JP2002272658A - Vacuum cleaner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problems with a vacuum cleaner, that when the lower limit of tilting of a handle is provided near the lower limit of the normal range of tilt angles for cleaning in order to float up the front edge of a head to suck large sizes of dust, a space of low height, such as a space under a bed, cannot be cleaned as the handle cannot enter the space, that if the lower limit is provided near the horizontal, the front edge of the head cannot be floated up, that a long handle cannot be turned down horizontally when in a small space, and that a rotary brush or the like occupies a suction opening in the lower surface of the head, making it impossible to suck large sizes of dust. SOLUTION: The lower limit of the tilting motion of a handle is elastically locked, for example. Large sizes of dust are sucked by a head lift in a locked condition, and the head is stepped on and tilted further downwards to allow the head to escape from the elastic lock and enable the handle to be tilted downward to near the horizontal so as to enable even a space of low height to be cleaned. The rear of the handle is made bendable upwards at its middle so that even a small space of low height can be cleaned by making only the front part of the handle horizontal. A large-size dust suction chamber is provided near a head suction pipe and away from the position of the rotary brush to create a large opening in the lower surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention Vacuum cleaners of the suction or reflux type, comprising a cleaning head and a fan motor, a dust collecting chamber (filter type, cyclone type, impact type, electrostatic type, etc.).
A crawl type in which the main body is provided on the floor together with the head, an upright type in which the main body is provided in the handle,
The cleaning head belongs to the technical field of all vacuum cleaners such as canisters in which a cleaning head is connected to a handle also serving as a suction tube, and a tip thereof is connected to a main body separately provided by a flexible hose. In particular, it relates to the relative tilting of the head portion including the cleaning head and the handle portion including the handle, and relates to a front lifting method of a large dust suction head and a cleaning method of a low space such as under a shelf.

[0002]

2. Description of the Related Art The cleaning head and the handle are usually connected by a tilt shaft so that the handle can be tilted up and down. FIG. 7 shows an example of a conventional tilting mechanism in which a canister serving as a handle and a suction pipe is of an upright type. 3
1 is a communication pipe to the head, and 32 is a handle also serving as a suction pipe. Reference numeral 30 denotes a tilting mechanism. This usually people standing angle range handles specific to scan back and forth head by hand when cleaning with theta _H through? _{L (hereinafter} referred to as normal tilt angle)
It is necessary to be able to tilt freely. 2. It has also been common practice to tilt to its center of gravity upwardly theta _V beyond the normal tilt angle of the handle portion for during storage without temporarily clean stop or use are to precede the tilting axis. It is also known to provide a mechanism for rotating the head left and right as necessary.

[0003] 3. The cleaning head usually has a lower end extending close to the floor in order to efficiently clean dust and the like, and a gap between the cleaning head and the floor is minute. In a carpet or the like, the lower end of the front wall is brought into contact with the carpet or cut into the carpet. For this reason, tall garbage such as soybeans and rice, and rounded paper waste cannot pass through the gap and cannot be sucked by the head. Also, it is impossible to push over the head to overcome obstacles such as a threshold. In a canister, the head and the suction tube / handle are lightweight, so they can be easily lifted. However, in a crawl type or an upright type, there is a problem in that the head or handle is heavy and the head is lifted. For this purpose, there is disclosed a structure in which a lower limit is provided for the tilt angle of the handle, and a front portion of the head is lifted when the handle is tilted down below the lower limit. A portion of the part and the handle portion of the head portion 7 forms a lower angle theta _L contacts 100. The present inventor has also proposed a tilt lock mechanism that operates with a finger or a gripping operation at a handle at an arbitrary tilt angle.

[0004] 4. Desk and under cabinet on the one hand can not be inserted all the way from a cleaning space height low when in the cleaning space there is a lower limit theta _L the tilting angle of the handle portion handle servant head lower height, such as under the bed. Products handle for this can lower inclined to the horizontal vicinity theta ₀ there.

[0005] 5. For cleaning a carpet, cleaning reinforcement means such as a rotating brush, a vibrating tapping mechanism, a comb tooth, a combing mechanism such as a sub-nozzle, a hair separation mechanism, and a recirculation fume mechanism have been proposed.
Usually, these means cover the lower surface cleaning opening of the cleaning head which is long to the left and right and narrow in the front and rear, and is installed almost completely in the cleaning space in the head. This is due to eliminating unnecessary space in order to maintain a high internal flow rate.

[0006]

[Problems to be Solved by the Invention] 3 of the prior art
Terms and 4 contradict. In other words, the limitation of the downward inclination of the handle for the head lift for sucking large dust and the downward inclination of the handle to the horizontal level for cleaning the low space are incompatible.

[0007] 2. If the handle is tilted down horizontally to clean a low-height space, the long handle will extend horizontally.If there is a wall or an object in front of the low-height space, the long handle will be caught and cannot be put in the middle. Cannot clean high spaces. In the case of a structure in which a plurality of short handles are connected to form a long handle, reducing the number of connections can shorten the handle, but it is troublesome to perform during cleaning. 3. The above items 3 and 5 of the prior art are inconsistent. In other words, the cleaning reinforcement means almost covers the opening of the cleaning head and cannot suck large-sized dust. As a solution to this problem, the rotating brush is divided into two parts left and right, and the recirculation / spouting mechanism is divided into two parts left and right to provide an empty pre-vacuum space in the center of the head to which the suction pipe is connected, and to suck large-sized dust from that space Means for doing so have been proposed by the present inventors. However, this complicates the head structure, and inadequately cleans the carpet in the center, so that the front-rear scanning must be performed by shifting the scanning left and right.

[0008]

[Means for Solving the Problems] (Means 1) At least a head portion having a cleaning head and a handle portion having at least a handle for a cleaner to scan the cleaning portion in an upright position are provided. Electric cleaning provided with a fan motor and / or a dust collection chamber in the head part in the mold, in the handle part in the upright type) or independently (the canister type is this type, in which case the handle also serves as a suction pipe) In the machine, the head portion and the handle portion are coupled by a tilt shaft so that the handle portion can be vertically tilted, and the tilt angle is configured as follows. 1. At least one elastic stop (click stop) near or below the lower limit of the handle tilt angle range necessary for normal floor cleaning (hereinafter referred to as the normal tilt angle).
Alternatively, a magnetic contract is provided. 2. The resistance to falling out of the contract by further tilting the handle after entering the contract with the handle down (hereinafter referred to as the contract strength)
Is the strength of the contact that requires fixing assistance such as stepping on the head with the foot, etc.If the head is tilted down without fixing assistance, the head is supported by the rear floor contact point or rear wheel while tilting is stopped. At least the front part is configured to float. 3. After the engagement has escaped downward with the help of the fixing, the handle can be tilted almost horizontally.

According to this means, the head is tilted downward at the time of elastic engagement (click stop), and a head lift for sucking large-sized dust is made possible. When the handle is further stepped down beyond the click stop and the handle is tilted downward, the handle becomes horizontal. Can be tilted up to clean low and high spaces. Problem 1 is solved.

(Means 2) At least one of a head portion having a cleaning head and a handle portion having a handle for allowing a cleaner to scan the cleaning portion in an upright position is provided. In the case of the upright type, the head unit and the independent unit (the canister type is this type, in which case the handle also functions as a suction pipe) in a vacuum cleaner provided with a fan motor and / or a dust collecting chamber. The handle portion is coupled to the handle portion by a tilt shaft so as to be tiltable up and down, and the tilt angle is configured as described below. 1. At least one fixed stop means is provided near or below a lower limit of a handle tilt angle range (hereinafter, referred to as a normal tilt angle) required in a normal floor surface cleaning state and capable of canceling the downward tilt prohibition to a lower angle. When the head is further tilted downward at the contact angle, at least the front portion of the head is lifted up using the rear floor contact point or the rear wheel as a fulcrum. 2. When the fixed engagement means is released by being operated, the handle portion can be tilted downward, and the handle can be tilted almost to near the horizontal.

According to this means, the handle can be tilted downward at the time of the fixed engagement to perform a head lift for sucking large refuse, and when the fixed engagement is released and the handle is tilted downward, the handle can be tilted to a horizontal position. Can clean high spaces. Problem 1 is solved.

(Means 3) At least one of a head portion having a cleaning head and a handle portion having a handle for allowing the cleaner to scan the cleaning unit in an upright position is provided. In the case of the upright type, the head unit and the independent unit (the canister type is this type, in which case the handle also functions as a suction pipe) in a vacuum cleaner provided with a fan motor and / or a dust collecting chamber. The handle portion is coupled to the handle portion by a tilt shaft so as to be tiltable up and down, and the tilt angle is configured as described below. 1. At least one fixed engagement means is provided at or near a lower limit of or below a lower limit of a handle tilt angle range (hereinafter referred to as a normal tilt angle) required in a normal floor cleaning state, and the lower tilt prohibition cannot be released. When the head is further tilted down at this contact angle, at least the front portion of the head is lifted up with the rear floor contact point or the rear wheel as a fulcrum. 2. A joint is provided on the head side and / or the handle side near the tilting axis such that the handle can be tiltably tilted, and the joint is normally an elastic engagement means, a magnetic force engagement means, or a fixed engagement which can be released by a human operation during cleaning. If the handle is tilted down beyond the angle of engagement, and is fixed and assisted by stepping on the head, etc., the joint loses elasticity or magnetic force, When the fixed engagement is released, the vehicle can be bent and the handle can be tilted down to near the horizontal.

According to this means, when the handle is further tilted downward beyond the fixed contact angle, the head is lifted to suck large-size dust, and when the handle is further tilted down by stepping on the head, the head or the tilting axis of the handle is rotated. When the bent part of the elastic part is elastic, the elastic part is released.In the case of the fixed part, the fixed part is released and bent, and the handle can be lowered to near the horizontal, cleaning low and high spaces. You can do it. Problem 1 is solved.

(Means 4) A crawl type or canister type vacuum cleaner is provided with the following means. At least one joint that can be bent upward is provided at a position separated by a specific length from the tilt axis of the handle (which also functions as a suction tube in the case of the canister type), and the handle is divided into upper (rear) and lower (front). Normally, the handle is held almost fixed by elastic contact means, magnetic force contact means or fixed contact means which can be released by operation, but it is fixed by holding the head part or the lower part of the handle by hand or stepping on the foot If the upper part of the handle is assisted and the upper part of the handle is tilted and the elastic or magnetic force is released or the fixed part is released, the joint can be bent and the upper (rear) part is higher than the lower part (front) part. Means that can be tilted.

According to this means, in the case of the crawl type or the canister type, the long handle portion can be bent upward in the middle if necessary, so that even if the front of the low and high space is close to a wall or the like and narrow, it is close to horizontal. The lower part of the handle of the specific length thus entered goes into the lower part of the low / high space, and the upper part of the remaining handle can be bent vertically, for example, to enter a narrow place, thus solving the problem 2.

(Means 5) In an upright type vacuum cleaner, the following means are provided. A fixed and straight suction tube of a specific length extending from the tilt axis with the head is provided, and an extended bendable joint is provided ahead of the fixed suction tube to form a combined extended suction tube body. The tube is contained in a jacketed straight tube that communicates with the suction pressure of the main body (the dust collection chamber / fan motor) so as to be movable in the axial direction and is not bendable. If the head is fixed with feet or the like and the main body is lifted, the outer straight tube is moved upward to expose the joint of the extended suction tube, the joint is bendable, and the main body and its handle are appropriately positioned with respect to the extended suction tube. Means that can be angled.

According to this means, in the upright type, problem 2 is solved because the suction pipe of a specific length which is close to horizontal enters deep inside the low and high space, and the remaining main body can be held almost vertically, for example. In addition, since the entrance to the low and high space is a head and a suction tube, the drawback of the conventional upright type having a large main body can be solved.

(Means 6) In a vacuum cleaner provided with a cleaning reinforcing means such as a rotary brush, a tapping mechanism, a combing mechanism, and a hair separation mechanism in a cleaning chamber of a suction or reflux cleaning head, the following means are provided. Means for providing a large-size dust suction chamber having an opening having a size substantially similar to the cross-section of the suction pipe on the lower surface on the suction pipe side of the connection portion between the cleaning head cleaning chamber and the suction pipe.

According to this means, for example, even when the cleaning opening of the head, which is long in the left and right direction and is narrow in the front and back, is almost exclusively occupied by the internal cleaning reinforcing means, for example, the lower surface is located near the cleaning space opening of the suction pipe at the substantially right and left center. Since a suction chamber having an opening having an area and a shape approximately equal to the cross section of the suction pipe is newly added, large-sized dust can be sucked from the suction chamber.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the definitions of the terms used in the claims and the solution will be explained. Elastic engagement: a means usually called a click stop corresponds to this. A force f that elastically hinders movement at a specific relative position is actuated between two objects moving linearly or circumferentially, sliding or apart but moving in parallel to each other. A mechanism is provided, and at that position, the two cannot move with a force lower than f, but with a force higher than f, the engagement is released due to elasticity, and the mechanism becomes movable.

FIG. 1 will be described in detail. 1A of FIG. 1
1, R1 is two objects that fold or move close to each other. Now, S1 is stopped and R1 can move up and down. The same is true for the opposite case. S has a V-shaped hole or groove 3, and R has a ball or roller 5 urged in the direction of being pushed out by a spring 6. The position of this ball is defined as point k.

When the point k of R is moved downward from the upper side, there is no movement resistance other than friction in the flat portion of S, so the resistance is set to zero resistance. When the k-point reaches and enters the V-hole, the inclined surface of the V is lowered to the bottom by the pressing force of the spring. Therefore, as shown in FIG. That is, V
Is contracted. Here, f is the resistance to movement. When the V is further moved, the inclined surface of V rises from the bottom against the spring, so that a spring component in the moving direction is received as a resistance force f.

FIG. 1A shows a case where k moves from top to bottom as a function of the movement resistance (f: horizontal axis) as a function of the k position (θ: vertical axis). The case where k moves from bottom to top is shown in FIG. That is, R1 does not move with a moving force lower than f, but when it receives a force larger than f, it escapes from the contact point and becomes movable.

FIG. 1B shows an example in which a sliding piece 7 is used instead of a ball or a roller, and FIG. 1C shows an example in which a leaf spring 8 is used. It goes without saying that the ball and the V-groove may be provided as shown in FIG. 1D.

The output from the trigger point can be asymmetrical in the vertical direction. FIG. 1E shows a specific example of the structure. That is, V
The upward slope of the groove is gentle and the downward slope is steep. For this reason, the component force f in the moving direction of the spring is asymmetric and has a low value at a gentle inclination, so that when the k point moves from the top to the bottom, first, as shown in FIG. The contract is reached, and a large force is required to escape further downward. Conversely, when the k point moves from bottom to top, FIG.
As shown by u, a contract is firstly received by receiving a large drop force, and a low output is sufficient to escape further upward.

Fixed engagement: A force that hinders movement at a specific relative position acts between two objects that are linearly or circumferentially slid or move apart but move in parallel. A mechanism that can be moved and cannot move any more unless it is destroyed by a larger force. Details are shown in FIG. FIG. 2A has a fixed trigger mechanism that cannot be released. 21 range θ _H 〜
In the range α of θ _L , the ball k can move freely up and down, but the upper and lower ends of 21 are horizontal, and the ball 5 cannot move beyond this and is fixedly stopped. Attempts to move with greater force are accompanied by destruction.

Releasable fixed contract: A fixed contract that can be released by operation, although it is a fixed contract. 2B and 2C in FIG. 2 are examples of fixed contracts that can be released. FIG. 2B
In the figure, reference numeral 22 denotes a trigger in a release state. The head 24 is pressed against the hole of the release mechanism 23 by a spring.
For this reason, the stopper 22 at the end does not enter the inside of S6 and does not hinder the vertical movement of the ball. That is, the contract is released. If 23 is pulled up, head 24 is depressed and its tip 2
Since 2 protrudes, the ball cannot move beyond 22.
That is, a fixed contract is made.

In this case, it can be easily understood that the contract can be released by pressing the upper portion of the device 23 downward with a foot or the like. To return from the released state to the contracted state with your foot
It can also be easily understood that it is possible to provide a mechanism in which the reference numeral 3 is connected to a seesaw mechanism (not shown) and the other end of the seesaw is pushed by a foot to move the reference numeral 23 upward.

FIG. 2C shows another example which can be released. 2
Reference numeral 6 denotes a locking member having a knob, which is fixed when pressed down, and released when pulled out. The figure shows the released state in which the knob is pulled out. Reference numeral 27 denotes a spring which can be held at any position by a click stop by a groove provided in the spring 26.

Magnetic Attachment: Instead of the spring force of the above-mentioned elastic engagement mechanism, a mutual attractive force between a permanent magnet or an electromagnet and a magnetic material such as an iron piece can be used. It is evident from the fact that both elastic and magnetic closures are found in the market for closing doors with double doors.

Embodiment 1 In the conventional tilting mechanism shown in FIG. 10, the above-mentioned various locking mechanisms can be provided on the mutual cylindrical slidable surface, near the outer peripheral portion of the cylindrical end face on the side surface, and the like. Further, a new engagement mechanism can be provided on the outer surface of the cylinder. For example, it is easy to provide a long arc-shaped arm protruding from the handle and to form a locking mechanism between the tip and the outer surface of the head cylinder.

The elastic contract of the means 1 is shown by 1A, 1B, 1 in FIG.
Use contracting means indicated by C, 1D, 1E, or equivalent means
Yes. The relationship between the tilt angle and the contact angle is described using 1F in FIG.
explain. Hands used for normal floor cleaning etc.
Usual tilt angle range α = θ _H―Θ_L, Is the flat of S4
It is formed at the lower part of the recess 9, and the recess 9 extends further upward,
Handle is upper limit θ_HSlightly beyond vertical, for example
Θ such as 95 degrees_VCan be tilted up to the fixed
Used for pipes.

The lower limit angle θ _L is constituted by a steeply inclined V-slope 10 serving as an elastic stopping means. The engagement force f at the time of the downward tilt is shown in FIG. 1Fd. The magnitude of f is designed so that the moment about the rotation reference point such as the rear wheel of the head or the rear contact point of the head (not shown) is larger than the moment about the same rotation reference point of the head weight at the center of gravity of the head. That is, the engagement force f can be arbitrarily set by the inclination 10 and the strength of the spring.

Here, when R1 is further tilted downward, the head rotates around the rotation reference point and the tip of the head rises, and large dust can be sucked into the head. In addition, a high step such as a threshold can be overcome without lifting by simply pushing the head with a floating tip forward.

[0035] If further descended flat lower limit theta _L beyond the handle when the handle is tilted at least strength f and escaped the tilting contract stop angle downward by the elasticity of the spring gentle slope 11 stepped on the head by a foot or the like It passes through the part 12 becomes tiltable up to a fixed contract stop angle theta ₀ in.

The lower fixing agreement stop angle theta ₀ is the handle portion need not necessarily be provided that may be tilted until it hits the floor of course. However, it is preferable that the head portion when lifting the handle portion is provided with a fixed lowermost limit tilt angle theta ₀ because it is inconvenient to handle loosely hanging downward about the tilt axis in this state.

Conversely, when the handle is tilted upward and returned, the engagement force f is low due to the gentle inclination 11 as shown in FIG. 1Fu, and the steering wheel can return to the normal tilt angle range without stepping on the head.

Embodiment 2 It is needless to say that the elastic contract of Embodiment 1 may be a fixed releasable releasable. That is, this is the case of the means 2. In this case, however, it is necessary to release or re-fix the contract, such as stepping on 23 or pulling or pushing 26 at the contract point.

Embodiment 3 In Embodiment 2, if there is no fixed disengagement mechanism, the handle cannot be lowered below the engagement angle. In this case, means 3 for providing a joint that can be bent downward on the head portion side or the handle portion side can be used.

FIG. 3 shows an example in which a bending portion is provided on the handle side of the means 3. The same can be applied to the case where the head is provided on the head side.
An example of a complicated case in which a handle also serves as a suction tube, such as a canister type or an upright type, will be described. Reference numeral 31 denotes a suction tube communicating with the head, 30 denotes a tilting mechanism as shown in FIG. 7, and 32 denotes a suction tube and handle. 32 is a tilt axis 30
The telescopic coil 36 provided near the front and rear
It can be bent up and down within a certain range by the shaft 35. 33 is a triangular plate having a ball-shaped bulge at the upper end as shown. Reference numeral 34 denotes two L-shaped parallel elastic plates, the right ends of which are fixed to the tube 32 as shown in FIG.
Holes or depressions that engage the ball 3 are provided as shown. The gap between the two plates is smaller than the diameter of the ball, so that when the ball is inserted, the elasticity of the plate causes the gap to open and the ball enters. It is the same as the catch mechanism of a commercially available door. Of course, a magnetic contract may be used.

At the time of normal cleaning, as shown in FIG. 3A, the front and rear handles are bent upward around the shaft 35 so that the balls 33 and the holes 34 are elastically engaged. The contract stopping force contracts stop is a strength that does not come off even when float a further head tip and where the downward the handle with tilting limit theta _L of the tilting axis. If the head is assisted by means of stepping on the head with a foot or the like and the handle is further tilted downward, 33 and 3
When the elastic contact with the handle 4 is released, the handle can be bent downward and tilted substantially horizontally as shown in FIG. 3B.

Embodiment 4: An embodiment of the means 4 is shown in FIG.
32 is divided into front (lower) and rear (upper) portions by a bellows-shaped suction tube 41 which can be bent. Reference numeral 42 denotes an auxiliary tool for the joint bending portion, the front part is adhered to the upper part 32, the rear part is cut up and down to form a U-shaped connecting part when viewed from above, and the auxiliary shaft 45 has the same structure by the joint shaft 44 as shown in the figure. As described above. 42, 43, and 44 limit the three-dimensional flexibility of the bellows two-dimensionally.

A bending control pipe 45 circumscribed in a foldable manner is provided at 42 and 43. The cross section is shown in FIG. 4B. FIG.
A dashed line 45 of A indicates a state in which it is engaged at a position covering both 42 and 43. This position can be stably maintained by a click stop (not shown). In this case, since the handles 42 and 43 are foldably contained in the rigid straight pipe 45, they cannot be bent. Here, if 45 is pulled backward (upward) to the position 45 'of the two-dot chain line,
4 is exposed and can be bent up and down.

When this bent portion is provided at an appropriate position on the long handle, the front portion (lower portion) on the head side of the handle is nearly horizontal, and the rear portion (upper portion) on the handle side is bent upward, so that the space between the bed and the wall is formed. Can be cleaned under a low bed even when it is narrow.

Embodiment 5 An embodiment of the means 5 of the upright type will be described with reference to FIG. 31 is a cleaning head. Reference numeral 51 denotes a main body that contains a fan motor, a dust collection chamber, and the like. The airflow from the head is connected to the main body via the tilting mechanism 30, the suction tube 32, and the mantle tube 50, and is sucked. 32 has sliding portions 52, 5
4 (comprising 42 and 55) are provided to slide on the inner surface of the mantle tube 50. Numeral 54 denotes a sliding portion constituting a joint, and details thereof are shown in FIG. 5C. Reference numerals 42 and 55 have the same structure as that of the fourth embodiment, and form joints that can be bent up and down around the shaft 44. 55 is provided with a packing 59 made of rubber, rubber sponge, or the like for keeping the airtight with the outer tube against suction. 22, 5
The 2,54 (42 + 55) assembly forms a drawn suction tube.

In the normal cleaning state, the extended suction tube is housed inside the mantle tube 50 and is in the state as shown in FIG. 5A. In this state, it has been triggered by a click stop (not shown). Now, as shown in FIG. 5A, when used in a narrow space, it is too long to use horizontally and the space between the bedside and the wall is narrow, so that it cannot be used. In this case, if the joint 54 is bent by pulling out the extended suction tube, the state shown in FIG. 5B is obtained, and it can be used even in a narrow place. If the handle 57 is removed or folded forward, a narrow place can be cleaned, but it cannot be inserted under a bed where the main body is thick and low. According to the present invention, the thickness of the head and the elongated suction tube is small, so that the head can be inserted and cleaned even in a sufficiently low space.

Embodiment 6 An embodiment in which the means 6 is applied to a canister type or upright will be described with reference to FIG. The same can be done with the crawl type. FIG. 6A is a top view of the head. Reference numeral 61 denotes a cleaning room, and 62 denotes cleaning reinforcing means such as a rotary brush built in the head. 32 is a suction tube. 63
Is a large garbage suction chamber according to the present invention. FIG. 6B is the XX section. The bottom surface of the large dust suction chamber 63 has a substantially rectangular lower surface opening in the illustrated example, and its size is close to the cross-sectional size of the suction tube.
The handle up / down tilt mechanism and left / right rotation mechanism are not shown.

As described above, in the case of the upright type and the crawl type, the handle is tilted downward for suctioning large-sized debris, and the head rotates about the rear contact point 67 as a fulcrum, and when the front edge floats, a state as shown in FIG. 6C is obtained. Become. Alternatively, when the head is lifted in the canister, the head is lifted to a hollow state substantially in the state of FIG. 6B. If the large dust suction chamber 63 of the present invention is not provided, the opening on the lower surface of the head is almost occupied by the cleaning and reinforcing means such as a rotating brush, and there is no passage for sucking large dust such as paper waste.
According to the present invention, paper dust having a sufficiently large round bottom opening of the large dust suction chamber 63 can be sucked. In a canister, this opening can be covered with large refuse.

Reference numeral 64 denotes a flange provided on the lower surface of the side wall of the large-sized dust suction chamber 63. The flange 64 suppresses the air flow that passes through the lower end of the thin side wall of the large-sized dust suction chamber by being short-circuited. In order to more completely prevent this air flow loss, a lid 65 can be provided on the lower surface of 63 as shown in FIG. 6D. The lid is 6
When the head is lifted as shown in the figure, the head remains on the floor surface and the large dust suction opening is not affected. 63
A packing with a lid made of rubber or the like can be provided on the lower surface of the side wall.

The above embodiment describes an example in which the large dust suction contact angle is provided near the lower limit of the normal tilt range, but the second contact angle is set at another lower position as claimed. Corners and the like can be provided. For example it is necessary to suck the large dust even when to close the head horizontally cleaning the lower space and low high bed, the handle at the contract stop angle is provided slightly contracts stop angle to top theta ₀ Can be tilted horizontally to lift the head. The present invention is not limited to the above-mentioned exemplifications, and many modified examples according to the gist of the present invention are all included in the present invention.

[0051]

According to the present invention, the head leading edge lift for suctioning large-sized dust can be lifted by tilting the handle downward, and the cleaning operation for the low ceiling height cleaning space can be performed by simple operation as required. The handle can be tilted to near horizontal. Also, at this time, the handle portion can be bent upward in the middle, so that it can be used even in a narrow place. In addition, since a large-sized dust suction opening is separately provided at a position avoiding a cleaning reinforcing means such as a rotary brush for closing the opening of the lower surface of the cleaning head, large-sized dust can be sucked.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an elastic contract.

FIG. 2 is an explanatory diagram of a fixed contract.

FIG. 3 shows an example of a downward bent portion of a handle.

FIG. 4 is an example of a vertically bent portion of a handle.

Fig. 5 Example of elongation and bending of a suction tube in an upright type

FIG. 6 shows an example in which a large dust suction chamber is provided in a head having cleaning enhancement means.

FIG. 7 is an explanatory view of a conventional tilting mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Fixed side fold body 1F Example of means 1 2 Moving side fold body 3 V groove, 3a, 3b Asymmetric V groove 4 Click protruding mechanism accommodation room 5 Ball 6 Spring 7 Folding piece 8 Leaf spring 9 Tilt range 10 Lower Tilting elasticity 11 Low tilting force returning upward 12 Free tilting range up to horizontal after escape from the inclination θ _V Maximum stop angle during storage θ _H Upper limit of tilt angle during normal cleaning θ _L Lower limit of tilt angle during normal cleaning θ ₀ Minimum tilt angle close to horizontal 22 Releasable fixed stopper 23 Foot-operated sliding stopper moving mechanism 24 Spring receiving / sliding body sliding head 25 Fixed side sliding body 26 Releasable fixed stopper 27 Click-stop spring 28 Screw portion with spring 30 Handle tilting mechanism 31 Suction tube from head 32 Suction tube and handle to fan motor 33, 34 Click stop mechanism 35 Bending axis 36, 41 Serpentine tube 42, 43 Joint bending Auxiliary tool 44 Joint axis 45 Sliding joint bending control tube 50 Mantle tube 52 Sliding ring 54 Joint 55 Airtight sliding ring and joint 59 Airtight packing 61 Cleaning head 62 Cleaning reinforcement means 63 Large garbage suction chamber 64 Flange 65 Large garbage suction chamber Lid 66 Shaft 67 Rear contact point 100 Head and handle contact point when handle is tilted 101 Head and handle contact point when handle is stored above

Claims (6)

[Claims] 1. A head unit having at least a cleaning head and a handle unit having a handle for allowing a cleaner to scan the cleaning unit in an upright position. Then on the handle)
Or, independently (in the case of the canister type, the handle also serves as a suction pipe in this case), in a vacuum cleaner provided with a fan motor and / or a dust collecting chamber, the head and the handle are separated by a tilt shaft. The handle portion is coupled so as to be tiltable up and down, and the tilt angle is configured as follows. 1. At least one elastic stop (click stop) near or below the lower limit of the handle tilt angle range (hereinafter referred to as the normal tilt angle) required in a normal floor cleaning state.
Alternatively, a magnetic contract is provided. 2. The resistance to falling out of the contract by further tilting the handle after entering the contract with the handle down (hereinafter referred to as the contract strength)
Is the strength of the contact that requires fixing assistance of the head part, such as stepping on the head part with the foot, and if the head is tilted down without fixing assistance, the head is supported by the rear contact point or the rear wheel with the tilting stopped. At least the front part is configured to float. 3. After the engagement is released downward by the fixing assistance, the handle can be tilted almost horizontally. 2. A head unit having at least a cleaning head and a handle unit having a handle for allowing the cleaner to scan the cleaning unit in an upright position (the head unit in the crawl type, the upright type Then on the handle)
Or, independently (in the case of the canister type, the handle also serves as a suction pipe in this case), in a vacuum cleaner provided with a fan motor and / or a dust collecting chamber, the head portion and the handle portion are tilted by a tilt shaft. The handle portion is coupled so as to be tiltable up and down, and the tilt angle is configured as follows. 1. At least one fixed engagement means is provided near the lower limit of a handle tilt angle range (hereinafter, referred to as a normal tilt angle) required in a normal floor cleaning state or at a lower angle so as to be able to cancel the downward tilt prohibition. When the head is further tilted downward at the contact angle, at least the front portion of the head is lifted up using the rear floor contact point or the rear wheel as a fulcrum. 2. When the fixed engagement means is released by being operated, the handle portion can be tilted downward, and the handle can be tilted almost to near the horizontal. 3. A head unit having at least a cleaning head and a handle unit having a handle for allowing a cleaner to scan the cleaning unit in an upright position. Then on the handle)
Or, independently (in the case of the canister type, the handle also serves as a suction pipe in this case), in a vacuum cleaner provided with a fan motor and / or a dust collecting chamber, the head portion and the handle portion are tilted by a tilt shaft. The handle portion is coupled so as to be tiltable up and down, and the tilt angle is configured as follows. 1. At least one fixed engagement means is provided at or near a lower limit of or below a lower limit of a handle tilt angle range (hereinafter referred to as a normal tilt angle) required in a normal floor cleaning state, and the lower tilt prohibition cannot be released. When the head is further tilted down at this contact angle, at least the front portion of the head is lifted up with the rear floor contact point or the rear wheel as a fulcrum. 2. A joint is provided on the head side and / or the handle side near the tilting axis such that the handle can be tiltably tilted, and the joint is normally an elastic engagement means, a magnetic force engagement means, or a fixed engagement which can be released by a human operation during cleaning. If the handle is tilted down beyond the angle of engagement, and is fixed and assisted by stepping on the head, etc., the joint loses elasticity or magnetic force, When the fixed engagement is released, the vehicle can be bent and the handle can be tilted down to near the horizontal. 4. A vacuum cleaner characterized in that the following means are provided in a crawl type or canister type vacuum cleaner. At least one joint that can be bent upward is provided at a position separated by a specific length from the tilt axis of the handle (which also functions as a suction tube in the case of the canister type), and the handle is divided into upper (rear) and lower (front). Normally, the handle is held almost fixed by elastic contact means, magnetic force contact means or fixed contact means which can be released by operation, but it is fixed by holding the head part or the lower part of the handle by hand or stepping on the foot With the help, the upper part of the handle is tilted upward and elastically engaged,
If the magnetic contract is released or the fixed contract is released,
Means in which the joint can be bent and the upper (rear) part can be tilted upward with respect to the lower (front) part of the handle. 5. An upright type vacuum cleaner having the following means, characterized in that a fixed straight suction pipe of a specific length extending from a tilting axis with a vacuum cleaner head is provided, and an upper end thereof is provided upward. It is an extended suction tube combined with a bendable joint, which moves in the axial direction to a jacket straight tube that communicates with the suction pressure of the main body (dust collection room, fan motor) during normal cleaning. It is included and made impossible to bend.
If the head is fixed with feet or the like and the main body is pulled up, the mantle straight tube moves upward to expose the joint of the extended suction tube, and the joint can be bent, so that the main body and its handle portion are appropriately positioned with respect to the extended suction tube. Means that can be angled. 6. An electric vacuum cleaner in which a cleaning chamber of a suction type or a recirculation type cleaning head is provided with cleaning reinforcing means such as a rotary brush, a tapping mechanism, a combing mechanism, a hair separation mechanism, and the following means is provided. Means for providing a large-sized dust suction chamber having an opening near the cross-sectional dimension of the suction pipe on the lower surface on the suction pipe side of the connection portion between the cleaning chamber and the suction pipe of the vacuum cleaner head.