JP2017029524A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vacuum cleaner capable of efficiently processing air used for cooling by sufficiently cooling a power code wound around a cord reel.SOLUTION: A vacuum cleaner which includes an air sucking electric blower, a power code, and a cord reel having a winding part to wind the power code around is such that: the winding part is provided with a hole; there is provided an air flow channel which passes the hole of the winding part to the center direction of the cord reel, and extends to the suction port of the electric blower; there is included a tube which forms a part of the flow channel and connects the electric blower and the cord reel; and the tube can be formed by blow molding.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a vacuum cleaner.

  Patent Document 1 discloses a vacuum cleaner in which a power cord is wound around a cord reel.

JP 2014-030612 A

  The upper limit of the power cord temperature is defined as a standard value. In order to suppress the deterioration of the resin film of the power cord, such a standard value is set to 75 ° C., for example. Therefore, it is necessary to cool the power cord wound around the cord reel. The conventional cooling method has a problem that it is difficult to cool the contact portion between the cord reel and the power cord and the vicinity thereof because wind is applied only to the surface (outside) of the power cord that has been wound several times.

  The present invention has been made to solve the above-described problems, and is an electric cleaning that can sufficiently cool a power cord wound around a cord reel and efficiently process the air used for cooling. The purpose is to provide a machine.

  The vacuum cleaner according to the invention of the present application includes an electric blower that sucks air, a power cord, and a cord reel having a winding portion around which the power cord is wound, and the winding portion is provided with a hole. An air flow path is provided through the hole of the winding portion toward the center of the cord reel and reaching the suction port of the electric blower, and forms a part of the flow path to form the electric blower and the cord. It has a tube connecting reels, and the tube is formed by blow molding.

  According to the present invention, since the negative pressure of the electric blower is used to generate a wind from the outside of the cord reel toward the center of the cord reel, a portion of the power cord wound around the cord reel is near the center of the cord reel. Can be sufficiently cooled, and the air that has cooled the cord reel can be efficiently sent to the electric blower.

It is a perspective view of the electric vacuum cleaner in embodiment. It is a side view of the main body of a vacuum cleaner. It is sectional drawing of the main body of a vacuum cleaner. It is a partial exploded view of a main body. It is an exploded view of a cord reel. It is a section perspective view of a cord reel. It is a top view of a winding part and a power cord. It is sectional drawing of an axial part. It is a front view of a shaft part. It is sectional drawing, such as a parallel part and a shaft part. It is a top view which shows the inside of a main body. It is a perspective view of a tube. It is the top view which looked at the main body of the state of FIG. 11 from back. It is sectional drawing of a main body. Example of use of a vacuum cleaner using the present invention

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

Embodiment.
FIG. 1 is a perspective view showing a vacuum cleaner 1 according to an embodiment of the present invention. The vacuum cleaner 1 shown in FIG. 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 includes a connection 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 can be attached to and detached from the extension pipe 3. The extension pipe 3 can be expanded and contracted. 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 can be attached to and detached 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 part held by a person who performs cleaning to move the suction head 2. An operation switch 8 is provided on the operation 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 main body 6. A portion of the suction hose 5 other than the end portion 5a has a bellows shape and bends in an arbitrary direction. The suction hose 5 can be attached to and detached from the main body 6. The end 5a of the suction hose 5 is formed in a cylindrical shape by a plurality of hard plastic members, for example. 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.

  FIG. 2 is a side view of the main body 6 of the vacuum cleaner 1. The main body 6 has a function of separating garbage from air containing garbage. The main body 6 has a function of collecting separated garbage. The main body 6 includes, for example, a suction unit 9 and a dust collection unit 10. The dust collection unit 10 can be attached to and detached from the suction unit 9.

  FIG. 3 is a cross-sectional view of the main body 6 of the vacuum cleaner 1. In the following description, the vertical direction is specified based on the state shown in FIG. Regarding the front-rear direction, the left side of FIG. The suction unit 9 includes a main body case 11, a hose connection portion 12, a handle 13, a wheel 14, a front wheel 15, and a power cord 16 (the power cord is shown in FIG. 2).

  The main body case 11 includes a device case 17 and a dust collection case 18, for example. Various devices are provided inside the device case 17. For example, the suction unit 9 includes an electric blower 19, filters 20 and 21, a cord reel, and a control device inside the device case 17. Further, 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 and 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 collecting case 18 has, for example, a cylindrical shape in which one end is closed. The dust collection case 18 has a central axis arranged obliquely and opens obliquely upward. The dust collection case 18 protrudes from the upper part to the front side from the upper part. The dust collection unit 10 is accommodated in the dust collection case 18. The dust collection unit 10 can be attached to and detached from the dust collection case 18.

  The end portion 5 a of the suction hose 5 is connected to the hose connection portion 12. The hose connection part 12 is provided in the upper part of the main body case 11. For example, the hose connection portion 12 is disposed above the half height 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 upper portion of the dust collection case 18. The hose connection portion 12 is disposed so as to protrude forward from the peripheral wall of the dust collection case 18.

  A straight hollow portion 12 a into which the end portion 5 a of the suction hose 5 is inserted is formed in the hose connection portion 12. When the suction hose 5 is connected to the hose connection portion 12, the end portion 5 a protrudes obliquely upward from the hose connection portion 12. The handle 13 is a part that the user has when lifting the main body 6. For example, the user lifts the main body 6 with the handle 13 when cleaning the stairs or the like. The handle 13 is provided on the main body case 11. The handle 13 has a bar-shaped grip portion 13a that is gripped by the user.

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

  The front wheel 15 is rotatably provided in the main body case 11. In the example shown in the present embodiment, the front wheel 15 is disposed below the dust collection case 18. The power cord 16 is wound around a cord reel provided inside the device case 17. When the power cord 16 is connected to an external power source, electric power is supplied from the power cord to the electric blower 19, and devices such as the electric blower 19 are energized. The electric blower 19 generates an air flow in the air passage formed in the electric vacuum cleaner 1. The air passage formed in the vacuum cleaner 1 includes, for example, an air passage for guiding air including dust to the main body 6 from the outside, an air passage formed in the dust collection unit 10, and an exhaust air passage 22. When the power cord 16 is connected to the power source, the electric blower 19 performs a suction operation that is set in advance according to the operation on the operation switch 8.

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

  The air containing dust flowing into the main body 6 is sent to the dust collection unit 10 through the hollow portion 12a of the hose connection portion 12. The air flow generated inside the dust collection unit 10 will be described later. The air that flows out from 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 that has 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 dust from air containing dust. The dust collection unit 10 separates the dust by centrifugal force by swirling the air containing the dust at a high speed. That is, the dust collection unit 10 has a cyclone separation function. The dust collection unit 10 collects the separated garbage and temporarily stores it. Clean air flows from the dust collection unit 10 into the exhaust air passage 22.

  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, the swirl chamber 24, the inflow air passage 25, the zero-order dust collection chamber 26, the primary dust collection chamber 27, and the 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 part of the swirl chamber 24 has a truncated cone shape whose diameter decreases as it goes downward. The side wall forming the swirl chamber 24 has a circular cross section in a direction perpendicular to the central axis of the swirl chamber 24. An inflow port 29 is formed in the upper part of the side wall forming the swirl chamber 24. The inflow air passage 25 communicates with the swirl chamber 24 through the inflow port 29. The inflow air passage 25 is an air passage for guiding the air including the dust that has passed through the suction hose 5 and the like to the swirl chamber 24. The inflow air passage 25 opens at the peripheral wall of the dust collection unit 10. This opening is the unit inlet 30 of the dust collection unit 10. The unit inlet 30 is an opening for taking in air containing dust into the dust collection unit 10. The air including dust that has passed through the suction hose 5 and the like flows into the inflow air passage 25 from the unit inlet 30. The air containing the dust flowing into the inflow air passage 25 passes through the inflow air passage 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 in the side wall forming the swirl chamber 24. The zero-order opening 31 is formed downstream from the inflow port 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 so as 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 a zero-order dust collection chamber 26.

  In the outflow pipe protruding into the swirl chamber 24, there is an outlet 33 formed by a large number of fine holes. The outflow air passage 28 communicates with the swirl chamber 24 via the outflow port 33. The outflow air passage 28 is an air passage for letting the air in the swirl chamber 24 out of the dust collection unit 10. The outflow air passage 28 opens at the peripheral wall of the dust collection unit 10. This opening is the unit outlet 34 of the dust collection unit 10. The unit outlet 34 is an opening through which air flows out from the dust collection unit 10. The air in the swirl chamber 24 flows into the outflow air passage 28 from the outlet 33. The air that has flowed into the outflow air passage 28 passes through the outflow air passage 28 and out of the dust collection unit 10 through the unit outlet 34. 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 specifically described. When the electric blower 19 starts the suction operation, the air including the dust sucked into the suction head 2 passes through the unit inlet 30 and flows into the inflow air passage 25 as described above. The air containing the dust flowing into the inflow air passage 25 passes through the inflow air passage 25 and flows into the swirl chamber 24 from the inflow port 29. At this time, the 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 flows into the swirl chamber 24 from the inflow port 29 turns in a direction set in advance in the swirl chamber 24. Thereby, a swirl airflow is formed in the swirl chamber 24. The whirling airflow flows downward due to the path structure and gravity while forming a forced vortex region near the central axis and a free vortex region outside the central vortex region.

  Centrifugal force acts on the dust contained in the swirling airflow. 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 zeroth-order opening 31 when reaching the height of the zeroth-order opening 31. Garbage α that has passed through the zero-order opening 31 is sent to the zero-order dust collection chamber 26. As a result, the garbage α falls into the zero-order dust collection chamber 26 and is collected.

  Garbage that has not entered the zero-order dust collection chamber 26 from the zero-order opening 31 moves further downward while turning. Relatively small waste β such as sand dust and fine fiber waste passes through the primary opening 32. Thereby, the garbage β falls into the primary dust collecting chamber 27 and is collected.

  When the swirl airflow reaches the lowermost part of the swirl chamber 24, the traveling direction of the swirl airflow is changed upward. As a result, an updraft is formed along the central axis of the swirl chamber 24. Garbage α and 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 swirl 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 contain a slight amount of dust. In order to remove the dust, the air that has entered the exhaust air passage 22 passes through the filter 20 by the suction force of the electric blower 19. The air that has passed through the filter 20 reaches the electric blower 19. The air discharged from the electric blower 19 (indicated by the arrow D1) passes through the filter 21 and then passes under the electric blower 19 (indicated by the arrows D2, D3, and D4) and is exhausted from the exhaust port 23 to the outside. (Indicated by the arrow D5).

  FIG. 4 is a partially exploded view of the main body 6. A cord reel 50 around which the power cord 16 is wound is rotatably attached to the device case 17. The wheel 14 does not contact the cord reel 50 but is rotatably attached to the device case 17 so as to cover the cord reel 50. In a state where the wheel 14 is attached to the device case 17, the cord reel 50 is not exposed to the outside.

  FIG. 5 is an exploded view of the cord reel 50 and the like. A power cord 16 is wound around the cord reel 50. The cord reel 50 includes a first portion 51 and a second portion 52. A shaft portion 53 is sandwiched between the first portion 51 and the second portion 52. The first portion 51 is an annular portion adjacent to the wheel 14. The second portion 52 is an annular portion adjacent to the electric blower 19. The shaft portion 53 is a shaft that is inserted into the center of the first portion 51 and the second portion 52. The shaft portion 53 functions as the shaft of the cord reel 50. The cord reel 50 can rotate with respect to the shaft portion 53. One end of the shaft portion 53 fits into the first portion 51 and the other end of the shaft portion 53 fits into the second portion 52, so that the first portion 51 and the second portion 52 are maintained facing each other.

  FIG. 6 is a cross-sectional perspective view of the cord reel 50 and the like. A shaft portion 53 is fitted in the center of the first portion 51 and the second portion 52. The cord reel 50 includes a winding unit 55. The winding portion 55 includes a bottom portion 51 a of the first portion 51 and a bottom portion 52 a of the second portion 52. The bottom portions 51a and 52a are cylindrical. When the bottom part 51a and the bottom part 52a contact, these form a substantially flat surface. The power cord 16 is wound around the winding portion 55. The power cord 16 contacts the inner power cord 16a that is in contact with or very close to the winding portion 55 and the inner power cord 16a that is not in contact with or very close to the winding portion 55 or a power cord outside the inner power cord 16a. An outer power cord 16b that contacts is provided.

  The winding portion 55 is formed with a hole 55A. FIG. 7 is a plan view of the winding unit 55 and the power cord 16. A plurality of holes 55 </ b> A are formed in the winding unit 55. A plurality of holes 55A are preferably formed at equal intervals. The winding portion 55 includes a convex portion 55B that is convex outward. The convex portions 55B are provided at arbitrary intervals. By contacting the power cord 16 with the convex portion 55B, the contact area between the winding portion 55 and the power cord 16 can be reduced as compared with the case where there is no convex portion. As a result, a gap is formed between the winding unit 55 and the power cord 16. This gap promotes heat dissipation of the power cord 16.

  Returning to the description of FIG. The cord reel 50 includes a guide portion 56. The guide part 56 includes a first annular part 51 b that is a part of the first part 51 and a second annular part 52 b that is a part of the second part 52. The first annular part 51b is connected to the bottom part 51a, and the second annular part 52b is connected to the bottom part 52a. The guide portion 56 guides the position of the power cord 16 so that the power cord 16 is wound around the winding portion 55 of the cord reel.

  The cord reel 50 includes a ventilation portion 57. The ventilation part 57 includes a first side wall 51 c that is a part of the first part 51 and a second side wall 52 c that is a part of the second part 52. The first side wall 51c is connected to the bottom 51a. The second side wall 52c is connected to the bottom 52a. The first side wall 51c and the second side wall 52c face each other. There is a gap 57A between the first side wall 51c and the second side wall 52c. The gap 57A connects the hole 55A of the winding part 55 and the opening 53a of the shaft part 53. The gap 57 </ b> A is a space surrounding the shaft portion 53.

  An opening 53 a is formed on the side surface of the shaft portion 53. The shaft portion 53 is formed with a hollow region 53b that extends in the longitudinal direction through the opening 53a. FIG. 8 is a cross-sectional view of the shaft portion. The shaft portion 53 is provided with an opening 53a and a hollow region 53b connected to the opening 53a. A plurality of openings 53a are preferably provided at equal intervals so as to surround the hollow region 53b. The hollow region 53b is open upward. Therefore, the air that has reached the hollow region 53b from the opening 53a is directed upward (in the longitudinal direction) of the hollow region 53b.

  FIG. 9 is a front view of the shaft portion. The shaft portion 53 includes a flange portion 53A. A cylindrical portion 53B (with an opening formed) is provided on the flange portion 53A. An upper end portion 53C having an open top is provided on the tubular portion 53B. Since the upper end portion 53C is thinner than the cylindrical portion 53B, the upper surface 53B 'of the cylindrical portion 53B appears on the surface.

  As can be seen by referring to FIG. 9 and FIG. 6, the lower surface of the flange portion 53 </ b> A and the first side wall 51 c are in contact with each other. The second side wall 52c is in contact with the upper surface of the flange portion 53A. The second side wall 52 c includes a parallel part 52 c ′ extending in a direction parallel to the longitudinal direction of the shaft part 53 at a part thereof. The parallel portion 52c 'is in contact with the upper surface of the flange portion 53A and the cylindrical portion 53B. The parallel portion 52 c ′ is provided with a hole so that the parallel portion 52 c ′ does not completely block the opening 53 a of the shaft portion 53. Therefore, the opening 53a of the cylindrical portion 53B is connected to the gap 57A.

  FIG. 10 is a cross-sectional view of the parallel portion 52c ′ of the second side wall 52c, the shaft portion 53, and the like. The parallel part 52c 'is in contact with the shaft part 53 in a rotatable manner. A plurality of holes 70 are formed in the parallel portion 52c '. A plurality of the holes 70 are preferably formed at equal intervals. The opening ratio (opening width) of the hole 70 is smaller than the opening ratio (opening width) of the opening 53 a of the shaft portion 53. Therefore, the hole 70 of the parallel portion 52 c ′ and the opening 53 a of the shaft portion 53 are connected regardless of the rotation state of the cord reel 50 with respect to the shaft portion 53.

  Since FIG. 10 is a cross-sectional view, the power cords 16A, 16B, and 16C appear discontinuous. However, actually, the power cord 16A is connected to the power cord 16B, and the power cord 16B is connected to the power cord 16C. FIG. 10 shows a convex portion 55 </ b> B formed on the winding portion 55.

  Returning to the description of FIG. A terminal receiving member 60 is placed on the upper surface 53B ′ (see FIG. 9 for the upper surface 53B ′) of the cylindrical portion 53B. A cover 62 is placed on the terminal receiving member 60. The terminal receiving member 60 and the cover 62 cover the terminals so that the terminals connected to the power cord 16 are not exposed to the outside. Such terminals are on the top surface of the second sidewall 52c. The terminal receiving member 60 and the cover 62 are collectively referred to as a terminal cover 64. The cover 62 includes a cover portion 62a that covers the terminals and a guide portion 62b.

  A guide hole 62 c connected to the hollow region 53 b of the shaft portion 53 is formed in the guide portion 62 b. The guide hole 62 c is a space extending from the center of the cord reel 50 toward the outer periphery of the cord reel 50. The distal end portion of the guide portion 62b has a cylindrical shape.

FIG. 11 is a plan view showing the inside of the main body 6. FIG. 13 is a plan view of the main body in the state of FIG. 11 as viewed from the rear. A locking member 80 is provided inside the main body 6. The locking member 80 is provided to fix the position of the electric blower 19 and to secure a flow path for air sucked into the electric blower 19. The locking member 80 includes a connecting portion 80 a in which a connecting hole leading to the suction port of the electric blower 19 is formed. The connecting portion 80a is also shown in FIG.
The electric blower 19 and the cord reel 50 are provided adjacent to each other so as to be adjacent to the left and right. In the case of the present embodiment, when the main body 6 is viewed from the rear, the cord reel 50 is located on the left side of the electric blower 19 fixed by the locking member 80.
And the connection part 80a is protruded and formed toward the back from the locking member 80, and the connection hole is opened toward the back. Further, the guide portion 62b is also formed to protrude rearward from the cover 62.
By being configured in this way, the connecting part 80a and the guide part 62b are located adjacent to each other in a state of protruding rearward. That is, the connecting portion 80a and the guide portion 62b are adjacent to each other in the state of facing the same direction. In the present embodiment, the connecting portion 80a is located above the guide portion 62b.

A tube 90 is shown in FIG. The tube 90 is U-shaped (U-shaped), and one end is connected to the connecting portion 80a and the other end is connected to the guide portion 62b. The tube 90 is connected to the connecting portion 80a and the guide portion 62b, thereby connecting the suction port of the electric blower 19 and the guide hole 62c.
In addition, since the connection part 80a and the guide part 62b are adjacent in the state which faced the same direction, when attaching the tube 90, attachment work can be performed from the same direction and workability | operativity is good.
Moreover, the part connected to the tube 90 of the connection part 80a and the guide part 62b is comprised so that a shape may differ, respectively, or a magnitude | size may differ. And the end connected to the connection part 80a of the tube 90 is comprised in the shape which can be connected to the connection part 80a. Moreover, the end connected to the guide part 62b of the tube 90 is comprised in the shape which can be connected to the guide part 62b. That is, the one end and the other end of the tube 90 have different shapes by making them connectable to the connecting portion 80a and the guide portion 62b, respectively.
In this way, by configuring the connecting portion 80a, the guide portion 62b, and the tube 90, a mistake in attaching the tube 90 to the connecting portion 80a and the guide portion 62b is prevented.
Further, the connection of the tube 90 to the connecting portion 80a and the guide portion 62b is locked by fitting. In the tube 90, a parting line 90a is formed at a connection portion so as to be fitted to the connecting portion 80a and the guide portion 62b. Thereby, prevention of drop-off of the tube 90 from a connection position and temporary fixation of the tube 90 can be performed easily.
Further, by providing reinforcing ribs 90b on the parting line 90a, the parting line 90a is reinforced, and the connection of the tube 90 to the connecting part 80a and the guide part 62b is further strengthened.
Further, the tube 90 is provided with a protruding portion 90c protruding from the side surface between both ends. An opening 90d is formed in the protrusion 90c. After connecting the tube 90 to the connecting portion 80a and the guide portion 62b, the tube 90 is fixed to the locking member 80 by inserting a screw 90e into the opening 90d.
Moreover, after connecting the tube 90 to the connection part 80a and the guide part 62b, you may provide the rib which hold | suppresses a tube in the attachment direction of the tube 90 on the opposite side to an attachment position. Thereby, dropping of the tube 90 can be prevented.

The tube 90 is preferably formed of plastic. The plastic material may be a lightweight material LDPE (low density polyethylene) and the tube 90 may be used. Plastic is a material having a certain degree of hardness. Therefore, when the tube 90 is formed of plastic, it is possible to prevent the tube from being bent or dented to block the air passage. A perspective view of the tube 90 is shown in FIG.
Here, when the U-shaped tube 90 is formed by injection molding, it is necessary to remove the tube 90 which is a molded product from the mold, and it is necessary to form the tube 90 with a certain degree of flexibility. However, as in the present embodiment, the tube 90 forms a flow path of air that reaches the suction port of the electric blower 19, so that negative pressure (pressure by which the tube 90 is crushed by the atmosphere) acts. The tube formed by injection molding may not be able to secure the strength to withstand negative pressure.
In addition, it is possible to form a plurality of parts by injection molding and assemble these to form a tube, but the number of parts increases and work efficiency deteriorates, and the tube is a part through which air flows, It is necessary to take measures to prevent airflow leakage from the connecting part between the parts.
Therefore, the tube 90 is preferably formed by blow molding. By forming the tube 90 by blow molding, it becomes easy to obtain a strength capable of preventing the tube from being bent or dented.
Moreover, the tube 90 is good to form integrally. By forming integrally, the joint in the tube 90 can be eliminated, and the inflow of air from other than the connection portion can be prevented inside the tube 90. Thereby, the air which cooled the power cord 16 can be efficiently flowed toward the electric blower 19.

  The suction wind by the electric blower will be described. The arrows shown in FIG. 3 indicate suction air from the electric blower and exhaust air from the electric blower. As shown in FIG. 3, a dust collection unit 10 is connected to the suction hose 5. Dust and air are separated by the dust collection unit 10. The relatively clean air reaches the exhaust air passage 22 via the outflow air passage 28. The air in the exhaust air passage 22 passes through the filter 20 before being sucked into the electric blower 19. The filter 20 collects dust in the air from the dust collection unit 10 toward the electric blower 19. The filter 20 is provided in order to prevent dust from entering the electric blower 19.

  The air that has passed through the filter 20 is sucked into the electric blower 19 through the space 91 immediately before the electric blower. The connecting portion 80a of the locking member 80 is connected to the space 91 immediately before the electric blower. That is, the connecting portion 80 a is provided between the filter 20 and the electric blower 19.

  As shown in FIGS. 11 and 13, one end of a tube 90 is connected to the connecting portion 80a, and the other end of the tube 90 is connected to the guide portion 62b. As shown in FIG. 6, the guide hole 62 c in the guide portion 62 b is connected to the hollow region 53 b in the shaft portion 53. The hollow region 53b is connected to the gap 57A through the opening 53a. The gap 57 </ b> A is connected to the hole 55 </ b> A of the winding unit 55.

  Therefore, when the electric blower 19 operates, air is supplied into the main body from between the wheels 14 or between the wheels 14 and the device case 17 as indicated by an arrow A0 in FIG. Then, the air travels in the directions of arrows A1, A2, A3, A4, and A5 in FIG. 6, further travels in the directions of arrows A6 and A7 in FIG. 11, and is sucked from the suction port of the electric blower 19.

  Therefore, it is possible to create an air flow that passes between the power cords 16 of FIG. 6 and reaches the hole 55A of the winding unit 55. Since this air is mainly supplied from between the wheel 14 and the device case 17, air having a temperature equivalent to that of the outside air hits the power cord 16. In addition, since the air flow is directed from the outside to the inside of the cord reel 50, the entire power cord 16 can be blown. That is, not only the outer power cord 16b but also the inner power cord 16a can be air-cooled. Therefore, a portion of the power cord 16 wound around the cord reel 50 that is close to the center of the cord reel 50 can be sufficiently cooled.

  The air flow indicated by the arrow A2 (see FIG. 6) extends from the plurality of holes 55A of the winding portion 55 to the opening 53a of the shaft portion via the gap 57A. In plan view, this air flows in the direction of arrow A2 in FIG. FIG. 10 also shows an arrow A2. FIG. 10 shows that the air traveling in the direction of the arrow A2 passes through the hole 70 formed in the parallel portion 52c ′ that is a part of the cord reel and the opening 53a of the shaft portion 53.

  The air flow indicated by the arrow A3 (see FIG. 6) is such that the air that has entered from the opening 53a travels through the hollow region 53b in the direction of the terminal cover 64.

  The air flow indicated by arrows A4 and A5 extends from the open upper end of the shaft 53 to the tip of the guide hole 62c. Since the guide hole 62c is provided by providing the guide portion 62b in the cover 62, the number of parts does not increase. In FIG. 6, the guide portion 62 b (guide hole 62 c) is configured by both the cover 62 and the terminal receiving member 60, but the guide portion may be configured by only the cover 62. By providing the guide hole somewhere in the terminal cover 64, it is possible to provide a necessary flow path while avoiding an increase in the number of parts.

  The air flow indicated by arrows A6 and A7 (see FIG. 11) proceeds from the guide hole through the tube 90 to the connecting portion 80a. As shown in FIG. 3, the air in the space just before the electric blower 91 is sucked by the electric blower 19, whereby the air in the connecting portion 80 a is sucked.

  By the way, since the exhaust of the electric blower 19 is air that has passed through the electric blower 19, the temperature is higher than the intake air of the electric blower 19. For example, the exhaust temperature is 60 ° C., and the intake air temperature is about the same as the outside air temperature (for example, 30 ° C.). Since the vacuum cleaner according to the embodiment of the present invention cools the power cord 16 using the intake air of the electric blower, the power cord 16 can be sufficiently cooled compared to the case where the exhaust is used. Further, since it is difficult to think that a lot of dust is contained in the outside air, it is not necessary to provide a filter in the air path that reaches the suction port of the electric blower 19 via the power cord 16.

  Moreover, since the connection part 80a is provided between the filter 20 and the electric blower 19, even if the filter 20 in FIG. 3 is clogged, the flow rate of the air that cools the power cord 16 does not change. Therefore, the power cord 16 can be cooled stably.

  The exhaust of the electric blower 19 will be described. Exhaust from the electric blower 19 proceeds in the direction of the arrow D1 in FIG. Then, it progresses to the direction of arrow D2, passes under the electric blower 19 as shown by arrows D3 and D4, and is exhausted outside from the exhaust port 23. As described above, the exhaust is relatively hot, so that the exhaust does not hit the power cord 16.

  FIG. 14 is a cross-sectional view of the main body 6. An exhaust passage 112 is provided below the electric blower 19. In FIG. 14, the exhaust flow path 112 is hatched. In FIG. 3, the exhaust passage 112 is a region through which air indicated by arrows D3 and D4 flows. O-rings 100 and 101 are provided so that air in the exhaust passage 112, which is a region through which exhaust passes, does not enter the area that houses the cord reel. The O-rings 100 and 101 are elastically deformed by being sandwiched between the lower case 110 and the locking member 80. Instead of the O-rings 100 and 101, any sealing material formed of rubber or the like may be used. Thus, by blocking (separating) the space where the cord reel 50 is provided from the exhaust passage 112 through which the exhaust air of the electric blower 19 passes, it is possible to prevent the exhaust from warming the power cord 16.

  A substrate 120 is provided in the main body 6. The board 120 is mounted with, for example, a microcomputer that controls the electric blower 19. The space provided with the substrate 120 is blocked (separated) from the exhaust passage 112 through which the exhaust air from the electric blower 19 passes. The blocking means is not particularly limited, but for example, an O-ring may be used. If the substrate 120 is exhausted, the substrate may become hot. However, in the embodiment of the present invention, the space in which the substrate 120 is formed is blocked from the exhaust passage 112 so that the substrate 120 is not exhausted. Therefore, it can prevent that the board | substrate 120 becomes high temperature.

  In particular, when a three-terminal regulator is provided on the substrate, it is important not to exhaust the substrate because the substrate tends to become hot. If the substrate is cooled by exhaust, the substrate may be contaminated by the exhaust, or moisture contained in the exhaust may cause a short circuit of the substrate circuit.

  A heat sink 122 shown in FIG. 14 is connected to the substrate 120. This heat sink 122 was positioned in the space 91 immediately before the electric blower. Thereby, since the heat sink 122 can be cooled by the intake air of the electric blower 19, the substrate 120 can be sufficiently cooled.

  An important feature of the electric vacuum cleaner according to the embodiment is that the air flow path passes through the hole 55A of the winding portion 55 shown in FIG. 6 toward the center of the cord reel 50 and reaches the suction port of the electric blower. Is provided. Thereby, the air sucked into the electric blower 19 from the outside can be applied to the entire power cord 16. The vacuum cleaner according to the embodiment of the present invention can be modified as appropriate without departing from this characteristic. For example, a part described as one part can be integrated with another part, or a part described as a plurality of parts can be made into one component. Further, the terminal cover 64 may be omitted, and the tube may be directly attached to the shaft portion 53, or a guide portion that is a separate component from the terminal cover 64 may be provided.

By configuring as described above, the negative pressure of the electric blower 19 is used to create a wind from the outside of the cord reel toward the center of the cord reel. Therefore, among the power cords 16 wound around the cord reel, the cord reel It is possible to sufficiently cool the portion close to the center of the air and efficiently send the air that has cooled the cord reel to the electric blower 19.
The airflow discharged from the electric blower 19 passes through the filter 21 and is all discharged from the exhaust port 23 to the outside of the main body 6 (the room being cleaned). That is, the airflow discharged from the electric blower 19 is not exhausted in a distributed manner from the exhaust port and the outlet of the power cord as in the prior art, but is exhausted from the exhaust port 23 in a concentrated manner. Yes.

Thus, since the vacuum cleaner 1 of this Embodiment has the structure which exhausts exhausted to the main body 6 concentrates and exhausts from the exhaust port 23, the suction hose 5 is made into the exhaust port 23 like FIG. By attaching a blower attachment 60 for performing a blower to the tip of the suction hose 5, the suction hose 5 guides the exhaust to the blower attachment 60, and exhausts the blower from the blower attachment 60 and uses the exhaust efficiently. It can be used as a used blower.
The blower attachment 60 is configured such that the opening side at the tip is narrowed, the flow velocity of the airflow to be blown out is increased, and dust is easily blown away.
In addition, although the form of FIG. 14 uses the suction hose 5 in the part from the exhaust port 23 to the blower attachment 60, you may use the exclusive hose for blowers.

  DESCRIPTION OF SYMBOLS 1 Vacuum cleaner, 16 Power cord, 16a Inner power cord, 16b Outer power cord, 17 Equipment case, 19 Electric blower, 20,21 Filter, 50 Cord reel, 51 First part, 52 Second part, 52c 'Parallel part 53 shaft part 55 winding part 55A hole 55B convex part 56 guide part 57 ventilation part 62b guide part 62c guide hole 62 cover 64 terminal cover 80 locking member 80a connecting part 90 Tube, 90a bellows, 91 space just before electric blower, 112 exhaust flow path, 120 substrate, 122 heat sink

Claims (13)

An electric blower that sucks air;
A power cord,
A cord reel having a winding portion around which the power cord is wound,
The winding portion is provided with a hole,
Through the hole of the winding unit, an air flow path is provided that extends toward the center of the cord reel and reaches the suction port of the electric blower.
A tube that forms part of the flow path and connects the electric blower and the cord reel;
The vacuum cleaner, wherein the tube is formed by blow molding. The shaft functioning as a shaft of the cord reel, having an opening on a side surface and having a hollow region extending in the longitudinal direction through the opening,
The vacuum cleaner according to claim 1, wherein a gap that connects the hole and the opening is formed in the cord reel. The cord reel includes a parallel portion that rotatably contacts the shaft portion,
A hole is provided in the parallel part,
The electric vacuum cleaner according to claim 2, wherein the hole of the parallel portion and the opening of the shaft portion are connected regardless of a rotation state of the cord reel with respect to the shaft portion.   The vacuum cleaner according to claim 1, wherein the winding unit includes a convex portion that contacts the power cord. A terminal cover covering the terminals connected to the power cord;
The vacuum cleaner according to claim 2, wherein the terminal cover includes a guide portion in which a guide hole connected to the hollow region of the shaft portion is formed. A fixing member having a connecting portion in which a position of the electric blower is fixed and a connecting hole leading to a suction port of the electric blower is formed,
The vacuum cleaner according to claim 5, wherein the tube is connected to the connecting portion and the guide portion to connect the suction port of the electric blower and the guide hole to form the flow path. . A suction hose through which air containing dust passes,
A dust collecting unit connected to the suction hose and separating dust and air;
The filter which collects the dust of the air which goes to the said electric blower from the said dust collection unit, The said connection part was provided between the said filter and the said electric blower. Electric vacuum cleaner.   The vacuum cleaner according to claim 6, wherein the guide portion and the connecting portion are arranged adjacent to each other and face the same direction.   The vacuum cleaner according to any one of claims 6 to 8, wherein the tube is locked by fitting to the connecting portion and the guide portion.   The vacuum cleaner according to any one of claims 6 to 9, wherein portions of the guide portion and the communication portion connected to the tube have different shapes or sizes.   The vacuum cleaner according to any one of claims 6 to 10, wherein the tube is provided with a protrusion for fixing to the locking member. The vacuum cleaner according to any one of claims 1 to 11, wherein a reinforcing rib is provided in a parting line of the connecting portion of the tube.
Effect: Parting line reinforcement.   The vacuum cleaner according to any one of claims 1 to 12, wherein a material of the tube is low density polyethylene.