JP3399835B2 - Flexible hose connection structure and vacuum cleaner using flexible hose connection structure - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a flexible hose having spiral grooves formed in a concavo-convex shape and a flexible hose for improving airtightness at a fitting portion between a flexible hose connected to the flexible hose and a passage body pipe. The present invention relates to a vacuum cleaner using a flexible hose connection structure and a flexible hose connection structure.

[0002]

22 and 23 are views showing a conventional connection structure between a flow passage pipe and a flexible hose having spiral grooves formed therein, and FIG. 22 is a schematic vertical sectional view. Figure, Figure 23
FIG. 3 is a schematic external perspective view showing the connection structure.

In these drawings, reference numeral 601 denotes a flow passage pipe which constitutes a separate flow passage body such as an extension pipe side hose joint connected to a flexible hose or a main body side hose joint, and 602.
Is an air passage, 603 is a spiral concave groove, 604 is a spiral convex groove, and a flow path is formed by fitting a flexible hose including the flow path pipe 601 and the spiral concave groove 603 and the spiral convex groove 604. The fluid path of the body pipe and the flexible hose is connected.

[0004]

When a flexible hose having spiral grooves is used, the flexible hose and the flow passage pipe connected to the flexible hose are fitted together. 22 and 23, when the flexible hose is fitted to the outer circumference of the flow passage body pipe 601, the flow passage body pipe 601 and the spiral concave portion of the flexible hose are formed in the portion. A spiral air passage is unintentionally formed between them.
The air passage is a passage that connects the internal space and the external space of the flexible hose and the fluid path pipe connected to the flexible hose.

22 and 23, the case where the inner peripheral wall of the flexible hose is fitted to the outer peripheral wall of the flow passage body pipe has been described, but contrary to FIGS. 22 and 23, the flow passage body is reversed. Of course, when the outer peripheral wall of the flexible hose is fitted to the inner peripheral wall of the pipe, an unintended air passage is likewise formed. Then, when such an air passage is formed, outside air is sucked through the air passage. Therefore, when the connecting portion formed by the fitting portion of such a flexible hose and the flow path pipe connected to the flexible hose is applied to the flexible hose of the electric vacuum cleaner, the outside air is cleaned. The suction force of the cleaner body is reduced by penetrating into the flow path for transmitting the suction force of the cleaner, which causes a problem that the recent demand for higher power of the cleaner cannot be met.

On the other hand, as a means for improving the airtightness of the fitting portion between the flexible hose having spiral grooves formed in a concavo-convex shape and the passage body hose, it is found in JP-A-9-47408. As described in Japanese Patent Laid-Open No. 9-253012, a method of fixing the end portion of the flexible hose and a separate flow passage body to each other via an elastic member or an adhesive in a non-rotatable manner. ,
A method is known in which a flexible hose is fitted into a separate flow path body and then the end of the flexible hose is melted to block the air passage.

However, with the means for increasing the airtightness of the fitting portion between the flexible hose and the flow path pipe, which are formed by spirally forming the uneven groove as in the prior art, the number of manufacturing steps is increased, This causes deterioration of mass productivity such as a decrease in work efficiency and an increase in product cost. In addition, since a flexible hose formed of ethylene vinyl acetate copolymer (EVA) or the like and a flow path body pipe formed of polypropylene (PP) or the like are firmly fixed to each other, the flexible hose or the flexible hose If either one of the separate flow path bodies connected to is damaged, both of them will be discarded, and it will not be possible to separate each material and it will not be possible to cope with the recycling of resources.

The present invention has been made in view of the above-mentioned various problems of the prior art, and it is possible to reliably ensure the airtightness of the fitting portion between the flexible hose and the flow path body pipe connected to the flexible hose. To provide a flexible hose. It is another object of the present invention to provide a flexible hose connection structure which has a simple structure and in which the flexible hose can be freely attached and detached and the material can be separated and discarded easily.

[0009]

The present invention adopts the following means in order to solve the above problems.

It is composed of a flow passage body pipe and a flexible hose in which concave and convex grooves are spirally formed, and an inner peripheral wall of the flexible hose can be fitted to an outer peripheral wall of the flow passage body pipe. In the flexible hose connection structure, the flexible hose includes a convex groove shielding portion that shields a spiral space formed between an outer convex portion of the flexible hose and an outer surface of the flow passage body pipe. It is characterized in that it is formed in advance on the convex portion of before the fitting .

Further, in the connection structure, the flow passage body pipe and the flexible hose are fitted on the outer peripheral surface of the flow passage body pipe in a spiral groove protruding outward of the flexible hose. It is characterized in that it is provided with a projection for coupling so that it can be screwed.

Further, in the connection structure, the convex groove shielding portion provided on the convex portion of the flexible hose is more than the projection provided on the outer peripheral surface of the flow passage body pipe. It is characterized in that it is located on the flexible hose insertion end side.

Further, it comprises a flow passage body pipe and a flexible hose in which concave and convex grooves are spirally formed, and the outer peripheral wall of the flexible hose is fitted to the inner peripheral wall of the flow passage body pipe. In the flexible hose connection structure, a concave groove shielding portion that shields a spiral space formed between the concave portion inside the flexible hose and the inner surface of the flow path body pipe is formed into the flexible hose. It is characterized in that it is provided in the concave portion of the hose.

Further, in the connection structure, a spiral groove recessed in the flexible hose is fitted on the inner peripheral surface of the flow passage body pipe so that the flow passage body pipe and the flexible body are connected to each other. It is characterized in that it is provided with a projection for coupling the hose so that it can be screwed.

Further, in the connection structure, the concave groove shielding portion provided in the concave portion of the flexible hose has a shape larger than that of the projection provided on the inner peripheral surface of the flow passage body pipe. The flexible hose is located on the insertion end side.

Further, it comprises a flow passage body pipe having an inner cylinder and an outer cylinder, and a flexible hose in which concave and convex grooves are spirally formed, and the flexible pipe is provided on the outer peripheral wall of the inner cylinder of the flow passage body pipe. In a connection structure of a flexible hose in which an inner peripheral wall of a flexible hose is fitted, a spiral hose formed by an outer convex portion of the flexible hose and an outer surface of an inner cylinder of the flow passage body pipe. A convex groove shielding portion that shields a space is provided on the convex portion of the flexible hose, and a spiral spiral concave inside the flexible hose is provided on the inner peripheral surface of the outer tube of the flow path body pipe. It is characterized in that it is provided with a projection that fits in the groove and that couples the flow passage body pipe and the flexible hose in a screwable manner.

Further, it comprises a flow passage body pipe having an inner cylinder and an outer cylinder, and a flexible hose in which concave and convex grooves are spirally formed, and the flexible pipe is provided on the inner peripheral wall of the outer cylinder of the flow passage body pipe. In a connection structure of a flexible hose in which an outer peripheral wall of a flexible hose is fitted, a spiral shape formed by a concave portion inside the flexible hose and an inner surface of an outer cylinder of the flow passage body pipe. A concave groove shielding portion that shields a space is provided in the concave portion of the flexible hose, and a spiral groove protruding outward from the flexible hose is formed on the outer peripheral surface of the inner cylinder of the flow passage body pipe. And a projection for connecting the flow passage body pipe and the flexible hose in a screwable manner.

Further, in the connection structure to the flexible hose, the flexible hose is characterized in that a plurality of the convex groove shielding portions are provided at a constant interval over the entire length of the flexible hose. In the connection structure of the flexible hose,
The flexible hose is characterized in that a plurality of the concave groove shielding portions are provided at regular intervals over the entire length of the flexible hose.

Further, in the flexible hose connection structure, the flow passage body pipe is provided with a hose engaging portion which is rotatable with respect to another fluid passage and is detachable.

The flexible hose is a flexible hose of an electric vacuum cleaner, and the electric vacuum cleaner has a main body of a cleaner having a control circuit and an electric blower, and a main body at a suction port of the main body of the cleaner. An extension pipe connected via a side hose joint, a mouthpiece connected to the extension pipe, a switch operating portion provided on the extension pipe hose joint, an infrared light emitting portion that emits light by operating the switch operating portion, and the cleaning An electric vacuum cleaner using a flexible hose connection structure, which is provided with an infrared ray receiving section provided on the top surface of the machine body.

[0021]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a sectional view of a flexible hose according to this embodiment, FIG. 2 is an external perspective view of the flexible hose, and FIG. 3 is a sectional view taken along the line AA of FIG. It is sectional drawing which shows a concave groove shield part.

In these figures, 101 is a flexible hose, 102 and 105 are spiral concave grooves continuous with each other, and 10
3, 104 are spiral convex portions that are continuous with each other, and the flexible hose 101 is a spiral concave groove 102, 1 that is continuous with each other.
05 and the spiral convex portions 103 and 104 which are continuous with each other, the convex portion dividing portion 1 of the convex portion is divided into the convex portion dividing portion 1 and the convex groove dividing portion 1. 2 is formed.

The convex groove shielding portion 2 is provided in the flexible hose connection structure in which the inner peripheral wall of the flexible hose is fitted to the outer peripheral wall of the flow path body pipe (not shown). The convex groove shielding portions that shield the spiral convex portions 103 and 104 and the spiral space formed by the outer surface of the flow path body pipe are formed. The flow path pipe is a separate flow path body that is fitted and connected to the flexible hose, and is constituted by a part of the extension pipe side hose joint, the main body side joint, and the hose locking member.

The flexible hose 101 is made of a material such as ethylene vinyl acetate copolymer (EVA), and the outer peripheral wall and the inner peripheral wall have convex portions 103, 104 and concave portions which are alternately wound over the entire length of the hose. The grooves 102 and 105 are continuously formed by extrusion so as to be constituted by the continuous grooves. That is, over the entire length of the flexible hose 101, a pair of spiral grooves 105 are formed on both the outer peripheral wall and the inner peripheral wall.
And a spiral upper convex portion 104 is formed. Therefore, the same cross-sectional shape can be obtained by cutting at any part of the hose, which is excellent in mass productivity, and even if the hose is slightly damaged, it can be cut at any point and the damaged part can be eliminated and repaired. Is. Then, in this embodiment, a convex portion dividing portion 1 is formed at a required portion of this hose, and a convex groove shielding portion 2 is formed at this portion.

In this manner, by providing the flexible hose 101 with the convex partial cut portion 1 in a part of the spiral convex portion 104 on the outer peripheral wall side of the flexible hose 101, the flexible hose 101
The convex groove shielding portion 2 is formed in the spiral concave groove 103 on the inner peripheral wall side of the flexible hose 101 and the spiral upper concave groove 103 on the inner peripheral wall side of the flexible hose 101. The air passage 602 connected from the outside to the inside of the flow path body can be completely blocked. In other words, as in the prior art, a reduction in suction force is prevented without having factors such as the use of a separate sealing member or adhesive, or the heat-melting of a part of the hose, which causes cost increase and manufacturability deterioration. A connection mechanism is formed between the flexible hose that can be formed and a separate flow path body that is connected to the flexible hose. Further, according to this configuration, since only the convex partial cut portion 1 and the convex groove shield portion 2 are added to the flexible hose 101, the flexible hose 101 can be screwed into a hose locking member (not shown). The operability for screwing does not increase.

Next, a second embodiment of the present invention will be described with reference to FIGS.

FIG. 4 is a sectional view of the flexible hose according to this embodiment, and FIG. 5 is an external perspective view of the flexible hose.

In the figure, 401 is a flexible hose according to the present embodiment, 102 and 105 are spiral concave grooves that are continuous with each other, and 103 and 104 are spiral convex portions that are continuous with each other. Is a spiral concave groove 102, 105 continuous with each other, and a spiral convex portion 10 continuous with each other.
3, 104, the concave portion shielding portion 2 ′ is formed by dividing the convex portion dividing portion 1 in the convex portion dividing portion 1 of the convex portion.

In the connection structure of the flexible hose in which the outer peripheral wall of the flexible hose is fitted to the inner peripheral wall of the flow path body pipe (not shown), the concave groove shielding portion 2'is flexible. A concave groove shielding portion that shields a spiral space formed between the spiral convex portions 103 and 104 of the hose and the inner surface of the flow passage body pipe is formed.

Since the other features of this embodiment are substantially the same as those described in the first embodiment, detailed description thereof will be omitted.

Next, a third embodiment of the present invention will be described with reference to FIGS.

FIG. 6 is a view showing a hose connection structure at the extension pipe side hose joint portion according to this embodiment, and FIG. 7 is a view showing a connection structure between the hose locking member and the flexible hose according to this embodiment, 8 is a vertical cross-sectional view and a top view of the hose locking member according to the present embodiment, FIG. 9 is a vertical cross-sectional view of the airtight packing according to the present embodiment, and FIG. 10 is a vertical cross-sectional view of the airtight packing retainer according to the present embodiment. FIG. 11 is an external view of the stopper ring according to the present embodiment, and FIG. 12 is a diagram illustrating the main body side hose joint partial hose connection structure according to the present embodiment.

In these drawings, 801 is an opening of the hose joint on the extension pipe side, 802 is a locking hole, 901 is a hose locking member, 902 is an inner cylinder, 903 is an outer cylinder, and 904 is a positioning wall. The locking member 901 is an inner cylinder 902,
The outer cylinder 903 and the positioning wall 904 are integrally formed to form a fluid path pipe.

1001, 1002, 1003.1004
Is four projections for engagement provided on the hose locking member, 100
Reference numeral 5 is a lead portion integrally formed with the inner cylinder 902, and 1006 is an engagement hole provided in the outer cylinder 903.

1101 is an airtight packing attached to the hose locking member 901, 1201 is an airtight packing retainer, 1
202 is an engaging claw provided on the airtight packing retainer.

Reference numeral 1301 denotes a stopper ring for locking the flexible hose to the main body side hose joint or the extension tube side hose joint, 1302 denotes a stopper ring engaging portion 1303.
Is an unlocking knob. Reference numeral 1401 is an opening provided in the main body side joint, 1802 is an extension pipe side hose joint, and 1013 is a main body side hose joint.

The inner cylinder 902 of the hose locking member 901 has a cylindrical shape so as to fit with the inner peripheral wall of the flexible hose 101. The outer cylinder 903 of the hose locking member 901 is a member for fitting into the opening 801 provided integrally with the extension pipe side joint 1802 or the opening 1401 of the main body side joint 1813. The flexible hose 101 is provided inside the outer cylinder 903.
Four protrusions 1001, 1002, 1003, 1004 having an inclination along the spiral groove on the outer peripheral wall side are intermittently arranged. Therefore, when the flexible hose 101 is inserted into the lead portion 1005 formed integrally with the inner cylinder 902 of the hose locking member 901 and the hose locking member 901 is screwed in, the projections 1001, 1002, 1003 and 1004 are attached to the outer peripheral wall of the hose. The spiral recessed groove 103 has a structure in which the spiral recessed groove 103 is sequentially screwed. The mounting operator can know that the hose is screwed to an appropriate position by the end surface of the flexible hose coming into contact with the positioning wall 904 integrally formed with the hose locking member 901.

On the other hand, the hose locking member 901 is provided with an airtight packing retainer 1201 to interpose the airtight packing 1101.
Is attached. The hose locking member 901 and the airtight packing retainer 1201 are snap-on engaged with each other by the two engagement holes 1006 provided in the outer cylinder 903 and the two engagement claws 1202 provided in the airtight packing retainer 1201. Since the airtight packing 1101 is fixed between the hose locking member 901 and the airtight packing retainer 1201, the displacement in the front-rear direction can be prevented and a constant airtightness can be maintained. Further, a stopper ring 1301 formed separately on the outer peripheral wall of the flexible hose 101 is rotatably positioned with respect to the flexible hose 101, and the extension pipe side hose joint 18
No. 02 opening 801 or the main body side hose joint 1813 opening 1401 is inserted from the rear side next to the hose locking member 901. At this time, the two locking portions 1302 integrally provided on the stopper ring 1301 are snap-on engaged with the extension tube side hose couplings 1802 and the locking holes 802 provided in the body side hose couplings 1813, two each. It has stopped.

With these configurations, the flexible hose 101
Even when the pulling force is applied to the hose locking member 901, the hose locking member 901 contacts the stopper ring 1301 locked to the extension tube side hose joint 1802 and the main body side hose joint 1813. Therefore, since the hose locking member 901 functions to lock the flexible hose 101 to the main body side hose joint 1813 or the extension pipe side hose joint 1802, the flexible hose 101 is connected to the main body side hose joint 1813 or the extension pipe side. It does not come off easily from the hose fitting 1802. Further, the connection between the flexible hose 101 and the main body side hose joint 1813 or the extension pipe side hose joint 1802 is not fixed by adhesion or screwing, but a tubular hose locking member 9
01 and the stopper ring 1301 are rotatably held, so that the flexible hose 101 can be used during the cleaning work by the electric vacuum cleaner according to the present embodiment.
Even if a force is applied to the flexible hose 101, the hose locking member 901 that is locked to the flexible hose 101 rotates with respect to the main body side hose joint 1813 or the extension pipe side hose joint 1802. The twisting force is naturally removed, and the flexible hose 101 does not come off.

Next, the operation of detaching the flexible hose 101 from the main body side hose joint 1813 or the extension tube side hose joint 1802 will be described. 2 for stopper ring 1301
One lock release knob 1303 is integrally provided, and by pressing the two lock release knobs 1303 in the radial center direction of the flexible hose 101 almost at the same time, the stopper ring 1
Since the locking portion 1302 of 301 disengages from the locking hole 802, the flexible hose 101 can be detached from the main body side hose joint 1813 or the extension pipe side hose joint 1802 with one touch. Furthermore, in order to separate the hose locking member 901 from the flexible hose 101, the hose locking member 901 can be easily disengaged by twisting in the opposite direction to the mounting direction.

Next, a fourth embodiment will be described with reference to FIG.

FIG. 13 is a vertical sectional view showing the connection structure of the flexible hose according to this embodiment.

In the figure, 151 is a flexible hose 101.
A flow path body pipe connected to the flow path body pipe 151.
The inner peripheral wall of the flexible hose is fitted to the outer peripheral wall of the. Reference numeral 152 denotes a protrusion provided on the outer peripheral surface of the flow path pipe 151, which is fitted into a spiral groove that is convex on the outside of the flexible hose and has an inclination along the groove. 159 is a flow path pipe 15
1 and an air passage formed between the convex portion 103 of the flexible hose 101, and 160 is a lead portion of the flow passage body pipe 151. Reference numeral 1 denotes a convex portion dividing portion of the spiral convex portions 103 and 104, and 2 denotes a spiral space formed by the above-described convex portion 103 of the flexible hose and the outer surface of the flow passage body pipe 151. It is as described above that it is a convex groove blocking portion.

The separate passage body pipe 151, which is fitted and connected to the flexible hose, is composed of a hose joint on the extension pipe side, a joint on the main body side, and a part of the hose locking member. A plurality of projections 152 having an inclination along the spiral groove are intermittently arranged on the outer peripheral wall surface of the flow passage pipe 151, and are screwed into the spiral groove 153 on the inner wall of the hose. There is. The outer diameter of the flow passage pipe 151 and the inner diameter of the flexible hose 101 are substantially the same, and the spiral convex portion 154 on the inner peripheral wall side of the flexible hose 101 and the outer peripheral wall of the flow passage pipe 151 are in close contact with each other. ing. Further, by providing the convex partial cut portion 1 on a part of the outer peripheral wall side spiral convex portion 155 of the flexible hose 101, a part of the spiral concave groove 153 on the inner peripheral wall side of the flexible hose 101 is formed. An air passage that can form the convex groove blocking portion 2 and that is connected to the inside of the flow passage pipe 151 from the outside formed by the outer peripheral wall of the flow passage pipe 151 and the spiral groove 153 on the inner peripheral wall side of the flexible hose 101. 159 is completely shut off. It should be noted that the convex partial cut portion 1 is more than the projection 152 of the flow path body pipe 151,
A groove formed by the convex partial cut portion 1 when the flexible hose 101 is screwed into the passage body pipe 151 by being arranged so as to be located closer to the lead portion 160 of the passage body pipe 151. The shielding portion 2 is the projection 152 of the flow path pipe 151.
Never get on. Therefore, the channel body pipe 1
The work of screwing the flexible hose 101 into the 51 in a screwed manner can be performed smoothly, and even if a pulling force is applied to the flexible hose 101, the flexible hose 101 does not easily come off. Furthermore, using a separate seal member or adhesive,
It is also excellent in productivity because it does not cause cost increase such as heat-melting a part of the hose or a factor that deteriorates manufacturability. Further, it is possible to configure a connection mechanism between the flexible hose that prevents a decrease in suction force due to the inflow of outside air and a separate flow path body connected to the flexible hose. Further, the structure of the flow path body can be simplified and the material can be reduced.

Further, in the flexible hose connection structure according to the present embodiment, the flexible hose 101 is composed of the cleaner body rather than the separate passage body pipe fitted and connected to the flexible hose. In addition, there is an advantage that it is possible to avoid clogging of dust at the connection step portion.

Next, a fifth embodiment of the present invention will be described with reference to FIG.

FIG. 14 is a vertical sectional view showing the connection structure of the flexible hose according to this embodiment.

In the figure, 161 is a flexible hose 401.
Is a flow path body pipe connected to the flow path body pipe 161.
The inner peripheral wall of the flexible hose 401 is fitted to the inner peripheral wall of the. 1
Reference numeral 62 is a projection provided on the inner peripheral surface of the flow path pipe 161, and is a projection that fits into a spiral groove that is concave inside the flexible hose and that has an inclination along this groove. Reference numeral 163 denotes the flow path pipe 161 and the concave portion 10 of the flexible hose 401.
2 is an air passage formed between 2 and 1 is a spiral convex portion 10
Reference numeral 3 ′ denotes a convex portion dividing portion, and 2 ′ denotes a concave groove shielding portion that shields a spiral space formed by the convex portion 103 of the flexible hose and the outer surface of the flow path body pipe 151. This is as described above.

The separate passage body pipe 161 fitted and connected to the flexible hose is a part of the extension pipe side hose joint, the main body side joint, the hose locking member and the like. This channel body pipe 16
The spiral groove 10 of the flexible hose 401 is formed on the inner peripheral wall surface of the flexible hose 401.
A plurality of protrusions 162 having an inclination along the line 5 are intermittently arranged and screwed with the spiral groove 105 on the outer peripheral wall of the hose. Inner diameter of flow path body pipe 161 and flexible hose 4
The outer diameter of 01 is substantially the same, and the spiral convex portion on the outer peripheral wall side of the flexible hose 101 and the inner peripheral wall of the flow passage body pipe 161 are in close contact with each other. Further, since the concave groove shielding portion 2 having the same height as the adjacent convex portions is provided in a part of the outer peripheral wall side spiral concave groove 105 of the flexible hose 104 in the flexible hose 401,
The air passage 163 connecting from the outside to the inside of the flow passage body, which is formed by the inner peripheral wall of the flow passage body pipe 161 and the spiral upper groove 105 on the outer peripheral wall side of the flexible hose 401, is completely cut off. The concave groove shielding portion 2 ′ has a lead portion 164 of the channel body pipe 161 rather than the protrusion 162 of the channel body pipe 161.
Since it is arranged to be located closer to the
When the flexible hose 401 is screwed into 61, the groove shield 2 does not ride on the projection 162 of the flow path pipe 161. Therefore, the channel body pipe 16
The work of screwing the flexible hose 401 onto the screw 1 can be performed smoothly, and the flexible hose 4
Even if a pulling force is applied to 01, it does not come off easily. Furthermore, since there are no factors such as the use of a separate sealing member or adhesive, or the heat-melting of a part of the hose, which will increase the cost and deteriorate the manufacturability, the suction force by the inflow of outside air is also excellent in productivity. Flexible hose that prevents the deterioration of
A connection mechanism with a separate channel body connected to this can be configured. Further, in the present embodiment, the structure of the flow path pipe can be simplified and the number of materials can be reduced. Further, the connection structure of the flexible hose of this embodiment is such that when the separate flow path body pipe fitted and connected to the flexible hose is located closer to the cleaner body 1801 than the flexible hose 101, the connection is made. There is also an advantage that it is possible to avoid clogging of dust at the step. Moreover, the end surface of the flexible hose 401 does not appear on the external surface, and it is not necessary to provide another component such as a decorative cover. The other features of this embodiment are substantially the same as the matters described in the fourth embodiment, and thus detailed description thereof will be omitted.

Next, a sixth embodiment will be described with reference to FIG.

In FIG. 15, 171 is a flow passage pipe connected to a flexible hose, 172 is a lead portion integrally formed with the inner pipe of the flow passage pipe, and 173 is formed in the inner pipe of the flow passage pipe. Protrusions, 174 are outer cylinders formed on the flow channel pipe, 175 are inner cylinders formed on the flow channel pipe, and 176 are positioning walls formed on the flow channel pipe.

The separate passage body pipe 171 fitted and connected to the flexible hose is a part of the extension pipe side hose joint, the main body side joint, the hose locking member and the like. This channel body pipe 171
An inner cylinder 175, an outer cylinder 174, and a positioning wall 176 are integrally formed with each other. The inner peripheral wall of the outer cylinder 174 has a tubular shape so as to fit with the outer peripheral wall of the flexible hose 401. On the outer peripheral wall of the inner cylinder 175, a protrusion 17 having an inclination along the spiral groove 103 on the inner peripheral wall side of the flexible hose 401.
A plurality of 3 are intermittently arranged. Channel body pipe 17
When the flexible hose 401 is inserted into the lead portion 172 that is integrally formed with the inner cylinder 175 of No. 1 and the flow path body pipe 171 is screwed in, a plurality of protrusions 173 are formed in the spiral hose on the inner peripheral wall side of the flexible hose 401. 103 has a structure in which the screws are successively screwed. The mounting operator can know that the hose has been screwed to an appropriate position by contacting the end face of the flexible hose with the positioning wall 176 formed integrally with the flow path pipe. The inner diameter of the outer cylinder 174 of the flow passage body pipe 171 and the outer diameter of the flexible hose 401 are substantially the same, and the spiral convex portion 104 on the outer peripheral wall side of the flexible hose 401 and the inner peripheral wall of the outer cylinder 174 are different from each other. It is in close contact. In addition, the groove hiding portion 2 is integrally provided in the flexible hose 401 in a part of the spiral groove 105 on the outer peripheral wall side of the flexible hose 401. Since the height is the same as that of the portion, the flow passage pipe 171 is provided from the outside formed by the inner peripheral wall of the outer tube 174 of the flow passage pipe 171 and the spiral groove 105 on the outer peripheral wall side of the flexible hose 401. Air passage 163 connected to the inside
Is completely shut off. Therefore, with this structure, there are no factors such as the use of a separate sealing member or adhesive, or the heat-melting of a part of the hose, which is a factor that increases cost and deteriorates manufacturability. It is possible to configure a connection structure of a flexible hose that prevents a decrease in suction force due to inflow and a separate channel body pipe connected to the flexible hose.

In this embodiment, a projection is provided on the outer peripheral wall of the inner cylinder of the flow path pipe, and the convex groove shield 2 is provided on the flexible hose.
Although an example of a connection structure for connecting the flow path body pipe and the flexible hose has been shown, the projection is provided on the inner peripheral wall of the outer cylinder of the flow path body pipe to form a flexible hose. Needless to say, it is possible to form a concave groove shielding portion 2 ′ to form a connection structure for connecting the flow path body pipe and the flexible hose.

Next, an electric vacuum cleaner to which the flexible hose of the present invention can be applied will be described.

FIG. 16 is a perspective view of the appearance of an electric vacuum cleaner to which the flexible hose of the present invention can be applied, and FIG. 17 is a top view of the appearance of the electric vacuum cleaner.

In these drawings, reference numeral 1801 denotes a cleaner body having a control circuit, an electric blower, etc. built therein, 101 denotes a flexible hose connected to a suction port portion 1812 of the cleaner body 1801 via a body side hose joint 1813. , 1802 is an extension pipe side hose joint, 1803 is an extension pipe side hose joint 18
02 is an extension pipe, 1804 is a suction body connected to the extension pipe 1803, and 1805 is an extension pipe side hose joint 18
02 is a switch operating portion, 1806 is a first infrared ray emitting portion provided on the extension tube side hose joint 1802,
Reference numeral 1807 denotes a second infrared ray emitting portion provided on the extension pipe side hose joint 1802, 1809 denotes an infrared ray receiving portion provided on the upper surface of the cleaner body 1801, and 1814 denotes a ceiling in the room.

FIG. 18 is a vertical sectional view of an electric vacuum cleaner to which the flexible hose of the present invention can be applied, and FIG. 19 is a view showing a power supply board used in the electric vacuum cleaner.

In these figures, the cleaner body 1801
The dust collection chamber 1 that houses a lower case 1811 that covers the lower part in the front part, a lid 1808 that covers the upper part of the front surface, a suction port portion 1812 provided on the lid 1808, and a dust bag 1816.
815, an airtight holding cover 1817 attached to the lid 1808 by a member different from the lid 1808 for holding the airtightness in the dust collection chamber 1815, and the lower case 1 at the rear part thereof.
It has an electric blower storage chamber 1819 formed by 811 and an inner case 1818. The dust collection chamber 1815 and the electric blower storage chamber 1819 are separated by a partition 1820 integrally provided in the lower case 1811. The partition 1820 is provided with a dust collection chamber 1815 and an intake port 1822 of the electric blower 1821. Multiple vents 182 for communication
3 and the heat sink mounting means 1824 are integrally provided. The heat radiating plate mounting means 1824 engages with the power supply board 2102 shown in FIG. 19 in which a bidirectional switching element for controlling the phase of the electric blower 1821 is mounted, and the heat radiating plate 2101 directly attached to the bidirectional switching element. There is. The power supply board 2102 and the heat radiating plate 2101 directly attached to the bidirectional switching element are fixed by screws 2103. Further, in the dust collection chamber 1815, the dust collection bag 1
816, in the electric blower chamber 1819, an electric blower 182 as a means for generating a suction force for collecting dust.
1 is stored. A filter 1825 is provided in the dust collection chamber 1815 so as to cover the ventilation port 1826 on the intake side of the electric blower 1821. A board housing 182 covered with an upper case 1827 is provided on the upper part of the inner case 1818.
8 is formed, and the control board 1829 is housed therein. On the control board 1829, the first infrared ray emitting section 1806 and the second infrared ray emitting section 1 of the extension pipe side hose joint 1802 are provided.
An infrared light receiving element 1830 that receives an infrared signal emitted from 807 is provided. This infrared light receiving element 1
An infrared light receiving cover 1831 formed of another material that transmits infrared light is provided on the upper case 1827 so that the infrared signal reaches 830. A handle 1810 and a lid 1808 are rotatably attached to the upper case 1827. A cover body 1832 is fixed to the rear of the upper case by screws 1833. When the user of the cleaner presses one of the switch operating units 1805 provided on the extension pipe side hose joint 1802, the signal code according to the pressed switch is the first infrared emitting unit 180 as an infrared signal.
6 and the second infrared ray emitting section 1807. The first infrared light emitting unit 1806 is arranged so as to face substantially vertically upward in a normal use state, and the infrared signal emitted from the first infrared light emitting unit 1806 hits the ceiling or wall of the room and is reflected, Infrared receiver 1 of vacuum cleaner body 801
Reach 809. In addition, the second infrared light emitting unit 1807
Is arranged at the grip end 1834 of the extension pipe side hose joint so as to face downward from substantially horizontal, and the infrared signal radiated from the second infrared light emitting portion 1807 is directly
The infrared light receiving unit 1809 of the cleaner body 1801 is reached. The infrared signal that reaches the infrared light receiving unit 1809 is received by the infrared light receiving element 1830, and the control board 182 receives the infrared signal.
The vacuum cleaner is controlled via 9.

As described above, since the operation information input by the user is transmitted to the cleaner main body 1801 by using the infrared signal to control the electric vacuum cleaner, the flexible hose 101, the extension tube, and the like. It is not necessary to use a power line for 1803 and the like, the weight of the vacuum cleaner can be reduced, and even if the flexible hose 101 is temporarily deformed, it can be restored, so that the user mistakenly uses the hose. Even if you step on the hose, there is no danger of the hose permanently deforming.

Next, the operation of the electric vacuum cleaner will be described.
The electric vacuum cleaner 1801 is a suction airflow generated by the operation of the electric blower 1821, and collects the dust sucked from the suction body 1804 into the dust collection bag 1816 in the dust collection chamber 1815 via the extension tube 1803 and the flexible hose 101. To dust. Dust bag 1
The air flow filtered by 816 is further sucked by the electric blower 1821 while filtering the fine dust by the filter 1825 and then cooling the heat radiating plate 2101. Electric blower 18
The airflow discharged from 21 is guided to the outside of the electric blower storage chamber 1819 from the outlet at the bottom of the electric blower storage chamber 1819. Exhaust gas emitted from the electric blower chamber 1819 first hits the sound absorbing material 1835 provided inside the lower case 1811, and the exhaust gas about 9
It bends 0 degrees and goes to the rear of the main body, goes upward along the sound absorbing material 1835, is filtered again by the exhaust filter 1836, and is then discharged to the outside of the main body. Exhaust filter 1 here
836 is a cover body 1832 and a filter cover 1837.
The exhaust filter 1836 can be easily replaced by removing the filter cover 1837. Next, an electric vacuum cleaner to which the extension hose can be attached by applying the flexible hose connection structure of the present invention will be described.

FIG. 20 is an external view of a vacuum cleaner to which a hose intermediate joint and an extension hose are connected. FIG. 21 is a partial sectional view of the hose intermediate joint.

In these figures, 2202 is a hose intermediate joint. The cylindrical hose intermediate joint 2202 has a structure in which the hose locking members 901 are inserted on both sides, and the airtight packing 1101 is abutted at the center to prevent the airflow from leaking. Since the inner diameter of the hose intermediate joint 2202 is the same as the opening 1401 of the main body side hose joint 1813 and the opening 801 of the extension pipe side hose joint 1802, if the stopper ring 1301 is inserted into the hose intermediate joint 2202, The locking portion 1302 is locked in the locking hole 802 provided integrally and can be connected.
Even when the extension hose 2201 is stored after use, it can be removed with one touch by pushing the lock release knob 1303 in the radial center direction.

[0064]

As described above, the present invention provides a flexible hose capable of reliably ensuring the airtightness of the fitting portion between the flexible hose and the flow path pipe connected to the flexible hose. it can. Further, the present invention provides a flexible hose connection structure and a vacuum cleaner using the flexible hose connection structure, which has a simple structure, in which the flexible hose can be freely attached and detached, and the material can be separated and discarded easily. Can be provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a flexible hose according to a first embodiment of the present invention.

FIG. 2 is an external perspective view of the flexible hose according to the first embodiment of the present invention.

FIG. 3 is a view showing the flexible hose according to the first embodiment of the present invention and is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a sectional view of a flexible hose according to a second embodiment of the present invention.

FIG. 5 is an external perspective view of a flexible hose according to a second embodiment of the present invention.

FIG. 6 is a view showing a hose connection structure at an extension pipe side hose joint portion according to a third embodiment of the present invention.

FIG. 7 is a view showing a connection structure between a hose locking member and a flexible hose according to a third embodiment of the present invention.

FIG. 8 is a vertical cross-sectional view and a top view of a hose locking member according to a third embodiment of the present invention.

FIG. 9 is a vertical sectional view of an airtight packing according to a third embodiment of the present invention.

FIG. 10 is a vertical sectional view of an airtight packing retainer according to a third embodiment of the present invention.

FIG. 11 is an external view of a stopper ring according to a third embodiment of the present invention.

FIG. 12 is a diagram illustrating a main body side hose joint partial hose connection structure according to a third embodiment of the present invention.

FIG. 13 is a vertical cross-sectional view showing a flexible hose connection structure according to a fourth embodiment of the present invention.

FIG. 14 is a vertical cross-sectional view showing a flexible hose connection structure according to a fifth embodiment of the present invention.

FIG. 15 is a vertical cross-sectional view showing a flexible hose connection structure according to a sixth embodiment of the present invention.

FIG. 16 is a perspective view of the appearance of an electric vacuum cleaner to which the flexible hose of the present invention can be applied.

FIG. 17 is a top view of the appearance of an electric vacuum cleaner to which the flexible hose of the present invention can be applied.

FIG. 18 is a vertical sectional view of an electric vacuum cleaner to which the flexible hose of the present invention can be applied.

FIG. 19 is a diagram showing a power supply base used in an electric vacuum cleaner to which the present invention can be applied.

FIG. 20 is an external view in which a hose intermediate joint and an extension hose are connected to an electric vacuum cleaner to which the present invention can be applied.

FIG. 21 is an external view of a state in which a hose intermediate joint and an extension hose are connected to an electric vacuum cleaner to which the present invention can be applied.

FIG. 22 is a vertical cross-sectional view illustrating an air passage that connects the outside and the inside of the flow path body in the conventional flexible hose.

FIG. 23 is an external perspective view illustrating an air passage that connects the outside and the inside of the flow path body in the conventional flexible hose.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Convex partial cut part 2 Convex groove blocking part 2'Concave groove blocking part 101,401 Flexible hose, 151,161,171,607 Flow path pipe 159,163,602 Air passage 1802 Extension tube side hose joint 1813 Body side hose joint 102, 105, 153, 603 Spiral groove 103, 104, 154, 155, 604 Spiral ridge 160, 1605 Lead 174, 903 Outer cylinder 175, 902 Inner cylinder, 176, 904 Positioning wall 801, 1401 Opening 802 Locking hole 901 Hose locking member 1001, 1002, 1003, 1004, 152, 1
62,173 Protrusion, 1006 Engagement hole 1101 Airtight packing 1201 Airtight packing retainer, 1202 Engagement claw 1301 Stopper ring 1302 Locking part, 1303 Lock release knob 2201 Extension hose 2202 Hose intermediate joint

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-9-253012 (JP, A) JP-A-4-116937 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) A47L 9/24

Claims (5)

(57) [Claims] 1. A flow passage body pipe and a flexible hose in which concave and convex grooves are spirally formed. An inner peripheral wall of the flexible hose is detachably attached to an outer peripheral wall of the flow passage body pipe. In the connection structure of the fitted flexible hose, a convex groove shielding portion that shields a spiral space formed between an outer convex portion of the flexible hose and an outer surface of the flow passage body pipe, The fitting to the convex portion of the flexible hose
A connection structure for a flexible hose, which is formed in advance before being crimped . 2. A flow passage body pipe and a flexible hose in which concave and convex grooves are spirally formed. An outer peripheral wall of the flexible hose is detachably attached to an inner peripheral wall of the flow passage body pipe. In the fitting structure of the fitted flexible hose, a concave groove shielding portion that shields a spiral space formed in the concave portion and the inner surface of the flow passage body pipe in the flexible hose, In the concave portion of the flexible hose, the fitting
A connection structure for a flexible hose, which is formed in advance before being crimped . 3. A flow passage body pipe having an inner cylinder and an outer cylinder concentrically formed at one end thereof with a positioning wall interposed therebetween, and a flexible hose having spiral grooves.
In a connection structure of a flexible hose in which an inner peripheral wall of the flexible hose is detachably fitted to an outer peripheral wall of an inner cylinder of the flow path body pipe, a portion protruding outward from the flexible hose and the A convex groove shielding portion that shields a spiral space formed on the outer surface of the inner cylinder of the flow path body pipe is formed in advance on the convex portion of the flexible hose before the fitting , The flow passage body pipe and the flexible hose are screwed to each other by fitting into the inner peripheral surface of the outer pipe of the flow passage body pipe into a concave spiral groove in the flexible hose. A connecting structure for a flexible hose, characterized in that the connecting structure has a protrusion. 4. A flow passage body pipe having an inner cylinder and an outer cylinder concentrically formed at one end thereof with a positioning wall interposed therebetween, and a flexible hose having spiral grooves.
In a connection structure of a flexible hose in which an outer peripheral wall of the flexible hose is detachably fitted to an inner peripheral wall of an outer cylinder of the flow path body pipe, a concave portion inside the flexible hose and the A concave groove shielding portion that shields a spiral space formed on the inner surface of the outer cylinder of the flow path body pipe is formed in advance in the concave portion of the flexible hose before the fitting , On the outer peripheral surface of the inner pipe of the flow passage body pipe, a convex spiral groove of the flexible hose is fitted, and the flow passage body pipe and the flexible hose are screwed together. A connecting structure for a flexible hose, which is provided with a protrusion. 5. The flexible hose according to claim 1, wherein the flexible hose is a flexible hose of an electric vacuum cleaner,
The vacuum cleaner includes a cleaner body having a control circuit and an electric blower built therein, an extension pipe connected to a suction port of the cleaner body through a hose joint on the body side, and a suction body connected to the extension pipe. A flexible hose comprising a switch operating portion provided on the extension pipe hose joint, an infrared light emitting portion that emits light by operating the switch operating portion, and an infrared light receiving portion provided on the upper surface of the cleaner body. An electric vacuum cleaner that uses a connection structure.