Sun visor and vehicle

Abstract

The application provides a sun visor and a vehicle; the sun visor comprises a sun visor body, which has a folded state and an unfolded state relative to a roof; a pressure sensor is used for detecting the pressure received by the sun visor body and sending a pressure signal, the pressure sensor is electrically connected with a seat adjustment controller and is arranged on the sun visor body. The pressure received by the sun visor body is detected by the pressure sensor and the pressure signal is sent to the seat adjustment controller; the seat adjustment controller controls the adjustment of the seat according to the pressure received by the sun visor body; the seat can be controlled to stop adjusting when the pressure received by the sun visor body reaches a target pressure threshold, and a warning structure can be controlled to output a warning signal for warning. In this way, the pressure received by the sun visor body can be prevented from exceeding the target pressure threshold, so that the pressure received by the sun visor body is reduced, the sun visor is prevented from being damaged by the headrest of the seat, and the service life of the sun visor is prolonged.

Description

Technical Field

[0001] This application relates to the field of vehicle seat adjustment technology, specifically to a sun visor, and also to a vehicle. Background Technology

[0002] During vehicle use, the position of the front seats needs to be adjusted according to different user needs. For example, in some new energy vehicles, the rear seats can be reclined with a single touch to create a more spacious and flat resting area, thus meeting the user's need to lie down during long journeys; in this case, the front seats need to be adjusted forward and upward. However, during seat adjustment, it is easy for the seat headrest to press against the sun visor, damaging the sun visor and affecting its lifespan. Utility Model Content

[0003] The purpose of this application is to provide a sun visor and a vehicle including the sun visor, so as to prevent the seat headrest from damaging the sun visor and extend the service life of the sun visor.

[0004] To achieve the above objectives, this application provides the following technical solution: A sunshade, comprising: The sun visor itself has a folded state and an unfolded state relative to the roof; A pressure sensor is used to detect the pressure on the sun visor body and send a pressure signal. The pressure sensor is electrically connected to the seat adjustment controller and is disposed on the sun visor body.

[0005] Optionally, in the above-mentioned sun visor, a lens is provided on the sun visor body, and the lens is disposed on the side of the sun visor body facing the rear of the vehicle in the unfolded state, and the lens includes an outward-facing front and an inward-facing back. The pressure sensor is located on the back of the lens, and the pressure sensor detects the pressure on the sun visor body by detecting the pressure on the lens.

[0006] Optionally, in the above-mentioned sun visor, the pressure sensor is attached to the back of the lens.

[0007] Optionally, in the above-mentioned sun visor, the pressure sensor is attached to the back of the lens by adhesive, and the adhesive is arranged in a dotted or mesh pattern. And / or, the back surface of the lens is roughened.

[0008] Optionally, in the above-mentioned sun visor, the sun visor body has a mounting cavity on the side facing the rear of the vehicle in the unfolded state, and the lens and the pressure sensor are disposed in the mounting cavity.

[0009] Optionally, the sun visor described above also includes a lens cover that can cover the outer side of the front of the lens, and the lens cover is detachably disposed at the opening of the mounting cavity.

[0010] Optionally, in the above-mentioned sunshade, the pressure sensor is a force-sensitive resistor.

[0011] Optionally, in the above-mentioned sunshade, the pressure sensor includes a first electrode layer, a second electrode layer, and a piezoresistive material layer disposed between the first electrode layer and the second electrode layer, wherein the resistance of the piezoresistive material layer can change with the pressure applied.

[0012] This application also provides a vehicle, including a roof, a seat, a sun visor disposed on the roof, and a seat adjustment controller for controlling the movement of the seat; the sun visor is any of the sun visors described above, the seat adjustment controller is electrically connected to a pressure sensor of the sun visor, and the seat adjustment controller can control the seat to stop adjusting and / or control a warning structure to output a warning signal when the pressure on the sun visor body reaches a target pressure threshold.

[0013] Optionally, in the aforementioned vehicles, the target pressure threshold is 50N-100N.

[0014] The sun visor provided in this application can be stacked on the roof when the sun visor body is folded relative to the roof, which can reduce the space occupied; when the sun visor body is unfolded relative to the roof, it can block sunlight, avoid glare, and improve passenger comfort.

[0015] In the application of the sun visor provided in this application, a pressure sensor is electrically connected to the seat adjustment controller. The pressure sensor detects the pressure on the sun visor body and sends a pressure signal to the seat adjustment controller. After receiving the pressure signal, the seat adjustment controller controls the seat adjustment based on the pressure on the sun visor body. It can control the seat to stop adjusting when the pressure on the sun visor body reaches a target pressure threshold, or it can control a warning structure to output a warning signal to stop seat adjustment. This prevents the pressure on the sun visor body from exceeding the target pressure threshold, thereby reducing the pressure on the sun visor body, preventing the headrest from damaging the sun visor, and thus extending the service life of the sun visor. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be introduced below. The accompanying drawings described below are merely embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0017] Figure 1 A schematic diagram of an exemplary sun visor mounted on a vehicle roof, consistent with some embodiments of this application, is shown.

[0018] Figure 2 It shows Figure 1 Enlarged view of a local structure.

[0019] Figure 3 A three-dimensional structural diagram of an exemplary sun visor in one direction is shown, consistent with some embodiments of this application.

[0020] Figure 4 A three-dimensional structural schematic diagram of an exemplary sun visor in another direction, consistent with some embodiments of this application, is shown.

[0021] Figure 5 A schematic diagram of an exemplary pressure sensor consistent with some embodiments of this application is shown.

[0022] in, Figures 1-5 middle: 10-Sun visor; 20-Roof; 1-Sun visor body; 2-Pressure sensor; 3-Lens; 4-Mirror cover. Detailed Implementation

[0023] The embodiments of this application will be described below. It should be noted that, in order to provide a concise description of these embodiments, this specification cannot provide a detailed description of all features of the actual embodiments. It should be understood that, in the actual implementation of any embodiment, changes may occur from one embodiment to another to achieve specific objectives. Furthermore, it is also understood that, although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content of this application, some design, manufacturing, or production modifications based on the technical content disclosed in this application are merely conventional technical means and should not be construed as insufficient content of this application.

[0024] like Figures 1-5 As shown, the sun visor 10 provided in this application embodiment includes a sun visor body 1, which has a folded state and an unfolded state relative to the roof 20; a pressure sensor 2, which is used to detect the pressure on the sun visor body 1 and send a pressure signal, and the pressure sensor 2 is used to be electrically connected to the seat adjustment controller, and the pressure sensor 2 is disposed on the sun visor body 1.

[0025] The sun visor 10 provided in this application embodiment can be stacked on the roof 20 when the sun visor body 1 is folded relative to the roof 20, which can reduce the space occupied; when the sun visor body 1 is unfolded relative to the roof 20, it can block sunlight, avoid glare, and improve passenger comfort.

[0026] In the application of the sun visor 10 provided in this embodiment, the pressure sensor 2 is electrically connected to the seat adjustment controller. The pressure sensor 2 detects the pressure on the sun visor body 1 and sends a pressure signal to the seat adjustment controller. After receiving the pressure signal, the seat adjustment controller controls the seat adjustment according to the pressure on the sun visor body 1. It can control the seat to stop adjusting when the pressure on the sun visor body 1 reaches the target pressure threshold, or it can control the warning structure to output a warning signal to warn of the stop of seat adjustment. This can prevent the pressure on the sun visor body 1 from exceeding the target pressure threshold, thereby reducing the pressure on the sun visor body 1, preventing the seat headrest from damaging the sun visor 10, and thus extending the service life of the sun visor 10.

[0027] It should be noted that the aforementioned target pressure threshold is determined based on the compressibility of the sun visor body 1, and must be less than the minimum pressure required for the sun visor body 1 to be crushed. The pressure sensor 2 can cover the weakest area of ​​the sun visor body 1, or it can cover the entire area of ​​the sun visor body 1.

[0028] In some embodiments, a lens 3 is provided on the sun visor body 1. The lens 3 is located on the side of the sun visor body 1 facing the rear of the vehicle when the sun visor body 1 is in the unfolded state. The lens 3 includes an outward-facing front and an inward-facing back. A pressure sensor 2 is located on the back of the lens 3. The pressure sensor 2 detects the pressure on the sun visor body 1 by detecting the pressure on the lens 3.

[0029] The sun visor 10 provided in this application embodiment has a lens 3. When the sun visor body 1 is in the unfolded state relative to the roof 20, the front of the lens 3 faces the rear of the vehicle, and the lens 3 can be used to tidy up one's appearance, thus increasing the uses of the sun visor 10.

[0030] This configuration allows the pressure sensor 2 to detect the pressure on the lens 3 and send a pressure signal to the seat adjustment controller. Upon receiving the pressure signal, the seat adjustment controller controls the seat adjustment based on the pressure on the lens 3. It can stop seat adjustment when the pressure on the lens 3 reaches a target pressure threshold, or it can control the warning structure to output a warning signal to stop seat adjustment. This prevents the pressure on the lens 3 from exceeding the target pressure threshold, thereby reducing the pressure on the lens 3 and preventing the headrest from damaging the lens 3 inside the sun visor 10, thus reducing safety hazards.

[0031] It should be noted that the aforementioned target pressure threshold is determined based on the compressibility of lens 3 and needs to be less than the minimum pressure required for lens 3 to be crushed. Pressure sensor 2 can cover the weakest area on the back of lens 3, or it can cover the entire back of lens 3.

[0032] Optionally, lens 3 may be made of a reflective material, such as glass or reinforced plastic.

[0033] In some embodiments, the pressure sensor 2 is attached to the back of the lens 3. By attaching the pressure sensor 2 to the back of the lens 3, it can be installed onto the sun visor body 1 along with the lens 3, facilitating assembly and reducing cost. In other embodiments, the pressure sensor 2 can also be attached to the back of the lens 3 in other ways, such as by using a clamping or binding structure to ensure a tight fit between the pressure sensor 2 and the lens 3.

[0034] In some embodiments, the pressure sensor 2 is attached to the back of the lens 3 using adhesive, which is arranged in a dotted or mesh pattern. The adhesive can be distributed in a dotted or mesh pattern covering the entire back of the lens 3, or only a portion thereof. This dotted or mesh-like arrangement of the adhesive between the pressure sensor 2 and the lens 3 ensures a tight fit between the pressure sensor 2 and the lens 3, thereby improving detection accuracy. It also reduces the amount of adhesive used, simplifies operation, and lowers cost. It can be understood that the adhesive can also be distributed across the entire back of the lens 3 or arranged in other shapes such as multiple rings.

[0035] For example, double-sided adhesive can be used for the connection, with one side attached to the back of lens 3 and the other side attached to pressure sensor 2. Alternatively, flexible silicone adhesive can be used, which has good temperature resistance (-40℃~120℃), good aging resistance, and adapts to temperature changes inside the vehicle, ensuring reliable fixation.

[0036] In some embodiments, the back surface of the lens 3 is roughened. For example, the back surface of the lens 3 can be cleaned by processes such as plasma treatment or sandblasting to roughen its surface, improve surface adhesion, enhance the bonding strength with the adhesive, and thus improve the bonding strength between the lens 3 and the pressure sensor 2, ensuring the operational reliability of the pressure sensor 2. Specifically, when assembling the lens 3 and the pressure sensor 2, the back surface of the lens 3 is first cleaned to improve adhesion; then, adhesive is applied by dispensing or screen printing as the adhesive; then, the pressure sensor 2 can be precisely attached to the back surface of the lens 3 using automated suction cup positioning and pressure roller pressing methods; finally, the adhesive is cured at ≤80°C by ultraviolet curing or thermal curing to prevent deformation of the lens 3, thereby ensuring that the pressure sensor 2 is tightly attached to the back surface of the lens 3, enabling the pressure sensor 2 to accurately detect the pressure on the lens 3.

[0037] In some embodiments, the sun visor body 1, when unfolded, has a mounting cavity on the side facing the rear of the vehicle, and the lens 3 and pressure sensor 2 are disposed within the mounting cavity. The mounting cavity has an opening facing the rear of the vehicle, allowing the lens 3, along with the pressure sensor 2, to be inserted into the mounting cavity through the opening. The protruding edges around the opening prevent the lens 3 from being blocked on the outside of its front, thus achieving a simple installation and fixation. In this way, the lens 3 can be built into the sun visor body 1, providing better protection for the lens 3, reducing pressure on the lens 3, and minimizing safety hazards. The lens 3 can also be fixed to the surface of the sun visor body 1.

[0038] In some embodiments, the sun visor 10 further includes a lens cover 4 that can cover the outer side of the front of the lens 3. The lens cover 4 is detachably disposed at the opening of the mounting cavity. Figures 3-4 As shown. For example, the lens cover 4 is rotatably connected to the sun visor body 1 via a hinge shaft, allowing the lens cover 4 to be flipped. When the lens 3 is in use, the lens cover 4 is opened to expose the lens 3; when the lens 3 is not in use, the lens cover 4 is fastened to the outside of the lens 3, which can protect the lens 3, reduce bumps and pressure on the lens 3, and reduce the risk of the lens 3 breaking.

[0039] In some embodiments, the pressure sensor 2 is a force-sensitive resistor. For example... Figure 5 As shown, a force-sensing resistor (FSR), also known as a force-sensing resistor, is a sensor that converts pressure or touch into a change in resistance. It is characterized by its thinness, high sensitivity, and fast response. It has a simple structure, low cost, and good accuracy in detecting pressure applied to lens 3.

[0040] In addition, the force-sensitive resistor is also a thin-film sensor based on piezoresistive materials. The force-sensitive resistor is sheet-shaped and flexible, tightly fitted to lens 3 to ensure uniform pressure distribution during detection. The piezoresistive sheet is integrated with an embedded circuit board that includes a signal amplifier, a microcontroller (such as a single-chip microcomputer), and a threshold comparator, capable of converting the resistance value into a pressure signal.

[0041] When the headrest angle is rotated and presses against the lens 3 of the sun visor 10, the force-sensitive resistor is compressed, and its resistance value changes linearly with the pressure. This resistance value is converted into a pressure signal and sent to the seat adjustment controller. When the pressure on the lens 3 reaches the target pressure threshold, the seat adjustment controller controls the seat to stop adjusting and / or controls the warning structure to output a warning signal to alert the occupant to stop adjusting the seat. This can reduce the damage rate of the lens 3 by more than 90%, effectively improving occupant protection.

[0042] Optionally, the force-sensitive resistor thickness is 0.45mm (with double-sided adhesive), forming a flexible sheet. The trigger force is 10g, and triggering occurs when the default resistance value is less than 200kΩ. The pressure sensing range is 10g~20kg. The pressure application mode is static or dynamic (frequency within 10Hz). The resistance is greater than 10MΩ when not triggered. The activation time is less than 0.01S. The operating temperature is -40℃~+85℃. Durability exceeds 1 million cycles. The response time is <10ms. It does not generate electromagnetic interference and is insensitive to electrostatic discharge.

[0043] In some embodiments, the pressure sensor 2 includes a first electrode layer, a second electrode layer, and a piezoresistive material layer disposed between the first electrode layer and the second electrode layer. The resistance of the piezoresistive material layer can change with the applied pressure. The pressure sensor 2 is a multilayer thin-film sensor formed by the first electrode layer, the piezoresistive material layer, and the second electrode layer, and its resistance change is caused by the deformation of the piezoresistive material layer.

[0044] The piezoresistive material layer, as the core functional layer, is usually composed of force-sensitive materials, such as doped silicon, zinc oxide, flexible polymer composites, carbon nanotubes, or other semiconductor polymers.

[0045] When an external force (such as headrest pressure) is applied to the lens 3 of the sun visor 10, the pressure is transmitted to the piezoresistive material layer, causing the material lattice to compress and deform. The mobility of charge carriers (electrons / holes) inside the piezoresistive material layer changes, thereby causing the overall resistance value to change. This resistance value changes linearly with the pressure. The first electrode layer and the second electrode layer transmit the resistance value to the circuit board. The circuit board can convert the resistance value into a pressure signal and send it to the seat adjustment controller, thereby realizing the detection of the pressure on the lens 3.

[0046] This application also provides a vehicle, including a roof 20, a seat, a sun visor 10 disposed on the roof 20, and a seat adjustment controller for controlling the movement of the seat; the sun visor 10 is the sun visor 10 of any of the above embodiments, the seat adjustment controller is electrically connected to the pressure sensor 2 of the sun visor 10, and the seat adjustment controller can control the seat to stop adjusting and / or control the warning structure to output a warning signal when the pressure on the sun visor body 1 reaches a target pressure threshold.

[0047] The vehicle provided in this application embodiment: The sun visor 10 detects the pressure on the sun visor body 1 via a pressure sensor 2 and sends a pressure signal to the seat adjustment controller; after receiving the pressure signal, the seat adjustment controller controls the seat adjustment according to the pressure on the sun visor body 1; it can control the seat to stop adjusting when the pressure on the sun visor body 1 reaches a target pressure threshold; it can also control the warning structure to output a warning signal to warn of the cessation of seat adjustment. This avoids the pressure on the sun visor body 1 exceeding the target pressure threshold, thereby reducing the pressure on the sun visor body 1, preventing the seat headrest from damaging the sun visor 10, and thus extending the service life of the sun visor.

[0048] The seat adjustment can be automatic or manual. The warning mechanism can be a warning light or an audible alarm, which will promptly remind the user to stop adjusting the seat by flashing the light or emitting a warning sound.

[0049] A lens 3 may be provided on the sun visor body 1. The lens 3 is located on the side of the sun visor body 1 facing the rear of the vehicle when the sun visor body 1 is in the unfolded state. The lens 3 includes an outward-facing front and an inward-facing back. A pressure sensor 2 is located on the back of the lens 3. The pressure sensor 2 detects the pressure on the sun visor body 1 by detecting the pressure on the lens 3. For example, when the rear seat is adjusted to a one-touch reclining position, the front seat moves forward and touches the lens 3 of the sun visor 10, thereby touching the pressure sensor 2 on the back of the lens 3. When the pressure on the lens 3 reaches the target pressure threshold, the seat automatically stops adjusting. This is to prevent excessive pressure from the headrest from damaging the lens 3 inside the sun visor 10, or even causing broken glass to fall out and injure the occupants of the vehicle.

[0050] The sun visor 10 can be installed in the front area of ​​the vehicle roof, directly above the driver's and passenger's seats; it is fixed to the inner edge of the roof of the windshield, located in front of the driver and front passenger's heads (at the junction of the roof lining 20 and the windshield); it is connected to the roof 20 via a rotating shaft, allowing for free angle adjustment, and can also slide laterally or extend. By flipping down (or rotating sideways), the sun visor 10 can block sunlight from the front or sides of the vehicle, reducing glare that interferes with the driver's vision.

[0051] In some embodiments, the target pressure threshold is 50N-100N. The target pressure threshold can be the minimum pressure required for the sun visor body 1 to be damaged or the lens 3 to be crushed. This minimum pressure value varies depending on the different materials and thicknesses of the sun visor body 1 and the lens 3, and the aforementioned target pressure threshold can be adaptively selected. For example, when adjusting the rear seat to a one-touch reclining position, when the pressure detected by the pressure sensor 2 reaches 80N (simulating a headrest compression scenario), the seat adjustment controller can activate the warning light or the seat adjustment motor to alleviate the pressure source.

[0052] The seat adjustment controller can be a body control module (BCM) or a separate controller.

[0053] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details of the above application are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0054] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Unless otherwise defined, the technical or scientific terms used in the claims and description should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar words used in the patent application description and claims of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms "an" or "a" and similar words do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" and similar words mean that the element or object preceding "comprising" or "including" encompasses the element or object listed following "comprising" or "including" and its equivalents, and do not exclude other elements or objects. The terms "connected," "coupled," or "linked" and similar words are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections. Words such as “including,” “contains,” and “has” are open-ended words that mean “including but not limited to” and can be used interchangeably with them.

[0055] In this application, the terms "or" and "and / or" describe the relationship between related objects and indicate a non-exclusive inclusion. For example, "A and / or B" and "A or B" can include: only "A" exists, only "B" exists, and both "A" and "B" exist simultaneously, where "A" and "B" can be singular or plural. As another example, "A, B, and / or C" and "A, B, or C" can include: only "A" exists, only "B" exists, only "C" exists, both "A" and "B" exist simultaneously, both "A" and "C" exist simultaneously, both "B" and "C" exist simultaneously, and both "A", "B", and "C" exist simultaneously, where "A", "B", and "C" can be singular or plural. Furthermore, the symbol " / " in this application indicates an "or" relationship between the related objects before and after the symbol. In this application, the term "at least one A or B" has the same meaning as the aforementioned "A or B". The term "at least one A, B or C" has the same meaning as "A, B or C" above.

[0056] In the apparatus and equipment of this application, the components can be disassembled and / or reassembled. These disassemblies and / or reassemblies should be considered as equivalent solutions of this application.

[0057] The above description of the claimed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be applied within the widest scope consistent with the principles and novel features of this application.

[0058] The above description has been given for illustrative and descriptive purposes. Furthermore, this description is not intended to limit the embodiments of this application to the forms described herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A sunshade, characterized in that, include: The sun visor itself has a folded state and an unfolded state relative to the roof; A pressure sensor is used to detect the pressure on the sun visor body and send a pressure signal. The pressure sensor is electrically connected to the seat adjustment controller and is disposed on the sun visor body.

2. The sunshade according to claim 1, characterized in that, The sun visor body is provided with a lens, which is located on the side of the sun visor body facing the rear of the vehicle in the unfolded state. The lens includes an outward-facing front and an inward-facing back. The pressure sensor is located on the back of the lens, and the pressure sensor detects the pressure on the sun visor body by detecting the pressure on the lens.

3. The sunshade according to claim 2, characterized in that, The pressure sensor is attached to the back of the lens.

4. The sunshade according to claim 3, characterized in that, The pressure sensor is attached to the back of the lens using adhesive, which is arranged in a dotted or mesh pattern. And / or, the back surface of the lens is roughened.

5. The sunshade according to claim 2, characterized in that, The sun visor body has a mounting cavity on the side facing the rear of the vehicle in the unfolded state, and the lens and the pressure sensor are disposed in the mounting cavity.

6. The sunshade according to claim 5, characterized in that, It also includes a lens cap that can cover the outer side of the front of the lens, the lens cap being detachably disposed at the opening of the mounting cavity.

7. The sunshade according to claim 1, characterized in that, The pressure sensor is a force-sensitive resistor.

8. The sunshade according to any one of claims 1-7, characterized in that, The pressure sensor includes a first electrode layer, a second electrode layer, and a piezoresistive material layer disposed between the first electrode layer and the second electrode layer. The resistance of the piezoresistive material layer can change with the applied pressure.

9. A vehicle, comprising a roof, seats, a sun visor disposed on the roof, and a seat adjustment controller for controlling the movement of the seats; characterized in that, The sun visor is the sun visor as described in any one of claims 1-8. The seat adjustment controller is electrically connected to the pressure sensor of the sun visor. The seat adjustment controller can control the seat to stop adjusting and / or control the warning structure to output a warning signal when the pressure on the sun visor body reaches a target pressure threshold.

10. The vehicle according to claim 9, characterized in that, The target pressure threshold is 50N-100N.

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