JP2753299B2 - Electric vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION The present invention relates to a hose connecting portion of a vacuum cleaner having good contact piece assemblability and improved reliability.

[Conventional technology]

In a conventional hose connection portion of a vacuum cleaner in which a contact piece is sandwiched between upper and lower connection bodies, the contact piece is held in a deep box-shaped rib provided in the lower connection body, and an upper surface opening of the box-shaped rib is provided. The part was held down by the upper connector. Related devices of this type include, for example,
No. -92356.

[Problems to be solved by the invention]

According to the above prior art, the holding portion of the contact piece is formed in a box shape by a high rib. In order to hold the contact piece on the box-shaped rib, it is necessary to partially hold the contact piece in the box-shaped rib and hold it, and to push the contact piece into the rib with a finger. At this time, when the contact piece is pushed with a relatively strong force, an excessive force is sometimes applied to the contact piece to cause deformation or the like, which also causes an inability to assemble or a decrease in contact pressure.

In addition, the hose is mainly held by the upper connection body, and the contact piece is mainly held by the lower connection body, and the relative position between the contact pin and the contact piece is greatly affected by variation,
As the contact piece is held by a long rib as long as the entire length of the contact piece, the tip of the rib is deformed when the contact pin is inserted into the connected state, and the relative position between the contact pin and the contact piece is further deviated, causing contact. The state was unstable and the reliability was low.

An object of the present invention is to improve the assemblability, reduce defects caused by the assemblage, and improve the credibility of a connection portion.

[Means for solving the problem]

In order to achieve the above object, the present invention is characterized in that a dust collecting chamber communicating with an electric blower is provided in a main body case, and a lid for opening and closing an opening of the dust collecting chamber is provided. Has a hose connection part communicating with the dust collection chamber, the hose connection part is composed of an upper connection body and a lower connection body, and the lower connection body is opened upward and has a hose-side contact pin. A first box-shaped rib that covers a substantially lower half of the contact piece to be electrically connected is formed, and the upper connection body is opened downward and substantially faces the lower connection body. A second box-shaped rib covering the upper half is formed, and the contact piece is sandwiched between the first box-shaped rib and the second box-shaped rib from above and below.

[Action]

In the hose connection part of the vacuum cleaner constituted by the upper and lower connecting members, the above-mentioned structure allows the contact piece to be merely mounted on the shallow box-shaped rib formed on the lower connecting member during assembly. Often, there is no need to push hard into the box-shaped ribs. The upper part of the contact piece (the side where the contact pin is inserted)
Has a structure in which it is received by the box-shaped ribs formed on the upper connection body, so that the contact pieces can be tightly clamped by the upper and lower box-shaped ribs. Furthermore, even when the contact pins are connected, the contact pieces are sandwiched by box-shaped ribs from above and below, and are held near the base of the ribs, so there is little deformation of the ribs and the connection between the contact pieces and the contact pins is stable. I do.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS.

In the drawings, reference numeral 1 denotes a vacuum cleaner main body, and an electric blower 2.
And a dust collecting chamber 3 communicating therewith. The dust collecting chamber 3 is provided with an opening / closing lid 4, and the opening / closing lid is provided with a hose connection portion 5 to which a hose can be attached and detached. A rib 7 formed inside the opening / closing cover 4 and the partition plate 6 are disposed between the partition plate 6 and the dust collecting chamber opening / closing lid, which communicate with each other at the center to hermetically isolate the outside and the dust collecting chamber. It is rotatably held by the annular rib 8.

The hose 9 has a bellows hose 11 fixed to a bent tube 10. A substantially annular holder 12 is formed in the vicinity of the joint between the bent pipe 10 and the hose connection device, holds a connection pin 13, and is covered by a cover 14.

The hose connection portion 5 has a cylindrical guide pipe 15 at the center thereof for fitting the hose bend tube 10, and a pair of guide recesses 16 and connection recesses 17 provided on the upper surface (outside), respectively. Is provided with a through hole 18 at a position corresponding to the connection pin 13 of the hose 9, and a disc 20 provided with a box-shaped rib 19 around the through hole 18 on the lower surface (inside). An upper connecting body 21 and a cylindrical outer peripheral portion 23 on which a slip ring 22 is disposed.
A bottom plate 27 having a box-shaped rib 25 and a height-adjusting rib 26 at positions corresponding to the box-shaped ribs of the upper connection body, wherein an annular slip ring 24 is provided on the lower surface and the cross-section is step-shaped. A lower connecting member 29 having a center portion and a fitting pipe 28 fitted to the outside of the guide pipe 15 of the upper connecting member, and an inner connecting portion sandwiched by the upper connecting member and the lower connecting member. Holding part
Packing with 30 and conical lip 31 on the outermost part
32, and a metal such as a phosphor bronze plate sandwiched between the box-shaped ribs 19 and 25. The upper connecting body 21 and the lower connecting body 29 are fixed by screws 34.

The contact piece 33 is a box-shaped rib provided integrally with the lower connector 29.
At 25, a box-shaped rib 19 in which a substantially lower half of a substantially U-shaped base is held and a substantially upper half is provided integrally with the upper connector 21.
Are held in the same manner.

Next, the operation will be described. When the hose 9 is inserted into the hose connection portion 5 for cleaning, the straight portion of the bent tube 10 is fitted inside the guide pipe 15 and the contact pin 13 penetrates as shown in FIG. The contact piece 33 is deformed and expanded so as to penetrate the hole 18 and is connected, so that the hand portion (not shown) of the hose and the cleaner body are electrically connected.

 According to the present embodiment, the following effects are obtained.

(1) While the box-shaped rib 25 of the lower connector 29 has a length that holds the entire length of the contact piece 33 in the conventional example, the present embodiment has a length that holds the substantially lower half of the contact piece 33. When the contact piece 33 is assembled between the box-shaped ribs 25 at the time of assembly, there are two operations in the conventional example: an operation of lightly pressing the contact piece between the box-shaped ribs 25 and an operation of strongly pressing the contact piece from above. However, in this embodiment, a strong pushing operation is not required, so that the working time can be reduced, the fatigue of the worker can be reduced, etc. In addition, the deformation of the contact piece at the time of the strong pushing can be prevented. The performance is also improved. Further, the contact piece 33 has an effect of positioning when the upper connector 21 and the lower connector 29 are combined. (2) In the actual use state, the connecting pin 13 is connected to the contact piece 33. At this time, the contact piece 33 applies a force to push the box-shaped ribs 19 and 25 from inside to outside, and the force is The maximum value is obtained in the vicinity of the upper end of the piece 33. In the conventional example, this portion was pressed by a rib protruding from the lower connector, whereas in the present embodiment, the box-shaped portion formed on the upper connector 21 was used. Since the rib 19 is pressed, a force can be received at the root of the box-shaped rib 19, so that deformation is reduced and reliability is improved. In addition, since the height of the box-shaped rib 25 of the lower connection body can be reduced, the dimensional tolerance between the ribs due to the draft angle,
The thickness tolerance of the ribs can be minimized, and the optimum dimensions can be set to hold down the contact piece 33, thereby improving the reliability and workability. (3) Since the box-shaped rib 19 for fixing the contact piece 33 is formed on the upper connection body 21, the distance between the through-hole 18 of the connection pin and the contact piece 33 becomes constant, and the variation due to the product can be reduced, thereby improving reliability. Can be improved. (4) By providing the box-shaped rib 19 near the connection pin through hole 18 of the upper connection body 21, the rigidity of the upper connection body can be increased, and the deformation at the time of disconnecting and inserting the hose can be reduced. (5) Since the guide pipe 15 of the upper connection body is formed integrally with a part of the box-shaped rib 19, the box-shaped rib 19
The thickness of the guide pipe is increased by the thickness of the guide pipe. Thereby, a large corner R or chamfer can be applied to the upper end of the guide pipe, and connection of the hose 9 becomes easy.

〔The invention's effect〕

As described above, according to the present invention, it is possible to provide a vacuum cleaner having improved assemblability, reduced defects caused by the assemblage, and improved reliability of the connection portion.

[Brief description of the drawings]

FIG. 1 is an enlarged view of a state where a hose is connected to a hose connection portion of the vacuum cleaner according to one embodiment of the present invention, FIG. 2 is an enlarged view of only the hose connection portion, FIG. 3 is a bottom view of the upper connection body, FIG. 4 is a plan view of the lower connector, FIG. 5 is an exploded perspective view, and FIG. 6 is a view showing a vacuum cleaner main body. DESCRIPTION OF SYMBOLS 1 ... Vacuum cleaner main body, 2 ... Electric blower, 3 ... Dust collection room, 4
... lid, 5 ... hose connection, 19, 25 ... box-shaped rib, 21 ... upper connection, 29 ... lower connection, 33 ... contact piece.

 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-63-252123 (JP, A) JP-A-1-86951 (JP, U) JP-A-63-88261 (JP, U) JP-A-1 76751 (JP, U) 1-72850 (JP, U) 1-76752 (JP, U) 61-92356 (JP, U) 1-108256 (JP, U)

Claims (1)

(57) [Claims] 1. A dust collecting chamber communicating with an electric blower is provided in a main body case, and a lid for opening and closing an opening of the dust collecting chamber is provided. The lid has a hose connection communicating with the dust collecting chamber. The hose connection part is composed of an upper connection body and a lower connection body. The lower connection body has a substantially lower half of a contact piece that opens upward and is electrically connected to a hose-side contact pin. A first box-shaped rib is formed on the upper connection body, the second box-shaped rib being opened downward and covering substantially the upper half of the contact piece facing the lower connection body. A vacuum cleaner wherein the contact piece is sandwiched between the first box-shaped rib and the second box-shaped rib from above and below.