JPH0576469A - Hose connection tube for vacuum cleaner - Google Patents

Abstract

(57) [Summary] [Purpose] In a hose connection pipe for a vacuum cleaner, the rotation angle of the connection pipe is changed without bending the mouth portion, and the length of the mouth portion is shortened to provide a simple structure. [Composition] A front downward slope 1a formed on the cleaner body 1
A hose connecting pipe is rotatably connected to the insertion port 2 such as.
The hose connecting pipe includes a straight tubular mouth portion 3 connected to the insertion port 2, a bellows-shaped hose 13 connected to the mouth portion, a split cover case 16 that is bent and divided in the longitudinal direction.
a and 16b. The mouth portion 3 and the hose 1
By accommodating the connection part of No. 3 in the split cover cases 16a and 16b, the hose 13 is bent without using a bent mouth part. In order to increase the cross-sectional area of the air passage, the mouth portion and the hose may be integrally formed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose connecting tube for a vacuum cleaner, which has a mouth portion to be mounted on an electric vacuum cleaner and a bellows-shaped hose.

[0002]

2. Description of the Related Art As an electric vacuum cleaner, Japanese Patent Laid-Open No. 62-114518 discloses a vacuum cleaner having a difference formed on an upper surface of a cleaner main body which is inclined toward the front. The hose is provided with an inlet and a bent opening formed at one end of the hose, and the hose is rotatable in the circumferential direction about a rotation axis in a direction substantially orthogonal to the inclined surface with respect to the cleaner body. An electric vacuum cleaner has been proposed. In this electric vacuum cleaner, since the mouth portion having the bent portion is oriented in the horizontal direction and the vertical direction as the hose is rotated, it can be rotated by 360 ° and a wide range from high places to low places can be cleaned.

However, if the height of the mouth portion is higher than that of the main body of the vacuum cleaner, the fall of the main body of the cleaner may cause the mouth portion to collide with the floor surface and be damaged.

Japanese Examined Patent Publication No. 64-6783 proposes an electric vacuum cleaner having a structure similar to that described above, in which the height of the mouth from the floor is smaller than the height of the main body of the cleaner. Further, Japanese Patent Laid-Open No. 63-252123 discloses a two-part cover case for covering an L-shaped mouth portion connected to a bellows-shaped hose, and a retaining clamp provided on the cover case for attachment and detachment. An electric vacuum cleaner equipped with is proposed.

However, the mouth portions disclosed in these prior arts are all bent. For this reason, blow molding is used to mold the mouth portion so that the bent shape can be easily made, but the shape becomes complicated and a screw boss or the like cannot be formed. Further, during injection molding of the mouth portion, it is necessary to insert the bent core into the mold, but since the core is bent, the core cannot be pulled out from the mold when demolding. .. Therefore, a complicated forming process is required.
Furthermore, since the rotation range of the mouth portion, and thus the range in which cleaning is possible, depend on the angle of the inclined surface of the cleaner body and the degree of bending of the mouth portion, the shape of the cleaner body is changed and the rotation angle of the mouth portion is changed. It is necessary to mold the mouth portions having different angles for each. Therefore, the moldability and productivity of the mouth portion are reduced.

Further, since the mouth portion is bent, the entire length of the mouth portion becomes large, the operability of attachment / detachment to / from the insertion port of the cleaner body is deteriorated, and the connecting portion between the mouth portion and the hose is reduced. The length of the cover case that protects the inevitable must also be increased. In addition, since the mouth portion is bent and the length is long, the electric signal wiring is likely to be displaced during the assembling work of the hose connecting pipe, and the electric signal wiring may be sandwiched between the left and right split cover cases and may be disconnected. The assembly workability is reduced.

Furthermore, since the end of the mouth is usually inserted into the hose and the two are bonded together, the cross-sectional area of the air passage, which greatly affects the suction function of the vacuum cleaner, is reduced. for that reason,
Smooth suction is impaired.

Therefore, an object of the present invention is to provide a hose connecting pipe for a vacuum cleaner having a simple structure in which the turning angle of the hose connecting pipe can be changed without bending the mouth portion and the length of the mouth portion can be shortened. To do.

Another object of the present invention is to provide a hose connecting pipe for a cleaner, which is excellent in operability of attachment / detachment to and from an insertion opening of a cleaner body and assembling workability.

Still another object of the present invention is to provide a hose connecting pipe for a vacuum cleaner which can increase the cross-sectional area of a ventilation path.

[0011]

In order to achieve the above-mentioned object, the present invention is a connecting pipe connected to an insertion port formed in a cleaner body, and is rotatably connected to the insertion port. A straight tubular mouth portion, a bellows-shaped hose connected to the mouth portion, and a portion including a connecting portion between the mouth portion and the hose are accommodated, bent, and divided in the longitudinal direction. A hose connection tube for a vacuum cleaner, which includes a cover case. It is preferable that the mouth portion and the hose are integrally molded.

[0012]

In the present invention, by utilizing the flexibility of the bellows-shaped hose, the hose is bent not by the mouth but by the split cover case. That is, even if the mouth portion has a straight tubular shape, the hose bends according to the degree of bending of the cover case by accommodating the connection portion between the mouth portion and the hose in the bent cover case. In addition, since the mouth portion is in the shape of a straight tube, it is possible to improve molding workability and mass productivity. Further, the length of the mouth portion may be any length as long as it does not damage the attachment of the cleaner body to the insertion opening and the cover of the split cover case. Further, since the mouth portion is straight tube-shaped, the assembling workability can be improved.

When the mouth portion and the hose are integrally formed, the number of connecting steps can be reduced, and the inner peripheral surfaces of the hose and the mouth portion can be formed to be flush with each other, so that the cross-sectional area of the air passage does not become small. In addition, disconnection and poor connection do not occur.

[0014]

Embodiments of the present invention will now be described in more detail with reference to the accompanying drawings.

FIG. 1 is a partially cutaway side view showing a hose connecting pipe according to an embodiment of the present invention, FIG. 2 is a partially cutaway plan view showing the hose connecting pipe of FIG. 1, and FIG. FIG. 4 is a perspective view showing a portion, and FIG. 4 is a schematic view showing an electric vacuum cleaner using the hose connecting pipe of FIG.

As shown in FIG. 4, the vacuum cleaner hose connecting pipe is provided at an insertion port 2 formed in an inclined surface 1a of the vacuum cleaner main body 1 which is inclined downward toward the front. Cylindrical mouth portion 3 rotatably inserted and connected, and the mouth portion 3
A bellows-shaped hose 13 integrally connected with the mouth portion 3
And a cover case 16a, 16b which is divided into left and right parts and which accommodates at least a connecting portion with the bellows-shaped hose 13.

As shown in FIGS. 1 and 2, the mouth portion 3 is formed in a straight tube shape in order to simplify the structure and enhance the molding workability. A holding portion 6 for holding the pair of terminals 4 and 5 is formed on the mouth portion 3. The terminals 4 and 5 are connected by leads 7 to two core wires 14 and 15 embedded in the bellows-shaped hose 13.

An engagement clamp 8 is provided between the mouth 3 and the cover case 16a. The engagement clamp 8 includes an operation portion 9 located at the opening of the cover case 16a and a ring-shaped member (not shown) rotatably arranged in the insertion opening 2 of the cleaner body 1. It is composed of a claw 10 that can be engaged with a mating portion (not shown). By engaging the claw 10 of the engagement clamp 9 with the ring-shaped member, the mouth portion 3 is rotatable in the circumferential direction with the direction substantially orthogonal to the inclined surface 1a of the cleaner body 1 as the rotation axis. is there. The operation section 9
A spring 12 is disposed between the inner surface of the cover 11 and the holding seat 11, and both sides of the bottom surface of the engagement clamp 8 are engaged with engagement pieces (not shown) extending from the cover case 16a. is doing. Therefore, the engagement clamp 8 moves back and forth around the engagement piece as a fulcrum by the urging force of the spring 12 as the operation portion 9 is pressed or released.

In this embodiment, one end of the mouth portion 3 and one end of the bellows-shaped hose 13 are inserted into the bellows-shaped hose 13 with the ends of the mouth-shaped portion 3 coated with an adhesive. Are connected by.

Then, the cover cases 16a, 16b
In order to protect the connection between the mouth portion 3 and the hose 13, etc., is made of a material having rigidity and high mechanical strength, and is curved at a predetermined angle. Further, the cover cases 16a and 16b can be joined to each other. That is,
As shown in FIG. 3, a recess 17 is formed on the inner surface of one end of the cover case 16b, and a claw 18 is formed in the recess 17. In addition, the other cover case 16
In a, a projection piece 19 having a hole 20 that engages with the pawl 18 is provided.
Are formed. Furthermore, a pair of cover cases 16
a and 16b are a screw boss 21 formed on the mouth portion 3,
Using the through holes 22 formed in the cover cases 16a and 16b, the screws 23 are tightly fastened.

As shown in FIG. 4, the hose connecting pipe for a vacuum cleaner has an extension pipe 25 attached to an operating portion 24 which is connected to an end portion of the bellows-shaped hose 13 and which includes an operating switch.
And the floor nozzle 26 are sequentially connected. Further, since the mouth portion 3 is rotatably inserted and connected to the insertion port 2 and the cover cases 16a and 16b are bent, the hose connecting pipe can be rotated 360 °, and the front, rear, left, right, and high positions can be increased. Can clean a wide area over low places.

In such a vacuum cleaner hose connecting pipe, the curved cover case 16 is provided even if the mouth portion 3 is a straight pipe.
When the mouth part 3 and a part of the hose 13 are housed in a and 16b and the cover cases 16a and 16b are fastened, the hose 13 bends according to the degree of bending of the cover cases 16a and 16b. Therefore, the shape of the cleaner body 1 and the inclined surface 1a
Even if the angle is changed, it is possible to deal with the change in the rotation angle of the hose connecting pipe simply by changing the bending angles of the cover cases 16a and 16b. Moreover, since the mouth part 3 is a straight tube,
Moldability and productivity of the mouth portion 3 are also high. That is,
The mouth portion is formed with a holding portion for the terminals 4, 5 and a holding seat 11 for a spring, and the shape thereof is complicated. Therefore,
The straight tube-shaped mouth portion 3 has remarkably high moldability and productivity as compared with the conventional mouth portion bent in the shape of a hollow cylinder.

Further, the length of the mouth portion 3 can be shortened as compared with the conventional mouth portion which is curved. That is, the conventional curved portion at the mouth portion is unnecessary, and the length of the mouth portion 3 is such that the cleaner body 1 is attached to the insertion opening 2 and the cover by the cover cases 16a and 16b is not damaged. I wish I had it. Further, as the length of the mouth portion 3 can be shortened, the length of the cover cases 16a and 16b for protecting the connecting portion between the mouth portion 3 and the hose 13 can also be reduced. Therefore, the hose connecting pipe can be downsized and the structure is simple.

Further, since the mouth portion 3 has a straight tubular shape, the lead 7 is less displaced than the curved mouth portion,
Since the mouth portion 3 can be easily inserted into the hose 13, the work of connecting the terminals 4 and 5 to the core wires 14 and 15 and the work of connecting the hose 13 and the mouth portion 3 are easy, and the assembling workability is improved. be able to.

The connection structure between the mouth portion and the hose is not particularly limited, and a hose may be mounted inside the mouth portion for connection. The inner diameter of the mouth and hose is designed to smoothly suck
It is preferable that they are substantially the same.

FIG. 5 is a partially cutaway side view showing a hose connecting pipe according to another embodiment of the present invention. The same elements as those of the hose connecting pipe shown in FIGS. 1 to 3 are designated by the same reference numerals and described.

In this example, the end of the mouth portion 31 and the end of the bellows-shaped hose 32 are integrally molded by injection molding. Molding is performed by, for example, the mouth portion 31.
The terminals 4 and 5 and the core wires 14 and 15 embedded in the bellows-shaped hose 32 are connected by the leads 7, and the mouth portion 31
This can be performed by integrally molding and the bellows-shaped hose 32. For the integral molding method of the mouth portion 31 and the hose 32, reference can be made to JP-A-55-118728.

When the mouth portion 31 and the hose 32 are integrally molded, the number of connecting steps can be greatly reduced. Further, the inner peripheral surfaces of the mouth portion 31 and the hose 32 can be formed flush with each other, and the inner diameters can be formed to have the same diameter. Therefore, compared with the case of inserting the mouth part into the hose,
The cross-sectional area of the air passage through which air passes becomes large, and the suction efficiency can be improved. Further, in the case where the mouth portion 31 and the hose 32 are integrally molded, disconnection and connection failure will not occur.

The connecting structure between the mouth portion and the insertion port may be any structure as long as the mouth portion can be rotatably connected. For example, as disclosed in Japanese Utility Model Laid-Open No. 49-73262, It may be configured by a spherical body rotatably held in the cleaner body, a hole formed in the spherical body, and a mouth portion which can be connected to and communicate with the hole. In addition, actual public Sho 51-3462
As disclosed in Japanese Unexamined Patent Publication No. 2 (1994), an opening formed in a cleaner body, an intermediate ring pivotally supported by the opening and rotatably provided about the shaft, and the intermediate ring. , A base pipe having a spherical portion rotatably supported at a position orthogonal to the shaft, the mouth portion of which is connected for communication, and the base pipe and an intake chamber in the cleaner body are connected for communication. You may comprise with a flexible hose.

The cover case does not have to be divided into two parts on the left and right sides, and may be divided in the longitudinal direction. The number of divisions is not particularly limited, but it is preferably divided into two.
Further, in the split cover case, the abutting surfaces may be formed in a concavo-convex shape.

Further, the divided cover cases are joined together by various joining means such as connecting claws or screws formed at the joining end portions of the respective cover cases without joining the divided cover cases to the mouth portion. You may.

The cover case may be any one as long as it accommodates and covers a portion including a connecting portion between the mouth portion and the hose. Such a cover case does not impair the operability of attaching / detaching the mouth portion to / from the insertion opening of the cleaner body, protects the lead between the mouth portion and the hose, and connects the mouth portion to the hose. Protect.

The cover case may have any length as long as the hose can be bent at a predetermined angle depending on the length of the connecting portion between the mouth portion and the hose, the type of the hose, and the like. The central portion of the cover case in the longitudinal direction is preferably located at the connecting portion between the mouth portion and the hose. In this case, the operability of the mouth portion can be improved and the connection portion between the mouth portion and the hose can be protected without lengthening the cover case.

The bending angle of the cover case can be selected according to the angle of the inclined surface of the cleaner body and the desired range of rotation of the hose connecting pipe. For example, when the inclination angle of the inclined surface with respect to the horizontal plane is 35 to 75 °, the bending angle of the mouth portion is preferably about 115 to 155 °.

The hose connection pipe of the present invention can be connected not only to the insertion port formed on the front downward slope of the cleaner body, but also to the insertion port formed on the other part of the cleaner body. The case of connecting to such an insertion port is also included in the scope of the present invention.

[0036]

According to the hose connecting pipe of the present invention, since the mouth portion and a part of the hose are housed in the bent split cover case and the hose is bent, the hose connecting pipe is not bent. The rotation angle can be changed and the length of the mouth portion can be shortened, and the structure of the hose connection pipe for the vacuum cleaner is simple. Further, since the mouth portion has a straight tube shape and the length thereof can be shortened, the operability of attaching / detaching to / from the insertion port of the cleaner body and the assembling workability are excellent.

Further, when the mouth portion and the hose are integrally molded, the cross-sectional area of the air passage can be increased and
The number of connection steps can be reduced, and there will be no disconnection or connection failure.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing a hose connecting pipe according to an embodiment of the present invention.

2 is a partially cutaway plan view showing the hose connecting pipe of FIG. 1. FIG.

FIG. 3 is a perspective view showing a part of a split cover case.

FIG. 4 is a schematic view showing an electric vacuum cleaner using the hose connection pipe of FIG. 1.

FIG. 5 is a partially cutaway side view showing a hose connecting pipe according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner main body 1a ... Sloping surface 2 ... Insertion port 3,31 ... Mouth part 13, 32 ... Hose 16a, 16b ... Divided cover case

Claims (2)

[Claims] 1. A connection pipe connected to an insertion port formed in a cleaner body, the straight pipe having a straight pipe rotatably connected to the insertion port, and connected to the throat. A hose connection pipe for a cleaner, which comprises a bellows-shaped hose and a split cover case that accommodates a portion including a connection portion between the mouth portion and the hose and that is bent and divided in the longitudinal direction. 2. The hose connection pipe for a vacuum cleaner according to claim 1, wherein the mouth portion and the hose are integrally formed.