Turnover mechanism and range hood

Abstract

The utility model discloses a turnover mechanism which comprises a machine shell, a turnover plate, a driving mechanism and a reinforcing plate. The machine shell is provided with a smoke collecting cavity and a smoke inlet communicated with the smoke collecting cavity. The machine shell is provided with a top plate, a first side plate and a second side plate. The driving mechanism comprises a driving device and a transmission assembly. And the reinforcing plate is installed on the top plate and located in the smoke collecting cavity, the side edge, close to the first side plate, of the reinforcing plate is provided with a first folded edge bent downwards, and the first folded edge abuts against the inner surface of the first side plate. Wherein the driving device is rotationally mounted on the reinforcing plate. Therefore, the stress of the machine shell can be dispersed on the top plate and the first side plate, the machine shell is protected, the situation that the machine shell is deformed due to stress is reduced, the influence of deformation of the machine shell on normal work of the extractor hood is reduced, and meanwhile the influence of deformation of the machine shell on the appearance of the extractor hood is reduced. In addition, the utility model further discloses the range hood with the turnover mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of range hoods, in particular to a turning mechanism and a range hood. Background Art

[0002] The range hood generally comprises a housing, which has a smoke collecting chamber and a smoke inlet connected to the smoke collecting chamber, and a flap for opening or closing the smoke inlet is rotatably mounted at the smoke inlet. In addition, a driving device and a connecting rod assembly are also mounted on the housing, wherein the driving device is located in the smoke collecting chamber, one end of the connecting rod assembly is connected to the output end of the driving device, and the other end is connected to the flap, so that the driving device can drive the flap to rotate through the connecting rod assembly.

[0003] However, in the prior art, the entire driving device is usually installed directly on the left or right panel of the casing, but the thickness of the left and right panels of the casing is usually small, and thus they are easily deformed by force, which not only easily affects the normal operation of the range hood, but also easily affects the aesthetics of the range hood. Utility Model Content

[0004] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a flip mechanism that can reduce the deformation of the housing.

[0005] The utility model also provides a range hood equipped with the above-mentioned turning mechanism.

[0006] According to the flipping mechanism of the embodiment of the utility model, the casing has a smoke collecting chamber and a smoke inlet connected to the smoke collecting chamber, the casing has a top plate, a first side plate and a second side plate, the first side plate and the second side plate are correspondingly located on two opposite sides of the smoke collecting chamber and are connected to the top plate; a flap is movably mounted on the casing and can open or close the smoke inlet; a driving mechanism includes a driving device and a transmission assembly, the driving device is mounted in the smoke collecting chamber and is transmission-connected to the flap through the transmission assembly; a reinforcing plate is mounted on the top plate and is located in the smoke collecting chamber, and a side edge of the reinforcing plate close to the first side plate has a first folded edge bent downward, and the first folded edge abuts against the inner surface of the first side plate; wherein the driving device is rotatably mounted on the reinforcing plate.

[0007] The flipping mechanism according to the embodiment of the utility model has at least the following beneficial effects:

[0008] By providing a reinforcing plate, the reinforcing plate is installed on the top plate and abutted against the first side plate through the first folded edge, and the driving device is installed on the reinforcing plate, the force of the casing can be dispersed on the top plate and the first side plate, and the provision of the first folded edge can also increase the structural strength of the reinforcing plate, thereby protecting the casing, reducing the deformation of the casing due to force, reducing the impact of the deformation of the casing on the normal operation of the range hood, and reducing the impact of the deformation of the casing on the appearance of the range hood.

[0009] According to some embodiments of the present invention, a mounting seat is further included, wherein the mounting seat is arranged on the reinforcing plate, and the driving device is rotatably mounted on the mounting seat.

[0010] According to some embodiments of the utility model, the mounting seat has two mounting plates arranged opposite to each other, each of the mounting plates is provided with a first mounting hole, and the driving device has a mounting portion embedded between the two mounting plates, and the mounting portion is provided with a second mounting hole corresponding to the first mounting hole; it also includes a pin shaft, and the pin shaft is installed in the two first mounting holes and the second mounting hole, and a sleeve is installed between each of the mounting plates and the mounting portion and is sleeved on the pin shaft.

[0011] According to some embodiments of the present invention, the two mounting plates are formed by bending two opposite sides of the mounting seat downward.

[0012] According to some embodiments of the utility model, the transmission assembly includes a connecting rod, one end of the connecting rod has a first rotating shaft rotatably mounted on the front side wall of the smoke collecting chamber, the other end of the connecting rod is connected to the flap, the connecting rod also has a second rotating shaft rotatably connected to the output end of the driving device, the driving device can push the second rotating shaft to rotate around the first rotating shaft, and push the flap to flip to open or close the smoke inlet.

[0013] According to some embodiments of the utility model, the driving device has a telescopic push rod, and the second rotating shaft is rotatably connected to the telescopic push rod; when the flap closes the smoke inlet, the telescopic push rod is arranged in the up and down direction.

[0014] According to some embodiments of the present invention, when the flap closes the smoke inlet, a horizontal distance L1 between the first rotation axis and the second rotation axis is 16-28 mm.

[0015] According to some embodiments of the present invention, when the flap closes the smoke inlet, an angle a between a line between the first rotation axis and the second rotation axis and the up-down direction is 20-40°.

[0016] According to some embodiments of the present invention, the distance L2 between the first rotation axis and the second rotation axis is 40-50 mm.

[0017] According to the range hood of the embodiment of the utility model, a flap mechanism according to any one of the above embodiments is provided.

[0018] The range hood according to the embodiment of the utility model has at least the following beneficial effects:

[0019] By setting up a flipping mechanism of any of the above-mentioned embodiments, the flipping mechanism includes a reinforcing plate, the reinforcing plate is installed on the top plate and has a first folded edge abutting against the first side plate, and the driving device is installed on the reinforcing plate, so that the force of the casing can be dispersed on the top plate and the first side plate, thereby protecting the casing, reducing the deformation of the casing due to force, reducing the impact of the deformation of the casing on the normal operation of the range hood, and improving the service life of the range hood.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 A schematic diagram of a range hood according to an embodiment of the utility model;

[0023] Figure 2 Another schematic diagram of a range hood according to an embodiment of the utility model;

[0024] Figure 3 This is a schematic diagram of the interior of a range hood according to an embodiment of the utility model;

[0025] Figure 4 A schematic diagram of a flipping mechanism according to an embodiment of the present utility model;

[0026] Figure 5 It is a partial schematic diagram of the flipping mechanism of an embodiment of the utility model;

[0027] Figure 6 for Figure 5 A front view schematic diagram of the middle flip mechanism;

[0028] Figure 7 A schematic diagram of a reinforcement plate according to an embodiment of the present utility model;

[0029] Figure 8 Another schematic diagram of a reinforcement plate according to an embodiment of the utility model;

[0030] Fig. 9 It is a side view of the flipping mechanism of the embodiment of the utility model;

[0031] Fig.10 for Fig. 9 Partial schematic diagram of the flipping mechanism.

[0032] Reference numerals:

[0033] The casing 100, the smoke collecting chamber 101, the top plate 110, the first side plate 120, the flap 130, the driving device 140, the mounting portion 141, the telescopic push rod 142, the connecting rod 150, the first rotating shaft 151, the second rotating shaft 152, the reinforcing plate 160, the first folded edge 161, the second folded edge 162, the reinforcing rib 163, the mounting seat 170, the mounting plate 171, and the pin 180. DETAILED DESCRIPTION

[0034] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0035] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0036] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0037] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0038] Reference Figures 1 to 8One embodiment of the utility model provides a flip mechanism, which includes a housing 100, a flap 130, a driving mechanism and a reinforcing plate 160. The housing 100 has a smoke collecting chamber 101 and a smoke inlet connected to the smoke collecting chamber 101, and the housing 100 has a top plate 110, a first side plate 120 and a second side plate, and the first side plate 120 and the second side plate are correspondingly located on two opposite sides of the smoke collecting chamber 101 and connected to the top plate 110. The flap 130 is movably mounted on the housing 100 and can open or close the smoke inlet. The driving mechanism includes a driving device 140 and a transmission assembly, and the driving device 140 is installed in the smoke collecting chamber 101 and is transmission-connected to the flap 130 through the transmission assembly. The reinforcing plate 160 is mounted on the top plate 110 and is located in the smoke collecting chamber 101 . A side edge of the reinforcing plate 160 close to the first side plate 120 has a first folded edge 161 bent downward. The first folded edge 161 abuts against the inner surface of the first side plate 120 . The driving device 140 is rotatably mounted on the reinforcing plate 160 .

[0039] In the above structure, a reinforcing plate 160 is added, and a side edge of the reinforcing plate 160 close to the first side plate 120 has a first folded edge 161 bent downward. Therefore, the reinforcing plate 160 is installed on the top plate 110 and abuts against the first side plate 120 through the first folded edge 161, and the driving device 140 is installed on the reinforcing plate 160. Therefore, the force of the casing 100 can be dispersed on the top plate 110 and the first side plate 120, and the setting of the first folded edge 161 can also improve the structural strength of the reinforcing plate 160, thereby protecting the casing 100, reducing the deformation of the casing 100 caused by force, reducing the influence of the deformation of the casing 100 on the normal operation of the range hood, and reducing the influence of the deformation of the casing 100 on the appearance of the range hood.

[0040] It can be understood that the first side panel 120 and the second side panel are located on the left and right sides of the top panel 110 respectively, wherein the first side panel 120 can be located on the left side or the right side of the top panel 110, and the present invention does not make any specific limitation on this.

[0041] It is understandable that, referring to Figures 1 to 8 In order to improve the structural strength of the reinforcing plate 160, a second folded edge 162 bent downward may be provided on the other side of the reinforcing plate 160. In addition, reinforcing ribs 163 or other reinforcing structures may be provided on the reinforcing plate 160, which is not specifically limited in the present invention.

[0042] Reference Figures 3 to 6 In some embodiments, the flipping mechanism further includes a mounting seat 170 , the mounting seat 170 is disposed on the reinforcing plate 160 , and the driving device 140 is rotatably mounted on the mounting seat 170 .

[0043] In the above structure, a mounting base 170 is provided on the reinforcing plate 160, and the driving device 140 is rotatably installed on the mounting base 170. This not only facilitates the installation of the driving device 140, but also further disperses the force on the casing 100, protects the casing 100, reduces the deformation of the casing 100 caused by force, reduces the influence of the deformation of the casing 100 on the normal operation of the range hood, and reduces the influence of the deformation of the casing 100 on the appearance of the range hood.

[0044] It is understandable that the mounting seat 170 and the reinforcing plate 160 may be an integrally formed structure, thereby reducing the number of parts that need to be installed and facilitating the assembly of the range hood. In addition, the mounting seat 170 and the reinforcing plate 160 may also be a split structure, in which case the mounting seat 170 may be mounted on the reinforcing plate 160 by fasteners such as screws, or the mounting seat 170 may be mounted on the reinforcing plate 160 by a snap-on structure. In addition, the mounting seat 170 may also be mounted on the reinforcing plate 160 by welding or other methods, which is not specifically limited by the present invention.

[0045] Reference Figures 3 to 6 In some embodiments, the mounting seat 170 has two mounting plates 171 arranged opposite to each other, each mounting plate 171 has a first mounting hole, and the driving device 140 has a mounting portion 141 embedded between the two mounting plates 171, and the mounting portion 141 has a second mounting hole corresponding to the first mounting hole; it also includes a pin shaft 180, the pin shaft 180 is installed in the two first mounting holes and the second mounting hole, and a shaft sleeve mounted on the pin shaft 180 is installed between each mounting plate 171 and the mounting portion 141.

[0046] By adopting the above structure, the mounting portion 141 of the driving device 140 is embedded between the two mounting plates 171 of the mounting seat 170, and the mounting portion 141 is rotatably mounted on the two mounting plates 171 through the pin 180, thereby improving the installation stability of the driving device 140, making the installation connection between the driving device 140 and the mounting seat 170 more firm and tight. By arranging a sleeve between each mounting plate 171 and the mounting portion 141, it is possible to avoid rigid friction between the mounting portion 141 and the mounting plate 171 when the driving device 140 rotates relative to the mounting seat 170, thereby reducing the friction noise between metals and improving the user's experience. In addition, the structure can also protect the mounting portion 141 and the mounting plate 171 to avoid scratches or wear between the two due to friction. Thus, the connection stability between the driving device 140 and the mounting seat 170 can be guaranteed.

[0047] It can be understood that in order to better protect the mounting portion 141, the sleeve can extend into the second mounting hole of the mounting portion 141, thereby avoiding rigid friction between the hole wall of the second mounting hole and the outer wall of the pin shaft 180, thereby reducing the friction noise between the metals and improving the user experience. In addition, the structure can also protect the mounting portion 141 and the pin shaft 180 to avoid scratches or wear between the two due to friction, thereby ensuring the connection stability between the drive device 140 and the mounting seat 170.

[0048] It is understandable that the shaft sleeve is specifically made of plastic, and specifically, the shaft sleeve can be made of nylon.

[0049] It is understandable that in order to further improve the connection stability between the driving device 140 and the mounting seat 170, in some embodiments, one end of the pin shaft 180 has an end cap abutting against the connecting plate, and the other end is installed with an R-shaped cotter pin.

[0050] Reference Figures 3 to 6 In some embodiments, the two mounting plates 171 are formed by bending the two opposite sides of the mounting seat 170 downward.

[0051] By adopting the above-mentioned structure, the structural strength of the mounting base 170 can be further increased, and the installation stability of the driving device 140 can be further improved, thereby better protecting the casing 100, reducing the stress deformation of the casing 100, reducing the impact of the deformation of the casing 100 on the normal operation of the range hood, and reducing the impact of the deformation of the casing 100 on the appearance of the range hood.

[0052] Reference Figures 3 to 10 In some embodiments, the transmission assembly includes a connecting rod 150, one end of which has a first rotating shaft 151 rotatably mounted on the front side wall of the smoke collecting chamber 101, and the other end of the connecting rod 150 is connected to the flap 130. The connecting rod 150 also has a second rotating shaft 152 rotatably connected to the output end of the driving device 140. The driving device 140 can push the second rotating shaft 152 to rotate around the first rotating shaft 151 and push the flap 130 to flip and open or close the smoke inlet.

[0053] In the above structure, the driving device 140 can drive the connecting rod 150 to rotate around the first rotating shaft 151, thereby driving the flap 130 to flip relative to the casing 100 to open or close the smoke inlet. The structure is simple and the linkage is good, making the opening and closing of the flap 130 more stable and reliable.

[0054] Reference Figures 3 to 10 In some embodiments, the driving device 140 has a telescopic push rod 142, and the second rotating shaft 152 is rotatably connected to the telescopic push rod 142; when the flap 130 closes the smoke inlet, the telescopic push rod 142 is arranged in the up and down direction.

[0055] By adopting the above structure, the telescopic push rod 142 is arranged in the up-down direction, thereby saving the space occupied by the driving device 140 in the smoke collecting chamber 101, and also facilitating the driving rod 150 to rotate around the first rotating shaft 151, so that the opening and closing of the flap 130 is more stable and reliable.

[0056] The stable operation of the driving mechanism is closely related to the parameter setting of the horizontal distance L1 between the first rotating shaft 151 and the second rotating shaft 152. If L1 is too small, it is easy to cause the driving device 140 to require a large thrust to drive the connecting rod 150 to drive the flap 130 to flip around the first rotating shaft 151. That is, the working current of the driving device 140 is high, and the thrust loss is large. Long-term use of high current load will cause the thrust of the driving device 140 to decay, and the service life will be greatly shortened, which will easily affect the service life of the entire range hood. For this reason, refer to Figures 3 to 10 In some embodiments of the present invention, when the flap 130 closes the smoke inlet, the horizontal distance L1 between the first rotation axis 151 and the second rotation axis 152 is 16-28 mm.

[0057] By adopting the above structure, the horizontal distance L1 between the first rotating shaft 151 and the second rotating shaft 152 is set between 16-28 mm, so that L1 is within a reasonable range, thereby reducing the thrust loss of the drive device 140 when it is working, reducing the working current of the drive device 140, thereby protecting the drive device 140 and increasing the service life of the drive device 140.

[0058] Preferably, in some embodiments, the horizontal distance L1 between the first rotation axis 151 and the second rotation axis 152 can be specifically set to 21.5 mm. Of course, in addition to this, the horizontal distance L1 between the first rotation axis 151 and the second rotation axis 152 can also be set to 16 mm, 20 mm, 24 mm, 28 mm, etc., which is not specifically limited in the present invention.

[0059] It should be noted that the stable operation of the driving mechanism is related not only to the horizontal distance L1 between the first rotating shaft 151 and the second rotating shaft 152, but also to the angle a between the connecting line between the first rotating shaft 151 and the second rotating shaft 152 and the vertical direction. If the angle a is too small, it is easy to cause the driving mechanism to form a dead point during operation, resulting in operation jamming, which can easily cause quality problems of the range hood. Figures 3 to 10 In some embodiments of the present invention, when the flap 130 closes the smoke inlet, the angle a between the line between the first rotation axis 151 and the second rotation axis 152 and the up-down direction is 20-40°.

[0060] By adopting the above structure, the angle a between the line connecting the first rotating shaft 151 and the second rotating shaft 152 and the up and down direction is set between 20-40°, so that the angle a is within a reasonable range, thereby avoiding undesirable phenomena such as running jams or jamming of the driving mechanism during operation.

[0061] Preferably, in some embodiments, the angle a between the line connecting the first rotation axis 151 and the second rotation axis 152 and the up-down direction can be specifically set to 30°. Of course, in addition to this, the angle a between the line connecting the first rotation axis 151 and the second rotation axis 152 and the up-down direction can also be set to 20°, 25°, 35°, 40°, etc., which is not specifically limited in the present invention.

[0062] It can be understood that the stable operation of the driving mechanism is related to the setting of two parameters, namely, the horizontal distance L1 between the first rotating shaft 151 and the second rotating shaft 152 and the angle a between the line between the first rotating shaft 151 and the second rotating shaft 152 and the up-down direction, and also to the distance L2 between the first rotating shaft 151 and the second rotating shaft 152. Specifically, if L2 is too small, the lever of the driving mechanism will be relatively large during operation, which will lead to a large thrust loss of the driving device 140. Long-term use will cause the thrust of the driving device 140 to decay significantly, seriously affecting the service life of the driving device 140. For this reason, in some embodiments of the utility model, the distance L2 between the first rotating shaft 151 and the second rotating shaft 152 is 40-50 mm.

[0063] By adopting the above structure, the distance L2 between the first rotating shaft 151 and the second rotating shaft 152 is set between 40-50 mm, so that L2 is within a reasonable range, thereby reducing the lever ratio during the operation of the driving mechanism and reducing the thrust loss of the driving device 140, thereby reducing the working current of the driving device 140, thereby protecting the driving device 140 and increasing the service life of the driving device 140.

[0064] Preferably, in some embodiments, the distance L2 between the first rotation axis 151 and the second rotation axis 152 can be specifically set to 44 mm. Of course, in addition to this, the distance L2 between the first rotation axis 151 and the second rotation axis 152 can also be set to 10 mm, 45 mm, 48 mm, 50 mm, etc., which is not specifically limited in the present invention.

[0065] Reference Figures 1 to 4 An embodiment of the utility model further provides a range hood, which is provided with the flip mechanism of any of the above embodiments.

[0066] In the above structure, by setting a flipping mechanism of any of the above embodiments, the flipping mechanism includes a reinforcing plate 160, the reinforcing plate 160 is installed on the top plate 110 and has a first folded edge 161 abutting against the first side plate 120, and the driving device 140 is installed on the reinforcing plate 160, so that the force of the casing 100 can be dispersed on the top plate 110 and the first side plate 120, thereby protecting the casing 100, reducing the deformation of the casing 100 due to force, reducing the influence of the deformation of the casing 100 on the normal operation of the range hood, and improving the service life of the range hood.

[0067] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. The turning mechanism is characterized in that: include: A housing (100) having a smoke collecting chamber (101) and a smoke inlet connected to the smoke collecting chamber (101), the housing (100) having a top plate (110), a first side plate (120) and a second side plate, the first side plate (120) and the second side plate being respectively located on two opposite sides of the smoke collecting chamber (101) and connected to the top plate (110); A flap (130) movably mounted on the housing (100) and capable of opening or closing the smoke inlet; A driving mechanism, comprising a driving device (140) and a transmission assembly, wherein the driving device (140) is installed in the smoke collecting chamber (101) and is transmission-connected to the flap (130) via the transmission assembly; a reinforcing plate (160) mounted on the top plate (110) and located in the smoke collecting chamber (101); a side edge of the reinforcing plate (160) close to the first side plate (120) having a first folded edge (161) bent downward, the first folded edge (161) abutting against an inner surface of the first side plate (120); Wherein, the driving device (140) is rotatably mounted on the reinforcing plate (160).

2. The turning mechanism according to claim 1, characterized in that: It also includes a mounting seat (170), wherein the mounting seat (170) is arranged on the reinforcing plate (160), and the driving device (140) is rotatably mounted on the mounting seat (170).

3. The turning mechanism according to claim 2, characterized in that: The mounting seat (170) has two mounting plates (171) arranged opposite to each other, each of the mounting plates (171) is provided with a first mounting hole, and the driving device (140) has a mounting portion (141) embedded between the two mounting plates (171), and the mounting portion (141) is provided with a second mounting hole corresponding to the first mounting hole; It also includes a pin shaft (180), the pin shaft (180) is installed in the two first mounting holes and the second mounting hole, and a shaft sleeve sleeved on the pin shaft (180) is installed between each mounting plate (171) and the mounting portion (141).

4. The turning mechanism according to claim 3, characterized in that: The two mounting plates (171) are formed by bending the two opposite sides of the mounting seat (170) downwards.

5. The turning mechanism according to claim 1, characterized in that: The transmission assembly comprises a connecting rod (150), one end of the connecting rod (150) having a first rotating shaft (151) rotatably mounted on the front side wall of the smoke collecting chamber (101), the other end of the connecting rod (150) being connected to the flap (130), the connecting rod (150) also having a second rotating shaft (152) rotatably connected to the output end of the driving device (140), the driving device (140) being capable of driving the second rotating shaft (152) to rotate around the first rotating shaft (151), and driving the flap (130) to flip over to open or close the smoke inlet.

6. The turning mechanism according to claim 5, characterized in that: The driving device (140) comprises a telescopic push rod (142), and the second rotating shaft (152) is rotatably connected to the telescopic push rod (142); When the flap (130) closes the smoke inlet, the telescopic push rod (142) is arranged in the up-down direction.

7. The turning mechanism according to claim 6, characterized in that: When the flap (130) closes the smoke inlet, a horizontal distance L1 between the first rotating shaft (151) and the second rotating shaft (152) is 16-28 mm.

8. The turning mechanism according to claim 6, characterized in that: When the flap (130) closes the smoke inlet, the angle a between the line connecting the first rotating axis (151) and the second rotating axis (152) and the up-down direction is 20-40°.

9. The turning mechanism according to claim 6, characterized in that: The distance L2 between the first rotating axis (151) and the second rotating axis (152) is 40-50 mm.

10. A range hood, characterized in that: A turning mechanism according to any one of claims 1 to 9 is provided.

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