Antenna assembly and cooking device

Abstract

The application discloses an antenna assembly and a cooking device. A motor shaft of a stirring motor is coaxially connected with a connecting shaft, and the connecting shaft is coaxially connected with an antenna shaft. The connecting shaft is arranged between the motor shaft and the antenna shaft, so that the length of the motor shaft and the length of the antenna shaft are shortened while the distance between a seat body of the stirring motor and a fan blade is kept unchanged. On one hand, the weight of the antenna shaft is reduced, the antenna shaft and the fan blade are prevented from being deviated and vibrated when rotating, and the service life is prolonged. On the other hand, the motor shaft is prevented from being deviated when rotating, and the rotating track of the motor shaft is stabilized.

Description

Technical Field

[0001] This application relates to the field of household appliance technology, and in particular to an antenna assembly and a cooking device. Background Technology

[0002] A microwave oven is a kitchen appliance that uses microwave radiation to heat and cook food. It generates microwaves, causing water molecules in food to vibrate and generate heat through friction, thus heating or cooking the food. Microwave ovens are widely used in homes, offices, and other settings due to their fast heating speed and ease of operation. The antenna assembly, located inside the microwave oven, is used to emit microwaves into the interior. This assembly is a crucial part of the microwave oven, directly affecting its ability to effectively heat food.

[0003] The antenna assembly mainly uses a stirring motor to drive the antenna shaft and fan blades to rotate, so as to achieve uniform distribution of microwaves throughout the inner cavity, thereby achieving a more uniform heating effect.

[0004] In the existing technology, the motor shaft and antenna shaft of the stirring motor are directly connected. On the one hand, the longer antenna shaft leads to increased weight and a higher center of gravity. The rotation of the antenna shaft and the fan blades is prone to deviation and vibration, affecting the service life, especially when the fan blades have an asymmetrical structure. On the other hand, due to the structural size limitations of the waveguide, the base of the stirring motor is far from the fan blades. Therefore, the motor shaft also needs to be lengthened to connect with the antenna shaft. This makes it easy for the motor shaft to deflect when it rotates, and the rotation trajectory is unstable. Utility Model Content

[0005] The purpose of this application is to provide an antenna assembly and a cooking device that avoids the rotational deflection caused by an excessively long motor shaft and the offset and vibration caused by the rotation of the antenna blades due to an excessively long antenna shaft.

[0006] The embodiments of this application can be implemented as follows: In a first aspect, this utility model provides an antenna assembly, including a stirring motor, a connecting shaft, an antenna shaft, and fan blades; The end face of one of the motor shaft of the stirring motor and the connecting shaft is provided with a coaxial first connecting hole. The shape of the other of the antenna shaft and the connecting shaft is adapted to the shape of the first connecting hole, and the other of the connecting shaft and the motor shaft is inserted into the first connecting hole. The fan blades are connected to the antenna shaft.

[0007] In an optional embodiment, the other of the connecting shaft and the motor shaft and the first connecting hole are both non-circular, and the other of the connecting shaft and the motor shaft are clearance-fitted with the first connecting hole.

[0008] In an optional embodiment, the end face of one of the connecting shaft and the motor shaft is chamfered to transition with the inner circumferential surface of the first connecting hole.

[0009] In an optional embodiment, a second chamfer transition is used between the end face and the outer peripheral face of the other of the connecting shaft and the motor shaft.

[0010] In an optional embodiment, one of the connecting shaft and the antenna shaft has a coaxial second connecting hole on its end face, and the other of the connecting shaft and the antenna shaft has a coaxial connecting protrusion on its end face. The shape of the connecting protrusion and the second connecting hole are adapted to each other, and the connecting protrusion is inserted into the second connecting hole.

[0011] In an optional embodiment, both the connecting protrusion and the second connecting hole are non-circular, and the connecting protrusion and the second connecting hole are clearance-fitted.

[0012] In an optional embodiment, both the connecting protrusion and the second connecting hole are prismatic.

[0013] In an optional embodiment, a third chamfer is used for the transition between the outer peripheral surface and the end face of the connecting protrusion; And / or, The end face of one of the connecting shaft and the antenna shaft transitions with the inner circumferential surface of the second connecting hole using a fourth chamfer.

[0014] In an optional embodiment, the connecting shaft is made of a non-wave-absorbing material; And / or, The antenna shaft and the fan blades are made of metallic materials; And / or, The antenna shaft and the fan blades are connected by screws.

[0015] Secondly, this utility model provides a cooking device, including an inner pot, a retaining ring, a mounting shell, a waveguide, a mica sheet, a top glass, and an antenna assembly as described in any of the foregoing embodiments; The mounting shell is fixed to the top of the inner liner, and the mounting shell is provided with a window; The top glass is installed inside the mounting housing, and the mounting housing and the top glass together form a boss cavity; The waveguide is connected to the mounting housing, and the inner cavity of the waveguide communicates with the window; The base of the stirring motor is fixed above the mounting housing; Both the mica sheet and the antenna blade are located within the boss cavity, and the mica sheet is fixed to the mounting shell and covers the window. The mica sheet is provided with a mounting hole communicating with the window, and the fan blade is located between the mica sheet and the top glass. The retaining ring is fixed to the mounting hole; The antenna shaft is rotatably mounted on the retaining ring.

[0016] Compared with the prior art, the beneficial effects of the embodiments of this application include, for example: The motor shaft of the stirring motor is coaxially connected to the connecting shaft, which in turn is coaxially connected to the antenna shaft. This additional connecting shaft between the motor shaft and the antenna shaft reduces the length of both the motor shaft and the antenna shaft while maintaining the same distance between the motor's base and the fan blades. This reduces the weight of the antenna shaft, prevents misalignment and vibration during rotation, and extends its service life. Furthermore, it prevents excessively long motor shafts from causing rotational deviation and ensures stable rotation trajectory. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a cross-sectional view of a partial structure of a cooking device according to an embodiment of this application; Figure 2 for Figure 1 Enlarged view of region A; Figure 3 for Figure 1 A schematic diagram of the antenna assembly; Figure 4 for Figure 3 The front view of the connecting axis; Figure 5 for Figure 4 A sectional view; Figure 6 A cross-sectional view of the stirring motor in another embodiment; Figure 7 for Figure 1 A partial schematic diagram of the combined structure of the central antenna shaft and fan blades; Figure 8 for Figure 3 Bottom view of the central connecting axis; Figure 9 A cross-sectional view of the antenna axis in another embodiment; Figure 10 This is a cross-sectional view of the connection structure between the antenna shaft and the fan blades in one embodiment.

[0019] Icons: 100-Antenna assembly; 110-Stirring motor; 111-Base; 112-Motor shaft; 113-Second chamfer; 120-Connecting shaft; 121-First connecting hole; 122-First chamfer; 123-Connecting protrusion; 124-First plane; 125-Third chamfer; 130-Antenna shaft; 131-Second connecting hole; 132-Second plane; 133-Fourth chamfer; 134-Second skirt; 135-Threaded hole; 140-Fan blade; 141-Through hole; 200-Inner liner; 300-Mounting shell; 310-Window; 400-Top glass; 500-Mica sheet; 510-Mounting hole; 600-Waveguide; 700-Stabilizing ring; 710-First skirt; 800-Boss cavity. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application 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, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0026] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0027] refer to Figures 1 to 3 This application discloses a cooking device, which can be a microwave oven or other types of kitchen appliances, such as an oven, an induction cooker, etc.

[0028] The cooking equipment includes a magnetron (not shown), an inner pot 200, a retaining ring 700, a mounting shell 300, a waveguide 600, a mica sheet 500, a top glass 400, and an antenna assembly 100; the antenna assembly 100 includes a stirring motor 110, a connecting shaft 120, an antenna shaft 130, and a fan blade 140. The inner liner 200 is mainly used to hold food.

[0029] The mounting shell 300 is fixed to the top of the inner liner 200, and the mounting shell 300 is provided with a window 310; The top glass 400 is installed inside the mounting shell 300. The mounting shell 300 and the top glass 400 together form a boss cavity 800. The mica sheet 500 and the fan blade 140 are both located inside the boss cavity 800. In this way, the top glass 400 can seal components such as the fan blade 140, the antenna shaft 130, and the mica sheet 500. The waveguide 600 is connected to the mounting shell 300, and the inner cavity of the waveguide 600 is connected to the window 310. The magnetron is connected to the waveguide 600 and is used to continuously generate microwaves under power excitation. The microwaves can be transmitted through the inner cavity of the waveguide 600, the window 310, the boss cavity 800 and the top glass 400 to the inner liner 200 to heat the food.

[0030] The base 111 of the stirring motor 110 is fixed above the mounting shell 300. The motor shaft 112 of the stirring motor 110 is coaxially connected to the connecting shaft 120, and the connecting shaft 120 is coaxially connected to the antenna shaft 130. In this way, when the motor shaft 112 rotates, it can drive the connecting shaft 120, the antenna shaft 130 and the fan blade 140 to rotate together.

[0031] The mica sheet 500 is fixed to the mounting shell 300 and covers the window 310. The mica sheet 500 is provided with a mounting hole 510 communicating with the window 310. In this way, the mica sheet 500 can act as a protective layer to cover the outlet of the waveguide 600, preventing other impurities from entering the waveguide 600 or even the magnetron. At the same time, it allows microwaves to pass smoothly through the waveguide 600 to the boss cavity 800, and then be dispersed by the rotating antenna before being transmitted to the inner liner 200 to heat the food.

[0032] The retaining ring 700 is fixed to the mounting hole 510 and serves as a component for carrying the antenna. The antenna shaft 130 is rotatably inserted through the retaining ring 700. The fan blade 140 is located between the mica sheet 500 and the top glass 400. The antenna shaft 130 is coaxially connected to the connecting shaft 120, and the motor shaft 112 is coaxially connected to the connecting shaft 120.

[0033] To achieve axial positioning of the retaining ring 700, the retaining ring 700 has a first skirt 710 extending radially outward, which abuts against the side of the mica sheet 500 facing away from the inner liner 200. To achieve axial positioning of the antenna shaft 130, the antenna shaft 130 has a second skirt 134 extending radially outward, which abuts against the end of the retaining ring 700 facing away from the inner liner 200.

[0034] As described above, the motor shaft 112 of the stirring motor 110 is coaxially connected to the connecting shaft 120, which in turn is coaxially connected to the antenna shaft 130. By adding the connecting shaft 120 between the motor shaft 112 and the antenna shaft 130, the length of the motor shaft 112 and the antenna shaft 130 can be shortened while keeping the distance between the base 111 of the stirring motor 110 and the fan blade 140 unchanged. On the one hand, this can reduce the weight of the antenna shaft 130, prevent the antenna shaft 130 and the fan blade 140 from shifting and vibrating, and extend their service life; on the other hand, it can prevent the motor shaft 112 from being too long and causing rotational deflection, thus ensuring the stability of the rotation trajectory of the motor shaft 112.

[0035] refer to Figures 3 to 5 In one embodiment, a first connecting hole 121 is provided on the end face of the connecting shaft 120 near the base 111. The first connecting hole 121 is a blind hole. The shape of the motor shaft 112 is adapted to the shape of the first connecting hole 121. The motor shaft 112 is inserted into the first connecting hole 121 to realize the connection between the motor shaft 112 and the connecting shaft 120.

[0036] Both the motor shaft 112 and the first connecting hole 121 are non-circular. For example, both the first connecting hole 121 and the motor shaft 112 are elliptical, prismatic, or have other multi-curved contours, or contours enclosed by curves and straight lines. Thus, the outer circumferential surface of the motor shaft 112 and the inner circumferential surface of the first connecting hole 121 are undulating in the circumferential direction. The motor shaft 112 and the first connecting hole 121 are fitted with a clearance fit, making assembly convenient; simply align the motor shaft 112 with the first connecting hole 121 and insert it. When the motor shaft 112 rotates, the protruding or flat areas on the outer circumferential surface of the motor shaft 112 can abut and fit against the recessed or flat areas on the inner circumferential surface of the first connecting hole 121, preventing relative rotation between the motor shaft 112 and the first connecting hole 121. In this way, the motor shaft 112 can drive the first connecting hole 121 to rotate.

[0037] It is understandable that the first connecting hole 121 and the motor shaft 112 can also be circular, and the two can be fixedly connected coaxially by welding or interference fit.

[0038] Continue to refer to Figure 5 In one embodiment, a first chamfer 122 is used to transition between the inner circumferential surface of the first connecting hole 121 and the end face of the connecting shaft 120. The first chamfer 122 can play a guiding role when the motor shaft 112 is inserted into the first connecting hole 121. The first chamfer 122 slides with the end of the motor shaft 112 to guide the motor shaft 112 to be accurately inserted into the first connecting hole 121.

[0039] Additionally, refer to Figure 6 A second chamfer 113 can also be used to transition between the end face and the outer peripheral surface of the motor shaft 112. In this way, the second chamfer 113 slides with the opening of the first connecting hole 121 to guide the motor shaft 112 to be accurately inserted into the first connecting hole 121.

[0040] It should be noted that in some embodiments not shown, the first connecting hole 121 may also be located on the end face of the motor shaft 112. In this case, the connecting shaft 120 is inserted into the first connecting hole 121 on the end face of the motor shaft 112. Correspondingly, the connecting shaft 120 and the first connecting hole 121 are non-circular and are connected by clearance fit to prevent rotation, or the connecting shaft 120 and the first connecting hole 121 are circular and are fixedly connected by welding or interference fit. In this case, the inner circumferential surface of the first connecting hole 121 and the end face of the motor shaft 112 are transitioned by a first chamfer 122, and the end face of the connecting shaft 120 and the outer circumferential surface are transitioned by a second chamfer 113.

[0041] In other words, in this application, one of the connecting shaft 120 and the motor shaft 112 has a coaxial first connecting hole 121 on its end face. The shape of the other connecting shaft 120 and the motor shaft 112 is adapted to the shape of the first connecting hole 121, and the other connecting shaft 120 and the motor shaft 112 are inserted into the first connecting hole 121. Both the other connecting shaft 120 and the motor shaft 112 and the first connecting hole 121 are non-circular, and the other connecting shaft 120 and the motor shaft 112 are clearance-fitted with the first connecting hole 121. A first chamfer 122 is formed between the end face of one of the connecting shaft 120 and the inner circumferential surface of the first connecting hole 121; a second chamfer 113 is formed between the end face and the outer circumferential surface of the other connecting shaft 120 and the motor shaft 112.

[0042] refer to Figure 2 , Figure 3 and Figure 7 In one embodiment, the end face of the antenna shaft 130 is provided with a coaxial second connecting hole 131, which is a blind hole. The end face of the connecting shaft 120 is provided with a coaxial connecting protrusion 123. The shape of the connecting protrusion 123 and the second connecting hole 131 are adapted to each other, and the connecting protrusion 123 is inserted into the second connecting hole 131 to realize the connection between the connecting shaft 120 and the antenna shaft 130.

[0043] The connecting protrusion 123 and the second connecting hole 131 are both non-circular, such as the cubic structure (i.e., quadrangular prism) shown in the figure. Therefore, the connecting protrusion 123 has four first planes 124 connected end to end in sequence (see reference). Figure 8 The second connecting hole 131 has four second planes 132 connected end to end in sequence (see reference). Figure 7 The outer circumferential surface of the connecting protrusion 123 and the inner circumferential surface of the second connecting hole 131 are undulating in the circumferential direction. The connecting protrusion 123 and the second connecting hole 131 are clearance-fitted, so during assembly, it is only necessary to align the connecting protrusion 123 with the second connecting hole 131 and insert it, which is convenient. When the connecting shaft 120 rotates under the drive of the motor shaft 112, the first plane 124 and the second plane 132 abut against each other, which prevents relative rotation between the connecting protrusion 123 and the antenna shaft 130. In this way, the connecting protrusion 123 can drive the antenna shaft 130 to rotate, and in turn drive the fan blade 140 to rotate.

[0044] Of course, the shape of the connecting protrusion 123 and the shape of the second connecting hole 131 can also be an ellipse (not shown), a prism other than an equilateral quadrangular prism (a triangular prism, a pentagonal prism or a prism with more than six edges), or other multi-curve enclosed contours, as well as contours enclosed by curves and straight lines, as long as they can prevent the connecting protrusion 123 and the antenna shaft 130 from rotating relative to each other.

[0045] In addition, the second connecting hole 131 and the connecting protrusion 123 can also be circular, and the two can be fixedly connected coaxially by welding or interference fit.

[0046] Continue to refer to Figure 5 In one embodiment, a third chamfer 125 is used to transition between the outer peripheral surface and the end face of the connecting protrusion 123. The third chamfer 125 can play a guiding role when the connecting protrusion 123 is inserted into the second connecting hole 131. The connecting protrusion 123 is guided to be accurately inserted into the second connecting hole 131 by slidingly engaging the third chamfer 125 with the opening of the second connecting hole 131.

[0047] Additionally, refer to Figure 9 The inner circumferential surface of the second connecting hole 131 and the end face of the antenna shaft 130 can also be transitioned by a fourth chamfer 133. In this way, the fourth chamfer 133 slides with the end of the connecting protrusion 123 to guide the connecting protrusion 123 to be accurately inserted into the second connecting hole 131.

[0048] It should be noted that in some embodiments not shown, the second connecting hole 131 can also be the end face of the connecting shaft 120. In this case, the antenna shaft 130 is inserted into the second connecting hole 131. Correspondingly, the second connecting hole 131 and the antenna shaft 130 are non-circular and are connected by clearance fit to prevent rotation. Alternatively, the antenna shaft 130 and the second connecting hole 131 are circular and are fixedly connected by welding or interference fit. In this case, the inner circumferential surface of the second connecting hole 131 and the end face of the connecting shaft 120 are transitioned by a third chamfer 125.

[0049] In other words, in this application, one of the connecting shaft 120 and the antenna shaft 130 has a coaxial second connecting hole 131 on its end face, and the other of the connecting shaft 120 and the antenna shaft 130 has a coaxial connecting protrusion 123 on its end face. The shape of the connecting protrusion 123 and the second connecting hole 131 are adapted to each other, and the connecting protrusion 123 is inserted into the second connecting hole 131. A fourth chamfer 133 is formed between the end face of one of the connecting shaft 120 and the antenna shaft 130 and the inner circumferential surface of the second connecting hole 131.

[0050] Understandably, in order to prevent the connecting shaft 120 from absorbing microwaves, the material of the connecting shaft 120 is made of non-absorbing materials such as polytetrafluoroethylene or ceramics.

[0051] The shielding ring 700 is also made of non-wave-absorbing materials such as polytetrafluoroethylene and ceramics to prevent microwave absorption.

[0052] The antenna shaft 130 and fan blade 140 are made of a metal material such as aluminum, and are detachably connected and fixed using fasteners such as screws. For example, see reference... Figure 10 The antenna shaft 130 is provided with a coaxial threaded hole 135. The threaded hole 135 can be a through hole communicating with the second connecting hole 131 or a blind hole. The fan blade 140 is provided with a through hole 141. The fan blade 140 and the antenna shaft 130 can be coaxially connected by a screw passing through the through hole 141 and locking it with the threaded hole 135. This allows for disassembly, maintenance or replacement of parts.

[0053] In summary, this application discloses an antenna assembly 100 and a cooking device. The introduction of the connecting shaft 120 shortens the shaft length of both the motor shaft 112 and the antenna shaft 130, avoiding the rotational deflection caused by the excessive length of the motor shaft 112 and the offset and vibration caused by the rotation of the antenna blades due to the excessive length of the antenna shaft 130.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An antenna assembly, characterized in that, It includes a stirring motor (110), a connecting shaft (120), an antenna shaft (130), and fan blades (140). The end face of one of the motor shaft (112) of the stirring motor (110) and the connecting shaft (120) is provided with a coaxial first connecting hole (121). The shape of the other of the antenna shaft (130) and the connecting shaft (120) is adapted to the shape of the first connecting hole (121), and the other of the connecting shaft (120) and the motor shaft (112) is inserted into the first connecting hole (121). The fan blade (140) is connected to the antenna shaft (130).

2. The antenna assembly according to claim 1, characterized in that, The other of the connecting shaft (120) and the motor shaft (112) is non-circular with the first connecting hole (121), and the other of the connecting shaft (120) and the motor shaft (112) is clearance-fitted with the first connecting hole (121).

3. The antenna assembly according to claim 1 or 2, characterized in that, The end face of one of the connecting shaft (120) and the motor shaft (112) transitions with the inner circumferential surface of the first connecting hole (121) by a first chamfer (122).

4. The antenna assembly according to claim 1 or 2, characterized in that, A second chamfer (113) is used to transition between the end face and the outer peripheral face of the other of the connecting shaft (120) and the motor shaft (112).

5. The antenna assembly according to claim 1, characterized in that, One of the connecting shaft (120) and the antenna shaft (130) has a coaxial second connecting hole (131) on its end face, and the other of the connecting shaft (120) and the antenna shaft (130) has a coaxial connecting protrusion (123) on its end face. The shape of the connecting protrusion (123) and the second connecting hole (131) are adapted to each other, and the connecting protrusion (123) is inserted into the second connecting hole (131).

6. The antenna assembly according to claim 5, characterized in that, Both the connecting protrusion (123) and the second connecting hole (131) are non-circular, and the connecting protrusion (123) and the second connecting hole (131) are in clearance fit.

7. The antenna assembly according to claim 6, characterized in that, Both the connecting protrusion (123) and the second connecting hole (131) are prismatic.

8. The antenna assembly according to any one of claims 5-7, characterized in that, The outer peripheral surface and end face of the connecting protrusion (123) are transitioned by a third chamfer (125); And / or, The end face of one of the connecting shaft (120) and the antenna shaft (130) transitions with the inner circumferential surface of the second connecting hole (131) using a fourth chamfer (133).

9. The antenna assembly according to claim 1, characterized in that, The material of the connecting shaft (120) is a non-wave-absorbing material; And / or, The antenna shaft (130) and the fan blade (140) are made of metal. And / or, The antenna shaft (130) and the fan blade (140) are connected by screws.

10. A cooking device, characterized in that, It includes an inner liner (200), a retaining ring (700), a mounting shell (300), a waveguide (600), a mica sheet (500), a top glass (400), and an antenna assembly as described in any one of claims 1-9; The mounting shell (300) is fixed to the top of the inner liner (200), and the mounting shell (300) is provided with a window (310). The top glass (400) is installed inside the mounting shell (300), and the mounting shell (300) and the top glass (400) together form a boss cavity (800). The waveguide (600) is connected to the mounting housing (300), and the inner cavity of the waveguide (600) communicates with the window (310); The base (111) of the stirring motor (110) is fixed above the mounting shell (300); The mica sheet (500) and the antenna blade are both located inside the boss cavity (800), and the mica sheet (500) is fixed to the mounting shell (300) and covers the window (310). The mica sheet (500) is provided with a mounting hole (510) communicating with the window (310). The fan blade (140) is located between the mica sheet (500) and the top glass (400). The retaining ring (700) is fixed to the mounting hole (510); The antenna shaft (130) is rotatably mounted on the retaining ring (700).

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