JPH0824182A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To eliminate complication of wiring between a cord reel and a control board so as to enhance the workability for assembling. CONSTITUTION:A reel body 52 on which a power source cord 50 is wound, is supported in a cantilever-like manner on one surface side of a reel base 51, being integrally incorporated with the latter, so as to constitute a cord reel 5. After completion of wiring between a control board 6 for controlling the operation including a start and a stop of a motor fan, and slip rings formed in opposed parts of the reel body 52 and the reel base 51, the control board 6 is integrally incorporated with the other surface of the reel base 51 serving as a support member for the cord reel 5.

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 having a structure in which the inside of a dust collecting chamber connected to a suction tool is evacuated by an electric blower to suck the dust into the dust collecting chamber. The present invention relates to an electric vacuum cleaner including a cord reel that winds and holds a power cord for supplying power to an electric blower.

[0002]

2. Description of the Related Art An electric vacuum cleaner includes a dust collecting chamber to which a suction tool is connected via a bellows hose and an extension tube, and an electric blower whose suction side faces the dust collecting chamber. Are arranged side by side inside, and are configured to suck dust into the inside of the dust collection chamber that is evacuated by the operation of the electric blower through the suction tool that is pressed against the cleaning surface by the operation of the user. .

[0003] Such an electric vacuum cleaner is generally equipped with a power cord connectable to a commercial power source for supplying electric power to the electric blower, and most of the electric vacuum cleaners for household use. , A cord reel for winding and holding the power cord is provided inside the main body case, and when working, a desired range of motion is secured by pulling out an appropriate length power cord from the cord reel, while when not working, the power cord The entire length is wound around the cord reel so that the electric vacuum cleaner can be stored in a limited place in the home.

The cord reel is disclosed in Japanese Patent Application Laid-Open No. 4-218131 and Japanese Patent Publication No. 5-30689.
A reel body that winds a power cord is rotatably attached to one surface of a plate-shaped reel base, and the reel base is fixed to a body case, and one side of the electric blower (rear position or lateral position) The power cord is wound up by the spring force of the spring (spring spring) built in the reel body, and when the power cord is pulled out, the return rotation of the reel body by the spring force is caused by the stopper. It is configured to be restrained and maintain the drawer length.

[0005]

In the electric vacuum cleaner having the cord reel as described above, the slip ring is formed at the portion where the reel base and the reel body face each other, and the power source rotates together with the reel body. The power supply from the cord to the electric blower is performed via this slip ring.

On the other hand, in the electric blower, at least start / stop control is performed according to a switch operation by an operator, and further, a change in load due to the degree of clogging of dust in the dust collection chamber and an internal temperature of the main body case. In some cases, output control is performed in accordance with operating conditions such as the above, and wiring from the lead-out end of the slip ring to the control board for these control operations is required. However, the control board is fixed at an appropriate position inside the main body case, and in the assembly of the conventional vacuum cleaner, the wiring process from the cord reel to the control board is troublesome, and the work efficiency is reduced. Has become.

The present invention has been made in view of the above circumstances, and provides an electric vacuum cleaner in which the troublesomeness of wiring between the cord reel and the control board is eliminated and the assembling workability is improved. With the goal.

[0008]

In an electric vacuum cleaner according to the present invention, a power cord for supplying electric power to an electric blower that evacuates a dust collection chamber is wound and held on a cord reel supported by a reel base. In the electric vacuum cleaner, a control circuit for controlling operation including starting and stopping of the electric blower is configured, and a control board integrally attached to the reel base is provided. .

[0009]

In the present invention, the control board, which has completed the predetermined wiring with the cord reel, is attached to the reel base that serves as a support base for the cord reel, and the cord reel and the control board are integrated into a main body case. Lock in place.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings showing the embodiments. FIG. 1 is a plan view showing an internal structure of an electric vacuum cleaner according to the present invention, and FIG. 2 is a side view showing a part of the vacuum cleaner.

The vacuum cleaner according to the present invention is, as shown in the drawing,
Body case 1 consisting of lower case 1a and upper case 1b
Is a large-diameter main wheel mounted on the left and right sides of the lower case 1a.
It is configured to be supported by 10, 10 and a caster wheel 11 that is also attached to the lower front side. The upper case 1b is attached in such a manner as to cover the latter half of the lower case 1a, and the front half of the lower case 1a is attached to the front upper edge of the upper case 1b by a top cover 1c pivotally supported at its rear portion from the front side. It is covered so that it can be opened and closed.

FIG. 1 shows a state in which the upper case 1b and the upper cover 1c are removed. The inside of the lower case 1a is separated into a dust collection chamber 13 on the front side and a blower chamber 14 on the rear side by partition ribs 12 that cross the substantial center in the width direction. Dust collection chamber 13
The front part of the is covered by the front cover 21, and the bellows hose
A suction pipe 30 connected to a suction tool (not shown) is connected via 31. Inside the dust collection chamber 13, the dust-collecting paper pack 3 faces the connection end of the suction pipe 30 and is detachable. It is installed. The upper lid cover 1c is opened and closed when the paper pack 3 is attached and detached, and the upper part of the dust collection chamber 13 in which the paper pack 3 is mounted is covered by closing the upper lid cover 1c.

On the other hand, inside the blower chamber 14, an electric blower 4 is provided.
The cord reel 5 and the cord reel 5 are attached so as to be aligned in the width direction. The electric blower 4 has a turbo-type blower 41 integrated with one side of an electric motor 40 as a drive source.
The suction port of 41 is inserted in the blower chamber 14 toward the front side, that is, the partition rib 12 side, and the front and rear sides are supported by the vibration-proof rubbers 42 and 43, and the upper case 1b is attached to the lower case.
It is fixed by holding it vertically with 1a.

The partition rib 12 at the front of the blower chamber 14 has a blower.
A communication port (not shown) that opens into the dust collection chamber 13 is provided at a position aligned with the suction port of 41, and when the blower 41 is rotationally driven by the electric motor 40, the inside of the dust collection chamber 13 is communicated with the communication port. It is evacuated by the intake air of the blower 41 generated through the mouth. The paper pack 3 installed in the dust collection chamber 13 has air permeability, and the vacuum exhaust by the drive of the electric blower 4 does not occur.
The paper pack 3 also has a function of collecting the dust that is sucked through the suction pipe 30 in association with the vacuum exhaust.

At the communication port of the partition rib 12, the paper pack 3
A filter is attached to collect the dust that passes through the
The intake of air to the blower 41 is performed after cleaning is performed through two stages of dust collection by the paper pack 3 and the filter. The exhaust port 44 of the electric blower 4 is formed on the peripheral surface of the housing of the electric motor 40, and the intake air by the blower 41 is generated by the electric motor 40.
It is designed to flow through the inside, cool the inside, and then be exhausted.

The cord reel 5 is for winding and holding a power cord 50 for supplying power to the electric motor 40, and a reel body for winding the power cord 50 on one side of a reel base 51. 52 is rotatably supported by a cantilever.

FIG. 3 is a plan sectional view of the cord reel 5 as seen from below, and FIG. 4 is a view taken along the line IV-IV of FIG. As shown in the figure, the reel base 51 is a resin rectangular flat plate, and an insertion hole 54 of the support shaft 53 for inserting the support shaft 53 of the reel body 52 is formed so as to penetrate substantially the central portion. There is. On one side of the insertion hole 54, a wall rib 55 protruding toward one surface (front surface) side of the reel base 51 is used to surround the upper and lower sides and the rear side, and a supporting rib 56 lower than the wall rib 55 surrounds the front side. A chamber 60 is formed, and the control substrate 6 is placed in the substrate chamber 60.
Is attached.

The control board 6 performs predetermined control operations including starting and stopping of the electric blower 4, and is formed by mounting various circuit components on a rectangular printed board. A heat dissipation plate 7 is connected to one side of the control board 6. This heat sink 7
A triac 61, which is a circuit component for controlling the start and stop of the electric blower 4, is mounted on the upper part of the electric fan 4, and heat generated during operation of the triac 61 is released.

In the control board 6 as described above, the three corners are engaged with the support projections 57, 57 ... Protrudingly provided inside the board chamber 60, and the control board 6 is connected to the heat radiating plate 7 as shown in FIG. The wall ribs 55 are supported along the three sides except the installation portion. At this time, as shown in FIG. 3, the supporting ribs 56 are in a state in which the leading edge of the supporting ribs 56 is continuously brought into contact with the back surface of the heat radiating plate 7 in the vicinity of the connecting portion with the control board 6. Thus, the control board 6 has a reel base 51.
The wall ribs 55 and the supporting ribs are provided in the substrate chamber 60 formed on one surface.
56 and 56 are attached integrally in a state of being surrounded on the four sides on the back side.

As shown in FIG. 3, in the reel body 52, a support shaft 53 that is rotatably fitted to the shaft center portion is fitted into the insertion hole 54 from the rear surface side of the reel base 51, and the insertion hole 54 is inserted. The tip end of the support shaft 53 is engaged with the engaging means formed inside and is integrated with the reel base 51.

The opening end of the insertion hole 54 on the front surface side of the reel base 51 is mounted on the front surface of the reel base 51 as shown in FIG.
As shown in FIG. 2, the control board 6 is covered with a heat radiating plate 7 continuously provided on one side. The heat radiating plate 7 has an insertion hole.
A line-of-sight hole 7a is formed at a position aligned with 54, and the spindle 53 for mounting the reel main body 52 is inserted through the line-of-sight hole 7a through the line-of-sight hole 54 from the surface side of the reel base 51. It can be carried out in a closed state. As a result, there is no restriction on the mounting order of the control board 6 and the reel unit 52 on the reel base 51.

An annular spring chamber 8 is formed between the insertion portion of the support shaft 53 and the winding peripheral surface of the power cord 50 on the surface of the reel main body 52 that does not face the reel base 51. It is closed by a lid plate 80 fixed to the side surface of 52 with screws,
A spring spring (not shown) is housed in the spring chamber 8 by engaging both ends of the spindle 53 penetrating the spring chamber 8 and the peripheral edge of the cover plate 80.

Further, a pair of ring electrodes 58, 58 are formed on the surface of the reel body 52 facing the reel base 51 so as to form a concentric ring around the axis. These are connected to the ends of the power cord 50 wound around the outer circumference inside the reel main body 52, and at a portion facing the reel base 51, a sliding contact (not shown) protruding from the reel base 51 is provided. It is in sliding contact with the child and constitutes a slip ring that draws the power supplied by the power cord 50 to the other side of the reel base 51.

From the lead-out end of the power supply by the slip ring, wiring to the electric blower 4 is performed, and a control board 6 for performing control operations including starting and stopping of the electric blower 4 is provided.
Wiring to the reel base 51.
It is integrally attached to the front side of the board, and before this installation, the wiring with the slip ring is performed, and this wiring is installed in the board chamber.
All you have to do is to install it as described above while putting it together in 60,
The mounting of the control board 6 is completed without any troublesome wiring process.

Further, since the line-of-sight hole 7a is formed in the heat dissipation plate 7, after the control board 6 is attached, the reel unit
52 can be assembled. Therefore, the attachment of the control board 6 involving the above-described wiring process may be performed on the light-weight reel base 51 having a flat plate shape, and good workability can be obtained.

As shown in FIG. 1, the cord reel 5 in which the control board 6 is integrated in this way is such that the lower portion of the reel base 51 is fitted into the blower chamber 14 at a predetermined position facing one side of the electric blower 4. , The tip of the support shaft 53 protruding to the other side of the reel body 52 is engaged with a part of the inner wall of the lower case 1a, and the upper case 1b is attached in this state, whereby the reel base
51 and the tip of the support shaft 53 are sandwiched between the lower case 1a and fixed.

By this fixing, the support shaft 53 is moved in the vertical direction and the axial direction, and is restrained from rotating about its axis. FIG. 5 is an explanatory view of the fixing structure of the support shaft 53, and shows an end portion (base end portion) on the side of fitting with the reel base 51 as the front side.

The support shaft 53 is a molded product made of resin, and has a small diameter portion 53b and a rectangular portion 53c which are fitted to the insertion holes 54 of the reel base 51 on both sides of the large diameter portion 53a which is fitted to the reel body 52. And are connected in series. The large-diameter portion 53a and the small-diameter portion 53b are formed by forming grooves for reducing the surface pressure in the respective fitting portions on the circumferential surface of the shaft having a circular cross section, as shown in the drawing, and the tip of the small-diameter portion 53b has a radius. Engaging protrusions 53d, 53d are provided so as to project to both sides in the direction.

On the other hand, as shown in FIG. 4, the insertion hole 54 of the reel base 51 is provided with a concave portion vertically aligned with the engaging projections 53d, 53d, and has a sectional shape corresponding to the tip of the small diameter portion 53b. The small diameter portion 53b of the support shaft 53 has the engaging projection 5
The engaging projections 53d and 53d are inserted into the insertion hole 54 by fitting them into the insertion hole 54 with the 3d and 53d facing up and down and rotating them 90 °.
Is fixed by engaging with the peripheral edge of. At this time, the engaging protrusion
Since 53d and 53d function to prevent the reel base 51 from coming off, the reel main body 52 fitted and held in the large diameter portion 53a.
Are supported on one side of the reel base 51 without slipping out.

The rectangular portion 53c on the tip side of the large diameter portion 53a is continuously provided via a collar portion 53e having a predetermined thickness. As shown in FIG. 3, the collar portion 53e is a portion that comes into contact with the peripheral edge of the fitting hole of the reel body 52 and restrains the movement of the reel body 52 toward the tip side of the support shaft 53. As shown in FIG. 3, the rectangular portion 53c continuously provided on the side penetrates the axial center portion of the spring chamber 8 and is projected to the outside of the reel body 52.

On one surface of the rectangular portion 53c, the collar portion is
There is a vertical groove 53f that extends to 53e.
Are used to engage the ends of a spring spring mounted in the spring chamber 8 together with the cover plate 80.

As described above, the tip end of the rectangular portion 53c protruding from the reel body 52 is a portion used for engaging the support shaft 53 with the inner wall of the lower case 1a, and is provided so as to project to both sides. It is provided with engaging protrusions 53g, 53g. On the other hand, at a position corresponding to the inner wall of the lower case 1a, a pair of pressing ribs 15 and 15 are provided at intervals corresponding to the width of the rectangular portion 53c, and between them, the upper portion is supported with a predetermined length left therebetween. A base 16 is laid horizontally, and on the inner rear side of the support base 16, between the inner wall of the lower case 1a and the lateral groove 17 having a width corresponding to the thickness of the engaging protrusions 53g, 53g. Are formed.

For the lower case 1a constructed as described above,
The rectangular portion 53c at the tip of the support shaft 53 has the pressing ribs 15g with the engaging projections 53g, 53g directed vertically, as indicated by the arrow in FIG.
It is inserted between 15, and the lower engagement protrusion 53g is fitted into the lateral groove 17 and engaged. By this engagement, the support shaft 53 is restrained from rotating due to the contact between the side surface of the rectangular portion 53c and the inner side surfaces of the pressing ribs 15 and 15, and the axial length is increased by the engagement of the engaging projection 53g in the lateral groove 17. It will be in a state where the direction is retained,
Further, when the upper case 1b is attached in this state, the upper case 1b is constrained in the vertical direction with respect to the upper surface of the support stand 16 and, as a result, the upper case 1b is constrained and fixed in the vertical, front-rear, and left-right directions.

In this fixing, the reel base 52 is attached to the reel base 51.
And the control board 6 is attached to form the cord reel 5,
When the reel base 51 is fitted into the lower case 1a, the tip of the support shaft 53 protruding to one side is fitted between the pressing ribs 15 and 15 from above, and easily achieved by the procedure of attaching the upper case 1b in this state. To be done.

As is apparent from FIG. 5, the engagement projections 53g, 53g on the tip side of the support shaft 53 and the engagement projections 53d, 53d on the base end side are provided so as to project in directions substantially orthogonal to each other. When the tip end of the support shaft 53 is engaged as described above, the engagement protrusion 5 on the base end side
The 3d and 53d are always oriented laterally. These engagement projections 53d, 53d are engaged with the insertion holes 54 of the reel base 51 as described above. This engagement is because the insertion holes 54 have the shape shown in FIG. Maintained by holding 53d, 53d in the lateral position.

Therefore, the reel base is fixed by the above-mentioned fixing.
The reel body 52 is also prevented from coming off from the 51, and the reel body 52 is freely rotated with slippage at the fitting portion with the large-diameter portion 53a. The mainspring spring serves to urge the reel unit 52 to rotate in one direction.

As shown in FIG. 1, the power cord 50 wound around the reel body 52 is projected to the outside from a pull-out hole formed in the lower rear portion of the lower case 1a, and the front end portion is gripped to move backward. By pulling, the reel body 52 can be appropriately pulled out with the rotation of the reel spring against the spring force of the mainspring spring. It
When the stopper is released, the power cord 50
Reel body 52 that is rotated by the spring force of the mainspring spring
To be wound up.

The reel base 51 of the cord reel 5 is provided with a large number of vent holes 59, 59 ... (See FIG. 4) penetrating in the thickness direction, and the exhaust air from the electric blower 4 is exhausted from the vent hole 5.
After passing through 9, 59 ..., It is sprayed on the reel body 52, is used for cooling the power cord 50, and is then discharged to the rear of the body case 1. Such an exhaust flow is indicated by an outline arrow in FIG.

As described above, the front side of the control board 6 which is surrounded by the wall ribs 55 and the support ribs 56 on the four sides on the back side is a vertical rib erected on the lower case 1a by the above-described attachment of the cord reel 5. The support ribs 56 are surrounded by 18 at substantially the same height as the wall ribs 55, and the upper case
The cover plate 19 provided on the lower side of 1b covers the entire surrounding area of the vertical ribs 18 and the wall ribs 55. The vertical ribs 18 and the cover plate 19 are shown by a two-dot chain line in FIG. 3, and the protruding position of the vertical ribs 18 is
It is indicated by a broken line in FIG.

That is, the control board 6 is surrounded on four sides by the wall ribs 55 and the support ribs 56 of the reel base 51 and the vertical ribs 18 of the lower case, and also the cover plate 19 protruding from the upper case 1b. Both sides of the reel base 51 are covered with the reel base 51 and are separated from the flow of exhaust gas generated as described above. Collides with the heat dissipation plate 7 that covers the front surface of the. Therefore, the triac 61 mounted on the heat dissipation plate 7 is cooled by heat exchange with the exhaust gas generated through the heat dissipation plate 7.

A large number of vent holes 7b, 7b ... Are penetratingly formed in the heat radiating plate 7, and the exhaust gas colliding with the heat radiating plate 7 flows out to the rear surface side through these vent holes 7b, 7b. Stand 51
It is sprayed onto the reel body 52 through the ventilation holes 59, 59 ...

[0042]

As described above in detail, in the electric vacuum cleaner according to the present invention, the control board which constitutes the control circuit for various operation controls including the start / stop control is the cord for winding and holding the power cord. Since it is integrally attached to the base of the reel, the wiring process for connecting the power cord and the control board is easy, and the assembly is completed by attaching the unitized cord reel including this wiring to the main body case. As a result, the present invention has excellent effects such as improvement in assembly workability.

[Brief description of drawings]

FIG. 1 is a plan view showing an internal structure of an electric vacuum cleaner according to the present invention.

FIG. 2 is a side view showing a part of the electric vacuum cleaner according to the present invention in a cutaway manner.

FIG. 3 is a plan cross-sectional view of a cord reel in the electric vacuum cleaner according to the present invention.

4 is a view taken along the line IV-IV in FIG.

FIG. 5 is an explanatory diagram of a fixing structure of a support shaft of a cord reel.

[Explanation of symbols]

 1 Main body case 1a Lower case 1b Upper case 1c Upper cover 4 Electric blower 5 Cord reel 6 Control board 7 Heat sink 7a Line-of-sight hole 7b Vent hole 13 Dust collection chamber 14 Blower room 50 Power cord 51 Reel base 52 Reel body 53 Spindle

 ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Ritsuzo Kobayashi 2-5-5 Keihan Hondori, Moriguchi-shi, Osaka Sanyo Electric Co., Ltd. (72) Mitsuru Nishizawa 2-chome, Keihan-hondori, Moriguchi-shi, Osaka No. 5-5 Sanyo Electric Co., Ltd.

Claims (1)

[Claims] 1. An electric vacuum cleaner in which a power cord for supplying power to an electric blower for evacuating a dust collecting chamber is wound around and held by a cord reel supported by a reel base,
An electric vacuum cleaner comprising a control circuit for constituting an operation control for starting and stopping the electric blower and integrally attached to the reel base.