KR950006708B1 - Vacuum-cleaner - Google Patents

Abstract

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Description

Vacuum cleaner

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

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

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

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

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

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

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

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

9 is a bottom view of FIG.

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

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

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

13 is a diagram illustrating the operation of the vacuum cleaner of FIG.

14 is an explanatory diagram of another example of a conventional vacuum cleaner.

15 is an explanatory diagram of another example of a conventional vacuum cleaner.

FIG. 16 is a diagram illustrating the operation of the vacuum cleaner of FIG. 15. FIG.

17 is an explanatory diagram of another example of a conventional vacuum cleaner.

* Explanation of symbols for main parts of the drawings

1: basic cleaning body 2: front wheel

3: main wheel 4: wheel axle

5: upper handle 6: hose

7: seam 11: top

12: bottom face 13: rear face

15: dust collecting chamber 16: lower handle

17 projections 18 support members

19: blower motor 20: electric wire winding wheel

25: floor surface

The present invention relates to an electric vacuum cleaner, and more particularly, to an improvement of an electric vacuum cleaner main body incorporating a dust collecting chamber, a blower motor, and the like.

12 is a side view showing an example of a conventional vacuum cleaner. In the drawings, reference numeral 1 denotes a cleaning main body including a blower motor and a dust collecting chamber, 2 denotes a front wheel, 3 denotes a pair of main wheels, and 4 denotes a wheel shaft of the main wheel 3. (5) is the upper handle. (6) has a joint (7) with an electric vacuum cleaner (1) at one end, a hose provided with a handle pipe (8) having a handle switch at the other end, (9) is connected to the handle pipe (8) Extension pipe (10) is a floor brush attached to the tip of the extension pipe (9). Reference numeral 25 denotes a floor surface, and G denotes the center of the cleaning body 1.

In the use of a vacuum cleaner, a cord (not shown) is plugged into a power source and the joint 7 of the hose 6 is connected to the cleaning base 1. Then, the user grasps the handle pipe 8 to operate the handle switch, and moves the floor brush 10 along the floor surface 25 to suck the dust on the floor surface for cleaning.

As the cleaning proceeds, the front wheel 2 and the main wheel 3 rotate on the floor surface 25 to move the cleaning body 1.

However, when cleaning the upper surface of the shelf, ceiling, or curtain, etc., the floor brush 10 (or other attachment) is not covered by the cleaning main body 1 as it is, and the upper handle 5 is held by the vacuum cleaner. The main body 1 was lifted and cleaned, or as shown in FIG. 13, the hose 6 was pulled and the cleaning main body 1 was raised on the floor 25 to perform the cleaning.

Since such an operation puts a considerable burden on a user's hand or arm, it is difficult to continuously clean it as described above.

This problem occurs because the distance Lg between the center G of the cleaning body 1 and the wheel shaft 4 of the main wheel 3 is long.

In order to solve such a problem, the vacuum cleaner as shown in FIG. 14, FIG. 15, and FIG. 17 is proposed. The vacuum cleaner shown in FIG. 14 attaches the main wheel 3 larger than the cleaning basic body 1 to both sides of the cleaning basic body 1, but in such a vacuum cleaner, the joint part of the hose 6 during the cleaning ( It is not practical because 7) touches the floor 25 and damages the floor 25.

In addition, the vacuum cleaner shown in FIG. 15 has a front wheel 2 and a main wheel 3, in particular, the outer diameter D of the main wheel 3 is larger than the total height H of the cleaning main body 1, and the main wheel The outer periphery of (3) is attached to the cleaning main body (1) so that it is behind the rear end surface of the cleaning main body (1).

In such a vacuum cleaner, since the outer circumference of the main wheel 3 is behind the outer end surface of the cleaning main body 1, the cleaning main body 1 cannot be stored upright, and as shown in FIG. When it occurs, the front of the top surface 11 of the cleaning body 1 hits the floor surface 25 and damages the floor surface 25 so that the hose 6 is always pulled up to lift the front of the cleaning body 1. It is very inconvenient to use because it needs to be raised.

The vacuum cleaner shown in FIG. 17 moves the wheel axle 4 of the main wheel 3 forward to approach the center G. In this case, if the vacuum cleaner is to be used in an upright position as shown in FIG. There is a problem that the edge portion of the rear end surface 13 collides with the floor surface 25 and damages the floor surface 25. In addition, if the cleaning main body 1 is to be erected in order to be in the use state as shown in FIG. 13, the point becomes the corner portion of the rear end face 13 of the cleaning main body 1, so the distance from the center G becomes farther. For this reason, the burden on an arm etc. is not alleviated and user fatigue is large.

An object of the present invention is to solve the above problems, to provide an electric vacuum cleaner that is convenient to use, there is no fear of damaging the floor surface when used and can be stored simply (compactly) when not in use .

The vacuum cleaner according to the present invention is located in the outer circumference of the main wheel of the center of the cleaning main body, and is configured so that a part of the outer circumference of the main wheel is outward of the rear end face and the bottom surface of the cleaning main body.

In the above-mentioned vacuum cleaner, the outer diameter of the main wheel is 50% or more of the total length of the cleaning main body, or the center of the main wheel passes through the wheel axis of the main wheel and is perpendicular to the floor surface with the cleaning main body placed on the floor surface. It is on the top surface side of the phosphorus line.

In addition, the support member is provided on the top surface side than the line connecting the wheel shaft and the center of the rear end surface of the cleaning body.

Also, the main body of the cleaning main body should be in front of the wheel axle and the top surface side, or the center of the blower motor and the electric wire winding unit built in the cleaning main body should be in the front and top side of the main wheel in the outer circumference of the main wheel, respectively. will be.

The distance from the wheel of the main wheel to the front wheel is approximately twice the distance from the wheel axle to the center.

Since the distance between the center and the wheel shaft is shortened by the configuration according to the present invention, it is possible to raise the cleaning main body without putting much effort to lift it, and the rear end face does not come into contact with the floor surface during the construction of the cleaning main body. In addition, after standing, it is stably held in the position.

In addition, since the center of the cleaning main body is usually slightly behind the center part, the center is automatically positioned in the outer circumference of the main wheel by making the outer diameter D of the main wheel 50% or more of the total length of the cleaning main body.

Next, when the cleaning main body is placed on the floor surface, the center can pass through the wheel shaft to be on the top surface side of the line perpendicular to the floor surface, so that the cleaning main body can be stably placed on the floor surface and can be stored simply.

In addition, when the cleaning main body is erected by attaching the supporting member to the rear end of the cleaning main body, the cleaning main body can be stably set even when its center is on the floor side rather than perpendicular to the floor surface through the wheel shaft. Can be. Moreover, even when the specification of the parts accommodated in the cleaning base body changes during the development and the center position is shifted, the development can be continued simply by providing a supporting member without producing the rear end face.

Further, by placing the center of the cleaning main body in front of the wheel shaft and on the top surface side, the cleaning main body can be placed on the floor with very little force, and it can be carried in a balanced manner even when the upper handle is moved.

In addition, the center of the blower motor and the electric wire winding unit built in the cleaning main body are located in front of the wheel axle and the top surface side in the outer circumference of the main wheel, respectively, so that the center of the cleaning main body can be moved forward and above the wheel axle.

Since the distance from the wheel axle to the front wheel is approximately twice the distance from the wheel axle to the center, it is possible to turn the cleaning main body with a small force and a small turning radius and not to turn over when turning.

Example 1

1 is an explanatory diagram of a first embodiment of the present invention. In the figure, reference numeral 1 denotes a cleaning main body including a blower motor, a dust collecting chamber, and the like, 11 denotes a top surface thereof, 12 denotes a bottom surface, and 13 denotes a rear cross section. (2) is the front wheel attached to the front side of the bottom surface (12), (3) is a pair of main wheels provided at both rear of the cleaning main body (1), (4) is the wheel axle, (5) The upper handle is provided on the top surface (11).

6 is a hose, one end of which is provided with a joint 7 connected to a plug 14 provided on the front surface of the cleaning base 1, and the other end of the handle pipe (not shown) provided with a handle switch. Not attached). Denoted at 25 is a floor surface, and G is the center of the cleaning body 1.

In this embodiment, as shown in FIG. 1, the center of the cleaning main body 1 is located inside the outer circumference of the main wheel 3, and part of the outer circumference of the main wheel 3 is the cleaning main body. It is located outward from the bottom face 12 and the back end face 13 of (1). For this reason, the distance Lg between the center G of the cleaning base body 1 and the wheel shaft 4 of the main wheel 3 can be made shorter than before.

Table 1 shows the data for measuring the force F required when lifting the plug 14 and mounting it on the floor 25 according to the present embodiment, and when mounting the conventional cleaning base on the floor. The measured data of the force F is shown. In FIG. 2, L is the total depth of the cleaning base body 1, Lg is the distance between the wheel axle 4 and the center G, and Ld is the distance to the outer periphery of the wheel axle 4 and the main wheel 3. As a result, the radius of the main wheel 3, D is the diameter of the main wheel (3). In Table 1, type A represents a vacuum cleaner according to the present embodiment, type B represents a conventional vacuum cleaner described in FIG. 12, and type C represents a conventional vacuum cleaner described in FIG.

TABLE 1

Note: The numbers in parentheses must be cleaned while lifting up

The force F after the rear end face of the base body contacts the floor surface is shown. As is clear from Table 1, it can be seen that the lifting force F becomes smaller as the distance Lg between G and the wheel shaft 4 becomes shorter, regardless of the weight of the cleaning base 1 or the diameter D of the main wheel 3. . However, in the case of type C (the vacuum cleaner of FIG. 17), the lifting force F is relatively small up to the middle, but the lifting force F becomes very large after the rear end 13 of the cleaning body 1 contacts the floor surface 25. .

Therefore, when the configuration as in the present embodiment, the distance between the center G and the wheel shaft 4 is shortened Lg, the cleaning main body 1 can be set up by the small lifting force F, and after the cleaning main body 1 on the way The end face never touches the floor surface 25 and is stably held in position after standing.

As described above, for example, as shown in FIG. 13, the cleaning main body 1 is placed on the floor surface 25 to clean the upper part of a room such as a shelf, a ceiling, or a curtain in three dimensions. ) Can be set up with a small force to reduce the burden on hands and arms.

In addition, since the front wheel 2 is simply separated from the floor surface 25 in the case where the terminal such as the threshold is crossed, the cleaning main body 1 can be moved without force.

Moreover, also when returning to a normal state from an upright state, since the impact on the floor surface 25 is small, it does not damage the floor surface 25. FIG.

Example 2

3 is an explanatory diagram of a second embodiment of the present invention. In addition, reference numeral 15 denotes a dust collecting chamber provided in the cleaning main body 1. In this embodiment, the diameter D of the main wheel 3 in the first embodiment is 50% or more of the total length L of the cleaning body 1, that is, D> L / 2.

In general, the center of the cleaning body is slightly behind half of its total length L. This is because the dust collecting chamber 15 is provided in the front part of the cleaning main body 1, and the blower motor etc. are provided in the back. Therefore, if the outer diameter D of the main wheel 3 is 50% or more of the total length L of the cleaning main body 1, for example, the center G is located inside the outer circumference of the main wheel 3 even if the position of the center G is unknown. Done.

According to this embodiment, the first embodiment can be realized with a simple configuration.

Example 3

4 is an explanatory view of a third embodiment of the present invention, showing a state in which the cleaning main body 1 is placed on the floor surface 25. In addition, (16) is the lower handle provided on the bottom surface of the cleaning body (1), (17) the height to the same plane as the outer circumference of the main wheel (3) on the top surface 11 side of the rear end surface (13) It is a projection provided to protrude into.

In this embodiment, the main wheel 3 is rotated in the first, second, third, and fourth upper limits in the counterclockwise direction from the upper right corner of the wheel shaft 4 with the cleaning main body 1 standing up. When the outer periphery of the main wheel 3 and the protrusion 17 contact with the floor surface 25 and are left standing with the cleaning main body 1 standing up, the center G passes through the first upper limit, that is, the wheel shaft 4. It is comprised so that it may be located in the top surface 11 side rather than the line P perpendicular | vertical to the floor surface 25, and located ahead of the wheel shaft 4. As shown in FIG.

In this embodiment comprised as mentioned above, when the cleaning main body 1 falls down on the virtual floor surface 25a (returns to normal state), the center G will be located in a 2nd upper limit. Then, when the cleaning main body 1 is gradually raised while holding the lower handle 16, the center G moves from the second upper limit to the first upper limit, and the protrusion 17 contacts the floor surface 25 and stops. Here, if the center G was in the 2nd upper limit when the cleaning main body 1 was built, the cleaning main body 1 will fall to the virtual floor surface 25a side, and is in a very unstable state. Moreover, if center G is located in a 3rd upper limit, since the projection part 17 will stop in the state which did not contact the floor surface 25, it will be in a very unstable state. However, since the cleaning main body 1 can be stably erected by the configuration as in the present embodiment, it is very stable during cleaning as well as during storage, and the vacuum cleaner can be easily stored.

Example 4

In the third embodiment (Fig. 4) described above, when the center G of the cleaning main body 1 is on the second upper limit of the main wheel 3, it is very unstable when the cleaning main body 1 is erected as described above. Although it will be in a state, in order to stabilize this, the cleaning base body 1 may be inclined and raised so that the center G may be in a 1st upper limit. That is, the cleaning base body is formed by an angle θ or θ + α formed by a line P perpendicular to the floor surface 25 through the wheel shaft 4 of FIG. 4 and P ₁ connecting the wheel shaft 4 and the center G ₁ . When 1) is tilted, the center G is located within the first upper limit.

5 is an explanatory diagram of a fourth embodiment of the present invention. In this embodiment, the support member 18 is made of a soft material such as rubber on the side of the top surface 11 of the line connecting the wheel shaft 4 and the center G of the rear end surface 13 of the cleaning body 1 to the center G. Will be prepared. In the drawing, P is a line perpendicular to the floor surface 25 passing through the wheel shaft 4, and P ₁ passes through the wheel shaft 4 and θ or θ on the bottom surface 12 side with respect to the vertical line P. It is a line inclined by + α.

In this embodiment configured as described above, the support member 18 comes into contact with the floor surface 25 and stops when the cleaning main body 1 is raised by holding the lower handle 16. At this time, if the length (height) of the support member 18 is set such that the cleaning main body 1 is inclined toward the bottom surface 12 by θ or θ + α with respect to the vertical line P, the center G of the cleaning main body 1 is P _1. Since it is located on the right side of, i.e., within the first upper limit, the cleaning body 1 can be stably set up. In this case, the attachment position may be changed instead of setting the length (height) of the support member 18 to a desired value.

In the above description, the case where the support member 18 made of a soft material such as rubber is provided has been described, but the support member 18 may be configured to be adjustable in height and position, or may be configured to be stretchable by a spring or the like.

Since the present embodiment is configured as described above, the support member 18 is moved even when the position of the center G of the cleaning base body 1 moves due to the change of the parts or the change of the specification, for example, during the development of the vacuum cleaner. By providing, the center G of the cleaning base body 1 can be positioned within the first upper limit without remodeling the rear end surface 13 of the cleaning body 1 (for example, the height and position of the protrusion 17). Therefore, development can be continued and low-cost development can be performed in a short time.

In addition, if dust and the like accumulate in the dust collecting chamber 15, the center G of the cleaning main body 1 moves, but if the height or position of the support member 18 is configured to be movable or stretchable, the center G is always removed. It can be located within one upper limit and is convenient for cleaning and storage of high places.

Example 5

6 is an explanatory diagram of a fifth embodiment of the present invention. In the present embodiment, when the cleaning main body 1 is placed on the floor surface 25 in a normal state, the center G is in front of the wheel shaft 4 in the outer circumference of the main wheel 3, and the upper side, i. It is configured to be located within two upper limits.

In this embodiment configured as described above, for example, when the lower handle 16 is lifted, the front wheel 2 is separated from the floor surface 25, and the cleaning base body 1 is raised while rotating about the wheel shaft 4. Finally, the support member 18 comes into contact with the floor surface 25 and stops. At this time, the center G passes just above the wheel shaft 4 clockwise about the wheel shaft 4 (on the opposite side, the center G becomes counterclockwise). And after the center G passes just above the wheel axle 4, even if it does not apply force, the cleaning base body 1 will go up by magnetic force. By the way, what if the center G of the cleaning main body 1 was located in another upper limit? First, when the center G is located in the third upper limit, when the center G reaches directly above the wheel shaft 4 in the above operation, the cleaning base body 1 is in a state exceeding the upright, so that the upright Until you need great power.

On the other hand, when the center G is in the 1st upper limit or the 4th upper limit, the front wheel 2 is in the state which fell to the floor surface 25. As shown in FIG. For this reason, since the front wheel 2 always moves on the floor surface 25 during cleaning, noise is generated or damages the floor surface 25, which is undesirable, and a load is applied only to the wheel shaft 4. And the abrasion of the wheel shaft 4 is severe.

In the present embodiment, since the center G is in the second upper limit, the above problems do not occur, and since the center G is located near the center of the cleaning main body 1, the upper handle 5 is moved by hand. Even in the case of good balance, it is convenient to carry.

Example 6

7 is an explanatory diagram of a sixth embodiment of the present invention, in which 19 is a blower motor built in the cleaning main body 1, and 20 is a wire winding unit in the same manner.

In the present embodiment, the motor 19 and the electric wire winding unit 20 are disposed in the cleaning main body 1 such that the centers GM and GC are located in front of the wheel shaft 4 and above, that is, the second upper limit. will be.

The weight of the cleaning body 1 is usually about 3 to 6 kg, of which the motor 19 is about 1.5 kg and the wire winding part 20 is about 0.8 to 1 kg, and these two parts are built in the cleaning body 1. It occupies most of the gross weight of the parts, and thus influences the position of the center G of the cleaning base body 1.

The center G of the conventional cleaning base body 1 was normally at the height position of about 1/3 of the total height H. FIG. By the way, as in the second embodiment (FIG. 3), 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 cleaning main body 1, the wheel shaft 4 is inevitably The position becomes high, and the center G of the cleaning base body 1 becomes lower than the wheel shaft 4.

Thus, when configured as in the present embodiment, the center G of the cleaning main body 1 is increased to be positioned above the wheel shaft 4.

Example 7

As is well known, in the use of an electric vacuum cleaner, the cleaning main body is moved by moving back and forth or by turning left and right while pulling with a hose. In this case, the forward and backward movement mainly depends on the main wheel, and the turning mainly depends on the front wheel, and it is preferable that the turning can be operated with a small force and a small turning radius. 8 is an explanatory diagram of a seventh embodiment according to the present invention. In this embodiment, the distance L _W from the wheel axle 4 to the front wheel 2 is approximately twice the distance Lg from the wheel axle 4 to the center G, that is, 2Lg? L _W , and the front wheel is at that position. (2) was prepared.

The inventors of the present invention conducted various tests on the turning function of the cleaning base body 1 according to the present invention to obtain a lot of data on the rotation radius, the rotational force and the conduction. Here, the rotation radius refers to the distance Wb from the contact point 3P to the floor surface 25 of the main wheel 3 to the turning trajectory of the front wheel 2, as shown in FIG. Lifting the hose (6) refers to the force required when turning the cleaning base (1).

FIG. 10 shows the case where the distance L _W between the wheel shaft 4 and the front wheel 2 is more than twice the distance Lg from the wheel shaft 4 to the center G, that is, 2Lg < L _W (hereinafter referred to as case Y). 11 shows the case where Lg = L _W (hereinafter referred to as case Z). In addition, this embodiment shown in FIG. 8 is called case X. In FIG.

Table 2 shows the results of five tests for each of X, Y, and Z as described above.

TABLE 2

As apparent from Table 2, in the case of the case Y, the rotational force T is small and does not invert during turning, but the rotation radius Wb becomes large because the front wheel 2 is located at a position away from the wheel shaft 4. Moreover, in the case of the case Z, although the rotation radius Wb is small, since the front wheel 2 is just underneath the center G, since the total weight of the cleaning main body 1 is applied to the front wheel 2, large rotational force T is needed. And evangelism also increases.

On the other hand, in case X, that is, in this embodiment, the rotation radius Wb is approximately halfway between the cases Y and Z, the rotational force T is 1/2 of the case Z, which is the same as the case Y, and the conduction frequency is zero.

Thus by the same, the wheel shaft 4 and approximately twice the distance L _W between the front wheels (2) to the distance Lg of the wheel axis to 4 and the center G, according to the small rotating force T by a 2Lg≥L _W As a result, it became clear that the cleaning basic body 1 could be rotated without falling over with a small rotation radius Wb.

As apparent from the above description, according to the present invention, the following remarkable effects can be obtained.

[1] The center of the main body of the cleaning body is located on the outer periphery of the main wheel, and part of the main body of the main wheel is located on the rear end of the main body of the cleaning body and the outside of the floor, so that the distance between the center and the wheel axle is close. By using a small lifting force, the cleaning main body can be raised on the floor surface, thereby reducing the burden on the back of the arm or hand when cleaning in the standing state.

In addition, when the cleaning main body is placed on the floor surface, there is no fear that the rear end surface and the like collide with the floor surface and thus do not damage the floor surface.

[2] Since the outer diameter of the main wheel is 50% or more of the total length of the cleaning body, the center of the cleaning body should be automatically positioned within the outer circumference of the main wheel without considering the position of the center. Can be.

[3] When the cleaning primitive was built, its center was passed through the wheel axle so that it was at the top surface of the line perpendicular to the floor surface. Therefore, when the cleaning primitive was used upright, it was stable and could be stored in a small space.

[4] The support member is provided on the rear end of the cleaning main body so that the position of the center and the wheel axle in the upright position can be adjusted so that the cleaning main body can be installed even when the center is down or when dust is accumulated in the dust collecting chamber. It can make a stable.

In addition, even when the center position is shifted due to the change of the specifications of the parts contained in the cleaning body during the development of the cleaning body, by attaching the supporting member or changing its position or height without modifying the rear end surface of the cleaning body. Because it can cope, it can continue development as it is. For this reason, development can be terminated early with little cost.

[5] Since the center of the cleaning body is located in front of the wheel axle and on the top surface, the cleaning body can be placed on the floor with very little force, thereby reducing the burden on the hands and arms. In addition, it can be carried in a balanced manner when moving the upper handle.

[6] Since the center of the blower motor and the electric wire winding unit built in the cleaning main body are located in front of the wheel axle and the top surface within the outer circumference of the wheel axle, the center of the cleaning main body can be located in front of and above the wheel axle. have.

For this reason, this invention can be implement | achieved with a simple structure.

[7] Since the distance from the wheel axle to the front wheel is approximately twice the distance from the wheel axle to the center, the cleaning primitive can be rotated with a small force and a small radius of rotation, and there is no fear of falling when turning.

Claims (7)

A dust collector, a blower motor, etc., which includes a cleaning main body having a front wheel and a pair of main wheels and a hose connected to the cleaning main body, and moves the cleaning main body to suck dust on the floor surface. The vacuum cleaner of claim 1, wherein a center of the main cleaning body is located in the outer circumference of the main wheel, and a part of the outer circumference of the main wheel is outside the rear end and the bottom of the main cleaning body. The electric vacuum cleaner according to claim 1, wherein the outer diameter of the main wheel is at least 50% of the total length of the cleaning body. The electric vacuum cleaner according to claim 1, wherein the center of the cleaning main body passes through the wheel axis of the main wheel and is on the top surface side of the line perpendicular to the floor surface with the cleaning main body placed on the floor surface. The vacuum cleaner according to claim 1, wherein a support member is provided on a top surface side of a line connecting the wheel shaft and the center of the rear end surface of the cleaning main body. The electric vacuum cleaner according to claim 1, wherein the center of the cleaning main body is in front of the wheel shaft and on the top surface side. The electric vacuum cleaner according to claim 1, wherein the centers of the blower motor and the electric wire winding unit built in the cleaning main body are respectively located in the outer circumference of the main wheel, and the front side and the top surface side of the main wheel. The vacuum cleaner according to claim 1, wherein the distance from the wheel axle to the front wheel of the main wheel is approximately twice the distance from the wheel axle to the center.