Touch transparent switch and range hood

Abstract

The utility model relates to the technical field of touch control switches, in particular to a touch control type transparent switch and a range hood, the touch control type transparent switch comprises a transparent display panel, a control circuit board, a front shell, a light-emitting part and a shading part, the light-emitting part is arranged on the control circuit board, and the shading part is arranged around the light-emitting part. The light shielding part is provided with a first light channel corresponding to the light emitting part, the front shell is provided with a second light channel, the second light channel is aligned to the edge of the side, close to the front shell, of the transparent display panel, the first light channel is communicated with the second light channel, and at least one part of the second light channel extends in the direction away from the first light channel and protrudes out of the front shell; at least one part of the second light channel extends in the direction deviating from the first light channel and protrudes out of the front shell, so that the distance from the second light channel to the icon is shorter, light scattering waste is avoided, the luminous flux is reduced, and the utilization rate of light energy is increased.

Description

Technical Field

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

[0002] A range hood, also known as a cooker hood, is a kitchen appliance that purifies the kitchen environment. Typically installed above the kitchen stove, it quickly extracts waste from the stove and harmful cooking fumes, exhausting them outdoors. It also condenses and collects the fumes, reducing pollution, purifying the air, and providing safety features like anti-toxicity and explosion protection.

[0003] The touch-sensitive transparent switch on the existing range hood has an optical channel and a transparent display panel, and the transparent display panel has icons. Since there is a distance between the optical channel and the icons, the light emitted by the light source will illuminate the non-icon area on the transparent display panel before irradiating the icons. The non-icon area of ​​the transparent display panel has a strong scattering and refraction effect on the light, which will reduce the utilization rate of light energy.

[0004] Therefore, it is necessary to provide an improved solution 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 touch-sensitive transparent switch.

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

[0007] A touch-sensitive transparent switch, used in a range hood, comprises: a transparent display panel, a control circuit board, a front housing, a light-emitting element, and a light-shielding element; the light-emitting element is arranged on the control circuit board, and the light-shielding element is arranged around the light-emitting element;

[0008] The light shielding member is provided with a first light channel corresponding to the light emitting member, and the front housing is provided with a second light channel, and the second light channel is aligned with an edge of the transparent display panel close to the front housing;

[0009] The first light channel is connected to the second light channel, and at least a portion of the second light channel extends in a direction away from the first light channel and protrudes from the front shell.

[0010] In a possible implementation, the switch further includes an enclosure, the enclosure is provided with an opening, and a portion of the second light channel protruding from the front housing passes through the opening and protrudes from the enclosure.

[0011] In a possible implementation, a dimension of the second light channel in a length direction of the transparent display panel is larger than that of the first light channel.

[0012] In a possible implementation manner, the width of the second optical channel in the thickness direction of the transparent display panel is greater than that of the first optical channel.

[0013] In a possible implementation manner, there is a first spacing distance between the first optical channel and the second optical channel, and the dimension of the second optical channel in the length direction of the transparent display panel and the first spacing distance satisfy the following formula: L1≥x×L2, where x is 10 to 18, L1 is the dimension of the second optical channel in the length direction of the transparent display panel, and L2 is the first spacing distance.

[0014] In a possible implementation manner, the dimension of the second optical channel in the length direction of the transparent display panel and the first spacing distance satisfy the following formula: L1>x1×L2, where x1 is 13 to 16.

[0015] In a possible implementation manner, there is an icon on the transparent display panel, and there is a second spacing distance between the side of the second optical channel close to the icon and the icon. The protruding height of the second optical channel on the front shell and the second spacing distance satisfy the following formula: L3≤y×L4, where y is 1.5 to 5, L3 is the second spacing distance, and L4 is the protruding height of the second optical channel on the front shell.

[0016] In a possible implementation manner, the protruding height of the second optical channel on the front shell and the second spacing distance satisfy the following formula: L3<y1×L4, where y1 is 2.5 to 3.5.

[0017] In a possible implementation manner, the light-emitting component is embedded in the light-shielding component, and the light-shielding component can limit the emission angle of the light-emitting component.

[0018] In a possible implementation manner, the height of the light-shielding component and the height of the light-emitting component satisfy the following formula: h1≥z×h2, where z is 1.2, h1 is the height of the light-shielding component, and h2 is the height of the light-emitting component.

[0019] The present utility model further provides an oil fume machine, including a fan frame, a smoke collecting hood, and a touch-type transparent switch as described in any one of the above implementation manners. The touch-type transparent switch is installed on the fan frame, and at least part of the transparent display panel is independent of the outside of the fan frame.

[0020] The present utility model has the following beneficial effects:

[0021] The touch-sensitive transparent switch of the present invention includes a transparent display panel, a control circuit board, a front shell, a light-emitting element and a light-shielding element. The light-emitting element is arranged on the control circuit board, and the light-shielding element is arranged around the light-emitting element. A first light channel corresponding to the light-emitting element is provided on the light-shielding element, and a second light channel is provided on the front shell. The second light channel is aligned with the edge of the transparent display panel close to the front shell. The first light channel is connected to the second light channel. At least a portion of the second light channel extends in a direction away from the first light channel and protrudes from the front shell. By extending at least a portion of the second light channel in a direction away from the first light channel and protruding from the front shell, the distance from the second light channel to the icon is shortened, thereby avoiding light scattering waste, reducing light flux, and improving the utilization rate of light energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 : A schematic structural diagram of a touch-sensitive transparent switch provided in an embodiment of the present disclosure.

[0024] Figure 2 : A cross-sectional view of a touch-sensitive transparent switch provided in an embodiment of the present disclosure.

[0025] Figure 3 : A schematic structural diagram of a touch-sensitive transparent switch provided in an embodiment of the present disclosure.

[0026] Figure 4 : Schematic diagram of the structure of the front shell provided in an embodiment of the present disclosure.

[0027] Figure 5 : A cross-sectional view of a touch-sensitive transparent switch provided in an embodiment of the present disclosure.

[0028] Figure 6 : A front view of a transparent display panel provided by an embodiment of the present disclosure;

[0029] Figure 7 : A side view of a transparent display panel provided by an embodiment of the present disclosure;

[0030] Figure 8 : A schematic structural diagram of the range hood provided in an embodiment of the present disclosure.

[0031] In the figure: 1-transparent display panel, 10-first part, 11-second part, 2-control circuit board, 3-housing, 4-light-emitting part, 5-light-shielding part, 51-first light channel, 31-front shell, 32-rear shell, 33-clamping part, 34-back plate, 35-sealing part, 36-packaging part, 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-glue dispensing groove, 302-first chamfered structure, 303-second chamfered structure, 311-second light channel, 100-fan rack, 200-smoke hood. DETAILED DESCRIPTION

[0032] 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.

[0033] 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.

[0034] The following embodiments are described with reference to the accompanying drawings, which do not limit the disclosure of the claims. The numerical 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 numerical values ​​can be calculated. Furthermore, the relevant descriptions in this application all refer to the range hood in normal use, that is, when the range hood is mounted on a wall.

[0035] The following is combined with Figure 1 The touch-sensitive transparent switch provided by the embodiment of the present invention includes:

[0036] Transparent display panel 1, control circuit board 2, front housing 31, light emitting element 4 and light shielding element 5; the light emitting element 4 is arranged on the control circuit board 2, and the light shielding element 5 is arranged around the light emitting element 4;

[0037] The light shielding member 5 is provided with a first light channel 51 corresponding to the light emitting member 4, and the front housing 31 is provided with a second light channel 311. The second light channel 311 is aligned with the edge of the transparent display panel 1 close to the front housing 31.

[0038] The first light channel 51 is connected to the second light channel 311. At least a portion of the second light channel 311 extends away from the first light channel 51 and protrudes from the front housing 31. By extending at least a portion of the second light channel 311 away from the first light channel 51 and protruding from the front housing 31, the present application shortens the distance between the second light channel 311 and the icon, avoiding light scattering and waste, reducing light flux, and improving light energy utilization. The alignment arrangement indicates that the second light channel 311 corresponds to the edge of the transparent display panel 1 on the side closest to the front housing 31.

[0039] Specifically, the front shell 31 is provided with an opening, which is located on the second light channel 311 , and at least a portion of the second light channel 311 extends away from the first light channel 51 and protrudes from the plane where the opening of the front shell 31 is located.

[0040] In some embodiments, a touch-sensitive switch includes a housing 3 having a cavity defined therein, a control circuit board 2 disposed within the cavity, and a transparent display panel 1 including 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 display panel 1, the predetermined proportion being 60%-90%. The upper limit of the predetermined proportion may be, but is not limited to, 90%, 89%, 88%, and the lower limit may be, but is not limited to, 60%, 61%, 62%, and the like. It is understood that the predetermined proportion may also be any value within the aforementioned range, which is not enumerated here. Preferably, the predetermined proportion is 65-85%. More preferably, the predetermined proportion is 70%. By limiting the predetermined proportion of the area of ​​the first portion 10 to the total area of ​​the transparent display panel 1 to a predetermined proportion of 60-90%, the fixing strength of the display panel to the housing 3 can be improved, while the area of ​​the first portion 10 can meet the user's touch operation experience requirements, ensure the pressure-bearing capacity of the display panel, and extend the service life of the touch-sensitive transparent switch. On the other hand, a control circuit board is generally provided inside the cavity to generate heat, and the second part 11 located inside the cavity will be exposed to more heat. In order to reduce the heat felt by the user on the transparent display panel 1, the proportion of the second part 11 can be reduced and the proportion of the first part 10 can be increased.

[0041] Specifically, the housing 3 includes a front shell 31 and a rear shell 32 .

[0042] In some embodiments, the transparent display 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 display panel 1 is located, and the orthographic projection area of ​​the transparent display panel 1 on the control circuit board 2 is less than a first predetermined ratio of the total area of ​​the control circuit board 2, wherein the first predetermined ratio is 1 / 15-1 / 7. The upper limit of the first predetermined ratio may be, but is not limited to, 1 / 7, 2 / 7, 3 / 7, etc., and the lower limit of the first predetermined ratio may be, but is not limited to, 1 / 15, 2 / 15, 3 / 15, etc.; it is understood that the first predetermined ratio may also be any value within the above range, which is not enumerated here. By limiting the orthographic projection area of ​​the transparent display 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 is expanded, allowing more components to be placed on the control circuit board, 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 on the control circuit board 2, reducing the cost of the touch-sensitive transparent switch. In addition, such a configuration can reduce the contact area between the transparent display panel 1 and the control circuit board 2. Because the various components installed on the control circuit board 2 will dissipate heat during use, reducing the contact area can reduce the heat transmitted from the control circuit board 2 to the transparent display panel 1. 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 display panel 1 on the control circuit board 2 refers to the projection area of ​​the transparent display 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 2 refers to the projection area of ​​the control circuit board 2 in the same projection direction as the orthographic projection direction of the transparent display panel 1 on the control circuit board 2.

[0043] In some embodiments, an acute angle α exists between the control circuit board 2 and the transparent display panel 1, satisfying 60°≤α<90°. The plane on which the control circuit board 2 is located is not necessarily perpendicular to the plane on which the transparent display panel 1 is located; the two can be tilted and intersected at a certain angle. When the control circuit board 2 is placed horizontally and the transparent display panel 1 is perpendicular to it at 90°, user operation may be inconvenient (similar to an angle that is not ergonomic). When the transparent panel is tilted at a certain angle, it is more convenient for the user to operate. 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 is as small as possible, so that the overall space is saved.

[0044] In some embodiments, the transparent display panel 1 is embedded in the second light channel 311. This configuration makes it easier to disassemble and install the transparent display panel 1.

[0045] In some embodiments, the front housing 31 is provided with a glue dispensing groove 301 for accommodating glue. The glue dispensing groove 301 is disposed adjacent to and communicates with the second optical channel 311. By filling the glue dispensing groove 301 with glue, the fixing strength between the transparent display panel 1 and the housing 3 can be increased. At the same time, due to the gap between the second optical channel 311 and the transparent display panel 1, substances such as water vapor or oil may enter the cavity of the housing 3 through the gap, causing damage to the touch-sensitive transparent switch. The glue layer solidified in the glue dispensing groove 301 can further seal the gap between the second optical channel 311 and the transparent display panel 1, thereby preventing substances such as water vapor or oil from entering the cavity, thereby extending the service life of the touch-sensitive transparent switch.

[0046] In some embodiments, the first portion 10 can pass through the second light channel 311 to the second portion 11, where it is fixed to the housing. This installation method, from the interior of the housing 3 to the exterior of the housing 3, can make the transparent display panel 1 more stable. The portion of the transparent display panel 1 located within the second light channel 311 also constitutes the second portion 11.

[0047] In some embodiments, the transparent display panel 1 includes a limiting structure, and the shell 3 also includes a clamping member 33; after the first part 10 can pass through the second light channel, the limiting structure can be connected to the clamping member 33 to fix the second part 11 in the shell 3.

[0048] In some embodiments, the transparent display 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 display 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 display panel 1 is clamped with the third clamping part.

[0049] Specifically, the first clamping member, the second clamping member and the third clamping member are fixedly connected to the control circuit board 2 respectively.

[0050] In some embodiments, the rear housing 32 is recessed to form a receiving groove, and the control circuit board 2 is placed in the receiving groove.

[0051] 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.

[0052] 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 .

[0053] In some embodiments, the touch-sensitive transparent switch further includes a back plate 34 , which is fixedly connected to the rear housing 32 .

[0054] Specifically, the back plate 34 is made of metal.

[0055] In some embodiments, the touch-sensitive transparent switch further includes a seal 35, which is sleeved on the rear housing 32. The seal 35 is provided on the touch-sensitive transparent switch to protect the touch-sensitive transparent switch from oil contamination, thereby improving the safety performance of the touch-sensitive transparent switch and extending the service life of the touch-sensitive transparent switch.

[0056] In some embodiments, the switch includes a packaging member 36 , which is provided with an opening. The portion of the second light channel 311 protruding from the front housing 31 passes through the opening and protrudes from the packaging member 36 .

[0057] In some embodiments, the transparent display panel 1 extends through an opening in the encapsulation member 36. The control circuit board 2 is located within the inner cavity of the housing 3, generating heat. This heat from the housing 3 and its inner cavity is transferred through objects to the transparent display panel 1, causing it to heat up and impacting the user experience. Therefore, disposing the encapsulation 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 encapsulation member 36, thereby reducing the amount of heat transferred to the transparent display panel 1. Furthermore, the second light channel 311 extends through the opening in the encapsulation member 36, allowing the opening in the encapsulation member 36 to serve as another component surrounding the second light channel 311, thereby enhancing the strength of the second light channel 311.

[0058] In some embodiments, a chamfered structure is provided on one end of the side wall of the second light channel 311 facing the control circuit board 2 .

[0059] In some embodiments, at least two chamfered structures are provided on the sidewall of the second light channel 311 at one end facing the control circuit board 2 , and the at least two chamfered structures include a first chamfered structure 302 and a second chamfered structure 303 .

[0060] Specifically, the end of the side wall of the second light channel 311 facing the control circuit board 2 is chamfered to obtain the second light channel 311 having the first chamfer structure 302 and the second chamfer structure 303 .

[0061] Specifically, the chamfering process may be a frosted chamfering process or a polished chamfering process.

[0062] In some embodiments, the transparent display panel 1 is T-shaped and includes at least a transverse portion 109 and a vertical portion. Along the length of the transparent display 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 display panel 1 is installed with the housing 3 and that the transverse portion 109 is relatively strong. It also ensures that the transparent display panel 1 is not likely to fall off after installation, thereby ensuring stability.

[0063] In some embodiments, the vertical portion may be at least one of the remaining sides of the transparent display panel 1 except the horizontal portion 109 .

[0064] In some embodiments, at least one edge of the first portion 10 is provided with an arc portion. The arc portion can fit the housing 3 for easy installation, and the smooth angle transition increases the strength of the transparent display panel 1 to prevent the panel from being easily broken by collision.

[0065] 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 .

[0066] Specifically, the edge of the transparent display panel 1 away from the light emitting element 4 is chamfered to obtain the transparent display panel 1 having the first curved portion 101 and the second curved portion 102 .

[0067] 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 display panel 1 to prevent the panel itself from being easily broken by bumps.

[0068] 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 display panel 1 .

[0069] In some embodiments, the second light channel 311 is larger than the first light channel 51 in the length direction of the transparent display panel 1. With this arrangement, the light emitted from the second light channel 311 has a light angle, and when it is irradiated on the transparent display panel 1, it has a certain divergence angle, thereby illuminating more areas in the length direction of the transparent display panel 1.

[0070] In some embodiments, the second light channel 311 is wider than the first light channel 51 in the thickness direction of the transparent display panel 1. This configuration further allows the light emitted from the second light channel 311 to have a light angle, thereby illuminating more areas of the transparent display panel 1.

[0071] In some embodiments, a first spacing distance is provided between the first light channel 51 and the second light channel 311, and the dimension of the second light channel 311 in the length direction of the transparent display panel 1 and the first spacing distance satisfy the following formula: L1 ≥ x × L2, where x is 10 to 18, L1 is the dimension of the second light channel 311 in the length direction of the transparent display panel 1, and L2 is the first spacing distance. Preferably, x is 13 to 16. By setting the above formula, the second light channel 311 can effectively gather the light emitted from the first light channel 51, thereby improving the utilization rate of light energy. In the length direction of the transparent display panel 1, the light passing through the first light channel 51 enters the second light channel 311. The larger the dimension L1 of the second light channel 311, the more conducive it is for the light to have a larger illumination area in the length direction of the transparent display panel 1, making the illumination area larger and reducing the dark area. However, if the light needs to be more concentrated in the thickness direction of the transparent display panel 1, reducing the distance from the first light channel 51 to the second light channel 311 can reduce the loss of light in this section.

[0072] In some embodiments, the dimension of the second light channel 311 in the length direction of the transparent display panel 1 and the first spacing distance satisfy the following formula: L1>x1×L2, where x1 is 13 to 16. By setting the above formula, the second light channel 311 can further effectively collect light emitted from the first light channel 51.

[0073] In some embodiments, the transparent display panel 1 has an icon 103, and a second spacing distance is formed between the side of the second light channel 311 close to the icon 103 and the icon 103. The protruding height of the second light channel 311 on the front shell 31 and the second spacing distance satisfy the following formula: L3≤y×L4, wherein y is 1.5-5, L3 is the second spacing distance, and L4 is the protruding height of the second light channel 311 on the front shell 31. Preferably, y is 2.5-3.5. Further preferably, y is 2.98. By defining the above formula, it is possible to prevent the light emitted by the light-emitting element from scattering on the non-icon area of ​​the transparent display panel, thereby improving the light energy utilization rate.

[0074] In some embodiments, the transparent display panel 1 is provided with a touch area having an icon 103, which is covered with a conductive coating. The light-emitting element 4 is disposed on the control circuit board 2 and is located on the side of the transparent display panel 1. Light emitted by the light-emitting element 4 enters the side of the transparent display panel 1 and illuminates the icon. This arrangement ensures that the majority of the conductive coating of the transparent display panel 1 is located outside the housing 3. By using side lighting, only the side of the panel is illuminated by the light-emitting element 4, rather than the entire touch surface being directly exposed to the strong light from the lamp beads (conventional display panels generally have the icon area backlit, with the entire icon area being exposed to the strong light from the lamp beads). This can significantly extend the service life of the conductive coating.

[0075] In some embodiments, the protruding height of the second light channel 311 on the front housing 31 and the second spacing distance satisfy the following formula: L3 <y l ×L4, wherein y1 is 2.5 to 3.5. Preferably, y1 is 2.7 to 3.1. More preferably, y1 is 2.98. By limiting the above formula, light scattering waste is further avoided and energy utilization efficiency is improved.

[0076] In some embodiments, a gap d1 is defined between the transparent display 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 display panel 1 and the control circuit board 2, space is provided for the light-emitting element 4 and the light-shielding element 5.

[0077] In some embodiments, the light emitting element 4 is embedded in the light shielding element 5, and the light shielding element 5 can limit the emission angle of the light emitting element 4. With this arrangement, the distinction between adjacent key patterns on the transparent display panel 1 can be greatly improved.

[0078] Specifically, a plurality of light-transmitting holes are opened on the light-shielding member 5 to form a first light channel 51 for accommodating the light-emitting member 4 .

[0079] Specifically, the range of the gap d3 between the transparent display panel 1 and the control circuit board 2 is 2<d3≤10mm. The upper limit of the gap between the transparent display 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 display panel 1 and the control circuit board 2 can be, but not limited to, 2mm, 3mm, 4mm, etc. It can be understood that the gap between the transparent display 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 can be space to accommodate the shading member 5, and on the other hand, it can also make the majority of the light emitted by the light-emitting member 4 be concentrated on the transparent display panel 1.

[0080] In some embodiments, the touch switch includes a plurality of light-emitting elements 4 , and a plurality of first light channels 51 are provided on the light-shielding element 5 . The plurality of first light channels 51 correspond to the plurality of light-emitting elements 4 in a one-to-one manner.

[0081] Specifically, the plurality of first light channels 51 correspond to the touch area of ​​the transparent display panel 1. Specifically, the first light channels 51 are arranged above / below the touch area of ​​the transparent display panel 1. With this arrangement, the light from the light emitting element 4 can be irradiated onto the touch area of ​​the transparent display panel 1.

[0082] Specifically, the touch switch includes seven light-emitting elements 4 .

[0083] In some embodiments, the transparent display panel 1 is provided with a non-touch area, and the light shielding member 5 includes at least one light shielding portion. The light shielding portion corresponds to the non-touch area of ​​the transparent display panel 1. Specifically, the light shielding portion is disposed above or below the non-touch area of ​​the transparent display panel 1. With this arrangement, the light shielding portion can block light emitted by the light-emitting element 4, preventing it from irradiating the touch area of ​​the transparent display panel 1. Providing the light shielding portion on the light shielding member 5 prevents light from irradiating the non-touch area of ​​the transparent display panel 1, improving the distinction between adjacent buttons on the transparent display panel 1 and thereby enhancing the user experience.

[0084] Specifically, the light shielding member 5 includes a plurality of light shielding portions, each of which is arranged around each first light channel to form a plurality of light shielding areas.

[0085] In some embodiments, the shading member 5 includes a first shading layer and a second shading layer, the first shading layer is provided with four first light channels and four shading portions, and the second shading layer is provided with three first light channels and three shading portions.

[0086] In some embodiments, the light shielding element 5 is made of foam or plastic.

[0087] Specifically, the material of the shading element 5 is foam.

[0088] In some embodiments, the shading member 5 is fixedly connected to the control circuit board 2 .

[0089] In some embodiments, the light emitting element 4 is a spherical lamp bead. Setting the light emitting element 4 as a spherical lamp bead makes the light emitting angle of the light emitting element 4 smaller and the cross-lighting degree weaker, further improving the key distinction of the transparent display panel 1.

[0090] In some embodiments, the light emitting element 4 is a common lamp bead, which has a light emitting angle of up to 120° and needs to be used in conjunction with the light shielding element 5 .

[0091] In some embodiments, the height of the light shield 5 and the height of the light emitting element 4 satisfy the following formula: h1 ≥ z × h2, where z is 1.2, h1 is the height of the light shield 5, and h2 is the height of the light emitting element 4. This height refers to the height in the vertical direction perpendicular to the horizontal plane. A higher light shield has a smaller emission angle and more concentrated light. The height here refers to the height in the direction perpendicular to the control circuit board 2.

[0092] In some embodiments, the transparent display 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 in the transparent touch panel 1 are all light-transmissive, making the entire transparent touch panel 1 appear transparent. When applied to a range hood, the resulting touch-sensitive transparent switch not only enhances the range hood's aesthetics but also improves the user experience.

[0093] 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 display panel 1. The control circuit board 2 is electrically connected to the light-emitting element 4 and the transparent display panel 1, so that the control circuit board 2 controls the lighting and extinguishing of the corresponding key mark on the transparent display panel 1 based on the received electrical signal.

[0094] In some embodiments, the touch layer 106 includes a conductive coating and a substrate, and the conductive coating is coated on the substrate to form a touch area on the transparent display panel 1 .

[0095] In some embodiments, the conductive coating includes at least one of an ITO coating, a polymer coating, and a nanosilver coating. The conductive coating is configured to be a light-transmissive material, thereby improving the aesthetics of the touch-sensitive transparent switch.

[0096] Specifically, the polymer coating is a PEDOT coating.

[0097] In some embodiments, the touch layer 106 is ITO glass.

[0098] 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 touch-sensitive transparent switch is guaranteed while also ensuring the strength of the touch layer 106 and increasing its service life.

[0099] 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 display 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.

[0100] In some embodiments, the transparent display 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 .

[0101] In some embodiments, the transparent display 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 .

[0102] In some embodiments, the icon 103 is disposed on a side surface of the first transparent layer 104 .

[0103] 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.

[0104] In some embodiments, the icons of the transparent display panel 1 are disposed on a side surface of the touch layer 106 .

[0105] Specifically, the icon 103 may be provided on one side surface of the touch layer 106 by silk screen printing.

[0106] In some embodiments, the icon 103 may be disposed on the touch layer 106 of the transparent display panel 1 by using a laser inscription process.

[0107] 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 display panel 1 has a higher strength.

[0108] In some embodiments, the transparent display 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.

[0109] 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 display panel 1 and its high temperature resistance, thereby extending the service life of the touch-sensitive transparent switch.

[0110] 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.

[0111] 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 display panel 1 are more tightly bonded, and the transparent display panel 1 is more stable.

[0112] 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 .

[0113] In some embodiments, the transparent display 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.

[0114] 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.

[0115] 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.

[0116] In some embodiments, the preparation method of the transparent display 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 display panel 1.

[0117] 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.

[0118] Specifically, the machine used in the degassing treatment is a degassing machine.

[0119] In some embodiments, the preparation method of the transparent display panel 1 includes: coating OCA optical adhesive 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 adhesive to obtain a first pre-treated touch layer, coating OCA optical adhesive 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 adhesive, and performing a degassing treatment to obtain the transparent display panel 1.

[0120] 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.

[0121] Specifically, the machine used in the degassing treatment is a degassing machine.

[0122] This embodiment further provides a range hood comprising a fan frame 100, a fume hood 200, and a touch-sensitive transparent switch according to any of the above embodiments. The touch-sensitive transparent switch is mounted on the fan frame 100, and the transparent display panel 1 is at least partially independent of the exterior of the fan frame 100. Partial independence from the exterior of the fan frame 100 facilitates installation and replacement of the touch-sensitive transparent switch, and its relative independence minimizes the impact on other components if damaged.

[0123] Example 1

[0124] This embodiment provides a touch-sensitive transparent switch, which includes:

[0125] A transparent display panel 1, a control circuit board 2, a front housing 31, a light-emitting element 4, and a light-shielding element 5; the light-emitting element 4 is arranged on the control circuit board 2, and the light-shielding element 5 is arranged around the light-emitting element 4; the light-shielding element 5 is provided with a first light channel 51 corresponding to the light-emitting element 4, and the front housing 31 is provided with a second light channel 311, which is aligned with the edge of the transparent display panel 1 on the side close to the front housing 31; the first light channel 51 is connected to the second light channel 311, and at least a portion of the second light channel 311 extends away from the first light channel 51 and protrudes from the front housing 31.

[0126] Specifically, the front shell 31 is provided with an opening, which is located on the second light channel 311 , and at least a portion of the second light channel 311 extends away from the first light channel 51 and protrudes from the plane where the opening of the front shell 31 is located.

[0127] Specifically, the housing 3 includes a front shell 31 and a rear shell 32 .

[0128] The transparent display panel 1 is embedded in the second light channel 311 .

[0129] The second light channel 311 has a larger dimension in the length direction of the transparent display panel 1 than the first light channel 51 .

[0130] The width of the second light channel 311 in the thickness direction of the transparent display panel 1 is greater than that of the first light channel 51 .

[0131] There is a first spacing distance between the first light channel 51 and the second light channel 311. The size of the second light channel 311 in the length direction of the transparent display panel 1 and the first spacing distance satisfy the following formula: L1≥x×L2, where x is 10~18, L1 is the size of the second light channel 311 in the length direction of the transparent display panel 1, and L2 is the first spacing distance.

[0132] The transparent display panel 1 has an icon 103, and a second spacing distance is provided between the side of the second light channel 311 close to the icon 103 and the icon 103. The protruding height of the second light channel 311 on the front shell 31 and the second spacing distance satisfy the following formula: L3≤y×L4, where y is 2.98, L3 is the second spacing distance, and L4 is the protruding height of the second light channel 311 on the front shell 31.

[0133] A touch area with an icon 103 is provided on the transparent display panel 1, and the touch area is covered with a conductive coating. The light-emitting element 4 is arranged on the control circuit board 2 and is located on the side of the transparent display panel 1. The light emitted by the light-emitting element 4 enters from the side of the transparent display panel 1 and illuminates the icon.

[0134] The light emitting element 4 is embedded in the light shielding element 5 , and the light shielding element 5 can limit the emission angle of the light emitting element 4 .

[0135] Specifically, a plurality of light-transmitting holes are opened on the light-shielding member 5 to form a first light channel 51 for accommodating the light-emitting member 4 .

[0136] Specifically, the range of the gap d3 between the transparent display panel 1 and the control circuit board 2 is 2 <d3≤10mm。

[0137] The touch switch includes seven light-emitting elements 4, and the shading element 5 includes a first shading layer and a second shading layer. The first shading layer is provided with four first light channels and four shading portions, and the second shading layer is provided with three first light channels and three shading portions.

[0138] Specifically, the first light channel 51 is disposed below the touch area of ​​the transparent display panel 1 .

[0139] Specifically, the light shielding portion is disposed below the non-touch area of ​​the transparent display panel 1 .

[0140] The shading element 5 is fixedly connected to the control circuit board 2 .

[0141] The light-emitting element 4 is a spherical lamp bead.

[0142] The height of the shading member 5 and the height of the light emitting member 4 satisfy the following formula: h1≥1.2×h2, where h1 is the height of the shading member 5 and h2 is the height of the light emitting member 4.

[0143] The touch switch includes a shell 3, a cavity is provided inside the shell 3, and a control circuit board 2 is arranged in the cavity. The transparent display panel 1 includes a first portion 10 located outside the shell 3 and a second portion 11 located in the inner cavity of the shell 3. The area of ​​the first portion 10 accounts for a preset proportion of the total area of ​​the transparent display panel 1, and the preset proportion is 70%.

[0144] The transparent display panel 1 is connected to the housing 3, the plane where the control circuit board 2 is located intersects with the plane where the transparent display panel 1 is located, and the orthographic projection area of ​​the transparent display panel 1 on the control circuit board 2 is smaller than a first preset proportion of the total area of ​​the control circuit board 2, which is 1 / 9.

[0145] There is an acute angle α between the control circuit board 2 and the transparent display panel 1 , which satisfies 60°≤α<90°.

[0146] The front housing 31 is provided with a glue dispensing groove 301 for accommodating glue liquid. The glue dispensing groove 301 is arranged adjacent to the second light channel 311 and is communicated with the second light channel 311 .

[0147] The first portion 10 can pass through the second optical channel 311 until the second portion 11 is fixed in the housing 3 .

[0148] The transparent display panel 1 includes a limiting structure, and the housing 3 further includes a clamping member 33 . After the first portion 10 is able to pass through the second light channel, the limiting structure can be connected to the clamping member 33 to fix the second portion 11 in the housing 3 .

[0149] The transparent display panel 1 includes a first limiting structure 110 and a second limiting structure 111, and the shell 3 includes a first clamping member, a second clamping member and a third clamping member. The first limiting structure 110 of the transparent display panel 1 is clamped with the first clamping member, the second limiting structure 111 is clamped with the second clamping member, and the middle part of one side of the transparent display panel 1 is clamped with the third clamping member.

[0150] Specifically, the first clamping member, the second clamping member and the third clamping member are fixedly connected to the control circuit board 2 respectively.

[0151] The rear shell 32 is recessed to form a receiving groove, and the control circuit board 2 is placed in the receiving groove.

[0152] 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.

[0153] 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 .

[0154] The touch-sensitive transparent switch further includes a back plate 34 , which is fixedly connected to the rear housing 32 .

[0155] The touch-sensitive transparent switch further includes a sealing member 35 , which is sleeved on the rear housing 32 .

[0156] The switch further includes a packaging member 36 , which is provided with an opening. The portion of the second light channel 311 protruding from the front housing 31 passes through the opening and protrudes from the packaging member 36 .

[0157] The transparent display panel 1 passes through the packaging member 36 through the opening.

[0158] A first chamfered structure 302 and a second chamfered structure 303 are provided on one end of the side wall of the second optical channel 311 facing the control circuit board 2 .

[0159] The transparent display panel 1 is T-shaped and includes at least a transverse portion 109 and a vertical portion. Along the length direction of the transparent display 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.

[0160] A first arc-shaped portion 101 and a second arc-shaped portion 102 are respectively formed on two edges of the first portion 10 .

[0161] Specifically, the first arc-shaped portion 101 and the R corner radius of the first arc-shaped portion 101 meet: R ≥ 2 mm.

[0162] The transparent display panel 1 further includes a first transparent layer 104, a second transparent layer 108, a first optical adhesive layer 105, a second optical adhesive layer 107 and a touch layer 106. 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.

[0163] Specifically, the first optical adhesive layer 105 and the second optical adhesive layer 107 are both formed by curing OCA optical adhesive.

[0164] The first transparent layer 104 and the second transparent layer 108 are both glass transparent layers.

[0165] The thickness ratio between the first transparent layer 104 and the first optical adhesive layer 105 is 1:10, and the thickness ratio between the second transparent layer 108 and the second optical adhesive layer 107 is 1:10.

[0166] The thickness of the first optical adhesive layer 105 and the second optical adhesive layer 107 are both 0.125-0.3 mm.

[0167] An anti-fingerprint coating is provided on a surface of the first transparent layer 104 away from the touch layer 106 .

[0168] The icon 103 is provided on one side surface of the first transparent layer 104 .

[0169] The transparent display 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 .

[0170] The control circuit board 2 is electrically connected to the light-emitting element 4 and the transparent display panel 1 .

[0171] The touch layer 106 is ITO glass.

[0172] The thickness of the touch layer 106 is 0.1-0.2 mm.

[0173] The orthographic projection areas of the first optical adhesive layer 105 and the second optical adhesive layer 107 on the control circuit board 2 are both smaller than a second preset ratio of the total area of ​​the control circuit board 2 , and the second preset ratio is 1 / 200.

[0174] The working principle of the touch-sensitive transparent switch is as follows: the light emitted by the light-emitting element 4 passes through the first light channel 51 , and then passes through the second light channel 311 before being irradiated onto the icon 103 of the transparent display panel 1 .

[0175] 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.

[0176] 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.

[0177] In the absence of conflict, the above embodiments and features in the embodiments can be combined with each other.

[0178] 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 touch-sensitive transparent switch, characterized in that: Comprising: A transparent display panel (1), a control circuit board (2), a front shell (31), a light-emitting component (4) and a light-shielding component (5); the light-emitting component (4) is arranged on the control circuit board (2), and the light-shielding component (5) is arranged around the light-emitting component (4); A first light channel (51) corresponding to the light-emitting component (4) is provided on the light-shielding component (5), and a second light channel (311) is provided on the front shell (31), and the second light channel (311) is arranged in alignment with the edge of the transparent display panel (1) on the side close to the front shell (31); The first light channel (51) is communicated with the second light channel (311), and at least a part of the second light channel (311) extends in a direction away from the first light channel (51) and protrudes from the front shell (31).

2. The touch-sensitive transparent switch according to claim 1, characterized in that: The switch further includes a packaging component (36), and an opening is provided on the packaging component (36), and the part of the second light channel (311) protruding from the front shell (31) passes through the opening and protrudes from the packaging component (36).

3. The touch-sensitive transparent switch according to claim 1, characterized in that: The size of the second light channel (311) in the length direction of the transparent display panel (1) is larger than that of the first light channel (51).

4. The touch-sensitive transparent switch according to claim 1, characterized in that: The width of the second light channel (311) in the thickness direction of the transparent display panel (1) is larger than that of the first light channel (51).

5. The touch-sensitive transparent switch according to claim 1, characterized in that: There is a first spacing distance between the first light channel (51) and the second light channel (311), and the size of the second light channel (311) in the length direction of the transparent display panel (1) and the first spacing distance satisfy the following formula: L1≥x×L2, where x is 10 to 18, L1 is the size of the second light channel (311) in the length direction of the transparent display panel (1), and L2 is the first spacing distance.

6. The touch-sensitive transparent switch according to claim 5, characterized in that: The size of the second light channel (311) in the length direction of the transparent display panel (1) and the first spacing distance satisfy the following formula: L1>x1×L2, where x1 is 13 to 16.

7. The touch-sensitive transparent switch according to any one of claims 1 to 6, characterized in that: An icon (103) is provided on the transparent display panel (1), and there is a second spacing distance between the side of the second light channel (311) close to the icon (103) and the icon (103), and the protruding height of the second light channel (311) on the front shell (31) and the second spacing distance satisfy the following formula: L3≤y×L4, where y is 1.5 to 5, L3 is the second spacing distance, and L4 is the protruding height of the second light channel (311) on the front shell (31).

8. The touch-sensitive transparent switch according to claim 7, characterized in that: The protruding height of the second light channel (311) on the front shell (31) and the second spacing distance satisfy the following formula: L3<y1×L4, where y1 is 2.5 to 3.

5.

9. The touch-sensitive transparent switch according to any one of claims 1 to 6, characterized in that: The light-emitting component (4) is embedded in the light-shielding component (5), and the light-shielding component (5) can limit the emission angle of the light-emitting component (4).

10. The touch-sensitive transparent switch according to any one of claims 1 to 6, characterized in that: The height of the shading member (5) and the height of the luminous member (4) satisfy the following formula: h1≥z×h2, wherein z is 1.2, h1 is the height of the shading member (5), and h2 is the height of the luminous member (4).

11. The touch-sensitive transparent switch according to any one of claims 1 to 6, characterized in that: The front shell (31) is provided with a glue dispensing groove (301) for accommodating glue liquid, and the glue dispensing groove (301) is arranged adjacent to the second light channel (311) and is in communication with the second light channel (311).

12. A range hood, characterized in that: The invention comprises a fan rack (100), a smoke collecting hood (200) and a touch-sensitive transparent switch according to any one of claims 1 to 11, wherein the touch-sensitive transparent switch is mounted on the fan rack (100), and the transparent display panel (1) is at least partially independent of the outside of the fan rack (100).

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