JP3192463U - Jump rope grip and jump rope equipped with it - Google Patents

Abstract

Centrifugal force generated by the rotation of a string pulls the string, thereby increasing the friction between the string and the grip. A jump rope grip that reduces this friction and realizes smooth string rotation is provided.
A jump rope grip includes a rope insertion opening 2b for inserting a rope jump rope provided at one end, a cavity connected to the string insertion opening 2b, and a rolling element support lower portion 2c which is a recess provided in an inner wall of the cavity. A rolling body support lower portion, a plurality of rolling bodies provided in the rolling body support lower portion 2c, and a shaft part 3 which is a cylindrical body press-fitted from the cavity toward the string insertion opening 2b. The maximum diameter of the rolling element is larger than the depth of 2c, and the rolling part support upper part 3a, which is a recess that forms a space surrounding the plurality of rolling elements, is provided on the outer wall of the shaft part 3 together with the rolling element support lower part 2c. The contact portions when the shaft part 3 is press-fitted are the jaw portion 3b on the string insertion opening side of the rolling element support upper portion 3a and a plurality of rolling elements.
[Selection] Figure 1

Description

  The present invention relates to a jump rope grip having a bearing structure.

  When performing a jump rope exercise, the spinning rope rope is pulled outward by centrifugal force. As a result, the string and the grip come into strong contact with each other, resulting in frictional resistance. This frictional resistance hinders smooth rotation of the string, and the rotation of the string becomes an unnatural movement, and a smooth jump rope movement cannot be performed. In particular, when performing a double jump or the like, the string rotates faster, and the centrifugal force increases in proportion to the square of the rotation speed, so that the movement of the string becomes further unnatural.

  In order to solve the above problems, a structure has been proposed in which a spherical head of a rotating body having a spherical head and an arm-like claw is connected to the grip body via a holding portion, and is connected to a rope by the arm-like claw. ing. In this structure, since the spherical head can freely perform a conical motion and a rotational motion with respect to the holding portion, the rotation of the string is performed smoothly (for example, Patent Document 1).

JP-A-9-215770

  In the grip structure disclosed in Patent Document 1 described above, since the spherical head contacts the holding portion, the contact resistance is reduced, but when the string is rotated at a high speed, a contact resistance that cannot be ignored occurs. End up.

In addition, since the holding portion is fixed by fitting into a recess provided in the grip body, it is easy to come off due to the centrifugal force generated on the string. Since the spherical head is also fixed by fitting into the holding part, there is a similar problem.
Furthermore, since the length of a string cannot be adjusted, it was unsuitable for the use which several people with different physiques share and use.

A jump rope grip according to claim 1 of the present invention is a jump rope grip having a bearing mechanism, a string insertion opening for inserting a rope jump rope provided at one end, a cavity connected to the string insertion opening, A grip body having a rolling element support lower portion which is a recess provided in an inner wall of the cavity;
A plurality of rolling elements provided at the lower part of the rolling element support;
A shaft part that is a cylindrical body press-fitted from the cavity toward the string insertion opening,
With
The maximum diameter of the surface perpendicular to the rotation axis of the rolling element is larger than the depth of the rolling element support lower part,
On the outer wall of the shaft part, together with the rolling element support lower part, there is provided a rolling element support upper part that is a recess forming a space surrounding the plurality of rolling elements,
The contact portion when the shaft part is press-fitted is the jaw portion on the string insertion opening side of the rolling element support upper part and the plurality of rolling elements.

  The jump rope grip according to claim 2 of the present invention is characterized in that the rolling element is a spherical body or a roller of a rotating body.

  The jump rope grip according to claim 3 of the present invention is characterized in that the grip body includes a grip front portion having the string insertion opening and the rolling element support lower portion, and a grip rear portion detachably fixed to the grip front portion. And a section.

  The jump rope grip according to claim 4 of the present invention is characterized in that the grip body, the plurality of rolling elements, and the shaft part are made of resin.

  The jump rope grip according to claim 5 of the present invention is characterized in that the vicinity of the rolling element support lower portion of the grip body is transparent or translucent.

  The jump rope according to claim 6 of the present invention includes a jump rope grip, a string, and a string stopper.

Since the jump rope grip according to the present invention is configured as described above, it has the following excellent features.
First, since the bearing mechanism was provided, the problem of contact resistance between the string and the grip could be solved. That is, in the jump rope exercise, the rotation of the string becomes smooth, so that the jump rope can be enjoyed rhythmically without stress. Especially when double jumping or turning a string at high speed, the centrifugal force becomes very large, and there is a concern about the contact resistance between the string and the grip, but even in such a case, smooth string rotation is realized. it can.

Secondly, since the shaft part and the plurality of rolling elements restrain each other, a bearing mechanism can be realized with a small number of parts.
Thereby, the manufacturing cost can be greatly reduced.

Third, since the direction of the centrifugal force acting on the string is opposite to the direction in which the shaft part comes off, the shaft part does not come off during movement. Moreover, even if the grip is dropped, the shaft part does not come off due to the impact.
Fourth, the length of the string can be adjusted to an optimum length according to the physique.
In addition, it has many advantages shown in the embodiments.

It is sectional drawing of the grip of a jump rope concerning this invention. It is a figure for demonstrating the assembly method of the jump rope grip which concerns on this invention. It is sectional drawing at the time of letting the string of the rope of a jump rope concerning this invention pass. It is a figure for demonstrating the bearing mechanism of the jump rope grip which concerns on Embodiment 2 of this invention. These are various types of rollers that can be used in the bearing mechanism of the jump rope grip according to Embodiment 2 of the present invention.

Embodiment 1 FIG.
The configuration of the jump rope grip according to the present invention will be described below with reference to the drawings. The following description discloses a good example related to the present invention, and the present invention is not limited to the embodiment. For example, the materials, dimensions, and the like of the device disclosed in the present embodiment are merely a good example, and other possibilities are not denied.

First, the configuration of a jump rope grip according to the present invention will be described with reference to the drawings. In particular, the bearing mechanism that is the essence of the present invention will be described in detail.
FIG. 1 is a cross-sectional view of a rope skipping grip insertion side.
The grip includes a grip body including a grip rear portion 1 and a grip front portion 2, a shaft part 3, a plurality of spheres 4, and the like. Among these, a bearing mechanism is formed by the grip front portion 2, the shaft part 3, and the plurality of spheres 4 that are rolling elements.

The grip rear portion 1 which is the rear side of the grip body (the side where the little finger is present when gripped) has a cylindrical shape or the like, and the inside is a cavity. Although it does not necessarily need to be a cavity over the entire length, at least the vicinity of the joint with the grip front part 2 is a cavity.
The grip front portion 2 is detachably fixed to the grip rear portion 1. In the present embodiment, fixing is possible using a male screw 1 a provided at the grip rear portion 1 and a female screw 2 a provided at the grip front portion 2.

  The grip front part 2 is a dome-shaped rotating body, and has a string insertion opening 2b through which a rope for jumping rope is passed in the vicinity of the rotation axis. And it has the rolling element support lower part 2c which is a recessed part in the inner wall near the string insertion opening 2b. The concave portion is provided over the entire circumference, and the cross section has, for example, a substantially crescent shape or a substantially half moon shape.

The shaft part 3 is a cylindrical body provided with a cavity for passing a rope for jumping rope in the center. It has a cylindrical shape with a narrow front and wide rear. And the rolling body support upper part 3a which is a recessed part is provided in the outer wall.
As shown in FIG. 1, the shaft part 3 is press-fitted from the inner cavity side of the grip rear part 1 toward the string insertion opening 2b and fixed. In this press-fitted state, the rolling element lower part 2c and the rolling element support upper part 3a surround the plurality of spheres 4, and determine a space in which the plurality of spheres 4 can move.

The plurality of spheres 4 are six spheres in the present embodiment. These spheres also serve as rolling elements in the bearing mechanism. In principle, two or more spheres are required. In order to realize a good bearing mechanism, it is better to use a larger number of spheres. For example, if six spheres are used as in the present embodiment, a sufficiently good bearing mechanism can be realized.
Further, the diameter of the sphere is larger than the depth of the rolling element support lower portion 2c provided on the inner wall of the grip front portion 2, so that a part of the sphere protrudes upward from the rolling element support lower portion 2c.

The grip rear part 1, the grip front part 2, the shaft part 3, and the plurality of spheres 4 may be made of any material, but in the present embodiment, resin is used. One of the reasons is that it is suitable as a material for components of a bearing mechanism used for a jump rope grip, as well as being easy to mass-produce by injection molding and light weight.

That is, compared with the case where metals contact each other, the contact resistance becomes relatively large when the resins contact each other. In the bearing mechanism, the greater the contact resistance between the components, the more firmly the motion is transmitted between the components without causing side slipping or idle rotation.
On the other hand, deterioration of resin due to wear becomes a problem, but the bearing mechanism used for the jump rope grip does not require much accuracy and life compared to machining equipment, etc. It doesn't matter at all.

A translucent resin was used as the grip front portion 2.
By making the resin near the lower part of the rolling element support transparent or translucent, the bearing mechanism can be visually recognized from the outside, so that visual enjoyment can be provided. In addition, various designs can be created by coloring the sphere.

Next, a method for assembling the bearing mechanism will be described with reference to FIG.
First, as shown in FIG. 2A, the plurality of spheres 4 are installed on the rolling element support lower portion 2c provided on the inner wall of the grip front portion 2. Then, the shaft part 3 is inserted from the inner cavity side of the grip rear part 1 toward the string insertion opening 2b. At this time, the jaw 3b on the side of the string insertion opening 2b of the rolling element support upper portion 3a abuts on the plurality of spheres 4.

If the shaft part 3 is strongly pressed in the direction of arrow A from this state, the tip of the shaft part 3 is distorted in the direction of arrow B, and the jaw 3b crosses the plurality of spheres 4 as shown in FIG. Furthermore, it enters the string insertion opening 2b side from the plurality of spheres 4, and the distortion of the tip portion of the shaft part 3 is eliminated.
In the state of FIG. 2 (i), since the jaw part 3b is restrained by the plurality of spheres 4, the shaft part 3 does not come off. On the other hand, since the plurality of spheres 4 are constrained by the space surrounded by the rolling element support lower portion 2c and the rolling element support upper portion 3b, they are never detached.
Thus, since the shaft part 3 and the plurality of spheres 4 have a structure in which they are constrained to each other, a bearing mechanism can be realized with a small number of parts.

  The skipping string 5 is passed through the bearing mechanism thus completed, and the threaded string 5 is fixed to the string stopper 6. And the state which screwed the grip back part 1 to the grip front part 2 is FIG.

The string stopper 6 may have any structure as long as the string 5 can be firmly fixed. In particular, a structure capable of fixing an arbitrary portion of the string is desirable, and thereby the length of the string can be adjusted according to the physique of the user.
Further, the shape of the cross section perpendicular to the string 5 of the string stopper 6 is narrower than the opening part on the opposite side to the string insertion opening side of the shaft part 3. This is to avoid contact with the inner wall of the main body rear portion 1.

When the jump rope movement is performed with the jump rope having the grip shown in FIG. 3, the string 5 is pulled upward in FIG. 3 by the centrifugal force accompanying the rotation of the string 5. Then, the string stopper 6 fixing the string 5 is also pulled upward, and the shaft part 3 is pushed upward. Therefore, the shaft part 3 never comes off during the jump rope movement.
Even when the grip is dropped, the impact on the entire grip does not act as a force that distorts the shaft part 3 in the direction of arrow B in FIG.

As described above, in the present embodiment, an optimal example of a jump rope grip has been shown, but the present invention is not limited to this example.
For example, the coupling method of the grip rear part 1 and the grip front part 2 forming the grip body is not limited to screwing. It may be fixed by fitting, an external locking mechanism may be provided, or the coupling force of magnets may be used. Any method may be used as long as it can be detachably fixed.

  Further, the grip main body does not necessarily have to be a separate unit such as the rear portion 1 and the grip front portion 2. For example, the grip body may be integrated and the other end different from the string insertion opening 2b may be opened. The press-fitting of the shaft part 3 and the fixing of the string 5 by the string stopper 6 can be performed from the released other end. However, with respect to the press-fitting of the shaft part 3, the work becomes easier when the part close to the press-fitted part is opened, so that the grip body is divided into two pairs of the rear part 1 and the grip front part 2 as in the present embodiment. It is better to have a configuration.

The features of the present invention are summarized below.
First, since the bearing mechanism was provided, the problem of contact resistance between the string and the grip could be solved. That is, in the jump rope exercise, the rotation of the string becomes smooth, so that the jump rope can be enjoyed rhythmically without stress. Especially when double jumping or turning a string at high speed, the centrifugal force becomes very large, and there is a concern about the contact resistance between the string and the grip, but even in such a case, smooth string rotation is realized. it can.

Secondly, since the shaft part and the plurality of spheres are structured to restrain each other, a bearing mechanism can be realized with a small number of parts.
Thereby, the manufacturing cost can be greatly reduced.

Third, since the direction of the centrifugal force acting on the string is opposite to the direction in which the shaft part comes off, the shaft part does not come off during movement. Moreover, even if the grip is dropped, the shaft part does not come off due to the impact.
Fourth, the length of the string can be adjusted to an optimum length according to the physique.

  Fifth, since the grip body is composed of two bodies, the press-fitting work of the shaft parts becomes easy, and the press-fitting of the shaft parts can be surely performed in the manufacturing process.

Sixth, since the parts constituting the bearing mechanism of the grip are made of resin, idling and slipping can be reduced, and a reliable and efficient bearing mechanism can be realized.
On the other hand, the disadvantage of the resin that it is easily worn is not a problem at all as a bearing mechanism for a jump rope grip.
Furthermore, mass production is easy and the manufacturing cost is low. Weight reduction is also possible.
Various colors and designs can be realized.

  Seventh, by making the vicinity of the rolling element support lower part of the grip body transparent or translucent, the bearing mechanism can be visually recognized from the outside and the mechanism can be enjoyed.

Embodiment 2. FIG.
The configuration of the jump rope grip according to Embodiment 2 of the present invention will be described below with reference to the drawings.
4A and 4B are diagrams for explaining a bearing mechanism of a jump rope grip, wherein FIG. 4A is a cross-sectional view, and FIG. 4A is a top view of the cylindrical roller 4a as viewed from the top of the page in FIG.

A difference from the jump rope grip according to the first embodiment is that a plurality of cylindrical rollers 4 a are used as rolling elements instead of the plurality of spheres 4. There is no difference with respect to other configurations, assembly methods, and operations.
As described above, even if a plurality of cylindrical rollers 4a are used instead of the plurality of spheres 4, the present invention can be similarly realized and can have many advantages described in the first embodiment.

  Moreover, you may use the roller of a different shape shown in FIG. 5 instead of the some cylindrical roller 4a. For example, FIG. 5 (A) is a cylindrical roller, FIG. 5 (I) is a tapered roller, and FIG. 5 (U) is a barrel roller. Thus, you may use the roller of various rotary bodies as a rolling element.

In order to have a structure in which the shaft part 3 and the plurality of rolling elements restrain each other, it is necessary to make the maximum diameter of the rolling element rollers larger than the depth of the rolling element support lower portion 2c. This is because the jaw 3b and the rolling element come into contact with each other. Note that the maximum width of the rolling element roller is the maximum diameter of the surface perpendicular to the rotation axis, as indicated by the dotted arrow in FIG.
In the case of the sphere shown in the first embodiment, the maximum diameter of the surface perpendicular to the rotation axis is the diameter of the sphere.

1 Grip rear part 1a Male thread
2 grip front part 2a female screw 2b string insertion opening 2c rolling element support lower part 3 shaft part
3a Rolling element support upper part 3b Jaw part 4 Sphere 4a Cylindrical roller 5 String
6 Strapping

Claims (6)

A jump rope grip having a bearing mechanism,
A string insertion opening for inserting a jump rope string provided at one end;
A cavity connected to the string insertion opening;
A rolling element support lower portion which is a recess provided in the inner wall of the cavity;
A grip body having
A plurality of rolling elements provided at the lower part of the rolling element support;
A shaft part that is a cylindrical body press-fitted from the cavity toward the string insertion opening,
With
The maximum diameter of the surface perpendicular to the rotation axis of the rolling element is larger than the depth of the rolling element support lower part,
On the outer wall of the shaft part, together with the rolling element support lower part, there is provided a rolling element support upper part that is a recess forming a space surrounding the plurality of rolling elements,
A rope jumping grip characterized in that the contact part when the shaft part is press-fitted is the jaw part on the string insertion opening side of the rolling element support upper part and the plurality of rolling elements. The jump rope grip according to claim 1, wherein the rolling element is a sphere or a roller of a rotating body. The grip body is
A grip front portion having the string insertion opening and the rolling element support lower portion;
The jump rope grip according to claim 1 or 2, further comprising: a grip front portion and a grip rear portion fixed detachably. The jump rope grip according to any one of claims 1 to 3, wherein the grip body, the plurality of rolling elements, and the shaft part are made of resin. The jump rope grip according to claim 4, wherein the vicinity of the rolling element support lower portion of the grip body is transparent or translucent. A jump rope grip according to any one of claims 1 to 5,
String,
Rope skipping with a string stopper.