JPS5856476Y2 - Free arm spring limit device - Google Patents

Description

[Detailed description of the invention] This invention has a base that is pivotally supported so that it can rotate horizontally, a device that is quite heavy such as a large hair dryer is attached to the terminal, and a coil that has elasticity that balances the weight of the device. This invention relates to a device for limiting the spring-up of a free arm, which is provided with a spring inside to allow vertical swinging and stopping at an arbitrary swinging angle.

As illustrated in FIG. 2, the above-mentioned free arm includes a base swivel 2 supported horizontally at the end of the first arm 1 as shown by the arrow, and a mounting pipe 8 with an end mounted vertically protruding from the base swivel 2. Each of the arms 5 has protrusions 3 and 6 with circular side surfaces and vertically cut surfaces on both sides, and fork-shaped pieces 10 and 11 protruding from both ends of the cannula 9, which is the main body of the free arm. A base slider 13 and a terminal slider 14 are attached to the centers of the protrusions 3 and 6 by horizontal shafts 4 and 1, and connected to the sleeve 9 by a connecting rod 12.
and a link 17.21 which is slidably fitted to both ends thereof, and whose inner end is pivotally connected to a shaft 16.20 within a cut groove 15.19 from each outer end surface of the sliders 13 and 14. The respective outer ends of the protrusions 3 and 6 are connected by shafts 18 and 22 at upper portions that are slightly eccentric from the horizontal axes 4 and 7, and one end of the coil spring 24 wound around the connecting rod 12 is connected to the base slider 13. The connecting rod 12 is fixed by a collar 23 which is inflamed in the sleeve 9 nearby, and the other end is connected to the terminal slider 14 or to the connecting rod 12 so as to be functionally integrated with the slider 14.
As shown in FIG. 1, the first arm 1 is attached to the support a, etc. so as to be horizontally pivotable, and the mounting pipe 8 is attached to the mounting pipe 8. After attaching the support part C, it swings vertically about the horizontal axis 4 while keeping the mounting pipe 8 vertical, and the coil spring 24
The system is designed to stop at the required swing position based on the balance between the machine and the equipment.

However, since the equipment is heavy, a coil spring 24 with strong spring elasticity is used. At that time, the coil spring 24 is extended to the maximum and pushes out the terminal slider 14.

However, when the use is finished in the swinging position illustrated in FIG. 1, in which the device is pulled down by the user's hand, and then the device is pushed up and withdrawn upward, the sleeve 9 swings as shown in the dashed line. It may spring up excessively to a height that makes it difficult to reach the equipment when it is to be used again.

The present invention eliminates such drawbacks and also allows the upper limit of the bounce to be changed and set as appropriate, and one embodiment thereof will be described as follows.

That is, the sleeve 9 is provided with a row of insertion holes 31 and 32 arranged in several stages in the axial direction, corresponding to both sides of the link 21 outside the end slider 14, and any one of the insertion holes Pass the stopper pin 33 through.

The stopper pin 33 crosses the inner space of the sleeve 9 and corresponds to the outer end surface of the terminal slider 14.

In the above case, when the cannula 9 is flipped up, the terminal slider 14 hits the stopper pin 33 before it slides the furthest outward, making further outward sliding impossible. Even when pushed up, the free arm's ability to spring up is limited by the pin.

When it is desired to change the upper limit of the flip-up, the stopper pin 33 is inserted into one of the rows of through holes 31 and 32.

The present invention has the above-mentioned configuration and action, and since conventionally there is no device for setting the upper limit of the bounce, there is a tendency for excessive bounce to occur if the front end of the bounce is carelessly pushed up with a strong force and released. By replacing the stopper pin 33, it is possible to arbitrarily and easily restrict the spring-up of the free arm according to the above, and has the effect of further increasing the benefits of using the free arm.

[Brief explanation of drawings]

The attached drawings show one embodiment of the present invention, with FIG. 1 being a schematic side view, FIG. 2 being a side view of the main part of the flexible arm taken longitudinally through the cannula 9, and FIG. 3 showing the essentials of the present invention. FIG. 4 is a front view taken along the line A--A in FIG. 3. 2... Base swivel, 5... Terminal mount, 4, 7...
・Horizontal axis, 8... Mounting pipe, 9... Mantle, 10, 1
DESCRIPTION OF SYMBOLS 1... Forked piece, 12... Connection rod, 13... Base slider, 14... Terminal slider, 17°21... Link, 24... Coil spring, 31. 32...Insertion hole, 3
3...Stopper pin.

Claims (1)

[Scope of utility model registration request] A prong-like piece protruding from both ends of the cannula is pivotally supported on a horizontal shaft provided on each of a base swivel that is supported so as to be horizontally rotatable, and a terminal mount from which a mounting pipe vertically projects. A base slider and a terminal slider connected by a connecting rod are fitted at both ends, and a link having one end connected to each slider is eccentrically attached to the base pivot and the terminal mount from the respective horizontal axes. In a flexible arm, the connecting rod is wound with a coil spring, one end of which is fixed to the cannula near the base slider, and the other end of which is hung around the terminal slider. An insertion hole consisting of several stages in the axial direction is provided on the flank corresponding to the outside of the terminal slider, and one of the insertion holes is selected to insert a stopper pin that crosses the inner space of the cannula. A free arm flip-up limiting device characterized by being freely inserted.