JPH0284919A - Sucking nozzle for electric cleaner - Google Patents

Abstract

PURPOSE:To attain floor cleaning to be easily handled by automatically turning a floor nozzle when the floor nozzle collides with an obstacle and recovering this turning to an original position when the floor nozzle is separated from the obstacle. CONSTITUTION:A nodal cam 14 is provided in a floor nozzle 10 side and a nodal spring 16 is provided in a sucking tube 12 side. The nodal cam 14 is shaped almost cylindrically and in an upper side, four cams, which are inclining surfaces in a tube axis direction, are formed on the end face of the tube. For the nodal spring 16 of the sucking tube 12, V-shaped spring 16a and 16b are engaged with triangle recessing grooves 14a and 14b of the cam 14 and the both the spring and groove keep a stational condition that the V-shaped spring is engaged with the triangle recessing groove by prescribed holding force with the energizing force of the spring 16. When the floor nozzle 10 collides with the obstacle and collision force is a prescribed value, the cam 14 deforms the spring 16 and the floor nozzle 10 can be turned to the sucking tube 12. When the obstacle and floor nozzle 10 are separated, an initial position is recovered again by the return energizing force of the spring 16.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a suction nozzle for a vacuum cleaner, particularly to an improvement of a suction nozzle having a floor nozzle for cleaning a relatively large area of the floor. .

[Prior Art] Vacuum cleaners that use a vacuum suction function are well known for general household or commercial use, and these vacuum cleaners are provided with various nozzles depending on their uses.

Usually, floor cleaning has the largest cleaning area in household indoor cleaning, and in order to be suitable for cleaning such a large area, a floor nozzle with a wide suction port is used and is connected to a vacuum pump. A floor nozzle is provided at the tip of the suction tube.

In such a suction nozzle, the suction tube and the floor nozzle are rotatable in order to minimize the user's effort. The tube is oriented such that its angle can be varied in the vertical direction, allowing the user to adapt the floor nozzle to the required cleaning surface by raising or laying down the suction tube.

[Problems to be Solved by the Invention] However, in such conventional devices, the floor nozzle is fixed horizontally to the suction pipe, so when actually cleaning the floor, the floor nozzle However, when the nozzle collides with a chair leg or furniture, the smooth movement of the nozzle is obstructed by these obstacles, making it extremely difficult to clean the floor.

In addition, a collision with the above-mentioned obstacles may cause damage to the floor nozzle itself or furniture, etc., and conventionally, the user has to move the floor nozzle while considering collisions with such obstacles. There was a problem.

In particular, in narrow rooms or rooms with a lot of furniture, collisions between the above-mentioned obstacles and the floor nozzle often occur, and it is difficult to clean narrow floors with a wide floor nozzle. There were drawbacks.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to orient the floor nozzle in a direction substantially perpendicular to the suction pipe so that the floor nozzle works most effectively during normal floor cleaning. During cleaning, when the floor nozzle collides with an obstacle, the floor nozzle automatically rotates with a collision force greater than a predetermined value, and when the floor nozzle leaves the obstacle, this rotation returns to its original position. An object of the present invention is to provide an improved suction nozzle that is easy to handle and capable of cleaning floors.

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a floor nozzle that is rotatably provided in a horizontal direction at the tip of a suction tube, and the suction tube and the floor nozzle are connected to each other. A moderation cam is provided on one side of the rotating part, and a moderation body is provided on the other side, and the moderation cam and the moderation body engage in a biased state, so that the floor nozzle does not interfere with the suction pipe. Even if the floor nozzle rotates upon contact with an object, the floor nozzle is immediately returned to a predetermined moderation position by the biasing force of the moderation body as soon as the floor nozzle leaves the obstacle.

[Function] Therefore, according to the present invention, when cleaning the floor on a normal plane where there is little resistance to the floor nozzle when sliding on the floor, the floor nozzle is positioned perpendicularly to the suction pipe by its moderation biasing force. This normal angle can be ensured when sliding the floor nozzle smoothly against the floor.

When the floor nozzle collides with an obstacle such as a desk, chair leg, or furniture, if this collision force exceeds a predetermined value, the floor nozzle will automatically rotate horizontally with respect to the suction pipe. This has the advantage that an excessive collision with an obstacle can be avoided and damage to both can be prevented, and that unreasonable force is not applied to the user's operating force.

Then, when the floor nozzle leaves the obstacle, the floor nozzle immediately returns to its original position due to its moderation recovery force, and can maintain the same original floor nozzle position again.

Of course, in the present invention, by providing a plurality of moderation positions, it is possible to select a plurality of holding positions for the floor nozzle and the suction tube, thereby making it possible to easily guide the floor nozzle into narrow areas. becomes possible.

[Example] Preferred embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a first embodiment of a suction nozzle according to the present invention, and the suction nozzle is composed of a floor nozzle 10 and a suction pipe 12. As shown in FIG.

As is well known, the floor nozzle 10 is moved along the floor surface 100 to form a wide nozzle orthogonal to the suction tube 12 as shown in FIG. Become. In the figure, the brushes, rollers, suction grooves, etc. provided inside the floor nozzle 10 are the same as conventional ones and are not related to the subject matter of the present invention, so a detailed explanation will be omitted.

A characteristic feature of the present invention is that the floor nozzle 10 and the suction pipe 12 are configured so that the floor nozzle 10 can be rotated horizontally with respect to the suction pipe 12. In this embodiment, a moderation cam 14 is provided on the floor nozzle 10 side of the rotating portion between the two, while a moderation spring 16 forming a moderation body is provided on the suction pipe 12 side.

The moderation cam 14 may be molded integrally with the floor nozzle 10 from plastic or the like, or, as in the embodiment, the moderation cam 14 is processed separately from the floor nozzle 10 and fixed together when the two are assembled. It's also good.

The moderation cam 14 has a substantially cylindrical shape, and on one side of the moderation cam 14, which is the upper side in FIG. It is formed.

That is, in FIG. 1, two cams on one side of the floor nozzle 10 are shown, and each of these cams has two triangular concave holes.
cams 14a and 14b are formed.

On the other hand, the moderation spring 16 is attached to the suction pipe 12 as described above.
is fixed, and in the embodiment, this moderation spring 16
Four figure-7 springs 16a and 16b are arranged on the circumference of the ring-shaped leaf spring so that the outer circumference of the ring-shaped leaf spring engages with the four cam surfaces (14a and 14b) of the moderation cam 14 in a biased state. is forming.

Therefore, as is clear from FIG. 1, the 7-shaped springs 16a and 16b of the moderation spring 16 of the suction tube 12 engage with the triangular grooves 14a and 14b of the moderation cam 14, and at this time, the biasing force of the moderation spring 16 Both maintain a stable state in which the V-shaped spring engages with the triangular groove as shown in the figure with a predetermined holding force.

As is clear from FIG. 1, when the floor nozzle 10 collides with an obstacle and the collision force is greater than a predetermined value, the moderation cam 14 deforms the moderation spring 16 so that it does not move against the suction pipe 12. The floor nozzle 10 is made rotatable, and when the obstacle and the floor nozzle 10 are separated, the return biasing force of the moderation spring 16 makes it possible to achieve the initial position again.

FIG. 2 shows a floor nozzle 1 for a suction pipe 12 according to the present invention.
0, and the floor nozzle 10 moves in the direction of arrow A in the normal state where the floor nozzle 10 is held at a position substantially perpendicular to the suction pipe 12 as shown by the solid line. Suppose then.

At this time, the left wing of the floor nozzle 10 collides with the obstacle 200. Conventionally, when such a collision occurs, the floor nozzle 10 is returned to its original position and its course is shifted as shown by the chain line B. The floor nozzle 10 must be moved to a position where it does not come into contact with the obstacle 200, and then the floor nozzle 10 must be moved forward again.

On the other hand, according to the present invention, as described above, the floor nozzle 10 is rotatable with respect to the suction pipe 12.
rotates itself, and while moving the floor nozzle 10 forward only in the direction of arrow A, it is possible to effectively avoid the floor nozzle 10 from the obstacle 200 and continue cleaning, and the user can move the floor nozzle 10 back. This makes it possible to extremely easily clean a floor surface with obstacles without having to do so.

Furthermore, when the floor nozzle 10 separates from the obstacle 200, the floor nozzle 10 is moved to the nearest moderation position determined at that time.
returns automatically, and for example, in Fig. 2, the floor nozzle 1
0 settles at a position that is in line with the suction tube 12, that is, a position displaced by 90'' with respect to the initial position.

Therefore, according to this embodiment, the floor nozzle 10 is approximately 45"
When it rotates, it will drop to the next moderation position, for example 90'' position.
In the rotation range within this range, the floor nozzle 10 returns to the orthogonal direction with respect to the original suction pipe 12 when it leaves the obstacle.

As shown in Figure 2, moving to the 90m position is equivalent to using a narrow nozzle to clean the narrow floor beyond the obstacle 200 without changing the nozzle. , it becomes possible to perform actual cleaning work easily.

Of course, the floor nozzle 10 displaced by 90a can be rotated to any desired position by contacting the nozzle blade on one side with a leg or other obstacle, and the desired position can be selected by the user. It is.

FIG. 3 shows the moderation spring 1 in the embodiment of the present invention described above.
6 is shown in a plan view, and the moderation springs 16 are four V-shaped springs 16a that are symmetrical in order to obtain four different moderation positions.

16b, 16c, and 16d.

The moderation spring 16 has a ring portion 16e provided on the inner circumferential side thereof, and the moderation spring 16 has a ring portion 16e provided on the inner circumference side.
0@4 tongue pieces 16f, 16g, 16h from different directions
, 16i are integrally formed so as to protrude from the outer periphery, and the aforementioned four V-shaped springs 16a, 16b, 16c, and IE+d are formed by extending from these four tongue pieces 16f to 16i.

As is clear from the above-mentioned FIG. 1, each figure 7 spring 16a
16d is formed in a V-shape bent in a direction perpendicular to the plane of the paper in FIG. It is possible to apply a biasing force to do this.

Furthermore, this moderation spring 16 has key grooves 6j, 1 on its inner circumferential side.
6, 161.16 m is provided, and four keys 12a, 12b, 12c, 12d provided on the outer periphery of the suction tube 12.
It is understood that the moderating spring 16 is non-rotatably coupled to the suction tube 12 by engaging with the suction tube 12 . The moderation spring 16 having the above shape is preferably formed by punching from an elastic metal plate, and can also be formed by injection molding of elastic plastic.

As described above, according to the first embodiment of the present invention, the moderation spring 16 fixed to the suction pipe 12 and the moderation cam 14 fixed to the floor nozzle 10 form a rotating part, and the floor nozzle 10
can be freely rotated while maintaining a predetermined moderation position with respect to the suction tube 12, and thereby, when the floor nozzle 10 collides with an obstacle on the floor, the position can be freely rotated. This has the advantage that it is possible to move around the floor while avoiding obstacles, making it extremely easy to clean the floor.

Further, in this embodiment, the moderation cam 14 and the moderation spring 1
6 is covered by a guide tube 18, which prevents dust from entering from the outside into the rotating part of the floor nozzle 10 and suction tube 12, and also positions and holds the moderation spring 16 in a predetermined position. It is useful for

FIG. 4 shows a second embodiment of the present invention, in which a moderation cam 114 is fixed on the suction pipe 112 side, and a moderation body is formed on the nozzle 110 side. A spring 116 is fixed.

As is clear from FIG. 4, the suction pipe 112 is integrally provided with a square moderation cam 114 having a drum body.

The spring receiver provided on the floor nozzle 110 is a cylinder 120.
The apex angle of the moderation cam 114 slides on the inner circumference of the suction pipe 1.
12 and a floor nozzle 110 are rotatably provided.

In the spring receiver, two sets of moderation springs 116 are fixed inside the tube 120, and each moderation spring 116 is provided with a pair of spring parts. , 116d.

In the embodiment, the spring receivers of these moderation springs 116 are firmly fixed to the inner periphery of the tube 120 by gluing, fitting, rivets, etc., and are in contact with the outer periphery of the moderation cam 114 with a predetermined biasing force.

Therefore, also in this second embodiment, the suction pipe 112 and the floor nozzle 110 are fixedly held in the illustrated biased position, and can be used for normal cleaning operations in this state.

When the floor nozzle 110 makes contact, the moderation cam 114 rotates against the biasing force of the moderation spring 116 depending on the direction of the contact, thereby making it possible to avoid the obstacle.

Therefore, in this embodiment as well, it is necessary to prevent the floor nozzle 110 from colliding with an obstacle with a strong impact force, to prevent damage to furniture and other objects, and to move the suction cylinder 116 to a position where it avoids the obstacle each time there is a collision. This has the advantage that cleaning is extremely easy.

Also in this embodiment, when the floor nozzle 110 moves away from an obstacle, it can easily return to the original moderation position.
It is now possible to continue cleaning work.

According to the embodiment described above, there are four moderation positions around the suction cylinder.
Although the moderation positions can be selected every 90'', these moderation positions can be set arbitrarily in the present invention.

5 and 6 show a third embodiment of the present invention, in which a moderation cam is provided on the suction pipe side, and a moderation body consisting of a spring-loaded moderation ball is provided on the floor nozzle side. It is provided.

That is, in the embodiment, moderation cams 214 as shown in detail in FIG. moderation cams 214 are arranged at equal intervals.

In addition, in the embodiment, a split groove portion 220 is also integrally formed at the tip of the suction tube 212 in order to rotatably engage with a floor nozzle to be described later. Four split grooves 220a and flange portion 22
0b.

On the other hand, a hollow part 210a is formed in the floor nozzle 210 to receive the split groove part 220, and four ball receiving holes 210b are provided around the hollow part 210a.

A biasing spring 222 is inserted into each hole 210b of the ball receiver, and a moderation ball 216 constituting the moderation body of the present invention is arranged at the tip of each spring 222, as shown in FIG. Each moderation ball 216 connects the moderation cam 214 of the suction tube 212 and the floor nozzle 2.
A biasing spring 222 is installed in a compressed state between the housing 10 and the housing 10 .

Therefore, each moderation cam 214 has a biasing spring 2
22, and in a normal state, as schematically shown in FIG.
The moderation position of the suction pipe 212 and the floor nozzle 210 is determined with each moderation ball 216 in contact with the trough of the moderation cam 214.

When the floor nozzle 210 collides with an obstacle in this state, the floor nozzle 210 moves with respect to the suction pipe 212 so that each moderation ball 216 rides on the peak of the moderation cam 214, and as a result, each of the embodiments described above Similarly, the floor nozzle 210 can be rotated in the horizontal direction with respect to the suction pipe 212, making it possible to easily move the floor nozzle 210 while avoiding obstacles.

Similarly to the embodiment described above, in the third embodiment, when the floor nozzle 210 leaves the obstacle, the moderation cam 2 is activated again.
14 and the moderation ball 216, the normal moderation position can be returned.

[Effects of the Invention] As explained above, according to the present invention, the floor nozzle for cleaning the floor surface is rotatable in the horizontal direction with respect to the suction tube,
Furthermore, since the position is determined by a moderation mechanism, a predetermined moderation position is always selected by the spring force of this moderation mechanism, and even when the floor nozzle rotates, the position can always be returned to the desired moderation position. This has the advantage of making cleaning work extremely easy.

[Brief explanation of drawings]

Fig. 1 is an external view showing a preferred first embodiment of the suction nozzle for an electric vacuum cleaner according to the present invention; Fig. 2 is an explanatory view showing the action of the suction nozzle of Fig. 1 during cleaning work; Fig. 3; is an enlarged plan view showing the details of the moderation spring in the first embodiment, FIG. 4 is an explanatory view of the main part showing the second embodiment of the present invention, and FIG. 5 is a suction tube and the third embodiment of the present invention. FIG. 6 is a partially cutaway perspective view showing a state in which the floor nozzle is disassembled, and FIG. 6 is a sectional view of a main part schematically showing the moderation mechanism in an assembled state of the third embodiment. 10.110.210 ... floor nozzle 12.11
2.212 ... Suction pipe 14.114, 214
... Moderation Cam 16.116 ... Moderation Spring 216 ... Moderation Ball Applicant Orient Nistate Agent Patent Attorney Yoshi 1) Kenji [8-751200: Zenman Tsuba Diagram 2 Diagram

Claims (1)

[Claims] The suction tube includes a floor nozzle that is rotatably provided at the tip of the suction tube in a horizontal direction, and a moderation cam is provided on either one of the rotating parts of the suction tube and the floor nozzle. and a moderation body is provided on the other side, and the moderation cam and the moderation body are engaged in a biased state, so that even if the floor nozzle rotates with respect to the suction pipe when it comes into contact with an obstacle, the floor nozzle will not be obstructed. A suction nozzle for a vacuum cleaner, characterized in that the floor nozzle returns to a predetermined moderation position by the biasing force of a moderation body immediately after detaching from an object.