JPS5817099Y2 - Automatic locking mechanism of telescopic tube - Google Patents

Description

[Detailed description of the invention] This invention can be freely expanded and contracted according to the length of the stored items such as paper, drawings, etc., and can be used to store and carry various types of stored items in one tube. This invention relates to an automatic locking mechanism for a telescoping tube.

Various types of telescoping tubes such as those mentioned above have been devised by Mr. Motonagi and are being commercialized as convenient tubes, but with conventional telescoping tubes, the inner tube and outer tube can be slid to adjust the length to the desired length. When locking, there are drawbacks such as it is difficult to confirm the lock location, difficult to lock, and easy to unlock.

An object of the present invention is to provide an automatic locking mechanism for a telescoping tube that is easy to lock and can be locked reliably.

In order to achieve the above object, the present invention provides lock walls on the outer circumferential surface of the inner cylinder at appropriate intervals in the length direction, and includes a lock piece that engages with the lock walls inside near the opening of the outer cylinder. In a length-adjustable plastic telescopic tube, the detachment knob on the outside of the outer tube, the lock piece and the movable spring contact surface on the inside of the outer tube are integrally connected through a hole in the outer tube. A fixed spring contact surface is provided on the outer cylinder to face the movable spring contact surface, and a spring is inserted between the movable spring contact surface and the fixed spring contact surface. That is.

Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIGS. 1 to 4, the outer cylinder A and the inner cylinder B are made of plastic by blow molding, and are fitted together in a telescopic manner.

The inner cylinder B has a sliding wall a provided on its outer peripheral surface in the length direction.

Lock walls 1, 1 are provided at appropriate intervals, and the outer cylinder A is provided with a lock piece 2 on the inner side near the opening thereof, which engages with the lock wall 1. By expanding and contracting B to a desired length, the lock piece 2 of the outer cylinder A can be locked and fixed to the lock wall 1 of the inner cylinder B.

To explain this in detail, Figure 5 A 9 and Figure 6 I 9
As shown in the figure, through-holes 5, 5 are bored in the outer cylinder A, and a recessed hole 5a is formed on the center line of the through-holes 5, 5 a little apart.
In other words, a protrusion is provided on the inside of the outer cylinder A, and an immovable spring contact surface 7 is formed on the outer surface of the outer cylinder A.

The detachment knob 4 has 5 ports in Fig. 5 (A) and 2 ports in Fig. 7 (A).

C. As shown in 2, it is molded from plastic, has notches 8 carved on its upper surface, and has two legs 9, 9 at the bottom for engaging the lock piece 2 through the through holes 5, 5 of the outer cylinder A. is provided protrudingly, and a hook 10.10 is provided at its tip.

Lock piece 2I/'i, 2 ports (A) in Figure 5 and 2 ports (A) in Figure 8.

C. As shown in 2, it is molded from plastic, one side has an opening 11, the other side forms a retaining part 12 that comes into contact with the lock wall 1 of the inner cylinder B and a movable spring contact surface 3, and the body part is opened from the opening 11. 5 recessed holes in outer cylinder A! It forms a space 13 that embraces the protrusion and accommodates the spring 6, and is further provided with an opening 14, 14 on the outside in which the opening angles 10, 10 of the legs 9, 9 of the detachment knob 4 engage. There is.

In order to assemble the detachment knob 4, lock piece 2, and spring 6 to the outer cylinder A, the detachment knob 4 is arranged from the outside of the outer cylinder A so that the legs 9, 9 pass through the through holes 5, 5. , the spring 6 is arranged between the movable spring contact surface 3 and the immovable spring contact surface 7 of the convex concave hole 5a, and the lock piece 2
The legs 9, 9 of the removal knob 4 are removed from the inside of the outer cylinder A through the holes 14,
14 and press the release knob 4 and the lock piece 2, the opening angle of the legs 9 of the release knob 4 is 10.
10 is engaged with the openings 14, 14 of the lock piece 2.

Therefore, since the lock piece 2 is always given a restoring force to the outside by the elasticity of the spring 6, the lock piece 2 is
When it falls from the sliding wall a on the outer peripheral surface to any lock wall 1, 1, it! The lock piece 2 is automatically engaged with the lock walls 1, 1 by the resilient force of the spring 6 stored in the spring 6, and the outer cylinder A and the inner cylinder B are firmly locked.

Slide the housing detachment knob 4 inward with your fingertips to disengage the lock piece 2 from the lock walls 1, 1, and at the same time move the outer cylinder A and inner cylinder B relative to each other, the lock piece 2 rides on the sliding wall a and can extend or contract the outer cylinder A and the inner cylinder B.

In this case, if you want to move only by - pitch, you can remove your finger and leave it after operating the detachment knob 4, but if you want to move it by several pitches, pull the detachment knob 4 inward as described above. Then move the outer cylinder A and the inner cylinder B relatively, and when the lock piece 2 passes through the lock walls 1, 1 on the way and gets on the sliding wall a in front of the desired lock walls 1, 1, press your finger. Just let go.

FIG. 9A shows another embodiment of the present invention.

In this embodiment, an immovable spring abutting surface 7 is formed on the inner surface of the recessed hole 5a, and a spring 6 is accommodated in the recessed hole 5a.

On the other hand, the detachment knob 4 has the same legs 9, 9 and opening angles 10, 10 as in the previous embodiment, and also has a movable spring contact surface 3 protruding downward, and an outer lock piece 2 that locks the inner cylinder B. It consists only of an engaging part 12 that abuts against the wall 1 and an opening 14.14.

Then, the legs 9, 9 of the release knob 4 are inserted into the through holes 5, 5, and the opening angles 10, 10 at the tips thereof are inserted into the openings 14, 1 of the lock piece 2.
4, and together with this, the movable spring contact surface 3 is inserted into the recessed hole 5a.

Therefore, the lock piece 2 can be engaged with the lock wall 1 by the elasticity of the spring 6, or can be separated from the lock wall 1 against the elasticity of the spring 6.

FIG. 10A shows still another embodiment of the present invention.

In this embodiment, an immovable spring abutment surface 1 is formed on the inner surface of the recessed hole 5a, and the opposite side thereof is open so that a spring 6 is accommodated in the recessed hole 5a.

On the other hand, the detachment knob 4 has legs 9, 9 and opening angles 10, 10 similar to those in the previous embodiment, and the scraped lock piece 2 is provided with an engaging portion 12 and an opening 14°14. A protrusion 15 having a movable spring contact surface 3 is provided in a protruding manner on 12 .

Then, the protrusion 15 is inserted into the recessed hole 5a from the open side, the spring 6 is interposed between the immovable spring contact surface 1 and the movable spring contact surface 3, and the legs 9, 9 of the detachment knob 4 are inserted. It is inserted into the through holes 5, 5, and the opening angles 10, 10 at the tips thereof are engaged with the openings 14, 14 of the lock piece 2.

Therefore, the lock piece 2 can be engaged with the lock wall 1 by the elasticity of the spring 6, or can be separated from the lock wall 1 against the elasticity of the spring 6.

As is clear from the above explanation, according to this invention, once the lock piece is placed on the sliding wall in front of the lock wall to be locked, the lock can be automatically locked by simply moving the outer cylinder. Therefore, it is easy to confirm the locking location, the locking is performed dynamically, and the locking is firmly performed.

In addition, since the detachment knob and the lock piece can be configured with a thin width and small bulk, the parts cost is low, and the assembly cost is low due to the above-mentioned engagement structure and spring abutting structure. There are advantages.

[Brief explanation of drawings]

Figures 1, 2, and 3 show a telescopic tube in which this invention is implemented, with Figure 1 being a front view in a closed state, Figure 2 being a bottom view, and Figure 3 being a front view in an extended state. It is a diagram. FIG. 4 is an enlarged front view of the main parts of the inner cylinder. Figure 5A shows the locked state of the lock piece, and is a sectional view taken along the ■-■ arrow in Figure 4.
The opening of the figure shows the unlocked state of the lock piece, and is a sectional view similar to that of FIG. 5A, and the opening of FIG. 7A to 2 are respectively a front view, a top view, a side view, and a rear view of the release knob, and FIGS. 8A to 2 are a front view, a top view, a side view, and a rear view of the lock piece, respectively. , Figure 9a. Portion 2 shows another embodiment of the present invention, and FIG. It is a partial sectional view similar to. A...Outer cylinder, h...Inner cylinder, a...
...Sliding wall, 2...Lock piece, 3...
Movable spring contact surface, 4...Removal knob, 9.
... Legs, 10 ... Opening angle, 12 ...
- Engagement part, 14...hole.

Claims (1)

[Scope of utility model registration request] Made of plastic whose length can be adjusted, lock walls are provided on the outer peripheral surface of the cylinder at appropriate intervals in the length direction, and a lock piece that engages with the lock wall is provided inside near the opening of the outer cylinder. In the telescopic tube, the detachment knob on the outside of the outer tube, the lock piece and the movable spring contact surface on the inside of the outer tube are made to operate integrally through the hole in the outer tube, and the above-mentioned An automatic locking mechanism for a telescoping tube, which is provided with an immovable spring abutting surface facing a movable spring abutting surface, and inserting a spring between the movable spring abutting surface and the immovable spring abutting surface.