RU1796230C - Ski stick - Google Patents

Abstract

Usage: in sports and for adjusting the length of various products in other areas of the national economy. Summary of the invention: a ski pole comprises a body, a handle, a length adjusting mechanism with a control. It is equipped with a slider made in the form of lower and upper segments and a spring located between them, an additional segmented protrusion and a flexible thread. The length adjusting mechanism is made in the form of a cassette with movable ball elements distributed over the entire length of the adjustment, with the slider installed freely in the through channel of the cassette and kinematically connected to the control element - the drum - by means of a flexible thread. An additional segmented protrusion is mounted on the housing, the cartridge is rigidly connected to the handle, and the latter is mounted on the housing with the possibility of longitudinal movement relative to the latter. The movable cartridge elements are located between the slider and the additional segmented protrusion. The control is mounted on the handle. 1 C.p. f-ly, 13 ill.

Description

The invention relates to techniques for sports, and can also be used in the field of mechanical engineering, for semi-automatic and quick adjustment of the length of, for example, a hand tool.

Known constructions of ski poles of adjustable length, consisting of a body, a handle and a device for adjusting the length.

The change in the length of the ski stick is controlled by a control element, which is a disk, key or other device that can be operated with the fingers of a skier.

A disadvantage of similar devices is the small length adjustment range, the inconvenience of using the device, i.e. the location of the governing bodies requires the cessation of stick work and the attention of the skier to divert the regulatory body.

. A ski stick of adjustable length is known, in which the governing body is located on the handle of the ski stick in a convenient location, and the length adjustment range is quite large.

A drawback of this design of the length adjustment mechanism is that it has only two fixed length positions; minimum and maximum g length control can be performed only in the absence of axial load, because during the shift the ski poles do not work. To switch, first open the friction stop located at the bottom of the handle. This can only be done with the other hand.

Moreover, one switching length requires double access to the latch each

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Doi sticks: release and lock the stopper. Such actions of the skier - changing the trajectory of the hands and the rhythm of their movement - significantly affect the speed, especially when lifting.

The switching device uses torsion springs and rods - switches that carry the full axial load of the ski stick, and therefore heavy, due to their high metal consumption.

At present, when the most stringent weight requirements are imposed on sports equipment, when a fraction of a gram is counted, this design cannot be applied in principle to competitions of any high rank.

Limiting the length adjustment to two extreme positions is also irrational, because the function of the optimal stick length is continuous and smoothly varies over the entire control range, depending on the terrain.

The closest technical solution to this solution is a ski pole of adjustable length. However, the known construction of the ski pole creates additional inconvenience in the adjustment and is not sufficiently safety, as a result, the use of the above known construction of the ski pole 1 is substantially limited.

The aim of the invention is to improve usability and safety.

The goal is achieved in that in the known ski pole of adjustable length, consisting of a body, a handle, a control mechanism and a control element, the control mechanism is located in the handle and is made in the form of a cassette with movable elements distributed over the entire length of the control. These movable elements fix the length of the ski stick using a slider placed in. cassette channel. The slider is fixed by the control in the form of, for example, a drum driven by a skier’s finger.

The ability to adjust the length of the stick while driving helps reduce track loss. The exclusion of metal-intensive parts from the design facilitates the ski stick.

The accuracy of adjusting the length of the ski stick is ensured by increasing the number of fixed positions of the handle.

Comparison of the claimed solution with other technical solutions did not allow us to identify features distinguishing the claimed technical solution from the prototype, which allows us to conclude that the claimed technical solution meets the criterion of significant differences.

Fig. 1 shows a ski stick length adjustment mechanism, longitudinal section; FIG. 2 is a view along arrow A in FIG. 1; in Fig.3 is a view along arrow B in Fig.1; figure 4 is a view along arrow B in figure 1; on the

5 is a section along G-G in figure 1; Fig. 7 is a fragment of a switching mechanism device, a slider in a locked position; on Fig - slider when moving the stick to increase the length; Fig. 9 is a diagram of efforts to force calculation of a length control mechanism; figure 10 is a graph of the required length of the ski poles, kki from the topography during the classic course of the skier; 11, 12 and 13 - ski pole in

0 the process of adjusting its length.

A ski stick of adjustable length consists of a housing 1. having a segmented protrusion 2, movable in the groove 3. The cassette 4 is a rod with one

5 through a channel 5, in which a slider consisting of lower 6 and upper 7 of equal segments and a spring 8 made of an elastic material, for example polyurethane, moves. Blind holes 9 are made in the cassette, in which the balls are placed 10. The grooves of the handle housing 11 prevent the balls from falling out. The cassette is fastened to the handle housing, for example, by welding, or, in the case of fabrication from plastic, made at the same time handle body. Outside, the handle is covered with a warm elastic coating 12, and the cavities are filled with foamed hard material 13.

The slider device is shown in Fig.7.

0 Two identical segments 6 and 7 face each other with flats 14. The reverse sides of the segments also have flats 15 for interacting with the balls of poses 10. The slider interacts with the drum 16,

5 driven by the skier’s finger through the thread 17, passing in places of bending along the tubular guides 18, 19 and 20, providing a long service life of the thread. Gaskets 21 (see figure 4} serve for

0 to reduce friction of the drum 16 at the points of contact of its side surfaces with the corresponding surfaces of the filler material 13. The axis 22 is used to hinge the drum 16. The axis of the drum 5 is rotated relative to the axis of symmetry of the stick by 15 ° - the angle of the comfortable position of the drum for the thumb.

Figure 4 shows the handle of a stick for the right hand. The thread 17 is wound on discs 23 and 24, made integral with the drum.

When the drum rotates in one direction from one disk, the thread is wound, and on the other wound at the same speed to ensure synchronization of the fixed positions of the slider and the fixed positions of the drum 16, one of which is shown in Fig. 7. The positions of the drum 16 are fixed by the retainer balls 25, spring-loaded with a spring 26, and entering the recesses 27 of the drum 16,

The operation of the ski stick length adjusting mechanism is as follows.

In the fixed position shown in Fig. 7, the segments 6 and 7 are attracted to each other by a spring 8. The stitch force is transmitted to the segmented protrusion 2 of the stick body, fixing the stick from radial and axial play. The force of pressing the stick is received by the upper ball 10A in contact with the segment and transferred to the cartridge 4. The length of the segments is selected so that at any time two balls on different sides of the segment protrusion 2 are in the extended position, preventing /: the segment protrusion from slipping past the limits of the slider.

To measure the length of the stick, it is necessary to rotate the drum 16 by one or several fixed positions, followed by the release of the balls of the lock 25. In this case, the thread 17 will be tensioned on one side of the slide and, by stretching the spring 8, move the lower or upper segment one position. Under the action of the tensioned spring 8, the lower segment tends to regain the position in which the upper and lower segments are brought closer to a minimum distance.

The length of the stick can only be changed by force interactions of the segment ledge 2, through the ball pos. 10A, with the handle of a ski pole. This may be the support of the stick while the skier is moving, or lightly shaking the stick in the axial direction in the absence of movement.

Thus, in order to increase or decrease the length of a ski pole, two actions must be performed:

1. Use your thumb on the drum 16, for example, 3 times (3 positions).

2. To make a forceful impact on the handle by hand, pressing, or sharply pulling it. When running, it is more convenient to do this in 3 steps - at each step, rotate the drum with one click of the lock,

The main task that solves the analysis of the forces arising in the regulation mechanism is to determine the minimum forces required to drive the slider,

5 as well as determining the reinforcement of the slider segments. Consider the operating conditions of the upper segment 7, since this segment operates under the most severe conditions. When a skier’s hand is exposed to the handle of a ski stick when pushing away, this force P of FIG. 9 is perceived through ball 10A

segmented protrusion 2. because Strength acts on the ball - in the axial direction. In view of the fact that the angle of interaction of the protrusion is defined and equal to a, the radial force that is transmitted through the ball 10A to the segment of the slider 7 (force G rad.) Is equal to: Rad P

0 2tga;

Since random loads on the stick can be equal to the weight of the athlete, the force of the ball to press the slide to the wall of the channel 5 at point 01 can reach significant

5 quantities. Because the optimal force on the drum 16, taking into account the gain, due to differences in diameters on the drum should not exceed 0.5 kgf, we can conclude that with a decrease in the length of the ski

With a stick, the mechanism will not switch at the moment of push, but as soon as this force is weakened, there will be no obstacles to the movement of the segment. The angle / is selected from the condition of providing self-braking at

5 contact with the ball, as if this condition is not provided, and the angle / is greater than the friction angle — for materials of a given pair — some axial force component Qi Q-FpT will appear on the wedge, where Q is the vertical component on the wedge, FTp is the friction force of the pair of balls segment 7, which will be counteracted by spring 8. But since the temperature conditions of operation of this spring are very stringent, a large

5, a change in the characteristics of the spring can affect the reliability of the assembly as a whole. Spring stitch force

, 8 must be determined by the condition:

Rruch rpr gpsegm-9pr. where tsegm.-mass

0 segments; dpr - the maximum specified acceleration that the ski stick can perceive according to the conditions of use.

The use of the proposed length adjustment mechanism in the ski pole reduces the time loss on the track by adjusting the length of the ski pole during movement, which positively affects the result of the competition.

Advantages of the invention are to facilitate construction, improve ease of use and eliminate the risk of injury.

Changing the length of the proposed ski stick is accomplished by moving the handle relative to the body of the ski stick. Sliding inward or outwardly from the handle, the ski pole changes its length.

Fig. 11 shows a ski stick of medium length (segmented protrusion 2 is in the middle position of the adjustment range). The length of the ski stick is fixed, as the spring 8 tightens the segments 6 and 7, rigidly fixing the segment ledge 2 through the balls 96 and 9b, respectively, and preventing it from moving to the sides.

Consider the process of adjusting the length of a ski pole, for example, in the direction of shortening its length (see Fig. 12).

To do this, the skier, on the move or a hundred in place, acts with his thumb on the drum 16 with a movement on himself. In this case, the drum will rotate in a clockwise direction, pulling the thread 176 up along the line E. The tension of the thread 176 acts on the slider segment 7 and moves it behind itself, since nothing prevents the segment from moving in this direction, except for the force of the spring 8. If at this time there is no effect on the korggus 1 of the ski pole (push the handle down (while walking) or shake), then segment 6 continues to be in the same position, preventing the protrusion 2 from moving down, since the protrusion 2 does not allow ball 96 go to your channel and about free the passage to segment 6. If the protrusion 2, under any influence, has moved in the direction E, then the segment 6, under the influence of the spring 8, will push the ball 96 into its channel and pass to the next ball 9a, which will necessarily prevent the further advancement of segment 6 The radius of the segmented protrusion and the pitch of the balls are calculated in such a way

so that after jumping another ball, the segment rests in the next one, which is in the same half of the segment ledge, which also excludes biting of the segment. Those. when one of the segments on the sun rests against the next ball with its supporting plane - flats 14 (see Fig. 7), then it is necessarily on the same slope of the segment ledge as the segment of the slider. Thus, jamming of the segment with the ball is avoided.

At the same time, accidental slipping of the segmented protrusion in the opposite direction from the side of the retractable segment 7 is excluded (see FIG. 12).

The spacing of the balls and the length of the segment are selected so that at any time the channel is blocked (see Fig. 5) for the passage of the segmented protrusion 2. /. ,

After exposing the drum 16 and pressing or shaking the handle and the handle, the drum 16 is released. The segments 6 and 7 of the slider are pulled together by a spring 8, eliminating axial and radial play

due to the small angle (and hence the large radial force) of the inclination of the plane of the flats 14 (see Fig.7).

The change in the length of the ski stick in the direction of its increase is shown in Fig. 13. All

the processes occurring in the mechanism are absolutely identical to the previous case, with that. the difference is that the drum 16 needs to be rotated in the opposite direction, the segment 6, carried away by the thread 17a, moves down, and the impact on the ski stick is not done by pressing the handle, but by shaking or, while walking, pulling the stick, which makes any skier after the push.

Claims (2)

1. A ski pole comprising a body, a handle, a ski stick length adjusting mechanism with a control member, characterized in that, in order to improve ease of use and safety, it is equipped with a slider, an additional segmented protrusion and a flexible thread, the slider being consists of lower and upper segments and a spring located between them, and the length adjustment mechanism is made in the form of a cassette with movable ball elements uniformly distributed over the entire length of adjustment, while the cassette is made. hydrochloric channel segments mounted freely slide in the through-channel and kinematically coupled by means of a flexible string with the control body, and an additional segment projection rigidly mounted on the housing with the possibility of contacting with the respective balls, latayuschimis By arranging between them the slider. moreover, the cartridge is rigidly connected to the handle, and the latter is freely mounted on the housing with the possibility of longitudinal movement relative to the latter. Figure 1 2. The ski pole according to claim 1, characterized in that the control element is made in the form of a drum mounted on the handle with the possibility of rotation in a fixed position. Fig L FIG. 5 I  RB U OC296.il FIG. P Fi & 13