Suction nozzle device

Abstract

An attraction nozzle device has a nozzle body having a suction port provided at a central portion in a longitudinal direction of a rotary cleaning body housing chamber, and a rotary cleaning body having a plurality of brush portions provided from one end side to the other end side of a shaft portion, and is configured such that the other end side is more retarded than the one end side with respect to a rotation direction, and an axis direction of a rotation axis of the shaft portion is parallel to the longitudinal direction of the rotary cleaning body housing chamber. In the attraction nozzle device, a plurality of first ribs and a plurality of second ribs that contact the front ends of the brush portions are provided on both sides of the suction port of the rotary cleaning body housing chamber, respectively. The plurality of ribs are inclined more toward the center of the rotary cleaning body housing chamber on the rear side than on the front side with respect to the rotation direction, and the inclination angle of the first ribs is smaller than the inclination angle of the second ribs. Dust scraped from a surface to be cleaned by the used rotary cleaning body is effectively sent to the suction port.

Description

Technical Field

[0001] This invention relates to a suction nozzle device for an electric vacuum cleaner. Background Technology

[0002] As a known suction nozzle device, there is a device comprising a suction nozzle body (corresponding to the nozzle body of the present invention) and a rotating cleaning body disposed within the suction nozzle body. The suction nozzle body has a suction inlet, and an inclined rib is provided within the suction nozzle body to contact the bristle member (corresponding to the brush portion of the present invention) of the rotating cleaning body (see, for example, Japanese Patent No. 4801516). With this configuration, the bristle member of the rotating cleaning body can contact the rib, thereby removing dust adhering to the bristle member and guiding it toward the suction inlet. Furthermore, although the rib's inclined direction is opposite on the right and left sides of the suction inlet, the absolute value of its inclined angle is the same on the right and left sides of the suction inlet. Summary of the Invention

[0003] However, in such suction nozzle devices, the brush portion of the rotating cleaning body is generally twisted so that the other end lags behind the rotation direction compared to one end of the shaft. That is, the angle of intersection between the brush portion and the ribs differs depending on whether the suction port is clamped at one end or the other. This results in a difference in dust suction capacity between the two ends where the suction port is clamped.

[0004] The purpose of this invention is to solve the above-mentioned problems and provide a suction nozzle device that can effectively deliver dust scraped from the surface being cleaned by a rotating cleaning body to the suction inlet.

[0005] The suction nozzle device described in this invention includes a nozzle body and a rotating cleaning body. The nozzle body has a rotating cleaning body receiving chamber and a suction port. The rotating cleaning body receiving chamber has a long side direction, and the suction port is located at the center of the long side direction of the rotating cleaning body receiving chamber. The rotating cleaning body has a shaft portion and multiple brush portions disposed from one end of the shaft portion to the other end. The brush portions are configured such that the other end of the shaft portion lags behind the rotation direction, and the axial direction of the shaft portion is parallel to the long side direction of the rotating cleaning body receiving chamber. In this suction nozzle device:

[0006] In the rotating cleaning body storage chamber, ribs that contact the brush part are respectively provided on both sides of the suction port. The ribs are inclined such that the rear side in the rotation direction is more towards the center of the rotating cleaning body storage chamber than the front side in the rotation direction of the rotating cleaning body. Furthermore, the angle of the first rib provided on one end of the suction port relative to the rotation axis is smaller than the angle of the second rib provided on the other end of the suction port relative to the rotation axis.

[0007] Furthermore, in the aforementioned suction nozzle device, the intersection angle between the first rib and the brush portion is equal to the intersection angle between the second rib and the brush portion.

[0008] Furthermore, in the aforementioned suction nozzle device, the number of the second ribs is greater than that of the first ribs.

[0009] Invention Effects

[0010] The suction nozzle device described in this invention can be configured in such a way that the difference in the ability to remove dust from the brush section caused by the ribs between one end and the other end of the rotating cleaning body that clamps the suction port is reduced, and dust is removed from one end and the other end of the brush section in the same way, so that dust can be effectively suctioned and removed from the surface being cleaned.

[0011] Furthermore, since the angle between the first rib and the brush portion can be set to be equal to the angle between the second rib and the brush portion, the ability to remove dust from the brush portion by the ribs can be equal on one end and the other end of the rotating cleaning body that clamps the suction port, and dust can be removed on one end and the other end of the brush portion in the same way, thus dust can be effectively attracted and removed from the surface being cleaned.

[0012] Furthermore, since the difference in the range of dust removal from the brush section formed by the ribs can be reduced by setting the number of the second ribs to be greater than the number of the first ribs, dust can be removed from the brush section as a whole, thus effectively attracting and removing dust from the surface being cleaned. Attached Figure Description

[0013] Figure 1 This is a top view showing an suction nozzle device according to one embodiment of the present invention.

[0014] Figure 2 This is a bottom view of the suction nozzle device.

[0015] Figure 3 This is a bottom view of the suction nozzle device with the rotating cleaning body removed.

[0016] Figure 4 The diagram shows the external view of the rotating cleaning body of the suction nozzle device, wherein (a) is the external view viewed from the axial vertical direction, and (b) is an enlarged cross-sectional view along line AA in (a).

[0017] Figure 5 yes Figure 1 A cross-sectional view of the suction nozzle device along line BB.

[0018] Figure 6This is a schematic diagram showing the relationship between the ribs and the brush portion of the suction nozzle device.

[0019] Figure 7 yes Figure 6 An enlarged view of one end of the image.

[0020] Figure 8 yes Figure 6 An enlarged view of the other end of the image. Detailed Implementation

[0021] [The form in which the invention is implemented]

[0022] The following describes an embodiment of the present invention based on... Figures 1 to 8 To illustrate. Furthermore, the preceding and following in this embodiment are based on... Figure 1 and Figure 2 To stipulate. That is, to... Figure 1 The bottom side is set to front, and the top side is set to back. Also, [the following text is incomplete and requires further context: "..."] Figure 2 The top side is set as the front, and the bottom side is set as the back. Also, the top side is set as the back. Figure 1 and Figure 2 The right side is designated as right, and the left side as left. Reference numeral 1 indicates the suction nozzle device of the present invention. The suction nozzle device 1 of the present invention can be installed relative to the vacuum cleaner body (not shown) in a manner that allows for direct or indirect attachment and detachment. Furthermore, the suction nozzle device 1 can also be integrally formed with the vacuum cleaner body.

[0023] The suction nozzle device 1 includes a nozzle body 2, a rotating cleaning body 3, a joint 4, and a connecting cylinder 5. The nozzle body 2 has its long side in the left-right direction and its short side in the front-back direction. A relatively long suction opening 21 is provided on the lower front side of the nozzle body 2 in the left-right direction. A notch 22, open at the rear and top, is formed in the center of the rear of the nozzle body 2. The joint 4 is swayably mounted on the notch 22. A protruding portion 23 protruding rearward is formed around the notch 22. A ball bearing 24 is exposed downward in each of the protruding portions 23 on the left and right sides of the notch 22. The ball bearing 24 contacts the surface being cleaned, such as the ground. Furthermore, a bearing structure (not shown) is provided inside the ball bearing 24 to allow for smooth movement. Additionally, a relatively long brush 25 is provided in the left-right direction behind the suction opening 21.

[0024] The joint 4 has an undulating portion 41 and a rotating portion 42. The undulating portion 41 has a swing cylinder portion 43, a connecting tube 44, and a connecting portion 45. On the other hand, the rotating portion 42 has a connecting portion 46 and the connecting cylinder portion 5. The connecting cylinder portion 5 is detachably connected to the vacuum cleaner body (not shown). The swing cylinder portion 43 is pivotally supported in the notch portion 22 with its rotation axis pointing left and right. Furthermore, a communication port 47 communicating with the suction port 29 is formed in the swing cylinder portion 43. Also, the connecting tube 44 extends in a direction intersecting the rotation axis of the swing cylinder portion 43 and is integrally formed with the swing cylinder portion 43. In addition, the connecting portion 46 of the rotating portion 42 is rotatably connected to the connecting portion 45. Furthermore, as Figure 5 As shown, when the joint 4 is upright, the connecting portion 46 of the rotating part 42 is located in front of the connecting portion 45 of the undulating part 41. Thus, since the connecting portion 46 of the rotating part 42 is located in front of the connecting portion 45 of the undulating part 41, the direction of the nozzle body 2 can be changed by twisting the connecting cylinder 5 and the vacuum cleaner body connected to it around the central axis of the connecting cylinder 5. Furthermore, when the joint 4 is upright, the connecting portion 46 of the rotating part 42 is almost centrally located in the front-rear direction of the nozzle body 2.

[0025] A rotating cleaning body receiving chamber 26 with an open lower side is formed at the front of the nozzle body 2, and the open portion of the rotating cleaning body receiving chamber 26 is the suction opening 21. The rotating cleaning body receiving chamber 26 has a long side in the left-right direction. Furthermore, a through hole (not shown) is provided at one end of the rotating cleaning body receiving chamber 26, i.e., the right end, and a drive connection part 27 is provided in the through hole. Moreover, the drive connection part 27 is rotated by a drive source (not shown). On the other hand, a bearing support part 28 is provided at the other end of the rotating cleaning body receiving chamber 26, i.e., the left end. Also, a suction port 29 is provided at the rear of the center of the long side of the rotating cleaning body receiving chamber 26. The suction port 29 is located behind the rotating cleaning body 3 and is connected to the cavity 48 in the undulating part 41 through the connecting port 47. Furthermore, the cavity 48 is connected to the cavity 49 in the rotating part 42. Furthermore, the cavity 49 within the rotating part 42 is connected to the suction path of the vacuum cleaner body because the connecting cylinder part 5 is connected to the vacuum cleaner body. In this way, a suction path 6 can be formed inside the suction nozzle device 1, from the suction opening 21 through the suction port 29, the connecting port 47, the cavity 48, and the cavity 49 to the discharge port 51 of the connecting cylinder part 5.

[0026] The rotating cleaning body 3 has a shaft portion 31. The shaft portion 31 has four mounting grooves 32 extending from one end to the other. Furthermore, these mounting grooves 32 are formed at equal intervals along the circumference of the shaft portion 31. Each mounting groove 32 is twisted in the circumferential direction to form a spiral shape, with one end (i.e., the right side) of the shaft portion 31 lagging behind the rotation direction R of the rotating cleaning body 3. Furthermore, the rotation direction R is... Figure 5 The rotation is counterclockwise (counterclockwise direction). In this embodiment, each mounting groove 32 is formed by twisting the shaft portion 31 from one end to the other in a circumferential direction by π / 2. Furthermore, the twist angle of each mounting groove 32 is fixed from one end of the shaft portion 31 to the other. Each mounting groove 32 is equipped with a brush portion 33. That is, four brush portions 33 are equally spaced in the circumferential direction of the shaft portion 31 such that the other end (i.e., the left end) lags behind the rotation direction R of the rotating cleaning body 3 compared to one end (i.e., the right side) of the shaft portion 31. Furthermore, an imaginary cylindrical surface C is defined with the rotation axis X of the shaft portion 31 as the center and the distance from the rotation axis X to the front end of each brush portion 33 as the radius. The angle θ1 of the brush portion 33 with respect to the rotation axis X when the imaginary cylindrical surface C is unfolded is θ1. And this angle θ1 is fixed. Furthermore, a driven connection portion 34 is provided at one end (i.e., the right side) of the shaft portion 31, corresponding to the drive connection portion 27. The driven connection portion 34 and the drive connection portion 27 form a coupling structure. On the other hand, a bearing portion 35 is provided at the other end (i.e., the left side) of the shaft portion 31, corresponding to the bearing support portion 28. That is, with the rotating cleaning body 3 installed in the rotating cleaning body storage chamber 26, the driving force from a drive source (not shown) is transmitted to the driven connection portion 34 through the drive connection portion 27, thereby causing the rotating cleaning body 3 to rotate within the rotating cleaning body storage chamber 26. The drive source is an electric motor, which can be powered and rotated by contacting the surface being cleaned via a switch 36. Moreover, although the drive source in this embodiment is an electric motor, it could also be a turbine that rotates by drawing airflow. Furthermore, the brush portion 33 protrudes slightly downwards than the ball caster 24. That is, when the suction nozzle device 1 has been placed on the surface to be cleaned, the brush part 33 will come into contact with the surface to be cleaned.

[0027] A first rib group 72 and a second rib group 73 are provided on the upper rear wall 71 of the rotating cleaning body receiving chamber 26. The first rib group 72 is located on one end side (i.e., the right side) relative to the suction port 29. On the other hand, the second rib group 73 is located on the other end side (i.e., the left side) relative to the suction port 29. That is, the first rib group 72 and the second rib group 73 are provided on both sides of the rotating cleaning body receiving chamber 26, sandwiching the suction port 29. Furthermore, the first rib group 72 and the second rib group 73 are provided at a distance approximately equal to the width of the suction port 29. Also, the first rib group 72 and the second rib group 73 are each located behind (i.e., above and in front of) the rotating cleaning body 3 in the rotation direction R of the rotating cleaning body 3 relative to the suction port 29. Furthermore, the height of the plurality of first ribs 74 constituting the first rib group 72 is such that the front end of the brush portion 33 will contact the rotating cleaning body 3 when it is installed in the rotating cleaning body storage chamber 26. Similarly, the height of the plurality of second ribs 75 constituting the second rib group 73 is such that the front end of the brush portion 33 will contact the rotating cleaning body 3 when it is installed in the rotating cleaning body storage chamber 26. Moreover, the height of the first ribs 74 and the height of the second ribs 75 are equal.

[0028] Furthermore, the plurality of first ribs 74 constituting the first rib group 72 are inclined toward the center of the rotating cleaning body storage chamber 26 as they move from the front to the rear in the rotation direction R of the rotating cleaning body 3 (that is, from the rear to the front in the rotating cleaning body storage chamber 26). Similarly, the plurality of second ribs 75 constituting the second rib group 73 are also inclined toward the center of the rotating cleaning body storage chamber 26 as they move from the front to the rear in the rotation direction R of the rotating cleaning body 3 (that is, from the rear to the front in the rotating cleaning body storage chamber 26). Moreover, the angle θ2 of the first rib 74 relative to the rotation axis X is smaller than the angle θ3 of the second rib 75 relative to the rotation axis X. Thus, by making the angle θ2 formed by the first rib 74 and the rotation axis X smaller than the angle θ3 formed by the second rib 75 and the rotation axis X, the difference between the intersection angle θ4 (=θ2+θ1) of the brush portion 33 and the first rib 74, which are inclined relative to the rotation axis X, and the intersection angle θ5 (=θ3-θ1) of the brush portion 33 and the second rib 75 is reduced. Furthermore, in this embodiment, θ4=θ5. In addition, in this embodiment, the first rib 74 constituting the first rib group 72 has 5 ribs (4 long and 1 short), and the second rib 75 constituting the second rib group 73 has 6 ribs (6 long). As a result, the range of the first rib group 72 in the rotation axis X direction is equal to the range of the second rib group 73 in the rotation axis X direction.

[0029] Next, the function of this embodiment will be explained. First, the user connects the connecting sleeve 5 of the suction nozzle device 1 of this embodiment to the vacuum cleaner body (not shown). Furthermore, the suction nozzle device 1 can be directly connected to the vacuum cleaner body, or it can be connected by inserting an extension tube or the like. Then, by activating the electric blower built into the vacuum cleaner body, a suction airflow is formed that flows from the suction opening 21 of the suction nozzle device 1 through the suction path 6 toward the vacuum cleaner body. Furthermore, when the suction nozzle device 1 is placed on a surface to be cleaned, such as the ground, the switch 36 is pushed upwards, activating the drive source (not shown) of the nozzle body 2, i.e., the electric motor, causing the rotating cleaning body 3 to rotate in the rotation direction R. Furthermore, as described above, the rotation direction R is... Figure 5 The rotation is counterclockwise. That is, above the rotation axis X, the brush part 33 moves from the rear to the front within the rotating cleaning body storage chamber 26. Conversely, below the rotation axis X, the brush part 33 moves from the front to the rear within the rotating cleaning body storage chamber 26. By rotating the rotating cleaning body 3 in this way, dust D on the cleaned surface is sent to the rear by the brush part 33. Furthermore, since the angle of the brush part 33 relative to the rotation axis X is θ1 when the imaginary cylindrical surface C is unfolded by twisting the brush part 33, it is difficult to produce uneven contact resistance between the cleaned surface and the brush part 33 when the rotating cleaning body 3 rotates. And, the dust D sent to the rear by the brush part 33 in this way will accumulate in the dust collection section inside the vacuum cleaner body from the suction port 29 through the suction path 6.

[0030] Furthermore, there is a concern that dust D may adhere to the brush portion 33. However, as described, the front end of the brush portion 33 will contact the first rib group 72 or the second rib group 73 formed on the upper rear wall 71 of the rotating cleaning body receiving chamber 26, such as... Figure 7 and Figure 8 As shown, dust D adhering to the brush portion 33 moves along the first rib 74 or the second rib 75 toward the center of the rotating cleaning body 3. Furthermore, dust D that has moved toward the center along the first rib 74 or the second rib 75 will rotate once by the rotating cleaning body 3 and move further toward the center along the first rib 74 or the second rib 75 adjacent to the center side.

[0031] For example, in the case of the first rib group 72, when the rotating sweeping body 3 rotates one revolution, along the outermost ( Figure 7 The first rib 74a on the right side of the middle (towards the central side of the inlet 29) faces the central side. Figure 7The dust D moving on the left side will move further towards the center along the first rib 74b, which is adjacent to the center side more than the first rib 74a. Then, the dust D will move further towards the center along the first ribs 74c, 74d, and 74e. Then, the dust D moving towards the center along the first rib 74e, which is located on the far center side, will be attracted by the suction port 29.

[0032] Similarly, in the case of the second rib group 73, when the rotating cleaning body 3 rotates one revolution, along the outermost ( Figure 8 The second rib 75a on the left side of the middle (towards the central side of the inlet 29) faces the central side. Figure 8 The dust D moving along the right side of the second rib (75a) will move further towards the center along the second rib 75b, which is adjacent to the center side. Then, the dust D will move further towards the center along the second ribs 75c, 75d, 75e, and 75f. Finally, the dust D moving towards the center along the second rib 75f, which is located on the far center side, will be attracted by the suction port 29.

[0033] In this way, the dust D already attached to the brush section 33 can be conveyed and sucked towards the suction port 29, thus preventing the dust D from remaining attached to the brush section 33. Since this allows the surface to be cleaned to be cleaned by the brush section 33 with the dust D removed, the ability to remove dust D from the surface being cleaned is improved.

[0034] Furthermore, as described, if the imaginary cylindrical surface C is unfolded, the brush portion 33 will tilt θ1 relative to the rotation axis X. Therefore, if the tilt angle θ2 of the first rib 74 relative to the rotation axis X is the same as the tilt angle θ3 of the second rib 75 relative to the rotation axis X, the following situation will occur: the intersection angle θ4 (=θ2+θ1) of the brush portion 33 and the first rib 74 is different from the intersection angle θ5 (=θ3-θ1) of the brush portion 33 and the second rib 75, raising concerns about the difference in dust removal capabilities caused by the first rib group 72 and the second rib group 73. However, in this embodiment, since angle θ2 is set smaller than angle θ3 in order to make the cross angles θ4 and θ5 equal (or to reduce the difference between them), the ability of the first rib group 72 to remove dust D from the brush portion 33 is equal to the ability of the second rib group 73 to remove dust D from the brush portion 33, thus removing dust D from one end of the brush portion 33 in the same way as the other end. As a result, dust D can be effectively attracted and removed from the surface being cleaned.

[0035] Furthermore, by setting the number of second ribs 75 constituting the second rib group 73 to be greater than the number of first ribs 74 constituting the first rib group 72, and setting the range of the first rib group 72 in the rotation axis X direction to be equal to the range of the second rib group 73 in the rotation axis X direction, the difference between the range formed by the first rib group 72 and the range formed by the second rib group 73 for removing dust D from the brush part 33 is reduced, allowing dust D to be removed from the brush part 33 as a whole. As a result, dust D can be effectively attracted and removed from the cleaned surface.

[0036] As described above, the present invention, in its suction nozzle device 1, comprises a nozzle body 2 and a rotating cleaning body 3. The nozzle body 2 has a rotating cleaning body receiving chamber 26 and a suction port 29. The rotating cleaning body receiving chamber 26 has a long side direction, and the suction port 29 is located at the center of the long side direction of the rotating cleaning body receiving chamber 26. The rotating cleaning body 3 has a shaft portion 31 and multiple brush portions 33 disposed from one end of the shaft portion 31 to the other end. These brush portions 33 are configured such that, compared to one end of the shaft portion 31, the other end lags behind the rotation direction R, and the axial direction of the rotation axis X of the shaft portion 31 is parallel to the long side direction of the rotating cleaning body receiving chamber 26. In the suction nozzle device 1, this is as follows:

[0037] In the rotating cleaning body receiving chamber 26, a first rib group 72 composed of multiple first ribs 74 and a second rib group 73 composed of multiple second ribs 75 are respectively provided on both sides of the suction port 29, which are in contact with the front end of the brush part 33. The multiple ribs 74 and 75 are inclined such that the rear side of the rotation direction R is more towards the center of the rotating cleaning body receiving chamber 26 than the front side of the rotating cleaning body 3. Furthermore, the angle θ2 of the first rib 74 relative to the rotation axis X is smaller than the angle θ3 of the second rib 75 relative to the rotation axis X. As a result, the difference in the ability of the rib groups 72 and 73 to remove dust D from the brush part 33 is reduced between one end and the other end of the rotating cleaning body 3. Dust D can be removed equally from one end and the other end of the brush part 33. Therefore, dust D can be effectively attracted and removed from the cleaning surface.

[0038] Furthermore, since the present invention can make the intersection angle θ4 of the first rib 74 and the brush portion 33 equal to the intersection angle θ5 of the second rib 75 and the brush portion 33, the ability of removing dust D from the brush portion 33 by the rib group 72, 73 is equal on one end side and the other end side of the rotating cleaning body 3 that clamps the suction port 29. Thus, dust D can be removed from the cleaning surface more effectively.

[0039] Furthermore, since the present invention removes dust D from the brush portion 33 as a whole by setting the number of second ribs 75 constituting the second rib group 73 to be greater than the number of first ribs 74 constituting the first rib group 72, the difference in the range of dust D removed from the brush portion 33 formed by the rib groups 72 and 73 is reduced, thus effectively attracting and removing dust D from the cleaned surface.

[0040] Furthermore, this invention is not limited to the embodiments described above, and various modifications can be implemented within the scope of the invention's intent. For example, in the embodiments described above, although θ4 = θ5, they may not be exactly equal (θ4 ≒ θ5). Also, in the embodiments described above, although ribs are only provided on the upper rear wall of the rotating cleaning body storage chamber, the ribs may be provided over a wider area along the rotation direction R of the rotating cleaning body, or even further, they may be provided over the entire area along the rotation direction R in the rotating cleaning body storage chamber. In this case, depending on the width of the rotating cleaning body storage chamber in the rotation axis X direction or the values ​​of the inclination angles θ2 and θ3 of the ribs, there may be cases where the number of ribs is not multiple but a single rib is sufficient.

Claims

1. A suction nozzle device comprising a nozzle body and a rotating cleaning body, the nozzle body having a rotating cleaning body receiving chamber and a suction port, the rotating cleaning body receiving chamber having a long side direction, the suction port being disposed at the center of the rotating cleaning body receiving chamber in the long side direction, the rotating cleaning body having a shaft portion and a plurality of brush portions disposed from one end of the shaft portion to the other end, wherein the brush portions are configured such that: compared to one end of the shaft portion, the other end lags behind the rotation direction, and the axial direction of the shaft portion is parallel to the long side direction of the rotating cleaning body receiving chamber, characterized in that: In the rotating cleaning body storage chamber, ribs are respectively provided on both sides of the suction port, which are in contact with the brush part. The ribs are inclined such that the rear side in the rotation direction is more towards the center of the rotating cleaning body storage chamber than the front side in the rotation direction of the rotating cleaning body. Furthermore, the angle of the first rib located at one end of the inlet relative to the rotation axis is smaller than the angle of the second rib located at the other end of the inlet relative to the rotation axis; the intersection angle between the first rib and the brush portion is equal to the intersection angle between the second rib and the brush portion.

2. The suction nozzle arrangement of claim 1, wherein: The number of the second rib is greater than that of the first rib.

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