KR20240013589A - Sports ball warmer - Google Patents

Abstract

The present invention provides heating to maintain the elasticity of sports balls (B) such as tennis balls, golf balls, baseballs, etc. in sports that can be enjoyed even in winter, such as tennis, golf, and baseball, and also functions as a storage case. This is an invention regarding a sports ball warmer that allows this to be done.

Description

Sports ball warmer {SPORTS BALL WARMER}

The present invention relates to a sports ball warmer, and more specifically, to a storage case that warms and maintains the elasticity of sports balls such as tennis balls, golf balls, and baseballs in sports such as tennis, golf, and baseball that can be enjoyed even in winter. It is about a sports ball warmer that can perform even the functions of.

In general, there are a variety of sports balls, such as tennis balls, golf balls, and baseball balls. These sports balls are sports that can be enjoyed outdoors, so there is no problem in exercising in warm weather in spring, summer, and fall, but in low temperatures in winter, sports balls can be played outdoors. It is difficult to maintain the elasticity of the ball, leading to difficulties such as limited distance and wrist injuries.

Accordingly, a variety of products have been developed that heat the sports balls themselves so that people can enjoy the sports balls to their heart's content even in the winter.

Figure 1 is a vertical cross-sectional view and a flat cross-sectional view showing a portable tennis ball storage box according to Prior Art Document 1 (Korean Patent Publication No. 2019-0040148).

The portable tennis ball storage box according to prior art document 1 includes a storage container 230 for storing tennis balls as shown in FIG. 1, a heating means 220 for heating the tennis balls stored in the storage container 230, and an insulating material. Main body 200 including 210; A lid 100 that selectively opens and closes the opening of the storage container 230; It includes an automatic temperature control device 310 configured to control the operating time and operating temperature of the heating means 220, and a control unit 300 including a power supply device 320, and the heating means 220 is a coil. It is characterized as a type heating element or a planar heating element.

However, the portable tennis ball storage box according to prior art document 1 can be heated by the heating means 220 so that the tennis balls in the storage container 230 have elasticity suitable for exercise, but the tennis balls are not in the storage container 230. It has limitations in that it cannot maximize the thermal efficiency of the heating means 220 due to linear contact. In particular, when the main body 200 is turned upside down after opening the lid 100, the tennis balls stored in the storage container 230 fall out at once. A problem that causes inconvenience in use. Furthermore, if the storage container 230 is not filled with tennis balls, the tennis balls move freely within the storage container 230, creating noise (in the case of golf balls, the level of noise is very severe). It has disadvantages.

Figure 2a is an exploded perspective view showing a golf ball case according to prior art document 2 (Korea Public Utility Model Publication No. 2017-0000399), Figure 2b is a cross-sectional view showing a golf ball case according to prior art document 2, and Figure 2c is a cross-sectional view showing a golf ball case according to prior art document 2. This is a perspective view showing the golf ball case according to prior art document 2.

The golf ball case according to prior art document 2 includes a main body 2 with a space formed inside and open at both ends, as shown in FIGS. 2A to 2C, and a lid (2) that is detachably coupled to both ends of the main body 2. 4) and a heating part 6 formed within the main body 2 and heated to increase the temperature of the internal space; The main body 2 is a double wall structure formed by an outer wall 22 and an inner wall 24 spaced apart from the outer wall 22; It has a structure in which an insulating material 27 is accommodated in the space between the inner wall 24 and the outer wall 22.

The heating unit 6 controls the heating wire 62 arranged in a spiral manner in the space between the inner wall 24 and the outer wall 22 of the main body 2, and the battery 71 that supplies power to the heating wire 62. Includes switch 74.

However, the golf ball case according to prior art document 2 can be heated by the heating wire 62 so that the golf ball in the inner wall 24 has elasticity suitable for exercise, but the golf ball is stored too loosely in the inner wall 24. There is a limitation in maximizing the thermal efficiency of the heating wire 62.

On the other hand, the golf ball case according to prior art document 2 includes a tray 8 that is inserted or withdrawn into the main body 2 and has a through hole 80 into which the golf ball 100 is inserted, but the golf ball is inserted into the main body 2. In order to securely store it inside (2), a separate tray (8) must be provided, which has the problem of low productivity due to the complexity of the parts.

Republic of Korea Patent Publication No. 2019-0040148 Republic of Korea Public Utility Model Publication No. 2017-0000399

The purpose of the present invention is to heat sports balls such as tennis balls, golf balls, baseball balls, etc. to maintain their elasticity in sports such as tennis, golf, and baseball that can be enjoyed even in winter, and to perform the function of a storage case. Providing ball warmers.

The purpose of the present invention is to allow a sports ball to come into contact with a bending ring bent inward in an arc shape on a cylindrical main conductor, so that the heat of the main heating element is not only heated through the air in the cylindrical long groove and the cylindrical short groove through conduction of the cylindrical main conductor. In addition, we provide a sports ball warmer that maximizes the warming efficiency of sports balls by realizing direct warming by contact with the band using a bending ring.

The purpose of the present invention is to prevent a sports ball from shaking or rolling even if it is not full by being held in a bending ring and embedded in a cylindrical main conductor, making noise when carrying it (especially when it is a hard golf ball, the noise is loud). ) to provide a sports ball warmer that can prevent the occurrence of.

The purpose of the present invention is to round and grip the main plate into a cylindrical shape so that both ends overlap, and then release the rounding at the moment it is inserted into the cylindrical long groove, so that both ends of the main plate elastically expand to contact each other, and the main heating element is positioned along the inner periphery of the cylindrical long groove. The aim is to provide a sports ball warmer that can maximize thermal efficiency by conducting heat from the main heating element in close contact with the cylindrical main conductor.

The purpose of the present invention is to round and grip the subplate into a cylindrical shape so that both ends overlap, and then release the rounding at the moment it is inserted into the cylindrical short groove, so that both ends of the subplate are elastically expanded to contact each other, and the sub-heating element is positioned along the inner periphery of the cylindrical short groove. The aim is to provide a sports ball warmer that can maximize thermal efficiency by conducting heat from the sub-heating element in close contact with the cylindrical sub-conductor.

The purpose of the present invention is to further maximize the heating efficiency of sports balls by realizing not only air warming in the cylindrical long groove and cylindrical short groove through conduction of the heat of the main heating element and sub-heating element through conduction of the cylindrical main conductor and cylindrical short groove, but also direct heating by contact with the strip. The goal is to provide a sports ball warmer that can be used.

The purpose of the present invention is to apply a carbon fiber heating sheet to the main heating element and the sub-heating element, that is, a carbon fiber heating sheet made of CNT (Carbon Nano Tube) coated or deposited in an insulating film to generate far infrared rays and The aim is to provide a sports ball warmer that further maximizes the warming effect of sports balls using radiant heat.

The purpose of the present invention is to provide a sports ball warmer that can be easily attached and detached by engaging protrusions and engaging grooves when opening and closing the main body and the sub-lid.

The purpose of the present invention is to provide a sports ball warmer that can ensure insulation and cushioning by making the main body and sublid of EPP (Expanded Polypropylene) foam.

The present invention to achieve the above object,

It includes a main body with a cylindrical long groove, a sub-lid with a cylindrical short groove opening to face the cylindrical long groove, and a main heating element that is surrounded along the inner periphery of the cylindrical long groove and converts electrical energy into heat energy to warm the sports ball. In sports ball warmers,

The basic feature of the technical structure is that it includes a cylindrical main conductor having a bending ring bent inward in an arc shape to conduct heat while attaching the main heating element to the inner periphery of the cylindrical long groove and at the same time contact the sports ball. Do it as

The present invention has the effect of heating sports balls such as tennis balls, golf balls, baseball balls, etc. to maintain their elasticity in sports such as tennis, golf, and baseball that can be enjoyed even in winter, and even performing the function of a storage case.

The present invention allows a sports ball to be in contact with a bending ring bent inward in an arc shape on a cylindrical main conductor, so that the heat of the main heating element is not only heated through the air in the cylindrical long groove and cylindrical short groove through conduction of the cylindrical main conductor, but also bent. It has the effect of maximizing the warming efficiency of sports balls by realizing direct heating through contact with the belt by the ring.

In the present invention, a sports ball is embedded in a cylindrical main conductor while held in a bending ring, so that it does not shake or roll even if it is not filled with full, so it reduces noise when carried (especially when it is a hard golf ball, the noise is loud). It has the effect of preventing triggers.

In the present invention, the main plate is rounded and held in a cylindrical shape so that both ends overlap, and then the rounding is released at the moment it is inserted into the cylindrical long groove, so that both ends of the main plate elastically expand to contact each other, and the main heating element is moved toward the inner periphery of the cylindrical long groove. By allowing for close contact, there is an effect of maximizing thermal efficiency by conducting heat from the main heating element in close contact with the cylindrical main conductor.

The present invention includes an under-conducting cap that is inserted into the cylindrical main conductor and disposed on the bottom of the cylindrical long groove to surround the lower part of the sports ball and conduct heat, thereby providing a warming effect by allowing the sports ball to receive heat in all directions within the main body. It has the effect of allowing it to be further maximized.

The present invention has the effect of ensuring mutual assembly by placing the under-conducting cap on the bottom of the cylindrical long groove and covering the lower part of the bending ring provided at the bottom of the cylindrical main conductor.

In the present invention, the subplate is rounded and held in a cylindrical shape so that both ends overlap, and then the rounding is released at the moment when it is inserted into the cylindrical short groove, so that both ends of the subplate elastically expand to contact each other, and the sub-heating element is moved toward the inner periphery of the cylindrical short groove. By allowing for close contact, there is an effect of maximizing thermal efficiency by conducting the heat of the sub-heating element in close contact with the cylindrical sub-conductor.

The present invention not only warms the air in the cylindrical long groove and the cylindrical short groove through conduction of the heat of the main heating element and the sub-heating element through conduction of the cylindrical main conductor and the cylindrical short groove, but also realizes direct heating through strip contact, which can further maximize the warming efficiency of the sports ball. It works.

The present invention includes an upper conductive cap that is inserted into the cylindrical sub-conductor and disposed on the upper surface of the cylindrical short groove to surround the upper part of the sports ball and conduct heat, thereby providing a warming effect by allowing the sports ball to receive heat from all directions within the sub-cap. There is an effect that can be further maximized.

The present invention has the effect of preventing the sub-lid from being separated from each other and lost when attempting to open the sub-lid from the main body.

The present invention has the effect of simplifying the electrical connection structure.

The present invention applies a carbon fiber heating sheet to the main heating element and sub-heating element, that is, a carbon fiber heating sheet made of CNT (Carbon Nano Tube) coated or deposited in an insulating film to generate far-infrared rays and radiant heat by carbon (carbon). It has the effect of further maximizing the warming effect of sports balls.

The present invention has the effect of enabling the main body and the sub-lid to be easily attached and detached through the engaging protrusions and engaging grooves when opening and closing the main body and the sub-lid.

The present invention has the effect of ensuring insulation and cushioning by manufacturing the main body and sublid with EPP (Expanded Polypropylene) foam.

1 is a vertical cross-sectional view and a horizontal cross-sectional view showing a portable tennis ball storage box according to prior art document 1.
Figure 2a is an exploded perspective view showing a golf ball case according to prior art document 2.
Figure 2b is a cross-sectional view showing a golf ball case according to prior art document 2.
Figure 2c is a perspective view showing a golf ball case according to prior art document 2.
3A and 3B are images showing a sports ball warmer according to the present invention.
Figure 4 is a longitudinal cross-sectional view including the assembly process of the cylindrical main conductor and the cylindrical sub-conductor showing the sports ball warmer according to the present invention.
Figure 5 is an enlarged cross-sectional view of portion A of Figure 4.

Preferred embodiments of the sports ball warmer according to the present invention will be described with reference to the drawings. There may be a plurality of embodiments, and through these embodiments, the purpose, features and advantages of the present invention can be better understood. There will be.

The sports ball warmer according to the present invention warms sports balls (B) such as tennis balls, golf balls, baseballs, etc. to maintain their elasticity in sports that can be enjoyed even in winter, such as tennis, golf, and baseball. It is proposed that it can even perform the function of a storage case.

Figures 3a and 3b are images showing a sports ball warmer according to the present invention, and Figure 4 is a longitudinal cross-sectional view including the assembly process of the cylindrical main conductor (M30) and the cylindrical subconductor (S30) showing the sports ball warmer according to the present invention. , and FIG. 5 is an enlarged cross-sectional view of part A of FIG. 4.

As shown in FIGS. 3A to 5, the sports ball warmer according to the present invention has a main body (M10) with a cylindrical long groove (M11) pierced, and a sub with a cylindrical short groove (S11) pierced to face the cylindrical long groove (M11). It includes a lid (S10) and a main heating element (M20) that is surrounded along the inner periphery of the cylindrical long groove (M11) and converts electrical energy into heat energy to warm a sports ball (B) such as a tennis ball, golf ball, or baseball ball.

The main heating element (M20) can use the electric energy of a battery (not shown) built into the main body (M10), and can further receive electric energy through an external auxiliary battery or power supply (not shown). Energy is converted into heat energy in the main heating element (M20) to heat the sports ball (B). Since the sports ball (B) itself is made of a sphere, the relationship between the main heating element (M20) and the sports ball (B) is a point or linear shape. There is no choice but to be contacted.

In this case, when the sub-lid (S10) is closed on the main body (M10), the sports ball (B) can be heated only when heat energy is filled into the space within the cylindrical long groove (M11) and the cylindrical short groove (S11), thereby reducing thermal efficiency. It has to be extremely weak.

In the present invention, in order to actively solve this problem, the main heating element (M20) is closely adhered to the inner periphery of the cylindrical long groove (M11) to conduct heat, and at the same time, the main heating element (M20) is bent inward in an arc shape to contact the sports ball (B). A cylindrical main conductor (M30) with a ring (R) is proposed as the core configuration.

The sports ball (B) can come into contact with the bending ring (R) bent inward in an arc shape on the cylindrical main conductor (M30), so that the heat of the main heating element (M20) is transferred to the cylindrical main conductor (M30) through conduction. It is possible to maximize the warming efficiency of the sports ball (B) by realizing not only heating through the air in the long groove (M11) and the cylindrical short groove (S11), but also direct heating by contact with the band by the bending ring (R).

Furthermore, the sports ball (B) is embedded in the cylindrical main conductor (M30) while being held by the bending ring (R), so that it does not shake or roll even if it is not full, so it reduces noise when carried (especially hard balls). This is desirable because it can prevent the occurrence of noise (in the case of golf balls).

Preferably, the cylindrical main conductor (M30) is made of a main plate (M31) having the same width as the circumference of the cylindrical long groove (M11), is rounded into a cylindrical shape so that both ends of the main plate (M31) overlap, and then gripped into a cylindrical shape. The moment it is inserted into the long groove (M11), the rounding is released, so that both ends of the main plate (M31) elastically expand to come into contact with each other, allowing the main heating element (M20) to be brought into close contact with the inner periphery of the cylindrical long groove (M11). Heat from the main heating element (M20) is conducted in close contact with the cylindrical main conductor (M30) to maximize thermal efficiency.

At this time, the sports ball warmer according to the present invention includes an under-conducting cap (M40) that is inserted into the cylindrical main conductor (M30) and disposed on the bottom of the cylindrical long groove (M11) to surround the lower part of the sports ball (B) and conduct heat. Including, the heating effect can be further maximized by allowing the sports ball (B) to receive heat from all directions within the main body (M10).

At this time, the under-conducting cap (M40) is disposed on the bottom of the cylindrical long groove (M11) and hangs over the lower part of the bending ring (R) provided at the bottom of the cylindrical main conductor (M30) to ensure mutual assembly.

On the other hand, the sports ball warmer according to the present invention includes a sub-heating element (S20) that is mounted along the inner periphery of the cylindrical short groove (S11) and converts electrical energy into heat energy to warm the sports ball (B), and this sub-heating element (S20) It may include a cylindrical subconductor (S30) that conducts heat while being in close contact with the inner periphery of the cylindrical short groove (S11).

The sub-heating element (S20) can use the electric energy of an unshown battery built into the sub-lid (S10), and can further receive electric energy through an external auxiliary battery or power supply, and can use this electric energy as the main Not only does the heating element (M20) convert it into heat energy to heat the sports ball (B), but when the sub lid (S10) is opened from the main body (M10), the sports ball (B) to be used is exposed. It is desirable because it can be gripped.

At this time, the cylindrical subconductor (S30) is made of a subplate (S31) having the same width as the circumference of the cylindrical short groove (S11), and the subplate (S31) is rounded and gripped into a cylindrical shape so that both ends overlap, and then pressed into the cylindrical short groove (S11). The moment it is inserted into (S11), the rounding is released and the two ends of the sub plate (S31) expand elastically so that they come into contact with each other, allowing the sub heating element (S20) to be brought into close contact with the inner periphery of the cylindrical short groove (S11). Heat from the heating element (S20) is conducted in close contact with the cylindrical subconductor (S30) to maximize thermal efficiency.

Meanwhile, the cylindrical main conductor (M30) has a half-under bending ring (R1) at the top that is bent inward in a semicircular arc shape to contact the sports ball (B), and the cylindrical sub-conductor (S30) has a sports ball (S30) at the bottom. It is possible to have a half-upper bending ring (R2) that is bent inward in a semicircular arc shape so as to contact the ball (B), and the bending ring (R) is formed by these half-under bending rings (R1) and half-upper bending rings (R2). ) to complete.

A complete bent ring (R) can be completed by the half-under bending ring (R1) of the cylindrical main conductor (M30) and the half-upper bending ring (R2) of the cylindrical sub-conductor (S30), thereby forming a sub-bent ring (R) in the main body (M10). When the lid (S10) is closed, the half-under bending ring (R1) and the half-upper bending ring (R2) complete the complete bending ring (R) and allow the sports ball (B) to come into contact with the belt, thereby forming the main heating element (M20). ) and the sub-heating element (S20) not only warms the air in the cylindrical long groove (M11) and the cylindrical short groove (S11) through conduction of the cylindrical main conductor (M30) and the cylindrical sub-conductor (S30), but also directly warms the belt by contact. This is desirable because it can further maximize the heating efficiency of the sports ball (B).

Furthermore, the sports ball (B) is held in the half-under bending ring (R1) or half-upper bending ring (R2) and is embedded in the cylindrical main conductor (M30) or cylindrical sub-conductor (S30) from the main body (M10). This is desirable because it can prevent the sports ball (B) from easily coming out when the sub lid (S10) is opened.

At this time, of course, the sports ball (B) can be removed by shaking the main body (M10) or subbody.

Furthermore, the sports ball warmer according to the present invention includes an upper conductive cap (S40) that is inserted into the cylindrical subconductor (S30) and disposed on the upper surface of the cylindrical short groove (S11) to surround the upper part of the sports ball (B) and conduct heat. Including, the warming effect can be further maximized by allowing the sports ball (B) to receive heat from all directions within the sublid (S10).

In addition, the upper conductive cap (S40) is disposed on the upper surface of the cylindrical short groove (S11) and hangs over the upper half of the half upper bending ring (R1) provided on the cylindrical subconductor (S30) to ensure mutual assembly.

On the other hand, the sports ball warmer according to the present invention includes a main band (D1) wound around the main body (M10), a subband (D2) wound around the sublid (S10), the main band (D1), and the subband. Including a connection band (D3) connecting (D2), to prevent the phenomenon of separation and loss when opening the sub lid (S10) from the main body (M10).

At this time, the main heating element (M20) and the sub-heating element (S20) are electrically connected by the connection cable (C) built into the connection band (D3), and the main heating element (M20) is connected to the connector (M10) through the main body (M10). By allowing external power to be supplied through N), the electrical connection structure can also be simplified.

In addition, the main heating element (M20) and the sub-heating element (S20) apply a carbon fiber heating sheet, that is, a carbon fiber heating sheet made of CNT (Carbon Nano Tube) coated or deposited in an insulating film to heat the carbon. Far-infrared rays and radiant heat are used to further maximize the warming effect of the sports ball (B).

Furthermore, the main body (M10) has a coupling protrusion (M12) protruding at the top, and the sub-lid (S10) has a coupling groove (S12) drilled at the bottom to receive the coupling protrusion (M12), When the (M10) and the sub-lid (S10) are opened and closed, they can be easily attached and detached by the engaging protrusion (M12) and the engaging groove (S12).

And, according to the present invention, the main body (M10) and the sub lid (S10) are made of EPP (Expanded Polypropylene) foam, which can ensure insulation and cushioning.

The present invention can be used in the field of sports that can be enjoyed outdoors in winter, such as tennis, golf, baseball, etc.

B: Sports ball M10: Main body
M11: Cylindrical long groove M12: Combined protrusion
M20: Main heating element M30: Main conductor
M31: Main plate M40: Under conduction cap
S10: Sublid S11: Cylindrical short groove
S12: Coupling groove S20: Sub-heating element
S30: Subconductor S31: Subplate
S40: Upper conduction cap R: Bending ring
R1: Half-under bending ring R2: Half-upper bending ring
D1: Main band D2: Sub band
D3: Connection band C: Connection cable
N: Connector

Claims (14)

A main body (M10) in which a cylindrical long groove (M11) is pierced, a sublid (S10) in which a cylindrical short groove (S11) is pierced to face the cylindrical long groove (M11), and along the inner periphery of the cylindrical long groove (M11). In the sports ball warmer including a main heating element (M20) that is surrounded and converts electrical energy into heat energy to warm the sports ball (B),
A cylindrical shape having a bending ring (R) bent inward in an arc shape to conduct heat while attaching the main heating element (M20) to the inner periphery of the cylindrical long groove (M11) and at the same time contact the sports ball (B). A sports ball warmer characterized by including a main conductor (M30). According to paragraph 1,
The cylindrical main conductor (M30) consists of a main plate (M31) having a width equal to the circumference of the cylindrical long groove (M11),
After the main plate (M31) is rounded and held in a cylindrical shape so that both ends overlap, the rounding is released at the moment when it is inserted into the cylindrical long groove (M11), and the both ends of the main plate (M31) elastically expand to come into contact with each other. A sports ball warmer characterized in that the main heating element (M20) is brought into close contact with the inner periphery of the cylindrical long groove (M11). According to paragraph 2,
Sports, characterized in that it includes an under-conducting cap (M40) inserted into the cylindrical main conductor (M30) and disposed on the bottom of the cylindrical long groove (M11) to conduct heat while surrounding the lower part of the sports ball (B). Ball warmer. According to paragraph 3,
The under-conducting cap (M40) is disposed on the bottom of the cylindrical long groove (M11) and hangs over the lower part of the bending ring (R) provided at the bottom of the cylindrical main conductor (M30). According to paragraph 4,
A sub-heating element (S20) installed along the inner periphery of the cylindrical short groove (S11) to warm the sports ball (B) by converting electrical energy into heat energy,
A sports ball warmer comprising a cylindrical subconductor (S30) that conducts heat while tightly contacting the subheating element (S20) toward the inner periphery of the cylindrical short groove (S11). According to clause 5,
The cylindrical subconductor (S30) is made of a subplate (S31) having the same width as the circumference of the cylindrical short groove (S11),
The subplate (S31) is rounded and held in a cylindrical shape so that both ends overlap, and then the rounding is released at the moment when it is inserted into the cylindrical short groove (S11), so that both ends of the subplate (S31) elastically expand to come into contact with each other. A sports ball warmer characterized in that the sub-heating element (S20) is brought into close contact with the inner periphery of the cylindrical short groove (S11). According to clause 6,
The cylindrical main conductor (M30) has a half-under bending ring (R1) at the top that is bent inward in a semicircular arc shape so as to contact the sports ball (B),
The cylindrical subconductor (S30) has a half upper bending ring (R2) at its lower end that is bent inward in a semicircular arc shape to contact the sports ball (B),
A sports ball warmer, characterized in that the bending ring (R) is completed by the half-under bending ring (R1) and the half-upper bending ring (R2). In clause 7,
Sports, characterized in that it includes an upper conductive cap (S40) inserted into the cylindrical subconductor (S30) and disposed on the upper surface of the cylindrical short groove (S11) to conduct heat while surrounding the upper part of the sports ball (B). Ball warmer. According to clause 8,
The upper conductive cap (S40) is disposed on the upper surface of the cylindrical short groove (S11) and hangs over the upper part of the half upper bending ring (R2) provided on the cylindrical subconductor (S30). According to any one of claims 5 to 9,
A main band (D1) wound around the main body (M10),
A subband (D2) wrapped around the sublid (S10),
A sports ball warmer comprising a connection band (D3) connecting the main band (D1) and the sub-band (D2). According to clause 10,
The main heating element (M20) and the sub-heating element (S20) are electrically connected by a connection cable (C) built into the connection band (D3),
A sports ball warmer, characterized in that the main heating element (M20) receives external power through a connector (N) penetrating the main body (M10). According to clause 11,
A sports ball warmer, wherein the main heating element (M20) and the sub heating element (S20) are carbon fiber heating sheets. According to any one of claims 1 to 9,
The main body (M10) has a coupling protrusion (M12) protruding at the top,
A sports ball warmer, characterized in that the sub-lid (S10) has a coupling groove (S12) drilled at the bottom to receive the coupling protrusion (M12). According to any one of claims 1 to 9,
A sports ball warmer, wherein the main body (M10) and the sublid (S10) are made of EPP foam.

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