JPH074893A - Rod expanding/contracting mechanism and nightstick using extending or retracting mechanism - Google Patents

Abstract

PURPOSE:To enable a rigid engaging force to be attained when a rod is expanded and to enable it to be contracted through a simple operation by a method wherein a second rod and a third rod are provided with an engaging part which can be freely projected and the rear part of the third rod is provided with a guide part. CONSTITUTION:When a middle cylinder 5 is pulled out of a base cylinder 1, a lid 7 for the middle cylinder is stopped by an engaging pipe 6 arranged at an extremity end of the base cylinder 1. At this time, a projected part 18 of an automatic engaging projection piece 8 is fitted into and inserted into a recessed hole 20 by a spring 11 and fixed to the base cylinder 1. Then, when the extremity rod is stored in the middle cylinder 5, an engaging releasing member 14 acting as a guide member arranged at the rear end of the leading rod is engaged with the base part of the automatic engaging projection piece 8 to apply a force to be directed to pull out the projection part 18 fitted and inserted into the recessed hole 20, thereby the rod is removed to cause the fixed state between the base cylinder 1 and the middle cylinder 5 to be released. Accordingly, as the engaged state of the leading rod is manually released and moved back, the engaged state of the middle cylinder 5 is also automatically released and the entire rod member can be shortened through its one touch operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is suitable for storage and carrying.
Its length can be shortened, on the other hand, when used, it can be extended to a corresponding length, and when extended, it can withstand a strong axial pressing force and can be stored. The present invention relates to a structure of a stretchable rod-shaped body that can be shortened by an extremely simple operation, and a stretchable baton using the structure.

[0002]

2. Description of the Related Art When storing or carrying, the length is shortened, and when used, it is stretched to form one or several rods. There are many types of rods that have a function called telescopic rods) that are used in everyday life.

Typical examples thereof include a foldable umbrella pattern and a camera tripod. These usually have a structure in which a hollow middle cylinder is inserted into a multi-stage hollow outer cylinder, and when extended, a protruding member provided on the middle cylinder is fitted into a notch hole or a recess provided on the outer cylinder. The structure is such that the stretched state is maintained by combining them. Then, when shortening this, a little strong force is applied in the axial direction, or the protrusion-like member is pushed inward by a finger or the like to push it into the cylinder, thereby releasing the coupling between the cylinders. And insert the middle cylinder into the outer cylinder.

[0004]

In the conventional telescopic rod as described above, in the case of a tripod of a camera, for example, due to the structure of the locking mechanism, a plurality of locking portions must be operated one by one. It could not be shortened.
In addition, in the case of a structure that is often used for conventional folding umbrellas that fit a spherical projection to an outer cylinder, it can be shortened at once by applying force, but when it is extended the axial direction The fixing force of was not so strong, and there was a problem that stable strength as a rod-shaped body could not be obtained. Further, in the case of such a structure, there is a problem that the skin of the fingertip is caught in the gap when shortening.

Conventionally, the baton used by police officers and the like for self-defense and control has been made of wood and has an integral structure.

Since this is about 60 cm in length, it may be inconvenient for a police officer to carry with him at all times, and especially when he is running, the baton attached to his waist with one hand is swayed. It was necessary to prevent Therefore, it has been desired to develop a baton that maintains a shortened state when carried, rapidly expands to a desired length when used, has a certain strength in the expanded state, and can be shortened by a simple operation.

However, in the conventional locking mechanism for the telescopic rod, it is not possible to satisfy the different requirements that the extension and shortening can be performed by a simple operation and sufficient strength is satisfied in the extended state for the above-mentioned reason. could not. In view of such conventional problems, the present invention provides a locking mechanism that can obtain a strong locking force when extended, and a rod-shaped expansion and contraction mechanism that can be shortened by an extremely simple operation, and
The purpose is to provide batons that utilize this.

[0008]

According to the invention, the aforesaid problems are solved by the means defined in the claims. That is, the invention of claim 1 has an arbitrary cross section having a first rod-shaped body having an arbitrary cross-sectional shape, and a locking portion that is housed in the first rod-shaped body and is proximate to the rear end portion and can project to the outside of the rod-shaped body. A second rod-shaped body, and a guide portion that is housed in the second rod-shaped body and that engages with the locking portion of the second rod-shaped body and stores the locking portion inside the rod-shaped body A telescopic mechanism for a rod-shaped body including a third rod-shaped body,

According to a second aspect of the present invention, there is provided a hollow cylindrical base cylinder, a middle cylinder having a locking portion which is housed in the base cylinder and which is capable of projecting outside the cylinder in the vicinity of a rear end portion, and the middle cylinder. A baton having a tip bar that is housed at a rear end thereof and has a guide portion that engages with a locking portion of a middle cylinder to house the locking portion inside the cylinder and a locking portion that is projectable outside the cylinder. The invention of claim 1 is applied to a baton.

According to a third aspect of the present invention, there is provided the expansion / contraction mechanism for the rod-shaped body according to claim 1, wherein the tubular guide portion presses an inclined portion connected to the locking portion to accommodate the locking portion in the rod-shaped body. Claim 4
In the above-described telescopic baton, the permanent magnet is arranged at the rear end of the base cylinder or at the base of the middle cylinder.

[0011]

According to the first aspect of the invention, the first rod-shaped body and the second and third rod-shaped bodies are provided.
The rod-shaped body expands and contracts like a telescope. The second rod-shaped body has a locking portion that is capable of projecting outside the rod-shaped body, and when extended, the locking portion protrudes outside the rod-shaped body so as to form a second
The rod-shaped body of 1 is restricted from being fitted into the inside of the first rod-shaped body.
A similar locking means is also provided on the third rod-shaped body.
The rod-shaped body of the second rod-shaped body is restricted from being fitted into the second rod-shaped body, but there is a guide portion at the rear portion of the third rod-shaped body. The locking portion provided on the rod-shaped body is engaged to house the locking portion inside the rod-shaped body. Therefore, when the locking means of the third rod-shaped body is released and the third rod-shaped body is slid into the inside of the second rod-shaped body, the locking means of the second rod-shaped body is also automatically released and the first rod-shaped body is locked.
It is slid and inserted into the rod-shaped body. With such a structure, the other restricting means are automatically released only by releasing the restricting means of the third rod-shaped body, and the rod-shaped body can be reduced with one touch. This configuration is not limited to three stages of rod-shaped bodies, and can be applied as it is even if the rod-shaped bodies are multi-tiered, and the entire rod-shaped body can be reduced only by releasing the regulation of the rod-shaped body corresponding to the third rod-shaped body. You can Further, since the rod-shaped body is not reduced unless the third restricting means is released, the extended rod-shaped body can maintain sufficient strength. Therefore,
Even when the invention of claim 1 is used for a baton as in claim 2, sufficient strength can be obtained, and extension and shortening can be instantaneously performed.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of the expansion / contraction mechanism of a rod-shaped body according to an embodiment of the present invention will be described below with reference to FIGS. FIG. 1 shows a state in which a base cylinder which is a first rod-shaped body and an intermediate cylinder which is a second rod-shaped body are fixed by a locking mechanism, and FIG. 2 shows a front rod which is a third rod-shaped body. The state is shown in which the second cylinder is housed in the middle cylinder, and the locking mechanism provided in the middle cylinder is released.

As shown in the figure, the middle cylinder 5 has a notch hole 20 near one end thereof. When the middle cylinder 5 is pulled out from the base cylinder 1, the middle cylinder cover 7 is stopped by the locking tube 6 provided at the tip of the base cylinder, the movement in the forward direction being restricted. Further, at this time, it is possible to make a circular motion within a certain range around the fulcrum shaft 19, and the projection mechanism 18 is engaged by the spring 11 so as to be fitted into the cutout hole 20 of the middle cylinder. It is fixed to the base cylinder by.

When the front rod 12 is housed in the middle cylinder 5, the lock releasing member 14 which is a guide portion provided at the rear end portion of the front rod 12 causes the automatic locking protrusion 8 to move. By engaging with the base portion of the above and applying a force in the direction of removing the convex portion 18 of the automatic locking projection piece 8 fitted and inserted in the notch hole 20 of the middle cylinder, this is pulled out, and the base cylinder The fixed state of 1 and the middle cylinder 5 is released. Therefore, when the locking of the front rod 12 which is the third rod-shaped body is released and retracted, the locking of the second rod-shaped body is also automatically released, and the entire rod-shaped body can be reduced with one touch. If the configuration is configured in multiple stages, regardless of the number of stages, all the regulations can be released by only releasing the regulation of the third rod-shaped body, and thus one-touch reduction is possible.

FIGS. 3 and 4 are views showing an embodiment in which the present invention is constructed as a baton. FIG. 3 is an external view and FIG. 4 is a sectional view. In the figure, 1 is a base cylinder, 2 is a rear end cap, 3 is a permanent magnet, 4 is a collar body, 5 is a middle cylinder, 6 is a rear locking tube for the middle cylinder, 7 is a cover for the middle cylinder, and 8 Is an automatic locking projection, 9
Reference numeral 10 denotes a support body, and 10 denotes a through hole for an automatic locking protrusion.

Further, 11 is a coil spring, 12 is a tip bar, 13 is a top ball, 14 is a guide member (guide short pipe) for releasing locking, 15 is a push-in locking projection piece, 16 is a front locking tube, Reference numeral 17 is a kick spring, 18 is a convex portion of the automatic locking projection piece, 19 is a fulcrum shaft of the automatic locking projection piece, 20 is a cutout hole of a middle cylinder, 21 is a convex portion of the push-in locking projection piece 15, and 22 is a tip. Represents a notched hole in a bar. The present embodiment will be described below with reference to FIG.

The embodiment shown in the figure is formed of a round bar of high strength aluminum alloy, and has a length of about 210 mm in a base cylinder of about 200 m.
The middle cylinder of m is accommodated, and a tip rod having a length of about 145 mm is accommodated in the middle cylinder.
The total length is about 234 mm, and the extension state is about 530 mm. A rear end cap 2 is screwed to the base cylinder 1, and a permanent magnet 3 is fixed to a substantially central portion of the rear end cap 2. Further, a one-letter-shaped collar body 4 having a notch hole into which a lowering string is inserted is provided at a predetermined position of the base cylinder 1. Further, a rear locking tube 6 that guides the middle cylinder 5 and locks the middle cylinder 5 is inserted in the inner peripheral portion of the tip of the base cylinder 1.

The rear locking tube 6 prevents the end portion of the base cylinder 1 from being worn or damaged by the automatic locking projections 8, prevents the middle cylinder 5 from falling off, and guides the expansion and contraction of the middle cylinder 5. To do. An iron lid 7 is screwed to one end of the middle cylinder 5 housed in the base cylinder 1.

The support 9 holds the automatic locking projection 8 and is attached to the end of the middle cylinder 5.
Has a through hole that supports a shaft that makes a circular motion. The caulking pin is inserted and fixed in the through hole provided in the support body 9 and the through hole 10 provided in the automatic locking projecting piece 8 to slidably connect the automatic locking projecting piece 8.

A coil spring 11 is inserted into a notch formed in the support 9. The top of the coil spring 11 is restrained at the upper part of the rectangular cutout groove provided in the automatic locking projection 8, and the bottom of the coil spring 11 is restrained at the inner peripheral part of the middle cylinder 5. The above-mentioned angular notch groove has a convex shape,
Since the central protrusion is inserted into the coil spring 11, the coil spring 11 will not fall off.
Of course, the coil spring 11 is not limited to the coil spring as long as it elastically biases the automatic locking projection 8.

The automatic locking projection 8 held by the support 9 is
The coil spring 11 relaxes the inside of the middle cylinder 5, and the convex portion 18 of the self-locking projection is fitted into the notch hole 20 of the middle cylinder 5. The base cylinder 1 and the middle cylinder 5 are firmly fixed by the second stop mechanism (A) formed by them.

A top ball 13 covered with rubber is screwed to the tip of the tip rod 12, while the rear end of the tip rod is
The guide short pipe 14 having a function of releasing the second stop mechanism (A) by pressing the inclined portion of the automatic locking projection 8 of the second stop mechanism (A) provided on the middle cylinder 5 is fixed.

At the front part of the guide short pipe 14, the front locking pipe for preventing the middle cylinder 5 from falling off and for preventing the end portion of the middle cylinder 5 from being worn or damaged by the push-fitting locking projections 15. 16 is inserted so that the tip rod 12 can freely slide. The push-fitting locking projection 15 is fitted in the position of the tip bar corresponding to the tip of the front locking tube 16.

The front portion of the push-in locking projection 15 is perforated, and the tip end portion of the kick spring 17 is fitted into the hole, and the rear end portion of the kick spring 17 is fixed to the bottom portion of the tip rod 12 to form a first portion. The stop mechanism (B) is formed.

When this is used, it is often urgent and it can be extended to the full length with a single swing. In order to shorten and store, the push-in locking projection 15 of the tip bar 12 is pushed down and the tip bar 12 is slid into the inside of the middle cylinder 5 and stored. Since it abuts and accommodates this inside the cylinder, and the locked state is automatically released, the middle cylinder 5 can also be arbitrarily accommodated inside the base cylinder 1. That is,
With this mechanism, simply releasing the locking mechanism of the tip bar,
A multi-stage rod-shaped body can be automatically shortened and stored.
In addition, even if a strong force is applied that pushes in the axial direction during extension without releasing the first stop mechanism, each locking mechanism works, so the tip bar is unexpectedly stored in the middle cylinder, The middle cylinder is not housed in the base cylinder, and the strength sufficient as a rod-shaped body is maintained in the expanded state, so that it can withstand severe usage conditions.

In the above-mentioned telescopic baton, the permanent magnet 3 of the rear end cap of the base cylinder is such that when the middle cylinder is housed in the base cylinder,
The middle cylinder is attached to the lid body to prevent the middle cylinder from accidentally escaping from the base cylinder. A similar structure can be provided between the tip rod and the middle cylinder.

Although the baton using the stop mechanism (locking mechanism) as the embodiment of the present invention has been described above, the present invention is not limited to the stop mechanism of the embodiment, but a guide for the third rod-shaped body. The other part includes a structure for releasing the stop mechanism of the second rod-shaped body. The range of application is not limited to batons, and it can be applied to any article that is normally shortened for storage or carrying and is stretched for use. For example, a stretchable cane,
A tripod and the like are suitable examples to which the present invention is applied.

[0028]

As described above, since the telescopic rod of the present invention can form a strong rod-shaped body when it is extended, it requires strength such as an telescopic baton or an expandable cane. It has the advantage that it is suitable for a rod-shaped body to be used, and that the rod-shaped body can be extended and shortened with one touch, and the structure is convenient for storage and carrying.

[Brief description of drawings]

FIG. 1 is a view for explaining the operation of the expansion / contraction mechanism for a rod-shaped body of the present invention, and is a cross-sectional view of a state in which the rod-shaped body is fixed by a locking mechanism.

FIG. 2 is a cross-sectional view of a state where the locking mechanism of FIG. 1 is released.

FIG. 3 is a view showing an embodiment in which the present invention is configured as a baton, and is an external side view.

4 is a partial cross-sectional view of the baton of FIG.

[Explanation of symbols]

 1 Base Cylinder 2 Rear End Cap 3 Permanent Magnet 4 Collar Body 5 Middle Cylinder 6 Rear Catch Tube 7 Middle Cylinder Cover 8 Automatic Locking Protrusion 9 Bearings 10 Automatic Locking Protrusion Through Hole 11 Coil Spring 12 Tip bar 13 Top ball 14 Lock release member (guide short pipe) 15 Push-in locking projection piece 16 Front locking tube 17 Kick spring 18 Convex part of automatic locking projection piece 19 Shaft of automatic locking projection piece 20 Notch hole in the middle cylinder 21 Convex portion of the push-fit locking projection 22 Notch hole in the tip rod

Claims (4)

[Claims] 1. A second rod having an arbitrary cross-sectional shape having a first rod-shaped body having an arbitrary cross-sectional shape, and a locking portion which is housed in the first rod-shaped body and is proximate to the rear end portion so as to project outside the rod-shaped body. A rod-shaped body, and a third rod-shaped body that is housed in the second rod-shaped body and has a guide portion that is housed in the second rod-shaped body and that engages with the locking portion of the second rod-shaped body to house the locking portion in the rod-shaped body. Stretching mechanism of a rod-shaped body. 2. A hollow cylindrical base cylinder, a middle cylinder that is housed in the base cylinder and has a locking portion that is proximate to the rear end and can project outside the cylinder, and a rear cylinder that is housed in the middle cylinder. A baton having a tip bar having a guide part that engages with the locking part of the middle cylinder and accommodates the locking part inside the cylinder, and a locking part that can project outside the cylinder. 3. The expansion / contraction mechanism for a rod-shaped body according to claim 1, wherein the tubular guide portion presses an inclined portion continuously provided with the locking portion to accommodate the locking portion in the rod-shaped body. 4. The telescopic baton according to claim 2, wherein a permanent magnet is fixed to the rear end of the base cylinder or the base of the middle cylinder.