JPH06335436A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To cool parts having heat efficiently, utilizing wind from the electric blower, and to seal the gap between the electric blower room and the electric parts room easily and airtightly. CONSTITUTION:An electric blower 32 is held in an electric blower room 28 compartmentalized within the cleaner main body 11. Above the electric blower room 28, an electric parts room 61 is compartmentalized with a wall 28a inbetween. A transistor 66 is held in the electric parts room 61. A radiator board 67 bending into an approximate L shape at its vertical section is fitted in the transistor 66. A cooling board part 72 of the radiator board 67 is formed so that it protrudes into the electric blower room 28 through the penetrating hole 83 formed on the wall 28a. The penetrating hole 83 is sealed by a sealing material 76 fitted in the cooling board part 72. The fitting hole 78 of the sealing material 76 is pressed from the surrounding three sides by an attachment board 71 of the radiator board 67 and the pressing boards 74 extending from the respective ends of said attachment board 71. As the result, the sealing material 76 is pressed uniformly, preventing any distortion or turning up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric vacuum cleaner for cooling parts by means of a heat dissipation plate.

[0002]

2. Description of the Related Art Conventionally, a dust collecting chamber and an electric blower chamber are formed in the interior of a vacuum cleaner, and an electric blower housed in the electric blower chamber sucks in dust together with air and collects the dust in the dust collecting chamber. An electric vacuum cleaner is used to capture the dust in a provided dust bag.

Further, for example, adjacent to the electric blower room,
2. Description of the Related Art A configuration in which an electric component chamber is partitioned and formed is known. A circuit board is housed in the electric component chamber, and electric components such as transistors for driving an electric blower are mounted on the circuit board.

A heat sink is connected to the transistor to cool the transistor, for example. This heat dissipation plate is projected on the intake side of the electric blower through an insertion hole formed in the wall that divides the electric blower chamber and the electric component chamber, and is efficiently cooled by using the intake air of the electric blower. It has become so. Further, a seal member made of an elastic body is fitted into the insertion hole of the wall portion, and the insertion hole is airtightly held so that air is not sucked from the insertion hole.

[0005]

However, as in the prior art described above, an insertion hole is formed in the wall portion that divides the electric blower chamber and the electric component chamber, and the heat dissipation plate is inserted into the insertion hole and the seal member is provided. In the fitting configuration, there is a problem that the work of fitting the sealing member without twisting or turning over is complicated.

Further, in order to keep the insertion hole airtight, it is effective to uniformly press the seal member.
There is a problem in that the structure of the pressing body that uniformly presses the sealing member made of an elastic body is likely to be complicated and the manufacturing efficiency is deteriorated.

The present invention has been made in view of the above circumstances, and provides an electric vacuum cleaner capable of efficiently cooling heat-generating components and reliably sealing an insertion hole through which a heat sink is inserted with good workability. With the goal.

[0008]

The electric vacuum cleaner of the present invention comprises:
An electric blower chamber is provided inside the cleaner body, the electric blower is housed inside the electric blower chamber, and an electric vacuum cleaner in which parts that generate heat by being partitioned from the intake side of the electric blower by the wall portion are arranged, An insertion hole formed in the wall portion, a heat dissipation plate connected to the component and protruding through the insertion hole toward the intake side of the electric blower chamber, and a seal member fitted around the insertion hole. And at least a pressing means for pressing the heat dissipation plate toward the wall portion, wherein the seal member has a base plate portion having a fitting hole communicating with the insertion hole, and one side portion of the fitting hole. A ridge portion projecting from the substrate portion along the radiating plate, wherein the heat dissipation plate is connected to the component and abuts against the other side of the seal member; Bend the side edge and insert the insertion hole of the wall And a cooling plate portion projecting inside the electric blower chamber, and the sealing plate which is located at both ends of the cooling plate portion and extends flush with the mounting plate portion toward one side from the mounting plate portion. And a pressing plate portion that abuts near both ends of the insertion hole of the member.

[0009]

In the electric vacuum cleaner of the present invention, the heat of the heat-generating component is conducted to the cooling plate through the mounting plate of the radiator plate. Since the cooling plate portion projects inside the electric blower chamber, it is efficiently cooled by the wind generated by the electric blower. Further, in a state where the cooling plate portion of the heat radiating plate is fitted in the fitting hole of the seal member, the ridge portion of the seal member projects between the pressing plate portions of the heat radiating plate, and the mounting state of the seal member is confirmed. Then, the cooling plate portion of the heat dissipation plate is fitted in the fitting hole of the seal member, and the cooling plate portion is inserted into the insertion hole of the wall portion, and in three states around the fitting hole of the base member of the seal member. The mounting plate portion and the pressing plate portion of the heat radiating plate abut. Further, by pressing the heat dissipation plate toward the wall portion by the pressing means, the seal member is uniformly pressed against the heat dissipation plate.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of an embodiment of the vacuum cleaner of the present invention will be described below with reference to the drawings.

In FIG. 1, reference numeral 11 denotes a cleaner body, and the cleaner body 11 has a body case 12 whose upper side is opened, and an upper case 14 is attached to the upper side of the body case 12. A lid 15 is attached to the upper front side of the upper case 14 so as to openably and closably cover the opening of the main body case 12 from above. Further, the upper side of the upper case 14 is continuously covered with a case cover 16, an accessory cover 17, and an exhaust port cover 18 from the rear end of the lid 15 to the upper rear end of the main body case 12. As a whole, a cleaner body 11 having a substantially egg shell shape whose longitudinal direction is the front-rear direction is formed. Further, a handle 19 having a substantially U-shape that is vertically slidable is attached to the cleaner body 11 at a substantially central portion in the front-rear direction.

Further, the case cover 16 is provided with a recess 16a for facilitating gripping of the handle 19. And
The accessory cover 17 is attached so as to be openable and closable, and the accessory storage portion 17a formed below the accessory cover 17 is provided.
An accessory such as a hook (not shown) is stored in the.
Further, the exhaust port cover 18 has a rear end surface 18a formed in a substantially vertical plate shape, and a peripheral surface portion 18b formed in a stepwise manner from the front side to the rear side so that the diameter dimension is reduced. Two exhaust ports 18c and 18d, which are curved in a substantially semicircular shape along the outer peripheral surface of the cleaner body 11, are formed in the surface portion 18b in a substantially concentric manner by shifting the positions in the front-rear direction.

A swing wheel 21 is rotatably mounted on the front side of the lower portion of the main body case 12 in a variable direction, and a pair of driven wheels 22 is rotatably mounted on both sides of the rear part. Further, a pair of auxiliary wheels 23 on both sides are rotatably attached to the corners at the rear end of the main body case 12. Also, on the front peripheral surface of the main body case 12,
A band-shaped bumper 24 made of an elastic body is attached.

The inside of the main body case 12 has a lattice hole 25a.
It is divided into front and rear by a partition wall 25 having
A dust collection chamber 27 for housing the dust collection bag 26 is formed on the front side of the, and an electric blower chamber 28 is formed on the rear side of the partition wall 25. A removable auxiliary filter 29 that covers the lattice holes 25a is attached to the front side of the partition wall 25.

A holder 31 is provided in the dust collecting chamber 27 so as to face the opening of the body case 12, and the mouth frame 26a of the dust bag 26 is detachably held by the holder 31.

On the other hand, the electric blower chamber 28 houses an electric blower 32 whose front side is an intake side and whose rear side is an exhaust side. Further, the electric blower 32 includes rubber holding members (support rubbers) 36, 37 by vertical support walls 33, 34, 35 projecting from the body case 12 and the upper case 14 so as to face each other. It is supported in a state of being sandwiched through.

In the electric blower chamber 28, the intake side and the exhaust side of the electric blower 32 are airtightly partitioned by the holding member 36 on the front side having an annular shape, and the intake side of the electric blower 32 is provided with the grid holes 25a. The exhaust side of the electric blower 32 is communicated with the inside of the exhaust port cover 18 while communicating with the dust collection chamber 27.

The lid 15 is rotatably supported with its rear end as a fulcrum, and the lid 15 is turned upward to
The opening is opened so that the dust collecting bag 26 can be replaced. An opening 51 is opened in the lid 15 toward the upper front side, and a tubular connector 54 is rotatably attached to the inside of the inlet 51. In addition, a suction port 55 that connects the outside of the cleaner body 11 and the dust collection chamber 27 is formed.

Then, a hose (not shown) having an operating portion at its tip is rotatably connected to the suction port 55,
Furthermore, at the tip of this hose, via an extension pipe,
The suction port is designed to be connected. Also, the outlet
Between the 51 and the suction port 55, a plate-like shutter 56 that closes the insertion port 51 without connecting the hose is provided so as to be openable and closable.

Further, the lid 15 is provided with a display plate 58 having a plurality of light emitting diodes for indicating the operating state of the electric blower 32, for example.

Further, as shown in FIGS. 1 and 2, a substantially horizontal wall portion 28a which partitions the upper side of the electric blower chamber 28 is formed integrally with the upper case 14, and the upper case 14 has an upper side. Has an electric component chamber 61 defined therein. And
The electric component room 61 includes a wall 28 on the upper side of the electric blower room 28.
A circuit board 63 that is parallel to a is attached. Further, a transformer 64, a transistor 66 as a heat generating component for driving the electric blower 32, and the like are mounted on the circuit board 63.

A heat radiating plate 67 formed by bending an aluminum plate of a predetermined shape is fixed to the transistor 66. The heat dissipation plate 67 has a mounting plate portion 71 that is parallel to the circuit board 63, and a substantially rectangular plate shape that is formed by bending the mounting plate portion 71 from the front side edge 71 a along the longitudinal direction of the mounting plate portion 71 downwardly and substantially vertically. And a cooling plate portion 72 forming a. A component mounting portion 73 extends rearward from the vicinity of one end of the heat dissipation plate 67 in the longitudinal direction, and in order to fix the transistor 66 to this component mounting portion 73, a through hole and a positioning hole (not shown) are positioned. And a pair of projections for use with the. Then, a protrusion that engages with the circuit board 63 is formed on the lower surface of the mounting plate portion 71 near one end in the longitudinal direction.

Further, from both ends of the mounting plate portion 71 of the heat radiating plate 67, a pair of pressing plate portions 74 are located integrally on both sides of the cooling plate portion 72 and extend toward the front side. . Then, the upper surface portion and the lower surface portion of these pressing plate portions 74 are formed flat so as to be flush with the upper surface portion 71b and the lower surface portion 71c of the mounting plate portion 71.

The front edge of each pressing plate 74 and mounting plate 71
Notches 75 for facilitating the bending of the cooling plate portion 72 are formed between the respective portions 71a and 71a.

A seal member 76 is fitted on the cooling plate portion 72 of the heat dissipation plate 67.

The seal member 76 is made of elastically deformable rubber or the like and has a substantially rectangular plate-like substrate portion 77.

Further, the board portion 77 is formed with an elongated hole-like fitting hole 78 into which the cooling plate portion 72 of the heat dissipation plate 67 is fitted, and along the front side portion of the fitting hole 78. A ridge portion 79 is provided so as to project upward from the open position. In addition, the projecting dimension of the protruding portion 79 from the substrate portion 77 is the mounting plate portion of the heat dissipation plate 67.
It is set slightly larger than the plate thickness dimension of 71.

Further, on the lower surface side of the substrate portion 77, a cylindrical fitting portion 80 is provided so as to project downward from a position surrounding the fitting hole 78.

With the seal member 76 fitted to the heat dissipation plate 67, the ridges 79 of the seal member 76 are located slightly above the mounting plate parts 71 of the heat dissipation plate 67 between the pressing plate parts 74 on both sides. The upper surface of the other side portion of the base plate portion 77 of the seal member 76 abuts on the lower surface portion 71c of the mounting plate portion 71, and both ends of the base plate portion 77 of the seal member 76 of the pressing plate portion 74 of the heat dissipation plate 67 are projected. It adheres to the bottom surface.

The wall portion 28a of the electric blower chamber 28 is located in front of the support wall 33 for supporting the electric blower 32, communicates with the intake side of the electric blower 32, and has a cooling plate portion 72 of the heat radiating plate 67. An elongated substantially rectangular insertion hole 83 is formed so that the insertion hole 83 can be inserted therethrough. Further, two frame-shaped ribs 84, 85 are provided on the upper surface of the wall portion 28a so as to surround the insertion hole 83, and the fitting portion 80 of the seal member 76 is provided between the ribs 84, 85. An annular recess 86 that fits is formed.

Further, a front wall portion 87 which is located on the front side of the insertion hole 83 and extends vertically is formed in the wall portion 28a.

The heat dissipation plate 67 fitted with the seal member 76
With the cooling plate portion 72 of the above is press-fitted into the insertion hole 83 of the wall portion 28a, three sides of the fitting hole 78 of the seal member 76 are attached to the upper surface of the wall portion 28a, the mounting plate portion 71 of the heat dissipation plate 67, and It is adapted to be held between the pressing plate portion 74.

Further, 91 is a pressing body as a pressing means, and the pressing body 91 is integrally molded of, for example, synthetic resin, and is fixed between the upper side of the upper case 14 and the lower side of the case cover 16. There is. The pressing body 91 is formed with a rectangular tubular pressing cylinder portion 92, and the lower end portion of the pressing cylinder portion 92 is a rectangular frame-shaped pressing portion 92a. Further, from the upper end portion of the pressing cylinder portion 92, the fixing piece portion 93 extends toward the upper front side, and the component fixing portion 94 extends toward the rear side.

While the pressing body 91 is fixed at a predetermined position, the component fixing portion 94 of the pressing body 91 abuts on the upper portion of the transformer 64 on the circuit board 63, and the pressing cylinder portion of the pressing body 91.
The pressing portion 92a of 92 abuts on the mounting plate portion 71 of the heat dissipation plate 67 and the upper surface portion 71b of the pressing plate portion 74 and the upper side of the protrusion 79 of the seal member 76, and these transformer 64, heat dissipation plate 67, The seal member 76 is pressed downward. Further, in this state, the pressing portion 92a causes the ridge 79 of the seal member 76 to
The portion projecting above the mounting plate portion 71 is crushed so that the upper surface of the protruding portion 79 of the seal member 76 and the upper surface portion 71b of the mounting plate portion 71 of the heat dissipation plate 67 are substantially flush with each other. .

A heat radiating plate 67 protruding into the electric blower chamber 28
On the front side of the cooling plate portion 72, the front wall portion 87 faces the cooling plate portion 72 with a slight distance therebetween, and the heat dissipation plate 67 is protected.

According to the electric vacuum cleaner of this embodiment,
The heat of the transistor 66 is conducted to the cooling plate portion 72 via the mounting plate portion 71 of the heat dissipation plate 67. Since the cooling plate portion 71 projects to the intake side of the electric blower 32 inside the electric blower chamber 28, it is efficiently cooled by the intake air generated by the electric blower 32. Therefore, the heat generating components such as the transistor 66 can be efficiently cooled by using the wind generated by the electric blower 32.

Further, the heat dissipation plate 67 is provided in the fitting hole 78 of the seal member 76.
When fitting the cooling plate portion 72 of the
The cooling plate 72 of the heat dissipation plate 67 fitted with the
When press-fitting into the, the ridges 79 of the seal member 76 project between the pressing plate portions 74 of the heat dissipation plate 67, and it is possible to visually check whether the seal member 76 is mounted in the correct position, or whether it is twisted or turned up. It can be easily confirmed.

The heat dissipation plate 67 fitted with the seal member 76
When press-fitting the cooling plate part 72 of the cooling plate part 72 into the insertion hole 83 of the wall part 28a, the seal member 76 is pressed by the mounting plate part 71 and the pressing plate part 74 of the heat dissipation plate 67 in a substantially U shape. By pushing the upper surface portion 71b of the mounting plate portion 71 of the heat dissipation plate 67, the seal member 76 can be smoothly mounted without being twisted or curled up in the seal member 76.

Thus, the heat dissipation plate 67 and the seal member 76 are
In addition to the simple assembling work, the heat dissipation plate 71 can be easily formed by only bending a metal plate having a predetermined shape at one place, so that the manufacturing efficiency can be improved and the manufacturing cost can be reduced.

Further, since the base plate portion 77 of the seal member 76 is pressed against the pressing body 91 via the mounting plate portion 71 and the pressing plate portion 74 of the heat dissipation plate 67, the fitting holes 78 are evenly distributed on three sides. Pressed. Therefore, with the pressing body 91 fixed at a predetermined position, the seal member 76 can be pressed evenly to reliably seal the periphery of the heat dissipation plate 67, and the electric blower room 28 and the electric component room
61 and 61 can be kept airtight.

The substrate portion 77 of the seal member 76 is a heat sink.
Since it is pressed against the pressing body 91 via 67, the pressing body 91 can have a simple shape, and even if the thickness of the pressing cylinder portion 92 of the pressing body 91 is reduced, the pressing cylinder portion 92 is sealed by the sealing member 76. The seal member 76 can be pressed uniformly without digging into it.

In the above embodiment, the heat dissipation plate 67 and the seal member 76 are pressed by the pressing cylinder portion 92 of the pressing body 91. However, for example, a screw is used as the pressing means, and the heat dissipation plate 67 is walled by this screw. It can be screwed to the portion 28a and pressed downward.

[0043]

According to the electric vacuum cleaner of the present invention, it is possible to efficiently cool the heat-generating components by using the wind generated by the electric blower. Further, the work of assembling the heat dissipation plate and the seal member is simple, and the heat dissipation plate can be easily formed by bending a plate material having a predetermined shape, so that the manufacturing efficiency can be improved. Further, the sealing member can be pressed uniformly to improve the airtightness of the insertion hole formed in the wall portion.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of an electric vacuum cleaner of the present invention.

FIG. 2 is an exploded perspective view of the same.

[Explanation of symbols]

 11 Vacuum cleaner body 28 Electric blower room 28a Wall 32 Electric blower 66 Transistor as a component 67 Heat sink 71 Mounting plate 72 Cooling plate 74 Pressing plate 76 Sealing member 77 Board 78 Fitting hole 79 Projection 83 Insert Hole 91 Pressing body as pressing means

Claims (1)

[Claims] 1. An electric blower chamber is provided inside a vacuum cleaner body, the electric blower is housed inside the electric blower chamber, and a part for generating heat is arranged by being separated from an intake side of the electric blower by a wall portion. In the electric vacuum cleaner, an insertion hole formed in the wall portion, a heat dissipation plate connected to the component and protruding through the insertion hole toward the intake side of the electric blower chamber, and fitted around the insertion hole. A sealing member and a pressing unit that presses at least the heat dissipation plate toward the wall portion, the sealing member includes a base plate portion having a fitting hole communicating with the insertion hole, and the fitting hole. A ridge portion protruding from the substrate portion along one side portion, the heat dissipation plate is a mounting plate portion to which the component is connected and abuts on the other side portion of the seal member, The wall formed by bending one side edge of the mounting plate A cooling plate part that is inserted through the insertion hole of the part and projects into the electric blower chamber, and is located at both ends of the cooling plate part and is flush with the mounting plate part from the mounting plate part toward one side. An electric vacuum cleaner, comprising: a pressing plate portion that extends and abuts near both ends of the insertion hole of the seal member.