Haircare appliance

Abstract

An attachment for a haircare appliance, the attachment having an air inlet, a curved surface and first and second air outlets, the curved surface being adjacent and downstream of the first and second air outlets, the first and second air outlets being for directing a flow of air across the curved surface in respective opposite directions. The attachment has a switching member for switching the flow of air between the first and second air outlets, the switching member being movable from a first switching position in which the flow of air is across the curved surface through the first air outlet and not through the second air outlet, to a second switching position in which the flow of air is across the curved surface through the second air outlet and not through the first air outlet. The attachment has a retention mechanism for retaining the switching member in one of the first and second switching positions in the absence of a user of the haircare appliance applying a force to the switching member.

Description

Technical Field

[0001] This invention relates to a hair care tool and an accessory for the hair care tool. Background Technology

[0002] Hair styling tools are commonly used for drying and styling hair. When using hair styling tools to create a smooth look, the presence of shorter or broken hairs, sometimes referred to as flyaways, can affect the desired smoothness. Summary of the Invention

[0003] According to a first aspect of the invention, an accessory for a hair care device is provided, the accessory comprising an air inlet, a curved surface, first and second air outlets, the curved surface being adjacent to and downstream of the first and second air outlets, the first and second air outlets being used to guide airflow across the curved surface in opposite directions; an airflow generator for generating airflow from the air inlet to the first and second air outlets; a switching member for switching the airflow between the first and second air outlets, the switching member being movable from a first switching position to a second switching position, in the first switching position, the airflow crossing the curved surface through the first air outlet without passing through the second air outlet, and in the second switching position, the airflow crossing the curved surface through the second air outlet without passing through the first air outlet; and a retaining mechanism for holding the switching member in one of the first and second switching positions without the user of the accessory applying force to the switching member.

[0004] The appendix to the invention, based on the first aspect, may be advantageous because the inventors of this application have determined that guiding the airflow across a curved surface can create a negative pressure zone near the curved surface that attracts longer hair toward the curved surface, while the interaction between the airflow and the hair also pushes shorter hair away from the curved surface. This may result in shorter hair being pushed past longer hair, for example, through the longer hair toward the side of the hair facing the user's head, thereby providing smoothness.

[0005] This accessory can be configured such that the airflow exiting the first and second air outlets generates a first force that draws the hair toward the curved surface and a second force that pushes the hair away from the curved surface. Smoothness can be achieved by simultaneously drawing long hair toward the curved surface and pushing short hair away from the curved surface through the long hair, as described above. The accessory can be configured to create a negative pressure zone near the curved surface during use.

[0006] The attachment according to the first aspect of the invention may be advantageous because, depending on the position of the switching member and thus the direction of the airflow across the curved surface, the attachment can be used in two different modes. For example, the switching member can be positioned in a first switching position to style the hair on a first side of the head, and in a second switching position to style the hair on a second side of the head.

[0007] The attachment according to the first aspect of the invention may be advantageous because, without the user applying force to the switching member, the switching member is held in a first or second position by a retaining mechanism, allowing the user to change the orientation of the attachment without the switching member moving between the first and second positions. This allows the user to style curls in the hair, for example, by rotating the attachment.

[0008] The retaining mechanism allows users to use the accessory in various orientations, while the switching component does not move between the first and second switching positions.

[0009] The first air outlet can be arranged to guide airflow across the curved surface in a first direction, and the second air outlet can be arranged to guide airflow across the curved surface in the opposite second direction. This may help allow the accessory to be used on the body side of the hair.

[0010] The size and shape of the first and second air outlets can be substantially equal. This helps ensure that the air velocity across the curved surface is equal when the switching member is in the first or second switching position, given the same airflow generated by the airflow generator. This also helps ensure uniform shaping on both sides of the head.

[0011] The first and second air outlets may include rectangular slots that can provide a more laminar airflow across the curved surface and allow the airflow across the curved surface to contact a larger area of ​​hair, thereby enabling styling with attachments.

[0012] The curved surface may include a Coanda surface, such as a convex surface, along which airflow adheres due to the Coanda effect in use.

[0013] The curved surface can be substantially smooth and continuous in form, for example, without any bumps and / or depressions. This allows hair to wrap around the curved surface during use.

[0014] The curved surface may include a radius of curvature ranging from 10 mm to 60 mm. The applicant has discovered that such a radius of curvature can particularly effectively generate airflow along the curved surface, which produces a first force drawing hair towards the curved surface and a second force pushing the hair away from the curved surface. The curved surface may include a substantially constant radius of curvature.

[0015] The retaining mechanism can be arranged to hold the switching member in one of the first and second switching positions when the user applies a force to the switching member. This assures the user that the switching member is correctly positioned. It also ensures that airflow crosses the curved surface in the correct direction for better shaping performance.

[0016] The holding mechanism may include a first pair of magnetic elements configured to hold the switching member in a first switching position and a second pair of magnetic elements configured to hold the switching member in a second switching position. Each magnetic element in a pair is magnetically attracted to the other magnetic element in that pair. This can provide a simple mechanism for holding the switching member in a desired switching position and for a user to apply force to the pair of magnetic elements to move the switching member to another switching position. For example, the first magnetic element of each of the first and second pairs of magnetic elements may be located within the switching mechanism, and the second magnetic elements of each of the first and second pairs of magnetic elements may be located in adjacent positions within the attachment, with the first magnetic element attracted to the second magnetic element.

[0017] The retaining mechanism may include a releasable mechanical fastener for holding the switching member in a first and second switching position. For example, the releasable mechanical fastener may include a hook, pawl, or snap. This provides a simple way to hold the switching member in place until the user applies force, which can reduce manufacturing and assembly complexity.

[0018] The holding mechanism may include a biasing element for biasing the switching member to first and second switching positions. For example, the holding mechanism may include a bistable spring that is stable when the switching member is in the first and second switching positions. The biasing element helps ensure that the switching member correctly reaches the first and second switching positions to ensure proper switching of airflow between the first and second air outlets. The biasing element may also increase the force required to move the switching member between the first and second switching positions, which can help prevent unintentional movement of the switching member.

[0019] The force used to move the switching member between the first and second switching positions can be a contact force applied to the switching member. This provides the advantage that the user can clearly identify that the switching member has been moved because the user has directly applied a force to the switching member.

[0020] The minimum force required to overcome the retaining mechanism to move the switching member between the first and second switching positions can be in the range of up to 5 N. The minimum force required to overcome the retaining mechanism to move the switching member between the first and second switching positions can be in the range of 0.3 N to 3 N. The inventors of this application have discovered that such a force may be suitable for a user to apply to the switching member to move the switching member and prevent unintentional movement of the switching member during normal use of the accessory.

[0021] The accessory may include a user interface operable by a user to move the switching member between a first switching position and a second switching position. The user interface may include, for example, one or more of a handle, a high-friction grip surface, a knob, a button, a toggle switch, or a touchscreen. This can help simplify the process for the user to move the switching member between the first and second switching positions. For example, the user interface may include a handle located on the switching member and movable by the user to move the switching member between the first and second switching positions.

[0022] When the switching member is in the first switching position and the second switching position, the switching mechanism can form a seal between the first air outlet and the second air outlet. This reduces air loss when air flows through the corresponding first or second outlet, thereby increasing the airflow velocity across the curved surface and thus improving the performance of the accessory.

[0023] The switching component can be elongated, with a length at least as long as that of the first and second air outlets. This reduces air loss as air flows through the corresponding first or second outlet, thereby increasing the airflow velocity across the curved surface and thus improving the performance of the accessory.

[0024] The switching component can extend substantially parallel to the central axis of the attachment. This allows a larger portion of the hair to be styled by the attachment at any given time.

[0025] The switching member may include a curved surface for directing airflow toward a first or second air outlet. That is, the switching member may be concave as the airflow is directed toward the first or second air outlet to flow over the curved surface to help align the airflow. The curved surface can help maintain a more laminar airflow.

[0026] Switching components can comprise a single body, such as a single integral part. This can provide a simpler arrangement than, for example, a corresponding arrangement where the switching component comprises multiple bodies, which can reduce the number of parts and cost, and can reduce the risk of failure during use.

[0027] The switching member can move about a pivot between a first switching position and a second switching position. This provides a simple and reliable way to move the switching member, avoiding the switching member getting stuck on other surfaces within the accessory during movement, which could happen in examples where the switching member slides between the first and second switching positions.

[0028] The first and second switching positions can be within a range of 18 to 30 degrees around the pivot. The invention of this application has determined that this pivoting range is sufficient to switch airflow between the first and second air outlets while maintaining airflow over the curved surface.

[0029] At least a portion of the retaining mechanism may be located within an internal part of the switching mechanism, closer to the central axis of the attachment than the pivot. This likely means that the retaining mechanism is contained within the attachment, making it inaccessible to the user and therefore tamper-proof.

[0030] The accessory may include ribs positioned such that they interact with airflow exiting a first or second air outlet to align the airflow. The ribs can split the airflow exiting the first or second air outlet in two to align it. By reducing flow separation of the airflow toward the first or second air outlet, the ribs can reduce noise generated by the airflow within the accessory. When the airflow is directed toward the first or second air outlet across a curved surface, the ribs can provide a more laminar airflow by smoothing it.

[0031] The rib can be connected to the switching member such that the position of the rib relative to the first and second air outlets varies depending on whether the switching member is in the first or second switching position. This helps the rib provide optimized airflow straightness based on the position of the switching member, allowing the airflow to be smoothed by the rib regardless of which direction the airflow is directed around the curved surface.

[0032] Ribs can be rigidly attached to the switching component. This can help simplify manufacturing and ensure the correct positioning of the ribs in the airflow.

[0033] The accessory may include a guide, comprising a first channel defining a first air outlet and a second channel defining a second air outlet. The first and second channels may include curved surfaces to guide airflow across the curved surfaces. This helps reduce airflow separation to maintain a more laminar airflow.

[0034] The guide member can be configured such that when the switching member is in the first switching position, the second channel is blocked by the switching member, and when the switching member is in the second switching position, the first channel is blocked by the switching member. This can help ensure that, depending on the position of the switching member, airflow can exit only from the first or second air outlet to provide greater airflow in the desired direction on the curved surface.

[0035] The accessory may include first and second planes, respectively adjacent to and extending rearward from the first and second air outlets. The first and second planes may be included in the guide.

[0036] When a non-flat surface extending rearward from the first or second air outlet is provided, smoothness can be disrupted when the attachment moves relative to the hair during use, which is typically the case during styling operations. When a rough surface (e.g., a surface including protrusions such as bristles) is provided to extend rearward from the first or second air outlet, this rough surface may disrupt hair that has been smoothed by airflow from the first or second air outlet when the attachment moves relative to the hair during use. By providing a curved surface adjacent to and downstream of the first or second air outlet, and a flat surface adjacent to and extending rearward from the first or second air outlet, a smooth hair surface can be formed and maintained when the user moves the attachment relative to the hair during use.

[0037] This flat surface can also be used as a guide surface to ensure that the accessory is correctly positioned relative to the user's head, so that the airflow leaving the first or second air outlet can provide the aforementioned functions.

[0038] A flat surface can be substantially smooth and continuous in form. A flat surface can range in height from 5 mm to 20 mm.

[0039] The attachment can be configured such that when the attachment moves relative to the hair during use, for example when the attachment moves linearly along the hair from root to tip during use, the flat surface contacts the hair extending backward from the first or second air outlet.

[0040] A flat surface can include a generally planar surface. This can help maintain a smooth hair surface when the attachment moves relative to the hair during use and can ensure that the hair extending backward from the first or second air outlet is supported by the surface.

[0041] The flat surface may be inclined relative to the plane of the first or second air outlet. This ensures that hair extending backward from the first or second air outlet contacts the flat surface, while during use, hair downstream of the first or second air outlet is drawn towards the curved surface. The flat surface may be inclined relative to a plane tangent to the curved surface at a point immediately adjacent to the first or second air outlet.

[0042] The accessory may include a body defining a main air outlet for guiding airflow from an air inlet to first and second air outlets. When the switching member is in a first switching position, the airflow is guided by the switching member from the main air outlet to the first air outlet. When the switching member is in a second switching position, the airflow is guided by the switching member from the main air outlet to the second air outlet.

[0043] The main body can be rotated by the user between a first position and a second position relative to the first and second air outlets. In the first position, airflow leaving the main air outlet is guided to either the first or second air outlet by a switching component; in the second position, airflow leaving the main air outlet is not guided by the switching component. This allows the accessories to operate in different modes depending on the position of the main body. For example, when the main body is in the first position, the accessories can be used for hair styling; when the main body is in the second position, the accessories can be used for hair drying.

[0044] The switching component can be rotated by the user between a first position and a second position relative to the first and second air outlets. In the first position, the airflow leaving the main air outlet is guided by the switching component to the first or second air outlet. In the second position, the airflow leaving the main air outlet is not guided by the switching component.

[0045] The first and second positions can be 180 degrees apart. When the main body rotates between the first and second positions, this helps with weight distribution within the accessory, thereby increasing ease of operation for the user. It also allows the user to easily determine the mode in which the accessory is operating.

[0046] The accessory may include a spring plunger attached to the body for positioning the body in first and second positions. This can provide feedback to the user to confirm that the body is in the first or second position. The accessory may also include a pair of ramps arranged to engage with the spring plunger for limiting the range of motion of the spring plunger.

[0047] The main body is typically cylindrical. This helps the main body rotate smoothly between the first and second positions. The main body can be configured to guide airflow away from the main air outlet in a radial direction. That is, the main body is constructed such that the airflow exits the main air outlet in a direction perpendicular to the outer surface of the main body, within which the main air outlet is confined. This facilitates the use of accessories when drying hair with the main body in the second position.

[0048] When the airflow changes from the radial direction at the main air outlet to the tangential direction at the first and second outlets, the arcuate surfaces, ribs, and arcuate surfaces of the switching components and the first and second channels can help provide a more laminar airflow by smoothing the airflow.

[0049] The main air outlet can have a larger opening cross-sectional area than the first and second air outlets. For the same airflow velocity, this allows for a greater air velocity through the first or second channel compared to the main air outlet, which is advantageous for hair styling when the body is in the first position. Directing airflow from the larger opening cross-sectional area at the air outlet to the smaller opening cross-sectional areas at the first and second air outlets can create converging airflow at the first and second air outlets, which can reduce noise and improve hair straightening performance.

[0050] The curved surface may include the outer surface of the body. This allows for a simpler accessory structure compared to a case where the body and the curved surface are separate. The curved surface may include a single curved surface extending substantially around the entire body from a first side to a second side of the main air outlet. This allows for smoother rotation of the body relative to the first and second outlets.

[0051] The curved surface may include first and second curved surfaces located on opposite sides of the main air outlet. When the body is in the first position, the first air outlet is used to guide airflow from the main air outlet across the first curved surface in a first direction, and the second air outlet is used to guide airflow from the main air outlet across the second curved surface in the opposite second direction.

[0052] The first and second curved surfaces may extend away from the respective sides of the main air outlet such that they are adjacent on the side of the body opposite to the main air outlet to provide a continuous surface extending from the first side of the main air outlet to the second side of the main air outlet.

[0053] The first and second curved surfaces can form different regions of the curved surface. For example, when the body is generally cylindrical, the curved surface can include substantially the entire circumferential surface of the body, the first curved surface can include a curved surface region adjacent to a first side of the main outlet, and the second curved surface can include a curved surface region adjacent to a second side opposite to the main outlet. This can provide the benefit that the body requires a single air outlet, while the accessory provides the ability to direct air across the curved surface in opposite directions to style hair on different sides of the head.

[0054] The accessory may include a pair of guide walls for guiding airflow along a curved surface, the pair of guide walls being upright from the curved surface. By providing a pair of guide walls extending outward from the curved surface, ambient air can be prevented from impacting the negative pressure zone created by the airflow flowing along the curved surface during use, and the attraction of hair toward the curved surface can be increased compared to a similar arrangement, for example, without the use of guide walls.

[0055] Each guide wall may be curved in form, for example, having a curvature that follows the curvature of a curved surface. The guide walls of the pair may be opposite each other, for example, such that a channel is defined between them, with the curved surface forming the bed of the channel. The pair of guide walls may be spaced apart from each other along the curved surface, for example, at opposite edges of the curved surface. The spacing between the guide walls may substantially correspond to the lengths of the first and second air outlets or the length of the main air outlet of the body. The curved surface between the pair of guide walls may be substantially smooth and uninterrupted. This allows hair to wrap around the curved surface between the pair of guide walls during use.

[0056] The guide walls can protrude outward from the curved surface, for example, the guide walls and the curved surface can be integrally formed as a single component. The height of this pair of guide walls can be substantially equal to the height of the first and second air outlets. This ensures that a negative pressure zone is maintained along substantially the entire height of the air jet exiting the first and second air outlets during use.

[0057] The pair of guide walls include a height substantially equal to that of the first and second air outlets in the region adjacent to the respective first or second air outlet. The inventors of this application have discovered that maintaining a negative pressure zone in the region adjacent to the air outlet is beneficial for generating airflow along the curved surface, which generates a first force sufficient to attract relatively long hair toward the first surface, while also generating a second force to push relatively short hair away from the curved surface.

[0058] The radius of curvature of the pair of guide walls can be greater than the radius of curvature of the curved surface. For example, the radius of curvature of the pair of guide walls can be greater than the radius of curvature of the curved surface in the region adjacent to the respective first or second air outlet. This ensures that the pair of guide walls provide their function in the region adjacent to the respective first or second air outlet during use.

[0059] The pair of guide walls may include a height that varies along the length of the guide walls. The inventors of this application have discovered that guide walls provide the greatest influence in certain areas of a curved surface, such as in the region adjacent to an air outlet. The pair of guide walls may include a height that decreases in the direction away from the respective first or second air outlet. By decreasing the height of the guide walls in the direction away from the respective first or second air outlet, less material is required to form the guide walls compared to, for example, a guide wall of constant height. The pair of guide walls may include a height that gradually decreases in the direction away from the respective first or second air outlet, for example, so that there is no step change in height. Each guide wall in the pair may include the same height and may be substantially symmetrical about an axis bisecting the space between the guide walls.

[0060] The pair of guide walls can include a constant height. This provides determinism, meaning that the negative pressure zone generated near the curved surface is not affected along the length of the curved surface.

[0061] The guide walls can extend from the first air outlet to the second air outlet around the body. The body can be configured to rotate within the pair of guide walls. This can help stabilize the body relative to the guides to ensure smooth movement of the body between the first and second positions.

[0062] The first and second air outlets can be fixed air outlets, such as those with a fixed cross-sectional area, length, and / or width. This ensures that for a given airflow rate generated by the airflow generator, the airflow characteristics of the attachment are constant, thereby ensuring that airflow is generated along the curved surface, producing a first force that attracts the hair to the curved surface and a second force that pushes the hair away from the curved surface. This ensures a constant airflow along the length of the air outlets, allowing the attachment to straighten the hair more effectively. Compared to attachments with variable air outlets, this also provides a simpler attachment with fewer moving parts, thus reducing the risk of failure.

[0063] The curved surface may include a continuous surface extending between the first and second air outlets. When the attachment is used in multiple orientations, this continuous surface can help draw hair to the curved surface.

[0064] The main body may include an internal baffle for redirecting airflow from the airflow generator to the main air outlet, for example, redirecting the airflow to the main air outlet at approximately 90 degrees. This allows the main portion of the accessory housing the airflow generator to extend orthogonally relative to the main air outlet, which provides greater design flexibility and better ergonomics than, for example, an accessory where the air outlet is aligned with the main portion of the accessory housing the airflow generator.

[0065] Accessories may include a heater for heating the airflow. This can provide increased design flexibility and, for example, enable the airflow to provide a drying function.

[0066] The accessory may include an alert module configured to warn the user that the switching component is in a first switching position and / or a second switching position. This allows the user to know which mode the accessory is operating in. For example, the alert module may provide a first marker to indicate when the switching component is in the first switching position, and a different second marker when the switching component is in the second switching position. The alert module may include at least one of a haptic feedback module, a visual marker, and an auditory marker. This ensures that the user is alerted regardless of whether the accessory is visible to the user.

[0067] According to a second aspect of the invention, a hair care appliance is provided, comprising an air inlet, a curved surface, and first and second air outlets, the curved surface being adjacent to and downstream of the first and second air outlets, the first and second air outlets being used to guide airflow across the curved surface in opposite directions; an airflow generator for generating airflow from the air inlet to the first and second air outlets; a switching member for switching airflow between the first and second air outlets, the switching member being movable from a first switching position to a second switching position, in the first switching position, the airflow crossing the curved surface through the first air outlet without crossing the second air outlet, and in the second switching position, the airflow crossing the curved surface through the second air outlet without crossing the first air outlet; and a retaining mechanism for holding the switching member in one of the first and second switching positions when no force is applied to the switching member by a user of the hair care appliance.

[0068] Hair styling appliances may include heaters for heating airflow. This can provide increased styling flexibility and, for example, allow the airflow to provide a drying function. The heaters can be configured to operate at a specific temperature depending on whether the body is in a first or second position.

[0069] The hair care appliance may include a handle unit and an accessory according to a first aspect of the invention, wherein an airflow generator is housed within the handle unit and the accessory is detachably attached to the handle unit. Providing a removable accessory allows the user to selectively access the functionality of the accessory described herein.

[0070] According to a third aspect of the invention, an accessory for a hair care device is provided, the accessory comprising an air inlet, a curved surface, a first air outlet, the curved surface being adjacent to and downstream of the first air outlet; a switching member for switching airflow from a first switching position to a second switching position, wherein in the first switching position the airflow passes through the first air outlet along the curved surface in a first direction, and in the second switching position the airflow passes through the first air outlet along the curved surface in a second direction; and a retaining mechanism for retaining the switching member in one of the first and second switching positions without applying force to the switching member.

[0071] Switching components may include curved surfaces.

[0072] A second air outlet can be provided, and the switching member switches the airflow from a first switching position to a second switching position. In the first switching position, the airflow passes through the first air outlet in a first direction, and in the second switching position, the airflow passes through the second air outlet in a second direction.

[0073] Where appropriate, optional features of an aspect of the invention may be equally applied to other aspects of the invention. Attached Figure Description

[0074] Figure 1 This is a schematic diagram illustrating a hair care device according to the present invention;

[0075] Figure 2 Is it through Figure 1 A schematic cross-sectional view of the handle unit of a hair care device;

[0076] Figure 3 It is used for Figure 1 A schematic perspective view of an embodiment of an accessory for a hair care device, showing the accessory in a second mode;

[0077] Figure 4 yes Figure 3 A schematic cross-sectional view of the attachment, showing the attachment in the second mode;

[0078] Figure 5 yes Figure 3 A schematic perspective view of the attachments, showing the attachments in the first mode;

[0079] Figure 6 This is shown as being used in the first mode by [the method described above]. Figure 3 A schematic diagram of the forces generated by the airflow in the accessory;

[0080] Figure 7 yes Figure 3 A schematic top view of the attachment, showing the attachment in the first mode and the first switching position;

[0081] Figure 8 yes Figure 3 A schematic top view of the attachment, showing the attachment in the first mode and the second switching position;

[0082] Figure 9 yes Figure 3 A schematic exploded view of the appendix;

[0083] Figure 10a This is a side view of another attachment;

[0084] Figure 10b yes Figure 10a A schematic cross-sectional view of the attachment;

[0085] Figure 10c yes Figure 10a A schematic perspective view of the attachment;

[0086] Figure 11a This is a schematic perspective view of Annex III;

[0087] Figure 11b yes Figure 11a A schematic perspective view of the attachment;

[0088] Figure 12aThis is a schematic sectional view of Annex IV;

[0089] Figure 12b yes Figure 12a A schematic cross-sectional view of the attachment, showing the attachment in the first switching position;

[0090] Figure 12c yes Figure 12a A schematic top view of the attachment, showing the attachment in the second switching position;

[0091] Figure 13a This is a schematic cross-sectional view of the fifth attachment, showing the attachment in the first switching position;

[0092] Figure 13b yes Figure 13a A schematic cross-sectional view of the attachment, showing the attachment in the second switching position;

[0093] Figure 14a It is a schematic perspective view of Annex VI; and

[0094] Figure 14b yes Figure 14a A schematic cross-sectional view of the appendix. Detailed Implementation

[0095] exist Figure 1 The image schematically illustrates a hair care device according to the invention, typically designated 10.

[0096] The hair care device 10 includes a handle unit 12 and an accessory 100 detachably attached to the handle unit 12.

[0097] like Figure 2 As shown, the handle unit 12 includes a housing 14, an airflow generator 16, a heater 18, and a control unit 20.

[0098] The housing 14 is tubular and includes an air inlet 22 and an air outlet 24. Airflow is drawn into the housing 14 through the air inlet 22 by the airflow generator 16 and exits the housing 14 through the air outlet 24. The airflow generator 16 is housed within the housing 14 and includes an impeller 26 driven by a motor 28. The airflow generator is configured to generate airflow at a flow rate in the range of 8-18 L / s, for example, 10-16 L / s. A Dyson V9 digital motor manufactured by Dyson Technology, Inc. is a suitable airflow generator. A heater 18 is also housed within the housing 14 and includes a heating element 30 to optionally heat the airflow.

[0099] The control unit 20 includes electronic circuitry for a user interface 32 and a control module 34. The user interface 32 is located on the outer surface of the housing 14 and is used to turn the hair care appliance 10 on and off, select the flow rate (e.g., high, medium, and low), and select the airflow temperature (e.g., hot, medium, or cold). Figure 1 In the example, the user interface includes multiple sliding switches, but other forms of user interface 32 can also be envisioned, such as buttons, dial pads, or touchscreens.

[0100] The control module 34 is responsible for controlling the airflow generator 16 and the heater 18 in response to input from the user interface 32. For example, in response to input from the user interface 32, the control module 34 can control the power or speed of the airflow generator 16 to regulate the airflow rate, and control the power of the heater 18 to regulate the airflow temperature.

[0101] Annex 100 schematically shows in Figure 3-5 and 7-9.

[0102] Attachment 100 includes a body 102, which includes an air inlet 108, an air outlet 110, a curved surface 104, and a plurality of internal baffles 114. The attachment includes a guide 120 that, when aligned with the air outlet 110 of the body 102, guides airflow from the air outlet 110 across the curved surface 104 of the body, such that the airflow guided by the guide 120 generates a first force attracting hair towards the curved surface 104 and a second force pushing hair away from the curved surface 104.

[0103] Air inlet 108 includes a generally circular opening formed in body 102, and air inlet 108 is configured to receive airflow from air outlet 24 of handle unit 12 when accessory 100 is attached to handle unit 12 in use. The periphery of air inlet 108 includes attachment features for releasably attaching accessory 100 to handle unit 12. Attachment features may take many forms and are not relevant to this invention, and therefore will not be described further for brevity.

[0104] Air outlet 110 includes a generally rectangular groove formed longitudinally along the curved surface 104 of body 102. Air outlet 110 includes a series of baffles extending across its width. The baffles help straighten the airflow exiting air outlet 110 and help prevent hair from accidentally entering air outlet 110.

[0105] A schematic cross-sectional view of the curved surface 104 is shown in Figure 4The body 102 is generally cylindrical, and the curved surface 104 is the circumferential surface of the body 102. Therefore, the curved surface 104 is located near and downstream of the air outlet 110. It should be understood that in other embodiments, the body 102 may not be generally cylindrical and the curved surface 104 may extend only partially around the body 102.

[0106] The main body 102 is configured to guide the airflow leaving the air outlet 110 radially. The guide 120 is arranged to redirect the airflow leaving the air outlet 110 from the radial direction to the tangential direction of the curved surface 104 in the region adjacent to and downstream of the air outlet 110.

[0107] The curved surface 104 is substantially smooth and formally uninterrupted, so that no protrusions, recesses, or holes are formed thereon. This enhances the functionality of the accessory 100, which will be described below. The radius of curvature of the curved surface 104 is in the range of 10 mm to 60 mm, for example, in the range of 15 mm to 40 mm. In the presently preferred embodiment, the curved surface 104 has a radius of curvature of approximately 20 mm. The inventors of this application have discovered that this geometry of the curved surface 104 can provide advantageous effects, as will be described below.

[0108] Multiple internal baffles 114 are curved and extend in the direction from air inlet 108 to air outlet 110. The internal baffles 114 are configured to deflect airflow from air inlet 108 toward air outlet 110, such that the airflow is deflected approximately 90 degrees from air inlet 108 to air outlet 110. This allows the handle unit 12 to extend orthogonally relative to air outlet 110, which can provide greater design flexibility and better ergonomics than, for example, hair care appliances in which the air outlet is aligned with the handle unit of the hair care appliance.

[0109] The main body 102 can rotate relative to the guide member 120 between a first position and a second position about its central longitudinal axis 103. In the first position, the airflow leaving the air outlet 110 is guided by the guide member 120, such as... Figure 5 , 7 As shown in Figure 8, in the second position, the airflow leaving the air outlet 110 is not guided by the guide member 120, as... Figure 3 and 4 As shown. The airflow direction leaving air outlet 110 is from... Figure 4 , 7 Arrow 101 in 8 indicates that they show different operating configurations of Annex 100.

[0110] The position of the main body 102 relative to the guide member 120 determines the operating mode of the hair care device 100. In this embodiment, when the main body 102 is in the first position, such as... Figure 5 , 7 As shown in Figure 8, the hair care device 100 is configured to operate in a first styling mode, and airflow is guided by the guide 120 across the curved surface 104. When the body 102 is in the second position, as... Figure 3 and 4 As shown, the hair care appliance 100 is configured to operate in a second drying mode, and the airflow is directed toward the user's hair and exits through the air outlet 110.

[0111] The first position and the second position of the body 102 are spaced 180 degrees apart. That is, the body 102 rotates 180 degrees relative to the guide 120 to move between the first position and the second position. In other embodiments, the first and second positions may be spaced less than 180 degrees apart from each other.

[0112] Attachment 100 includes a handle 112 projecting from the distal end of the body 102. The distal end is the end of the body 102 opposite to the air inlet 108. The handle 112 is rigidly attached to the body and can be rotated by a user to rotate the body 102 relative to the guide 120 between a first position and a second position. It should be understood that the handle 112 can be provided in any suitable form for user operation to rotate the body 102 relative to the guide 120, such as a toggle switch, button, or touchscreen. The handle 112 is contained in a cooling tip that is relatively insulated from the heat of the airflow within the attachment.

[0113] like Figure 5 , 7 As shown in Figure 8, when the body 102 is in the first position, the guide 120 is arranged to deflect airflow leaving the air outlet 110 to the curved surface 104. The inventors of this application have discovered that the airflow adheres to the curved surface 102 via the Coanda effect. (Reference) Figure 6 The diagram illustrates the interaction of forces. When a bundle of hair is brought near attachment 100, the longer hairs are attracted to the curved surface 102 by force F_PULL due to the negative pressure zone created by the airflow on the curved surface 102, and at least partially wrapped around it. However, the pressure gradient of the hair bundle also generates force F_PUSH, which causes some airflow to pass directly through the hair bundle. Due to the position of this force relative to the curved surface 102 and the rest of the hair bundle, the shorter hair is loosely held only at that point compared to the longer hair that remains in place on the curved surface 102. The shorter hair is blown towards the user's head through the hair bundle, while the longer hair remains in place on the outside of the hair bundle, i.e., the portion of the hair bundle facing away from the user's head. This provides smoothness to the hair after the hair interacts with the hair care device 10.

[0114] This effect can be optimized by appropriately modifying the geometry and parameters described herein. One such parameter that can provide increased effectiveness is the airflow velocity at the air outlet 110 of the annex 100. In particular, too high a velocity may cause shorter hairs to stick to the curved surface 102 and thus not be pushed away by longer hairs, while too low a velocity may not be sufficient to attract longer hairs to the curved surface 102 in the first place.

[0115] The guide 120 includes a first channel 122 defining a first air outlet 126, a second channel 124 defining a second air outlet 128, first and second flat surfaces 130, an inner shell 132 defining an aperture 133, a pair of guide walls 134, a switching member 140, and a retaining mechanism 150, as will be described in more detail below. It should be understood that in other embodiments, some of these features may be omitted.

[0116] The inner shell 132 contacts the curved surface 104 at least when the body 102 is in the first position. The inner shell 132 defines an aperture 133 corresponding to the air outlet 110 to allow airflow from the air outlet 110 to the first channel 122 and the second channel 124. The inner shell 132 includes ridges on opposite sides of the aperture 133, the ridges defining convex curved surfaces for guiding airflow radially to the curved surface 104 of the body 102, thereby providing a smoother flow path for the airflow and thus helping to reduce turbulence in the airflow.

[0117] The first channel 122 is arranged to guide airflow across the curved surface 104 in a first direction. Regarding Figure 7 This is in a counter-clockwise direction, as indicated by arrow 101. The second channel 124 is arranged to guide airflow across the curved surface 104 in the second direction. Regarding... Figure 8 This is in a clockwise direction, as shown by arrow 101.

[0118] When the body 102 is in the first position, the curved surface 104 includes a continuous surface extending between the first and second air outlets 126, 128.

[0119] The first and second air outlets 126, 128 comprise rectangular slots extending substantially parallel to the longitudinal axis 103 of the body. The first and second air outlets 126, 128 are substantially equal in size and shape. The first and second air outlets 126, 128 have the same opening cross-sectional area, which is smaller than the opening cross-sectional area of ​​air outlet 110. For the same airflow velocity, this provides an increase in airflow velocity at the first and second air outlets 126, 128 compared to the airflow velocity at air outlet 110, and provides a converging airflow at the first and second air outlets 126, 128.

[0120] Air outlet 110 and the first and second air outlets 126 and 128 are fixed air outlets, each with a fixed cross-sectional area, length and width.

[0121] The first and second air outlets 126 and 128 each have a length in the range of 50 mm to 150 mm, for example, in the range of 75 mm to 85 mm, and a height in the range of 2 mm to 5 mm, for example, in the range of 3.0 mm to 4.5 mm. This gives each of the first and second air outlets 126 and 128 a height of 140 mm. 2 Up to 450mm 2 Within that area, for example, at 225.0 mm 2 up to 382.5mm 2 The total open cross-sectional area within the range.

[0122] In the currently preferred embodiment, the widths of the first and second air outlets 126 and 128 are approximately 77 mm, and the heights of the first and second air outlets 126 and 128 are approximately 4.5 mm. The cross-sectional area of ​​the openings of the first and second air outlets 126 and 128 is 346.5 mm². 2 The inventors of this application have discovered that such dimensions of the first and second air outlets 126, 128 can provide advantageous effects, as will be described below.

[0123] The applicant has determined that a velocity in the range of 30 m / s to 65 m / s at the first or second air outlet 126, 128 can particularly effectively generate an airflow along the curved surface 102, which generates a first force sufficient to attract relatively long hair towards the curved surface 102, while also generating a second force to push relatively short hair away from the curved surface 102. In the currently preferred embodiment, the airflow velocity at the first or second air outlet 126, 128 is approximately 55 m / s.

[0124] Another parameter that can enhance the effectiveness of smoothing hair in the manner described above is the ratio of the airflow velocity at the first or second air outlet 126, 128 to the airflow velocity generated by the airflow generator 16. Figure 5 , 7 In embodiments 8, the ratio is in the range of 2.14 to 5.63, and in a particularly preferred embodiment, the ratio is around 2.89. The applicant has found that such a ratio may be particularly effective in generating an airflow along the curved surface 102 that generates a first force sufficient to attract relatively long hair toward the curved surface 102, while also generating a second force to push relatively short hair away from the curved surface 102.

[0125] Another parameter that can enhance the effectiveness of smoothing hair in the manner described above is the ratio of the airflow velocity generated by the airflow generator 16 to the cross-sectional area of ​​the opening of the first or second air outlet 126, 128. Figure 5 , 7 In embodiments 8, the ratio is in the range of 0.01 to 0.10, and in a particularly preferred embodiment, the ratio is around 0.04. The applicant has found that such a ratio may be particularly effective in generating an airflow along the curved surface 102 that generates a first force sufficient to attract relatively long hair toward the curved surface 102, while also generating a second force to push relatively short hair away from the curved surface 102.

[0126] Another parameter that can enhance the effectiveness of straightening hair in the manner described above is the ratio of the radius of curvature of the curved surface 102 to the airflow velocity at the first or second air outlets 126, 128. Figure 5 , 7 In embodiments 8, the ratio is in the range of 0.33 to 2.00, and in a particularly preferred embodiment, the ratio is around 0.57. The applicant has found that such a ratio may be particularly effective in generating an airflow along the curved surface 102 that generates a first force sufficient to attract relatively long hair toward the curved surface 102, while also generating a second force to push relatively short hair away from the curved surface 102.

[0127] A flat surface 130 is located near and extends rearward from the first and second air outlets 126, 128, such that the flat surface 130 extends rearward from the edges of the first and second air outlets 126, 128. The flat surface 130 is inclined relative to the respective plane in which the first and second air outlets 126, 128 are disposed, for example, at an angle in the range of 3-10 degrees. The flat surface 130 is generally planar in form and is substantially smooth and uninterrupted, for example, without any protrusions, recesses or holes formed therein. The flat surface 130 has a height in the range of 5 mm to 20 mm. The function of the flat surface 130 will be described below. It should be understood that in embodiments where the guide 120 includes only one channel defining the channel outlets 126, 128, the guide includes a single flat surface 130 which is adjacent to and extends rearward from the channel outlets 126, 128.

[0128] The pair of guide walls 134 are used to guide airflow along the curved surface 104 and are disposed on opposite edges of the curved surface 104. The guide walls 134 are upright from the curved surface 104. The guide walls 134 extend along the entire arc length of the curved surface 104. In this embodiment, the guide walls 134 extend around the body 102 to form a pair of loops in which the body 102 rotates. That is, the guide walls 134 extend from the body 102 from the first air outlet 126 to the second air outlet 128. The guide walls 134 have a height substantially corresponding to the height of the first and second air outlets 126, 128, and have a constant height along their length.

[0129] As described above, a pair of guide walls 134 extend along the opposite edges of the curved surface 104. This effectively creates an airflow channel, wherein the pair of guide walls 134 act as the walls of the channel, and the curved surface 104 acts as the bed of the channel. In use, the guide walls 134 suppress the interaction between ambient air and the airflow flowing along the curved surface 104, which can maintain the negative pressure zone generated by the airflow flowing along the curved surface 104.

[0130] Annex 100 includes a switching member 140 for switching airflow between first and second air outlets 126, 128. The switching member 140 can be switched from a first switching position (e.g., ... Figure 7 (As shown) Move to the second switching position (e.g.) Figure 8 (As shown). In the first switching position, when the body 102 is in the first position, the airflow passes through the first air outlet 126, crosses the curved surface 104, and does not pass through the second air outlet 128. In the second switching position, when the body 102 is in the first position, the airflow passes through the second air outlet 128, crosses the curved surface 104, and does not pass through the first air outlet 126.

[0131] The switching member 140 is arranged to form a seal between the first air outlet 126 and the second air outlet 128 when the switching member 140 is in the first switching position and the second switching position, thereby blocking the first or second channel 122, 124. In this embodiment, the edge of the switching member 140 is arranged to contact the inner shell 132 of the guide 130 to block airflow toward the respective first or second channel 122, 124 and allow airflow to pass through the other of the first or second channel 122, 124.

[0132] The switching member 140 is elongated, with a length at least as long as that of the air outlet 110. The switching member 140 is at least as long as that of the first and second air outlets 126, 128. The switching member 140 extends substantially parallel to the longitudinal axis 103 of the body 102.

[0133] The switching member 140 includes an arcuate or curved surface 146 for directing airflow to the first or second air outlet 126, 128. The switching member 140 thus forms a concave surface for guiding airflow from the radial direction of the body 102 to the tangential direction of the curved surface 104.

[0134] Annex 100 includes a handle 142 positioned on the switching member 140. A user can move the handle 142 to move the switching member 140 between a first switching position and a second switching position. The switching member 140 and the handle 142 are integrally formed. It should be understood that any other suitable user interface can be used to move the switching member 140 between the first and second switching positions.

[0135] The switching member 140 is movable about a pivot 144 between first and second switching positions, such that the switching member 140 rotates about the pivot 144. The switching member 140 rotates about the pivot 144 by an angle ranging from 18 to 30 degrees to move between the first and second switching positions, for example, between 22 and 26 degrees. A handle 142 is located on the outer portion of the switching member 142, which is further away from the longitudinal axis 103 of the body 102 than the pivot 144. Therefore, the handle is more easily accessible to the user. It should be understood that in other embodiments, the switching member 140 can move between the first and second switching positions in any suitable manner, such as sliding the switching member 140 relative to the air outlet 110.

[0136] Annex 100 includes a holding mechanism 150. The holding mechanism is used to hold the switching member 140 in one of a first and second switching positions when the user of the hair care appliance 10 does not apply force to the handle 142 of the switching member 140. The holding mechanism 150 is arranged to hold the switching member 140 in the other switching position when the user of the hair care appliance 10 applies force to the handle 142 of the switching member 140. (Reference) Figure 7 and 8 The holding mechanism 150 will hold the switching component 140 in place. Figure 7 The first switching position is shown until the user applies force to the handle 142 (indicated by arrow 152). Upon application of force 152, the switching member 140 is released from the first switching position and moves to... Figure 8 The second switching position is shown, in which it is held by the holding mechanism 150 until the user applies force to the handle 142.

[0137] The holding mechanism 150 includes a first pair of magnetic elements 154 configured to hold the switching member 140 in a first switching position and a second pair of magnetic elements 156 configured to hold the switching member 140 in a second switching position. The first magnetic element in each pair of magnetic elements 154, 156 is located inside a respective flat surface 130, and the second magnetic element in each pair of magnetic elements 154, 156 is located on the switching member 140 opposite to the first magnetic element in the corresponding pair of magnetic elements 154, 156. In this example, the first magnetic element in each pair of magnetic elements 154, 156 comprises a metal sheet, and the second magnetic element in each pair of magnetic elements 154, 156 comprises a magnet arranged to attract the metal sheet. It should be understood that the holding mechanism may include other holding forms, such as releasable mechanical fasteners and biasing elements.

[0138] The second magnetic element in each pair of magnetic elements 154, 156 is located in the inner portion of the switching mechanism 140, which is closer to the longitudinal axis 103 of the body 102 than the pivot. This prevents the user from accessing the magnetic elements and thus tampering with them.

[0139] The minimum force 152 required to overcome the holding mechanism 150 to move the switching member 140 between the first switching position and the second switching position is up to about 5 N, more specifically in the range of 0.3 N to 3 N.

[0140] Annex 100 includes a rib 148, which in this embodiment is connected to the switching member 140. The rib 148 is positioned to interact with the airflow exiting the air outlet 110 to straighten the airflow exiting the air outlet 110, thereby providing a more laminar flow at the respective first and second air outlets 126, 128. The rib 148 is positioned relative to the first and second channels 122, 124 to smooth the airflow in the first and second channels 122, 124 and thus provide a more laminar airflow at the first and second outlets 126, 128 before the airflow passes over the curved surface.

[0141] Rib 148 interacts with the airflow exiting air outlet 110 to provide a straighter, smoother, and more laminar airflow at the first air outlet 126, which in turn provides a more cohesive airflow across the curved surface 104. When the airflow deflects, it typically separates, thus becoming more turbulent and noisy. Rib 148 has upper and lower surfaces along which the airflow flows as it passes through the first and second channels 122, 124. This helps reduce flow separation compared to accessory 100 without rib 148, thereby reducing turbulence and noise.

[0142] Rib 148 is movable relative to air outlet 110 by being connected to switching member 140. Thus, rib 148 can be moved relative to air outlet 110 by a user applying force to handle 142 to move switching member 140 between first and second switching positions and thus move rib 148.

[0143] Rib 148 is elongated and its length is at least as long as that of air outlet 110, such that rib 148 interacts with air over substantially the entire length of air outlet 110.

[0144] Rib 148 includes a generally smooth edge to reduce turbulence in the first and second channels 122, 124.

[0145] Rib 148 is connected to member 149 ( Figure 9 (Best shown in the diagram) It remains separated from the curved surface 146 of the switching member 140 to allow airflow to pass over both sides of the rib 148. When the body 102 is in the first position, the airflow leaving the air outlet 110 is split in two by the rib 148 and passes between adjacent connecting members 149.

[0146] Connecting members 149 are spaced apart along the length of rib 148. Connecting members 149 rigidly connect rib 148 to switching member 140 such that rib 148 is immovable relative to switching member 140. It should be understood that in other embodiments, rib 148 may be movable relative to switching member 140.

[0147] Rib 148 and connecting member 149 are integrated.

[0148] The hair care appliance 10 includes an alarm module 36. The alarm module is arranged to alert the user that the main body 102 is in a first or second position and / or to alert the user that the switching member 140 is in a first or second switching position. The alarm module 36 includes one or more of a haptic feedback module, an auditory marker, or a visual marker. In this embodiment, the alarm module 36 is shown in the handle unit 12; however, it should be understood that in other embodiments, the alarm module 36 may be included in the accessory 100. The hair care appliance 10 may include separate alarm modules 36 for the main body 102 and the switching member 140.

[0149] In use, accessory 100 is attached to handle unit 12. Airflow generator 16 generates airflow from air inlet 22 of handle unit 12 to air outlet 24 of handle unit 12, such that the airflow flows from air outlet 24 of handle unit to air inlet 108 of accessory 100. The airflow flows from air inlet 108 of accessory 100 through body 102 and is deflected by a plurality of internal baffles 114 to air outlet 110 of accessory 100. If body 102 is in a first position, the airflow leaves body 102 via air outlet 110 and passes over curved surface 102, or if body 102 is in a second position, the airflow flows radially along body 102.

[0150] In use, the body 102 is rigidly held in place relative to the handle unit 12, and the guide 120 is rotatable relative to the handle unit 12 to move the body 102 between a first position and a second position. It should be understood that in other embodiments, the guide 120 may be rigidly positioned relative to the handle unit 12, and the body 102 may be rotatable relative to the handle 12 and the guide 120 between a first position and a second position.

[0151] In use, when a user applies force to the handle 142, the switching member 140 can move between the first and second switching positions. This force can be applied by the user's hand or generated when the handle 142 comes into contact with the user's hair and / or head. The handle 142 is located at the rear edge of the flat surface 130, thus allowing it to contact the user's hair and / or head during use, as described in more detail below, to move the switching member between the first and second switching positions.

[0152] In use, the attachment 100 can move along the length of the hair, for example, in the direction from the root to the tip. A corresponding one of the flat surfaces 130 is positioned relative to the curved surface 104 such that the flat surface 130 contacts the hair extending rearward from the air outlet 110, while the hair downstream of the air outlet 110 contacts the curved surface 104. As previously described, the flat surface 130 is substantially smooth and uninterrupted in form, without any protrusions, recesses, or holes formed therein. When the hair care device 10 moves along the length of a strand of hair in use, the flat surface 130 passes through the hair that has already been smoothed by interacting with the curved surface 104. Given the smooth and uninterrupted nature of the flat surface 130, it does not disrupt the already smoothed hair, resulting in better smoothness than a corresponding hair care device, for example, having additional air outlets and / or bristles located behind the air outlet 110.

[0153] Now for reference Figures 10a to 14bAlternative arrangements will be discussed, and the same reference numerals will be used for the same features as those previously described in these figures. Annex 200 includes a body 102, which includes an air inlet 108, an air outlet 110, a curved surface 104, and a plurality of internal baffles 114. The annex includes a guide 220 that, when aligned with the air outlet 110 of the body 102, guides airflow from the air outlet 110 across the curved surface 104 of the body, such that the airflow guided by the guide 220 generates a first force that attracts hair toward the curved surface 104 and a second force that pushes hair away from the curved surface 104.

[0154] The main body 102 is configured to guide the airflow leaving the air outlet 110 in the radial direction. The guide 220 is arranged to redirect the airflow leaving the air outlet 110 from the radial direction to the tangential direction of the curved surface 104 in the region adjacent to and downstream of the air outlet 110.

[0155] The guide member 220 includes a first channel 122 defining a first air outlet 126 and a second channel 124 defining a second air outlet 128. Figures 10a to 10c In the guide 220, the guide member 220 also includes a switching member 140, wherein airflow is guided to a first air outlet 126 or a second air outlet 128 via a switching baffle 240, the switching baffle 240 extending from the inner surface of the guide member 220 to engage with one or the other side of the air outlet 110 of the body 102.

[0156] Guide member 220 can be flush with guide wall 134, or as Figure 10c As shown, the guide 220' can extend radially outward to provide more space to redirect air from the air outlet 110 to the curved surface 104.

[0157] The first channel 122 is arranged to guide airflow across the curved surface 104 in a first direction. This is clockwise, as indicated by arrow 101, according to Figure 10b. The second channel 124 is arranged to guide airflow across the curved surface 104 in a second direction.

[0158] The curved surface 104 includes a continuous surface extending between the first and second air outlets 126, 128.

[0159] Turn now Figure 11a and 11b It shows the relationship with Figure 10aSimilar to the third accessory 300, but the air outlet of the body 102 is divided into a first air outlet 110a and a second air outlet 110b. The guide 220 again includes a switching member 140, wherein airflow is directed to either the first air outlet 126 or the second air outlet 128. In this example, a switching baffle 240 extends from the inner surface of the guide 220 to engage one or the other side of a rib 202 disposed between the first air outlet 110a and the second air outlet 110b, thereby opening one of these outlets and blocking the other. In the figure shown, the second air outlet 110b is open, allowing air to flow from the first channel 122 to the first air outlet 126.

[0160] Figures 12a to 13b An alternative embodiment is shown, wherein accessory 250 includes a body 102, which includes an air inlet 108, an air outlet 110, and a plurality of internal baffles 114. The accessory includes a guide 240 that, when aligned with the air outlet 110 of the body 102, guides airflow from the air outlet 110 across a curved surface 204 of the guide, such that the airflow guided by the guide 240 generates a first force attracting hair towards the curved surface 204 and a second force pushing hair away from the curved surface 204.

[0161] In this embodiment, the guide member 240 includes a switching member and a curved surface 204. In this embodiment, the switching member 240 can be detached from the accessory 250.

[0162] The air outlet is divided into a first air outlet 110a and a second air outlet 110b, and the guide 240 is as follows: Figure 12b The first position shown and as Figure 12c The guide 240 moves between the first and second positions as shown. In the first position, the first air outlet 110a is open and the second air outlet 110b is blocked. In the second position, the second air outlet 110b is open and the first air outlet 110a is blocked. The guide 240 moves between the first and second positions by rotation. In this example, the rotation is about a point 242 located between the first air outlet 110a and the second air outlet 110b, and the guide 240 has a pear-shaped profile with the straight portion blocking the associated air outlet.

[0163] Pivot 242 conveniently provides a mounting position for guide 240, and this can include a magnetic connection between accessory 250 and guide 240, allowing guide to be removed and accessory 250 to be used for different functions; in this example, a coarse drying function.

[0164] A retaining mechanism may be provided to hold the switching member in one of a first and second switching positions without the user of the accessory applying force to the switching member. The retaining mechanism may include a first pair of magnetic elements configured to hold the switching member in the first switching position and a second pair of magnetic elements configured to hold the switching member in the second switching position, or a releasable mechanical fastener for holding the switching member in the first and second switching positions, or a biasing element for biasing the switching member to the first and second switching positions. Each of these mechanisms has been described in more detail above.

[0165] exist Figure 13a and 13b In this configuration, there is a single air outlet 110 and a guide 240 rotates about a pivot 244 to align the curved surface 206 with either a first side 212 or a second side 214 of the air outlet 110. As previously described, air adheres to the curved surface 206 as it exits the air outlet 110.

[0166] Figure 14a and 14b Annex 260 is shown, wherein the switching mechanism 270 is located within the body 104 rather than within the guide 262. The switching mechanism 270 is connected to a pivot 272, which ultimately connects to an externally accessible handle 274, which a user can turn to change the position of the switching mechanism 270. In the first position, the air outlet 110 is aligned with the first channel 122 to allow air to exit from the first air outlet 126 and subsequently surround the curved surface 204. In such a position... Figure 14b In the second position shown, air outlet 110 is aligned with second channel 124 so that air exits from second air outlet 128 and subsequently surrounds curved surface 204 in the opposite direction to the first air outlet.

[0167] Although described herein as an embodiment with releasable attachments, embodiments in which the hair care appliance is not comprised of a handle unit and attachments, but rather a single unit, for example, taking the form of a combined handle unit and attachments as previously described.

Claims

1. An accessory for a hair care device, the accessory comprising an air inlet, a curved surface, a first air outlet and a second air outlet, the curved surface being adjacent to and downstream of the first and second air outlets, the first and second air outlets being configured to direct airflow across the curved surface in opposite directions; a switching member for switching airflow between the first and second air outlets, the switching member being movable about a pivot between a first switching position and a second switching position, in the first switching position, airflow passing through the first air outlet across the curved surface without passing through the second air outlet, and in the second switching position, airflow passing through the second air outlet across the curved surface without passing through the first air outlet; and a retaining mechanism for holding the switching member in one of the first and second switching positions without a force being applied to the switching member by a user of the hair care device.

2. The accessory of claim 1, wherein, The airflow exiting the first and second air outlets generates a first force that attracts the hair toward the curved surface and a second force that pushes the hair away from the curved surface.

3. The accessory of claim 1, wherein, The retaining mechanism is arranged to hold the switching member in another position between the first and second switching positions when the user of the hair care device applies force to the switching member.

4. The accessory of any of the preceding claims, wherein, The holding mechanism includes a first pair of magnets configured to hold the switching member in a first switching position and a second pair of magnets configured to hold the switching member in a second switching position.

5. The accessory of any one of claims 1 to 3, wherein, The minimum force required to overcome the holding mechanism to move the switching member between the first switching position and the second switching position is up to about 5N.

6. The appendix according to any one of claims 1 to 3, comprising a user interface operable by a user to move the switching member between the first switching position and the second switching position.

7. The accessory of claim 6, wherein, The user interface includes a handle located on the switching member and movable by the user to move the switching member between a first switching position and a second switching position.

8. The accessory of any one of claims 1 to 3, wherein, The switching member is elongated and at least as long as the first and second air outlets.

9. The accessory of any one of claims 1 to 3, wherein, The switching component includes an arcuate surface for directing airflow to a first or second air outlet.

10. The accessory of any one of claims 1 to 3, wherein, When the switching member is in the first switching position and the second switching position, the switching member forms a seal between the first air outlet and the second air outlet.

11. The accessory according to any one of claims 1 to 3, comprising a rib positioned such that the rib interacts with an airflow exiting a first or second air outlet to align the airflow.

12. The accessory of claim 11, wherein, The rib is rigidly connected to the switching member such that the position of the rib relative to the first and second air outlets differs depending on whether the switching member is in the first switching position or the second switching position.

13. The accessory according to any one of claims 1 to 3, comprising a guide, the guide including a first channel defining the first air outlet and a second channel defining the second air outlet.

14. The accessory of any one of claims 1 to 3, comprising a main body defining a main air outlet for directing an airflow from an air inlet to the first and second air outlets, wherein, When the switching component is in the first switching position, the airflow is guided by the switching component from the main air outlet to the first air outlet. When the switching component is in the second switching position, the airflow is guided by the switching component from the main air outlet to the second air outlet.

15. The accessory of claim 14, wherein, The main body can be rotated by the user between a first position and a second position relative to the first and second air outlets. In the first position, the airflow leaving the main air outlet is guided to the first or second air outlet by the switching member. In the second position, the airflow leaving the main air outlet is not guided by the switching member.

16. The accessory of claim 14, wherein, The switching component can be rotated by the user between a first position and a second position relative to the first and second air outlets. In the first position, airflow leaving the main air outlet is guided by the switching component to the first or second air outlet. In the second position, airflow leaving the main air outlet is not guided by the switching component.

17. The accessory of claim 14, wherein, The curved surface is defined within the outer surface of the body.

18. The accessory of claim 17, wherein, The curved surface includes a first curved surface and a second curved surface located on opposite sides of the main air outlet. When the body is in the first position, the first air outlet is used to guide airflow from the main air outlet across the first curved surface in a first direction, and the second air outlet is used to guide airflow from the main air outlet across the second curved surface in the opposite second direction.

19. A haircare appliance comprising an air inlet, a curved surface, a first air outlet and a second air outlet, the curved surface being adjacent to and downstream of the first and second air outlets, the first and second air outlets being for directing a flow of air across the curved surface in respective opposite directions; An airflow generator is used to generate airflow from an air inlet to first and second air outlets; a switching member is used to switch the airflow between the first and second air outlets, the switching member being movable about a pivot between a first switching position and a second switching position, in the first switching position the airflow passes through the first air outlet across a curved surface without passing through the second air outlet, and in the second switching position the airflow passes through the second air outlet across a curved surface without passing through the first air outlet. And a retaining mechanism for holding the switching member in one of the first and second switching positions when the user of the hair care device does not apply force to the switching member.

20. The hair care appliance of claim 19, comprising a handle unit and an accessory, the airflow generator being housed within the handle unit, the accessory being releasably connected to the handle unit, the accessory comprising a first air outlet, a second air outlet, a curved surface, a switching member, and a holding mechanism.

21. An accessory for a hair care device, the accessory comprising an air inlet, a curved surface, and a first air outlet, the curved surface being adjacent to and downstream of the first air outlet; A switching member is used to switch airflow from a first switching position to a second switching position. The switching member is movable about a pivot between the first switching position and the second switching position. In the first switching position, airflow passes through a first air outlet and crosses a curved surface in a first direction. In the second switching position, airflow passes through the first air outlet and crosses a curved surface in a second direction. And a holding mechanism for holding the switching member in one of the first and second switching positions without applying force to the switching member.

22. The appendix according to claim 21, wherein, The switching component includes a curved surface.

23. The appendix according to claim 21 or 22, wherein, A second air outlet is provided, and the switching member switches the airflow from a first switching position to a second switching position. In the first switching position, the airflow passes through the first air outlet in a first direction, and in the second switching position, the airflow passes through the second air outlet in a second direction.

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