JP2005279137A - Suction hose and vacuum cleanser having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve airtightness of a connecting part between a suction hose body and a connecting pipe, reduce ventilation loss, and improve productivity and assembling characteristics. <P>SOLUTION: In the suction hose used for a vacuum cleaner, an outer circumference of the connecting pipe 109 is thrusted into an inner circumference of the hose body 108, and molding resin such as ABS resin or the like is poured on an outside face of the connecting part between the hose body 108 and the connecting pipe 109 so as to mold them into an integrated molding. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a suction hose having a connecting pipe connected to at least one end of a hose body and a vacuum cleaner including the suction hose.

  A hose used in a conventional vacuum cleaner has an airtight member or adhesive coated on the outer periphery of the connection pipe on the inner periphery of the hose body, and is further wrapped with vinyl tape several times around the connection. The connection part was covered with the hose cover. The vinyl tape to be wound around the connecting portion has to be tightly wound in order to keep the hose body and the connecting pipe from coming off and airtight, resulting in problems such as poor assembly and productivity. In order to solve this, a technique such as Patent Document 1 has been proposed.

  According to this patent document 1, the suction hose has a hose body whose surface is formed in a bellows shape, a connecting pipe connected to a cleaner body in which one end is inserted into one end of the hose body, and a hose. It has a connecting tube as a hand control tube with one end inserted into the other end of the body. In addition, the other end part of the connection pipe is detachably connected to a connection part formed at the front part of the cleaner body. An extension pipe is connected to the other end of the hand control pipe.

  An adhesive is applied between the inner peripheral portion of the one end portion of the hose body and the outer periphery of the one end portion of the connecting pipe through a member for airtightness, and the portion is further formed in a substantially semi-cylindrical shape. Present, the hose cover is covered with a hose cover having a screw hole formed near one end.

  Patent Document 2 is cited as a technique for integrally forming the hose and the connecting pipe. In this patent document 2, in a power supply connection structure of a vacuum cleaner hose using a plate-shaped terminal ring, a terminal ring wound with a metal terminal directly connected to an electric wire drawn from the hose is connected to a connecting terminal of the hose. The hose and the terminal ring are arranged so as to be integrated with each other by being directly fitted in and thermocompression bonded. A vacuum cleaner hose in which resin is poured directly into the hose body and the connecting pipe member is molded integrally with the hose body and the terminal ring.

JP 2003-159203 A

Republic of Korea: JP2001-000225

  However, in the technique disclosed in Patent Document 1, there is a technique in which a tubular elastic member is fastened with a hose cover as an airtight member. However, the tubular elastic member has a large repulsive force. The hooking force between the hose covers and the like is not sufficient, and there is a problem that productivity and assemblability deteriorate because a screw hole is provided and a tightening force with a screw is required.

  Further, as disclosed in Patent Document 2, there is a suction hose in which a connection pipe is integrally formed with a hose body in order to improve assemblability. However, in the connection pipe formed integrally with the hose body, the inner peripheral surface and the outer periphery of the hose body. Since the resin is poured directly into the surface, leakage of the resin from the bellows-shaped parts on the inner and outer peripheral surfaces, peeling of the hose body and the resin end, burrs are bent due to bending of the hose body, etc. Become. Further, since air with a high flow velocity flows on the inner peripheral surface of the hose, even if the resin or the like is peeled off, the resin is peeled off by the force of the air, and the resin is greatly peeled off due to the force applied to the burrs. And when air containing dust flows into it, dust accumulates at the resin peeling site, causing significant airflow loss or clogging of the dust, or problems such as reduced airtightness due to great resin peeling from the hose body, and molding. Not only are the conditions very delicate and difficult, it is also possible that the suction hose has a short life and a high defect rate as a product.

  Accordingly, an object of the present invention is to solve the above-mentioned problems, to provide a suction hose that can reduce the loss of ventilation in the suction hose and improve the airtightness in the hose and reduce the defective rate, and a vacuum cleaner having the suction hose. is there.

  In order to achieve the above object, the present invention is characterized in that, in a suction hose in which a connecting pipe is connected to at least one end of a hose body, the outer peripheral side of the connecting pipe is disposed on the inner peripheral side of the hose body. It is that it was integrally molded in the state.

  In addition to the first means, a hose cover member covering the integrally formed portion is disposed on the outer periphery of the integrally formed portion, and the hose cover member is integrally formed with the integrally formed portion.

  Further, in addition to the first means, a lead wire and a terminal portion connected to the lead wire are disposed on the hose body, and the lead wire, the terminal portion, and the connection pipe are insert-molded.

  Furthermore, in addition to the first means, a suction hose characterized in that an uneven portion is provided on at least a part of the connecting pipe on the hose body connecting portion side.

  Further, in addition to any one of the first to fourth means, a hose member having a higher heat shrinkage rate than the connecting pipe was used.

  According to the present invention, it is possible to provide a suction hose for a vacuum cleaner with a small number of parts, good assembly and productivity, low airtightness in the hose, low air loss, and a low defective rate.

  Below, 1st embodiment in this invention is described using FIGS. 1-4 or FIG. Moreover, FIGS. 5-8 is a vacuum cleaner main body which can apply the suction hose of this invention in this Embodiment.

  FIG. 5 shows a vacuum cleaner 100 according to one embodiment of the present invention. The vacuum cleaner 100 includes a vacuum cleaner main body 101 and a suction port body 105 communicated with the other end of a suction hose 102 connected at one end to the vacuum cleaner main body 101 via extension pipes 103 and 104. Further, a dust collection chamber 106 shown in FIG. 7 communicating with the suction hose 102 is formed inside the front side of the cleaner body 101, and suction negative pressure is applied to the dust collection chamber 106 inside the rear side of the cleaner body 101. An electric blower 107 is provided.

  The suction hose 102 includes a hose body 108 having a bellows-like surface, a connecting pipe 109 connected to the cleaner body 101 having one end 109a inserted into one end 108a of the hose body 108, and a hose body. The other end portion 108b of 108 has a hand operation tube 110 as a connection tube having one end portion inserted therein. In addition, the other end 109b of the connection pipe 109 is detachably connected to a hose opening 111 formed at the front of the cleaner body 101. An extension pipe 103 is connected to the other end 110 a of the hand operation pipe 110.

  The vacuum cleaner main body 100 has a lower case 131 having moving wheels 130 as shown in FIG. 7 and a hose port 111 for connecting a suction hose to the front thereof, covering the upper portion of the lower case 131, and a dust collecting case It has a lid 133 that forms a dust collection chamber 106 that houses 132. In addition, an engagement claw 134 is formed at the front portion of the lid 133, and is engaged with an engagement hole 135 provided in the hose port 111 when the lid 133 is closed. Thus, the lid 133 is prevented from opening carelessly. The vacuum cleaner main body 100 has an electric blower chamber 137 and a cord reel chamber 138 formed by a lower case 131 and an upper case 136 at the rear thereof. The electric blower chamber 107 and the dust collection chamber 106 are partitioned by a partition wall 139 and communicated by a lattice portion 141 that serves as an intake port 140 for the electric blower 107 provided in the partition wall 139.

  The electric blower chamber 137 houses and holds the electric blower 107 so that the intake side of the electric blower 107 faces the dust collection chamber 106 through the lattice portion 141 and the filter portion 142. The electric blower 107 is supported on the front side by a vibration isolating rubber 143 and on the rear side by a vibration isolating rubber 144. The cord reel chamber 138 stores and holds a cord reel 147 for winding the power cord 146 and storing it in the main body.

  An exhaust port 148 is provided on the rear surface of the vacuum cleaner main body 100, and a large circular exhaust port 149 and a small circular exhaust port 150 are provided on the left and right sides of the side of the vacuum cleaner main body 100 where the wheels 130 are attached. The air filtered by the dust collecting case 132 and the filter 142 passes through the exhaust filter 151 while cooling the inside of the electric blower 107, from the rear exhaust port 148, the side large circular exhaust port 149, and the side small circular exhaust port 150. Discharged.

  The electric blower 107 includes a blower unit 152 and an electric motor unit 153, and a ventilation path 154 is provided at the rear part of the blower unit 152, and a part of the exhaust of the blower unit 152 is discharged from the ventilation path 154. The sound absorbing material 155 is bonded to the lower case 131 with an adhesive or the like. Although the sound absorbing material 155 is divided into a plurality of parts, the sound absorbing material may be integrally formed and bonded to the lower case 131 as needed without being limited thereto.

  An inner case 156 is provided above the electric blower 107 held in the electric blower chamber 137 to cover the upper side of the electric blower 107 and constitute the upper wall surface of the electric blower chamber 137. In the electric blower chamber 137, a flame-retardant sound absorbing material 157 is disposed on the outer periphery of the electric blower 107 having the exhaust port on the side of the electric motor unit. A control circuit board 158 for controlling the rotational speed of the electric blower 107 is disposed on the upper part of the inner case 156.

The control circuit board 158 is provided with a display element 159 that displays when dust collects in the dust collecting case 132, the filter is clogged, and the time for throwing away the dust has arrived. Sectional drawing of the hose which concerns on is shown.

  In these figures, reference numeral 108 in FIG. 1 is a bellows flexible hose body, 109 is a connecting pipe connected to the hose body 108, and 112 is a sealing member for airtightness and is wound around the connecting pipe 109. Reference numeral 118 denotes a seal member for airtightness of the connecting portion with the main body connecting pipe 120 or the hand operating pipe 110 shown in FIGS. 113 is an adhesive for disposing or fixing the sealing member 112, the hose body 108, and the connection pipe 109; 116 is a resin portion in which the outer surface of the hose body 108 and the outer surface of the connection pipe 109 are integrally molded; A tape wound around the end portion 117a of the electric wire 117 to insulate and maintain hermeticity, and a hose having a semi-cylindrical shape arranged to cover the hose body 108, the connecting pipe 109, and the resin portion 116. It is a cover.

  The hose body 108 is made of a material such as vinyl chloride, and the outer periphery has a bellows-like shape composed of repeated convex portions and concave portions over the entire length. On the inner peripheral surface of the hose body 108, a covered electric wire 117 is wound around the entire circumference according to the bellows-like convex portion 108c of the hose body 108. The bellows-like hose body 108 is composed of two or three covered electric wires 117 and transmits different application signals or currents.

  The end surfaces 108a and 108b of the hose body 108 are covered with the covered electric wire 117, and lead wires having various uses are connected to the peeled electric wire end portion 117a by soldering or welding. ing.

  The connecting pipe 109 is a rigid connecting pipe made of ABS (acrylonitrile-butadiene-styrene resin) or the like. 121 is a first groove for fitting the seal member 118 and the connecting pipe 109 to facilitate positioning, and 122 is when the coupling locking claw 125 is caught when connected to the vacuum cleaner main body connecting pipe 120 or the hand control pipe 110. The second groove portion 123, which serves as a retainer, is used as a lead wire routing space, a contact terminal support member (SP supporter) 160, etc., and a lead wire guiding space led from the terminal. The third groove portion 124 is formed with a fourth groove portion used when positioning the semi-cylindrical hose cover 115 disposed so as to cover the hose body 108 and the connecting pipe 109.

  The other end of the connection pipe 109 is detachably attached via a connection port (hose port) formed in the cleaner body 101 and the cleaner body connection pipe 120. It communicates with the dust chamber 106. Here, as shown in FIG. 2 or FIG. 3, the connecting tube second groove portion (coupling locking groove portion) 122 formed in the connecting tube 109 is formed as a separate member on the cleaner body connecting tube 120 or the hand operation tube 110. The connecting claw 125 is caught and the connection pipe 109 and the cleaner body connection pipe 120 or the hand operation pipe 110 are connected and fixed. To remove the connecting pipe 109 from the cleaner main body connecting pipe 120 or the hand operating pipe 110, the connecting locking claw 125 that is fitted to the cleaner main body connecting pipe 120 or the hand operating pipe 110 with a separate member is pulled out. be able to.

  In the suction hose, a procedure for integrally molding the resin on the outer surface of the hose body 108 and the connecting pipe 109 will be described with reference to FIGS.

  9 is a cross-sectional view of the state before screwing the connecting pipe 109 and the hose body 108, FIG. 10 is a cross-sectional view of the state in which the connecting pipe 109 is screwed into the hose body 108, and FIG. Sectional drawing of the state which gave the property is shown.

  9 and 10, the outer peripheral surface of the connecting pipe 109 is screwed into the inner peripheral surface of the hose body 108. When the connecting pipe 109 is screwed into the hose body 108, if the protrusion 161 for preventing the hose from being removed is provided on the outer peripheral surface of the connecting pipe 109, the protrusion and the hose body 108 are used along the bellows. Screw the connecting pipe 109. When screwed, the gap between the end portion 108a of the hose body 108 and the connecting pipe 109 is prevented.

  11, the hose body 108 and the connecting pipe 109 are screwed into a machine such as a molding machine and set in a moldable device. As shown in FIG. The resin flows in a cylindrical shape around the boundary, and the resin flows in a cylindrical shape along the outer periphery of the bellows portion at the end portion 108a of the hose body 108, and the resin is airtight at the connection portion between the end portion 108a of the hose body 108 and the connecting pipe 109. The hose body 108 and the connecting pipe 109 are integrally molded while taking airtightness, and if a hose with a high heat shrinkage rate is used at this time, the hose shrinks due to the heat of the resin. Therefore, the hose body 108 and the connecting pipe 109 are more closely attached and the airtightness is improved. By these moldings, the airtightness between the hose body 108 and the connecting pipe 109 can be improved, so that a vacuum cleaner with less leakage and a strong suction force can be provided.

  The molding material formed into a cylindrical shape may be a rigid connecting tube made of ABS (acrylonitrile-butadiene-styrene) resin or the like, or a tubular elastic body such as elastomer or natural rubber.

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

  FIG. 12 is a cross-sectional view showing the shape of the integrally formed portion when the hose body 108 and the connecting pipe 109 are integrally formed.

  In FIG. 12, when the inner peripheral side of the hose body 108 and the outer peripheral side of the connecting pipe 109 are connected, and the resin is poured into the connecting portion to perform integral molding, the shape of the resin portion is the same shape as the hose cover 115 or a function similar thereto. By adopting a shape that gives the shape, the number of parts can be reduced. Since the hose cover 115 becomes the design surface of the product, it is necessary to clean the mold cavity surface of the molding machine. In addition, the hose cover 115 is usually formed by combining two semi-cylindrical members to cover the hose body 108 and the connecting pipe 109 so as to form a hollow cylindrical member. Therefore, it is possible to provide a suction hose having a good appearance in a state where there is little seam between the hose covers 115.

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

  FIG. 13 is an external view showing the shape of the integrally formed portion when the hose body 108 and the connecting pipe 109 are integrally formed.

  FIG. 13 shows a portion where the lead wire is disposed by soldering, welding, caulking or the like on the end portion of the hose body 108 and the end portion of the electric wire 117 when the hose body 108 and the connecting pipe 109 are screwed. Shows what is integrally molded.

  Up to now, it has been necessary to wrap the insulating tape or protect it with an equivalent member in a state where the solder, weld or crimped portion between the lead wire peeling portion and the lead wire at the end of the hose body 108 is exposed. . However, an insulating effect or a waterproof effect can be obtained by using a material with high insulation resistance or a highly waterproof member.

  In addition, since the end portion of the lead wire is fixed, it is possible to prevent disconnection of the lead wire due to movement of the lead wire, and the hand operation tube 110, the vacuum cleaner main body connection tube (hose screw) 120 or the hand operation tube 110 is rotated. In this case, it is possible to prevent conduction failure and lead wire disconnection.

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

  FIG. 14 is an external view showing the shape of the integrally formed portion when the hose body 108 and the connecting pipe 109 are integrally formed.

  Protrusions 161 as shown in FIG. 14 are provided on any of the outer peripheral sides of the connecting pipe 109 to reinforce the pulling force of the hose body 108 and the connecting pipe 109 when the connecting pipe 109 and the hose body 108 are integrally formed. Since the screw 161 is screwed along the bellows structure of the hose body 108 when the connection pipe 109 outer periphery side is screwed into the inner periphery side of the hose body 108, workability can be improved.

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

  FIG. 15 is a cross-sectional view showing a state in which the hose body 108 and the connecting pipe 109 are integrally molded.

  By using a material having a high heat shrinkage rate for the hose body 108, the gap between the hose body 108 and the connecting pipe 109 as shown in FIG. 15 that is normally used is not airtight using the airtight member 112 or the adhesive 113. The end of the hose body 108 can be shrunk by heat at the time of integral molding, and can be brought into close contact with the outer peripheral side of the connecting pipe 109 to be airtight. Thereby, the number of parts can be reduced and the airtightness can be improved.

  The hose body 108 is made of a material having a contraction rate higher than the thermal contraction rate of the connecting pipe 109, and is more airtight and has no problem in appearance and performance.

It is sectional drawing of the hose which concerns on 1st embodiment of this invention. It is sectional drawing of the local connecting pipe which concerns on 1st embodiment of this invention. It is sectional drawing of the main body side connecting pipe which concerns on 1st embodiment of this invention. It is an external view in the conventional flexible hose. It is the external view which connected the suction hose, the extension pipe | tube, and the suction inlet to the vacuum cleaner which can apply the suction hose of this invention. It is a top view of the external appearance of the vacuum cleaner which can apply the suction hose of this invention. It is a longitudinal cross-sectional view of the vacuum cleaner which can apply the suction hose of this invention. It is a horizontal sectional view of the vacuum cleaner which can apply the suction hose of the present invention. It is sectional drawing of the hose which concerns on 1st embodiment of this invention. It is sectional drawing of the hose which concerns on 1st embodiment of this invention. It is sectional drawing of the hose which concerns on 1st embodiment of this invention. It is sectional drawing of the hose which concerns on 2nd embodiment of this invention. It is sectional drawing of the hose which concerns on 3rd embodiment of this invention. It is sectional drawing of the hose which concerns on 4th embodiment of this invention. It is sectional drawing of the hose which concerns on 5th embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 ... Vacuum cleaner, 101 ... Vacuum cleaner main body, 102 ... Suction hose, 103, 104 ... Extension pipe, 108 ... Hose body, 109 ... Connection pipe, 110 ... Hand operation pipe, 120 ... Main body connection pipe.

Claims (6)

In the suction hose in which the connecting pipe is connected to at least one end of the hose body,
A suction hose characterized by being integrally formed with the outer peripheral side of the connecting pipe disposed on the inner peripheral side of the hose. In claim 1,
A suction hose characterized in that a hose cover member covering the integrally formed portion is disposed on the outer periphery of the integrally formed portion, and the hose cover member is integrally formed with the integrally formed portion. In claim 1,
A suction hose characterized in that a lead wire and a terminal portion connected to the lead wire are disposed in the hose body, and the lead wire, the terminal portion, and the connecting pipe are insert-molded. In claim 1,
A suction hose characterized in that an uneven portion is provided on at least a part of the connecting pipe on the hose body connecting portion side. In any one of Claims 1-4,
A suction hose characterized by using a hose member having a heat shrinkage rate higher than that of the connecting pipe. The vacuum cleaner provided with the suction hose in any one of Claims 1-5.

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