JP6421353B1 - MASSAGE BALL AND MASSAGE BALL MANUFACTURING METHOD - Google Patents

Abstract

An object of the present invention is to provide a new massage ball that has both a use as a toy and a high usability as a massage device. A main body portion 16 includes a lower layer portion 12 constituting a lower layer and an upper layer portion 11 constituting an upper layer. The upper layer portion 11 has a specific gravity smaller than that of the lower layer portion 12, and has a center of gravity. Is located below the center of curvature of the bottom curved surface, the substantially spherical massage ball 1. [Selection] Figure 2

Description

  The present invention relates to a massage ball and a method for manufacturing a massage ball.

When the uterus contracts due to labor pains, there is a force that pushes the fetus out, but it can be boosted by struggling. When headache begins and the fetal head descends, the fetal head stimulates the nerves near the mother's tailbone, creating a desire for the mother to “live”. However, if the uterine ostium is not fully open, it may cause troubles such as tearing of the cervix and vagina or hypotension of the fetus. Therefore, until the opening of the uterus is fully opened, it is necessary to suppress the desire to live when labor occurs, that is, to “live away”. It is said that this “missing miss” is more painful than labor, although there are individual differences.
As a method of evacuation due to labor pain, there are known a method of relaxing and relieving pain by taking a breathing method and an easy posture, a method of pressing a golf ball or a tennis ball near the anus, and the like.

  In addition, various changes in physical condition appear in pregnant women. Low back pain is one of them, and causes of onset include changes in hormone balance, secretion of birth hormones, changes in posture, muscle weakness due to lack of exercise, mental stress, and the like. As a method for eliminating or reducing back pain, a method of pressing a tennis ball near the pelvis is generally used.

  Golf balls and tennis balls are readily available, but are not intended for use as massage devices, and the acupressure strength cannot be adjusted according to the user's physical condition or preference.

  As a massage ball that enables adjustment of the acupressure strength, a massage ball in which sliced foam layers having different densities are alternately combined is disclosed (Patent Document 1). In addition, a massage ball is disclosed in which a weight is embedded in the massage ball to improve the acupressure effect (Patent Documents 2 and 3).

  By applying a material having elasticity such as silicone to the outside of the massage ball, skin and muscle damage due to excessive finger pressure is prevented, and consideration is given to the safety of the user (Patent Document 3). 4).

  By the way, Patent Document 3 discloses an injection molding method as a method of manufacturing a massage ball whose outer peripheral surface is covered with an elastic member such as silicone. Specifically, the resin material is injected into the mold and molded while a weight embedded in the center of the massage ball is fixed to a predetermined position inside the mold with a pedestal.

Japanese Patent Laid-Open No. 2006-165464 JP 2014-369 A JP 2013-106730 A JP 2011-110409 A

  Conventional massage balls are only used as massage devices, and elements as toys have not been incorporated into the structure.

  Further, a massage ball having a coating layer made of an elastic member such as silicone on the outer peripheral surface is generally manufactured by an injection molding method or a die press method as disclosed in Patent Document 3. . In these methods, the main body inside the coating layer is exposed to high temperature and high pressure. Thereby, there existed a problem that a main-body part will melt | dissolve or deform | transform.

In view of such a problem, an object of the present invention is to provide a new massage ball that achieves both a use as a toy and a high usability as a massage device.
It is another object of the present invention to provide a novel manufacturing technique for a massage ball covered with an elastic member.

The present invention for solving the above problems comprises a main body,
The main body has a lower layer constituting the lower layer and an upper layer constituting the upper layer,
The upper layer part has a lower specific gravity than the lower layer part,
A substantially spherical massage ball characterized in that the center of gravity is located below the center of curvature of the bottom curved surface.

In the massage ball of the present invention, the main body part that affects the touch when pressed is composed of a plurality of materials (upper layer part and lower layer part) having different specific gravities, so that the acupressure strength can be adjusted. In addition, the lower layer has a higher specific gravity than the upper layer, and the center of gravity is located below the center of curvature on the bottom curved surface, so even if it rolls or falls, it returns to its original state like a `` getting up lawyer '', as a toy It can also be used.
In other words, the massage ball of the present invention achieves both high usability as a massage instrument and use as a toy due to the technical feature of having an upper layer and a lower layer having different specific gravities as the structure of the main body. .

In a preferred embodiment of the present invention, the curvature radius of the bottom curved surface is larger than the curvature radius of the top curved surface.
In this way, the “oval shape” having a large curvature radius of the bottom curved surface can improve the operability as a hobbyist. Further, by making a difference in the radius of curvature, a difference occurs in the pressure per unit area when the bottom curved surface and the top curved surface are pressed against the body. Thereby, according to a user's physical condition or preference, the strength of acupressure can be selected and massage can be performed.

In preferable embodiment of this invention, the hardness of the said upper layer part is higher than the said lower layer part.
By making the difference in hardness, massage can be performed by selecting the strength of the acupressure according to the physical condition or preference of the user.

In preferable embodiment of this invention, a hard member is provided in the surface of the said upper layer part or the said lower layer part.
By setting it as the form which has a hard member on the surface, stronger finger pressure intensity | strength can be obtained and it contributes to the improvement of a massage effect.

In preferable embodiment of this invention, the coating layer which consists of an elastic member which coat | covers the outer peripheral surface of the said main body core part is provided.
By covering the outer peripheral surface with the elastic member, it is possible to prevent wear of the main body and separation of the upper layer portion and the lower layer portion, and the massage ball can be kept hygienic.

Further, the present invention is a method for manufacturing the massage ball described above,
A step of producing a hollow reversal covering material made of an elastic member having an opening and having a form in which the covering layer is reversed;
And a step of covering the main body with the reverse covering material while reversing the reverse covering material.
In the conventional injection molding method and mold press method, there is a problem that the main body is exposed to high temperature and high pressure to be modified and deformed. The manufacturing method of the present invention solves this problem, and can easily manufacture a massage ball having a coating layer made of an elastic member without damaging the main body.

  When the main body portion is a thermoplastic resin, problems due to the injection molding method or the die press method are significant. Therefore, this invention is suitable when a main-body part is a thermoplastic resin.

ADVANTAGE OF THE INVENTION According to this invention, the massage ball which compatible the use as a toy and the high usability as a massage instrument can be provided.
Moreover, the manufacturing method of this invention enables manufacture of the massage ball which has a coating layer which consists of an elastic member, without damaging a main-body part.

It is a perspective view of a massage ball concerning an embodiment of the present invention. It is sectional drawing of the massage ball which concerns on embodiment of this invention. It is sectional drawing of the massage ball which concerns on embodiment of this invention. It is sectional drawing which shows the manufacturing method of the massage ball which concerns on this invention. It is sectional drawing showing the process which covers a main-body part, inverting an inversion coating | covering material.

  Hereinafter, with reference to FIGS. 1-3, the massage ball which concerns on embodiment of this invention is demonstrated in detail. The following embodiment is an example of the present invention, and the present invention is not limited to the following embodiment.

As shown in FIG. 2, the massage ball 1 has a main body portion covered with a covering layer made of an elastic member 13. The main body portion includes an upper layer portion 11 constituting an upper layer and a lower layer portion 12 constituting a lower layer.
FIG. 2 illustrates a form in which the joint surface between the upper layer portion 11 and the lower layer portion 12 is a plane. However, the joint surface does not need to be a flat surface, and the form is not particularly limited as long as the upper layer portion 11 and the lower layer portion 12 can be joined, and may be a surface having irregularities.

  The upper layer portion 11 and the lower layer portion 12 may be joined by any method, and can be appropriately selected depending on the material of the upper layer portion 11 and the lower layer portion 12. Specifically, adhesion with an adhesive, thermal fusion, and the like can be suitably exemplified.

As shown in FIG. 2, a concave portion 18 is provided on the upper top portion of the upper layer portion 11. A convex portion 19 provided on the inner wall surface of the elastic member 13 is fitted into the concave portion 18 to prevent the elastic member 13 from shifting with respect to the main body portion 16.
Moreover, the recessed part 18 provided in the upper layer part 11 and the convex part 19 of the elastic member 13 play an important role also in the manufacturing method mentioned later.

The upper layer part 11 is equipped with the hard member 14 on the surface (FIG. 2). The hard member 14 may be provided in any region on the surface of the main body portion 16, but is preferably provided at the apex of the upper layer portion 11 as shown in FIG. 2. Thereby, it becomes possible to obtain a strong stimulus in the massage performed using the top curved surface of the massage ball 1.
The hard member 14 is located in the gap between the main body portion 16 and the elastic member 13 in a state where the hard member 14 is fitted in the concave portion 18 of the upper layer portion 11.

  In addition, as shown in FIG. 2, providing the recessed part 18 in the upper layer part 11 is not essential. The upper layer portion 11 may have a hemispherical structure without unevenness.

The lower layer portion 12 is provided with a recess 20 corresponding to the lid body 17. Thereby, the clearance gap between the coating layers formed by the elastic member 13 can be tightly closed by the lid body 17, and the lid body 17 can be prevented from coming off.
The lid 17 plays an important role in the manufacturing method described later. If the massage ball 1 is manufactured by an injection molding method or a die press molding method, the lid 17 is not necessary. In this case, the lower layer portion 12 may have a hemispherical structure without unevenness.

The upper layer portion 11 and the lower layer portion 12 have different specific gravities. The specific gravity of the upper layer portion 11 is smaller than the specific gravity of the lower layer portion 12. Due to the difference in specific gravity between the upper layer and the lower layer, the center of gravity of the massage ball 1 is biased. Specifically, the center of gravity of the massage ball 1 is configured to be positioned below the center of curvature on the bottom curved surface.
With this configuration, the massage ball 1 rises spontaneously and converges to a certain position like a small lawyer.

  The composition ratio and specific gravity difference between the upper layer portion 11 and the lower layer portion 12 in the main body portion 16 are not particularly limited, and can be appropriately adjusted within a range where the center of gravity of the massage ball 1 is located below the center of curvature of the bottom curved surface.

  Although the material of the upper layer part 11 and the lower layer part 12 is not specifically limited, For example, general purpose foams, such as a polystyrene, polyethylene, a polypropylene, a polyvinyl chloride, a polyurethane, ethylene vinyl acetate, are used suitably. By using a foam, a soft tactile sensation can be obtained and the weight can be reduced.

Although the hardness of the upper layer part 11 and the lower layer part 12 is not specifically limited, It is preferable to make a difference in hardness between these two layers. Preferably, the hardness of the upper layer portion 11 is set higher than that of the lower layer portion 12. Thereby, in the massage using the massage ball 1, the user can adjust acupressure strength suitably.
As shown in FIGS. 1 and 2, when the top curved surface has a smaller radius of curvature than the bottom curved surface, it is preferable to set the hardness of the upper layer portion 11 high. Thereby, when the top curved surface of the massage ball 1 is used, it becomes possible to massage with stronger acupressure strength.

  The massage ball 1 includes a coating layer made of an elastic member 13 that covers the outer peripheral surface of the main body 16. Considering that it is possible to select the strength of the finger pressure strength by providing the upper layer portion 11 and the lower layer portion 12 having different specific gravity, the thickness of the elastic member 13 is preferably 1 mm to 10 mm, more preferably 2 mm. By setting it to ˜5 mm, the difference in acupressure can be experienced more strongly.

  The material of the elastic member 13 is not particularly limited. For example, natural rubber or isoprene rubber, butadiene rubber, urethane rubber, fluorine rubber, silicone rubber or other synthetic rubber, or plastic such as polyvinyl chloride is preferably used. From the viewpoint of low odor, deterioration resistance and weather resistance, silicone rubber is more preferable.

  As described above, the massage ball 1 includes the hard member 14 between the elastic member 13 and the side surface portion of the second member 12 (FIG. 2). Although the material of the hard member 14 is not particularly limited, for example, polyamide, polyacetal, polycarbonate, polyphenylene ether, ABS resin, or the like is preferably used.

The massage ball 1 is configured such that the center of gravity is located below the center of curvature of the bottom curved surface due to the difference in specific gravity between the upper layer portion 11 and the lower layer portion 12, and it is possible to get up even if it does not have a weight and to act as a lawyer To do. Thus, although a weight is not necessary, a weight may be provided inside the main body portion to improve the operability of the rising lawyer.
In this case, as shown in FIG. 3, a weight 15 may be embedded in the lower layer portion 12.

  Although the material of the weight 15 is not particularly limited, for example, an inexpensive heavy metal such as iron or lead is preferably used.

  The size of the massage ball 1 is not particularly limited, but is preferably in the range of 5 cm to 8 cm in height and 5 cm to 8 cm in width from the viewpoint of usability.

  The shape of the massage ball 1 may be a perfect sphere or an ellipsoid. As shown in FIGS. 1 to 3, it is preferable that the curvature radius of the bottom curved surface is an oval shape that is larger than the curvature radius of the top curved surface. By adopting an oval shape, the pressure per unit area applied to the human body during massage can be differentiated between the top curved surface and the bottom curved surface of the massage ball 1, and the user can adjust the acupressure strength.

  The massage ball 1 can be used in the same manner as a normal massage ball. The usage method which hold | grips the massage ball 1 with a hand and presses this to a neck part, a shoulder part, a back part, an abdomen, a buttocks, an upper limb, a lower limb, etc. can be illustrated typically. In particular, it is preferable to use the massage ball 1 for the purpose of “live-in” that presses the vicinity of the anus during labor.

  In addition, the acupressure effect can be obtained by aligning the position of the massage ball 1 placed on the floor with the waist and taking a posture of lying on its back. Because the massage ball 1 gets up and takes the action of a lawyer, it does not roll when placed on the floor and converges to a certain position, so it is easy to fit the waist to the position of the massage ball 1 when lying on its back There is also an effect.

  The massage ball 1 can be applied to any person having stiffness or pain regardless of gender. In order to relieve labor pains and labor pains, it is common for pregnant women to use a tennis ball or the like for massage, particularly for the purpose of “live-in”, and the massage ball 1 is suitable for this purpose.

  In addition, the massage ball 1 swings like a “getting up gambler” and can be used as a toy for infants for a long time after giving birth, so it can be recommended for use by pregnant women.

Hereinafter, a method for manufacturing a coated article that can be applied to the method for manufacturing the massage ball 1 described above will be described in detail with reference to FIGS.
In the conventional injection molding method and die press molding method, when a coated article having a coating layer of an elastic member is manufactured, the main body portion accommodated in the coating layer is exposed to high temperature and high pressure, so that the modification or There was a problem of deformation. The manufacturing method of the present invention solves such problems.

The present invention is a method for manufacturing a coated article comprising a body layer 16 and a coating layer made of an elastic member 13 that covers the outer peripheral surface of the body portion 16.
A step of producing a hollow reversal covering material 21 made of an elastic member 13 having an opening 22 and having a form in which the covering layer is reversed;
A step of covering the body portion 16 with the reversal covering material 21 while reversing the reversal covering material 21.

  Examples of the coated article include not only the massage balls described above but also toys, dolls, figurines, sports equipment, beauty equipment, health equipment, and the like. The shape is not limited, and examples thereof include a cone, a column, and a regular polyhedron.

  Moreover, it is preferable to apply the manufacturing method of this invention when the main-body part 16 which is the content of a coated article is weak to heat, and it is difficult to apply the injection molding method or the die press molding method. Specifically, when the main body 16 is a thermoplastic resin such as polystyrene, polyethylene, polypropylene, polyvinyl chloride, polyurethane, or ethylene vinyl acetate, the manufacturing method of the present invention is suitable. .

  The reverse covering material 21 has a form in which the covering layer in the coated article is reversed. When the coated article has a substantially spherical shape like the massage ball described above, the outer shape of the reversal covering material 21 also has a substantially spherical shape. That is, the outer shape of the reversal coating material 21 is appropriately designed according to the shape of the coated article to be manufactured.

  Further, the reversal covering material 21 takes a hollow form with an opening 22. Since the reversal covering material 21 is made of the elastic member 13, the opening 22 is naturally stretchable. Therefore, in the covering step described later, the opening 22 can be reversely covered while being widened, so that the diameter of the opening 22 may be smaller than the maximum diameter of the main body 16.

  The reversal covering material 21 can be manufactured using any known resin molding method such as an injection molding method or a die press molding method. The reverse covering material 21 may be manufactured by molding the elastic member 13 in the same shape as the covering layer and inverting it.

In the present invention, as shown in FIG. 5, the main body part 16 is covered with the reverse covering material 21 while the reverse covering material 21 is reversed. Specifically, the main body portion 16 is brought into contact with a portion of the reverse covering material 21 that is opposite to the opening 22 (FIG. 5A), and the main body portion 16 is fitted into the reverse covering material 21 (FIG. 5B). ), The main body 16 having a coating layer already formed in the opening 22 is swallowed (FIG. 5C), and the whole is covered (FIG. 5D).
When the diameter of the opening 22 of the reversal covering 21 is smaller than the maximum diameter of the main body 16, the main body 16 is fitted into the reversal covering 21 while widening the opening 22 (FIG. 5 (c)). .

  As shown in FIG. 4, the elastic member 13 is provided with a convex portion 19 at a portion corresponding to the inner side of the coating layer (that is, the outer side of the reverse coating material 21), and this is fitted into the concave portion 18 provided in the main body portion 16. However, it is preferable to cover the main body portion 16 as a starting point of reversal of the reversal covering material 21.

  Further, the elastic member 13 is provided with a concave portion in the portion corresponding to the inner side of the coating layer (that is, the outer side of the reverse covering material 21), and is fitted to the convex portion 19 protruding from the main body portion 16. It is good also as a form which coat | covers the main-body part 16 as a starting point of inversion of the material 21. FIG.

  When the hard member 14 is provided in the gap between the main body portion 16 and the covering layer, the hard member 14 is brought into contact with the surface of the main body portion 16 before the covering is started. The concave portion 18 of the main body portion 16 can be a joint portion with the hard member 14.

After the coating is completed, the opening 22 of the reversal coating material 21 remains in the coating layer of the coated article. Preferably, a closing step of closing the opening 22 with the lid 17 is preferably performed.
In order to close the mouth by the lid body 17, it is preferable to provide a surface (see FIG. 4) corresponding to the lid body 17 and a recess 20 in the lower part of the main body portion 16.

  The present invention can be applied to massage balls and methods for manufacturing massage balls.

DESCRIPTION OF SYMBOLS 1 Massage ball 11 Upper layer part 12 Lower layer part 13 Elastic member 14 Hard member 15 Weight 16 Main body part 17 Lid body 18 Concave part 19 Convex part 20 Concave part 21 Reverse covering material 22 Opening part

Claims (7)

With a body,
The main body has a lower layer constituting the lower layer and an upper layer constituting the upper layer,
The upper layer part has a lower specific gravity than the lower layer part,
The center of gravity is located below the center of curvature on the bottom curved surface ,
A substantially spherical massage ball characterized in that a curvature radius of the bottom curved surface is larger than a curvature radius of the top curved surface . With a body,
The main body has a lower layer constituting the lower layer and an upper layer constituting the upper layer,
The upper layer part has a lower specific gravity than the lower layer part,
The center of gravity is located below the center of curvature on the bottom curved surface,
A substantially spherical massage ball , wherein the hardness of the upper layer portion or the lower layer portion is higher than the other . The massage ball according to claim 2 , wherein the hardness of the upper layer portion is higher than that of the lower layer portion . With a body,
The main body has a lower layer constituting the lower layer and an upper layer constituting the upper layer,
The upper layer part has a lower specific gravity than the lower layer part,
The center of gravity is located below the center of curvature on the bottom curved surface,
A substantially spherical massage ball comprising a coating layer made of an elastic member covering the outer peripheral surface of the main body .   The massage ball according to any one of claims 1 to 4, comprising a hard member on a surface of the upper layer part or the lower layer part. It is a manufacturing method of the massage ball according to claim 4 ,
A step of producing a hollow reversal covering material made of an elastic member having an opening and having a form in which the covering layer is reversed;
A step of covering the main body with the reverse covering material while reversing the reverse covering material. The manufacturing method according to claim 6 , wherein the main body portion is a thermoplastic resin.