JPH05285072A - Vacuum cleaner - Google Patents

Abstract

PURPOSE:To obtain a vacuum cleaner which allows the housing thereof compact when it is not used and is made free from damaging a floor surface in use with ease of handling. CONSTITUTION:The center of gravity of the main body 1 of a cleaner is within an outer circumference of a main wheel 3 and a part of the outer circumference of the main wheel 3 is outside the rear end face 13 and the bottom surface 12 of the main body 1 of the cleaner.

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, and more particularly, to an improvement of an electric vacuum cleaner body having a dust collection chamber, a blower motor and the like.

[0002]

2. Description of the Related Art FIG. 12 is a side view showing an example of a conventional vacuum cleaner. In the figure, 1 is a cleaner body incorporating a blower mode, a dust collecting chamber, etc., 2 is its front wheel, 3 is a pair of main wheels, 4 is an axle of the main wheel 3, and 5 is an upper handle. 6 is a hose having a joint 7 with the cleaner body 1 at one end and a hand pipe 8 having a hand switch at the other end, 9 is an extension pipe connected to the hand pipe 8, and 10 is an extension pipe 9 is a floor brush attached to the tip portion of 9. In addition, 11 is a floor surface and G is the center of gravity of the cleaner body 1.

In using the electric vacuum cleaner, a cord (not shown) is inserted into the power source, and the joint portion 7 of the hose 6 is connected to the cleaner main body 1. Then, the user grips the hand pipe 8 and operates the hand switch to move the floor brush 10 along the floor surface 11 to suck dust and the like on the floor surface for cleaning. As the cleaning progresses, the front wheels 2 and the main wheels 3 rotate on the floor surface 11 to move the cleaner body 1.

However, when cleaning the top of the shelf, the ceiling, or the upper part of the curtain, the floor brush 10 (or other attachment) cannot reach if the cleaner body 1 is left as it is. , The upper handle 5 is used to lift the cleaner body 1 for cleaning, or the hose 9 is pulled to clean the cleaner body 1 as shown in FIG.
Was standing on the floor 25 for cleaning. Since such an operation puts a considerable burden on the user's hand or arm, it is difficult to continuously perform the above three-dimensional cleaning.
Such a problem is caused by the center of gravity G of the cleaner body 1.
This is because the distance Lg between the axles 4 of the main wheels 3 is long.

In order to solve such a problem, FIG.
An electric vacuum cleaner as shown in FIGS. 4, 15, and 17 has been proposed. In the vacuum cleaner shown in FIG. 14, main wheels 3 larger than the vacuum cleaner main body 1 are attached to both sides of the vacuum cleaner main body 1. In such a vacuum cleaner, the joint of the hose 6 is used during cleaning. The part 7 hits the floor surface 11, and the floor surface 11
It is not practical because it will scratch the.

The electric vacuum cleaner shown in FIG. 15 has a front wheel 2 and a main wheel 3, and in particular, the outer diameter D of the main wheel 3 is larger than the total height H of the cleaner body 1 and the outer circumference of the main wheel 3 is large. Is attached to the cleaner body 1 so as to be behind the rear end surface of the cleaner body 1. In such a vacuum cleaner,
Since the outer periphery of the main wheel 3 is behind the outer end surface of the cleaner body 1, the cleaner body 1 cannot be used upright as shown in FIG. 13, and a state as shown in FIG. 16 occurs. Then, the front portion of the top surface 11 of the cleaner body 1 collides with the floor surface 25 and damages the floor surface 25, so the hose 6 must always be pulled to lift the front portion of the cleaner body 1. , It's extremely inconvenient.

The vacuum cleaner shown in FIG. 17 is one in which the axle 4 of the main wheel 3 is moved forward to bring it closer to the center of gravity G. In this case, when it is used in an upright position as shown in FIG. , The corner of the rear end surface 13 of the cleaner body 1 is the floor surface 11
However, there is a problem that the floor surface 11 is damaged by the collision with the above. Further, when the cleaner main body 1 is erected to stand up for the use state as shown in FIG. 13, the fulcrum becomes a corner portion of the rear end surface 13 of the cleaning main body 1, so that the distance from the center of gravity G is increased. For this reason, the burden on the arm and the like is not reduced, and the user is greatly tired.

The present invention has been made in order to solve the above-mentioned problems, and it is easy to use, there is no fear of scratching the floor surface when it is used, and it can be compactly graded when not in use. The purpose is to obtain an electric vacuum cleaner.

[0009]

In the vacuum cleaner according to the present invention, the center of gravity of the cleaner body is inside the outer circumference of the main wheel, and a part of the outer circumference of the main wheel is located at the rear end surface and the bottom surface of the cleaner body. It is configured to be on the outside.

Further, in the above electric vacuum cleaner, the outer diameter of the main wheel is 50% or more of the total length of the main body of the vacuum cleaner,
Alternatively, in a state where the cleaner body is erected on the floor surface, its center of gravity is on the top surface side of a line passing through the axles of the main wheels and perpendicular to the floor surface. Further, a support member is provided on the top surface side of the line connecting the axle and the center of gravity of the rear end surface of the cleaner body.

Further, the center of gravity of the cleaner main body is located in front of the axle and on the top surface side, or the center of gravity of the blower motor and the cord reel built in the cleaner main body is located in front of the main wheel within the outer circumference of the main wheel. It is designed to be on the top side. Further, the distance from the axle of the main wheel to the front wheel is approximately twice the distance from the axle to the center of gravity.

[0012]

With the construction of the present invention, the distance between the center of gravity and the axle becomes short, so that the vacuum cleaner main body can be erected with a small lifting force. It does not touch the surface. further,
After standing, it is stably held in that position. Also, the center of gravity of the vacuum cleaner body is usually slightly behind the center, so
By setting the outer diameter D of the main wheel to be 50% or more of the total length of the cleaner body, the center of gravity is automatically located within the outer circumference of the main wheel.

Next, when the cleaner body is erected on the floor surface, the center of gravity of the cleaner body is located on the top side of the line passing through the axle and perpendicular to the floor surface. It can stand on the floor and can be stored compactly. In addition, by attaching a support member to the rear end surface of the cleaner body, even when the center of gravity of the cleaner body is upright when it is on the bottom side of the line passing through the axle and perpendicular to the floor surface,
The cleaner body can be stood upright and can be stored compactly. Furthermore, since the specifications of the parts to be housed inside the vacuum cleaner body have changed during the development, even if the position of the center of gravity moves, the development can be continued simply by providing the support member without modifying the rear end surface.

Further, by positioning the center of gravity of the cleaner main body on the front side of the axle and on the top side, the cleaner main body can be erected on the floor with a slight force, and the upper handle is provided. It can be transported in a well-balanced manner even when moving. Further, since the center of gravity of the blower motor and the cord reel built in the cleaner body are respectively located in front of the axle and on the top surface side within the outer periphery of the main wheel, the center of gravity of the cleaner body is located in front of and above the axle. be able to.

Since the distance from the axle to the front wheels is approximately twice the distance from the axle to the center of gravity, the cleaner body can be swung with a small force and a small turning radius.
Moreover, it does not fall when turning.

[0016]

【Example】

First Embodiment FIG. 1 is an explanatory diagram of a first embodiment of the present invention. In the figure, 1 is a cleaner body having a blower motor, a dust collecting chamber, etc. built in, 11 is the top surface, 12 is the bottom surface, and 13 is the rear end surface. Reference numeral 2 is a front wheel attached to the front side of the bottom surface 12, 3 is a pair of main wheels provided at the rear portions on both sides of the cleaner body 1, 4 is an axle thereof, and 5 is an upper handle provided on the top surface 11. .. 6
Is a hose, one end of which is provided with a joint portion 7 which is connected to the insertion portion 14 provided on the front surface of the cleaner body 1, and the other end of which is attached a hand pipe (not shown) having a hand switch. Has been. 25 is the floor surface, and G is the center of gravity of the cleaner body 1.

In this embodiment, as shown in FIG.
The center of gravity of the cleaner body 1 is located inside the outer circumference of the main wheel 3, and a part of the outer circumference of the main wheel 3 is
Are located outside the bottom surface 12 and the rear end surface 13. Therefore, the distance Lg between the center of gravity G of the cleaner body 1 and the axle 4 of the main wheel 3 can be made shorter than before.

Table 1 shows the vacuum cleaner body 1 of FIG. 2 according to this embodiment.
Shows the data obtained by actually measuring the force F required to lift the insertion portion 14 to stand on the floor surface 25 and the data obtained by actually measuring the force F required to stand the conventional cleaner body on the floor surface. .. In FIG. 2, L is the entire length of the cleaner body 1, Lg is the distance between the axle 4 and the center of gravity G, Ld is the distance between the axle 4 and the outer circumference of the main wheel 3, and thus the radius of the main wheel 3,
D is the diameter of the main wheel 3. Further, in Table 1, Type A indicates the vacuum cleaner according to this embodiment, Type B indicates the conventional vacuum cleaner described in FIG. 12, and Type C indicates the conventional vacuum cleaner described in FIG.

[0019]

[Table 1]

As is clear from Table 1, the lifting force F
Irrespective of the weight of the cleaner body 1 and the diameter D of the main wheels 3,
It can be seen that the shorter the distance Lg between the center of gravity G and the axle 4, the smaller the distance Lg. However, in the case of the type C (vacuum cleaner of FIG. 17), the lifting force F is relatively small in the middle, but after the rear end surface 13 of the cleaner body 1 contacts the floor surface 25, the lifting force F is Grows very large. Therefore,
With the configuration of this embodiment, the distance Lg between the center of gravity G and the axle 4 becomes short, so that the cleaner body 1 can be stood with a small lifting force F, and the cleaner body 1 can The end face does not come into contact with the floor surface 25, and is stably held in that position after standing up.

As described above, for example, as shown in FIG. 13, when the main body 1 of the cleaner is erected on the floor surface 25 and the upper part of any room such as a shelf, a ceiling or a curtain is three-dimensionally cleaned, the cleaning is performed. Since the machine body 1 can be easily stood with a small force, the burden on the hands and arms can be reduced. Also,
Even when climbing over a step such as a sill, the front wheel 2 easily separates from the floor surface 25, so that the cleaner body 1 can be moved without applying force. Further, even when returning from the upright state to the normal state, since the impact on the floor surface 25 is small, the floor surface 25 is not damaged.

Embodiment 2 FIG. 3 is an explanatory diagram of a second embodiment of the present invention. 1
Reference numeral 5 denotes a dust collecting chamber arranged in the cleaner body 1. In this embodiment, in the first embodiment, the diameter D of the main wheel 3 is
50% or more of the total length L of the cleaner body 1, that is,
D> L / 2.

Generally, the center of gravity of the main body of the vacuum cleaner is located slightly behind the half of the total length L thereof. This is because the dust collecting chamber 15 is arranged in the front part of the cleaner body 1, and the blower motor and the like are arranged behind it. Therefore, if the outer diameter D of the main wheel 3 is set to 50% or more of the total length L of the cleaner body 1, the center of gravity G is within the outer circumference of the main wheel 3 even if the position of the center of gravity G is unknown. Will be located. According to this embodiment, the first embodiment can be realized with a simple configuration.

Embodiment 3 FIG. 4 is an explanatory view of the third embodiment of the present invention, in which the cleaner body 1
Shows the state of standing on the floor surface 25. Reference numeral 16 is a lower handle provided on the bottom surface of the cleaner main body 1, and 17 is a projection portion which is provided on the top surface 11 side of the rear end surface 13 so as to project to the same level as the outer circumference of the main wheel 3. In the present embodiment, with the cleaner body 1 in an upright position, the main wheel 3 is set in the first, second, third, and fourth quadrants counterclockwise from the upper right centering on the axle 4, and the cleaner body 1 is Stand up and the outer periphery of the main wheel 3 and the protrusion 17 are on the floor 2
When it comes into contact with the vehicle 5 and stops, the center of gravity G is in the first quadrant, that is, the top surface 11 from the line P passing through the axle 4 and perpendicular to the floor surface 25.
It is configured to be located on the side and in front of the axle 4.

In the present embodiment constructed as described above,
Now, when the cleaner body 1 is tilted down on the temporary floor surface 25a (returned to the normal state), the center of gravity G is located in the second quadrant. And
When the cleaner body 1 is gradually raised while holding the lower handle 16, the center of gravity G moves from the second quadrant to the first quadrant, and the protrusion 17
Comes into contact with the floor surface 20 and stops. Here, the cleaner body 1
If the center of gravity G is in the second quadrant when
The cleaner body 1 is prone to fall to the temporary floor surface 25a side and is in an extremely unstable state. If the center of gravity G is located in the third quadrant, the protrusion 17 stops without coming into contact with the floor surface 25, resulting in a very unstable state. However, since the vacuum cleaner main body 1 can be stably stood by the configuration of the present embodiment, it is extremely stable not only during cleaning but also during storage, and the vacuum cleaner can be stored compactly. You can

Embodiment 4 In the above-described third embodiment (FIG. 4), when the center of gravity G of the cleaner body 1 is in the second quadrant of the main wheel 3, the cleaner body 1 is raised as described above. Although it becomes extremely unstable when it is turned on, in order to stabilize it, the cleaner main body 1 may be tilted to stand so that the center of gravity G is in the first quadrant. That is, a line P passing through the axle 4 of FIG. 4 and perpendicular to the floor surface 20.
And the angle θ formed by P ₁ connecting the axle 4 and the center of gravity G ₁ or θ
When the cleaner body 1 is tilted by + α, the center of gravity G is located in the first quadrant.

FIG. 5 is an explanatory diagram of the fourth embodiment of the present invention. In this embodiment, a support member 18 made of a soft material such as rubber is provided on the rear surface 13 of the cleaner body 1 on the top surface 11 side of the line connecting the axle 4 and the center of gravity G. In addition,
In the figure, P is a line passing through the axle 4 and perpendicular to the floor surface 20,
₁ is θ or θ on the bottom surface 12 side with respect to the perpendicular P passing through the axle 4.
It is a line inclined by + α.

In the present embodiment constructed as described above,
When the vacuum cleaner body 1 is made to stand up while holding the lower handle 16,
The support member 18 contacts the floor surface 25 and stops. At this time, if the length (height) of the support member 18 is set so that the cleaner body 1 is inclined to the bottom surface 12 side by θ or θ + α with respect to the perpendicular P, the center of gravity G of the cleaner body 1 is a line. To the right of P ₁ ,
That is, since it is located in the first quadrant, the cleaner body 1 can be stood upright. In this case, instead of setting the length (height) of the support member 18 to a desired value, its mounting position may be changed.

Although the supporting member 18 made of a soft material such as rubber is provided in the above description, the supporting member 18 may be configured so that its height and position can be adjusted, or can be expanded and contracted by a spring or the like. You may comprise.

Since the present embodiment is configured as described above, even when the position of the center of gravity G of the cleaner body 1 is moved due to a change in parts or a change in specifications such as additional parts during the development of the vacuum cleaner, for example. , The rear end surface 13 of the cleaner body 1 is modified by providing the support member 18 (for example, the protrusion 1
7), the center of gravity G of the cleaner main body 1 can be positioned in the first quadrant without the need for the height and position of the cleaner 7. Therefore, the development can be continued, and the development can be performed inexpensively in a short period of time. .. Further, when the dust collecting chamber 15 collects dust or the like, the center of gravity G of the cleaner body 1 moves, but the height or position of the support member 18 can be moved, or the support member 18 can be expanded and contracted. , The center of gravity G can always be located in the first quadrant, which is convenient for cleaning and storing in high places.

Embodiment 5 FIG. 6 is an explanatory view of the fifth embodiment of the present invention. In the present embodiment, when the cleaner body 1 is placed on the floor surface 25 in a normal state, the center of gravity G is within the outer periphery of the main wheel 3 and the axle 4 is located.
It is configured to be located in front of and above, that is, in the second quadrant. When the lower handle 16 is lifted up in the present embodiment constructed as described above, the front wheels 2 are separated from the floor surface 20, the cleaner body 1 stands up while rotating around the axle 4, and finally the bearing is supported. The member 18 contacts the floor surface 20 and stops. At this time, the center of gravity G passes right above the axle 4 around the axle 4 in the clockwise direction (the center of gravity G is counterclockwise on the opposite side surface). Then, after the center of gravity G has passed right above the axle 4, the cleaner body 1 stands up by itself without any force.

By the way, what if the center of gravity G of the cleaner body 1 is located in another quadrant? First, when the center of gravity G is located in the third quadrant, when the center of gravity G reaches directly above the axle 4 in the above-described operation, the cleaner body 1 is in a state of being upright. , It takes a lot of power to stand upright. On the other hand, when the center of gravity G is in the first quadrant or the fourth quadrant, the front wheels 2 are separated from the floor surface 25. Therefore, during cleaning, the front wheel 2 moves while constantly bouncing on the floor surface 25, which is not preferable because noise is generated or the floor surface 2 is scratched, and a load is applied only to the spindle 4. There are problems such as severe wear of the axle 4.

In this embodiment, since the center of gravity G is in the second quadrant, the above problem does not occur, and since the center of gravity G is located near the center of the cleaner body 1, the upper handle 5
Good balance when moving with holding
Convenient for transportation.

Sixth Embodiment FIG. 7 is an explanatory view of a sixth embodiment of the present invention, in which 19 is a blower motor incorporated in the cleaner body 1, and 20 is a cord reel. In the present embodiment, the motor 19 and the cord reel 20 are arranged in the cleaner body 1 so that their centers of gravity GM and GC are located in front of and above the axle 4, that is, in the second quadrant. ..

The vacuum cleaner body 1 usually weighs about 3 to 6 kg.
Among them, the motor 19 is about 1.5 kg and the cord reel 20 is about 0.8 to 1 kg, and these two parts occupy most of the total weight of the parts built in the cleaner body 1. Therefore, the position of the center of gravity G of the cleaner body 1 is influenced.

The center of gravity G of the conventional cleaner body 1 is normally at a height position of about 1/3 of the total height H. By the way, in the vacuum cleaner in which the outer diameter D of the main wheel 3 is 50% or more of the total length L of the cleaner body 1 as in the second embodiment (FIG. 3), the axle 4 is inevitably The position becomes higher, and the center of gravity G of the cleaner body 1 is below the axle 4. Therefore, with the configuration according to the present embodiment, the center of gravity G of the cleaner body 1 becomes higher and the cleaner body 1 is located above the axle 4.

[Embodiment 7] As is well known, when using an electric vacuum cleaner, cleaning is performed by pulling the main body of the vacuum cleaner forward and backward or by turning it left and right. In this case, the forward and backward movement mainly depends on the main wheels, and the turning mainly depends on the front wheels, and it is desirable that the turning can be performed with a small force and a small turning radius.

FIG. 8 is an explanatory view of the seventh embodiment according to the present invention. In the present embodiment, the distance Lw from the axle 4 to the front wheel 2 is approximately twice the distance Lg from the axle 4 to the center of gravity G, that is, 2Lg ≧ Lw, and the front wheel 2 is provided at that position. is there.

The inventors of the present invention conducted various tests on the turning function of the cleaner body 1 according to the present invention, and obtained a lot of data on the turning radius, the turning force, and the fall. Here, the turning radius means the floor surface 2 of the main wheel 3 as shown in FIG.
Distance W from the contact point 3P to 5 to the turning trajectory of the front wheel 2
The rotation force T means the force required when the cleaner body 1 is swung with the hose 6.

FIG. 10 shows the distance Lw between the axle 4 and the front wheel 2.
Is more than twice the distance Lg from the axle 4 to the center of gravity G, that is, 2Lg <Lw (hereinafter referred to as case Y),
FIG. 11 shows the case where Lg = Lw (hereinafter referred to as case Z).
Is shown. Note that the present embodiment shown in FIG. 8 is referred to as case X. Table 2 shows the results of performing the test 5 times for each of the above X, Y, and Z examples.

[0041]

[Table 2]

As is clear from Table 2, in the case of the case Y, the rotational force T is small and the vehicle does not tip over when turning, but the turning radius Wb is large because the front wheel 2 is located away from the axle 4. Become. Further, in the case of Case Z, the turning radius Wb is small, but since the front wheel 2 is almost directly below the center of gravity G, the total weight of the cleaner body 1 is applied to the front wheel 2, and thus a large turning force T is required. , More falls. On the other hand, in the case X, that is, in the present embodiment, the turning radius Wb is approximately in the middle of the cases Y and Z, the turning force T is half of the case Z and equal to the case Y, and the number of falls is 0. there were.

From the above, the distance Lw between the axle 4 and the front wheel 2 is approximately 2 times the distance Lg between the axle 4 and the center of gravity G.
It has been clarified that by setting twice, therefore, 2Lg ≧ Lw, the cleaner body 1 can be swung without tipping over with a small turning force T and a smaller turning radius Wb.

[0044]

As is apparent from the above description, according to the present invention, the following remarkable effects can be obtained. (1) Since the center of gravity of the cleaner body is inside the outer circumference of the main wheel, and part of the outer circumference of the main wheel is outside the rear end surface and bottom surface of the cleaner body, the distance between the center of gravity and the axle is As a result, the vacuum cleaner body can be erected on the floor with a small lifting force, and the burden on the arms and hands can be reduced during three-dimensional cleaning. Further, when the vacuum cleaner body stands on the floor surface, there is no risk that the rear end surface or the like collides with the floor surface, so that the floor surface is not damaged.

(2) Since the outer diameter of the main wheel is set to 50% or more of the total length of the cleaner main body, the center of gravity of the cleaner main body is located slightly rearward without considering the position of the center of gravity. , Can be automatically located within the outer circumference of the main wheel.

(3) Since the center of gravity of the cleaner body is set on the top side of the line passing through the axle and perpendicular to the floor surface when the cleaner body is set up, the stability is stable when the cleaner body is set up and used. Also, the cleaner body can be stood upright and stored in a compact space.

(4) Since the support member is provided on the rear end surface of the cleaner body, the center of gravity and the position of the axle can be adjusted in the upright state. Therefore, when the center of gravity is below or in the dust collection chamber. Even if dust or the like is accumulated, the cleaner body can be stood upright. Also, during the development of the vacuum cleaner, even if the center of gravity moves due to changes in the specifications of the parts to be housed inside the vacuum cleaner body, the bearing members can be attached without modifying the rear end surface of the vacuum cleaner body. Alternatively, it can be dealt with by changing its position or height, so the development can be continued as it is. Therefore, the development can be completed early at low cost.

(5) Since the center of gravity of the cleaner main body is positioned in front of the axle and on the top surface side, the cleaner main body can be made to stand on the floor surface with a slight force. It is possible to reduce the burden on the arm and arm. In addition, even when carrying the upper handle, it can be carried in a well-balanced manner.

(6) Since the center of gravity of the blower motor and the cord reel built in the cleaner body are set to be in front of the axle and on the top surface side within the outer circumference of the axle, respectively, the center of gravity of the cleaner body is located in front of the axle and It can be located above. Therefore, the present invention can be realized with a simple configuration.

(7) Since the distance from the axle to the front wheels is approximately twice the distance from the axle to the center of gravity, the cleaner main body can be swung with a small force and a small turning radius. There is no risk of falling when turning.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of a first embodiment of the present invention.

FIG. 2 is an explanatory view of the operation of the first embodiment.

FIG. 3 is an explanatory diagram of a second embodiment of the present invention.

FIG. 4 is an explanatory diagram of a third embodiment of the present invention.

FIG. 5 is an explanatory diagram of a fourth embodiment of the present invention.

FIG. 6 is an explanatory diagram of a fifth embodiment of the present invention.

FIG. 7 is an explanatory diagram of a sixth embodiment of the present invention.

FIG. 8 is an explanatory diagram of a seventh embodiment of the present invention.

FIG. 9 is a bottom view of FIG.

FIG. 10 is an explanatory diagram of a comparative example of the seventh embodiment.

FIG. 11 is an explanatory diagram of a comparative example of the seventh embodiment.

FIG. 12 is an explanatory diagram of an example of a conventional electric vacuum cleaner.

FIG. 13 is an operation explanatory view of the electric vacuum cleaner of FIG. 12.

FIG. 14 is an explanatory diagram of another example of the conventional electric vacuum cleaner.

FIG. 15 is an explanatory diagram of another example of the conventional electric vacuum cleaner.

FIG. 16 is an operation explanatory view of the electric vacuum cleaner of FIG. 15.

FIG. 17 is an explanatory diagram of another example of the conventional electric vacuum cleaner.

[Explanation of symbols]

 1 Vacuum cleaner body 2 Front wheel 3 Main wheel 4 Main shaft 5 Upper handle 6 Hose 7 Joint part 11 Top surface 12 Bottom surface 13 Rear end surface 15 Dust collection chamber 16 Lower handle 17 Protrusion 18 Bearing member 19 Blower motor 20 Cord reel 25 Floor

Front Page Continuation (72) Inventor Yutaka Takahashi 1728 Omaeda, Hanazono-cho, Osato-gun, Saitama 1 Mitsubishi Electric Home Equipment Co., Ltd.

Claims (7)

[Claims] 1. A dust collector, a blower motor, etc., which is built in, and which comprises a cleaner body having a front wheel and a pair of main wheels, and a hose connected to the cleaner body. In an electric vacuum cleaner that sucks dust and the like on the floor surface, the center of gravity of the cleaner body is inside the outer periphery of the main wheel, and part of the outer periphery of the main wheel is the rear end surface and the bottom surface of the cleaner body. Vacuum cleaner characterized by being on the outside. 2. The outer diameter of the main wheel is 50 of the total length of the cleaner body.
The vacuum cleaner according to claim 1, which has a size of not less than%. 3. The center of gravity of the cleaner body is on the top surface side of a line passing through the axles of the main wheels and perpendicular to the floor surface when the cleaner body is standing on the floor surface. The electric vacuum cleaner according to Item 1 or 2. 4. The electric vacuum cleaner according to claim 1, wherein a support member is provided on a rear end surface of the cleaner body on a top surface side of a line connecting the axle and the center of gravity. 5. The center of gravity of the cleaner body is located in front of the axle and on the top side.
Vacuum cleaner as described. 6. The blower motor and the center of gravity of the cord reel built in the cleaner body are located in front of and on the top side of the main wheel in the outer periphery of the main wheel, respectively. Vacuum cleaner. 7. The distance from the axle of the main wheel to the front wheel is
7. The vacuum cleaner according to claim 1, wherein the distance from the axle to the center of gravity is approximately twice the distance.