JP6533974B2 - Electric vacuum cleaner - Google Patents

Description

  The present invention relates to a vacuum cleaner.

  In FIG. 12 of Patent Document 1, ducts 104 and 105 for providing an air path from the dust collection unit to the electric blower are shown. The duct 104 is in contact with a cover 102 (case) covering the electric blower 106.

JP, 2014-136015, A

  The exhaust of the electric blower includes fine particles which can not be filtered (removed) by a separation function of a cyclone, a filter or the like provided on the upstream side of the electric blower, or wear powder of a carbon brush generated by the operation of the electric blower. Therefore, in order to keep the exhaust of the vacuum cleaner clean, it is necessary to provide a filter on the downstream side of the electric blower.

  At this time, it is important that the exhaust of the electric blower passes through the filter disposed downstream of the electric blower with certainty. Therefore, it is necessary to prevent the exhaust of the electric blower from leaking out of the path other than the path through the filter. In particular, care must be taken to ensure that the exhaust does not leak between the duct and the case.

  In order to prevent the exhaust of the electric blower from leaking between the duct and the case, there is a seal member for closing between the duct and the case. However, there is a problem that a gap is formed between the duct and the case when the seal member is torn or deformed by the vibration of the electric blower.

  The present invention has been made to solve the problems as described above, and it is an object of the present invention to provide a vacuum cleaner capable of preventing a gap from being formed between a duct and a case.

A vacuum cleaner according to the invention of this application is a fan cover in which an electric blower, an inlet through which the electric blower is covered, through which air taken into the electric blower passes, and an exhaust port through which the exhaust of the electric blower passes are formed. An electric fan case covering the fan cover and providing an air path leading to the exhaust port; a duct providing an air path leading to the inlet; and elasticity between the duct and the electric fan case. The upper surface vibration isolation portion includes a deformed seal portion , a side surface of the fan cover, a side vibration isolation portion in contact with the electric blower case, and an upper surface vibration isolation portion in contact with the upper surface of the fan cover and the duct. The side anti-vibration portion and the seal portion are integrally formed .

  According to the present invention, since the space between the duct and the case is closed by a member which does not directly receive the vibration of the electric blower, it is possible to prevent a gap from being formed between the duct and the case.

1 is a perspective view of a vacuum cleaner according to Embodiment 1. FIG. It is a perspective view of the main part of a vacuum cleaner. It is a top view of the main part of a vacuum cleaner. It is the sectional view on the AA line of FIG. It is sectional drawing of a soft member etc. It is a perspective view of an electric blower case etc. FIG. 7 is an exploded view of the arrangement of FIG. 6; It is a top view of the inside of a main part. It is the BB sectional drawing of FIG. It is the CC sectional view taken on the line of FIG. It is a graph which shows the measurement result of the driving | running sound of the vacuum cleaner which concerns on Embodiment 1. FIG. It is a graph which shows the measurement result of the driving | operation sound of the vacuum cleaner which concerns on a 1st comparative example. It is sectional drawing of the main body of the vacuum cleaner concerning a 2nd comparative example. FIG. 7 is a cross-sectional view showing a soft member and the like according to a second embodiment. FIG. 10 is a cross-sectional view showing a soft member and the like according to a third embodiment. FIG. 14 is a cross-sectional view showing a shock absorbing material and the like according to a fourth embodiment.

  A vacuum cleaner according to an embodiment of the present invention will be described with reference to the drawings. The same or corresponding components may be assigned the same reference numerals and repetition of the description may be omitted.

Embodiment 1
FIG. 1 is a perspective view of a vacuum cleaner 1 according to Embodiment 1 of the present invention. The vacuum cleaner 1 is a canister type. The vacuum cleaner 1 includes, for example, a suction head 2, an extension pipe 3, a connection pipe 4, a suction hose 5 and a main body 6.

  A suction port is formed in the suction head 2. The suction port is a downward opening formed in the suction head 2. The suction head 2 is provided with a connecting pipe at the center. One end of the extension pipe 3 is connected to the connection pipe of the suction head 2. The suction head 2 is removable from the extension pipe 3. The extension pipe 3 is stretchable. The length of the extension pipe 3 can be adjusted steplessly or in multiple steps.

  One end of the connection pipe 4 is connected to the other end of the extension pipe 3. The extension pipe 3 is removable from the connection pipe 4. The connection pipe 4 includes a cylindrical member and an operation handle 7 provided on the member. The operation handle 7 is a portion held by the user for moving the suction head 2. An operating switch 8 is provided on the operating handle 7. For example, the operation switch 8 includes a plurality of buttons for controlling the operation of the vacuum cleaner 1.

  One end of the suction hose 5 is connected to the other end of the connection pipe 4. The other end 5 a of the suction hose 5 is connected to the connection 12 of the main body 6. The suction hose 5 is bellows-shaped except for the end 5a, and is bent in any direction. The suction hose 5 is removable from the main body 6. The end 5a of the suction hose 5 is formed in a cylindrical shape, for example, by a plurality of rigid plastic members. The suction head 2, the extension pipe 3, the connection pipe 4 and the suction hose 5 form an air passage for guiding air containing dust (dust-containing air) from the outside to the main body 6.

  The main body 6 is provided with a dust collection unit 10 and a suction unit 9. The dust collection unit 10 is attachable to and detachable from the suction unit 9. The main body 6 is attached with a handle 13 which is a portion held by the user when lifting the main body 6. Wheels 14 are provided on both sides of the main body 6.

  FIG. 2 is a perspective view of the main body 6 of the vacuum cleaner 1. The main body 6 has a function of separating the dust from the air including the dust. In addition, the main body 6 has a function of collecting separated waste. The main body 6 is provided with a power cord 16 for supplying power.

  FIG. 3 is a plan view of the main body of the vacuum cleaner 1. FIG. 4 is a cross-sectional view taken along line AA of FIG. In the following description, the vertical direction is specified based on the state shown in FIG. With regard to the front-rear direction, the left side of FIG.

  The suction unit 9 and the dust collection unit 10 are shown in FIG. The suction unit 9 includes a main body case 11, a hose connection portion 12 and a wheel 14. The main body case 11 includes, for example, a device case 17 and a dust collection case 18. Various devices are provided inside the device case 17. For example, the suction unit 9 includes the fan cover 52, the electric blower 19 covered with the fan cover 52, the filters 20 and 21, the cord reel, and the control device inside the device case 17. The electric blower 19 is supported by the fan cover 52 in an upright state on a horizontal surface.

  The fan cover 52 covers the electric blower 19. The fan cover 52 is formed with an inlet 52 a through which the air taken into the electric blower 19 passes, and an exhaust port 52 b through which the exhaust gas of the electric blower 19 passes. A shock absorbing material 90 is attached to the bottom (lower end) of the fan cover 52. The shock absorbing material 90 is formed of, for example, a soft material such as rubber.

  The duct 50 is a member that provides a part of the exhaust air passage 22. The duct 50 provides an air path leading to the inlet 52a. That is, the duct 50 provides an air path for guiding the air discharged from the dust collection unit 10 to the electric blower 19.

  The fan cover 52 is covered by an electric blower case 56. The electric blower case 56 provides an air path leading to the exhaust port 52b. That is, the electric fan case 56 provides a flow path for guiding the exhaust of the electric fan 19 to the filter 21. The electric blower case 56 is formed with a recess 56 a for accommodating the shock absorbing material 90.

  A soft member 54 is provided between the side surface of the fan cover 52 and the electric fan case 56. The soft member 54 is preferably formed of a soft material such as rubber, for example. The soft member 54 also extends between the fan cover 52 and the duct 50. By providing the soft member 54 and the shock absorbing material 90, the duct 50 and the electric fan case 56 are prevented from coming into direct contact with the fan cover 52. The soft member 54 and the shock absorbing material 90 can provide a vibration damping effect.

  The main part of the exhaust air passage 22 is formed in the device case 17. The exhaust air passage 22 is an air passage for guiding the air from which dust is removed by the dust collection unit 10 to the exhaust port 23. The electric blower 19 and the filters 20, 21 are disposed in the exhaust air passage 22.

  The dust collection case 18 is disposed on the front side of the device case 17. The dust collection case 18 has, for example, a cylindrical shape whose one end is closed. The central axis of the dust collection case 18 is disposed obliquely, and the dust collection case 18 opens obliquely upward. The lower part of the dust collection case 18 projects forward from the upper part. The dust collection unit 10 is accommodated in the dust collection case 18. The dust collection unit 10 is removable from the dust collection case 18.

  The end 5 a of the suction hose 5 is connected to the hose connection 12. The hose connection portion 12 is provided on the upper portion of the main body case 11. The hose connection portion 12 is provided at a front portion of the main body case 11. In the example shown in the present embodiment, the hose connection portion 12 is provided on the top of the dust collection case 18. The hose connection portion 12 protrudes from the peripheral wall of the dust collection case 18 to the front side.

  The hose connection portion 12 is formed with a hollow portion 12 a into which the end 5 a of the suction hose 5 is inserted. When the suction hose 5 is connected to the hose connection 12, the end 5 a protrudes obliquely upward from the hose connection 12.

  The wheels 14 are rotatably provided on the main body case 11. The wheels 14 are provided, for example, on the rear side of the main body case 11. In the example shown in the present embodiment, the wheel 14 is rotatably provided on the device case 17. The wheels 14 are disposed on both sides of the device case 17.

  The electric blower 19 generates an air flow in an air passage formed in the vacuum cleaner 1. The air passage formed in the vacuum cleaner 1 includes, for example, an air passage for guiding air containing dust from the outside to the main body 6, an air passage formed in the dust collection unit 10, and an exhaust air passage 22. The electric blower 19 performs a suction operation set in advance according to the operation on the operation switch 8 in a state where the power supply cord is connected to the power supply.

  When the electric blower 19 performs a suction operation, an air flow is generated in an air passage formed in the vacuum cleaner 1. As a result, dust on the floor surface is sucked with air from the suction port of the suction head 2. Air including dust sucked into the suction head 2 flows into the inside of the main body 6 through the extension pipe 3, the connection pipe 4 and the suction hose 5.

  Air including dust that has flowed into the inside of the main body 6 is sent to the dust collection unit 10 through the hollow portion 12 a of the hose connection portion 12. The air flow generated inside the dust collection unit 10 will be described later. The air flowing out of the dust collection unit 10 flows into the exhaust air passage 22 and passes through the filter 20, the electric blower 19 and the filter 21. The air having passed through the filter 21 further travels through the exhaust air passage 22 and is discharged from the exhaust port 23 to the outside of the main body 6 (the room being cleaned).

  The dust collection unit 10 separates the dust from the air including the dust. The dust collection unit 10 separates dust by centrifugal force by swirling air containing dust at a high speed. That is, the dust collection unit 10 has a cyclone separation function. The dust collection unit 10 collects separated dust and temporarily stores it. Relatively clean air from the dust collection unit 10 flows into the exhaust air passage 22. A paper pack type dust collection unit may be employed instead of the cyclone type dust collection unit 10.

  The dust collection unit 10 is inserted into the dust collection case 18 from above. For example, the dust collection unit 10 can be removed from the dust collection case 18 by pulling the dust collection unit 10 upward while performing a predetermined operation. The dust collection unit 10 includes, for example, a plurality of molded products. By appropriately arranging the plurality of molded products, a swirl chamber 24, an inflow air passage 25, a zero-order dust collection chamber 26, a primary dust collection chamber 27 and an outflow air passage 28 are formed in the dust collection unit 10.

  The swirl chamber 24 is a space for swirling air containing dust. The lower portion of the swirl chamber 24 has a truncated cone shape whose diameter decreases in the downward direction. The side wall forming the swirl chamber 24 has a circular cross section in the direction orthogonal to the central axis of the swirl chamber 24. An inlet 29 is formed at the top of the side wall forming the swirl chamber 24. The inflow air path 25 leads to the swirl chamber 24 through the inflow port 29.

  The inflow air path 25 is an air path for introducing air including dust that has passed through the suction hoses 5 and the like to the swirl chamber 24. The inflow air path 25 opens at the peripheral wall of the dust collection unit 10. This opening is a unit inlet 30 of the dust collection unit 10. Unit inlet 30 is an opening for taking in air including dust into dust collection unit 10. Air including dust that has passed through the suction hose 5 or the like flows into the inflow air path 25 from the unit inlet 30. The air including the waste that has flowed into the inflow air path 25 passes through the inflow air path 25 and flows into the swirl chamber 24 from the inflow port 29. When the dust collection unit 10 is attached to the dust collection case 18, the unit inlet 30 faces the hollow portion 12 a of the hose connection portion 12.

  A zero-order opening 31 is formed on the side wall forming the swirl chamber 24. The zero-order opening 31 is formed downstream of the inlet 29. The zero-order dust collection chamber 26 communicates with the swirl chamber 24 through the zero-order opening 31. The zero-order dust collection chamber 26 has a cylindrical shape as a whole. The zero-order dust collection chamber 26 is formed to surround the periphery of the swirl chamber 24.

  A primary opening 32 is formed by the lower end of the side wall forming the swirl chamber 24. The primary opening 32 is formed downstream of the zero-order opening 31. The primary dust collection chamber 27 communicates with the swirl chamber 24 through the primary opening 32. The primary dust collection chamber 27 is formed so as to surround the lower end portion of the swirl chamber 24. The primary dust collection chamber 27 is surrounded by the zero-order dust collection chamber 26.

  The outlet pipe projecting into the swirl chamber 24 has an outlet 33 formed by a large number of fine holes. The outlet air passage 28 leads to the swirl chamber 24 through the outlet 33. The outflow air passage 28 is an air passage for allowing the air of the turning chamber 24 to flow out of the dust collection unit 10. The outlet air passage 28 opens at the peripheral wall of the dust collection unit 10. This opening is a unit outlet 34 of the dust collection unit 10. The unit outlet 34 is an opening for allowing air to flow out of the dust collection unit 10. The air of the swirl chamber 24 flows into the outlet air passage 28 from the outlet 33. The air flowing into the outlet air passage 28 passes through the outlet air passage 28 and flows out of the unit outlet 34 to the outside of the dust collection unit 10. When the dust collection unit 10 is attached to the dust collection case 18, the unit outlet 34 faces the exhaust air passage 22.

  Next, the function of the dust collection unit 10 will be described. When the electric blower 19 starts the suction operation, as described above, air including dust sucked into the suction head 2 passes through the unit inlet 30 and flows into the inlet air passage 25. The air including the waste that has flowed into the inflow air path 25 passes through the inflow air path 25 and flows into the swirl chamber 24 from the inflow port 29. At this time, air containing dust flows into the swirl chamber 24 from the tangential direction of the side wall forming the swirl chamber 24.

  The air that has flowed into the swirl chamber 24 from the inflow port 29 rotates in a direction set in advance in the swirl chamber 24. Thereby, a swirling air flow is formed in the swirling chamber 24. The swirling air flows downward by its path structure and gravity while forming a forced vortex region near the central axis and a free vortex region outside the forced vortex region.

  A centrifugal force acts on the dust contained in the swirling air flow. For example, relatively bulky waste α such as fiber waste and hair falls while being pressed against the side wall forming the swirl chamber 24 by the acting centrifugal force. Therefore, the dust α passes through the zero-order opening 31 when the height of the zero-order opening 31 is reached. The dust α that has passed through the zero-order opening 31 is sent to the zero-order dust collection chamber 26. As a result, the dust α falls into the zero-order dust collection chamber 26 and is collected.

  The refuse that has not entered the zero-order dust collection chamber 26 from the zero-order opening 31 moves downward further while turning. The relatively bulky waste β such as sand waste and fine fiber waste passes through the primary opening 32. Thereby, the dust β falls to the primary dust collection chamber 27 and is collected.

  When the swirling air flow reaches the lowermost portion of the swirling chamber 24, its traveling direction is changed upward. As a result, an updraft is formed along the central axis of the swirl chamber 24. The dust α and the dust β are removed from the air forming the updraft. The clean air from which the waste α and the waste β have been removed passes through the outlet 33 and flows out of the turning chamber 24. The air that has passed through the outlet 33 passes through the outlet air passage 28 and reaches the unit outlet 34. Then, the clean air passes through the unit outlet 34 and is sent to the exhaust air passage 22.

  The air that has entered the exhaust air passage 22 may slightly contain dust. In order to remove the dust, the air that has entered the exhaust air passage 22 passes the filter 20 by the suction force of the electric blower 19. The air having passed through the filter 20 is guided by the duct 50 to the inlet 52 a of the fan cover 52 and reaches the electric blower 19.

  The air that has entered the electric blower 19 proceeds in the direction of the arrow and is discharged from the electric blower 19. The air is exhausted forward from the exhaust port 52 b of the fan cover 52, and is guided to the filter 21 by the air path formed by the electric blower case 56. The air having passed through the filter 21 passes below the electric blower 19 and is exhausted from the exhaust port 23 to the outside.

  FIG. 5 is a cross-sectional view of the soft member 54 and the like. FIG. 5 shows the configuration of the upper side surface of the fan cover 52 and the vicinity thereof. The soft member 54 includes an upper surface vibration isolation portion 54 a in contact with the upper surface of the fan cover 52 and the duct 50. In the non-energized state of the electric blower 19, the thickness L1 of the top anti-vibration portion 54a is, for example, 5.5 mm.

  A convex portion 50 a is provided on the lower surface of the duct 50. The convex portion 50a contacts the upper surface vibration isolation portion 54a and presses the upper surface vibration isolation portion 54a downward when the electric blower is not energized or is energized. The thickness L2 of the upper surface vibration isolation portion 54a immediately below the convex portion 50a is, for example, 5.0 mm when the electric blower is not energized because the protrusion 50a bites into the upper surface vibration isolation portion 54a. When the electric blower 19 is not energized, the upper surface anti-vibration portion 54 a fills the space between the lower surface of the duct 50 and the upper surface of the fan cover 52.

  When the electric blower 19 is energized, its suction force causes the fan cover 52 to receive a force in the axial positive direction (upward). This force is exerted on the upper surface anti-vibration portion 54a to reduce the thickness of the upper surface anti-vibration portion 54a. Specifically, the portion of 5.5 mm is, for example, about 3 mm. The air is introduced from the space between the lower surface of the duct 50 and the upper surface of the fan cover 52 to the exhaust air passage 22 by completely filling the space between the lower surface of the duct 50 and the upper surface of the fan cover 52. It is possible to prevent it from In other words, the airtightness of the exhaust air passage 22 can be maintained.

  The soft member 54 includes a seal portion 54b. The seal portion 54 b is sandwiched between the duct 50 and the electric fan case 56 to be elastically deformed. The thickness L3 of the seal portion 54b is, for example, 2 mm or less, and the horizontal length W1 of the seal portion 54b is, for example, 4 mm or less.

  The soft member 54 includes a side anti-vibration portion 54 c. The side vibration isolation portion 54 c is provided between the side surface of the fan cover 52 and the inner wall of the electric blower case 56. Ribs 54 c ′ and 54 c ′ ′ are provided on portions of the side anti-vibration portion 54 c facing the electric fan case 56. The ribs 54 c ′ and 54 c ′ ′ are annular portions surrounding the fan cover 52. The ribs 54 c ′ and 54 c ′ ′ are provided to reduce the contact area between the soft member 54 and the electric blower case 56.

  The surface of the side anti-vibration portion 54c facing the fan cover 52 is a flat surface. Therefore, the side anti-vibration portion 54 c makes surface contact with the side surface of the fan cover 52. Also, the ribs 54 c ′ and 54 c ′ ′ of the side anti-vibration portion 54 c contact the electric blower case 56. As can be seen from FIG. 5, the area where the ribs 54 c ′ and 54 c ′ ′ of the side anti-vibration portion 54 c contact the electric blower case 56 is smaller than the area where the side anti-vibration portion 54 c contacts the fan cover 52.

  The outer diameter φA of the ribs 54c 'and 54c' 'is smaller than or equal to the inner diameter φB of the electric fan case 56. Therefore, if the outer diameter φA of the ribs 54c 'and 54c' 'is smaller than the inner diameter φB of the electric fan case 56, the electric fan case 56 will not be in contact with the ribs 54c' and 54c 'in a stationary state. If the outer diameter φA of the ribs 54c 'and 54c' 'is equal to the inner diameter φB of the electric fan case 56, the electric fan case 56 contacts the ribs 54c' and 54c 'in a stationary state. It is avoided that the ribs 54c 'and 54c' 'and the electric blower case 56 come in close contact in the stationary state. When the electric blower 19 is energized, vibration occurs in the radial direction in the fan cover 52. This vibration is absorbed by the ribs 54 c ′, 54 c ′ ′ hitting the electric fan case 56.

  The upper surface vibration isolation portion 54a, the seal portion 54b, and the side surface vibration isolation portion 54c including the ribs 54c 'and 54c' 'constitute an integrally formed soft member 54. The material of the soft member 54 is not particularly limited as long as it is a material having elasticity, but is, for example, rubber. The rubber is, for example, soft solid rubber or independently foamed rubber.

  By providing the ribs 54 c ′ and 54 c ′ ′, the contact area of the soft member 54 and the electric blower case 56 can be reduced as compared with the case where the electric blower case 56 contacts the soft member having no rib. As a result, vibration in the lateral direction of the fan cover 52 in the radial direction is less likely to propagate to the electric fan case 56.

  However, with the reduction of the contact area, or with the rib outer diameter φA being equal to or smaller than the case inner diameter φB, the exhaust of the electric blower may escape from between the duct 50 and the electric blower case 56. Therefore, in the first embodiment of the present invention, the provision of the seal portion 54b (a portion crushed by the duct 50 and the motor blower case 56) can prevent a gap from being generated between the duct 50 and the motor blower case 56. . By providing the seal portion 54b, it is not necessary to bring the ribs 54c ', 54c' 'and the electric blower case 56 into close contact with each other. Therefore, an air gap is provided between the ribs 54c 'and 54c' 'and the electric blower case 56, and the ribs 54c' and 54c '' contact the electric blower case 56 only when the fan cover 52 largely vibrates in the lateral direction. You may do so.

  FIG. 6 is a perspective view of an electric blower case or the like. A duct 50 is provided on the electric blower case 56. An exhaust air passage 22 appears above the duct 50. FIG. 7 is an exploded view of the configuration of FIG. The seal portion 54b of the soft member extends outward beyond the ribs 54c 'and 54c' '. The fan cover 52 is supported by the electric blower case 56 via the soft member 54 and the shock absorbing material 90 by inserting a screw through the hole h1 provided in the duct 50 and inserting the screw into the screw hole h2 of the electric blower case 56 Be done.

  FIG. 8 is a plan view of the inside of the main body. FIG. 9 is a cross-sectional view taken along line B-B of FIG. FIG. 9 shows the positions of the fan cover 52 and the electric fan case 56 when the electric fan is energized. As described above, when the electric blower 19 is energized, the fan cover 52 moves upward (axial positive direction) by the suction force (negative pressure). As a result, the bottom surface of the shock absorbing material 90 in contact with the recess 56 a of the electric blower case 56 is separated from the recess 56 a. In a state where the shock absorber 90 floats away from the recess 56a, at least a portion of the shock absorber 90 is in the area surrounded by the recess 56a. That is, the shock absorbing material 90 is prevented from rising too much and coming out of the area surrounded by the recess 56a. Thereby, the side surface of the shock absorbing material 90 opposes the inner wall of the recessed part 56a irrespective of the presence or absence of electricity supply of an electric blower.

  FIG. 10 is a cross-sectional view taken along line C-C of FIG. A protrusion 56 b is provided on the inner wall of the recess 56 a. The protrusion 56 b is a portion protruding from the inner wall of the recess 56 a toward the center of the recess 56 a. The projections 56 b are provided two by two on the four inner walls of the recess 56 a. When the electric blower is energized, not only the axial positive / negative direction and the radial left / right direction, but also a force in the rotational direction to rotate the fan cover 52 about the axis acts. When a force in the rotational direction acts on the fan cover 52 and the shock absorbing material 90 attached thereto, the shock absorbing material 90 contacts the convex portion 56 b. That is, the convex portion 56 b functions as a rotation stopper for the shock absorbing material 90 and the fan cover 52. In order to stop the rotation of the shock absorbing material 90 (the rotation of the fan cover 52) at the convex portion 56b, it is necessary to prevent the shock absorbing material 90 from coming out of the area surrounded by the concave portion 56a when the electric blower is energized. . In order to adjust the rising amount of the shock absorbing material 90, for example, the thickness or the area of the upper surface vibration isolation part 54a is adjusted.

  When the shock absorbing material 90 contacts the concave portion 56a with a large area without the convex portion 56b, vibrations in the axial positive / negative direction and in the radial lateral direction are transmitted from the cushioning material 90 to the concave portion 56a. However, the propagation of the vibration can be suppressed by limiting the contact between the shock absorbing material 90 and the electric fan case 56 to only the convex portion 56 b.

  The vacuum cleaner according to the first embodiment of the present invention mainly has two features. The first feature is that the vibration of the electric blower 19 is hard to propagate to the electric blower case 56. Specifically, the ribs 54c 'and 54c' 'are provided on the soft member 54 so that the fan cover can vibrate freely or substantially freely in the radial left and right direction. Since the rib outer diameter φA is equal to or less than the inner diameter φB of the electric fan case 56, the ribs 54c 'and 54c' 'do not strongly hit the electric fan case 56 even if the fan cover 52 vibrates in the lateral direction. Further, by providing the ribs 54c 'and 54c' ', the contact area between the soft member and the electric blower case can be made smaller than when the portion of the soft member facing the electric blower case 56 is formed flat. Therefore, it is possible to suppress the propagation of the vibration in the diameter left-right direction and the rotational direction of the electric blower 19 (fan cover 52) to the electric blower case 56.

  Since the ribs 54 c ′ and 54 c ′ ′ do not completely suppress the vibration of the fan cover 52, the fan cover 52 is in a state in which it can easily move in the radial direction. Therefore, there is a possibility that the fan cover 52 may rotate by receiving a force in the rotational direction. Therefore, as a rotation stop of the fan cover 52, the electric blower case 56 is provided with a recess 56a for accommodating the shock absorbing material 90. The shock absorbing material 90 to be rotated is stopped by the convex portion 56 b provided on the inner wall of the concave portion 56 a. By limiting the contact between the shock absorbing material 90 and the concave portion 56 a to only the convex portion 56 b, the vibration of the fan cover 52 can be hardly transmitted to the electric blower case 56.

  The force in the rotational direction of the fan cover 52 is also exerted on the soft member 54. However, by providing the ribs 54c ′ and 54c ′ ′, the contact area between the soft member 54 and the electric blower case 56 is reduced, so that a large force in the rotational direction is transmitted from the soft member 54 to the electric blower case 56. There is nothing to do.

  FIG. 11 is a graph showing measurement results of operating noise of the vacuum cleaner according to Embodiment 1 of the present invention. The frequency indicated by the arrow is the frequency of the sound produced by the vibration of the electric blower 19. The sound is generated by the vibration of the electric blower 19 mainly because the vibration is transmitted from the electric blower 19 to the electric blower case 56.

  FIG. 12 is a graph showing the measurement results of the operating noise of the vacuum cleaner according to the first comparative example. In the vacuum cleaner of the first comparative example, there is no rib in the soft member, and the convex portion (rotation stop) is formed in the concave portion of the electric blower case accommodating the shock absorbing material and the point that the entire side surface of the soft member contacts the inner wall of the electric blower case. In that the vacuum cleaner according to the first embodiment of the present invention is not provided. Therefore, the sound generated by the vibration of the electric blower indicated by the arrow is very loud. As can be seen by comparing FIGS. 11 and 12, the electric vacuum cleaner according to the first embodiment of the present invention can suppress the vibration of the electric fan case as compared with the first comparative example.

  The second feature is that it is possible to prevent the formation of a gap between the duct 50 and the electric blower case 56. Specifically, by providing the elastically deformed seal portion 54 b sandwiched between the duct 50 and the electric blower case 56, it is possible to prevent a gap from being formed between the duct 50 and the electric blower case 56. The second comparative example will be described before describing the significance. FIG. 13 is a cross-sectional view of a main body of a vacuum cleaner according to a second comparative example. The seal portion 94 is provided between the soft member 95 and the electric blower case 96. When the electric blower is energized, forces in the axial positive / negative direction and in the radial left / right direction are exerted on the seal portion 94 via the soft member 95. Therefore, the seal portion 94 may be damaged with time, and the seal portion 94 may be torn or deformed to form a gap between the duct 50 and the electric fan case 96. When a gap is created between the duct 50 and the motor blower case 96, and the exhaust of the motor blower is discharged from the gap, the exhaust is discharged outside the machine without passing through the filter 21, so Contaminate the air.

  On the other hand, the seal portion 54 b according to the embodiment of the present invention is sandwiched between the duct 50 and the electric blower case 56. The vibration of the fan cover 52 does not directly affect the duct 50 and the electric fan case 56, so these vibrations are small. Therefore, compared with the force exerted on the seal portion 94 of the second comparative example, the force exerted on the seal portion 54b according to the first embodiment of the present invention is very small. Therefore, since the seal portion 54 b is difficult to deteriorate with time, it is possible to prevent a gap from being formed between the duct 50 and the electric blower case.

  By having the first and second features, a sufficient vibration isolation effect can be obtained, and moreover, it can be prevented that a gap is formed between the duct and the case.

  Various modifications can be made to the electric vacuum cleaner according to Embodiment 1 of the present invention. In the first embodiment of the present invention, the shock absorbing material 90 floats from the recess 56 a of the electric blower case 56 while the electric blower 19 is energized. However, when the electric blower is not energized, the shock absorbing material is in contact with the recess, and when the electric blower is energized, the force exerted by the shock absorbing material on the recess is smaller than when the electricity blower is not energized. It may be configured as follows. That is, the buffer member may be in contact with the recess when the electric blower is energized. In this case, when the fan cover 52 receives a weak force in the axial positive direction, "the force of the shock absorbing material on the recess becomes smaller than when the electric blower is not energized". Thus, the contact pressure between the shock absorbing material and the electric blower case is weakened, so that the vibration transmitted from the shock absorbing material to the electric blower case can be reduced.

  The fan cover 52 may be configured by assembling a plurality of parts instead of one part. In the first embodiment of the present invention, the fan cover 52 is defined to cover both the motor and the fan. For example, it is conceivable to cover the fan with a fan cover and to cover the motor with a motor cover, but in such a case, it goes without saying that the fan cover and the motor cover correspond to the fan cover 52 according to Embodiment 1 of the present invention. .

  The anti-vibration effect may be enhanced by changing the number or shape of the ribs or changing the number or shape of the convex portions b of the electric fan case 56. The shape of the ribs 54c 'and 54c' 'may be a taper that narrows from the root to the tip. The tapered shape can reduce the contact area between the rib and the electric blower case. Alternatively, the tip of the rib may be sharpened to further reduce the contact area between the rib and the electric blower case.

  By providing both the ribs 54c 'and 54c' 'of the soft member 54 and the convex portion 56b of the electric blower case 56, the effect of suppressing the vibration of the electric blower case can be enhanced. However, in the case where vibration can be sufficiently suppressed by providing only one of them, one of the ribs 54c 'and 54c' 'and the convex portion 56b may be omitted.

  If it is required to suppress the vibration of the electric fan case and it is not required to prevent the gap from being formed between the duct and the electric fan case, the seal portion 54b may be omitted. On the other hand, it is required to prevent a gap from being formed between the duct and the electric blower case, and if the vibration suppression of the electric blower case is not required, the ribs 54c ′ and 54c ′ ′ and the convex portion 56b may be omitted. good.

  These modifications can be appropriately applied to the vacuum cleaner according to the following embodiment. In addition, since the vacuum cleaner which concerns on the following embodiment has much in common with Embodiment 1, it demonstrates focusing on difference with Embodiment 1. FIG.

Second Embodiment
FIG. 14 is a cross-sectional view showing a soft member 54 and the like according to the second embodiment. The seal portion 70 is provided as a separate component from the soft member 54. The seal 70 and the soft member 54 are separated. Therefore, since the seal portion 70 does not receive vibration from the soft member 54, deterioration of the seal portion 70 can be suppressed. In addition, even when the seal portion is initially provided as a part of the soft member 54, a state in which the soft member 54 and the seal portion 70 shown in FIG. Can be considered.

Third Embodiment
FIG. 15 is a cross-sectional view showing a soft member 54 and the like according to the third embodiment. Ribs 56 c are provided on the inner wall of the electric blower case 56. A rib 56 c is provided on a portion of the electric fan case 56 facing the side vibration isolation portion 54 c. Preferably, the electric fan case 56 and the rib 56c are integrally formed. The material of the electric blower case 56 and the rib 56c is, for example, plastic. When the fan cover 52 vibrates in the lateral direction of the diameter, the rib 56c is in contact with the side anti-vibration portion 54c to absorb the vibration.

  When the rib 56c is provided in the electric blower case 56, the inner diameter of the rib 56c is preferably equal to or larger than the outer diameter of the side vibration isolation part 54c.

Fourth Embodiment
FIG. 16 is a cross-sectional view showing a shock absorber 90 and the like according to the fourth embodiment. This figure corresponds to FIG. The protrusion 90 a was provided on the side surface of the shock absorbing material 90. When the cushioning material 90 receives a force in the rotational direction, the convex portion 90a and the inner wall of the concave portion 56a come in contact with each other.

  DESCRIPTION OF SYMBOLS 6 main body, 19 electric blower, 20, 21 filter, 22 exhaust air path, 50 duct, 50a convex part, 52 fan cover, 52a inlet, 52b exhaust port, 54 soft member, 54a top anti-vibration part, 54b seal part, 54c side vibration proofing part, 54c ', 54c' 'rib, 56 motor blower case, 56a concave part, 56b convex part, 56c rib, 70 seal part, 90 shock absorbing material, 90a convex part

Claims (4)

With an electric blower,
A fan cover that covers the electric blower and has an inlet through which the air taken into the electric blower passes, and an exhaust port through which the exhaust of the electric blower passes;
An electric blower case which covers the fan cover and provides an air path leading to the exhaust port;
A duct providing an air path leading to the inlet;
A seal portion elastically deformed between the duct and the electric fan case ;
A side vibration control unit in contact with the side surface of the fan cover and the electric blower case;
And a top anti-vibration portion in contact with the upper surface of the fan cover and the duct,
The upper surface vibration isolation portion, the side surface vibration isolation portion, and the seal portion are integrally formed ,
The vacuum cleaner is characterized in that the seal portion is above the side surface vibration isolation portion and outside the fan cover from the top surface vibration isolation portion .   And a top anti-vibration portion in contact with the upper surface of the fan cover and the duct,
  The said duct was equipped with the convex part which pushes down the said upper surface anti-vibration part in the position which opposes the said upper surface anti-vibration part, when not supplying with electricity to the said electric blower. Vacuum cleaner.   The vacuum cleaner according to claim 1 or 2, wherein the seal portion is formed of rubber.   The thickness of the said seal | sticker part is 2 mm or less, and the length of the horizontal direction of the said seal | sticker part is 4 mm or less, The vacuum cleaner of any one of Claims 1-3 characterized by the above-mentioned.

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