JP2926074B2 - Electric vacuum cleaner - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vacuum cleaner having a floor nozzle (power nozzle) having a built-in rotating brush driven by an electric motor, and communicating between the cleaner body and the floor nozzle. It's about hoses. 2. Description of the Related Art A conventional power supply cord is internally provided in a hose of this type to supply power to a power nozzle.
As shown in the drawing, a hose connecting pipe 2 having a hand switch 1 for starting and stopping a power nozzle, and a cleaning grip 3
And the tip pipe 4 provided with the one end of the hose 5. Then, electricity was sent from the hose 5 to the hose joining pipe 2 and the end pipe 4. At the other end of the hose 5, a connecting portion 6 is provided for electrically connecting the hose 5 to the cleaner body. The tip pipe 4 can be electrically connected to the extension pipe 7. Problems to be Solved by the Invention As described above, in order to supply electricity to the power nozzle, the hose connecting pipe 2 and the tip pipe 4 having the cleaning grip portion 3 are integrally fixed. 2,4
During that time, it became free to rotate. Therefore, when the hose 5 is connected to the cleaner body with the connection portion 6 twisted,
The hose 5 remains twisted, and the hose 5 is not stretched, which is inconvenient. Further, even in a normal state where the hose 5 is not twisted, it is necessary to change the position of the vacuum cleaner in accordance with a cleaning location when holding the tip pipe 4 for cleaning. If it is attempted to add, there is a problem that the returning force acts due to the repulsive force of the hose 5 and cleaning is difficult. An object of the present invention is to solve such a problem, and an object of the present invention is to provide an easy-to-use vacuum cleaner hose in which a torsional force is not applied to a tip pipe during use. Means for Solving the Problems The present invention relates to a cleaner body, a hose provided with a power cord for guiding dust-containing air sucked from a floor nozzle to the cleaner body and supplying electricity to the floor nozzle, and a hose having the same. A joining pipe joined to one end of the joint pipe; and a tip pipe rotatably connected to the joining pipe. At a joint between the joining pipe and the tip pipe, a plurality of contact points are provided on an outer periphery of the tip pipe. A case that covers the plurality of contacts that are in contact with the plurality of contact rings through the openings. It is attached to the inner surface of. Operation With this configuration, the tip pipe having the cleaning grip and the joining pipe joined to the hose are rotatably connected to each other in an electrically conductive state. When turning, only the tip pipe and the joining pipe rotate, the repulsive force (elasticity) of the hose is not directly applied to the tip pipe as in the prior art, and the usability is improved. In addition, since the plurality of contacts are attached to the inner surface of the case, the contacts can be removed simultaneously when the case is removed from the pipe, and it is easy to check the dirt condition of the contacts and the contact ring and clean them. Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1 to 4, reference numeral 11 denotes a hose, a power cord 12 is helically embedded, a hose connecting pipe 13 is provided at one end of the hose 11, and a hose is provided at the other end.
A connection portion 14 is provided for electrically connecting 11 to the cleaner body side. Reference numeral 15 denotes a distal end pipe having a cleaning grip portion 16, which is fitted into one end of the hose joining pipe 13 and is connected rotatably. For details, hose joint pipe
Two annular grooves 18 separated from each other by insulating ribs 17 are formed on the outer peripheral surface of one end of the tip pipe 15 fitted into one end of the pipe 13.
a, 18b are formed, and contact rings 19a, 19b are provided inside the grooves 18a, 18b, respectively. One end of a lead wire 20a, 20b is connected to each of the contact rings 19a, 19b, and the lead wires 20a, 20b pass between the distal end pipe 15 and the internal pipe 21 mounted inside the distal end pipe 15, and the other ends. The end is connected to a connector 22 provided at the other end of the tip pipe 15. The connector 22 is connected to a connection pin 24 on one end of an extension tube 23 in which a power cord is embedded. Reference numeral 25 denotes a hand switch, a knob 27 swingably provided on a hand case 26 attached to the outside of the hose connecting pipe 13, and a pair of sliding terminals attached to the knob 27 and sliding simultaneously with the knob 27. 28, a pair of fixed terminals 29 which are always in contact with the pair of sliding terminals 28 and are connected to the power cord 12 of the hose 11, and a pair of sliding terminals 28 by sliding the knob 27.
And a pair of connection terminals 30 that can be switched between contact and detachment. Hose connecting pipe 13 is provided on the inner surface of the hand case 26.
A locking rib 31 is provided to prevent the tip pipe 15 from coming off from the pipe, and the locking rib 31 penetrates an opening 32 provided in the hose connecting pipe 13 and the tip thereof is the tip pipe. 15 is fitted into one groove 18a. On the left and right sides of the locking rib 31, two contacts 33a, 33b, which are elastically pressed against the contact rings 19a, 19b, respectively, are attached,
These contacts 33a, 33b are electrically connected to the pair of connection terminals 30. Therefore, the electricity drawn from the cleaner body to the hand switch 25 through the power cord 12 embedded in the hose 11 through the connection part 14 is used for the hand switch 25.
By turning on, the fixed terminal 29 flows through the sliding terminal 28, the connection terminal 30, the contacts 33a and 33b, the contact rings 19a and 19b, the lead wires 20a and 20b, and is passed from the connector 22 to the extension tube 23, and To a nozzle (not shown). Therefore, the start / stop of the power nozzle is switched by operating the knob 27 of the hand switch 25, and the tip pipe 15 is rotatably connected to the hose joining pipe 13 in an electrically conductive state. . Reference numeral 34 denotes a retaining ring for pressing and fixing the hose 11 to the hose joining pipe 13 with one end of the hose 11 fitted to the other end of the hose joining pipe 13 from the outside. It is located and fixed inside the case 26. A ring 35 is interposed between the outer surface of the end pipe 15 and the inner surface of the hose connecting pipe 13 to prevent air leakage. In the above configuration, since the tip pipe 15 and the hose joining pipe 13 are rotatably connected, the tip pipe 15
If the hose 11 is twisted, for example, the connection part 14 is accidentally rotated once and connected to the cleaner body, or the tip pipe 15 is twisted in accordance with the location to be cleaned Even in this case, only the rotation between the tip pipe 15 and the hose joining pipe 13 is rotated, and no force in the twist direction is applied to the tip pipe 15. Moreover, due to the elasticity of the hose 11, a force for always positioning the hand switch 26 on the hose joining pipe 13 is applied. Therefore, even if the inclination of the tip pipe 15 changes during cleaning, the hand switch 26 always faces upward. Switch operation can be easily performed. Also, the insulating rib 17 is locked by a locking rib 31 having a distal end fitted into one of the grooves 18a of the distal end pipe 15, and serves as a rib for preventing the distal end pipe 15 from coming off, thereby preventing the distal end pipe 15 from coming off. Is simple, the size of the hand switch 25 can be reduced, and it is compact and easy to use. In this embodiment, a contact ring is provided on the tip pipe side and a contact is provided on the joining pipe. However, a contact ring may be provided on the joining pipe side and a contact may be provided on the tip pipe side.
The switch for starting and stopping the power nozzle is illustrated and described, but the switch for starting the cleaner body is a hand switch.
Needless to say, the same effect can be obtained by incorporating it inside the 25. Effects of the Invention As described above, according to the present invention, the tip pipe having the cleaning grip and the joining pipe joined to the hose are rotatably connected in an electrically conductive state, When the hose is twisted or the tip pipe is turned, the tip pipe and the joining pipe just rotate,
Unlike the conventional case, the repulsive force (elasticity) of the hose is not directly applied to the tip pipe, so that the hose is easy to use. Also, since multiple contacts are attached to the inner surface of the case,
When the case is removed from the pipe, the contacts can also be removed at the same time, and it is easy to check the contamination of the contacts and the contact ring and to clean them.

BRIEF DESCRIPTION OF THE DRAWINGS FIGS. 1 to 4 show one embodiment of the present invention.
FIG. 2 is a perspective view of a hose of a vacuum cleaner, FIG. 2 is a vertical sectional side view of a main part, FIG. 3 is a vertical front view of a main part, FIG. 4 is an exploded perspective view of a main part, and FIG. FIG. 2 is a perspective view of a hose of the machine. 11 ... Hose, 12 ... Power cord, 13 ... Hose joint pipe, 14 ... Connection part, 15 ... Tip pipe, 16 ... Cleaning grip part, 17 ... Insulation rib, 18a, 18b ... Groove, 19a, 19b ... Contact Ring, 20a, 20b ... lead wire, 22 ... connector, 25 ... hand switch, 26 ... hand case, 27 ... knob, 28 ... sliding terminal, 29 ... fixed terminal, 30 ... connection terminal, 31 ... locking rib, 33a,
33b ... Contact.

Continuation of the front page (56) References JP-A-61-188553 (JP, U) JP-A-55-91651 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) A47C 9 / 24 A47L 9/28

Claims (1)

(57) [Claims] A cleaner body, a hose provided with a power cord for guiding dust-containing air sucked from the floor nozzle to the cleaner body and supplying electricity to the floor nozzle, a joining pipe joined to one end of the hose, A tip pipe rotatably connected to the joining pipe; a connecting portion between the joining pipe and the tip pipe, a plurality of contact rings provided on an outer periphery of the tip pipe; An electric vacuum cleaner comprising: an opening facing a plurality of contact rings; and a plurality of contacts that are in pressure contact with the plurality of contact rings through the openings, attached to an inner surface of a case that covers the opening.