Haircare appliance

Abstract

An attachment for a haircare appliance, the attachment having a body comprising an air inlet and an air outlet. The attachment has a guide to direct airflow from the air outlet across a curved surface of the body, such that the airflow directed by the guide produces a first force to draw hair towards the curved surface and a second force to push hair away from the curved surface of the body. The body is rotatable relative to the guide between a first position in which the airflow from the air outlet is directed by the guide and a second position in which the airflow from the air outlet is not directed by the guide.

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 a body including an air inlet and an air outlet, and a guide for guiding airflow from the air outlet across a curved surface of the hair care device, such that the airflow guided by the guide generates a first force attracting hair toward the curved surface and a second force pushing hair away from the curved surface. The body is rotatable relative to the guide between a first position in which airflow leaving the air outlet is guided by the guide, and a second position in which airflow leaving the air outlet is not guided by the guide.

[0004] The appendix to the invention, based on the first aspect, may be advantageous because the inventors of this application have determined that guiding airflow across the curved surface of the body can create a negative pressure zone near the curved surface, which attracts longer hair towards 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 leaving the air outlet 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 accessory according to the first aspect of the invention may be advantageous because, depending on the position of the body and the form of airflow exiting the air outlet, the accessory can be used in two different modes. For example, when the body is in the first position, the accessory can be used for hair styling, and when the body is in the second position, the accessory can be used for hair drying.

[0007] The curved surface may include a Coanda surface, such as a convex surface, along which airflow adheres due to the Coanda effect in use.

[0008] The curved surface can be essentially smooth and continuous in form. This allows hair to wrap around the curved surface during use.

[0009] 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.

[0010] The airflow generator can be configured to produce airflow at a rate ranging from 8 L / s to 18 L / s. The applicant has found that such an airflow rate can generate airflow along a curved surface in a particularly effective manner, 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.

[0011] The main body can rotate between a first position and a second position about its longitudinal axis. The longitudinal axis of the main body can be the central axis of the main body, extending from the proximal end to the distal end. When the main body rotates between the first and second positions, this can help with weight distribution within the accessory, thereby increasing the ease of user operation.

[0012] 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.

[0013] 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.

[0014] The air outlet may include a longitudinal groove defined in the outer surface of the body. That is, the air outlet may have a length extending parallel to the longitudinal axis of the body and a width extending perpendicular to the longitudinal axis, with the length being greater than the width. This allows a larger area of ​​hair to be contacted by the airflow exiting the air outlet, thereby enabling styling with the attachment.

[0015] The air outlet can be a fixed air outlet, such as one with a fixed cross-sectional area, length, and / or width. This ensures that the airflow characteristics of the attachment are constant for a given airflow rate generated by the airflow generator, thereby ensuring airflow along the curved surface, resulting in a first force attracting the hair towards the curved surface and a second force pushing the hair away from the curved surface. This ensures a constant airflow along the length of the air outlet, allowing for a more neat and smooth hair finish with the attachment. Compared to attachments with variable air outlets, this also provides a simpler attachment with fewer moving parts, and therefore reduces the risk of failure.

[0016] The main body can typically be cylindrical. This helps facilitate smooth rotation of the main body between a first position and a second position. The main body can be configured to guide airflow away from the air outlet in a radial direction. That is, the main body is constructed such that the airflow exits the air outlet in a direction perpendicular to the outer surface of the main body defining the air outlet. This can contribute to the ease of use of the attachment when drying hair while the main body is in the second position.

[0017] The accessory may include a user interface that is operable by the user to rotate the body between a first and a second position relative to the guide. For example, the user interface may include one or more of a handle, a high-friction grip surface, a button, a toggle switch, or a touchscreen. This can help simplify the process of rotating the body between the first and second positions. The user interface may include a handle protruding from the distal end of the body. The handle may be rigidly attached to the body and can be rotated by the user to rotate the body between the first and second positions relative to the guide. The handle provides an easily accessible and user-friendly user interface that can be operated by the user. Positioning the handle at the distal end of the body ensures that the user's hand does not pass through potentially heated airflow exiting the air vent while rotating the body.

[0018] The guide may include an inner shell arranged to contact a curved surface of the body and including an aperture corresponding to an air outlet. When the body is in a first position, the aperture and air outlet are aligned to allow airflow through the air outlet and aperture. This helps reduce air loss as the airflow leaves the body and is guided by the guide.

[0019] The inner shell may include ridges positioned on both sides of the opening and thus on opposite sides of the air outlet when the body is in the first position. The ridges may extend along the length of the air outlet. The ridges can provide a smoother guiding surface for directing airflow from the air outlet to the curved surface. This may help reduce airflow separation to maintain a more laminar airflow.

[0020] The guide may include a first channel configured to guide airflow in a first direction around a curved surface of the body, and a second channel configured to guide airflow in the opposite second direction around the curved surface of the body. This allows the airflow to move away from the hair roots in a direction parallel to the direction of the user's hair, regardless of which side of the head the attachment is treating, thus providing better hair smoothing performance. This, in turn, allows the user to more comfortably use the attachment in different orientations to treat the hair on different sides of the head.

[0021] The first and second channels can define corresponding first and second air outlets downstream of the main body's air outlet. This allows airflow from a single air outlet defined in the main body to flow in opposite directions around the curved surface, depending on whether the airflow is through the first or second channel.

[0022] The first and second air outlets may each include a length ranging from 50 mm to 150 mm, for example, a length ranging from 75 mm to 85 mm. The first and second air outlets may include a width ranging from 2 mm to 5 mm, for example, from 3.0 mm to 4.5 mm. The first and second air outlets may be in a generally rectangular form, for example, such that the airflow exiting the main air outlet has a generally laminar flow pattern.

[0023] The first and second air outlets can be included in 140mm 2 Up to 450mm 2 Within the range, for example, in 280mm 2 Up to 350mm 2 The applicant has found that such an opening cross-sectional area may be particularly effective in generating airflow along a curved surface, which results in a first force attracting hair toward the curved surface and a second force pushing hair away from the curved surface.

[0024] The first and second air outlets can define rectangular slots that can provide a more laminar airflow across the curved surface. The rectangular slots can extend substantially parallel to the longitudinal axis of the body. This allows a larger area of ​​hair to be contacted by the airflow across the curved surface and thus styled by the attachments.

[0025] The first and second air outlets may each have a smaller opening cross-sectional area than the main air outlet. That is, each of the first and second air outlets defined by the respective first and second channels may have a smaller opening cross-sectional area than the main air outlet. For the same airflow rate, this allows the air velocity through the first or second channel to be greater than that through the air outlet, which may be advantageous for hair styling when the main 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 area 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.

[0026] The attachment can be configured such that the airflow at the first and second air outlets includes a velocity in the range of 30 m / s to 65 m / s, for example, in the range of 45 m / s to 55 m / s. The applicant has found that this velocity can be particularly effective in generating airflow along a curved surface, which generates a first force sufficient to attract relatively long hairs towards the first surface, while also generating a second force to push relatively short hairs away from the curved surface. The shape and size of the first and second air outlets can be configured such that the airflow at the first and second air outlets includes a velocity in the range of 30 m / s to 65 m / s. The airflow generator can be configured to generate an airflow at a certain rate, such that the airflow at the main air outlet includes a velocity in the range of 30 m / s to 65 m / s.

[0027] The ratio of the airflow velocity generated by the airflow generator to the cross-sectional area of ​​the openings of the first and second air outlets can be in the range of 0.01 to 0.10. The applicant has found that such a ratio may be particularly effective in generating airflow along a curved surface, where the airflow causes a first force to attract the hair toward the curved surface and a second force to push the hair away from the curved surface.

[0028] The ratio of the radius of curvature of the curved surface to the airflow velocity at the first and second air outlets can be in the range of 0.33 to 2.00, for example, in the range of 0.5 to 1.5. The applicant has found that such a ratio may be particularly effective in generating airflow along the curved surface, which causes a first force to attract the hair toward the curved surface and a second force to push the hair away from the curved surface.

[0029] The ratio of the airflow velocity at the first and second air outlets to the airflow velocity generated by the airflow generator can be in the range of 2.14 to 5.63, for example, in the range of 2.6 to 3.6. The applicant has found that such a ratio may be particularly effective in generating airflow along a curved surface, where the airflow causes a first force to attract the hair toward the curved surface and a second force to push the hair away from the curved surface.

[0030] When the body is in the first position, the curved surface may include a continuous surface extending between the first and second channels. When the attachment is used in multiple orientations, such a continuous surface can facilitate the attraction of hair to the curved surface. The curved surface may include a continuous surface extending from a first side of the body's air outlet around the body to a second side of the body's air outlet.

[0031] The guide may include a first flat surface adjacent to and extending rearward from the first channel, and a second flat surface adjacent to and extending rearward from the second channel. With non-flat surfaces extending rearward from the first and second channels, smoothness may be compromised when the attachment moves relative to the hair during use, which is typically the case during styling operations. When a rough surface extending rearward from the channel is provided, such as a surface including protrusions like bristles or the like, such a rough surface may disrupt hair that has been smoothed by airflow from the channel when the attachment moves relative to the hair during use. By providing first and second flat surfaces adjacent to and extending rearward from the respective first and second channels, a smooth hair surface can be created and maintained when the attachment is moved relative to the hair by the user during use.

[0032] The first and second flat surfaces can also serve as guide surfaces to ensure that the accessory is correctly positioned relative to the user's head, so that the airflow leaving the channel can provide the aforementioned functions.

[0033] The first and second flat surfaces can be substantially smooth and uninterrupted in form. The first and second flat surfaces can include generally planar surfaces. This helps maintain a smooth hair surface when the accessory moves relative to the hair during use and ensures that the hair extending backward from the channel is supported by the surface.

[0034] The attachment can be configured such that when the attachment moves relative to the hair during use, for example when the attachment moves linearly from the root to the tip of the hair in the direction along the hair, the first or second flat surface contacts the hair extending backward from the corresponding first or second channel.

[0035] The first and second flat surfaces may have a height ranging from 5 mm to 20 mm.

[0036] The first and second flat surfaces may be inclined relative to the plane of the respective first or second channel. This ensures that hair extending backward from the respective first or second channel contacts the flat surface, while hair downstream of the respective first or second channel is attracted toward the curved surface during use. The first and second flat surfaces may be inclined at an angle relative to a plane tangent to the curved surface at a point immediately adjacent to the respective first or second channel.

[0037] The accessory may include a pair of guide walls for guiding airflow along the curved surface of the body, the pair of guide walls being upright from the curved surface of the body. By providing a pair of guide walls extending outward from the curved surface, the impact of ambient air on the negative pressure zone generated by the airflow flowing along the curved surface during use can be suppressed, and this can result in an increased attraction of hair toward the curved surface compared to a similar arrangement, for example, without utilizing guide walls.

[0038] 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 this pair of guide walls may be opposite each other, for example, such that they define a channel therebetween, with the curved surface forming a bed of the channel. The pair of guide walls may be spaced apart from each other along the curved surface, for example, spaced apart at opposite edges of the curved surface. The spacing between the guide walls may substantially correspond to the lengths of the first and second channels. 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.

[0039] The guide walls can project outward from a curved surface, for example, the guide walls and guide elements can be integrally formed as a single component. The pair of guide walls can include a height substantially equal to that of the first and second channels. This ensures that a negative pressure zone is maintained along approximately the entire height of the air jet exiting the respective first or second channel during use.

[0040] The pair of guide walls may include a radius of curvature larger than the radius of curvature of the curved surface. For example, the radius of curvature of the pair of guide walls may be larger than the radius of curvature of the curved surface in the region adjacent to the first and second channels. This ensures that the pair of guide walls provides their function in the region adjacent to the first and second channels during use.

[0041] The guide wall can extend from a first channel of the guide to a second channel of the guide around the body. The body can be configured to rotate within a pair of guide walls. This can help stabilize the body relative to the guide to ensure smooth movement of the body between a first position and a second position.

[0042] 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 impact in certain regions of a curved surface, such as in regions adjacent to the first and second channels. The pair of guide walls may include a height that decreases in the direction away from the respective first or second channel. By decreasing the height of the guide walls in the direction away from the first and second channels, less material may be required to form the guide walls compared to, for example, guide walls with a constant height. The pair of guide walls may include a gradually decreasing height in the direction away from the respective first or second channel, for example, so that the height does not change in a step. The guide walls in the pair may each have the same height and may be substantially symmetrical about an axis that divides the space between the guide walls in two.

[0043] The pair of guide walls can include a constant height. This ensures that the negative pressure zone generated near the curved surface is not affected along the length of the curved surface.

[0044] The accessory may include a switching member for switching airflow between a first channel and a second channel. The switching member is movable from a first switching position to a second switching position, in which airflow crosses the curved surface in a first direction through the first channel but not through the second channel; and in the second switching position, in which airflow crosses the curved surface in the opposite second direction through the second air outlet but not through the first channel. This ensures that airflow crosses the curved surface in only one direction during use. This prevents the airflow direction from moving away from the user's head during use, thus reducing wasted airflow and enabling more efficient styling. It also ensures reduced stray airflow from the air outlet that is not used as part of the styling process and can interfere with the styling process during use.

[0045] The switching member can be included in the guide, allowing the body to rotate relative to the switching member between a first position and a second position. For example, the switching member can be located within the guide. When the body is in the first or second position, the different relative positions of the air outlet and the switching member facilitate the operation of the accessory in different modes.

[0046] The switching component can be elongated, with a length at least as long as the air outlet. This reduces air loss as air flows through the air outlet and into the first or second channel, thereby increasing the airflow rate on the curved surface.

[0047] The switching component can extend substantially parallel to the longitudinal axis of the main body. This allows the main body to rotate smoothly relative to the switching component, and the switching component is aligned with the air outlet when the main body is in the first position.

[0048] The switching member may include a curved surface for directing airflow into a first or second channel. That is, the switching member may be concave when the airflow is directed to the curved surface to help align the airflow. The curved surface can help maintain a more laminar airflow.

[0049] 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.

[0050] The accessory may include 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 the user of the accessory. This allows the user to use the accessory in various orientations without the switching member moving between the first and second switching positions.

[0051] The retaining mechanism can be arranged to hold the switching member in another position between 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.

[0052] 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 the 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] The accessory may include ribs positioned such that they interact with airflow in the first or second channel to align the airflow. The ribs can split the airflow exiting the first or second channel in two to align it. By reducing flow separation in the first or second channel, the ribs can reduce noise generated by the airflow within the accessory. When the airflow changes from the radial direction of the air outlet plate to the tangential direction in the first or second channel, the ribs can provide a more laminar airflow by smoothing the airflow.

[0058] The rib can be connected to the switching member such that the position of the rib relative to the first and second channels differs 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.

[0059] 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.

[0060] The accessory may include an alert module configured to notify the user that the subject is in a first and / or second location. 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 subject has reached the first location, and a different second marker when the subject reaches the second location. 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.

[0061] The longitudinal axis of the main body can be substantially coincident with the central axis of the airflow generator, for example, with the central axis of the housing in which the airflow generator is installed.

[0062] The accessory may include an internal baffle to redirect airflow from the airflow generator to the air outlet, for example, by approximately 90 degrees. This allows the main portion of the accessory housing the airflow generator to extend orthogonally relative to the air outlet, providing greater design flexibility and better ergonomics than, for example, accessories where the air outlet is aligned with the main portion of the accessory housing the airflow generator.

[0063] An internal baffle may be included within the body and configured to rotate together with the body between first and second positions. This ensures that airflow is always directed toward the air outlet, regardless of the position of the body relative to the guide.

[0064] The accessory may include an auxiliary housing that extends at least partially between the body and the guide, the auxiliary housing including a second air outlet, wherein the second air outlet is aligned with the air outlet of the body when the body is in the second position.

[0065] The auxiliary housing and guide can be C-shaped. The auxiliary housing can extend around the main body on a first side. The guide can extend around a portion of the main body and the auxiliary housing on a second side.

[0066] According to a second aspect of the invention, a hair care appliance is provided, comprising: a body including an air inlet and an air outlet; an airflow generator for generating an airflow from the air inlet to the air outlet; and a guide for guiding the airflow from the air outlet across a curved surface of the body, such that the airflow guided by the guide generates a first force and a second force, the first force attracting hair toward the curved surface and the second force pushing hair away from the curved surface, wherein the body is rotatable relative to the guide between a first position and a second position, in which airflow leaving the air outlet is guided by the guide, and in the second position, airflow leaving the air outlet is not guided by the guide.

[0067] 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.

[0068] 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.

[0069] When the accessory is attached to the handle unit, the main body can be rigidly held relative to the handle unit, and the guide can rotate relative to the handle. This allows users to switch between operating modes of the hair care device without changing their grip on the device.

[0070] Where appropriate, optional features of various aspects of the invention may be applied equivalently to other aspects of the invention. Attached Figure Description

[0071] Figure 1 This is a schematic diagram illustrating a hair care device according to the present invention;

[0072] Figure 2 Is it through Figure 1 A schematic cross-sectional view of the handle unit of a hair care device;

[0073] 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;

[0074] Figure 4 yes Figure 3 A schematic cross-sectional view of the attachment, showing the attachment in the second mode;

[0075] Figure 5 yes Figure 3 A schematic perspective view of the attachments, showing the attachments in the first mode;

[0076] 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;

[0077] Figure 7 yes Figure 3 A schematic top view of the attachment, showing the attachment in the first mode and the first switching position;

[0078] Figure 8 yes Figure 3 A schematic top view of the attachment, showing the attachment in the first mode and the second switching position;

[0079] Figure 9 yes Figure 3 A schematic exploded view of the appendix;

[0080] Figure 10a This is a schematic cross-sectional view of another attachment, showing the attachment in a second mode;

[0081] Figure 10b yes Figure 10a A schematic perspective view of an embodiment of the appendix;

[0082] Figure 11a These are schematic perspective views of embodiments of the appendix;

[0083] Figure 11b yes Figure 11aA schematic cross-sectional view of the attachment, showing the attachment in the second mode;

[0084] Figure 12a This is a schematic perspective view of another embodiment of the appendix;

[0085] Figure 12b yes Figure 12a A schematic cross-sectional view of the attachments, showing the attachments in the first mode; and

[0086] Figure 12c yes Figure 12a Enlarged partial view of the schematic cross-sectional view of the appendix. Detailed Implementation

[0087] exist Figure 1 The image schematically illustrates a hair care device according to the invention, typically designated 10.

[0088] The hair care device 10 includes a handle unit 12 and an accessory 100 detachably attached to the handle unit 12.

[0089] 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.

[0090] 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 velocity 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.

[0091] 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.

[0092] 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.

[0093] Annex 100 schematically shows in Figure 3-5 and 7-9.

[0094] 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.

[0095] 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 can take many forms and are not relevant to this invention, and therefore will not be described further for brevity.

[0096] 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.

[0097] A schematic cross-sectional view of the curved surface 104 is shown in Figure 4 The 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.

[0098] 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.

[0099] 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.

[0100] 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.

[0101] 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.

[0102] 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.

[0103] 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.

[0104] 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 the 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 an elbow, 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.

[0105] 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.

[0106] 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.

[0107] 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.

[0108] 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.

[0109] 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.

[0110] 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.

[0111] 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.

[0112] 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.

[0113] 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.

[0114] 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.

[0115] 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 hairs toward the curved surface 102, while also generating a second force to push relatively short hairs 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.

[0116] 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.

[0117] 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 , 7In 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.

[0118] 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.

[0119] 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.

[0120] 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.

[0121] 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.

[0122] 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.

[0123] 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] 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.

[0128] 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.

[0129] 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.

[0130] 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.

[0131] 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.

[0132] 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.

[0133] 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 changes direction, 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.

[0134] 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.

[0135] 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.

[0136] Rib 148 includes a generally smooth edge to reduce turbulence in the first and second channels 122, 124.

[0137] Rib 148 is connected to member 149 ( Figure 9 (Best shown in the diagram) The rib 148 remains separate 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.

[0138] 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.

[0139] Rib 148 and connecting member 149 are integrated.

[0140] 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.

[0141] 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.

[0142] 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.

[0143] 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.

[0144] 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 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.

[0145] Now for reference Figures 10a to 12b Alternative arrangements will be discussed, and the same features as those previously described in these figures will be referred to using the same reference numerals.

[0146] exist Figure 10a and 10b Annex 200 is similar to the section on... Figure 3 and 4 The described accessory, however, does not have a single air outlet 110, but rather two air outlets 110a and 110b. The accessory 200 includes a body 102, which includes an air inlet 108, air outlets 110a and 110b, a curved surface 104, and a plurality of internal baffles 114. The accessory 200 has two modes: a first mode in which air is guided out of the accessory via a guide 220, and a second mode in which air exits directly from the air outlets 110a and 110b. In the illustrated configuration, the guide 220 is not aligned with either of the air outlets 110a or 110b. However, the function of the accessory 200 in the first mode will be described. 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. The guide 120 includes a first channel 122 defining a first air outlet 126 and a second channel 124 defining a second air outlet 128. The first channel 122 is arranged to guide airflow across the curved surface 104 in a first direction. The second channel 124 is arranged to guide airflow across the curved surface 104 in a second direction, depending on which of the air outlets 110a and 110b is open (as previously described).

[0147] The main body 102 is rotatable relative to the guide member 120 about its central longitudinal axis 103 between a first position and a second position. In the first position, the guide member 120 guides the airflow leaving the air outlets 110a and 110b. In the second position, the guide member 120 does not guide the airflow leaving the air outlets 110a and 110b. Figure 10a and 10b As shown. In this configuration, air flows directly from air outlets 110a and 110b, and in this example, a coarse drying function is provided for the accessories. This is the opposite of the smoothing function provided when the guide 120 is aligned with one of the air outlets 110a and 110b, as previously described.

[0148] Figure 11a and 11b An accessory 230 with a single air outlet 110 is shown, which can be aligned with guide 220 to provide a shaping function, in this case a smoothing function, or, as shown, can be misaligned with guide 220 so that air leaving air outlet 110 is directed directly toward the user or customer. In this example, switching mechanism 232 is internally housed within body 102 and actuated between a first position and a second position by user torsion actuator 234.

[0149] Figure 12a , 12b Figures 12c show an accessory 250 with a second position that has a secondary function as a styling feature, as it provides a concentrated airflow from a single air outlet 110.

[0150] In the first mode, air exits via guide 220, which includes a first channel 122 defining a first air outlet 126 and a second channel defining a second air outlet 128. A switching member 140 is disposed in the body 102 and rotates relative to the guide 220 to direct airflow to either the first air outlet 126 or the second air outlet 128. A switching baffle 240 extends from the inner surface of the guide 220 to engage with one side of the air outlet 110 of the body 102 to direct airflow to either the first channel 122 or the second channel 124.

[0151] In the second mode, such as Figure 12cAs shown, the main body 102 is rotated 180° relative to the guide 140, and the air outlet 110 is aligned with another channel 262 disposed in the auxiliary housing 270, with air exiting via a slot 260 extending along the length of the auxiliary housing 270. The other channel 262 is narrower than the air outlet 110, concentrating the airflow as it moves along the other channel 262 toward the slot 260. This provides a higher flow velocity than when air just exits the air outlet 110. Both the auxiliary housing 270 and the guide 140 are generally C-shaped, and the space defined by each open end allows the air outlet 110 to be aligned with an air outlet disposed in either the guide 140 or the auxiliary housing 270.

[0152] Channel 262 may alternatively be wider than air outlet 110 to provide a more diffuse flow from the trough. Those skilled in the art will understand that such a change is possible.

[0153] Although described herein as an embodiment with releasable attachments, embodiments in which the hair care device is not comprised of a handle unit and attachments, but rather a single unit, such as the aforementioned combination of a handle unit and attachments.

Claims

1. An accessory for a hair care tool, the accessory comprising: The main body includes an air inlet and an air outlet; and A guide is used to direct airflow from the air outlet across the curved surface of the body, such that the airflow guided by the guide generates a first force that attracts the hair towards the curved surface and a second force that pushes the hair away from the curved surface. The main body can rotate relative to the guide member between a first position and a second position. In the first position, the airflow leaving the air outlet is guided by the guide member, and in the second position, the airflow leaving the air outlet is not guided by the guide member.

2. The appendix according to claim 1, wherein, The first position and the second position are 180 degrees apart from each other.

3. The appendix according to claim 1, wherein, The main body is generally cylindrical and configured to guide airflow radially away from the air outlet.

4. The attachment according to any one of the preceding claims includes a user interface, which is operable by a user to rotate the body relative to the guide between the first position and the second position.

5. The appendix according to claim 4, wherein, The user interface includes a handle protruding from the distal end of the body, wherein the handle is rigidly attached to the body and can be rotated by the user to rotate the body relative to a guide between a first position and a second position.

6. The appendix according to any one of claims 1 to 3, wherein, The guide includes an inner shell arranged to contact the curved surface, wherein the inner shell defines an opening corresponding to the air outlet.

7. The appendix according to any one of claims 1 to 3, wherein, The guide includes a first channel and a second channel, the first channel being arranged to guide airflow across the curved surface in a first direction, and the second channel being arranged to guide airflow across the curved surface in the opposite second direction.

8. The appendix according to claim 7, wherein, The first channel and the second channel define a rectangular groove that extends substantially parallel to the longitudinal axis of the body.

9. The appendix according to claim 7, wherein, The first channel and the second channel each have an opening cross-sectional area smaller than that of the air outlet.

10. The appendix according to claim 7, wherein, The hair care device includes a switching member for switching airflow between the first channel and the second channel. The switching member is movable from a first switching position to a second switching position. In the first switching position, the airflow passes through the first channel and crosses the curved surface in a first direction without passing through the second channel. In the second switching position, the airflow passes through a second air outlet in the opposite second direction and crosses the curved surface without passing through the first channel.

11. The accessory of claim 10, comprising a retaining mechanism for holding the switching member in one of a first and second switching positions when no force is applied to the switching member by a user of the accessory.

12. The appendix according to claim 11, wherein, The holding mechanism includes 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.

13. The appendix according to claim 10, wherein, The switching component is included in the guide.

14. The appendix according to claim 10, wherein, The switching member is elongated, extends substantially parallel to the longitudinal axis of the body, and is at least as long as the air outlet.

15. The appendix according to claim 7, wherein, The guide includes a first flat surface adjacent to and extending rearward from the first channel, and a second flat surface adjacent to and extending rearward from the second channel.

16. The accessory according to any one of claims 1 to 3, comprising a pair of guide walls for guiding airflow along the curved surface, the pair of guide walls being upright from the curved surface.

17. The appendix according to claim 16, wherein, The guide walls extend around the body, and the body is configured to rotate within the pair of guide walls.

18. The accessory of claim 7, comprising a rib positioned such that the rib interacts with airflow in the first or second channel to align the airflow.

19. The appendix according to claim 1, comprising: The auxiliary housing extends at least partially between the main body and the guide. The auxiliary housing includes a second air outlet, wherein when the main body is in the second position, the second air outlet is aligned with an air outlet from the main body.

20. A hair care tool, comprising: The main body includes an air inlet and an air outlet; An airflow generator is used to generate airflow from the air inlet to the air outlet; and A guide is used to direct airflow from the air outlet across the curved surface of the body, such that the airflow guided by the guide generates a first force that attracts the hair to the curved surface and a second force that pushes the hair away from the curved surface. The main body can rotate relative to the guide member between a first position and a second position. In the first position, the airflow leaving the air outlet is guided by the guide member, and in the second position, the airflow leaving the air outlet is not guided by the guide member.

21. The hair care appliance of claim 20, comprising a handle unit and an accessory, wherein an airflow generator is housed within the handle unit, and the accessory is releasably attached to the handle unit, the accessory comprising the body and the guide.

Images