JP2018178323A - Socks - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pair of socks for assisting a wearer in bringing the toes into contact with the ground well, thereby walking in a good posture.SOLUTION: A sock 1 has a convex stimulating part 31 for four fingers of the thumb, the index, the middle and the ring fingers, and a convex stimulation part 33 for a little finger, which stimulate the sole of the foot by protruding toward the foot side, at a position between a joint line 6 through the reverse sides of the roots of the respective toes and a digital pad center 7, or at the position of the joint line 6. The convex stimulating part 31 for four fingers and the convex stimulating part 33 for a little finger are arranged to stimulate all parts between the joint line 6 and the digital pad center 7 of the thumb, the index, the middle, the ring and the little fingers.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a sock worn by a person on a foot.

Conventionally, various functional socks have been proposed.
For example, a sock for use during sports activities has been proposed (see Patent Document 1). The sock is provided with a cushion in the step area, which is supposed to support the fat cushion of the foot originally provided.

There is also proposed a sock in which a thick-walled portion is provided on the insole portion in the vicinity of the root of the toe (see Patent Document 2). It is said that this sock can be installed at the base of the toe through the thick part and can be well stretched by the toe.
However, more effective socks have been desired.

Japanese Patent Publication No. 2007-506869 JP, 2015-212439, A

  SUMMARY OF THE INVENTION In view of the above-described problems, the present invention provides a sock that assists the user in walking with a good posture while making good contact with the toes, and it is an object of the present invention to improve user satisfaction.

  According to the present invention, a convex stimulation portion which is convex toward the foot side and stimulates the sole at a position between the joint line on the back side of each toe of each person to the center position of the finger ball or the position of the indirect line. It is characterized by being a provided sock.

  According to the present invention, it is possible to provide a sock that assists in walking on the toes well with good posture.

Right side view of the sock. The partial sectional view which looked at the socks from the plane side. Bottom view of the sock from the bottom side. Right side cross-sectional view of the sock.

  The inventor of the present invention has conducted intensive studies in order to improve the symptoms of floating fingers often found in modern people. This floating finger means that the finger is floating when the foot is in contact with the foot, and should originally support the weight with three points, the toe, the finger ball, and the heel in the standing state. Pointing to a state of support. This floating finger causes various problems, such as causing a deterioration in posture.

  In order to prevent the floating finger, the inventor considered that the finger naturally comes in contact with the ground by stimulating the inside and the vicinity of the finger. We also discovered that it is desirable to keep the toes spread in order to properly ground the toes. Then, in order to improve the floating finger with socks, provide a protruding part that stimulates the sole or sole of the toes, or squeeze the circumference of the foot with an elastic material so that the foot draws an arch. I thought about pressing etc. In this specification, the term "elasticity" refers to the degree of strength required for expansion and contraction, and if the elasticity is strong, a strong force is necessary to extend, and the force to contract is strong. Point to

  Here, if a cushioning property is given to the portion where the foot comes in contact as in the above-mentioned document 1, as a characteristic of a person, it walks so that the cushioned portion is grounded, in other words, the cushioned portion is strongly on the ground Landing will occur as you strike. However, such walking is undesirable.

  Also, if a thick portion is provided at the base of the toe as in the above-described document 2, the shape may be such that the base of the toe may come into contact with the ground via the thick portion, but He did not come to stand firmly on the ground. That is, it is only formally that the toes are in contact with the ground through the flesh pressure part, and the toes do not function to hold the ground firmly.

  If you understand these things in the process of earnestly researching and give stimulation to the sole at a position where it does not reach the meat ball on the meat ball side from the joint line of the toe base, the toe will be natural by human condition reflection. They have developed a sock that can impart such a stimulus with the understanding that it spreads.

  In addition, in order to spread the toes, it is effective to draw an arch by tightening the circumference of the foot, and thus there is an unnecessary heel by not giving cushioning while tightening the circumference of the foot in this way I also invented to suppress walking.

  Hereinafter, an embodiment of the present invention in which all of these elements are added will be described with reference to the drawings.

  FIG. 1 shows a right side view of the sock 1 worn by a person, FIG. 2 shows a plan view of the sock 1 crossed in the vicinity of the heel, rotated 180 degrees, and FIG. 3 being worn by a person FIG. 4 shows a bottom view of the sock 1 in the state of being turned 90 degrees to the left, and FIG. 4 shows a right side sectional view of the sock 1 that has been longitudinally cut.

  As shown in FIG. 1, the sock 1 has an open ring-shaped edge 2, an ankle 3 connected from the edge 2, a buttock 9 connected from the lower back surface to the bottom of the ankle 3, and an ankle It has a toe 4 connected to the front side of the part 3 and the heel 9 and a toe 5 connected to the tip of the toe 4.

The whole of the sock 1 is formed of a knit knitted by an appropriate knitting method.
In the rear part between the buttocks 9 and the ankles 3 of the sock 1, an anti-falling contact portion 20 is provided from the left and right heels K to the rear center of the Achilles tendon. The width L11 (upper and lower width in FIG. 1) of the anti-falling contact portion 20 can be formed to be 1.5 cm to 5 cm when worn by a person, and formed to be 2 cm to 4 cm. In this embodiment, it is preferably formed to be about 2.5 cm. The height L12 from the contact portion 20 for preventing overturning to the ground contact surface is a height about half the width L11 lower than the height from the ground contact surface to the height of the hook K.

  As shown in FIG. 2, the anti-falling adhesion portion 20 includes an inner weak elastic portion 21 continuing rearward from the inner ridge K1, an inner strong elastic portion 22 continuing from there to the vicinity of the Achilles tendon further backward, and the back of the Achilles tendon continuing from there. It has a part Achilles tendon release part 23, an outer strong elastic part 24 which goes halfway from the Achilles tendon release part 23 toward the mantle K2, and an outer weak elastic part 25 which continues from the outer mallet K2. On the front from the inner weak elastic portion 21 to the outer weak elastic portion 25, a normal knitting portion 29 knitted in the same manner as the material of the entire sock 1 and the same material as the manner of knitting is provided.

  The inner weak elastic portion 21 (and the outer weak elastic portion 25) is formed such that one end in the circumferential direction is in contact with the inner ridge K1 (and the outer ridge K2), and from the one end, the inner strong elastic segment 22 (and the outer strong elastic portion 24) The length L51 (and the length L55) to the other end connected to is formed to be less than half of the distance from the center of the inner collar K1 (and the outer collar K2) to the center of the Achilles tendon. The length L51 (and the length L55) can be formed to be about 2 cm to 4 cm when worn by a person, and is preferably formed to be about 2.5 cm to 3.5 cm, In this embodiment, it is formed to be about 3 cm which is preferable. The inner weak elastic portion 21 (and the outer weak elastic portion 25) has a shape in which ribs extending in the width direction (vertical direction in FIG. 1) are arranged in the circumferential direction (horizontal direction in FIG. 1). Elasticity in the circumferential direction is slightly stronger than that of the normal knitting portion 29 that constitutes the whole (it is necessary to have a little strong force to stretch and a little force to shrink), and it is constituted by a method or / and a material.

  The other end of the inner side elastic elastic portion 22 (and the outer side elastic elastic portion 24) is connected to the inner weak elastic portion 21 (and the outer weak elastic portion 25) in the circumferential direction and is connected to the Achilles tendon release portion 23 from this end. A length L52 (and a length L54) of up to is formed at a quarter or more of the distance from the center of the inner collar K1 (and the mantle K2) to the center of the Achilles tendon, preferably formed at a third or larger There is. The length L52 (and the length L54) can be formed to be about 1.5 cm to 4 cm when worn by a person, and is preferably formed to be about 2 cm to 3.5 cm, In this embodiment, it is formed to be about 2.5 cm, which is preferable. The inner weak elastic portion 21 (and the outer weak elastic portion 25) is a rib (inner weak elastic portion 21) extending in the width direction (vertical direction in FIG. 1). And a rib stronger than the outer weak elastic portion 25 in the circumferential direction (left and right direction in FIG. 1) and further in the circumferential direction than the inner weak elastic portion 21 (and the outer weak elastic portion 25) The film is composed of a method of knitting or / and a material having a high elasticity (a strong force is necessary to stretch and a shrinking force is also strong).

  The Achilles tendon release portion 23 is provided between the inner strong elastic portion 22 and the outer strong elastic portion 24. The Achilles tendon release portion 23 is formed to be weaker in elasticity than the inner and outer strong elastic portions 22 and 24 (the force necessary for stretching is weak and the force for shrinking is also weak). The length L53 from one end of the Achilles tendon release part 23 connected to the inner strong elastic part 22 to the other end of the Achilles tendon release part 23 connected to the outer strong elastic part 24 is 0.5 cm in a state worn by a person It can be formed to a length of about 3 cm, preferably to a length of about 1.0 to 2.5 cm, and in this embodiment, it is preferably formed to about 1.5 cm.

  With this configuration, in the tightness prevention portion 20 for preventing overturning, the inner weak elastic portion 21 and the outer weak elastic portion 25 have a higher degree of elasticity than their outer peripheries (a strong force is necessary for stretching and a strong shrinking force is also strong) The degree of elasticity of the Achilles tendon release part 23 corresponding to the back of the Achilles tendon and the normal knitting part 29 can be lowered (the force necessary for calling is weak and the contraction force is weak). In this case, the inner weak elastic portion 21 (and the outer weak elastic portion 25) present between the inner heel K1 (and the mantle K2) and the site where the Achilles tendon is can be brought into contact with the surface of the human foot as much as possible.

  That is, in general socks, a sock material often does not come in contact with the surface of a person's foot from the heel to the Achilles tendon. On the other hand, the inside weak elastic part 21 and the inside strong elastic part 22 (and the outside strong elastic part 24 and the outside weak elastic part 25) existing between the inner collar K1 (and the mantle K2) and the part where the Achilles tendon is By contacting the surface of a person's foot as much as possible, it is possible to stimulate the relevant site, and it is possible to prevent falling and twisting of the foot by grounding the foot while inclining inward. That is, generally, the inside of the foot is lifted and walked so that the outside of the foot is in contact with the foot, and it is likely to cause the leg to crouch or fall. On the other hand, unlike the general sock which is separated from the body surface, the portion between the inner collar K1 (and the mantle K2) and the portion where the Achilles tendon is located can contact the body surface as much as possible with this sock 1 . In particular, it is possible to stimulate by pressing and holding the acupuncture ligament located at the lower side of the mantle K2 somewhat backwardly by the outer strong elastic part 24 and the outer weak elastic part 25. Thereby, the small finger side of the foot is naturally raised It can be changed, and it can prevent rolling and falling firmly.

  The toe 4 is provided with an arch tightening portion 37 that encloses one round of upper, lower, left, and right with a constant width including the arch portion 8. The width L6 (refer to FIG. 3, the left and right direction in FIG. 3) of the arched tightening portion 37 can be formed to be about 3 cm to 7 cm when worn by a person, and formed to be about 4 cm to 6 cm In this embodiment, it is preferably formed to be about 5 cm.

  The arch tightening portion 37 has a shape in which ribs extending in the width direction (left and right direction in FIG. 1) are arranged in the circumferential direction (vertical direction and depth direction in FIG. 1), and generally constitutes the entire sock 1 Elasticity in the circumferential direction is slightly stronger than that of the portion 29 (see FIG. 2) (a little strong force is necessary to stretch and a little force to shrink), and it is constituted by a material or a material.

  Due to this elasticity, the arch tightening portion 37 tightens so as to lift the sole including the arch toward the instep of the foot with bone. By such tightening, the arch tightening portion 37 of the sock 1 forms a curved arch whose front and rear ends are lowered from the center of the ball 7 to the heel 9 with respect to the foot of the person wearing the foot. Can help. As a result, it is possible to assist the user in grounding the toe 5 downward with respect to the toe 5 which is further to the tip of the finger ball center 7 which descends downward.

  Further, the toe 4 is provided with a left and right tightening portion 35 surrounding the one turn in the upper, lower, left and right with a constant width on the arch side with the finger ball center 7 as an end. The width L4 (see FIG. 3, the left and right direction in FIG. 3) of the left and right tightening portions 35 can be formed to be about 0.5 cm to 3 cm when worn by a person, and to be about 1 cm to 2 cm. It is preferable to form, and in this embodiment, it is formed to be about 1.5 cm, which is preferable.

  The left and right tightening portion 35 is the upper surface side (the instep side of the foot), and the left and right strong tightening portion 35a in the range from the position about the center of the thumb to the position about the center of the little finger And the left and right weak tightening portions 35b.

  The left and right weak fastening portions 35b are generally knitted in a shape in which ribs extending in the width direction (left and right direction in FIG. 1) are arranged in the circumferential direction (vertical direction and depth direction in FIG. 1) Elasticity in the circumferential direction is slightly stronger than that of the portion 29 (see FIG. 2) (a little strong force is necessary to stretch and a little force to shrink), and it is constituted by a material or a material.

  The left and right strong fastening portions 35a have a shape in which ribs extending in the width direction (left and right direction in FIG. 1) (ribs having a greater unevenness than the left and right weak fastening portions 35b) are arranged in the circumferential direction (vertical direction and depth direction in FIG. 1) And, the elasticity in the circumferential direction is stronger than that of the left and right weak tightening portions 35b (more force is necessary to stretch and the force to shrink is also stronger) and / or the material is used.

  Due to this elasticity, the left and right tightening portions 35 tighten so that the toe side of the first metatarsus of the foot and the toe side of the fifth metatarsal are brought downward inward. By such tightening, the left and right tightening portions 35 of the sock 1 assist the person making the arch to create a curved arch so that both ends in the left and right direction of the foot are lowered and the center is raised. Can. Thereby, the thumb at the tip of the first metatarsus and the little finger at the tip of the fifth metatarsus can be extended to the left and right outside and downward.

  Also, the left and right tightening portions 35 are woven so that their cushioning properties do not change much or less than their surroundings. Thereby, the left and right tightening portions 35 can prevent the person wearing the sock 1 from walking so as to cause the finger ball (especially the thumb ball) to collide with the ground. That is, if the cushioning property of the finger ball (especially the thumb ball) is high, a person who wears it walks so as to apply the cushion portion to the ground unconsciously. If this happens, there is a possibility that the floating finger advances or a person who was not floating becomes a floating finger. On the other hand, by not enhancing (suppressing) the cushioning properties of the finger ball portion, it is possible to promote an appropriate grounding state and walking method without walking like putting the finger ball on the ground.

  As shown in FIG. 3, on the bottom of the sock 1, the four finger convex stimulation portion 31 corresponding to the thumb 5a, the index finger 5b, the middle finger 5c, and the ring finger 5d, and the little finger corresponding to the little finger 5e. A convex stimulation unit 30 configured by the convex stimulation unit 33 is provided. The convex stimulation portion 30 is formed of an appropriate cushioning material such as a pile cushion. As a result, the sole of the foot is easily touched to stimulate the stimulation, and it is difficult for the user to feel discomfort even when the user steps on the foot.

  The thumb 5a, the index finger 5b, the middle finger 5c, and the ring finger 5d are all longer than the width, and in particular, the length of the index finger 5b is from the base to the tip. It is formed in the same length as the thumb 5a. As a result, even if the length of the forefinger varies depending on the person and the forefinger is longer than the thumb, it is possible to avoid an excessively cramped state only for the forefinger, and it is possible to make each finger free.

  Further, although the base of the thumb 5a, the index finger 5b, the middle finger 5c, and the ring finger 5d are all arranged substantially horizontally, the root of the small finger 5e between the little finger 5e and the ring finger 5d Only the part is placed down greatly to the arch side. Thereby, while passing the thumb firmly through the thumb 5a and the little finger firmly through the little finger 5e, the other finger is also not cramped, and it is comfortably through the index finger 5b, the middle finger 5c, and the ring finger 5d. It is configured to be available.

  The convex stimulation unit 31 for the fourth finger has a joint line 6a at the base of the thumb 5a (a line of a joint at the base of the thumb of a person) and a joint line 6b at the base of the forefinger 5b (a joint at the base of the forefinger of a person Of the middle finger 5c, the joint line 6c at the base of the middle finger 5c (the line of the joint at the base of the human middle finger), and the position of the joint line 6d at the base of the ring finger 5d (the line of the joint at the base of the human finger) It is provided between the joint line position P1 and the finger ball center position P2 (position of the center of the mother and infant balls) which is the position of the finger ball center 7 of the foot. In this embodiment, the four-finger convex stimulation unit 31 is provided closer to the joint line position P1 than the center positions of the joint line position P1 and the finger ball center position P2. More specifically, the convex stimulation unit 31 for four fingers is provided at the positions of the indirect lines 6a, 6b, 6c, 6d or from the joint line position P1 which is the position of the indirect lines 6a, 6b, 6c, 6d The distance L2 to the center position of the convex stimulation unit 31 for four fingers can be provided at a position shorter than the distance L3 from the center position of the convex stimulation unit 31 for four fingers to the fingerball center position P2, and the distance L3 Is preferably provided at a position equal to or less than a half of the distance L3, and more preferably provided at a position equal to or less than a third of the distance L3. In this embodiment, provided at about a quarter of the suitable distance L3. It is done.

  Further, the length of the convex stimulation unit 31 for four fingers is outside the center of the thumb 5a (upper side in FIG. 3), that is, outside the center of the ring finger 5d from the position where it can cover almost the entire thumb 5a It is formed in the length to the position which can cover the substantially whole of the ring finger part 5d, ie, the lower side of FIG.

  The small finger convex stimulation unit 33 is located at a position of the center line 7 of the foot from the joint line position P3 which is the position of the joint line 6e (the line of the joint of the base at the human little finger) at the base of the little finger 5e. It is provided between certain finger ball center positions P2 (the position of the center of the mother and ball) (or between the centers of the little finger balls). This position is on the arch side with respect to the root portion of the little finger portion 5e, and is clearly different from the convex stimulation portion 31 for four fingers which is on the fingertip side of the root portion of the little finger portion 5e. It is preferable that the little finger convex stimulation unit 33 is provided at the position of the indirect line 6e or between the joint line position P3 which is the position of the indirect line 6e and the finger ball center position P2.

  The distance L9 from the position of the foot sole longitudinal direction (left and right direction in FIG. 3) of the convex stimulation part 31 for four fingers to the position of the foot sole longitudinal direction of the convex stimulation part 33 for little fingers is 0.5 cm to 1.5 cm In this embodiment, it is formed to a suitable size of about 1 cm.

  The width (right and left direction in FIG. 3) of the convex stimulation part 31 for four fingers and the convex stimulation part 33 for little fingers can be 0.1 cm to 1.5 cm in a state worn by a person, 0 The width is preferably in the range of 2 cm to 1.0 cm, and in this embodiment, the width is preferably about 0.8 cm.

  The thickness of the convex stimulation part 31 for four fingers and the convex stimulation part 33 for little fingers is thicker than the surrounding thickness (usually the thickness of the knitted part 29) as shown in the cross-sectional view of FIG. It is configured to be convex on the (foot side) and is preferably 0.1 cm to 0.5 cm, and in this embodiment, it is formed to be about 0.3 cm, which is preferable.

  With this configuration, the convex stimulation unit 30 stimulates the sole of the foot between the base of the toe with the joint line 6 (6a, 6b, 6c, 6d, 6e) and the sole. For this reason, the person who wears the sock 1 naturally bends the toes 5 due to the condition reflection of the body, and the toes 5 come in contact with the ground. In particular, since the convex stimulation portion 30 is separated from the center of the finger ball 7 to the toe 5 side, it does not exist in the portion where weight is applied between the ground contact surface and the foot, and there is no sense of discomfort for the person wearing it. As well as providing good comfort, it is possible to prevent the convex stimulation portion 30 from being walked against the ground as if it were a cushion.

  In addition, since the convex stimulation units 30 are provided at different positions in the convex stimulation units 31 for the four fingers and the convex stimulation units 33 for the little finger, the convex stimulation units 31 for the four fingers are the thumb 5a and the index finger unit The small finger 5b, the middle finger 5c, and the ring finger 5d can be bent firmly, and the little finger convex evoked portion 33 can bend the little finger 5e firmly. If the little finger convex stimulation part 33 is at the same position as the four finger convex stimulation part 31 in the longitudinal direction of the sole, it contacts the back of the little finger part 5e, and a sufficient function can not be exhibited. On the other hand, the sock 1 is different only in the position of the little finger convex stimulation part 33 corresponding to the little finger part 5e, so that the small finger part 5e can be appropriately bent to give a proper stimulation, and the floating finger Can be used to prevent or improve

  In addition, since the little finger convex stimulation part 33 is formed long enough to cover the corresponding position of the ring finger part 5d, the little finger part 5e can be surely and favorably stimulated and bent. Even if the little finger convex stimulation part 33 is placed on the ring finger part 5 d corresponding part, there is no problem because the ring finger part 5 d is bent by the four finger convex stimulation part 31.

  In addition, since the right and left tightening portions 35 assist in forming an arch in the left and right direction with respect to the toes, the toes 5 firmly opened thereby are bent to be grounded by the convex stimulation portion 30. Can be used to prevent and improve floating fingers more effectively.

  Furthermore, by forming an arch in the longitudinal direction of the toe with the above-mentioned arch tightening portion 37, the end of the toe 5 is naturally assisted in the direction of contact with the ground. It can be useful for improvement.

  In addition, as for the usual knitting part 29 which comprises the sock 1 whole, it is desirable to be comprised using an appropriate elastic material, and the site | part comprised with a highly elastic knitting method and / or a raw material has the required strong strength of elasticity. Depending on the size, it is formed of a material into which a rubber thread having a stronger elastic force is inserted.

Further, in the correspondence between the present invention and the embodiment,
The first row portion corresponds to the convex stimulation portion 31 for four fingers,
The second row portion corresponds to the convex stimulation portion 33 for little finger, but the present invention is not limited to the present embodiment, and can be other various embodiments.

  For example, in this embodiment, the four-finger convex stimulation part 31 and the little finger convex stimulation part 33 are separately provided in a two-stage configuration separated from one another. The same convex stimulation part may be provided continuously between the convex stimulation part 31 for fingers and the convex stimulation part 33 for little fingers. Also in this case, the same function can be exhibited.

Also, although the sock 1 is configured as a knit, it may be configured as a fabric.
In addition, socks 1 are socks of general length (short socks), but it is not limited to this, cover socks with visible instep, sneaker length socks, socks with long legs up to shin, knees up to knees It can be used for various socks such as knee high socks and tights. In this case, if it is a cover sock, it can be configured to include at least a convex stimulation unit 30, and if it is a foot bag sock, a configuration including at least a convex stimulation unit 30, left and right tightening portions 35, and arch tightening portions 37 Just do it. Also in this case, the function of the functional unit provided can be exhibited.

  The present invention can be used in the industry that manufactures and sells socks, and in the industry that uses socks to promote health.

DESCRIPTION OF SYMBOLS 1 ... Socks 6, 6a, 6b, 6c, 6e ... Joint line 7 ... Finger ball center 31 ... Convex stimulation part 33 for four fingers ... Convex stimulation part 35 for little fingers ... Left and right tightening part 37 ... Earthing tightening part

According to the present invention, a convex stimulation portion which is convex toward the foot side and stimulates the sole between the joint line on the back side of the base of each person's toes and the center position of the finger ball is provided . The part does not exist on the toe side with respect to the joint line, and is configured to stimulate between all the joint lines of the thumb, forefinger, middle finger, ring finger and little finger and the center of the ball, and the thumb and the finger A convex stimulation part for four fingers formed in a series of straight lines or curves extending from the outside of the center of the thumb to the outside of the center of the finger so as to connect all in correspondence with the index finger, the middle finger, and the ring finger And a sock having a little finger convex stimulation part corresponding to the little finger disposed so as to be lowered to the arch side with respect to the substantially side-by-side four finger convex stimulation part .

Claims (6)

A sock having a convex stimulation portion which is convex toward the foot side and stimulates the sole at a position between the joint line on the back side of the base of each person's toes and the center position of the finger ball or at the position of the indirect line. The convex stimulation unit is
The sock according to claim 1, which is configured to stimulate between all the joint lines of the thumb, forefinger, middle finger, ring finger and little finger and the center of the ball. The convex stimulation portion is formed in a two-stage configuration of a first row portion and a second row portion,
The first row portion is
A region corresponding to the thumb, the index finger, the middle finger, and the ring finger is formed in a series of straight lines or a curved line so as to connect all of them;
The second row portion is
The sock according to claim 2, wherein the part corresponding to the little finger is formed on the side of the little finger ball which is a part of the finger ball rather than the linear shape formed in the linear shape or the curved shape. 4. The sock according to claim 1, 2 or 3, further comprising a left and right tightening portion for tightening at least the foot circumference on the arch side of the line connecting the center of the ball and the center of the small ball among the finger balls. The sock according to claim 4, wherein the left and right tightening portions are formed to have a cushioning property equal to or less than the cushioning property of the surrounding material. The sock according to any one of claims 1 to 5, further comprising an arch tightening portion for tightening a foot circumference including the arch.

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