Nozzle and cleaner

Abstract

To restrain the generation of noise from a nozzle.SOLUTION: A nozzle comprises a main body comprising a lower surface opposed to a surface to be cleaned, a groove part 30 provided in the lower surface so as to be recessed upward from the lower surface, and a suction port 6 provided inside the groove part so as to be opposed to the surface to be cleaned. The groove part 30 includes a first groove part 31, and a second groove part 32 of which at least a portion is provided behind the first groove part 31. A depth H1 of the first groove part 31 is larger than a depth H2 of the second groove part 32.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The technology disclosed herein relates to nozzles and cleaners. [Background technology]

[0002] 2. Description of the Related Art In the technical field relating to cleaners, a floor suction nozzle as disclosed in Patent Document 1 is known. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Utility Model Application Publication No. 50-055351 Summary of the Invention [Problem to be solved by the invention]

[0004] When suction force is generated at the suction port of the nozzle, dust is sucked into the suction port together with air. The flow of air can cause noise from the nozzle. When noise is generated from the nozzle, it causes discomfort to the user of the cleaner and those around.

[0005] The technology disclosed in this specification aims to suppress noise generation from the nozzle. [Means for solving the problem]

[0006] This specification discloses a nozzle for a cleaner. The nozzle may include a body having a lower surface facing a surface to be cleaned, a groove provided on the lower surface so as to be recessed upward from the lower surface, and a suction port provided inside the groove so as to face the surface to be cleaned. The groove may include a first groove and a second groove, at least a portion of which is provided rearward of the first groove. A depth H1 of the first groove may be deeper than a depth H2 of the second groove. Effect of the Invention

[0007] According to the technology disclosed in this specification, noise generated from the nozzle is suppressed. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a perspective view showing a nozzle according to an embodiment, viewed from above and at the front. [Diagram 2] FIG. 2 is a perspective view showing the nozzle according to the embodiment, seen from below and behind. [Diagram 3] FIG. 3 is an exploded perspective view showing the nozzle according to the embodiment, seen from the lower rear. [Figure 4] FIG. 4 is a view of the nozzle according to the embodiment as viewed from below. [Diagram 5] FIG. 5 is a vertical cross-sectional view showing a nozzle according to an embodiment. [Figure 6] FIG. 6 is an enlarged view of a part of the nozzle according to the embodiment, seen from below. [Figure 7] FIG. 7 is a perspective view showing a part of the nozzle according to the embodiment, seen from the lower rear. [Figure 8] FIG. 8 is a perspective view showing a part of the nozzle according to the embodiment, seen from the lower front. [Figure 9] FIG. 9 is a vertical cross-sectional view showing a part of a nozzle according to an embodiment. [Figure 10] FIG. 10 is a perspective view showing a cleaner having a nozzle according to the embodiment. [Figure 11] FIG. 11 is a cross-sectional view showing the cleaner body according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] In one or more embodiments, the nozzle may include a body having a lower surface facing the surface to be cleaned, a groove provided in the lower surface so as to be recessed upward from the lower surface, and a suction port provided inside the groove so as to face the surface to be cleaned. The groove may include a first groove and a second groove, at least a portion of which is provided rearward of the first groove. A depth H1 of the first groove may be greater than a depth H2 of the second groove.

[0010] In the above configuration, by providing the first groove portion and the second groove portion on the lower surface of the main body, the flow velocity of the air sucked from the peripheral portion of the lower surface of the main body into the suction port is made uniform. That is, the space where the flow velocity of the air is locally high is reduced. Further, it is possible to suppress the air sucked from the suction port into the internal flow path of the main body from strongly hitting the inner wall surface of the internal flow path. Therefore, the generation of noise from the nozzle is suppressed.

[0011] In one or more embodiments, in the left-right direction, the center of the groove portion and the center of the main body may coincide.

[0012] In the above configuration, since the space where the flow velocity of the air is locally high is reduced, the generation of noise from the nozzle is suppressed.

[0013] In one or more embodiments, in the left-right direction, the center of the first groove portion and the center of the second groove portion may coincide.

[0014] In the above configuration, since the space where the flow velocity of the air is locally high is reduced, the generation of noise from the nozzle is suppressed.

[0015] In one or more embodiments, in the left-right direction, the dimension B1 of the first groove portion and the dimension B2 of the second groove portion may satisfy the condition of [B1 < B2].

[0016] In the above configuration, since the first groove portion is formed inside the second groove portion, the air flows smoothly from the peripheral portion of the lower surface of the main body toward the suction port. Therefore, the generation of noise from the nozzle is suppressed.

[0017] In one or more embodiments, in the left-right direction, the center of the suction port and the center of the groove portion may coincide.

[0018] In the above configuration, since the air flows smoothly toward the suction port, the generation of noise from the nozzle is suppressed.

[0019] In one or more embodiments, a front end of the inlet and a front end of the first groove may coincide, and a rear end of the inlet and a front end of the second groove may coincide.

[0020] In the above configuration, the first groove portion and the second groove portion are each divided into left and right portions by the single suction port. Air flows smoothly from the left and right ends of the lower surface of the main body toward the suction port, thereby suppressing noise generation from the nozzle.

[0021] In one or more embodiments, the center of the first groove and the center of the body in the left-right direction may coincide. A dimension B1 of the first groove in the left-right direction and a dimension Bt of the body in the left-right direction may satisfy the condition [B1≧0.5×Bt].

[0022] In the above configuration, the formation range of the first groove portion can cover the airflow concentration range, so noise generation from the nozzle is suppressed. The dimensions B1 and Bt may satisfy the condition [B1 ≧ 0.6 × Bt]. The dimensions B1 and Bt may satisfy the condition [B1 ≧ 0.5 × Bt] or may satisfy the condition [B1 ≧ 0.6 × Bt].

[0023] In one or more embodiments, a first width W1 indicating the dimension of the first groove portion in the front-rear direction and a depth H2 may satisfy the condition [W1≧H2].

[0024] In the above configuration, air from the front end of the underside of the main body is smoothly introduced into the first groove portion, thereby suppressing noise generation from the nozzle. Note that the first width W1 may satisfy the condition [W1 ≧ 3 mm].

[0025] In one or more embodiments, a first width W1 indicating the dimension of the first groove portion in the front-to-rear direction and a total width Wt indicating the sum of the dimension of the first groove portion and the dimension of the second groove portion in the front-to-rear direction may satisfy the condition [W1≦0.9×Wt].

[0026] In the above configuration, air from the left and right ends of the underside of the main body is smoothly introduced into the first groove, thereby suppressing noise generation from the nozzle. Note that, by satisfying the condition [W1 ≧ H2] and [W1 ≦ 0.9 × Wt] or the condition [W1 ≧ H2] and [W1 ≦ 0.9 × Wt], air from the peripheral part of the underside of the main body is smoothly introduced into the first groove, thereby effectively suppressing noise generation.

[0027] In one or more embodiments, a depth H3 indicating a difference between the depth H1 and the depth H2 may satisfy the condition [H3≧1.5 mm].

[0028] In the above configuration, the first groove portion is sufficiently deep relative to the second groove portion, so that noise is effectively suppressed. The upper limit of the depth H3 is not particularly limited, but may be, for example, 5.0 mm. In other words, the depth H3 may satisfy the condition [5.0 mm ≧ H3 ≧ 1.5 mm].

[0029] In one or more embodiments, the inner surface of the first groove portion may include a first rear surface connected to the front end of the second groove portion and facing forward, a first front surface disposed forward of the first rear surface and facing the first rear surface, and a first lower surface connecting an upper end of the first rear surface and an upper end of the first front surface. The nozzle may include a vertical rib at least a portion of which is provided on the first front surface so as to extend in the up-down direction. A plurality of vertical ribs may be arranged at intervals in the left-right direction.

[0030] In the above configuration, air from the front end of the lower surface of the main body passes between a pair of adjacent vertical ribs. The air is straightened by the vertical ribs. Also, a vertical vortex is generated between the pair of adjacent vertical ribs. This suppresses noise generation from the nozzle.

[0031] In one or more embodiments, of the multiple vertical ribs arranged in the left-right direction, the leftmost vertical rib is positioned to the left of the left end of the suction port, and the rightmost vertical rib is positioned to the right of the right end of the suction port.

[0032] In the above-described configuration, the range in which the vertical ribs are formed in the left-right direction is larger than the dimension of the suction port, whereby air that has been straightened by the vertical ribs is drawn into the suction port.

[0033] In one or more embodiments, a height T1 indicating the amount of protrusion of the longitudinal rib from the first front surface may satisfy the condition [T1≧1.5 mm].

[0034] In the above configuration, the height T1 is sufficiently high, so that the air flows sufficiently cleanly. The height T1 may satisfy the condition [T1≧2.0 mm]. The upper limit of the height T1 is not particularly limited, but may be, for example, 5.0 mm. That is, the height T1 may satisfy the condition [5.0 mm≧T1≧1.5 mm] or may satisfy the condition [5.0 mm≧T1≧2.0 mm].

[0035] In one or more embodiments, a thickness D1 indicating a dimension of the vertical rib in the left-right direction may satisfy the condition [D1≦3.0 mm].

[0036] In the above configuration, the thickness D1 is suppressed, so that the air can flow smoothly. The lower limit of the thickness D1 is not particularly limited, but may be, for example, 0.5 mm. In other words, the thickness D1 may satisfy the condition [0.5 mm≦D1≦3.0 mm].

[0037] In one or more embodiments, the distance G1 between a pair of vertical ribs adjacent to each other in the left-right direction may satisfy the condition [G1≦4.0 mm].

[0038] In the above configuration, a longitudinal vortex is appropriately generated between a pair of adjacent longitudinal ribs. The lower limit of the interval G1 may be, for example, 1.0 mm. That is, the interval G1 may satisfy the condition of [1.0 mm ≦ G1 ≦ 4.0 mm]. The interval G1 may satisfy the condition of [2.0 mm ≦ G1 ≦ 3.0 mm].

[0039] In one or more embodiments, the inner surface of the second groove portion may include a second lower surface connected to a lower end of the first rear surface, and a second rear surface connected to a rear end of the second lower surface and facing forward. The main body may have a left side surface arranged at the boundary between the second lower surface arranged to the left of the suction port and the left end of the suction port, and a right side surface arranged at the boundary between the second lower surface arranged to the right of the suction port and the right end of the suction port. The nozzle may include a lateral rib provided on each of the left side surface and the right side surface so as to extend in the up-down direction. A plurality of the lateral ribs may be arranged at intervals in the front-rear direction.

[0040] In the above configuration, air from the left end and the right end of the lower surface of the main body passes between a pair of adjacent horizontal ribs. The air is rectified by the horizontal ribs. In addition, vertical vortices are generated between the pair of adjacent horizontal ribs. This suppresses noise generation from the nozzle.

[0041] In one or more embodiments, the cleaner may include a nozzle as described above, a motor, and a fan rotated by the motor to generate suction at an inlet of the nozzle.

[0042] With the above configuration, the surface to be cleaned is cleaned while suppressing noise generation from the nozzle.

[0043] Hereinafter, an embodiment of the present disclosure will be described with reference to the drawings, but the present disclosure is not limited to the embodiment. The components of the embodiments described below can be appropriately combined. In addition, some components may not be used.

[0044] In the embodiment, the positional relationship of each part will be described using the terms "front", "rear", "upper", "lower", "left", and "right". These terms indicate relative positions or directions based on the center of the nozzle 1.

[0045] [nozzle] Fig. 1 is a perspective view of the nozzle 1 according to the embodiment from above and front. Fig. 2 is a perspective view of the nozzle 1 according to the embodiment from below and rear. Fig. 3 is an exploded perspective view of the nozzle 1 according to the embodiment from the lower rear. Fig. 4 is a view of the nozzle 1 according to the embodiment as seen from below. Fig. 5 is a vertical cross-sectional view of the nozzle 1 according to the embodiment.

[0046] The nozzle 1 comprises a main body 2 , a joint 3 , a connecting pipe 4 , and a shutter 5 .

[0047] The main body 2 has a suction port 6 and an internal flow path 7. The bottom surface 20 of the main body 2 faces the surface to be cleaned. The suction port 6 is provided on the bottom surface 20 of the main body 2. The suction port 6 faces downward. The main body 2 is long in the left-right direction. In the left-right direction, the suction port 6 is provided in the center of the main body 2. In the front-rear direction, the suction port 6 is provided in the front of the main body 2. The internal flow path 7 leads to the suction port 6. The suction port 6 sucks in dust present on the surface to be cleaned. The dust sucked in from the suction port 6 passes through the internal flow path 7.

[0048] The main body 2 includes a lower case 2A and an upper case 2B. The lower case 2A has an inlet 6. The lower surface 20 of the main body 2 includes the lower surface of the lower case 2A. The upper case 2B is disposed higher than the lower case 2A. The upper surface of the lower case 2A faces the lower surface of the upper case 2B. The lower case 2A and the upper case 2B are fixed together by a plurality of screws 8. An internal flow path 7 is provided in the upper case 2B.

[0049] The lower case 2A has a roller 9 and a wiper 10 that can contact the surface to be cleaned. The roller 9 rolls on the surface to be cleaned. A plurality of rollers 9 are provided. In the embodiment, the rollers 9 include a front roller 9A arranged in front of the suction port 6 and a rear roller 9B arranged behind the suction port 6. Two front rollers 9A are arranged in the left-right direction. Two rear rollers 9B are arranged in the left-right direction. The wiper 10 protrudes downward from the lower surface 20 of the main body 2 behind the suction port 6. The upper end of the wiper 10 is fixed to the lower case 2A. The lower end of the wiper 10 contacts the surface to be cleaned. The wiper 10 collects dust on the surface to be cleaned that the suction port 6 has not been able to completely suck. The suction port 6 can suck in the dust collected by the wiper 10.

[0050] The joint 3 is pipe-shaped. The joint 3 is connected to the rear of the main body 2. The joint 3 is disposed so as to protrude rearward from the rear of the main body 2. The joint 3 is rotatably connected to the main body 2. The rotation axis of the joint 3 extends in the left-right direction.

[0051] The front end of the connecting pipe 4 is inserted into the opening at the rear end of the joint 3. The rear end of the joint 3 and the connecting pipe 4 are fixed by a fixing mechanism 11.

[0052] The shutter 5 is rotatably connected to the main body 2. The shutter 5 is disposed so as to close the gap between the main body 2 and the joint 3. The shutter 5 can rotate together with the joint 3. The shutter 5 can rotate separately from the joint 3.

[0053] Fig. 6 is an enlarged view of a portion of the nozzle 1 according to the embodiment as viewed from below. Fig. 7 is a perspective view of a portion of the nozzle 1 according to the embodiment as viewed from the lower rear. Fig. 8 is a perspective view of a portion of the nozzle 1 according to the embodiment as viewed from the lower front. Fig. 9 is a vertical cross-sectional view of a portion of the nozzle 1 according to the embodiment.

[0054] The main body 2 has a groove portion 30 provided on the lower surface 20 so as to be recessed upward from the lower surface 20. The suction port 6 is provided inside the groove portion 30 so as to face the surface to be cleaned. The groove portion 30 includes a first groove portion 31 and a second groove portion 32. Each of the first groove portion 31 and the second groove portion 32 is long in the left-right direction. At least a portion of the second groove portion 32 is provided rearward of the first groove portion 31.

[0055] In the left-right direction, the center of the groove portion 30 coincides with the center of the main body 2. In the left-right direction, the center of the first groove portion 31 coincides with the center of the second groove portion 32.

[0056] In the left-right direction, the center of the suction port 6 and the center of the groove portion 30 coincide with each other. The front end of the suction port 6 coincides with the front end of the first groove portion 31. The rear end of the suction port 6 coincides with the front end of the second groove portion 32. In the embodiment, each of the first groove portion 31 and the second groove portion 32 is divided into left and right portions by the suction port 6. A part of the first groove portion 31 is disposed to the left of the suction port 6, and a part of the first groove portion 31 is disposed to the right of the suction port 6. A part of the second groove portion 32 is disposed to the left of the suction port 6, and a part of the second groove portion 32 is disposed to the right of the suction port 6.

[0057] The inner surface of the first groove portion 31 includes a first rear surface 21, a first front surface 22, a first lower surface 23, a first left surface 24L, a first right surface 24R, a first left inclined surface 25L, and a first right inclined surface 25R. The first rear surface 21 faces forward. The first rear surface 21 is connected to the front end of the second groove portion 32. The first front surface 22 is disposed forward of the first rear surface 21. The first front surface 22 faces rearward. The first front surface 22 faces the first rear surface 21 via a gap. The first lower surface 23 faces downward. The first lower surface 23 connects the upper end of the first rear surface 21 and the upper end of the first front surface 22. The front end of the first left surface 24L is connected to the left end of the first front surface 22 via the first left inclined surface 25L. The first left surface 24L faces rightward. The first left inclined surface 25L faces toward the right rear. The front end of the first left inclined surface 25L is connected to the left end of the first front surface 22. The rear end of the first left inclined surface 25L is connected to the front end of the first left surface 24L. The front end of the first right surface 24R is connected to the right end of the first front surface 22 via the first right inclined surface 25R. The first right surface 24R faces toward the left. The first right inclined surface 25R faces toward the left rear. The front end of the first right inclined surface 25R is connected to the right end of the first front surface 22. The rear end of the first right inclined surface 25R is connected to the front end of the first right surface 24R.

[0058] The inner surface of the second groove portion 32 includes a second lower surface 26, a second rear surface 27, a second left front surface 28L, a second right front surface 28R, a second left surface 29L, and a second right surface 29R. The second lower surface 26 faces downward. The front end of the second lower surface 26 is connected to the lower end of the first rear surface 21. The second rear surface 27 faces forward. The upper end of the second rear surface 27 is connected to the rear end of the second lower surface 26. The second left front surface 28L faces rearward. The second left front surface 28L is connected to the left end of the first left inclined surface 25L. The second right front surface 28R faces rearward. The second right front surface 28R is connected to the right end of the first right inclined surface 25R. The second left surface 29L is connected to the left end of the second lower surface 26. The second left surface 29L faces rightward. The second right surface 29R is connected to the right end of the second lower surface 26. The second right surface 29R faces leftward.

[0059] 9, the depth H1 of the first groove portion 31 is deeper than the depth H2 of the second groove portion 32. In the embodiment, the depth H1 refers to the distance between the first lower surface 23 and the lower surface 20 in the vertical direction. The depth H2 refers to the distance between the second lower surface 26 and the lower surface 20 in the vertical direction. The lower surface 20 refers to the plane that is closest to the surface to be cleaned in the lower case 2A of the main body 2. That is, the depth H1 of the first groove portion 31 and the depth H2 of the second groove portion 32 satisfy the condition of the following formula (1).

[0060] H1>H2 …(1)

[0061] 4, the dimension B1 of the first groove portion 31 in the left-right direction is smaller than the dimension B2 of the second groove portion 32 in the left-right direction. In other words, the dimension B1 of the first groove portion 31 in the left-right direction and the dimension B2 of the second groove portion 32 in the left-right direction satisfy the condition of the following formula (2).

[0062] B1 <B2 …(2)

[0063] The dimension Bt of the main body 2 in the left-right direction is larger than the dimension B2 of the second groove portion 32 in the left-right direction. In the left-right direction, the center of the first groove portion 31 and the center of the main body 2 coincide with each other, and the center of the second groove portion 32 and the center of the main body 2 coincide with each other. The dimension B1 of the first groove portion 31 in the left-right direction and the dimension Bt of the main body 2 in the left-right direction satisfy the condition of the following formula (3A). Note that the dimension B1 of the first groove portion 31 in the left-right direction and the dimension Bt of the main body 2 in the left-right direction may also satisfy the condition of the following formula (3B).

[0064] B1≧0.5×Bt …(3A) B1≧0.6×Bt …(3B)

[0065] As shown in FIG. 6, a first width W1 indicating the dimension of the first groove portion 31 in the front-rear direction and a second width W2 indicating the dimension of the second groove portion 32 in the front-rear direction are substantially equal. The first width W1 may be larger than the second width W2, or the first width W1 may be smaller than the second width W2. In the embodiment, the first width W1 refers to the dimension of the first groove portion 31 in the front-rear direction at a portion adjacent to the suction port 6. The first width W1 may be the minimum value of the dimension of the first groove portion 31 in the front-rear direction. The second width W2 refers to the dimension of the second groove portion 32 in the front-rear direction at a portion adjacent to the suction port 6. The second width W2 may be the minimum value of the dimension of the second groove portion 32 in the front-rear direction.

[0066] The first width W1 indicating the dimension of the first groove portion 31 in the front-rear direction and the depth H2 of the second groove portion 32 satisfy the condition of the following formula (4A). The first width W1 indicating the dimension of the first groove portion 31 in the front-rear direction may also satisfy the condition of the following formula (4B).

[0067] W1 ≧ H2 … (4A) W1≧3mm …(4B)

[0068] In an embodiment, when the sum of the dimensions of the first groove portion 31 and the second groove portion 32 in the front-to-rear direction is the total width Wt of the groove portion 30, the first width W1 of the first groove portion 31 and the total width Wt of the groove portion 30 satisfy the condition of the following equation (5).

[0069] W1≦0.9×Wt …(5)

[0070] A depth H3 indicating the difference between the depth H1 and the depth H2 satisfies the condition of the following formula (6).

[0071] H3≧1.5mm …(6)

[0072] The main body 2 has a left side surface 12L and a right side surface 12R connected to the first groove portion 31, a left side surface 13L and a right side surface 13R connected to the second groove portion 32, and a ceiling surface 14 of the internal flow path 7.

[0073] The left side surface 12L is disposed at the boundary between the first lower surface 23 disposed to the left of the suction port 6 and the left end of the suction port 6. The left side surface 12L faces to the right. The right end of the first lower surface 23 disposed to the left of the suction port 6 is connected to the lower end of the left side surface 12L. The right side surface 12R is disposed at the boundary between the first lower surface 23 disposed to the right of the suction port 6 and the right end of the suction port 6. The right side surface 12R faces to the left. The left end of the first lower surface 23 disposed to the right of the suction port 6 is connected to the lower end of the right side surface 12R.

[0074] The left side surface 13L is disposed at the boundary between the second lower surface 26 disposed to the left of the suction port 6 and the left end of the suction port 6. The left side surface 13L faces to the right. The right end of the second lower surface 26 disposed to the left of the suction port 6 is connected to the lower end of the left side surface 13L. The right side surface 13R is disposed at the boundary between the second lower surface 26 disposed to the right of the suction port 6 and the right end of the suction port 6. The right side surface 13R faces to the left. The left end of the second lower surface 26 disposed to the right of the suction port 6 is connected to the lower end of the right side surface 13R.

[0075] The main body 2 has a vertical rib 41, a horizontal rib 42, and a vertical rib 43. At least a portion of the vertical rib 41 is provided on the first front surface 22 of the first groove portion 31. The vertical rib 41 is provided to extend in the up-down direction. A plurality of the vertical ribs 41 are arranged at intervals in the left-right direction. The horizontal ribs 42 are provided on each of the left side surface 13L and the right side surface 13R. The horizontal ribs 42 are provided to extend in the up-down direction. A plurality of the horizontal ribs 42 are arranged at intervals in the front-rear direction. The vertical rib 43 is provided on the ceiling surface 14. The vertical rib 43 is provided to extend in the front-rear direction. A plurality of the vertical ribs 43 are arranged at intervals in the left-right direction.

[0076] The vertical rib 41 is provided so as to face the internal flow path 7. The vertical rib 41 is provided in the front part of the internal flow path 7. The vertical rib 41 is provided so as to protrude rearward from the first front surface 22. In the embodiment, the vertical rib 41 is provided not only on the first front surface 22 but also on the front wall surface of the internal flow path 7. The vertical rib 41 includes a vertical rib 41A provided on the lower case 2A and a vertical rib 41B provided on the upper case 2B.

[0077] The lateral rib 42 is provided so as to face the internal flow path 7. The lateral rib 42 is provided on each of the left and right parts of the internal flow path 7. At least a part of the lateral rib 42 is provided so as to protrude rightward from the left side surface 13L. At least a part of the lateral rib 42 is provided so as to protrude leftward from the right side surface 13R. The lateral rib 42 includes a lateral rib 42A provided on the lower case 2A and a lateral rib 42B provided on the upper case 2B.

[0078] The vertical rib 43 is provided so as to face the internal flow path 7. The vertical rib 43 is provided so as to protrude downward from the ceiling surface 14. The vertical rib 43 is provided on the upper case 2B. The vertical rib 43 is provided so as to be connected to the vertical rib 41.

[0079] Of the multiple vertical ribs 41 arranged in the left-right direction, the leftmost vertical rib 41 is arranged to the left of the left end of the suction port 6, and the rightmost vertical rib 41 is arranged to the right of the right end of the suction port 6. In other words, the formation range of the multiple vertical ribs 41 in the left-right direction is larger than the dimension of the suction port 6.

[0080] 6, the height T1 indicating the amount of protrusion of the vertical rib 41 from the first front surface 22 satisfies the condition of the following formula (7A). The height T1 indicating the amount of protrusion of the vertical rib 41 from the first front surface 22 may also satisfy the condition of the following formula (7B).

[0081] T1≧1.5mm …(7A) T1≧2.0mm …(7B)

[0082] A thickness D1 indicating the dimension of the vertical rib 41 in the left-right direction satisfies the condition of the following formula (8).

[0083] D1≦3.0mm …(8)

[0084] The distance G1 between a pair of adjacent vertical ribs 41 in the left-right direction satisfies the condition of the following formula (9A). The distance G1 between a pair of adjacent vertical ribs 41 in the left-right direction may also satisfy the condition of the following formula (9B).

[0085] G1≦4.0mm …(9A) 2.0mm≦G1≦3.0mm …(9B)

[0086] The height T2 of the transverse rib 42, which indicates the amount of protrusion from the left side surface 13L or the right side surface 13R, satisfies the condition of the following formula (10A). The height T1 of the transverse rib 42 may also satisfy the condition of the following formula (10B).

[0087] T2≧1.5mm …(10A) T2≧2.0mm …(10B)

[0088] A thickness D2 indicating the dimension of the horizontal rib 42 in the front-rear direction satisfies the condition of the following formula (11).

[0089] D1≦3.0mm …(11)

[0090] The distance G2 between a pair of lateral ribs 42 adjacent to each other in the front-rear direction satisfies the condition of the following formula (12A). Note that the distance G2 between the lateral ribs 42 may also satisfy the condition of the following formula (12B).

[0091] G2≦4.0mm …(12A) 2.0mm≦G2≦3.0mm …(12B)

[0092] [Cleaner] Fig. 10 is a perspective view showing a cleaner 50 having a nozzle 1 according to an embodiment. As shown in Fig. 10, the cleaner 50 has the nozzle 1, a cleaner body 51, and a pipe 52 connecting the nozzle 1 and the cleaner body 51. The cleaner body 51 has a handle 53 that is held by a user of the cleaner 50. The cleaner 50 is a handy cleaner that can perform cleaning work while the handle 53 is held by the user.

[0093] The nozzle 1 is connected to a cleaner body 51 via a connecting pipe 4. The connecting pipe 4 of the nozzle 1 is connected to one end of a pipe 52. The other end of the pipe 52 is connected to the cleaner body 51.

[0094] 11 is a cross-sectional view showing a cleaner body 51 according to an embodiment. As shown in Fig. 10 and Fig. 11, the cleaner body 51 has a housing 54, a motor 55 arranged inside the housing 54, a fan 56 arranged inside the housing 54, and a battery 57. The housing 54 includes a handle 53.

[0095] An intake port 58 is provided at the front end of the housing 54. An exhaust port 59 is provided at the side of the housing 54. The other end of the pipe 52 is inserted into the intake port 58.

[0096] The motor 55 is an inner rotor type brushless motor. The motor 55 generates power to rotate the fan 56. The motor 55 is driven by power supplied from a battery 57.

[0097] The fan 56 is disposed forward of the motor 55. The fan 56 is fixed to a rotor shaft of the motor 55. The fan 56 is rotated by the motor 55. The fan 56 generates a suction force at the suction port 6 of the nozzle 1. As the fan 56 rotates, a suction force is generated at the suction port 58 of the housing 54. As a result of the suction force being generated at the suction port 58 of the housing 54, a suction force is generated at the suction port 6 of the nozzle 1.

[0098] Suction force is generated at suction port 6 of nozzle 1, and dust on the surface to be cleaned is sucked together with air into suction port 6. The air flows through the internal flow path 7 of main body 2 and the internal flow path of joint 3, and then through the internal flow path of connecting pipe 4 and the internal flow path of pipe 52, before flowing into the internal space of housing 54 via suction port 58.

[0099] A filter 60 is disposed between the intake port 58 and the fan 56. The filter 60 collects dust contained in the air. The air that passes through the filter 60 flows into the fan 56 and is then discharged from the exhaust port 59.

[0100] [effect] As described above, according to the embodiment, the nozzle 1 includes a main body 2 having a lower surface 20 facing a surface to be cleaned, a groove portion 30 provided in the lower surface 20 so as to be recessed upward from the lower surface 20, and a suction port 6 provided inside the groove portion 30 so as to face the surface to be cleaned. The groove portion 30 includes a first groove portion 31 and a second groove portion 32 at least a portion of which is provided rearward of the first groove portion 31. The depth H1 of the first groove portion 31 is deeper than the depth H2 of the second groove portion 32.

[0101] In the above configuration, the first groove portion 31 and the second groove portion 32 are provided on the underside 20 of the main body 2, so that the flow speed of the air sucked from the peripheral portion of the underside 20 of the main body 2 into the suction port 6 is made uniform. That is, the space where the air flow speed is locally high is reduced. In addition, the air sucked from the suction port 6 into the internal flow path 7 of the main body 2 is prevented from strongly hitting the inner wall surface of the internal flow path 7. Therefore, the generation of noise from the nozzle 1 is suppressed.

[0102] In the embodiment, the center of the groove 30 and the center of the main body 2 coincide with each other in the left-right direction.

[0103] In the above configuration, the space where the air flow velocity is locally high is reduced, so that noise generated from the nozzle 1 is suppressed.

[0104] In the embodiment, the center of the first groove portion 31 and the center of the second groove portion 32 coincide with each other in the left-right direction.

[0105] In the above configuration, the space where the air flow velocity is locally high is reduced, so that noise generated from the nozzle 1 is suppressed.

[0106] In the embodiment, the dimension B1 of the first groove portion 31 in the left - right direction and the dimension B2 of the second groove portion 32 in the left - right direction satisfy the condition of [B1 < B2].

[0107] In the above configuration, since the first groove portion 31 is formed inside the second groove portion 32, air smoothly flows from the peripheral edge portion of the lower surface 20 of the main body 2 toward the suction port 6. Therefore, the generation of noise from the nozzle 1 is suppressed.

[0108] In the embodiment, in the left - right direction, the center of the suction port 6 and the center of the groove portion coincide.

[0109] In the above configuration, since air smoothly flows toward the suction port 6, the generation of noise from the nozzle 1 is suppressed.

[0110] In the embodiment, the front end portion of the suction port 6 and the front end portion of the first groove portion 31 coincide. The rear end portion of the suction port 6 and the front end portion of the second groove portion 32 coincide.

[0111] In the above configuration, by one suction port 6, each of the first groove portion 31 and the second groove portion 32 is divided into left and right. Since air smoothly flows from each of the left end portion and the right end portion of the lower surface 20 of the main body 2 toward the suction port 6, the generation of noise from the nozzle 1 is suppressed.

[0112] In the embodiment, in the left - right direction, the center of the first groove portion 31 and the center of the main body 2 coincide. The dimension B1 of the first groove portion 31 in the left - right direction and the dimension Bt of the main body 2 in the left - right direction satisfy the condition of [B1 ≥ 0.5×Bt].

[0113] In the above configuration, since the formation range of the first groove portion 31 can cover the air flow concentration range, the generation of noise from the nozzle 1 is suppressed. Note that the dimension B1 and the dimension Bt may satisfy the condition of [B1 ≥ 0.6×Bt]. The dimension B1 and the dimension Bt may satisfy the condition of [B1 ≥ 0.5×Bt], or may satisfy the condition of [B1 ≥ 0.6×Bt].

[0114] In the embodiment, the first width W1, which indicates the dimension of the first groove portion 31 in the front-rear direction, and the depth H2 satisfy the condition [W1≧H2].

[0115] In the above configuration, air from the front end of the lower surface 20 of the main body 2 is smoothly introduced into the first groove portion 31, thereby suppressing noise generation from the nozzle 1. The first width W1 may satisfy the condition [W1≧3 mm].

[0116] In the embodiment, the first width W1 indicating the dimension of the first groove portion 31 in the front-to-rear direction and the total width Wt indicating the sum of the dimension of the first groove portion 31 and the dimension of the second groove portion 32 in the front-to-rear direction satisfy the condition [W1≦0.9×Wt].

[0117] In the above configuration, air from the left and right ends of the underside 20 of the main body 2 is smoothly introduced into the first groove portion 31, thereby suppressing noise generation from the nozzle 1. Note that, by satisfying the condition [W1≧H2] and [W1≦0.9×Wt] or the condition [W1≧H2] and [W1≦0.9×Wt], air from the peripheral portion of the underside 20 of the main body 2 is smoothly introduced into the first groove portion 31, thereby effectively suppressing noise generation.

[0118] In this embodiment, the depth H3 indicating the difference between the depth H1 and the depth H2 satisfies the condition [H3≧1.5 mm].

[0119] In the above configuration, the first groove portion 31 is sufficiently deep relative to the second groove portion 32, so that noise is effectively suppressed. The upper limit of the depth H3 is not particularly limited, but may be, for example, 5.0 mm. In other words, the depth H3 may satisfy the condition [5.0 mm ≧ H3 ≧ 1.5 mm].

[0120] In the embodiment, the inner surface of the first groove portion 31 includes a first rear surface 21 that is connected to the front end of the second groove portion 32 and faces forward, a first front surface 22 that is disposed forward of the first rear surface 21 and faces the first rear surface 21, and a first lower surface 23 that connects an upper end of the first rear surface 21 to an upper end of the first front surface 22. The nozzle 1 includes a vertical rib 41 that is at least partially provided on the first front surface 22 so as to extend in the up-down direction. A plurality of vertical ribs 41 are arranged at intervals in the left-right direction.

[0121] In the above configuration, air from the front end of the lower surface 20 of the main body 2 passes between a pair of adjacent vertical ribs 41. The air is rectified by the vertical ribs 41. In addition, a vertical vortex is generated between the pair of adjacent vertical ribs 41. This suppresses noise generation from the nozzle 1.

[0122] In the embodiment, of the multiple vertical ribs 41 arranged in the left-right direction, the leftmost vertical rib 41 is arranged to the left of the left end of the suction port 6, and the rightmost vertical rib 41 is arranged to the right of the right end of the suction port 6.

[0123] In the above configuration, the range in the left-right direction in which the multiple vertical ribs 41 are formed is larger than the dimension of the suction port 6. As a result, the air that has been straightened by the vertical ribs 41 is sucked into the suction port 6.

[0124] In the embodiment, the height T1 indicating the amount of protrusion of the vertical rib 41 from the first front surface 22 satisfies the condition [T1≧1.5 mm].

[0125] In the above configuration, the height T1 is sufficiently high, so that the air flows sufficiently cleanly. The height T1 may satisfy the condition [T1≧2.0 mm]. The upper limit of the height T1 is not particularly limited, but may be, for example, 5.0 mm. That is, the height T1 may satisfy the condition [5.0 mm≧T1≧1.5 mm] or may satisfy the condition [5.0 mm≧T1≧2.0 mm].

[0126] In the embodiment, the thickness D1 indicating the dimension of the vertical rib 41 in the left-right direction satisfies the condition [D1≦3.0 mm].

[0127] In the above configuration, the thickness D1 is suppressed, so that the air can flow smoothly. The lower limit of the thickness D1 is not particularly limited, but may be, for example, 0.5 mm. In other words, the thickness D1 may satisfy the condition [0.5 mm≦D1≦3.0 mm].

[0128] In the embodiment, the interval G1 between a pair of vertical ribs 41 adjacent to each other in the left-right direction satisfies the condition [G1≦4.0 mm].

[0129] In the above configuration, a longitudinal vortex is appropriately generated between a pair of adjacent longitudinal ribs 41. The lower limit of the interval G1 may be, for example, 1.0 mm. That is, the interval G1 may satisfy the condition [1.0 mm ≦ G1 ≦ 4.0 mm]. The interval G1 may satisfy the condition [2.0 mm ≦ G1 ≦ 3.0 mm].

[0130] In the embodiment, the inner surface of the second groove portion 32 includes a second lower surface 26 connected to the lower end of the first rear surface 21, and a second rear surface 27 connected to the rear end of the second lower surface 26 and facing forward. The main body 2 has a left side surface 13L arranged at the boundary between the second lower surface 26 arranged to the left of the suction port 6 and the left end of the suction port 6, and a right side surface 13R arranged at the boundary between the second lower surface 26 arranged to the right of the suction port 6 and the right end of the suction port 6. The nozzle 1 includes a lateral rib 42 provided on each of the left side surface 13L and the right side surface 13R so as to extend in the up-down direction. A plurality of lateral ribs 42 are arranged at intervals in the front-rear direction.

[0131] In the above configuration, air from the left end and the right end of the lower surface 20 of the main body 2 passes between a pair of adjacent lateral ribs 42. The air is rectified by the lateral ribs 42. In addition, vertical vortices are generated between the pair of adjacent lateral ribs 42. This suppresses noise generation from the nozzle 1.

[0132] In this embodiment, the cleaner includes the nozzle 1, a motor 55, and a fan 56 that is rotated by the motor 55 to generate a suction force at the suction port 6 of the nozzle 1.

[0133] In the above-described configuration, the surface to be cleaned is cleaned while noise generation from the nozzle 1 is suppressed.

[0134] [Other embodiments] In the above embodiment, a plurality of rollers 9 are provided, but the number of rollers 9 may be one.

[0135] In the above-described embodiment, the lower case 2A and the upper case 2B may be integral with each other. [Explanation of symbols]

[0136] 1...Nozzle, 2...Main body, 2A...Lower case, 2B...Upper case, 3...Joint, 4...Connecting pipe, 5...Shutter, 6...Suction port, 7...Internal flow path, 8...Screw, 9...Roller, 9A...Front roller, 9B...Rear roller, 10...Wiper, 11...Fixing mechanism, 12L...Left side, 12R...Right side, 13L...left side, 13R...right side, 14...ceiling surface, 20...bottom surface, 21...first rear surface, 22...first front surface, 23...first bottom surface, 24L...first left surface, 24R...first right surface, 25L...first left slope, 25R...first right slope, 26...second bottom surface, 27...Second rear surface, 28L...Second left front surface, 28R...Second right front surface, 29L...Second left surface, 29R...Second right surface, 30...Groove, 31...First groove, 32...Second groove, 41...Vertical rib, 41A...Vertical rib, 41B...Vertical rib, 42...Horizontal rib, 42 A...horizontal rib, 42B...horizontal rib, 43...vertical rib, 50...cleaner, 51...cleaner body, 52...pipe, 53...handle, 54...housing, 55...motor, 56...fan, 57...battery, 58...suction port, 59...exhaust port, 60...filter, B1...dimension, B2...dimension, Bt...dimension, D1...thickness, D2...thickness, G1...spacing, G2...spacing, H1...depth, H2...depth, H3...depth, T1...height, T2...height, W1...first width, W2...second width, Wt...total width.

Claims

1. A main body having a lower surface facing the surface to be cleaned, a groove portion provided on the lower surface so as to be recessed upward from the lower surface, and a suction port provided inside the groove portion so as to face the surface to be cleaned, wherein the groove portion includes a first groove portion and a second groove portion at least a part of which is provided rearward of the first groove portion, and a depth H1 of the first groove portion is deeper than a depth H2 of the second groove portion, a nozzle.

2. In the left - right direction, a center of the groove portion and a center of the main body coincide with each other, the nozzle according to Claim 1.

3. In the left - right direction, a center of the first groove portion and a center of the second groove portion coincide with each other, the nozzle according to Claim 2.

4. A dimension B1 of the first groove portion in the left - right direction and a dimension B2 of the second groove portion in the left - right direction are such that B1 < B2 satisfies the condition of, the nozzle according to Claim 3.

5. In the left - right direction, a center of the suction port and a center of the groove portion coincide with each other, the nozzle according to Claim 3.

6. A front end portion of the suction port and a front end portion of the first groove portion coincide with each other, and a rear end portion of the suction port and a front end portion of the second groove portion coincide with each other, the nozzle according to Claim 5.

7. In the left - right direction, a center of the first groove portion and a center of the main body coincide with each other, and a dimension B1 of the first groove portion in the left - right direction and a dimension Bt of the main body in the left - right direction are such that B1 ≥ 0.5 × Bt satisfies the condition of, the nozzle according to Claim 2.

8. A first width W1 indicating a dimension of the first groove portion in the front - rear direction and the depth H2 are such that W1 ≥ H2 satisfies the condition of, the nozzle according to Claim 1.

9. A first width W1 indicating a dimension of the first groove portion in the front - rear direction and a total width Wt indicating a sum of the dimensions of the first groove portion and the second groove portion in the front - rear direction are such that W1 ≤ 0.9 × Wt satisfies the condition of, the nozzle according to Claim 8.

10. A depth H3 indicating a difference between the depth H1 and the depth H2 is such that H3 ≥ 1.5 mm satisfies the condition of, the nozzle according to Claim 1.

11. An inner surface of the first groove portion is connected to a front end portion of the second groove portion and includes a first rear surface facing forward, a first front surface disposed forward of the first rear surface and facing the first rear surface, and a first lower surface connecting an upper end portion of the first rear surface and an upper end portion of the first front surface, and includes vertical ribs provided at least partially on the first front surface so as to extend in the up - down direction, wherein the vertical ribs are arranged in a plurality at intervals in the left - right direction, the nozzle according to Claim 1.

12. Among the plurality of the vertical ribs arranged in the left - right direction, the left - most vertical rib is arranged to the left of the left end of the suction port, and the right - most vertical rib is arranged to the right of the right end of the suction port. The nozzle according to claim 11.

13. The height T1 indicating the protruding amount of the vertical rib from the first front surface satisfies the condition that T1≥1.5 mm and is the nozzle according to claim 11.

14. The thickness D1 indicating the dimension of the vertical rib in the left - right direction satisfies the condition that D1≤3.0 mm and is the nozzle according to claim 11.

15. The interval G1 between a pair of the vertical ribs adjacent to each other in the left - right direction satisfies the condition that G1≤4.0 mm and is the nozzle according to claim 11.

16. The inner surface of the second groove portion includes a second lower surface connected to the lower end portion of the first rear surface and a second rear surface connected to the rear end portion of the second lower surface and facing forward. The main body has a left side surface arranged at the boundary between the second lower surface arranged to the left of the suction port and the left end of the suction port, and a right side surface arranged at the boundary between the second lower surface arranged to the right of the suction port and the right end of the suction port. The main body is provided with horizontal ribs provided on each of the left side surface and the right side surface so as to extend in the up - down direction. A plurality of the horizontal ribs are arranged at intervals in the front - rear direction. The nozzle according to claim 11.

17. A cleaner comprising the nozzle according to claim 1, a motor, and a fan rotated by the motor to generate a suction force at the suction port of the nozzle.

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