Exhaust switch structure of range hood

Abstract

The utility model discloses an exhaust switch structure of a smoke exhaust ventilator, which relates to the field of smoke exhaust ventilators and comprises a smoke exhaust port mounting frame, a switch mounting ring, a switch and a switch, the hinge plate is connected with the inner side wall of the switch mounting ring through a hinge plate rotating shaft; the connecting ring comprises a first connecting ring on the lower side and a second connecting ring on the upper side, the first connecting ring is arranged on the outer side of the switch mounting ring in a sleeving mode, and an air pipe is connected to the outer side of the second connecting ring in a sleeving mode; the smoke outlet mounting frame is connected with the air pipe through the connecting ring, so that the air pipe is more convenient to connect, and the air pipe is sleeved on the outer side of the second connecting ring of the connecting ring, so that when the hinge plate is turned over, the hinge plate is separated by the second connecting ring and does not hit an air pipe heat insulation layer in the air pipe, the air pipe heat insulation layer is ensured not to be damaged, and the heat insulation effect on oil smoke is kept.

Description

Technical Field

[0001] This utility model relates to the field of range hoods, and in particular to a range hood exhaust switch structure. Background Technology

[0002] Range hoods require ductwork connecting their exhaust vents to a common exhaust vent to remove cooking fumes. Because these fumes are quite hot, an insulation layer is needed inside the ductwork. To protect the range hood from foreign objects entering the exhaust vent, an exhaust switch is installed on the vent; when not venting, this switch seals the exhaust vent.

[0003] However, in practice, because the ductwork is flexible, it is often in a bent state. When the exhaust vent's control panel is opened outwards, it can easily hit the insulation layer inside the duct. After prolonged operation, the insulation layer near the exhaust vent will break, causing heat to escape and affecting the indoor environment. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes a range hood exhaust switch structure.

[0005] The exhaust switch structure of the range hood according to an embodiment of the present utility model includes: an exhaust port mounting frame connected to the exhaust port of the range hood, wherein a switch mounting ring is provided on the upper side of the exhaust port mounting frame; a hinge plate located inside the switch mounting ring, wherein the hinge plate is connected to the inner side wall of the switch mounting ring through a hinge plate pivot; and a connecting ring connected to the switch mounting ring, wherein the connecting ring includes a lower first connecting ring and an upper second connecting ring, the first connecting ring being sleeved on the outside of the switch mounting ring, and a duct being sleeved on the outside of the second connecting ring, allowing smoke to be discharged outward sequentially through the exhaust port mounting frame, the connecting ring, and the duct.

[0006] According to some embodiments of the present invention, a first mating ring is provided on the outer side of the switch mounting ring, and a gap is left between the inner sidewall of the first mating ring and the outer sidewall of the switch mounting ring as a first mating slot, and the first connecting ring is inserted into the first mating slot.

[0007] According to some embodiments of the present invention, the first mating ring is provided with a first mating ring insertion hole, and the outer wall of the first connecting ring is provided with a first connecting ring protrusion, which locks the first mating ring insertion hole.

[0008] According to some embodiments of the present invention, a transition step ring is provided between the first connecting ring and the second connecting ring, and the inner side of the transition step ring has a concave part, which locks the upper end of the switch mounting ring.

[0009] According to some embodiments of the present invention, a second docking ring is provided on the outer side of the second connecting ring, and a gap is left between the inner sidewall of the second docking ring and the second connecting ring as a second docking slot, and the air duct is inserted into the second docking slot.

[0010] According to some embodiments of the present invention, a trigger plate is provided on the outer wall of the second docking ring.

[0011] According to some embodiments of the present invention, a second inner protrusion is provided on the inner sidewall of the second docking ring, and a second inner protrusion hole is provided on the second inner protrusion. After the air duct fixing pin is inserted into the second inner protrusion hole, it locks the outer sidewall of the air duct.

[0012] According to some embodiments of the present invention, a duct fixing ring is provided in the second docking slot, and the duct fixing ring cooperates with the second docking slot to clamp the duct.

[0013] According to some embodiments of this utility model, an installation plate is provided on the outside of the smoke exhaust port mounting frame, and the installation plate is provided with mounting holes.

[0014] According to some embodiments of the present invention, a bearing seat is provided on the inner side wall of the switch mounting ring, and a rotating shaft insertion hole is provided on the bearing seat, and the hinge plate rotating shaft is inserted into the rotating shaft insertion hole.

[0015] The exhaust switch structure of the range hood according to the embodiment of this utility model has at least the following technical effects: the exhaust port mounting frame is connected to the air duct through the connecting ring, making the air duct connection more convenient. The air duct is sleeved on the outside of the second connecting ring of the connecting ring, ensuring that when the hinge plate flips and moves, the hinge plate is separated by the second connecting ring and will not hit the air duct insulation layer inside the air duct, ensuring that the air duct insulation layer will not be damaged, so as to maintain the heat insulation effect against oil fumes.

[0016] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0017] Additional aspects and advantages of this invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0018] Figure 1 This is a perspective view of the exhaust switch structure of the range hood of this utility model;

[0019] Figure 2 This is an exploded view of the exhaust switch structure of the range hood of this utility model;

[0020] Figure 3This is a cross-sectional view of the exhaust switch structure of the range hood of this utility model;

[0021] Figure 4 yes Figure 3 A magnified 3D view of region A in the middle;

[0022] Figure 5 yes Figure 3 A magnified 3D view of region B in the middle;

[0023] Figure 6 This is a perspective view of the smoke exhaust port mounting frame in this utility model;

[0024] Figure 7 This is a perspective view of the connecting ring in this utility model.

[0025] Figure label:

[0026] Smoke vent mounting frame 100, switch mounting ring 110, first mating ring 120, first mating slot 121, first mating ring insertion hole 122, bearing seat fixing post 123, hinge plate limiting protrusion 124, elastic pressing plate 125, pressing plate inner protrusion 126, mounting plate 130, mounting hole 131, bearing seat 140, shaft insertion hole 141, bearing seat buckle 142, limiting strip 143; hinge plate 200, hinge plate shaft 210; connecting ring 300, first Connecting ring 310, first connecting ring outer protrusion 311, first connecting ring inner protrusion rib 312, second connecting ring 320, second mating ring 330, second mating slot 331, trigger plate 332, second mating ring inner protrusion 333, second mating ring inner protrusion hole 334, duct fixing pin 335, transition step ring 340, concave position 341; duct fixing ring 400, horizontal fixing ring 410, vertical fixing ring 420; duct 500, duct insulation layer 510. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, "multiple" means two or more, and "greater than," "less than," "exceeding," etc., are understood to exclude the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly specifying the number of indicated technical features or their sequential relationship.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] The following is for reference. Figure 1 and Figure 2 The exhaust switch structure of a range hood according to an embodiment of the present utility model is described.

[0032] like Figure 1 and Figure 2 As shown, the exhaust switch structure of the range hood according to an embodiment of the present utility model includes an exhaust port mounting frame 100, a hinge plate 200, and a connecting ring 300.

[0033] The exhaust port mounting frame 100 is connected to the exhaust port of the range hood, and a switch mounting ring 110 is provided on the upper side of the exhaust port mounting frame 100; the hinge plate 200 is located inside the switch mounting ring 110, and the hinge plate 200 is connected to the inner wall of the switch mounting ring 110 through the hinge plate pivot 210; the connecting ring 300 is connected to the switch mounting ring 110, and the connecting ring 300 includes a lower first connecting ring 310 and an upper second connecting ring 320. The first connecting ring 310 is sleeved on the outside of the switch mounting ring 110, and the duct 500 is sleeved on the outside of the second connecting ring 320. The flue gas can be discharged outward in sequence through the exhaust port mounting frame 100, the connecting ring 300, and the duct 500.

[0034] For example, such as Figure 1 and Figure 2As shown, the exhaust port mounting frame 100 is connected to the exhaust port of the range hood, meaning that the exhaust switch structure of this utility model is fixed to the exhaust port position of the range hood via the exhaust port mounting frame 100. A switch mounting ring 110 is provided on the upper side of the exhaust port mounting frame 100. A hinge plate 200 is located inside the switch mounting ring 110, and the hinge plate 200 is connected to the inner wall of the switch mounting ring 110 via a hinge plate pivot 210. The opening and closing of the exhaust port is controlled by rotating the hinge plate 200 along the hinge plate pivot 210. When the hinge plate 200 blocks the position of the switch mounting ring 110, the exhaust port is in a closed state. When the hinge plate 200 flips over and no longer blocks the position of the switch mounting ring 110, the exhaust port is in an open state. The connecting ring 300 is connected to the switch mounting ring 110. The connecting ring 300 includes a lower first connecting ring 310 and an upper second connecting ring 320, meaning the connecting ring 300 is equivalent to a detachable structure for the exhaust port mounting frame 100. The first connecting ring 310 is sleeved on the outside of the switch mounting ring 110, meaning the connecting ring 300 is connected to the exhaust port mounting frame 100 via the first connecting ring 310. The duct 500 is sleeved on the outside of the second connecting ring 320, meaning the connecting ring 300 is connected to the duct 500 via the second connecting ring 320. Flue gas can be discharged outwards sequentially through the exhaust port mounting frame 100, the connecting ring 300, and the duct 500, ensuring smooth exhaust gas discharge.

[0035] In practical work, refer to Figure 2 , Figure 3 The exhaust port mounting frame 100 is fixed to the exhaust port position of the range hood. The fumes drawn in by the range hood are discharged through the exhaust port, which needs to be connected to a common exhaust port via a duct 500 to dissipate the fumes. The duct insulation layer 510 inside the duct 500 provides insulation. The exhaust port mounting frame 100 at the exhaust port position can be connected to the duct 500 via a connecting ring 300.

[0036] The exhaust vent mounting frame 100 is connected to the duct 500 via a connecting ring 300, and the first connecting ring 310 is fitted outside the switch mounting ring 110 to ensure that the first connecting ring 310 does not affect the hinge plate 200's flipping movement. The duct 500 is fitted outside the second connecting ring 320 to ensure that when the hinge plate 200 flips, it is separated by the second connecting ring 320 and will not hit the duct insulation layer 510 inside the duct 500, thus ensuring that the duct insulation layer 510 is not damaged and maintaining its heat insulation effect against oil fumes.

[0037] In some embodiments of this utility model, reference is made to Figure 4 , Figure 6A first mating ring 120 is provided on the outer side of the switch mounting ring 110. A gap is left between the inner side wall of the first mating ring 120 and the outer side wall of the switch mounting ring 110 as a first mating slot 121. The first connecting ring 310 is inserted into the first mating slot 121 to ensure a stable and reliable connection between the smoke exhaust port mounting frame 100 and the connecting ring 300.

[0038] In some specific embodiments of this utility model, the first mating ring 120 is provided with a first mating ring insertion hole 122, and the outer wall of the first connecting ring 310 is provided with a first connecting ring protrusion 311. The first connecting ring protrusion 311 is engaged with the first mating ring insertion hole 122, that is, the smoke exhaust port mounting frame 100 and the connecting ring 300 pass through each other. The first connecting ring protrusion 311 engages with the first mating ring insertion hole 122 in a snap-fit ​​connection, which facilitates the assembly and disassembly of the connecting ring 300.

[0039] In some embodiments of this utility model, an elastic pressing plate 125 is provided on the first mating ring 120, the first mating ring insertion hole 122 is located on the elastic pressing plate 125, and the elastic pressing plate 125 is provided with an inner protrusion 126. The elastic pressing plate 125 can press against the outer wall of the first connecting ring 310. When the worker presses the elastic pressing plate 125 with his hand, the elastic pressing plate 125 deforms inward, which not only prevents the outer protrusion 311 of the first connecting ring from blocking the first mating ring insertion hole 122, but also pushes open the outer wall of the first connecting ring 310 through the inner protrusion 126, ensuring that the connecting ring 300 can be disengaged from the exhaust port mounting frame 100, making it easier to remove the connecting ring 300.

[0040] In some embodiments of this utility model, a transition step ring 340 is provided between the first connecting ring 310 and the second connecting ring 320. The inner side of the transition step ring 340 has a concave part 341, which locks the upper end of the switch mounting ring 110. That is, after the smoke exhaust port mounting frame 100 is connected to the connecting ring 300, the upper end of the switch mounting ring 110 of the smoke exhaust port mounting frame 100 abuts against the transition step ring 340 of the connecting ring 300. This prevents the connecting ring 300 from becoming loose in the smoke exhaust port mounting frame 100, which would affect the stability of the connection between the smoke exhaust port mounting frame 100 and the connecting ring 300.

[0041] In some embodiments of this utility model, the inner wall of the first connecting ring 310 is provided with a first connecting ring inner protrusion 312. When the first connecting ring 310 is fitted onto the outside of the switch mounting ring 110, the first connecting ring inner protrusion 312 can abut against the outer wall of the switch mounting ring 110, making the connection between the connecting ring 300 and the smoke exhaust port mounting frame 100 more stable and reliable.

[0042] In some specific embodiments of this utility model, the hinge plate 200 includes two separate left and right sides, and the hinge plate pivot 210 of the hinge plate 200 is located in the middle of the switch mounting ring 110.

[0043] In some embodiments of this utility model, the inner sidewall of the switch mounting ring 110 is provided with a hinge plate limiting protrusion 124. When the hinge plate 200 is in a flat position blocking the exhaust port, the hinge plate limiting protrusion 124 can press against the lower side of the edge of the hinge plate 200 to limit the hinge plate 200. However, when the range hood is venting, the hinge plate limiting protrusion 124 does not affect the upward flipping process of the hinge plate 200.

[0044] In some embodiments of this utility model, reference is made to Figure 4 , Figure 7 A second mating ring 330 is provided on the outer side of the second connecting ring 320. A gap is left between the inner wall of the second mating ring 330 and the second connecting ring 320 as a second mating slot 331, into which the duct 500 is inserted. In this way, the inner wall of the duct 500, especially the duct insulation layer 510, does not need to be tightly attached to the outer wall of the second connecting ring 320, which is sufficient to ensure a stable connection between the duct 500 and the connecting ring 300 and protect the duct insulation layer 510 of the duct 500.

[0045] In some embodiments of this utility model, a trigger plate 332 is provided on the outer wall of the second mating ring 330 to facilitate workers to pinch the trigger plate 332 to perform the disassembly and assembly of the mating ring 300.

[0046] In some embodiments of this utility model, a second inner protrusion 333 is provided on the inner sidewall of the second mating ring 330, and a second inner protrusion hole 334 is provided on the second inner protrusion 333. After the duct fixing pin 335 is inserted into the second inner protrusion hole 334, it locks the outer sidewall of the duct 500. Inserting the duct fixing pin 335 into the second inner protrusion 333 provides a more secure connection to the duct 500.

[0047] In some embodiments of this utility model, a duct fixing ring 400 is provided in the second docking slot 331. The duct fixing ring 400 cooperates with the second docking slot 331 to clamp the duct 500. That is, after the duct 500 is inserted into the second docking slot 331, the duct fixing ring 400 is installed to ensure that the duct 500 is connected more firmly and reliably.

[0048] In some specific embodiments of this utility model, the duct fixing ring 400 includes a horizontal fixing ring 410 and a vertical fixing ring 420. The horizontal fixing ring 410 laterally abuts against the inner side wall of the second docking slot 331 and the outer side wall of the duct 500, while the vertical fixing ring 420 longitudinally abuts against the duct 500, further ensuring that the connection of the duct 500 is more stable and reliable.

[0049] In some embodiments of this utility model, reference is made to Figure 1 , Figure 2An installation plate 130 is provided on the outer side of the exhaust port mounting frame 100, and the installation plate 130 is provided with mounting holes 131. By screwing screws into the mounting holes 131, the exhaust port mounting frame 100 is fixed to the exhaust port of the range hood, ensuring that the exhaust port mounting frame 100 is securely installed on the range hood.

[0050] In some embodiments of this utility model, reference is made to Figure 2 , Figure 5 A bearing seat 140 is provided on the inner side wall of the switch mounting ring 110, and a shaft insertion hole 141 is provided on the bearing seat 140. The hinge plate shaft 210 is inserted into the shaft insertion hole 141.

[0051] In a further embodiment of this utility model, the bearing housing 140 and the switch mounting ring 110 are integrally formed.

[0052] In a further embodiment of this utility model, a bearing seat fixing post 123 is provided on the inner side wall of the switch mounting ring 110, and a bearing seat buckle 142 is provided on the bearing seat 140, which locks the bearing seat fixing post 123. In this way, the bearing seat 140 can be detached and connected to the switch mounting ring 110.

[0053] In a further embodiment of the present invention, a limiting strip 143 is provided on the inner sidewall of the switch mounting ring 110. The limiting strip 143 is located below the hinge plate 200 and is used to limit the range of rotation of the hinge plate 200.

[0054] According to the embodiments of the present utility model, the range hood adopts the above-mentioned range hood exhaust switch structure, which reduces the difficulty of connecting the air duct 500, facilitates the quick connection design between the range hood and the air duct 500, and can also ensure the heat insulation effect of the air duct 500, thereby improving the user experience.

[0055] Other components and operations of the range hood according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0056] The following is for reference. Figure 1 and Figure 2 The exhaust switch structure of a range hood according to an embodiment of the present invention is described in detail below with reference to a specific example. It is to be understood that the following description is merely illustrative and not intended to limit the scope of the invention.

[0057] like Figure 1 and Figure 2 As shown, the exhaust switch structure of the range hood in this embodiment of the present invention includes an exhaust port mounting frame 100, a hinge plate 200 and a connecting ring 300, which are used to connect the air duct 500 and ensure that the air duct insulation layer 510 inside the air duct 500 is durable enough.

[0058] The exhaust port mounting frame 100 is a square frame, including a switch mounting ring 110, a first mating ring 120, a mounting plate 130, and a bearing seat 140. The switch mounting ring 110 and the first mating ring 120 are cylindrical. The switch mounting ring 110 is provided with a bearing seat fixing post 123 and a hinge plate limiting protrusion 124. The first mating ring 120 is provided with a first mating slot 121, a first mating ring insertion hole 122, an elastic pressing plate 125, and a pressing plate inner protrusion 126. The mounting plate 130 is provided with a mounting hole 131. The bearing seat 140 is provided with a shaft insertion hole 141, a bearing seat buckle 142, and a limiting strip 143. Two hinge plates 200 are arranged on both sides within the switch mounting ring 110, and each hinge plate 200 includes a hinge plate pivot 210, which is connected to the pivot insertion hole 141.

[0059] The connecting ring 300 is cylindrical. The connecting ring 300 includes a first connecting ring 310, a second connecting ring 320, a second mating ring 330, and a transition step ring 340. The first connecting ring 310 has an outer protrusion 311 and an inner protrusion 312. The second mating ring 330 has a second mating slot 331, a trigger plate 332, an inner protrusion 333, an inner protrusion hole 334, and a duct fixing pin 335. The transition step ring 340 has a concave position 341.

[0060] According to the exhaust switch structure of the range hood in this embodiment of the present utility model, at least the following effects can be achieved by the following arrangement: the exhaust port mounting frame 100 is connected to the duct 500 through the connecting ring 300, making the connection of the duct 500 more convenient. The duct 500 is sleeved on the outside of the second connecting ring 320, ensuring that when the hinge plate 200 is flipped and moved, the hinge plate 200 is separated by the second connecting ring 320 and will not hit the duct insulation layer 510 inside the duct 500, ensuring that the duct insulation layer 510 will not be damaged and maintaining the heat insulation effect against oil fumes.

[0061] In the description of this specification, references to terms such as "some embodiments" or "as one might imagine" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0062] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An exhaust switch structure of a range hood, characterized by comprising: The utility model relates to a smoke exhaust mouth mounting frame (100) is connected to the smoke exhaust mouth of the range hood, the upper side of the smoke exhaust mouth mounting frame (100) is provided with switch mounting ring (110), the hinge board (200) is located in the switch mounting ring (110), the hinge board (200) is connected with the inboard wall of switch mounting ring (110) through the hinge board pivot (210), the adapter ring (300) is connected to the switch mounting ring (110), the adapter ring (300) includes the first connecting ring (310) of downside and the second connecting ring (320) of upside, the first connecting ring (310) is set on the outboard of switch mounting ring (110), the duct (500) is connected in the second connecting ring (320) outboard, and the flue gas can be sequentially discharged outward through the smoke exhaust mouth mounting frame (100), the adapter ring (300), the duct (500). The outboard of the switch mounting ring (110) is provided with the first butt joint ring (120), and a gap is left between the inboard wall of the first butt joint ring (120) and the outboard wall of the switch mounting ring (110) as a first butt joint slot (121), and the first connecting ring (310) is inserted into the first butt joint slot (121). The first butt joint ring (120) is provided with a first butt joint ring insertion hole (122), and the outboard wall of the first connecting ring (310) is provided with a first connecting ring outer convex part (311), and the first connecting ring outer convex part (311) clamps the first butt joint ring insertion hole (122). The first connecting ring (310) and the second connecting ring (320) are provided with a transition step ring (340), the inner side of the transition step ring (340) has a concave position (341), and the concave position (341) clamps the upper end of the switch mounting ring (110).

2. The exhaust switch structure of claim 1, wherein The outboard of the second connecting ring (320) is provided with a second butt joint ring (330), and a gap is left between the inboard wall of the second butt joint ring (330) and the second connecting ring (320) as a second butt joint slot (331), and the duct (500) is inserted into the second butt joint slot (331).

3. The range hood exhaust switch structure according to claim 2, wherein The outboard wall of the second butt joint ring (330) is provided with a trigger plate (332).

4. The range hood exhaust switch structure according to claim 2, wherein The inboard wall of the second butt joint ring (330) is provided with a second butt joint ring inner convex part (333), the second butt joint ring inner convex part (333) is provided with a second butt joint ring inner convex part hole (334), and a duct fixing pin (335) is inserted into the second butt joint ring inner convex part hole (334) to clamp the outboard wall of the duct (500).

5. The range hood exhaust switch structure according to claim 1, wherein The second butt joint slot (331) is provided with a duct fixing ring (400), and the duct fixing ring (400) cooperates with the second butt joint slot (331) to clamp the duct (500).

6. The structure of the exhaust switch of the range hood according to claim 5, wherein, The outboard of the smoke exhaust mouth mounting frame (100) is provided with a mounting plate (130), and the mounting plate (130) is provided with a mounting hole (131).

7. The structure of the exhaust switch of the range hood according to claim 5, wherein, ​ 8. The range hood exhaust switch structure according to claim 5, wherein ​ 9. The range hood exhaust switch structure according to claim 1, wherein ​ 10. The range hood exhaust switch structure according to claim 1, wherein The switch mounting ring (110) is provided with a bearing seat (140) on the inner side wall, the bearing seat (140) is provided with a rotating shaft insertion hole (141), and the hinge plate rotating shaft (210) is inserted into the rotating shaft insertion hole (141).

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