Suction inlet part, suction inlet body, and electric vacuum cleaner

Abstract

The invention provides a suction inlet part which improves garbage collection performance at an end part of a rotary cleaning body, a suction inlet body with the suction inlet part, and an electric dust collector with the suction inlet part and the suction inlet body. The rotary cleaning body (11) is provided with: a main cleaning part (110); and a sub-cleaning part (111) disposed at an axial end. The sub-cleaning part (111) is provided with: a sub-cleaning part base part (1110); and a sub-cleaning member (1111) protruding from the sub-cleaning unit base (1110). The tip of the sub-cleaning member (1111) is located at different locations in the circumferential direction of the rotary cleaning body (11) multiple times over the entire configuration width (W) thereof.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to a suction inlet portion provided with a rotary cleaning body rotated by a motor, a suction inlet body provided with the same, and a motorized cleaner provided with them. BACKGROUND

[0002] Conventionally, a suction inlet body for a motorized cleaner is provided with a rotary cleaning body driven by a driving source such as a motor. The rotary cleaning body scrapes dust from the floor or scrapes out dust by rotation to assist suction cleaning. An auxiliary cleaning portion is provided near the end portion of the rotary cleaning body so as to act on the floor of a corner or the like of a room. For example, the base end portion of the cleaning portion is located at a certain position in the axial direction of the rotary cleaning body, and the tip end portion side is inclined at a certain angle with respect to the axial direction of the rotary cleaning body, so that when the suction inlet body is caused to travel on the floor, the cleaning portion can only linearly contact the floor. Therefore, it is desirable to provide a cleaning portion having improved garbage collection performance at the end portion of the rotary cleaning body.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT DOCUMENTS

[0005] Patent Document 1: Japanese Patent Application Publication No. H02-104322 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] The present application is to provide a suction inlet portion having improved garbage collection performance at the end portion of a rotary cleaning body, a suction inlet body provided with the same, and a motorized cleaner provided with them.

[0008] MEANS FOR SOLVING THE PROBLEMS

[0009] The suction inlet portion of the embodiment is provided with a motor, a rotary cleaning body, and a transmission portion that transmits the power of the motor to the rotary cleaning body to rotate the rotary cleaning body. The rotary cleaning body has a main cleaning portion and a sub cleaning portion disposed at the end portion in the axial direction. The sub cleaning portion is provided with a base portion and a cleaning member protruding from the base portion. The tip end portion of the cleaning member is located at different positions in the circumferential direction of the rotary cleaning body a plurality of times in the entire width of the disposition.

[0010] EFFECTS OF THE INVENTION: According to the suction inlet portion, the suction inlet body, and the motorized cleaner of the present application, garbage collection performance at the end portion of the rotary cleaning body is improved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 is a plan view of a rotary cleaning body of a suction inlet portion of one embodiment.

[0012] Figure 2is a perspective view showing the rotating cleaning body.

[0013] Figure 3 is an exploded perspective view showing a part of the rotating cleaning body.

[0014] Figure 4 is a plan view showing an end portion of the rotating cleaning body.

[0015] Figure 5 is a side view of the rotating cleaning body viewed from the axial direction.

[0016] Figure 6 is a plan view omitting a part of the suction inlet body having the suction inlet portion.

[0017] Figure 7 is a bottom view omitting a part of the suction inlet body.

[0018] Figure 8 is an exploded perspective view of a part of the suction inlet body.

[0019] Figure 9 is a perspective view of an example of the electric cleaner provided with the suction inlet body.

[0020] Explanation of reference numerals:

[0021] 1: suction inlet portion; 2: suction inlet body; 3: electric cleaner; 10: electric motor; 11: rotating cleaning body; 12: transmission portion; 110: main cleaning portion; 111: sub cleaning portion; 113: mounting portion; 114: cover portion; 1110: sub cleaning portion base as base portion; 1111: sub cleaning member as cleaning member; A: axial line; B: base portion; W: arrangement width. DETAILED DESCRIPTION

[0022] Hereinafter, one embodiment will be described with reference to the drawings.

[0023] In Figure 6 and Figure 7 , 1 indicates a suction inlet portion. The suction inlet portion 1 is provided with an electric motor 10, a rotating cleaning body 11, and a transmission portion 12, and is configured such that the power of the electric motor 10 is transmitted to the rotating cleaning body 11 through the transmission portion 12, whereby the rotating cleaning body 11 is rotationally driven. In the present embodiment, an example in which the suction inlet portion 1 is applied to the suction inlet body 2 shown in Figure 9 is shown. Hereinafter, the directions of front and back, left and right, and up and down are defined with reference to a state in which the suction inlet body 2 is used on a horizontal dusted portion. In the drawings, the arrow FR direction is set as the front direction, the arrow RR direction is set as the back direction, the arrow L direction is set as the left direction, the arrow R direction is set as the right direction, the arrow U direction is set as the up direction, and the arrow D direction is set as the down direction.

[0024] The suction inlet body 2 is also known as a floor brush, vacuum cleaner head, etc. For example... Figures 6 to 9 As shown, the suction inlet body 2 includes a housing 20. The housing 20 is formed of synthetic resin or the like, and in this embodiment, it is formed as a long strip in the left-right direction, i.e., horizontally elongated. A motor chamber 200 for housing the motor 10 and a rotating cleaning body chamber 201 for housing the rotating cleaning body 11 are formed in the housing 20. Furthermore, in this embodiment, a control chamber 202 for housing a control unit 13 that controls the operation of the motor 10 is formed in the housing 20. The control unit 13 may also have a function of switching between allowing / disallowing the operation of the motor 10 based on whether the suction inlet body 2 is in contact with the part being vacuumed. In the illustrated example, the control chamber 202 and the motor chamber 200 are arranged side-by-side, and the cleaning body chamber 201 is arranged adjacent to them in front of them, separated by a partition wall 203.

[0025] In this embodiment, the cleaning chamber 201 is located at the foremost part of the housing 20. The cleaning chamber 201 has an opening 2010 at its lower part, through which the entire lower part of the rotating cleaning body 11 is exposed and can contact the part being vacuumed. In the illustrated example, a front opening 2011 communicating with the opening 2010 is formed at the front of the cleaning chamber 201. The front opening 2011 is formed by cutting out the lower end of the front end portion of the cleaning chamber 201, which is part of the front wall of the housing 20, and extending it in the left-right direction.

[0026] Furthermore, a rotating cleaning body support portion 204 is formed in the housing 20, which houses the transfer portion 12 and supports the rotating cleaning body 11. The rotating cleaning body support portion 204 communicates with the motor chamber 200 and the cleaning body chamber 201. In this embodiment, the rotating cleaning body support portion 204 protrudes forward from the partition wall 203 between the motor chamber 200 and the control chamber 202. Therefore, cleaning body chambers 201 are respectively arranged on the left and right sides of the rotating cleaning body support portion 204, and the two sides of the rotating cleaning body support portion 204 open towards these cleaning body chambers 201. In the illustrated example, the rotating cleaning body support portion 204 is located between the cleaning body chambers 201, 201, and becomes a wall separating the cleaning body chambers 201, 201. It is not limited to this, and the rotating cleaning body support portion 204 may also protrude into the interior of a single cleaning body chamber 201 that is continuous in the left and right direction.

[0027] Further, in the present embodiment, a suction chamber 205 as a dust suction slot is formed in the housing 20. The suction chamber 205 is located below the control chamber 202 and the motor chamber 200, is adjacent to the rear portion of the cleaning body chamber 201 with the partition wall 203 interposed therebetween, and communicates with the cleaning body chamber 201 via a communication opening portion 2030 formed in the lower portion of the partition wall 203. A suction port 2050 is formed in the lower portion of the suction chamber 205. The suction port 2050 is formed in a slit shape extending along the left-right direction and having a small width in the front-rear direction. The suction port 2050 is continuous over the entire or substantially entire length of the rear portion of the cleaning body chamber 201. In the present embodiment, the cleaning body chamber 201 and the suction chamber 205 are formed as separate chambers, but are not limited thereto, and the cleaning body chamber 201 can function as the suction chamber, that is, the opening portion 2010 can function as the suction port, or the cleaning body chamber and the suction chamber 205 or the suction port 2050 can be partitioned inside one opening.

[0028] Further, a wiping portion 206 is provided in the rear portion of the suction chamber 205. The wiping portion 206 wipes and brushes off dust from the floor or the wooden floor or the like, which is a dusted portion, by contacting the dusted portion, and has a function of a sealing member that ensures the degree of vacuum of the suction port 2050. The wiping portion 206 is provided adjacent to or close to the rear portion of the suction port 2050, and has a long strip shape having a length above the suction port 2050 in the left-right direction. In the present embodiment, the wiping portion 206 is provided as a continuous wall between the end portions of the rotating cleaning body 11 or in a range covering both side portions of the housing 20. As the wiping portion 206, for example, a lint cloth or the like is used.

[0029] A connection pipe 21 is connected to the housing 20. The connection pipe 21, also referred to as a rotating pipe or the like, is connected so as to be rotatable with respect to the housing 20. The connection pipe 21 communicates the suction source with the suction port 2050 of the housing 20. The connection pipe 21 communicates with the suction chamber 205. The connection pipe 21 protrudes toward the upper side of the rear portion of the housing 20.

[0030] The motor 10 provided in the suction port portion 1 of the suction port body 2 protrudes from a motor main body portion 100 including a rotor and a stator, and the like, and is provided with an output shaft 101. The output shaft 101 is a rotation shaft of the motor 10 that rotates integrally with the rotor, and outputs power to the rotating cleaning body 11. In the present embodiment, the motor 10 is provided in the motor chamber 200 so that the output shaft 101 extends in the left-right direction. A pulley 102 is attached to the output shaft 101. The pulley 102 is, for example, an output gear in which a peripheral surface is formed in a gear tooth shape, and rotates integrally with the output shaft 101.

[0031] The transmission portion 12 is located in a direction intersecting the axial direction of the motor 10 or the output shaft 101 with respect to the motor 10. The transmission portion 12 is located in front of the motor 10 and is disposed in the rotary cleaning body support portion 204. The transmission portion 12 has a transmission portion main body portion 120. The transmission portion main body portion 120 is rotatably supported to the housing 20 in the rotary cleaning body support portion 204. The transmission portion main body portion 120 is, for example, a passive gear formed in a disc shape. A loop-shaped synchronous belt as a transmission member is wound between the transmission portion main body portion 120 and the pulley 102 of the motor 10, and the transmission portion 12 rotates in synchronization with the rotation of the output shaft 101 of the motor 10. A holding shaft portion 122 for holding the rotary cleaning body 11 is formed in the transmission portion main body portion 120. The holding shaft portion 122 is formed coaxially with the transmission portion main body portion 120, protrudes in the axial direction of the holding shaft portion 122, and extends into the cleaning body chamber 201. The axial direction of the holding shaft portion 122 is parallel or substantially parallel to the output shaft 101, and in the present embodiment, is the left-right direction. The rotary cleaning body 11 is held in the holding shaft portion 122, and the transmission portion 12 or the transmission portion main body portion 120 is disposed coaxially or substantially coaxially with the rotary cleaning body 11. In the present embodiment, the holding shaft portion 122 protrudes from both ends of the transmission portion main body portion 120, and the rotary cleaning body 11 is held by the holding shaft portions 122 via the locking mechanism. That is, in the illustrated example, the rotary cleaning bodies 11 are disposed in pairs with one transmission portion 12 as a reference, and are a cantilever support structure in which one end portion of each of the two rotary cleaning bodies 11 is supported, and are a structure in which the rotary cleaning bodies 11 rotate in the same direction integrally.

[0032] Further, the rotary cleaning body 11 driven by the motor 10 via the transmission portion 12 scrapes and / or scrapes out dust by rotation from the dust suction portion, thereby assisting in suction cleaning. As Figure 1 、 Figure 2 and Figure 6 The rotary cleaning body 11 has a main cleaning portion 110 and a sub cleaning portion 111 disposed at an end portion in the axial direction.

[0033] The main cleaning portion 110 constitutes a main cleaning range that occupies more than half of the cleaning range of the rotary cleaning body 11. The main cleaning portion 110 is provided to a cleaning body main portion 112. The cleaning body main portion 112 is a main cleaning portion support table on which the main cleaning portion 110 is mounted. The cleaning body main portion 112 is formed in a long cylindrical shape that is long in the axial direction, and is integrally mounted to the holding shaft portion 122 of the transmission portion 12. In the present embodiment, the holding shaft portion 122 of the transmission portion 12 is inserted into the inner periphery of the cleaning body main portion 112, and the rotary cleaning body 11 is held to the transmission portion 12. The axis of the cleaning body main portion 112 coincides or substantially coincides with the axis A of the rotary cleaning body 11. The end portion of the cleaning body main portion 112 on the side of the transmission portion 12 is disposed at a position at which the transmission portion 12 is close to or in contact with the transmission portion 12.

[0034] A main cleaning section 110 is arranged axially along the main body 112 of the cleaning body. The main cleaning section 110 has a cleaning range integrally between the two ends of the main body 112 along the axial direction. In this embodiment, the main cleaning section 110 is separate from the main body 112 and has a continuously formed main cleaning section base 1100 and main cleaning components 1101 such as brushes or scrapers that protrude from the main cleaning section base 1100 and can contact the dust-collecting part at least at their tip. The main cleaning section base 1100 is arranged axially on the outer peripheral surface of the main body 112, and the main cleaning components 1101 are continuously arranged in a wall-like manner between the two ends of the main body 112. In the illustrated example, the main cleaning section 110 is arranged in a twisted spiral shape in the circumferential direction of the main body 112. The main cleaning section 110 is arranged at intervals at multiple locations in the circumferential direction of the main body 112. For multiple main cleaning sections 110, they may be identical, or at least one main cleaning component 1101 of the main cleaning section 110 may be different from the main cleaning components 1101 of the remaining main cleaning sections 110. This is not a limitation; the base 1100 of the main cleaning section may also be integrally formed with the main body 112 of the cleaning body. Furthermore, the main cleaning section 110 may, for example, be configured to cover the entire outer peripheral surface of the main body 112 of the cleaning body.

[0035] like Figure 1 , Figure 3 as well as Figure 6 As shown, a secondary cleaning unit 111 is mounted on the end of the main cleaning body 112 via a mounting part 113. The mounting part 113, together with the main cleaning body 112, constitutes at least a part of the base part B. The secondary cleaning unit 111 constitutes the end of the cleaning range of the rotating cleaning body 11, i.e., the cleaning range of the corners. Compared with the main cleaning unit 110, the cleaning range of the secondary cleaning unit 111 is narrower in the left-right direction, and it has the function of mainly removing dust from the corners of the room and other areas that are being vacuumed. In this embodiment, the secondary cleaning unit 111 is disposed in the rotating cleaning body 11 at the end of the side not opposite to the transfer part 12, i.e., the other end of the rotating cleaning body 11, i.e., the free end side. In the illustrated example, the secondary cleaning units 111 are respectively disposed at the left end of the left side of the rotating cleaning body 11 and the right end of the right side of the rotating cleaning body 11. Therefore, the two secondary cleaning units 111 are located near the left and right edges of the housing 20 of the suction port 2.

[0036] The auxiliary cleaning unit 111 has an auxiliary cleaning unit base 1110 as a base, and a cleaning component, namely the auxiliary cleaning component 1111, which protrudes from the auxiliary cleaning unit base 1110 and can contact the part being vacuumed at least at its tip. The auxiliary cleaning unit 111 is configured by mounting the auxiliary cleaning unit base 1110 relative to the mounting portion 113 located at the end of the cleaning body main body 112.

[0037] The sub-sweeping portion base 1110 is formed of a member such as cloth having flexibility. The sub-sweeping portion base 1110 is preferably continuously formed. The sub-sweeping portion base 1110 has a fixed or substantially fixed width. In the illustrated example, the sub-sweeping portion base 1110 is formed in advance in a circular ring shape in a direction orthogonal or substantially orthogonal to the axial direction in a state where the sub-sweeping portion 111 is not attached to the attachment portion 113, that is, a natural state. The present application is not limited thereto, and the sub-sweeping portion base 1110 can be continuously formed in a straight line shape or the like in the natural state where the sub-sweeping portion 111 is not attached to the attachment portion 113, and can be made into a circular ring shape by being arranged in the attachment portion 113 so that both end portions are in close contact or close proximity.

[0038] The sub-sweeping member 1111 is formed of a member such as synthetic resin having elasticity. The base of the sub-sweeping member 1111 is integrated with the sub-sweeping portion base 1110, and the tip end portion protrudes in the radial direction from the sub-sweeping portion base 1110. The sub-sweeping member 1111 is arranged over the entire sub-sweeping portion base 1110. In the present embodiment, the sub-sweeping member 1111 is a bristle portion formed of a plurality of linear bristle portions implanted in the sub-sweeping portion base 1110, and in the drawing, a plurality of bristle bundles each having a cylindrical or truncated conical shape are arranged at equal intervals or substantially equal intervals in the sub-sweeping portion base 1110. The arrangement of the sub-sweeping member 1111 can be one row or a plurality of rows with respect to the width of the sub-sweeping portion base 1110. Further, the sub-sweeping member 1111 can not be implanted in the sub-sweeping portion base 1110 as a plurality of bristle bundles, but can be implanted as a single bristle.

[0039] The sub-sweeping member 1111 is preferably set to be less likely to be deformed than the main sweeping member 1101 by adjusting the material, the material, and the length, and the like.

[0040] Further, as Figure 1 , Figure 2 and Figure 4As shown, in a state where the main cleaning section 110 is attached to the attachment section 113, the main cleaning section 110 and the sub cleaning section 111 have their axes aligned or substantially aligned with each other, and the sub cleaning section member 1111 is formed in a circular ring shape that surrounds the axis A of the rotary cleaning body 11. Further, the position or locus of at least the tip end portion of the sub cleaning section member 1111 has a width in the axial direction (the left-right direction in the drawing) of the rotary cleaning body 11. Furthermore, the sub cleaning section member 1111 is distributed in a manner that the position or locus of the tip end portion thereof is repeatedly located at different portions in the circumferential direction of the rotary cleaning body 11 throughout the entire configuration width W. For example, at a plurality of phases within 360° in the circumferential direction of the rotary cleaning body 11, the position of the sub cleaning section member 1111 is the same in the axial direction of the rotary cleaning body 11, and the same position is distributed along the circumferential direction of the rotary cleaning body 11 at a plurality of portions from one end portion to the other end portion of the configuration width W of the sub cleaning section member 1111, preferably uniformly or substantially uniformly. For example, a plurality of sub cleaning section members 1111 each of which has at least the tip end portion located at one end portion of the configuration width W of the sub cleaning section member 1111, a plurality of sub cleaning section members 1111 each of which has at least the tip end portion located at the other end portion of the configuration width W of the sub cleaning section member 1111, and a plurality of sub cleaning section members 1111 each of which has at least the tip end portion located at an intermediate portion between the one end portion and the other end portion of the configuration width W of the sub cleaning section member 1111 are respectively provided.

[0041] In the present embodiment, the sub cleaning section member 1111 has its position in the axial direction of the rotary cleaning body 11 gradually or continuously changed in the circumferential direction so that at least the tip end portion traces a substantially back-and-forth meandering or zigzag-shaped locus between the one end portion and the other end portion of the configuration width W of the sub cleaning section member 1111 a plurality of times, for example, four times, per one revolution of the rotary cleaning body 11, but can be discontinuous in the circumferential direction. That is, the sub cleaning section member 1111 is configured so that the tip end portion thereof traces a locus of going back and forth across the configuration width W a plurality of times, four times in the present embodiment, per one revolution of the rotary cleaning body 11. Note that, hereinafter, the "locus" refers to a locus in a state where the sub cleaning section member 1111 is not in contact with the dust suction portion or the like.

[0042] In the illustrated example, the sub cleaning members 1111 are arranged so that the angle of inclination with respect to the axis perpendicular direction of the rotating cleaning body 11 gradually changes across the entire circumferential direction of the rotating cleaning body 11 in a manner that the closer to the end portion side of the rotating cleaning body 11 within the arrangement width W, the greater the inclination with respect to the axis perpendicular direction of the rotating cleaning body 11 toward the end portion side of the rotating cleaning body 11. Hereinafter, the inclination of the sub cleaning members 1111 is defined as the inclination of the central axis of the base end portion side of the bundle of hairs in the case where the plurality of sub cleaning members 1111 form a bundle of hairs. That is, in the case where the plurality of sub cleaning members 1111 form a bundle of hairs, each bundle forms a truncated cone shape, and the sub cleaning members 1111 sometimes spread radially from the sub cleaning member base 1110 side, that is, the base end portion toward the tip end portion, and thus the direction of the central axis of the base end portion of the bundle of hairs is defined as the direction of the sub cleaning members 1111. In the case where the sub cleaning members 1111 do not form a bundle of hairs each, the inclination of each sub cleaning member 1111 is taken as the inclination of the sub cleaning members 1111.

[0043] In the illustrated example, for the sub cleaning members 1111, the greater the inclination toward the left side in the drawing the further the tip end portion is located from the end portion side of the rotating cleaning body 11 in the axial direction of the rotating cleaning body 11. In addition, in the illustrated example, the sub cleaning members 1111 located at the position farthest from the end portion side of the rotating cleaning body 11 in the axial direction of the rotating cleaning body 11 are substantially not inclined with respect to the axis perpendicular direction of the rotating cleaning body 11, but can be slightly inclined toward the end portion side of the rotating cleaning body 11. Furthermore, the sub cleaning members 1111 are preferably substantially not inclined with respect to the axis perpendicular direction of the rotating cleaning body 11 toward the side opposite to the end portion side, but can be slightly inclined with respect to the axis perpendicular direction of the rotating cleaning body 11 toward the side opposite to the end portion side.

[0044] Furthermore, a part of the sub cleaning members 1111 are inclined with respect to the axis perpendicular direction of the rotating cleaning body 11, and the tip end portions thereof protrude from the end portion of the base portion B toward the axial direction of the rotating cleaning body 11. In the present embodiment, the sub cleaning members 1111 having the greatest inclination and the sub cleaning members 1111 located in the vicinity thereof in the circumferential direction of the rotating cleaning body 11 protrude from the end portion of the rotating cleaning body 11 toward the axial direction of the rotating cleaning body 11. Therefore, the portions of the tip end portions of the sub cleaning members 111 located on the end portion side of the axial direction of the rotating cleaning body 11 are located at different positions in the circumferential direction of the rotating cleaning body 11 multiple times. Furthermore, the portions of the tip end portions of the sub cleaning members 1111 protruding from the base portion B toward the axial direction of the rotating cleaning body 11 are located at different positions in the circumferential direction of the rotating cleaning body 11 multiple times.

[0045] Preferably, as Figure 5The sub cleaning members 1111 are arranged symmetrically with respect to the axis A of the rotating cleaning body 11. That is, the axial positions within the arrangement width W (shown in FIG. 1) of the sub cleaning members 11 and / or the inclinations with respect to the axial direction are equal or substantially equal to each other for the sub cleaning members 1111 located symmetrically with respect to the axis A. Figure 4 In the illustrated example, the sub cleaning members 1111 are arranged four times back and forth within the arrangement width W (shown in FIG. 1) of the rotating cleaning body 11 per one rotation of the rotating cleaning body 11, and thus the axial positions of the rotating cleaning body 11 within the arrangement width W (shown in FIG. 1) of the sub cleaning members 11 or the inclinations with respect to the axial direction are equal or substantially equal to each other for the sub cleaning members 1111 located at phases apart by 90° in the circumferential direction of the rotating cleaning body 11. Figure 4 In the illustrated example, the sub cleaning members 1111 are arranged four times back and forth within the arrangement width W (shown in FIG. 1) of the rotating cleaning body 11 per one rotation of the rotating cleaning body 11, and thus the axial positions of the rotating cleaning body 11 within the arrangement width W (shown in FIG. 1) of the sub cleaning members 11 or the inclinations with respect to the axial direction are equal or substantially equal to each other for the sub cleaning members 1111 located at phases apart by 90° in the circumferential direction of the rotating cleaning body 11. Figure 4 In the illustrated example, the sub cleaning members 1111 are arranged four times back and forth within the arrangement width W (shown in FIG. 1) of the rotating cleaning body 11 per one rotation of the rotating cleaning body 11, and thus the axial positions of the rotating cleaning body 11 within the arrangement width W (shown in FIG. 1) of the sub cleaning members 11 or the inclinations with respect to the axial direction are equal or substantially equal to each other for the sub cleaning members 1111 located at phases apart by 90° in the circumferential direction of the rotating cleaning body 11.

[0046] Figures 1 to 4 The arrangement and inclination of the above-described sub cleaning portion 111 are achieved by maintaining the sub cleaning portion 111 in the deformed state by restricting the position of the sub cleaning portion 111. In the present embodiment, the arrangement and inclination of the above-described sub cleaning portion 111 are achieved at least by the shape and / or configuration of the mounting portion 113 that mounts the sub cleaning portion 111.

[0047] The mounting portion 113 is a sub cleaning portion support table that mounts the sub cleaning portion 111, and in the present embodiment, functions as a separation preventing portion that prevents the main cleaning portion base 1100 of the main cleaning portion 110 from being separated in the axial direction with respect to the cleaning body main portion 112. The mounting portion 113 can be formed integrally with the cleaning body main portion 112, or can be formed separately from the cleaning body main portion 112 and mounted integrally. The mounting portion 113 is formed in a ring shape coaxial with the cleaning body main portion 112, and in the present embodiment, is formed in a circular ring shape. That is, the axis of the cleaning body main portion 112 coincides or substantially coincides with the axis of the mounting portion 113. The space portion on the inner side of the mounting portion 113 communicates with the space portion on the inner side of the cleaning body main portion 112. The diameter dimension of the mounting portion 113 is larger than the diameter dimension of the cleaning body main portion 112. The center portion of the mounting portion 113 is open, and a retaining wall portion 1130 that retains the inner periphery of the sub cleaning portion base 1110 is formed in the peripheral portion thereof. The retaining wall portion 1130 is formed in a cylindrical shape that is discontinuous or continuous in the circumferential direction.

[0048] Further, the mounting portion 113 is formed with a disposition receiving portion 1131 in the outer peripheral direction of the retaining wall portion 1130. The disposition receiving portion 1131 is a portion that exerts a force on the sub-sweeping portion 111 in a state where the sub-sweeping portion 111 is deformed along the axial direction and maintains the deformed state. The disposition receiving portion 1131 is formed in a circular ring shape that is continuous in the circumferential direction. The disposition receiving portion 1131 has portions in which the width in the axial direction is different in a plurality of places in the circumferential direction, and maintains a state where at least a portion of the sub-sweeping portion base portion 1110 and / or the sub-sweeping portion member 1111 is pressed along the axial direction. That is, due to the shape of the disposition receiving portion 1131, the sub-sweeping portion 111 is pressed in the axial direction of the rotary sweeping body 11, and thus the sub-sweeping portion member 1111 of the sub-sweeping portion 111 is inclined with respect to the axial direction of the rotary sweeping body 11.

[0049] For example, the disposition receiving portion 1131 has a plurality of first portions 11310 in which the width in the axial direction is large and second portions 11311 in which the width in the axial direction is small, alternately in the circumferential direction, and they are smoothly connected to each other. Thus, the disposition receiving portion 1131 is formed so that the leading end portion thereof is smoothly curved in a wavy shape that goes back and forth along the axial direction of the rotary sweeping body 11 a plurality of times when the rotary sweeping body 11 rotates one revolution. In the present embodiment, the disposition receiving portion 1131 is wavy so as to continuously go back and forth four times along the axial direction of the rotary sweeping body 11 when the rotary sweeping body 11 rotates one revolution. They are located at positions that are point-symmetrical or substantially point-symmetrical with respect to each other with respect to the axis of the mounting portion 113 or the axis A of the rotary sweeping body 11. Therefore, the disposition of the sub-sweeping portion member 1111 is point-symmetrical with respect to the axis A of the rotary sweeping body 11.

[0050] It is preferable that, on the mounting portion 113, a receiving portion 1132 that receives the end portion of the main sweeping portion 110 is formed in the disposition receiving portion 1131. The receiving portion 1132 extends, for example, along the axial direction from the end portion of the sweeping body main portion 112 side of the mounting portion 113. In the example shown in the drawing, the receiving portion 1132 is formed in a concave shape or a hole shape from the first portion 11310 of the disposition receiving portion 1131 to the retaining wall portion 1130. The receiving portion 1132 extends to a position that is further from the sweeping body main portion 112 side of the mounting portion 113 than the second portion 11311 of the disposition receiving portion 1131. Therefore, the end portion of the main sweeping portion 110 that is located in the receiving portion 1132 is located in a range (shown by an arrow OL) that overlaps with the disposition width W of the sub-sweeping portion member 1111 in the axial direction of the rotary sweeping body 11. In the present embodiment, the end portion side of the portion of the sub-sweeping portion member 1111 that is closest to the axial direction of the rotary sweeping body 11 or the range in which the inclination is the greatest, and the main sweeping portion member 1101 of the end portion of the main sweeping portion 110 that is located opposite in the axial direction of the rotary sweeping body 11, overlap with each other in the axial direction of the rotary sweeping body 11.

[0051] That is, only the end portion of the main cleaning member 1101 of the main cleaning section 110 of a part of the plurality of main cleaning sections 110 overlaps with the arrangement width W of the sub cleaning member 1111 in the axial direction of the rotary cleaning body 11, and for the end portion of the remaining other main cleaning sections 110, for example, the position of the end face of the cleaning body main section 112 side of the mounting section 113 is restricted.

[0052] In the present embodiment, the mounting section 113 has a holding groove section 1133 between the arrangement accepting section 1131 that forms the outer wall section of the holding groove section 1133 and the housing of the mounting section 113 and the holding wall section 1130 that forms the inner wall section of the holding groove section 1133. The holding groove section 1133 is recessed toward the axial direction of the mounting section 113 and is fitted with the sub cleaning section base 1110 of the sub cleaning section 111. This is not limited thereto, and the arrangement accepting section 1131 can also constitute the bottom of the holding groove section 1133.

[0053] Preferably, the rotary cleaning body 11 has a cover section 114. In this case, the cover section 114 forms a part of the base section B in the case where the rotary cleaning body 11 has the cover section 114. The cover section 114 covers the mounting section 113 from the axial direction to suppress the entanglement or entry of dust, and in the present embodiment, is held together with the mounting section 113 in a state of sandwiching and pressing at least a part of the sub cleaning section base 1110 and / or the sub cleaning member 1111 of the sub cleaning section 111 mounted to the arrangement accepting section 1131 or the holding groove section 1133 along the axial direction between the mounting section 113. The cover section 114 is arranged coaxially with the mounting section 113. The cover section 114 has a cover body section 1140 that covers the opening of the central portion of the mounting section 113. The cover body section 1140 is formed in a disc shape. In the present embodiment, the diameter dimension of the cover body section 1140 or the cover section 114 is set to be smaller than the diameter dimension of the mounting section 113.

[0054] Further, the cover section 114 is formed with a locking section 1141 for locking the cover section 114 with respect to the mounting section 113 or the cleaning body main section 112. In the present embodiment, the locking section 1141 protrudes toward the axial direction with respect to the cover body section 1140. The locking section 1142 is formed to be claw-fitted with respect to a locking accepting section 115 formed in the inside of the mounting section 113 or the inside of the cleaning body main section 112.

[0055] Further, in the lid portion 114, an opposing restriction portion 1142 is formed in the outer edge portion of the lid portion main body portion 1140. The opposing restriction portion 1142 opposes the arrangement receiving portion 1131 of the mounting portion 113 with a space in the axial direction in a state where the lid portion 114 is latched to the mounting portion 113 or the cleaning body main body portion 112. The opposing restriction portion 1142 has portions with different widths in the axial direction in the circumferential direction, and in the present embodiment, cooperates with the arrangement receiving portion 1131 to maintain a state of pressing at least a portion of the sub cleaning portion base 1110 and / or the sub cleaning portion member 1111 in the axial direction. For example, the opposing restriction portion 1142 alternately has a plurality of first portions 11420 with a large width in the axial direction and a plurality of second portions 11421 with a small width in the axial direction in the circumferential direction, and they are smoothly connected to each other. Thus, the opposing restriction portion 1142 is formed such that the leading end portion thereof is smoothly curved into a wavy shape that goes back and forth a plurality of times in the axial direction of the rotating cleaning body 11 when the rotating cleaning body 11 rotates one revolution. In the present embodiment, the first portions 11420 and the second portions 11421 of the opposing restriction portion 1142 and the second portions 11311 and the first portions 11310 of the arrangement receiving portion 1131 respectively oppose each other with a space in the axial direction, and the sub cleaning portion base 1110 and / or the sub cleaning portion member 1111 of the sub cleaning portion 111 is sandwiched therebetween in the axial direction, and the inclination of the sub cleaning portion member 1111 is set. That is, due to the shape of the opposing restriction portion 1142 or the lid portion 114 and the arrangement receiving portion 1131 or the mounting portion 113, the sub cleaning portion base 1110 and / or the sub cleaning portion member 1111 is sandwiched by the opposing restriction portion 1142 and the arrangement receiving portion 1131 in the axial direction of the rotating cleaning body 11, and thus the sub cleaning portion member 1111 is inclined with respect to the axial direction of the rotating cleaning body 11. For example, the space between the opposing restriction portion 1142 and the arrangement receiving portion 1131 is fixed or substantially fixed in the circumferential direction of the mounting portion 113 and / or the lid portion 114.

[0056] The opposing restriction portion 1142 is wavy in the same manner as the arrangement receiving portion 1131, and goes back and forth four times continuously in the axial direction of the rotating cleaning body 11 when the rotating cleaning body 11 rotates one revolution. They are located at positions that are point-symmetric or substantially point-symmetric with respect to each other with respect to the axis of the lid portion 114 or the axis A of the rotating cleaning body 11. Therefore, the arrangement of the sub cleaning portion member 1111 is point-symmetric with respect to the axis A of the rotating cleaning body 11.

[0057] Further, the above-described suction inlet body 2 is applied to Figure 9The electric cleaner 3 is shown. In the present embodiment, as an example of the electric cleaner 3, an example of a suction type electric cleaner 3 in which an electric blower 31 as a suction source is provided to a cleaner main body 30, and dust and air are sucked from a suction inlet body 2 to a separation section 32 by negative pressure generated by driving of the electric blower 31 is cited. The electric cleaner 3 can be any of a floor walking type, a horizontal type, a stick type, a vertical type, a hand-held type, or a self-propelled type electric cleaner, or the like. In the illustrated example, an example in which the electric cleaner 3 is a stick type electric cleaner is shown. In the illustrated example, the suction inlet body 2 is connected to the cleaner main body 30 mechanically and fluidly via a pipe body 33 such as an extension pipe, either indirectly or directly through a connection pipe 21. The operation of the electric blower 3 and the operation of the rotary cleaning body 11 or the electric motor 10 are set by the user by operating an operation switch 34. The operation switch 34 is provided to the cleaner main body 30 or a grip portion 35 for gripping the operation. Further, a main body control section 36 that causes the electric blower 31 to operate in accordance with the operation set by the operation switch 34 is provided to the cleaner main body 30. The main body control section 36 is electrically connected to the control section 13 of the suction inlet section 1. In addition, part or all of the functions of the control section 13 can also be concentrated in the main body control section 36. Furthermore, the electric cleaner 3 is provided with a power supply section 37. In the present embodiment, the power supply section 37 is a storage battery or a secondary battery, but is not limited thereto, and can be an AC-DC adapter, a reel device, or the like that acquires electric power from an external power source such as a commercial power source.

[0058] Next, the operation of one embodiment will be described.

[0059] During cleaning, the user grips the grip portion 35 and operates the operation switch 34, whereby the main body control section 36 causes the electric blower 31 to start, and in a state in which the suction inlet body 2 is placed on the cleaned portion, the control section 13 causes the rotary cleaning body 11 to start via the electric motor 10. Negative pressure generated by the operation of the electric blower 31 acts on the pipe body 33 and the suction inlet 2050 of the suction inlet body 2 via the separation section 32. The user moves the suction inlet body 2 on the cleaned portion back and forth by the grip portion 35, whereby dust on the cleaned portion is sequentially sucked into the separation section 32 via the suction inlet 2050, the connection pipe 21, and the pipe body 33 together with the air. Further, in conjunction with the rotation of the rotary cleaning body 11, the main cleaning member 1101 of the main cleaning section 110 and the sub cleaning member 1111 of the sub cleaning section 111 come into contact with the cleaned portion and scrape or wipe dust from the cleaned portion, which is sucked from the suction inlet 2050 located rearward thereof. Dust-containing air sucked into the separation section 32 is separated to capture dust in the separation section 32. Air from which dust has been separated is discharged to the outside of the cleaner main body 30 after cooling the electric blower 31.

[0060] The operation of the rotating cleaning body 11 will be described in more detail. The rotating cleaning body 11 rotates integrally with the transmission portion 12 by transmitting the rotation of the motor 10 via the transmission portion 12. Since the main cleaning portion 110, which occupies more than half of the length in the axial direction of the rotating cleaning body 11, is twisted in a helical shape in the circumferential direction, the main cleaning member 1101 of the main cleaning portion 110, which contacts the dusted portion, continuously contacts the dusted portion as the rotating cleaning body 11 rotates, and dust is removed from the dusted portion in the range in the left-right direction in which the main cleaning portion 110 is disposed. As for the sub cleaning portion 111, since the sub cleaning portion 111 is disposed close to both sides of the housing 20 of the suction inlet body 2, the sub cleaning member 1111 of the sub cleaning portion 111 contacts the dusted portion, for example, by carrying the side of the suction inlet body 2 to the dusted portion in a corner portion of a room or the like, and removes dust from the dusted portion in the vicinity of the corner portion.

[0061] At this time, since the tip portion of the sub cleaning member 1111 is located at different positions in the circumferential direction of the rotating cleaning body 11 a plurality of times for the entire range of the disposed width W, the sub cleaning member 1111 cleans the entire range from one end portion to the other end portion of the disposed width W a plurality of times for each rotation of the rotating cleaning body 11. Therefore, for example, compared to the conventional example in which the sub cleaning member cleans the same or substantially the same position in the axial direction of the rotating cleaning body 11, the garbage collection performance at the end portions of the rotating cleaning body 11 can be improved, and even if the sub cleaning member 1111 having a small resistance to the dusted portion is used, the garbage collection performance can be ensured. Thus, by the main cleaning portion 110, which mainly removes dust, and the sub cleaning portion 111, which removes dust from the end portions, good garbage collection performance can be obtained in a wide range of the disposed width, for example, the sub cleaning portion 111 can be caused to act on the dusted portion in the corner portion of the room or the like, where dust is easily accumulated, and the remaining amount can be reduced. Furthermore, by limiting the position of the sub cleaning portion 111 to maintain the sub cleaning member 1111 in a deformed state, the sub cleaning member 1111 is disposed in the entire disposed width W, and therefore, for example, compared to the conventional example in which the sub cleaning member is flattened to increase the disposed width, the contact resistance of the sub cleaning member 1111 to the dusted portion such as a carpet is reduced, the operability is good, and the current load of the motor 10 is small, and energy-saving operation can be performed.

[0062] Furthermore, in the present embodiment, the rotating cleaning body 11 cleans the same range in the disposed width W a plurality of times for each rotation by the sub cleaning member 1111, and therefore, the garbage collection performance can be further improved, and even if a part of the sub cleaning member 1111 is bent or damaged over time, the garbage collection performance is not significantly impaired.

[0063] Further, the sub cleaning member 1111 is arranged so that the angle of inclination with respect to the axis perpendicular direction of the rotating cleaning body 11 gradually changes over the entire circumferential direction of the rotating cleaning body 11 in a manner that the closer it is to the end portion side of the rotating cleaning body 11 within the arrangement width W, the greater the inclination with respect to the axis perpendicular direction of the rotating cleaning body 11 toward the end portion side of the rotating cleaning body 11. Therefore, the sub cleaning member 1111 traces an orbit that smoothly migrates and abuts in a manner that continuously reciprocates multiple times with respect to the dusted portion each time the rotating cleaning body 11 rotates one revolution. Therefore, the sub cleaning member 1111 can be brought into continuous and smooth contact with the dusted portion, and good dust collection performance can be achieved.

[0064] Further, a portion of the sub cleaning member 1111 is inclined with respect to the axis perpendicular direction of the rotating cleaning body 11, and the tip portion thereof protrudes from the end portion of the base portion B, and in this embodiment, from the mounting portion 113 and the cover portion 114, in the axis direction of the rotating cleaning body 11. Therefore, the range in which dust is removed by the sub cleaning member 1111 can be expanded in the axis direction of the rotating cleaning body 11, i.e., the left-right direction. Therefore, dust collection performance can be achieved up to the position of the edge of the side portion of the suction inlet body 2, and the sub cleaning member 111 can be caused to act on the dusted portion such as the corner of a room where dust is particularly likely to accumulate, and residual dust can be further suppressed.

[0065] Further, since the end portion of the main cleaning portion 110 overlaps with the arrangement width W of the sub cleaning member 111 in the axis direction of the rotating cleaning body 11, the cleaning range of the main cleaning portion 110 and the cleaning range of the sub cleaning member 111 overlap in the axis direction of the rotating cleaning body 11. Therefore, using one sub cleaning member 111, the gap between the main cleaning range of the main cleaning portion 110 and the cleaning range of the sub cleaning member 111 for the corner of the end portion can be filled, i.e., a range that cannot be cleaned between the main cleaning portion 110 and the sub cleaning member 111 in the axis direction of the rotating cleaning body 11 can be prevented, and good dust collection performance can be achieved.

[0066] At least a portion of the sub cleaning member 1111 is pressed in the axis direction of the rotating cleaning body 11 by the mounting portion 113, and as a result, at least a portion of the sub cleaning member 1111 is inclined with respect to the axis perpendicular direction of the rotating cleaning body 11. Therefore, not only can the sub cleaning member 1111 be restricted to a prescribed angle without being crushed, but also the angle of inclination of the sub cleaning member 1111 can be easily set according to the shape of the mounting portion 113 or the arrangement receiving portion 1131.

[0067] In particular, in the present embodiment, the cover portion 114 is provided in addition to the mounting portion 113, and the sub-sweeping portion 111 is sandwiched between the mounting portion 113 and the cover portion 114 in the axial direction of the rotating sweeping body 11. At least a part of the sub-sweeping member 1111 is inclined with respect to the axial direction of the rotating sweeping body 11 by the sandwiching of the mounting portion 113 and the cover portion 114. Therefore, the sub-sweeping member 1111 can be restricted at a predetermined angle without being crushed, and the inclination angle of the sub-sweeping member 1111 can be adjusted according to the degree of sandwiching by the mounting portion 113 and the cover portion 114. Furthermore, since the end portion of the mounting portion 113 is covered by the cover portion 114, it is difficult for hair to be entangled. Moreover, since the mounting portion 113, the sub-sweeping portion 111, and the cover portion 114 are located on the same or substantially the same axis, the configuration can be simplified compared to a configuration in which any of these is inclined.

[0068] Furthermore, the sub-sweeping member 1111 is arranged symmetrically with respect to the axis A of the rotating sweeping body 11. Therefore, the sub-sweeping member 1111 can sweep well with good balance as the rotating sweeping body 11 rotates.

[0069] Since the sub-sweeping portion 111 is arranged at the free end portion, i.e., the other end portion, of the rotating sweeping body 11 in the cantilever support configuration in which one end portion is supported, it is not necessary to provide a bearing portion or the like of the rotating sweeping body 11 on the side of the other end portion where the sub-sweeping portion 111 is arranged. Thus, the sub-sweeping portion 111 can be located as close as possible to the side portion of the suction inlet body 2, and the sub-sweeping portion 111 can act on the dusted portion, such as a corner of a room, where dust is particularly likely to accumulate. Therefore, the garbage collection performance can be further improved.

[0070] Furthermore, by providing the suction inlet body 2 with the above-described suction inlet portion 1, a suction inlet body 2 that can perform suction on a dusted portion, such as a corner of a room, can be realized. By providing the electric suction cleaner 3 with the suction inlet body 2, an electric suction cleaner 3 that has good suction performance can be realized.

[0071] In addition, in one embodiment, an example is shown in which the pair of rotating sweeping bodies 11 of the suction inlet portion 1 are cantilevered by the transmission portion 12, but the present application is not limited thereto. The configuration can be such that both end portions in the axial direction of one rotating sweeping body 11 are held by bearing portions on both side portions of the housing 20, and the central portion of the rotating sweeping body 11 is connected to the transmission portion 12. In this case, by providing the sub-sweeping portion 111 at both end portions of the sweeping body main portion 112 of the rotating sweeping body 11, the same effects as in the above-described one embodiment, such as improved garbage collection performance at the end portions of the rotating sweeping body 11, can be achieved.

[0072] Further, the suction port portion 1 can also be applied to a self-propelled electric cleaner 3 without a suction port body, such as a robot cleaner. In this case, the suction port portion 1 is disposed in place of the housing 20 on a cleaner main body or the like of the electric cleaner 3.

[0073] The embodiments of the present application have been described, which are suggested as examples, and are not intended to limit the scope of the application. These new embodiments can be implemented in other various ways, and various omissions, substitutions, and changes can be made within the scope of the gist of the application. These embodiments and modifications thereof are included in the scope and gist of the application, and are included in the application and the equivalent scope described in the scope of the patent claim.

Claims

1. A suction port portion characterized by comprising: Possessing: a motor; a rotating cleaning body; and a transmission portion that transmits power of the motor to the rotating cleaning body to rotate the rotating cleaning body, the rotating cleaning body has: a main cleaning portion; a sub cleaning portion disposed at an end portion in an axial direction, the sub cleaning portion has a base portion and a cleaning member protruding from the base portion, a tip end portion of the cleaning member is located at different positions in a circumferential direction of the rotating cleaning body multiple times.

2. A suction port portion characterized by Possessing: a motor; a rotating cleaning body; and a transmission portion that transmits power of the motor to the rotating cleaning body to rotate the rotating cleaning body, the rotating cleaning body has: a main cleaning portion; and a sub cleaning portion disposed at an end portion in an axial direction, the sub cleaning portion has a base portion and a cleaning member protruding from the base portion, a portion of the tip end portion of the cleaning member that is located on an end portion on an outer side of the axial direction of the rotating cleaning body is located at different positions in a circumferential direction of the rotating cleaning body multiple times.

3. A suction port portion characterized by Possessing: a motor; a rotating cleaning body; a transmission portion that transmits power of the motor to the rotating cleaning body to rotate the rotating cleaning body, the rotating cleaning body has: a main cleaning portion; a sub cleaning portion disposed at an end portion in an axial direction; and a base portion in which the main cleaning portion and the sub cleaning portion are disposed, the sub cleaning portion has a base portion and a cleaning member protruding from the base portion, a portion of the tip end portion of the cleaning member that protrudes from the base portion in the axial direction of the rotating cleaning body is located at different positions in a circumferential direction of the rotating cleaning body multiple times.

4. The suction port portion according to any one of claims 1 to 3, wherein the cleaning member is disposed so that the angle of inclination with respect to the axial direction of the rotating cleaning body toward the end portion side of the rotating cleaning body is gradually changed in the entire circumferential direction of the rotating cleaning body in a manner in which the closer to the end portion side of the rotating cleaning body within the disposition width, the greater the inclination.

5. The suction port portion according to claim 1 or 2, wherein the rotating cleaning body has a base portion in which the main cleaning portion and the sub cleaning portion are disposed, a portion of the cleaning member is inclined with respect to the axial direction of the rotating cleaning body, whereby the tip end portion thereof protrudes from the end portion of the base portion in the axial direction of the rotating cleaning body.

6. The suction port portion according to any one of claims 1 to 3, wherein in the axial direction of the rotating cleaning body, the end portion of the main cleaning portion is in a range that overlaps with the disposition width of the cleaning member.

7. The suction port portion according to any one of claims 1 to 3, wherein the rotating cleaning body has a mounting portion that mounts the base portion of the sub cleaning portion, at least a portion of the cleaning member is pressed by the mounting portion in the axial direction of the rotating cleaning body, whereby at least a portion of the cleaning member is inclined with respect to the axial direction of the rotating cleaning body.

8. The suction port portion according to any one of claims 1 to 3, wherein the rotating cleaning body has: a mounting portion that mounts the base portion of the sub cleaning portion; and a cover portion sandwiching the sub-sweeping portion along the axial direction of the rotating sweeping body between the mounting portion and the cover portion, at least a part of the sweeping member is inclined with respect to the axial direction of the rotating sweeping body by the sandwiching of the mounting portion and the cover portion.

9. The suction port portion according to any one of claims 1 to 3, characterized in that the sweeping member is arranged point-symmetrically with respect to the axis of the rotating sweeping body.

10. The suction port portion according to any one of claims 1 to 3, characterized in that the rotating sweeping body is of a cantilevered support structure with one end portion supported and the other end portion free, the sub-sweeping portion is arranged at the other end portion of the rotating sweeping body.

11. A suction port body characterized by comprising the suction port portion according to any one of claims 1 to 3.

12. An electric cleaner characterized by comprising the suction port body according to claim 11.

13. An electric cleaner characterized by comprising the suction port portion according to any one of claims 1 to 3. ​ ​ ​

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