JP2011030636A - Vacuum cleaner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vacuum cleaner with improved silence. <P>SOLUTION: The vacuum cleaner includes respective fixing parts 95, 99, and 96 for fixing circuit boards 81a and 81b, and a fixing frame 89 fixed to an upper side cover part 53b in the state of pressing a filter is formed separately from the upper side cover part 53b. Since it is not needed to form a pawl part or the like for attaching the circuit boards 81a and 81b to the upper side cover part 53b, the need of forming a press cut hole or the like at the upper side cover part 53b is eliminated, and air flow noise or the like due to exhaust leakage in the press cut hole is not generated. Since the circuit boards 81a and 81b can be fixed near a second cover exhaust port 82, the vibrations or the like of the circuit boards 81a and 81b by exhaust are suppressed even when the circuit boards 81a and 81b are arranged inside an exhaust air path chamber 36, and silence is improved. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a vacuum cleaner including an exhaust air passage chamber through which exhaust air from an electric blower passes.

  Conventionally, this type of vacuum cleaner has a main body dust collecting chamber in which a dust bag, a filter, a dust collecting device (dust collecting cup) and the like can be attached and detached, and an electric blower, for example, in a hollow main body case made of synthetic resin. And an electric blower chamber that houses the front and rear. The electric blower is arranged so that the suction side communicates with the main body dust collection chamber and the exhaust side communicates with the electric blower chamber. Further, an exhaust air passage chamber through which a part of the exhaust air from the electric blower flows is defined in the electric blower chamber. In the exhaust air passage chamber, a circuit board on which a control means for controlling the operation of the electric blower is mounted is arranged so that the circuit board is forcibly cooled by the exhaust from the electric blower. (For example, refer to Patent Document 1).

JP 2004-229911 A (Page 4, FIG. 1)

However, in the above-described electric vacuum cleaner, for example, as shown in FIG. 8, it is necessary to form the claw portion 2 and the like for fixing the circuit board 1 in the exhaust air passage chamber 3. When the claw part 2 is formed by a molding die on the wall part 6 that divides the blower chamber 4 and covers the electric blower 5, a pressing hole 7 for forming the claw part 2 to be an undercut is formed. Inevitable. In the vacuum cleaner, the electric blower 5 generates a wind of about 2 m ³ / min, and the wind speed is 20 to 50 m / second in the exhaust air passage chamber 3 because the exhaust air passage chamber 3 is relatively narrow. There is a problem in that there is a possibility that wind noise may be generated due to exhaust air leaking from the cut-off hole 7 due to the exhaust air of a certain level and blowing in the exhaust air passage chamber 3.

  This invention is made | formed in view of such a point, and it aims at providing the vacuum cleaner which improved the silence.

  The present invention includes a wall section defining an electric blower chamber in a main body case, an electric blower section accommodated in the electric blower chamber, an exhaust port formed in the wall section and exhausted from the electric blower section, and a wall An exhaust air passage chamber that is at least partially partitioned by the section and communicates between the exhaust port and the main body exhaust port, a circuit board disposed in the exhaust air passage chamber, a filter attached to cover the exhaust port, It is formed separately from the wall portion, and includes a substrate fixing portion that fixes the circuit board, and a fixing frame that is fixed to the wall portion while holding the filter.

  According to the present invention, since it is not necessary to form a claw portion for attaching the circuit board to the wall portion, it is not necessary to form a cut hole or the like in the wall portion, and a wind noise or the like caused by exhaust leakage at the cut hole is generated. In addition, since the circuit board can be fixed in the vicinity of the exhaust port, even if the circuit board is disposed in the exhaust air passage chamber, it is possible to suppress the vibration of the circuit board from being generated by the exhaust, and to improve the quietness.

It is a perspective view which shows the exhaust-port vicinity of the exhaust air channel chamber of the vacuum cleaner of one embodiment of this invention. It is a perspective view which expands and shows a part of exhaust air channel room same as the above. It is a perspective view which shows the fixed frame of a vacuum cleaner same as the above. It is explanatory drawing which shows the inside of a vacuum cleaner same as the above from back. It is a longitudinal cross-sectional view which shows the principal part of a vacuum cleaner same as the above. It is explanatory drawing which shows typically the internal structure of a vacuum cleaner same as the above. It is a perspective view of a vacuum cleaner same as the above. It is a perspective view which shows a part of exhaust air channel room of the vacuum cleaner of a prior art example.

  The configuration of an embodiment of the present invention will be described below with reference to FIGS.

  In FIG. 7, reference numeral 11 denotes a so-called canister-type vacuum cleaner, and the vacuum cleaner 11 has a pipe part 12 and a cleaner body 13 to which the pipe part 12 is detachably connected.

  The pipe part 12 is provided on the distal end side of the hose body 16, the connecting pipe part 15 connected to the cleaner body 13, the flexible hose body 16 communicating with the distal end side of the connecting pipe part 15. The hand operating section 17, the extension pipe 18 detachably connected to the distal end side of the hand operating section 17, and the floor brush 19 as a suction port body detachably connected to the distal end side of the extension pipe 18. It has.

  On the hand operating portion 17, a gripping portion 21 protrudes toward the hose body 16, and the gripping portion 21 is provided with a plurality of setting buttons 22 for operation.

  Further, as shown in FIGS. 4 to 6, the cleaner body 13 includes a hollow body case 25. A partition wall 26 is formed in the body case 25 in a substantially middle region in the front-rear direction. A front chamber 27 is defined on the front side of the partition wall 26, and a rear chamber 28 is defined on the rear side of the partition wall 26. A main body dust collecting chamber 31 is defined in the front chamber 27, and an electric blower chamber 33 that houses the electric blower unit 32 in the rear chamber 28, and a cord reel as a power feeding unit around which a power cord is wound. A power supply chamber 35 that houses 34 and an exhaust air passage chamber 36 as a sealed space are partitioned. That is, the main body case 25 has a multiple structure in which a main body dust collection chamber 31 is defined in the front chamber 27, and an electric blower chamber 33, a power supply chamber 35, and an exhaust air passage chamber 36 are defined in the rear chamber 28. Yes.

  The main body case 25 is formed of, for example, a synthetic resin, and has a lower case 41 that is open on the upper side, an upper case 42 that covers a rear chamber 28 that is an upper rear portion of the lower case 41, and the upper case 42 or the lower case 41. On the other hand, a lid 43 that is pivotally supported so as to be pivotable in the vertical direction and covers the front chamber 27 and that can open and close the main dust collection chamber 31 is provided. A main body suction port 44 as a suction port is formed in the front portion of the main body case 25 as an opening.

  The lower case 41 includes a bottom surface 41a facing the lower portion of the electric blower unit 32, a side surface 41b facing each of the side portions of the electric blower unit 32, and a rear surface 41c facing the rear portion of the electric blower unit 32. It is formed in an open box shape. Further, on each side surface 41b of the lower case 41, traveling wheels 46 that allow the cleaner body 13 to travel on the floor surface as a surface to be cleaned are rotatably supported.

  On the upper part of the upper case 42, a handle 48 for carrying the cleaner body 13 is formed on the left and right. Further, a plurality of main body exhaust ports 49 communicating with the exhaust air passage chamber 36 are formed in the rear part of the upper case 42 toward the rear upper side, and an exhaust port filter 50 is attached to the main body exhaust port 49. .

  The lid 43 is pivotally supported by the upper case 42 or the lower case 41 at the rear, and can be rotated in the vertical direction. The main body dust collecting chamber 31 is configured to be closed in a rotated state.

  The main body suction port 44 communicates the main body dust collection chamber 31 with the outside of the main body case 25. In addition, a connecting pipe portion 15 (FIG. 7) is detachably connected to the main body suction port 44.

  The main dust collection chamber 31 is a portion that collects dust sucked together with air through the pipe portion 12 (FIG. 7) by driving the electric blower portion 32. For example, a dust collection bag P such as a paper pack is attached to the inside. In addition, a dust collection chamber filter F is attached on the downstream side of the dust bag P and on the upstream side of the partition wall 26.

  The electric blower unit 32 includes an electric blower 51 and a first electric blower cover 52 that covers the electric blower 51, and the first electric blower cover 52 is covered with a second electric blower cover 53.

  The electric blower 51 rectifies a centrifugal fan (not shown) that is rotationally driven by the electric motor unit and air blown from the centrifugal fan with respect to the motor case 56 that houses an electric motor unit (not shown) that is a motor unit. The fan cover 58 that covers the current plate (not shown) that leads to the inside is a well-known unit that is integrally connected. A plurality of blower exhaust ports 56a are formed in the motor case 56. The outer periphery of the motor case 56 is elastically suspended and supported by the first electric blower cover 52 via the suspension means 61.

  Here, the suspension means 61 can have any configuration. For example, the suspension means 61 is fixed to the annular inner support portion 61a fixed around the motor case 56 and the first electric blower cover 52 side. An annular outer support portion 61b is coaxially formed, and a plurality of coil springs 61c as urging means are disposed between the support portions 61a and 61b. That is, the coil springs 61c are arranged radially with respect to the electric blower 51. The coil springs 61c are preferably arranged at substantially equal intervals in the circumferential direction. The suspension means 61 is arranged to suspend the position of the center of gravity of the electric blower 51 or a position near the center of gravity with respect to the first electric blower cover 52.

  The fan cover 58 is formed in a substantially covered cylindrical shape with a round hole-like intake port 66 opened at the center.

  In addition, the first electric blower cover 52 is formed in a substantially cylindrical shape with, for example, a synthetic resin. The first electric blower cover 52 has a round hole-shaped first cover suction opening 71 formed in the front end portion which is one end portion, and the rear portion of the electric blower 51 is accommodated in the rear end portion which is the other end portion. A substantially cylindrical head accommodating portion 72 that protrudes rearward is integrally formed. Further, a first cover exhaust port 73 is formed in the lower portion of the first electric blower cover 52 so as to face the blower exhaust port 56a of the electric blower 51. The first electric blower cover 52 includes, for example, a substantially cylindrical front cover portion 52a that is one first cover portion and a substantially cylindrical rear cover portion 52b that is the other first cover portion. It is divided into front and back. The first electric blower cover 52 has a first cover suction port 71 side, which is the front end side, via an upstream-side seal member 74 as a substantially annular first seal member that is a vibration-proof member as an elastic member. The main body case 25 side is connected to the intake side silencer 75, and the rear end side of the head housing portion 72 side is connected to the main body case 25 side via a downstream side seal member 76 which is a second seal member as an elastic member. It is supported by a certain second electric blower cover 53. Therefore, the lower part of the first electric blower cover 52 is spaced apart from the lower part of the second electric blower cover 53.

  The first cover exhaust port 73 is formed between the lower ends of the front cover part 52a and the rear cover part 52b, for example, and is located on the rear side of the first electric blower cover 52. Therefore, the electric blower unit 32 exhausts from the lower rear part into the electric blower chamber 33. A cover filter 77 is attached to the first cover exhaust port 73.

  The upstream seal member 74 is formed of an elastic member (flexible member) such as rubber or elastomer, for example. Further, the upstream side seal member 74 is hermetically connected to the rear end side, which is the exhaust side of the intake side silencer 75, at the front end side, and the intermediate position in the front-rear direction is the first cover suction of the first electric blower cover 52 The rear edge side is engaged with the inner edge of the port 71 and attached to the front surface of the fan cover 58 from the peripheral edge of the air inlet 66 of the fan cover 58 of the electric blower 51. For this reason, the intake-side silencer 75 is airtightly connected to the intake port 66 of the electric blower 51 via the upstream-side seal member 74.

  The intake-side silencer 75 is a so-called expansion silencer, and is sucked in by an operation sound generated when the electric blower 51 is driven (hereinafter simply referred to as a drive sound of the electric blower 51) or by the drive of the electric blower 51. It absorbs wind noise generated by air and prevents it from being transmitted to the floor brush 19 (FIG. 7). The intake-side silencer 75 includes a funnel-shaped inducer portion 75a as a silencer body whose front end portion is attached to the partition wall 26 and is gradually reduced in diameter toward the rear (downstream side), and the inducer portion. And a breathable sound absorbing material 75b attached to the inside of 75a.

  The inducer portion 75a is a portion that rectifies the air that has passed through the main body dust collection chamber 31 to the downstream side, on the rear side that is downstream of the communication port 78 that is opened in the partition wall 26 and communicates with the main body dust collection chamber 31. Airtight connection. For this reason, the intake port 66 of the electric blower 51 communicates with the main body dust collection chamber 31 and the main body suction port 44 via the intake side silencer 75 and the communication port 78.

  The sound absorbing material 75b is fixed inside the inducer portion 75a.

  On the other hand, the downstream seal member 76 is formed of an elastic member (flexible member) such as rubber or elastomer, and is attached so as to surround the periphery of the head accommodating portion 72.

  The second electric blower cover 53 is formed of, for example, a synthetic resin, and includes, for example, a lower cover portion 53a that is one second cover portion and an upper cover portion 53b that is the other second cover portion as a wall portion. Is divided up and down. The second electric blower cover 53 defines an electric blower chamber 33 in the rear chamber 28. That is, the second electric blower cover 53 has a wall portion that partitions the electric blower chamber 33 and the power supply chamber 35 on one side, and the electric blower chamber 33 and the power supply chamber 35 on the one side. A hole (not shown) that communicates with each other is formed, and a filter (not shown) is attached to the hole.

  The lower cover portion 53a is formed in a box shape that is long in the left-right width direction and is open on the upper side. For example, both sides are fixed to the lower case 41 by fixing members such as screws. Therefore, the lower portion of the lower cover portion 53a is separated from the bottom surface 41a of the lower case 41 in a floating state. Further, the lower surface of the lower cover portion 53 a faces the first cover exhaust port 73 of the first electric blower cover 52. The lower cover portion 53a has a front end portion that is airtightly fitted around the intake side silencer 75, and a rear end portion that is fixed inside the rear surface 41c of the lower case 41. In addition, a lower part of the downstream seal member 76 attached to the first electric blower cover 52 is placed on the upper part of the rear end of the lower cover part 53a.

  Further, the upper cover portion 53b is formed in a longitudinal shape in the left-right width direction, and for example, both sides are fixed to the lower cover portion 53a by fixing members so as to cover the entire first electric blower cover 52. The entire upper side of the lower cover portion 53a is covered. In addition, a circuit board 81 mounted with a control circuit or the like as a control unit for controlling the driving of the electric blower 51 is disposed on the upper cover portion 53b. Further, the front portion of the upper cover portion 53b is curved in an arc shape along the outer periphery of the electric blower portion 32 or the intake side silencer 75, and the curved front portion includes the electric blower chamber 33 and the exhaust wind. A plurality of quadrangular second cover exhaust ports 82 communicating with the passage chamber 36 are formed in the left-right width direction. Therefore, a cover rib portion 83 as a wall portion rib portion is formed between the second cover exhaust ports 82 and 82 along the front-rear direction. A case body 84 for partitioning the exhaust air passage chamber 36 between the upper cover portion 53b and the upper cover portion 53b is attached above the upper cover portion 53b. Further, the upper cover portion 53b is separated from the upper portion of the first electric blower cover 52. Furthermore, the rear end of the upper cover portion 53b is curved downward along the outer shape of the first electric blower cover 52, and the lower portion of the rear end is the downstream side attached to the first electric blower cover 52. The seal member 76 is pressed against the upper part. Therefore, the rear side of the first electric blower cover 52 is elastically sandwiched and fixed from above and below via the downstream seal member 76 by the rear end of the upper cover portion 53b and the rear end of the lower cover portion 53a.

  The circuit board 81 includes a main circuit board 81a mounted with a control circuit as a control means for controlling the operation of the electric blower 51 to the operation set by the setting button 22 (FIG. 7), and electrically connected to the main circuit board 81a. And a sub circuit board 81b on which an LED lamp or the like, which is a lighting means (not shown), is connected to notify an operator of the cleaning state.

  The main circuit board 81a is formed in a substantially quadrangular shape larger than the sub circuit board 81b, and is, for example, horizontal in the exhaust air passage chamber 36, that is, the front-rear direction that is the air passage direction in the exhaust air passage chamber 36. It is fixed in a state along the longitudinal direction. Furthermore, a heat radiating plate 86, which is a heat radiating member for heat radiating, formed of a member such as aluminum having excellent heat radiating properties, for example, is attached to the rear end portion of the main circuit board 81a.

  The heat radiating plate 86 protrudes downward (orthogonal) with respect to the main circuit board 81a and is inserted into a mounting hole 87 formed in a longitudinal shape along the left-right width direction in the upper cover portion 53b. ing. The mounting hole 87 is configured to be airtightly closed by inserting the heat radiating plate 86 and to prevent air leakage from the exhaust air passage chamber 36 to the electric blower chamber 33.

  The sub circuit board 81b is formed in a quadrangular shape, and is fixed in a state where the longitudinal direction is along the front-rear direction.

  Further, the second cover exhaust port 82 is located above the intake-side silencer 75 and opens along the vertical direction. That is, these second cover exhaust ports 82 are located in the upper front part of the electric blower unit 32. Further, a filter 88 is disposed above the second cover exhaust ports 82, that is, on the exhaust air passage chamber 36 side that is the exhaust side, and the filter 88 covers the entire second cover exhaust port 82.

  Here, the filter 88 has a function of collecting dust contained in the passing exhaust air and a function of an exhaust-side sound absorbing material that absorbs noise contained in the exhaust air. The material of the filter 88 is urethane foam, for example, and corresponds to a desired frequency to be absorbed, such as driving sound of the electric blower 51 and wind noise generated by the flow of air exhausted from the electric blower 51. Is set arbitrarily. The filter 88 is fixed to the second cover exhaust port 82 from above via a fixing frame 89 made of, for example, synthetic resin.

  As shown in FIGS. 1 and 3, the fixed frame 89 is formed in a plate shape that is long in the left-right width direction and curved along the curved shape of the front portion of the upper cover portion 53b. Therefore, between the both side portions of the fixed frame 89 and the both side portions of the case body 84, as shown in FIG. 4, the vicinity of the center portion in the left-right width direction of the fixed frame 89 and the center portion of the case body 84 in the left-right width direction. Compared with the vicinity, the exhaust air passage chamber 36 is formed wider up and down. As shown in FIGS. 1, 3, and 4, the fixed frame 89 is formed with a plurality of vent holes 92 in the left-right width direction. Therefore, a plurality of ribs 93 are formed between the vents 92 and 92. In addition, a first board fixing part as a board fixing part for fixing both sides of the main circuit board 81a of the circuit board 81 in the vicinity of the center in the left-right width direction of the fixing frame 89 and in the rear part of the vent 92. A certain main fixing part 95, 95 projects upward and is integrally formed. Further, a sub-fixing portion 96 as a substrate fixing portion for fixing the sub-circuit board 81b of the circuit board 81 is formed forward and integrally formed at the front portion near the center in the left-right width direction of the fixing frame 89. Yes. Further, between the main fixing portions 95 and 95 of the fixing frame 89, a rear fixing arm portion 97 as a fixing frame fixing protruding portion for fixing the fixing frame 89 to the upper cover portion 53b protrudes downward and is integrated. Is formed. Further, in the vicinity of both ends in the left-right width direction of the fixed frame 89, side fixed arm portions 98 as fixed frame fixed protruding portions for fixing the fixed frame 89 to the upper cover portion 53b are respectively protruded downward and integrated. Is formed. Further, an auxiliary fixing part 99 as a board fixing part for fixing one side of the main circuit board 81a of the circuit board 81 protrudes upward and is integrated with a rear part on one side of the fixing frame 89 in the left-right width direction. Is formed. Furthermore, a screw as a fixing frame fixing portion for fixing the fixing frame 89 to the upper cover portion 53b at the rear portion on one side of the fixing frame 89 in the left-right width direction and on the other side of the auxiliary fixing portion 99. A substantially cylindrical boss portion 100 for stopping is integrally formed.

  In addition, a power line that is a lead wire (not shown) that is electrically connected to the electric blower 51 (FIG. 5) and the tube part 12 (FIG. 7) side is held at the rear part on the other side of the fixed frame 89 in the left-right width direction. Lead wire holding portions 103, 103 are integrally formed so as to protrude rearward. Further, a plurality of lead wire guide portions 104 for guiding the power supply line are formed integrally with the rear portion of the other side of the fixed frame 89 in the left-right width direction so as to protrude upward. Further, on the lower side of the rear portion of the fixed frame 89, that is, on the upper cover portion 53b side, as shown in FIG. 2, a pressing portion for pressing the silencer 106 disposed along the upper surface of the upper cover portion 53b. 107 is integrally formed protruding downward in a rib shape. In addition, a positioning projection 108 for positioning the fixed frame 89 in the front-rear direction with respect to the upper cover portion 53b protrudes downward at the lower part of the fixed frame 89 and at the rear edge of the vent 92. It is integrally formed. The rear part of the fixed frame 89 is in contact with the front part of the positioning rib 109 as a positioning part formed in plural on the upper cover part 53b.

  The vent holes 92 shown in FIGS. 1 and 3 are formed in numbers and sizes corresponding to the second cover exhaust ports 82, and are located above the filter 88 (FIG. 5). The second cover exhaust port 82 communicates with each of the second cover 82. That is, each rib portion 93 is disposed at a position corresponding to each cover rib portion 83, and is a position that does not intersect the opening projection position on the upper side of the second cover exhaust port 82.

  Of the ribs 93, ribs 93a, 93a located near the center in the left-right width direction of the fixed frame 89 are provided with lead wires (not shown) that electrically connect the main circuit board 81a and the sub circuit board 81b. The fitting recesses 93b and 93b are respectively formed. Therefore, this lead wire is located on the back side of the ribs 93a, 93a with respect to the second cover exhaust port 82, and does not intersect the opening projection position on the upper side of the second cover exhaust port 82.

  The main fixing portions 95 and 95 are portions for holding both sides of the front portion of the main circuit board 81a, and upper end portions thereof are main claw portions 95a and 95a as claw portions protruding inward. For this reason, the fixing frame 89 which is the base end portion of the main fixing portions 95 and 95 is formed with pressing holes 95b and 95b for forming main claw portions 95a and 95a which are undercut at the time of molding. Further, on the base end side of the main fixing portions 95, 95, the main mounting as a mounting portion for mounting the lower side of the front portion of the main circuit board 81a along a part of the periphery of the cut holes 95b, 95b. The placement portions 95c and 95c are formed in a trapezoidal shape integrally with the fixed frame 89. The pressing holes 95b and 95b are respectively closed by the upper surface of the upper cover portion 53b in a state where the fixing frame 89 is attached to the upper cover portion 53b.

  The main claw portions 95a and 95a are engaged with the upper surfaces on both sides of the front portion of the main circuit board 81a placed on the main placement parts 95c and 95c to fix the main circuit board 81a.

  The sub-fixing portion 96 has a rectangular frame-shaped frame portion 96a, and on both sides of the frame portion 96a, sub-claw portions 96b as claw portions protrude upward and are integrally formed.

  The frame portion 96a is a portion that becomes a sub-mounting portion as a mounting portion for mounting the sub-circuit board 81b. The sub claw portion 96b is engaged with the upper surfaces on both sides of the sub circuit substrate 81b placed on the frame portion 96a to fix the sub circuit substrate 81b.

  The rear fixed arm portion 97 is inserted and engaged with a rear engagement hole portion 111 (FIG. 2) formed on the upper surface of the upper cover portion 53b, thereby fixing the fixing frame 89 to the upper cover portion 53b. And the tip side protrudes in a claw shape toward the rear.

  Similarly, each side fixing arm portion 98 is inserted and engaged with a side engaging hole portion 112 (only one shown) formed on the upper surface of the upper cover portion 53b, thereby fixing the fixing frame 89 to the upper cover. It fixes to the part 53b, and each front-end | tip side protrudes in the shape of a nail | claw toward outward.

  The engagement holes 111 and 112 are hermetically closed by inserting the fixed arm portions 97 and 98, respectively, and are configured so that no air leaks from the exhaust air passage chamber 36 to the electric blower chamber 33. ing.

  Further, the auxiliary fixing portion 99 is inserted from the lower side into a front position closer to one side of the main circuit board 81a to auxiliaryly fix the main circuit board 81a. It should be noted that the rear position of the main circuit board 81a near the other side, that is, the position diagonally opposite the auxiliary fixing portion 99 is that the locking fixing portion 114 protruding upward from the upper cover portion 53b is inserted from the lower side. It is fixed.

  In the boss part 100, a screw which is a fixing member (not shown) is inserted, and the inserted frame is fixed to the upper cover part 53b by screwing the inserted screw to the upper cover part 53b. .

  Each lead wire holding portion 103 protrudes linearly, for example, along the front-rear direction. In addition, a fitting recess 103a into which the power supply line is fitted is cut out in an arc shape at the lower portion of each lead wire holding portion 103. That is, each lead wire holding portion 103 is configured to hold the power supply line between the fitting recess 103a and the upper surface of the upper cover portion 53b.

  Each lead wire guide portion 104 is connected to the electric blower 51 (FIG. 5) and the main body suction port 44 (FIG. 7) side through a lead-out hole portion 116 formed on the other side portion of the upper cover portion 53b. The lead wire led into the exhaust air duct chamber 36 from the side shown in FIG. 7) is guided to the lead wire holding portion 103 side with the other side surface of the upper cover portion 53b.

  Further, the sound deadening material 106 is formed in a sheet shape by a member such as foamed urethane having air permeability, and covers, for example, a part or the whole of the upper surface of the upper cover portion 53b. The muffler 106 is appropriately formed with a hole or a notch so as to avoid various protrusions formed on the upper surface of the upper cover portion 53b.

  As shown in FIG. 2, the pressing portion 107 is formed in a longitudinal shape along the left-right width direction that is the longitudinal direction of the fixed frame 89. For example, the pressing portion 107 may have a continuous shape between both sides of the fixed frame 89, or a plurality of the pressing portions 107 may be intermittently formed between both sides of the fixed frame 89.

  The positioning protrusion 108 is positioned in front of the pressing portion 107 and protrudes downward from the pressing portion 107. The positioning protrusion 108 is stepped on the upper cover portion 53b at the rear edge of the second cover exhaust port 82. It is fitted to a stepped portion 118 formed in a notch.

  The positioning rib 109 is formed along the left-right width direction of the upper cover portion 53b.

  Therefore, the positioning protrusions 108 and the positioning ribs 109 restrict the front and rear positions of the fixed frame 89 with respect to the upper cover portion 53b.

  Further, as shown in FIGS. 5 and 6, the case body 84 is formed horizontally long in the left-right width direction using, for example, a synthetic resin, and is opposed to the entire upper portion of the upper cover portion 53b. On the other hand, it is fixed via an attachment member such as a screw (not shown). Therefore, the exhaust air passage chamber 36 is partitioned above the second electric blower cover 53. Further, the lower end of the case body 84 is in close contact with the upper portion of the upper cover portion 53b, and the upper portion thereof is in close contact with the inner side of the upper case 42 of the main body case 25 and extends horizontally in the front-rear direction. Further, a wall-shaped front wall portion 84a is integrally formed at the front end of the case body 84 along the vertical direction in front of the second cover exhaust port 82. The rear end of the case body 84 is in close contact with the upstream side of the main body exhaust port 49. Therefore, the exhaust air passage chamber 36 is sealed between the upper cover portion 53b (second electric blower cover 53) and the case body 84 from the second cover exhaust port 82 to the main body exhaust port 49 in the left-right width direction. It is formed as a space that extends and extends in the front-rear direction. In other words, the exhaust air passage chamber 36 is an expansion type that does not have any other holes or gaps (clearances) through which air leaks at the position between the second cover exhaust port 82 and the main body exhaust port 49. The sound deadening space, that is, the chamber. That is, the exhaust air passage chamber 36 is formed so that the air passage cross-sectional area is larger than the opening area of the second cover exhaust port 82.

  Next, the operation of the above embodiment will be described.

  When the vacuum cleaner body 13 of the vacuum cleaner 11 is assembled, first, the lower cover portion 53a of the second electric blower cover 53 is placed on the lower case 41 shown in FIG. The first electric blower cover 52 suspended inside by 61 is incorporated on the lower cover portion 53a together with the intake side silencer 75, and the intake side silencer 75 is connected to the communication port 78.

  Thereafter, the upper cover portion 53b is attached and fixed on the lower cover portion 53a so as to cover the upper side of the first electric blower cover 52, the filter 88 is attached on the second cover exhaust port 82, and the upper cover portion. The silencer 106 is placed on the upper surface of 53b, and the fixed frame 89 is attached to the upper cover portion 53b so as to cover the filter 88. At this time, the fixing arm portions 97 and 98 of the fixing frame 89 shown in FIG. 3 are inserted and engaged with the engaging hole portions 111 and 112 shown in FIG. The fixing frame 89 is fixed to the upper cover portion 53b by screwing to the upper cover portion 53b, and the pressing portion 107 of the fixing frame 89 presses the front end portion of the silencer 106 from the upper side to the upper surface of the upper cover portion 53b. .

  Further, the main circuit board 81a of the circuit board 81 is placed on the main placement part 95c of the fixing frame 89 and locked by the main claw part 95a, and the auxiliary fixing part 99 and the locking fixing part 114 are connected to the main circuit board. Insert into 81a from below and lock. Further, the sub circuit board 81b of the circuit board 81 is inserted into the space between the frame part 96a and the sub claw part 96b of the fixed frame 89 from behind to be locked. In this state, the front end side of the main circuit board 81a and the rear end side of the sub circuit board 81b are respectively disposed facing the second cover exhaust port 82 (vent hole 92).

  Then, the power supply line led out from the lead-out hole part 116 is inserted into the fitting recess 103a of the lead wire holding part 103 along the lead wire guide part 104 and connected to the main circuit board 81a. The sub circuit board 81b is connected by a lead wire along the recess 93b.

  Furthermore, after the case body 84 is fixed on the upper cover portion 53b so as to cover the circuit board 81, the upper case 42, the lid body 43 and the like are appropriately assembled to the lower case 41 to complete the cleaner body 13.

  Then, when cleaning, the gripper 21 shown in FIG. 7 is provided by the operator in a state where power can be supplied to the electric blower 51, such as by pulling out the power cord wound around the cord reel 34 and connecting it to an outlet. And the setting button 22 is operated, the circuit board 81 drives the electric blower 51. That is, the electric motor unit of the electric blower 51 rotates the centrifugal fan to generate a negative pressure. This negative pressure acts on the main body dust collecting chamber 31, the main body suction port 44, and the pipe portion 12 via the intake side silencer 75, and sucks dust together with air from the front end side of the floor brush 19. The vibration accompanying the rotation of the centrifugal fan of the electric blower 51 is absorbed by the expansion and contraction of the coil spring 61c, and the transmission to the first electric blower cover 52 is suppressed. The sound is silenced by the silencer 75.

  The operator places the floor brush 19 shown in FIG. 7 on the floor surface, grips the grip portion 21, and moves the floor brush 19 back and forth, thereby sucking dust on the floor surface from the floor brush 19. clean.

  The sucked air is sucked into the main body dust collection chamber 31 through the extension pipe 18, hose body 16 and connecting pipe section 15 together with dust, and dust is collected in the dust collection bag P of the main body dust collection chamber 31. It is collected. Then, after the dust is collected, the suction air passes through the dust collection chamber filter F, and is then sucked into the intake-side silencer 75 from the communication port 78, along the inducer portion 75a of the intake-side silencer 75. Rectified. Further, the suction air is expanded in the inducer portion 75a to absorb wind noise, and is absorbed by passing through the sound absorbing material 75b.

  Thereafter, the suction air is sucked from the suction side silencer 75 into the suction port 66 of the electric blower 51 via the first cover suction port 71 via the upstream side seal member 74, and the central portion of the centrifugal fan. The air is sucked from the outside and blown out to the outer peripheral side, and is sucked into the motor case 56 while being rectified by the rectifying plate to become exhaust air. When passing through the motor case 56, the motor part is cooled, and the blower exhaust port 56a Is blown out.

  Then, the exhaust air is rectified in the first electric blower cover 52 and then exhausted from the first cover exhaust port 73 into the lower electric blower chamber 33 while passing through the cover filter 77 to be second electric blower. The cover 53 is sprayed onto the bottom surface of the lower cover portion 53a, and the front side of the first electric blower cover 52 passes from the lower cover portion 53a through the periphery of the intake side silencer 75 from the second cover exhaust port 82. The air is exhausted into the upper exhaust air passage chamber 36.

  At this time, the wind noise generated by the exhaust wind and the drive sound of the electric blower 51 included in the exhaust wind are exhausted from the first cover exhaust port 73 into the second electric blower cover 53, respectively. A filter 88 that passes through a long air passage length and is expanded in the exhaust air passage chamber 36, such as being exhausted from the second cover exhaust port 82 to the exhaust air passage chamber 36, and disposed in the second cover exhaust port 82. The sound is absorbed by passing through each.

  Thereafter, the exhaust air is bent backward from the vent 92 while being rectified by the filter 88 and passes through the exhaust air passage chamber 36 while cooling the main circuit board 81a and the sub circuit board 81b. A part of the sound is silenced by passing through the silencer 106, and further exhausted from the main body exhaust port 49 to the outside of the main body case 25 while passing through the exhaust port filter 50.

  When the cleaning is completed, the operator appropriately operates the setting button 22 to stop the driving of the electric blower 51.

  As described above, according to the above-described embodiment, the upper cover is provided with the fixing portions 95, 99 for fixing the main circuit board 81a and the sub-fixing portions 96 for fixing the sub circuit board 81b. By forming the fixing frame 89 for fixing to the portion 53b separately from the upper cover portion 53b, it is not necessary to form a claw portion for attaching the circuit boards 81a and 81b to the upper cover portion 53b. For this reason, it is not necessary to form a cut hole or the like in the upper cover portion 53b for forming a claw portion that becomes an undercut at the time of molding, and wind noise or the like caused by exhaust leakage at the cut hole may occur. Absent. Further, since the circuit boards 81a and 81b can be fixed in the vicinity of the second cover exhaust port 82, even if the circuit boards 81a and 81b are arranged in the exhaust air passage chamber 36, vibrations of the circuit boards 81a and 81b are generated by the exhaust. Can be suppressed, and quietness can be improved.

  Further, by fixing the circuit boards 81a and 81b to the fixing frame 89, a part of the circuit boards 81a and 81b faces the second cover exhaust port 82 and the vent hole 92, so that the circuit boards 81a and 81b are caused by the exhaust air. Can be cooled efficiently.

  Further, the silencer 106 is disposed in the exhaust air passage chamber 36 along the upper cover portion 53b, and the fixing frame 89 is fixed to the upper cover portion 53b. By holding the upstream portion of the sound deadening material 106 in the air passage chamber 36, it is possible to prevent the sound deadening material 106 from flapping or rising due to the exhaust air, and to fix the filter 88. By using for suppressing the sound deadening material 106, it is not necessary to arrange a separate member for holding the sound deadening material 106, and the configuration can be simplified.

  Further, the exhaust air not only is silenced by the silencer 106 by passing through the silencer 106, but the unevenness on the upper surface of the upper cover portion 53b can be leveled by the silencer 106, so that the inside of the exhaust air passage chamber 36 is Since it becomes a smooth air path and it becomes difficult to generate the wind noise caused by the exhaust air, the silence can be further improved.

  Further, the second cover exhaust port 82 is disposed at the front upper portion of the electric blower portion 33 that exhausts from the first cover exhaust port 73 of the first electric blower cover 52 formed in the lower rear portion, that is, at a position far from the first cover exhaust port 73. By doing so, the filter 88 can be disposed in a portion where the exhaust air is bent when passing from the electric blower chamber 33 to the exhaust air passage chamber 36, so that the exhaust air passing through the filter 88 is only rectified by the filter 88. In addition, by disposing the main body exhaust port 49 at the rear side of the main body case 25, that is, at a position far from the second cover exhaust port 81, the exhaust air passage through which the exhaust air from the electric blower 51 passes is repeated in the front-rear direction. Since it is folded and lengthened, the quietness can be further improved.

  Further, by arranging the lead wire connecting the main circuit board 81a and the sub circuit board 81b along the recess 93b formed in the rib portion 93a, the exhaust air passing through the second cover exhaust port 82 and the filter 88 is vented. When the lead wire passes through the opening 92, the lead wire is not blown, and the lead wire can prevent wind noise and fluttering of the lead wire, and can also prevent deterioration of the lead wire due to heat of the exhaust air.

  Then, by forming the fixed frame 89 in an arc shape curved in the left-right width direction, the height of the exhaust air blown out to the exhaust air passage chamber 36 through the vent 92 is set in the left-right width direction of the fixed frame 89. The noise can be reduced by making the difference between the vicinity of the center and both sides, and the area of the exhaust air passage chamber 36 can be sufficiently secured from both sides of the fixed frame 89 to the rear, improving the exhaust performance (suction performance). Can be made.

  In addition, since the filter 88 functions as an exhaust side sound absorbing material, when the exhaust air passes through the filter 88, the driving sound or wind noise of the electric blower 51 can be absorbed, and the silence can be further improved.

  Further, by making the exhaust air passage chamber 36 into an expansion type silencing space, the driving sound of the electric blower 51 included in the exhaust air flowing from the electric blower chamber 33 to the exhaust air passage chamber 36, or the wind noise, Since the sound is absorbed by the exhaust air being expanded in the exhaust air passage chamber 36, the silence can be further improved.

  In the above embodiment, the second electric blower cover 53 may cover a part of the first electric blower cover 52.

  Further, the main circuit board 81a and the like may be wrapped with a protective sheet or the like.

  Furthermore, as the vacuum cleaner 11, not only the power supplied by the power cord but also the power supplied from a power supply unit such as a secondary battery may be used.

  The details of the vacuum cleaner 11 are not limited to the above configuration, for example, the upright type in which the floor brush 19 is connected to the lower part of the vertically long vacuum cleaner body 13 as well as the canister type vacuum cleaner 11. Any vacuum cleaner such as a vacuum cleaner or a hand-held vacuum cleaner can be used.

11 Vacuum cleaner
25 Main unit case
32 Electric blower
33 Electric blower room
36 Exhaust air channel room
49 Main unit exhaust port
53b Upper cover as wall
81 circuit board
82 2nd cover exhaust port as exhaust port
88 Filter
89 Fixed frame
95 Main fixing part as board fixing part
96 Sub-fixing part as board fixing part
99 Auxiliary fixing part as board fixing part
106 Silencer
107 Holding part

Claims (3)

A body case with a body exhaust,
A wall that partitions the electric blower chamber in the main body case;
An electric blower unit housed in the electric blower chamber;
An exhaust port formed in the wall portion and exhausted from the electric blower unit;
An exhaust air passage chamber that is at least partially partitioned by the wall and communicates between the exhaust port and the main body exhaust port;
A circuit board disposed in the exhaust air duct chamber;
A filter attached over the exhaust port;
An electric vacuum cleaner comprising: a fixing frame that is formed separately from the wall portion and includes a substrate fixing portion that fixes the circuit board, and is fixed to the wall portion while pressing the filter. It has a silencer arranged in the exhaust air duct along the wall,
The vacuum cleaner according to claim 1, wherein the fixed frame includes a pressing portion that presses an end portion of the muffler by being fixed to the wall portion. The electric blower part exhausts from the lower rear,
The vacuum cleaner according to claim 1 or 2, wherein the exhaust port is formed in an upper front portion of the electric blower unit.

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