Floor brush assembly and cleaning equipment

Abstract

The invention provides a floor brush assembly and cleaning equipment, two blades are assembled in the floor brush assembly, each blade comprises a plurality of cutter teeth arranged at intervals, each cutter tooth comprises two tooth edges deviating from each other, and in the relative movement process of the two blades, the two tooth edges are separated from each other. The tooth edges of the cutter teeth of one blade and the tooth edges of the cutter teeth of the other blade form a relatively closed cutting space, and hair on the rolling brush is cut by the tooth edges of the two blades in the cutting space, so that the hair is prevented from being pushed outwards, and the cutting efficiency of the hair is improved; the two blades reciprocate in the axial direction of the rolling brush, the moving directions of the two blades are always opposite, high-frequency staggered cutting is formed on the hair wound on the rolling brush, and the hair cutting efficiency of the cleaning equipment is further improved. The hair cutting device has the advantages that the hair cutting efficiency of the cleaning equipment and the user experience feeling are improved.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment, specifically to a floor brush assembly and cleaning equipment. Background Technology

[0002] Cleaning equipment is an electrical appliance that uses a motor to drive blades to rotate at high speed, creating negative air pressure inside a sealed floor brush housing. This draws dust into a dust collection device and then discharges the filtered air at extremely high speed. Cleaning equipment can be classified by function into dry cleaning equipment and wet / dry cleaning equipment. Dry cleaning equipment generally includes dust bag type and dust cup type.

[0003] Existing cleaning equipment often gets tangled in hair during operation, and there is no effective way to deal with it. When in use, the brush components on the roller brush adsorb dust and hair on the ground and cleaning surface, but the hair gradually extends and tangles inside the brush components under the influence of airflow and other factors, making subsequent cleaning by the roller brush very difficult.

[0004] Currently, the tooth grooves between the blades in cleaning equipment are larger than the bottom of the grooves. This tooth shape pushes hair that is not cut off in time outwards, causing the hair to get tangled at the base of the roller brush and unable to be cut, resulting in poor cutting effect. Moreover, most hair cutting solutions in cleaning equipment use a single-blade motion cutting method, but this method has low cutting efficiency. A double-blade motion cutting method can achieve more efficient cutting, but due to the complexity and difficulty of its mechanism implementation, there is still no good solution. Summary of the Invention

[0005] This application provides a floor brush assembly and cleaning equipment to solve the problem of low hair cutting efficiency in existing cleaning equipment.

[0006] This application provides a floor brush assembly, including a roller brush and two stacked blades. Each blade includes a plurality of spaced-apart teeth that extend toward the roller brush; wherein, along the axial direction of the roller brush, each tooth includes two opposing cutting edges; during relative movement of the two blades, the cutting edges of the teeth in one blade and the cutting edges of the teeth in the other blade form a relatively enclosed cutting space.

[0007] Furthermore, each cutting tooth includes a bottom, a middle, and a top connected in sequence, wherein the middle portion forms a concave portion; a tooth groove is formed between two adjacent cutting teeth on the same blade, the width of the groove opening and the width of the groove bottom are both smaller than the distance between the two concave portions in the middle of the tooth groove; wherein, when the two blades are translated in opposite directions, the object to be cut, located in the tooth grooves of the two blades, slides along the cutting edge of the cutting tooth toward the concave portion and is cut by the cutting edge of the two blades.

[0008] Furthermore, when the two blades are stationary relative to each other, the two blades are axially misaligned; when the two blades move relative to each other, the translational directions of the two blades are always opposite.

[0009] Furthermore, the floor brush assembly also includes a floor brush housing, a motor, a transmission block, and an eccentric wheel.

[0010] The floor brush housing includes a motor compartment and a roller brush compartment; the roller brush is rotatably installed in the roller brush compartment; the motor is installed in the motor compartment, and the motor includes a power output shaft, the central axis of which is perpendicular to the bottom surface of the blade; a transmission block is fixed to a blade; the transmission block includes a strip-shaped hole, the extension direction of which is perpendicular to the horizontal plane; the blade is movably installed in the motor compartment; the center of one end face of the eccentric wheel is installed to the power output shaft; its other end face is provided with an eccentric connecting rod, which can be slidably inserted into the strip-shaped hole; wherein, the motor drives the eccentric wheel to rotate, and drives the blade to translate through the eccentric connecting rod and the transmission block.

[0011] Furthermore, the floor brush assembly also includes two racks and a gear. The two racks are respectively mounted on a blade and are arranged opposite to each other. The gear is rotatably mounted in the motor compartment. The central axis of the gear is perpendicular to the bottom surface of the blade. The two racks mesh with the gear respectively. The extending direction of the two racks is consistent with the extending direction of the roller brush.

[0012] Furthermore, each blade includes a back and teeth that are opposite to each other; a rack is provided on the back of one blade and another rack is provided on the back of another blade.

[0013] Furthermore, the floor brush assembly also includes blade mounting holes, a first substrate, and a second substrate.

[0014] The blade mounting hole is formed between the top of a partition and the top surface of the floor brush shell; the first substrate is mounted to the bottom surface of the blade mounting hole; the second substrate is mounted to the top surface of the blade mounting hole; wherein, a receiving space is formed between the first substrate and the second substrate, and the two blades are respectively movably mounted into the receiving space.

[0015] Furthermore, each blade includes a back and teeth facing away from each other, the back being movably mounted into the blade mounting hole.

[0016] Furthermore, the floor brush assembly also includes a limiting hole and a guide post.

[0017] The limiting holes are formed on the back of the two blades, and the extending direction of the limiting holes is consistent with the axial direction of the roller brush; the guide post protrudes from the first substrate and extends toward the second substrate, and each guide post is inserted into a limiting hole on each blade back.

[0018] This application also provides a cleaning device, including the aforementioned floor brush assembly and a body, the body being mounted on the floor brush assembly.

[0019] This application provides a floor brush assembly and a cleaning device. The floor brush assembly is equipped with two blades, each blade including multiple spaced-apart teeth. Each tooth includes two opposing cutting edges, and each cutting edge includes a bottom, a middle, and a top connected in sequence. The middle part forms a concave portion. During the relative movement of the two blades, the cutting edges of the teeth in one blade and the cutting edges of the teeth in the other blade form a relatively closed cutting space. A groove is formed between two adjacent teeth on the same blade. At the same time, the hair located in the grooves of the two blades slides along the cutting edges of the teeth towards the concave portion and is cut by the cutting edges of the two blades, so that the hair is collected in the cutting space, preventing the hair from being pushed outward and improving the hair cutting efficiency. Driven by a motor, the two blades reciprocate along the roller brush axis. The movement directions of the two blades are always opposite, forming a high-frequency staggered cut on the hair wrapped around the roller brush, further improving the hair cutting efficiency of the cleaning device. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the floor brush assembly described in the embodiments of this application; Figure 2 This is a partial structural diagram of the floor brush component described in the embodiments of this application. Figure 1 ; Figure 3 This is a partial structural diagram of the floor brush component described in the embodiments of this application. Figure 2 ; Figure 4 This is a cross-section of the floor brush assembly described in the embodiments of this application. Figure 1 ; Figure 5 This is a cross-section of the floor brush assembly described in the embodiments of this application. Figure 2 ; Figure 6 This is a partial structural diagram of the floor brush component described in the embodiments of this application. Figure 3; Figure 7 This is an enlarged view of a portion of the blade structure of the floor brush assembly described in the embodiments of this application. Figure 1 ; Figure 8 This is an enlarged view of a portion of the blade structure of the floor brush assembly described in the embodiments of this application. Figure 2 ; Figure 9 This is an enlarged view of a portion of the blade structure of the floor brush assembly described in the embodiments of this application. Figure 3 ; Figure 10 This is a partial structural diagram of the floor brush component described in the embodiments of this application. Figure 4 .

[0022] Explanation of reference numerals in the attached figures: 100 floor brush assembly, 101 connecting part; 110 Floor brush housing, 111 Motor compartment, 112 Partition, 113 Roller brush compartment, 114 Dust suction port, 115 Blade mounting hole; 120 roller brush; 130 Blade, 131 Tooth, 132 Toothed edge, 133 Cutting space, 134 Bottom, 135 Middle, 136 Top, 137 Concave part, 138 Bottom surface; 140 motor, 141 power take-off shaft; 150 transmission block, 151 strip hole, 153 assembly plate; 160 eccentric wheel, 161 eccentric connecting rod; 170 Tooth groove, 171 Groove opening, 172 Groove bottom, 173 Opening, 174 Rack, 175 Gear, 176 C-shaped frame, 177 Bottom frame, 178 Back of blade; 180 First substrate, 181 Second substrate, 182 Accommodation space, 183 Guide post, 184 Limiting hole. Detailed Implementation

[0023] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "up," "down," "left," and "right" generally refer to up, down, left, and right in the actual use or working state of the device, specifically the drawing directions in the accompanying drawings.

[0024] As described in the background section, in existing cleaning equipment, the tooth groove opening between the blade teeth is larger than the bottom of the tooth groove. This tooth shape pushes outward any hair that is not cut off in time, causing the hair to become entangled at the base of the roller brush and unable to be cut, resulting in poor cutting effect. Moreover, most hair cutting solutions in cleaning equipment adopt a single-blade motion cutting method, but this method has low cutting efficiency, while a double-blade motion cutting method can achieve more efficient cutting.

[0025] In view of this, such as Figures 1-2 As shown, this application provides a cleaning device (not shown), including a floor brush assembly 100 and a body (not shown). The body (not shown) is mounted on the floor brush assembly 100 via a connecting part 101. The body (not shown) is equipped with a main motor (not shown), and a roller brush motor (not shown) is installed inside the roller brush 120. The main motor (not shown) provides a suction force, and the roller brush motor (not shown) drives the roller brush 120 to rotate. A pipe (not shown) is provided inside the body (not shown). One end of the roller brush 120 (not shown) is connected to the dust collection chamber (not shown) inside the body (not shown), and the other end is connected to the suction port 114 of the floor brush assembly 100. The double blades of the floor brush assembly 100 are located above the suction port 114. When the roller brush 120 is driven to rotate, the hair wrapped around the roller brush 120 is cut off when it passes through the double blades inside the floor brush assembly 100. The cut hair is sucked into the dust collection chamber (not shown) by the suction provided by the cleaning device motor (not shown) through the pipe (not shown) by the suction port 114.

[0026] like Figures 3-7 As shown, this application provides a floor brush assembly 100, including a floor brush housing 110, a roller brush 120, two stacked blades 130, a motor 140, a transmission block 150, and an eccentric wheel 160.

[0027] Each blade 130 includes a plurality of spaced-apart teeth 131 extending toward the roller brush 120; wherein, along the axial direction of the roller brush 120, each tooth 131 includes two opposing cutting edges 132; during the relative movement of the two blades 130, the cutting edges 132 of the teeth 131 in one blade 130 and the cutting edges 132 of the teeth 131 in the other blade 130 form a relatively enclosed cutting space 133.

[0028] like Figures 6-9As shown, each cutting tooth 131 includes a bottom 134, a middle part 135, and a top 136 connected in sequence, wherein the middle part 135 forms a concave portion 137; a tooth groove 170 is formed between two adjacent cutting teeth 131 on the same blade 130, and the width of the groove opening 171 and the width of the groove bottom 172 are both smaller than the distance between the two concave portions 137 in the middle of the tooth groove 170; wherein, when the two blades 130 are translated in opposite directions, the object to be cut located in the tooth groove 170 of the two blades 130 slides along the cutting edge 132 of the cutting tooth 131 toward the concave portion 137 and is cut by the cutting edge 131 of the two blades 130.

[0029] Furthermore, when the two blades 130 are relatively stationary, they are axially misaligned; when the two blades 130 move relative to each other, their translational directions are always opposite.

[0030] In this embodiment, the bottom surface 138 of the two stacked blades 130 in contact with each other is a plane. The surface to be cleaned of the cleaning device (not shown) is defined as a horizontal plane. The bottom surface 138 is parallel to the horizontal plane, and the projection surfaces of the tooth grooves 170 of the two blades 130 on the horizontal plane at least partially overlap.

[0031] In this embodiment, the tooth groove 170 of one blade 130 is composed of two different cutting edges 132 of the tooth groove 131, and the tooth groove 170 of the other blade 130 is also composed of two different cutting edges 132 of the tooth groove 131. One cutting edge 132 of the tooth groove 170 of one blade 130 and one cutting edge 132 of the tooth groove 170 of the other blade 130 form an opening 173. The opening 173 is formed by the top 136 of one cutting edge 132 of the tooth groove 170 of one blade 130 and the top 136 of one cutting edge 132 of the tooth groove 170 of the other blade 130, for accommodating the hair on the roller brush 120. The tooth groove 170 of one blade 130 and the tooth groove 170 of the other blade 130 are positioned opposite each other. During the operation, the opening 173 gradually closes. At this time, the top 136 of the tooth edge 132 of the groove 170 of one blade 130 contacts the top 136 of the tooth edge 132 of the groove 170 of another blade 130, and the bottom 134 of the tooth edge 132 of the groove 170 of one blade 130 contacts the bottom 134 of the tooth edge 132 of the groove 170 of another blade 130. This makes the tooth edge 132 of the blade 131 in one blade 130 and the tooth edge 132 of the blade 131 in another blade 130 form a relatively closed cutting space 133. This prevents hair that is not cut off in time from being pushed out of the opening 173, causing the hair to get tangled at the root of the roller brush and unable to be cut, resulting in poor cutting effect.

[0032] In this embodiment, when the two blades 130 are translated in opposite directions, the hair located in the tooth grooves 170 of the two blades 130 slides along the cutting edge 132 of the tooth 131 towards the concave portion 137. During the sliding process, the hair is cut by the cutting edge 131 of the two blades 130 until the cutting space 133 disappears. That is, one cutting edge 132 of the tooth groove 170 of one blade 130 completely overlaps with one cutting edge 132 of the tooth groove 170 of the other blade 130, so that all the hair in the cutting space 133 is cut, thereby improving the hair cutting efficiency.

[0033] In order to achieve relative motion between the two blades, that is, to make reciprocating motions in opposite directions along the axis of the roller brush, and to perform high-frequency staggered cutting of the hair on the roller brush, this application includes the following technical features.

[0034] like Figures 3-6 as well as Figure 10 As shown, the floor brush housing 110 includes a motor compartment 111 and a roller brush compartment 113 connected to each other, with a partition 112 forming between the roller brush compartment 113 and the motor compartment 111; the roller brush 120 is rotatably installed in the roller brush compartment 113; the partition 112 is provided with a dust suction port 114, and a blade mounting hole 115 is formed between the partition 112 and the top surface of the floor brush housing 110, with the blade mounting hole 115 located above the dust suction port 114; the motor 140 is installed in the motor compartment 111, and the motor 140 includes a power output shaft 141, the central axis of which is perpendicular to the bottom surface 138 of the blade 130; the transmission block 150 is fixed. A drive block 150 is mounted to a blade 130 via an assembly plate 153, which is formed on the back 178 of the blade 130. The drive block 150 includes a slotted hole 161, the extension direction of which is perpendicular to the horizontal plane. The center of one end face of the eccentric wheel 160 is mounted to the power output shaft 141. The other end face of the eccentric wheel 160 is provided with an eccentric connecting rod 161, which is slidably inserted into the slotted hole 151. The motor 140 drives the eccentric wheel 160 to rotate, and the blade 130 is translated via the eccentric connecting rod 161 and the drive block 150.

[0035] Furthermore, the floor brush assembly 100 also includes two racks 174 and a gear 175. The two racks 174 are respectively disposed on a blade 130 and are arranged opposite to each other. The gear 175 is rotatably installed in the motor compartment 111. The central axis of the gear 175 is perpendicular to the bottom surface 138 of the blade 130. The two racks 174 mesh with the gear 175 respectively. The extending direction of the two racks 174 is consistent with the extending direction of the roller brush 120. Specifically, a protruding C-shaped frame 176 is provided on a blade 130. The C-shaped frame 176 includes a bottom frame 177, and the bottom frame 177 is provided with a rack 174.

[0036] Furthermore, each blade 130 includes a back 178 and teeth 131 that are opposite to each other. The backs 178 of the two blades 130 are movably mounted into the blade mounting hole 115. A rack 174 is provided on the back 178 of one blade 130 and another rack 174 is provided on the back 178 of the other blade 130. Specifically, a protruding U-shaped frame 176 is provided on the back 178 of one blade 130. The U-shaped frame 176 includes a bottom frame 177 and a rack 174 is provided on the bottom frame 177.

[0037] Furthermore, the floor brush assembly 100 also includes a first substrate 180 and a second substrate 181.

[0038] The first substrate 180 is mounted to the bottom surface of the blade mounting hole 115; the second substrate 181 is mounted to the top surface of the blade mounting hole 115; wherein, a receiving space 182 is formed between the first substrate 180 and the second substrate 181, and the backs 137 of the two blades 130 are movably mounted in the receiving space 182. Specifically, the bottom surface of one blade 130 abuts against the top surface of the first substrate 180, the top surface of the blade 130 abuts against the bottom surface of the other blade 130, and the top surface of the other blade 130 abuts against the second substrate 181, thereby fixing the two blades 130 in the axial direction of the blade mounting hole 115.

[0039] Furthermore, the floor brush assembly 100 also includes a limiting hole 184 and a guide post 183.

[0040] Limiting holes 184 are formed on the backs 137 of the two blades 130, and the extension direction of the limiting holes 184 is consistent with the axial direction of the roller brush 120; guide posts 183 protrude from the first substrate 180 and extend toward the second substrate 181; each guide post 183 is inserted into a limiting hole 184 on each blade back, thereby fixing the two blades 130 in the direction of the central axis of the power output shaft 141 and ensuring the translation of the two blades 130 in the axial direction of the roller brush 120.

[0041] In this embodiment, the motor 140 drives the power output shaft 141 to rotate, the rotation of the power output shaft 141 drives the eccentric wheel 160 to rotate, and the rotation of the eccentric wheel 160 drives the transmission block 150 to reciprocate in the axial direction of the roller brush 120.

[0042] In the initial state, when the eccentric connecting rod 161 rotates 180° around the central axis of the eccentric wheel 160, the transmission block 150 moves towards the first end of the blade mounting hole 115. At this time, the transmission block 150 drives a blade 130 to move towards the first end of the blade mounting hole 115. When the blade 130 moves, it drives the gear 175 to rotate through the rack 174 on the blade 130. The rotation of the gear 175 drives another blade 130 to move towards the second end of the blade mounting hole 115 through the rack 174 on the other blade. When the eccentric connecting rod 161 rotates 360° around the central axis of the eccentric wheel 160 from 180°, the transmission block 150 moves towards the first end of the blade mounting hole 115. When the second end of the blade mounting hole 115 moves, the transmission block 150 drives a blade 130 to move toward the second end of the blade mounting hole 115. When the blade 130 moves, the rack 174 on the blade 130 drives the gear 175 to rotate. The rotation of the gear 175 drives the other blade 130 to move toward the first end of the blade mounting hole 115 through the rack 174 on the other blade. The repeated rotation of the eccentric wheel 160 causes the two blades 130 to perform horizontal reciprocating motion in opposite directions, so that the two blades 130 form a dynamic staggered cutting of the hair on the roller brush 120, which improves the hair cutting efficiency of the cleaning equipment (not shown).

[0043] This application provides a floor brush assembly and a cleaning device. The floor brush assembly is equipped with two blades, each blade including multiple spaced-apart teeth. Each tooth includes two opposing cutting edges, and each cutting edge includes a bottom, a middle, and a top connected in sequence. The middle part forms a concave portion. During the relative movement of the two blades, the cutting edges of the teeth in one blade and the cutting edges of the teeth in the other blade form a relatively closed cutting space. A groove is formed between two adjacent teeth on the same blade. At the same time, the hair located in the grooves of the two blades slides along the cutting edges of the teeth towards the concave portion and is cut by the cutting edges of the two blades, so that the hair is collected in the cutting space, preventing the hair from being pushed outward and improving the hair cutting efficiency. Driven by a motor, the two blades reciprocate along the roller brush axis. The movement directions of the two blades are always opposite, forming a high-frequency staggered cut on the hair wrapped around the roller brush, further improving the hair cutting efficiency of the cleaning device.

[0044] The above provides a detailed description of a floor brush component and cleaning equipment provided by this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A floor brush assembly characterized by, Comprising: a rolling brush; two stacked blades, each blade comprising a plurality of spaced apart blade teeth extending towards the rolling brush; wherein along the axial direction of the rolling brush, each blade tooth comprises two tooth edges facing away from each other; during relative movement of the two blades, the tooth edges of the blade teeth in one blade and the tooth edges of the blade teeth in the other blade form a relatively closed cutting space.

2. The floor brush assembly of claim 1, wherein each tooth edge comprises a base portion, a middle portion and a top portion connected in sequence, wherein the middle portion forms a concave portion; a tooth slot is formed between two adjacent blade teeth on the same blade, the width of the slot opening and the width of the slot bottom are both smaller than the distance between the two concave portions in the middle portion of the tooth slot; wherein when the two blades are translated in opposite directions, the object to be cut which is simultaneously located in the tooth slots of the two blades slides along the tooth edges of the blade teeth towards the concave portions and is cut by the tooth edges of the two blades.

3. The floor brush assembly of claim 1, wherein when the two blades are relatively stationary, the two blades are axially misaligned; when the two blades move relative to each other, the translation directions of the two blades are always opposite.

4. The brush assembly of claim 1, wherein, Further comprising a floor brush housing comprising a motor compartment and a rolling brush compartment; the rolling brush is rotatably mounted in the rolling brush compartment; a motor is mounted in the motor compartment, the motor comprises a power output shaft, the central axis of the power output shaft is perpendicular to the bottom surface of the blade; the blade is movably mounted in the motor compartment; a transmission block is fixed to a blade; the transmission block comprises a strip-shaped hole, the extension direction of the strip-shaped hole is perpendicular to the horizontal plane; and an eccentric wheel, one end surface of which is centrally mounted to the power output shaft; the other end surface is provided with an eccentric connecting rod which is slidably inserted into the strip-shaped hole; wherein the motor drives the eccentric wheel to rotate, and the blade is driven to translate by the eccentric connecting rod and the transmission block.

5. The brush assembly of claim 4, wherein, Further comprising two racks are respectively provided on one blade, and the two racks are oppositely arranged; a gear is rotatably mounted in the motor compartment, the central axis of the gear is perpendicular to the bottom surface of the blade, and the two racks are respectively engaged with the gear; the extension directions of the two racks are consistent with the extension direction of the rolling brush.

6. The floor brush assembly of claim 5, wherein each blade comprises a blade back and a blade tooth facing away from each other; one rack is provided on the blade back of one blade, and the other rack is provided on the blade back of the other blade.

7. The brush assembly of claim 4, wherein, Further comprising a blade mounting hole is formed between the top of a partition plate and the top surface of the floor brush housing; a first base plate is mounted to the bottom surface of the blade mounting hole; and a second base plate is mounted to the top surface of the blade mounting hole; wherein a receiving space is formed between the first base plate and the second base plate, and the two blades are respectively movably mounted in the receiving space.

8. The floor brush assembly of claim 7, wherein each blade comprises a blade back and a blade tooth facing away from each other, and the blade back is movably mounted in the blade mounting hole.

9. The brush assembly of claim 7, wherein, The floor brush assembly further comprises a limiting hole is formed in the blade back of the two blades, the extension direction of the limiting hole is consistent with the axial direction of the rolling brush; and A plurality of guide posts protrude from the first substrate and extend toward the second substrate. Each guide post is inserted into a limiting hole of each clearance.

10. A cleaning apparatus, comprising: a floor brush assembly according to any one of claims 1-9; and a body mounted to the floor brush assembly.

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