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 in this specification relates to a nozzle and a cleaner.

Background Art

[0002] In the technical field related to cleaners, a floor suction tool (nozzle) as disclosed in Patent Document 1 is known.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems 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. There is a possibility that noise is generated from the nozzle due to the air flow. When noise is generated from the nozzle, it gives discomfort to the user of the cleaner and the people around.

[0005] The technology disclosed in this specification aims to suppress the generation of noise from the nozzle.

Means for Solving the Problems

[0006] This specification discloses a nozzle for a cleaner. The nozzle may include a main body having a lower surface facing the cleaning target surface, 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 cleaning target surface. The groove portion may include a first groove portion and a second groove portion at least a part of which is provided behind the first groove portion. The depth H1 of the first groove portion may be deeper than the depth H2 of the second groove portion.

Effects of the Invention

[0007] According to the technology disclosed herein, noise generation from the nozzle is suppressed. [Brief explanation of the drawing]

[0008] [Figure 1] Figure 1 is a front-upper perspective view showing a nozzle according to an embodiment. [Figure 2] Figure 2 is a rear-downward perspective view showing a nozzle according to the embodiment. [Figure 3] Figure 3 is an exploded perspective view from the lower rear showing the nozzle according to the embodiment. [Figure 4] Figure 4 is a view of the nozzle according to the embodiment, seen from below. [Figure 5] Figure 5 is a longitudinal cross-sectional view showing a nozzle according to the embodiment. [Figure 6] Figure 6 is an enlarged view of a part of the nozzle according to the embodiment, seen from below. [Figure 7] Figure 7 is a perspective view from below and behind showing a part of the nozzle according to the embodiment. [Figure 8] Figure 8 is a perspective view from below and in front showing a part of the nozzle according to the embodiment. [Figure 9] Figure 9 is a longitudinal cross-sectional view showing a part of the nozzle according to the embodiment. [Figure 10] Figure 10 is a perspective view showing a cleaner having a nozzle according to an embodiment. [Figure 11] Figure 11 is a cross-sectional view showing the cleaner body according to an embodiment. [Modes for carrying out the invention]

[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 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 be facing the surface to be cleaned. The groove may include a first groove and a second groove, at least a portion of which is provided behind the first groove. The depth H1 of the first groove may be deeper than the depth H2 of the second groove.

[0010] In the above configuration, since the first groove portion and the second groove portion are provided 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. Also, the air sucked from the suction port into the internal flow path of the main body is prevented 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 smoothly flows 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 smoothly flows toward the suction port, the generation of noise from the nozzle is suppressed.

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

[0020] In the above configuration, a single intake port divides the first groove and the second groove into left and right sections. Air flows smoothly from the left and right ends of the underside of the main body towards the intake port, thus suppressing noise generation from the nozzle.

[0021] In one or more embodiments, the center of the first groove and the center of the body may coincide in the left-right direction. The dimension B1 of the first groove in the left-right direction and the 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 can cover the airflow concentration range, thus suppressing noise generation from the nozzle. Note that dimensions B1 and Bt may satisfy the condition [B1≧0.6×Bt]. Dimensions B1 and Bt may satisfy either the condition [B1≧0.5×Bt] or the condition [B1≧0.6×Bt].

[0023] In one or more embodiments, the first width W1 and depth H2, which indicate the dimensions of the first groove in the front-rear direction, 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, thereby suppressing noise generation from the nozzle. The first width W1 may also satisfy the condition [W1≧3mm].

[0025] In one or more embodiments, the first width W1, which indicates the dimension of the first groove in the front-rear direction, and the total width Wt, which indicates the sum of the dimensions of the first groove and the second groove in the front-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 unit is smoothly introduced into the first groove, thereby suppressing noise generation from the nozzle. Furthermore, when the conditions [W1≧H2] and [W1≦0.9×Wt], or [W1≧H2] and [W1≦0.9×Wt] are satisfied, air from the peripheral edge of the underside of the main unit is smoothly introduced into the first groove, thereby effectively suppressing noise generation.

[0027] In one or more embodiments, the depth H3, which represents the difference between depth H1 and depth H2, may satisfy the condition [H3 ≥ 1.5 mm].

[0028] In the above configuration, the first groove is sufficiently deeper than the second groove, so noise is effectively suppressed. The upper limit of the depth H3 is not particularly limited, but it may be, for example, 5.0 mm. That is, 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 may include a first rear surface facing forward and connected to the front end of the second groove, a first front surface positioned forward of the first rear surface and facing the first rear surface, and a first lower surface connecting the upper end of the first rear surface and the upper end of the first front surface. The nozzle may include longitudinal ribs, at least a portion of which are provided on the first front surface so as to extend in the vertical direction. Multiple longitudinal ribs may be arranged at intervals in the left-right direction.

[0030] In the above configuration, air from the front end of the underside of the main body passes between a pair of adjacent longitudinal ribs. The airflow is straightened by the longitudinal ribs. Furthermore, longitudinal vortices are generated between the pairs of adjacent longitudinal ribs. This suppresses the generation of noise from the nozzle.

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

[0032] In the above configuration, the area where multiple longitudinal ribs are formed in the left-right direction is larger than the dimensions of the intake port. As a result, the air rectified by the longitudinal ribs is drawn into the intake port.

[0033] In one or more embodiments, the 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 the air flows through it cleanly. Note that the height T1 may satisfy the condition [T1 ≥ 2.0 mm]. The upper limit of the height T1 is not particularly limited, but it may be 5.0 mm, for example. That is, the height T1 may satisfy the condition [5.0 mm ≥ T1 ≥ 1.5 mm] or the condition [5.0 mm ≥ T1 ≥ 2.0 mm].

[0035] In one or more embodiments, the thickness D1 indicating the dimension of the longitudinal ribs in the left-right direction may satisfy the condition [D1 ≤ 3.0 mm].

[0036] In the above configuration, the air can flow smoothly because the thickness D1 is suppressed. The lower limit of the thickness D1 is not particularly limited, but it may be 0.5 mm, for example. That is, 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 longitudinal ribs adjacent to each other in the left-right direction may satisfy the condition [G1 ≤ 4.0 mm].

[0038] In the above configuration, longitudinal vortices are appropriately generated between pairs of mutually adjacent longitudinal ribs. The lower limit of the spacing G1 may be, for example, 1.0 mm. That is, the spacing G1 may satisfy the condition [1.0 mm ≤ G1 ≤ 4.0 mm]. The spacing G1 may also satisfy the condition [2.0 mm ≤ G1 ≤ 3.0 mm].

[0039] In one or more embodiments, the inner surface of the second groove may include a second lower surface connected to the lower end of the first rear surface, and a second rear surface connected to the rear end of the second lower surface and facing forward. The body may have a left side surface located at the boundary between the second lower surface located to the left of the suction port and the left end of the suction port, and a right side surface located at the boundary between the second lower surface located to the right of the suction port and the right end of the suction port. The nozzle may have transverse ribs provided on the left and right sides respectively, extending in the vertical direction. Multiple transverse ribs may be arranged at intervals in the front-rear direction.

[0040] In the above configuration, air from the left and right ends of the underside of the main body passes between a pair of adjacent transverse ribs. The airflow is straightened by the transverse ribs. In addition, longitudinal vortices are generated between the pairs of adjacent transverse ribs. This suppresses the generation of noise from the nozzle.

[0041] In one or more embodiments, the cleaner may include the nozzle described above, a motor, and a fan rotated by the motor to generate suction at the nozzle's suction port.

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

[0043] The embodiments of this disclosure will be described below with reference to the drawings, but this disclosure is not limited to these embodiments. The components of the embodiments described below can be combined as appropriate. In addition, some components may not be used.

[0044] In the embodiments, the terms "front," "rear," "up," "down," "left," and "right" are used to describe the positional relationships of each part. These terms indicate the relative position or direction with respect to the center of the nozzle 1.

[0045] [nozzle] Figure 1 is a front-upper perspective view showing the nozzle 1 according to the embodiment. Figure 2 is a rear-downper perspective view showing the nozzle 1 according to the embodiment. Figure 3 is an exploded perspective view showing the nozzle 1 according to the embodiment from the lower rear. Figure 4 is a view of the nozzle 1 according to the embodiment from below. Figure 5 is a longitudinal cross-sectional view showing 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 lower surface 20 of the main body 2 faces the surface to be cleaned. The suction port 6 is provided on the lower 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 located in the center of the main body 2. In the front-back direction, the suction port 6 is located at 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 a suction port 6. The lower surface 20 of the main body 2 includes the lower surface of the lower case 2A. The upper case 2B is positioned above the lower case 2A. The upper surface of the lower case 2A and the lower surface of the upper case 2B face each other. The lower case 2A and the upper case 2B are fixed together by a number of screws 8. An internal flow path 7 is provided in the upper case 2B.

[0049] The lower case 2A has rollers 9 and wipers 10 that can contact the surface to be cleaned. The rollers 9 roll on the surface to be cleaned. Multiple rollers 9 are provided. In this embodiment, the rollers 9 include front rollers 9A positioned in front of the suction port 6 and rear rollers 9B positioned 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 wipers 10 protrude downward from the lower surface 20 of the main body 2 behind the suction port 6. The upper end of the wipers 10 is fixed to the lower case 2A. The lower end of the wipers 10 contacts the surface to be cleaned. The wipers 10 collect dust from the surface to be cleaned that the suction port 6 could not suck up. The suction port 6 can suck up the dust collected by the wipers 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 positioned to protrude rearward from the rear of the main body 2. The joint 3 is rotatably connected to the main body 2. The pivot 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 together by the fixing mechanism 11.

[0052] The shutter 5 is rotatably connected to the main body 2. The shutter 5 is positioned 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 independently of the joint 3.

[0053] Figure 6 is an enlarged view of a portion of the nozzle 1 according to the embodiment, seen from below. Figure 7 is a perspective view from the lower rear showing a portion of the nozzle 1 according to the embodiment. Figure 8 is a perspective view from the lower front showing a portion of the nozzle 1 according to the embodiment. Figure 9 is a longitudinal cross-sectional view showing a portion of the nozzle 1 according to the embodiment.

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

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

[0056] In the left-right direction, the center of the suction port 6 and the center of the groove 30 coincide. The front end of the suction port 6 and the front end of the first groove 31 coincide. The rear end of the suction port 6 and the front end of the second groove 32 coincide. In this embodiment, the first groove 31 and the second groove 32 are each divided into left and right sections by the suction port 6. A portion of the first groove 31 is located to the left of the suction port 6, and a portion of the first groove 31 is located to the right of the suction port 6. A portion of the second groove 32 is located to the left of the suction port 6, and a portion of the second groove 32 is located to the right of the suction port 6.

[0057] The inner surface of the first groove 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 bevel 25L, and a first right bevel 25R. The first rear surface 21 faces forward. The first rear surface 21 is connected to the front end of the second groove 32. The first front surface 22 is positioned 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 through 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 bevel 25L. The first left surface 24L faces to the right. The first left slope 25L faces to the right rear. The front end of the first left slope 25L is connected to the left end of the first front surface 22. The rear end of the first left slope 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 slope 25R. The first right surface 24R faces to the left. The first right slope 25R faces to the left rear. The front end of the first right slope 25R is connected to the right end of the first front surface 22. The rear end of the first right slope 25R is connected to the front end of the first right surface 24R.

[0058] The inner surface of the second groove 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 slope 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 slope 25R. The second left surface 29L is connected to the left end of the second lower surface 26. The second left surface 29L faces to the right. The second right surface 29R is connected to the right end of the second lower surface 26. The second right surface 29R faces to the left.

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

[0060] H1 > H2 …(1)

[0061] As shown in Figure 4, the dimension B1 of the first groove 31 in the left-right direction is smaller than the dimension B2 of the second groove 32 in the left-right direction. That is, the dimension B1 of the first groove 31 in the left-right direction and the dimension B2 of the second groove 32 in the left-right direction satisfy the following condition (2).

[0062] B1 <B2 …(2)

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

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

[0065] As shown in Figure 6, the first width W1, which represents the dimension of the first groove 31 in the front-rear direction, and the second width W2, which represents the dimension of the second groove 32 in the front-rear direction, are substantially equal. Note that 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 this embodiment, the first width W1 refers to the front-rear dimension of the portion of the first groove 31 adjacent to the suction port 6. Note that the first width W1 may also be the minimum value of the front-rear dimension of the first groove 31. The second width W2 refers to the front-rear dimension of the portion of the second groove 32 adjacent to the suction port 6. Note that the second width W2 may also be the minimum value of the front-rear dimension of the second groove 32.

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

[0067] W1≧H2 …(4A) W1 ≥ 3mm …(4B)

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

[0069] W1 ≤ 0.9 × Wt …(5)

[0070] The depth H3, which represents the difference between depth H1 and depth H2, satisfies the following condition (6).

[0071] H3 ≥ 1.5 mm …(6)

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

[0073] The left side surface 12L is located at the boundary between the first lower surface 23, which is positioned 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, which is positioned 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 located at the boundary between the first lower surface 23, which is positioned 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, which is positioned 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 located at the boundary between the second lower surface 26, which is positioned 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, which is positioned 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 located at the boundary between the second lower surface 26, which is positioned 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, which is positioned 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 vertical ribs 41, horizontal ribs 42, and vertical ribs 43. At least a portion of the vertical ribs 41 is provided on the first front surface 22 of the first groove 31. The vertical ribs 41 are provided so as to extend in the vertical direction. Multiple vertical ribs 41 are arranged at intervals in the left-right direction. Horizontal ribs 42 are provided on the left side surface 13L and the right side surface 13R, respectively. The horizontal ribs 42 are provided so as to extend in the vertical direction. Multiple horizontal ribs 42 are arranged at intervals in the front-rear direction. Vertical ribs 43 are provided on the ceiling surface 14. The vertical ribs 43 are provided so as to extend in the front-rear direction. Multiple vertical ribs 43 are provided at intervals in the left-right direction.

[0076] The vertical ribs 41 are provided so as to face the internal flow path 7. The vertical ribs 41 are provided at the front of the internal flow path 7. The vertical ribs 41 are provided so as to protrude rearward from the first front surface 22. In this embodiment, the vertical ribs 41 are provided not only on the first front surface 22 but also on the front wall surface of the internal flow path 7. The vertical ribs 41 include vertical ribs 41A provided on the lower case 2A and vertical ribs 41B provided on the upper case 2B.

[0077] The transverse ribs 42 are provided so as to face the internal flow path 7. The transverse ribs 42 are provided on the left and right sides of the internal flow path 7, respectively. At least a portion of the transverse ribs 42 is provided so as to project to the right from the left side surface 13L. At least a portion of the transverse ribs 42 is provided so as to project to the left from the right side surface 13R. The transverse ribs 42 include transverse ribs 42A provided on the lower case 2A and transverse ribs 42B provided on the upper case 2B.

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

[0079] Of the multiple vertical ribs 41 arranged in the left-right direction, the leftmost vertical rib 41 is positioned to the left of the left end of the suction port 6, and the rightmost vertical rib 41 is positioned to the right of the right end of the suction port 6. In other words, in the left-right direction, the area in which the multiple vertical ribs 41 are formed is larger than the dimensions of the suction port 6.

[0080] As shown in Figure 6, the height T1 indicating the amount of protrusion of the longitudinal rib 41 from the first front surface 22 satisfies the following condition of equation (7A). Alternatively, the height T1 indicating the amount of protrusion of the longitudinal rib 41 from the first front surface 22 may also satisfy the following condition of equation (7B).

[0081] T1 ≥ 1.5 mm …(7A) T1 ≥ 2.0 mm …(7B)

[0082] The thickness D1, which indicates the dimension of the longitudinal rib 41 in the left-right direction, satisfies the following condition (8).

[0083] D1 ≤ 3.0 mm …(8)

[0084] The spacing G1 between a pair of adjacent longitudinal ribs 41 in the left-right direction satisfies the condition of equation (9A) below. Alternatively, the spacing G1 between a pair of adjacent longitudinal ribs 41 in the left-right direction may also satisfy the condition of equation (9B) below.

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

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

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

[0088] The thickness D2, which indicates the dimension of the transverse rib 42 in the front-rear direction, satisfies the following condition (11).

[0089] D1 ≤ 3.0 mm …(11)

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

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

[0092] [Cleaner] Figure 10 is a perspective view showing a cleaner 50 having a nozzle 1 according to an embodiment. As shown in Figure 10, the cleaner 50 has a 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 the user of the cleaner 50. The cleaner 50 is a handheld cleaner that can perform cleaning work while the user holds the handle 53.

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

[0094] Figure 11 is a cross-sectional view showing a cleaner body 51 according to an embodiment. As shown in Figures 10 and 11, the cleaner body 51 includes a housing 54, a motor 55 located inside the housing 54, a fan 56 located 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 on the side of the housing 54. The other end of the pipe 52 is inserted into the intake port 58.

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

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

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

[0099] A filter 60 is positioned between the intake port 58 and the fan 56. The filter 60 collects dust particles in the air. After passing through the filter 60, the air 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 comprises a main body 2 having a lower surface 20 facing the surface to be cleaned, a groove 30 provided on the lower surface 20 so as to be recessed upward from the lower surface 20, and a suction port 6 provided inside the groove 30 so as to be facing the surface to be cleaned. The groove 30 includes a first groove 31 and a second groove 32, at least a portion of which is provided behind the first groove 31. The depth H1 of the first groove 31 is deeper than the depth H2 of the second groove 32.

[0101] In the above configuration, the provision of a first groove 31 and a second groove 32 on the lower surface 20 of the main body 2 equalizes the airflow velocity of the air drawn in from the periphery of the lower surface 20 of the main body 2 to the intake port 6. In other words, the area where the airflow velocity is locally high is reduced. Furthermore, the strong impact of the air drawn in from the intake port 6 into the internal flow path 7 of the main body 2 on the inner wall surface of the internal flow path 7 is suppressed. Consequently, the generation of noise from the nozzle 1 is suppressed.

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

[0103] In the above configuration, the area where the airflow velocity is locally high is reduced, thus suppressing the generation of noise from nozzle 1.

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

[0105] In the above configuration, the area where the airflow velocity is locally high is reduced, thus suppressing the generation of noise from nozzle 1.

[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, each of the first groove portion 31 and the second groove portion 32 is divided into left and right by one suction port 6. 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 airflow 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 this embodiment, the first width W1 and depth H2, which represent the dimensions of the first groove 31 in the front-rear direction, 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 31, thereby suppressing the generation of noise from the nozzle 1. The first width W1 may satisfy the condition [W1≧3mm].

[0116] In this embodiment, the first width W1, which represents the dimension of the first groove 31 in the front-rear direction, and the total width Wt, which represents the sum of the dimension of the first groove 31 and the dimension of the second groove 32 in the front-rear direction, satisfy the condition [W1 ≤ 0.9 × Wt].

[0117] In the above configuration, air from the left and right ends of the lower surface 20 of the main body 2 is smoothly introduced into the first groove 31, thereby suppressing noise generation from the nozzle 1. Furthermore, when the conditions [W1≧H2] and [W1≦0.9×Wt], or [W1≧H2] and [W1≦0.9×Wt] are satisfied, air from the peripheral edge of the lower surface 20 of the main body 2 is smoothly introduced into the first groove 31, thereby effectively suppressing noise generation.

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

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

[0120] In this embodiment, the inner surface of the first groove 31 includes a first rear surface 21 facing forward and connected to the front end of the second groove 32, a first front surface 22 positioned forward of the first rear surface 21 and facing the first rear surface 21, and a first lower surface 23 connecting the upper end of the first rear surface 21 and the upper end of the first front surface 22. The nozzle 1 includes longitudinal ribs 41 that extend in the vertical direction and are provided on the first front surface 22, at least in part. Multiple longitudinal 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 longitudinal ribs 41. The air is rectified by the longitudinal ribs 41. In addition, longitudinal vortices are generated between the pair of adjacent longitudinal ribs 41. This suppresses the generation of noise from the nozzle 1.

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

[0123] In the above configuration, the area where the multiple vertical ribs 41 are formed is larger than the dimensions of the intake port 6 in the left-right direction. As a result, the air rectified by the vertical ribs 41 is drawn into the intake port 6.

[0124] In this embodiment, the height T1 representing the amount of protrusion of the longitudinal 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 the air flows through it cleanly. Note that the height T1 may satisfy the condition [T1 ≥ 2.0 mm]. The upper limit of the height T1 is not particularly limited, but it may be 5.0 mm, for example. That is, the height T1 may satisfy the condition [5.0 mm ≥ T1 ≥ 1.5 mm] or the condition [5.0 mm ≥ T1 ≥ 2.0 mm].

[0126] In this embodiment, the thickness D1, which represents the dimensions of the longitudinal ribs 41 in the left-right direction, satisfies the condition [D1 ≤ 3.0 mm].

[0127] In the above configuration, the air can flow smoothly because the thickness D1 is suppressed. The lower limit of the thickness D1 is not particularly limited, but it may be 0.5 mm, for example. That is, the thickness D1 may satisfy the condition [0.5 mm ≤ D1 ≤ 3.0 mm].

[0128] In this embodiment, the spacing G1 between a pair of adjacent longitudinal ribs 41 in the left-right direction satisfies the condition [G1 ≤ 4.0 mm].

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

[0130] In this embodiment, the inner surface of the second groove 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 located at the boundary between the second lower surface 26, which is located to the left of the suction port 6, and the left end of the suction port 6, and a right side surface 13R located at the boundary between the second lower surface 26, which is located to the right of the suction port 6, and the right end of the suction port 6. The nozzle 1 is provided with transverse ribs 42 on the left side surface 13L and the right side surface 13R, respectively, so as to extend in the vertical direction. Multiple transverse ribs 42 are arranged at intervals in the front-rear direction.

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

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

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

[0134] [Other embodiments] In the embodiment described above, multiple rollers 9 are provided. However, there may be only one roller 9.

[0135] In the above embodiment, the lower case 2A and the upper case 2B may be a single unit. [Explanation of Symbols]

[0136] 1...Nozzle, 2...Main body, 2A...Lower case, 2B...Upper case, 3...Fittings, 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 section, 31...First groove section, 32...Second groove section, 41...Vertical rib, 41A...Vertical rib, 41B...Vertical rib, 42...Horizontal rib, 42 A...Transverse rib, 42B...Transverse rib, 43...Vertical rib, 50...Cleaner, 51...Cleaner body, 52...Pipe, 53...Handle, 54...Housing, 55...Motor, 56...Fan, 57...Battery, 58...Intake port, 59...Exhaust port, 60...Filter, B1...Dimensions, B2...Dimensions, Bt...Dimensions, 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 is provided on the lower surface so as to be recessed upward from the lower surface, It comprises a suction port provided inside the groove so as to face the surface to be cleaned, The groove portion includes a first groove portion and a second groove portion, at least a portion of which is provided behind the first groove portion. The inner surface of the first groove and the inner surface of the second groove are connected to the suction port, The depth H1 of the first groove is deeper than the depth H2 of the second groove. nozzle.

2. In the left-right direction, the center of the groove and the center of the main body coincide. The nozzle according to claim 1.

3. In the left-right direction, the center of the first groove and the center of the second groove coincide. The nozzle according to claim 2.

4. The dimension B1 of the first groove in the left-right direction and the dimension B2 of the second groove in the left-right direction are, B1 < B2 Satisfying the conditions, The nozzle according to claim 3.

5. In the left-right direction, the center of the suction port and the center of the groove coincide. The nozzle according to claim 3.

6. The front end of the suction port and the front end of the first groove coincide. The rear end of the suction port and the rear end of the second groove coincide. The nozzle according to claim 5.

7. In the left-right direction, the center of the first groove and the center of the main body coincide. The dimension B1 of the first groove in the left-right direction and the dimension Bt of the main body in the left-right direction are, B1 ≥ 0.5 × Bt Satisfying the conditions, The nozzle according to claim 2.

8. The first width W1, which indicates the dimensions of the first groove in the front-rear direction, and the depth H2 are, W1 ≥ H2 Satisfying the conditions, The nozzle according to claim 1.

9. The first width W1, which indicates the dimension of the first groove in the front-rear direction, and the total width Wt, which indicates the sum of the dimension of the first groove and the dimension of the second groove in the front-rear direction, W1 ≤ 0.9 × Wt Satisfying the conditions, The nozzle according to claim 8.

10. The depth H3, which represents the difference between the aforementioned depth H1 and the aforementioned depth H2, H3 ≥ 1.5 mm Satisfying the conditions, The nozzle according to claim 1.

11. The inner surface of the first groove includes a first rear surface connected to the front end of the second groove and facing forward, a first front surface positioned forward of the first rear surface and facing the first rear surface, and a first lower surface connecting the upper end of the first rear surface and the upper end of the first front surface. It comprises vertical ribs that extend in the vertical direction and are provided on the first front surface, at least a portion of which is provided, The aforementioned longitudinal ribs are arranged in multiples with spacing between them in the left-right direction. The nozzle according to claim 1.

12. Of the multiple longitudinal ribs arranged in the left-right direction, the leftmost longitudinal rib is positioned to the left of the left end of the suction port, and the rightmost longitudinal rib is positioned to the right of the right end of the suction port. The nozzle according to claim 11.

13. The height T1, which indicates the amount of protrusion of the longitudinal rib from the first front surface, T1 ≥ 1.5 mm Satisfying the conditions, The nozzle according to claim 11.

14. The thickness D1, which indicates the dimension of the longitudinal rib in the left-right direction, D1 ≤ 3.0 mm Satisfying the conditions, The nozzle according to claim 11.

15. The distance G1 between a pair of longitudinal ribs adjacent to each other in the left-right direction is G1 ≤ 4.0 mm Satisfying the conditions, The nozzle according to claim 11.

16. The inner surface of the second groove includes a second lower surface connected to the lower end of the first rear surface, and a second rear surface connected to the rear end of the second lower surface and facing forward. The main body has a left side surface positioned at the boundary between the second lower surface located to the left of the suction port and the left end of the suction port, and a right side surface positioned at the boundary between the second lower surface located to the right of the suction port and the right end of the suction port. It is provided with transverse ribs on the left side and the right side, respectively, that extend in the vertical direction, The aforementioned transverse ribs are arranged in multiples with intervals between them in the front-rear direction. The nozzle according to claim 11.

17. The nozzle according to claim 1, Motor and, The system includes a fan that is rotated by the motor and generates suction at the nozzle's intake port. Cleaner.

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