JPS5920042B2 - telescopic pipe - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a telescoping pipe used in a stand plastic hair dryer or an electric fan, etc., and has a simple friction mechanism for telescoping.
This is a cheaper and improved version of the sword.

Conventionally, a telescopic pipe that supports a heavy object has a steel ball and a spring 7 inside the pipe, and is re-slided by friction between the pipe and the steel ball, but the mechanism is complicated and assembly is not easy.

Furthermore, the precision of the parts is also required and the prices are high.

Some simple types slide due to the friction between the pipes, but they have the disadvantage that they cannot support heavy objects.

The present invention solves these conventional problems, and embodiments thereof will be described below with reference to the accompanying drawings.

In the figure, g is a fixed pipe, 2 is a movable pipe installed on the fixed pipe 1 so that it can be moved up and down, 3 is the lower part of the spring case attached to the fixed pipe 1, 4 is the upper part of the spring case integrated with the lower spring case 3, and 5 is the movable pipe 2 The main body of a hair dryer etc. is attached to the upper end, 6 is the base attached to the lower end of the fixed pipe 1,
Reference numeral 7 denotes a plate-shaped member fixed between the upper and lower parts 3 and 4 of the spring case, and has a wedge-shaped notch 7' in the longitudinal direction at the center.

Reference numeral 8 denotes a cylindrical spring member mounted above the movable pipe 2, which has flanges J37f facing each other at both ends, and the lower end of the flange 8' is bent inward.

9 is a friction member sandwiched between the spring member 8 and the movable pipe 2.

The friction member 9 and the spring member 8 are integrated by fitting protrusions 10 and holes 11 provided on each member.

Next, the operation of the above configuration will be explained.

First, when lowering the movable pipe 2, the spring member 8 also lowers together with the movable pipe 2, and the flange 8' of the spring member 8 sinks into the wedge-shaped notch 1' of the member 7 fixed to the upper spring case 4, lowering the movable pipe 2. The action of the tightening friction member 9 increases the resistance.

At this time, since the lower end of the 7 flange 8' of the spring member 8 is bent inward, the flange 8' is inserted into the notch 7' of the member 7.
This allows for smoother insertion (Fig. 4A).

Therefore, a large force is required when lowering the movable pipe 2.

Further, when the movable pipe 2 is raised, the spring member 8 is also raised together with the movable pipe 2 (FIG. 4B).

Since the flange 8' of the spring member 8 is located above the notch 7' of the member γ, the tightening force is weak, and the resistance of the friction member 9 is also small, so that when raising it, it can be raised with a small force.

In this case, when the movable pipe 2 is rising, the spring member 8 abuts against the inner upper surface of the upper spring case 4, so that the flange 8I of the spring member 8 is prevented from rising further. It will not come off beyond the notch 1'.

As explained above, the telescopic pipe of the present invention requires a large amount of force when contracting downward, and can be extended with a small force when extending upward, making it ideal for supporting heavy objects such as hair dryers. .

Also, is the configuration a flange? It is made up of a spring member with a notch and a member with a notch Z, and is extremely simple and reliable compared to conventional ones that use balls etc., and can be obtained at low cost. .

[Brief explanation of the drawing]

Fig. 1 is a side view of a hair dryer using a telescoping pipe according to an embodiment of the present invention, Fig. 2 is a vertical cross-sectional view of a portion that applies friction to the movable pipe, and Fig. 3 is a cross-sectional view of a hair dryer using a retractable pipe according to an embodiment of the present invention. A sectional view, FIGS. 4A and 4B are front views for explaining the state of use, and FIG. 5 is an exploded perspective view of the friction member and the spring member. 1...Fixed pipe, 2...Movable pipe, 7...Member, γ'...Notch, 8...
...Spring member.

Claims (1)

[Scope of Claims] 1. A fixed pipe, a movable pipe mounted on the pipe so as to be able to move up and down, and a spring member having flanges 7 that rotate around the pipe on both ends thereof, surrounding the pipe, On the fixed pipe side, a wedge-shaped notch member that is inserted into the flange of the spring member is fixed, and
A telescopic pipe characterized in that a spring case is fixed to prevent the spring member from rising more than necessary. 2. Are the lower ends of the flanges of the spring members curved according to the internal rules? The telescopic pipe according to claim 1, which is expressed as a percentage. 3. The telescopic pipe according to claim 1 or 2, wherein the spring member has a friction member inside thereof.