Switch panel and range hood

Abstract

The utility model relates to a switch panel and a range hood, and the switch panel comprises a lower housing, the top of which is provided with an opening; the upper shell covers the top opening of the lower shell, and a placement cavity is defined by the upper shell and the lower shell; the circuit board is arranged in the placement cavity; the upper shell comprises an upper shell body and an operation panel arranged at the top of the upper shell body, the top of the upper shell body is provided with a placing concave area which is concave downwards and used for placing the operation panel, and an annular step part which protrudes upwards and is suitable for being connected with the operation panel in an ultrasonic welding mode is further constructed at the peripheral edge of the bottom wall of the placing concave area; an annular caulking groove is formed in the peripheral edge of one of the upper shell and the lower shell, an annular inserting piece capable of being inserted into the annular caulking groove is arranged on the peripheral edge of the other one of the upper shell and the lower shell, and a sealing piece in sealing contact with the annular inserting piece is further arranged in the annular caulking groove. The utility model has the advantages of reasonable structural design, good sealing performance, capability of preventing water vapor from entering and prolonged service life.

Description

Technical Field

[0001] The utility model relates to the technical field of switch panels, in particular to a switch panel and a range hood. Background Art

[0002] A range hood is a kitchen appliance that purifies the kitchen environment. With the demand for intelligent control of range hoods, a touch-sensitive switch panel is usually installed on the front of the range hood body. This switch panel can be used to select or switch various functions such as turning the range hood on and off (touch control, hand gesture control), adjusting the gear position, etc.

[0003] For example, the Chinese utility model patent application with application number CN201920963804.X (authorization announcement number: CN210891807U) discloses a range hood display panel box and a range hood, wherein the range hood display panel box includes: an upper cover and a lower box, and also includes: a first positioning rib formed on the upper cover, which is arranged along the circumference of the upper cover; a second positioning rib formed on the upper cover, which is arranged along the circumference of the upper cover, parallel to the first positioning rib and with an insertion portion formed between the first positioning rib, and the upper cover is inserted and matched with the side wall of the lower box through the insertion portion; a limiting hook formed on the second positioning rib; a limiting convex edge formed around the outer side surface of the lower box, used to abut against the bottom of the first positioning rib to limit the downward movement of the upper cover; a clamping portion formed on the inner side surface of the lower box, used to clamp and match with the limiting hook to limit the upward movement of the upper cover.

[0004] The display panel box (switch panel) of the above-mentioned range hood still has certain shortcomings. This display panel box is simply assembled by snap-fitting (limiting hook and snap-fitting part), which cannot achieve a good waterproof effect. It is easy to cause the internal PCB board to be invaded by water vapor, reducing its service life; on the other hand, the overall strength of the switch panel and the reliability of the assembly connection are relatively limited due to the snap-fit connection. Utility Model Content

[0005] The first technical problem to be solved by the present invention is to provide a switch panel with good sealing performance and reasonable structural design in view of the current status of the existing technology.

[0006] The second technical problem to be solved by the present invention is to provide a range hood using the above-mentioned switch panel in view of the current status of the existing technology.

[0007] The technical solution adopted by the present invention to solve the first technical problem is: a switch panel, comprising:

[0008] a lower shell having an open top;

[0009] An upper shell, covering the top opening of the lower shell and defining a placement chamber together with the lower shell;

[0010] A circuit board is arranged in the placement chamber;

[0011] The upper shell includes an upper shell body and an operating panel arranged on the top of the upper shell body. The top of the upper shell body has a downwardly recessed placement area for placing the operating panel. The outer peripheral edge of the bottom wall of the placement area is also constructed with an upwardly protruding annular step portion suitable for connecting to the operating panel by ultrasonic welding. An annular groove is provided on the outer peripheral edge of one of the upper shell and the lower shell, and an annular insert that can be inserted into the annular groove is provided on the outer peripheral edge of the other component. A sealing member is also provided in the annular groove to be in sealing contact with the annular insert.

[0012] In order to facilitate assembly, the annular embedding groove is provided on the lower shell, and the annular insert is provided on the upper shell.

[0013] In order to simplify the structure of the lower shell, the lower shell includes a bottom wall and a first annular side wall extending upward from the outer periphery of the bottom wall. The top of the first annular side wall has a first annular plate and a second annular plate arranged in sequence along the inner and outer directions. The gap between the above-mentioned first annular plate and the second annular plate constitutes the annular groove.

[0014] In order to reserve space for placing other components (such as a touch spring), the upper shell includes a top wall and a second annular side wall extending downward from the outer periphery of the top wall. The bottom edge of the first annular side wall can be embedded in the annular groove, thereby forming the annular insert.

[0015] In order to ensure the reliability of the installation of the upper and lower shells and the sealing of the two at the assembly joint, the second annular side wall also has a first limit stop portion extending inward and a second limit stop portion extending outward near its bottom edge. When the bottom edge of the first annular side wall is installed in place in the annular groove, the first limit stop portion and the second limit stop portion respectively abut against the top of the first annular plate and the second annular plate.

[0016] In order to further improve the sealing performance of the upper and lower shells at the joint position, the height of the top of the first annular plate is higher than the height of the top of the second annular plate, and correspondingly, the height of the first limit stop on the second annular side wall is higher than the height of the second limit stop.

[0017] In order to achieve firm fixation of the upper and lower shells and the circuit board, the top wall of the upper shell is also provided with a downward extending connecting column, and the bottom wall of the lower shell is also provided with an upward extending support column at a position opposite to the connecting column. The support column is axially hollow to form an axial hole for a screw to pass through. The circuit board is pressed between the support column and the connecting column, and the above-mentioned screw passes through the axial hole and the circuit board and is connected to the connecting column.

[0018] As an improvement, the circuit board is also provided with a gesture sensing module for identifying gesture movements. The gesture sensing module includes a transmitting tube and a receiving tube arranged at intervals. The top wall of the upper shell is provided with a first protective cover extending downward and correspondingly covering the outside of the transmitting tube, and a second protective cover extending downward and correspondingly covering the outside of the receiving tube. The top wall of the upper shell is also provided with a first operating window that is in communication with the interior space of the first protective cover, and a second operating window that is in communication with the interior space of the second protective cover. The structural design of the above-mentioned first and second protective covers can, on the one hand, directly block the transmitting tube and the receiving tube (to prevent crosstalk and affect the function), and on the other hand, prevent deformation, thereby achieving the purpose of fixing the corresponding components, thereby ensuring that they are facing the operating windows.

[0019] To simplify the switch panel structure and reduce costs, the operating panel features a first light-transmitting area opposite the first operating window and a second light-transmitting area opposite the second operating window. The back of the operating panel is coated with an infrared-transmitting ink layer in these first and second light-transmitting areas. This ink layer eliminates the need for applying infrared-transmitting film, facilitating production and reducing costs.

[0020] As an improvement, a touch spring is also provided on the circuit board, and a through-hole is provided in the recessed area of the upper housing body. The lower end of the touch spring is connected to the circuit board, and the upper end passes through the through-hole to abut against the bottom wall of the operation panel. The through-hole is used to secure the spring and prevent deformation, and to maintain stress on the upper housing, ensuring that it does not deform when in contact with the operation panel.

[0021] As an improvement, the switch panel is elongated, with at least two touch springs arranged along the length of the circuit board. The upper housing also has at least two corresponding perforations in the recessed area. The width of the elongated switch panel is generally less than 3 cm, preferably 2 cm. The relatively narrow design of the switch panel not only meets the minimalist design requirements of the range hood, but also ensures overall strength and reduces deformation.

[0022] The technical solution adopted by the present invention to solve the second technical problem is: a range hood, comprising a casing and a switch panel arranged on the casing, wherein the switch panel adopts the above-mentioned switch panel.

[0023] Compared with existing technologies, this utility model has the following advantages: The switch panel of this utility model has an upper and lower shell assembled through an annular groove and an annular insert, and a seal is provided at the joint between the two, improving its sealing and preventing moisture from entering the interior. Furthermore, the operating panel of the upper shell is placed in a recessed area at the top of the upper shell body and is fixed at the outer edge by ultrasonic welding, further ensuring the overall sealing of the switch panel and extending the service life of the switch panel. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the three-dimensional structure of the switch panel of an embodiment of the present utility model;

[0025] Figure 2 This is an exploded view of the switch panel of an embodiment of the present utility model;

[0026] Figure 3 This is a cross-sectional view of a switch panel according to an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of the three-dimensional structure of the back side of the upper shell of an embodiment of the present utility model. DETAILED DESCRIPTION

[0028] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0029] In the specification and claims of the present invention, directional terms such as "front," "back," "up," "down," "left," "right," "side," "top," and "bottom" are used to describe various exemplary structural parts and components of the present invention. However, these terms are used herein for convenience of description only and are based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different orientations, these directional terms are intended for illustrative purposes only and should not be construed as limiting. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

[0030] Figures 1-4 A preferred embodiment of the switch panel and range hood of the present invention is shown. The switch panel includes an upper housing 20, a lower housing 10, and a circuit board 30. The upper housing 20 and the lower housing 10 are covered together to form a placement chamber for accommodating the circuit board 30.

[0031] See also Figure 3The lower shell 10 includes a bottom wall 11 and a first annular sidewall 12 extending upward from the outer periphery of the bottom wall 11. The upper shell 20 includes a top wall 211 and a second annular sidewall 212 extending downward from the outer periphery of the top wall 211. The top of the first annular sidewall 12 of the lower shell 10 has a first annular plate 121 and a second annular plate 122 spaced apart in the inward and outward directions. The gap between the first annular plate 121 and the second annular plate 122 forms an annular groove 120. A seal 4 is installed in the annular groove 120. The bottom edge of the first annular sidewall 12 of the upper shell 20 can be inserted into the annular groove 120 and pressed against the seal 4 to ensure sealing at the joint between the upper and lower shells 10. The bottom edge of the first annular sidewall 12 of the upper shell 20 also serves as an annular insert 217.

[0032] The second annular sidewall 212 further has a first stopper 213 extending inward and a second stopper 214 extending outward near its bottom edge. When the bottom edge of the first annular sidewall 12 is properly installed in the annular groove 120, the first stopper 213 and the second stopper 214 respectively abut against the tops of the first annular plate 121 and the second annular plate 122. The top of the first annular plate 121 is higher than the top of the second annular plate 122. Correspondingly, the first stopper 213 on the second annular sidewall 212 is higher than the second stopper 214. This structural design ensures a relatively long contact distance between the bottom edge of the first annular sidewall 12 of the upper housing 20 and the annular groove 120 of the lower housing 10, significantly improving the sealing performance at the joint between the two.

[0033] The switch panel is generally long and narrow. The width of the long switch panel is generally less than 3 cm, preferably 2 cm. The relatively narrow design of the switch panel not only meets the minimalist design requirements of the range hood, but also ensures the overall strength of the switch panel and reduces deformation and other problems.

[0034] Combine Figure 4 The top wall 211 of the upper shell 20 also has a connecting column 218 extending downward, and the bottom wall 11 of the lower shell 10 also has a supporting column 13 extending upward at a position opposite to the connecting column 218. The supporting column 13 is axially hollow to form a shaft hole 130 for a screw to pass through. During assembly, the circuit board 30 is pressed between the supporting column 13 and the connecting column 218, and the three are fixed by screws. Specifically, the screws pass through the shaft hole 130 of the supporting column 13 and the circuit board 30 and are connected to the connecting column 218. Figure 4As shown, two connecting posts 218 are provided at each end of the upper shell 20 in the longitudinal direction, and correspondingly, two supporting posts 13 are provided at each end of the lower shell 10 in the longitudinal direction. A connecting post 218 is further provided in the middle of the length of the upper shell 20, and a supporting post 13 is provided in the middle of the length of the lower shell 10.

[0035] See also Figure 2 The upper housing 20 of this embodiment includes an upper housing body 21 and an operating panel 22 disposed on the top of the upper housing body 21. The top of the upper housing body 21 has a downwardly recessed placement area 215 for accommodating the operating panel 22. The depth of the placement area 215 is substantially the same as the thickness of the aforementioned operating panel 22. An upwardly protruding annular step 216 is also formed at the outer edge of the bottom wall 11 of the placement area 215. After the operating panel 22 is properly positioned within the placement area 215 of the upper housing body 21, the outer edge of the operation panel 22 mates with the annular step 216 of the upper housing body 21, and the two are connected by ultrasonic welding.

[0036] The outer edge of the placement recess 215 of the upper shell body 21 also has a positioning protrusion 2150 protruding into the placement recess 215. The above-mentioned operation panel 22 is provided with a positioning groove 220 at a corresponding position. When installing the operation panel 22, the positioning groove 220 and the positioning protrusion 2150 can be aligned to avoid the two ends of the operation panel 22 in the length direction from being reversed, thereby realizing a fool-proof design.

[0037] A touch spring 31 is provided on the circuit board 30. Figure 3 Five touch springs 31 are shown, spaced apart along its length. The recessed area 215 of the upper housing 21 also includes a through-hole 203 extending vertically through it. The lower end of each touch spring 31 connects to the circuit board 30, while the upper end passes through the through-hole 203 of the upper housing 21 and connects to the bottom wall 11 of the operating panel 22. These through-holes 203 serve to secure the springs and prevent deformation. Furthermore, they provide stress relief in the upper housing 20, ensuring that the springs remain stable in contact with the operating panel 22.

[0038] The circuit board 30 is also provided with a gesture sensing module for identifying gesture movements. There are two groups of gesture sensing modules, which are arranged at the left and right end positions of the circuit board 30 respectively. Specifically, each gesture sensing module includes a transmitting tube 321 and a receiving tube 322 arranged at intervals. The top wall 211 of the upper shell 20 is provided with a first protective cover 2191 and a second protective cover 2192 extending downward. After the upper shell 20, the lower shell 10 and the circuit board 30 are assembled in place, the end of the first protective cover extends to the wall surface of the main body of the circuit board 30, and the corresponding cover is set outside the transmitting tube 321. Similarly, the end of the second protective cover extends to the wall surface of the main body of the circuit board 30, and the corresponding cover is set outside the receiving tube 322. After the above-mentioned protective cover is set, on the one hand, it can directly block the transmitting tube 321 and the receiving tube 322 (to prevent crosstalk and affect the function), and on the other hand, it can prevent deformation, thereby achieving the purpose of fixing the corresponding components, thereby ensuring that they are facing the operation window.

[0039] The top wall 211 of the upper housing 20 also defines a first operating window 201, which intersects the interior of the first protective cover 2191, and a second operating window 202, which intersects the interior of the second protective cover 2192. The operating panel 22 includes a first light-transmitting area opposite the first operating window 201 and a second light-transmitting area opposite the second operating window 202. The back of the operating panel 22 is provided with an ink layer that allows infrared light to pass through, located in the first and second light-transmitting areas. This oil film treatment eliminates the need for applying infrared-transmitting film, facilitating production and reducing costs.

[0040] This embodiment also relates to a range hood, comprising a housing and a switch panel provided on the housing, wherein the switch panel adopts the above-mentioned switch panel. Figure 1 The connecting bracket 5 shown in FIG is fixed on the casing.

Claims

1. A switch panel, comprising: A lower housing (10) having an open top; An upper shell (20) covers the top opening of the lower shell (10) and defines a placement chamber together with the lower shell (10); A circuit board (30) is arranged in the placement chamber; The invention is characterized in that: the upper shell (20) includes an upper shell body (21) and an operating panel (22) arranged on the top of the upper shell body (21); the top of the upper shell body (21) has a downwardly recessed placement area (215) for placing the operating panel (22); the outer peripheral edge of the bottom wall (11) of the placement area (215) is also constructed with an upwardly protruding annular step portion (216) suitable for connecting to the operating panel (22) by ultrasonic welding; an annular groove (120) is provided on the outer peripheral edge of one of the upper shell (20) and the lower shell (10); an annular insert (217) capable of being inserted into the annular groove (120) is provided on the outer peripheral edge of the other part; and a sealing member (4) is also provided in the annular groove (120) for sealing contact with the annular insert (217).

2. The switch panel according to claim 1, characterized in that: The annular embedding groove (120) is provided on the lower shell (10), and the annular insert (217) is provided on the upper shell (20).

3. The switch panel according to claim 2, characterized in that: The lower shell (10) includes a bottom wall (11) and a first annular side wall (12) extending upward from the outer periphery of the bottom wall (11). The top of the first annular side wall (12) has a first annular plate (121) and a second annular plate (122) arranged in sequence along the inner and outer directions. The gap between the first annular plate (121) and the second annular plate (122) constitutes the annular embedding groove (120).

4. The switch panel according to claim 3, characterized in that: The upper shell (20) includes a top wall (211) and a second annular side wall (212) extending downward from the outer periphery of the top wall (211). The bottom edge of the first annular side wall (12) can be embedded in the annular groove (120), thereby forming the annular insert (217).

5. The switch panel according to claim 4, characterized in that: The second annular side wall (212) further has a first limit stop portion (213) extending inward and a second limit stop portion (214) extending outward adjacent to its bottom edge. When the bottom edge of the first annular side wall (12) is installed in place in the annular embedding groove (120), the first limit stop portion (213) and the second limit stop portion (214) respectively abut against the top of the first annular plate (121) and the second annular plate (122).

6. The switch panel according to claim 5, characterized in that: The height of the top of the first annular plate (121) is higher than the height of the top of the second annular plate (122), and correspondingly, the height of the first limit stop (213) on the second annular side wall (212) is higher than the height of the second limit stop (214).

7. The switch panel according to claim 4, characterized in that: The top wall (211) of the upper shell (20) is also provided with a connecting column (218) extending downward, and the bottom wall (11) of the lower shell (10) is also provided with a supporting column (13) extending upward at a position opposite to the connecting column (218), the supporting column (13) is axially hollow to form an axial hole (130) for a screw to pass through, the circuit board (30) is pressed between the supporting column (13) and the connecting column (218), and the screw passes through the axial hole (130) and the circuit board (30) to be connected to the connecting column (218).

8. The switch panel according to claim 4, characterized in that: The circuit board (30) is also provided with a gesture sensing module for identifying gesture actions, and the gesture sensing module includes a transmitting tube (321) and a receiving tube (322) arranged at intervals. The top wall (211) of the upper shell (20) is provided with a first protective cover (2191) extending downward and capable of correspondingly covering the outside of the transmitting tube (321), and a second protective cover (2192) extending downward and capable of correspondingly covering the outside of the receiving tube (322). The top wall (211) of the upper shell (20) is also provided with a first operating window (201) communicating with the internal space of the first protective cover (2191), and a second operating window (202) communicating with the internal space of the second protective cover (2192).

9. The switch panel according to claim 8, characterized in that: The operating panel (22) has a first light-transmitting area opposite to the first operating window (201) and a second light-transmitting area opposite to the second operating window (202), and an ink layer capable of allowing infrared light to pass through is provided on the back of the operating panel (22) at the first light-transmitting area and the second light-transmitting area.

10. The switch panel according to any one of claims 1 to 9, characterized in that: The circuit board (30) is further provided with a touch spring (31), and the placement recess (215) of the upper shell body (21) is further provided with a through hole (203) that passes through from top to bottom. The lower end of the touch spring (31) is connected to the circuit board (30), and the upper end passes through the through hole (203) and abuts against the bottom wall (11) of the operation panel (22).

11. The switch panel according to claim 10, characterized in that: The switch panel is in the shape of an elongated strip as a whole, and there are at least two touch springs (31) arranged in sequence along the length direction of the circuit board (30), and there are also at least two corresponding through holes (203) on the placement concave area (215) of the upper shell body (21).

12. A range hood comprising a housing and a switch panel provided on the housing, characterized in that: The switch panel is the switch panel according to any one of claims 1 to 11.

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