Transparent touch switch for range hood and range hood thereof

Abstract

The utility model relates to the technical field of touch control switches, in particular to a transparent touch control switch for a range hood, which comprises a transparent touch control panel, a control circuit board and a light-emitting part, icons are arranged on the transparent touch control panel, the light-emitting part is arranged on the control circuit board, and the control circuit board is arranged on the transparent touch control panel. Light rays can be emitted in the direction perpendicular to the plane where the control circuit board is located; the orthographic projection of the light-emitting part on the transparent touch panel is overlapped with the orthographic projection of an icon of the transparent touch panel on the control circuit board, and light emitted by the light-emitting part can enter the transparent touch panel and illuminate the icon. By adopting the touch control switch, most of the light rays of the lamp beads can enter the transparent touch control panel to illuminate the icon, and the display brightness of the icon of the transparent touch control panel can be higher by using fewer lamp beads, so that the use experience of a user is improved, and the use cost and energy consumption of the transparent touch control switch are also reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of touch switches, in particular to a transparent touch switch for a range hood and the range hood thereof. Background Art

[0002] A range hood, also known as a range hood, is a device that purifies the kitchen environment. It is mainly installed above the stove and is used to quickly remove stove combustion waste and oil fumes generated during the cooking process that are harmful to the human body, thereby reducing pollution and protecting human health.

[0003] Since most of the light from the existing lamp beads on the transparent touch switch used in range hoods does not enter the icons on the touch panel, a large number of lamp beads are required to make the display brightness of the icons on the transparent touch panel higher, thereby improving the user experience. However, using a large number of lamp beads will increase the cost and energy consumption of the transparent touch switch.

[0004] Therefore, it is necessary to develop a transparent touch switch for range hood and range hood thereof to solve the above problems. Utility Model Content

[0005] In order to solve the above problems, the purpose of the present invention is to provide a transparent touch switch for a range hood and the range hood thereof.

[0006] The utility model is realized by the following technical solutions:

[0007] A transparent touch switch comprises: a transparent touch panel, a control circuit board, and a light-emitting element, wherein the transparent touch panel is provided with an icon, and the light-emitting element is arranged on the control circuit board and can emit light in a direction perpendicular to the plane where the control circuit board is located;

[0008] The orthographic projection of the upper edge of the transparent touch panel on the control circuit board coincides with the light-emitting element.

[0009] In one possible embodiment, an icon is provided on the transparent touch panel, the orthographic projection of the light-emitting element on the transparent touch panel overlaps with the orthographic projection of the icon of the transparent touch panel on the control circuit board, and the light emitted by the light-emitting element can penetrate into the transparent touch panel and illuminate the icon.

[0010] In a possible implementation, the switch further includes a shading member, the light-emitting member is embedded in the shading member, and the shading member can reduce an emission angle of the light-emitting member.

[0011] In a possible implementation manner, the shading member is wrapped around the light emitting member, and the height of the shading member is at least 1.2 times the height of the light emitting member.

[0012] In a possible embodiment, the light-emitting component includes a base and a lamp bead, and the light-shielding component includes a avoidance port and a light-shielding port, the avoidance port is connected to the light-shielding port, and the base can pass through the avoidance port until the lamp bead is located in the light-shielding port, so as to embed the light-emitting component in the light-shielding component.

[0013] In a possible implementation manner, the width of the avoidance opening is greater than the width of the light-shielding opening.

[0014] In a possible implementation, the lamp beads are capable of emitting light along the edge of the light shielding opening to the transparent touch panel;

[0015] The transparent touch panel includes a plurality of icons, and two adjacent icons are arranged on the transparent touch panel at intervals, the two adjacent icons include a first icon and a second icon, the distance between the center line of the first icon and the light is b; the distance between the center of the first icon and the edge of the second icon is c;

[0016] Said b is smaller than c.

[0017] In a possible implementation, the diameter of the icon is d, and b is greater than a preset ratio of d, where the preset ratio is 1 / 2-2 / 3.

[0018] In a possible implementation, the angle between the light and the center line of the lamp bead is θ, the distance between the center of the lamp bead and the transparent touch panel 1 is h1, and the distance between the lamp bead and the center of the icon is h2;

[0019] The width of the light shielding opening is 2a, and the width of the light shielding opening satisfies at least one of the following formulas:

[0020]

[0021] In a possible implementation manner, the light-emitting component is a spherical lamp bead.

[0022] In a possible implementation manner, the control circuit board is provided with a mounting position, the light-emitting component is embedded in the mounting position, and the mounting position can reduce the emission angle of the light-emitting component.

[0023] The utility model also provides a range hood comprising a fan frame, a smoke collecting hood and a transparent touch switch as described in the above embodiment, wherein the transparent touch switch is mounted on a side of the fan frame (100) facing the smoke collecting hood (200).

[0024] The utility model has the following beneficial effects:

[0025] The transparent touch switch for a range hood of the present invention comprises: a transparent touch panel, a control circuit board and a light-emitting component, wherein icons are provided on the transparent touch panel, and the light-emitting component is arranged on the control circuit board and can emit light in a direction perpendicular to the plane where the control circuit board is located; the orthographic projection of the upper edge of the transparent touch panel on the control circuit board coincides with the light-emitting component; by aligning the orthographic projection of the upper edge of the transparent touch panel on the control circuit board with the light-emitting component, most of the light from the lamp beads can enter the transparent touch panel and thus illuminate the icons, and the display brightness of the icons on the transparent touch panel can be higher by using fewer lamp beads, which not only improves the user experience but also reduces the use cost and energy consumption of the transparent touch switch. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions and advantages of the embodiments of the present invention or the prior art, the following is a brief introduction to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0027] Figure 1 : A schematic diagram of the light emission of a transparent touch switch provided in an embodiment of the present disclosure, wherein the transparent touch switch includes a light-shielding member.

[0028] Figure 2 : Figure 1 Magnified view of point A in .

[0029] Figure 3 : A schematic diagram of the light emission of a transparent touch switch provided in an embodiment of the present disclosure, wherein the transparent touch switch does not include a light shielding member.

[0030] Figure 4 : A schematic diagram of the light emission of a transparent touch switch provided in an embodiment of the present disclosure, wherein the transparent touch switch does not include a light shielding member.

[0031] Figure 5 : A schematic structural diagram of a transparent touch switch provided by an embodiment of the present disclosure;

[0032] Figure 6 : A schematic structural diagram of a transparent touch switch provided by an embodiment of the present disclosure;

[0033] Figure 7 : A front view of a transparent touch panel provided by an embodiment of the present disclosure;

[0034] Figure 8 : A side view of a transparent touch panel provided by an embodiment of the present disclosure;

[0035] Figure 9: A cross-sectional view of a transparent touch switch provided by an embodiment of the present disclosure;

[0036] Figure 10 : A schematic structural diagram of the range hood provided in an embodiment of the present disclosure.

[0037] Figure 11 : A schematic structural diagram of the shading element provided in an embodiment of the present disclosure.

[0038] Figure 12 : A schematic structural diagram of the shading element provided in an embodiment of the present disclosure.

[0039] In the figure: 1-transparent touch panel, 10-first part 10, 11-second part 11, 2-control circuit board, 3-housing, 4-light-emitting part, 41-lamp bead, 5-shading part, 51-shading port, 52-avoidance port, 31-front shell, 32-rear shell, 33-clamping part, 34-back plate, 35-sealing part, 36-packaging part, 100-fan rack, 200-smoke hood, 101-first arc-shaped portion, 102-second arc-shaped portion, 103-icon, 104-first transparent layer, 105-first optical adhesive layer, 106-touch layer, 107-second optical adhesive layer, 108-second transparent layer, 109-transverse part, 110-first limiting structure, 111-second limiting structure, 301-mounting groove, 302-glue dispensing groove, 303-first chamfer structure, 304-second chamfer structure, L-light. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, apparatus, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or that are inherent to these processes, methods, products or devices.

[0042] The following describes the embodiments with reference to the accompanying drawings, which do not limit the disclosure of the claims.

[0043] The values ​​in this application can be measured directly or indirectly using a measuring instrument. The projected area can be simulated using a laser or other similar device to simulate the projected boundary, and then the relevant length or angle data can be measured using a measuring instrument, and then the corresponding values ​​can be calculated. Furthermore, the relevant descriptions in this application are all for the range hood in normal use, that is, when the range hood is mounted on a wall.

[0044] The following is combined with Figure 1 The present invention provides a transparent touch switch for a range hood, comprising:

[0045] A transparent touch panel 1, a control circuit board 2 and a light-emitting element 4, wherein an icon 103 is provided on the transparent touch panel 1, and the light-emitting element 4 is arranged on the control circuit board 2 and can emit light in a direction perpendicular to the plane where the control circuit board 2 is located; the orthographic projection of the upper edge of the transparent touch panel 1 on the control circuit board 2 coincides with the light-emitting element 4. In this application, an orthographic projection refers to the projection of the object on the projection surface along a direction perpendicular to the projection surface. By aligning the orthographic projection of the upper edge of the transparent touch panel 1 on the control circuit board 2 with the light-emitting element 4, most of the light from the lamp beads 41 can enter the transparent touch panel 1 and then illuminate the icon 103. Using fewer lamp beads 41 can make the display brightness of the icon 103 of the transparent touch panel 1 higher, which not only improves the user experience, but also reduces the use cost and energy consumption of the transparent touch switch.

[0046] In some embodiments, an icon 103 is provided on the transparent touch panel 1, and the orthographic projection of the light-emitting element 4 on the transparent touch panel 1 overlaps with the orthographic projection of the icon 103 on the control circuit board 2. Light emitted by the light-emitting element 4 can enter the transparent touch panel 1 and illuminate the icon 103. This arrangement further allows the majority of the light from the lamp beads 41 to enter the transparent touch panel 1 and illuminate the icon 103.

[0047] Specifically, a marking area and an unmarked area are provided on the transparent touch panel 1 , and an icon 103 is provided in the marking area.

[0048] In some embodiments, a gap d1 is defined between the transparent touch panel 1 and the control circuit board 2. The range of gap d1 is 0 < d1 ≤ 10 mm. The upper limit of the gap may be, but is not limited to, 10 mm, 9 mm, 8 mm, etc., and the lower limit may be, but is not limited to, 0 mm, 1 mm, 2 mm, etc. It is understood that the gap can also be any value within the aforementioned range, which is not enumerated here. By defining the gap between the transparent touch panel 1 and the control circuit board 2, space is provided for the light-emitting element 4 and the light-shielding element 5.

[0049] In some embodiments, the switch further includes a shading member 5, in which the light emitting member 4 is embedded, and the shading member 5 can reduce the emission angle of the light emitting member 4. This arrangement can greatly improve the distinction between adjacent key patterns on the transparent touch panel 1.

[0050] Specifically, there is a gap d3 between the transparent touch panel 1 and the control circuit board 2, and the range of gap d3 is 2-10mm. The upper limit of the gap between the transparent touch panel 1 and the control circuit board 2 can be, but not limited to, 10mm, 9mm, 8mm, etc., and the lower limit of the gap between the transparent touch panel 1 and the control circuit board 2 can be, but not limited to, 2mm, 3mm, 4mm, etc.; it is understandable that the gap between the transparent touch panel 1 and the control circuit board 2 can also be any point value within the above range, which is not enumerated here. By limiting this gap range, on the one hand, there is space to accommodate the light-shielding member 5, and on the other hand, it can also make the majority of the light emitted by the light-emitting member 4 focus on the transparent touch panel 1.

[0051] In some embodiments, the shading member 5 is wrapped around the light emitting member 4, and the height of the shading member 5 is at least 1.2 times the height of the light emitting member 4. Since the higher the mounting height, the smaller the emission angle will be, and the more concentrated the light will be, the above arrangement can make the light more concentrated.

[0052] In some embodiments, the light-emitting element 4 includes a base and a lamp bead 41, and the light-shielding element 5 includes a clearance opening 52 and a light-shielding opening 51. The clearance opening 52 is connected to the light-shielding opening 51, and the base can pass through the clearance opening 52 until the lamp bead 41 is located in the light-shielding opening 51, thereby embedding the light-emitting element 4 in the light-shielding element 5. Since the light-emitting element 4 is soldered to the control circuit board 2, the clearance opening 52 is required to be provided on the light-shielding element 5 to facilitate assembly so as to accommodate the base of the light-emitting element 4.

[0053] In some embodiments, the width of the avoidance opening 52 is greater than the width of the light shielding opening 51. Since the base of the light emitting element 4 is large in area and the area of ​​the lamp beads 41 is small, in order to embed the light emitting element 4 on the light shielding element 5, the width of the avoidance opening 52 needs to be greater than the width of the light shielding opening 51, which also makes disassembly and installation more convenient.

[0054] In some embodiments, the light shielding member 5 is provided with a plurality of avoidance openings 52 , and the plurality of avoidance openings 52 correspond one-to-one to the plurality of light shielding openings 51 .

[0055] In some embodiments, the light shielding member 5 is provided with a plurality of light shielding openings 51, which correspond to the logo area of ​​the transparent touch panel 1. Specifically, the light shielding openings 51 are arranged above or below the logo area of ​​the transparent touch panel 1. With this arrangement, the light from the light emitting member 4 can be irradiated onto the logo area of ​​the transparent touch panel 1.

[0056] Specifically, the transparent touch switch includes a plurality of light-emitting elements 4 , and the plurality of light-emitting elements 4 corresponds one-to-one to the plurality of light-shielding openings 51 .

[0057] In some embodiments, the shading member 5 includes at least one shading portion, which corresponds to the non-labeled area of ​​the transparent touch panel 1. Specifically, the shading portion is disposed above or below the non-labeled area of ​​the transparent touch panel 1. With this arrangement, the shading portion can block light emitted by the light-emitting element 4, allowing the light to illuminate the labeled area of ​​the transparent touch panel 1. Providing the shading portion on the shading member 5 prevents light from illuminating the non-labeled area of ​​the transparent touch panel 1, improving the distinction between adjacent buttons on the transparent touch panel 1 and thereby enhancing the user experience.

[0058] Specifically, the light shielding member 5 includes a plurality of light shielding portions, each of which is disposed around each light shielding opening 51 to form a plurality of light shielding areas.

[0059] In some embodiments, the shading member 5 includes a first shading layer and a second shading layer, the first shading layer is provided with 4 shading openings 51, 4 shading portions and 4 avoidance openings 52, and the second shading layer is provided with 3 shading openings 51, 3 shading portions and 3 avoidance openings 52.

[0060] In some embodiments, the light shielding element 5 is made of foam or plastic.

[0061] Specifically, the material of the shading element 5 is foam.

[0062] In some embodiments, the shading member 5 is fixedly connected to the control circuit board 2 .

[0063] In some embodiments, such as Figure 1-2 As shown, the lamp beads 41 can emit light L along the edge of the light shielding opening 51 to the transparent touch panel 1;

[0064] The transparent touch panel 1 includes a plurality of icons 103. Two adjacent icons 103 are arranged on the transparent touch panel 1 at intervals. The two adjacent icons 103 include a first icon 103 and a second icon 103. The distance between the center line of the first icon 103 and the light L is b; the distance between the center of the first icon 103 and the edge of the second icon 103 is c.

[0065] b is smaller than c. This setting is adopted to avoid light crosstalk between adjacent icons 103 and improve the key distinction between adjacent icons 103.

[0066] In some embodiments, such as Figure 1 and 2As shown, the diameter of the icon 103 is d, and b is greater than a preset ratio of d, which is 1 / 2-2 / 3. This setting is adopted to avoid the luminous area being too small and thus causing insufficient brightness of the icon 103. Preferably, the preset ratio is 1 / 2.

[0067] In some embodiments, such as Figure 1 and 2 As shown, the angle between the light L and the center line of the lamp bead 41 is θ, the distance between the center of the lamp bead 41 and the transparent touch panel 1 is h1, and the distance between the lamp bead 41 and the center of the icon 103 is h2;

[0068] The width of the light shielding opening 51 is 2a, and the width of the light shielding opening 51 satisfies at least one of the following formulas:

[0069]

[0070] The width of the light shielding opening 51 satisfies the above formula, which can greatly reduce the degree of light crosstalk between adjacent icons 103 and significantly improve the brightness distinction of each icon 103.

[0071] In some embodiments, the light emitting element 4 is a ball-shaped lamp bead. Since the light emitting angle of the ball-shaped lamp bead is smaller than that of ordinary lamp bead, the degree of cross-lighting between adjacent icons 103 is further reduced. Figure 4 As shown, Figure 4 Schematic diagram of the light-emitting angle of the ball-head lamp bead without the shading member 5. The light-emitting angle of the ball-head lamp bead is small, so that the degree of cross-talk between adjacent icons 103 is greatly reduced.

[0072] In some embodiments, the light emitting element 4 is a common lamp bead. The light emitting angle of a common lamp bead is as high as 120 degrees, and it needs to be used in conjunction with the light shielding element 5. Figure 3 As shown, Figure 3 Schematic diagram of the luminous angle of an ordinary lamp bead without a light shielding member 5 . As can be seen from the figure, the luminous angle of the ordinary lamp bead is relatively high, which will cause a serious degree of cross-talk between adjacent icons 103 .

[0073] In some embodiments, the control circuit board 2 is provided with a mounting position, and the light-emitting element 4 is embedded in the mounting position, and the mounting position can reduce the emission angle of the light-emitting element 4. Embedding the mounting element in the mounting position can reduce the emission angle of the light-emitting element 4, thereby improving the key distinction between adjacent icons 103.

[0074] Specifically, a mounting hole is provided on the control circuit board 2 to form a mounting position for mounting the light-emitting element 4 .

[0075] Specifically, a gap d2 is defined between the transparent touch panel 1 and the control circuit board 2. The range of gap d2 is 0 < d2 ≤ 2 mm. It is understood that the gap can be any value within the aforementioned range, which is not enumerated here. By limiting this gap range, the light emitted by the light-emitting element 4 can be largely focused on the transparent touch panel 1.

[0076] In some embodiments, the thickness of the control circuit board 2 is 1-2 mm. It is understandable that the thickness of the control circuit board 2 can be any value within the above range, which is not enumerated here.

[0077] In some embodiments, the control circuit board 2 is provided with a plurality of mounting positions, each of which corresponds to the identification area of ​​the transparent touch panel 1. Specifically, the mounting positions are provided above or below the identification area of ​​the transparent touch panel 1. The mounting positions can illuminate the identification area of ​​the transparent touch panel 1 with light from the light-emitting element 4.

[0078] Specifically, the transparent touch switch includes a plurality of light-emitting elements 4 , and the plurality of light-emitting elements 4 correspond one-to-one to the plurality of installation positions.

[0079] In some embodiments, the mounting position wraps around the light emitting element 4, and the height of the mounting position is at least 1.2 times the height of the light emitting element 4. The higher the height of the mounting position, the smaller the emission angle and the more concentrated the light.

[0080] In some embodiments, the control circuit board 2 is further provided with at least one light-blocking portion, which corresponds to the non-labeling area of ​​the transparent touch panel 1. Specifically, the light-blocking portion is disposed above or below the non-labeling area of ​​the transparent touch panel 1. With this arrangement, the light-blocking portion can block light emitted by the light-emitting element 4, allowing the light to illuminate the labeling area of ​​the transparent touch panel 1. Providing the light-blocking portion on the control circuit board 2 prevents light from illuminating the non-labeling area of ​​the transparent touch panel 1, improving the distinction between adjacent buttons on the transparent touch panel 1 and thereby enhancing the user experience.

[0081] Specifically, the control circuit board 2 includes a plurality of light-shielding portions, each of which is arranged around each mounting position to form a plurality of light-shielding areas.

[0082] In some embodiments, the transparent touch panel 1 further includes a transparent layer, an optical adhesive layer, and a touch layer 106, with the optical adhesive layer being sandwiched between the transparent layer and the touch layer 106. The transparent layer, optical adhesive layer, and touch layer 106 in the transparent touch panel 1 are all light-transmissive, making the transparent touch panel 1 appear transparent as a whole. When applied to a range hood, the resulting transparent touch switch not only enhances the range hood's aesthetics but also improves the user experience.

[0083] In some embodiments, the touch layer 106 can sense the user's finger pressing a key and generate an electrical signal, electrically connecting the control circuit board 2 to the light-emitting element 4 and the transparent touch panel 1. The control circuit board 2 is electrically connected to the light-emitting element 4 and the transparent touch panel 1, so that the control circuit board 2 controls the lighting and extinguishing of the corresponding key mark on the transparent touch panel 1 based on the received electrical signal.

[0084] In some embodiments, the touch layer 106 includes a conductive film and a substrate.

[0085] Specifically, the conductive film includes at least one of an indium tin oxide film, a nanosilver film and a PeDot film, and the substrate is a PET film.

[0086] In some embodiments, the touch layer 106 is ITO glass.

[0087] In some embodiments, the thickness of the touch layer 106 is 0.1-0.2 mm. The upper limit of the thickness of the touch layer 106 may be, but is not limited to, 0.2 mm, 0.19 mm, 0.18 mm, etc., and the lower limit of the thickness of the touch layer 106 may be, but is not limited to, 0.1 mm, 0.11 mm, 0.12 mm, etc. It is understood that the thickness of the touch layer 106 can also be any value within the above range, which is not enumerated here. By limiting the thickness, the sensitivity of the transparent touch switch is guaranteed while also ensuring the strength of the touch layer 106 and increasing its service life.

[0088] In some embodiments, the orthographic projection area of ​​the optical adhesive layer on the control circuit board 2 is smaller than a second preset ratio of the total area of ​​the control circuit board 2, and the second preset ratio is 1 / 200-1 / 100. The upper limit value of the second preset ratio may be, but not limited to, 1 / 100, 2 / 100, 3 / 100, etc., and the lower limit value of the second preset ratio may be, but not limited to, 1 / 200, 2 / 200, 3 / 200, etc.; it can be understood that the second preset ratio can be any point value within the above range, which is not enumerated here. Preferably, the second preset ratio is 1 / 200-1 / 150. Further preferably, the second preset ratio is 1 / 200. With this setting, the orthographic projection area of ​​the transparent touch panel 1 on the control circuit board 2 can be further reduced, thereby allowing more space on the control circuit board 2 to place components.

[0089] In some embodiments, the transparent touch panel 1 further includes a wire, one end of which is connected to the touch layer 106 , and the other end of which is connected to the control circuit board 2 .

[0090] In some embodiments, the transparent touch panel 1 includes a silver paste line, one end of which is connected to the touch layer 106 , and the other end of which extends from the bottom of the touch layer 106 to the control circuit board 2 and is connected to the control circuit board 2 .

[0091] In some embodiments, the thickness ratio between the transparent layer and the optical adhesive layer is 1:(8-12). Preferably, the thickness ratio between the transparent layer and the optical adhesive layer is 1:(9-11). Further preferably, the thickness ratio between the transparent layer and the optical adhesive layer is 1:10. By limiting this thickness ratio, the entire transparent touch panel 1 has a higher strength.

[0092] In some embodiments, the transparent touch panel 1 includes two transparent layers, including a first transparent layer 104 and a second transparent layer 108 . Both the first transparent layer 104 and the second transparent layer 108 are glass transparent layers.

[0093] In some embodiments, the first transparent layer 104 and the second transparent layer 108 are both made of at least one of PC, acrylic, and glass. Preferably, the first transparent layer 104 and the second transparent layer 108 are both made of glass. Using glass as the material for the first transparent layer 104 and the second transparent layer 108 increases the hardness of the transparent touch panel 1 and its high temperature resistance, thereby extending the service life of the transparent touch switch.

[0094] Specifically, the material of the first transparent layer 104 and the second transparent layer 108 includes at least one of blue glass, white glass and ultra-clear glass.

[0095] In some embodiments, the thickness of the optical adhesive layer is 0.125-0.3 mm. The upper limit of the thickness of the optical adhesive layer may be, but is not limited to, 0.3 mm, 0.29 mm, 0.28 mm, etc., and the lower limit of the thickness of the optical adhesive layer may be, but is not limited to, 0.125 mm, 0.126 mm, 0.127 mm, etc.; it is understood that the thickness of the optical adhesive layer can also be any value within the above range, which is not enumerated here. By limiting the thickness of the optical adhesive layer, the touch layer 106 and the transparent layer in the transparent touch panel 1 are more tightly bonded, and the transparent touch panel 1 is more stable.

[0096] In some embodiments, an anti-fingerprint coating is provided on a surface of the first transparent layer 104 away from the touch layer 106 and / or a surface of the second transparent layer 108 away from the touch layer 106 .

[0097] In some embodiments, the transparent touch panel 1 includes two optical adhesive layers, the two optical adhesive layers include a first optical adhesive layer 105 and a second optical adhesive layer 107, the first optical adhesive layer 105 is sandwiched between the first transparent layer 104 and the touch layer 106, and the second optical adhesive layer 107 is sandwiched between the second transparent layer 108 and the touch layer 106.

[0098] Specifically, the first optical adhesive layer 105 and the second optical adhesive layer 107 are both formed by curing at least one of OCA optical adhesive, LOCA water adhesive, SCA optical adhesive, COF optical adhesive, foam adhesive and double-sided tape; preferably, the first optical adhesive layer 105 and the second optical adhesive layer 107 are both formed by curing OCA optical adhesive.

[0099] Specifically, the first transparent layer 104 and the touch layer 106 are bonded together by OCA optical adhesive, and the second transparent layer 108 and the touch layer 106 are bonded together by OCA optical adhesive.

[0100] In some embodiments, the icon 103 is disposed on a side surface of the first transparent layer 104 .

[0101] Specifically, the icon 103 can be provided on one side surface of the first transparent layer 104 by means of silk screen printing or engraving.

[0102] In some embodiments, the icon 103 of the transparent touch panel 1 is disposed on a side surface of the touch layer 106 .

[0103] Specifically, the icon 103 may be provided on one side surface of the touch layer 106 by silk screen printing.

[0104] In some embodiments, the icon 103 may be disposed on the touch layer 106 of the transparent touch panel 1 by using a laser inscription process.

[0105] In some embodiments, the preparation method of the transparent touch panel 1 includes: coating OCA optical glue on both side surfaces of the touch layer 106 to obtain a touch layer having the OCA optical glue, then performing a cutting process on the touch layer to obtain a touch layer having a specific shape, then respectively bonding the first transparent layer 104 and the second transparent layer 108 to both side surfaces of the touch layer having the specific shape to obtain a pre-treated touch layer, and degassing the pre-treated touch layer to obtain the transparent touch panel 1.

[0106] Specifically, the cutting process includes: using a cutter or a die-cutting machine to cut the touch layer having the OCA optical adhesive to obtain a touch layer having a specific shape.

[0107] Specifically, the machine used in the degassing treatment is a degassing machine.

[0108] In some embodiments, the preparation method of the transparent touch panel 1 includes: coating OCA optical glue on one side surface of the touch layer 106 to obtain a first touch layer, cutting the first touch layer to obtain a touch layer with a specific shape, bonding the first transparent layer 104 and the touch layer with the specific shape with OCA optical glue to obtain a first pre-treated touch layer, coating OCA optical glue on one side surface of the second transparent layer 108 to obtain a second pre-treated touch layer, bonding the first pre-treated touch layer to one side surface of the second transparent layer coated with OCA optical glue, and performing degassing treatment to obtain the transparent touch panel 1.

[0109] Specifically, the cutting process includes: using a cutter or a die-cutting machine to cut the touch layer having the OCA optical adhesive to obtain a touch layer having a specific shape.

[0110] Specifically, the machine used in the degassing treatment is a degassing machine.

[0111] In some embodiments, a transparent touch panel 1, a control circuit board 2, and a housing 3 are provided with a cavity inside the housing 3, and the control circuit board 2 is disposed in the cavity. The transparent touch panel 1 includes a first portion 10 located outside the housing 3 and a second portion 11 located within the inner cavity of the housing 3. The area of ​​the first portion 10 accounts for a preset proportion of the total area of ​​the transparent touch panel 1, and the preset proportion is 60%-90%. The upper limit of the preset proportion may be, but is not limited to, 90%, 89%, 88%, etc., and the lower limit of the preset proportion may be, but is not limited to, 60%, 61%, 62%, etc.; it is understandable that the preset proportion can also be any point value within the above range, which is not enumerated here. Preferably, the preset proportion is 65-85%. More preferably, the preset proportion is 70%. By limiting the area of ​​the first portion 10 to a preset proportion of the total area of ​​the transparent touch panel 1, where the preset proportion is 60%-90%, the fixing strength of the touch panel on the housing 3 can be improved, and the area of ​​the first portion 10 can also meet the user's touch operation experience requirements, and also ensure the pressure bearing capacity of the touch panel, thereby extending the service life of the transparent touch switch.

[0112] In some embodiments, the transparent touch panel 1, the control circuit board 2, and the housing 3 are connected to each other, the plane on which the control circuit board 2 is located intersects the plane on which the transparent touch panel 1 is located, and the orthographic projection area of ​​the transparent touch panel 1 on the control circuit board 2 is less than a first preset ratio of the total area of ​​the control circuit board 2, wherein the first preset ratio is 1 / 15-1 / 7. The upper limit of the first preset ratio may be, but is not limited to, 1 / 7, 2 / 7, 3 / 7, etc., and the lower limit of the first preset ratio may be, but is not limited to, 1 / 15, 2 / 15, 3 / 15, etc.; it is understood that the first preset ratio can also be any value within the above range, which is not enumerated here. By limiting the orthographic projection area of ​​the transparent touch panel 1 on the control circuit board 2 to a first preset ratio smaller than the total area of ​​the control circuit board 2, and limiting the first preset ratio to 1 / 15-1 / 7, the usable space on the control circuit board 2 is expanded, allowing more components to be placed on the control circuit board 2, thereby improving the performance, function, and reliability of the circuit, greatly improving the overall performance of the range hood and improving the user experience. At the same time, it is also possible to place fewer lamp beads 41 on the control circuit board 2, reducing the cost of the transparent touch switch. In addition, such a configuration can reduce the contact area between the transparent touch panel and the control circuit board. Because the control circuit board is equipped with various components that emit heat during use, reducing the contact area can reduce the heat transferred from the control circuit board to the transparent touch panel. Preferably, the first preset ratio is 1 / 11-1 / 9. More preferably, the first preset ratio is 1 / 9. The orthographic projection area of ​​the transparent touch panel 1 on the control circuit board 2 refers to the projection area of ​​the transparent touch panel 1 on the control circuit board 2 in a direction perpendicular to the plane where the control circuit board 2 is located. The total area of ​​the control circuit board refers to the projection area of ​​the control circuit board 2 in the same projection direction as the orthographic projection direction of the transparent touch panel 1 on the control circuit board 2.

[0113] In some embodiments, an acute angle α exists between the control circuit board 2 and the transparent touch panel 1, satisfying 60°≤α<90°. The plane on which the control circuit board 2 resides is not necessarily perpendicular to the plane on which the transparent touch panel 1 resides; the two can be tilted and intersected at a certain angle. When the control circuit board 2 is placed horizontally and the transparent touch panel 1 is perpendicular to it at 90°, user operation may be inconvenient (similar to an ergonomically unsuitable angle). When the transparent panel is tilted at a certain angle, the user can operate it more conveniently. At the same time, the tilt angle cannot be too small to affect the user's field of view of the buttons. The control circuit board can also be tilted, but the angle with the horizontal plane should be as small as possible, thereby saving space overall.

[0114] In some embodiments, the housing 3 is provided with a mounting structure, which is formed with a mounting groove 301, and the transparent touch panel 1 can be embedded in the mounting groove 301. This arrangement makes it easier to disassemble and install the transparent touch panel 1.

[0115] In some embodiments, the housing 3 is provided with a glue dispensing groove 302 for accommodating glue. The glue dispensing groove 302 is arranged adjacent to the mounting groove 301 and is in communication with the mounting groove 301. The second portion 11 of the transparent touch panel 1 can be inserted into the glue dispensing groove 302. By filling the glue dispensing groove 302 with glue, the fixing strength between the transparent touch panel 1 and the housing 3 can be increased. At the same time, due to the gap between the mounting groove 301 and the transparent touch panel 1, substances such as water vapor or oil may enter the cavity of the housing 3 through the gap, causing damage to the transparent touch switch. The glue layer solidified in the glue dispensing groove 302 can further seal the gap between the mounting groove 301 and the transparent touch panel 1, thereby preventing substances such as water vapor or oil from entering the cavity, thereby extending the service life of the transparent touch switch.

[0116] In some embodiments, at least one side of the mounting structure protrudes from the surface of the housing 3. This arrangement can increase the contact area between the transparent touch panel 1 and the mounting structure, thereby making the installation of the transparent touch panel 1 more stable.

[0117] Specifically, the side of the mounting structure facing the first portion 10 protrudes from the surface of the housing 3 .

[0118] In some embodiments, the first portion 10 can pass through the mounting slot 301 to the second portion 11 and be fixed to the mounting structure. This installation method, from the interior of the housing 3 to the exterior of the housing 3, can make the transparent touch panel 1 more stable. The portion of the transparent touch panel 1 located within the mounting slot 301 also constitutes the second portion 11.

[0119] In some embodiments, the transparent touch panel 1 includes a limiting structure, and the housing 3 further includes a clamping member 33; after the first portion 10 can pass through the mounting groove 301, the limiting structure can be connected to the clamping member 33 to fix the second portion 11 to the mounting structure.

[0120] In some embodiments, the transparent touch panel 1 includes at least two limiting structures, the at least two limiting structures include a first limiting structure 110 and a second limiting structure 111, the shell 3 includes at least three clamping parts 33, the at least three clamping parts 33 include a first clamping part, a second clamping part and a third clamping part, the first limiting structure 110 of the transparent touch panel 1 is clamped with the first clamping part, the second limiting structure 111 is clamped with the second clamping part, and the middle part of one side of the transparent touch panel 1 is clamped with the third clamping part.

[0121] Specifically, the first clamping member, the second clamping member and the third clamping member are fixedly connected to the control circuit board 2 respectively.

[0122] In some embodiments, the housing 3 includes a front shell 31 and a rear shell 32 . The rear shell 32 is recessed to form a receiving groove, and the control circuit board 2 is placed in the receiving groove.

[0123] In some embodiments, the shell 3 also includes a connecting piece, and a mounting hole for accommodating the connecting piece is provided in the receiving groove of the rear shell 32. A first through hole corresponding to the position of the mounting hole is provided on the front shell 31. The connecting piece passes through the first through hole and extends into the mounting hole to connect the rear shell 32 and the front shell 31.

[0124] Specifically, a second through hole corresponding to the mounting hole is provided on the control circuit board 2 , and the connector passes through the first through hole and the second through hole in sequence and then extends into the mounting hole to connect the front shell 31 , the control circuit board 2 and the rear shell 32 .

[0125] In some embodiments, the transparent touch switch further includes a back plate 34 , which is fixedly connected to the rear housing 32 .

[0126] Specifically, the back plate 34 is made of metal.

[0127] In some embodiments, the transparent touch switch further includes a seal 35, which is sleeved on the rear housing 32. The seal 5 is provided on the transparent touch switch to protect the transparent touch switch from oil contamination, thereby improving the safety performance of the transparent touch switch and extending the service life of the transparent touch switch.

[0128] In some embodiments, a packaging member 36 is sleeved on the outside of the housing 3 . The packaging member 36 is provided with an opening, and the mounting groove 301 passes through the opening and protrudes from the surface of the packaging member 36 .

[0129] In some embodiments, the transparent touch panel 1 passes through the opening and out of the packaging member 36. The control circuit board 2 is located within the inner cavity of the housing 3, generating heat. Heat from the housing 3 and its inner cavity is transferred through objects to the transparent touch panel 1, causing it to heat up and affecting the user experience. Therefore, disposing the packaging member 36 outside the housing 3 can expand the heat dissipation of the housing 3, allowing some of the heat to be transferred to the packaging member 36, thereby reducing the heat transferred to the transparent touch panel 1. Furthermore, the mounting slot 301 passes through the opening of the packaging member 36, allowing the opening of the packaging member 36 to surround the mounting slot 301 as another component, thereby enhancing the strength of the mounting slot 301.

[0130] In some embodiments, a chamfered structure is provided on one end of the side wall of the mounting groove 301 facing the control circuit board 2 .

[0131] In some embodiments, at least two chamfered structures are provided on the side wall of the mounting groove 301 at one end facing the control circuit board 2 , and the at least two chamfered structures include a first chamfered structure 303 and a second chamfered structure 304 .

[0132] Specifically, the end of the side wall of the mounting groove 301 facing the control circuit board 2 is chamfered to obtain the mounting groove 301 having the first chamfer structure 303 and the second chamfer structure 304 .

[0133] Specifically, the chamfering process may be a frosted chamfering process or a polished chamfering process.

[0134] In some embodiments, the transparent touch panel 1 is T-shaped and includes at least a transverse portion 109 and a vertical portion. Along the length of the transparent touch panel 1, the length L1 of the transverse portion 109 and the length L2 of the vertical portion satisfy the following relationship: 1 / 90 ≤ L1 / L2 ≤ 1 / 36. Because the width of the transverse portion 109 is relatively small, its strength is relatively weak. If it is too long, it will easily break. This arrangement ensures that the transverse portion 109 does not occupy too much space when the transparent touch panel 1 is installed with the housing 3 and that the transverse portion 109 is relatively strong. It also ensures that the transparent touch panel 1 is not easily detached after installation, thereby ensuring stability.

[0135] In some embodiments, the vertical portion may be at least one of the remaining sides of the transparent touch panel 1 except the horizontal portion 109 .

[0136] In some embodiments, at least one edge of the first portion 10 is provided with an arc portion. The arc portion can match the housing 3 for easy installation, and the smooth angle transition increases the strength of the transparent touch panel 1 to prevent the panel from being easily broken by bumps.

[0137] In some embodiments, a first arc-shaped portion 101 and a second arc-shaped portion 102 are respectively provided on two edges of the first portion 10 .

[0138] Specifically, the edge of the transparent touch panel 1 away from the light-emitting element 4 is chamfered to obtain the transparent touch panel 1 having the first curved portion 101 and the second curved portion 102 .

[0139] Specifically, the R corner radius of the first curved portion 101 and the first curved portion 101 satisfies: R≥2mm. This not only satisfies the aesthetics, but also ensures that it is not easily bumped by the user. In addition, the R corner design increases the strength of the transparent touch panel 1 to prevent the panel itself from being easily broken by bumps.

[0140] Specifically, the chamfering process may be a frosted chamfering process or a polished chamfering process, which can ensure uniformity of the light source irradiated from the light emitting element 4 to the transparent touch panel 1 .

[0141] In some embodiments, the height of the mounting groove 301 is h1, the height of the first part 10 is h2, and the height of the transparent touch panel 1 is H, satisfying h1 / h2<h2 / H. The height refers to the height in the vertical direction perpendicular to the horizontal plane. The height of the mounting groove 301 should not be too long, otherwise it will reduce the height of the first part 10, which will affect the usable area of ​​the button icon on the one hand, and on the other hand, the area of ​​direct contact between the mounting groove 301 and the transparent touch panel 1 will be too large, which will conduct more heat and affect the user experience; and the height of the first part 10 should not be too small as a percentage of the total height of the transparent touch panel 1, otherwise it will also affect the usable area of ​​the button icon, and the small proportion of the first part 10 height means that the second part 11 in the cavity accounts for a large proportion, and the second part 11 is exposed to more heat, and will also conduct more heat to the first part 10, thereby affecting the user experience.

[0142] This embodiment further provides a range hood, comprising: any transparent touch switch according to the above embodiments.

[0143] Specifically, the range hood includes a fan frame 100 , a fume hood 200 and any one of the transparent touch switches in the above embodiments. The transparent touch switch is mounted on a side of the fan frame 100 facing the fume hood 200 .

[0144] Specifically, the control circuit board 2 of the transparent touch switch is electrically connected to the range hood. When a user presses a key, the control circuit board 2 illuminates the corresponding icon 103 on the transparent touch panel 1 based on the received electrical signal. Simultaneously, the control circuit board 2 issues a corresponding instruction to the range hood, which then performs the corresponding action. The illumination of the corresponding icon 103 indicates to the user that the range hood is in the operating state corresponding to the illuminated icon 103.

[0145] Example 1

[0146] This embodiment provides a transparent touch switch for a range hood. Figure 1-9 ,include:

[0147] A transparent touch panel 1, a control circuit board 2 and a light-emitting element 4. The transparent touch panel 1 is provided with an icon 103. The light-emitting element 4 is arranged on the control circuit board 2 and can emit light in a direction perpendicular to the plane where the control circuit board 2 is located; the orthographic projection of the upper edge of the transparent touch panel 1 on the control circuit board 2 coincides with the light-emitting element 4.

[0148] An icon 103 is provided on the transparent touch panel 1 , and the orthographic projection of the light emitting element 4 on the transparent touch panel 1 overlaps with the orthographic projection of the icon 103 of the transparent touch panel 1 on the control circuit board 2 . The light emitted by the light emitting element 4 can penetrate into the transparent touch panel 1 and illuminate the icon 103 .

[0149] Specifically, a marking area and an unmarked area are provided on the transparent touch panel 1 , and an icon 103 is provided in the marking area.

[0150] The switch further comprises a shading member 5 , in which the light emitting member 4 is embedded. The shading member 5 can reduce the emission angle of the light emitting member 4 .

[0151] Specifically, the gap d3 between the transparent touch panel 1 and the control circuit board 2 is in the range of 2<d3≤10 mm.

[0152] The shading member 5 is wrapped around the light emitting member 4 , and the height of the shading member 5 is at least 1.2 times the height of the light emitting member 4 .

[0153] The light-emitting component 4 includes a base and a lamp bead 41, and the shading component 5 includes an avoidance opening 52 and a shading opening 51. The avoidance opening 52 is connected to the shading opening 51, and the base can pass through the avoidance opening 52 until the lamp bead 41 is located in the shading opening 51, so that the light-emitting component 4 is embedded in the shading component 5.

[0154] The width of the avoidance opening 52 is greater than the width of the light shielding opening 51 .

[0155] The light shielding member 5 is provided with a plurality of avoidance openings 52 , and the plurality of avoidance openings 52 correspond to the plurality of light shielding openings 51 one by one.

[0156] The light shielding member 5 is provided with a plurality of light shielding openings 51 , which correspond to the logo area of ​​the transparent touch panel 1 . Specifically, the light shielding openings 51 are provided above / below the logo area of ​​the transparent touch panel 1 .

[0157] Specifically, the transparent touch switch includes a plurality of light-emitting elements 4 , and the plurality of light-emitting elements 4 corresponds one-to-one to the plurality of light-shielding openings 51 .

[0158] The light shielding member 5 includes at least one light shielding portion, which corresponds to the non-logo area of ​​the transparent touch panel 1 . Specifically, the light shielding portion is disposed above / below the non-logo area of ​​the transparent touch panel 1 .

[0159] Specifically, the light shielding member 5 includes a plurality of light shielding portions, each of which is disposed around each light shielding opening 51 to form a plurality of light shielding areas.

[0160] The shading member 5 includes a first shading layer and a second shading layer. The first shading layer is provided with four shading openings 51 , four shading portions and four avoidance openings 52 . The second shading layer is provided with three shading openings 51 , three shading portions and three avoidance openings 52 .

[0161] The material of the shading element 5 is foam or plastic.

[0162] The material of the shading element 5 is foam or plastic.

[0163] The shading element 5 is fixedly connected to the control circuit board 2 .

[0164] The lamp beads 41 can emit light L along the edge of the light shielding opening 51 to the transparent touch panel 1;

[0165] The transparent touch panel 1 includes a plurality of icons 103. Two adjacent icons 103 are arranged on the transparent touch panel 1 at intervals. The two adjacent icons 103 include a first icon 103 and a second icon 103. The distance between the center line of the first icon 103 and the light L is b; the distance between the center of the first icon 103 and the edge of the second icon 103 is c.

[0166] b is less than c.

[0167] The diameter of the icon 103 is d, and b is greater than a preset ratio of d, which is 1 / 2-2 / 3. Preferably, the preset ratio is 1 / 2.

[0168] The angle between the light L and the center line of the lamp bead 41 is θ, the distance between the center of the lamp bead 41 and the transparent touch panel 1 is h1, and the distance between the lamp bead 41 and the center of the icon 103 is h2;

[0169] The width of the light shielding opening 51 is 2a, and the width of the light shielding opening 51 satisfies at least one of the following formulas:

[0170]

[0171] The light-emitting element 4 is a spherical lamp bead.

[0172] The transparent touch panel 1 further includes a transparent layer, an optical adhesive layer, and a touch layer 106 . The optical adhesive layer is sandwiched between the transparent layer and the touch layer 106 .

[0173] The touch layer 106 can sense the action of a user's finger pressing a key and generate an electrical signal to control the electrical connection between the circuit board 2, the light-emitting element 4, and the transparent touch panel 1.

[0174] The touch layer 106 includes a conductive film and a substrate.

[0175] Specifically, the conductive film includes at least one of an indium tin oxide film, a nanosilver film and a PeDot film, and the substrate is a PET film.

[0176] The touch layer 106 is ITO glass.

[0177] The thickness of the touch layer 106 is 0.1-0.2 mm.

[0178] The orthographic projection area of ​​the optical adhesive layer on the control circuit board 2 is smaller than a second preset ratio of the total area of ​​the control circuit board 2, and the second preset ratio is 1 / 200-1 / 100. Preferably, the second preset ratio is 1 / 200-1 / 150. More preferably, the second preset ratio is 1 / 200.

[0179] The transparent touch panel 1 includes a silver paste line, one end of which is connected to the touch layer 106 , and the other end of which extends from the bottom of the touch layer 106 to the control circuit board 2 and is connected to the control circuit board 2 .

[0180] The thickness ratio of the transparent layer to the optical adhesive layer is 1:(8-12). Preferably, the thickness ratio of the transparent layer to the optical adhesive layer is 1:(9-11). Further preferably, the thickness ratio of the transparent layer to the optical adhesive layer is 1:10.

[0181] The transparent touch panel 1 includes two transparent layers, including a first transparent layer 104 and a second transparent layer 108 . Both the first transparent layer 104 and the second transparent layer 108 are glass transparent layers.

[0182] The first transparent layer 104 and the second transparent layer 108 are both made of at least one of PC, acrylic, and glass. Preferably, the first transparent layer 104 and the second transparent layer 108 are both made of glass.

[0183] Specifically, the material of the first transparent layer 104 and the second transparent layer 108 includes at least one of blue glass, white glass and ultra-clear glass.

[0184] The thickness of the optical adhesive layer is 0.125-0.3mm.

[0185] An anti-fingerprint coating is provided on a surface of the first transparent layer 104 away from the touch layer 106 and / or a surface of the second transparent layer 108 away from the touch layer 106 .

[0186] The transparent touch panel 1 includes two optical adhesive layers, including a first optical adhesive layer 105 and a second optical adhesive layer 107 . The first optical adhesive layer 105 is sandwiched between the first transparent layer 104 and the touch layer 106 , and the second optical adhesive layer 107 is sandwiched between the second transparent layer 108 and the touch layer 106 .

[0187] Specifically, the first optical adhesive layer 105 and the second optical adhesive layer 107 are both formed by curing at least one of OCA optical adhesive, LOCA water adhesive, SCA optical adhesive, COF optical adhesive, foam adhesive and double-sided tape; preferably, the first optical adhesive layer 105 and the second optical adhesive layer 107 are both formed by curing OCA optical adhesive.

[0188] Specifically, the first transparent layer 104 and the touch layer 106 are bonded together by OCA optical adhesive, and the second transparent layer 108 and the touch layer 106 are bonded together by OCA optical adhesive.

[0189] The icon 103 is provided on one side surface of the first transparent layer 104 .

[0190] Specifically, the icon 103 can be provided on one side surface of the first transparent layer 104 by means of silk screen printing or engraving.

[0191] The preparation method of the transparent touch panel 1 includes: coating OCA optical adhesive on both sides of the touch layer 106 to obtain a touch layer having the OCA optical adhesive, then cutting the touch layer to obtain a touch layer having a specific shape, then bonding the first transparent layer 104 and the second transparent layer 108 to both sides of the touch layer having the specific shape to obtain a pre-treated touch layer, and degassing the pre-treated touch layer to obtain the transparent touch panel 1.

[0192] Specifically, the cutting process includes: using a cutter or a die-cutting machine to cut the touch layer having the OCA optical adhesive to obtain a touch layer having a specific shape.

[0193] Specifically, the machine used in the degassing treatment is a degassing machine.

[0194] A transparent touch panel 1, a control circuit board 2, and a housing 3 are provided. The housing 3 has a cavity within which the control circuit board 2 is disposed. The transparent touch panel 1 includes a first portion 10 located outside the housing 3 and a second portion 11 located within the interior of the housing 3. The area of ​​the first portion 10 accounts for a predetermined proportion of the total area of ​​the transparent touch panel 1, with the predetermined proportion being 60%-90%. Preferably, the predetermined proportion is 65-85%. More preferably, the predetermined proportion is 70%.

[0195] A transparent touch panel 1, a control circuit board 2, and a housing 3 are provided. The transparent touch panel 1 is connected to the housing 3. The plane on which the control circuit board 2 is located intersects the plane on which the transparent touch panel 1 is located. The orthographic projection area of ​​the transparent touch panel 1 on the control circuit board 2 is smaller than a first predetermined ratio of the total area of ​​the control circuit board 2. The first predetermined ratio is preferably 1 / 15-1 / 7. Preferably, the first predetermined ratio is 1 / 11-1 / 9. More preferably, the first predetermined ratio is 1 / 9.

[0196] The housing 3 is provided with a mounting structure, which is formed with a mounting groove 301 , and the transparent touch panel 1 can be embedded in the mounting groove 301 .

[0197] The housing 3 is provided with a glue dispensing groove 302 for accommodating glue. The glue dispensing groove 302 is arranged adjacent to the mounting groove 301 and is communicated with the mounting groove 301 . The second portion 11 of the transparent touch panel 1 can be inserted into the glue dispensing groove 302 .

[0198] At least one side of the mounting structure protrudes from the surface of the housing 3 .

[0199] Specifically, the side of the mounting structure facing the first portion 10 protrudes from the surface of the housing 3 .

[0200] The first portion 10 can pass through the mounting groove 301 to the second portion 11 and be fixed in the mounting structure.

[0201] The transparent touch panel 1 includes a limiting structure, and the housing 3 further includes a clamping member 33 . After the first portion 10 passes through the mounting slot 301 , the limiting structure can be connected to the clamping member 33 to fix the second portion 11 to the mounting structure.

[0202] The transparent touch panel 1 includes at least two limiting structures, which include a first limiting structure 110 and a second limiting structure 111. The shell 3 includes at least three clamping parts 33, which include a first clamping part, a second clamping part and a third clamping part. The first limiting structure 110 of the transparent touch panel 1 is clamped with the first clamping part, the second limiting structure 111 is clamped with the second clamping part, and the middle part of one side of the transparent touch panel 1 is clamped with the third clamping part.

[0203] Specifically, the first clamping member, the second clamping member and the third clamping member are fixedly connected to the control circuit board 2 respectively.

[0204] The housing 3 includes a front shell 31 and a rear shell 32 . The rear shell 32 is recessed to form a receiving groove, and the control circuit board 2 is placed in the receiving groove.

[0205] The shell 3 also includes a connecting piece. A mounting hole for accommodating the connecting piece is provided in the receiving groove of the rear shell 32. A first through hole corresponding to the position of the mounting hole is provided on the front shell 31. The connecting piece passes through the first through hole and extends into the mounting hole to connect the rear shell 32 and the front shell 31.

[0206] Specifically, a second through hole corresponding to the mounting hole is provided on the control circuit board 2 , and the connector passes through the first through hole and the second through hole in sequence and then extends into the mounting hole to connect the front shell 31 , the control circuit board 2 and the rear shell 32 .

[0207] The transparent touch switch further includes a back plate 34 , which is fixedly connected to the rear housing 32 .

[0208] Specifically, the back plate 34 is made of metal.

[0209] The transparent touch switch further includes a sealing member 35 , which is sleeved on the rear housing 32 .

[0210] The outer portion of the housing 3 is provided with a packaging member 36 . The packaging member 36 is provided with an opening. The mounting groove 301 passes through the opening and protrudes from the surface of the packaging member 36 .

[0211] The transparent touch panel 1 passes through the opening and out of the packaging member 36 .

[0212] A chamfered structure is provided on one end of the side wall of the mounting groove 301 facing the control circuit board 2 .

[0213] At least two chamfered structures are provided on the side wall of the mounting groove 301 at one end facing the control circuit board 2 . The at least two chamfered structures include a first chamfered structure 303 and a second chamfered structure 304 .

[0214] Specifically, the end of the side wall of the mounting groove 301 facing the control circuit board 2 is chamfered to obtain the mounting groove 301 having the first chamfer structure 303 and the second chamfer structure 304 .

[0215] Specifically, the chamfering process may be a frosted chamfering process or a polished chamfering process.

[0216] The transparent touch panel 1 is T-shaped and includes at least a transverse portion 109 and a vertical portion. Along the length direction of the transparent touch panel 1 , the length L1 of the transverse portion 109 and the length L2 of the vertical portion satisfy: 1 / 90≤L1 / L2≤1 / 36.

[0217] The vertical portion may be at least one of the remaining sides of the transparent touch panel 1 except the horizontal portion 109 .

[0218] A first arc-shaped portion 101 and a second arc-shaped portion 102 are respectively formed on two edges of the first portion 10 .

[0219] Specifically, the edge of the transparent touch panel 1 away from the light-emitting element 4 is chamfered to obtain the transparent touch panel 1 having the first curved portion 101 and the second curved portion 102 .

[0220] Specifically, the first arc-shaped portion 101 and the R corner radius of the first arc-shaped portion 101 meet: R ≥ 2 mm.

[0221] Specifically, the chamfering process may be a frosted chamfering process or a polished chamfering process.

[0222] The height of the mounting groove 301 is h1, the height of the first portion 10 is h2, and the height of the transparent touch panel 1 is H, satisfying h1 / h2<h2 / H.

[0223] Although the present invention has been described through preferred embodiments, the present invention is not limited to the embodiments described herein, and includes various changes and modifications that may be made without departing from the scope of the present invention.

[0224] In this document, directional terms such as "front," "back," "upper," and "lower" are defined based on the positions of components in the accompanying drawings and relative to each other, and are intended solely for clarity and convenience in describing the technical solution. It should be understood that the use of directional terms should not limit the scope of protection claimed in this utility model.

[0225] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0226] The above disclosure is only a preferred embodiment of the present invention and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A transparent touch switch for a range hood, characterized in that: include: A transparent touch panel (1), a control circuit board (2), and a light-emitting element (4), wherein the light-emitting element (4) is arranged on the control circuit board (2) and is capable of emitting light in a direction perpendicular to the plane where the control circuit board (2) is located; The orthographic projection of the upper edge of the transparent touch panel (1) on the control circuit board (2) coincides with the light-emitting element (4).

2. The transparent touch switch according to claim 1, wherein the transparent touch panel (1) is provided with an icon (103), characterized in that: The orthographic projection of the light-emitting element (4) on the transparent touch panel (1) overlaps with the orthographic projection of the icon (103) of the transparent touch panel (1) on the control circuit board (2), and the light emitted by the light-emitting element (4) can enter the transparent touch panel (1) and illuminate the icon (103).

3. The transparent touch switch according to claim 1, characterized in that: The switch further comprises a shading member (5), the luminous member (4) is embedded in the shading member (5), and the shading member (5) can reduce the emission angle of the luminous member (4).

4. The transparent touch switch according to claim 3, characterized in that: The shading member (5) is wrapped around the luminous member (4), and the height of the shading member (5) is at least 1.2 times the height of the luminous member (4).

5. The transparent touch switch according to claim 3, characterized in that: The light-emitting component (4) comprises a base and a lamp bead (41); the light-shielding component (5) comprises a relief opening (52) and a light-shielding opening (51); the relief opening (52) is communicated with the light-shielding opening (51); the base can pass through the relief opening (52) until the lamp bead (41) is located in the light-shielding opening (51), so that the light-emitting component (4) is embedded in the light-shielding component (5).

6. The transparent touch switch according to claim 5, characterized in that: The width of the avoidance opening (52) is greater than the width of the light-shielding opening (51).

7. The transparent touch switch according to claim 5, characterized in that: The lamp bead (41) can emit light (L) along the edge of the light shielding opening (51) to the transparent touch panel (1); The transparent touch panel (1) includes a plurality of icons (103), two adjacent icons are arranged on the transparent touch panel (1) at intervals, the two adjacent icons include a first icon and a second icon, the distance between the center line of the first icon and the light (L) is b; the distance between the center of the first icon and the edge of the second icon is c; Said b is smaller than c.

8. The transparent touch switch according to claim 7, characterized in that: The diameter of the icon (103) is d, and b is greater than a preset ratio of d, and the preset ratio is 1 / 2-2 / 3.

9. The transparent touch switch according to claim 8, characterized in that: The angle between the light (L) and the center line of the lamp bead (41) is θ, the distance between the center of the lamp bead (41) and the transparent touch panel (1) is h1, and the distance between the lamp bead (41) and the center of the icon (103) is h2; The width of the light shielding opening (51) is 2a, and the width of the light shielding opening (51) satisfies at least one of the following formulas:

10. The transparent touch switch according to any one of claims 1 to 8, characterized in that: The light-emitting component (4) is a spherical lamp bead.

11. The transparent touch switch according to any one of claims 1 to 8, characterized in that: The control circuit board (2) is provided with a mounting position, the light-emitting component (4) is embedded in the mounting position, and the mounting position can reduce the emission angle of the light-emitting component (4).

12. A range hood, characterized in that: It comprises a fan frame (100), a smoke collecting hood (200), and a transparent touch switch according to any one of claims 1 to 11, wherein the transparent touch switch is mounted on a side of the fan frame (100) facing the smoke collecting hood (200).

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