting arm are rotatably connected to the base plate by a first rivet and a third rivet, respectively; the third connecting arm is rotatably connected to the second connecting arm and the support arm by a fourth rivet and a fifth rivet, respectively.

[0018] The technical solution of this application uses a limiting block installed between two connecting arms for limiting, and together with the limiting post on the support arm and the rivet structure in the slider, adopts a multi-point limiting method to form a limiting structure, so as to achieve good wind resistance and improve the reliability and stability of the product. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0020] Figure 1 This is an exploded view of the structure of Embodiment 1 of this utility model;

[0021] Figure 2 This is a schematic diagram of the open state of Embodiment 1 of this utility model;

[0022] Figure 3 This is a schematic diagram of the closed state in Embodiment 1 of this utility model;

[0023] Figure 4 This is a schematic diagram of the maximum opening angle state of Embodiment 1 of this utility model;

[0024] Figure 5 This is a schematic diagram of the rear view at the maximum opening angle of Embodiment 1 of this utility model;

[0025] Figure 6 This is an exploded view of the structure of Embodiment 2 of this utility model;

[0026] 1-Base plate, 11-Slider, 111-Slider rivet, 12-First base plate clamping piece, 121-First base plate clamping piece rivet, 13-Second base plate clamping piece, 131-Second base plate clamping piece rivet, 14-Corner wrap, 15-Connecting hole;

[0027] 2-Gasket;

[0028] 3-Limit block;

[0029] 4-Limit block clamping piece, 41-Limit block clamping piece rivet;

[0030] 5-First connecting arm, 51-First rivet, 52-Second rivet;

[0031] 6-Second connecting arm, 61-Third rivet;

[0032] 7-Third connecting arm, 71-Fourth rivet;

[0033] 8-Outrigger, 81-Limit post, 82-Positioning piece, 821-Rivet cap, 83-Outrigger clamp, 831-Outrigger clamp screw, 84-Fifth rivet. Detailed Implementation

[0034] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] The main purpose of this application is to fill the technical gaps in existing products and provide an outward-opening window hinge with good wind resistance and easy installation.

[0036] The technical solution of this utility model will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0037] This application provides an outward-opening hinge for a window; see [link to relevant documentation]. Figures 1-6 This includes opening and closing components, sliding components, and limiting components.

[0038] The opening and closing assembly includes a base plate 1, a support arm 8, a first connecting arm 5, and a second connecting arm 6. The base plate 1 is fixed to the window frame, and the support arm 8 is fixed to the window sash.

[0039] The sliding assembly includes a slider 11 and a third connecting arm 7; the slider 11 is disposed on the base plate 1 and slidably connected to the base plate 1, and one end of the third connecting arm 7 is rotatably connected to the slider 11 and the other end is rotatably connected to the support arm 8.

[0040] The limiting component includes a limiting block 3, which is fixed to the middle of the base plate 1. The two ends of the first connecting arm 5 are rotatably connected to the base plate 1 and the support arm 8, respectively. The two ends of the second connecting arm 6 are rotatably connected to the base plate 1 and the sliding component, respectively. The first connecting arm 5 and the second connecting arm 6 are located on both sides of the limiting block 3 on the base plate 1 and are limited by the limiting block 3. Further, see the appendix. Figure 1 Alternatively, in the orientation shown in the diagram, the limiting block 3 is fixed to the left of the center of the base plate 1.

[0041] In one embodiment provided in this application, the opening and closing assembly includes a retaining angle 14 fixed to one end of the base plate 1, the retaining angle 14 being perpendicular to the base plate 1. Further, see the appendix. Figure 1 Alternatively, in the orientation shown in the diagram, the corner 14 is fixed to the upper surface of the base plate 1.

[0042] In one embodiment provided in this application, the opening and closing assembly includes a positioning piece 82 fixed to one end of the support arm 8. The positioning piece 82 is arranged parallel to the support arm 8 and extends out of the end of the support arm 8. The first connecting arm 5 is rotatably connected to the support arm 8 and the positioning piece 82 in sequence. The corner bracket 14 is fixed to the base plate 1, and the positioning piece 82 is fixed to the support arm 8. Together with the corner bracket 14, it serves to position and limit the opening direction.

[0043] In one embodiment provided in this application, the sliding assembly includes a liner, a slider rivet 111, and a bolt. A groove is formed on the base plate 1, the slider 11 is sleeved on the base plate 1 and slides along the groove, the liner is placed below the groove, the slider 11 is provided with a through hole and a screw hole, the bolt passes through the through hole, the screw hole, the groove, and the liner in sequence and is fixed by a nut, and the slider rivet 111 passes through the end of the third connecting arm 7 and the through hole of the slider 11 in sequence to rivet together so that the third connecting arm 7 and the slider 11 are rotatably connected.

[0044] Furthermore, the slide is a long groove, and the slider 11 is located in the long groove of the base plate 1. It is connected to the third connecting arm 7 through the slider rivet 111 and slides in the long groove of the base plate, which can realize the smooth opening and closing of the outward-opening window profile. The slider 11 is located in the long groove of the base plate 1 and is connected to the third connecting arm 7 through the slider rivet 111. The slider rivet 111 also plays a limiting role. When the window is opened to the maximum opening angle, the slider rivet 111 contacts the left end of the long groove of the base plate 1 to limit movement.

[0045] In one embodiment provided in this application, the limiting block 3 is butterfly-shaped with concave limiting portions on both sides. The ends of the first connecting arm 5 and the second connecting arm 6 are arc-shaped and disposed in the concave limiting portions. The arc edges of the first connecting arm 5 and the second connecting arm 6 form a transition angle with the edges on both sides. The transition angle is the limit position when the concave limiting portion rotates and when the straight edge coincides with one side of the concave limiting portion.

[0046] In one embodiment provided in this application, the limiting component further includes a gasket 2, which is clamped and fixed between the limiting block 3, the first connecting arm 5, the second connecting arm 6 and the base plate 1, and a U-shaped notch is provided on one side of the gasket 2.

[0047] In one embodiment provided in this application, the limiting component further includes a limiting post 81, which is fixed to the support arm 8 and disposed near the third connecting arm 7. When the hinge is opened to the maximum opening angle, the limiting post 81 contacts the third connecting arm 7 to restrict its movement.

[0048] In the aforementioned limiting assembly, the multi-point limiting assembly consisting of limiting block 3 and limiting post 81 jointly restricts the maximum opening angle of the hinge, enabling the hinge to have good wind resistance and reliability. The gasket 2 has a U-shaped notch, which cooperates with the limiting block 3 to be fixed between the first connecting arm 5 and the second connecting arm 6. When the hinge is opened to the maximum opening angle, the limiting block 3 contacts the first connecting arm 5 and the second connecting arm 6 to restrict movement.

[0049] In one embodiment provided in this application, a sleeve is fitted on the second connecting arm 6, and one end of the sleeve and the second connecting arm 6 are rotatably connected to the third connecting arm 7.

[0050] In one embodiment provided in this application, the hinge further includes a fixing component, which includes a limiting block clip assembly and at least one base plate clip assembly. The base plate clip assembly fixes the base plate 1 to the window frame, and the limiting block clip assembly sequentially fixes the limiting block 3, the gasket 2 and the base plate 1 to the window frame.

[0051] In one embodiment provided in this application, a fixing part perpendicular to the end of the support arm 8 is provided, and a support arm clip assembly is provided to fix the support arm 8 to the side of the window sash. Further, the support arm clip assembly includes a support arm clip 83 and a support arm clip screw 831, the support arm clip screw 831 passing through the fixing part of the support arm and the side of the window sash being fixed by the support arm clip 83.

[0052] In one embodiment provided in this application, the support arm 8 is rotatably connected to the first connecting arm 5 via a second rivet 52, and the first connecting arm 5 and the second connecting arm 6 are rotatably connected to the base plate 1 via a first rivet 51 and a third rivet 61, respectively; the third connecting arm 7 is rotatably connected to the second connecting arm 6 and the support arm 8 via a fourth rivet 71 and a fifth rivet 84, respectively. The rivets at each rotatable connection can cooperate with the rivet cap 821. After the hinge is installed on the outward-opening window profile, it can bear the weight of the window sash and complete the opening and closing of the window sash, realizing and limiting the opening angle of the window sash.

[0053] Furthermore, the limiting block clamping assembly includes a limiting block clamping piece 4 and a limiting block clamping piece rivet 41. The limiting block clamping piece rivet 41 passes through the limiting block 3, the gasket 2, the base plate 1 and the window frame in sequence and is fixed by the limiting block clamping piece 4.

[0054] The base plate clamp assembly includes base plate clamps and base plate clamp rivets. This application provides two embodiments of this structure.

[0055] Example 1

[0056] The base plate clamp assembly includes a first base plate clamp 12, a first base plate clamp rivet 121, a second base plate clamp 13, and a second base plate clamp rivet 131. The first base plate clamp rivet 121 passes through the base plate 1 and the window frame and is fixed by the first base plate clamp 12. The second base plate clamp rivet 131 passes through the base plate 1 and the window frame and is fixed by the second base plate clamp 13.

[0057] In this embodiment, the installation process of the outward-opening hinge for the window is as follows:

[0058] Insert the support arm 8 into the window sash mounting slot, then rotate the support arm clip screw 831 to rotate and fix the support arm clip 83 onto the window sash. Finally, use the fastening screw to further fix it into the mounting slot of the window frame, thus fixing the support arm 8 to the window sash. The support arm clip assembly serves as a temporary fixation and facilitates adjustment, while the fastening screw provides further fixation.

[0059] The base plate 1 is placed in the reserved position on the window frame. It can be first fixed to the window frame by rotating the first base plate clamping rivet 121, the limiting block clamping rivet 41, and the second base plate clamping rivet 131. Then observe whether the window sash is in the center of the window frame. If it is not in the center, the fixing can be removed by rotating the first base plate clamping rivet 121, the limiting block clamping rivet 41, and the second base plate clamping rivet 131. After debugging and installation, it can be reinstalled and observed. If it is in the center, the fixing effect can be strengthened by screws after confirmation. The base plate clamping assembly and the limiting block clamping assembly serve as temporary fixation and facilitate debugging, while the screws further strengthen the fixing effect.

[0060] Outward-opening hinges can be installed on both the top and bottom of the window sash, and both the top and bottom hinges can be installed and adjusted as described above.

[0061] Example 2

[0062] The base plate clamp assembly includes a first base plate clamp 12 and a first base plate clamp rivet 121. The first base plate clamp rivet 121 passes through the base plate 1 and the window frame and is fixed by the first base plate clamp 12. The base plate 1 is provided with a connecting hole 15, and the base plate 1 is fixed to the window frame by screws passing through the connecting hole 15.

[0063] Insert the support arm 8 into the window sash mounting slot, then rotate the support arm clip screw 831 to rotate and fix the support arm clip 83 onto the window sash. Finally, use the fastening screw to further fix it into the mounting slot of the window frame, thus fixing the support arm 8 to the window sash. The support arm clip assembly serves as a temporary fixation and facilitates adjustment, while the fastening screw provides further fixation.

[0064] The base plate 1 is placed in the reserved position on the window frame. First, by rotating the first base plate clamping rivet 121 and the limiting block clamping rivet 41, the corresponding first base plate clamping pieces 12 and 4 are rotated and fixed to the window frame. Then, observe whether the window sash is in the center of the window frame. If it is not in the center, the fixing can be removed by rotating the first base plate clamping rivet 121 and the limiting block clamping rivet 41. After debugging and installation, it can be reinstalled and observed. If it is in the center, after confirmation, the fixing effect can be strengthened by screws. In the second base plate clamping rivet 131 position of Embodiment 1, a connecting hole 15 is opened, and screws are used for securing it. The base plate clamping assembly and the limiting block clamping assembly serve as temporary fixation and facilitate debugging, while the screws further strengthen the fixing effect.

[0065] Outward-opening hinges for windows need to be installed on both the top and bottom of the window sash. Both the top and bottom hinges can be installed and adjusted as described above.

[0066] The outward-opening hinge for windows of this utility model has two structures. The difference between the first and second embodiments lies in the presence or absence of the second base plate clamping rivet 131 and the second base plate clamping piece 13. Compared with the second embodiment, the first embodiment has a simpler and more efficient installation and disassembly method, while the second embodiment has higher strength and reliability.

[0067] This utility model discloses an outward-opening hinge for windows. Its opening and closing components enable the hinge to open and close, thus adapting to the opening and closing actions of windows installed on outward-opening window profiles. During opening, the angle between the base plate 1 and the support arm 8 increases, and the slider 11 gradually approaches the center of the hinge until the hinge is opened to its maximum angle. At this point, the slider 11 slides to its closest position to the center of the hinge, and the slider rivet 111 contacts the left end of the long groove in the base plate 1. Simultaneously, the first connecting arm 5, the second connecting arm 6, and the limiting block 3 contact each other, and the third connecting arm 7 contacts the limiting post 81, collectively limiting the maximum opening angle of the hinge.

[0068] The outward-opening hinge for windows of this utility model has a sliding component that enables smooth movement. The sliding component is located in the long groove of the base plate 1 and is connected to the third connecting arm 7 by rivets, which enables smooth opening and closing when installed on the outward-opening window profile.

[0069] This utility model discloses an outward-opening window hinge, whose fixing components enable the hinge to be installed on the window sash. During installation, the support arm 8 is inserted into the window sash mounting groove and then secured with support arm clips 83 and screws. The base plate 1 can be initially fixed to the window frame using base plate clip assemblies and limiting block clip assemblies. After adjusting the installation gap, screws are used to reinforce the fixation. Its installation position is easy to adjust, and the installation and disassembly methods are simple and efficient, improving the efficiency of hinge installation and disassembly while reducing installation difficulty.

[0070] In the outward-opening hinge for windows of this utility model, the limiting block clip 4 in the fixing component fixes the hinge to the window frame during actual installation. Its position between the first connecting arm 5 and the second connecting arm 6 can improve the reliability of the hinge and reduce the risk of deformation.

[0071] The outward-opening hinge for windows of this utility model has a limiting component that can limit the maximum opening angle of the hinge. When the hinge is opened to the maximum angle position, the first connecting arm 5 and the second connecting arm 6 are in contact with the limiting block 3, the third connecting arm 7 is in contact with the limiting post 81, and the slider rivet 111 is in contact with the left end of the long groove of the base plate 1. The multiple limiting points together limit the maximum opening angle of the hinge.

[0072] This utility model discloses an outward-opening window hinge, comprising an opening and closing component, a fixing component, a sliding component, and a limiting component. After being installed on an outward-opening window profile, it can bear the weight of the window sash and perform the opening and closing actions of the window sash, and realize and limit the opening angle of the window sash. Its limiting component limits the maximum opening angle when the window is open, and the multi-point limiting enables the hinge to have good wind resistance. In addition, the installation and disassembly methods are simple and efficient, which improves the efficiency of hinge installation and disassembly and reduces installation difficulty and cost.

[0073] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An outward-opening hinge for a window, characterized in that, Includes opening and closing components, sliding components, and limiting components. The opening and closing assembly includes a base plate (1), a support arm (8), a first connecting arm (5), and a second connecting arm (6). The base plate (1) is fixed to the window frame, and the support arm (8) is fixed to the window sash. The sliding assembly includes a slider (11) and a third connecting arm (7); the slider (11) is disposed on the base plate (1) and slidably connected to the base plate (1); one end of the third connecting arm (7) is rotatably connected to the slider (11) and the other end is rotatably connected to the support arm (8); The limiting component includes a limiting block (3), which is fixed in the middle of the base plate (1). The two ends of the first connecting arm (5) are rotatably connected to the base plate (1) and the support arm (8) respectively. The two ends of the second connecting arm (6) are rotatably connected to the base plate (1) and the sliding component respectively. The first connecting arm (5) and the second connecting arm (6) are located on both sides of the limiting block (3) on the base plate (1) and are limited by the limiting block (3).

2. The outward-opening hinge for a window as described in claim 1, characterized in that, The opening and closing assembly includes a corner bracket (14) fixed to one end of the base plate (1), and the corner bracket (14) is set perpendicular to the base plate (1).

3. The outward-opening hinge for a window as described in claim 1, characterized in that, The opening and closing assembly includes a positioning piece (82) fixed to one end of the support arm (8). The positioning piece (82) is arranged parallel to the support arm (8) and extends out of the end of the support arm (8). The first connecting arm (5) is rotatably connected to the support arm (8) and the positioning piece (82) in sequence.

4. The outward-opening hinge for a window as described in claim 1, characterized in that, The sliding assembly includes a liner, a slider rivet (111), and a bolt. A groove is provided on the base plate (1). The slider (11) is fitted onto the base plate (1) and slides along the groove. The liner is placed below the groove. A through hole and a screw hole are provided on the slider (11). The bolt passes through the through hole, screw hole, groove, and liner in sequence and is fixed by a nut. The slider rivet (111) passes through the end of the third connecting arm (7) and the through hole of the slider (11) in sequence to rivet the third connecting arm (7) and the slider (11) so that the third connecting arm (7) and the slider (11) are rotatably connected.

5. A window outward-opening hinge as described in claim 1, characterized in that, The limiting block (3) is butterfly-shaped and has concave limiting portions on both sides. The ends of the first connecting arm (5) and the second connecting arm (6) are arc-shaped and set in the concave limiting portions. The arc edges of the first connecting arm (5) and the second connecting arm (6) form a transition angle with the edges on both sides. The transition angle is the limit position when the concave limiting portion rotates and when the straight edge coincides with one side of the concave limiting portion.

6. The outward-opening hinge for a window as described in claim 1, characterized in that, The limiting component also includes a gasket (2), which is clamped and fixed between the limiting block (3), the first connecting arm (5), the second connecting arm (6) and the base plate (1), and a U-shaped notch is provided on one side of the gasket (2).

7. The outward-opening hinge for a window as described in claim 1, characterized in that, The limiting component also includes a limiting post (81), which is fixed on the support arm (8) and located near the third connecting arm (7). When the hinge is opened to the maximum opening angle, the limiting post (81) contacts the third connecting arm (7) to restrict its movement.

8. A window outward-opening hinge as described in claim 1, characterized in that, The hinge also includes a fixing component, which includes a limiting block clamping component and at least one base plate clamping component. The base plate clamping component fixes the base plate (1) to the window frame, and the limiting block clamping component fixes the limiting block (3), the gasket (2) and the base plate (1) to the window frame in sequence.

9. A window outward-opening hinge as described in claim 1, characterized in that, The end of the support arm (8) is provided with a fixing part perpendicular to the support arm (8), and a support arm clip assembly is provided to fix the support arm (8) to the side of the window sash.

10. A window outward-opening hinge as described in claim 1, characterized in that, The support arm (8) is rotatably connected to the first connecting arm (5) by the second rivet (52), and the first connecting arm (5) and the second connecting arm (6) are rotatably connected to the base plate (1) by the first rivet (51) and the third rivet (61) respectively; the third connecting arm (7) is rotatably connected to the second connecting arm (6) and the support arm (8) by the fourth rivet (71) and the fifth rivet (84) respectively.

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