JPH01310635A - Pipe electric connecting device for electric cleaner or the like - Google Patents

Abstract

PURPOSE:To prevent an over-load from giving to the almost U-shaped central part of a spring material by defining an edge part, which is a contact surface, as an idle edge and for the other edge, providing a space between a back plane surface in the opposite side of the idle edge part in terminal metal fittings, which are spring elastic materials to be fixed by the supporting rib of a holding frame, and the holding frame. CONSTITUTION:The edge part to have the contact surface to be electrically connected is defined as the idle edge and for the other edge, a space part 20 is providing between a back plane surface 19 in the opposite side of the idle edge in terminal metal fittings 16, which are the spring elastic materials to be fixed to a supporting rib 18 of the holding frame. By the insertion of a pipe, a terminal 15 is inserted and elastically contacted to an idle edge part 24 of the terminal metal fittings 16. Then, the terminal 15 is deformed so that a U-shaped interval can be narrowed. At such a time, since the space part 20 is provided between the back plane surface 19 in the opposite side of the idle edge part in the terminal metal fittings 16, which are the spring elastic materials, and the holding frame 17, the deformation and moving of the back plane surface can be executed. Then, since the over-load is prevented from giving to the almost U-shaped central part, the resistance life of an electric connecting part can be extremely improved.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to pipe electrical connection devices such as vacuum cleaners.

BACKGROUND ART FIG. 6 shows an operating pipe 1 in a conventional vacuum cleaner,
The configuration of the connection part with the extension pipe 2 is shown.

In order to electrically connect these pipes, one pipe is equipped with a terminal terminal 3, and the other pipe is equipped with a terminal fitting 4 made of a metal spring elastic material, and the terminal fitting 4 is approximately U-shaped. The end portion having a contact surface for electrical connection is defined as a free end, and the terminal fitting 4 is installed in the holding frame 6 thereof.

The terminal terminal 3 is inserted into the terminal fitting 4 by inserting a pipe so that it comes into elastic contact with the terminal fitting 4. 6 is a buckle that maintains the connection between the operation pipe 1 and the extension pipe 2.

Problems to be Solved by the Invention In the conventional configuration described above, the terminal fitting 4 is approximately U-shaped, and the end having the contact surface for electrical connection is the free end, and the terminal fitting 4 is attached to its holding frame. Since the terminal terminal 3 is inserted into the terminal fitting 4 by inserting the pipe and comes into elastic contact with the terminal fitting 4, the opposite side of the free end of the terminal fitting 4 is The back flat surface 7 and the holding frame 6 are pressurized and the length of the free end of the metal spring elastic material is shortened, which takes away the spring elasticity of the terminal fitting 4 and shortens the durability life due to repeated attachment and detachment of the pipe. Ta.

The present invention solves these conventional problems, and
This significantly increases the durability of the electrical connections.

Means for Solving the Problems In order to achieve the above objects, the present invention provides a method in which the electrically connected contact surface of the terminal fitting is a free end, and the other end is fixed by a support rib of a holding frame. A space is provided between the back flat surface on the opposite side of the free end of the terminal fitting, which is made of elastic material, and the holding frame.

Function In the above configuration, when the second pipe is inserted into the first pipe by fitting internally into the first pipe, a terminal terminal is attached to one pipe and a terminal terminal is attached to the other pipe in order to electrically connect both pipes. It is equipped with a terminal fitting made of a metal spring elastic material, and the terminal fitting is installed in its holding frame, and the terminal fitting is approximately U-shaped and has a contact surface for electrical connection. The free end is the free end, and the other end is fixed to the support rib of the holding frame, leaving a space between the holding frame and the flat back surface of the terminal fitting, which is a spring elastic material, on the opposite side of the free end. Since the terminal terminal is inserted by inserting the pipe and makes elastic contact with the terminal fitting, the U
Transform the characters so that the spacing between them becomes narrower. Therefore, since there is a space between the flat back surface of the terminal fitting and the holding frame, the flat back surface can be deformed and moved, and its effective length as a spring material can be lengthened. This is to prevent excessive overcurrent from being applied to the U-shaped central portion.

Example Examples thereof will be described below with reference to the accompanying drawings.

The pipe electrical connection device in this embodiment is, for example, the fifth
In the vacuum cleaner shown in the figure, a connection part A between the operation pipe 11 and the extension pipe 12, a connection part B between the extension pipes 12 and 13, and a connection part between the extension pipe 13 and the floor nozzle 1v14 and the main body (not shown) ) is used for the connection C between the

The details will be explained using the connection part A as an example.

1 to 4, the extension pipe 12 has a terminal terminal 15, and the operating pipe 11 is equipped with a terminal fitting 16 made of a metal spring elastic material.

The terminal fitting 1B is installed in its holding frame 17, and the terminal fitting 16 is approximately U-shaped, with the end having a contact surface for electrical connection being a free end, and the other end being a holding frame. A space 20 is provided between the holding frame 17 and the back flat surface 19 on the opposite side of the free end of the terminal fitting 16, which is fixed to the support rib 18 of the frame and is made of a spring elastic material.

Further, the fixed end portion 21 of the terminal fitting 16 is provided with a concave portion 23 corresponding to the convex portion 22 provided on the holding frame 17 of the pipe, so that the terminal fitting 16 is securely fixed.

Further, the terminal fitting 16 has a substantially U-shape that opens in the opposite direction of insertion of the terminal terminal 16, and the free end portion 24 thereof is set in an oblique shape.

Reference numeral 25 denotes a buckle that maintains the joint state between the operating pipe 11 and the extension pipe 12, and a buckle cover 26 is provided around the outer periphery of the operating pipe 11.
It is movably attached via.

In the above configuration, the terminal terminal 16 is now inserted by inserting the pipe and comes into elastic contact with the free end portion 24 of the terminal fitting 1e, deforming it so that the U-shaped interval narrows. (
Figures 3 and 4). At this time, since a space 20 is provided between the back flat surface 19 on the opposite side of the free end of the terminal fitting 16, which is a spring elastic material, and the holding frame 17, the back flat surface can be deformed and moved. This prevents excessive load from being applied to the central part of the shape, significantly increasing the durability of the electrical connection.

Further, the fixed end portion 21 of the terminal fitting 16 is engaged with a convex portion 22 provided on the holding frame 17 of the pipe and fixed to the supporting rib 18 of the holding frame, thereby ensuring the fixation of the terminal fitting 16. Terminal terminal 16 and terminal fitting 1e
It is possible to reliably secure the distance from the free end portion 24 of the electrical connection part, and the durability life of the electrical connection part is significantly increased due to the lapping effect of both contact surfaces.

In addition, although this embodiment has taken a vacuum cleaner as an example, it goes without saying that the present invention can also be applied to other electrically connected devices.

Effects of the Invention As described above, according to the present invention, in a removable electrical connection device for pipes, the spring elastic force is appropriately diffused in the terminal fitting connection made of a metal spring elastic material, and the durability against spring fatigue is increased. It is therefore possible to provide an electrical connection device which has a high electrical conductivity on a contact surface and a significantly improved durability.

[Brief explanation of the drawing]

FIGS. 1a and 1b are cross-sectional views of an electrical connection part of a pipe showing an embodiment of the present invention, FIG. 2 is a plan view, and FIG. 3 is a plan view. 4a and 4b are action explanatory views, FIG. 6 is a side view when applied to a vacuum cleaner, and FIG. 6 is a plan view showing a conventional example. 11...First pipe (operation pipe), 12...
Mountain, second pipe (extension pipe), 16... Mountain, terminal terminal, 16... Terminal fitting, 17... Mountain, holding frame, 18... Support rib, 2o...・・・
・Space section. Name of agent: Patent attorney Toshio Nakao and one other person If
・-1st pipe 1 12-・-2nd H1 0 15- Terminal terminal No. l Figure 16...-Terminal fitting (a) /Z 1 /1 (b) f6-゛-Derminal fitting I7-Building sign Tsubotomi 2 figure I8- Bunn hand so 7 O3゜ ″”°2N′帥lgutj Figure 4! 4 Figure 6 f

Claims (2)

[Claims] (1) Electrical connection between a first pipe, a second pipe fitted into the first pipe, and one of which is made of a metal spring elastic material in order to electrically connect these first and second pipes. The metal spring elastic material has a substantially U-shape, and has an end having a contact surface for electrical connection as a free end;
The other is fixed via a support rib, and a space is provided between the back flat surface on the opposite side of the free end of the metal spring elastic material and the fixed support rib, such as a vacuum cleaner. Connection device. (2) A pipe electrical connection device for a vacuum cleaner or the like according to claim 1, wherein the metal spring elastic material has a locking portion provided corresponding to the fixed support rib.