KR102611623B1 - Knee extension power strengthening device - Google Patents

Abstract

The present invention includes a protective band surrounding the knee; A hard shell detachably coupled to the front side of the protection band and surrounding a portion of the knee; And a strap made of elastic material that passes through the strap through hole formed on the front side of the hard shell, one end of which is fixed to the upper side of the protection band, and the other end of which is fixed to the lower side of the protection band. .

Description

KNEE EXTENSION POWER STRENGTHENING DEVICE}

The present invention relates to a device for strengthening knee extension force to assist using elasticity in the process of bending and straightening the knee.

More specifically, in order to increase the torque generated from the joints of the body, the r value is increased between the center point of a joint such as the knee and the hard shell, and the elasticity of the strap is used to increase the F value to create a greater torque. This relates to a device for strengthening knee extension power that allows movement to be performed with less force due to increased rotational force during bending and opening of the joint.

Knees support the human body and are used in various movements such as sitting, walking, or lifting objects through bending and turning movements.

However, people who are exposed to environments that require excessive use of their knees, such as workers or athletes who use their knees a lot, or people who have physically weak knees, such as children or the elderly, have a very important function in protecting their bodies. However, there is a problem in that pain is caused by various causes, such as damage due to excessive friction.

Accordingly, in order to solve the above problems, various technologies have been developed to assist the user when bending and straightening the knee while wearing an elastic knee protector.

However, conventional knee assist devices only perform the function of assisting in the process of bending and straightening the knee using only elasticity, and increase the rotational force according to the operation mechanism of the knee, resulting in maximizing the knee joint extension force. There is a problem that it is difficult to do, and therefore, different extension forces cannot be obtained for each user, and furthermore, there is a problem that the muscle strength assistance effect is insufficient.

Registered Patent Publication No. 10-2028675 (2019.09.27.) Public Patent Publication No. 10-2021-0020547 (2021.02.24.) Registered Utility Model Publication No. 20-0332860 (October 31, 2003)

The present invention was created to solve the above problems, and the problem to be solved by the present invention is to increase the r value between the center point of a joint such as the knee and the hard shell in order to increase the torque generated from the joints of the body. In addition, by using the elasticity of the strap to increase the F value to generate greater rotational force, a device to strengthen knee extension power is provided to assist in taking movements with less force due to the increase in rotational force when bending and opening the joint. There is something to do.

In addition, another problem to be solved by the present invention is that as a pad is selectively provided between the knee and the hard shell, considering that each user has different physical characteristics, the r between the center of the knee and the hard shell is adjusted to suit the different physical characteristics. The goal is to provide a knee extension force strengthening device that can provide customized values to the user.

In addition, another problem to be solved by the present invention is to provide a knee extension force strengthening device that can provide a customized muscle strength assistance effect by selectively setting the F value by adjusting the elasticity of the strap connected to the hard shell. there is.

In order to solve the above problems, the knee extension force strengthening device according to the present invention includes a protection band surrounding the knee; A hard shell that is detachably attached to the front side of the protection band and covers a portion of the knee; And a strap made of elastic material that passes through the strap through hole formed on the front side of the hard shell, one end of which is fixed to the upper side of the protection band, and the other end of which is fixed to the lower side of the protection band. By providing a strengthening mechanism, we aim to solve technical challenges.

The present invention increases the r value between the center point of a joint such as the knee and the hard shell in order to increase the torque generated from the joints of the body, and increases the F value using the elasticity of the strap to produce a greater torque. By doing so, there is an effect of assisting in taking the movement with less force due to the increase in rotational force when bending and opening the joint.

In addition, the present invention provides a user-customized r value between the center of the knee and the hard shell in consideration of the fact that each user has different physical characteristics as a pad is optionally provided between the knee and the hard shell. It has remarkable effects.

In addition, the present invention has the remarkable effect of providing a customized muscle strength assistance effect to the user by selectively setting the F value by adjusting the elasticity of the strap connected to the hard shell.

Figure 1 is an example showing the state of use of the knee extension force strengthening device according to the present invention.
Figure 2 is a front perspective view showing the protection band in the knee extension force strengthening device according to the present invention.
Figure 3 is a front view showing the hard shell in the knee extension force strengthening device according to the present invention.
Figure 4 is a side view showing the hard shell in the knee extension force strengthening device according to the present invention.
Figure 5 is a bottom view showing the hard shell in the knee extension force strengthening device according to the present invention.
Figure 6 is a side view showing an example of improvement in extension force in the knee extension force strengthening device according to the present invention.
Figure 7 is a side cross-sectional view showing an example of a pocket being formed in a hard shell in the knee extension force strengthening device according to the present invention.
Figure 8 is a front view showing an example of a waist protection band provided in the knee extension force strengthening device according to the present invention.

Advantages and features of the embodiments of the present invention and methods for achieving them will become clear by referring to the embodiments described in detail below along with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below and may be implemented in various different forms. The present embodiments are merely provided to ensure that the disclosure of the present invention is complete, and that it is common knowledge in the technical field to which the present invention pertains. It is provided to fully inform those who have the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numerals refer to like elements throughout the specification.

In describing embodiments of the present invention, if a detailed description of a known function or configuration is judged to unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the terms and words used in the specification and claims are terms defined in consideration of the functions in the embodiments of the present invention, and should not be construed as limited to the usual or dictionary meaning, and the inventor does not disguise his or her invention. In order to explain it in the best way, it must be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that the concept of the term can be appropriately defined.

Therefore, the embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention and do not represent the entire technical idea of the present invention, so various equivalents can be substituted for them at the time of filing the present application. It should be understood that there may be variations.

Hereinafter, before explaining with reference to the drawings, matters that are not necessary to reveal the gist of the present invention, that is, known configurations that can be easily added by a person skilled in the art will not be shown or described in detail. Let me make it clear that I did not.

First, before describing various embodiments of the present invention in detail with reference to the accompanying drawings, the directions (e.g., “front”, “back”, “left”) of the components described in the following detailed description or shown in the drawings , “right”, “top”, “bottom”, “superior”, “bottom”, “lateral”, “longitudinal”, “frontal”, “dorsal”, “one side”, “other side”, “medial” and “ Regarding terms such as "outside"), it does not simply indicate or mean that it must have a specific direction, and the description of this direction is intended to facilitate explanation of the components with reference to the attached drawings.

The knee extension force strengthening device according to the present invention relates to a knee extension force strengthening device for assisting by using elasticity in the process of bending and straightening the knee.

More specifically, in order to increase the torque generated from the joints of the body, the r value is increased between the center point of a joint such as the knee and the hard shell 200, and the F value is increased using the elasticity of the strap 300. This relates to a device for strengthening knee extension power that allows movement to be performed with less force due to increased rotational force when bending and opening the joint by increasing the torque to produce greater rotational force.

Hereinafter, the knee extension force strengthening device according to the present invention will be described in detail with reference to the attached drawings.

Meanwhile, before explaining the knee extension force strengthening mechanism in this specification with reference to the accompanying drawings, it should be noted that the part where the user's knee is formed and the hard shell 200 is located is indicated as the front side.

Figure 1 is an embodiment showing the state of use of the knee extension force strengthening device according to the present invention, and Figure 2 is a front perspective view showing the protection band in the knee extension force strengthening device according to the present invention.

The knee extension force strengthening device according to the present invention includes a protection band 100 worn to surround the user's knee, and a hard shell 200 provided to cover the front side of the protection band 100, that is, a portion of the front side of the user's knee. And strengthening the knee extension force to assist in making the movement with less force due to the increase in rotational force in the process of bending and straightening the knee due to the elasticity of the strap 300 made of elastic material that penetrates the hard shell 200 from the top and bottom. It's about the mechanism.

The protection band 100 is worn to surround the user's knees, and a hard shell 200, which will be described later, is attached and detachably attached to the front side, and includes a first fixing clip 110, a second fixing clip 120, and a hard shell go. It is comprised of the government (130).

As shown in the attached drawing, the protection band 100 is formed in a cylindrical shape to surround the knee, and is preferably made of an elastic fabric material, and thus can be made to have tensile and elastic properties.

That is, the protection band 100 is worn to surround the user's knee, so that it elastically adheres to the knee and exerts pressure.

At this time, the protection band 100 may be partially or entirely made of a mesh material, and ensures smooth ventilation of all parts that come into contact with the user's body.

The first fixing clip 110 and the second fixing clip 120 are formed on the upper and lower sides of the protection band 100, respectively, and perform the function of fixing the strap 300, which will be described later.

When explaining this with reference to FIG. 2, the first fixing clip 110 may be formed on the front upper side of the protection band 100, and the second fixing clip 120 may be formed on the front lower side of the protection band 100. there is.

Accordingly, after the strap 300 penetrates the hard shell 200 coupled to the front side of the protection band 100, both ends are respectively fixed to the first fixing clip 110 and the second fixing clip 120, The strap 300 can easily maintain the shape of the hard shell 200 penetrating from the front to the top and bottom.

To elaborate, both ends of the strap 300 are respectively fixed to the first fixing clip 110 and the second fixing clip 120 provided on the front side of the protection band 100, so that the strap 300 is always used by the user. It is located on the front side of the knee, and by minimizing flow to the back or side, the effect of improving extension power due to knee use can be maintained.

At this time, the gap between the first fixing clip 110 and the second fixing clip 120 is preferably formed to be longer than the upper and lower lengths of the hard shell 200, which will be described later, and thus, the space penetrating the hard shell 200 Both ends of the strap 300 are exposed to the outside of the hard shell 200 so that they can be smoothly fixed to each of the first fixing clip 110 and the second fixing clip 120.

When described with reference to FIG. 2, the hard shell fixing part 130 is used to fix the hard shell 200, which will be described later, to the front side of the protection band 100. It is provided on the outside of the protection band 100, and the hard shell 200 ) is fastened to the first fixing hole 212 and the second fixing hole 221 formed in the.

That is, the hard shell fixing parts 130 are formed on the upper and lower sides of the protection band 100 and form a pair, and each hard shell fixing part 130 is preferably made of a flexible fabric material, and the hard shell (described later) It is fastened through the first fixing hole 212 and the second fixing hole 221 of 200).

At this time, the protection band 100 and the hard shell 200 are fastened by the hard shell fixing part 130 through the first fixing hole 212 and the second fixing hole 221 of the hard shell 200. A portion of the hard shell fixing part 130 may be configured to be fastened by being made of one selected from Velcro, magnet, or snap.

For example, when Velcro is attached to the hard shell fixing part 130, one hard shell fixing part 130 connected to one side from the upper side of the protection band 100 penetrates the first fixing hole 212 of the hard shell 200. After doing so, it is attached to the Velcro formed on the other side from the upper side of the protection band 100, and another hard shell fixing part 130 connected to one side from the lower side of the protection band 100 is connected to the second fixing hole of the hard shell 200 ( 221) and then attaching it to the Velcro formed on the other side from the lower side of the protection band 100, so that the protection band 100 and the hard shell 200 are firmly fastened.

Since this hard shell fixing part 130 is made of a flexible fabric material, it is in close contact with the inner surface of the hard shell 200 and is held between the protection band 100 and the hard shell 200 even when the user wears a knee extension force strengthening device. By being positioned, it is possible to prevent the hard shell fixing part 130 from coming into direct contact with the user's skin, thus minimizing the uncomfortable foreign body sensation that the user may feel.

Figure 3 is a front view showing the hard shell in the knee extension force strengthening device according to the present invention, Figure 4 is a side view showing the hard shell in the knee extension force strengthening device according to the present invention, and Figure 5 is a knee extension force strengthening device according to the present invention. is a bottom view showing the hard shell, and Figure 6 is a side view showing an example of improved extension force in the knee extension force strengthening device according to the present invention.

The hard shell 200 is detachably coupled to the front side of the protection band 100 and is provided to cover a portion of the knee, and allows the strap 300, which will be described later, to penetrate from the front side to improve extension force, thereby preventing the knee from bending. It is designed to perform a muscle assistance function in the process, and is composed of an upper part (210), a lower part (220), a strap through hole (230), and a groove part (240).

This hard shell 200 is durable and may be made of TPE (Thermo Plastic Elastomer) material to protect against external shocks or scratches and at the same time flexibly cope with knee movements.

Here, the TPE material refers to a polymer obtained by polymerizing two types of monomers, and the monomers include a hard segment, which is a monomer with rigid properties, and a soft segment, which is a flexible monomer.

Examples of the hard segment include polyethylene, polypropylene, polystyrene, polyvinyl chloride, and polyester, and examples of the soft segment include polyurethane, polyamide, ethylene-propylene-rubber, ethylene-propylene-diene-monomer, and polybutadiene. , polyisoprene, amorphous-polyester, etc.

Meanwhile, the hard shell 200 is preferably made of an integrated structure in which the upper part 210 and the lower part 220, which will be described later, are connected, and in this specification, the upper part 210 and the lower part 220 are separately specified. Please note that this is to clearly and concisely explain the technical features.

Hereinafter, the upper part 210 and the lower part 220 will be described in detail with reference to FIGS. 2 and 3. The upper part 210 is provided to surround the upper part of the knee, and includes the protrusion 211 and the first fixing hole. It is configured to include (212), and the lower part (220) is extended to the lower side of the upper part (210) and is provided to surround the lower part of the knee, and includes a second fixing hole (221).

As shown in FIG. 3, the upper part 210 protrudes outward from the top to the bottom, and the lower part 220 protrudes outward from the bottom to the top of the hard shell 200. The middle portion may be protruding toward the front.

Accordingly, the portion where the upper end 210 and the lower end 220 are connected is formed with a protrusion 211 that protrudes toward the front side of the hard shell 200, and the protrusion 211 is formed so that the strap 300, which will be described later, is connected to the hard shell 200. When located on the front side, it is supported on the protrusion 211, thereby maximizing the distance r between the center point of the knee and the protrusion 211, that is, the strap 300 supported on the protrusion 211. By doing so, a greater torque can be obtained.

In addition, the upper part 210 is formed with one or more first fixing holes 212 into which the hard shell fixing part 130 provided on the upper side of the protection band 100 is fastened, and the lower part 220 is formed with the protection band 100. One or more second fixing holes 221 to which the hard shell fixing part 130 provided on the lower side is fastened may be formed.

These first fixing holes 212 and second fixing holes 221 penetrate the hard shell fixing parts 130 provided on the upper and lower sides of the protection band 100, respectively, so that the hard shell 200 is attached to the protection band 100. It performs the function of ensuring a strong connection.

At this time, the first fixing hole 212 and the second fixing hole 221 may each be provided in plural numbers, and may be provided to be spaced apart from each other from the back side to the front side.

Accordingly, by allowing the hard shell fixing part 130 to be coupled to each of the plurality of first fixing holes 212 or second fixing holes 221, the protection band 100 and the hard shell 200 are designed in consideration of the user's body size. It allows it to be worn closer to the user's knees.

Depending on the design conditions, grooves 240 that are inwardly dug may be formed at both ends between the upper end 210 and the lower end 220.

By allowing the hard shell 200 to have a certain amount of flexibility through the space formed by the groove 240, the hard shell 200 adheres more closely to the user's knee during the process of bending and straightening the knee, making it stable even with a small amount of force. It can assist you in taking action.

The strap through hole 230 is formed on the front side of the lower part 220 to penetrate the upper and lower sides, and allows the strap 300, which will be described later, to pass through.

As shown in the attached drawing, the strap penetration hole 230 may be narrow on the front and back sides and wide on the left and right sides so that the wide plate-shaped strap 300 can pass through it. .

At this time, the strap through hole 230 is formed on the lower side of the protrusion 211 formed between the upper end 210 and the lower end 220, and the upper opening hole of the strap through hole 230 is on the lower side of the protrusion 211. It can be formed to be formed.

Accordingly, the strap 300 that has penetrated the strap through hole 230 is fixed to the first fixing clip 110 provided on the upper side of the protection band 100 while being supported on the protrusion 211, so that it is connected to the center point of the knee and By maximizing the distance r between the protrusions 211, that is, between the center point of the knee and the strap 300, a large rotational force can be obtained.

The strap 300 penetrates the strap through hole 230 formed on the front side of the hard shell 200, and one end is fixed to the upper side of the protection band 100, and the other end is fixed to the lower side of the protection band 100. .

This strap 300 is preferably made of an elastic material that can be stretched and stretched, and the upper side is fixed to the first fixing clip 110 through the strap through hole 230, and the lower side is fixed to the second fixing clip 120. is fixed to

At this time, both ends of the strap 300 can be fixed to the first fixing clip 110 and the second fixing clip 120, respectively, by means of Velcro attachment parts 310 provided at both ends.

The Velcro attachment portions 310 are provided at both ends of the strap 300 to be respectively fixed to the first fixing clip 110 and the second fixing clip 120, and include a female attachment means 311 and a male attachment means. It is composed including (312).

In detail, the Velcro attachment part 310 is provided with a female attachment means 311 on the outer peripheral surface of the end of the strap 300, and has a male attachment means 312 on a portion of the outer peripheral surface spaced apart from the female attachment means 311. It can be provided.

For example, the female attachment means 311 provided at the upper end of the strap 300 penetrates the first fixing clip 110 and then surrounds the first fixing clip 110, and the male attachment means formed on the outer peripheral surface. By being attached to (312), the upper end of the strap 300 is fixed to the first fixing clip 110, and the arm attachment means 311 provided at the lower end of the strap 300 is fixed to the second fixing clip. After penetrating through (120), it wraps around the second fixing clip 120 and is attached to the male attachment means 312 formed on the outer peripheral surface, so that the lower end of the strap 300 is fixed to the second fixing clip 120. do.

Accordingly, the strap 300 made of elastic material that has penetrated the strap through hole 230 is supported on the protrusion 211 and both ends are fixed to the first fixing clip 110 and the second fixing clip 120, respectively. , it has elasticity.

Explaining this with reference to FIG. 6, in order to obtain a large rotational force, the distance (r) between the center point of the knee and the protrusion 211, that is, between the center point of the knee and the strap 300, is increased or the distance between the strap 300 is increased. Since the force (F) to pull upward starting from the protrusion 211 due to elasticity must be increased, the strap 300 is supported on the protrusion 211 protruding toward the front side formed on the hard shell 200, thereby allowing a larger knee. It is possible to secure the distance (r) between the center point and the strap 300, and further, by pulling the upper end of the strap 300 upward and fixing it to the first fixing clip 110, the elasticity of the strap 300 is increased. As a result, the force (F) to pull the protrusion 211 upward can be increased, allowing greater rotational force to be obtained, and thus, the extension force for muscle assistance can be greatly improved.

In other words, it can assist the user in taking movements with less force due to the increase in rotational force in the process of bending and straightening the knee.

Figure 7 is a side cross-sectional view showing an example of a pocket being formed in a hard shell in the knee extension force strengthening device according to the present invention.

Depending on design conditions, the hard shell 200 may be configured to have a pocket 250 formed on the inside, and a pad 251 to be inserted into the pocket 250.

The pocket 250 is attached to the rear side of the hard shell 200 along the outline to form a partition space between the hard shell 200 and the pocket 250, and the pad 251 is inserted into the partition space.

At this time, the pocket 250 is formed on the rear side of the hard shell 200, and may preferably be formed on the rear side of the upper end 210.

These pockets 250 are made of a breathable material such as mesh to facilitate ventilation, thereby facilitating sweat discharge and improving drying performance.

Furthermore, the pocket 250 is formed in a shape corresponding to a portion of the back of the hard shell 200 so as to be in close contact with the back of the upper end 210 of the hard shell 200, and one portion selected from the upper, lower, left, or right side is open. It can be done in any form.

That is, by allowing the pad 251 to be inserted through the open portion, the pad 251 can be easily attached and detached between the hard shell 200 and the pocket 250. Depending on the design conditions, it may be made of one of Velcro, magnets, snaps, or zippers so that the open portion can be selectively opened.

The pad 251 is configured to be detachable from the pocket 250 formed on the rear side of the hard shell 200, and is inserted into the pocket 250 and positioned between the protection band 100 and the hard shell 200.

At this time, the pad 251 may be made of a material that has elasticity and a certain strength, such as synthetic resin or plastic, or may be made of a flexible material such as rubber, fabric, or sponge.

With this configuration, when the pad 251 is inserted into the pocket 250, the pad 251 is positioned between the upper end 210 of the hard shell 200 and the protection band 100, as shown in Figure 6. Referring to this, as the thickness of the pad 251 increases or the number of pads 251 fitted into the pocket 250 increases, the distance (r) between the protrusion 211 of the upper end 210 and the center point of the knee increases. ) is increased, so a greater rotational force can be secured and the extension force for muscle strength can be greatly improved.

Figure 8 is a front view showing an example of a waist protection band provided in the knee extension force strengthening device according to the present invention.

Depending on the design conditions, as described with reference to FIG. 8, a waist protection band 400 located at the user's waist and surrounding the user's waist may be further provided.

This waist protection band 400 is located at the user's waist, may be made of a mesh material for good ventilation, and may be provided with a pair of auxiliary straps 410 extending downward on the back side.

Here, the auxiliary strap 410 connects the waist protection band 400 and the protection band 100 worn on the user's knees, and may be made of an elastic material with tensile and elastic properties.

Preferably, it may be made of the same material as the strap 300.

Accordingly, when wearing the waist protection band 400, a pair of auxiliary straps 410 extending downward on the back side of the waist protection band 400 are connected to each of the protection bands 100 worn on both knees of the user, The movement of the protection band 100 worn on the user's knee is minimized so that it can be stably positioned on the user's knee.

Furthermore, even if a force pulling the upper part of the protection band 100 downward is generated due to the elasticity of the strap 300 in the process of the user bending the knee, the protection band is connected by the waist protection band 400 and the auxiliary strap 410. By preventing (100) from moving below the user's knee and supporting it firmly and stably, movement of the protection band (100) can be minimized even if the knee is repeatedly bent and straightened.

According to this configuration, the knee extension force strengthening device according to the present invention increases the r value between the center point of a joint such as the knee and the hard shell 200 in order to increase the torque generated in the joint of the body, and a strap ( By using the elasticity of 300) to increase the F value to generate greater rotational force, there is an effect of assisting in taking the action with less force due to the increase in rotational force when bending and opening the joint.

In addition, as the pad 251 is optionally provided between the knee and the hard shell 200, taking into account that each user has different physical characteristics, the r between the center of the knee and the hard shell 200 is adjusted to suit the different physical characteristics. Values can be customized to the user.

In addition, by selectively setting the F value by adjusting the elasticity of the strap 300 connected to the hard shell 200, a muscle strength assistance effect can be provided customized to the user.

In the above description, various embodiments of the present invention have been presented and explained, but the present invention is not necessarily limited thereto, and those skilled in the art will understand various embodiments without departing from the technical spirit of the present invention. It can be seen that branch substitution, transformation, and change are possible.

100: protection band 110: first fixing clip
120: Second fixing clip 130: Hard shell fixing part
200: hard shell 210: upper part
211: protrusion 212: first fixing hole
220: lower part 221: second fixing hole
230: Strap through hole 240: Groove
250: Pocket 251: Pad
300: Strap 310: Velcro attachment part
311: female attachment means 312: male attachment means
400: Waist protection band 410: Auxiliary strap

Claims (10)

A protective band surrounding the knee (100);
A hard shell 200 that is detachably coupled to the front side of the protection band 100 and surrounds a portion of the knee; and
A strap made of elastic material passes through the strap through hole 230 formed on the front side of the hard shell 200, with one end fixed to the upper side of the protection band 100 and the other end fixed to the lower side of the protection band 100. Consisting of (300);
The protection band 100 is
A first fixing clip 110 to which one end of the strap 300 is fixed to the upper front side; and
It is configured to include a second fixing clip 120 to which the other end of the strap 300 is fixed to the lower front side,
The strap 300 is
It is comprised of a Velcro attachment portion 310 provided at each end,
The Velcro attachment portion 310 is
Arm attachment means 311 formed on the outer peripheral surface of the end of the strap 300; and
It includes a male attachment means 312 formed on a portion of the outer peripheral surface of the strap 300 and spaced apart from the female attachment means 311,
The pair of female attachment means 311 is characterized in that it can be attached to or detached from the male attachment means 312 after penetrating each of the first fixing clip 110 and the second fixing clip 120,
The hard shell 200 is
An upper portion 210 provided to surround the upper portion of the knee;
a lower part 220 that extends below the upper part 210 and is provided to surround the lower part of the knee; and
It is configured to include a strap penetration hole 230 formed on the front side of the lower part 220 to penetrate the upper and lower sides through which the strap 300 passes,
The upper part 210 is
It protrudes outward from the top to the bottom,
The lower part 220 is
It is characterized in that it protrudes outward from the bottom to the top and includes a strap through hole 230 through which the wrap 300 penetrates,
Between the upper end 210 and the lower end 220, a groove 240 is formed in the form of an inward groove at each of both ends,
A protrusion 211 protruding outward is formed between the upper end 210 and the strap through hole 230,
The protrusion 211 is
Characterized in that the strap 300 passing through the strap through hole 230 is supported,
The protection band 100 is
It is configured to include a hard shell fixing part 130 for fixing the hard shell 200 to the upper and lower sides, respectively,
The upper part 210 is
At least one first fixing hole 212 is formed to which the hard shell fixing part 130 provided on the upper side of the protection band 100 is fastened,
The lower part 220 is
Characterized in that one or more second fixing holes 221 are formed to which the hard shell fixing part 130 provided on the lower side of the protection band 100 is fastened,
The hard shell 200 is
A pocket 250 formed on the inside; and
A device for strengthening knee extensibility, characterized in that it includes a pad (251) fitted into the pocket (250).
delete delete delete delete delete delete delete delete In claim 1,
Consisting of a waist protection band (400) surrounding the waist,
The waist protection band 400 is
A knee extension force strengthening device comprising: an auxiliary strap (410) made of elastic material, which is provided as a pair on the back side, extends downward and is connected to each of the protection bands (100).

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