JP2023019217A - Stretch instrument - Google Patents

Abstract

To provide a stretch instrument for assisting a stretch motion for joints and muscles of a lower half of the body executed by a user alone.SOLUTION: A stretch instrument 100 includes a first plate 1 having a plane 11 on which an instep 51 of a user U is placed, a second plate 2 having a plane 21 on which a shin part 52 of the leg of the user U is placed, a first support part 4A fixed perpendicularly to the plane of the first plate 1, a seat part 4C supported by the first support part 4A having a seat face 4B on which the user U places his or her hip 53, and a second plate support part 8 for supporting the second plate 2 so that the second plate 2 is inclined with respect to the first plate 1.SELECTED DRAWING: Figure 5

Description

The present invention relates to stretching equipment.

BACKGROUND ART Conventionally, various devices for stretching body muscles and joints have been proposed. For example, Patent Literature 1 below discloses a stretch board that stretches a user by placing and moving a foot on a footrest installed in an inclined state on a frame provided with a rocking installed portion. . Further, Patent Document 2 below discloses a stretching device that allows the user to lie on the upper surface of the stretching device and place the neck on the upper surface of the neck-resting portion, thereby allowing the cervical vertebrae to be stretched in a curved state. are doing.

JP 2018-202039 A Japanese Patent Application Laid-Open No. 2021-13661

By the way, sacroiliac joint disorder is one of the causes of lumbago in men and women of all ages. The sacroiliac joint is a joint between the pelvic bones, the sacrum and the ilium, and is strongly connected by surrounding ligaments. The sacroiliac joint is located at the base of the spine and has a slight movement of 3-5 mm that is barely noticeable on imaging studies (see Figure 11).

The sacroiliac joint plays an important role among human joints, as it is thought to balance the spine from the root, like the seismic isolation structure of a building, so that it can respond to the movements of daily life. However, working in the middle of the waist, careless movements, or repetitive loading can cause minor misconformities in the sacroiliac joints, resulting in pain. And this can lead to even more back pain.

However, conventionally, the only basic way to deal with a sacroiliac joint disorder is to take conservative treatment such as resting, taking painkillers, or wearing a pelvic rubber belt. If these conservative treatments do not improve the pain, there is no choice but to inject a local anesthetic into the sacroiliac joint to alleviate the pain.

In addition, in order to improve the stability of the sacroiliac joint, it is necessary to perform appropriate stretching movements for the muscles around the pelvis and hip joints. is difficult.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stretching device that assists a user to stretch the joints and muscles of the lower body by himself.

The stretching device of the present invention has the following means to achieve the above objects.

(1) a first plate having a flat surface on which the instep of the user's foot is placed;
a second plate having a flat surface for resting the shin of the user's foot;
a first support fixed perpendicular to the plane of the first plate;
a seat portion supported by the first support portion and having a seat surface on which the user rests the buttocks;
a second plate supporting portion that supports the second plate so that the second plate is inclined with respect to the first plate.

In this configuration, the user first places the insteps of both feet on the first plate and places the shins on the second plate. Then, in this state, the buttocks are placed on the seat surface of the seat portion supported by the first support portion. In other words, the user assumes a posture in which the buttocks are lifted from the state of sitting straight.

At this time, since the second plate is inclined with respect to the first plate, both knees of the user are lifted toward the body, so the center of gravity of the body is lowered toward the back, and the user can adjust the posture. easier to maintain. In addition, by placing the buttocks on the seat surface of the seat, the user can maintain his or her posture and perform stretching actions without applying excessive tension to the buttocks and hamstrings.

In order to improve the stability of the sacroiliac joints by stretching, tilt the pelvis forward and backward to move the sacroiliac joints and stretch the muscles around the pelvis such as the iliopsoas muscles and the muscles around the hip joints. It is important to let

Therefore, by using the stretching device of the present invention and taking the posture described above, the user can perform the following stretching motions to improve the stability of the sacroiliac joints.

With the insteps of both feet placed on the first plate and the shins placed on the second plate, the user leans forward while rounding the back. This causes the pelvis to tilt backwards and the sacroiliac joints to open outward. In addition, with the insteps of both feet placed on the first plate and the shins placed on the second plate, the user arches the back (in other words, pulls the shoulder blades together and presses the chest). (stretched position), then bend your body forward. This causes the pelvis to tilt forward and the sacroiliac joints to close inward.

By performing such stretching actions, the user can move the sacroiliac joint and stretch the iliopsoas muscles and the muscles around the hip joint, thereby improving the stability of the sacroiliac joint. can. By using the stretching device of the present invention, the user can easily perform such a stretching action by himself/herself.

(2) The first support has an adjustment mechanism for adjusting the height of the seat.

With this configuration, the height of the seat can be adjusted according to the height of the user, thereby improving convenience for the user.

(3) The seat tilts in the direction of the load when the user places the buttocks on the seat surface.

In this configuration, the seat tilts to a predetermined angle in the weighting direction (downward) according to the weight when the user places the buttocks on the seat surface, so that the user can easily take a posture in which the body is tilted forward. . That is, the user can perform the stretching motion more smoothly.

The stretching device of the present invention can assist the user to stretch the joints and muscles of the lower body by himself.

1 is a plan view of a stretching device 100 according to a first embodiment of the invention; FIG. 1 is a top perspective view of a stretching device 100 according to a first embodiment of the invention; FIG. 1 is a bottom perspective view of stretching device 100 according to the first embodiment of the present invention; FIG. FIG. 10 is a bottom perspective view of the stretching device 100 showing the process of attaching the second plate supporting portion 8 to the second plate 2; 1 is a diagram showing a usage method (1) of the stretching device 100 according to the first embodiment of the present invention; FIG. FIG. 10 is a diagram for explaining the movement of the sacroiliac joint 60 in usage (1). FIG. 4 is a diagram showing a usage method (2) of the stretching device 100 according to the first embodiment of the present invention; FIG. 10 is a diagram for explaining the movement of the sacroiliac joint 60 in usage (2). Fig. 10 is a side view of the stretching device 101 according to the second embodiment of the invention; 4C is a side view of the stretching device 102 for another embodiment of the seat 4C. FIG. FIG. 4 is a diagram for explaining the sacroiliac joint;

A stretching device 100 according to a first embodiment of the present invention will be described below.

FIG. 1 is a plan view of a stretching device 100 according to the first embodiment of the invention. FIG. 2 is a top perspective view of the stretching device 100 according to the first embodiment of the invention. FIG. 3 is a bottom perspective view of the stretching device 100 according to the first embodiment of the invention. FIG. 4 is a bottom perspective view of the stretching device 100 showing the process of attaching the second plate supporting portion 8 to the second plate 2. FIG.

Hereinafter, the X-axis direction corresponds to the horizontal left-right direction, the Y-axis direction corresponds to the horizontal front-rear direction, and the Z-axis direction corresponds to the vertical up-down direction. The Y-axis direction and the Z-axis direction are orthogonal to the X-axis direction. The X-axis direction may be referred to as the leftward or rightward direction, the Y-axis direction as the forward direction or the rearward direction, and the Z-axis direction as the upward direction or downward direction.

As shown in FIGS. 1 and 2, the stretching device 100 includes a first plate 1 having a flat surface 11 on which the instep 51 of the user U's foot is placed, and a shin 52 of the user's U foot. A second plate 2 having a plane 21 on which it is placed, a first support portion 4A fixed in a direction perpendicular to the plane 11 of the first plate 1, and supported by the first support portion 4A, and the user U is supported by the buttocks. A seat portion 4C having a seat surface 4B on which 53 is placed;

The first plate 1 is a thin, substantially rectangular parallelepiped flat plate, and is installed horizontally with respect to the floor when the user U uses it. The plane 11 is the upper surface of the first plate 1 and is the surface on which the instep 51 of the user's U foot is placed. Further, the flat surface 11 is provided with a concave portion 5 for enabling removal of the first support portion 4A. A layer made of a cushioning material (for example, urethane resin) may be provided on the surface of the flat surface 11 as a cushioning portion for elastically receiving the instep portion 51 of the user U's foot.

The second plate 2 is a thin, substantially rectangular parallelepiped flat plate, and is configured to be inclined with respect to the first plate 1 by being supported by the second plate supporting portions 8 (8a, 8b) attached to the bottom surface 22. It is The plane 21 is the upper surface of the second plate 2, and when the user U places the instep 51 of the foot on the plane 11 of the first plate 1, the shin 52 of the user's foot is placed. It is the aspect to be done.
A layer made of a cushioning material (for example, urethane resin) may be provided on the surface of the flat surface 21 as a cushioning portion for elastically receiving the shin portion 52 of the user U's leg.

The first plate 1 and the second plate 2 are connected via a connecting shaft 3 extending in the X-axis direction, and are rotatable about the connecting shaft 3 as an axis.

As shown in FIG. 2, connecting portions 30a to 30d are adhered to the bottom surface 12 of the first plate 1 and the bottom surface 22 of the second plate 2, respectively. 3 is rotatably connected. Thereby, the first plate 1 and the second plate 2 are connected via the connecting shaft 3 . By rotatably connecting the first plate 1 and the second plate 2, the stretching device 100 can be folded such that the bottom surfaces of the first plate 1 and the second plate 2 are put together. Therefore, when the stretching device 100 is not in use, the stretching device 100 can be made compact and stored in a predetermined place.

The connection portion 30a on the first plate 1 side is provided with a housing hole 6a for housing the second plate support portion 8a. Similarly, the connecting portion 30b is provided with a housing hole 6b for housing the second plate support portion 8b.

Each of the second plate support portions 8a and 8b has a substantially rectangular parallelepiped shape, and each of the second plate support portions 8a and 8b is provided with a depression on one side thereof so as to facilitate removal from the storage holes 6a and 6b. there is

The connecting portions 30c and 30d on the second plate 2 side are provided with a plurality of mounting holes 7a to 7d, respectively. The mounting holes 7a to 7d are respectively formed so that the second plate support portions 8a and 8b can be inserted from the bottom side, and as shown in FIG. 3, the second plate support portions 8a and 8b are mounted in the longitudinal direction. . By providing a plurality of mounting holes 7a to 7d, the mounting positions of the second plate support portions 8a and 8b can be changed, thereby making it possible to change the inclination angle of the second plate 2. FIG.

As for the angle of inclination of the second plate 2, when the mounting surface of the stretching device 100 is a horizontal plane, the angle of inclination of the second plate 2 is within a range of up to about 30 degrees upward from the horizontal plane with the connecting shaft 3 as the proximal end, as viewed from the side in the X-axis direction. It is desirable to be Among them, an inclination angle of about 20 degrees is particularly desirable as the inclination angle of the second plate 2 . When the inclination angle of the second plate 2 is within the above range, the user U can easily maintain his or her posture while using the stretching device 100 .

In this embodiment, four mounting holes 7a to 7d are provided, but the number of mounting holes is not limited to this, and may be increased to six or eight. Thereby, the inclination angle of the second plate 2 can be adjusted stepwise.

The seat portion 4C has a seat surface 4B on which the user U places the buttocks. The seat surface 4B is a part on which the user's U buttocks 53 are placed, and is made of a cushioning material (for example, urethane resin or the like) that elastically receives the user's U buttocks 53 . The seat surface 4B may be a flat surface, but preferably has an upwardly curved mountain-like shape (a mountain-like shape when viewed from the side in the X-axis direction) as shown in FIG. It becomes easier to tilt the upper body forward during movement.

The first support portion 4A is formed so as to be able to fit into the recess 5 provided on the plane 11 of the first plate 1, and by fitting into the recess 5, the first support portion 4A can move in the direction perpendicular to the plane 11 of the first plate 1. (that is, perpendicular to the floor). When the stretch device 100 is not in use, the first support portion 4A can be pulled out from the recess 5 and the first support portion 4A and the seat portion 4C can be removed from the stretch device 100, so the stretch device 100 can be easily stored.

Further, the first support portion 4A is fixed at a substantially central position with respect to the length of the first plate 1 in the X-axis direction. With this configuration, the user U can place the insteps of both feet on the first plate 1 so as to sandwich the first support part 4A, and the seat surface 4B of the seat part 4C corresponds to the buttocks 53. will be placed in position. That is, the user U can take a posture in which the buttocks 53 are lifted from the state of sitting straight.

Also, if the length of the first support portion 4A in the Z-axis direction in FIG. I can't. Conversely, if the length of the first support portion 4A is too long, the user U cannot properly perform the stretching action. Therefore, the length of the first support portion 4A for allowing the user U to perform an appropriate stretching action is preferably in the range of approximately 25 cm to 30 cm.

In this embodiment, the recess 5 is provided in the flat surface 11 of the first plate 1 in order to fix the first support portion 4A to the first plate 1. However, if the first support portion 4A can be fixed to the first plate 1, A hole penetrating the plane 11 may be provided instead of the recess 5 . This configuration simplifies the manufacturing process of the first plate 1 rather than providing the concave portion 5 on the flat surface 11, so that the manufacturing cost can be reduced.

Next, a method for using the stretching device 100 will be described.

FIG. 5 is a diagram showing a usage method (1) of the stretching device 100 according to the first embodiment of the present invention. FIG. 6 is a diagram for explaining the movement of the sacroiliac joint 60 in usage (1). FIG. 7 is a diagram showing a usage method (2) of the stretching device 100 according to the first embodiment of the present invention. FIG. 8 is a diagram for explaining the movement of the sacroiliac joint 60 in usage (2).

First, the user U places the insteps 51 of both feet on the first plate 1 and places the shins 52 on the second plate 2 . Then, in this state, the buttocks 53 are placed on the seat surface 4B of the seat portion 4C supported by the first support portion 4A. That is, the user U assumes a posture in which the buttocks 53 are lifted from the state of sitting on one's knees. At this time, since the second plate 2 is inclined with respect to the first plate 1, both knees of the user U are lifted toward the body, so that the center of gravity of the body is lowered toward the back and the user is U is easier to maintain posture. Further, by placing the buttocks 53 on the seat surface 4B of the seat portion 4C, the user U can perform a stretching action without applying excessive tension to the buttocks 53 and hamstrings.

In order to improve the stability of the sacroiliac joint 60 by stretching, it is necessary to tilt the pelvis forward and backward to stretch the iliopsoas muscles around the pelvis (the psoas major and psoas minor muscles attached from the spinal column, It is important to stretch and contract the compound muscle consisting of three iliac muscles that attach from the hip) and the muscles around the hip joint.

By using the stretching device 100 and taking such a posture, the user U can perform a stretching motion that improves the stability of the sacroiliac joint 60 from the following motions.

(How to use (1))
With the insteps 51 of both feet placed on the first plate 1 and the shins 52 placed on the second plate 2 (FIG. 5(a)), the user U bends his/her body while rounding his back. It is pushed forward (Fig. 5(b)). Then, the pelvis tilts backward, and the sacroiliac joint 60 tries to open outward as shown in FIG.

(How to use (2))
With the insteps 51 of both feet placed on the first plate 1 and the shins 52 placed on the second plate 2 (FIG. 7A), the user U arches the back ( In other words, the body is tilted forward with the shoulder blades together and the chest puffed out (Fig. 7(b)). Then, the pelvis tilts forward and the sacroiliac joint 60 tends to close inward as shown in FIG.

By performing such a stretching motion, the user U can move the sacroiliac joint 60 and stretch and contract the iliopsoas muscles and muscles around the hip joint, thereby improving the stability of the sacroiliac joint 60. be able to. By using the stretching device 100 of the present invention, the user can easily perform such a stretching action by himself/herself.

(Confirmation of validity)
Stretching motions similar to those described above were performed on 100 patients who complained of buttock pain, groin pain, and low back pain, which are believed to be of sacroiliac joint origin. None of the patients had previously performed stretching movements similar to those described above. The results of the patient's evaluation of improvement in symptoms after performing the same stretching motion as above are summarized below.
Significant improvement: 24 people (24.0%)
Improvement: 46 people (46.0%)
Somewhat improved: 21 people (21.0%)
Not much improvement: 9 (9.0%).

Overall, 91% of the patients showed some improvement after continuing with the same stretching exercises as above. Most of the patients who showed improvement were confirmed to have alleviation of symptoms such as buttock pain, groin pain, or low back pain.

Next, the stretching device 101 of the second embodiment will be explained. FIG. 9 is a side view of the stretching device 101 of the second embodiment. In FIG. 9, the same reference numerals are given to the same or equivalent components as those in the first embodiment, and the description of the components will be omitted unless a particular description is required.

Although the height of the seat portion 4C is constant in the first embodiment, the height of the seat portion 4C is adjustable in the second embodiment.

The first support portion 40 of the stretching device 101 has an adjustment mechanism that adjusts the height of the seat portion 4C in the Z-axis direction (upward). The adjustment mechanism is composed of a slide frame 40b having an arbitrary number of height adjustment holes HL at required portions, and a frame main body 40a into which the slide frame 40b can be freely inserted and removed. The frame main body 40a is provided with a height adjusting pin SC that can be inserted into and removed from the height adjusting hole HL provided in the slide frame 40b. The height adjusting pin SC is inserted into the height adjusting hole HL and inserted into the frame main body 40a. The height of the seat portion 4C can be adjusted by moving the slide frame 40b to a desired height. A compression spring (not shown) is installed in the height adjustment pin SC, and the height adjustment pin SC is pulled out and the tip of the height adjustment pin SC is brought into correspondence with the adjustment hole HL of the desired height. Release the adjustment pin SC. Then, the tip of the height adjustment pin SC is fitted into the height adjustment hole HL by the action of the biasing force of the push spring, and the seat portion 4C is fixed at the desired height.

With such a configuration, the height of the seat portion 4C can be adjusted according to the height of the user U, thereby improving convenience for the user.

In the above-described embodiment, the seat portion 4C is fixed, but as shown in FIG. ). In this case, the seat portion 4C and the first support portion 4A are connected via a rod-shaped axis AX extending in the X-axis direction, and a spring is wound around the axis AX. Then, the biasing force of the spring is applied to the seat portion 4C.

With such a configuration, the seat surface 4B is tilted to a predetermined angle in the weighting direction (downward) according to the load when the user U places the buttocks 53 on the seat surface 4B. ) or a posture in which the body is tilted forward as shown in FIG. 7(b). In other words, the stretching device 102 allows the user to perform stretching actions more smoothly.

In the above-described embodiment, the second plate support portions 8a and 8b are configured to be accommodated in the connecting portions 30a and 30b on the side of the first plate 1. and the second plate support portions 8a and 8b may be accommodated in the accommodation portion. Thereby, the configuration of the stretching device 100 can be further simplified.

In addition, in the above-described embodiment, the two second plate support portions 8a and 8b are provided to give the second plate 2 a slope. may be 1 or 3 or more.

Reference Signs List 1 First plate 2 Second plate 3 Connecting shaft 4A First support portion 4B Seat surface 4C Seat portion 5 Recesses 6a, 6b Storage holes 7a, 7b, 7c, 7d Mounting holes 8, 8a , 8b... Second plate supporting part 11... Flat surface 12... Bottom surface 21... Flat surface 22... Bottom surfaces 30a, 30b, 30c, 30d... Connecting part 40... First supporting part 40a... Frame main body 40b... Slide frame 51... Upper part 52... Tibia 53 Hip 60 Sacroiliac joint 100 Stretching device AX Axis HL Height adjustment hole SC Height adjustment pin U User

Claims (3)

a first plate having a flat surface on which the instep of the user's foot rests;
a second plate having a flat surface for resting the shin of the user's foot;
a first support fixed perpendicular to the plane of the first plate;
a seat portion supported by the first support portion and having a seat surface on which the user rests the buttocks;
a second plate supporting portion that supports the second plate so that the second plate is inclined with respect to the first plate. 2. The stretching device according to claim 1, wherein the first support has an adjustment mechanism for adjusting the height of the seat. 3. The stretching device according to claim 1, wherein the seat tilts in the direction of load applied when the user places the buttocks on the seat surface.

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