GB2598925A

GB2598925A - Haircare appliance

Info

Publication number: GB2598925A
Application number: GB2014731.0A
Authority: GB
Inventors: Andrew Tibbetts David; Nee Yeoh Sheh
Original assignee: Dyson Technology Ltd
Current assignee: Dyson Technology Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2022-03-23
Anticipated expiration: 2040-09-18
Also published as: JP2023542019A; GB2598925B; WO2022058712A1; KR20230067674A; CN116234476A; GB202014731D0; US20230329414A1

Abstract

A haircare appliance has an air inlet (22, fig. 1), an air outlet, and an airflow generator or fan (16, fig.1) for generating an airflow from the air inlet to the air outlet. The air outlet has a first aperture 136 having a first cross-sectional area, and a second aperture 126 having a second cross-sectional area greater than the first cross-sectional area. The haircare appliance has a first configuration (see figure 8) in which airflow through the second aperture 126 is inhibited, and a second configuration (see figures 9 and 10) in which airflow through the second aperture 126a or 126b is uninhibited. The air outlet may comprise a plurality of first apertures 136. Flow through the first aperture(s) may be uninhibited in the first configuration and inhibited in the second configuration. Moveable members 130 such as bristle beds may move between a first and second position in the first and second configuration to block or align channels and allow or inhibit air flow. The moveble members 130 may be resiliently biased into a first position and moved upon contact with hair. A hair attachment with the above features is also disclosed.

Description

HAIRC ARE APPLIANCE

Field of the Invention

The present invention relates to a haircare appliance, and an attachment for a haircare appliance.

Background of the Invention

Haircare appliances are generally used to treat or style hair, and some haircare appliances may treat or style hair using airflow. To provide versatility in treating and styling hair some haircare appliances provide airflow at a variable flow rate.

Summary of the Invention

According to a first aspect of the present invention there is provided a haircare appliance comprising: an air inlet; an air outlet; and an airflow generator for generating an airflow from the air inlet to the air outlet; wherein the air outlet comprises a first aperture having a first cross-sectional area, and a second aperture having a second cross-sectional area greater than the first cross-sectional area, and the haircare appliance comprises a first configuration in which airflow through the second aperture is inhibited, and a second configuration in which airflow through the second aperture is uninhibited.

The haircare appliance according to the first aspect of the present invention may be advantageous as the haircare appliance comprises a first configuration in which airflow through the second aperture is inhibited, for example such that airflow through an aperture of larger cross-sectional area is inhibited, and a second configuration in which airflow through the second aperture is uninhibited, for example such that airflow through an aperture of larger cross-sectional area is uninhibited In particular, this may allow the haircare appliance to provide different airflow characteristics when in the first and second configurations, with the airflow characteristics dependent on the relative sizing of the first and second apertures.

Airflow through the first aperture may be uninhibited in the first configuration. This may allow relatively diffuse airflow to be provided in the first configuration. Airflow through the first aperture may be inhibited in the second configuration. This may ensure that all airflow passes through the second aperture in the second configuration.

The second aperture may comprise a generally rectangular cross-sectional area. The first aperture may comprise a generally circular cross-sectional area. The first aperture may comprise a diameter of no more than 1/10th a length of the second aperture, for example of no more than 1/20th a length of the second aperture. Airflow through the second aperture may be fully inhibited in the first configuration, for example with the second aperture fully occluded in the first configuration.

The haircare appliance may be configured to move from the first configuration to the second configuration in response to contact with hair, for example in response to a force applied by contact with hair in use. This may provide an automatic switch from the first configuration to the second configuration in use when hair contacts the haircare appliance, for example when hair contacts the haircare appliance and relative movement occurs between the hair and the haircare appliance. This may provide for increased ease of use compared to, for example, an arrangement where user input is required to switch between the first and second configurations, and may provide an enhanced user experience. The haircare appliance may comprise a plurality of bristles for contacting hair, and the haircare appliance may be configured to move from the first configuration to the second configuration in response to contact of hair with the bristles, for example in response to contact of hair with the bristles and force applied to the bristles through contact with the hair.

The air outlet may comprise a plurality of first apertures, each first aperture having the first cross-sectional area, airflow through each of the plurality of first apertures may be uninhibited in the first configuration, and airflow through each of the plurality of first apertures may be inhibited in the second configuration. By utilising a plurality of first apertures having relatively smaller cross-sectional areas than the second aperture, a relatively diffuse flow of air may be provided when the haircare appliance is in the first configuration.

The plurality of first apertures may be disposed in rows, for example rows located upon the movable member. Each row of first apertures may be located adjacent a row of bristles, for example with rows of first apertures intermediate rows of bristles. The plurality of first apertures may be formed in the movable member, for example formed in the solid body of the movable member.

The haircare appliance may comprise a moveable member movable from a first position corresponding to the first configuration to a second position corresponding to the second configuration, airflow through the second aperture may be inhibited by the movable member in the first position, and airflow through the second aperture may be uninhibited by the movable member in the second position. Such a movable member may provide a simple and inexpensive mechanism for switching the haircare appliance between the first and second configurations.

The movable member may comprise a solid body within which the first aperture is formed, with the solid body misaligned with the channel in the first position and aligned with the channel in the second position. Thus the solid body may block the channel in the second position.

The haircare appliance may comprise a fixed body, and the movable member may be pivotally or rotatably mounted to the fixed body. A pivotal or rotational mounting may provide a simple mounting mechanism for the movable member.

The first aperture may be formed in the movable member, the haircare appliance may comprise a main airflow path, and a channel leading from the main airflow path to the movable member, the channel is aligned with the first aperture in the first position, and the channel is blocked by the movable member in the second position. Use of a movable member which can allow or inhibit airflow through both the first and second apertures may reduce a number of component parts required relative to, for example, an arrangement where separate movable members are required for each of the first and second apertures.

The solid body of the movable member may occlude the second aperture in the first position, and may be misaligned with the second aperture in the second position. The second aperture may comprise a length substantially corresponding to a length of the movable member, for example a length in a direction parallel to a longitudinal extent of the haircare appliance. The second aperture may comprise a slot formed in the fixed body, for example a slot that exposes the main airflow path to the exterior of the haircare appliance. The first aperture may comprise a diameter of no more than 1/10th a length of the movable member, for example of no more than 1/20th a length of the movable member. The first aperture may comprise a diameter of no more than 1/10th a length of the second aperture, for example of no more than 1/20th a length of the second aperture.

The haircare appliance may comprise a fixed body to which the movable member is mounted, a plurality of rows of first apertures formed in the movable member, and a plurality of channels formed in the fixed body, each channel leading from the main airflow path to the movable member, each channel aligned with a respective row of first apertures in the first position, and each channel blocked by the movable member in the second position The second aperture may be formed in the fixed body and may extend parallel to one of the channels. The second aperture and the plurality of channels may define a slatted structure on the fixed body.

The fixed body may comprise an inner body and an outer body between which the main airflow path is formed, the channels and the second aperture formed in the outer body.

S

The outer body may comprise a plurality of parallel walls spaced apart to define the channels and the second aperture.

The movable member may be resiliently biased into the first position. Resiliently biasing the movable member into the first position may ensure that a default configuration of the haircare appliance, for example when the haircare appliance is not in contact with hair, is the first configuration in which airflow through the second aperture, for example an aperture of larger cross-sectional area, is inhibited. This may, for example, ensure that when hair is not in contact with the haircare appliance a relatively diffuse airflow is provided through the first aperture of smaller cross-sectional area. This may be beneficial where the haircare appliance is approaching hair, but not in contact with hair in use, as a more concentrated airflow may interact more strongly with hair which can lead to uncontrolled styling.

The movable member may comprise a plurality of bristles for contacting hair. This may provide an engagement mechanism for engaging the movable member with hair, and causing movement of the movable member from the first position to the second position Relative motion between the bristles and hair whilst hair is engaged with the bristles may cause movement of the movable member from the first position to the second position.

The movable member may comprise a bristle pad, for example a pad with a plurality of bristles extending outwardly from the pad, with the pad pivotably or rotatably mounted, and the pad defined by the solid body.

The haircare appliance may comprise a pair of second apertures spaced about the periphery of the haircare appliance, the movable member may be movable in a first direction from a first position corresponding to the first configuration to a second position corresponding to the second configuration, and movable in a second direction from the first position to a third position corresponding to the second configuration, the second direction opposite to the first direction, airflow through each of the pair of second apertures may be inhibited by the movable member in the first position, airflow through a first of the pair of second apertures may be uninhibited and airflow through a second of the pair of second apertures may be inhibited by the movable member in the second position, and airflow through the first of the pair of second apertures may be inhibited and airflow through the second of the pair of second apertures may be uninhibited by the movable member in the third position.

In such a manner a second aperture, for example an aperture having a relatively large cross-sectional area, may be opened for the provision of airflow when the movable member is moved in either of two opposing directions. This may provide greater flexibility when styling hair, for example by ensuring that a second aperture with a relatively large cross-sectional area is opened when the haircare appliance is dragged through hair in either of an upward or a downward direction.

Airflow through the first aperture may be uninhibited in the first position, and inhibited in the second and third positions The first of the pair of second apertures may be configured to provide airflow in the second direction when the movable member is in the second position, and the second of the pair of second apertures is configured to provide airflow in the first direction when the movable member is in the third position. Thus the pair of second apertures may be utilised to provide airflow in opposing directions, with the direction of airflow provided by a second aperture opposite to the direction in which the movable member has moved to open the second aperture.

The haircare appliance may comprise a plurality of first apertures, a plurality of movable members each comprising at least one of the first apertures, and a plurality of channels each leading from the main airflow path to a respective movable member, and wherein each movable member is movable from a first position corresponding to the first configuration to a second position corresponding to the second configuration, the respective channel is aligned with the first apertures in the movable member in the first position, and the respective channel is blocked by the movable member in the second position.

This may provide an arrangement with a plurality of first apertures, each having a relatively small cross-sectional area, spaced about the periphery of the haircare appliance, which may allow a relatively diffuse airflow to be provided about the periphery of the haircare appliance. The plurality of movable members may each comprise a plurality of bristles.

The haircare appliance may comprise a plurality of second apertures spaced about the periphery of the haircare appliance, airflow through each of the second apertures may be inhibited by a movable member in the first position, and airflow through each of the second apertures may be uninhibited by a movable member in the second position. This may provide an arrangement with a plurality of second apertures, each having a relatively large cross-sectional area, spaced about the periphery of the haircare appliance, which may allow for provision of a relatively large jet of air irrespective of a point of contact of hair with the haircare appliance.

The haircare appliance may comprise a plurality of pairs of second apertures spaced about the periphery of the haircare appliance, each movable member corresponding to a respective pair of second apertures, each movable member movable in a first direction from a first position corresponding to the first configuration to a second position corresponding to the second configuration, and movable in a second direction from the first position to a third position corresponding to the second configuration, the second direction opposite to the first direction airflow through each of the pair of second apertures may be inhibited by a respective movable member in the first position, airflow through a first of each pair of second apertures may be uninhibited and airflow through a second of each pair of second apertures may be inhibited by a respective movable member in the second position, and airflow through the first of each pair of second apertures may be inhibited and airflow through the second of each pair of second apertures may be uninhibited by a respective movable member in the third position.

This may provide a plurality of pairs of second apertures spaced about the periphery of the haircare appliance, which may allow for opening of an aperture of relatively large cross-sectional area both irrespective of a point of contact of hair with the haircare appliance, and irrespective of a direction of motion of the movable member.

The haircare appliance may comprise a handle unit within which the airflow generator is disposed, and an attachment defining the air outlet, the attachment removably attachable to the handle unit. Providing the air outlet described above as part of a removable attachment may allow the functionality described herein to be selectively provided by a user.

According to a second aspect of the present invention there is provided an attachment for a haircare appliance comprising an airflow generator disposed in a handle unit, the attachment comprising an air inlet for receiving an airflow from the airflow generator, and an air outlet for emitting airflow, wherein the air outlet comprises a first aperture having a first cross-sectional area, and a second aperture having a second cross-sectional area greater than the first cross-sectional area, and the attachment comprises a first configuration in which airflow through the second aperture is inhibited, and a second configuration in which airflow through the second aperture is uninhibited.

The attachment may be configured to move from the first configuration to the second configuration in response to contact with hair.

The attachment may comprise a moveable member movable from a first position corresponding to the first configuration to a second position corresponding to the second configuration, airflow through the second aperture may be inhibited by the movable member in the first position, and airflow through the second aperture may be uninhibited by the movable member in the second position The first aperture may be formed in the movable member, the haircare appliance may comprise a main airflow path, and a channel leading from the main airflow path to the movable member, the channel may be aligned with the first aperture in the first position, and the channel blocked by the movable member in the second position.

The attachment may comprise a pair of second apertures spaced about the periphery of the haircare appliance, the movable member may be movable in a first direction from a first position corresponding to the first configuration to a second position corresponding to the second configuration, and movable in a second direction from the first position to a third position corresponding to the second configuration, the second direction opposite to the first direction, airflow through each of the pair of second apertures may be inhibited by the movable member in the first position, airflow through a first of the pair of second apertures may be uninhibited and airflow through a second of the pair of second apertures may be inhibited by the movable member in the second position, and airflow through the first of the pair of second apertures may be inhibited and airflow through the second of the pair of second apertures may be uninhibited by the movable member in the third position.

The attachment may comprise a plurality of first apertures, a plurality of movable members each comprising at least one of the first apertures, and a plurality of channels each leading from the main airflow path to a respective movable member, and wherein each movable member is movable from a first position corresponding to the first configuration to a second position corresponding to the second configuration, the respective channel may be aligned with the first apertures in the movable member in the first position, and the respective channel may be blocked by the movable member in the second position The attachment may comprise a plurality of second apertures spaced about the periphery of the haircare appliance, airflow through each of the second apertures may be inhibited by a movable member in the first position, and airflow through each of the second apertures may be uninhibited by a movable member in the second position.

The attachment may comprise a plurality of pairs of second apertures spaced about the periphery of the haircare appliance, each movable member corresponding to a respective pair of second apertures, each movable member movable in a first direction from a first position corresponding to the first configuration to a second position corresponding to the second configuration, and movable in a second direction from the first position to a third position corresponding to the second configuration, the second direction opposite to the first direction, airflow through each of the pair of second apertures may be inhibited by a respective movable member in the first position, airflow through a first of each pair of second apertures may be uninhibited and airflow through a second of each pair of second apertures may be inhibited by a respective movable member in the second position, and airflow through the first of each pair of second apertures may be inhibited and airflow through the second of each pair of second apertures may be uninhibited by a respective movable member in the third position Optional features of aspects of the present invention may be equally applied to other aspects of the present invention, where appropriate.

Brief Description of the Drawings

Figure 1 is a schematic view of a haircare appliance according to an example, Figure 2 is a schematic cross-sectional view of the haircare appliance of Figure 1; Figure 3 is a schematic view of an attachment for the haircare appliance of Figure 1; Figure 4 is a schematic view of a fixed body of the attachment of Figure 3; Figure 5 is a schematic cross-sectional view of the fixed body of Figure 4; Figure 6 is a schematic view of a bristle bed of the attachment of Figure 3 with bristles shown; Figure 7 is a schematic view of the bristle bed of Figure 6 with bristles removed; Figure 8 is a schematic view illustrating a rest configuration of the attachment of Figure 3; Figure 9 is a schematic view illustrating a first displaced configuration of the attachment of Figure 3; and Figure 10 is a schematic view illustrating a second displaced configuration of the attachment of Figure 3.

Detailed Description of the Invention

A haircare appliance according to the present invention, generally designated 10, is shown schematically in Figure 1.

The haircare appliance 10 comprises a handle unit 12, and an attachment 100 removably attachable to the handle unit 12.

The handle unit 12 comprises a housing 14, an airflow generator 16, a heater 18, and a control unit 20, as can be seen schematically in Figure 2.

The housing 14 is tubular in shape, and comprises an air inlet 22 through which an airflow is drawn into the housing 14 by the airflow generator 16, and an air outlet 24 through which the airflow is discharged from the housing 14. The airflow generator 16 is housed within the housing 14, and comprises an impeller 26 driven by an electric motor 28. The heater 18 is also housed within the housing 14, and comprises heating elements 30 to optionally heat the airflow.

The control unit 20 comprises electronic circuitry for a user interface 32 and a control module 34. The user interface 32 is provided on an outer surface of the housing 14, and is used to power on and off the haircare appliance 10, to select a flow rate (for example high, medium and low), and to select an airflow temperature (for example hot, medium or cold). In the example of Figure 1, the user interface comprises a plurality of sliding switches, but other forms of user interface 32, for example buttons, dials or touchscreens, are also envisaged.

The control module 34 is responsible for controlling the airflow generator 16, and the heater 18 in response to inputs from the user interface 32. For example, in response to inputs from the user interface 32, the control module 34 may control the power or the speed of the airflow generator 16 in order to adjust the airflow rate of the airflow, and the power of the heater 18 in order to adjust the temperature of the airflow.

The attachment 100 is shown in Figures 3 to 5 and is generally cylindrical in form, and is open at one end and closed at the other end. The open end serves as an inlet 102 into the attachment 100, with the air inlet 102 receiving airflow from the air outlet 24 of the handle unit 12 when attached in use.

The attachment 100 comprises a fixed body 104, and a plurality of movable members in the form of bristle beds 106 rotatably mounted to the fixed body 104.

The fixed body 104 is generally cylindrical in form, as seen in Figure 4, and an interior of the fixed body 104 acts as a main airflow path 118 through the attachment 100. The fixed body 104 has a connection portion 110 for connection to the handle unit 12, with the connection portion 110 having a number of projections 112 which are receivable within corresponding recesses 116 formed on the handle unit 12 to ensure correct connection and alignment A plurality of slots formed in the main body 104 define channels 124 and airflow slots 126 Whilst the fixed body 104 is shown in Figure 4 as having a number of channels 124 and airflow slots 126 spaced longitudinally along the length of the attachment, it will be appreciated that in other embodiments the channels 124 and airflow slots 126 may extend unintermpted along the length of the fixed body 104, and hence that a collection of channels 124 or a collection of airflow slots 126 along the length of the fixed body may be thought of as one channel 124 or one airflow slot 126 as appropriate.

The channels 124 have generally linear edges such that the channels 124 are generally rectangular in form, as seen in Figure 5. The airflow slots 126 have generally linear edges such that the airflow slots 126 are generally trapezoidal in form, and this may be used to direct airflow as will be described in more detail hereafter.

The airflow slots 126 are arranged in pairs, with each airflow slot 126 of a pair spaced circumferentially from the other airflow slot 126 of the pair. A plurality of channels 124 are located between airflow slots 126 of the same pair, whilst airflow slots 126 of two different pairs are located adjacent one another. In such a manner, a repeating pattern of pairs of airflow slots 126 with intermediate channels 124 is defined circumferentially about the fixed body 104, with each pair of airflow slots 126 and associated intermediate channels 124 referred to as an airflow section 128 herein.

A bristle bed 106 is shown in isolation in Figures 6 and 7. Each bristle bed 106 comprises a solid body 130 which is generally cuboidal in form, although curved to match the curvature of the fixed body 104. Upper and lower pivot arms 132 extend radially inwardly from central positions on upper and lower edges of the solid body 130, with each pivot arm 132 comprising a through-hole 134 which enables the pivot arms 132 to be stacked on pins attached to the fixed body 104 of the attachment 100. The portion of the pivot arm 132 that comprises the through-hole 134 is located at different heights for different bristle beds 106 to enable the stacking. In such a manner the bristle beds 106 may rotate relative to the fixed body 104 as will be described in more detail hereafter. Each upper pivot arm 132 also comprises circumferential projections 133 which can be received within resilient members 135, for example springs, to ensure correct spacing of the bristle beds 106 about the fixed body 104, and to hold the bristle beds 106 in a rest configuration The upper mounting mechanism is hidden by a cap 114 on the attachment 100, and as shown in Figure 4 a mounting pin 108 for the bristle beds 106 extends downwardly from the cap 114.

Each bristle bed 106 has a plurality of bristles 134 arranged in rows that extend longitudinally along the length of the bristle bed 106. The bristles 134 are resiliently deformable, and are intended to contact hair in use. Each individual bristle 134 may be located within a recess or through-hole 137 in the solid body 130, but may fill the recess or through-hole such that airflow cannot escape therethrough in use.

Located intermediate adjacent rows of bristles 134 is a row of apertures 136. The apertures 136 act as part of an air outlet of the attachment 100 as will be described in more detail hereafter. Each aperture 136 has a first relatively small cross-sectional area, such that airflow from each aperture 136 is relatively diffuse. The bristles 134 and the apertures 136 are disposed in alternating rows in the example of Figures 6 and 7, although it will be recognised that other patterns of rows are also envisaged, for example with two rows of apertures 136 intermediate adjacent rows of bristles 134.

When the bristle beds 106 are mounted to the fixed body 104, the bristle beds 106 each overlie a corresponding airflow section 128, and each bristle bed 106 is resiliently biased into a rest configuration by engagement of the circumferential projections 133 with the resilient members 135.

The rest configuration is illustrated schematically in Figure 8. In the rest configuration, each bristle bed 106 is located relative to the fixed body 104 such that the solid body of the bristle bed 106 overlies and occludes a pair of airflow slots 126, whilst the rows of apertures 136 of the bristle bed 106 overlie and are in alignment with the channels 124 of the fixed body 104. Thus in the rest configuration of a bristled bed 106, airflow through the airflow slots 126 is inhibited by the solid body 130 of the bristle bed 106, whilst airflow through the rows of apertures 136 is uninhibited by virtue of the alignment with the apertures 136 of the bristle bed 106 with the channels 124 of the fixed body 104, which provide a path from the main airflow path 118 to the apertures 136. It will be appreciated that each airflow slot 126 has a substantially greater cross-sectional area than any one of the apertures 136 of the bristle bed 106, and hence in the rest configuration airflow through an aperture, for example an airflow slot 126, having a larger cross-sectional area is inhibited, whilst airflow through an aperture having a smaller cross-sectional area, for example any one of the apertures 136 of the bristle bed 106, is uninhibited.

Such a rest configuration may provide a relatively diffuse airflow through the apertures 136 of the bristle beds 106, for example when the attachment is not engaged with hair in use. This may avoid the provision of concentrated airflow until the attachment 100 is brought into contact with hair, as will be described with reference to Figures 9 and 10 below.

A first displaced configuration of a bristle bed 106 relative to the fixed body 104 is shown schematically in Figure 9. Here the bristle bed has been moved to the right relative to the rest configuration of Figure 8, for example in an anticlockwise direction about the attachment 100. Such a displaced configuration occurs in use of the haircare appliance 10 when the bristles 134 of the bristle bed 106 contact hair and the attachment 100 is dragged through hair in use. In particular, the force of engagement of the hair with the bristles 134 overcomes the force of the relevant resilient member 135 to cause the bristle bed 106 to move relative to the fixed body 104.

In the first displaced configuration of Figure 9, the solid body 130 of the bristle bed 106 no longer occludes the left-hand airflow slot 126a, and the rows of apertures 136 are misaligned with the channels 124 of the fixed body 104, such that the channels 124 are blocked by the solid body 130 of the bristle bed 106. The right-hand airflow slot 126b remains occluded by the solid body 130 of the bristle bed 106 Thus in the first displaced configuration of Figure 9, airflow through the left-hand airflow slot 126a is uninhibited as the solid body 130 of the bristle bed 106 no longer overlies the left-hand airflow slot 12a6, whilst airflow through the apertures 136 is inhibited by virtue of misalignment of the apertures 136 with the channels 124, and the channels 124 being blocked by the solid body 130 of the bristle bed 106. Airflow through the right-hand airflow slot 126b remains inhibited by the solid body 130 of the bristle bed 106. Collectively, the airflow slots 126 and the apertures 136 can be thought of as defining an air outlet of the attachment 100.

It will be appreciated that each airflow slot 126 has a substantially greater cross-sectional area than any one of the apertures 136 of the bristle bed 106, and hence in the first displaced configuration of Figure 9 airflow through an aperture, for example the left-hand airflow slot 126a, having a larger cross-sectional area is uninhibited, whilst airflow through an aperture haying a smaller cross-sectional area, for example any one of the apertures 136 of the bristle bed 106, is inhibited. In such a manner a relatively concentrated airflow may be emitted through the left-hand airflow slot 126 when the bristle bed 106 is engaged by hair in use. This may provide automatic switching from diffuse to concentrated airflow, may provide enhanced control over styling, for example by avoiding concentrated flow until the attachment 100 is in contact with hair in use, and may provide reduced drying time for hair.

In the example of Figure 9, the walls of the left-hand airflow slot 126a are shaped such that airflow through the left-hand airflow slot 126a is emitted in a left-hand direction as viewed in Figure 9, which may be a clockwise direction, and that this direction of emission is generally in an opposing direction to the direction in which the bristle bed 106 has been moved.

The bristle bed 106 returns to the rest configuration of Figure 8 from the first displaced configuration of Figure 9 under the action of the relevant resilient member 135 when not in contact with hair.

A second displaced configuration of a bristle bed 106 relative to the fixed body 104 is shown schematically in Figure 10 Here the bristle bed has been moved to the left relative to the rest configuration of Figure 8, for example in a clock-wise direction about the attachment 100 Such a displaced configuration occurs in use of the haircare appliance 10 when the bristles 134 of the bristle bed 106 contact hair and the attachment 100 is dragged through hair in use. In particular, the force of engagement of the hair with the bristles 134 overcomes the force of the relevant resilient member 135 to cause the bristle bed 106 to move relative to the fixed body 104.

In the second displaced configuration of Figure 10, the solid body 130 of the bristle bed 106 no longer occludes the right-hand airflow slot 126b, and the rows of apertures 136 are misaligned with the channels 124 of the fixed body 104, such that the channels 124 are blocked by the solid body 130 of the bristle bed 106. The left-hand airflow slot 126a remains occluded by the solid body 130 of the bristle bed 106. Thus in the second displaced configuration of Figure 10, airflow through the right-hand airflow slot 126b is uninhibited as the solid body 130 of the bristle bed 106 no longer overlies the right-hand airflow slot 126b, whilst airflow through the apertures 136 is inhibited by virtue of misalignment of the apertures 136 with the channels 124, and the channels 124 being blocked by the solid body HO of the bristle bed 106. Airflow through the left-hand airflow slot 126a remains inhibited by the solid body 130 of the bristle bed 106.

It will be appreciated that each airflow slot 126 has a substantially greater cross-sectional area than any one of the apertures 136 of the bristle bed 106, and hence in the second displaced configuration of Figure 10 airflow through an aperture, for example the right-hand airflow slot 126b, having a larger cross-sectional area is uninhibited, whilst airflow through an aperture having a smaller cross-sectional area, for example any one of the apertures 136 of the bristle bed 106, is inhibited. In such a manner a relatively concentrated airflow may be emitted through the right-hand airflow slot 126b when the bristle bed 106 is engaged by hair in use. This may provide automatic switching from diffuse to concentrated airflow, and may provide enhanced control over styling, for example by avoiding concentrated flow until the attachment 100 is in contact with hair in use.

In the example of Figure 10, the walls of the right-hand airflow slot 126b are shaped such that airflow through the right-hand airflow slot 126b is emitted in a right-hand direction as viewed in Figure 10, which may be an anticlockwise direction, and that this direction of emission is generally in an opposing direction to the direction in which the bristle bed 106 has been moved.

The bristle bed 106 returns to the rest configuration of Figure 8 from the second displaced configuration of Figure 10 under the action of the resilient member 135 when not in contact with hair.

By providing both the first displaced configuration of Figure 9 and the second displaced configuration of Figure 10, switching from airflow through apertures of smaller cross-sectional area to airflow through an aperture of larger cross-sectional area may be achieved irrespective of a direction in which the attachment 100 is moved through hair in use.

Each of the bristle beds 106 of the attachment may be movable in a similar manner to that discussed above, such that each bristle bed 106 has the rest and first and second displaced configurations. In such a manner airflow slots 126 may be selectively opened about the circumferential extent of the attachment when engaged with hair in use, for example as the attachment 100 is rotated whilst being dragged through hair.

Whilst the airflow slots 126 are shown in Figure 8 as being fully occluded in the rest configuration, such that airflow is completely inhibited through the airflow slots 126 in the rest configuration, alternative embodiments are also envisaged where the solid body of the bristle bed 106 partially overlies and partially occludes a pair of airflow slots 126 in the rest configuration. In such an embodiment, airflow is still inhibited through the airflow slots 126 in the rest configuration, although some airflow can now pass through the airflow slots 126 in the rest configuration.

The airflow slots 126 as previously described have edges that are intended to give airflow through the slots 126 directionality in either a clockwise or anticlockwise direction about the attachment 100. In other embodiments, the airflow slots 126 may be shaped such that airflow through the airflow slots 126 is in a direction generally normal to the face of the bristle bed 106.

Embodiments are also envisaged where, rather than the haircare appliance 10 comprising a handle unit 12 and an attachment 100, the haircare appliance 10 is a single-piece unit, for example taking the form of the combined handle unit 12 and attachment 100 previously described.

Claims

Claims A haircare appliance comprising: an air inlet; an air outlet; and an airflow generator for generating an airflow from the air inlet to the air outlet, wherein the air outlet comprises a first aperture having a first cross-sectional area, and a second aperture having a second cross-sectional area greater than the first cross-sectional area, and the haircare appliance comprises a first configuration in which airflow through the second aperture is inhibited, and a second configuration in which airflow through the second aperture is uninhibited.
2. A haircare appliance as claimed in Claim 1, wherein airflow through the first aperture is uninhibited in the first configuration.
3. A haircare appliance as claimed in Claim 1 or Claim 2, wherein airflow through the first aperture is inhibited in the second configuration.
4. A haircare appliance as claimed in any preceding claim, wherein the haircare appliance is configured to move from the first configuration to the second configuration in response to contact with hair.
5. A haircare appliance as claimed in any preceding claim, wherein the air outlet comprises a plurality of first apertures, each first aperture having the first cross-sectional area, airflow through each of the plurality of first apertures is uninhibited in the first configuration, and airflow through each of the plurality of first apertures is inhibited in the second configuration.
6 A haircare appliance as claimed in any preceding claim, wherein the haircare appliance comprises a moveable member movable from a first position corresponding to the first configuration to a second position corresponding to the second configuration, airflow through the second aperture is inhibited by the movable member in the first position, and airflow through the second aperture is uninhibited by the movable member in the second position.
7. A haircare appliance as claimed in Claim 6, wherein the first aperture is formed in the movable member, the haircare appliance comprises a main airflow path, and a channel leading from the main airflow path to the movable member, the channel is aligned with the first aperture in the first position, and the channel is blocked by the movable member in the second position.
8. A haircare appliance as claimed in Claim 7, wherein the haircare appliance comprises a fixed body to which the movable member is mounted, a plurality of rows of first apertures formed in the movable member, and a plurality of channels formed in the fixed body, each channel leading from the main airflow path to the movable member, each channel aligned with a respective row of first apertures in the first position, and each channel blocked by the movable member in the second position.
9. A haircare appliance as claimed in Claim 8, wherein the second aperture is formed in the fixed body and extends parallel to one of the channels.
10. A haircare appliance as claimed in any of Claims 6 to 9, wherein the movable member is resiliently biased into the first position.
11 A haircare appliance as claimed in any of Claims 6 to 10, wherein the movable member comprises a plurality of bristles for contacting hair.
12. A haircare appliance as claimed in any of Claims 6 to 11, wherein the haircare appliance comprises a pair of second apertures spaced about the periphery of the haircare appliance, the movable member is movable in a first direction from a first position corresponding to the first configuration to a second position corresponding to the second configuration, and movable in a second direction from the first position to a third position corresponding to the second configuration, the second direction opposite to the first direction, airflow through each of the pair of second apertures is inhibited by the movable member in the first position, airflow through a first of the pair of second apertures is uninhibited and airflow through a second of the pair of second apertures is inhibited by the movable member in the second position, and airflow through the first of the pair of second apertures is inhibited and airflow through the second of the pair of second apertures is uninhibited by the movable member in the third position..
13. A haircare appliance as claimed in Claim 12, wherein the first of the pair of second apertures is configured to provide airflow in the second direction when the movable member is in the second position, and the second of the pair of second apertures is configured to provide airflow in the first direction when the movable member is in the third position.
14. A haircare appliance as claimed in any of Claims 6 to 13, wherein the haircare appliance comprises a plurality of first apertures, a plurality of movable members each comprising at least one of the first apertures, and a plurality of channels each leading from the main airflow path to a respective movable member, and wherein each movable member is movable from a first position corresponding to the first configuration to a second position corresponding to the second configuration, the respective channel is aligned with the first apertures in the movable member in the first position, and the respective channel is blocked by the movable member in the second position.
15 A haircare appliance as claimed in Claim 14, wherein the haircare appliance comprises a plurality of second apertures spaced about the periphery of the haircare appliance, airflow through each of the second apertures is inhibited by a movable member in the first position, and airflow through each of the second apertures is uninhibited by a movable member in the second position.
16 A haircare appliance as claimed in Claim 14 or Claim 15, wherein the haircare appliance comprises a plurality of pairs of second apertures spaced about the periphery of the haircare appliance, each movable member corresponding to a respective pair of second apertures, each movable member movable in a first direction from a first position corresponding to the first configuration to a second position corresponding to the second configuration, and movable in a second direction from the first position to a third position corresponding to the second configuration, the second direction opposite to the first direction, airflow through each of the pair of second apertures is inhibited by a respective movable member in the first position, airflow through a first of each pair of second apertures is uninhibited and airflow through a second of each pair of second apertures is inhibited by a respective movable member in the second position, and airflow through the first of each pair of second apertures is inhibited and airflow through the second of each pair of second apertures is uninhibited by a respective movable member in the third position.
17. A haircare appliance as claimed in any preceding claim, wherein the haircare appliance comprises a handle unit within which the airflow generator is disposed, and an attachment defining the air outlet, the attachment removably attachable to the handle unit.
18. An attachment for a haircare appliance comprising an airflow generator disposed in a handle unit, the attachment comprising an air inlet for receiving an airflow from the airflow generator, and an air outlet for emitting airflow, wherein the air outlet comprises a first aperture having a first cross-sectional area, and a second aperture having a second cross-sectional area greater than the first cross-sectional area, and the attachment comprises a first configuration in which airflow through the second aperture is inhibited, and a second configuration in which airflow through the second aperture is uninhibited.