JPH04344098A - Club of telescopic structure - Google Patents

Abstract

PURPOSE:To provide a club which is not liable to looseness or shake despite its repeated use and whose telescopic parts will not slide off from one another despite its thin wall and lightweight when the club is driven outward to be extended to the fullest length. CONSTITUTION:A plurality of tubes are interengaged telescopically. When a club is extended to the fullest length, the conical surfaces 25d and 26d of the front ends of outer tubes 25 and 26 are engaged with the conical surfaces 26f and 27f of the rear ends of inner tubes 26 and 27 to prevent the tubes from sliding off from one another. The tubular slide guide surfaces 25c, 26c, 26e and 27e formed before and behind these conical surfaces are brought into facial contact with the tubes to prevent the occurrence of plat and shake. The thickness of the outward end of the outer tubes 25 and 26 is increased to prevent the telescopic parts from being driven off out of engagement.

Description

[Detailed description of the invention]

0001

[Industrial Field of Application] This invention relates to the telescopic structure of a telescoping baton, which can be extended and contracted extremely smoothly without wobbling or wobbling.
Concerning the telescopic structure of a highly durable baton.

0002

[Prior Art] The conventional telescopic structure of this type of baton consists of, for example, combining a plurality of cylinders with different diameters in a nested manner, so that in the extended state, the inclined outer surface of the rear end of the inner cylinder It is known to engage with the sloping inner surface of the tip of the immediately outer cylindrical body to prevent it from coming off.

0003

[Problems to be Solved by the Invention] However, in the conventional extensible structure of the baton, the tip of the outer cylindrical body is an inclined surface that tapers to the tip on both the outer and inner surfaces, and the rear end of the inner cylindrical body is tapered to the tip. Both the outer and inner surfaces are tapered slopes to the rear end. As a result, the following problems have arisen.

[0004] During expansion and contraction, the tip of the slanted inner surface of the outer cylindrical body slides into circular, almost line contact with the cylindrical outer surface of the inner cylindrical body, and the rear end of the slanted outer surface of the inner cylindrical body slides against the cylindrical outer surface of the inner cylindrical body. It comes into sliding contact with the cylindrical inner surface of the cylinder in a circular line contact and is guided. Therefore, the guide tip of the outer cylindrical body and the guide rear end of the inner cylindrical body are likely to wear out, and as a result, the clearance of the guide portion becomes large and rattling or wobbling is likely to occur.

[0005] ■ If the cylindrical body is made thinner to reduce weight,
When stretched by applying strong force, the inclined inner surface of the outer cylinder is pushed by the inclined outer surface of the inner cylinder, making it easier to open outward.
As a result, the inner diameter is enlarged and the inner cylindrical body slips out from the outer cylindrical body.

[0006] Therefore, the present invention aims to solve the above-mentioned conventional problems.It is difficult for rattling or shaking to occur even after repeated use, and even if the weight is reduced, it does not come off due to the stretching force. The purpose is to provide a telescopic structure for a baton that does not have any.

[0007]

[Means for Solving the Problems] This invention, which achieves the above object, is constructed by combining a plurality of cylinders with different diameters in a nested manner, and the inclined surface of the rear end of the inner cylinder is in an extended state. This is related to the telescopic structure of the baton that can be engaged with the inclined surface of the tip of the cylinder just outside the baton, and the tip of the outside cylinder has a cylindrical outer surface and a tapered cone on the inner surface. The rear end of the inner cylindrical body has a cylindrical slide guide surface on its outer surface and a tapered slide guide surface that continues to the conical slide guide surface. It is equipped with a conical inclined surface. The slide guide surface of the outer cylinder is slidably contacted with the outer peripheral surface of the inner cylinder, and the slide guide surface of the inner cylinder is slidably contacted with the inner peripheral surface of the outer cylinder, so that at least one of the batons Ventilation holes were provided at the locations.

A step is provided between the inner circumferential surface of the outer cylinder and the base of the conical inclined surface, and a step is provided between the slide guide surface of the inner cylinder and the conical inclined surface. It is possible to provide a level difference so that it can be stopped.

[0009] Furthermore, a wear-resistant layer may be formed on the inner surface of the outer cylinder and the outer surface of the inner cylinder. Furthermore, a ring made of a wear-resistant material and having a slide guide surface can be attached to the tip of the outer cylinder.

[0010] Furthermore, a ring made of a wear-resistant material and having a slide guide surface can be attached to the rear end of the inner cylinder. Moreover, the inclination angle of each conical locking surface of the outer cylinder and the inner cylinder can be 1 to 2 degrees.

[0011]

[Function] When expanding and contracting, the cylindrical slide guide surface of the outer cylinder is on the outer surface of the inner cylinder, and the cylindrical slide guide surface of the inner cylinder is on the outer cylinder. Since they are guided in surface contact with the inner surface of the cylinder, wobbling and runout are significantly reduced compared to conventional methods. In addition, there is little wear even after repeated expansion and contraction operations, and rattling and wobbling can be kept to a low level even after long-term use.

[0012] Also, even in the case where the overall thickness of the cylindrical body is reduced to reduce its weight, only the tip of the outer cylindrical body is formed to have a cylindrical outer surface and a thick wall. Therefore, even if a large stretching force is applied, there is a large resistance to the expansion force that opens the tip of the cylindrical body outward, and the inner cylindrical body will not fall out. If the outer cylindrical body and the inner cylindrical body are connected via a step, the retaining function will be even greater. Furthermore, if the angle of inclination of each of the conical locking surfaces of the outer cylinder and the inner cylinder is set to 1° or more, there is no possibility of it coming off due to a slight dimensional error during manufacturing.

Furthermore, forming a wear-resistant layer on the inner surface of the outer cylinder and the outer surface of the inner cylinder, or attaching a ring made of wear-resistant material with a slide guide surface to the tip of the outer cylinder, The durability can be extremely increased by taking measures such as attaching a ring made of wear-resistant material and having a slide guide surface to the rear end of the inner cylindrical body.

[0014]

Embodiments Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall perspective view of a telescoping baton with a cross handle showing a first embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view thereof, and FIG. 3 is an enlarged cross-sectional view of a main part illustrating the telescoping structure.

In FIG. 1, reference numeral 1 denotes the rod body, and the solid line represents the rod when it is contracted, and when it is expanded, it has a length L as shown by the chain line. The rod body 1 is placed at a position closer to one end than the center in the longitudinal direction of the rod body 1, that is, at a position close to the grip handle A provided at one end of the rod body.
It is provided with a cross handle 2 which is long enough to be grasped with one hand and is branched in a direction perpendicular to the main body. The grip handle A is made by inserting a cylindrical body A1 made of synthetic resin, wood, or light metal into the rod body 1.

As shown in FIG. 2, the cross handle 2 of this embodiment has a support shaft 6 extending perpendicularly to the rod body 1 from a mounting base 5 for fixing it to the rod body 1. The lower relative rotor 7 is loosely fitted to the base end 6a of the support shaft 6, the upper relative rotor 8 is loosely fitted to the tip 6b of the support shaft 6, and the upper and lower relative rotors are inserted through the intermediate portion 6c of the support shaft 6. It is a vertically rotating cross handle equipped with a stator 9 fixed to a support shaft 6 at a position sandwiched between relative rotors 7 and 8.

The rod body 1 is telescopically constructed of a plurality (three) of cylinders 25, 26, and 27 having different diameters. The outer cylinder 25 having the largest diameter has a female thread 28 formed on the inner diameter surface of the rear end side toward the back from the opening, a plug 29 having an outer diameter thread is screwed into the inner part, and a plug 29 is screwed into the rear end opening. A cap 30 is screwed on to close the lid. The outer circumferential surface of the outer cylinder 25 is a cylindrical surface 25a, but the inner circumferential surface has a tapered inclined surface 25d at the tip. The intermediate cylinder 26, which is an inner cylinder housed inside the outer cylinder 25, has an outer surface at its rear end that is slightly outward toward the opening at the rear end so that it can engage with the inclined surface 25d of the outer cylinder 25. The intermediate cylinder 26 has an inclined surface 26f with an enlarged diameter, and a tapered inclined surface 26d on the inner peripheral surface of the distal end portion of the intermediate cylinder 26. The inner cylinder 27 housed inside the intermediate cylinder 26 has an outer diameter slightly formed on the outer surface of the rear end toward the opening at the rear end so that it can engage with the inclined surface 26d at the tip of the intermediate inner cylinder 26. It has an expanding inclined surface 27f, and
A female thread is formed on the inner surface of the tip opening, and a cap 36 is screwed thereon. The rear end of the inner cylinder 27 has an inner diameter large enough to engage the two-pronged spring 38 screwed to the plug 29 during contraction, and the thickness of the base of the cap 36 at the tip is equal to the thickness of the tip of the intermediate cylinder 26. It is said to be large enough to be locked.

Further, with reference to the enlarged sectional view of FIG.
To explain the details of the telescopic structure, the tips of the outer cylinder 25, which is the outer cylinder, and the intermediate cylinder 26 (which is the outer cylinder with respect to the inner cylinder 27) are arranged so that the outer surface 25a (26a) On the other hand, the inner surface of the tip part has a tapered conical inclined surface 25d (26d) and a continuous cylindrical inclined surface 25d (26d). A slide guide surface 25c (26c) is formed. On the other hand, the middle 26 (outer cylinder 25
A cylindrical slide guide surface 26e is formed on the outer surface of the rear end of the inner cylinder 27 (inner cylinder) and the inner cylinder 27 in order from the rear end.
(27e) and this slide guide surface 26e (27e)
A tapered conical inclined surface 26f (27f) continuing to is formed.

Then, the slide guide surface 25c on the inner surface of the tip end of the outer cylinder 25 and the cylindrical outer peripheral surface 26a of the intermediate cylinder 26 fit together with a slight clearance, and the intermediate cylinder 2
The slide guide surface 26e on the outer surface of the rear end of the outer cylinder 25 and the cylindrical inner circumferential surface 25b of the outer tube 25 fit together with a slight clearance. Further, the slide guide surface 26c on the inner surface of the tip end of the intermediate cylinder 26 and the cylindrical outer circumferential surface 27a of the inner tube 27 fit together with a slight clearance, and the slide guide surface 27e on the outer surface of the rear end of the inner tube 27 fits together. and the cylindrical inner circumferential surface 26b of the intermediate cylinder 26 are fitted together with a slight clearance.

At least one vent hole 31 is formed on the side surface of the outer cylinder 25. However, the vent hole 31 may be provided in the intermediate cylinder 26 or the inner cylinder 27, or may be provided in the cap 30 attached to the rear end of the outer cylinder or the cap 36 attached to the tip of the inner cylinder 27, and is not limited to a hole. It may be a groove, a slit, etc. In short, any material may be used as long as the inside and outside of the cylindrical body of the rod body 1 can be freely ventilated and the expansion and contraction operations can be performed smoothly.

Here, the inclination angle α of the conical inclined surface 25d of the outer cylinder, each of the conical inclined surfaces 26d and 26f of the intermediate cylinder, and the conical inclined surface 27f of the inner cylinder 27 is preferably in the range of 1 to 2 degrees. If the angle is less than 1°, a large force is required to release the engagement between the inclined surfaces and store the intermediate cylinder 26 in the outer cylinder 25 and the inner cylinder 27 in the intermediate cylinder 26, and the rod body 1 It is not easy to reduce it. Furthermore, depending on manufacturing errors, there is a risk that the inner cylinder may slip out of the outer cylinder and pop out due to the vibration force when the rod body 1 is extended. On the other hand, when the inclination angle exceeds 2°, the engagement force between the inclined surfaces in the extended state becomes weaker.
There is a risk that the engagement will be released due to the reaction force when the rod body 1 is struck and the rod body 1 will contract. Incidentally, Table 1 shows the test data for determining the relationship between the axial tensile load and the maximum compressive load of the rod body 1, which was prototyped with three types of inclination angles (taper angles): 1°, 1.5°, and 2°. Shown below.

[0022] The test method uses the prototype rod body 1 as a test piece,
After setting this in a universal material testing machine and applying a tensile load in the axial direction from both ends, it was then compressed in the opposite direction and the maximum compressive load at that time was measured.We requested it from the Ehime Prefectural Industrial Technology Center. So I went.

[0023]

[Table 1]

[0024] When actually using the retractable baton, the stick body 1
Shake it by hand to shake out and extend the inner cylinder. The elongation force in that case corresponds to the tensile load in Table 1. Further, in order to contract the elongated rod body 1, the tip of the rod body 1 is struck and pressed to store the inner cylinder. In that case, the pressing force is shown in Table 1.
corresponds to the maximum compressive load during From the table, it can be seen that, for example, if a force equivalent to a tensile load of 300 Kgf is applied, 260 Kgf is required at a taper angle of 1° to reduce the force, but 180 Kgf is sufficient at a taper angle of 2°. That is, if the taper angle is less than 1°, it is necessary to apply a larger force to retract it, and it is clear that if a small taper angle is swung out with a large force, it will be difficult to retract it. On the other hand, if the taper angle exceeds 2 degrees, the compressive load will be even smaller, so if you hit it hard, it will shrink and cannot function as a baton.

Next, the operation will be explained. Each cylinder 25, 26,
27 is inserted into the intermediate cylinder 26 and the inner cylinder 27 by gripping the cross handle 2 or the grip part A and applying centrifugal force to the rod body 1 in the state in which they are stored in a nested manner (FIG. 2).
is drawn out and expanded. At this time, the cylindrical outer peripheral surface 26a of the intermediate cylinder 26 is guided while being in light surface contact with the slide guide surface 25c at the tip of the outer cylinder 25, and the slide guide surface 26e at the rear end of the intermediate cylinder 26 It is guided while making light surface contact with the cylindrical inner circumferential surface 25b of No. 25. Similarly, the cylindrical outer circumferential surface 27a of the inner cylinder 27 is guided while being in light surface contact with the slide guide surface 26c at the distal end of the intermediate cylinder 26, and the slide guide surface 26c at the rear end of the inner cylinder 27
7e is guided while being in light surface contact with the cylindrical inner peripheral surface 26b of the intermediate cylinder 26. Therefore, the intermediate cylinder 26 and the inner cylinder 27 can move extremely smoothly without rattling or wobbling. Also,
Even if the slide guide surfaces 25c, 26e, 26c, and 27e are in surface contact, even if the slide guide surfaces 25c, 26e, 26c, and 27e are subjected to repeated expansion and contraction operations over a long period of time, there will be very little wear compared to conventional line contact, so the durability life will be greatly extended. Ru.

When the extension is finished, the inclined surface 26f at the rear end of the intermediate cylinder 26 swung out from the outer cylinder 25 locks with the slanted surface 25d at the tip of the outer cylinder 25, and the intermediate cylinder 26 is swung out from the outer cylinder 25. The inclined surface 27f at the rear end of the inner cylinder 27 that has been rotated is engaged with the inclined surface 26d at the distal end of the intermediate cylinder 26 to prevent it from coming off. At this time of locking, the outer cylinder 25 (and the intermediate cylinder 2
The inclined surface 25d (and 26d) at the tip of 6) receives a strong impact, and the force of the inclined surface acts in the direction of opening outward. However, in this invention, the outer surface of the outer cylinder 25 (and the intermediate cylinder 26) is made cylindrical up to the tip, and the tip, which was conventionally easily deformed, is locally thickened. It is difficult to deform even if a large force is applied in the direction of opening. Therefore, even if the rod body 1 is swung out with a large swung-out force, it is possible to prevent the stick body 1 from flying off. It is also possible to reduce the weight by making each cylinder thinner.

FIG. 4 shows a modification of the first embodiment, in which a collar 40 is attached to the rod body 1 in place of the cross handle. The extensible structure of the rod body 1 is the same as that of the first embodiment. FIG. 5 shows the main parts of the telescopic structure of the rod body 1 of the second embodiment.

In this embodiment, an outer cylinder 2 as an outer cylinder is used.
5 (and the intermediate cylinder 26), the inner circumferential surface 25b (26b
) and the base of the inclined surface 25d (and 26d).
1 is provided, and a step 52 is provided between the slide guide surface 26e (27e) and the inclined surface 26f (27f) of the intermediate cylinder 26 (and inner cylinder 27) as an inner cylinder so that it can be locked to the step 51. They are different in the way they are set up. Steps 51, 52
There is an advantage that the engagement between them further increases the retaining effect.

FIG. 6 shows the main part of the third embodiment. In this embodiment, an outer cylinder 25 as an outer cylinder (and an intermediate cylinder 2
A ring 55 made of a wear-resistant material and provided with a slide guide surface 25c (26c) is attached to the tip of 6). The wear-resistant material is preferably a titanium alloy or other high-hardness metal, or a synthetic resin with low frictional resistance such as a fluororesin.

FIGS. 7 and 8 show the main parts of the fourth embodiment. In this embodiment, a slide guide surface 26e (27
A ring 56 made of the same wear-resistant material as described above is fitted, and a threaded tightening ring 57 is screwed onto the ring 56 to fix the ring 56. However, the slide guide surfaces 26e (27e) protrude spherically from a plurality of locations (four locations in the figure) on the outer peripheral surface of the wear-resistant ring 56.

FIG. 9 shows a fifth embodiment, in which a wear-resistant ring 59
This embodiment differs from the fourth embodiment in that the slide guide surface 26e (27e) is formed into a cylindrical surface. Each of the third to fifth embodiments has the advantage that durability is significantly improved because the slide guide surface is formed of a wear-resistant material different from the cylindrical body.

Although not shown, the inner surfaces of the outer cylinder 25 and the intermediate cylinder 26 as the outer cylinders and the outer surfaces of the intermediate cylinder 26 and the inner cylinder 27 as the inner cylinders are, for example, treated with nitriding or coated with a titanium alloy layer. It is also possible to improve durability by forming an abrasion resistant layer by coating the material with, for example.

[0033]

As explained above, according to the present invention, in a telescoping baton, the end of the inclined surface where the outer cylinder and the inner cylinder engage are brought into surface contact with the peripheral surface of the cylinder. Since the slide guide surface is formed in such a manner, the expansion and contraction operation is extremely smooth, and even after repeated use, there is little wear on the end of the sloped surface, and rattling and wobbling can be prevented for a long period of time. Furthermore, since the abrasion resistance of the slide guide surface, its contact surface, etc. is enhanced, durability can be significantly improved compared to the conventional slide guide surface. In addition, the outer surface of the tip of the outer cylinder is formed into a cylindrical shape, and the inner surface is provided with a tapered conical slope and a cylindrical slide guide surface continuing to the tip of the conical slope. Because the wall is locally thickened, even if a strong impact is applied to the tip of the outer cylinder during expansion, it will be difficult to expand, preventing the inner cylinder from coming off. By providing a step on the surface and regulating the angle of inclination of the inclined surface, it is possible to obtain the effect of further preventing slippage.

[Brief explanation of drawings]

FIG. 1 is an overall perspective view of a retractable baton with a cross handle showing a first embodiment of the present invention.

FIG. 2 is a longitudinal cross-sectional view of FIG. 1;

FIG. 3 is an enlarged sectional view of a main part of the telescopic structure shown in FIG. 1;

FIG. 4 is a side view showing a modification of FIG. 1 in partial cross section.

FIG. 5 is a sectional view of a main part of the telescopic structure of the rod body 1 of the second embodiment.

FIG. 6 is a sectional view of a main part of a third embodiment.

FIG. 7 is a front view of the wear-resistant member of the fourth embodiment.

FIG. 8 is a sectional view of a main part of a fourth embodiment.

FIG. 9 is a front view of the wear-resistant member of the fifth embodiment.

FIG. 10 is a side view of FIG. 9;

[Explanation of symbols]

1 Rod body 25 Outer cylinder 26 Intermediate cylinder 27 Inner cylinder 25d Conical inclined surface 26d Conical inclined surface 26f Conical inclined surface 27f Conical inclined surface 25c Slide guide surface 26c Slide guide surface 26e Slide guide surface 27e Slide guide surface 31 Vent

Claims (6)

[Claims] Claim 1: A plurality of cylinders having different diameters are combined in a nested manner, and when the inner cylinder is in an extended state, the sloped surface of the rear end of the inner cylinder engages with the sloped surface of the tip of the cylinder just outside it. In the extensible structure of the baton, the tip of the outer cylinder has a cylindrical outer surface, a tapered conical inclined surface on the inner surface, and a cylinder continuing from the conical inclined surface. The rear end of the inner cylindrical body has a cylindrical slide guide surface on its outer surface and a tapered conical inclined surface continuing to the slide guide surface, and the rear end of the inner cylindrical body The slide guide surface of the baton is formed to be able to slide on the outer peripheral surface of the inner cylinder, and the slide guide surface of the inner cylinder is slidably contacted with the inner peripheral surface of the outer cylinder, and at least one vent hole is provided in the baton. A telescopic structure of the baton, which is characterized by the provision of a retractable structure. 2. A step is provided between the inner circumferential surface of the outer cylindrical body and the base of the conical inclined surface, and the step is provided between the slide guide surface of the inner cylindrical body and the conical inclined surface. 2. The extendable structure of a baton according to claim 1, further comprising a step that can be locked to the baton. 3. The extensible structure of a baton according to claim 1, wherein a wear-resistant layer is formed on the inner surface of the outer cylindrical body and the outer surface of the inner cylindrical body. 4. The telescopic structure of a baton according to claim 1, wherein a ring made of a wear-resistant material and having a slide guide surface is attached to the tip of the outer cylinder. . 5. The expandable and retractable baton according to claim 1, wherein a ring made of a wear-resistant material and having a slide guide surface is attached to the rear end of the inner cylindrical body. structure. 6. The conical locking surface of each of the outer cylinder and the inner cylinder has an inclination angle of 1 to 2 degrees. Extendable structure of the baton.