Opening and closing mechanism and range hood thereof

Abstract

The utility model discloses an opening and closing mechanism and a range hood thereof, and the opening and closing mechanism comprises a turning plate assembly, and a connecting bracket is arranged on the back surface of the turning plate assembly; the driving assembly comprises a driver, a first connecting rod and a second connecting rod, the front end of the second connecting rod is movably connected with the connecting support, and the rear end of the second connecting rod is movably connected with the output end of the driver through the first connecting rod; the protection assembly comprises a lower shell and an upper cover plate, a containing cavity with openings in the front end and the rear end is formed between the upper cover plate and the lower shell, and the second connecting rod transversely penetrates through the containing cavity and is detachably connected with the lower shell and / or the upper cover plate. According to the opening and closing mechanism, the second connecting rod can be hidden in the protection assembly, and the problems of motion jamming, abnormal sound and the like caused by the fact that oil stains adhere to the second connecting rod are solved.

Description

Technical Field

[0001] This utility model relates to the field of range hood technology, and in particular to an opening and closing mechanism and its oil extraction range hood. Background Technology

[0002] Side-suction range hoods with flap opening and closing have a motor that drives the flap assembly to open and close via a push rod or connecting rod. When the flap assembly is open, the push rod or connecting rod is exposed in the smoke collection area of ​​the flap, which is prone to accumulating oil and dirt, leading to problems such as movement jamming and abnormal noise.

[0003] In addition, the display control panel is usually located on the hinged glass, and the switch connection wires also need to be connected to the main board of the cabinet. Most of them are exposed in the smoke collection area of ​​the flip panel and are pressed down by clips. Located in the main oil circuit area, they are prone to oil accumulation, corrosion and damage, and failure, and are not aesthetically pleasing. Summary of the Invention

[0004] This invention aims to at least partially solve one of the problems existing in the prior art. To this end, this invention proposes an opening and closing mechanism that conceals the second connecting rod within a protective assembly, preventing oil stains from adhering to the second connecting rod and causing problems such as movement jamming and abnormal noise. This invention also provides a range hood.

[0005] The opening and closing mechanism described above is implemented through the following technical solution:

[0006] An opening and closing mechanism includes: a flap assembly with a connecting bracket on the back of the flap assembly; a drive assembly disposed behind the flap assembly and including a driver, a first connecting rod, and a second connecting rod, wherein the front end of the second connecting rod is movably connected to the connecting bracket, and the rear end is movably connected to the output end of the driver through the first connecting rod; and a protective assembly including a lower housing and an upper cover plate, wherein the upper cover plate is detachably installed in the lower housing and located in front of the first connecting rod, and a receiving cavity with openings at both the front and rear ends is formed between the upper cover plate and the lower housing, and the second connecting rod is transversely inserted through the receiving cavity and is detachably connected to the lower housing and / or the upper cover plate.

[0007] In some embodiments, a lower slot is provided in the lower housing and located within the receiving cavity, and the lower end of the second connecting rod is inserted into the lower slot; and / or an upper partition extending downward and located within the receiving cavity is fixed at the bottom of the top plate of the upper cover plate, and an upper slot is formed between the upper partition and the first side wall of the lower housing, and the upper end of the second connecting rod is inserted into the upper slot.

[0008] In some embodiments, the second connecting rod has a plurality of mounting holes spaced apart in front and behind and located in the receiving cavity. A first buckle is protruding on the inner surface of the first side wall of the lower housing at the position corresponding to the mounting holes. The first buckle engages with the corresponding mounting holes. And / or a downwardly extending undercut is fixed at the bottom of the top plate of the upper cover at the position corresponding to the mounting holes. The undercut engages with the corresponding mounting holes.

[0009] In some embodiments, the lower housing and the upper cover are detachably connected by fasteners or snap-fit ​​structures, and / or a positioning part is fixed on the upper cover or the lower housing.

[0010] In some embodiments, a plurality of engaging holes are provided on the side plate of the upper cover plate at intervals, and a second buckle is provided on the inner surface of the second side wall of the lower housing at the position corresponding to the engaging holes, and the second buckle engages with the corresponding engaging holes.

[0011] In some embodiments, the first connecting rod and the second connecting rod are movably connected by a pin, and a rear clearance hole is provided on the first side wall of the lower housing corresponding to the position of the pin; and / or the drive assembly further includes a connecting rod, the connecting rod being vertically disposed on the back of the flap assembly, and its upper and lower ends being detachably connected to the connecting bracket respectively, the front end of the second connecting rod being movably connected to the middle part of the connecting rod by a pivot, and a front clearance hole is provided on the first side wall of the lower housing corresponding to the position of the connecting rod.

[0012] In some embodiments, a switch assembly is also included, which is mounted on the back of the flap assembly and has an outwardly extending switch connection line that extends laterally through the receiving cavity.

[0013] In some embodiments, a wire passage groove is formed in the receiving cavity, arranged parallel to and spaced apart from the second connecting rod, and the switch connecting wire passes laterally through the wire passage groove.

[0014] In some embodiments, a shielding cover is also included, which covers a section of the switch connection line located between the switch assembly and the protective assembly, and the shielding cover is detachably connected to at least two of the switch assembly, the flap assembly, and the connecting bracket.

[0015] In some embodiments, a back opening is provided on the back of the cover near the end of the second connecting rod. The front end of the protective assembly and the front end of the second connecting rod both extend into the cover through the back opening. The connecting bracket is provided with a connecting part that extends into the cover and is connected to the second connecting rod.

[0016] The range hood described above achieves its function through the following technical solution:

[0017] A range hood includes: a housing assembly with an air inlet and a mounting hole on the front side; and an opening and closing mechanism as described above, wherein the upper end of a flap assembly is rotatably connected to the housing assembly for opening and closing the air inlet and the mounting hole, a driver is installed inside the housing assembly, and a second connecting rod and a protective assembly are movably inserted through the mounting hole.

[0018] Compared with the prior art, the present invention has at least the following beneficial effects:

[0019] 1. The opening and closing mechanism of this utility model, by transversely inserting the second connecting rod into the receiving cavity of the protective component and detachably connecting it to the protective component, facilitates disassembly and assembly, and ensures a stable and reliable connection. This allows the second connecting rod to be hidden inside the protective component, preventing oil stains from adhering to the second connecting rod and causing problems such as movement jamming and abnormal noise.

[0020] 2. By installing the switch assembly on the back of the flip panel assembly, and having the switch connection wire of the switch assembly pass horizontally through the receiving cavity of the protective assembly, the exposed part of the switch connection wire is hidden inside the protective assembly, solving the problem that the existing switch connection wires are not aesthetically pleasing and are prone to oil accumulation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the opening and closing mechanism according to an embodiment of the present invention;

[0022] Figure 2 This is an exploded view of the opening and closing mechanism of an embodiment of this utility model;

[0023] Figure 3 This is a schematic diagram of the structure of the driving component and the protective component according to an embodiment of the present invention;

[0024] Figure 4 This is a cross-sectional view of the driving component and the protective component according to an embodiment of the present invention. Figure 1 ;

[0025] Figure 5 This is a cross-sectional view of the driving component and the protective component according to an embodiment of the present invention. Figure 2 ;

[0026] Figure 6 This is a schematic diagram of the lower shell structure according to an embodiment of the present invention;

[0027] Figure 7 This is a schematic diagram of the structure of the upper cover plate in an embodiment of this utility model;

[0028] Figure 8 This is a schematic diagram of the structure of the shielding cover according to an embodiment of the present utility model;

[0029] Figure 9 This is a schematic diagram of the structure of the range hood according to an embodiment of the present invention;

[0030] Figure 10 This is a cross-sectional view of the range hood according to an embodiment of this utility model.

[0031] In the diagram: 1-Flip panel assembly, 11-Glass panel, 12-Flip panel bracket, 13-Connecting bracket, 131-Connecting part, 14-Hinge; 2-Drive assembly, 21-Driver, 22-First connecting rod, 23-Second connecting rod, 231-Mounting hole, 24-Pin, 25-Connecting rod, 26-Fixing bracket, 27-Fastener; 3-Protective assembly, 301-Lower slot, 303-Wire passage slot, 31-Lower housing, 3 11-Lower partition, 312-First buckle, 313-Second buckle, 314-Rear clearance hole, 315-Front clearance hole, 32-Upper cover plate, 321-Upper partition, 322-Inverted buckle, 323-Positioning part, 324-Activation hole; 4-Switch assembly, 41-Cable outlet, 42-Activation groove; 5-Shielding cover, 50-Notch, 51-Back opening, 52-Limiting groove, 53-Limiting buckle, 54-Screw hole;

[0032] 6-Housing assembly, 61-Mounting hole. Detailed Implementation

[0033] The following embodiments illustrate the present invention, but the present invention is not limited to these embodiments. Modifications to the specific implementation of the present invention or equivalent substitutions for some technical features, without departing from the spirit of the present invention, should all be covered within the scope of the technical solution claimed by the present invention.

[0034] Example 1

[0035] refer to Figure 1-7 This embodiment provides an opening and closing mechanism, including a flap assembly 1, a drive assembly 2, and a protective assembly 3. A connecting bracket 13 is provided on the back of the flap assembly 1. The drive assembly 2 is located behind the flap assembly 1 and includes a driver 21, a first connecting rod 22, and a second connecting rod 23. The front end of the second connecting rod 23 is movably connected to the connecting bracket 13, and the rear end is movably connected to the output end of the driver 21 through the first connecting rod 22, so that the driver can drive the flap assembly 1 to perform opening and closing movements through the two connecting rods.

[0036] The protective component 3 is fitted over the second connecting rod 23 and partially or completely covers the second connecting rod 23. The protective component 3 includes a lower housing 31 and an upper cover plate 32. The upper cover plate 32 is detachably installed inside the lower housing 31 and is located in front of the first connecting rod 22. A receiving cavity with openings at both the front and rear ends is formed between the upper cover plate 32 and the lower housing 31 (not shown in the figure). The second connecting rod 23 is transversely inserted into the receiving cavity of the protective component 3 and is detachably connected to the lower housing 31 and / or the upper cover plate 32, which facilitates quick assembly and disassembly and ensures a stable and reliable connection. This allows the second connecting rod 23 to be hidden inside the protective component 3, preventing oil stains from adhering to the second connecting rod 23 and causing problems such as movement jamming and abnormal noise.

[0037] refer to Figure 1-2 The flap assembly 1 includes a glass flap 11, two flap supports 12, a connecting bracket 13, and two hinges 14. The two flap supports 12 are respectively fixedly installed on the left and right sides of the back of the glass flap 11. A connecting bracket 13 is provided on one of the flap supports 12. Hinges 14 are respectively connected and fixed to the upper ends of the two flap supports 12. The flap assembly 1 can be pivotally connected to the outer shell assembly 6 of the range hood through the two hinges 14 (see...). Figure 10 In this embodiment, the connecting bracket 13 is installed on the flip bracket 12 arranged on the right. The connecting bracket 13 is provided with two connecting parts 131 arranged vertically at intervals. The two connecting parts 131 are used to connect with the front end of the second connecting rod 23. The flip bracket 12 arranged on the right is provided with at least one engaging groove 42, which is used to engage the cover.

[0038] refer to Figure 1-3 The drive assembly 2 also includes a pin 24, and the rear ends of the first connecting rod 22 and the second connecting rod 23 are movably connected through the pin 24; and / or the drive assembly 2 also includes a connecting rod 25, which is vertically disposed on the back of the flap assembly 1, and its upper and lower ends are respectively detachably connected to the two connecting parts 131 of the connecting bracket 13 through fasteners 27. The front end of the second connecting rod 23 is movably connected to the middle part of the connecting rod 25 through a pivot (not shown in the figure), which helps to further improve the stability and reliability of the connection between the second connecting rod 23 and the connecting bracket 13.

[0039] refer to Figure 2-7The lower housing 31 is generally U-shaped, with a first sidewall 3101 and a second sidewall 3102 arranged opposite to each other. A lower retaining groove 301 is provided within the receiving cavity, open at the top and rear. The lower end of the second connecting rod 23 is inserted into the lower retaining groove 301, thereby limiting the left and right movement of the lower end of the second connecting rod 23 and preventing displacement during movement. And / or the upper cover plate 32 is generally inverted L-shaped, with a top plate 32... The bottom is integrally formed with an upper partition 321 extending downward and located in the receiving cavity. An upper slot (not shown in the figure) is formed between the upper partition 321 and the first side wall 3101 of the lower housing 31. An upper part of a wire groove 303 is formed between the upper partition 321 and the side plate 3202 of the upper cover plate 32. The upper end of the second connecting rod 23 is inserted into the upper slot, thereby limiting the upper end of the second connecting rod 23 to the left and right and preventing the second connecting rod from shifting during the movement.

[0040] In this embodiment, both the lower housing 31 and the upper cover plate 32 are made of plastic, allowing the protective component 3 to be flexibly matched with the overall appearance color of the machine, thus improving its adaptability. An upwardly extending lower partition 311 is integrally formed within the lower housing 31, dividing the interior of the lower housing 31 into a lower retaining groove 301 and a lower portion of a wire passage groove 303. Specifically, a lower retaining groove 301 is formed between the lower partition 311 and the first side wall 3101 of the lower housing 31, and a lower portion of a wire passage groove is formed between the lower partition 311 and the second side wall 3102 of the lower housing 31. The lower partition 311 consists of multiple lower protruding ribs arranged at intervals, thereby improving the overall strength of the lower housing 31 and limiting the second connecting rod, while also reducing costs and allowing the lower portions of the lower retaining groove 301 and the wire passage groove 303 to connect. The upper partition 321 is composed of multiple upper protruding ribs arranged at intervals, which improves the overall strength of the upper cover plate 32, while also helping to reduce costs and connecting the upper part of the upper slot and the wire groove 303.

[0041] refer to Figure 2-7The second connecting rod 23 has multiple mounting holes 231 arranged at intervals and located within the receiving cavity. A first buckle 312 protrudes from the inner surface of the first side wall 3101 of the lower housing 31 at the position corresponding to the mounting holes 231. The first buckle 312 engages with the lower wall of the corresponding mounting hole 231, thereby allowing the lower housing 31 to be quickly disassembled and connected to the second connecting rod 23, preventing it from loosening and falling off. And / or, an inverted buckle 322 is integrally formed on the top plate 3201 of the upper cover 32 at the position corresponding to the mounting holes 231, extending downwards. The inverted buckle 322 engages with the upper wall of the corresponding mounting hole 231, thereby allowing the upper cover 32 to be quickly disassembled and connected to the second connecting rod 23, preventing it from loosening and falling off. It can be seen that the mounting holes 231 of the second connecting rod 23 are configured to engage with the first buckle 312 of the lower housing 31 and the inverted buckle of the upper cover 32 respectively (see...). Figure 4 This design allows for multiple uses from a single hole, reducing the number of openings required for the second link 23 and ensuring the strength of the second link.

[0042] The lower housing 31 and the upper cover plate 32 are detachably connected by fasteners (e.g., screws) or snap-fit ​​structures so that the lower housing 31 and the upper cover plate 32 can be quickly disassembled and assembled and the connection between the two is stable and reliable; and / or a positioning part 323 is fixed on the upper cover plate 32 or the lower housing 31 to achieve quick pre-positioning between the lower housing 31 and the upper cover plate 32.

[0043] refer to Figure 5-7 In this embodiment, the side plate 3202 of the upper cover plate 32 is provided with a plurality of engaging holes 324 arranged at intervals. A second buckle 313 protrudes from the inner surface of the second side wall 3102 of the lower housing 31 at a position corresponding to the engaging holes 324. The second buckle 313 engages with the corresponding engaging holes 324 to quickly attach and detach the upper cover plate 32 from the lower housing 31, ensuring a stable and reliable connection between the two. A positioning portion 323 protrudes from the front end of the top plate 3201 of the upper cover plate 32, extending outwards. This positioning portion 323 abuts against the front end of the first side wall of the lower housing 31.

[0044] refer to Figure 3 A rear clearance hole 314 is provided at the position of the pin 24 at the rear end of the first side wall 3101 of the lower housing 31, and / or a front clearance hole 315 is provided at the position of the connecting rod 25 at the rear end of the first side wall 3101 of the lower housing 31.

[0045] Example 2

[0046] refer to Figure 1-2The difference between this embodiment and embodiment 1 is that the opening and closing mechanism also includes a switch assembly 4. The switch assembly 4 is installed on the back of the flap assembly 1 and has an outwardly extending switch connection line (not shown in the figure). The switch connection line passes horizontally through the receiving cavity of the protective assembly 3, thereby hiding the exposed part of the switch connection line inside the protective assembly 3, which solves the problem that the existing switch connection line is not aesthetically pleasing and is prone to oil accumulation.

[0047] refer to Figure 1-7 Within the receiving cavity of the protective component 3, a wire passage groove 303 is formed, arranged parallel to and spaced apart from the second connecting rod 23. In this embodiment, the lower partition 311 of the lower housing 31 and the upper partition 321 of the upper cover 32 jointly divide the receiving cavity into the wire passage groove 303 and the mounting slot. The mounting slot includes a lower slot 301 and an upper slot that are connected to each other. The switch connecting wire 41 passes laterally through the wire passage groove 303. This allows the switch connecting wire 41 and the second connecting rod 23 to be installed in different spaces within the receiving cavity, effectively ensuring that the switch connecting wire 41 and the second connecting rod 23 do not interfere with each other during the operation of the opening and closing mechanism.

[0048] In this embodiment, the switch assembly 4 is installed on the back of the glass flip panel 11 and located between the two flip panel supports 12. A wire outlet 41 is provided at the end of the switch assembly 4 near the drive assembly 2, and the switch connection wire 41 is led out from the wire outlet 41. In addition, two engaging grooves 42 are provided at the end of the switch assembly 4 near the drive assembly 2. The two engaging grooves 42 are located on the upper and lower sides of the wire outlet 41, respectively, for engaging the shielding cover 5.

[0049] refer to Figure 1-2 and Figure 8 Furthermore, the opening and closing mechanism also includes a shielding cover 5, which covers the section of the switch connection line 41 located between the switch assembly 4 and the protective assembly 3. The shielding cover 5 is detachably connected to at least two of the switch assembly 4, the flap assembly 1, and the connecting bracket 13. Thus, through the cooperation of the shielding cover 5 and the protective assembly 3, the exposed part of the switch connection line is wrapped up and not exposed, effectively preventing oil accumulation on the surface of this part of the switch connection line.

[0050] A back opening 51 is provided on the back of the cover 5 near the second connecting rod 23. The front end of the protective component 3 and the front end of the second connecting rod 23 both extend into the cover 5 through the back opening 51. The connecting bracket 13 is provided with two connecting parts 131 that extend into the cover 5. The two connecting parts 131 are connected to the second connecting rod 23 through the connecting rod 25. This allows the cover to not only cover the exposed switch connection wires, but also to cover the connection between the connecting rod 25 and the connecting bracket 13.

[0051] In this embodiment, a notch 50 is provided on the side wall of the shielding cover 5 away from the switching assembly 4. This notch 50 corresponds to the connection point where the front end of the second connecting rod 23 is connected to the connecting rod 25 via a pivot, so as to provide space for the pivot to move. Two limiting slots 52 are provided inside the shielding cover 5, located on the upper and lower outer sides of the back opening 51. The upper and lower ends of the connecting rod 25 are respectively inserted into the two limiting slots 52, so as to hide the upper and lower ends of the connecting rod 25 through the shielding cover 5.

[0052] The upper and lower outer side walls of the shielding cover 5 are respectively provided with outwardly extending limiting buckles 53. The switch assembly 4 and the flip assembly 1 are provided with engaging grooves 42 at the positions corresponding to the limiting buckles 53. The engaging grooves 42 engage with the corresponding limiting buckles to achieve detachable installation of the shielding cover 5 on the switch assembly 4 and the flip assembly 1. In addition, the outer side wall of the shielding cover 5 near the connecting rod 25 is provided with screw holes 54 for fasteners 27 to pass through. The fasteners 27 are transversely inserted from the outside to the inside through the screw holes 54, the connecting part 131 of the connecting bracket 13, and the connecting rod 25 of the shielding cover 5, thereby achieving detachable installation of the shielding cover 5 on the connecting bracket 13 of the flip assembly 1 and the connecting rod 25 of the drive assembly 2.

[0053] Example 3

[0054] refer to Figure 9-10 This embodiment provides a range hood, which includes a housing assembly 6 and an opening and closing mechanism as described in Embodiment 1 or 2. An air inlet (not shown in the figure) and a mounting hole 61 are provided on the front of the housing assembly 6. The upper end of the flap assembly 1 is rotatably connected to the housing assembly 6 and is used to open and close the air inlet and the mounting hole 61. A driver 21 is installed inside the housing assembly 6. The second connecting rod 23 and the protective assembly 3 can both be movably and laterally inserted through the mounting hole 61.

[0055] refer to Figure 10 When the flap assembly 1 opens the air inlet and the mounting hole 61, a flap smoke collection area is formed between the flap assembly 1 and the front of the outer casing assembly 6. At this time, the protective assembly 3 is exposed in the flap smoke collection area and completely covers the section of the second link 23 and the switch connection line located in the flap smoke collection area, improving the aesthetics and effectively preventing oil accumulation on the exposed part of the second link 23 and the switch connection line.

[0056] The above descriptions are merely some embodiments of this utility model. For those skilled in the art, various modifications and improvements can be made without departing from the inventive concept of this utility model, and all such modifications and improvements fall within the protection scope of this utility model.

Claims

1. An opening and closing mechanism characterized by comprising: include: A flap assembly (1) is provided with a connecting bracket (13) on the back of the flap assembly (1); The drive assembly (2) is located behind the flap assembly (1) and includes a driver (21), a first link (22) and a second link (23). The front end of the second link (23) is movably connected to the connecting bracket (13), and the rear end is movably connected to the output end of the driver (21) through the first link (22). as well as The protective component (3) includes a lower housing (31) and an upper cover plate (32). The upper cover plate (32) is detachably installed inside the lower housing (31) and located in front of the first connecting rod (22). A receiving cavity with openings at both ends is formed between the upper cover plate (32) and the lower housing (31). The second connecting rod (23) passes laterally through the receiving cavity and is detachably connected to the lower housing (31) and / or the upper cover plate (32).

2. An opening and closing mechanism according to claim 1, characterized in that The lower housing (31) is provided with a lower slot (301) located in the receiving cavity, and the lower end of the second connecting rod (23) is inserted into the lower slot (301); and / or the bottom of the top plate of the upper cover plate (32) is fixed with an upper partition (321) extending downward and located in the receiving cavity, and an upper slot is formed between the upper partition (321) and the first side wall of the lower housing (31), and the upper end of the second connecting rod (23) is inserted into the upper slot.

3. The opening and closing mechanism according to claim 1, characterized in that The second connecting rod (23) has a plurality of mounting holes (231) arranged at intervals in front and behind and located in the receiving cavity. A first buckle (312) is provided on the inner surface of the first side wall of the lower housing (31) at the position corresponding to the mounting hole (231). The first buckle (312) engages with the mounting hole (231). And / or a downwardly extending buckle (322) is fixed on the bottom of the top plate of the upper cover plate (32) at the position corresponding to the mounting hole (231). The buckle (322) engages with the mounting hole (231).

4. The opening and closing mechanism according to claim 1, characterized in that, The lower housing (31) and the upper cover plate (32) are detachably connected by fasteners or snap-fit ​​structures, and / or a positioning part (323) is fixed on the upper cover plate (32) or the lower housing (31).

5. The opening and closing mechanism according to claim 4, characterized in that, The side plate of the upper cover (32) has a plurality of locking holes (324) arranged at intervals. The inner surface of the second side wall of the lower housing (31) is provided with a second buckle (313) at the position corresponding to the locking hole (324). The second buckle (313) engages with the corresponding locking hole (324).

6. The opening and closing mechanism according to claim 1, characterized in that, The first connecting rod (22) and the second connecting rod (23) are movably connected by a pin (24), and a rear clearance hole (314) is provided on the first side wall of the lower housing (31) at the position corresponding to the pin (24); and / or The drive assembly (2) also includes a connecting rod (25), which is vertically disposed on the back of the flap assembly (1) and its upper and lower ends are detachably connected to the connecting bracket (13). The front end of the second connecting rod (23) is movably connected to the middle part of the connecting rod (25) through a rotating shaft. A front clearance hole (315) is provided on the first side wall of the lower housing (31) at the position corresponding to the connecting rod (25).

7. An opening and closing mechanism according to any one of claims 1-6, characterized in that, It also includes a switch assembly (4), which is mounted on the back of the flap assembly (1) and has an outwardly extending switch connection line that passes through the receiving cavity laterally.

8. The opening and closing mechanism according to claim 7, characterized in that, A wire passage groove (303) is formed in the receiving cavity, arranged side by side and spaced apart from the second connecting rod (23), and the switch connecting wire passes through the wire passage groove (303) laterally.

9. The opening and closing mechanism according to claim 7, characterized in that, It also includes a shielding cover (5) which covers a section of the switch connection line located between the switch assembly (4) and the protective assembly (3), and the shielding cover (5) is detachably connected to at least two of the switch assembly (4), the flap assembly (1) and the connecting bracket (13).

10. The opening and closing mechanism according to claim 9, characterized in that, A back opening (51) is provided on the back of the cover (5) near the second connecting rod (23). The front end of the protective component (3) and the front end of the second connecting rod (23) both extend into the cover (5) through the back opening (51). The connecting bracket (13) is provided with a connecting part (131) that extends into the cover (5). The connecting part (131) is connected to the second connecting rod (23).

11. A range hood, characterized in that, include: The housing assembly (6) has an air inlet and a mounting hole (61) on its front side; According to any one of claims 1-10, the upper end of the flap assembly (1) is rotatably connected to the outer shell assembly (6) for opening and closing the air inlet and the mounting hole (61), the driver (21) is installed inside the outer shell assembly (6), and the second connecting rod (23) and the protective assembly (3) are both movably inserted through the mounting hole (61).

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