Range hood and switch assembly thereof

Abstract

The utility model relates to a range hood and a switch assembly thereof. The switch assembly comprises an induction type switch circuit board, a protective cover and a back plate. During assembly, the rear part of the induction type switch circuit board is connected with the protective cover and is arranged in the protective cover, and then the protective cover is arranged on the back plate. Visibly, a hanging lug does not need to be arranged and is arranged on the fixed bracket, so that the installation of induction type switch circuit boards with different lengths and sizes can be adapted, the installation flexibility is relatively high, and the investment of mold cost in later product development is reduced; in addition, the two opposite ends of the induction type switch circuit board in the left-right direction do not need to be provided with hanging lugs, namely, the left-right space of the induction type switch circuit board is not occupied, and therefore the adjustability of the display area is larger. In addition, as the two opposite ends of the induction type switch circuit board in the left-right direction do not need to be provided with hanging lugs, materials can be saved, and the cost is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and particularly to a range hood and a switch assembly thereof. Background Art

[0002] A range hood belongs to kitchen electrical equipment and is used to absorb the oil fume generated during the cooking process. The switch assembly of a range hood in the related art is used to implement various functions such as adjusting the wind force, lighting, and selecting the working mode, and usually includes a button-type switch structure or an inductive switch circuit board structure. Among them, the button-type switch structure adopts mechanical buttons arranged on the operation panel of the range hood, and various functions are realized by manually pressing the mechanical buttons; the inductive switch circuit board structure includes a touch induction switch, an infrared induction switch, a voice control switch, etc. For the touch induction switch, it is usually arranged on the back of the operation panel. Hanging ears are provided at both opposite ends of the inductive switch circuit board in the left-right direction, and fixing brackets corresponding to the hanging ears are also installed on the back plate on the back of the operation panel. Each hanging ear is correspondingly installed on each fixing bracket through fasteners such as screws and pins.

[0003] However, since the hanging ears at both opposite ends of the inductive switch circuit board in the left-right direction occupy a certain space, the length dimension of the functional area of the inductive switch circuit board in the left-right direction is limited. In addition, when it is necessary to reduce the length dimension of the inductive switch circuit board in the left-right direction, in order to be able to connect to the fixing brackets on the back plate, it is usually necessary to increase the length of the hanging ears, which will lead to an increase in material costs and at the same time require the configuration of corresponding molds, resulting in an increase in mold input costs. Summary of the Utility Model

[0004] The first technical problem to be solved by the present application is to provide a switch assembly for a range hood, which can flexibly adjust the length of the inductive switch circuit board, can increase the length adjustment range of the inductive switch circuit board, and can reduce costs at the same time.

[0005] The second technical problem to be solved by the present application is to provide a range hood, which can flexibly adjust the length of the inductive switch circuit board, can increase the length adjustment range of the inductive switch circuit board, and can reduce costs at the same time.

[0006] The above first technical problem is solved by the following technical solutions:

[0007] A switch assembly for a range hood, the switch assembly of the range hood includes:

[0008] An inductive switch circuit board;

[0009] A protective cover, the protective cover covers the outside of the inductive switch circuit board, and the protective cover is fixedly connected to the rear part of the inductive switch circuit board; and

[0010] A back plate, the back plate is used to be fixedly mounted on the inner wall of the operating panel of the range hood, the back plate is fixedly connected to the protective cover, and the two surround the inductive switch circuit board.

[0011] The switch assembly of the range hood described in the present application has the following beneficial effects compared with the background technology:

[0012] When assembling the switch assembly of the range hood described above, the rear part of the inductive switch circuit board is connected to the protective cover and installed inside the protective cover, and then the protective cover is installed on the back plate. It can be seen that there is no need to set hanging ears at the opposite ends of the inductive switch circuit board along the left and right directions and adopt the installation method of installing the hanging ears on the fixed bracket of the back plate. Instead, the rear part of the inductive switch circuit board is fixedly connected to the protective cover, so that it can adapt to the installation of inductive switch circuit boards of various lengths and sizes, and the installation flexibility is strong, which reduces the investment in mold costs in the later product development; in addition, since there is no need to set hanging ears at the opposite ends of the inductive switch circuit board along the left and right directions, that is, the left and right space of the inductive switch circuit board is not occupied, the display area is more adjustable; in addition, since there is no need to set hanging ears at the opposite ends of the inductive switch circuit board along the left and right directions, it can save materials and reduce costs.

[0013] In one embodiment, the back plate is provided with a supporting portion, and the protective cover is provided with a connecting portion corresponding to the position of the supporting portion and connected to each other; the supporting portion and the connecting portion are located in the peripheral area of ​​the inductive switch circuit board.

[0014] In one embodiment, there are two supporting parts and two connecting parts, and the two connecting parts are connected to the two supporting parts in a one-to-one correspondence; the two supporting parts and the two connecting parts are respectively located on opposite sides of the inductive switch circuit board.

[0015] In one embodiment, the supporting portion is a protruding portion of the back plate protruding toward the protective cover, and the connecting portion is a recessed portion on the protective cover that is recessed inside the protective cover; and / or, the contact portion between the supporting portion and the connecting portion is surface contact.

[0016] In one embodiment, the supporting portion includes a first supporting arm, a connecting arm and a second supporting arm which are connected in sequence, the connecting arm is arranged at an angle to the first supporting arm and the second supporting arm respectively, and the connecting arm is connected to the connecting portion; the connecting portion is a groove recessed inside the protective cover.

[0017] In one embodiment, fixing posts are provided at the rear of the inductive switch circuit board. A first assembly hole is formed on the fixing post, and a second assembly hole corresponding to the position of the first assembly hole is formed on the protective cover. The switch assembly of the range hood further includes a connecting piece, and the connecting piece passes through the second assembly hole and the first assembly hole to fixedly connect the protective cover to the fixing post.

[0018] In one embodiment, a pressing portion that abuts against the rear of the inductive switch circuit board is provided on the protective cover; the pressing portion is a convex bump protruding towards the inductive switch circuit board; the contact portion between the pressing portion and the inductive switch circuit board is a surface contact.

[0019] In one embodiment, the protective cover includes a panel disposed opposite to the inductive switch circuit board and a surrounding plate connected to the panel. The surrounding plate is provided with a flanging that turns towards the inside of the protective cover at one end away from the panel.

[0020] The above second technical problem is solved by the following technical solutions:

[0021] A range hood, the range hood includes the switch assembly of the range hood as described above, and further includes an operation panel, and the back plate is fixedly installed on the inner wall of the operation panel.

[0022] The beneficial effects of the range hood described in the present application compared with the background art:

[0023] For the above range hood, during assembly, the rear of the inductive switch circuit board is connected to the protective cover and installed inside the protective cover, and then the protective cover is installed on the back plate. Thus, it can be seen that instead of arranging lugs at the opposite ends of the inductive switch circuit board in the left-right direction and using the lugs to be installed on the fixed bracket of the back plate, the rear of the inductive switch circuit board is fixedly connected to the protective cover, so as to be adaptable to the installation of inductive switch circuit boards of various lengths and sizes, with strong installation flexibility and reduced investment in mold costs during later product development; in addition, since there is no need to arrange lugs at the opposite ends of the inductive switch circuit board in the left-right direction, that is, the left and right spaces of the inductive switch circuit board are not occupied, the adjustability of the display area is greater; furthermore, since there is no need to arrange lugs at the opposite ends of the inductive switch circuit board in the left-right direction, materials can be saved and costs can be reduced.

[0024] In one embodiment, a light-transmitting plate is provided on the operation panel, a window corresponding to the light-transmitting plate is provided on the back plate, and the inductive switch circuit board is arranged in alignment with the window. Description of the Drawings

[0025] The accompanying drawings, which form a part of this application, are used to provide a further understanding of this application. The schematic embodiments of this application and their descriptions are used to explain this application and do not constitute an improper limitation of this application.

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings required for the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other accompanying drawings can be obtained based on these drawings.

[0027] Figure 1 Structural diagram of a range hood according to an embodiment of this application;

[0028] Figure 2 Structural diagram of the switch assembly of the range hood according to an embodiment of this application installed on the operation panel;

[0029] Figure 3 is Figure 2 Exploded structural diagram of the shown structure;

[0030] Figure 4 is Figure 3 Structural diagram of the shown structure with the protective cover and the inductive switch circuit board removed;

[0031] Figure 5 is Figure 3 Structural diagram of the inductive switch circuit board in the shown structure;

[0032] Figure 6 is Figure 3 Structural diagram of the protective cover in the shown structure.

[0033] Reference numerals:

[0034] 10. Inductive switch circuit board; 11. Fixed post; 111. First assembly hole; 20. Protective cover; 21. Connecting part; 22. Second assembly hole; 23. Pressing part; 24. Panel; 25. Enclosure; 251. Flange; 30. Back panel; 31. Window; 32. Supporting part; 321. First supporting arm; 322. Connecting arm; 323. Second supporting arm; 40. Operation panel; 41. Translucent panel; 50. Fastener; 60. Connecting piece. Detailed implementation manners

[0035] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0036] It should be noted that the length of the inductive switch circuit board in this embodiment refers to the distance between two opposite end surfaces in the left-right direction when the inductive switch circuit board is normally installed on the operation panel of the range hood.

[0037] See also Figures 1 to 3 , Figure 1 A structural diagram of a range hood according to an embodiment of the present application is shown. Figure 2 A structural diagram showing a switch assembly of a range hood according to an embodiment of the present application installed on an operation panel 40 is shown. Figure 3 Shows Figure 2 An exploded structural diagram of the structure shown. An embodiment of the present application provides a switch assembly of a range hood, the switch assembly of the range hood comprising: an inductive switch circuit board 10, a protective cover 20 and a back plate 30. The protective cover 20 is disposed on the outside of the inductive switch circuit board 10, and the protective cover 20 is fixedly connected to the rear of the inductive switch circuit board 10. The back plate 30 is used to be fixedly mounted on the inner wall of the operation panel 40 of the range hood, and the back plate 30 is fixedly connected to the protective cover 20, and the two surround the inductive switch circuit board 10.

[0038] When assembling the switch assembly of the range hood, the rear part of the inductive switch circuit board 10 is connected to the protective cover 20 and installed inside the protective cover 20, and then the protective cover 20 is installed on the back plate 30. It can be seen that the inductive switch circuit board 10 does not need to be provided with hanging ears at the opposite ends in the left-right direction and the hanging ears are installed on the fixed bracket of the back plate 30. Instead, the rear part of the inductive switch circuit board 10 is fixedly connected with the protective cover 20, so that it can adapt to the installation of inductive switch circuit boards 10 of various lengths and sizes, and the installation flexibility is strong, which reduces the investment in mold costs in the later product development; in addition, since the opposite ends of the inductive switch circuit board 10 in the left-right direction do not need to be provided with hanging ears, that is, the left and right space of the inductive switch circuit board 10 is not occupied, the display area is more adjustable; in addition, since the opposite ends of the inductive switch circuit board 10 in the left-right direction do not need to be provided with hanging ears, it can save materials and reduce costs.

[0039] See also Figure 3 and Figure 4, in some embodiments, a light-transmitting plate 41 is provided on the operation panel 40, a window 31 arranged in alignment with the light-transmitting plate 41 is provided on the back plate 30, and the inductive switch circuit board 10 is arranged in alignment with the window 31. In this way, the inductive switch circuit board 10 can be observed outside the operation panel 40, facilitating various functional operations.

[0040] In some embodiments, in order to observe each functional display area of the inductive switch circuit board 10, the light-transmitting plate 41 and the window 31 can completely cover the inductive switch circuit board 10. Optionally, the shapes of the window 31 and the light-transmitting plate 41 are set according to the shape of the inductive switch circuit board 10. As an example, when the inductive switch circuit board 10 is set as a rectangle, the contour shapes of the window 31 and the light-transmitting sheet are correspondingly set as rectangles.

[0041] Please refer to Figures 2 to 4 , in some embodiments, the connection position between the protective cover 20 and the back plate 30, that is, the connection position between the connection part 21 and the support part 32 in the following text, needs to avoid the inductive switch circuit board 10. Specifically, for example, it is located in the peripheral area of the inductive switch circuit board 10, which can be a circumferentially arranged connection position, or multiple connection positions arranged discontinuously or on different sides. More specifically, there are two connection positions between the protective cover 20 and the back plate 30, and the two connection positions are respectively located on the opposite two side parts of the inductive switch circuit board 10 in the left-right direction.

[0042] In one embodiment, a support part 32 is provided on the back plate 30. The protective cover 20 is provided with a connection part 21 corresponding to the position of the support part 32 and connected to each other. The support part 32 and the connection part 21 are located in the peripheral area of the inductive switch circuit board 10. In this way, the connection between the connection part 21 and the support part 32 realizes the fixed connection between the protective cover 20 and the back plate 30; in addition, both the support part 32 and the connection part 21 are located in the peripheral area of the inductive switch circuit board 10, so as not to interfere with the inductive switch circuit board 10.

[0043] Please refer to Figures 2 to 4 , in one embodiment, there are two support parts 32 and two connection parts 21, and the two connection parts 21 are connected to the two support parts 32 in one-to-one correspondence. The two support parts 32 and the two connection parts 21 are respectively located on the opposite sides of the inductive switch circuit board 10. In this way, the back plate 30 and the protective cover 20 can be stably assembled together.

[0044] Of course, in some alternative solutions, the numbers of the support part 32 and the connection part 21 can also be one, three, four or other numbers, which can be flexibly adjusted and set according to actual needs and are not limited here.

[0045] Please refer to Figures 2 to 4, in some embodiments, the connection between the connecting portion 21 and the supporting portion 32 includes, but is not limited to, fastening connection by various fasteners 50 such as screws, bolts, pins, rivets, and snap connectors, or fixed connection by means of bonding, welding, etc. In this embodiment, the supporting portion 32 is provided with a first mounting hole, and the connecting portion 21 is provided with a second mounting hole corresponding to the position of the first mounting hole. The switch assembly of the range hood further includes a fastener 50, and the fastener 50 passes through the first mounting hole and the second mounting hole to fixedly connect the connecting portion 21 and the supporting portion 32.

[0046] Please refer to Figures 2 to 4 , in one embodiment, the supporting portion 32 is a protruding portion protruding from the back plate 30 towards the protective cover 20, and the connecting portion 21 is a recessed portion recessed inside the protective cover 20 on the protective cover 20. In this way, the supporting portion 32 and the back plate 30 can be designed as an integral structure, and the connecting portion 21 and the protective cover 20 can be designed as an integral structure. In this way, there is no need to separately configure parts, which can reduce the number of parts, thereby making the structure simple, convenient to manufacture, and reducing material costs. Moreover, the setting of the protruding portion can prevent the back plate 30 from being damaged when the supporting portion 32 and the connecting portion 21 are connected, and maintain the strength and flatness of the back plate 30; the setting of the recessed portion can facilitate the fastener 50 to pass through the bottom of the recessed portion when the supporting portion 32 and the connecting portion 21 are connected, and facilitate the connection between the supporting portion 32 and the connecting portion 21. In addition, the supporting portion 32 and the connecting portion 21 are in contact with each other by means of surface contact, for example, which can make the connection between the two firm.

[0047] In some embodiments, the "supporting portion 32" can be "a part of the back plate 30", that is, the "supporting portion 32" and the "other parts of the back plate 30" are integrally formed; it can also be an independent component separable from the "other parts of the back plate 30", that is, the "supporting portion 32" can be independently manufactured and then combined with the "other parts of the back plate 30" into a whole.

[0048] In some embodiments, the "connecting portion 21" can be "a part of the protective cover 20", that is, the "connecting portion 21" and the "other parts of the protective cover 20" are integrally formed; it can also be an independent component separable from the "other parts of the protective cover 20", that is, the "connecting portion 21" can be independently manufactured and then combined with the "other parts of the protective cover 20" into a whole.

[0049] In some embodiments, the supporting portion 32 is integrally formed by stamping the back plate 30. Similarly, the connecting portion 21 is integrally formed by stamping the protective cover 20.

[0050] In one embodiment, the support portion 32 includes a first support arm 321, a connecting arm 322, and a second support arm 323 that are connected in sequence. The connecting arm 322 is disposed at an angle with respect to the first support arm 321 and the second support arm 323 respectively, and the connecting arm 322 is connected to the connecting portion 21. The connecting portion 21 is a groove recessed inside the protective cover 20.

[0051] Of course, in some alternative solutions, the support portion 32 may also be a separate part independent of the back plate 30 and connected to the back plate 30; similarly, the connecting portion 21 may also be a separate part independent of the protective cover 20 and connected to the protective cover 20.

[0052] It should be noted that the connection position between the protective cover 20 and the rear part of the inductive switch circuit board 10 can be flexibly adjusted and set according to actual requirements, including but not limited to the top side, bottom side, left side, or right side of the rear part of the inductive switch circuit board 10, etc. In addition, the connection method between the protective cover 20 and the rear part of the inductive switch circuit board 10 includes but not limited to being firmly connected by various connecting members 60 such as screws, bolts, pins, rivets, and snap connectors, or being fixedly connected by bonding, welding, etc.

[0053] Please refer to Figure 2 、 Figure 5 and Figure 6 , in one embodiment, fixing posts 11 are provided at the rear part of the inductive switch circuit board 10, and first assembly holes 111 are formed on the fixing posts 11. Second assembly holes 22 corresponding to the positions of the first assembly holes 111 are formed on the protective cover 20. The switch assembly of the range hood further includes a connecting member 60. The connecting member 60 passes through the second assembly hole 22 and the first assembly hole 111 to fixedly connect the protective cover 20 to the fixing posts 11. In this way, by providing the fixing posts 11 at the rear part of the inductive switch circuit board 10, the distance between the opposite ends of the fixing posts 11 determines the depth of the first assembly holes 111, and can be flexibly adjusted and set according to the length of the connecting member 60. Furthermore, it is not necessary to increase the thickness of the entire back of the inductive switch circuit board 10, that is, it can play a role in saving materials and reducing costs.

[0054] In some examples, the connecting member 60 is a screw, the first assembly hole 111 is a threaded hole corresponding to the screw, and the second assembly hole 22 is provided as a through hole.

[0055] Among them, the number of the connecting member 60, the first assembly hole 111, and the second assembly hole 22 is the same, for example, one, two, three, or other numbers, which are not limited herein.

[0056] Please refer to Figure 2 and Figure 6, in one embodiment, a pressing portion 23 is provided on the protective cover 20 and abuts against the rear portion of the inductive switch circuit board 10. The pressing portion 23 is a convex bump protruding towards the inductive switch circuit board 10. Specifically, the contact portion between the pressing portion 23 and the inductive switch circuit board 10 is a surface contact. In this way, the protective cover 20 presses against the rear portion of the inductive switch circuit board 10 through the pressing portion 23, which can improve the installation stability of the inductive switch circuit board 10 and the flatness of the inductive switch circuit board 10.

[0057] In some embodiments, the number of the pressing portions 23 includes but is not limited to one, two, three or more, and the specific number is flexibly adjusted and set according to actual needs. In a specific embodiment, when multiple pressing portions 23 are provided, the contact positions of each pressing portion 23 with the rear portion of the inductive switch circuit board 10 are on the same plane, so as to ensure synchronous abutment with the rear portion of the inductive switch circuit board 10.

[0058] Please refer to Figure 2 and Figure 6 , in one embodiment, the protective cover 20 includes a panel 24 opposite to the inductive switch circuit board 10 and a surrounding plate 25 connected to the panel 24. A flanging 251 that folds towards the inside of the protective cover 20 is provided at one end of the surrounding plate 25 away from the panel 24. In this way, the flanging 251 can increase the structural strength of the protective cover 20, and there is no step on the outside, making the appearance more beautiful.

[0059] Please refer to Figures 1 to 3 , in one embodiment, an oil fume extractor includes the switch assembly of the oil fume extractor in any of the above embodiments, and further includes an operation panel 40, and a back plate 30 is fixedly installed on the inner wall of the operation panel 40.

[0060] For the above-mentioned oil fume extractor, during assembly, the rear portion of the inductive switch circuit board 10 is connected to the protective cover 20 and installed inside the protective cover 20, and then the protective cover 20 is installed on the back plate 30. It can be seen that there is no need to provide hanging ears at the opposite ends of the inductive switch circuit board 10 in the left-right direction and adopt the installation method of installing on the fixed bracket of the back plate with hanging ears, so the installation flexibility is stronger, and the investment in mold costs in later product development is reduced; in addition, since there is no need to provide hanging ears at the opposite ends of the inductive switch circuit board 10 in the left-right direction, that is, the left and right spaces of the inductive switch circuit board 10 are not occupied, so the adjustability of the display area is greater, thus it can adapt to the installation of various inductive switch circuit boards 10 with different lengths and sizes; in addition, since there is no need to provide hanging ears at the opposite ends of the inductive switch circuit board 10 in the left-right direction, materials can be saved and the cost can be reduced.

[0061] In the description of the present application, it should be understood that if there are terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present application.

[0062] In addition, if there are terms such as "first" and "second", these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present application, if there is a term "plurality", the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0063] In the present application, unless otherwise clearly specified and defined, if there are terms such as "install", "connect", "couple", "fix", etc., these terms should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0064] In the present application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, the meaning may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0065] It should be noted that if an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. If an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are only for illustrative purposes and do not represent the only implementation.

[0066] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0067] The above-described embodiments only represent several implementation manners of the present application. The description is relatively specific and detailed, but it should not be construed as a limitation to the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A switch assembly of a range hood, characterized in that, The switch assembly of the range hood comprises: a capacitive switch circuit board (10); a protective cover (20) which covers the outside of the capacitive switch circuit board (10) and is fixedly connected to the rear part of the capacitive switch circuit board (10); and a back plate (30) which is fixedly installed on the inner wall of the operation panel (40) of the range hood, and is fixedly connected to the protective cover (20), and the two enclose the capacitive switch circuit board (10).

2. The switch assembly of the range hood according to claim 1, characterized in that, A support portion (32) is provided on the back plate (30), and the protective cover (20) is provided with a connecting portion (21) corresponding to the position of the support portion (32) and connected thereto; the support portion (32) and the connecting portion (21) are located in the peripheral area of the capacitive switch circuit board (10).

3. The switch assembly of the range hood according to claim 2, characterized in that, There are two support portions (32) and two connecting portions (21), and the two connecting portions (21) are connected to the two support portions (32) in one-to-one correspondence; the two support portions (32) and the two connecting portions (21) are respectively located on opposite sides of the capacitive switch circuit board (10).

4. The switch assembly of the range hood according to claim 2, wherein, The support portion (32) is a protruding portion protruding from the back plate (30) towards the protective cover (20), and the connecting portion (21) is a recessed portion recessed into the protective cover (20); and / or, the contact portion between the support portion (32) and the connecting portion (21) is a surface contact.

5. The switch assembly of the range hood according to claim 4, wherein The support portion (32) includes a first support arm (321), a connecting arm (322) and a second support arm (323) connected in sequence, the connecting arm (322) is disposed at an angle to the first support arm (321) and the second support arm (323) respectively, and the connecting arm (322) is connected to the connecting portion (21); the connecting portion (21) is a groove recessed into the protective cover (20).

6. The switch assembly of the range hood according to claim 1, characterized in that, Fixing posts (11) are provided at the rear part of the capacitive switch circuit board (10), first assembly holes (111) are formed on the fixing posts (11), second assembly holes (22) corresponding to the positions of the first assembly holes (111) are formed on the protective cover (20), and the switch assembly of the range hood further includes a connecting member (60) which passes through the second assembly holes (22) and the first assembly holes (111) to fixedly connect the protective cover (20) to the fixing posts (11).

7. The switch assembly of the range hood according to claim 1, characterized in that, A pressing portion (23) which abuts against the rear part of the capacitive switch circuit board (10) is provided on the protective cover (20); the pressing portion (23) is a convex bump protruding towards the capacitive switch circuit board (10); the contact portion between the pressing portion (23) and the capacitive switch circuit board (10) is a surface contact.

8. The switch assembly of the range hood according to any one of claims 1 to 7, characterized in that, The protective cover (20) includes a panel (24) disposed opposite to the inductive switch circuit board (10) and a surrounding plate (25) connected to the panel (24). One end of the surrounding plate (25) away from the panel (24) is provided with a flanging (251) that is turned over towards the inside of the protective cover (20).

9. A range hood, characterized in that, The range hood includes the switch assembly of the range hood according to any one of claims 1 to 8, and further includes an operation panel (40). The back plate (30) is fixedly installed on the inner wall of the operation panel (40).

10. The range hood according to claim 9, characterized in that, A light-transmitting plate (41) is provided on the operation panel (40). A window (31) arranged in alignment with the light-transmitting plate (41) is provided on the back plate (30). The inductive switch circuit board (10) is arranged in alignment with the window (31).

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