Quick disassembly and assembly component and range hood

Abstract

The present invention discloses a quick disassembly and assembly component and a range hood. The quick disassembly and assembly component includes a first elastic member, a connecting pin, and a second elastic member. The first elastic member is in a C shape, and there is a gap A between the two ends of the first elastic member. One end of the connecting pin is provided with a head, and the other end is provided with a radially extending flat head. When the flat head penetrates into the gap A, the two ends of the first elastic member jointly limit the extraction of the flat head. When the connecting pin is rotated 90 degrees, the flat head can be freely extracted. The second elastic member is installed on the connecting pin to reset the rotation of the connecting pin.

Description

Technical Field

[0001] The present invention relates to the technical field of accessories for range hoods, and particularly to a quick disassembly and assembly component and a range hood. Background Art

[0002] When the oil mesh of an existing range hood is connected to the smoke collecting hood, a quick disassembly and assembly component is required. For example, the patent with publication number CN204006239U discloses a quick disassembly and assembly structure for the oil mesh of a range hood. Among them, a fixing pin is inserted through a quick-release screw, and a long through hole that can just allow the fixing pin to pass through is opened on the support plate. During installation, it is necessary to first rotate the quick-release screw to align the fixing pin with the long through hole, then pass the fixing pin through the long through hole, and finally continue to rotate the quick-release screw to misalign the fixing pin with the long through hole. The existing solution has the problem that the alignment is not easy to control. For example, if the alignment is not neat, the fixing pin cannot pass through the long through hole, and it is necessary to rotate and adjust the quick-release screw again, resulting in inconvenient operation. Summary of the Invention

[0003] The purpose of the present invention is to provide a quick disassembly and assembly component and a range hood, and its advantage is that clamping can be achieved without rotational alignment.

[0004] A quick disassembly and assembly component of the present invention includes a first elastic member, a connecting pin, and a second elastic member. The first elastic member is in a C shape, and there is a gap A between the two ends of the first elastic member. One end of the connecting pin is provided with a head, and the other end is provided with a radially extending flat head. When the flat head penetrates into the gap A, the two ends of the first elastic member jointly limit the extraction of the flat head. When the connecting pin is rotated 90 degrees, the flat head can be freely extracted. The second elastic member is installed on the connecting pin to reset the rotation of the connecting pin.

[0005] Preferably or optionally, the first elastic member includes a first U-shaped rod, a second U-shaped rod, and a connecting portion. The upper end of the first U-shaped rod is fixedly connected to one end of the connecting portion at an angle, and the upper end of the second U-shaped rod is fixedly connected to the other end of the connecting portion at an angle. And the first lower end rod of the first U-shaped rod is parallel to the second lower end rod of the second U-shaped rod. The first U-shaped rod, the second U-shaped rod, and the connecting portion jointly form a C shape, and there is a gap A between the first lower end rod and the second lower end rod.

[0006] Preferably or optionally, the length of the flat head is B, the width is C, and the size relationship of A, B, and C is B > A > C. The length of the flat head gradually decreases in the axial direction and away from the head.

[0007] Preferably or optionally, the length of the first radial direction of the pin body of the connecting pin in the same direction as the length direction of the flat head is D, and the length of the second radial direction of the connecting pin in the same direction as the width direction of the flat head is E. The size relationship among A, B, C, D, and E is B > D > A > E ≥ C, so that when the flat head penetrates into the gap A, the first lower rod and the second lower rod jointly clamp the pin body of the connecting pin.

[0008] Preferably or optionally, the second elastic member is a flat spiral spring. A first straight arm is provided at the central part of the second elastic member, and a second straight arm is tangentially extended from the second elastic member. A first through groove extending towards the head direction is formed on the flat head. The second elastic member is sleeved on the pin body of the connecting pin, and the first straight arm is inserted into the first through groove. The second straight arm is configured to prevent the whole rotation of the second elastic member.

[0009] Preferably or optionally, it further includes a C-shaped snap ring. An annular groove is formed between the head and the first through groove, and a part of the C-shaped snap ring is clamped on the annular groove.

[0010] Preferably or optionally, the connecting part includes a first connecting rod and a second connecting rod. One end of the first connecting rod is fixedly connected to the first side rod of the first U-shaped rod, and the other end is fixedly connected to the first side rod of the second U-shaped rod. One end of the second connecting rod is fixedly connected to the second side rod of the first U-shaped rod, and the other end is fixedly connected to the second side rod of the second U-shaped rod. And the first connecting rod and the second connecting rod are parallel to each other.

[0011] The present invention further provides an oil fume extractor, which includes a smoke collecting hood, an oil mesh, and at least one of the above-mentioned quick disassembly and assembly components. An annular installation part is formed on the top wall of the smoke collecting cavity of the smoke collecting hood around the air inlet. A first hanging part is provided on the bottom wall of one end of the annular installation part. A sunken groove is formed on the bottom wall of the other end of the annular installation part. The first elastic member is installed in the sunken groove. One end of the oil mesh is provided with a second hanging part that is rotatably hung on the first hanging part. A through hole opposite to the first elastic member is formed at the other end of the oil mesh. A limiting part is arranged at a position adjacent to the through hole on the inner side surface of the oil mesh. The connecting pin is rotatably inserted through the through hole and is detachably connected to the first elastic member. One end of the second elastic member is connected to the limiting part.

[0012] Preferably or optionally, it further includes a C-shaped snap ring. An annular groove is formed between the head and the first through groove, and a part of the C-shaped snap ring is clamped on the annular groove and the oil mesh is located between the head and the C-shaped snap ring. The head and the C-shaped snap ring are respectively abutted against the inner and outer side surfaces of the oil mesh.

[0013] Preferably or optionally, the limiting part is a lug with a limiting hole, the second elastic member is a flat spiral spring, a first straight arm is arranged at the center of the second elastic member, a second straight arm is arranged tangentially extending from the second elastic member, a first through groove extending towards the head direction is formed in the flat head, the second elastic member is sleeved on the pin body of the connecting pin, and the first straight arm is inserted into the first through groove, and the second straight arm is inserted into the limiting hole of the limiting part.

[0014] The advantages of a quick disassembly and assembly component and a range hood of the present invention compared with the prior art are as follows: clamping can be achieved without rotational alignment, thereby improving the disassembly and assembly efficiency. Since the connecting pin automatically rotates and resets after rotational disassembly, the convenience of operation is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a split schematic diagram of a quick disassembly and assembly component of the present invention.

[0016] Figure 2 is a state schematic diagram after the connecting pin of a quick disassembly and assembly component of the present invention is clamped with the first elastic member.

[0017] Figure 3 is a side view schematic diagram of the first elastic member of a quick disassembly and assembly component of the present invention.

[0018] Figure 4 is a side view schematic diagram of the connecting pin of a quick disassembly and assembly component of the present invention.

[0019] Figure 5 is Figure 4 a state schematic diagram after the connecting pin in

[0020] Figure 6 is a split schematic diagram of a range hood of the present invention.

[0021] Figure 7 is another split schematic diagram of a range hood of the present invention.

[0022] Figure 8 is Figure 7 an enlarged view of part G of

[0023] Figure 9 is Figure 7 an enlarged view of part H of

[0024] Fig.10 is an inner side view schematic diagram of the oil net of a range hood of the present invention.

[0025] Figure 11 is Fig.10 a partial enlarged view of

[0026] Fig.12Schematic side view of a range hood according to the present invention.

[0027] Figure 13 Schematic cross-sectional view of a range hood according to the present invention.

[0028] Fig.14 is Figure 13 Partial enlarged schematic view of

[0029] Illustration of figure numbers

[0030] 1. First elastic member; 11. First U-shaped rod; 111. First lower end rod; 12. Second U-shaped rod; 121. Second lower end rod; 13. Connecting portion; 131. First connecting rod; 132. Second connecting rod;

[0031] 2. Connecting pin; 21. Head; 211. Second through groove; 22. Flat head; 23. First through groove; 24. Annular groove;

[0032] 3. Second elastic member; 31. First straight arm; 32. Second straight arm;

[0033] 4. C-shaped snap ring;

[0034] 5. Smoke collecting hood; 51. Top wall; 52. Annular mounting portion; 53. First hanging portion; 54. Sunk groove; 6. Oil net; 61. Second hanging portion; 62. Through hole; 63. Limiting portion. Detailed implementation manners

[0035] The following further describes in detail a quick disassembly and assembly component and a range hood of the present invention with reference to the Figures 1 to 14 accompanying drawings.

[0036] For a quick disassembly and assembly component of the present invention, please refer to Figures 1 to 14 the relevant figures, including a first elastic member 1, a connecting pin 2, and a second elastic member 3.

[0037] The first elastic member 1 is in a C shape, and there is a gap A between the two ends of the first elastic member 1. Preferably, the material of the first elastic member 1 is spring steel.

[0038] One end of the connecting pin 2 is provided with a head 21, and the other end is provided with a radially extending flat head 22. When the flat head 22 penetrates into the gap A, the two ends of the first elastic member 1 jointly limit the extraction of the flat head 22.

[0039] For example, when the I-shaped clamp 22 is passing upward into the gap A, the two side surfaces of the I-shaped clamp 22 respectively abut against the two ends of the first elastic member 1 and expand the gap. After the I-shaped clamp 22 passes into the gap, the two ends of the first elastic member 1 return to the gap A. At this time, the lower end surface of the I-shaped clamp 22 abuts against the two ends of the first elastic member 1, and the two ends of the first elastic member 1 limit the downward withdrawal of the I-shaped clamp 22, thereby achieving no need for rotation and alignment, thereby improving installation efficiency and usage experience.

[0040] When the connecting pin 2 is rotated 90 degrees, the straight-shaped clamping head 22 can be freely pulled out. For example, after the connecting pin 2 is rotated 90 degrees, the lower end surface of the straight-shaped clamping head 22 is out of contact with the two ends of the first elastic member 1.

[0041] The second elastic member 3 is installed on the connecting pin 2 to automatically reverse and reset the rotation of the connecting pin 2, so that when the connecting pin 2 is clamped with the first elastic member 1, there is no need to rotate the clamping head 22 to align the connecting pin 2 and the first elastic member 1, thereby improving the disassembly and assembly efficiency.

[0042] A quick disassembly assembly of the present invention, please refer to Figures 1 to 14 The relevant figures can also be based on the previous technical solution: the first elastic member 1 includes a first U-shaped rod 11, a second U-shaped rod 12 and a connecting portion 13, and preferably the first U-shaped rod 11, the second U-shaped rod 12 and the connecting portion 13 are all made of spring steel.

[0043] The upper end of the first U-shaped rod 11 is fixedly connected to one end of the connecting portion 13 at an angle, and the angle between the first U-shaped rod 11 and the one end of the connecting portion 13 is a first angle.

[0044] The upper end of the second U-shaped rod 12 is fixedly connected to the other end of the connecting portion 13 at an angle, and the first lower end rod 111 of the first U-shaped rod 11 is parallel to the second lower end rod 121 of the second U-shaped rod 12. The first U-shaped rod 11, the second U-shaped rod 12, and the connecting portion 13 together form a C-shape, with a gap A between the first lower end rod 111 and the second lower end rod 121. The angle between the second U-shaped rod 12 and one end of the connecting portion 13 is a second angle, preferably the same as the first angle and ranging from 30 to 90 degrees. When the first elastic member 1 is subjected to an external force, the angles of the first and second angles will change. When the external force stabilizes, the first and second angles will return to their original values.

[0045] When the I-shaped clamping head 22 passes through A, the two side surfaces in the length direction of the I-shaped clamping head 22 rub against the first lower end rod 111 and the second lower end rod 121 respectively to expand the gap between the first lower end rod 111 and the second lower end rod 121, so as to enable the I-shaped clamping head 22 to pass through the gap A without the need for rotation and alignment.

[0046] After the flat - shaped chuck 22 passes through the gap A, the first lower end rod 111 and the second lower end rod 121 reset and jointly limit the pulling - out direction of the flat - shaped chuck 22, completing the clamping connection.

[0047] When the connecting pin 2 rotates by ninety degrees, since the gap A is greater than the length C at both ends in the width direction of the flat - shaped chuck 22, the flat - shaped chuck 22 can be freely pulled out.

[0048] For a quick - disassembly and assembly component of the present invention, please refer to Figures 1 to 14 the relevant figures. On the basis of the previous technical solutions, it can also be: the length of the flat - shaped chuck 22 is B, and the width is C.

[0049] The size relationship of A, B, and C is B > A > C, and the length of the flat - shaped chuck 22 tapers in the axial direction and away from the head 21. For example, the extension lines of the two side edges in the length direction of the flat - shaped chuck 22 can intersect.

[0050] For a quick - disassembly and assembly component of the present invention, please refer to Figures 1 to 14 the relevant figures. On the basis of the previous technical solutions, it can also be: the length of the pin body of the connecting pin 2 in the first radial direction in the same direction as the length direction of the flat - shaped chuck 22 is D, and the length of the connecting pin 2 in the second radial direction in the same direction as the width direction of the flat - shaped chuck 22 is E.

[0051] The size relationship of A, B, C, D, and E is B > D > A > E ≥ C, so that when the flat - shaped chuck 22 passes through the gap A, the first lower end rod 111 and the second lower end rod 121 jointly clamp the pin body of the connecting pin 2, so that when the flat - shaped chuck 22 passes through A, the first lower end rod 111 and the second lower end rod 121 jointly clamp the pin body of the connecting pin 2, preventing noise generated by vibration during startup.

[0052] For a quick - disassembly and assembly component of the present invention, please refer to Figures 1 to 14 the relevant figures. On the basis of the previous technical solutions, it can also be: the second elastic member 3 is a flat spiral spring. A first straight arm 31 is provided at the central part of the second elastic member 3, and a second straight arm 32 is tangentially extended from the second elastic member 3. A first through - slot 23 extending towards the head 21 is opened on the flat - shaped chuck 22. The second elastic member 3 is sleeved on the pin body of the connecting pin 2, and the first straight arm 31 is inserted into the first through - slot 23, and the second straight arm 32 is configured to prevent the second elastic member 3 from rotating as a whole.

[0053] Of course, the second elastic member 3 is not limited to being a flat spiral spring, and those skilled in the art can select other types of torsion springs according to actual needs.

[0054] For a quick - disassembly and assembly component of the present invention, please refer to Figures 1 to 14With reference to the related drawings, on the basis of the foregoing technical solutions, it may further be: It further includes a C-shaped retaining ring 4. An annular groove 24 is formed between the head 21 and the first through groove 23. A part of the C-shaped retaining ring 4 is clamped on the annular groove 24.

[0055] For example, the first elastic member 1 is installed on the first component, the connecting pin 2 is passed through the second component, and the second component is located between the head 21 and the C-shaped retaining ring 4. The head 21 and the C-shaped retaining ring 4 are respectively abutted against the two side surfaces of the second component, so as to rotatably fix the connecting pin 2 on the second component and prevent the connecting pin 2 from falling off, without repeatedly passing the connecting pin 2 through the second component, thereby further improving the disassembly and assembly efficiency of the second component and the first component.

[0056] There is a gap of 1-30 mm between the C-shaped retaining ring 4 and the head 21. Of course, the gap between the C-shaped retaining ring 4 and the head 21 is not limited to 1-30 mm. Those skilled in the art can select the gap between the C-shaped retaining ring 4 and the head 21 according to the actual thickness of the second component.

[0057] The head 21 is provided with a second through groove 211, and the second through groove 211 is configured to allow a tool to rotate the insertion part of the head 21. For example, when it is necessary to rotate the connecting pin 2, a screwdriver or chopsticks is inserted into the second through groove 211 to apply torque to the connecting pin 2. The second through groove 211 is any one of a straight groove, a cross groove, and a polygonal groove.

[0058] For a quick disassembly and assembly component of the present invention, please refer to Figures 1 to 14 With reference to the related drawings, on the basis of the foregoing technical solutions, it may further be: The connecting portion 13 includes a first connecting rod 131 and a second connecting rod 132.

[0059] One end of the first connecting rod 131 is fixedly connected to the first side rod of the first U-shaped rod 11, and the other end is fixedly connected to the first side rod of the second U-shaped rod 12.

[0060] One end of the second connecting rod 132 is fixedly connected to the second side rod of the first U-shaped rod 11, and the other end is fixedly connected to the second side rod of the second U-shaped rod 12, and the first connecting rod 131 and the second connecting rod 132 are parallel to each other.

[0061] Preferably, the first connecting rod 131, the second connecting rod 132, the first U-shaped rod 11 and the second U-shaped rod 12 are integrally formed, and the integral formation has the effects of high structural strength and convenient manufacturing.

[0062] Of course, the connecting portion 13 is not limited to being formed by the first connecting rod 131 and the second connecting rod 132. The connecting portion 13 may also be a sheet-like plate member. Those skilled in the art can select the formation method of the connecting portion 13 according to actual needs.

[0063] The present invention further provides an oil fume extractor, which includes a smoke collecting hood 5, an oil mesh 6, and at least one of the above-mentioned quick disassembly and assembly components. As Figure 6 , Figure 7 and Fig.10 shown, there are two quick disassembly and assembly components in this embodiment. Of course, the number of quick disassembly and assembly components of an oil fume extractor of the present invention is not limited to two, and those skilled in the art can select the number of quick disassembly and assembly components according to actual needs.

[0064] The top wall 51 of the smoke collecting cavity of the smoke collecting hood 5 is provided with an annular installation part 52 around the air inlet. The bottom wall of one end of the annular installation part 52 is provided with a first hanging part 53, and the bottom wall of the other end of the annular installation part 52 is provided with a sunk groove 54, and the first elastic member 1 is installed in the sunk groove 54.

[0065] One end of the oil mesh 6 is provided with a second hanging part 61 that is rotatably hung on the first hanging part 53. The other end of the oil mesh 6 is provided with a through hole 62 opposite to the first elastic member 1, and a limiting part 63 is arranged at a position adjacent to the through hole 62 on the inner side surface of the oil mesh 6.

[0066] The connecting pin 2 of the quick disassembly and assembly component is rotatably inserted through the through hole 62 and is detachably connected to the first elastic member 1. One end of the second elastic member 3 is connected to the limiting part 63.

[0067] The clamping connection can be realized without rotation and alignment. When disassembling, only need to rotate the connecting pin 2 through the head 21 until the connecting pin 2 can be pulled out, so as to improve the disassembly and assembly efficiency of the oil mesh 6.

[0068] An oil fume extractor of the present invention, please refer to Figures 1 to 14 the relevant figures. On the basis of the previous technical solutions, it can also be: further including a C-shaped retaining ring 4.

[0069] An annular groove 24 is provided between the head 21 and the first through groove 23. A part of the C-shaped retaining ring 4 is clamped on the annular groove 24 and the oil mesh 6 is located between the head 21 and the C-shaped retaining ring 4. The head 21 and the C-shaped retaining ring 4 are respectively in contact with the inner and outer side surfaces of the oil mesh 6, so as to rotatably fix the connecting pin 2 on the oil mesh 6 and prevent the connecting pin 2 from falling off, and there is no need to repeatedly insert the connecting pin 2 through the oil mesh 6, thereby further improving the disassembly and assembly efficiency of the oil mesh 6.

[0070] An oil fume extractor of the present invention, please refer to Figures 1 to 14 the relevant figures. On the basis of the previous technical solutions, it can also be: the limiting part 63 is a lug with a limiting hole. For example, the lug is n-shaped.

[0071] The second elastic member 3 is a flat spiral spring. A first straight arm 31 is provided at the central part of the second elastic member 3, and a second straight arm 32 is tangentially extended from the second elastic member 3. A first through groove 23 extending towards the head 21 is formed in the flat head chuck 22. The second elastic member 3 is sleeved on the pin body of the connecting pin 2, and the first straight arm 31 is inserted into the first through groove 23, and the second straight arm 32 is inserted into the limiting hole of the limiting part 63 to prevent the whole rotation of the second elastic member 3, so as to realize the automatic reset of the connecting pin 2 without manual rotation, thereby further improving the operation convenience.

[0072] Certainly, the quick disassembly and assembly component of the present invention is not limited to be applied to the range hood device, and can also be applied to other devices that need to quickly disassemble and assemble components.

[0073] The above only illustrates several specific embodiments of the present invention, but cannot be used as the protection scope of the present invention. Any equivalent changes, modifications, equal-proportion enlargements or reductions made according to the design spirit of the present invention shall be considered to fall within the protection scope of the present invention.

Claims

1. A quick-disassembly and assembly component, characterized in that, Comprising: A first elastic member (1), the first elastic member (1) being in a C shape, having a gap A between two ends of the first elastic member (1), A connecting pin (2), one end of the connecting pin (2) being provided with a head (21), the other end being provided with a radially extending flat head (22). When the flat head (22) penetrates into the gap A, two ends of the first elastic member (1) jointly limit the extraction of the flat head (22). When the connecting pin (2) is rotated by 90 degrees, the flat head (22) can be freely extracted, and A second elastic member (3), mounted on the connecting pin (2) to reset the rotation of the connecting pin (2); The first elastic member (1) includes a first U-shaped rod (11), a second U-shaped rod (12) and a connecting portion (13). The upper end of the first U-shaped rod (11) is fixedly connected to one end of the connecting portion (13) at an angle. The upper end of the second U-shaped rod (12) is fixedly connected to the other end of the connecting portion (13) at an angle. And a first lower end rod (111) of the first U-shaped rod (11) is parallel to a second lower end rod (121) of the second U-shaped rod (12). The first U-shaped rod (11), the second U-shaped rod (12) and the connecting portion (13) jointly form a C shape, and there is a gap A between the first lower end rod (111) and the second lower end rod (121); The flat head (22) has a length of B and a width of C; A length of a first radial direction of the pin body of the connecting pin (2) in the same direction as the length direction of the flat head (22) is D, and a length of a second radial direction of the connecting pin (2) in the same direction as the width direction of the flat head (22) is E. The size relationship of A, B, C, D, E is B > D > A > E ≥ C, so that when the flat head (22) penetrates into the gap A, the first lower end rod (111) and the second lower end rod (121) jointly clamp the pin body of the connecting pin (2); The material of the first elastic member (1) is spring steel material.

2. The quick disassembly and assembly component according to claim 1, wherein The size relationship of A, B, C is B > A > C, and the length of the flat head (22) tapers in the axial direction and away from the head (21).

3. The quick-disassembly and assembly component according to claim 1, characterized in that, The second elastic member (3) is a flat spiral spring. A first straight arm (31) is provided at the center of the second elastic member (3). A second straight arm (32) is tangentially extended from the second elastic member (3). A first through groove (23) extending in the direction of the head (21) is formed on the flat head (22). The second elastic member (3) is sleeved on the pin body of the connecting pin (2), and the first straight arm (31) is inserted into the first through groove (23), and the second straight arm (32) is configured to prevent the second elastic member (3) from rotating as a whole.

4. The quick disassembly and assembly component according to claim 3, wherein, Further comprising a C-shaped snap ring (4), an annular groove (24) is formed between the head (21) and the first through groove (23), and a part of the C-shaped snap ring (4) is clamped on the annular groove (24).

5. The quick-disassembly and assembly component according to claim 1, characterized in that The connecting part (13) includes a first connecting rod (131) and a second connecting rod (132). One end of the first connecting rod (131) is fixedly connected to the first side rod of the first U-shaped rod (11), and the other end is fixedly connected to the first side rod of the second U-shaped rod (12). One end of the second connecting rod (132) is fixedly connected to the second side rod of the first U-shaped rod (11), and the other end is fixedly connected to the second side rod of the second U-shaped rod (12), and the first connecting rod (131) and the second connecting rod (132) are parallel to each other.

6. An oil fume suction machine, characterized in that, It includes a smoke collecting hood (5), an oil net (6) and at least one quick disassembly and assembly component according to any one of claims 1-5. The top wall (51) of the smoke collecting cavity of the smoke collecting hood (5) is provided with an annular mounting part (52) around the air inlet. The bottom wall of one end of the annular mounting part (52) is provided with a first hanging part (53). A sunken groove (54) is opened on the bottom wall of the other end of the annular mounting part (52). The first elastic member (1) is installed in the sunken groove (54). One end of the oil net (6) is provided with a second hanging part (61) that is rotatably hung on the first hanging part (53). A through hole (62) opposite to the first elastic member (1) is opened at the other end of the oil net (6). A limiting part (63) is arranged at a position adjacent to the through hole (62) on the inner side surface of the oil net (6). The connecting pin (2) is rotatably inserted through the through hole (62) and is detachably connected to the first elastic member (1). One end of the second elastic member (3) is connected to the limiting part (63).

7. The range hood according to claim 6, characterized in that, It further includes a C-shaped retaining ring (4). An annular groove (24) is opened between the head (21) and the flat head (22). A part of the C-shaped retaining ring (4) is clamped on the annular groove (24) and the oil net (6) is located between the head (21) and the C-shaped retaining ring (4). The head (21) and the C-shaped retaining ring (4) are respectively in contact with the outer and inner side surfaces of the oil net (6).

8. The range hood according to claim 7, wherein, The limiting part (63) is a lug with a limiting hole. The second elastic member (3) is a flat spiral spring. A first straight arm (31) is arranged at the center of the second elastic member (3). A second straight arm (32) is tangentially extended from the second elastic member (3). A first through groove (23) extending in the direction of the head (21) is opened on the flat head (22). The second elastic member (3) is sleeved on the pin body of the connecting pin (2), and the first straight arm (31) is inserted into the first through groove (23), and the second straight arm (32) is inserted into the limiting hole of the limiting part (63).

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